1223 files changed, 351321 insertions, 0 deletions

diff --git a/src/grep/.mailmap b/src/grep/.mailmap
new file mode 100644
index 0000000..22636cb
--- /dev/null
+++ b/src/grep/.mailmap
@@ -0,0 +1,12 @@
+# Map git author names and email addresses to canonical/preferred form.
+<jim@meyering.net> <meyering@fb.com>
+<jim@meyering.net> <meyering@redhat.com>
+<karl@gnu.org> <karl@tug.org>
+Paul Eggert <eggert@cs.ucla.edu> <eggert@penguin.cs.ucla.edu>
+Paul Eggert <eggert@cs.ucla.edu> <eggert@CS.UCLA.EDU>
+<eggert@cs.ucla.edu> <eggert@twinsun.com>
+<karl@gnu.org> <karl@freefriends.org>
+<bonzini@gnu.org> <pbonzini@redhat.com>
+
+# Correct misspelled last name
+Norihiro Tanaka <noritnk@kcn.ne.jp> Norihirio Tanaka <noritnk@kcn.ne.jp>
diff --git a/src/grep/.tarball-version b/src/grep/.tarball-version
new file mode 100644
index 0000000..475ba51
--- /dev/null
+++ b/src/grep/.tarball-version
@@ -0,0 +1 @@
+3.7
diff --git a/src/grep/ABOUT-NLS b/src/grep/ABOUT-NLS
new file mode 100644
index 0000000..b1de1b6
--- /dev/null
+++ b/src/grep/ABOUT-NLS
@@ -0,0 +1,1282 @@
+1 Notes on the Free Translation Project
+***************************************
+
+Free software is going international!  The Free Translation Project is
+a way to get maintainers of free software, translators, and users all
+together, so that free software will gradually become able to speak many
+languages.  A few packages already provide translations for their
+messages.
+
+   If you found this `ABOUT-NLS' file inside a distribution, you may
+assume that the distributed package does use GNU `gettext' internally,
+itself available at your nearest GNU archive site.  But you do _not_
+need to install GNU `gettext' prior to configuring, installing or using
+this package with messages translated.
+
+   Installers will find here some useful hints.  These notes also
+explain how users should proceed for getting the programs to use the
+available translations.  They tell how people wanting to contribute and
+work on translations can contact the appropriate team.
+
+1.1 INSTALL Matters
+===================
+
+Some packages are "localizable" when properly installed; the programs
+they contain can be made to speak your own native language.  Most such
+packages use GNU `gettext'.  Other packages have their own ways to
+internationalization, predating GNU `gettext'.
+
+   By default, this package will be installed to allow translation of
+messages.  It will automatically detect whether the system already
+provides the GNU `gettext' functions.  Installers may use special
+options at configuration time for changing the default behaviour.  The
+command:
+
+     ./configure --disable-nls
+
+will _totally_ disable translation of messages.
+
+   When you already have GNU `gettext' installed on your system and run
+configure without an option for your new package, `configure' will
+probably detect the previously built and installed `libintl' library
+and will decide to use it.  If not, you may have to to use the
+`--with-libintl-prefix' option to tell `configure' where to look for it.
+
+   Internationalized packages usually have many `po/LL.po' files, where
+LL gives an ISO 639 two-letter code identifying the language.  Unless
+translations have been forbidden at `configure' time by using the
+`--disable-nls' switch, all available translations are installed
+together with the package.  However, the environment variable `LINGUAS'
+may be set, prior to configuration, to limit the installed set.
+`LINGUAS' should then contain a space separated list of two-letter
+codes, stating which languages are allowed.
+
+1.2 Using This Package
+======================
+
+As a user, if your language has been installed for this package, you
+only have to set the `LANG' environment variable to the appropriate
+`LL_CC' combination.  If you happen to have the `LC_ALL' or some other
+`LC_xxx' environment variables set, you should unset them before
+setting `LANG', otherwise the setting of `LANG' will not have the
+desired effect.  Here `LL' is an ISO 639 two-letter language code, and
+`CC' is an ISO 3166 two-letter country code.  For example, let's
+suppose that you speak German and live in Germany.  At the shell
+prompt, merely execute `setenv LANG de_DE' (in `csh'),
+`export LANG; LANG=de_DE' (in `sh') or `export LANG=de_DE' (in `bash').
+This can be done from your `.login' or `.profile' file, once and for
+all.
+
+   You might think that the country code specification is redundant.
+But in fact, some languages have dialects in different countries.  For
+example, `de_AT' is used for Austria, and `pt_BR' for Brazil.  The
+country code serves to distinguish the dialects.
+
+   The locale naming convention of `LL_CC', with `LL' denoting the
+language and `CC' denoting the country, is the one use on systems based
+on GNU libc.  On other systems, some variations of this scheme are
+used, such as `LL' or `LL_CC.ENCODING'.  You can get the list of
+locales supported by your system for your language by running the
+command `locale -a | grep '^LL''.
+
+   Not all programs have translations for all languages.  By default, an
+English message is shown in place of a nonexistent translation.  If you
+understand other languages, you can set up a priority list of languages.
+This is done through a different environment variable, called
+`LANGUAGE'.  GNU `gettext' gives preference to `LANGUAGE' over `LANG'
+for the purpose of message handling, but you still need to have `LANG'
+set to the primary language; this is required by other parts of the
+system libraries.  For example, some Swedish users who would rather
+read translations in German than English for when Swedish is not
+available, set `LANGUAGE' to `sv:de' while leaving `LANG' to `sv_SE'.
+
+   Special advice for Norwegian users: The language code for Norwegian
+bokma*l changed from `no' to `nb' recently (in 2003).  During the
+transition period, while some message catalogs for this language are
+installed under `nb' and some older ones under `no', it's recommended
+for Norwegian users to set `LANGUAGE' to `nb:no' so that both newer and
+older translations are used.
+
+   In the `LANGUAGE' environment variable, but not in the `LANG'
+environment variable, `LL_CC' combinations can be abbreviated as `LL'
+to denote the language's main dialect.  For example, `de' is equivalent
+to `de_DE' (German as spoken in Germany), and `pt' to `pt_PT'
+(Portuguese as spoken in Portugal) in this context.
+
+1.3 Translating Teams
+=====================
+
+For the Free Translation Project to be a success, we need interested
+people who like their own language and write it well, and who are also
+able to synergize with other translators speaking the same language.
+Each translation team has its own mailing list.  The up-to-date list of
+teams can be found at the Free Translation Project's homepage,
+`http://translationproject.org/', in the "Teams" area.
+
+   If you'd like to volunteer to _work_ at translating messages, you
+should become a member of the translating team for your own language.
+The subscribing address is _not_ the same as the list itself, it has
+`-request' appended.  For example, speakers of Swedish can send a
+message to `sv-request@li.org', having this message body:
+
+     subscribe
+
+   Keep in mind that team members are expected to participate
+_actively_ in translations, or at solving translational difficulties,
+rather than merely lurking around.  If your team does not exist yet and
+you want to start one, or if you are unsure about what to do or how to
+get started, please write to `coordinator@translationproject.org' to
+reach the coordinator for all translator teams.
+
+   The English team is special.  It works at improving and uniformizing
+the terminology in use.  Proven linguistic skills are praised more than
+programming skills, here.
+
+1.4 Available Packages
+======================
+
+Languages are not equally supported in all packages.  The following
+matrix shows the current state of internationalization, as of June
+2010.  The matrix shows, in regard of each package, for which languages
+PO files have been submitted to translation coordination, with a
+translation percentage of at least 50%.
+
+     Ready PO files       af am an ar as ast az be be@latin bg bn_IN bs ca
+                        +--------------------------------------------------+
+     a2ps               |                       []                      [] |
+     aegis              |                                                  |
+     ant-phone          |                                                  |
+     anubis             |                                                  |
+     aspell             |                []                             [] |
+     bash               |                                                  |
+     bfd                |                                                  |
+     bibshelf           |                []                                |
+     binutils           |                                                  |
+     bison              |                                                  |
+     bison-runtime      |                []                                |
+     bluez-pin          | []             []                                |
+     bombono-dvd        |                                                  |
+     buzztard           |                                                  |
+     cflow              |                                                  |
+     clisp              |                                                  |
+     coreutils          |                                   []          [] |
+     cpio               |                                                  |
+     cppi               |                                                  |
+     cpplib             |                                               [] |
+     cryptsetup         |                                                  |
+     dfarc              |                                                  |
+     dialog             |                             []                [] |
+     dico               |                                                  |
+     diffutils          |                                               [] |
+     dink               |                                                  |
+     doodle             |                                                  |
+     e2fsprogs          |                                               [] |
+     enscript           |                                               [] |
+     exif               |                                                  |
+     fetchmail          |                                               [] |
+     findutils          |                                   []             |
+     flex               |                                               [] |
+     freedink           |                                                  |
+     gas                |                                                  |
+     gawk               |                []                             [] |
+     gcal               |                                               [] |
+     gcc                |                                                  |
+     gettext-examples   | []             []                 []          [] |
+     gettext-runtime    |                                   []          [] |
+     gettext-tools      |                                   []          [] |
+     gip                |                                   []             |
+     gjay               |                                                  |
+     gliv               |                                   []             |
+     glunarclock        |                []                 []             |
+     gnubiff            |                                                  |
+     gnucash            |                                               [] |
+     gnuedu             |                                                  |
+     gnulib             |                                                  |
+     gnunet             |                                                  |
+     gnunet-gtk         |                                                  |
+     gnutls             |                                                  |
+     gold               |                                                  |
+     gpe-aerial         |                                                  |
+     gpe-beam           |                                                  |
+     gpe-bluetooth      |                                                  |
+     gpe-calendar       |                                                  |
+     gpe-clock          |                []                                |
+     gpe-conf           |                                                  |
+     gpe-contacts       |                                                  |
+     gpe-edit           |                                                  |
+     gpe-filemanager    |                                                  |
+     gpe-go             |                                                  |
+     gpe-login          |                                                  |
+     gpe-ownerinfo      |                []                                |
+     gpe-package        |                                                  |
+     gpe-sketchbook     |                                                  |
+     gpe-su             |                []                                |
+     gpe-taskmanager    |                []                                |
+     gpe-timesheet      |                []                                |
+     gpe-today          |                []                                |
+     gpe-todo           |                                                  |
+     gphoto2            |                                                  |
+     gprof              |                                   []             |
+     gpsdrive           |                                                  |
+     gramadoir          |                                                  |
+     grep               |                                                  |
+     grub               |                []                             [] |
+     gsasl              |                                                  |
+     gss                |                                                  |
+     gst-plugins-bad    |                                   []             |
+     gst-plugins-base   |                                   []             |
+     gst-plugins-good   |                                   []             |
+     gst-plugins-ugly   |                                   []             |
+     gstreamer          | []                                []          [] |
+     gtick              |                                                  |
+     gtkam              |                       []                         |
+     gtkorphan          |                                   []             |
+     gtkspell           | []             []     []                         |
+     gutenprint         |                                                  |
+     hello              |                                   []             |
+     help2man           |                                                  |
+     hylafax            |                                                  |
+     idutils            |                                                  |
+     indent             |                                   []          [] |
+     iso_15924          |                                                  |
+     iso_3166           | []          []        []          []  []   [] [] |
+     iso_3166_2         |                                                  |
+     iso_4217           |                                                  |
+     iso_639            |             [] []     []              []         |
+     iso_639_3          |                                                  |
+     jwhois             |                                                  |
+     kbd                |                                                  |
+     keytouch           |                                               [] |
+     keytouch-editor    |                                                  |
+     keytouch-keyboa... |                                               [] |
+     klavaro            |          []                                      |
+     latrine            |                                                  |
+     ld                 |                                   []             |
+     leafpad            |                                   []          [] |
+     libc               |                                   []          [] |
+     libexif            |                       ()                         |
+     libextractor       |                                                  |
+     libgnutls          |                                                  |
+     libgpewidget       |                                                  |
+     libgpg-error       |                                                  |
+     libgphoto2         |                                                  |
+     libgphoto2_port    |                                                  |
+     libgsasl           |                                                  |
+     libiconv           |                                   []             |
+     libidn             |                                                  |
+     lifelines          |                                                  |
+     liferea            |                             []                [] |
+     lilypond           |                                                  |
+     linkdr             |          []                                      |
+     lordsawar          |                                                  |
+     lprng              |                                                  |
+     lynx               |                                               [] |
+     m4                 |                                                  |
+     mailfromd          |                                                  |
+     mailutils          |                                                  |
+     make               |                                                  |
+     man-db             |                                                  |
+     man-db-manpages    |                                                  |
+     minicom            |                                                  |
+     mkisofs            |                                                  |
+     myserver           |                                                  |
+     nano               |                                   []          [] |
+     opcodes            |                                                  |
+     parted             |                                                  |
+     pies               |                                                  |
+     popt               |                                                  |
+     psmisc             |                                                  |
+     pspp               |                                               [] |
+     pwdutils           |                                                  |
+     radius             |                                               [] |
+     recode             |                       []                      [] |
+     rosegarden         |                                                  |
+     rpm                |                                                  |
+     rush               |                                                  |
+     sarg               |                                                  |
+     screem             |                                                  |
+     scrollkeeper       |                    [] []                      [] |
+     sed                |                []                             [] |
+     sharutils          |                                   []          [] |
+     shishi             |                                                  |
+     skencil            |                                                  |
+     solfege            |                                                  |
+     solfege-manual     |                                                  |
+     soundtracker       |                                                  |
+     sp                 |                                                  |
+     sysstat            |                                                  |
+     tar                |                                   []             |
+     texinfo            |                                                  |
+     tin                |                                                  |
+     unicode-han-tra... |                                                  |
+     unicode-transla... |                                                  |
+     util-linux-ng      |                                               [] |
+     vice               |                                                  |
+     vmm                |                                                  |
+     vorbis-tools       |                                                  |
+     wastesedge         |                                                  |
+     wdiff              |                                                  |
+     wget               |                       []                      [] |
+     wyslij-po          |                                                  |
+     xchat              |                []     []          []          [] |
+     xdg-user-dirs      | []    []    [] []     []    []    []  []      [] |
+     xkeyboard-config   |                                   []          [] |
+                        +--------------------------------------------------+
+                          af am an ar as ast az be be@latin bg bn_IN bs ca
+                           6  0  1  2  3 19   1 10     3    28   3    1 38
+
+                          crh cs da  de  el en en_GB en_ZA eo es et eu fa
+                        +-------------------------------------------------+
+     a2ps               |     [] []  []  []     []            [] []       |
+     aegis              |        []  []                       []          |
+     ant-phone          |        []  ()                                   |
+     anubis             |        []  []                                   |
+     aspell             |     [] []  []         []            []          |
+     bash               |     []                           [] []          |
+     bfd                |                                     []          |
+     bibshelf           |        []  []                       []          |
+     binutils           |                                     []          |
+     bison              |            []  []                               |
+     bison-runtime      |        []  []  []                      []       |
+     bluez-pin          |     [] []  []  []                [] []          |
+     bombono-dvd        |        []                                       |
+     buzztard           |     [] []  []                                   |
+     cflow              |        []  []                                   |
+     clisp              |        []  []     []                []          |
+     coreutils          |     [] []  []                          []       |
+     cpio               |                                                 |
+     cppi               |                                                 |
+     cpplib             |        []  []                       []          |
+     cryptsetup         |            []                                   |
+     dfarc              |        []  []                       []          |
+     dialog             |        []  []                    [] []    []    |
+     dico               |                                                 |
+     diffutils          |     [] []  []  []                [] []          |
+     dink               |        []  []                       []          |
+     doodle             |            []                                   |
+     e2fsprogs          |     []     []                       []          |
+     enscript           |        []  []         []                        |
+     exif               |     () []  []                                   |
+     fetchmail          |     [] []  ()  []     []            []          |
+     findutils          |     [] []  []                                   |
+     flex               |            []                       []          |
+     freedink           |        []  []                       []          |
+     gas                |                                     []          |
+     gawk               |        []  []                       []          |
+     gcal               |                                     []          |
+     gcc                |            []                       []          |
+     gettext-examples   |            []  []                [] []          |
+     gettext-runtime    |        []  []                    [] []          |
+     gettext-tools      |            []                       []    []    |
+     gip                |        []  []                       []    []    |
+     gjay               |            []                                   |
+     gliv               |     [] []  []                                   |
+     glunarclock        |        []  []                                   |
+     gnubiff            |            ()                                   |
+     gnucash            |     []     ()  ()     ()            ()          |
+     gnuedu             |        []                           []          |
+     gnulib             |            []                       []          |
+     gnunet             |                                                 |
+     gnunet-gtk         |        []                                       |
+     gnutls             |     []     []                                   |
+     gold               |                                     []          |
+     gpe-aerial         |     [] []  []                       []          |
+     gpe-beam           |     [] []  []                       []          |
+     gpe-bluetooth      |        []  []                                   |
+     gpe-calendar       |        []                                       |
+     gpe-clock          |     [] []  []                       []          |
+     gpe-conf           |     [] []  []                                   |
+     gpe-contacts       |        []  []                       []          |
+     gpe-edit           |        []  []                                   |
+     gpe-filemanager    |        []  []                       []          |
+     gpe-go             |     [] []  []                       []          |
+     gpe-login          |        []  []                                   |
+     gpe-ownerinfo      |     [] []  []                       []          |
+     gpe-package        |        []  []                       []          |
+     gpe-sketchbook     |     [] []  []                       []          |
+     gpe-su             |     [] []  []                       []          |
+     gpe-taskmanager    |     [] []  []                       []          |
+     gpe-timesheet      |     [] []  []                       []          |
+     gpe-today          |     [] []  []                       []          |
+     gpe-todo           |        []  []                       []          |
+     gphoto2            |     [] []  ()         []            []    []    |
+     gprof              |        []  []                       []          |
+     gpsdrive           |        []                           [] []       |
+     gramadoir          |        []  []                    []             |
+     grep               |     []                                          |
+     grub               |        []  []                                   |
+     gsasl              |            []                                   |
+     gss                |                                                 |
+     gst-plugins-bad    |     [] []  []                       []    []    |
+     gst-plugins-base   |     [] []  []                       []    []    |
+     gst-plugins-good   |     [] []  []  []                   []    []    |
+     gst-plugins-ugly   |     [] []  []  []                   []    []    |
+     gstreamer          |     [] []  []                       []    []    |
+     gtick              |        []  ()                    []             |
+     gtkam              |     [] []  ()                    [] []          |
+     gtkorphan          |     [] []  []                    []             |
+     gtkspell           |     [] []  []  []                [] []    []    |
+     gutenprint         |        []  []         []                        |
+     hello              |        []  []                    [] []          |
+     help2man           |            []                                   |
+     hylafax            |            []                       []          |
+     idutils            |        []  []                                   |
+     indent             |     [] []  []                    [] [] [] []    |
+     iso_15924          |        []      ()                [] []          |
+     iso_3166           | []  [] []  []  ()                [] [] [] ()    |
+     iso_3166_2         |                ()                               |
+     iso_4217           |     [] []  []  ()                   [] []       |
+     iso_639            | []  [] []  []  ()                [] []          |
+     iso_639_3          | []                                              |
+     jwhois             |                                     []          |
+     kbd                |     [] []  []  []                   []          |
+     keytouch           |        []  []                                   |
+     keytouch-editor    |        []  []                                   |
+     keytouch-keyboa... |        []                                       |
+     klavaro            |     [] []  []                    []             |
+     latrine            |        []  ()                                   |
+     ld                 |        []                           []          |
+     leafpad            |     [] []  []  []                   []    []    |
+     libc               |     [] []  []                       []          |
+     libexif            |        []  []         ()                        |
+     libextractor       |                                                 |
+     libgnutls          |     []                                          |
+     libgpewidget       |        []  []                                   |
+     libgpg-error       |     []     []                                   |
+     libgphoto2         |        []  ()                                   |
+     libgphoto2_port    |        []  ()                             []    |
+     libgsasl           |                                                 |
+     libiconv           |     [] []  []                    []    []       |
+     libidn             |     []     []                    []             |
+     lifelines          |        []  ()                                   |
+     liferea            |     []     []  []                   []    []    |
+     lilypond           |     []     []                       []          |
+     linkdr             |        []  []                       []          |
+     lordsawar          |        []                                       |
+     lprng              |                                                 |
+     lynx               |     [] []  []                          []       |
+     m4                 |     [] []  []  []                               |
+     mailfromd          |                                                 |
+     mailutils          |                                     []          |
+     make               |        []  []                       []          |
+     man-db             |                                                 |
+     man-db-manpages    |                                                 |
+     minicom            |     [] []  []                       []          |
+     mkisofs            |                                                 |
+     myserver           |                                                 |
+     nano               |            []                       []    []    |
+     opcodes            |            []                       []          |
+     parted             |     []     []                                   |
+     pies               |                                                 |
+     popt               |     [] []  []                    [] []          |
+     psmisc             |     []     []                             []    |
+     pspp               |                                     []          |
+     pwdutils           |        []                                       |
+     radius             |                                     []          |
+     recode             |     [] []  []  []                [] []          |
+     rosegarden         |     ()     ()                       ()          |
+     rpm                |        []  []                       []          |
+     rush               |                                                 |
+     sarg               |                                                 |
+     screem             |                                                 |
+     scrollkeeper       |     [] []  []         []            []          |
+     sed                |     []     []  []                [] [] []       |
+     sharutils          |        []  []                       [] []       |
+     shishi             |                                                 |
+     skencil            |        []  ()                       []          |
+     solfege            |            []                    []    []       |
+     solfege-manual     |                                  []    []       |
+     soundtracker       |        []  []                       []          |
+     sp                 |            []                                   |
+     sysstat            |        []  []                             []    |
+     tar                |     []     []                          [] []    |
+     texinfo            |            []                    [] []          |
+     tin                |            []                          []       |
+     unicode-han-tra... |                                                 |
+     unicode-transla... |                                                 |
+     util-linux-ng      |     [] []  []                       []          |
+     vice               |        ()  ()                                   |
+     vmm                |            []                                   |
+     vorbis-tools       |     []                           []             |
+     wastesedge         |        []                                       |
+     wdiff              |            []                       []          |
+     wget               |     []     []                          []       |
+     wyslij-po          |                                                 |
+     xchat              |     []     []  []                   [] []       |
+     xdg-user-dirs      | []  [] []  []  []                [] [] [] []    |
+     xkeyboard-config   | []  [] []  []                    [] []          |
+                        +-------------------------------------------------+
+                          crh cs da  de  el en en_GB en_ZA eo es et eu fa
+                           5  64 105 117 18  1   8     0   28 89 18 19  0
+
+                          fi  fr  ga gl gu he hi hr hu hy id  is it ja ka kn
+                        +----------------------------------------------------+
+     a2ps               | []  []                          []        []       |
+     aegis              |     []                                 []          |
+     ant-phone          |     []                                 []          |
+     anubis             | []  []                          []     []          |
+     aspell             |     []  []                      []     []          |
+     bash               | []  []                          []        []       |
+     bfd                | []  []                          []                 |
+     bibshelf           | []  []  []                      []     []          |
+     binutils           | []  []                          []                 |
+     bison              | []  []  []                      []                 |
+     bison-runtime      | []  []  []                      []     [] []       |
+     bluez-pin          | []  []  []                [] [] []  []    []       |
+     bombono-dvd        | []                                                 |
+     buzztard           |                                 []                 |
+     cflow              | []      []                      []                 |
+     clisp              |     []                                             |
+     coreutils          |     []  []                []    []     []          |
+     cpio               | []  []  []                      []                 |
+     cppi               | []  []                                             |
+     cpplib             | []  []                          []                 |
+     cryptsetup         |     []                          []     []          |
+     dfarc              | []  []                                 []          |
+     dialog             |     []  [] []                   []  [] [] []       |
+     dico               |                                                    |
+     diffutils          | []  []  [] []    []       []    []     [] []       |
+     dink               |     []                                             |
+     doodle             |         []                             []          |
+     e2fsprogs          |     []                          []                 |
+     enscript           |     []  []             []       []                 |
+     exif               | []  []                          []  [] [] []       |
+     fetchmail          |     []                          []     [] []       |
+     findutils          | []  []  []                []    []     []          |
+     flex               | []  []  []                                         |
+     freedink           | []  []                          []                 |
+     gas                |     []                          []                 |
+     gawk               |     []  []       []             []     () []       |
+     gcal               |     []                                             |
+     gcc                |                                 []                 |
+     gettext-examples   | []  []  []                []    []     [] []       |
+     gettext-runtime    | []  []  []                      []     [] []       |
+     gettext-tools      |     []                          []     [] []       |
+     gip                | []  []  [] []                   []        []       |
+     gjay               | []                                                 |
+     gliv               | []  ()                                             |
+     glunarclock        | []      []                []    []                 |
+     gnubiff            |     ()                          []     ()          |
+     gnucash            | ()  ()           ()       ()           () []       |
+     gnuedu             |     []                                 []          |
+     gnulib             | []  []  []                []           [] []       |
+     gnunet             |                                                    |
+     gnunet-gtk         |     []                                             |
+     gnutls             |     []                                 []          |
+     gold               | []                              []                 |
+     gpe-aerial         | []  []                          []                 |
+     gpe-beam           | []  []                          []        []       |
+     gpe-bluetooth      | []                              []     [] []       |
+     gpe-calendar       | []                                        []       |
+     gpe-clock          | []  []                    []    []        []       |
+     gpe-conf           | []  []                          []        []       |
+     gpe-contacts       | []  []                          []        []       |
+     gpe-edit           | []                              []        []       |
+     gpe-filemanager    | []                        []    []        []       |
+     gpe-go             | []  []                    []    []        []       |
+     gpe-login          | []                              []        []       |
+     gpe-ownerinfo      | []  []                    []    []        []       |
+     gpe-package        | []                              []        []       |
+     gpe-sketchbook     | []  []                          []        []       |
+     gpe-su             | []  []     []             []    []        []       |
+     gpe-taskmanager    | []  []                    []    []        []       |
+     gpe-timesheet      | []  []  []                      []        []       |
+     gpe-today          | []  []  [] []             []    []        []       |
+     gpe-todo           | []                              []        []       |
+     gphoto2            | []  []                    []    []     [] []       |
+     gprof              | []  []  []                      []                 |
+     gpsdrive           |            []                   []     []          |
+     gramadoir          |     []  []                      []                 |
+     grep               | []                                     []          |
+     grub               | []                        []    []     []          |
+     gsasl              | []  []  []                      []     []          |
+     gss                | []  []  []                      []     []          |
+     gst-plugins-bad    | []  []                    []    []     [] []       |
+     gst-plugins-base   | []  []                    []    []     [] []       |
+     gst-plugins-good   | []  []                    []    []     [] []       |
+     gst-plugins-ugly   | []  []                    []    []     [] []       |
+     gstreamer          | []  []                    []    []     []          |
+     gtick              | []  []  []                      []     []          |
+     gtkam              |     []                    []    []     [] []       |
+     gtkorphan          |     []                          []     []          |
+     gtkspell           | []  []  [] []             [] [] []     [] []       |
+     gutenprint         | []  []                    []           []          |
+     hello              | []      []                      []                 |
+     help2man           | []  []                                             |
+     hylafax            |                                 []                 |
+     idutils            | []  []  []                []    []     []          |
+     indent             | []  []  [] []             []    []     [] []       |
+     iso_15924          | []  ()                          []     []          |
+     iso_3166           | []  ()  [] [] [] [] [] [] []    []     [] []       |
+     iso_3166_2         |     ()                    []    []     []          |
+     iso_4217           | []  ()                    []    []     [] []       |
+     iso_639            | []  ()  []    []          []    []     [] []    [] |
+     iso_639_3          |     ()                                 []       [] |
+     jwhois             | []  []                    []    []     []          |
+     kbd                |     []                          []                 |
+     keytouch           | []  []  []                []    []     []          |
+     keytouch-editor    | []      []                []    []     []          |
+     keytouch-keyboa... | []      []                []    []     []          |
+     klavaro            |            []             []                       |
+     latrine            | []                              []     []          |
+     ld                 | []  []  []                      []                 |
+     leafpad            | []  []  []       []       []    []     [] ()       |
+     libc               | []  []     []                   []        []       |
+     libexif            |                                        []          |
+     libextractor       |                                                    |
+     libgnutls          |     []                                 []          |
+     libgpewidget       | []      []                      []        []       |
+     libgpg-error       |     []                                 []          |
+     libgphoto2         |     []                                 [] []       |
+     libgphoto2_port    |     []                                 [] []       |
+     libgsasl           | []  []  []                      []     []          |
+     libiconv           | []  []  []                      []     [] []       |
+     libidn             | []  []                          []     []          |
+     lifelines          |     ()                                             |
+     liferea            |     []                    []           [] []       |
+     lilypond           | []  []                                             |
+     linkdr             | []               []    [] []           []          |
+     lordsawar          |                                                    |
+     lprng              |                                 []                 |
+     lynx               |     []                    []    []     [] []       |
+     m4                 | []  []  [] []                   []        []       |
+     mailfromd          |                                                    |
+     mailutils          |     []                          []                 |
+     make               | []  []  [] []    []    []       []     [] []       |
+     man-db             |                                 []     []          |
+     man-db-manpages    |                                 []                 |
+     minicom            | []  []                    []    []        []       |
+     mkisofs            | []  []                          []     []          |
+     myserver           |                                                    |
+     nano               | []  []  [] []             []           []          |
+     opcodes            | []  []  []                      []                 |
+     parted             |     []                          []     [] []       |
+     pies               |                                                    |
+     popt               | []  []  [] []             []    []  [] [] []       |
+     psmisc             | []  []                          []                 |
+     pspp               |                                                    |
+     pwdutils           |     []                          []                 |
+     radius             |     []                          []                 |
+     recode             | []  []  [] []    []       []    []     []          |
+     rosegarden         | ()  ()                          ()     () ()       |
+     rpm                |                                 []        []       |
+     rush               |                                                    |
+     sarg               |     []                                             |
+     screem             |                                        [] []       |
+     scrollkeeper       | []                        []    []     []          |
+     sed                | []  []  [] []             []    []     [] []       |
+     sharutils          | []  []  []                []    []     [] []       |
+     shishi             |     []                                             |
+     skencil            |     []                                             |
+     solfege            | []  []     []                          []          |
+     solfege-manual     |     []     []                                      |
+     soundtracker       |     []                                 []          |
+     sp                 |     []                                    ()       |
+     sysstat            | []  []                          []     [] []       |
+     tar                | []  []  []                []    []     [] []       |
+     texinfo            |     []                          []     [] []       |
+     tin                |     []                                             |
+     unicode-han-tra... |                                                    |
+     unicode-transla... |     []  []                                         |
+     util-linux-ng      | []  []                    []    []     [] []       |
+     vice               |     ()                    ()           ()          |
+     vmm                |     []                                             |
+     vorbis-tools       |                                 []                 |
+     wastesedge         |     ()                                 ()          |
+     wdiff              | []                                                 |
+     wget               | []  []  []             [] []    []     [] []       |
+     wyslij-po          | []  []                          []                 |
+     xchat              | []  []        []    []    []    []     [] []    [] |
+     xdg-user-dirs      | []  []  [] [] [] [] []    []    []  [] [] []    [] |
+     xkeyboard-config   | []  []                    []    []     []          |
+                        +----------------------------------------------------+
+                          fi  fr  ga gl gu he hi hr hu hy id  is it ja ka kn
+                          105 121 53 20  4  8  3  5 53  2 120  5 84 67  0  4
+
+                          ko ku ky lg lt lv mk ml mn mr ms mt nb nds ne
+                        +-----------------------------------------------+
+     a2ps               |                               []              |
+     aegis              |                                               |
+     ant-phone          |                                               |
+     anubis             |                               []    []        |
+     aspell             |                         []                    |
+     bash               |                                               |
+     bfd                |                                               |
+     bibshelf           |                []             []              |
+     binutils           |                                               |
+     bison              |                               []              |
+     bison-runtime      |       []    [] []             []    []        |
+     bluez-pin          |    [] []    [] []             []              |
+     bombono-dvd        |                                               |
+     buzztard           |                                               |
+     cflow              |                                               |
+     clisp              |                                               |
+     coreutils          |          []                                   |
+     cpio               |                                               |
+     cppi               |                                               |
+     cpplib             |                                               |
+     cryptsetup         |                                               |
+     dfarc              |                   []                          |
+     dialog             |    []       [] []             []    []        |
+     dico               |                                               |
+     diffutils          |                []             []              |
+     dink               |                                               |
+     doodle             |                                               |
+     e2fsprogs          |                                               |
+     enscript           |                                               |
+     exif               |                []                             |
+     fetchmail          |                                               |
+     findutils          |                                               |
+     flex               |                                               |
+     freedink           |                                     []        |
+     gas                |                                               |
+     gawk               |                                               |
+     gcal               |                                               |
+     gcc                |                                               |
+     gettext-examples   |       []       []             [] []           |
+     gettext-runtime    | []                                            |
+     gettext-tools      | []                                            |
+     gip                |                []             []              |
+     gjay               |                                               |
+     gliv               |                                               |
+     glunarclock        |                []                             |
+     gnubiff            |                                               |
+     gnucash            | ()          ()                      ()     () |
+     gnuedu             |                                               |
+     gnulib             |                                               |
+     gnunet             |                                               |
+     gnunet-gtk         |                                               |
+     gnutls             |                               []              |
+     gold               |                                               |
+     gpe-aerial         |                []                             |
+     gpe-beam           |                []                             |
+     gpe-bluetooth      |                []                []           |
+     gpe-calendar       |                []                             |
+     gpe-clock          | []    []       []             [] []           |
+     gpe-conf           | []             []                             |
+     gpe-contacts       | []             []                             |
+     gpe-edit           |                []                             |
+     gpe-filemanager    | []             []                             |
+     gpe-go             | []             []                []           |
+     gpe-login          |                []                             |
+     gpe-ownerinfo      |                []             []              |
+     gpe-package        | []             []                             |
+     gpe-sketchbook     | []             []                             |
+     gpe-su             | []    []       []             [] [] []        |
+     gpe-taskmanager    | [] [] []       []             [] []           |
+     gpe-timesheet      |                []             []              |
+     gpe-today          |       []       []             [] []           |
+     gpe-todo           |                []                   []        |
+     gphoto2            |                                               |
+     gprof              |                               []              |
+     gpsdrive           |                                               |
+     gramadoir          |                                               |
+     grep               |                                               |
+     grub               |                                               |
+     gsasl              |                                               |
+     gss                |                                               |
+     gst-plugins-bad    |             [] []                [] []        |
+     gst-plugins-base   |             [] []                             |
+     gst-plugins-good   |                []                []           |
+     gst-plugins-ugly   |             [] []             [] [] []        |
+     gstreamer          |                                               |
+     gtick              |                                               |
+     gtkam              |                                     []        |
+     gtkorphan          |                []                      []     |
+     gtkspell           |       []    [] []       []    []    [] []     |
+     gutenprint         |                                               |
+     hello              | []             []             []              |
+     help2man           |                                               |
+     hylafax            |                                               |
+     idutils            |                                               |
+     indent             |                                               |
+     iso_15924          |             [] []                             |
+     iso_3166           | [] []       () [] [] []    []       []        |
+     iso_3166_2         |                                               |
+     iso_4217           |             []                      []        |
+     iso_639            |                      []    []                 |
+     iso_639_3          |                            []                 |
+     jwhois             |                []                             |
+     kbd                |                                               |
+     keytouch           |                []                             |
+     keytouch-editor    |                []                             |
+     keytouch-keyboa... |                []                             |
+     klavaro            |                                     []        |
+     latrine            |                []                             |
+     ld                 |                                               |
+     leafpad            | []          [] []                             |
+     libc               | []                                            |
+     libexif            |                                               |
+     libextractor       |                                               |
+     libgnutls          |                               []              |
+     libgpewidget       |                []             []              |
+     libgpg-error       |                                               |
+     libgphoto2         |                                               |
+     libgphoto2_port    |                                               |
+     libgsasl           |                                               |
+     libiconv           |                                               |
+     libidn             |                                               |
+     lifelines          |                                               |
+     liferea            |                                               |
+     lilypond           |                                               |
+     linkdr             |                                               |
+     lordsawar          |                                               |
+     lprng              |                                               |
+     lynx               |                                               |
+     m4                 |                                               |
+     mailfromd          |                                               |
+     mailutils          |                                               |
+     make               | []                                            |
+     man-db             |                                               |
+     man-db-manpages    |                                               |
+     minicom            |                                     []        |
+     mkisofs            |                                               |
+     myserver           |                                               |
+     nano               |                               []    []        |
+     opcodes            |                                               |
+     parted             |                                               |
+     pies               |                                               |
+     popt               | []             []                   []        |
+     psmisc             |                                               |
+     pspp               |                                               |
+     pwdutils           |                                               |
+     radius             |                                               |
+     recode             |                                               |
+     rosegarden         |                                               |
+     rpm                |                                               |
+     rush               |                                               |
+     sarg               |                                               |
+     screem             |                                               |
+     scrollkeeper       |                                     []     [] |
+     sed                |                                               |
+     sharutils          |                                               |
+     shishi             |                                               |
+     skencil            |                                               |
+     solfege            |                                     []        |
+     solfege-manual     |                                               |
+     soundtracker       |                                               |
+     sp                 |                                               |
+     sysstat            |                []                             |
+     tar                |       []                                      |
+     texinfo            |                                     []        |
+     tin                |                                               |
+     unicode-han-tra... |                                               |
+     unicode-transla... |                                               |
+     util-linux-ng      |                                               |
+     vice               |                                               |
+     vmm                |                                               |
+     vorbis-tools       |                                               |
+     wastesedge         |                                               |
+     wdiff              |                                               |
+     wget               |             []                                |
+     wyslij-po          |                                               |
+     xchat              | []             [] []                          |
+     xdg-user-dirs      | [] []       [] [] []       []       [] []     |
+     xkeyboard-config   | []    []    []                                |
+                        +-----------------------------------------------+
+                          ko ku ky lg lt lv mk ml mn mr ms mt nb nds ne
+                          20  5 10  1 13 48  4  2  2  4 24 10 20  3   1
+
+                          nl  nn or pa pl  ps pt pt_BR ro ru rw sk sl sq sr
+                        +---------------------------------------------------+
+     a2ps               | []           []     []  []   [] []       []    [] |
+     aegis              | []                      []      []                |
+     ant-phone          |                         []   []                   |
+     anubis             | []           []                 []                |
+     aspell             | []                           [] []    [] []       |
+     bash               | []                                    []          |
+     bfd                |                                 []                |
+     bibshelf           | []  []                                            |
+     binutils           |                                 []    []          |
+     bison              | []           []                 []                |
+     bison-runtime      | []           []     []  []   [] []       []       |
+     bluez-pin          | []           []         []   [] []    [] []    [] |
+     bombono-dvd        |     []                          ()                |
+     buzztard           | []  []                                            |
+     cflow              |              []                                   |
+     clisp              | []                              []                |
+     coreutils          | []           []     []  []      []       []       |
+     cpio               | []           []                 []                |
+     cppi               |              []                                   |
+     cpplib             | []                                                |
+     cryptsetup         | []                                                |
+     dfarc              |              []                                   |
+     dialog             | []           []         []      []                |
+     dico               |              []                                   |
+     diffutils          | []           []         []   [] []             [] |
+     dink               | ()                                                |
+     doodle             | []                                          []    |
+     e2fsprogs          | []           []                                   |
+     enscript           | []                      []   [] []       []       |
+     exif               | []           []              [] ()    []          |
+     fetchmail          | []           []                 []          []    |
+     findutils          | []           []     []          []       []       |
+     flex               | []           []         []   [] []                |
+     freedink           | []           []                                   |
+     gas                |                                                   |
+     gawk               | []           []         []   []                   |
+     gcal               |                                                   |
+     gcc                |                                                [] |
+     gettext-examples   | []           []     []       [] []    [] []    [] |
+     gettext-runtime    | []  []       []     []       [] []    [] []    [] |
+     gettext-tools      |              []              [] []    [] []    [] |
+     gip                | []           []                 []    []       [] |
+     gjay               |                                                   |
+     gliv               | []           []         []   [] []    []          |
+     glunarclock        | []                      []   []       []       [] |
+     gnubiff            | []                           ()                   |
+     gnucash            | []           ()         ()      ()                |
+     gnuedu             | []                                                |
+     gnulib             | []           []                 []       []       |
+     gnunet             |                                                   |
+     gnunet-gtk         |                                                   |
+     gnutls             | []           []                                   |
+     gold               |                                                   |
+     gpe-aerial         | []                  []  []   [] []       []    [] |
+     gpe-beam           | []                  []  []   [] []       []    [] |
+     gpe-bluetooth      | []                      []                        |
+     gpe-calendar       |                         []      []       []    [] |
+     gpe-clock          | []                  []  []   [] []    [] []    [] |
+     gpe-conf           | []                  []  []   [] []    [] []       |
+     gpe-contacts       |                         []   [] []       []    [] |
+     gpe-edit           | []           []                          []       |
+     gpe-filemanager    | []                              []       []       |
+     gpe-go             | []           []         []   [] []    [] []    [] |
+     gpe-login          | []                      []                        |
+     gpe-ownerinfo      | []                  []  []   [] []    [] []    [] |
+     gpe-package        | []                                       []       |
+     gpe-sketchbook     | []                  []  []   [] []       []    [] |
+     gpe-su             | []                  []  []   [] []    [] []    [] |
+     gpe-taskmanager    | []                  []  []   [] []    [] []    [] |
+     gpe-timesheet      | []                  []  []   [] []    [] []    [] |
+     gpe-today          | []                  []  []   [] []    [] []    [] |
+     gpe-todo           | []                      []      []       []    [] |
+     gphoto2            | []        [] []         []   [] []    []       [] |
+     gprof              | []                      []   []                   |
+     gpsdrive           | []                              []                |
+     gramadoir          | []                                    []          |
+     grep               | []           []                 []    []          |
+     grub               | []           []                 []                |
+     gsasl              | []           []                       []       [] |
+     gss                |              []              []       []          |
+     gst-plugins-bad    | []           []         []      []    []    []    |
+     gst-plugins-base   | []           []         []      []    []          |
+     gst-plugins-good   | []           []         []      []    []          |
+     gst-plugins-ugly   | []           []         []      []    [] []       |
+     gstreamer          | []           []         []      []    []          |
+     gtick              | []                              []    []          |
+     gtkam              | []        [] []         []      []    []          |
+     gtkorphan          | []                                                |
+     gtkspell           | []           []     []  []   [] []    [] [] [] [] |
+     gutenprint         | []                              []                |
+     hello              | []           []                       [] []       |
+     help2man           |              []                 []                |
+     hylafax            | []                                                |
+     idutils            | []           []         []   [] []                |
+     indent             | []           []         []   [] []    []       [] |
+     iso_15924          | []           []                 []       []       |
+     iso_3166           | []  [] [] [] []     ()  []   [] [] [] [] [] [] [] |
+     iso_3166_2         | []           []                          []       |
+     iso_4217           | []  []       []     []          [] []    []    [] |
+     iso_639            | []     [] [] []                 [] [] [] []    [] |
+     iso_639_3          |        [] []                                      |
+     jwhois             | []           []         []   []                   |
+     kbd                | []           []              []                   |
+     keytouch           | []           []                       []          |
+     keytouch-editor    | []           []                       []          |
+     keytouch-keyboa... | []           []                       []          |
+     klavaro            | []                      []                        |
+     latrine            |              []                 []                |
+     ld                 |                                                   |
+     leafpad            | []  []       []     []  []      []    [] []    [] |
+     libc               | []           []                 []    []          |
+     libexif            | []           []         ()            []          |
+     libextractor       |                                                   |
+     libgnutls          | []           []                                   |
+     libgpewidget       | []           []                          []       |
+     libgpg-error       |              []              []                   |
+     libgphoto2         | []           []                                   |
+     libgphoto2_port    | []           []         []      []    []          |
+     libgsasl           | []           []              []       []       [] |
+     libiconv           | []           []                       [] []    [] |
+     libidn             | []           []                                   |
+     lifelines          | []           []                                   |
+     liferea            | []           []     []  []   [] ()    ()    []    |
+     lilypond           | []                                                |
+     linkdr             | []                  []          []                |
+     lordsawar          |                                                   |
+     lprng              |              []                                   |
+     lynx               | []                      []      []                |
+     m4                 | []           []         []   [] []                |
+     mailfromd          |              []                                   |
+     mailutils          |              []                                   |
+     make               | []           []         []      []                |
+     man-db             | []           []                 []                |
+     man-db-manpages    | []           []                 []                |
+     minicom            |              []         []   [] []                |
+     mkisofs            | []           []                 []                |
+     myserver           |                                                   |
+     nano               | []           []         []      []                |
+     opcodes            | []                           []                   |
+     parted             | []           []                 []    []          |
+     pies               |              []                                   |
+     popt               | []           []     []          []                |
+     psmisc             | []           []                 []                |
+     pspp               | []                      []                        |
+     pwdutils           |              []                                   |
+     radius             | []           []                 []                |
+     recode             | []           []     []  []   [] []    [] []       |
+     rosegarden         |              ()                 ()                |
+     rpm                | []           []     []                            |
+     rush               | []           []                                   |
+     sarg               |                                                   |
+     screem             |                                                   |
+     scrollkeeper       | []  []       []              [] []    []    [] [] |
+     sed                | []           []     []  []   [] []    [] []    [] |
+     sharutils          | []           []                 []             [] |
+     shishi             |              []                                   |
+     skencil            |                     []  []                        |
+     solfege            | []           []         []      []                |
+     solfege-manual     | []           []         []                        |
+     soundtracker       |                                       []          |
+     sp                 |                                                   |
+     sysstat            | []           []         []      []                |
+     tar                | []           []                 []       []       |
+     texinfo            | []           []              [] []                |
+     tin                |                                 []                |
+     unicode-han-tra... |                                                   |
+     unicode-transla... |                                                   |
+     util-linux-ng      | []           []         []      []       []       |
+     vice               | []                                                |
+     vmm                | []                                                |
+     vorbis-tools       | []           []                                   |
+     wastesedge         | []                                                |
+     wdiff              | []           []                                   |
+     wget               | []           []     []  []      []    [] []       |
+     wyslij-po          | []  []       []                                   |
+     xchat              | []        [] []     []          []    [] [] [] [] |
+     xdg-user-dirs      | []  [] [] [] []  [] []  []   [] []    [] [] [] [] |
+     xkeyboard-config   | []           []                 []                |
+                        +---------------------------------------------------+
+                          nl  nn or pa pl  ps pt pt_BR ro ru rw sk sl sq sr
+                          135 10  4  7 105  1 29  62   47 91  3 54 46  9 37
+
+                          sv  sw ta te tg th tr uk vi  wa zh_CN zh_HK zh_TW
+                        +---------------------------------------------------+
+     a2ps               | []              [] [] [] []                       | 27
+     aegis              |                          []                       |  9
+     ant-phone          | []                 []    []      []               |  9
+     anubis             | []                 [] [] []                       | 15
+     aspell             |                       [] []  []                   | 20
+     bash               | []                    [] []                       | 12
+     bfd                |                          []                       |  6
+     bibshelf           | []                       []      []               | 16
+     binutils           |                       [] []                       |  8
+     bison              | []                       []                       | 12
+     bison-runtime      | []              []    [] []      []          []   | 29
+     bluez-pin          | []              [] [] [] []  []  []          []   | 37
+     bombono-dvd        |                          []                       |  4
+     buzztard           |                          []                       |  7
+     cflow              |                       [] []      []               |  9
+     clisp              |                                                   | 10
+     coreutils          | []                    [] []      []               | 22
+     cpio               | []                 [] [] []      []          []   | 13
+     cppi               |                       [] []                       |  5
+     cpplib             | []                 [] [] []      []          []   | 14
+     cryptsetup         | []                       []                       |  7
+     dfarc              |                          []                       |  9
+     dialog             | []  []          []       []  []  []          []   | 30
+     dico               |                       []                          |  2
+     diffutils          | []                 [] [] []      []          []   | 30
+     dink               |                                                   |  4
+     doodle             | []                       []                       |  7
+     e2fsprogs          | []                 []    []                       | 11
+     enscript           | []                 [] [] []                       | 17
+     exif               | []                       []      []               | 16
+     fetchmail          |                    []    []      []               | 17
+     findutils          | []                 [] [] []      []               | 20
+     flex               | []                 []    []                  []   | 15
+     freedink           |                          []                       | 10
+     gas                |                    []                             |  4
+     gawk               | []                 []    []      []               | 18
+     gcal               | []                 []                             |  5
+     gcc                | []                 []            []               |  7
+     gettext-examples   | []                 [] [] []      []    []    []   | 34
+     gettext-runtime    | []                 [] [] []      []    []    []   | 29
+     gettext-tools      | []                 [] [] []      []          []   | 22
+     gip                | []                       []      []          []   | 22
+     gjay               |                          []                       |  3
+     gliv               | []                 []    []                       | 14
+     glunarclock        | []                       []  []  []          []   | 19
+     gnubiff            | []                       []                       |  4
+     gnucash            |                    () [] ()      []          ()   | 10
+     gnuedu             |                          []                  []   |  7
+     gnulib             | []                    [] []      []               | 16
+     gnunet             |                          []                       |  1
+     gnunet-gtk         | []                 []    []                       |  5
+     gnutls             | []                       []      []               | 10
+     gold               |                          []                       |  4
+     gpe-aerial         | []                       []      []               | 18
+     gpe-beam           | []                       []      []               | 19
+     gpe-bluetooth      | []                       []      []               | 13
+     gpe-calendar       | []                       []  []  []               | 12
+     gpe-clock          | []                 []    []  []  []               | 28
+     gpe-conf           | []                       []  []  []               | 20
+     gpe-contacts       | []                       []      []               | 17
+     gpe-edit           | []                       []      []               | 12
+     gpe-filemanager    | []                       []  []  []               | 16
+     gpe-go             | []                 []    []  []  []               | 25
+     gpe-login          | []                       []      []               | 11
+     gpe-ownerinfo      | []                 []    []      []          []   | 25
+     gpe-package        | []                       []      []               | 13
+     gpe-sketchbook     | []                       []      []               | 20
+     gpe-su             | []                 []    []  []  []               | 30
+     gpe-taskmanager    | []                 []    []  []  []               | 29
+     gpe-timesheet      | []                 []    []      []          []   | 25
+     gpe-today          | []                 []    []  []  []          []   | 30
+     gpe-todo           | []                       []  []  []               | 17
+     gphoto2            | []                    [] []      []          []   | 24
+     gprof              | []                 []    []                       | 15
+     gpsdrive           | []                       []      []               | 11
+     gramadoir          | []                       []      []               | 11
+     grep               |                 []       []      []               | 10
+     grub               | []                       []      []               | 14
+     gsasl              | []                       []      []          []   | 14
+     gss                | []                       []      []               | 11
+     gst-plugins-bad    | []                 []    []      []               | 26
+     gst-plugins-base   | []                 [] [] []      []               | 24
+     gst-plugins-good   | []                 []    []      []               | 24
+     gst-plugins-ugly   | []                 [] [] []      []               | 29
+     gstreamer          | []                    [] []      []               | 22
+     gtick              |                       [] []      []               | 13
+     gtkam              | []                       []      []               | 20
+     gtkorphan          | []                       []      []               | 14
+     gtkspell           | []              [] [] [] []  []  []    []    []   | 45
+     gutenprint         | []                                                | 10
+     hello              | []              [] []    []      []          []   | 21
+     help2man           | []                       []                       |  7
+     hylafax            |                          []                       |  5
+     idutils            | []                 []    []      []               | 17
+     indent             | []                 [] [] []      []          []   | 30
+     iso_15924          |                 ()    [] ()      []          []   | 16
+     iso_3166           | []        []    () [] [] ()  []  []    []    ()   | 53
+     iso_3166_2         |                 ()    [] ()      []               |  9
+     iso_4217           | []              () [] [] ()      []    []         | 26
+     iso_639            | []     [] []    ()    [] ()  []  []    []    []   | 38
+     iso_639_3          |        []                ()                       |  8
+     jwhois             | []                 []    []      []          []   | 16
+     kbd                | []                 [] [] []      []               | 15
+     keytouch           | []                       []      []               | 16
+     keytouch-editor    | []                       []      []               | 14
+     keytouch-keyboa... | []                       []      []               | 14
+     klavaro            |                          []                       | 11
+     latrine            |                    []    []      []               | 10
+     ld                 | []                 []    []                  []   | 11
+     leafpad            | []                 [] [] []      []          []   | 33
+     libc               | []                 []    []      []          []   | 21
+     libexif            |                          []      ()               |  7
+     libextractor       |                          []                       |  1
+     libgnutls          | []                       []      []               |  9
+     libgpewidget       | []                       []      []               | 14
+     libgpg-error       | []                       []      []               |  9
+     libgphoto2         |                       [] []                       |  8
+     libgphoto2_port    | []                    [] []                  []   | 14
+     libgsasl           | []                       []      []               | 13
+     libiconv           | []                       []  []  []               | 21
+     libidn             | ()                       []      []               | 11
+     lifelines          | []                                                |  4
+     liferea            | []                 []            []               | 21
+     lilypond           |                          []                       |  7
+     linkdr             | []                 []    []      []          []   | 17
+     lordsawar          |                                                   |  1
+     lprng              |                          []                       |  3
+     lynx               | []                 [] [] []                       | 17
+     m4                 | []                       []      []          []   | 19
+     mailfromd          |                       [] []                       |  3
+     mailutils          |                          []                       |  5
+     make               | []                 []    []      []               | 21
+     man-db             | []                       []      []               |  8
+     man-db-manpages    |                                                   |  4
+     minicom            | []                       []                       | 16
+     mkisofs            |                          []      []               |  9
+     myserver           |                                                   |  0
+     nano               | []                       []      []          []   | 21
+     opcodes            | []                 []    []                       | 11
+     parted             | []                 [] [] []                  []   | 15
+     pies               |                       [] []                       |  3
+     popt               | []              [] []    []      []          []   | 27
+     psmisc             | []                       []                       | 11
+     pspp               |                                                   |  4
+     pwdutils           | []                       []                       |  6
+     radius             |                       [] []                       |  9
+     recode             | []                 []    []      []               | 28
+     rosegarden         | ()                                                |  0
+     rpm                | []                       []                  []   | 11
+     rush               |                       [] []                       |  4
+     sarg               |                                                   |  1
+     screem             |                          []                       |  3
+     scrollkeeper       | []                 [] [] []                  []   | 27
+     sed                | []                 []    []      []          []   | 30
+     sharutils          | []                 []    []      []          []   | 22
+     shishi             |                          []                       |  3
+     skencil            | []                       []                       |  7
+     solfege            | []                 []    []      []               | 16
+     solfege-manual     |                    []                             |  8
+     soundtracker       | []                 []    []                       |  9
+     sp                 |                    []                             |  3
+     sysstat            |                          []      []               | 15
+     tar                | []                 [] [] []      []          []   | 23
+     texinfo            | []                 [] [] []      []               | 17
+     tin                |                                                   |  4
+     unicode-han-tra... |                                                   |  0
+     unicode-transla... |                                                   |  2
+     util-linux-ng      | []                 [] [] []                       | 20
+     vice               | ()                 ()                             |  1
+     vmm                |                          []                       |  4
+     vorbis-tools       |                          []                       |  6
+     wastesedge         |                                                   |  2
+     wdiff              | []                       []                       |  7
+     wget               | []                 []    []      []          []   | 26
+     wyslij-po          |                       [] []                       |  8
+     xchat              | []              []    [] []      []          []   | 36
+     xdg-user-dirs      | []     [] []    [] [] [] []      []    []    []   | 63
+     xkeyboard-config   | []                    [] []                       | 22
+                        +---------------------------------------------------+
+       85 teams           sv  sw ta te tg th tr uk vi  wa zh_CN zh_HK zh_TW
+      178 domains         119  1  3  3  0 10 65 51 155 17  98     7    41    2618
+
+   Some counters in the preceding matrix are higher than the number of
+visible blocks let us expect.  This is because a few extra PO files are
+used for implementing regional variants of languages, or language
+dialects.
+
+   For a PO file in the matrix above to be effective, the package to
+which it applies should also have been internationalized and
+distributed as such by its maintainer.  There might be an observable
+lag between the mere existence a PO file and its wide availability in a
+distribution.
+
+   If June 2010 seems to be old, you may fetch a more recent copy of
+this `ABOUT-NLS' file on most GNU archive sites.  The most up-to-date
+matrix with full percentage details can be found at
+`http://translationproject.org/extra/matrix.html'.
+
+1.5 Using `gettext' in new packages
+===================================
+
+If you are writing a freely available program and want to
+internationalize it you are welcome to use GNU `gettext' in your
+package.  Of course you have to respect the GNU Library General Public
+License which covers the use of the GNU `gettext' library.  This means
+in particular that even non-free programs can use `libintl' as a shared
+library, whereas only free software can use `libintl' as a static
+library or use modified versions of `libintl'.
+
+   Once the sources are changed appropriately and the setup can handle
+the use of `gettext' the only thing missing are the translations.  The
+Free Translation Project is also available for packages which are not
+developed inside the GNU project.  Therefore the information given above
+applies also for every other Free Software Project.  Contact
+`coordinator@translationproject.org' to make the `.pot' files available
+to the translation teams.
+
diff --git a/src/grep/AUTHORS b/src/grep/AUTHORS
new file mode 100644
index 0000000..a4ce768
--- /dev/null
+++ b/src/grep/AUTHORS
@@ -0,0 +1,63 @@
+  Copyright (C) 1992, 1997-2002, 2004-2021 Free Software Foundation, Inc.
+
+  Copying and distribution of this file, with or without modification,
+  are permitted in any medium without royalty provided the copyright
+  notice and this notice are preserved.
+
+Mike Haertel wrote the main program and the dfa and kwset matchers.
+
+Isamu Hasegawa wrote the POSIX regular expression matcher, which is
+part of the GNU C Library and is distributed as part of GNU grep for
+use on non-GNU systems.  Ulrich Drepper, Paul Eggert, Paolo Bonzini,
+Stanislav Brabec, Assaf Gordon, Jakub Jelinek, Jim Meyering, Arnold
+Robbins, Andreas Schwab and Florian Weimer also contributed to this
+matcher.
+
+Arthur David Olson contributed the heuristics for finding fixed substrings
+at the end of dfa.c.
+
+Henry Spencer wrote the original test suite from which grep's was derived.
+Scott Anderson invented the Khadafy test.
+
+David MacKenzie wrote the automatic configuration software used to
+produce the configure script.
+
+Authors of the replacements for standard library routines are identified
+in the corresponding source files.
+
+The idea of using Boyer-Moore type algorithms to quickly filter out
+non-matching text before calling the regexp matcher was originally due
+to James Woods.  He also contributed some code to early versions of
+GNU grep.
+
+Mike Haertel would like to thank Andrew Hume for many fascinating
+discussions of string searching issues over the years.  Hume and
+Sunday's excellent paper on fast string searching describes some of
+the history of the subject, as well as providing exhaustive
+performance analysis of various implementation alternatives.
+The inner loop of GNU grep is similar to Hume & Sunday's recommended
+"Tuned Boyer Moore" inner loop.  See: Hume A, Sunday D.
+Fast string searching. Software Pract Exper. 1991;21(11):1221-48.
+https://doi.org/10.1002/spe.4380211105
+
+Arnold Robbins contributed to improve dfa.[ch]. In fact
+it came straight from gawk-3.0.3 with small editing and fixes.
+
+Many folks contributed.  See THANKS; if I omitted someone please
+send me email.
+
+Alain Magloire maintained GNU grep until version 2.5e.
+
+Bernhard "Bero" Rosenkränzer <bero@arklinux.org> maintained GNU grep until
+version 2.5.1, ie. from Sep 2001 till 2003.
+
+Stepan Kasal <kasal@ucw.cz> maintained GNU grep since Feb 2004.
+
+Tony Abou-Assaleh <taa@acm.org> maintains GNU grep since Oct 2007.
+
+Jim Meyering <jim@meyering.net> and Paolo Bonzini <bonzini@gnu.org>
+began maintaining GNU grep in Nov 2009.  Paolo bowed out in 2012.
+
+;; Local Variables:
+;; coding: utf-8
+;; End:
diff --git a/src/grep/COPYING b/src/grep/COPYING
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/src/grep/COPYING
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
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+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
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+
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+  The precise terms and conditions for copying, distribution and
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+
+                       TERMS AND CONDITIONS
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+  "This License" refers to version 3 of the GNU General Public License.
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diff --git a/src/grep/ChangeLog b/src/grep/ChangeLog
new file mode 100644
index 0000000..3151cc2
--- /dev/null
+++ b/src/grep/ChangeLog
@@ -0,0 +1,12542 @@
+2021-08-14  Jim Meyering  <meyering@fb.com>
+
+	version 3.7
+	* NEWS: Record release date.
+
+2021-08-09  Jim Meyering  <meyering@fb.com>
+
+	tests: provide an awk-based seq replacement
+	...so we can continue to use seq, but the wrapper when needed.
+	* tests/init.cfg (seq): Some systems lask seq.
+	Provide a replacement.
+	* tests/hash-collision-perf: Use seq once again.
+	* tests/long-pattern-perf: Likewise. And remove a comment about seq.
+
+2021-08-09  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: simplify EGexecute
+	* src/dfasearch.c (EGexecute): Remove a label and goto.
+	This also makes the machine code a bit shorter, on x86-64 gcc.
+
+	grep: simplify data movement slightly
+	* src/grep.c (fillbuf): Simplify movement of saved data.
+
+	grep: pointer-integer cast nit
+	* src/grep.c (ALIGN_TO): When converting pointers to unsigned
+	integers, convert to uintptr_t not size_t, as size_t in theory
+	might be too narrow.
+
+	tests: use awk, not seq
+	Portability problem reported by Dagobert Michelsen in:
+	https://lists.gnu.org/r/grep-devel/2021-08/msg00004.html
+	* tests/hash-collision-perf, tests/long-pattern-perf:
+	Don’t assume seq is installed; use awk instead.
+
+2021-08-08  Jim Meyering  <meyering@fb.com>
+
+	build: update gnulib to latest
+
+	build: update gnulib to latest
+
+2021-08-06  Kevin Locke  <kevin@kevinlocke.name>
+
+	doc: usage: --group-separator/--no-group-separator
+	* src/grep.c (usage): Document --group-separator
+	and --no-group-separator.
+
+	doc: man: add --group-separator/--no-group-separator
+	* doc/grep.in.1:
+	Add copy of docs for --group-separator from doc/grep.texi.
+	Add copy of docs for --no-group-separator from doc/grep.texi.
+
+2021-08-06  Jim Meyering  <meyering@fb.com>
+
+	build: update gnulib to latest
+
+2021-06-19  Mateusz Okulus  <mmokulus@gmail.com>
+
+	doc: note that -H is a GNU extension in man page, too
+	* doc/grep.in.1 (-H): Mention that this is a GNU extension.
+
+2021-06-13  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+2021-06-11  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+2021-06-10  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: improve examples and wording
+	* doc/grep.texi (The Backslash Character and Special Expressions)
+	(Usage): Improve doc (Bug#48948).
+
+2021-01-31  Jim Meyering  <meyering@fb.com>
+
+	doc: man: fix -L description and improve -l's
+	* doc/grep.texi (-L): Remove erroneous sentence about stopping early.
+	With -L, grep cannot stop scanning early.
+	(-l): Tweak existing wording.
+	* doc/grep.in.1: Remove the -L sentence here, too.
+	(-l): Copy the sentence from grep.texi, to clarify: it's only per-file
+	scanning that stops upon match.  Reported by Robert Bruntz
+	in http://debbugs.gnu.org/46179
+
+2021-01-05  Jim Meyering  <meyering@fb.com>
+
+	build: avoid long-string warnings in gnulib tests
+	* configure.ac (GNULIB_TEST_WARN_CFLAGS): Add
+	-Woverlength-strings to avoid clang warnings.
+
+2021-01-01  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: further clarify regexp structure
+	* doc/grep.texi (Fundamental Structure)
+	(Back-references and Subexpressions, Basic vs Extended):
+	Further clarifications.
+
+	maint: copy bootstrap, tests/init.sh from Gnulib
+
+	doc: update grep.texi cite to 2021
+
+	maint: run "make update-copyright"
+
+	build: update gnulib submodule to latest
+
+2020-12-30  Jim Meyering  <meyering@fb.com>
+
+	build: update gnulib to latest
+	* gnulib: update for clang-10 warning warning-avoidance
+	fixes in hash and regex-tests.
+
+	maint: add parentheses to avoid new clang-10 warning
+	* src/dfasearch.c (regex_compile): Parenthesize arith-OR vs
+	ternary, to placate clang-10.
+
+2020-12-29  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: clarify special chars and }
+	* doc/grep.texi (Fundamental Structure)
+	(Character Classes and Bracket Expressions)
+	(The Backslash Character and Special Expressions, Anchoring)
+	(Basic vs Extended): Clarify which characters are special,
+	and why \ is needed before } in grep even though } is not special.
+	Use Posix terminology for ordinary and special characters and for
+	interval expressions.
+
+2020-12-29  Marek Suppa  <mr@shu.io>
+
+	doc: fix missing right curly brace
+	* doc/grep.texi (Basic vs Extended Regular Expressions): Mention that
+	the right curly brace (}) meta-character must be backslash-escaped.
+	It had been omitted from the list.
+
+2020-12-25  Jim Meyering  <meyering@fb.com>
+
+	build: update gnulib to latest
+
+	grep: use of --unix-byte-offsets (-u) now elicits a warning
+	* NEWS (Change in behavior): Mention this.
+	* src/grep.c (main): Warn about each use of obsolete
+	--unix-byte-offsets (-u).
+	* doc/grep.in.1 (-u): Remove its documentation.
+
+2020-12-23  Helge Kreutzmann  <debian@helgefjell.de>
+
+	doc: adjust man page syntax
+	* doc/grep.in.1: Mark some manual names with B<...>.
+	Mark PATTERNS with I<...>.
+	Drop final period in SEE ALSO.
+	With suggestions from of several members of the manpage-l10n
+	translation community.  This resolves https://bugs.gnu.org/45353
+
+2020-11-26  Jim Meyering  <meyering@fb.com>
+
+	grep: avoid performance regression with many patterns
+	* src/grep.c (hash_pattern): Switch from PJW to DJB2, to avoid an
+	O(N) to O(N^2) performance regression due to hash collisions with
+	patterns from e.g., seq 500000|tr 0-9 A-J
+	Reported by Frank Heckenbach in https://bugs.gnu.org/44754
+	* NEWS (Bug fixes): Mention it.
+	* tests/hash-collision-perf: New file.
+	* tests/Makefile.am (TESTS): Add it.
+
+	build: update gnulib to latest for warning fixes
+	* gnulib: Update submodule to latest.
+	* src/grep.c (printf_errno): Reflect gnulib's renaming: change
+	_GL_ATTRIBUTE_FORMAT_PRINTF to
+	_GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD
+
+	tests: enable warnings for the gnulib-tests subdir
+	* gnulib-tests/Makefile.am (AM_CFLAGS): Enable gnulib
+	warning options for these tests.
+	* configure.ac (GNULIB_TEST_WARN_CFLAGS): Disable the same three
+	warning options that coreutils does, and a few more for GCC11.
+
+2020-11-08  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 3.6
+	* NEWS: Record release date.
+
+2020-11-05  Jim Meyering  <meyering@fb.com>
+
+	build: update gnulib to latest for test improvements
+
+2020-11-03  Jim Meyering  <meyering@fb.com>
+
+	build: update gnulib to latest for C++-ready dfa.h and test-verify.c fix
+
+2020-11-03  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: remove GREP_OPTIONS
+	* NEWS: Mention this.
+	* doc/grep.in.1:
+	Remove GREP_OPTIONS documentation.
+	* doc/grep.texi (Environment Variables):
+	Move GREP_OPTIONS stuff into a “no longer implemented” paragraph.
+	* src/grep.c (prepend_args, prepend_default_options): Remove.
+	(main): Do not look at GREP_OPTIONS.
+	* tests/Makefile.am (TESTS_ENVIRONMENTS):
+	* tests/init.cfg (vars_): Remove GREP_OPTIONS.
+
+2020-11-01  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: use RE_NO_SUB when calling regex solely to check syntax
+	* src/dfasearch.c (regex_compile): New parameter. All callers changed.
+	(GEAcompile): Move setting syntax for regex into regex_compile()
+	function.  This addresses a performance problem exposed by extreme
+	regular expressions, as described in https://bugs.gnu.org/43862 .
+
+	tests: add the test for bugfix in gnulib's dfa
+	* tests/ere.tests: Add new test.
+
+2020-11-01  Jim Meyering  <meyering@fb.com>
+
+	grep: avoid erroneous matches for e.g., a+a+a+
+	* gnulib: Update to latest, for dfa's invalid-merge fix.
+	* NEWS (Bug fixes): Mention this.
+
+2020-10-11  Jim Meyering  <meyering@fb.com>
+
+	grep: -P: report input filename upon PCRE execution failure
+	Without this, it could be tedious to determine which input
+	file evokes a PCRE-execution-time failure.
+	* src/pcresearch.c (Pexecute): When failing, include the
+	error-provoking file name in the diagnostic.
+	* src/grep.c (input_filename): Make extern, since used above.
+	* src/search.h (input_filename): Declare.
+	* tests/filename-lineno.pl: Test for this.
+	($no_pcre): Factor out.
+	* NEWS (Bug fixes): Mention this.
+
+2020-10-11  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: minor kwset cleanups
+	* src/kwsearch.c (Fexecute):
+	Assume C99 to put declarations nearer uses.
+	* src/kwset.c (bmexec): Omit unnecessary test.
+	* src/kwset.h (struct kwsmatch): Make OFFSET and SIZE individual
+	elements, not arrays of size 1 (a revenant of an earlier API).
+	All uses changed.
+
+2020-10-11  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: remove unused code
+	* src/kwsearch.c (Fcompile, Fexecute): Remove unused code.  No longer these
+	are used after commit 016e590a8198009bce0e1078f6d4c7e037e2df3c.
+
+2020-10-05  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+2020-10-05  Jim Meyering  <meyering@fb.com>
+
+	tests: correct filename-lineno.pl
+	* tests/filename-lineno.pl: Remove a stray envvar
+	that somehow slipped into expected output string.
+
+2020-10-05  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: fix tests when PCRE is not used
+	* tests/Makefile.am (TESTS_ENVIRONMENT):
+	Set PATH before setting PCRE_WORKS, so that the latter test
+	uses the just-built grep.
+	* tests/filename-lineno.pl (invalid-re-P-paren)
+	(invalid-re-P-star-paren): Adjust non-PCRE case to match
+	recently-changed behavior.
+
+	build: update gnulib submodule to latest
+
+2020-10-03  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: document --include/--exclude better
+	Problem reported by John Ruckstuhl (Bug#43782).
+	* doc/grep.texi (File and Directory Selection):
+	Document what happens if contradictory options are given,
+	or if no option matches a file name.
+	* doc/grep.in.1:
+
+2020-10-01  Jim Meyering  <meyering@fb.com>
+
+	maint: add technically-required quotes
+	* configure.ac: Quote args of AC_CONFIG_AUX_DIR, AC_CONFIG_SRCDIR
+	and AC_CHECK_FUNCS_ONCE.
+
+2020-09-28  Jim Meyering  <meyering@fb.com>
+
+	tests: restore deleted -P tests
+	v3.4-almost-45-g8577dda deleted these two -P-using tests because a
+	grep built without PCRE support would fail those tests. This sets
+	an envvar with the equivalent of the result from the require_pcre_
+	function and restores the now-guarded tests. Tested by running this:
+	  ./configure --disable-perl-regexp && make check
+	* tests/Makefile.am (PCRE_WORKS): Set this envvar.
+	* tests/filename-lineno.pl: Restore invalid-re-P-paren and
+	invalid-re-P-star-paren, now each with a guard.
+
+2020-09-27  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 3.5
+	* NEWS: Record release date.
+
+	maint: avoid autoconf warnings * configure.ac (AC_HEADER_STDC): Remove.  It's been assumed for ages. * m4/pcre.m4 (gl_FUNC_PCRE): Use AS_HELP_STRING, not AC_HELP_STRING.
+
+	build: update gnulib to latest
+
+2020-09-26  Jim Meyering  <meyering@fb.com>
+
+	build: update gnulib to latest
+
+	tests: skip stack-overflow test when built with ASAN
+	* tests/stack-overflow: Skip this test when the binary was built
+	with ASAN, to avoid spurious failures.
+
+2020-09-25  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+	build: update gnulib submodule to latest
+
+2020-09-24  Jim Meyering  <meyering@fb.com>
+
+	tests: fix surrogate-pair test to work on 16-bit wchar_t systems
+	* tests/surrogate-pair: Avoid new failure on systems with
+	16-bit wchar_t.  Detect the condition and exit before the
+	otherwise-failing tests.  Remove the now-incorrect in-loop
+	test for that alternate failure mode.  This was exposed by
+	testing on gcc119.fsffrance.org, a power8 AIX 7.2 system.
+
+2020-09-23  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: don't assume PCRE in tests
+	* tests/filename-lineno.pl: Remove invalid-re-P-paren and
+	invalid-re-P-star-paren as they assume PCRE support, which
+	causes a false alarm "grep: Perl matching not supported in a
+	--disable-perl-regexp build" on platforms without PCRE.
+
+	grep: pacify Sun C 5.15
+	This suppresses a false alarm '"grep.c", line 720: warning:
+	initializer will be sign-extended: -1'.
+	* src/grep.c (uword_max): New static constant.
+	(initialize_unibyte_mask): Use it.
+
+2020-09-23  Paul Eggert  <eggert@cs.ucla.edu>
+	    Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: fix more Turkish-eyes bugs
+	Fix more bugs recently uncovered by Norihiro Tanaka (Bug#43577).
+	* NEWS: Mention new bug report.
+	* src/grep.c (ok_fold): New static var.
+	(setup_ok_fold): New function.
+	(fgrep_icase_charlen): Reject single-byte characters
+	if they match some multibyte characters when ignoring case.
+	This part of the patch is partly derived from
+	<https://bugs.gnu.org/43577#14>, which means it is:
+	(main): Call setup_ok_fold if ok_fold might be needed.
+	* src/searchutils.c (kwsinit): With the grep.c changes,
+	this code can now revert to classic 7th Edition Unix style;
+	aborting would be wrong.
+	* tests/turkish-eyes: Add tests for these bugs.
+
+2020-09-23  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+	* NEWS: Mention Bug#43577, which this fixes.
+
+	grep: fix recently-introduced performance glitch
+	* src/grep.c (main): Do not double-increment update_patterns.
+	update_patterns increments n_patterns now; do not increment it
+	again, as the incorrect count would hurt performance heuristics later.
+
+2020-09-22  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: improve --line-buffer doc
+	* doc/grep.texi (Other Options): Document --line-buffered more
+	carefully, and say what happens when it is not used.  Problem
+	reported by Dan Jacobson (Bug#35339).
+
+	tests: port timeout test to Alpine
+	Problem reported by Bruno Haible in:
+	https://lists.gnu.org/r/grep-devel/2020-09/msg00080.html
+	* tests/init.cfg (require_timeout_): Check that ‘timeout 0.01
+	sleep 0.02’ works as expected, to avoid spurious test failure
+	on Alpine.
+
+2020-09-22  Jim Meyering  <meyering@fb.com>
+
+	tests: test for many-regexp N^2 RSS regression
+	* tests/many-regex-performance: New test for this performance
+	regression.
+	* tests/Makefile.am: Add it.
+	* NEWS (Bug fixes): Describe it.
+
+2020-09-22  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: avoid unnecessary regex compilation
+	Grep resorts to using the regex engine when the precision of either
+	-o or --color is required, or when the pattern is not supported by
+	our DFA engine (e.g., backref). Otherwise, grep would perform regex
+	compilation solely to check the syntax. This change makes grep skip
+	that compilation in the common case for which it is unnecessary.
+
+	The compilation we are avoiding is quite costly, consuming O(N^2)
+	RSS for N regular expressions.
+
+	* src/dfasearch.c (GEAcompile): Add new argument, and avoid unneeded
+	compilation of regex.
+	* src/grep.c (compile_fp_t): Update prototype.
+	(main): Update caller.
+	* src/kwsearch.c (Fcompile): Update caller and add new argument.
+	* src/pcresearch.c (Pcompile): Add new argument.
+	* src/search.h (GEAcompile, Fcompile, Pcompile): Update prototype.
+
+2020-09-22  Jim Meyering  <meyering@fb.com>
+
+	build: update gnulib to latest
+
+	tests: skip stack-overflow test on midnightbsd*
+	* tests/stack-overflow: skip_ when run on this OS. See details
+	in https://lists.gnu.org/r/grep-devel/2020-09/msg00062.html
+	* tests/Makefile.am (host_triplet): Export.
+
+2020-09-21  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: say how to match chars by code
+	From a suggestion in Bug#41004.
+	* doc/grep.texi (Character Encoding, Matching Non-ASCII):
+	New sections.  Move some material from Environment Variables
+	into these sections.
+
+2020-09-18  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* src/dfasearch.c (struct dfa_comp): Fix out-of-date comment.
+
+	grep: "grep '\)'" reports an error again
+	* src/grep.c (try_fgrep_pattern): With -G, pass \) through to
+	GEAcompile so that it can complain.  This fixes an unexpected
+	change in behavior from grep 3.4 and earlier.
+	* tests/filename-lineno.pl: Add tests for this sort of thing.
+
+	grep: tweak by using mempcpy
+	* src/grep.c (try_fgrep_pattern): Tweak previous change
+	by using mempcpy.
+
+2020-09-18  Jim Meyering  <meyering@fb.com>
+
+	grep: make echo .|grep '\.' match once again
+	The same applied for many other backslash-escaped bytes, not just
+	metacharacters.  The switch to rawmemchr in v3.4-almost-10-g9393b97
+	made some parts of the code require the usually-guaranteed newline
+	sentinel at the end of each pattern. Before, some consumers used a
+	(correct) pattern length and did not care that try_fgrep_pattern could
+	transform a pattern (with sentinel) like "\\.\n" to "..\n", thus
+	violating that assumption.
+	* src/grep.c (try_fgrep_pattern): Preserve the invariant
+	that each regexp is newline-terminated.
+	* tests/backslash-dot: New file. Test for this.
+	* tests/Makefile.am (TESTS): Add it.
+
+	tests: triple-backref: print a reference to glibc bug
+	* tests/triple-backref (MALLOC_CHECK_): And tell glibc not to
+	bother with a core dump.  Suggested by Pádraig Brady.
+
+2020-09-18  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: be more consistent about diagnostic format
+	* NEWS: Mention this.
+	* bootstrap.conf (gnulib_modules): Remove 'quote'.
+	* src/grep.c: Do not include quote.h.
+	(grep, grepdirent, grepdesc): Put the three unusual diagnostics
+	into the same "grep: FOO: message" form that grep uses elsewhere.
+	* tests/binary-file-matches, tests/in-eq-out-infloop:
+	Adjust tests to match new diagnostic format.
+
+2020-09-17  Jim Meyering  <meyering@fb.com>
+
+	build: update gnulib to latest
+
+2020-09-17  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* tests/triple-backref: Add comment.
+
+2020-09-17  Jim Meyering  <meyering@fb.com>
+
+	tests: make new test executable, to placate distcheck
+	* tests/binary-file-matches: Make this executable.
+
+	tests: add coverage for code that emits the new diagnostic
+	* tests/binary-file-matches: New file.
+	* tests/Makefile.am (TESTS): Add it.
+
+	maint: avoid syntax-check failure
+	* src/grep.c (grep): Lower-case the "B" in "Binary file... matches"
+	diagnostic that we now emit to stderr. This avoids the following
+	when running "make syntax-check":
+	  maint.mk: found capitalized error message
+	  make: *** [maint.mk:469: sc_error_message_uppercase] Error 1
+
+2020-09-17  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Send "Binary file FOO matches" to stderr
+	* NEWS, doc/grep.texi: Mention this change (Bug#29668).
+	* src/grep.c (grep): Send "Binary file FOO matches" to stderr
+	instead of stdout.
+	* tests/encoding-error, tests/invalid-multibyte-infloop:
+	* tests/null-byte, tests/pcre-count, tests/surrogate-pair:
+	* tests/symlink, tests/unibyte-binary:
+	Adjust tests to match new behavior.  In all cases this
+	simplifies the tests, which is a good sign.
+
+	Suppress "Binary file FOO matches" if -I
+	Problem reported by Jason Franklin (Bug#33552).
+	* NEWS: Mention this.
+	* src/grep.c (grep): Do not output "Binary file FOO matches" if -I.
+	* tests/encoding-error: Add test for this bug.
+
+2020-09-15  Jim Meyering  <meyering@fb.com>
+
+	maint: keep two blank lines before each old Noteworthy line.
+	* NEWS: Insert a blank line.
+
+2020-09-15  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+2020-09-13  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+2020-09-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+2020-09-11  Jim Meyering  <meyering@fb.com>
+
+	build: update gnulib to latest
+
+2020-09-09  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fix logic for growing PCRE JIT stack
+	* src/pcresearch.c (jit_exec) [PCRE_EXTRA_MATCH_LIMIT_RECURSION]:
+	When growing the match_limit_recursion limit, do not use the old
+	value if ! (flags & PCRE_EXTRA_MATCH_LIMIT_RECURSION), as it is
+	uninitialized in that case.
+
+	grep: fix PCRE JIT test when JIT not available
+	Problem reported by Thomas Deutschmann (Bug#29446#23).
+	* src/pcresearch.c (Pexecute): Diagnose PCRE_ERROR_RECURSIONLIMIT.
+	* tests/pcre-jitstack: Treat recursion limit overflow like stack
+	overflow.
+
+	grep: fix -w bug in UTF-8 locales
+	Problem reported by Mayo Fark (Bug#43225).
+	* src/searchutils.c (wordchar_prev): In a UTF-8 locale, do not
+	assume that an encoding-error byte cannot be part of a word
+	constituent, as this assumption is incorrect for the last byte
+	of a multibyte word constituent.
+	* tests/word-delim-multibyte: Add a test for the bug.
+
+	Distribute a gzip tarball again
+	Requested by Issam E. Maghni in:
+	https://lists.gnu.org/r/grep-devel/2020-09/msg00000.html
+	* configure.ac (AM_INIT_AUTOMAKE): Remove no-dist-gzip.
+
+	* README-prereq: Also mention xz.
+
+2020-09-07  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Prefer rawmemchr to memchr when it’s easy
+	* bootstrap.conf (gnulib_modules): Add rawmemchr.
+	* src/dfasearch.c (GEAcompile, EGexecute):
+	* src/grep.c (update_patterns, prpending, prtext):
+	* src/kwsearch.c (Fcompile, Fexecute):
+	* src/pcresearch.c (Pcompile, Pexecute):
+	Simplify (and presumably speed up a little) by using rawmemchr
+	with a sentinel, instead of using memchr.
+
+	Simplify pattern_file_name
+	* src/grep.c (pattern_file_name): Make first argument
+	origin-0, not origin-1, as this simplifies both caller and
+	callee.  All uses changed.
+
+	Simplify regex_compile
+	* src/dfasearch.c (regex_compile): "" suffices; we don’t need "\0".
+	No need to initialize pat_lineno.
+
+	Omit duplicate regexps
+	Do not pass two copies of the same regexp to the
+	regular-expression engine.  Although the engines should
+	perform nearly as well even with the copies, in practice they do not.
+	Problem reported by Luca Borzacchiello (Bug#43040).
+	* bootstrap.conf (gnulib_modules): Add hash.
+	* src/grep.c: Include stdint.h, for SIZE_WIDTH.
+	Include hash.h.
+	(struct patloc, patloc, patlocs_allocated, patlocs_used):
+	Rename from struct FL_pair, fl_pair, n_fl_pair_slots, n_pattern_files,
+	respectively, since the data type is no longer a pair.
+	All uses changed.
+	(struct patloc): New member FILELINE.  The lineno member is now
+	ptrdiff_t since nowadays we prefer signed types.
+	(pattern_array, patterns_table): New static vars.
+	(count_nl_bytes, fl_add): Remove; no longer used.
+	(hash_pattern, compare_patterns, update_patterns): New functions.
+	update_patterns does what fl_add used to do, plus remove dups.
+	(pattern_file_name): Adjust to change from fl_pair to patloc.
+	(main): Move some variables to inner blocks for clarity.
+	Maintain the pattern_table hash of all patterns.
+	Update pattern_array to match keys, and use update_patterns
+	instead of fl_add to remove duplicate keys.
+	* tests/filename-lineno.pl (invalid-re-2-files)
+	(invalid-re-2-files2, invalid-re-2e): Ensure regexps are unique in
+	tests so that dups aren’t removed in diagnostics.
+	(invalid-re-line-numbers): New test.
+
+2020-08-23  Jim Meyering  <meyering@fb.com>
+
+	build: update gnulib to latest
+	* gnulib: Update submodule to latest.
+	* bootstrap.conf (gnulib_modules): Add explicit dependency on dirname-lgpl.
+	Before, we pulled this in via a dependency.
+	* bootstrap: Update from gnulib.
+
+	build: require autoconf-2.64
+	* configure.ac: Require autoconf-2.64, up from 2.63, to align with gnulib.
+
+2020-08-22  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Revert -L exit status change introduced in grep 3.2
+	Problems reported by Antonio Diaz Diaz in:
+	https://bugs.gnu.org/28105#29
+	* NEWS, doc/grep.texi (Exit Status), src/grep.c (usage):
+	Adjust documentation accordingly.
+	* src/grep.c (grepdesc, main): Go back to old behavior.
+	* tests/skip-read: Adjust tests accordingly.
+
+2020-01-20  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: fix permission issue in previous change
+
+	tests: work around GCC -fprofile-generate bug
+	* tests/triple-backref: Add a 10 s timeout to work around
+	what appears to be a GCC bug with -fprofile-generate.
+	Problem reported by Martin Liška, with diagnosis by
+	Andreas Schwab (Bug#21513).
+
+2020-01-02  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 3.4
+	* NEWS: Record release date.
+
+	build: update gnulib to latest, for mbrtowc-vs-Irix build fix
+
+2020-01-02  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: mention glibc bug 24269
+	* doc/grep.texi (Known Bugs): Mention glibc bug 24269.
+	Merge formatting/URL changes from Gnulib regex.texi.
+
+	doc: fix --exclude description in man page
+	Problem reported by Duncan Moore (Bug#37212).
+	* src/grep.c (usage): Fix incorrect statement about --exclude
+	and directories.  Standardize on “that match GLOB” instead
+	of “matching GLOB”.
+
+	doc: fix missing “more” in man page
+	Problem reported by Philippe Schnoebelen (Bug#34078).
+	* doc/grep.in.1: Add missing “more”.
+
+2020-01-01  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: add [:blank:] to man page
+	* doc/grep.in.1: Mention [:blank:] (Bug#33291).
+
+2020-01-01  Jim Meyering  <meyering@fb.com>
+
+	maint: update all copyright year number ranges
+	Run "make update-copyright" and then...
+	* gnulib: Update to latest with copyright year adjusted.
+	* tests/init.sh: Sync with gnulib to pick up copyright year.
+	* bootstrap: Likewise.
+	* doc/grep.in.1: Use "-" in copyright year ranges, not \en.
+
+2019-12-31  Jim Meyering  <meyering@fb.com>
+
+	tests: avoid unwarranted failure in a netbsd 8.1 VM
+	* tests/mb-non-UTF8-perf-Fw: Run twice, to avoid first-read penalty.
+	Reported by Nelson H.F. Beebe.
+
+2019-12-30  Jim Meyering  <meyering@fb.com>
+
+	build: update gnulib to latest (for localeinfo perf fix)
+
+	maint: add syntax-check rule to prohibit "backreference" spelling
+	* cfg.mk (sc_prohibit_backref): New rule.
+
+2019-12-30  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: remove too-long line from AUTHORS
+	* AUTHORS: Remove URL that’s too long.
+
+	maint: update AUTHORS
+	* AUTHORS: Update to better reflect current authorship.
+
+2019-12-30  Jim Meyering  <meyering@fb.com>
+
+	avoid new syntax-check failures
+	* cfg.mk (old_NEWS_hash): Updating old news, we must also udpate this.
+
+2019-12-30  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: don’t encourage back-references
+	* doc/grep.texi (Usage): Remove palindrome question.  Bondioni’s
+	RE makes grep issue a ‘grep: stack overflow’ diagnostic, and we
+	shouldn’t be encouraging fancy back-references anyway, due to all
+	the bugs in this area (Bug#26864).  Plus, the allusion to
+	“GNU extensions” doesn't seem to be correct here.
+
+	doc: robustify some examples
+	Prompted by suggestions by Stephane Chazelas (Bug#38792#20).
+	* doc/grep.texi (Usage): Make examples more robust.
+
+	doc: fix bug# typo
+
+	doc: spell "back-reference" more consistently
+
+	doc: mention back-reference bugs
+	Inspired by Bug#26864.
+	* doc/grep.texi (Known Bugs): New section.
+	Mention back-reference issues.
+
+2019-12-29  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: Add -- to more-complex example
+	Suggested by Stephane Chazelas (Bug#38792).
+	* doc/grep.in.1, doc/grep.texi: Add ‘--’ to recently-added example.
+
+	doc: improve subsection title (Bug#26132)
+	* doc/grep.in.1: Rename "Matcher Selection" to "Pattern Syntax".
+
+	doc: fix typo in previous patch
+
+	doc: document quoting better
+	Problem reported by Martin Simons (Bug#38792).
+	* doc/grep.texi: Fix quoting used in examples.  Say that patterns
+	should be quoted, use quoting more consistently in examples, and
+	give an example illustrating the difference between patterns and
+	globbing.  Don’t assume zgrep expertise in example.
+	* doc/grep.in.1: Likewise.  Also, reorder sections
+	to match GNU/Linux man-pages style.
+
+2019-12-26  Jim Meyering  <meyering@fb.com>
+
+	maint: tweak NEWS wording
+	* NEWS: Minor wording change.
+
+	build: update gnulib to latest; and sync tests/init.sh
+	* gnulib: update
+	* tests/init.sh: Sync from gnulib (this removes the LC_ALL=C setting).
+
+	tests: avoid spurious failure due to 1-second timeout
+	* tests/grep-dev-null-out: Use a 10-second timeout, rather than
+	a 1-second one.  This avoids false failure on slow systems.
+	Reported by Assaf Gordon in
+	https://lists.gnu.org/r/grep-devel/2019-12/msg00018.html
+
+2019-12-26  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+	maint: adjust surrogate-pair for 16-bit wchar_t
+	* tests/surrogate-pair: Adjust to match fixed behavior
+	on AIX 7.2, where wchar_t is 16 bits and cannot represent
+	the test case data.
+
+2019-12-25  Jim Meyering  <meyering@fb.com>
+
+	tests: fix typo in name of test file
+	* tests/backslash-s-vs-invalid-multitype: Rename to...
+	* tests/backslash-s-vs-invalid-multibyte: ...this.
+	* tests/Makefile.am (TESTS): Reflect renaming.
+
+	tests: ensure we use require_timeout_ when needed
+	* cfg.mk (sc_timeout_prereq): New syntax-check rule.
+
+	tests: require timeout
+	* tests/mb-non-UTF8-perf-Fw: This test uses "timeout",
+	so must first call require_timeout_.
+	This avoids test spurious failure when running with
+	no timeout program. Reported by Bruno Haible in
+	https://lists.gnu.org/r/grep-devel/2019-12/msg00008.html
+
+2019-12-25  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: work around AIX 7.2 sh printf bug
+	AIX 7.2 /bin/sh’s printf command mishandles octal escapes
+	in multibyte locales: it treats them as characters, not bytes.
+	* tests/backslash-s-vs-invalid-multitype, tests/encoding-error:
+	Use the C locale when employing the printf command with an octal
+	escape that AIX 7.2 sh might mishandle.
+	* tests/init.sh (setup_): Use the C locale for tests.
+	This has the side benefit of making them more reproducible.
+
+2019-12-22  Jim Meyering  <meyering@fb.com>
+
+	maint: adjust new comments
+	* src/dfasearch.c (possible_backrefs_in_pattern): Remove a
+	duplicate "a", insert a "be" and a comma, and reformat.
+
+	build: update gnulib to latest
+	* gnulib: Update submodule to latest.
+	* bootstrap: Copy from gnulib.
+	* tests/init.sh: Likewise.
+
+2019-12-22  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fix some bugs in pattern-grouping speedup
+	This fixes some bugs in the previous commit,
+	and should finish the fix for Bug#33249.
+	* NEWS: Mention fix for Bug#33249.
+	* src/dfasearch.c (possible_backrefs_in_pattern, regex_compile)
+	(GEAcompile): In new code, prefer ptrdiff_t to size_t when either
+	will do, since ptrdiff_t has better error checking.  At some point
+	we should adjust the old code too.
+	(possible_backrefs_in_pattern): Rename from
+	find_backref_in_pattern.  New arg BS_SAFE.  All uses changed.
+	Fix false negative if a multibyte character ends in a single
+	'\\' byte, followed by the two bytes '\\', '1'.
+	(regex_compile): Simplify.
+	(GEAcompile): Avoid quadratic behavior when reallocating growing
+	buffers.  Fix a couple of bugs in copying pattern data involving
+	backreferences.  Fix another bug in copying pattern metadata
+	involving backreferences, by removing the need to copy it.
+
+2019-12-22  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: grouping of a pattern with multiple lines
+	When grep uses regex, it splits a pattern with multiple lines by
+	newline character into fragments.  Compilation and execution run for
+	each fragment.  That causes slowdown.  By this change, each fragment is
+	divided into groups by whether the fragment includes back references.
+	A fragment with back references constitutes group, and all fragments
+	that lack back references also constitute a group.
+
+	This change extremely speeds-up following case.
+
+	  $ seq -f '%040g' 0 9999 | sed '1s/$/\\(0\\)\\1/' >pat
+	  $ yes 00000000000000000000000000000000000000000x | head -10000 >in
+	  $ time -p env LC_ALL=C src/grep -f pat in
+
+	* src/dfasearch.c (find_backref_in_pattern, regex_compile):
+	New functions.
+	(GEAcompile): Use the new functions to group fragments
+	as mentioned above.
+
+2019-12-19  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: add NEWS for Bug#34951 fix
+	* NEWS: Mention Bug#34951.
+
+2019-12-19  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: separate parse and compile phase
+	DFAMUST() must be called after parse and before tokens re-order which is
+	introduced in commit 5c7a0371823876cca7a1347fa09ca26bbbff0c98, but both are
+	executed in compilation phase.
+
+	* lib/dfa.c (dfaparse): Change it to global function.
+	(dfacomp): If first argument is NULL, skip parse.
+	* lib/dfa.h: (dfaparse): Add a prototype.
+
+2019-12-19  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+2019-12-19  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: speed up multiple word matching
+	grep uses its KWset matcher for multiple word matching, but that is
+	very slow when most of the parts matched to a pattern are not words.
+	So, if the first match to a pattern is not a word, use the grep matcher
+	to match for its line.
+
+	Note that when START_PTR is set, the grep matcher uses the regex matcher
+	which is very slow to match words.  Therefore, we use the grep matcher
+	when only START_PTR is NULL.
+
+	* src/kwsearch.c (Fexecute): If an initial match is incomplete because
+	not on a word boundary, use the grep matcher to find a matching line.
+
+2019-12-18  Jim Meyering  <meyering@fb.com>
+
+	maint: sort test names
+	* tests/Makefile.am (TESTS): Alphabetize the new addition,
+	mb-non-UTF8-perf-Fw to placate syntax-check's sc_sorted_tests.
+
+2019-12-18  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: adjust to recent Gnulib change
+	* po/POTFILES.in: Remove lib/xstrtol-error.c.
+
+2019-12-17  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: do not match invalid UTF-8
+	Update Gnulib to latest.  Also:
+	* src/dfasearch.c (EGexecute): Use ptrdiff_t, not size_t,
+	to match new Gnulib API.
+	* tests/Makefile.am (TESTS): Add dfa-invalid-utf8.
+	* tests/dfa-invalid-utf8: New file.
+
+2019-11-30  Jim Meyering  <meyering@fb.com>
+
+	tests: add test that would have detected -Fw perf regression
+	* tests/mb-non-UTF8-perf-Fw: New file. Detect v3.3-22-g090a4db's
+	performance regression.
+	* tests/Makefile.am (TESTS): Add it.
+
+2019-11-29  Jim Meyering  <meyering@fb.com>
+
+	maint: fix test comment
+	* tests/mb-non-UTF8-word-boundary: Also correct "introduced-in"
+	version number in a comment here.
+
+2019-11-25  Jim Meyering  <meyering@fb.com>
+
+	maint: correct NEWS blurb
+	* NEWS (Bug fixes): Correction: the -Fw bug was introduced
+	in 2.28, not in 3.0. Reported by Paul Eggert.
+
+2019-11-17  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: improve grep -Fw performance in non-UTF8 multibyte locales
+	* src/searchutils.c (mb_goback): New parameter.  All callers changed.
+	* src/search.h (mb_goback): Update prototype.
+	* src/kwsearch.c (Fexecute): Use mb_goback's MBCLEN to detect a
+	word-boundary even more efficiently.
+
+	grep: fix performance regression with previous patch
+	* src/kwsearch.c (Fexecute): Avoid unnecessary back-up in non-UTF8
+	multibyte locales.
+
+2019-11-16  Jim Meyering  <meyering@fb.com>
+
+	maint: rename a variable: bol -> nl
+	* src/kwsearch.c (Fexecute): Change misleading name: s/bol/nl/
+
+	build: update gnulib to latest
+
+	maint: correct and clarify a comment
+	* src/kwsearch.c (Fexecute): Logic was reversed.
+
+	grep: avoid false -Fw match in non-UTF8 multibyte locales
+	For example, this command would erroneously print its input line:
+	  echo ab | LC_CTYPE=ja_JP.eucjp grep -Fw b
+	This arose when the "memrchr" search for a preceding newline failed:
+	in that case, MB_START was not adjusted and was initially the same
+	as BEG, so wordchar_prev mistakenly returned 0.
+	* src/kwsearch.c (Fexecute): Set MB_START also when there is no
+	preceding newline.
+	* NEWS (Bug fixes): Mention it.
+	* tests/mb-non-UTF8-word-boundary: New file. Test for the bug.
+	* tests/Makefile.am (TESTS): Add it.
+	Reported by NIDE, Naoyuki in https://bugs.gnu.org/38223.
+
+2019-11-08  Jim Meyering  <meyering@fb.com>
+
+	build: update gnulib to latest
+	* po/POTFILES.in: Add lib/argmatch.h.
+
+2019-11-05  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: new --no-ignore-case option
+	Suggested by Karl Berry and mostly implemented by Arnold Robbins
+	(Bug#37907).
+	* NEWS:
+	* doc/grep.in.1:
+	* doc/grep.texi (Matching Control):
+	* src/grep.c (usage):
+	Document the new option.
+	* src/grep.c (NO_IGNORE_CASE_OPTION): New constant.
+	(long_options, main): Support new option.
+
+	grep: simplify previous patch
+	* src/grep.c (main): Use an int rather than an enum for a local
+	var, which is overkill here.
+
+	grep: further simplify out_file handling
+	* src/grep.c (print_filenames): Make this a local variable instead
+	of static.  Rename it to filename_option, to avoid confusion with
+	the print_filename function, and rename the enum values for the
+	same reason.  All uses changed.
+	(out_file): Now -1, 0, 1 to represent unknown, false, true.
+	All uses changed.
+	(single_command_line_arg): Remove.  This static variable’s
+	function is now accomplished by a local variable ‘num_operands’.
+	(grepdesc): Simplify adjustment of out_file accordingly.
+	(main): Initialize out_file to -1 if not known yet.
+
+2019-11-05  Zev Weiss  <zev@bewilderbeest.net>
+
+	grep: simplify out_file handling
+	* src/grep.c (print_filenames): New tristate enum (-H, -h, or
+	neither); supplants with_filenames and no_filenames.
+	(single_command_line_arg): New variable indicating if grep was run
+	with a single command-line argument.
+	(no_filenames): Remove variable.
+	(grepdirent): Don't twiddle out_file back and forth during recursion.
+	(grepdesc): Turn off out_file on 'grep -r foo nondirectory'.
+	(main): Replace with_filenames and no_filenames with print_filenames.
+	Enable out_file when both -r/-R and multiple arguments are given.
+
+2019-10-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fix ‘grep -L ... >/dev/null’ bug
+	Problem reported by Adam Sampson (Bug#37716).
+	* NEWS: Mention this.
+	* src/grep.c (grepdesc): Don’t assume that stdout being /dev/null
+	means list_files == LISTFILES_NONE.
+	(main): Do not change list_files merely because stdout is /dev/null.
+	* tests/skip-read: Test for this bug.
+
+2019-10-03  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: tighten -i doc
+	* doc/grep.in.1:
+	* doc/grep.texi (Matching Control):
+	* src/grep.c (usage):
+	Make it clearer that -i affects patterns and data, but not
+	file names (Bug#37604).
+
+2019-03-10  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: fix “/src/grep: No such file or directory”
+	Problem reported by Jim Meyering in:
+	https://lists.gnu.org/r/grep-devel/2019-02/msg00000.html
+	* NEWS: Mention the change.
+	* configure.ac (fn_grep): Remove.  This old attempt to fix
+	<https://savannah.gnu.org/bugs/?31646> wasn’t working anyway,
+	since subprograms didn’t grok fn_grep.  People building on Solaris
+	will need a working grep, which is reasonably standard nowadays.
+	(GREP, EGREP): Do not override.  This way, we test the
+	newly-built grep only when running ‘make test’ and suchlike.
+	Instead, output a hopefully-helpful diagnostic if the
+	system 'grep' does not work.
+
+2019-02-18  Jim Meyering  <meyering@fb.com>
+
+	tests: avoid false positive upon stack overflow
+	* tests/pcre-jitstack: Don't let a stack overflow evoke a false
+	failure.  This test is to ensure there is no internal PCRE error.
+	Reported by Andreas Schwab in http://bugs.gnu.org/34370
+
+2019-02-16  Jim Meyering  <meyering@fb.com>
+
+	build: avoid build failure with --enable-gcc-warnings
+	* src/kwset.c (bmexec_trans): Define with _GL_ATTRIBUTE_PURE,
+	per suggestion from recent gcc snapshot.
+
+2019-02-03  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: clarify --exclude globbing
+	Problem reported by Paul Jackson.
+	* doc/grep.in.1:
+	* doc/grep.texi (File and Directory Selection):
+	Clarify how --exclude globbing works.
+
+	grep: parse --color arg independent of locale
+	This is a better fix for Bug#34285.
+	* bootstrap.conf (gnulib_modules): Add c-strcase.
+	* src/grep.c: Include c-strcase.h, not strings.h.
+	(main): Use c_strcasecmp, not strcasecmp.
+
+2019-02-02  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fix grep.c includes
+	* src/grep.c: Include strings.h; problem reported by David
+	Monniaux (Bug#34285).  Do not include fcntl.h, as system.h does
+	that for us.h
+
+	build: update gnulib submodule to latest
+
+2019-01-20  Jim Meyering  <meyering@fb.com>
+
+	build: ensure no VLA is used
+	Cause developer builds to fail for any use of a VLA.
+	VLAs (variable length arrays) limit portability.
+	* configure.ac (nw): Remove -Wvla from the list of disabled warnings,
+	thus enabling the warning when configured with --enable-gcc-warnings.
+	(GNULIB_NO_VLA) Define, disabling use of VLAs in gnulib.  This commit
+	is functionally equivalent to coreutils' v8.30-44-gd26dece5d.
+
+	build: update gnulib to latest
+
+2019-01-20  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: --binary-files update in man page
+	* doc/grep.in.1: Adjust --binary-files description to match that
+	in doc/grep.texi.  When I updated the documentation in
+	2016-09-09T01:33:14!eggert@cs.ucla.edu I forgot to update the man
+	page accordingly (Bug#33898).
+
+	grep: simplify pcresearch.c ifdefs
+	This fixes a warning if PCRE is not used (Bug#34054).
+	* configure.ac (USE_PCRE): New conditional.
+	* src/Makefile.am (grep_SOURCES) [!USE_PCRE]: Omit pcresearch.c.
+	* src/grep.c (matchers) [!HAVE_LIBPCRE]: Omit perl matcher.
+	(setmatcher) [!HAVE_LIBPCRE]: If helpful, mention
+	--disable-perl-regexp in diagnostic.
+	* src/pcresearch.c: Simplify by assuming HAVE_LIBPCRE.
+
+2019-01-01  Jim Meyering  <meyering@fb.com>
+
+	maint: update all copyright dates via "make update-copyright"
+	* gnulib: Also update submodule for its copyright updates.
+
+2018-12-20  Jim Meyering  <meyering@fb.com>
+
+	doc: fix the bug-introduced version in 3.3's announcement
+	* NEWS: Correct bug-introduced version (s/2.3/3.2/).
+	* cfg.mk (old_NEWS_hash): Updating old news, we must also udpate this.
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 3.3
+	* NEWS: Record release date.
+
+	grep: fix \b DFA-bug in C locale
+	Under some conditions, \b would mistakenly fail to match, e.g.
+	  echo 123-x|LC_ALL=C grep '.\bx'
+	* NEWS (Bug fixes): Mention it
+	* gnulib: Update to latest, for DFA regression fix.
+	* tests/word-delim-multibyte: Add a test for the dfa.c regression.
+
+2018-12-20  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fit --version authorship into 80
+	* src/grep.c (AUTHORS): Remove.
+	(main): Output the authorship info ourselves instead of having
+	version_etc do it.  This is better for i18n anyway.
+
+	build: update gnulib submodule to latest
+
+2018-12-20  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 3.2
+	* NEWS: Record release date.
+
+2018-12-18  Jim Meyering  <meyering@fb.com>
+
+	build: update gnulib for c-stack fix
+
+2018-12-17  Bruno Haible  <bruno@clisp.org>
+
+	tests: stack-overflow: avoid unwarranted test failure on some hosts
+	* tests/stack-overflow: Use ulimit to limit stack size. Otherwise,
+	at least on gcc113, grep would fail to overflow its stack, so this
+	test would fail to find the required diagnostic and would fail.
+
+2018-12-16  Jim Meyering  <meyering@fb.com>
+
+	tests: reenable the surrogate-pair test
+	This reverts commit bdb98cec2e7bf255e1d00eaf8be16299f7bf571e,
+	but adding the comment changes suggested by Bruno Haible in
+	https://lists.gnu.org/r/grep-devel/2018-12/msg00037.html
+	* tests/surrogate-pair: New file.
+	* tests/Makefile.am (TESTS): List it.
+
+2018-12-16  Bruno Haible  <bruno@clisp.org>
+
+	tests: stackoverflow: fix test failure on HardenedBSD 11
+	* tests/stack-overflow: Try up to 10 million opening parentheses.
+
+2018-12-16  Jim Meyering  <meyering@fb.com>
+
+	tests: remove stale surrogate-pair test
+	The cygwin-specific code for surrogate pairs was first disconnected
+	via v2.21-62-g936c904 and later removed as part of a then-unused
+	function via v2.24-12-g704de87. So now I'm removing the test, too.
+	If someone thinks it important and would like to revive it, please do.
+	* tests/surrogate-pair: Remove file.
+	* tests/Makefile.am (TESTS): Remove it.
+
+2018-12-16  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+2018-12-15  Jim Meyering  <meyering@fb.com>
+
+	tests: stack-overflow: handle the case of success without the diagnostic
+	* tests/stack-overflow: Do not always require a stack
+	overflow diagnostic.
+
+	build: update gnulib to latest
+	* gnulib: Update to latest, to pull in code that now compensates for
+	a bug in glibc-2.27 and prior.
+
+	build: make the autoconf-2.63 requirement explicit
+	* configure.ac: AC_PREREQ: Require 2.63, not 2.59. And quote properly.
+	Autoconf-2.63 has been required for some time via gnulib.
+	This merely makes it explicit.
+
+2018-12-15  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: fix diagnostic typo
+	Fix by Bruno Haible in:
+	https://lists.gnu.org/r/grep-devel/2018-12/msg00003.html
+	* tests/init.cfg (envvar_check_fail): Fix diagnostic.
+
+2018-11-24  Jim Meyering  <meyering@fb.com>
+
+	tests: stack-overflow: avoid false failure
+	* tests/stack-overflow: This test would fail to elicit a stack overflow
+	diagnostic on some OS X systems. Rewrite to iterate, gradually increasing
+	the size of the input regex, stopping when grep emits the desired diagnostic
+	or the size reaches a reasonable limit.
+
+2018-10-16  Jim Meyering  <meyering@fb.com>
+
+	tests: reduce the sole failing test
+	* tests/backref-alt: Significantly reduce abort-inducing input.
+
+	build: update gnulib to latest; also update bootstrap and init.sh
+
+2018-10-13  Jim Meyering  <meyering@fb.com>
+
+	doc: NEWS: mention performance improvements
+	* NEWS (Improvements): Mention them.
+
+2018-10-13  Jim Meyering  <meyering@fb.com>
+
+	grep: triple initial buffer size: 32k->96k
+	Changing 32k to 96k gives a 3-23% performance improvement.
+	All timings ran with this diff on top of commit v3.1-39-g7179b21:
+
+	for n in 32 64 96 128; do
+	  echo n=$n
+	  perl -pi -e 's/(INITIAL_BUFSIZE =) \d+/$1 '$n/ src/grep.c &&
+	    make AM_CFLAGS=-O3 WERROR_CFLAGS= >& makerr-$n &&
+	    for needle in 1f2 1f298lkjskjhahjklkj34; do
+	      echo "  needle=$needle"
+	      for i in $(seq 10); do
+	         env MALLOC_PERTURB_= time -qf%e src/grep $needle w2000
+	      done 2>&1 |sort -g | tee >(head -1|sed 's/^/    /') > .time-${n}KB-$needle
+	    done
+	done
+
+	Tested searchs: search for a short literal pattern that is not
+	present in 9.3GB file containing 2000 copies of /usr/dict/words
+	created via this:
+	  ln -s /usr/share/dict/words k && cat $(yes k|head -2000) > w2000
+	I ran this command:
+	  env MALLOC_PERTURB_= time src/grep 1f2 w2000
+	old(32k) vs new elapsed time, best of 10 trials (gcc-9.0.0 20180831, -O3):
+	 32k  64k  96k(%incr) 128k CPU
+	1.25 1.18 1.16( 7.2) 1.20 i7-4770S@3.10GHz cache=8MB
+	1.21 1.16 1.17( 3.3) 1.19 Xeon(R) E3-1505M v5 @ 2.80GHz cache=8MB
+	2.36 2.29 2.29( 3.0) 2.36 Xeon(R) E5-2680 v4 @ 2.40GHz cache=32MB
+	1.40 1.32 1.31( 6.4) 1.33 i5-6260U @ 1.80GHz cache=4MB
+	1.31 1.26 1.24( 5.3) 1.23 AMD FX(tm)-4100 cache=2MB (with only 1000 copies)
+
+	Searching for a longer string: 1f298lkjskjhahjklkj34
+	2.03 1.76 1.61(20.7) 1.53 i7-4770S@3.10GHz cache=8MB
+	1.95 1.70 1.56(20.0) 1.51 Xeon(R) E3-1505M v5 @ 2.80GHz
+	3.27 2.98 2.84(13.1) 3.02 Xeon(R) E5-2680 v4 @ 2.40GHz
+	2.48 2.12 1.91(23.0) 1.80 i5-6260U @ 1.80GHz cache=4MB
+	1.72 1.54 1.46(15.1) 1.41 AMD FX(tm)-4100 cache=2MB
+
+	* src/grep.c (INITIAL_BUFSIZE): Triple it: 32kB -> 96kB
+
+2018-09-28  Barret Rhoden  <brho@cs.berkeley.edu>  (tiny change)
+
+	maint: fix cross-compiling problem
+	* cfg.mk (PATH): Omit if cross-compiling (Bug#32866).
+
+2018-09-28  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+	grep: fix usage 80-column glitch
+	* src/grep.c (usage): Do not go over 80 columns in the source
+	code, to pacify "make dist".
+
+2018-09-19  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: update bootstrap
+	* bootstrap: Copy from Gnulib.
+
+	maint: fix build failure
+	Problem found by OpenCSW buildbot; the bug also occurs on GNU/Linux
+	build platforms.  The symptom is “system.h:26:24: fatal error:
+	configmake.h: No such file or directory”.  See:
+	https://buildfarm.opencsw.org/buildbot/builders/ggrep-solaris10-sparc/builds/107
+	* bootstrap.conf: Add configmake, a dependency that was formerly brought
+	in only by accident.
+
+2018-09-18  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+2018-08-09  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: fix comment
+
+	tests: backref-alt works with glibc 2.28
+	Problem reported by Jaroslav Skarvada (Bug#32409).
+	* tests/Makefile.am (XFAIL_TESTS) [!USE_INCLUDED_REGEX]:
+	Don’t add backref-alt, since this bug is fixed in glibc 2.28.
+
+2018-05-11  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: “pattern” vs “patterns”
+	* doc/grep.in.1, doc/grep.texi, src/grep.c (usage): Be more
+	careful about saying that an argument or option specifies one or
+	more patterns, not just a single pattern.  Problem reported by Kaz
+	Kylheku (Bug#31400).
+
+	build: update gnulib submodule to latest
+
+2018-04-21  Jim Meyering  <meyering@fb.com>
+
+	maint: fix new syntax-check (sc_long_lines) failure
+	* HACKING: Shorten line by one byte to fit in 80 columns.
+
+	build: update gnulib to latest
+
+2018-04-21  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: fix font typo
+
+	maint: update URLs
+	Mostly this is just changing http: to https:.
+	In one or two places it removes no-longer-useful URLs.
+
+	doc: man-page format fixes
+	* doc/grep.in.1: Fix minor formatting glitches, e.g., extra
+	space after [...] because groff thought it was a sentence end.
+	Problem reported by Ingo Schwarze (Bug#31228#11).
+
+2018-04-20  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: mention encoding errors
+	This attempts to document the encoding-error problem more
+	precisely (Bug#30326).
+	* doc/grep.in.1, doc/grep.texi: Mention that the behavior of
+	patterns like ‘.’ is not specified on encoding errors.
+
+	doc: port better to mandoc
+	* doc/grep.in.1: Check for groff and its macro packages
+	independently, as groff can be used with non-groff macro packages.
+	Use an-ext style macros rather than www.tmac style, as this should
+	be more portable to mandoc.  Problem reported by Laura Morales and
+	Ingo Schwarze (Bug#31228).
+
+2018-02-16  Jim Meyering  <meyering@fb.com>
+
+	maint: avoid new syntax-check failure
+	* cfg.mk (old_NEWS_hash): Update, to accommodate v3.1-20-g63d4174's
+	typo fix.
+
+	doc: clarify that PCRE support is here to stay
+	* doc/grep.texi (grep Programs): Clarify: it's not PCRE support
+	that is experimental, but its combination with --null-data (-z).
+
+2018-02-05  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: fix typo
+
+2018-01-06  Jim Meyering  <meyering@fb.com>
+
+	maint: update gnulib and copyright dates for 2018
+	* gnulib: Update to latest.
+	* all files: Run "make update-copyright".
+	* bootstrap: Update from gnulib.
+
+2017-12-17  Jim Meyering  <meyering@fb.com>
+
+	build: link with -lsigsegv, when c-stack module requires it
+	* src/Makefile.am (grep_LDADD): Add $(LIBCSTACK).
+	Otherwise, on at least Debian and Arch-based systems, linking would
+	fail with diagnostics like these:
+	  c-stack.c:207: undefined reference to `stackoverflow_install_handler'
+	  c-stack.c:216: undefined reference to `sigsegv_install_handler'
+	Reported by Jeremy Feusi.
+
+	build: suppress sig-handler.h's -Wcast-function-type warning
+	* configure.ac (WERROR_CFLAGS): Add -Wno-cast-function-type
+	to suppress warning about sig-handler.h's sa_handler_t cast:
+	sig-handler.h: In function 'get_handler':
+	sig-handler.h:47:12: error: cast between incompatible function\
+	  types from 'void (* const)(int,  siginfo_t *, void *)'\
+	  {aka 'void (* const)(int,  struct <anonymous> *, void *)'}\
+	  to 'void (*)(int)' [-Werror=cast-function-type]
+	     return (sa_handler_t) a->sa_sigaction;
+
+2017-12-16  Jim Meyering  <meyering@fb.com>
+
+	grep: diagnose stack overflow rather than segfaulting
+	* bootstrap.conf (gnulib_modules): Add c-stack.
+	* src/grep.c: Include "c-stack.h".
+	(main): Call c_stack_action (NULL);
+	* tests/stack-overflow: New file.
+	* tests/Makefile.am (TESTS): Add name of new file.
+	* NEWS (Improvements): Mention it.
+	Interestingly, this bug does not afflict grep-2.5.4 or prior,
+	so it appeared to have been introduced with grep-2.6.  However,
+	the origin is in glibc's regexp compiler, and I tracked it to
+	stack-aware parsing that was removed from glibc's regexp in 2002.
+	However, grep-2.5.4 was released in 2009.  That version worked
+	(and still works, now) because it included and (by default) used
+	an old copy of glibc's regexp code.
+	Jeremy Feusi reported the grep segfault in https://bugs.gnu.org/29666.
+	I reported the glibc regexp bug in
+	https://sourceware.org/bugzilla/show_bug.cgi?id=22620
+
+2017-11-26  Stephan T. Lavavej  <stl@nuwen.net>
+
+	grep: fix directory recursion on MS-Windows
+	gnulib recently gained a module, windows-stat-inodes, that fixes
+	directory recursion on MS-Windows. No changes to grep's C sources are
+	required; grep simply needs to request the module during configuration.
+
+	When grep requests this module, its configure script will gain the
+	behavior that was implemented in windows-stat-inodes.m4. This detects
+	mingw and sets WINDOWS_STAT_INODES=1. All other platforms are
+	unaffected, setting WINDOWS_STAT_INODES=0 (which is what's happening
+	in the absence of this patch).
+
+	* bootstrap.conf (gnulib_modules): Add windows-stat-inodes.
+	* NEWS (Bug fixes): Mention it.
+	Thanks to Pär Björklund who diagnosed the problem as involving inodes,
+	and thanks to Václav Haisman who provided the bootstrap.conf patch.
+
+2017-11-25  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: port better to Adélie GNU/Linux 64-bit ppc
+	Problem reported by A. Wilcox (Bug#29446).
+	* src/pcresearch.c (PCRE_EXTRA_MATCH_LIMIT_RECURSION)
+	(PCRE_STUDY_EXTRA_NEEDED): Default to 0.
+	(jit_exec): If we run up against the recursion limit,
+	double it (if possible) and try again.
+	(Pcompile): Also specify PCRE_STUDY_EXTRA_NEEDED so that
+	pc->extra is not null.
+
+2017-11-03  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: omit a dup 'const'
+	* src/grep.c (matchers): Omit duplicate 'const'.
+
+2017-10-13  Bernhard Voelker  <mail@bernhard-voelker.de>
+
+	doc: document the option delimiter '--'
+	* doc/grep.texi (Other options): Do the above.
+	Reported in https://lists.opensuse.org/opensuse/2017-03/msg00411.html
+	This addresses http://bugs.gnu.org/26139
+
+2017-08-21  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+	Pacify GCC 5.4
+	* src/grep.c (grepdesc): Rework to pacify GCC 5.4 warning
+	about logical not.
+
+2017-08-20  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+2017-08-17  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: -L exits with status 0 if a file is selected
+	Problem reported by Anthony Sottile (Bug#28105).
+	* NEWS, doc/grep.texi (Exit Status), src/grep.c (usage): Document this.
+	* src/grep.c (grepdesc): Implement it.
+	* tests/skip-read: Test it.
+
+	build: update gnulib submodule to latest
+
+2017-08-13  Jim Meyering  <meyering@fb.com>
+
+	maint: avoid newly-introduced syntax-check failure
+	* src/grep.c (usage): Shorten --help line to 80, so
+	"make syntax-check" passes once again.
+
+2017-08-03  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: improve -o help
+	* src/grep.c (usage): Document that -o outputs only nonempty
+	matches (Bug#27931).
+
+2017-07-26  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: add Bug#27838 test case
+	* tests/backref-alt: New test case from a fuzzer.
+
+2017-07-25  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: distinguish -w from \<...\>
+	* doc/grep.texi (Matching Control):
+	Give example of why -w differs from \<...\> (Bug#27813).
+
+2017-07-11  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: define Dt string in man page
+	Problem reported by Bjarni I. Gislason via Santiago R.R. (Bug#27651).
+	* doc/grep.in.1 (dT): New macro.
+	(Dt): Define this string.
+
+2017-07-02  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 3.1
+	* NEWS: Record release date.
+
+2017-07-01  Jim Meyering  <meyering@fb.com>
+
+	tests: avoid false failures when run in qemu user mode
+	* tests/filename-lineno.pl: Derive the program name that grep
+	will use in diagnostics, based on a suggestion from Assaf Gordon.
+	* tests/in-eq-out-infloop: Similar: accept an arbitrary "command_name: "
+	prefix on checked diagnostics, rather than requiring "grep: ".
+	* tests/reversed-range-endpoints: Likewise.
+	* tests/write-error-msg: Likewise.
+	Reported by Bruno Haible in http://bugs.gnu.org/27532
+
+2017-06-25  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest
+	* gnulib: Update to latest for these portability fixes:
+	- stat: port to xlc 12.01
+	- xalloc-oversized: port to icc
+
+	doc: fix another typo
+	* doc/grep.texi (File and Directory Selection): Fix typo: s/afer/after/
+
+2017-06-24  Jim Meyering  <meyering@fb.com>
+
+	doc: stop calling --perl-regexp (-P) "highly" experimental
+	Use wording that is less likely to make readers think that
+	support for -P may be removed.
+	* doc/grep.in.1: s/highly experimental/experimental/
+	* doc/grep.texi: Likewise.
+	Suggested by Evan Sheahan.
+
+2017-06-21  Jim Meyering  <meyering@fb.com>
+
+	doc: correct typo
+	* doc/grep.texi (Performance): s/suprisingly/surprisingly/
+
+	gnulib: update to latest
+
+2017-06-21  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: -m no longer cuts off trailing context
+	Problem reported by Markus Jochim (Bug#26254).
+	* NEWS, doc/grep.texi (General Output Control): Document this.
+	* src/grep.c (prpending): Selected lines no longer cut off context.
+	(usage): Say "selected" instead of "matching", where appropriate.
+	* tests/foad1, tests/max-count-vs-context, tests/yesno:
+	Adjust to match new behavior.
+
+2017-05-31  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Document grep performance
+	* doc/grep.texi (Performance): New section.
+
+	build: update gnulib submodule to latest
+
+2017-05-21  Jim Meyering  <meyering@fb.com>
+
+	maint: make the announcement template Cc the devel- list
+	* cfg.mk (announcement_Cc_): Define.
+
+	gnulib: update to latest; and update tests/init.sh
+
+	maint: accommodate GCC7's -Werror=duplicated-branches
+	* src/system.h (IGNORE_DUPLICATE_BRANCH_WARNING): Define.
+	* src/grep.c (grepfile): Use it.
+	* src/kwset.c (bmexec, acexec): Use it.
+
+	maint: update to work with GCC7's -Werror=implicit-fallthrough=
+	* src/system.h (FALLTHROUGH): Define.
+	* src/grep.c (context_length_arg): Use new FALLTHROUGH macro in place
+	of comments
+	(fgrep_to_grep_pattern, try_fgrep_pattern, main): Likewise.
+
+2017-05-13  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest and adapt src/kwset.c
+	* gnulib: Update to latest.
+	* src/kwset.c: Include "verify.h" for use of assume.
+
+2017-03-22  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest for dfa [0-9] performance improvement
+	This pulls in the following change that is very relevant to grep:
+
+	    commit 6afba02d7869d39ed7f61981045ddbdcb2814101
+	    Author: Paul Eggert <eggert@cs.ucla.edu>
+	    dfa: make [0-9] faster in non-C locales
+
+	* gnulib: Update to latest.
+	* NEWS (Improvements): Describe the effect on grep.
+
+2017-03-05  Jim Meyering  <meyering@fb.com>
+
+	build: use $(builddir), not $(srcdir)
+	* cfg.mk (PATH): Use $(builddir), so this also takes effect
+	in a non-srcdir build.  Also, switch ${PATH} syntax to $(PATH).
+
+2017-03-05  Juan Manuel Guerrero  <juan.guerrero@gmx.de>
+
+	build: use $(PATH_SEPARATOR), not ":" to augment PATH
+	* cfg.mk (PATH): Use $(PATH_SEPARATOR), for those systems that
+	use something other than ":".
+	* THANKS.in: Remove name, to avoid syntax-check failure due to
+	the duplicate, now that there is this commit.
+
+2017-02-17  Jim Meyering  <meyering@fb.com>
+
+	maint: fix distcheck failure: remove stale dosbuf.c reference
+	* src/Makefile.am (EXTRA_DIST): Do not attempt to distribute
+	the recently deleted file, dosbuf.c.
+
+	maint: fix new syntax-check errors
+	* po/POTFILES.in: Add lib/xbinary-io.c.
+	* cfg.mk (FILTER_LONG_LINES): Add TODO to the list of exempt files.
+
+2017-02-16  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Fix up recent -U patches
+	Inspired by a suggestion by Eric Blake (Bug#25707#17).
+	* bootstrap.conf (gnulib_modules): Add xbinary-io,
+	and remove binary-io and xfreopen.
+	* doc/grep.texi (Other Options):
+	Fix typo and reword to be a bit more general.
+	* src/grep.c: Include xbinary-io.h instead of xfreopen.h.
+	(grepfile): Open with O_BINARY if binary.
+	(grepdesc): No need for set_binary_mode now.
+	(grep_command_line_arg, main): Set stdin to binary mode if binary.
+	(main): Avoid unnecessary test of stdin == NULL.
+	Use xsetmode instead of xfreopen.
+	* src/system.h: Do not include binary-io.h.
+
+	build: update gnulib submodule to latest
+
+	Simplify -U on MS-Windows by removing guesswork
+	Suggested by Eric Blake (Bug#25707#11).
+	* NEWS, doc/grep.texi: Document this.
+	* src/dosbuf.c: Remove.
+	* bootstrap.conf (gnulib_modules): Add xfreopen.
+	* src/grep.c: Include xfreopen.h, not dosbuf.c.
+	(fillbuf, print_line_head): Do not undossify input.
+	(binary): New static var.
+	(grepdesc): Apply BINARY to input file.
+	(usage): Remove -u help.
+	(main): Set BINARY if -U, and apply it to stdout.  Do nothing if -u.
+	With -f, apply BINARY to input file.
+
+2017-02-16  Eric Blake  <eblake@redhat.com>
+
+	grep: don't forcefully strip carriage returns
+	Commit 5c92a54 made the mistaken assumption that using fopen("rt")
+	on platforms where O_TEXT is non-zero makes sense.  However, POSIX
+	already requires fopen("r") to open a file in text mode, vs.
+	fopen("rb") when binary mode is wanted, and at least on Cygwin,
+	where it is possible to control whether a mount point is binary
+	or text by default (using just "r"), the use of fopen("rt") actively
+	breaks assumptions on a binary mount by silently corrupting any
+	carriage returns that are supposed to be preserved.
+
+	* src/grep.c (main): Never use fopen("rt") (Bug#25707).
+
+2017-02-13  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Update TODO and doc
+	* TODO: Bring up-to-date and fix formatting glitches.
+	* doc/grep.in.1, doc/grep.texi: Fix minor glitches.
+	The above patches should address the same problems that recent
+	Debian doc patches address, albeit in a different way.
+
+2017-02-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: clarify default input (Bug#25651)
+	* doc/grep.in.1:
+	* src/grep.c (usage): Clarify default input when -r.
+	* src/grep.c (usage): Do not bother documenting egrep and fgrep;
+	the manual is enough.
+
+2017-02-09  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 3.0
+	* NEWS: Record release date.
+
+2017-02-08  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: do not mishandle \. in multiple patterns
+	Problem reported by Lars Wendler (Bug#25655).
+	* NEWS: Document this.
+	* src/grep.c (try_fgrep_pattern): Fix typo that prevented
+	keys from being properly updated.
+	* tests/foad1: Test for the bug.
+
+2017-02-07  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Do not assume PCRE 8.20 or later
+	Problem reported by Zube (Bug#25647)
+	* NEWS: Document this.
+	* src/pcresearch.c (struct pcre.com.jit_stack):
+	Declare only if PCRE_STUDY_JIT_COMPILE.
+
+2017-02-06  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.28
+	* NEWS: Record release date.
+
+2017-02-02  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest
+
+2017-02-01  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: tune to avoid memchr2 sometimes
+	Problem noted by Norihiro Tanaka in:
+	http://lists.gnu.org/archive/html/grep-devel/2017-01/msg00027.html
+	Although not enough to restore all the previous performance in the
+	case he noted, it helps significantly.
+	* src/kwset.c (memchr_kwset): Bring back small_heuristic,
+	in a somewhat different form.
+
+2017-01-29  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest
+
+2017-01-23  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: simplify recent kwset change
+	* src/kwset.c (acexec_trans): Simplify.
+
+2017-01-23  Jim Meyering  <meyering@fb.com>
+
+	tests: really add the new test name
+	* tests/Makefile.am (TESTS): Add fgrep-longest.
+
+2017-01-21  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep -Fo could report a match that is not the longest
+	* src/kwset.c (acexec): Fix it.
+	* tests/fgrep-longest: New test.
+	* tests/Makefile.am: Add the test.
+	* NEWS: Mention it.
+
+2017-01-18  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: speed up Aho-Corasick when at most 2 bytes
+	When using Aho-Corasick and all matched strings either begin with
+	the same byte, or begin with one of at most two bytes, use memchr2
+	to search for these matching bytes and apply the Aho-Corasick
+	algorithm only when a memchr2 match is found.  On my platform,
+	this speeds up 'grep -F -e aa -e ba in' by a factor of 7, where
+	the file 'in' was created by 'seq -f %040.0f 10000000 >in'.
+	* src/kwset.c (struct kwset.gc1): Now int, not char.
+	If negative, there is no single terminal byte.  All uses changed.
+	(struct kwset.gc1help): Now int, not char.
+	If negative, memchr2 cannot be used.
+	(kwsprep): Set up gc1 and gc1help from kwset->next, with
+	the new (slightly changed) interpretation.
+	(memchr_kwset): Use memchr2 if possible.
+	Adjust to match new meaning of gc1, gc1help.
+	(memoff2_kwset): Remove; no longer needed.
+	(acexec_trans): Use memchr_kwset when possible, for speed.
+	It now supersedes memoff2_kwset.
+
+	grep: remove Commentz-Walter code
+	This code was not being used, and complicated maintenance.
+	We can bring it back from the repository if it turns out
+	to be useful later.
+	* src/kwset.c (struct kwset.reverse): Remove.  All uses of
+	FOO->reverse replaced by (FOO->kwsexec == bmexec).
+	(kwsalloc): Remove 'reverse' arg, as callers outside this
+	module do not care about algorithm choice.  All callers changed.
+	(kwsprep): When deciding whether to use Boyer-Moore, do not worry
+	about being called twice on the same kwset, as that is not allowed.
+	(cwexec): Remove; it was never called.  All uses removed.
+
+2017-01-17  Jim Meyering  <meyering@fb.com>
+
+	maint: avoid new syntax-check failures
+	* src/kwset.c (struct kwset): Split a line longer than 80.
+	* bootstrap: Update from gnulib. This fixes a new syntax-check
+	failure due to its use of "time stamp".
+
+2017-01-17  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* NEWS: Fix typo.
+
+	* src/kwset.c: Fix comment typo.
+
+	Improve -i performance in typical UTF-8 searches
+	Currently ‘grep -i i’ is slow in a UTF-8 locale, because ‘i’ in
+	the pattern matches the two-byte character 'ı' (U+0131, LATIN
+	SMALL LETTER DOTLESS I) in data, and kwset handles only
+	single-byte character translations, so grep falls back on a slower
+	DFA-based search for all searches.  Improve -i performance in the
+	typical case by using kwset when data are free of troublesome
+	characters like 'ı', falling back on the DFA only when data
+	contain troublesome characters.
+	* src/dfasearch.c (GEAcompile):
+	* src/grep.c (compile_fp_t):
+	* src/kwsearch.c (Fcompile):
+	* src/pcresearch.c (Pcompile):
+	Pattern arg is now char *, not char const *, since Fcompile
+	now reallocates it sometimes.
+	* src/grep.c (all_single_byte_after_folding): Remove.
+	All callers removed.
+	(fgrep_icase_charlen): New function.
+	(fgrep_icase_available, try_fgrep_pattern):
+	Use it, for more-generous semantics.
+	(fgrep_to_grep_pattern): Now extern.
+	(main): Do not free keys, since Fexecute may use them.
+	* src/kwsearch.c (struct kwsearch): New struct.
+	(Fcompile): Return it.  If -i, be more generous about patterns.
+	(Fexecute): Use it.  Fall back on DFA when the data contain
+	troublesome characters; this should be rare in practice.
+	* src/kwset.c, src/kwset.h (kwswords): New function.
+
+	build: update gnulib submodule to latest
+
+2017-01-15  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: prefer ptrdiff_t to size_t
+	The code already cannot handle objects with size greater than
+	SIZE_MAX / 2, so be more honest about it and use ptrdiff_t instead
+	of size_t.  ptrdiff_t arithmetic is signed, which allows for more
+	checking via -fsanitize=undefined.  It also makes the code a tad
+	smaller on x86-64, since it can test for < 0 rather than for ==
+	SIZE_MAX.
+	* src/dfasearch.c (struct dfa_comp.kwset_exact_matches):
+	(kwsmusts, EGexecute):
+	* src/kwsearch.c (Fcompile, Fexecute):
+	* src/kwset.c (struct kwset.kwsexec, kwsincr, memchr_kwset)
+	(memoff2_kwset, bmexec_trans, bmexec, cwexec, acexec_trans)
+	(acexec, kwsexec):
+	* src/kwset.h (struct kwsmatch.index, .offset, .size):
+	Prefer ptrdiff_t to size_t where either will do.
+
+2017-01-11  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: improve comments, mostly in kwset
+	Remove kwset.h comments that are obsolete and seemingly not
+	maintained anyway; people can look in kwset.c instead.
+	Update comments to reflect current behavior better.
+	Cite Faro & Lecroq 2013.  Use GNU style for end-of-sentence.
+
+2017-01-01  Jim Meyering  <meyering@fb.com>
+
+	maint: update gnulib and copyright dates for 2017
+	* gnulib: Update to latest.
+	* all files: Run "make update-copyright".
+
+2016-12-31  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: speed up -x with many patterns
+	* src/kwsearch.c (Fcompile): Improve buffer allocation overhead
+	with -x and multiple patterns.  In the common case where '\n' is
+	the end-of-line byte, avoid copying other than the first and last
+	patterns.
+
+2016-12-31  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest, fixing a parallel getopt test failure
+
+2016-12-29  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: space before paren
+
+	grep: int cleanup in kwset.c
+	This should affect only theoretical bugs with very large inputs.
+	On my platform, this patch shrinks the grep text by 136 bytes.
+	* src/kwset.c: Include intprops.h, for INT_MULTIPLY_WRAPV.
+	(struct trie, struct kwset, kwsalloc, kwsincr, treedelta, kwsprep)
+	(bm_delta2_search, bmexec_trans, cwexec): Prefer ptrdiff_t to int
+	when counts can exceed INT_MAX in large inputs, at least in theory.
+	(hasevery): Use bool for booleans.
+	(bmexec_trans): Avoid undefined behavior on integer overflow.
+
+2016-12-27  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: improve performance with multiple patterns
+	* src/grep.c (main): Avoid fgrep-to-grep conversion for word matching
+	with multiple patterns in single byte locales.
+
+2016-12-27  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* NEWS: Fix typo.
+
+	grep: fix bug with '... | grep pat >> /dev/null'
+	Problem reported by Benno Fünfstück (Bug#25283).
+	* NEWS: Document this.
+	* src/grep.c (drain_input) [SPLICE_F_MOVE]:
+	Don't assume /dev/null is always acceptable output to splice.
+	* tests/grep-dev-null-out: Test for the bug.
+
+2016-12-26  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: minor performance tweak for pure functions
+	* src/search.h (wordchars_size, wordchar_next, wordchar_prev):
+	Declare to be pure.
+
+2016-12-25  Zev Weiss  <zev@bewilderbeest.net>
+
+	grep: move localeinfo to grep.c
+	It's not really dfasearch-specific, and grep.c initializes it, so it
+	seems like the most appropriate "owner".
+
+	* src/dfasearch.c (localeinfo): Remove.
+	* src/grep.c (localeinfo): Add.
+	* src/search.h (localeinfo): Move to new commented section.
+
+2016-12-25  Zev Weiss  <zev@bewilderbeest.net>
+
+	pcresearch: thread safety
+	* src/pcresearch.c (pcre_comp): New struct to hold previously-global
+	state.
+	(jit_exec): Operate on a pcre_comp parameter instead of global state.
+	(Pcompile): Allocate and return a pcre_comp instead of setting global
+	variables.
+	(Pexecute): Operate on a pcre_comp parameter instead of global state.
+
+	kwsearch: thread safety
+	* src/kwsearch.c (Fcompile): Return a kwset_t instead of setting a
+	global variable.
+	(Fexecute): Use a passed-in kwset_t instead of a global variable.
+	(kwset): Remove global variable.
+
+	dfasearch: thread safety
+	* src/dfasearch.c (struct dfa_comp): New struct to hold
+	previously-global variables.
+	(dfawarn): Remove static variable.
+	(kwsmusts): Operate on a dfa_comp parameter instead of global
+	variables.
+	(GEAcompile): Allocate and return a dfa_comp struct instead of setting
+	global variables.
+	(EGexecute): Operate on a dfa_comp parameter instead of global
+	variables.
+	* src/searchutils.c (kwsinit): Replace a static array with a
+	dynamically-allocated one.
+
+2016-12-25  Zev Weiss  <zev@bewilderbeest.net>
+
+	grep: prepare search backends for thread-safety
+	To facilitate removing mutable global state from search backends,
+	compile() functions will return an opaque pointer to backend-specific
+	data, which must then be passed back into the corresponding execute()
+	function.  This is merely a preparatory step changing function
+	signatures and call sites, so the pointers passed & returned are
+	dummies for now and not (yet) actually used.
+
+	* src/grep.c (compile_fp_t): Now returns an opaque pointer (the
+	compiled pattern).
+	(execute_fp_t): Now passed the pointer returned by a compile_fp_t.
+	All call sites updated accordingly.
+	(compiled_pattern): New static variable.
+	* src/dfasearch.c (GEAcompile): Return a void pointer (dummy NULL).
+	(EGexecute): Receive a void pointer argument (unused).
+	* src/kwsearch.c (Fcompile): Return a void pointer (dummy NULL).
+	(Fexecute): Receive a void pointer argument (unused).
+	* src/pcresearch.c (Pcompile): Return a void pointer (dummy NULL).
+	(Pexecute): Receive a void pointer argument (unused).
+	* src/search.h: Update compile/execute function prototypes.
+
+2016-12-24  Jim Meyering  <meyering@fb.com>
+
+	maint: fix "syntax-check" failure
+	* src/grep.c (SEP_STR_GROUP): Declare "static".
+
+2016-12-23  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fix comment in searchutils.c
+
+	grep: improve word checking with UTF-8
+	* src/searchutils.c: Do not include <verify.h>.
+	(word_start): Remove, replacing with ...
+	(sbwordchar): New static var.  All uses changed.
+	(wordchar_prev): Return size_t, not bool, as this generates
+	slightly better code.  Go back faster if UTF-8.
+
+	grep: standardize on localeinfo.multibyte
+	* src/dfasearch.c (EGexecute):
+	* src/grep.c (main):
+	* src/kwsearch.c (Fexecute):
+	* src/pcresearch.c (Pcompile):
+	Prefer localeinfo.multibyte to (MB_CUR_MAX > 1).
+
+	grep: speed up -wf in C locale
+	Problem reported by Norihiro Tanaka (Bug#22357#100).
+	This patch improves the performance on that benchmark on my
+	platform so that grep is now only about 2x slower than grep 2.26,
+	which means it is considerably faster than grep 2.25 and earlier.
+	* src/kwsearch.c (Fexecute):
+	Use wordchars_size to boost performance for this case.
+	* src/search.h, src/searchutils.c (wordchars_size): New function.
+
+	grep: specialize word-finding functions
+	This improves performance a bit.
+	* src/dfasearch.c, src/kwsearch.c (wordchar):
+	Remove; now in searchutils.c.
+	* src/grep.c (main): Call wordinit if -w.
+	* src/search.h: Adjust.
+	* src/searchutils.c: Include verify.h.
+	(word_start): New static var.
+	(wordchar): Move here from dfasearch.c and kwsearch.c.
+	(wordinit, wordchars_count, wordchar_next, wordchar_prev):
+	New functions.
+	(mb_prev_wc, mb_next_wc): Remove.
+	All callers changed to use the new functions instead.
+
+	grep: simplify Fexecute
+	* src/kwsearch.c (Fexecute): Avoid the need for a 'try' local or
+	for a 'goto success'.  Update mb_start to reflect newline found.
+
+	grep: remove C label
+	* src/kwsearch.c (Fexecute): Remove label.
+
+	maint: rewrite to avoid some macros
+	These days, the dangerous powers of C macros are not needed if
+	constants or functions will do just as well.
+	* src/grep.c (SEP_CHAR_SELECTED, SEP_CHAR_REJECTED, SEP_STR_GROUP)
+	(INITIAL_BUFSIZE):
+	* src/kwset.c (DEPTH_SIZE):
+	Now constants, not macros.
+	* src/kwset.c (link): Remove macro. Instead, rename local vars
+	from 'link' to 'cur'.
+	(malloc) [GREP]: Remove macro.  All uses of malloc changed to xmalloc.
+	Omit double-inclusion of xalloc.h.  Do not depend on 'GREP'.
+	(U): Now a function, not a macro.
+	* src/kwset.c, src/searchutils.c (NCHAR): Move this macro to ...
+	* src/system.h: ... here, and make it a constant.
+
+2016-12-20  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fix performance with multiple patterns
+	Problem reported by Jaroslav Skarvada (Bug#22357).
+	* NEWS: Document this and other recent performance fixes.
+	* src/grep.c (E_MATCHER_INDEX): New constant.
+	(all_single_byte_after_folding):
+	New function, split out from fgrep_icase_available.
+	(fgrep_icase_available): Use it.
+	(try_fgrep_pattern): New function, which also uses it.
+	(main): With two or more patterns, use try_fgrep_pattern to fix
+	performance regression.  The number "two" here is just a heuristic.
+
+	grep: simplify matcher configuration
+	* src/grep.c (matcher, compile): Remove static vars.
+	(compile_fp_t): Now takes a 3rd syntax argument.
+	(Gcomppile, Ecompile, Acompile, GAcompile, PAcompile): Remove.
+	(struct matcher): Now nameless, since it is used only once.
+	Make 'name' a bit shorter.  New member 'syntax'.
+	(matchers): Initialize it, and change removed functions to GEAcompile.
+	(F_MATCHER_INDEX, G_MATCHER_INDEX): New constants.
+	(setmatcher): New arg MATCHER, and return new matcher index.
+	Avoid unnecessary call to strcmp.
+	(main): Keep matcher as a local int, not a global pointer.
+	* src/kwsearch.c (Fcompile):
+	* src/pcresearch.c (Pcompile): Ignore the 3rd syntax argument.
+
+	grep: simplify line counting in patterns
+	* src/grep.c (n_patterns): Rename from patfile_lineno,
+	as it is now origin-zero.  Now size_t, not uintmax_t.
+	(count_nl_bytes, fl_add): Simplify to just buffer and size.
+	All callers changed.
+
+2016-12-19  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+2016-12-18  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+	build: update gnulib submodule to latest
+
+2016-12-13  Jim Meyering  <meyering@fb.com>
+
+	tests: use just-built grep in more places
+	* cfg.mk (PATH): Prepend $(srcdir)/src, so that we use the just-
+	built grep also when running commands like those of "make distcheck".
+	This would have avoided the recently-luckily-noticed infloop bug.
+	Tested by running this in a just-built directory:
+	f=src/grep; printf '%s\n' '#!/bin/sh' 'sleep 9h' > $f; chmod a+x $f
+	and then verifying that nearly every "make syntax-check" rule hangs.
+
+	maint: tell "syntax-check" not to worry about the NEWS update
+	Whenever we change "old" NEWS, we have to update this checksum.
+	Otherwise, a "make syntax-check" test that guards against a class
+	of logical merge conflicts will fail.
+	* cfg.mk (old_NEWS_hash): Update this hash to accommodate the
+	recent clarification of a 2.27 NEWS entry.
+
+2016-12-13  Arnold D. Robbins  <arnold@skeeve.com>
+
+	build: update gnulib submodule to latest
+	* src/dfasearch.c (GEAcompile): Remove use of flag, RE_ICASE covers it.
+
+2016-12-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: work around proc lseek glitch
+	Problem reported by Andreas Schwab (Bug#25180).
+	* NEWS: Document this.
+	* src/grep.c (finalize_input): Ignore EINVAL lseek failures.
+	* tests/Makefile.am (TESTS): Add proc.
+	* tests/proc: New file.
+
+2016-12-07  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: simplify finalize_input
+	* src/grep.c (finalize_input): Simplify without changing behavior.
+	It's still a bit of a rat's-nest, but it's a cozier rat's-nest.
+
+	maint: clarify early-exit news for 2.27
+	* NEWS: Mention early-exit options to avoid confusion.  See:
+	http://lists.gnu.org/archive/html/grep-devel/2016-12/msg00007.html
+
+2016-12-06  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.27
+	* NEWS: Record release date.
+
+2016-11-29  Jim Meyering  <meyering@fb.com>
+
+	grep: fix DFA-induced infloop
+	* gnulib: Update to latest, for the DFA infloop fix.
+	* tests/dfa-infloop: New test, to trigger an infinite loop
+	in the DFA matcher.
+	* tests/Makefile.am (TESTS): Add it.
+
+2016-11-28  Jim Meyering  <meyering@fb.com>
+
+	tests: use "returns_ N env VAR=val ..."
+	rather than "VAR=val returns_ N ..."
+	Some shells do not propagate envvar settings through our use
+	of the "returns_" function, so set any envvar via use of "env".
+	This was an issue at least on Ubuntu and Debian-based systems,
+	presumably due to their common use of "dash" as /bin/sh.
+	Reported by Assaf Gordon.
+	* tests/char-class-multibyte: As above.
+	* tests/euc-mb: Likewise.
+	* tests/false-match-mb-non-utf8: Likewise.
+	* tests/pcre-infloop: Likewise.
+	* tests/pcre-jitstack: Likewise.
+	* tests/sjis-mb: Likewise.
+	* tests/warn-char-classes: Likewise.
+
+2016-11-28  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: revert check for unibyte French range bug
+	The test wasn't portable, as it assumed that rational ranges
+	were not in effect.  Problem reported by Eric Blake (Bug#25048#8).
+	There doesn't seem to be a portable way to do the test, so omit it.
+	* tests/init.cfg, tests/unibyte-bracket-expr:
+	Revert previous change.
+
+	build: update gnulib submodule to latest
+
+2016-11-27  Jim Meyering  <meyering@fb.com>
+
+	grep: avoid false matches in non-UTF8 multibyte locales
+	* gnulib: Update to latest, for the dfa.c fix.
+	* NEWS (Bug fixes): Mention it.
+	* tests/false-match-mb-non-utf8: New file, with tests for this.
+	Based on tests from Stephane Chazelas.
+	* tests/Makefile.am (TESTS): Add it.
+	Introduced by commit v2.18-54-g3ef4c8e, a change that made grep use
+	its DFA matcher more aggressively.  The malfunction arises only with
+	the DFA matcher, not with regex.
+	Reported by Stephane Chazelas in https://bugs.gnu.org/24975
+
+2016-11-20  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: check for unibyte French range bug
+	Problem reported by Stephane Chazelas (Bug#24973).
+	This bug was fixed in Gnulib.
+	* NEWS: Document the fix.
+	* tests/init.cfg (require_ru_RU_koi8_r): Remove.
+	* tests/unibyte-bracket-expr: Add a test for the bug.
+	Call get-mb-cur-max directly instead of bothering with
+	require_ru_RU_koi8_r.
+
+	build: update gnulib submodule to latest
+
+2016-11-19  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: further -P performance fix
+	Problem reported by Stephane Chazelas in:
+	http://bugs.gnu.org/22655#103
+	* src/pcresearch.c (Pexecute): Set the subject to the start of
+	each line as it is found.
+
+	grep: -P no longer uses PCRE_MULTILINE
+	This reverts commit f6603c4e1e04dbb87a7232c4b44acc6afdf65fef,
+	as the extra performance is not worth the trouble for PCRE users.
+	Problem reported by Stephane Chazelas in:
+	http://bugs.gnu.org/22655#103
+	* NEWS: Document this and the next patch.
+	* src/dfasearch.c (EGexecute):
+	* src/grep.c (execute_fp_t):
+	* src/kwsearch.c (Fexecute):
+	* src/pcresearch.c (Pexecute):
+	First arg is now a const pointer again.
+	* src/grep.c (buf_has_encoding_errors): Now static.
+	* src/grep.h (buf_has_encoding_errors): Remove decl.
+	* src/search.h: Adjust decls.
+	* src/pcresearch.c (reflags): Remove.  All uses removed.
+	(Pcompile, Pexecute): Do not use PCRE_MULTILINE.
+
+2016-11-19  Jim Meyering  <meyering@fb.com>
+
+	doc: fix a doubled "the"
+	* doc/grep.texi (--perl-regexp): s/the\nthe/the/
+
+2016-11-19  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fix -zxP bug
+	* NEWS: Document this.
+	* src/pcresearch.c (Pcompile): Search a line at a time if -x is
+	used, since -x uses ^ and $.
+	* tests/pcre: Test this.
+
+	grep: simplify by using PRIuMAX
+	* configure.ac (HAVE_PRINTF_C99_SIZES): Remove; no longer needed.
+	* src/grep.c (print_offset): Simplify (Bug#24451).
+
+	grep: -T now adjusts number widths for worst case
+	* NEWS, doc/grep.texi (Output Line Prefix Control):
+	Document this (Bug#24451).
+	* src/grep.c (offset_width): New static var.
+	(print_offset): Use it instead of arg.  All callers changed.
+	(grep): Set it.
+	* tests/initial-tab: Test this.
+
+	grep: -T no longer outputs BS
+	* NEWS: Document this (Bug#24451).
+	* src/grep.c (print_line_head): Do not attempt to backspace output.
+	* tests/initial-tab: New test.
+	* tests/Makefile.am (TESTS): Add it.
+
+	grep: document -oz better
+	* doc/grep.texi (General Output Control, Usage): Tweak (Bug#24961).
+
+	grep: fix performance typo with -P
+	Reported by Zev Weiss in: http://bugs.gnu.org/22655#88
+	* src/pcresearch.c (Pcompile): Initialize reflags.
+
+	tests: use "returns_" rather than "$?"
+	* tests/grep-dev-null-out: Use "returns_ 124" rather than testing
+	$? = 124.
+
+	grep -f /dev/null -L PAT FILE outputs FILE
+	* NEWS: Document this.
+	* src/grep.c (main): Do not exit right away with -L.
+	* tests/skip-read: Test for the fix.
+
+	grep: tune -f /dev/null
+	* src/grep.c (main): Do the -f /dev/null early-exit checks before
+	more-expensive tests that involve syscalls.
+
+	grep: treat -f /dev/null like -m0
+	* NEWS: Document this.
+	* src/grep.c (main): With -f /dev/null, don't bother to read the
+	input.  This is what FreeBSD grep does.
+	* tests/Makefile.am (TESTS): Add skip-read.
+	* tests/skip-read: New file.
+
+	grep: avoid O(N**2) buffer reallocation
+	* src/grep.c (main): Use x2realloc to avoid O(N**2) performance as
+	pattern buffers grow.
+
+	grep: avoid unnecessary gettext call
+	Translate "(standard input)" lazily.
+	* src/grep.c (input_filename): New function.
+	(suppressible_error): Remove 1st arg, since it is always
+	input_filename ().  All callers changed.
+	(suppressible_error, print_filename, grep, grepdesc): Use it.
+	(grep_command_line_arg): Set filename to NULL if standard
+	input has no label.  Often, this avoids all calls to gettext,
+	which can be a win as the first call can be expensive.
+
+	grep: drain the input pipe faster
+	* src/grep.c (dev_null_output): Now static.
+	(drain_input): New function, using 'splice' if that makes sense.
+	(finalize_input): Use it.
+	(main): Omit now-unnecessary initialization.
+
+	grep: scale back /dev/null speedup
+	The performance improvement when output is /dev/null (commit
+	af6af288eac28951b5eee1eaaf373e22b2193b7b dated 2016-05-01)
+	breaks scripts that run "PROGRAM | grep PATTERN >/dev/null"
+	where PROGRAM dies when writing into a broken pipe.
+	Suppress the improvement if standard input is not seekable.
+	Problem reported by Gary Johnson (Bug#24941).
+	* NEWS: Document this.
+	* src/grep.c (seek_failed): New static var.
+	(seek_data_failed): Move decl earlier, to be next to seek_failed.
+	(file_must_have_nulls): Skip useless syscalls if seek_failed.
+	Lessen source-code nesting.
+	(reset): Set seek_failed and seek_data_failed.
+	Try lseek even on non-regular files.
+	(grep): New arg INEOF.  All callers changed.
+	Do not clear seek_data_failed here, since 'reset' now does this.
+	(finalize_input): New static function.
+	(grepdesc): Use it.
+	(main): Do not exit on first match merely because output is
+	/dev/null.
+	* tests/grep-dev-null-out: Adjust to new behavior.
+
+	grep: improve diagnostic on lseek failure
+	* src/grep.c (reset): Mention the file name in the (unlikely)
+	chance of an lseek failure.
+
+	grep: avoid unnecessary isatty calls
+	This fixes an inefficiency that was mistakenly introduced a while
+	back, when the macro SET_BINARY became defined on all platforms.
+	* src/grep.c (grepdesc, main): Do not unecessarily call isatty on
+	POSIXish platforms.
+
+	grep: -Pz no longer rejects ^, $
+	Problem reported by Stephane Chazelas (Bug#22655).
+	* NEWS: Document this.
+	* doc/grep.texi (grep Programs): Warn about -Pz.
+	* src/pcresearch.c (reflags): New static var.
+	(multibyte_locale): Remove static var; now local to Pcompile.
+	(Pcompile): Check for (? and (* too.  Set reflags instead of
+	dying when problematic operators are found.
+	(Pexecute): Use reflags to decide whether searches should
+	be multiline.
+	* tests/pcre: Test new behavior.
+
+2016-11-14  Jim Meyering  <meyering@fb.com>
+
+	tests: use "returns_" rather than explicit comparison with "$?"
+	* tests/sjis-mb (encode): Rearrange to emit desired input into
+	a file, rather than piping directly into grep.  That permits
+	the use of returns_ 1 to verify timeout's exit status.
+	* tests/euc-mb: Use "returns_ 1" rather than testing $? = 1
+	* tests/char-class-multibyte: Likewise.
+	* tests/dfa-heap-overrun: Likewise.
+	* tests/encoding-error: Likewise.
+	* tests/fedora: Likewise.
+	* tests/grep-dev-null: Likewise.
+	* tests/init.cfg (envvar_check_fail): Likewise.
+	* tests/kwset-abuse: Likewise.
+	* tests/mb-non-UTF8-overrun: Likewise.
+	* tests/multibyte-white-space: Likewise.
+	* tests/pcre-infloop: Likewise.
+	* tests/surrogate-pair: Likewise.
+	* tests/warn-char-classes: Likewise.
+	Do the same for other values:
+	* tests/backref-multibyte-slow: Likewise.
+	* tests/euc-mb: Likewise.
+	* tests/pcre-abort: Likewise.
+	* tests/pcre-jitstack: Likewise.
+	* tests/repetition-overflow: Likewise.
+	* tests/reversed-range-endpoints: Likewise.
+	* tests/warn-char-classes: Likewise.
+
+2016-10-26  Jim Meyering  <meyering@fb.com>
+
+	doc: grep builds on HP-UX once again
+	* NEWS (Bug fixes): Mention the HP-UX fix.
+
+	gnulib: update to latest, for getprogname HPUX port
+
+2016-10-22  Mark Veltzer  <mark.veltzer@gmail.com>
+
+	ignore coverage generated files
+
+	ignore ar-lib in build-aux
+
+2016-10-20  Zev Weiss  <zev@bewilderbeest.net>
+
+	grep: use 'j' intmax_t printf length modifier if supported
+	* configure.ac: Use gl_PRINTF_SIZES_C99 to test printf and
+	(conditionally) define HAVE_PRINTF_C99_SIZES.
+	* src/grep.c (print_offset): Use printf("%j...") for printing
+	[u]intmax_t if HAVE_PRINTF_C99_SIZES is defined; otherwise continue
+	using the existing hand-rolled loop.
+
+2016-10-15  Jim Meyering  <meyering@fb.com>
+
+	build: distribute new file, die.h, so "make distcheck" passes
+	* src/Makefile.am (grep_SOURCES): Add die.h.
+	Also, sort these file names.
+
+2016-10-10  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+2016-10-09  Jim Meyering  <meyering@fb.com>
+
+	maint: die.h: add the "#define ..." part of double inclusion guard
+	* src/die.h (DIE_H): Define to 1.
+
+2016-10-04  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: don't assume stdbool.h before die call
+	* src/die.h: Include stdbool.h, since 'die' uses 'false'
+
+	grep: die more systematically
+	* src/die.h: New file.
+	* src/dfasearch.c, src/grep.c, src/pcresearch.c: Include die.h.
+	* src/dfasearch.c (dfaerror):
+	* src/grep.c (context_length_arg, add_count, prline, setmatcher, main):
+	* src/pcresearch.c (jit_exec, Pcompile, Pexecute):
+	Use 'die' instead of 'error' when exiting.
+	* src/pcresearch.c: Do not include verify.h.
+	(die): Remove; now in die.h.
+	* src/search.h: Do not include error.h here, since this file does
+	not use anything defined in error.h.  Instead, dfasearch.c, which
+	uses error.h's symbols, now includes error.h directly.
+
+2016-10-02  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.26
+	* NEWS: Record release date.
+
+2016-10-01  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest; for getprogname fix
+
+2016-10-01  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests/grep-dir: port to Solaris 10
+	* tests/grep-dir: Port to Solaris 10 'cat', which
+	exits with status 0 even after 'read' fails from a directory.
+
+2016-09-28  Jim Meyering  <meyering@fb.com>
+
+	build: placate GCC 7's -Wimplicit-fallthrough
+	* src/pcresearch.c (die): New macro.
+	(Pexecute): Use it in place of offending uses of error,
+	to placate GCC 7's -Wimplicit-fallthrough.
+	Include verify.h.  Since this is grep's first explicit use of this
+	gnulib module, ...
+	* bootstrap.conf (gnulib_modules): Add verify.
+
+	gnulib: update to latest; for ...
+	This includes the following:
+	 - a getprogname-vs-openbsd-5.1 portability fix
+	 - "fallthru" comment-adding changes for dfa and unistr/u8-uctomb-aux.c
+	 - another getprograme fix to avoid breaking newer glibc
+
+2016-09-27  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: reword .git old-GCC warning
+	* configure.ac (gl_gcc_warnings): Reword diagnostic.
+	Suggested by Assaf Gordon in:
+	http://lists.gnu.org/archive/html/grep-devel/2016-09/msg00024.html
+
+	build: port .git builds to newer GCC
+	* configure.ac (gl_gcc_warnings): Omit duplicate copy of 'main'.
+	Problem reported by Assaf Gordon in:
+	http://lists.gnu.org/archive/html/grep-devel/2016-09/msg00024.html
+
+	build: port .git builds to older GCC
+	Problem reported by Dagobert Michelsen in:
+	http://lists.gnu.org/archive/html/grep-devel/2016-09/msg00018.html
+	* configure.ac (gl_gcc_warnings): Default to false if .git
+	exists but GCC is too old.
+
+2016-09-27  Jim Meyering  <meyering@fb.com>
+
+	tests/long-pattern-perf: avoid false-failure due to cache speed
+	* tests/long-pattern-perf: This test would fail semi-consistently
+	on some systems, probably because the smaller regexp fit well
+	within cache, yet the larger one did not.  In that case, there
+	was a relative speed difference greater than 20x and the test
+	would fail.  Quadruple the sizes, to make that less likely.
+	Also, construct the 10x larger regexp directly from the smaller,
+	rather than relying on seq with endpoints to induce that
+	approximate size ratio.  Reported by Bruce Dubbs in
+	https://lists.gnu.org/archive/html/grep-devel/2016-09/msg00013.html
+
+2016-09-24  Jim Meyering  <meyering@fb.com>
+
+	build: avoid "./configure && make dist" missing-dep. failure
+	* Makefile.am (run-syntax-check): Depend on "all", to avoid a
+	parallel build failure due to a missing dependency. Reported by
+	Paul Eggert in https://bugs.gnu.org/24256#50
+
+2016-09-24  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+2016-09-24  Jim Meyering  <meyering@fb.com>
+
+	tests/fmbtest: avoid false-failure due to reliance on MB-correct sed
+	* tests/fmbtest: Several of these tests would mistakenly fail due to
+	postprocessing with a combination of sed and locale support that failed
+	to handle some multibyte characters in the cs_CZ.UTF-8 locale.  Instead
+	of relying on sed's multibyte support or anything locale-related to
+	perform this simple filtering, just use this: tr -cs '0-9' '[ *]'
+	Also, rather than exporting LC_ALL, just set it for each command.
+	Reported by Nelson H. F. Beebe.
+	https://bugs.gnu.org/24534
+
+	tests: revamp multibyte-white-space test to be more permissive
+	This test elicits too many failures.  Whether a system has accurate
+	unicode "whitespace" attributes should not influence whether grep's
+	test suite passes.  In many cases, now you will see a warning that
+	some multibyte characters do not pass whitespace-related tests, but
+	this test no longer fails.  However, if you run this test on a modern
+	enough system, it does require that \s and \S do work properly with
+	most of the listed characters.
+	* tests/multibyte-white-space: Confirm that Fedora 24's locale
+	tables still declare those four Unicode code points *not* whitespace.
+	Honor a new column telling how to handle failure.  Provide more
+	information in each diagnostic.
+	Reported by Nelson H. F. Beebe.
+	https://bugs.gnu.org/24530
+
+	tests: avoid erroneous failure of pcre-jitstack test
+	On some systems (*BSD), 'ulimit -s unlimited' would fail, yet the
+	test for that mistakenly masked the failure, so the following grep
+	command ended up failing with a segfault.
+	* tests/pcre-jitstack: Don't mask the ulimit failure.
+	Reported privately by Nelson H. F. Beebe.
+	https://bugs.gnu.org/24524
+
+2016-09-23  Jim Meyering  <meyering@fb.com>
+
+	grep: avoid unwarranted "input file 'F' is also the output" on *BSD
+	On *BSD systems, any command like "echo y | grep x", where grep reads
+	from a pipe and writes to standard output, would mistakenly emit this:
+	  grep: input file '(standard input)' is also the output
+	* src/grep.c (grepdesc): Ensure that the file descriptor we're
+	reading is a regular one before using SAME_INODE to test whether
+	it is the same as the descriptor open on standard output.
+	Nelson Beebe reported privately that the foad1 tests failed on many
+	BSD systems.  Exposed by commit v2.25-2-gaf6af28.
+	https://bugs.gnu.org/24522
+
+	tests: avoid backref-multibyte-slow false failure
+	* tests/backref-multibyte-slow (max_seconds): If we calculate
+	a max duration of 1 second, use 5.  Otherwise, on high-latency
+	systems, it would be way too easy for the duration of the final
+	test run to exceed that limit.  Reported by Nelson H. F. Beebe.
+	http://bugs.gnu.org/24516
+
+2016-09-22  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest; for getprogname-vs-AIX fix
+
+2016-09-18  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: add news entry for fix to bug#24233
+	* NEWS (Bug fixes): Add an entry describing bug#24233.
+	The bug was fixed by commit v2.25-77-gad468bb, by chance.
+
+2016-09-15  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest
+
+2016-09-10  Jim Meyering  <meyering@fb.com>
+
+	dfa: reflect move of grep's DFA code to gnulib
+	Now that the core DFA code and tests reside in gnulib,
+	remove the copies here and use what gnulib provides.
+	* bootstrap.conf: Use the dfa module.
+	* cfg.mk: Remove settings involving files that have moved.
+	(_gl_TS_unmarked_extern_functions): Add dfaerror and dfawarn.
+	It is wrong/ugly to have to define these global symbols to use
+	the dfa module, but we'll adjust that separately.
+	* po/POTFILES.in: Apply s/src/lib/ to src/dfa.c.
+	* src/Makefile.am: Remove mention of dfa.[ch] and localeinfo.[ch].
+	* tests/Makefile.am: Remove mention of the tests that we have
+	moved to the gnulib module.
+	* src/dfa.c: Remove file.
+	* src/dfa.h: Likewise.
+	* src/localeinfo.c: Likewise.
+	* src/localeinfo.h: Likewise.
+	* tests/dfa-match: Likewise.
+	* tests/dfa-match-aux.c: Likewise.
+	* tests/invalid-char-class: Likewise.
+
+	gnulib: update to latest, for new dfa module
+
+2016-09-08  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: encoding errors suppress just their line
+	From a suggestion by Marcello Perathoner (Bug#22838).
+	* NEWS, doc/grep.texi (File and Directory Selection): Document this.
+	* src/grep.c (print_line_head): Do not suppress later output lines
+	merely because an earlier output line would have had an encoding error.
+	* tests/encoding-error: Test for the new behavior.
+
+2016-09-08  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest, for getprogname fixes
+
+2016-09-08  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: additional change new option for anchored searches
+	* src/dfa.c (dfaexec_main): Do it.
+
+2016-09-07  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: define "context lines"
+	Reported by Igor Bogomazov via Santiago Ruano Rincón (Bug#24024).
+	* doc/grep.texi (Context Line Control): Define "context lines".
+
+	build: update gnulib submodule to latest
+
+2016-09-05  Jim Meyering  <meyering@fb.com>
+
+	maint: switch from gnulib's progname to getprogname module
+	* gnulib: Update to latest, for its new getprogname module.
+	* bootstrap.conf (avoided_gnulib_modules): Include the getprogname
+	module rather than the now-obsolescent progname.
+	* src/grep.c: Include "getprogname.h" rather than "progname.h"
+	and remove any use of set_program_name.
+	* tests/dfa-match-aux.c (main): Likewise.
+	* tests/get-mb-cur-max.c (main): Likewise.
+	* src/grep.c (usage, main): Use getprogname() in place of program_name.
+
+2016-09-02  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: minor cleanup of previous change
+	* src/dfa.c (dfaexec_main): Omit redundant code and reindent.
+
+2016-09-02  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: additional change new option for anchored searches
+	* src/dfa.c (dfaexec_main): Do it.
+
+	dfa: use single-byte algorithm even in non-UTF-8
+	* src/dfa.c (dfaexec_main): Do it.  (This was inadvertently
+	omitted in a recent patch.)
+
+2016-09-02  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: merge xalloc.h changes from Gawk
+	* src/dfa.h (_GL_ATTRIBUTE_MALLOC): Define here, as other
+	Gnulib .h files do.  This is more consistent with Gawk.
+	* src/dfa.c: Include xalloc.h, since dfa.h no longer does so.
+	Include localeinfo.h later; we don't care about order, but Gawk does.
+
+2016-09-02  Arnold Robbins  <arnold@skeeve.com>
+
+	dfa: port to C90
+	* src/dfa.c (dfamust): Avoid declarations after statement (Bug#21486).
+
+2016-09-02  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: new option for anchored searches
+	This follows up on a suggestion by Norihiro Tanaka (Bug#24262).
+	* src/dfa.c (struct regex_syntax): New member 'anchor'.
+	(char_context): Use it.
+	(dfasyntax): Change signature to specify it, along with the old
+	FOLD and EOL args, as a single DFAOPTS arg.  All uses changed.
+	* src/dfa.h (DFA_ANCHOR, DFA_CASE_FOLD, DFA_EOL_NUL): New constants
+	for dfasyntax new last arg.
+
+2016-09-02  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: simplify and optimize at initial state in execution
+	* src/dfa.c (skip_remains_mb): Remove argument *pwc.  Update calller.
+	(dfaexec_main): Simplify and optimize at initial state (Bug#24261).
+
+	dfa: simplify to find state index for state 0
+	* src/dfa.c (dfastate): Simplify to find state index for state 0.
+
+2016-09-01  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	tests: add a new test for SJIS locale
+	* tests/sjis-mb: Add a new test.  It fails in grep-2.25 or prior.
+
+2016-09-01  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: update NEWS
+	* NEWS: Describe previous change.
+
+	grep: use regex fastmap unless -i
+	This builds on a suggestion by Norihiro Tanaka (Bug#24009).
+	* src/dfasearch.c (GEAcompile): Use a fastmap unless -i.
+	This improves performance 20x for me using the first benchmark
+	given in Bug#24009.
+
+	grep: improve dfasearch storage management
+	This patch is mostly refactoring, with a bit of performance tweaking.
+	It is done in preparation for a fix for Bug#24009.
+	* src/dfasearch.c (patterns): Now of type struct re_pattern_buffer *
+	instead of an anonymous struct pointer, since there is no longer
+	any need to keep regs here.  All uses changed.
+	(GEAcompile): Use patlim instead of a hard-to-follow "total".
+	Use x2nrealloc to avoid potential O(N**2) reallocation algorithm.
+	Initialize just the pattern members that need clearing.
+	(EGexecute): Put regs into a static variable, as this code did
+	before 2001-02-18, as there is no need to have a separate set of
+	regs for each pattern.  Explain the "Q@#%!#" comment better.
+
+2016-09-01  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: remove separation by context in transition in non-UTF8 multibyte locales
+	* src/dfa.c (struct dfa): Remove member curr_dependent.  All uses
+	removed.
+
+2016-09-01  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: document previous change
+	* NEWS: Adjust to match previous change.
+
+2016-09-01  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: avoid invalid character matching period
+	* dfa.c (transit_state): Avoid invalid character matching period.
+
+	dfa: use single-byte algorithm even in non-UTF-8
+	Even in non-UTF8 locales, if the current input character
+	is single byte, we can use CSET to match ANYCHAR.
+	* src/dfa.c (struct dfa): New member canychar.
+	Cache index of CSET for ANYCHAR.
+	(lex): Make CSET for ANYCHAR.
+	(state_index): Simplify.
+	(dfastate): Consider CSET for ANYCHAR.
+	(transit_state_singlebyte, transit_state): Remove handling for eolbyte,
+	as we assume that eolbyte does not appear at current position.
+	(dfaexec_main): Use algorithm for single byte character to any single
+	byte character in input text always.
+	(dfasyntax): Initialize canychar.
+
+2016-09-01  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: avoid code duplication with -iF
+	This follows up on the -iF performance improvement (Bug#23752).
+	* NEWS: Simplify description of -iF improvement.
+	* src/dfa.c: Do not include wctype.h.
+	(lonesome_lower, case_folded_counterparts): Move to localeinfo.c.
+	(CASE_FOLDED_BUFSIZE): Move to localeinfo.h.
+	* src/grep.c: Do not include wctype.h.
+	(lonesome_lower): Remove.
+	(fgrep_icase_available): Use case_folded_counterparts instead.
+	Do not call it for the same character twice.
+	Return false on wcrtomb failures (which should never happen).
+	(fgrep_to_grep_pattern, main): Simplify.  Let fgrep_to_grep’s
+	caller fiddle with the global variables.
+	* src/localeinfo.c: Include <wctype.h>
+	(lonesome_lower, case_folded_counterparts):
+	Move here from src/dfa.c.  Return int, not unsigned int.
+	Verify that CASE_FOLDED_BUFSIZE is big enough.
+	* src/localeinfo.h (CASE_FOLDED_BUFSIZE): Now 32, so that
+	we don’t expose lonesome_lower’s size.
+	* src/searchutils.c (kwsinit): Return new kwset instead of
+	storing it via a pointer.  All callers changed.  Simplify a bit.
+
+2016-09-01  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: speed up -iF in multibyte locales
+	In a multibyte locale, if a pattern is composed of only single byte
+	characters and their all counterparts are also single byte characters
+	and the pattern does not have invalid sequences, grep -iF uses the
+	fgrep matcher, the same as in a single byte locale (Bug#23752).
+	* NEWS: Mention it.
+	* src/grep.c (lonesome_lower): New constant.
+	(fgrep_icase_available): New function.
+	(fgrep_to_grep_pattern): Simplify it.
+	(main): Use them.
+	* src/searchutils.c (kwsinit): New arg MB_TRANS; all uses changed.
+	Try fgrep matcher for case insensitive matching by grep -F in multibyte
+	locale.
+
+2016-08-31  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+2016-08-31  Jim Meyering  <meyering@fb.com>
+
+	maint: avoid new 'make syntax-check' failure
+	* src/dfa.c (using_simple_locale): Prefer STREQ(a,b) over
+	strcmp(a,b) == 0.
+
+	gnulib: update to latest
+
+2016-08-31  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: make dfa.c fully thread-safe
+	This follows up on Zev Weiss’s recent patches to make the DFA code
+	thread-safe (Bug#24249).  It removes the remaining static
+	variables used by dfa.c.  These variables are locale-dependent, so
+	they would cause problems in multithreaded code where different
+	threads are in different locales (e.g., via uselocale).  I
+	abstracted most of the variables into a new localeinfo module.
+	* src/Makefile.am (grep_SOURCES): Add localeinfo.c.
+	(noinst_HEADERS): Add localeinfo.h.
+	* src/dfa.c: Include localeinfo.h.
+	(struct dfa): Remove multibyte member, as it is now part of
+	localeinfo.  New members simple_locale and localeinfo.
+	Put locale-related members at the end.
+	(mbrtowc_cache): Remove; now part of dfa->localeinfo.
+	(charclass_index): Rename back from dfa_charclass_index,
+	since it's private.
+	(unibyte_word_constituent): New arg DFA; use its sbctowc member.
+	(using_utf8, dfa_using_utf8, init_mbrtowc_cache, check_utf8):
+	Remove; now done by localeinfo members.  All uses changed.
+	(dfasyntax): New localeinfo arg.  Move to end to avoid forward decls.
+	Initialize the entire DFA.
+	(unibyte_c, check_unibyte_c): Remove; now in simple_locale member.
+	(using_simple_locale): Now takes bool instead of DFA.
+	Do the locale check here, rather than in the caller,
+	as the result is now cached in dfa->simple_locale.
+	(dfaalloc): Just allocate the DFA.  dfasyntax now initializes it.
+	* src/dfa.h: Add forward decl of struct localeinfo.
+	Adjust to new dfa.c API.
+	* src/dfasearch.c (localeinfo): New var, replacing former static
+	vars like mbrtowc_cache.
+	* src/localeinfo.c, src/localeinfo.h: New files.
+	* src/search.h: Include localeinfo.h.
+	(localeinfo): New decl.
+	* src/searchutils.c (mbclen_cache, build_mbclen_cache):
+	Remove.  All uses changed to localeinfo.
+	* tests/Makefile.am (dfa_match_aux_LDADD): Add localeinfo.o.
+	* tests/dfa-match-aux.c: Include localeinfo.h.
+	(main): Adjust to changes in DFA API.
+
+2016-08-28  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+	This should fix Bug#24323 reported by Dennis Clarke, where grep
+	does not build on Solaris 10 when compiled with Solaris Studio 12.4.
+
+2016-08-23  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: minor thread-safety cleanups
+	* src/dfa.c (struct lexer_state): Rename lexptr to ptr and lexleft
+	to left, for brevity.  All uses changed.
+	(struct dfa): Rename lexstate to lex and parsestate to parse,
+	for brevity.  All uses changed.
+	(using_simple_locale): Simplify boolean expression.
+	(FETCH_WC): Parenthesize uses of dfa macro arg.
+	(FETCH_WC, parse_bracket_exp, addtok_mb): Prefer suffix operators
+	on structure members when possible, for clarity.
+	(parse_bracket_exp): Check for buffer exhaustion before
+	dereferencing buffer pointer.
+	(struct lexptr): New type.
+	(push_lex_state, pop_lex_state): Use it.  Change from macros
+	PUSH_LEX_STATE and POP_LEX_STATE to static functions, and add
+	parameters to make them proper C functions.  All uses changed.
+	(lex): Simplify tests for \) and \|.  Avoid some string
+	duplication by using &"^..."[boolean].
+	(dfaalloc): Use xzalloc, not xcalloc with 1.
+
+2016-08-21  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: minor tweaks of initial buffer alloc
+	* src/grep.c (main): Allocate input buffer only when about
+	to do I/O.  Avoid int overflow on systems with 2 GiB pages.
+	Fix size_t overflow check.
+
+2016-08-20  Zev Weiss  <zev@bewilderbeest.net>
+
+	dfa: constify some function parameters
+	* src/dfa.c (char_context): Mark dfa parameter const.
+	(charclass_context): Likewise.
+
+	dfa: thread-safety: initialize mbrtowc_cache in dfa_init
+	* src/dfa.c (dfasyntax): Remove initialization of mbrtowc_cache.
+	(init_mbrtowc_cache): New function.
+	(dfa_init): Call it.
+	http://bugs.gnu.org/24259
+
+	dfa: thread-safety: eliminate static local variables
+	* src/dfa.c: Replace utf8 and unibyte_c static local variables with
+	static globals initialized by a new function dfa_init() which must be
+	called before any other dfa*() functions.
+	(dfa_using_utf8): Rename using_utf8() to dfa_using_utf8() for
+	consistency with other exported functions.
+	* src/dfa.h (dfa_using_utf8): Rename using_utf8() to dfa_using_utf8();
+	also add _GL_ATTRIBUTE_PURE.
+	(dfa_init): New function.
+	* src/grep.c (main), tests/dfa-match-aux.c (main): Call dfa_init().
+	* src/dfasearch.c (EGexecute): Replace using_utf8 with dfa_using_utf8.
+	* src/kwsearch.c (Fexecute): Likewise.
+	* src/pcresearch.c (Pcompile): Likewise.
+	http://bugs.gnu.org/24259
+
+	dfa: thread-safety: move regex syntax configuration into struct dfa
+	* src/dfa.c: move global variables holding regex syntax configuration
+	into a new struct (`struct regex_syntax') and add an instance of it to
+	struct dfa.  All references to the globals are replaced with
+	references to the dfa struct's new member.  As a side effect, a
+	`struct dfa' must be allocated with dfaalloc() and passed to
+	dfasyntax().
+	* src/dfa.h (dfasyntax): Add new struct dfa* parameter.
+	* src/dfasearch.c (GEAcompile): Allocate `dfa' earlier and pass it to
+	dfasyntax().
+	* tests/dfa-match-aux.c (main): Pass `dfa' to dfasyntax().
+	http://bugs.gnu.org/24259
+
+	dfa: thread-safety: move parser state into struct dfa
+	* src/dfa.c: move global variables holding parser state (`tok' and
+	`depth') into a new struct (`struct parser_state') and add an instance
+	of it to struct dfa.  All references to the globals are replaced by
+	references to the dfa struct's new member.
+	http://bugs.gnu.org/24259
+
+	dfa: thread-safety: move lexer state into struct dfa
+	* src/dfa.c: move global variables holding lexer state into a new
+	struct (`struct lexer_state') and add an instance of this struct to
+	struct dfa.  All references to the globals are replaced with
+	references to the dfa struct's new member.
+	http://bugs.gnu.org/24259
+
+2016-08-19  Zev Weiss  <zev@bewilderbeest.net>
+
+	dfa: thread-safety: remove dfa.c's "dfa" global
+	Remove the global dfa struct.  Instead, add a struct dfa pointer
+	parameter to each function that had been using the global.
+	* src/dfa.c (dfa): Remove file-scoped global.
+	(charclass_index): Remove now-unnecessary function.
+	(using_simple_locale): Add a dfa parameter and update all callers.
+	(FETCH_WC, parse_bracket_exp, lex, addtok_mb, addtok): Likewise.
+	(addtok_wc, add_utf8_anychar, atom, nsubtoks, copytoks): Likewise.
+	(closure, branch, regexp): Likewise.
+	(dfaparse): No longer set the global.
+	http://bugs.gnu.org/24260
+
+2016-08-18  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: tune list_files conversion to enum
+	* src/grep.c (grepdesc): Use a slightly more-efficient way to test
+	list_files.
+
+	grep: prefer bitwise to short-circuit when shorter
+	* src/grep.c (skip_devices, initialize_unibyte_mask, fillbuf, main)
+	* src/kwsearch.c (Fexecute): Prefer bitwise to short-circuit ops
+	when they are logically equivalent and the bitwise ops generate
+	shorter code on GCC 6.1 x86-64.
+	* src/grep.c (get_nondigit_option, parse_grep_colors):
+	Use c_isdigit instead of spelling it out with a short-circuit op.
+
+2016-08-17  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: use 64-bit when ulong is at least that wide
+	* src/dfa.c (charclass_word): Now unsigned long instead of unsigned.
+	(CHARCLASS_WORD_BITS): Now 64 on 64-bit platforms.
+	(CHARCLASS_PAIR, CHARCLASS_INIT): New macros.
+	(CHARCLASS_WORD_MASK): Now a static const, since it no longer
+	needs to be a macro.
+	(equal): Open-code rather than calling memcmp.
+	(add_utf8_anychar): Use CHARCLASS_INIT.
+
+	dfa: avoid uninitialized constants
+	Some compilers warn about 'static int const x;' on the grounds
+	that X should have an initializer.  Instead of worrying about
+	this, rewrite to avoid this sort of thing.
+	* src/dfa.c (emptyset): New function.
+	(parse_bracket_exp): Use it instead of 'equal' and a zero constant.
+	* src/dfasearch.c (struct patterns): Remove tag 'patterns'.
+	(patterns0): Remove zero constant.
+	(GEAcompile): Use memset instead of the zero constant.
+
+2016-08-17  Jim Meyering  <meyering@fb.com>
+
+	maint: avoid new "make syntax-check" failure
+	* src/dfa.c: Adjust comment not to go past column 80.
+
+	tests: pcre-jitstack: avoid false failure without base64 -d support
+	* tests/pcre-jitstack: Try harder to find a base64 decoder:
+	try 'base64 -d', 'base64 -D', 'openssl base64 -d' and perl's
+	MIME::Base64 decode_base64.  The old code would fail at least on
+	OS X, for which base64 expects -D or --decode.
+	Reported by Jack Howarth in http://bugs.gnu.org/24243.
+
+2016-08-16  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: minor refactoring and doc fixes
+	* NEWS: Improve description of recent change.
+	* src/dfa.c: Improve commentary.  Indent new code (and some
+	long-existing howlers) more in GNU style.
+	(dfa_state): Reorder members to make struct smaller on x86.
+	mb_trindex member is now state_num, not size_t, so that -1 is more
+	natural; all uses changed.
+	(struct dfa): Similarly for mb_trcount member.
+	(state_index): Compute values for new state components before
+	allocating the state, to make the code easier to understand.
+	(state_index, dfastate): Prefer A & ~B to other forms like (A & B)
+	!= A.
+	(dfastate, build_state, transit_state): In new code, prefer i++ to
+	++i in for-loop control.
+	(build_state, transit_state): In new code, prefer < to >.
+	(transit_state): Add to *PP in one assignment, rather than in a
+	loop.  Prefer !x to x == NULL.  Use xmalloc instead of xnmalloc,
+	since the size is a constant.  Do the size calculation as a signed
+	integer constant expression, so that the compiler diagnoses any
+	overflow.
+	(transit_state, free_mbdata): Tune by looping from -1 to N - 1,
+	rather than from 0 to N - 1 with a separate instance for -1.
+	(dfaexec_main): Rewrite to avoid side effects in if-part.
+	(free_mbdata): Simplify.
+
+	dfa: port to C90
+	* src/dfa.c (transit_state, dfa_supported, dfamust):
+	Don't use declarations after statements.
+	If I recall correctly, gawk still wants to port to C90.
+
+	dfa: fix context newline confusion
+	* src/dfa.c (transit_state): Fix "... & ~0" that was evidently
+	intended to be "... & ~1".  Do index calculation in a simpler way,
+	that uses just addition (Bug#21486).
+
+2016-08-16  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: improve leading "." with non-UTF8 multibyte
+	In non-UTF8 multibyte locales, matching the dot expression is very
+	slow, as the next state is calculated on demand.  This change caches
+	the result for the typical case (Bug#21486).
+
+	Compare the run times of this command before and after this change,
+	on a i5-4570 CPU @ 3.20GHz using rawhide (~fedora 22) and compiled
+	with gcc 5.1.1 20150618:
+	yes "$(printf 'a%38db\n' 0)" | head -1000000 >in
+	env LC_ALL=ja_JP.eucJP time -p \
+	src/grep .......................................... in
+	  Before: 19.10
+	  After :  0.55
+
+	* NEWS: Document this.
+	* src/dfa.c: (struct dfa_state): New members curr_dependent, mb_trindex.
+	(MAX_TRCOUNT): New constant.
+	(struct dfa): New members mb_trans, mb_trcount.
+	(state_index): Initialize new members of struct dfa_state and calculate
+	dependency on context of next character for positions for dot.
+	(dfastate): Calculate follows positions for dot if enabled.
+	(realloc_trans_if_necessary): Allocate transition tables.
+	(build_state): Use new constant and reset transition tables.
+	(transit_state): Use cache for transition from a state with the dot
+	expression.
+	(free_mbdata): Deallocate transition tables.
+
+2016-08-06  Jim Meyering  <meyering@fb.com>
+
+	tests: standardize on 10-second timeouts to avoid rare false failure
+	In a parallel test run, it is not unusual to exceed a timeout of
+	1-3 seconds.  Increase several from 3 or fewer to 10 seconds.
+	* tests/skip-device: Increase timeout from 2 to 10 seconds.
+	* tests/grep-dev-null-out: Likewise, but s/1/10/.
+	* tests/pcre-invalid-utf8-input: Likewise, but s/3/10/.
+	* tests/dfa-match: Likewise.
+	* tests/pcre-invalid-utf8-infloop: Likewise.
+	* tests/pcre-infloop: Likewise.
+	* tests/max-count-overread: Likewise.
+	* tests/invalid-multibyte-infloop: Likewise.
+	Prompted by http://bugs.gnu.org/24159.
+
+	tests/backref-multibyte-slow:: avoid false positive
+	* tests/backref-multibyte-slow: When redirecting the "fast" LC_ALL=C
+	run's output to /dev/null, we got an artificially low timing (of 0),
+	due to grep's own stdout-vs-/dev/null optimization.  With an initial
+	timing of 0 on that first run, the derived timeout for the UTF-8 run
+	(which redirects to a file) would be a mere 1 second.  The fix: also
+	redirect that first run's output to a file, not to /dev/null.
+
+2016-08-05  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: minor fix for whether dfa is "fast"
+	* src/dfa.c (dfaoptimize): When a UTF-8 optimization succeeds for
+	a DFA (it can use single-byte code paths), record that by setting
+	its ->fast flag.
+
+2016-07-25  Jim Meyering  <meyering@fb.com>
+
+	grep: print "filename:lineno:" in invalid-regex diagnostic
+	Determining the file name and line number is a little tricky because
+	of the way the regular expressions are all concatenated onto a newline-
+	separated list.  By the time grep would compile regular expressions,
+	the <filename,lineno> origin of each regexp was no longer available.
+	This patch adds a list of filename,first_lineno pairs, one per input
+	source, by which we can then map the ordinal regexp number to a
+	filename,lineno pair for the diagnostic.
+
+	* src/dfasearch.c (GEAcompile): When diagnosing an invalid regexp
+	specified via -f FILE, include the "FILENAME:LINENO: " prefix.
+	Also, when there are two or more lines with compilation failures,
+	diagnose all of them, rather than stopping after the first.
+	* src/grep.h (pattern_file_name): Declare it.
+	* src/grep.c: (struct FL_pair): Define type.
+	(fl_pair, n_fl_pair_slots, n_pattern_files, patfile_lineno):
+	Define globals.
+	(fl_add, pattern_file_name): Define functions.
+	(main): Call fl_add for each type of the following: -e argument,
+	-f argument, command-line-specified (without -e) regexp.
+	* tests/filename-lineno.pl: New file.
+	* tests/Makefile.am (TESTS): Add it.
+	* NEWS (Improvements): Mention this.
+	Initially reported by Gunnar Wolf in https://bugs.debian.org/525214
+	Forwarded to grep's bug list by Santiago Ruano Rincón as
+	http://debbugs.gnu.org/23965
+
+2016-07-24  Jim Meyering  <meyering@fb.com>
+
+	tests: add coreutils' perl-driven test framework
+	* configure.ac: Set the AM_CONDITIONAL variable, HAVE_PERL.
+	* tests/Coreutils.pm: New file.
+	* tests/CuSkip.pm: New file.
+	* tests/CuTmpdir.pm: New file.
+	* tests/no-perl: New file.
+	* tests/Makefile.am: Set up to use .pl tests:
+	(TEST_EXTENSIONS, TESTSUITE_PERL, TESTSUITE_PERL_OPTIONS): Define.
+	(SH_LOG_COMPILER, PL_LOG_COMPILER): Define.
+	(EXTRA_DIST): Add the four new file names.
+
+	doc: omit an excess word in HACKING
+
+2016-07-21  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: always match single line only with DFA superset
+	\n cannot occur inside a multibyte character.  So an input always
+	matches single line only with DFA superset.
+
+	* src/dfasearch.c (EGexecute): Simplify it with above.
+
+2016-07-15  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: fix whitespace problems
+	* src/dfa.c: Use GNU style for pointer decls.
+
+2016-07-15  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: modernize HACKING a bit
+	* HACKING: Remove some ancient history to simplify maintenance.
+
+2016-07-14  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: minor style changes for -F crash fix
+	* src/kwset.c (memoff2_kwset): Use ?: instead of if-else.
+
+2016-07-14  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: fix -F crash when alternating duplicates
+	grep -F crashes with a pattern like 0\n0.
+	This bug was introduced in 966f6586fbce3081ce6e5e2f9b55301b0ec3d2b4.
+
+	* src/kwset.c (memoff2_kwset): If two characters are the same,
+	use memchr instead of memchr2.
+	* tests/two-chars: New test.
+	* tests/Makefile.am (TESTS): Add it.
+
+2016-07-07  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: fix comments to match code better
+	* src/dfa.c: Fix comments.
+
+2016-07-06  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: don't treat null bytes specially
+	* src/dfa.c (transit_state): Do not treat null byte specially
+	when eolbyte == '\n'.
+
+2016-07-06  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: don't distingish letter in non-POSIX locales
+	For non-POSIX locales, dfa does not support word delimiter
+	support, so remove distinction between letters and non-letters.
+	* src/dfa.c (struct dfa): Remove members initstate_letter,
+	initstate_others.  All uses removed.  New member initstate_notbol.
+	(dfaanalyze, dfaexec_main): Replace old members with new member.
+	(wchar_context): Remove.  Update callers.
+
+2016-07-06  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: minor cleanups for non-POSIX simplification
+	* src/dfa.c (transit_state_singlebyte): Remove unnecessary 'const'
+	from arg; we usually don't bother with 'const' on locals.
+	(transit_state_singlebyte): Omit '!= NULL' in boolean context.
+	Use assert rather than abort.
+
+2016-07-06  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: simplify for non-POSIX locales
+	Simplify the dfa code, since it no longer supports ranges,
+	collating elements, and equivalent classes in non-POSIX locales.
+	* src/dfa.c (struct dfa): Remove mb_match_lens.
+	(enum status_transit_state, match_anychar)
+	(check_matching_with_multibyte_ops, transit_state_consume_1char):
+	(State_transition): Remove.
+	(transit_state_singlebyte): Accepts pointer-to-pointer position,
+	instead of pointer, and no longer accept pointer to next state.
+	Return next state instead of status_transit_state.  All callers
+	changed.
+	(transit_state_singlebyte, transit_state): Simplify.
+	(dfaexec_main): Now transit_state is called only when next character
+	matches with ANYCHAR.
+
+2016-06-14  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: propagate more changes from grep.texi
+	Problem reported by Björn Voigt in: http://bugs.gnu.org/23763#27
+	* doc/grep.in.1: Fix more inconsistencies with grep.texi.
+
+2016-06-13  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: remove obsolete MS-DOS mention
+	* doc/grep.in.1: Remove obsolete discussion of MS-DOS heuristics.
+	Problem reported by Björn Voigt in: http://bugs.gnu.org/23763
+
+2016-06-09  Zev Weiss  <zev@bewilderbeest.net>
+
+	grep: do pagesize initialization and buffer allocation earlier
+	* src/grep.c (reset, main): We're going to need pagesize and buffer
+	initialized anyway, so we might as well do so unconditionally early on
+	rather than checking on every call to reset().
+	http://bugs.gnu.org/23717
+
+	grep: remove unnecessary dirdesc variable.
+	* src/grep.c (grepdirent): Remove dirdesc variable and just use
+	fts_cwd_fd directly, since the fts_options test was guaranteed to
+	succeed (and fts_cwd_fd was already being used directly in fstatat()
+	anyway).  http://bugs.gnu.org/23716
+
+	grep: convert list_files to an enum
+	* src/grep.c: Make list_files a tristate enum instead of an int.
+	http://bugs.gnu.org/23715
+
+	grep: correct a stale comment and remove dead code
+	* src/grep.c (grepdesc): The `grep()' function no longer has
+	special-case negative return values, since it no longer handles
+	directories, so don't bother checking for them.
+	http://bugs.gnu.org/23714
+
+	maint: replace bitwise with logical OR
+	* src/grep.c (main): replace bitwise ORs with logical ORs where it
+	makes sense (when dealing with boolean conditions as opposed to
+	bitmasks).  http://bugs.gnu.org/23713
+
+	maint: mark a couple of static variables const
+	* src/dfa.c (parse_bracket_exp): mark zeroclass const.
+	* src/dfasearch.c: mark patterns0 const.
+	http://bugs.gnu.org/23712
+
+2016-06-03  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: fix similar bug in exit status test
+	* tests/grep-dir (status_range): New shell function.
+	Use it to fix bug where $? was not saved properly.
+
+2016-06-03  Zev Weiss  <zev@bewilderbeest.net>
+
+	tests: fix bug in exit status test
+	When checking $? against multiple values, save its value in another
+	variable and check that so as to avoid tests beyond the first seeing a
+	$? clobbered by earlier ones.
+
+	* tests/status: save $? in a temporary variable before testing it.
+
+2016-06-02  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: more simplification of dfaexec_main
+	* src/dfa.c (dfaexec_main): Failure at an acceptable position and demand
+	to build state is unlikely.  So go next loop without checking them after
+	a newline.  This commit induces no semantic change.
+
+2016-06-02  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: correct attribution
+	* build-aux/git-log-fix: Fix attribution of primary Aho-Corasick patch
+
+2016-06-02  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: simplify -F Aho-Corasick a bit
+	This removes some tuning that complicates the code without providing
+	performance benefits that I could measure (GCC 6.1, x86-64).
+	(acexec_trans): Do not hand-unroll.  Unduplicate the code for a
+	transition step.
+
+	* src/kwset.c (struct kwset.kwsexec, bmexec, acexec_trans, acexec)
+
+2016-06-02  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: minor cleanups for -F Aho-Corasick
+	* NEWS: Don't claim 7x, as the value seems to be system-dependent.
+	* src/kwset.c (struct kwset.kwsexec, bmexec, acexec_trans, acexec):
+	* src/kwset.c, src/kwset.h (kwsalloc, kwsexec):
+	Don't put 'const' into the declaration when that is irrelevant to
+	the API.  More generally, don't bother with 'const' when it's only
+	a local so it is reasonably obvious to a reader that it is 'const'
+	anyway.  It would be overkill to add 'const' to all locals that
+	never change.
+	* src/kwset.c (U): Avoid unnecessary parens.
+	(treefails, memoff2_kwset, bmexec_trans, bmexec, cwexec, acexec_trans):
+	Prefer SIZE_MAX to (size_t) -1.
+	(bmexec_trans, cwexec, acexec_trans):
+	Remove attributes for static functions that no longer seem needed.
+	(memoff2_kwset): Rename from memchr2_kwset, since it returns
+	an offset, not a pointer.  All uses changed.
+	(cwexec, acexec_trans) [lint]: Remove initialization that is no
+	longer needed; at least, GCC 6.1 x86-64 does not need it.
+	(acexec_trans): Clarify code by using nesting rather than 'continue'.
+
+2016-06-02  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: use memchr2 for two patterns of a character
+	* src/kwset.c (memchr2_kwset): Add a new function.  grep uses memchr2 to
+	search just two letters.
+	(cwexec, acexec_trans): Use it.
+
+	grep: -F multiword longest match not always needed
+	Searching multiple fixed words, grep immediately returns without longest
+	match if not needed.  Without this change, grep tries longest match for
+	multiple words even if not needed.
+	* src/kwset.c (kwsexec, acexec, cwexec, bmexec): Add a bool argument
+	for whether longest match is needed.  All callers changed.
+	* src/kwset.h (kwsexec): Update prototype.
+
+2016-06-02  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: use Aho-Corasick algorithm to search multiple fixed words
+	Searching multiple fixed words, grep used the Commentz-Walter
+	algorithm, but this was O(m*n) and was very slow in the worst case.
+	For example:
+
+	  - input: yes `printf %040d` | head -10000000
+	  - word1: x0000000000000000000
+	  - word2: x
+
+	This change instead uses the Aho-Corasick algorithm to search multiple
+	fixed words.  It uses a high-quality trie-building function that is
+	already defined for Commentz-Walter in kwset.c.
+
+	I see 7x speed-up even for a typical case on Fedora 21 with a 3.2GHz i5
+	by this change.  Using best-of-5 trials for the benchmark:
+
+	    find /usr/share/doc/ -type f |
+	    LC_ALL=C time -p xargs.sh src/grep -Ff /usr/share/dict/linux.words >/dev/null
+
+	The results were:
+
+	    real 11.37  user 11.03  sys 0.24  [without the change]
+	    real 1.49   user 1.31   sys 0.15  [with the change]
+
+	* src/kwset.c (struct kwset): Add a new member 'mode'.
+	(kwsalloc): Use it.
+	All callers are changed.
+	(kwsincr): Using Aho-Corasick algorithm, build tries in normal order.
+	(acexec_trans, acexec): Add a new function.
+	(kwsexec): Use it.
+	* src/kwset.h (kwsalloc): Update a prototype.
+	* NEWS (Improvements): Mention it.
+
+2016-05-13  Jim Meyering  <meyering@fb.com>
+
+	maint: do not let a LANGUAGE envvar setting perturb tests
+	E.g., running "LANGUAGE=eo make check" would provoke a failure
+	of the encoding-error test, on systems that mistakenly let that
+	envvar trump the setting of LC_ALL.
+	* tests/envvar-check: New file, copied from coreutils.
+	* tests/Makefile.am (EXTRA_DIST): Add it.
+	(TESTS_ENVIRONMENT): Source it.
+	Also select TMPDIR as we do for coreutils tests.
+	Reported by Benno Schulenberg in http://bugs.gnu.org/23527.
+
+2016-05-02  Jim Meyering  <meyering@fb.com>
+
+	maint: avoid NEWS syntax-check failure
+	* NEWS: Move the mention of the /dev/null speed-up from the
+	block for 2.25 into the current, in-preparation block.
+
+2016-05-01  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: prefer bool for boolean
+	* src/dfa.c (syntax_bits_set, dfasyntax, using_utf8, FETCH_WC)
+	(POP_LEX_STATE, State_transition):
+	* src/dfa.h (using_utf_8):
+	Use bool for boolean.
+
+2016-05-01  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: stop exporting internal functions
+	* src/dfa.c, src/dfa.h (dfaparse, dfaanalyze, dfastate, dfainit):
+	Now static.
+
+	dfa: prefer bool at DFA interfaces
+	* src/dfa.c (struct dfa, dfasyntax, dfaanalyze, dfaexec_main)
+	(dfaexec_mb, dfaexec_sb, dfaexec_noop, dfaexec, dfacomp):
+	* src/dfa.h (dfasyntax, dfacomp, dfaexec, dfaanalyze):
+	* src/dfasearch.c (EGexecute):
+	Use bool for boolean.
+
+2016-05-01  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: speed up checking for character boundary
+	This should help performance with gawk; not so much with grep.
+	Suggested by Norihiro Tanaka in: http://bugs.gnu.org/18777
+	* src/dfa.c (never_trail): New static var.
+	(dfasyntax): Initialize it.
+	(skip_remains_mb): Use it to speed up a common case in Gawk.
+
+	grep: /dev/null output speedup
+	This sped up 'seq 10000000000 | grep . >/dev/null' by a factor of
+	380,000 on my platform (Fedora 23, x86-64, AMD Phenom II X4 910e,
+	en_US.UTF-8 locale).
+	* NEWS: Document this.
+	* src/grep.c (grepbuf): exit_on_match no longer implies that -q
+	was specified, so when a match is found, exit with exit_failure if
+	an error was also found.
+	(grepdesc): Omit unnecessary S_ISREG and st_ino checks.
+	out_stat.st_ino is zero if stdout is not a regular file,
+	and this cannot possibly equal st->st_ino.
+	(main): Omit duplicate initialization of exit_failure.  Do not
+	bother with isatty unless -q is not used and stdout is a character
+	special file and --color=auto and TERM says colorization is
+	possible.  Most importantly, set exit_on_match if the output is
+	/dev/null.
+	* tests/grep-dev-null-out: New test.
+	* tests/Makefile.am (TESTS): Add it.
+	* tests/status: Do not require grep to actually read all the input
+	files when the output is /dev/null and a matching line has been
+	found.
+
+2016-04-21  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.25
+	* NEWS: Record release date.
+
+2016-04-19  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: remove dependency on btowc
+	MirOS BSD btowc is a macro that (when GCC is being used) hardcodes
+	btowc (0x80) == WEOF regardless of locale, which contradicts
+	future POSIX in the C locale.  Instead of bothering to develop a
+	Gnulib workaround for the btowc incompatibility, use mbrtowc,
+	which we are using elsewhere and fixing anyway, and are caching so
+	it is fast here.  Problem reported by Nelson H. F. Beebe via Jim
+	Meyering in: http://bugs.gnu.org/23269#14
+	* bootstrap.conf (gnulib_modules): Remove btowc.
+	* src/dfa.c (struct dfa): Remove mbrtowc_cache member, replacing with ...
+	(mbrtowc_cache): ... this new static var.  All uses changed.
+	(dfambcache): Remove; now done by setsyntax.  Call removed.
+	(is_valid_unibyte_character): Remove.
+	(IS_WORD_CONSTITUENT): Remove this macro, replacing it with ...
+	(unibyte_word_constituent): ... this new function.  It uses
+	mbrtowc_cache rather than btowc.
+	(dfasyntax): Initialize mbrtowc_cache before using it.
+
+2016-04-10  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: minor doc tweaks inspired by Debian
+	Problem reported by Santiago Ruano Rincón in: http://bugs.gnu.org/22911
+	* doc/grep.in.1:
+	* doc/grep.texi (Matching Control, grep Programs)
+	(Regular Expressions):
+	Document -e, -f, and PCRE more carefully.
+
+2016-04-10  Jim Meyering  <meyering@fb.com>
+
+	maint: remove unused mbtoupper function
+	* src/searchutils.c (mbtoupper): Remove now-unused function.
+	Also remove inclusion of <assert.h>, since this change removed
+	the final use of assert.
+	* src/search.h (mbtoupper): Remove declaration.
+
+2016-04-10  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: in C locale, all bytes are valid characters
+	This works around glibc bug 19932:
+	https://sourceware.org/bugzilla/show_bug.cgi?id=19932
+	The actual bug fix was the update to the current version of Gnulib.
+	grep problem reported by Björn Jacke in: http://bugs.gnu.org/23234
+	* NEWS: Mention this.
+	* doc/grep.texi (File and Directory Selection): Crossref to LC_*
+	section.  Suggest why -a or LC_ALL=C might be useful.
+	(Environment Variables): Mention 'locale -a'.
+	Say that LC_CTYPE also specifies encoding, and that every
+	byte is a valid character in the C or POSIX locale.
+	* tests/c-locale: New test.
+	* tests/Makefile.am (TESTS): Add it.
+
+	build: update gnulib submodule to latest
+
+2016-04-05  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Give another example of binary file processing
+	Problem reported by Shlomi Fish
+	* doc/grep.texi (File and Directory Selection):
+	Document that 'q$' might match 'q' followed by a NUL
+	if --binary-files=binary is in effect.
+
+2016-04-03  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: test egrep/fgrep help only if our grep
+	Problem reported by Christian Weisgerber in: http://bugs.gnu.org/23146
+	* tests/Makefile.am (TESTS_ENVIRONMENT):
+	Test egrep and fgrep only if they use our grep.
+
+2016-03-29  Jim Meyering  <meyering@fb.com>
+
+	tests: remove spurious test of egrep
+	* tests/reversed-range-endpoints: Do not test egrep here.
+	There is already a test of grep -E.
+	Prompted by http://bugs.gnu.org/23146
+
+2016-03-23  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: -Pz no longer misdiagnoses [^a]
+	Problem reported by Michael Jess.
+	* NEWS: Document this.
+	* src/pcresearch.c (Pcompile): Do not diagnose [^ when [ is unescaped.
+	* tests/pcre: Test for the bug.
+
+2016-03-22  Jim Meyering  <meyering@fb.com>
+
+	maint: move new 'Improvements' blurb into proper section
+	* NEWS (Improvements): Move this new section from within the block
+	for the already-released 2.24 into the proper "next-release" block.
+	Also, retain the 2-blank-line separator between blocks.
+
+2016-03-18  Jim Meyering  <meyering@fb.com>
+
+	maint: avoid spurious "binary file ... matches" in generated THANKS
+	* Makefile.am (THANKS): Don't apply grep to a stream containing
+	NUL bytes.  Sync this rule from the one in coreutils: it was missing
+	some improvements.
+	Reported by Bailes Magio in http://bugs.gnu.org/22899
+
+2016-03-18  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: -oz now outputs null bytes, not newlines
+	* NEWS: Document this.
+	* doc/grep.texi (Other Options): Clarify that -z affects output
+	as well as input data.
+	* src/grep.c (print_line_middle): Output eolbyte, not newline, if -o.
+	* tests/null-byte: Test -o too.
+	* tests/pcre-context: Adjust test to match new behavior.
+
+2016-03-17  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: use errno consistently in write diagnostics
+	Feature request and initial version reported by Assaf Gordon in:
+	http://bugs.gnu.org/23031
+	* NEWS: Document this.
+	* src/grep.c: Include <stdarg.h>.
+	(stdout_errno): New static var.
+	(write_error_seen): Remove; superseded by stdout_errno.
+	All uses changed.
+	(putchar_errno, fputs_errno, printf_errno, fwrite_errno)
+	(fflush_errno): New static functions.
+	(print_filename, print_sep, print_offset, print_line_head)
+	(print_line_middle, print_line_tail, prline, prtext, grep)
+	(grepdesc): Use them.
+	* tests/write-error-msg: New file.
+	* tests/Makefile.am (TESTS): Add it.
+
+2016-03-10  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.24
+	* NEWS: Record release date.
+
+2016-02-28  Jim Meyering  <meyering@fb.com>
+
+	maint: add dist-check.mk
+	This file augments "make distcheck" rules.
+	* dist-check.mk: New file, from coreutils via gzip.
+	* Makefile.am (EXTRA_DIST): Add it.
+	* cfg.mk: Include it.
+
+2016-02-21  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: -Pz is incompatible with ^ and $
+	Problem reported by Sergei Trofimovich in: http://bugs.gnu.org/22655
+	* NEWS: Document this.
+	* src/pcresearch.c (Pcompile): Warn with -Pz and anchors.
+	* tests/pcre: Test new behavior.
+
+2016-02-21  Jim Meyering  <meyering@fb.com>
+
+	tests: test cleanup
+	* tests/z-anchor-newline: Remove test artifact that would write
+	to /t/x.
+
+2016-02-20  Jim Meyering  <meyering@fb.com>
+
+	grep -z: avoid erroneous match with regexp anchor and \n in text
+	* src/dfasearch.c (EGexecute): Clear the newline_anchor bit when
+	eolbyte is not '\n'.
+	* tests/z-anchor-newline: New file.
+	* tests/Makefile.am (TESTS): Add it.
+	* NEWS (Bug fixes): Describe it.
+	Originally reported by Ulrich Mueller in
+	https://bugs.gentoo.org/show_bug.cgi?id=574662
+	Reported to us by Sergei Trofimovich as http://debbugs.gnu.org/22655
+
+	tests: convert "cmd && fail=1" to "returns_ 1 cmd || fail=1"
+	The latter is robust, while the former can silently ignore
+	failure due to signals.
+	* cfg.mk (sc_prohibit_and_fail_1): New rule, copied from coreutils.
+	* tests/long-pattern-perf: Perform the above substitution.
+	* tests/mb-non-UTF8-performance: Likewise.
+	* tests/help-version: Merge from coreutils.
+
+2016-02-09  Jim Meyering  <meyering@fb.com>
+
+	maint: add a check-very-expensive target
+	* Makefile.am (check-very-expensive): New convenience rule,
+	currently merely equivalent to check-expensive.
+
+2016-02-04  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.23
+	* NEWS: Record release date.
+
+2016-02-02  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest
+	Update for this "make distcheck"-fixing change:
+	> verify-tests: also remove stray test-verify.Tpo
+
+2016-02-01  Jim Meyering  <meyering@fb.com>
+
+	tests/null-byte: test another code path
+	* tests/null-byte: Also exercise the case in which there is
+	a match in the block along with the NUL byte.
+
+2016-01-31  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Omit excess "Binary file ... matches"
+	Problem reported in: http://bugs.gnu.org/22461
+	* src/grep.c (grep): Don't report "Binary file ... matches"
+	merely because the file contained both matches and binary data.
+	Insist that the binary data contained a match.
+	* tests/null-byte: Add a test for this.
+
+2016-01-28  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest
+
+2016-01-23  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest
+
+	maint: fix typo in NEWS: s/a/an/
+
+2016-01-15  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: -x now supersedes -w more consistently
+	* NEWS, doc/grep.texi (Matching Control): Mention this.
+	* src/dfasearch.c (EGexecute):
+	* src/pcresearch.c (Pcompile):
+	Don't get confused by -w if -x is also present.
+	* src/pcresearch.c (Pcompile): Remove misleading comment about
+	non-UTF-8 multibyte locales, as PCRE doesn't support them.
+	Calculate buffer sizes more carefully; the old method
+	allocated a buffer slightly too big, seemingly due to luck.
+	* tests/backref-word, tests/pcre: Add tests for this bug.
+
+	tests: omit update-copyright-tests
+	This test does not check how 'grep' itself operates, so it is
+	out of place for grep's 'make check'.  Problem reported by Sam Razavi in:
+	http://bugs.gnu.org/22376
+	* bootstrap.conf (avoided_gnulib_modules): Add update-copyright-tests.
+
+2016-01-11  Jim Meyering  <meyering@fb.com>
+
+	tests: do use "yes" but via an AWK replacement
+	Also, use sed Nq in place of head -N
+	* tests/init.cfg (yes): Define.
+	Thanks to Paul Eggert for this definition.
+	* tests/max-count-overread: Revert to using "yes".
+	* tests/mb-non-UTF8-performance: Likewise, and use
+	"sed Nq" in place of head -N.
+
+2016-01-11  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* tests/pcre-count: Don't assume the page size is 32kB.
+
+2016-01-08  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: port to other POSIXish platforms
+	I tested this on Solaris 10 and AIX 7.1.
+	* tests/max-count-overread:
+	* tests/mb-non-UTF8-performance:
+	Don't assume 'yes' exists, as 'yes' is not in POSIX.
+	* tests/mb-non-UTF8-performance:
+	Don't rely on 'head -1000', as that option syntax is not POSIX.
+	* tests/pcre-count: Don't rely on "printf '\x0'".
+	* tests/unibyte-binary: Don't assume \200 is an encoding error
+	in every unibyte locale.
+
+2016-01-08  Jim Meyering  <meyering@fb.com>
+
+	tests: fix encoding-error test failure to use of printf '\xHH'
+	* tests/encoding-error: Don't rely on printf having support for \xHH
+	hexadecimal.  That is not portable.  Use \OOO octal, instead.
+
+	maint: fix typo in NEWS: s/a/an/
+
+2016-01-07  Jim Meyering  <meyering@fb.com>
+
+	mb-non-UTF8-performance: avoid FP test failure on fast hardware
+	* tests/mb-non-UTF8-performance: Don't use a fixed size.
+	Otherwise, on a fast system, the fixed-size unibyte test
+	would complete in a nominal 0 ms, which might well be
+	smaller than 1/30 of the multibyte duration, provoking
+	a false positive test failure.  Instead, increase the
+	size of the input until we obtain a unibyte duration of
+	at least 10ms.
+
+2016-01-07  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: mention unibyte encoding fix
+	* NEWS: Document recent fix for encoding errors in unibyte locales.
+
+	grep: improve unibyte -P performance
+	This is a followon to the recent changes prompted by Bug#20526.
+	In <http://bugs.gnu.org/bug=20526#86> Norihiro Tanaka pointed out
+	that grep mistakenly assumed that unibyte locales cannot have
+	encoding errors.  Here, the mistake hurt performance significantly.
+	On Fedora 23 x86-64 in the C locale, this patch improved grep's
+	performance by a factor of 7 when run as "grep -P 'z.*a'" on the
+	output of "yes $(printf '\200\n') | head -n 1000000000".
+	* src/pcresearch.c (multibyte_locale) [HAVE_LIBPCRE]: New static var.
+	(Pcompile): Set it.
+	(Pexecute): Use it to avoid the need to call
+	buf_has_encoding_errors in unibyte locales.
+
+2016-01-06  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Improve on fix for Bug#22181
+	* src/pcresearch.c (Pexecute): Update subject when skipping past
+	easily-determined encoding errors, as this is faster than letting
+	pcre_exec skip them.  On my platform this improves performance
+	4.7x on a benchmark created via "yes $(printf '\200\200\200\200
+	\200\200\200\200\200\200\200\200\200\200\200\200\200\200\200\200x\n')
+	| head -n 1000000 >j; grep -oP y j" in a UTF-8 locale.  Rework
+	code that deals with PCRE_ERROR_BADUTF8 return, to avoid an
+	incorrect (albeit currently harmless) 'bol = false' assignment.
+
+	grep: restore -P optimization (followup fix)
+	* src/search.h (EGexecute, Fexecute, Pexecute):
+	Change decls to match new implementations.
+	I forgot to add this file to the previous commit.
+
+	grep: restore -P PCRE_NO_UTF8_CHECK optimization
+	On my platform in the en_US.utf8 locale, this makes 'grep -P "z.*a" k'
+	220x faster, where k is created by the shell command:
+	yes 'abcdefg hijklmn opqrstu vwxyz' | head -n 10000000 >k
+	* src/dfasearch.c (EGexecute):
+	* src/grep.c (execute_fp_t):
+	* src/kwsearch.c (Fexecute):
+	* src/pcresearch.c (Pexecute):
+	First arg is now char *, not char const *, since Pexecute now
+	temporarily modifies this argument.
+	* src/grep.c, src/grep.h (buf_has_encoding_errors): Now extern.
+	* src/pcresearch.c (Pexecute): Use it.  If the input is free of
+	encoding errors, use a multiline search and the PCRE_NO_UTF8_CHECK
+	option, as this is typically way faster.  This restores an
+	optimization that was removed with the recent changes for binary
+	file detection.
+
+2016-01-05  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Fix calculation of unibyte_mask
+	* src/grep.c (initialize_unibyte_mask): The old method worked for
+	UTF-8 and other typical encodings, but did not work for weird
+	encodings, e.g., one where all bytes other than 0x7f and 0x80 are
+	unibyte characters.
+
+2016-01-01  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fix bug with with invalid unibyte sequence
+	This was introduced by the recent binary-data-detection changes.
+	Problem reported by Norihiro Tanaka in: http://bugs.gnu.org/20526#86
+	* src/grep.c (HIBYTE, easy_encoding, init_easy_encoding): Remove,
+	replacing with ...
+	(uword_max, unibyte_mask, initialize_unibyte_mask): ... this new
+	constant, static var, and function.  All uses changed.  The
+	unibyte_mask var generalizes the old local var hibyte_mask, which
+	worked only for encodings where every byte with 0x80 turned off is
+	a single-byte character.
+	(buf_has_encoding_errors): Return false immediately if
+	unibyte_mask is zero, not whether the current encoding is unibyte.
+	The old test was incorrect in unibyte locales in which some bytes
+	were encoding errors.
+	* tests/pcre-z: Require UTF-8 locale, since the grep -z . test now
+	needs this.  Use printf \0 rather than tr.  Port the 'grep -z .'
+	test to platforms where the C locale says '\200' is an encoding
+	error.  Use cmp rather than compare, as the file is binary and
+	so non-GNU diff might not work.
+	* tests/unibyte-binary: New file.
+	* tests/Makefile.am (TESTS): Add it.
+
+2016-01-01  Jim Meyering  <meyering@fb.com>
+
+	maint: update copyright year, bootstrap, init.sh
+	Run "make update-copyright" and then...
+
+	* gnulib: Update to latest.
+	* tests/init.sh: Update from gnulib.
+	* bootstrap: Likewise.
+
+2015-12-31  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: clarify text vs binary match output
+	* NEWS:
+	* doc/grep.texi (File and Directory Selection):
+	Make it clearer that grep can now output matching text before
+	reporting a binary match.  Problem reported by Norihiro Tanaka in:
+	http://bugs.gnu.org/20526#83
+
+	doc: minor clarifications
+	* doc/grep.in.1, doc/grep.texi: Minor clarifications suggested by
+	Debian documentation patches.  Problem reported by Santiago Ruano
+	Rincón in: http://bugs.gnu.org/18651
+
+	grep: fix -l --line-buffer bug
+	Problem reported by Louis Sautier in: http://bugs.gnu.org/18750
+	* NEWS: Document this.
+	* src/grep.c (grep, grepdesc): If --line-buffered, flush
+	stdout after outputting newline (or null byte, if applicable).
+
+2015-12-30  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: remove duplicate init
+	* src/grep.c (print_line_middle): Remove duplicate initialization.
+
+	grep: report line-buffered write error right away
+	* src/grep.c (prline): When line buffered, if there is a write
+	error, report it immediately rather than waiting until the next
+	line of output.
+
+	grep: -c should keep counting after binary data
+	Problem and fix reported by Jaroslav Škarvada, and test case
+	reported by Norihiro Tanaka, in: http://bugs.gnu.org/22028
+	* NEWS: Document this.
+	* src/grep.c (grep): Don't stop counting merely because nulls seen.
+	* tests/pcre-count: New file.
+	* tests/Makefile.am (TESTS): Add it.
+
+	dfa: port to tinycc
+	* src/dfa.c (add_utf8_anychar): Put 'const' after type.
+	Problem reported by Aharon Robbins in:
+	http://bugs.gnu.org/22260
+
+	grep: be less picky about encoding errors
+	This fixes a longstanding problem introduced in grep 2.21,
+	which is overly picky about binary files.
+	* NEWS:
+	* doc/grep.texi (File and Directory Selection): Document this.
+	* src/grep.c (input_textbin, textbin_is_binary, buffer_textbin)
+	(file_textbin):
+	Remove.  All uses removed.
+	(encoding_error_output): New static var.
+	(buf_has_encoding_errors, buf_has_nulls, file_must_have_nulls):
+	New functions, which reuse bits
+	and pieces of the removed functions.
+	(lastout, print_line_head, print_line_middle, print_line_tail, prline)
+	(prpending, prtext, grepbuf):
+	Avoid use of const, now that we have
+	functions that require modifying a sentinel.
+	(print_line_head): New arg LEN.  All uses changed.
+	(print_line_head, print_line_tail):
+	Return indicator whether the output line was printed.
+	All uses changed.
+	(print_line_middle): Exit early on encoding error.
+	(grep): Use new method for determining whether file is binary.
+	* src/grep.h (enum textbin, TEXTBIN_BINARY, TEXTBIN_UNKNOWN)
+	(TEXTBIN_TEXT, input_textbin): Remove decls.  All uses removed.
+	* src/pcresearch.c (Pexecute): Remove multiline optimization,
+	since the main program no longer checks for encoding errors on input.
+	* tests/encoding-error: New file.
+	* tests/Makefile.am (TESTS): Add it.
+
+2015-12-29  Jim Meyering  <meyering@fb.com>
+
+	maint: correct (make sorted) order of test file names
+	* tests/Makefile.am (TESTS): Insert new test name in sorted order.
+
+2015-12-28  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: --exclude matches trailing parts of args
+	Problem reported by Vincent Lefevre in:
+	http://bugs.gnu.org/22144
+	* NEWS:
+	* doc/grep.texi (File and Directory Selection): Document this.
+	* src/grep.c (excluded_patterns, excluded_directory_patterns):
+	Now 2-element arrays, with one element for subfiles and another
+	for command-line args.  All uses changed.  This implements the change.
+	(exclude_options): New function.
+	* tests/include-exclude: Test the change.
+
+2015-12-18  Jim Meyering  <meyering@fb.com>
+
+	grep -oP: don't infloop when processing invalid UTF8 preceding a match
+	* src/pcresearch.c (Pexecute): When advancing SUBJECT past an
+	encoding error, don't blindly set P to that new value, since we
+	will soon compute SEARCH_OFFSET = P - SUBJECT, and mistakenly
+	making that difference too small would allow us to match some
+	previously-processed text, resulting in an infinite loop.
+	* NEWS (Bug fixes): Mention it.
+	* THANKS.in: Add Christian's name and email address.
+	* tests/pcre-invalid-utf8-infloop: New file.
+	* tests/Makefile.am (TESTS): Add it.
+	Reported by Christian Boltz in http://debbugs.gnu.org/22181
+	Introduced by commit, v2.21-37-g14f8e48.
+
+2015-11-04  Jim Meyering  <meyering@fb.com>
+
+	tests: mark performance-related tests as expensive
+	These performance-related tests are slightly failure prone due to
+	varying system load during the two runs.
+	Marking these tests as "expensive" makes it so they are no longer run
+	via "make check". You can still run them via make "check-expensive".
+	This makes them less likely to be run by regular users.
+	* tests/long-pattern-perf: Use expensive_.
+	* tests/mb-non-UTF8-performance: Likewise.
+	Reported by Jaroslav Skarvada in http://debbugs.gnu.org/21826
+	and by Andreas Schwab in http://debbugs.gnu.org/21812.
+
+2015-11-01  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.22
+	* NEWS: Record release date.
+
+	tests: pcre-jitstack: upon failure, retry with no stack size limit
+	* tests/pcre-jitstack: Don't let an example that provokes inordinate
+	stack space use cause a test failure.  Thanks to reports from and
+	analysis by Bruce Dubbs; see http://debbugs.gnu.org/21755
+
+2015-10-27  Jim Meyering  <meyering@fb.com>
+
+	maint: update THANKS.in
+	* THANKS.in: Add name+email of those who found and reported
+	the bug that made grep -E '^x|x$' match any "x".
+
+2015-10-25  Zev Weiss  <zev@bewilderbeest.net>
+
+	dfa: plug a memory leak in dfamust
+	* src/dfa.c (dfamust): Ensure MP is freed, by refraining
+	from returning early when, at "done:" *RESULT is NULL.
+
+2015-10-25  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest
+	* gnulib: Pull in one more portability fix:
+	  stdalign: port to Sun C 5.9
+
+2015-10-24  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest, for portability fixes
+	* gnulib: Pull in changes like these:
+	  fts: port to C11 alignof
+	  stdalign: work around pre-4.9 GCC x86 bug
+
+	maint: NEWS: correct/amend
+	* NEWS: Move the long-regexp-performance-improvement from
+	"Bug fixes" to "Improvements."  Say more and include an example.
+	The -Fw degradation was introduced in commit v2.18-125-g94555dd
+
+	tests: avoid spurious failure on OpenBSD 5.8
+	* tests/fedora: Don't rely on "diff - FILE" reading from stdin.
+	Reported privately by Nelson Beebe.
+
+2015-10-17  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest; also bootstrap and tests/init.sh
+	* bootstrap: Update from gnulib.
+	* tests/init.sh: Likewise.
+	* gnulib: Update submodule to latest.
+
+	build: avoid spurious bootstrap failure involving pkg.m4
+	Running ./bootstrap could fail mistakenly at the very end in
+	its attempt to obtain a copy of pkg.m4.  It would search only
+	$(aclocal --print-ac-dir) and some other directories, but not
+	those listed in $(aclocal --print-ac-dir)/dirlist.
+	* bootstrap.conf (bootstrap_post_import_hook): Also search the
+	directories named in $(aclocal --print-ac-dir)/dirlist when that
+	file exists with nonzero size.
+
+2015-10-16  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: add news item
+	* NEWS: Document grep -Fw speedup.
+
+	grep: simplify previous change
+	* src/grep.c (main): Simplify recently-changed grep -Fw test.
+
+2015-10-16  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: use grep matcher for grep -Fw when unibyte
+	In single byte locales with grep -Fw, prefer the grep matcher to the
+	kwset matcher, as the former uses KWset and a DFA, whereas the latter
+	calls kwsexec many times until it matches a word.
+	* src/grep.c (main): Change pattern for fgrep into grep for grep -Fw in
+	single byte locales.
+
+2015-10-16  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: use memchr/memrchar
+	* src/kwsearch.c (Fexecute): Prefer memchr and memrchr to doing it
+	by hand.
+
+2015-10-16  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: improve performance of grep -Fw
+	* src/kwsearch.c (Fexecute): grep -Fw examined whether the previous
+	character is a word character after matching from the head of the
+	buffer.  It is extremely slow.  Now, if grep found a potential match,
+	it looks for the previous newline, and examines from there.
+
+2015-10-13  Jim Meyering  <meyering@fb.com>
+
+	maint: use single quote rather than UTF-8 multi-byte version
+	* tests/backref-alt: Translate unnecessary non-ASCII in comment.
+
+2015-10-13  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: make the executable a bit smaller
+	* src/dfa.c (dfamust): Hoist MB_CUR_MAX calculation out of loops.
+
+2015-10-13  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: fix bug in alternate of sub-patterns that differ only in constraints
+	Fix a bug where a line incorrectly matches alternates of sub-patterns
+	that differ only in the constraints, e.g., the ERE '^a|a$'.
+	Reported by Greg Boyd in: http://debbugs.gnu.org/21670
+	* src/dfa.c (dfamust): For a pattern with constraints, check that it is
+	matched including the constraints, to judge whether it is exact.
+
+	dfa: fix off-by-one error
+	* src/dfa.c (dfamust): Fix off-by-one error in computing 'must' length,
+	which caused the 'must' to be too short.  See:
+	http://bugs.gnu.org/21670#28
+
+2015-10-12  Jim Meyering  <meyering@fb.com>
+
+	doc: NEWS: mention a bug fix
+	* NEWS (Bug fixes): Describe it.
+	This bug was introduced by commit v2.18-85-g2c94326
+	and fixed by commit v2.21-51-g256a4b4.
+
+2015-10-11  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: add test case for Bug#21670
+	* tests/options: Add test #4 to catch Bug#21670.
+	Also, do not overescape # in shell strings.
+
+2015-09-19  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Add test for pop_fail_stack bug
+	Problem reported by Hanno Böck in: http://bugs.gnu.org/21513
+	If you use --with-included-regex the bug fix is in gnulib, here:
+	http://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=5513b40999149090987a0341c018d05d3eea1272
+	If you use glibc, the bug fix has not been installed yet.
+	* tests/Makefile.am (XFAIL_TESTS): Add backref-alt if system matcher.
+	(TESTS): Add backref-alt.
+	* tests/backref-alt: New file.
+	* tests/triple-backref: Remove unused var.
+	Don't skip if tested with glibc, as Makefile.am now handles this.
+
+	build: update gnulib submodule to latest
+
+2015-08-19  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: avoid use of uninitialized variable
+	EGexecute would use "backref" uninitialized.
+	While that could have no bearing on correctness, it could
+	impact performance, via an unnecessary use of regexp.
+	* src/dfasearch.c (EGexecute): Initialize backref.
+	Reported as http://debbugs.gnu.org/21273
+	Introduced by commit v2.21-55-gea0ebaa.
+
+2015-08-12  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: remove fgrep code for case insensitive match
+	The fgrep matcher is no longer called in case insensitive matching,
+	so remove the code to support it.
+	* src/kwsearch.c (mb_case_map_apply): Remove function.
+	(Fexecute): Remove now-unused code.
+
+2015-08-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: optimize [x-x]
+	* src/dfa.c (parse_bracket_exp): Treat [x-x] as if it were [x].
+	This also pacifies GCC, which otherwise complains about wc2
+	being set but not used.
+
+2015-08-12  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: remove unused multibyte support
+	Now regex should be used for range, collating element, equivalent class
+	in non POSIX locales.  So remove code to support these features.
+	* dfa.c (struct mb_char_classes): Remove members ch_classes,
+	nch_classes, ranges, nranges, equivs, nequivs, coll_elems, ncoll_elems.
+	All uses removed.
+	(match_mb_charset): Remove function.
+
+2015-08-01  Jim Meyering  <meyering@fb.com>
+
+	tests: mb-non-UTF8-performance: use new function
+	* tests/mb-non-UTF8-performance: Rewrite to use
+	the user-time measuring function in init.cfg.
+
+	tests: long-pattern-perf: measure user time, not elapsed
+	Measuring user time makes this test less prone to false
+	positive failure, and also lets us use a tighter bound.
+	* tests/long-pattern-perf: Measure elapsed user time rather than
+	wall-clock time, to permit a tighter bound on the ratio of
+	N-to-10N timings.  Suggested by Giuseppe Ottaviano.
+	Also, use regexps built from mostly 5-digit numbers, so that the 10:1
+	ratio applies to lines of "seq" output as well as to total bytes.
+
+	tests: new function to measure elapsed user time
+	* tests/init.cfg (user_time_): New function.
+
+2015-07-25  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: remove word delimiter support for multibyte locales
+	DFA supports word delimiter expressions, but it does not behave
+	correctly for multibyte locales.  Even if it were to be fixed,
+	the DFA matcher's performance would be no better than that of regex.
+	Thus, this change removes DFA support for word delimiter expressions
+	in multibyte locales.
+
+	* src/dfa.c (dfa_supported): Return false also when a pattern uses any
+	word delimiter expression in a multibyte locale.
+
+2015-07-25  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: avoid execution for a pattern including an unsupported expression
+	If a pattern includes a construct unsupported by the DFA matcher,
+	the DFA search would fail in most cases.  Make dfaexec immediately
+	return for any such pattern.
+
+	* src/dfa.c (struct dfa_state) [has_backref, has_mbcset]: Remove members
+	and all uses.
+	(dfaexec_main): Remove 'backref' parameter.  Update callers.
+	(dfaexec_noop): New function.
+	(dfa_supported): New function.
+	(dfassbuild): Remove now-unused code.
+	(dfacomp): When a pattern uses a DFA-unsupported construct, do not
+	waste time performing any further analysis.
+
+2015-07-19  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: DEBUG: print detail of DFA states
+	When compiled with -DDEBUG, grep outputs tokens etc.
+	With this change, also print DFA states and transitions.
+	This change is very useful when debugging those.
+
+	* src/dfa.c (prtok) [DEBUG]: Change `%c' to `%02x' in printf format.
+	(state_index) [DEBUG]: Print detail of new state.
+	(dfastate) [DEBUG]: Print detail of DFA states.
+	Reported as http://debbugs.gnu.org/18707
+
+2015-07-18  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	tests: sjis-mb: accept two more locales
+	* tests/sjis-mb: Accept the ja_JP.SJIS and ja_JP.PCK locales
+	as well as ja_JP.SHIFT_JIS, so this test is less likely to
+	be skipped unnecessarily.  Reported as http://bugs.gnu.org/18983
+
+2015-07-18  Jim Meyering  <meyering@fb.com>
+
+	tests: add a test for the performance fix
+	* tests/long-pattern-perf: New file.
+	* tests/Makefile.am (TESTS): Add it.
+
+2015-07-18  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: speed up handling of long pattern
+	DFA tries to find a long sequence of characters that must appear
+	in any matching line.  However, when a pattern is long (length N),
+	it is very slow, because it makes O(N^2) strstr calls.
+	This change reduces that to O(N) by processing each sequence of
+	adjacent "regular" characters as a group.
+
+	Compare the run times of this command before and after this change:
+	(on a i7-4770S CPU @ 3.10GHz using rawhide (~fedora 22) and compiled
+	with gcc 6.0.0 20150627)
+	  : | env time -f %e grep -f <(seq -s '' 9999)
+	  Before: 0.85
+	   After: 0.02
+
+	* src/dfa.c (dfamust): Process each string of concatenated normal
+	characters as a unit.
+	* NEWS (Improvement): Mention it.
+	Prompted by a bug report and patch by Ivan Yanikov
+	in http://bugs.gnu.org/15191#5
+
+2015-07-17  Jim Meyering  <meyering@fb.com>
+
+	tests: fix mis-applied patch.
+	* tests/include-exclude: I applied "|sort" to the wrong creation
+	of "out", and didn't push the same patch that I'd tested.
+
+	tests: avoid FS-dependent false-positive failure
+	* tests/include-exclude: Sort file name list, so that this test
+	is not sensitive to the order in which those names are returned
+	via readdir. I noticed the failure on a Fedora 21 system using ext4.
+	Also fix a typo: s/framework_failure+/framework_failure_/
+
+2015-07-13  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fix bug with --exclude-dir and command line
+	Reported by Aron Griffis in: http://bugs.gnu.org/21027
+	* NEWS: Document this.
+	* src/grep.c (grepdirent): Don't check whether the file is skipped
+	when on the command line, as that's the caller's responsibility.
+	(main): Anchor the exclude patterns.
+	* tests/include-exclude: Adjust test case to match fixed behavior.
+	Add some more test cases.
+
+	tests: fix $? typo in null-byte
+	* tests/null-byte: Don't assume $? survives an invocation of 'test'.
+
+2015-07-05  Jim Meyering  <meyering@fb.com>
+
+	maint: dfa: used unsigned types where appropriate
+	* src/dfa.c (case_folded_counterparts): Return unsigned int, not int.
+	Change type of two locals to unsigned int, to reflect that their
+	values are never negative.
+	(parse_bracket_exp): Adjust type of result at each use, as well
+	as that of related index variables.
+
+2015-07-04  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: build struct dfamust on demand
+	If we won't use KWset, do not build a "struct dfamust".
+	Now it is built only when needed.
+	* src/dfa.c (struct dfa) [musts]: Remove member.
+	(dfacomp): Don't build dfamust here.
+	(dfamustfree): New function to free a struct dfamust.
+	(dfamust): Make it a global function, and make it return a pointer
+	to a malloc'd struct dfamust.
+	(dfamusts): Remove it.
+	* src/dfa.h (struct dfamust) [next]: Remove member.
+	In the implementation preceding this patch, there was
+	never more than one of these in a given "struct dfa".
+	(dfamustfree, dfamust): Add prototypes.
+	(dfamusts): Remove prototype.
+	(dfaalloc): Declare with _GL_ATTRIBUTE_MALLOC.
+	To make that symbol usable there, move the inclusion
+	of "xalloc.h" from dfa.c to this file, dfa.h.
+	* src/dfasearch.c (kwsmusts): Adapt to use the new interface.
+	Update the comments to reflect reality.
+	This addresses http://bugs.gnu.org/17715
+
+2015-07-04  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: use recent gnulib syntax bits
+	* src/grep.c (Gcompile, Ecompile): Use plain RE_SYNTAX_GREP
+	and RE_SYNTAX_EGREP, now that we assume a recent-enough gnulib.
+
+	maint: ignore gendocs_template_min
+	* doc/.gitignore: Add '/gendocs_template_min'.
+
+	build: update gnulib submodule to latest
+
+	dfa: '.' and '[^x]' now consistently match newline
+	* src/dfa.c (parse_bracket_exp, lex, add_utf8_anychar)
+	(match_anychar): RE_DOT_NEWLINE and RE_HAT_LISTS_NOT_NEWLINE
+	are about LF, not about eolbyte.  This patch does not affect
+	'grep', but may affect other users of dfa.c.
+
+	grep: -z '[^x]' now consistently matches newline
+	Problem reported by Norihiro Tanaka in: http://bugs.gnu.org/20974#19
+	* NEWS: Document this.
+	* src/grep.c (Gcompile, Ecompile): Clear RE_HAT_LISTS_NOT_NEWLINE.
+	* tests/utf8-bracket: Test this.
+
+2015-07-03  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: -z '.' now consistently matches newline
+	Problem reported by Balazs Kezes in: http://bugs.gnu.org/20974
+	* NEWS: Document this.
+	* tests/utf8-bracket: New file, to test for this bug.
+	* src/grep.c (Gcompile, Ecompile): Also specify RE_DOT_NEWLINE.
+	* tests/Makefile.am (TESTS): Add it.
+
+	grep: simplify print_line_middle slightly
+	* src/grep.c (print_line_middle): Simplify.
+
+	grep: don't mishandle left context in -P
+	http://bugs.gnu.org/20957
+	* src/pcresearch.c (jit_exec): New arg SEARCH_OFFSET.
+	Caller changed.
+	(Pexecute): Pass the left context to pcre_exec, so that PCRE
+	regular-expression matching can see it.
+	* tests/pcre-context: New file, to test for this bug.
+	* tests/Makefile.am (TESTS): Add it.
+
+2015-06-28  Jim Meyering  <meyering@fb.com>
+
+	tests/case-fold-backref: factor test
+
+2015-06-26  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: don't hang on command-line fifo if -D skip
+	* NEWS: Document this.
+	* src/grep.c (skip_devices):
+	New function, with code taken from grepdirent.
+	(grepdirent): Use it.  Avoid an unnecessary initialization.
+	(grepfile): If skipping devices, open files with O_NONBLOCK.
+	Throw in O_NOCTTY while we're at it.
+	(grepdesc): Skip devices here, too.  Not only does this fix the
+	bug, it fixes an unlikely race condition if some other process
+	renames a device between fstatat and openat.
+	* tests/skip-device: Add a test for this bug.
+
+	grep: minor tweaks
+	* src/grep.c (main): Change recently-added static vars to be
+	constants, which makes them sharable.  Prefer 'return' to 'exit'
+	when returning/exiting from 'main'.  Move decl closer to first use
+	and rename local from 'ok' (which was confusing) to 'status'.
+	Prefer named constant STDOUT_FILENO to unnamed constant 1.
+
+2015-06-26  Jim Meyering  <meyering@fb.com>
+
+	maint: unify three argv-processing calls
+	* src/grep.c (main): Unify three calls to grep_commandline_arg.
+
+	maint: alphabetize anonymous enum member names
+
+2015-05-30  Paul Eggert  <eggert@cs.ucla.edu>
+
+	test: tighten tests for bracket exprs
+	* tests/posix-bracket: Test '[a-a[.-.]--]'.
+	Also, test that failures are with status 1
+	(nonmatching data), not status 2 (invalid expressions).
+
+2015-04-26  Jim Meyering  <meyering@fb.com>
+
+	maint: update bootstrap from gnulib
+	* bootstrap: Update from gnulib.
+
+	maint: reword a diagnostic not to trigger leading capital check
+	* src/pcresearch.c: Reword diagnostic to avoid "make syntax-check"
+	failure.
+
+	maint: sort test names in tests/Makefile.am and add syntax-check rule
+	* cfg.mk (sc_sorted_tests): New rule.
+	* tests/Makefile.am (TESTS): Alphabetize.
+
+2015-04-25  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: make find_pred return NULL for an invalid predicate
+	This could never happen when invoked via grep, but could have triggered
+	a bug if dfa.c's find_pred function were invoked by some other program.
+	* src/dfa.c (find_pred): Return NULL for an invalid predicate.
+	* tests/invalid-char-class: New file to test for this.
+	* tests/Makefile.am (TESTS): Add that new file name to the list.
+	This addresses http://debbugs.gnu.org/18631
+
+2015-04-06  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: improve pkg-config doc and error handling
+	Error-handling improvement suggested by Mike Frysinger in:
+	http://bugs.gnu.org/16757#29
+	* NEWS: Document pkg-config changes.
+	* README-prereq: pkg-config is now a prereq when building from
+	repository.
+	* m4/pcre.m4 (gl_FUNC_PCRE): Report an error if pcre is explicitly
+	requested but not available.  Defer to user-supplied PCRE_CFLAGS
+	and PCRE_LIBS.
+
+	build: remove typo and don't bother with /usr/include/pcre
+	Problem reported by Holger Bruenjes.
+	* m4/pcre.m4: Remove test for /usr/include/libpng (a typo).
+	Come to think of it, don't bother worrying about
+	/usr/include/pcre, as hosts with that problem can use pkg-config
+	or configure with CFLAGS by hand.
+
+	build: use pkg-config (if available) to configure libpcre
+	Problem reported by Mike Frysinger in: http://bugs.gnu.org/16757
+	* bootstrap.conf (bootstrap_post_import_hook):
+	Copy pkg-config's pkg.m4.
+	* configure.ac: Invoke PKG_PROG_PKG_CONFIG.
+	* m4/pcre.m4 (gl_FUNC_PCRE): Rewrite to use pkg-config if
+	available, and to test that pcre_compile can be linked to.
+	* src/Makefile.am (AM_CFLAGS): Add PCRE_CFLAGS.
+	(grep_LDADD): Add PCRE_LIBS.
+	* src/pcresearch.c: Simply include <pcre.h> if HAVE_LIBPCRE,
+	since 'configure' arranges for the appropriate -I option now.
+
+2015-03-11  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: output "." file name in diagnostic
+	This is bug C as reported by David Grayson in:
+	http://bugs.gnu.org/16444#18
+	This bug occurs only in obscure circumstances, and I didn't see
+	how to write a reasonable test case for it.
+	* src/grep.c (filename_prefix_len): Remove, replacing with ...
+	(omit_dot_slash): New static var.  All uses of the former replaced
+	with uses of the latter.
+	(grepdirent): Don't add 2 if the filename is just ".".
+
+	egrep, fgrep: just use what's in PATH
+	* src/egrep.sh: Don't monkey with PATH; just use whatever 'grep'
+	is in the path.  This is simpler, and lets the user specify
+	default options with a script for only grep, with no need for
+	egrep and fgrep scripts.
+	Fixes: bug#19998
+
+	doc: give a script wrapper example
+	* doc/grep.texi (Environment Variables): Give an example of a
+	wrapper script, as an alternative to using GREP_OPTIONS.
+	Fixes: bug#19998
+
+	doc: clarify how -a matches
+	* doc/grep.in.1, doc/grep.texi (File and Directory Selection):
+	Give an example of how non-text bytes affect pattern matching in
+	binary files.
+	Fixes: bug#20080
+
+2015-02-23  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Cover the non-INSTALL case
+	* README: Mention what to do if there is no INSTALL file.
+	Fixes: bug#19928
+
+2015-02-11  Jim Meyering  <meyering@fb.com>
+
+	maint: use ASAN-poisoning more carefully
+	The ASAN-poisoning instituted by commit v2.21-14-g1555185 was
+	incomplete, since the poisoned tail of the read buffer could well
+	be the target of a legitimate follow-on read.  To accommodate that,
+	we must unpoison each such region just before beginning fillbuf's
+	read loop.
+	* src/grep.c [HAVE_ASAN] (asan_poison): Define.
+	(clear_asan_poison): Define.
+	(fillbuf): Clear before reading, since we are likely to read
+	into memory that was poisoned on the preceding iteration.
+	* tests/two-files: New file, to test for this.
+	* tests/Makefile.am (TESTS): Add it.
+
+2015-02-10  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Grow the JIT stack if it becomes exhausted
+	Problem reported by Oliver Freyermuth in: http://bugs.gnu.org/19833
+	* NEWS: Document the fix.
+	* tests/Makefile.am (TESTS): Add pcre-jitstack.
+	* tests/pcre-jitstack: New file.
+	* src/pcresearch.c (NSUB): Move decl earlier, since it's needed
+	earlier now.
+	(jit_stack_size) [PCRE_STUDY_JIT_COMPILE]: New static var.
+	(jit_exec): New function.
+	(Pcompile): Initialize jit_stack_size.
+	(Pexecute): Use new jit_exec function.  Report a useful diagnostic
+	if the error is PCRE_ERROR_JIT_STACKLIMIT.
+
+2015-02-01  Jim Meyering  <meyering@fb.com>
+
+	maint: reference CVE-2015-1345 from NEWS
+	* NEWS: Mention the CVE that was addressed by v2.21-13-g83a95bd,
+	"grep -F: fix a heap buffer (read) overrun".
+
+2015-01-18  Jim Meyering  <meyering@fb.com>
+
+	maint: convert "goto" to "continue" and remove now-spurious label
+	* src/kwset.c (bmexec_trans): Using "goto big_advance" here is
+	equivalent to using "continue".  Make that change and remove
+	the now-unused label.
+
+2015-01-10  Jim Meyering  <meyering@fb.com>
+
+	tests: add support for ASAN memory poisoning
+	This lets us reliably detect with ASAN some UMR bugs
+	that would otherwise be detectable only some of the time
+	with MSAN.  Use __asan_poison_memory_region to mark the unused
+	portion of a read buffer as inaccessible.  Then, with ASAN,
+	any attempt to access those bytes results in an ASAN abort.
+	* src/system.h: Include "ignore-value.h".
+	(__has_feature): Define.
+	(HAVE_ASAN): Define when address sanitizer is enabled.
+	[HAVE_ASAN]: Declare these two __asan_* symbols.
+	[!HAVE_ASAN] (__asan_poison_memory_region): Define stub.
+	[!HAVE_ASAN] (__asan_unpoison_memory_region): Likewise.
+	* src/grep.c: Use __asan_poison_memory_region.
+
+2015-01-09  Yuliy Pisetsky  <ypisetsky@fb.com>
+
+	grep -F: fix a heap buffer (read) overrun
+	grep's read buffer is often filled to its full size, except when
+	reading the final buffer of a file.  In that case, the number of
+	bytes read may be far less than the size of the buffer.  However, for
+	certain unusual pattern/text combinations, grep -F would mistakenly
+	examine bytes in that uninitialized region of memory when searching
+	for a match.  With carefully chosen inputs, one can cause grep -F to
+	read beyond the end of that buffer altogether.  This problem arose via
+	commit v2.18-90-g73893ff with the introduction of a more efficient
+	heuristic using what is now the memchr_kwset function. The use of
+	that function in bmexec_trans could leave TP much larger than EP,
+	and the subsequent call to bm_delta2_search would mistakenly access
+	beyond end of the main input read buffer.
+
+	* src/kwset.c (bmexec_trans): When TP reaches or exceeds EP,
+	do not call bm_delta2_search.
+	* tests/kwset-abuse: New file.
+	* tests/Makefile.am (TESTS): Add it.
+	* THANKS.in: Update.
+	* NEWS (Bug fixes): Mention it.
+
+	Prior to this patch, this command would trigger a UMR:
+
+	  printf %0360db 0 | valgrind src/grep -F $(printf %019dXb 0)
+
+	  Use of uninitialised value of size 8
+	     at 0x4142BE: bmexec_trans (kwset.c:657)
+	     by 0x4143CA: bmexec (kwset.c:678)
+	     by 0x414973: kwsexec (kwset.c:848)
+	     by 0x414DC4: Fexecute (kwsearch.c:128)
+	     by 0x404E2E: grepbuf (grep.c:1238)
+	     by 0x4054BF: grep (grep.c:1417)
+	     by 0x405CEB: grepdesc (grep.c:1645)
+	     by 0x405EC1: grep_command_line_arg (grep.c:1692)
+	     by 0x4077D4: main (grep.c:2570)
+
+	See the accompanying test for how to trigger the heap buffer overrun.
+
+	Thanks to Nima Aghdaii for testing and finding numerous
+	ways to break early iterations of this patch.
+
+2015-01-08  Jim Meyering  <meyering@fb.com>
+
+	grep: avoid false-positive UMR
+	For some inputs, valgrind would report an uninitialized
+	memory read error, but it was harmless.
+	* src/grep.c (fillbuf): Initialize those trailing bytes.
+
+2015-01-01  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest
+
+	maint: update copyright year ranges to include 2015
+	Run "make update-copyright".  Also, ...
+	* grep.texi: Update manually, converting each "--" to "-".
+
+2014-12-15  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: document binary-data heuristic better
+	Problem reported by Martin Hoch in: http://bugs.gnu.org/19388
+	* doc/grep.texi (File and Directory Selection):
+	Document what non-text bytes are.
+	(Usage): Fix cross reference.
+
+2014-12-12  Jim Meyering  <meyering@fb.com>
+
+	maint: fix a new "make syntax-check" failure
+	* tests/dfa-match-aux.c: s/can not/cannot/
+
+2014-12-12  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	build: avoid build failure with --enable-gcc-warnings and no PCRE
+	* src/pcresearch.c [HAVE_LIBPCRE] (empty_match): Guard the declaration
+	of this PCRE-only variable.
+
+2014-12-07  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: port fmbtest to CentOS 6 and earlier
+	* tests/fmbtest: Port to platforms where the 'sed' pattern
+	'[^0-9]' does not match every non-digit character.  Problem
+	reported by Norihiro Tanaka in: http://bugs.gnu.org/19293
+
+2014-12-06  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: simplify dfaexec
+	* src/dfa.c (dfaexec): Simplify by rearrangement of IF conditions.
+	This commit induces no semantic change, and reverts part of commit
+	v2.5.4-144-gbafa134.
+
+2014-12-06  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: avoid invalid match or infinite loop in unused matching mode
+	Neither grep nor gawk uses this DFA code in its matching mode,
+	since each always calls dfacomp with a nonzero final argument.
+	However, when used in that mode, it had bug:
+	After failing to match in matching mode, it should return NULL,
+	but instead would either report a false match or enter an
+	infinite loop.
+
+	* src/dfa.c (dfaexec_main): After failing to match in matching mode
+	return NULL, rather than transitioning to the next state.
+	* tests/dfa-match: Add a new test.
+	* tests/dfa-match-aux.c: Add a new program to exercise this
+	otherwise-unused part of dfa.c.
+	* tests/Makefile.am: Add a rule to build new test.
+	(check_PROGRAMS): Add dfa-match-aux.
+	(AM_CPPFLAGS): Add -I$(top_srcdir)/src.
+	(TESTS): Add dfa-match.
+	* cfg.mk (exclude_file_name_regexp--sc_bindtextdomain):
+	(exclude_file_name_regexp--sc_prohibit_atoi_atof):
+	Exempt the new test file from some syntax-check rules.
+
+2014-12-04  Santiago Ruano Rincón  <santiago@debian.org>
+
+	doc: document grep-2.11 change in behavior of -r, --recursive
+	* doc/grep.texi (--recursive, -r): Mention the new behavior
+	of recursively searching "." when there is no FILE argument.
+	* doc/grep.in.1: Likewise.
+	That change first appeared in grep-2.11, released on 2012-03-02.
+
+2014-11-24  Jim Meyering  <meyering@fb.com>
+
+	maint: correct for four Author: name misspellings
+	* .mailmap: Correct for misspelling in Norihiro Tanaka's last name
+	as listed in four commit Author: fields: s/Norihirio/Norihiro/
+
+2014-11-23  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.21
+	* NEWS: Record release date.
+
+2014-11-21  Jim Meyering  <meyering@fb.com>
+
+	tests: sjis-mb: remove now-obsolete and failing sub-tests
+	* tests/sjis-mb: Commit v2.18-123-geb3292b changed how grep
+	handles patterns with encoding errors.  These SJIS tests are
+	skipped so often that we didn't notice until now that there were
+	two tests of that changed behavior, and that on any system with
+	the ja_JP.SHIFT_JIS locale, they would always fail.  Remove those
+	two tests, since this functionality is well tested separately,
+	via tests/prefix-of-multibyte.
+
+2014-11-20  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep -F could erroneously fail to match in non-UTF8 multibyte locales
+	This fixes a bug that can strike only when using a non-UTF8 multibyte
+	locale like ja_JP.SHIFT_JIS.
+
+	Consider this example: it would mistakenly fail to match before
+	this patch:
+
+	  printf '\203AA\n'|LC_ALL=ja_JP.SHIFT_JIS src/grep -F A
+
+	When searching for a single byte that happens to be the latter
+	byte of a multibyte character, and the target byte also follows
+	that multibyte character, grep -F would advance an internal pointer
+	by one byte too many, thus missing the target byte.  A test case
+	for this bug is already included in tests/sjis-mb.
+
+	* src/kwsearch.c (Fexecute): Skip one byte less, after matched middle of a
+	multi-byte character.  Introduced by commit v2.18-119-gfb7d538.
+
+2014-11-17  Jim Meyering  <meyering@fb.com>
+
+	tests: big-match: disable OOM-provoking subtest
+	* tests/big-match: Our application of this regexp '^.*x\(\)\1'
+	to a file containing a single matching line of length 2GiB+2
+	would cause inordinate memory consumption (over 100GB) via
+	regexec.c, but no leak.  That would cause disruption on most
+	systems, so remove this subtest.  Reported by Assaf Gordon.
+
+2014-11-16  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: avoid undefined behavior
+	* src/dfa.c (dfassbuild): Don't call memcpy with a second
+	argument of NULL, even when the size (3rd argument) is 0.
+
+2014-11-14  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest
+
+2014-11-14  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep -F -x -o PAT would print an extra newline for each match
+	* src/kwsearch.c (Fexecute): Correctly compute the length of a match
+	by subtracting 2 (not 1) when match_lines is set.  With -x, we augment
+	the "line" by both prepending and appending an EOLBYTE to the search
+	pattern.  Here, we must correct for that.  However, to compensate,
+	when we are using -x (--line-regexp) and start_ptr is NULL, we have
+	to add 1 to the length so that we still print the trailing EOLBYTE.
+	Introduced by commit v2.18-85-g2c94326.
+	* tests/match-lines: Add a new test.
+	* tests/Makefile.am (TESTS): Add it.
+	* NEWS (Bug fixes): Mention it.
+
+2014-11-11  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: port to Darwin
+	The 'sed' command 's/.//' does not delete all bytes in the C locale.
+	Problem reported by Nelson H. F. Beebe.
+	* tests/fmbtest: Don't assume that sed treats bytes with the
+	top bit set as valid characters in the C locale, as this is not
+	true for Darwin.  Use the cs_CZ.UTF-8 locale instead, and
+	simplify the sed script.
+
+	tests: fix recently-introduced stray output
+	* tests/init.cfg (require_pcre_): Remove stray debugging output.
+
+	build: port to GCC 4.6.4 + glibc 2.5
+	On platforms this old, building with _FORTIFY_SOURCE equal to 2
+	results in duplicate definitions of standard library functions.
+	Problem reported by Nelson H. F. Beebe.
+	* configure.ac (_FORTIFY_SOURCE): Sort after GNULIB_PORTCHECK.
+	By default, do not enable this unless GNULIB_PORTCHECK is defined.
+	This better matches the original intent, which as I recall was to
+	enable these extra checks only with --enable-gcc-warnings.
+
+	tests: port to libpcre sans UTF-8 support
+	Problem reported by Nelson H. F. Beebe.
+	* tests/pcre-infloop, tests/pcre-invalid-utf8-input, tests/pcre-utf8:
+	Skip the test unless PCRE works in an en_US.UTF-8 locale.
+
+2014-11-09  Jim Meyering  <meyering@fb.com>
+
+	tests: do not fail when the zh_CN.UTF-8 locale is not installed
+	* tests/word-multibyte: This test would fail on a system with
+	no zh_CN.UTF-8 locale. Use it only if it is installed.
+
+	tests: avoid hex_printf_ portability problems
+	* tests/init.cfg (hex_printf_): Spell out a-f and A-F, for
+	non-C locales, ensure that the input to sed is newline-terminated,
+	and quote the final octal format string.
+	Suggestions from Paul Eggert.
+
+2014-11-08  Jim Meyering  <meyering@fb.com>
+
+	tests: avoid a multibyte tr portability problem
+	* tests/init.cfg (tr): New wrapper function.
+	See comments for details.  Reported by Norihiro Tanaka
+	in http://debbugs.gnu.org/18991
+
+	maint: remove spurious LC_ALL setting from one test
+	* tests/word-multibyte: Remove unnecessary setting of LC_ALL.
+
+	tests: fix typo in previous change
+	* tests/init.cfg (hex_printf_): Fix typo s/A-f/A-F/.
+	For the record, I introduced that error, not Norihiro.
+
+2014-11-08  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	tests: avoid awk+printf+\xHH portability trap
+	* tests/init.cfg (hex_printf_): Rewrite in terms of printf and sed.
+	Using awk's printf with \xHH in the format string was not portable
+	to the awk of Solaris 10, AIX 7 or HP-UX 11.23, as reported in
+	http://debbugs.gnu.org/18987.
+	* tests/word-multibyte: Use printf rather than hex_printf_,
+	and give the character we're printing a name: e_acute (rather
+	than A-grave), since that is used in other tests.
+	a trailing \n in the format string, adjust by removing it, and
+	instead invoking echo.
+	* tests/multibyte-white-space: Simply remove each trailing \n.
+	They were not needed.
+
+2014-11-07  Jim Meyering  <meyering@fb.com>
+
+	tests: avoid printf+\xHH portability trap
+	* tests/word-multibyte: Using the bourne shell's printf function
+	with strings like "\xHH\xHH" happens to work for most interactive
+	shells, but not for dash.  That is not portable.  Use our hex_printf_
+	awk wrapper instead. Without this change, this test would fail on
+	a Debian system for which /bin/sh is configured to be "dash".
+
+	maint: move helper function, hex_printf to init.cfg
+	* tests/init.cfg (hex_printf_): New function, from ...
+	* tests/multibyte-white-space: ... here.  Reflect the
+	s/hex_print/hex_printf_/ renaming.
+
+2014-11-02  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: port O_NOFOLLOW errno checking to NetBSD
+	Problem reported by Assaf Gordon in: http://bugs.gnu.org/18892
+	* NEWS: Document it.
+	* src/grep.c (open_symlink_nofollow_error):
+	New function, which does the right thing on NetBSD.
+	(grepfile): Use it.
+
+2014-10-31  Jim Meyering  <meyering@fb.com>
+
+	build: generate man pages even when existing targets are read-only
+	* doc/Makefile.am (grep.1): Use mv -f to move temporary to target,
+	in case the target is read-only.  Also, always make the generated
+	files read-only.
+	(egrep.1 fgrep.1): Likewise.
+	This avoids a build failure reported by Eric Blake in
+	http://lists.gnu.org/archive/html/bug-grep/2014-10/msg00112.html
+
+2014-10-30  Jim Meyering  <meyering@fb.com>
+
+	tests: avoid false-positive failure due to some zh_CN.* locales
+	On some systems, and for some zh_CN.* locales (e.g., OpenBSD5.5) the
+	E-acute pair of bytes do not qualify as a word-constituent character.
+	* tests/word-multibyte: Use zh_CN.UTF-8, rather than "zh_CN".
+	Reported by Assaf Gordon and Bruce Dubbs in
+	http://debbugs.gnu.org/18892
+
+2014-10-29  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest; bootstrap, too
+	* gnulib: Update to latest.
+	* bootstrap: Copy latest from gnulib.
+
+2014-10-28  Jim Meyering  <meyering@fb.com>
+
+	tests: make new test script executable
+	* tests/word-multibyte: Make this file executable.
+
+2014-10-28  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: make \w and \W work in multibyte locales
+	Reported by Jaroslav Skarvada in: http://bugs.gnu.org/18817
+	Now, \w and \W are supported in not only single byte locale but multibyte
+	locale.
+
+	* src/dfa.c (PUSH_LEX_STATE, POP_LEX_STATE): Move definitions "up",
+	so they are not within the function.
+	(lex): Make \w and \W work in a multibyte locale, the same way
+	we made \s and \S work.
+	* tests/word-multibyte: New test for this change.
+	* tests/Makefile.am: Add a rule to build new test.
+	* NEWS (Bug fixes): Mention it.
+
+2014-10-26  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: avoid false match in a non-UTF8 multibyte locale
+	This command should print nothing:
+
+	  printf '\263\244\263\244\n' \
+	    | LC_ALL=ja_JP.eucJP grep -E "$(printf '^x|\244\263')"
+
+	Before this patch, it would print its sole input line.
+	* src/dfa.c (struct dfa): Add new members: min_trcount,
+	initstate_letter, initstate_others.
+	(dfaanalyze): Build states with not only a newline context but others.
+	(build_state): Don't release initial states.
+	(skip_remains_mb): Add a parameter.
+	Add a comment describing all parameters.
+	(dfaexec_main): When there are multiple start states, we are about
+	to transition from one state to another and the current byte is not
+	the first byte of a multibyte character, first advance past the
+	current multibyte character.
+	* tests/euc-mb: Add a new test.
+	* NEWS (Bug fixes): Mention it.
+	This addresses http://debbugs.gnu.org/18685
+
+2014-10-25  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: work around older libpcre bugs when testing -P and UTF-8
+	* tests/pcre-invalid-utf8-input: Add require_timeout_ and
+	require_compiled_in_MB_support.  Put a timeout of 3 seconds on
+	grep, to avoid having this test case loop forever with older
+	versions of libpcre, such as those found on RHEL 6.5.
+	Reported by Jim Meyering in: http://bugs.gnu.org/18806#34
+
+2014-10-24  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	tests: add test for grep -P fix
+	* tests/pcre-o: New test for this change.
+	* tests/Makefile.am (TESTS): Add it.
+
+2014-10-24  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fix grep -P crash
+	Reported by Shlomi Fish in: http://bugs.gnu.org/18806
+	Commit 9fa500407137f49f6edc3c6b4ee6c7096f0190c5 (2014-09-16) is a
+	hack that I put in to speed up 'grep -P'.  Unfortunately, not only
+	is it violation of modularity, it's also a bug magnet, as we have
+	found out with Bug#18738 and Bug#18806.  Remove the optimization
+	instead of applying more bandaids.  Perhaps we can think of a
+	better way of doing the optimization, or perhaps we can just live
+	with a slower grep -P (as -P is inherently slower anyway...).
+	* src/grep.c, src/grep.h (validated_boundary):
+	Remove.  All uses removed.
+	* src/pcresearch.c (Pexecute): Do not worry about validated_boundary.
+
+2014-10-19  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: remove two erroneous clauses from a now-unused function
+	RE_DOT_NEWLINE and RE_DOT_NOT_NULL apply only to a dot that
+	matches any character.  Do not consider them when matching
+	with a bracket expression.
+
+	* src/dfa.c (match_mb_charset): Remove tests for RE_DOT_NEWLINE
+	and RE_DOT_NOT_NULL.
+
+2014-10-19  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: process all MBCSET constructs via glibc's matcher
+	The DFA matcher does not support collating symbols or equivalence
+	classes, so ensure that any MBCSET reference is handled by the glibc
+	matcher.  dfa.c already handled this in one case, but not the other,
+	so that a command like "printf '\0' |src/grep -aE '^\s?$'" would
+	mistakenly end up using dfa.c's match_mb_charset function rather
+	than glibc's matcher.
+
+	* src/dfa.c (dfaexec_main): Move that code into the
+	State_transition macro.  This renders the match_mb_charset
+	unused by grep.
+	* tests/multibyte-white-space: Add a test to exercise the
+	just-rendered-inaccessible code path.
+
+2014-10-15  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: initialize validation_boundary properly before use
+	* src/grep.c (main): Initialize validation_boundary before pre-searching
+	for an empty line.
+
+2014-10-15  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fix off-by-one bug in -P optimization
+	Reported by Norihiro Tanaka in: http://bugs.gnu.org/18738
+	* src/pcresearch.c (Pexecute): Fix off-by-one bug with
+	validation_boundary.
+	* tests/init.cfg (envvar_check_fail): Catch off-by-one bug.
+
+2014-10-08  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: fix a theoretical bug
+	* src/dfa.c (dfaexec_main): After searching for a match from
+	the initial state, set the previous state, S1, to 0.
+	So far, we have found no case in which this fix makes a difference.
+	See http://debbugs.gnu.org/18645
+
+2014-10-07  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: modernize and simplify man page
+	* doc/grep.in.1 (Tx, Id): Remove.  All uses removed.
+	(MTO, URL): New macros, used for email and URL.
+	Use them when appropriate.
+	In main text, omit chatty discussions of other implementations;
+	the full manual suffices for this sort of thing.
+
+	doc: clarify exit status
+	Reported by Santiago Ruano Rincón in: http://bugs.gnu.org/18651
+	* doc/grep.in.1 (EXIT STATUS):
+	* doc/grep.texi (Exit Status): Clarify.
+
+2014-10-07  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: test for just-fixed bug
+	* tests/mb-dot-newline: New file.
+	* tests/Makefile.am (TESTS): Add it.
+	* NEWS (Bug fixes): Mention it.
+	Bisection suggests that the bug was introduced by
+	commit v2.18-123-geb3292b.  Also see
+	http://debbugs.gnu.org/cgi/bugreport.cgi?msg=17;bug=18580
+
+2014-10-05  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: factor out a new nontrivial block of duplicated code
+	* src/dfa.c (State_transition): New macro.
+	(dfaexec_main): Use it twice.
+
+	dfa: check end of input buffer after transition in non-UTF8 multibyte locale
+	* src/dfa.c (dfaexec_main): Check for end of input buffer after each
+	transition in a non-UTF8 multibyte locale.
+	* tests/mb-non-UTF8-overrun: New test.
+	* tests/Makefile.am (TESTS): Add it.
+	* src/grep.c (main): With this fix, we no longer need the fourth
+	byte of "eolbytes".
+
+2014-10-04  Jim Meyering  <meyering@fb.com>
+
+	grep: avoid stack buffer read-underrun and overrun
+	Testing binaries built with -fsanitize=address caused aborts due
+	to stack underrun and overrun.
+	* src/grep.c (main): Allocate a larger buffer for eolbytes:
+	one byte before the beginning and one more after the end.
+	For details, see http://debbugs.gnu.org/18580#44.
+
+2014-10-04  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: fix subscript error when testing whether empty lines match
+	src/grep.c (grep): When testing whether an empty line matches,
+	make the input buffer one byte longer, as dfaexec uses that
+	for a sentinel.
+
+2014-09-27  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: minor tweaks, mostly to remove __attribute__ ((noinline))
+	That attribute isn't portable, and I found a way to get similar
+	performance with standard C features.
+	* NEWS: Document the recently-installed performance improvement.
+	* src/dfa.c (struct dfa): New member dfaexec.
+	(dfaexec_main): Remove unnecessary 'const'.
+	(dfaexec_mb, dfaexec_sb): Remove __attribute__ ((noinline));
+	no longer needed.
+	(dfaexec): Use new dfaexec member.
+	(dfainit, dfaoptimize, dfassbuild): Initialize it.
+
+2014-09-27  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: separate dfaexec function to help optimization by compiler
+	* src/dfa.c (dfaexec_main): Rename from dfaexec, add inline attribute.
+	(dfaexec_mb): New function.  Run it when d->multibyte is true.   For this
+	function inlination must be avoided.
+	(dfaexec_sb): New function.  Run it when d->multibyte is false.  For this
+	function inlination must be avoided.
+	(dfaexec): Call dfaexec_mb or dfaexec_sb accoding to d->multibyte.
+
+2014-09-27  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: speed-up at initial state
+	DFA state is always 0 until have found potential match.  So we improve
+	matching there by continuing to use the transition table.
+
+	* src/dfa.c (skip_remains_mb): New function.
+	(dfaexec): Speed-up at initial state.
+
+2014-09-27  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: generalize the -Wcast-align fix
+	* src/grep.c (CAST_ALIGNED): New macro.
+	(skip_easy_bytes): Use it.
+
+2014-09-27  Jim Meyering  <meyering@fb.com>
+
+	maint: suppress a false-positive -Wcast-align warning
+	Building with --enable-gcc-warnings and gcc-4.9.1 would provoke this:
+	  grep.c:499:12: error: cast from 'const char *' to 'const uword *'\
+	      (aka 'const unsigned long *') increases required alignment from\
+	      1 to 8 [-Werror,-Wcast-align]
+	    for (s = (uword const *) p; ! (*s & hibyte_mask); s++)
+		     ^~~~~~~~~~~~~~~~~
+	* src/grep.c (skip_easy_bytes): Use a pragma to suppress
+	gcc's false-positive cast-alignment warning.
+
+2014-09-26  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: don't check extensively for invalid prefix bytes unless -P
+	Problem reported by Jim Meyering in: http://bugs.gnu.org/18454#56
+	* src/grep.c (grep): After the first buffer is checked, leave the
+	file-type checker in TEXTBIN_UNKNOWN state only when -P is used.
+	Only the -P matcher has performance problems with checking binary
+	data that make it worthwhile to check every prefix input byte so
+	the -P matcher's TEXTBIN_UNKNOWN optimizations can come into play.
+	Other matchers can simply check the data directly, and using
+	TEXTBIN_UNKNOWN with them slows 'grep' down for no benefit.
+
+	grep: scan for valid multibyte strings more quickly
+	Scan valid multibyte strings more quickly in the common case of
+	encodings that are upward compatible with ASCII, such as UTF-8.
+	You'd think there'd be a fast standard way to do this nowadays,
+	but nooooo....
+	Problem reported by Jim Meyering in: http://bugs.gnu.org/18454#56
+	* src/grep.c (HIBYTE): New constant.
+	(easy_encoding): New static var.
+	(init_easy_encoding, skip_easy_bytes): New functions.
+	(uword): New type.
+	(buffer_textbin): Skip easy bytes quickly.
+	Don't bother with mb_clen here, since skip_easy_bytes typically
+	captures the easy cases; just use mbrlen directly.
+	(buffer_textbin, file_textbin): First arg is no longer a const
+	pointer, since the byte past the end is now an overwritten sentinel.
+	(fillbuf): Make room for a uword after the buffer, for skip_easy_bytes.
+	(main): Call init_easy_encoding.
+
+2014-09-17  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: speed up processing of holes before EOF on Solaris
+	* src/grep.c (fillbuf): If SEEK_DATA fails with errno == ENXIO,
+	skip over the hole at EOF.
+
+	grep: port to platforms lacking SEEK_DATA
+	Reported by Norihiro Tanaka in: http://bugs.gnu.org/18454#38
+	* src/grep.c (SEEK_DATA): Default to SEEK_SET if not defined.
+	(SEEK_HOLE): Move to top level, and default it to SEEK_SET.
+	(file_textbin): Adjust to new default.
+	(fillbuf): Don't bother with SEEK_DATA if it defaults to SEEK_SET.
+
+	grep: skip past holes efficiently
+	Take advantage of the relaxed rules for treating non-text bytes in
+	binary data, by efficiently skipping past holes on platforms
+	supporting lseek's SEEK_DATA flag.
+	On one test on a circa-2008 Sun Fire V40z running Solaris 11.2,
+	'grep x' took 0.009 real-time seconds to scan a holey file of size
+	9,223,372,036,854,775,802 bytes, for a nominal scan rate of 1 ZB/s.
+	grep 2.20's scan rate on this platform was 843 MB/s, so this is a
+	speedup by a factor of 1.2 trillion.  The speedup factor is not
+	as great on GNU/Linux hosts, due to what appear to be SEEK_DATA
+	inefficiencies, but presumably this will be cleared up in time.
+	* NEWS: Document this.
+	* src/grep.c, src/grep.h (eolbyte): Now char, not unsigned char.
+	This is for compatibility with the rest of the code.
+	The old (performance?) reasons for 'unsigned char' are now moot.
+	* src/grep.c (skip_nuls, skip_empty_lines, seek_data_failed):
+	New static vars.
+	(totalnl): Move up, since it's about input, not output, and
+	fillbuf now uses it.
+	(add_count): Move up, since fillbuf now uses it.
+	(all_zeros): New function.
+	(fillbuf): Use SEEK_DATA to skip past holes efficiently,
+	on systems that support this.
+	(grep, main): Set the new static vars.
+
+	grep: improve -P performance in typical cases
+	* src/grep.c, src/grep.h (enum textbin): Move to grep.h.
+	(input_textbin, validated_boundary): New vars.
+	* src/grep.c (grepbuf, grep): Initialize them.
+	* src/pcresearch.c (Pexecute): Do a multiline search
+	when the input is known to be free of encoding errors.
+	Quickly discard bytes that are obviously encoding errors.
+	Quickly match empty strings.
+
+	grep: minor -P speedup with jit_stack
+	* src/pcresearch.c (jit_stack): No longer static.
+
+	grep: non-text bytes in binary data may be treated as line ends
+	* NEWS, doc/grep.texi (File and Directory Selection):
+	Document this change.
+	* src/grep.c (zap_nuls): New function.
+	(grep): Use it.
+	* tests/null-byte: Relax to allow new behavior.
+
+	grep: -z no longer considers '\200' to be binary data
+	This avoids a problem when using grep -z in a Windows-1252 locale.
+	Plus, it lets 'grep -z' run a bit faster.
+	* NEWS: Document this.
+	* src/grep.c (buffer_textbin): Don't look for '\200' if -z.
+	* tests/pcre-z: Test for new behavior.
+
+	grep: refactor binary-vs-unknown-vs-text flags for clarity
+	* src/grep.c (enum textbin): New enum.
+	(textbin_is_binary): New function.
+	(buffer_textbin, file_textbin, grep): Use them, for clarity.
+
+2014-09-16  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fix -P speedup bug with empty match
+	* src/pcresearch.c (NSUB): New top-level constant, replacing
+	'nsub' within Pexecute.
+	(Pcompile, Pexecute): Use it.
+	(Pexecute): Don't assume sub[1] is zero after a PCRE_ERROR_BADUTF8
+	match failure.
+	* tests/pcre-invalid-utf8-input: Test for this bug.
+
+	grep: port -P speedup to hosts lacking PCRE_STUDY_JIT_COMPILE
+	* src/pcresearch.c (Pcompile): Do not assume that
+	PCRE_STUDY_JIT_COMPILE is defined.
+	(empty_match): Define on all platforms.
+
+	grep: use mbclen cache in one more place
+	* src/grep.c (fgrep_to_grep_pattern): Use mb_clen here, too.
+
+	grep: avoid false alarms for mb_clen and to_uchar
+	* cfg.mk (_gl_TS_unmarked_extern_functions): New var,
+	to bypass the tight_scope false alarms on mb_clen and to_uchar.
+
+	grep: use mbclen cache more effectively
+	* src/grep.c (buffer_textbin, contains_encoding_error):
+	Use mb_clen for speed.
+	(buffer_textbin): Bypass mb_clen in unibyte locales.
+	(main): Always initialize the cache, since it's sometimes used in
+	unibyte locales now.  Initialize it before contains_encoding_error
+	might be called.
+	* src/search.h (SEARCH_INLINE): New macro.
+	(mbclen_cache): Now extern decl.
+	(mb_clen): New inline function.
+	* src/searchutils.c (SEARCH_INLINE, SYSTEM_INLINE): Define.
+	(mbclen_cache): Now extern.
+	(build_mbclen_cache): Put 1 into the cache when mbrlen returns 0.
+	(mb_goback): Use mb_len for speed, and rely on it returning nonzero.
+	* src/system.h (SYSTEM_INLINE): New macro.
+	(to_uchar): Use it.
+
+	grep: improve performance for older glibc
+	glibc has a bug where mbrlen and mbrtowc mishandle length-0 inputs.
+	Working around it in gnulib slows grep down, so disable the tests for it
+	and make sure grep works even if the bug is present.
+	* bootstrap.conf (avoided_gnulib_modules): Add mbrtowc-tests.
+	* configure.ac (gl_cv_func_mbrtowc_empty_input): Assume yes.
+	* src/searchutils.c (mb_next_wc): Don't invoke mbrtowc on empty input.
+
+	grep: treat a file as binary if its prefix contains encoding errors
+	* NEWS:
+	* doc/grep.texi (File and Directory Selection):
+	Document this.
+	* src/grep.c (buffer_encoding, buffer_textbin): New functions.
+	(file_textbin): Rename from file_is_binary.  Now returns 3-way value.
+	All callers changed.
+	(file_textbin, grep): Check the input more carefully for text vs
+	binary data.
+	(contains_encoding_error): Remove; use replaced by buffer_encoding.
+	* tests/backref-multibyte-slow:
+	* tests/high-bit-range:
+	* tests/invalid-multibyte-infloop:
+	Use -a, since the input is now considered to be binary.
+	* tests/invalid-multibyte-infloop: Add a check for new behavior.
+
+	grep: use bool for boolean in grep.c
+	* src/grep.c (show_version, suppress_errors, only_matching)
+	(align_tabs, match_icase, match_words, match_lines, errseen)
+	(write_error_seen, is_device_mode, usable_st_size)
+	(file_is_binary, skipped_file, reset, fillbuf, out_quiet)
+	(out_line, out_byte, count_matches, no_filenames, line_buffered)
+	(done_on_match, exit_on_match, print_line_head, prline, grep)
+	(grepdirent, grepfile, grepdesc, grep_command_line_arg)
+	(get_nondigit_option, main): Use bool for boolean.
+	(print_line_head, prline): Use char for byte.
+	* src/grep.h: Include <stdbool.h>, and adjust decls to match
+	changes in grep.c.
+
+	grep: speed up -P on files containing many multibyte errors
+	* src/pcresearch.c (empty_match): New var.
+	(Pcompile): Set it.
+	(Pexecute): Use it.
+
+	grep: remove/refactor unnecessary code about line splitting
+	* src/grep.c (do_execute): Remove.  Caller now uses 'execute'.
+	* src/pcresearch.c (Pexecute): Improve comment about this.
+
+2014-09-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: diagnose -P in non-UTF-8 multibyte locale
+	* src/pcresearch.c (Pcompile):
+	libpcre supports only unibyte and UTF-8 locales,
+	so report an error and exit if used in other locales.
+	* NEWS: Mention this.
+	* tests/euc-mb: Test this.
+
+2014-09-12  Jim Meyering  <meyering@fb.com>
+
+	doc: move NEWS note about GREP_OPTIONS into proper section
+	* NEWS (Changes in behavior): Move the note about GREP_OPTIONS
+	from the 2.20 section into the section for the upcoming release.
+
+2014-09-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: make GREP_OPTIONS obsolescent
+	* NEWS:
+	* doc/grep.in.1 (ENVIRONMENT_VARIABLES):
+	* doc/grep.texi (Environment Variables):
+	Document that GREP_OPTIONS is obsolescent now.
+	* src/grep.c (main): Warn if GREP_OPTIONS is used.
+	* tests/r-dot, tests/skip-device: Don't use GREP_OPTIONS.
+
+2014-09-11  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: bug tracker has moved to debbugs.gnu.org
+	* README (KNOWN BUGS):
+	* doc/grep.in.1:
+	* doc/grep.texi (Reporting Bugs): Document this.
+
+	grep: fix false matches with -P '...$' and invalid UTF-8
+	* tests/pcre-invalid-utf8-input: Add a test for that.
+
+	grep: fix false matches with -P '...$' and invalid UTF-8
+	* src/pcresearch.c (Pexecute): Use PCRE_NOTEOL when matching
+	initial substrings of a line.
+
+2014-09-10  Jim Meyering  <meyering@fb.com>
+
+	tests: add expect-to-fail test for a glibc regexp bug
+	* tests/triple-backref: New file.
+	* tests/Makefile.am (TESTS): Add it.
+	(XFAIL_TESTS): List it as a known, always-failing test.
+	Based on the bug report from Paul Eggert:
+	https://sourceware.org/bugzilla/show_bug.cgi?id=17356
+
+	maint: avoid distcheck failure
+	* Makefile.am (EXTRA_DIST): Add .mailmap.
+
+2014-09-10  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: port recent fix to older pcre version
+	* src/pcresearch.c (Pexecute): Don't assume that a pcre_exec
+	that returns PCRE_ERROR_NOMATCH leaves its sub argument alone.
+	This assumption is false for libpcre-3 version 8.31-2ubuntu2.
+
+2014-09-09  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: -P now treats invalid UTF-8 input as non-matching
+	Problem reported by Santiago Vila in: http://bugs.gnu.org/18266
+	* NEWS: Mention this.
+	* src/pcresearch.c (Pexecute): Treat UTF-8 encoding errors
+	as non-matching data, instead of exiting 'grep'.
+	* tests/pcre-infloop: grep now exits with status 1, not 2.
+	* tests/pcre-invalid-utf8-input: grep now exits with status 0, not 2.
+
+2014-08-14  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fix integer-width bugs in undossify_input etc.
+	undossify_input bug reported by Vincent Lefevre in:
+	http://bugs.gnu.org/18269
+	* src/dosbuf.c (undossify_input): Return size_t, not int.
+	* src/grep.c (fillbuf): Work portably even if safe_read returns a
+	value greater than SSIZE_MAX, e.g., if there's an I/O error.
+
+2014-08-03  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: document LANGUAGE
+	Reported by Benno Schulenberg in: http://bugs.gnu.org/18185
+	* doc/grep.texi (Environment Variables): Document LANGUAGE.
+
+	doc: prefer @env to @code
+	Reported by Benno Schulenberg in: http://bugs.gnu.org/18184
+	* doc/grep.texi: Avoid @code in favor of @env, or of nothing at all.
+
+2014-07-11  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: Document -r vs --exclude more carefully.
+	Problem reported by Hugues Andreux in: http://bugs.gnu.org/17763
+	* doc/grep.texi (File and Directory Selection): Be more careful
+	about documenting the interaction between recursive searching,
+	--include, --exclude, and --exclude-dir.
+
+2014-06-27  Jim Meyering  <meyering@fb.com>
+
+	maint: split long lines, and enforce the 80-column limit
+	* cfg.mk (sc_long_lines): New rule, from coreutils; exempt tests/*
+	* src/grep.c (usage): Tweak -F wording to shorten a line.
+	Correct grammar in a comment.
+	Split the --exclude-file=... description to fit within 80 columns.
+	Use emit_bug_reporting_address, eliminating another long line.
+	* src/dfa.c: Split long lines.  No semantic change.
+	* doc/grep.texi: Likewise.
+	* tests/include-exclude: Split a long line.
+	* tests/backref: Split long lines.
+	* tests/empty: Likewise.
+	* tests/fmbtest: Likewise.
+
+	doc: update HACKING
+	* HACKING: Update from coreutils.
+
+	maint: generate distributed THANKS from VC'd THANKS.in
+	* Makefile.am (THANKS): New rule.
+	* THANKS.in: New file.
+	* THANKS: Remove.  Now it's generated from the combination of
+	THANKS.in and git logs.
+	* .mailmap: New file.
+	* cfg.mk (sc_THANKS_in_duplicates): New syntax-check rule, from
+	coreutils.
+	* .gitignore: Add THANKS.
+	* thanks-gen: New file, from coreutils.
+
+2014-06-27  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: with -E, unmatched ')' matches itself
+	Problem reported by Nathan Weeks in: http://bugs.gnu.org/17856
+	* src/grep.c (Ecompile): Also specify RE_UNMATCHED_RIGHT_PAREN_ORD.
+	* doc/grep.texi (Fundamental Structure), NEWS: Document this.
+	* tests/ere.tests: Add a couple of tests for this.
+	* tests/spencer1.tests: Fix exit status.
+
+2014-06-17  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: avoid -Wstack-protector
+	This allows the use of --enable-gcc-warnings on Gentoo and Ubuntu.
+	See: http://bugs.gnu.org/17793
+	* configure.ac (WERROR_CFLAGS): Avoid -Wstack-protector.
+
+	This can be worked around, but the cure is worse than the disease.
+
+2014-06-17  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: don't make output files read-only
+	This led to problems, such as the prompt "mv: try to overwrite
+	'egrep', overriding mode 0555 (r-xr-xr-x)? " during a build.
+	It can be worked around, but the cure is worse than the disease;
+	making output files read-only is more trouble than it's worth.
+	* doc/Makefile.am (grep.1, egrep.1, fgrep.1):
+	* lib/Makefile.am (colorize.c):
+	* src/Makefile.am (egrep fgrep):
+	Don't make output files read-only.  Prefer separate commands to
+	'&&' when either will do.
+
+2014-06-08  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: remove grep.spec
+	* grep.spec: Remove; obsolete and evidently not used.
+
+2014-06-07  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: use gnulib fdl module
+	* bootstrap.conf (gnulib_modules): Add fdl.
+	* doc/fdl.texi: Remove, as this now comes from gnulib.
+	* doc/.gitignore: Update to match current sources.
+
+2014-06-06  Jim Meyering  <meyering@fb.com>
+
+	build: improve rule to generate egrep+fgrep scripts
+	* src/Makefile.am (egrep fgrep): chmod a=rx generated files,
+	and remove $@-t before attempting to redirect to it, in case it
+	is read-only.
+
+	build: don't redirect directly to $@
+	* lib/Makefile.am (colorize.c): Don't redirect directly to target, $@.
+	Otherwise, we could create a corrupt colorize.c file with a
+	timestamp that indicates it is up to date.
+	Also, make the generated file read-only.
+
+2014-06-05  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: undo part of previous change
+	* src/dfa.c (enlist): Undo part of previous change that doesn't
+	look correct and doesn't help performance much anyway.
+
+	grep: use system strstr if available and fast
+	Problem reported by Norihiro Tanaka in: http://bugs.gnu.org/17700
+	* NEWS: Document this.
+	* bootstrap.conf (gnulib_modules): Add strstr.
+	* src/dfa.c (istrstr): Remove.
+	(enlist): Use strstr instead.  Wait until we need memory before
+	allocating it; this can save an unnecessary allocate and free.
+
+	build: update gnulib submodule to latest
+
+2014-06-03  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.20
+	* NEWS: Record release date.
+
+2014-05-30  Jim Meyering  <meyering@fb.com>
+
+	grep: fix --max-count=N (-m N) to stop reading after Nth match
+	With --max-count=N (-m N), grep is supposed to stop reading input
+	after it has found the Nth match.  However, a recent context-
+	related change made it so grep would always read to end of file.
+	* src/grep.c (prtext): Don't let a negative "out_after" value
+	make "pending" line count negative.
+	* tests/max-count-overread: New test, for this.
+	* tests/Makefile.am (TESTS): Add it.
+	* NEWS (Bug fixes): Mention it.
+	* THANKS: Add names of two recent bug reporters.
+	This bug was introduced by commit v2.18-139-g5122195.
+	Reported by Marc Aldorasi in http://bugs.gnu.org/17640.
+
+2014-05-29  Jim Meyering  <meyering@fb.com>
+
+	dfa: fix off-by-one under-allocation from recent change
+	Commit v2.19-10-gc32ff67 mistakenly made this change:
+	  -realloc_trans_if_necessary (d, 1);
+	  +realloc_trans_if_necessary (d, 0);
+	which led to a heap buffer overflow.
+	* src/dfa.c (dfaexec): Allocate space for one state, as before.
+
+2014-05-28  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: fix bug with regex containing multiple begin/end-line constraints
+	grep -E 'a(b$|c$)' would mistakenly match "aa".
+	* src/dfa.c (dfamust): When resetting 'is' in OR, also reset
+	'begline' and 'endline' of 'must'.
+	* NEWS (Bug fixes): Mention it.
+	This bug was introduced via commit v2.18-85-g2c94326.
+	Reported by Péter Radics in <http://bugs.gnu.org/17617>.
+
+2014-05-26  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: simplify building initial state
+	build_state_zero doesn't need the struct dfa to be initialized,
+	so remove the initialization and simplify.
+	* src/dfa.c (build_state_zero): Remove.
+	(dfaexec): Call realloc_trans_if_necessary and build_state directly.
+
+	dfa: revert "grep: do not count newline before the start of buffer"
+	This reverts commit 5dc3af2806d21455b818be3f9da26c372e4a7f8d.
+	The previous change renders that commit unnecessary.
+
+	dfa: do not clear the first state of a transition table
+	If number of DFA states reaches 1024, build_state clears transition
+	tables to save memory.  However, the initial state is always used,
+	so clearing it just wastes time.
+	* src/dfa.c (build_state): Do not clear the initial state's
+	transition and failure tables.
+
+	grep: remove unnecessary argument
+	* src/grep.c (do_execute): Remove argument 'start_ptr'.  It's always null.
+	All uses changed.
+
+2014-05-24  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: --exclude-dir=FOO/ now ignores the trailing slash
+	Problem reported by Khaled Ziyaeen; see: http://bugs.gnu.org/17481
+	* NEWS, doc/grep.texi (File and Directory Selection): Document this.
+	* src/grep.c (main): Implement this.
+	* tests/include-exclude: Test this.
+
+	dist: don't distribute lib/colorize.c
+	'configure' creates this file, so it shouldn't be distributed; see:
+	http://bugs.gnu.org/17480
+	* configure.ac (COLORIZE_SOURCE): New macro.
+	Don't use AC_CONFIG_LINKS for lib/colorize.c.
+	* lib/Makefile.am (nodist_libgreputils_a_SOURCES): New macro.
+	(libgreputils_a_SOURCES): Remove colorize.c.
+	(CLEANFILES): Add colorize.c
+	(colorize.c): New rule.
+
+2014-05-23  behoffski  <behoffski@grouse.com.au>
+
+	maint: uncapitalize first letter of two dfaerror message strings
+	* dfa.c (lex): Make two message strings consistent with all of
+	the others: do not capitalize the first letter of the first word.
+
+2014-05-23  Jim Meyering  <meyering@fb.com>
+
+	maint: revert "grep: port mb_next_wc to RHEL 6.5 x86-64"
+	This reverts commit v2.18-148-ga6ae68d.
+	Now that we have gnulib change v0.1-131-g2a045bc, "mbrlen, mbrtowc:
+	fix bug with empty input", this work-around is no longer needed.
+
+	gnulib: update, for mbrlen/mbrtowc empty input bug fix
+
+2014-05-22  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.19
+	* NEWS: Record release date.
+
+2014-05-21  Jim Meyering  <meyering@fb.com>
+
+	maint: avoid new false-positive syntax-check failure
+	* cfg.mk (exclude_file_name_regexp--sc_prohibit_doubled_word):
+	Exempt new test file that contains legitimate use of "in in".
+
+2014-05-17  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	tests: add test case for newline-count fix
+	* tests/count-newline: New test.
+	* tests/Makefile.am (TESTS): Add it.
+
+2014-05-16  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: do not count newline before the start of buffer
+	* src/dfa.c (build_state): When checking whether the previous
+	character was a newline, do not count any newline before the
+	start of the buffer.
+
+2014-05-15  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: port mb_next_wc to RHEL 6.5 x86-64
+	* src/searchutils.c (mb_next_wc): Work around glibc bug 16950; see:
+	https://sourceware.org/bugzilla/show_bug.cgi?id=16950
+	This bug was masked in the other GNU/Linux tests I made.  It was
+	exposed on RHEL 6.5 x86-64, where the compiler (GCC Red Hat 4.4.7-4)
+	happened to use temporaries in a different way.
+	Also see recent changes to the Gnulib documentation in this area:
+	http://lists.gnu.org/archive/html/bug-gnulib/2014-05/msg00013.html
+
+	tests: port mb-non-UTF8-performance to RHEL 6.5
+	* tests/mb-non-UTF8-performance (timeout): Use an integer,
+	as 'timeout 1.234' doesn't work in EUC locales.
+
+2014-05-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+	egrep, fgrep: port to Solaris 10 /bin/sh
+	This old shell doesn't grok ${0%/*}; see: http://bugs.gnu.org/17471
+	* src/Makefile.am (egrep fgrep): Don't assume the shell does substrings.
+	* src/egrep.sh (dir): New var, so that the substring calculation is
+	done only once (which is a small win even with newer shells),
+	and so that the calculation is easier to edit on older shells.
+
+2014-05-10  Jim Meyering  <meyering@fb.com>
+
+	maint: NEWS: adjust wording to reflect move
+	* NEWS (Improvements): Correct direction-relative wording,
+	now that the referent is below, not above.
+
+	maint: NEWS: move "Improvements" to the top
+	* NEWS: Move the small "Improvements" section to precede
+	the longer "Bug fixes" one.
+
+	gnulib: update submodule to latest, and bootstrap
+	* gnulib: Update submodule.
+	* bootstrap: Update from gnulib.
+
+2014-05-10  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: omit double includes
+	* src/dfa.c: Don't include stddef.h or stdbool.h, as dfa.h includes
+	them already, and it's the same module as we are.
+	Suggested by Aharon Robbins in: http://bugs.gnu.org/17458
+
+	dfa: fix bug with \< etc in multibyte locales
+	Problem reported by Stephane Chazelas in: http://bugs.gnu.org/16867
+	* NEWS: Document the fix.
+	* src/dfa.c (dfaoptimize): Remove any superset if changing from
+	UTF-8 to unibyte, and if the pattern has no backreferences.
+	(dfassbuild): In multibyte locales, treat \< \> \b \B as
+	backreferences in the DFA, since the DFA relies on unibyte
+	tests to check them.
+	(dfacomp): Optimize after building the superset, so that
+	dfassbuild can depend on d->multibyte.  A downside is that
+	dfaoptimize must remove supersets that are likely slower than the
+	DFA after optimization, but that's been done in the
+	above-described change.
+	* tests/Makefile.am (XFAIL_TESTS): Remove word-delim-multibyte,
+	since the test works now.
+
+	tests: add test case for -C 0 change
+	* tests/context-0: New test.
+	* tests/Makefile.am (TESTS): Add it.
+
+	grep: -A 0, -B 0, -C 0 now output a separator
+	Problem reported by Dan Jacobson in: http://bugs.gnu.org/17380
+	* NEWS:
+	* doc/grep.texi (Context Line Control): Document this.
+	* src/grep.c (prtext): Output a separator even if context is zero.
+	(main): Default context is now -1, not 0.
+
+2014-05-09  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: minor improvements to retry-DFA-superset patch
+	* src/dfasearch.c (EGexecute): Avoid unnecessary test in a context
+	where memrchr cannot return a null pointer.
+
+2014-05-09  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: retry DFA superset after matching multiple lines
+	* src/dfasearch.c (EGexecute): Without this patch, the code reverts
+	to KWset when the DFA superset matches multiple lines.
+	However, if the DFA superset matches multiple lines, it most likely
+	also matches a single line, and reverting to KWset means dfafast
+	won't work effectively.  Change the code so that it retries the DFA
+	superset immediately after it matches multipline lines.  On my platform
+	this improves the performance of "LC_ALL=C grep '\(ab\)cd\1d' k" from
+	3.48 to 2.14 seconds realtime, where k contains the output of
+	"yes abcdabc | head -50000000".
+
+	dfa: fix inconsistency in multibyte locales
+	* src/dfa.c (dfaexec): Use the same exit condition in multibyte
+	locales as in unibyte.
+
+2014-05-08  Jim Meyering  <meyering@fb.com>
+
+	maint: mark some breakless cases with /* fallthrough */ comment
+	* src/dfa.c (addtok_mb, dfaanalyze): Add comment so that it is
+	clear that the "break" statement is deliberately omitted.
+
+2014-05-08  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: assume C89 for CHAR_BIT
+	* src/dfa.c (CHARBITS): Remove.  All uses replaced by CHAR_BIT.
+	(NOTCHAR): Now an enum, since it need not be a macro.
+
+	dfa: don't assume unsigned int is exactly 32 bits wide
+	Sun C 5.12 (sparc) warns of the potential unportability.
+	* src/dfa.c (charclass_word): New type, for clarity.
+	All relevant uses of 'unsigned' changed.
+	(CHARCLASS_WORD_BITS): Rename from INTBITS.  All uses changed.
+	Now an enum, since it needn't be a macro.
+	(CHARCLASS_WORD_MASK): New macro.
+	(CHARCLASS_WORDS): Rename from CHARCLASS_INTS.  All uses changed.
+	(setbit, clrbit): Cast 1 to charclass_word, for clarity.
+	(notset, add_utf8_anychar, dfastats):
+	Don't assume unsigned int is exactly 32 bits wide.
+	(dfastate): Don't rely on implementation-defined conversion of
+	greater-than-INT_MAX unsigned to int.  Change bit test to resemble
+	tstbit more.
+
+	maint: fix indenting to pacify 'prohibit_tab_based_indentation'
+	* src/dfa.c: Use spaces and not tabs to indent some lines.
+
+	grep: simplify and clarify invert-related code
+	* src/grep.c (out_invert, prtext): Use bool for booleans.
+	(prline): Remove unnecessary '!!' on a value that is always 0 or 1.
+	(prtext): Remove last arg NLINESP; use !out_invert instead.  All uses
+	changed.  Move decls to nearer uses, since we can assume C99 here.
+	Update 'outleft' and 'after_last_match' here; it's simpler.
+	(grepbuf): Compute return value by subtracting new from old 'outleft',
+	rather than by keeping a separate running total.  Avoid code duplication
+	by arranging for prtext to be called from one place, not three.
+
+2014-05-08  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: improve performance of -v when combined with -L, -l or -q
+	Problem reported by Jörn Hees in: http://bugs.gnu.org/17427
+	* src/grep.c (grepbuf, grep): When -v is combined with -L, -l, or -q,
+	don't read data unnecessarily after a non-match is found.
+
+2014-05-06  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: mention performance changes
+	* NEWS: Discuss recent performance improvements and downgrades.
+
+	dfa: clarify use of "if"
+	The phrase "Y is true if X" is logically equivalent to "X implies Y",
+	but often "X if and only if Y" was intended.
+	* src/dfa.c, src/dfa.h: Reword to avoid the incorrect use of "if".
+
+	dfa: minor performance improvement for previous change
+	* src/dfa.c (struct dfa): New member 'fast'.  Remove 'has_backref'.
+	All uses changed.
+
+2014-05-06  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: speed up 'dfaisfast'
+	* src/dfa.c (struct dfa): New member 'has_backref'.
+	(addtok_mb): Set it.
+	(dfaisfast): Use it.
+
+2014-05-05  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fix -w match next to a multibyte letter
+	* NEWS: Document this.
+	* src/dfasearch.c, src/kwsearch.c (WCHAR): Remove.
+	(wordchar): New static function.
+	* src/dfasearch.c (EGexecute):
+	* src/kwsearch.c (Fexecute): Use the new functions, so that the
+	code works correctly if a multibyte character adjacent to the
+	match has two or more bytes.
+	* src/search.h, src/searchutils.c (mb_prev_wc, mb_next_wc):
+	New functions.
+	* tests/word-delim-multibyte: Add a test for grep -w (which now
+	passes), and a test for \> (which still fails).  The \< test also
+	still fails.
+
+	grep: improve internal API for multibyte boundary
+	* src/search.h, src/searchutils.c (mb_goback): Rename from
+	is_mb_middle.  Omit last arg.  Return number of bytes to go back,
+	not just a boolean.  All uses changed.
+	* src/dfasearch.c (EGexecute):
+	* src/kwsearch.c (Fexecute): Adjust to API change.
+	* src/kwsearch.c (Fexecute): Eliminate common subexpression.
+
+	grep: fix encoding-error incompatibilities among regex, DFA, KWset
+	This follows up to http://bugs.gnu.org/17376 and fixes a different
+	set of incompatibilities, namely between the regex matcher and the
+	other matchers, when the pattern contains encoding errors.
+	The GNU regex matcher is not consistent in this area: sometimes
+	an encoding error matches only itself, and sometimes it
+	matches part of a multibyte character.  There is no documentation
+	for grep's behavior in this area and users don't seem to care,
+	and it's simpler to defer to the regex matcher for problematic
+	cases like these.
+	* NEWS: Document this.
+	* src/dfa.c (ctok): Remove.  All uses removed.
+	(parse_bracket_exp, atom): Use BACKREF if a pattern contains
+	an encoding error, so that the matcher will revert to regex.
+	* src/dfasearch.c, src/grep.c, src/pcresearch.c, src/searchutils.c:
+	Don't include dfa.h, since search.h now does that for us.
+	* src/dfasearch.c (EGexecute):
+	* src/kwsearch.c (Fexecute): In a UTF-8 locale, there's no need to
+	worry about matching part of a multibyte character.
+	* src/grep.c (contains_encoding_error): New static function.
+	(main): Use it, so that grep -F is consistent with plain fgrep
+	when the pattern contains an encoding error.
+	* src/search.h: Include dfa.h, so that kwsearch.c can call using_utf8.
+	* src/searchutils.c (is_mb_middle): Remove UTF-8-specific code.
+	Callers now ensure that we are in a non-UTF-8 locale.
+	The code was clearly wrong, anyway.
+	* tests/fgrep-infloop, tests/invalid-multibyte-infloop:
+	* tests/prefix-of-multibyte:
+	Do not require that grep have a particular behavor for this test.
+	It's OK to match (exit status 0), not match (exit status 1), or
+	report an error (exit status 2), since the pattern contains an
+	encoding error and grep's behavior is not specified for such
+	patterns.  Test only that KWset, DFA, and regex agree.
+	* tests/prefix-of-multibyte: Add tests for ABCABC and __..._ABCABC___.
+
+2014-05-04  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: minor simplification
+	* src/dfa.c (parse_bracket_exp): Use enum, not macro, and move var
+	to just the scope it's needed.
+
+	grep: simplify and fix problems with KWset-DFA agreement patch
+	* src/dfa.c (dfambcache, parse_bracket_exp): Simplify.
+	(mbs_to_wchar, wctok, FETCH_WC, match_anychar, match_mb_charset)
+	(check_matching_with_multibyte_ops, transit_state_consume_1char)
+	(transit_state, dfaexec): Use wint_t, not wchar_t, so that
+	WEOF is treated correctly on platforms where WEOF is not a valid
+	wchar_t value.
+	(ctok, lex): Use int, not unsigned int, for characters,
+	so that EOF is treated more naturally.
+	(parse_bracket_exp): Use NOTCHAR to mark uninitialized char, since
+	FETCH_WC can now set the char to EOF.
+	(lex): Remove unnecessary test for EOF.
+	(parse_bracket_exp, atom): Swap then and else parts, to put
+	the small one first; this is more readable here.
+	* src/searchutils.c (is_mb_middle): Simplify.
+
+	tests: improve coverage for prefix-of-multibyte
+	* tests/prefix-of-multibyte: Also test the regex version.
+
+2014-05-04  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: make KWset and DFA agree about invalid sequences in patterns
+	See: http://bugs.gnu.org/17376
+	* src/dfa.c (dfambcache): Don't cache invalid sequences, because they can't be
+	represented by wide characters.
+	(dfambcache, mbs_to_wchar): Return WEOF for invalid sequences.
+	(ctok): New global variable.
+	(parse_bracket_exp, atom, match_anychar, match_mb_charset): Don't allow WEOF.
+	(lex): Set 'ctok'.
+	* src/kwsearch.c (Fexecute):
+	* src/searchutils.c (is_mb_middle): Don't check here.
+	* tests/invalid-multibyte-infloop: Adjust to fixed behavior.
+	* tests/prefix-of-multibyte: Add test cases for this bug.
+
+2014-05-03  Jim Meyering  <meyering@fb.com>
+
+	maint: make ChangeLog generation more robust
+	* Makefile.am (gen-ChangeLog): Sync changes from GNU coreutils,
+	to ensure exit status is propagated, and to support an optional
+	git-log-fix file.
+
+2014-05-03  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: clarify EGexecute slightly
+	* src/dfasearch.c (EGexecute): Change if-then-else to !if-else-then.
+
+2014-05-03  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: fix the bug in previous patch.
+	* src/dfasearch.c (EGexecute): Do it.
+
+2014-04-30  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: simplify EGexecute further
+	* src/dfa.c, src/dfa.h (dfasuperset): Arg is now const pointer.
+	Now pure.
+	* src/dfasearch.c (EGexecute): Coalesce some duplicate code.
+	Don't worry about memrchr returning NULL when that's impossible.
+
+2014-04-30  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: adjust timing back to kwset when dfaisfast is true
+	* src/dfasearch.c (EGexecute): If DFA fails after kwset succeeds,
+	the code doesn't return to kwset until it reaches the end of the buffer
+	or finds a match.  Because of this, although some cases speed up,
+	others slow down.
+
+	Adjust the heuristic for switching to the DFA, so that it
+	is more likely to switch at the right times.
+
+2014-04-30  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: simplify superset
+	* src/dfa.h (dfahint): Remove decl.
+	(dfasuperset): New decl.
+	* src/dfa.c (dfahint): Remove.
+	(dfassbuild): Rename from dfasuperset.
+	(dfasuperset): New function.  It returns the superset of D.
+	* src/dfasearch.c: Use dfasuperset instead of dfahint, and simplify.
+
+	dfa: optimize memory allocation
+	* src/dfa.c (epsclosure): get the value of 'visited' from the argument.
+	(dfaanalyze): Define and allocate variable 'visited'.
+	(dfastate): Use not 'insert' but 'merge' to insert positions for
+	state 0 of DFA.
+
+2014-04-29  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	kwset: improve performance by inlining tr
+	Without this change, older versions of GCC won't inline 'tr', and this
+	can hurt performance significantly.  See: http://bugs.gnu.org/17229#64
+	* src/kwset.c (tr): Make it inline.
+
+2014-04-27  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest
+	* gnulib: This fixes a bug whereby running bootstrap
+	would remove our build-aux/git-log-fix file.
+
+2014-04-27  Paul Eggert  <eggert@cs.ucla.edu>
+
+	kwset: improve performance by inlining more
+	Problem reported by Norihiro Tanaka in <http://bugs.gnu.org/17229#55>.
+	* src/kwset.c (bmexec_trans): Rename from bmexec, and make it inline.
+	(bmexec): New implementation, which calls bmexec_trans.  This helps
+	GCC inline more aggressively with the default optimization, and
+	improves performance 25% with the reported benchmark on my host.
+
+2014-04-26  Paul Eggert  <eggert@cs.ucla.edu>
+
+	kwset: speed up by using memchr2
+	Idea suggested by Eric Blake in: http://bugs.gnu.org/17229#43
+	* bootstrap.conf (gnulib_modules): Add memchr2.
+	* src/kwset.c: Include stdint.h, for uintptr_t.  Include memchr2.h.
+	(struct kwset): New members gc1, gc2, gc1help.
+	(tr): Move earlier, so it can be used earlier.
+	(kwsprep): Initialize struct kwset's new members.
+	(memchr_kwset): Rename from memchr_trans.  Combine C and TRANS args into
+	new arg KWSET.  All uses changed.  Use memchr2 when appropriate.
+	(bmexec): Use new members instead of recomputing their values.
+	Increase advance_heuristic; it's just a guess, but memchr2 probably
+	makes it reasonable to increase it.
+
+	kwset: improve performance when large Boyer-Moore key doesn't match
+	* src/kwset.c (bmexec): As a heuristic, prefer memchr to seeking
+	by delta1 only when the latter doesn't advance much.
+
+	dfa: fix index bug in previous patch, and simplify
+	* src/dfa.c, src/dfa.h (dfaisfast): Arg is const pointer.
+	* src/dfa.c (dfaisfast): Simplify, since supersets never contain BACKREF.
+	* src/dfa.h (dfaisfast): Declare to be pure.
+	* src/dfasearch.c (EGexecute): Fix typo that could cause buffer
+	read overrun when !dfafast.  Hoist duplicate computation out
+	of an if's then and else parts.
+
+2014-04-26  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: speed up for a case to repeat failure in DFA after success in kwset
+	A DFA is typically much faster if it is unibyte and does not set BACKREF.
+	Skip kwset if the DFA is fast.  For example:
+
+	    yes abcdabc | head -50000000 >k
+	    env LC_ALL=C time -p src/grep -i 'abcd.bd' k
+
+	This improved real-time from 4.86 to 1.34 s.
+
+	* src/dfa.c, src/dfa.h (dfaisfast): New function.
+	* src/dfasearch.c (EGexecute): Use it.
+
+2014-04-24  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: fix recently-introduced memory leak
+	Problem reported by Aharon Robbins in: http://bugs.gnu.org/17341
+	* src/dfa.c (dfasuperset): free after dfafree.
+
+	misc: fix doc and test bugs re grep -z
+	Problem reported by Stephane Chazelas in: http://bugs.gnu.org/16871
+	* doc/grep.texi (Usage): Remove incorrect example with -P.
+	* tests/pcre: Improve test so that it actually tests whether \s
+	matches a newline.
+
+	dfa: minor simplification of dfaexec
+	* src/dfa.c (dfaexec): Streamline updating of returned values.
+	Don't bother to check d->multibyte before updating mbp.
+	Avoid duplicate p > end test.
+
+2014-04-24  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: simplify and be more consistent about MB_CUR_MAX
+	* src/dfa.c (struct dfa): New member 'multibyte',
+	replacing 'mb_cur_max'.  All uses changed.  Use this new member
+	consistently, instead of sometimes referring to MB_CUR_MAX directly.
+
+	dfa: fix comment
+	* src/dfa.c (maybe_realloc): Fix comment to match behavior better.
+
+2014-04-24  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: skip checking of multibyte character boundary, reaching at eolbyte
+	* src/dfa.c (dfaexec): Skip checking of multibyte character boundary,
+	reaching at eolbyte.
+
+2014-04-24  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: fix incorrect comment that led to heap overrun
+	* dfa.c (maybe_realloc): Fix comment to match behavior.
+
+	dfa: minor tuneup of dfamust memory savings patch
+	* src/dfa.c (allocmust): Use xmalloc, not xzalloc.
+	Initialize the must completely, so that the caller need not
+	invoke resetmust.  All callers changed.
+	(dfamust): Omit asserts that aren't needed on typical machines
+	where dereferencing NULL dumps core.  Don't leak memory if the
+	pattern contains a NUL byte.
+
+2014-04-24  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: avoid wasting memory for large patterns in dfamust
+	* src/dfa.c (struct must): New member 'prev'.  It points to the
+	previous must.
+	(allocmust): New function.
+	(freemust): New function.
+	(dfamust): Use it.
+
+2014-04-24  Jim Meyering  <meyering@fb.com>
+
+	grep: fix new heap write buffer overrun
+	* src/dfa.c (parse_bracket_exp): Fix off-by-one allocation error.
+	Exposed by running the tests with an ASAN-enabled binary (i.e.,
+	created using gcc's -fsanitize=address option).  Introduced by
+	commit v2.18-70-gd3d9612, "dfa: simplify range char allocation".
+
+2014-04-24  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: suppress unsafe-loop-optimizations warnings
+	I ran into one of these while trying out GCC 4.9.0's new
+	-fsanitize=undefined option.  The warning told me that GCC didn't
+	do an unsafe optimization, but in 'grep' this is not typically a
+	symptom of a programming error.
+	* configure.ac (WERROR_CFLAGS): Suppress -Wunsafe-loop-optimizations.
+
+2014-04-23  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: fix memory leak reintroduced by previous patch
+	Reported by Norihiro Tanaka in <http://bugs.gnu.org/17328#16>.
+	* src/dfa.c (dfaexec): Allocate mb_match_lens and mb_follows only
+	if not already allocated.
+	(free_mbdata): Null out mb_match_lens to mark it as being freed.
+
+2014-04-23  Jim Meyering  <meyering@fb.com>
+
+	tests: use consistent spelling for locale name, en_US.UTF-8
+	* tests/pcre-infloop: Spell locale name, en_US.UTF-8, consistently,
+	converting this one use from "en_US.utf8", which would provoke a
+	test failure on OS/X.
+
+2014-04-23  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: omit static variables that limited dfaexec to one struct dfa
+	Problem reported by Aharon Robbins in: http://bugs.gnu.org/17328
+	* src/dfa.c (struct dfa): New member mbs.
+	mb_follows is now a position_set, not a pointer to one;
+	this simplifies memory allocation.  All uses changed.
+	(mbs_to_wchar): Put DFA arg at the end, in place of the mbstate_t *arg,
+	since the DFA now contains an mbstate_t.  All uses changed.
+	(mbs): Remove static variable.
+	(dfaexec): Remove static bool that attempted to optimize memory
+	allocation, as this wasn't correct for Gawk.  Perhaps we can think
+	of a better way to optimize memory.
+
+2014-04-22  Paul Eggert  <eggert@cs.ucla.edu>
+
+	kwset: simplify and speed up Boyer-Moore unibyte -i in some cases
+	This improves the performance of, for example,
+	yes jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj | head -10000000 | grep -i jk
+	in a unibyte locale.
+	* src/kwset.c (memchr_trans): New function.
+	(bmexec): Use it.  Simplify the code and remove some of the
+	confusing gotos and breaks and labels.  Do not treat glibc memchr
+	as a special case; if non-glibc memchr is slow, that is lower
+	priority and I suppose we can try to work around the problem in
+	gnulib.
+
+2014-04-22  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: speed-up by using memchr() in Boyer-Moore searching
+	memchr() of glibc is faster than seeking by delta1 on some platforms.
+	When there is no chance to match for a while, use it on them.
+	* src/kwset.c (bmexec): Use memchr() in Boyer-Moore searching.
+
+2014-04-22  Paul Eggert  <eggert@cs.ucla.edu>
+
+	kwset: simplify Boyer-Moore with unibyte -i
+	This change doesn't significantly affect performance on my platform,
+	and should make the code easier to maintain.
+	* src/kwset.c (BM_DELTA2_SEARCH, LAST_SHIFT, TRANS):
+	Remove these macros, in favor of ...
+	(tr, bm_delta2_search): New functions.  All uses changed.
+	The latter function is inline because this improves code size and
+	runtime CPU slightly on x86-64 with gcc -O2 (GCC 4.9.0).
+	(bmexec): Prefer tr when that's simpler.
+
+2014-04-22  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: may also use Boyer-Moore algorithm for case-insensitive matching
+	* src/kwset.c (BM_DELTA2_SEARCH, LAST_SHIFT, TRANS): New macro.
+	(bmexec): Use character translation table.
+	(kwsexec): Call bmexec for case-insensitive matching.
+	(kwsprep): Change the `if' condition.
+
+2014-04-21  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: -P now rejects invalid input sequences in UTF-8 locales
+	See <http://bugs.gnu.org/17245> and <http://bugs.exim.org/1468>.
+	* NEWS: Document this.
+	* src/pcresearch.c (Pexecute): Do not use PCRE_NO_UTF8_CHECK,
+	as this leads to undefined behavior when the input is not UTF-8.
+	* tests/pcre-infloop, tests/pcre-invalid-utf8-input:
+	Exit status is now 2, not 1, when grep -P is given invalid UTF-8
+	data in a UTF-8 locale.
+
+	dfa: minor improvements to previous patch
+	* src/dfa.c (dfamust): Use &=, not if-then.
+	* src/dfa.h (struct dfamust):
+	* src/dfasearch.c (begline, hwsmusts): Use bool for boolean.
+	* src/dfasearch.c (kwsmusts):
+	* src/kwsearch.c (Fcompile): Prefer decls after statements.
+	* src/dfasearch.c (kwsmusts): Avoid conditional branch.
+	* src/kwsearch.c (Fcompile): Unify the two calls to kwsincr.
+
+2014-04-21  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: speed-up for exact matching with begline and endline constraints.
+	dfamust turns on the flag when a state exactly matches the proposed one.
+	However, when the state has begline and/or endline constraints, turns
+	off it.
+
+	This patch enables to match a state exactly, even if the state has
+	begline and/or endline constraints.  If a exact string has one of their
+	constrations, the string adding eolbyte to a head and/or foot is pushed
+	to kwsincr().  In addition, if it has begline constration, start
+	searching from just before the position of the text.
+
+	* src/dfa.c (variable must): New members `begline' and `endline'.
+	(dfamust): Consideration of begline and endline constrations.
+	* src/dfa.h (struct dfamust): New members `begline' and `endline'.
+	* src/dfasearch.c (kwsmusts): If a exact string has begline constration,
+	start searching from just before the position of the text.
+	(EGexecute): Same as above.
+	* src/kwsearch.c (Fexecute): Same as above.
+
+2014-04-20  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: fix bug that caused NUL to be mishandled in patterns
+	This bug was introduced in the early-2012 patches that fixed some
+	context-handling bugs.  Bisecting found commit
+	d8951d3f4e1bbd564809aa8e713d8333bda2f802 (2012-02-05 18:00:43 +0100),
+	but it apears the underlying problem was introduced in commit
+	8b47c4cf6556933f59226c234b0fe984f6c77dc7 (2012-01-03 11:22:09 +0100).
+	* NEWS: Mention bug fix.
+	* src/dfa.c (char_context): Consider NUL to be a newline only if -z.
+	* tests/Makefile.am (TESTS): Add null-byte.
+	* tests/null-byte: New file.
+
+2014-04-19  Jim Meyering  <meyering@fb.com>
+
+	build: reenable some compiler warning options
+
+2014-04-18  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: fix pointer type conversion bug
+	The code converted between size_t * and ptrdiff_t *, which wasn't
+	diagnosed by modern x86-64 GCC but isn't portable.  Problem
+	reported by Norihiro Tanaka in <http://bugs.gnu.org/17136#31>.
+	* configure.ac (WERROR_CFLAGS): Don't add -Wno-pointer-sign.
+	We want GCC to diagnose pointer signedness problems, as they
+	violate the C standard and other compilers no doubt complain too.
+	* src/dfa.c (struct dfa): Change type of salloc to size_t.
+	(realloc_trans_if_necessary): Convert signed value to size_t before
+	passing its address to x2nrealloc.  Changing the type of tralloc
+	to size_t might have led to problems elsewhere.
+
+2014-04-18  Jim Meyering  <meyering@fb.com>
+
+	maint: Revert "dfa: avoid new NULL dereference"
+	This reverts commit 5190041fe515743ef4545abf287d243bc025c701.
+	It was only a bug if one neglected to update to the latest gnulib.
+	With the newer xn2realloc, there is no problem.
+
+	dfa: avoid new NULL dereference
+	* src/dfa.c (dfa_charclass_index): Restore a "+ 1" mistakenly omitted
+	during recent improvements.  Introduced in v2.18-66-g6a60fd5.
+
+2014-04-17  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: minor cleanup
+	* src/dfa.c (MAX): Remove; no longer used.
+
+2014-04-17  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: speed up by checking multibyte characters on demand
+	If dfaexec() runs in non-UTF8 locales, length and wide character
+	representation are checked for all characters of a line in a input
+	string.  However, if matched early in the line, results for remaining
+	characters are wasted.
+
+	This patch checks multibyte characters on demand.  It should work
+	faster for early matches, and reduces memory requirements.
+
+	* src/dfa.c (struct dfa): Remove members mblen_buf, nmblen_buf,
+	inputwcs, ninputwcs.  All uses removed.
+	(buf_begin, buf_end, prepare_wc_buf): Remove.  All uses removed.
+	(SKIP_REMAINS_MB_IF_INITIAL_STATE): Remove.  This is now expanded
+	when used.
+	(match_anychar, match_mb_charset, check_matching_with_multibyte_ops):
+	New arg wc, mbclen.  Remove arg idx.  All uses changed.
+	(transit_state_consume_1char): New arg wc.  All uses changed.
+	(transit_state): New arg 'end'.  All uses changed.
+
+2014-04-17  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: trans reallocation microoptimization
+	* src/dfa.c (realloc_trans_if_necessary):
+	Help the compiler avoid unnecessary reloads.
+
+	dfa: simplify dfmust initialization
+	* src/dfa.c (dfamust): Don't initialize musts twice.
+	Use zcalloc, not xmalloc followed by zeroing.
+	Make result a const pointer.
+
+	dfa: simplify freelist
+	* src/dfa.c (freelist): Don't null out array while freeing its
+	pointers; the caller can do that if needed.
+	(resetmust): Null out zeroth entry of array.
+
+	dfa: avoid duplicate strlen when allocating memory
+	* src/dfa.c (dfamust): Use xstrdup, not strlen (twice) + xmemdup.
+
+	dfa: simplify memory allocation
+	* src/dfa.c (icatalloc, freelist, enlist, comsubs, addlists, inboth)
+	(dfamust): Don't worry about null arguments or results,
+	as memory allocators no longer can return null pointers.
+	(dfamust): Invoke malloc just once when building a concatenated string.
+
+	dfa: simplify position set and element count allocation
+	* src/dfa.c (dfaanalyze): Allocation position set info all at one go,
+	and similarly for element count info.
+
+	dfa: simplify multibyte_prop allocation
+	* src/dfa.c (struct dfa): Simplify by removing nmultibyte_prop;
+	it should always be the same as talloc.  All uses changed.
+
+	dfa: simplify range char allocation
+	* src/dfa.c (struct dfa): Simplify by allocating one array of ranges
+	rather than one for range starts and another for range ends.
+	All uses changed.
+
+	dfa: simplify transition table allocation
+	* src/dfa.c (struct dfa): Remove member 'realtrans', as it can
+	be computed from 'trans'.  All uses changed.
+	(realloc_trans_if_necessary): Move earlier, to avoid a forward decl.
+	Use x2nrealloc to compute new size, rather than doing it by hand,
+	which omits a check for unlikely overflow.
+	(realloc_trans_if_necessary, dfafree): Adjust to the fact that
+	d->trans now might be either NULL, or 1 + the pointer to free.
+	(build_state, build_state_zero): Use realloc_trans_if_necessary
+	instead of duplicating its code.
+
+	dfa: better size-overflow check
+	* src/dfa.c (dfasuperset): Let xnmalloc do the multiplication,
+	to check for size arithmetic overflow better.
+
+	dfa: avoid unnecessary work and other initialization
+	* src/dfa.c (dfaanalyze, dfainit):
+	Don't bother allocating when x2nrealloc will do it for us.
+	(dfastate): Allocate grps and labels on the stack, as their
+	size is known at compile time.
+	(build_state): Use xmalloc, not xnmalloc, since the multiplication
+	can be done at compile-time.
+
+	dfa: clarify memory allocation and port to IRIX
+	This change was prompted by a porting problem:
+	IRIX defines its own MALLOC macro, which clashes with ours.
+	More generally, the MALLOC etc. macros are confusing, as they
+	look like functions but do not have C-function semantics.
+	A functional style makes the code easier to read, and though
+	it lengthens the code a bit here it'll make other
+	simplifications easier.
+	* src/dfa.c (XNMALLOC, XCALLOC, CALLOC, MALLOC, REALLOC): Remove.
+	All uses replaced by xnmalloc etc.
+	(REALLOC_IF_NECESSARY): Remove; all uses replaced by ....
+	(maybe_realloc): New function.
+	(copy, merge): Free and allocate rather than realloc, as we
+	needn't save the contents.
+
+2014-04-14  Jim Meyering  <meyering@fb.com>
+
+	tests: detect an infloop-inducing bug in grep -P (pcre-8.35)
+	* tests/pcre-infloop: New test.
+	* tests/Makefile.am (TESTS): Add it.
+
+2014-04-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+2014-04-11  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: improvements for the open-CSET patch
+	* src/dfa.c (dfamust): Simplify by removing some duplicate code.
+	Optimize patterns like [aaa] even when not case-folding.
+	Avoid an unnecessary copy of the charclass.
+
+2014-04-11  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: open CSET and transform into uppercase when MB_CUR_MAX == 1
+	In unibyte locales with -i, kwset matching isn't helpful, because
+	dfamust doesn't extract the CSET entries.  Fix dmamust so that it
+	does that, and makes it possible to take out a longer fixed string
+	from tokens.
+	* src/dfa.c (dfamust): open CSET and transform into uppercase
+	when MB_CUR_MAX == 1.
+
+2014-04-11  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: cleanup for HAS_DOS_FILE_CONTENTS issue
+	While cleaning up the empty-string fix, I noticed that one part of
+	the code worried about CRLF in pattern files whereas another part
+	did not.  Fix this by using the same approach in both places,
+	and make the CRLF code more modular in the process.
+	* src/dosbuf.c (dos_binary, dos_unix_byte_offsets): New functions.
+	(undossify_input, dossified_pos): Do nothing if ! O_BINARY.
+	* src/grep.c: Always include dosbuf.c so that the code is
+	checked statically even on non-DOS hosts.
+	(dos_binary, dos_unix_byte_offsets): New decls.
+	(undossify_input): Declare unconditionally.
+	* src/grep.c (fillbuf, print_line_head, main):
+	* src/kwsearch.c (Fcompile):
+	Simplify by not worrying about HAVE_DOS_FILE_CONTENTS.
+	* src/grep.c (main): fopen with "rt" if O_TEXT; this is simpler
+	than worrying about HAVE_DOS_FILE_CONTENTS elsewhere.
+	* src/system.h (HAVE_DOS_FILE_CONTENTS): Remove.
+
+	grep: cleanup for empty-string fix
+	* NEWS: Document it.
+	* src/dfasearch.c (GEAcompile):
+	* src/kwsearch.c (Fcompile):
+	Use C99-style decls to simplify.  Avoid duplicate code.
+	* tests/empty-line: Add some more tests like this.
+
+2014-04-11  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: no match for the empty string included in multiple patterns
+	* src/dfasearch.c (EGAcompile): Fix it.
+	* src/kwsearch.c (Fcompile): Fix it.
+
+2014-04-08  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: remove bool_bf
+	The extra complexity of this microoptimization wasn't ever much help,
+	and currently it generated bigger code with gcc -O2 (x86-64).
+	* src/dfa.c (bool_bf): Remove.  All uses replaced by plain 'bool',
+	without a bitfield.
+
+2014-04-08  Jim Meyering  <meyering@fb.com>
+
+	maint: avoid sc_po_check syntax-check failure (kwset.c)
+	* po/POTFILES.in: Remove kwset.c from this list, since it
+	no longer contains a translatable diagnostic.
+
+2014-04-08  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: port better to hosts with nonstandard nl_langinfo
+	On some hosts, nl_langinfo returns strings other than "UTF-8" when
+	UTF-8 is used, and (worse) return "UTF-8" even if the encoding is
+	single-byte.  Work around these problems by trying a sample
+	character instead.
+	* src/dfa.c, src/pcresearch.c, src/searchutils.c:
+	Don't include <langinfo.h>.
+	* src/dfa.c (using_utf8): Test for UTF-8 by trying a character
+	rather than by invoking nl_langinfo (CODESET); this is more
+	portable in practice, and removes a dependency on
+	HAVE_LANGINFO_CODESET.
+	* src/pcresearch.c: Include dfa.h, for using_utf8.
+	(Pcompile): Use using_utf8 rather than nl_langinfo.
+
+2014-04-07  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: prefer bool in DFA internals
+	* src/dfa.c (bool_bf): New type.
+	(dfa_state): Use it, as this seems to generate slightly better
+	code with GCC.
+	(struct mb_char_classes, struct dfa, equal, case_fold, dfasyntax)
+	(laststart, parse_bracket_exp, lex, dfaparse, dfaanalyze, dfastate)
+	(match_mb_charset, dfamust):
+	Use bool for boolean.
+	(using_utf8) [!HAVE_LANGINFO_CODESET]: Tune.
+	(dfaanalyze): Prefer & to && and | to || on booleans; it's simpler here.
+	(dfastate): Simplify charclass nonzero testing.  Redo has_mbcset
+	test so that the compiler's more likely to optimize it.
+
+2014-04-07  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: prefer regex to DFA for ANYCHAR in multibyte locales
+	* src/dfa.c (dfa_state): New member has_mbcset.
+	Rename backref to has_backref, and make it of type bool too.
+	All uses changed.
+	(state_index, dfastate): Initialize new member.
+	(dfaexec): Prefer regex to DFA for ANYCHAR in multibyte locales.
+
+2014-04-07  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: remove trival_case_ignore
+	This optimization is no longer needed, given the other
+	optimizations recently installed.  Derived from a patch by
+	Norihiro Tanaka; see <http://bugs.gnu.org/17019>.
+	* bootstrap.conf (gnulib_modules): Remove assert-h.
+	* src/dfa.c (CASE_FOLDED_BUFSIZE): Move here from dfa.h.
+	Remove now-unnecessary static assert.
+	(case_folded_counterparts): Now static.
+	* src/dfa.h (CASE_FOLDED_BUFSIZE, case_folded_counterparts):
+	Remove decls; no longer public.
+	* src/dfasearch.c (kwsmusts): Use kwset even if fill MB_CUR_MAX > 1
+	and case-insensitive.
+	* src/grep.c (MBRTOWC, WCRTOMB): Remove.
+	(fgrep_to_grep_pattern): Use mbrtowc, not MBRTOWC.
+	(trivial_case_ignore): Remove; this optimization is no longer needed.
+	All uses removed.
+
+	grep: simplify memory allocation in kwset
+	* src/kwset.c: Include kwset.h first, to check its prereqs.
+	Include xalloc.h, for xmalloc.
+	(kwsalloc): Use xmalloc, not malloc, so that the caller need not
+	worry about memory allocation failure.
+	(kwsalloc, kwsincr, kwsprep): Do not worry about obstack_alloc
+	returning NULL, as that's not possible.
+	(kwsalloc, kwsincr, kwsprep, bmexec, cwexec, kwsexec, kwsfree):
+	Omit unnecessary conversion between struct kwset * and kwset_t.
+	(kwsincr, kwsprep): Return void since memory-allocation failure is
+	not possible now.  All uses changed.
+	* src/kwset.h: Include <stddef.h>, for size_t, so that this
+	include file doesn't require other files to be included first.
+
+	grep: minor cleanups for Galil speedups
+	* src/kwset.c: Update citations.
+	Include stdbool.h.
+	(kwsincr, kwsprep): Clarify by using C99 decls after statements.
+	(kwsprep): Clarify by using MIN.  Avoid a couple of buffer copies
+	when !TRANS.
+	(bmexec): Use bool for boolean.  Prefer "continue;" to ";".
+
+2014-04-07  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: use the Galil rule for Boyer-Moore algorithm in KWSet
+	The Boyer-Moore algorithm is O(m*n), which means it may be much
+	slower than the DFA.  Its Galil rule variant is O(n) and increases
+	efficiency in the typical case; it skips sections that are known
+	to match and does not compare more than once for a position in the text.
+	To use the Galil rule, look for the delta2 shift at each position
+	from the trie instead of the 'mind2' value.
+	* src/kwset.c (struct kwset): Replace member 'mind2' with 'shift'.
+	(kwsprep): Look for the delta2 shift.
+	(bmexec): Use it.
+
+2014-04-06  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: cleanup DFA superset optimization
+	* src/dfa.c (dfa_charclass_index): New function, with body of
+	old dfa_charclass but with an extra parameter D.
+	(charclass_index): Reimplement in terms of dfa_charclass_index.
+	(dfahint): Clarify.
+	(dfasuperset): Do not assign to 'dfa' static variable.  Instead,
+	use a local, and use the new dfa_charclass_index function.  This
+	doesn't fix any bugs, but it's clearer.  Initialize a few more
+	members, to simplify dfafree.  Copy the charclasses with
+	just one memcpy call.  Don't assign nonnull to D->superset until
+	it's known to be valid; that's simpler.
+	(dfafree, dfaalloc): Simplify based on dfasuperset initializations.
+	* src/dfa.h (dfahint): Add comment.
+	* src/dfasearch.c (EGexecute): Simplify use of memchr.
+	Simplify by using memrchr.  Fix typo that could cause a buffer
+	read overrun.
+
+2014-04-06  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: optimization with the superset of DFA
+	The superset of a DFA is like the DFA, except that for speed
+	ANYCHAR, MBCSET and BACKREF are replaced by (CSET full bits) STAR,
+	and mb_cur_max is 1.  For example, for 'a\(b\)c\1':
+	  original: a b CAT c CAT BACKREF CAT
+	  superset: a b CAT c CAT CSET STAR CAT  (The CSET has all bits set.)
+	If a string matches a DFA, it matches the DFA's superset.
+	Using the superset to filter can dramatically improve performance,
+	over 200x in some cases.  See <http://bugs.gnu.org/16966>.
+	* src/dfa.c (struct dfa): New member 'superset'.
+	(dfahint, dfasuperset): New functions.
+	(dfacomp): Create and analyze the superset.
+	(dfafree): Free only non-NULL items.
+	(dfaalloc): Initialize superset member.
+	(dfaoptimize): If succeed in optimization for UTF-8 locale, don't use
+	the superset.
+	* src/dfa.h (dfahint): New decl.
+	* src/dfasearch.c (EGexecute): Use dfahint.
+
+2014-04-06  Jim Meyering  <meyering@fb.com>
+
+	build: avoid OS X 10.8.5 build failure due to lack of static_assert
+	* bootstrap.conf (gnulib_modules): Add assert-h, to accommodate the
+	new use of static_assert on systems lacking support for that construct.
+	Without this change, compilation of dfa.c failed on OS X 10.8.5 with
+	gcc-4.9.0 20140324.  We should be using gnulib's assert-h module,
+	regardless, for its nominal improved portability, since grep includes
+	assert.h and uses assert.
+
+2014-04-05  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: fix performance bug with regex in line-by-line mode
+	* src/dfasearch.c (EGexecute): Match line-by-line with regex.
+
+2014-04-05  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: minor improvements to previous patch
+	* src/dfa.c (MAX): New macro.
+	(match_anychar, match_mb_charset, transit_state_consume_1char):
+	Use it to simplify assignments.
+	(SKIP_REMAINS_MB_IF_INITIAL_STATE): Prefer != 0 for unsigned.
+	(free_mbdata): Omit an unnecessary 'free'.
+
+2014-04-05  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: reuse multibyte DFA buffers in non-UTF8 locales
+	* src/dfa.c (struct dfa): New members 'mblen_buf', 'nmblen_buf',
+	'inputwcs', 'ninputwcs', 'mb_follows' and 'mb_match_lens'.
+	(mblen_buf, inputwcs): Remove static vars.
+	(SKIP_REMAINS_MB_IF_INITIAL_STATE, match_anychar, match_mb_charset)
+	(transit_state_consume_1char, transit_state, prepare_wc_buf):
+	Use new members instead of global variables.
+	(check_matching_with_multibyte_ops): Use new members
+	instead of new allocation.
+	(dfaexec): Initialize new members.
+	(free_mbdata): Free new members.
+
+2014-04-05  Paul Eggert  <eggert@penguin.cs.ucla.edu>
+
+	grep: simplify dfa.c by having it not include mbsupport.h directly
+	* src/mbsupport.h: Remove.
+	* src/Makefile.am (noinst_HEADERS): Remove mbsupport.h.
+	* src/dfa.c, src/grep.c, src/search.h: Don't include mbsupport.h.
+	* src/dfa.c: Include wchar.h and wctype.h unconditionally, as
+	this simplifies the use of dfa.c in grep, and it does no harm
+	in gawk.
+	(setlocale, static_assert): Remove gawk-specific hacks, as
+	gawk now does these itself.
+	(struct dfa, dfambcache, mbs_to_wchar)
+	(is_valid_unibyte_character, setbit_wc, using_utf8, FETCH_WC)
+	(addtok_wc, add_utf8_anychar, atom, state_index, epsclosure)
+	(dfaanalyze, dfastate, prepare_wc_buf, dfaoptimize, dfafree, dfamust):
+	* src/dfasearch.c (EGexecute):
+	* src/grep.c (main):
+	* src/searchutils.c (mbtoupper):
+	Assume MBS_SUPPORT.
+
+2014-04-01  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: avoid re-building a state built previously
+	* src/dfa.c (dfaexec): Avoid to re-build a state built previously.
+
+2014-03-28  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: improve port to freestanding DJGPP
+	Suggested by Aharon Robbins (Bug#17056).
+	* src/dfa.c (setlocale) [!LC_ALL]: Return NULL, not "C",
+	reverting part of a recent change.
+	(using_simple_locale): Return true if setlocale returns null.
+
+2014-03-28  Jim Meyering  <meyering@fb.com>
+
+	tests: placate "make syntax-check" re compare arg ordering
+	* tests/euc-mb: Reverse order of arguments to compare.
+	Be consistent in ordering compare arguments: expected followed
+	by actual.
+
+2014-03-28  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: avoid an indirection and port wint_t usage
+	* src/dfa.c (struct dfa): Put mbrtowc_cache directly into struct dfa
+	rather than having a pointer; this saves a malloc and an indirection.
+	All uses changed.
+	(dfambcache): Port to hosts where wint_t * can't be cast to wchar_t *.
+
+2014-03-28  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: take mbrtowc_cache into new member of struct dfa
+	When struct dfa more than one are used at the same time, mbrtowc cache
+	may be conflict.  So, take mbrtowc_cache into new member of struct dfa,
+	and define each mbrtowc cache for them.
+
+	* src/dfa.c (struct dfa): New member `mbrtowc_cache'.
+	(dfambcache): Rename from build_mbrtowc_cache.  Add dependency on struct dfa.
+	(mbs_to_wchar): Add dependency on struct dfa.
+	(FETCH_WC): Use it.
+	(prepare_wc_buf): Use it.  Add dependency on struct dfa.
+	(dfacomp): Call it.
+	(dfafree): Release it.
+
+2014-03-28  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: cache results of mbrtowc for speed
+	Idea suggested by Norihiro Tanaka in Bug#16842.
+	* src/dfa.c (mbrtowc_cache): New static var.
+	(build_mbrtowc_cache, mbs_to_wchar): New functions.
+	(FETCH_WC) [MBS_SUPPORT]: Speed up by using mbs_to_wchar
+	instead of mbrtowc and wctob.
+	(FETCH_WC) [!MBS_SUPPORT]: Rewrite in terms of old FETCH macro.
+	(FETCH): Remove; no longer used.
+	(lex): Simplify by avoiding the need for FETCH.
+	(prepare_wc_buf) [MBS_SUPPORT]: Speed up by using mbs_to_wchar.
+	Simplify the loop.
+	(dfacomp): Initialize the cache.
+
+2014-03-27  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: perform the kwset-helping DFA match in narrower range
+	When kwsexec gives us the offset of a potential match, we compute
+	line begin/end and then run the DFA matcher to see if there really
+	is a match on that line.  When the beginning of the line, BEG, is
+	not on a multibyte character boundary, advance BEG until it on such
+	a boundary, before running the DFA search.
+	* src/dfasearch.c (EGexecute): As above.  Add a comment.
+	* tests/euc-mb: Add a test case that exercises this code.
+	This addresses http://debbugs.gnu.org/17095.
+
+2014-03-26  Jim Meyering  <meyering@fb.com>
+
+	maint: fix "make dist"
+	* src/Makefile.am (egrep fgrep): Specify egrep.sh via
+	$(srcdir)/egrep.sh, so non-srcdir builds work once again.
+
+2014-03-26  Paul Eggert  <eggert@penguin.cs.ucla.edu>
+
+	dfa: improve port to freestanding DJGPP
+	* src/dfa.c (setlocale) [!LC_ALL]: Return "C", not NULL (Bug#17056).
+	(using_simple_locale): Store setlocale result in a ptr-to-const.
+
+	egrep, fgrep: improve diagnostics from shell scripts
+	This should fix Bug#17098.
+	* src/Makefile.am (EXTRA_DIST): Add egrep.sh.
+	(egrep fgrep): Depend on egrep.sh and Makefile.
+	Build from new file egrep.sh, as this makes the build process
+	easier to follow.  Arrange for $0 to look nicer in subgrep.
+	* src/egrep.sh: New file.
+
+2014-03-23  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: avoid undefined behavior
+	* src/dfa.c (FETCH_WC, addtok_wc): Don't rely on undefined behavior
+	when converting an out-of-range value to 'int'.
+	(FETCH_WC, prepare_wc_buf): Don't rely on conversion state after
+	mbrtowc returns a special value, as it's undefined for (size_t) -1.
+	(prepare_wc_buf): Simplify test for valid character.
+
+	grep: fix and simplify grep -iF optimization
+	* src/grep.c (check_any_alphabets): Remove.
+	(fgrep_to_grep_pattern): Fix problems when mbrtowc returns -1 or -2.
+	Simplify a bit.
+	(main): Don't bother optimizing 'grep -iF PAT' when PAT contains no
+	alphabetics; it's so rare it's not worth the complexity.
+
+2014-03-23  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: optimization for fgrep with changing the macher to grep macher.
+	fgrep macher is only use kwset engine.  However, it's very slow for
+	case-insensitive matching in multibyte locales.
+
+	And so, if the matcher is fgrep and case-insensitive and keys including
+	any alphabets, change it into grep matcher by escape of keys.  OTOH, if
+	keys include no alphabet, turn match_icase flag off.
+
+	I prepare following string to measure the performance.
+
+	    yes $(printf '%078dm' 0)| head -1000000 | tr 0 a > in
+	    A=`printf '\xef\xbc\xa1'`   # FULLWIDTH LATIN CAPITAL LETTER A
+
+	I run three tests with this patch (best-of-5 trials):
+
+	    env LC_ALL=en_US.UTF-8 time -p src/fgrep -i "$A" in
+	        real 8.54       user 7.13       sys 1.16
+
+	Back out that commit (temporarily), recompile, and rerun the experiment:
+
+	    env LC_ALL=en_US.UTF-8 time -p src/fgrep -i "$A" in
+	        real 0.07       user 0.02       sys 0.05
+
+	* src/fgrep.c (Gcompile) New function.
+	* src/main.c (check_any_alphabets) New function.
+	(fgrep_to_grep_pattern) New function.
+	(main) Use them.
+
+2014-03-23  Paul Eggert  <eggert@cs.ucla.edu>
+
+	egrep, fgrep: go back to shell scripts
+	Although egrep's and fgrep's switch from shell scripts to
+	executables may have made sense in 2005, it complicated
+	maintenance and recently has caused subtle performance bugs.
+	Go back to the old way of doing things, as it's simpler and more
+	easily separated from the mainstream implementation.  This should
+	be good enough nowadays, as POSIX has withdrawn egrep/fgrep and
+	portable applications should be using -E/-F anyway.
+	* po/POTFILES.in: Remove src/egrep.c, src/fgrep.c, src/main.c.
+	* src/Makefile.am (bin_PROGRAMS): Remove egrep, fgrep.
+	(bin_SCRIPTS): New macro.
+	(grep_SOURCES): Move searchutils.c, dfa.c, dfasearch.c, kwset.c,
+	kwsearch.c, pcresearch.c here from libgrep_a_SOURCES.
+	(egrep_SOURCES, fgrep_SOURCES, noinst_LIBRARIES, libgrep_a_SOURCES):
+	Remove.
+	(LDADD): Remove libgrep.a.
+	(egrep, fgrep): New rules.
+	(CLEANFILES): New macro.
+	* src/grep.c: Rename from src/main.c.
+	(usage, setmatcher, main):
+	Simplify, since there's now just one executable.
+	(Gcompile, Ecompile, Acompile, GAcompile, PAcompile, matchers):
+	Move here from the (removed) src/grep.c.
+	(compile_fp_t, execute_fp_t, struct matcher, matchers):
+	Move here from src/grep.h, as they no longer need to be public.
+	(struct matcher.name): Avoid one level of indirection/relocation.
+	(do_execute, main): Fix a performance bug when it was compiled
+	as 'fgrep', due to confusion about which matcher was which.
+	(main): Fix a performance bug with -P, likewise.
+	* src/grep.h (before_options, after_options): Remove.
+	* src/egrep.c, src/fgrep.c, src/grep.c: Remove.
+
+	dfa: port to freestanding DJGPP (Bug#17056)
+	* src/dfa.c (setlocale) [!LC_ALL]: Define a dummy.
+
+2014-03-16  Jim Meyering  <meyering@fb.com>
+
+	tests: avoid false-positive failure on some AMD CPUs
+	* tests/mb-non-UTF8-performance: Avoid false-positive failure
+	when run on certain AMD processors.
+
+2014-03-10  Jim Meyering  <meyering@fb.com>
+
+	tests: make a performance-measuring test less system-sensitive
+	Andreas Schwab reported in http://debbugs.gnu.org/16941
+	that this test would timeout and fail on m68k-suse-linux.
+	Rather than testing absolute duration with a limit tuned
+	to today's hardware, compare performance of grep with LC_ALL=C
+	against that same command using LC_ALL=ja_JP.eucJP.
+	* tests/init.cfg (require_hi_res_time_): New function.
+	* tests/mb-non-UTF8-performance: Rewrite to use it:
+	record absolute duration D of the first (normally much faster)
+	command, and set a timeout of 8*D for the command running in
+	an affected locale.
+
+2014-03-09  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: pacify 'make dist'
+	* src/dfa.c (parse_bracket_exp): Reindent with spaces.
+	* src/dfa.h (case_folded_counterparts): Prefix decl with 'extern'.
+	* src/main.c: Don't include assert.h.
+
+2014-03-07  Paul Eggert  <eggert@cs.ucla.edu>
+
+	fgrep: fix case-fold incompatibility with plain 'grep'
+	fgrep converted to lowercase, whereas the regex code converted
+	to uppercase.  The resulting behaviors don't agree in offbeat
+	cases like Greek sigmas and Turkish Is.  Fix this by changing
+	fgrep to agree with the regex code.
+	* src/kwsearch.c (Fcompile, Fexecute):
+	* src/searchutils.c (kwsinit, mbtoupper):
+	Convert to uppercase, not to lowercase, for compatibility with
+	plain 'grep'.
+	* src/search.h, src/searchutils.c (mbtoupper):
+	Rename from mbtolower, since it now converts to uppercase.
+	All uses changed.
+	* tests/case-fold-titlecase: Add tests for this.
+
+	grep: fix case-fold mismatches between DFA and regex
+	The DFA code and the regex code didn't use the same semantics for
+	case-folding.  The regex code says that the data char d matches
+	the pattern char p if uc (d) == uc (p).  POSIX is unclear in this
+	area; the simplest fix for now is to change the DFA code to agree
+	with the regex code.  See <http://bugs.gnu.org/16919>.
+	* src/dfa.c (static_assert): New macro, if not already defined.
+	(setbit_case_fold_c): Assume MB_CUR_MAX is 1 and that case_fold
+	is nonzero; all callers changed.
+	(setbit_case_fold_c, parse_bracket_exp, lex, atom):
+	Case-fold like the regex code does.
+	(lonesome_lower): New constant.
+	(case_folded_counterparts): New function.
+	(parse_bracket_exp): Prefer plain setbit when case-folding is
+	not needed.
+	* src/dfa.h (CASE_FOLDED_BUFSIZE): New constant.
+	(case_folded_counterparts): New function decl.
+	* src/main.c (trivial_case_ignore): Case-fold like the regex code does.
+	(main): Try to improve comment re trivial_case_ignore.
+	* tests/case-fold-titlecase: Add lots more test cases.
+
+2014-03-06  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+	doc: do not overpromise --ignore-case's behavior
+	* NEWS: Omit vague statement about titlecase that could be
+	misinterpreted, and is more trouble than it's worth.
+	* doc/grep.texi: Add @documentencoding.  Fix copyright range to
+	use endash not hyphen.
+	(Matching Control): Do not overpromise what --ignore-case will do.
+	Give examples of corner cases where the documentation does not
+	specify behavior.
+
+2014-03-05  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: remove differences from gnulib regex code
+	These don't seem to be needed with GCC 4.8.2, and are making
+	maintenance harder.  If we need to disable warnings with older
+	compilers, we can add pragmas to the gnulib versions.  See
+	<http://bugs.gnu.org/16911#24>.
+	* gl/lib/regcomp.c.diff, gl/lib/regex_internal.c.diff:
+	* gl/lib/regex_internal.h.diff, gl/lib/regexec.c.diff:
+	Remove.
+	* cfg.mk (exclude_file_name_regexp--sc_prohibit_tab_based_indentation):
+	Don't mention gl/* files.
+
+2014-03-03  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fix comment
+	* src/main.c (trivial_case_ignore): Fix comment typo.
+
+2014-03-03  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: avoid to add same character to a bracket expression
+	* src/main.c (trivial_ignore_case): Only when uppercase and/or
+	lowercase is different from original character, add it to new pattern.
+
+2014-03-02  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fix some unlikely bugs in trivial_case_ignore
+	* src/main.c (MBRTOWC, WCRTOMB): Reformat as per usual GNU style.
+	(trivial_case_ignore): Don't overrun buffer in the unusual case
+	when a character has both lowercase and uppercase counterparts.
+	Don't rely on undefined behavior when assigning out-of-range value
+	to an 'int'.  Simplify by avoiding unnecessary buffer copies.
+	Work even with shift encodings, by using mbsinit to
+	disable the optimization if we are not in the initial state
+	when we replace B by [BCD].
+
+2014-03-02  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: revert removal of trivial_case_ignore
+	Revive trivial_case_ignore function in order to be able to use kwset.
+
+	* src/main.c (MBRTOWC, WCRTOMB): New macros.
+	(trivial_case_ignore): New function.
+	(main): Use it.
+
+2014-03-02  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: optimization of bracket expression for non-UTF8 locales
+	* src/dfa.c (addtok): Replace an MBCSET with a CSET even in
+	non-UTF8 locales, and even when it has individual characters.
+
+2014-03-01  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: describe titlecase fix better
+	* NEWS: Document behavior on lowercase text too.
+	Suggested by Eric Blake in <http://bugs.gnu.org/16911#10>.
+	* doc/grep.texi (Matching Control): Specify behavior of -i
+	more precisely.
+
+2014-02-28  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: minor tuning for mb_case_map_apply
+	* src/kwsearch.c (mb_case_map_apply): Avoid unnecessary widening of
+	size_t to intmax_t.  Avoid unnecessary reinitialization of k.
+
+	grep: avoid 'inline' when it doesn't matter
+	These days, compilers generally do just fine without advice from
+	users about 'inline', and there's little need for 'static inline',
+	just as there's little need for 'register'.
+	* src/dfa.c (to_uchar):
+	* src/dosbuf.c (guess_type, undossify_input, dossified_pos):
+	* src/main.c (undossify_input):
+	No longer inline.
+	* src/search.h (mb_case_map_apply): Move from here ...
+	* src/kwsearch.c (mb_case_map_apply): ... to here, and
+	make it no longer 'inline'.
+
+	grep: fix bugs with -i and titlecase
+	* NEWS: Document this.
+	* src/dfa.c (setbit_wc): Simplify.
+	(setbit_c): Remove; no longer used.
+	(setbit_case_fold_c, parse_bracket_exp, atom):
+	Don't mishandle titlecase.  For 'atom', this removes the need for
+	the refactoring of Bug#16729.
+	(lex): Use the slower approach only for letters that have a
+	differing case.
+	* tests/case-fold-titlecase: New file.
+	* tests/Makefile.am (TESTS): Add it.
+
+	grep: remove lint
+	* src/main.c (MBRTOWC, WCRTOMB): Remove no-longer-used macros.
+
+2014-02-28  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: remove trivial_case_ignore
+	* src/main.c (trivial_case_ignore): Remove.
+	(main): Remove its use; this optimization is no longer needed.
+
+	grep: don't match line-by-line for case-insensitive with grep and awk
+	* src/main.c (matcher): Move decl up.
+	(do_execute): With the grep or awk matchers,
+	no need to match line by line.
+
+2014-02-27  Jim Meyering  <meyering@fb.com>
+
+	maint: dfa: pass NULL, not 0, as 2nd arg to setlocale
+	* src/dfa.c (using_simple_locale): Use NULL, not 0.
+
+2014-02-27  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* src/dfa.c (prednames): POSIX allows [[:xdigit:]] to match multibyte chars.
+
+	* src/dfa.c (parse_bracket_exp): Parenthesize.
+
+	grep: fix multiple bugs with bracket expressions
+	* NEWS: Document this.
+	* src/dfa.c (using_simple_locale): New function.
+	(parse_bracket_exp): Handle bracket expressions like [a-[.z.]]
+	correctly.  Don't assume that dfaexec handles expressions like
+	[^a-z] correctly, as they can match multiple characters in some
+	locales.
+	* tests/posix-bracket: New file.
+	* tests/Makefile.am (TESTS): Add it.
+
+2014-02-25  Stephane Chazelas  <stephane.chazelas@gmail.com>
+
+	align grep -Pw with grep -w
+	For the -w option, with -P, we used to look for the pattern surrounded by
+	word boundaries. That's different from what grep -w does and what the
+	documentation describes. Now align with grep -w and the documentation by
+	using PCRE look-behind and look-ahead operators to match the pattern if
+	it is not surrounded by word constituents.
+	* src/pcresearch.c (Pcompile): Use (?<!\w)(?:...)(?!\w) rather than
+	\b(?:...)\b.
+	* NEWS (Bug fixes): Mention it.
+	* tests/pcre-w: New file.
+	* tests/Makefile.am (TESTS): Add it.
+	This complements the fix for http://debbugs.gnu.org/16865
+
+2014-02-24  Stephane Chazelas  <stephane.chazelas@gmail.com>
+
+	grep -P: fix it so backreferences now work with -w and -x
+	To implement -w and -x, we bracket the search term with parentheses.
+	However, that set of parentheses had the default semantics of
+	"capturing", i.e., creating a backreferenceable matched quantity.
+	Instead, use (?:...), to create a non-capturing group.
+	* src/pcresearch.c (Pcompile): Use (?:...) rather than (...).
+	* NEWS (Bug fixes): Mention it.
+	* tests/pcre-wx-backref: New file.
+	* tests/Makefile.am (TESTS): Add it.
+	This addresses http://debbugs.gnu.org/16865
+
+2014-02-20  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.18
+	* NEWS: Record release date.
+
+	tests: test for the non-UTF8 multi-byte performance regression
+	Test for the just-fixed performance regression.
+	With a 100-200x differential, it is reasonable to expect that
+	a very slow system will be able to complete the designated
+	task in a few seconds, while with the bug, even a very fast
+	system would exceed the timeout.
+	* tests/mb-non-UTF8-performance: New file.
+	* tests/Makefile.am (TESTS): Add it.
+	* tests/init.cfg (require_JP_EUC_locale_): New function.
+
+	grep -i: avoid a performance regression in multibyte non-UTF8 locales
+	* src/main.c: Include dfa.h.
+	(trivial_case_ignore): Perform this optimization only for UTF8 locales.
+	This rectifies a 100-200x performance regression in non-UTF8 multi-byte
+	locales like ja_JP.eucJP.  The regression was introduced by the 10x
+	UTF8/grep-i speedup, commit v2.16-4-g97318f5.
+	* NEWS (Bug fixes): Mention it.
+	Reported by Norihiro Tanaka in http://debbugs.gnu.org/16232#50
+
+	maint: give dfa.c's using_utf8 function external scope
+	* src/dfa.c (using_utf8): Remove "static inline".
+	* src/dfa.h (using_utf8): Declare it.
+	* src/searchutils.c (is_mb_middle): Use using_utf8 rather than
+	rolling our own.
+
+2014-02-20  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: test [^^-^] in unibyte locales
+	This is a bug in the current dfa.c, which was reintroduced by the
+	recent reversion from RRI.
+	* tests/unibyte-negated-circumflex: New file.
+	* tests/Makefile.am (TESTS): Add it.
+	* tests/init.cfg (require_unibyte_locale): New function.
+
+	grep: fix bug with patterns like [^^-~] in unibyte locales
+	* NEWS: Document this.
+	* src/dfa.c (parse_bracket_exp): Escape patterns like [^^-~], or
+	Awk patterns like [\^-\]], so that they are not misinterpreted by
+	the system regex library.  Check for system regex failure due to
+	memory exhaustion.
+
+2014-02-17  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.17
+	* NEWS: Record release date.
+
+2014-02-17  Paolo Bonzini  <bonzini@gnu.org>
+
+	revert "grep: DFA now uses rational ranges in unibyte locales"
+	The correct course of action for grep is to defer range interpretation
+	to regex, because otherwise you can get mismatches between regexes with
+	backreferences and those without.
+
+	For example, [A-Z]. will use RRI but ([A-Z])\1 won't, with the confusing
+	result that the first regex won't match a superset of the language
+	described by the second regex.
+
+	The source of the confusion is that, even though grep's dfa.c was changed
+	to use range checking instead of strcoll, that code is only invoked if
+	dfaexec is called with backref = NULL, and that never happens for grep!
+
+	In the end, all that's needed for RRI is compiling --with-included-regex,
+	and in that case the patch is almost a no-op.  Almost, because there
+	are corner cases that aren't handled correctly (e.g. [a-[.e.]], or
+	regular expressions that include a NUL character), but this can be
+	handled separately.
+
+	* NEWS: Revert paragraph introduced by commit v2.16-7-g1078b64.
+	* src/dfa.c (parse_bracket_exp): Revert back to regcomp/regexec.
+
+2014-02-16  Mike Frysinger  <vapier@gentoo.org>
+
+	maint: ignore configure.lineno
+	* .gitignore: Add configure.lineno.
+
+2014-02-11  Benno Schulenberg  <bensberg@justemail.net>
+
+	help: remove surplus newline
+	* src/main.c (usage): Remove inconsistent \n introduced by previous
+	patch.
+
+2014-02-10  Benno Schulenberg  <bensberg@justemail.net>
+
+	help: fix a line ending, and use the same word for similar things
+	* src/main.c (usage): Change a stray 'n' to a newline, and use
+	the word "display" for showing version info as for help text.
+
+2014-02-09  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	speed up mb-boundary-detection after each preliminary match
+	After each kwsexec or dfaexec match, we must determine whether
+	the tentative match falls in the middle of a multi-byte character.
+	That is what our is_mb_middle function does, but it was expensive,
+	even when most input consisted of single-byte characters.  The main
+	cost was for each call to mbrlen.  This change constructs and uses
+	a cache of the lengths returned by mbrlen for unibyte values.
+	The largest speed-up (3x to 7x, CPU-dependent) is when most
+	lines contain a match, yet few are printed, e.g., when using
+	grep -v common-pattern ... to filter out all but a few lines.
+
+	* src/search.h (build_mbclen_cache): Declare it.
+	* src/main.c: Include "search.h".
+	[MBS_SUPPORT] (main): Call build_mbclen_cache in a multibyte locale.
+	* src/searchutils.c [HAVE_LANGINFO_CODESET]: Include <langinfo.h>.
+	(mbclen_cache): New global.
+	(build_mbclen_cache): New function.
+	(is_mb_middle) [HAVE_LANGINFO_CODESET]: Use it.
+	* NEWS (Improvements): Mention it.
+
+2014-02-01  Jim Meyering  <meyering@fb.com>
+
+	maint: use to_uchar function rather than explicit casts
+	* src/system.h (to_uchar): Define function.
+	* src/kwsearch.c (Fexecute): Use to_uchar twice in place of casts.
+	* src/dfasearch.c (EGexecute): Likewise.
+	* src/main.c (prepend_args): Likewise.
+	* src/kwset.c (U): Define in terms of to_uchar.
+	* src/dfa.c (match_mb_charset): Use to_uchar, not an explicit cast.
+
+2014-01-27  Jim Meyering  <meyering@fb.com>
+
+	maint: remove vestiges of support for long-disabled --mmap option
+	This option was disabled in March of 2010, and began to elicit a
+	warning in January of 2012.  Its time has come.
+	* doc/grep.in.1: Remove mention.
+	* doc/grep.texi: Likewise.
+	* src/main.c (GROUP_SEPARATOR_OPTION, usage, MMAP_OPTION)
+	(long_options, main): Remove all traces.
+	* tests/Makefile.am (check_PROGRAMS): Remove mention of ignore-mmap.
+	* tests/ignore-mmap: Remove file.
+	* NEWS (Maintenance): Mention it.
+
+2014-01-26  Jim Meyering  <meyering@fb.com>
+
+	maint: move two local variable declarations
+	* src/dfasearch.c (kwsmusts): Move one declaration down to the point
+	of definition.  Move another into the sole scope where it is used.
+
+2014-01-26  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfasearch: skip kwset optimization when multi-byte+case-insensitive
+	Now that DFA searching works with multi-byte locales, the only remaining
+	reason to case-convert the searched input is the kwset optimization.
+	But multi-byte case-conversion is so expensive that it's not
+	worthwhile even to attempt that optimization.
+
+	* src/dfasearch.c (kwsmusts): Skip this function in ignore-case mode
+	when the locale is multi-byte.
+	(EGexecute): Now that this code need not handle multi-byte case-ignoring
+	matches, remove the expensive copy/case-conversion code.
+	With no case-converted buffer, there is no longer any need to call
+	mb_case_map_apply, so remove it and associated code.
+	(kwsincr_case): Remove function.  Now, every use of this function
+	is equivalent to a use of kwsincr.  Replace all uses.
+	* tests/turkish-eyes: Test all of -E, -F and -G.
+
+2014-01-25  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa: remove GREP-ifdef'd code in favor of code used by gawk
+	For many years, gawk and grep have used different #ifdef'd bits of
+	code relating to how the DFA matcher matches multibyte characters.
+	Remove the GREP-specific code in favor of the code gawk uses.  This
+	permits us to avoid still more cases in which grep must resort to
+	the expensive process of copying/case-converting each input line
+	before matching against a case-converted regexp.
+	* src/dfa.c (parse_bracket_exp, atom): As above.
+
+2014-01-25  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest
+
+2014-01-17  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: DFA now uses rational ranges in unibyte locales
+	Problem reported by Aharon Robbins in <http://bugs.gnu.org/16481>.
+	* NEWS:
+	* doc/grep.texi (Environment Variables)
+	(Character Classes and Bracket Expressions):
+	Document this.
+	* src/dfa.c (parse_bracket_exp): Treat unibyte locales like multibyte.
+
+2014-01-17  Aharon Robbins  <arnold@skeeve.com>
+
+	grep: add undocumented '-X gawk' and '-X posixawk' options
+	See <http://bugs.gnu.org/16481>.
+	* src/grep.c (GAcompile, PAcompile): New functions.
+	(const): Use them.
+
+2014-01-10  Pádraig Brady  <P@draigBrady.com>
+
+	tests: remove superfluous uses of printf
+	* tests/turkish-eyes: Remove unnecessary uses of printf.
+
+2014-01-09  Jim Meyering  <meyering@fb.com>
+
+	grep: make --ignore-case (-i) faster (sometimes 10x) in multibyte locales
+	These days, nearly everyone uses a multibyte locale, and grep is often
+	used with the --ignore-case (-i) option, but that option imposes a very
+	high cost in order to handle some unusual cases in just a few multibyte
+	locales.  This change gets most of the performance of using LC_ALL=C
+	without eliminating the ability to search for multibyte strings.
+
+	With the following example, I see an 11x speed-up with a 2.3GHz i7:
+	Generate a 10M-line file, with each line consisting of 40 'j's:
+
+	    yes jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj | head -10000000 > k
+
+	Time searching it for the simple/noexistent string "foobar",
+	first with this patch (best-of-5 trials):
+
+	    LC_ALL=en_US.UTF-8 env time src/grep -i foobar k
+	        1.10 real         1.03 user         0.07 sys
+
+	Back out that commit (temporarily), recompile, and rerun the experiment:
+
+	    git log -1 -p|patch -R -p1; make
+	    LC_ALL=en_US.UTF-8 env time src/grep -i foobar k
+	        12.50 real        12.41 user         0.08 sys
+
+	The trick is to realize that for some search strings, it is easy
+	to convert to an equivalent one that is handled much more efficiently.
+	E.g., convert this command:
+
+	  grep -i foobar k
+
+	to this:
+
+	  grep '[fF][oO][oO][bB][aA][rR]' k
+
+	That allows the matcher to search in buffer mode, rather than having to
+	extract/case-convert/search each line separately.  Currently, we perform
+	this conversion only when search strings contain neither '\' nor '['.
+	See the comments for more detail.
+
+	* src/main.c (trivial_case_ignore): New function.
+	(main): When possible, transform the regexp so we can drop the -i.
+	* tests/turkish-eyes: New file.
+	* tests/Makefile.am (TESTS): Use it.
+	* NEWS (Improvements): Mention it.
+
+2014-01-07  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: port Solaris 10 /bin/sh patch back to GNU/Linux
+	Problem reported by Jim Meyering.
+	* tests/bre, tests/ere, tests/spencer1-locale:
+	Prefer re_shell, not re_shell_.
+	* tests/init.sh (re_shell): New var, which is exported instead of
+	re_shell_.
+
+	Port to Solaris 10 /bin/sh.
+	Problem reported by Dagobert Michelsen in <http://bugs.gnu.org/16380>.
+	* tests/bre, tests/ere, tests/spencer1-locale:
+	Prefer re_shell_ to SHELL, if re_shell_ is set.
+	* tests/init.sh (re_shell_): Export if it's used.
+
+2014-01-01  Jim Meyering  <meyering@fb.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.16
+	* NEWS: Record release date.
+
+	gnulib: update to latest, for maint.mk fix
+
+	maint: update copyright dates for 2014
+	Do that by running "make update-copyright".
+
+	gnulib: update to latest
+
+2013-12-31  Jim Meyering  <meyering@fb.com>
+
+	pcre: use PCRE_NO_UTF8_CHECK properly
+	In order to obtain the behavior we want, i.e., to disable
+	error-on-invalid-UTF-in-input, apply this PCRE option in
+	pcre_exec, not when compiling.
+	* src/pcresearch.c (Pexecute): Use PCRE_NO_UTF8_CHECK here, ...
+	(Pcompile): ...rather than here.
+	* tests/pcre-invalid-utf8-input: Adjust test case to test for this.
+
+2013-12-26  Jim Meyering  <meyering@fb.com>
+
+	maint: fix inconsistent spacing in expression
+	* src/main.c (prline): Fix inconsistent spacing in expression:
+	s/  / /.
+
+2013-12-26  behoffski  <behoffski@grouse.com.au>
+
+	maint: fix a garbled comment
+	* src/dfa.c (XNMALLOC, etc.): Fix garbled comment wording.
+
+2013-12-23  Jim Meyering  <meyering@fb.com>
+
+	maint: fix/improve a comment
+	* src/main.c (prline): Replace untrue FIXME comment with one
+	telling how the hard-to-reach code can be exercised.
+
+2013-12-21  Santiago Ruano Rincón  <santiago@debian.org>
+
+	pcre: tell grep -P to relax its stance on invalid multibyte chars
+	Do not exit-2 for invalid UTF-8 characters.  Just prior to this
+	change, this command would match no lines and fail like this:
+	  $ printf 'j\x82\nj\n'|LC_ALL=en_US.UTF-8 grep -P j|cat -A; echo $?
+	  grep: invalid UTF-8 byte sequence in input
+	  2
+	After this change, the same command matches both lines, and succeeds:
+	  jM-^B$
+	  j$
+	  0
+	* src/pcresearch.c (Pcompile): Use PCRE_NO_UTF8_CHECK, too, and
+	add a comment.
+	* tests/pcre-utf8: Add a test and a comment.
+	This change did not work with Debian unstable pcre-8.31-2
+	or with some 8.33 and 8.34-based versions, but does work with
+	Fedora 20's 8.33 and with a built-from-latest source library.
+	Based on a patch by Santiago Ruano Rincón.
+	See http://bugs.gnu.org/15758/
+
+2013-12-21  Jim Meyering  <meyering@fb.com>
+
+	tests: avoid FP failure due to exhausted memory
+	* tests/long-line-vs-2GiB-read: Don't declare the test "failed"
+	when running out of memory.  In that case, skip it.
+
+2013-12-18  Jim Meyering  <meyering@fb.com>
+
+	maint: add comments and split some long lines
+	* src/main.c (do_execute): Add a comment.
+	Split some lines longer than 80 bytes.
+
+	pcre: avoid a nominal leak
+	* src/pcresearch.c (Pcompile)[HAVE_LIBPCRE && !PCRE_STUDY_JIT_COMPILE]:
+	We would leak "re" if built with HAVE_LIBPCRE but without
+	PCRE_STUDY_JIT_COMPILE.  Move the free out one level.
+
+	maint: indent cpp directives to reflect nesting
+	* src/pcresearch.c: Insert spaces after a few "#", to indent
+	cpp directives to reflect their nesting.
+
+	grep: handle lines longer than INT_MAX on more systems
+	When trying to exercize some long-line-handling code, I ran these
+	commands:
+	  $ dd bs=1 seek=2G of=big < /dev/null; grep -l x big; echo $?
+	  grep: big: Invalid argument
+	  2
+	grep should not have issued that diagnostic, and it should
+	have exited with status 1, not 2.  What happened?
+	grep read the 2GiB of NULs, doubled its buffer size,
+	copied the 2GiB into the new 4GiB buffer, and proceeded
+	to call "read" with a byte-count argument of 2^32.
+	On at least Darwin 12.5.0, that makes read fail with EINVAL.
+	The solution is to use gnulib's safe_read wrapper.
+	* src/main.c: Include "safe-read.h"
+	(fillbuf): Use safe_read, rather than bare read.  The latter
+	cannot handle a read size of 2^32 on some systems.
+	* bootstrap.conf (gnulib_modules): Add safe-read.
+	* tests/long-line-vs-2GiB-read: New file.
+	* tests/Makefile.am (TESTS): Add it.
+	* NEWS (Bug fixes): Mention it.
+
+2013-11-25  Jim Meyering  <meyering@fb.com>
+
+	tests: port to non-GNU sed
+	* tests/multibyte-white-space (utf8_space_characters): The generation
+	of test inputs relied on GNU sed's interpretation of \<, but that is
+	not portable, and caused spurious test failures.  Adjust the sed regexp
+	to work on all versions.
+	Reported by Karl Dubost in http://bugs.gnu.org/15953.
+
+2013-11-22  Jim Meyering  <meyering@fb.com>
+
+	maint: minor cleanup: xmalloc+strcpy -> xmemdup
+	* src/main.c (main): Replace an xmalloc+strcpy combination
+	with an equivalent use of xmemdup.
+
+2013-11-21  Jim Meyering  <meyering@fb.com>
+	    Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: avoid undefined behavior of "1 << 31"
+	* src/dfa.c (charclass): Change type from "int" to "unsigned int".
+	(tstbit): Rather than shifting "1" left to form a mask, shift the
+	LHS bits the right and use "1" as the mask.  Also, return bool, rather
+	than "int".
+	(setbit, clrbit, dfastate): Don't shift "1" (aka (int)1) left by 31 bits.
+	Instead, use "1U" as the operand, to avoid undefined behavior.
+	Spotted by gcc's new -fsanitize=undefined.
+
+2013-11-02  Jim Meyering  <meyering@fb.com>
+
+	grep: fix regression with -P vs. invalid UTF-8 input
+	* src/pcresearch.c (Pexecute): Don't abort upon unexpected
+	PCRE-specific error code.  Explicitly handle PCRE_ERROR_BADUTF8,
+	and change the default to print a diagnostic including the unhandled
+	integer PCRE error code and exit with status 2.
+	* tests/pcre-invalid-utf8-input: New file.
+	* tests/Makefile.am (TESTS): Add it.
+	* NEWS (Bug fixes): Mention it.
+	* THANKS: Update.
+	Reported by Dave Reisner in http://bugs.gnu.org/15758.
+
+	grep: fix regression involving \s and \S
+	Commit v2.14-40-g01ec90b made \s and \S work with multi-byte
+	characters, but it made it so any use like \s*, \s+, \s?, \s{3}
+	would malfunction in a multi-byte locale.
+	* src/dfa.c (lex): Also reset laststart.
+	* tests/backslash-s-and-repetition-operators: New file.
+	* tests/Makefile.am (TESTS): Add it.
+	* NEWS (Bug fixes): Mention it.
+	* THANKS: Update.
+	Reported by Mirraz Mirraz in http://bugs.gnu.org/15773.
+
+2013-11-01  Jim Meyering  <meyering@fb.com>
+
+	maint: NEWS: document a release-related bug fix
+	* NEWS (Bug fixes): Add an entry for a fix pulled from gnulib.
+
+2013-10-26  Jim Meyering  <meyering@fb.com>
+
+	build: update gnulib submodule to latest
+	This pulls in a gnulib fix for maint.mk that ensures the procedure
+	described in README-release actually does what we want.  Before this
+	change, that procedure resulted in a grep-2.15 tarball that would
+	lead to a grep binary whose --version- reported version number was
+	2.14.51... rather than the expected 2.15.
+
+	maint: avoid automake deprecation warning re ACLOCAL_AMFLAGS
+	* Makefile.am (ACLOCAL_AMFLAGS): Don't use this deprecated variable.
+	* configure.ac (AC_CONFIG_MACRO_DIRS): Use this instead.
+	(AUTOMAKE_OPTIONS): Require automake-1.12.
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.15
+	* NEWS: Record release date.
+
+2013-10-25  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: port to AIX
+	Problem reported by Pavel Kharitonov in <http://bugs.gnu.org/15690#68>.
+	* src/Makefile.am (LDADD): Add $(LIBTHREAD).
+
+	build: avoid duplicate -funit-at-a-time etc. options
+	* configure.ac (WERROR_CFLAGS): Don't add -fdiagnostics-show-option
+	and -funit-at-a-time, as Gnulib does that for us now, and we're
+	merely piling on duplicats.
+
+2013-10-24  Jim Meyering  <meyering@fb.com>
+
+	tests: port more tests to bourne shells with hex-challenged printf
+	* tests/pcre-utf8: Convert the hex \xHH literals for the euro symbol
+	to octal \OOO.
+	* tests/turkish-I: Likewise for "I with dot".
+	* tests/turkish-I-without-dot: Likewise for another Turkish I: U+0131.
+
+	maint: clean up an ugly 'while' condition
+	* src/main.c (get_nondigit_option): Separate a slightly baroque
+	"while" expression into two separate statements, both inside the loop.
+
+2013-10-23  Jim Meyering  <meyering@fb.com>
+
+	tests: port to bourne shells whose printf doesn't grok hex
+	Use octal escapes, not hex, in printf(1) format strings,
+	and in one case, use $AWK's printf so we can continue
+	to use the table of hex values.
+	* tests/char-class-multibyte: Use printf octal escapes, not hex,
+	for portability to shells like dash and Solaris 10's /bin/sh.
+	* tests/backslash-s-vs-invalid-multitype: Likewise.
+	* tests/surrogate-pair: Likewise.
+	* tests/unibyte-bracket-expr: Count in decimal and convert to octal.
+	* tests/multibyte-white-space (hex_printf): New function.
+	Use it in place of printf so we can retain the table of hex digits
+	without hitting the limitation of some bourne shells.
+	Reported by Paul Eggert in http://bugs.gnu.org/15690#11
+
+2013-10-21  Jim Meyering  <meyering@fb.com>
+
+	gnulib: update to latest
+
+	maint: remove now-unused wcscoll module
+	* bootstrap.conf (gnulib_modules): Remove wcscoll; no longer used.
+
+2013-10-20  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: avoid chatter from Automake 1.14
+	* configure.ac (AM_INIT_AUTOMAKE): Add subdir-objects.
+
+	build: port shell pattern to Solaris 10
+	* configure.ac: Don't use unquoted '^' in a pattern, as this
+	breaks 'configure' on Solaris 10, whose /bin/sh complains about it,
+	which causes 'configure' to exit even before it finds a decent shell.
+	Unix 7th edition shell accepted '^' as an alias for '|'.
+
+	build: port to platforms that predefine _FORTIFY_SOURCE
+	Problem reported by Brenton Hoff (Bug#15663).
+	* configure.ac (_FORTIFY_SOURCE): Don't define if already defined.
+	This is what Emacs does.
+
+2013-10-20  Jim Meyering  <meyering@fb.com>
+
+	build: update gnulib submodule to latest
+
+2013-10-19  Jim Meyering  <meyering@fb.com>
+
+	tests: extend the multibyte-white-space test
+	* tests/multibyte-white-space (utf8_space_characters): Add more
+	single-byte whitespace characters.  Align RHS hex values and
+	make the sed substitution less rigid, to accommodate.
+	Also, ensure that grep '\S' exits with status 1.
+
+	maint: update bootstrap to latest from gnulib
+	* bootstrap: Update from gnulib.
+
+	maint: fix typo in NEWS
+	* NEWS: Fix/improve example commands in most recent entry.
+	The LC_ALL envvar setting goes before grep, not before printf.
+	Don't reference src/ in the second example command, and do specify
+	the locale.
+
+2013-10-09  Jim Meyering  <meyering@fb.com>
+
+	tests: add a test for better coverage of some tricky code
+	* tests/spencer1.tests: Add a non-range bracket expression representing the
+	same regexp, to cover the alternate code path, the one that does not require
+	a regcomp/exec call to interpret the regexp.
+
+2013-10-01  Jim Meyering  <meyering@fb.com>
+
+	tests: ensure neither \s nor \S matches an invalid multibyte character
+	* tests/backslash-S-vs-invalid-multitype: New file.
+	Prompted by the bug report from Roman at
+	http://savannah.gnu.org/bugs/?40009
+	* tests/Makefile.am (TESTS): Add it.
+
+	dfa: fix \s and \S to work for multibyte
+	* src/dfa.c (lex): In multibyte mode, we can't treat \s and \S as we do
+	in single-byte mode.  Map them to [[:space:]] and [^[:space:]] respectively,
+	to make the DFA matcher use the regex-matcher for this term.
+	* tests/multibyte-white-space: New file.  Test for the bug.
+	* tests/Makefile.am (TESTS): Add it.
+	This bug was introduced with the addition of DFA support
+	for \s and \S in commit v2.5.4-112-gf979ca0.
+
+2013-09-30  Jim Meyering  <meyering@fb.com>
+
+	maint: change all references: s/POSIX\.2/POSIX/
+	There is no longer any point in referring to POSIX.N.
+	POSIX is sufficient.
+	* doc/grep.in.1: As above.
+	* src/main.c (main): Likewise.
+	* tests/file: Likewise.
+	* tests/options: Likewise.
+	* ChangeLog: Likewise.
+	* NEWS: Likewise.
+	* cfg.mk: Update, to match changed NEWS.
+	Inspired by Glenn Golden's suggestion in http://bugs.gnu.org/15486
+
+2013-09-22  Jim Meyering  <meyering@fb.com>
+
+	dfa: remove dead disjunct
+	* src/dfa.c (parse_bracket_exp): Remove dead disjunct.
+	At that point, we know MB_CUR_MAX <= 1, so the test,
+	MB_CUR_MAX > 1 && ... is always false.  Remove the disjunct.
+
+	maint: dfa: improve comments and formatting
+	* src/dfa.c (add_utf8_anychar): Correct wording/alignment of a comment.
+	(dfaexec): Add curly braces around multi-line while statement within
+	a "then" block.
+	(ANYCHAR): Clarify comment: "." does not match an invalid UTF8 character.
+	(parse_bracket_exp) Improve comment.
+
+2013-09-08  Jim Meyering  <meyering@fb.com>
+
+	dfa: appease a static analyzer, and save 95 stack bytes
+	* src/dfa.c (MAX_BRACKET_STRING_LEN): Rename from BRACKET_BUFFER_SIZE
+	and decrease from 128 to 32.
+	(parse_bracket_exp): Add one byte more than MAX_BRACKET_STRING_LEN
+	to the length of "str" buffer, to avoid appearance that we may store
+	the trailing NUL beyond the end of buffer.  A string of length 32
+	or greater is rejected by earlier processing, so would never reach
+	this code.  Addresses http://bugs.gnu.org/15307
+
+2013-09-01  Corinna Vinschen  <vinschen@redhat.com>
+
+	fix Cygwin UTF-16 surrogate-pair handling with -i
+	grep -i would segfault on systems using UTF-16-based wchar_t (Cygwin)
+	when converting an input string containing certain 4-byte UTF-8
+	sequences to lower case.  The conversions to wchar_t and back to
+	a UTF-8 multibyte string did not take surrogate pairs into account.
+	* src/searchutils.c (mbtolower) [__CYGWIN__]: Detect and handle
+	surrogate pairs when converting.
+	* NEWS (Bug fixes): Mention it.
+	* tests/surrogate-pair: New test.
+	* tests/Makefile.am (TESTS): Add it.
+	Reported by: Jim Burwell
+
+2013-08-19  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: mention how to use the latest gnulib
+	* README-hacking: Steal some text from coreutils/README-hacking.
+
+2013-08-10  Jim Meyering  <meyering@fb.com>
+
+	build: update gnulib-related code
+	* gnulib: Update submodule to latest.
+	* bootstrap: Update from gnulib.
+	* gl/lib/regex_internal.h.diff: Update to reflect gnulib changes.
+	* bootstrap.conf: Partial sync from coreutils.
+
+2013-08-09  Jim Meyering  <meyering@fb.com>
+
+	tests: simplify and factor newest test
+	* tests/char-class-multibyte2: Simplify file names.
+	Factor out $e_acute, so that the grep argument representation
+	is ascii (though the value is still UTF8).
+
+	doc: NEWS: mention the DFA segfault fix
+	* NEWS (Bug fixes): List the DFA segfault fix.
+
+2013-07-05  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Redo comments and white space to better approach GNU style.
+
+2013-07-05  Paolo Bonzini  <bonzini@gnu.org>
+
+	tests: add testcase for previous change
+	* tests/Makefile.am (TESTS): add char-class-multibyte2.
+	* tests/char-class-multibyte2: New file.
+
+2013-07-05  Mike Haertel  <mike@ducky.net>
+
+	dfa: fix multibyte character in brackets with repetition
+	Let FOO stand for any multibyte (e.g. CJK character) in the regexp.
+	It turns out the following much simpler regexp:
+	        ([^.]*[FOO]){1,2}
+	is sufficient to cause the crash.
+
+	In the first step of its parsing, DFA transforms regexp from human
+	readable syntax into reverse-polish form.  For regexps of the form a{m,n}
+	repeat counts, it simply builds repeated copies of the representation
+	of a, with appropriate inserted CAT and QMARK operators.  For the above
+	example with a regexp of the form a{1,2} it would build:
+
+	        <RPN representation for a>
+	        <RPN representation for a>
+	        QMARK
+	        CAT
+
+	When building repeated copies of RPN representations, additional
+	copies of the RPN representations are made by calling a function
+	copytoks() with arguments consisting of the start position and
+	length of the original copy.
+
+	The problem is that the current code for copytoks() is simply
+	incorrect.  It operates by calling addtok() for each individual
+	token in the source range being copied.  But, in the particular
+	case that the token being added is MBCSET, addtok():
+
+	(1) incorrectly assumes that the character set being added to be added
+	    is the one most (addtok has no argument to indicate which cset is
+	    being added, so it just uses the latest one)
+
+	(2) attempts to do some token sequence expansion into more primitive
+	    operators so things like [FOO] are matched efficiently.
+
+	Both of these assumptions are incorrect in the case that addtok()
+	is being called from copytoks(): (1) is simply not true, and
+	(2) is redundant--the expansion has already been done token sequence
+	being copied, so there is no need to do the expansion again.
+
+	The correct function to add exactly one token, without further expansion,
+	is addtok_mb().  So here is my proposed fix, which is that copytoks()
+	should never call addtok(), but instead directly call addtok_mb()
+	(which is what addtok() eventually calls).
+
+	* src/dfa.c (copytoks): Rewrite using addtok_mb directly.
+
+2013-05-28  Jim Meyering  <meyering@fb.com>
+
+	maint: align backslashes consistently
+	* tests/Makefile.am: Most backslashes were aligned with TABs,
+	so adjust the few that used spaces to conform.
+
+	grep -F: avoid an infinite loop with invalid multi-byte search string
+	* src/kwsearch.c (Fexecute): Avoid an infinite loop when processing
+	a fixed (-F) multibyte search string that is an invalid byte sequence
+	in the current locale and that matches the bytes of the input twice
+	on a line.  Reported by Daisuke GOTO in
+	http://thread.gmane.org/gmane.comp.gnu.grep.bugs/4773
+	* tests/invalid-multibyte-infloop: New test.
+	* tests/Makefile.am (TESTS): Add it.
+	* NEWS (Bug fixes): Mention it.
+
+2013-04-18  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* cfg.mk (old_NEWS_hash): Update.
+
+	doc: document EREs like a{,10}
+	Problem reported by Eric Blake in
+	<http://lists.gnu.org/archive/html/bug-grep/2013-04/msg00005.html>.
+	* NEWS: Document the bug fix.
+	* doc/grep.in.1: Restore documentation for this feature, but mention
+	that it is a GNU extension.
+	* doc/grep.texi (Fundamental Structure): Mention that this feature
+	is a GNU extension.
+
+2013-04-02  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: make dfa.c closer to Gawk's
+	* src/dfa.c: Include <stddef.h>, not <sys/types.h>.
+	stddef.h is smaller and is all we need and is portable nowadays.
+	Include <wchar.h> and <wctype.h> only if MBS_SUPPORT.
+
+2013-01-15  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: make dfa.h standalone
+	Problem reported by Aharon Robbins in
+	<http://lists.gnu.org/archive/html/bug-grep/2013-01/msg00007.html>.
+	* src/dfa.c: Include dfa.h first, so that it's tested standalone.
+	No need to include <regex.h>, since we are in charge of dfa.h and
+	know that it includes <regex.h>.
+	* src/dfa.h: Include <regex.h> and <stddef.h>, so that it's standalone.
+
+2013-01-11  Stefano Lattarini  <stefano.lattarini@gmail.com>
+
+	build: update gettext version to 0.18.2
+	* configure.ac (AM_GNU_GETTEXT_VERSION): Update to 0.18.2.
+	This is necessary to have the gettext-provided m4 files to use
+	AC_PROG_MKDIR_P rather than AM_PROG_MKDIR_P.  This latter macro,
+	planned to disappear in Automake 1.14, has already been removed
+	in the development version of Automake, so that, without this
+	change, grep fails to bootstrap with bleeding-edge Automake.
+
+2013-01-11  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: update gnulib submodule to latest
+
+2013-01-11  Stefano Lattarini  <stefano.lattarini@gmail.com>
+
+	build: remove redundant use of $(INCLUDES)
+	* lib/Makefile.am (INCLUDES): Remove.  Automake automatically adds
+	$(srcdir) and $(top_builddir) to the C preprocessor search path.
+	INCLUDES is deprecated in Automake 1.13 (causing a runtime
+	warning), and will be removed in Automake 1.14.
+
+2013-01-04  Jim Meyering  <jim@meyering.net>
+
+	build: update gnulib submodule to latest
+
+	maint: update all copyright year number ranges
+	Run "make update-copyright".
+
+2012-11-20  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: normalize diagnostics
+	* src/pcresearch.c (Pcompile): Use similar format diagnostics
+	as elsewhere, and translate them.
+
+2012-11-19  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: diagnose read errors from -f dir, porting to Solaris
+	Problem reported by Dennis Clarke for Solaris 10 in
+	<http://lists.gnu.org/archive/html/bug-grep/2012-11/msg00009.html>.
+	* src/main.c (main): For -f F, diagnose any read errors
+	encountered when reading F.
+	* tests/Makefile.am (XFAIL_TESTS): Remove grep-dir.
+	* tests/grep-dir: Don't assume that directories cannot be read
+	via fread, as POSIX allows this and it can happen on Solaris.
+
+2012-11-09  Paolo Bonzini  <bonzini@gnu.org>
+
+	pcre: add PCRE-JIT support for grep
+	* NEWS: Document new feature.
+	* src/pcresearch.c [PCRE_STUDY_JIT_COMPILE] (jit_stack): New.
+	[PCRE_STUDY_JIT_COMPILE] (Pcompile): JIT-compile the regular expression
+	and allocate a stack for it.  Based on a patch from Zoltan Herczeg.
+	* THANKS: Add Zoltan to the list.
+
+2012-10-24  Paul Eggert  <eggert@cs.ucla.edu>
+
+	build: go back to AC_PROG_CC
+	* configure.ac: Go back to using AC_PROG_CC rather than AC_PROG_CC_STDC,
+	as the latter is obsolescent and the Autoconf bug involving the former
+	has been fixed.
+
+2012-10-24  Jim Meyering  <jim@meyering.net>
+
+	build: use AC_PROG_CC_STDC rather than AC_PROG_CC
+	* configure.ac: Use AC_PROG_CC_STDC rather than AC_PROG_CC,
+	to accommodate autoconf-2.69-37+.
+
+	build: update gnulib submodule to latest
+
+2012-10-23  Eric Blake  <eblake@redhat.com>
+
+	build: default to --enable-gcc-warnings in a git tree
+	Anyone building from cloned sources can be assumed to have a new
+	enough environment, such that enabling gcc warnings by default will
+	be useful.  Tarballs still default to no warnings, and the default
+	can still be overridden with --disable-gcc-warnings.
+	* configure.ac (gl_gcc_warnings): Set default based on environment.
+
+2012-10-03  Jim Meyering  <meyering@redhat.com>
+
+	maint: factor out STREQ definition
+	* src/main.c (STREQ): Remove definition.
+	* src/pcresearch.c: (STREQ): Likewise.
+	* src/system.h (STREQ): Define it here instead.
+
+	maint: correct syntax-check failures; adjust NEWS
+	* tests/pcre-utf8: Reverse order of compare arguments.
+	Remove all copyright year numbers except 2012.
+	Use skip_ "diagnostic...", rather than a bare "exit 77".
+	* NEWS: Start with a concise description of the bug.
+	* src/pcresearch.c (STREQ): Define, so that we can...
+	(Pcompile): use STREQ, not strcmp.
+
+2012-10-03  Paolo Bonzini  <bonzini@gnu.org>
+
+	tests: include UTF-8 testcases for grep -P
+	* tests/Makefile.am (TESTS): Add pcre-utf8.
+	* tests/pcre-utf8: New file.
+
+2012-10-03  Petr Pisar  <ppisar@redhat.com>
+
+	pcresearch: set UTF-8 flag correctly for UTF-8 locales
+	Otherwise, Unicode properties (\p{XXX}) do not work with characters
+	outside the 7-bit ASCII character set.
+
+	* src/pcresearch.c (Pcompile): Look for UTF-8 locales and set PCRE_UTF8
+	if one is found.
+
+2012-10-03  Jaroslav Škarvada  <jskarvad@redhat.com>
+
+	doc: fix a formatting bug in grep.1 template
+	* doc/grep.in.1: Insert .TP before the paragraph describing
+	--dereference-recursive (-R).
+
+2012-10-03  Jim Meyering  <meyering@redhat.com>
+
+	maint: placate gcc's -Wjump-misses-init warning
+	* src/kwsearch.c (Fexecute): Replace a "goto" and "return" with
+	a simple return statement, eliminating the label, since that was
+	the sole use.
+	* src/dfasearch.c (EGexecute): Likewise.
+
+2012-09-01  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule to latest
+
+2012-09-01  Eric Blake  <eblake@redhat.com>
+
+	build: work with new glibc when not optimizing
+	Starting with glibc 2.15, the system headers refuse to compile
+	unconditional use of FORTIFY_SOURCE if optimization is disabled
+	but -Werror is in effect.
+
+	* configure.ac (FORTIFY_SOURCE): Make conditional.
+
+2012-08-19  Jim Meyering  <meyering@redhat.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.14
+	* NEWS: Record release date.
+
+2012-08-07  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib and bootstrap
+
+	tests: test for bug with -i and ^$ in a multi-byte locale
+	* tests/empty-line-mb: New file.
+	* tests/Makefile.am (TESTS): Add it.
+
+	grep -i '^$' in a multi-byte locale could report a false match
+	* src/dfasearch.c (EGexecute): Do not match the sentinel "newline"
+	that is appended to each buffer.
+	This bug may sound like a big deal (it certainly surprised me), but
+	realize that only the empty-line-matching regular expression '^$'
+	can trigger it, and then only when you add the unnecessary (and
+	arguably superfluous) -i, *and* run the command in a multi-byte
+	locale.  Using a multi-byte locale for such a regular expression
+	is also pointless, and hurts performance.
+	* NEWS (Bug fixes): Mention it.
+	Reported by Alexander Katassonov <katasso@gmx.de>
+
+2012-08-06  Jim Meyering  <meyering@redhat.com>
+
+	tests: fix a skip diagnostic that mentioned the wrong locale
+	* tests/init.cfg (require_tr_utf8_locale_): s/en_US/tr_TR/
+
+2012-08-02  Jim Meyering  <meyering@redhat.com>
+
+	tests: skip failing test on FS/system that lack SEEK_HOLE support
+	* tests/big-hole: Test for SEEK_HOLE support.  If not available,
+	skip this test.  Hence, this test is now skipped on linux-3.5.0 with
+	ext4 or tmpfs.  The test runs (and passes) with at least btrfs, xfs,
+	or ocfs2.
+	* bootstrap.conf (gnulib_modules): Use the perl module.
+
+2012-07-30  Jim Meyering  <meyering@redhat.com>
+
+	maint: optimize long-line processing
+	* src/main.c (grep): Use memrchr rather than an open-coded loop,
+	reducing the cost of the replaced code by 50% when processing very
+	long lines.  If there were a rawmemrchr function (analogous to glibc's
+	rawmemchr), then the performance improvement would be even greater.
+
+2012-07-27  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: remove stat-size
+	* bootstrap.conf (gnulib_modules): Remove stat-size.
+	* src/main.c: Don't include stat-size.h; no longer needed.
+
+	grep: don't falsely report compressed text files as binary
+	* NEWS: Document this.
+	* src/main.c (file_is_binary): Remove the heuristic based on
+	st_blocks, as it does not work for compressed file systems.
+	On Solaris, it'd be cheap to test whether the file system is known
+	to be uncompressed, which allow the heuristic, but Solaris has
+	SEEK_HOLE so there's little point.
+
+	grep: don't falsely report tiny text files as binary
+	* NEWS: Document this.
+	* src/main.c (file_is_binary): When we are already at apparent
+	EOF, skip the file-size check, as some servers use zero blocks
+	to store binary files.  Reported by Martin Carroll in
+	<http://lists.gnu.org/archive/html/bug-grep/2012-07/msg00016.html>.
+
+2012-07-26  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: document -r/-R in man page
+	* doc/grep.in.1: Document -r vs. -R.
+
+2012-07-21  Jim Meyering  <meyering@redhat.com>
+
+	tests: avoid false positive upon kernel OOM-kill
+	* tests/big-match (skip_diagnostic): Handle case of 139 (SIGKILL)
+	with no diagnostic.
+
+	build: update gnulib and bootstrap
+
+	maint: fix misspellings in old ChangeLog
+	* ChangeLog-2009: Fix typos.
+
+2012-07-19  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: fix ptrdiff/size_t clash
+	Reported by Jaroslav Škarvada in <http://savannah.gnu.org/bugs/?36883>.
+	* src/dfasearch.c (EGexecute): Use size_t, not ptrdiff_t, for lengths.
+	Use regoff_t to store re_match's output, and test it before converting
+	it to size_t.
+
+2012-07-06  Jim Meyering  <meyering@redhat.com>
+
+	maint: correct log typo, to reflect in generated ChangeLog
+	* Makefile.am (gen-ChangeLog): Use --amend, now that we must
+	make our first log correction.
+	* build-aux/git-log-fix: New file.
+
+2012-07-04  Jim Meyering  <meyering@redhat.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.13
+	* NEWS: Record release date.
+
+	build: update gnulib submodule, bootstrap, init.sh
+
+2012-06-17  Jim Meyering  <meyering@redhat.com>
+
+	tests: add another turkish-I-related test case
+	* tests/turkish-I-without-dot: Also exercise the case in which
+	the original string and the lower-case buffer have precisely
+	the same length (22 bytes here), yet internal offsets do differ.
+
+2012-06-16  Jim Meyering  <meyering@redhat.com>
+
+	grep -i: work also when converting to lower-case inflates byte count
+	Commit v2.12-16-g7aa698d addressed the case in which the lower-case
+	representation of an input byte occupies fewer bytes than the original.
+	However, even with commit v2.12-20-g074842d, grep -i would still
+	misbehave when converting a character to lower-case increased its
+	byte count.  The map-manipulation code assumed that the case conversion
+	could only shrink the byte count.  With the consideration that it may
+	also inflate it, the deltas recorded in the map array must be signed,
+	and we must account for the one-to-two-or-more mapping when the
+	original-to-lower-case conversion causes the byte count to increase.
+	* src/searchutils.c (mbtolower): When a lower-case character occupies
+	more than one byte, set its remaining map slots to zero.  Change the
+	type of the map to be signed, and compute the change in character
+	byte count as new_length - old_length.
+	* src/search.h: Include <stdint.h>, for decl of intmax_t.
+	(mb_case_map_apply): Adjust for signed increments:
+	each map entry is now signed.
+	(mb_len_map_t): Define type.  Thanks to Paul Eggert for noticing
+	in review that using a bare "char" as the base type would be wrong on
+	systems for which it is a signed type (as with gcc's -funsigned-char).
+	* src/kwsearch.c (Fcompile, Fexecute): Likewise.
+	* src/dfasearch.c (kwsincr_case, EGexecute): Likewise.
+	* tests/turkish-I-without-dot: New test.  Thanks to Paolo Bonzini
+	for the tip that in the tr_TR.utf8 locale, mapping "I" to lower case
+	increases the character's byte count.
+	* tests/Makefile.am (TESTS): Add it.
+	* tests/init.cfg (require_tr_utf8_locale_): New function.
+	* NEWS (Bug fixes): Expand the existing entry.
+
+2012-06-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: handle -i when chars differ in length but line does not
+	* src/searchutils.c (mbtolower): Return the map back to the caller
+	if any input character's length differs from the corresponding output
+	character's, not merely if the total string length differs.
+	Problem reported by Johannes Meixner in
+	<http://lists.gnu.org/archive/html/bug-grep/2012-06/msg00029.html>.
+
+2012-06-07  Jim Meyering  <meyering@redhat.com>
+
+	tests: extend coverage of dfa.c's match_mb_charset
+	Add a test case to increase test coverage of part of dfa.c (the DFA
+	matcher used by grep and gawk).  While thinking about removing the few
+	remaining uses of strncpy in dfa.c, I found that none of the existing
+	tests covered the 40+ lines of code at the end of match_mb_charset,
+	so constructed this test case to demonstrate that it's not dead code
+	* tests/dfa-coverage: New test, for improved coverage.
+	* tests/Makefile.am (TESTS): Add it.
+
+2012-06-05  Jim Meyering  <meyering@redhat.com>
+
+	build: fix a subtly twisted "make distcheck" failure
+	"make distcheck" would fail when, during a test build,
+	an attempt to overwrite the deliberately-write-protected
+	$(srcdir)/grep.pot file would fail.
+	* bootstrap.conf (bootstrap_epilogue): Don't let the existence of
+	a large sparse file in the build directory induce "make distcheck"
+	failure.  The existence of a large sparse test file named 8T-or-so
+	would make po/Makefile.in.in's use of grep (to search for "GNU grep"
+	as an indication that this is a GNU package) exit 2 without generating
+	any output, which made the first xgettext use --package-name=grep,
+	while that same search for "GNU grep" would succeed when run
+	from a pristine from-tarball build, thus making the second
+	xgettext invocation use --package-name='GNU grep'.
+	That mismatch:
+	-"Project-Id-Version: grep 2.12.18-1080\n"
+	+"Project-Id-Version: GNU grep 2.12.18-1080\n"
+	led to the attempt by Makefile.in.in's grep.pot-update rule to
+	overwrite ../../grep.pot in the read-only po/ source directory.
+
+2012-06-03  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule, bootstrap and init.sh
+	cfg.mk: Exempt dfa.c from the new no-strncpy test, for now.
+
+2012-06-02  Jim Meyering  <meyering@redhat.com>
+
+	grep: fix how -i works with a match containing the Turkish I-with-dot
+	Fix a long-standing problem in the way grep's -i interacts with
+	data whose byte count changes when we convert it to lower case.
+	For example, the UTF-8 Turkish I-with-dot (İ) occupies two bytes,
+	but its lower case analog, i, occupies just one byte.  The code
+	converts both search string and the haystack data to lower case,
+	and then searches for the modified string in the modified buffer.
+	The trouble arose when using a lowercase buffer <offset,length>
+	pair to manipulate the original (longer) buffer.
+
+	The solution is to change mbtolower to return additional information:
+	a malloc'd mapping vector.  With that, the caller maps the lowercase-
+	relative <offset,length> to numbers that refer to the original buffer.
+	This mapping is used only when lengths actually differ, so the cost
+	in general should be small.
+
+	* src/searchutils.c (mbtolower): Add the new map parameter.
+	* src/search.h (mb_case_map_apply): New function.
+	* src/kwsearch.c (Fexecute): Update mbtolower caller, and upon
+	success, apply the new map.
+	* src/dfasearch.c (EGexecute): Likewise.
+	* tests/Makefile.am (XFAIL_TESTS): Remove turkish-I from this list;
+	that test is no longer expected to fail.
+	* NEWS (Bug fixes): Mention it.
+	Reported by Ilya Basin in
+	http://thread.gmane.org/gmane.comp.gnu.grep.bugs/3413 and later
+	by Strahinja Kustudic in http://savannah.gnu.org/bugs/?36567
+
+2012-06-01  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: remove unnecessary "what-if-signal?" code
+	* src/main.c (fillbuf): Don't worry about EINTR when closing --
+	not possible, since we're not catching signals.
+
+2012-05-16  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: avoid nominal integer overflow
+	* src/dfa.c (add_utf8_anychar): Avoid signed integer overflow.
+	Although this works on all platforms we know about, strictly
+	speaking the behavior is undefined, and Sun C 5.8 warns about it.
+
+2012-05-15  Jim Meyering  <meyering@redhat.com>
+
+	maint: avoid nit-picky syntax-check test failure; tweak big-hole test
+	* NEWS: Restore deleted newline in "old" NEWS, to fix a syntax-check
+	test failure.
+	* tests/big-hole: Use awk, rather than a shell loop: saves 3000 lines
+	of verbose shell output in the .log file.
+
+2012-05-15  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: sparse files are now considered binary
+	* NEWS: Document this.
+	* doc/grep.texi (File and Directory Selection): Likewise.
+	* bootstrap.conf (gnulib_modules): Add stat-size.
+	* src/main.c: Include stat-size.h.
+	(usable_st_size): New function, mostly stolen from coreutils.
+	(fillbuf): Use it.
+	(file_is_binary): New function, which looks for holes too.
+	(grep): Use it.
+	* tests/Makefile.am (TESTS): Add big-hole.
+	* tests/big-hole: New file.
+
+2012-05-06  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: quote 'like this' or "like this", not `like this'
+	See <http://lists.gnu.org/archive/html/bug-grep/2012-01/msg00125.html>.
+	* ChangeLog-2009, HACKING, NEWS, README-hacking, cfg.mk, configure.ac:
+	* lib/colorize-w32.c, m4/pcre.m4:
+	* src/Makefile.am, src/dfa.c, src/dosbuf.c, src/main.c:
+	* tests/backref, tests/help-version, tests/tests:
+	In commentary, quote 'like this' or "like this" rather than
+	`like this' or ``like this''.
+	* cfg.mk (old_NEWS_hash): Update due to changed old NEWS.
+	* doc/grep.texi (General Output Control): Quote sample text
+	with @samp, not with `...'.
+	* src/main.c (usage):
+	* tests/help-version: Quote 'like this' rather than `like this'
+	in diagnostics.
+
+	exclude: process exclude and include directives in order
+	Also, change exclude and include directives so that they apply to
+	command-line arguments too.  This restores the pre-2.6 behavior,
+	and fixes a bug reported by Quentin Arce in
+	<http://lists.gnu.org/archive/html/bug-grep/2012-04/msg00056.html>.
+	* NEWS: Document this.
+	* src/main.c (included_patterns): Remove.  All uses removed.
+	(skipped_file): New function.
+	(grepdirent): New arg command_line; all callers changed.  This is
+	needed because non-command-line files can invoke fts_open, and
+	their directory entries need to be distinguished from top-level
+	directory entries.  Move code into the new skipped_file function.
+	(grepdesc): Check whether a command-line argument should be skipped.
+	(main): --include and --exclude options now share excluded_patterns
+	rather than having separate variables included_patterns and
+	excluded_patterns.
+	* tests/include-exclude: Add a test to detect the fixed bug.
+
+	build: update gnulib submodule to latest
+
+2012-04-30  Jim Meyering  <meyering@redhat.com>
+
+	cosmetic: binary operator goes *after* the newline, when split
+	* src/dfa.c (match_mb_charset): Join split lines.
+	(parse_bracket_exp): Move "||" from end of first split line
+	to the beginning of the continued line.
+	* src/dosbuf.c (dossified_pos): Likewise, but for "&&".
+
+	grep: -K is not an option: remove it from list
+	The presence of "K" in the short-option string meant that
+	an erroneous "grep -K ..." would fail with a bare Usage/Try...
+	message, without the usual "invalid option -- 'K'".  With this
+	removal, now grep prints the expected invalid option diagnostic.
+	* src/main.c (short_options): Remove "K".
+	Reported by Петр Досычев in
+	http://thread.gmane.org/gmane.comp.gnu.grep.bugs/4488
+
+2012-04-29  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: small fixes to single-byte range computation
+	* src/dfa.c (parse_bracket_exp): Do not call regexec with an invalid
+	subject.  Move declarations before all statements.
+
+2012-04-27  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: do not use hard-locale
+	* bootstrap.conf (gnulib_modules): Remove hard-locale.
+	* src/dfa.c (hard_LC_COLLATE): Remove.
+	(dfaparse): Do not initialize it.
+	(parse_bracket_exp): Always go through system regex matcher to find
+	single byte characters matching a range.
+
+	drop support for Makefile.boot
+	* Makefile.am: Do not distribute README-boot and Makefile.boot.
+	* NEWS: Mention this change.
+	* README-alpha: Do not mention README-boot and Makefile.boot.
+	* Makefile.boot: Remove.
+	* README-boot: Remove.
+
+2012-04-27  Aharon Robbins  <arnold@skeeve.com>
+
+	dfa: do not use strcoll to match multibyte characters in ranges
+	This does not affect the behavior of grep, which always defers
+	to glibc or gnulib when matching ranges.
+	* src/dfa.c (match_mb_charset): Compare wc directly to the range
+	endpoints.
+
+	dfa: include stdbool.h explicitly
+	* src/dfa.c: Include stdbool.h explicitly
+
+2012-04-23  Jim Meyering  <meyering@redhat.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.12
+	* NEWS: Record release date.
+
+	build: update gnulib submodule to latest
+
+	tests: skip annoyingly long gnulib lock tests
+	* bootstrap.conf (avoided_gnulib_modules): Define.
+	(gnulib_tool_option_extras): Use it.
+
+2012-04-22  Jim Meyering  <meyering@redhat.com>
+
+	tests: avoid spurious quote-mismatch failure on OS/X
+	* tests/in-eq-out-infloop: Simplify expected error output, eliminating
+	expected quotes altogether, thus avoiding spurious OS/X-specific
+	failure due to mismatch of multi-byte vs. single-byte quotes.
+
+2012-04-17  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule to latest
+	* bootstrap: Also update this file.
+
+2012-04-17  Jim Meyering  <meyering@redhat.com>
+
+	grep: fix --devices=ACTION (-D) so stdin is once again exempt
+	An oversight in the 2.11 changes made it so "echo x|grep x" would
+	fail for those who set GREP_OPTIONS=--devices=skip.
+
+	* src/main.c (grepdesc): Ignore skip-related options when reading
+	from standard input.
+	* tests/skip-device: New file.  Test for the above.
+	* tests/Makefile.am (TESTS): Add it.
+	* doc/grep.texi (File and Directory Selection): Clarify this point,
+	documenting the stdin exemption.
+	* NEWS (Bug fixes): Mention it, and add a few "[fixed in ...] notes.
+	Reported by Tino Keitel in http://bugs.debian.org/669084,
+	and forwarded to bug-grep by Aníbal Monsalve Salazar.
+
+2012-04-13  Jim Meyering  <meyering@redhat.com>
+
+	maint: dfa: correct bogus formatting
+	* src/dfa.c (transit_state, dfaexec): s/++ * VAR/++*VAR/
+
+	maint: dfa: add/improve comments
+	* src/dfa.c (transit_state_consume_1char): Note always-ignored
+	return value.
+	Fix typos: s/equivalent class/equivalence class/.
+
+	maint: dfa: avoid unnecessary uses of strcpy/strncpy
+	* src/dfa.c (icatalloc): Use memcpy, not strcpy, given the length.
+	(dfamust): Combine MALLOC+strcpy into cleaner xmemdup.
+	(parse_bracket_exp): Likewise, but replace a use of strncpy.
+
+	grep: handle symlinked directory loops as usual
+	* src/main.c (grepfile): Treat EMLINK just like ELOOP, for
+	systems like FreeBSD 9.0 on which we would otherwise report
+	"Too many links" rather than ignoring that type of failure.
+	E.g., "mkdir d; cd d; ln -s . a; grep -r ^" would print
+	grep: a: Too many links and would exit with status 2.
+	Now, it prints nothing and exits with status 1, as before.
+	Reported by Nelson H. F. Beebe.
+
+	tests: avoid spurious failure of the symlink test
+	* tests/symlink: Ignore spurious "Binary file d matches" on
+	systems for which reading from a directory actually succeeds.
+	Reported by Bruno Haible and Nelson Beebe.
+
+2012-04-09  Jim Meyering  <meyering@redhat.com>
+
+	tests: avoid syntax-check failure: reverse compare arguments
+	* tests/repetition-overflow: Fix reversed compare arguments.
+
+	build: update gnulib submodule to latest
+
+2012-03-18  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: report overflow for ERE a{1000000000}
+	* NEWS: Document this.
+	* src/dfa.c (MIN): New macro.
+	(lex): Lexically analyze the repeat-count operator once, not
+	twice; the double-scan complicated the code and made it harder to
+	understand and fix.  Adjust the repeat-count parsing so that it
+	better matches the behavior of the regex code, in three ways:
+	1. Diagnose too-large repeat counts rather than treating them as
+	literal characters.  2. Use RE_INVALID_INTERVAL_ORD, not
+	RE_NO_BK_BRACES, to decide whether to treat invalid-syntax {...}s
+	as literals.  3. Use the same wording for {...}-related
+	diagnostics that the regex code uses.
+	* tests/bre.tests, tests/ere.tests, tests/repetition-overflow:
+	Adjust to match new behavior, and add a few tests.
+	* cfg.mk (exclude_file_name_regexp--sc_error_message_uppercase):
+	New macro, since the diagnostics start with uppercase letters.
+
+2012-03-14  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: -r no longer follows symlinks; use fts
+	Change -r to follow only command-line symlinks, and by default to
+	read only devices named on the command line.  This is a simple
+	way to get a more-useful behavior when searching random
+	directories; the idea is to use 'find' if you want something fancy.
+	-R acts as before and gets a new alias --dereference-recursive.
+	The code now uses fts internally, so it is more robust and
+	faster with large hierarchies.
+	* .gitignore: Remove lib/savedir.c, lib/savedir.h.
+	* tests/symlink: New file
+	* Makefile.boot (LIB_OBJS_core): Remove isdir.o, savedir.o.
+	Perhaps other changes are needed too, but I'm not sure what
+	this makefile is for.
+	* NEWS: Document changes.
+	* doc/grep.texi (File and Directory Selection): Likewise.
+	* bootstrap.conf (gnulib_modules): Remove dirent, dirname, isdir, open.
+	Add fstatat, fts, openat-safer.
+	* lib/Makefile.am (libgreputils_a_SOURCES): Remove savedir.c, savedir.h.
+	* lib/savedir.c, lib/savedir.h: Remove.
+	* po/POTFILES.in: Add lib/openat-die.c.
+	* src/main.c: Include fcntl-safer.h, fts_.h.  Don't include
+	isdir.h, savedir.h.
+	(struct stats, stats_base): Remove.
+	(long_options, usage, main): Add --dereference-recursive and
+	implement -r vs -R.
+	(filename_prefix_len, fts_options): New static vars.
+	(basic_fts_options, READ_COMMAND_LINE_DEVICES): New constants.
+	(devices): Now defaults to READ_COMMAND_LINE_DEVICES.
+	(reset, grep): Now takes just struct stat rather than file name and
+	struct stats.  All callers changed.
+	(fillbuf): Now takes struct stat reather than struct stats.
+	All callers changed.
+	(grep): Don't worry about recursing too deeply; fts and grepdesc
+	handle this now.
+	(is_device_mode, grepdirent, grepdesc, grep_command_line_args):
+	New functions.
+	(grepfile): New args DIRDESC, FOLLOW, COMMAND_LINE.  Remove struct stats
+	arg.  All callers changed.  Use openat_safer rather than open.
+	Use desc == STDIN_FILENO to tell whether we're reading "-".
+	Don't worry about EINTR when closing -- not possible, since we're
+	not catching signals.
+	* tests/Makefile.am (TESTS): Add symlink.
+	* tests/symlink: New file.
+
+2012-03-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: port big-match to non-GNU dd
+	* tests/big-match: Don't assume GNU dd extension "bs=1M".
+
+	tests: test for bug with -r --exclude-dir and no file operand
+	* tests/include-exclude: Test for the bug and fix.
+
+2012-03-12  Allan McRae  <allan@archlinux.org>
+
+	grep: fix segfault with -r --exclude-dir and no file operand
+	* src/main.c (grepdir): Don't invoke excluded_file_name on NULL.
+	* NEWS (Bug fixes): Mention it.
+
+2012-03-09  Jim Meyering  <meyering@redhat.com>
+
+	tests: exercise two recently-fixed bugs
+	* tests/repetition-overflow: New test for bugs fixed by commit
+	v2.10-82-gcbbc1a4.
+	* tests/Makefile.am (TESTS): Add it.
+
+2012-03-03  Jim Meyering  <meyering@redhat.com>
+
+	maint: use an optimal-for-grep xz compression setting
+	* cfg.mk (XZ_OPT): Use -6e (determined empirically, see comments).
+	This sacrifices a meager 60 bytes of compressed tarball size for a
+	55-MiB decrease in the memory required during decompression.  I.e.,
+	using -9e would shave off only 60 bytes from the tar.xz file, yet
+	would force every decompression process to use 55 MiB more memory.
+
+	build: update gnulib submodule to latest
+
+2012-03-02  Jim Meyering  <meyering@redhat.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.11
+	* NEWS: Record release date.
+
+	tests: avoid failure when using Solaris 10's sed
+	* tests/reversed-range-endpoints: Use a simpler sed expression to
+	sanitize actual output, so it also works with Solaris 10's /bin/sed.
+
+2012-03-01  Jim Meyering  <meyering@redhat.com>
+
+	maint: manually correct formatting in dfa.c's cpp definitions
+	* src/dfa.c: Adjust formatting in cpp definitions.
+
+	maint: indent dfa.c
+	* src/dfa.c: Filter through indent like this:
+	HOME=. indent -Tsize_t -l79 --leave-preprocessor-space \
+	  --dont-format-comments --no-tabs < dfa.c > k && mv k dfa.c
+
+	doc: correct grep.1's descriptions of \w and \W (they omitted "_")
+	* doc/grep.in.1: Fix descriptions of \w and \W.
+	They did not mention "_".
+	* doc/grep.texi (The Backslash Character and Special Expressions):
+	[\w, \W]: List the "_" before the char class, not after: [_[:alnum:]],
+	for readability and to be consistent with the man page.
+
+2012-03-01  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: spelling fixes
+
+	grep: fix integer-overflow issues in main program
+	* NEWS: Document this.
+	* bootstrap.conf (gnulib_modules): Add inttypes, xstrtoimax.
+	Remove xstrtoumax.
+	* src/main.c: Include <inttypes.h>, for INTMAX_MAX, PRIdMAX.
+	(context_length_arg, prtext, grepbuf, grep, grepfile)
+	(get_nondigit_option, main):
+	Use intmax_t, not int, for line counts.
+	(context_length_arg, main): Silently ceiling line counts
+	to maximum value, since there's no practical difference between
+	doing that and using infinite-precision arithmetic.
+	(out_before, out_after, pending): Now intmax_t, not int.
+	(max_count, outleft): Now intmax_t, not off_t.
+	(prepend_args, prepend_default_options, main):
+	Use size_t, not int, for sizes.
+	(prepend_default_options): Check for int and size_t overflow.
+
+	grep: avoid mishandling of long lines
+	* src/pcresearch.c (Pexecute): Do not pass a line longer than
+	INT_MAX to pcre_exec, since its API does not permit that.
+
+	grep: remove no-longer-used setrlimit code
+	This code has been unused and obsolescent ever since the regex
+	code stopped using the stack for large regular expressions.
+	* src/main.c [HAVE_SETRLIMIT]: Do not include <sys/time.h> or
+	or <sys/resource.h>; no longer needed.
+	(set_rlimits): Remove.  All callers changed.
+
+	grep: fix some core dumps with long lines etc.
+	These problems mostly occur because the code attempts to stuff
+	sizes into int or into unsigned int; this doesn't work on most
+	64-bit hosts and the errors can lead to core dumps.
+	* NEWS: Document this.
+	* src/dfa.c (token): Typedef to ptrdiff_t, since the enum's
+	range could be as small as -128 .. 127 on practical hosts.
+	(position.index): Now size_t, not unsigned int.
+	(leaf_set.elems): Now size_t *, not unsigned int *.
+	(dfa_state.hash, struct mb_char_classes.nchars, .nch_classes)
+	(.nranges, .nequivs, .ncoll_elems, struct dfa.cindex, .calloc, .tindex)
+	(.talloc, .depth, .nleaves, .nregexps, .nmultibyte_prop, .nmbcsets):
+	(.mbcsets_alloc): Now size_t, not int.
+	(dfa_state.first_end): Now token, not int.
+	(state_num): New type.
+	(struct mb_char_classes.cset): Now ptrdiff_t, not int.
+	(struct dfa.utf8_anychar_classes): Now token[5], not int[5].
+	(struct dfa.sindex, .salloc, .tralloc): Now state_num, not int.
+	(struct dfa.trans, .realtrans, .fails): Now state_num **, not int **.
+	(struct dfa.newlines): Now state_num *, not int *.
+	(prtok): Don't assume 'token' is no wider than int.
+	(lexleft, parens, depth): Now size_t, not int.
+	(charclass_index, nsubtoks)
+	(parse_bracket_exp, addtok, copytoks, closure, insert, merge, delete)
+	(state_index, epsclosure, state_separate_contexts)
+	(dfaanalyze, dfastate, build_state, realloc_trans_if_necessary)
+	(transit_state_singlebyte, match_anychar, match_mb_charset)
+	(check_matching_with_multibyte_ops, transit_state_consume_1char)
+	(transit_state, dfaexec, free_mbdata, dfaoptimize, dfafree)
+	(freelist, enlist, addlists, inboth, dfamust):
+	Don't assume indexes fit in 'int'.
+	(lex): Avoid overflow in string-to-{hi,lo} conversions.
+	(dfaanalyze): Redo indexing so that it works with size_t values,
+	which cannot go negative.
+	* src/dfa.h (dfaexec): Count argument is now size_t *, not int *.
+	(dfastate): State numbers are now ptrdiff_t, not int.
+	* src/dfasearch.c: Include "intprops.h", for TYPE_MAXIMUM.
+	(kwset_exact_matches): Now size_t, not int.
+	(EGexecute): Don't assume indexes fit in 'int'.
+	Check for overflow before converting a ptrdiff_t to a regoff_t,
+	as regoff_t is narrower than ptrdiff_t in 64-bit glibc (contra POSIX).
+	Check for memory exhaustion in re_search rather than treating
+	it merely as failure to match; use xalloc_die () to report any error.
+	* src/kwset.c (struct trie.accepting): Now size_t, not unsigned int.
+	(struct kwset.words): Now ptrdiff_t, not int.
+	* src/kwset.h (struct kwsmatch.index): Now size_t, not int.
+
+	tests: test for problems with long matches
+	The new test is expensive, so add a category of expensive tests,
+	which are normally not run, and put the new test in this new
+	category.  The idea of having expensive tests is taken from coreutils.
+	* HACKING: Mention RUN_EXPENSIVE_TESTS and similar env vars.
+	* Makefile.am (check-expensive): New rule.
+	* tests/Makefile.am (TESTS): Add big-match.
+	* tests/init.cfg (expensive_): New function, from coreutils.
+	* tests/big-match: New file.
+
+2012-02-29  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: use gnulib _Noreturn rather than __attribute__ ((noreturn))
+	* src/grep.h (__attribute__): Remove.
+	* src/dfa.h (__attribute__): Likewise.
+	(dfaerror): Use noreturn rather than __attribute__ ((noreturn)).
+	* src/main.c (usage): Likewise.
+
+2012-02-26  Jim Meyering  <meyering@redhat.com>
+
+	build: update submodule, bootstrap, tests/init.sh from gnulib
+	* gl/lib/regcomp.c.diff: Adjust.
+	* bootstrap: Update from gnulib.
+	* tests/init.sh: Update from gnulib.
+
+2012-02-26  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: merge calls to SUCCEEDS_IN_CONTEXT
+	* src/dfa.c (state_index): use a single call to SUCCEEDS_IN_CONTEXT.
+
+	dfa: fix a subtle constraint encoding bug
+	* src/dfa.c (SUCCEEDS_IN_CONTEXT, PREV_NEWLINE_DEPENDENT,
+	PREV_LETTER_DEPENDENT): Rewrite to handle all 3*3=9 possible
+	combinations of previous and next character contexts.
+	(MATCHES_NEWLINE_CONTEXT, MATCHES_LETTER_CONTEXT): Remove.
+	(NO_CONSTRAINT, BEGLINE_CONSTRAINT, ENDLINE_CONSTRAINT,
+	BEGWORD_CONSTRAINT, ENDWORD_CONSTRAINT, LIMWORD_CONSTRAINT,
+	NOTLIMWORD_CONSTRAINT): Switch to new encoding.
+	* NEWS: Document resulting bugfix.
+	* tests/spencer1.tests: Add regression test.
+
+	dfa: do not use MATCHES_*_CONTEXT directly
+	* src/dfa.c (dfastate): Use SUCCEEDS_IN_CONTEXT.
+
+	dfa: change meaning of a state context
+	* src/dfa.c (MATCHES_NEWLINE_CONTEXT, MATCHES_LETTER_CONTEXT): New.
+	(state_separate_contexts): Remove second argument.
+	(state_index): Do not mask away CTX_NONE.
+	(dfaanalyze): Adjust call to state_index and state_separate_contexts.
+	(dfastate): Adjust calls to state_index and state_separate_contexts.
+
+2012-02-13  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: fix loop in epipe test
+	* tests/epipe: Don't loop forever if the bug is present.
+	Problem reported by Jaroslav Skarvada.
+
+2012-02-08  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: work portably even if SIGPIPE is ignored
+	* tests/epipe: Don't rely on "trap - PIPE"; that's not portable.
+	Problem reported by Eric Blake in
+	<http://lists.gnu.org/archive/html/bug-grep/2012-02/msg00017.html>.
+	Also, use "ls -al" rather than "echo", in case "echo" is done by a
+	buggy shell that ignores write errors.  And close grep's fd 3, as
+	a sanity check.
+
+2012-02-07  Paul Eggert  <eggert@cs.ucla.edu>
+
+	tests: work even if SIGPIPE is ignored
+	* tests/epipe: Do not infinite-loop if SIGPIPE is already ignored.
+	It could be that the invoker of 'make check' ignores SIGPIPE,
+	for example.
+
+2012-02-05  Jim Meyering  <meyering@redhat.com>
+
+	build: accommodate -Wshadow and -Werror=suggest-attribute=pure
+	* src/dfa.c (state_separate_contexts): Add _GL_ATTRIBUTE_PURE.
+	(dfaexec): Rename parameter, s/newline/allow_nl/, to avoid
+	shadowing the global.
+
+2012-02-05  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: refactor common context computations
+	* src/dfa.c (CTX_ANY, charclass_context, state_separate_contexts): New.
+	(dfaanalyze): Use state_separate_contexts.
+	(dfastate): Use charclass_context and state_separate_contexts.  Rename
+	prev_context to separate_contexts.
+
+	dfa: change newline/letter to a single context value
+	* src/dfa.c (MATCHES_NEWLINE_CONTEXT, MATCHES_LETTER_CONTEXT,
+	SUCCEEDS_IN_CONTEXT, ACCEPTS_IN_CONTEXT): Take a single context value
+	for prev and curr.
+	(struct dfa_state): Replace newline and letter with context.
+	(wchar_context): New.
+	(state_index): Replace newline and letter with context.  Compare
+	context values in the state struct.  Adjust calls to pass contexts.
+	(wants_newline): Replace with wanted_context.  Adjust calls to pass
+	contexts.
+	(dfastate): Replace wants_newline and wants_letter with wanted_context.
+	Adjust calls to pass contexts.
+	(build_state): Adjust calls to pass contexts.
+	(match_anychar, match_mb_charset, transit_state): Use wchar_context.
+	Adjust calls to pass contexts.
+
+2012-02-05  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: introduce contexts for the values in d->success
+	Also initialize all tables in a single place in dfasyntax.
+
+	* src/dfa.c (CTX_NONE, CTX_LETTER, CTX_NEWLINE, char_context): New.
+	(sbit, letters, newline): New.
+	(dfasyntax): Fill them.
+	(dfastate): Remove letters, newline, initialized.
+	(build_state): Use CTX_* constants.
+	(dfaexec): Remove sbit and sbit_init.
+
+2012-02-05  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: remove useless check
+	* src/dfa.c (state_index): There is nothing that is a newline *and*
+	a letter.  Remove redundant call to SUCCEEDS_IN_CONTEXT.
+
+2012-01-22  Jim Meyering  <meyering@redhat.com>
+
+	build: update bootstrap from gnulib and adapt
+	* bootstrap: Update from gnulib.
+	* tests/init.sh: Update from gnulib.
+	* bootstrap.conf (bootstrap_epilogue): Remove now-unnecessary,
+	snippet that edited gnulib-tests/gnulib.mk.
+	(gnulib_tool_option_extras): Add both --symlink and
+	--makefile-name=gnulib.mk.  Remove use of $bt.
+	* lib/Makefile.am: Initialize numerous automake variables so that
+	generated code in gnulib.mk may use += to append to them.
+
+	maint: convert `this' to 'this' quoting style in diagnostics
+	Now that gnulib's quote and quotearg modules use 'this' style,
+	change the few explicit uses in diagnostics to conform.
+	* src/egrep.c (after_options): Use 'this' style of quotes.
+	* src/fgrep.c (after_options): Likewise.
+	* src/grep.c (after_options): Likewise.
+	* src/main.c (usage): Likewise.
+
+	build: update gnulib to latest; adjust quoting in tests
+	* gnulib: Update.
+	* tests/in-eq-out-infloop: Convert expected diagnostics to match
+	new quoting.
+
+2012-01-22  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: document recent diagnostics-related changes
+	* NEWS: Document changes re diagnostics related to GREP_COLORS,
+	directory loops, -s, "write error".
+
+	grep: be quiet about GREP_COLORS syntax
+	* src/main.c (struct color_cap): fct now returns void,
+	since there's no longer need to use what it returns.
+	(color_cap_mt_fct, color_cap_rv_fct, color_cap_ne_fct): Return void.
+	(parse_grep_colors): Do not output diagnostics and then exit with
+	status 0.  Instead, ignore errors in GREP_COLORS.  This is more
+	consistent with programs that (e.g.) ignore errors in termcap entries,
+	and it's more internally-consistent as some GREP_COLORS errors
+	were ignored but not others.
+
+	grep: exit with nonzero status if directory loop
+	* src/main.c (grepdir): Exit with status 2 if a directory loop is
+	found, since the output might not be "right" (i.e., infinite...).
+
+	grep: suppress read errors if -s
+	* src/main.c (reset, grep, grepfile): Do not report an input error
+	if -s is given.
+
+	grep: don't say "write error" over and over
+	Problem reported by Travis Gummels in
+	<https://bugzilla.redhat.com/show_bug.cgi?id=741452>.
+	* src/main.c (write_error_seen): New static var.
+	(clean_up_stdout): New function.
+	(prline): Do not output 'write error' more than once; exit
+	after the first one.  Use the same wording for the diagnostic
+	that close_stdout uses.
+	(main): Clean up with clean_up_stdout, not close_stdout, so that
+	grep doesn't output multiple "write error" diagnostics.
+	* tests/Makefile.am (TESTS): Add epipe.
+	* tests/epipe: New file.
+
+2012-01-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: non-glibc word-constituent unibyte fix
+	* src/dfa.c (is_valid_unibyte_character): Fix typo that caused
+	this to incorrectly return 0 on unibyte non-glibc systems.
+	Problem reported by Aharon Robbins in
+	<http://lists.gnu.org/archive/html/bug-grep/2012-01/msg00084.html>.
+
+2012-01-04  Paul Eggert  <eggert@cs.ucla.edu>
+
+	doc: document empty pattern better
+	* doc/grep.texi (Top, Fundamental Structure, Usage):
+	Explain how grep deals with the empty pattern.
+	Problem spotted by Bernhard Voelker in
+	<http://lists.gnu.org/archive/html/bug-grep/2012-01/msg00050.html>.
+
+	grep: with no args, search "." only if command-line -r
+	* NEWS: Document this.
+	* doc/grep.texi (Environment Variables, grep Programs): Likewise.
+	* src/main.c (usage): Likewise.
+	(main): Implement this.
+	(prepend_default_options): Return a count of prepended options.
+	* tests/r-dot: Test the above.
+
+2012-01-03  Jim Meyering  <meyering@redhat.com>
+
+	tests: adjust test to match code, now that --mmap writes to stderr
+	* tests/ignore-mmap: Separate stdout and stderr; test both.
+
+	deprecate the --mmap option
+	* src/main.c (main): Deprecate the --mmap option: issue a warning
+	when it is used.
+	(usage): Change description.
+	* doc/grep.texi (Other Options): Document the new behavior.
+	* NEWS (Changes in behavior): Mention it.
+
+2012-01-03  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: fix incorrect comment
+	* src/dfa.c (dfastate): Fix comment for newline.
+
+	dfa: fix rebase conflict
+	* src/dfa.c (dfaanalyze): Fix reference to nalloc.
+
+	dfa: automatically resize position_sets
+	* src/dfa.c (insert, copy, merge): Resize arrays here.
+	(dfaanalyze): Do not track number of allocated elements here.
+	(dfastate): Allocate mbps with only one element.
+
+	dfa: change position_set nelem to size_t
+	* src/dfa.c (REALLOC_IF_NECESSARY): Disable assertion, to avoid
+	warnings from -Wtype-limits.
+	(position_set): Change nelem to a size_t.
+
+	dfa: move nalloc to position_set structure
+	* src/dfa.c (position_set): Add alloc.
+	(alloc_position_set): Initialize it.
+	(dfaanalyze): Use it instead of the nalloc array or nelem.
+
+	dfa: remove dead assignment
+	* src/dfa.c (transit_state): transit_state_consume_1char will clear follows,
+	do not do this ourselves.
+
+	dfa: introduce alloc_position_set
+	* src/dfa.c (alloc_position_set): New function, use it throughout.
+
+	dfa: use a more compact data type for grps
+	* src/dfa.c (leaf_set): New.
+	(dfastate): Use the smaller type, leaf_set, for grps.  Its prior type
+	contained an unused constraint field.
+
+	dfa: use MALLOC/REALLOC always
+	src/dfa.c (dfastate, enlist, dfamust): Use MALLOC and REALLOC.
+
+	dfa: remove unnecessary braces
+	* src/dfa.c (dfastate): Remove unnecessary braces.
+
+	dfa: x2nrealloc starting from a NULL pointer works
+	* src/dfa.c (parse_bracket_exp): Do not MALLOC mbcset parts the first time
+	they are encountered.  Initialize chars_al correctly.
+
+2012-01-03  Jim Meyering  <meyering@redhat.com>
+
+	build: avoid build failure with --enable-gcc-warnings and recent gcc
+	* lib/colorize-posix.c: Disable -Wsuggest-attribute=const, to avoid
+	warning about this empty init_colorize function.
+
+2012-01-03  Paolo Bonzini  <bonzini@gnu.org>
+
+	remove lib/ms/
+	* configure.ac: Create lib/colorize.c as a symbolic link.
+	* lib/colorize-posix.c: New name of lib/colorize-impl.c.
+	* lib/colorize-w32.c: New name of lib/ms/colorize-impl.c.
+	* lib/colorize.c: Delete.
+	* lib/Makefile.am (EXTRA_DIST): Adjust.
+	* .gitignore: Adjust.
+	* cfg.mk: Adjust syntax-check exclusions.
+
+	unify colorize.h headers
+	* lib/Makefile.am (EXTRA_DIST): Adjust.
+	* lib/colorize.h: Remove inline functions.
+	* lib/colorize-impl.c: Move them here as functions.
+	* lib/ms/colorize.h: Remove.
+	* src/Makefile.am (DEFAULT_HEADERS): Remove.
+
+2012-01-02  Paolo Bonzini  <bonzini@gnu.org>
+
+	colorize: use isatty module
+	* bootstrap.conf: Add isatty module.
+	* gnulib: Update to latest.
+	* lib/colorize.h: Remove argument from should_colorize.
+	* lib/ms/colorize.h: Likewise.
+	* lib/colorize-impl.c: Factor isatty call out of here...
+	* lib/ms/colorize-impl.c: ... and here...
+	* src/main.c: ... into here.
+
+2012-01-02  Jim Meyering  <meyering@redhat.com>
+
+	tests: avoid minor "make check" failure
+	* tests/r-dot: Make executable, to avoid triggering a failed
+	consistency test in "make check".
+
+2012-01-02  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: -r with no args now searches "."
+	This is a patch I've been meaning to put in for years.
+	When I added support for "grep -r", I forgot to have "grep -r PAT"
+	search the working directory by default, instead of searching
+	standard input (which makes no sense, even if stdin is a directory).
+	This is not an upward compatible change, since "grep -r PAT <file"
+	will no longer search standard input, but that's OK; nobody should
+	be using "grep -r" that way anyway.
+	* NEWS: Document this.
+	* doc/grep.texi (File and Directory Selection, grep Programs, Usage):
+	Likewise.
+	* src/main.c (usage): Likewise.
+	(grepdir): If DIR is null, search the working directory, but do
+	not prepend "./" to the file names.
+	(main): If recursing and no operands are given, search ".".
+	* tests/Makefile.am (TESTS): Add r-dot.
+	* tests/r-dot: New file.
+
+	grep: prefer fgets to printf, _ to gettext
+	* lib/colorize.h (print_end_colorize):
+	* lib/ms/colorize-impl.c (print_end_colorize):
+	Use fputs instead of printf.
+	* src/main.c (usage): Likewise.  Use _ instead of gettext.
+
+2012-01-01  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: check stdin like other files
+	* NEWS: Document this.
+	* src/main.c (grepfile): Revamp tests for input files so that
+	standard input is tested like other files.  For example, report
+	an error if standard input equals standard output.
+	Prefer open+fstat to stat+open if possible, as open+fstat is
+	usually a bit faster and avoids a race condition.
+	* tests/in-eq-out-infloop: Add tests for cases like
+	'grep pat <file >>file'.
+
+2012-01-01  Jim Meyering  <meyering@redhat.com>
+
+	maint: update all copyright year number ranges
+	Run "make update-copyright".
+
+2011-12-31  Paul Eggert  <eggert@cs.ucla.edu>
+
+	grep: lower-case function names
+	These names used to be macros, but they're functions now.
+	All callers changed.
+	* src/main.c (pr_sgr_start): Rename from PR_SGR_START.
+	(pr_sgr_end): Rename from PR_SGR_END.
+	(pr_sgr_start_if): Rename from PR_SGR_START_IF.
+	(pr_sgr_end_if): Rename from PR_SGR_END_IF.
+
+	ms: move Microsoft-specific stuff to lib/ms
+	* cfg.mk (exclude_file_name_regexp--sc_prohibit_strcmp)
+	(exclude_file_name_regexp--sc_require_config_h)
+	(exclude_file_name_regexp--sc_require_config_h_first):
+	New rules.
+	* lib/colorize.c, lib/colorize.h, lib/colorize-impl.c:
+	* lib/ms/colorize.h, lib/ms/colorize-impl.c: New files.
+	* configure.ac (GREP_SRC_INCLUDES): New macro.
+	* lib/Makefile.am (libgreputils_a_SOURCES): Add colorize.[ch].
+	(EXTRA_DIST): New macro.
+	* src/Makefile.am (DEFAULT_INCLUDES): New macro.
+	* src/main.c: Include colorize.h.
+	(PR_SGR_START, PR_SGR_END, PR_SGR_START_IF, PR_SGR_END_IF):
+	Now static functions, not macros.
+	(hstdout, norm_attr, w32_console_init, w32_sgr2attr)
+	(w32_clreol) [__MINGW32__]: Move to lib/ms/colorize-impl.c.
+	(pr_sgr_start, pr_sgr_end): Remove; callers changed to use new
+	print_start_colorize, print_end_colorize from colorize.h.
+	(init_colorize): Rename from w32_console_init and move to
+	colorize module; caller changed.
+	(should_colorize): Move to colorize module.
+
+	grep: do input==output check more like dir loop check
+	* src/main.c (grepfile): Just use SAME_INODE; don't bother
+	with SAME_REGULAR_FILE.  This works better on properly-working
+	POSIX hosts, since it handles the case where the file is changing
+	as we grep it.  It works worse on hosts that don't support st_ino
+	properly, but in practice this isn't that much of a problem here.
+	* src/system.h (same_file_attributes, SAME_REGULAR_FILE):
+	Remove; no longer needed.
+
+	build: update gnulib submodule to latest
+
+2011-12-28  Paul Eggert  <eggert@cs.ucla.edu>
+
+	maint: remove now-unused/obsolete files
+	* README.DOS: Remove file.
+	* m4/djgpp.m4: Likewise.
+	* .gitignore: Remove reference to m4/djgpp.m4.
+
+2011-12-28  Jim Meyering  <meyering@redhat.com>
+
+	maint: distribute ChangeLog-2009
+	* Makefile.am (EXTRA_DIST): Add ChangeLog-2009.
+	Spotted by Eli Zaretskii.
+
+2011-12-28  Jim Meyering  <meyering@redhat.com>
+
+	main.c: add some 'const' directives
+	* src/main.c (color_dict, fg_color, bg_color, cap): Declare const.
+
+	No semantic change.
+
+2011-12-28  Jim Meyering  <meyering@redhat.com>
+
+	main.c: correct indentation and formatting style
+	* src/main.c: Correct many formatting inconsistencies.
+	No semantic change.
+
+	avoid new syntax-check failures
+	* cfg.mk (old_NEWS_hash): Update, to accommodate old NEWS modification.
+	* src/main.c: Indent solely with spaces, never with TABs.
+	(should_colorize): Remove useless parens in #if directive.
+
+2011-12-28  Eli Zaretskii  <eliz@gnu.org>
+
+	Fix whitespace, indentation and documentation
+	* src/main.c (parse_grep_colors): Fix indentation.
+	(usage): Mention MS-Windows in help text for -U and -u options.
+
+	update NEWS for MS-Windows changes
+	* NEWS: Mention MS-Windows related bugfixes and enhancements.
+
+	Fix the test suite for MS-Windows.
+	* tests/include-exclude: Use --directories=skip, to avoid
+	gratuitous failures on systems that cannot grep directories.
+	* tests/reversed-range-endpoints: Don't reject program names with
+	leading directories and drive letters.
+	* tests/warn-char-classes: Likewise.
+
+	Support color highlighting on MS-Windows
+	* src/main.c (SGR_START, SGR_END, PR_SGR_FMT, PR_SGR_FMT_IF): Remove.
+	(PR_SGR_START, PR_SGR_START_IF): Replace with pr_sgr_start.
+	(PR_SGR_END, PR_SGR_END_IF): Replace with pr_sgr_end.
+	(pr_sgr_start, pr_sgr_end, should_colorize): New functions.
+	(w32_console_init, w32_sgr2attr, w32_clreol) [__MINGW32__]: New functions.
+	(main): Use should_colorize.  Invoke w32_console_init.
+
+2011-12-24  Paul Eggert  <eggert@cs.ucla.edu>
+
+	don't ignore errors when reading a directory
+	grep no longer silently suppresses errors when reading a directory
+	as if it were a text file.  For example, "grep x ." now reports a
+	read error on most systems; formerly, it ignored the error.
+	Problem reported as an aside by Bob Proulx (Bug#10355).
+	* NEWS: Document this.
+	* src/main.c (grep, grepfile): Implement this.  Simplify the code
+	considerably.
+	* src/system.h (is_EISDIR): Remove; no longer needed.
+
+	--include etc. now work on command-line args more consistently
+	--include and --exclude apply only to non-directories and
+	--exclude-dir applies only to directories.  "-" (standard input)
+	is never excluded, since it is not a file name.
+	This bug was discovered while fixing a read-directory bug (Bug#10355).
+	* NEWS: Document this.
+	* src/main.c (main): Implement this.
+	* tests/include-exclude: Test for it.
+
+2011-12-24  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule to latest
+
+2011-12-12  Arnold D. Robbins  <arnold@skeeve.com>
+
+	doc: improve grep.texi
+	* doc/grep.texi: General editing for improved aesthetics.
+	Also fix a few problems.
+
+2011-12-12  Jim Meyering  <meyering@redhat.com>
+
+	build: use gnulib's iswctype wcscoll
+	* bootstrap.conf (gnulib_modules): Add iswctype and wcscoll.
+	* configure.ac: Remove explicit checks for those functions.
+	* src/mbsupport.h (MBS_SUPPORT): Define to 1 if not already defined.
+	Remove the conditional, now that we're guaranteed by gnulib to have
+	wcscoll and iswctype.
+	Suggested by Alan Hourihane in http://savannah.gnu.org/bugs/?34930
+
+	disable the new input==output guard for additional options
+	* src/main.c (grepfile): Do not reject input == output also
+	when using a few other options.
+	* tests/in-eq-out-infloop: Test these new cases.
+	* NEWS (Bug fixes): Mention it
+
+2011-12-11  Nicolas Vigier  <boklm@mars-attacks.org>
+
+	do not reject "grep -qr . > out"
+	The recent fix to avoid an infinite disk-filling loop, commit 5e20a38a,
+	introduced a minor regression.  If you use grep with -q and -r, and
+	redirect output to a file that will be traversed, then grep would
+	reject the command, even though it will generate no output.
+	In that case, there is no risk of an infinite loop.
+	* src/main.c (grepfile): Do not reject input == output when
+	using --quiet/--silent (-q).
+	Reported by J H Wilson in http://bugs.mageia.org/show_bug.cgi?id=3501
+	forwarded by Nicolas Vigier to https://savannah.gnu.org/bugs/?34917
+
+2011-11-29  Arnold Robbins  <arnold@skeeve.com>
+
+	dfa: do not call nl_langinfo in !MBS_SUPPORT mode
+	* src/dfa.c (using_utf8) [!MBS_SUPPORT]: Remove erroneous "defined"
+	in cpp test for MBS_SUPPORT.  Since commit a163349d, MBS_SUPPORT is 0/1.
+	This error caused trouble only in the !MBS_SUPPORT case.
+
+	dfa: avoid warning from deficient compiler in !MBS_SUPPORT mode
+	* src/dfa.c (setbit_wc) [!MBS_SUPPORT]: Add explicit "return false;"
+	after "abort ();", to avoid a warning from deficient compilers.
+
+2011-11-29  Jim Meyering  <meyering@redhat.com>
+
+	tests: use "compare exp out", not "compare out exp"
+	Likewise, when an empty file is expected, use "compare /dev/null out",
+	not "compare out /dev/null". I.e., specify the expected/desired contents
+	via the first file name.  Prompted by a suggestion from Bruno Haible
+	in http://thread.gmane.org/gmane.comp.gnu.grep.bugs/4020/focus=29154
+
+	Run these commands:
+
+	    git grep -l -E 'compare [^ ]+ exp' \
+	      |xargs perl -pi -e 's/(compare) (\S+) (exp\S*)/$1 $3 $2/'
+	    git grep -l -E 'compare [^ ]+ /dev/null' \
+	      |xargs perl -pi -e 's/(compare) (\S+) (\/dev\/null)/$1 $3 $2/'
+
+2011-11-29  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule to latest
+
+2011-11-28  Jim Meyering  <meyering@redhat.com>
+
+	build: accommodate -Werror=suggest-attribute=pure
+	Now that we're using the latest manywarnings module from gnulib,
+	accommodate gcc's -Werror=suggest-attribute=pure option by marking
+	suggested functions with gnulib-defined _GL_ATTRIBUTE_PURE.
+	* src/kwset.c (hasevery): Mark function with pure attribute.
+	(bmexec): Likewise.
+	* src/dfa.c (nsubtoks, istrstr, find_pred, dfamusts): Likewise.
+	* configure.ac: Disable (for lib/) options that seem not to be worth
+	the trouble: -Wunsuffixed-float-constants and -Wformat-nonliteral.
+
+2011-11-21  Bruno Haible  <bruno@clisp.org>
+
+	build: fix "make check" error on OSF/1
+	* tests/Makefile.am (TESTS_ENVIRONMENT): Test the value of the variable
+	BASH_VERSION, not the literal ASH_VERSION.
+
+2011-11-21  Jim Meyering  <meyering@redhat.com>
+
+	portability: work consistently on *BSD systems
+	* src/dfa.c (is_valid_unibyte_character): Define.
+	(IS_WORD_CONSTITUENT): Use it here, to make grep work consistently
+	even on *BSD systems, which use different tables for ctype macros
+	like isalpha. http://thread.gmane.org/gmane.comp.gnu.grep.bugs/4022
+	With help from Bruno Haible.
+
+2011-11-20  Jim Meyering  <meyering@redhat.com>
+
+	maint: consistently use NULL, not 0, when comparing pointers
+	* src/dfa.c (dfaanalyze): Compare trans[s] with NULL, not 0.
+
+	maint: remove an avoidable #ifdef/#endif pair
+	* src/dfa.c (dfaanalyze): Remove avoidable #ifdef around "{".
+
+	tests: fix typo in last change
+	* tests/word-delim-multibyte: Use double quotes around $e_acute,
+	not single quotes.  Spotted by Bruno Haible.
+	This and the preceding change do not resolve the XPASS failure
+	on OpenBSD 4.9 after all.  See the explanation at
+	http://thread.gmane.org/gmane.comp.gnu.grep.bugs/4022
+
+	tests: avoid unwarranted test failure on *BSD-based systems
+	* tests/word-delim-multibyte (e_acute): Use a more portable
+	representation of e-acute.  Reported by Bruno Haible.
+
+2011-11-19  Jim Meyering  <meyering@redhat.com>
+
+	maint: accommodate -Wdeclaration-after-statement, but only in dfa.c,
+	and because doing so does not impact readability/maintainability.
+	This is solely to accommodate gawk users who are stuck with ancient gcc.
+	This is no excuse to change any other code in grep.
+	* src/dfa.c (dfaoptimize, parse_bracket_exp): Move declaration
+	to precede first statement in block.
+
+2011-11-16  Jim Meyering  <meyering@redhat.com>
+
+	maint: post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.10
+	* NEWS: Record release date.
+
+	build: update gnulib submodule to latest
+
+2011-11-13  Jim Meyering  <meyering@redhat.com>
+
+	maint: update bootstrap and init.sh from gnulib
+	* tests/init.sh: Update from gnulib.
+	* bootstrap: Likewise.
+
+2011-11-12  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib for exclude-test fixes
+
+	tests: make our "export" replacement efficient with modern shells
+	* tests/Makefile.am (TESTS_ENVIRONMENT): Use a trivial and efficient
+	implementation with a shell that supports "export var=val".
+	Use the sed-invoking replacement only when necessary.
+	Improved by Stefano Lattarini.
+
+	tests: make the replacement export function more robust
+	* tests/Makefile.am (sed_quote_value): Also quote single quotes.
+	Remove sed's -e options.  Not needed.
+
+2011-11-12  Bruno Haible  <bruno@clisp.org>
+
+	tests: fix test suite execution failure on OSF/1 5.1
+	* tests/Makefile.am (TESTS_ENVIRONMENT): Use a shell function to
+	ensure that we use only the portable form of the 'export' shell
+	built-in.
+
+	tests: don't assume that /bin/bash exists
+	* tests/fedora: Run using /bin/sh, not /bin/bash.
+
+	tests: avoid unwarranted failures due to SATAN's timeout
+	* tests/init.cfg (require_timeout_): Also ensure that
+	timeout exits with its child's exit status.
+
+	build: fix compilation error on MSVC 9 to due Pexecute() declaration
+	* src/pcresearch.c (WITHOUT_PCRE_NORETURN): Remove macro.
+	(Pexecute): Replace abort() call with code that does not trigger GCC
+	warnings.
+
+	tests: fix high-bit-range test failure on OSF/1 5.1
+	* tests/high-bit-range: Use octal escape instead of hexadecimal escape
+	sequence.
+
+2011-11-11  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib for solaris test fix
+
+2011-11-10  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule to latest
+
+	maint: adjust the URL that will appear in the generated announcement
+	* cfg.mk (url_dir_list): Use this http://ftp.gnu.org/gnu/$(PACKAGE)
+	for the first link listed in the generated announcement.
+	announce-gen now provides the faster mirror link automatically.
+
+2011-11-06  Jim Meyering  <meyering@redhat.com>
+
+	build: stop distributing gzip'd releases;  xz is enough
+	* configure.ac (AM_INIT_AUTOMAKE): Add no-dist-gzip.
+	* NEWS (Build-related): Mention that we're dropping .tar.gz.
+
+	build: update gnulib submodule to latest
+
+2011-10-14  Stefano Lattarini  <stefano.lattarini@gmail.com>
+
+	distcheck: ensure dist-hook fails if syntax-check fails
+	* Makefile.am (run-syntax-check): Fix logic, to ensure that
+	the recipe of this target returns a non-zero exit status if
+	"make syntax-check" fails.
+
+2011-10-12  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule to latest
+	This should fix a few portability problems, including one on HP-UX
+	and a test-float failure on PPC, reported by Andreas Metzler.
+
+2011-10-10  Stefano Lattarini  <stefano.lattarini@gmail.com>
+
+	gitignore: merge top-level and tests/ .gitignore files
+	* tests/.gitignore: Remove; what little remained of its
+	contents has been moved ...
+	* .gitignore: ... here.
+
+	tests: tiny simplification in TESTS_ENVIRONMENT definition
+	* tests/Makefile.am (TESTS_ENVIRONMENT): Remove redundant use of
+	`export'.
+
+2011-10-10  Stefano Lattarini  <stefano.lattarini@gmail.com>
+
+	tests: support development version of automake too
+	This change implements a more correct and idiomatic use of the
+	features of the Automake-provided 'parallel-tests' harness.
+	Moreover, this change is required in order for the testsuite to
+	continue to work with the new testsuite harness that is planned
+	to be introduced in Automake 1.12 (which, as of the writing date,
+	is still under development and in late alpha state).
+
+	* tests/Makefile.am (TESTS_ENVIRONMENT): The development version of
+	automake dos not support setting the interpreter delegated to run
+	the tests scripts in this variable; instead, use ...
+	(LOG_COMPILER): ... this variable.
+	* .gitignore: Ignore `.trs' files in directory `tests/'.
+	* build-aux/.gitignore: Ignore `test-driver' script.
+
+2011-10-03  Eli Zaretskii  <eliz@gnu.org>
+
+	dfa: don't mishandle high-bit bytes in a regexp with signed-char
+	This appears to arise only on systems for which "char" is signed.
+	* src/dfa.c (FETCH_WC, FETCH): Produce an unsigned value, rather
+	than a sign-extended one.  Fixes a bug on MS-Windows with compiling
+	patterns that include characters with the 8-th bit set.
+	(to_uchar): Define.  From coreutils.
+	Reported by David Millis <tvtronix@yahoo.com>.
+	See http://thread.gmane.org/gmane.comp.gnu.grep.bugs/3893
+	* NEWS (Bug fixes): Mention it.
+
+2011-09-16  Jim Meyering  <meyering@redhat.com>
+
+	maint: dfa: simplify multi-byte-related conditionals
+	* src/dfa.c (setbit_case_fold_c, parse_bracket_exp, lex):
+	(addtok_mb, dfaparse): Change each "MBS_SUPPORT && MB_CUR_MAX > 1"
+	test to just "MB_CUR_MAX > 1".
+	* src/dfasearch.c (kwsincr_case, EGexecute): Likewise.
+	* src/kwsearch.c (Fcompile, Fexecute): Likewise.
+	* src/searchutils.c (kwsinit): Likewise.
+	* src/dfa.c (parse_bracket_exp): Convert
+	"if (!MBS_SUPPORT || MB_CUR_MAX == 1)" to
+	"if (MB_CUR_MAX == 1)" and do this:
+	-      assert(!MBS_SUPPORT || MB_CUR_MAX == 1);
+	+      assert(MB_CUR_MAX == 1);
+
+	maint: dfa: simplify several expressions
+	* src/dfa.c (dfainit): Set d->mb_cur_max unconditionally, now
+	that MB_CUR_MAX is always usable.  With that, simplify all
+	"MBS_SUPPORT && d->mb_cur_max > 1" to simply "d->mb_cur_max > 1".
+	(dfastate, dfaexec, dfainit, dfafree): Simplify, removing each
+	now-unnecessary "MBS_SUPPORT &&".
+
+	maint: dfa: avoid in-function "#if MBS_SUPPORT" tests
+	* src/dfa.c (setbit_case_fold_c): Remove "#if MBS_SUPPORT" in favor
+	of simple "if (MBS_SUPPORT ...".
+	(dfaexec, addtok): Likewise.
+
+	maint: ensure that MB_CUR_MAX is defined even when !MBS_SUPPORT
+	* src/mbsupport.h [!MBS_SUPPORT] (MB_CUR_MAX): Define to 1.
+
+	build: fix compilation failure when MBS_SUPPORT is 0
+	* src/dfa.c (add_utf8_anychar): Always compile this function,
+	but when MBS_SUPPORT is 0, give it an empty body.
+	(prepare_wc_buf): Likewise.
+	[! MBS_SUPPORT] (setbit_wc): Define to always abort.
+
+	maint: dfa: simplify dfaoptimize
+	* src/dfa.c (dfaoptimize): Simplify.
+	(dfacomp): Remove now-redundant "if (MBS_SUPPORT)" guard,
+	since dfaoptimize does nothing if !MBS_SUPPORT.
+
+	maint: dfa: remove some #if MBS_SUPPORT guards
+	* src/dfa.c: Replace a few "#if MBS_SUPPORT" directives with
+	"if (MBS_SUPPORT)".  Remove some altogether.
+
+	maint: dfa: convert #if-MBS_SUPPORT (dfastate)
+	* src/dfa.c (dfastate): Use regular "if", not #if MBS_SUPPORT.
+
+	maint: dfa: convert #if-MBS_SUPPORT (dfastate)
+	* src/dfa.c (dfastate): Use regular "if", not #if MBS_SUPPORT.
+
+	maint: dfa: convert #if-MBS_SUPPORT (state_index)
+	* src/dfa.c (state_index): Use regular "if", not #if MBS_SUPPORT.
+
+	maint: dfa: convert #if-MBS_SUPPORT (dfaparse)
+	* src/dfa.c (dfaparse): Use regular "if", not #if MBS_SUPPORT.'
+
+	maint: dfa: convert #if-MBS_SUPPORT (copytoks)
+	* src/dfa.c (copytoks): Use regular "if", not #if MBS_SUPPORT.'
+
+	maint: dfa: convert #if-MBS_SUPPORT (lex)
+	* src/dfa.c (lex): Use regular "if", not #if MBS_SUPPORT.'
+
+	maint: dfa: convert #if-MBS_SUPPORT (parse_bracket_exp)
+	* src/dfa.c (parse_bracket_exp): Use regular "if", not #if MBS_SUPPORT.
+
+	maint: dfa: convert #if-MBS_SUPPORT (parse_bracket_exp)
+	* src/dfa.c (parse_bracket_exp): Use regular "if", not #if MBS_SUPPORT.
+
+	maint: dfa: convert #if-MBS_SUPPORT (parse_bracket_exp)
+	* src/dfa.c (parse_bracket_exp): Use regular "if", not #if MBS_SUPPORT.
+
+	maint: dfa: convert #if-MBS_SUPPORT (dfaexec)
+	* src/dfa.c (dfaexec): Use regular "if", not #if MBS_SUPPORT.
+
+	maint: dfa: convert #if-MBS_SUPPORT (dfaexec)
+	* src/dfa.c (dfaexec): Use regular "if", not #if MBS_SUPPORT.
+	Also add curly braces around multi-line if/else blocks.
+
+	maint: dfa: remove #if-MBS_SUPPORT (free_mbdata)
+	* src/dfa.c (free_mbdata): Remove the #if guard altogether.
+
+	maint: dfa: convert #if-MBS_SUPPORT (dfaoptimize, dfacomp)
+	* src/dfa.c (dfaoptimize, dfacomp): Use regular "if",
+	not #if MBS_SUPPORT.
+
+	maint: dfa: convert #if-MBS_SUPPORT (dfafree)
+	* src/dfa.c (dfafree): Use regular "if", not #if MBS_SUPPORT.
+
+	maint: dfa: convert #if-MBS_SUPPORT (parse_bracket_exp, part1)
+	* src/dfa.c (parse_bracket_exp): Remove in-function #if MBS_SUPPORT.
+
+	maint: remove #if-MBS_SUPPORT declaration guards
+	* src/search.h: Don't bother to #if-out declarations.
+
+	maint: convert #if-MBS_SUPPORT (EGexecute)
+	* src/dfasearch.c (EGexecute): Remove in-function #if MBS_SUPPORT.
+
+	maint: convert #if-MBS_SUPPORT (kwsincr_case)
+	* src/dfasearch.c (kwsincr_case): Remove in-function #if MBS_SUPPORT.
+	Move decl's down.
+
+	maint: convert #if-MBS_SUPPORT (Fcompile, etc.)
+	* src/kwsearch.c (Fcompile, Fexecute): Remove in-function #if MBS_SUPPORT.
+	(Fcompile): Rearrange some declarations.  No semantic change.
+
+	maint: convert #if-MBS_SUPPORT (kwsinit)
+	* src/searchutils.c (kwsinit): Remove in-function #if MBS_SUPPORT.
+
+	maint: dfa: remove case-guarding #if-MBS_SUPPORT
+	* src/dfa.c [DEBUG] (prtok): Remove now-useless #if-MBS_SUPPORT.
+
+2011-09-15  Jim Meyering  <meyering@redhat.com>
+
+	maint: remove #if MBS_SUPPORT around member declaration
+	* src/dfa.c (dfastate): Don't #ifdef-out "mbps" position_set member.
+
+	maint: dfa: remove #if MBS_SUPPORT around struct definition
+	* src/dfa.c (struct mb_char_classes): Don't #ifdef-out declarations.
+
+	build: avoid compilation failure when building without PCRE support
+	* src/pcresearch.c [!HAVE_LIBPCRE] (WITHOUT_PCRE_NORETURN): Define
+	to _Noreturn, not obsoleted-by-gnulib _GL_ATTRIBUTE_NORETURN.
+	Reported by Eric Blake.
+
+	tests: stop using skip_test_; use skip_ instead
+	* tests/init.cfg (skip_test_): Remove definition.  Use the improved
+	skip_ function from init.sh, now that it has the same feature.
+	* tests/euc-mb: s/skip_test_/skip_/
+	* tests/sjis-mb: Likewise.
+	* tests/fmbtest: Likewise.
+
+	tests: skip tests that require MBS support
+	* tests/init.cfg (require_compiled_in_MB_support): New function.
+	* tests/char-class-multibyte: Use it here, since this test cannot
+	succeed without MBS support.
+	* tests/equiv-classes: Likewise.
+	* tests/euc-mb: Likewise.
+	* tests/fgrep-infloop: Likewise.
+	* tests/init.cfg: Likewise.
+	* tests/prefix-of-multibyte: Likewise.
+	* tests/turkish-I: Likewise.
+	* tests/sjis-mb: Likewise.
+
+	tests: make fmbtest explain (to stderr, not log) why it is skipped
+	* tests/fmbtest: Use skip_ and fail_ to give better diagnostics.
+
+	maint: dfa: improve comments
+	* src/dfa.c (match_mb_charset, match_anychar): Improve comments.
+
+2011-09-14  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule to newer
+
+	maint: correct indentation
+	* src/dfa.c (dfaexec): Reposition curly braces to match indentation style.
+	Remove useless comment.
+
+	maint: move declaration "down" to inner scope where it is used
+	* src/dfa.c (dfaexec): Move decl of local down into scope where used.
+
+2011-09-07  Jim Meyering  <meyering@redhat.com>
+
+	doc: use "file name" consistently in grep's --help output
+	* src/main.c (usage): Use "file name", not "filename" in descriptions
+	of --with-filename (-H), --no-filename (-h) and --label=LABEL.
+	Suggested by Sequoia McDowell.
+
+	bug: requires ru_RU.KOI8-R".  [bug introduced in grep-2.9]
+
+2011-08-31  Matthew Burgess  <matthew@linuxfromscratch.org>
+
+	tests: remove debug code that would cp to /t
+	* tests/unibyte-bracket-expr: Remove debug artifact introduced
+	by 2011-06-02 commit de5f7000, "tests: exercise a uni-byte [...]
+	bug: requires ru_RU.KOI8-R".  [bug introduced in grep-2.9]
+
+2011-08-20  Jim Meyering  <meyering@redhat.com>
+
+	build: use largefile module and update to latest gnulib
+	* configure.ac: Remove AC_SYS_LARGEFILE, subsumed by ...
+	* bootstrap.conf (gnulib_modules): ...this.  Use largefile module.
+	* gnulib: Update to latest.
+
+	maint: clean up and plug a leak-on-OOM
+	* src/dfa.c (icatalloc): Clean up; use xrealloc in place of malloc
+	and realloc; remove conditionals that are unnecessary, now that
+	failed allocation results in exit.
+	(enlist): Use xrealloc in place of realloc; remove conditional.
+	(comsubs): Avoid leak upon failed enlist call.
+	(dfamust): Use xmalloc in place of malloc.
+	Remove conditionals, now that icpyalloc and icatalloc never return NULL.
+
+	maint: use x2nrealloc, not xrealloc
+	* src/main.c (main): Use x2nrealloc, not xrealloc
+
+2011-07-24  Jim Meyering  <meyering@redhat.com>
+
+	tests: add a test to trigger the bug
+	* tests/Makefile.am (TESTS): Add it.
+	* tests/in-eq-out-infloop: Exercise the bug/fix.
+
+	exit 2 (rather than infloop) when an input file is also on stdout
+	This avoids a potential "infinite" disk-filling loop.
+	Reported in http://savannah.gnu.org/patch/?5316
+	and http://savannah.gnu.org/bugs/?17457.
+	* src/main.c: Include "quote.h".
+	(out_stat): New global.
+	(grepfile): Compare each regular file's dev/ino/etc.
+	with those from the file on stdout (if it too is regular).
+	(main): Set out_stat, if stdout is a regular file.
+	* src/system.h: Include "same-inode.h".
+	(same_file_attributes): Define.  From diffutils.
+	(SAME_REGULAR_FILE): Define.
+	* bootstrap.conf (gnulib_modules): Use quote, not quotearg.
+	Use same-inode.
+	* NEWS (Bug fixes): Mention it.
+
+2011-07-15  Reuben Thomas  <rrt@sc3d.org>
+
+	doc: improve documentation of character classes in the man page
+	* doc/grep.in.1: Reword documentation of character classes.
+
+2011-07-12  Jim Meyering  <meyering@redhat.com>
+
+	dfa: remove unnecessary inclusion of verify.h
+	* src/dfa.c: Don't include "verify.h".
+
+	dfa: simplify use of *ALLOC macros
+	* src/dfa.c (XNMALLOC, XCALLOC): Redefine without outer cast-to-(t *).
+	(CALLOC, MALLOC, REALLOC): Remove type "t" parameter and adjust callers.
+
+	dfa: change semantics of REALLOC_IF_NECESSARY's 3rd parameter
+	* src/dfa.c (REALLOC_IF_NECESSARY): Change meaning of 3rd param,
+	from "maximum index" to 1 greater than that: the required number
+	of *P-sized elements.  Note that only some of the uses of
+	REALLOC_IF_NECESSARY needed to be adjusted, the others had already
+	required an extra element.
+
+	dfa: rename REALLOC_IF_NECESSARY param/local for clarity
+	* src/dfa.c (REALLOC_IF_NECESSARY): Rename nalloc and new_nalloc
+	to n_alloc and new_n_alloc.
+
+	dfa: prepare for a semantic change in REALLOC_IF_NECESSARY
+	* src/dfa.c (REALLOC_IF_NECESSARY): Remove "t" (type) parameter.
+	Use (*p) instead.  Adjust all callers.
+
+	dfa: add braces to REALLOC_IF_NECESSARY definition
+	* src/dfa.c (REALLOC_IF_NECESSARY): Add curly braces; use TABs
+	to right-indent.
+
+2011-06-28  Paolo Bonzini  <bonzini@gnu.org>
+
+	doc: improve documentation of character classes
+	* doc/grep.texi (Character classes): Mention explicitly when
+	examples refer to the C locale, explain better the general
+	meaning of character classes.
+
+2011-06-28  Jim Meyering  <meyering@redhat.com>
+
+	dfa: fix the root cause of the heap overrun
+	dfa's "insert" function was supposed to be maintaining the position
+	list sorted on *decreasing* index, but since the 2009-12-09 "Speed
+	up insert" commit, 62458291, it was using code that assumed the data
+	were sorted on *increasing* index.  As such, sometimes it would no
+	longer merge constraints (not finding a match) and would append
+	entries that normally would have matched and been merged.  Those
+	erroneous append operations resulted in the heap overrun fixed by
+	2011-06-17 commit 0b91d692 by doubling the array size.
+	* src/dfa.c (insert): Fix the comparison.
+	(dfaanalyze): Now that that's fixed, revert commit 0b91d692,
+	allocating space for only d->nleaves entries, not double that.
+	As far as I can tell, this change has no effect other than
+	decreased memory usage, although it may improve performance
+	slightly, since the resulting list of positions is half as long
+	as it used to be.
+
+2011-06-28  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: use memcpy to copy position_sets
+	* src/dfa.c (copy): Use memcpy.
+
+	dfa: use copyset to copy charclasses
+	* src/dfa.c (add_utf8_anychar): Change memcpy to copyset.
+
+	gnulib: Update
+	Fixes mmap-anon.m4 conflict with fn_grep, reported by Rainer Orth.
+
+2011-06-21  Jim Meyering  <meyering@redhat.com>
+
+	maint: update bootstrap from gnulib
+	* bootstrap: Update to latest, so it no longer inserts empty lines
+	in .gitignore files.
+	* .gitignore: Let bootstrap move "!..." lines to end of file.
+
+	post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.9
+	* NEWS: Record release date.
+
+	build: avoid a warning when building with --disable-perl-regexp...
+	and --enable-gcc-warnings.
+	* src/pcresearch.c (WITHOUT_PCRE_NORETURN): Define.
+	Remove the unreachable return statement.
+	Reported by Eric Blake.
+
+	tests: ensure that each test script is executable
+	This adds a rule run at "make check" time to ensure that
+	test scripts are consistently executable.
+	This change is not required for "make check", but makes it easier
+	for people to run scripts manually, but that is discouraged because
+	doing so makes it easy to omit important variable settings that
+	are normally provided via TESTS_ENVIRONMENT.
+	This change also makes each of the existing TESTS executable.
+	* tests/Makefile.am (check_executable_TESTS): New rule.
+	(check): Depend on it.
+	* tests/{all_scripts}: chmod 755.
+	Prompted by a report from Eric Blake.
+
+	maint: update bootstrap from gnulib
+	* bootstrap: Update from gnulib.
+
+	maint: update po/POTFILES.in
+	* po/POTFILES.in: Remove dfasearch.c, now that it no longer
+	contains a translatable diagnostic.
+
+	tests: include-exclude: avoid false positive failure on FreeBSD
+	* tests/include-exclude: Avoid false-positive failure due to
+	matching "a" in a directory on FreeBSD, when searching a directory
+	without "-r".  Search for '^aaa$' rather than just 'a'.
+	Adjust test inputs and expected output files accordingly.
+
+	dfa: remove some useless casts
+	* src/dfa.c (icatalloc): Change type of "old" parameter
+	from "char const *" to "char *".
+	Don't cast-away const on realloc argument.
+	Remove now-unnecessary const-discarding cast.
+	Don't (void)-cast strcpy result.
+	* src/dosbuf.c (undossify_input): Remove anachronistic
+	cast-to-"char *" of realloc argument.
+
+	dfa: more heap-allocation-related overflow protection
+	* src/dfa.c (enlist): Use xnrealloc, not realloc.
+	Also, remove unnecessary cast-to-(char *).
+	(dfamust): Use xnmalloc, not malloc.  Before, this code would
+	return upon malloc failure (xnmalloc exits upon failure), but
+	later, via the *ALLOC macros, it could already exit, so this
+	new potential exit point is nothing new.  The same applies
+	to enlist, since it is called only through dfamust.
+
+	tests: update init.sh; simplify TESTS_ENVIRONMENT
+	* tests/init.sh: Update from coreutils.
+	* tests/Makefile.am (TESTS_ENVIRONMENT): Remove shell_or_perl_
+	function.  Instead, just use $(SHELL), since grep has no test
+	that starts with #!/usr/bin/perl.
+
+2011-06-20  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule to latest
+
+	build: avoid configure/gnulib-related errors
+	* bootstrap.conf: Remove now-unnecessary code to exclude
+	gettext/intl-related m4 tests.
+
+2011-06-19  Jim Meyering  <meyering@redhat.com>
+
+	maint: tighten up superfluous code
+	* src/main.c (parse_grep_colors): Use xstrdup in place of xmalloc,
+	a useless test, strlen, and strcpy.
+
+2011-06-19  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: avoid possibility of overflow
+	* src/dfa.c (REALLOC_IF_NECESSARY, CALLOC, MALLOC, REALLOC):
+	Use functions from xalloc.h to avoid overflow.
+	* src/dfasearch.c (GEAcompile): Use xnrealloc rather than realloc.
+	* src/pcresearch.c (Pcompile): Use xnmalloc, not xmalloc.
+
+2011-06-17  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule to latest
+
+	dfa: correct two uses of btowc
+	* src/dfa.c (setbit_c, setbit_case_fold_c): Compare the btowc
+	return value against WEOF, not EOF.  Suggested by Eli Zaretskii.
+	On a system like MinGW with unsigned wint_t, comparing a btowc
+	return value against EOF (-1) would always be false.
+
+	dfa: don't overrun a malloc'd buffer for certain regexps
+	* src/dfa.c (dfaanalyze): Allocate space for twice as many
+	positions as there are leaves.  Before this change, for some
+	regular expressions, DFA analysis would have inserted far more
+	"positions" than dfa->nleaves (up to double).
+	Reported by Raymond Russell in http://savannah.gnu.org/bugs/?33547
+	* tests/dfa-heap-overrun: Trigger the overrun.
+	* tests/Makefile.am (TESTS): Add it.
+	* NEWS (Bug fixes): Mention it.
+
+2011-06-08  Jim Meyering  <meyering@redhat.com>
+
+	tests: don't ignore sjis-mb test failure
+	I made changes that caused grep to segfault during "make check" --
+	as seen in dmesg output -- yet no test failed(!), and there was no
+	trace of the segfault in the logs.
+	* tests/sjis-mb (test_grep_reject): Ensure that output is empty.
+	Don't ignore test failure.
+
+2011-06-07  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: optimize wide characters in a bracket expression
+	* src/dfa.c (addtok): Compile characters to an alternation.  Handle the
+	case when nothing else remains in the MBCSET.
+
+	dfa: refactor to prepare for upcoming optimizations
+	* src/dfa.c (parse_bracket_exp): Move optimization of MBCSET from here...
+	(addtok): ... to here.
+
+2011-06-07  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: correct handling of single-byte character ranges
+	This provides a better fix for the unibyte-bracket-expr and high-bit-range
+	testcases, and fixes the latent bug tested by bogus-wctob.
+
+	* src/dfa.c (setbit_case_fold): Remove, replace with...
+	(setbit_wc, setbit_c, setbit_case_fold_c): ... these.
+	(parse_bracket_exp): Use setbit_case_fold_c when iterating over
+	single-byte sequences.  Use setbit_wc for multi-byte character sets,
+	and setbit_case_fold_c for single-byte character sets.
+	(lex): Use setbit_case_fold_c for single-byte character sets.
+
+2011-06-07  Paolo Bonzini  <bonzini@gnu.org>
+
+	tests: exercise latent bug in character ranges
+	* tests/bogus-wctob: New.
+	* Makefile.am (TESTS): Add it.
+
+2011-06-07  Jim Meyering  <meyering@redhat.com>
+
+	tests: exercise a uni-byte [...] bug: requires ru_RU.KOI8-R
+	* tests/unibyte-bracket-expr: New file.
+	* tests/Makefile.am (TESTS): Add it.
+	* init.cfg (require_ru_RU_koi8_r): New function.
+
+	fix the [...] bug also for relatively unusual uni-byte encodings
+	* src/dfa.c (setbit_case_fold): Also handle uni-byte locales
+	like the one mentioned in the original report: see 2011-05-07
+	commit d98338eb.  Re-reported by Santiago Ruano Rincón.
+	Note that most uni-byte locales are not affected.
+	* NEWS (Bug fixes): Mention it.
+
+	tests: use skip_test_, not skip_
+	Use skip_test_, not skip_.  The former prints its message both to
+	the log file and to FD 9 (redirected to tty via tests/Makefile.am),
+	while skip_ prints only to stderr, which goes to the log file.
+	* tests/init.cfg (skip_test_): New function.
+	Use skip_test_ in place of skip_ everywhere.
+	* tests/fmbtest: s/skip_/skip_test_/
+	* tests/sjis-mb: Likewise.
+	* tests/euc-mb: Likewise.
+
+	tests: fmbtest: factor
+	* tests/fmbtest: Factor out locale-name duplication.
+
+	tests: fix skip-inducing typo in fmbtest
+	* tests/fmbtest: Fix locale name typo (s/cz_CZ/cs_CZ/)
+	that would cause this test to be skipped every time.
+
+2011-06-07  Paolo Bonzini  <bonzini@gnu.org>
+
+	gnulib: adjust included modules
+	* bootstrap.conf (gnulib_modules): Drop strtoul, rename wctype to
+	wctype-h.
+
+2011-05-21  Jim Meyering  <meyering@redhat.com>
+
+	grep -P: don't abort upon exceeding PCRE's backtracking limit
+	* src/pcresearch.c (Pexecute): Handle PCRE_ERROR_MATCHLIMIT.
+	* tests/Makefile.am (XFAIL_TESTS): Remove pcre-abort.
+	* tests/pcre-abort: Expect failure, no output, and increase
+	the length of the input string, in case the backtracking limit
+	is ever raised.  Adjust comment.
+	* NEWS (Bug fixes): Mention it.
+
+	tests: show how to make grep -P abort
+	* tests/pcre-abort: New file.
+	Minimal testcase by Paolo Bonzini, derived from a report
+	by www.beaver@list.ru.
+	* tests/Makefile.am (TESTS): Add it.
+	(XFAIL_TESTS): Add it here, too, since this test always fails, for now.
+
+	tests: fix oddities in pcre-z
+	* tests/pcre-z: Redirect stderr inside $(), not outside.
+	Remove double quotes around $REGEX (which is just 'a') within
+	double-quoted "$(...)".  Split a long line.
+
+	tests: factor out a new require_pcre_ function
+	* tests/init.cfg (require_pcre_): New function, factored out of...
+	* tests/pcre-z: ...here.  Use the function.
+	* tests/pcre: Likewise.
+
+	tests: clean up pcre
+	* tests/pcre: Skip (don't pass) the test when PCRE support is disabled.
+	Don't redirect so much to /dev/null, now that all test output goes to
+	pcre.log.  Remove unnecessary braces and diagnostic about failing test.
+
+2011-05-13  Jim Meyering  <meyering@redhat.com>
+
+	post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.8
+	* NEWS: Record release date.
+
+	build: update gnulib, for fixed getcwd test
+
+	build: update gnulib submodule to latest
+
+	maint: remove syntax-checking sc_tight_scope rule
+	* src/Makefile.am (sc_tight_scope): Remove rule.
+	Now it's provided via gnulib's maint.mk.
+	* cfg.mk (sc_tight_scope): Likewise.
+
+2011-05-08  Jim Meyering  <meyering@redhat.com>
+
+	maint: use consistent declaration syntax
+	* src/grep.h (matchers): Declare consistently, so the sc_tight_scope
+	rule detects this as an extern-marked variable.
+
+2011-05-07  Jim Meyering  <meyering@redhat.com>
+
+	maint: use gnulib's new readme-release module
+	* bootstrap.conf (gnulib_modules): Add readme-release.
+	(bootstrap_epilogue): Add the recommended perl one-liner.
+	* README-release: Remove file; it is now generated from gnulib.
+	* .gitignore: Add it.
+	* gnulib: Update submodule to latest.
+
+	tests: exercise bug with 0x80..0xff in [...]
+	* tests/high-bit-range: New test, inspired by an example in the
+	report by Igor O. Ladygin: http://bugs.debian.org/624387,
+	via Santiago Ruano Rincón's http://savannah.gnu.org/bugs/?33198
+	* tests/Makefile.am (TESTS): Add it.
+
+	fix a bug whereby echo c|grep '[c]' would fail for any c in 0x80..0xff
+	* src/dfa.c (setbit_case_fold) [MBS_SUPPORT]: Set the bit also
+	when wctob returns EOF.
+	* NEWS (Bug fixes): Mention it.
+
+2011-05-02  Reuben Thomas  <rrt@sc3d.org>
+
+	doc: correct comment about mmap
+	* doc/grep.texi (Other Options) [--mmap]: This option is now
+	ignored, so using it can have no effect on performance.
+
+2011-05-02  Arnold D. Robbins  <arnold@skeeve.com>
+
+	build: move add_utf8_anychar into MBS ifdef
+
+2011-05-01  Arnold D. Robbins  <arnold@skeeve.com>
+
+	maint: remove GAWK ifndef; no longer needed
+
+2011-05-01  Jim Meyering  <meyering@redhat.com>
+
+	maint: remove now-unnecessary use of gnulib's strtol module
+	* bootstrap.conf (gnulib_modules): Remove now-obsolete "strtol".
+
+2011-04-29  Jim Meyering  <meyering@redhat.com>
+
+	maint: tweak README-release
+	* README-release: Add note to check the NixOS/Hydra autobuilder results.
+
+2011-04-28  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule to latest
+
+	maint: add the tight_scope syntax-checking rule
+	This ensures that the only externally scoped symbols are ones
+	that are explicitly marked as "extern" or white-listed like "main".
+	* src/Makefile.am (sc_tight_scope): New rule, copied from coreutils.
+	* cfg.mk (sc_tight_scope): Define, to hook to it from the top level.
+
+	maint: mark some function declarations as extern
+	* src/search.h: Add "extern" keyword to each function declaration.
+
+2011-04-23  Jim Meyering  <meyering@redhat.com>
+
+	maint: fix doubled-word typos in comments
+	* src/dfa.c (SUCCEEDS_IN_CONTEXT): Remove doubled "a".
+	* src/dfa.c (BACKREF): s/it it/it is/
+
+2011-04-09  Jim Meyering  <meyering@redhat.com>
+
+	maint: fix typos in comments: s/can not/cannot/
+	* src/dfa.c (check_matching_with_multibyte_ops, dfastate): As above.
+
+2011-03-19  Jim Meyering  <meyering@redhat.com>
+
+	maint: stop using .x-sc_* files to list syntax-check exemptions
+	Instead, use the new mechanism with which you merely use a
+	variable (derived from the rule name) defined in cfg.mk to an ERE
+	matching the exempted file names.
+	* gnulib: Update to latest, to get maint.mk that implements this.
+	* .x-sc_bindtextdomain: Remove file.
+	* .x-sc_prohibit_tab_based_indentation: Likewise.
+	* .x-sc_prohibit_xalloc_without_use: Likewise.
+	* .x-sc_space_tab: Likewise.
+	* cfg.mk: Define variables to exempt the same files.
+
+	build: correct my change of 2011-01-28
+	Do not override original dist-hook rule.
+	* Makefile.am (run-syntax-check): Rename from overriding dist-hook.
+	(dist-hook): Depend on run-syntax-check.
+
+2011-02-27  Jim Meyering  <meyering@redhat.com>
+
+	maint: update from gnulib
+	* bootstrap: Update from gnulib.
+	* tests/init.sh: Likewise.
+	* gnulib: Update to latest.
+
+2011-01-27  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule to latest
+
+	build: run syntax-check rules as part of "make dist"
+	* Makefile.am (dist-hook): Depend on syntax-check.
+	Suggested by Reuben Thomas.
+
+2011-01-26  Jim Meyering  <meyering@redhat.com>
+
+	maint: remove unneeded #include directives
+	* lib/savedir.c: Don't include <stddef.h>.  Not needed.
+	* src/dfa.c: Likewise.
+
+2011-01-22  Jim Meyering  <meyering@redhat.com>
+
+	build: avoid new syntax-check failures
+	* .x-sc_bindtextdomain: New file, used to avoid a spurious
+	failure from the new syntax-check rule.
+	* NEWS: Remove a trailing space.
+
+2011-01-19  Jim Meyering  <meyering@redhat.com>
+
+	tests: add a known-to-fail test
+	* tests/turkish-I: New test.
+	* tests/Makefile.am (TESTS): Add it.
+	(XFAIL_TESTS): Add here, too.
+	Reported by Ilya Basin.
+
+	maint: sort test names in Makefile.am
+	* tests/Makefile.am (TESTS): Sort test names.
+
+2011-01-05  Jim Meyering  <meyering@redhat.com>
+
+	doc: remove erroneous "{,m}" item from grep man page
+	* doc/grep.in.1: Remove item describing bogus {,m} regex notation.
+	Reported by Fernando Basso.
+
+2011-01-03  Jim Meyering  <meyering@redhat.com>
+
+	maint: update copyright year ranges to include 2011
+	Run "make update-copyright", so "make syntax-check" works in 2011.
+
+	build: update gnulib submodule to latest
+
+2010-12-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	main: fix exit status on xmalloc failures
+	* NEWS: Update.
+	* src/main.c (main): Set exit_failure.  Reported by Guy Shaw.
+
+	add comment above fn_grep
+	* configure.ac (fn_grep): Add comment suggested by Bruno Haible.
+
+2010-11-14  Paolo Bonzini  <bonzini@gnu.org>
+
+	grep: add include guards
+	* src/system.h: Add multiple inclusion guards.
+	* src/grep.h: Likewise.
+
+	configure: fix M4 quotation
+	* configure.ac: Add extra brackets around [...] patterns.
+
+	configure: remove dependency on grep that supports long lines and -e
+	* configure.ac (fn_grep): New.  Set GREP and EGREP to it, replace
+	with newly-built grep before AC_OUTPUT.  Reported by Florin Iucha
+	<http://savannah.gnu.org/bugs/?31646>.
+
+2010-11-04  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib to latest
+
+	tests: don't hard-code a 5-second timeout; that's not always enough
+	Instead, time the command in the C locale and use 10 times that
+	duration -- rounded up to whole seconds -- as the timeout when running
+	it in the UTF-8 locale.
+	* tests/backref-multibyte-slow: Compute a performance-relative timeout.
+	Reported by Gilles Espinasse, regarding an imac 400.  For more details,
+	see http://thread.gmane.org/gmane.comp.gnu.grep.bugs/3360
+
+2010-10-09  Jim Meyering  <meyering@redhat.com>
+
+	maint: describe policy on copyright year number ranges
+	* README: Mention coreutils' long-standing policy on use of M-N
+	ranges in copyright year lists.  Requested by Richard Stallman.
+
+2010-10-04  Dmitry V. Levin  <ldv@altlinux.org>
+
+	build: compile gnulib without -Wcast-align to avoid warnings on ARM
+	* configure.ac (GNULIB_WARN_CFLAGS): Remove -Wcast-align.
+
+2010-09-30  Jim Meyering  <meyering@redhat.com>
+
+	maint: don't define a gpg_key_ID.  now it's obtained automatically
+	* cfg.mk (gpg_key_ID): Remove definition.  No longer needed.
+
+2010-09-23  Paolo Bonzini  <bonzini@gnu.org>
+
+	tests: add testcase for previous fix
+	* tests/inconsistent-ranges: New.
+	* tests/Makefile.am (TESTS): Add it.
+
+2010-09-23  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: process range expressions consistently with system regex
+	The actual meaning of range expressions in glibc is not exactly strcoll,
+	which makes the behavior of grep hard to predict when compiled with the
+	system regex.  Leave to the system regex matcher the decision of which
+	single-byte characters are matched by a range expression.
+
+	This partially reverts a change made in commit 0d38a8bb (which made
+	sense at the time, but not now that src/dfa.c is not doing multibyte
+	character set matching anymore).
+
+	* src/dfa.c (in_coll_range): Remove.
+	(parse_bracket_exp): Use system regex to find which single-char
+	bytes match a range expression.
+
+2010-09-23  Bruno Haible  <bruno@clisp.org>
+
+	build: fix link error on systems that have libiconv but not libintl
+	* src/Makefile.am (LDADD): Add $(LIBICONV).
+
+2010-09-21  Jim Meyering  <meyering@redhat.com>
+
+	build: avoid compilation failure on the Hurd
+	* src/dfasearch.c (dfawarn): Rename enum symbols to use DW_ prefix,
+	so as not to collide with "GNU", which is defined by the Hurd.
+	Reported by Matthias Lanzinger in http://savannah.gnu.org/bugs/?31096
+
+2010-09-20  Jim Meyering  <meyering@redhat.com>
+
+	maint: avoid obsolete gnulib modules
+	* bootstrap.conf (gnulib_modules): Don't use obsolete atexit module.
+	Use malloc-gnu and realloc-gnu -- malloc and realloc are obsolete.
+
+	maint: update README-release
+	* README-release: Reflect changes in coreutils' version of this file.
+
+2010-09-20  Aharon Robbins  <arnold@skeeve.com>
+
+	dfa: fix compilation when not using MBS
+	* src/dfa.c (prepare_wc_buf) [!MBS_SUPPORT]: Do not compile this
+	function.
+
+2010-09-16  Jim Meyering  <meyering@redhat.com>
+
+	post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.7
+	* NEWS: Record release date.
+
+2010-09-13  Paolo Bonzini  <bonzini@gnu.org>
+
+	tests: add equiv-classes
+	* configure.ac (USE_INCLUDED_REGEX): Add Automake conditional.
+	* tests/equiv-classes: New test.
+	* tests/Makefile.am (TESTS): Add it.
+	(XFAIL_TESTS) [USE_INCLUDED_REGEX]: Mark it as expected failure.
+
+2010-09-13  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: fall back to glibc matcher if a MBCSET is found
+	This patch enables full support of equivalence classes and multicharacter
+	collation symbols.  It can also improve performance problems in some
+	cases for multibyte grep.  Both of these changes however depend on the
+	glibc version installed in the system.
+
+	For UTF-8 it will trigger only in the presence of MBCSET, e.g. [a-z].
+	For other character sets all brackets and `.` as well will trigger it.
+
+	* NEWS: Document this.
+	* src/dfa.c (dfaexec): Fall back to glibc for multibyte matches,
+	if possible.
+
+2010-09-13  Paolo Bonzini  <bonzini@gnu.org>
+
+	build: update gnulib submodule to latest
+	This is done to include commit "regex: Pass the system regex if its only
+	problem is 32-bit regoff_t".
+
+	* gnulib: Update to e2b0e1a.
+
+2010-09-12  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule to latest
+
+	tests: update init.sh from gnulib
+	* tests/init.sh: Update from gnulib.
+
+2010-09-08  Patrick Boyd  <pboyd04@gmail.com>
+
+	dfa: reduce stack usage
+	* src/dfa.c (dfaanalyze): Allocate GRPS and LABELS arrays from heap,
+	not on the stack.  With this change, grep can now run in these UEFI
+	simulators:
+	http://sourceforge.net/apps/mediawiki/tianocore/index.php?title=EDK
+	http://sourceforge.net/apps/mediawiki/tianocore/index.php?title=EDK2
+
+2010-09-08  Jim Meyering  <meyering@redhat.com>
+
+	tests/portability: avoid spurious failure with OpenBSD's /bin/sh
+	* tests/warn-char-classes: Don't use "set -x" here.  It causes
+	a spurious test failure on openbsd 4.7 when using its /bin/sh,
+	since the command, /bin/sh -xc 'P=1 : 2> err' emits "P=1" into err.
+	To enable set -x, run the test with "VERBOSE=yes", e.g.,
+	make check -C tests TESTS=warn-char-classes VERBOSE=yes
+
+2010-09-07  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule to latest
+
+2010-09-03  Jim Meyering  <meyering@redhat.com>
+
+	tests: remove .sh suffix from remaining test scripts.
+	* tests/backref: Rename from backref.sh.
+	* tests/bre: Rename from bre.sh.
+	* tests/ere: Rename from ere.sh.
+	* tests/file: Rename from file.sh.
+	* tests/khadafy: Rename from khadafy.sh.
+	* tests/options: Rename from options.sh.
+	* tests/pcre: Rename from pcre.sh.
+	* tests/spencer1: Rename from spencer1.sh.
+	* tests/spencer2: Rename from spencer2.sh.
+	* tests/status: Rename from status.sh.
+	* tests/yesno: Rename from yesno.sh.
+	* tests/Makefile.am: Reflect renamings.
+
+	tests: convert remaining tests to use init.sh
+	* tests/file.sh: Use init.sh. Use Exit, not exit. Use grep, not ${GREP}.
+	* tests/khadafy.sh: Likewise.
+	* tests/options.sh: Likewise.
+	* tests/spencer1.sh: Likewise.
+	* tests/spencer2.sh: Likewise.
+	* tests/status.sh: Likewise.
+	* tests/spencer1.awk: Use grep, not ${GREP}.
+	Don't ignore failure to generate intermediate shell script.
+	* tests/Makefile.am (CLEANFILES): Remove altogether, now that
+	all tests use init.sh.
+	(TESTS_ENVIRONMENT): Don't set GREP.  It's no longer used.
+
+	tests: remove warning.sh
+	* tests/warning.sh: Remove file.  All it did was print a warning.
+	* tests/Makefile.am (TESTS): Remove warning.sh.
+
+	tests: convert pcre.sh to use init.sh
+	* tests/pcre.sh: Use init.sh. Use Exit, not exit. Use grep, not ${GREP}.
+
+	tests: convert bre.sh to use init.sh
+	* tests/bre.sh: Use init.sh.
+	Use Exit, not exit.
+	Use "$abs_top_srcdir/tests/", not "$srcdir/" to specify inputs.
+	Source generated bre.script, rather than invoking $SHELL.
+	* tests/ere.sh: Likewise.
+	* tests/bre.awk: Use grep, not ${GREP}.
+	* tests/ere.awk: Likewise.
+	* tests/Makefile.am (CLEANFILES): Remove bre.script and ere.script.
+
+	tests: convert to use init.sh
+	* tests/yesno.sh: Use init.sh.
+	Use Exit, not exit.
+	Use grep, not $GREP.
+	* tests/backref.sh: Likewise.
+	* tests/Makefile.am (CLEANFILES): Remove yesno.txt.
+
+	build: update gnulib submodule to latest
+
+	build: update build/test tools from gnulib
+	* bootstrap: Update from gnulib.
+	* tests/init.sh: Likewise.
+
+2010-09-01  Jim Meyering  <meyering@redhat.com>
+
+	maint: add lib/version-etc.c to the list in POTFILES.in
+	* po/POTFILES.in: Add lib/version-etc.c.
+
+2010-09-01  Jim Meyering  <meyering@redhat.com>
+
+	grep: diagnose and exit-2 for bogus REs like [:space:], [:digit:], etc.
+	When I make a mistake like this:
+	  grep '[:lower:]' ...
+	be it in a script or on the command line, I want to know about
+	it as soon as possible.  I don't want grep to print a mere warning
+	that it is interpreting this suspicious and almost guaranteed-wrong
+	regular expression as a set of just 6 bytes.  And I certainly don't
+	want grep to silently do the wrong thing, even if that would be
+	officially standards-conforming.  It's obvious that I intended
+	[[:lower:]], and I want my error to be diagnosed in a way that is
+	most likely to get my attention.  Thus, with this change, grep now
+	prints a diagnostic and exits with status 2 the moment it
+	encounters an offending [:char_class:] construct.
+
+	This changes the way grep works by default, rather than
+	putting this new behavior on an option.  A new option
+	would seldom be used in scripts (not portable), and would
+	probably be used only rarely by those who need it the most.
+	This new functionality provides a valuable safety measure
+	and incurs truly negligible risk.
+
+	For strict POSIX compliance, set POSIXLY_CORRECT in
+	your environment.  That disables this new feature.
+
+	Revert the changes from commit 2cd3bcea, "grep: add
+	--warnings={always,never,auto}.", and then do the following:
+
+	* src/dfasearch.c (dfawarn): Call getenv("POSIXLY_CORRECT") here;
+	Remove "warning: " from the diagnostic, now that it's more than
+	a warning, and exit with status 2.
+	* NEWS (New features): Describe the new semantics.
+	* tests/warn-char-classes: Adjust one test to accommodate this change.
+	* doc/grep.texi (Character Classes and Bracket Expressions): Document.
+	(Environment Variables): Cross-reference it.
+	Remove reference to obsolete getopt illegal vs. invalid difference.
+	Thanks to Paul Eggert for suggestions and an initial prod.
+
+2010-08-30  Jim Meyering  <meyering@redhat.com>
+
+	maint: use gnulib's standard --version-printing code
+	This includes author names and keeps the copyright year up to date.
+	* bootstrap.conf (gnulib_modules): Add propername and version-etc-fsf.
+	* src/main.c (AUTHORS): Define.
+	(main): Use version_etc, rather than hard-coding the copyright text.
+	Prompted by a patch from Paolo Bonzini.
+
+2010-08-27  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: warn on [:space:] and similar
+	* src/dfa.c (parse_bracket_exp): Warn on regular expressions such as
+	[:space:].
+	* src/dfa.h (dfawarn): New prototype.
+	* src/dfasearch.c (dfawarn): New.
+	* NEWS: Document.
+
+	tests: add test for warnings
+	* tests/Makefile.am (TESTS): Add warn-char-class.
+	* tests/warn-char-class: New.
+
+	grep: add --warnings={always,never,auto}.
+	* src/grep.h (no_warnings): New declaration.
+	* src/main.c (no_warnings): New.
+	(WARNINGS_OPTION): Add to enum.
+	(main): Add --warnings.  Handle color_option == 2 together with it.
+
+	tests: add failing test for grep from a directory
+	* tests/Makefile.am (TESTS, XFAIL_TESTS): Add grep-dir.
+	* tests/grep-dir: New.
+
+	tests: add test for previous commit
+	* tests/Makefile.am (TESTS): Add grep-dev-null.
+	* tests/grep-dev-null: New.
+
+	search: fix "grep -Fif /dev/null"
+	* bootstrap.conf: Include gnulib module minmax.
+	* src/searchutils.c (mbtolower): Handle *N == 0 case.
+	* src/system.h: Include minmax.h from gnulib.
+
+2010-08-27  Adam Katz  <savannah@kopis.com>
+
+	Remove declaration after statement in dfa.c
+	* dfa.c (dfaexec): Declare saved_end at the beginning of the function.
+
+2010-08-13  Jim Meyering  <meyering@redhat.com>
+
+	make --include=FILE work once again
+	The semantics of excluded_file_name changed (when operating on
+	an "included" file name list).
+	* src/main.c (main): Adjust for changed semantics of excluded_file_name
+	simply by removing a negation.
+	* NEWS (Bug fixes): Mention this fix.
+	* tests/include-exclude: Add a test for this.
+	Reported by Joe Perches in http://savannah.gnu.org/bugs/?29876.
+
+2010-07-16  Paolo Bonzini  <bonzini@gnu.org>
+
+	doc: document \s and \S
+	* doc/grep.texi (The Backslash Character and Special Expressions):
+	Document \s and \S escapes.
+
+2010-05-29  Karl Berry  <karl@gnu.org>
+
+	doc: discuss matches that span two or more lines
+	* doc/grep.texi (Usage): Discuss matching across lines.
+	(Character Classes and Bracket Expressions) <[:space:]>: refer to it.
+
+2010-05-25  Jim Meyering  <meyering@redhat.com>
+
+	build: use latest gettext: 0.18
+	* configure.ac: Use gettext-0.18.
+	* bootstrap.conf (gnulib_modules): Use gettext-h, not gettext.
+	since the latter drags in a depedency on gettext 0.18.
+	Suggested by Bruno Haible.
+
+	maint: update helper scripts from gnulib
+	* tests/init.sh: Update from gnulib.
+	* bootstrap: Likewise.
+
+	build: update gnulib submodule to latest
+
+	maint: don't emit an extra newline in each of two diagnostics
+	* src/main.c (context_length_arg, grepdir): Remove a stray \n in
+	each of two diagnostics.
+
+2010-05-24  Bruno Haible  <bruno@clisp.org>
+
+	search: Avoid out-of-bounds access.
+	* src/dfasearch.c (EGexecute): Avoid access beyond end of buffer
+	that could happen if start != beg - buf.
+
+2010-05-23  Aharon Robbins  <arnold@skeeve.com>
+
+	dfa: fix signedness warnings
+	* src/dfa.c (dfaexec): Cast p when passing it to prepare_wc_buf.
+
+2010-05-09  Jim Meyering  <meyering@redhat.com>
+
+	tests: update init.sh
+	* tests/init.sh: Update from gnulib.
+
+	tests: normalize init.sh-sourcing code
+	* tests/backref-multibyte-slow: Use one-line idiom.
+	* tests/backref-word: Likewise.
+	* tests/case-fold-backref: Likewise.
+	* tests/case-fold-backslash-w: Likewise.
+	* tests/case-fold-char-class: Likewise.
+	* tests/case-fold-char-range: Likewise.
+	* tests/case-fold-char-type: Likewise.
+	* tests/char-class-multibyte: Likewise.
+	* tests/dfaexec-multibyte: Likewise.
+	* tests/empty: Likewise.
+	* tests/euc-mb: Likewise.
+	* tests/fedora: Likewise.
+	* tests/fgrep-infloop: Likewise.
+	* tests/fmbtest: Likewise.
+	* tests/foad1: Likewise.
+	* tests/ignore-mmap: Likewise.
+	* tests/include-exclude: Likewise.
+	* tests/max-count-vs-context: Likewise.
+	* tests/pcre-z: Likewise.
+	* tests/prefix-of-multibyte: Likewise.
+	* tests/reversed-range-endpoints: Likewise.
+	* tests/sjis-mb: Likewise.
+	* tests/spencer1-locale: Likewise.
+	* tests/word-delim-multibyte: Likewise.
+	* tests/word-multi-file: Likewise.
+
+	tests: update help-version
+	* tests/help-version: Update from coreutils.
+
+2010-05-06  Jim Meyering  <meyering@redhat.com>
+
+	tests: enable glibc's malloc-perturbing option
+	* tests/Makefile.am (MALLOC_PERTURB_): Define, in case it's not already
+	set in your environment.
+	(TESTS_ENVIRONMENT): Propagate MALLOC_PERTURB_ setting to test scripts.
+
+2010-05-06  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: speed up [[:digit:]] and [[:xdigit:]]
+	There's no "multibyte pain" in these two classes, since POSIX
+	and ISO C99 mandate their contents.
+
+	Time for "./grep -x '[[:digit:]]' /usr/share/dict/linux.words"
+	Before: 1.5s, after: 0.07s.  (sed manages only 0.5s).
+
+	* src/dfa.c (predicates): Declare struct dfa_ctype separately
+	from definition.  Add sb_only.
+	(find_pred): Return const struct dfa_ctype *.
+	(parse_bracket_exp): Return const struct dfa_ctype *.  Do
+	not fill MBCSET for sb_only character types.
+
+2010-05-05  Jim Meyering  <meyering@redhat.com>
+
+	tests: readability: use awk rather than obfuscated sed
+	* tests/backref-multibyte-slow: Generate input using an awk for-loop
+	rather than expensive and harder-to-read sed pipes.
+	Remove stray "set -x" and "wc -l in".
+
+	dfa: avoid segfault when processing an invalid multi-byte sequence
+	* src/dfa.c (dfaexec): Handle the cases in which mbrtowc returns
+	(size_t)-1 or (size_t)-2, rather than setting mblen_buf[i] to an
+	outrageously large value.
+
+2010-05-05  Paolo Bonzini  <bonzini@gnu.org>
+
+	grep: remove redundant syntax bit
+	* grep.c (Gcompile): Remove RE_HAT_LISTS_NOT_NEWLINE.
+
+	tests: add test for newly-fixed performance problem
+	* tests/backref-multibyte-slow: New.
+	* tests/Makefile.am: Add it.
+
+2010-05-05  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: convert to wide character line-by-line
+	This provides a nice speedup for -m in general, but especially
+	it avoids quadratic complexity in case we have to go to glibc.
+
+	* NEWS: Document change.
+	* src/dfa.c (prepare_wc_buf): Extract out of dfaexec.  Convert
+	only up to the next newline.
+	(dfaexec): Exit multibyte processing loop if past buf_end.
+	Call prepare_wc_buf again after processing a newline.
+
+2010-05-01  Jim Meyering  <meyering@redhat.com>
+
+	maint: remove useless #if HAVE_STDLIB_H
+	* src/mbsupport.h: Don't test HAVE_STDLIB_H.
+
+2010-04-20  Jim Meyering  <meyering@redhat.com>
+
+	dfa: don't #ifdef-out member declarations
+	* src/dfa.c (struct dfa): Remove "#if MBS_SUPPORT" guard that made
+	several member declarations conditional on this cpp definition.
+	(token): Likewise.
+	Reported by Anders Wallin.
+
+	tests: ensure that the --mmap option is ignored
+	* tests/ignore-mmap: New file.
+	* tests/Makefile.am (TESTS): Add it.
+	Reported by Jaroslav Škarvada in <http://savannah.gnu.org/bugs/?29614>
+
+2010-04-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: honor RE_DOT_NEWLINE and RE_DOT_NOT_NULL in UTF-8 period optimization
+	* src/dfa.c (add_utf8_anychar): Check for RE_DOT_NEWLINE and
+	RE_DOT_NOT_NULL.
+
+	grep: fix --mmap not being ignored
+	* NEWS: Document bugfix.
+	* main.c (main): Ignore MMAP_OPTION.
+
+2010-04-19  Jim Meyering  <meyering@redhat.com>
+
+	maint: avoid syntax-check failure due to indentation via TABs
+	* src/dfa.c (atom): Expand TABs in indentation.
+
+	build: update gnulib submodule to latest
+
+	maint: restrict scope of two globals to dfasearch.c
+	* src/dfasearch.c (patterns, pcount): Declare these file-scoped
+	globals to be static.
+
+2010-04-19  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: optimize UTF-8 period
+	* NEWS: Document improvement.
+	* src/dfa.c (struct dfa): Add utf8_anychar_classes.
+	(add_utf8_anychar): New.
+	(atom): Simplify if/else nesting.  Call add_utf8_anychar for ANYCHAR
+	in UTF-8 locales.
+	(dfaoptimize): Abort on ANYCHAR.
+
+	dfa: drop ORTOP
+	* src/dfa.c (token, prtok, addtok_mb, nsubtoks, dfaanalyze, dfamust):
+	Remove ORTOP.
+	(regexp): Remove parameter, always add OR at the end, adjust callers.
+	(atom): Adjust caller.
+	(dfaparse): Adjust caller.  Always add OR at the end.
+
+	dfa: fix {0,0}
+	* NEWS: Document change.
+	* src/dfa.c (struct dfa): Remove "broken" field.
+	(lex): Do not set it.
+	(closure): On {0,0}, backup and lex another closure without
+	adding a CAT.
+	(dfabroken): Remove.
+	* src/dfa.h (dfabroken): Remove.
+	* tests/spencer1.tests: Add testcases for {m,n}.
+
+	dfa: simplify dfainit
+	* src/dfa.c (dfainit): Use memset.
+
+2010-04-17  Jim Meyering  <meyering@redhat.com>
+
+	doc: fix a nit in HACKING
+	* HACKING: Correct size of .git/ dir: 9MB, not 30MB.
+
+	tests: add an expected-to-fail test using \< in a multi-byte locale
+	* tests/word-delim-multibyte: New test.  Currently failing.
+	* tests/Makefile.am (TESTS): Add it.
+	(XFAIL_TESTS): Define, temporarily.
+	Reported by Jaroslav Škarvada in http://savannah.gnu.org/bugs/?29537.
+
+2010-04-16  Paolo Bonzini  <bonzini@gnu.org>
+
+	test: cover just-fixed bug
+	* tests/empty: Test -Fw too.
+
+	grep: fix matching the empty string with grep -Fw
+	* NEWS: Document fix.
+	* src/kwsearch.c (Fexecute): The empty string is a valid match if it is
+	a whole word.
+
+2010-04-15  Jim Meyering  <meyering@redhat.com>
+
+	maint: update init.sh and HACKING
+	* HACKING: Sync from coreutils.
+	* tests/init.sh: Update from gnulib.
+
+2010-04-13  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule to latest; adapt
+	* COPYING: Remove empty line.
+	* README: Likewise.
+	* doc/fdl.texi: Likewise.
+	* tests/backref-word: Likewise.
+
+2010-04-11  Stefano Lattarini  <stefano.lattarini@gmail.com>
+
+	tests: accept the Debian timeout program
+	* tests/init.cfg: test timeout with `timeout 10s true'
+
+2010-04-08  Jim Meyering  <meyering@redhat.com>
+
+	dfa: convert "cannot happen" code/comment to use assert
+	* src/dfa.c (dfamust): There were numerous "cannot happen" comments,
+	some associated with "if (expr) goto done;".  Replace each with an
+	equivalent "assert (!expr);".
+
+	build: use gnulib's isblank module
+	* bootstrap.conf (gnulib_modules): Use gnulib's isblank module,
+	now that we rely on the function by that name.
+
+	maint: undo TAB-conversion change to gl/lib/*.c.diff
+	This fixes a bootstrap failure due to the patches not applying.
+	* .x-sc_prohibit_tab_based_indentation: Add ^gl/lib/.*\.c\.diff$
+	* gl/lib/regcomp.c.diff: Revert today's TAB->space change.
+	* gl/lib/regex_internal.c.diff: Likewise.
+	* gl/lib/regexec.c.diff: Likewise.
+
+2010-04-08  Arnold D. Robbins  <arnold@skeeve.com>
+
+	dfa: fix declaration of dfabroken in dfa.h
+	* dfa.h (dfabroken) [GAWK]: Fix declaration to match that in dfa.c.
+
+2010-04-08  Jim Meyering  <meyering@redhat.com>
+
+	maint: add syntax-check rule to enforce the new no-leading-TABs policy
+	* cfg.mk (sc_prohibit_tab_based_indentation): New rule, from coreutils.
+	(sc_prohibit_emacs__indent_tabs_mode__setting): Likewise.
+	(old_NEWS_hash): Update.
+	* .x-sc_prohibit_tab_based_indentation: List exempt files.
+
+2010-04-08  Jim Meyering  <meyering@redhat.com>
+
+	convert all TABs to equivalent spaces in indentation
+	Using this file,
+
+	cat > leading-blank.exempt <<\EOF
+	(?:^|\/)ChangeLog[^/]*$
+	(?:^|\/)(?:GNU)?[Mm]akefile[^/]*$
+	\.(?:am|mk)$
+	EOF
+
+	run this command to convert all non-conforming leading white
+	space to be all spaces:
+
+	git ls-files \
+	  | pcregrep -vf leading-blank.exempt \
+	  | xargs pcregrep -l '^ *\t' \
+	  | xargs perl -MText::Tabs -ni -le \
+	    '$m=/^( *\t[ \t]*)(.*)/; print $m ? expand($1) . $2 : $_'
+
+2010-04-08  Jim Meyering  <meyering@redhat.com>
+
+	build: include cfg.mk in the distribution tarball
+	* Makefile.am (EXTRA_DIST): Add cfg.mk.
+
+2010-04-08  Jim Meyering  <meyering@redhat.com>
+
+	maint: Makefile.am tweak  (no semantic change)
+	* Makefile.am (EXTRA_DIST): List one per line.  Sort.
+
+	build: include cfg.mk in the distribution tarball
+	* Makefile.am (EXTRA_DIST): Add cfg.mk.
+
+2010-04-08  Jim Meyering  <meyering@redhat.com>
+
+	dfa: move definition of __attribute__ back into dfa.h
+	* src/dfa.c (__attribute__): Move definition back to...
+	* src/dfa.h: ... this file.  It is essential for non-gcc compilers.
+	Reported by Arnold Robbins.
+
+2010-04-07  Arnold D. Robbins  <arnold@skeeve.com>
+
+	dfa: move internals from dfa.h to dfa.c
+	* src/dfa.h: Move internals into dfa.c.
+	* src/dfa.c: The dfa internals are now totally local to this file.
+	(dfaalloc, dfamusts, dfabroken): New functions to access features.
+	* src/dfasearch.c (dfa): Change this global variable from struct to pointer.
+	Adapt to that change, and use new functions, dfamusts and dfaalloc.
+
+2010-04-07  Jim Meyering  <meyering@redhat.com>
+
+	mbtolower: avoid potential NULL-dereference
+	* src/searchutils.c: Include <assert.h>.
+	(mbtolower): Assert that 0 < *n, to avoid possibility of NULL-deref.
+	Remove dead increment.
+
+	maint: tell git to ignore more build products
+	* .gitignore: Also ignore results of "make ID" and "make tags".
+
+	build: update gnulib submodule to latest
+
+	tests: use init.sh consistently
+	* tests/euc-mb: Call "path_prepend_ ." on a line by itself,
+	and with a comment.  This makes it so all of the srcdir/init.sh
+	lines are consistent, project-wide, and so that the addition of "."
+	to PATH for this test is properly documented.
+	* tests/sjis-mb: Likewise.
+
+	maint: avoid new syntax-check failure, ...
+	...now that the sole use of xmalloc no longer matches the
+	regular expression used by the syntax-check rule.
+	* .x-sc_prohibit_xalloc_without_use: Exempt src/kwset.c.
+
+	grep: make kwset's obstack use xmalloc, not malloc
+	This insidious bug could make grep fail to diagnose a failed malloc,
+	and then proceed to dereference the resulting NULL pointer.
+	Note that this bug was unlikely ever to cause real trouble; without
+	the fix, grep would segfault upon OOM, now it exits with a diagnostic.
+	* src/kwset.c (malloc) [GREP]: Define without the "(s)" macro
+	parameter, so that unadorned uses of malloc are also mapped to xmalloc.
+	One such use is in the expansion of obstack_init.
+	Report and patch by Nelson H. F. Beebe, in
+	http://thread.gmane.org/gmane.comp.gnu.grep.bugs/2995
+
+	tests: improve help-version (sync from gzip's version)
+	* tests/help-version: Cross-check $VERSION and --version output.
+	* tests/Makefile.am (TESTS_ENVIRONMENT): Export VERSION=$(VERSION).
+
+2010-04-06  Jim Meyering  <meyering@redhat.com>
+
+	doc: update THANKS
+	* THANKS: Update.
+
+2010-04-06  Aharon Robbins  <arnold@skeeve.com>
+
+	build: avoid conflict with WCHAR definition from Cygwin's <windows.h>
+	* src/dfa.h (enum token): Remove the definition from this file.
+	Replace with a declaration and typedef.  Moved to ...
+	* src/dfa.c (enum token): ... here.
+	Reported by Corinna Vinschen.
+
+2010-04-06  Jim Meyering  <meyering@redhat.com>
+
+	doc: add HACKING
+	* HACKING: New file.  Copied from coreutils, with s/coreutils/grep/
+	and a few minor edits.
+
+2010-04-05  Jim Meyering  <meyering@redhat.com>
+
+	tests: pull fixed init.sh from gnulib
+	* tests/init.sh: Update from gnulib.
+
+	maint: fix new argmatch-related syntax-check failures
+	* configure.ac (ARGMATCH_DIE): Use usage(EXIT_FAILURE), not exit(1).
+	* po/POTFILES.in: Add lib/argmatch.c.
+
+	maint: update cfg.mk to work with gnulib's newer "make syntax-check"
+	* cfg.mk: Update to use new _sc_search_regexp interface.  Run this:
+	perl -pi -e 's/\b_prohibit_regexp\b/_sc_search_regexp/;'
+	-e 's/\bmsg=/halt=/; s/\bre=/prohibit=/;' cfg.mk
+	and then adjust backslashes so they still line up.
+
+	maint: update tests/init.sh from gnulib
+	This ensures that the explanation for any skipped or failed test
+	is printed on stderr, not buried in each .log file.
+	* tests/init.sh: Update from gnulib.
+	* tests/init.cfg (stderr_fileno_): Define to 9, to match the
+	literal 2>&9 in tests/Makefile.am
+
+	build: update gnulib submodule to latest
+
+2010-04-04  Jim Meyering  <meyering@redhat.com>
+
+	maint: use argmatch, for better --directories=INVAL diagnostics
+	Before, you'd see this:
+	  grep: unknown directories method
+
+	Now, you'll see this:
+	  grep: invalid argument `INVAL' for `--directories'
+	  Valid arguments are:
+	    - `read'
+	    - `recurse'
+	    - `skip'
+	  Usage: src/grep [OPTION]... PATTERN [FILE]...
+	  Try `src/grep --help' for more information.
+
+	* bootstrap.conf: Add argmatch.
+	* configure.ac: Define ARGMATCH_DIE and ARGMATCH_DIE_DECL.
+	* src/main.c (directories_type): Define.
+	(directories_args, directories_types) Define.
+	All of the above so we can...
+	(main): Use XARGMATCH.
+	(usage): Declare extern, now that argmatch calls it via ARGMATCH_DIE.
+
+2010-04-04  Jim Meyering  <meyering@redhat.com>
+
+	dfa.c: const correctness; and remove useless casts of realloc and malloc
+	* src/dfa.c (icatalloc, icpyalloc, istrstr, enlist): As above.
+	(inboth, dfamust, comsubs): Likewise.
+
+	dfa.c: use a better (unsigned) type for an index: int->unsigned int
+	* src/dfa.c (dfaexec): Use "unsigned int" for a logically unsigned index.
+
+	maint: style: use sizeof VAR, rather than sizeof TYPE, where possible
+	* src/dfa.c (copyset, zeroset): Prefer sizeof EXPR, over sizeof TYPE,
+	for improved readability/maintainability.
+	(equal, parse_bracket_exp, addtok_wc, dfaparse, dfaexec): Likewise.
+
+2010-04-02  Jim Meyering  <meyering@redhat.com>
+
+	dfa.c: use a better (unsigned) type for an index: int->size_t
+	* src/dfa.c (parse_bracket_exp): Use size_t as type of index, not int.
+
+	maint: const-correctness
+	* src/dfa.c (tstbit, copyset, equal, charclass_index): Declare read-only
+	"charclass" parameters to be "const".  No semantic change.
+
+	maint: include <wchar.h> and <wctype.h> unconditionally
+	* src/main.c: Include <wchar.h> and <wctype.h> unconditionally.
+	Their presence/usefulness are assured by gnulib.
+	* src/dfa.c: Likewise.
+	* src/search.h: Likewise.
+
+	maint: MBS_SUPPORT: define to 0/1, not undef/1
+	Prepare to remove many of these #ifdefs.
+	* src/mbsupport.h (MBS_SUPPORT): Define to 0/1, not undef/1.
+	Change each "#ifdef MBS_SUPPORT" to "#if MBS_SUPPORT".  Use this:
+	perl -pi -e 's/ifdef (MBS_SUPPORT)/if $1/' $(g grep -l ifdef.MBS_SUPPO)
+	* src/dfa.c: s/#ifdef MBS_SUPPORT/#if MBS_SUPPORT/
+	* src/dfa.h: Likewise.
+	* src/dfasearch.c: Likewise.
+	* src/kwsearch.c: Likewise.
+	* src/main.c: Likewise.
+	* src/search.h: Likewise.
+	* src/searchutils.c: Likewise.
+
+2010-04-02  Jim Meyering  <meyering@redhat.com>
+
+	maint: use STREQ in place of strcmp
+	perl -pi -e 's/\bstrcmp *\((.*?)\) == 0/STREQ ($1)/' src/main.c
+	perl -pi -e 's/\bstrcmp *\((.*?)\) != 0/!STREQ ($1)/' src/main.c
+
+	* src/dfa.c (STREQ): Define.
+	Use it instead of strcmp.
+	* src/main.c (STREQ): Likewise.
+	* cfg.mk (local-checks-to-skip): Remove sc_prohibit_strcmp,
+	to enable the strcmp-prohibition.
+
+2010-04-02  Jim Meyering  <meyering@redhat.com>
+
+	maint: enable the useless_cpp_parens syntax check
+	* cfg.mk (local-checks-to-skip): Remove sc_useless_cpp_parens.
+	* src/main.c (devices, fillbuf, exit_on_match): Remove useless parens.
+	(print_line_head, grepfile, set_limits, main): Likewise.
+	* src/vms_fab.h: Likewise.
+	* vms/config_vms.h: Likewise.
+	* src/mbsupport.h: Likewise.
+
+	cleanup and improvement: parse command line arguments consistently
+	* src/main.c: Include c-ctype.h, for this:
+	(prepend_args): Use c_isspace, not ISSPACE.
+	This is important so that we parse arguments consistently,
+	and independently of the current locale.
+	* bootstrap.conf (gnulib_modules): Add c-ctype.
+	* src/system.h: Remove IS* definitions here, too.
+	* src/dfasearch.c (WCHAR): Use isalnum, not ISALNUM.
+	* src/kwsearch.c (WCHAR): Likewise.
+	* src/searchutils.c (kwsinit): Use tolower, not TOLOWER.
+
+	cleanup: rely on gnulib's ctype.h functions; remove IS* macros and is_*
+	* src/dfa.c (setbit_case_fold, prednames): Use official names.
+	(IS_WORD_CONSTITUENT, lex): Likewise.
+	(ISALNUM, ISALPHA, ISCNTRL, ISDIGIT, ISGRAPH): Remove definitions.
+	(ISLOWER, ISPRINT, ISPUNCT, ISSPACE, ISUPPER, ISXDIGIT): Likewise.
+	(is_alnum, is_alpha, is_blank, is_cntrl, is_digit, is_graph): Likewise.
+	(is_lower, is_print, is_punct, is_space, is_upper, is_xdigit): Likewise.
+	(isgraph): Likewise.
+
+	build: update gnulib submodule to latest, and adjust
+	* src/main.c (parse_grep_colors): Adjust diagnostics not to trigger
+	the sc_error_message_period and sc_error_message_uppercase
+	syntax-check rules.
+
+	maint: remove all VMS-related code
+	* configure.ac (AC_CONFIG_FILES): Remove vms/Makefile
+	* Makefile.am (SUBDIRS): Remove vms.
+	* src/Makefile.am (EXTRA_DIST): Remove vms_fab.c and vms_fab.h.
+	* src/vms_fab.c, src/vms_fab.h, vms/make.com: Remove files.
+	* vms/Makefile.am, vms/README, vms/config_vms.h: Likewise.
+
+	post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.6.3
+	* NEWS: Record release date.
+
+2010-04-02  Jim Meyering  <meyering@redhat.com>
+
+	grep: avoid used-undefined error with truncated multibyte input
+	* src/dfa.c (addtok_wc): Don't use buf[0] (it's undefined) when
+	wcrtomb returns <= 0.
+
+	MBS_SUPPORT-removal: * src/dfa.c (dfastate):
+
+2010-04-01  Jim Meyering  <meyering@redhat.com>
+
+	maint: avoid unnecessary 2nd getenv("TERM")
+	* src/main.c (main): Don't call getenv("TERM") twice -- in the same
+	expression, even.
+
+	tests: remove all unportable uses of echo
+	* src/main.c: Use printf rather than echo -ne in a comment.
+	* tests/fedora: Use printf (not echo) also in ok/fail functions.
+	* cfg.mk (sc_prohibit_echo_minus_en): New rule, to prohibit
+	any future introduction.
+
+	tests: add explicit requirement for en_US.UTF-8
+	* tests/char-class-multibyte: Use require_en_utf8_locale_,
+	rather than open-coding it.
+	* tests/prefix-of-multibyte: Require the locale explicitly.
+	* tests/fgrep-infloop: Likewise.
+	This fixes test failures that would arise on systems without
+	that particular locale.  Reported by Ludovic Courtès.
+
+	tests: new function, to require an en_US UTF8 locale
+	* tests/init.cfg (require_en_utf8_locale_): New function.
+
+	tests: use printf, not echo -n, echo -e, or any combination
+	* tests/fedora: Using printf is more portable.
+
+	grep: remove unnecessary code
+	* src/main.c (print_line_middle): Now that we use RE_ICASE
+	(enabled in commit 70e23616, "dfa: rewrite handling of multibyte
+	case_fold lexing"), this case-conversion code is useless and wasteful.
+	Remove it.
+
+	doc: fix typo: s/AM_V_AT/AM_V_at/
+	* doc/Makefile.am (egrep.1 fgrep.1): The former has case consistent
+	with its sister variable, AM_V_GEN, but the latter is the one that
+	actually works.
+
+	doc: generated files are best made read-only, ...
+	...to minimize risk of accidentally modifying the generated file
+	rather than its template.  These are tiny, so no risk, but it's
+	a good to be consistent, so generated files are easier to spot.
+	* doc/Makefile.am (egrep.1 fgrep.1): When generating these files,
+	ensure that they too are created read-only.
+
+	doc: generate grep.1 from template
+	* doc/Makefile.am (grep.1): New rule.
+	(CLEANFILES): Add grep.1 to the list.
+	* .gitignore: Add /doc/grep.1
+	* doc/grep.in.1: Replace hard-coded "2.5.1-cvs" with @VERSION@.
+	Update copyright year list.
+	Omit the line-splitting \(co directive so that update-copyright
+	will perform future updates automatically.
+	Egmont Koblinger reported the outdated version string
+	and copyright year list in the man page:
+	http://savannah.gnu.org/bugs/?29390
+
+	doc: prepare to generate grep.1
+	* doc/grep.1: Rename to...
+	* doc/grep.in.1: ...this.
+
+2010-03-31  Eric Blake  <eblake@redhat.com>
+
+	build: avoid another warning
+	Noticed on cygwin:
+	get-mb-cur-max.c: In function 'main':
+	get-mb-cur-max.c:27: error: unused parameter 'argc' [-Wunused-parameter]
+
+	* tests/get-mb-cur-max.c (main): Use argc.
+
+2010-03-31  Paolo Bonzini  <bonzini@gnu.org>
+
+	tests: fix on systems with broken sh
+	* tests/Makefile.am (TESTS_ENVIRONMENT): Adjust coreutils remnants.
+	* tests/bre.sh: Invoke script with $SHELL if defined.
+	* tests/ere.sh: Likewise.
+	* tests/spencer1-locale: Likewise.
+	* tests/spencer1.sh: Likewise.
+
+	tests: improve empty test
+	* tests/empty: Add more tests, note expected failure.
+
+	tests: improve empty test with respect to locales
+	* tests/empty: Add tests for multiple locales.
+
+	grep: fix grep -F against empty string
+	* src/searchutils.c (is_mb_middle): Do not return true for empty matches
+	when p == buf.
+
+	tests: rename empty.sh to empty
+	* tests/empty.sh: Rename to...
+	* tests/empty: ... this.
+	* tests/Makefile.am (TESTS): Adjust.
+
+	tests: convert empty.sh to new style
+	* tests/empty.sh: Convert to init.sh, add 10-second timeout.
+
+	tests: use get-mb-cur-max in char-class-multibyte
+	* tests/char-class-multibyte: Use get-mb-cur-max to detect UTF-8 support.
+	Rewrite previous locale detection code as a grep test.
+
+	tests: fix -Wformat failure
+	* tests/get-mb-cur-max (main): Cast MB_CUR_MAX to int.
+
+2010-03-30  Jim Meyering  <meyering@redhat.com>
+
+	doc: add a "Reply-To" to the suggested announcement mail header
+	* README-release: Add "Reply-To" with the list address,
+	to minimize risk of replies to the other announcement recipients.
+	Suggestion from Eric Blake.
+
+2010-03-29  Jim Meyering  <meyering@redhat.com>
+
+	build: avoid compiler warning when building test program
+	* tests/Makefile.am (AM_CPPFLAGS, AM_CFLAGS, AM_LDFLAGS): Define,
+	so that all the usual C compile-and-link machinery comes into play.
+	* tests/get-mb-cur-max.c: Include "progname.h".
+	Remove unnecessary inclusion of <ctype.h>.
+	Mike Frysinger reported the "implicit decl of set_program_name" warning.
+
+	build: detect PCRE support also when <pcre/pcre.h> is the header
+	* m4/pcre.m4: Also check for <pcre/pcre.h>.
+	* src/pcresearch.c: Include <pcre/pcre.h>, if needed.
+	Guard inclusions with HAVE_PCRE_H and HAVE_PCRE_PCRE_H, not HAVE_LIBPCRE.
+	* NEWS (Bug fixes): Mention it.
+	Dmitry V. Levin reported that PCRE support was not detected
+	on systems with <pcre.h> not in the default include path.
+
+	post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.6.2
+	* NEWS: Record release date.
+
+2010-03-29  Eric Blake  <eblake@redhat.com>
+
+	build: avoid warnings on cygwin
+	* lib/savedir.c (isdir): Avoid shadowing a declaration.
+	* src/main.c (get_nondigit_option): Cast away const to avoid
+	compiler warning.
+
+	maint: ignore new test executable
+	* .gitignore: Enhance.
+
+2010-03-29  Jim Meyering  <meyering@redhat.com>
+
+	doc: consolidate redundant-looking entries
+	* NEWS: Consolidate the two --include/exclude-related entries.
+	Suggested by Eric Blake.
+
+2010-03-29  Paolo Bonzini  <bonzini@gnu.org>
+
+	tests: use $(...) consistently
+	* tests/backref.sh: Use `...' instead of ``...'' in comments.
+	* tests/bre.awk: Use $(...) instead of `...`.
+	* tests/ere.awk: Use $(...) instead of `...`.
+	* tests/euc-mb: Use $(...) instead of `...`.
+	* tests/fmbtest: Use $(...) instead of `...`.
+	* tests/foad1: Use $(...) instead of `...`.
+	* tests/pcre-z: Use $(...) instead of `...`.  Quote output of grep.
+	* tests/spencer1-locale.awk: Use $(...) instead of `...`.
+	* tests/spencer1.awk: Use $(...) instead of `...`.
+	* tests/yesno.sh: Use $(...) instead of `...`.
+
+2010-03-29  Jim Meyering  <meyering@redhat.com>
+
+	build: make doc/Makefile.am cleaner and more robust
+	* doc/Makefile.am (egrep.1 fgrep.1): Generate robustly, i.e.,
+	do not redirect directly to $@.
+	Use $(AM_V_GEN).
+	Do not distribute intermediate files like fgrep.man and egrep.man.
+	Likewise, do not use them to generate their %.1 images.
+	Instead, generate the .1 files directly.
+
+2010-03-29  Paolo Bonzini  <bonzini@gnu.org>
+
+	tests: add program to detect locales
+	* tests/Makefile.am (check_PROGRAMS): Add get-mb-cur-max.
+	* tests/get-mb-cur-max.c: New.
+	* tests/euc-mb: Use it.  Fail if the former detection test fails.
+	* tests/sjis-mb: Use it.  Fail if the former detection test fails.  Expand
+	comments.
+
+2010-03-29  Paolo Bonzini  <bonzini@gnu.org>
+
+	tests: add tests for SJIS character sets
+	The attached test will be skipped unless (on a glibc system) you run
+	something like
+
+	  mkdir /usr/lib/locale/ja_JP.SHIFT_JIS
+	  zcat /usr/share/i18n/charmaps/SHIFT_JIS.gz | \
+	    localedef \
+	      -f - \
+	      -i /usr/share/i18n/locales/ja_JP \
+	      /usr/lib/locale/ja_JP.SHIFT_JIS
+
+	* tests/Makefile.am: Add sjis-mb.
+	* tests/sjis-mb: New.
+
+2010-03-29  Paolo Bonzini  <bonzini@gnu.org>
+
+	grep -F: fix a bug with SJIS character sets
+	Commit db9d6 would erroneously skip matches in SJIS character sets.  In
+	this character set low bytes (i.e. ASCII bytes) are also valid second
+	bytes in a double-byte character, so you have to continue looking for
+	a match, even if you match in the middle of a double-byte character.
+
+	* src/kwsearch.c: Ensure that beg is advanced by at least one byte,
+	but do not fail immediately after matching in the middle of a double-byte
+	character.
+
+2010-03-28  Bruno Haible  <bruno@clisp.org>
+
+	build: update after change in gnulib's lib-ignore module
+	* src/Makefile.am (AM_LDFLAGS): Define.  Use gnulib's new
+	$(IGNORE_UNUSED_LIBRARIES_CFLAGS).
+
+2010-03-28  Jim Meyering  <meyering@redhat.com>
+
+	tests: disable new texinfo-acronym syntax-check from gnulib
+	* cfg.mk (local-checks-to-skip): Add new sc_texinfo_acronym, to skip it.
+
+2010-03-28  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	tests: exercise fix for improper match of incomplete MB char prefix
+	* tests/prefix-of-multibyte: New file.
+	* tests/Makefile.am (TESTS): Add it.
+
+2010-03-28  Jim Meyering  <meyering@redhat.com>
+
+	grep -F: fix a multi-byte erroneous-match-in-middle bug
+	Just as Perl prints nothing in this case,
+	  printf '\357\274\241\n' | perl -CIO -lne '/\357/ and print'
+
+	grep should also print nothing when used as follows.
+	However, these would mistakenly match with grep prior to 2.6.2:
+	  printf '\357\274\241\n' | LC_ALL=en_US.UTF-8 src/grep -F $'\357'
+	  printf '\357\274\241\n' | LC_ALL=en_US.UTF-8 src/grep -F $'\357\274'
+
+	* src/searchutils.c (is_mb_middle): New parameter: the length of the
+	match, in bytes, as determined by kwsexec.  Use this to detect when
+	the nominal match found by kwsexec must be skipped because it is for
+	an incomplete multi-byte character that is a prefix of a character
+	in the input.
+	* src/dfasearch.c (EGexecute): Update caller.
+	* src/kwsearch.c (Fexecute): Likewise.
+	* src/search.h: Update prototype.
+	* NEWS (Bug fixes): Mention it.
+	Report and analysis by Norihiro Tanaka.
+
+2010-03-28  Norihiro Tanaka  <noritnk@kcn.ne.jp>
+
+	tests: add tests for the fgrep-infloop bug
+	* tests/init.cfg (require_timeout_): New function.
+	* tests/fgrep-infloop: New file.  Test for the above fix.
+	* tests/Makefile.am (TESTS): Add it.
+
+2010-03-28  Jim Meyering  <meyering@redhat.com>
+
+	grep -F: avoid infinite loop when searching for incomplete MB character
+	Searching for an incomplete non-prefix of a multi-byte character
+	should find no match.
+
+	  Just as these print nothing,
+	    printf '\357\274\241\357\274\241\n' \
+	      | perl -CIO -ne '/\241\357/ and print'
+	    printf '\357\274\241\n' | perl -CIO -ne '/\274\241/ and print'
+	    printf '\357\274\241\n' | perl -CIO -ne '/\241/ and print'
+	    printf '\357\274\241\n' | perl -CIO -ne '/\274/ and print'
+
+	  These should also print nothing, but with grep-2.6 and grep-2.6.1,
+	  they would infloop:
+	    printf '\357\274\241\n' | LC_ALL=en_US.UTF-8 src/grep -F $'\241'
+	    printf '\357\274\241\n' | LC_ALL=en_US.UTF-8 src/grep -F $'\274'
+	    printf '\357\274\241\n' | LC_ALL=en_US.UTF-8 src/grep -F $'\274\241'
+
+	* src/kwsearch.c (Fexecute): Don't infloop when searching for
+	an incomplete non-prefix part of a multi-byte character.
+	* NEWS (Bug fixes): Mention it.
+	Reported and diagnosed by Norihiro Tanaka.
+
+2010-03-28  Jim Meyering  <meyering@redhat.com>
+
+	tests: rename: fmbtest.sh -> fmbtest
+	* tests/fmbtest.sh: Rename to ...
+	* tests/fmbtest: ...this, dropping the .sh suffix.
+	* tests/Makefile.am (TESTS): Reflect renaming.
+
+	tests: convert fmbtest.sh to use init.sh
+	* tests/fmbtest.sh: Use init.sh and adapt accordingly:
+	Use "grep", not ${GREP}.  Use Exit, not exit.
+
+	tests: also exercise the --include + glob path
+	* tests/include-exclude: Exercise Javier's fix.
+
+2010-03-28  Javier Villavicencio  <the_paya@gentoo.org>
+
+	grep -r: fix --include with globs, too
+	The previous fix addressed only the non-glob case.
+	* src/main.c (main): Use add_exclude's EXCLUDE_WILDCARDS option,
+	to enable the use of fnmatch with --include=GLOB.
+	gnulib: Update to latest, for the fixed exclude.c.
+
+2010-03-28  Jim Meyering  <meyering@redhat.com>
+
+	grep -r: fix --include with non-globs
+	* lib/savedir.c (savedir): Fix logic error.  Introduced by commit
+	bf3bd92c, "build: adapt to the newer exclude API we now get from gnulib"
+	* tests/include-exclude: Test for this bug by exercising --include, too.
+	* NEWS (Bug fixes): Mention it.
+	Reported by Philipp Kohlbecher in http://savannah.gnu.org/bugs/?29358
+
+2010-03-27  Jim Meyering  <meyering@redhat.com>
+
+	kwset: correct comments; require non-NULL kwsmatch argument
+	* src/kwset.c (kwsexec): Correct comments.  This function has been
+	returning an offset, not a pointer, for 9 years.
+	Do not test for kwsmatch == NULL.  All callers pass non-NULL.
+	(cwexec): Likewise.
+	* src/kwset.h (kwsexec): Mark the 4th parameter, kwsmatch, as non-NULL.
+	Include "arg-nonnull.h".
+
+	build: add -I$(top_builddir)/lib so we also find generated .h files
+	* src/Makefile.am (AM_CPPFLAGS): Rename from INCLUDES to avoid
+	warning from automake -Wall.
+	Add -I$(top_builddir)/lib, so we find generated .h files like
+	getopt.h in a non-srcdir build.
+
+	build: remove superfluous LOCALEDIR definition
+	* src/Makefile.am (INCLUDES): Remove unnecessary definition of
+	LOCALEDIR here.  Now, it's defined via gnulib's configmake.h.
+	* src/system.h: Include "configmake.h" for its LOCALEDIR definition.
+
+	grep: don't segfault upon use of --include or --exclude* options
+	* lib/savedir.c (isdir1): Fix fatal typo: deref "dir" argument,
+	not the global (initially-NULL) "path".  Reported by Standish Parsley.
+	* tests/include-exclude: New file.
+	* tests/Makefile.am (TESTS): Add it.
+	* NEWS (Bug fixes): Mention it.
+
+2010-03-26  Jim Meyering  <meyering@redhat.com>
+
+	tests: rename: foad1.sh -> foad1
+	* tests/foad1.sh: Rename to ...
+	* tests/foad1: ...this, dropping the .sh suffix.
+	* tests/Makefile.am (TESTS): Reflect renaming.
+
+	tests: convert foad1.sh to use init.sh
+	This fixes a spurious test failure when "make check" is run with
+	certain envvars set, e.g., "make check GREP_COLOR=always"
+	* tests/foad1.sh: Use init.sh and adapt accordingly:
+	Use "grep", not ${GREP}.  Test VERBOSE against "yes", not "1",
+	to be consistent with init.sh.
+	Use Exit, not exit.
+	Reported by Nelson H. F. Beebe.
+
+	tests: insulate tests from envvar settings
+	* tests/init.cfg (vars_): Unset each envvar that can affect how
+	grep works.  This protects only those tests that have been
+	converted to use init.sh.
+
+2010-03-25  Eric Blake  <eblake@redhat.com>
+
+	maint: ignore 'make dist pdf' droppings
+	* .gitignore: Add more exemptions.
+
+2010-03-25  Jim Meyering  <meyering@redhat.com>
+
+	tests: avoid spurious test failure due to lack of a French UTF8 locale
+	* tests/init.cfg: New file.  If either $LOCALE_FR or $LOCALE_FR_UTF8
+	is set to "none", reset it to the empty string.
+	Reported by Mike Frysinger and Sven Joachim.
+	* tests/Makefile.am (EXTRA_DIST): Add init.cfg.
+
+	build: do not use pkg-config to test for PCRE support
+	* configure.ac: Do not use PKG_PROG_PKG_CONFIG or PKG_CHECK_MODULES.
+	Do not modify CPPFLAGS; that belongs to those who invoke make.
+	Instead, use autoconf's AC_CHECK_HEADERS and AC_SEARCH_LIBS via the
+	new macro, gl_FUNC_PCRE, defined in...
+	* m4/pcre.m4 (gl_FUNC_PCRE): New macro, to handle pcre-related
+	configure-time tests.
+	* src/Makefile.am (grep_LDADD): Use LIB_PCRE, not PCRE_LIBS.
+	* src/pcresearch.c: Test HAVE_LIBPCRE via "#if", not "#ifdef".
+	All other cpp tests of this symbol used "#if".
+	Prompted by a suggestion from Bruno Haible.
+	* NEWS (Build-related): Mention this.
+
+	doc: correct and amend NEWS entries for 2.6.1
+	* NEWS (Bug fixes): Correct character ranges bug description.
+	Add an example from Dmitry V. Levin.
+	Add that the word-with-backref bug was introduced in 2.5.1.
+	* cfg.mk (old_NEWS_hash): Update to match.
+
+	post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.6.1
+	* NEWS: Record release date.
+
+2010-03-25  Tony Abou-Assaleh  <taa@acm.org>
+
+	tests: use awk's -v option more portably
+	* tests/spencer1-locale: Add a space between awk's "-v" option and
+	the following VAR=value string, to avoid test failure on Mac OS X.
+
+2010-03-25  Norihirio Tanaka  <noritnk@kcn.ne.jp>
+
+	dfa/grep: fix compilation with MBS_SUPPORT
+	* src/dfa.c (cur_mb_len): Initialize to 1 and always make it available.
+	(setbit_case_fold): Do not use wint_t in prototype if !MBS_SUPPORT.
+	(parse_bracket_exp): Fix compilation with !MBS_SUPPORT.
+	* src/kwsearch.c (kwsinit): Do not use mbtolower and MB_CUR_MAX
+	if !MBS_SUPPORT.
+	* src/searchutils.c (kwsinit): Do not refer to MB_CUR_MAX if !MBS_SUPPORT.
+
+	* tests/char-class-multibyte: Skip if UTF-8 matching does not work.
+	* tests/fmbtest.sh: Likewise.
+
+2010-03-25  Jim Meyering  <meyering@redhat.com>
+
+	build: avoid warnings about unnecessary use of "return"
+	* src/grep.c (Gcompile, Ecompile, Acompile): Do not "return X"
+	from a function returning void, not even when X itself is a
+	function returning void.  This avoids warnings from Sun Studio 11
+	reported by Dagobert Michelsen.
+	* src/egrep.c (Ecompile): Likewise.
+
+2010-03-25  Norihirio Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: fix printing when -w is used and regex is needed for matching
+	* NEWS: Document bugfix.
+	* src/dfasearch.c (EGexecute): After assess_pattern_match len, is either
+	invalid or end-beg; jump to success.
+	* tests/Makefile.am (TESTS): Add new test.
+	* tests/backref-word: New.
+
+2010-03-25  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: fix single byte character ranges
+	* src/dfa.c (in_coll_range): Fix ordering for second strcoll.  Reported
+	by Dmitry V. Levin.
+	* tests/spencer1-locale.awk: Also test single-byte character sets.
+	* NEWS: Add a note about this bugfix.
+	* THANKS: Add Dmitry.
+
+2010-03-25  Norihirio Tanaka  <noritnk@kcn.ne.jp>
+
+	grep: reset state after truncated or invalid multibyte sequences
+	* src/searchutils.c (is_mb_middle): When treating an invalid sequence
+	or a truncated multibyte character as a single byte character, reset
+	mbstate
+
+	grep: do lowercase conversion in print_line_middle only for single-byte case
+	* src/main.c (print_line_middle): Restrict match_icase code
+	to MB_CUR_MAX == 1.  Adjust comments.
+
+2010-03-25  Jim Meyering  <meyering@redhat.com>
+
+	tests: provide framework_failure_ function
+	The shell function "framework_failure" was called in the unusual
+	event that some fundamental test set-up operation would fail.
+	However it was not defined.  Define it, but with a trailing underscore
+	to impinge less on the test writer's name space.  Adjust all uses.
+	* tests/init.sh (framework_failure_): New function.
+	* tests/case-fold-backref: s/framework_failure/framework_failure_/
+	* tests/case-fold-char-class: Likewise.
+	* tests/case-fold-char-range: Likewise.
+	* tests/case-fold-char-type: Likewise.
+	* tests/char-class-multibyte: Likewise.
+	* tests/dfaexec-multibyte: Likewise.
+	* tests/max-count-vs-context: Likewise.
+	* tests/word-multi-file: Likewise.
+
+2010-03-24  Jim Meyering  <meyering@redhat.com>
+
+	doc: tweak THANKS
+	* THANKS: Update Arnold's name and address, per request.
+
+	portability: use gnulib's lseek wrapper
+	* bootstrap.conf (gnulib_modules): Use gnulib's lseek wrapper,
+	for improved portability.  lseek does not fail with ESPIPE on
+	pipes on some systems.
+
+	build: avoid link failure on Solaris 8
+	* bootstrap.conf (gnulib_modules): Add wctob.
+	* NEWS (Portability): Mention this.
+	Reported by Dagobert Michelsen in <http://sv.gnu.org/bugs/?29325>.
+
+2010-03-24  Petr Písař  <petr.pisar@atlas.cz>
+
+	doc: translate new --help message
+	* src/main.c: Translate "after_options".
+
+2010-03-24  Jim Meyering  <meyering@redhat.com>
+
+	doc: NEWS make it clear that the bug was introduced in 2.6
+	* NEWS: Clarify.
+
+2010-03-24  Paolo Bonzini  <bonzini@gnu.org>
+
+	tests: fix char-class-multibyte
+	* tests/char-class-multibyte: Make it pass.
+
+2010-03-23  Jim Meyering  <meyering@redhat.com>
+
+	build: avoid compilation failure when MBS_SUPPORT not defined
+	* src/dfa.c (setbit_case_fold) [!MBS_SUPPORT]: Fix curly brace mismatch.
+
+2010-03-23  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: fix sigsegv on multibyte character classes
+	Reported by Jaroslav Škarvada <jskarvad@redhat.com>.  This is
+	unfortunate.  grep needs an automatic testcase generator.
+
+	* NEWS: Document bug.
+	* THANKS: Mention reporter.
+	* src/dfa.c (set_bit_casefold): Change type of first argument for
+	self-documentation.
+	(parse_bracket_exp): Fix call.
+	* tests/Makefile.am: Add new testcase.
+	* tests/char-class-multibyte: New testcase.
+
+2010-03-23  Jim Meyering  <meyering@redhat.com>
+
+	post-release administrivia
+	* NEWS: Add header line for next release.
+	* .prev-version: Record previous version.
+	* cfg.mk (old_NEWS_hash): Auto-update.
+
+	version 2.6
+	* NEWS: Record release date.
+
+	build: avoid warnings: tell gcc and clang that dfaerror never returns
+	* src/dfa.h (__attribute__): Define.
+	(dfaerror): Declare with the "noreturn" attribute.
+	* src/dfasearch.c (dfaerror): Add an unreachable use of abort.
+
+2010-03-22  Eric Blake  <eblake@redhat.com>
+
+	build: fix cygwin build
+	Portions of gnulib depend on -lintl, and cygwin does not allow
+	lazy linking.
+
+	* src/Makefile.am (LDADD): Include libraries in correct order.
+
+2010-03-22  Paolo Bonzini  <bonzini@gnu.org>
+
+	grep: remove --mmap
+	mmap is a bad idea for sequentially accessed file because it will cause
+	a page fault for every read page.  Just consider it a failed experiment,
+	and ignore --mmap while accepting it for backwards compatibility.
+
+	* configure.ac (AC_FUNC_MMAP): Remove.
+	* doc/grep.texi (Other options): Say --mmap is ignored.
+	* src/grep.c (mmap_option): Remove.
+	(long_options): Do not reference it.
+	(bufmapped, initial_bufoffset): Remove.
+	(reset, fillbuf): Remove HAVE_MMAP code.
+	(grepfile): Remove bufmapped reference.
+	(usage): Say --mmap is ignored.
+
+2010-03-22  Paolo Bonzini  <bonzini@gnu.org>
+
+	grep: rename files for intuitiveness
+	* Makefile.am (libgrep_a_SOURCES, grep_SOURCES, egrep_SOURCES,
+	fgrep_SOURCES): Adjust.
+	* grep.c: Rename to main.c.
+	* esearch.c: Rename to egrep.c.
+	* fsearch.c: Rename to fgrep.c.
+	* gsearch.c: Rename to grep.c.
+
+	grep: kill GREP_PROGRAM/EGREP_PROGRAM/FGREP_PROGRAM
+	* NEWS: Document slight semantic change.
+	* TODO: #ifdefs are gone.
+	* po/POTFILES.in: Update.
+	* src/Makefile.am (grep_SOURCES, egrep_SOURCES, fgrep_SOURCES): Remove
+	grep.c/egrep.c/fgrep.c.
+	(noinst_LIBRARIES): Change libsearch.a to libgrep.a.
+	(libsearch_a_SOURCES): Rename to libgrep_a_SOURCES, add grep.c
+	(LDADD): Change libsearch.a to libgrep.a.
+	* src/esearch.c: Add before_options and after_options.
+	* src/fsearch.c: Likewise.
+	* src/gsearch.c: Likewise.
+	* src/grep.c (short_options, long_options): Remove GREP_PROGRAM
+	special-casing.
+	(usage): Use before_options and after_options, look at matchers.
+	(setmatcher): Merge with install_matcher.
+	(main): Call setmatcher (NULL) instead of install_matcher.
+	* src/grep.h (GREP_PROGRAM): Remove.
+	(before_options, after_options): Add.
+
+	thank Eric Blake
+	* THANKS: Add Eric Blake, who reported the warning fixed by 774d0ee.
+
+	grep: libify *search.c
+	* src/Makefile.am (libsearch_a_SOURCES): Add dfasearch.c, kwsearch.c,
+	pcresearch.c.
+	* src/esearch.c, src/fsearch.c, * src/gsearch.c: Only include search.h.
+	* src/dfasearch.c (GEAcompile, EGexecute): Export.
+	* src/kwsearch.c (Fcompile, Fexecute): Export.
+	* src/pcresearch.c (Pcompile, Pexecute): Export.
+	* src/search.h: Add new exported functions.
+
+	grep: prepare for libification of *search.c
+	* src/dfasearch.c (Ecompile): Remove.
+	* src/esearch.c: Place it here...
+	* src/gsearch.c: ... and here.
+
+	grep: split search.c
+	* po/POTFILES.in: Update.
+	* src/Makefile.am (grep_SOURCES, egrep_SOURCES, fgrep_SOURCES): Move
+	kwset.c and dfa.c to libsearch.a.  Add searchutils.c there too.
+	* src/search.h, src/dfasearch.c, src/pcresearch.c, src/kwsearch.c,
+	src/searchutils.c: New files, split out of src/search.c.
+	* src/esearch.c, src/fsearch.c: Include the new files instead of search.c.
+	* src/gsearch.c: Likewise, plus move Gcompile/Acompile here.
+
+	grep: remove one #ifdef
+	* search.c (GEAcompile) [EGREP_PROGRAM]: Use common code.  Inline IF_BK.
+
+2010-03-22  Paolo Bonzini  <bonzini@gnu.org>
+
+	grep: eliminate {COMPILE,EXECUTE}_{RET,ARGS,FCT}
+	Modern compilers warn about type mismatches.
+
+	* src/grep.c (do_execute): Write full declaration.
+	* src/grep.h (COMPILE_RET, COMPILE_ARGS, COMPILE_FCT, EXECUTE_RET,
+	EXECUTE_ARGS, EXECUTE_FCT): Remove.
+	(compile_fp_t, execute_fp_t): Write full declaration.
+	* src/search.c (GEAcompile, Gcompile, Acompile, Ecompile, EGexecute,
+	Fcompile, Fexecute, Pcompile, Pexecute): Write full declaration.
+
+2010-03-22  Paolo Bonzini  <bonzini@gnu.org>
+
+	grep: make egrep/fgrep use struct matcher
+	* Makefile.am (grep_SOURCES): Add gsearch.c.
+	(EXTRA_DIST): Add search.c.
+	* esearch.c (matchers): New.
+	* fsearch.c (matchers): New.
+	* gsearch.c: New.
+	* search.c (matchers): Remove.
+	* grep.c: Always compile most !GREP_PROGRAM sections.
+	(main): Use first matcher if none is explicitly provided.  Remove
+	"default" matcher.
+	* grep.h (struct matcher): Adjust comments.
+
+	grep: change struct matcher termination
+	* src/grep.c (setmatcher): Look for NULL matchers[i].name.
+	* src/grep.h (struct matcher): Change name to pointer.  Adjust comments.
+	* src/search.c (matchers): Terminate with three NULLs.
+
+	grep: remove one #ifdef
+	* search.c (Ecompile): Always go through GEAcompile to use same code path
+	for both grep and egrep.
+
+	grep: remove getpagesize.h
+	* src/getpagesize.h: Remove.
+	* src/Makefile.am (noinst_HEADERS): Remove getpagesize.h.
+
+2010-03-21  Jim Meyering  <meyering@redhat.com>
+
+	build: use the fcntl-h module, not "fcntl"
+	* bootstrap.conf (gnulib_modules): We might need fcntl.h somewhere,
+	but don't use the fcntl function.  Reported by Bruno Haible.
+
+	build: avoid link failure on systems using gnulib's fcntl but not open
+	* bootstrap.conf (gnulib_modules): Using gnulib's fcntl module
+	and including <fcntl.h>, but not also using gnulib's "open" module
+	would result in link failure due to references to rpl_open
+	on systems requiring the replacement (e.g., Cygwin and Darwin).
+
+	build: avoid compilation failure on systems using rpl_open
+	This new build failure has arisen as a result of using gnulib's
+	"fcntl" module.  Now that an inadequate "open" syscall is replace
+	by gnulib's wrapper, it is essential to include <fcntl.h>.
+	* src/grep.c: Include <fcntl.h>.
+	This is required, for grepfile's use of open, at least on
+	Cygwin and Darwin.
+
+	maint: use gnulib's fcntl module, just in case
+	* bootstrap.conf (gnulib_modules): Add fcntl.
+	Grep uses at least O_BINARY, which may be defined therein.
+
+	maint: remove TYPE_* definitions from src/system.h
+	* src/system.h (TYPE_MAXIMUM, TYPE_MINIMUM, TYPE_SIGNED): Remove
+	definitions.  They are provided by intprops.h.
+	* src/grep.c: Include "intprops.h"
+	* bootstrap.conf (gnulib_modules): Add intprops.
+
+	maint: alphabetize #include directives
+	* src/grep.c: Alphabetize #include directives.
+
+2010-03-20  Jim Meyering  <meyering@redhat.com>
+
+	build: stop using gnulib's memmove module
+	* bootstrap.conf (gnulib_modules): Remove obsolete module: memmove
+
+	build: reinstate gnulib's fcntl-h-tests
+	* bootstrap.conf (gnulib_tool_option_extras): Do not avoid
+	the fcntl-h-tests.  I cannot reproduce the failure.
+
+2010-03-20  Eric Blake  <eblake@redhat.com>
+
+	build: allow compilation on cygwin
+	Gnulib is incompatible with -Wunused-macros.  Addtionally,
+	cygwin 1.7.1 coupled with --enable-gcc-warnings tripped on:
+
+	grep.c: In function 'print_line_middle':
+	grep.c:805: error: array subscript has type 'char' [-Wchar-subscripts]
+	grep.c: In function 'main':
+	grep.c:1833: error: 'optarg' redeclared without dllimport attribute: previous dllimport ignored [-Wattributes]
+	grep.c:1834: error: 'optind' redeclared without dllimport attribute after being referenced with dll linkage
+
+	* configure.ac (GNULIB_WARN_FLAGS): Disable -Wunused-macros.
+	* src/grep.c (print_line_middle): Use correct type to tolower.
+	(main): Drop useless redeclarations.
+	* .gitignore: Ignore more built files.
+
+2010-03-20  Jim Meyering  <meyering@redhat.com>
+
+	tests: ensure that all programs handle [b-a] consistently
+	* tests/reversed-range-endpoints: New test.
+	* tests/Makefile.am (TESTS): Add it.
+
+2010-03-20  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule to latest
+	This pulls in the latest regex module from gnulib, including a fix
+	to make it honor the RE_NO_EMPTY_RANGES syntax bit.
+
+	tests: temporarily disable irrelevant-to-grep failing C++ fcntl-h-tests
+	* bootstrap.conf (gnulib_tool_option_extras): Temporarily add
+	--avoid=fcntl-h-tests, until the C++ part of that test is fixed.
+
+2010-03-20  Jim Meyering  <meyering@redhat.com>
+
+	reject reversed-endpoint ranges, with all regex variants
+	* src/search.c: Add RE_NO_EMPTY_RANGES to the syntax bits
+	in three places, so that all of grep, egrep, and grep -E reject
+	a range with reversed endpoints like '[b-a]'.  This is required,
+	when using the latest version of gnulib's regex module, since it
+	now honors the RE_NO_EMPTY_RANGES flag, rather than acting as if
+	it were always set.
+	Based on a change by Matthew Burgess.
+
+2010-03-19  Jim Meyering  <meyering@redhat.com>
+
+	maint: correct macro parameter parentheses
+	* src/dfa.c (FETCH_WC, FETCH): Parenthesize macro parameters.
+
+2010-03-19  Paolo Bonzini  <bonzini@gnu.org>
+
+	tests: change help-version to per-program functions
+	* help-version: Change each *_args variable to a *_setup function.
+
+	dfa: fix wchar_t/wint_t type mismatch
+	* src/dfa.c (FETCH_WC): Pass a local wchar_t variable to mbrtowc.
+	(FETCH): Rename temporary second argument to FETCH_WC.
+	(parse_bracket_exp): Always use FETCH_WC.
+
+2010-03-19  Jim Meyering  <meyering@redhat.com>
+
+	doc: add README-prereq, referenced from README-hacking
+	* README-prereq: New file.  Cloned from coreutils, s/coreutils/grep/
+	Reported by Tony Abou-Assaleh.
+
+2010-03-19  Arnold Robbins  <arnold@skeeve.com>
+
+	maint: sync dfa comments from gawk
+	* src/dfa.h (struct dfa) [newlines]: Amend comment.
+	* src/dfa.c: Update copyright year list to include gawk's.
+
+2010-03-17  Jim Meyering  <meyering@redhat.com>
+
+	maint: remove obsolete "cvs-clean" make target
+	* Makefile.am (cvs-clean): Remove obsolete target.
+
+2010-03-17  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: initialize struct mbcset using memset
+	* src/dfa.c (parse_bracket_exp): Use memset to initialize workmbc.
+
+	dfa: spell out "unsigned int"
+	* dfa.c (setbit, tstbit, clrbit, setbit_case_fold, lex, dfaoptimize,
+	free_mbdata): Put "int" after unsigned.
+	* dfa.h (struct position, struct dfa): Likewise.
+
+2010-03-17  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: optimize simple character sets under UTF-8 charsets
+	Only use a bitset when possible without involving MBCSET.  Testcase:
+	   yes 'the quick brown fox jumps over the lazy dog' | sed 100000q | \
+	     time grep -c [ABCDEFGHIJKLMNOPQRSTUVWXYZ,]
+
+	Before: 51ms (best of three runs); after: 16ms(best of three runs).
+
+	* src/dfa.c (parse_bracket_exp): For simple bracket expressions
+	under UTF-8, use a CSET.
+
+2010-03-17  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: speed up handling of brackets
+	This patch has two sides.  One is to fold the parsing of brackets in the
+	single- and multi-byte cases.  The second is to leverage this change,
+	and use a bitset to test for single-byte characters in the charset.
+	Splitting the two would be very hard.
+
+	Testcase:
+	   yes 'the quick brown fox jumps over the lazy dog' | sed 100000q | \
+	     time grep -c [ABCDEFGHIJKLMNOPQRSTUVWXYZ,]
+
+	Before: 59ms (best of three runs); after: 51ms (best of three runs).
+	Nice, but mostly providing infrastructure for the next patch.
+
+	* src/dfa.c (setbit_case_fold): Try applying towlower/towupper.
+	(looking_at): Remove.
+	(FETCH_WC): New.
+	(fetch_wc): Merge into FETCH_WC [MBS_SUPPORT].
+	(FETCH) [MBS_SUPPORT]: Call FETCH_WC.
+	(prednames, find_pred, is_blank and other predicates): Move above,
+	remove K&R syntax support.
+	(parse_bracket_exp): New name of parse_bracket_exp_mb, rewritten to
+	include single-byte character set parsing of brackets.
+	(lex): Adjust for fetch_wc->FETCH_WC change, remove single-byte
+	character set parsing of brackets.
+	(match_mb_charset): Test against work_mbc->cset.
+	* src/dfa.h (struct mb_char_classes): Add cset.
+
+2010-03-17  Paolo Bonzini  <bonzini@gnu.org>
+
+	syntax-check: remove space-tab exception
+	* .x-sc_space_tab: Remove.
+	* src/dfa.c: Fix space-tab occurrence.
+
+	THANKS: fix Jim Meyering's email address
+	* THANKS: Jim is now with Red Hat.
+
+	dfa: add missing function
+	* src/dfa.c (using_utf8): New.
+	(addtok_wc, free_mbdata, dfaoptimize) [!MBS_SUPPORT]: Do not define.
+	(dfacomp) [!MBS_SUPPORT]: Do not call dfaoptimize.
+
+	tests: fix typo
+	* fedora: Fix typo.
+
+	tests: use Exit
+	* euc-mb: exit with "Exit 0".
+
+	grep: remove more register keywords
+	* dosbuf.c: Remove register keywords.
+	* grep.c: Remove register keywords.
+	* kwset.c: Remove register keywords.
+	* search.c: Remove register keywords.
+
+2010-03-17  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: run simple UTF-8 regexps as a single-byte character set
+	This provides a speedup whenever fgrep is "almost" sufficient but
+	not quite (e.g. grep ^abc).  This affects test cases such as
+	https://savannah.gnu.org/bugs/?29117, which are already worked around
+	by the line-by-line matching patch c32c04; without that patch the
+	speedup can reach 1000x even on non-contrived testcases.
+
+	* src/dfa.c (dfaoptimize): New.
+	(dfacomp): Call it.
+
+2010-03-17  Paolo Bonzini  <bonzini@gnu.org>
+
+	tests: fix syntax-check failures
+	* tests/case-fold-backref: Use "foo" instead of "the".
+	* tests/dfaexec-multibyte: Remove trailing blanks.
+
+2010-03-17  Paolo Bonzini  <bonzini@gnu.org>
+
+	grep: remove check_multibyte_string, fix non-UTF8 missed match
+	Avoid computing ahead something that can be computed lazily as efficiently
+	(or more efficiently in the case of UTF-8, though this is left as TODO).
+	At the same time, "soften" the rejection condition for matching in the
+	middle of a multibyte sequence to fix bug 23814.
+
+	Multibyte "grep -i" would still be very slow if it wasn't for the workaround
+	patch c32c042 (grep: match multibyte charsets line-by-line when using -i,
+	2010-03-08).
+
+	* NEWS: Document bugfix.
+	* src/search.c (check_multibyte_string): Rewrite as...
+	(is_mb_middle): ... this.
+	(EGexecute, Fexecute): Adjust.
+	* tests/Makefile.am (TESTS): Add euc-mb.
+	* tests/euc-mb: New testcase.
+
+2010-03-17  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: cache MB_CUR_MAX for dfaexec
+	* src/dfa.c (state_index, dfaexec): Use d->mb_cur_max.
+	(dfainit): Initialize it.
+	(free_mbdata): New, extracted out of dfafree.
+	(dfafree): Use it.
+
+	dfa: improve documentation of struct dfa
+	* src/dfa.h (struct dfa): Reword some comments.
+
+	tests: factor name of output files into a variable
+	* tests/case-fold-backref, tests/case-fold-char-class,
+	tests/case-fold-char-range, tests/case-fold-char-type,
+	tests/dfaexec-multibyte: Use a variable for the output filename,
+	as it is common to the grep and compare invocations.
+
+	tests: use different output files to simplify reading failed .log files
+	* tests/case-fold-backref, tests/case-fold-char-class,
+	tests/case-fold-char-range, tests/case-fold-char-type: Use a different
+	name for each output file from grep.
+	* tests/dfaexec-multibyte: Likewise, and merge some grep invocations.
+
+	tests: add another grep -i testcase, from bug 16179
+	* tests/case-fold-backref: New.
+	* tests/Makefile.am (TESTS): Add it.
+
+2010-03-16  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: rewrite handling of multibyte case_fold lexing
+	Let dfacomp do the folding to lowercase of multibyte input strings,
+	and remove it from grep.c.  Input strings to kwset.c are still folded
+	outside kwset.c, so we still need to do mbtolower in search.c.
+
+	* NEWS: Document bugfixes.
+	* .x-sc_cast_of_argument_to_free: Remove.
+	* src/dfa.c (wctok, addtok_wc): New.
+	(cur_mb_index, update_mb_len_index): Remove.
+	(FETCH): Do not call it.
+	(parse_bracket_exp_mb) [GREP]: Disable case-folding of ranges and
+	characters.
+	(addtok): Extract part to...
+	(addtok_mb): ... this new function.
+	(lex): Call fetch_wc in the main loop for MB_CUR_MAX > 1.  Return WCHAR
+	for normal characters if MB_CUR_MAX > 1.
+	(atom): Handle WCHAR instead of treating multibyte characters specially.
+	Do case folding of multibyte characters here.
+	(dfacomp): Remove case_fold special casing.
+	* src/dfa.h (WCHAR): New.
+	* src/grep.c (mb_icase_keys): Remove.
+	(main): Do not call it.
+	* src/search.c (kwsinit): Init transition table only for MB_CUR_MAX == 1.
+	(mbtolower): New.
+	(kwsincr_case): New.
+	(kwsmusts): Call it instead of kwsincr.
+	(check_multibyte_string): Remove.
+	(check_multibyte_string_no_icase): Rename to check_multibyte_string.
+	(GEAcompile, EGexecute, Fcompile): Use mbtolower instead of the old
+	check_multibyte_string.
+	* tests/Makefile.am (TESTS): Add case-fold-backslash-w.
+	* tests/foad1.sh: Enable fixed tests.
+	* tests/case-fold-backslash-w: New.
+
+2010-03-16  Paolo Bonzini  <bonzini@gnu.org>
+
+	grep: match multibyte charsets line-by-line when using -i
+	The turtle combination -i + MB_CUR_MAX>1 requires case conversion ahead
+	of time.  Avoid doing this repeatedly when many matches succeed.  Together
+	with the previous changes, this fixes https://savannah.gnu.org/bugs/?29117
+	and https://savannah.gnu.org/bugs/?14472.
+
+	* NEWS: Document new speedup.
+	* src/grep.c (do_execute): New.
+	(grepbuf): Use it.
+
+2010-03-15  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: fix handling of ranges in multibyte character sets
+	* src/dfa.c (parse_bracket_exp_mb): Add separate ranges for
+	lowercase and uppercase endpoints if folding case.
+	* tests/Makefile.am (TESTS): Add case-fold-char-range.
+	* tests/case-fold-char-range: New.
+
+	tests: add more UTF-8 test cases
+	* tests/Makefile.am (TESTS): Add spencer1-locale.
+	(EXTRA_DIST): Add spencer1-locale.awk.
+	* tests/spencer1-locale.awk: New.
+	* tests/spencer1-locale: New.
+
+2010-03-15  Jim Meyering  <meyering@redhat.com>
+
+	tests: complete the renaming fedora.sh -> fedora
+	* tests/Makefile.am (TESTS): Rename fedora.sh -> fedora here, too.
+
+2010-03-15  Jim Meyering  <meyering@redhat.com>
+
+	* tests/fedora.sh: Rename to...
+	* tests/fedora: ...this, to reflect new convention:
+	Use the lack of a suffix to indicate we've converted to the new
+	init.sh-using test framework.
+
+	tests: adjust fedora.sh to handle traps more portably
+
+2010-03-15  Jim Meyering  <meyering@redhat.com>
+
+	tests: adjust fedora.sh to handle traps more portably
+	* tests/fedora.sh: Use "Exit", not "exit".
+
+	tests: for each test, set an envvar to its name
+	* tests/Makefile.am (TESTS_ENVIRONMENT): Set GREP_TEST_NAME for
+	each test.  This is used to help make the output of hundreds of
+	independent, often-parallel valgrind runs more manageable.
+
+2010-03-14  Jim Meyering  <meyering@redhat.com>
+
+	tests: clean up fedora.sh
+	* tests/fedora.sh: Use "grep", not ${GREP}.
+	Use init.sh.
+	Use timeout 10, not sleep 1 (three times).
+	The latter would always sleep for 3 seconds, and the test would
+	fail with a false positive on a slow system or with a heavily
+	instrumented (valgrind) executable.
+
+2010-03-12  Jim Meyering  <meyering@redhat.com>
+
+	build: avoid build failure with --enable-gcc-warnings
+	* src/dfa.c: Don't include <assert.h>, now that it is not used.
+	[DEBUG]: Remove #ifdef block.
+
+2010-03-12  Paolo Bonzini  <bonzini@gnu.org>
+
+	syntax-check: enable space-tab
+	* cfg.mk (local-checks-to-skip): Enable space-tab.
+	* .x-sc_space_tab: Add exceptions.
+	* tests/status.sh: Fix occurrence.
+
+	syntax-check: enable m4-quote-check
+	* cfg.mk (local-checks-to-skip): Enable m4-quote-check.
+	* configure.ac: Fix occurrence.
+
+	syntax-check: enable makefile-TAB-only-indentation
+	* cfg.mk (local-checks-to-skip): Enable makefile-TAB-only-indentation.
+	* Makefile.am: Fix only occurrence.
+
+	grep: fix error-message-uppercase
+	* cfg.mk (local-checks-to-skip): Enable error-message-uppercase.
+	* src/dfa.c (parse_bracket_exp_mb, lex, dfaparse): Fix occurrences.
+	* src/search.c (Pcompile, Pexecute): Fix occurrences.
+
+	dfa, grep: cleanup if-before-free and cast-of-argument-to-free
+	* .x-sc_avoid_if_before_free: Remove.
+	* .x-sc_cast_of_alloca_return_value: Remove.
+	* .x-sc_cast_of_x_alloc_return_value: Remove.
+	* .x-sc_cast_of_argument_to_free: Temporarily add src/search.c.
+	* cfg.mk (local-checks-to-skip): Remove sc_cast_of_argument_to_free.
+	* src/dfa.c (ifree): Remove.
+	(dfamust, build_state, transit_state, dfafree): Do not do if-before-free,
+	do not cast free argument to ptr_t or char *.
+	(freelist): Call free instead of ifree.
+	* src/dfa.h (ptr_t): Remove.
+
+2010-03-12  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: remove CRANGE dead code
+	The only use of CRANGE was removed by commit 193830d.  In theory it is
+	more correct to do what CRANGE did, but in practice it seems like it did
+	not work.
+
+	* src/dfa.h (token): Remove CRANGE.
+	* src/dfa.c (atom): Do not handle CRANGE.
+	(prtok): Likewise.
+
+2010-03-12  Paolo Bonzini  <bonzini@gnu.org>
+
+	dfa: get rid of x*alloc
+	* src/dfa.c: Include xalloc.h.
+	(xmalloc, xrealloc, xcalloc): Remove.
+
+	grep: cleanup one const cast
+	* src/search.c (GEAcompile): Do not reuse motif when operating on the
+	(const) pattern, so we can make it non-const.  Remove cast from free.
+
+	kwset/system: remove ptr_t
+	* src/kwset.h: Declare kwset using an incomplete struct type.
+	* src/system.h (ptr_t): Remove.
+
+2010-03-12  Jim Meyering  <meyering@redhat.com>
+
+	tests: add test cases for dfaexec bug
+	* tests/dfaexec-multibyte: New test.
+	* tests/Makefile.am (TESTS): Add it.
+	Reported by Paolo Bonzini in http://bugzilla.redhat.com/544407
+	and http://bugzilla.redhat.com/544406 .
+
+2010-03-12  Jim Meyering  <meyering@redhat.com>
+
+	dfa: manually merge gawk's dfaexec
+	* src/dfa.c (dfaexec): Adjust API: return pointer, not offset, and
+	take an "end" pointer parameter, rather than integral "size".
+	Adjust comment accordingly.
+	(build_state): Maintain d->newlines.
+	(copytoks): Update multibyte_prop indices.
+	(SKIP_REMAINS_MB_IF_INITIAL_STATE): Update a cast.
+	Return NULL, rather than (size_t) -1.
+	(realloc_trans_if_necessary): Realloc d->newlines.
+	* src/dfa.h (struct dfa): New member, "newlines".
+	(struct dfa) [GAWK]: New member, "broken".
+	(dfaexec): Update prototype and copy the new comment from dfa.c.
+
+	dfa: make search.c use the new dfaexec API
+
+	* src/search.c: Adjust to new dfaexec API.
+	Now, dfaexec returns a pointer, not an integer,
+	and the third parameter is END, not buffer size.
+	* src/dfa.c (dfaexec): Rewrite the function's comment.
+	Don't just clobber *END.  While doing that happens to be
+	fine for gawk's usage, in grep, *END usually points to the
+	first byte of the next buffer.  Save the initial value,
+	and restore it just before returning.
+	* src/dfa.h (dfaexec): Update comment; include parameter names.
+
+2010-03-12  Jim Meyering  <meyering@redhat.com>
+
+	dfa: appease static analyzers
+	* src/dfa.c (transit_state_singlebyte): Call abort rather
+	than returning in a "can't happen" scenario.
+	This stops clang from emitting a false-positive report (I think it
+	was used-uninitialized) about a caller.
+
+2010-03-11  Jim Meyering  <meyering@redhat.com>
+
+	dfa: do not accept [[:UPPER:]] or [[:LOWER:]] internally
+	* src/dfa.c (parse_bracket_exp_mb): Those class names are not
+	valid, and rejected elsewhere, so there is no point in allowing
+	upper or mixed-case versions here.
+
+2010-03-11  Jim Meyering  <meyering@redhat.com>
+
+	maint: remove a trailing space
+	* src/search.c (EXECUTE_FCT): Remove trailing space.
+
+	maint: remove all uses of PARAMS
+	Remove most with this:
+	git grep -lw PARAMS |xargs perl -pi -e 's/\bPARAMS *\((.*)\);/$1;/'
+	Remove the remainder manually.
+
+2010-03-11  Jim Meyering  <meyering@redhat.com>
+
+	maint: remove all uses of PARAMS
+	* lib/savedir.h (PARAMS): Remove definitions manually.
+	Remove the remaining ones via this command:
+	  git grep -l define.PARAMS |xargs perl -ni -e '/define PARAMS/ or print'
+	* src/dfa.h (PARAMS): Remove definitions.
+	* src/system.h (PARAMS): Likewise.
+	Remove most uses with this:
+	  git grep -lw PARAMS |xargs perl -pi -e 's/\bPARAMS *\((.*)\);/$1;/'
+	Remove the remainder manually.
+
+	maint: remove now-useless prototypes
+	* src/dfa.c: Remove the prototype of each static, non-recursive
+	function whose definition precedes first use.
+
+	grep: plug an inconsequential leak
+	* src/grep.c (main): Plug a leak: free "keys".
+
+	grep: avoid useless allocations for empty GREP_OPTIONS
+	* src/grep.c (prepend_default_options): Ignore GREP_OPTIONS
+	when it's empty, not just when it's undefined.
+	There are still relatively harmless leaks when GREP_OPTIONS
+	is set and non-empty.  We'll address those, eventually.
+
+2010-03-09  Jim Meyering  <meyering@redhat.com>
+
+	build: record build-from-clone tool requirements
+	* bootstrap.conf (buildreq): This makes bootstrap fail with
+	a clear explanation of the problem.  Otherwise, you'd get into
+	the build process and fail with something far more cryptic.
+
+	dfa: remove a trailing blank
+	* src/dfa.c (dfaexec): No trailing blanks allowed.
+
+	dfa: sync a tiny change from gawk
+	* src/dfa.c (state_index) [MBS_SUPPORT]: Initialize .mpbs.nelem member
+	unconditionally.  Also initialize .mbps.elems.
+
+	dfa: avoid a leak (work_mbc->chars)
+	* src/dfa.c (parse_bracket_exp_mb): Remove useless (and leaked MALLOC).
+
+	doc+bootstrap: document build-from-git-clone process
+	* bootstrap: Update from coreutils/gnulib.
+	* README-hacking: New file, nearly identical to the one in coreutils.
+
+2010-03-08  Paolo Bonzini  <bonzini@gnu.org>
+
+	more work on TODO
+	* TODO: More work on the first section.  Use clearer section headers.
+
+2010-03-08  Reuben Thomas  <rrt@sc3d.org>
+
+	bring TODO up-to-date
+	* TODO: merge with TODO section of http://www.gnu.org/software/grep/devel.html
+	and remove done items. Some small bits of tidying also.
+
+2010-03-07  Paolo Bonzini  <bonzini@gnu.org>
+
+	simplify parsing of [a-z]
+	* src/dfa.c (in_coll_range): New.
+	(lex): Use it instead of regcomp/regexec.
+
+	Small refactoring in src/dfa.c
+	* src/dfa.c (parse_bracket_exp_mb): Return MBCSET.
+	(lex): Assign return value of parse_bracket_exp_mb to lasttok, return it.
+
+	use do...while(0) idiom
+	* dfa.c (FETCH): Wrap with do...while(0).
+
+2010-03-06  Paolo Bonzini  <bonzini@gnu.org>
+
+	extract common code from if/else
+	* dfa.c (dfaexec): Simplify logic for MB_CUR_MAX > 1 case.
+
+	remove register variable hacks
+	* dfa.c (dfaexec): We can extract the address of a variable without fearing
+	performance problems, modern compilers know better.
+
+	remove register keywords
+	* dfa.c (dfaexec): Modern compilers just ignore it.
+
+	allow grep -Pz
+	* NEWS: Document grep -P improvements.
+	* src/search.c (Pcompile): Remove restriction on grep -Pz.
+	* tests/pcre-z: New.
+	* tests/Makefile.am (TESTS): Add pcre-z.
+
+	fix cross-line matching in PCRE backend
+	* search.c (Pexecute): Split the buffer in lines and match each line
+	separately.
+	* tests/fedora.sh: Add regression testsuite.
+
+	fix formatting of NEWS
+	* NEWS: fix formatting of 2.6 entries.
+
+	fix a bug in handling of -i and character type
+	* dfa.c (parse_bracket_exp_mb): Convert [[:lower:]] and [[:upper]] to
+	[[:alpha:]] when folding case.
+	* tests/case-fold-char-type: New file.  Test for the bug.
+	* tests/Makefile.am (TESTS): Add it.
+	* NEWS (Bug fixes): Mention it.
+
+	fix previous test case change
+	* tests/case-fold-char-class: Do not reset fail to 0 after first test.
+
+2010-03-06  Mike Frysinger  <vapier@gentoo.org>
+
+	grep(1) man page: touchup --label option
+	* doc/grep.1 (--label): Don't italicize ending period.  Point to -H
+	option.
+
+2010-03-06  Paolo Bonzini  <bonzini@gnu.org>
+
+	augment case-fold-char-class test case
+	* tests/case-fold-char-class: Test matching lowercase against uppercase
+	as well as vice versa.
+
+2010-03-05  Reuben Thomas  <rrt@sc3d.org>
+
+	doc: improve the discussion of PCRE
+	* doc/grep.1: Add a sentence about Perl regular expressions,
+	and point to pcresyntax(3) and pcrepattern(3).
+	* doc/grep.texi: Likewise.
+
+2010-03-05  Jim Meyering  <meyering@redhat.com>
+
+	maint: dfa-sync: comment and dead-to-grep code: no semantic change
+	* src/dfa.c: Sync a comment and some #ifdef GAWK code.
+
+	maint: dfa-sync: don't malloc zero
+	* src/dfa.c (dfacomp): Skip case_fold logic when length is zero.
+	This probably "no semantic change", but does improve efficiency in
+	a degenerate case.
+
+	maint: dfa-sync: use CALLOC rather than equiv. MALLOC+initialize-loop
+	* src/dfa.c (dfaanalyze): Sync from gawk.  No semantic change.
+
+	dfa.c: add support for \s and \S
+	* src/dfa.c (lex): Sync from gawk's dfa.c.
+
+	maint: dfa-sync: add omitted array initializer
+	* src/dfa.c (prednames): Add a "0" to final initializer.
+	No semantic change.
+
+	fix a bug in handling of -i and character classes
+	* dfa.c (parse_bracket_exp_mb): Sync one part of this function
+	from gawk's dfa.c, which was patched by Arnold D. Robbins.
+	* tests/case-fold-char-class: New file.  Test for the bug.
+	* tests/Makefile.am (TESTS): Add it.
+	(TESTS_ENVIRONMENT): Propagate LOCALE_FR and LOCALE_FR_UTF8
+	definitions into tests.
+	* NEWS (Bug fixes): Mention it.
+
+2010-03-05  Paolo Bonzini  <pbonzini@redhat.com>
+
+	Fedora Grep regression test suite
+	* tests/Makefile.am (TESTS): Add fedora.sh.
+	(CLEANFILES): Add several new files.
+	* tests/fedora.sh: New file, originally by Lubomir Rintel but somewhat
+	rewritten to avoid bashisms.
+
+2010-03-05  Paolo Bonzini  <bonzini@gnu.org>
+
+	convert AUTHORS file to UTF-8
+	* AUTHORS: Convert to UTF-8.
+
+	eliminate invalid "ptr += (ptr2 - ptr1)"
+	* lib/savedir.c (savedir): new_name_space and name_space do not point into
+	the same object, so computing their difference is invalid.  Similarly,
+	summing the difference to namep is invalid because namep and the result
+	point into different objects.  Avoid this.
+
+	fix for bug 21276
+	* lib/savedir.c (isdir1): Use realloc instead of calloc.  Remove
+	dead code.
+	(savedir): Do not leak name_space if allocation of new_name_space fails.
+
+2010-03-04  Jim Meyering  <meyering@redhat.com>
+
+	tests: add a test based on an example from Paolo Bonzini
+	* tests/word-multi-file: New test.
+	* tests/Makefile.am (TESTS): Add it.
+
+	doc: document release procedure
+	* README-release: New file.
+
+	build: update gnulib submodule to latest
+
+2010-02-22  Paolo Bonzini  <bonzini@gnu.org>
+
+	add --group-separator=FOO and --no-group-separator
+	* src/grep.c (group_separator): New.
+	(long_options): Add --group-separator=FOO and --no-group-separator.
+	(prtext): Print group_separator instead of SEP_STR_GROUP.  Optionally
+	suppress the separator altogether.
+	(main) Handle GROUP_SEPARATOR_OPTION.
+	* doc/grep.texi (Context control): Document it.
+	* NEWS: Mention it.
+	* tests/yesno.sh: Add testcases.
+
+2010-02-21  Jim Meyering  <meyering@redhat.com>
+
+	tests: don't use "echo -n"
+	* tests/foad1.sh: Use printf, not echo -n.  The latter is not portable.
+	Reported by Daniel Richman.
+
+2010-02-08  Jim Meyering  <meyering@redhat.com>
+
+	remove useless DJGPP-specific code
+	* src/grep.c (grepfile): Remove now-useless DJGPP-specific code.
+	Now, all S_IS* macros are guaranteed to be defined via gnulib.
+
+2010-02-07  Jim Meyering  <meyering@redhat.com>
+
+	tests: add help-version sanity tests from coreutils
+	* tests/help-version: New test, from coreutils.
+	* tests/Makefile.am (TESTS): Add it.
+	(TESTS_ENVIRONMENT) [built_programs]: Define it.
+
+	tests: correct TESTS_ENVIRONMENT's PATH setting
+	* tests/Makefile.am (TESTS_ENVIRONMENT): Set PATH to start with
+	$(abs_top_builddir)/src, so that we test the programs we've just built.
+
+	grep: use the correct exit status (2) upon write failure, not 1
+	* src/grep.c (main): Initialize exit_failure to EXIT_TROUBLE.
+	* NEWS (Bug fixes): Mention this fix.
+
+	maint: enable the prohibit_magic_number_exit syntax check
+	* cfg.mk (local-checks-to-skip): Remove sc_prohibit_magic_number_exit,
+	to enable that check.
+	* src/system.h (EXIT_TROUBLE): Define.
+	* src/grep.c: Use symbolic names, EXIT_SUCCESS, EXIT_FAILURE, and
+	EXIT_TROUBLE, not 0, 1, 2.
+	* src/search.c: Likewise.
+	* src/vms_fab.c (string): Likewise.
+
+2010-02-04  Jim Meyering  <meyering@redhat.com>
+
+	doc: adjust NEWS item
+	* NEWS: Correct a description.
+
+2010-02-03  Jim Meyering  <meyering@redhat.com>
+
+	tests: exercise surprising -m1 vs. --context behavior
+	* tests/max-count-vs-context: New test.  Exercise the surprising,
+	but documented, behavior reported by Markus Jochim in
+	http://savannah.gnu.org/bugs/?28588.
+	* tests/Makefile.am (TESTS): Add it.
+
+	tests: use init.sh from gnulib
+	* tests/init.sh: New file, from gnulib.
+	* tests/Makefile.am (EXTRA_DIST): Add it.
+	(TESTS_ENVIRONMENT): Add variables and features.
+	(VERBOSE): Define.
+
+	maint: remove unused Makefile rule
+	* tests/Makefile.am (dist-hook): Remove rule.  No longer needed.
+
+	maint: adjust formatting in tests/Makefile.am
+	* tests/Makefile.am (TESTS, CLEANFILES): Align and sort.
+
+	build: avoid warnings in gnulib-supplied regex files
+	Now that we enable more warnings in lib/, we choose
+	to avoid some via patches applied by bootstrap, using
+	files in the gl/ hierarchy.  Other, less-important
+	warnings are avoided simply by turning off the
+	-Wold-style-definition option and using a slightly
+	relaxed set of warnings $(GNULIB_WARN_CFLAGS) in lib/.
+	* gl/lib/regcomp.c.diff: Avoid warnings.
+	* gl/lib/regex_internal.c.diff: Likewise.
+	* gl/lib/regex_internal.h.diff: Likewise.
+	* gl/lib/regexec.c.diff: Likewise.
+	* configure.ac (GNULIB_PORTCHECK): Disable only -Wold-style-definition.
+	* lib/Makefile.am (AM_CFLAGS): Use $(GNULIB_WARN_CFLAGS) rather
+	than the slightly more strict $(WARN_CFLAGS).
+
+	tests: adjust spencer #37 to pass with gnulib's regex code
+	* tests/spencer1.tests: Change #37 to expect an exit status of 2, not 1.
+	grep 'a[b-a]' reports "Invalid range end".
+
+	maint: use regex from gnulib, rather than our bit-rotting one
+	* bootstrap.conf (gnulib_modules): Add regex.
+	* configure.ac: Don't use jm_INCLUDED_REGEX.
+	Update use of cache variable.
+	* lib/regex.c: Remove file.
+	* lib/regex.h: Likewise.
+	* m4/regex.m4: Likewise.
+	* POTFILES.in: Update to match.
+
+	build: update gnulib submodule to latest
+
+2010-01-28  Jim Meyering  <meyering@redhat.com>
+
+	maint: update to latest gnulib; adjust cfg.mk
+	* gnulib: Update submodule to latest.
+	* cfg.mk (old_NEWS_hash): Update to reflect NEWS Copyright line change.
+
+2010-01-06  Jim Meyering  <meyering@redhat.com>
+
+	maint: avoid old jm_* macros
+	There were jm_* macros here, until very recently.
+	* cfg.mk (sc_prohibit_jm_in_m4): New rule, from coreutils.
+
+	maint: remove decl.m4
+	* m4/decl.m4: Remove unused file.
+
+	maint: rely on gnulib's new isdir.h
+	* src/grep.c: Include "isdir.h".
+	* src/system.h: Remove declaration of isdir.
+
+	build: rename local to avoid shadowing global, dfa
+	* src/dfa.c (dfamust): Rename parameter: s/dfa/d/.
+
+	build: avoid warning from -Wmissing-prototypes
+	* src/dfa.c (match_mb_charset): Declare to be static.
+
+	build: avoid shadowing warning for "link"
+	* src/kwset.c (link): Define to kwset_link, to avoid shadowing
+	the function.
+
+	build: avoid shadowing warning for unused "rs"
+	* src/dfa.c (transit_state): Remove dead stores;
+	move a declaration "down".
+	Ignore transit_state_consume_1char return value.
+
+	build: avoid shadowing warnings
+	* src/dfa.c (match_mb_charset): Rename parameter: s/index/idx/.
+	(check_matching_with_multibyte_ops, match_anychar): Likewise.
+
+	build: avoid warning about unused definition of N_
+	* src/dfa.c (N_): Remove unused definition.
+
+	build: avoid format-string warnings
+	* src/search.c (dfaerror): Use literal "%s" as format string.
+	(kwsmusts, GEAcompile): Likewise.
+	(Pcompile): Likewise.
+
+	build: add configure-time --enable-gcc-warnings option; avoid warnings
+	* bootstrap.conf (gnulib_modules): Add "manywarnings" module.
+	* configure.ac: Add --enable-gcc-warnings, derived from code in bison.
+	* src/Makefile.am (AM_CFLAGS): Set to $(WARN_CFLAGS) $(WERROR_CFLAGS)
+	* lib/Makefile.am (AM_CFLAGS): Likewise, but append.
+
+	build: remove now-useless -I../intl option
+	* src/Makefile.am (INCLUDES): Remove -I../intl, now that intl is gone.
+
+	maint: avoid more warnings
+	* src/grep.c (MAX): Remove definition of unused macro.
+	(usage): Declare with __attribute__ ((noreturn)).
+	Split long strings into chunks of length < 509.
+
+	fix a possible bug: remove errant semicolon
+	* src/grep.c (prline): Remove erroneous semicolon-after-if-expr.
+
+	maint: avoid compilation warnings
+	* bootstrap.conf (gnulib_modules): Add ignore-value.
+	* src/search.c (check_multibyte_string_no_icase): A variant of
+	check_multibyte_string that does *not* convert case, and hence
+	does not modify its BUF parameter.
+	(check_multibyte_string): Use xcalloc in place of xmalloc+memset.
+	Use ignore_value to ignore the return value from wcrtomb.  This is
+	ok, since we know the input is a valid upper case wide character.
+	(Fexecute, EGexecute): Update callers of check_multibyte_string
+	to use both it and check_multibyte_string_no_icase.
+
+	maint: avoid warnings about unused fwrite return value
+	* bootstrap.conf (gnulib_modules): Add unlocked-io.
+	* src/system.h: Include "unlocked-io.h".
+
+	maint: remove {m4,lib}/.gitignore; they were undergoing too much churn
+	* .gitignore: Ignore all of m4/* except m4/djgpp.m4
+	and all of lib/* except Makefile.am, savedir.c and savedir.h.
+	* m4/.gitignore: Remove file.
+	* lib/.gitignore: Remove file.
+
+2010-01-05  Jim Meyering  <meyering@redhat.com>
+
+	build: run gnulib's tests, too
+	* Makefile.am (SUBDIRS): Add gnulib-tests.
+	* gnulib-tests/Makefile.am: New file.
+	* bootstrap.conf (bootstrap_epilogue): New function, from coreutils.
+	(gnulib_tool_option_extras): Define.
+	* configure.ac: Add gnulib-tests/Makefile.
+
+2010-01-03  Jim Meyering  <meyering@redhat.com>
+
+	maint: record update-copyright options for this package
+	* cfg.mk: Next time, just run "make update-copyright".
+
+2010-01-01  Jim Meyering  <meyering@redhat.com>
+
+	maint: update all FSF copyright year lists to include 2010
+	Use this command:
+	git ls-files |grep -vE '^(\..*|COPYING|gnulib)$' |xargs \
+	env UPDATE_COPYRIGHT_USE_INTERVALS=1 build-aux/update-copyright
+
+2009-12-23  Jim Meyering  <meyering@redhat.com>
+
+	fix multi-byte-locale read-beyond-end-of-buffer error
+	Avoid read-beyond-end-of-buffer errors, evoked by running this:
+	LC_ALL=en_US.UTF-8 valgrind src/grep -f <(printf 'a\nb\n') <(echo c)
+
+	Conditional jump or move depends on uninitialised value(s)
+	   at 0x78136D: __gconv_transform_utf8_internal (in /lib/libc-2.11.so)
+	   by 0x7E7232: mbrtowc (in /lib/libc-2.11.so)
+	   by 0x8055773: dfaexec (dfa.c:2816)
+	   by 0x804D7B0: EGexecute (search.c:353)
+	   by 0x804ACD8: grepbuf (grep.c:1036)
+	   by 0x804B023: grep (grep.c:1156)
+	   by 0x804B460: grepfile (grep.c:1287)
+	   by 0x804CF0D: main (grep.c:2282)
+
+	Conditional jump or move depends on uninitialised value(s)
+	   at 0x7E7248: mbrtowc (in /lib/libc-2.11.so)
+	   by 0x8055773: dfaexec (dfa.c:2816)
+	   by 0x804D7B0: EGexecute (search.c:353)
+	   by 0x804ACD8: grepbuf (grep.c:1036)
+	   by 0x804B023: grep (grep.c:1156)
+	   by 0x804B460: grepfile (grep.c:1287)
+	   by 0x804CF0D: main (grep.c:2282)
+
+	* src/dfa.c (dfaexec) [MBS_SUPPORT]: Do not access one byte beyond
+	end of buffer.
+
+2009-12-23  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule to latest
+
+2009-12-23  Paolo Bonzini  <bonzini@gnu.org>
+
+	Speed up insert.
+	Suggested by Johan Walles <johan.walles@gmail.com> (bug 23354).
+
+	* src/dfa.c (insert): Use binary search.
+
+2009-12-23  Johan Walles  <johan.walles@gmail.com>
+
+	Decrease epsclosure memory usage
+	Fixes bug 23321.
+
+	* src/dfa.c (epsclosure): Make visited an array of char.
+
+2009-12-22  Paolo Bonzini  <bonzini@gnu.org>
+
+	Make 'grep -1 -2' and 'grep -1v2' equivalent to grep -2
+	Fixes bug 12128.
+
+	* src/grep.c (get_nondigit_option): Reset the buffer every time
+	a non-digit option is found or a new argument is started.
+
+2009-12-22  Paolo Bonzini  <bonzini@gnu.org>
+
+	Improve description of --label
+	Fixes bug 22681.
+
+	* doc/grep.1 (--label): Use -H in the example, improve wording.
+	* doc/grep.texi (Output Line Prefix Control): Likewise.
+
+2009-12-22  Paolo Bonzini  <bonzini@gnu.org>
+
+	Avoid using an invalid memchr result.
+	Related to bug 13161.  I cannot find a testcase, but it is better to be
+	defensive considering that these bug were found in the past.
+
+	* src/search.c (EGexecute, Fexecute): Check for memchr return values.
+
+2009-12-11  Jim Meyering  <meyering@redhat.com>
+
+	build: update gnulib submodule to latest
+
+2009-12-04  Jim Meyering  <meyering@redhat.com>
+
+	maint: enable prohibit_have_config_h check
+	* cfg.mk (local-checks-to-skip): Enable sc_prohibit_have_config_h
+	* lib/regex.c: Remove useless cpp test of HAVE_CONFIG_H.
+	* lib/savedir.c: Likewise.
+	* src/grep.c: Likewise.
+	* src/kwset.c: Likewise.
+	* src/search.c: Likewise.
+
+	maint: enable cast_of_x_alloc_return_value check
+	* cfg.mk (local-checks-to-skip): Enable sc_cast_of_x_alloc_return_value.
+	* .x-sc_cast_of_x_alloc_return_value:
+	* src/dfa.c (CALLOC, MALLOC, REALLOC): Remove casts.
+	* src/dosbuf.c (undossify_input): Likewise.
+	* src/grep.c (print_line_middle, prepend_default_options): Likewise.
+
+	maint: enable cast_of_alloca_return_value check
+	* cfg.mk (local-checks-to-skip): Enable sc_cast_of_alloca_return_value.
+	* .x-sc_cast_of_alloca_return_value: New file.
+
+2009-12-04  Paolo Bonzini  <bonzini@gnu.org>
+
+	fix "grep -Ff" on CRLF-terminated files
+	* src/search.c (Fcompile) [HAVE_DOS_FILE_CONTENTS]: Recognize \r\n as
+	a line terminator.
+
+	fix compilation with included regex
+	* Makefile.am (libgreputils_a_DEPENDENCIES): New.
+
+	switch to pkg-config for PCRE detection
+	* configure.ac: use pkg-config to detect PCRE
+	* src/Makefile.am (grep_LDADD): link grep with PCRE_LIBS
+
+2009-12-04  Jim Meyering  <meyering@redhat.com>
+
+	maint: remove "missing" script
+	* missing: Remove now-unused file.
+
+	maint: make .gitignore ignore more
+	* .gitignore: Ignore more.
+
+	maint: enable useless-if-before-free check
+	* cfg.mk (local-checks-to-skip): Enable sc_avoid_if_before_free.
+	* .x-sc_avoid_if_before_free: New file.  Exempt regex.c and dfa.c,
+	in case anyone ever tries to merge their contents with other versions.
+	* src/grep.c (print_line_middle, grepdir): Remove useless if-before-free.
+	* src/search.c (IF_BK, EXECUTE_FCT): Likewise.
+
+	maint: enable po-check
+	* cfg.mk (local-checks-to-skip): Enable sc_po_check.
+	* po/POTFILES.in: Sort and update.
+
+2009-12-03  Paolo Bonzini  <bonzini@gnu.org>
+
+	update gnulib, fixing missing inclusion of stdbool.h
+	* gnulib: Update.
+
+2009-11-30  Jim Meyering  <meyering@redhat.com>
+
+	maint: enable two checks
+	* cfg.mk (local-checks-to-skip): Enable two:
+	sc_prohibit_xalloc_without_use sc_two_space_separator_in_usage
+	* src/grep.c (usage): Conform: use two spaces, not 1.
+	* src/kwset.c (malloc): Define as a function-macro so that the
+	syntax-check rule sees that we are indeed using xmalloc here.
+
+	maint: enable makefile_path_separator check
+	* cfg.mk (local-checks-to-skip): Enable sc_makefile_path_separator_check,
+	now that the sole offender, an old po/Makefile.in.in, is gone.
+
+	maint: remove now-generated file: po/Makefile.in.in
+	* po/Makefile.in.in: Remove file, now generated via bootstrap.
+
+	maint: enable makefile @...@ check
+	* cfg.mk (local-checks-to-skip): Enable sc_makefile_check.
+	* lib/Makefile.am (libgreputils_a_LIBADD): Use $(...), rather than
+	anachronistic @...@ notation.
+	* src/Makefile.am (LDADD): Likewise.
+	* tests/Makefile.am (AWK): Remove definition.
+
+	maint: enable trailing_blank check
+	* cfg.mk (local-checks-to-skip): Enable sc_trailing_blank.
+	* AUTHORS: Remove trailing blanks.
+	* COPYING: Likewise.
+	* README: Likewise.
+	* README-alpha: Likewise.
+	* README-boot: Likewise.
+	* THANKS: Likewise.
+	* TODO: Likewise.
+	* src/dfa.c: Likewise.
+	* src/mbsupport.h: Likewise.
+	* tests/backref.sh: Likewise.
+	* tests/file.sh: Likewise.
+	* tests/options.sh: Likewise.
+	* tests/tests: Likewise.
+	* vms/README: Likewise.
+	* vms/make.com: Likewise.
+
+	maint: enable unmarked_diagnostics check
+	* cfg.mk (local-checks-to-skip): Enable sc_unmarked_diagnostics
+	* src/grep.c (fillbuf): Mark a diagnostic for translation.
+	(reset): Likewise.
+
+	maint: enable require_config_h checks
+	* cfg.mk (local-checks-to-skip): Enable sc_require_config_h
+	and sc_require_config_h_first.
+	* src/dosbuf.c: Include <config.h>.
+	* src/vms_fab.c: Likewise.
+	* .x-sc_require_config_h: New file: list the exceptions.
+	* .x-sc_require_config_h_first: Likewise.
+
+	maint: use gnulib's progname module; enable set_program_name check
+	* bootstrap.conf (gnulib_modules): Add progname.
+	* src/grep.c: Include "progname.h".
+	(program_name): Remove declaration.
+	(main): Call set_program_name.
+	* cfg.mk (local-checks-to-skip): Add sc_program_name.
+
+	maint: enable "file system" check
+	* cfg.mk (local-checks-to-skip): Enable sc_file_system.
+	* lib/savedir.c (savedir): Tweak spelling.  Remove trailing blanks.
+
+	maint: enable immutable_NEWS check
+	* NEWS: Move copyright to the bottom.
+	Use the format required by release-related tools.
+	* .prev-version: New file.
+	* cfg.mk (old_NEWS_hash): Define.
+	(local-checks-to-skip): Enable check: sc_immutable_NEWS.
+
+	maint: disable the many failing syntax-checks
+	* cfg.mk: New file.
+	(local-checks-to-skip): Define to the list of disabled rules.
+	Subsequent change-sets will enable them, one by one.
+
+	build: require automake-1.11, enable silent-rules, parallel tests, xz
+	* configure.ac (AM_INIT_AUTOMAKE): Create xz-compressed tarballs,
+	not bzip2-compressed ones.  Enable automake's silent-rules,
+	parallel tests, and test PASS/FAIL coloring options.
+	Use AC_CONFIG_HEADERS, not AM_CONFIG_HEADER.  Quote the argument.
+
+	build: use git-version-gen for inter-release version strings
+	* configure.ac (AC_INIT): Use git-version-gen.
+
+	build: add several build- and release-related gnulib modules
+	* bootstrap.conf (gnulib_modules): Add announce-gen update-copyright
+	do-release-commit-and-tag git-version-gen gnu-web-doc-update
+	gnupload maintainer-makefile useless-if-before-free
+
+	build: adapt to the newer closeout module from gnulib
+	* src/grep.c: Include "exitfail.h".
+	(main) [-q]: Set the global variable, exit_failure, rather than
+	calling the now-removed close_stdout_set_file_name function.
+
+	build: adapt to the newer exclude API we now get from gnulib
+	* src/grep.c (main): Adapt to newer exclude.c: add EXCLUDE_WILDCARDS as
+	the new "option" argument in calls to add_exclude and add_exclude_file.
+
+	build: get more lib/* files from gnulib, adjust savedir
+	* bootstrap.conf (gnulib_modules): Add the following:
+	closeout exclude hard-locale isdir strtoumax.
+	* lib/.gitignore, m4/.gitignore: Update.
+	* lib/closeout.c, lib/closeout.h: Remove.
+	* lib/exclude.c, lib/exclude.h: Remove.
+	* lib/hard-locale.c, lib/hard-locale.h: Remove.
+	* lib/strtoumax.c: Remove.
+	* lib/isdir.c: Remove.
+	* lib/Makefile.am: Remove here, too.
+	* lib/savedir.c: Adapt to new exclude module:
+	s/excluded_filename/excluded_file_name/ and remove 3rd argument.
+
+	build: update gnulib submodule to latest
+
+	maint: generate ChangeLog from git logs
+	* Makefile.am (dist-hook, gen-ChangeLog): New rules.
+	* bootstrap.conf (gnulib_modules): Add gitlog-to-changelog.
+	Ensure that ChangeLog exists.
+	* ChangeLog-2009: Rename from ChangeLog
+	* ChangeLog: Remove file.
+	* .gitignore: Add ChangeLog.
+
+	maint: list gnulib modules one per line
+	* bootstrap.conf (gnulib_modules): List them one per line.
+
+2009-11-29  Tony Abou-Assaleh  <taa@acm.org>
+
+	Acknowledge new maintainers, update README-alpha
+	* AUTHORS: new maintainers added
+	* THANKS: same
+	* README-alpha: change CVS references to Git
diff --git a/src/grep/ChangeLog-2009 b/src/grep/ChangeLog-2009
new file mode 100644
index 0000000..c7d45cc
--- /dev/null
+++ b/src/grep/ChangeLog-2009
@@ -0,0 +1,3653 @@
+2009-11-26  Paolo Bonzini  <bonzini@gnu.org>
+
+	* bootstrap.conf: Add binary-io, dirname.
+	* configure.ac: Remove check for setmode, AC_DOSFILE.
+	* m4/dosfile.m4: Remove.
+	* src/grep.c: Adjust for dirname.h.
+	* src/system.h: Adjust for new gnulib modules.
+
+2009-11-26  Paolo Bonzini  <bonzini@gnu.org>
+
+	* bootstrap.conf: Add gnulib modules for replacement functions and
+	headers.
+	* configure.ac: Remove macros subsumed by gnulib.
+	* lib/hard-locale.c: Remove guards for headers/functions provided by gnulib.
+	* lib/regex.c: Likewise.
+	* lib/savedir.c: Likewise.
+	* src/dfa.c: Likewise.
+	* src/grep.c: Likewise.
+	* src/mbsupport.h: Likewise.
+	* src/system.h: Likewise.
+
+	* src/dfa.h: Do not look at PROTOTYPES.
+
+	* m4/mbstate_t.m4: Remove.
+	* src/getpagesize.h: Remove.
+
+2009-11-26  Paolo Bonzini  <bonzini@gnu.org>
+
+	* bootstrap.conf: Add gnulib modules and build libgreputils.a.
+	* configure.ac: Remove macros subsumed by gnulib.
+	* lib/Makefile.am: Remove files subsumed by gnulib.
+	* lib/alloca.c: Remove.
+	* lib/atexit.c: Remove.
+	* lib/error.c: Remove.
+	* lib/error.h: Remove.
+	* lib/fnmatch.c: Remove.
+	* lib/fnmatch.h: Remove.
+	* lib/getopt.c: Remove.
+	* lib/getopt.h: Remove.
+	* lib/getopt1.c: Remove.
+	* lib/gettext.h: Remove.
+	* lib/malloc.c: Remove.
+	* lib/memchr.c: Remove.
+	* lib/obstack.c: Remove.
+	* lib/obstack.h: Remove.
+	* lib/quotearg.c: Remove.
+	* lib/quotearg.h: Remove.
+	* lib/realloc.c: Remove.
+	* lib/stpcpy.c: Remove.
+	* lib/strtol.c: Remove.
+	* lib/strtoul.c: Remove.
+	* lib/strtoull.c: Remove.
+	* lib/xalloc.h: Remove.
+	* lib/xmalloc.c: Remove.
+	* lib/xstrtol.c: Remove.
+	* lib/xstrtol.h: Remove.
+	* lib/xstrtoumax.c: Remove.
+	* m4/error.m4: Remove.
+	* m4/inttypes_h.m4: Remove.
+	* m4/malloc.m4: Remove.
+	* m4/realloc.m4: Remove.
+	* m4/uintmax_t.m4: Remove.
+	* m4/ulonglong.m4: Remove.
+	* m4/xstrtoumax.m4: Remove.
+	* src/system.h: Remove strerror, sys_nerr, sys_errlist.
+
+2009-11-26  Paolo Bonzini  <bonzini@gnu.org>
+
+	* bootstrap: Use gnulib's build-aux/bootstrap.
+	* configure.ac: Add gl_INIT and gl_EARLY.
+
+2009-11-26  Paolo Bonzini  <bonzini@gnu.org>
+
+	* configure.ac: Bump AC_PREREQ to 2.59.
+
+2009-11-26  Paolo Bonzini  <bonzini@gnu.org>
+
+	* lib/savedir.c: Do not use NAMLEN.
+
+2009-11-21  Paolo Bonzini  <bonzini@gnu.org>
+
+	* configure.ac: Remove AC_SEP.
+	* m4/envsep.m4: Remove.
+
+2009-11-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	* configure.ac: Do not generate lib/posix/Makefile.
+	* lib/Makefile.am: Remove SUBDIRS.
+	* lib/posix/Makefile.am: Remove.
+	* lib/posix/regex.h: Overwrite...
+	* lib/regex.h: ... this.
+
+2009-11-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	* doc/Makefile.am: Remove AUTOMAKE_OPTIONS.
+	* lib/posix/Makefile.am: Remove AUTOMAKE_OPTIONS.
+	* vms/Makefile.am: Remove AUTOMAKE_OPTIONS.
+
+2009-11-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	* Makefile.cvs: Remove.
+
+2009-11-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	* m4/largefile.m4: Remove.
+	* m4/lib-ld.m4: Remove.
+	* m4/lib-prefix.m4: Remove.
+	* m4/missing.m4: Remove.
+	* m4/nls.m4: Remove.
+	* m4/progtest.m4: Remove.
+
+2009-11-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	* bootstrap: Add autopoint invocation and fetching of .po files.
+	* configure.ac: Bump to GNU gettext 0.17.
+
+	* ABOUT-NLS: Remove.
+	* m4/gettext.m4: Remove.
+	* m4/iconv.m4: Remove.
+	* m4/lib-link.m4: Remove.
+	* m4/po.m4: Remove.
+	* po/*.po: Remove.
+
+2009-11-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	* autogen.sh: Rename to...
+	* bootstrap: ... this.
+
+2009-11-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	* bootstrap/*: Remove.
+	* configure.ac: Do not create bootstrap/Makefile.
+	* Makefile.am: Do not recurse into bootstrap, distribute new files.
+	* Makefile.boot: Move from bootstrap/Makefile.try.
+	* README-boot: Move from bootstrap/README.
+
+2009-11-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	* lib/Makefile.am: Distribute gettext.h.
+	* lib/closeout.c: Use it.
+	* lib/gettext.h: New.
+	* lib/quotearg.c: Use it.
+	* lib/xmalloc.c: Use it.
+	* src/dfa.c: Use it.
+	* src/system.h: Use it.
+
+2009-11-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	* configure.ac.in: Rename...
+	* configure.ac: ... to this.  Remove ALL_LINGUAS definition.
+	* autogen.sh: Generate po/LINGUAS instead of configure.ac.
+
+2009-11-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	* configure.ac.in: Remove pointless (?) stamp-h rule.
+
+2009-11-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	* configure.ac.in: Remove m4/Makefile creation.
+	* Makefile.am: Remove m4 subdirectory.
+	* m4/Makefile.am: Remove.
+	* m4/codeset.m4: Remove.
+	* m4/glibc.m4: Remove.
+	* m4/glibc21.m4: Remove.
+	* m4/header.m4: Remove.
+	* m4/install.m4: Remove.
+	* m4/isc-posix.m4: Remove.
+	* m4/lcmessage.m4: Remove.
+	* m4/sanity.m4: Remove.
+
+2009-11-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	* configure.ac.in (AM_GNU_GETTEXT_VERSION): Bump to 0.17.
+	* Makefile.am (EXTRA_DIST): Add build-aux/config.rpath.
+	* intl/*: Remove.
+	* m4/gettext.m4: Upgrade to gettext-0.17.
+	* m4/iconv.m4: Upgrade to gettext-0.17.
+	* m4/lib-ld.m4: New file, from gettext-0.17.
+	* m4/lib-link.m4: New file, from gettext-0.17.
+	* m4/lib-prefix.m4: New file, from gettext-0.17.
+	* m4/nls.m4: New file, from gettext-0.17.
+	* m4/po.m4: New file, from gettext-0.17.
+	* m4/progtest.m4: Upgrade to gettext-0.17.
+	* m4/Makefile.am (EXTRA_DIST): Add the new files.
+	* po/Makefile.in.in: Upgrade to gettext-0.17.
+	* po/Makevars: New.
+	* po/cat-id-tbl.c: New.
+	* src/Makefile.am: Replace @INTLLIBS@ with @LIBINTL@.
+
+2009-11-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	* configure.ac.in: Test for limits.h, locale.h, stddef.h, mempcpy
+	and setlocale, though already done implicitly via AM_GNU_GETTEXT.
+
+2009-11-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	* bootstrap/Makefile.try: Adjust.
+	* lib/savedir.c: Avoid using stpcpy, so that bootstrapping does not
+	need it.
+
+2009-11-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	* configure.ac: Slightly modernize.
+	* Makefile.am: Modernize, use dependencies.
+	* Makefile.am: Modernize, use dependencies.
+	* lib/Makefile.am: Remove ansi2knr.
+	* src/Makefile.am: Remove ansi2knr.
+
+	* .gitignore: Add INSTALL
+	* build-aux/.gitignore: New.
+
+2009-11-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	* autogen.sh: Remove what is useless with git.
+
+2009-02-10  Tony Abou-Assaleh <taa@acm.org>
+
+	* po/*.po: update from the Translation Project
+
+	* configure.ac.in: update version to 2.6-cvs
+
+2009-02-02  Karl Berry  <karl@tug.org>
+
+	* configure.ac.in (pcre): set CPPFLAGS, not CFLAGS.
+
+2009-02-01  Tony Abou-Assaleh <taa@acm.org>
+
+	* po/*.po: update from the Translation Project
+
+	* po/Makefile.in.in: Remove deleted file ChangeLog from DISTFILES
+
+	* configure.ac.in: Replace obsolete macro AC_OUTPUT with modern equivalent
+
+2009-02-01  Karl Berry  <karl@tug.org>
+
+	* missing: re-add (from gnulib), since it's missing.
+
+	* src/grep.c (usage): consistent punctuation.
+
+2009-01-31  Tony Abou-Assaleh <taa@acm.org>
+
+	* m4/*.m4: quote underquoted definitions
+	* m4/codeset.m4: serial AM1 -> serial 1
+	* m4/iconv.m4: serial AM2 -> serial 2
+	* m4/header.m4: m4_regexp -> m4_bregexp, m4_patsubst -> m4_bpatsubst
+
+2009-01-29  Karl Berry  <karl@gnu.org>
+
+	* src/grep.c (usage): mention gnu.org/s/grep and gnu.org/gethelp.
+
+        Update and/or add copyright notices:
+        * ABOUT-NLS
+        * AUTHORS
+        * ChangeLog
+        * Makefile.am
+        * NEWS
+        * README
+        * README-alpha
+        * README.DOS
+        * THANKS
+        * autogen.sh
+        * configure.ac.in
+        * bootstrap/Makefile.am
+        * bootstrap/Makefile.try
+        * bootstrap/README
+        * doc/Makefile.am
+        * doc/grep.texi
+        * lib/Makefile.am
+        * m4/Makefile.am
+        * po/POTFILES.in
+        * src/Makefile.am
+        * src/dfa.h
+        * src/dosbuf.c
+        * src/grep.h
+        * src/kwset.c
+        * src/kwset.h
+        * src/mbsupport.h
+        * src/search.c
+        * src/system.h
+        * src/vms_fab.c
+        * src/vms_fab.h
+        * tests/Makefile.am
+        * tests/backref.sh
+        * tests/bre.awk
+        * tests/bre.sh
+        * tests/empty.sh
+        * tests/ere.awk
+        * tests/ere.sh
+        * tests/file.sh
+        * tests/fmbtest.sh
+        * tests/foad1.sh
+        * tests/khadafy.sh
+        * tests/options.sh
+        * tests/pcre.sh
+        * tests/spencer1.awk
+        * tests/spencer1.sh
+        * tests/spencer2.sh
+        * tests/status.sh
+        * tests/tests
+        * tests/warning.sh
+        * tests/yesno.sh
+                * vms/Makefile.am
+        * vms/config_vms.h
+
+        * po/ChangeLog: remove this file, just a bit of ancient cruft.
+
+2009-01-25  Tony Abou-Assaleh <taa@acm.org>
+
+        * README: updated "KNOWN BUGS" section
+
+2009-01-24  Bruno Haible  <bruno@clisp.org>
+
+        * lib/posix/regex.h (__restrict, __restrict_arr): Remove macros.
+          (_Restrict_, _Restrict_arr_): New macros. From gnulib/lib/regex.h.
+          (regcomp, regexec): Update declarations to use them.
+
+        * lib/savedir.c (isdir): New declaration.
+
+        * src/dfa.c (update_mb_len_index): Change argument type to
+          'char const *'.
+          (match_mb_charset): Cast argument to strncpy.
+          (dfaexec): Add pointer cast.
+
+        * src/grep.c (parse_grep_colors): Add braces for disambiguation.
+
+        * src/kwset.c: Include xalloc.h instead of declaring xmalloc manually.
+
+2009-01-20  Tony Abou-Assaleh <taa@acm.org>
+
+        * tests/foad1.sh: disable tests that fail under cs_CZ.UTF-8.
+        * tests/fmbtest.sh: likewise
+        * README: added "KNOWN BUGS" section
+        * src/grep.c: updated copyright year
+
+2008-12-12  Karl Berry  <karl@gnu.org>
+
+        * doc/grep.texi (Exit Status, grep Programs): move these
+          nodes to under Invoking.
+
+        * doc/grep.texi: remove all remaining node pointers;
+          downcase cindex entries.
+
+2008-12-11  Karl Berry  <karl@gnu.org>
+
+        * doc/grep.texi (Copying): update url's.
+          (GNU General Public License): remove node.
+          (GNU Free Documentation License): @include fdl.texi instead.
+          (@copying): update to v1.3 or later.
+        * doc/fdl.texi: new file, copied from
+          https://www.gnu.org/licenses/fdl.texi.
+        * doc/Makefile.am (grep_TEXINFOS): new variable to get fdl.texi.
+          Also add usual GPL license statement.
+
+        * doc/grep.texi (Index): Merge in Concept Index node,
+          to have only one index.  Arrange @syncodeindex's accordingly.
+
+2008-12-10  Karl Berry  <karl@gnu.org>
+
+        * doc/grep.texi (@copying): use @copying; move @contents to
+          beginning; rearrange other frontmatter in the conventional ways.
+
+2008-06-15  Tony Abou-Assaleh <taa@acm.org>
+
+        * src/ansi2knr.[1c]: Remove generated files (installed by
+          automake). Thanks to Emanuele Giaquinta for this.
+
+2008-02-14  Tony Abou-Assaleh <taa@acm.org>
+
+        * src/grep.c: Factor out copyright year in --version. Thanks to
+          Karl Berry for this.
+        * src/grep.c: Update copyright years
+
+        * po/POTFILES.in: +src/system.h +lib/closeout.c +lib/regex.c
+          +lib/xmalloc.c -lib/getopt1.c
+
+2008-02-09  Tony Abou-Assaleh <taa@acm.org>
+
+        * src/dfa.c: Replace a MALLOC and for loop with a CALLOC.  Thanks to
+          Johan Walles for this. Patch #6288
+
+        * README-alpha: more info about CVS code
+        * README: pointer to README-alpha
+
+        * src/grep.c: Update grep copyright year
+
+2008-02-08  Reuben Thomas <rrt@sc3d.org> (tiny change)
+
+        * .cvsignore: add configure.ac
+        * src/.cvsignore: add .deps
+
+2008-02-06  Tony Abou-Assaleh <taa@acm.org>
+
+        * tests/foad1.sh: Comment out cases that are known to fail. These
+      should be uncommented after the 2.5.4 release.
+        * tests/yesno.sh: Likewise.
+        * doc/grep.1: Update description of -e PATTERN; from Benno Schulenberg
+        * doc/grep.texi: Likewise.
+
+2007-11-19  Tony Abou-Assaleh <taa@acm.org>
+
+        * m4/Makefile.am: Remove reference strerror_r.m4
+
+2007-11-16  Tony Abou-Assaleh <taa@acm.org>
+
+        * po/sk.po: updated from the translation project
+
+2007-11-03  Tony Abou-Assaleh <taa@acm.org>
+
+        * po/*.po: get latest translations
+        * po/no.po: removed
+        * po/ky.po: added
+        * po/sk.po: added
+
+2007-10-10  Tony Abou-Assaleh <taa@acm.org>
+
+        * configure.ac.in: update version to 2.6-dev
+
+        * src/grep.c: update --version message
+
+2007-10-07  Tony Abou-Assaleh <taa@acm.org>
+
+        * src/grep.c: When -h and -H are combined, use the last specified,
+          Bug #15620, Patch #4866
+        * tests/foad1.sh: add tests for -h and -H
+
+        * ChangeLog: Add a copyright notice (years taken from commit logs),
+          add a license notice (taken from gnulib ChangeLog)
+
+        * TODO: update the link to a list of other grep implementations
+
+2007-06-29  Bernhard Rosenkraenzer <bero@arklinux.org>
+
+        * all files: GPLv3
+        * configure.ac.in: Change version number
+
+2006-11-25  Bernhard Rosenkraenzer <bero@arklinux.org>
+
+        * configure.ac.in: Update version number for post-2.5.2 development
+
+2006-11-25  Bernhard Rosenkraenzer <bero@arklinux.org>
+
+        * configure.ac.in, grep.spec: Update version number
+
+        * Makefile.cvs: Update to work with current autoconf scripts
+
+        * po/Makefile.in.in: Adjust to work with automake 1.1x
+
+2006-08-19  Bernhard Rosenkraenzer <bero@arklinux.org>
+
+        * po/*: Sync with translation project
+
+        * doc/*: Assorted documentation updates, Patch #4610
+
+        * autogen.sh, configure.in, configure.ac.in: Autogenerate
+          ALL_LINGUAS variable
+
+        * m4/strerror_r.m4, configure.ac.in: Fix detection of strerror_r
+
+        * lib/error.c: Remove bogus warning
+
+        * lib/savedir.c, lib/savedir.h, src/grep.c, doc/*:
+          Add --exclude-dir option (patch #5051)
+
+2005-11-18  Charles Levert  <charles_levert@gna.org>
+
+        * tests/foad1.sh: Use ": ${VERBOSE=}" so that the caller can
+          set it without modifying the script; the usual caller (Makefile)
+          still leaves it untouched (usually unset, so it's off by default).
+          Modify "-m1 -A99 '^...$'" tests that failed so that their
+          expectation now corresponds to the output currently produced
+          by grep.  Those tests used to expect that two selected (or
+          selectable) lines be output, even with -m1.  Nothing was
+          modified with other similar tests that output _context_ lines
+          after one selected line has been output with -m1; they used to
+          and still succeed.  Although tests/yesno.sh now provides a more
+          comprehensive framework for testing -m/-C feature interaction,
+          it doesn't exercise mixing them with anchors so the whole
+          relevant tests/foad1.sh test group is kept, notably to check
+          that grep doesn't crash when it is run.
+
+2005-11-17  Charles Levert  <charles_levert@gna.org>
+
+        On 2005-06-21, many changes were made that affected --color,
+        --only-matching, and --invert-match.  Some of them introduced a
+        misunderstanding between the concepts of matched/non-matched and
+        selected/rejected lines.  Furthermore, a few bugs with -v sneaked
+        in stemming from this.  This set of changes aims to rectify most
+        of this situation.  Some GREP_COLORS capabilities are also added
+        as a result of the clarification.  (Further issues with -v/-o/-C
+        feature interaction still remain to be sorted out.)
+
+        * src/grep.c: Rename/add global variables, macros, and capabilities:
+            SEP_CHAR_MATCH    -->  SEP_CHAR_SELECTED
+            SEP_CHAR_CONTEXT  -->  SEP_CHAR_REJECTED
+            SEP_STR_CHUNK     -->  SEP_STR_GROUP
+            grep_color        -->  selected_match_color + context_match_color
+            mlines_color      -->  selected_line_color
+            context_color     -->  context_line_color
+            "ml"              -->  "sl"
+            "mt"              -->  "mt" = "ms" + "mc"
+                              -->  "rv" (reverse "sl"/"cx" when -v)
+        * src/grep.c (color_cap_mt_fct, color_cap_rv_fct): New functions.
+        * src/grep.c (print_line_tail): Renamed color argument to line_color.
+        * src/grep.c (print_line_middle, prline): Revert part of the logic to
+          a pre-2005-06-21 one so that lines with matches have their matched
+          parts properly handled again ("m?" colors or --only-matching),
+          whether or not -v is specified.  Whole line colors ("sl", "cx")
+          follow a selected / rejected(context) logic, as opposed to a
+          matched / non-matched one (unless "rv").  Matched text colors ("ms",
+          "mc") always follow a selected / rejected(context) logic,
+          regardless of "rv", because only matched lines use them anyway.
+          pr_line_middle() now takes additional line_color and match_color
+          arguments computed by prline() prior to calling that function.
+          The old logic was a buggy hybrid matched / rejected(context) one.
+        * src/grep.c (prpending, prtext, grepfile): Renamed macro invocations.
+        * src/grep.c (parse_grep_colors): Update top comment.
+        * src/grep.c (main): GREP_COLOR (singular) now sets both
+          selected_match_color and context_match_color.
+
+2005-11-16  Charles Levert  <charles_levert@gna.org>
+
+        * src/search.c (Pcompile): Clarify message for the -P option
+          not being supported so that users don't assume it's a run-time
+          problem, but know that it's a compile-time configuration choice.
+          Based on an idea by:  Benno Schulenberg <benno@nietvergeten.nl>.
+
+2005-11-13  Charles Levert  <charles_levert@gna.org>
+
+        * tests/yesno.sh: New file.  Test feature interaction
+          of -C, -v, -o, and -m.  This reveals bugs, including some I
+          introduced on 2005-06-21, but also others.
+        * tests/Makefile.am (TESTS): Add yesno.sh.
+        * tests/Makefile.am (CLEANFILES): Add cspatfile and csinput, as
+          created by fmbtest.sh.  Add yesno.txt, as created by yesno.sh.
+
+2005-11-11  Charles Levert  <charles_levert@gna.org>
+
+        * configure.in (ALL_LINGUAS): Add languages that were missing
+          from this variable (bg, ca, da, nb, tr), but that GNU grep supports
+          with a po/xx.po file.  Reported by Tony Abou-Assaleh <taa@acm.org>.
+
+        * src/search.c (Pcompile): Abort in error if -P and multiple patterns
+          are specified, with an error message explaining the situation.
+          Fixing this won't be simple; the '\n' characters separating the
+          patterns cannot just be replaced by '|' to create an alternation as
+          back-references are assumed to be local to each individual pattern.
+
+        * src/grep.c (parse_grep_colors, main): Replace all uses of
+          fprintf(stderr, _("%s: foo\n"), program_name, ...) with
+          error(0, 0, _("foo"), ...) for uniformization and simplification
+          of warning messages that will be up for localization.  (My bad.)
+
+2005-11-10  Charles Levert  <charles_levert@gna.org>
+
+        The introduction of the --only-matching and --color GNU extensions
+        to grep added the requirement that each execute() implementation
+        not only be able to identify matching lines as a whole, but also
+        individual "exact" matches within a line known to be matching,
+        from leftmost to rightmost match, when the output from matching
+        lines is actually produced.  The interface and implementations
+        of execute() were not up to it.  This set of changes aims to
+        rectify that situation.  Previously failing tests relative to
+        left anchors (^ and \<) and -w should now pass.  This fixes
+        <https://savannah.gnu.org/bugs/?func=detailitem&item_id=11579>,
+        <https://savannah.gnu.org/patch/?func=detailitem&item_id=1834>,
+        <https://savannah.gnu.org/bugs/?func=detailitem&item_id=8243>,
+        and possibly part of other, bigger, pending patches.  The problem
+        was also compounded by the POSIX requirement to support a pattern
+        list instead of just an individual pattern (for -G and -E as well).
+
+        * tests/foad1.sh: Test for increasing/decreasing-length word
+          matches, given pattern order, and leftmost/longest match.
+        * tests/fmbtest.sh: Modify test #6 according to new expectations.
+          Better document what tests #6 and #7 are actually for.  Eliminate
+          test #5 in favor of bringing tests #6 and #7 within the F G E loop.
+        * src/grep.h (EXECUTE_ARGS): Change last argument from "int exact"
+          to "char const *start_ptr".  Testing for "start_ptr" being non-NULL
+          retains the same semantics as testing for "exact" being non-zero.
+        * src/grep.c (print_line_middle): Call execute() with whole
+          buffer to work on, but using current position as start_ptr.
+        * src/grep.c (prpending, grepbuf): Call execute() with NULL
+          as start_ptr.
+        * src/search.c (EGexecute, Fexecute, Pexecute): When start_ptr is
+          non-NULL, return first match from it as an offset relative to buf.
+        * src/search.c (EGexecute): Consider all patterns if many and,
+          for an exact match, return the best one (leftmost, then longest).
+          Don't explore worst solutions, of course (branch and bound).
+
+2005-11-10  Charles Levert  <charles_levert@gna.org>
+
+        * src/grep.c (main): Fix a subtle memory allocation bug introduced
+          with the mb_icase_keys() function, which can call xrealloc() or
+          free() on keys, by making sure keys is always dynamically allocated.
+
+2005-11-09  Charles Levert  <charles_levert@gna.org>
+
+        * doc/grep.1, doc/grep.texi: Advise users to test for
+          "exit_status > 1" instead of "exit_status == 2" in order to
+          detect errors, for portability with other POSIX-compliant
+          implementations.
+
+2005-11-09  Charles Levert  <charles_levert@gna.org>
+
+        The following set of changes aims to make "egrep" and "fgrep"
+        minimal executable programs for legacy applications, instead of
+        shell scripts.  This "fgrep" is much smaller than "grep".
+        This set of changes appears more daunting than it really is.
+
+        * src/egrep.c, src/fgrep.c, src/esearch.c, src/fsearch.c: New files
+          that #define either EGREP_PROGRAM or FGREP_PROGRAM and #include
+          the corresponding generic (i.e., non e or f specific) *.c file.
+        * src/grepmat.c: Remove whole file.
+        * src/Makefile.am: Remove no-dependencies from AUTOMAKE_OPTIONS.
+          Add definitions to make "egrep" and "fgrep" specific standalone
+          executable programs that only use the source files they need.
+          Remove rules for "egrep" and "fgrep" shell scripts.
+        * src/grep.h: #define GREP_PROGRAM if both EGREP_PROGRAM and
+          FGREP_PROGRAM are #undef.  Only declare matchers[] in this case
+          along with the compile_fp_t and execute_fp_t function pointers
+          typedefs, otherwise declare prototypes for straight compile()
+          and execute() functions for the specialized "egrep" and "fgrep"
+          programs.  Remove the extern declaration for matcher.
+          Define COMPILE_RET, COMPILE_ARGS, EXECUTE_RET, EXECUTE_ARGS,
+          COMPILE_FCT, and EXECUTE_FCT helper preprocessor macros.
+        * src/grep.c (short_options, long_options, usage, main): Only
+          support -G, -E, -F, -P, and -X for GREP_PROGRAM, but not for
+          EGREP_PROGRAM or FGREP_PROGRAM.  Customize usage messages.
+        * src/grep.c (set_limits): New function with unchanged code,
+          called from main(), because it shouldn't be in install_matcher()
+          since it was already matcher-independent.
+        * src/grep.c (matcher): Add as static, only for GREP_PROGRAM.
+        * src/grep.c (setmatcher, install_matcher): Only for GREP_PROGRAM.
+        * src/grep.c (main): Remove any tweaking and dependence on argv[0].
+        * src/grep.c (print_line_middle, prpending, grepbuf, main): Call
+          compile() and execute() directly, not through a function
+          pointer dereferencing notation, so that it works with both
+          straight functions (in EGREP_PROGRAM and FGREP_PROGRAM) and
+          function pointers (in GREP_PROGRAM).
+        * src/search.c (<regex.h>, "dfa.h", dfa, pattern0, patterns,
+          pcount, dfaerror, kwset_exact_matches, kwsmusts): Only
+          include/declare/define if not FGREP_PROGRAM.
+        * src/search.c: Remove function prototypes for all functions
+          that are not used before their definition, since this is just
+          a hassle now with their varying names and conditional definition.
+        * src/search.c (GEAcompile): Rename from Ecompile().  Add new
+          syntax_bits argument/variable.  Use as compile() for EGREP_PROGRAM.
+          Put in the needed RE_ICASE fix, albeit commented-out for now.
+          Make sure to free() modified word/line pattern after use, if any.
+        * src/search.c (Gcompile): Merge with GEAcompile() then remove.
+        * src/search.c (Gcompile, Acompile, Ecompile): New small functions
+          that call GEAcompile(), now that matcher is not an extern variable.
+        * src/search.c (GEAcompile, Gcompile, Acompile, Ecompile,
+          Fcompile, Pcompile, EGexecute, Fexecute, Pexecute, matchers):
+          Only define when needed according to *GREP_PROGRAM, and rename
+          to just compile() and execute() when appropriate.
+        * grep/bootstrap/Makefile.try: Similar changes.
+
+2005-11-08  Charles Levert  <charles_levert@gna.org>
+
+        * README.DOS, TODO, grep.spec, doc/grep.1, doc/grep.texi,
+          src/grep.h, po/da.po, po/nb.po, po/no.po, po/sv.po:
+          Replace all capitalized "Grep" by a lowercase "grep", except
+          in citations.  Reported by Benno Schulenberg <benno@nietvergeten.nl>
+          from the <https://bugs.debian.org/190551>
+          entry in the Debian bug tracker.
+        * doc/grep.1, doc/grep.texi: Explain that the "egrep" and "fgrep"
+          commands are deprecated and provided for historical applications.
+          Replace some "egrep" uses by "grep -E" to promote the newer usage.
+          Typeset "zgrep" as a command.  Fix some spacing and punctuation bugs.
+
+2005-11-08  Julian Foad  <julianfoad@btopenworld.com>
+
+        * doc/grep.texi: Rewrite a poorly written usage example about
+          back-references, and tweak another.  New text by Benno Schulenberg.
+
+2005-11-04  Charles Levert  <charles_levert@gna.org>
+
+        * src/grep.c (mb_icase_keys): New function to properly lowercase
+          keys if match_icase.  The problem was that some multi-octet
+          characters can get longer or shorter upon this conversion, so that
+          it cannot just naively be done in place on the same memory buffer.
+        * src/grep.c (main): Call mb_icase_keys (and remove in-line code).
+
+        * tests/foad1.sh:  Duplicate three "-o -b" tests for the "-F"
+          mode because it relies on a different code path that deserves
+          the same kind of testing.
+
+2005-09-27  Stepan Kasal  <kasal@ucw.cz>
+
+        * doc/grep.1: Fix a typo.
+
+2005-08-24  Charles Levert  <charles_levert@gna.org>
+
+        * src/grep.c (print_line_middle): In case of an empty match,
+          make minimal progress and continue instead of aborting process
+          of the remainder of the line, in case there's still an upcoming
+          non-empty match.
+        * tests/foad1.sh: Add two tests for this.
+        * doc/grep.texi, doc/grep.1: Document this behavior, since
+          --only-matching and --color are GNU extensions which are
+          otherwise unspecified by POSIX or other standards.
+
+2005-07-26  Charles Levert  <charles_levert@gna.org>
+
+        * tests/pcre.sh: New file.  Add test 1.
+        * tests/Makefile.am: Add pcre.sh to TESTS.
+
+2005-07-07  Charles Levert  <charles_levert@gna.org>
+
+        * src/grep.c: Remove all xm capability code.
+
+2005-07-05  Charles Levert  <charles_levert@gna.org>
+
+        * doc/grep.texi: Add missing green color in GREP_COLORS description.
+        * doc/grep.1: Fix typo and reorganize GREP_COLORS documentation.
+
+        * src/kwset.c (DEPTH_SIZE): New macro to anticipate
+          architectures/compilers where CHAR_BIT is not 8 (we assume it
+          won't be less than 4, which would be non-standard and unlikely).
+          Checked to hold for CHAR_BIT up to 1023 (and maybe more)!
+        * src/kwset.c (kwsincr): Use DEPTH_SIZE in two array declarations.
+
+        * src/kwset.c (kwsincr): When a second obstack_alloc() call fails,
+          free what the first one successfully allocated by popping it
+          off the top of the obstack, before returning in error, just
+          to keep things clean.
+        * src/kwset.c (kwsprep): Verify return value of obstack_alloc()
+          and return a memory exhausted error if so.  This function had
+          a prototype to return such errors, but never did.
+
+2005-07-04  Charles Levert  <charles_levert@gna.org>
+
+        * src/kwset.c: Readability changes.
+          Replace uses of 0 for pointer values by NULL.
+          Generalize use of existing U() macro to whole file.
+
+        * src/kwset.c (kwsprep): Use memset() and memcpy() when appropriate.
+
+        * src/kwset.c (kwsprep): Move three variable declarations to
+          the single {}-block where they are used.
+
+        * src/kwset.c (kwsprep): Optimize search for mind2 value by
+          starting from the end of the target[] array.
+
+2005-06-22  Charles Levert  <charles_levert@gna.org>
+
+        * grep/autogen.sh, grep/src/Makefile.am, grep/tests/backref.sh,
+          grep/tests/bre.sh, grep/tests/empty.sh, grep/tests/ere.sh,
+          grep/tests/file.sh, grep/tests/fmbtest.sh, grep/tests/foad1.sh,
+          grep/tests/khadafy.sh, grep/tests/options.sh,
+          grep/tests/spencer1.sh, grep/tests/spencer2.sh,
+          grep/tests/status.sh, grep/tests/warning.sh: As per autoconf's
+          "Portable Shell Programming" guidelines, replace all instances
+          of "#!/bin/sh" by "#! /bin/sh" (notice the space).
+
+2005-06-21  Charles Levert  <charles_levert@gna.org>
+
+        * src/grep.c (nlscan): Make this function more robust by removing
+          the undocumented assumption that its "lim" argument points
+          right after a line boundary.  This will be used later to fix
+          --byte-offset's broken behavior.  Patch #3769.
+
+        * src/grep.c (main): Add a test to check if -o/--only-matching
+          and context lines are both specified and if so, set both context
+          specifications (before and after) to zero then print an explicit
+          warning to stderr explaining what was done and why (as opposed
+          to drastically aborting the process in error).  Patch #3768.
+          Other code needs this zero setting to work correctly without
+          having to repeatedly test for this conflictual condition.
+
+        * tests/foad1.sh: Add tests combining -o, -n/-b/-H, and -i,
+          since there are separate code paths for -i.  Add tests combining
+          -o, -n/-b/-H, and -3, since any context line specification
+          should be ignored when combined with -o.
+        * src/grep.c (print_line_head): New function, culled off the
+          top content of prline().  Adds a guard against "lastnl" having
+          already reached "lim", which can happen when if the function
+          is called more than once per line.
+        * src/grep.c (prline): Now calls print_line_head(), not only at
+          the beginning to replace the moved code when -o is not
+          specified, but also for each match when -o is specified (two
+          code paths with this).  Patch #3770, more or less.  This makes
+          all tests combining -o and -n/-b/-H pass, which they didn't
+          before.  Fixes bug #12727.
+
+        * src/grep.c (SEP_CHAR_MATCH, SEP_CHAR_CONTEXT, SEP_STR_CHUNK):
+          New macros for ':', '-', and "--".  Used throughout the file.
+          Will be used even more in upcoming updates, so good to have now.
+
+        * src/grep.c: The new GREP_COLORS (plural) framework, only
+          partially used at this point to make for a simpler initial
+          patch in CVS.  A subset of patch #3644 on Savannah.
+        * src/grep.c (color_cap_ne_fct, color_cap_xm_fct, print_filename,
+          print_sep, parse_grep_colors): New functions.
+        * src/grep.c (prtext, grepfile, main): Existing functions modified
+          to use the new framework.
+        * doc/grep.texi, doc/grep.1: Document GREP_COLORS.
+
+        * src/grep.c: The new -T/--initial-tab framework, only
+          partially used at this point to make for a simpler initial
+          patch in CVS.  A subset of patch #3644 on Savannah.
+          The option name/calling convention is the same as for GNU diff.
+        * doc/grep.texi, doc/grep.1: Document -T/--initial-tab.
+
+        * src/grep.c (print_offset): Renamed print_offset_sep() to better
+          represent its new functionality; new calling convention.
+        * src/grep.c (print_offset, print_line_head): Use and implement
+          missing parts of the GREP_COLORS and -T/--initial-tab frameworks.
+
+        * src/grep.c (print_line_middle, print_line_tail): New functions,
+          unused for now, intended to allow a simplifying rewrite of
+          prline().  Adding them first will make for cleaner CVS patches.
+
+        * src/grep.c (prline): Simplifying rewrite using
+          print_line_middle() and print_line_tail().  No longer attempts
+          to find matches to colorize in context lines, thus avoiding
+          costly calls to (*execute)(), since we know by then that they
+          can't contain any by definition.  There are no longer four
+          different code paths whether -o and -i are each specified
+          or not; they have been unified into one, which should help
+          avoid bugs similar to previous ones due to not updating all
+          code paths in a synchronized fashion.  The -i code has been
+          explicitly marked since it doesn't belong there and should
+          be removed as soon as other -i code elsewhere is fixed.
+          The remaining GREP_COLORS functionality is implemented.
+          Savannah patch #3771 and patch #3644, heavily reworked.
+
+        * src/grep.c (color_cap_ne_fct, color_cap_xm_fct,
+          print_line_middle, print_line_tail): Make these four functions
+          static.
+
+2005-06-20  Charles Levert  <charles_levert@gna.org>
+
+        * src/grep.c: Extensively document the SGR/EL-to-Right issue.
+
+        * src/grep.c: Explain the context and logic for choosing default
+          --color screen attributes (SGR parameters).
+
+2005-06-15  Charles Levert  <charles_levert@gna.org>
+
+        * tests/foad1.sh: Since this script is run by /bin/sh, it
+          must work under posix mode.  That means not using assignment
+          statements right before a function call (LC_ALL=... grep_test,
+          in this case), because it won't do the expected thing.
+
+2005-06-14  Charles Levert  <charles_levert@gna.org>
+
+        Fix bug #11022 (Line wrapping causes GREP_COLOR background
+        color to "smear") by outputting a "clear to end of line"
+        control sequence after each SGR (Select Graphic Rendition)
+        control sequence (START and END).  This also avoid similar
+        problems with HT (tab) characters.
+
+        * src/grep.c (SGR_START, SGR_END, PR_SGR_FMT, PR_SGR_FMT_IF,
+          PR_SGR_START, PR_SGR_END, PR_SGR_START_IF, PR_SGR_END_IF):
+          New macros.
+        * src/grep.c (prline): Use the new macros.
+        * tests/fmbtest.sh, tests/foad1.sh: Adjust the regression tests
+          to expect the new control sequences.
+
+2005-05-06  Charles Levert  <charles_levert@gna.org>
+
+        * TODO: Add a few more projects and derived versions to check out.
+
+2005-05-05  Charles Levert  <charles_levert@gna.org>
+
+        * README-alpha: Document grep-commit mailing list.
+        * TODO: Add various stuff culled from the mailing list.
+
+2005-05-02  Charles Levert  <charles_levert@gna.org>
+
+        * 78 files: Update FSF's civic address, zip code,
+          and citizen relocation code.
+
+2005-04-29  Charles Levert  <charles_levert@gna.org>
+
+        * tests/foad1.sh: Add -b and tricky UTF-8 tests.
+          Display LC_ALL when its value is special.  Patch #3962.
+
+        * ABOUT-NLS: Sync with CVS revision 1.9
+          of 2005-04-13T11:21:55Z from GNU gettext
+          on ":pserver:anoncvs@sources.redhat.com:/cvs/gettext",
+          file "gettext/gettext-runtime/ABOUT-NLS".
+
+2005-04-29  Julian Foad  <julianfoad@btopenworld.com>
+
+        * Makefile.am: Remove reference to long-gone files PATCHES.AC and
+          PATCHES.AM.  Thanks to Tony Abou-Assaleh for this.  Patch #3961.
+
+2005-04-29  Charles Levert  <charles_levert@gna.org>
+
+        * src/grep.c: Fix typo in prline()'s --only-matching --ignore-case
+          code path; this fixes bug #9768 and passes one more test
+          in tests/foad1.sh.  This whole code path should be removed in
+          the future, when other --ignore-case issues are dealt with.
+
+2005-04-28  Julian Foad  <julianfoad@btopenworld.com>
+
+        * tests/foad1.sh: Remove Bash-specific syntax.
+
+        * src/dfa.c: Fix a DFA bug whereby a bracket "[" was matched by the
+          pattern "[[:alpha:]]" in UTF-8 locales.  Patch #3800, by Tim Waugh.
+        * tests/foad1.sh: Add a regression test for that.
+
+2005-04-27  Julian Foad  <julianfoad@btopenworld.com>
+
+        Fix a bug reported by Elliott Hughes in patch #1834 whereby "grep -Fw"
+        would miss matches after a non-word occurrence of the pattern.  Fix by
+        Gordon Lack; tests based on reproduction recipes by Gordon Lack.
+
+        * src/search.c (Fexecute): Fix the "match_words" case.
+        * tests/foad1.sh: Modify the test framework so that the "PATTERN"
+          argument is optional.  Add a regression test and a test for
+          a similar case that other proposed patches have got wrong.
+
+        Add more tests, some initially failing.
+
+        * tests/foad1.sh: Add tests for "--color", most initially failing.
+        * tests/fmbtest.sh: New file of tests for "grep -i" with multi-byte
+          chars, by Jakub Jelinek, from patch #3808: Red Hat's "tests" patch.
+          Initially, test #4 fails (in all three modes).
+        * tests/Makefile.am: Include the new tests file "fmbtest.sh".
+
+2005-04-12  Julian Foad  <julianfoad@btopenworld.com>
+
+        * tests/bre.tests: Enable a regression test for bug #9519.
+        * src/grep.c: Fix a seg-fault in "-o -i": patch #1939.
+        * tests/foad1.sh: New tests for "-o", initially all failing.
+        * tests/Makefile.am: Include the new tests file "foad1.sh".
+        * tests/spencer2.sh: Be consistent with "spencer1.sh" in the
+          naming of associated files.
+        * src/grep.c: Fix off-by-one error in prpending().
+          Patch #3840 by Claudio Fontana.
+        * tests/foad1.sh: Add tests by Pavol Gono for patch #3840.
+          Some of them still fail, but no longer seg-fault due to that bug.
+
+2005-04-11  Julian Foad  <julianfoad@btopenworld.com>
+
+        * doc/grep.texi, doc/grep.1: Document USG grep -s too.
+          Based on a patch by Paul Eggert; suggested by Keith Marshall.
+        * src/dfa.c (lex): Fix bug #9519: "echo do^re | grep do^re" was
+          failing to find a match.
+
+2005-03-09  Stepan Kasal  <kasal@ucw.cz>
+
+        * src/search.c (EGexecute, Fexecute): Use xmalloc, not malloc.
+        (EGexecute): Handle the failure in one place, goto there.
+
+2005-02-26  Stepan Kasal  <kasal@ucw.cz>
+
+        * src/grep.c (get_nondigit_option): Don't give up too early.
+        * src/search.c (Pexecute): Add a comment explaining that this
+          situation should not happen.
+
+2005-02-22  Claudio Fontana  <sick_soul@users.sourceforge.net>  (tiny change)
+
+        * src/search.c (Pexecute): Consider eof case when delimiting
+          matching line.  Fixes bug #4531.
+
+2005-02-23  Julian Foad  <julianfoad@btopenworld.com>
+
+        * po/ko.po: Fix email address.
+        * README-alpha: Fix email addresses and clarify the notes.
+        * tests/backref.sh: Fix trivial typos.
+
+2005-02-08  Bruno Haible  <bruno@clisp.org>  (tiny change)
+
+        * src/kwset.h (kwsincr, kwsprep): Change return type to 'const char *'.
+        * src/kwset.c (kwsincr, kwsprep): Likewise.
+
+2005-02-08  Arnold D. Robbins  <arnold@skeeve.com>
+            Stepan Kasal  <kasal@ucw.cz>
+
+        * src/mbsupport.h: Don't say the file is part of GAWK.
+        Make wording in explanatory comment more generic.
+
+2005-02-07  Stepan Kasal  <kasal@ucw.cz>
+
+        * src/grep.c: Document that -X is undocumented.
+
+2005-01-16  Bruno Haible  <bruno@clisp.org>  (tiny change)
+            Stepan Kasal  <kasal@ucw.cz>
+
+        * configure.in: Add tests for iswctype, mbrlen, wcrtomb, wcscoll;
+          use AC_FUNC_MBRTOWC to check for mbrtowc and mbstate_t; move
+          AC_MBSTATE_T below it.
+        * src/grep.c: Include mbsupport.h to define MBS_SUPPORT uniformly.
+        * src/mbsupport.h: Don't test for HAVE_WCTYPE_T.
+
+2005-01-13  Arnold D. Robbins  <arnold@skeeve.com>
+
+        * src/dfa.c (dfaparse): Use LC_COLLATE whenever it is defined;
+          ENABLE_NLS has nothing to do with this.
+
+2005-01-07  Stepan Kasal  <kasal@ucw.cz>
+
+        * tests/status.sh: Added two tests--option '-s' should have no
+          influence on the exit status.
+
+2004-12-16  Stepan Kasal  <kasal@ucw.cz>
+
+        Cosmetic changes, mostly imported from gawk:
+
+        * src/dfa.c (lexstart): Removed unused variable.
+        (parse_bracket_exp_mb): Don't initialize different pointers in one
+          assignment
+        (lex): Don't initialize automatic arrays, it's invalid in pre-C89
+          compilers.
+        Various other typos.
+        * src/dfa.h, src/grep.c, src/search.c: Typos.
+
+2004-12-16  Isamu Hasegawa  <isamuh@jp.ibm.com>
+
+        From http://oss.software.ibm.com/linux/patches/?patch_id=25
+
+        * src/search.c: Patch for i18n correctness.
+        * src/grep.c: Likewise.
+        * src/dfa.c: Likewise.
+        * lib/regex.c: Likewise.
+
+2004-12-15  Julian Foad  <julianfoad@btopenworld.com>
+
+        Changes to documentation and help text, mostly from Stepan Kasal.
+
+        * doc/grep.texi: Minor fixes of phrasing.
+        * doc/grep.1: Likewise.
+        * src/grep.c: Likewise.
+
+2004-12-01  Stepan Kasal  <kasal@ucw.cz>
+
+        * src/grep.c (usage): Use "FILE_PATTERN" for --include and --exclude,
+          change "only print" to "print only".
+        * doc/grep.1: Likewise; state that wildcard matching is used.
+          Move some options so that they are sorted alphabetically.
+        * dfa.c, NEWS: Fix typos.
+
+2004-11-28  Benno Schulenberg  <benno@nietvergeten.nl>  (tiny change)
+
+        * src/grep.c (usage): Clean up several details in the usage string.
+        * doc/grep.1: Fix descriptions of --include and --exclude.
+        * doc/grep.texi: Likewise.
+
+2004-11-23  Stepan Kasal  <kasal@ucw.cz>
+
+        * src/Makefile.am: The egrep and fgrep script now use their own
+        path to construct the full pathname of grep.
+
+2004-11-23  Stepan Kasal  <kasal@ucw.cz>
+
+        * src/Makefile.am: Merged the rules for creating the egrep and
+        fgrep script.
+
+2004-11-23  Stepan Kasal  <kasal@ucw.cz>
+
+        * src/grep.c (usage): Make sure both copies of the "usage"
+          strings match.  Add "(C)" to the copyright notice.
+        * src/dfa.c: Changed "out of memory" to "memory exhausted" to
+          match messages elsewhere in the source.
+
+2004-11-22  Stepan Kasal  <kasal@ucw.cz>
+
+        * src/search.c: Use mbsupport.h .
+        * src/dfa.c: Move the inclusion of mbsupport.h lower.
+
+2004-11-22  Stepan Kasal  <kasal@ucw.cz>
+
+        * src/grep.c (main): Use PACKAGE_STRING for --version.
+
+2004-11-20  Benno Schulenberg  <benno@nietvergeten.nl>  (tiny change)
+
+        * src/grep.c (reset): Move the stat check ...
+        (grepfile): ... here, and also check for a fifo.
+
+2004-11-20  Stepan Kasal  <kasal@ucw.cz>
+
+        This change is based on a suggestion by Elliott Hughes.
+
+        * src/grep.c (usage): Use PACKAGE_BUGREPORT.
+        * po/*.po: Hacked the current translation again.
+
+2004-11-20  Stepan Kasal  <kasal@ucw.cz>
+
+        * configure.in: Added a copyright notice (using gawk as a template).
+        (AC_INIT, AM_INIT_AUTOMAKE): Changed to the "new" form so that
+          the PACKAGE_* symbols get defined correctly in config.h.
+
+2004-11-20  Stepan Kasal  <kasal@ucw.cz>
+
+        * ./cvsignore: Amended several .cvsignore files and
+          removed *.gmo, acinclude.m4 and stamp-h.in from the root one.
+        * m4/init.m4: Nuked, it was breaking current automake.
+        * m4/Makefile.m4: Removed init.m4.
+        * autogen.m4: Drop support for legacy autoconf; tell whether the
+          auto tools exited successfully or not; fix the permissions of
+          tests/*.sh--CVS doesn't provide a way to fix it.
+
+2004-11-19  Stepan Kasal  <kasal@ucw.cz>
+
+        * src/dfa.c: Removed old version of gofast patch, from 2003-05-30.
+        * src/search.c (check_multibyte_string): Likewise.
+
+2004-11-19  Stepan Kasal  <kasal@ucw.cz>
+
+        * src/dfa.c: Added some simple changes from gawk.
+        * src/mbsupport.h: Imported from gawk.
+
+2004-11-11  Stepan Kasal  <kasal@ucw.cz>
+
+        * tests/spencer1.awk: Use only lines with 3 fields.
+        * tests/spencer1.tests: Disable #55 for now.
+        * tests/ere.tests, tests/bre.tests: Add "TO CORRECT" to disabled
+          tests which had empty $4.
+        * tests/backref.sh: Modify #2 so that current glibc regex can
+          handle it in finite time.
+
+2004-11-12  Stepan Kasal  <kasal@ucw.cz>
+
+        Change bug-gnu-utils address to bug-grep, on many places; there
+        is no need to have the word "grep" in subject then.
+        Thanks to Tony Abou-Assaleh and Benno Schulenberg for pointing
+        out this.
+
+2004-11-02  Stepan Kasal  <kasal@ucw.cz>
+
+        * README-alpha: Remove obsolete instructions about CVS, redirect
+          the reader to savannah web.
+
+2004-09-26  Stepan Kasal  <kasal@ucw.cz>
+
+        * src/search.c (check_multibyte_string, Gcompile, Ecompile): Replace
+          malloc with xmalloc.
+        * src/dfa.c (dfamust): Replace two calls to 'malloc' by MALLOC.
+
+2003-07-23  Stepan Kasal  <kasal@ucw.cz>
+
+        * src/Makefile.am: Add the egrep and fgrep scripts to CLEANFILES.
+
+2003-07-23  Stepan Kasal  <kasal@ucw.cz>
+        * tests/backref.sh: Messages fixed.
+
+2003-07-08  David Kaelbling  <drk@sgi.com>  (tiny change)
+        * src/dfa.c: remove non-constant initializers from dfa.c
+
+2003-06-16  Stepan Kasal  <kasal@ucw.cz>
+        * doc/grep.1: two typos "--line-buffered [...] penalty"
+        * doc/grep.texi: a typo
+
+2003-06-12  Bernhard Rosenkraenzer <bero@arklinux.org>
+        * README-alpha: Mention bug tracking system and grep-devel-list
+        * tests/spencer1.tests: Fix test 55, as noted by Tim Waugh
+        * src/search.c: Speed up multibyte support (Patch from Tim Waugh)
+
+2003-06-05  Stepan Kasal  <kasal@ucw.cz>
+        * tests/formatbre.awk, tests/formatere.awk: probably unused, so
+          I've removed them.
+
+2003-06-05  Stepan Kasal  <kasal@ucw.cz>
+        * intl/Makefile: remove generated file.
+
+2003-06-04  Stepan Kasal  <kasal@ucw.cz>
+        * src/dfa.c: typos fixed.
+
+2003-05-30  Bernhard Rosenkraenzer <bero@arklinux.org>
+        * src/dfa.c: Speed up multibyte support (Patch from Tim Waugh)
+
+2003-01-18  Bernhard Rosenkraenzer <bero@arklinux.org>
+        * src/grep.c: Fix -i -o combination (Patch from Tim Waugh)
+
+2002-03-26  Bernhard Rosenkraenzer <bero@arklinux.org>
+
+        * 2.5.1 Release.
+
+2002-03-26  Bernhard Rosenkraenzer <bero@arklinux.org>
+        * src/grep.c: Don't fail if we don't have an stdout fd and -q
+          is used (happens e.g. on calls from hotplug scripts)
+        * src/grep.c: Don't hang forever if fed with an empty string to
+          grep for and --color enabled
+        * src/grep.c: Fix infinite loop on
+          echo "1 one" | grep -E "[0-9]*" -o
+          echo "1 one" | grep -E "[0-9]*" --color
+        * po/*: Sync with translation project
+        * src/grep.c, src/Makefile.am, configure.in: Add patch from
+          Paul Eggert <eggert@twinsun.com> to comply with ridiculous
+          guidelines (don't act differently if invoked as egrep or fgrep)
+        * configure.in: Bump version number, require a recent autoconf
+
+2002-03-14  Bernhard Rosenkraenzer <bero@arklinux.org>
+        * src/Makefile.am, po/Makefile.in.in: Support DESTDIR properly
+        * tests/bre.tests: Add fix from
+          Peter Breitenlohner <peb@mppmu.mpg.de>
+
+2002-03-13  Bernhard Rosenkraenzer <bero@arklinux.org>
+        * configure.in, m4/regex.m4, m4/malloc.m4, m4/realloc.m4:
+          Don't set LIBOBJS directly, autoconf 2.53 doesn't like it
+        * intl/*: Sync with gettext 0.11
+        * po/*: Sync with translation project
+        * configure.in, src/Makefile.am: Don't duplicate code - make
+          egrep and fgrep links to grep and set matcher based on
+          application name, suggestion from
+          Guillaume Cottenceau <gc@mandrakesoft.com>
+        * src/grep.c: (prline) Add fix for -i --color from
+          Jim Meyering <meyering@lucent.com>
+        * configure.in: Version 2.5; release
+
+2002-01-23  Bernhard Rosenkraenzer <bero@arklinux.org>
+        * configure.in: Version 2.5g
+        * Makefile.cvs, grep.spec: Add packaging tools
+        Merge djgpp changes from Andrew Cottrell <anddjgpp@ihug.coml.au>:
+        * src/grep.c: Added conditional compilation for DJGPP
+        * djgpp: remove directory as it is no longer required with DJGPP 2.03
+                 (or 2.04 when released)
+        * README.DOS: Moved djgpp/readme to readme.dos
+        * PATCHES.AC, PATCHES.AM: delete files - redundant
+        * configure.in, Makefile.am: remove djgpp directory from list
+
+2002-01-22  Bernhard Rosenkraenzer <bero@arklinux.org>
+        * doc/grep.texi, doc/grep.1, NEWS: Document --label
+        * po/ru.po: Sync with translation project
+        * po/grep.pot: Sync with source
+
+2002-01-18  Bernhard Rosenkraenzer <bero@arklinux.org>
+        * src/grep.c: Add --label, based on patch from Stepan Koltsov
+
+2001-11-20  Bernhard Rosenkraenzer <bero@arklinux.org>
+        * autogen.sh: Don't hardcode aclocal dir
+
+2001-11-19  Bernhard Rosenkraenzer <bero@arklinux.org>
+        * src/grep.c: Add --only-matching (-o) switch (see NEWS)
+        * doc/grep.texi, doc/grep.1, NEWS: Document changes
+        * configure.in, lib/Makefile.am: Don't use internal getopt if
+          we're on a system that provides a working getopt function
+
+2001-09-25  Bernhard Rosenkraenzer <bero@arklinux.org>
+        * configure.in: Detect pcre correctly even when it's in
+          non-standard locations, using pcre-config
+        * src/grep.c: Add --color={always,never,tty} argument (like in ls)
+        * src/grep.c: Turn off blinking in the default colorization
+        * src/grep.c: Add --devices (-D) switch (analogous to --directories)
+        * src/dfa.c: Fix an i18n bug: echo "A" | grep '[A-Z0-9]' wouldn't work
+          in non-C-Locales on systems using current versions of glibc.
+        * AUTHORS: Change maintainer, credit Alain for his work until now
+        * configure.in, m4/decl.m4, m4/dosfile.m4, m4/gettext.m4,
+          m4/init.m4, m4/install.m4, m4/largefile.m4, m4/lcmessage.m4,
+          m4/header.m4, m4/isc-posix.m4, m4/missing.m4, m4/progtest.m4,
+          m4/sanity.m4:
+          Fix build with autoconf 2.5x, retain 2.1x compatibility for now
+        * autogen.sh: Add some crude hacks to make it possible to build with
+          both autoconf 2.5x and 2.1x
+        * acconfig.h: removed (no longer required)
+        * Makefile.am: add cvs-clean target
+        * doc/grep.texi, doc/grep.1, NEWS: Document changes
+          (--color, --devices, -D)
+        * src/dfa.c, src/grep.c: Add vim modelines
+
+2001-08-30  Alain Magloire
+
+        * configure.in: Add gl in ALL_LINGUAS.
+
+2001-08-30  Kurt D Schwehr
+
+        * doc/grep.1: Warn that grep insert a "--" between groups of matches,
+        when using the context options.
+        * doc/grep.texi: Likewised.
+
+2001-08-25  Heikki Korpela
+
+        * doc/grep.texi: Point out that some Platforms do not support
+        reading of directories and silently ignore them.
+
+2001-08-21  Alain Magloire
+
+        * lib/malloc.c: New file:
+        * lib/realloc.c: New file:
+        * lib/Makefile.am: Add malloc.c and realloc.c in EXTRA_DIST.
+
+2001-07-31  Alain Magloire
+
+        * po/*.po: New files from the translation team:
+        grep-2.5e.de.po  grep-2.5e.el.po  grep-2.5e.eo.po grep-2.5e.es.po
+        grep-2.5e.et.po  grep-2.5e.fr.po  grep-2.5e.gl.po grep-2.5e.it.po
+        grep-2.5e.pl.po  grep-2.5e.sl.po
+
+2001-07-31  Andreas Schwab
+
+        * src/grep.c: Fix all uses of error to pass a proper format
+        string.
+
+2001-07-29  Alain Magloire
+
+        * grep/src/grep.c (usage): Typos corrected.
+        Patches from Santiago Vila.
+
+2001-07-29  Alain Magloire
+
+        David Clissold, wrote:
+        a small bug in the GNU grep 2.4.2, which may have gone unnoticed
+        because it only causes a failure if building on a system with large
+        files enabled (e.g. an "off_t" is a "long long" rather than a "long").
+        savedir() takes on off_t argument, but in grepdir() the parameter
+        is cast to an (unsigned).  Well, if an off_t is larger than an int,
+        the value gets truncated.  This would not normally have an effect on a
+        little-endian platform (unless the file is >2GB), but on a big-endian
+        system it will always fail.  The external effect is that
+        "grep -r foo dir_name" fails with ENOMEM (from malloc() within
+        savedir()).
+
+        * grep/src/grep.c (grepdir): Remove the (unsigned) cast when calling
+        savedir().
+        Patch from David Clissold.
+
+2001-07-29  Alain Magloire
+
+        * grep/doc/grep.texi: In Bugs report use {n,m} for consistency.
+        * grep/doc/grep.1: Likewised.
+        Noted by Steven Lucy.
+
+2001-04-27  Isamu Hasegawa
+
+        * dfa.c (mblen_buf) : New variable contains the amount of remain
+        byte of corresponding multibyte character in the input string.
+        (SKIP_REMAIN_MB_IF_INITIAL_STATE) : Use mblen_buf.
+        (match_anychar) : Use mblen_buf.
+        (match_mb_charset) : Use mblen_buf.
+        (transit_state_consume_1char) : Use mblen_buf.
+        (transit_state) : Use inputwcs to get current (multibyte) character.
+        (dfaexec) : Add initialization of mblen_buf.
+
+2001-04-27  Isamu Hasegawa
+
+        * dfa.c (addtok) : Set appropriate value to multibyte_prop.
+        (dfastate) : Add the initialization of the variable.
+        (dfaexec) : Call transit_state if d->fail may transit by
+        multibyte characters.
+        (transit_state_singlebyte) : Clean up unnecessary code.
+        (transit_state_consume_1char) : Likewise.
+        (transit_state) : Add checking for word and newline.
+
+2001-04-19  Isamu Hasegawa
+
+        * search.c (check_multibyte_string) : Check the case when mbclen == 0.
+
+2001-04-11  Isamu Hasegawa
+
+        * search.c (check_multibyte_string) : Check the head of multibyte
+        characters, and optimize a bit.
+        (EGexecute) : Optimize a bit.
+        (Fexecute) : Fix the index.
+
+2001-04-02  Alain Magloire
+
+        * lib/regex.c: Update from GNU lib C, with the changes
+        provided by Paul Eggert.
+        * lib/posix/regex.h: Likewise.
+
+2001-02-17  Paul Eggert
+
+        Stop trying to support hosts that have nonstandard declarations for
+        mbrtowc and/or mbstate_t.  It's not worth the portability hassle.
+
+        * lib/quotearg.c (mbrtowc, mbsinit): Remove workaround macros
+        for hosts that have mbrtowc but not mbstate_t, as we now
+        insist on proper declarations for both before using mbrtowc.
+
+2001-03-18  Alain Magloire
+
+        * configure.in: Call AC_MBSTATE_T.
+        * Makefile.am: Add mbstate_t.m4
+        * m4/Makefile.am: Add mbstate_t.m4
+        * m4/mbstate_t.m4: New m4 macro.
+        * lib/strtol.c: Define CHAR_BITS.
+        Uwe H. Steinfeld, Ruslan Ermilov, Volkert Bochert, noted
+        that mbstate_t was not define for certain platforms.
+
+2001-03-18  Paul Eggert
+
+        * src/grep.c (fillbuf): Fix storage allocation performance
+        bug: buffer was doubling in size in many cases where it didn't
+        have to.
+
+2001-03-17  Paul Eggert
+
+        * src/grep.c (fillbuf): Avoid unnecessary division by 2.
+        Don't check xrealloc return value; it's guaranteed to be nonzero.
+        (fillbuf, grepdir): Use xalloc_die rather than error; it's shorter.
+
+2001-03-17  Alain Magloire
+
+        * src/grep.c (context_length_arg): error () passing wrong format.
+        Spotted by Jim Meyering.
+
+2001-03-07  Alain Magloire
+
+        * README-alpha: Removed reference to GNU tar, add the location
+        of the CVSROOT.
+
+2001-03-06  Alain Magloire
+
+        Only the Regex patterns should be split in an array, patterns[].
+        The dfa and KWset compiled patterns should remain global and the
+        patterns compiled all at once.
+
+        * src/search.c: include "error.h" and "xalloc.h" to get prototyping
+        of x*alloc() and error().
+        (kwsinit): Reverse to previous behaviour and takes no argument.
+        (kwsmusts): Likewised.
+        (Gcompile): For the regex pattern, split them and each pattern
+        is put in different compiled structure patterns[]. The patterns
+        are given to dfacomp() and kwsmusts() as is.
+        (Ecompile): Likewised.
+        (Fcompile): Reverse to the old behaviour of compiling the enire
+        patterns in one shot.
+        (EGexecute): If falling to GNU regex for the matching, loop in the
+        array of compile patterns[] to find a match.
+        (error): Many error () were call with arguments in the wrong order.
+        * tests/file.sh: Simple test to check for pattern in files.
+
+        Reaction to bug report fired by Greg Louis <glouis@dynamicro.on.ca>
+
+2001-03-06  Isamu Hasegawa
+
+        In multibyte environments, handle multibyte characters as single
+        characters in bracket expressions.
+
+        * src/dfa.h (mb_char_classes) : new structure.
+        (mbcsets): new variable.
+        (nmbcsets): new variable.
+        (mbcsets_alloc) : new variable.
+        * src/dfa.c (prtok) : handle MBCSET.
+        (fetch_wc): new function to fetch a wide character.
+        (parse_bracket_exp_mb) : new function to handle multibyte character
+        in lex().
+        (lex): invoke parse_bracket_exp_mb() for multibyte bracket expression.
+        (atom): handle MBCSET.
+        (epsclosure): likewise.
+        (dfaanalyze): likewise.
+        (dfastate): likewise.
+        (match_mb_charset): new function to judge whether a bracket match
+        with a multibyte character.
+        (check_matching_with_multibyte_ops) : handle MBCSET.
+        (dfainit): initialize new variables.
+        (dfafree): free new variables.
+
+2001-03-04  Alain Magloire
+
+        To get more in sync with other GNU utilities like GNU tar and fetish
+        all the supporting functions are now under lib.
+        Thanks to Jim Meyering, Volkert Bochert and Paul Eggert for
+        the code and the reminders.
+
+        * src/grep.c (fatal): Function removed, using error () from
+        lib/error.c instead.
+        (usage): Copyright updated.
+        (error): Function removed, using error () from lib/error.c instead,
+        adjust prototypes.
+        (prog): Global variable rename to program_name, to work with new
+        lib/error.c.
+        (xrealloc): Removed using lib/xmalloc.c.
+        (xmalloc): Removed using lib/xmalloc.c
+        (main): Register with atexit() to check for error on stdout.
+        * configure.in: Check for atexit(), call jm_MALLOC, jm_RELLOC and
+        jm_PREREQ_ERROR.
+        * tests/bre.awk: Removed the hack to drain the buffer since we
+        always fclose(stdout) atexit.
+        * tests/ere.awk: Likewise.
+        * tests/spencer1.awk: Likewise.
+        * bootstrap/Makefile.try: Update the Makefile to reflect the changes
+        in the new hierarchy.
+
+        * README-alpha: New File.
+        * m4/realloc.m4: New File.
+        * m4/malloc.m4: New File.
+        * m4/error.m4: New File.
+        * m4/Makefile.am: Updated.
+        * lib: New directory.
+        * lib/Makefile.am: New file.
+        * lib/closeout.c: New file.
+        * lib/closeout.h: New file.
+        * lib/fnmatch.c: New file.
+        * lib/fnmatch.h: New file.
+        * lib/atexit.c: New file.
+        * lib/error.c: New file.
+        * lib/error.h: New file.
+        * lib/quotearg.h: New file.
+        * lib/quotearg.c: New file.
+        * lib/xmalloc.c: New file.
+        * lib/posix: New directory.
+        * lib/posix/Makefile.am: New file.
+        * src/getopt.c: Moved to lib.
+        * src/getopt1.c: Moved to lib.
+        * src/getopt.h: Moved to lib.
+        * src/alloca.c: Moved to lib.
+        * src/exclude.c: Moved to lib.
+        * src/exclude.h: Moved to lib.
+        * src/hard-locale.h: Moved to lib.
+        * src/hard-locale.c: Moved to lib.
+        * src/isdir.c: Moved to lib.
+        * src/mechr.c: Moved to lib.
+        * src/obstack.c: Moved to lib.
+        * src/obstack.h: Moved to lib.
+        * src/regex.c: Moved to lib.
+        * src/regex.h: Moved to lib.
+        * src/posix: Moved to lib.
+        * src/posix/regex.h: Moved to lib.
+        * src/savedir.h: Moved to lib.
+        * src/savedir.c: Moved to lib.
+        * src/stpcpy.c: Moved to lib.
+        * src/strtoul.c: Moved to lib.
+        * src/strtol.c: Moved to lib.
+        * src/strtoull.c: Moved to lib.
+        * src/strtoumax.c: Moved to lib.
+        * src/xstrtol.c: Moved to lib.
+        * src/xstrtol.h: Moved to lib.
+        * src/xstrtoumax.c: Moved to lib.
+
+2001-03-01  Isamu Hasegawa
+
+        Implement the mechanism to match with multibyte characters,
+        and use it for 'period' in multibyte environments.
+
+        * dfa.h (mbps): new variable.
+        * dfa.c (prtok): handle ANYCHAR.
+        (lex): use ANYCHAR for 'period' in multibyte environments.
+        (atom): handle ANYCHAR.
+        (state_index): initialize mbps in multibyte environments.
+        (epsclosure): handle ANYCHAR.
+        (dfaanalyze): handle ANYCHAR.
+        (dfastate): handle ANYCHAR.
+        (realloc_trans_if_necessary): new function.
+        (transit_state_singlebyte): new function.
+        (match_anychar): new function.
+        (check_matching_with_multibyte_ops): new function.
+        (transit_state_consume_1char): new function.
+        (transit_state): new function.
+        (dfaexec): invoke transit_state if expression can match with
+        a multibyte character in multibyte environments.
+        (dfamust): handle ANYCHAR.
+
+2001-03-01  Alain Magloire
+
+        * src/exclude.c: New file.
+        * src/exclude.h: New file.
+        * src/grep.c (main): Took the GNU tar code to handle
+        the option --include, --exclude, --exclude-from.
+        Files are check for a match, with exlude_filename ().
+        New option --exclude-from.
+        * src/savedir.c: Call exclude_filename() to check for
+        file pattern exclusion or inclusion.
+        * configure.in: --disable-pcre rename to --disable-perl-regexp.
+
+
+2001-02-25  Alain Magloire
+
+        * src/dfa.c: Typo corrected.
+        Noted by Isamu Hasegawa.
+        * src/savedir.c: Typos corrected.
+
+2001-02-22  Alain Magloire
+
+        * src/savedir.c (isdir1): New function, calling isdir with
+        the correct pathname.
+
+2001-02-19  Isamu Hasegawa
+
+        Avoid incorrect state transition in multibyte environments.
+
+        * dfa.h (nmultibyte_prop): new variable.
+        (multibyte_prop): new variable.
+        * dfa.c (addtok): set inputwcs.
+        (dfastate): avoid incorrect state transition in multibyte
+        environments.
+        (dfaexec): likewise.
+        (dfainit): init multibyte_prop.
+        (dfafree): free multibyte_prop.
+        (inputwcs): new variable.
+
+2001-02-19  Isamu Hasegawa
+
+        Handle a multibyte character followed by '*', '+', and '{n,m}'
+        correctly.
+
+        * dfa.c (update_mb_len_index): new function.
+        Support for multibyte string.
+        (FETCH): call update_mb_len_index.
+        (lex): check cur_mb_index not to misunderstand multibyte characters.
+        (atom): make a tree from a multibyte character.
+        (dfaparse): initialize new variables.
+        (mbs): new variable.
+        (cur_mb_len): new variable.
+        (cur_mb_index): new variable.
+
+2001-02-18  Jim Meyering
+
+        * m4/dosfile.m4 (AC_DOSFILE): Move AC_DEFINEs out of AC_CACHE_CHECK.
+
+2001-02-17  Alain Malgoire
+
+        * doc/grep.texi: Document the new options and the new behaviour
+        back-references are local.  Use excerpt from Karl Berry regex
+        texinfo.
+
+        * bootstrap/Makefile.try: Added xstrtoumax.o xstrtoul.o hard-local.o
+
+2001-02-17  Alain Magloire
+
+        From Guglielmo 'bond' Bondioni :
+        The bug was that using a multi line file that contained REs (one per
+        line), backreferences in the REs were considered global (to the file)
+        and not local (to the line).
+        That is, \1 in line n refers to the first \(.\) in the whole file,
+        rather than in the line itself.
+
+        From Tapani Tarvainen :
+        # Re: grep -e '\(a\)\1' -e '\(b\)\1'
+        That's not the way it should work: multiple -e arguments
+        should be treated as independent patterns and back references
+        should not refer to previous ones.
+
+        From Paul Eggert :
+        GNU grep currently does not issue
+        diagnostics for the following two cases, both of which are erroneous:
+        grep -e '[' -e ']'
+        grep '[
+        ]'
+        POSIX requires a diagnostic in both cases because '[' is not a valid
+        regular expression.
+
+        To overcome those problems, grep no longer pass the concatenate
+        patterns to GNU regex but rather compile each patterns separately
+        and keep the result in an array.
+
+        * src/search.c (patterns): New global variable; a structure array
+        holding the compiled patterns.
+        Declare function prototypes to minimize error.
+        (dfa, kswset, regexbuf, regs): Removed, no longer static globals, but
+        rather fields in patterns[] structure per motif.
+        (Fcompile): Alloc an entry in patterns[] to hold the regex.
+        (Ecompile): Alloc an entry per motif in the patterns[] array.
+        (Gcompile): Likewise.
+        (EGexecute): Loop through of array of patterns[] for a match.
+
+2001-02-17  Alain Magloire
+
+        From Bernd Strieder :
+        # tail -f logfile | grep important | do_something_urgent
+        # tail -f logfile | grep important | do_something_taking_very_long
+        If grep does full buffering in these cases then the urgent operation
+        does not happen as it should in the first case, and in the second case
+        time is lost due to waiting for the buffer to be filled.
+        This is clearly spoken not grep's fault in the first place, but libc's.
+        There is a heuristic in libc that make a stream line-buffered only if a
+        terminal is on the other end. This doesn't take care of the cases where
+        this connection is somehow indirect.
+
+        * src/grep.c (line_buffered): new option variable.
+        (prline): if line_buffered is set fflush() is call.
+        (usage): line_buffered new option.
+        Input from Paul Eggert, doing setvbuf() may not be portable
+        and breaks grep -z.
+
+2001-02-16  Alain Magloire
+
+        Patch from Isamu Hasegawa, for multibyte support.
+        This patch prevent kwset_matcher from following problems.
+        For example, in SJIS encoding, one character has the codepoint 0x895c.
+        So the second byte of the character can match with '\' incorrectly.
+        And in eucJP encoding, there are the characters whose codepoints are
+        0xa5b9, 0xa5c8.  On the other hand, there is one character whose
+        codepoint is 0xb9a5.  So 0xb9a5 can match with 2nd byte of 0xa5b9
+        and 1st byte of 0xa5c8.
+
+        * configure.in: Add check for mbrtowc.
+        * src/search.c (check_multibyte_string): new function.
+        Support for multibyte string.
+        (EGexecute): call check_multibyte_string when kwset is set.
+        (Fexecute): call to check_multibyte_string.
+        (MBS_SUPPORT): new macro.
+        (MB_CUR_MAX): new macro.
+
+2001-02-16  Alain Magloire
+
+        * djgpp/config.bat: Fix for 4dos.com.
+        * m4/dosfile.m4 (HAVE_DOS_FILE_CONTENTS): Was not set.
+        Bugs noted and patched by Juan Manuel Guerrero.
+
+2001-02-16  Alain Magloire
+
+        A much requested feature, the possibility to select
+        files when doing recurse :
+        # find . -name "*.c" | xargs grep main {}
+        # grep --include=*.c main .
+        # find . -not -name "*.c" | xargs grep main {}
+        # grep --exclude=*.c main .
+
+        * src/grep.c (short_options): -R equivalent to -r.
+        (#ifdef) : Fix some inconsistencies in the use of #ifdefs, prefer
+        #if defined() wen possible.
+        (long_options): Add --color, --include and exclude.
+        (Usage): Description of new options.
+        (color): Rename color variable to color_option.
+        Removed 'always|never|auto' arguments, not necessary for grep.
+        (exclude_pattern): new variable, holder for the file pattern.
+        (include_pattern): new variable, hoder for the file pattern.
+        * src/savedir.c: Signature change, take two new argmuments.
+        * doc/grep.texi: Document, new options.
+        * doc/grep.man: Document, new options.
+
+2001-02-09  Alain Magloire
+
+        * src/grep.c (long_options): Added equivalent to -r with -R.
+        * src/grep.c (usage): added --color and --colour.
+        Noted with patch from, H.Merijn Brand and Wichert Akkerman.
+
+2001-02-09  Alain Magloire
+
+        Patch from Ulrich Drepper to provide hilighting.
+
+        * src/grep.c: New option --color.
+        (color): New static var.
+        (COLOR_OPTION): new constant.
+        (grep_color): new static var.
+        (prline): Now when color is set prline() will call the current matcher
+        to find the offset of the matching string.
+        * src/savedir.c: Take advantage of _DIRENT_HAVE_TYPE if supported.
+        * src/search.c (EGexecute, Fexecute, Pexecute): Take a new argument
+        when doing exact match for the color hiligting.
+
+2000-09-01  Brian Youmans
+
+        * doc/grep.texi: Typo fixes.
+
+2000-08-30  Paul Eggert
+
+        * doc/grep.texi (Usage): Talk about what "grep -r hello *.c"
+        means.
+
+2000-08-20  Paul Eggert
+
+        Handle range expressions correctly even when they match
+        strings with two or more characters.
+
+        * src/dfa.h (CRANGE): New enum value.  Comment fix.
+
+        * src/dfa.c: Include <locale.h> if HAVE_SETLOCALE.
+        Include "hard-locale.h".
+        (prtok): Print CRANGE.
+        (hard_LC_COLLATE): New static var.
+        (lex): Return CRANGE when parsing a character range in a hard locale.
+        Don't use strcoll; it's no longer needed and wasn't correct anyway.
+        Use unsigned rather than token to hold unsigned chars.
+        (addtok): Comment fix.
+        (atom): Treat a CRANGE as if it were (.\1), approximately.
+        (dfaparse): Initialize hard_LC_COLLATE.
+
+        * src/Makefile.am (base_sources): Add hard-locale.c, hard-locale.h.
+
+        * src/hard-locale.c, src/hard-locale.h: New files, taken from
+        textutils.
+
+2000-08-20  Paul Eggert
+
+        * tests/Makefile.am (TESTS_ENVIRONMENT): Add LC_ALL=C, since
+        some of the tests assume the C locale.
+
+2000-08-16  Paul Eggert
+
+        * src/search.c (Gcompile, Ecompile): -x overrides -w, for
+        consistency with fgrep.  Don't assume that sizes fit in 'int'.
+        Fix comments to match code.
+
+2000-06-06  Paul Eggert
+
+        * src/grep.c (grepdir): Don't look at st_dev when testing for
+        Mingw32 bug.
+
+2000-06-05  Paul Eggert
+
+        Port to Mingw32, based on suggestions from Christian Groessler
+        <cpg@aladdin.de>.
+
+        * src/isdir.c: New file, taken from fileutils.
+
+        * src/Makefile.am (base_sources): Add isdir.c.
+
+        * src/grep.c (grepfile): Use isdir instead of doing it inline.
+        (grepdir): Suppress ancestor check if the directory's inode and device
+        are both zero, as that occurs only on Mingw32 which doesn't support
+        inode or device.
+
+        * src/system.h (isdir): New decl.
+        (is_EISDIR): Depend on HAVE_DIR_EACCES_BUG, not D_OK.
+        Use isdir, not access.
+
+2000-06-02  Paul Eggert
+
+        Problen noted by Gerald Stoller <gerald_stoller@hotmail.com>
+
+        * src/grep.c (main): POSIX says that -q overrides -l, which
+        in turn overrides the other output options.  Fix grep to
+        behave that way.
+
+2000-05-27  Paul Eggert
+
+        Simplify and tune the buffer allocation strategy.  Do not reserve a
+        large save area: reserve only enough bytes to hold the residue, plus
+        page alignment.  Put a newline sentinel before the buffer, for speed
+        when searching backwards for newline.
+
+        * src/grep.c (ubuffer, bufsalloc, PREFERRED_SAVE_FACTOR, page_alloc):
+        Remove.  All uses changed.
+        (INITIAL_BUFSIZE): New macro.
+        (reset, fillbuf): Use simpler buffer allocation strategy.
+        (reset): Check for preposterously large pagesize that would cause
+        later calculations to overflow.
+        (fillbuf): Do not resize buffer if there's room at the end for
+        at least one more page.  This greatly increases performance when
+        reading from non-regular files that contain no newlines.
+        When growing the buffer, double its size instead of using a
+        more complicated algorithm.
+        (prtext, grep): Speed up by relying on the newline sentinel before the
+        start of the buffer.
+        (grep): When looking backwards for the last newline in a buffer,
+        stop when we hit the residue, since it can't contain a newline.
+        This avoids an O(N**2) algorithm when reading binary data from
+        a pipe.  Use a sentinel to speed up the backward search for newline.
+        (nlscan): Undo previous change; it wasn't needed and just complicates
+        and slows down the code a tad.
+
+2000-05-24  Paul Eggert
+
+        Handle very large input counts better. Bug noted by Jim Meyering.
+
+        * src/grep.c (totalcc, totalnl): Use uintmax_t, not off_t.
+        (add_count): New function.
+        (nlscan, prline, grep): Use it to check line and byte count overflows.
+        (nlscan, grep): Don't keep track of counts when not asked to; this
+        avoids unnecessary overflow diagnostics.
+        (print_offset_sep): Now takes args of type uintmax_t and char,
+        not off_t and int.
+
+2000-05-16  Paul Eggert
+
+        Problem reported by Bob Proulx <rwp@hprwp.fc.hp.com>, this patch
+        is base on his finding, with appropriate corrections.
+
+        * src/grep.c (main): Fix bug: -x and -w matched even when no
+        patterns were specified.
+        * tests/empty.sh: Test for -x and -w bug in grep 2.4.2.
+
+2000-04-24  Paul Eggert
+
+        POSIX conformance fixes: grep -q now exits with status zero
+        if an input line is selected, even if an error also occurs.
+        grep -s no longer affects exit status.
+
+        * src/grep.c (suppress_errors): Move definition earlier so
+        that suppressible_error can use it.
+        (suppressible_error): New function.
+        (exit_on_match): New var.
+        (grepbuf): If exit_on_match is nonzero, exit with status zero
+        immediately.
+        (grep, grepfile, grepdir): Invoke suppressible_error.
+        (main): -q sets exit_on_match.
+
+        * doc/grep.1, doc/grep.texi, NEWS:
+        Document -q's behavior as required by POSIX.
+
+        * tests/status.sh:
+        Test for -q and -s behavior as conforming to POSIX.
+
+2000-04-20  Paul Eggert
+
+        * tests/Makefile.am (TESTS_ENVIRONMENT):
+        Set GREP_OPTIONS to the empty string.
+
+2000-04-20  Paul Eggert
+
+        * tests/status.sh: Fix typo: test -b -> test -r.
+
+2000-04-20  Paul Eggert
+
+        * src/dfa.c (lex):
+        Do not assume that [c] is equivalent to [c-c]; this isn't true
+        if LC_COLLATE specifies that some characters are equivalent.
+        (setbit_case_fold): New function.
+        (lex): Use it to simplify the code a bit.
+
+2000-04-17  Paul Eggert
+
+        Do CRLF munging only if HAVE_DOS_FILE_CONTENTS, instead of
+        having it depend on O_BINARY (which leads to incorrect results
+        on BeOS, VMS, and MacOS).
+
+        * bootstrap/Makefile.try (DEFS): Add -DHAVE_DOS_FILE_CONTENTS.
+        * src/system.h (SET_BINARY): Define only if HAVE_DOS_FILE_CONTENTS.
+        (O_BINARY): Do not define.
+
+        * m4/dosfile.m4: Define HAVE_DOS_FILE_CONTENTS if it appears we're
+        using DOS.
+
+        * src/grep.c (undossify_input, fillbuf, dosbuf.c, prline, main):
+        Depend on HAVE_DOS_FILE_CONTENTS, not O_BINARY, when handling CRLF
+        matters.
+        (grepfile, main): Depend on SET_BINARY, not O_BINARY, when
+        handling binary files on hosts that care about text versus binary.
+
+2000-04-17  Paul Eggert
+
+        * lib/getpagesize.h (getpagesize): Define to B_PAGE_SIZE if
+        __BEOS__ is defined.  Based on a fix by Bruno Haible
+        <haible@clisp.cons.org>.
+
+2000-04-17  Bruno Haible
+
+        * src/system.h [BeOS]: Ignore O_BINARY.
+        * src/getpagesize.h [BeOS]: Define getpagesize() as B_PAGE_SIZE.
+
+2000-04-10  Paul Eggert
+
+        * doc/grep.1, doc/grep.texi, NEWS: -C now requires an operand.
+        * src/grep.c (short_options, long_options, main, usage): Likewise.
+        (context_length_arg): Renamed from ck_atoi.  Now reports an error
+        and exits if the number is out of range for a context length.
+        (get_nondigit_option): New function, which checks for overflow
+        correctly, and which does not parse nonadjacent strings of digits
+        into a single number.
+        (main): Use get_nondigit_option instead of doing the code inline.
+        With -A, -B, and -C, optarg is now guaranteed to be nonzero.
+
+2000-04-08  Paul Eggert
+
+        Now that we know that the input is always terminated by a
+        newline before the matching algorithms see it, clean up the
+        matching algorithms so that they no longer need to modify the
+        input by inserting a sentinel newline, and no longer worry
+        about running off the end of the buffer due to a missing sentinel.
+
+        * src/grep.c (nlscan, prpending, prtext, grepbuf): Do not
+        worry about running off the end of the input buffer, since
+        it's now guaranteed to end in the sentinel newline.
+        * src/search.c (EGexecute, Pexecute): Likewise.
+
+        * src/dfa.c (prtok, dfasyntax, dfaparse, copy, merge, state_index,
+        epsclosure, dfaexec, dfacomp):
+        Change many instances of "T *" to "T const *", to catch
+        any inadvertent programming errors made during this conversion.
+        * src/dfa.h (dfacomp, dfaexec, dfaparse): Likewise.
+        * src/grep.c (struct stats.parent, long_options, grepdir,
+        compile, execute, fillbuf, lastnl, lastout, nlscan, prline,
+        prpending, prtext, grepbuf, grep, grepfile, grepdir): Likewise.
+        * src/grep.h (struct matcher.compile, struct matcher.execute):
+        Likewise.
+        * src/kwset.c (struct kwset.trans, kwsalloc, kwsincr, treefails,
+        treedelta, hasevery, treenext, bmexec, cwexec, kwsexec): Likewise.
+        * src/kwset.h (kwsalloc, kwsincr, kwsexec): Likewise.
+        * src/search.c (kwsmusts, Gcompile, Ecompile, EGexecute, Pcompile,
+        Pexecute): Likewise.
+
+        * src/dfa.c (dfaexec):
+        Use size_t, not char *, to avoid worrisome casts to convert
+        char const * to char *.
+        * src/dfa.h (dfaexec): Likewise.
+        * src/grep.c (execute): Likewise.
+        * src/grep.h (execute): Likewise.
+        * src/kwset.c (bmexec, cwexec, kwsexec): Likewise.
+        * src/kwset.h (struct kwsmatch.offset, kwsalloc, kwsincr,
+        kwsexec): Likewise.
+        * src/search.c (EGexecute, Fexecute, Pexecute): Likewise.
+
+        * src/dfa.h (_PTR_T): Depend on defined __STDC__, not __STDC__.
+        (PARAMS): Depend on PROTOTYPES, not __STDC__.
+
+        * src/dfa.c (dfasyntax): Last arg is unsigned char, not int.
+        * src/dfa.h (dfasyntax): Likewise.
+
+        * src/dfa.h (struct dfa): Remove member newlines; no longer needed.
+        * src/dfa.c (build_state, dfaexec, dfafree): Do not worry
+        about special newline state.
+
+        * src/search.c (matchers): Move definition to end of file, so
+        that we don't need forward decls.
+        (lastexact): Remove.
+        (kwset_exact_matches): New var; subsumes old lastexact var.
+        All uses changed.
+
+        * src/dfa.c (index): Remove macro.
+        (REALLOC_IF_NECESSARY): Skip unnecessary test.
+        (tstbit, setbit, clrbit): Declare arg to be unsigned, to help compiler.
+        (copyset, zeroset, equal): Use C builtin primitives, to help compiler.
+        (dfaexec): Do not modify input string.
+        Remove newline parameter; no longer needed.
+        (comsubs): Use strchr, not index.
+
+        * src/grep.h (matchers): Use fixed name size, not pointer (as
+        there's no need for the extra flexibility).  All uses changed.
+
+        * src/kwset.h (struct kwsmatch.offset): Renamed from beg, with
+        change of type to size_t.  All uses changed.
+
+        * src/grep.c (reset): No longer need kludge for dfaexec.  Simplify.
+        (reset, grepbuf): Adjust to new interface for 'execute'.
+        (install_matcher): List is now terminated by null compile,
+        not null name.
+        Do not invoke setrlimit if that wouldn't change the limit.
+
+        * src/dfa.c (xcalloc, xmalloc, xrealloc, prtok, tstbit, setbit,
+        clrbit, copyset, zeroset, notset, equal, charclass_index,
+        looking_at, lex, addtok, atom, nsubtoks, copytoks, closure,
+        branch, regexp, copy, insert, merge, delete, state_index,
+        build_state, build_state_zero, icatalloc, icpyalloc, istrstr,
+        ifree, freelist, enlist, comsubs, addlists, inboth):
+        Remove forward decls; no longer needed.
+        * src/grep.c (ck_atoi, usage, error, setmatcher,
+        install_matcher, prepend_args, prepend_default_options,
+        page_alloc, reset, fillbuf, grepbuf, prtext, prpending, prline,
+        print_offset_sep, nlscan, grep, grepfile): Likewise.
+        * src/kwset.c (enqueue, treefails, treedelta, hasevery,
+        treenext, bmexec, cwexec): Likewise.
+        * src/search.c (Gcompile, Ecompile, EGexecute, Fcompile, Fexecute,
+        Pcompile, Pexecute, kwsinit): Likewise.
+
+        * src/search.c (Pcompile): Do not assume newly allocated
+        storage is zeroed.
+
+2000-04-06  Paul Eggert
+
+        * doc/grep.1, doc/grep.texi, NEWS: Improve the explanation of
+        locale-dependent behavior of range expressions.  Mention
+        LC_COLLATE, since this affects range expressions.
+
+2000-03-26  Paul Eggert
+
+        * Makefile.am (ACINCLUDE_INPUTS): Add decl.m4, inttypes_h.m4,
+        uintmax_t.m4, ulonglong.m4, xstrtoumax.m4.
+        * m4/Makefile.am (EXTRA_DIST): Likewise.
+
+        * src/Makefile.am (base_sources):
+        Add xstrtol.c, xstrtol.h, xstrtoumax.c.
+        (EXTRA_DIST): Add strtol.c.
+
+        * configure.in (jm_AC_TYPE_UINTMAX_T, jm_AC_PREREQ_XSTRTOUMAX,
+        HAVE_DECL_STRTOUL, HAVE_DECL_STRTOULL): Add.
+        (AC_REPLACE_FUNCS): Add strtoul.
+
+        * src/grep.c: Include xstrtol.h.
+        (ck_atio): Use xstrtoumax and do proper overflow checking.
+        (max_count, outleft): Now off_t, not int.
+        (main): Likewise. Use xstrtoumax to convert max_count from string.
+
+        * acconfig.h (HAVE_DECL_STRTOUL, HAVE_DECL_STRTOULL): New #undefs.
+        (HAVE_STPCPY, ENABLE_NLS, HAVE_CATGETS, HAVE_GETTEXT,
+        HAVE_LC_MESSAGES): Remove.
+
+        * m4/decl.m4, m4/inttypes_h.m4, m4/uintmax_t.m4, m4/ulonglong.m4,
+        m4/xstrtoumax.m4, src/strtol.c, src/strtoul.c, src/strtoull.c,
+        src/strtoumax.c, src/xstrtol.c, src/xstrtol.h, src/xstrtoumax.c:
+        New files, taken unchanged from textutils, fileutils, sh-utils
+        and/or tar.
+
+2000-03-23  Paul Eggert
+
+        * src/search.c (Pcompile): Add support for NUL bytes in
+        Perl regular expressions.
+
+2000-03-23  Paul Eggert
+
+        * NEWS, doc/grep.1, doc/grep.texi: Change --pcre to --perl-regexp.
+        * src/grep.c (long_options, usage): Likewise.
+
+        * doc/grep.1, doc/grep.texi: Remove pgrep program.
+        * src/Makefile.am (bin_PROGRAMS): Likewise.
+        (pgrep_SOURCES): Remove.
+
+        * src/grep.c (main): Rename matcher from "pgrep" to "perl".
+        * src/search.c (matchers): Likewise.
+
+        * src/search.c: Do not include stdio.h; no longer needed.
+        (NILP): Remove.
+        (sub): No longer static.
+        (n_pcre): Remove.
+        (cre): No longer an array.  Present only if HAVE_LIBPCRE.
+        (extra): New variable.
+        (Pcompile): Use fatal to report errors.
+        This also removes a possible core dump.
+        Add checks (marked FIXME) for restrictions in pcre.
+        Use pcre_maketables for proper localized behavior.
+        (Pcompile, Pexecute): Use GNU coding style.
+        The argument is a single pattern, not a list of patterns separated
+        by newlines; this is for consistency with grep and egrep.
+        Use pcre_study for speed.
+        (Pexecute): Abort if we lack pcre.
+        Abort if pcre_exec reports an impossible error.
+        Use code similar to the rest of search.c
+        to narrow down to the line we've found.
+
+2000-03-21  Alain Magloire
+
+        * configure.in: added AC_CHECK_LIB(pcre, pcre_exec)
+        * ChangeLog: Typos corrected.
+        * src/search.c: new MACRO HAVE_LIBPCRE
+
+2000-03-21  H.Merijn Brand
+
+        * src/Makefile.am(bin_PROGRAMS): added pgrep and new macro
+        pgrep_SOURCES.
+        * src/search.c: new functions Pcompile() and Pexecute()
+        to support PCRE.  Update matcher[] array for pgrep.
+        * src/grep.c: new short and long option --pcre and -P.
+        usage() updated.
+
+2000-03-21  Bastiaan Stougie
+
+        Improvement of the -m or --max-count option. Now works for NUM > 1 and
+        prints trailing context for the last matching line.
+
+        * src/grep.c
+        (after_last_match): Is a new off_t variable that replaces inputhwm
+        to retain the correct input offset even after a call to fillbuf. Note
+        that after_last_match has a different meaning than inputhwm:
+        it always points to the offset in the input of the first byte after
+        the last matching line, and is 0 if no matching line has been found
+        yet.
+        (grep): Print trailing context after the NUMth match when the -m NUM
+        option is used.
+        (grep): Added comment. Should have been commented already.
+        (grepbuf): Now updates outleft correctly. This fixes the bug that the
+        -m NUM option did not stop after NUM lines for NUM greater than 1.
+        (grepbuf, prtext): Now update after_last_match instead of inputhwm.
+        (fillbuf): No longer updates inputhwm.
+        (prpending): When outputting trailing context of the max_count-th
+        matching line, stop at the first matching line.
+        (grepfile): Seek to after_last_match or eof, depending on the values
+        of outleft and bufmapped.
+        (usage): added the -m or --max-count option to the help message.
+        * doc/grep.texi, doc/grep.1: Document the change of the -m option.
+
+2000-03-17  Paul Eggert
+
+        Add new -m or --max-count option, based on a suggestion by
+        Bastiaan Stougie.
+
+        * doc/grep.texi, doc/grep.1: Document it.
+        * src/grep.c (short_options, long_options, main): Add it.
+        (inputhwm): New variable.
+        (fillbuf, prtext, grepbuf): Set it.
+        (bufmapped): Now a macro (defined to zero) if HAVE_MMAP is not defined.
+        (max_count, outleft): New variables.
+        (prtext, grepbuf, grep): Don't output more than outleft lines.
+        (grepfile): If grepping standard input, seek to the limit of what
+        we've read before exiting.  This fixes a bug with mmapped input,
+        and is needed for proper -m support.
+        (main): Exit immediately if -m 0 is specified.
+
+2000-03-08  Alain Magloire
+
+        * configure.in: version 2.4.2
+
+2000-03-07  Paul Eggert
+
+        * Make intl subdirectory match fileutils, tar, etc.;
+        see intl/ChangeLog for details.
+
+        * src/getpagesize.h: Reformat to match latest fileutils.
+
+        * src/savedir.c (savedir): Work even if directory size is
+        negative; this can happen with some NFS screwups.
+
+2000-03-03  Jim Meyering
+
+        * regex.m4: Make sure re_compile_pattern accepts patterns like '{1'.
+
+2000-03-02  Alain Magloire
+
+        * 2.4.1 Release
+
+2000-02-25  Paul Eggert
+
+        * configure.in (LIBOBJS): Work around automake 1.4 bug:
+        regex.c wasn't being passed through ansi2knr on pre-ANSI hosts.
+        (ac_use_included_regex): Fix typo in warning.
+        * src/Makefile.am (EXTRA_DIST): Remove regex.c, as the LIBOBJS
+        workaround means that automake now puts regex.c into DIST_COMMON.
+
+2000-02-25  Alain Magloire
+
+        * po/*.po: update of the PO files.
+
+2000-02-22  Eli Zaretskii
+
+        * doc/grep.1:  Two small glitches(typos).
+
+2000-02-18  Eli Zaretskii
+
+        * djgpp/config.site (prefix, INSTALL): Use /dev/env/DJDIR instead
+        of ${DJDIR}, so that the produced Makefile's work on any DJGPP
+        installation.
+
+2000-01-30 Alain Magloire
+
+        * doc/grep.1:  corrected typo.
+        Noted by Ruslan Ermilov.
+
+2000-01-30 Alain Magloire
+
+        * vms/Makefile.am: added config_vms.h to EXTRA_DIST.
+        * vms/config_vms.h: New File, contains macros specific to VMS and
+        avoid namespace collision with operating system supplied C library.
+        * vms/make.com: Better compiler auto-detection; information for builds
+        on pre-OpenVMS 7.x systems; general overhaul.
+        * src/getpagesize.h: Reinstate support for different pagesizes on
+        VAX and Alpha. Work around problem with DEC C compiler.
+        * src/vms_fab.c: Cast to some assigments; fixed typo argcp vs. argp.
+        * src/vms_fab.h: Added new include files to avoid warnings about
+        undefined function prototypes.
+        Those patches were provided by Martin P.J. Zinser (zinser@decus.de).
+
+2000-01-30  Paul Eggert
+
+        * src/grep.c (main): Update copyright notice.
+
+2000-01-28  Alain Magloire
+
+        * src/grep.c (usage):  The example "%s -i 'hello.*world' could
+        lead to confusion when progname is 'fgrep.
+        Noted by Akim Demaille.
+
+        * configure.in: Reenable, jm_INCLUDE_REGEX() since we now
+        track GNU lib C.
+        * src/Makefile.am: EXTRA_DIST new macros with regex.c regex.h.
+        Requested By Ulrich Drepper.
+
+2000-01-25  Paul Eggert
+
+        * src/grep.c (grep): If the final byte of an input file is not
+        a newline, grep now silently supplies one.
+        * doc/grep.texi, NEWS: Likewise.
+
+2000-01-25  Paul Eggert
+
+        * NEWS, doc/grep.1, doc/grep.texi: Add -I option.
+        * src/grep.c (short_options, usage, main): Likewise.
+
+        * doc/grep.texi: Fix some incorrect references to ASCII.
+
+2000-01-25  Paul Eggert
+
+        * doc/grep.1: Simplify synopsis; sort options; mention
+        environment variables; clean up some minor gaffes.
+
+2000-01-25  Paul Eggert
+
+        * doc/grep.texi:
+        Fix some errors in description of [:print:] and the like.
+
+2000-01-23  Paul Eggert
+
+        * src/dfa.c (FETCH, lex): Put brackets around if-body to avoid
+        GCC warning about ambiguous if-then-else.
+
+2000-01-23  Paul Eggert
+
+        * src/regex.c (GET_UNSIGNED_NUMBER): Allow only ASCII digits.
+        * src/dfa.c (ISASCIIDIGIT): New macro.
+        (lex): Use it instead of ISDIGIT.
+
+2000-01-23  Paul Eggert
+
+        The bug is that regular expression ranges like [a-z] compare raw
+        byte codes to the range boundaries, whereas POSIX says that they
+        should use the current collating sequence instead.  For example,
+        in Solaris 7 with LC_ALL=en_US, the command
+        echo x | grep '[ -~]'
+        outputs 'x', but it shouldn't output anything since ' ' and '~'
+        sort before all letters in that locale.
+
+        * src/regex.c (compile_range): When matching a character
+        range, use the current collating sequence, as POSIX requires.
+        * src/dfa.c (lex): Likewise.
+
+2000-01-20  Alain Magloire
+
+        * tests/Makefile.am (dist-hook): Added new rule to make sure
+        that the shell scripts have the right permissions.
+        * src/posix/Makefile.am (EXTRA_DIST): added regex.h in the
+        distribution.
+        * THANKS: updated.
+
+2000-01-18  Alain Magloire
+
+        * Rectification the initial patch to add --binary-file option
+        was done by Ruslan Ermilov.
+
+2000-01-17  Paul Eggert
+
+        Sync with sources of fileutils 4.0n, tar 1.13.17, glibc 2.1.3a1.
+        Convert to ANSI C prototypes (using ansi2knr for backwards
+        compatibility), as this makes it easier to sync.
+
+        * configure.in (AC_OBJEXT): Spell in a funny way, to work around
+        a bug in automake 1.4 with ansi2knr.
+        (LIBOBJS): Add assignment so that .o files in LIBOBJS are also built
+        via the ANSI2KNR-filtering rules.
+        (AC_OUTPUT): Add src/posix/Makefile.
+        * src/Makefile.am (AUTOMAKE_OPTIONS): Add ansi2knr.
+        (SUBDIRS): New macro.
+        * src/ansi2knr.1, src/ansi2knr.c, src/posix/Makefile.am: New files.
+        * src/dfa.c, src/dosbuf.c, src/grep.c, src/kwset.c, src/search.c,
+        src/vms_fab.c:
+        Use prototypes for function definitions.
+        * src/grep.c (main): Use int counter for default context,
+        fixing an ANSI portability bug uncovered by the above changes.
+
+        * config.guess, config.sub, install-sh, missing, src/alloca.c,
+        src/getpagesize.h, src/memchr.c, src/savedir.c, src/savedir.h,
+        src/stpcpy.c:
+        Upgrade to latest version from fileutils 4.0n.
+
+        * src/getopt.c, src/getopt.h, src/getopt1.c: Upgrade to latest
+        version from tar 1.13.17.
+
+        * src/obstack.c, src/obstack.h, src/regex.c, src/regex.h:
+        Upgrade to glibc 2.1.3 alpha 1, with K&R C portability fix.
+        * src/posix/regex.h: New file, from glibc 2.1.3 alpha 1.
+
+2000-01-04  Paul Eggert
+
+        Initial patch by Ruslan Ermilov.
+
+        Add --binary-files option.
+        * NEWS, doc/grep.1, doc/grep.texi: Document it.
+        * src/grep.c (BINARY_FILES_OPTION): New constant.
+        (long_options, grep, usage, main): New --binary-files option.
+        (binary_files): New var.
+        * src/system.h (TYPE_SIGNED, TYPE_MINIMUM, TYPE_MAXIMUM, CHAR_MAX):
+        New macros.
+        (INT_MAX, UCHAR_MAX): Define in terms of TYPE_MAXIMUM.
+
+2000-01-04  Paul Eggert
+
+        * savedir.c (savedir): Don't store past the end of an array if
+        name_size is zero and the directory is empty.
+        Reported by Dima Barsky <dima@pwd.hp.com>.
+
+1999-12-03  Alain Magloire
+
+        * 2.4 Release.
+
+1999-11-18  Paul Eggert
+
+        * m4/largefile.m4 (AC_SYS_LARGEFILE_FLAGS): Work around a
+        problem with the QNX 4.25 shell, which doesn't propagate exit
+        status of failed commands inside shell assignments.
+
+1999-11-13  Eli Zaretskii
+
+        * doc/grep.texi: Minor markup and spelling corrections.  Use
+        @noindent where appropriate.
+
+        * PATCHES-{AM,AC}: rename to PATCHES.{AM,AC}
+
+1999-11-12  Eli Zaretskii
+
+        doc/grep.texi: Minor fixes and typos corrected.
+        djgpp/README: Updated version.
+
+1999-11-07  Paul Eggert
+
+        * src/grep.c (usage): Fix misspelling.
+
+1999-11-07  Paul Eggert
+
+        Don't assume that the C library has re_set_syntax and friends.
+        * src/Makefile.am (base_sources): Add regex.c, regex.h.
+        (EXTRA_DIST): Remove regex.c, regex.h.
+
+        * src/grep.c (prtext): Use out_quiet, not not_text, to decide
+        whether to set pending to zero at the end.
+        (not_text): Remove static variable, undoing latest change.
+        (grep): Likewise.
+
+        * doc/grep.texi: Tighten up the text, and fix some minor
+        spelling and usage errors.  Use @enumerate rather than @table
+        @samp, since it's better for Q&A format.  Add cross
+        references.
+
+1999-11-01 Alain Magloire
+
+        * src/search.c: Use the more portable [[:alnum:]]
+        to define a word instead of Ascii dependent [0-9A-Za-z]
+        * src/grep.c: make not_text global to not display text when
+        the context switches -A/-B/-C are use on binary files.
+        * make grep-2.3g available for testing.
+        * configure.in: drop support for --without-included-regex.
+        This was generating bogus bug reports, since many GNU/Linux
+        users have different version of glibc.  And glibc maintainers
+        decided to drop k&r support.
+
+1999-11-01 Arnold D. Robbins
+
+        * regex.c (init_syntax_once): move below definition of
+        ISALNUM etc., then use ISALNUM to init the table, so that
+        the word ops will work if i18n'ed.
+        (SYNTAX): And subscript with 0xFF for Latin-1 characters.
+
+1999-10-26  Alain Magloire
+
+        * src/regex.c: Merge changes from GNU lib C.
+        * Updated the *.po files
+
+1999-10-26  Paul Eggert
+
+        * src/grep.c (fillbuf): Don't report buffer size overflow if
+        newalloc == save and maxalloc == save.  This can happen
+        e.g. when reading a large page-aligned file that contains
+        no newlines.
+
+1999-10-21  Paul Eggert
+
+        * src/grep.c (usage): Give example.  Clarify -F.
+        Explain exit status more clearly.
+
+1999-10-12  Paul Eggert
+
+        * doc/grep.texi: Shorten the commentary about egrep and {.
+        "BSD grep" -> "traditional grep".
+        * doc/grep.1: Match recent changes to grep.texi.
+
+1999-10-11  Paul Eggert
+
+        * NEWS, doc/grep.1, doc/grep.texi: New option --mmap.
+        * src/grep.c (mmap_option): New variable.
+        (long_options, reset, usage): Add --mmap.
+        Default is now read, not mmap.
+
+        * doc/grep.1: Document -Z or --null.
+
+1999-10-11  Paul Eggert
+
+        * doc/grep.texi: Fix texinfo glitches.  POSIX -> POSIX where
+        appropriate.
+
+1999-10-11  Paul Eggert
+
+        * acconfig.h (ssize_t): New #undef.
+
+        * configure.in (AC_CHECK_TYPE): Add ssize_t.
+
+        * src/grep.c (PREFERRED_SAVE_FACTOR): New macro.
+        (reset): If the buffer has already been allocated, set bufsalloc to
+        be bufalloc / PREFERRED_SAVE_FACTOR.  This avoids problems when
+        bufsalloc == bufalloc (possible after reading a large binary file).
+        (reset): Use PREFERRED_SAVE_FACTOR instead of magic constant.
+        Do not set bufbeg; nobody uses it.
+        Always set buflim.
+        Check for lseek error.
+        Use SEEK_CUR, not a magic constant.
+        (fillbuf): Return an error indication, not a count.
+        All callers changed.
+        Do not assume ssize_t fits in int.
+        Use PREFERRED_SAVE_FACTOR instead of magic constant.
+        Clean up mmap code.
+        Do not attempt to mmap zero bytes.
+        Check for lseek error.
+        Use SEEK_SET, not a magic constant.
+        Work correctly if read is interrupted.
+        (grepfile): Work correctly if open or close is interrupted.
+
+        * src/system.h (SEEK_SET, SEEK_CUR): New macros.
+
+1999-10-02 Alain Magloire
+
+        * src/regex.[ch]: upgrade from GNU lib C source tree.
+
+        * make beta 2.3f available.
+
+1999-10-02  Paul Eggert
+
+        * NEWS: egrep is now equivalent to 'grep -E'.
+        The lower bound of an interval is not optional.
+        You can specify a matcher multiple types without error.
+        -u and -U are now allowed on non-DOS hosts, and have no effect.
+        * doc/grep.texi: Likewise.
+        * doc/grep.1: Likewise.
+        Fix some troff bugs that prevented 'groff' from rendering the page.
+
+        * src/egrepmat.c, src/fgrepmat.c, src/grepmat.c (default_matcher):
+        Remove.
+        (matcher): Add.
+        * src/grep.h (default_matcher): Remove.
+        (matcher): Now exported from ?grepmat.c, not grep.c.
+
+        * src/dfa.c (lex): If { would start an invalid interval specification,
+        treat it as a normal character.
+        Remove (broken) support for {,M} meaning {0,M}.
+        Diagnose bogus intervals like {1,0}.
+        (closure): maxrep is now -1 to indicate no limit, not zero;
+        zero is a valid value for maxrep, meaning an upper bound of zero.
+
+        * src/grep.c (short_options): New constant.
+        (long_options, main): -u and -U are now supported on Unix,
+        with no effect.
+        (matcher): Removed; now defined by ?grepmat.c.
+        (install_matcher): Renamed from setmatcher.
+        (setmatcher): New function.
+        (usage): Report new, more uniform option scheme.
+        (main): Do not initialize matcher; ?grepmat.c now does this.
+        Rely on setmatcher to catch matcher conflicts.
+        Default matcher is "grep".
+
+        * src/search.c (matchers):
+        Remove "posix-egrep" matcher; no longer needed.
+        (Ecompile): Likewise.
+        The egrep matcher now has POSIX behavior.
+
+        * tests/bre.tests: grep '\{' is no longer an error.
+        Fix test for interval too large, and enable it.
+        * tests/ere.tests: grep -E {1 is no longer an error
+        Likewise for a{1, a{1a, a{1a}, a{1,x}.
+
+1999-09-22  Paul Eggert
+
+        * largefile.m4 (AC_SYS_LARGEFILE_FLAGS): Work around GCC
+        2.95.1 bug with HP-UX 10.20.
+
+1999-09-12  Paul Eggert
+
+        * src/grep.c (fillbuf): Fix typo: we sometimes reported
+        arithmetic overflow even when there wasn't any.
+
+1999-09-12  Paul Eggert
+
+        * configure.in (AC_CHECK_FUNCS): Add memmove.
+
+        * src/system.h (S_ISREG): New macro.
+        (memmove): Define if ! defined HAVE_MEMMOVE && ! defined memmove,
+        not if !defined STDC_HEADERS.  This is needed for SunOS 4.1.4,
+        which defines STDC_HEADERS but lacks memmove.
+
+        * src/grep.c (bufoffset): Needed even if !defined HAVE_MMAP.
+        (reset): Always fstat the file, since we always need its size if it is
+        regular.
+        Similarly, get the buffer offset of every regular file.
+        Set bufmapped to 0 if the file's initial offset is not a multiple
+        of the page size.
+        (fillbuf): Calculate an upper bound on how much memory we should
+        allocate only for regular files, since we don't know the sizes of
+        other files.
+        Don't bother to check whether the file offset is a multiple of the page
+        size, since we now do that just once in 'reset'.
+        When an mmapped area would fall past the end of the file, trim it to
+        just before instead of giving up immediately and doing a 'read';
+        that avoids a worst-case behavior that could read half an mmapped file.
+        Fix bug when computing offsets on hosts that don't have mmap.
+
+1999-08-27  Paul Eggert
+
+        * src/system.h (memmove): New macro.
+
+        * src/grep.c (page_alloc): Reallocate the old buffer instead
+        of having both old and new buffers active simultaneously.
+        Remove valloc debugging variant, which no longer applies.
+
+        (fillbuf): Rejigger the buffer allocation mechanism.  The old
+        mechanism could allocate more than 10*N bytes for an N-byte
+        file, which was excessive.  Check for arithmetic overflow a
+        bit more carefully.
+
+1999-08-25  Paul Eggert
+
+        * src/grep.c (grepdir):
+        Don't assume that st_ino and st_dev must be integers;
+        POSIX allows them to be floating-point (!).
+
+        * src/vms_fab.h (arr_ptr): ':' -> ';' to fix typo.
+
+1999-08-18  Alain Magloire
+
+        * 2.3e snapshot.
+
+1999-08-18  Alain Magloire
+
+        * src/search.c: On a CRAY J90 system running UNICOS 8.0.
+        Compilation of ./src/search.c failed because the declaration of
+        the variable "regex":
+          static struct re_pattern_buffer regex;
+        conflicted with a previous declaration search.c #includes "system.h",
+        which #includes <stdlib.h>, which declares :
+        extern char *regex __((char *_Re, char *_Subject, ...));
+        The declaration in search.c is local to that one source file.
+        I just changed its name to something less likely to conflict.
+        (I called it "regexbuf", but you could pick any name you want.)
+        Excerpt email from Dean Kopesky.
+
+1999-08-16  Paul Eggert
+
+        Upgrade large-file support to the version used in tar and
+        textutils.
+
+        * Makefile.am (ACLOCAL_AMFLAGS): Define to be empty.
+        (M4DIR, ACINCLUDE_INPUTS): New macros.
+        ($(srcdir)/acinclude.m4): New rule.
+
+        * configure.in (AC_CANONICAL_HOST, AM_C_PROTOTYPES): Add.
+        (AC_SYS_LARGEFILE): Renamed from AC_LFS, for compatibility
+        with what should appear in the next autoconf release.
+
+        * m4/largefile.m4: Renamed from m4/lfs.m4.
+
+        * src/ansi2knr.1, src/ansi2knr.c, config.guess, config.sub:
+        New files.  config.guess and config.sub ar needed by the new
+        AC_SYS_LARGEFILE.  ansi2knr is needed by AM_C_PROTOTYPES,
+        which in turn is needed by the new AC_SYS_LARGEFILE.
+
+1999-08-16  Alain Magloire
+
+        * 2.3d snapshot on ftp server.
+
+1999-07-26  Paul Eggert
+
+	Several GNU tools have options to process arbitrary file names, even
+	file names that contain newline characters.  These include 'find
+	-print0', 'perl -0', 'sort -z', and 'xargs -0'.  It'd be handy if GNU
+	grep also processed such file names.  Here's a proposed patch to do
+	this, relative to grep 2.3c.  This patch introduces two options, one
+	for the data, and one for the file names.  (Sometimes one wants
+	null-terminated file names in the output, and sometimes one wants to
+	process lists of null-terminated strings, and these are orthogonal
+	axes.)
+
+        * NEWS, doc/grep.texi: New -z or --null-data and -Z or --null options.
+        * src/grep.c (long_options, usage, main): Likewise.
+
+        * src/dfa.h (dfasyntax): New eol parameter.
+        * src/dfa.c (eolbyte): New var.
+        (dfasyntax): Set it from new parameter.
+        (lex, dfastat, build_state, dfaexec): Use it instead of '\n'.
+
+        * src/grep.h (eolbyte): New decl.
+        * src/grep.c (eolbyte): New var.
+        (nlscan, prpending, prtext, grepbuf, grep): Use it instead of '\n'.
+        (filename_mask): New var.
+        (prline, grepfile): Output NUL separator if filename_mask is zero.
+        (grep): Look for '\200' as the hallmark of a binary file, not '\0',
+        if -z or --null-data is specified, since it implies that '\0' is
+        expected as text.
+
+        * src/search.c (Gcompile, Ecompile): Pass eolbyte to dfasyntax.
+        (EGexecute, Fexecute): Use eolbyte instead of '\n'.
+
+1999-06-15 Alain Magloire
+
+        * src/grep.c, doc/grep{1,texi} :
+        --revert-match should be --invert-match.
+        Correction proposed by Karl Berry.
+
+1999-06-12 Alain Magloire
+
+        * doc/grep.{1,texi}: add description for --with-filename.
+        Noted missing by UEBAYASHI Masao.
+
+1999-03-17 Paul Eggert
+
+        * NEWS: Add GREP_OPTIONS.
+
+        * doc/grep.texi: Document GREP_OPTIONS, and the other
+        environment variables.  Fix doc for [:blank:], [:cntrl:], [:punct:].
+
+        * src/grep.c (prepend_args, prepend_default_options): New functions.
+        (main): Use them to implement GREP_OPTIONS.
+        * src/system.h (getenv): New decl.
+
+1999-03-16 Volker Borchert
+
+        * configure.in: Use case case ... esac for  checking Visual C++.
+        When ${CC} contains options it was not recognize.
+
+1999-03-07 Paul Eggert
+
+        * src/grep.c (usage): Don't report -E, -F, and -G unless we're grep.
+        (main): Don't match options -E, -F, and -G unless we're grep.
+        Remove after-the-fact check for options -E, -F, and -G, since
+        they're no longer needed.
+
+1999-03-05  Eli Zaretskii
+
+        * src/grep.c (main): Print the name of the default matcher instead
+        of just "grep".
+
+1999-02-06 Alain Magloire
+
+        * tests/*.awk : Linux users are seeing "Broken Pipe" on make check.
+        The problem is that grep does not drain its stdin, thus the previous
+        process in the pipeline receives a SIGPIPE.  Other shells are silent
+        about this.  There is actually no failure, since the broken pipe is
+        expected.  You can work around it by changing the pipeline, so that
+        the input is drained, like this:
+        status=`echo 'check' | { ${GREP} -E -e pattern >/dev/null 2>&1;
+        echo $?; cat >/dev/null; }`; if test $status -ne $errnu then ... fi
+        Excerpt email from Andreas Schwab.
+
+1999-02-23 Alain Magloire
+
+        * src/grep.c : Restrict the use of -E, -F, -G
+        to only grep driver, Posix behaviour. {f,e}grep
+        the matcher is already set. This change may brake
+        scripts, warn in NEWS.
+
+        * doc/grep.{1,texi} : -C takes arguments, upgrade manual.
+
+        * beta 2.3a
+
+1999-02-23 Alain Magloire
+
+        * configure.in : Change the configure VC test from
+        'test x$ac_cv_prog_CC = xcl;' to 'test x"$ac_cv_prog_CC" = xcl;'
+        Email from Joshua R. Poulson.
+
+1999-02-23 Paul Eggert
+
+        Fix porting bug reported by Amakawa Shuhei for SunOS 4.1.4-JL.
+        The btowc.c shipped with grep 2.3 is incorrect for Solaris
+        2.5.1 and earlier, as it assumes UTF8, which these OSes do not
+        support.  Solaris 7 supports btowc, so there's no need to ship
+        a substitute for it.  The only questionable case is Solaris
+        2.6, which lacks btowc but does support UTF8.  However, 2.6
+        supports UTF8 but only as a demonstration (for an English
+        locale!); Japanese Solaris 2.6 users typically use EUC, or
+        sometimes shift-JIS, but they cannot use UTF8 since Japanese
+        UTF8 is not supported.  Hence there's no point to having grep
+        substitute a btowc that uses UTF8, as it is either redundant,
+        or it will almost invariably have incorrect behavior.
+
+        * configure.in (AC_CHECK_HEADERS): Don't set USE_WCHAR.
+        (AC_CHECK_FUNCS): Add btowc, wctype.
+        (AC_REPLACE_FUNCS): Don't replace btowc; our replacement is
+        invariably doing the wrong thing anyway, at least on SunOS/Solaris.
+        Don't bother to check for wctype in -lw, as we don't support
+        wide characters on Solaris 2.5.1 or earlier anyway.
+
+        * bootstrap/Makefile.try (OBJS): Remove btowc.$(OBJEXT).
+
+        * src/btowc.c: Removed; no longer needed.
+
+1999-02-19  Paul Eggert
+
+        * NEWS: Fix typo when talking about the old behavior of
+        silently skipping directories; it was grep 2.1, not grep 2.2.
+
+1999-02-15 Alain Magloire
+
+        * bootstrap/Makefile.try : add DJGPP DEFS.
+        Done by Elie Zaretsckii.
+
+1999-02-14 Alain Magloire
+
+        * m4/gettext.m4 : Guard [] with changequote.
+        From Elie Zaretskii.
+
+        * djgpp/config.bat : Makefile.in.in --> Makefile.in-in
+        From Elie Zaretskii.
+
+        * src/dosbuf: k&r function parameter.
+
+        * release of 2.3.
+
+1999-02-10 Alain Magloire
+
+        * bootstrap/{Makefile{try,am},REAMDE} : skeleton
+        provided for system lacking the tools to autoconfigure.
+
+        * src/{e,f,}grepmat.c: added guard [HAVE_CONFIG_H]
+
+1999-02-10 Alain Magloire
+
+        * PATCHES-AC, PATCHES-AM: updated.
+
+        * m4/regex.m4 : updated.
+
+1999-02-05 Eli Zaretskii
+
+        * m4/gettext.m4 : Support DOS-style D:/foo/bar absolute file
+        names.
+
+        * aclocal.m4 (DJGPP) : Use $DJ_GPP instead, since changing the
+        latter prevents GCC from finding headers and libraries.
+
+        * djgpp/config.bat: Make building from another directory work
+
+        * djgpp/config.sed: Remove redundant command that edited path
+        separator: now done by configure.
+
+        * src/grep.c [O_BINARY]: Add prototype for undossify_input.
+
+        * doc/grep.texi (Introduction): Typo fixed.
+
+1999-02-03 Alain Magloire
+
+        * grep-2.2f beta release.
+
+1999-02-02 Alain Magloire
+
+        * m4/{djgpp,envsep,glibc,regex,dosfile,isc-posix}.m4 :
+        New files to aid configuration and unload configure.in.
+        * m4/Makefile.am : updated.
+        * src/btowc.c : protect for wchar.h
+
+1999-01-28 Alain Magloire
+
+        * intl/Makefile.in: Replace .o with .${ac_objext} where necessary.
+        Work around a limitation of Visual C++ on Cygwin32.
+        * acconfig.h configure.in: Define 'alloca' as '_alloca' when CC=cl.
+        This little hack was suggested by Ian Roxborough <irox@cygnus.com>.
+        Patch forwarded by Ben Elliston.
+
+1999-01-28 Alain Magloire
+
+        * PATCHES-AM: New file. A small patch for automake-1.4, use $(sep)
+        as the path separator base on @SEP@.
+        * PATCHES-AC configure.in : updated for autoconf-13.
+
+1999-01-27 Volker Borchert
+
+        * grep.c: fgrep -NUM not working correctly.
+        add the argument number to digit_args_val.
+
+1999-01-22 Paul Eggert
+
+        Prevent grep -r from recursing infinitely through directory loops via
+        symbolic links.
+
+        * grep.c (struct stats): New type.
+        (stats_base): New var.
+        (bufstat): Remove; subsumed by stats->stat.
+        (reset, fillbuf, grep, grepdir, grepfile): Pass struct stats * arg,
+        for directory loop checking; use this instead of the bufstat global.
+        All callers changed.
+        (grepfile): Stat the file before invoking grepdir.
+        (grepdir): Assume that the argument has already been statted.
+        No longer a need for a directory size argument, since it
+        can be gotten from the struct stats * argument.
+        Check for directory loops.
+        Create linked list of directories currently being visited,
+        to detect loops.
+
+1998-12-29 Kaveh R. Ghazi
+
+        intl/localealias.c: When building grep-2.2e using cc on Irix4,
+        I needed the following patch to intl/localealias.c.
+        (Its the same patch used by fileutils-4.0.) The patch resolves
+        conflicts between char* and unsigned char* in the i18n code.
+
+1998-12-10 Alain Magloire
+
+        * src/grep.c : Typo in contex -->context
+        Noted by  Vladimir Michl.
+
+1998-12-01  Alain Magloire
+
+        * doc/Makefile.am djgpp/Makefile.am m4/Makefile.am vms/Makefile.am:
+        New files.
+
+        * m4/progtest.m4: proctect '[]' from m4.
+        Noted by Eli Z.
+
+        * PATCHES-AC: New file, add the patch for autoconf in the dist.
+
+        * acconfig.h: (HAVE_DOS_FILENAME)
+
+        * TODO: updated.
+
+        * src/search.c: remove obsolete 'gegrep,ggrep,gnugrep'
+        matchers. grep no longer depend on argv[0].
+
+        * grep-2.2e beta to test DJGPP port.
+
+1998-11-28  Paul Eggert
+
+        Various portability enhancements:
+        - Don't assume that O_BINARY implies DOS.  Use separate
+        macros D_OK (for DOS-like directory access) and
+        HAVE_DOS_FILE_NAMES (for DOS-like file names).
+        - Don't assume that off_t fits into long; it doesn't on Solaris 2.6.
+        - Have is_EISDIR set errno properly on hosts with screwed-up EISDIR.
+        - Treat ':' specially in DOS file names only if it's the end of a
+        drive specifier.
+        - Protect against errno < 0.
+
+        * src/grep.c (is_EISDIR): Move defn to system.h.
+        (print_offset_sep): New function.
+        (fillbuf): Remove redundant test of O_BINARY.
+        (totalcc, totalnl): Now of type off_t.
+        (prline): Use print_offset_sep to print file offsets.
+        (grepfile): Don't set e to EISDIR; that's is_EISDIR's responsibility
+        on machines that don't work properly with EISDIR.
+        (grepdir): Don't assume ':' means slash on all DOS filenames;
+        it means it only in the file prefix.
+
+        * src/system.h (strerror): Check for negative error numbers.
+        (is_EISDIR): Depend on D_OK, not O_BINARY.
+        (SET_BINARY): Depend on HAVE_SETMODE, not __DJGPP__.
+        (IS_SLASH, FILESYSTEM_PREFIX_LEN): Depend on HAVE_DOS_FILE_NAMES,
+        not O_BINARY.
+        (CHAR_BIT): New macro.
+
+        * src/dosbuf.c (struct dos_map):
+        pos and add members are now of type off_t.
+        (dos_stripped_crs): Now of type off_t.
+        (dossified_pos): Now accepts arg and returns value of type off_t.
+
+        * configure.in (AC_CHECK_FUNCS): Add setmode.
+        (HAVE_DOS_FILENAMES): New macro
+
+1998-11-27  Eli Zaretskii
+
+        * djgpp/config.sed: New file, a Sed script to edit configure
+        script before running it on DOS/Windows.
+        * djgpp/config.bat: Updated to handle po2tbl.sed.in and
+        po/Makefile.in.in on DOS filesystems, and to run config.sed.
+
+1998-11-24  Jim Meyering
+
+        * src/grep.c : Typo s/infalid/invalid/
+        Also noted by Stanislav Brabec.
+
+1998-11-24  Eli Zaretskii
+
+        * doc/grep.texi: I found and corrected several typos.
+        I believe the GNU standards require the section that describes the
+        options to the programs to be called "Invoking" or "Invoking
+        <program-name>".  This is so users and programs can easily find
+        that node in any Info file.  So I changed the name of the
+        "Options" chapter to "Invoking", and corrected the
+        cross-references accordingly.
+        I added some markup to things like file names and options.
+        I added some additional index entries where that seemed useful.
+        I also corrected some index entries, such as "@cindex [:alnum:]",
+        which used a colon in them (the colons confuse Info readers).
+
+1998-11-24  Alain Magloire
+
+        * grep/doc/grep.texi : -h is not use for help.
+        Nit spotted by Jim Meyering.
+
+1998-11-23  Alain Magloire
+
+        * doc: New directory, grep.1, {e,f}grep.man move here
+        * doc/grep.texi: New info manual
+        * doc/version.texi: New
+        * doc/Makefile.am: New
+        * tests/{ere,bre}.*: New files. The spencer2 test is split
+        in two ere/bre.
+        * config.hin: New, config.h.in rename to config.hin for OS
+        with limited file system aka DOS.
+
+        * grep-2.2d release for beta.
+
+1998-11-18  Alain Magloire
+
+        * src/regex.[ch] : Updated from GLibc, previous patches were
+        integrate by Ulrich Drepper and some added ones.
+
+1998-11-16  Paul Eggert
+
+        * grep.h (__attribute__): New macro, if not GCC.
+        (fatal): Add __attribute__((noreturn)).
+        * grep.c (usage): Add __attribute__((noreturn)).
+
+1998-11-16  Paul Eggert
+
+        Remove memory leak with valloced buffers, by invoking malloc instead.
+
+        * configure.in (AC_CHECK_FUNCS), src/system.h (valloc): Remove.
+        * src/grep.c (page_alloc): New function.
+        (ubuffer, pagesize): New vars.
+        (ALIGN_TO): New macro.
+        (reset): Initialize new vars.  Check for overflow in buffer size calc.
+        Use page_alloc instead of valloc.
+        (fillbuf): Likewise.  Use memcpy to copy saved area.
+
+1998-11-15  Paul Eggert
+
+        * dfa.c (dfacomp), search.c (EGexecute): Don't assume char is unsigned.
+
+1998-11-14  Paul Eggert
+
+        * src/grep.c (grepdir): Fix bug: memory freed twice.
+
+        * src/search.c (Gcompile, Ecompile): Don't invoke dfainit,
+        since dfacomp does it for us, and if we also do it then we
+        leak memory.
+
+1998-11-13  Eli Zaretskii
+
+        * djgpp/config.bat: Rewrite to run the configure script via Bash.
+        * djgpp/config.site, djgpp/getconf: New files.
+        * djgpp/config.h, djgpp/*.mak, djgpp/po2tbl.sed: Remove.
+        * djgpp/README: Update instructions.
+
+        * Makefile.am (EXTRA_DIST): Update the list of DJGPP files.
+
+        * src/system.h (IS_SLASH): New macro.
+        (is_EISDIR): Define it here for DOS and Windows.
+
+        * src/grep.c (main) [O_BINARY]: Set stdout to binary mode, so the
+        EOL formats of the input and output files match, unless stdout is
+        the console device.
+        (is_EISDIR): Don't define if already defined.  Accept a second
+        argument, the file name; all callers changed.
+        (grepdir): Don't free 'file', inside the loop.  Use IS_SLASH to
+        check whether 'dir' needs a slash.
+        (grepfile): If file is a directory, set e to EISDIR.
+
+1998-11-10  Alain Magloire
+
+        * src/vms_fab.{c,h}: New file for VMS wildcard expansion
+        Written by Phillip C. Brisco.
+
+        * vms/make.com : add line to compile vms_fab.c and
+        {e,f,}grepmat.c with link for each grep/fgrep/egrep.
+        Base on patch send by Phillib C. Brisco.
+
+1998-11-09  Alain Magloire
+
+        * grep-2.2c on alpha for testing.
+
+1998-11-09  Paul Eggert
+
+        * src/grep.1: Fix "Last Change" of output by generating the date
+        from the RCS Id.
+
+        * src/grep.c (is_EISDIR): New macro.
+        (grep): If -s, suppress errors from trying to read directories.
+        (grepfile): Use is_EISDIR to simplify code.
+        (grepdir): If -s, suppress errors from trying to read directories.
+
+        * src/grep.1: Fix -q -r -s problems; describe BSD grep better.
+
+        * src/grep.c (main): Update copyright.
+
+        Specify default matcher with default_matcher extern var, not
+        DEFAULT_MATCHER macro.  This is more straightforward and means
+        we need to compile grep.c just once.
+
+        * src/egrepmat.c, src/fgrepmat.c, src/grepmat.c: New files.
+
+        * src/Makefile.am (base_sources): New macro.
+        (egrep_SOURCES, fgrep_SOURCES, grep_SOURCES): Now consist of
+        $(base_sources) plus the single tailoring file.
+        (grep_LDADD, egrep_LDADD, fgrep_LDADD): Remove.
+        (EXTRA_DIST): Remove grep.c, regex.c.
+        (fgrep.o, egrep.o): Remove.
+
+        * src/grep.h (matcher): Now char const *.
+        (default_matcher): New decl.
+
+        * src/grep.c (matcher): Now char const *.
+        (setmatcher): Now accepts char const *.
+        (main): Default the matcher from default_matcher (linked externally)
+        rather than DEFAULT_MATCHER (a macro).
+
+1998-11-08 Alain Magloire
+
+        * src/grep.1: 'prep.ai.mit.edu' should be replaced with 'gnu.org'.
+        Nit from Paul Eggert.
+
+1998-11-06 Alain Magloire
+
+        * src/grep.c: The Matcher is not set to argv[0] but
+        explicitly by a #define MATCHER at compile time default is "grep".
+
+        * aclocal/: NEW dir. provides our own *.m4
+
+        * configure.in: Move Paul's Large Files to AC_LFS.(aclocal/lfs.m4)
+        Taken from Jim Meyering fileutils.
+
+1998-11-05 Alain Magloire
+
+        * src/grep.1: update the man pages according to the
+        changes make by Miles.
+
+        * po/*.po: updated.
+
+        * first beta release for 2.3 (2.2a).
+
+1998-11-04 Miles Bader
+
+        * src/grep.c (main): Rationalize interaction of -C/-NUM/-A/-B
+        options, and allow -C to have an optional argument. -NUM can
+        now be mixed with -C, and -A, -B always take precedence over
+        -C/-NUM, regardless of order.
+        (long_options): Let -C/--context take an optional argument.
+
+1998-11-03 Alain Magloire
+
+        * src/dfa.c: HP-UX define clrbit/setbit as macros in <sys/param.h>
+        #undef if defined.
+        Fixed by Andreas Ley and Philippe Defert.
+
+        * src/grep.1 : mention that -s follows POSIX behavior.
+        Noted by Paul Eggert and others.
+
+        * tests/khadafy.sh: a typo in failure(s).
+        Spotted By Sotiris Vassilopoulos.
+
+1998-11-01  Paul Eggert
+
+        * src/system.h (IN_CTYPE_DOMAIN): New macro.
+        (ISALPHA, ISUPPER, ISLOWER, ISDIGIT, ISXDIGIT, ISSPACE,
+        ISPUNCT, ISALNUM, ISPRINT, ISGRAPH, ISCNTRL): Use
+        IN_CTYPE_DOMAIN instead of isascii.
+
+1998-08-18  Paul Eggert
+
+        Add support for new -r or --recursive (or -d recurse or
+        --directories=recurse) option.
+
+        * src/Makefile.am (grep_SOURCES): Add savedir.c, savedir.h, stpcpy.c.
+
+        * src/grep.1: Describe new options.
+
+        * src/grep.c: Include "savedir.h".
+        (long_options): Add -r or --recursive.
+        (RECURSE_DIRECTORIES): New enum value.
+        (IS_DIRECTORY_ERRNO): Remove.
+        (reset, grep): Add file name arg.
+        (grepdir, grepfile): New functions.
+        (initial_bufoffset): New var.
+        (reset): Initialize it.
+        (fillbuf): Use it.
+        (count_matches, list_files, no_filenames, suppress_errors): New static
+        vars; formerly were local to 'main'.
+        (grep): Recurse through directories if the user asks for this.
+        (usage, main): Add new options.
+        (main): Change some local vars to be static, as described above.
+        Move most of the guts into grepfile function.
+        so that it can be recursed through.
+
+        * configure.in (AC_HEADER_DIRENT, AC_FUNC_CLOSEDIR_VOID): Add.
+        (AC_REPLACE_FUNCS): Add stpcpy.
+
+        * src/savedir.c, src/savedir.h, src/stpcpy.c: New files;
+        taken from fileutils 3.16u.
+
+1998-08-11  Paul Eggert
+
+        * src/system.h (initialize_main): New macro.
+        * src/grep.c (main): Invoke initialize_main first thing.
+
+1998-04-29  Paul Eggert
+
+        * NEWS, src/grep.1: Describe new -a and -d options.
+
+        * src/grep.c (long_options, usage, main):
+        New options -d or --directories and -a or --text.
+        (directories, always_text): New variables.
+        (IS_DIRECTORY_ERRNO): New macro.
+        (reset): Now returns value specifying whether to skip this file.
+        Stat the file if either mmap or directory-skipping is possible.
+        Skip the file if it's a directory and we're skipping directories.
+        (grep): Skip the file if 'reset' tells us to.
+        (main): If open fails because the file is a directory, and if we're
+        skipping directories, don't report an error.
+        Remove special case for DOS and Windows.
+
+        * src/dosbuf.c (guess_type): Use the same method for guessing whether a
+        file is binary as grep.c's grep does.
+        There's no longer any need to declare 'bp' to be unsigned.
+
+1998-04-26 Alain Magloire
+
+        * grep-2.2 release.
+
+        * src/dfa.c: Wrong revision was pulled out
+        for beta 2.1.1d.
+        * src/search.c: Wrong revision was pulled out
+        for beta 2.1.1d.
+
+        * src/grep.c: ck_atoi () added instead of atoi ().
+        Suggestion from Jim Meyering.
+        ck_atoi () pulled from diffutils-2.7, maintained by Paul Eggert.
+
+        * AUTHORS: Rephrase of some sentences.
+        * README:  Rewording.
+        Noted and patched by Joel N. Weber II.
+
+1998-04-17 Kaveh R. Ghazi
+
+        * src/dfa.h: Don't define 'const', trust autoconf to handle it.
+
+1998-04-16 Alain Magloire
+
+        * tests/{status,empty}.sh: wrong return status.
+
+        * src/grep.c: Remove the REGEX part in usage (), it was
+        consider overkill by most.
+
+1998-04-14  Eli Zaretskii
+
+        * djgpp/config.bat: Support file names with multiple dots on all
+        platforms.
+
+        * djgpp/README: Add instructions about file names illegal on
+        MS-DOS.
+
+1998-04-13 Alain Magloire
+
+        * src/dfa.c: by "popular" demand reverse
+        back to '_' not word-constituent.
+
+        * grep-2.1.1c available for testing.
+
+1998-04-13  Karl Heuer
+
+        * src/grep.c: (a) The directory check is done too early:
+        logically, if the argument is "-", then it refers to standard
+        input, regardless of whether there's something in the file
+        system answering to "-".
+        (b) The sh command "grep -l root /etc/passwd /etc/group 0<&-"
+        prints "(standard input)" instead of "/etc/passwd", because it
+        mistakenly believes that a named file will never be opened on fd
+        0.  The string "(standard input)" should be based on the file
+        having been originally specified as "-", rather than making
+        assumptions about the fd.
+        (c) the code that calls close(fd) is being done outside of the
+        test for a bad fd.  Thus, if the open failed, this code will
+        attempt to close(-1).  It should be done inside the "fd != -1"
+        branch.
+        This patch addresses all three of these problems.
+
+1998-04-13 Alain Magloire
+
+        * configure.in: remove the deprecated AC_ISC_POSIX macro.
+        Spotted by Karl Heuer.
+
+1998-04-03  Eli Zaretskii
+
+        * djgpp/main.mak, djgpp/src.mak, djgpp/tests.mak: Updated from the
+        relevant Makefile.in files.
+
+        * djgpp/config.bat: Create files in intl directory like the
+        configure script does.
+
+1998-03-28  Eli Zaretskii
+
+        * djgpp/main.mak, djgpp/src.mak, djgpp/tests.mak: Updated to track
+        changes in respective Makefile.in files.
+
+        * src/dosbuf.c (guess_type): Avoid running off the end of the
+        buffer.  Spotted by Paul Eggert.
+
+1998-03-27  Alain Magloire
+
+        * grep-2.1.1b.tar.gz available.
+
+        * src/regex.c: CLASS_CHAR_MAX set to 256 instead of 6
+        when WCTYPE and WCHAR are not defined. When class names
+        where bigger then 6, it will not detect an error.
+        example '[[:alphabet:]]'.
+
+        * Updated the copyright of the files with emacs.
+        With emacs Jim :).
+
+1998-03-26 Jim Meyering
+
+        * src/dfa.c (IS_WORD_CONSTITUENT): Define.
+        (lex): Use IS_WORD_CONSTITUENT, not ISALNUM.
+        Don't special-case '_'.
+        (dfastate): Use IS_WORD_CONSTITUENT, not ISALNUM.
+        (dfaexec): Likewise.
+
+1998-03-25  Alain Magloire
+
+        * tests/warning.sh: typos and replace the echos with
+        a simple cat.
+        Noted By Jim Meyering.
+
+        * src/regex.c: #undef ISASCII and ISPRINT before defining
+        them(On Solaris it was define).
+        Pattern 'a[[:]:]]b' is an invalid char class and the error
+        from regex was 1(REG_NOMATCH) instead of 2 (REG_ECTYPE).
+        Fix with help from Ulrich Drepper.
+
+        * src/grep.c (usage): Ulrich wrote: "A single printf should
+        not have more than 900 bytes. For translation reasons the
+        text shouldn't be split in too many pieces since this is
+        tiresome and also does not help to generate a consistent picture."
+        Noted by Ulrich Drepper.
+        * src/grep.c (usage): Dig out and old patch from
+        Franc,ois to explain the regex in usage().
+        Ideas from Franc,ois Pinard.
+
+1998-03-23 Alain Magloire
+
+        * testing: grep-2.1.1a for testing.
+
+        * configure.in: Solaris needs '-lw' if we use wchar/wctype
+        functions.
+        * src/btowc.c: New file from GNU libc. Solaris 2.5 don't
+        have it define.
+        * configure.in : check for btowc ().
+
+        * regex.c: Include <wchar.h> before <wctype.h>, to work around
+        a Solaris 2.5 bug.
+        Patch provided by Paul Eggert.
+
+        * tests/status.sh: new file to check return status code.
+        * tests/empty.sh: new file to check for empty pattern.
+        * tests/warning.sh: new file to tell where to report errors.
+
+        * configure.in: If available, prefer support for large files
+        unless the user specified one of the CPPFLAGS, LDFLAGS, or LIBS
+        variables.
+        Done by Paul Eggert.
+
+        * src/grep.c (usage): change prep.ai.mit.edu for gnu.org.
+
+1998-03-18 Alain Magloire
+
+        * src/grep.c (usage): Formating the --help message a bit off.
+        Noted by William Bader.
+
+        * src/grep.c (main): When checking conflicting matcher for option -E the
+        matcher was to "egrep" instead of "posix-egrep".
+        Reported by kwzh@gnu.org.
+
+        * src/grep.c: Typos and rewording the --help message.
+        Reported by Karl Heuer.
+
+        * src/grep.1: The man page wording :
+          A regular expression matching a single character may be
+          followed by one of several repetition operators:
+        is unclear since 'x(yz)*z' is a valid regex.
+        Remove the "matching a single character".
+        Suggested by Harald Hanche-Olsen.
+
+        * src/grep.c (main): '-f /dev/null' now specifies no patterns
+        and therfore matches nothing.
+        Reported by Jorge Stolfi.
+        Patched by Paul Eggert.
+
+1998-03-10 Alain Magloire
+
+        * Ice storm 98(el nino). Lost grep repository disk,
+        and my $HOME directory, etc ..
+        Trying to get the emails/patch from dejanews.com
+        and start from grep-2.1.
+        sigh ....
+
+1997-11-01 Alain Magloire
+
+        * src/grep.c: For the long options, the problems are:
+        --file appears in the option table as 'no_argument'
+        instead of 'required_argument'.
+        --files-with-matches is missing from the option table.
+        The help lists '--fixed-strings' as the long option for -F,
+        the table has '--fixed-regexp'.
+        --regexp appears in the option table as 'no_argument'
+        instead of 'required_argument'.
+        --with-filename is missing from the option table.
+        Reported by Grant McDorman and Krishna Sethuraman.
+
+1997-10-19 Alain Magloire
+
+        * src/grep.c: the option "with-filename was not in the arg table.
+        Corrected by Jim Hand.
+
+        * GNU gettext library from gettext-0.10.32.
+
+        * src/grep.c: reverse back to greping directories,
+        One could skip the error message by defining
+        SKIP_DIR_ERROR. There is no clear way of doing
+        things, I hope to setle this on the next majore release
+        Thanks Paul Eggert, Eli Zaretskii and gnits for the
+        exchange.
+
+        * tests/status.sh: add this check to make sure
+        That the return status code is ok.
+
+1997-10-10 Andreas Schwab
+
+        * src/grep.1: Fix formatting.
+
+        * configure.in: Check for wctype.h, wchar.h, libintl.h and
+        isascii, which are needed for regex.c.
+
+1997-10-01 Paul Eggert
+
+        * src/grep.c (fillbuf): Don't warn about mmap failures.
+
+1997-09-7 Alain Magloire
+
+        * src/grep.c: added code for -H --with-filename.
+
+        * djgpp/*: patch wrongly apply
+        duplication of text in djgpp/{README,config.h}.
+        Filter djgpp/config.bat with unix2dos.
+
+        * djgpp/make.mak: beautify
+        From Eli Zaretskii.
+
+        * grep-2.1 release.
+
+1997-09-01 Alain Magloire
+
+        * grep-2.0f out for testing.
+
+        * update to GNU gettext library from gettext-0.10.31
+
+        * grep.c : have a nicer format for --version.
+        Noted by Ulrich Drepper.
+
+        * obstack.[ch]: updated from GNU C library
+        * configure.in: look for stdlib.h [HAVE_STDLIB_H]
+        Comments from Ulrich Drepper.
+
+1997-08-25 Philippe De Muyter  <phdm@info.ucl.ac.be>
+
+        * src/dfa.c (sys/types.h): File included unconditionnaly.
+
+1997-08-16  Eli Zaretskii  <eliz@is.elta.co.il>
+
+        * grep.c (long_options) [O_BINARY]: Add DOS-specific options.
+        (fillbuf) [O_BINARY]: For DOS-style text files, strip CR
+        characters at end of line.
+        (prline) [O_BINARY]: Report correct byte offsets, even though CR
+        characters were stripped when reading the file.
+        (usage) [O_BINARY]: Add DOS-specific options.
+        (setmatcher) [HAVE_SETRLIMIT]: Set re_max_failures so that the
+        matcher won't ever overflow the stack.
+        (main) [__MSDOS__, _WIN32]: Handle backslashes and drive letters
+        in argv[0], remove the .exe suffix, and downcase the prgram name.
+        [O_BINARY]: Pass additional DOS-specific options to getopt_long
+        and handle them.  Call stat before attempting to open the file, in
+        case it is a directory (DOS will fail the open call for
+        directories).  Switch the input descriptor to binary mode, unless
+        it is a terminal device.
+
+        * system.h [O_BINARY]: Define macros to switch a handle to binary
+        mode, so binary files could be grep'ed on MS-DOS and MS-Windows.
+        [HAVE_SETLOCALE]: Test for HAVE_SETLOCALE instead of
+        HAVE_LC_MESSAGES, to prevent compilation error in grep.c on
+        systems which don't define HAVE_LC_MESSAGES, but have setlocale.
+
+        * dosbuf.c: New file, functions specific for MS-DOS/MS-Windows.
+        (guess_type, undossify_input, dossified_pos): New functions.
+
+        * djgpp/config.h, djgpp/config.bat, djgpp/main.mak, djgpp/src.mak,
+        djgpp/po.mak, djgpp/intl.mak, djgpp/tests.mak, djgpp/po2tbl.sed:
+        New files, for building Grep with DJGPP tools for MS-DOS and
+        MS-Windows.
+
+        * grep.1: Document DOS-specific switches.
+
+1997-08-08 Alain Magloire
+
+        * grep-2.0e: available for testing
+
+        * grep.c: change LC_MESSAGE to LC_ALL for (LC_CTYPE).
+        Suggested by Jochen Hein.
+
+        * ABOUT-NLS: updated.
+        * grep.c: --version: more verbosity (COPYRIGHT).
+        * grep.c: --help: PATTERN, FILE instead of <pattern>, <file>.
+        * INSTALL.grep: not necessary removed.
+        * configure.in: --disable-regex rename --without-include-regex.
+        * THANKS: format: first row name, second email.
+        * ChangeLog: format ISO 8601.
+        Reported by Franc,ois Pinard.
+
+        * grep.c: move dcl of struct stat st into "else" where it's used.
+        Reported by Jim Meyering.
+
+        * grep.c: totalnl should be %u in printf.
+        Reported by Michael Aichlmay
+        Corrected with guidance from Ulrich Drepper
+
+1997-07-24 Alain Magloire <alainm@rcsm.ee.mcgill.ca>
+
+        * Makefile.am: corrected an error when installing {f,e}grep.1.
+        From Kaveh R. Ghazi <ghazi@caip.rutgers.edu>.
+        From Ulrich Drepper <drepper@cygnus.com>.
+
+        * Many files: use PARAMS instead of __STDC__ for prototypes.
+        From Jim Meyering <meyering@eng.ascend.com>.
+        Patch provided by Kaveh R. Ghazi <ghazi@caip.rutgers.edu>.
+
+        * dfa.[ch]: uses the one in gawk-3.0.3 with the patch from
+        Arnold (see Changelog: July 12 1997)
+
+        * grep.1: a note to say -l, -L, -q stop on first match.
+        Noted by Andrew Beattie <gaffer@tug.com>.
+
+        * grep.c: refuse to scan if the file is a directory.
+        This was causing problems on SUNs. If the directory contains
+        a file that could match the pattern, garbage was display.
+
+        * tests directory: added new set of tests from Henry Spencer
+        regex package. Change the way the tests were done to be more
+        conformant to automake.
+
+        * configure.in: added --disable-regex for folks with their own fuctions.
+
+        * grep-20d : available for testing
+
+1997-07-18 Alain Magloire <alainm@rcsm.ee.mcgill.ca>
+
+        * grep-2.0c: available for testing
+
+1997-07-17 Alain Magloire <alainm@rcsm.ee.mcgill.ca>
+
+        * src/grep.c: Cause grep to fail if 'fclose (stdout)' fails.
+        From Jim Meyering <meyering@eng.ascend.com>.
+
+        * grep.c:usage() more consistency in the --help.
+
+        * egrep, fgrep were links This is in violation of GNU standards:
+        "Please don't make the behavior of a utility depend on the name used
+        to invoke it.  It is useful sometimes to make a link to a utility with
+        a different name, and that should not change what it does."
+        For now egrep and fgrep will be copies of grep. A better scheme
+        should be found later.
+        After discussion with Tom Tromey <tromey@cygnus.com>.
+
+        * fgrep.man and egrep.man included: They are stubs that call grep.1.
+        * Makefile.am: modified to install {f,e,}grep[,.1].
+
+        * speed hack for -l, -L: bail out on first match.
+        From Scott Weikart <scott@igc.apc.org>.
+
+        * *.[ch]: provided prototypes for strict argument checking
+        With the help of Stewart Levin <stew@sep.stanford.edu>.
+
+1997-07-16 Alain Magloire <alainm@rcsm.ee.mcgill.ca>
+
+        * configure.in: typo in the creation of po/Makefile
+        Noted by Volker Borchert bt@teknon.de.
+
+        * grep-2.0b: make it available for testing.
+
+1997-07-15 Alain Magloire <alainm@rcsm.ee.mcgill.ca>
+
+        * src/grep.c usage(): cut the --help in smaller printf()'s
+        Noted by Ulrich Drepper <drepper@cygnus.com>.
+
+1997-07-14 Alain Magloire <alainm@rcsm.ee.mcgill.ca>
+
+        * grep-2.0a: make an alpha available for testing.
+
+1997-07-12 Alain Magloire <alainm@rcsm.ee.mcgill.ca>
+
+        * run gettextize: added the po directory filled with *.po files.
+
+        * check.sh, scriptgen.awk: fix grep paths.
+
+        * change the directory strucure: grep is now in src to comply with
+        gettext.m4.
+
+        * grep.c version.c [VERSION]: got rid of version.c,
+        it is now define via config.h.
+
+        * dfa.c: patch to speed up initialization.
+        Arnold Robbins (arnold@gnu.ai.mit.edu).
+
+1997-07-09 Alain Magloire <alainm@rcsm.ee.mcgill.ca>
+
+        * *.c [HAVE_CONFIG_H]: Macro defined.
+
+        * support for I18N in Makefile.am and configure.in.
+
+        * update all the string to use gettext(I18N).
+        Help from Franc,ois Pinard previous patch <pinard@IRO.UMontreal.CA>.
+
+1997-07-04 Alain Magloire <alainm@rcsm.ee.mcgill.ca>
+
+        * obstack.[ch]: updated from glibc.
+        Work of Ulrich Drepper <drepper@cygnus.com>.
+
+        * regex.[ch]: updated from glibc.
+        Work of Ulrich Drepper <drepper@cygnus.com>.
+
+        * grep.c: for option -e not counting '\n' for new keys.
+        From Mark Waite <markw@mddmew.fc.hp.com>.
+
+        * grep.c: for option -f allocating the right count.
+        From Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>.
+        Mike Heartel (mike@cs.uoregon.edu).
+
+        * kwset.c (bmexec): Cast tp[-2] to unsigned char before comparing.
+        From Jim Meyering <meyering@asic.sc.ti.com>.
+
+        * grep.1: various typos.
+        From Keith Bostic <bostic@bsdi.com>.
+        Mike Heartel (mike@cs.uoregon.edu).
+
+1997-06-17 Alain Magloire <alainm@rcsm.ee.mcgill.ca>
+
+        * grep.c: support for long options.
+        patch done by Franc,ois Pinard <pinard@IRO.UMontreal.CA>.
+
+        * add getopt1.c in Makefile.am.
+        Noted by Franc,ois Pinard <pinard@IRO.UMontreal.CA>
+
+        * replace getopt.[ch] and add getopt1.c.
+
+        * kwset.c: undef malloc before define it.
+        Franc,ois Pinard <pinard@IRO.UMontreal.CA>.
+
+1997-06-07 Alain Magloire <alainm@rcsm.ee.mcgill.ca>
+
+        * grep.c: format incorrect in
+        fprintf("%s: warning: %s: %s...", filename, strerror(errno)).
+        Mike Heartel (mike@cs.uoregon.edu).
+
+1996-11-19  David J MacKenzie  <djm@catapult.va.pubnix.com>
+
+        * make.com: Set the logical SYS. From rdb@cocamrd.oz.au (Rodney Brown).
+
+        * grep.c (S_ISREG): Define if not defined already, for e.g.
+        SunOS 4.0.3.
+
+        * dfa.c (test_bit, set_bit, clear_bit): Renamed from tstbit,
+        setbit, clrbit to avoid conflict with HP-UX sys/param.h macros.
+
+        * memchr.c: New file, from GNU libc.
+        * grep.c (memchr): Remove definition.
+        * configure.in: Use AC_REPLACE_FUNCS for memchr.
+
+        * configure.in: Remove unused checks for memalign and unsigned char.
+        * grep.c: HAVE_WORKING_MMAP -> HAVE_MMAP.
+
+        * system.h: New file.
+        * dfa.c, kwset.c, grep.c, search.c: Use it instead of duplicating
+        portability boilerplate.
+
+        * grep.c: Include sys/types.h once, instead of three times
+        conditionally.
+        * dfa.c, kwset.c, search.c: Include sys/types.h unconditionally,
+        to always try to get size_t (needed on some old SysV's).
+
+        * dfa.c: Define strchr in terms of index, not the other way around.
+        * search.c: Use memcpy instead of bcopy.
+
+1996-11-15  David J MacKenzie  <djm@catapult.va.pubnix.com>
+
+        * Many files: Update FSF address.
+        Update configuration to use autoconf v2 and automake.
+
+1993-05-22  Mike Haertel  <mike@cs.uoregon.edu>
+
+        * Version 2.0 released.
+
+Copyright (C) 1998-2021 Free Software Foundation, Inc.
+Copying and distribution of this file, with or without modification,
+  are permitted provided the copyright notice and this notice are preserved.
diff --git a/src/grep/GNUmakefile b/src/grep/GNUmakefile
new file mode 100644
index 0000000..0c99d58
--- /dev/null
+++ b/src/grep/GNUmakefile
@@ -0,0 +1,127 @@
+# Having a separate GNUmakefile lets me 'include' the dynamically
+# generated rules created via cfg.mk (package-local configuration)
+# as well as maint.mk (generic maintainer rules).
+# This makefile is used only if you run GNU Make.
+# It is necessary if you want to build targets usually of interest
+# only to the maintainer.
+
+# Copyright (C) 2001, 2003, 2006-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# If the user runs GNU make but has not yet run ./configure,
+# give them a diagnostic.
+_gl-Makefile := $(wildcard [M]akefile)
+ifneq ($(_gl-Makefile),)
+
+# Make tar archive easier to reproduce.
+export TAR_OPTIONS = --owner=0 --group=0 --numeric-owner
+
+# Allow the user to add to this in the Makefile.
+ALL_RECURSIVE_TARGETS =
+
+include Makefile
+
+# Some projects override e.g., _autoreconf here.
+-include $(srcdir)/cfg.mk
+
+# Allow cfg.mk to override these.
+_build-aux ?= build-aux
+_autoreconf ?= autoreconf -v
+
+include $(srcdir)/maint.mk
+
+# Ensure that $(VERSION) is up to date for dist-related targets, but not
+# for others: rerunning autoreconf and recompiling everything isn't cheap.
+_have-git-version-gen := \
+  $(shell test -f $(srcdir)/$(_build-aux)/git-version-gen && echo yes)
+ifeq ($(_have-git-version-gen)0,yes$(MAKELEVEL))
+  _is-dist-target ?= $(filter-out %clean, \
+    $(filter maintainer-% dist% alpha beta stable,$(MAKECMDGOALS)))
+  _is-install-target ?= $(filter-out %check, $(filter install%,$(MAKECMDGOALS)))
+  ifneq (,$(_is-dist-target)$(_is-install-target))
+    _curr-ver := $(shell cd $(srcdir)				\
+                   && $(_build-aux)/git-version-gen		\
+                         .tarball-version			\
+                         $(git-version-gen-tag-sed-script))
+    ifneq ($(_curr-ver),$(VERSION))
+      ifeq ($(_curr-ver),UNKNOWN)
+        $(info WARNING: unable to verify if $(VERSION) is the correct version)
+      else
+        ifneq (,$(_is-install-target))
+          # GNU Coding Standards state that 'make install' should not cause
+          # recompilation after 'make all'.  But as long as changing the version
+          # string alters config.h, the cost of having 'make all' always have an
+          # up-to-date version is prohibitive.  So, as a compromise, we merely
+          # warn when installing a version string that is out of date; the user
+          # should run 'autoreconf' (or something like 'make distcheck') to
+          # fix the version, 'make all' to propagate it, then 'make install'.
+          $(info WARNING: version string $(VERSION) is out of date;)
+          $(info run '$(MAKE) _version' to fix it)
+        else
+          $(info INFO: running autoreconf for new version string: $(_curr-ver))
+GNUmakefile: _version
+	touch GNUmakefile
+        endif
+      endif
+    endif
+  endif
+endif
+
+.PHONY: _version
+_version:
+	cd $(srcdir) && rm -rf autom4te.cache .version && $(_autoreconf)
+	$(MAKE) $(AM_MAKEFLAGS) Makefile
+
+else
+
+.DEFAULT_GOAL := abort-due-to-no-makefile
+srcdir = .
+
+# The package can override .DEFAULT_GOAL to run actions like autoreconf.
+-include ./cfg.mk
+
+# Allow cfg.mk to override these.
+_build-aux ?= build-aux
+_autoreconf ?= autoreconf -v
+
+include ./maint.mk
+
+ifeq ($(.DEFAULT_GOAL),abort-due-to-no-makefile)
+$(MAKECMDGOALS): abort-due-to-no-makefile
+endif
+
+abort-due-to-no-makefile:
+	@echo There seems to be no Makefile in this directory.   1>&2
+	@echo "You must run ./configure before running '$(MAKE)'." 1>&2
+	@exit 1
+
+endif
+
+# Tell version 3.79 and up of GNU make to not build goals in this
+# directory in parallel, in case someone tries to build multiple
+# targets, and one of them can cause a recursive target to be invoked.
+
+# Only set this if Automake doesn't provide it.
+AM_RECURSIVE_TARGETS ?= $(RECURSIVE_TARGETS:-recursive=) \
+  $(RECURSIVE_CLEAN_TARGETS:-recursive=) \
+  dist distcheck tags ctags
+
+ALL_RECURSIVE_TARGETS += $(AM_RECURSIVE_TARGETS)
+
+ifneq ($(word 2, $(MAKECMDGOALS)), )
+ifneq ($(filter $(ALL_RECURSIVE_TARGETS), $(MAKECMDGOALS)), )
+.NOTPARALLEL:
+endif
+endif
diff --git a/src/grep/INSTALL b/src/grep/INSTALL
new file mode 100644
index 0000000..e82fd21
--- /dev/null
+++ b/src/grep/INSTALL
@@ -0,0 +1,368 @@
+Installation Instructions
+*************************
+
+   Copyright (C) 1994-1996, 1999-2002, 2004-2017, 2020-2021 Free
+Software Foundation, Inc.
+
+   Copying and distribution of this file, with or without modification,
+are permitted in any medium without royalty provided the copyright
+notice and this notice are preserved.  This file is offered as-is,
+without warranty of any kind.
+
+Basic Installation
+==================
+
+   Briefly, the shell command './configure && make && make install'
+should configure, build, and install this package.  The following
+more-detailed instructions are generic; see the 'README' file for
+instructions specific to this package.  Some packages provide this
+'INSTALL' file but do not implement all of the features documented
+below.  The lack of an optional feature in a given package is not
+necessarily a bug.  More recommendations for GNU packages can be found
+in *note Makefile Conventions: (standards)Makefile Conventions.
+
+   The 'configure' shell script attempts to guess correct values for
+various system-dependent variables used during compilation.  It uses
+those values to create a 'Makefile' in each directory of the package.
+It may also create one or more '.h' files containing system-dependent
+definitions.  Finally, it creates a shell script 'config.status' that
+you can run in the future to recreate the current configuration, and a
+file 'config.log' containing compiler output (useful mainly for
+debugging 'configure').
+
+   It can also use an optional file (typically called 'config.cache' and
+enabled with '--cache-file=config.cache' or simply '-C') that saves the
+results of its tests to speed up reconfiguring.  Caching is disabled by
+default to prevent problems with accidental use of stale cache files.
+
+   If you need to do unusual things to compile the package, please try
+to figure out how 'configure' could check whether to do them, and mail
+diffs or instructions to the address given in the 'README' so they can
+be considered for the next release.  If you are using the cache, and at
+some point 'config.cache' contains results you don't want to keep, you
+may remove or edit it.
+
+   The file 'configure.ac' (or 'configure.in') is used to create
+'configure' by a program called 'autoconf'.  You need 'configure.ac' if
+you want to change it or regenerate 'configure' using a newer version of
+'autoconf'.
+
+   The simplest way to compile this package is:
+
+  1. 'cd' to the directory containing the package's source code and type
+     './configure' to configure the package for your system.
+
+     Running 'configure' might take a while.  While running, it prints
+     some messages telling which features it is checking for.
+
+  2. Type 'make' to compile the package.
+
+  3. Optionally, type 'make check' to run any self-tests that come with
+     the package, generally using the just-built uninstalled binaries.
+
+  4. Type 'make install' to install the programs and any data files and
+     documentation.  When installing into a prefix owned by root, it is
+     recommended that the package be configured and built as a regular
+     user, and only the 'make install' phase executed with root
+     privileges.
+
+  5. Optionally, type 'make installcheck' to repeat any self-tests, but
+     this time using the binaries in their final installed location.
+     This target does not install anything.  Running this target as a
+     regular user, particularly if the prior 'make install' required
+     root privileges, verifies that the installation completed
+     correctly.
+
+  6. You can remove the program binaries and object files from the
+     source code directory by typing 'make clean'.  To also remove the
+     files that 'configure' created (so you can compile the package for
+     a different kind of computer), type 'make distclean'.  There is
+     also a 'make maintainer-clean' target, but that is intended mainly
+     for the package's developers.  If you use it, you may have to get
+     all sorts of other programs in order to regenerate files that came
+     with the distribution.
+
+  7. Often, you can also type 'make uninstall' to remove the installed
+     files again.  In practice, not all packages have tested that
+     uninstallation works correctly, even though it is required by the
+     GNU Coding Standards.
+
+  8. Some packages, particularly those that use Automake, provide 'make
+     distcheck', which can by used by developers to test that all other
+     targets like 'make install' and 'make uninstall' work correctly.
+     This target is generally not run by end users.
+
+Compilers and Options
+=====================
+
+   Some systems require unusual options for compilation or linking that
+the 'configure' script does not know about.  Run './configure --help'
+for details on some of the pertinent environment variables.
+
+   You can give 'configure' initial values for configuration parameters
+by setting variables in the command line or in the environment.  Here is
+an example:
+
+     ./configure CC=c99 CFLAGS=-g LIBS=-lposix
+
+   *Note Defining Variables::, for more details.
+
+Compiling For Multiple Architectures
+====================================
+
+   You can compile the package for more than one kind of computer at the
+same time, by placing the object files for each architecture in their
+own directory.  To do this, you can use GNU 'make'.  'cd' to the
+directory where you want the object files and executables to go and run
+the 'configure' script.  'configure' automatically checks for the source
+code in the directory that 'configure' is in and in '..'.  This is known
+as a "VPATH" build.
+
+   With a non-GNU 'make', it is safer to compile the package for one
+architecture at a time in the source code directory.  After you have
+installed the package for one architecture, use 'make distclean' before
+reconfiguring for another architecture.
+
+   On MacOS X 10.5 and later systems, you can create libraries and
+executables that work on multiple system types--known as "fat" or
+"universal" binaries--by specifying multiple '-arch' options to the
+compiler but only a single '-arch' option to the preprocessor.  Like
+this:
+
+     ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+                 CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+                 CPP="gcc -E" CXXCPP="g++ -E"
+
+   This is not guaranteed to produce working output in all cases, you
+may have to build one architecture at a time and combine the results
+using the 'lipo' tool if you have problems.
+
+Installation Names
+==================
+
+   By default, 'make install' installs the package's commands under
+'/usr/local/bin', include files under '/usr/local/include', etc.  You
+can specify an installation prefix other than '/usr/local' by giving
+'configure' the option '--prefix=PREFIX', where PREFIX must be an
+absolute file name.
+
+   You can specify separate installation prefixes for
+architecture-specific files and architecture-independent files.  If you
+pass the option '--exec-prefix=PREFIX' to 'configure', the package uses
+PREFIX as the prefix for installing programs and libraries.
+Documentation and other data files still use the regular prefix.
+
+   In addition, if you use an unusual directory layout you can give
+options like '--bindir=DIR' to specify different values for particular
+kinds of files.  Run 'configure --help' for a list of the directories
+you can set and what kinds of files go in them.  In general, the default
+for these options is expressed in terms of '${prefix}', so that
+specifying just '--prefix' will affect all of the other directory
+specifications that were not explicitly provided.
+
+   The most portable way to affect installation locations is to pass the
+correct locations to 'configure'; however, many packages provide one or
+both of the following shortcuts of passing variable assignments to the
+'make install' command line to change installation locations without
+having to reconfigure or recompile.
+
+   The first method involves providing an override variable for each
+affected directory.  For example, 'make install
+prefix=/alternate/directory' will choose an alternate location for all
+directory configuration variables that were expressed in terms of
+'${prefix}'.  Any directories that were specified during 'configure',
+but not in terms of '${prefix}', must each be overridden at install time
+for the entire installation to be relocated.  The approach of makefile
+variable overrides for each directory variable is required by the GNU
+Coding Standards, and ideally causes no recompilation.  However, some
+platforms have known limitations with the semantics of shared libraries
+that end up requiring recompilation when using this method, particularly
+noticeable in packages that use GNU Libtool.
+
+   The second method involves providing the 'DESTDIR' variable.  For
+example, 'make install DESTDIR=/alternate/directory' will prepend
+'/alternate/directory' before all installation names.  The approach of
+'DESTDIR' overrides is not required by the GNU Coding Standards, and
+does not work on platforms that have drive letters.  On the other hand,
+it does better at avoiding recompilation issues, and works well even
+when some directory options were not specified in terms of '${prefix}'
+at 'configure' time.
+
+Optional Features
+=================
+
+   If the package supports it, you can cause programs to be installed
+with an extra prefix or suffix on their names by giving 'configure' the
+option '--program-prefix=PREFIX' or '--program-suffix=SUFFIX'.
+
+   Some packages pay attention to '--enable-FEATURE' options to
+'configure', where FEATURE indicates an optional part of the package.
+They may also pay attention to '--with-PACKAGE' options, where PACKAGE
+is something like 'gnu-as' or 'x' (for the X Window System).  The
+'README' should mention any '--enable-' and '--with-' options that the
+package recognizes.
+
+   For packages that use the X Window System, 'configure' can usually
+find the X include and library files automatically, but if it doesn't,
+you can use the 'configure' options '--x-includes=DIR' and
+'--x-libraries=DIR' to specify their locations.
+
+   Some packages offer the ability to configure how verbose the
+execution of 'make' will be.  For these packages, running './configure
+--enable-silent-rules' sets the default to minimal output, which can be
+overridden with 'make V=1'; while running './configure
+--disable-silent-rules' sets the default to verbose, which can be
+overridden with 'make V=0'.
+
+Particular systems
+==================
+
+   On HP-UX, the default C compiler is not ANSI C compatible.  If GNU CC
+is not installed, it is recommended to use the following options in
+order to use an ANSI C compiler:
+
+     ./configure CC="cc -Ae -D_XOPEN_SOURCE=500"
+
+and if that doesn't work, install pre-built binaries of GCC for HP-UX.
+
+   HP-UX 'make' updates targets which have the same timestamps as their
+prerequisites, which makes it generally unusable when shipped generated
+files such as 'configure' are involved.  Use GNU 'make' instead.
+
+   On OSF/1 a.k.a. Tru64, some versions of the default C compiler cannot
+parse its '<wchar.h>' header file.  The option '-nodtk' can be used as a
+workaround.  If GNU CC is not installed, it is therefore recommended to
+try
+
+     ./configure CC="cc"
+
+and if that doesn't work, try
+
+     ./configure CC="cc -nodtk"
+
+   On Solaris, don't put '/usr/ucb' early in your 'PATH'.  This
+directory contains several dysfunctional programs; working variants of
+these programs are available in '/usr/bin'.  So, if you need '/usr/ucb'
+in your 'PATH', put it _after_ '/usr/bin'.
+
+   On Haiku, software installed for all users goes in '/boot/common',
+not '/usr/local'.  It is recommended to use the following options:
+
+     ./configure --prefix=/boot/common
+
+Specifying the System Type
+==========================
+
+   There may be some features 'configure' cannot figure out
+automatically, but needs to determine by the type of machine the package
+will run on.  Usually, assuming the package is built to be run on the
+_same_ architectures, 'configure' can figure that out, but if it prints
+a message saying it cannot guess the machine type, give it the
+'--build=TYPE' option.  TYPE can either be a short name for the system
+type, such as 'sun4', or a canonical name which has the form:
+
+     CPU-COMPANY-SYSTEM
+
+where SYSTEM can have one of these forms:
+
+     OS
+     KERNEL-OS
+
+   See the file 'config.sub' for the possible values of each field.  If
+'config.sub' isn't included in this package, then this package doesn't
+need to know the machine type.
+
+   If you are _building_ compiler tools for cross-compiling, you should
+use the option '--target=TYPE' to select the type of system they will
+produce code for.
+
+   If you want to _use_ a cross compiler, that generates code for a
+platform different from the build platform, you should specify the
+"host" platform (i.e., that on which the generated programs will
+eventually be run) with '--host=TYPE'.
+
+Sharing Defaults
+================
+
+   If you want to set default values for 'configure' scripts to share,
+you can create a site shell script called 'config.site' that gives
+default values for variables like 'CC', 'cache_file', and 'prefix'.
+'configure' looks for 'PREFIX/share/config.site' if it exists, then
+'PREFIX/etc/config.site' if it exists.  Or, you can set the
+'CONFIG_SITE' environment variable to the location of the site script.
+A warning: not all 'configure' scripts look for a site script.
+
+Defining Variables
+==================
+
+   Variables not defined in a site shell script can be set in the
+environment passed to 'configure'.  However, some packages may run
+configure again during the build, and the customized values of these
+variables may be lost.  In order to avoid this problem, you should set
+them in the 'configure' command line, using 'VAR=value'.  For example:
+
+     ./configure CC=/usr/local2/bin/gcc
+
+causes the specified 'gcc' to be used as the C compiler (unless it is
+overridden in the site shell script).
+
+Unfortunately, this technique does not work for 'CONFIG_SHELL' due to an
+Autoconf limitation.  Until the limitation is lifted, you can use this
+workaround:
+
+     CONFIG_SHELL=/bin/bash ./configure CONFIG_SHELL=/bin/bash
+
+'configure' Invocation
+======================
+
+   'configure' recognizes the following options to control how it
+operates.
+
+'--help'
+'-h'
+     Print a summary of all of the options to 'configure', and exit.
+
+'--help=short'
+'--help=recursive'
+     Print a summary of the options unique to this package's
+     'configure', and exit.  The 'short' variant lists options used only
+     in the top level, while the 'recursive' variant lists options also
+     present in any nested packages.
+
+'--version'
+'-V'
+     Print the version of Autoconf used to generate the 'configure'
+     script, and exit.
+
+'--cache-file=FILE'
+     Enable the cache: use and save the results of the tests in FILE,
+     traditionally 'config.cache'.  FILE defaults to '/dev/null' to
+     disable caching.
+
+'--config-cache'
+'-C'
+     Alias for '--cache-file=config.cache'.
+
+'--quiet'
+'--silent'
+'-q'
+     Do not print messages saying which checks are being made.  To
+     suppress all normal output, redirect it to '/dev/null' (any error
+     messages will still be shown).
+
+'--srcdir=DIR'
+     Look for the package's source code in directory DIR.  Usually
+     'configure' can determine that directory automatically.
+
+'--prefix=DIR'
+     Use DIR as the installation prefix.  *note Installation Names:: for
+     more details, including other options available for fine-tuning the
+     installation locations.
+
+'--no-create'
+'-n'
+     Run the configure checks, but stop before creating any output
+     files.
+
+'configure' also accepts some other, not widely useful, options.  Run
+'configure --help' for more details.
diff --git a/src/grep/Makefile.am b/src/grep/Makefile.am
new file mode 100644
index 0000000..e95ba15
--- /dev/null
+++ b/src/grep/Makefile.am
@@ -0,0 +1,84 @@
+# Process this file with automake to create Makefile.in
+#
+# Copyright 1997-1998, 2005-2021 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+AUTOMAKE_OPTIONS = gnu 1.12
+
+SUBDIRS = po lib doc src tests gnulib-tests
+
+EXTRA_DIST =		\
+  .mailmap		\
+  ChangeLog-2009	\
+  dist-check.mk		\
+  README		\
+  README-alpha		\
+  THANKS.in		\
+  TODO			\
+  cfg.mk		\
+  thanks-gen
+
+# Shortcut targets to make it easier to run expensive tests.
+.PHONY: check-expensive
+check-expensive:
+	$(MAKE) check RUN_EXPENSIVE_TESTS=yes
+.PHONY: check-very-expensive
+check-very-expensive: check-expensive
+
+# Run syntax-check rules before creating a distribution tarball.
+.PHONY: run-syntax-check
+run-syntax-check: all
+	$(AM_V_GEN)test ! -d .git || $(MAKE) syntax-check
+
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+        dir0=`echo "$$dir0" | sed -e "$$sed_butlast"`; \
+      else \
+        first2=`echo "$$dir2" | sed -e "$$sed_first"`; \
+        if test "$$first2" = "$$first"; then \
+          dir2=`echo "$$dir2" | sed -e "$$sed_rest"`; \
+        else \
+          dir2="../$$dir2"; \
+        fi; \
+        dir0="$$dir0"/"$$first"; \
+      fi; \
+    fi; \
+    dir1=`echo "$$dir1" | sed -e "$$sed_rest"`; \
+  done; \
+  reldir="$$dir2"
+DIST_ARCHIVES = $(distdir).tar.gz $(distdir).tar.xz
+GZIP_ENV = --best
+DIST_TARGETS = dist-xz dist-gzip
+# Exists only to be overridden by the user if desired.
+AM_DISTCHECK_DVI_TARGET = dvi
+distuninstallcheck_listfiles = find . -type f -print
+am__distuninstallcheck_listfiles = $(distuninstallcheck_listfiles) \
+  | sed 's|^\./|$(prefix)/|' | grep -v '$(infodir)/dir$$'
+distcleancheck_listfiles = find . -type f -print
+pkglibexecdir = @pkglibexecdir@
+ACLOCAL = @ACLOCAL@
+ALLOCA = @ALLOCA@
+ALLOCA_H = @ALLOCA_H@
+AMTAR = @AMTAR@
+AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
+APPLE_UNIVERSAL_BUILD = @APPLE_UNIVERSAL_BUILD@
+AR = @AR@
+ARFLAGS = @ARFLAGS@
+AUTOCONF = @AUTOCONF@
+AUTOHEADER = @AUTOHEADER@
+AUTOMAKE = @AUTOMAKE@
+AWK = @AWK@
+BITSIZEOF_PTRDIFF_T = @BITSIZEOF_PTRDIFF_T@
+BITSIZEOF_SIG_ATOMIC_T = @BITSIZEOF_SIG_ATOMIC_T@
+BITSIZEOF_SIZE_T = @BITSIZEOF_SIZE_T@
+BITSIZEOF_WCHAR_T = @BITSIZEOF_WCHAR_T@
+BITSIZEOF_WINT_T = @BITSIZEOF_WINT_T@
+CC = @CC@
+CCDEPMODE = @CCDEPMODE@
+CFLAGS = @CFLAGS@
+CFLAG_VISIBILITY = @CFLAG_VISIBILITY@
+COLORIZE_SOURCE = @COLORIZE_SOURCE@
+CONFIG_INCLUDE = @CONFIG_INCLUDE@
+CPP = @CPP@
+CPPFLAGS = @CPPFLAGS@
+CSCOPE = @CSCOPE@
+CTAGS = @CTAGS@
+CYGPATH_W = @CYGPATH_W@
+DEFS = @DEFS@
+DEPDIR = @DEPDIR@
+ECHO_C = @ECHO_C@
+ECHO_N = @ECHO_N@
+ECHO_T = @ECHO_T@
+EGREP = @EGREP@
+EMULTIHOP_HIDDEN = @EMULTIHOP_HIDDEN@
+EMULTIHOP_VALUE = @EMULTIHOP_VALUE@
+ENOLINK_HIDDEN = @ENOLINK_HIDDEN@
+ENOLINK_VALUE = @ENOLINK_VALUE@
+EOVERFLOW_HIDDEN = @EOVERFLOW_HIDDEN@
+EOVERFLOW_VALUE = @EOVERFLOW_VALUE@
+ERRNO_H = @ERRNO_H@
+ETAGS = @ETAGS@
+EXEEXT = @EXEEXT@
+FLOAT_H = @FLOAT_H@
+FNMATCH_H = @FNMATCH_H@
+GETOPT_CDEFS_H = @GETOPT_CDEFS_H@
+GETOPT_H = @GETOPT_H@
+GETTEXT_MACRO_VERSION = @GETTEXT_MACRO_VERSION@
+GL_CFLAG_ALLOW_WARNINGS = @GL_CFLAG_ALLOW_WARNINGS@
+GL_CXXFLAG_ALLOW_WARNINGS = @GL_CXXFLAG_ALLOW_WARNINGS@
+GL_GNULIB_ACCEPT = @GL_GNULIB_ACCEPT@
+GL_GNULIB_ACCEPT4 = @GL_GNULIB_ACCEPT4@
+GL_GNULIB_ACCESS = @GL_GNULIB_ACCESS@
+GL_GNULIB_ALIGNED_ALLOC = @GL_GNULIB_ALIGNED_ALLOC@
+GL_GNULIB_ALPHASORT = @GL_GNULIB_ALPHASORT@
+GL_GNULIB_ATOLL = @GL_GNULIB_ATOLL@
+GL_GNULIB_BIND = @GL_GNULIB_BIND@
+GL_GNULIB_BTOWC = @GL_GNULIB_BTOWC@
+GL_GNULIB_CALLOC_POSIX = @GL_GNULIB_CALLOC_POSIX@
+GL_GNULIB_CANONICALIZE_FILE_NAME = @GL_GNULIB_CANONICALIZE_FILE_NAME@
+GL_GNULIB_CHDIR = @GL_GNULIB_CHDIR@
+GL_GNULIB_CHOWN = @GL_GNULIB_CHOWN@
+GL_GNULIB_CLOSE = @GL_GNULIB_CLOSE@
+GL_GNULIB_CLOSEDIR = @GL_GNULIB_CLOSEDIR@
+GL_GNULIB_CONNECT = @GL_GNULIB_CONNECT@
+GL_GNULIB_COPY_FILE_RANGE = @GL_GNULIB_COPY_FILE_RANGE@
+GL_GNULIB_CREAT = @GL_GNULIB_CREAT@
+GL_GNULIB_CTIME = @GL_GNULIB_CTIME@
+GL_GNULIB_DIRFD = @GL_GNULIB_DIRFD@
+GL_GNULIB_DPRINTF = @GL_GNULIB_DPRINTF@
+GL_GNULIB_DUP = @GL_GNULIB_DUP@
+GL_GNULIB_DUP2 = @GL_GNULIB_DUP2@
+GL_GNULIB_DUP3 = @GL_GNULIB_DUP3@
+GL_GNULIB_DUPLOCALE = @GL_GNULIB_DUPLOCALE@
+GL_GNULIB_ENVIRON = @GL_GNULIB_ENVIRON@
+GL_GNULIB_EUIDACCESS = @GL_GNULIB_EUIDACCESS@
+GL_GNULIB_EXECL = @GL_GNULIB_EXECL@
+GL_GNULIB_EXECLE = @GL_GNULIB_EXECLE@
+GL_GNULIB_EXECLP = @GL_GNULIB_EXECLP@
+GL_GNULIB_EXECV = @GL_GNULIB_EXECV@
+GL_GNULIB_EXECVE = @GL_GNULIB_EXECVE@
+GL_GNULIB_EXECVP = @GL_GNULIB_EXECVP@
+GL_GNULIB_EXECVPE = @GL_GNULIB_EXECVPE@
+GL_GNULIB_EXPLICIT_BZERO = @GL_GNULIB_EXPLICIT_BZERO@
+GL_GNULIB_FACCESSAT = @GL_GNULIB_FACCESSAT@
+GL_GNULIB_FCHDIR = @GL_GNULIB_FCHDIR@
+GL_GNULIB_FCHMODAT = @GL_GNULIB_FCHMODAT@
+GL_GNULIB_FCHOWNAT = @GL_GNULIB_FCHOWNAT@
+GL_GNULIB_FCLOSE = @GL_GNULIB_FCLOSE@
+GL_GNULIB_FCNTL = @GL_GNULIB_FCNTL@
+GL_GNULIB_FDATASYNC = @GL_GNULIB_FDATASYNC@
+GL_GNULIB_FDOPEN = @GL_GNULIB_FDOPEN@
+GL_GNULIB_FDOPENDIR = @GL_GNULIB_FDOPENDIR@
+GL_GNULIB_FFLUSH = @GL_GNULIB_FFLUSH@
+GL_GNULIB_FFSL = @GL_GNULIB_FFSL@
+GL_GNULIB_FFSLL = @GL_GNULIB_FFSLL@
+GL_GNULIB_FGETC = @GL_GNULIB_FGETC@
+GL_GNULIB_FGETS = @GL_GNULIB_FGETS@
+GL_GNULIB_FNMATCH = @GL_GNULIB_FNMATCH@
+GL_GNULIB_FOPEN = @GL_GNULIB_FOPEN@
+GL_GNULIB_FPRINTF = @GL_GNULIB_FPRINTF@
+GL_GNULIB_FPRINTF_POSIX = @GL_GNULIB_FPRINTF_POSIX@
+GL_GNULIB_FPURGE = @GL_GNULIB_FPURGE@
+GL_GNULIB_FPUTC = @GL_GNULIB_FPUTC@
+GL_GNULIB_FPUTS = @GL_GNULIB_FPUTS@
+GL_GNULIB_FREAD = @GL_GNULIB_FREAD@
+GL_GNULIB_FREE_POSIX = @GL_GNULIB_FREE_POSIX@
+GL_GNULIB_FREOPEN = @GL_GNULIB_FREOPEN@
+GL_GNULIB_FSCANF = @GL_GNULIB_FSCANF@
+GL_GNULIB_FSEEK = @GL_GNULIB_FSEEK@
+GL_GNULIB_FSEEKO = @GL_GNULIB_FSEEKO@
+GL_GNULIB_FSTAT = @GL_GNULIB_FSTAT@
+GL_GNULIB_FSTATAT = @GL_GNULIB_FSTATAT@
+GL_GNULIB_FSYNC = @GL_GNULIB_FSYNC@
+GL_GNULIB_FTELL = @GL_GNULIB_FTELL@
+GL_GNULIB_FTELLO = @GL_GNULIB_FTELLO@
+GL_GNULIB_FTRUNCATE = @GL_GNULIB_FTRUNCATE@
+GL_GNULIB_FUTIMENS = @GL_GNULIB_FUTIMENS@
+GL_GNULIB_FWRITE = @GL_GNULIB_FWRITE@
+GL_GNULIB_GETC = @GL_GNULIB_GETC@
+GL_GNULIB_GETCHAR = @GL_GNULIB_GETCHAR@
+GL_GNULIB_GETCWD = @GL_GNULIB_GETCWD@
+GL_GNULIB_GETDELIM = @GL_GNULIB_GETDELIM@
+GL_GNULIB_GETDOMAINNAME = @GL_GNULIB_GETDOMAINNAME@
+GL_GNULIB_GETDTABLESIZE = @GL_GNULIB_GETDTABLESIZE@
+GL_GNULIB_GETENTROPY = @GL_GNULIB_GETENTROPY@
+GL_GNULIB_GETGROUPS = @GL_GNULIB_GETGROUPS@
+GL_GNULIB_GETHOSTNAME = @GL_GNULIB_GETHOSTNAME@
+GL_GNULIB_GETLINE = @GL_GNULIB_GETLINE@
+GL_GNULIB_GETLOADAVG = @GL_GNULIB_GETLOADAVG@
+GL_GNULIB_GETLOGIN = @GL_GNULIB_GETLOGIN@
+GL_GNULIB_GETLOGIN_R = @GL_GNULIB_GETLOGIN_R@
+GL_GNULIB_GETOPT_POSIX = @GL_GNULIB_GETOPT_POSIX@
+GL_GNULIB_GETPAGESIZE = @GL_GNULIB_GETPAGESIZE@
+GL_GNULIB_GETPASS = @GL_GNULIB_GETPASS@
+GL_GNULIB_GETPEERNAME = @GL_GNULIB_GETPEERNAME@
+GL_GNULIB_GETSOCKNAME = @GL_GNULIB_GETSOCKNAME@
+GL_GNULIB_GETSOCKOPT = @GL_GNULIB_GETSOCKOPT@
+GL_GNULIB_GETSUBOPT = @GL_GNULIB_GETSUBOPT@
+GL_GNULIB_GETTIMEOFDAY = @GL_GNULIB_GETTIMEOFDAY@
+GL_GNULIB_GETUMASK = @GL_GNULIB_GETUMASK@
+GL_GNULIB_GETUSERSHELL = @GL_GNULIB_GETUSERSHELL@
+GL_GNULIB_GRANTPT = @GL_GNULIB_GRANTPT@
+GL_GNULIB_GROUP_MEMBER = @GL_GNULIB_GROUP_MEMBER@
+GL_GNULIB_ICONV = @GL_GNULIB_ICONV@
+GL_GNULIB_IMAXABS = @GL_GNULIB_IMAXABS@
+GL_GNULIB_IMAXDIV = @GL_GNULIB_IMAXDIV@
+GL_GNULIB_INET_NTOP = @GL_GNULIB_INET_NTOP@
+GL_GNULIB_INET_PTON = @GL_GNULIB_INET_PTON@
+GL_GNULIB_IOCTL = @GL_GNULIB_IOCTL@
+GL_GNULIB_ISATTY = @GL_GNULIB_ISATTY@
+GL_GNULIB_ISBLANK = @GL_GNULIB_ISBLANK@
+GL_GNULIB_ISWBLANK = @GL_GNULIB_ISWBLANK@
+GL_GNULIB_ISWCTYPE = @GL_GNULIB_ISWCTYPE@
+GL_GNULIB_ISWDIGIT = @GL_GNULIB_ISWDIGIT@
+GL_GNULIB_ISWXDIGIT = @GL_GNULIB_ISWXDIGIT@
+GL_GNULIB_LCHMOD = @GL_GNULIB_LCHMOD@
+GL_GNULIB_LCHOWN = @GL_GNULIB_LCHOWN@
+GL_GNULIB_LINK = @GL_GNULIB_LINK@
+GL_GNULIB_LINKAT = @GL_GNULIB_LINKAT@
+GL_GNULIB_LISTEN = @GL_GNULIB_LISTEN@
+GL_GNULIB_LOCALECONV = @GL_GNULIB_LOCALECONV@
+GL_GNULIB_LOCALENAME = @GL_GNULIB_LOCALENAME@
+GL_GNULIB_LOCALTIME = @GL_GNULIB_LOCALTIME@
+GL_GNULIB_LSEEK = @GL_GNULIB_LSEEK@
+GL_GNULIB_LSTAT = @GL_GNULIB_LSTAT@
+GL_GNULIB_MALLOC_POSIX = @GL_GNULIB_MALLOC_POSIX@
+GL_GNULIB_MBRLEN = @GL_GNULIB_MBRLEN@
+GL_GNULIB_MBRTOWC = @GL_GNULIB_MBRTOWC@
+GL_GNULIB_MBSCASECMP = @GL_GNULIB_MBSCASECMP@
+GL_GNULIB_MBSCASESTR = @GL_GNULIB_MBSCASESTR@
+GL_GNULIB_MBSCHR = @GL_GNULIB_MBSCHR@
+GL_GNULIB_MBSCSPN = @GL_GNULIB_MBSCSPN@
+GL_GNULIB_MBSINIT = @GL_GNULIB_MBSINIT@
+GL_GNULIB_MBSLEN = @GL_GNULIB_MBSLEN@
+GL_GNULIB_MBSNCASECMP = @GL_GNULIB_MBSNCASECMP@
+GL_GNULIB_MBSNLEN = @GL_GNULIB_MBSNLEN@
+GL_GNULIB_MBSNRTOWCS = @GL_GNULIB_MBSNRTOWCS@
+GL_GNULIB_MBSPBRK = @GL_GNULIB_MBSPBRK@
+GL_GNULIB_MBSPCASECMP = @GL_GNULIB_MBSPCASECMP@
+GL_GNULIB_MBSRCHR = @GL_GNULIB_MBSRCHR@
+GL_GNULIB_MBSRTOWCS = @GL_GNULIB_MBSRTOWCS@
+GL_GNULIB_MBSSEP = @GL_GNULIB_MBSSEP@
+GL_GNULIB_MBSSPN = @GL_GNULIB_MBSSPN@
+GL_GNULIB_MBSSTR = @GL_GNULIB_MBSSTR@
+GL_GNULIB_MBSTOK_R = @GL_GNULIB_MBSTOK_R@
+GL_GNULIB_MBTOWC = @GL_GNULIB_MBTOWC@
+GL_GNULIB_MDA_ACCESS = @GL_GNULIB_MDA_ACCESS@
+GL_GNULIB_MDA_CHDIR = @GL_GNULIB_MDA_CHDIR@
+GL_GNULIB_MDA_CHMOD = @GL_GNULIB_MDA_CHMOD@
+GL_GNULIB_MDA_CLOSE = @GL_GNULIB_MDA_CLOSE@
+GL_GNULIB_MDA_CREAT = @GL_GNULIB_MDA_CREAT@
+GL_GNULIB_MDA_DUP = @GL_GNULIB_MDA_DUP@
+GL_GNULIB_MDA_DUP2 = @GL_GNULIB_MDA_DUP2@
+GL_GNULIB_MDA_ECVT = @GL_GNULIB_MDA_ECVT@
+GL_GNULIB_MDA_EXECL = @GL_GNULIB_MDA_EXECL@
+GL_GNULIB_MDA_EXECLE = @GL_GNULIB_MDA_EXECLE@
+GL_GNULIB_MDA_EXECLP = @GL_GNULIB_MDA_EXECLP@
+GL_GNULIB_MDA_EXECV = @GL_GNULIB_MDA_EXECV@
+GL_GNULIB_MDA_EXECVE = @GL_GNULIB_MDA_EXECVE@
+GL_GNULIB_MDA_EXECVP = @GL_GNULIB_MDA_EXECVP@
+GL_GNULIB_MDA_EXECVPE = @GL_GNULIB_MDA_EXECVPE@
+GL_GNULIB_MDA_FCLOSEALL = @GL_GNULIB_MDA_FCLOSEALL@
+GL_GNULIB_MDA_FCVT = @GL_GNULIB_MDA_FCVT@
+GL_GNULIB_MDA_FDOPEN = @GL_GNULIB_MDA_FDOPEN@
+GL_GNULIB_MDA_FILENO = @GL_GNULIB_MDA_FILENO@
+GL_GNULIB_MDA_GCVT = @GL_GNULIB_MDA_GCVT@
+GL_GNULIB_MDA_GETCWD = @GL_GNULIB_MDA_GETCWD@
+GL_GNULIB_MDA_GETPID = @GL_GNULIB_MDA_GETPID@
+GL_GNULIB_MDA_GETW = @GL_GNULIB_MDA_GETW@
+GL_GNULIB_MDA_ISATTY = @GL_GNULIB_MDA_ISATTY@
+GL_GNULIB_MDA_LSEEK = @GL_GNULIB_MDA_LSEEK@
+GL_GNULIB_MDA_MEMCCPY = @GL_GNULIB_MDA_MEMCCPY@
+GL_GNULIB_MDA_MKDIR = @GL_GNULIB_MDA_MKDIR@
+GL_GNULIB_MDA_MKTEMP = @GL_GNULIB_MDA_MKTEMP@
+GL_GNULIB_MDA_OPEN = @GL_GNULIB_MDA_OPEN@
+GL_GNULIB_MDA_PUTENV = @GL_GNULIB_MDA_PUTENV@
+GL_GNULIB_MDA_PUTW = @GL_GNULIB_MDA_PUTW@
+GL_GNULIB_MDA_READ = @GL_GNULIB_MDA_READ@
+GL_GNULIB_MDA_RMDIR = @GL_GNULIB_MDA_RMDIR@
+GL_GNULIB_MDA_STRDUP = @GL_GNULIB_MDA_STRDUP@
+GL_GNULIB_MDA_SWAB = @GL_GNULIB_MDA_SWAB@
+GL_GNULIB_MDA_TEMPNAM = @GL_GNULIB_MDA_TEMPNAM@
+GL_GNULIB_MDA_TZSET = @GL_GNULIB_MDA_TZSET@
+GL_GNULIB_MDA_UMASK = @GL_GNULIB_MDA_UMASK@
+GL_GNULIB_MDA_UNLINK = @GL_GNULIB_MDA_UNLINK@
+GL_GNULIB_MDA_WCSDUP = @GL_GNULIB_MDA_WCSDUP@
+GL_GNULIB_MDA_WRITE = @GL_GNULIB_MDA_WRITE@
+GL_GNULIB_MEMCHR = @GL_GNULIB_MEMCHR@
+GL_GNULIB_MEMMEM = @GL_GNULIB_MEMMEM@
+GL_GNULIB_MEMPCPY = @GL_GNULIB_MEMPCPY@
+GL_GNULIB_MEMRCHR = @GL_GNULIB_MEMRCHR@
+GL_GNULIB_MKDIR = @GL_GNULIB_MKDIR@
+GL_GNULIB_MKDIRAT = @GL_GNULIB_MKDIRAT@
+GL_GNULIB_MKDTEMP = @GL_GNULIB_MKDTEMP@
+GL_GNULIB_MKFIFO = @GL_GNULIB_MKFIFO@
+GL_GNULIB_MKFIFOAT = @GL_GNULIB_MKFIFOAT@
+GL_GNULIB_MKNOD = @GL_GNULIB_MKNOD@
+GL_GNULIB_MKNODAT = @GL_GNULIB_MKNODAT@
+GL_GNULIB_MKOSTEMP = @GL_GNULIB_MKOSTEMP@
+GL_GNULIB_MKOSTEMPS = @GL_GNULIB_MKOSTEMPS@
+GL_GNULIB_MKSTEMP = @GL_GNULIB_MKSTEMP@
+GL_GNULIB_MKSTEMPS = @GL_GNULIB_MKSTEMPS@
+GL_GNULIB_MKTIME = @GL_GNULIB_MKTIME@
+GL_GNULIB_NANOSLEEP = @GL_GNULIB_NANOSLEEP@
+GL_GNULIB_NL_LANGINFO = @GL_GNULIB_NL_LANGINFO@
+GL_GNULIB_NONBLOCKING = @GL_GNULIB_NONBLOCKING@
+GL_GNULIB_OBSTACK_PRINTF = @GL_GNULIB_OBSTACK_PRINTF@
+GL_GNULIB_OBSTACK_PRINTF_POSIX = @GL_GNULIB_OBSTACK_PRINTF_POSIX@
+GL_GNULIB_OPEN = @GL_GNULIB_OPEN@
+GL_GNULIB_OPENAT = @GL_GNULIB_OPENAT@
+GL_GNULIB_OPENDIR = @GL_GNULIB_OPENDIR@
+GL_GNULIB_OVERRIDES_STRUCT_STAT = @GL_GNULIB_OVERRIDES_STRUCT_STAT@
+GL_GNULIB_PCLOSE = @GL_GNULIB_PCLOSE@
+GL_GNULIB_PERROR = @GL_GNULIB_PERROR@
+GL_GNULIB_PIPE = @GL_GNULIB_PIPE@
+GL_GNULIB_PIPE2 = @GL_GNULIB_PIPE2@
+GL_GNULIB_POPEN = @GL_GNULIB_POPEN@
+GL_GNULIB_POSIX_MEMALIGN = @GL_GNULIB_POSIX_MEMALIGN@
+GL_GNULIB_POSIX_OPENPT = @GL_GNULIB_POSIX_OPENPT@
+GL_GNULIB_PREAD = @GL_GNULIB_PREAD@
+GL_GNULIB_PRINTF = @GL_GNULIB_PRINTF@
+GL_GNULIB_PRINTF_POSIX = @GL_GNULIB_PRINTF_POSIX@
+GL_GNULIB_PSELECT = @GL_GNULIB_PSELECT@
+GL_GNULIB_PTHREAD_COND = @GL_GNULIB_PTHREAD_COND@
+GL_GNULIB_PTHREAD_MUTEX = @GL_GNULIB_PTHREAD_MUTEX@
+GL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK = @GL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK@
+GL_GNULIB_PTHREAD_ONCE = @GL_GNULIB_PTHREAD_ONCE@
+GL_GNULIB_PTHREAD_RWLOCK = @GL_GNULIB_PTHREAD_RWLOCK@
+GL_GNULIB_PTHREAD_SIGMASK = @GL_GNULIB_PTHREAD_SIGMASK@
+GL_GNULIB_PTHREAD_SPIN = @GL_GNULIB_PTHREAD_SPIN@
+GL_GNULIB_PTHREAD_THREAD = @GL_GNULIB_PTHREAD_THREAD@
+GL_GNULIB_PTHREAD_TSS = @GL_GNULIB_PTHREAD_TSS@
+GL_GNULIB_PTSNAME = @GL_GNULIB_PTSNAME@
+GL_GNULIB_PTSNAME_R = @GL_GNULIB_PTSNAME_R@
+GL_GNULIB_PUTC = @GL_GNULIB_PUTC@
+GL_GNULIB_PUTCHAR = @GL_GNULIB_PUTCHAR@
+GL_GNULIB_PUTENV = @GL_GNULIB_PUTENV@
+GL_GNULIB_PUTS = @GL_GNULIB_PUTS@
+GL_GNULIB_PWRITE = @GL_GNULIB_PWRITE@
+GL_GNULIB_QSORT_R = @GL_GNULIB_QSORT_R@
+GL_GNULIB_RAISE = @GL_GNULIB_RAISE@
+GL_GNULIB_RANDOM = @GL_GNULIB_RANDOM@
+GL_GNULIB_RANDOM_R = @GL_GNULIB_RANDOM_R@
+GL_GNULIB_RAWMEMCHR = @GL_GNULIB_RAWMEMCHR@
+GL_GNULIB_READ = @GL_GNULIB_READ@
+GL_GNULIB_READDIR = @GL_GNULIB_READDIR@
+GL_GNULIB_READLINK = @GL_GNULIB_READLINK@
+GL_GNULIB_READLINKAT = @GL_GNULIB_READLINKAT@
+GL_GNULIB_REALLOCARRAY = @GL_GNULIB_REALLOCARRAY@
+GL_GNULIB_REALLOC_POSIX = @GL_GNULIB_REALLOC_POSIX@
+GL_GNULIB_REALPATH = @GL_GNULIB_REALPATH@
+GL_GNULIB_RECV = @GL_GNULIB_RECV@
+GL_GNULIB_RECVFROM = @GL_GNULIB_RECVFROM@
+GL_GNULIB_REMOVE = @GL_GNULIB_REMOVE@
+GL_GNULIB_RENAME = @GL_GNULIB_RENAME@
+GL_GNULIB_RENAMEAT = @GL_GNULIB_RENAMEAT@
+GL_GNULIB_REWINDDIR = @GL_GNULIB_REWINDDIR@
+GL_GNULIB_RMDIR = @GL_GNULIB_RMDIR@
+GL_GNULIB_RPMATCH = @GL_GNULIB_RPMATCH@
+GL_GNULIB_SCANDIR = @GL_GNULIB_SCANDIR@
+GL_GNULIB_SCANF = @GL_GNULIB_SCANF@
+GL_GNULIB_SCHED_YIELD = @GL_GNULIB_SCHED_YIELD@
+GL_GNULIB_SECURE_GETENV = @GL_GNULIB_SECURE_GETENV@
+GL_GNULIB_SELECT = @GL_GNULIB_SELECT@
+GL_GNULIB_SEND = @GL_GNULIB_SEND@
+GL_GNULIB_SENDTO = @GL_GNULIB_SENDTO@
+GL_GNULIB_SETENV = @GL_GNULIB_SETENV@
+GL_GNULIB_SETHOSTNAME = @GL_GNULIB_SETHOSTNAME@
+GL_GNULIB_SETLOCALE = @GL_GNULIB_SETLOCALE@
+GL_GNULIB_SETLOCALE_NULL = @GL_GNULIB_SETLOCALE_NULL@
+GL_GNULIB_SETSOCKOPT = @GL_GNULIB_SETSOCKOPT@
+GL_GNULIB_SHUTDOWN = @GL_GNULIB_SHUTDOWN@
+GL_GNULIB_SIGABBREV_NP = @GL_GNULIB_SIGABBREV_NP@
+GL_GNULIB_SIGACTION = @GL_GNULIB_SIGACTION@
+GL_GNULIB_SIGDESCR_NP = @GL_GNULIB_SIGDESCR_NP@
+GL_GNULIB_SIGNAL_H_SIGPIPE = @GL_GNULIB_SIGNAL_H_SIGPIPE@
+GL_GNULIB_SIGPROCMASK = @GL_GNULIB_SIGPROCMASK@
+GL_GNULIB_SLEEP = @GL_GNULIB_SLEEP@
+GL_GNULIB_SNPRINTF = @GL_GNULIB_SNPRINTF@
+GL_GNULIB_SOCKET = @GL_GNULIB_SOCKET@
+GL_GNULIB_SPRINTF_POSIX = @GL_GNULIB_SPRINTF_POSIX@
+GL_GNULIB_STAT = @GL_GNULIB_STAT@
+GL_GNULIB_STDIO_H_NONBLOCKING = @GL_GNULIB_STDIO_H_NONBLOCKING@
+GL_GNULIB_STDIO_H_SIGPIPE = @GL_GNULIB_STDIO_H_SIGPIPE@
+GL_GNULIB_STPCPY = @GL_GNULIB_STPCPY@
+GL_GNULIB_STPNCPY = @GL_GNULIB_STPNCPY@
+GL_GNULIB_STRCASESTR = @GL_GNULIB_STRCASESTR@
+GL_GNULIB_STRCHRNUL = @GL_GNULIB_STRCHRNUL@
+GL_GNULIB_STRDUP = @GL_GNULIB_STRDUP@
+GL_GNULIB_STRERROR = @GL_GNULIB_STRERROR@
+GL_GNULIB_STRERRORNAME_NP = @GL_GNULIB_STRERRORNAME_NP@
+GL_GNULIB_STRERROR_R = @GL_GNULIB_STRERROR_R@
+GL_GNULIB_STRFTIME = @GL_GNULIB_STRFTIME@
+GL_GNULIB_STRNCAT = @GL_GNULIB_STRNCAT@
+GL_GNULIB_STRNDUP = @GL_GNULIB_STRNDUP@
+GL_GNULIB_STRNLEN = @GL_GNULIB_STRNLEN@
+GL_GNULIB_STRPBRK = @GL_GNULIB_STRPBRK@
+GL_GNULIB_STRPTIME = @GL_GNULIB_STRPTIME@
+GL_GNULIB_STRSEP = @GL_GNULIB_STRSEP@
+GL_GNULIB_STRSIGNAL = @GL_GNULIB_STRSIGNAL@
+GL_GNULIB_STRSTR = @GL_GNULIB_STRSTR@
+GL_GNULIB_STRTOD = @GL_GNULIB_STRTOD@
+GL_GNULIB_STRTOIMAX = @GL_GNULIB_STRTOIMAX@
+GL_GNULIB_STRTOK_R = @GL_GNULIB_STRTOK_R@
+GL_GNULIB_STRTOL = @GL_GNULIB_STRTOL@
+GL_GNULIB_STRTOLD = @GL_GNULIB_STRTOLD@
+GL_GNULIB_STRTOLL = @GL_GNULIB_STRTOLL@
+GL_GNULIB_STRTOUL = @GL_GNULIB_STRTOUL@
+GL_GNULIB_STRTOULL = @GL_GNULIB_STRTOULL@
+GL_GNULIB_STRTOUMAX = @GL_GNULIB_STRTOUMAX@
+GL_GNULIB_STRVERSCMP = @GL_GNULIB_STRVERSCMP@
+GL_GNULIB_SYMLINK = @GL_GNULIB_SYMLINK@
+GL_GNULIB_SYMLINKAT = @GL_GNULIB_SYMLINKAT@
+GL_GNULIB_SYSTEM_POSIX = @GL_GNULIB_SYSTEM_POSIX@
+GL_GNULIB_TIMEGM = @GL_GNULIB_TIMEGM@
+GL_GNULIB_TIMESPEC_GET = @GL_GNULIB_TIMESPEC_GET@
+GL_GNULIB_TIME_R = @GL_GNULIB_TIME_R@
+GL_GNULIB_TIME_RZ = @GL_GNULIB_TIME_RZ@
+GL_GNULIB_TMPFILE = @GL_GNULIB_TMPFILE@
+GL_GNULIB_TOWCTRANS = @GL_GNULIB_TOWCTRANS@
+GL_GNULIB_TRUNCATE = @GL_GNULIB_TRUNCATE@
+GL_GNULIB_TTYNAME_R = @GL_GNULIB_TTYNAME_R@
+GL_GNULIB_TZSET = @GL_GNULIB_TZSET@
+GL_GNULIB_UNISTD_H_GETOPT = @GL_GNULIB_UNISTD_H_GETOPT@
+GL_GNULIB_UNISTD_H_NONBLOCKING = @GL_GNULIB_UNISTD_H_NONBLOCKING@
+GL_GNULIB_UNISTD_H_SIGPIPE = @GL_GNULIB_UNISTD_H_SIGPIPE@
+GL_GNULIB_UNLINK = @GL_GNULIB_UNLINK@
+GL_GNULIB_UNLINKAT = @GL_GNULIB_UNLINKAT@
+GL_GNULIB_UNLOCKPT = @GL_GNULIB_UNLOCKPT@
+GL_GNULIB_UNSETENV = @GL_GNULIB_UNSETENV@
+GL_GNULIB_USLEEP = @GL_GNULIB_USLEEP@
+GL_GNULIB_UTIMENSAT = @GL_GNULIB_UTIMENSAT@
+GL_GNULIB_VASPRINTF = @GL_GNULIB_VASPRINTF@
+GL_GNULIB_VDPRINTF = @GL_GNULIB_VDPRINTF@
+GL_GNULIB_VFPRINTF = @GL_GNULIB_VFPRINTF@
+GL_GNULIB_VFPRINTF_POSIX = @GL_GNULIB_VFPRINTF_POSIX@
+GL_GNULIB_VFSCANF = @GL_GNULIB_VFSCANF@
+GL_GNULIB_VPRINTF = @GL_GNULIB_VPRINTF@
+GL_GNULIB_VPRINTF_POSIX = @GL_GNULIB_VPRINTF_POSIX@
+GL_GNULIB_VSCANF = @GL_GNULIB_VSCANF@
+GL_GNULIB_VSNPRINTF = @GL_GNULIB_VSNPRINTF@
+GL_GNULIB_VSPRINTF_POSIX = @GL_GNULIB_VSPRINTF_POSIX@
+GL_GNULIB_WCPCPY = @GL_GNULIB_WCPCPY@
+GL_GNULIB_WCPNCPY = @GL_GNULIB_WCPNCPY@
+GL_GNULIB_WCRTOMB = @GL_GNULIB_WCRTOMB@
+GL_GNULIB_WCSCASECMP = @GL_GNULIB_WCSCASECMP@
+GL_GNULIB_WCSCAT = @GL_GNULIB_WCSCAT@
+GL_GNULIB_WCSCHR = @GL_GNULIB_WCSCHR@
+GL_GNULIB_WCSCMP = @GL_GNULIB_WCSCMP@
+GL_GNULIB_WCSCOLL = @GL_GNULIB_WCSCOLL@
+GL_GNULIB_WCSCPY = @GL_GNULIB_WCSCPY@
+GL_GNULIB_WCSCSPN = @GL_GNULIB_WCSCSPN@
+GL_GNULIB_WCSDUP = @GL_GNULIB_WCSDUP@
+GL_GNULIB_WCSFTIME = @GL_GNULIB_WCSFTIME@
+GL_GNULIB_WCSLEN = @GL_GNULIB_WCSLEN@
+GL_GNULIB_WCSNCASECMP = @GL_GNULIB_WCSNCASECMP@
+GL_GNULIB_WCSNCAT = @GL_GNULIB_WCSNCAT@
+GL_GNULIB_WCSNCMP = @GL_GNULIB_WCSNCMP@
+GL_GNULIB_WCSNCPY = @GL_GNULIB_WCSNCPY@
+GL_GNULIB_WCSNLEN = @GL_GNULIB_WCSNLEN@
+GL_GNULIB_WCSNRTOMBS = @GL_GNULIB_WCSNRTOMBS@
+GL_GNULIB_WCSPBRK = @GL_GNULIB_WCSPBRK@
+GL_GNULIB_WCSRCHR = @GL_GNULIB_WCSRCHR@
+GL_GNULIB_WCSRTOMBS = @GL_GNULIB_WCSRTOMBS@
+GL_GNULIB_WCSSPN = @GL_GNULIB_WCSSPN@
+GL_GNULIB_WCSSTR = @GL_GNULIB_WCSSTR@
+GL_GNULIB_WCSTOK = @GL_GNULIB_WCSTOK@
+GL_GNULIB_WCSWIDTH = @GL_GNULIB_WCSWIDTH@
+GL_GNULIB_WCSXFRM = @GL_GNULIB_WCSXFRM@
+GL_GNULIB_WCTOB = @GL_GNULIB_WCTOB@
+GL_GNULIB_WCTOMB = @GL_GNULIB_WCTOMB@
+GL_GNULIB_WCTRANS = @GL_GNULIB_WCTRANS@
+GL_GNULIB_WCTYPE = @GL_GNULIB_WCTYPE@
+GL_GNULIB_WCWIDTH = @GL_GNULIB_WCWIDTH@
+GL_GNULIB_WMEMCHR = @GL_GNULIB_WMEMCHR@
+GL_GNULIB_WMEMCMP = @GL_GNULIB_WMEMCMP@
+GL_GNULIB_WMEMCPY = @GL_GNULIB_WMEMCPY@
+GL_GNULIB_WMEMMOVE = @GL_GNULIB_WMEMMOVE@
+GL_GNULIB_WMEMPCPY = @GL_GNULIB_WMEMPCPY@
+GL_GNULIB_WMEMSET = @GL_GNULIB_WMEMSET@
+GL_GNULIB_WRITE = @GL_GNULIB_WRITE@
+GL_GNULIB__EXIT = @GL_GNULIB__EXIT@
+GMSGFMT = @GMSGFMT@
+GMSGFMT_015 = @GMSGFMT_015@
+GNULIBHEADERS_OVERRIDE_WINT_T = @GNULIBHEADERS_OVERRIDE_WINT_T@
+GNULIB_GETTIMEOFDAY = @GNULIB_GETTIMEOFDAY@
+GNULIB_TEST_WARN_CFLAGS = @GNULIB_TEST_WARN_CFLAGS@
+GNULIB_WARN_CFLAGS = @GNULIB_WARN_CFLAGS@
+GREP = @GREP@
+HAVE_ACCEPT4 = @HAVE_ACCEPT4@
+HAVE_ALIGNED_ALLOC = @HAVE_ALIGNED_ALLOC@
+HAVE_ALLOCA_H = @HAVE_ALLOCA_H@
+HAVE_ALPHASORT = @HAVE_ALPHASORT@
+HAVE_ARPA_INET_H = @HAVE_ARPA_INET_H@
+HAVE_ATOLL = @HAVE_ATOLL@
+HAVE_BTOWC = @HAVE_BTOWC@
+HAVE_C99_STDINT_H = @HAVE_C99_STDINT_H@
+HAVE_CANONICALIZE_FILE_NAME = @HAVE_CANONICALIZE_FILE_NAME@
+HAVE_CHOWN = @HAVE_CHOWN@
+HAVE_CLOSEDIR = @HAVE_CLOSEDIR@
+HAVE_COPY_FILE_RANGE = @HAVE_COPY_FILE_RANGE@
+HAVE_CRTDEFS_H = @HAVE_CRTDEFS_H@
+HAVE_DECL_DIRFD = @HAVE_DECL_DIRFD@
+HAVE_DECL_ECVT = @HAVE_DECL_ECVT@
+HAVE_DECL_ENVIRON = @HAVE_DECL_ENVIRON@
+HAVE_DECL_EXECVPE = @HAVE_DECL_EXECVPE@
+HAVE_DECL_FCHDIR = @HAVE_DECL_FCHDIR@
+HAVE_DECL_FCLOSEALL = @HAVE_DECL_FCLOSEALL@
+HAVE_DECL_FCVT = @HAVE_DECL_FCVT@
+HAVE_DECL_FDATASYNC = @HAVE_DECL_FDATASYNC@
+HAVE_DECL_FDOPENDIR = @HAVE_DECL_FDOPENDIR@
+HAVE_DECL_FPURGE = @HAVE_DECL_FPURGE@
+HAVE_DECL_FSEEKO = @HAVE_DECL_FSEEKO@
+HAVE_DECL_FTELLO = @HAVE_DECL_FTELLO@
+HAVE_DECL_GCVT = @HAVE_DECL_GCVT@
+HAVE_DECL_GETDELIM = @HAVE_DECL_GETDELIM@
+HAVE_DECL_GETDOMAINNAME = @HAVE_DECL_GETDOMAINNAME@
+HAVE_DECL_GETLINE = @HAVE_DECL_GETLINE@
+HAVE_DECL_GETLOADAVG = @HAVE_DECL_GETLOADAVG@
+HAVE_DECL_GETLOGIN = @HAVE_DECL_GETLOGIN@
+HAVE_DECL_GETLOGIN_R = @HAVE_DECL_GETLOGIN_R@
+HAVE_DECL_GETPAGESIZE = @HAVE_DECL_GETPAGESIZE@
+HAVE_DECL_GETUSERSHELL = @HAVE_DECL_GETUSERSHELL@
+HAVE_DECL_IMAXABS = @HAVE_DECL_IMAXABS@
+HAVE_DECL_IMAXDIV = @HAVE_DECL_IMAXDIV@
+HAVE_DECL_INET_NTOP = @HAVE_DECL_INET_NTOP@
+HAVE_DECL_INET_PTON = @HAVE_DECL_INET_PTON@
+HAVE_DECL_INITSTATE = @HAVE_DECL_INITSTATE@
+HAVE_DECL_LOCALTIME_R = @HAVE_DECL_LOCALTIME_R@
+HAVE_DECL_MEMMEM = @HAVE_DECL_MEMMEM@
+HAVE_DECL_MEMRCHR = @HAVE_DECL_MEMRCHR@
+HAVE_DECL_OBSTACK_PRINTF = @HAVE_DECL_OBSTACK_PRINTF@
+HAVE_DECL_SETENV = @HAVE_DECL_SETENV@
+HAVE_DECL_SETHOSTNAME = @HAVE_DECL_SETHOSTNAME@
+HAVE_DECL_SETSTATE = @HAVE_DECL_SETSTATE@
+HAVE_DECL_SNPRINTF = @HAVE_DECL_SNPRINTF@
+HAVE_DECL_STRDUP = @HAVE_DECL_STRDUP@
+HAVE_DECL_STRERROR_R = @HAVE_DECL_STRERROR_R@
+HAVE_DECL_STRNDUP = @HAVE_DECL_STRNDUP@
+HAVE_DECL_STRNLEN = @HAVE_DECL_STRNLEN@
+HAVE_DECL_STRSIGNAL = @HAVE_DECL_STRSIGNAL@
+HAVE_DECL_STRTOIMAX = @HAVE_DECL_STRTOIMAX@
+HAVE_DECL_STRTOK_R = @HAVE_DECL_STRTOK_R@
+HAVE_DECL_STRTOUMAX = @HAVE_DECL_STRTOUMAX@
+HAVE_DECL_TRUNCATE = @HAVE_DECL_TRUNCATE@
+HAVE_DECL_TTYNAME_R = @HAVE_DECL_TTYNAME_R@
+HAVE_DECL_UNSETENV = @HAVE_DECL_UNSETENV@
+HAVE_DECL_VSNPRINTF = @HAVE_DECL_VSNPRINTF@
+HAVE_DECL_WCSDUP = @HAVE_DECL_WCSDUP@
+HAVE_DECL_WCTOB = @HAVE_DECL_WCTOB@
+HAVE_DECL_WCWIDTH = @HAVE_DECL_WCWIDTH@
+HAVE_DIRENT_H = @HAVE_DIRENT_H@
+HAVE_DPRINTF = @HAVE_DPRINTF@
+HAVE_DUP3 = @HAVE_DUP3@
+HAVE_DUPLOCALE = @HAVE_DUPLOCALE@
+HAVE_EUIDACCESS = @HAVE_EUIDACCESS@
+HAVE_EXECVPE = @HAVE_EXECVPE@
+HAVE_EXPLICIT_BZERO = @HAVE_EXPLICIT_BZERO@
+HAVE_FACCESSAT = @HAVE_FACCESSAT@
+HAVE_FCHDIR = @HAVE_FCHDIR@
+HAVE_FCHMODAT = @HAVE_FCHMODAT@
+HAVE_FCHOWNAT = @HAVE_FCHOWNAT@
+HAVE_FCNTL = @HAVE_FCNTL@
+HAVE_FDATASYNC = @HAVE_FDATASYNC@
+HAVE_FDOPENDIR = @HAVE_FDOPENDIR@
+HAVE_FEATURES_H = @HAVE_FEATURES_H@
+HAVE_FFSL = @HAVE_FFSL@
+HAVE_FFSLL = @HAVE_FFSLL@
+HAVE_FNMATCH = @HAVE_FNMATCH@
+HAVE_FNMATCH_H = @HAVE_FNMATCH_H@
+HAVE_FREELOCALE = @HAVE_FREELOCALE@
+HAVE_FSEEKO = @HAVE_FSEEKO@
+HAVE_FSTATAT = @HAVE_FSTATAT@
+HAVE_FSYNC = @HAVE_FSYNC@
+HAVE_FTELLO = @HAVE_FTELLO@
+HAVE_FTRUNCATE = @HAVE_FTRUNCATE@
+HAVE_FUTIMENS = @HAVE_FUTIMENS@
+HAVE_GETDTABLESIZE = @HAVE_GETDTABLESIZE@
+HAVE_GETENTROPY = @HAVE_GETENTROPY@
+HAVE_GETGROUPS = @HAVE_GETGROUPS@
+HAVE_GETHOSTNAME = @HAVE_GETHOSTNAME@
+HAVE_GETLOGIN = @HAVE_GETLOGIN@
+HAVE_GETOPT_H = @HAVE_GETOPT_H@
+HAVE_GETPAGESIZE = @HAVE_GETPAGESIZE@
+HAVE_GETPASS = @HAVE_GETPASS@
+HAVE_GETSUBOPT = @HAVE_GETSUBOPT@
+HAVE_GETTIMEOFDAY = @HAVE_GETTIMEOFDAY@
+HAVE_GETUMASK = @HAVE_GETUMASK@
+HAVE_GRANTPT = @HAVE_GRANTPT@
+HAVE_GROUP_MEMBER = @HAVE_GROUP_MEMBER@
+HAVE_IMAXDIV_T = @HAVE_IMAXDIV_T@
+HAVE_INITSTATE = @HAVE_INITSTATE@
+HAVE_INTTYPES_H = @HAVE_INTTYPES_H@
+HAVE_ISBLANK = @HAVE_ISBLANK@
+HAVE_ISWBLANK = @HAVE_ISWBLANK@
+HAVE_ISWCNTRL = @HAVE_ISWCNTRL@
+HAVE_LANGINFO_ALTMON = @HAVE_LANGINFO_ALTMON@
+HAVE_LANGINFO_CODESET = @HAVE_LANGINFO_CODESET@
+HAVE_LANGINFO_ERA = @HAVE_LANGINFO_ERA@
+HAVE_LANGINFO_H = @HAVE_LANGINFO_H@
+HAVE_LANGINFO_T_FMT_AMPM = @HAVE_LANGINFO_T_FMT_AMPM@
+HAVE_LANGINFO_YESEXPR = @HAVE_LANGINFO_YESEXPR@
+HAVE_LCHMOD = @HAVE_LCHMOD@
+HAVE_LCHOWN = @HAVE_LCHOWN@
+HAVE_LIBSIGSEGV = @HAVE_LIBSIGSEGV@
+HAVE_LINK = @HAVE_LINK@
+HAVE_LINKAT = @HAVE_LINKAT@
+HAVE_LSTAT = @HAVE_LSTAT@
+HAVE_MAX_ALIGN_T = @HAVE_MAX_ALIGN_T@
+HAVE_MBRLEN = @HAVE_MBRLEN@
+HAVE_MBRTOWC = @HAVE_MBRTOWC@
+HAVE_MBSINIT = @HAVE_MBSINIT@
+HAVE_MBSLEN = @HAVE_MBSLEN@
+HAVE_MBSNRTOWCS = @HAVE_MBSNRTOWCS@
+HAVE_MBSRTOWCS = @HAVE_MBSRTOWCS@
+HAVE_MBTOWC = @HAVE_MBTOWC@
+HAVE_MEMPCPY = @HAVE_MEMPCPY@
+HAVE_MKDIRAT = @HAVE_MKDIRAT@
+HAVE_MKDTEMP = @HAVE_MKDTEMP@
+HAVE_MKFIFO = @HAVE_MKFIFO@
+HAVE_MKFIFOAT = @HAVE_MKFIFOAT@
+HAVE_MKNOD = @HAVE_MKNOD@
+HAVE_MKNODAT = @HAVE_MKNODAT@
+HAVE_MKOSTEMP = @HAVE_MKOSTEMP@
+HAVE_MKOSTEMPS = @HAVE_MKOSTEMPS@
+HAVE_MKSTEMP = @HAVE_MKSTEMP@
+HAVE_MKSTEMPS = @HAVE_MKSTEMPS@
+HAVE_MSVC_INVALID_PARAMETER_HANDLER = @HAVE_MSVC_INVALID_PARAMETER_HANDLER@
+HAVE_NANOSLEEP = @HAVE_NANOSLEEP@
+HAVE_NETINET_IN_H = @HAVE_NETINET_IN_H@
+HAVE_NEWLOCALE = @HAVE_NEWLOCALE@
+HAVE_NL_LANGINFO = @HAVE_NL_LANGINFO@
+HAVE_OPENAT = @HAVE_OPENAT@
+HAVE_OPENDIR = @HAVE_OPENDIR@
+HAVE_OS_H = @HAVE_OS_H@
+HAVE_PCLOSE = @HAVE_PCLOSE@
+HAVE_PIPE = @HAVE_PIPE@
+HAVE_PIPE2 = @HAVE_PIPE2@
+HAVE_POPEN = @HAVE_POPEN@
+HAVE_POSIX_MEMALIGN = @HAVE_POSIX_MEMALIGN@
+HAVE_POSIX_OPENPT = @HAVE_POSIX_OPENPT@
+HAVE_POSIX_SIGNALBLOCKING = @HAVE_POSIX_SIGNALBLOCKING@
+HAVE_PREAD = @HAVE_PREAD@
+HAVE_PSELECT = @HAVE_PSELECT@
+HAVE_PTHREAD_ATTR_DESTROY = @HAVE_PTHREAD_ATTR_DESTROY@
+HAVE_PTHREAD_ATTR_GETDETACHSTATE = @HAVE_PTHREAD_ATTR_GETDETACHSTATE@
+HAVE_PTHREAD_ATTR_INIT = @HAVE_PTHREAD_ATTR_INIT@
+HAVE_PTHREAD_ATTR_SETDETACHSTATE = @HAVE_PTHREAD_ATTR_SETDETACHSTATE@
+HAVE_PTHREAD_CONDATTR_DESTROY = @HAVE_PTHREAD_CONDATTR_DESTROY@
+HAVE_PTHREAD_CONDATTR_INIT = @HAVE_PTHREAD_CONDATTR_INIT@
+HAVE_PTHREAD_COND_BROADCAST = @HAVE_PTHREAD_COND_BROADCAST@
+HAVE_PTHREAD_COND_DESTROY = @HAVE_PTHREAD_COND_DESTROY@
+HAVE_PTHREAD_COND_INIT = @HAVE_PTHREAD_COND_INIT@
+HAVE_PTHREAD_COND_SIGNAL = @HAVE_PTHREAD_COND_SIGNAL@
+HAVE_PTHREAD_COND_TIMEDWAIT = @HAVE_PTHREAD_COND_TIMEDWAIT@
+HAVE_PTHREAD_COND_WAIT = @HAVE_PTHREAD_COND_WAIT@
+HAVE_PTHREAD_CREATE = @HAVE_PTHREAD_CREATE@
+HAVE_PTHREAD_CREATE_DETACHED = @HAVE_PTHREAD_CREATE_DETACHED@
+HAVE_PTHREAD_DETACH = @HAVE_PTHREAD_DETACH@
+HAVE_PTHREAD_EQUAL = @HAVE_PTHREAD_EQUAL@
+HAVE_PTHREAD_EXIT = @HAVE_PTHREAD_EXIT@
+HAVE_PTHREAD_GETSPECIFIC = @HAVE_PTHREAD_GETSPECIFIC@
+HAVE_PTHREAD_H = @HAVE_PTHREAD_H@
+HAVE_PTHREAD_JOIN = @HAVE_PTHREAD_JOIN@
+HAVE_PTHREAD_KEY_CREATE = @HAVE_PTHREAD_KEY_CREATE@
+HAVE_PTHREAD_KEY_DELETE = @HAVE_PTHREAD_KEY_DELETE@
+HAVE_PTHREAD_MUTEXATTR_DESTROY = @HAVE_PTHREAD_MUTEXATTR_DESTROY@
+HAVE_PTHREAD_MUTEXATTR_GETROBUST = @HAVE_PTHREAD_MUTEXATTR_GETROBUST@
+HAVE_PTHREAD_MUTEXATTR_GETTYPE = @HAVE_PTHREAD_MUTEXATTR_GETTYPE@
+HAVE_PTHREAD_MUTEXATTR_INIT = @HAVE_PTHREAD_MUTEXATTR_INIT@
+HAVE_PTHREAD_MUTEXATTR_SETROBUST = @HAVE_PTHREAD_MUTEXATTR_SETROBUST@
+HAVE_PTHREAD_MUTEXATTR_SETTYPE = @HAVE_PTHREAD_MUTEXATTR_SETTYPE@
+HAVE_PTHREAD_MUTEX_DESTROY = @HAVE_PTHREAD_MUTEX_DESTROY@
+HAVE_PTHREAD_MUTEX_INIT = @HAVE_PTHREAD_MUTEX_INIT@
+HAVE_PTHREAD_MUTEX_LOCK = @HAVE_PTHREAD_MUTEX_LOCK@
+HAVE_PTHREAD_MUTEX_RECURSIVE = @HAVE_PTHREAD_MUTEX_RECURSIVE@
+HAVE_PTHREAD_MUTEX_ROBUST = @HAVE_PTHREAD_MUTEX_ROBUST@
+HAVE_PTHREAD_MUTEX_TIMEDLOCK = @HAVE_PTHREAD_MUTEX_TIMEDLOCK@
+HAVE_PTHREAD_MUTEX_TRYLOCK = @HAVE_PTHREAD_MUTEX_TRYLOCK@
+HAVE_PTHREAD_MUTEX_UNLOCK = @HAVE_PTHREAD_MUTEX_UNLOCK@
+HAVE_PTHREAD_ONCE = @HAVE_PTHREAD_ONCE@
+HAVE_PTHREAD_PROCESS_SHARED = @HAVE_PTHREAD_PROCESS_SHARED@
+HAVE_PTHREAD_RWLOCKATTR_DESTROY = @HAVE_PTHREAD_RWLOCKATTR_DESTROY@
+HAVE_PTHREAD_RWLOCKATTR_INIT = @HAVE_PTHREAD_RWLOCKATTR_INIT@
+HAVE_PTHREAD_RWLOCK_DESTROY = @HAVE_PTHREAD_RWLOCK_DESTROY@
+HAVE_PTHREAD_RWLOCK_INIT = @HAVE_PTHREAD_RWLOCK_INIT@
+HAVE_PTHREAD_RWLOCK_RDLOCK = @HAVE_PTHREAD_RWLOCK_RDLOCK@
+HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK = @HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK@
+HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK = @HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK@
+HAVE_PTHREAD_RWLOCK_TRYRDLOCK = @HAVE_PTHREAD_RWLOCK_TRYRDLOCK@
+HAVE_PTHREAD_RWLOCK_TRYWRLOCK = @HAVE_PTHREAD_RWLOCK_TRYWRLOCK@
+HAVE_PTHREAD_RWLOCK_UNLOCK = @HAVE_PTHREAD_RWLOCK_UNLOCK@
+HAVE_PTHREAD_RWLOCK_WRLOCK = @HAVE_PTHREAD_RWLOCK_WRLOCK@
+HAVE_PTHREAD_SELF = @HAVE_PTHREAD_SELF@
+HAVE_PTHREAD_SETSPECIFIC = @HAVE_PTHREAD_SETSPECIFIC@
+HAVE_PTHREAD_SIGMASK = @HAVE_PTHREAD_SIGMASK@
+HAVE_PTHREAD_SPINLOCK_T = @HAVE_PTHREAD_SPINLOCK_T@
+HAVE_PTHREAD_SPIN_DESTROY = @HAVE_PTHREAD_SPIN_DESTROY@
+HAVE_PTHREAD_SPIN_INIT = @HAVE_PTHREAD_SPIN_INIT@
+HAVE_PTHREAD_SPIN_LOCK = @HAVE_PTHREAD_SPIN_LOCK@
+HAVE_PTHREAD_SPIN_TRYLOCK = @HAVE_PTHREAD_SPIN_TRYLOCK@
+HAVE_PTHREAD_SPIN_UNLOCK = @HAVE_PTHREAD_SPIN_UNLOCK@
+HAVE_PTHREAD_T = @HAVE_PTHREAD_T@
+HAVE_PTSNAME = @HAVE_PTSNAME@
+HAVE_PTSNAME_R = @HAVE_PTSNAME_R@
+HAVE_PWRITE = @HAVE_PWRITE@
+HAVE_QSORT_R = @HAVE_QSORT_R@
+HAVE_RAISE = @HAVE_RAISE@
+HAVE_RANDOM = @HAVE_RANDOM@
+HAVE_RANDOM_H = @HAVE_RANDOM_H@
+HAVE_RANDOM_R = @HAVE_RANDOM_R@
+HAVE_RAWMEMCHR = @HAVE_RAWMEMCHR@
+HAVE_READDIR = @HAVE_READDIR@
+HAVE_READLINK = @HAVE_READLINK@
+HAVE_READLINKAT = @HAVE_READLINKAT@
+HAVE_REALLOCARRAY = @HAVE_REALLOCARRAY@
+HAVE_REALPATH = @HAVE_REALPATH@
+HAVE_RENAMEAT = @HAVE_RENAMEAT@
+HAVE_REWINDDIR = @HAVE_REWINDDIR@
+HAVE_RPMATCH = @HAVE_RPMATCH@
+HAVE_SA_FAMILY_T = @HAVE_SA_FAMILY_T@
+HAVE_SCANDIR = @HAVE_SCANDIR@
+HAVE_SCHED_H = @HAVE_SCHED_H@
+HAVE_SCHED_YIELD = @HAVE_SCHED_YIELD@
+HAVE_SECURE_GETENV = @HAVE_SECURE_GETENV@
+HAVE_SETENV = @HAVE_SETENV@
+HAVE_SETHOSTNAME = @HAVE_SETHOSTNAME@
+HAVE_SETSTATE = @HAVE_SETSTATE@
+HAVE_SIGABBREV_NP = @HAVE_SIGABBREV_NP@
+HAVE_SIGACTION = @HAVE_SIGACTION@
+HAVE_SIGDESCR_NP = @HAVE_SIGDESCR_NP@
+HAVE_SIGHANDLER_T = @HAVE_SIGHANDLER_T@
+HAVE_SIGINFO_T = @HAVE_SIGINFO_T@
+HAVE_SIGNED_SIG_ATOMIC_T = @HAVE_SIGNED_SIG_ATOMIC_T@
+HAVE_SIGNED_WCHAR_T = @HAVE_SIGNED_WCHAR_T@
+HAVE_SIGNED_WINT_T = @HAVE_SIGNED_WINT_T@
+HAVE_SIGSET_T = @HAVE_SIGSET_T@
+HAVE_SLEEP = @HAVE_SLEEP@
+HAVE_STDINT_H = @HAVE_STDINT_H@
+HAVE_STPCPY = @HAVE_STPCPY@
+HAVE_STPNCPY = @HAVE_STPNCPY@
+HAVE_STRCASESTR = @HAVE_STRCASESTR@
+HAVE_STRCHRNUL = @HAVE_STRCHRNUL@
+HAVE_STRERRORNAME_NP = @HAVE_STRERRORNAME_NP@
+HAVE_STRPBRK = @HAVE_STRPBRK@
+HAVE_STRPTIME = @HAVE_STRPTIME@
+HAVE_STRSEP = @HAVE_STRSEP@
+HAVE_STRTOD = @HAVE_STRTOD@
+HAVE_STRTOL = @HAVE_STRTOL@
+HAVE_STRTOLD = @HAVE_STRTOLD@
+HAVE_STRTOLL = @HAVE_STRTOLL@
+HAVE_STRTOUL = @HAVE_STRTOUL@
+HAVE_STRTOULL = @HAVE_STRTOULL@
+HAVE_STRUCT_RANDOM_DATA = @HAVE_STRUCT_RANDOM_DATA@
+HAVE_STRUCT_SCHED_PARAM = @HAVE_STRUCT_SCHED_PARAM@
+HAVE_STRUCT_SIGACTION_SA_SIGACTION = @HAVE_STRUCT_SIGACTION_SA_SIGACTION@
+HAVE_STRUCT_SOCKADDR_STORAGE = @HAVE_STRUCT_SOCKADDR_STORAGE@
+HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY = @HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY@
+HAVE_STRUCT_TIMEVAL = @HAVE_STRUCT_TIMEVAL@
+HAVE_STRVERSCMP = @HAVE_STRVERSCMP@
+HAVE_SYMLINK = @HAVE_SYMLINK@
+HAVE_SYMLINKAT = @HAVE_SYMLINKAT@
+HAVE_SYS_BITYPES_H = @HAVE_SYS_BITYPES_H@
+HAVE_SYS_CDEFS_H = @HAVE_SYS_CDEFS_H@
+HAVE_SYS_INTTYPES_H = @HAVE_SYS_INTTYPES_H@
+HAVE_SYS_IOCTL_H = @HAVE_SYS_IOCTL_H@
+HAVE_SYS_LOADAVG_H = @HAVE_SYS_LOADAVG_H@
+HAVE_SYS_PARAM_H = @HAVE_SYS_PARAM_H@
+HAVE_SYS_SELECT_H = @HAVE_SYS_SELECT_H@
+HAVE_SYS_SOCKET_H = @HAVE_SYS_SOCKET_H@
+HAVE_SYS_TIME_H = @HAVE_SYS_TIME_H@
+HAVE_SYS_TYPES_H = @HAVE_SYS_TYPES_H@
+HAVE_SYS_UIO_H = @HAVE_SYS_UIO_H@
+HAVE_TIMEGM = @HAVE_TIMEGM@
+HAVE_TIMESPEC_GET = @HAVE_TIMESPEC_GET@
+HAVE_TIMEZONE_T = @HAVE_TIMEZONE_T@
+HAVE_TYPE_VOLATILE_SIG_ATOMIC_T = @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
+HAVE_UNISTD_H = @HAVE_UNISTD_H@
+HAVE_UNLINKAT = @HAVE_UNLINKAT@
+HAVE_UNLOCKPT = @HAVE_UNLOCKPT@
+HAVE_USLEEP = @HAVE_USLEEP@
+HAVE_UTIMENSAT = @HAVE_UTIMENSAT@
+HAVE_VASPRINTF = @HAVE_VASPRINTF@
+HAVE_VDPRINTF = @HAVE_VDPRINTF@
+HAVE_VISIBILITY = @HAVE_VISIBILITY@
+HAVE_WCHAR_H = @HAVE_WCHAR_H@
+HAVE_WCHAR_T = @HAVE_WCHAR_T@
+HAVE_WCPCPY = @HAVE_WCPCPY@
+HAVE_WCPNCPY = @HAVE_WCPNCPY@
+HAVE_WCRTOMB = @HAVE_WCRTOMB@
+HAVE_WCSCASECMP = @HAVE_WCSCASECMP@
+HAVE_WCSCAT = @HAVE_WCSCAT@
+HAVE_WCSCHR = @HAVE_WCSCHR@
+HAVE_WCSCMP = @HAVE_WCSCMP@
+HAVE_WCSCOLL = @HAVE_WCSCOLL@
+HAVE_WCSCPY = @HAVE_WCSCPY@
+HAVE_WCSCSPN = @HAVE_WCSCSPN@
+HAVE_WCSDUP = @HAVE_WCSDUP@
+HAVE_WCSFTIME = @HAVE_WCSFTIME@
+HAVE_WCSLEN = @HAVE_WCSLEN@
+HAVE_WCSNCASECMP = @HAVE_WCSNCASECMP@
+HAVE_WCSNCAT = @HAVE_WCSNCAT@
+HAVE_WCSNCMP = @HAVE_WCSNCMP@
+HAVE_WCSNCPY = @HAVE_WCSNCPY@
+HAVE_WCSNLEN = @HAVE_WCSNLEN@
+HAVE_WCSNRTOMBS = @HAVE_WCSNRTOMBS@
+HAVE_WCSPBRK = @HAVE_WCSPBRK@
+HAVE_WCSRCHR = @HAVE_WCSRCHR@
+HAVE_WCSRTOMBS = @HAVE_WCSRTOMBS@
+HAVE_WCSSPN = @HAVE_WCSSPN@
+HAVE_WCSSTR = @HAVE_WCSSTR@
+HAVE_WCSTOK = @HAVE_WCSTOK@
+HAVE_WCSWIDTH = @HAVE_WCSWIDTH@
+HAVE_WCSXFRM = @HAVE_WCSXFRM@
+HAVE_WCTRANS_T = @HAVE_WCTRANS_T@
+HAVE_WCTYPE_H = @HAVE_WCTYPE_H@
+HAVE_WCTYPE_T = @HAVE_WCTYPE_T@
+HAVE_WINSOCK2_H = @HAVE_WINSOCK2_H@
+HAVE_WINT_T = @HAVE_WINT_T@
+HAVE_WMEMCHR = @HAVE_WMEMCHR@
+HAVE_WMEMCMP = @HAVE_WMEMCMP@
+HAVE_WMEMCPY = @HAVE_WMEMCPY@
+HAVE_WMEMMOVE = @HAVE_WMEMMOVE@
+HAVE_WMEMPCPY = @HAVE_WMEMPCPY@
+HAVE_WMEMSET = @HAVE_WMEMSET@
+HAVE_WS2TCPIP_H = @HAVE_WS2TCPIP_H@
+HAVE_XLOCALE_H = @HAVE_XLOCALE_H@
+HAVE__BOOL = @HAVE__BOOL@
+HAVE__EXIT = @HAVE__EXIT@
+HOST_CPU = @HOST_CPU@
+HOST_CPU_C_ABI = @HOST_CPU_C_ABI@
+ICONV_CONST = @ICONV_CONST@
+ICONV_H = @ICONV_H@
+INCLUDE_NEXT = @INCLUDE_NEXT@
+INCLUDE_NEXT_AS_FIRST_DIRECTIVE = @INCLUDE_NEXT_AS_FIRST_DIRECTIVE@
+INET_PTON_LIB = @INET_PTON_LIB@
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+INT32_MAX_LT_INTMAX_MAX = @INT32_MAX_LT_INTMAX_MAX@
+INT64_MAX_EQ_LONG_MAX = @INT64_MAX_EQ_LONG_MAX@
+INTLLIBS = @INTLLIBS@
+INTL_MACOSX_LIBS = @INTL_MACOSX_LIBS@
+LDFLAGS = @LDFLAGS@
+LIBCSTACK = @LIBCSTACK@
+LIBGREPUTILS_LIBDEPS = @LIBGREPUTILS_LIBDEPS@
+LIBGREPUTILS_LTLIBDEPS = @LIBGREPUTILS_LTLIBDEPS@
+LIBICONV = @LIBICONV@
+LIBINTL = @LIBINTL@
+LIBMULTITHREAD = @LIBMULTITHREAD@
+LIBOBJS = @LIBOBJS@
+LIBPMULTITHREAD = @LIBPMULTITHREAD@
+LIBPTHREAD = @LIBPTHREAD@
+LIBS = @LIBS@
+LIBSIGSEGV = @LIBSIGSEGV@
+LIBSIGSEGV_PREFIX = @LIBSIGSEGV_PREFIX@
+LIBSOCKET = @LIBSOCKET@
+LIBSTDTHREAD = @LIBSTDTHREAD@
+LIBTESTS_LIBDEPS = @LIBTESTS_LIBDEPS@
+LIBTHREAD = @LIBTHREAD@
+LIBUNISTRING_UNISTR_H = @LIBUNISTRING_UNISTR_H@
+LIBUNISTRING_UNITYPES_H = @LIBUNISTRING_UNITYPES_H@
+LIBUNISTRING_UNIWIDTH_H = @LIBUNISTRING_UNIWIDTH_H@
+LIB_HARD_LOCALE = @LIB_HARD_LOCALE@
+LIB_MBRTOWC = @LIB_MBRTOWC@
+LIB_NANOSLEEP = @LIB_NANOSLEEP@
+LIB_NL_LANGINFO = @LIB_NL_LANGINFO@
+LIB_PTHREAD = @LIB_PTHREAD@
+LIB_PTHREAD_SIGMASK = @LIB_PTHREAD_SIGMASK@
+LIB_SCHED_YIELD = @LIB_SCHED_YIELD@
+LIB_SELECT = @LIB_SELECT@
+LIB_SETLOCALE = @LIB_SETLOCALE@
+LIB_SETLOCALE_NULL = @LIB_SETLOCALE_NULL@
+LIMITS_H = @LIMITS_H@
+LOCALCHARSET_TESTS_ENVIRONMENT = @LOCALCHARSET_TESTS_ENVIRONMENT@
+LOCALENAME_ENHANCE_LOCALE_FUNCS = @LOCALENAME_ENHANCE_LOCALE_FUNCS@
+LOCALE_FR = @LOCALE_FR@
+LOCALE_FR_UTF8 = @LOCALE_FR_UTF8@
+LOCALE_JA = @LOCALE_JA@
+LOCALE_TR_UTF8 = @LOCALE_TR_UTF8@
+LOCALE_ZH_CN = @LOCALE_ZH_CN@
+LTLIBCSTACK = @LTLIBCSTACK@
+LTLIBICONV = @LTLIBICONV@
+LTLIBINTL = @LTLIBINTL@
+LTLIBMULTITHREAD = @LTLIBMULTITHREAD@
+LTLIBOBJS = @LTLIBOBJS@
+LTLIBSIGSEGV = @LTLIBSIGSEGV@
+LTLIBTHREAD = @LTLIBTHREAD@
+MAKEINFO = @MAKEINFO@
+MKDIR_P = @MKDIR_P@
+MSGFMT = @MSGFMT@
+MSGFMT_015 = @MSGFMT_015@
+MSGMERGE = @MSGMERGE@
+NETINET_IN_H = @NETINET_IN_H@
+NEXT_ARPA_INET_H = @NEXT_ARPA_INET_H@
+NEXT_AS_FIRST_DIRECTIVE_ARPA_INET_H = @NEXT_AS_FIRST_DIRECTIVE_ARPA_INET_H@
+NEXT_AS_FIRST_DIRECTIVE_CTYPE_H = @NEXT_AS_FIRST_DIRECTIVE_CTYPE_H@
+NEXT_AS_FIRST_DIRECTIVE_DIRENT_H = @NEXT_AS_FIRST_DIRECTIVE_DIRENT_H@
+NEXT_AS_FIRST_DIRECTIVE_ERRNO_H = @NEXT_AS_FIRST_DIRECTIVE_ERRNO_H@
+NEXT_AS_FIRST_DIRECTIVE_FCNTL_H = @NEXT_AS_FIRST_DIRECTIVE_FCNTL_H@
+NEXT_AS_FIRST_DIRECTIVE_FLOAT_H = @NEXT_AS_FIRST_DIRECTIVE_FLOAT_H@
+NEXT_AS_FIRST_DIRECTIVE_FNMATCH_H = @NEXT_AS_FIRST_DIRECTIVE_FNMATCH_H@
+NEXT_AS_FIRST_DIRECTIVE_GETOPT_H = @NEXT_AS_FIRST_DIRECTIVE_GETOPT_H@
+NEXT_AS_FIRST_DIRECTIVE_ICONV_H = @NEXT_AS_FIRST_DIRECTIVE_ICONV_H@
+NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H = @NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H@
+NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H = @NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H@
+NEXT_AS_FIRST_DIRECTIVE_LIMITS_H = @NEXT_AS_FIRST_DIRECTIVE_LIMITS_H@
+NEXT_AS_FIRST_DIRECTIVE_LOCALE_H = @NEXT_AS_FIRST_DIRECTIVE_LOCALE_H@
+NEXT_AS_FIRST_DIRECTIVE_NETINET_IN_H = @NEXT_AS_FIRST_DIRECTIVE_NETINET_IN_H@
+NEXT_AS_FIRST_DIRECTIVE_PTHREAD_H = @NEXT_AS_FIRST_DIRECTIVE_PTHREAD_H@
+NEXT_AS_FIRST_DIRECTIVE_SCHED_H = @NEXT_AS_FIRST_DIRECTIVE_SCHED_H@
+NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H = @NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H@
+NEXT_AS_FIRST_DIRECTIVE_STDARG_H = @NEXT_AS_FIRST_DIRECTIVE_STDARG_H@
+NEXT_AS_FIRST_DIRECTIVE_STDDEF_H = @NEXT_AS_FIRST_DIRECTIVE_STDDEF_H@
+NEXT_AS_FIRST_DIRECTIVE_STDINT_H = @NEXT_AS_FIRST_DIRECTIVE_STDINT_H@
+NEXT_AS_FIRST_DIRECTIVE_STDIO_H = @NEXT_AS_FIRST_DIRECTIVE_STDIO_H@
+NEXT_AS_FIRST_DIRECTIVE_STDLIB_H = @NEXT_AS_FIRST_DIRECTIVE_STDLIB_H@
+NEXT_AS_FIRST_DIRECTIVE_STRING_H = @NEXT_AS_FIRST_DIRECTIVE_STRING_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H@
+NEXT_AS_FIRST_DIRECTIVE_TIME_H = @NEXT_AS_FIRST_DIRECTIVE_TIME_H@
+NEXT_AS_FIRST_DIRECTIVE_UNISTD_H = @NEXT_AS_FIRST_DIRECTIVE_UNISTD_H@
+NEXT_AS_FIRST_DIRECTIVE_WCHAR_H = @NEXT_AS_FIRST_DIRECTIVE_WCHAR_H@
+NEXT_AS_FIRST_DIRECTIVE_WCTYPE_H = @NEXT_AS_FIRST_DIRECTIVE_WCTYPE_H@
+NEXT_CTYPE_H = @NEXT_CTYPE_H@
+NEXT_DIRENT_H = @NEXT_DIRENT_H@
+NEXT_ERRNO_H = @NEXT_ERRNO_H@
+NEXT_FCNTL_H = @NEXT_FCNTL_H@
+NEXT_FLOAT_H = @NEXT_FLOAT_H@
+NEXT_FNMATCH_H = @NEXT_FNMATCH_H@
+NEXT_GETOPT_H = @NEXT_GETOPT_H@
+NEXT_ICONV_H = @NEXT_ICONV_H@
+NEXT_INTTYPES_H = @NEXT_INTTYPES_H@
+NEXT_LANGINFO_H = @NEXT_LANGINFO_H@
+NEXT_LIMITS_H = @NEXT_LIMITS_H@
+NEXT_LOCALE_H = @NEXT_LOCALE_H@
+NEXT_NETINET_IN_H = @NEXT_NETINET_IN_H@
+NEXT_PTHREAD_H = @NEXT_PTHREAD_H@
+NEXT_SCHED_H = @NEXT_SCHED_H@
+NEXT_SIGNAL_H = @NEXT_SIGNAL_H@
+NEXT_STDARG_H = @NEXT_STDARG_H@
+NEXT_STDDEF_H = @NEXT_STDDEF_H@
+NEXT_STDINT_H = @NEXT_STDINT_H@
+NEXT_STDIO_H = @NEXT_STDIO_H@
+NEXT_STDLIB_H = @NEXT_STDLIB_H@
+NEXT_STRING_H = @NEXT_STRING_H@
+NEXT_SYS_IOCTL_H = @NEXT_SYS_IOCTL_H@
+NEXT_SYS_SELECT_H = @NEXT_SYS_SELECT_H@
+NEXT_SYS_SOCKET_H = @NEXT_SYS_SOCKET_H@
+NEXT_SYS_STAT_H = @NEXT_SYS_STAT_H@
+NEXT_SYS_TIME_H = @NEXT_SYS_TIME_H@
+NEXT_SYS_TYPES_H = @NEXT_SYS_TYPES_H@
+NEXT_SYS_UIO_H = @NEXT_SYS_UIO_H@
+NEXT_TIME_H = @NEXT_TIME_H@
+NEXT_UNISTD_H = @NEXT_UNISTD_H@
+NEXT_WCHAR_H = @NEXT_WCHAR_H@
+NEXT_WCTYPE_H = @NEXT_WCTYPE_H@
+OBJEXT = @OBJEXT@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_STRING = @PACKAGE_STRING@
+PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+PCRE_CFLAGS = @PCRE_CFLAGS@
+PCRE_LIBS = @PCRE_LIBS@
+PERL = @PERL@
+PKG_CONFIG = @PKG_CONFIG@
+PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@
+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
+POSUB = @POSUB@
+PRAGMA_COLUMNS = @PRAGMA_COLUMNS@
+PRAGMA_SYSTEM_HEADER = @PRAGMA_SYSTEM_HEADER@
+PRIPTR_PREFIX = @PRIPTR_PREFIX@
+PTHREAD_H_DEFINES_STRUCT_TIMESPEC = @PTHREAD_H_DEFINES_STRUCT_TIMESPEC@
+PTRDIFF_T_SUFFIX = @PTRDIFF_T_SUFFIX@
+RANLIB = @RANLIB@
+REPLACE_ACCESS = @REPLACE_ACCESS@
+REPLACE_ALIGNED_ALLOC = @REPLACE_ALIGNED_ALLOC@
+REPLACE_BTOWC = @REPLACE_BTOWC@
+REPLACE_CALLOC = @REPLACE_CALLOC@
+REPLACE_CANONICALIZE_FILE_NAME = @REPLACE_CANONICALIZE_FILE_NAME@
+REPLACE_CHOWN = @REPLACE_CHOWN@
+REPLACE_CLOSE = @REPLACE_CLOSE@
+REPLACE_CLOSEDIR = @REPLACE_CLOSEDIR@
+REPLACE_CREAT = @REPLACE_CREAT@
+REPLACE_CTIME = @REPLACE_CTIME@
+REPLACE_DIRFD = @REPLACE_DIRFD@
+REPLACE_DPRINTF = @REPLACE_DPRINTF@
+REPLACE_DUP = @REPLACE_DUP@
+REPLACE_DUP2 = @REPLACE_DUP2@
+REPLACE_DUPLOCALE = @REPLACE_DUPLOCALE@
+REPLACE_EXECL = @REPLACE_EXECL@
+REPLACE_EXECLE = @REPLACE_EXECLE@
+REPLACE_EXECLP = @REPLACE_EXECLP@
+REPLACE_EXECV = @REPLACE_EXECV@
+REPLACE_EXECVE = @REPLACE_EXECVE@
+REPLACE_EXECVP = @REPLACE_EXECVP@
+REPLACE_EXECVPE = @REPLACE_EXECVPE@
+REPLACE_FACCESSAT = @REPLACE_FACCESSAT@
+REPLACE_FCHMODAT = @REPLACE_FCHMODAT@
+REPLACE_FCHOWNAT = @REPLACE_FCHOWNAT@
+REPLACE_FCLOSE = @REPLACE_FCLOSE@
+REPLACE_FCNTL = @REPLACE_FCNTL@
+REPLACE_FDOPEN = @REPLACE_FDOPEN@
+REPLACE_FDOPENDIR = @REPLACE_FDOPENDIR@
+REPLACE_FFLUSH = @REPLACE_FFLUSH@
+REPLACE_FFSLL = @REPLACE_FFSLL@
+REPLACE_FNMATCH = @REPLACE_FNMATCH@
+REPLACE_FOPEN = @REPLACE_FOPEN@
+REPLACE_FPRINTF = @REPLACE_FPRINTF@
+REPLACE_FPURGE = @REPLACE_FPURGE@
+REPLACE_FREE = @REPLACE_FREE@
+REPLACE_FREELOCALE = @REPLACE_FREELOCALE@
+REPLACE_FREOPEN = @REPLACE_FREOPEN@
+REPLACE_FSEEK = @REPLACE_FSEEK@
+REPLACE_FSEEKO = @REPLACE_FSEEKO@
+REPLACE_FSTAT = @REPLACE_FSTAT@
+REPLACE_FSTATAT = @REPLACE_FSTATAT@
+REPLACE_FTELL = @REPLACE_FTELL@
+REPLACE_FTELLO = @REPLACE_FTELLO@
+REPLACE_FTRUNCATE = @REPLACE_FTRUNCATE@
+REPLACE_FUTIMENS = @REPLACE_FUTIMENS@
+REPLACE_GETCWD = @REPLACE_GETCWD@
+REPLACE_GETDELIM = @REPLACE_GETDELIM@
+REPLACE_GETDOMAINNAME = @REPLACE_GETDOMAINNAME@
+REPLACE_GETDTABLESIZE = @REPLACE_GETDTABLESIZE@
+REPLACE_GETGROUPS = @REPLACE_GETGROUPS@
+REPLACE_GETLINE = @REPLACE_GETLINE@
+REPLACE_GETLOGIN_R = @REPLACE_GETLOGIN_R@
+REPLACE_GETPAGESIZE = @REPLACE_GETPAGESIZE@
+REPLACE_GETPASS = @REPLACE_GETPASS@
+REPLACE_GETTIMEOFDAY = @REPLACE_GETTIMEOFDAY@
+REPLACE_GMTIME = @REPLACE_GMTIME@
+REPLACE_ICONV = @REPLACE_ICONV@
+REPLACE_ICONV_OPEN = @REPLACE_ICONV_OPEN@
+REPLACE_ICONV_UTF = @REPLACE_ICONV_UTF@
+REPLACE_INET_NTOP = @REPLACE_INET_NTOP@
+REPLACE_INET_PTON = @REPLACE_INET_PTON@
+REPLACE_INITSTATE = @REPLACE_INITSTATE@
+REPLACE_IOCTL = @REPLACE_IOCTL@
+REPLACE_ISATTY = @REPLACE_ISATTY@
+REPLACE_ISWBLANK = @REPLACE_ISWBLANK@
+REPLACE_ISWCNTRL = @REPLACE_ISWCNTRL@
+REPLACE_ISWDIGIT = @REPLACE_ISWDIGIT@
+REPLACE_ISWXDIGIT = @REPLACE_ISWXDIGIT@
+REPLACE_ITOLD = @REPLACE_ITOLD@
+REPLACE_LCHOWN = @REPLACE_LCHOWN@
+REPLACE_LINK = @REPLACE_LINK@
+REPLACE_LINKAT = @REPLACE_LINKAT@
+REPLACE_LOCALECONV = @REPLACE_LOCALECONV@
+REPLACE_LOCALTIME = @REPLACE_LOCALTIME@
+REPLACE_LOCALTIME_R = @REPLACE_LOCALTIME_R@
+REPLACE_LSEEK = @REPLACE_LSEEK@
+REPLACE_LSTAT = @REPLACE_LSTAT@
+REPLACE_MALLOC = @REPLACE_MALLOC@
+REPLACE_MBRLEN = @REPLACE_MBRLEN@
+REPLACE_MBRTOWC = @REPLACE_MBRTOWC@
+REPLACE_MBSINIT = @REPLACE_MBSINIT@
+REPLACE_MBSNRTOWCS = @REPLACE_MBSNRTOWCS@
+REPLACE_MBSRTOWCS = @REPLACE_MBSRTOWCS@
+REPLACE_MBSTATE_T = @REPLACE_MBSTATE_T@
+REPLACE_MBTOWC = @REPLACE_MBTOWC@
+REPLACE_MEMCHR = @REPLACE_MEMCHR@
+REPLACE_MEMMEM = @REPLACE_MEMMEM@
+REPLACE_MKDIR = @REPLACE_MKDIR@
+REPLACE_MKFIFO = @REPLACE_MKFIFO@
+REPLACE_MKFIFOAT = @REPLACE_MKFIFOAT@
+REPLACE_MKNOD = @REPLACE_MKNOD@
+REPLACE_MKNODAT = @REPLACE_MKNODAT@
+REPLACE_MKSTEMP = @REPLACE_MKSTEMP@
+REPLACE_MKTIME = @REPLACE_MKTIME@
+REPLACE_NANOSLEEP = @REPLACE_NANOSLEEP@
+REPLACE_NEWLOCALE = @REPLACE_NEWLOCALE@
+REPLACE_NL_LANGINFO = @REPLACE_NL_LANGINFO@
+REPLACE_NULL = @REPLACE_NULL@
+REPLACE_OBSTACK_PRINTF = @REPLACE_OBSTACK_PRINTF@
+REPLACE_OPEN = @REPLACE_OPEN@
+REPLACE_OPENAT = @REPLACE_OPENAT@
+REPLACE_OPENDIR = @REPLACE_OPENDIR@
+REPLACE_PERROR = @REPLACE_PERROR@
+REPLACE_POPEN = @REPLACE_POPEN@
+REPLACE_POSIX_MEMALIGN = @REPLACE_POSIX_MEMALIGN@
+REPLACE_PREAD = @REPLACE_PREAD@
+REPLACE_PRINTF = @REPLACE_PRINTF@
+REPLACE_PSELECT = @REPLACE_PSELECT@
+REPLACE_PTHREAD_ATTR_DESTROY = @REPLACE_PTHREAD_ATTR_DESTROY@
+REPLACE_PTHREAD_ATTR_GETDETACHSTATE = @REPLACE_PTHREAD_ATTR_GETDETACHSTATE@
+REPLACE_PTHREAD_ATTR_INIT = @REPLACE_PTHREAD_ATTR_INIT@
+REPLACE_PTHREAD_ATTR_SETDETACHSTATE = @REPLACE_PTHREAD_ATTR_SETDETACHSTATE@
+REPLACE_PTHREAD_CONDATTR_DESTROY = @REPLACE_PTHREAD_CONDATTR_DESTROY@
+REPLACE_PTHREAD_CONDATTR_INIT = @REPLACE_PTHREAD_CONDATTR_INIT@
+REPLACE_PTHREAD_COND_BROADCAST = @REPLACE_PTHREAD_COND_BROADCAST@
+REPLACE_PTHREAD_COND_DESTROY = @REPLACE_PTHREAD_COND_DESTROY@
+REPLACE_PTHREAD_COND_INIT = @REPLACE_PTHREAD_COND_INIT@
+REPLACE_PTHREAD_COND_SIGNAL = @REPLACE_PTHREAD_COND_SIGNAL@
+REPLACE_PTHREAD_COND_TIMEDWAIT = @REPLACE_PTHREAD_COND_TIMEDWAIT@
+REPLACE_PTHREAD_COND_WAIT = @REPLACE_PTHREAD_COND_WAIT@
+REPLACE_PTHREAD_CREATE = @REPLACE_PTHREAD_CREATE@
+REPLACE_PTHREAD_DETACH = @REPLACE_PTHREAD_DETACH@
+REPLACE_PTHREAD_EQUAL = @REPLACE_PTHREAD_EQUAL@
+REPLACE_PTHREAD_EXIT = @REPLACE_PTHREAD_EXIT@
+REPLACE_PTHREAD_GETSPECIFIC = @REPLACE_PTHREAD_GETSPECIFIC@
+REPLACE_PTHREAD_JOIN = @REPLACE_PTHREAD_JOIN@
+REPLACE_PTHREAD_KEY_CREATE = @REPLACE_PTHREAD_KEY_CREATE@
+REPLACE_PTHREAD_KEY_DELETE = @REPLACE_PTHREAD_KEY_DELETE@
+REPLACE_PTHREAD_MUTEXATTR_DESTROY = @REPLACE_PTHREAD_MUTEXATTR_DESTROY@
+REPLACE_PTHREAD_MUTEXATTR_GETROBUST = @REPLACE_PTHREAD_MUTEXATTR_GETROBUST@
+REPLACE_PTHREAD_MUTEXATTR_GETTYPE = @REPLACE_PTHREAD_MUTEXATTR_GETTYPE@
+REPLACE_PTHREAD_MUTEXATTR_INIT = @REPLACE_PTHREAD_MUTEXATTR_INIT@
+REPLACE_PTHREAD_MUTEXATTR_SETROBUST = @REPLACE_PTHREAD_MUTEXATTR_SETROBUST@
+REPLACE_PTHREAD_MUTEXATTR_SETTYPE = @REPLACE_PTHREAD_MUTEXATTR_SETTYPE@
+REPLACE_PTHREAD_MUTEX_DESTROY = @REPLACE_PTHREAD_MUTEX_DESTROY@
+REPLACE_PTHREAD_MUTEX_INIT = @REPLACE_PTHREAD_MUTEX_INIT@
+REPLACE_PTHREAD_MUTEX_LOCK = @REPLACE_PTHREAD_MUTEX_LOCK@
+REPLACE_PTHREAD_MUTEX_TIMEDLOCK = @REPLACE_PTHREAD_MUTEX_TIMEDLOCK@
+REPLACE_PTHREAD_MUTEX_TRYLOCK = @REPLACE_PTHREAD_MUTEX_TRYLOCK@
+REPLACE_PTHREAD_MUTEX_UNLOCK = @REPLACE_PTHREAD_MUTEX_UNLOCK@
+REPLACE_PTHREAD_ONCE = @REPLACE_PTHREAD_ONCE@
+REPLACE_PTHREAD_RWLOCKATTR_DESTROY = @REPLACE_PTHREAD_RWLOCKATTR_DESTROY@
+REPLACE_PTHREAD_RWLOCKATTR_INIT = @REPLACE_PTHREAD_RWLOCKATTR_INIT@
+REPLACE_PTHREAD_RWLOCK_DESTROY = @REPLACE_PTHREAD_RWLOCK_DESTROY@
+REPLACE_PTHREAD_RWLOCK_INIT = @REPLACE_PTHREAD_RWLOCK_INIT@
+REPLACE_PTHREAD_RWLOCK_RDLOCK = @REPLACE_PTHREAD_RWLOCK_RDLOCK@
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+# Process this file with automake to create Makefile.in
+#
+# Copyright 1997-1998, 2005-2021 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
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+  README		\
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+  THANKS.in		\
+  TODO			\
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+
+dist-zstd: distdir
+	tardir=$(distdir) && $(am__tar) | zstd -c $${ZSTD_CLEVEL-$${ZSTD_OPT--19}} >$(distdir).tar.zst
+	$(am__post_remove_distdir)
+
+dist-tarZ: distdir
+	@echo WARNING: "Support for distribution archives compressed with" \
+		       "legacy program 'compress' is deprecated." >&2
+	@echo WARNING: "It will be removed altogether in Automake 2.0" >&2
+	tardir=$(distdir) && $(am__tar) | compress -c >$(distdir).tar.Z
+	$(am__post_remove_distdir)
+
+dist-shar: distdir
+	@echo WARNING: "Support for shar distribution archives is" \
+	               "deprecated." >&2
+	@echo WARNING: "It will be removed altogether in Automake 2.0" >&2
+	shar $(distdir) | eval GZIP= gzip $(GZIP_ENV) -c >$(distdir).shar.gz
+	$(am__post_remove_distdir)
+
+dist-zip: distdir
+	-rm -f $(distdir).zip
+	zip -rq $(distdir).zip $(distdir)
+	$(am__post_remove_distdir)
+
+dist dist-all:
+	$(MAKE) $(AM_MAKEFLAGS) $(DIST_TARGETS) am__post_remove_distdir='@:'
+	$(am__post_remove_distdir)
+
+# This target untars the dist file and tries a VPATH configuration.  Then
+# it guarantees that the distribution is self-contained by making another
+# tarfile.
+distcheck: dist
+	case '$(DIST_ARCHIVES)' in \
+	*.tar.gz*) \
+	  eval GZIP= gzip $(GZIP_ENV) -dc $(distdir).tar.gz | $(am__untar) ;;\
+	*.tar.bz2*) \
+	  bzip2 -dc $(distdir).tar.bz2 | $(am__untar) ;;\
+	*.tar.lz*) \
+	  lzip -dc $(distdir).tar.lz | $(am__untar) ;;\
+	*.tar.xz*) \
+	  xz -dc $(distdir).tar.xz | $(am__untar) ;;\
+	*.tar.Z*) \
+	  uncompress -c $(distdir).tar.Z | $(am__untar) ;;\
+	*.shar.gz*) \
+	  eval GZIP= gzip $(GZIP_ENV) -dc $(distdir).shar.gz | unshar ;;\
+	*.zip*) \
+	  unzip $(distdir).zip ;;\
+	*.tar.zst*) \
+	  zstd -dc $(distdir).tar.zst | $(am__untar) ;;\
+	esac
+	chmod -R a-w $(distdir)
+	chmod u+w $(distdir)
+	mkdir $(distdir)/_build $(distdir)/_build/sub $(distdir)/_inst
+	chmod a-w $(distdir)
+	test -d $(distdir)/_build || exit 0; \
+	dc_install_base=`$(am__cd) $(distdir)/_inst && pwd | sed -e 's,^[^:\\/]:[\\/],/,'` \
+	  && dc_destdir="$${TMPDIR-/tmp}/am-dc-$$$$/" \
+	  && am__cwd=`pwd` \
+	  && $(am__cd) $(distdir)/_build/sub \
+	  && ../../configure \
+	    $(AM_DISTCHECK_CONFIGURE_FLAGS) \
+	    $(DISTCHECK_CONFIGURE_FLAGS) \
+	    --srcdir=../.. --prefix="$$dc_install_base" \
+	  && $(MAKE) $(AM_MAKEFLAGS) \
+	  && $(MAKE) $(AM_MAKEFLAGS) $(AM_DISTCHECK_DVI_TARGET) \
+	  && $(MAKE) $(AM_MAKEFLAGS) check \
+	  && $(MAKE) $(AM_MAKEFLAGS) install \
+	  && $(MAKE) $(AM_MAKEFLAGS) installcheck \
+	  && $(MAKE) $(AM_MAKEFLAGS) uninstall \
+	  && $(MAKE) $(AM_MAKEFLAGS) distuninstallcheck_dir="$$dc_install_base" \
+	        distuninstallcheck \
+	  && chmod -R a-w "$$dc_install_base" \
+	  && ({ \
+	       (cd ../.. && umask 077 && mkdir "$$dc_destdir") \
+	       && $(MAKE) $(AM_MAKEFLAGS) DESTDIR="$$dc_destdir" install \
+	       && $(MAKE) $(AM_MAKEFLAGS) DESTDIR="$$dc_destdir" uninstall \
+	       && $(MAKE) $(AM_MAKEFLAGS) DESTDIR="$$dc_destdir" \
+	            distuninstallcheck_dir="$$dc_destdir" distuninstallcheck; \
+	      } || { rm -rf "$$dc_destdir"; exit 1; }) \
+	  && rm -rf "$$dc_destdir" \
+	  && $(MAKE) $(AM_MAKEFLAGS) dist \
+	  && rm -rf $(DIST_ARCHIVES) \
+	  && $(MAKE) $(AM_MAKEFLAGS) distcleancheck \
+	  && cd "$$am__cwd" \
+	  || exit 1
+	$(am__post_remove_distdir)
+	@(echo "$(distdir) archives ready for distribution: "; \
+	  list='$(DIST_ARCHIVES)'; for i in $$list; do echo $$i; done) | \
+	  sed -e 1h -e 1s/./=/g -e 1p -e 1x -e '$$p' -e '$$x'
+distuninstallcheck:
+	@test -n '$(distuninstallcheck_dir)' || { \
+	  echo 'ERROR: trying to run $@ with an empty' \
+	       '$$(distuninstallcheck_dir)' >&2; \
+	  exit 1; \
+	}; \
+	$(am__cd) '$(distuninstallcheck_dir)' || { \
+	  echo 'ERROR: cannot chdir into $(distuninstallcheck_dir)' >&2; \
+	  exit 1; \
+	}; \
+	test `$(am__distuninstallcheck_listfiles) | wc -l` -eq 0 \
+	   || { echo "ERROR: files left after uninstall:" ; \
+	        if test -n "$(DESTDIR)"; then \
+	          echo "  (check DESTDIR support)"; \
+	        fi ; \
+	        $(distuninstallcheck_listfiles) ; \
+	        exit 1; } >&2
+distcleancheck: distclean
+	@if test '$(srcdir)' = . ; then \
+	  echo "ERROR: distcleancheck can only run from a VPATH build" ; \
+	  exit 1 ; \
+	fi
+	@test `$(distcleancheck_listfiles) | wc -l` -eq 0 \
+	  || { echo "ERROR: files left in build directory after distclean:" ; \
+	       $(distcleancheck_listfiles) ; \
+	       exit 1; } >&2
+check-am: all-am
+check: check-recursive
+all-am: Makefile config.h
+installdirs: installdirs-recursive
+installdirs-am:
+install: install-recursive
+install-exec: install-exec-recursive
+install-data: install-data-recursive
+uninstall: uninstall-recursive
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-recursive
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-recursive
+
+clean-am: clean-generic mostlyclean-am
+
+distclean: distclean-recursive
+	-rm -f $(am__CONFIG_DISTCLEAN_FILES)
+	-rm -f Makefile
+distclean-am: clean-am distclean-generic distclean-hdr distclean-tags
+
+dvi: dvi-recursive
+
+dvi-am:
+
+html: html-recursive
+
+html-am:
+
+info: info-recursive
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-recursive
+
+install-dvi-am:
+
+install-exec-am:
+
+install-html: install-html-recursive
+
+install-html-am:
+
+install-info: install-info-recursive
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-recursive
+
+install-pdf-am:
+
+install-ps: install-ps-recursive
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-recursive
+	-rm -f $(am__CONFIG_DISTCLEAN_FILES)
+	-rm -rf $(top_srcdir)/autom4te.cache
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-recursive
+
+mostlyclean-am: mostlyclean-generic
+
+pdf: pdf-recursive
+
+pdf-am:
+
+ps: ps-recursive
+
+ps-am:
+
+uninstall-am:
+
+.MAKE: $(am__recursive_targets) all install-am install-strip
+
+.PHONY: $(am__recursive_targets) CTAGS GTAGS TAGS all all-am \
+	am--refresh check check-am clean clean-cscope clean-generic \
+	cscope cscopelist-am ctags ctags-am dist dist-all dist-bzip2 \
+	dist-gzip dist-hook dist-lzip dist-shar dist-tarZ dist-xz \
+	dist-zip dist-zstd distcheck distclean distclean-generic \
+	distclean-hdr distclean-tags distcleancheck distdir \
+	distuninstallcheck dvi dvi-am html html-am info info-am \
+	install install-am install-data install-data-am install-dvi \
+	install-dvi-am install-exec install-exec-am install-html \
+	install-html-am install-info install-info-am install-man \
+	install-pdf install-pdf-am install-ps install-ps-am \
+	install-strip installcheck installcheck-am installdirs \
+	installdirs-am maintainer-clean maintainer-clean-generic \
+	mostlyclean mostlyclean-generic pdf pdf-am ps ps-am tags \
+	tags-am uninstall uninstall-am
+
+.PRECIOUS: Makefile
+
+
+# Shortcut targets to make it easier to run expensive tests.
+.PHONY: check-expensive
+check-expensive:
+	$(MAKE) check RUN_EXPENSIVE_TESTS=yes
+.PHONY: check-very-expensive
+check-very-expensive: check-expensive
+
+# Run syntax-check rules before creating a distribution tarball.
+.PHONY: run-syntax-check
+run-syntax-check: all
+	$(AM_V_GEN)test ! -d .git || $(MAKE) syntax-check
+
+# Arrange so that .tarball-version appears only in the distribution
+# tarball, and never in a checked-out repository.
+dist-hook: gen-ChangeLog run-syntax-check
+	$(AM_V_GEN)echo $(VERSION) > $(distdir)/.tarball-version
+.PHONY: gen-ChangeLog
+gen-ChangeLog:
+	$(AM_V_GEN)if test -d .git; then				\
+	  log_fix="$(srcdir)/build-aux/git-log-fix";			\
+	  test -e "$$log_fix"						\
+	    && amend_git_log="--amend=$$log_fix"			\
+	    || amend_git_log=;						\
+	  $(top_srcdir)/build-aux/gitlog-to-changelog			\
+	    $$amend_git_log --since=$(gen_start_date) > $(distdir)/cl-t && \
+	    { rm -f $(distdir)/ChangeLog &&				\
+	      mv $(distdir)/cl-t $(distdir)/ChangeLog; }		\
+	fi
+
+THANKS: THANKS.in Makefile.am .mailmap thanks-gen
+	$(AM_V_GEN)rm -f $@-t $@;					\
+	{								\
+	  $(prologue); echo;						\
+	  { perl -ne '/^$$/.../^$$/ and !/^$$/ and s/  +/\0/ and print'	\
+	      $(srcdir)/THANKS.in;					\
+	    git log --pretty=format:'%aN%x00%aE'			\
+	      | $(ASSORT) -u;						\
+	  } | $(srcdir)/thanks-gen					\
+	    | LC_ALL=en_US.UTF-8 sort -k1,1;				\
+	  echo;								\
+	  printf ';; %s\n' 'Local Variables:' 'coding: utf-8' End:;	\
+	} > $@-t && chmod a-w $@-t && mv $@-t $@
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/grep/Makefile.kmk b/src/grep/Makefile.kmk
new file mode 100644
index 0000000..4449e61
--- /dev/null
+++ b/src/grep/Makefile.kmk
@@ -0,0 +1,267 @@
+# $Id: Makefile.kmk 3548 2022-01-29 02:41:10Z bird $
+## @file
+# Sub-Makefile for kmk_grep.
+#
+
+#
+# Copyright (c) 2006-2010 knut st. osmundsen <bird-kBuild-spamx@anduin.net>
+#
+# This file is part of kBuild.
+#
+# kBuild is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# kBuild is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with kBuild.  If not, see <http://www.gnu.org/licenses/>
+#
+#
+
+SUB_DEPTH = ../..
+include $(KBUILD_PATH)/subheader.kmk
+
+#
+# Grep uses C99 syntax, which isn't supported by older microsoft compilers,
+# so select a newer one if needed and do static linking.
+#
+TEMPLATE_BINC99 = Accept C99 syntax
+TEMPLATE_BINC99_EXTENDS = BIN
+if1of ($(KBUILD_TARGET), win nt)
+ ifeq ($(TEMPLATE_BIN_TOOL),VCC100)
+  TEMPLATE_BINC99_TOOL            = VCC142
+  TEMPLATE_BINC99_TOOL.x86        = VCC142X86
+  TEMPLATE_BINC99_TOOL.amd64      = VCC142AMD64
+  TEMPLATE_BINC99_SDKS            = WINSDK10-UM WINSDK10-UCRT-STATIC
+  TEMPLATE_BINC99_CFLAGS          = $(filter-out -MD,$(TEMPLATE_BIN_CFLAGS)) -MT -Gy -Gw -Zc:inline
+  TEMPLATE_BINC99_LDFLAGS         = $(TEMPLATE_BIN_LDFLAGS) /OPT:REF
+  TEMPLATE_BINC99_LIBS            = \
+  	$(PATH_TOOL_$(TEMPLATE_BINC99_TOOL)_LIB.$(KBUILD_TARGET_ARCH))/vcruntime.lib \
+  	$(PATH_TOOL_$(TEMPLATE_BINC99_TOOL)_LIB.$(KBUILD_TARGET_ARCH))/oldnames.lib \
+  	$(PATH_TOOL_$(TEMPLATE_BINC99_TOOL)_LIB.$(KBUILD_TARGET_ARCH))/libcmt.lib \
+  	$(PATH_TOOL_$(TEMPLATE_BINC99_TOOL)_LIB.$(KBUILD_TARGET_ARCH))/libcpmt.lib
+  TEMPLATE_BINC99_LIBS.x86        = $(NO_SUCH_VARIABLE)
+  TEMPLATE_BINC99_LIBS.amd64      = $(NO_SUCH_VARIABLE)
+ endif
+endif
+
+#
+# kmk_grep
+#
+PROGRAMS += kmk_grep
+kmk_grep_TEMPLATE = BINC99
+kmk_grep_DEFS = \
+	KMK_GREP \
+	HAVE_CONFIG_H
+kmk_grep_CFLAGS.solaris = -std=gnu99
+kmk_grep_CFLAGS.win += -wd4018 # grep.c(797): warning C4018: '<': signed/unsigned mismatch [lots of size_t / ptrdiff_t mixups]
+kmk_grep_CFLAGS.win += -wd4244 # grep.c(1423): warning C4244: '=': conversion from '__int64' to 'off_t', possible loss of data
+kmk_grep_CFLAGS.win += -wd4267 # grep.c(2303): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
+kmk_grep_CFLAGS.win += -wd4146 # fnmatch_loop.c(1067): warning C4146: unary minus operator applied to unsigned type, result still unsigned
+kmk_grep_CFLAGS.win += -wd4308 # fnmatch_loop.c(1067): warning C4308: negative integral constant converted to unsigned type
+ifdef KBUILD_SOLARIS_10
+ kmk_grep_CFLAGS += -std=gnu99
+endif
+kmk_grep_INCS = \
+	$(kmk_grep_0_OUTDIR) \
+	. \
+	lib
+kmk_grep_SOURCES = \
+	src/grep.c \
+	src/dfasearch.c \
+	src/kwsearch.c \
+	src/kwset.c \
+	src/searchutils.c \
+       \
+	lib/regex.c \
+	lib/dfa.c \
+       \
+	lib/getopt1.c \
+	lib/getopt.c \
+       \
+	lib/xalloc-die.c \
+	lib/xmalloc.c \
+       lib/reallocarray.c \
+	lib/obstack.c \
+       lib/c-stack.c \
+       lib/malloc/dynarray_resize.c \
+       \
+       lib/stripslash.c \
+       lib/argmatch.c \
+       lib/quotearg.c \
+       lib/exclude.c \
+       lib/fnmatch.c \
+       lib/hash.c \
+       lib/error.c \
+       \
+       lib/openat-safer.c \
+       lib/fd-safer.c \
+       lib/fd-safer-flag.c \
+       lib/dup-safer.c \
+       lib/dup-safer-flag.c \
+       lib/closeout.c \
+       lib/close-stream.c \
+       lib/fpending.c \
+       lib/safe-read.c \
+       \
+       lib/c-strcasecmp.c \
+       lib/localeinfo.c \
+       lib/localcharset.c \
+       lib/mbchar.c \
+       lib/mbscasecmp.c \
+	lib/memrchr.c \
+	lib/memchr2.c \
+       lib/wmempcpy.c \
+       lib/strnlen1.c \
+       lib/xstrtoimax.c \
+       \
+       lib/exitfail.c \
+       lib/version-etc.c \
+       lib/version-etc-fsf.c \
+
+kmk_grep_SOURCES.win = \
+	lib/w32-initialize-main.c \
+	lib/colorize-w32.c \
+	lib/basename-lgpl.c \
+	lib/getpagesize.c \
+	lib/getprogname-w32.c \
+	lib/xbinary-io.c \
+       lib/strerror.c \
+       \
+	../lib/get_codepage.c \
+	../lib/nt/ntstat.c \
+	../lib/nt/ntdir.c \
+	../lib/nt/nthlpcore.c \
+	../lib/nt/nthlpfs.c \
+	../lib/nt/ntopenat.c \
+	../lib/nt/fts-nt.c
+
+#TODO use:	../lib/startuphacks-win.c
+
+#
+# We generate a few files.
+#
+kmk_grep_DEPS = \
+	$(kmk_grep_0_OUTDIR)/config.h \
+	$(kmk_grep_0_OUTDIR)/configmake.h
+kmk_grep_DEPS.win = \
+	$(kmk_grep_0_OUTDIR)/getopt-cdefs.h \
+	$(kmk_grep_0_OUTDIR)/getopt.h \
+	$(kmk_grep_0_OUTDIR)/unistd.h \
+	$(kmk_grep_0_OUTDIR)/sigsegv.h \
+	$(kmk_grep_0_OUTDIR)/fnmatch.h
+
+kmk_grep_CLEAN = $(kmk_grep_DEPS)
+kmk_grep_CLEAN.win = $(kmk_grep_DEPS.win) $(kmk_grep_LNK_DEPS.win)
+
+# Use checked in config.h instead of running ./configure for it.
+$$(kmk_grep_0_OUTDIR)/config.h: $(PATH_SUB_CURRENT)/config.$(KBUILD_TARGET).h | $$(call DIRDEP,$$(kmk_grep_0_OUTDIR))
+	$(CP) -f -- "$^" "$@"
+
+# This shouldn't be used with NLS disabled, so the paths doesn't matter I hope.
+$$(kmk_grep_0_OUTDIR)/configmake.h: $(MAKEFILE_CURRENT) | $$(call DIRDEP,$$(kmk_grep_0_OUTDIR))
+	$(APPEND) -tn "$@" \
+		'#define PREFIX         "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define EXEC_PREFIX    "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define BINDIR         "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define SBINDIR        "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define LIBEXECDIR     "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define DATAROOTDIR    "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define DATADIR        "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define SYSCONFDIR     "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define SHAREDSTATEDIR "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define LOCALSTATEDIR  "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define RUNSTATEDIR    "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define INCLUDEDIR     "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define OLDINCLUDEDIR  "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define DOCDIR         "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define INFODIR        "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define HTMLDIR        "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define DVIDIR         "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define PDFDIR         "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define PSDIR          "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define LIBDIR         "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define LISPDIR        "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define LOCALEDIR      "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define MANDIR         "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define MANEXT         "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define PKGDATADIR     "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define PKGINCLUDEDIR  "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define PKGLIBDIR      "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"'; \
+		'#define PKGLIBEXECDIR  "kBuild/bin/$(KBUILD_TARGET).$(KBUILD_TARGET_ARCH)/"';
+
+# Windows needs a few more things:
+$$(kmk_grep_0_OUTDIR)/getopt-cdefs.h: $(PATH_SUB_CURRENT)/lib/getopt-cdefs.in.h \
+		$(MAKEFILE_CURRENT) | $$(call DIRDEP,$$(kmk_grep_0_OUTDIR))
+	$(SED) \
+       	-e 's,@HAVE_SYS_CDEFS_H@,0,' \
+               --output "$@" \
+               $(qdeps sh,$@,1)
+
+$$(kmk_grep_0_OUTDIR)/getopt.h: $(PATH_SUB_CURRENT)/lib/getopt.in.h \
+		$(MAKEFILE_CURRENT) | $$(call DIRDEP,$$(kmk_grep_0_OUTDIR))
+	$(SED) \
+       	-e 's,@GUARD_PREFIX@,GNULIB,' \
+       	-e '/@PRAGMA_SYSTEM_HEADER@/d' \
+       	-e '/@PRAGMA_COLUMNS@/d' \
+       	-e 's,@HAVE_SYS_CDEFS_H@,0,' \
+       	-e '/@INCLUDE_NEXT@/d' \
+       	-e '/@NEXT_GETOPT_H@/d' \
+       	-e 's,@HAVE_GETOPT_H@,0,' \
+               --output "$@" \
+               $(qdeps sh,$@,1)
+
+$$(kmk_grep_0_OUTDIR)/fnmatch.h: $(PATH_SUB_CURRENT)/lib/fnmatch.in.h \
+		$(MAKEFILE_CURRENT) | $$(call DIRDEP,$$(kmk_grep_0_OUTDIR))
+	$(SED) \
+       	-e 's,@GUARD_PREFIX@,GNULIB,' \
+       	-e '/@PRAGMA_SYSTEM_HEADER@/d' \
+       	-e '/@PRAGMA_COLUMNS@/d' \
+       	-e 's,@HAVE_FNMATCH_H@,0,' \
+       	-e 's,@REPLACE_FNMATCH@,0,' \
+       	-e 's,@GNULIB_FNMATCH@,1,' \
+       	-e 's,@HAVE_FNMATCH@,0,' \
+       	-e '/@INCLUDE_NEXT@/d' \
+               --output "$@" \
+               $(qdeps sh,$@,1)
+
+$$(kmk_grep_0_OUTDIR)/unistd.h: $(MAKEFILE_CURRENT) | $$(call DIRDEP,$$(kmk_grep_0_OUTDIR))
+	$(APPEND) -tn "$@" \
+		'extern int getpagesize(void);' \
+		'extern int fchdir(int);'
+
+$$(kmk_grep_0_OUTDIR)/sigsegv.h: $(PATH_SUB_CURRENT)/lib/sigsegv.in.h | $$(call DIRDEP,$$(kmk_grep_0_OUTDIR))
+	$(CP) -f -- "$^" "$@"
+
+ifndef KBUILD_NEW_VCC # Add a manifest making UTF-8 as the active code page.
+kmk_grep_LNK_DEPS.win = \
+	$(kmk_grep_0_OUTDIR)/kmk_grep.manifest
+
+$$(kmk_grep_0_OUTDIR)/kmk_grep.manifest: $(MAKEFILE_CURRENT) | $$(call DIRDEP,$$(kmk_grep_0_OUTDIR))
+	$(APPEND) -tn "$@" \
+		'<?xml version="1.0" encoding="UTF-8" standalone="yes"?>' \
+		'<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">' \
+		'  <assemblyIdentity type="win32" name="kmk_grep.exe" version="3.7.0.0"/>' \
+		'  <application>' \
+		'    <windowsSettings>' \
+		'      <activeCodePage xmlns="http://schemas.microsoft.com/SMI/2019/WindowsSettings">UTF-8</activeCodePage>' \
+		'    </windowsSettings>' \
+		'  </application>' \
+		'</assembly>'
+
+# HACK ALERT! Using kmk_builting_redirect here to bypass some shell quoting
+#             issue.  Also, no idea why we need to escape the hash (\#1).
+kmk_grep_POST_CMDS.win = \
+	$(REDIRECT) -- $(PATH_SDK_WINSDK10-UM_BIN)/mt.exe \
+		-manifest "$(subst /,\\,$(kmk_grep_0_OUTDIR)/kmk_grep.manifest)" \
+		'-outputresource:$(subst /,\\,$(out));\#1'
+endif
+
+
+include $(FILE_KBUILD_SUB_FOOTER)
+
diff --git a/src/grep/NEWS b/src/grep/NEWS
new file mode 100644
index 0000000..94c8a39
--- /dev/null
+++ b/src/grep/NEWS
@@ -0,0 +1,1290 @@
+GNU grep NEWS                                    -*- outline -*-
+
+* Noteworthy changes in release 3.7 (2021-08-14) [stable]
+
+** Changes in behavior
+
+  Use of the --unix-byte-offsets (-u) option now evokes a warning.
+  Since 3.1, this Windows-only option has had no effect.
+
+** Bug fixes
+
+  Preprocessing N patterns would take at least O(N^2) time when too many
+  patterns hashed to too few buckets. This now takes seconds, not days:
+  : | grep -Ff <(seq 6400000 | tr 0-9 A-J)
+  [Bug#44754 introduced in grep 3.5]
+
+
+* Noteworthy changes in release 3.6 (2020-11-08) [stable]
+
+** Changes in behavior
+
+  The GREP_OPTIONS environment variable no longer affects grep's behavior.
+  The variable was declared obsolescent in grep 2.21 (2014), and since
+  then any use had caused grep to issue a diagnostic.
+
+** Bug fixes
+
+  grep's DFA matcher performed an invalid regex transformation
+  that would convert an ERE like a+a+a+ to a+a+, which would make
+  grep a+a+a+ mistakenly match "aa".
+  [Bug#44351 introduced in grep 3.2]
+
+  grep -P now reports the troublesome input filename upon PCRE execution
+  failure.  Before, searching many files for something rare might fail with
+  just "exceeded PCRE's backtracking limit".  Now, it also reports which file
+  triggered the failure.
+
+
+* Noteworthy changes in release 3.5 (2020-09-27) [stable]
+
+** Changes in behavior
+
+  The message that a binary file matches is now sent to standard error
+  and the message has been reworded from "Binary file FOO matches" to
+  "grep: FOO: binary file matches", to avoid confusion with ordinary
+  output or when file names contain spaces and the like, and to be
+  more consistent with other diagnostics.  For example, commands
+  like 'grep PATTERN FILE | wc' no longer add 1 to the count of
+  matching text lines due to the presence of the message.  Like other
+  stderr messages, the message is now omitted if the --no-messages
+  (-s) option is given.
+
+  Two other stderr messages now use the typical form too.  They are
+  now "grep: FOO: warning: recursive directory loop" and "grep: FOO:
+  input file is also the output".
+
+  The --files-without-match (-L) option has reverted to its behavior
+  in grep 3.1 and earlier.  That is, grep -L again succeeds when a
+  line is selected, not when a file is listed.  The behavior in grep
+  3.2 through 3.4 was causing compatibility problems.
+
+** Bug fixes
+
+  grep -I no longer issues a spurious "Binary file FOO matches" line.
+  [Bug#33552 introduced in grep 2.23]
+
+  In UTF-8 locales, grep -w no longer ignores a multibyte word
+  constituent just before what would otherwise be a word match.
+  [Bug#43225 introduced in grep 2.28]
+
+  grep -i no longer mishandles ASCII characters that match multibyte
+  characters.  For example, 'LC_ALL=tr_TR.utf8 grep -i i' no longer
+  dumps core merely because 'i' matches 'İ' (U+0130 LATIN CAPITAL
+  LETTER I WITH DOT ABOVE) in Turkish when ignoring case.
+  [Bug#43577 introduced partly in grep 2.28 and partly in grep 3.4]
+
+  A performance regression with -E and many patterns has been mostly fixed.
+  "Mostly" as there is a performance tradeoff between Bug#22357 and Bug#40634.
+  [Bug#40634 introduced in grep 2.28]
+
+  A performance regression with many duplicate patterns has been fixed.
+  [Bug#43040 introduced in grep 3.4]
+
+  An N^2 RSS performance regression with many patterns has been fixed
+  in common cases (no backref, and no use of -o or --color).
+  With only 80,000 lines of /usr/share/dict/linux.words, the following
+  would use 100GB of RSS and take 3 minutes. With the fix, it used less
+  than 400MB and took less than one second:
+    head -80000 /usr/share/dict/linux.words > w; grep -vf w w
+  [Bug#43527 introduced in grep 3.4]
+
+** Build-related
+
+  "make dist" builds .tar.gz files again, as they are still used in
+  some barebones builds.
+
+
+* Noteworthy changes in release 3.4 (2020-01-02) [stable]
+
+** New features
+
+  The new --no-ignore-case option causes grep to observe case
+  distinctions, overriding any previous -i (--ignore-case) option.
+
+** Bug fixes
+
+  '.' no longer matches some invalid byte sequences in UTF-8 locales.
+  [bug introduced in grep 2.7]
+
+  grep -Fw can no longer false match in non-UTF-8 multibyte locales
+  For example, this command would erroneously print its input line:
+    echo ab | LC_CTYPE=ja_JP.eucjp grep -Fw b
+  [Bug#38223 introduced in grep 2.28]
+
+  The exit status of 'grep -L' is no longer incorrect when standard
+  output is /dev/null.
+  [Bug#37716 introduced in grep 3.2]
+
+  A performance bug has been fixed when grep is given many patterns,
+  each with no back-reference.
+  [Bug#33249 introduced in grep 2.5]
+
+  A performance bug has been fixed for patterns like '01.2' that
+  cause grep to reorder tokens internally.
+  [Bug#34951 introduced in grep 3.2]
+
+** Build-related
+
+  The build procedure no longer relies on any already-built src/grep
+  that might be absent or broken.  Instead, it uses the system 'grep'
+  to bootstrap, and uses src/grep only to test the build.  On Solaris
+  /usr/bin/grep is broken, but you can install GNU or XPG4 'grep' from
+  the standard Solaris distribution before building GNU Grep yourself.
+  [bug introduced in grep 2.8]
+
+
+* Noteworthy changes in release 3.3 (2018-12-20) [stable]
+
+** Bug fixes
+
+  Some uses of \b in the C locale and with the DFA matcher would fail, e.g.,
+  the following would print nothing (it should print the input line):
+    echo 123-x|LC_ALL=C grep '.\bx'
+  Using a multibyte locale, using certain regexp constructs (some ranges,
+  back-references), or forcing use of the PCRE matcher via --perl-regexp (-P)
+  would avoid the bug.
+  [bug introduced in grep 3.2]
+
+
+* Noteworthy changes in release 3.2 (2018-12-20) [stable]
+
+** Changes in behavior
+
+  The --files-without-match (-L) option now causes grep to succeed
+  when a file is listed, instead of when a line is selected.  This
+  resembles what git-grep does.
+
+** Bug fixes
+
+  The --recursive (-r) option no longer fails on MS-Windows.
+  [bug introduced in grep 2.11]
+
+** Improvements
+
+  An over-30x performance improvement when many 'or'd expressions
+  share a common prefix, thanks to improvements in gnulib's dfa.c,
+  by Norihiro Tanaka.  See gnulib commits v0.1-2110-ge648401be,
+  v0.1-2111-g4299106ce, v0.1-2117-g617a60974
+
+  An additional 3-23% speed-up when searching large files, via
+  increased initial buffer size.
+
+  grep now diagnoses stack overflow.  Before grep-2.6, the included
+  regexp code would detect it.  Since 2.6, grep defaulted to using
+  glibc's regexp, which lost that capability.
+
+
+* Noteworthy changes in release 3.1 (2017-07-02) [stable]
+
+** Improvements
+
+  grep '[0-9]' is now just as fast as grep '[[:digit:]]' when run
+  in a multi-byte locale.  Before, it was several times slower.
+
+** Changes in behavior
+
+  Context no longer excludes selected lines omitted because of -m.
+  For example, 'grep "^" -m1 -A1' now outputs the first two input
+  lines, not just the first line.  This fixes a glitch that has been
+  present since -m was added in grep 2.5.
+
+  The following changes affect only MS-Windows platforms.  First, the
+  --binary (-U) option now governs whether binary I/O is used, instead
+  of a heuristic that was sometimes incorrect.  Second, the
+  --unix-byte-offsets (-u) option now has no effect on MS-Windows too.
+
+
+* Noteworthy changes in release 3.0 (2017-02-09) [stable]
+
+** Bug fixes
+
+  grep without -F no longer goes awry when given two or more patterns
+  that contain no special characters other than '\' and also contain a
+  subpattern like '\.' that escapes a character to make it ordinary.
+  [bug introduced in grep 2.28]
+
+  grep no longer fails to build on PCRE versions before 8.20.
+  [bug introduced in grep 2.28]
+
+
+* Noteworthy changes in release 2.28 (2017-02-06) [stable]
+
+** Bug fixes
+
+  When grep -Fo finds matches of differing length, it could
+  mistakenly print a shorter one.  Now it prints a longest one.
+  [bug introduced in grep-2.26]
+
+  When standard output is /dev/null, grep no longer fails when
+  standard input is a file in the Linux /proc file system, or when
+  standard input is a pipe and standard output is in append mode.
+  [bugs introduced in grep-2.27]
+
+  Fix performance regression with multiple patterns, e.g., for -Fi in
+  a multi-byte locale, or for -Fw in a single-byte locale.
+  [bugs introduced in grep-2.19, grep-2.22 and grep-2.26]
+
+** Improvements
+
+  Improve performance for -E or -G pattern lists that are easily
+  converted to -F format.
+
+
+* Noteworthy changes in release 2.27 (2016-12-06) [stable]
+
+** Bug fixes
+
+  grep no longer reports a false match in a multibyte, non-UTF8 locale
+  like zh_CN.gb18030, with a regular expression like ".*7" that just
+  happens to match the 4-byte representation of gb18030's \uC9, the
+  final byte of which is the digit "7".
+  [bug introduced in grep-2.19]
+
+  Unless an early-exit option like -q, -l, -L, -m, or -f /dev/null is
+  specified, grep now reads all of a non-seekable standard input,
+  even if this cannot affect grep's output or exit status.  This works
+  better with nonportable scripts that run "PROGRAM | grep PATTERN
+  >/dev/null" where PROGRAM dies when writing into a broken pipe.
+  [bug introduced in grep-2.26]
+
+  grep no longer mishandles ranges in nontrivial unibyte locales.
+  [bug introduced in grep-2.26]
+
+  grep -P no longer attempts multiline matches.  This works more
+  intuitively with unusual patterns, and means that grep -Pz no longer
+  rejects patterns containing ^ and $ and works when combined with -x.
+  [bugs introduced in grep-2.23] A downside is that grep -P is now
+  significantly slower, albeit typically still faster than pcregrep.
+
+  grep -m0 -L PAT FILE now outputs "FILE".  [bug introduced in grep-2.5]
+
+  To output ':' and tab-align the following character C, grep -T no
+  longer outputs tab-backspace-':'-C, an approach that has problems if
+  run inside an Emacs shell window.  [bug introduced in grep-2.5.2]
+
+  grep -T now uses worst-case widths of line numbers and byte offsets
+  instead of guessing widths that might not work with larger files.
+  [bug introduced in grep-2.5.2]
+
+  grep's use of getprogname no longer causes a build failure on HP-UX.
+
+** Improvements
+
+  grep no longer reads the input in a few more cases when it is easy
+  to see that matching cannot succeed, e.g., 'grep -f /dev/null'.
+
+
+* Noteworthy changes in release 2.26 (2016-10-02) [stable]
+
+** Bug fixes
+
+  Grep no longer omits output merely because it follows an output line
+  suppressed due to encoding errors.  [bug introduced in grep-2.21]
+
+  In the Shift_JIS locale, grep no longer mistakenly matches in the
+  middle of a multibyte character. [bug present since "the beginning"]
+
+** Improvements
+
+  grep can be much faster now when standard output is /dev/null.
+
+  grep -F is now typically much faster when many patterns are given,
+  as it now uses the Aho-Corasick algorithm instead of the
+  Commentz-Walter algorithm in that case.
+
+  grep -iF is typically much faster in a multibyte locale, if the
+  pattern and its case counterparts contain only single byte characters.
+
+  grep with complicated expressions (e.g., back-references) and without
+  -i now uses the regex fastmap for better performance.
+
+  In multibyte locales, grep now handles leading "." in patterns more
+  efficiently.
+
+  grep now prints a "FILENAME:LINENO: " prefix when diagnosing an
+  invalid regular expression that was read from an '-f'-specified file.
+
+
+* Noteworthy changes in release 2.25 (2016-04-21) [stable]
+
+** Bug fixes
+
+  In the C or POSIX locale, grep now treats all bytes as valid
+  characters even if the C runtime library says otherwise.  The
+  revised behavior is more compatible with the original intent of
+  POSIX, and the next release of POSIX will likely make this official.
+  [bug introduced in grep-2.23]
+
+  grep -Pz no longer mistakenly diagnoses patterns like [^a] that use
+  negated character classes. [bug introduced in grep-2.24]
+
+  grep -oz now uses null bytes, not newlines, to terminate output lines.
+  [bug introduced in grep-2.5]
+
+** Improvements
+
+  grep now outputs details more consistently when reporting a write error.
+  E.g., "grep: write error: No space left on device" rather than just
+  "grep: write error".
+
+
+* Noteworthy changes in release 2.24 (2016-03-10) [stable]
+
+** Bug fixes
+
+  grep -z would match strings it should not.  To trigger the bug, you'd
+  have to use a regular expression including an anchor (^ or $) and a
+  feature like a range or a back-reference, causing grep to forego its DFA
+  matcher and resort to using re_search.  With a multibyte locale, that
+  matcher could mistakenly match a string containing a newline.
+  For example, this command:
+    printf 'a\nb\0' | LC_ALL=en_US.utf-8 grep -z '^[a-b]*b'
+  would mistakenly match and print all four input bytes.  After the fix,
+  there is no match, as expected.
+  [bug introduced in grep-2.7]
+
+  grep -Pz now diagnoses attempts to use patterns containing ^ and $,
+  instead of mishandling these patterns.  This problem seems to be
+  inherent to the PCRE API; removing this limitation is on PCRE's
+  maint/README wish list.  Patterns can continue to match literal ^
+  and $ by escaping them with \ (now needed even inside [...]).
+  [bug introduced in grep-2.5]
+
+
+* Noteworthy changes in release 2.23 (2016-02-04) [stable]
+
+** Bug fixes
+
+  Binary files are now less likely to generate diagnostics and more
+  likely to yield text matches.  grep now reports "Binary file FOO
+  matches" and suppresses further output instead of outputting a line
+  containing an encoding error; hence grep can now report matching text
+  before a later binary match.  Formerly, grep reported FOO to be
+  binary when it found an encoding error in FOO before generating
+  output for FOO, which meant it never reported both matching text and
+  matching binary data; this was less useful for searching text
+  containing encoding errors in non-matching lines.
+  [bug introduced in grep-2.21]
+
+  grep -c no longer stops counting when finding binary data.
+  [bug introduced in grep-2.21]
+
+  grep no longer outputs encoding errors in unibyte locales.
+  For example, if the byte '\x81' is not a valid character in a
+  unibyte locale, grep treats the byte as binary data.
+  [bug introduced in grep-2.21]
+
+  grep -oP is no longer susceptible to an infinite loop when processing
+  invalid UTF8 just before a match.
+  [bug introduced in grep-2.22]
+
+  --exclude and related options are now matched against trailing
+  parts of command-line arguments, not against the entire arguments.
+  This partly reverts the --exclude-related change in 2.22.
+  [bug introduced in grep-2.22]
+
+  --line-buffer is no longer ineffective when combined with -l.
+  [bug introduced in grep-2.5]
+
+  -xw is now equivalent to -x more consistently, with -P and with backrefs.
+  [bug only partially fixed in grep-2.19]
+
+
+* Noteworthy changes in release 2.22 (2015-11-01) [stable]
+
+** Improvements
+
+  Performance has improved for patterns containing very long strings,
+  reducing preprocessing time for an N-byte regexp from O(N^2) to
+  only slightly superlinear for most patterns.  Before, a command like
+  the following would take over a minute, but now, it takes less than
+  a second:
+  : | grep -f <(seq -s '' 99999)
+
+  When building grep, 'configure' now uses PCRE's pkg-config module for
+  configuration information, rather than attempting to guess it by hand.
+
+** Bug fixes
+
+  A DFA matcher bug made this command mistakenly print its input line:
+    echo axb | grep -E '^x|x$'
+  Likewise for this equivalent command:
+    echo axb | grep -e '^x' -e 'x$'
+  [bug introduced in grep-2.19 ]
+
+  grep no longer reads from uninitialized memory or from beyond the end
+  of the heap-allocated input buffer.  This fix addressed CVE-2015-1345.
+  [bug introduced in grep-2.19 ]
+
+  With -z, '.' and '[^x]' in a pattern now consistently match newline.
+  Previously, they sometimes matched newline, and sometimes did not.
+  [bug introduced in grep-2.4]
+
+  When the JIT stack is exhausted, grep -P now grows the stack rather
+  than reporting an internal PCRE error.
+
+  'grep -D skip PATTERN FILE' no longer hangs if FILE is a fifo.
+  [bug introduced in grep-2.12]
+
+  --exclude and related options are now matched against entire
+  command-line arguments, not against command-line components.
+  [bug introduced in grep-2.6]
+
+  Fix performance degradation of grep -Fw in unibyte locales.
+  [bug introduced in grep-2.19 ]
+
+
+* Noteworthy changes in release 2.21 (2014-11-23) [stable]
+
+** Improvements
+
+  Performance has been greatly improved for searching files containing
+  holes, on platforms where lseek's SEEK_DATA flag works efficiently.
+
+  Performance has improved for rejecting data that cannot match even
+  the first part of a nontrivial pattern.
+
+  Performance has improved for very long strings in patterns.
+
+  If a file contains data improperly encoded for the current locale,
+  and this is discovered before any of the file's contents are output,
+  grep now treats the file as binary.
+
+  grep -P no longer reports an error and exits when given invalid UTF-8 data.
+  Instead, it considers the data to be non-matching.
+
+** Bug fixes
+
+  grep no longer mishandles patterns that contain \w or \W in multibyte
+  locales.
+
+  grep would fail to count newlines internally when operating in non-UTF8
+  multibyte locales, leading it to print potentially many lines that did
+  not match.  E.g., the command, "seq 10 | env LC_ALL=zh_CN src/grep -n .."
+  would print this:
+  1:1
+  2
+  3
+  4
+  5
+  6
+  7
+  8
+  9
+  10
+  implying that the match, "10" was on line 1.
+  [bug introduced in grep-2.19]
+
+  grep -F -x -o no longer prints an extra newline for each match.
+  [bug introduced in grep-2.19]
+
+  grep in a non-UTF8 multibyte locale could mistakenly match in the middle
+  of a multibyte character when using a '^'-anchored alternate in a pattern,
+  leading it to print non-matching lines.  [bug present since "the beginning"]
+
+  grep -F Y no longer fails to match in non-UTF8 multibyte locales like
+  Shift-JIS, when the input contains a 2-byte character, XY, followed by
+  the single-byte search pattern, Y.  grep would find the first, middle-
+  of-multibyte matching "Y", and then mistakenly advance an internal
+  pointer one byte too far, skipping over the target "Y" just after that.
+  [bug introduced in grep-2.19]
+
+  grep -E rejected unmatched ')', instead of treating it like '\)'.
+  [bug present since "the beginning"]
+
+  On NetBSD, grep -r no longer reports "Inappropriate file type or format"
+  when refusing to follow a symbolic link.
+  [bug introduced in grep-2.12]
+
+** Changes in behavior
+
+  The GREP_OPTIONS environment variable is now obsolescent, and grep
+  now warns if it is used.  Please use an alias or script instead.
+
+  In locales with multibyte character encodings other than UTF-8,
+  grep -P now reports an error and exits instead of misbehaving.
+
+  When searching binary data, grep now may treat non-text bytes as
+  line terminators.  This can boost performance significantly.
+
+  grep -z no longer automatically treats the byte '\200' as binary data.
+
+* Noteworthy changes in release 2.20 (2014-06-03) [stable]
+
+** Bug fixes
+
+  grep --max-count=N FILE would no longer stop reading after the Nth match.
+  I.e., while grep would still print the correct output, it would continue
+  reading until end of input, and hence, potentially forever.
+  [bug introduced in grep-2.19]
+
+  A command like echo aa|grep -E 'a(b$|c$)' would mistakenly
+  report the input as a matched line.
+  [bug introduced in grep-2.19]
+
+** Changes in behavior
+
+  grep --exclude-dir='FOO/' now excludes the directory FOO.
+  Previously, the trailing slash meant the option was ineffective.
+
+
+* Noteworthy changes in release 2.19 (2014-05-22) [stable]
+
+** Improvements
+
+  Performance has improved, typically by 10% and in some cases by a
+  factor of 200.  However, performance of grep -P in UTF-8 locales has
+  gotten worse as part of the fix for the crashes mentioned below.
+
+** Bug fixes
+
+  grep no longer mishandles patterns like [a-[.z.]], and no longer
+  mishandles patterns like [^a] in locales that have multicharacter
+  collating sequences so that [^a] can match a string of two characters.
+
+  grep no longer mishandles an empty pattern at the end of a pattern list.
+  [bug introduced in grep-2.5]
+
+  grep -C NUM now outputs separators consistently even when NUM is zero,
+  and similarly for grep -A NUM and grep -B NUM.
+  [bug present since "the beginning"]
+
+  grep -f no longer mishandles patterns containing NUL bytes.
+  [bug introduced in grep-2.11]
+
+  Plain grep, grep -E, and grep -F now treat encoding errors in patterns
+  the same way the GNU regular expression matcher treats them, with respect
+  to whether the errors can match parts of multibyte characters in data.
+  [bug present since "the beginning"]
+
+  grep -w no longer mishandles a potential match adjacent to a letter that
+  takes up two or more bytes in a multibyte encoding.
+  Similarly, the patterns '\<', '\>', '\b', and '\B' no longer
+  mishandle word-boundary matches in multibyte locales.
+  [bug present since "the beginning"]
+
+  grep -P now reports an error and exits when given invalid UTF-8 data.
+  Previously it was unreliable, and sometimes crashed or looped.
+  [bug introduced in grep-2.16]
+
+  grep -P now works with -w and -x and back-references. Before,
+  echo aa|grep -Pw '(.)\1' would fail to match, yet
+  echo aa|grep -Pw '(.)\2' would match.
+
+  grep -Pw now works like grep -w in that the matched string has to be
+  preceded and followed by non-word components or the beginning and end
+  of the line (as opposed to word boundaries before).  Before, this
+  echo a@@a| grep -Pw @@ would match, yet this
+  echo a@@a| grep -w @@ would not.  Now, they both fail to match,
+  per the documentation on how grep's -w works.
+
+  grep -i no longer mishandles patterns containing titlecase characters.
+  For example, in a locale containing the titlecase character
+  'Lj' (U+01C8 LATIN CAPITAL LETTER L WITH SMALL LETTER J),
+  'grep -i Lj' now matches both 'LJ' (U+01C7 LATIN CAPITAL LETTER LJ)
+  and 'lj' (U+01C9 LATIN SMALL LETTER LJ).
+
+
+* Noteworthy changes in release 2.18 (2014-02-20) [stable]
+
+** Bug fixes
+
+  grep no longer mishandles patterns like [^^-~] in unibyte locales.
+  [bug introduced in grep-2.8]
+
+  grep -i in a multibyte, non-UTF8 locale could be up to 200 times slower
+  than in 2.16.  [bug introduced in grep-2.17]
+
+
+* Noteworthy changes in release 2.17 (2014-02-17) [stable]
+
+** Improvements
+
+  grep -i in a multibyte locale is now typically 10 times faster
+  for patterns that do not contain \ or [.
+
+  grep (without -i) in a multibyte locale is now up to 7 times faster
+  when processing many matched lines.
+
+** Maintenance
+
+  grep's --mmap option was disabled in March of 2010, and began to
+  elicit a warning in January of 2012.  Now it is completely gone.
+
+
+* Noteworthy changes in release 2.16 (2014-01-01) [stable]
+
+** Bug fixes
+
+  Fix gnulib-provided maint.mk so that the release procedure described
+  in README-release actually does what we want.  Before that fix, that
+  procedure resulted in a grep-2.15 tarball that would lead to a grep
+  binary whose --version-reported version number was 2.14.51...
+
+  The fix to make \s and \S work with multi-byte white space broke
+  the use of each shortcut whenever followed by a repetition operator.
+  For example, \s*, \s+, \s? and \s{3} would all malfunction in a
+  multi-byte locale.  [bug introduced in grep-2.15]
+
+  The fix to make grep -P work better with UTF-8 made it possible for
+  grep to evoke a larger set of PCRE errors, some of which could trigger
+  an abort.  E.g., this would abort:
+    printf '\x82'|LC_ALL=en_US.UTF-8 grep -P y
+  Now grep handles arbitrary PCRE errors.  [bug introduced in grep-2.15]
+
+  Handle very long lines (2GiB and longer) on systems with a deficient
+  read system call.
+
+* Noteworthy changes in release 2.15 (2013-10-26) [stable]
+
+** Bug fixes
+
+  grep's \s and \S failed to work with multi-byte white space characters.
+  For example, \s would fail to match a non-breaking space, and this
+  would print nothing: printf '\xc2\xa0' | LC_ALL=en_US.UTF-8 grep '\s'
+  A related bug is that \S would mistakenly match an invalid multibyte
+  character.  For example, the following would match:
+    printf '\x82\n' | LC_ALL=en_US.UTF-8 grep '^\S$'
+  [bug present since grep-2.6]
+
+  grep -i would segfault on systems using UTF-16-based wchar_t (Cygwin)
+  when converting an input string containing certain 4-byte UTF-8
+  sequences to lower case.  The conversions to wchar_t and back to
+  a UTF-8 multibyte string did not take surrogate pairs into account.
+  [bug present since at least grep-2.6, though the segfault is new with 2.13]
+
+  grep -E would segfault when given a regexp like '([^.]*[M]){1,2}'
+  for any multibyte character M. [bug introduced in grep-2.6, which would
+  segfault, but 2.7 and 2.8 had no problem, and 2.9 through 2.14 would
+  hit a failed assertion. ]
+
+  grep -F would get stuck in an infinite loop when given a search string
+  that is an invalid byte sequence in the current locale and that matches
+  the bytes of the input twice on a line.  Now grep fails with exit status 1.
+
+  grep -P could misbehave.  While multi-byte mode is only supported by PCRE
+  with UTF-8 locales, grep did not activate it.  This would cause failures
+  to match multibyte characters against some regular expressions, especially
+  those including the '.' or '\p' metacharacters.
+
+** New features
+
+  grep -P can now use a just-in-time compiler to greatly speed up matches,
+  This feature is transparent to the user; no flag is required to enable
+  it.  It is only available if the corresponding support in the PCRE
+  library is detected when grep is compiled.
+
+
+* Noteworthy changes in release 2.14 (2012-08-20) [stable]
+
+** Bug fixes
+
+  grep -i '^$' could exit 0 (i.e., report a match) in a multi-byte locale,
+  even though there was no match, and the command generated no output.
+  E.g., seq 2 | LC_ALL=en_US.utf8 grep -il '^$' would mistakenly print
+  "(standard input)".  Related, seq 9 | LC_ALL=en_US.utf8 grep -in '^$'
+  would print "2:4:6:8:10:12:14:16" and exit 0.  Now it prints nothing
+  and exits with status of 1.  [bug introduced in grep-2.6]
+
+  'grep' no longer falsely reports text files as being binary on file
+  systems that compress contents or that store tiny contents in metadata.
+
+
+* Noteworthy changes in release 2.13 (2012-07-04) [stable]
+
+** Bug fixes
+
+  grep -i, in a multi-byte locale, when matching a line containing a character
+  like the UTF-8 Turkish I-with-dot (U+0130) (whose lower-case representation
+  occupies fewer bytes), would print an incomplete output line.
+  Similarly, with a matched line containing a character (e.g., the Latin
+  capital I in a Turkish UTF-8 locale), where the lower-case representation
+  occupies more bytes, grep could print garbage.
+  [bug introduced in grep-2.6]
+
+  --include and --exclude can again be combined, and again apply to
+  the command line, e.g., "grep --include='*.[ch]' --exclude='system.h'
+  PATTERN *" again reads all *.c and *.h files except for system.h.
+  [bug introduced in grep-2.6]
+
+** New features
+
+  'grep' without -z now treats a sparse file as binary, if it can
+  easily determine that the file is sparse.
+
+** Dropped features
+
+  Bootstrapping with Makefile.boot has been broken since grep 2.6,
+  and was removed.
+
+
+* Noteworthy changes in release 2.12 (2012-04-23) [stable]
+
+** Bug fixes
+
+  "echo P|grep --devices=skip P" once again prints P, as it did in 2.10
+  [bug introduced in grep-2.11]
+
+  grep no longer segfaults with -r --exclude-dir and no file operand.
+  I.e., ":|grep -r --exclude-dir=D PAT" would segfault.
+  [bug introduced in grep-2.11]
+
+  Recursive grep now uses fts for directory traversal, so it can
+  handle much-larger directories without reporting things like "File
+  name too long", and it can run much faster when dealing with large
+  directory hierarchies. [bug present since the beginning]
+
+  grep -E 'a{1000000000}' now reports an overflow error rather than
+  silently acting like grep -E 'a\{1000000000}'.
+
+  grep -E 'a{,10}' was not treated equivalently to grep -E 'a{0,10}'.
+
+** New features
+
+  The -R option now has a long-option alias --dereference-recursive.
+
+** Changes in behavior
+
+  The -r (--recursive) option now follows only command-line symlinks.
+  Also, by default -r now reads a device only if it is named on the command
+  line; this can be overridden with --devices.  -R acts as before, so
+  use -R if you prefer the old behavior of following all symlinks and
+  defaulting to reading all devices.
+
+
+* Noteworthy changes in release 2.11 (2012-03-02) [stable]
+
+** Bug fixes
+
+  grep no longer dumps core on lines whose lengths do not fit in 'int'.
+  (e.g., lines longer than 2 GiB on a typical 64-bit host).
+  Instead, grep either works as expected, or reports an error.
+  An error can occur if not enough main memory is available, or if the
+  GNU C library's regular expression functions cannot handle such long lines.
+  [bug present since "the beginning"]
+
+  The -m, -A, -B, and -C options no longer mishandle context line
+  counts that do not fit in 'int'.  Also, grep -c's counts are now
+  limited by the type 'intmax_t' (typically less than 2**63) rather
+  than 'int' (typically less than 2**31).
+
+  grep no longer silently suppresses errors when reading a directory
+  as if it were a text file.  For example, "grep x ." now reports a
+  read error on most systems; formerly, it ignored the error.
+  [bug introduced in grep-2.5]
+
+  grep now exits with status 2 if a directory loop is found,
+  instead of possibly exiting with status 0 or 1.
+  [bug introduced in grep-2.3]
+
+  The -s option now suppresses certain input error diagnostics that it
+  formerly failed to suppress.  These include errors when closing the
+  input, when lseeking the input, and when the input is also the output.
+  [bug introduced in grep-2.4]
+
+  On POSIX systems, commands like "grep PAT < FILE >> FILE"
+  now report an error instead of looping.
+  [bug present since "the beginning"]
+
+  The --include, --exclude, and --exclude-dir options now handle
+  command-line arguments more consistently.  --include and --exclude
+  apply only to non-directories and --exclude-dir applies only to
+  directories.  "-" (standard input) is never excluded, since it is
+  not a file name.
+  [bug introduced in grep-2.5]
+
+  grep no longer rejects "grep -qr . > out", i.e., when run with -q
+  and an input file is the same as the output file, since with -q
+  grep generates no output, so there is no risk of infinite loop or
+  of an output-affecting race condition.  Thus, the use of the following
+  options also disables the input-equals-output failure:
+    --max-count=N (-m) (for N >= 2)
+    --files-with-matches (-l)
+    --files-without-match (-L)
+  [bug introduced in grep-2.10]
+
+  grep no longer emits an error message and quits on MS-Windows when
+  invoked with the -r option.
+
+  grep no longer misinterprets some alternations involving anchors
+  (^, $, \<  \>  \B, \b).  For example, grep -E "(^|\B)a" no
+  longer reports a match for the string "x a".
+  [bug present since "the beginning"]
+
+** New features
+
+  If no file operand is given, and a command-line -r or equivalent
+  option is given, grep now searches the working directory.  Formerly
+  grep ignored the -r and searched standard input nonrecursively.
+  An -r found in GREP_OPTIONS does not have this new effect.
+
+  grep now supports color highlighting of matches on MS-Windows.
+
+** Changes in behavior
+
+  Use of the --mmap option now elicits a warning.  It has been a no-op
+  since March of 2010.
+
+  grep no longer diagnoses write errors repeatedly; it exits after
+  diagnosing the first write error.  This is better behavior when
+  writing to a dangling pipe.
+
+  Syntax errors in GREP_COLORS are now ignored, instead of sometimes
+  eliciting warnings.  This is more consistent with programs that
+  (e.g.) ignore errors in termcap entries.
+
+* Noteworthy changes in release 2.10 (2011-11-16) [stable]
+
+** Bug fixes
+
+  grep no longer mishandles high-bit-set pattern bytes on systems
+  where "char" is a signed type. [bug appears to affect only MS-Windows]
+
+  On POSIX systems, grep now rejects a command like "grep -r pattern . > out",
+  in which the output file is also one of the inputs,
+  because it can result in an "infinite" disk-filling loop.
+  [bug present since "the beginning"]
+
+** Build-related
+
+  "make dist" no longer builds .tar.gz files.
+  xz is portable enough and in wide-enough use that distributing
+  only .tar.xz files is enough.
+
+
+* Noteworthy changes in release 2.9 (2011-06-21) [stable]
+
+** Bug fixes
+
+  grep no longer clobbers heap for an ERE like '(^| )*( |$)'
+  [bug introduced in grep-2.6]
+
+  grep is faster on regular expressions that match multibyte characters
+  in brackets (such as '[áéíóú]').
+
+  echo c|grep '[c]' would fail for any c in 0x80..0xff, with a uni-byte
+  encoding for which the byte-to-wide-char mapping is nontrivial.  For
+  example, the ISO-88591 locales are not affected, but ru_RU.KOI8-R is.
+  [bug introduced in grep-2.6]
+
+  grep -P no longer aborts when PCRE's backtracking limit is exceeded
+  Before, echo aaaaaaaaaaaaaab |grep -P '((a+)*)+$' would abort.  Now,
+  it diagnoses the problem and exits with status 2.
+
+
+* Noteworthy changes in release 2.8 (2011-05-13) [stable]
+
+** Bug fixes
+
+  echo c|grep '[c]' would fail for any c in 0x80..0xff, and in many locales.
+  E.g., printf '\xff\n'|grep "$(printf '[\xff]')" || echo FAIL
+  would print FAIL rather than the required matching line.
+  [bug introduced in grep-2.6]
+
+  grep's interpretation of range expression is now more consistent with
+  that of other tools.  [bug present since multi-byte character set
+  support was introduced in 2.5.2, though the steps needed to reproduce
+  it changed in grep-2.6]
+
+  grep erroneously returned with exit status 1 on some memory allocation
+  failure. [bug present since "the beginning"]
+
+
+* Noteworthy changes in release 2.7 (2010-09-16) [stable]
+
+** Bug fixes
+
+  grep --include=FILE works once again, rather than working like --exclude=FILE
+  [bug introduced in grep-2.6]
+
+  Searching with grep -Fw for an empty string would not match an
+  empty line. [bug present since "the beginning"]
+
+  X{0,0} is implemented correctly.  It used to be a synonym of X{0,1}.
+  [bug present since "the beginning"]
+
+  In multibyte locales, regular expressions including back-references
+  no longer exhibit quadratic complexity (i.e., they are orders
+  of magnitude faster). [bug present since multi-byte character set
+  support was introduced in 2.5.2]
+
+  In UTF-8 locales, regular expressions including "." can be orders
+  of magnitude faster.  For example, "grep ." is now twice as fast
+  as "grep -v ^$", instead of being immensely slower.  It remains
+  slow in other multibyte locales. [bug present since multi-byte
+  character set support was introduced in 2.5.2]
+
+  --mmap was meant to be ignored in 2.6.x, but it was instead
+  removed by mistake.  [bug introduced in 2.6]
+
+** New features
+
+  grep now diagnoses (and fails with exit status 2) commonly mistyped
+  regular expression like [:space:], [:digit:], etc.  Before, those were
+  silently interpreted as [ac:eps] and [dgit:] respectively.  Virtually
+  all who make that class of mistake should have used [[:space:]] or
+  [[:digit:]].  This new behavior is disabled when the POSIXLY_CORRECT
+  environment variable is set.
+
+  On systems using glibc, grep can support equivalence classes.  However,
+  whether they actually work depends on glibc's locale definitions.
+
+* Noteworthy changes in release 2.6.3 (2010-04-02) [stable]
+
+** Bug fixes
+
+  Searching with grep -F for an empty string in a multibyte locale
+  would hang grep. [bug introduced in 2.6.2]
+
+  PCRE support is once again detected on systems with <pcre/pcre.h>
+  [bug introduced in 2.6.2]
+
+
+* Noteworthy changes in release 2.6.2 (2010-03-29) [stable]
+
+** Bug fixes
+
+  grep -F no longer mistakenly reports a match when searching
+  for an incomplete prefix of a multibyte character.
+  [bug present since "the beginning"]
+
+  grep -F no longer goes into an infinite loop when it finds a match for an
+  incomplete (non-prefix of a) multibyte character.  [bug introduced in 2.6]
+
+  Using any of the --include or --exclude* options would cause a NULL
+  dereference.  [bugs introduced in 2.6]
+
+** Build-related
+
+  configure no longer relies on pkg-config to detect PCRE support.
+
+
+* Noteworthy changes in release 2.6.1 (2010-03-25) [stable]
+
+** Bug fixes
+
+  Character classes could cause a segmentation fault if they included a
+  multibyte character.  [bug introduced in 2.6]
+
+  Character ranges would not work in single-byte character sets other
+  than C (for example, ISO-8859-1 or KOI8-R) and some multi-byte locales.
+  For example, this should print "1", but would find no match:
+    $ echo 1 | env -i LC_COLLATE=en_US.UTF-8 grep '[0-9]'
+  [bug introduced in 2.6]
+
+  The output of grep was incorrect for whole-word (-w) matches if the
+  patterns included a back-reference. [bug introduced in grep-2.5.2]
+
+** Portability
+
+  Avoid a link failure on Solaris 8.
+
+
+* Noteworthy changes in release 2.6 (2010-03-23) [stable]
+
+** Speed improvements
+
+  grep is much faster on multibyte character sets, especially (but not
+  limited to) UTF-8 character sets.  The speed improvement is also very
+  pronounced with case-insensitive matches.
+
+** Bug fixes
+
+  Character classes would malfunction in multi-byte locales when using grep -i.
+  Examples which would print nothing for LC_ALL=en_US.UTF-8 include:
+  - for ranges, echo Z | grep -i '[a-z]'
+  - for single characters, echo Y | grep -i '[y]'
+  - for character types, echo Y | grep -i '[[:lower:]]'
+
+  grep -i -o would fail to report some matches; grep -i --color, while not
+  missing any line containing a match, would fail to color some matches.
+
+  grep would fail to report a match in a multibyte character set other than
+  UTF-8, if another match occurred earlier in the line but started in the
+  middle of a multibyte character.
+
+  Various bugs in grep -P, caused by expressions such as [^b] or \S matching
+  newlines, were fixed.  grep -P also supports the special sequences \Z and
+  \z, and can be combined with the command-line option -z to perform searches
+  on NUL-separated records.
+
+  grep would mistakenly exit with status 1 upon error, rather than 2,
+  as it is documented to do.
+
+  Using options like -1 -2 or -1 -v -2 results in two lines of
+  context (the last value that appears on the command line) instead
+  twelve (the concatenation of all the values).  This is consistent
+  with the behavior of options -A/-B/-C.
+
+  Two new command-line options, --group-separator=ARGUMENT and
+  --no-group-separator, enable further customization of the output
+  when -A, -B or -C is being used.
+
+** Other changes
+
+  egrep accepts the -E option and fgrep accepts the -F option.  If egrep
+  and fgrep are given another of the -E/-F/-G options, they print a more
+  meaningful error message.
+
+* Noteworthy changes in release 2.5.4 (2009-02-10) [stable]
+
+  - This is a bugfix release. No new features.
+
+Version 2.5.3
+  - The new option --exclude-dir allows to specify a directory pattern that
+    will be excluded from recursive grep.
+  - Numerous bug fixes
+
+Version 2.5.1
+  - This is a bugfix release. No new features.
+
+Version 2.5
+  - The new option --label allows to specify a different name for input
+    from stdin. See the man or info pages for details.
+
+  - The internal lib/getopt* files are no longer used on systems providing
+    getopt functionality in their libc (e.g. glibc 2.2.x).
+    If you need the old getopt files, use --with-included-getopt.
+
+  - The new option --only-matching (-o) will print only the part of matching
+    lines that matches the pattern. This is useful, for example, to extract
+    IP addresses from log files.
+
+  - i18n bug fixed ([A-Z0-9] wouldn't match A in locales other than C on
+    systems using recent glibc builds
+
+  - GNU grep can now be built with autoconf 2.52.
+
+  - The new option --devices controls how grep handles device files. Its usage
+    is analogous to --directories.
+
+  - The new option --line-buffered fflush on everyline.  There is a noticeable
+    slow down when forcing line buffering.
+
+  - Back-references are now local to the regex.
+    grep -e '\(a\)\1' -e '\(b\)\1'
+    The last backref \1 in the second expression refer to \(b\)
+
+  - The new option --include=PATTERN will search only matching files
+    when recursing in directories
+
+  - The new option --exclude=PATTERN will skip matching files when
+    recursing in directories.
+
+  - The new option --color will use the environment variable GREP_COLOR
+    (default is red) to highlight the matching string.
+    --color takes an optional argument specifying when to colorize a line:
+      --color=always, --color=tty, --color=never
+
+  - The following changes are for POSIX conformance:
+
+    . The -q or --quiet or --silent option now causes grep to exit
+      with zero status when a input line is selected, even if an error
+      also occurs.
+
+    . The -s or --no-messages option no longer affects the exit status.
+
+    . Bracket regular expressions like [a-z] are now locale-dependent.
+      For example, many locales sort characters in dictionary order,
+      and in these locales the regular expression [a-d] is not
+      equivalent to [abcd]; it might be equivalent to [aBbCcDd], for
+      example.  To obtain the traditional interpretation of bracket
+      expressions, you can use the C locale by setting the LC_ALL
+      environment variable to the value "C".
+
+  - The -C or --context option now requires an argument, partly for
+    consistency, and partly because POSIX recommends against
+    optional arguments.
+
+  - The new -P or --perl-regexp option tells grep to interpret the pattern as
+    a Perl regular expression.
+
+  - The new option --max-count=num makes grep stop reading a file after num
+    matching lines.
+    New option -m; equivalent to --max-count.
+
+  - Translations for bg, ca, da, nb and tr have been added.
+
+Version 2.4.2
+
+  - Added more check in configure to default the grep-${version}/src/regex.c
+    instead of the one in GNU Lib C.
+
+Version 2.4.1
+
+  - If the final byte of an input file is not a newline, grep now silently
+    supplies one.
+
+  - The new option --binary-files=TYPE makes grep assume that a binary input
+    file is of type TYPE.
+    --binary-files='binary' (the default) outputs a 1-line summary of matches.
+    --binary-files='without-match' assumes binary files do not match.
+    --binary-files='text' treats binary files as text
+        (equivalent to the -a or --text option).
+
+  - New option -I; equivalent to --binary-files='without-match'.
+
+Version 2.4:
+
+  - egrep is now equivalent to 'grep -E' as required by POSIX,
+    removing a longstanding source of confusion and incompatibility.
+    'grep' is now more forgiving about stray '{'s, for backward
+    compatibility with traditional egrep.
+
+  - The lower bound of an interval is not optional.
+    You must use an explicit zero, e.g. 'x{0,10}' instead of 'x{,10}'.
+    (The old documentation incorrectly claimed that it was optional.)
+
+  - The --revert-match option has been renamed to --invert-match.
+
+  - The --fixed-regexp option has been renamed to --fixed-strings.
+
+  - New option -H or --with-filename.
+
+  - New option --mmap.  By default, GNU grep now uses read instead of mmap.
+    This is faster on some hosts, and is safer on all.
+
+  - The new option -z or --null-data causes 'grep' to treat a zero byte
+    (the ASCII NUL character) as a line terminator in input data, and
+    to treat newlines as ordinary data.
+
+  - The new option -Z or --null causes 'grep' to output a zero byte
+    instead of the normal separator after a file name.
+
+  - These two options can be used with commands like 'find -print0',
+    'perl -0', 'sort -z', and 'xargs -0' to process arbitrary file names,
+    even those that contain newlines.
+
+  - The environment variable GREP_OPTIONS specifies default options;
+    e.g. GREP_OPTIONS='--directories=skip' reestablishes grep 2.1's
+    behavior of silently skipping directories.
+
+  - You can specify a matcher multiple times without error, e.g.
+    'grep -E -E' or 'fgrep -F'.  It is still an error to specify
+    conflicting matchers.
+
+  - -u and -U are now allowed on non-DOS hosts, and have no effect.
+
+  - Modifications of the tests scripts to go around the "Broken Pipe"
+    errors from bash. See Bash FAQ.
+
+  - New option -r or --recursive or --directories=recurse.
+    (This option was also in grep 2.3, but wasn't announced here.)
+
+  - --without-included-regex disable, was causing bogus reports .i.e
+    doing more harm then good.
+
+Version 2.3:
+
+  - When searching a binary file FOO, grep now just reports
+    "Binary file FOO matches" instead of outputting binary data.
+    This is typically more useful than the old behavior,
+    and it is also more consistent with other utilities like 'diff'.
+    A file is considered to be binary if it contains a NUL (i.e. zero) byte.
+
+    The new -a or --text option causes 'grep' to assume that all
+    input is text.  (This option has the same meaning as with 'diff'.)
+    Use it if you want binary data in your output.
+
+  - 'grep' now searches directories just like ordinary files; it no longer
+    silently skips directories.  This is the traditional behavior of
+    Unix text utilities (in particular, of traditional 'grep').
+    Hence 'grep PATTERN DIRECTORY' should report
+    "grep: DIRECTORY: Is a directory" on hosts where the operating system
+    does not permit programs to read directories directly, and
+    "grep: DIRECTORY: Binary file matches" (or nothing) otherwise.
+
+    The new -d ACTION or --directories=ACTION option affects directory handling.
+    '-d skip' causes 'grep' to silently skip directories, as in grep 2.1;
+    '-d read' (the default) causes 'grep' to read directories if possible,
+    as in earlier versions of grep.
+
+  - The MS-DOS and Microsoft Windows ports now behave identically to the
+    GNU and Unix ports with respect to binary files and directories.
+
+Version 2.2:
+
+Bug fix release.
+
+  - Status error number fix.
+  - Skipping directories removed.
+  - Many typos fix.
+  - -f /dev/null fix(not to consider as an empty pattern).
+  - Checks for wctype/wchar.
+  - -E was using the wrong matcher fix.
+  - bug in regex char class fix
+  - Fixes for DJGPP
+
+Version 2.1:
+
+This is a bug fix release(see Changelog) i.e. no new features.
+
+  - More compliance to GNU standard.
+  - Long options.
+  - Internationalization.
+  - Use automake/autoconf.
+  - Directory hierarchy change.
+  - Sigvec with -e on Linux corrected.
+  - Sigvec with -f on Linux corrected.
+  - Sigvec with the mmap() corrected.
+  - Bug in kwset corrected.
+  - -q, -L and -l stop on first match.
+  - New and improve regex.[ch] from Ulrich Drepper.
+  - New and improve dfa.[ch] from Arnold Robbins.
+  - Prototypes for over zealous C compiler.
+  - Not scanning a file, if it's a directory
+    (cause problems on Sun).
+  - Ported to MS-DOS/MS-Windows with DJGPP tools.
+
+See Changelog for the full story and proper credits.
+
+Version 2.0:
+
+The most important user visible change is that egrep and fgrep have
+disappeared as separate programs into the single grep program mandated
+by POSIX 1003.2.  New options -G, -E, and -F have been added,
+selecting grep, egrep, and fgrep behavior respectively.  For
+compatibility with historical practice, hard links named egrep and
+fgrep are also provided.  See the manual page for details.
+
+In addition, the regular expression facilities described in Posix
+draft 11.2 are now supported, except for internationalization features
+related to locale-dependent collating sequence information.
+
+There is a new option, -L, which is like -l except it lists
+files which don't contain matches.  The reason this option was
+added is because '-l -v' doesn't do what you expect.
+
+Performance has been improved; the amount of improvement is platform
+dependent, but (for example) grep 2.0 typically runs at least 30% faster
+than grep 1.6 on a DECstation using the MIPS compiler.  Where possible,
+grep now uses mmap() for file input; on a Sun 4 running SunOS 4.1 this
+may cut system time by as much as half, for a total reduction in running
+time by nearly 50%.  On machines that don't use mmap(), the buffering
+code has been rewritten to choose more favorable alignments and buffer
+sizes for read().
+
+Portability has been substantially cleaned up, and an automatic
+configure script is now provided.
+
+The internals have changed in ways too numerous to mention.
+People brave enough to reuse the DFA matcher in other programs
+will now have their bravery amply "rewarded", for the interface
+to that file has been completely changed.  Some changes were
+necessary to track the evolution of the regex package, and since
+I was changing it anyway I decided to do a general cleanup.
+
+========================================================================
+Copyright (C) 1992, 1997-2002, 2004-2021 Free Software Foundation, Inc.
+
+  Copying and distribution of this file, with or without modification,
+  are permitted in any medium without royalty provided the copyright
+  notice and this notice are preserved.
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
+Texts.  A copy of the license is included in the "GNU Free
+Documentation License" file as part of this distribution.
diff --git a/src/grep/README b/src/grep/README
new file mode 100644
index 0000000..7991358
--- /dev/null
+++ b/src/grep/README
@@ -0,0 +1,59 @@
+  Copyright (C) 1992, 1997-2002, 2004-2021 Free Software Foundation, Inc.
+
+  Copying and distribution of this file, with or without modification,
+  are permitted in any medium without royalty provided the copyright
+  notice and this notice are preserved.
+
+This is GNU grep, the "fastest grep in the west" (we hope).  All
+bugs reported in previous releases have been fixed.  Many exciting new
+bugs have probably been introduced in this revision.
+
+GNU grep is provided "as is" with no warranty.  The exact terms
+under which you may use and (re)distribute this program are detailed
+in the GNU General Public License, in the file COPYING.
+
+GNU grep is based on a fast lazy-state deterministic matcher (about
+twice as fast as stock Unix egrep) hybridized with a Boyer-Moore-Gosper
+search for a fixed string that eliminates impossible text from being
+considered by the full regexp matcher without necessarily having to
+look at every character.  The result is typically many times faster
+than Unix grep or egrep.  (Regular expressions containing back-references
+will run more slowly, however.)
+
+See the files AUTHORS and THANKS for a list of authors and other contributors.
+
+See the file INSTALL for compilation and installation instructions.
+If there is no INSTALL file, this copy of the source code is intended
+for expert hackers; please see the file README-hacking.
+
+See the file NEWS for a description of major changes in this release.
+
+See the file TODO for ideas on how you could help us improve grep.
+
+See the file README-alpha for information on grep development and the CVS
+  repository.
+
+Send bug reports to bug-grep@gnu.org.
+
+KNOWN BUGS:
+
+Several tests in fmbtest.sh and foad1.sh fail under the cs_CZ.UTF-8 locale
+and have been disabled.
+
+The combination of -o and -i options is broken and the known failing cases
+are disabled in foad1.sh
+
+The option -i does not work properly in some multibyte locales such as
+tr_TR.UTF-8 where the upper case and lower case forms of a character are not
+necessarily of the same byte length.
+
+A list of outstanding and resolved bugs can be found at:
+
+        https://debbugs.gnu.org/cgi/pkgreport.cgi?package=grep
+
+You can also browse the bug-grep mailing list archive at:
+
+        https://lists.gnu.org/r/bug-grep/
+
+For any copyright year range specified as YYYY-ZZZZ in this package
+note that the range specifies every single year in that closed interval.
diff --git a/src/grep/README-alpha b/src/grep/README-alpha
new file mode 100644
index 0000000..829d52a
--- /dev/null
+++ b/src/grep/README-alpha
@@ -0,0 +1,31 @@
+  Copyright (C) 1992, 1997-2002, 2004-2021 Free Software Foundation, Inc.
+
+  Copying and distribution of this file, with or without modification,
+  are permitted in any medium without royalty provided the copyright
+  notice and this notice are preserved.
+
+The development source code is available via Git from Savannah: see
+<https://git.savannah.gnu.org/cgit/grep.git>.  The main project page is at
+<https://savannah.gnu.org/projects/grep/>.
+
+The source code in the Git uses autotools to generate some files. Before
+following the instructions in the INSTALL file for compiling grep, you
+need to run the bootstrap script.
+
+Please submit bug reports to <bug-grep@gnu.org>.
+
+If you are interested in the development of GNU grep, you may want to
+subscribe to the development mailing list.  To subscribe, send an email
+message to <bug-grep-request@gnu.org> with "subscribe" (without the
+quotation marks) in the subject header field (or in the body) of the
+email, or visit <https://lists.gnu.org/mailman/listinfo/bug-grep>.
+
+To follow development more closely, there is also the grep-commit mailing
+list to which log entries (one per commit) and diff output (one per
+modified file) from CVS are automatically sent.  To subscribe, send an
+email message to <grep-commit-request@gnu.org> with "subscribe" (without
+the quotation marks) in the subject header field (or in the body) of
+the email, or visit <https://lists.gnu.org/mailman/listinfo/grep-commit>.
+
+A web page containing information for GNU grep developers is at
+<https://www.gnu.org/software/grep/devel.html>.
diff --git a/src/grep/THANKS b/src/grep/THANKS
new file mode 100644
index 0000000..2583cfa
--- /dev/null
+++ b/src/grep/THANKS
@@ -0,0 +1,143 @@
+These people have contributed to the GNU grep. Those contributions are
+described in the version control logs.  If your name has been left out,
+if you'd rather not be listed, or if you'd prefer a different address
+be used, please send a note to the bug-report mailing list (as seen at
+end of e.g., grep --help).
+
+Adam Katz                           savannah@kopis.com
+Aharon Robbins                      arnold@skeeve.com
+Akim Demaille                       akim@epita.fr
+Alain Magloire                      alainm@rcsm.ee.mcgill.ca
+Allan McRae                         allan@archlinux.org
+Andreas Ley                         andy@rz.uni-karlsruhe.de
+Andreas Schwab                      schwab@suse.de
+Arnold D. Robbins                   arnold@skeeve.com
+Arnold Robbins                      arnold@skeeve.com
+Barret Rhoden                       brho@cs.berkeley.edu
+Bastiaan "Darquan" Stougie          darquan@zonnet.nl
+behoffski                           behoffski@grouse.com.au
+Ben Elliston                        bje@cygnus.com
+Benno Schulenberg                   bensberg@justemail.net
+Bernd Strieder                      strieder@student.uni-kl.de
+Bernhard Rosenkraenzer              bero@arklinux.org
+Bernhard Voelker                    mail@bernhard-voelker.de
+Bob Proulx                          rwp@hprwp.fc.hp.com
+Brian Youmans                       3diff@gnu.org
+Bruno Haible                        bruno@clisp.org
+Charles Levert                      charles_levert@gna.org
+Christian Boltz                     grep-bug@cboltz.de
+Christian Groessler                 cpg@aladdin.de
+Corinna Vinschen                    vinschen@redhat.com
+Dagobert Michelsen                  dam@opencsw.org
+Daisuke GOTO                        gotoh@m-design.com
+Dave Reisner                        d@falconindy.com
+David Clissold                      cliss@austin.ibm.com
+David J MacKenzie                   djm@catapult.va.pubnix.com
+David O'Brien                       obrien@freebsd.org
+Dmitry V. Levin                     ldv@altlinux.org
+'Drake' Daham Wang                  drakewang@gmail.com
+Egmont Koblinger                    egmont@gmail.com
+Eli Zaretskii                       eliz@gnu.org
+Eric Blake                          eblake@redhat.com
+Fernando Basso                      fernandobasso.br@gmail.com
+Florian La Roche                    laroche@redhat.com
+François Pinard                     pinard@iro.umontreal.ca
+Gerald Stoller                      gerald_stoller@hotmail.com
+Grant McDorman                      grant@isgtec.com
+Greg Boyd                           gboyd.ccsf@gmail.com
+Greg Louis                          glouis@dynamicro.on.ca
+Guglielmo 'bond' Bondioni           g.bondioni@libero.it
+H. Merijn Brand                     h.m.brand@hccnet.nl
+Hans-Bernhard Broeker               broeker@physik.rwth-aachen.de
+Harald Hanche-Olsen                 hanche@math.ntnu.no
+Heikki Korpela                      heko@iki.fi
+Helge Kreutzmann                    debian@helgefjell.de
+Igor O. Ladygin                     assa@zabtrans.ru
+Ilya Basin                          basinilya@gmail.com
+Isamu Hasegawa                      isamu@yamato.ibm.com
+Jaroslav Škarvada                   jskarvad@redhat.com
+Javier Villavicencio                the_paya@gentoo.org
+Jeff Bailey                         jbailey@nisa.net
+Jim Hand                            jhand@austx.tandem.com
+Jim Meyering                        jim@meyering.net
+Jochen Hein                         jochen.hein@delphi.central.de
+Joel N. Weber II                    devnull@gnu.org
+Johan Walles                        johan.walles@gmail.com
+John Hughes                         john@nitelite.calvacom.fr
+Jorge Stolfi                        stolfi@dcc.unicamp.br
+Juan Manuel Guerrero                juan.guerrero@gmx.de
+Julian Foad                         julianfoad@btopenworld.com
+Karl Berry                          karl@gnu.org
+Karl Heuer                          kwzh@gnu.org
+Kaveh R. Ghazi                      ghazi@caip.rutgers.edu
+Kazuro Furukawa                     furukawa@apricot.kek.jp
+Keith Bostic                        bostic@bsdi.com
+Krishna Sethuraman                  krishna@sgihub.corp.sgi.com
+Kurt D Schwehr                      kdschweh@insci14.ucsd.edu
+Ludovic Courtès                     ludo@gnu.org
+Marc Aldorasi                       m101010a@gmail.com
+Marek Suppa                         mr@shu.io
+Mark Veltzer                        mark.veltzer@gmail.com
+Mark Waite                          markw@mddmew.fc.hp.com
+Martin P.J. Zinser                  zinser@decus.de
+Martin Rex                          martin.rex@sap-ag.de
+Matthew Burgess                     matthew@linuxfromscratch.org
+Michael Aichlmayr                   mikla@nx.com
+Mike Frysinger                      vapier@gentoo.org
+Mike Haertel                        mike@ducky.net
+Miles Bader                         miles@ccs.mt.nec.co.jp
+Mirraz Mirraz                       mirraz1@rambler.ru
+Nelson H. F. Beebe                  beebe@math.utah.edu
+Nicolas Vigier                      boklm@mars-attacks.org
+Nima Aghdaii                        naghdaii@fb.com
+Norihiro Tanaka                     noritnk@kcn.ne.jp
+Olaf Kirch                          okir@ns.lst.de
+Pádraig Brady                       P@draigBrady.com
+Paolo Bonzini                       bonzini@gnu.org
+Patrick Boyd                        pboyd04@gmail.com
+Paul Eggert                         eggert@cs.ucla.edu
+Paul Kimoto                         kimoto@spacenet.tn.cornell.edu
+Péter Radics                        mitchnull@gmail.com
+Petr Písař                          petr.pisar@atlas.cz
+Petr Pisar                          ppisar@redhat.com
+Philip Hazel                        ph10@cus.cam.ac.uk
+Philipp Kohlbecher                  xt28@gmx.de
+Philippe Defert                     Philippe.Defert@cern.ch
+Philippe De Muyter                  phdm@info.ucl.ac.be
+Phillip C. Brisco                   phillip.craig.brisco@ccmail.census.gov
+Rainer Orth                         ro@cebitec.uni-bielefeld.de
+Reuben Thomas                       rrt@sc3d.org
+Roland Roberts                      rroberts@muller.com
+Ruslan Ermilov                      ru@freebsd.org
+Santiago Ruano Rincón               santiago@debian.org
+Santiago Vila                       sanvila@unex.es
+Shannon Hill                        hill@synnet.com
+Sotiris Vassilopoulos               Sotiris.Vassilopoulos@betatech.gr
+Standish Parsley                    adsspamtrap01@yahoo.com
+Stefano Lattarini                   stefano.lattarini@gmail.com
+Stepan Kasal                        kasal@ucw.cz
+Stephan T. Lavavej                  stl@nuwen.net
+Stephane Chazelas                   stephane.chazelas@gmail.com
+Stewart Levin                       stew@sep.stanford.edu
+Strahinja Kustudic                  kustodian@gmail.com
+Sven Joachim                        svenjoac@gmx.de
+Sydoruk Stepan                      step@unitex.kiev.ua
+Tapani Tarvainen                    tt@mit.jyu.fi
+Tim Waugh                           twaugh@redhat.com
+Tom 'moof' Spindler                 dogcow@ccs.neu.edu
+Tom Tromey                          tromey@creche.cygnus.com
+Tony Abou-Assaleh                   taa@acm.org
+UEBAYASHI Masao                     masao@nf.enveng.titech.ac.jp
+Ulrich Drepper                      drepper@cygnus.com
+Uwe H. Steinfeld                    usteinfeld@gmx.net
+Volker Borchert                     bt@teknon.de
+Wichert Akkerman                    wichert@cistron.nl
+William Bader                       william@nscs.fast.net
+Wolfgang Schludi                    schludi@syscomp.de
+Yuliy Pisetsky                      ypisetsky@fb.com
+Zev Weiss                           zev@bewilderbeest.net
+Zoltan Herczeg                      hzmester@freemail.hu
+
+;; Local Variables:
+;; coding: utf-8
+;; End:
diff --git a/src/grep/THANKS.in b/src/grep/THANKS.in
new file mode 100644
index 0000000..9872bfa
--- /dev/null
+++ b/src/grep/THANKS.in
@@ -0,0 +1,102 @@
+These people have contributed to the GNU grep. Those contributions are
+described in the version control logs.  If your name has been left out,
+if you'd rather not be listed, or if you'd prefer a different address
+be used, please send a note to the bug-report mailing list (as seen at
+end of e.g., grep --help).
+##
+## There is no need to list here any name that appears as an Author in
+## "git log" output.  Those are automatically added when this template
+## is used to generate the THANKS file.  Note that numerous people listed
+## here would have been listed as commit authors if we had been using git
+## for version control when they contributed.
+
+Akim Demaille                       akim@epita.fr
+Andreas Schwab                      schwab@suse.de
+Andreas Ley                         andy@rz.uni-karlsruhe.de
+Bastiaan "Darquan" Stougie          darquan@zonnet.nl
+Ben Elliston                        bje@cygnus.com
+Bernd Strieder                      strieder@student.uni-kl.de
+Bob Proulx                          rwp@hprwp.fc.hp.com
+Brian Youmans                       3diff@gnu.org
+Christian Boltz                     grep-bug@cboltz.de
+Christian Groessler                 cpg@aladdin.de
+Dagobert Michelsen                  dam@opencsw.org
+Daisuke GOTO                        gotoh@m-design.com
+Dave Reisner                        d@falconindy.com
+David Clissold                      cliss@austin.ibm.com
+David J MacKenzie                   djm@catapult.va.pubnix.com
+David O'Brien                       obrien@freebsd.org
+'Drake' Daham Wang                  drakewang@gmail.com
+Egmont Koblinger                    egmont@gmail.com
+Fernando Basso                      fernandobasso.br@gmail.com
+Florian La Roche                    laroche@redhat.com
+François Pinard                     pinard@iro.umontreal.ca
+Gerald Stoller                      gerald_stoller@hotmail.com
+Grant McDorman                      grant@isgtec.com
+Greg Boyd                           gboyd.ccsf@gmail.com
+Greg Louis                          glouis@dynamicro.on.ca
+Guglielmo 'bond' Bondioni           g.bondioni@libero.it
+H. Merijn Brand                     h.m.brand@hccnet.nl
+Harald Hanche-Olsen                 hanche@math.ntnu.no
+Hans-Bernhard Broeker               broeker@physik.rwth-aachen.de
+Heikki Korpela                      heko@iki.fi
+Igor O. Ladygin                     assa@zabtrans.ru
+Ilya Basin                          basinilya@gmail.com
+Isamu Hasegawa                      isamu@yamato.ibm.com
+Jeff Bailey                         jbailey@nisa.net
+Jim Hand                            jhand@austx.tandem.com
+Jochen Hein                         jochen.hein@delphi.central.de
+Joel N. Weber II                    devnull@gnu.org
+John Hughes                         john@nitelite.calvacom.fr
+Jorge Stolfi                        stolfi@dcc.unicamp.br
+Karl Heuer                          kwzh@gnu.org
+Kaveh R. Ghazi                      ghazi@caip.rutgers.edu
+Kazuro Furukawa                     furukawa@apricot.kek.jp
+Keith Bostic                        bostic@bsdi.com
+Krishna Sethuraman                  krishna@sgihub.corp.sgi.com
+Kurt D Schwehr                      kdschweh@insci14.ucsd.edu
+Ludovic Courtès                     ludo@gnu.org
+Marc Aldorasi                       m101010a@gmail.com
+Mark Waite                          markw@mddmew.fc.hp.com
+Martin P.J. Zinser                  zinser@decus.de
+Martin Rex                          martin.rex@sap-ag.de
+Michael Aichlmayr                   mikla@nx.com
+Miles Bader                         miles@ccs.mt.nec.co.jp
+Mirraz Mirraz                       mirraz1@rambler.ru
+Nelson H. F. Beebe                  beebe@math.utah.edu
+Nima Aghdaii                        naghdaii@fb.com
+Olaf Kirch                          okir@ns.lst.de
+Paul Kimoto                         kimoto@spacenet.tn.cornell.edu
+Péter Radics                        mitchnull@gmail.com
+Phillip C. Brisco                   phillip.craig.brisco@ccmail.census.gov
+Philipp Kohlbecher                  xt28@gmx.de
+Philippe Defert                     Philippe.Defert@cern.ch
+Philippe De Muyter                  phdm@info.ucl.ac.be
+Philip Hazel                        ph10@cus.cam.ac.uk
+Rainer Orth                         ro@cebitec.uni-bielefeld.de
+Roland Roberts                      rroberts@muller.com
+Ruslan Ermilov                      ru@freebsd.org
+Santiago Vila                       sanvila@unex.es
+Shannon Hill                        hill@synnet.com
+Sotiris Vassilopoulos               Sotiris.Vassilopoulos@betatech.gr
+Standish Parsley                    adsspamtrap01@yahoo.com
+Stewart Levin                       stew@sep.stanford.edu
+Strahinja Kustudic                  kustodian@gmail.com
+Sven Joachim                        svenjoac@gmx.de
+Sydoruk Stepan                      step@unitex.kiev.ua
+Tapani Tarvainen                    tt@mit.jyu.fi
+Tim Waugh                           twaugh@redhat.com
+Tom 'moof' Spindler                 dogcow@ccs.neu.edu
+Tom Tromey                          tromey@creche.cygnus.com
+Ulrich Drepper                      drepper@cygnus.com
+UEBAYASHI Masao                     masao@nf.enveng.titech.ac.jp
+Uwe H. Steinfeld                    usteinfeld@gmx.net
+Volker Borchert                     bt@teknon.de
+Wichert Akkerman                    wichert@cistron.nl
+William Bader                       william@nscs.fast.net
+Wolfgang Schludi                    schludi@syscomp.de
+Zoltan Herczeg                      hzmester@freemail.hu
+
+;; Local Variables:
+;; coding: utf-8
+;; End:
diff --git a/src/grep/TODO b/src/grep/TODO
new file mode 100644
index 0000000..5211ac1
--- /dev/null
+++ b/src/grep/TODO
@@ -0,0 +1,339 @@
+Things to do for GNU grep
+
+  Copyright (C) 1992, 1997-2002, 2004-2021 Free Software Foundation, Inc.
+
+  Copying and distribution of this file, with or without modification,
+  are permitted in any medium without royalty provided the copyright
+  notice and this notice are preserved.
+
+===============
+Short term work
+===============
+
+See where we are with UTF-8 performance.
+
+Merge Debian patches that seem relevant.
+
+Go through patches in Savannah.
+
+Fix --directories=read.
+
+Write better Texinfo documentation for grep.  The manual page would be a
+good place to start, but Info documents are also supposed to contain a
+tutorial and examples.
+
+Some tests in tests/spencer2.tests should have failed!  Need to filter out
+some bugs in dfa.[ch]/regex.[ch].
+
+Multithreading?
+
+GNU grep originally did 32-bit arithmetic.  Although it has moved to
+64-bit on 64-bit platforms by using types like ptrdiff_t and size_t,
+this conversion has not been entirely systematic and should be checked.
+
+Lazy dynamic linking of libpcre.  See Debian’s 03-397262-dlopen-pcre.patch.
+
+Check FreeBSD’s integration of zgrep (-Z) and bzgrep (-J) in one
+binary.  Is there a possibility of doing even better by automatically
+checking the magic of binary files ourselves (0x1F 0x8B for gzip, 0x1F
+0x9D for compress, and 0x42 0x5A 0x68 for bzip2)?  Once what to do with
+libpcre is decided, do the same for libz and libbz2.
+
+
+===================
+Matching algorithms
+===================
+
+Take a look at these and consider opportunities for merging or cloning:
+
+   -- http://osrd.org/projects/grep/global-regular-expression-print-tools-grep-variants
+   -- ja-grep’s mlb2 patch (Japanese grep)
+      <http://distcache.freebsd.org/ports-distfiles/grep-2.4.2-mlb2.patch.gz>
+   -- lgrep (from lv, a Powerful Multilingual File Viewer / Grep)
+      <http://www.mt.cs.keio.ac.jp/person/narita/lv/>;
+   -- cgrep (Context grep) <https://awgn.github.io/cgrep/>
+      seems like nice work;
+   -- sgrep (Struct grep) <https://www.cs.helsinki.fi/u/jjaakkol/sgrep.html>;
+   -- agrep (Approximate grep) <https://www.tgries.de/agrep/>,
+      from glimpse;
+   -- nr-grep (Nondeterministic reverse grep)
+      <https://www.dcc.uchile.cl/~gnavarro/software/>;
+   -- ggrep (Grouse grep) <http://www.grouse.com.au/ggrep/>;
+   -- freegrep <https://github.com/howardjp/freegrep>;
+
+Check some new algorithms for matching.  See, for example, Faro &
+Lecroq (cited in kwset.c).
+
+Fix the DFA matcher to never use exponential space.  (Fortunately, these
+cases are rare.)
+
+
+============================
+Standards: POSIX and Unicode
+============================
+
+For POSIX compliance issues, see POSIX 1003.1.
+
+Current support for the POSIX [= =] and [. .] constructs is limited to
+platforms whose regular expression matchers are sufficiently
+compatible with the GNU C library so that the --without-included-regex
+option of ‘configure’ is in effect.  Extend this support to non-glibc
+platforms, where --with-included-regex is in effect, by modifying the
+included version of the regex code to defer to the native version when
+handling [= =] and [. .].
+
+For Unicode, interesting things to check include the Unicode Standard
+<https://www.unicode.org/standard/standard.html> and the Unicode Technical
+Standard #18 (<https://www.unicode.org/reports/tr18/> “Unicode Regular
+Expressions”).  Talk to Bruno Haible who’s maintaining GNU libunistring.
+See also Unicode Standard Annex #15 (<https://www.unicode.org/reports/tr15/>
+“Unicode Normalization Forms”), already implemented by GNU libunistring.
+
+In particular, --ignore-case needs to be evaluated against the standards.
+We may want to deviate from POSIX if Unicode provides better or clearer
+semantics.
+
+POSIX and --ignore-case
+-----------------------
+
+For this issue, interesting things to check in POSIX include the
+Open Group Base Specifications, Chapter “Regular Expressions”, in
+particular Section “Regular Expression General Requirements” and its
+paragraph about caseless matching (this may not have been fully
+thought through and that this text may be self-contradicting
+[specifically: “of either data or patterns” versus all the rest]).
+See:
+
+http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_02
+
+In particular, consider the following with POSIX’s approach to case
+folding in mind.  Assume a non-Turkic locale with a character
+repertoire reduced to the following various forms of “LATIN LETTER I”:
+
+  0049;LATIN CAPITAL LETTER I;Lu;0;L;;;;;N;;;;0069;
+  0069;LATIN SMALL LETTER I;Ll;0;L;;;;;N;;;0049;;0049
+  0130;LATIN CAPITAL LETTER I WITH DOT ABOVE;Lu;0;L;0049 0307;;;;N;\
+    LATIN CAPITAL LETTER I DOT;;;0069;
+  0131;LATIN SMALL LETTER DOTLESS I;Ll;0;L;;;;;N;;;0049;;0049
+
+UTF-8 octet lengths differ between U+0049 (0x49) and U+0069 (0x69)
+versus U+0130 (0xC4 0xB0) and U+0131 (0xC4 0xB1).  This implies that
+whole UTF-8 strings cannot be case-converted in place, using the same
+memory buffer, and that the needed octet-size of the new buffer cannot
+merely be guessed (although there’s a simple upper bound of five times
+the size of the input, as the longest UTF-8 encoding of any character
+is five bytes).
+
+We have
+
+  lc(I) = i, uc(I) = I
+  lc(i) = i, uc(i) = I
+  lc(İ) = i, uc(İ) = İ
+  lc(ı) = ı, uc(ı) = I
+
+where lc() and uc() denote lower-case and upper-case conversions.
+
+There are several candidate --ignore-case logics.  Using the
+
+  if (lc(input_wchar) == lc(pattern_wchar))
+
+logic leads to the following matches:
+
+    \in  I  i  İ  ı
+  pat\   ----------
+   I  |  Y  Y  Y  n
+   i  |  Y  Y  Y  n
+   İ  |  Y  Y  Y  n
+   ı  |  n  n  n  Y
+
+There is a lack of symmetry between CAPITAL and SMALL LETTERs with
+this.  Using the
+
+  if (uc(input_wchar) == uc(pattern_wchar))
+
+logic (which is what GNU grep currently does although this is not
+documented or guaranteed in the future), leads to the following
+matches:
+
+    \in  I  i  İ  ı
+  pat\   ----------
+   I  |  Y  Y  n  Y
+   i  |  Y  Y  n  Y
+   İ  |  n  n  Y  n
+   ı  |  Y  Y  n  Y
+
+There is a lack of symmetry between CAPITAL and SMALL LETTERs with
+this.
+
+Using the
+
+  if (lc(input_wchar) == lc(pattern_wchar)
+      || uc(input_wchar) == uc(pattern_wchar))
+
+logic leads to the following matches:
+
+    \in  I  i  İ  ı
+  pat\   ----------
+   I  |  Y  Y  Y  Y
+   i  |  Y  Y  Y  Y
+   İ  |  Y  Y  Y  n
+   ı  |  Y  Y  n  Y
+
+There is some elegance and symmetry with this.  But there are
+potentially two conversions to be made per input character.  If the
+pattern is pre-converted, two copies of it need to be kept and used in
+a mutually coherent fashion.
+
+Using the
+
+  if (input_wchar  == pattern_wchar
+      || lc(input_wchar) == pattern_wchar
+      || uc(input_wchar) == pattern_wchar)
+
+logic (a plausible interpretation of POSIX) leads to the following
+matches:
+
+    \in  I  i  İ  ı
+  pat\   ----------
+   I  |  Y  Y  n  Y
+   i  |  Y  Y  Y  n
+   İ  |  n  n  Y  n
+   ı  |  n  n  n  Y
+
+There is a different CAPITAL/SMALL symmetry with this.  But there’s
+also a loss of pattern/input symmetry that’s unique to it.  Also there
+are potentially two conversions to be made per input character.
+
+Using the
+
+  if (lc(uc(input_wchar)) == lc(uc(pattern_wchar)))
+
+logic leads to the following matches:
+
+    \in  I  i  İ  ı
+  pat\   ----------
+   I  |  Y  Y  Y  Y
+   i  |  Y  Y  Y  Y
+   İ  |  Y  Y  Y  Y
+   ı  |  Y  Y  Y  Y
+
+This shows total symmetry and transitivity (at least in this example
+analysis).  There are two conversions to be made per input character,
+but support could be added for having a single straight mapping
+performing a composition of the two conversions.
+
+Any optimization in the implementation of each logic must not change
+its basic semantic.
+
+
+Unicode and --ignore-case
+-------------------------
+
+For this issue, interesting things to check in Unicode include:
+
+  - The Unicode Standard, Chapter 3
+    (<https://www.unicode.org/versions/Unicode9.0.0/ch03.pdf>
+    “Conformance”), Section 3.13 (“Default Case Algorithms”) and the
+    toCasefold() case conversion operation.
+
+  - The Unicode Standard, Chapter 4
+    (<https://www.unicode.org/versions/Unicode9.0.0/ch04.pdf>
+    “Character Properties”), Section 4.2 (“Case”) and
+    the <https://www.unicode.org/Public/UNIDATA/SpecialCasing.txt>
+    SpecialCasing.txt and
+    <https://www.unicode.org/Public/UNIDATA/CaseFolding.txt>
+    CaseFolding.txt files.
+
+  - The Unicode Standard, Chapter 5
+    (<https://www.unicode.org/versions/Unicode9.0.0/ch05.pdf>
+    “Implementation Guidelines”), Section 5.18 (“Case Mappings”),
+    Subsection “Caseless Matching”.
+
+  - The Unicode case charts <https://www.unicode.org/charts/case/>.
+
+Unicode uses the
+
+  if (toCasefold(input_wchar_string) == toCasefold(pattern_wchar_string))
+
+logic for caseless matching.  Consider the “LATIN LETTER I” example
+mentioned above.  In a non-Turkic locale, simple case folding yields
+
+  toCasefold_simple(U+0049) = U+0069
+  toCasefold_simple(U+0069) = U+0069
+  toCasefold_simple(U+0130) = U+0130
+  toCasefold_simple(U+0131) = U+0131
+
+which leads to the following matches:
+
+    \in  I  i  İ  ı
+  pat\   ----------
+   I  |  Y  Y  n  n
+   i  |  Y  Y  n  n
+   İ  |  n  n  Y  n
+   ı  |  n  n  n  Y
+
+This is different from anything so far!
+
+In a non-Turkic locale, full case folding yields
+
+  toCasefold_full(U+0049) = U+0069
+  toCasefold_full(U+0069) = U+0069
+  toCasefold_full(U+0130) = <U+0069, U+0307>
+  toCasefold_full(U+0131) = U+0131
+
+with
+
+  0307;COMBINING DOT ABOVE;Mn;230;NSM;;;;;N;NON-SPACING DOT ABOVE;;;;
+
+which leads to the following matches:
+
+    \in  I  i  İ  ı
+  pat\   ----------
+   I  |  Y  Y  *  n
+   i  |  Y  Y  *  n
+   İ  |  n  n  Y  n
+   ı  |  n  n  n  Y
+
+This is just sad!
+
+Having toCasefold(U+0131), simple or full, map to itself instead of
+U+0069 is in contradiction with the rules of Section 5.18 of the
+Unicode Standard since toUpperCase(U+0131) is U+0049.  Same thing for
+toCasefold_simple(U+0130) since toLowerCase(U+0131) is U+0069.  The
+justification for the weird toCasefold_full(U+0130) mapping is
+unknown; it doesn’t even make sense to add a dot (U+0307) to a letter
+that already has one (U+0069).  It would have been so simple to put
+them all in the same equivalence class!
+
+Otherwise, also consider the following problem with Unicode’s approach
+on case folding in mind.  Assume that we want to perform
+
+  echo 'AßBC' | grep -i 'Sb'
+
+which corresponds to
+
+  input:    U+0041 U+00DF U+0042 U+0043 U+000A
+  pattern:  U+0053 U+0062
+
+Following CaseFolding.txt, applying the toCasefold() transformation to
+these yields
+
+  input:    U+0061 U+0073 U+0073 U+0062 U+0063 U+000A
+  pattern:                U+0073 U+0062
+
+so, according to this approach, the input should match the pattern.
+As long as the original input line is to be reported to the user as a
+whole, there is no problem (from the user’s point-of-view;
+implementation is complicated by this).
+
+However, consider both these GNU extensions:
+
+  echo 'AßBC' | grep -i --only-matching 'Sb'
+  echo 'AßBC' | grep -i --color=always  'Sb'
+
+What is to be reported in these cases, since the match begins in the
+*middle* of the original input character ‘ß’?
+
+Unicode’s toCasefold() cannot be implemented in terms of POSIX’s
+towctrans() since that can only return a single wint_t value per input
+wint_t value.
diff --git a/src/grep/aclocal.m4 b/src/grep/aclocal.m4
new file mode 100644
index 0000000..f424ccf
--- /dev/null
+++ b/src/grep/aclocal.m4
@@ -0,0 +1,1381 @@
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+       ${MAKE-make} -s -f confmf > /dev/null 2>&1; then
+      # icc doesn't choke on unknown options, it will just issue warnings
+      # or remarks (even with -Werror).  So we grep stderr for any message
+      # that says an option was ignored or not supported.
+      # When given -MP, icc 7.0 and 7.1 complain thusly:
+      #   icc: Command line warning: ignoring option '-M'; no argument required
+      # The diagnosis changed in icc 8.0:
+      #   icc: Command line remark: option '-MP' not supported
+      if (grep 'ignoring option' conftest.err ||
+          grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
+        am_cv_$1_dependencies_compiler_type=$depmode
+        break
+      fi
+    fi
+  done
+
+  cd ..
+  rm -rf conftest.dir
+else
+  am_cv_$1_dependencies_compiler_type=none
+fi
+])
+AC_SUBST([$1DEPMODE], [depmode=$am_cv_$1_dependencies_compiler_type])
+AM_CONDITIONAL([am__fastdep$1], [
+  test "x$enable_dependency_tracking" != xno \
+  && test "$am_cv_$1_dependencies_compiler_type" = gcc3])
+])
+
+
+# AM_SET_DEPDIR
+# -------------
+# Choose a directory name for dependency files.
+# This macro is AC_REQUIREd in _AM_DEPENDENCIES.
+AC_DEFUN([AM_SET_DEPDIR],
+[AC_REQUIRE([AM_SET_LEADING_DOT])dnl
+AC_SUBST([DEPDIR], ["${am__leading_dot}deps"])dnl
+])
+
+
+# AM_DEP_TRACK
+# ------------
+AC_DEFUN([AM_DEP_TRACK],
+[AC_ARG_ENABLE([dependency-tracking], [dnl
+AS_HELP_STRING(
+  [--enable-dependency-tracking],
+  [do not reject slow dependency extractors])
+AS_HELP_STRING(
+  [--disable-dependency-tracking],
+  [speeds up one-time build])])
+if test "x$enable_dependency_tracking" != xno; then
+  am_depcomp="$ac_aux_dir/depcomp"
+  AMDEPBACKSLASH='\'
+  am__nodep='_no'
+fi
+AM_CONDITIONAL([AMDEP], [test "x$enable_dependency_tracking" != xno])
+AC_SUBST([AMDEPBACKSLASH])dnl
+_AM_SUBST_NOTMAKE([AMDEPBACKSLASH])dnl
+AC_SUBST([am__nodep])dnl
+_AM_SUBST_NOTMAKE([am__nodep])dnl
+])
+
+# Generate code to set up dependency tracking.              -*- Autoconf -*-
+
+# Copyright (C) 1999-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# _AM_OUTPUT_DEPENDENCY_COMMANDS
+# ------------------------------
+AC_DEFUN([_AM_OUTPUT_DEPENDENCY_COMMANDS],
+[{
+  # Older Autoconf quotes --file arguments for eval, but not when files
+  # are listed without --file.  Let's play safe and only enable the eval
+  # if we detect the quoting.
+  # TODO: see whether this extra hack can be removed once we start
+  # requiring Autoconf 2.70 or later.
+  AS_CASE([$CONFIG_FILES],
+          [*\'*], [eval set x "$CONFIG_FILES"],
+          [*], [set x $CONFIG_FILES])
+  shift
+  # Used to flag and report bootstrapping failures.
+  am_rc=0
+  for am_mf
+  do
+    # Strip MF so we end up with the name of the file.
+    am_mf=`AS_ECHO(["$am_mf"]) | sed -e 's/:.*$//'`
+    # Check whether this is an Automake generated Makefile which includes
+    # dependency-tracking related rules and includes.
+    # Grep'ing the whole file directly is not great: AIX grep has a line
+    # limit of 2048, but all sed's we know have understand at least 4000.
+    sed -n 's,^am--depfiles:.*,X,p' "$am_mf" | grep X >/dev/null 2>&1 \
+      || continue
+    am_dirpart=`AS_DIRNAME(["$am_mf"])`
+    am_filepart=`AS_BASENAME(["$am_mf"])`
+    AM_RUN_LOG([cd "$am_dirpart" \
+      && sed -e '/# am--include-marker/d' "$am_filepart" \
+        | $MAKE -f - am--depfiles]) || am_rc=$?
+  done
+  if test $am_rc -ne 0; then
+    AC_MSG_FAILURE([Something went wrong bootstrapping makefile fragments
+    for automatic dependency tracking.  If GNU make was not used, consider
+    re-running the configure script with MAKE="gmake" (or whatever is
+    necessary).  You can also try re-running configure with the
+    '--disable-dependency-tracking' option to at least be able to build
+    the package (albeit without support for automatic dependency tracking).])
+  fi
+  AS_UNSET([am_dirpart])
+  AS_UNSET([am_filepart])
+  AS_UNSET([am_mf])
+  AS_UNSET([am_rc])
+  rm -f conftest-deps.mk
+}
+])# _AM_OUTPUT_DEPENDENCY_COMMANDS
+
+
+# AM_OUTPUT_DEPENDENCY_COMMANDS
+# -----------------------------
+# This macro should only be invoked once -- use via AC_REQUIRE.
+#
+# This code is only required when automatic dependency tracking is enabled.
+# This creates each '.Po' and '.Plo' makefile fragment that we'll need in
+# order to bootstrap the dependency handling code.
+AC_DEFUN([AM_OUTPUT_DEPENDENCY_COMMANDS],
+[AC_CONFIG_COMMANDS([depfiles],
+     [test x"$AMDEP_TRUE" != x"" || _AM_OUTPUT_DEPENDENCY_COMMANDS],
+     [AMDEP_TRUE="$AMDEP_TRUE" MAKE="${MAKE-make}"])])
+
+# Do all the work for Automake.                             -*- Autoconf -*-
+
+# Copyright (C) 1996-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This macro actually does too much.  Some checks are only needed if
+# your package does certain things.  But this isn't really a big deal.
+
+dnl Redefine AC_PROG_CC to automatically invoke _AM_PROG_CC_C_O.
+m4_define([AC_PROG_CC],
+m4_defn([AC_PROG_CC])
+[_AM_PROG_CC_C_O
+])
+
+# AM_INIT_AUTOMAKE(PACKAGE, VERSION, [NO-DEFINE])
+# AM_INIT_AUTOMAKE([OPTIONS])
+# -----------------------------------------------
+# The call with PACKAGE and VERSION arguments is the old style
+# call (pre autoconf-2.50), which is being phased out.  PACKAGE
+# and VERSION should now be passed to AC_INIT and removed from
+# the call to AM_INIT_AUTOMAKE.
+# We support both call styles for the transition.  After
+# the next Automake release, Autoconf can make the AC_INIT
+# arguments mandatory, and then we can depend on a new Autoconf
+# release and drop the old call support.
+AC_DEFUN([AM_INIT_AUTOMAKE],
+[AC_PREREQ([2.65])dnl
+dnl Autoconf wants to disallow AM_ names.  We explicitly allow
+dnl the ones we care about.
+m4_pattern_allow([^AM_[A-Z]+FLAGS$])dnl
+AC_REQUIRE([AM_SET_CURRENT_AUTOMAKE_VERSION])dnl
+AC_REQUIRE([AC_PROG_INSTALL])dnl
+if test "`cd $srcdir && pwd`" != "`pwd`"; then
+  # Use -I$(srcdir) only when $(srcdir) != ., so that make's output
+  # is not polluted with repeated "-I."
+  AC_SUBST([am__isrc], [' -I$(srcdir)'])_AM_SUBST_NOTMAKE([am__isrc])dnl
+  # test to see if srcdir already configured
+  if test -f $srcdir/config.status; then
+    AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
+  fi
+fi
+
+# test whether we have cygpath
+if test -z "$CYGPATH_W"; then
+  if (cygpath --version) >/dev/null 2>/dev/null; then
+    CYGPATH_W='cygpath -w'
+  else
+    CYGPATH_W=echo
+  fi
+fi
+AC_SUBST([CYGPATH_W])
+
+# Define the identity of the package.
+dnl Distinguish between old-style and new-style calls.
+m4_ifval([$2],
+[AC_DIAGNOSE([obsolete],
+             [$0: two- and three-arguments forms are deprecated.])
+m4_ifval([$3], [_AM_SET_OPTION([no-define])])dnl
+ AC_SUBST([PACKAGE], [$1])dnl
+ AC_SUBST([VERSION], [$2])],
+[_AM_SET_OPTIONS([$1])dnl
+dnl Diagnose old-style AC_INIT with new-style AM_AUTOMAKE_INIT.
+m4_if(
+  m4_ifset([AC_PACKAGE_NAME], [ok]):m4_ifset([AC_PACKAGE_VERSION], [ok]),
+  [ok:ok],,
+  [m4_fatal([AC_INIT should be called with package and version arguments])])dnl
+ AC_SUBST([PACKAGE], ['AC_PACKAGE_TARNAME'])dnl
+ AC_SUBST([VERSION], ['AC_PACKAGE_VERSION'])])dnl
+
+_AM_IF_OPTION([no-define],,
+[AC_DEFINE_UNQUOTED([PACKAGE], ["$PACKAGE"], [Name of package])
+ AC_DEFINE_UNQUOTED([VERSION], ["$VERSION"], [Version number of package])])dnl
+
+# Some tools Automake needs.
+AC_REQUIRE([AM_SANITY_CHECK])dnl
+AC_REQUIRE([AC_ARG_PROGRAM])dnl
+AM_MISSING_PROG([ACLOCAL], [aclocal-${am__api_version}])
+AM_MISSING_PROG([AUTOCONF], [autoconf])
+AM_MISSING_PROG([AUTOMAKE], [automake-${am__api_version}])
+AM_MISSING_PROG([AUTOHEADER], [autoheader])
+AM_MISSING_PROG([MAKEINFO], [makeinfo])
+AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
+AC_REQUIRE([AM_PROG_INSTALL_STRIP])dnl
+AC_REQUIRE([AC_PROG_MKDIR_P])dnl
+# For better backward compatibility.  To be removed once Automake 1.9.x
+# dies out for good.  For more background, see:
+# <https://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
+# <https://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
+AC_SUBST([mkdir_p], ['$(MKDIR_P)'])
+# We need awk for the "check" target (and possibly the TAP driver).  The
+# system "awk" is bad on some platforms.
+AC_REQUIRE([AC_PROG_AWK])dnl
+AC_REQUIRE([AC_PROG_MAKE_SET])dnl
+AC_REQUIRE([AM_SET_LEADING_DOT])dnl
+_AM_IF_OPTION([tar-ustar], [_AM_PROG_TAR([ustar])],
+	      [_AM_IF_OPTION([tar-pax], [_AM_PROG_TAR([pax])],
+			     [_AM_PROG_TAR([v7])])])
+_AM_IF_OPTION([no-dependencies],,
+[AC_PROVIDE_IFELSE([AC_PROG_CC],
+		  [_AM_DEPENDENCIES([CC])],
+		  [m4_define([AC_PROG_CC],
+			     m4_defn([AC_PROG_CC])[_AM_DEPENDENCIES([CC])])])dnl
+AC_PROVIDE_IFELSE([AC_PROG_CXX],
+		  [_AM_DEPENDENCIES([CXX])],
+		  [m4_define([AC_PROG_CXX],
+			     m4_defn([AC_PROG_CXX])[_AM_DEPENDENCIES([CXX])])])dnl
+AC_PROVIDE_IFELSE([AC_PROG_OBJC],
+		  [_AM_DEPENDENCIES([OBJC])],
+		  [m4_define([AC_PROG_OBJC],
+			     m4_defn([AC_PROG_OBJC])[_AM_DEPENDENCIES([OBJC])])])dnl
+AC_PROVIDE_IFELSE([AC_PROG_OBJCXX],
+		  [_AM_DEPENDENCIES([OBJCXX])],
+		  [m4_define([AC_PROG_OBJCXX],
+			     m4_defn([AC_PROG_OBJCXX])[_AM_DEPENDENCIES([OBJCXX])])])dnl
+])
+# Variables for tags utilities; see am/tags.am
+if test -z "$CTAGS"; then
+  CTAGS=ctags
+fi
+AC_SUBST([CTAGS])
+if test -z "$ETAGS"; then
+  ETAGS=etags
+fi
+AC_SUBST([ETAGS])
+if test -z "$CSCOPE"; then
+  CSCOPE=cscope
+fi
+AC_SUBST([CSCOPE])
+
+AC_REQUIRE([AM_SILENT_RULES])dnl
+dnl The testsuite driver may need to know about EXEEXT, so add the
+dnl 'am__EXEEXT' conditional if _AM_COMPILER_EXEEXT was seen.  This
+dnl macro is hooked onto _AC_COMPILER_EXEEXT early, see below.
+AC_CONFIG_COMMANDS_PRE(dnl
+[m4_provide_if([_AM_COMPILER_EXEEXT],
+  [AM_CONDITIONAL([am__EXEEXT], [test -n "$EXEEXT"])])])dnl
+
+# POSIX will say in a future version that running "rm -f" with no argument
+# is OK; and we want to be able to make that assumption in our Makefile
+# recipes.  So use an aggressive probe to check that the usage we want is
+# actually supported "in the wild" to an acceptable degree.
+# See automake bug#10828.
+# To make any issue more visible, cause the running configure to be aborted
+# by default if the 'rm' program in use doesn't match our expectations; the
+# user can still override this though.
+if rm -f && rm -fr && rm -rf; then : OK; else
+  cat >&2 <<'END'
+Oops!
+
+Your 'rm' program seems unable to run without file operands specified
+on the command line, even when the '-f' option is present.  This is contrary
+to the behaviour of most rm programs out there, and not conforming with
+the upcoming POSIX standard: <http://austingroupbugs.net/view.php?id=542>
+
+Please tell bug-automake@gnu.org about your system, including the value
+of your $PATH and any error possibly output before this message.  This
+can help us improve future automake versions.
+
+END
+  if test x"$ACCEPT_INFERIOR_RM_PROGRAM" = x"yes"; then
+    echo 'Configuration will proceed anyway, since you have set the' >&2
+    echo 'ACCEPT_INFERIOR_RM_PROGRAM variable to "yes"' >&2
+    echo >&2
+  else
+    cat >&2 <<'END'
+Aborting the configuration process, to ensure you take notice of the issue.
+
+You can download and install GNU coreutils to get an 'rm' implementation
+that behaves properly: <https://www.gnu.org/software/coreutils/>.
+
+If you want to complete the configuration process using your problematic
+'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM
+to "yes", and re-run configure.
+
+END
+    AC_MSG_ERROR([Your 'rm' program is bad, sorry.])
+  fi
+fi
+dnl The trailing newline in this macro's definition is deliberate, for
+dnl backward compatibility and to allow trailing 'dnl'-style comments
+dnl after the AM_INIT_AUTOMAKE invocation. See automake bug#16841.
+])
+
+dnl Hook into '_AC_COMPILER_EXEEXT' early to learn its expansion.  Do not
+dnl add the conditional right here, as _AC_COMPILER_EXEEXT may be further
+dnl mangled by Autoconf and run in a shell conditional statement.
+m4_define([_AC_COMPILER_EXEEXT],
+m4_defn([_AC_COMPILER_EXEEXT])[m4_provide([_AM_COMPILER_EXEEXT])])
+
+# When config.status generates a header, we must update the stamp-h file.
+# This file resides in the same directory as the config header
+# that is generated.  The stamp files are numbered to have different names.
+
+# Autoconf calls _AC_AM_CONFIG_HEADER_HOOK (when defined) in the
+# loop where config.status creates the headers, so we can generate
+# our stamp files there.
+AC_DEFUN([_AC_AM_CONFIG_HEADER_HOOK],
+[# Compute $1's index in $config_headers.
+_am_arg=$1
+_am_stamp_count=1
+for _am_header in $config_headers :; do
+  case $_am_header in
+    $_am_arg | $_am_arg:* )
+      break ;;
+    * )
+      _am_stamp_count=`expr $_am_stamp_count + 1` ;;
+  esac
+done
+echo "timestamp for $_am_arg" >`AS_DIRNAME(["$_am_arg"])`/stamp-h[]$_am_stamp_count])
+
+# Copyright (C) 2001-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_PROG_INSTALL_SH
+# ------------------
+# Define $install_sh.
+AC_DEFUN([AM_PROG_INSTALL_SH],
+[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
+if test x"${install_sh+set}" != xset; then
+  case $am_aux_dir in
+  *\ * | *\	*)
+    install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;;
+  *)
+    install_sh="\${SHELL} $am_aux_dir/install-sh"
+  esac
+fi
+AC_SUBST([install_sh])])
+
+# Copyright (C) 2003-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# Check whether the underlying file-system supports filenames
+# with a leading dot.  For instance MS-DOS doesn't.
+AC_DEFUN([AM_SET_LEADING_DOT],
+[rm -rf .tst 2>/dev/null
+mkdir .tst 2>/dev/null
+if test -d .tst; then
+  am__leading_dot=.
+else
+  am__leading_dot=_
+fi
+rmdir .tst 2>/dev/null
+AC_SUBST([am__leading_dot])])
+
+# Check to see how 'make' treats includes.	            -*- Autoconf -*-
+
+# Copyright (C) 2001-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_MAKE_INCLUDE()
+# -----------------
+# Check whether make has an 'include' directive that can support all
+# the idioms we need for our automatic dependency tracking code.
+AC_DEFUN([AM_MAKE_INCLUDE],
+[AC_MSG_CHECKING([whether ${MAKE-make} supports the include directive])
+cat > confinc.mk << 'END'
+am__doit:
+	@echo this is the am__doit target >confinc.out
+.PHONY: am__doit
+END
+am__include="#"
+am__quote=
+# BSD make does it like this.
+echo '.include "confinc.mk" # ignored' > confmf.BSD
+# Other make implementations (GNU, Solaris 10, AIX) do it like this.
+echo 'include confinc.mk # ignored' > confmf.GNU
+_am_result=no
+for s in GNU BSD; do
+  AM_RUN_LOG([${MAKE-make} -f confmf.$s && cat confinc.out])
+  AS_CASE([$?:`cat confinc.out 2>/dev/null`],
+      ['0:this is the am__doit target'],
+      [AS_CASE([$s],
+          [BSD], [am__include='.include' am__quote='"'],
+          [am__include='include' am__quote=''])])
+  if test "$am__include" != "#"; then
+    _am_result="yes ($s style)"
+    break
+  fi
+done
+rm -f confinc.* confmf.*
+AC_MSG_RESULT([${_am_result}])
+AC_SUBST([am__include])])
+AC_SUBST([am__quote])])
+
+# Fake the existence of programs that GNU maintainers use.  -*- Autoconf -*-
+
+# Copyright (C) 1997-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_MISSING_PROG(NAME, PROGRAM)
+# ------------------------------
+AC_DEFUN([AM_MISSING_PROG],
+[AC_REQUIRE([AM_MISSING_HAS_RUN])
+$1=${$1-"${am_missing_run}$2"}
+AC_SUBST($1)])
+
+# AM_MISSING_HAS_RUN
+# ------------------
+# Define MISSING if not defined so far and test if it is modern enough.
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+AC_DEFUN([AM_MISSING_HAS_RUN],
+[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
+AC_REQUIRE_AUX_FILE([missing])dnl
+if test x"${MISSING+set}" != xset; then
+  MISSING="\${SHELL} '$am_aux_dir/missing'"
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+# Use eval to expand $SHELL
+if eval "$MISSING --is-lightweight"; then
+  am_missing_run="$MISSING "
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+  am_missing_run=
+  AC_MSG_WARN(['missing' script is too old or missing])
+fi
+])
+
+# Helper functions for option handling.                     -*- Autoconf -*-
+
+# Copyright (C) 2001-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# _AM_MANGLE_OPTION(NAME)
+# -----------------------
+AC_DEFUN([_AM_MANGLE_OPTION],
+[[_AM_OPTION_]m4_bpatsubst($1, [[^a-zA-Z0-9_]], [_])])
+
+# _AM_SET_OPTION(NAME)
+# --------------------
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+AC_DEFUN([_AM_SET_OPTION],
+[m4_define(_AM_MANGLE_OPTION([$1]), [1])])
+
+# _AM_SET_OPTIONS(OPTIONS)
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+AC_DEFUN([_AM_SET_OPTIONS],
+[m4_foreach_w([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])])
+
+# _AM_IF_OPTION(OPTION, IF-SET, [IF-NOT-SET])
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+AC_DEFUN([_AM_IF_OPTION],
+[m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])
+
+# Copyright (C) 1999-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# _AM_PROG_CC_C_O
+# ---------------
+# Like AC_PROG_CC_C_O, but changed for automake.  We rewrite AC_PROG_CC
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+AC_DEFUN([_AM_PROG_CC_C_O],
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+AC_REQUIRE_AUX_FILE([compile])dnl
+AC_LANG_PUSH([C])dnl
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+  # Make sure it works both with $CC and with simple cc.
+  # Following AC_PROG_CC_C_O, we do the test twice because some
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+  # though they will create one.
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+  for am_i in 1 2; do
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+  rm -f core conftest*
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+   # FIXME: It is wrong to rewrite CC.
+   # But if we don't then we get into trouble of one sort or another.
+   # A longer-term fix would be to have automake use am__CC in this case,
+   # and then we could set am__CC="\$(top_srcdir)/compile \$(CC)"
+   CC="$am_aux_dir/compile $CC"
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+AC_LANG_POP([C])])
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+# For backward compatibility.
+AC_DEFUN_ONCE([AM_PROG_CC_C_O], [AC_REQUIRE([AC_PROG_CC])])
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+# Copyright (C) 2001-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_RUN_LOG(COMMAND)
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+AC_DEFUN([AM_RUN_LOG],
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+   (exit $ac_status); }])
+
+# Check to make sure that the build environment is sane.    -*- Autoconf -*-
+
+# Copyright (C) 1996-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_SANITY_CHECK
+# ---------------
+AC_DEFUN([AM_SANITY_CHECK],
+[AC_MSG_CHECKING([whether build environment is sane])
+# Reject unsafe characters in $srcdir or the absolute working directory
+# name.  Accept space and tab only in the latter.
+am_lf='
+'
+case `pwd` in
+  *[[\\\"\#\$\&\'\`$am_lf]]*)
+    AC_MSG_ERROR([unsafe absolute working directory name]);;
+esac
+case $srcdir in
+  *[[\\\"\#\$\&\'\`$am_lf\ \	]]*)
+    AC_MSG_ERROR([unsafe srcdir value: '$srcdir']);;
+esac
+
+# Do 'set' in a subshell so we don't clobber the current shell's
+# arguments.  Must try -L first in case configure is actually a
+# symlink; some systems play weird games with the mod time of symlinks
+# (eg FreeBSD returns the mod time of the symlink's containing
+# directory).
+if (
+   am_has_slept=no
+   for am_try in 1 2; do
+     echo "timestamp, slept: $am_has_slept" > conftest.file
+     set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
+     if test "$[*]" = "X"; then
+	# -L didn't work.
+	set X `ls -t "$srcdir/configure" conftest.file`
+     fi
+     if test "$[*]" != "X $srcdir/configure conftest.file" \
+	&& test "$[*]" != "X conftest.file $srcdir/configure"; then
+
+	# If neither matched, then we have a broken ls.  This can happen
+	# if, for instance, CONFIG_SHELL is bash and it inherits a
+	# broken ls alias from the environment.  This has actually
+	# happened.  Such a system could not be considered "sane".
+	AC_MSG_ERROR([ls -t appears to fail.  Make sure there is not a broken
+  alias in your environment])
+     fi
+     if test "$[2]" = conftest.file || test $am_try -eq 2; then
+       break
+     fi
+     # Just in case.
+     sleep 1
+     am_has_slept=yes
+   done
+   test "$[2]" = conftest.file
+   )
+then
+   # Ok.
+   :
+else
+   AC_MSG_ERROR([newly created file is older than distributed files!
+Check your system clock])
+fi
+AC_MSG_RESULT([yes])
+# If we didn't sleep, we still need to ensure time stamps of config.status and
+# generated files are strictly newer.
+am_sleep_pid=
+if grep 'slept: no' conftest.file >/dev/null 2>&1; then
+  ( sleep 1 ) &
+  am_sleep_pid=$!
+fi
+AC_CONFIG_COMMANDS_PRE(
+  [AC_MSG_CHECKING([that generated files are newer than configure])
+   if test -n "$am_sleep_pid"; then
+     # Hide warnings about reused PIDs.
+     wait $am_sleep_pid 2>/dev/null
+   fi
+   AC_MSG_RESULT([done])])
+rm -f conftest.file
+])
+
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_SILENT_RULES([DEFAULT])
+# --------------------------
+# Enable less verbose build rules; with the default set to DEFAULT
+# ("yes" being less verbose, "no" or empty being verbose).
+AC_DEFUN([AM_SILENT_RULES],
+[AC_ARG_ENABLE([silent-rules], [dnl
+AS_HELP_STRING(
+  [--enable-silent-rules],
+  [less verbose build output (undo: "make V=1")])
+AS_HELP_STRING(
+  [--disable-silent-rules],
+  [verbose build output (undo: "make V=0")])dnl
+])
+case $enable_silent_rules in @%:@ (((
+  yes) AM_DEFAULT_VERBOSITY=0;;
+   no) AM_DEFAULT_VERBOSITY=1;;
+    *) AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1]);;
+esac
+dnl
+dnl A few 'make' implementations (e.g., NonStop OS and NextStep)
+dnl do not support nested variable expansions.
+dnl See automake bug#9928 and bug#10237.
+am_make=${MAKE-make}
+AC_CACHE_CHECK([whether $am_make supports nested variables],
+   [am_cv_make_support_nested_variables],
+   [if AS_ECHO([['TRUE=$(BAR$(V))
+BAR0=false
+BAR1=true
+V=1
+am__doit:
+	@$(TRUE)
+.PHONY: am__doit']]) | $am_make -f - >/dev/null 2>&1; then
+  am_cv_make_support_nested_variables=yes
+else
+  am_cv_make_support_nested_variables=no
+fi])
+if test $am_cv_make_support_nested_variables = yes; then
+  dnl Using '$V' instead of '$(V)' breaks IRIX make.
+  AM_V='$(V)'
+  AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
+else
+  AM_V=$AM_DEFAULT_VERBOSITY
+  AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
+fi
+AC_SUBST([AM_V])dnl
+AM_SUBST_NOTMAKE([AM_V])dnl
+AC_SUBST([AM_DEFAULT_V])dnl
+AM_SUBST_NOTMAKE([AM_DEFAULT_V])dnl
+AC_SUBST([AM_DEFAULT_VERBOSITY])dnl
+AM_BACKSLASH='\'
+AC_SUBST([AM_BACKSLASH])dnl
+_AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl
+])
+
+# Copyright (C) 2001-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_PROG_INSTALL_STRIP
+# ---------------------
+# One issue with vendor 'install' (even GNU) is that you can't
+# specify the program used to strip binaries.  This is especially
+# annoying in cross-compiling environments, where the build's strip
+# is unlikely to handle the host's binaries.
+# Fortunately install-sh will honor a STRIPPROG variable, so we
+# always use install-sh in "make install-strip", and initialize
+# STRIPPROG with the value of the STRIP variable (set by the user).
+AC_DEFUN([AM_PROG_INSTALL_STRIP],
+[AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
+# Installed binaries are usually stripped using 'strip' when the user
+# run "make install-strip".  However 'strip' might not be the right
+# tool to use in cross-compilation environments, therefore Automake
+# will honor the 'STRIP' environment variable to overrule this program.
+dnl Don't test for $cross_compiling = yes, because it might be 'maybe'.
+if test "$cross_compiling" != no; then
+  AC_CHECK_TOOL([STRIP], [strip], :)
+fi
+INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
+AC_SUBST([INSTALL_STRIP_PROGRAM])])
+
+# Copyright (C) 2006-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# _AM_SUBST_NOTMAKE(VARIABLE)
+# ---------------------------
+# Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in.
+# This macro is traced by Automake.
+AC_DEFUN([_AM_SUBST_NOTMAKE])
+
+# AM_SUBST_NOTMAKE(VARIABLE)
+# --------------------------
+# Public sister of _AM_SUBST_NOTMAKE.
+AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
+
+# Check how to create a tarball.                            -*- Autoconf -*-
+
+# Copyright (C) 2004-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# _AM_PROG_TAR(FORMAT)
+# --------------------
+# Check how to create a tarball in format FORMAT.
+# FORMAT should be one of 'v7', 'ustar', or 'pax'.
+#
+# Substitute a variable $(am__tar) that is a command
+# writing to stdout a FORMAT-tarball containing the directory
+# $tardir.
+#     tardir=directory && $(am__tar) > result.tar
+#
+# Substitute a variable $(am__untar) that extract such
+# a tarball read from stdin.
+#     $(am__untar) < result.tar
+#
+AC_DEFUN([_AM_PROG_TAR],
+[# Always define AMTAR for backward compatibility.  Yes, it's still used
+# in the wild :-(  We should find a proper way to deprecate it ...
+AC_SUBST([AMTAR], ['$${TAR-tar}'])
+
+# We'll loop over all known methods to create a tar archive until one works.
+_am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'
+
+m4_if([$1], [v7],
+  [am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'],
+
+  [m4_case([$1],
+    [ustar],
+     [# The POSIX 1988 'ustar' format is defined with fixed-size fields.
+      # There is notably a 21 bits limit for the UID and the GID.  In fact,
+      # the 'pax' utility can hang on bigger UID/GID (see automake bug#8343
+      # and bug#13588).
+      am_max_uid=2097151 # 2^21 - 1
+      am_max_gid=$am_max_uid
+      # The $UID and $GID variables are not portable, so we need to resort
+      # to the POSIX-mandated id(1) utility.  Errors in the 'id' calls
+      # below are definitely unexpected, so allow the users to see them
+      # (that is, avoid stderr redirection).
+      am_uid=`id -u || echo unknown`
+      am_gid=`id -g || echo unknown`
+      AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format])
+      if test $am_uid -le $am_max_uid; then
+         AC_MSG_RESULT([yes])
+      else
+         AC_MSG_RESULT([no])
+         _am_tools=none
+      fi
+      AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format])
+      if test $am_gid -le $am_max_gid; then
+         AC_MSG_RESULT([yes])
+      else
+        AC_MSG_RESULT([no])
+        _am_tools=none
+      fi],
+
+  [pax],
+    [],
+
+  [m4_fatal([Unknown tar format])])
+
+  AC_MSG_CHECKING([how to create a $1 tar archive])
+
+  # Go ahead even if we have the value already cached.  We do so because we
+  # need to set the values for the 'am__tar' and 'am__untar' variables.
+  _am_tools=${am_cv_prog_tar_$1-$_am_tools}
+
+  for _am_tool in $_am_tools; do
+    case $_am_tool in
+    gnutar)
+      for _am_tar in tar gnutar gtar; do
+        AM_RUN_LOG([$_am_tar --version]) && break
+      done
+      am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
+      am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
+      am__untar="$_am_tar -xf -"
+      ;;
+    plaintar)
+      # Must skip GNU tar: if it does not support --format= it doesn't create
+      # ustar tarball either.
+      (tar --version) >/dev/null 2>&1 && continue
+      am__tar='tar chf - "$$tardir"'
+      am__tar_='tar chf - "$tardir"'
+      am__untar='tar xf -'
+      ;;
+    pax)
+      am__tar='pax -L -x $1 -w "$$tardir"'
+      am__tar_='pax -L -x $1 -w "$tardir"'
+      am__untar='pax -r'
+      ;;
+    cpio)
+      am__tar='find "$$tardir" -print | cpio -o -H $1 -L'
+      am__tar_='find "$tardir" -print | cpio -o -H $1 -L'
+      am__untar='cpio -i -H $1 -d'
+      ;;
+    none)
+      am__tar=false
+      am__tar_=false
+      am__untar=false
+      ;;
+    esac
+
+    # If the value was cached, stop now.  We just wanted to have am__tar
+    # and am__untar set.
+    test -n "${am_cv_prog_tar_$1}" && break
+
+    # tar/untar a dummy directory, and stop if the command works.
+    rm -rf conftest.dir
+    mkdir conftest.dir
+    echo GrepMe > conftest.dir/file
+    AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
+    rm -rf conftest.dir
+    if test -s conftest.tar; then
+      AM_RUN_LOG([$am__untar <conftest.tar])
+      AM_RUN_LOG([cat conftest.dir/file])
+      grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
+    fi
+  done
+  rm -rf conftest.dir
+
+  AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
+  AC_MSG_RESULT([$am_cv_prog_tar_$1])])
+
+AC_SUBST([am__tar])
+AC_SUBST([am__untar])
+]) # _AM_PROG_TAR
+
+m4_include([m4/00gnulib.m4])
+m4_include([m4/__inline.m4])
+m4_include([m4/absolute-header.m4])
+m4_include([m4/alloca.m4])
+m4_include([m4/arpa_inet_h.m4])
+m4_include([m4/asm-underscore.m4])
+m4_include([m4/assert.m4])
+m4_include([m4/btowc.m4])
+m4_include([m4/builtin-expect.m4])
+m4_include([m4/c-stack.m4])
+m4_include([m4/calloc.m4])
+m4_include([m4/chdir-long.m4])
+m4_include([m4/close.m4])
+m4_include([m4/closedir.m4])
+m4_include([m4/codeset.m4])
+m4_include([m4/configmake.m4])
+m4_include([m4/ctype_h.m4])
+m4_include([m4/cycle-check.m4])
+m4_include([m4/d-ino.m4])
+m4_include([m4/d-type.m4])
+m4_include([m4/dirent_h.m4])
+m4_include([m4/dirfd.m4])
+m4_include([m4/double-slash-root.m4])
+m4_include([m4/dup.m4])
+m4_include([m4/dup2.m4])
+m4_include([m4/eealloc.m4])
+m4_include([m4/environ.m4])
+m4_include([m4/errno_h.m4])
+m4_include([m4/error.m4])
+m4_include([m4/exponentd.m4])
+m4_include([m4/extensions.m4])
+m4_include([m4/extern-inline.m4])
+m4_include([m4/fchdir.m4])
+m4_include([m4/fcntl-o.m4])
+m4_include([m4/fcntl-safer.m4])
+m4_include([m4/fcntl.m4])
+m4_include([m4/fcntl_h.m4])
+m4_include([m4/fdopen.m4])
+m4_include([m4/fdopendir.m4])
+m4_include([m4/filenamecat.m4])
+m4_include([m4/flexmember.m4])
+m4_include([m4/float_h.m4])
+m4_include([m4/fnmatch.m4])
+m4_include([m4/fnmatch_h.m4])
+m4_include([m4/fopen.m4])
+m4_include([m4/fpending.m4])
+m4_include([m4/fpieee.m4])
+m4_include([m4/free.m4])
+m4_include([m4/fstat.m4])
+m4_include([m4/fstatat.m4])
+m4_include([m4/ftruncate.m4])
+m4_include([m4/fts.m4])
+m4_include([m4/getcwd.m4])
+m4_include([m4/getdtablesize.m4])
+m4_include([m4/getopt.m4])
+m4_include([m4/getpagesize.m4])
+m4_include([m4/getprogname.m4])
+m4_include([m4/gettext.m4])
+m4_include([m4/gettimeofday.m4])
+m4_include([m4/gnulib-common.m4])
+m4_include([m4/gnulib-comp.m4])
+m4_include([m4/host-cpu-c-abi.m4])
+m4_include([m4/i-ring.m4])
+m4_include([m4/iconv.m4])
+m4_include([m4/iconv_h.m4])
+m4_include([m4/iconv_open.m4])
+m4_include([m4/include_next.m4])
+m4_include([m4/inet_pton.m4])
+m4_include([m4/inline.m4])
+m4_include([m4/intl-thread-locale.m4])
+m4_include([m4/intlmacosx.m4])
+m4_include([m4/intmax_t.m4])
+m4_include([m4/inttostr.m4])
+m4_include([m4/inttypes.m4])
+m4_include([m4/inttypes_h.m4])
+m4_include([m4/ioctl.m4])
+m4_include([m4/isatty.m4])
+m4_include([m4/isblank.m4])
+m4_include([m4/iswblank.m4])
+m4_include([m4/iswctype.m4])
+m4_include([m4/iswdigit.m4])
+m4_include([m4/iswxdigit.m4])
+m4_include([m4/langinfo_h.m4])
+m4_include([m4/largefile.m4])
+m4_include([m4/lcmessage.m4])
+m4_include([m4/lib-ld.m4])
+m4_include([m4/lib-link.m4])
+m4_include([m4/lib-prefix.m4])
+m4_include([m4/libsigsegv.m4])
+m4_include([m4/libunistring-base.m4])
+m4_include([m4/limits-h.m4])
+m4_include([m4/localcharset.m4])
+m4_include([m4/locale-fr.m4])
+m4_include([m4/locale-ja.m4])
+m4_include([m4/locale-tr.m4])
+m4_include([m4/locale-zh.m4])
+m4_include([m4/locale_h.m4])
+m4_include([m4/localeconv.m4])
+m4_include([m4/localename.m4])
+m4_include([m4/lock.m4])
+m4_include([m4/lseek.m4])
+m4_include([m4/lstat.m4])
+m4_include([m4/malloc.m4])
+m4_include([m4/malloca.m4])
+m4_include([m4/manywarnings.m4])
+m4_include([m4/mbchar.m4])
+m4_include([m4/mbiter.m4])
+m4_include([m4/mbrlen.m4])
+m4_include([m4/mbrtowc.m4])
+m4_include([m4/mbsinit.m4])
+m4_include([m4/mbslen.m4])
+m4_include([m4/mbsrtowcs.m4])
+m4_include([m4/mbstate_t.m4])
+m4_include([m4/mbtowc.m4])
+m4_include([m4/memchr.m4])
+m4_include([m4/mempcpy.m4])
+m4_include([m4/memrchr.m4])
+m4_include([m4/minmax.m4])
+m4_include([m4/mmap-anon.m4])
+m4_include([m4/mode_t.m4])
+m4_include([m4/msvc-inval.m4])
+m4_include([m4/msvc-nothrow.m4])
+m4_include([m4/multiarch.m4])
+m4_include([m4/musl.m4])
+m4_include([m4/nanosleep.m4])
+m4_include([m4/netinet_in_h.m4])
+m4_include([m4/nl_langinfo.m4])
+m4_include([m4/nls.m4])
+m4_include([m4/nocrash.m4])
+m4_include([m4/obstack.m4])
+m4_include([m4/off_t.m4])
+m4_include([m4/open-cloexec.m4])
+m4_include([m4/open-slash.m4])
+m4_include([m4/open.m4])
+m4_include([m4/openat.m4])
+m4_include([m4/opendir.m4])
+m4_include([m4/pathmax.m4])
+m4_include([m4/pcre.m4])
+m4_include([m4/perl.m4])
+m4_include([m4/perror.m4])
+m4_include([m4/pipe.m4])
+m4_include([m4/pkg.m4])
+m4_include([m4/po.m4])
+m4_include([m4/printf.m4])
+m4_include([m4/progtest.m4])
+m4_include([m4/pthread-thread.m4])
+m4_include([m4/pthread_h.m4])
+m4_include([m4/pthread_rwlock_rdlock.m4])
+m4_include([m4/pthread_sigmask.m4])
+m4_include([m4/putenv.m4])
+m4_include([m4/quote.m4])
+m4_include([m4/quotearg.m4])
+m4_include([m4/raise.m4])
+m4_include([m4/rawmemchr.m4])
+m4_include([m4/read.m4])
+m4_include([m4/readdir.m4])
+m4_include([m4/realloc.m4])
+m4_include([m4/reallocarray.m4])
+m4_include([m4/regex.m4])
+m4_include([m4/safe-read.m4])
+m4_include([m4/save-cwd.m4])
+m4_include([m4/sched_h.m4])
+m4_include([m4/select.m4])
+m4_include([m4/setenv.m4])
+m4_include([m4/setlocale.m4])
+m4_include([m4/setlocale_null.m4])
+m4_include([m4/sigaction.m4])
+m4_include([m4/sigaltstack.m4])
+m4_include([m4/signal_h.m4])
+m4_include([m4/signalblocking.m4])
+m4_include([m4/size_max.m4])
+m4_include([m4/sleep.m4])
+m4_include([m4/snprintf.m4])
+m4_include([m4/socketlib.m4])
+m4_include([m4/sockets.m4])
+m4_include([m4/socklen.m4])
+m4_include([m4/sockpfaf.m4])
+m4_include([m4/ssize_t.m4])
+m4_include([m4/stack-direction.m4])
+m4_include([m4/stat-time.m4])
+m4_include([m4/stat.m4])
+m4_include([m4/stdalign.m4])
+m4_include([m4/stdarg.m4])
+m4_include([m4/stdbool.m4])
+m4_include([m4/stddef_h.m4])
+m4_include([m4/stdint.m4])
+m4_include([m4/stdint_h.m4])
+m4_include([m4/stdio_h.m4])
+m4_include([m4/stdlib_h.m4])
+m4_include([m4/stpcpy.m4])
+m4_include([m4/strdup.m4])
+m4_include([m4/strerror.m4])
+m4_include([m4/strerror_r.m4])
+m4_include([m4/string_h.m4])
+m4_include([m4/strnlen.m4])
+m4_include([m4/strstr.m4])
+m4_include([m4/strtoimax.m4])
+m4_include([m4/strtoll.m4])
+m4_include([m4/strtoull.m4])
+m4_include([m4/strtoumax.m4])
+m4_include([m4/symlink.m4])
+m4_include([m4/sys_ioctl_h.m4])
+m4_include([m4/sys_select_h.m4])
+m4_include([m4/sys_socket_h.m4])
+m4_include([m4/sys_stat_h.m4])
+m4_include([m4/sys_time_h.m4])
+m4_include([m4/sys_types_h.m4])
+m4_include([m4/sys_uio_h.m4])
+m4_include([m4/thread.m4])
+m4_include([m4/threadlib.m4])
+m4_include([m4/time_h.m4])
+m4_include([m4/unistd-safer.m4])
+m4_include([m4/unistd_h.m4])
+m4_include([m4/unlocked-io.m4])
+m4_include([m4/vasnprintf.m4])
+m4_include([m4/version-etc.m4])
+m4_include([m4/visibility.m4])
+m4_include([m4/warn-on-use.m4])
+m4_include([m4/warnings.m4])
+m4_include([m4/wchar_h.m4])
+m4_include([m4/wchar_t.m4])
+m4_include([m4/wcrtomb.m4])
+m4_include([m4/wctob.m4])
+m4_include([m4/wctomb.m4])
+m4_include([m4/wctype_h.m4])
+m4_include([m4/wcwidth.m4])
+m4_include([m4/windows-stat-inodes.m4])
+m4_include([m4/wint_t.m4])
+m4_include([m4/wmemchr.m4])
+m4_include([m4/wmempcpy.m4])
+m4_include([m4/xalloc.m4])
+m4_include([m4/xsize.m4])
+m4_include([m4/xstrtol.m4])
+m4_include([m4/year2038.m4])
+m4_include([m4/zzgnulib.m4])
diff --git a/src/grep/build-aux/announce-gen b/src/grep/build-aux/announce-gen
new file mode 100755
index 0000000..f3b5461
--- /dev/null
+++ b/src/grep/build-aux/announce-gen
@@ -0,0 +1,575 @@
+#!/bin/sh
+#! -*-perl-*-
+
+# Generate a release announcement message.
+
+# Copyright (C) 2002-2021 Free Software Foundation, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+# Written by Jim Meyering
+
+# This is a prologue that allows to run a perl script as an executable
+# on systems that are compliant to a POSIX version before POSIX:2017.
+# On such systems, the usual invocation of an executable through execlp()
+# or execvp() fails with ENOEXEC if it is a script that does not start
+# with a #! line.  The script interpreter mentioned in the #! line has
+# to be /bin/sh, because on GuixSD systems that is the only program that
+# has a fixed file name.  The second line is essential for perl and is
+# also useful for editing this file in Emacs.  The next two lines below
+# are valid code in both sh and perl.  When executed by sh, they re-execute
+# the script through the perl program found in $PATH.  The '-x' option
+# is essential as well; without it, perl would re-execute the script
+# through /bin/sh.  When executed by perl, the next two lines are a no-op.
+eval 'exec perl -wSx "$0" "$@"'
+     if 0;
+
+my $VERSION = '2021-08-04 09:17'; # UTC
+# The definition above must lie within the first 8 lines in order
+# for the Emacs time-stamp write hook (at end) to update it.
+# If you change this file with Emacs, please let the write hook
+# do its job.  Otherwise, update this string manually.
+
+my $copyright_year = '2021';
+
+use strict;
+use Getopt::Long;
+use POSIX qw(strftime);
+
+(my $ME = $0) =~ s|.*/||;
+
+my %valid_release_types = map {$_ => 1} qw (alpha beta stable);
+my @archive_suffixes = qw (tar.gz tar.bz2 tar.lz tar.lzma tar.xz);
+my $srcdir = '.';
+
+sub usage ($)
+{
+  my ($exit_code) = @_;
+  my $STREAM = ($exit_code == 0 ? *STDOUT : *STDERR);
+  if ($exit_code != 0)
+    {
+      print $STREAM "Try '$ME --help' for more information.\n";
+    }
+  else
+    {
+      my @types = sort keys %valid_release_types;
+      print $STREAM <<EOF;
+Usage: $ME [OPTIONS]
+Generate an announcement message.  Run this from builddir.
+
+OPTIONS:
+
+These options must be specified:
+
+   --release-type=TYPE          TYPE must be one of @types
+   --package-name=PACKAGE_NAME
+   --previous-version=VER
+   --current-version=VER
+   --gpg-key-id=ID         The GnuPG ID of the key used to sign the tarballs
+   --url-directory=URL_DIR
+
+The following are optional:
+
+   --news=NEWS_FILE             include the NEWS section about this release
+                                from this NEWS_FILE; accumulates.
+   --srcdir=DIR                 where to find the NEWS_FILEs (default: $srcdir)
+   --bootstrap-tools=TOOL_LIST  a comma-separated list of tools, e.g.,
+                                autoconf,automake,bison,gnulib
+   --gnulib-version=VERSION     report VERSION as the gnulib version, where
+                                VERSION is the result of running git describe
+                                in the gnulib source directory.
+                                required if gnulib is in TOOL_LIST.
+   --no-print-checksums         do not emit SHA1 or SHA256 checksums
+   --archive-suffix=SUF         add SUF to the list of archive suffixes
+   --mail-headers=HEADERS       a space-separated list of mail headers, e.g.,
+                                To: x\@example.com Cc: y-announce\@example.com,...
+
+   --help             display this help and exit
+   --version          output version information and exit
+
+EOF
+    }
+  exit $exit_code;
+}
+
+
+=item C<%size> = C<sizes (@file)>
+
+Compute the sizes of the C<@file> and return them as a hash.  Return
+C<undef> if one of the computation failed.
+
+=cut
+
+sub sizes (@)
+{
+  my (@file) = @_;
+
+  my $fail = 0;
+  my %res;
+  foreach my $f (@file)
+    {
+      my $cmd = "du -h $f";
+      my $t = `$cmd`;
+      # FIXME-someday: give a better diagnostic, a la $PROCESS_STATUS
+      $@
+        and (warn "command failed: '$cmd'\n"), $fail = 1;
+      chomp $t;
+      $t =~ s/^\s*([\d.]+[MkK]).*/${1}B/;
+      $res{$f} = $t;
+    }
+  return $fail ? undef : %res;
+}
+
+=item C<print_locations ($title, \@url, \%size, @file)
+
+Print a section C<$title> dedicated to the list of <@file>, which
+sizes are stored in C<%size>, and which are available from the C<@url>.
+
+=cut
+
+sub print_locations ($\@\%@)
+{
+  my ($title, $url, $size, @file) = @_;
+  print "Here are the $title:\n";
+  foreach my $url (@{$url})
+    {
+      for my $file (@file)
+        {
+          print "  $url/$file";
+          print "   (", $$size{$file}, ")"
+            if exists $$size{$file};
+          print "\n";
+        }
+    }
+  print "\n";
+}
+
+=item C<print_checksums (@file)
+
+Print the SHA1 and SHA256 signature section for each C<@file>.
+
+=cut
+
+sub print_checksums (@)
+{
+  my (@file) = @_;
+
+  print "Here are the SHA1 and SHA256 checksums:\n";
+  print "\n";
+
+  use Digest::file qw(digest_file_hex digest_file_base64);
+
+  foreach my $f (@file)
+    {
+      print digest_file_hex($f, "SHA-1"), "  $f\n";
+      print digest_file_base64($f, "SHA-256"), "  $f\n";
+    }
+  print "\nThe SHA256 checksum is base64 encoded, instead of the\n";
+  print "hexadecimal encoding that most checksum tools default to.\n\n";
+}
+
+=item C<print_news_deltas ($news_file, $prev_version, $curr_version)
+
+Print the section of the NEWS file C<$news_file> addressing changes
+between versions C<$prev_version> and C<$curr_version>.
+
+=cut
+
+sub print_news_deltas ($$$)
+{
+  my ($news_file, $prev_version, $curr_version) = @_;
+
+  my $news_name = $news_file;
+  $news_name =~ s|^\Q$srcdir\E/||;
+
+  print "\n$news_name\n\n";
+
+  # Print all lines from $news_file, starting with the first one
+  # that mentions $curr_version up to but not including
+  # the first occurrence of $prev_version.
+  my $in_items;
+
+  my $re_prefix = qr/(?:\* )?(?:Noteworthy c|Major c|C)(?i:hanges)/;
+
+  my $found_news;
+  open NEWS, '<', $news_file
+    or die "$ME: $news_file: cannot open for reading: $!\n";
+  while (defined (my $line = <NEWS>))
+    {
+      if ( ! $in_items)
+        {
+          # Match lines like these:
+          # * Major changes in release 5.0.1:
+          # * Noteworthy changes in release 6.6 (2006-11-22) [stable]
+          $line =~ /^$re_prefix.*(?:[^\d.]|$)\Q$curr_version\E(?:[^\d.]|$)/o
+            or next;
+          $in_items = 1;
+          print $line;
+        }
+      else
+        {
+          # This regexp must not match version numbers in NEWS items.
+          # For example, they might well say "introduced in 4.5.5",
+          # and we don't want that to match.
+          $line =~ /^$re_prefix.*(?:[^\d.]|$)\Q$prev_version\E(?:[^\d.]|$)/o
+            and last;
+          print $line;
+          $line =~ /\S/
+            and $found_news = 1;
+        }
+    }
+  close NEWS;
+
+  $in_items
+    or die "$ME: $news_file: no matching lines for '$curr_version'\n";
+  $found_news
+    or die "$ME: $news_file: no news item found for '$curr_version'\n";
+}
+
+sub print_changelog_deltas ($$)
+{
+  my ($package_name, $prev_version) = @_;
+
+  # Print new ChangeLog entries.
+
+  # First find all CVS-controlled ChangeLog files.
+  use File::Find;
+  my @changelog;
+  find ({wanted => sub {$_ eq 'ChangeLog' && -d 'CVS'
+                          and push @changelog, $File::Find::name}},
+        '.');
+
+  # If there are no ChangeLog files, we're done.
+  @changelog
+    or return;
+  my %changelog = map {$_ => 1} @changelog;
+
+  # Reorder the list of files so that if there are ChangeLog
+  # files in the specified directories, they're listed first,
+  # in this order:
+  my @dir = qw ( . src lib m4 config doc );
+
+  # A typical @changelog array might look like this:
+  # ./ChangeLog
+  # ./po/ChangeLog
+  # ./m4/ChangeLog
+  # ./lib/ChangeLog
+  # ./doc/ChangeLog
+  # ./config/ChangeLog
+  my @reordered;
+  foreach my $d (@dir)
+    {
+      my $dot_slash = $d eq '.' ? $d : "./$d";
+      my $target = "$dot_slash/ChangeLog";
+      delete $changelog{$target}
+        and push @reordered, $target;
+    }
+
+  # Append any remaining ChangeLog files.
+  push @reordered, sort keys %changelog;
+
+  # Remove leading './'.
+  @reordered = map { s!^\./!!; $_ } @reordered;
+
+  print "\nChangeLog entries:\n\n";
+  # print join ("\n", @reordered), "\n";
+
+  $prev_version =~ s/\./_/g;
+  my $prev_cvs_tag = "\U$package_name\E-$prev_version";
+
+  my $cmd = "cvs -n diff -u -r$prev_cvs_tag -rHEAD @reordered";
+  open DIFF, '-|', $cmd
+    or die "$ME: cannot run '$cmd': $!\n";
+  # Print two types of lines, making minor changes:
+  # Lines starting with '+++ ', e.g.,
+  # +++ ChangeLog   22 Feb 2003 16:52:51 -0000      1.247
+  # and those starting with '+'.
+  # Don't print the others.
+  my $prev_printed_line_empty = 1;
+  while (defined (my $line = <DIFF>))
+    {
+      if ($line =~ /^\+\+\+ /)
+        {
+          my $separator = "*"x70 ."\n";
+          $line =~ s///;
+          $line =~ s/\s.*//;
+          $prev_printed_line_empty
+            or print "\n";
+          print $separator, $line, $separator;
+        }
+      elsif ($line =~ /^\+/)
+        {
+          $line =~ s///;
+          print $line;
+          $prev_printed_line_empty = ($line =~ /^$/);
+        }
+    }
+  close DIFF;
+
+  # The exit code should be 1.
+  # Allow in case there are no modified ChangeLog entries.
+  $? == 256 || $? == 128
+    or warn "warning: '$cmd' had unexpected exit code or signal ($?)\n";
+}
+
+sub get_tool_versions ($$)
+{
+  my ($tool_list, $gnulib_version) = @_;
+  @$tool_list
+    or return ();
+
+  my $fail;
+  my @tool_version_pair;
+  foreach my $t (@$tool_list)
+    {
+      if ($t eq 'gnulib')
+        {
+          push @tool_version_pair, ucfirst $t . ' ' . $gnulib_version;
+          next;
+        }
+      # Assume that the last "word" on the first line of
+      # 'tool --version' output is the version string.
+      my ($first_line, undef) = split ("\n", `$t --version`);
+      if ($first_line =~ /.* (\d[\w.-]+)$/)
+        {
+          $t = ucfirst $t;
+          push @tool_version_pair, "$t $1";
+        }
+      else
+        {
+          defined $first_line
+            and $first_line = '';
+          warn "$t: unexpected --version output\n:$first_line";
+          $fail = 1;
+        }
+    }
+
+  $fail
+    and exit 1;
+
+  return @tool_version_pair;
+}
+
+{
+  # Use the C locale so that, for instance, "du" does not
+  # print "1,2" instead of "1.2", which would confuse our regexps.
+  $ENV{LC_ALL} = "C";
+
+  my $mail_headers;
+  my $release_type;
+  my $package_name;
+  my $prev_version;
+  my $curr_version;
+  my $gpg_key_id;
+  my @url_dir_list;
+  my @news_file;
+  my $bootstrap_tools;
+  my $gnulib_version;
+  my $print_checksums_p = 1;
+
+  # Reformat the warnings before displaying them.
+  local $SIG{__WARN__} = sub
+    {
+      my ($msg) = @_;
+      # Warnings from GetOptions.
+      $msg =~ s/Option (\w)/option --$1/;
+      warn "$ME: $msg";
+    };
+
+  GetOptions
+    (
+     'mail-headers=s'     => \$mail_headers,
+     'release-type=s'     => \$release_type,
+     'package-name=s'     => \$package_name,
+     'previous-version=s' => \$prev_version,
+     'current-version=s'  => \$curr_version,
+     'gpg-key-id=s'       => \$gpg_key_id,
+     'url-directory=s'    => \@url_dir_list,
+     'news=s'             => \@news_file,
+     'srcdir=s'           => \$srcdir,
+     'bootstrap-tools=s'  => \$bootstrap_tools,
+     'gnulib-version=s'   => \$gnulib_version,
+     'print-checksums!'   => \$print_checksums_p,
+     'archive-suffix=s'   => \@archive_suffixes,
+
+     help => sub { usage 0 },
+     version =>
+       sub
+       {
+         print "$ME version $VERSION\n";
+         print "Copyright (C) $copyright_year Free Software Foundation, Inc.\n";
+         print "License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.\n"
+             . "This is free software: you are free to change and redistribute it.\n"
+             . "There is NO WARRANTY, to the extent permitted by law.\n";
+         print "\n";
+         my $author = "Jim Meyering";
+         print "Written by $author.\n";
+         exit
+       },
+    ) or usage 1;
+
+  my $fail = 0;
+  # Ensure that each required option is specified.
+  $release_type
+    or (warn "release type not specified\n"), $fail = 1;
+  $package_name
+    or (warn "package name not specified\n"), $fail = 1;
+  $prev_version
+    or (warn "previous version string not specified\n"), $fail = 1;
+  $curr_version
+    or (warn "current version string not specified\n"), $fail = 1;
+  $gpg_key_id
+    or (warn "GnuPG key ID not specified\n"), $fail = 1;
+  @url_dir_list
+    or (warn "URL directory name(s) not specified\n"), $fail = 1;
+
+  my @tool_list = split ',', $bootstrap_tools
+    if $bootstrap_tools;
+
+  grep (/^gnulib$/, @tool_list) ^ defined $gnulib_version
+    and (warn "when specifying gnulib as a tool, you must also specify\n"
+        . "--gnulib-version=V, where V is the result of running git describe\n"
+        . "in the gnulib source directory.\n"), $fail = 1;
+
+  !$release_type || exists $valid_release_types{$release_type}
+    or (warn "'$release_type': invalid release type\n"), $fail = 1;
+
+  @ARGV
+    and (warn "too many arguments:\n", join ("\n", @ARGV), "\n"),
+      $fail = 1;
+  $fail
+    and usage 1;
+
+  my $my_distdir = "$package_name-$curr_version";
+
+  my $xd = "$package_name-$prev_version-$curr_version.xdelta";
+
+  my @candidates = map { "$my_distdir.$_" } @archive_suffixes;
+  my @tarballs = grep {-f $_} @candidates;
+
+  @tarballs
+    or die "$ME: none of " . join(', ', @candidates) . " were found\n";
+  my @sizable = @tarballs;
+  -f $xd
+    and push @sizable, $xd;
+  my %size = sizes (@sizable);
+  %size
+    or exit 1;
+
+  my $headers = '';
+  if (defined $mail_headers)
+    {
+      ($headers = $mail_headers) =~ s/\s+(\S+:)/\n$1/g;
+      $headers .= "\n";
+    }
+
+  # The markup is escaped as <\# so that when this script is sent by
+  # mail (or part of a diff), Gnus is not triggered.
+  print <<EOF;
+
+${headers}Subject: $my_distdir released [$release_type]
+
+<\#secure method=pgpmime mode=sign>
+
+FIXME: put comments here
+
+EOF
+
+  if (@url_dir_list == 1 && @tarballs == 1)
+    {
+      # When there's only one tarball and one URL, use a more concise form.
+      my $m = "$url_dir_list[0]/$tarballs[0]";
+      print "Here are the compressed sources and a GPG detached signature[*]:\n"
+        . "  $m\n"
+        . "  $m.sig\n\n";
+    }
+  else
+    {
+      print_locations ("compressed sources", @url_dir_list, %size, @tarballs);
+      -f $xd
+        and print_locations ("xdelta diffs (useful? if so, "
+                             . "please tell bug-gnulib\@gnu.org)",
+                             @url_dir_list, %size, $xd);
+      my @sig_files = map { "$_.sig" } @tarballs;
+      print_locations ("GPG detached signatures[*]", @url_dir_list, %size,
+                       @sig_files);
+    }
+
+  if ($url_dir_list[0] =~ "gnu\.org")
+    {
+      print "Use a mirror for higher download bandwidth:\n";
+      if (@tarballs == 1 && $url_dir_list[0] =~ m!https://ftp\.gnu\.org/gnu/!)
+        {
+          (my $m = "$url_dir_list[0]/$tarballs[0]")
+            =~ s!https://ftp\.gnu\.org/gnu/!https://ftpmirror\.gnu\.org/!;
+          print "  $m\n"
+              . "  $m.sig\n\n";
+
+        }
+      else
+        {
+          print "  https://www.gnu.org/order/ftp.html\n\n";
+        }
+    }
+
+  $print_checksums_p
+    and print_checksums (@sizable);
+
+  print <<EOF;
+[*] Use a .sig file to verify that the corresponding file (without the
+.sig suffix) is intact.  First, be sure to download both the .sig file
+and the corresponding tarball.  Then, run a command like this:
+
+  gpg --verify $tarballs[0].sig
+
+If that command fails because you don't have the required public key,
+then run this command to import it:
+
+  gpg --keyserver keys.gnupg.net --recv-keys $gpg_key_id
+
+and rerun the 'gpg --verify' command.
+EOF
+
+  my @tool_versions = get_tool_versions (\@tool_list, $gnulib_version);
+  @tool_versions
+    and print "\nThis release was bootstrapped with the following tools:",
+      join ('', map {"\n  $_"} @tool_versions), "\n";
+
+  print_news_deltas ($_, $prev_version, $curr_version)
+    foreach @news_file;
+
+  $release_type eq 'stable'
+    or print_changelog_deltas ($package_name, $prev_version);
+
+  exit 0;
+}
+
+### Setup "GNU" style for perl-mode and cperl-mode.
+## Local Variables:
+## mode: perl
+## perl-indent-level: 2
+## perl-continued-statement-offset: 2
+## perl-continued-brace-offset: 0
+## perl-brace-offset: 0
+## perl-brace-imaginary-offset: 0
+## perl-label-offset: -2
+## perl-extra-newline-before-brace: t
+## perl-merge-trailing-else: nil
+## eval: (add-hook 'before-save-hook 'time-stamp)
+## time-stamp-line-limit: 50
+## time-stamp-start: "my $VERSION = '"
+## time-stamp-format: "%:y-%02m-%02d %02H:%02M"
+## time-stamp-time-zone: "UTC0"
+## time-stamp-end: "'; # UTC"
+## End:
diff --git a/src/grep/build-aux/ar-lib b/src/grep/build-aux/ar-lib
new file mode 100755
index 0000000..1700c5e
--- /dev/null
+++ b/src/grep/build-aux/ar-lib
@@ -0,0 +1,270 @@
+#! /bin/sh
+# Wrapper for Microsoft lib.exe
+
+me=ar-lib
+scriptversion=2012-03-01.08; # UTC
+
+# Copyright (C) 2010-2015 Free Software Foundation, Inc.
+# Written by Peter Rosin <peda@lysator.liu.se>.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# This file is maintained in Automake, please report
+# bugs to <bug-automake@gnu.org> or send patches to
+# <automake-patches@gnu.org>.
+
+
+# func_error message
+func_error ()
+{
+  echo "$me: $1" 1>&2
+  exit 1
+}
+
+file_conv=
+
+# func_file_conv build_file
+# Convert a $build file to $host form and store it in $file
+# Currently only supports Windows hosts.
+func_file_conv ()
+{
+  file=$1
+  case $file in
+    / | /[!/]*) # absolute file, and not a UNC file
+      if test -z "$file_conv"; then
+	# lazily determine how to convert abs files
+	case `uname -s` in
+	  MINGW*)
+	    file_conv=mingw
+	    ;;
+	  CYGWIN*)
+	    file_conv=cygwin
+	    ;;
+	  *)
+	    file_conv=wine
+	    ;;
+	esac
+      fi
+      case $file_conv in
+	mingw)
+	  file=`cmd //C echo "$file " | sed -e 's/"\(.*\) " *$/\1/'`
+	  ;;
+	cygwin)
+	  file=`cygpath -m "$file" || echo "$file"`
+	  ;;
+	wine)
+	  file=`winepath -w "$file" || echo "$file"`
+	  ;;
+      esac
+      ;;
+  esac
+}
+
+# func_at_file at_file operation archive
+# Iterate over all members in AT_FILE performing OPERATION on ARCHIVE
+# for each of them.
+# When interpreting the content of the @FILE, do NOT use func_file_conv,
+# since the user would need to supply preconverted file names to
+# binutils ar, at least for MinGW.
+func_at_file ()
+{
+  operation=$2
+  archive=$3
+  at_file_contents=`cat "$1"`
+  eval set x "$at_file_contents"
+  shift
+
+  for member
+  do
+    $AR -NOLOGO $operation:"$member" "$archive" || exit $?
+  done
+}
+
+case $1 in
+  '')
+     func_error "no command.  Try '$0 --help' for more information."
+     ;;
+  -h | --h*)
+    cat <<EOF
+Usage: $me [--help] [--version] PROGRAM ACTION ARCHIVE [MEMBER...]
+
+Members may be specified in a file named with @FILE.
+EOF
+    exit $?
+    ;;
+  -v | --v*)
+    echo "$me, version $scriptversion"
+    exit $?
+    ;;
+esac
+
+if test $# -lt 3; then
+  func_error "you must specify a program, an action and an archive"
+fi
+
+AR=$1
+shift
+while :
+do
+  if test $# -lt 2; then
+    func_error "you must specify a program, an action and an archive"
+  fi
+  case $1 in
+    -lib | -LIB \
+    | -ltcg | -LTCG \
+    | -machine* | -MACHINE* \
+    | -subsystem* | -SUBSYSTEM* \
+    | -verbose | -VERBOSE \
+    | -wx* | -WX* )
+      AR="$AR $1"
+      shift
+      ;;
+    *)
+      action=$1
+      shift
+      break
+      ;;
+  esac
+done
+orig_archive=$1
+shift
+func_file_conv "$orig_archive"
+archive=$file
+
+# strip leading dash in $action
+action=${action#-}
+
+delete=
+extract=
+list=
+quick=
+replace=
+index=
+create=
+
+while test -n "$action"
+do
+  case $action in
+    d*) delete=yes  ;;
+    x*) extract=yes ;;
+    t*) list=yes    ;;
+    q*) quick=yes   ;;
+    r*) replace=yes ;;
+    s*) index=yes   ;;
+    S*)             ;; # the index is always updated implicitly
+    c*) create=yes  ;;
+    u*)             ;; # TODO: don't ignore the update modifier
+    v*)             ;; # TODO: don't ignore the verbose modifier
+    *)
+      func_error "unknown action specified"
+      ;;
+  esac
+  action=${action#?}
+done
+
+case $delete$extract$list$quick$replace,$index in
+  yes,* | ,yes)
+    ;;
+  yesyes*)
+    func_error "more than one action specified"
+    ;;
+  *)
+    func_error "no action specified"
+    ;;
+esac
+
+if test -n "$delete"; then
+  if test ! -f "$orig_archive"; then
+    func_error "archive not found"
+  fi
+  for member
+  do
+    case $1 in
+      @*)
+        func_at_file "${1#@}" -REMOVE "$archive"
+        ;;
+      *)
+        func_file_conv "$1"
+        $AR -NOLOGO -REMOVE:"$file" "$archive" || exit $?
+        ;;
+    esac
+  done
+
+elif test -n "$extract"; then
+  if test ! -f "$orig_archive"; then
+    func_error "archive not found"
+  fi
+  if test $# -gt 0; then
+    for member
+    do
+      case $1 in
+        @*)
+          func_at_file "${1#@}" -EXTRACT "$archive"
+          ;;
+        *)
+          func_file_conv "$1"
+          $AR -NOLOGO -EXTRACT:"$file" "$archive" || exit $?
+          ;;
+      esac
+    done
+  else
+    $AR -NOLOGO -LIST "$archive" | sed -e 's/\\/\\\\/g' | while read member
+    do
+      $AR -NOLOGO -EXTRACT:"$member" "$archive" || exit $?
+    done
+  fi
+
+elif test -n "$quick$replace"; then
+  if test ! -f "$orig_archive"; then
+    if test -z "$create"; then
+      echo "$me: creating $orig_archive"
+    fi
+    orig_archive=
+  else
+    orig_archive=$archive
+  fi
+
+  for member
+  do
+    case $1 in
+    @*)
+      func_file_conv "${1#@}"
+      set x "$@" "@$file"
+      ;;
+    *)
+      func_file_conv "$1"
+      set x "$@" "$file"
+      ;;
+    esac
+    shift
+    shift
+  done
+
+  if test -n "$orig_archive"; then
+    $AR -NOLOGO -OUT:"$archive" "$orig_archive" "$@" || exit $?
+  else
+    $AR -NOLOGO -OUT:"$archive" "$@" || exit $?
+  fi
+
+elif test -n "$list"; then
+  if test ! -f "$orig_archive"; then
+    func_error "archive not found"
+  fi
+  $AR -NOLOGO -LIST "$archive" || exit $?
+fi
diff --git a/src/grep/build-aux/compile b/src/grep/build-aux/compile
new file mode 100755
index 0000000..df363c8
--- /dev/null
+++ b/src/grep/build-aux/compile
@@ -0,0 +1,348 @@
+#! /bin/sh
+# Wrapper for compilers which do not understand '-c -o'.
+
+scriptversion=2018-03-07.03; # UTC
+
+# Copyright (C) 1999-2021 Free Software Foundation, Inc.
+# Written by Tom Tromey <tromey@cygnus.com>.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# This file is maintained in Automake, please report
+# bugs to <bug-automake@gnu.org> or send patches to
+# <automake-patches@gnu.org>.
+
+nl='
+'
+
+# We need space, tab and new line, in precisely that order.  Quoting is
+# there to prevent tools from complaining about whitespace usage.
+IFS=" ""	$nl"
+
+file_conv=
+
+# func_file_conv build_file lazy
+# Convert a $build file to $host form and store it in $file
+# Currently only supports Windows hosts. If the determined conversion
+# type is listed in (the comma separated) LAZY, no conversion will
+# take place.
+func_file_conv ()
+{
+  file=$1
+  case $file in
+    / | /[!/]*) # absolute file, and not a UNC file
+      if test -z "$file_conv"; then
+	# lazily determine how to convert abs files
+	case `uname -s` in
+	  MINGW*)
+	    file_conv=mingw
+	    ;;
+	  CYGWIN* | MSYS*)
+	    file_conv=cygwin
+	    ;;
+	  *)
+	    file_conv=wine
+	    ;;
+	esac
+      fi
+      case $file_conv/,$2, in
+	*,$file_conv,*)
+	  ;;
+	mingw/*)
+	  file=`cmd //C echo "$file " | sed -e 's/"\(.*\) " *$/\1/'`
+	  ;;
+	cygwin/* | msys/*)
+	  file=`cygpath -m "$file" || echo "$file"`
+	  ;;
+	wine/*)
+	  file=`winepath -w "$file" || echo "$file"`
+	  ;;
+      esac
+      ;;
+  esac
+}
+
+# func_cl_dashL linkdir
+# Make cl look for libraries in LINKDIR
+func_cl_dashL ()
+{
+  func_file_conv "$1"
+  if test -z "$lib_path"; then
+    lib_path=$file
+  else
+    lib_path="$lib_path;$file"
+  fi
+  linker_opts="$linker_opts -LIBPATH:$file"
+}
+
+# func_cl_dashl library
+# Do a library search-path lookup for cl
+func_cl_dashl ()
+{
+  lib=$1
+  found=no
+  save_IFS=$IFS
+  IFS=';'
+  for dir in $lib_path $LIB
+  do
+    IFS=$save_IFS
+    if $shared && test -f "$dir/$lib.dll.lib"; then
+      found=yes
+      lib=$dir/$lib.dll.lib
+      break
+    fi
+    if test -f "$dir/$lib.lib"; then
+      found=yes
+      lib=$dir/$lib.lib
+      break
+    fi
+    if test -f "$dir/lib$lib.a"; then
+      found=yes
+      lib=$dir/lib$lib.a
+      break
+    fi
+  done
+  IFS=$save_IFS
+
+  if test "$found" != yes; then
+    lib=$lib.lib
+  fi
+}
+
+# func_cl_wrapper cl arg...
+# Adjust compile command to suit cl
+func_cl_wrapper ()
+{
+  # Assume a capable shell
+  lib_path=
+  shared=:
+  linker_opts=
+  for arg
+  do
+    if test -n "$eat"; then
+      eat=
+    else
+      case $1 in
+	-o)
+	  # configure might choose to run compile as 'compile cc -o foo foo.c'.
+	  eat=1
+	  case $2 in
+	    *.o | *.[oO][bB][jJ])
+	      func_file_conv "$2"
+	      set x "$@" -Fo"$file"
+	      shift
+	      ;;
+	    *)
+	      func_file_conv "$2"
+	      set x "$@" -Fe"$file"
+	      shift
+	      ;;
+	  esac
+	  ;;
+	-I)
+	  eat=1
+	  func_file_conv "$2" mingw
+	  set x "$@" -I"$file"
+	  shift
+	  ;;
+	-I*)
+	  func_file_conv "${1#-I}" mingw
+	  set x "$@" -I"$file"
+	  shift
+	  ;;
+	-l)
+	  eat=1
+	  func_cl_dashl "$2"
+	  set x "$@" "$lib"
+	  shift
+	  ;;
+	-l*)
+	  func_cl_dashl "${1#-l}"
+	  set x "$@" "$lib"
+	  shift
+	  ;;
+	-L)
+	  eat=1
+	  func_cl_dashL "$2"
+	  ;;
+	-L*)
+	  func_cl_dashL "${1#-L}"
+	  ;;
+	-static)
+	  shared=false
+	  ;;
+	-Wl,*)
+	  arg=${1#-Wl,}
+	  save_ifs="$IFS"; IFS=','
+	  for flag in $arg; do
+	    IFS="$save_ifs"
+	    linker_opts="$linker_opts $flag"
+	  done
+	  IFS="$save_ifs"
+	  ;;
+	-Xlinker)
+	  eat=1
+	  linker_opts="$linker_opts $2"
+	  ;;
+	-*)
+	  set x "$@" "$1"
+	  shift
+	  ;;
+	*.cc | *.CC | *.cxx | *.CXX | *.[cC]++)
+	  func_file_conv "$1"
+	  set x "$@" -Tp"$file"
+	  shift
+	  ;;
+	*.c | *.cpp | *.CPP | *.lib | *.LIB | *.Lib | *.OBJ | *.obj | *.[oO])
+	  func_file_conv "$1" mingw
+	  set x "$@" "$file"
+	  shift
+	  ;;
+	*)
+	  set x "$@" "$1"
+	  shift
+	  ;;
+      esac
+    fi
+    shift
+  done
+  if test -n "$linker_opts"; then
+    linker_opts="-link$linker_opts"
+  fi
+  exec "$@" $linker_opts
+  exit 1
+}
+
+eat=
+
+case $1 in
+  '')
+     echo "$0: No command.  Try '$0 --help' for more information." 1>&2
+     exit 1;
+     ;;
+  -h | --h*)
+    cat <<\EOF
+Usage: compile [--help] [--version] PROGRAM [ARGS]
+
+Wrapper for compilers which do not understand '-c -o'.
+Remove '-o dest.o' from ARGS, run PROGRAM with the remaining
+arguments, and rename the output as expected.
+
+If you are trying to build a whole package this is not the
+right script to run: please start by reading the file 'INSTALL'.
+
+Report bugs to <bug-automake@gnu.org>.
+EOF
+    exit $?
+    ;;
+  -v | --v*)
+    echo "compile $scriptversion"
+    exit $?
+    ;;
+  cl | *[/\\]cl | cl.exe | *[/\\]cl.exe | \
+  icl | *[/\\]icl | icl.exe | *[/\\]icl.exe )
+    func_cl_wrapper "$@"      # Doesn't return...
+    ;;
+esac
+
+ofile=
+cfile=
+
+for arg
+do
+  if test -n "$eat"; then
+    eat=
+  else
+    case $1 in
+      -o)
+	# configure might choose to run compile as 'compile cc -o foo foo.c'.
+	# So we strip '-o arg' only if arg is an object.
+	eat=1
+	case $2 in
+	  *.o | *.obj)
+	    ofile=$2
+	    ;;
+	  *)
+	    set x "$@" -o "$2"
+	    shift
+	    ;;
+	esac
+	;;
+      *.c)
+	cfile=$1
+	set x "$@" "$1"
+	shift
+	;;
+      *)
+	set x "$@" "$1"
+	shift
+	;;
+    esac
+  fi
+  shift
+done
+
+if test -z "$ofile" || test -z "$cfile"; then
+  # If no '-o' option was seen then we might have been invoked from a
+  # pattern rule where we don't need one.  That is ok -- this is a
+  # normal compilation that the losing compiler can handle.  If no
+  # '.c' file was seen then we are probably linking.  That is also
+  # ok.
+  exec "$@"
+fi
+
+# Name of file we expect compiler to create.
+cofile=`echo "$cfile" | sed 's|^.*[\\/]||; s|^[a-zA-Z]:||; s/\.c$/.o/'`
+
+# Create the lock directory.
+# Note: use '[/\\:.-]' here to ensure that we don't use the same name
+# that we are using for the .o file.  Also, base the name on the expected
+# object file name, since that is what matters with a parallel build.
+lockdir=`echo "$cofile" | sed -e 's|[/\\:.-]|_|g'`.d
+while true; do
+  if mkdir "$lockdir" >/dev/null 2>&1; then
+    break
+  fi
+  sleep 1
+done
+# FIXME: race condition here if user kills between mkdir and trap.
+trap "rmdir '$lockdir'; exit 1" 1 2 15
+
+# Run the compile.
+"$@"
+ret=$?
+
+if test -f "$cofile"; then
+  test "$cofile" = "$ofile" || mv "$cofile" "$ofile"
+elif test -f "${cofile}bj"; then
+  test "${cofile}bj" = "$ofile" || mv "${cofile}bj" "$ofile"
+fi
+
+rmdir "$lockdir"
+exit $ret
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/src/grep/build-aux/config.guess b/src/grep/build-aux/config.guess
new file mode 100755
index 0000000..e81d3ae
--- /dev/null
+++ b/src/grep/build-aux/config.guess
@@ -0,0 +1,1748 @@
+#! /bin/sh
+# Attempt to guess a canonical system name.
+#   Copyright 1992-2021 Free Software Foundation, Inc.
+
+# shellcheck disable=SC2006,SC2268 # see below for rationale
+
+timestamp='2021-06-03'
+
+# This file is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, see <https://www.gnu.org/licenses/>.
+#
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that
+# program.  This Exception is an additional permission under section 7
+# of the GNU General Public License, version 3 ("GPLv3").
+#
+# Originally written by Per Bothner; maintained since 2000 by Ben Elliston.
+#
+# You can get the latest version of this script from:
+# https://git.savannah.gnu.org/cgit/config.git/plain/config.guess
+#
+# Please send patches to <config-patches@gnu.org>.
+
+
+# The "shellcheck disable" line above the timestamp inhibits complaints
+# about features and limitations of the classic Bourne shell that were
+# superseded or lifted in POSIX.  However, this script identifies a wide
+# variety of pre-POSIX systems that do not have POSIX shells at all, and
+# even some reasonably current systems (Solaris 10 as case-in-point) still
+# have a pre-POSIX /bin/sh.
+
+
+me=`echo "$0" | sed -e 's,.*/,,'`
+
+usage="\
+Usage: $0 [OPTION]
+
+Output the configuration name of the system \`$me' is run on.
+
+Options:
+  -h, --help         print this help, then exit
+  -t, --time-stamp   print date of last modification, then exit
+  -v, --version      print version number, then exit
+
+Report bugs and patches to <config-patches@gnu.org>."
+
+version="\
+GNU config.guess ($timestamp)
+
+Originally written by Per Bothner.
+Copyright 1992-2021 Free Software Foundation, Inc.
+
+This is free software; see the source for copying conditions.  There is NO
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
+
+help="
+Try \`$me --help' for more information."
+
+# Parse command line
+while test $# -gt 0 ; do
+  case $1 in
+    --time-stamp | --time* | -t )
+       echo "$timestamp" ; exit ;;
+    --version | -v )
+       echo "$version" ; exit ;;
+    --help | --h* | -h )
+       echo "$usage"; exit ;;
+    -- )     # Stop option processing
+       shift; break ;;
+    - )	# Use stdin as input.
+       break ;;
+    -* )
+       echo "$me: invalid option $1$help" >&2
+       exit 1 ;;
+    * )
+       break ;;
+  esac
+done
+
+if test $# != 0; then
+  echo "$me: too many arguments$help" >&2
+  exit 1
+fi
+
+# Just in case it came from the environment.
+GUESS=
+
+# CC_FOR_BUILD -- compiler used by this script. Note that the use of a
+# compiler to aid in system detection is discouraged as it requires
+# temporary files to be created and, as you can see below, it is a
+# headache to deal with in a portable fashion.
+
+# Historically, `CC_FOR_BUILD' used to be named `HOST_CC'. We still
+# use `HOST_CC' if defined, but it is deprecated.
+
+# Portable tmp directory creation inspired by the Autoconf team.
+
+tmp=
+# shellcheck disable=SC2172
+trap 'test -z "$tmp" || rm -fr "$tmp"' 0 1 2 13 15
+
+set_cc_for_build() {
+    # prevent multiple calls if $tmp is already set
+    test "$tmp" && return 0
+    : "${TMPDIR=/tmp}"
+    # shellcheck disable=SC2039,SC3028
+    { tmp=`(umask 077 && mktemp -d "$TMPDIR/cgXXXXXX") 2>/dev/null` && test -n "$tmp" && test -d "$tmp" ; } ||
+	{ test -n "$RANDOM" && tmp=$TMPDIR/cg$$-$RANDOM && (umask 077 && mkdir "$tmp" 2>/dev/null) ; } ||
+	{ tmp=$TMPDIR/cg-$$ && (umask 077 && mkdir "$tmp" 2>/dev/null) && echo "Warning: creating insecure temp directory" >&2 ; } ||
+	{ echo "$me: cannot create a temporary directory in $TMPDIR" >&2 ; exit 1 ; }
+    dummy=$tmp/dummy
+    case ${CC_FOR_BUILD-},${HOST_CC-},${CC-} in
+	,,)    echo "int x;" > "$dummy.c"
+	       for driver in cc gcc c89 c99 ; do
+		   if ($driver -c -o "$dummy.o" "$dummy.c") >/dev/null 2>&1 ; then
+		       CC_FOR_BUILD=$driver
+		       break
+		   fi
+	       done
+	       if test x"$CC_FOR_BUILD" = x ; then
+		   CC_FOR_BUILD=no_compiler_found
+	       fi
+	       ;;
+	,,*)   CC_FOR_BUILD=$CC ;;
+	,*,*)  CC_FOR_BUILD=$HOST_CC ;;
+    esac
+}
+
+# This is needed to find uname on a Pyramid OSx when run in the BSD universe.
+# (ghazi@noc.rutgers.edu 1994-08-24)
+if test -f /.attbin/uname ; then
+	PATH=$PATH:/.attbin ; export PATH
+fi
+
+UNAME_MACHINE=`(uname -m) 2>/dev/null` || UNAME_MACHINE=unknown
+UNAME_RELEASE=`(uname -r) 2>/dev/null` || UNAME_RELEASE=unknown
+UNAME_SYSTEM=`(uname -s) 2>/dev/null` || UNAME_SYSTEM=unknown
+UNAME_VERSION=`(uname -v) 2>/dev/null` || UNAME_VERSION=unknown
+
+case $UNAME_SYSTEM in
+Linux|GNU|GNU/*)
+	LIBC=unknown
+
+	set_cc_for_build
+	cat <<-EOF > "$dummy.c"
+	#include <features.h>
+	#if defined(__UCLIBC__)
+	LIBC=uclibc
+	#elif defined(__dietlibc__)
+	LIBC=dietlibc
+	#elif defined(__GLIBC__)
+	LIBC=gnu
+	#else
+	#include <stdarg.h>
+	/* First heuristic to detect musl libc.  */
+	#ifdef __DEFINED_va_list
+	LIBC=musl
+	#endif
+	#endif
+	EOF
+	cc_set_libc=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^LIBC' | sed 's, ,,g'`
+	eval "$cc_set_libc"
+
+	# Second heuristic to detect musl libc.
+	if [ "$LIBC" = unknown ] &&
+	   command -v ldd >/dev/null &&
+	   ldd --version 2>&1 | grep -q ^musl; then
+		LIBC=musl
+	fi
+
+	# If the system lacks a compiler, then just pick glibc.
+	# We could probably try harder.
+	if [ "$LIBC" = unknown ]; then
+		LIBC=gnu
+	fi
+	;;
+esac
+
+# Note: order is significant - the case branches are not exclusive.
+
+case $UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION in
+    *:NetBSD:*:*)
+	# NetBSD (nbsd) targets should (where applicable) match one or
+	# more of the tuples: *-*-netbsdelf*, *-*-netbsdaout*,
+	# *-*-netbsdecoff* and *-*-netbsd*.  For targets that recently
+	# switched to ELF, *-*-netbsd* would select the old
+	# object file format.  This provides both forward
+	# compatibility and a consistent mechanism for selecting the
+	# object file format.
+	#
+	# Note: NetBSD doesn't particularly care about the vendor
+	# portion of the name.  We always set it to "unknown".
+	UNAME_MACHINE_ARCH=`(uname -p 2>/dev/null || \
+	    /sbin/sysctl -n hw.machine_arch 2>/dev/null || \
+	    /usr/sbin/sysctl -n hw.machine_arch 2>/dev/null || \
+	    echo unknown)`
+	case $UNAME_MACHINE_ARCH in
+	    aarch64eb) machine=aarch64_be-unknown ;;
+	    armeb) machine=armeb-unknown ;;
+	    arm*) machine=arm-unknown ;;
+	    sh3el) machine=shl-unknown ;;
+	    sh3eb) machine=sh-unknown ;;
+	    sh5el) machine=sh5le-unknown ;;
+	    earmv*)
+		arch=`echo "$UNAME_MACHINE_ARCH" | sed -e 's,^e\(armv[0-9]\).*$,\1,'`
+		endian=`echo "$UNAME_MACHINE_ARCH" | sed -ne 's,^.*\(eb\)$,\1,p'`
+		machine=${arch}${endian}-unknown
+		;;
+	    *) machine=$UNAME_MACHINE_ARCH-unknown ;;
+	esac
+	# The Operating System including object format, if it has switched
+	# to ELF recently (or will in the future) and ABI.
+	case $UNAME_MACHINE_ARCH in
+	    earm*)
+		os=netbsdelf
+		;;
+	    arm*|i386|m68k|ns32k|sh3*|sparc|vax)
+		set_cc_for_build
+		if echo __ELF__ | $CC_FOR_BUILD -E - 2>/dev/null \
+			| grep -q __ELF__
+		then
+		    # Once all utilities can be ECOFF (netbsdecoff) or a.out (netbsdaout).
+		    # Return netbsd for either.  FIX?
+		    os=netbsd
+		else
+		    os=netbsdelf
+		fi
+		;;
+	    *)
+		os=netbsd
+		;;
+	esac
+	# Determine ABI tags.
+	case $UNAME_MACHINE_ARCH in
+	    earm*)
+		expr='s/^earmv[0-9]/-eabi/;s/eb$//'
+		abi=`echo "$UNAME_MACHINE_ARCH" | sed -e "$expr"`
+		;;
+	esac
+	# The OS release
+	# Debian GNU/NetBSD machines have a different userland, and
+	# thus, need a distinct triplet. However, they do not need
+	# kernel version information, so it can be replaced with a
+	# suitable tag, in the style of linux-gnu.
+	case $UNAME_VERSION in
+	    Debian*)
+		release='-gnu'
+		;;
+	    *)
+		release=`echo "$UNAME_RELEASE" | sed -e 's/[-_].*//' | cut -d. -f1,2`
+		;;
+	esac
+	# Since CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM:
+	# contains redundant information, the shorter form:
+	# CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM is used.
+	GUESS=$machine-${os}${release}${abi-}
+	;;
+    *:Bitrig:*:*)
+	UNAME_MACHINE_ARCH=`arch | sed 's/Bitrig.//'`
+	GUESS=$UNAME_MACHINE_ARCH-unknown-bitrig$UNAME_RELEASE
+	;;
+    *:OpenBSD:*:*)
+	UNAME_MACHINE_ARCH=`arch | sed 's/OpenBSD.//'`
+	GUESS=$UNAME_MACHINE_ARCH-unknown-openbsd$UNAME_RELEASE
+	;;
+    *:SecBSD:*:*)
+	UNAME_MACHINE_ARCH=`arch | sed 's/SecBSD.//'`
+	GUESS=$UNAME_MACHINE_ARCH-unknown-secbsd$UNAME_RELEASE
+	;;
+    *:LibertyBSD:*:*)
+	UNAME_MACHINE_ARCH=`arch | sed 's/^.*BSD\.//'`
+	GUESS=$UNAME_MACHINE_ARCH-unknown-libertybsd$UNAME_RELEASE
+	;;
+    *:MidnightBSD:*:*)
+	GUESS=$UNAME_MACHINE-unknown-midnightbsd$UNAME_RELEASE
+	;;
+    *:ekkoBSD:*:*)
+	GUESS=$UNAME_MACHINE-unknown-ekkobsd$UNAME_RELEASE
+	;;
+    *:SolidBSD:*:*)
+	GUESS=$UNAME_MACHINE-unknown-solidbsd$UNAME_RELEASE
+	;;
+    *:OS108:*:*)
+	GUESS=$UNAME_MACHINE-unknown-os108_$UNAME_RELEASE
+	;;
+    macppc:MirBSD:*:*)
+	GUESS=powerpc-unknown-mirbsd$UNAME_RELEASE
+	;;
+    *:MirBSD:*:*)
+	GUESS=$UNAME_MACHINE-unknown-mirbsd$UNAME_RELEASE
+	;;
+    *:Sortix:*:*)
+	GUESS=$UNAME_MACHINE-unknown-sortix
+	;;
+    *:Twizzler:*:*)
+	GUESS=$UNAME_MACHINE-unknown-twizzler
+	;;
+    *:Redox:*:*)
+	GUESS=$UNAME_MACHINE-unknown-redox
+	;;
+    mips:OSF1:*.*)
+	GUESS=mips-dec-osf1
+	;;
+    alpha:OSF1:*:*)
+	# Reset EXIT trap before exiting to avoid spurious non-zero exit code.
+	trap '' 0
+	case $UNAME_RELEASE in
+	*4.0)
+		UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $3}'`
+		;;
+	*5.*)
+		UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $4}'`
+		;;
+	esac
+	# According to Compaq, /usr/sbin/psrinfo has been available on
+	# OSF/1 and Tru64 systems produced since 1995.  I hope that
+	# covers most systems running today.  This code pipes the CPU
+	# types through head -n 1, so we only detect the type of CPU 0.
+	ALPHA_CPU_TYPE=`/usr/sbin/psrinfo -v | sed -n -e 's/^  The alpha \(.*\) processor.*$/\1/p' | head -n 1`
+	case $ALPHA_CPU_TYPE in
+	    "EV4 (21064)")
+		UNAME_MACHINE=alpha ;;
+	    "EV4.5 (21064)")
+		UNAME_MACHINE=alpha ;;
+	    "LCA4 (21066/21068)")
+		UNAME_MACHINE=alpha ;;
+	    "EV5 (21164)")
+		UNAME_MACHINE=alphaev5 ;;
+	    "EV5.6 (21164A)")
+		UNAME_MACHINE=alphaev56 ;;
+	    "EV5.6 (21164PC)")
+		UNAME_MACHINE=alphapca56 ;;
+	    "EV5.7 (21164PC)")
+		UNAME_MACHINE=alphapca57 ;;
+	    "EV6 (21264)")
+		UNAME_MACHINE=alphaev6 ;;
+	    "EV6.7 (21264A)")
+		UNAME_MACHINE=alphaev67 ;;
+	    "EV6.8CB (21264C)")
+		UNAME_MACHINE=alphaev68 ;;
+	    "EV6.8AL (21264B)")
+		UNAME_MACHINE=alphaev68 ;;
+	    "EV6.8CX (21264D)")
+		UNAME_MACHINE=alphaev68 ;;
+	    "EV6.9A (21264/EV69A)")
+		UNAME_MACHINE=alphaev69 ;;
+	    "EV7 (21364)")
+		UNAME_MACHINE=alphaev7 ;;
+	    "EV7.9 (21364A)")
+		UNAME_MACHINE=alphaev79 ;;
+	esac
+	# A Pn.n version is a patched version.
+	# A Vn.n version is a released version.
+	# A Tn.n version is a released field test version.
+	# A Xn.n version is an unreleased experimental baselevel.
+	# 1.2 uses "1.2" for uname -r.
+	OSF_REL=`echo "$UNAME_RELEASE" | sed -e 's/^[PVTX]//' | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz`
+	GUESS=$UNAME_MACHINE-dec-osf$OSF_REL
+	;;
+    Amiga*:UNIX_System_V:4.0:*)
+	GUESS=m68k-unknown-sysv4
+	;;
+    *:[Aa]miga[Oo][Ss]:*:*)
+	GUESS=$UNAME_MACHINE-unknown-amigaos
+	;;
+    *:[Mm]orph[Oo][Ss]:*:*)
+	GUESS=$UNAME_MACHINE-unknown-morphos
+	;;
+    *:OS/390:*:*)
+	GUESS=i370-ibm-openedition
+	;;
+    *:z/VM:*:*)
+	GUESS=s390-ibm-zvmoe
+	;;
+    *:OS400:*:*)
+	GUESS=powerpc-ibm-os400
+	;;
+    arm:RISC*:1.[012]*:*|arm:riscix:1.[012]*:*)
+	GUESS=arm-acorn-riscix$UNAME_RELEASE
+	;;
+    arm*:riscos:*:*|arm*:RISCOS:*:*)
+	GUESS=arm-unknown-riscos
+	;;
+    SR2?01:HI-UX/MPP:*:* | SR8000:HI-UX/MPP:*:*)
+	GUESS=hppa1.1-hitachi-hiuxmpp
+	;;
+    Pyramid*:OSx*:*:* | MIS*:OSx*:*:* | MIS*:SMP_DC-OSx*:*:*)
+	# akee@wpdis03.wpafb.af.mil (Earle F. Ake) contributed MIS and NILE.
+	case `(/bin/universe) 2>/dev/null` in
+	    att) GUESS=pyramid-pyramid-sysv3 ;;
+	    *)   GUESS=pyramid-pyramid-bsd   ;;
+	esac
+	;;
+    NILE*:*:*:dcosx)
+	GUESS=pyramid-pyramid-svr4
+	;;
+    DRS?6000:unix:4.0:6*)
+	GUESS=sparc-icl-nx6
+	;;
+    DRS?6000:UNIX_SV:4.2*:7* | DRS?6000:isis:4.2*:7*)
+	case `/usr/bin/uname -p` in
+	    sparc) GUESS=sparc-icl-nx7 ;;
+	esac
+	;;
+    s390x:SunOS:*:*)
+	SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
+	GUESS=$UNAME_MACHINE-ibm-solaris2$SUN_REL
+	;;
+    sun4H:SunOS:5.*:*)
+	SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
+	GUESS=sparc-hal-solaris2$SUN_REL
+	;;
+    sun4*:SunOS:5.*:* | tadpole*:SunOS:5.*:*)
+	SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
+	GUESS=sparc-sun-solaris2$SUN_REL
+	;;
+    i86pc:AuroraUX:5.*:* | i86xen:AuroraUX:5.*:*)
+	GUESS=i386-pc-auroraux$UNAME_RELEASE
+	;;
+    i86pc:SunOS:5.*:* | i86xen:SunOS:5.*:*)
+	set_cc_for_build
+	SUN_ARCH=i386
+	# If there is a compiler, see if it is configured for 64-bit objects.
+	# Note that the Sun cc does not turn __LP64__ into 1 like gcc does.
+	# This test works for both compilers.
+	if test "$CC_FOR_BUILD" != no_compiler_found; then
+	    if (echo '#ifdef __amd64'; echo IS_64BIT_ARCH; echo '#endif') | \
+		(CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \
+		grep IS_64BIT_ARCH >/dev/null
+	    then
+		SUN_ARCH=x86_64
+	    fi
+	fi
+	SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
+	GUESS=$SUN_ARCH-pc-solaris2$SUN_REL
+	;;
+    sun4*:SunOS:6*:*)
+	# According to config.sub, this is the proper way to canonicalize
+	# SunOS6.  Hard to guess exactly what SunOS6 will be like, but
+	# it's likely to be more like Solaris than SunOS4.
+	SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
+	GUESS=sparc-sun-solaris3$SUN_REL
+	;;
+    sun4*:SunOS:*:*)
+	case `/usr/bin/arch -k` in
+	    Series*|S4*)
+		UNAME_RELEASE=`uname -v`
+		;;
+	esac
+	# Japanese Language versions have a version number like `4.1.3-JL'.
+	SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/-/_/'`
+	GUESS=sparc-sun-sunos$SUN_REL
+	;;
+    sun3*:SunOS:*:*)
+	GUESS=m68k-sun-sunos$UNAME_RELEASE
+	;;
+    sun*:*:4.2BSD:*)
+	UNAME_RELEASE=`(sed 1q /etc/motd | awk '{print substr($5,1,3)}') 2>/dev/null`
+	test "x$UNAME_RELEASE" = x && UNAME_RELEASE=3
+	case `/bin/arch` in
+	    sun3)
+		GUESS=m68k-sun-sunos$UNAME_RELEASE
+		;;
+	    sun4)
+		GUESS=sparc-sun-sunos$UNAME_RELEASE
+		;;
+	esac
+	;;
+    aushp:SunOS:*:*)
+	GUESS=sparc-auspex-sunos$UNAME_RELEASE
+	;;
+    # The situation for MiNT is a little confusing.  The machine name
+    # can be virtually everything (everything which is not
+    # "atarist" or "atariste" at least should have a processor
+    # > m68000).  The system name ranges from "MiNT" over "FreeMiNT"
+    # to the lowercase version "mint" (or "freemint").  Finally
+    # the system name "TOS" denotes a system which is actually not
+    # MiNT.  But MiNT is downward compatible to TOS, so this should
+    # be no problem.
+    atarist[e]:*MiNT:*:* | atarist[e]:*mint:*:* | atarist[e]:*TOS:*:*)
+	GUESS=m68k-atari-mint$UNAME_RELEASE
+	;;
+    atari*:*MiNT:*:* | atari*:*mint:*:* | atarist[e]:*TOS:*:*)
+	GUESS=m68k-atari-mint$UNAME_RELEASE
+	;;
+    *falcon*:*MiNT:*:* | *falcon*:*mint:*:* | *falcon*:*TOS:*:*)
+	GUESS=m68k-atari-mint$UNAME_RELEASE
+	;;
+    milan*:*MiNT:*:* | milan*:*mint:*:* | *milan*:*TOS:*:*)
+	GUESS=m68k-milan-mint$UNAME_RELEASE
+	;;
+    hades*:*MiNT:*:* | hades*:*mint:*:* | *hades*:*TOS:*:*)
+	GUESS=m68k-hades-mint$UNAME_RELEASE
+	;;
+    *:*MiNT:*:* | *:*mint:*:* | *:*TOS:*:*)
+	GUESS=m68k-unknown-mint$UNAME_RELEASE
+	;;
+    m68k:machten:*:*)
+	GUESS=m68k-apple-machten$UNAME_RELEASE
+	;;
+    powerpc:machten:*:*)
+	GUESS=powerpc-apple-machten$UNAME_RELEASE
+	;;
+    RISC*:Mach:*:*)
+	GUESS=mips-dec-mach_bsd4.3
+	;;
+    RISC*:ULTRIX:*:*)
+	GUESS=mips-dec-ultrix$UNAME_RELEASE
+	;;
+    VAX*:ULTRIX*:*:*)
+	GUESS=vax-dec-ultrix$UNAME_RELEASE
+	;;
+    2020:CLIX:*:* | 2430:CLIX:*:*)
+	GUESS=clipper-intergraph-clix$UNAME_RELEASE
+	;;
+    mips:*:*:UMIPS | mips:*:*:RISCos)
+	set_cc_for_build
+	sed 's/^	//' << EOF > "$dummy.c"
+#ifdef __cplusplus
+#include <stdio.h>  /* for printf() prototype */
+	int main (int argc, char *argv[]) {
+#else
+	int main (argc, argv) int argc; char *argv[]; {
+#endif
+	#if defined (host_mips) && defined (MIPSEB)
+	#if defined (SYSTYPE_SYSV)
+	  printf ("mips-mips-riscos%ssysv\\n", argv[1]); exit (0);
+	#endif
+	#if defined (SYSTYPE_SVR4)
+	  printf ("mips-mips-riscos%ssvr4\\n", argv[1]); exit (0);
+	#endif
+	#if defined (SYSTYPE_BSD43) || defined(SYSTYPE_BSD)
+	  printf ("mips-mips-riscos%sbsd\\n", argv[1]); exit (0);
+	#endif
+	#endif
+	  exit (-1);
+	}
+EOF
+	$CC_FOR_BUILD -o "$dummy" "$dummy.c" &&
+	  dummyarg=`echo "$UNAME_RELEASE" | sed -n 's/\([0-9]*\).*/\1/p'` &&
+	  SYSTEM_NAME=`"$dummy" "$dummyarg"` &&
+	    { echo "$SYSTEM_NAME"; exit; }
+	GUESS=mips-mips-riscos$UNAME_RELEASE
+	;;
+    Motorola:PowerMAX_OS:*:*)
+	GUESS=powerpc-motorola-powermax
+	;;
+    Motorola:*:4.3:PL8-*)
+	GUESS=powerpc-harris-powermax
+	;;
+    Night_Hawk:*:*:PowerMAX_OS | Synergy:PowerMAX_OS:*:*)
+	GUESS=powerpc-harris-powermax
+	;;
+    Night_Hawk:Power_UNIX:*:*)
+	GUESS=powerpc-harris-powerunix
+	;;
+    m88k:CX/UX:7*:*)
+	GUESS=m88k-harris-cxux7
+	;;
+    m88k:*:4*:R4*)
+	GUESS=m88k-motorola-sysv4
+	;;
+    m88k:*:3*:R3*)
+	GUESS=m88k-motorola-sysv3
+	;;
+    AViiON:dgux:*:*)
+	# DG/UX returns AViiON for all architectures
+	UNAME_PROCESSOR=`/usr/bin/uname -p`
+	if test "$UNAME_PROCESSOR" = mc88100 || test "$UNAME_PROCESSOR" = mc88110
+	then
+	    if test "$TARGET_BINARY_INTERFACE"x = m88kdguxelfx || \
+	       test "$TARGET_BINARY_INTERFACE"x = x
+	    then
+		GUESS=m88k-dg-dgux$UNAME_RELEASE
+	    else
+		GUESS=m88k-dg-dguxbcs$UNAME_RELEASE
+	    fi
+	else
+	    GUESS=i586-dg-dgux$UNAME_RELEASE
+	fi
+	;;
+    M88*:DolphinOS:*:*)	# DolphinOS (SVR3)
+	GUESS=m88k-dolphin-sysv3
+	;;
+    M88*:*:R3*:*)
+	# Delta 88k system running SVR3
+	GUESS=m88k-motorola-sysv3
+	;;
+    XD88*:*:*:*) # Tektronix XD88 system running UTekV (SVR3)
+	GUESS=m88k-tektronix-sysv3
+	;;
+    Tek43[0-9][0-9]:UTek:*:*) # Tektronix 4300 system running UTek (BSD)
+	GUESS=m68k-tektronix-bsd
+	;;
+    *:IRIX*:*:*)
+	IRIX_REL=`echo "$UNAME_RELEASE" | sed -e 's/-/_/g'`
+	GUESS=mips-sgi-irix$IRIX_REL
+	;;
+    ????????:AIX?:[12].1:2)   # AIX 2.2.1 or AIX 2.1.1 is RT/PC AIX.
+	GUESS=romp-ibm-aix    # uname -m gives an 8 hex-code CPU id
+	;;                    # Note that: echo "'`uname -s`'" gives 'AIX '
+    i*86:AIX:*:*)
+	GUESS=i386-ibm-aix
+	;;
+    ia64:AIX:*:*)
+	if test -x /usr/bin/oslevel ; then
+		IBM_REV=`/usr/bin/oslevel`
+	else
+		IBM_REV=$UNAME_VERSION.$UNAME_RELEASE
+	fi
+	GUESS=$UNAME_MACHINE-ibm-aix$IBM_REV
+	;;
+    *:AIX:2:3)
+	if grep bos325 /usr/include/stdio.h >/dev/null 2>&1; then
+		set_cc_for_build
+		sed 's/^		//' << EOF > "$dummy.c"
+		#include <sys/systemcfg.h>
+
+		main()
+			{
+			if (!__power_pc())
+				exit(1);
+			puts("powerpc-ibm-aix3.2.5");
+			exit(0);
+			}
+EOF
+		if $CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"`
+		then
+			GUESS=$SYSTEM_NAME
+		else
+			GUESS=rs6000-ibm-aix3.2.5
+		fi
+	elif grep bos324 /usr/include/stdio.h >/dev/null 2>&1; then
+		GUESS=rs6000-ibm-aix3.2.4
+	else
+		GUESS=rs6000-ibm-aix3.2
+	fi
+	;;
+    *:AIX:*:[4567])
+	IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | sed 1q | awk '{ print $1 }'`
+	if /usr/sbin/lsattr -El "$IBM_CPU_ID" | grep ' POWER' >/dev/null 2>&1; then
+		IBM_ARCH=rs6000
+	else
+		IBM_ARCH=powerpc
+	fi
+	if test -x /usr/bin/lslpp ; then
+		IBM_REV=`/usr/bin/lslpp -Lqc bos.rte.libc | \
+			   awk -F: '{ print $3 }' | sed s/[0-9]*$/0/`
+	else
+		IBM_REV=$UNAME_VERSION.$UNAME_RELEASE
+	fi
+	GUESS=$IBM_ARCH-ibm-aix$IBM_REV
+	;;
+    *:AIX:*:*)
+	GUESS=rs6000-ibm-aix
+	;;
+    ibmrt:4.4BSD:*|romp-ibm:4.4BSD:*)
+	GUESS=romp-ibm-bsd4.4
+	;;
+    ibmrt:*BSD:*|romp-ibm:BSD:*)            # covers RT/PC BSD and
+	GUESS=romp-ibm-bsd$UNAME_RELEASE    # 4.3 with uname added to
+	;;                                  # report: romp-ibm BSD 4.3
+    *:BOSX:*:*)
+	GUESS=rs6000-bull-bosx
+	;;
+    DPX/2?00:B.O.S.:*:*)
+	GUESS=m68k-bull-sysv3
+	;;
+    9000/[34]??:4.3bsd:1.*:*)
+	GUESS=m68k-hp-bsd
+	;;
+    hp300:4.4BSD:*:* | 9000/[34]??:4.3bsd:2.*:*)
+	GUESS=m68k-hp-bsd4.4
+	;;
+    9000/[34678]??:HP-UX:*:*)
+	HPUX_REV=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*.[0B]*//'`
+	case $UNAME_MACHINE in
+	    9000/31?)            HP_ARCH=m68000 ;;
+	    9000/[34]??)         HP_ARCH=m68k ;;
+	    9000/[678][0-9][0-9])
+		if test -x /usr/bin/getconf; then
+		    sc_cpu_version=`/usr/bin/getconf SC_CPU_VERSION 2>/dev/null`
+		    sc_kernel_bits=`/usr/bin/getconf SC_KERNEL_BITS 2>/dev/null`
+		    case $sc_cpu_version in
+		      523) HP_ARCH=hppa1.0 ;; # CPU_PA_RISC1_0
+		      528) HP_ARCH=hppa1.1 ;; # CPU_PA_RISC1_1
+		      532)                      # CPU_PA_RISC2_0
+			case $sc_kernel_bits in
+			  32) HP_ARCH=hppa2.0n ;;
+			  64) HP_ARCH=hppa2.0w ;;
+			  '') HP_ARCH=hppa2.0 ;;   # HP-UX 10.20
+			esac ;;
+		    esac
+		fi
+		if test "$HP_ARCH" = ""; then
+		    set_cc_for_build
+		    sed 's/^		//' << EOF > "$dummy.c"
+
+		#define _HPUX_SOURCE
+		#include <stdlib.h>
+		#include <unistd.h>
+
+		int main ()
+		{
+		#if defined(_SC_KERNEL_BITS)
+		    long bits = sysconf(_SC_KERNEL_BITS);
+		#endif
+		    long cpu  = sysconf (_SC_CPU_VERSION);
+
+		    switch (cpu)
+			{
+			case CPU_PA_RISC1_0: puts ("hppa1.0"); break;
+			case CPU_PA_RISC1_1: puts ("hppa1.1"); break;
+			case CPU_PA_RISC2_0:
+		#if defined(_SC_KERNEL_BITS)
+			    switch (bits)
+				{
+				case 64: puts ("hppa2.0w"); break;
+				case 32: puts ("hppa2.0n"); break;
+				default: puts ("hppa2.0"); break;
+				} break;
+		#else  /* !defined(_SC_KERNEL_BITS) */
+			    puts ("hppa2.0"); break;
+		#endif
+			default: puts ("hppa1.0"); break;
+			}
+		    exit (0);
+		}
+EOF
+		    (CCOPTS="" $CC_FOR_BUILD -o "$dummy" "$dummy.c" 2>/dev/null) && HP_ARCH=`"$dummy"`
+		    test -z "$HP_ARCH" && HP_ARCH=hppa
+		fi ;;
+	esac
+	if test "$HP_ARCH" = hppa2.0w
+	then
+	    set_cc_for_build
+
+	    # hppa2.0w-hp-hpux* has a 64-bit kernel and a compiler generating
+	    # 32-bit code.  hppa64-hp-hpux* has the same kernel and a compiler
+	    # generating 64-bit code.  GNU and HP use different nomenclature:
+	    #
+	    # $ CC_FOR_BUILD=cc ./config.guess
+	    # => hppa2.0w-hp-hpux11.23
+	    # $ CC_FOR_BUILD="cc +DA2.0w" ./config.guess
+	    # => hppa64-hp-hpux11.23
+
+	    if echo __LP64__ | (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) |
+		grep -q __LP64__
+	    then
+		HP_ARCH=hppa2.0w
+	    else
+		HP_ARCH=hppa64
+	    fi
+	fi
+	GUESS=$HP_ARCH-hp-hpux$HPUX_REV
+	;;
+    ia64:HP-UX:*:*)
+	HPUX_REV=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*.[0B]*//'`
+	GUESS=ia64-hp-hpux$HPUX_REV
+	;;
+    3050*:HI-UX:*:*)
+	set_cc_for_build
+	sed 's/^	//' << EOF > "$dummy.c"
+	#include <unistd.h>
+	int
+	main ()
+	{
+	  long cpu = sysconf (_SC_CPU_VERSION);
+	  /* The order matters, because CPU_IS_HP_MC68K erroneously returns
+	     true for CPU_PA_RISC1_0.  CPU_IS_PA_RISC returns correct
+	     results, however.  */
+	  if (CPU_IS_PA_RISC (cpu))
+	    {
+	      switch (cpu)
+		{
+		  case CPU_PA_RISC1_0: puts ("hppa1.0-hitachi-hiuxwe2"); break;
+		  case CPU_PA_RISC1_1: puts ("hppa1.1-hitachi-hiuxwe2"); break;
+		  case CPU_PA_RISC2_0: puts ("hppa2.0-hitachi-hiuxwe2"); break;
+		  default: puts ("hppa-hitachi-hiuxwe2"); break;
+		}
+	    }
+	  else if (CPU_IS_HP_MC68K (cpu))
+	    puts ("m68k-hitachi-hiuxwe2");
+	  else puts ("unknown-hitachi-hiuxwe2");
+	  exit (0);
+	}
+EOF
+	$CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"` &&
+		{ echo "$SYSTEM_NAME"; exit; }
+	GUESS=unknown-hitachi-hiuxwe2
+	;;
+    9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:*)
+	GUESS=hppa1.1-hp-bsd
+	;;
+    9000/8??:4.3bsd:*:*)
+	GUESS=hppa1.0-hp-bsd
+	;;
+    *9??*:MPE/iX:*:* | *3000*:MPE/iX:*:*)
+	GUESS=hppa1.0-hp-mpeix
+	;;
+    hp7??:OSF1:*:* | hp8?[79]:OSF1:*:*)
+	GUESS=hppa1.1-hp-osf
+	;;
+    hp8??:OSF1:*:*)
+	GUESS=hppa1.0-hp-osf
+	;;
+    i*86:OSF1:*:*)
+	if test -x /usr/sbin/sysversion ; then
+	    GUESS=$UNAME_MACHINE-unknown-osf1mk
+	else
+	    GUESS=$UNAME_MACHINE-unknown-osf1
+	fi
+	;;
+    parisc*:Lites*:*:*)
+	GUESS=hppa1.1-hp-lites
+	;;
+    C1*:ConvexOS:*:* | convex:ConvexOS:C1*:*)
+	GUESS=c1-convex-bsd
+	;;
+    C2*:ConvexOS:*:* | convex:ConvexOS:C2*:*)
+	if getsysinfo -f scalar_acc
+	then echo c32-convex-bsd
+	else echo c2-convex-bsd
+	fi
+	exit ;;
+    C34*:ConvexOS:*:* | convex:ConvexOS:C34*:*)
+	GUESS=c34-convex-bsd
+	;;
+    C38*:ConvexOS:*:* | convex:ConvexOS:C38*:*)
+	GUESS=c38-convex-bsd
+	;;
+    C4*:ConvexOS:*:* | convex:ConvexOS:C4*:*)
+	GUESS=c4-convex-bsd
+	;;
+    CRAY*Y-MP:*:*:*)
+	CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'`
+	GUESS=ymp-cray-unicos$CRAY_REL
+	;;
+    CRAY*[A-Z]90:*:*:*)
+	echo "$UNAME_MACHINE"-cray-unicos"$UNAME_RELEASE" \
+	| sed -e 's/CRAY.*\([A-Z]90\)/\1/' \
+	      -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/ \
+	      -e 's/\.[^.]*$/.X/'
+	exit ;;
+    CRAY*TS:*:*:*)
+	CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'`
+	GUESS=t90-cray-unicos$CRAY_REL
+	;;
+    CRAY*T3E:*:*:*)
+	CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'`
+	GUESS=alphaev5-cray-unicosmk$CRAY_REL
+	;;
+    CRAY*SV1:*:*:*)
+	CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'`
+	GUESS=sv1-cray-unicos$CRAY_REL
+	;;
+    *:UNICOS/mp:*:*)
+	CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'`
+	GUESS=craynv-cray-unicosmp$CRAY_REL
+	;;
+    F30[01]:UNIX_System_V:*:* | F700:UNIX_System_V:*:*)
+	FUJITSU_PROC=`uname -m | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz`
+	FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'`
+	FUJITSU_REL=`echo "$UNAME_RELEASE" | sed -e 's/ /_/'`
+	GUESS=${FUJITSU_PROC}-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}
+	;;
+    5000:UNIX_System_V:4.*:*)
+	FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'`
+	FUJITSU_REL=`echo "$UNAME_RELEASE" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/ /_/'`
+	GUESS=sparc-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}
+	;;
+    i*86:BSD/386:*:* | i*86:BSD/OS:*:* | *:Ascend\ Embedded/OS:*:*)
+	GUESS=$UNAME_MACHINE-pc-bsdi$UNAME_RELEASE
+	;;
+    sparc*:BSD/OS:*:*)
+	GUESS=sparc-unknown-bsdi$UNAME_RELEASE
+	;;
+    *:BSD/OS:*:*)
+	GUESS=$UNAME_MACHINE-unknown-bsdi$UNAME_RELEASE
+	;;
+    arm:FreeBSD:*:*)
+	UNAME_PROCESSOR=`uname -p`
+	set_cc_for_build
+	if echo __ARM_PCS_VFP | $CC_FOR_BUILD -E - 2>/dev/null \
+	    | grep -q __ARM_PCS_VFP
+	then
+	    FREEBSD_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'`
+	    GUESS=$UNAME_PROCESSOR-unknown-freebsd$FREEBSD_REL-gnueabi
+	else
+	    FREEBSD_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'`
+	    GUESS=$UNAME_PROCESSOR-unknown-freebsd$FREEBSD_REL-gnueabihf
+	fi
+	;;
+    *:FreeBSD:*:*)
+	UNAME_PROCESSOR=`/usr/bin/uname -p`
+	case $UNAME_PROCESSOR in
+	    amd64)
+		UNAME_PROCESSOR=x86_64 ;;
+	    i386)
+		UNAME_PROCESSOR=i586 ;;
+	esac
+	FREEBSD_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'`
+	GUESS=$UNAME_PROCESSOR-unknown-freebsd$FREEBSD_REL
+	;;
+    i*:CYGWIN*:*)
+	GUESS=$UNAME_MACHINE-pc-cygwin
+	;;
+    *:MINGW64*:*)
+	GUESS=$UNAME_MACHINE-pc-mingw64
+	;;
+    *:MINGW*:*)
+	GUESS=$UNAME_MACHINE-pc-mingw32
+	;;
+    *:MSYS*:*)
+	GUESS=$UNAME_MACHINE-pc-msys
+	;;
+    i*:PW*:*)
+	GUESS=$UNAME_MACHINE-pc-pw32
+	;;
+    *:Interix*:*)
+	case $UNAME_MACHINE in
+	    x86)
+		GUESS=i586-pc-interix$UNAME_RELEASE
+		;;
+	    authenticamd | genuineintel | EM64T)
+		GUESS=x86_64-unknown-interix$UNAME_RELEASE
+		;;
+	    IA64)
+		GUESS=ia64-unknown-interix$UNAME_RELEASE
+		;;
+	esac ;;
+    i*:UWIN*:*)
+	GUESS=$UNAME_MACHINE-pc-uwin
+	;;
+    amd64:CYGWIN*:*:* | x86_64:CYGWIN*:*:*)
+	GUESS=x86_64-pc-cygwin
+	;;
+    prep*:SunOS:5.*:*)
+	SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
+	GUESS=powerpcle-unknown-solaris2$SUN_REL
+	;;
+    *:GNU:*:*)
+	# the GNU system
+	GNU_ARCH=`echo "$UNAME_MACHINE" | sed -e 's,[-/].*$,,'`
+	GNU_REL=`echo "$UNAME_RELEASE" | sed -e 's,/.*$,,'`
+	GUESS=$GNU_ARCH-unknown-$LIBC$GNU_REL
+	;;
+    *:GNU/*:*:*)
+	# other systems with GNU libc and userland
+	GNU_SYS=`echo "$UNAME_SYSTEM" | sed 's,^[^/]*/,,' | tr "[:upper:]" "[:lower:]"`
+	GNU_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'`
+	GUESS=$UNAME_MACHINE-unknown-$GNU_SYS$GNU_REL-$LIBC
+	;;
+    *:Minix:*:*)
+	GUESS=$UNAME_MACHINE-unknown-minix
+	;;
+    aarch64:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    aarch64_be:Linux:*:*)
+	UNAME_MACHINE=aarch64_be
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    alpha:Linux:*:*)
+	case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' /proc/cpuinfo 2>/dev/null` in
+	  EV5)   UNAME_MACHINE=alphaev5 ;;
+	  EV56)  UNAME_MACHINE=alphaev56 ;;
+	  PCA56) UNAME_MACHINE=alphapca56 ;;
+	  PCA57) UNAME_MACHINE=alphapca56 ;;
+	  EV6)   UNAME_MACHINE=alphaev6 ;;
+	  EV67)  UNAME_MACHINE=alphaev67 ;;
+	  EV68*) UNAME_MACHINE=alphaev68 ;;
+	esac
+	objdump --private-headers /bin/sh | grep -q ld.so.1
+	if test "$?" = 0 ; then LIBC=gnulibc1 ; fi
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    arc:Linux:*:* | arceb:Linux:*:* | arc32:Linux:*:* | arc64:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    arm*:Linux:*:*)
+	set_cc_for_build
+	if echo __ARM_EABI__ | $CC_FOR_BUILD -E - 2>/dev/null \
+	    | grep -q __ARM_EABI__
+	then
+	    GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	else
+	    if echo __ARM_PCS_VFP | $CC_FOR_BUILD -E - 2>/dev/null \
+		| grep -q __ARM_PCS_VFP
+	    then
+		GUESS=$UNAME_MACHINE-unknown-linux-${LIBC}eabi
+	    else
+		GUESS=$UNAME_MACHINE-unknown-linux-${LIBC}eabihf
+	    fi
+	fi
+	;;
+    avr32*:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    cris:Linux:*:*)
+	GUESS=$UNAME_MACHINE-axis-linux-$LIBC
+	;;
+    crisv32:Linux:*:*)
+	GUESS=$UNAME_MACHINE-axis-linux-$LIBC
+	;;
+    e2k:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    frv:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    hexagon:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    i*86:Linux:*:*)
+	GUESS=$UNAME_MACHINE-pc-linux-$LIBC
+	;;
+    ia64:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    k1om:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    loongarch32:Linux:*:* | loongarch64:Linux:*:* | loongarchx32:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    m32r*:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    m68*:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    mips:Linux:*:* | mips64:Linux:*:*)
+	set_cc_for_build
+	IS_GLIBC=0
+	test x"${LIBC}" = xgnu && IS_GLIBC=1
+	sed 's/^	//' << EOF > "$dummy.c"
+	#undef CPU
+	#undef mips
+	#undef mipsel
+	#undef mips64
+	#undef mips64el
+	#if ${IS_GLIBC} && defined(_ABI64)
+	LIBCABI=gnuabi64
+	#else
+	#if ${IS_GLIBC} && defined(_ABIN32)
+	LIBCABI=gnuabin32
+	#else
+	LIBCABI=${LIBC}
+	#endif
+	#endif
+
+	#if ${IS_GLIBC} && defined(__mips64) && defined(__mips_isa_rev) && __mips_isa_rev>=6
+	CPU=mipsisa64r6
+	#else
+	#if ${IS_GLIBC} && !defined(__mips64) && defined(__mips_isa_rev) && __mips_isa_rev>=6
+	CPU=mipsisa32r6
+	#else
+	#if defined(__mips64)
+	CPU=mips64
+	#else
+	CPU=mips
+	#endif
+	#endif
+	#endif
+
+	#if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL)
+	MIPS_ENDIAN=el
+	#else
+	#if defined(__MIPSEB__) || defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB)
+	MIPS_ENDIAN=
+	#else
+	MIPS_ENDIAN=
+	#endif
+	#endif
+EOF
+	cc_set_vars=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^CPU\|^MIPS_ENDIAN\|^LIBCABI'`
+	eval "$cc_set_vars"
+	test "x$CPU" != x && { echo "$CPU${MIPS_ENDIAN}-unknown-linux-$LIBCABI"; exit; }
+	;;
+    mips64el:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    openrisc*:Linux:*:*)
+	GUESS=or1k-unknown-linux-$LIBC
+	;;
+    or32:Linux:*:* | or1k*:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    padre:Linux:*:*)
+	GUESS=sparc-unknown-linux-$LIBC
+	;;
+    parisc64:Linux:*:* | hppa64:Linux:*:*)
+	GUESS=hppa64-unknown-linux-$LIBC
+	;;
+    parisc:Linux:*:* | hppa:Linux:*:*)
+	# Look for CPU level
+	case `grep '^cpu[^a-z]*:' /proc/cpuinfo 2>/dev/null | cut -d' ' -f2` in
+	  PA7*) GUESS=hppa1.1-unknown-linux-$LIBC ;;
+	  PA8*) GUESS=hppa2.0-unknown-linux-$LIBC ;;
+	  *)    GUESS=hppa-unknown-linux-$LIBC ;;
+	esac
+	;;
+    ppc64:Linux:*:*)
+	GUESS=powerpc64-unknown-linux-$LIBC
+	;;
+    ppc:Linux:*:*)
+	GUESS=powerpc-unknown-linux-$LIBC
+	;;
+    ppc64le:Linux:*:*)
+	GUESS=powerpc64le-unknown-linux-$LIBC
+	;;
+    ppcle:Linux:*:*)
+	GUESS=powerpcle-unknown-linux-$LIBC
+	;;
+    riscv32:Linux:*:* | riscv32be:Linux:*:* | riscv64:Linux:*:* | riscv64be:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    s390:Linux:*:* | s390x:Linux:*:*)
+	GUESS=$UNAME_MACHINE-ibm-linux-$LIBC
+	;;
+    sh64*:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    sh*:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    sparc:Linux:*:* | sparc64:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    tile*:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    vax:Linux:*:*)
+	GUESS=$UNAME_MACHINE-dec-linux-$LIBC
+	;;
+    x86_64:Linux:*:*)
+	set_cc_for_build
+	LIBCABI=$LIBC
+	if test "$CC_FOR_BUILD" != no_compiler_found; then
+	    if (echo '#ifdef __ILP32__'; echo IS_X32; echo '#endif') | \
+		(CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \
+		grep IS_X32 >/dev/null
+	    then
+		LIBCABI=${LIBC}x32
+	    fi
+	fi
+	GUESS=$UNAME_MACHINE-pc-linux-$LIBCABI
+	;;
+    xtensa*:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    i*86:DYNIX/ptx:4*:*)
+	# ptx 4.0 does uname -s correctly, with DYNIX/ptx in there.
+	# earlier versions are messed up and put the nodename in both
+	# sysname and nodename.
+	GUESS=i386-sequent-sysv4
+	;;
+    i*86:UNIX_SV:4.2MP:2.*)
+	# Unixware is an offshoot of SVR4, but it has its own version
+	# number series starting with 2...
+	# I am not positive that other SVR4 systems won't match this,
+	# I just have to hope.  -- rms.
+	# Use sysv4.2uw... so that sysv4* matches it.
+	GUESS=$UNAME_MACHINE-pc-sysv4.2uw$UNAME_VERSION
+	;;
+    i*86:OS/2:*:*)
+	# If we were able to find `uname', then EMX Unix compatibility
+	# is probably installed.
+	GUESS=$UNAME_MACHINE-pc-os2-emx
+	;;
+    i*86:XTS-300:*:STOP)
+	GUESS=$UNAME_MACHINE-unknown-stop
+	;;
+    i*86:atheos:*:*)
+	GUESS=$UNAME_MACHINE-unknown-atheos
+	;;
+    i*86:syllable:*:*)
+	GUESS=$UNAME_MACHINE-pc-syllable
+	;;
+    i*86:LynxOS:2.*:* | i*86:LynxOS:3.[01]*:* | i*86:LynxOS:4.[02]*:*)
+	GUESS=i386-unknown-lynxos$UNAME_RELEASE
+	;;
+    i*86:*DOS:*:*)
+	GUESS=$UNAME_MACHINE-pc-msdosdjgpp
+	;;
+    i*86:*:4.*:*)
+	UNAME_REL=`echo "$UNAME_RELEASE" | sed 's/\/MP$//'`
+	if grep Novell /usr/include/link.h >/dev/null 2>/dev/null; then
+		GUESS=$UNAME_MACHINE-univel-sysv$UNAME_REL
+	else
+		GUESS=$UNAME_MACHINE-pc-sysv$UNAME_REL
+	fi
+	;;
+    i*86:*:5:[678]*)
+	# UnixWare 7.x, OpenUNIX and OpenServer 6.
+	case `/bin/uname -X | grep "^Machine"` in
+	    *486*)	     UNAME_MACHINE=i486 ;;
+	    *Pentium)	     UNAME_MACHINE=i586 ;;
+	    *Pent*|*Celeron) UNAME_MACHINE=i686 ;;
+	esac
+	GUESS=$UNAME_MACHINE-unknown-sysv${UNAME_RELEASE}${UNAME_SYSTEM}${UNAME_VERSION}
+	;;
+    i*86:*:3.2:*)
+	if test -f /usr/options/cb.name; then
+		UNAME_REL=`sed -n 's/.*Version //p' </usr/options/cb.name`
+		GUESS=$UNAME_MACHINE-pc-isc$UNAME_REL
+	elif /bin/uname -X 2>/dev/null >/dev/null ; then
+		UNAME_REL=`(/bin/uname -X|grep Release|sed -e 's/.*= //')`
+		(/bin/uname -X|grep i80486 >/dev/null) && UNAME_MACHINE=i486
+		(/bin/uname -X|grep '^Machine.*Pentium' >/dev/null) \
+			&& UNAME_MACHINE=i586
+		(/bin/uname -X|grep '^Machine.*Pent *II' >/dev/null) \
+			&& UNAME_MACHINE=i686
+		(/bin/uname -X|grep '^Machine.*Pentium Pro' >/dev/null) \
+			&& UNAME_MACHINE=i686
+		GUESS=$UNAME_MACHINE-pc-sco$UNAME_REL
+	else
+		GUESS=$UNAME_MACHINE-pc-sysv32
+	fi
+	;;
+    pc:*:*:*)
+	# Left here for compatibility:
+	# uname -m prints for DJGPP always 'pc', but it prints nothing about
+	# the processor, so we play safe by assuming i586.
+	# Note: whatever this is, it MUST be the same as what config.sub
+	# prints for the "djgpp" host, or else GDB configure will decide that
+	# this is a cross-build.
+	GUESS=i586-pc-msdosdjgpp
+	;;
+    Intel:Mach:3*:*)
+	GUESS=i386-pc-mach3
+	;;
+    paragon:*:*:*)
+	GUESS=i860-intel-osf1
+	;;
+    i860:*:4.*:*) # i860-SVR4
+	if grep Stardent /usr/include/sys/uadmin.h >/dev/null 2>&1 ; then
+	  GUESS=i860-stardent-sysv$UNAME_RELEASE    # Stardent Vistra i860-SVR4
+	else # Add other i860-SVR4 vendors below as they are discovered.
+	  GUESS=i860-unknown-sysv$UNAME_RELEASE     # Unknown i860-SVR4
+	fi
+	;;
+    mini*:CTIX:SYS*5:*)
+	# "miniframe"
+	GUESS=m68010-convergent-sysv
+	;;
+    mc68k:UNIX:SYSTEM5:3.51m)
+	GUESS=m68k-convergent-sysv
+	;;
+    M680?0:D-NIX:5.3:*)
+	GUESS=m68k-diab-dnix
+	;;
+    M68*:*:R3V[5678]*:*)
+	test -r /sysV68 && { echo 'm68k-motorola-sysv'; exit; } ;;
+    3[345]??:*:4.0:3.0 | 3[34]??A:*:4.0:3.0 | 3[34]??,*:*:4.0:3.0 | 3[34]??/*:*:4.0:3.0 | 4400:*:4.0:3.0 | 4850:*:4.0:3.0 | SKA40:*:4.0:3.0 | SDS2:*:4.0:3.0 | SHG2:*:4.0:3.0 | S7501*:*:4.0:3.0)
+	OS_REL=''
+	test -r /etc/.relid \
+	&& OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid`
+	/bin/uname -p 2>/dev/null | grep 86 >/dev/null \
+	  && { echo i486-ncr-sysv4.3"$OS_REL"; exit; }
+	/bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \
+	  && { echo i586-ncr-sysv4.3"$OS_REL"; exit; } ;;
+    3[34]??:*:4.0:* | 3[34]??,*:*:4.0:*)
+	/bin/uname -p 2>/dev/null | grep 86 >/dev/null \
+	  && { echo i486-ncr-sysv4; exit; } ;;
+    NCR*:*:4.2:* | MPRAS*:*:4.2:*)
+	OS_REL='.3'
+	test -r /etc/.relid \
+	    && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid`
+	/bin/uname -p 2>/dev/null | grep 86 >/dev/null \
+	    && { echo i486-ncr-sysv4.3"$OS_REL"; exit; }
+	/bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \
+	    && { echo i586-ncr-sysv4.3"$OS_REL"; exit; }
+	/bin/uname -p 2>/dev/null | /bin/grep pteron >/dev/null \
+	    && { echo i586-ncr-sysv4.3"$OS_REL"; exit; } ;;
+    m68*:LynxOS:2.*:* | m68*:LynxOS:3.0*:*)
+	GUESS=m68k-unknown-lynxos$UNAME_RELEASE
+	;;
+    mc68030:UNIX_System_V:4.*:*)
+	GUESS=m68k-atari-sysv4
+	;;
+    TSUNAMI:LynxOS:2.*:*)
+	GUESS=sparc-unknown-lynxos$UNAME_RELEASE
+	;;
+    rs6000:LynxOS:2.*:*)
+	GUESS=rs6000-unknown-lynxos$UNAME_RELEASE
+	;;
+    PowerPC:LynxOS:2.*:* | PowerPC:LynxOS:3.[01]*:* | PowerPC:LynxOS:4.[02]*:*)
+	GUESS=powerpc-unknown-lynxos$UNAME_RELEASE
+	;;
+    SM[BE]S:UNIX_SV:*:*)
+	GUESS=mips-dde-sysv$UNAME_RELEASE
+	;;
+    RM*:ReliantUNIX-*:*:*)
+	GUESS=mips-sni-sysv4
+	;;
+    RM*:SINIX-*:*:*)
+	GUESS=mips-sni-sysv4
+	;;
+    *:SINIX-*:*:*)
+	if uname -p 2>/dev/null >/dev/null ; then
+		UNAME_MACHINE=`(uname -p) 2>/dev/null`
+		GUESS=$UNAME_MACHINE-sni-sysv4
+	else
+		GUESS=ns32k-sni-sysv
+	fi
+	;;
+    PENTIUM:*:4.0*:*)	# Unisys `ClearPath HMP IX 4000' SVR4/MP effort
+			# says <Richard.M.Bartel@ccMail.Census.GOV>
+	GUESS=i586-unisys-sysv4
+	;;
+    *:UNIX_System_V:4*:FTX*)
+	# From Gerald Hewes <hewes@openmarket.com>.
+	# How about differentiating between stratus architectures? -djm
+	GUESS=hppa1.1-stratus-sysv4
+	;;
+    *:*:*:FTX*)
+	# From seanf@swdc.stratus.com.
+	GUESS=i860-stratus-sysv4
+	;;
+    i*86:VOS:*:*)
+	# From Paul.Green@stratus.com.
+	GUESS=$UNAME_MACHINE-stratus-vos
+	;;
+    *:VOS:*:*)
+	# From Paul.Green@stratus.com.
+	GUESS=hppa1.1-stratus-vos
+	;;
+    mc68*:A/UX:*:*)
+	GUESS=m68k-apple-aux$UNAME_RELEASE
+	;;
+    news*:NEWS-OS:6*:*)
+	GUESS=mips-sony-newsos6
+	;;
+    R[34]000:*System_V*:*:* | R4000:UNIX_SYSV:*:* | R*000:UNIX_SV:*:*)
+	if test -d /usr/nec; then
+		GUESS=mips-nec-sysv$UNAME_RELEASE
+	else
+		GUESS=mips-unknown-sysv$UNAME_RELEASE
+	fi
+	;;
+    BeBox:BeOS:*:*)	# BeOS running on hardware made by Be, PPC only.
+	GUESS=powerpc-be-beos
+	;;
+    BeMac:BeOS:*:*)	# BeOS running on Mac or Mac clone, PPC only.
+	GUESS=powerpc-apple-beos
+	;;
+    BePC:BeOS:*:*)	# BeOS running on Intel PC compatible.
+	GUESS=i586-pc-beos
+	;;
+    BePC:Haiku:*:*)	# Haiku running on Intel PC compatible.
+	GUESS=i586-pc-haiku
+	;;
+    x86_64:Haiku:*:*)
+	GUESS=x86_64-unknown-haiku
+	;;
+    SX-4:SUPER-UX:*:*)
+	GUESS=sx4-nec-superux$UNAME_RELEASE
+	;;
+    SX-5:SUPER-UX:*:*)
+	GUESS=sx5-nec-superux$UNAME_RELEASE
+	;;
+    SX-6:SUPER-UX:*:*)
+	GUESS=sx6-nec-superux$UNAME_RELEASE
+	;;
+    SX-7:SUPER-UX:*:*)
+	GUESS=sx7-nec-superux$UNAME_RELEASE
+	;;
+    SX-8:SUPER-UX:*:*)
+	GUESS=sx8-nec-superux$UNAME_RELEASE
+	;;
+    SX-8R:SUPER-UX:*:*)
+	GUESS=sx8r-nec-superux$UNAME_RELEASE
+	;;
+    SX-ACE:SUPER-UX:*:*)
+	GUESS=sxace-nec-superux$UNAME_RELEASE
+	;;
+    Power*:Rhapsody:*:*)
+	GUESS=powerpc-apple-rhapsody$UNAME_RELEASE
+	;;
+    *:Rhapsody:*:*)
+	GUESS=$UNAME_MACHINE-apple-rhapsody$UNAME_RELEASE
+	;;
+    arm64:Darwin:*:*)
+	GUESS=aarch64-apple-darwin$UNAME_RELEASE
+	;;
+    *:Darwin:*:*)
+	UNAME_PROCESSOR=`uname -p`
+	case $UNAME_PROCESSOR in
+	    unknown) UNAME_PROCESSOR=powerpc ;;
+	esac
+	if command -v xcode-select > /dev/null 2> /dev/null && \
+		! xcode-select --print-path > /dev/null 2> /dev/null ; then
+	    # Avoid executing cc if there is no toolchain installed as
+	    # cc will be a stub that puts up a graphical alert
+	    # prompting the user to install developer tools.
+	    CC_FOR_BUILD=no_compiler_found
+	else
+	    set_cc_for_build
+	fi
+	if test "$CC_FOR_BUILD" != no_compiler_found; then
+	    if (echo '#ifdef __LP64__'; echo IS_64BIT_ARCH; echo '#endif') | \
+		   (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \
+		   grep IS_64BIT_ARCH >/dev/null
+	    then
+		case $UNAME_PROCESSOR in
+		    i386) UNAME_PROCESSOR=x86_64 ;;
+		    powerpc) UNAME_PROCESSOR=powerpc64 ;;
+		esac
+	    fi
+	    # On 10.4-10.6 one might compile for PowerPC via gcc -arch ppc
+	    if (echo '#ifdef __POWERPC__'; echo IS_PPC; echo '#endif') | \
+		   (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \
+		   grep IS_PPC >/dev/null
+	    then
+		UNAME_PROCESSOR=powerpc
+	    fi
+	elif test "$UNAME_PROCESSOR" = i386 ; then
+	    # uname -m returns i386 or x86_64
+	    UNAME_PROCESSOR=$UNAME_MACHINE
+	fi
+	GUESS=$UNAME_PROCESSOR-apple-darwin$UNAME_RELEASE
+	;;
+    *:procnto*:*:* | *:QNX:[0123456789]*:*)
+	UNAME_PROCESSOR=`uname -p`
+	if test "$UNAME_PROCESSOR" = x86; then
+		UNAME_PROCESSOR=i386
+		UNAME_MACHINE=pc
+	fi
+	GUESS=$UNAME_PROCESSOR-$UNAME_MACHINE-nto-qnx$UNAME_RELEASE
+	;;
+    *:QNX:*:4*)
+	GUESS=i386-pc-qnx
+	;;
+    NEO-*:NONSTOP_KERNEL:*:*)
+	GUESS=neo-tandem-nsk$UNAME_RELEASE
+	;;
+    NSE-*:NONSTOP_KERNEL:*:*)
+	GUESS=nse-tandem-nsk$UNAME_RELEASE
+	;;
+    NSR-*:NONSTOP_KERNEL:*:*)
+	GUESS=nsr-tandem-nsk$UNAME_RELEASE
+	;;
+    NSV-*:NONSTOP_KERNEL:*:*)
+	GUESS=nsv-tandem-nsk$UNAME_RELEASE
+	;;
+    NSX-*:NONSTOP_KERNEL:*:*)
+	GUESS=nsx-tandem-nsk$UNAME_RELEASE
+	;;
+    *:NonStop-UX:*:*)
+	GUESS=mips-compaq-nonstopux
+	;;
+    BS2000:POSIX*:*:*)
+	GUESS=bs2000-siemens-sysv
+	;;
+    DS/*:UNIX_System_V:*:*)
+	GUESS=$UNAME_MACHINE-$UNAME_SYSTEM-$UNAME_RELEASE
+	;;
+    *:Plan9:*:*)
+	# "uname -m" is not consistent, so use $cputype instead. 386
+	# is converted to i386 for consistency with other x86
+	# operating systems.
+	if test "${cputype-}" = 386; then
+	    UNAME_MACHINE=i386
+	elif test "x${cputype-}" != x; then
+	    UNAME_MACHINE=$cputype
+	fi
+	GUESS=$UNAME_MACHINE-unknown-plan9
+	;;
+    *:TOPS-10:*:*)
+	GUESS=pdp10-unknown-tops10
+	;;
+    *:TENEX:*:*)
+	GUESS=pdp10-unknown-tenex
+	;;
+    KS10:TOPS-20:*:* | KL10:TOPS-20:*:* | TYPE4:TOPS-20:*:*)
+	GUESS=pdp10-dec-tops20
+	;;
+    XKL-1:TOPS-20:*:* | TYPE5:TOPS-20:*:*)
+	GUESS=pdp10-xkl-tops20
+	;;
+    *:TOPS-20:*:*)
+	GUESS=pdp10-unknown-tops20
+	;;
+    *:ITS:*:*)
+	GUESS=pdp10-unknown-its
+	;;
+    SEI:*:*:SEIUX)
+	GUESS=mips-sei-seiux$UNAME_RELEASE
+	;;
+    *:DragonFly:*:*)
+	DRAGONFLY_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'`
+	GUESS=$UNAME_MACHINE-unknown-dragonfly$DRAGONFLY_REL
+	;;
+    *:*VMS:*:*)
+	UNAME_MACHINE=`(uname -p) 2>/dev/null`
+	case $UNAME_MACHINE in
+	    A*) GUESS=alpha-dec-vms ;;
+	    I*) GUESS=ia64-dec-vms ;;
+	    V*) GUESS=vax-dec-vms ;;
+	esac ;;
+    *:XENIX:*:SysV)
+	GUESS=i386-pc-xenix
+	;;
+    i*86:skyos:*:*)
+	SKYOS_REL=`echo "$UNAME_RELEASE" | sed -e 's/ .*$//'`
+	GUESS=$UNAME_MACHINE-pc-skyos$SKYOS_REL
+	;;
+    i*86:rdos:*:*)
+	GUESS=$UNAME_MACHINE-pc-rdos
+	;;
+    *:AROS:*:*)
+	GUESS=$UNAME_MACHINE-unknown-aros
+	;;
+    x86_64:VMkernel:*:*)
+	GUESS=$UNAME_MACHINE-unknown-esx
+	;;
+    amd64:Isilon\ OneFS:*:*)
+	GUESS=x86_64-unknown-onefs
+	;;
+    *:Unleashed:*:*)
+	GUESS=$UNAME_MACHINE-unknown-unleashed$UNAME_RELEASE
+	;;
+esac
+
+# Do we have a guess based on uname results?
+if test "x$GUESS" != x; then
+    echo "$GUESS"
+    exit
+fi
+
+# No uname command or uname output not recognized.
+set_cc_for_build
+cat > "$dummy.c" <<EOF
+#ifdef _SEQUENT_
+#include <sys/types.h>
+#include <sys/utsname.h>
+#endif
+#if defined(ultrix) || defined(_ultrix) || defined(__ultrix) || defined(__ultrix__)
+#if defined (vax) || defined (__vax) || defined (__vax__) || defined(mips) || defined(__mips) || defined(__mips__) || defined(MIPS) || defined(__MIPS__)
+#include <signal.h>
+#if defined(_SIZE_T_) || defined(SIGLOST)
+#include <sys/utsname.h>
+#endif
+#endif
+#endif
+main ()
+{
+#if defined (sony)
+#if defined (MIPSEB)
+  /* BFD wants "bsd" instead of "newsos".  Perhaps BFD should be changed,
+     I don't know....  */
+  printf ("mips-sony-bsd\n"); exit (0);
+#else
+#include <sys/param.h>
+  printf ("m68k-sony-newsos%s\n",
+#ifdef NEWSOS4
+  "4"
+#else
+  ""
+#endif
+  ); exit (0);
+#endif
+#endif
+
+#if defined (NeXT)
+#if !defined (__ARCHITECTURE__)
+#define __ARCHITECTURE__ "m68k"
+#endif
+  int version;
+  version=`(hostinfo | sed -n 's/.*NeXT Mach \([0-9]*\).*/\1/p') 2>/dev/null`;
+  if (version < 4)
+    printf ("%s-next-nextstep%d\n", __ARCHITECTURE__, version);
+  else
+    printf ("%s-next-openstep%d\n", __ARCHITECTURE__, version);
+  exit (0);
+#endif
+
+#if defined (MULTIMAX) || defined (n16)
+#if defined (UMAXV)
+  printf ("ns32k-encore-sysv\n"); exit (0);
+#else
+#if defined (CMU)
+  printf ("ns32k-encore-mach\n"); exit (0);
+#else
+  printf ("ns32k-encore-bsd\n"); exit (0);
+#endif
+#endif
+#endif
+
+#if defined (__386BSD__)
+  printf ("i386-pc-bsd\n"); exit (0);
+#endif
+
+#if defined (sequent)
+#if defined (i386)
+  printf ("i386-sequent-dynix\n"); exit (0);
+#endif
+#if defined (ns32000)
+  printf ("ns32k-sequent-dynix\n"); exit (0);
+#endif
+#endif
+
+#if defined (_SEQUENT_)
+  struct utsname un;
+
+  uname(&un);
+  if (strncmp(un.version, "V2", 2) == 0) {
+    printf ("i386-sequent-ptx2\n"); exit (0);
+  }
+  if (strncmp(un.version, "V1", 2) == 0) { /* XXX is V1 correct? */
+    printf ("i386-sequent-ptx1\n"); exit (0);
+  }
+  printf ("i386-sequent-ptx\n"); exit (0);
+#endif
+
+#if defined (vax)
+#if !defined (ultrix)
+#include <sys/param.h>
+#if defined (BSD)
+#if BSD == 43
+  printf ("vax-dec-bsd4.3\n"); exit (0);
+#else
+#if BSD == 199006
+  printf ("vax-dec-bsd4.3reno\n"); exit (0);
+#else
+  printf ("vax-dec-bsd\n"); exit (0);
+#endif
+#endif
+#else
+  printf ("vax-dec-bsd\n"); exit (0);
+#endif
+#else
+#if defined(_SIZE_T_) || defined(SIGLOST)
+  struct utsname un;
+  uname (&un);
+  printf ("vax-dec-ultrix%s\n", un.release); exit (0);
+#else
+  printf ("vax-dec-ultrix\n"); exit (0);
+#endif
+#endif
+#endif
+#if defined(ultrix) || defined(_ultrix) || defined(__ultrix) || defined(__ultrix__)
+#if defined(mips) || defined(__mips) || defined(__mips__) || defined(MIPS) || defined(__MIPS__)
+#if defined(_SIZE_T_) || defined(SIGLOST)
+  struct utsname *un;
+  uname (&un);
+  printf ("mips-dec-ultrix%s\n", un.release); exit (0);
+#else
+  printf ("mips-dec-ultrix\n"); exit (0);
+#endif
+#endif
+#endif
+
+#if defined (alliant) && defined (i860)
+  printf ("i860-alliant-bsd\n"); exit (0);
+#endif
+
+  exit (1);
+}
+EOF
+
+$CC_FOR_BUILD -o "$dummy" "$dummy.c" 2>/dev/null && SYSTEM_NAME=`"$dummy"` &&
+	{ echo "$SYSTEM_NAME"; exit; }
+
+# Apollos put the system type in the environment.
+test -d /usr/apollo && { echo "$ISP-apollo-$SYSTYPE"; exit; }
+
+echo "$0: unable to guess system type" >&2
+
+case $UNAME_MACHINE:$UNAME_SYSTEM in
+    mips:Linux | mips64:Linux)
+	# If we got here on MIPS GNU/Linux, output extra information.
+	cat >&2 <<EOF
+
+NOTE: MIPS GNU/Linux systems require a C compiler to fully recognize
+the system type. Please install a C compiler and try again.
+EOF
+	;;
+esac
+
+cat >&2 <<EOF
+
+This script (version $timestamp), has failed to recognize the
+operating system you are using. If your script is old, overwrite *all*
+copies of config.guess and config.sub with the latest versions from:
+
+  https://git.savannah.gnu.org/cgit/config.git/plain/config.guess
+and
+  https://git.savannah.gnu.org/cgit/config.git/plain/config.sub
+EOF
+
+our_year=`echo $timestamp | sed 's,-.*,,'`
+thisyear=`date +%Y`
+# shellcheck disable=SC2003
+script_age=`expr "$thisyear" - "$our_year"`
+if test "$script_age" -lt 3 ; then
+   cat >&2 <<EOF
+
+If $0 has already been updated, send the following data and any
+information you think might be pertinent to config-patches@gnu.org to
+provide the necessary information to handle your system.
+
+config.guess timestamp = $timestamp
+
+uname -m = `(uname -m) 2>/dev/null || echo unknown`
+uname -r = `(uname -r) 2>/dev/null || echo unknown`
+uname -s = `(uname -s) 2>/dev/null || echo unknown`
+uname -v = `(uname -v) 2>/dev/null || echo unknown`
+
+/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null`
+/bin/uname -X     = `(/bin/uname -X) 2>/dev/null`
+
+hostinfo               = `(hostinfo) 2>/dev/null`
+/bin/universe          = `(/bin/universe) 2>/dev/null`
+/usr/bin/arch -k       = `(/usr/bin/arch -k) 2>/dev/null`
+/bin/arch              = `(/bin/arch) 2>/dev/null`
+/usr/bin/oslevel       = `(/usr/bin/oslevel) 2>/dev/null`
+/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null`
+
+UNAME_MACHINE = "$UNAME_MACHINE"
+UNAME_RELEASE = "$UNAME_RELEASE"
+UNAME_SYSTEM  = "$UNAME_SYSTEM"
+UNAME_VERSION = "$UNAME_VERSION"
+EOF
+fi
+
+exit 1
+
+# Local variables:
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-start: "timestamp='"
+# time-stamp-format: "%:y-%02m-%02d"
+# time-stamp-end: "'"
+# End:
diff --git a/src/grep/build-aux/config.rpath b/src/grep/build-aux/config.rpath
new file mode 100755
index 0000000..4b7dc49
--- /dev/null
+++ b/src/grep/build-aux/config.rpath
@@ -0,0 +1,684 @@
+#! /bin/sh
+# Output a system dependent set of variables, describing how to set the
+# run time search path of shared libraries in an executable.
+#
+#   Copyright 1996-2021 Free Software Foundation, Inc.
+#   Taken from GNU libtool, 2001
+#   Originally by Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
+#
+#   This file is free software; the Free Software Foundation gives
+#   unlimited permission to copy and/or distribute it, with or without
+#   modifications, as long as this notice is preserved.
+#
+# The first argument passed to this file is the canonical host specification,
+#    CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM
+# or
+#    CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM
+# The environment variables CC, GCC, LDFLAGS, LD, with_gnu_ld
+# should be set by the caller.
+#
+# The set of defined variables is at the end of this script.
+
+# Known limitations:
+# - On IRIX 6.5 with CC="cc", the run time search patch must not be longer
+#   than 256 bytes, otherwise the compiler driver will dump core. The only
+#   known workaround is to choose shorter directory names for the build
+#   directory and/or the installation directory.
+
+# All known linkers require a '.a' archive for static linking (except MSVC,
+# which needs '.lib').
+libext=a
+shrext=.so
+
+host="$1"
+host_cpu=`echo "$host" | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\1/'`
+host_vendor=`echo "$host" | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\2/'`
+host_os=`echo "$host" | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
+
+# Code taken from libtool.m4's _LT_CC_BASENAME.
+
+for cc_temp in $CC""; do
+  case $cc_temp in
+    compile | *[\\/]compile | ccache | *[\\/]ccache ) ;;
+    distcc | *[\\/]distcc | purify | *[\\/]purify ) ;;
+    \-*) ;;
+    *) break;;
+  esac
+done
+cc_basename=`echo "$cc_temp" | sed -e 's%^.*/%%'`
+
+# Code taken from libtool.m4's _LT_COMPILER_PIC.
+
+wl=
+if test "$GCC" = yes; then
+  wl='-Wl,'
+else
+  case "$host_os" in
+    aix*)
+      wl='-Wl,'
+      ;;
+    mingw* | cygwin* | pw32* | os2* | cegcc*)
+      ;;
+    hpux9* | hpux10* | hpux11*)
+      wl='-Wl,'
+      ;;
+    irix5* | irix6* | nonstopux*)
+      wl='-Wl,'
+      ;;
+    linux* | k*bsd*-gnu | kopensolaris*-gnu)
+      case $cc_basename in
+        ecc*)
+          wl='-Wl,'
+          ;;
+        icc* | ifort*)
+          wl='-Wl,'
+          ;;
+        lf95*)
+          wl='-Wl,'
+          ;;
+        nagfor*)
+          wl='-Wl,-Wl,,'
+          ;;
+        pgcc* | pgf77* | pgf90* | pgf95* | pgfortran*)
+          wl='-Wl,'
+          ;;
+        ccc*)
+          wl='-Wl,'
+          ;;
+        xl* | bgxl* | bgf* | mpixl*)
+          wl='-Wl,'
+          ;;
+        como)
+          wl='-lopt='
+          ;;
+        *)
+          case `$CC -V 2>&1 | sed 5q` in
+            *Sun\ F* | *Sun*Fortran*)
+              wl=
+              ;;
+            *Sun\ C*)
+              wl='-Wl,'
+              ;;
+          esac
+          ;;
+      esac
+      ;;
+    newsos6)
+      ;;
+    *nto* | *qnx*)
+      ;;
+    osf3* | osf4* | osf5*)
+      wl='-Wl,'
+      ;;
+    rdos*)
+      ;;
+    solaris*)
+      case $cc_basename in
+        f77* | f90* | f95* | sunf77* | sunf90* | sunf95*)
+          wl='-Qoption ld '
+          ;;
+        *)
+          wl='-Wl,'
+          ;;
+      esac
+      ;;
+    sunos4*)
+      wl='-Qoption ld '
+      ;;
+    sysv4 | sysv4.2uw2* | sysv4.3*)
+      wl='-Wl,'
+      ;;
+    sysv4*MP*)
+      ;;
+    sysv5* | unixware* | sco3.2v5* | sco5v6* | OpenUNIX*)
+      wl='-Wl,'
+      ;;
+    unicos*)
+      wl='-Wl,'
+      ;;
+    uts4*)
+      ;;
+  esac
+fi
+
+# Code taken from libtool.m4's _LT_LINKER_SHLIBS.
+
+hardcode_libdir_flag_spec=
+hardcode_libdir_separator=
+hardcode_direct=no
+hardcode_minus_L=no
+
+case "$host_os" in
+  cygwin* | mingw* | pw32* | cegcc*)
+    # FIXME: the MSVC++ port hasn't been tested in a loooong time
+    # When not using gcc, we currently assume that we are using
+    # Microsoft Visual C++.
+    if test "$GCC" != yes; then
+      with_gnu_ld=no
+    fi
+    ;;
+  interix*)
+    # we just hope/assume this is gcc and not c89 (= MSVC++)
+    with_gnu_ld=yes
+    ;;
+  openbsd*)
+    with_gnu_ld=no
+    ;;
+esac
+
+ld_shlibs=yes
+if test "$with_gnu_ld" = yes; then
+  # Set some defaults for GNU ld with shared library support. These
+  # are reset later if shared libraries are not supported. Putting them
+  # here allows them to be overridden if necessary.
+  # Unlike libtool, we use -rpath here, not --rpath, since the documented
+  # option of GNU ld is called -rpath, not --rpath.
+  hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
+  case "$host_os" in
+    aix[3-9]*)
+      # On AIX/PPC, the GNU linker is very broken
+      if test "$host_cpu" != ia64; then
+        ld_shlibs=no
+      fi
+      ;;
+    amigaos*)
+      case "$host_cpu" in
+        powerpc)
+          ;;
+        m68k)
+          hardcode_libdir_flag_spec='-L$libdir'
+          hardcode_minus_L=yes
+          ;;
+      esac
+      ;;
+    beos*)
+      if $LD --help 2>&1 | grep ': supported targets:.* elf' > /dev/null; then
+        :
+      else
+        ld_shlibs=no
+      fi
+      ;;
+    cygwin* | mingw* | pw32* | cegcc*)
+      # hardcode_libdir_flag_spec is actually meaningless, as there is
+      # no search path for DLLs.
+      hardcode_libdir_flag_spec='-L$libdir'
+      if $LD --help 2>&1 | grep 'auto-import' > /dev/null; then
+        :
+      else
+        ld_shlibs=no
+      fi
+      ;;
+    haiku*)
+      ;;
+    interix[3-9]*)
+      hardcode_direct=no
+      hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
+      ;;
+    gnu* | linux* | tpf* | k*bsd*-gnu | kopensolaris*-gnu)
+      if $LD --help 2>&1 | grep ': supported targets:.* elf' > /dev/null; then
+        :
+      else
+        ld_shlibs=no
+      fi
+      ;;
+    netbsd*)
+      ;;
+    solaris*)
+      if $LD -v 2>&1 | grep 'BFD 2\.8' > /dev/null; then
+        ld_shlibs=no
+      elif $LD --help 2>&1 | grep ': supported targets:.* elf' > /dev/null; then
+        :
+      else
+        ld_shlibs=no
+      fi
+      ;;
+    sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX*)
+      case `$LD -v 2>&1` in
+        *\ [01].* | *\ 2.[0-9].* | *\ 2.1[0-5].*)
+          ld_shlibs=no
+          ;;
+        *)
+          if $LD --help 2>&1 | grep ': supported targets:.* elf' > /dev/null; then
+            hardcode_libdir_flag_spec='`test -z "$SCOABSPATH" && echo ${wl}-rpath,$libdir`'
+          else
+            ld_shlibs=no
+          fi
+          ;;
+      esac
+      ;;
+    sunos4*)
+      hardcode_direct=yes
+      ;;
+    *)
+      if $LD --help 2>&1 | grep ': supported targets:.* elf' > /dev/null; then
+        :
+      else
+        ld_shlibs=no
+      fi
+      ;;
+  esac
+  if test "$ld_shlibs" = no; then
+    hardcode_libdir_flag_spec=
+  fi
+else
+  case "$host_os" in
+    aix3*)
+      # Note: this linker hardcodes the directories in LIBPATH if there
+      # are no directories specified by -L.
+      hardcode_minus_L=yes
+      if test "$GCC" = yes; then
+        # Neither direct hardcoding nor static linking is supported with a
+        # broken collect2.
+        hardcode_direct=unsupported
+      fi
+      ;;
+    aix[4-9]*)
+      if test "$host_cpu" = ia64; then
+        # On IA64, the linker does run time linking by default, so we don't
+        # have to do anything special.
+        aix_use_runtimelinking=no
+      else
+        aix_use_runtimelinking=no
+        # Test if we are trying to use run time linking or normal
+        # AIX style linking. If -brtl is somewhere in LDFLAGS, we
+        # need to do runtime linking.
+        case $host_os in aix4.[23]|aix4.[23].*|aix[5-9]*)
+          for ld_flag in $LDFLAGS; do
+            if (test $ld_flag = "-brtl" || test $ld_flag = "-Wl,-brtl"); then
+              aix_use_runtimelinking=yes
+              break
+            fi
+          done
+          ;;
+        esac
+      fi
+      hardcode_direct=yes
+      hardcode_libdir_separator=':'
+      if test "$GCC" = yes; then
+        case $host_os in aix4.[012]|aix4.[012].*)
+          collect2name=`${CC} -print-prog-name=collect2`
+          if test -f "$collect2name" && \
+            strings "$collect2name" | grep resolve_lib_name >/dev/null
+          then
+            # We have reworked collect2
+            :
+          else
+            # We have old collect2
+            hardcode_direct=unsupported
+            hardcode_minus_L=yes
+            hardcode_libdir_flag_spec='-L$libdir'
+            hardcode_libdir_separator=
+          fi
+          ;;
+        esac
+      fi
+      # Begin _LT_AC_SYS_LIBPATH_AIX.
+      echo 'int main () { return 0; }' > conftest.c
+      ${CC} ${LDFLAGS} conftest.c -o conftest
+      aix_libpath=`dump -H conftest 2>/dev/null | sed -n -e '/Import File Strings/,/^$/ { /^0/ { s/^0  *\(.*\)$/\1/; p; }
+}'`
+      if test -z "$aix_libpath"; then
+        aix_libpath=`dump -HX64 conftest 2>/dev/null | sed -n -e '/Import File Strings/,/^$/ { /^0/ { s/^0  *\(.*\)$/\1/; p; }
+}'`
+      fi
+      if test -z "$aix_libpath"; then
+        aix_libpath="/usr/lib:/lib"
+      fi
+      rm -f conftest.c conftest
+      # End _LT_AC_SYS_LIBPATH_AIX.
+      if test "$aix_use_runtimelinking" = yes; then
+        hardcode_libdir_flag_spec='${wl}-blibpath:$libdir:'"$aix_libpath"
+      else
+        if test "$host_cpu" = ia64; then
+          hardcode_libdir_flag_spec='${wl}-R $libdir:/usr/lib:/lib'
+        else
+          hardcode_libdir_flag_spec='${wl}-blibpath:$libdir:'"$aix_libpath"
+        fi
+      fi
+      ;;
+    amigaos*)
+      case "$host_cpu" in
+        powerpc)
+          ;;
+        m68k)
+          hardcode_libdir_flag_spec='-L$libdir'
+          hardcode_minus_L=yes
+          ;;
+      esac
+      ;;
+    bsdi[45]*)
+      ;;
+    cygwin* | mingw* | pw32* | cegcc*)
+      # When not using gcc, we currently assume that we are using
+      # Microsoft Visual C++.
+      # hardcode_libdir_flag_spec is actually meaningless, as there is
+      # no search path for DLLs.
+      hardcode_libdir_flag_spec=' '
+      libext=lib
+      ;;
+    darwin* | rhapsody*)
+      hardcode_direct=no
+      if { case $cc_basename in ifort*) true;; *) test "$GCC" = yes;; esac; }; then
+        :
+      else
+        ld_shlibs=no
+      fi
+      ;;
+    dgux*)
+      hardcode_libdir_flag_spec='-L$libdir'
+      ;;
+    freebsd2.[01]*)
+      hardcode_direct=yes
+      hardcode_minus_L=yes
+      ;;
+    freebsd* | dragonfly* | midnightbsd*)
+      hardcode_libdir_flag_spec='-R$libdir'
+      hardcode_direct=yes
+      ;;
+    hpux9*)
+      hardcode_libdir_flag_spec='${wl}+b ${wl}$libdir'
+      hardcode_libdir_separator=:
+      hardcode_direct=yes
+      # hardcode_minus_L: Not really in the search PATH,
+      # but as the default location of the library.
+      hardcode_minus_L=yes
+      ;;
+    hpux10*)
+      if test "$with_gnu_ld" = no; then
+        hardcode_libdir_flag_spec='${wl}+b ${wl}$libdir'
+        hardcode_libdir_separator=:
+        hardcode_direct=yes
+        # hardcode_minus_L: Not really in the search PATH,
+        # but as the default location of the library.
+        hardcode_minus_L=yes
+      fi
+      ;;
+    hpux11*)
+      if test "$with_gnu_ld" = no; then
+        hardcode_libdir_flag_spec='${wl}+b ${wl}$libdir'
+        hardcode_libdir_separator=:
+        case $host_cpu in
+          hppa*64*|ia64*)
+            hardcode_direct=no
+            ;;
+          *)
+            hardcode_direct=yes
+            # hardcode_minus_L: Not really in the search PATH,
+            # but as the default location of the library.
+            hardcode_minus_L=yes
+            ;;
+        esac
+      fi
+      ;;
+    irix5* | irix6* | nonstopux*)
+      hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
+      hardcode_libdir_separator=:
+      ;;
+    netbsd*)
+      hardcode_libdir_flag_spec='-R$libdir'
+      hardcode_direct=yes
+      ;;
+    newsos6)
+      hardcode_direct=yes
+      hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
+      hardcode_libdir_separator=:
+      ;;
+    *nto* | *qnx*)
+      ;;
+    openbsd*)
+      if test -f /usr/libexec/ld.so; then
+        hardcode_direct=yes
+        if test -z "`echo __ELF__ | $CC -E - | grep __ELF__`" || test "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then
+          hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
+        else
+          case "$host_os" in
+            openbsd[01].* | openbsd2.[0-7] | openbsd2.[0-7].*)
+              hardcode_libdir_flag_spec='-R$libdir'
+              ;;
+            *)
+              hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
+              ;;
+          esac
+        fi
+      else
+        ld_shlibs=no
+      fi
+      ;;
+    os2*)
+      hardcode_libdir_flag_spec='-L$libdir'
+      hardcode_minus_L=yes
+      ;;
+    osf3*)
+      hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
+      hardcode_libdir_separator=:
+      ;;
+    osf4* | osf5*)
+      if test "$GCC" = yes; then
+        hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
+      else
+        # Both cc and cxx compiler support -rpath directly
+        hardcode_libdir_flag_spec='-rpath $libdir'
+      fi
+      hardcode_libdir_separator=:
+      ;;
+    solaris*)
+      hardcode_libdir_flag_spec='-R$libdir'
+      ;;
+    sunos4*)
+      hardcode_libdir_flag_spec='-L$libdir'
+      hardcode_direct=yes
+      hardcode_minus_L=yes
+      ;;
+    sysv4)
+      case $host_vendor in
+        sni)
+          hardcode_direct=yes # is this really true???
+          ;;
+        siemens)
+          hardcode_direct=no
+          ;;
+        motorola)
+          hardcode_direct=no #Motorola manual says yes, but my tests say they lie
+          ;;
+      esac
+      ;;
+    sysv4.3*)
+      ;;
+    sysv4*MP*)
+      if test -d /usr/nec; then
+        ld_shlibs=yes
+      fi
+      ;;
+    sysv4*uw2* | sysv5OpenUNIX* | sysv5UnixWare7.[01].[10]* | unixware7* | sco3.2v5.0.[024]*)
+      ;;
+    sysv5* | sco3.2v5* | sco5v6*)
+      hardcode_libdir_flag_spec='`test -z "$SCOABSPATH" && echo ${wl}-R,$libdir`'
+      hardcode_libdir_separator=':'
+      ;;
+    uts4*)
+      hardcode_libdir_flag_spec='-L$libdir'
+      ;;
+    *)
+      ld_shlibs=no
+      ;;
+  esac
+fi
+
+# Check dynamic linker characteristics
+# Code taken from libtool.m4's _LT_SYS_DYNAMIC_LINKER.
+# Unlike libtool.m4, here we don't care about _all_ names of the library, but
+# only about the one the linker finds when passed -lNAME. This is the last
+# element of library_names_spec in libtool.m4, or possibly two of them if the
+# linker has special search rules.
+library_names_spec=      # the last element of library_names_spec in libtool.m4
+libname_spec='lib$name'
+case "$host_os" in
+  aix3*)
+    library_names_spec='$libname.a'
+    ;;
+  aix[4-9]*)
+    library_names_spec='$libname$shrext'
+    ;;
+  amigaos*)
+    case "$host_cpu" in
+      powerpc*)
+        library_names_spec='$libname$shrext' ;;
+      m68k)
+        library_names_spec='$libname.a' ;;
+    esac
+    ;;
+  beos*)
+    library_names_spec='$libname$shrext'
+    ;;
+  bsdi[45]*)
+    library_names_spec='$libname$shrext'
+    ;;
+  cygwin* | mingw* | pw32* | cegcc*)
+    shrext=.dll
+    library_names_spec='$libname.dll.a $libname.lib'
+    ;;
+  darwin* | rhapsody*)
+    shrext=.dylib
+    library_names_spec='$libname$shrext'
+    ;;
+  dgux*)
+    library_names_spec='$libname$shrext'
+    ;;
+  freebsd[23].*)
+    library_names_spec='$libname$shrext$versuffix'
+    ;;
+  freebsd* | dragonfly* | midnightbsd*)
+    library_names_spec='$libname$shrext'
+    ;;
+  gnu*)
+    library_names_spec='$libname$shrext'
+    ;;
+  haiku*)
+    library_names_spec='$libname$shrext'
+    ;;
+  hpux9* | hpux10* | hpux11*)
+    case $host_cpu in
+      ia64*)
+        shrext=.so
+        ;;
+      hppa*64*)
+        shrext=.sl
+        ;;
+      *)
+        shrext=.sl
+        ;;
+    esac
+    library_names_spec='$libname$shrext'
+    ;;
+  interix[3-9]*)
+    library_names_spec='$libname$shrext'
+    ;;
+  irix5* | irix6* | nonstopux*)
+    library_names_spec='$libname$shrext'
+    case "$host_os" in
+      irix5* | nonstopux*)
+        libsuff= shlibsuff=
+        ;;
+      *)
+        case $LD in
+          *-32|*"-32 "|*-melf32bsmip|*"-melf32bsmip ") libsuff= shlibsuff= ;;
+          *-n32|*"-n32 "|*-melf32bmipn32|*"-melf32bmipn32 ") libsuff=32 shlibsuff=N32 ;;
+          *-64|*"-64 "|*-melf64bmip|*"-melf64bmip ") libsuff=64 shlibsuff=64 ;;
+          *) libsuff= shlibsuff= ;;
+        esac
+        ;;
+    esac
+    ;;
+  linux*oldld* | linux*aout* | linux*coff*)
+    ;;
+  linux* | k*bsd*-gnu | kopensolaris*-gnu)
+    library_names_spec='$libname$shrext'
+    ;;
+  knetbsd*-gnu)
+    library_names_spec='$libname$shrext'
+    ;;
+  netbsd*)
+    library_names_spec='$libname$shrext'
+    ;;
+  newsos6)
+    library_names_spec='$libname$shrext'
+    ;;
+  *nto* | *qnx*)
+    library_names_spec='$libname$shrext'
+    ;;
+  openbsd*)
+    library_names_spec='$libname$shrext$versuffix'
+    ;;
+  os2*)
+    libname_spec='$name'
+    shrext=.dll
+    library_names_spec='$libname.a'
+    ;;
+  osf3* | osf4* | osf5*)
+    library_names_spec='$libname$shrext'
+    ;;
+  rdos*)
+    ;;
+  solaris*)
+    library_names_spec='$libname$shrext'
+    ;;
+  sunos4*)
+    library_names_spec='$libname$shrext$versuffix'
+    ;;
+  sysv4 | sysv4.3*)
+    library_names_spec='$libname$shrext'
+    ;;
+  sysv4*MP*)
+    library_names_spec='$libname$shrext'
+    ;;
+  sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*)
+    library_names_spec='$libname$shrext'
+    ;;
+  tpf*)
+    library_names_spec='$libname$shrext'
+    ;;
+  uts4*)
+    library_names_spec='$libname$shrext'
+    ;;
+esac
+
+sed_quote_subst='s/\(["`$\\]\)/\\\1/g'
+escaped_wl=`echo "X$wl" | sed -e 's/^X//' -e "$sed_quote_subst"`
+shlibext=`echo "$shrext" | sed -e 's,^\.,,'`
+escaped_libname_spec=`echo "X$libname_spec" | sed -e 's/^X//' -e "$sed_quote_subst"`
+escaped_library_names_spec=`echo "X$library_names_spec" | sed -e 's/^X//' -e "$sed_quote_subst"`
+escaped_hardcode_libdir_flag_spec=`echo "X$hardcode_libdir_flag_spec" | sed -e 's/^X//' -e "$sed_quote_subst"`
+
+LC_ALL=C sed -e 's/^\([a-zA-Z0-9_]*\)=/acl_cv_\1=/' <<EOF
+
+# How to pass a linker flag through the compiler.
+wl="$escaped_wl"
+
+# Static library suffix (normally "a").
+libext="$libext"
+
+# Shared library suffix (normally "so").
+shlibext="$shlibext"
+
+# Format of library name prefix.
+libname_spec="$escaped_libname_spec"
+
+# Library names that the linker finds when passed -lNAME.
+library_names_spec="$escaped_library_names_spec"
+
+# Flag to hardcode \$libdir into a binary during linking.
+# This must work even if \$libdir does not exist.
+hardcode_libdir_flag_spec="$escaped_hardcode_libdir_flag_spec"
+
+# Whether we need a single -rpath flag with a separated argument.
+hardcode_libdir_separator="$hardcode_libdir_separator"
+
+# Set to yes if using DIR/libNAME.so during linking hardcodes DIR into the
+# resulting binary.
+hardcode_direct="$hardcode_direct"
+
+# Set to yes if using the -LDIR flag during linking hardcodes DIR into the
+# resulting binary.
+hardcode_minus_L="$hardcode_minus_L"
+
+EOF
diff --git a/src/grep/build-aux/config.sub b/src/grep/build-aux/config.sub
new file mode 100755
index 0000000..d80c5d7
--- /dev/null
+++ b/src/grep/build-aux/config.sub
@@ -0,0 +1,1873 @@
+#! /bin/sh
+# Configuration validation subroutine script.
+#   Copyright 1992-2021 Free Software Foundation, Inc.
+
+# shellcheck disable=SC2006,SC2268 # see below for rationale
+
+timestamp='2021-07-03'
+
+# This file is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, see <https://www.gnu.org/licenses/>.
+#
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that
+# program.  This Exception is an additional permission under section 7
+# of the GNU General Public License, version 3 ("GPLv3").
+
+
+# Please send patches to <config-patches@gnu.org>.
+#
+# Configuration subroutine to validate and canonicalize a configuration type.
+# Supply the specified configuration type as an argument.
+# If it is invalid, we print an error message on stderr and exit with code 1.
+# Otherwise, we print the canonical config type on stdout and succeed.
+
+# You can get the latest version of this script from:
+# https://git.savannah.gnu.org/cgit/config.git/plain/config.sub
+
+# This file is supposed to be the same for all GNU packages
+# and recognize all the CPU types, system types and aliases
+# that are meaningful with *any* GNU software.
+# Each package is responsible for reporting which valid configurations
+# it does not support.  The user should be able to distinguish
+# a failure to support a valid configuration from a meaningless
+# configuration.
+
+# The goal of this file is to map all the various variations of a given
+# machine specification into a single specification in the form:
+#	CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM
+# or in some cases, the newer four-part form:
+#	CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM
+# It is wrong to echo any other type of specification.
+
+# The "shellcheck disable" line above the timestamp inhibits complaints
+# about features and limitations of the classic Bourne shell that were
+# superseded or lifted in POSIX.  However, this script identifies a wide
+# variety of pre-POSIX systems that do not have POSIX shells at all, and
+# even some reasonably current systems (Solaris 10 as case-in-point) still
+# have a pre-POSIX /bin/sh.
+
+me=`echo "$0" | sed -e 's,.*/,,'`
+
+usage="\
+Usage: $0 [OPTION] CPU-MFR-OPSYS or ALIAS
+
+Canonicalize a configuration name.
+
+Options:
+  -h, --help         print this help, then exit
+  -t, --time-stamp   print date of last modification, then exit
+  -v, --version      print version number, then exit
+
+Report bugs and patches to <config-patches@gnu.org>."
+
+version="\
+GNU config.sub ($timestamp)
+
+Copyright 1992-2021 Free Software Foundation, Inc.
+
+This is free software; see the source for copying conditions.  There is NO
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
+
+help="
+Try \`$me --help' for more information."
+
+# Parse command line
+while test $# -gt 0 ; do
+  case $1 in
+    --time-stamp | --time* | -t )
+       echo "$timestamp" ; exit ;;
+    --version | -v )
+       echo "$version" ; exit ;;
+    --help | --h* | -h )
+       echo "$usage"; exit ;;
+    -- )     # Stop option processing
+       shift; break ;;
+    - )	# Use stdin as input.
+       break ;;
+    -* )
+       echo "$me: invalid option $1$help" >&2
+       exit 1 ;;
+
+    *local*)
+       # First pass through any local machine types.
+       echo "$1"
+       exit ;;
+
+    * )
+       break ;;
+  esac
+done
+
+case $# in
+ 0) echo "$me: missing argument$help" >&2
+    exit 1;;
+ 1) ;;
+ *) echo "$me: too many arguments$help" >&2
+    exit 1;;
+esac
+
+# Split fields of configuration type
+# shellcheck disable=SC2162
+IFS="-" read field1 field2 field3 field4 <<EOF
+$1
+EOF
+
+# Separate into logical components for further validation
+case $1 in
+	*-*-*-*-*)
+		echo Invalid configuration \`"$1"\': more than four components >&2
+		exit 1
+		;;
+	*-*-*-*)
+		basic_machine=$field1-$field2
+		basic_os=$field3-$field4
+		;;
+	*-*-*)
+		# Ambiguous whether COMPANY is present, or skipped and KERNEL-OS is two
+		# parts
+		maybe_os=$field2-$field3
+		case $maybe_os in
+			nto-qnx* | linux-* | uclinux-uclibc* \
+			| uclinux-gnu* | kfreebsd*-gnu* | knetbsd*-gnu* | netbsd*-gnu* \
+			| netbsd*-eabi* | kopensolaris*-gnu* | cloudabi*-eabi* \
+			| storm-chaos* | os2-emx* | rtmk-nova*)
+				basic_machine=$field1
+				basic_os=$maybe_os
+				;;
+			android-linux)
+				basic_machine=$field1-unknown
+				basic_os=linux-android
+				;;
+			*)
+				basic_machine=$field1-$field2
+				basic_os=$field3
+				;;
+		esac
+		;;
+	*-*)
+		# A lone config we happen to match not fitting any pattern
+		case $field1-$field2 in
+			decstation-3100)
+				basic_machine=mips-dec
+				basic_os=
+				;;
+			*-*)
+				# Second component is usually, but not always the OS
+				case $field2 in
+					# Prevent following clause from handling this valid os
+					sun*os*)
+						basic_machine=$field1
+						basic_os=$field2
+						;;
+					# Manufacturers
+					dec* | mips* | sequent* | encore* | pc533* | sgi* | sony* \
+					| att* | 7300* | 3300* | delta* | motorola* | sun[234]* \
+					| unicom* | ibm* | next | hp | isi* | apollo | altos* \
+					| convergent* | ncr* | news | 32* | 3600* | 3100* \
+					| hitachi* | c[123]* | convex* | sun | crds | omron* | dg \
+					| ultra | tti* | harris | dolphin | highlevel | gould \
+					| cbm | ns | masscomp | apple | axis | knuth | cray \
+					| microblaze* | sim | cisco \
+					| oki | wec | wrs | winbond)
+						basic_machine=$field1-$field2
+						basic_os=
+						;;
+					*)
+						basic_machine=$field1
+						basic_os=$field2
+						;;
+				esac
+			;;
+		esac
+		;;
+	*)
+		# Convert single-component short-hands not valid as part of
+		# multi-component configurations.
+		case $field1 in
+			386bsd)
+				basic_machine=i386-pc
+				basic_os=bsd
+				;;
+			a29khif)
+				basic_machine=a29k-amd
+				basic_os=udi
+				;;
+			adobe68k)
+				basic_machine=m68010-adobe
+				basic_os=scout
+				;;
+			alliant)
+				basic_machine=fx80-alliant
+				basic_os=
+				;;
+			altos | altos3068)
+				basic_machine=m68k-altos
+				basic_os=
+				;;
+			am29k)
+				basic_machine=a29k-none
+				basic_os=bsd
+				;;
+			amdahl)
+				basic_machine=580-amdahl
+				basic_os=sysv
+				;;
+			amiga)
+				basic_machine=m68k-unknown
+				basic_os=
+				;;
+			amigaos | amigados)
+				basic_machine=m68k-unknown
+				basic_os=amigaos
+				;;
+			amigaunix | amix)
+				basic_machine=m68k-unknown
+				basic_os=sysv4
+				;;
+			apollo68)
+				basic_machine=m68k-apollo
+				basic_os=sysv
+				;;
+			apollo68bsd)
+				basic_machine=m68k-apollo
+				basic_os=bsd
+				;;
+			aros)
+				basic_machine=i386-pc
+				basic_os=aros
+				;;
+			aux)
+				basic_machine=m68k-apple
+				basic_os=aux
+				;;
+			balance)
+				basic_machine=ns32k-sequent
+				basic_os=dynix
+				;;
+			blackfin)
+				basic_machine=bfin-unknown
+				basic_os=linux
+				;;
+			cegcc)
+				basic_machine=arm-unknown
+				basic_os=cegcc
+				;;
+			convex-c1)
+				basic_machine=c1-convex
+				basic_os=bsd
+				;;
+			convex-c2)
+				basic_machine=c2-convex
+				basic_os=bsd
+				;;
+			convex-c32)
+				basic_machine=c32-convex
+				basic_os=bsd
+				;;
+			convex-c34)
+				basic_machine=c34-convex
+				basic_os=bsd
+				;;
+			convex-c38)
+				basic_machine=c38-convex
+				basic_os=bsd
+				;;
+			cray)
+				basic_machine=j90-cray
+				basic_os=unicos
+				;;
+			crds | unos)
+				basic_machine=m68k-crds
+				basic_os=
+				;;
+			da30)
+				basic_machine=m68k-da30
+				basic_os=
+				;;
+			decstation | pmax | pmin | dec3100 | decstatn)
+				basic_machine=mips-dec
+				basic_os=
+				;;
+			delta88)
+				basic_machine=m88k-motorola
+				basic_os=sysv3
+				;;
+			dicos)
+				basic_machine=i686-pc
+				basic_os=dicos
+				;;
+			djgpp)
+				basic_machine=i586-pc
+				basic_os=msdosdjgpp
+				;;
+			ebmon29k)
+				basic_machine=a29k-amd
+				basic_os=ebmon
+				;;
+			es1800 | OSE68k | ose68k | ose | OSE)
+				basic_machine=m68k-ericsson
+				basic_os=ose
+				;;
+			gmicro)
+				basic_machine=tron-gmicro
+				basic_os=sysv
+				;;
+			go32)
+				basic_machine=i386-pc
+				basic_os=go32
+				;;
+			h8300hms)
+				basic_machine=h8300-hitachi
+				basic_os=hms
+				;;
+			h8300xray)
+				basic_machine=h8300-hitachi
+				basic_os=xray
+				;;
+			h8500hms)
+				basic_machine=h8500-hitachi
+				basic_os=hms
+				;;
+			harris)
+				basic_machine=m88k-harris
+				basic_os=sysv3
+				;;
+			hp300 | hp300hpux)
+				basic_machine=m68k-hp
+				basic_os=hpux
+				;;
+			hp300bsd)
+				basic_machine=m68k-hp
+				basic_os=bsd
+				;;
+			hppaosf)
+				basic_machine=hppa1.1-hp
+				basic_os=osf
+				;;
+			hppro)
+				basic_machine=hppa1.1-hp
+				basic_os=proelf
+				;;
+			i386mach)
+				basic_machine=i386-mach
+				basic_os=mach
+				;;
+			isi68 | isi)
+				basic_machine=m68k-isi
+				basic_os=sysv
+				;;
+			m68knommu)
+				basic_machine=m68k-unknown
+				basic_os=linux
+				;;
+			magnum | m3230)
+				basic_machine=mips-mips
+				basic_os=sysv
+				;;
+			merlin)
+				basic_machine=ns32k-utek
+				basic_os=sysv
+				;;
+			mingw64)
+				basic_machine=x86_64-pc
+				basic_os=mingw64
+				;;
+			mingw32)
+				basic_machine=i686-pc
+				basic_os=mingw32
+				;;
+			mingw32ce)
+				basic_machine=arm-unknown
+				basic_os=mingw32ce
+				;;
+			monitor)
+				basic_machine=m68k-rom68k
+				basic_os=coff
+				;;
+			morphos)
+				basic_machine=powerpc-unknown
+				basic_os=morphos
+				;;
+			moxiebox)
+				basic_machine=moxie-unknown
+				basic_os=moxiebox
+				;;
+			msdos)
+				basic_machine=i386-pc
+				basic_os=msdos
+				;;
+			msys)
+				basic_machine=i686-pc
+				basic_os=msys
+				;;
+			mvs)
+				basic_machine=i370-ibm
+				basic_os=mvs
+				;;
+			nacl)
+				basic_machine=le32-unknown
+				basic_os=nacl
+				;;
+			ncr3000)
+				basic_machine=i486-ncr
+				basic_os=sysv4
+				;;
+			netbsd386)
+				basic_machine=i386-pc
+				basic_os=netbsd
+				;;
+			netwinder)
+				basic_machine=armv4l-rebel
+				basic_os=linux
+				;;
+			news | news700 | news800 | news900)
+				basic_machine=m68k-sony
+				basic_os=newsos
+				;;
+			news1000)
+				basic_machine=m68030-sony
+				basic_os=newsos
+				;;
+			necv70)
+				basic_machine=v70-nec
+				basic_os=sysv
+				;;
+			nh3000)
+				basic_machine=m68k-harris
+				basic_os=cxux
+				;;
+			nh[45]000)
+				basic_machine=m88k-harris
+				basic_os=cxux
+				;;
+			nindy960)
+				basic_machine=i960-intel
+				basic_os=nindy
+				;;
+			mon960)
+				basic_machine=i960-intel
+				basic_os=mon960
+				;;
+			nonstopux)
+				basic_machine=mips-compaq
+				basic_os=nonstopux
+				;;
+			os400)
+				basic_machine=powerpc-ibm
+				basic_os=os400
+				;;
+			OSE68000 | ose68000)
+				basic_machine=m68000-ericsson
+				basic_os=ose
+				;;
+			os68k)
+				basic_machine=m68k-none
+				basic_os=os68k
+				;;
+			paragon)
+				basic_machine=i860-intel
+				basic_os=osf
+				;;
+			parisc)
+				basic_machine=hppa-unknown
+				basic_os=linux
+				;;
+			psp)
+				basic_machine=mipsallegrexel-sony
+				basic_os=psp
+				;;
+			pw32)
+				basic_machine=i586-unknown
+				basic_os=pw32
+				;;
+			rdos | rdos64)
+				basic_machine=x86_64-pc
+				basic_os=rdos
+				;;
+			rdos32)
+				basic_machine=i386-pc
+				basic_os=rdos
+				;;
+			rom68k)
+				basic_machine=m68k-rom68k
+				basic_os=coff
+				;;
+			sa29200)
+				basic_machine=a29k-amd
+				basic_os=udi
+				;;
+			sei)
+				basic_machine=mips-sei
+				basic_os=seiux
+				;;
+			sequent)
+				basic_machine=i386-sequent
+				basic_os=
+				;;
+			sps7)
+				basic_machine=m68k-bull
+				basic_os=sysv2
+				;;
+			st2000)
+				basic_machine=m68k-tandem
+				basic_os=
+				;;
+			stratus)
+				basic_machine=i860-stratus
+				basic_os=sysv4
+				;;
+			sun2)
+				basic_machine=m68000-sun
+				basic_os=
+				;;
+			sun2os3)
+				basic_machine=m68000-sun
+				basic_os=sunos3
+				;;
+			sun2os4)
+				basic_machine=m68000-sun
+				basic_os=sunos4
+				;;
+			sun3)
+				basic_machine=m68k-sun
+				basic_os=
+				;;
+			sun3os3)
+				basic_machine=m68k-sun
+				basic_os=sunos3
+				;;
+			sun3os4)
+				basic_machine=m68k-sun
+				basic_os=sunos4
+				;;
+			sun4)
+				basic_machine=sparc-sun
+				basic_os=
+				;;
+			sun4os3)
+				basic_machine=sparc-sun
+				basic_os=sunos3
+				;;
+			sun4os4)
+				basic_machine=sparc-sun
+				basic_os=sunos4
+				;;
+			sun4sol2)
+				basic_machine=sparc-sun
+				basic_os=solaris2
+				;;
+			sun386 | sun386i | roadrunner)
+				basic_machine=i386-sun
+				basic_os=
+				;;
+			sv1)
+				basic_machine=sv1-cray
+				basic_os=unicos
+				;;
+			symmetry)
+				basic_machine=i386-sequent
+				basic_os=dynix
+				;;
+			t3e)
+				basic_machine=alphaev5-cray
+				basic_os=unicos
+				;;
+			t90)
+				basic_machine=t90-cray
+				basic_os=unicos
+				;;
+			toad1)
+				basic_machine=pdp10-xkl
+				basic_os=tops20
+				;;
+			tpf)
+				basic_machine=s390x-ibm
+				basic_os=tpf
+				;;
+			udi29k)
+				basic_machine=a29k-amd
+				basic_os=udi
+				;;
+			ultra3)
+				basic_machine=a29k-nyu
+				basic_os=sym1
+				;;
+			v810 | necv810)
+				basic_machine=v810-nec
+				basic_os=none
+				;;
+			vaxv)
+				basic_machine=vax-dec
+				basic_os=sysv
+				;;
+			vms)
+				basic_machine=vax-dec
+				basic_os=vms
+				;;
+			vsta)
+				basic_machine=i386-pc
+				basic_os=vsta
+				;;
+			vxworks960)
+				basic_machine=i960-wrs
+				basic_os=vxworks
+				;;
+			vxworks68)
+				basic_machine=m68k-wrs
+				basic_os=vxworks
+				;;
+			vxworks29k)
+				basic_machine=a29k-wrs
+				basic_os=vxworks
+				;;
+			xbox)
+				basic_machine=i686-pc
+				basic_os=mingw32
+				;;
+			ymp)
+				basic_machine=ymp-cray
+				basic_os=unicos
+				;;
+			*)
+				basic_machine=$1
+				basic_os=
+				;;
+		esac
+		;;
+esac
+
+# Decode 1-component or ad-hoc basic machines
+case $basic_machine in
+	# Here we handle the default manufacturer of certain CPU types.  It is in
+	# some cases the only manufacturer, in others, it is the most popular.
+	w89k)
+		cpu=hppa1.1
+		vendor=winbond
+		;;
+	op50n)
+		cpu=hppa1.1
+		vendor=oki
+		;;
+	op60c)
+		cpu=hppa1.1
+		vendor=oki
+		;;
+	ibm*)
+		cpu=i370
+		vendor=ibm
+		;;
+	orion105)
+		cpu=clipper
+		vendor=highlevel
+		;;
+	mac | mpw | mac-mpw)
+		cpu=m68k
+		vendor=apple
+		;;
+	pmac | pmac-mpw)
+		cpu=powerpc
+		vendor=apple
+		;;
+
+	# Recognize the various machine names and aliases which stand
+	# for a CPU type and a company and sometimes even an OS.
+	3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc)
+		cpu=m68000
+		vendor=att
+		;;
+	3b*)
+		cpu=we32k
+		vendor=att
+		;;
+	bluegene*)
+		cpu=powerpc
+		vendor=ibm
+		basic_os=cnk
+		;;
+	decsystem10* | dec10*)
+		cpu=pdp10
+		vendor=dec
+		basic_os=tops10
+		;;
+	decsystem20* | dec20*)
+		cpu=pdp10
+		vendor=dec
+		basic_os=tops20
+		;;
+	delta | 3300 | motorola-3300 | motorola-delta \
+	      | 3300-motorola | delta-motorola)
+		cpu=m68k
+		vendor=motorola
+		;;
+	dpx2*)
+		cpu=m68k
+		vendor=bull
+		basic_os=sysv3
+		;;
+	encore | umax | mmax)
+		cpu=ns32k
+		vendor=encore
+		;;
+	elxsi)
+		cpu=elxsi
+		vendor=elxsi
+		basic_os=${basic_os:-bsd}
+		;;
+	fx2800)
+		cpu=i860
+		vendor=alliant
+		;;
+	genix)
+		cpu=ns32k
+		vendor=ns
+		;;
+	h3050r* | hiux*)
+		cpu=hppa1.1
+		vendor=hitachi
+		basic_os=hiuxwe2
+		;;
+	hp3k9[0-9][0-9] | hp9[0-9][0-9])
+		cpu=hppa1.0
+		vendor=hp
+		;;
+	hp9k2[0-9][0-9] | hp9k31[0-9])
+		cpu=m68000
+		vendor=hp
+		;;
+	hp9k3[2-9][0-9])
+		cpu=m68k
+		vendor=hp
+		;;
+	hp9k6[0-9][0-9] | hp6[0-9][0-9])
+		cpu=hppa1.0
+		vendor=hp
+		;;
+	hp9k7[0-79][0-9] | hp7[0-79][0-9])
+		cpu=hppa1.1
+		vendor=hp
+		;;
+	hp9k78[0-9] | hp78[0-9])
+		# FIXME: really hppa2.0-hp
+		cpu=hppa1.1
+		vendor=hp
+		;;
+	hp9k8[67]1 | hp8[67]1 | hp9k80[24] | hp80[24] | hp9k8[78]9 | hp8[78]9 | hp9k893 | hp893)
+		# FIXME: really hppa2.0-hp
+		cpu=hppa1.1
+		vendor=hp
+		;;
+	hp9k8[0-9][13679] | hp8[0-9][13679])
+		cpu=hppa1.1
+		vendor=hp
+		;;
+	hp9k8[0-9][0-9] | hp8[0-9][0-9])
+		cpu=hppa1.0
+		vendor=hp
+		;;
+	i*86v32)
+		cpu=`echo "$1" | sed -e 's/86.*/86/'`
+		vendor=pc
+		basic_os=sysv32
+		;;
+	i*86v4*)
+		cpu=`echo "$1" | sed -e 's/86.*/86/'`
+		vendor=pc
+		basic_os=sysv4
+		;;
+	i*86v)
+		cpu=`echo "$1" | sed -e 's/86.*/86/'`
+		vendor=pc
+		basic_os=sysv
+		;;
+	i*86sol2)
+		cpu=`echo "$1" | sed -e 's/86.*/86/'`
+		vendor=pc
+		basic_os=solaris2
+		;;
+	j90 | j90-cray)
+		cpu=j90
+		vendor=cray
+		basic_os=${basic_os:-unicos}
+		;;
+	iris | iris4d)
+		cpu=mips
+		vendor=sgi
+		case $basic_os in
+		    irix*)
+			;;
+		    *)
+			basic_os=irix4
+			;;
+		esac
+		;;
+	miniframe)
+		cpu=m68000
+		vendor=convergent
+		;;
+	*mint | mint[0-9]* | *MiNT | *MiNT[0-9]*)
+		cpu=m68k
+		vendor=atari
+		basic_os=mint
+		;;
+	news-3600 | risc-news)
+		cpu=mips
+		vendor=sony
+		basic_os=newsos
+		;;
+	next | m*-next)
+		cpu=m68k
+		vendor=next
+		case $basic_os in
+		    openstep*)
+		        ;;
+		    nextstep*)
+			;;
+		    ns2*)
+		      basic_os=nextstep2
+			;;
+		    *)
+		      basic_os=nextstep3
+			;;
+		esac
+		;;
+	np1)
+		cpu=np1
+		vendor=gould
+		;;
+	op50n-* | op60c-*)
+		cpu=hppa1.1
+		vendor=oki
+		basic_os=proelf
+		;;
+	pa-hitachi)
+		cpu=hppa1.1
+		vendor=hitachi
+		basic_os=hiuxwe2
+		;;
+	pbd)
+		cpu=sparc
+		vendor=tti
+		;;
+	pbb)
+		cpu=m68k
+		vendor=tti
+		;;
+	pc532)
+		cpu=ns32k
+		vendor=pc532
+		;;
+	pn)
+		cpu=pn
+		vendor=gould
+		;;
+	power)
+		cpu=power
+		vendor=ibm
+		;;
+	ps2)
+		cpu=i386
+		vendor=ibm
+		;;
+	rm[46]00)
+		cpu=mips
+		vendor=siemens
+		;;
+	rtpc | rtpc-*)
+		cpu=romp
+		vendor=ibm
+		;;
+	sde)
+		cpu=mipsisa32
+		vendor=sde
+		basic_os=${basic_os:-elf}
+		;;
+	simso-wrs)
+		cpu=sparclite
+		vendor=wrs
+		basic_os=vxworks
+		;;
+	tower | tower-32)
+		cpu=m68k
+		vendor=ncr
+		;;
+	vpp*|vx|vx-*)
+		cpu=f301
+		vendor=fujitsu
+		;;
+	w65)
+		cpu=w65
+		vendor=wdc
+		;;
+	w89k-*)
+		cpu=hppa1.1
+		vendor=winbond
+		basic_os=proelf
+		;;
+	none)
+		cpu=none
+		vendor=none
+		;;
+	leon|leon[3-9])
+		cpu=sparc
+		vendor=$basic_machine
+		;;
+	leon-*|leon[3-9]-*)
+		cpu=sparc
+		vendor=`echo "$basic_machine" | sed 's/-.*//'`
+		;;
+
+	*-*)
+		# shellcheck disable=SC2162
+		IFS="-" read cpu vendor <<EOF
+$basic_machine
+EOF
+		;;
+	# We use `pc' rather than `unknown'
+	# because (1) that's what they normally are, and
+	# (2) the word "unknown" tends to confuse beginning users.
+	i*86 | x86_64)
+		cpu=$basic_machine
+		vendor=pc
+		;;
+	# These rules are duplicated from below for sake of the special case above;
+	# i.e. things that normalized to x86 arches should also default to "pc"
+	pc98)
+		cpu=i386
+		vendor=pc
+		;;
+	x64 | amd64)
+		cpu=x86_64
+		vendor=pc
+		;;
+	# Recognize the basic CPU types without company name.
+	*)
+		cpu=$basic_machine
+		vendor=unknown
+		;;
+esac
+
+unset -v basic_machine
+
+# Decode basic machines in the full and proper CPU-Company form.
+case $cpu-$vendor in
+	# Here we handle the default manufacturer of certain CPU types in canonical form. It is in
+	# some cases the only manufacturer, in others, it is the most popular.
+	craynv-unknown)
+		vendor=cray
+		basic_os=${basic_os:-unicosmp}
+		;;
+	c90-unknown | c90-cray)
+		vendor=cray
+		basic_os=${Basic_os:-unicos}
+		;;
+	fx80-unknown)
+		vendor=alliant
+		;;
+	romp-unknown)
+		vendor=ibm
+		;;
+	mmix-unknown)
+		vendor=knuth
+		;;
+	microblaze-unknown | microblazeel-unknown)
+		vendor=xilinx
+		;;
+	rs6000-unknown)
+		vendor=ibm
+		;;
+	vax-unknown)
+		vendor=dec
+		;;
+	pdp11-unknown)
+		vendor=dec
+		;;
+	we32k-unknown)
+		vendor=att
+		;;
+	cydra-unknown)
+		vendor=cydrome
+		;;
+	i370-ibm*)
+		vendor=ibm
+		;;
+	orion-unknown)
+		vendor=highlevel
+		;;
+	xps-unknown | xps100-unknown)
+		cpu=xps100
+		vendor=honeywell
+		;;
+
+	# Here we normalize CPU types with a missing or matching vendor
+	dpx20-unknown | dpx20-bull)
+		cpu=rs6000
+		vendor=bull
+		basic_os=${basic_os:-bosx}
+		;;
+
+	# Here we normalize CPU types irrespective of the vendor
+	amd64-*)
+		cpu=x86_64
+		;;
+	blackfin-*)
+		cpu=bfin
+		basic_os=linux
+		;;
+	c54x-*)
+		cpu=tic54x
+		;;
+	c55x-*)
+		cpu=tic55x
+		;;
+	c6x-*)
+		cpu=tic6x
+		;;
+	e500v[12]-*)
+		cpu=powerpc
+		basic_os=${basic_os}"spe"
+		;;
+	mips3*-*)
+		cpu=mips64
+		;;
+	ms1-*)
+		cpu=mt
+		;;
+	m68knommu-*)
+		cpu=m68k
+		basic_os=linux
+		;;
+	m9s12z-* | m68hcs12z-* | hcs12z-* | s12z-*)
+		cpu=s12z
+		;;
+	openrisc-*)
+		cpu=or32
+		;;
+	parisc-*)
+		cpu=hppa
+		basic_os=linux
+		;;
+	pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*)
+		cpu=i586
+		;;
+	pentiumpro-* | p6-* | 6x86-* | athlon-* | athalon_*-*)
+		cpu=i686
+		;;
+	pentiumii-* | pentium2-* | pentiumiii-* | pentium3-*)
+		cpu=i686
+		;;
+	pentium4-*)
+		cpu=i786
+		;;
+	pc98-*)
+		cpu=i386
+		;;
+	ppc-* | ppcbe-*)
+		cpu=powerpc
+		;;
+	ppcle-* | powerpclittle-*)
+		cpu=powerpcle
+		;;
+	ppc64-*)
+		cpu=powerpc64
+		;;
+	ppc64le-* | powerpc64little-*)
+		cpu=powerpc64le
+		;;
+	sb1-*)
+		cpu=mipsisa64sb1
+		;;
+	sb1el-*)
+		cpu=mipsisa64sb1el
+		;;
+	sh5e[lb]-*)
+		cpu=`echo "$cpu" | sed 's/^\(sh.\)e\(.\)$/\1\2e/'`
+		;;
+	spur-*)
+		cpu=spur
+		;;
+	strongarm-* | thumb-*)
+		cpu=arm
+		;;
+	tx39-*)
+		cpu=mipstx39
+		;;
+	tx39el-*)
+		cpu=mipstx39el
+		;;
+	x64-*)
+		cpu=x86_64
+		;;
+	xscale-* | xscalee[bl]-*)
+		cpu=`echo "$cpu" | sed 's/^xscale/arm/'`
+		;;
+	arm64-*)
+		cpu=aarch64
+		;;
+
+	# Recognize the canonical CPU Types that limit and/or modify the
+	# company names they are paired with.
+	cr16-*)
+		basic_os=${basic_os:-elf}
+		;;
+	crisv32-* | etraxfs*-*)
+		cpu=crisv32
+		vendor=axis
+		;;
+	cris-* | etrax*-*)
+		cpu=cris
+		vendor=axis
+		;;
+	crx-*)
+		basic_os=${basic_os:-elf}
+		;;
+	neo-tandem)
+		cpu=neo
+		vendor=tandem
+		;;
+	nse-tandem)
+		cpu=nse
+		vendor=tandem
+		;;
+	nsr-tandem)
+		cpu=nsr
+		vendor=tandem
+		;;
+	nsv-tandem)
+		cpu=nsv
+		vendor=tandem
+		;;
+	nsx-tandem)
+		cpu=nsx
+		vendor=tandem
+		;;
+	mipsallegrexel-sony)
+		cpu=mipsallegrexel
+		vendor=sony
+		;;
+	tile*-*)
+		basic_os=${basic_os:-linux-gnu}
+		;;
+
+	*)
+		# Recognize the canonical CPU types that are allowed with any
+		# company name.
+		case $cpu in
+			1750a | 580 \
+			| a29k \
+			| aarch64 | aarch64_be \
+			| abacus \
+			| alpha | alphaev[4-8] | alphaev56 | alphaev6[78] \
+			| alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] \
+			| alphapca5[67] | alpha64pca5[67] \
+			| am33_2.0 \
+			| amdgcn \
+			| arc | arceb | arc32 | arc64 \
+			| arm | arm[lb]e | arme[lb] | armv* \
+			| avr | avr32 \
+			| asmjs \
+			| ba \
+			| be32 | be64 \
+			| bfin | bpf | bs2000 \
+			| c[123]* | c30 | [cjt]90 | c4x \
+			| c8051 | clipper | craynv | csky | cydra \
+			| d10v | d30v | dlx | dsp16xx \
+			| e2k | elxsi | epiphany \
+			| f30[01] | f700 | fido | fr30 | frv | ft32 | fx80 \
+			| h8300 | h8500 \
+			| hppa | hppa1.[01] | hppa2.0 | hppa2.0[nw] | hppa64 \
+			| hexagon \
+			| i370 | i*86 | i860 | i960 | ia16 | ia64 \
+			| ip2k | iq2000 \
+			| k1om \
+			| le32 | le64 \
+			| lm32 \
+			| loongarch32 | loongarch64 | loongarchx32 \
+			| m32c | m32r | m32rle \
+			| m5200 | m68000 | m680[012346]0 | m68360 | m683?2 | m68k \
+			| m6811 | m68hc11 | m6812 | m68hc12 | m68hcs12x \
+			| m88110 | m88k | maxq | mb | mcore | mep | metag \
+			| microblaze | microblazeel \
+			| mips | mipsbe | mipseb | mipsel | mipsle \
+			| mips16 \
+			| mips64 | mips64eb | mips64el \
+			| mips64octeon | mips64octeonel \
+			| mips64orion | mips64orionel \
+			| mips64r5900 | mips64r5900el \
+			| mips64vr | mips64vrel \
+			| mips64vr4100 | mips64vr4100el \
+			| mips64vr4300 | mips64vr4300el \
+			| mips64vr5000 | mips64vr5000el \
+			| mips64vr5900 | mips64vr5900el \
+			| mipsisa32 | mipsisa32el \
+			| mipsisa32r2 | mipsisa32r2el \
+			| mipsisa32r3 | mipsisa32r3el \
+			| mipsisa32r5 | mipsisa32r5el \
+			| mipsisa32r6 | mipsisa32r6el \
+			| mipsisa64 | mipsisa64el \
+			| mipsisa64r2 | mipsisa64r2el \
+			| mipsisa64r3 | mipsisa64r3el \
+			| mipsisa64r5 | mipsisa64r5el \
+			| mipsisa64r6 | mipsisa64r6el \
+			| mipsisa64sb1 | mipsisa64sb1el \
+			| mipsisa64sr71k | mipsisa64sr71kel \
+			| mipsr5900 | mipsr5900el \
+			| mipstx39 | mipstx39el \
+			| mmix \
+			| mn10200 | mn10300 \
+			| moxie \
+			| mt \
+			| msp430 \
+			| nds32 | nds32le | nds32be \
+			| nfp \
+			| nios | nios2 | nios2eb | nios2el \
+			| none | np1 | ns16k | ns32k | nvptx \
+			| open8 \
+			| or1k* \
+			| or32 \
+			| orion \
+			| picochip \
+			| pdp10 | pdp11 | pj | pjl | pn | power \
+			| powerpc | powerpc64 | powerpc64le | powerpcle | powerpcspe \
+			| pru \
+			| pyramid \
+			| riscv | riscv32 | riscv32be | riscv64 | riscv64be \
+			| rl78 | romp | rs6000 | rx \
+			| s390 | s390x \
+			| score \
+			| sh | shl \
+			| sh[1234] | sh[24]a | sh[24]ae[lb] | sh[23]e | she[lb] | sh[lb]e \
+			| sh[1234]e[lb] |  sh[12345][lb]e | sh[23]ele | sh64 | sh64le \
+			| sparc | sparc64 | sparc64b | sparc64v | sparc86x | sparclet \
+			| sparclite \
+			| sparcv8 | sparcv9 | sparcv9b | sparcv9v | sv1 | sx* \
+			| spu \
+			| tahoe \
+			| thumbv7* \
+			| tic30 | tic4x | tic54x | tic55x | tic6x | tic80 \
+			| tron \
+			| ubicom32 \
+			| v70 | v850 | v850e | v850e1 | v850es | v850e2 | v850e2v3 \
+			| vax \
+			| visium \
+			| w65 \
+			| wasm32 | wasm64 \
+			| we32k \
+			| x86 | x86_64 | xc16x | xgate | xps100 \
+			| xstormy16 | xtensa* \
+			| ymp \
+			| z8k | z80)
+				;;
+
+			*)
+				echo Invalid configuration \`"$1"\': machine \`"$cpu-$vendor"\' not recognized 1>&2
+				exit 1
+				;;
+		esac
+		;;
+esac
+
+# Here we canonicalize certain aliases for manufacturers.
+case $vendor in
+	digital*)
+		vendor=dec
+		;;
+	commodore*)
+		vendor=cbm
+		;;
+	*)
+		;;
+esac
+
+# Decode manufacturer-specific aliases for certain operating systems.
+
+if test x$basic_os != x
+then
+
+# First recognize some ad-hoc caes, or perhaps split kernel-os, or else just
+# set os.
+case $basic_os in
+	gnu/linux*)
+		kernel=linux
+		os=`echo "$basic_os" | sed -e 's|gnu/linux|gnu|'`
+		;;
+	os2-emx)
+		kernel=os2
+		os=`echo "$basic_os" | sed -e 's|os2-emx|emx|'`
+		;;
+	nto-qnx*)
+		kernel=nto
+		os=`echo "$basic_os" | sed -e 's|nto-qnx|qnx|'`
+		;;
+	*-*)
+		# shellcheck disable=SC2162
+		IFS="-" read kernel os <<EOF
+$basic_os
+EOF
+		;;
+	# Default OS when just kernel was specified
+	nto*)
+		kernel=nto
+		os=`echo "$basic_os" | sed -e 's|nto|qnx|'`
+		;;
+	linux*)
+		kernel=linux
+		os=`echo "$basic_os" | sed -e 's|linux|gnu|'`
+		;;
+	*)
+		kernel=
+		os=$basic_os
+		;;
+esac
+
+# Now, normalize the OS (knowing we just have one component, it's not a kernel,
+# etc.)
+case $os in
+	# First match some system type aliases that might get confused
+	# with valid system types.
+	# solaris* is a basic system type, with this one exception.
+	auroraux)
+		os=auroraux
+		;;
+	bluegene*)
+		os=cnk
+		;;
+	solaris1 | solaris1.*)
+		os=`echo "$os" | sed -e 's|solaris1|sunos4|'`
+		;;
+	solaris)
+		os=solaris2
+		;;
+	unixware*)
+		os=sysv4.2uw
+		;;
+	# es1800 is here to avoid being matched by es* (a different OS)
+	es1800*)
+		os=ose
+		;;
+	# Some version numbers need modification
+	chorusos*)
+		os=chorusos
+		;;
+	isc)
+		os=isc2.2
+		;;
+	sco6)
+		os=sco5v6
+		;;
+	sco5)
+		os=sco3.2v5
+		;;
+	sco4)
+		os=sco3.2v4
+		;;
+	sco3.2.[4-9]*)
+		os=`echo "$os" | sed -e 's/sco3.2./sco3.2v/'`
+		;;
+	sco*v* | scout)
+		# Don't match below
+		;;
+	sco*)
+		os=sco3.2v2
+		;;
+	psos*)
+		os=psos
+		;;
+	qnx*)
+		os=qnx
+		;;
+	hiux*)
+		os=hiuxwe2
+		;;
+	lynx*178)
+		os=lynxos178
+		;;
+	lynx*5)
+		os=lynxos5
+		;;
+	lynxos*)
+		# don't get caught up in next wildcard
+		;;
+	lynx*)
+		os=lynxos
+		;;
+	mac[0-9]*)
+		os=`echo "$os" | sed -e 's|mac|macos|'`
+		;;
+	opened*)
+		os=openedition
+		;;
+	os400*)
+		os=os400
+		;;
+	sunos5*)
+		os=`echo "$os" | sed -e 's|sunos5|solaris2|'`
+		;;
+	sunos6*)
+		os=`echo "$os" | sed -e 's|sunos6|solaris3|'`
+		;;
+	wince*)
+		os=wince
+		;;
+	utek*)
+		os=bsd
+		;;
+	dynix*)
+		os=bsd
+		;;
+	acis*)
+		os=aos
+		;;
+	atheos*)
+		os=atheos
+		;;
+	syllable*)
+		os=syllable
+		;;
+	386bsd)
+		os=bsd
+		;;
+	ctix* | uts*)
+		os=sysv
+		;;
+	nova*)
+		os=rtmk-nova
+		;;
+	ns2)
+		os=nextstep2
+		;;
+	# Preserve the version number of sinix5.
+	sinix5.*)
+		os=`echo "$os" | sed -e 's|sinix|sysv|'`
+		;;
+	sinix*)
+		os=sysv4
+		;;
+	tpf*)
+		os=tpf
+		;;
+	triton*)
+		os=sysv3
+		;;
+	oss*)
+		os=sysv3
+		;;
+	svr4*)
+		os=sysv4
+		;;
+	svr3)
+		os=sysv3
+		;;
+	sysvr4)
+		os=sysv4
+		;;
+	ose*)
+		os=ose
+		;;
+	*mint | mint[0-9]* | *MiNT | MiNT[0-9]*)
+		os=mint
+		;;
+	dicos*)
+		os=dicos
+		;;
+	pikeos*)
+		# Until real need of OS specific support for
+		# particular features comes up, bare metal
+		# configurations are quite functional.
+		case $cpu in
+		    arm*)
+			os=eabi
+			;;
+		    *)
+			os=elf
+			;;
+		esac
+		;;
+	*)
+		# No normalization, but not necessarily accepted, that comes below.
+		;;
+esac
+
+else
+
+# Here we handle the default operating systems that come with various machines.
+# The value should be what the vendor currently ships out the door with their
+# machine or put another way, the most popular os provided with the machine.
+
+# Note that if you're going to try to match "-MANUFACTURER" here (say,
+# "-sun"), then you have to tell the case statement up towards the top
+# that MANUFACTURER isn't an operating system.  Otherwise, code above
+# will signal an error saying that MANUFACTURER isn't an operating
+# system, and we'll never get to this point.
+
+kernel=
+case $cpu-$vendor in
+	score-*)
+		os=elf
+		;;
+	spu-*)
+		os=elf
+		;;
+	*-acorn)
+		os=riscix1.2
+		;;
+	arm*-rebel)
+		kernel=linux
+		os=gnu
+		;;
+	arm*-semi)
+		os=aout
+		;;
+	c4x-* | tic4x-*)
+		os=coff
+		;;
+	c8051-*)
+		os=elf
+		;;
+	clipper-intergraph)
+		os=clix
+		;;
+	hexagon-*)
+		os=elf
+		;;
+	tic54x-*)
+		os=coff
+		;;
+	tic55x-*)
+		os=coff
+		;;
+	tic6x-*)
+		os=coff
+		;;
+	# This must come before the *-dec entry.
+	pdp10-*)
+		os=tops20
+		;;
+	pdp11-*)
+		os=none
+		;;
+	*-dec | vax-*)
+		os=ultrix4.2
+		;;
+	m68*-apollo)
+		os=domain
+		;;
+	i386-sun)
+		os=sunos4.0.2
+		;;
+	m68000-sun)
+		os=sunos3
+		;;
+	m68*-cisco)
+		os=aout
+		;;
+	mep-*)
+		os=elf
+		;;
+	mips*-cisco)
+		os=elf
+		;;
+	mips*-*)
+		os=elf
+		;;
+	or32-*)
+		os=coff
+		;;
+	*-tti)	# must be before sparc entry or we get the wrong os.
+		os=sysv3
+		;;
+	sparc-* | *-sun)
+		os=sunos4.1.1
+		;;
+	pru-*)
+		os=elf
+		;;
+	*-be)
+		os=beos
+		;;
+	*-ibm)
+		os=aix
+		;;
+	*-knuth)
+		os=mmixware
+		;;
+	*-wec)
+		os=proelf
+		;;
+	*-winbond)
+		os=proelf
+		;;
+	*-oki)
+		os=proelf
+		;;
+	*-hp)
+		os=hpux
+		;;
+	*-hitachi)
+		os=hiux
+		;;
+	i860-* | *-att | *-ncr | *-altos | *-motorola | *-convergent)
+		os=sysv
+		;;
+	*-cbm)
+		os=amigaos
+		;;
+	*-dg)
+		os=dgux
+		;;
+	*-dolphin)
+		os=sysv3
+		;;
+	m68k-ccur)
+		os=rtu
+		;;
+	m88k-omron*)
+		os=luna
+		;;
+	*-next)
+		os=nextstep
+		;;
+	*-sequent)
+		os=ptx
+		;;
+	*-crds)
+		os=unos
+		;;
+	*-ns)
+		os=genix
+		;;
+	i370-*)
+		os=mvs
+		;;
+	*-gould)
+		os=sysv
+		;;
+	*-highlevel)
+		os=bsd
+		;;
+	*-encore)
+		os=bsd
+		;;
+	*-sgi)
+		os=irix
+		;;
+	*-siemens)
+		os=sysv4
+		;;
+	*-masscomp)
+		os=rtu
+		;;
+	f30[01]-fujitsu | f700-fujitsu)
+		os=uxpv
+		;;
+	*-rom68k)
+		os=coff
+		;;
+	*-*bug)
+		os=coff
+		;;
+	*-apple)
+		os=macos
+		;;
+	*-atari*)
+		os=mint
+		;;
+	*-wrs)
+		os=vxworks
+		;;
+	*)
+		os=none
+		;;
+esac
+
+fi
+
+# Now, validate our (potentially fixed-up) OS.
+case $os in
+	# Sometimes we do "kernel-libc", so those need to count as OSes.
+	musl* | newlib* | uclibc*)
+		;;
+	# Likewise for "kernel-abi"
+	eabi* | gnueabi*)
+		;;
+	# VxWorks passes extra cpu info in the 4th filed.
+	simlinux | simwindows | spe)
+		;;
+	# Now accept the basic system types.
+	# The portable systems comes first.
+	# Each alternative MUST end in a * to match a version number.
+	gnu* | android* | bsd* | mach* | minix* | genix* | ultrix* | irix* \
+	     | *vms* | esix* | aix* | cnk* | sunos | sunos[34]* \
+	     | hpux* | unos* | osf* | luna* | dgux* | auroraux* | solaris* \
+	     | sym* |  plan9* | psp* | sim* | xray* | os68k* | v88r* \
+	     | hiux* | abug | nacl* | netware* | windows* \
+	     | os9* | macos* | osx* | ios* \
+	     | mpw* | magic* | mmixware* | mon960* | lnews* \
+	     | amigaos* | amigados* | msdos* | newsos* | unicos* | aof* \
+	     | aos* | aros* | cloudabi* | sortix* | twizzler* \
+	     | nindy* | vxsim* | vxworks* | ebmon* | hms* | mvs* \
+	     | clix* | riscos* | uniplus* | iris* | isc* | rtu* | xenix* \
+	     | mirbsd* | netbsd* | dicos* | openedition* | ose* \
+	     | bitrig* | openbsd* | secbsd* | solidbsd* | libertybsd* | os108* \
+	     | ekkobsd* | freebsd* | riscix* | lynxos* | os400* \
+	     | bosx* | nextstep* | cxux* | aout* | elf* | oabi* \
+	     | ptx* | coff* | ecoff* | winnt* | domain* | vsta* \
+	     | udi* | lites* | ieee* | go32* | aux* | hcos* \
+	     | chorusrdb* | cegcc* | glidix* | serenity* \
+	     | cygwin* | msys* | pe* | moss* | proelf* | rtems* \
+	     | midipix* | mingw32* | mingw64* | mint* \
+	     | uxpv* | beos* | mpeix* | udk* | moxiebox* \
+	     | interix* | uwin* | mks* | rhapsody* | darwin* \
+	     | openstep* | oskit* | conix* | pw32* | nonstopux* \
+	     | storm-chaos* | tops10* | tenex* | tops20* | its* \
+	     | os2* | vos* | palmos* | uclinux* | nucleus* | morphos* \
+	     | scout* | superux* | sysv* | rtmk* | tpf* | windiss* \
+	     | powermax* | dnix* | nx6 | nx7 | sei* | dragonfly* \
+	     | skyos* | haiku* | rdos* | toppers* | drops* | es* \
+	     | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
+	     | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
+	     | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx*)
+		;;
+	# This one is extra strict with allowed versions
+	sco3.2v2 | sco3.2v[4-9]* | sco5v6*)
+		# Don't forget version if it is 3.2v4 or newer.
+		;;
+	none)
+		;;
+	*)
+		echo Invalid configuration \`"$1"\': OS \`"$os"\' not recognized 1>&2
+		exit 1
+		;;
+esac
+
+# As a final step for OS-related things, validate the OS-kernel combination
+# (given a valid OS), if there is a kernel.
+case $kernel-$os in
+	linux-gnu* | linux-dietlibc* | linux-android* | linux-newlib* | linux-musl* | linux-uclibc* )
+		;;
+	uclinux-uclibc* )
+		;;
+	-dietlibc* | -newlib* | -musl* | -uclibc* )
+		# These are just libc implementations, not actual OSes, and thus
+		# require a kernel.
+		echo "Invalid configuration \`$1': libc \`$os' needs explicit kernel." 1>&2
+		exit 1
+		;;
+	kfreebsd*-gnu* | kopensolaris*-gnu*)
+		;;
+	vxworks-simlinux | vxworks-simwindows | vxworks-spe)
+		;;
+	nto-qnx*)
+		;;
+	os2-emx)
+		;;
+	*-eabi* | *-gnueabi*)
+		;;
+	-*)
+		# Blank kernel with real OS is always fine.
+		;;
+	*-*)
+		echo "Invalid configuration \`$1': Kernel \`$kernel' not known to work with OS \`$os'." 1>&2
+		exit 1
+		;;
+esac
+
+# Here we handle the case where we know the os, and the CPU type, but not the
+# manufacturer.  We pick the logical manufacturer.
+case $vendor in
+	unknown)
+		case $cpu-$os in
+			*-riscix*)
+				vendor=acorn
+				;;
+			*-sunos*)
+				vendor=sun
+				;;
+			*-cnk* | *-aix*)
+				vendor=ibm
+				;;
+			*-beos*)
+				vendor=be
+				;;
+			*-hpux*)
+				vendor=hp
+				;;
+			*-mpeix*)
+				vendor=hp
+				;;
+			*-hiux*)
+				vendor=hitachi
+				;;
+			*-unos*)
+				vendor=crds
+				;;
+			*-dgux*)
+				vendor=dg
+				;;
+			*-luna*)
+				vendor=omron
+				;;
+			*-genix*)
+				vendor=ns
+				;;
+			*-clix*)
+				vendor=intergraph
+				;;
+			*-mvs* | *-opened*)
+				vendor=ibm
+				;;
+			*-os400*)
+				vendor=ibm
+				;;
+			s390-* | s390x-*)
+				vendor=ibm
+				;;
+			*-ptx*)
+				vendor=sequent
+				;;
+			*-tpf*)
+				vendor=ibm
+				;;
+			*-vxsim* | *-vxworks* | *-windiss*)
+				vendor=wrs
+				;;
+			*-aux*)
+				vendor=apple
+				;;
+			*-hms*)
+				vendor=hitachi
+				;;
+			*-mpw* | *-macos*)
+				vendor=apple
+				;;
+			*-*mint | *-mint[0-9]* | *-*MiNT | *-MiNT[0-9]*)
+				vendor=atari
+				;;
+			*-vos*)
+				vendor=stratus
+				;;
+		esac
+		;;
+esac
+
+echo "$cpu-$vendor-${kernel:+$kernel-}$os"
+exit
+
+# Local variables:
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-start: "timestamp='"
+# time-stamp-format: "%:y-%02m-%02d"
+# time-stamp-end: "'"
+# End:
diff --git a/src/grep/build-aux/depcomp b/src/grep/build-aux/depcomp
new file mode 100755
index 0000000..715e343
--- /dev/null
+++ b/src/grep/build-aux/depcomp
@@ -0,0 +1,791 @@
+#! /bin/sh
+# depcomp - compile a program generating dependencies as side-effects
+
+scriptversion=2018-03-07.03; # UTC
+
+# Copyright (C) 1999-2021 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# Originally written by Alexandre Oliva <oliva@dcc.unicamp.br>.
+
+case $1 in
+  '')
+    echo "$0: No command.  Try '$0 --help' for more information." 1>&2
+    exit 1;
+    ;;
+  -h | --h*)
+    cat <<\EOF
+Usage: depcomp [--help] [--version] PROGRAM [ARGS]
+
+Run PROGRAMS ARGS to compile a file, generating dependencies
+as side-effects.
+
+Environment variables:
+  depmode     Dependency tracking mode.
+  source      Source file read by 'PROGRAMS ARGS'.
+  object      Object file output by 'PROGRAMS ARGS'.
+  DEPDIR      directory where to store dependencies.
+  depfile     Dependency file to output.
+  tmpdepfile  Temporary file to use when outputting dependencies.
+  libtool     Whether libtool is used (yes/no).
+
+Report bugs to <bug-automake@gnu.org>.
+EOF
+    exit $?
+    ;;
+  -v | --v*)
+    echo "depcomp $scriptversion"
+    exit $?
+    ;;
+esac
+
+# Get the directory component of the given path, and save it in the
+# global variables '$dir'.  Note that this directory component will
+# be either empty or ending with a '/' character.  This is deliberate.
+set_dir_from ()
+{
+  case $1 in
+    */*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;;
+      *) dir=;;
+  esac
+}
+
+# Get the suffix-stripped basename of the given path, and save it the
+# global variable '$base'.
+set_base_from ()
+{
+  base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'`
+}
+
+# If no dependency file was actually created by the compiler invocation,
+# we still have to create a dummy depfile, to avoid errors with the
+# Makefile "include basename.Plo" scheme.
+make_dummy_depfile ()
+{
+  echo "#dummy" > "$depfile"
+}
+
+# Factor out some common post-processing of the generated depfile.
+# Requires the auxiliary global variable '$tmpdepfile' to be set.
+aix_post_process_depfile ()
+{
+  # If the compiler actually managed to produce a dependency file,
+  # post-process it.
+  if test -f "$tmpdepfile"; then
+    # Each line is of the form 'foo.o: dependency.h'.
+    # Do two passes, one to just change these to
+    #   $object: dependency.h
+    # and one to simply output
+    #   dependency.h:
+    # which is needed to avoid the deleted-header problem.
+    { sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile"
+      sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile"
+    } > "$depfile"
+    rm -f "$tmpdepfile"
+  else
+    make_dummy_depfile
+  fi
+}
+
+# A tabulation character.
+tab='	'
+# A newline character.
+nl='
+'
+# Character ranges might be problematic outside the C locale.
+# These definitions help.
+upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ
+lower=abcdefghijklmnopqrstuvwxyz
+digits=0123456789
+alpha=${upper}${lower}
+
+if test -z "$depmode" || test -z "$source" || test -z "$object"; then
+  echo "depcomp: Variables source, object and depmode must be set" 1>&2
+  exit 1
+fi
+
+# Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
+depfile=${depfile-`echo "$object" |
+  sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
+tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
+
+rm -f "$tmpdepfile"
+
+# Avoid interferences from the environment.
+gccflag= dashmflag=
+
+# Some modes work just like other modes, but use different flags.  We
+# parameterize here, but still list the modes in the big case below,
+# to make depend.m4 easier to write.  Note that we *cannot* use a case
+# here, because this file can only contain one case statement.
+if test "$depmode" = hp; then
+  # HP compiler uses -M and no extra arg.
+  gccflag=-M
+  depmode=gcc
+fi
+
+if test "$depmode" = dashXmstdout; then
+  # This is just like dashmstdout with a different argument.
+  dashmflag=-xM
+  depmode=dashmstdout
+fi
+
+cygpath_u="cygpath -u -f -"
+if test "$depmode" = msvcmsys; then
+  # This is just like msvisualcpp but w/o cygpath translation.
+  # Just convert the backslash-escaped backslashes to single forward
+  # slashes to satisfy depend.m4
+  cygpath_u='sed s,\\\\,/,g'
+  depmode=msvisualcpp
+fi
+
+if test "$depmode" = msvc7msys; then
+  # This is just like msvc7 but w/o cygpath translation.
+  # Just convert the backslash-escaped backslashes to single forward
+  # slashes to satisfy depend.m4
+  cygpath_u='sed s,\\\\,/,g'
+  depmode=msvc7
+fi
+
+if test "$depmode" = xlc; then
+  # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information.
+  gccflag=-qmakedep=gcc,-MF
+  depmode=gcc
+fi
+
+case "$depmode" in
+gcc3)
+## gcc 3 implements dependency tracking that does exactly what
+## we want.  Yay!  Note: for some reason libtool 1.4 doesn't like
+## it if -MD -MP comes after the -MF stuff.  Hmm.
+## Unfortunately, FreeBSD c89 acceptance of flags depends upon
+## the command line argument order; so add the flags where they
+## appear in depend2.am.  Note that the slowdown incurred here
+## affects only configure: in makefiles, %FASTDEP% shortcuts this.
+  for arg
+  do
+    case $arg in
+    -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
+    *)  set fnord "$@" "$arg" ;;
+    esac
+    shift # fnord
+    shift # $arg
+  done
+  "$@"
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  mv "$tmpdepfile" "$depfile"
+  ;;
+
+gcc)
+## Note that this doesn't just cater to obsosete pre-3.x GCC compilers.
+## but also to in-use compilers like IMB xlc/xlC and the HP C compiler.
+## (see the conditional assignment to $gccflag above).
+## There are various ways to get dependency output from gcc.  Here's
+## why we pick this rather obscure method:
+## - Don't want to use -MD because we'd like the dependencies to end
+##   up in a subdir.  Having to rename by hand is ugly.
+##   (We might end up doing this anyway to support other compilers.)
+## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
+##   -MM, not -M (despite what the docs say).  Also, it might not be
+##   supported by the other compilers which use the 'gcc' depmode.
+## - Using -M directly means running the compiler twice (even worse
+##   than renaming).
+  if test -z "$gccflag"; then
+    gccflag=-MD,
+  fi
+  "$@" -Wp,"$gccflag$tmpdepfile"
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  # The second -e expression handles DOS-style file names with drive
+  # letters.
+  sed -e 's/^[^:]*: / /' \
+      -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
+## This next piece of magic avoids the "deleted header file" problem.
+## The problem is that when a header file which appears in a .P file
+## is deleted, the dependency causes make to die (because there is
+## typically no way to rebuild the header).  We avoid this by adding
+## dummy dependencies for each header file.  Too bad gcc doesn't do
+## this for us directly.
+## Some versions of gcc put a space before the ':'.  On the theory
+## that the space means something, we add a space to the output as
+## well.  hp depmode also adds that space, but also prefixes the VPATH
+## to the object.  Take care to not repeat it in the output.
+## Some versions of the HPUX 10.20 sed can't process this invocation
+## correctly.  Breaking it into two sed invocations is a workaround.
+  tr ' ' "$nl" < "$tmpdepfile" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+hp)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+sgi)
+  if test "$libtool" = yes; then
+    "$@" "-Wp,-MDupdate,$tmpdepfile"
+  else
+    "$@" -MDupdate "$tmpdepfile"
+  fi
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+
+  if test -f "$tmpdepfile"; then  # yes, the sourcefile depend on other files
+    echo "$object : \\" > "$depfile"
+    # Clip off the initial element (the dependent).  Don't try to be
+    # clever and replace this with sed code, as IRIX sed won't handle
+    # lines with more than a fixed number of characters (4096 in
+    # IRIX 6.2 sed, 8192 in IRIX 6.5).  We also remove comment lines;
+    # the IRIX cc adds comments like '#:fec' to the end of the
+    # dependency line.
+    tr ' ' "$nl" < "$tmpdepfile" \
+      | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \
+      | tr "$nl" ' ' >> "$depfile"
+    echo >> "$depfile"
+    # The second pass generates a dummy entry for each header file.
+    tr ' ' "$nl" < "$tmpdepfile" \
+      | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
+      >> "$depfile"
+  else
+    make_dummy_depfile
+  fi
+  rm -f "$tmpdepfile"
+  ;;
+
+xlc)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+aix)
+  # The C for AIX Compiler uses -M and outputs the dependencies
+  # in a .u file.  In older versions, this file always lives in the
+  # current directory.  Also, the AIX compiler puts '$object:' at the
+  # start of each line; $object doesn't have directory information.
+  # Version 6 uses the directory in both cases.
+  set_dir_from "$object"
+  set_base_from "$object"
+  if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$base.u
+    tmpdepfile3=$dir.libs/$base.u
+    "$@" -Wc,-M
+  else
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$dir$base.u
+    tmpdepfile3=$dir$base.u
+    "$@" -M
+  fi
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+    exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  aix_post_process_depfile
+  ;;
+
+tcc)
+  # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26
+  # FIXME: That version still under development at the moment of writing.
+  #        Make that this statement remains true also for stable, released
+  #        versions.
+  # It will wrap lines (doesn't matter whether long or short) with a
+  # trailing '\', as in:
+  #
+  #   foo.o : \
+  #    foo.c \
+  #    foo.h \
+  #
+  # It will put a trailing '\' even on the last line, and will use leading
+  # spaces rather than leading tabs (at least since its commit 0394caf7
+  # "Emit spaces for -MD").
+  "$@" -MD -MF "$tmpdepfile"
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'.
+  # We have to change lines of the first kind to '$object: \'.
+  sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile"
+  # And for each line of the second kind, we have to emit a 'dep.h:'
+  # dummy dependency, to avoid the deleted-header problem.
+  sed -n -e 's|^  *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+## The order of this option in the case statement is important, since the
+## shell code in configure will try each of these formats in the order
+## listed in this file.  A plain '-MD' option would be understood by many
+## compilers, so we must ensure this comes after the gcc and icc options.
+pgcc)
+  # Portland's C compiler understands '-MD'.
+  # Will always output deps to 'file.d' where file is the root name of the
+  # source file under compilation, even if file resides in a subdirectory.
+  # The object file name does not affect the name of the '.d' file.
+  # pgcc 10.2 will output
+  #    foo.o: sub/foo.c sub/foo.h
+  # and will wrap long lines using '\' :
+  #    foo.o: sub/foo.c ... \
+  #     sub/foo.h ... \
+  #     ...
+  set_dir_from "$object"
+  # Use the source, not the object, to determine the base name, since
+  # that's sadly what pgcc will do too.
+  set_base_from "$source"
+  tmpdepfile=$base.d
+
+  # For projects that build the same source file twice into different object
+  # files, the pgcc approach of using the *source* file root name can cause
+  # problems in parallel builds.  Use a locking strategy to avoid stomping on
+  # the same $tmpdepfile.
+  lockdir=$base.d-lock
+  trap "
+    echo '$0: caught signal, cleaning up...' >&2
+    rmdir '$lockdir'
+    exit 1
+  " 1 2 13 15
+  numtries=100
+  i=$numtries
+  while test $i -gt 0; do
+    # mkdir is a portable test-and-set.
+    if mkdir "$lockdir" 2>/dev/null; then
+      # This process acquired the lock.
+      "$@" -MD
+      stat=$?
+      # Release the lock.
+      rmdir "$lockdir"
+      break
+    else
+      # If the lock is being held by a different process, wait
+      # until the winning process is done or we timeout.
+      while test -d "$lockdir" && test $i -gt 0; do
+        sleep 1
+        i=`expr $i - 1`
+      done
+    fi
+    i=`expr $i - 1`
+  done
+  trap - 1 2 13 15
+  if test $i -le 0; then
+    echo "$0: failed to acquire lock after $numtries attempts" >&2
+    echo "$0: check lockdir '$lockdir'" >&2
+    exit 1
+  fi
+
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  # Each line is of the form `foo.o: dependent.h',
+  # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
+  # Do two passes, one to just change these to
+  # `$object: dependent.h' and one to simply `dependent.h:'.
+  sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process this invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+hp2)
+  # The "hp" stanza above does not work with aCC (C++) and HP's ia64
+  # compilers, which have integrated preprocessors.  The correct option
+  # to use with these is +Maked; it writes dependencies to a file named
+  # 'foo.d', which lands next to the object file, wherever that
+  # happens to be.
+  # Much of this is similar to the tru64 case; see comments there.
+  set_dir_from  "$object"
+  set_base_from "$object"
+  if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir.libs/$base.d
+    "$@" -Wc,+Maked
+  else
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir$base.d
+    "$@" +Maked
+  fi
+  stat=$?
+  if test $stat -ne 0; then
+     rm -f "$tmpdepfile1" "$tmpdepfile2"
+     exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  if test -f "$tmpdepfile"; then
+    sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile"
+    # Add 'dependent.h:' lines.
+    sed -ne '2,${
+               s/^ *//
+               s/ \\*$//
+               s/$/:/
+               p
+             }' "$tmpdepfile" >> "$depfile"
+  else
+    make_dummy_depfile
+  fi
+  rm -f "$tmpdepfile" "$tmpdepfile2"
+  ;;
+
+tru64)
+  # The Tru64 compiler uses -MD to generate dependencies as a side
+  # effect.  'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
+  # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
+  # dependencies in 'foo.d' instead, so we check for that too.
+  # Subdirectories are respected.
+  set_dir_from  "$object"
+  set_base_from "$object"
+
+  if test "$libtool" = yes; then
+    # Libtool generates 2 separate objects for the 2 libraries.  These
+    # two compilations output dependencies in $dir.libs/$base.o.d and
+    # in $dir$base.o.d.  We have to check for both files, because
+    # one of the two compilations can be disabled.  We should prefer
+    # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
+    # automatically cleaned when .libs/ is deleted, while ignoring
+    # the former would cause a distcleancheck panic.
+    tmpdepfile1=$dir$base.o.d          # libtool 1.5
+    tmpdepfile2=$dir.libs/$base.o.d    # Likewise.
+    tmpdepfile3=$dir.libs/$base.d      # Compaq CCC V6.2-504
+    "$@" -Wc,-MD
+  else
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir$base.d
+    tmpdepfile3=$dir$base.d
+    "$@" -MD
+  fi
+
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+    exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  # Same post-processing that is required for AIX mode.
+  aix_post_process_depfile
+  ;;
+
+msvc7)
+  if test "$libtool" = yes; then
+    showIncludes=-Wc,-showIncludes
+  else
+    showIncludes=-showIncludes
+  fi
+  "$@" $showIncludes > "$tmpdepfile"
+  stat=$?
+  grep -v '^Note: including file: ' "$tmpdepfile"
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  # The first sed program below extracts the file names and escapes
+  # backslashes for cygpath.  The second sed program outputs the file
+  # name when reading, but also accumulates all include files in the
+  # hold buffer in order to output them again at the end.  This only
+  # works with sed implementations that can handle large buffers.
+  sed < "$tmpdepfile" -n '
+/^Note: including file:  *\(.*\)/ {
+  s//\1/
+  s/\\/\\\\/g
+  p
+}' | $cygpath_u | sort -u | sed -n '
+s/ /\\ /g
+s/\(.*\)/'"$tab"'\1 \\/p
+s/.\(.*\) \\/\1:/
+H
+$ {
+  s/.*/'"$tab"'/
+  G
+  p
+}' >> "$depfile"
+  echo >> "$depfile" # make sure the fragment doesn't end with a backslash
+  rm -f "$tmpdepfile"
+  ;;
+
+msvc7msys)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+#nosideeffect)
+  # This comment above is used by automake to tell side-effect
+  # dependency tracking mechanisms from slower ones.
+
+dashmstdout)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout, regardless of -o.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  # Remove '-o $object'.
+  IFS=" "
+  for arg
+  do
+    case $arg in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    *)
+      set fnord "$@" "$arg"
+      shift # fnord
+      shift # $arg
+      ;;
+    esac
+  done
+
+  test -z "$dashmflag" && dashmflag=-M
+  # Require at least two characters before searching for ':'
+  # in the target name.  This is to cope with DOS-style filenames:
+  # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise.
+  "$@" $dashmflag |
+    sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile"
+  rm -f "$depfile"
+  cat < "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process this sed invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  tr ' ' "$nl" < "$tmpdepfile" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+dashXmstdout)
+  # This case only exists to satisfy depend.m4.  It is never actually
+  # run, as this mode is specially recognized in the preamble.
+  exit 1
+  ;;
+
+makedepend)
+  "$@" || exit $?
+  # Remove any Libtool call
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+  # X makedepend
+  shift
+  cleared=no eat=no
+  for arg
+  do
+    case $cleared in
+    no)
+      set ""; shift
+      cleared=yes ;;
+    esac
+    if test $eat = yes; then
+      eat=no
+      continue
+    fi
+    case "$arg" in
+    -D*|-I*)
+      set fnord "$@" "$arg"; shift ;;
+    # Strip any option that makedepend may not understand.  Remove
+    # the object too, otherwise makedepend will parse it as a source file.
+    -arch)
+      eat=yes ;;
+    -*|$object)
+      ;;
+    *)
+      set fnord "$@" "$arg"; shift ;;
+    esac
+  done
+  obj_suffix=`echo "$object" | sed 's/^.*\././'`
+  touch "$tmpdepfile"
+  ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
+  rm -f "$depfile"
+  # makedepend may prepend the VPATH from the source file name to the object.
+  # No need to regex-escape $object, excess matching of '.' is harmless.
+  sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process the last invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  sed '1,2d' "$tmpdepfile" \
+    | tr ' ' "$nl" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile" "$tmpdepfile".bak
+  ;;
+
+cpp)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  # Remove '-o $object'.
+  IFS=" "
+  for arg
+  do
+    case $arg in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    *)
+      set fnord "$@" "$arg"
+      shift # fnord
+      shift # $arg
+      ;;
+    esac
+  done
+
+  "$@" -E \
+    | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
+             -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
+    | sed '$ s: \\$::' > "$tmpdepfile"
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  cat < "$tmpdepfile" >> "$depfile"
+  sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+msvisualcpp)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  IFS=" "
+  for arg
+  do
+    case "$arg" in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
+        set fnord "$@"
+        shift
+        shift
+        ;;
+    *)
+        set fnord "$@" "$arg"
+        shift
+        shift
+        ;;
+    esac
+  done
+  "$@" -E 2>/dev/null |
+  sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile"
+  echo "$tab" >> "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+msvcmsys)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+none)
+  exec "$@"
+  ;;
+
+*)
+  echo "Unknown depmode $depmode" 1>&2
+  exit 1
+  ;;
+esac
+
+exit 0
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/src/grep/build-aux/do-release-commit-and-tag b/src/grep/build-aux/do-release-commit-and-tag
new file mode 100755
index 0000000..5605f42
--- /dev/null
+++ b/src/grep/build-aux/do-release-commit-and-tag
@@ -0,0 +1,179 @@
+#!/bin/sh
+# In a git/autoconf/automake-enabled project with a NEWS file and a version-
+# controlled .prev-version file, automate the procedure by which we record
+# the date, release-type and version string in the NEWS file.  That commit
+# will serve to identify the release, so apply a signed tag to it as well.
+VERSION=2018-03-07.03 # UTC
+
+# Note: this is a bash script (could be zsh or dash)
+
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# Written by Jim Meyering
+
+ME=$(basename "$0")
+warn() { printf '%s: %s\n' "$ME" "$*" >&2; }
+die() { warn "$*"; exit 1; }
+
+help()
+{
+  cat <<EOF
+Usage: $ME [OPTION...] VERSION RELEASE_TYPE
+
+Run this script from top_srcdir to perform the final pre-release NEWS
+update in which the date, release-type and version string are
+recorded.  Commit that result with a log entry marking the release,
+and apply a signed tag.  Run it from your project's top-level
+directory.
+
+Requirements:
+- you use git for version-control
+- a version-controlled .prev-version file
+- a NEWS file, with line 3 identical to this:
+$noteworthy_stub
+
+Options:
+  --branch=BRANCH     set release branch (default: $branch)
+  -C, --builddir=DIR  location of (configured) Makefile (default: $builddir)
+  --help              print this help, then exit
+  --version           print version number, then exit
+
+EXAMPLE:
+To update NEWS and tag the beta 8.1 release of coreutils, I would run this:
+
+  $ME 8.1 beta
+
+Report bugs and patches to <bug-gnulib@gnu.org>.
+EOF
+  exit
+}
+
+version()
+{
+  year=$(echo "$VERSION" | sed 's/[^0-9].*//')
+  cat <<EOF
+$ME $VERSION
+Copyright (C) $year Free Software Foundation, Inc,
+License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
+EOF
+  exit
+}
+
+## ------ ##
+## Main.  ##
+## ------ ##
+
+# Constants.
+noteworthy='* Noteworthy changes in release'
+noteworthy_stub="$noteworthy ?.? (????-??-??) [?]"
+
+# Variables.
+branch=$(git branch | sed -ne '/^\* /{s///;p;q;}')
+builddir=.
+
+while test $# != 0
+do
+  # Handle --option=value by splitting apart and putting back on argv.
+  case $1 in
+    --*=*)
+      opt=$(echo "$1" | sed -e 's/=.*//')
+      val=$(echo "$1" | sed -e 's/[^=]*=//')
+      shift
+      set dummy "$opt" "$val" "$@"; shift
+      ;;
+  esac
+
+  case $1 in
+    --help|--version) ${1#--};;
+    --branch) shift; branch=$1; shift ;;
+    -C|--builddir) shift; builddir=$1; shift ;;
+    --*) die "unrecognized option: $1";;
+    *) break;;
+  esac
+done
+
+test $# = 2 \
+  || die "Usage: $ME [OPTION...] VERSION TYPE"
+
+ver=$1
+type=$2
+
+
+## ---------------------- ##
+## First, sanity checks.  ##
+## ---------------------- ##
+
+# Verify that $ver looks like a version number, and...
+echo "$ver"|grep -E '^[0-9][0-9.]*[0-9]$' > /dev/null \
+  || die "invalid version: $ver"
+prev_ver=$(cat .prev-version) \
+  || die 'failed to determine previous version number from .prev-version'
+
+# Verify that $ver is sensible (> .prev-version).
+case $(printf "$prev_ver\n$ver\n"|sort -V -u|tr '\n' ':') in
+  "$prev_ver:$ver:") ;;
+  *) die "invalid version: $ver (<= $prev_ver)";;
+esac
+
+case $type in
+  alpha|beta|stable) ;;
+  *) die "invalid release type: $type";;
+esac
+
+# No local modifications allowed.
+case $(git diff-index --name-only HEAD) in
+  '') ;;
+  *) die 'this tree is dirty; commit your changes first';;
+esac
+
+# Ensure the current branch name is correct:
+curr_br=$(git rev-parse --symbolic-full-name HEAD)
+test "$curr_br" = "refs/heads/$branch" || die not on branch $branch
+
+# Extract package name from Makefile.
+Makefile=$builddir/Makefile
+pkg=$(sed -n 's/^PACKAGE = \(.*\)/\1/p' "$Makefile") \
+  || die "failed to determine package name from $Makefile"
+
+# Check that line 3 of NEWS is the stub line about to be replaced.
+test "$(sed -n 3p NEWS)" = "$noteworthy_stub" \
+  || die "line 3 of NEWS must be exactly '$noteworthy_stub'"
+
+## --------------- ##
+## Then, changes.  ##
+## --------------- ##
+
+# Update NEWS to have today's date, plus desired version number and $type.
+perl -MPOSIX -ni -e 'my $today = strftime "%F", localtime time;' \
+ -e 'my ($type, $ver) = qw('"$type $ver"');' \
+ -e 'my $pfx = "'"$noteworthy"'";' \
+ -e 'print $.==3 ? "$pfx $ver ($today) [$type]\n" : $_' \
+     NEWS || die 'failed to update NEWS'
+
+printf "version $ver\n\n* NEWS: Record release date.\n" \
+    | git commit -F -  -a || die 'git commit failed'
+git tag -s -m "$pkg $ver" v$ver HEAD || die 'git tag failed'
+
+# Local variables:
+# indent-tabs-mode: nil
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-start: "VERSION="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: " # UTC"
+# End:
diff --git a/src/grep/build-aux/gendocs.sh b/src/grep/build-aux/gendocs.sh
new file mode 100755
index 0000000..1241ee3
--- /dev/null
+++ b/src/grep/build-aux/gendocs.sh
@@ -0,0 +1,510 @@
+#!/bin/sh -e
+# gendocs.sh -- generate a GNU manual in many formats.  This script is
+#   mentioned in maintain.texi.  See the help message below for usage details.
+
+scriptversion=2021-07-19.18
+
+# Copyright 2003-2021 Free Software Foundation, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+# Original author: Mohit Agarwal.
+# Send bug reports and any other correspondence to bug-gnulib@gnu.org.
+#
+# The latest version of this script, and the companion template, is
+# available from the Gnulib repository:
+#
+# https://git.savannah.gnu.org/cgit/gnulib.git/tree/build-aux/gendocs.sh
+# https://git.savannah.gnu.org/cgit/gnulib.git/tree/doc/gendocs_template
+
+# TODO:
+# - image importing was only implemented for HTML generated by
+#   makeinfo.  But it should be simple enough to adjust.
+# - images are not imported in the source tarball.  All the needed
+#   formats (PDF, PNG, etc.) should be included.
+
+prog=`basename "$0"`
+srcdir=`pwd`
+
+scripturl="https://git.savannah.gnu.org/cgit/gnulib.git/plain/build-aux/gendocs.sh"
+templateurl="https://git.savannah.gnu.org/cgit/gnulib.git/plain/doc/gendocs_template"
+
+: ${SETLANG="env LANG= LC_MESSAGES= LC_ALL= LANGUAGE="}
+: ${MAKEINFO="makeinfo"}
+: ${TEXI2DVI="texi2dvi"}
+: ${DOCBOOK2HTML="docbook2html"}
+: ${DOCBOOK2PDF="docbook2pdf"}
+: ${DOCBOOK2TXT="docbook2txt"}
+: ${GENDOCS_TEMPLATE_DIR="."}
+: ${PERL='perl'}
+: ${TEXI2HTML="texi2html"}
+unset CDPATH
+unset use_texi2html
+
+MANUAL_TITLE=
+PACKAGE=
+EMAIL=webmasters@gnu.org  # please override with --email
+commonarg= # passed to all makeinfo/texi2html invcations.
+dirargs=   # passed to all tools (-I dir).
+dirs=      # -I directories.
+htmlarg="--css-ref=https://www.gnu.org/software/gnulib/manual.css -c TOP_NODE_UP_URL=/manual"
+default_htmlarg=true
+infoarg=--no-split
+generate_ascii=true
+generate_html=true
+generate_info=true
+generate_tex=true
+outdir=manual
+source_extra=
+split=node
+srcfile=
+texarg="-t @finalout"
+
+version="gendocs.sh $scriptversion
+
+Copyright 2021 Free Software Foundation, Inc.
+There is NO warranty.  You may redistribute this software
+under the terms of the GNU General Public License.
+For more information about these matters, see the files named COPYING."
+
+usage="Usage: $prog [OPTION]... PACKAGE MANUAL-TITLE
+
+Generate output in various formats from PACKAGE.texinfo (or .texi or
+.txi) source.  See the GNU Maintainers document for a more extensive
+discussion:
+  https://www.gnu.org/prep/maintain_toc.html
+
+Options:
+  --email ADR use ADR as contact in generated web pages; always give this.
+
+  -s SRCFILE   read Texinfo from SRCFILE, instead of PACKAGE.{texinfo|texi|txi}
+  -o OUTDIR    write files into OUTDIR, instead of manual/.
+  -I DIR       append DIR to the Texinfo search path.
+  --common ARG pass ARG in all invocations.
+  --html ARG   pass ARG to makeinfo or texi2html for HTML targets,
+                 instead of '$htmlarg'.
+  --info ARG   pass ARG to makeinfo for Info, instead of --no-split.
+  --no-ascii   skip generating the plain text output.
+  --no-html    skip generating the html output.
+  --no-info    skip generating the info output.
+  --no-tex     skip generating the dvi and pdf output.
+  --source ARG include ARG in tar archive of sources.
+  --split HOW  make split HTML by node, section, chapter; default node.
+  --tex ARG    pass ARG to texi2dvi for DVI and PDF, instead of -t @finalout.
+
+  --texi2html  use texi2html to make HTML target, with all split versions.
+  --docbook    convert through DocBook too (xml, txt, html, pdf).
+
+  --help       display this help and exit successfully.
+  --version    display version information and exit successfully.
+
+Simple example: $prog --email bug-gnu-emacs@gnu.org emacs \"GNU Emacs Manual\"
+
+Typical sequence:
+  cd PACKAGESOURCE/doc
+  wget \"$scripturl\"
+  wget \"$templateurl\"
+  $prog --email BUGLIST MANUAL \"GNU MANUAL - One-line description\"
+
+Output will be in a new subdirectory \"manual\" (by default;
+use -o OUTDIR to override).  Move all the new files into your web CVS
+tree, as explained in the Web Pages node of maintain.texi.
+
+Please use the --email ADDRESS option so your own bug-reporting
+address will be used in the generated HTML pages.
+
+MANUAL-TITLE is included as part of the HTML <title> of the overall
+manual/index.html file.  It should include the name of the package being
+documented.  manual/index.html is created by substitution from the file
+$GENDOCS_TEMPLATE_DIR/gendocs_template.  (Feel free to modify the
+generic template for your own purposes.)
+
+If you have several manuals, you'll need to run this script several
+times with different MANUAL values, specifying a different output
+directory with -o each time.  Then write (by hand) an overall index.html
+with links to them all.
+
+If a manual's Texinfo sources are spread across several directories,
+first copy or symlink all Texinfo sources into a single directory.
+(Part of the script's work is to make a tar.gz of the sources.)
+
+As implied above, by default monolithic Info files are generated.
+If you want split Info, or other Info options, use --info to override.
+
+You can set the environment variables MAKEINFO, TEXI2DVI, TEXI2HTML,
+and PERL to control the programs that get executed, and
+GENDOCS_TEMPLATE_DIR to control where the gendocs_template file is
+looked for.  With --docbook, the environment variables DOCBOOK2HTML,
+DOCBOOK2PDF, and DOCBOOK2TXT are also consulted.
+
+By default, makeinfo and texi2dvi are run in the default (English)
+locale, since that's the language of most Texinfo manuals.  If you
+happen to have a non-English manual and non-English web site, see the
+SETLANG setting in the source.
+
+Email bug reports or enhancement requests to bug-gnulib@gnu.org.
+"
+
+while test $# -gt 0; do
+  case $1 in
+    -s)          shift; srcfile=$1;;
+    -o)          shift; outdir=$1;;
+    -I)          shift; dirargs="$dirargs -I '$1'"; dirs="$dirs $1";;
+    --common)    shift; commonarg=$1;;
+    --docbook)   docbook=yes;;
+    --email)     shift; EMAIL=$1;;
+    --html)      shift; default_htmlarg=false; htmlarg=$1;;
+    --info)      shift; infoarg=$1;;
+    --no-ascii)  generate_ascii=false;;
+    --no-html)   generate_ascii=false;;
+    --no-info)   generate_info=false;;
+    --no-tex)    generate_tex=false;;
+    --source)    shift; source_extra=$1;;
+    --split)     shift; split=$1;;
+    --tex)       shift; texarg=$1;;
+    --texi2html) use_texi2html=1;;
+
+    --help)      echo "$usage"; exit 0;;
+    --version)   echo "$version"; exit 0;;
+    -*)
+      echo "$0: Unknown option \`$1'." >&2
+      echo "$0: Try \`--help' for more information." >&2
+      exit 1;;
+    *)
+      if test -z "$PACKAGE"; then
+        PACKAGE=$1
+      elif test -z "$MANUAL_TITLE"; then
+        MANUAL_TITLE=$1
+      else
+        echo "$0: extra non-option argument \`$1'." >&2
+        exit 1
+      fi;;
+  esac
+  shift
+done
+
+# makeinfo uses the dirargs, but texi2dvi doesn't.
+commonarg=" $dirargs $commonarg"
+
+# For most of the following, the base name is just $PACKAGE
+base=$PACKAGE
+
+if $default_htmlarg && test -n "$use_texi2html"; then
+  # The legacy texi2html doesn't support TOP_NODE_UP_URL
+  htmlarg="--css-ref=https://www.gnu.org/software/gnulib/manual.css"
+fi
+
+if test -n "$srcfile"; then
+  # but here, we use the basename of $srcfile
+  base=`basename "$srcfile"`
+  case $base in
+    *.txi|*.texi|*.texinfo) base=`echo "$base"|sed 's/\.[texinfo]*$//'`;;
+  esac
+  PACKAGE=$base
+elif test -s "$srcdir/$PACKAGE.texinfo"; then
+  srcfile=$srcdir/$PACKAGE.texinfo
+elif test -s "$srcdir/$PACKAGE.texi"; then
+  srcfile=$srcdir/$PACKAGE.texi
+elif test -s "$srcdir/$PACKAGE.txi"; then
+  srcfile=$srcdir/$PACKAGE.txi
+else
+  echo "$0: cannot find .texinfo or .texi or .txi for $PACKAGE in $srcdir." >&2
+  exit 1
+fi
+
+if test ! -r $GENDOCS_TEMPLATE_DIR/gendocs_template; then
+  echo "$0: cannot read $GENDOCS_TEMPLATE_DIR/gendocs_template." >&2
+  echo "$0: it is available from $templateurl." >&2
+  exit 1
+fi
+
+# Function to return size of $1 in something resembling kilobytes.
+calcsize()
+{
+  size=`ls -ksl $1 | awk '{print $1}'`
+  echo $size
+}
+
+# copy_images OUTDIR HTML-FILE...
+# -------------------------------
+# Copy all the images needed by the HTML-FILEs into OUTDIR.
+# Look for them in . and the -I directories; this is simpler than what
+# makeinfo supports with -I, but hopefully it will suffice.
+copy_images()
+{
+  local odir
+  odir=$1
+  shift
+  $PERL -n -e "
+BEGIN {
+  \$me = '$prog';
+  \$odir = '$odir';
+  @dirs = qw(. $dirs);
+}
+" -e '
+/<img src="(.*?)"/g && ++$need{$1};
+
+END {
+  #print "$me: @{[keys %need]}\n";  # for debugging, show images found.
+  FILE: for my $f (keys %need) {
+    for my $d (@dirs) {
+      if (-f "$d/$f") {
+        use File::Basename;
+        my $dest = dirname ("$odir/$f");
+        #
+        use File::Path;
+        -d $dest || mkpath ($dest)
+          || die "$me: cannot mkdir $dest: $!\n";
+        #
+        use File::Copy;
+        copy ("$d/$f", $dest)
+          || die "$me: cannot copy $d/$f to $dest: $!\n";
+        next FILE;
+      }
+    }
+    die "$me: $ARGV: cannot find image $f\n";
+  }
+}
+' -- "$@" || exit 1
+}
+
+case $outdir in
+  /*) abs_outdir=$outdir;;
+  *)  abs_outdir=$srcdir/$outdir;;
+esac
+
+echo "Making output for $srcfile"
+echo " in `pwd`"
+mkdir -p "$outdir/"
+
+# 
+if $generate_info; then
+  cmd="$SETLANG $MAKEINFO -o $PACKAGE.info $commonarg $infoarg \"$srcfile\""
+  echo "Generating info... ($cmd)"
+  rm -f $PACKAGE.info* # get rid of any strays
+  eval "$cmd"
+  tar czf "$outdir/$PACKAGE.info.tar.gz" $PACKAGE.info*
+  ls -l "$outdir/$PACKAGE.info.tar.gz"
+  info_tgz_size=`calcsize "$outdir/$PACKAGE.info.tar.gz"`
+  # do not mv the info files, there's no point in having them available
+  # separately on the web.
+fi  # end info
+
+# 
+if $generate_tex; then
+  cmd="$SETLANG $TEXI2DVI $dirargs $texarg \"$srcfile\""
+  printf "\nGenerating dvi... ($cmd)\n"
+  eval "$cmd"
+  # compress/finish dvi:
+  gzip -f -9 $PACKAGE.dvi
+  dvi_gz_size=`calcsize $PACKAGE.dvi.gz`
+  mv $PACKAGE.dvi.gz "$outdir/"
+  ls -l "$outdir/$PACKAGE.dvi.gz"
+
+  cmd="$SETLANG $TEXI2DVI --pdf $dirargs $texarg \"$srcfile\""
+  printf "\nGenerating pdf... ($cmd)\n"
+  eval "$cmd"
+  pdf_size=`calcsize $PACKAGE.pdf`
+  mv $PACKAGE.pdf "$outdir/"
+  ls -l "$outdir/$PACKAGE.pdf"
+fi # end tex (dvi + pdf)
+
+# 
+if $generate_ascii; then
+  opt="-o $PACKAGE.txt --no-split --no-headers $commonarg"
+  cmd="$SETLANG $MAKEINFO $opt \"$srcfile\""
+  printf "\nGenerating ascii... ($cmd)\n"
+  eval "$cmd"
+  ascii_size=`calcsize $PACKAGE.txt`
+  gzip -f -9 -c $PACKAGE.txt >"$outdir/$PACKAGE.txt.gz"
+  ascii_gz_size=`calcsize "$outdir/$PACKAGE.txt.gz"`
+  mv $PACKAGE.txt "$outdir/"
+  ls -l "$outdir/$PACKAGE.txt" "$outdir/$PACKAGE.txt.gz"
+fi
+
+# 
+
+if $generate_html; then
+# Split HTML at level $1.  Used for texi2html.
+html_split()
+{
+  opt="--split=$1 --node-files $commonarg $htmlarg"
+  cmd="$SETLANG $TEXI2HTML --output $PACKAGE.html $opt \"$srcfile\""
+  printf "\nGenerating html by $1... ($cmd)\n"
+  eval "$cmd"
+  split_html_dir=$PACKAGE.html
+  (
+    cd ${split_html_dir} || exit 1
+    ln -sf ${PACKAGE}.html index.html
+    tar -czf "$abs_outdir/${PACKAGE}.html_$1.tar.gz" -- *.html
+  )
+  eval html_$1_tgz_size=`calcsize "$outdir/${PACKAGE}.html_$1.tar.gz"`
+  rm -f "$outdir"/html_$1/*.html
+  mkdir -p "$outdir/html_$1/"
+  mv ${split_html_dir}/*.html "$outdir/html_$1/"
+  rmdir ${split_html_dir}
+}
+
+if test -z "$use_texi2html"; then
+  opt="--no-split --html -o $PACKAGE.html $commonarg $htmlarg"
+  cmd="$SETLANG $MAKEINFO $opt \"$srcfile\""
+  printf "\nGenerating monolithic html... ($cmd)\n"
+  rm -rf $PACKAGE.html  # in case a directory is left over
+  eval "$cmd"
+  html_mono_size=`calcsize $PACKAGE.html`
+  gzip -f -9 -c $PACKAGE.html >"$outdir/$PACKAGE.html.gz"
+  html_mono_gz_size=`calcsize "$outdir/$PACKAGE.html.gz"`
+  copy_images "$outdir/" $PACKAGE.html
+  mv $PACKAGE.html "$outdir/"
+  ls -l "$outdir/$PACKAGE.html" "$outdir/$PACKAGE.html.gz"
+
+  # Before Texinfo 5.0, makeinfo did not accept a --split=HOW option,
+  # it just always split by node.  So if we're splitting by node anyway,
+  # leave it out.
+  if test "x$split" = xnode; then
+    split_arg=
+  else
+    split_arg=--split=$split
+  fi
+  #
+  opt="--html -o $PACKAGE.html $split_arg $commonarg $htmlarg"
+  cmd="$SETLANG $MAKEINFO $opt \"$srcfile\""
+  printf "\nGenerating html by $split... ($cmd)\n"
+  eval "$cmd"
+  split_html_dir=$PACKAGE.html
+  copy_images $split_html_dir/ $split_html_dir/*.html
+  (
+    cd $split_html_dir || exit 1
+    tar -czf "$abs_outdir/$PACKAGE.html_$split.tar.gz" -- *
+  )
+  eval \
+    html_${split}_tgz_size=`calcsize "$outdir/$PACKAGE.html_$split.tar.gz"`
+  rm -rf "$outdir/html_$split/"
+  mv $split_html_dir "$outdir/html_$split/"
+  du -s "$outdir/html_$split/"
+  ls -l "$outdir/$PACKAGE.html_$split.tar.gz"
+
+else # use texi2html:
+  opt="--output $PACKAGE.html $commonarg $htmlarg"
+  cmd="$SETLANG $TEXI2HTML $opt \"$srcfile\""
+  printf "\nGenerating monolithic html with texi2html... ($cmd)\n"
+  rm -rf $PACKAGE.html  # in case a directory is left over
+  eval "$cmd"
+  html_mono_size=`calcsize $PACKAGE.html`
+  gzip -f -9 -c $PACKAGE.html >"$outdir/$PACKAGE.html.gz"
+  html_mono_gz_size=`calcsize "$outdir/$PACKAGE.html.gz"`
+  mv $PACKAGE.html "$outdir/"
+
+  html_split node
+  html_split chapter
+  html_split section
+fi
+fi # end html
+
+# 
+printf "\nMaking .tar.gz for sources...\n"
+d=`dirname $srcfile`
+(
+  cd "$d"
+  srcfiles=`ls -d *.texinfo *.texi *.txi *.eps $source_extra 2>/dev/null` || true
+  tar czfh "$abs_outdir/$PACKAGE.texi.tar.gz" $srcfiles
+  ls -l "$abs_outdir/$PACKAGE.texi.tar.gz"
+)
+texi_tgz_size=`calcsize "$outdir/$PACKAGE.texi.tar.gz"`
+
+# 
+# Do everything again through docbook.
+if test -n "$docbook"; then
+  opt="-o - --docbook $commonarg"
+  cmd="$SETLANG $MAKEINFO $opt \"$srcfile\" >${srcdir}/$PACKAGE-db.xml"
+  printf "\nGenerating docbook XML... ($cmd)\n"
+  eval "$cmd"
+  docbook_xml_size=`calcsize $PACKAGE-db.xml`
+  gzip -f -9 -c $PACKAGE-db.xml >"$outdir/$PACKAGE-db.xml.gz"
+  docbook_xml_gz_size=`calcsize "$outdir/$PACKAGE-db.xml.gz"`
+  mv $PACKAGE-db.xml "$outdir/"
+
+  split_html_db_dir=html_node_db
+  opt="$commonarg -o $split_html_db_dir"
+  cmd="$DOCBOOK2HTML $opt \"${outdir}/$PACKAGE-db.xml\""
+  printf "\nGenerating docbook HTML... ($cmd)\n"
+  eval "$cmd"
+  (
+    cd ${split_html_db_dir} || exit 1
+    tar -czf "$abs_outdir/${PACKAGE}.html_node_db.tar.gz" -- *.html
+  )
+  html_node_db_tgz_size=`calcsize "$outdir/${PACKAGE}.html_node_db.tar.gz"`
+  rm -f "$outdir"/html_node_db/*.html
+  mkdir -p "$outdir/html_node_db"
+  mv ${split_html_db_dir}/*.html "$outdir/html_node_db/"
+  rmdir ${split_html_db_dir}
+
+  cmd="$DOCBOOK2TXT \"${outdir}/$PACKAGE-db.xml\""
+  printf "\nGenerating docbook ASCII... ($cmd)\n"
+  eval "$cmd"
+  docbook_ascii_size=`calcsize $PACKAGE-db.txt`
+  mv $PACKAGE-db.txt "$outdir/"
+
+  cmd="$DOCBOOK2PDF \"${outdir}/$PACKAGE-db.xml\""
+  printf "\nGenerating docbook PDF... ($cmd)\n"
+  eval "$cmd"
+  docbook_pdf_size=`calcsize $PACKAGE-db.pdf`
+  mv $PACKAGE-db.pdf "$outdir/"
+fi
+
+# 
+printf "\nMaking index.html for $PACKAGE...\n"
+if test -z "$use_texi2html"; then
+  CONDS="/%%IF  *HTML_SECTION%%/,/%%ENDIF  *HTML_SECTION%%/d;\
+         /%%IF  *HTML_CHAPTER%%/,/%%ENDIF  *HTML_CHAPTER%%/d"
+else
+  # should take account of --split here.
+  CONDS="/%%ENDIF.*%%/d;/%%IF  *HTML_SECTION%%/d;/%%IF  *HTML_CHAPTER%%/d"
+fi
+
+curdate=`$SETLANG date '+%B %d, %Y'`
+sed \
+   -e "s!%%TITLE%%!$MANUAL_TITLE!g" \
+   -e "s!%%EMAIL%%!$EMAIL!g" \
+   -e "s!%%PACKAGE%%!$PACKAGE!g" \
+   -e "s!%%DATE%%!$curdate!g" \
+   -e "s!%%HTML_MONO_SIZE%%!$html_mono_size!g" \
+   -e "s!%%HTML_MONO_GZ_SIZE%%!$html_mono_gz_size!g" \
+   -e "s!%%HTML_NODE_TGZ_SIZE%%!$html_node_tgz_size!g" \
+   -e "s!%%HTML_SECTION_TGZ_SIZE%%!$html_section_tgz_size!g" \
+   -e "s!%%HTML_CHAPTER_TGZ_SIZE%%!$html_chapter_tgz_size!g" \
+   -e "s!%%INFO_TGZ_SIZE%%!$info_tgz_size!g" \
+   -e "s!%%DVI_GZ_SIZE%%!$dvi_gz_size!g" \
+   -e "s!%%PDF_SIZE%%!$pdf_size!g" \
+   -e "s!%%ASCII_SIZE%%!$ascii_size!g" \
+   -e "s!%%ASCII_GZ_SIZE%%!$ascii_gz_size!g" \
+   -e "s!%%TEXI_TGZ_SIZE%%!$texi_tgz_size!g" \
+   -e "s!%%DOCBOOK_HTML_NODE_TGZ_SIZE%%!$html_node_db_tgz_size!g" \
+   -e "s!%%DOCBOOK_ASCII_SIZE%%!$docbook_ascii_size!g" \
+   -e "s!%%DOCBOOK_PDF_SIZE%%!$docbook_pdf_size!g" \
+   -e "s!%%DOCBOOK_XML_SIZE%%!$docbook_xml_size!g" \
+   -e "s!%%DOCBOOK_XML_GZ_SIZE%%!$docbook_xml_gz_size!g" \
+   -e "s,%%SCRIPTURL%%,$scripturl,g" \
+   -e "s!%%SCRIPTNAME%%!$prog!g" \
+   -e "$CONDS" \
+$GENDOCS_TEMPLATE_DIR/gendocs_template >"$outdir/index.html"
+
+echo "Done, see $outdir/ subdirectory for new files."
+
+# Local variables:
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-end: "$"
+# End:
diff --git a/src/grep/build-aux/git-version-gen b/src/grep/build-aux/git-version-gen
new file mode 100755
index 0000000..da525aa
--- /dev/null
+++ b/src/grep/build-aux/git-version-gen
@@ -0,0 +1,226 @@
+#!/bin/sh
+# Print a version string.
+scriptversion=2019-10-13.15; # UTC
+
+# Copyright (C) 2007-2021 Free Software Foundation, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# This script is derived from GIT-VERSION-GEN from GIT: https://git-scm.com/.
+# It may be run two ways:
+# - from a git repository in which the "git describe" command below
+#   produces useful output (thus requiring at least one signed tag)
+# - from a non-git-repo directory containing a .tarball-version file, which
+#   presumes this script is invoked like "./git-version-gen .tarball-version".
+
+# In order to use intra-version strings in your project, you will need two
+# separate generated version string files:
+#
+# .tarball-version - present only in a distribution tarball, and not in
+#   a checked-out repository.  Created with contents that were learned at
+#   the last time autoconf was run, and used by git-version-gen.  Must not
+#   be present in either $(srcdir) or $(builddir) for git-version-gen to
+#   give accurate answers during normal development with a checked out tree,
+#   but must be present in a tarball when there is no version control system.
+#   Therefore, it cannot be used in any dependencies.  GNUmakefile has
+#   hooks to force a reconfigure at distribution time to get the value
+#   correct, without penalizing normal development with extra reconfigures.
+#
+# .version - present in a checked-out repository and in a distribution
+#   tarball.  Usable in dependencies, particularly for files that don't
+#   want to depend on config.h but do want to track version changes.
+#   Delete this file prior to any autoconf run where you want to rebuild
+#   files to pick up a version string change; and leave it stale to
+#   minimize rebuild time after unrelated changes to configure sources.
+#
+# As with any generated file in a VC'd directory, you should add
+# /.version to .gitignore, so that you don't accidentally commit it.
+# .tarball-version is never generated in a VC'd directory, so needn't
+# be listed there.
+#
+# Use the following line in your configure.ac, so that $(VERSION) will
+# automatically be up-to-date each time configure is run (and note that
+# since configure.ac no longer includes a version string, Makefile rules
+# should not depend on configure.ac for version updates).
+#
+# AC_INIT([GNU project],
+#         m4_esyscmd([build-aux/git-version-gen .tarball-version]),
+#         [bug-project@example])
+#
+# Then use the following lines in your Makefile.am, so that .version
+# will be present for dependencies, and so that .version and
+# .tarball-version will exist in distribution tarballs.
+#
+# EXTRA_DIST = $(top_srcdir)/.version
+# BUILT_SOURCES = $(top_srcdir)/.version
+# $(top_srcdir)/.version:
+#	echo $(VERSION) > $@-t && mv $@-t $@
+# dist-hook:
+#	echo $(VERSION) > $(distdir)/.tarball-version
+
+
+me=$0
+
+year=`expr "$scriptversion" : '\([^-]*\)'`
+version="git-version-gen $scriptversion
+
+Copyright (C) ${year} Free Software Foundation, Inc.
+License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law."
+
+usage="\
+Usage: $me [OPTION]... \$srcdir/.tarball-version [TAG-NORMALIZATION-SED-SCRIPT]
+Print a version string.
+
+Options:
+
+   --prefix PREFIX    prefix of git tags (default 'v')
+   --fallback VERSION
+                      fallback version to use if \"git --version\" fails
+
+   --help             display this help and exit
+   --version          output version information and exit
+
+Running without arguments will suffice in most cases."
+
+prefix=v
+fallback=
+
+while test $# -gt 0; do
+  case $1 in
+    --help) echo "$usage"; exit 0;;
+    --version) echo "$version"; exit 0;;
+    --prefix) shift; prefix=${1?};;
+    --fallback) shift; fallback=${1?};;
+    -*)
+      echo "$0: Unknown option '$1'." >&2
+      echo "$0: Try '--help' for more information." >&2
+      exit 1;;
+    *)
+      if test "x$tarball_version_file" = x; then
+        tarball_version_file="$1"
+      elif test "x$tag_sed_script" = x; then
+        tag_sed_script="$1"
+      else
+        echo "$0: extra non-option argument '$1'." >&2
+        exit 1
+      fi;;
+  esac
+  shift
+done
+
+if test "x$tarball_version_file" = x; then
+    echo "$usage"
+    exit 1
+fi
+
+tag_sed_script="${tag_sed_script:-s/x/x/}"
+
+nl='
+'
+
+# Avoid meddling by environment variable of the same name.
+v=
+v_from_git=
+
+# First see if there is a tarball-only version file.
+# then try "git describe", then default.
+if test -f $tarball_version_file
+then
+    v=`cat $tarball_version_file` || v=
+    case $v in
+        *$nl*) v= ;; # reject multi-line output
+    esac
+    test "x$v" = x \
+        && echo "$0: WARNING: $tarball_version_file is damaged" 1>&2
+fi
+
+if test "x$v" != x
+then
+    : # use $v
+# Otherwise, if there is at least one git commit involving the working
+# directory, and "git describe" output looks sensible, use that to
+# derive a version string.
+elif test "`git log -1 --pretty=format:x . 2>&1`" = x \
+    && v=`git describe --abbrev=4 --match="$prefix*" HEAD 2>/dev/null \
+          || git describe --abbrev=4 HEAD 2>/dev/null` \
+    && v=`printf '%s\n' "$v" | sed "$tag_sed_script"` \
+    && case $v in
+         $prefix[0-9]*) ;;
+         *) (exit 1) ;;
+       esac
+then
+    # Is this a new git that lists number of commits since the last
+    # tag or the previous older version that did not?
+    #   Newer: v6.10-77-g0f8faeb
+    #   Older: v6.10-g0f8faeb
+    vprefix=`expr "X$v" : 'X\(.*\)-g[^-]*$'` || vprefix=$v
+    case $vprefix in
+        *-*) : git describe is probably okay three part flavor ;;
+        *)
+            : git describe is older two part flavor
+            # Recreate the number of commits and rewrite such that the
+            # result is the same as if we were using the newer version
+            # of git describe.
+            vtag=`echo "$v" | sed 's/-.*//'`
+            commit_list=`git rev-list "$vtag"..HEAD 2>/dev/null` \
+                || { commit_list=failed;
+                     echo "$0: WARNING: git rev-list failed" 1>&2; }
+            numcommits=`echo "$commit_list" | wc -l`
+            v=`echo "$v" | sed "s/\(.*\)-\(.*\)/\1-$numcommits-\2/"`;
+            test "$commit_list" = failed && v=UNKNOWN
+            ;;
+    esac
+
+    # Change the penultimate "-" to ".", for version-comparing tools.
+    # Remove the "g" to save a byte.
+    v=`echo "$v" | sed 's/-\([^-]*\)-g\([^-]*\)$/.\1-\2/'`;
+    v_from_git=1
+elif test "x$fallback" = x || git --version >/dev/null 2>&1; then
+    v=UNKNOWN
+else
+    v=$fallback
+fi
+
+v=`echo "$v" |sed "s/^$prefix//"`
+
+# Test whether to append the "-dirty" suffix only if the version
+# string we're using came from git.  I.e., skip the test if it's "UNKNOWN"
+# or if it came from .tarball-version.
+if test "x$v_from_git" != x; then
+  # Don't declare a version "dirty" merely because a timestamp has changed.
+  git update-index --refresh > /dev/null 2>&1
+
+  dirty=`exec 2>/dev/null;git diff-index --name-only HEAD` || dirty=
+  case "$dirty" in
+      '') ;;
+      *) # Append the suffix only if there isn't one already.
+          case $v in
+            *-dirty) ;;
+            *) v="$v-dirty" ;;
+          esac ;;
+  esac
+fi
+
+# Omit the trailing newline, so that m4_esyscmd can use the result directly.
+printf %s "$v"
+
+# Local variables:
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/src/grep/build-aux/gitlog-to-changelog b/src/grep/build-aux/gitlog-to-changelog
new file mode 100755
index 0000000..9ff15f6
--- /dev/null
+++ b/src/grep/build-aux/gitlog-to-changelog
@@ -0,0 +1,516 @@
+#!/bin/sh
+#! -*-perl-*-
+
+# Convert git log output to ChangeLog format.
+
+# Copyright (C) 2008-2021 Free Software Foundation, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+# Written by Jim Meyering
+
+# This is a prologue that allows to run a perl script as an executable
+# on systems that are compliant to a POSIX version before POSIX:2017.
+# On such systems, the usual invocation of an executable through execlp()
+# or execvp() fails with ENOEXEC if it is a script that does not start
+# with a #! line.  The script interpreter mentioned in the #! line has
+# to be /bin/sh, because on GuixSD systems that is the only program that
+# has a fixed file name.  The second line is essential for perl and is
+# also useful for editing this file in Emacs.  The next two lines below
+# are valid code in both sh and perl.  When executed by sh, they re-execute
+# the script through the perl program found in $PATH.  The '-x' option
+# is essential as well; without it, perl would re-execute the script
+# through /bin/sh.  When executed by perl, the next two lines are a no-op.
+eval 'exec perl -wSx "$0" "$@"'
+     if 0;
+
+my $VERSION = '2021-02-24 23:42'; # UTC
+# The definition above must lie within the first 8 lines in order
+# for the Emacs time-stamp write hook (at end) to update it.
+# If you change this file with Emacs, please let the write hook
+# do its job.  Otherwise, update this string manually.
+
+use strict;
+use warnings;
+use Getopt::Long;
+use POSIX qw(strftime);
+
+(my $ME = $0) =~ s|.*/||;
+
+# use File::Coda; # https://meyering.net/code/Coda/
+END {
+  defined fileno STDOUT or return;
+  close STDOUT and return;
+  warn "$ME: failed to close standard output: $!\n";
+  $? ||= 1;
+}
+
+sub usage ($)
+{
+  my ($exit_code) = @_;
+  my $STREAM = ($exit_code == 0 ? *STDOUT : *STDERR);
+  if ($exit_code != 0)
+    {
+      print $STREAM "Try '$ME --help' for more information.\n";
+    }
+  else
+    {
+      print $STREAM <<EOF;
+Usage: $ME [OPTIONS] [ARGS]
+
+Convert git log output to ChangeLog format.  If present, any ARGS
+are passed to "git log".  To avoid ARGS being parsed as options to
+$ME, they may be preceded by '--'.
+
+OPTIONS:
+
+   --amend=FILE FILE maps from an SHA1 to perl code (i.e., s/old/new/) that
+                  makes a change to SHA1's commit log text or metadata.
+   --append-dot append a dot to the first line of each commit message if
+                  there is no other punctuation or blank at the end.
+   --no-cluster never cluster commit messages under the same date/author
+                  header; the default is to cluster adjacent commit messages
+                  if their headers are the same and neither commit message
+                  contains multiple paragraphs.
+   --srcdir=DIR the root of the source tree, from which the .git/
+                  directory can be derived.
+   --since=DATE convert only the logs since DATE;
+                  the default is to convert all log entries.
+   --until=DATE convert only the logs older than DATE.
+   --ignore-matching=PAT ignore commit messages whose first lines match PAT.
+   --ignore-line=PAT ignore lines of commit messages that match PAT.
+   --format=FMT set format string for commit subject and body;
+                  see 'man git-log' for the list of format metacharacters;
+                  the default is '%s%n%b%n'
+   --strip-tab  remove one additional leading TAB from commit message lines.
+   --strip-cherry-pick  remove data inserted by "git cherry-pick";
+                  this includes the "cherry picked from commit ..." line,
+                  and the possible final "Conflicts:" paragraph.
+   --help       display this help and exit
+   --version    output version information and exit
+
+EXAMPLE:
+
+  $ME --since=2008-01-01 > ChangeLog
+  $ME -- -n 5 foo > last-5-commits-to-branch-foo
+
+SPECIAL SYNTAX:
+
+The following types of strings are interpreted specially when they appear
+at the beginning of a log message line.  They are not copied to the output.
+
+  Copyright-paperwork-exempt: Yes
+    Append the "(tiny change)" notation to the usual "date name email"
+    ChangeLog header to mark a change that does not require a copyright
+    assignment.
+  Co-authored-by: Joe User <user\@example.com>
+    List the specified name and email address on a second
+    ChangeLog header, denoting a co-author.
+  Signed-off-by: Joe User <user\@example.com>
+    These lines are simply elided.
+
+In a FILE specified via --amend, comment lines (starting with "#") are ignored.
+FILE must consist of <SHA,CODE+> pairs where SHA is a 40-byte SHA1 (alone on
+a line) referring to a commit in the current project, and CODE refers to one
+or more consecutive lines of Perl code.  Pairs must be separated by one or
+more blank line.
+
+Here is sample input for use with --amend=FILE, from coreutils:
+
+3a169f4c5d9159283548178668d2fae6fced3030
+# fix typo in title:
+s/all tile types/all file types/
+
+1379ed974f1fa39b12e2ffab18b3f7a607082202
+# Due to a bug in vc-dwim, I mis-attributed a patch by Paul to myself.
+# Change the author to be Paul.  Note the escaped "@":
+s,Jim .*>,Paul Eggert <eggert\\\@cs.ucla.edu>,
+
+EOF
+    }
+  exit $exit_code;
+}
+
+# If the string $S is a well-behaved file name, simply return it.
+# If it contains white space, quotes, etc., quote it, and return the new string.
+sub shell_quote($)
+{
+  my ($s) = @_;
+  if ($s =~ m![^\w+/.,-]!)
+    {
+      # Convert each single quote to '\''
+      $s =~ s/\'/\'\\\'\'/g;
+      # Then single quote the string.
+      $s = "'$s'";
+    }
+  return $s;
+}
+
+sub quoted_cmd(@)
+{
+  return join (' ', map {shell_quote $_} @_);
+}
+
+# Parse file F.
+# Comment lines (starting with "#") are ignored.
+# F must consist of <SHA,CODE+> pairs where SHA is a 40-byte SHA1
+# (alone on a line) referring to a commit in the current project, and
+# CODE refers to one or more consecutive lines of Perl code.
+# Pairs must be separated by one or more blank line.
+sub parse_amend_file($)
+{
+  my ($f) = @_;
+
+  open F, '<', $f
+    or die "$ME: $f: failed to open for reading: $!\n";
+
+  my $fail;
+  my $h = {};
+  my $in_code = 0;
+  my $sha;
+  while (defined (my $line = <F>))
+    {
+      $line =~ /^\#/
+        and next;
+      chomp $line;
+      $line eq ''
+        and $in_code = 0, next;
+
+      if (!$in_code)
+        {
+          $line =~ /^([[:xdigit:]]{40})$/
+            or (warn "$ME: $f:$.: invalid line; expected an SHA1\n"),
+              $fail = 1, next;
+          $sha = lc $1;
+          $in_code = 1;
+          exists $h->{$sha}
+            and (warn "$ME: $f:$.: duplicate SHA1\n"),
+              $fail = 1, next;
+        }
+      else
+        {
+          $h->{$sha} ||= '';
+          $h->{$sha} .= "$line\n";
+        }
+    }
+  close F;
+
+  $fail
+    and exit 1;
+
+  return $h;
+}
+
+# git_dir_option $SRCDIR
+#
+# From $SRCDIR, the --git-dir option to pass to git (none if $SRCDIR
+# is undef).  Return as a list (0 or 1 element).
+sub git_dir_option($)
+{
+  my ($srcdir) = @_;
+  my @res = ();
+  if (defined $srcdir)
+    {
+      my $qdir = shell_quote $srcdir;
+      my $cmd = "cd $qdir && git rev-parse --show-toplevel";
+      my $qcmd = shell_quote $cmd;
+      my $git_dir = qx($cmd);
+      defined $git_dir
+        or die "$ME: cannot run $qcmd: $!\n";
+      $? == 0
+        or die "$ME: $qcmd had unexpected exit code or signal ($?)\n";
+      chomp $git_dir;
+      push @res, "--git-dir=$git_dir/.git";
+    }
+  @res;
+}
+
+{
+  my $since_date;
+  my $until_date;
+  my $format_string = '%s%n%b%n';
+  my $amend_file;
+  my $append_dot = 0;
+  my $cluster = 1;
+  my $ignore_matching;
+  my $ignore_line;
+  my $strip_tab = 0;
+  my $strip_cherry_pick = 0;
+  my $srcdir;
+  GetOptions
+    (
+     help => sub { usage 0 },
+     version => sub { print "$ME version $VERSION\n"; exit },
+     'since=s' => \$since_date,
+     'until=s' => \$until_date,
+     'format=s' => \$format_string,
+     'amend=s' => \$amend_file,
+     'append-dot' => \$append_dot,
+     'cluster!' => \$cluster,
+     'ignore-matching=s' => \$ignore_matching,
+     'ignore-line=s' => \$ignore_line,
+     'strip-tab' => \$strip_tab,
+     'strip-cherry-pick' => \$strip_cherry_pick,
+     'srcdir=s' => \$srcdir,
+    ) or usage 1;
+
+  defined $since_date
+    and unshift @ARGV, "--since=$since_date";
+  defined $until_date
+    and unshift @ARGV, "--until=$until_date";
+
+  # This is a hash that maps an SHA1 to perl code (i.e., s/old/new/)
+  # that makes a correction in the log or attribution of that commit.
+  my $amend_code = defined $amend_file ? parse_amend_file $amend_file : {};
+
+  my @cmd = ('git',
+             git_dir_option $srcdir,
+             qw(log --log-size),
+             '--pretty=format:%H:%ct  %an  <%ae>%n%n'.$format_string, @ARGV);
+  open PIPE, '-|', @cmd
+    or die ("$ME: failed to run '". quoted_cmd (@cmd) ."': $!\n"
+            . "(Is your Git too old?  Version 1.5.1 or later is required.)\n");
+
+  my $prev_multi_paragraph;
+  my $prev_date_line = '';
+  my @prev_coauthors = ();
+  my @skipshas = ();
+  while (1)
+    {
+      defined (my $in = <PIPE>)
+        or last;
+      $in =~ /^log size (\d+)$/
+        or die "$ME:$.: Invalid line (expected log size):\n$in";
+      my $log_nbytes = $1;
+
+      my $log;
+      my $n_read = read PIPE, $log, $log_nbytes;
+      $n_read == $log_nbytes
+        or die "$ME:$.: unexpected EOF\n";
+
+      # Extract leading hash.
+      my ($sha, $rest) = split ':', $log, 2;
+      defined $sha
+        or die "$ME:$.: malformed log entry\n";
+      $sha =~ /^[[:xdigit:]]{40}$/
+        or die "$ME:$.: invalid SHA1: $sha\n";
+
+      my $skipflag = 0;
+      if (@skipshas)
+        {
+          foreach(@skipshas)
+            {
+              if ($sha =~ /^$_/)
+                {
+                  $skipflag = $_;
+                  last;
+                }
+            }
+        }
+
+      # If this commit's log requires any transformation, do it now.
+      my $code = $amend_code->{$sha};
+      if (defined $code)
+        {
+          eval 'use Safe';
+          my $s = new Safe;
+          # Put the unpreprocessed entry into "$_".
+          $_ = $rest;
+
+          # Let $code operate on it, safely.
+          my $r = $s->reval("$code")
+            or die "$ME:$.:$sha: failed to eval \"$code\":\n$@\n";
+
+          # Note that we've used this entry.
+          delete $amend_code->{$sha};
+
+          # Update $rest upon success.
+          $rest = $_;
+        }
+
+      # Remove lines inserted by "git cherry-pick".
+      if ($strip_cherry_pick)
+        {
+          $rest =~ s/^\s*Conflicts:\n.*//sm;
+          $rest =~ s/^\s*\(cherry picked from commit [\da-f]+\)\n//m;
+        }
+
+      my @line = split /[ \t]*\n/, $rest;
+      my $author_line = shift @line;
+      defined $author_line
+        or die "$ME:$.: unexpected EOF\n";
+      $author_line =~ /^(\d+)  (.*>)$/
+        or die "$ME:$.: Invalid line "
+          . "(expected date/author/email):\n$author_line\n";
+
+      # Format 'Copyright-paperwork-exempt: Yes' as a standard ChangeLog
+      # `(tiny change)' annotation.
+      my $tiny = (grep (/^(?:Copyright-paperwork-exempt|Tiny-change):\s+[Yy]es$/, @line)
+                  ? '  (tiny change)' : '');
+
+      my $date_line = sprintf "%s  %s$tiny\n",
+        strftime ("%Y-%m-%d", localtime ($1)), $2;
+
+      my @coauthors = grep /^Co-authored-by:.*$/, @line;
+      # Omit meta-data lines we've already interpreted.
+      @line = grep !/^(?:Signed-off-by:[ ].*>$
+                       |Co-authored-by:[ ]
+                       |Copyright-paperwork-exempt:[ ]
+                       |Tiny-change:[ ]
+                       )/x, @line;
+
+      # Remove leading and trailing blank lines.
+      if (@line)
+        {
+          while ($line[0] =~ /^\s*$/) { shift @line; }
+          while ($line[$#line] =~ /^\s*$/) { pop @line; }
+        }
+
+      # Handle Emacs gitmerge.el "skipped" commits.
+      # Yes, this should be controlled by an option.  So sue me.
+      if ( grep /^(; )?Merge from /, @line )
+      {
+          my $found = 0;
+          foreach (@line)
+          {
+              if (grep /^The following commit.*skipped:$/, $_)
+              {
+                  $found = 1;
+                  ## Reset at each merge to reduce chance of false matches.
+                  @skipshas = ();
+                  next;
+              }
+              if ($found && $_ =~ /^([[:xdigit:]]{7,}) [^ ]/)
+              {
+                  push ( @skipshas, $1 );
+              }
+          }
+      }
+
+      # Ignore commits that match the --ignore-matching pattern, if specified.
+      if (defined $ignore_matching && @line && $line[0] =~ /$ignore_matching/)
+        {
+          $skipflag = 1;
+        }
+      elsif ($skipflag)
+        {
+          ## Perhaps only warn if a pattern matches more than once?
+          warn "$ME: warning: skipping $sha due to $skipflag\n";
+        }
+
+      if (! $skipflag)
+        {
+          if (defined $ignore_line && @line)
+            {
+              @line = grep ! /$ignore_line/, @line;
+              while ($line[$#line] =~ /^\s*$/) { pop @line; }
+            }
+
+          # Record whether there are two or more paragraphs.
+          my $multi_paragraph = grep /^\s*$/, @line;
+
+          # Format 'Co-authored-by: A U Thor <email@example.com>' lines in
+          # standard multi-author ChangeLog format.
+          for (@coauthors)
+            {
+              s/^Co-authored-by:\s*/\t    /;
+              s/\s*</  </;
+
+              /<.*?@.*\..*>/
+                or warn "$ME: warning: missing email address for "
+                  . substr ($_, 5) . "\n";
+            }
+
+          # If clustering of commit messages has been disabled, if this header
+          # would be different from the previous date/name/etc. header,
+          # or if this or the previous entry consists of two or more paragraphs,
+          # then print the header.
+          if ( ! $cluster
+              || $date_line ne $prev_date_line
+              || "@coauthors" ne "@prev_coauthors"
+              || $multi_paragraph
+              || $prev_multi_paragraph)
+            {
+              $prev_date_line eq ''
+                or print "\n";
+              print $date_line;
+              @coauthors
+                and print join ("\n", @coauthors), "\n";
+            }
+          $prev_date_line = $date_line;
+          @prev_coauthors = @coauthors;
+          $prev_multi_paragraph = $multi_paragraph;
+
+          # If there were any lines
+          if (@line == 0)
+            {
+              warn "$ME: warning: empty commit message:\n"
+                   . "  commit $sha\n  $date_line\n";
+            }
+          else
+            {
+              if ($append_dot)
+                {
+                  # If the first line of the message has enough room, then
+                  if (length $line[0] < 72)
+                    {
+                      # append a dot if there is no other punctuation or blank
+                      # at the end.
+                      $line[0] =~ /[[:punct:]\s]$/
+                        or $line[0] .= '.';
+                    }
+                }
+
+              # Remove one additional leading TAB from each line.
+              $strip_tab
+                and map { s/^\t// } @line;
+
+              # Prefix each non-empty line with a TAB.
+              @line = map { length $_ ? "\t$_" : '' } @line;
+
+              print "\n", join ("\n", @line), "\n";
+            }
+        }
+
+      defined ($in = <PIPE>)
+        or last;
+      $in ne "\n"
+        and die "$ME:$.: unexpected line:\n$in";
+    }
+
+  close PIPE
+    or die "$ME: error closing pipe from " . quoted_cmd (@cmd) . "\n";
+  # FIXME-someday: include $PROCESS_STATUS in the diagnostic
+
+  # Complain about any unused entry in the --amend=F specified file.
+  my $fail = 0;
+  foreach my $sha (keys %$amend_code)
+    {
+      warn "$ME:$amend_file: unused entry: $sha\n";
+      $fail = 1;
+    }
+
+  exit $fail;
+}
+
+# Local Variables:
+# mode: perl
+# indent-tabs-mode: nil
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-line-limit: 50
+# time-stamp-start: "my $VERSION = '"
+# time-stamp-format: "%:y-%02m-%02d %02H:%02M"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "'; # UTC"
+# End:
diff --git a/src/grep/build-aux/gnu-web-doc-update b/src/grep/build-aux/gnu-web-doc-update
new file mode 100755
index 0000000..cc553f9
--- /dev/null
+++ b/src/grep/build-aux/gnu-web-doc-update
@@ -0,0 +1,213 @@
+#!/bin/sh
+# Run this after each non-alpha release, to update the web documentation at
+# https://www.gnu.org/software/$pkg/manual/
+
+VERSION=2021-01-09.09; # UTC
+
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+ME=$(basename "$0")
+warn() { printf '%s: %s\n' "$ME" "$*" >&2; }
+die() { warn "$*"; exit 1; }
+
+help()
+{
+  cat <<EOF
+Usage: $ME
+
+Run this script from top_srcdir (no arguments) after each non-alpha
+release, to update the web documentation at
+https://www.gnu.org/software/\$pkg/manual/
+
+This script assumes you're using git for revision control, and
+requires a .prev-version file as well as a Makefile, from which it
+extracts the version number and package name, respectively.  Also, it
+assumes all documentation is in the doc/ sub-directory.
+
+Options:
+  -C, --builddir=DIR  location of (configured) Makefile (default: .)
+  -n, --dry-run       don't actually commit anything
+  -m, --mirror        remove out of date files from document server
+  -u, --user          the name of the CVS user on Savannah
+  --help              print this help, then exit
+  --version           print version number, then exit
+
+Report bugs and patches to <bug-gnulib@gnu.org>.
+EOF
+  exit
+}
+
+version()
+{
+  year=$(echo "$VERSION" | sed 's/[^0-9].*//')
+  cat <<EOF
+$ME $VERSION
+Copyright (C) $year Free Software Foundation, Inc,
+License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
+EOF
+  exit
+}
+
+# find_tool ENVVAR NAMES...
+# -------------------------
+# Search for a required program.  Use the value of ENVVAR, if set,
+# otherwise find the first of the NAMES that can be run (i.e.,
+# supports --version).  If found, set ENVVAR to the program name,
+# die otherwise.
+#
+# FIXME: code duplication, see also bootstrap.
+find_tool ()
+{
+  find_tool_envvar=$1
+  shift
+  find_tool_names=$@
+  eval "find_tool_res=\$$find_tool_envvar"
+  if test x"$find_tool_res" = x; then
+    for i
+    do
+      if ($i --version </dev/null) >/dev/null 2>&1; then
+       find_tool_res=$i
+       break
+      fi
+    done
+  else
+    find_tool_error_prefix="\$$find_tool_envvar: "
+  fi
+  test x"$find_tool_res" != x \
+    || die "one of these is required: $find_tool_names"
+  ($find_tool_res --version </dev/null) >/dev/null 2>&1 \
+    || die "${find_tool_error_prefix}cannot run $find_tool_res --version"
+  eval "$find_tool_envvar=\$find_tool_res"
+  eval "export $find_tool_envvar"
+}
+
+## ------ ##
+## Main.  ##
+## ------ ##
+
+# Requirements: everything required to bootstrap your package, plus
+# these.
+find_tool CVS cvs
+find_tool GIT git
+find_tool RSYNC rsync
+find_tool XARGS gxargs xargs
+
+builddir=.
+dryrun=
+rm_stale='echo'
+cvs_user="$USER"
+while test $# != 0
+do
+  # Handle --option=value by splitting apart and putting back on argv.
+  case $1 in
+    --*=*)
+      opt=$(echo "$1" | sed -e 's/=.*//')
+      val=$(echo "$1" | sed -e 's/[^=]*=//')
+      shift
+      set dummy "$opt" "$val" "$@"; shift
+      ;;
+  esac
+
+  case $1 in
+    --help|--version) ${1#--};;
+    -C|--builddir) shift; builddir=$1; shift ;;
+    -n|--dry-run) dryrun=echo; shift;;
+    -m|--mirror) rm_stale=''; shift;;
+    -u|--user) shift; cvs_user=$1; shift ;;
+    --*) die "unrecognized option: $1";;
+    *) break;;
+  esac
+done
+
+test $# = 0 \
+  || die "too many arguments"
+
+prev=.prev-version
+version=$(cat $prev) || die "no $prev file?"
+pkg=$(sed -n 's/^PACKAGE = \(.*\)/\1/p' $builddir/Makefile) \
+  || die "no Makefile?"
+tmp_branch=web-doc-$version-$$
+current_branch=$($GIT branch | sed -ne '/^\* /{s///;p;q;}')
+
+cleanup()
+{
+  __st=$?
+  $dryrun rm -rf "$tmp"
+  $GIT checkout "$current_branch"
+  $GIT submodule update --recursive
+  $GIT branch -d $tmp_branch
+  exit $__st
+}
+trap cleanup 0
+trap 'exit $?' 1 2 13 15
+
+# We must build using sources for which --version reports the
+# just-released version number, not some string like 7.6.18-20761.
+# That version string propagates into all documentation.
+set -e
+$GIT checkout -b $tmp_branch v$version
+$GIT submodule update --recursive
+./bootstrap
+srcdir=$(pwd)
+cd "$builddir"
+builddir=$(pwd)
+  ./config.status --recheck
+  ./config.status
+  make
+  make web-manual
+cd "$srcdir"
+set +e
+
+tmp=$(mktemp -d web-doc-update.XXXXXX) || exit 1
+( cd $tmp \
+    && $CVS -d $cvs_user@cvs.sv.gnu.org:/webcvs/$pkg co $pkg )
+$RSYNC -avP "$builddir"/doc/manual/ $tmp/$pkg/manual
+
+(
+  cd $tmp/$pkg/manual
+
+  # Add all the files.  This is simpler than trying to add only the
+  # new ones because of new directories
+  # First add non empty dirs individually
+  find . -name CVS -prune -o -type d \! -empty -print             \
+    | $XARGS -n1 --no-run-if-empty -- $dryrun $CVS add -ko
+  # Now add all files
+  find . -name CVS -prune -o -type f -print             \
+    | $XARGS --no-run-if-empty -- $dryrun $CVS add -ko
+
+  # Report/Remove stale files
+  #   excluding doc server specific files like CVS/* and .symlinks
+  if test -n "$rm_stale"; then
+    echo 'Consider the --mirror option if all of the manual is generated,' >&2
+    echo 'which will run `cvs remove` to remove stale files.' >&2
+  fi
+  { find . \( -name CVS -o -type f -name '.*' \) -prune -o -type f -print
+    (cd "$builddir"/doc/manual/ && find . -type f -print | sed p)
+  } | sort | uniq -u \
+    | $XARGS --no-run-if-empty -- ${rm_stale:-$dryrun} $CVS remove -f
+
+  $dryrun $CVS ci -m $version
+)
+
+# Local variables:
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-start: "VERSION="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/src/grep/build-aux/gnupload b/src/grep/build-aux/gnupload
new file mode 100755
index 0000000..e7822ae
--- /dev/null
+++ b/src/grep/build-aux/gnupload
@@ -0,0 +1,480 @@
+#!/bin/sh
+# Sign files and upload them.
+
+scriptversion=2021-04-11.09; # UTC
+
+# Copyright (C) 2004-2021 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# Originally written by Alexandre Duret-Lutz <adl@gnu.org>.
+# The master copy of this file is maintained in the gnulib Git repository.
+# Please send bug reports and feature requests to bug-gnulib@gnu.org.
+
+set -e
+
+GPG=gpg
+# Choose the proper version of gpg, so as to avoid a
+# "gpg-agent is not available in this session" error
+# when gpg-agent is version 2 but gpg is still version 1.
+# FIXME-2020: remove, once all major distros ship gpg version 2 as /usr/bin/gpg
+gpg_agent_version=`(gpg-agent --version) 2>/dev/null | sed -e '2,$d' -e 's/^[^0-9]*//'`
+case "$gpg_agent_version" in
+  2.*)
+    gpg_version=`(gpg --version) 2>/dev/null | sed -e '2,$d' -e 's/^[^0-9]*//'`
+    case "$gpg_version" in
+      1.*)
+        if (type gpg2) >/dev/null 2>/dev/null; then
+          # gpg2 is present.
+          GPG=gpg2
+        else
+          # gpg2 is missing. Ubuntu users should install the package 'gnupg2'.
+          echo "WARNING: Using 'gpg', which is too old. You should install 'gpg2'." 1>&2
+        fi
+        ;;
+    esac
+    ;;
+esac
+
+GPG="${GPG} --batch --no-tty"
+conffile=.gnuploadrc
+to=
+dry_run=false
+replace=
+symlink_files=
+delete_files=
+delete_symlinks=
+collect_var=
+dbg=
+nl='
+'
+
+usage="Usage: $0 [OPTION]... [CMD] FILE... [[CMD] FILE...]
+
+Sign all FILES, and process them at the destinations specified with --to.
+If CMD is not given, it defaults to uploading.  See examples below.
+
+Commands:
+  --delete                 delete FILES from destination
+  --symlink                create symbolic links
+  --rmsymlink              remove symbolic links
+  --                       treat the remaining arguments as files to upload
+
+Options:
+  --to DEST                specify a destination DEST for FILES
+                           (multiple --to options are allowed)
+  --user NAME              sign with key NAME
+  --replace                allow replacements of existing files
+  --symlink-regex[=EXPR]   use sed script EXPR to compute symbolic link names
+  -n, --dry-run            do nothing, show what would have been done
+                           (including the constructed directive file)
+  --version                output version information and exit
+  -h, --help               print this help text and exit
+
+If --symlink-regex is given without EXPR, then the link target name
+is created by replacing the version information with '-latest', e.g.:
+  foo-1.3.4.tar.gz -> foo-latest.tar.gz
+
+Recognized destinations are:
+  alpha.gnu.org:DIRECTORY
+  savannah.gnu.org:DIRECTORY
+  savannah.nongnu.org:DIRECTORY
+  ftp.gnu.org:DIRECTORY
+                           build directive files and upload files by FTP
+  download.gnu.org.ua:{alpha|ftp}/DIRECTORY
+                           build directive files and upload files by SFTP
+  [user@]host:DIRECTORY    upload files with scp
+
+Options and commands are applied in order.  If the file $conffile exists
+in the current working directory, its contents are prepended to the
+actual command line options.  Use this to keep your defaults.  Comments
+(#) and empty lines in $conffile are allowed.
+
+<https://www.gnu.org/prep/maintain/html_node/Automated-FTP-Uploads.html>
+gives some further background.
+
+Examples:
+1. Upload foobar-1.0.tar.gz to ftp.gnu.org:
+  gnupload --to ftp.gnu.org:foobar foobar-1.0.tar.gz
+
+2. Upload foobar-1.0.tar.gz and foobar-1.0.tar.xz to ftp.gnu.org:
+  gnupload --to ftp.gnu.org:foobar foobar-1.0.tar.gz foobar-1.0.tar.xz
+
+3. Same as above, and also create symbolic links to foobar-latest.tar.*:
+  gnupload --to ftp.gnu.org:foobar \\
+           --symlink-regex \\
+           foobar-1.0.tar.gz foobar-1.0.tar.xz
+
+4. Create a symbolic link foobar-latest.tar.gz -> foobar-1.0.tar.gz
+   and likewise for the corresponding .sig file:
+  gnupload --to ftp.gnu.org:foobar \\
+           --symlink foobar-1.0.tar.gz     foobar-latest.tar.gz \\
+                     foobar-1.0.tar.gz.sig foobar-latest.tar.gz.sig
+  or (equivalent):
+  gnupload --to ftp.gnu.org:foobar \\
+           --symlink foobar-1.0.tar.gz     foobar-latest.tar.gz \\
+           --symlink foobar-1.0.tar.gz.sig foobar-latest.tar.gz.sig
+
+5. Upload foobar-0.9.90.tar.gz to two sites:
+  gnupload --to alpha.gnu.org:foobar \\
+           --to sources.redhat.com:~ftp/pub/foobar \\
+           foobar-0.9.90.tar.gz
+
+6. Delete oopsbar-0.9.91.tar.gz and upload foobar-0.9.91.tar.gz
+   (the -- terminates the list of files to delete):
+  gnupload --to alpha.gnu.org:foobar \\
+           --to sources.redhat.com:~ftp/pub/foobar \\
+           --delete oopsbar-0.9.91.tar.gz \\
+           -- foobar-0.9.91.tar.gz
+
+gnupload executes a program ncftpput to do the transfers; if you don't
+happen to have an ncftp package installed, the ncftpput-ftp script in
+the build-aux/ directory of the gnulib package
+(https://savannah.gnu.org/projects/gnulib) may serve as a replacement.
+
+Send patches and bug reports to <bug-gnulib@gnu.org>."
+
+copyright_year=`echo "$scriptversion" | sed -e 's/[^0-9].*//'`
+copyright="Copyright (C) ${copyright_year} Free Software Foundation, Inc.
+License GPLv2+: GNU GPL version 2 or later <https://gnu.org/licenses/gpl.html>.
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law."
+
+# Read local configuration file
+if test -r "$conffile"; then
+  echo "$0: Reading configuration file $conffile"
+  conf=`sed 's/#.*$//;/^$/d' "$conffile" | tr "\015$nl" '  '`
+  eval set x "$conf \"\$@\""
+  shift
+fi
+
+while test -n "$1"; do
+  case $1 in
+  -*)
+    collect_var=
+    case $1 in
+    -h | --help)
+      echo "$usage"
+      exit $?
+      ;;
+    --to)
+      if test -z "$2"; then
+        echo "$0: Missing argument for --to" 1>&2
+        exit 1
+      elif echo "$2" | grep 'ftp-upload\.gnu\.org' >/dev/null; then
+        echo "$0: Use ftp.gnu.org:PKGNAME or alpha.gnu.org:PKGNAME" >&2
+        echo "$0: for the destination, not ftp-upload.gnu.org (which" >&2
+        echo "$0:  is used for direct ftp uploads, not with gnupload)." >&2
+        echo "$0: See --help and its examples if need be." >&2
+        exit 1
+      else
+        to="$to $2"
+        shift
+      fi
+      ;;
+    --user)
+      if test -z "$2"; then
+        echo "$0: Missing argument for --user" 1>&2
+        exit 1
+      else
+        GPG="$GPG --local-user $2"
+        shift
+      fi
+      ;;
+    --delete)
+      collect_var=delete_files
+      ;;
+    --replace)
+      replace="replace: true"
+      ;;
+    --rmsymlink)
+      collect_var=delete_symlinks
+      ;;
+    --symlink-regex=*)
+      symlink_expr=`expr "$1" : '[^=]*=\(.*\)'`
+      ;;
+    --symlink-regex)
+      symlink_expr='s|-[0-9][0-9\.]*\(-[0-9][0-9]*\)\{0,1\}\.|-latest.|'
+      ;;
+    --symlink)
+      collect_var=symlink_files
+      ;;
+    -n | --dry-run)
+      dry_run=:
+      ;;
+    --version)
+      echo "gnupload $scriptversion"
+      echo "$copyright"
+      exit 0
+      ;;
+    --)
+      shift
+      break
+      ;;
+    -*)
+      echo "$0: Unknown option '$1', try '$0 --help'" 1>&2
+      exit 1
+      ;;
+    esac
+    ;;
+  *)
+    if test -z "$collect_var"; then
+      break
+    else
+      eval "$collect_var=\"\$$collect_var $1\""
+    fi
+    ;;
+  esac
+  shift
+done
+
+dprint()
+{
+  echo "Running $* ..."
+}
+
+if $dry_run; then
+  dbg=dprint
+fi
+
+if test -z "$to"; then
+  echo "$0: Missing destination sites" >&2
+  exit 1
+fi
+
+if test -n "$symlink_files"; then
+  x=`echo "$symlink_files" | sed 's/[^ ]//g;s/  //g'`
+  if test -n "$x"; then
+    echo "$0: Odd number of symlink arguments" >&2
+    exit 1
+  fi
+fi
+
+if test $# = 0; then
+  if test -z "${symlink_files}${delete_files}${delete_symlinks}"; then
+    echo "$0: No file to upload" 1>&2
+    exit 1
+  fi
+else
+  # Make sure all files exist.  We don't want to ask
+  # for the passphrase if the script will fail.
+  for file
+  do
+    if test ! -f $file; then
+      echo "$0: Cannot find '$file'" 1>&2
+      exit 1
+    elif test -n "$symlink_expr"; then
+      linkname=`echo $file | sed "$symlink_expr"`
+      if test -z "$linkname"; then
+        echo "$0: symlink expression produces empty results" >&2
+        exit 1
+      elif test "$linkname" = $file; then
+        echo "$0: symlink expression does not alter file name" >&2
+        exit 1
+      fi
+    fi
+  done
+fi
+
+# Make sure passphrase is not exported in the environment.
+unset passphrase
+unset passphrase_fd_0
+GNUPGHOME=${GNUPGHOME:-$HOME/.gnupg}
+
+# Reset PATH to be sure that echo is a built-in.  We will later use
+# 'echo $passphrase' to output the passphrase, so it is important that
+# it is a built-in (third-party programs tend to appear in 'ps'
+# listings with their arguments...).
+# Remember this script runs with 'set -e', so if echo is not built-in
+# it will exit now.
+if $dry_run || grep -q "^use-agent" $GNUPGHOME/gpg.conf; then :; else
+  PATH=/empty echo -n "Enter GPG passphrase: "
+  stty -echo
+  read -r passphrase
+  stty echo
+  echo
+  passphrase_fd_0="--passphrase-fd 0"
+fi
+
+if test $# -ne 0; then
+  for file
+  do
+    echo "Signing $file ..."
+    rm -f $file.sig
+    echo "$passphrase" | $dbg $GPG $passphrase_fd_0 -ba -o $file.sig $file
+  done
+fi
+
+
+# mkdirective DESTDIR BASE FILE STMT
+# Arguments: See upload, below
+mkdirective ()
+{
+  stmt="$4"
+  if test -n "$3"; then
+    stmt="
+filename: $3$stmt"
+  fi
+
+  cat >${2}.directive<<EOF
+version: 1.2
+directory: $1
+comment: gnupload v. $scriptversion$stmt
+EOF
+  if $dry_run; then
+    echo "File ${2}.directive:"
+    cat ${2}.directive
+    echo "File ${2}.directive:" | sed 's/./-/g'
+  fi
+}
+
+mksymlink ()
+{
+  while test $# -ne 0
+  do
+    echo "symlink: $1 $2"
+    shift
+    shift
+  done
+}
+
+# upload DEST DESTDIR BASE FILE STMT FILES
+# Arguments:
+#  DEST     Destination site;
+#  DESTDIR  Destination directory;
+#  BASE     Base name for the directive file;
+#  FILE     Name of the file to distribute (may be empty);
+#  STMT     Additional statements for the directive file;
+#  FILES    List of files to upload.
+upload ()
+{
+  dest=$1
+  destdir=$2
+  base=$3
+  file=$4
+  stmt=$5
+  files=$6
+
+  rm -f $base.directive $base.directive.asc
+  case $dest in
+    alpha.gnu.org:*)
+      mkdirective "$destdir" "$base" "$file" "$stmt"
+      echo "$passphrase" | $dbg $GPG $passphrase_fd_0 --clearsign $base.directive
+      $dbg ncftpput ftp-upload.gnu.org /incoming/alpha $files $base.directive.asc
+      ;;
+    ftp.gnu.org:*)
+      mkdirective "$destdir" "$base" "$file" "$stmt"
+      echo "$passphrase" | $dbg $GPG $passphrase_fd_0 --clearsign $base.directive
+      $dbg ncftpput ftp-upload.gnu.org /incoming/ftp $files $base.directive.asc
+      ;;
+    savannah.gnu.org:*)
+      if test -z "$files"; then
+        echo "$0: warning: standalone directives not applicable for $dest" >&2
+      fi
+      $dbg ncftpput savannah.gnu.org /incoming/savannah/$destdir $files
+      ;;
+    savannah.nongnu.org:*)
+      if test -z "$files"; then
+        echo "$0: warning: standalone directives not applicable for $dest" >&2
+      fi
+      $dbg ncftpput savannah.nongnu.org /incoming/savannah/$destdir $files
+      ;;
+    download.gnu.org.ua:alpha/*|download.gnu.org.ua:ftp/*)
+      destdir_p1=`echo "$destdir" | sed 's,^[^/]*/,,'`
+      destdir_topdir=`echo "$destdir" | sed 's,/.*,,'`
+      mkdirective "$destdir_p1" "$base" "$file" "$stmt"
+      echo "$passphrase" | $dbg $GPG $passphrase_fd_0 --clearsign $base.directive
+      for f in $files $base.directive.asc
+      do
+        echo put $f
+      done | $dbg sftp -b - puszcza.gnu.org.ua:/incoming/$destdir_topdir
+      ;;
+    /*)
+      dest_host=`echo "$dest" | sed 's,:.*,,'`
+      mkdirective "$destdir" "$base" "$file" "$stmt"
+      echo "$passphrase" | $dbg $GPG $passphrase_fd_0 --clearsign $base.directive
+      $dbg cp $files $base.directive.asc $dest_host
+      ;;
+    *)
+      if test -z "$files"; then
+        echo "$0: warning: standalone directives not applicable for $dest" >&2
+      fi
+      $dbg scp $files $dest
+      ;;
+  esac
+  rm -f $base.directive $base.directive.asc
+}
+
+#####
+# Process any standalone directives
+stmt=
+if test -n "$symlink_files"; then
+  stmt="$stmt
+`mksymlink $symlink_files`"
+fi
+
+for file in $delete_files
+do
+  stmt="$stmt
+archive: $file"
+done
+
+for file in $delete_symlinks
+do
+  stmt="$stmt
+rmsymlink: $file"
+done
+
+if test -n "$stmt"; then
+  for dest in $to
+  do
+    destdir=`echo $dest | sed 's/[^:]*://'`
+    upload "$dest" "$destdir" "`hostname`-$$" "" "$stmt"
+  done
+fi
+
+# Process actual uploads
+for dest in $to
+do
+  for file
+  do
+    echo "Uploading $file to $dest ..."
+    stmt=
+    #
+    # allowing file replacement is all or nothing.
+    if test -n "$replace"; then stmt="$stmt
+$replace"
+    fi
+    #
+    files="$file $file.sig"
+    destdir=`echo $dest | sed 's/[^:]*://'`
+    if test -n "$symlink_expr"; then
+      linkname=`echo $file | sed "$symlink_expr"`
+      stmt="$stmt
+symlink: $file $linkname
+symlink: $file.sig $linkname.sig"
+    fi
+    upload "$dest" "$destdir" "$file" "$file" "$stmt" "$files"
+  done
+done
+
+exit 0
+
+# Local variables:
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/src/grep/build-aux/install-sh b/src/grep/build-aux/install-sh
new file mode 100755
index 0000000..ec298b5
--- /dev/null
+++ b/src/grep/build-aux/install-sh
@@ -0,0 +1,541 @@
+#!/bin/sh
+# install - install a program, script, or datafile
+
+scriptversion=2020-11-14.01; # UTC
+
+# This originates from X11R5 (mit/util/scripts/install.sh), which was
+# later released in X11R6 (xc/config/util/install.sh) with the
+# following copyright and license.
+#
+# Copyright (C) 1994 X Consortium
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to
+# deal in the Software without restriction, including without limitation the
+# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+# sell copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+# X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC-
+# TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+# Except as contained in this notice, the name of the X Consortium shall not
+# be used in advertising or otherwise to promote the sale, use or other deal-
+# ings in this Software without prior written authorization from the X Consor-
+# tium.
+#
+#
+# FSF changes to this file are in the public domain.
+#
+# Calling this script install-sh is preferred over install.sh, to prevent
+# 'make' implicit rules from creating a file called install from it
+# when there is no Makefile.
+#
+# This script is compatible with the BSD install script, but was written
+# from scratch.
+
+tab='	'
+nl='
+'
+IFS=" $tab$nl"
+
+# Set DOITPROG to "echo" to test this script.
+
+doit=${DOITPROG-}
+doit_exec=${doit:-exec}
+
+# Put in absolute file names if you don't have them in your path;
+# or use environment vars.
+
+chgrpprog=${CHGRPPROG-chgrp}
+chmodprog=${CHMODPROG-chmod}
+chownprog=${CHOWNPROG-chown}
+cmpprog=${CMPPROG-cmp}
+cpprog=${CPPROG-cp}
+mkdirprog=${MKDIRPROG-mkdir}
+mvprog=${MVPROG-mv}
+rmprog=${RMPROG-rm}
+stripprog=${STRIPPROG-strip}
+
+posix_mkdir=
+
+# Desired mode of installed file.
+mode=0755
+
+# Create dirs (including intermediate dirs) using mode 755.
+# This is like GNU 'install' as of coreutils 8.32 (2020).
+mkdir_umask=22
+
+backupsuffix=
+chgrpcmd=
+chmodcmd=$chmodprog
+chowncmd=
+mvcmd=$mvprog
+rmcmd="$rmprog -f"
+stripcmd=
+
+src=
+dst=
+dir_arg=
+dst_arg=
+
+copy_on_change=false
+is_target_a_directory=possibly
+
+usage="\
+Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE
+   or: $0 [OPTION]... SRCFILES... DIRECTORY
+   or: $0 [OPTION]... -t DIRECTORY SRCFILES...
+   or: $0 [OPTION]... -d DIRECTORIES...
+
+In the 1st form, copy SRCFILE to DSTFILE.
+In the 2nd and 3rd, copy all SRCFILES to DIRECTORY.
+In the 4th, create DIRECTORIES.
+
+Options:
+     --help     display this help and exit.
+     --version  display version info and exit.
+
+  -c            (ignored)
+  -C            install only if different (preserve data modification time)
+  -d            create directories instead of installing files.
+  -g GROUP      $chgrpprog installed files to GROUP.
+  -m MODE       $chmodprog installed files to MODE.
+  -o USER       $chownprog installed files to USER.
+  -p            pass -p to $cpprog.
+  -s            $stripprog installed files.
+  -S SUFFIX     attempt to back up existing files, with suffix SUFFIX.
+  -t DIRECTORY  install into DIRECTORY.
+  -T            report an error if DSTFILE is a directory.
+
+Environment variables override the default commands:
+  CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG
+  RMPROG STRIPPROG
+
+By default, rm is invoked with -f; when overridden with RMPROG,
+it's up to you to specify -f if you want it.
+
+If -S is not specified, no backups are attempted.
+
+Email bug reports to bug-automake@gnu.org.
+Automake home page: https://www.gnu.org/software/automake/
+"
+
+while test $# -ne 0; do
+  case $1 in
+    -c) ;;
+
+    -C) copy_on_change=true;;
+
+    -d) dir_arg=true;;
+
+    -g) chgrpcmd="$chgrpprog $2"
+        shift;;
+
+    --help) echo "$usage"; exit $?;;
+
+    -m) mode=$2
+        case $mode in
+          *' '* | *"$tab"* | *"$nl"* | *'*'* | *'?'* | *'['*)
+            echo "$0: invalid mode: $mode" >&2
+            exit 1;;
+        esac
+        shift;;
+
+    -o) chowncmd="$chownprog $2"
+        shift;;
+
+    -p) cpprog="$cpprog -p";;
+
+    -s) stripcmd=$stripprog;;
+
+    -S) backupsuffix="$2"
+        shift;;
+
+    -t)
+        is_target_a_directory=always
+        dst_arg=$2
+        # Protect names problematic for 'test' and other utilities.
+        case $dst_arg in
+          -* | [=\(\)!]) dst_arg=./$dst_arg;;
+        esac
+        shift;;
+
+    -T) is_target_a_directory=never;;
+
+    --version) echo "$0 $scriptversion"; exit $?;;
+
+    --) shift
+        break;;
+
+    -*) echo "$0: invalid option: $1" >&2
+        exit 1;;
+
+    *)  break;;
+  esac
+  shift
+done
+
+# We allow the use of options -d and -T together, by making -d
+# take the precedence; this is for compatibility with GNU install.
+
+if test -n "$dir_arg"; then
+  if test -n "$dst_arg"; then
+    echo "$0: target directory not allowed when installing a directory." >&2
+    exit 1
+  fi
+fi
+
+if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then
+  # When -d is used, all remaining arguments are directories to create.
+  # When -t is used, the destination is already specified.
+  # Otherwise, the last argument is the destination.  Remove it from $@.
+  for arg
+  do
+    if test -n "$dst_arg"; then
+      # $@ is not empty: it contains at least $arg.
+      set fnord "$@" "$dst_arg"
+      shift # fnord
+    fi
+    shift # arg
+    dst_arg=$arg
+    # Protect names problematic for 'test' and other utilities.
+    case $dst_arg in
+      -* | [=\(\)!]) dst_arg=./$dst_arg;;
+    esac
+  done
+fi
+
+if test $# -eq 0; then
+  if test -z "$dir_arg"; then
+    echo "$0: no input file specified." >&2
+    exit 1
+  fi
+  # It's OK to call 'install-sh -d' without argument.
+  # This can happen when creating conditional directories.
+  exit 0
+fi
+
+if test -z "$dir_arg"; then
+  if test $# -gt 1 || test "$is_target_a_directory" = always; then
+    if test ! -d "$dst_arg"; then
+      echo "$0: $dst_arg: Is not a directory." >&2
+      exit 1
+    fi
+  fi
+fi
+
+if test -z "$dir_arg"; then
+  do_exit='(exit $ret); exit $ret'
+  trap "ret=129; $do_exit" 1
+  trap "ret=130; $do_exit" 2
+  trap "ret=141; $do_exit" 13
+  trap "ret=143; $do_exit" 15
+
+  # Set umask so as not to create temps with too-generous modes.
+  # However, 'strip' requires both read and write access to temps.
+  case $mode in
+    # Optimize common cases.
+    *644) cp_umask=133;;
+    *755) cp_umask=22;;
+
+    *[0-7])
+      if test -z "$stripcmd"; then
+        u_plus_rw=
+      else
+        u_plus_rw='% 200'
+      fi
+      cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;;
+    *)
+      if test -z "$stripcmd"; then
+        u_plus_rw=
+      else
+        u_plus_rw=,u+rw
+      fi
+      cp_umask=$mode$u_plus_rw;;
+  esac
+fi
+
+for src
+do
+  # Protect names problematic for 'test' and other utilities.
+  case $src in
+    -* | [=\(\)!]) src=./$src;;
+  esac
+
+  if test -n "$dir_arg"; then
+    dst=$src
+    dstdir=$dst
+    test -d "$dstdir"
+    dstdir_status=$?
+    # Don't chown directories that already exist.
+    if test $dstdir_status = 0; then
+      chowncmd=""
+    fi
+  else
+
+    # Waiting for this to be detected by the "$cpprog $src $dsttmp" command
+    # might cause directories to be created, which would be especially bad
+    # if $src (and thus $dsttmp) contains '*'.
+    if test ! -f "$src" && test ! -d "$src"; then
+      echo "$0: $src does not exist." >&2
+      exit 1
+    fi
+
+    if test -z "$dst_arg"; then
+      echo "$0: no destination specified." >&2
+      exit 1
+    fi
+    dst=$dst_arg
+
+    # If destination is a directory, append the input filename.
+    if test -d "$dst"; then
+      if test "$is_target_a_directory" = never; then
+        echo "$0: $dst_arg: Is a directory" >&2
+        exit 1
+      fi
+      dstdir=$dst
+      dstbase=`basename "$src"`
+      case $dst in
+	*/) dst=$dst$dstbase;;
+	*)  dst=$dst/$dstbase;;
+      esac
+      dstdir_status=0
+    else
+      dstdir=`dirname "$dst"`
+      test -d "$dstdir"
+      dstdir_status=$?
+    fi
+  fi
+
+  case $dstdir in
+    */) dstdirslash=$dstdir;;
+    *)  dstdirslash=$dstdir/;;
+  esac
+
+  obsolete_mkdir_used=false
+
+  if test $dstdir_status != 0; then
+    case $posix_mkdir in
+      '')
+        # With -d, create the new directory with the user-specified mode.
+        # Otherwise, rely on $mkdir_umask.
+        if test -n "$dir_arg"; then
+          mkdir_mode=-m$mode
+        else
+          mkdir_mode=
+        fi
+
+        posix_mkdir=false
+	# The $RANDOM variable is not portable (e.g., dash).  Use it
+	# here however when possible just to lower collision chance.
+	tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$
+
+	trap '
+	  ret=$?
+	  rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir" 2>/dev/null
+	  exit $ret
+	' 0
+
+	# Because "mkdir -p" follows existing symlinks and we likely work
+	# directly in world-writeable /tmp, make sure that the '$tmpdir'
+	# directory is successfully created first before we actually test
+	# 'mkdir -p'.
+	if (umask $mkdir_umask &&
+	    $mkdirprog $mkdir_mode "$tmpdir" &&
+	    exec $mkdirprog $mkdir_mode -p -- "$tmpdir/a/b") >/dev/null 2>&1
+	then
+	  if test -z "$dir_arg" || {
+	       # Check for POSIX incompatibilities with -m.
+	       # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or
+	       # other-writable bit of parent directory when it shouldn't.
+	       # FreeBSD 6.1 mkdir -m -p sets mode of existing directory.
+	       test_tmpdir="$tmpdir/a"
+	       ls_ld_tmpdir=`ls -ld "$test_tmpdir"`
+	       case $ls_ld_tmpdir in
+		 d????-?r-*) different_mode=700;;
+		 d????-?--*) different_mode=755;;
+		 *) false;;
+	       esac &&
+	       $mkdirprog -m$different_mode -p -- "$test_tmpdir" && {
+		 ls_ld_tmpdir_1=`ls -ld "$test_tmpdir"`
+		 test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1"
+	       }
+	     }
+	  then posix_mkdir=:
+	  fi
+	  rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir"
+	else
+	  # Remove any dirs left behind by ancient mkdir implementations.
+	  rmdir ./$mkdir_mode ./-p ./-- "$tmpdir" 2>/dev/null
+	fi
+	trap '' 0;;
+    esac
+
+    if
+      $posix_mkdir && (
+        umask $mkdir_umask &&
+        $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir"
+      )
+    then :
+    else
+
+      # mkdir does not conform to POSIX,
+      # or it failed possibly due to a race condition.  Create the
+      # directory the slow way, step by step, checking for races as we go.
+
+      case $dstdir in
+        /*) prefix='/';;
+        [-=\(\)!]*) prefix='./';;
+        *)  prefix='';;
+      esac
+
+      oIFS=$IFS
+      IFS=/
+      set -f
+      set fnord $dstdir
+      shift
+      set +f
+      IFS=$oIFS
+
+      prefixes=
+
+      for d
+      do
+        test X"$d" = X && continue
+
+        prefix=$prefix$d
+        if test -d "$prefix"; then
+          prefixes=
+        else
+          if $posix_mkdir; then
+            (umask $mkdir_umask &&
+             $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break
+            # Don't fail if two instances are running concurrently.
+            test -d "$prefix" || exit 1
+          else
+            case $prefix in
+              *\'*) qprefix=`echo "$prefix" | sed "s/'/'\\\\\\\\''/g"`;;
+              *) qprefix=$prefix;;
+            esac
+            prefixes="$prefixes '$qprefix'"
+          fi
+        fi
+        prefix=$prefix/
+      done
+
+      if test -n "$prefixes"; then
+        # Don't fail if two instances are running concurrently.
+        (umask $mkdir_umask &&
+         eval "\$doit_exec \$mkdirprog $prefixes") ||
+          test -d "$dstdir" || exit 1
+        obsolete_mkdir_used=true
+      fi
+    fi
+  fi
+
+  if test -n "$dir_arg"; then
+    { test -z "$chowncmd" || $doit $chowncmd "$dst"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } &&
+    { test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false ||
+      test -z "$chmodcmd" || $doit $chmodcmd $mode "$dst"; } || exit 1
+  else
+
+    # Make a couple of temp file names in the proper directory.
+    dsttmp=${dstdirslash}_inst.$$_
+    rmtmp=${dstdirslash}_rm.$$_
+
+    # Trap to clean up those temp files at exit.
+    trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0
+
+    # Copy the file name to the temp name.
+    (umask $cp_umask &&
+     { test -z "$stripcmd" || {
+	 # Create $dsttmp read-write so that cp doesn't create it read-only,
+	 # which would cause strip to fail.
+	 if test -z "$doit"; then
+	   : >"$dsttmp" # No need to fork-exec 'touch'.
+	 else
+	   $doit touch "$dsttmp"
+	 fi
+       }
+     } &&
+     $doit_exec $cpprog "$src" "$dsttmp") &&
+
+    # and set any options; do chmod last to preserve setuid bits.
+    #
+    # If any of these fail, we abort the whole thing.  If we want to
+    # ignore errors from any of these, just make sure not to ignore
+    # errors from the above "$doit $cpprog $src $dsttmp" command.
+    #
+    { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } &&
+    { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } &&
+    { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } &&
+
+    # If -C, don't bother to copy if it wouldn't change the file.
+    if $copy_on_change &&
+       old=`LC_ALL=C ls -dlL "$dst"     2>/dev/null` &&
+       new=`LC_ALL=C ls -dlL "$dsttmp"  2>/dev/null` &&
+       set -f &&
+       set X $old && old=:$2:$4:$5:$6 &&
+       set X $new && new=:$2:$4:$5:$6 &&
+       set +f &&
+       test "$old" = "$new" &&
+       $cmpprog "$dst" "$dsttmp" >/dev/null 2>&1
+    then
+      rm -f "$dsttmp"
+    else
+      # If $backupsuffix is set, and the file being installed
+      # already exists, attempt a backup.  Don't worry if it fails,
+      # e.g., if mv doesn't support -f.
+      if test -n "$backupsuffix" && test -f "$dst"; then
+        $doit $mvcmd -f "$dst" "$dst$backupsuffix" 2>/dev/null
+      fi
+
+      # Rename the file to the real destination.
+      $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null ||
+
+      # The rename failed, perhaps because mv can't rename something else
+      # to itself, or perhaps because mv is so ancient that it does not
+      # support -f.
+      {
+        # Now remove or move aside any old file at destination location.
+        # We try this two ways since rm can't unlink itself on some
+        # systems and the destination file might be busy for other
+        # reasons.  In this case, the final cleanup might fail but the new
+        # file should still install successfully.
+        {
+          test ! -f "$dst" ||
+          $doit $rmcmd "$dst" 2>/dev/null ||
+          { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null &&
+            { $doit $rmcmd "$rmtmp" 2>/dev/null; :; }
+          } ||
+          { echo "$0: cannot unlink or rename $dst" >&2
+            (exit 1); exit 1
+          }
+        } &&
+
+        # Now rename the file to the real destination.
+        $doit $mvcmd "$dsttmp" "$dst"
+      }
+    fi || exit 1
+
+    trap '' 0
+  fi
+done
+
+# Local variables:
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/src/grep/build-aux/mdate-sh b/src/grep/build-aux/mdate-sh
new file mode 100755
index 0000000..e6d572d
--- /dev/null
+++ b/src/grep/build-aux/mdate-sh
@@ -0,0 +1,228 @@
+#!/bin/sh
+# Get modification time of a file or directory and pretty-print it.
+
+scriptversion=2018-03-07.03; # UTC
+
+# Copyright (C) 1995-2021 Free Software Foundation, Inc.
+# written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, June 1995
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# This file is maintained in Automake, please report
+# bugs to <bug-automake@gnu.org> or send patches to
+# <automake-patches@gnu.org>.
+
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+  emulate sh
+  NULLCMD=:
+  # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+fi
+
+case $1 in
+  '')
+     echo "$0: No file.  Try '$0 --help' for more information." 1>&2
+     exit 1;
+     ;;
+  -h | --h*)
+    cat <<\EOF
+Usage: mdate-sh [--help] [--version] FILE
+
+Pretty-print the modification day of FILE, in the format:
+1 January 1970
+
+Report bugs to <bug-automake@gnu.org>.
+EOF
+    exit $?
+    ;;
+  -v | --v*)
+    echo "mdate-sh $scriptversion"
+    exit $?
+    ;;
+esac
+
+error ()
+{
+  echo "$0: $1" >&2
+  exit 1
+}
+
+
+# Prevent date giving response in another language.
+LANG=C
+export LANG
+LC_ALL=C
+export LC_ALL
+LC_TIME=C
+export LC_TIME
+
+# Use UTC to get reproducible result.
+TZ=UTC0
+export TZ
+
+# GNU ls changes its time format in response to the TIME_STYLE
+# variable.  Since we cannot assume 'unset' works, revert this
+# variable to its documented default.
+if test "${TIME_STYLE+set}" = set; then
+  TIME_STYLE=posix-long-iso
+  export TIME_STYLE
+fi
+
+save_arg1=$1
+
+# Find out how to get the extended ls output of a file or directory.
+if ls -L /dev/null 1>/dev/null 2>&1; then
+  ls_command='ls -L -l -d'
+else
+  ls_command='ls -l -d'
+fi
+# Avoid user/group names that might have spaces, when possible.
+if ls -n /dev/null 1>/dev/null 2>&1; then
+  ls_command="$ls_command -n"
+fi
+
+# A 'ls -l' line looks as follows on OS/2.
+#  drwxrwx---        0 Aug 11  2001 foo
+# This differs from Unix, which adds ownership information.
+#  drwxrwx---   2 root  root      4096 Aug 11  2001 foo
+#
+# To find the date, we split the line on spaces and iterate on words
+# until we find a month.  This cannot work with files whose owner is a
+# user named "Jan", or "Feb", etc.  However, it's unlikely that '/'
+# will be owned by a user whose name is a month.  So we first look at
+# the extended ls output of the root directory to decide how many
+# words should be skipped to get the date.
+
+# On HPUX /bin/sh, "set" interprets "-rw-r--r--" as options, so the "x" below.
+set x`$ls_command /`
+
+# Find which argument is the month.
+month=
+command=
+until test $month
+do
+  test $# -gt 0 || error "failed parsing '$ls_command /' output"
+  shift
+  # Add another shift to the command.
+  command="$command shift;"
+  case $1 in
+    Jan) month=January; nummonth=1;;
+    Feb) month=February; nummonth=2;;
+    Mar) month=March; nummonth=3;;
+    Apr) month=April; nummonth=4;;
+    May) month=May; nummonth=5;;
+    Jun) month=June; nummonth=6;;
+    Jul) month=July; nummonth=7;;
+    Aug) month=August; nummonth=8;;
+    Sep) month=September; nummonth=9;;
+    Oct) month=October; nummonth=10;;
+    Nov) month=November; nummonth=11;;
+    Dec) month=December; nummonth=12;;
+  esac
+done
+
+test -n "$month" || error "failed parsing '$ls_command /' output"
+
+# Get the extended ls output of the file or directory.
+set dummy x`eval "$ls_command \"\\\$save_arg1\""`
+
+# Remove all preceding arguments
+eval $command
+
+# Because of the dummy argument above, month is in $2.
+#
+# On a POSIX system, we should have
+#
+# $# = 5
+# $1 = file size
+# $2 = month
+# $3 = day
+# $4 = year or time
+# $5 = filename
+#
+# On Darwin 7.7.0 and 7.6.0, we have
+#
+# $# = 4
+# $1 = day
+# $2 = month
+# $3 = year or time
+# $4 = filename
+
+# Get the month.
+case $2 in
+  Jan) month=January; nummonth=1;;
+  Feb) month=February; nummonth=2;;
+  Mar) month=March; nummonth=3;;
+  Apr) month=April; nummonth=4;;
+  May) month=May; nummonth=5;;
+  Jun) month=June; nummonth=6;;
+  Jul) month=July; nummonth=7;;
+  Aug) month=August; nummonth=8;;
+  Sep) month=September; nummonth=9;;
+  Oct) month=October; nummonth=10;;
+  Nov) month=November; nummonth=11;;
+  Dec) month=December; nummonth=12;;
+esac
+
+case $3 in
+  ???*) day=$1;;
+  *) day=$3; shift;;
+esac
+
+# Here we have to deal with the problem that the ls output gives either
+# the time of day or the year.
+case $3 in
+  *:*) set `date`; eval year=\$$#
+       case $2 in
+	 Jan) nummonthtod=1;;
+	 Feb) nummonthtod=2;;
+	 Mar) nummonthtod=3;;
+	 Apr) nummonthtod=4;;
+	 May) nummonthtod=5;;
+	 Jun) nummonthtod=6;;
+	 Jul) nummonthtod=7;;
+	 Aug) nummonthtod=8;;
+	 Sep) nummonthtod=9;;
+	 Oct) nummonthtod=10;;
+	 Nov) nummonthtod=11;;
+	 Dec) nummonthtod=12;;
+       esac
+       # For the first six month of the year the time notation can also
+       # be used for files modified in the last year.
+       if (expr $nummonth \> $nummonthtod) > /dev/null;
+       then
+	 year=`expr $year - 1`
+       fi;;
+  *) year=$3;;
+esac
+
+# The result.
+echo $day $month $year
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/src/grep/build-aux/missing b/src/grep/build-aux/missing
new file mode 100755
index 0000000..1fe1611
--- /dev/null
+++ b/src/grep/build-aux/missing
@@ -0,0 +1,215 @@
+#! /bin/sh
+# Common wrapper for a few potentially missing GNU programs.
+
+scriptversion=2018-03-07.03; # UTC
+
+# Copyright (C) 1996-2021 Free Software Foundation, Inc.
+# Originally written by Fran,cois Pinard <pinard@iro.umontreal.ca>, 1996.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+if test $# -eq 0; then
+  echo 1>&2 "Try '$0 --help' for more information"
+  exit 1
+fi
+
+case $1 in
+
+  --is-lightweight)
+    # Used by our autoconf macros to check whether the available missing
+    # script is modern enough.
+    exit 0
+    ;;
+
+  --run)
+    # Back-compat with the calling convention used by older automake.
+    shift
+    ;;
+
+  -h|--h|--he|--hel|--help)
+    echo "\
+$0 [OPTION]... PROGRAM [ARGUMENT]...
+
+Run 'PROGRAM [ARGUMENT]...', returning a proper advice when this fails due
+to PROGRAM being missing or too old.
+
+Options:
+  -h, --help      display this help and exit
+  -v, --version   output version information and exit
+
+Supported PROGRAM values:
+  aclocal   autoconf  autoheader   autom4te  automake  makeinfo
+  bison     yacc      flex         lex       help2man
+
+Version suffixes to PROGRAM as well as the prefixes 'gnu-', 'gnu', and
+'g' are ignored when checking the name.
+
+Send bug reports to <bug-automake@gnu.org>."
+    exit $?
+    ;;
+
+  -v|--v|--ve|--ver|--vers|--versi|--versio|--version)
+    echo "missing $scriptversion (GNU Automake)"
+    exit $?
+    ;;
+
+  -*)
+    echo 1>&2 "$0: unknown '$1' option"
+    echo 1>&2 "Try '$0 --help' for more information"
+    exit 1
+    ;;
+
+esac
+
+# Run the given program, remember its exit status.
+"$@"; st=$?
+
+# If it succeeded, we are done.
+test $st -eq 0 && exit 0
+
+# Also exit now if we it failed (or wasn't found), and '--version' was
+# passed; such an option is passed most likely to detect whether the
+# program is present and works.
+case $2 in --version|--help) exit $st;; esac
+
+# Exit code 63 means version mismatch.  This often happens when the user
+# tries to use an ancient version of a tool on a file that requires a
+# minimum version.
+if test $st -eq 63; then
+  msg="probably too old"
+elif test $st -eq 127; then
+  # Program was missing.
+  msg="missing on your system"
+else
+  # Program was found and executed, but failed.  Give up.
+  exit $st
+fi
+
+perl_URL=https://www.perl.org/
+flex_URL=https://github.com/westes/flex
+gnu_software_URL=https://www.gnu.org/software
+
+program_details ()
+{
+  case $1 in
+    aclocal|automake)
+      echo "The '$1' program is part of the GNU Automake package:"
+      echo "<$gnu_software_URL/automake>"
+      echo "It also requires GNU Autoconf, GNU m4 and Perl in order to run:"
+      echo "<$gnu_software_URL/autoconf>"
+      echo "<$gnu_software_URL/m4/>"
+      echo "<$perl_URL>"
+      ;;
+    autoconf|autom4te|autoheader)
+      echo "The '$1' program is part of the GNU Autoconf package:"
+      echo "<$gnu_software_URL/autoconf/>"
+      echo "It also requires GNU m4 and Perl in order to run:"
+      echo "<$gnu_software_URL/m4/>"
+      echo "<$perl_URL>"
+      ;;
+  esac
+}
+
+give_advice ()
+{
+  # Normalize program name to check for.
+  normalized_program=`echo "$1" | sed '
+    s/^gnu-//; t
+    s/^gnu//; t
+    s/^g//; t'`
+
+  printf '%s\n' "'$1' is $msg."
+
+  configure_deps="'configure.ac' or m4 files included by 'configure.ac'"
+  case $normalized_program in
+    autoconf*)
+      echo "You should only need it if you modified 'configure.ac',"
+      echo "or m4 files included by it."
+      program_details 'autoconf'
+      ;;
+    autoheader*)
+      echo "You should only need it if you modified 'acconfig.h' or"
+      echo "$configure_deps."
+      program_details 'autoheader'
+      ;;
+    automake*)
+      echo "You should only need it if you modified 'Makefile.am' or"
+      echo "$configure_deps."
+      program_details 'automake'
+      ;;
+    aclocal*)
+      echo "You should only need it if you modified 'acinclude.m4' or"
+      echo "$configure_deps."
+      program_details 'aclocal'
+      ;;
+   autom4te*)
+      echo "You might have modified some maintainer files that require"
+      echo "the 'autom4te' program to be rebuilt."
+      program_details 'autom4te'
+      ;;
+    bison*|yacc*)
+      echo "You should only need it if you modified a '.y' file."
+      echo "You may want to install the GNU Bison package:"
+      echo "<$gnu_software_URL/bison/>"
+      ;;
+    lex*|flex*)
+      echo "You should only need it if you modified a '.l' file."
+      echo "You may want to install the Fast Lexical Analyzer package:"
+      echo "<$flex_URL>"
+      ;;
+    help2man*)
+      echo "You should only need it if you modified a dependency" \
+           "of a man page."
+      echo "You may want to install the GNU Help2man package:"
+      echo "<$gnu_software_URL/help2man/>"
+    ;;
+    makeinfo*)
+      echo "You should only need it if you modified a '.texi' file, or"
+      echo "any other file indirectly affecting the aspect of the manual."
+      echo "You might want to install the Texinfo package:"
+      echo "<$gnu_software_URL/texinfo/>"
+      echo "The spurious makeinfo call might also be the consequence of"
+      echo "using a buggy 'make' (AIX, DU, IRIX), in which case you might"
+      echo "want to install GNU make:"
+      echo "<$gnu_software_URL/make/>"
+      ;;
+    *)
+      echo "You might have modified some files without having the proper"
+      echo "tools for further handling them.  Check the 'README' file, it"
+      echo "often tells you about the needed prerequisites for installing"
+      echo "this package.  You may also peek at any GNU archive site, in"
+      echo "case some other package contains this missing '$1' program."
+      ;;
+  esac
+}
+
+give_advice "$1" | sed -e '1s/^/WARNING: /' \
+                       -e '2,$s/^/         /' >&2
+
+# Propagate the correct exit status (expected to be 127 for a program
+# not found, 63 for a program that failed due to version mismatch).
+exit $st
+
+# Local variables:
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/src/grep/build-aux/test-driver b/src/grep/build-aux/test-driver
new file mode 100755
index 0000000..be73b80
--- /dev/null
+++ b/src/grep/build-aux/test-driver
@@ -0,0 +1,153 @@
+#! /bin/sh
+# test-driver - basic testsuite driver script.
+
+scriptversion=2018-03-07.03; # UTC
+
+# Copyright (C) 2011-2021 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# This file is maintained in Automake, please report
+# bugs to <bug-automake@gnu.org> or send patches to
+# <automake-patches@gnu.org>.
+
+# Make unconditional expansion of undefined variables an error.  This
+# helps a lot in preventing typo-related bugs.
+set -u
+
+usage_error ()
+{
+  echo "$0: $*" >&2
+  print_usage >&2
+  exit 2
+}
+
+print_usage ()
+{
+  cat <<END
+Usage:
+  test-driver --test-name NAME --log-file PATH --trs-file PATH
+              [--expect-failure {yes|no}] [--color-tests {yes|no}]
+              [--enable-hard-errors {yes|no}] [--]
+              TEST-SCRIPT [TEST-SCRIPT-ARGUMENTS]
+
+The '--test-name', '--log-file' and '--trs-file' options are mandatory.
+See the GNU Automake documentation for information.
+END
+}
+
+test_name= # Used for reporting.
+log_file=  # Where to save the output of the test script.
+trs_file=  # Where to save the metadata of the test run.
+expect_failure=no
+color_tests=no
+enable_hard_errors=yes
+while test $# -gt 0; do
+  case $1 in
+  --help) print_usage; exit $?;;
+  --version) echo "test-driver $scriptversion"; exit $?;;
+  --test-name) test_name=$2; shift;;
+  --log-file) log_file=$2; shift;;
+  --trs-file) trs_file=$2; shift;;
+  --color-tests) color_tests=$2; shift;;
+  --expect-failure) expect_failure=$2; shift;;
+  --enable-hard-errors) enable_hard_errors=$2; shift;;
+  --) shift; break;;
+  -*) usage_error "invalid option: '$1'";;
+   *) break;;
+  esac
+  shift
+done
+
+missing_opts=
+test x"$test_name" = x && missing_opts="$missing_opts --test-name"
+test x"$log_file"  = x && missing_opts="$missing_opts --log-file"
+test x"$trs_file"  = x && missing_opts="$missing_opts --trs-file"
+if test x"$missing_opts" != x; then
+  usage_error "the following mandatory options are missing:$missing_opts"
+fi
+
+if test $# -eq 0; then
+  usage_error "missing argument"
+fi
+
+if test $color_tests = yes; then
+  # Keep this in sync with 'lib/am/check.am:$(am__tty_colors)'.
+  red='' # Red.
+  grn='' # Green.
+  lgn='' # Light green.
+  blu='' # Blue.
+  mgn='' # Magenta.
+  std=''     # No color.
+else
+  red= grn= lgn= blu= mgn= std=
+fi
+
+do_exit='rm -f $log_file $trs_file; (exit $st); exit $st'
+trap "st=129; $do_exit" 1
+trap "st=130; $do_exit" 2
+trap "st=141; $do_exit" 13
+trap "st=143; $do_exit" 15
+
+# Test script is run here. We create the file first, then append to it,
+# to ameliorate tests themselves also writing to the log file. Our tests
+# don't, but others can (automake bug#35762).
+: >"$log_file"
+"$@" >>"$log_file" 2>&1
+estatus=$?
+
+if test $enable_hard_errors = no && test $estatus -eq 99; then
+  tweaked_estatus=1
+else
+  tweaked_estatus=$estatus
+fi
+
+case $tweaked_estatus:$expect_failure in
+  0:yes) col=$red res=XPASS recheck=yes gcopy=yes;;
+  0:*)   col=$grn res=PASS  recheck=no  gcopy=no;;
+  77:*)  col=$blu res=SKIP  recheck=no  gcopy=yes;;
+  99:*)  col=$mgn res=ERROR recheck=yes gcopy=yes;;
+  *:yes) col=$lgn res=XFAIL recheck=no  gcopy=yes;;
+  *:*)   col=$red res=FAIL  recheck=yes gcopy=yes;;
+esac
+
+# Report the test outcome and exit status in the logs, so that one can
+# know whether the test passed or failed simply by looking at the '.log'
+# file, without the need of also peaking into the corresponding '.trs'
+# file (automake bug#11814).
+echo "$res $test_name (exit status: $estatus)" >>"$log_file"
+
+# Report outcome to console.
+echo "${col}${res}${std}: $test_name"
+
+# Register the test result, and other relevant metadata.
+echo ":test-result: $res" > $trs_file
+echo ":global-test-result: $res" >> $trs_file
+echo ":recheck: $recheck" >> $trs_file
+echo ":copy-in-global-log: $gcopy" >> $trs_file
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/src/grep/build-aux/texinfo.tex b/src/grep/build-aux/texinfo.tex
new file mode 100644
index 0000000..e48383d
--- /dev/null
+++ b/src/grep/build-aux/texinfo.tex
@@ -0,0 +1,11612 @@
+% texinfo.tex -- TeX macros to handle Texinfo files.
+%
+% Load plain if necessary, i.e., if running under initex.
+\expandafter\ifx\csname fmtname\endcsname\relax\input plain\fi
+%
+\def\texinfoversion{2021-04-25.21}
+%
+% Copyright 1985, 1986, 1988, 1990-2021 Free Software Foundation, Inc.
+%
+% This texinfo.tex file is free software: you can redistribute it and/or
+% modify it under the terms of the GNU General Public License as
+% published by the Free Software Foundation, either version 3 of the
+% License, or (at your option) any later version.
+%
+% This texinfo.tex file is distributed in the hope that it will be
+% useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+% of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+% General Public License for more details.
+%
+% You should have received a copy of the GNU General Public License
+% along with this program.  If not, see <https://www.gnu.org/licenses/>.
+%
+% As a special exception, when this file is read by TeX when processing
+% a Texinfo source document, you may use the result without
+% restriction. This Exception is an additional permission under section 7
+% of the GNU General Public License, version 3 ("GPLv3").
+%
+% Please try the latest version of texinfo.tex before submitting bug
+% reports; you can get the latest version from:
+%   https://ftp.gnu.org/gnu/texinfo/ (the Texinfo release area), or
+%   https://ftpmirror.gnu.org/texinfo/ (same, via a mirror), or
+%   https://www.gnu.org/software/texinfo/ (the Texinfo home page)
+% The texinfo.tex in any given distribution could well be out
+% of date, so if that's what you're using, please check.
+%
+% Send bug reports to bug-texinfo@gnu.org.  Please include a
+% complete document in each bug report with which we can reproduce the
+% problem.  Patches are, of course, greatly appreciated.
+%
+% To process a Texinfo manual with TeX, it's most reliable to use the
+% texi2dvi shell script that comes with the distribution.  For a simple
+% manual foo.texi, however, you can get away with this:
+%   tex foo.texi
+%   texindex foo.??
+%   tex foo.texi
+%   tex foo.texi
+%   dvips foo.dvi -o  # or whatever; this makes foo.ps.
+% The extra TeX runs get the cross-reference information correct.
+% Sometimes one run after texindex suffices, and sometimes you need more
+% than two; texi2dvi does it as many times as necessary.
+%
+% It is possible to adapt texinfo.tex for other languages, to some
+% extent.  You can get the existing language-specific files from the
+% full Texinfo distribution.
+%
+% The GNU Texinfo home page is https://www.gnu.org/software/texinfo.
+
+
+\message{Loading texinfo [version \texinfoversion]:}
+
+% If in a .fmt file, print the version number
+% and turn on active characters that we couldn't do earlier because
+% they might have appeared in the input file name.
+\everyjob{\message{[Texinfo version \texinfoversion]}%
+  \catcode`+=\active \catcode`\_=\active}
+
+% LaTeX's \typeout.  This ensures that the messages it is used for
+% are identical in format to the corresponding ones from latex/pdflatex.
+\def\typeout{\immediate\write17}%
+
+\chardef\other=12
+
+% We never want plain's \outer definition of \+ in Texinfo.
+% For @tex, we can use \tabalign.
+\let\+ = \relax
+
+% Save some plain tex macros whose names we will redefine.
+\let\ptexb=\b
+\let\ptexbullet=\bullet
+\let\ptexc=\c
+\let\ptexcomma=\,
+\let\ptexdot=\.
+\let\ptexdots=\dots
+\let\ptexend=\end
+\let\ptexequiv=\equiv
+\let\ptexexclam=\!
+\let\ptexfootnote=\footnote
+\let\ptexgtr=>
+\let\ptexhat=^
+\let\ptexi=\i
+\let\ptexindent=\indent
+\let\ptexinsert=\insert
+\let\ptexlbrace=\{
+\let\ptexless=<
+\let\ptexnewwrite\newwrite
+\let\ptexnoindent=\noindent
+\let\ptexplus=+
+\let\ptexraggedright=\raggedright
+\let\ptexrbrace=\}
+\let\ptexslash=\/
+\let\ptexsp=\sp
+\let\ptexstar=\*
+\let\ptexsup=\sup
+\let\ptext=\t
+\let\ptextop=\top
+{\catcode`\'=\active \global\let\ptexquoteright'}% active in plain's math mode
+
+% If this character appears in an error message or help string, it
+% starts a new line in the output.
+\newlinechar = `^^J
+
+% Use TeX 3.0's \inputlineno to get the line number, for better error
+% messages, but if we're using an old version of TeX, don't do anything.
+%
+\ifx\inputlineno\thisisundefined
+  \let\linenumber = \empty % Pre-3.0.
+\else
+  \def\linenumber{l.\the\inputlineno:\space}
+\fi
+
+% Set up fixed words for English if not already set.
+\ifx\putwordAppendix\undefined  \gdef\putwordAppendix{Appendix}\fi
+\ifx\putwordChapter\undefined   \gdef\putwordChapter{Chapter}\fi
+\ifx\putworderror\undefined     \gdef\putworderror{error}\fi
+\ifx\putwordfile\undefined      \gdef\putwordfile{file}\fi
+\ifx\putwordin\undefined        \gdef\putwordin{in}\fi
+\ifx\putwordIndexIsEmpty\undefined       \gdef\putwordIndexIsEmpty{(Index is empty)}\fi
+\ifx\putwordIndexNonexistent\undefined   \gdef\putwordIndexNonexistent{(Index is nonexistent)}\fi
+\ifx\putwordInfo\undefined      \gdef\putwordInfo{Info}\fi
+\ifx\putwordInstanceVariableof\undefined \gdef\putwordInstanceVariableof{Instance Variable of}\fi
+\ifx\putwordMethodon\undefined  \gdef\putwordMethodon{Method on}\fi
+\ifx\putwordNoTitle\undefined   \gdef\putwordNoTitle{No Title}\fi
+\ifx\putwordof\undefined        \gdef\putwordof{of}\fi
+\ifx\putwordon\undefined        \gdef\putwordon{on}\fi
+\ifx\putwordpage\undefined      \gdef\putwordpage{page}\fi
+\ifx\putwordsection\undefined   \gdef\putwordsection{section}\fi
+\ifx\putwordSection\undefined   \gdef\putwordSection{Section}\fi
+\ifx\putwordsee\undefined       \gdef\putwordsee{see}\fi
+\ifx\putwordSee\undefined       \gdef\putwordSee{See}\fi
+\ifx\putwordShortTOC\undefined  \gdef\putwordShortTOC{Short Contents}\fi
+\ifx\putwordTOC\undefined       \gdef\putwordTOC{Table of Contents}\fi
+%
+\ifx\putwordMJan\undefined \gdef\putwordMJan{January}\fi
+\ifx\putwordMFeb\undefined \gdef\putwordMFeb{February}\fi
+\ifx\putwordMMar\undefined \gdef\putwordMMar{March}\fi
+\ifx\putwordMApr\undefined \gdef\putwordMApr{April}\fi
+\ifx\putwordMMay\undefined \gdef\putwordMMay{May}\fi
+\ifx\putwordMJun\undefined \gdef\putwordMJun{June}\fi
+\ifx\putwordMJul\undefined \gdef\putwordMJul{July}\fi
+\ifx\putwordMAug\undefined \gdef\putwordMAug{August}\fi
+\ifx\putwordMSep\undefined \gdef\putwordMSep{September}\fi
+\ifx\putwordMOct\undefined \gdef\putwordMOct{October}\fi
+\ifx\putwordMNov\undefined \gdef\putwordMNov{November}\fi
+\ifx\putwordMDec\undefined \gdef\putwordMDec{December}\fi
+%
+\ifx\putwordDefmac\undefined    \gdef\putwordDefmac{Macro}\fi
+\ifx\putwordDefspec\undefined   \gdef\putwordDefspec{Special Form}\fi
+\ifx\putwordDefvar\undefined    \gdef\putwordDefvar{Variable}\fi
+\ifx\putwordDefopt\undefined    \gdef\putwordDefopt{User Option}\fi
+\ifx\putwordDeffunc\undefined   \gdef\putwordDeffunc{Function}\fi
+
+% Give the space character the catcode for a space.
+\def\spaceisspace{\catcode`\ =10\relax}
+
+% Likewise for ^^M, the end of line character.
+\def\endlineisspace{\catcode13=10\relax}
+
+\chardef\dashChar  = `\-
+\chardef\slashChar = `\/
+\chardef\underChar = `\_
+
+% Ignore a token.
+%
+\def\gobble#1{}
+
+% The following is used inside several \edef's.
+\def\makecsname#1{\expandafter\noexpand\csname#1\endcsname}
+
+% Hyphenation fixes.
+\hyphenation{
+  Flor-i-da Ghost-script Ghost-view Mac-OS Post-Script
+  ap-pen-dix bit-map bit-maps
+  data-base data-bases eshell fall-ing half-way long-est man-u-script
+  man-u-scripts mini-buf-fer mini-buf-fers over-view par-a-digm
+  par-a-digms rath-er rec-tan-gu-lar ro-bot-ics se-vere-ly set-up spa-ces
+  spell-ing spell-ings
+  stand-alone strong-est time-stamp time-stamps which-ever white-space
+  wide-spread wrap-around
+}
+
+% Sometimes it is convenient to have everything in the transcript file
+% and nothing on the terminal.  We don't just call \tracingall here,
+% since that produces some useless output on the terminal.  We also make
+% some effort to order the tracing commands to reduce output in the log
+% file; cf. trace.sty in LaTeX.
+%
+\def\gloggingall{\begingroup \globaldefs = 1 \loggingall \endgroup}%
+\def\loggingall{%
+  \tracingstats2
+  \tracingpages1
+  \tracinglostchars2  % 2 gives us more in etex
+  \tracingparagraphs1
+  \tracingoutput1
+  \tracingmacros2
+  \tracingrestores1
+  \showboxbreadth\maxdimen \showboxdepth\maxdimen
+  \ifx\eTeXversion\thisisundefined\else % etex gives us more logging
+    \tracingscantokens1
+    \tracingifs1
+    \tracinggroups1
+    \tracingnesting2
+    \tracingassigns1
+  \fi
+  \tracingcommands3  % 3 gives us more in etex
+  \errorcontextlines16
+}%
+
+% @errormsg{MSG}.  Do the index-like expansions on MSG, but if things
+% aren't perfect, it's not the end of the world, being an error message,
+% after all.
+%
+\def\errormsg{\begingroup \indexnofonts \doerrormsg}
+\def\doerrormsg#1{\errmessage{#1}}
+
+% add check for \lastpenalty to plain's definitions.  If the last thing
+% we did was a \nobreak, we don't want to insert more space.
+%
+\def\smallbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\smallskipamount
+  \removelastskip\penalty-50\smallskip\fi\fi}
+\def\medbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\medskipamount
+  \removelastskip\penalty-100\medskip\fi\fi}
+\def\bigbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\bigskipamount
+  \removelastskip\penalty-200\bigskip\fi\fi}
+
+% Output routine
+%
+
+% For a final copy, take out the rectangles
+% that mark overfull boxes (in case you have decided
+% that the text looks ok even though it passes the margin).
+%
+\def\finalout{\overfullrule=0pt }
+
+\newdimen\outerhsize \newdimen\outervsize % set by the paper size routines
+\newdimen\topandbottommargin \topandbottommargin=.75in
+
+% Output a mark which sets \thischapter, \thissection and \thiscolor.
+% We dump everything together because we only have one kind of mark.
+% This works because we only use \botmark / \topmark, not \firstmark.
+%
+% A mark contains a subexpression of the \ifcase ... \fi construct.
+% \get*marks macros below extract the needed part using \ifcase.
+%
+% Another complication is to let the user choose whether \thischapter
+% (\thissection) refers to the chapter (section) in effect at the top
+% of a page, or that at the bottom of a page.
+
+% \domark is called twice inside \chapmacro, to add one
+% mark before the section break, and one after.
+%   In the second call \prevchapterdefs is the same as \currentchapterdefs,
+% and \prevsectiondefs is the same as \currentsectiondefs.
+%   Then if the page is not broken at the mark, some of the previous
+% section appears on the page, and we can get the name of this section
+% from \firstmark for @everyheadingmarks top.
+%   @everyheadingmarks bottom uses \botmark.
+%
+% See page 260 of The TeXbook.
+\def\domark{%
+  \toks0=\expandafter{\currentchapterdefs}%
+  \toks2=\expandafter{\currentsectiondefs}%
+  \toks4=\expandafter{\prevchapterdefs}%
+  \toks6=\expandafter{\prevsectiondefs}%
+  \toks8=\expandafter{\currentcolordefs}%
+  \mark{%
+                   \the\toks0 \the\toks2  % 0: marks for @everyheadingmarks top
+      \noexpand\or \the\toks4 \the\toks6  % 1: for @everyheadingmarks bottom
+    \noexpand\else \the\toks8             % 2: color marks
+  }%
+}
+
+% \gettopheadingmarks, \getbottomheadingmarks,
+% \getcolormarks - extract needed part of mark.
+%
+% \topmark doesn't work for the very first chapter (after the title
+% page or the contents), so we use \firstmark there -- this gets us
+% the mark with the chapter defs, unless the user sneaks in, e.g.,
+% @setcolor (or @url, or @link, etc.) between @contents and the very
+% first @chapter.
+\def\gettopheadingmarks{%
+  \ifcase0\the\savedtopmark\fi
+  \ifx\thischapter\empty \ifcase0\firstmark\fi \fi
+}
+\def\getbottomheadingmarks{\ifcase1\botmark\fi}
+\def\getcolormarks{\ifcase2\the\savedtopmark\fi}
+
+% Avoid "undefined control sequence" errors.
+\def\currentchapterdefs{}
+\def\currentsectiondefs{}
+\def\currentsection{}
+\def\prevchapterdefs{}
+\def\prevsectiondefs{}
+\def\currentcolordefs{}
+
+% Margin to add to right of even pages, to left of odd pages.
+\newdimen\bindingoffset
+\newdimen\normaloffset
+\newdimen\txipagewidth \newdimen\txipageheight
+
+% Main output routine.
+%
+\chardef\PAGE = 255
+\newtoks\defaultoutput
+\defaultoutput = {\savetopmark\onepageout{\pagecontents\PAGE}}
+\output=\expandafter{\the\defaultoutput}
+
+\newbox\headlinebox
+\newbox\footlinebox
+
+% When outputting the double column layout for indices, an output routine
+% is run several times, which hides the original value of \topmark.  This
+% can lead to a page heading being output and duplicating the chapter heading
+% of the index.  Hence, save the contents of \topmark at the beginning of
+% the output routine.  The saved contents are valid until we actually
+% \shipout a page.
+%
+% (We used to run a short output routine to actually set \topmark and
+% \firstmark to the right values, but if this was called with an empty page
+% containing whatsits for writing index entries, the whatsits would be thrown
+% away and the index auxiliary file would remain empty.)
+%
+\newtoks\savedtopmark
+\newif\iftopmarksaved
+\topmarksavedtrue
+\def\savetopmark{%
+  \iftopmarksaved\else
+    \global\savedtopmark=\expandafter{\topmark}%
+    \global\topmarksavedtrue
+  \fi
+}
+
+% \onepageout takes a vbox as an argument.
+% \shipout a vbox for a single page, adding an optional header, footer
+% and footnote.  This also causes index entries for this page to be written
+% to the auxiliary files.
+%
+\def\onepageout#1{%
+  \hoffset=\normaloffset
+  %
+  \ifodd\pageno  \advance\hoffset by \bindingoffset
+  \else \advance\hoffset by -\bindingoffset\fi
+  %
+  \checkchapterpage
+  %
+  % Retrieve the information for the headings from the marks in the page,
+  % and call Plain TeX's \makeheadline and \makefootline, which use the
+  % values in \headline and \footline.
+  %
+  % Common context changes for both heading and footing.
+  % Do this outside of the \shipout so @code etc. will be expanded in
+  % the headline as they should be, not taken literally (outputting ''code).
+  \def\commonheadfootline{\let\hsize=\txipagewidth \texinfochars}
+  %
+  \ifodd\pageno \getoddheadingmarks \else \getevenheadingmarks \fi
+  \global\setbox\headlinebox = \vbox{\commonheadfootline \makeheadline}%
+  \ifodd\pageno \getoddfootingmarks \else \getevenfootingmarks \fi
+  \global\setbox\footlinebox = \vbox{\commonheadfootline \makefootline}%
+  %
+  {%
+    % Set context for writing to auxiliary files like index files.
+    % Have to do this stuff outside the \shipout because we want it to
+    % take effect in \write's, yet the group defined by the \vbox ends
+    % before the \shipout runs.
+    %
+    \atdummies         % don't expand commands in the output.
+    \turnoffactive
+    \shipout\vbox{%
+      % Do this early so pdf references go to the beginning of the page.
+      \ifpdfmakepagedest \pdfdest name{\the\pageno} xyz\fi
+      %
+      \unvbox\headlinebox
+      \pagebody{#1}%
+      \ifdim\ht\footlinebox > 0pt
+        % Only leave this space if the footline is nonempty.
+        % (We lessened \vsize for it in \oddfootingyyy.)
+        % The \baselineskip=24pt in plain's \makefootline has no effect.
+        \vskip 24pt
+        \unvbox\footlinebox
+      \fi
+      %
+    }%
+  }%
+  \global\topmarksavedfalse
+  \advancepageno
+  \ifnum\outputpenalty>-20000 \else\dosupereject\fi
+}
+
+\newinsert\margin \dimen\margin=\maxdimen
+
+% Main part of page, including any footnotes
+\def\pagebody#1{\vbox to\txipageheight{\boxmaxdepth=\maxdepth #1}}
+{\catcode`\@ =11
+\gdef\pagecontents#1{\ifvoid\topins\else\unvbox\topins\fi
+% marginal hacks, juha@viisa.uucp (Juha Takala)
+\ifvoid\margin\else % marginal info is present
+  \rlap{\kern\hsize\vbox to\z@{\kern1pt\box\margin \vss}}\fi
+\dimen@=\dp#1\relax \unvbox#1\relax
+\ifvoid\footins\else\vskip\skip\footins\footnoterule \unvbox\footins\fi
+\ifr@ggedbottom \kern-\dimen@ \vfil \fi}
+}
+
+% Check if we are on the first page of a chapter.  Used for printing headings.
+\newif\ifchapterpage
+\def\checkchapterpage{%
+  % Get the chapter that was current at the end of the last page
+  \ifcase1\the\savedtopmark\fi
+  \let\prevchaptername\thischaptername
+  %
+  \ifodd\pageno \getoddheadingmarks \else \getevenheadingmarks \fi
+  \let\curchaptername\thischaptername
+  %
+  \ifx\curchaptername\prevchaptername
+    \chapterpagefalse
+  \else
+    \chapterpagetrue
+  \fi
+}
+
+% Argument parsing
+
+% Parse an argument, then pass it to #1.  The argument is the rest of
+% the input line (except we remove a trailing comment).  #1 should be a
+% macro which expects an ordinary undelimited TeX argument.
+% For example, \def\foo{\parsearg\fooxxx}.
+%
+\def\parsearg{\parseargusing{}}
+\def\parseargusing#1#2{%
+  \def\argtorun{#2}%
+  \begingroup
+    \obeylines
+    \spaceisspace
+    #1%
+    \parseargline\empty% Insert the \empty token, see \finishparsearg below.
+}
+
+{\obeylines %
+  \gdef\parseargline#1^^M{%
+    \endgroup % End of the group started in \parsearg.
+    \argremovecomment #1\comment\ArgTerm%
+  }%
+}
+
+% First remove any @comment, then any @c comment.  Pass the result on to
+% \argcheckspaces.
+\def\argremovecomment#1\comment#2\ArgTerm{\argremovec #1\c\ArgTerm}
+\def\argremovec#1\c#2\ArgTerm{\argcheckspaces#1\^^M\ArgTerm}
+
+% Each occurrence of `\^^M' or `<space>\^^M' is replaced by a single space.
+%
+% \argremovec might leave us with trailing space, e.g.,
+%    @end itemize  @c foo
+% This space token undergoes the same procedure and is eventually removed
+% by \finishparsearg.
+%
+\def\argcheckspaces#1\^^M{\argcheckspacesX#1\^^M \^^M}
+\def\argcheckspacesX#1 \^^M{\argcheckspacesY#1\^^M}
+\def\argcheckspacesY#1\^^M#2\^^M#3\ArgTerm{%
+  \def\temp{#3}%
+  \ifx\temp\empty
+    % Do not use \next, perhaps the caller of \parsearg uses it; reuse \temp:
+    \let\temp\finishparsearg
+  \else
+    \let\temp\argcheckspaces
+  \fi
+  % Put the space token in:
+  \temp#1 #3\ArgTerm
+}
+
+% If a _delimited_ argument is enclosed in braces, they get stripped; so
+% to get _exactly_ the rest of the line, we had to prevent such situation.
+% We prepended an \empty token at the very beginning and we expand it now,
+% just before passing the control to \argtorun.
+% (Similarly, we have to think about #3 of \argcheckspacesY above: it is
+% either the null string, or it ends with \^^M---thus there is no danger
+% that a pair of braces would be stripped.
+%
+% But first, we have to remove the trailing space token.
+%
+\def\finishparsearg#1 \ArgTerm{\expandafter\argtorun\expandafter{#1}}
+
+
+% \parseargdef - define a command taking an argument on the line
+%
+% \parseargdef\foo{...}
+%	is roughly equivalent to
+% \def\foo{\parsearg\Xfoo}
+% \def\Xfoo#1{...}
+\def\parseargdef#1{%
+  \expandafter \doparseargdef \csname\string#1\endcsname #1%
+}
+\def\doparseargdef#1#2{%
+  \def#2{\parsearg#1}%
+  \def#1##1%
+}
+
+% Several utility definitions with active space:
+{
+  \obeyspaces
+  \gdef\obeyedspace{ }
+
+  % Make each space character in the input produce a normal interword
+  % space in the output.  Don't allow a line break at this space, as this
+  % is used only in environments like @example, where each line of input
+  % should produce a line of output anyway.
+  %
+  \gdef\sepspaces{\obeyspaces\let =\tie}
+
+  % If an index command is used in an @example environment, any spaces
+  % therein should become regular spaces in the raw index file, not the
+  % expansion of \tie (\leavevmode \penalty \@M \ ).
+  \gdef\unsepspaces{\let =\space}
+}
+
+
+\def\flushcr{\ifx\par\lisppar \def\next##1{}\else \let\next=\relax \fi \next}
+
+% Define the framework for environments in texinfo.tex.  It's used like this:
+%
+%   \envdef\foo{...}
+%   \def\Efoo{...}
+%
+% It's the responsibility of \envdef to insert \begingroup before the
+% actual body; @end closes the group after calling \Efoo.  \envdef also
+% defines \thisenv, so the current environment is known; @end checks
+% whether the environment name matches.  The \checkenv macro can also be
+% used to check whether the current environment is the one expected.
+%
+% Non-false conditionals (@iftex, @ifset) don't fit into this, so they
+% are not treated as environments; they don't open a group.  (The
+% implementation of @end takes care not to call \endgroup in this
+% special case.)
+
+
+% At run-time, environments start with this:
+\def\startenvironment#1{\begingroup\def\thisenv{#1}}
+% initialize
+\let\thisenv\empty
+
+% ... but they get defined via ``\envdef\foo{...}'':
+\long\def\envdef#1#2{\def#1{\startenvironment#1#2}}
+\def\envparseargdef#1#2{\parseargdef#1{\startenvironment#1#2}}
+
+% Check whether we're in the right environment:
+\def\checkenv#1{%
+  \def\temp{#1}%
+  \ifx\thisenv\temp
+  \else
+    \badenverr
+  \fi
+}
+
+% Environment mismatch, #1 expected:
+\def\badenverr{%
+  \errhelp = \EMsimple
+  \errmessage{This command can appear only \inenvironment\temp,
+    not \inenvironment\thisenv}%
+}
+\def\inenvironment#1{%
+  \ifx#1\empty
+    outside of any environment%
+  \else
+    in environment \expandafter\string#1%
+  \fi
+}
+
+
+% @end foo calls \checkenv and executes the definition of \Efoo.
+\parseargdef\end{%
+  \if 1\csname iscond.#1\endcsname
+  \else
+    % The general wording of \badenverr may not be ideal.
+    \expandafter\checkenv\csname#1\endcsname
+    \csname E#1\endcsname
+    \endgroup
+  \fi
+}
+
+\newhelp\EMsimple{Press RETURN to continue.}
+
+
+% Be sure we're in horizontal mode when doing a tie, since we make space
+% equivalent to this in @example-like environments. Otherwise, a space
+% at the beginning of a line will start with \penalty -- and
+% since \penalty is valid in vertical mode, we'd end up putting the
+% penalty on the vertical list instead of in the new paragraph.
+{\catcode`@ = 11
+ % Avoid using \@M directly, because that causes trouble
+ % if the definition is written into an index file.
+ \global\let\tiepenalty = \@M
+ \gdef\tie{\leavevmode\penalty\tiepenalty\ }
+}
+
+% @: forces normal size whitespace following.
+\def\:{\spacefactor=1000 }
+
+% @* forces a line break.
+\def\*{\unskip\hfil\break\hbox{}\ignorespaces}
+
+% @/ allows a line break.
+\let\/=\allowbreak
+
+% @. is an end-of-sentence period.
+\def\.{.\spacefactor=\endofsentencespacefactor\space}
+
+% @! is an end-of-sentence bang.
+\def\!{!\spacefactor=\endofsentencespacefactor\space}
+
+% @? is an end-of-sentence query.
+\def\?{?\spacefactor=\endofsentencespacefactor\space}
+
+% @frenchspacing on|off  says whether to put extra space after punctuation.
+%
+\def\onword{on}
+\def\offword{off}
+%
+\parseargdef\frenchspacing{%
+  \def\temp{#1}%
+  \ifx\temp\onword \plainfrenchspacing
+  \else\ifx\temp\offword \plainnonfrenchspacing
+  \else
+    \errhelp = \EMsimple
+    \errmessage{Unknown @frenchspacing option `\temp', must be on|off}%
+  \fi\fi
+}
+
+% @w prevents a word break.  Without the \leavevmode, @w at the
+% beginning of a paragraph, when TeX is still in vertical mode, would
+% produce a whole line of output instead of starting the paragraph.
+\def\w#1{\leavevmode\hbox{#1}}
+
+% @group ... @end group forces ... to be all on one page, by enclosing
+% it in a TeX vbox.  We use \vtop instead of \vbox to construct the box
+% to keep its height that of a normal line.  According to the rules for
+% \topskip (p.114 of the TeXbook), the glue inserted is
+% max (\topskip - \ht (first item), 0).  If that height is large,
+% therefore, no glue is inserted, and the space between the headline and
+% the text is small, which looks bad.
+%
+% Another complication is that the group might be very large.  This can
+% cause the glue on the previous page to be unduly stretched, because it
+% does not have much material.  In this case, it's better to add an
+% explicit \vfill so that the extra space is at the bottom.  The
+% threshold for doing this is if the group is more than \vfilllimit
+% percent of a page (\vfilllimit can be changed inside of @tex).
+%
+\newbox\groupbox
+\def\vfilllimit{0.7}
+%
+\envdef\group{%
+  \ifnum\catcode`\^^M=\active \else
+    \errhelp = \groupinvalidhelp
+    \errmessage{@group invalid in context where filling is enabled}%
+  \fi
+  \startsavinginserts
+  %
+  \setbox\groupbox = \vtop\bgroup
+    % Do @comment since we are called inside an environment such as
+    % @example, where each end-of-line in the input causes an
+    % end-of-line in the output.  We don't want the end-of-line after
+    % the `@group' to put extra space in the output.  Since @group
+    % should appear on a line by itself (according to the Texinfo
+    % manual), we don't worry about eating any user text.
+    \comment
+}
+%
+% The \vtop produces a box with normal height and large depth; thus, TeX puts
+% \baselineskip glue before it, and (when the next line of text is done)
+% \lineskip glue after it.  Thus, space below is not quite equal to space
+% above.  But it's pretty close.
+\def\Egroup{%
+    % To get correct interline space between the last line of the group
+    % and the first line afterwards, we have to propagate \prevdepth.
+    \endgraf % Not \par, as it may have been set to \lisppar.
+    \global\dimen1 = \prevdepth
+  \egroup           % End the \vtop.
+  \addgroupbox
+  \prevdepth = \dimen1
+  \checkinserts
+}
+
+\def\addgroupbox{
+  % \dimen0 is the vertical size of the group's box.
+  \dimen0 = \ht\groupbox  \advance\dimen0 by \dp\groupbox
+  % \dimen2 is how much space is left on the page (more or less).
+  \dimen2 = \txipageheight   \advance\dimen2 by -\pagetotal
+  % if the group doesn't fit on the current page, and it's a big big
+  % group, force a page break.
+  \ifdim \dimen0 > \dimen2
+    \ifdim \pagetotal < \vfilllimit\txipageheight
+      \page
+    \fi
+  \fi
+  \box\groupbox
+}
+
+%
+% TeX puts in an \escapechar (i.e., `@') at the beginning of the help
+% message, so this ends up printing `@group can only ...'.
+%
+\newhelp\groupinvalidhelp{%
+group can only be used in environments such as @example,^^J%
+where each line of input produces a line of output.}
+
+% @need space-in-mils
+% forces a page break if there is not space-in-mils remaining.
+
+\newdimen\mil  \mil=0.001in
+
+\parseargdef\need{%
+  % Ensure vertical mode, so we don't make a big box in the middle of a
+  % paragraph.
+  \par
+  %
+  % If the @need value is less than one line space, it's useless.
+  \dimen0 = #1\mil
+  \dimen2 = \ht\strutbox
+  \advance\dimen2 by \dp\strutbox
+  \ifdim\dimen0 > \dimen2
+    %
+    % Do a \strut just to make the height of this box be normal, so the
+    % normal leading is inserted relative to the preceding line.
+    % And a page break here is fine.
+    \vtop to #1\mil{\strut\vfil}%
+    %
+    % TeX does not even consider page breaks if a penalty added to the
+    % main vertical list is 10000 or more.  But in order to see if the
+    % empty box we just added fits on the page, we must make it consider
+    % page breaks.  On the other hand, we don't want to actually break the
+    % page after the empty box.  So we use a penalty of 9999.
+    %
+    % There is an extremely small chance that TeX will actually break the
+    % page at this \penalty, if there are no other feasible breakpoints in
+    % sight.  (If the user is using lots of big @group commands, which
+    % almost-but-not-quite fill up a page, TeX will have a hard time doing
+    % good page breaking, for example.)  However, I could not construct an
+    % example where a page broke at this \penalty; if it happens in a real
+    % document, then we can reconsider our strategy.
+    \penalty9999
+    %
+    % Back up by the size of the box, whether we did a page break or not.
+    \kern -#1\mil
+    %
+    % Do not allow a page break right after this kern.
+    \nobreak
+  \fi
+}
+
+% @br   forces paragraph break (and is undocumented).
+
+\let\br = \par
+
+% @page forces the start of a new page.
+%
+\def\page{\par\vfill\supereject}
+
+% @exdent text....
+% outputs text on separate line in roman font, starting at standard page margin
+
+% This records the amount of indent in the innermost environment.
+% That's how much \exdent should take out.
+\newskip\exdentamount
+
+% This defn is used inside fill environments such as @defun.
+\parseargdef\exdent{\hfil\break\hbox{\kern -\exdentamount{\rm#1}}\hfil\break}
+
+% This defn is used inside nofill environments such as @example.
+\parseargdef\nofillexdent{{\advance \leftskip by -\exdentamount
+  \leftline{\hskip\leftskip{\rm#1}}}}
+
+% @inmargin{WHICH}{TEXT} puts TEXT in the WHICH margin next to the current
+% paragraph.  For more general purposes, use the \margin insertion
+% class.  WHICH is `l' or `r'.  Not documented, written for gawk manual.
+%
+\newskip\inmarginspacing \inmarginspacing=1cm
+\def\strutdepth{\dp\strutbox}
+%
+\def\doinmargin#1#2{\strut\vadjust{%
+  \nobreak
+  \kern-\strutdepth
+  \vtop to \strutdepth{%
+    \baselineskip=\strutdepth
+    \vss
+    % if you have multiple lines of stuff to put here, you'll need to
+    % make the vbox yourself of the appropriate size.
+    \ifx#1l%
+      \llap{\ignorespaces #2\hskip\inmarginspacing}%
+    \else
+      \rlap{\hskip\hsize \hskip\inmarginspacing \ignorespaces #2}%
+    \fi
+    \null
+  }%
+}}
+\def\inleftmargin{\doinmargin l}
+\def\inrightmargin{\doinmargin r}
+%
+% @inmargin{TEXT [, RIGHT-TEXT]}
+% (if RIGHT-TEXT is given, use TEXT for left page, RIGHT-TEXT for right;
+% else use TEXT for both).
+%
+\def\inmargin#1{\parseinmargin #1,,\finish}
+\def\parseinmargin#1,#2,#3\finish{% not perfect, but better than nothing.
+  \setbox0 = \hbox{\ignorespaces #2}%
+  \ifdim\wd0 > 0pt
+    \def\lefttext{#1}%  have both texts
+    \def\righttext{#2}%
+  \else
+    \def\lefttext{#1}%  have only one text
+    \def\righttext{#1}%
+  \fi
+  %
+  \ifodd\pageno
+    \def\temp{\inrightmargin\righttext}% odd page -> outside is right margin
+  \else
+    \def\temp{\inleftmargin\lefttext}%
+  \fi
+  \temp
+}
+
+% @include FILE -- \input text of FILE.
+%
+\def\include{\parseargusing\filenamecatcodes\includezzz}
+\def\includezzz#1{%
+  \pushthisfilestack
+  \def\thisfile{#1}%
+  {%
+    \makevalueexpandable  % we want to expand any @value in FILE.
+    \turnoffactive        % and allow special characters in the expansion
+    \indexnofonts         % Allow `@@' and other weird things in file names.
+    \wlog{texinfo.tex: doing @include of #1^^J}%
+    \edef\temp{\noexpand\input #1 }%
+    %
+    % This trickery is to read FILE outside of a group, in case it makes
+    % definitions, etc.
+    \expandafter
+  }\temp
+  \popthisfilestack
+}
+\def\filenamecatcodes{%
+  \catcode`\\=\other
+  \catcode`~=\other
+  \catcode`^=\other
+  \catcode`_=\other
+  \catcode`|=\other
+  \catcode`<=\other
+  \catcode`>=\other
+  \catcode`+=\other
+  \catcode`-=\other
+  \catcode`\`=\other
+  \catcode`\'=\other
+}
+
+\def\pushthisfilestack{%
+  \expandafter\pushthisfilestackX\popthisfilestack\StackTerm
+}
+\def\pushthisfilestackX{%
+  \expandafter\pushthisfilestackY\thisfile\StackTerm
+}
+\def\pushthisfilestackY #1\StackTerm #2\StackTerm {%
+  \gdef\popthisfilestack{\gdef\thisfile{#1}\gdef\popthisfilestack{#2}}%
+}
+
+\def\popthisfilestack{\errthisfilestackempty}
+\def\errthisfilestackempty{\errmessage{Internal error:
+  the stack of filenames is empty.}}
+%
+\def\thisfile{}
+
+% @center line
+% outputs that line, centered.
+%
+\parseargdef\center{%
+  \ifhmode
+    \let\centersub\centerH
+  \else
+    \let\centersub\centerV
+  \fi
+  \centersub{\hfil \ignorespaces#1\unskip \hfil}%
+  \let\centersub\relax % don't let the definition persist, just in case
+}
+\def\centerH#1{{%
+  \hfil\break
+  \advance\hsize by -\leftskip
+  \advance\hsize by -\rightskip
+  \line{#1}%
+  \break
+}}
+%
+\newcount\centerpenalty
+\def\centerV#1{%
+  % The idea here is the same as in \startdefun, \cartouche, etc.: if
+  % @center is the first thing after a section heading, we need to wipe
+  % out the negative parskip inserted by \sectionheading, but still
+  % prevent a page break here.
+  \centerpenalty = \lastpenalty
+  \ifnum\centerpenalty>10000 \vskip\parskip \fi
+  \ifnum\centerpenalty>9999 \penalty\centerpenalty \fi
+  \line{\kern\leftskip #1\kern\rightskip}%
+}
+
+% @sp n   outputs n lines of vertical space
+%
+\parseargdef\sp{\vskip #1\baselineskip}
+
+% @comment ...line which is ignored...
+% @c is the same as @comment
+% @ignore ... @end ignore  is another way to write a comment
+
+
+\def\c{\begingroup \catcode`\^^M=\active%
+\catcode`\@=\other \catcode`\{=\other \catcode`\}=\other%
+\cxxx}
+{\catcode`\^^M=\active \gdef\cxxx#1^^M{\endgroup}}
+%
+\let\comment\c
+
+% @paragraphindent NCHARS
+% We'll use ems for NCHARS, close enough.
+% NCHARS can also be the word `asis' or `none'.
+% We cannot feasibly implement @paragraphindent asis, though.
+%
+\def\asisword{asis} % no translation, these are keywords
+\def\noneword{none}
+%
+\parseargdef\paragraphindent{%
+  \def\temp{#1}%
+  \ifx\temp\asisword
+  \else
+    \ifx\temp\noneword
+      \defaultparindent = 0pt
+    \else
+      \defaultparindent = #1em
+    \fi
+  \fi
+  \parindent = \defaultparindent
+}
+
+% @exampleindent NCHARS
+% We'll use ems for NCHARS like @paragraphindent.
+% It seems @exampleindent asis isn't necessary, but
+% I preserve it to make it similar to @paragraphindent.
+\parseargdef\exampleindent{%
+  \def\temp{#1}%
+  \ifx\temp\asisword
+  \else
+    \ifx\temp\noneword
+      \lispnarrowing = 0pt
+    \else
+      \lispnarrowing = #1em
+    \fi
+  \fi
+}
+
+% @firstparagraphindent WORD
+% If WORD is `none', then suppress indentation of the first paragraph
+% after a section heading.  If WORD is `insert', then do indent at such
+% paragraphs.
+%
+% The paragraph indentation is suppressed or not by calling
+% \suppressfirstparagraphindent, which the sectioning commands do.
+% We switch the definition of this back and forth according to WORD.
+% By default, we suppress indentation.
+%
+\def\suppressfirstparagraphindent{\dosuppressfirstparagraphindent}
+\def\insertword{insert}
+%
+\parseargdef\firstparagraphindent{%
+  \def\temp{#1}%
+  \ifx\temp\noneword
+    \let\suppressfirstparagraphindent = \dosuppressfirstparagraphindent
+  \else\ifx\temp\insertword
+    \let\suppressfirstparagraphindent = \relax
+  \else
+    \errhelp = \EMsimple
+    \errmessage{Unknown @firstparagraphindent option `\temp'}%
+  \fi\fi
+}
+
+% Here is how we actually suppress indentation.  Redefine \everypar to
+% \kern backwards by \parindent, and then reset itself to empty.
+%
+% We also make \indent itself not actually do anything until the next
+% paragraph.
+%
+\gdef\dosuppressfirstparagraphindent{%
+  \gdef\indent  {\restorefirstparagraphindent \indent}%
+  \gdef\noindent{\restorefirstparagraphindent \noindent}%
+  \global\everypar = {\kern -\parindent \restorefirstparagraphindent}%
+}
+%
+\gdef\restorefirstparagraphindent{%
+  \global\let\indent = \ptexindent
+  \global\let\noindent = \ptexnoindent
+  \global\everypar = {}%
+}
+
+% leave vertical mode without cancelling any first paragraph indent
+\gdef\imageindent{%
+  \toks0=\everypar
+  \everypar={}%
+  \ptexnoindent
+  \global\everypar=\toks0
+}
+
+
+% @refill is a no-op.
+\let\refill=\relax
+
+% @setfilename INFO-FILENAME - ignored
+\let\setfilename=\comment
+
+% @bye.
+\outer\def\bye{\chappager\pagelabels\tracingstats=1\ptexend}
+
+
+\message{pdf,}
+% adobe `portable' document format
+\newcount\tempnum
+\newcount\lnkcount
+\newtoks\filename
+\newcount\filenamelength
+\newcount\pgn
+\newtoks\toksA
+\newtoks\toksB
+\newtoks\toksC
+\newtoks\toksD
+\newbox\boxA
+\newbox\boxB
+\newcount\countA
+\newif\ifpdf
+\newif\ifpdfmakepagedest
+
+%
+% For LuaTeX
+%
+
+\newif\iftxiuseunicodedestname
+\txiuseunicodedestnamefalse % For pdfTeX etc.
+
+\ifx\luatexversion\thisisundefined
+\else
+  % Use Unicode destination names
+  \txiuseunicodedestnametrue
+  % Escape PDF strings with converting UTF-16 from UTF-8
+  \begingroup
+    \catcode`\%=12
+    \directlua{
+      function UTF16oct(str)
+        tex.sprint(string.char(0x5c) .. '376' .. string.char(0x5c) .. '377')
+        for c in string.utfvalues(str) do
+          if c < 0x10000 then
+            tex.sprint(
+              string.format(string.char(0x5c) .. string.char(0x25) .. '03o' ..
+                            string.char(0x5c) .. string.char(0x25) .. '03o',
+                            math.floor(c / 256), math.floor(c % 256)))
+          else
+            c = c - 0x10000
+            local c_hi = c / 1024 + 0xd800
+            local c_lo = c % 1024 + 0xdc00
+            tex.sprint(
+              string.format(string.char(0x5c) .. string.char(0x25) .. '03o' ..
+                            string.char(0x5c) .. string.char(0x25) .. '03o' ..
+                            string.char(0x5c) .. string.char(0x25) .. '03o' ..
+                            string.char(0x5c) .. string.char(0x25) .. '03o',
+                            math.floor(c_hi / 256), math.floor(c_hi % 256),
+                            math.floor(c_lo / 256), math.floor(c_lo % 256)))
+          end
+        end
+      end
+    }
+  \endgroup
+  \def\pdfescapestrutfsixteen#1{\directlua{UTF16oct('\luaescapestring{#1}')}}
+  % Escape PDF strings without converting
+  \begingroup
+    \directlua{
+      function PDFescstr(str)
+        for c in string.bytes(str) do
+          if c <= 0x20 or c >= 0x80 or c == 0x28 or c == 0x29 or c == 0x5c then
+            tex.sprint(-2,
+              string.format(string.char(0x5c) .. string.char(0x25) .. '03o',
+                            c))
+          else
+            tex.sprint(-2, string.char(c))
+          end
+        end
+      end
+    }
+    % The -2 in the arguments here gives all the input to TeX catcode 12
+    % (other) or 10 (space), preventing undefined control sequence errors. See
+    % https://lists.gnu.org/archive/html/bug-texinfo/2019-08/msg00031.html
+    %
+  \endgroup
+  \def\pdfescapestring#1{\directlua{PDFescstr('\luaescapestring{#1}')}}
+  \ifnum\luatexversion>84
+    % For LuaTeX >= 0.85
+    \def\pdfdest{\pdfextension dest}
+    \let\pdfoutput\outputmode
+    \def\pdfliteral{\pdfextension literal}
+    \def\pdfcatalog{\pdfextension catalog}
+    \def\pdftexversion{\numexpr\pdffeedback version\relax}
+    \let\pdfximage\saveimageresource
+    \let\pdfrefximage\useimageresource
+    \let\pdflastximage\lastsavedimageresourceindex
+    \def\pdfendlink{\pdfextension endlink\relax}
+    \def\pdfoutline{\pdfextension outline}
+    \def\pdfstartlink{\pdfextension startlink}
+    \def\pdffontattr{\pdfextension fontattr}
+    \def\pdfobj{\pdfextension obj}
+    \def\pdflastobj{\numexpr\pdffeedback lastobj\relax}
+    \let\pdfpagewidth\pagewidth
+    \let\pdfpageheight\pageheight
+    \edef\pdfhorigin{\pdfvariable horigin}
+    \edef\pdfvorigin{\pdfvariable vorigin}
+  \fi
+\fi
+
+% when pdftex is run in dvi mode, \pdfoutput is defined (so \pdfoutput=1
+% can be set).  So we test for \relax and 0 as well as being undefined.
+\ifx\pdfoutput\thisisundefined
+\else
+  \ifx\pdfoutput\relax
+  \else
+    \ifcase\pdfoutput
+    \else
+      \pdftrue
+    \fi
+  \fi
+\fi
+
+\newif\ifpdforxetex
+\pdforxetexfalse
+\ifpdf
+  \pdforxetextrue
+\fi
+\ifx\XeTeXrevision\thisisundefined\else
+  \pdforxetextrue
+\fi
+
+
+% Output page labels information.
+% See PDF reference v.1.7 p.594, section 8.3.1.
+\ifpdf
+\def\pagelabels{%
+  \def\title{0 << /P (T-) /S /D >>}%
+  \edef\roman{\the\romancount << /S /r >>}%
+  \edef\arabic{\the\arabiccount << /S /D >>}%
+  %
+  % Page label ranges must be increasing.  Remove any duplicates.
+  % (There is a slight chance of this being wrong if e.g. there is
+  % a @contents but no @titlepage, etc.)
+  %
+  \ifnum\romancount=0 \def\roman{}\fi
+  \ifnum\arabiccount=0 \def\title{}%
+  \else
+    \ifnum\romancount=\arabiccount \def\roman{}\fi
+  \fi
+  %
+  \ifnum\romancount<\arabiccount
+    \pdfcatalog{/PageLabels << /Nums [\title \roman \arabic ] >> }\relax
+  \else
+    \pdfcatalog{/PageLabels << /Nums [\title \arabic \roman ] >> }\relax
+  \fi
+}
+\else
+  \let\pagelabels\relax
+\fi
+
+\newcount\pagecount \pagecount=0
+\newcount\romancount \romancount=0
+\newcount\arabiccount \arabiccount=0
+\ifpdf
+  \let\ptxadvancepageno\advancepageno
+  \def\advancepageno{%
+    \ptxadvancepageno\global\advance\pagecount by 1
+  }
+\fi
+
+
+% PDF uses PostScript string constants for the names of xref targets,
+% for display in the outlines, and in other places.  Thus, we have to
+% double any backslashes.  Otherwise, a name like "\node" will be
+% interpreted as a newline (\n), followed by o, d, e.  Not good.
+%
+% See http://www.ntg.nl/pipermail/ntg-pdftex/2004-July/000654.html and
+% related messages.  The final outcome is that it is up to the TeX user
+% to double the backslashes and otherwise make the string valid, so
+% that's what we do.  pdftex 1.30.0 (ca.2005) introduced a primitive to
+% do this reliably, so we use it.
+
+% #1 is a control sequence in which to do the replacements,
+% which we \xdef.
+\def\txiescapepdf#1{%
+  \ifx\pdfescapestring\thisisundefined
+    % No primitive available; should we give a warning or log?
+    % Many times it won't matter.
+    \xdef#1{#1}%
+  \else
+    % The expandable \pdfescapestring primitive escapes parentheses,
+    % backslashes, and other special chars.
+    \xdef#1{\pdfescapestring{#1}}%
+  \fi
+}
+\def\txiescapepdfutfsixteen#1{%
+  \ifx\pdfescapestrutfsixteen\thisisundefined
+    % No UTF-16 converting macro available.
+    \txiescapepdf{#1}%
+  \else
+    \xdef#1{\pdfescapestrutfsixteen{#1}}%
+  \fi
+}
+
+\newhelp\nopdfimagehelp{Texinfo supports .png, .jpg, .jpeg, and .pdf images
+with PDF output, and none of those formats could be found.  (.eps cannot
+be supported due to the design of the PDF format; use regular TeX (DVI
+output) for that.)}
+
+\ifpdf
+  %
+  % Color manipulation macros using ideas from pdfcolor.tex,
+  % except using rgb instead of cmyk; the latter is said to render as a
+  % very dark gray on-screen and a very dark halftone in print, instead
+  % of actual black. The dark red here is dark enough to print on paper as
+  % nearly black, but still distinguishable for online viewing.  We use
+  % black by default, though.
+  \def\rgbDarkRed{0.50 0.09 0.12}
+  \def\rgbBlack{0 0 0}
+  %
+  % rg sets the color for filling (usual text, etc.);
+  % RG sets the color for stroking (thin rules, e.g., normal _'s).
+  \def\pdfsetcolor#1{\pdfliteral{#1 rg  #1 RG}}
+  %
+  % Set color, and create a mark which defines \thiscolor accordingly,
+  % so that \makeheadline knows which color to restore.
+  \def\setcolor#1{%
+    \xdef\currentcolordefs{\gdef\noexpand\thiscolor{#1}}%
+    \domark
+    \pdfsetcolor{#1}%
+  }
+  %
+  \def\maincolor{\rgbBlack}
+  \pdfsetcolor{\maincolor}
+  \edef\thiscolor{\maincolor}
+  \def\currentcolordefs{}
+  %
+  \def\makefootline{%
+    \baselineskip24pt
+    \line{\pdfsetcolor{\maincolor}\the\footline}%
+  }
+  %
+  \def\makeheadline{%
+    \vbox to 0pt{%
+      \vskip-22.5pt
+      \line{%
+        \vbox to8.5pt{}%
+        % Extract \thiscolor definition from the marks.
+        \getcolormarks
+        % Typeset the headline with \maincolor, then restore the color.
+        \pdfsetcolor{\maincolor}\the\headline\pdfsetcolor{\thiscolor}%
+      }%
+      \vss
+    }%
+    \nointerlineskip
+  }
+  %
+  %
+  \pdfcatalog{/PageMode /UseOutlines}
+  %
+  % #1 is image name, #2 width (might be empty/whitespace), #3 height (ditto).
+  \def\dopdfimage#1#2#3{%
+    \def\pdfimagewidth{#2}\setbox0 = \hbox{\ignorespaces #2}%
+    \def\pdfimageheight{#3}\setbox2 = \hbox{\ignorespaces #3}%
+    %
+    % pdftex (and the PDF format) support .pdf, .png, .jpg (among
+    % others).  Let's try in that order, PDF first since if
+    % someone has a scalable image, presumably better to use that than a
+    % bitmap.
+    \let\pdfimgext=\empty
+    \begingroup
+      \openin 1 #1.pdf \ifeof 1
+        \openin 1 #1.PDF \ifeof 1
+          \openin 1 #1.png \ifeof 1
+            \openin 1 #1.jpg \ifeof 1
+              \openin 1 #1.jpeg \ifeof 1
+                \openin 1 #1.JPG \ifeof 1
+                  \errhelp = \nopdfimagehelp
+                  \errmessage{Could not find image file #1 for pdf}%
+                \else \gdef\pdfimgext{JPG}%
+                \fi
+              \else \gdef\pdfimgext{jpeg}%
+              \fi
+            \else \gdef\pdfimgext{jpg}%
+            \fi
+          \else \gdef\pdfimgext{png}%
+          \fi
+        \else \gdef\pdfimgext{PDF}%
+        \fi
+      \else \gdef\pdfimgext{pdf}%
+      \fi
+      \closein 1
+    \endgroup
+    %
+    % without \immediate, ancient pdftex seg faults when the same image is
+    % included twice.  (Version 3.14159-pre-1.0-unofficial-20010704.)
+    \ifnum\pdftexversion < 14
+      \immediate\pdfimage
+    \else
+      \immediate\pdfximage
+    \fi
+      \ifdim \wd0 >0pt width \pdfimagewidth \fi
+      \ifdim \wd2 >0pt height \pdfimageheight \fi
+      \ifnum\pdftexversion<13
+         #1.\pdfimgext
+       \else
+         {#1.\pdfimgext}%
+       \fi
+    \ifnum\pdftexversion < 14 \else
+      \pdfrefximage \pdflastximage
+    \fi}
+  %
+  \def\setpdfdestname#1{{%
+    % We have to set dummies so commands such as @code, and characters
+    % such as \, aren't expanded when present in a section title.
+    \indexnofonts
+    \makevalueexpandable
+    \turnoffactive
+    \iftxiuseunicodedestname
+      \ifx \declaredencoding \latone
+        % Pass through Latin-1 characters.
+        % LuaTeX with byte wise I/O converts Latin-1 characters to Unicode.
+      \else
+        \ifx \declaredencoding \utfeight
+          % Pass through Unicode characters.
+        \else
+          % Use ASCII approximations in destination names.
+          \passthroughcharsfalse
+        \fi
+      \fi
+    \else
+      % Use ASCII approximations in destination names.
+      \passthroughcharsfalse
+    \fi
+    \def\pdfdestname{#1}%
+    \txiescapepdf\pdfdestname
+  }}
+  %
+  \def\setpdfoutlinetext#1{{%
+    \indexnofonts
+    \makevalueexpandable
+    \turnoffactive
+    \ifx \declaredencoding \latone
+      % The PDF format can use an extended form of Latin-1 in bookmark
+      % strings.  See Appendix D of the PDF Reference, Sixth Edition, for
+      % the "PDFDocEncoding".
+      \passthroughcharstrue
+      % Pass through Latin-1 characters.
+      %   LuaTeX: Convert to Unicode
+      %   pdfTeX: Use Latin-1 as PDFDocEncoding
+      \def\pdfoutlinetext{#1}%
+    \else
+      \ifx \declaredencoding \utfeight
+        \ifx\luatexversion\thisisundefined
+          % For pdfTeX  with UTF-8.
+          % TODO: the PDF format can use UTF-16 in bookmark strings,
+          % but the code for this isn't done yet.
+          % Use ASCII approximations.
+          \passthroughcharsfalse
+          \def\pdfoutlinetext{#1}%
+        \else
+          % For LuaTeX with UTF-8.
+          % Pass through Unicode characters for title texts.
+          \passthroughcharstrue
+          \def\pdfoutlinetext{#1}%
+        \fi
+      \else
+        % For non-Latin-1 or non-UTF-8 encodings.
+        % Use ASCII approximations.
+        \passthroughcharsfalse
+        \def\pdfoutlinetext{#1}%
+      \fi
+    \fi
+    % LuaTeX: Convert to UTF-16
+    % pdfTeX: Use Latin-1 as PDFDocEncoding
+    \txiescapepdfutfsixteen\pdfoutlinetext
+  }}
+  %
+  \def\pdfmkdest#1{%
+    \setpdfdestname{#1}%
+    \safewhatsit{\pdfdest name{\pdfdestname} xyz}%
+  }
+  %
+  % used to mark target names; must be expandable.
+  \def\pdfmkpgn#1{#1}
+  %
+  % by default, use black for everything.
+  \def\urlcolor{\rgbBlack}
+  \def\linkcolor{\rgbBlack}
+  \def\endlink{\setcolor{\maincolor}\pdfendlink}
+  %
+  % Adding outlines to PDF; macros for calculating structure of outlines
+  % come from Petr Olsak
+  \def\expnumber#1{\expandafter\ifx\csname#1\endcsname\relax 0%
+    \else \csname#1\endcsname \fi}
+  \def\advancenumber#1{\tempnum=\expnumber{#1}\relax
+    \advance\tempnum by 1
+    \expandafter\xdef\csname#1\endcsname{\the\tempnum}}
+  %
+  % #1 is the section text, which is what will be displayed in the
+  % outline by the pdf viewer.  #2 is the pdf expression for the number
+  % of subentries (or empty, for subsubsections).  #3 is the node text,
+  % which might be empty if this toc entry had no corresponding node.
+  % #4 is the page number
+  %
+  \def\dopdfoutline#1#2#3#4{%
+    % Generate a link to the node text if that exists; else, use the
+    % page number.  We could generate a destination for the section
+    % text in the case where a section has no node, but it doesn't
+    % seem worth the trouble, since most documents are normally structured.
+    \setpdfoutlinetext{#1}
+    \setpdfdestname{#3}
+    \ifx\pdfdestname\empty
+      \def\pdfdestname{#4}%
+    \fi
+    %
+    \pdfoutline goto name{\pdfmkpgn{\pdfdestname}}#2{\pdfoutlinetext}%
+  }
+  %
+  \def\pdfmakeoutlines{%
+    \begingroup
+      % Read toc silently, to get counts of subentries for \pdfoutline.
+      \def\partentry##1##2##3##4{}% ignore parts in the outlines
+      \def\numchapentry##1##2##3##4{%
+	\def\thischapnum{##2}%
+	\def\thissecnum{0}%
+	\def\thissubsecnum{0}%
+      }%
+      \def\numsecentry##1##2##3##4{%
+	\advancenumber{chap\thischapnum}%
+	\def\thissecnum{##2}%
+	\def\thissubsecnum{0}%
+      }%
+      \def\numsubsecentry##1##2##3##4{%
+	\advancenumber{sec\thissecnum}%
+	\def\thissubsecnum{##2}%
+      }%
+      \def\numsubsubsecentry##1##2##3##4{%
+	\advancenumber{subsec\thissubsecnum}%
+      }%
+      \def\thischapnum{0}%
+      \def\thissecnum{0}%
+      \def\thissubsecnum{0}%
+      %
+      % use \def rather than \let here because we redefine \chapentry et
+      % al. a second time, below.
+      \def\appentry{\numchapentry}%
+      \def\appsecentry{\numsecentry}%
+      \def\appsubsecentry{\numsubsecentry}%
+      \def\appsubsubsecentry{\numsubsubsecentry}%
+      \def\unnchapentry{\numchapentry}%
+      \def\unnsecentry{\numsecentry}%
+      \def\unnsubsecentry{\numsubsecentry}%
+      \def\unnsubsubsecentry{\numsubsubsecentry}%
+      \readdatafile{toc}%
+      %
+      % Read toc second time, this time actually producing the outlines.
+      % The `-' means take the \expnumber as the absolute number of
+      % subentries, which we calculated on our first read of the .toc above.
+      %
+      % We use the node names as the destinations.
+      %
+      % Currently we prefix the section name with the section number
+      % for chapter and appendix headings only in order to avoid too much
+      % horizontal space being required in the PDF viewer.
+      \def\numchapentry##1##2##3##4{%
+        \dopdfoutline{##2 ##1}{count-\expnumber{chap##2}}{##3}{##4}}%
+      \def\unnchapentry##1##2##3##4{%
+        \dopdfoutline{##1}{count-\expnumber{chap##2}}{##3}{##4}}%
+      \def\numsecentry##1##2##3##4{%
+        \dopdfoutline{##1}{count-\expnumber{sec##2}}{##3}{##4}}%
+      \def\numsubsecentry##1##2##3##4{%
+        \dopdfoutline{##1}{count-\expnumber{subsec##2}}{##3}{##4}}%
+      \def\numsubsubsecentry##1##2##3##4{% count is always zero
+        \dopdfoutline{##1}{}{##3}{##4}}%
+      %
+      % PDF outlines are displayed using system fonts, instead of
+      % document fonts.  Therefore we cannot use special characters,
+      % since the encoding is unknown.  For example, the eogonek from
+      % Latin 2 (0xea) gets translated to a | character.  Info from
+      % Staszek Wawrykiewicz, 19 Jan 2004 04:09:24 +0100.
+      %
+      % TODO this right, we have to translate 8-bit characters to
+      % their "best" equivalent, based on the @documentencoding.  Too
+      % much work for too little return.  Just use the ASCII equivalents
+      % we use for the index sort strings.
+      %
+      \indexnofonts
+      \setupdatafile
+      % We can have normal brace characters in the PDF outlines, unlike
+      % Texinfo index files.  So set that up.
+      \def\{{\lbracecharliteral}%
+      \def\}{\rbracecharliteral}%
+      \catcode`\\=\active \otherbackslash
+      \input \tocreadfilename
+    \endgroup
+  }
+  {\catcode`[=1 \catcode`]=2
+   \catcode`{=\other \catcode`}=\other
+   \gdef\lbracecharliteral[{]%
+   \gdef\rbracecharliteral[}]%
+  ]
+  %
+  \def\skipspaces#1{\def\PP{#1}\def\D{|}%
+    \ifx\PP\D\let\nextsp\relax
+    \else\let\nextsp\skipspaces
+      \addtokens{\filename}{\PP}%
+      \advance\filenamelength by 1
+    \fi
+    \nextsp}
+  \def\getfilename#1{%
+    \filenamelength=0
+    % If we don't expand the argument now, \skipspaces will get
+    % snagged on things like "@value{foo}".
+    \edef\temp{#1}%
+    \expandafter\skipspaces\temp|\relax
+  }
+  \ifnum\pdftexversion < 14
+    \let \startlink \pdfannotlink
+  \else
+    \let \startlink \pdfstartlink
+  \fi
+  % make a live url in pdf output.
+  \def\pdfurl#1{%
+    \begingroup
+      % it seems we really need yet another set of dummies; have not
+      % tried to figure out what each command should do in the context
+      % of @url.  for now, just make @/ a no-op, that's the only one
+      % people have actually reported a problem with.
+      %
+      \normalturnoffactive
+      \def\@{@}%
+      \let\/=\empty
+      \makevalueexpandable
+      % do we want to go so far as to use \indexnofonts instead of just
+      % special-casing \var here?
+      \def\var##1{##1}%
+      %
+      \leavevmode\setcolor{\urlcolor}%
+      \startlink attr{/Border [0 0 0]}%
+        user{/Subtype /Link /A << /S /URI /URI (#1) >>}%
+    \endgroup}
+  % \pdfgettoks - Surround page numbers in #1 with @pdflink.  #1 may
+  % be a simple number, or a list of numbers in the case of an index
+  % entry.
+  \def\pdfgettoks#1.{\setbox\boxA=\hbox{\toksA={#1.}\toksB={}\maketoks}}
+  \def\addtokens#1#2{\edef\addtoks{\noexpand#1={\the#1#2}}\addtoks}
+  \def\adn#1{\addtokens{\toksC}{#1}\global\countA=1\let\next=\maketoks}
+  \def\poptoks#1#2|ENDTOKS|{\let\first=#1\toksD={#1}\toksA={#2}}
+  \def\maketoks{%
+    \expandafter\poptoks\the\toksA|ENDTOKS|\relax
+    \ifx\first0\adn0
+    \else\ifx\first1\adn1 \else\ifx\first2\adn2 \else\ifx\first3\adn3
+    \else\ifx\first4\adn4 \else\ifx\first5\adn5 \else\ifx\first6\adn6
+    \else\ifx\first7\adn7 \else\ifx\first8\adn8 \else\ifx\first9\adn9
+    \else
+      \ifnum0=\countA\else\makelink\fi
+      \ifx\first.\let\next=\done\else
+        \let\next=\maketoks
+        \addtokens{\toksB}{\the\toksD}
+        \ifx\first,\addtokens{\toksB}{\space}\fi
+      \fi
+    \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
+    \next}
+  \def\makelink{\addtokens{\toksB}%
+    {\noexpand\pdflink{\the\toksC}}\toksC={}\global\countA=0}
+  \def\pdflink#1{%
+    \startlink attr{/Border [0 0 0]} goto name{\pdfmkpgn{#1}}
+    \setcolor{\linkcolor}#1\endlink}
+  \def\done{\edef\st{\global\noexpand\toksA={\the\toksB}}\st}
+\else
+  % non-pdf mode
+  \let\pdfmkdest = \gobble
+  \let\pdfurl = \gobble
+  \let\endlink = \relax
+  \let\setcolor = \gobble
+  \let\pdfsetcolor = \gobble
+  \let\pdfmakeoutlines = \relax
+\fi  % \ifx\pdfoutput
+
+%
+% For XeTeX
+%
+\ifx\XeTeXrevision\thisisundefined
+\else
+  %
+  % XeTeX version check
+  %
+  \ifnum\strcmp{\the\XeTeXversion\XeTeXrevision}{0.99996}>-1
+    % TeX Live 2016 contains XeTeX 0.99996 and xdvipdfmx 20160307.
+    % It can use the `dvipdfmx:config' special (from TeX Live SVN r40941).
+    % For avoiding PDF destination name replacement, we use this special
+    % instead of xdvipdfmx's command line option `-C 0x0010'.
+    \special{dvipdfmx:config C 0x0010}
+    % XeTeX 0.99995+ comes with xdvipdfmx 20160307+.
+    % It can handle Unicode destination names for PDF.
+    \txiuseunicodedestnametrue
+  \else
+    % XeTeX < 0.99996 (TeX Live < 2016) cannot use the
+    % `dvipdfmx:config' special.
+    % So for avoiding PDF destination name replacement,
+    % xdvipdfmx's command line option `-C 0x0010' is necessary.
+    %
+    % XeTeX < 0.99995 can not handle Unicode destination names for PDF
+    % because xdvipdfmx 20150315 has a UTF-16 conversion issue.
+    % It is fixed by xdvipdfmx 20160106 (TeX Live SVN r39753).
+    \txiuseunicodedestnamefalse
+  \fi
+  %
+  % Color support
+  %
+  \def\rgbDarkRed{0.50 0.09 0.12}
+  \def\rgbBlack{0 0 0}
+  %
+  \def\pdfsetcolor#1{\special{pdf:scolor [#1]}}
+  %
+  % Set color, and create a mark which defines \thiscolor accordingly,
+  % so that \makeheadline knows which color to restore.
+  \def\setcolor#1{%
+    \xdef\currentcolordefs{\gdef\noexpand\thiscolor{#1}}%
+    \domark
+    \pdfsetcolor{#1}%
+  }
+  %
+  \def\maincolor{\rgbBlack}
+  \pdfsetcolor{\maincolor}
+  \edef\thiscolor{\maincolor}
+  \def\currentcolordefs{}
+  %
+  \def\makefootline{%
+    \baselineskip24pt
+    \line{\pdfsetcolor{\maincolor}\the\footline}%
+  }
+  %
+  \def\makeheadline{%
+    \vbox to 0pt{%
+      \vskip-22.5pt
+      \line{%
+        \vbox to8.5pt{}%
+        % Extract \thiscolor definition from the marks.
+        \getcolormarks
+        % Typeset the headline with \maincolor, then restore the color.
+        \pdfsetcolor{\maincolor}\the\headline\pdfsetcolor{\thiscolor}%
+      }%
+      \vss
+    }%
+    \nointerlineskip
+  }
+  %
+  % PDF outline support
+  %
+  % Emulate pdfTeX primitive
+  \def\pdfdest name#1 xyz{%
+    \special{pdf:dest (#1) [@thispage /XYZ @xpos @ypos null]}%
+  }
+  %
+  \def\setpdfdestname#1{{%
+    % We have to set dummies so commands such as @code, and characters
+    % such as \, aren't expanded when present in a section title.
+    \indexnofonts
+    \makevalueexpandable
+    \turnoffactive
+    \iftxiuseunicodedestname
+      % Pass through Unicode characters.
+    \else
+      % Use ASCII approximations in destination names.
+      \passthroughcharsfalse
+    \fi
+    \def\pdfdestname{#1}%
+    \txiescapepdf\pdfdestname
+  }}
+  %
+  \def\setpdfoutlinetext#1{{%
+    \turnoffactive
+    % Always use Unicode characters in title texts.
+    \def\pdfoutlinetext{#1}%
+    % For XeTeX, xdvipdfmx converts to UTF-16.
+    % So we do not convert.
+    \txiescapepdf\pdfoutlinetext
+  }}
+  %
+  \def\pdfmkdest#1{%
+    \setpdfdestname{#1}%
+    \safewhatsit{\pdfdest name{\pdfdestname} xyz}%
+  }
+  %
+  % by default, use black for everything.
+  \def\urlcolor{\rgbBlack}
+  \def\linkcolor{\rgbBlack}
+  \def\endlink{\setcolor{\maincolor}\pdfendlink}
+  %
+  \def\dopdfoutline#1#2#3#4{%
+    \setpdfoutlinetext{#1}
+    \setpdfdestname{#3}
+    \ifx\pdfdestname\empty
+      \def\pdfdestname{#4}%
+    \fi
+    %
+    \special{pdf:out [-] #2 << /Title (\pdfoutlinetext) /A
+      << /S /GoTo /D (\pdfdestname) >> >> }%
+  }
+  %
+  \def\pdfmakeoutlines{%
+    \begingroup
+      %
+      % For XeTeX, counts of subentries are not necessary.
+      % Therefore, we read toc only once.
+      %
+      % We use node names as destinations.
+      %
+      % Currently we prefix the section name with the section number
+      % for chapter and appendix headings only in order to avoid too much
+      % horizontal space being required in the PDF viewer.
+      \def\partentry##1##2##3##4{}% ignore parts in the outlines
+      \def\numchapentry##1##2##3##4{%
+        \dopdfoutline{##2 ##1}{1}{##3}{##4}}%
+      \def\numsecentry##1##2##3##4{%
+        \dopdfoutline{##1}{2}{##3}{##4}}%
+      \def\numsubsecentry##1##2##3##4{%
+        \dopdfoutline{##1}{3}{##3}{##4}}%
+      \def\numsubsubsecentry##1##2##3##4{%
+        \dopdfoutline{##1}{4}{##3}{##4}}%
+      %
+      \let\appentry\numchapentry%
+      \let\appsecentry\numsecentry%
+      \let\appsubsecentry\numsubsecentry%
+      \let\appsubsubsecentry\numsubsubsecentry%
+      \def\unnchapentry##1##2##3##4{%
+        \dopdfoutline{##1}{1}{##3}{##4}}%
+      \let\unnsecentry\numsecentry%
+      \let\unnsubsecentry\numsubsecentry%
+      \let\unnsubsubsecentry\numsubsubsecentry%
+      %
+      % For XeTeX, xdvipdfmx converts strings to UTF-16.
+      % Therefore, the encoding and the language may not be considered.
+      %
+      \indexnofonts
+      \setupdatafile
+      % We can have normal brace characters in the PDF outlines, unlike
+      % Texinfo index files.  So set that up.
+      \def\{{\lbracecharliteral}%
+      \def\}{\rbracecharliteral}%
+      \catcode`\\=\active \otherbackslash
+      \input \tocreadfilename
+    \endgroup
+  }
+  {\catcode`[=1 \catcode`]=2
+   \catcode`{=\other \catcode`}=\other
+   \gdef\lbracecharliteral[{]%
+   \gdef\rbracecharliteral[}]%
+  ]
+
+  \special{pdf:docview << /PageMode /UseOutlines >> }
+  % ``\special{pdf:tounicode ...}'' is not necessary
+  % because xdvipdfmx converts strings from UTF-8 to UTF-16 without it.
+  % However, due to a UTF-16 conversion issue of xdvipdfmx 20150315,
+  % ``\special{pdf:dest ...}'' cannot handle non-ASCII strings.
+  % It is fixed by xdvipdfmx 20160106 (TeX Live SVN r39753).
+%
+  \def\skipspaces#1{\def\PP{#1}\def\D{|}%
+    \ifx\PP\D\let\nextsp\relax
+    \else\let\nextsp\skipspaces
+      \addtokens{\filename}{\PP}%
+      \advance\filenamelength by 1
+    \fi
+    \nextsp}
+  \def\getfilename#1{%
+    \filenamelength=0
+    % If we don't expand the argument now, \skipspaces will get
+    % snagged on things like "@value{foo}".
+    \edef\temp{#1}%
+    \expandafter\skipspaces\temp|\relax
+  }
+  % make a live url in pdf output.
+  \def\pdfurl#1{%
+    \begingroup
+      % it seems we really need yet another set of dummies; have not
+      % tried to figure out what each command should do in the context
+      % of @url.  for now, just make @/ a no-op, that's the only one
+      % people have actually reported a problem with.
+      %
+      \normalturnoffactive
+      \def\@{@}%
+      \let\/=\empty
+      \makevalueexpandable
+      % do we want to go so far as to use \indexnofonts instead of just
+      % special-casing \var here?
+      \def\var##1{##1}%
+      %
+      \leavevmode\setcolor{\urlcolor}%
+      \special{pdf:bann << /Border [0 0 0]
+        /Subtype /Link /A << /S /URI /URI (#1) >> >>}%
+    \endgroup}
+  \def\endlink{\setcolor{\maincolor}\special{pdf:eann}}
+  \def\pdfgettoks#1.{\setbox\boxA=\hbox{\toksA={#1.}\toksB={}\maketoks}}
+  \def\addtokens#1#2{\edef\addtoks{\noexpand#1={\the#1#2}}\addtoks}
+  \def\adn#1{\addtokens{\toksC}{#1}\global\countA=1\let\next=\maketoks}
+  \def\poptoks#1#2|ENDTOKS|{\let\first=#1\toksD={#1}\toksA={#2}}
+  \def\maketoks{%
+    \expandafter\poptoks\the\toksA|ENDTOKS|\relax
+    \ifx\first0\adn0
+    \else\ifx\first1\adn1 \else\ifx\first2\adn2 \else\ifx\first3\adn3
+    \else\ifx\first4\adn4 \else\ifx\first5\adn5 \else\ifx\first6\adn6
+    \else\ifx\first7\adn7 \else\ifx\first8\adn8 \else\ifx\first9\adn9
+    \else
+      \ifnum0=\countA\else\makelink\fi
+      \ifx\first.\let\next=\done\else
+        \let\next=\maketoks
+        \addtokens{\toksB}{\the\toksD}
+        \ifx\first,\addtokens{\toksB}{\space}\fi
+      \fi
+    \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
+    \next}
+  \def\makelink{\addtokens{\toksB}%
+    {\noexpand\pdflink{\the\toksC}}\toksC={}\global\countA=0}
+  \def\pdflink#1{%
+    \special{pdf:bann << /Border [0 0 0]
+      /Type /Annot /Subtype /Link /A << /S /GoTo /D (#1) >> >>}%
+    \setcolor{\linkcolor}#1\endlink}
+  \def\done{\edef\st{\global\noexpand\toksA={\the\toksB}}\st}
+%
+  %
+  % @image support
+  %
+  % #1 is image name, #2 width (might be empty/whitespace), #3 height (ditto).
+  \def\doxeteximage#1#2#3{%
+    \def\xeteximagewidth{#2}\setbox0 = \hbox{\ignorespaces #2}%
+    \def\xeteximageheight{#3}\setbox2 = \hbox{\ignorespaces #3}%
+    %
+    % XeTeX (and the PDF format) supports .pdf, .png, .jpg (among
+    % others).  Let's try in that order, PDF first since if
+    % someone has a scalable image, presumably better to use that than a
+    % bitmap.
+    \let\xeteximgext=\empty
+    \begingroup
+      \openin 1 #1.pdf \ifeof 1
+        \openin 1 #1.PDF \ifeof 1
+          \openin 1 #1.png \ifeof 1
+            \openin 1 #1.jpg \ifeof 1
+              \openin 1 #1.jpeg \ifeof 1
+                \openin 1 #1.JPG \ifeof 1
+                  \errmessage{Could not find image file #1 for XeTeX}%
+                \else \gdef\xeteximgext{JPG}%
+                \fi
+              \else \gdef\xeteximgext{jpeg}%
+              \fi
+            \else \gdef\xeteximgext{jpg}%
+            \fi
+          \else \gdef\xeteximgext{png}%
+          \fi
+        \else \gdef\xeteximgext{PDF}%
+        \fi
+      \else \gdef\xeteximgext{pdf}%
+      \fi
+      \closein 1
+    \endgroup
+    %
+    % Putting an \hbox around the image can prevent an over-long line
+    % after the image.
+    \hbox\bgroup
+      \def\xetexpdfext{pdf}%
+      \ifx\xeteximgext\xetexpdfext
+        \XeTeXpdffile "#1".\xeteximgext ""
+      \else
+        \def\xetexpdfext{PDF}%
+        \ifx\xeteximgext\xetexpdfext
+          \XeTeXpdffile "#1".\xeteximgext ""
+        \else
+          \XeTeXpicfile "#1".\xeteximgext ""
+        \fi
+      \fi
+      \ifdim \wd0 >0pt width \xeteximagewidth \fi
+      \ifdim \wd2 >0pt height \xeteximageheight \fi \relax
+    \egroup
+  }
+\fi
+
+
+%
+\message{fonts,}
+
+% Set the baselineskip to #1, and the lineskip and strut size
+% correspondingly.  There is no deep meaning behind these magic numbers
+% used as factors; they just match (closely enough) what Knuth defined.
+%
+\def\lineskipfactor{.08333}
+\def\strutheightpercent{.70833}
+\def\strutdepthpercent {.29167}
+%
+% can get a sort of poor man's double spacing by redefining this.
+\def\baselinefactor{1}
+%
+\newdimen\textleading
+\def\setleading#1{%
+  \dimen0 = #1\relax
+  \normalbaselineskip = \baselinefactor\dimen0
+  \normallineskip = \lineskipfactor\normalbaselineskip
+  \normalbaselines
+  \setbox\strutbox =\hbox{%
+    \vrule width0pt height\strutheightpercent\baselineskip
+                    depth \strutdepthpercent \baselineskip
+  }%
+}
+
+% PDF CMaps.  See also LaTeX's t1.cmap.
+%
+% do nothing with this by default.
+\expandafter\let\csname cmapOT1\endcsname\gobble
+\expandafter\let\csname cmapOT1IT\endcsname\gobble
+\expandafter\let\csname cmapOT1TT\endcsname\gobble
+
+% if we are producing pdf, and we have \pdffontattr, then define cmaps.
+% (\pdffontattr was introduced many years ago, but people still run
+% older pdftex's; it's easy to conditionalize, so we do.)
+\ifpdf \ifx\pdffontattr\thisisundefined \else
+  \begingroup
+    \catcode`\^^M=\active \def^^M{^^J}% Output line endings as the ^^J char.
+    \catcode`\%=12 \immediate\pdfobj stream {%!PS-Adobe-3.0 Resource-CMap
+%%DocumentNeededResources: ProcSet (CIDInit)
+%%IncludeResource: ProcSet (CIDInit)
+%%BeginResource: CMap (TeX-OT1-0)
+%%Title: (TeX-OT1-0 TeX OT1 0)
+%%Version: 1.000
+%%EndComments
+/CIDInit /ProcSet findresource begin
+12 dict begin
+begincmap
+/CIDSystemInfo
+<< /Registry (TeX)
+/Ordering (OT1)
+/Supplement 0
+>> def
+/CMapName /TeX-OT1-0 def
+/CMapType 2 def
+1 begincodespacerange
+<00> <7F>
+endcodespacerange
+8 beginbfrange
+<00> <01> <0393>
+<09> <0A> <03A8>
+<23> <26> <0023>
+<28> <3B> <0028>
+<3F> <5B> <003F>
+<5D> <5E> <005D>
+<61> <7A> <0061>
+<7B> <7C> <2013>
+endbfrange
+40 beginbfchar
+<02> <0398>
+<03> <039B>
+<04> <039E>
+<05> <03A0>
+<06> <03A3>
+<07> <03D2>
+<08> <03A6>
+<0B> <00660066>
+<0C> <00660069>
+<0D> <0066006C>
+<0E> <006600660069>
+<0F> <00660066006C>
+<10> <0131>
+<11> <0237>
+<12> <0060>
+<13> <00B4>
+<14> <02C7>
+<15> <02D8>
+<16> <00AF>
+<17> <02DA>
+<18> <00B8>
+<19> <00DF>
+<1A> <00E6>
+<1B> <0153>
+<1C> <00F8>
+<1D> <00C6>
+<1E> <0152>
+<1F> <00D8>
+<21> <0021>
+<22> <201D>
+<27> <2019>
+<3C> <00A1>
+<3D> <003D>
+<3E> <00BF>
+<5C> <201C>
+<5F> <02D9>
+<60> <2018>
+<7D> <02DD>
+<7E> <007E>
+<7F> <00A8>
+endbfchar
+endcmap
+CMapName currentdict /CMap defineresource pop
+end
+end
+%%EndResource
+%%EOF
+    }\endgroup
+  \expandafter\edef\csname cmapOT1\endcsname#1{%
+    \pdffontattr#1{/ToUnicode \the\pdflastobj\space 0 R}%
+  }%
+%
+% \cmapOT1IT
+  \begingroup
+    \catcode`\^^M=\active \def^^M{^^J}% Output line endings as the ^^J char.
+    \catcode`\%=12 \immediate\pdfobj stream {%!PS-Adobe-3.0 Resource-CMap
+%%DocumentNeededResources: ProcSet (CIDInit)
+%%IncludeResource: ProcSet (CIDInit)
+%%BeginResource: CMap (TeX-OT1IT-0)
+%%Title: (TeX-OT1IT-0 TeX OT1IT 0)
+%%Version: 1.000
+%%EndComments
+/CIDInit /ProcSet findresource begin
+12 dict begin
+begincmap
+/CIDSystemInfo
+<< /Registry (TeX)
+/Ordering (OT1IT)
+/Supplement 0
+>> def
+/CMapName /TeX-OT1IT-0 def
+/CMapType 2 def
+1 begincodespacerange
+<00> <7F>
+endcodespacerange
+8 beginbfrange
+<00> <01> <0393>
+<09> <0A> <03A8>
+<25> <26> <0025>
+<28> <3B> <0028>
+<3F> <5B> <003F>
+<5D> <5E> <005D>
+<61> <7A> <0061>
+<7B> <7C> <2013>
+endbfrange
+42 beginbfchar
+<02> <0398>
+<03> <039B>
+<04> <039E>
+<05> <03A0>
+<06> <03A3>
+<07> <03D2>
+<08> <03A6>
+<0B> <00660066>
+<0C> <00660069>
+<0D> <0066006C>
+<0E> <006600660069>
+<0F> <00660066006C>
+<10> <0131>
+<11> <0237>
+<12> <0060>
+<13> <00B4>
+<14> <02C7>
+<15> <02D8>
+<16> <00AF>
+<17> <02DA>
+<18> <00B8>
+<19> <00DF>
+<1A> <00E6>
+<1B> <0153>
+<1C> <00F8>
+<1D> <00C6>
+<1E> <0152>
+<1F> <00D8>
+<21> <0021>
+<22> <201D>
+<23> <0023>
+<24> <00A3>
+<27> <2019>
+<3C> <00A1>
+<3D> <003D>
+<3E> <00BF>
+<5C> <201C>
+<5F> <02D9>
+<60> <2018>
+<7D> <02DD>
+<7E> <007E>
+<7F> <00A8>
+endbfchar
+endcmap
+CMapName currentdict /CMap defineresource pop
+end
+end
+%%EndResource
+%%EOF
+    }\endgroup
+  \expandafter\edef\csname cmapOT1IT\endcsname#1{%
+    \pdffontattr#1{/ToUnicode \the\pdflastobj\space 0 R}%
+  }%
+%
+% \cmapOT1TT
+  \begingroup
+    \catcode`\^^M=\active \def^^M{^^J}% Output line endings as the ^^J char.
+    \catcode`\%=12 \immediate\pdfobj stream {%!PS-Adobe-3.0 Resource-CMap
+%%DocumentNeededResources: ProcSet (CIDInit)
+%%IncludeResource: ProcSet (CIDInit)
+%%BeginResource: CMap (TeX-OT1TT-0)
+%%Title: (TeX-OT1TT-0 TeX OT1TT 0)
+%%Version: 1.000
+%%EndComments
+/CIDInit /ProcSet findresource begin
+12 dict begin
+begincmap
+/CIDSystemInfo
+<< /Registry (TeX)
+/Ordering (OT1TT)
+/Supplement 0
+>> def
+/CMapName /TeX-OT1TT-0 def
+/CMapType 2 def
+1 begincodespacerange
+<00> <7F>
+endcodespacerange
+5 beginbfrange
+<00> <01> <0393>
+<09> <0A> <03A8>
+<21> <26> <0021>
+<28> <5F> <0028>
+<61> <7E> <0061>
+endbfrange
+32 beginbfchar
+<02> <0398>
+<03> <039B>
+<04> <039E>
+<05> <03A0>
+<06> <03A3>
+<07> <03D2>
+<08> <03A6>
+<0B> <2191>
+<0C> <2193>
+<0D> <0027>
+<0E> <00A1>
+<0F> <00BF>
+<10> <0131>
+<11> <0237>
+<12> <0060>
+<13> <00B4>
+<14> <02C7>
+<15> <02D8>
+<16> <00AF>
+<17> <02DA>
+<18> <00B8>
+<19> <00DF>
+<1A> <00E6>
+<1B> <0153>
+<1C> <00F8>
+<1D> <00C6>
+<1E> <0152>
+<1F> <00D8>
+<20> <2423>
+<27> <2019>
+<60> <2018>
+<7F> <00A8>
+endbfchar
+endcmap
+CMapName currentdict /CMap defineresource pop
+end
+end
+%%EndResource
+%%EOF
+    }\endgroup
+  \expandafter\edef\csname cmapOT1TT\endcsname#1{%
+    \pdffontattr#1{/ToUnicode \the\pdflastobj\space 0 R}%
+  }%
+\fi\fi
+
+
+% Set the font macro #1 to the font named \fontprefix#2.
+% #3 is the font's design size, #4 is a scale factor, #5 is the CMap
+% encoding (only OT1, OT1IT and OT1TT are allowed, or empty to omit).
+% Example:
+% #1 = \textrm
+% #2 = \rmshape
+% #3 = 10
+% #4 = \mainmagstep
+% #5 = OT1
+%
+\def\setfont#1#2#3#4#5{%
+  \font#1=\fontprefix#2#3 scaled #4
+  \csname cmap#5\endcsname#1%
+}
+% This is what gets called when #5 of \setfont is empty.
+\let\cmap\gobble
+%
+% (end of cmaps)
+
+% Use cm as the default font prefix.
+% To specify the font prefix, you must define \fontprefix
+% before you read in texinfo.tex.
+\ifx\fontprefix\thisisundefined
+\def\fontprefix{cm}
+\fi
+% Support font families that don't use the same naming scheme as CM.
+\def\rmshape{r}
+\def\rmbshape{bx}               % where the normal face is bold
+\def\bfshape{b}
+\def\bxshape{bx}
+\def\ttshape{tt}
+\def\ttbshape{tt}
+\def\ttslshape{sltt}
+\def\itshape{ti}
+\def\itbshape{bxti}
+\def\slshape{sl}
+\def\slbshape{bxsl}
+\def\sfshape{ss}
+\def\sfbshape{ss}
+\def\scshape{csc}
+\def\scbshape{csc}
+
+% Definitions for a main text size of 11pt.  (The default in Texinfo.)
+%
+\def\definetextfontsizexi{%
+% Text fonts (11.2pt, magstep1).
+\def\textnominalsize{11pt}
+\edef\mainmagstep{\magstephalf}
+\setfont\textrm\rmshape{10}{\mainmagstep}{OT1}
+\setfont\texttt\ttshape{10}{\mainmagstep}{OT1TT}
+\setfont\textbf\bfshape{10}{\mainmagstep}{OT1}
+\setfont\textit\itshape{10}{\mainmagstep}{OT1IT}
+\setfont\textsl\slshape{10}{\mainmagstep}{OT1}
+\setfont\textsf\sfshape{10}{\mainmagstep}{OT1}
+\setfont\textsc\scshape{10}{\mainmagstep}{OT1}
+\setfont\textttsl\ttslshape{10}{\mainmagstep}{OT1TT}
+\font\texti=cmmi10 scaled \mainmagstep
+\font\textsy=cmsy10 scaled \mainmagstep
+\def\textecsize{1095}
+
+% A few fonts for @defun names and args.
+\setfont\defbf\bfshape{10}{\magstep1}{OT1}
+\setfont\deftt\ttshape{10}{\magstep1}{OT1TT}
+\setfont\defsl\slshape{10}{\magstep1}{OT1}
+\setfont\defttsl\ttslshape{10}{\magstep1}{OT1TT}
+\def\df{\let\ttfont=\deftt \let\bffont = \defbf
+\let\ttslfont=\defttsl \let\slfont=\defsl \bf}
+
+% Fonts for indices, footnotes, small examples (9pt).
+\def\smallnominalsize{9pt}
+\setfont\smallrm\rmshape{9}{1000}{OT1}
+\setfont\smalltt\ttshape{9}{1000}{OT1TT}
+\setfont\smallbf\bfshape{10}{900}{OT1}
+\setfont\smallit\itshape{9}{1000}{OT1IT}
+\setfont\smallsl\slshape{9}{1000}{OT1}
+\setfont\smallsf\sfshape{9}{1000}{OT1}
+\setfont\smallsc\scshape{10}{900}{OT1}
+\setfont\smallttsl\ttslshape{10}{900}{OT1TT}
+\font\smalli=cmmi9
+\font\smallsy=cmsy9
+\def\smallecsize{0900}
+
+% Fonts for small examples (8pt).
+\def\smallernominalsize{8pt}
+\setfont\smallerrm\rmshape{8}{1000}{OT1}
+\setfont\smallertt\ttshape{8}{1000}{OT1TT}
+\setfont\smallerbf\bfshape{10}{800}{OT1}
+\setfont\smallerit\itshape{8}{1000}{OT1IT}
+\setfont\smallersl\slshape{8}{1000}{OT1}
+\setfont\smallersf\sfshape{8}{1000}{OT1}
+\setfont\smallersc\scshape{10}{800}{OT1}
+\setfont\smallerttsl\ttslshape{10}{800}{OT1TT}
+\font\smalleri=cmmi8
+\font\smallersy=cmsy8
+\def\smallerecsize{0800}
+
+% Fonts for math mode superscripts (7pt).
+\def\sevennominalsize{7pt}
+\setfont\sevenrm\rmshape{7}{1000}{OT1}
+\setfont\seventt\ttshape{10}{700}{OT1TT}
+\setfont\sevenbf\bfshape{10}{700}{OT1}
+\setfont\sevenit\itshape{7}{1000}{OT1IT}
+\setfont\sevensl\slshape{10}{700}{OT1}
+\setfont\sevensf\sfshape{10}{700}{OT1}
+\setfont\sevensc\scshape{10}{700}{OT1}
+\setfont\seventtsl\ttslshape{10}{700}{OT1TT}
+\font\seveni=cmmi7
+\font\sevensy=cmsy7
+\def\sevenecsize{0700}
+
+% Fonts for title page (20.4pt):
+\def\titlenominalsize{20pt}
+\setfont\titlerm\rmbshape{12}{\magstep3}{OT1}
+\setfont\titleit\itbshape{10}{\magstep4}{OT1IT}
+\setfont\titlesl\slbshape{10}{\magstep4}{OT1}
+\setfont\titlett\ttbshape{12}{\magstep3}{OT1TT}
+\setfont\titlettsl\ttslshape{10}{\magstep4}{OT1TT}
+\setfont\titlesf\sfbshape{17}{\magstep1}{OT1}
+\let\titlebf=\titlerm
+\setfont\titlesc\scbshape{10}{\magstep4}{OT1}
+\font\titlei=cmmi12 scaled \magstep3
+\font\titlesy=cmsy10 scaled \magstep4
+\def\titleecsize{2074}
+
+% Chapter (and unnumbered) fonts (17.28pt).
+\def\chapnominalsize{17pt}
+\setfont\chaprm\rmbshape{12}{\magstep2}{OT1}
+\setfont\chapit\itbshape{10}{\magstep3}{OT1IT}
+\setfont\chapsl\slbshape{10}{\magstep3}{OT1}
+\setfont\chaptt\ttbshape{12}{\magstep2}{OT1TT}
+\setfont\chapttsl\ttslshape{10}{\magstep3}{OT1TT}
+\setfont\chapsf\sfbshape{17}{1000}{OT1}
+\let\chapbf=\chaprm
+\setfont\chapsc\scbshape{10}{\magstep3}{OT1}
+\font\chapi=cmmi12 scaled \magstep2
+\font\chapsy=cmsy10 scaled \magstep3
+\def\chapecsize{1728}
+
+% Section fonts (14.4pt).
+\def\secnominalsize{14pt}
+\setfont\secrm\rmbshape{12}{\magstep1}{OT1}
+\setfont\secrmnotbold\rmshape{12}{\magstep1}{OT1}
+\setfont\secit\itbshape{10}{\magstep2}{OT1IT}
+\setfont\secsl\slbshape{10}{\magstep2}{OT1}
+\setfont\sectt\ttbshape{12}{\magstep1}{OT1TT}
+\setfont\secttsl\ttslshape{10}{\magstep2}{OT1TT}
+\setfont\secsf\sfbshape{12}{\magstep1}{OT1}
+\let\secbf\secrm
+\setfont\secsc\scbshape{10}{\magstep2}{OT1}
+\font\seci=cmmi12 scaled \magstep1
+\font\secsy=cmsy10 scaled \magstep2
+\def\sececsize{1440}
+
+% Subsection fonts (13.15pt).
+\def\ssecnominalsize{13pt}
+\setfont\ssecrm\rmbshape{12}{\magstephalf}{OT1}
+\setfont\ssecit\itbshape{10}{1315}{OT1IT}
+\setfont\ssecsl\slbshape{10}{1315}{OT1}
+\setfont\ssectt\ttbshape{12}{\magstephalf}{OT1TT}
+\setfont\ssecttsl\ttslshape{10}{1315}{OT1TT}
+\setfont\ssecsf\sfbshape{12}{\magstephalf}{OT1}
+\let\ssecbf\ssecrm
+\setfont\ssecsc\scbshape{10}{1315}{OT1}
+\font\sseci=cmmi12 scaled \magstephalf
+\font\ssecsy=cmsy10 scaled 1315
+\def\ssececsize{1200}
+
+% Reduced fonts for @acronym in text (10pt).
+\def\reducednominalsize{10pt}
+\setfont\reducedrm\rmshape{10}{1000}{OT1}
+\setfont\reducedtt\ttshape{10}{1000}{OT1TT}
+\setfont\reducedbf\bfshape{10}{1000}{OT1}
+\setfont\reducedit\itshape{10}{1000}{OT1IT}
+\setfont\reducedsl\slshape{10}{1000}{OT1}
+\setfont\reducedsf\sfshape{10}{1000}{OT1}
+\setfont\reducedsc\scshape{10}{1000}{OT1}
+\setfont\reducedttsl\ttslshape{10}{1000}{OT1TT}
+\font\reducedi=cmmi10
+\font\reducedsy=cmsy10
+\def\reducedecsize{1000}
+
+\textleading = 13.2pt % line spacing for 11pt CM
+\textfonts            % reset the current fonts
+\rm
+} % end of 11pt text font size definitions, \definetextfontsizexi
+
+
+% Definitions to make the main text be 10pt Computer Modern, with
+% section, chapter, etc., sizes following suit.  This is for the GNU
+% Press printing of the Emacs 22 manual.  Maybe other manuals in the
+% future.  Used with @smallbook, which sets the leading to 12pt.
+%
+\def\definetextfontsizex{%
+% Text fonts (10pt).
+\def\textnominalsize{10pt}
+\edef\mainmagstep{1000}
+\setfont\textrm\rmshape{10}{\mainmagstep}{OT1}
+\setfont\texttt\ttshape{10}{\mainmagstep}{OT1TT}
+\setfont\textbf\bfshape{10}{\mainmagstep}{OT1}
+\setfont\textit\itshape{10}{\mainmagstep}{OT1IT}
+\setfont\textsl\slshape{10}{\mainmagstep}{OT1}
+\setfont\textsf\sfshape{10}{\mainmagstep}{OT1}
+\setfont\textsc\scshape{10}{\mainmagstep}{OT1}
+\setfont\textttsl\ttslshape{10}{\mainmagstep}{OT1TT}
+\font\texti=cmmi10 scaled \mainmagstep
+\font\textsy=cmsy10 scaled \mainmagstep
+\def\textecsize{1000}
+
+% A few fonts for @defun names and args.
+\setfont\defbf\bfshape{10}{\magstephalf}{OT1}
+\setfont\deftt\ttshape{10}{\magstephalf}{OT1TT}
+\setfont\defsl\slshape{10}{\magstephalf}{OT1}
+\setfont\defttsl\ttslshape{10}{\magstephalf}{OT1TT}
+\def\df{\let\ttfont=\deftt \let\bffont = \defbf
+\let\slfont=\defsl \let\ttslfont=\defttsl \bf}
+
+% Fonts for indices, footnotes, small examples (9pt).
+\def\smallnominalsize{9pt}
+\setfont\smallrm\rmshape{9}{1000}{OT1}
+\setfont\smalltt\ttshape{9}{1000}{OT1TT}
+\setfont\smallbf\bfshape{10}{900}{OT1}
+\setfont\smallit\itshape{9}{1000}{OT1IT}
+\setfont\smallsl\slshape{9}{1000}{OT1}
+\setfont\smallsf\sfshape{9}{1000}{OT1}
+\setfont\smallsc\scshape{10}{900}{OT1}
+\setfont\smallttsl\ttslshape{10}{900}{OT1TT}
+\font\smalli=cmmi9
+\font\smallsy=cmsy9
+\def\smallecsize{0900}
+
+% Fonts for small examples (8pt).
+\def\smallernominalsize{8pt}
+\setfont\smallerrm\rmshape{8}{1000}{OT1}
+\setfont\smallertt\ttshape{8}{1000}{OT1TT}
+\setfont\smallerbf\bfshape{10}{800}{OT1}
+\setfont\smallerit\itshape{8}{1000}{OT1IT}
+\setfont\smallersl\slshape{8}{1000}{OT1}
+\setfont\smallersf\sfshape{8}{1000}{OT1}
+\setfont\smallersc\scshape{10}{800}{OT1}
+\setfont\smallerttsl\ttslshape{10}{800}{OT1TT}
+\font\smalleri=cmmi8
+\font\smallersy=cmsy8
+\def\smallerecsize{0800}
+
+% Fonts for math mode superscripts (7pt).
+\def\sevennominalsize{7pt}
+\setfont\sevenrm\rmshape{7}{1000}{OT1}
+\setfont\seventt\ttshape{10}{700}{OT1TT}
+\setfont\sevenbf\bfshape{10}{700}{OT1}
+\setfont\sevenit\itshape{7}{1000}{OT1IT}
+\setfont\sevensl\slshape{10}{700}{OT1}
+\setfont\sevensf\sfshape{10}{700}{OT1}
+\setfont\sevensc\scshape{10}{700}{OT1}
+\setfont\seventtsl\ttslshape{10}{700}{OT1TT}
+\font\seveni=cmmi7
+\font\sevensy=cmsy7
+\def\sevenecsize{0700}
+
+% Fonts for title page (20.4pt):
+\def\titlenominalsize{20pt}
+\setfont\titlerm\rmbshape{12}{\magstep3}{OT1}
+\setfont\titleit\itbshape{10}{\magstep4}{OT1IT}
+\setfont\titlesl\slbshape{10}{\magstep4}{OT1}
+\setfont\titlett\ttbshape{12}{\magstep3}{OT1TT}
+\setfont\titlettsl\ttslshape{10}{\magstep4}{OT1TT}
+\setfont\titlesf\sfbshape{17}{\magstep1}{OT1}
+\let\titlebf=\titlerm
+\setfont\titlesc\scbshape{10}{\magstep4}{OT1}
+\font\titlei=cmmi12 scaled \magstep3
+\font\titlesy=cmsy10 scaled \magstep4
+\def\titleecsize{2074}
+
+% Chapter fonts (14.4pt).
+\def\chapnominalsize{14pt}
+\setfont\chaprm\rmbshape{12}{\magstep1}{OT1}
+\setfont\chapit\itbshape{10}{\magstep2}{OT1IT}
+\setfont\chapsl\slbshape{10}{\magstep2}{OT1}
+\setfont\chaptt\ttbshape{12}{\magstep1}{OT1TT}
+\setfont\chapttsl\ttslshape{10}{\magstep2}{OT1TT}
+\setfont\chapsf\sfbshape{12}{\magstep1}{OT1}
+\let\chapbf\chaprm
+\setfont\chapsc\scbshape{10}{\magstep2}{OT1}
+\font\chapi=cmmi12 scaled \magstep1
+\font\chapsy=cmsy10 scaled \magstep2
+\def\chapecsize{1440}
+
+% Section fonts (12pt).
+\def\secnominalsize{12pt}
+\setfont\secrm\rmbshape{12}{1000}{OT1}
+\setfont\secit\itbshape{10}{\magstep1}{OT1IT}
+\setfont\secsl\slbshape{10}{\magstep1}{OT1}
+\setfont\sectt\ttbshape{12}{1000}{OT1TT}
+\setfont\secttsl\ttslshape{10}{\magstep1}{OT1TT}
+\setfont\secsf\sfbshape{12}{1000}{OT1}
+\let\secbf\secrm
+\setfont\secsc\scbshape{10}{\magstep1}{OT1}
+\font\seci=cmmi12
+\font\secsy=cmsy10 scaled \magstep1
+\def\sececsize{1200}
+
+% Subsection fonts (10pt).
+\def\ssecnominalsize{10pt}
+\setfont\ssecrm\rmbshape{10}{1000}{OT1}
+\setfont\ssecit\itbshape{10}{1000}{OT1IT}
+\setfont\ssecsl\slbshape{10}{1000}{OT1}
+\setfont\ssectt\ttbshape{10}{1000}{OT1TT}
+\setfont\ssecttsl\ttslshape{10}{1000}{OT1TT}
+\setfont\ssecsf\sfbshape{10}{1000}{OT1}
+\let\ssecbf\ssecrm
+\setfont\ssecsc\scbshape{10}{1000}{OT1}
+\font\sseci=cmmi10
+\font\ssecsy=cmsy10
+\def\ssececsize{1000}
+
+% Reduced fonts for @acronym in text (9pt).
+\def\reducednominalsize{9pt}
+\setfont\reducedrm\rmshape{9}{1000}{OT1}
+\setfont\reducedtt\ttshape{9}{1000}{OT1TT}
+\setfont\reducedbf\bfshape{10}{900}{OT1}
+\setfont\reducedit\itshape{9}{1000}{OT1IT}
+\setfont\reducedsl\slshape{9}{1000}{OT1}
+\setfont\reducedsf\sfshape{9}{1000}{OT1}
+\setfont\reducedsc\scshape{10}{900}{OT1}
+\setfont\reducedttsl\ttslshape{10}{900}{OT1TT}
+\font\reducedi=cmmi9
+\font\reducedsy=cmsy9
+\def\reducedecsize{0900}
+
+\divide\parskip by 2  % reduce space between paragraphs
+\textleading = 12pt   % line spacing for 10pt CM
+\textfonts            % reset the current fonts
+\rm
+} % end of 10pt text font size definitions, \definetextfontsizex
+
+% Fonts for short table of contents.
+\setfont\shortcontrm\rmshape{12}{1000}{OT1}
+\setfont\shortcontbf\bfshape{10}{\magstep1}{OT1}  % no cmb12
+\setfont\shortcontsl\slshape{12}{1000}{OT1}
+\setfont\shortconttt\ttshape{12}{1000}{OT1TT}
+
+
+% We provide the user-level command
+%   @fonttextsize 10
+% (or 11) to redefine the text font size.  pt is assumed.
+%
+\def\xiword{11}
+\def\xword{10}
+\def\xwordpt{10pt}
+%
+\parseargdef\fonttextsize{%
+  \def\textsizearg{#1}%
+  %\wlog{doing @fonttextsize \textsizearg}%
+  %
+  % Set \globaldefs so that documents can use this inside @tex, since
+  % makeinfo 4.8 does not support it, but we need it nonetheless.
+  %
+ \begingroup \globaldefs=1
+  \ifx\textsizearg\xword \definetextfontsizex
+  \else \ifx\textsizearg\xiword \definetextfontsizexi
+  \else
+    \errhelp=\EMsimple
+    \errmessage{@fonttextsize only supports `10' or `11', not `\textsizearg'}
+  \fi\fi
+ \endgroup
+}
+
+%
+% Change the current font style to #1, remembering it in \curfontstyle.
+% For now, we do not accumulate font styles: @b{@i{foo}} prints foo in
+% italics, not bold italics.
+%
+\def\setfontstyle#1{%
+  \def\curfontstyle{#1}% not as a control sequence, because we are \edef'd.
+  \csname #1font\endcsname  % change the current font
+}
+
+\def\rm{\fam=0 \setfontstyle{rm}}
+\def\it{\fam=\itfam \setfontstyle{it}}
+\def\sl{\fam=\slfam \setfontstyle{sl}}
+\def\bf{\fam=\bffam \setfontstyle{bf}}\def\bfstylename{bf}
+\def\tt{\fam=\ttfam \setfontstyle{tt}}\def\ttstylename{tt}
+
+% Texinfo sort of supports the sans serif font style, which plain TeX does not.
+% So we set up a \sf.
+\newfam\sffam
+\def\sf{\fam=\sffam \setfontstyle{sf}}
+
+% We don't need math for this font style.
+\def\ttsl{\setfontstyle{ttsl}}
+
+
+% In order for the font changes to affect most math symbols and letters,
+% we have to define the \textfont of the standard families.
+% We don't bother to reset \scriptscriptfont; awaiting user need.
+%
+\def\resetmathfonts{%
+  \textfont0=\rmfont \textfont1=\ifont \textfont2=\syfont
+  \textfont\itfam=\itfont \textfont\slfam=\slfont \textfont\bffam=\bffont
+  \textfont\ttfam=\ttfont \textfont\sffam=\sffont
+  %
+  % Fonts for superscript.  Note that the 7pt fonts are used regardless
+  % of the current font size.
+  \scriptfont0=\sevenrm \scriptfont1=\seveni \scriptfont2=\sevensy
+  \scriptfont\itfam=\sevenit \scriptfont\slfam=\sevensl
+  \scriptfont\bffam=\sevenbf \scriptfont\ttfam=\seventt
+  \scriptfont\sffam=\sevensf
+}
+
+%
+
+% The font-changing commands (all called \...fonts) redefine the meanings
+% of \STYLEfont, instead of just \STYLE.  We do this because \STYLE needs
+% to also set the current \fam for math mode.  Our \STYLE (e.g., \rm)
+% commands hardwire \STYLEfont to set the current font.
+%
+% The fonts used for \ifont are for "math italics"  (\itfont is for italics
+% in regular text).  \syfont is also used in math mode only.
+%
+% Each font-changing command also sets the names \lsize (one size lower)
+% and \lllsize (three sizes lower).  These relative commands are used
+% in, e.g., the LaTeX logo and acronyms.
+%
+% This all needs generalizing, badly.
+%
+
+\def\assignfonts#1{%
+  \expandafter\let\expandafter\rmfont\csname #1rm\endcsname
+  \expandafter\let\expandafter\itfont\csname #1it\endcsname
+  \expandafter\let\expandafter\slfont\csname #1sl\endcsname
+  \expandafter\let\expandafter\bffont\csname #1bf\endcsname
+  \expandafter\let\expandafter\ttfont\csname #1tt\endcsname
+  \expandafter\let\expandafter\smallcaps\csname #1sc\endcsname
+  \expandafter\let\expandafter\sffont  \csname #1sf\endcsname
+  \expandafter\let\expandafter\ifont   \csname #1i\endcsname
+  \expandafter\let\expandafter\syfont  \csname #1sy\endcsname
+  \expandafter\let\expandafter\ttslfont\csname #1ttsl\endcsname
+}
+
+\newif\ifrmisbold
+
+% Select smaller font size with the current style.  Used to change font size
+% in, e.g., the LaTeX logo and acronyms.  If we are using bold fonts for
+% normal roman text, also use bold fonts for roman text in the smaller size.
+\def\switchtolllsize{%
+   \expandafter\assignfonts\expandafter{\lllsize}%
+   \ifrmisbold
+     \let\rmfont\bffont
+   \fi
+   \csname\curfontstyle\endcsname
+}%
+
+\def\switchtolsize{%
+   \expandafter\assignfonts\expandafter{\lsize}%
+   \ifrmisbold
+     \let\rmfont\bffont
+   \fi
+   \csname\curfontstyle\endcsname
+}%
+
+\def\definefontsetatsize#1#2#3#4#5{%
+\expandafter\def\csname #1fonts\endcsname{%
+  \def\curfontsize{#1}%
+  \def\lsize{#2}\def\lllsize{#3}%
+  \csname rmisbold#5\endcsname
+  \assignfonts{#1}%
+  \resetmathfonts
+  \setleading{#4}%
+}}
+
+\definefontsetatsize{text}   {reduced}{smaller}{\textleading}{false}
+\definefontsetatsize{title}  {chap}   {subsec} {27pt}  {true}
+\definefontsetatsize{chap}   {sec}    {text}   {19pt}  {true}
+\definefontsetatsize{sec}    {subsec} {reduced}{17pt}  {true}
+\definefontsetatsize{ssec}   {text}   {small}  {15pt}  {true}
+\definefontsetatsize{reduced}{small}  {smaller}{10.5pt}{false}
+\definefontsetatsize{small}  {smaller}{smaller}{10.5pt}{false}
+\definefontsetatsize{smaller}{smaller}{smaller}{9.5pt} {false}
+
+\def\titlefont#1{{\titlefonts\rm #1}}
+\let\subsecfonts = \ssecfonts
+\let\subsubsecfonts = \ssecfonts
+
+% Define these just so they can be easily changed for other fonts.
+\def\angleleft{$\langle$}
+\def\angleright{$\rangle$}
+
+% Set the fonts to use with the @small... environments.
+\let\smallexamplefonts = \smallfonts
+
+% About \smallexamplefonts.  If we use \smallfonts (9pt), @smallexample
+% can fit this many characters:
+%   8.5x11=86   smallbook=72  a4=90  a5=69
+% If we use \scriptfonts (8pt), then we can fit this many characters:
+%   8.5x11=90+  smallbook=80  a4=90+  a5=77
+% For me, subjectively, the few extra characters that fit aren't worth
+% the additional smallness of 8pt.  So I'm making the default 9pt.
+%
+% By the way, for comparison, here's what fits with @example (10pt):
+%   8.5x11=71  smallbook=60  a4=75  a5=58
+% --karl, 24jan03.
+
+% Set up the default fonts, so we can use them for creating boxes.
+%
+\definetextfontsizexi
+
+
+% Check if we are currently using a typewriter font.  Since all the
+% Computer Modern typewriter fonts have zero interword stretch (and
+% shrink), and it is reasonable to expect all typewriter fonts to have
+% this property, we can check that font parameter.
+%
+\def\ifmonospace{\ifdim\fontdimen3\font=0pt }
+
+{
+\catcode`\'=\active
+\catcode`\`=\active
+
+\gdef\setcodequotes{\let`\codequoteleft \let'\codequoteright}
+\gdef\setregularquotes{\let`\lq \let'\rq}
+}
+
+% Allow an option to not use regular directed right quote/apostrophe
+% (char 0x27), but instead the undirected quote from cmtt (char 0x0d).
+% The undirected quote is ugly, so don't make it the default, but it
+% works for pasting with more pdf viewers (at least evince), the
+% lilypond developers report.  xpdf does work with the regular 0x27.
+%
+\def\codequoteright{%
+  \ifmonospace
+    \expandafter\ifx\csname SETtxicodequoteundirected\endcsname\relax
+      \expandafter\ifx\csname SETcodequoteundirected\endcsname\relax
+        '%
+      \else \char'15 \fi
+    \else \char'15 \fi
+   \else
+     '%
+   \fi
+}
+%
+% and a similar option for the left quote char vs. a grave accent.
+% Modern fonts display ASCII 0x60 as a grave accent, so some people like
+% the code environments to do likewise.
+%
+\def\codequoteleft{%
+  \ifmonospace
+    \expandafter\ifx\csname SETtxicodequotebacktick\endcsname\relax
+      \expandafter\ifx\csname SETcodequotebacktick\endcsname\relax
+        % [Knuth] pp. 380,381,391
+        % \relax disables Spanish ligatures ?` and !` of \tt font.
+        \relax`%
+      \else \char'22 \fi
+    \else \char'22 \fi
+   \else
+     \relax`%
+   \fi
+}
+
+% Commands to set the quote options.
+%
+\parseargdef\codequoteundirected{%
+  \def\temp{#1}%
+  \ifx\temp\onword
+    \expandafter\let\csname SETtxicodequoteundirected\endcsname
+      = t%
+  \else\ifx\temp\offword
+    \expandafter\let\csname SETtxicodequoteundirected\endcsname
+      = \relax
+  \else
+    \errhelp = \EMsimple
+    \errmessage{Unknown @codequoteundirected value `\temp', must be on|off}%
+  \fi\fi
+}
+%
+\parseargdef\codequotebacktick{%
+  \def\temp{#1}%
+  \ifx\temp\onword
+    \expandafter\let\csname SETtxicodequotebacktick\endcsname
+      = t%
+  \else\ifx\temp\offword
+    \expandafter\let\csname SETtxicodequotebacktick\endcsname
+      = \relax
+  \else
+    \errhelp = \EMsimple
+    \errmessage{Unknown @codequotebacktick value `\temp', must be on|off}%
+  \fi\fi
+}
+
+% [Knuth] pp. 380,381,391, disable Spanish ligatures ?` and !` of \tt font.
+\def\noligaturesquoteleft{\relax\lq}
+
+% Count depth in font-changes, for error checks
+\newcount\fontdepth \fontdepth=0
+
+% Font commands.
+
+% #1 is the font command (\sl or \it), #2 is the text to slant.
+% If we are in a monospaced environment, however, 1) always use \ttsl,
+% and 2) do not add an italic correction.
+\def\dosmartslant#1#2{%
+  \ifusingtt
+    {{\ttsl #2}\let\next=\relax}%
+    {\def\next{{#1#2}\futurelet\next\smartitaliccorrection}}%
+  \next
+}
+\def\smartslanted{\dosmartslant\sl}
+\def\smartitalic{\dosmartslant\it}
+
+% Output an italic correction unless \next (presumed to be the following
+% character) is such as not to need one.
+\def\smartitaliccorrection{%
+  \ifx\next,%
+  \else\ifx\next-%
+  \else\ifx\next.%
+  \else\ifx\next\.%
+  \else\ifx\next\comma%
+  \else\ptexslash
+  \fi\fi\fi\fi\fi
+  \aftersmartic
+}
+
+% Unconditional use \ttsl, and no ic.  @var is set to this for defuns.
+\def\ttslanted#1{{\ttsl #1}}
+
+% @cite is like \smartslanted except unconditionally use \sl.  We never want
+% ttsl for book titles, do we?
+\def\cite#1{{\sl #1}\futurelet\next\smartitaliccorrection}
+
+\def\aftersmartic{}
+\def\var#1{%
+  \let\saveaftersmartic = \aftersmartic
+  \def\aftersmartic{\null\let\aftersmartic=\saveaftersmartic}%
+  \smartslanted{#1}%
+}
+
+\let\i=\smartitalic
+\let\slanted=\smartslanted
+\let\dfn=\smartslanted
+\let\emph=\smartitalic
+
+% Explicit font changes: @r, @sc, undocumented @ii.
+\def\r#1{{\rm #1}}              % roman font
+\def\sc#1{{\smallcaps#1}}       % smallcaps font
+\def\ii#1{{\it #1}}             % italic font
+
+% @b, explicit bold.  Also @strong.
+\def\b#1{{\bf #1}}
+\let\strong=\b
+
+% @sansserif, explicit sans.
+\def\sansserif#1{{\sf #1}}
+
+% We can't just use \exhyphenpenalty, because that only has effect at
+% the end of a paragraph.  Restore normal hyphenation at the end of the
+% group within which \nohyphenation is presumably called.
+%
+\def\nohyphenation{\hyphenchar\font = -1  \aftergroup\restorehyphenation}
+\def\restorehyphenation{\hyphenchar\font = `- }
+
+% Set sfcode to normal for the chars that usually have another value.
+% Can't use plain's \frenchspacing because it uses the `\x notation, and
+% sometimes \x has an active definition that messes things up.
+%
+\catcode`@=11
+  \def\plainfrenchspacing{%
+    \sfcode`\.=\@m \sfcode`\?=\@m \sfcode`\!=\@m
+    \sfcode`\:=\@m \sfcode`\;=\@m \sfcode`\,=\@m
+    \def\endofsentencespacefactor{1000}% for @. and friends
+  }
+  \def\plainnonfrenchspacing{%
+    \sfcode`\.3000\sfcode`\?3000\sfcode`\!3000
+    \sfcode`\:2000\sfcode`\;1500\sfcode`\,1250
+    \def\endofsentencespacefactor{3000}% for @. and friends
+  }
+\catcode`@=\other
+\def\endofsentencespacefactor{3000}% default
+
+% @t, explicit typewriter.
+\def\t#1{%
+  {\tt \plainfrenchspacing #1}%
+  \null
+}
+
+% @samp.
+\def\samp#1{{\setcodequotes\lq\tclose{#1}\rq\null}}
+
+% @indicateurl is \samp, that is, with quotes.
+\let\indicateurl=\samp
+
+% @code (and similar) prints in typewriter, but with spaces the same
+% size as normal in the surrounding text, without hyphenation, etc.
+% This is a subroutine for that.
+\def\tclose#1{%
+  {%
+    % Change normal interword space to be same as for the current font.
+    \spaceskip = \fontdimen2\font
+    %
+    % Switch to typewriter.
+    \tt
+    %
+    % But `\ ' produces the large typewriter interword space.
+    \def\ {{\spaceskip = 0pt{} }}%
+    %
+    % Turn off hyphenation.
+    \nohyphenation
+    %
+    \plainfrenchspacing
+    #1%
+  }%
+  \null % reset spacefactor to 1000
+}
+
+% We *must* turn on hyphenation at `-' and `_' in @code.
+% (But see \codedashfinish below.)
+% Otherwise, it is too hard to avoid overfull hboxes
+% in the Emacs manual, the Library manual, etc.
+%
+% Unfortunately, TeX uses one parameter (\hyphenchar) to control
+% both hyphenation at - and hyphenation within words.
+% We must therefore turn them both off (\tclose does that)
+% and arrange explicitly to hyphenate at a dash. -- rms.
+{
+  \catcode`\-=\active \catcode`\_=\active
+  \catcode`\'=\active \catcode`\`=\active
+  \global\let'=\rq \global\let`=\lq  % default definitions
+  %
+  \global\def\code{\begingroup
+    \setcodequotes
+    \catcode\dashChar=\active  \catcode\underChar=\active
+    \ifallowcodebreaks
+     \let-\codedash
+     \let_\codeunder
+    \else
+     \let-\normaldash
+     \let_\realunder
+    \fi
+    % Given -foo (with a single dash), we do not want to allow a break
+    % after the hyphen.
+    \global\let\codedashprev=\codedash
+    %
+    \codex
+  }
+  %
+  \gdef\codedash{\futurelet\next\codedashfinish}
+  \gdef\codedashfinish{%
+    \normaldash % always output the dash character itself.
+    %
+    % Now, output a discretionary to allow a line break, unless
+    % (a) the next character is a -, or
+    % (b) the preceding character is a -.
+    % E.g., given --posix, we do not want to allow a break after either -.
+    % Given --foo-bar, we do want to allow a break between the - and the b.
+    \ifx\next\codedash \else
+      \ifx\codedashprev\codedash
+      \else \discretionary{}{}{}\fi
+    \fi
+    % we need the space after the = for the case when \next itself is a
+    % space token; it would get swallowed otherwise.  As in @code{- a}.
+    \global\let\codedashprev= \next
+  }
+}
+\def\normaldash{-}
+%
+\def\codex #1{\tclose{#1}\endgroup}
+
+\def\codeunder{%
+  % this is all so @math{@code{var_name}+1} can work.  In math mode, _
+  % is "active" (mathcode"8000) and \normalunderscore (or \char95, etc.)
+  % will therefore expand the active definition of _, which is us
+  % (inside @code that is), therefore an endless loop.
+  \ifusingtt{\ifmmode
+               \mathchar"075F % class 0=ordinary, family 7=ttfam, pos 0x5F=_.
+             \else\normalunderscore \fi
+             \discretionary{}{}{}}%
+            {\_}%
+}
+
+% An additional complication: the above will allow breaks after, e.g.,
+% each of the four underscores in __typeof__.  This is bad.
+% @allowcodebreaks provides a document-level way to turn breaking at -
+% and _ on and off.
+%
+\newif\ifallowcodebreaks  \allowcodebreakstrue
+
+\def\keywordtrue{true}
+\def\keywordfalse{false}
+
+\parseargdef\allowcodebreaks{%
+  \def\txiarg{#1}%
+  \ifx\txiarg\keywordtrue
+    \allowcodebreakstrue
+  \else\ifx\txiarg\keywordfalse
+    \allowcodebreaksfalse
+  \else
+    \errhelp = \EMsimple
+    \errmessage{Unknown @allowcodebreaks option `\txiarg', must be true|false}%
+  \fi\fi
+}
+
+% For @command, @env, @file, @option quotes seem unnecessary,
+% so use \code rather than \samp.
+\let\command=\code
+\let\env=\code
+\let\file=\code
+\let\option=\code
+
+% @uref (abbreviation for `urlref') aka @url takes an optional
+% (comma-separated) second argument specifying the text to display and
+% an optional third arg as text to display instead of (rather than in
+% addition to) the url itself.  First (mandatory) arg is the url.
+
+% TeX-only option to allow changing PDF output to show only the second
+% arg (if given), and not the url (which is then just the link target).
+\newif\ifurefurlonlylink
+
+% The default \pretolerance setting stops the penalty inserted in
+% \urefallowbreak being a discouragement to line breaking.  Set it to
+% a negative value for this paragraph only.  Hopefully this does not
+% conflict with redefinitions of \par done elsewhere.
+\def\nopretolerance{%
+\pretolerance=-1
+\def\par{\endgraf\pretolerance=100 \let\par\endgraf}%
+}
+
+% The main macro is \urefbreak, which allows breaking at expected
+% places within the url.
+\def\urefbreak{\nopretolerance \begingroup \urefcatcodes \dourefbreak}
+\let\uref=\urefbreak
+%
+\def\dourefbreak#1{\urefbreakfinish #1,,,\finish}
+\def\urefbreakfinish#1,#2,#3,#4\finish{% doesn't work in @example
+  \unsepspaces
+  \pdfurl{#1}%
+  \setbox0 = \hbox{\ignorespaces #3}%
+  \ifdim\wd0 > 0pt
+    \unhbox0 % third arg given, show only that
+  \else
+    \setbox0 = \hbox{\ignorespaces #2}% look for second arg
+    \ifdim\wd0 > 0pt
+      \ifpdf
+        % For pdfTeX and LuaTeX
+        \ifurefurlonlylink
+          % PDF plus option to not display url, show just arg
+          \unhbox0
+        \else
+          % PDF, normally display both arg and url for consistency,
+          % visibility, if the pdf is eventually used to print, etc.
+          \unhbox0\ (\urefcode{#1})%
+        \fi
+      \else
+        \ifx\XeTeXrevision\thisisundefined
+          \unhbox0\ (\urefcode{#1})% DVI, always show arg and url
+        \else
+          % For XeTeX
+          \ifurefurlonlylink
+            % PDF plus option to not display url, show just arg
+            \unhbox0
+          \else
+            % PDF, normally display both arg and url for consistency,
+            % visibility, if the pdf is eventually used to print, etc.
+            \unhbox0\ (\urefcode{#1})%
+          \fi
+        \fi
+      \fi
+    \else
+      \urefcode{#1}% only url given, so show it
+    \fi
+  \fi
+  \endlink
+\endgroup}
+
+% Allow line breaks around only a few characters (only).
+\def\urefcatcodes{%
+  \catcode`\&=\active \catcode`\.=\active
+  \catcode`\#=\active \catcode`\?=\active
+  \catcode`\/=\active
+}
+{
+  \urefcatcodes
+  %
+  \global\def\urefcode{\begingroup
+    \setcodequotes
+    \urefcatcodes
+    \let&\urefcodeamp
+    \let.\urefcodedot
+    \let#\urefcodehash
+    \let?\urefcodequest
+    \let/\urefcodeslash
+    \codex
+  }
+  %
+  % By default, they are just regular characters.
+  \global\def&{\normalamp}
+  \global\def.{\normaldot}
+  \global\def#{\normalhash}
+  \global\def?{\normalquest}
+  \global\def/{\normalslash}
+}
+
+\def\urefcodeamp{\urefprebreak \&\urefpostbreak}
+\def\urefcodedot{\urefprebreak .\urefpostbreak}
+\def\urefcodehash{\urefprebreak \#\urefpostbreak}
+\def\urefcodequest{\urefprebreak ?\urefpostbreak}
+\def\urefcodeslash{\futurelet\next\urefcodeslashfinish}
+{
+  \catcode`\/=\active
+  \global\def\urefcodeslashfinish{%
+    \urefprebreak \slashChar
+    % Allow line break only after the final / in a sequence of
+    % slashes, to avoid line break between the slashes in http://.
+    \ifx\next/\else \urefpostbreak \fi
+  }
+}
+
+% By default we'll break after the special characters, but some people like to
+% break before the special chars, so allow that.  Also allow no breaking at
+% all, for manual control.
+%
+\parseargdef\urefbreakstyle{%
+  \def\txiarg{#1}%
+  \ifx\txiarg\wordnone
+    \def\urefprebreak{\nobreak}\def\urefpostbreak{\nobreak}
+  \else\ifx\txiarg\wordbefore
+    \def\urefprebreak{\urefallowbreak}\def\urefpostbreak{\nobreak}
+  \else\ifx\txiarg\wordafter
+    \def\urefprebreak{\nobreak}\def\urefpostbreak{\urefallowbreak}
+  \else
+    \errhelp = \EMsimple
+    \errmessage{Unknown @urefbreakstyle setting `\txiarg'}%
+  \fi\fi\fi
+}
+\def\wordafter{after}
+\def\wordbefore{before}
+\def\wordnone{none}
+
+% Allow a ragged right output to aid breaking long URL's.  There can
+% be a break at the \allowbreak with no extra glue (if the existing stretch in
+% the line is sufficient), a break at the \penalty with extra glue added
+% at the end of the line, or no break at all here.
+%   Changing the value of the penalty and/or the amount of stretch affects how
+% preferable one choice is over the other.
+\def\urefallowbreak{%
+  \penalty0\relax
+  \hskip 0pt plus 2 em\relax
+  \penalty1000\relax
+  \hskip 0pt plus -2 em\relax
+}
+
+\urefbreakstyle after
+
+% @url synonym for @uref, since that's how everyone uses it.
+%
+\let\url=\uref
+
+% rms does not like angle brackets --karl, 17may97.
+% So now @email is just like @uref, unless we are pdf.
+%
+%\def\email#1{\angleleft{\tt #1}\angleright}
+\ifpdforxetex
+  \def\email#1{\doemail#1,,\finish}
+  \def\doemail#1,#2,#3\finish{\begingroup
+    \unsepspaces
+    \pdfurl{mailto:#1}%
+    \setbox0 = \hbox{\ignorespaces #2}%
+    \ifdim\wd0>0pt\unhbox0\else\code{#1}\fi
+    \endlink
+  \endgroup}
+\else
+  \let\email=\uref
+\fi
+
+% @kbdinputstyle -- arg is `distinct' (@kbd uses slanted tty font always),
+%   `example' (@kbd uses ttsl only inside of @example and friends),
+%   or `code' (@kbd uses normal tty font always).
+\parseargdef\kbdinputstyle{%
+  \def\txiarg{#1}%
+  \ifx\txiarg\worddistinct
+    \gdef\kbdexamplefont{\ttsl}\gdef\kbdfont{\ttsl}%
+  \else\ifx\txiarg\wordexample
+    \gdef\kbdexamplefont{\ttsl}\gdef\kbdfont{\tt}%
+  \else\ifx\txiarg\wordcode
+    \gdef\kbdexamplefont{\tt}\gdef\kbdfont{\tt}%
+  \else
+    \errhelp = \EMsimple
+    \errmessage{Unknown @kbdinputstyle setting `\txiarg'}%
+  \fi\fi\fi
+}
+\def\worddistinct{distinct}
+\def\wordexample{example}
+\def\wordcode{code}
+
+% Default is `distinct'.
+\kbdinputstyle distinct
+
+% @kbd is like @code, except that if the argument is just one @key command,
+% then @kbd has no effect.
+\def\kbd#1{{\def\look{#1}\expandafter\kbdsub\look??\par}}
+
+\def\xkey{\key}
+\def\kbdsub#1#2#3\par{%
+  \def\one{#1}\def\three{#3}\def\threex{??}%
+  \ifx\one\xkey\ifx\threex\three \key{#2}%
+  \else{\tclose{\kbdfont\setcodequotes\look}}\fi
+  \else{\tclose{\kbdfont\setcodequotes\look}}\fi
+}
+
+% definition of @key that produces a lozenge.  Doesn't adjust to text size.
+%\setfont\keyrm\rmshape{8}{1000}{OT1}
+%\font\keysy=cmsy9
+%\def\key#1{{\keyrm\textfont2=\keysy \leavevmode\hbox{%
+%  \raise0.4pt\hbox{\angleleft}\kern-.08em\vtop{%
+%    \vbox{\hrule\kern-0.4pt
+%     \hbox{\raise0.4pt\hbox{\vphantom{\angleleft}}#1}}%
+%    \kern-0.4pt\hrule}%
+%  \kern-.06em\raise0.4pt\hbox{\angleright}}}}
+
+% definition of @key with no lozenge.  If the current font is already
+% monospace, don't change it; that way, we respect @kbdinputstyle.  But
+% if it isn't monospace, then use \tt.
+%
+\def\key#1{{\setregularquotes
+  \nohyphenation
+  \ifmonospace\else\tt\fi
+  #1}\null}
+
+% @clicksequence{File @click{} Open ...}
+\def\clicksequence#1{\begingroup #1\endgroup}
+
+% @clickstyle @arrow   (by default)
+\parseargdef\clickstyle{\def\click{#1}}
+\def\click{\arrow}
+
+% Typeset a dimension, e.g., `in' or `pt'.  The only reason for the
+% argument is to make the input look right: @dmn{pt} instead of @dmn{}pt.
+%
+\def\dmn#1{\thinspace #1}
+
+% @acronym for "FBI", "NATO", and the like.
+% We print this one point size smaller, since it's intended for
+% all-uppercase.
+%
+\def\acronym#1{\doacronym #1,,\finish}
+\def\doacronym#1,#2,#3\finish{%
+  {\switchtolsize #1}%
+  \def\temp{#2}%
+  \ifx\temp\empty \else
+    \space ({\unsepspaces \ignorespaces \temp \unskip})%
+  \fi
+  \null % reset \spacefactor=1000
+}
+
+% @abbr for "Comput. J." and the like.
+% No font change, but don't do end-of-sentence spacing.
+%
+\def\abbr#1{\doabbr #1,,\finish}
+\def\doabbr#1,#2,#3\finish{%
+  {\plainfrenchspacing #1}%
+  \def\temp{#2}%
+  \ifx\temp\empty \else
+    \space ({\unsepspaces \ignorespaces \temp \unskip})%
+  \fi
+  \null % reset \spacefactor=1000
+}
+
+% @asis just yields its argument.  Used with @table, for example.
+%
+\def\asis#1{#1}
+
+% @math outputs its argument in math mode.
+%
+% One complication: _ usually means subscripts, but it could also mean
+% an actual _ character, as in @math{@var{some_variable} + 1}.  So make
+% _ active, and distinguish by seeing if the current family is \slfam,
+% which is what @var uses.
+{
+  \catcode`\_ = \active
+  \gdef\mathunderscore{%
+    \catcode`\_=\active
+    \def_{\ifnum\fam=\slfam \_\else\sb\fi}%
+  }
+}
+% Another complication: we want \\ (and @\) to output a math (or tt) \.
+% FYI, plain.tex uses \\ as a temporary control sequence (for no
+% particular reason), but this is not advertised and we don't care.
+%
+% The \mathchar is class=0=ordinary, family=7=ttfam, position=5C=\.
+\def\mathbackslash{\ifnum\fam=\ttfam \mathchar"075C \else\backslash \fi}
+%
+\def\math{%
+  \ifmmode\else % only go into math if not in math mode already
+    \tex
+    \mathunderscore
+    \let\\ = \mathbackslash
+    \mathactive
+    % make the texinfo accent commands work in math mode
+    \let\"=\ddot
+    \let\'=\acute
+    \let\==\bar
+    \let\^=\hat
+    \let\`=\grave
+    \let\u=\breve
+    \let\v=\check
+    \let\~=\tilde
+    \let\dotaccent=\dot
+    % have to provide another name for sup operator
+    \let\mathopsup=\sup
+  $\expandafter\finishmath\fi
+}
+\def\finishmath#1{#1$\endgroup}  % Close the group opened by \tex.
+
+% Some active characters (such as <) are spaced differently in math.
+% We have to reset their definitions in case the @math was an argument
+% to a command which sets the catcodes (such as @item or @section).
+%
+{
+  \catcode`^ = \active
+  \catcode`< = \active
+  \catcode`> = \active
+  \catcode`+ = \active
+  \catcode`' = \active
+  \gdef\mathactive{%
+    \let^ = \ptexhat
+    \let< = \ptexless
+    \let> = \ptexgtr
+    \let+ = \ptexplus
+    \let' = \ptexquoteright
+  }
+}
+
+% for @sub and @sup, if in math mode, just do a normal sub/superscript.
+% If in text, use math to place as sub/superscript, but switch
+% into text mode, with smaller fonts.  This is a different font than the
+% one used for real math sub/superscripts (8pt vs. 7pt), but let's not
+% fix it (significant additions to font machinery) until someone notices.
+%
+\def\sub{\ifmmode \expandafter\sb \else \expandafter\finishsub\fi}
+\def\finishsub#1{$\sb{\hbox{\switchtolllsize #1}}$}%
+%
+\def\sup{\ifmmode \expandafter\ptexsp \else \expandafter\finishsup\fi}
+\def\finishsup#1{$\ptexsp{\hbox{\switchtolllsize #1}}$}%
+
+% provide this command from LaTeX as it is very common
+\def\frac#1#2{{{#1}\over{#2}}}
+
+% @displaymath.
+% \globaldefs is needed to recognize the end lines in \tex and
+% \end tex.  Set \thisenv as @end displaymath is seen before @end tex.
+{\obeylines
+\globaldefs=1
+\envdef\displaymath{%
+\tex%
+\def\thisenv{\displaymath}%
+\begingroup\let\end\displaymathend%
+$$%
+}
+
+\def\displaymathend{$$\endgroup\end}%
+
+\def\Edisplaymath{%
+\def\thisenv{\tex}%
+\end tex
+}}
+
+
+% @inlinefmt{FMTNAME,PROCESSED-TEXT} and @inlineraw{FMTNAME,RAW-TEXT}.
+% Ignore unless FMTNAME == tex; then it is like @iftex and @tex,
+% except specified as a normal braced arg, so no newlines to worry about.
+%
+\def\outfmtnametex{tex}
+%
+\long\def\inlinefmt#1{\doinlinefmt #1,\finish}
+\long\def\doinlinefmt#1,#2,\finish{%
+  \def\inlinefmtname{#1}%
+  \ifx\inlinefmtname\outfmtnametex \ignorespaces #2\fi
+}
+%
+% @inlinefmtifelse{FMTNAME,THEN-TEXT,ELSE-TEXT} expands THEN-TEXT if
+% FMTNAME is tex, else ELSE-TEXT.
+\long\def\inlinefmtifelse#1{\doinlinefmtifelse #1,,,\finish}
+\long\def\doinlinefmtifelse#1,#2,#3,#4,\finish{%
+  \def\inlinefmtname{#1}%
+  \ifx\inlinefmtname\outfmtnametex \ignorespaces #2\else \ignorespaces #3\fi
+}
+%
+% For raw, must switch into @tex before parsing the argument, to avoid
+% setting catcodes prematurely.  Doing it this way means that, for
+% example, @inlineraw{html, foo{bar} gets a parse error instead of being
+% ignored.  But this isn't important because if people want a literal
+% *right* brace they would have to use a command anyway, so they may as
+% well use a command to get a left brace too.  We could re-use the
+% delimiter character idea from \verb, but it seems like overkill.
+%
+\long\def\inlineraw{\tex \doinlineraw}
+\long\def\doinlineraw#1{\doinlinerawtwo #1,\finish}
+\def\doinlinerawtwo#1,#2,\finish{%
+  \def\inlinerawname{#1}%
+  \ifx\inlinerawname\outfmtnametex \ignorespaces #2\fi
+  \endgroup % close group opened by \tex.
+}
+
+% @inlineifset{VAR, TEXT} expands TEXT if VAR is @set.
+%
+\long\def\inlineifset#1{\doinlineifset #1,\finish}
+\long\def\doinlineifset#1,#2,\finish{%
+  \def\inlinevarname{#1}%
+  \expandafter\ifx\csname SET\inlinevarname\endcsname\relax
+  \else\ignorespaces#2\fi
+}
+
+% @inlineifclear{VAR, TEXT} expands TEXT if VAR is not @set.
+%
+\long\def\inlineifclear#1{\doinlineifclear #1,\finish}
+\long\def\doinlineifclear#1,#2,\finish{%
+  \def\inlinevarname{#1}%
+  \expandafter\ifx\csname SET\inlinevarname\endcsname\relax \ignorespaces#2\fi
+}
+
+
+\message{glyphs,}
+% and logos.
+
+% @@ prints an @, as does @atchar{}.
+\def\@{\char64 }
+\let\atchar=\@
+
+% @{ @} @lbracechar{} @rbracechar{} all generate brace characters.
+\def\lbracechar{{\ifmonospace\char123\else\ensuremath\lbrace\fi}}
+\def\rbracechar{{\ifmonospace\char125\else\ensuremath\rbrace\fi}}
+\let\{=\lbracechar
+\let\}=\rbracechar
+
+% @comma{} to avoid , parsing problems.
+\let\comma = ,
+
+% Accents: @, @dotaccent @ringaccent @ubaraccent @udotaccent
+% Others are defined by plain TeX: @` @' @" @^ @~ @= @u @v @H.
+\let\, = \ptexc
+\let\dotaccent = \ptexdot
+\def\ringaccent#1{{\accent23 #1}}
+\let\tieaccent = \ptext
+\let\ubaraccent = \ptexb
+\let\udotaccent = \d
+
+% Other special characters: @questiondown @exclamdown @ordf @ordm
+% Plain TeX defines: @AA @AE @O @OE @L (plus lowercase versions) @ss.
+\def\questiondown{?`}
+\def\exclamdown{!`}
+\def\ordf{\leavevmode\raise1ex\hbox{\switchtolllsize \underbar{a}}}
+\def\ordm{\leavevmode\raise1ex\hbox{\switchtolllsize \underbar{o}}}
+
+% Dotless i and dotless j, used for accents.
+\def\imacro{i}
+\def\jmacro{j}
+\def\dotless#1{%
+  \def\temp{#1}%
+  \ifx\temp\imacro \ifmmode\imath \else\ptexi \fi
+  \else\ifx\temp\jmacro \ifmmode\jmath \else\j \fi
+  \else \errmessage{@dotless can be used only with i or j}%
+  \fi\fi
+}
+
+% The \TeX{} logo, as in plain, but resetting the spacing so that a
+% period following counts as ending a sentence.  (Idea found in latex.)
+%
+\edef\TeX{\TeX \spacefactor=1000 }
+
+% @LaTeX{} logo.  Not quite the same results as the definition in
+% latex.ltx, since we use a different font for the raised A; it's most
+% convenient for us to use an explicitly smaller font, rather than using
+% the \scriptstyle font (since we don't reset \scriptstyle and
+% \scriptscriptstyle).
+%
+\def\LaTeX{%
+  L\kern-.36em
+  {\setbox0=\hbox{T}%
+   \vbox to \ht0{\hbox{%
+     \ifx\textnominalsize\xwordpt
+       % for 10pt running text, lllsize (8pt) is too small for the A in LaTeX.
+       % Revert to plain's \scriptsize, which is 7pt.
+       \count255=\the\fam $\fam\count255 \scriptstyle A$%
+     \else
+       % For 11pt, we can use our lllsize.
+       \switchtolllsize A%
+     \fi
+     }%
+     \vss
+  }}%
+  \kern-.15em
+  \TeX
+}
+
+% Some math mode symbols.  Define \ensuremath to switch into math mode
+% unless we are already there.  Expansion tricks may not be needed here,
+% but safer, and can't hurt.
+\def\ensuremath{\ifmmode \expandafter\asis \else\expandafter\ensuredmath \fi}
+\def\ensuredmath#1{$\relax#1$}
+%
+\def\bullet{\ensuremath\ptexbullet}
+\def\geq{\ensuremath\ge}
+\def\leq{\ensuremath\le}
+\def\minus{\ensuremath-}
+
+% @dots{} outputs an ellipsis using the current font.
+% We do .5em per period so that it has the same spacing in the cm
+% typewriter fonts as three actual period characters; on the other hand,
+% in other typewriter fonts three periods are wider than 1.5em.  So do
+% whichever is larger.
+%
+\def\dots{%
+  \leavevmode
+  \setbox0=\hbox{...}% get width of three periods
+  \ifdim\wd0 > 1.5em
+    \dimen0 = \wd0
+  \else
+    \dimen0 = 1.5em
+  \fi
+  \hbox to \dimen0{%
+    \hskip 0pt plus.25fil
+    .\hskip 0pt plus1fil
+    .\hskip 0pt plus1fil
+    .\hskip 0pt plus.5fil
+  }%
+}
+
+% @enddots{} is an end-of-sentence ellipsis.
+%
+\def\enddots{%
+  \dots
+  \spacefactor=\endofsentencespacefactor
+}
+
+% @point{}, @result{}, @expansion{}, @print{}, @equiv{}.
+%
+% Since these characters are used in examples, they should be an even number of
+% \tt widths. Each \tt character is 1en, so two makes it 1em.
+%
+\def\point{$\star$}
+\def\arrow{\leavevmode\raise.05ex\hbox to 1em{\hfil$\rightarrow$\hfil}}
+\def\result{\leavevmode\raise.05ex\hbox to 1em{\hfil$\Rightarrow$\hfil}}
+\def\expansion{\leavevmode\hbox to 1em{\hfil$\mapsto$\hfil}}
+\def\print{\leavevmode\lower.1ex\hbox to 1em{\hfil$\dashv$\hfil}}
+\def\equiv{\leavevmode\hbox to 1em{\hfil$\ptexequiv$\hfil}}
+
+% The @error{} command.
+% Adapted from the TeXbook's \boxit.
+%
+\newbox\errorbox
+%
+{\ttfont \global\dimen0 = 3em}% Width of the box.
+\dimen2 = .55pt % Thickness of rules
+% The text. (`r' is open on the right, `e' somewhat less so on the left.)
+\setbox0 = \hbox{\kern-.75pt \reducedsf \putworderror\kern-1.5pt}
+%
+\setbox\errorbox=\hbox to \dimen0{\hfil
+   \hsize = \dimen0 \advance\hsize by -5.8pt % Space to left+right.
+   \advance\hsize by -2\dimen2 % Rules.
+   \vbox{%
+      \hrule height\dimen2
+      \hbox{\vrule width\dimen2 \kern3pt          % Space to left of text.
+         \vtop{\kern2.4pt \box0 \kern2.4pt}% Space above/below.
+         \kern3pt\vrule width\dimen2}% Space to right.
+      \hrule height\dimen2}
+    \hfil}
+%
+\def\error{\leavevmode\lower.7ex\copy\errorbox}
+
+% @pounds{} is a sterling sign, which Knuth put in the CM italic font.
+%
+\def\pounds{\ifmonospace{\ecfont\char"BF}\else{\it\$}\fi}
+
+% @euro{} comes from a separate font, depending on the current style.
+% We use the free feym* fonts from the eurosym package by Henrik
+% Theiling, which support regular, slanted, bold and bold slanted (and
+% "outlined" (blackboard board, sort of) versions, which we don't need).
+% It is available from http://www.ctan.org/tex-archive/fonts/eurosym.
+%
+% Although only regular is the truly official Euro symbol, we ignore
+% that.  The Euro is designed to be slightly taller than the regular
+% font height.
+%
+% feymr - regular
+% feymo - slanted
+% feybr - bold
+% feybo - bold slanted
+%
+% There is no good (free) typewriter version, to my knowledge.
+% A feymr10 euro is ~7.3pt wide, while a normal cmtt10 char is ~5.25pt wide.
+% Hmm.
+%
+% Also doesn't work in math.  Do we need to do math with euro symbols?
+% Hope not.
+%
+%
+\def\euro{{\eurofont e}}
+\def\eurofont{%
+  % We set the font at each command, rather than predefining it in
+  % \textfonts and the other font-switching commands, so that
+  % installations which never need the symbol don't have to have the
+  % font installed.
+  %
+  % There is only one designed size (nominal 10pt), so we always scale
+  % that to the current nominal size.
+  %
+  % By the way, simply using "at 1em" works for cmr10 and the like, but
+  % does not work for cmbx10 and other extended/shrunken fonts.
+  %
+  \def\eurosize{\csname\curfontsize nominalsize\endcsname}%
+  %
+  \ifx\curfontstyle\bfstylename
+    % bold:
+    \font\thiseurofont = \ifusingit{feybo10}{feybr10} at \eurosize
+  \else
+    % regular:
+    \font\thiseurofont = \ifusingit{feymo10}{feymr10} at \eurosize
+  \fi
+  \thiseurofont
+}
+
+% Glyphs from the EC fonts.  We don't use \let for the aliases, because
+% sometimes we redefine the original macro, and the alias should reflect
+% the redefinition.
+%
+% Use LaTeX names for the Icelandic letters.
+\def\DH{{\ecfont \char"D0}} % Eth
+\def\dh{{\ecfont \char"F0}} % eth
+\def\TH{{\ecfont \char"DE}} % Thorn
+\def\th{{\ecfont \char"FE}} % thorn
+%
+\def\guillemetleft{{\ecfont \char"13}}
+\def\guillemotleft{\guillemetleft}
+\def\guillemetright{{\ecfont \char"14}}
+\def\guillemotright{\guillemetright}
+\def\guilsinglleft{{\ecfont \char"0E}}
+\def\guilsinglright{{\ecfont \char"0F}}
+\def\quotedblbase{{\ecfont \char"12}}
+\def\quotesinglbase{{\ecfont \char"0D}}
+%
+% This positioning is not perfect (see the ogonek LaTeX package), but
+% we have the precomposed glyphs for the most common cases.  We put the
+% tests to use those glyphs in the single \ogonek macro so we have fewer
+% dummy definitions to worry about for index entries, etc.
+%
+% ogonek is also used with other letters in Lithuanian (IOU), but using
+% the precomposed glyphs for those is not so easy since they aren't in
+% the same EC font.
+\def\ogonek#1{{%
+  \def\temp{#1}%
+  \ifx\temp\macrocharA\Aogonek
+  \else\ifx\temp\macrochara\aogonek
+  \else\ifx\temp\macrocharE\Eogonek
+  \else\ifx\temp\macrochare\eogonek
+  \else
+    \ecfont \setbox0=\hbox{#1}%
+    \ifdim\ht0=1ex\accent"0C #1%
+    \else\ooalign{\unhbox0\crcr\hidewidth\char"0C \hidewidth}%
+    \fi
+  \fi\fi\fi\fi
+  }%
+}
+\def\Aogonek{{\ecfont \char"81}}\def\macrocharA{A}
+\def\aogonek{{\ecfont \char"A1}}\def\macrochara{a}
+\def\Eogonek{{\ecfont \char"86}}\def\macrocharE{E}
+\def\eogonek{{\ecfont \char"A6}}\def\macrochare{e}
+%
+% Use the European Computer Modern fonts (cm-super in outline format)
+% for non-CM glyphs.  That is ec* for regular text and tc* for the text
+% companion symbols (LaTeX TS1 encoding).  Both are part of the ec
+% package and follow the same conventions.
+%
+\def\ecfont{\etcfont{e}}
+\def\tcfont{\etcfont{t}}
+%
+\def\etcfont#1{%
+  % We can't distinguish serif/sans and italic/slanted, but this
+  % is used for crude hacks anyway (like adding French and German
+  % quotes to documents typeset with CM, where we lose kerning), so
+  % hopefully nobody will notice/care.
+  \edef\ecsize{\csname\curfontsize ecsize\endcsname}%
+  \edef\nominalsize{\csname\curfontsize nominalsize\endcsname}%
+  \ifmonospace
+    % typewriter:
+    \font\thisecfont = #1ctt\ecsize \space at \nominalsize
+  \else
+    \ifx\curfontstyle\bfstylename
+      % bold:
+      \font\thisecfont = #1cb\ifusingit{i}{x}\ecsize \space at \nominalsize
+    \else
+      % regular:
+      \font\thisecfont = #1c\ifusingit{ti}{rm}\ecsize \space at \nominalsize
+    \fi
+  \fi
+  \thisecfont
+}
+
+% @registeredsymbol - R in a circle.  The font for the R should really
+% be smaller yet, but lllsize is the best we can do for now.
+% Adapted from the plain.tex definition of \copyright.
+%
+\def\registeredsymbol{%
+  $^{{\ooalign{\hfil\raise.07ex\hbox{\switchtolllsize R}%
+               \hfil\crcr\Orb}}%
+    }$%
+}
+
+% @textdegree - the normal degrees sign.
+%
+\def\textdegree{$^\circ$}
+
+% Laurent Siebenmann reports \Orb undefined with:
+%  Textures 1.7.7 (preloaded format=plain 93.10.14)  (68K)  16 APR 2004 02:38
+% so we'll define it if necessary.
+%
+\ifx\Orb\thisisundefined
+\def\Orb{\mathhexbox20D}
+\fi
+
+% Quotes.
+\chardef\quoteleft=`\`
+\chardef\quoteright=`\'
+
+% only change font for tt for correct kerning and to avoid using
+% \ecfont unless necessary.
+\def\quotedblleft{%
+  \ifmonospace{\ecfont\char"10}\else{\char"5C}\fi
+}
+
+\def\quotedblright{%
+  \ifmonospace{\ecfont\char"11}\else{\char`\"}\fi
+}
+
+
+\message{page headings,}
+
+\newskip\titlepagetopglue \titlepagetopglue = 1.5in
+\newskip\titlepagebottomglue \titlepagebottomglue = 2pc
+
+% First the title page.  Must do @settitle before @titlepage.
+\newif\ifseenauthor
+\newif\iffinishedtitlepage
+
+% @setcontentsaftertitlepage used to do an implicit @contents or
+% @shortcontents after @end titlepage, but it is now obsolete.
+\def\setcontentsaftertitlepage{%
+  \errmessage{@setcontentsaftertitlepage has been removed as a Texinfo
+              command; move your @contents command if you want the contents
+              after the title page.}}%
+\def\setshortcontentsaftertitlepage{%
+  \errmessage{@setshortcontentsaftertitlepage has been removed as a Texinfo
+              command; move your @shortcontents and @contents commands if you
+              want the contents after the title page.}}%
+
+\parseargdef\shorttitlepage{%
+  \begingroup \hbox{}\vskip 1.5in \chaprm \centerline{#1}%
+  \endgroup\page\hbox{}\page}
+
+\envdef\titlepage{%
+  % Open one extra group, as we want to close it in the middle of \Etitlepage.
+  \begingroup
+    \parindent=0pt \textfonts
+    % Leave some space at the very top of the page.
+    \vglue\titlepagetopglue
+    % No rule at page bottom unless we print one at the top with @title.
+    \finishedtitlepagetrue
+    %
+    % Most title ``pages'' are actually two pages long, with space
+    % at the top of the second.  We don't want the ragged left on the second.
+    \let\oldpage = \page
+    \def\page{%
+      \iffinishedtitlepage\else
+	 \finishtitlepage
+      \fi
+      \let\page = \oldpage
+      \page
+      \null
+    }%
+}
+
+\def\Etitlepage{%
+    \iffinishedtitlepage\else
+	\finishtitlepage
+    \fi
+    % It is important to do the page break before ending the group,
+    % because the headline and footline are only empty inside the group.
+    % If we use the new definition of \page, we always get a blank page
+    % after the title page, which we certainly don't want.
+    \oldpage
+  \endgroup
+  %
+  % Need this before the \...aftertitlepage checks so that if they are
+  % in effect the toc pages will come out with page numbers.
+  \HEADINGSon
+}
+
+\def\finishtitlepage{%
+  \vskip4pt \hrule height 2pt width \hsize
+  \vskip\titlepagebottomglue
+  \finishedtitlepagetrue
+}
+
+% Settings used for typesetting titles: no hyphenation, no indentation,
+% don't worry much about spacing, ragged right.  This should be used
+% inside a \vbox, and fonts need to be set appropriately first. \par should
+% be specified before the end of the \vbox, since a vbox is a group.
+%
+\def\raggedtitlesettings{%
+  \rm
+  \hyphenpenalty=10000
+  \parindent=0pt
+  \tolerance=5000
+  \ptexraggedright
+}
+
+% Macros to be used within @titlepage:
+
+\let\subtitlerm=\rmfont
+\def\subtitlefont{\subtitlerm \normalbaselineskip = 13pt \normalbaselines}
+
+\parseargdef\title{%
+  \checkenv\titlepage
+  \vbox{\titlefonts \raggedtitlesettings #1\par}%
+  % print a rule at the page bottom also.
+  \finishedtitlepagefalse
+  \vskip4pt \hrule height 4pt width \hsize \vskip4pt
+}
+
+\parseargdef\subtitle{%
+  \checkenv\titlepage
+  {\subtitlefont \rightline{#1}}%
+}
+
+% @author should come last, but may come many times.
+% It can also be used inside @quotation.
+%
+\parseargdef\author{%
+  \def\temp{\quotation}%
+  \ifx\thisenv\temp
+    \def\quotationauthor{#1}% printed in \Equotation.
+  \else
+    \checkenv\titlepage
+    \ifseenauthor\else \vskip 0pt plus 1filll \seenauthortrue \fi
+    {\secfonts\rm \leftline{#1}}%
+  \fi
+}
+
+
+% Set up page headings and footings.
+
+\let\thispage=\folio
+
+\newtoks\evenheadline    % headline on even pages
+\newtoks\oddheadline     % headline on odd pages
+\newtoks\evenchapheadline% headline on even pages with a new chapter
+\newtoks\oddchapheadline % headline on odd pages with a new chapter
+\newtoks\evenfootline    % footline on even pages
+\newtoks\oddfootline     % footline on odd pages
+
+% Now make \makeheadline and \makefootline in Plain TeX use those variables
+\headline={{\textfonts\rm
+            \ifchapterpage
+              \ifodd\pageno\the\oddchapheadline\else\the\evenchapheadline\fi
+            \else
+              \ifodd\pageno\the\oddheadline\else\the\evenheadline\fi
+            \fi}}
+
+\footline={{\textfonts\rm \ifodd\pageno \the\oddfootline
+                            \else \the\evenfootline \fi}\HEADINGShook}
+\let\HEADINGShook=\relax
+
+% Commands to set those variables.
+% For example, this is what  @headings on  does
+% @evenheading @thistitle|@thispage|@thischapter
+% @oddheading @thischapter|@thispage|@thistitle
+% @evenfooting @thisfile||
+% @oddfooting ||@thisfile
+
+
+\def\evenheading{\parsearg\evenheadingxxx}
+\def\evenheadingxxx #1{\evenheadingyyy #1\|\|\|\|\finish}
+\def\evenheadingyyy #1\|#2\|#3\|#4\finish{%
+  \global\evenheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}
+  \global\evenchapheadline=\evenheadline}
+
+\def\oddheading{\parsearg\oddheadingxxx}
+\def\oddheadingxxx #1{\oddheadingyyy #1\|\|\|\|\finish}
+\def\oddheadingyyy #1\|#2\|#3\|#4\finish{%
+  \global\oddheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}%
+  \global\oddchapheadline=\oddheadline}
+
+\parseargdef\everyheading{\oddheadingxxx{#1}\evenheadingxxx{#1}}%
+
+\def\evenfooting{\parsearg\evenfootingxxx}
+\def\evenfootingxxx #1{\evenfootingyyy #1\|\|\|\|\finish}
+\def\evenfootingyyy #1\|#2\|#3\|#4\finish{%
+\global\evenfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
+
+\def\oddfooting{\parsearg\oddfootingxxx}
+\def\oddfootingxxx #1{\oddfootingyyy #1\|\|\|\|\finish}
+\def\oddfootingyyy #1\|#2\|#3\|#4\finish{%
+  \global\oddfootline = {\rlap{\centerline{#2}}\line{#1\hfil#3}}%
+  %
+  % Leave some space for the footline.  Hopefully ok to assume
+  % @evenfooting will not be used by itself.
+  \global\advance\txipageheight by -12pt
+  \global\advance\vsize by -12pt
+}
+
+\parseargdef\everyfooting{\oddfootingxxx{#1}\evenfootingxxx{#1}}
+
+% @evenheadingmarks top     \thischapter <- chapter at the top of a page
+% @evenheadingmarks bottom  \thischapter <- chapter at the bottom of a page
+%
+% The same set of arguments for:
+%
+% @oddheadingmarks
+% @evenfootingmarks
+% @oddfootingmarks
+% @everyheadingmarks
+% @everyfootingmarks
+
+% These define \getoddheadingmarks, \getevenheadingmarks,
+% \getoddfootingmarks, and \getevenfootingmarks, each to one of
+% \gettopheadingmarks, \getbottomheadingmarks.
+%
+\def\evenheadingmarks{\headingmarks{even}{heading}}
+\def\oddheadingmarks{\headingmarks{odd}{heading}}
+\def\evenfootingmarks{\headingmarks{even}{footing}}
+\def\oddfootingmarks{\headingmarks{odd}{footing}}
+\parseargdef\everyheadingmarks{\headingmarks{even}{heading}{#1}
+                          \headingmarks{odd}{heading}{#1} }
+\parseargdef\everyfootingmarks{\headingmarks{even}{footing}{#1}
+                          \headingmarks{odd}{footing}{#1} }
+% #1 = even/odd, #2 = heading/footing, #3 = top/bottom.
+\def\headingmarks#1#2#3 {%
+  \expandafter\let\expandafter\temp \csname get#3headingmarks\endcsname
+  \global\expandafter\let\csname get#1#2marks\endcsname \temp
+}
+
+\everyheadingmarks bottom
+\everyfootingmarks bottom
+
+% @headings double      turns headings on for double-sided printing.
+% @headings single      turns headings on for single-sided printing.
+% @headings off         turns them off.
+% @headings on          same as @headings double, retained for compatibility.
+% @headings after       turns on double-sided headings after this page.
+% @headings doubleafter turns on double-sided headings after this page.
+% @headings singleafter turns on single-sided headings after this page.
+% By default, they are off at the start of a document,
+% and turned `on' after @end titlepage.
+
+\parseargdef\headings{\csname HEADINGS#1\endcsname}
+
+\def\headingsoff{% non-global headings elimination
+  \evenheadline={\hfil}\evenfootline={\hfil}\evenchapheadline={\hfil}%
+   \oddheadline={\hfil}\oddfootline={\hfil}\oddchapheadline={\hfil}%
+}
+
+\def\HEADINGSoff{{\globaldefs=1 \headingsoff}} % global setting
+\HEADINGSoff  % it's the default
+
+% When we turn headings on, set the page number to 1.
+\def\pageone{
+  \global\pageno=1
+  \global\arabiccount = \pagecount
+}
+
+% For double-sided printing, put current file name in lower left corner,
+% chapter name on inside top of right hand pages, document
+% title on inside top of left hand pages, and page numbers on outside top
+% edge of all pages.
+\def\HEADINGSdouble{%
+\pageone
+\HEADINGSdoublex
+}
+\let\contentsalignmacro = \chappager
+
+% For single-sided printing, chapter title goes across top left of page,
+% page number on top right.
+\def\HEADINGSsingle{%
+\pageone
+\HEADINGSsinglex
+}
+\def\HEADINGSon{\HEADINGSdouble}
+
+\def\HEADINGSafter{\let\HEADINGShook=\HEADINGSdoublex}
+\let\HEADINGSdoubleafter=\HEADINGSafter
+\def\HEADINGSdoublex{%
+\global\evenfootline={\hfil}
+\global\oddfootline={\hfil}
+\global\evenheadline={\line{\folio\hfil\thistitle}}
+\global\oddheadline={\line{\thischapter\hfil\folio}}
+\global\evenchapheadline={\line{\folio\hfil}}
+\global\oddchapheadline={\line{\hfil\folio}}
+\global\let\contentsalignmacro = \chapoddpage
+}
+
+\def\HEADINGSsingleafter{\let\HEADINGShook=\HEADINGSsinglex}
+\def\HEADINGSsinglex{%
+\global\evenfootline={\hfil}
+\global\oddfootline={\hfil}
+\global\evenheadline={\line{\thischapter\hfil\folio}}
+\global\oddheadline={\line{\thischapter\hfil\folio}}
+\global\evenchapheadline={\line{\hfil\folio}}
+\global\oddchapheadline={\line{\hfil\folio}}
+\global\let\contentsalignmacro = \chappager
+}
+
+% for @setchapternewpage off
+\def\HEADINGSsinglechapoff{%
+\pageone
+\global\evenfootline={\hfil}
+\global\oddfootline={\hfil}
+\global\evenheadline={\line{\thischapter\hfil\folio}}
+\global\oddheadline={\line{\thischapter\hfil\folio}}
+\global\evenchapheadline=\evenheadline
+\global\oddchapheadline=\oddheadline
+\global\let\contentsalignmacro = \chappager
+}
+
+% Subroutines used in generating headings
+% This produces Day Month Year style of output.
+% Only define if not already defined, in case a txi-??.tex file has set
+% up a different format (e.g., txi-cs.tex does this).
+\ifx\today\thisisundefined
+\def\today{%
+  \number\day\space
+  \ifcase\month
+  \or\putwordMJan\or\putwordMFeb\or\putwordMMar\or\putwordMApr
+  \or\putwordMMay\or\putwordMJun\or\putwordMJul\or\putwordMAug
+  \or\putwordMSep\or\putwordMOct\or\putwordMNov\or\putwordMDec
+  \fi
+  \space\number\year}
+\fi
+
+% @settitle line...  specifies the title of the document, for headings.
+% It generates no output of its own.
+\def\thistitle{\putwordNoTitle}
+\def\settitle{\parsearg{\gdef\thistitle}}
+
+
+\message{tables,}
+% Tables -- @table, @ftable, @vtable, @item(x).
+
+% default indentation of table text
+\newdimen\tableindent \tableindent=.8in
+% default indentation of @itemize and @enumerate text
+\newdimen\itemindent  \itemindent=.3in
+% margin between end of table item and start of table text.
+\newdimen\itemmargin  \itemmargin=.1in
+
+% used internally for \itemindent minus \itemmargin
+\newdimen\itemmax
+
+% Note @table, @ftable, and @vtable define @item, @itemx, etc., with
+% these defs.
+% They also define \itemindex
+% to index the item name in whatever manner is desired (perhaps none).
+
+\newif\ifitemxneedsnegativevskip
+
+\def\itemxpar{\par\ifitemxneedsnegativevskip\nobreak\vskip-\parskip\nobreak\fi}
+
+\def\internalBitem{\smallbreak \parsearg\itemzzz}
+\def\internalBitemx{\itemxpar \parsearg\itemzzz}
+
+\def\itemzzz #1{\begingroup %
+  \advance\hsize by -\rightskip
+  \advance\hsize by -\tableindent
+  \setbox0=\hbox{\itemindicate{#1}}%
+  \itemindex{#1}%
+  \nobreak % This prevents a break before @itemx.
+  %
+  % If the item text does not fit in the space we have, put it on a line
+  % by itself, and do not allow a page break either before or after that
+  % line.  We do not start a paragraph here because then if the next
+  % command is, e.g., @kindex, the whatsit would get put into the
+  % horizontal list on a line by itself, resulting in extra blank space.
+  \ifdim \wd0>\itemmax
+    %
+    % Make this a paragraph so we get the \parskip glue and wrapping,
+    % but leave it ragged-right.
+    \begingroup
+      \advance\leftskip by-\tableindent
+      \advance\hsize by\tableindent
+      \advance\rightskip by0pt plus1fil\relax
+      \leavevmode\unhbox0\par
+    \endgroup
+    %
+    % We're going to be starting a paragraph, but we don't want the
+    % \parskip glue -- logically it's part of the @item we just started.
+    \nobreak \vskip-\parskip
+    %
+    % Stop a page break at the \parskip glue coming up.  However, if
+    % what follows is an environment such as @example, there will be no
+    % \parskip glue; then the negative vskip we just inserted would
+    % cause the example and the item to crash together.  So we use this
+    % bizarre value of 10001 as a signal to \aboveenvbreak to insert
+    % \parskip glue after all.  Section titles are handled this way also.
+    %
+    \penalty 10001
+    \endgroup
+    \itemxneedsnegativevskipfalse
+  \else
+    % The item text fits into the space.  Start a paragraph, so that the
+    % following text (if any) will end up on the same line.
+    \noindent
+    % Do this with kerns and \unhbox so that if there is a footnote in
+    % the item text, it can migrate to the main vertical list and
+    % eventually be printed.
+    \nobreak\kern-\tableindent
+    \dimen0 = \itemmax  \advance\dimen0 by \itemmargin \advance\dimen0 by -\wd0
+    \unhbox0
+    \nobreak\kern\dimen0
+    \endgroup
+    \itemxneedsnegativevskiptrue
+  \fi
+}
+
+\def\item{\errmessage{@item while not in a list environment}}
+\def\itemx{\errmessage{@itemx while not in a list environment}}
+
+% @table, @ftable, @vtable.
+\envdef\table{%
+  \let\itemindex\gobble
+  \tablecheck{table}%
+}
+\envdef\ftable{%
+  \def\itemindex ##1{\doind {fn}{\code{##1}}}%
+  \tablecheck{ftable}%
+}
+\envdef\vtable{%
+  \def\itemindex ##1{\doind {vr}{\code{##1}}}%
+  \tablecheck{vtable}%
+}
+\def\tablecheck#1{%
+  \ifnum \the\catcode`\^^M=\active
+    \endgroup
+    \errmessage{This command won't work in this context; perhaps the problem is
+      that we are \inenvironment\thisenv}%
+    \def\next{\doignore{#1}}%
+  \else
+    \let\next\tablex
+  \fi
+  \next
+}
+\def\tablex#1{%
+  \def\itemindicate{#1}%
+  \parsearg\tabley
+}
+\def\tabley#1{%
+  {%
+    \makevalueexpandable
+    \edef\temp{\noexpand\tablez #1\space\space\space}%
+    \expandafter
+  }\temp \endtablez
+}
+\def\tablez #1 #2 #3 #4\endtablez{%
+  \aboveenvbreak
+  \ifnum 0#1>0 \advance \leftskip by #1\mil \fi
+  \ifnum 0#2>0 \tableindent=#2\mil \fi
+  \ifnum 0#3>0 \advance \rightskip by #3\mil \fi
+  \itemmax=\tableindent
+  \advance \itemmax by -\itemmargin
+  \advance \leftskip by \tableindent
+  \exdentamount=\tableindent
+  \parindent = 0pt
+  \parskip = \smallskipamount
+  \ifdim \parskip=0pt \parskip=2pt \fi
+  \let\item = \internalBitem
+  \let\itemx = \internalBitemx
+}
+\def\Etable{\endgraf\afterenvbreak}
+\let\Eftable\Etable
+\let\Evtable\Etable
+\let\Eitemize\Etable
+\let\Eenumerate\Etable
+
+% This is the counter used by @enumerate, which is really @itemize
+
+\newcount \itemno
+
+\envdef\itemize{\parsearg\doitemize}
+
+\def\doitemize#1{%
+  \aboveenvbreak
+  \itemmax=\itemindent
+  \advance\itemmax by -\itemmargin
+  \advance\leftskip by \itemindent
+  \exdentamount=\itemindent
+  \parindent=0pt
+  \parskip=\smallskipamount
+  \ifdim\parskip=0pt \parskip=2pt \fi
+  %
+  % Try typesetting the item mark so that if the document erroneously says
+  % something like @itemize @samp (intending @table), there's an error
+  % right away at the @itemize.  It's not the best error message in the
+  % world, but it's better than leaving it to the @item.  This means if
+  % the user wants an empty mark, they have to say @w{} not just @w.
+  \def\itemcontents{#1}%
+  \setbox0 = \hbox{\itemcontents}%
+  %
+  % @itemize with no arg is equivalent to @itemize @bullet.
+  \ifx\itemcontents\empty\def\itemcontents{\bullet}\fi
+  %
+  \let\item=\itemizeitem
+}
+
+% Definition of @item while inside @itemize and @enumerate.
+%
+\def\itemizeitem{%
+  \advance\itemno by 1  % for enumerations
+  {\let\par=\endgraf \smallbreak}% reasonable place to break
+  {%
+   % If the document has an @itemize directly after a section title, a
+   % \nobreak will be last on the list, and \sectionheading will have
+   % done a \vskip-\parskip.  In that case, we don't want to zero
+   % parskip, or the item text will crash with the heading.  On the
+   % other hand, when there is normal text preceding the item (as there
+   % usually is), we do want to zero parskip, or there would be too much
+   % space.  In that case, we won't have a \nobreak before.  At least
+   % that's the theory.
+   \ifnum\lastpenalty<10000 \parskip=0in \fi
+   \noindent
+   \hbox to 0pt{\hss \itemcontents \kern\itemmargin}%
+   %
+   \ifinner\else
+     \vadjust{\penalty 1200}% not good to break after first line of item.
+   \fi
+   % We can be in inner vertical mode in a footnote, although an
+   % @itemize looks awful there.
+  }%
+  \flushcr
+}
+
+% \splitoff TOKENS\endmark defines \first to be the first token in
+% TOKENS, and \rest to be the remainder.
+%
+\def\splitoff#1#2\endmark{\def\first{#1}\def\rest{#2}}%
+
+% Allow an optional argument of an uppercase letter, lowercase letter,
+% or number, to specify the first label in the enumerated list.  No
+% argument is the same as `1'.
+%
+\envparseargdef\enumerate{\enumeratey #1  \endenumeratey}
+\def\enumeratey #1 #2\endenumeratey{%
+  % If we were given no argument, pretend we were given `1'.
+  \def\thearg{#1}%
+  \ifx\thearg\empty \def\thearg{1}\fi
+  %
+  % Detect if the argument is a single token.  If so, it might be a
+  % letter.  Otherwise, the only valid thing it can be is a number.
+  % (We will always have one token, because of the test we just made.
+  % This is a good thing, since \splitoff doesn't work given nothing at
+  % all -- the first parameter is undelimited.)
+  \expandafter\splitoff\thearg\endmark
+  \ifx\rest\empty
+    % Only one token in the argument.  It could still be anything.
+    % A ``lowercase letter'' is one whose \lccode is nonzero.
+    % An ``uppercase letter'' is one whose \lccode is both nonzero, and
+    %   not equal to itself.
+    % Otherwise, we assume it's a number.
+    %
+    % We need the \relax at the end of the \ifnum lines to stop TeX from
+    % continuing to look for a <number>.
+    %
+    \ifnum\lccode\expandafter`\thearg=0\relax
+      \numericenumerate % a number (we hope)
+    \else
+      % It's a letter.
+      \ifnum\lccode\expandafter`\thearg=\expandafter`\thearg\relax
+        \lowercaseenumerate % lowercase letter
+      \else
+        \uppercaseenumerate % uppercase letter
+      \fi
+    \fi
+  \else
+    % Multiple tokens in the argument.  We hope it's a number.
+    \numericenumerate
+  \fi
+}
+
+% An @enumerate whose labels are integers.  The starting integer is
+% given in \thearg.
+%
+\def\numericenumerate{%
+  \itemno = \thearg
+  \startenumeration{\the\itemno}%
+}
+
+% The starting (lowercase) letter is in \thearg.
+\def\lowercaseenumerate{%
+  \itemno = \expandafter`\thearg
+  \startenumeration{%
+    % Be sure we're not beyond the end of the alphabet.
+    \ifnum\itemno=0
+      \errmessage{No more lowercase letters in @enumerate; get a bigger
+                  alphabet}%
+    \fi
+    \char\lccode\itemno
+  }%
+}
+
+% The starting (uppercase) letter is in \thearg.
+\def\uppercaseenumerate{%
+  \itemno = \expandafter`\thearg
+  \startenumeration{%
+    % Be sure we're not beyond the end of the alphabet.
+    \ifnum\itemno=0
+      \errmessage{No more uppercase letters in @enumerate; get a bigger
+                  alphabet}
+    \fi
+    \char\uccode\itemno
+  }%
+}
+
+% Call \doitemize, adding a period to the first argument and supplying the
+% common last two arguments.  Also subtract one from the initial value in
+% \itemno, since @item increments \itemno.
+%
+\def\startenumeration#1{%
+  \advance\itemno by -1
+  \doitemize{#1.}\flushcr
+}
+
+
+% @multitable macros
+
+% Macros used to set up halign preamble:
+%
+\let\endsetuptable\relax
+\def\xendsetuptable{\endsetuptable}
+\let\columnfractions\relax
+\def\xcolumnfractions{\columnfractions}
+\newif\ifsetpercent
+
+% #1 is the @columnfraction, usually a decimal number like .5, but might
+% be just 1.  We just use it, whatever it is.
+%
+\def\pickupwholefraction#1 {%
+  \global\advance\colcount by 1
+  \expandafter\xdef\csname col\the\colcount\endcsname{#1\hsize}%
+  \setuptable
+}
+
+\newcount\colcount
+\def\setuptable#1{%
+  \def\firstarg{#1}%
+  \ifx\firstarg\xendsetuptable
+    \let\go = \relax
+  \else
+    \ifx\firstarg\xcolumnfractions
+      \global\setpercenttrue
+    \else
+      \ifsetpercent
+         \let\go\pickupwholefraction
+      \else
+         \global\advance\colcount by 1
+         \setbox0=\hbox{#1\unskip\space}% Add a normal word space as a
+                   % separator; typically that is always in the input, anyway.
+         \expandafter\xdef\csname col\the\colcount\endcsname{\the\wd0}%
+      \fi
+    \fi
+    \ifx\go\pickupwholefraction
+      % Put the argument back for the \pickupwholefraction call, so
+      % we'll always have a period there to be parsed.
+      \def\go{\pickupwholefraction#1}%
+    \else
+      \let\go = \setuptable
+    \fi%
+  \fi
+  \go
+}
+
+% @headitem starts a heading row, which we typeset in bold.  Assignments
+% have to be global since we are inside the implicit group of an
+% alignment entry.  \everycr below resets \everytab so we don't have to
+% undo it ourselves.
+\def\headitemfont{\b}% for people to use in the template row; not changeable
+\def\headitem{%
+  \checkenv\multitable
+  \crcr
+  \gdef\headitemcrhook{\nobreak}% attempt to avoid page break after headings
+  \global\everytab={\bf}% can't use \headitemfont since the parsing differs
+  \the\everytab % for the first item
+}%
+%
+% default for tables with no headings.
+\let\headitemcrhook=\relax
+%
+\def\tab{\checkenv\multitable &\the\everytab}%
+
+\newtoks\everytab  % insert after every tab.
+%
+\envdef\multitable{%
+  \vskip\parskip
+  \startsavinginserts
+  %
+  % @item within a multitable starts a normal row.
+  % We use \def instead of \let so that if one of the multitable entries
+  % contains an @itemize, we don't choke on the \item (seen as \crcr aka
+  % \endtemplate) expanding \doitemize.
+  \def\item{\crcr}%
+  %
+  \tolerance=9500
+  \hbadness=9500
+  \parskip=0pt
+  \parindent=6pt
+  \overfullrule=0pt
+  \global\colcount=0
+  %
+  \everycr = {%
+    \noalign{%
+      \global\everytab={}% Reset from possible headitem.
+      \global\colcount=0 % Reset the column counter.
+      %
+      % Check for saved footnotes, etc.:
+      \checkinserts
+      %
+      % Perhaps a \nobreak, then reset:
+      \headitemcrhook
+      \global\let\headitemcrhook=\relax
+    }%
+  }%
+  %
+  \parsearg\domultitable
+}
+\def\domultitable#1{%
+  % To parse everything between @multitable and @item:
+  \setuptable#1 \endsetuptable
+  %
+  % This preamble sets up a generic column definition, which will
+  % be used as many times as user calls for columns.
+  % \vtop will set a single line and will also let text wrap and
+  % continue for many paragraphs if desired.
+  \halign\bgroup &%
+    \global\advance\colcount by 1
+    \strut
+    \vtop{%
+      \advance\hsize by -1\leftskip
+      % Find the correct column width
+      \hsize=\expandafter\csname col\the\colcount\endcsname
+      %
+      \rightskip=0pt
+      \ifnum\colcount=1
+        \advance\hsize by\leftskip % Add indent of surrounding text
+      \else
+        % In order to keep entries from bumping into each other.
+        \leftskip=12pt
+        \ifsetpercent \else
+          % If a template has been used
+          \advance\hsize by \leftskip
+        \fi
+      \fi
+      \noindent\ignorespaces##\unskip\strut
+    }\cr
+}
+\def\Emultitable{%
+  \crcr
+  \egroup % end the \halign
+  \global\setpercentfalse
+}
+
+
+\message{conditionals,}
+
+% @iftex, @ifnotdocbook, @ifnothtml, @ifnotinfo, @ifnotplaintext,
+% @ifnotxml always succeed.  They currently do nothing; we don't
+% attempt to check whether the conditionals are properly nested.  But we
+% have to remember that they are conditionals, so that @end doesn't
+% attempt to close an environment group.
+%
+\def\makecond#1{%
+  \expandafter\let\csname #1\endcsname = \relax
+  \expandafter\let\csname iscond.#1\endcsname = 1
+}
+\makecond{iftex}
+\makecond{ifnotdocbook}
+\makecond{ifnothtml}
+\makecond{ifnotinfo}
+\makecond{ifnotplaintext}
+\makecond{ifnotxml}
+
+% Ignore @ignore, @ifhtml, @ifinfo, and the like.
+%
+\def\direntry{\doignore{direntry}}
+\def\documentdescription{\doignore{documentdescription}}
+\def\docbook{\doignore{docbook}}
+\def\html{\doignore{html}}
+\def\ifdocbook{\doignore{ifdocbook}}
+\def\ifhtml{\doignore{ifhtml}}
+\def\ifinfo{\doignore{ifinfo}}
+\def\ifnottex{\doignore{ifnottex}}
+\def\ifplaintext{\doignore{ifplaintext}}
+\def\ifxml{\doignore{ifxml}}
+\def\ignore{\doignore{ignore}}
+\def\menu{\doignore{menu}}
+\def\xml{\doignore{xml}}
+
+% Ignore text until a line `@end #1', keeping track of nested conditionals.
+%
+% A count to remember the depth of nesting.
+\newcount\doignorecount
+
+\def\doignore#1{\begingroup
+  % Scan in ``verbatim'' mode:
+  \obeylines
+  \catcode`\@ = \other
+  \catcode`\{ = \other
+  \catcode`\} = \other
+  %
+  % Make sure that spaces turn into tokens that match what \doignoretext wants.
+  \spaceisspace
+  %
+  % Count number of #1's that we've seen.
+  \doignorecount = 0
+  %
+  % Swallow text until we reach the matching `@end #1'.
+  \dodoignore{#1}%
+}
+
+{ \catcode`_=11 % We want to use \_STOP_ which cannot appear in texinfo source.
+  \obeylines %
+  %
+  \gdef\dodoignore#1{%
+    % #1 contains the command name as a string, e.g., `ifinfo'.
+    %
+    % Define a command to find the next `@end #1'.
+    \long\def\doignoretext##1^^M@end #1{%
+      \doignoretextyyy##1^^M@#1\_STOP_}%
+    %
+    % And this command to find another #1 command, at the beginning of a
+    % line.  (Otherwise, we would consider a line `@c @ifset', for
+    % example, to count as an @ifset for nesting.)
+    \long\def\doignoretextyyy##1^^M@#1##2\_STOP_{\doignoreyyy{##2}\_STOP_}%
+    %
+    % And now expand that command.
+    \doignoretext ^^M%
+  }%
+}
+
+\def\doignoreyyy#1{%
+  \def\temp{#1}%
+  \ifx\temp\empty			% Nothing found.
+    \let\next\doignoretextzzz
+  \else					% Found a nested condition, ...
+    \advance\doignorecount by 1
+    \let\next\doignoretextyyy		% ..., look for another.
+    % If we're here, #1 ends with ^^M\ifinfo (for example).
+  \fi
+  \next #1% the token \_STOP_ is present just after this macro.
+}
+
+% We have to swallow the remaining "\_STOP_".
+%
+\def\doignoretextzzz#1{%
+  \ifnum\doignorecount = 0	% We have just found the outermost @end.
+    \let\next\enddoignore
+  \else				% Still inside a nested condition.
+    \advance\doignorecount by -1
+    \let\next\doignoretext      % Look for the next @end.
+  \fi
+  \next
+}
+
+% Finish off ignored text.
+{ \obeylines%
+  % Ignore anything after the last `@end #1'; this matters in verbatim
+  % environments, where otherwise the newline after an ignored conditional
+  % would result in a blank line in the output.
+  \gdef\enddoignore#1^^M{\endgroup\ignorespaces}%
+}
+
+
+% @set VAR sets the variable VAR to an empty value.
+% @set VAR REST-OF-LINE sets VAR to the value REST-OF-LINE.
+%
+% Since we want to separate VAR from REST-OF-LINE (which might be
+% empty), we can't just use \parsearg; we have to insert a space of our
+% own to delimit the rest of the line, and then take it out again if we
+% didn't need it.
+% We rely on the fact that \parsearg sets \catcode`\ =10.
+%
+\parseargdef\set{\setyyy#1 \endsetyyy}
+\def\setyyy#1 #2\endsetyyy{%
+  {%
+    \makevalueexpandable
+    \def\temp{#2}%
+    \edef\next{\gdef\makecsname{SET#1}}%
+    \ifx\temp\empty
+      \next{}%
+    \else
+      \setzzz#2\endsetzzz
+    \fi
+  }%
+}
+% Remove the trailing space \setxxx inserted.
+\def\setzzz#1 \endsetzzz{\next{#1}}
+
+% @clear VAR clears (i.e., unsets) the variable VAR.
+%
+\parseargdef\clear{%
+  {%
+    \makevalueexpandable
+    \global\expandafter\let\csname SET#1\endcsname=\relax
+  }%
+}
+
+% @value{foo} gets the text saved in variable foo.
+\def\value{\begingroup\makevalueexpandable\valuexxx}
+\def\valuexxx#1{\expandablevalue{#1}\endgroup}
+{
+  \catcode`\-=\active \catcode`\_=\active
+  %
+  \gdef\makevalueexpandable{%
+    \let\value = \expandablevalue
+    % We don't want these characters active, ...
+    \catcode`\-=\other \catcode`\_=\other
+    % ..., but we might end up with active ones in the argument if
+    % we're called from @code, as @code{@value{foo-bar_}}, though.
+    % So \let them to their normal equivalents.
+    \let-\normaldash \let_\normalunderscore
+  }
+}
+
+\def\expandablevalue#1{%
+  \expandafter\ifx\csname SET#1\endcsname\relax
+    {[No value for ``#1'']}%
+    \message{Variable `#1', used in @value, is not set.}%
+  \else
+    \csname SET#1\endcsname
+  \fi
+}
+
+% Like \expandablevalue, but completely expandable (the \message in the
+% definition above operates at the execution level of TeX).  Used when
+% writing to auxiliary files, due to the expansion that \write does.
+% If flag is undefined, pass through an unexpanded @value command: maybe it
+% will be set by the time it is read back in.
+%
+% NB flag names containing - or _ may not work here.
+\def\dummyvalue#1{%
+  \expandafter\ifx\csname SET#1\endcsname\relax
+    \string\value{#1}%
+  \else
+    \csname SET#1\endcsname
+  \fi
+}
+
+% Used for @value's in index entries to form the sort key: expand the @value
+% if possible, otherwise sort late.
+\def\indexnofontsvalue#1{%
+  \expandafter\ifx\csname SET#1\endcsname\relax
+    ZZZZZZZ%
+  \else
+    \csname SET#1\endcsname
+  \fi
+}
+
+% @ifset VAR ... @end ifset reads the `...' iff VAR has been defined
+% with @set.
+%
+% To get the special treatment we need for `@end ifset,' we call
+% \makecond and then redefine.
+%
+\makecond{ifset}
+\def\ifset{\parsearg{\doifset{\let\next=\ifsetfail}}}
+\def\doifset#1#2{%
+  {%
+    \makevalueexpandable
+    \let\next=\empty
+    \expandafter\ifx\csname SET#2\endcsname\relax
+      #1% If not set, redefine \next.
+    \fi
+    \expandafter
+  }\next
+}
+\def\ifsetfail{\doignore{ifset}}
+
+% @ifclear VAR ... @end executes the `...' iff VAR has never been
+% defined with @set, or has been undefined with @clear.
+%
+% The `\else' inside the `\doifset' parameter is a trick to reuse the
+% above code: if the variable is not set, do nothing, if it is set,
+% then redefine \next to \ifclearfail.
+%
+\makecond{ifclear}
+\def\ifclear{\parsearg{\doifset{\else \let\next=\ifclearfail}}}
+\def\ifclearfail{\doignore{ifclear}}
+
+% @ifcommandisdefined CMD ... @end executes the `...' if CMD (written
+% without the @) is in fact defined.  We can only feasibly check at the
+% TeX level, so something like `mathcode' is going to considered
+% defined even though it is not a Texinfo command.
+%
+\makecond{ifcommanddefined}
+\def\ifcommanddefined{\parsearg{\doifcmddefined{\let\next=\ifcmddefinedfail}}}
+%
+\def\doifcmddefined#1#2{{%
+    \makevalueexpandable
+    \let\next=\empty
+    \expandafter\ifx\csname #2\endcsname\relax
+      #1% If not defined, \let\next as above.
+    \fi
+    \expandafter
+  }\next
+}
+\def\ifcmddefinedfail{\doignore{ifcommanddefined}}
+
+% @ifcommandnotdefined CMD ... handled similar to @ifclear above.
+\makecond{ifcommandnotdefined}
+\def\ifcommandnotdefined{%
+  \parsearg{\doifcmddefined{\else \let\next=\ifcmdnotdefinedfail}}}
+\def\ifcmdnotdefinedfail{\doignore{ifcommandnotdefined}}
+
+% Set the `txicommandconditionals' variable, so documents have a way to
+% test if the @ifcommand...defined conditionals are available.
+\set txicommandconditionals
+
+% @dircategory CATEGORY  -- specify a category of the dir file
+% which this file should belong to.  Ignore this in TeX.
+\let\dircategory=\comment
+
+% @defininfoenclose.
+\let\definfoenclose=\comment
+
+
+\message{indexing,}
+% Index generation facilities
+
+% Define \newwrite to be identical to plain tex's \newwrite
+% except not \outer, so it can be used within macros and \if's.
+\edef\newwrite{\makecsname{ptexnewwrite}}
+
+% \newindex {foo} defines an index named IX.
+% It automatically defines \IXindex such that
+% \IXindex ...rest of line... puts an entry in the index IX.
+% It also defines \IXindfile to be the number of the output channel for
+% the file that accumulates this index.  The file's extension is IX.
+% The name of an index should be no more than 2 characters long
+% for the sake of vms.
+%
+\def\newindex#1{%
+  \expandafter\chardef\csname#1indfile\endcsname=0
+  \expandafter\xdef\csname#1index\endcsname{%     % Define @#1index
+    \noexpand\doindex{#1}}
+}
+
+% @defindex foo  ==  \newindex{foo}
+%
+\def\defindex{\parsearg\newindex}
+
+% Define @defcodeindex, like @defindex except put all entries in @code.
+%
+\def\defcodeindex{\parsearg\newcodeindex}
+%
+\def\newcodeindex#1{%
+  \expandafter\chardef\csname#1indfile\endcsname=0
+  \expandafter\xdef\csname#1index\endcsname{%
+    \noexpand\docodeindex{#1}}%
+}
+
+% The default indices:
+\newindex{cp}%      concepts,
+\newcodeindex{fn}%  functions,
+\newcodeindex{vr}%  variables,
+\newcodeindex{tp}%  types,
+\newcodeindex{ky}%  keys
+\newcodeindex{pg}%  and programs.
+
+
+% @synindex foo bar    makes index foo feed into index bar.
+% Do this instead of @defindex foo if you don't want it as a separate index.
+%
+% @syncodeindex foo bar   similar, but put all entries made for index foo
+% inside @code.
+%
+\def\synindex#1 #2 {\dosynindex\doindex{#1}{#2}}
+\def\syncodeindex#1 #2 {\dosynindex\docodeindex{#1}{#2}}
+
+% #1 is \doindex or \docodeindex, #2 the index getting redefined (foo),
+% #3 the target index (bar).
+\def\dosynindex#1#2#3{%
+  \requireopenindexfile{#3}%
+  % redefine \fooindfile:
+  \expandafter\let\expandafter\temp\expandafter=\csname#3indfile\endcsname
+  \expandafter\let\csname#2indfile\endcsname=\temp
+  % redefine \fooindex:
+  \expandafter\xdef\csname#2index\endcsname{\noexpand#1{#3}}%
+}
+
+% Define \doindex, the driver for all index macros.
+% Argument #1 is generated by the calling \fooindex macro,
+% and it is the two-letter name of the index.
+
+\def\doindex#1{\edef\indexname{#1}\parsearg\doindexxxx}
+\def\doindexxxx #1{\doind{\indexname}{#1}}
+
+% like the previous two, but they put @code around the argument.
+\def\docodeindex#1{\edef\indexname{#1}\parsearg\docodeindexxxx}
+\def\docodeindexxxx #1{\docind{\indexname}{#1}}
+
+
+% Used for the aux, toc and index files to prevent expansion of Texinfo
+% commands.
+%
+\def\atdummies{%
+  \definedummyletter\@%
+  \definedummyletter\ %
+  \definedummyletter\{%
+  \definedummyletter\}%
+  \definedummyletter\&%
+  %
+  % Do the redefinitions.
+  \definedummies
+  \otherbackslash
+}
+
+% \definedummyword defines \#1 as \string\#1\space, thus effectively
+% preventing its expansion.  This is used only for control words,
+% not control letters, because the \space would be incorrect for
+% control characters, but is needed to separate the control word
+% from whatever follows.
+%
+% These can be used both for control words that take an argument and
+% those that do not.  If it is followed by {arg} in the input, then
+% that will dutifully get written to the index (or wherever).
+%
+% For control letters, we have \definedummyletter, which omits the
+% space.
+%
+\def\definedummyword  #1{\def#1{\string#1\space}}%
+\def\definedummyletter#1{\def#1{\string#1}}%
+\let\definedummyaccent\definedummyletter
+
+% Called from \atdummies to prevent the expansion of commands.
+%
+\def\definedummies{%
+  %
+  \let\commondummyword\definedummyword
+  \let\commondummyletter\definedummyletter
+  \let\commondummyaccent\definedummyaccent
+  \commondummiesnofonts
+  %
+  \definedummyletter\_%
+  \definedummyletter\-%
+  %
+  % Non-English letters.
+  \definedummyword\AA
+  \definedummyword\AE
+  \definedummyword\DH
+  \definedummyword\L
+  \definedummyword\O
+  \definedummyword\OE
+  \definedummyword\TH
+  \definedummyword\aa
+  \definedummyword\ae
+  \definedummyword\dh
+  \definedummyword\exclamdown
+  \definedummyword\l
+  \definedummyword\o
+  \definedummyword\oe
+  \definedummyword\ordf
+  \definedummyword\ordm
+  \definedummyword\questiondown
+  \definedummyword\ss
+  \definedummyword\th
+  %
+  % Although these internal commands shouldn't show up, sometimes they do.
+  \definedummyword\bf
+  \definedummyword\gtr
+  \definedummyword\hat
+  \definedummyword\less
+  \definedummyword\sf
+  \definedummyword\sl
+  \definedummyword\tclose
+  \definedummyword\tt
+  %
+  \definedummyword\LaTeX
+  \definedummyword\TeX
+  %
+  % Assorted special characters.
+  \definedummyword\ampchar
+  \definedummyword\atchar
+  \definedummyword\arrow
+  \definedummyword\backslashchar
+  \definedummyword\bullet
+  \definedummyword\comma
+  \definedummyword\copyright
+  \definedummyword\registeredsymbol
+  \definedummyword\dots
+  \definedummyword\enddots
+  \definedummyword\entrybreak
+  \definedummyword\equiv
+  \definedummyword\error
+  \definedummyword\euro
+  \definedummyword\expansion
+  \definedummyword\geq
+  \definedummyword\guillemetleft
+  \definedummyword\guillemetright
+  \definedummyword\guilsinglleft
+  \definedummyword\guilsinglright
+  \definedummyword\lbracechar
+  \definedummyword\leq
+  \definedummyword\mathopsup
+  \definedummyword\minus
+  \definedummyword\ogonek
+  \definedummyword\pounds
+  \definedummyword\point
+  \definedummyword\print
+  \definedummyword\quotedblbase
+  \definedummyword\quotedblleft
+  \definedummyword\quotedblright
+  \definedummyword\quoteleft
+  \definedummyword\quoteright
+  \definedummyword\quotesinglbase
+  \definedummyword\rbracechar
+  \definedummyword\result
+  \definedummyword\sub
+  \definedummyword\sup
+  \definedummyword\textdegree
+  %
+  \definedummyword\subentry
+  %
+  % We want to disable all macros so that they are not expanded by \write.
+  \macrolist
+  \let\value\dummyvalue
+  %
+  \normalturnoffactive
+}
+
+% \commondummiesnofonts: common to \definedummies and \indexnofonts.
+% Define \commondummyletter, \commondummyaccent and \commondummyword before
+% using.  Used for accents, font commands, and various control letters.
+%
+\def\commondummiesnofonts{%
+  % Control letters and accents.
+  \commondummyletter\!%
+  \commondummyaccent\"%
+  \commondummyaccent\'%
+  \commondummyletter\*%
+  \commondummyaccent\,%
+  \commondummyletter\.%
+  \commondummyletter\/%
+  \commondummyletter\:%
+  \commondummyaccent\=%
+  \commondummyletter\?%
+  \commondummyaccent\^%
+  \commondummyaccent\`%
+  \commondummyaccent\~%
+  \commondummyword\u
+  \commondummyword\v
+  \commondummyword\H
+  \commondummyword\dotaccent
+  \commondummyword\ogonek
+  \commondummyword\ringaccent
+  \commondummyword\tieaccent
+  \commondummyword\ubaraccent
+  \commondummyword\udotaccent
+  \commondummyword\dotless
+  %
+  % Texinfo font commands.
+  \commondummyword\b
+  \commondummyword\i
+  \commondummyword\r
+  \commondummyword\sansserif
+  \commondummyword\sc
+  \commondummyword\slanted
+  \commondummyword\t
+  %
+  % Commands that take arguments.
+  \commondummyword\abbr
+  \commondummyword\acronym
+  \commondummyword\anchor
+  \commondummyword\cite
+  \commondummyword\code
+  \commondummyword\command
+  \commondummyword\dfn
+  \commondummyword\dmn
+  \commondummyword\email
+  \commondummyword\emph
+  \commondummyword\env
+  \commondummyword\file
+  \commondummyword\image
+  \commondummyword\indicateurl
+  \commondummyword\inforef
+  \commondummyword\kbd
+  \commondummyword\key
+  \commondummyword\math
+  \commondummyword\option
+  \commondummyword\pxref
+  \commondummyword\ref
+  \commondummyword\samp
+  \commondummyword\strong
+  \commondummyword\tie
+  \commondummyword\U
+  \commondummyword\uref
+  \commondummyword\url
+  \commondummyword\var
+  \commondummyword\verb
+  \commondummyword\w
+  \commondummyword\xref
+}
+
+\let\indexlbrace\relax
+\let\indexrbrace\relax
+\let\indexatchar\relax
+\let\indexbackslash\relax
+
+{\catcode`\@=0
+\catcode`\\=13
+  @gdef@backslashdisappear{@def\{}}
+}
+
+{
+\catcode`\<=13
+\catcode`\-=13
+\catcode`\`=13
+  \gdef\indexnonalnumdisappear{%
+    \expandafter\ifx\csname SETtxiindexlquoteignore\endcsname\relax\else
+      % @set txiindexlquoteignore makes us ignore left quotes in the sort term.
+      % (Introduced for FSFS 2nd ed.)
+      \let`=\empty
+    \fi
+    %
+    \expandafter\ifx\csname SETtxiindexbackslashignore\endcsname\relax\else
+      \backslashdisappear
+    \fi
+    %
+    \expandafter\ifx\csname SETtxiindexhyphenignore\endcsname\relax\else
+      \def-{}%
+    \fi
+    \expandafter\ifx\csname SETtxiindexlessthanignore\endcsname\relax\else
+      \def<{}%
+    \fi
+    \expandafter\ifx\csname SETtxiindexatsignignore\endcsname\relax\else
+      \def\@{}%
+    \fi
+  }
+
+  \gdef\indexnonalnumreappear{%
+    \let-\normaldash
+    \let<\normalless
+  }
+}
+
+
+% \indexnofonts is used when outputting the strings to sort the index
+% by, and when constructing control sequence names.  It eliminates all
+% control sequences and just writes whatever the best ASCII sort string
+% would be for a given command (usually its argument).
+%
+\def\indexnofonts{%
+  % Accent commands should become @asis.
+  \def\commondummyaccent##1{\let##1\asis}%
+  % We can just ignore other control letters.
+  \def\commondummyletter##1{\let##1\empty}%
+  % All control words become @asis by default; overrides below.
+  \let\commondummyword\commondummyaccent
+  \commondummiesnofonts
+  %
+  % Don't no-op \tt, since it isn't a user-level command
+  % and is used in the definitions of the active chars like <, >, |, etc.
+  % Likewise with the other plain tex font commands.
+  %\let\tt=\asis
+  %
+  \def\ { }%
+  \def\@{@}%
+  \def\_{\normalunderscore}%
+  \def\-{}% @- shouldn't affect sorting
+  %
+  \uccode`\1=`\{ \uppercase{\def\{{1}}%
+  \uccode`\1=`\} \uppercase{\def\}{1}}%
+  \let\lbracechar\{%
+  \let\rbracechar\}%
+  %
+  % Non-English letters.
+  \def\AA{AA}%
+  \def\AE{AE}%
+  \def\DH{DZZ}%
+  \def\L{L}%
+  \def\OE{OE}%
+  \def\O{O}%
+  \def\TH{TH}%
+  \def\aa{aa}%
+  \def\ae{ae}%
+  \def\dh{dzz}%
+  \def\exclamdown{!}%
+  \def\l{l}%
+  \def\oe{oe}%
+  \def\ordf{a}%
+  \def\ordm{o}%
+  \def\o{o}%
+  \def\questiondown{?}%
+  \def\ss{ss}%
+  \def\th{th}%
+  %
+  \let\do\indexnofontsdef
+  %
+  \do\LaTeX{LaTeX}%
+  \do\TeX{TeX}%
+  %
+  % Assorted special characters.
+  \do\atchar{@}%
+  \do\arrow{->}%
+  \do\bullet{bullet}%
+  \do\comma{,}%
+  \do\copyright{copyright}%
+  \do\dots{...}%
+  \do\enddots{...}%
+  \do\equiv{==}%
+  \do\error{error}%
+  \do\euro{euro}%
+  \do\expansion{==>}%
+  \do\geq{>=}%
+  \do\guillemetleft{<<}%
+  \do\guillemetright{>>}%
+  \do\guilsinglleft{<}%
+  \do\guilsinglright{>}%
+  \do\leq{<=}%
+  \do\lbracechar{\{}%
+  \do\minus{-}%
+  \do\point{.}%
+  \do\pounds{pounds}%
+  \do\print{-|}%
+  \do\quotedblbase{"}%
+  \do\quotedblleft{"}%
+  \do\quotedblright{"}%
+  \do\quoteleft{`}%
+  \do\quoteright{'}%
+  \do\quotesinglbase{,}%
+  \do\rbracechar{\}}%
+  \do\registeredsymbol{R}%
+  \do\result{=>}%
+  \do\textdegree{o}%
+  %
+  % We need to get rid of all macros, leaving only the arguments (if present).
+  % Of course this is not nearly correct, but it is the best we can do for now.
+  % makeinfo does not expand macros in the argument to @deffn, which ends up
+  % writing an index entry, and texindex isn't prepared for an index sort entry
+  % that starts with \.
+  %
+  % Since macro invocations are followed by braces, we can just redefine them
+  % to take a single TeX argument.  The case of a macro invocation that
+  % goes to end-of-line is not handled.
+  %
+  \macrolist
+  \let\value\indexnofontsvalue
+}
+
+% Give the control sequence a definition that removes the {} that follows
+% its use, e.g. @AA{} -> AA
+\def\indexnofontsdef#1#2{\def#1##1{#2}}%
+
+
+
+
+% #1 is the index name, #2 is the entry text.
+\def\doind#1#2{%
+  \iflinks
+  {%
+    %
+    \requireopenindexfile{#1}%
+    \edef\writeto{\csname#1indfile\endcsname}%
+    %
+    \def\indextext{#2}%
+    \safewhatsit\doindwrite
+  }%
+  \fi
+}
+
+% Same as \doind, but for code indices
+\def\docind#1#2{%
+  \iflinks
+  {%
+    %
+    \requireopenindexfile{#1}%
+    \edef\writeto{\csname#1indfile\endcsname}%
+    %
+    \def\indextext{#2}%
+    \safewhatsit\docindwrite
+  }%
+  \fi
+}
+
+% Check if an index file has been opened, and if not, open it.
+\def\requireopenindexfile#1{%
+\ifnum\csname #1indfile\endcsname=0
+  \expandafter\newwrite \csname#1indfile\endcsname
+  \edef\suffix{#1}%
+  % A .fls suffix would conflict with the file extension for the output
+  % of -recorder, so use .f1s instead.
+  \ifx\suffix\indexisfl\def\suffix{f1}\fi
+  % Open the file
+  \immediate\openout\csname#1indfile\endcsname \jobname.\suffix
+  % Using \immediate above here prevents an object entering into the current
+  % box, which could confound checks such as those in \safewhatsit for
+  % preceding skips.
+  \typeout{Writing index file \jobname.\suffix}%
+\fi}
+\def\indexisfl{fl}
+
+% Definition for writing index entry sort key.
+{
+\catcode`\-=13
+\gdef\indexwritesortas{%
+  \begingroup
+  \indexnonalnumreappear
+  \indexwritesortasxxx}
+\gdef\indexwritesortasxxx#1{%
+  \xdef\indexsortkey{#1}\endgroup}
+}
+
+\def\indexwriteseealso#1{
+  \gdef\pagenumbertext{\string\seealso{#1}}%
+}
+\def\indexwriteseeentry#1{
+  \gdef\pagenumbertext{\string\seeentry{#1}}%
+}
+
+% The default definitions
+\def\sortas#1{}%
+\def\seealso#1{\i{\putwordSeeAlso}\ #1}% for sorted index file only
+\def\putwordSeeAlso{See also}
+\def\seeentry#1{\i{\putwordSee}\ #1}% for sorted index file only
+
+
+% Given index entry text like "aaa @subentry bbb @sortas{ZZZ}":
+%   * Set \bracedtext to "{aaa}{bbb}"
+%   * Set \fullindexsortkey to "aaa @subentry ZZZ"
+%   * If @seealso occurs, set \pagenumbertext
+%
+\def\splitindexentry#1{%
+  \gdef\fullindexsortkey{}%
+  \xdef\bracedtext{}%
+  \def\sep{}%
+  \def\seealso##1{}%
+  \def\seeentry##1{}%
+  \expandafter\doindexsegment#1\subentry\finish\subentry
+}
+
+% append the results from the next segment
+\def\doindexsegment#1\subentry{%
+  \def\segment{#1}%
+  \ifx\segment\isfinish
+  \else
+    %
+    % Fully expand the segment, throwing away any @sortas directives, and
+    % trim spaces.
+    \edef\trimmed{\segment}%
+    \edef\trimmed{\expandafter\eatspaces\expandafter{\trimmed}}%
+    \ifincodeindex
+      \edef\trimmed{\noexpand\code{\trimmed}}%
+    \fi
+    %
+    \xdef\bracedtext{\bracedtext{\trimmed}}%
+    %
+    % Get the string to sort by.  Process the segment with all
+    % font commands turned off.
+    \bgroup
+      \let\sortas\indexwritesortas
+      \let\seealso\indexwriteseealso
+      \let\seeentry\indexwriteseeentry
+      \indexnofonts
+      % The braces around the commands are recognized by texindex.
+      \def\lbracechar{{\string\indexlbrace}}%
+      \def\rbracechar{{\string\indexrbrace}}%
+      \let\{=\lbracechar
+      \let\}=\rbracechar
+      \def\@{{\string\indexatchar}}%
+      \def\atchar##1{\@}%
+      \def\backslashchar{{\string\indexbackslash}}%
+      \uccode`\~=`\\ \uppercase{\let~\backslashchar}%
+      %
+      \let\indexsortkey\empty
+      \global\let\pagenumbertext\empty
+      % Execute the segment and throw away the typeset output.  This executes
+      % any @sortas or @seealso commands in this segment.
+      \setbox\dummybox = \hbox{\segment}%
+      \ifx\indexsortkey\empty{%
+        \indexnonalnumdisappear
+        \xdef\trimmed{\segment}%
+        \xdef\trimmed{\expandafter\eatspaces\expandafter{\trimmed}}%
+        \xdef\indexsortkey{\trimmed}%
+        \ifx\indexsortkey\empty\xdef\indexsortkey{ }\fi
+      }\fi
+      %
+      % Append to \fullindexsortkey.
+      \edef\tmp{\gdef\noexpand\fullindexsortkey{%
+                  \fullindexsortkey\sep\indexsortkey}}%
+      \tmp
+    \egroup
+    \def\sep{\subentry}%
+    %
+    \expandafter\doindexsegment
+  \fi
+}
+\def\isfinish{\finish}%
+\newbox\dummybox % used above
+
+\let\subentry\relax
+
+% Use \ instead of @ in index files.  To support old texi2dvi and texindex.
+% This works without changing the escape character used in the toc or aux
+% files because the index entries are fully expanded here, and \string uses
+% the current value of \escapechar.
+\def\escapeisbackslash{\escapechar=`\\}
+
+% Use \ in index files by default.  texi2dvi didn't support @ as the escape
+% character (as it checked for "\entry" in the files, and not "@entry").  When
+% the new version of texi2dvi has had a chance to become more prevalent, then
+% the escape character can change back to @ again.  This should be an easy
+% change to make now because both @ and \ are only used as escape characters in
+% index files, never standing for themselves.
+%
+\set txiindexescapeisbackslash
+
+% Write the entry in \indextext to the index file.
+%
+
+\newif\ifincodeindex
+\def\doindwrite{\incodeindexfalse\doindwritex}
+\def\docindwrite{\incodeindextrue\doindwritex}
+
+\def\doindwritex{%
+  \maybemarginindex
+  %
+  \atdummies
+  %
+  \expandafter\ifx\csname SETtxiindexescapeisbackslash\endcsname\relax\else
+    \escapeisbackslash
+  \fi
+  %
+  % For texindex which always views { and } as separators.
+  \def\{{\lbracechar{}}%
+  \def\}{\rbracechar{}}%
+  \uccode`\~=`\\ \uppercase{\def~{\backslashchar{}}}%
+  %
+  % Split the entry into primary entry and any subentries, and get the index
+  % sort key.
+  \splitindexentry\indextext
+  %
+  % Set up the complete index entry, with both the sort key and
+  % the original text, including any font commands.  We write
+  % three arguments to \entry to the .?? file (four in the
+  % subentry case), texindex reduces to two when writing the .??s
+  % sorted result.
+  %
+  \edef\temp{%
+    \write\writeto{%
+      \string\entry{\fullindexsortkey}%
+        {\ifx\pagenumbertext\empty\noexpand\folio\else\pagenumbertext\fi}%
+        \bracedtext}%
+  }%
+  \temp
+}
+
+% Put the index entry in the margin if desired (undocumented).
+\def\maybemarginindex{%
+  \ifx\SETmarginindex\relax\else
+    \insert\margin{\hbox{\vrule height8pt depth3pt width0pt \relax\indextext}}%
+  \fi
+}
+\let\SETmarginindex=\relax
+
+
+% Take care of unwanted page breaks/skips around a whatsit:
+%
+% If a skip is the last thing on the list now, preserve it
+% by backing up by \lastskip, doing the \write, then inserting
+% the skip again.  Otherwise, the whatsit generated by the
+% \write or \pdfdest will make \lastskip zero.  The result is that
+% sequences like this:
+% @end defun
+% @tindex whatever
+% @defun ...
+% will have extra space inserted, because the \medbreak in the
+% start of the @defun won't see the skip inserted by the @end of
+% the previous defun.
+%
+% But don't do any of this if we're not in vertical mode.  We
+% don't want to do a \vskip and prematurely end a paragraph.
+%
+% Avoid page breaks due to these extra skips, too.
+%
+% But wait, there is a catch there:
+% We'll have to check whether \lastskip is zero skip.  \ifdim is not
+% sufficient for this purpose, as it ignores stretch and shrink parts
+% of the skip.  The only way seems to be to check the textual
+% representation of the skip.
+%
+% The following is almost like \def\zeroskipmacro{0.0pt} except that
+% the ``p'' and ``t'' characters have catcode \other, not 11 (letter).
+%
+\edef\zeroskipmacro{\expandafter\the\csname z@skip\endcsname}
+%
+\newskip\whatsitskip
+\newcount\whatsitpenalty
+%
+% ..., ready, GO:
+%
+\def\safewhatsit#1{\ifhmode
+  #1%
+ \else
+  % \lastskip and \lastpenalty cannot both be nonzero simultaneously.
+  \whatsitskip = \lastskip
+  \edef\lastskipmacro{\the\lastskip}%
+  \whatsitpenalty = \lastpenalty
+  %
+  % If \lastskip is nonzero, that means the last item was a
+  % skip.  And since a skip is discardable, that means this
+  % -\whatsitskip glue we're inserting is preceded by a
+  % non-discardable item, therefore it is not a potential
+  % breakpoint, therefore no \nobreak needed.
+  \ifx\lastskipmacro\zeroskipmacro
+  \else
+    \vskip-\whatsitskip
+  \fi
+  %
+  #1%
+  %
+  \ifx\lastskipmacro\zeroskipmacro
+    % If \lastskip was zero, perhaps the last item was a penalty, and
+    % perhaps it was >=10000, e.g., a \nobreak.  In that case, we want
+    % to re-insert the same penalty (values >10000 are used for various
+    % signals); since we just inserted a non-discardable item, any
+    % following glue (such as a \parskip) would be a breakpoint.  For example:
+    %   @deffn deffn-whatever
+    %   @vindex index-whatever
+    %   Description.
+    % would allow a break between the index-whatever whatsit
+    % and the "Description." paragraph.
+    \ifnum\whatsitpenalty>9999 \penalty\whatsitpenalty \fi
+  \else
+    % On the other hand, if we had a nonzero \lastskip,
+    % this make-up glue would be preceded by a non-discardable item
+    % (the whatsit from the \write), so we must insert a \nobreak.
+    \nobreak\vskip\whatsitskip
+  \fi
+\fi}
+
+% The index entry written in the file actually looks like
+%  \entry {sortstring}{page}{topic}
+% or
+%  \entry {sortstring}{page}{topic}{subtopic}
+% The texindex program reads in these files and writes files
+% containing these kinds of lines:
+%  \initial {c}
+%     before the first topic whose initial is c
+%  \entry {topic}{pagelist}
+%     for a topic that is used without subtopics
+%  \primary {topic}
+%  \entry {topic}{}
+%     for the beginning of a topic that is used with subtopics
+%  \secondary {subtopic}{pagelist}
+%     for each subtopic.
+%  \secondary {subtopic}{}
+%     for a subtopic with sub-subtopics
+%  \tertiary {subtopic}{subsubtopic}{pagelist}
+%     for each sub-subtopic.
+
+% Define the user-accessible indexing commands
+% @findex, @vindex, @kindex, @cindex.
+
+\def\findex {\fnindex}
+\def\kindex {\kyindex}
+\def\cindex {\cpindex}
+\def\vindex {\vrindex}
+\def\tindex {\tpindex}
+\def\pindex {\pgindex}
+
+% Define the macros used in formatting output of the sorted index material.
+
+% @printindex causes a particular index (the ??s file) to get printed.
+% It does not print any chapter heading (usually an @unnumbered).
+%
+\parseargdef\printindex{\begingroup
+  \dobreak \chapheadingskip{10000}%
+  %
+  \smallfonts \rm
+  \tolerance = 9500
+  \plainfrenchspacing
+  \everypar = {}% don't want the \kern\-parindent from indentation suppression.
+  %
+  % See comment in \requireopenindexfile.
+  \def\indexname{#1}\ifx\indexname\indexisfl\def\indexname{f1}\fi
+  %
+  % See if the index file exists and is nonempty.
+  \openin 1 \jobname.\indexname s
+  \ifeof 1
+    % \enddoublecolumns gets confused if there is no text in the index,
+    % and it loses the chapter title and the aux file entries for the
+    % index.  The easiest way to prevent this problem is to make sure
+    % there is some text.
+    \putwordIndexNonexistent
+    \typeout{No file \jobname.\indexname s.}%
+  \else
+    % If the index file exists but is empty, then \openin leaves \ifeof
+    % false.  We have to make TeX try to read something from the file, so
+    % it can discover if there is anything in it.
+    \read 1 to \thisline
+    \ifeof 1
+      \putwordIndexIsEmpty
+    \else
+      \expandafter\printindexzz\thisline\relax\relax\finish%
+    \fi
+  \fi
+  \closein 1
+\endgroup}
+
+% If the index file starts with a backslash, forgo reading the index
+% file altogether.  If somebody upgrades texinfo.tex they may still have
+% old index files using \ as the escape character.  Reading this would
+% at best lead to typesetting garbage, at worst a TeX syntax error.
+\def\printindexzz#1#2\finish{%
+  \expandafter\ifx\csname SETtxiindexescapeisbackslash\endcsname\relax
+    \uccode`\~=`\\ \uppercase{\if\noexpand~}\noexpand#1
+      \expandafter\ifx\csname SETtxiskipindexfileswithbackslash\endcsname\relax
+\errmessage{%
+ERROR: A sorted index file in an obsolete format was skipped.
+To fix this problem, please upgrade your version of 'texi2dvi'
+or 'texi2pdf' to that at <https://ftp.gnu.org/gnu/texinfo>.
+If you are using an old version of 'texindex' (part of the Texinfo
+distribution), you may also need to upgrade to a newer version (at least 6.0).
+You may be able to typeset the index if you run
+'texindex \jobname.\indexname' yourself.
+You could also try setting the 'txiindexescapeisbackslash' flag by
+running a command like
+'texi2dvi -t "@set txiindexescapeisbackslash" \jobname.texi'.  If you do
+this, Texinfo will try to use index files in the old format.
+If you continue to have problems, deleting the index files and starting again
+might help (with 'rm \jobname.?? \jobname.??s')%
+}%
+      \else
+        (Skipped sorted index file in obsolete format)
+      \fi
+    \else
+      \begindoublecolumns
+      \input \jobname.\indexname s
+      \enddoublecolumns
+    \fi
+  \else
+    \begindoublecolumns
+    \catcode`\\=0\relax
+    %
+    % Make @ an escape character to give macros a chance to work.  This
+    % should work because we (hopefully) don't otherwise use @ in index files.
+    %\catcode`\@=12\relax
+    \catcode`\@=0\relax
+    \input \jobname.\indexname s
+    \enddoublecolumns
+  \fi
+}
+
+% These macros are used by the sorted index file itself.
+% Change them to control the appearance of the index.
+
+{\catcode`\/=13 \catcode`\-=13 \catcode`\^=13 \catcode`\~=13 \catcode`\_=13
+\catcode`\|=13 \catcode`\<=13 \catcode`\>=13 \catcode`\+=13 \catcode`\"=13
+\catcode`\$=3
+\gdef\initialglyphs{%
+  % special control sequences used in the index sort key
+  \let\indexlbrace\{%
+  \let\indexrbrace\}%
+  \let\indexatchar\@%
+  \def\indexbackslash{\math{\backslash}}%
+  %
+  % Some changes for non-alphabetic characters.  Using the glyphs from the
+  % math fonts looks more consistent than the typewriter font used elsewhere
+  % for these characters.
+  \uccode`\~=`\\ \uppercase{\def~{\math{\backslash}}}
+  %
+  % In case @\ is used for backslash
+  \uppercase{\let\\=~}
+  % Can't get bold backslash so don't use bold forward slash
+  \catcode`\/=13
+  \def/{{\secrmnotbold \normalslash}}%
+  \def-{{\normaldash\normaldash}}% en dash `--'
+  \def^{{\chapbf \normalcaret}}%
+  \def~{{\chapbf \normaltilde}}%
+  \def\_{%
+     \leavevmode \kern.07em \vbox{\hrule width.3em height.1ex}\kern .07em }%
+  \def|{$\vert$}%
+  \def<{$\less$}%
+  \def>{$\gtr$}%
+  \def+{$\normalplus$}%
+}}
+
+\def\initial{%
+  \bgroup
+  \initialglyphs
+  \initialx
+}
+
+\def\initialx#1{%
+  % Remove any glue we may have, we'll be inserting our own.
+  \removelastskip
+  %
+  % We like breaks before the index initials, so insert a bonus.
+  % The glue before the bonus allows a little bit of space at the
+  % bottom of a column to reduce an increase in inter-line spacing.
+  \nobreak
+  \vskip 0pt plus 5\baselineskip
+  \penalty -300
+  \vskip 0pt plus -5\baselineskip
+  %
+  % Typeset the initial.  Making this add up to a whole number of
+  % baselineskips increases the chance of the dots lining up from column
+  % to column.  It still won't often be perfect, because of the stretch
+  % we need before each entry, but it's better.
+  %
+  % No shrink because it confuses \balancecolumns.
+  \vskip 1.67\baselineskip plus 1\baselineskip
+  \leftline{\secfonts \kern-0.05em \secbf #1}%
+  % \secfonts is inside the argument of \leftline so that the change of
+  % \baselineskip will not affect any glue inserted before the vbox that
+  % \leftline creates.
+  % Do our best not to break after the initial.
+  \nobreak
+  \vskip .33\baselineskip plus .1\baselineskip
+  \egroup % \initialglyphs
+}
+
+\newdimen\entryrightmargin
+\entryrightmargin=0pt
+
+% \entry typesets a paragraph consisting of the text (#1), dot leaders, and
+% then page number (#2) flushed to the right margin.  It is used for index
+% and table of contents entries.  The paragraph is indented by \leftskip.
+%
+\def\entry{%
+  \begingroup
+    %
+    % Start a new paragraph if necessary, so our assignments below can't
+    % affect previous text.
+    \par
+    %
+    % No extra space above this paragraph.
+    \parskip = 0in
+    %
+    % When reading the text of entry, convert explicit line breaks
+    % from @* into spaces.  The user might give these in long section
+    % titles, for instance.
+    \def\*{\unskip\space\ignorespaces}%
+    \def\entrybreak{\hfil\break}% An undocumented command
+    %
+    % Swallow the left brace of the text (first parameter):
+    \afterassignment\doentry
+    \let\temp =
+}
+\def\entrybreak{\unskip\space\ignorespaces}%
+\def\doentry{%
+    % Save the text of the entry
+    \global\setbox\boxA=\hbox\bgroup
+    \bgroup % Instead of the swallowed brace.
+      \noindent
+      \aftergroup\finishentry
+      % And now comes the text of the entry.
+      % Not absorbing as a macro argument reduces the chance of problems
+      % with catcodes occurring.
+}
+{\catcode`\@=11
+\gdef\finishentry#1{%
+    \egroup % end box A
+    \dimen@ = \wd\boxA % Length of text of entry
+    \global\setbox\boxA=\hbox\bgroup
+      \unhbox\boxA
+      % #1 is the page number.
+      %
+      % Get the width of the page numbers, and only use
+      % leaders if they are present.
+      \global\setbox\boxB = \hbox{#1}%
+      \ifdim\wd\boxB = 0pt
+        \null\nobreak\hfill\ %
+      \else
+        %
+        \null\nobreak\indexdotfill % Have leaders before the page number.
+        %
+        \ifpdforxetex
+          \pdfgettoks#1.%
+          \hskip\skip\thinshrinkable\the\toksA
+        \else
+          \hskip\skip\thinshrinkable #1%
+        \fi
+      \fi
+    \egroup % end \boxA
+    \ifdim\wd\boxB = 0pt
+      \noindent\unhbox\boxA\par
+      \nobreak
+    \else\bgroup
+      % We want the text of the entries to be aligned to the left, and the
+      % page numbers to be aligned to the right.
+      %
+      \parindent = 0pt
+      \advance\leftskip by 0pt plus 1fil
+      \advance\leftskip by 0pt plus -1fill
+      \rightskip = 0pt plus -1fil
+      \advance\rightskip by 0pt plus 1fill
+      % Cause last line, which could consist of page numbers on their own
+      % if the list of page numbers is long, to be aligned to the right.
+      \parfillskip=0pt plus -1fill
+      %
+      \advance\rightskip by \entryrightmargin
+      % Determine how far we can stretch into the margin.
+      % This allows, e.g., "Appendix H  GNU Free Documentation License" to
+      % fit on one line in @letterpaper format.
+      \ifdim\entryrightmargin>2.1em
+        \dimen@i=2.1em
+      \else
+        \dimen@i=0em
+      \fi
+      \advance \parfillskip by 0pt minus 1\dimen@i
+      %
+      \dimen@ii = \hsize
+      \advance\dimen@ii by -1\leftskip
+      \advance\dimen@ii by -1\entryrightmargin
+      \advance\dimen@ii by 1\dimen@i
+      \ifdim\wd\boxA > \dimen@ii % If the entry doesn't fit in one line
+      \ifdim\dimen@ > 0.8\dimen@ii   % due to long index text
+        % Try to split the text roughly evenly.  \dimen@ will be the length of
+        % the first line.
+        \dimen@ = 0.7\dimen@
+        \dimen@ii = \hsize
+        \ifnum\dimen@>\dimen@ii
+          % If the entry is too long (for example, if it needs more than
+          % two lines), use all the space in the first line.
+          \dimen@ = \dimen@ii
+        \fi
+        \advance\leftskip by 0pt plus 1fill % ragged right
+        \advance \dimen@ by 1\rightskip
+        \parshape = 2 0pt \dimen@ 0em \dimen@ii
+        % Ideally we'd add a finite glue at the end of the first line only,
+        % instead of using \parshape with explicit line lengths, but TeX
+        % doesn't seem to provide a way to do such a thing.
+        %
+        % Indent all lines but the first one.
+        \advance\leftskip by 1em
+        \advance\parindent by -1em
+      \fi\fi
+      \indent % start paragraph
+      \unhbox\boxA
+      %
+      % Do not prefer a separate line ending with a hyphen to fewer lines.
+      \finalhyphendemerits = 0
+      %
+      % Word spacing - no stretch
+      \spaceskip=\fontdimen2\font minus \fontdimen4\font
+      %
+      \linepenalty=1000  % Discourage line breaks.
+      \hyphenpenalty=5000  % Discourage hyphenation.
+      %
+      \par % format the paragraph
+    \egroup % The \vbox
+    \fi
+  \endgroup
+}}
+
+\newskip\thinshrinkable
+\skip\thinshrinkable=.15em minus .15em
+
+% Like plain.tex's \dotfill, except uses up at least 1 em.
+% The filll stretch here overpowers both the fil and fill stretch to push
+% the page number to the right.
+\def\indexdotfill{\cleaders
+  \hbox{$\mathsurround=0pt \mkern1.5mu.\mkern1.5mu$}\hskip 1em plus 1filll}
+
+
+\def\primary #1{\line{#1\hfil}}
+
+\def\secondary{\indententry{0.5cm}}
+\def\tertiary{\indententry{1cm}}
+
+\def\indententry#1#2#3{%
+  \bgroup
+  \leftskip=#1
+  \entry{#2}{#3}%
+  \egroup
+}
+
+% Define two-column mode, which we use to typeset indexes.
+% Adapted from the TeXbook, page 416, which is to say,
+% the manmac.tex format used to print the TeXbook itself.
+\catcode`\@=11  % private names
+
+\newbox\partialpage
+\newdimen\doublecolumnhsize
+
+\def\begindoublecolumns{\begingroup % ended by \enddoublecolumns
+  % If not much space left on page, start a new page.
+  \ifdim\pagetotal>0.8\vsize\vfill\eject\fi
+  %
+  % Grab any single-column material above us.
+  \output = {%
+    \savetopmark
+    %
+    \global\setbox\partialpage = \vbox{%
+      % Unvbox the main output page.
+      \unvbox\PAGE
+      \kern-\topskip \kern\baselineskip
+    }%
+  }%
+  \eject % run that output routine to set \partialpage
+  %
+  % Use the double-column output routine for subsequent pages.
+  \output = {\doublecolumnout}%
+  %
+  % Change the page size parameters.  We could do this once outside this
+  % routine, in each of @smallbook, @afourpaper, and the default 8.5x11
+  % format, but then we repeat the same computation.  Repeating a couple
+  % of assignments once per index is clearly meaningless for the
+  % execution time, so we may as well do it in one place.
+  %
+  % First we halve the line length, less a little for the gutter between
+  % the columns.  We compute the gutter based on the line length, so it
+  % changes automatically with the paper format.  The magic constant
+  % below is chosen so that the gutter has the same value (well, +-<1pt)
+  % as it did when we hard-coded it.
+  %
+  % We put the result in a separate register, \doublecolumhsize, so we
+  % can restore it in \pagesofar, after \hsize itself has (potentially)
+  % been clobbered.
+  %
+  \doublecolumnhsize = \hsize
+    \advance\doublecolumnhsize by -.04154\hsize
+    \divide\doublecolumnhsize by 2
+  \hsize = \doublecolumnhsize
+  %
+  % Get the available space for the double columns -- the normal
+  % (undoubled) page height minus any material left over from the
+  % previous page.
+  \advance\vsize by -\ht\partialpage
+  \vsize = 2\vsize
+  %
+  % For the benefit of balancing columns
+  \advance\baselineskip by 0pt plus 0.5pt
+}
+
+% The double-column output routine for all double-column pages except
+% the last, which is done by \balancecolumns.
+%
+\def\doublecolumnout{%
+  %
+  \savetopmark
+  \splittopskip=\topskip \splitmaxdepth=\maxdepth
+  \dimen@ = \vsize
+  \divide\dimen@ by 2
+  %
+  % box0 will be the left-hand column, box2 the right.
+  \setbox0=\vsplit\PAGE to\dimen@ \setbox2=\vsplit\PAGE to\dimen@
+  \global\advance\vsize by 2\ht\partialpage
+  \onepageout\pagesofar % empty except for the first time we are called
+  \unvbox\PAGE
+  \penalty\outputpenalty
+}
+%
+% Re-output the contents of the output page -- any previous material,
+% followed by the two boxes we just split, in box0 and box2.
+\def\pagesofar{%
+  \unvbox\partialpage
+  %
+  \hsize = \doublecolumnhsize
+  \wd0=\hsize \wd2=\hsize
+  \hbox to\txipagewidth{\box0\hfil\box2}%
+}
+
+
+% Finished with double columns.
+\def\enddoublecolumns{%
+  % The following penalty ensures that the page builder is exercised
+  % _before_ we change the output routine.  This is necessary in the
+  % following situation:
+  %
+  % The last section of the index consists only of a single entry.
+  % Before this section, \pagetotal is less than \pagegoal, so no
+  % break occurs before the last section starts.  However, the last
+  % section, consisting of \initial and the single \entry, does not
+  % fit on the page and has to be broken off.  Without the following
+  % penalty the page builder will not be exercised until \eject
+  % below, and by that time we'll already have changed the output
+  % routine to the \balancecolumns version, so the next-to-last
+  % double-column page will be processed with \balancecolumns, which
+  % is wrong:  The two columns will go to the main vertical list, with
+  % the broken-off section in the recent contributions.  As soon as
+  % the output routine finishes, TeX starts reconsidering the page
+  % break.  The two columns and the broken-off section both fit on the
+  % page, because the two columns now take up only half of the page
+  % goal.  When TeX sees \eject from below which follows the final
+  % section, it invokes the new output routine that we've set after
+  % \balancecolumns below; \onepageout will try to fit the two columns
+  % and the final section into the vbox of \txipageheight (see
+  % \pagebody), causing an overfull box.
+  %
+  % Note that glue won't work here, because glue does not exercise the
+  % page builder, unlike penalties (see The TeXbook, pp. 280-281).
+  \penalty0
+  %
+  \output = {%
+    % Split the last of the double-column material.
+    \savetopmark
+    \balancecolumns
+  }%
+  \eject % call the \output just set
+  \ifdim\pagetotal=0pt
+    % Having called \balancecolumns once, we do not
+    % want to call it again.  Therefore, reset \output to its normal
+    % definition right away.
+    \global\output=\expandafter{\the\defaultoutput}
+    %
+    \endgroup % started in \begindoublecolumns
+    % Leave the double-column material on the current page, no automatic
+    % page break.
+    \box\balancedcolumns
+    %
+    % \pagegoal was set to the doubled \vsize above, since we restarted
+    % the current page.  We're now back to normal single-column
+    % typesetting, so reset \pagegoal to the normal \vsize.
+    \global\vsize = \txipageheight %
+    \pagegoal = \txipageheight %
+  \else
+    % We had some left-over material.  This might happen when \doublecolumnout
+    % is called in \balancecolumns.  Try again.
+    \expandafter\enddoublecolumns
+  \fi
+}
+\newbox\balancedcolumns
+\setbox\balancedcolumns=\vbox{shouldnt see this}%
+%
+% Only called for the last of the double column material.  \doublecolumnout
+% does the others.
+\def\balancecolumns{%
+  \setbox0 = \vbox{\unvbox\PAGE}% like \box255 but more efficient, see p.120.
+  \dimen@ = \ht0
+  \ifdim\dimen@<7\baselineskip
+    % Don't split a short final column in two.
+    \setbox2=\vbox{}%
+    \global\setbox\balancedcolumns=\vbox{\pagesofar}%
+  \else
+    % double the leading vertical space
+    \advance\dimen@ by \topskip
+    \advance\dimen@ by-\baselineskip
+    \divide\dimen@ by 2 % target to split to
+    \dimen@ii = \dimen@
+    \splittopskip = \topskip
+    % Loop until left column is at least as high as the right column.
+    {%
+      \vbadness = 10000
+      \loop
+        \global\setbox3 = \copy0
+        \global\setbox1 = \vsplit3 to \dimen@
+      \ifdim\ht1<\ht3
+        \global\advance\dimen@ by 1pt
+      \repeat
+    }%
+    % Now the left column is in box 1, and the right column in box 3.
+    %
+    % Check whether the left column has come out higher than the page itself.
+    % (Note that we have doubled \vsize for the double columns, so
+    % the actual height of the page is 0.5\vsize).
+    \ifdim2\ht1>\vsize
+      % It appears that we have been called upon to balance too much material.
+      % Output some of it with \doublecolumnout, leaving the rest on the page.
+      \setbox\PAGE=\box0
+      \doublecolumnout
+    \else
+      % Compare the heights of the two columns.
+      \ifdim4\ht1>5\ht3
+        % Column heights are too different, so don't make their bottoms
+        % flush with each other.
+        \setbox2=\vbox to \ht1 {\unvbox3\vfill}%
+        \setbox0=\vbox to \ht1 {\unvbox1\vfill}%
+      \else
+        % Make column bottoms flush with each other.
+        \setbox2=\vbox to\ht1{\unvbox3\unskip}%
+        \setbox0=\vbox to\ht1{\unvbox1\unskip}%
+      \fi
+      \global\setbox\balancedcolumns=\vbox{\pagesofar}%
+    \fi
+  \fi
+  %
+}
+\catcode`\@ = \other
+
+
+\message{sectioning,}
+% Chapters, sections, etc.
+
+% Let's start with @part.
+\outer\parseargdef\part{\partzzz{#1}}
+\def\partzzz#1{%
+  \chapoddpage
+  \null
+  \vskip.3\vsize  % move it down on the page a bit
+  \begingroup
+    \noindent \titlefonts\rm #1\par % the text
+    \let\lastnode=\empty      % no node to associate with
+    \writetocentry{part}{#1}{}% but put it in the toc
+    \headingsoff              % no headline or footline on the part page
+    % This outputs a mark at the end of the page that clears \thischapter
+    % and \thissection, as is done in \startcontents.
+    \let\pchapsepmacro\relax
+    \chapmacro{}{Yomitfromtoc}{}%
+    \chapoddpage
+  \endgroup
+}
+
+% \unnumberedno is an oxymoron.  But we count the unnumbered
+% sections so that we can refer to them unambiguously in the pdf
+% outlines by their "section number".  We avoid collisions with chapter
+% numbers by starting them at 10000.  (If a document ever has 10000
+% chapters, we're in trouble anyway, I'm sure.)
+\newcount\unnumberedno \unnumberedno = 10000
+\newcount\chapno
+\newcount\secno        \secno=0
+\newcount\subsecno     \subsecno=0
+\newcount\subsubsecno  \subsubsecno=0
+
+% This counter is funny since it counts through charcodes of letters A, B, ...
+\newcount\appendixno  \appendixno = `\@
+%
+% \def\appendixletter{\char\the\appendixno}
+% We do the following ugly conditional instead of the above simple
+% construct for the sake of pdftex, which needs the actual
+% letter in the expansion, not just typeset.
+%
+\def\appendixletter{%
+  \ifnum\appendixno=`A A%
+  \else\ifnum\appendixno=`B B%
+  \else\ifnum\appendixno=`C C%
+  \else\ifnum\appendixno=`D D%
+  \else\ifnum\appendixno=`E E%
+  \else\ifnum\appendixno=`F F%
+  \else\ifnum\appendixno=`G G%
+  \else\ifnum\appendixno=`H H%
+  \else\ifnum\appendixno=`I I%
+  \else\ifnum\appendixno=`J J%
+  \else\ifnum\appendixno=`K K%
+  \else\ifnum\appendixno=`L L%
+  \else\ifnum\appendixno=`M M%
+  \else\ifnum\appendixno=`N N%
+  \else\ifnum\appendixno=`O O%
+  \else\ifnum\appendixno=`P P%
+  \else\ifnum\appendixno=`Q Q%
+  \else\ifnum\appendixno=`R R%
+  \else\ifnum\appendixno=`S S%
+  \else\ifnum\appendixno=`T T%
+  \else\ifnum\appendixno=`U U%
+  \else\ifnum\appendixno=`V V%
+  \else\ifnum\appendixno=`W W%
+  \else\ifnum\appendixno=`X X%
+  \else\ifnum\appendixno=`Y Y%
+  \else\ifnum\appendixno=`Z Z%
+  % The \the is necessary, despite appearances, because \appendixletter is
+  % expanded while writing the .toc file.  \char\appendixno is not
+  % expandable, thus it is written literally, thus all appendixes come out
+  % with the same letter (or @) in the toc without it.
+  \else\char\the\appendixno
+  \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
+  \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi}
+
+% Each @chapter defines these (using marks) as the number+name, number
+% and name of the chapter.  Page headings and footings can use
+% these.  @section does likewise.
+\def\thischapter{}
+\def\thischapternum{}
+\def\thischaptername{}
+\def\thissection{}
+\def\thissectionnum{}
+\def\thissectionname{}
+
+\newcount\absseclevel % used to calculate proper heading level
+\newcount\secbase\secbase=0 % @raisesections/@lowersections modify this count
+
+% @raisesections: treat @section as chapter, @subsection as section, etc.
+\def\raisesections{\global\advance\secbase by -1}
+
+% @lowersections: treat @chapter as section, @section as subsection, etc.
+\def\lowersections{\global\advance\secbase by 1}
+
+% we only have subsub.
+\chardef\maxseclevel = 3
+%
+% A numbered section within an unnumbered changes to unnumbered too.
+% To achieve this, remember the "biggest" unnum. sec. we are currently in:
+\chardef\unnlevel = \maxseclevel
+%
+% Trace whether the current chapter is an appendix or not:
+% \chapheadtype is "N" or "A", unnumbered chapters are ignored.
+\def\chapheadtype{N}
+
+% Choose a heading macro
+% #1 is heading type
+% #2 is heading level
+% #3 is text for heading
+\def\genhead#1#2#3{%
+  % Compute the abs. sec. level:
+  \absseclevel=#2
+  \advance\absseclevel by \secbase
+  % Make sure \absseclevel doesn't fall outside the range:
+  \ifnum \absseclevel < 0
+    \absseclevel = 0
+  \else
+    \ifnum \absseclevel > 3
+      \absseclevel = 3
+    \fi
+  \fi
+  % The heading type:
+  \def\headtype{#1}%
+  \if \headtype U%
+    \ifnum \absseclevel < \unnlevel
+      \chardef\unnlevel = \absseclevel
+    \fi
+  \else
+    % Check for appendix sections:
+    \ifnum \absseclevel = 0
+      \edef\chapheadtype{\headtype}%
+    \else
+      \if \headtype A\if \chapheadtype N%
+	\errmessage{@appendix... within a non-appendix chapter}%
+      \fi\fi
+    \fi
+    % Check for numbered within unnumbered:
+    \ifnum \absseclevel > \unnlevel
+      \def\headtype{U}%
+    \else
+      \chardef\unnlevel = 3
+    \fi
+  \fi
+  % Now print the heading:
+  \if \headtype U%
+    \ifcase\absseclevel
+	\unnumberedzzz{#3}%
+    \or \unnumberedseczzz{#3}%
+    \or \unnumberedsubseczzz{#3}%
+    \or \unnumberedsubsubseczzz{#3}%
+    \fi
+  \else
+    \if \headtype A%
+      \ifcase\absseclevel
+	  \appendixzzz{#3}%
+      \or \appendixsectionzzz{#3}%
+      \or \appendixsubseczzz{#3}%
+      \or \appendixsubsubseczzz{#3}%
+      \fi
+    \else
+      \ifcase\absseclevel
+	  \chapterzzz{#3}%
+      \or \seczzz{#3}%
+      \or \numberedsubseczzz{#3}%
+      \or \numberedsubsubseczzz{#3}%
+      \fi
+    \fi
+  \fi
+  \suppressfirstparagraphindent
+}
+
+% an interface:
+\def\numhead{\genhead N}
+\def\apphead{\genhead A}
+\def\unnmhead{\genhead U}
+
+% @chapter, @appendix, @unnumbered.  Increment top-level counter, reset
+% all lower-level sectioning counters to zero.
+%
+% Also set \chaplevelprefix, which we prepend to @float sequence numbers
+% (e.g., figures), q.v.  By default (before any chapter), that is empty.
+\let\chaplevelprefix = \empty
+%
+\outer\parseargdef\chapter{\numhead0{#1}} % normally numhead0 calls chapterzzz
+\def\chapterzzz#1{%
+  % section resetting is \global in case the chapter is in a group, such
+  % as an @include file.
+  \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
+    \global\advance\chapno by 1
+  %
+  % Used for \float.
+  \gdef\chaplevelprefix{\the\chapno.}%
+  \resetallfloatnos
+  %
+  % \putwordChapter can contain complex things in translations.
+  \toks0=\expandafter{\putwordChapter}%
+  \message{\the\toks0 \space \the\chapno}%
+  %
+  % Write the actual heading.
+  \chapmacro{#1}{Ynumbered}{\the\chapno}%
+  %
+  % So @section and the like are numbered underneath this chapter.
+  \global\let\section = \numberedsec
+  \global\let\subsection = \numberedsubsec
+  \global\let\subsubsection = \numberedsubsubsec
+}
+
+\outer\parseargdef\appendix{\apphead0{#1}} % normally calls appendixzzz
+%
+\def\appendixzzz#1{%
+  \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
+    \global\advance\appendixno by 1
+  \gdef\chaplevelprefix{\appendixletter.}%
+  \resetallfloatnos
+  %
+  % \putwordAppendix can contain complex things in translations.
+  \toks0=\expandafter{\putwordAppendix}%
+  \message{\the\toks0 \space \appendixletter}%
+  %
+  \chapmacro{#1}{Yappendix}{\appendixletter}%
+  %
+  \global\let\section = \appendixsec
+  \global\let\subsection = \appendixsubsec
+  \global\let\subsubsection = \appendixsubsubsec
+}
+
+% normally unnmhead0 calls unnumberedzzz:
+\outer\parseargdef\unnumbered{\unnmhead0{#1}}
+\def\unnumberedzzz#1{%
+  \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
+    \global\advance\unnumberedno by 1
+  %
+  % Since an unnumbered has no number, no prefix for figures.
+  \global\let\chaplevelprefix = \empty
+  \resetallfloatnos
+  %
+  % This used to be simply \message{#1}, but TeX fully expands the
+  % argument to \message.  Therefore, if #1 contained @-commands, TeX
+  % expanded them.  For example, in `@unnumbered The @cite{Book}', TeX
+  % expanded @cite (which turns out to cause errors because \cite is meant
+  % to be executed, not expanded).
+  %
+  % Anyway, we don't want the fully-expanded definition of @cite to appear
+  % as a result of the \message, we just want `@cite' itself.  We use
+  % \the<toks register> to achieve this: TeX expands \the<toks> only once,
+  % simply yielding the contents of <toks register>.  (We also do this for
+  % the toc entries.)
+  \toks0 = {#1}%
+  \message{(\the\toks0)}%
+  %
+  \chapmacro{#1}{Ynothing}{\the\unnumberedno}%
+  %
+  \global\let\section = \unnumberedsec
+  \global\let\subsection = \unnumberedsubsec
+  \global\let\subsubsection = \unnumberedsubsubsec
+}
+
+% @centerchap is like @unnumbered, but the heading is centered.
+\outer\parseargdef\centerchap{%
+  \let\centerparametersmaybe = \centerparameters
+  \unnmhead0{#1}%
+  \let\centerparametersmaybe = \relax
+}
+
+% @top is like @unnumbered.
+\let\top\unnumbered
+
+% Sections.
+%
+\outer\parseargdef\numberedsec{\numhead1{#1}} % normally calls seczzz
+\def\seczzz#1{%
+  \global\subsecno=0 \global\subsubsecno=0  \global\advance\secno by 1
+  \sectionheading{#1}{sec}{Ynumbered}{\the\chapno.\the\secno}%
+}
+
+% normally calls appendixsectionzzz:
+\outer\parseargdef\appendixsection{\apphead1{#1}}
+\def\appendixsectionzzz#1{%
+  \global\subsecno=0 \global\subsubsecno=0  \global\advance\secno by 1
+  \sectionheading{#1}{sec}{Yappendix}{\appendixletter.\the\secno}%
+}
+\let\appendixsec\appendixsection
+
+% normally calls unnumberedseczzz:
+\outer\parseargdef\unnumberedsec{\unnmhead1{#1}}
+\def\unnumberedseczzz#1{%
+  \global\subsecno=0 \global\subsubsecno=0  \global\advance\secno by 1
+  \sectionheading{#1}{sec}{Ynothing}{\the\unnumberedno.\the\secno}%
+}
+
+% Subsections.
+%
+% normally calls numberedsubseczzz:
+\outer\parseargdef\numberedsubsec{\numhead2{#1}}
+\def\numberedsubseczzz#1{%
+  \global\subsubsecno=0  \global\advance\subsecno by 1
+  \sectionheading{#1}{subsec}{Ynumbered}{\the\chapno.\the\secno.\the\subsecno}%
+}
+
+% normally calls appendixsubseczzz:
+\outer\parseargdef\appendixsubsec{\apphead2{#1}}
+\def\appendixsubseczzz#1{%
+  \global\subsubsecno=0  \global\advance\subsecno by 1
+  \sectionheading{#1}{subsec}{Yappendix}%
+                 {\appendixletter.\the\secno.\the\subsecno}%
+}
+
+% normally calls unnumberedsubseczzz:
+\outer\parseargdef\unnumberedsubsec{\unnmhead2{#1}}
+\def\unnumberedsubseczzz#1{%
+  \global\subsubsecno=0  \global\advance\subsecno by 1
+  \sectionheading{#1}{subsec}{Ynothing}%
+                 {\the\unnumberedno.\the\secno.\the\subsecno}%
+}
+
+% Subsubsections.
+%
+% normally numberedsubsubseczzz:
+\outer\parseargdef\numberedsubsubsec{\numhead3{#1}}
+\def\numberedsubsubseczzz#1{%
+  \global\advance\subsubsecno by 1
+  \sectionheading{#1}{subsubsec}{Ynumbered}%
+                 {\the\chapno.\the\secno.\the\subsecno.\the\subsubsecno}%
+}
+
+% normally appendixsubsubseczzz:
+\outer\parseargdef\appendixsubsubsec{\apphead3{#1}}
+\def\appendixsubsubseczzz#1{%
+  \global\advance\subsubsecno by 1
+  \sectionheading{#1}{subsubsec}{Yappendix}%
+                 {\appendixletter.\the\secno.\the\subsecno.\the\subsubsecno}%
+}
+
+% normally unnumberedsubsubseczzz:
+\outer\parseargdef\unnumberedsubsubsec{\unnmhead3{#1}}
+\def\unnumberedsubsubseczzz#1{%
+  \global\advance\subsubsecno by 1
+  \sectionheading{#1}{subsubsec}{Ynothing}%
+                 {\the\unnumberedno.\the\secno.\the\subsecno.\the\subsubsecno}%
+}
+
+% These macros control what the section commands do, according
+% to what kind of chapter we are in (ordinary, appendix, or unnumbered).
+% Define them by default for a numbered chapter.
+\let\section = \numberedsec
+\let\subsection = \numberedsubsec
+\let\subsubsection = \numberedsubsubsec
+
+% Define @majorheading, @heading and @subheading
+
+\def\majorheading{%
+  {\advance\chapheadingskip by 10pt \chapbreak }%
+  \parsearg\chapheadingzzz
+}
+
+\def\chapheading{\chapbreak \parsearg\chapheadingzzz}
+\def\chapheadingzzz#1{%
+  \vbox{\chapfonts \raggedtitlesettings #1\par}%
+  \nobreak\bigskip \nobreak
+  \suppressfirstparagraphindent
+}
+
+% @heading, @subheading, @subsubheading.
+\parseargdef\heading{\sectionheading{#1}{sec}{Yomitfromtoc}{}
+  \suppressfirstparagraphindent}
+\parseargdef\subheading{\sectionheading{#1}{subsec}{Yomitfromtoc}{}
+  \suppressfirstparagraphindent}
+\parseargdef\subsubheading{\sectionheading{#1}{subsubsec}{Yomitfromtoc}{}
+  \suppressfirstparagraphindent}
+
+% These macros generate a chapter, section, etc. heading only
+% (including whitespace, linebreaking, etc. around it),
+% given all the information in convenient, parsed form.
+
+% Args are the skip and penalty (usually negative)
+\def\dobreak#1#2{\par\ifdim\lastskip<#1\removelastskip\penalty#2\vskip#1\fi}
+
+% Parameter controlling skip before chapter headings (if needed)
+\newskip\chapheadingskip
+
+% Define plain chapter starts, and page on/off switching for it.
+\def\chapbreak{\dobreak \chapheadingskip {-4000}}
+
+% Start a new page
+\def\chappager{\par\vfill\supereject}
+
+% \chapoddpage - start on an odd page for a new chapter
+% Because \domark is called before \chapoddpage, the filler page will
+% get the headings for the next chapter, which is wrong.  But we don't
+% care -- we just disable all headings on the filler page.
+\def\chapoddpage{%
+  \chappager
+  \ifodd\pageno \else
+    \begingroup
+      \headingsoff
+      \null
+      \chappager
+    \endgroup
+  \fi
+}
+
+\parseargdef\setchapternewpage{\csname CHAPPAG#1\endcsname}
+
+\def\CHAPPAGoff{%
+\global\let\contentsalignmacro = \chappager
+\global\let\pchapsepmacro=\chapbreak
+\global\def\HEADINGSon{\HEADINGSsinglechapoff}}
+
+\def\CHAPPAGon{%
+\global\let\contentsalignmacro = \chappager
+\global\let\pchapsepmacro=\chappager
+\global\def\HEADINGSon{\HEADINGSsingle}}
+
+\def\CHAPPAGodd{%
+\global\let\contentsalignmacro = \chapoddpage
+\global\let\pchapsepmacro=\chapoddpage
+\global\def\HEADINGSon{\HEADINGSdouble}}
+
+\CHAPPAGon
+
+% \chapmacro - Chapter opening.
+%
+% #1 is the text, #2 is the section type (Ynumbered, Ynothing,
+% Yappendix, Yomitfromtoc), #3 the chapter number.
+% Not used for @heading series.
+%
+% To test against our argument.
+\def\Ynothingkeyword{Ynothing}
+\def\Yappendixkeyword{Yappendix}
+\def\Yomitfromtockeyword{Yomitfromtoc}
+%
+\def\chapmacro#1#2#3{%
+  \expandafter\ifx\thisenv\titlepage\else
+    \checkenv{}% chapters, etc., should not start inside an environment.
+  \fi
+  % Insert the first mark before the heading break (see notes for \domark).
+  \let\prevchapterdefs=\currentchapterdefs
+  \let\prevsectiondefs=\currentsectiondefs
+  \gdef\currentsectiondefs{\gdef\thissectionname{}\gdef\thissectionnum{}%
+                        \gdef\thissection{}}%
+  %
+  \def\temptype{#2}%
+  \ifx\temptype\Ynothingkeyword
+    \gdef\currentchapterdefs{\gdef\thischaptername{#1}\gdef\thischapternum{}%
+                          \gdef\thischapter{\thischaptername}}%
+  \else\ifx\temptype\Yomitfromtockeyword
+    \gdef\currentchapterdefs{\gdef\thischaptername{#1}\gdef\thischapternum{}%
+                          \gdef\thischapter{}}%
+  \else\ifx\temptype\Yappendixkeyword
+    \toks0={#1}%
+    \xdef\currentchapterdefs{%
+      \gdef\noexpand\thischaptername{\the\toks0}%
+      \gdef\noexpand\thischapternum{\appendixletter}%
+      % \noexpand\putwordAppendix avoids expanding indigestible
+      % commands in some of the translations.
+      \gdef\noexpand\thischapter{\noexpand\putwordAppendix{}
+                                 \noexpand\thischapternum:
+                                 \noexpand\thischaptername}%
+    }%
+  \else
+    \toks0={#1}%
+    \xdef\currentchapterdefs{%
+      \gdef\noexpand\thischaptername{\the\toks0}%
+      \gdef\noexpand\thischapternum{\the\chapno}%
+      % \noexpand\putwordChapter avoids expanding indigestible
+      % commands in some of the translations.
+      \gdef\noexpand\thischapter{\noexpand\putwordChapter{}
+                                 \noexpand\thischapternum:
+                                 \noexpand\thischaptername}%
+    }%
+  \fi\fi\fi
+  %
+  % Output the mark.  Pass it through \safewhatsit, to take care of
+  % the preceding space.
+  \safewhatsit\domark
+  %
+  % Insert the chapter heading break.
+  \pchapsepmacro
+  %
+  % Now the second mark, after the heading break.  No break points
+  % between here and the heading.
+  \let\prevchapterdefs=\currentchapterdefs
+  \let\prevsectiondefs=\currentsectiondefs
+  \domark
+  %
+  {%
+    \chapfonts \rm
+    \let\footnote=\errfootnoteheading % give better error message
+    %
+    % Have to define \currentsection before calling \donoderef, because the
+    % xref code eventually uses it.  On the other hand, it has to be called
+    % after \pchapsepmacro, or the headline will change too soon.
+    \gdef\currentsection{#1}%
+    %
+    % Only insert the separating space if we have a chapter/appendix
+    % number, and don't print the unnumbered ``number''.
+    \ifx\temptype\Ynothingkeyword
+      \setbox0 = \hbox{}%
+      \def\toctype{unnchap}%
+    \else\ifx\temptype\Yomitfromtockeyword
+      \setbox0 = \hbox{}% contents like unnumbered, but no toc entry
+      \def\toctype{omit}%
+    \else\ifx\temptype\Yappendixkeyword
+      \setbox0 = \hbox{\putwordAppendix{} #3\enspace}%
+      \def\toctype{app}%
+    \else
+      \setbox0 = \hbox{#3\enspace}%
+      \def\toctype{numchap}%
+    \fi\fi\fi
+    %
+    % Write the toc entry for this chapter.  Must come before the
+    % \donoderef, because we include the current node name in the toc
+    % entry, and \donoderef resets it to empty.
+    \writetocentry{\toctype}{#1}{#3}%
+    %
+    % For pdftex, we have to write out the node definition (aka, make
+    % the pdfdest) after any page break, but before the actual text has
+    % been typeset.  If the destination for the pdf outline is after the
+    % text, then jumping from the outline may wind up with the text not
+    % being visible, for instance under high magnification.
+    \donoderef{#2}%
+    %
+    % Typeset the actual heading.
+    \nobreak % Avoid page breaks at the interline glue.
+    \vbox{\raggedtitlesettings \hangindent=\wd0 \centerparametersmaybe
+          \unhbox0 #1\par}%
+  }%
+  \nobreak\bigskip % no page break after a chapter title
+  \nobreak
+}
+
+% @centerchap -- centered and unnumbered.
+\let\centerparametersmaybe = \relax
+\def\centerparameters{%
+  \advance\rightskip by 3\rightskip
+  \leftskip = \rightskip
+  \parfillskip = 0pt
+}
+
+
+% Section titles.  These macros combine the section number parts and
+% call the generic \sectionheading to do the printing.
+%
+\newskip\secheadingskip
+\def\secheadingbreak{\dobreak \secheadingskip{-1000}}
+
+% Subsection titles.
+\newskip\subsecheadingskip
+\def\subsecheadingbreak{\dobreak \subsecheadingskip{-500}}
+
+% Subsubsection titles.
+\def\subsubsecheadingskip{\subsecheadingskip}
+\def\subsubsecheadingbreak{\subsecheadingbreak}
+
+
+% Print any size, any type, section title.
+%
+% #1 is the text of the title,
+% #2 is the section level (sec/subsec/subsubsec),
+% #3 is the section type (Ynumbered, Ynothing, Yappendix, Yomitfromtoc),
+% #4 is the section number.
+%
+\def\seckeyword{sec}
+%
+\def\sectionheading#1#2#3#4{%
+  {%
+    \def\sectionlevel{#2}%
+    \def\temptype{#3}%
+    %
+    % It is ok for the @heading series commands to appear inside an
+    % environment (it's been historically allowed, though the logic is
+    % dubious), but not the others.
+    \ifx\temptype\Yomitfromtockeyword\else
+      \checkenv{}% non-@*heading should not be in an environment.
+    \fi
+    \let\footnote=\errfootnoteheading
+    %
+    % Switch to the right set of fonts.
+    \csname #2fonts\endcsname \rm
+    %
+    % Insert first mark before the heading break (see notes for \domark).
+    \let\prevsectiondefs=\currentsectiondefs
+    \ifx\temptype\Ynothingkeyword
+      \ifx\sectionlevel\seckeyword
+        \gdef\currentsectiondefs{\gdef\thissectionname{#1}\gdef\thissectionnum{}%
+                              \gdef\thissection{\thissectionname}}%
+      \fi
+    \else\ifx\temptype\Yomitfromtockeyword
+      % Don't redefine \thissection.
+    \else\ifx\temptype\Yappendixkeyword
+      \ifx\sectionlevel\seckeyword
+        \toks0={#1}%
+        \xdef\currentsectiondefs{%
+          \gdef\noexpand\thissectionname{\the\toks0}%
+          \gdef\noexpand\thissectionnum{#4}%
+          % \noexpand\putwordSection avoids expanding indigestible
+          % commands in some of the translations.
+          \gdef\noexpand\thissection{\noexpand\putwordSection{}
+                                     \noexpand\thissectionnum:
+                                     \noexpand\thissectionname}%
+        }%
+      \fi
+    \else
+      \ifx\sectionlevel\seckeyword
+        \toks0={#1}%
+        \xdef\currentsectiondefs{%
+          \gdef\noexpand\thissectionname{\the\toks0}%
+          \gdef\noexpand\thissectionnum{#4}%
+          % \noexpand\putwordSection avoids expanding indigestible
+          % commands in some of the translations.
+          \gdef\noexpand\thissection{\noexpand\putwordSection{}
+                                     \noexpand\thissectionnum:
+                                     \noexpand\thissectionname}%
+        }%
+      \fi
+    \fi\fi\fi
+    %
+    % Go into vertical mode.  Usually we'll already be there, but we
+    % don't want the following whatsit to end up in a preceding paragraph
+    % if the document didn't happen to have a blank line.
+    \par
+    %
+    % Output the mark.  Pass it through \safewhatsit, to take care of
+    % the preceding space.
+    \safewhatsit\domark
+    %
+    % Insert space above the heading.
+    \csname #2headingbreak\endcsname
+    %
+    % Now the second mark, after the heading break.  No break points
+    % between here and the heading.
+    \global\let\prevsectiondefs=\currentsectiondefs
+    \domark
+    %
+    % Only insert the space after the number if we have a section number.
+    \ifx\temptype\Ynothingkeyword
+      \setbox0 = \hbox{}%
+      \def\toctype{unn}%
+      \gdef\currentsection{#1}%
+    \else\ifx\temptype\Yomitfromtockeyword
+      % for @headings -- no section number, don't include in toc,
+      % and don't redefine \currentsection.
+      \setbox0 = \hbox{}%
+      \def\toctype{omit}%
+      \let\sectionlevel=\empty
+    \else\ifx\temptype\Yappendixkeyword
+      \setbox0 = \hbox{#4\enspace}%
+      \def\toctype{app}%
+      \gdef\currentsection{#1}%
+    \else
+      \setbox0 = \hbox{#4\enspace}%
+      \def\toctype{num}%
+      \gdef\currentsection{#1}%
+    \fi\fi\fi
+    %
+    % Write the toc entry (before \donoderef).  See comments in \chapmacro.
+    \writetocentry{\toctype\sectionlevel}{#1}{#4}%
+    %
+    % Write the node reference (= pdf destination for pdftex).
+    % Again, see comments in \chapmacro.
+    \donoderef{#3}%
+    %
+    % Interline glue will be inserted when the vbox is completed.
+    % That glue will be a valid breakpoint for the page, since it'll be
+    % preceded by a whatsit (usually from the \donoderef, or from the
+    % \writetocentry if there was no node).  We don't want to allow that
+    % break, since then the whatsits could end up on page n while the
+    % section is on page n+1, thus toc/etc. are wrong.  Debian bug 276000.
+    \nobreak
+    %
+    % Output the actual section heading.
+    \vbox{\hyphenpenalty=10000 \tolerance=5000 \parindent=0pt \ptexraggedright
+          \hangindent=\wd0  % zero if no section number
+          \unhbox0 #1}%
+  }%
+  % Add extra space after the heading -- half of whatever came above it.
+  % Don't allow stretch, though.
+  \kern .5 \csname #2headingskip\endcsname
+  %
+  % Do not let the kern be a potential breakpoint, as it would be if it
+  % was followed by glue.
+  \nobreak
+  %
+  % We'll almost certainly start a paragraph next, so don't let that
+  % glue accumulate.  (Not a breakpoint because it's preceded by a
+  % discardable item.)  However, when a paragraph is not started next
+  % (\startdefun, \cartouche, \center, etc.), this needs to be wiped out
+  % or the negative glue will cause weirdly wrong output, typically
+  % obscuring the section heading with something else.
+  \vskip-\parskip
+  %
+  % This is so the last item on the main vertical list is a known
+  % \penalty > 10000, so \startdefun, etc., can recognize the situation
+  % and do the needful.
+  \penalty 10001
+}
+
+
+\message{toc,}
+% Table of contents.
+\newwrite\tocfile
+
+% Write an entry to the toc file, opening it if necessary.
+% Called from @chapter, etc.
+%
+% Example usage: \writetocentry{sec}{Section Name}{\the\chapno.\the\secno}
+% We append the current node name (if any) and page number as additional
+% arguments for the \{chap,sec,...}entry macros which will eventually
+% read this.  The node name is used in the pdf outlines as the
+% destination to jump to.
+%
+% We open the .toc file for writing here instead of at @setfilename (or
+% any other fixed time) so that @contents can be anywhere in the document.
+% But if #1 is `omit', then we don't do anything.  This is used for the
+% table of contents chapter openings themselves.
+%
+\newif\iftocfileopened
+\def\omitkeyword{omit}%
+%
+\def\writetocentry#1#2#3{%
+  \edef\writetoctype{#1}%
+  \ifx\writetoctype\omitkeyword \else
+    \iftocfileopened\else
+      \immediate\openout\tocfile = \jobname.toc
+      \global\tocfileopenedtrue
+    \fi
+    %
+    \iflinks
+      {\atdummies
+       \edef\temp{%
+         \write\tocfile{@#1entry{#2}{#3}{\lastnode}{\noexpand\folio}}}%
+       \temp
+      }%
+    \fi
+  \fi
+  %
+  % Tell \shipout to create a pdf destination on each page, if we're
+  % writing pdf.  These are used in the table of contents.  We can't
+  % just write one on every page because the title pages are numbered
+  % 1 and 2 (the page numbers aren't printed), and so are the first
+  % two pages of the document.  Thus, we'd have two destinations named
+  % `1', and two named `2'.
+  \ifpdforxetex
+    \global\pdfmakepagedesttrue
+  \fi
+}
+
+
+% These characters do not print properly in the Computer Modern roman
+% fonts, so we must take special care.  This is more or less redundant
+% with the Texinfo input format setup at the end of this file.
+%
+\def\activecatcodes{%
+  \catcode`\"=\active
+  \catcode`\$=\active
+  \catcode`\<=\active
+  \catcode`\>=\active
+  \catcode`\\=\active
+  \catcode`\^=\active
+  \catcode`\_=\active
+  \catcode`\|=\active
+  \catcode`\~=\active
+}
+
+
+% Read the toc file, which is essentially Texinfo input.
+\def\readtocfile{%
+  \setupdatafile
+  \activecatcodes
+  \input \tocreadfilename
+}
+
+\newskip\contentsrightmargin \contentsrightmargin=1in
+\newcount\savepageno
+\newcount\lastnegativepageno \lastnegativepageno = -1
+
+% Prepare to read what we've written to \tocfile.
+%
+\def\startcontents#1{%
+  % If @setchapternewpage on, and @headings double, the contents should
+  % start on an odd page, unlike chapters.
+  \contentsalignmacro
+  \immediate\closeout\tocfile
+  %
+  % Don't need to put `Contents' or `Short Contents' in the headline.
+  % It is abundantly clear what they are.
+  \chapmacro{#1}{Yomitfromtoc}{}%
+  %
+  \savepageno = \pageno
+  \begingroup                  % Set up to handle contents files properly.
+    \raggedbottom              % Worry more about breakpoints than the bottom.
+    \entryrightmargin=\contentsrightmargin % Don't use the full line length.
+    %
+    % Roman numerals for page numbers.
+    \ifnum \pageno>0 \global\pageno = \lastnegativepageno \fi
+    \def\thistitle{}% no title in double-sided headings
+    % Record where the Roman numerals started.
+    \ifnum\romancount=0 \global\romancount=\pagecount \fi
+}
+
+% redefined for the two-volume lispref.  We always output on
+% \jobname.toc even if this is redefined.
+%
+\def\tocreadfilename{\jobname.toc}
+
+% Normal (long) toc.
+%
+\def\contents{%
+  \startcontents{\putwordTOC}%
+    \openin 1 \tocreadfilename\space
+    \ifeof 1 \else
+      \readtocfile
+    \fi
+    \vfill \eject
+    \contentsalignmacro % in case @setchapternewpage odd is in effect
+    \ifeof 1 \else
+      \pdfmakeoutlines
+    \fi
+    \closein 1
+  \endgroup
+  \contentsendroman
+}
+
+% And just the chapters.
+\def\summarycontents{%
+  \startcontents{\putwordShortTOC}%
+    %
+    \let\partentry = \shortpartentry
+    \let\numchapentry = \shortchapentry
+    \let\appentry = \shortchapentry
+    \let\unnchapentry = \shortunnchapentry
+    % We want a true roman here for the page numbers.
+    \secfonts
+    \let\rm=\shortcontrm \let\bf=\shortcontbf
+    \let\sl=\shortcontsl \let\tt=\shortconttt
+    \rm
+    \hyphenpenalty = 10000
+    \advance\baselineskip by 1pt % Open it up a little.
+    \def\numsecentry##1##2##3##4{}
+    \let\appsecentry = \numsecentry
+    \let\unnsecentry = \numsecentry
+    \let\numsubsecentry = \numsecentry
+    \let\appsubsecentry = \numsecentry
+    \let\unnsubsecentry = \numsecentry
+    \let\numsubsubsecentry = \numsecentry
+    \let\appsubsubsecentry = \numsecentry
+    \let\unnsubsubsecentry = \numsecentry
+    \openin 1 \tocreadfilename\space
+    \ifeof 1 \else
+      \readtocfile
+    \fi
+    \closein 1
+    \vfill \eject
+    \contentsalignmacro % in case @setchapternewpage odd is in effect
+  \endgroup
+  \contentsendroman
+}
+\let\shortcontents = \summarycontents
+
+% Get ready to use Arabic numerals again
+\def\contentsendroman{%
+  \lastnegativepageno = \pageno
+  \global\pageno = \savepageno
+  %
+  % If \romancount > \arabiccount, the contents are at the end of the
+  % document.  Otherwise, advance where the Arabic numerals start for
+  % the page numbers.
+  \ifnum\romancount>\arabiccount\else\global\arabiccount=\pagecount\fi
+}
+
+% Typeset the label for a chapter or appendix for the short contents.
+% The arg is, e.g., `A' for an appendix, or `3' for a chapter.
+%
+\def\shortchaplabel#1{%
+  % This space should be enough, since a single number is .5em, and the
+  % widest letter (M) is 1em, at least in the Computer Modern fonts.
+  % But use \hss just in case.
+  % (This space doesn't include the extra space that gets added after
+  % the label; that gets put in by \shortchapentry above.)
+  %
+  % We'd like to right-justify chapter numbers, but that looks strange
+  % with appendix letters.  And right-justifying numbers and
+  % left-justifying letters looks strange when there is less than 10
+  % chapters.  Have to read the whole toc once to know how many chapters
+  % there are before deciding ...
+  \hbox to 1em{#1\hss}%
+}
+
+% These macros generate individual entries in the table of contents.
+% The first argument is the chapter or section name.
+% The last argument is the page number.
+% The arguments in between are the chapter number, section number, ...
+
+% Parts, in the main contents.  Replace the part number, which doesn't
+% exist, with an empty box.  Let's hope all the numbers have the same width.
+% Also ignore the page number, which is conventionally not printed.
+\def\numeralbox{\setbox0=\hbox{8}\hbox to \wd0{\hfil}}
+\def\partentry#1#2#3#4{%
+  % Add stretch and a bonus for breaking the page before the part heading.
+  % This reduces the chance of the page being broken immediately after the
+  % part heading, before a following chapter heading.
+  \vskip 0pt plus 5\baselineskip
+  \penalty-300
+  \vskip 0pt plus -5\baselineskip
+  \dochapentry{\numeralbox\labelspace#1}{}%
+}
+%
+% Parts, in the short toc.
+\def\shortpartentry#1#2#3#4{%
+  \penalty-300
+  \vskip.5\baselineskip plus.15\baselineskip minus.1\baselineskip
+  \shortchapentry{{\bf #1}}{\numeralbox}{}{}%
+}
+
+% Chapters, in the main contents.
+\def\numchapentry#1#2#3#4{\dochapentry{#2\labelspace#1}{#4}}
+
+% Chapters, in the short toc.
+% See comments in \dochapentry re vbox and related settings.
+\def\shortchapentry#1#2#3#4{%
+  \tocentry{\shortchaplabel{#2}\labelspace #1}{\doshortpageno\bgroup#4\egroup}%
+}
+
+% Appendices, in the main contents.
+% Need the word Appendix, and a fixed-size box.
+%
+\def\appendixbox#1{%
+  % We use M since it's probably the widest letter.
+  \setbox0 = \hbox{\putwordAppendix{} M}%
+  \hbox to \wd0{\putwordAppendix{} #1\hss}}
+%
+\def\appentry#1#2#3#4{\dochapentry{\appendixbox{#2}\hskip.7em#1}{#4}}
+
+% Unnumbered chapters.
+\def\unnchapentry#1#2#3#4{\dochapentry{#1}{#4}}
+\def\shortunnchapentry#1#2#3#4{\tocentry{#1}{\doshortpageno\bgroup#4\egroup}}
+
+% Sections.
+\def\numsecentry#1#2#3#4{\dosecentry{#2\labelspace#1}{#4}}
+\let\appsecentry=\numsecentry
+\def\unnsecentry#1#2#3#4{\dosecentry{#1}{#4}}
+
+% Subsections.
+\def\numsubsecentry#1#2#3#4{\dosubsecentry{#2\labelspace#1}{#4}}
+\let\appsubsecentry=\numsubsecentry
+\def\unnsubsecentry#1#2#3#4{\dosubsecentry{#1}{#4}}
+
+% And subsubsections.
+\def\numsubsubsecentry#1#2#3#4{\dosubsubsecentry{#2\labelspace#1}{#4}}
+\let\appsubsubsecentry=\numsubsubsecentry
+\def\unnsubsubsecentry#1#2#3#4{\dosubsubsecentry{#1}{#4}}
+
+% This parameter controls the indentation of the various levels.
+% Same as \defaultparindent.
+\newdimen\tocindent \tocindent = 15pt
+
+% Now for the actual typesetting. In all these, #1 is the text and #2 is the
+% page number.
+%
+% If the toc has to be broken over pages, we want it to be at chapters
+% if at all possible; hence the \penalty.
+\def\dochapentry#1#2{%
+   \penalty-300 \vskip1\baselineskip plus.33\baselineskip minus.25\baselineskip
+   \begingroup
+     % Move the page numbers slightly to the right
+     \advance\entryrightmargin by -0.05em
+     \chapentryfonts
+     \tocentry{#1}{\dopageno\bgroup#2\egroup}%
+   \endgroup
+   \nobreak\vskip .25\baselineskip plus.1\baselineskip
+}
+
+\def\dosecentry#1#2{\begingroup
+  \secentryfonts \leftskip=\tocindent
+  \tocentry{#1}{\dopageno\bgroup#2\egroup}%
+\endgroup}
+
+\def\dosubsecentry#1#2{\begingroup
+  \subsecentryfonts \leftskip=2\tocindent
+  \tocentry{#1}{\dopageno\bgroup#2\egroup}%
+\endgroup}
+
+\def\dosubsubsecentry#1#2{\begingroup
+  \subsubsecentryfonts \leftskip=3\tocindent
+  \tocentry{#1}{\dopageno\bgroup#2\egroup}%
+\endgroup}
+
+% We use the same \entry macro as for the index entries.
+\let\tocentry = \entry
+
+% Space between chapter (or whatever) number and the title.
+\def\labelspace{\hskip1em \relax}
+
+\def\dopageno#1{{\rm #1}}
+\def\doshortpageno#1{{\rm #1}}
+
+\def\chapentryfonts{\secfonts \rm}
+\def\secentryfonts{\textfonts}
+\def\subsecentryfonts{\textfonts}
+\def\subsubsecentryfonts{\textfonts}
+
+
+\message{environments,}
+% @foo ... @end foo.
+
+% @tex ... @end tex    escapes into raw TeX temporarily.
+% One exception: @ is still an escape character, so that @end tex works.
+% But \@ or @@ will get a plain @ character.
+
+\envdef\tex{%
+  \setregularquotes
+  \catcode `\\=0 \catcode `\{=1 \catcode `\}=2
+  \catcode `\$=3 \catcode `\&=4 \catcode `\#=6
+  \catcode `\^=7 \catcode `\_=8 \catcode `\~=\active \let~=\tie
+  \catcode `\%=14
+  \catcode `\+=\other
+  \catcode `\"=\other
+  \catcode `\|=\other
+  \catcode `\<=\other
+  \catcode `\>=\other
+  \catcode `\`=\other
+  \catcode `\'=\other
+  %
+  % ' is active in math mode (mathcode"8000).  So reset it, and all our
+  % other math active characters (just in case), to plain's definitions.
+  \mathactive
+  %
+  % Inverse of the list at the beginning of the file.
+  \let\b=\ptexb
+  \let\bullet=\ptexbullet
+  \let\c=\ptexc
+  \let\,=\ptexcomma
+  \let\.=\ptexdot
+  \let\dots=\ptexdots
+  \let\equiv=\ptexequiv
+  \let\!=\ptexexclam
+  \let\i=\ptexi
+  \let\indent=\ptexindent
+  \let\noindent=\ptexnoindent
+  \let\{=\ptexlbrace
+  \let\+=\tabalign
+  \let\}=\ptexrbrace
+  \let\/=\ptexslash
+  \let\sp=\ptexsp
+  \let\*=\ptexstar
+  %\let\sup=\ptexsup % do not redefine, we want @sup to work in math mode
+  \let\t=\ptext
+  \expandafter \let\csname top\endcsname=\ptextop  % we've made it outer
+  \let\frenchspacing=\plainfrenchspacing
+  %
+  \def\endldots{\mathinner{\ldots\ldots\ldots\ldots}}%
+  \def\enddots{\relax\ifmmode\endldots\else$\mathsurround=0pt \endldots\,$\fi}%
+  \def\@{@}%
+}
+% There is no need to define \Etex.
+
+% Define @lisp ... @end lisp.
+% @lisp environment forms a group so it can rebind things,
+% including the definition of @end lisp (which normally is erroneous).
+
+% Amount to narrow the margins by for @lisp.
+\newskip\lispnarrowing \lispnarrowing=0.4in
+
+% This is the definition that ^^M gets inside @lisp, @example, and other
+% such environments.  \null is better than a space, since it doesn't
+% have any width.
+\def\lisppar{\null\endgraf}
+
+% This space is always present above and below environments.
+\newskip\envskipamount \envskipamount = 0pt
+
+% Make spacing and below environment symmetrical.  We use \parskip here
+% to help in doing that, since in @example-like environments \parskip
+% is reset to zero; thus the \afterenvbreak inserts no space -- but the
+% start of the next paragraph will insert \parskip.
+%
+\def\aboveenvbreak{{%
+  % =10000 instead of <10000 because of a special case in \itemzzz and
+  % \sectionheading, q.v.
+  \ifnum \lastpenalty=10000 \else
+    \advance\envskipamount by \parskip
+    \endgraf
+    \ifdim\lastskip<\envskipamount
+      \removelastskip
+      \ifnum\lastpenalty<10000
+        % Penalize breaking before the environment, because preceding text
+        % often leads into it.
+        \penalty100
+      \fi
+      \vskip\envskipamount
+    \fi
+  \fi
+}}
+
+\def\afterenvbreak{{%
+  % =10000 instead of <10000 because of a special case in \itemzzz and
+  % \sectionheading, q.v.
+  \ifnum \lastpenalty=10000 \else
+    \advance\envskipamount by \parskip
+    \endgraf
+    \ifdim\lastskip<\envskipamount
+      \removelastskip
+      % it's not a good place to break if the last penalty was \nobreak
+      % or better ...
+      \ifnum\lastpenalty<10000 \penalty-50 \fi
+      \vskip\envskipamount
+    \fi
+  \fi
+}}
+
+% \nonarrowing is a flag.  If "set", @lisp etc don't narrow margins; it will
+% also clear it, so that its embedded environments do the narrowing again.
+\let\nonarrowing=\relax
+
+% @cartouche ... @end cartouche: draw rectangle w/rounded corners around
+% environment contents.
+
+%
+\def\ctl{{\circle\char'013\hskip -6pt}}% 6pt from pl file: 1/2charwidth
+\def\ctr{{\hskip 6pt\circle\char'010}}
+\def\cbl{{\circle\char'012\hskip -6pt}}
+\def\cbr{{\hskip 6pt\circle\char'011}}
+\def\carttop{\hbox to \cartouter{\hskip\lskip
+        \ctl\leaders\hrule height\circthick\hfil\ctr
+        \hskip\rskip}}
+\def\cartbot{\hbox to \cartouter{\hskip\lskip
+        \cbl\leaders\hrule height\circthick\hfil\cbr
+        \hskip\rskip}}
+%
+\newskip\lskip\newskip\rskip
+
+% only require the font if @cartouche is actually used
+\def\cartouchefontdefs{%
+  \font\circle=lcircle10\relax
+  \circthick=\fontdimen8\circle
+}
+\newdimen\circthick
+\newdimen\cartouter\newdimen\cartinner
+\newskip\normbskip\newskip\normpskip\newskip\normlskip
+
+
+\envdef\cartouche{%
+  \cartouchefontdefs
+  \ifhmode\par\fi  % can't be in the midst of a paragraph.
+  \startsavinginserts
+  \lskip=\leftskip \rskip=\rightskip
+  \leftskip=0pt\rightskip=0pt % we want these *outside*.
+  \cartinner=\hsize \advance\cartinner by-\lskip
+  \advance\cartinner by-\rskip
+  \cartouter=\hsize
+  \advance\cartouter by 18.4pt	% allow for 3pt kerns on either
+				% side, and for 6pt waste from
+				% each corner char, and rule thickness
+  \normbskip=\baselineskip \normpskip=\parskip \normlskip=\lineskip
+  %
+  % If this cartouche directly follows a sectioning command, we need the
+  % \parskip glue (backspaced over by default) or the cartouche can
+  % collide with the section heading.
+  \ifnum\lastpenalty>10000 \vskip\parskip \penalty\lastpenalty \fi
+  %
+  \setbox\groupbox=\vbox\bgroup
+      \baselineskip=0pt\parskip=0pt\lineskip=0pt
+      \carttop
+      \hbox\bgroup
+	  \hskip\lskip
+	  \vrule\kern3pt
+	  \vbox\bgroup
+	      \kern3pt
+	      \hsize=\cartinner
+	      \baselineskip=\normbskip
+	      \lineskip=\normlskip
+	      \parskip=\normpskip
+	      \vskip -\parskip
+	      \comment % For explanation, see the end of def\group.
+}
+\def\Ecartouche{%
+              \ifhmode\par\fi
+	      \kern3pt
+	  \egroup
+	  \kern3pt\vrule
+	  \hskip\rskip
+      \egroup
+      \cartbot
+  \egroup
+  \addgroupbox
+  \checkinserts
+}
+
+
+% This macro is called at the beginning of all the @example variants,
+% inside a group.
+\newdimen\nonfillparindent
+\def\nonfillstart{%
+  \aboveenvbreak
+  \ifdim\hfuzz < 12pt \hfuzz = 12pt \fi % Don't be fussy
+  \sepspaces % Make spaces be word-separators rather than space tokens.
+  \let\par = \lisppar % don't ignore blank lines
+  \obeylines % each line of input is a line of output
+  \parskip = 0pt
+  % Turn off paragraph indentation but redefine \indent to emulate
+  % the normal \indent.
+  \nonfillparindent=\parindent
+  \parindent = 0pt
+  \let\indent\nonfillindent
+  %
+  \emergencystretch = 0pt % don't try to avoid overfull boxes
+  \ifx\nonarrowing\relax
+    \advance \leftskip by \lispnarrowing
+    \exdentamount=\lispnarrowing
+  \else
+    \let\nonarrowing = \relax
+  \fi
+  \let\exdent=\nofillexdent
+}
+
+\begingroup
+\obeyspaces
+% We want to swallow spaces (but not other tokens) after the fake
+% @indent in our nonfill-environments, where spaces are normally
+% active and set to @tie, resulting in them not being ignored after
+% @indent.
+\gdef\nonfillindent{\futurelet\temp\nonfillindentcheck}%
+\gdef\nonfillindentcheck{%
+\ifx\temp %
+\expandafter\nonfillindentgobble%
+\else%
+\leavevmode\nonfillindentbox%
+\fi%
+}%
+\endgroup
+\def\nonfillindentgobble#1{\nonfillindent}
+\def\nonfillindentbox{\hbox to \nonfillparindent{\hss}}
+
+% If you want all examples etc. small: @set dispenvsize small.
+% If you want even small examples the full size: @set dispenvsize nosmall.
+% This affects the following displayed environments:
+%    @example, @display, @format, @lisp, @verbatim
+%
+\def\smallword{small}
+\def\nosmallword{nosmall}
+\let\SETdispenvsize\relax
+\def\setnormaldispenv{%
+  \ifx\SETdispenvsize\smallword
+    % end paragraph for sake of leading, in case document has no blank
+    % line.  This is redundant with what happens in \aboveenvbreak, but
+    % we need to do it before changing the fonts, and it's inconvenient
+    % to change the fonts afterward.
+    \ifnum \lastpenalty=10000 \else \endgraf \fi
+    \smallexamplefonts \rm
+  \fi
+}
+\def\setsmalldispenv{%
+  \ifx\SETdispenvsize\nosmallword
+  \else
+    \ifnum \lastpenalty=10000 \else \endgraf \fi
+    \smallexamplefonts \rm
+  \fi
+}
+
+% We often define two environments, @foo and @smallfoo.
+% Let's do it in one command.  #1 is the env name, #2 the definition.
+\def\makedispenvdef#1#2{%
+  \expandafter\envdef\csname#1\endcsname {\setnormaldispenv #2}%
+  \expandafter\envdef\csname small#1\endcsname {\setsmalldispenv #2}%
+  \expandafter\let\csname E#1\endcsname \afterenvbreak
+  \expandafter\let\csname Esmall#1\endcsname \afterenvbreak
+}
+
+% Define two environment synonyms (#1 and #2) for an environment.
+\def\maketwodispenvdef#1#2#3{%
+  \makedispenvdef{#1}{#3}%
+  \makedispenvdef{#2}{#3}%
+}
+%
+% @lisp: indented, narrowed, typewriter font;
+% @example: same as @lisp.
+%
+% @smallexample and @smalllisp: use smaller fonts.
+% Originally contributed by Pavel@xerox.
+%
+\maketwodispenvdef{lisp}{example}{%
+  \nonfillstart
+  \tt\setcodequotes
+  \let\kbdfont = \kbdexamplefont % Allow @kbd to do something special.
+  \parsearg\gobble
+}
+% @display/@smalldisplay: same as @lisp except keep current font.
+%
+\makedispenvdef{display}{%
+  \nonfillstart
+  \gobble
+}
+
+% @format/@smallformat: same as @display except don't narrow margins.
+%
+\makedispenvdef{format}{%
+  \let\nonarrowing = t%
+  \nonfillstart
+  \gobble
+}
+
+% @flushleft: same as @format, but doesn't obey \SETdispenvsize.
+\envdef\flushleft{%
+  \let\nonarrowing = t%
+  \nonfillstart
+  \gobble
+}
+\let\Eflushleft = \afterenvbreak
+
+% @flushright.
+%
+\envdef\flushright{%
+  \let\nonarrowing = t%
+  \nonfillstart
+  \advance\leftskip by 0pt plus 1fill\relax
+  \gobble
+}
+\let\Eflushright = \afterenvbreak
+
+
+% @raggedright does more-or-less normal line breaking but no right
+% justification.  From plain.tex.
+\envdef\raggedright{%
+  \rightskip0pt plus2.4em \spaceskip.3333em \xspaceskip.5em\relax
+}
+\let\Eraggedright\par
+
+\envdef\raggedleft{%
+  \parindent=0pt \leftskip0pt plus2em
+  \spaceskip.3333em \xspaceskip.5em \parfillskip=0pt
+  \hbadness=10000 % Last line will usually be underfull, so turn off
+                  % badness reporting.
+}
+\let\Eraggedleft\par
+
+\envdef\raggedcenter{%
+  \parindent=0pt \rightskip0pt plus1em \leftskip0pt plus1em
+  \spaceskip.3333em \xspaceskip.5em \parfillskip=0pt
+  \hbadness=10000 % Last line will usually be underfull, so turn off
+                  % badness reporting.
+}
+\let\Eraggedcenter\par
+
+
+% @quotation does normal linebreaking (hence we can't use \nonfillstart)
+% and narrows the margins.  We keep \parskip nonzero in general, since
+% we're doing normal filling.  So, when using \aboveenvbreak and
+% \afterenvbreak, temporarily make \parskip 0.
+%
+\makedispenvdef{quotation}{\quotationstart}
+%
+\def\quotationstart{%
+  \indentedblockstart % same as \indentedblock, but increase right margin too.
+  \ifx\nonarrowing\relax
+    \advance\rightskip by \lispnarrowing
+  \fi
+  \parsearg\quotationlabel
+}
+
+% We have retained a nonzero parskip for the environment, since we're
+% doing normal filling.
+%
+\def\Equotation{%
+  \par
+  \ifx\quotationauthor\thisisundefined\else
+    % indent a bit.
+    \leftline{\kern 2\leftskip \sl ---\quotationauthor}%
+  \fi
+  {\parskip=0pt \afterenvbreak}%
+}
+\def\Esmallquotation{\Equotation}
+
+% If we're given an argument, typeset it in bold with a colon after.
+\def\quotationlabel#1{%
+  \def\temp{#1}%
+  \ifx\temp\empty \else
+    {\bf #1: }%
+  \fi
+}
+
+% @indentedblock is like @quotation, but indents only on the left and
+% has no optional argument.
+%
+\makedispenvdef{indentedblock}{\indentedblockstart}
+%
+\def\indentedblockstart{%
+  {\parskip=0pt \aboveenvbreak}% because \aboveenvbreak inserts \parskip
+  \parindent=0pt
+  %
+  % @cartouche defines \nonarrowing to inhibit narrowing at next level down.
+  \ifx\nonarrowing\relax
+    \advance\leftskip by \lispnarrowing
+    \exdentamount = \lispnarrowing
+  \else
+    \let\nonarrowing = \relax
+  \fi
+}
+
+% Keep a nonzero parskip for the environment, since we're doing normal filling.
+%
+\def\Eindentedblock{%
+  \par
+  {\parskip=0pt \afterenvbreak}%
+}
+\def\Esmallindentedblock{\Eindentedblock}
+
+
+% LaTeX-like @verbatim...@end verbatim and @verb{<char>...<char>}
+% If we want to allow any <char> as delimiter,
+% we need the curly braces so that makeinfo sees the @verb command, eg:
+% `@verbx...x' would look like the '@verbx' command.  --janneke@gnu.org
+%
+% [Knuth]: Donald Ervin Knuth, 1996.  The TeXbook.
+%
+% [Knuth] p.344; only we need to do the other characters Texinfo sets
+% active too.  Otherwise, they get lost as the first character on a
+% verbatim line.
+\def\dospecials{%
+  \do\ \do\\\do\{\do\}\do\$\do\&%
+  \do\#\do\^\do\^^K\do\_\do\^^A\do\%\do\~%
+  \do\<\do\>\do\|\do\@\do+\do\"%
+  % Don't do the quotes -- if we do, @set txicodequoteundirected and
+  % @set txicodequotebacktick will not have effect on @verb and
+  % @verbatim, and ?` and !` ligatures won't get disabled.
+  %\do\`\do\'%
+}
+%
+% [Knuth] p. 380
+\def\uncatcodespecials{%
+  \def\do##1{\catcode`##1=\other}\dospecials}
+%
+% Setup for the @verb command.
+%
+% Eight spaces for a tab
+\begingroup
+  \catcode`\^^I=\active
+  \gdef\tabeightspaces{\catcode`\^^I=\active\def^^I{\ \ \ \ \ \ \ \ }}
+\endgroup
+%
+\def\setupverb{%
+  \tt  % easiest (and conventionally used) font for verbatim
+  \def\par{\leavevmode\endgraf}%
+  \setcodequotes
+  \tabeightspaces
+  % Respect line breaks,
+  % print special symbols as themselves, and
+  % make each space count
+  % must do in this order:
+  \obeylines \uncatcodespecials \sepspaces
+}
+
+% Setup for the @verbatim environment
+%
+% Real tab expansion.
+\newdimen\tabw \setbox0=\hbox{\tt\space} \tabw=8\wd0 % tab amount
+%
+% We typeset each line of the verbatim in an \hbox, so we can handle
+% tabs.
+\newbox\verbbox
+\def\starttabbox{\setbox\verbbox=\hbox\bgroup}
+%
+\begingroup
+  \catcode`\^^I=\active
+  \gdef\tabexpand{%
+    \catcode`\^^I=\active
+    \def^^I{\leavevmode\egroup
+      \dimen\verbbox=\wd\verbbox % the width so far, or since the previous tab
+      \divide\dimen\verbbox by\tabw
+      \multiply\dimen\verbbox by\tabw % compute previous multiple of \tabw
+      \advance\dimen\verbbox by\tabw  % advance to next multiple of \tabw
+      \wd\verbbox=\dimen\verbbox
+      \leavevmode\box\verbbox \starttabbox
+    }%
+  }
+\endgroup
+
+% start the verbatim environment.
+\def\setupverbatim{%
+  \let\nonarrowing = t%
+  \nonfillstart
+  \tt % easiest (and conventionally used) font for verbatim
+  \def\par{\egroup\leavevmode\box\verbbox\endgraf\starttabbox}%
+  \tabexpand
+  \setcodequotes
+  % Respect line breaks,
+  % print special symbols as themselves, and
+  % make each space count.
+  % Must do in this order:
+  \obeylines \uncatcodespecials \sepspaces
+}
+
+% Do the @verb magic: verbatim text is quoted by unique
+% delimiter characters.  Before first delimiter expect a
+% right brace, after last delimiter expect closing brace:
+%
+%    \def\doverb'{'<char>#1<char>'}'{#1}
+%
+% [Knuth] p. 382; only eat outer {}
+\begingroup
+  \catcode`[=1\catcode`]=2\catcode`\{=\other\catcode`\}=\other
+  \gdef\doverb{#1[\def\next##1#1}[##1\endgroup]\next]
+\endgroup
+%
+\def\verb{\begingroup\setupverb\doverb}
+%
+%
+% Do the @verbatim magic: define the macro \doverbatim so that
+% the (first) argument ends when '@end verbatim' is reached, ie:
+%
+%     \def\doverbatim#1@end verbatim{#1}
+%
+% For Texinfo it's a lot easier than for LaTeX,
+% because texinfo's \verbatim doesn't stop at '\end{verbatim}':
+% we need not redefine '\', '{' and '}'.
+%
+% Inspired by LaTeX's verbatim command set [latex.ltx]
+%
+\begingroup
+  \catcode`\ =\active
+  \obeylines %
+  % ignore everything up to the first ^^M, that's the newline at the end
+  % of the @verbatim input line itself.  Otherwise we get an extra blank
+  % line in the output.
+  \xdef\doverbatim#1^^M#2@end verbatim{%
+    \starttabbox#2\egroup\noexpand\end\gobble verbatim}%
+  % We really want {...\end verbatim} in the body of the macro, but
+  % without the active space; thus we have to use \xdef and \gobble.
+  % The \egroup ends the \verbbox started at the end of the last line in
+  % the block.
+\endgroup
+%
+\envdef\verbatim{%
+    \setnormaldispenv\setupverbatim\doverbatim
+}
+\let\Everbatim = \afterenvbreak
+
+
+% @verbatiminclude FILE - insert text of file in verbatim environment.
+%
+\def\verbatiminclude{\parseargusing\filenamecatcodes\doverbatiminclude}
+%
+\def\doverbatiminclude#1{%
+  {%
+    \makevalueexpandable
+    \setupverbatim
+    {%
+      \indexnofonts       % Allow `@@' and other weird things in file names.
+      \wlog{texinfo.tex: doing @verbatiminclude of #1^^J}%
+      \edef\tmp{\noexpand\input #1 }
+      \expandafter
+    }\expandafter\starttabbox\tmp\egroup
+    \afterenvbreak
+  }%
+}
+
+% @copying ... @end copying.
+% Save the text away for @insertcopying later.
+%
+% We save the uninterpreted tokens, rather than creating a box.
+% Saving the text in a box would be much easier, but then all the
+% typesetting commands (@smallbook, font changes, etc.) have to be done
+% beforehand -- and a) we want @copying to be done first in the source
+% file; b) letting users define the frontmatter in as flexible order as
+% possible is desirable.
+%
+\def\copying{\checkenv{}\begingroup\scanargctxt\docopying}
+\def\docopying#1@end copying{\endgroup\def\copyingtext{#1}}
+%
+\def\insertcopying{%
+  \begingroup
+    \parindent = 0pt  % paragraph indentation looks wrong on title page
+    \scanexp\copyingtext
+  \endgroup
+}
+
+
+\message{defuns,}
+% @defun etc.
+
+\newskip\defbodyindent \defbodyindent=.4in
+\newskip\defargsindent \defargsindent=50pt
+\newskip\deflastargmargin \deflastargmargin=18pt
+\newcount\defunpenalty
+
+% Start the processing of @deffn:
+\def\startdefun{%
+  \ifnum\lastpenalty<10000
+    \medbreak
+    \defunpenalty=10003 % Will keep this @deffn together with the
+                        % following @def command, see below.
+  \else
+    % If there are two @def commands in a row, we'll have a \nobreak,
+    % which is there to keep the function description together with its
+    % header.  But if there's nothing but headers, we need to allow a
+    % break somewhere.  Check specifically for penalty 10002, inserted
+    % by \printdefunline, instead of 10000, since the sectioning
+    % commands also insert a nobreak penalty, and we don't want to allow
+    % a break between a section heading and a defun.
+    %
+    % As a further refinement, we avoid "club" headers by signalling
+    % with penalty of 10003 after the very first @deffn in the
+    % sequence (see above), and penalty of 10002 after any following
+    % @def command.
+    \ifnum\lastpenalty=10002 \penalty2000 \else \defunpenalty=10002 \fi
+    %
+    % Similarly, after a section heading, do not allow a break.
+    % But do insert the glue.
+    \medskip  % preceded by discardable penalty, so not a breakpoint
+  \fi
+  %
+  \parindent=0in
+  \advance\leftskip by \defbodyindent
+  \exdentamount=\defbodyindent
+}
+
+\def\dodefunx#1{%
+  % First, check whether we are in the right environment:
+  \checkenv#1%
+  %
+  % As above, allow line break if we have multiple x headers in a row.
+  % It's not a great place, though.
+  \ifnum\lastpenalty=10002 \penalty3000 \else \defunpenalty=10002 \fi
+  %
+  % And now, it's time to reuse the body of the original defun:
+  \expandafter\gobbledefun#1%
+}
+\def\gobbledefun#1\startdefun{}
+
+% \printdefunline \deffnheader{text}
+%
+\def\printdefunline#1#2{%
+  \begingroup
+    % call \deffnheader:
+    #1#2 \endheader
+    % common ending:
+    \interlinepenalty = 10000
+    \advance\rightskip by 0pt plus 1fil\relax
+    \endgraf
+    \nobreak\vskip -\parskip
+    \penalty\defunpenalty  % signal to \startdefun and \dodefunx
+    % Some of the @defun-type tags do not enable magic parentheses,
+    % rendering the following check redundant.  But we don't optimize.
+    \checkparencounts
+  \endgroup
+}
+
+\def\Edefun{\endgraf\medbreak}
+
+% \makedefun{deffn} creates \deffn, \deffnx and \Edeffn;
+% the only thing remaining is to define \deffnheader.
+%
+\def\makedefun#1{%
+  \expandafter\let\csname E#1\endcsname = \Edefun
+  \edef\temp{\noexpand\domakedefun
+    \makecsname{#1}\makecsname{#1x}\makecsname{#1header}}%
+  \temp
+}
+
+% \domakedefun \deffn \deffnx \deffnheader { (defn. of \deffnheader) }
+%
+% Define \deffn and \deffnx, without parameters.
+% \deffnheader has to be defined explicitly.
+%
+\def\domakedefun#1#2#3{%
+  \envdef#1{%
+    \startdefun
+    \doingtypefnfalse    % distinguish typed functions from all else
+    \parseargusing\activeparens{\printdefunline#3}%
+  }%
+  \def#2{\dodefunx#1}%
+  \def#3%
+}
+
+\newif\ifdoingtypefn       % doing typed function?
+\newif\ifrettypeownline    % typeset return type on its own line?
+
+% @deftypefnnewline on|off says whether the return type of typed functions
+% are printed on their own line.  This affects @deftypefn, @deftypefun,
+% @deftypeop, and @deftypemethod.
+%
+\parseargdef\deftypefnnewline{%
+  \def\temp{#1}%
+  \ifx\temp\onword
+    \expandafter\let\csname SETtxideftypefnnl\endcsname
+      = \empty
+  \else\ifx\temp\offword
+    \expandafter\let\csname SETtxideftypefnnl\endcsname
+      = \relax
+  \else
+    \errhelp = \EMsimple
+    \errmessage{Unknown @txideftypefnnl value `\temp',
+                must be on|off}%
+  \fi\fi
+}
+
+% \dosubind {index}{topic}{subtopic}
+%
+% If SUBTOPIC is present, precede it with a space, and call \doind.
+% (At some time during the 20th century, this made a two-level entry in an
+% index such as the operation index.  Nobody seemed to notice the change in
+% behaviour though.)
+\def\dosubind#1#2#3{%
+  \def\thirdarg{#3}%
+  \ifx\thirdarg\empty
+    \doind{#1}{#2}%
+  \else
+    \doind{#1}{#2\space#3}%
+  \fi
+}
+
+% Untyped functions:
+
+% @deffn category name args
+\makedefun{deffn}{\deffngeneral{}}
+
+% @deffn category class name args
+\makedefun{defop}#1 {\defopon{#1\ \putwordon}}
+
+% \defopon {category on}class name args
+\def\defopon#1#2 {\deffngeneral{\putwordon\ \code{#2}}{#1\ \code{#2}} }
+
+% \deffngeneral {subind}category name args
+%
+\def\deffngeneral#1#2 #3 #4\endheader{%
+  \dosubind{fn}{\code{#3}}{#1}%
+  \defname{#2}{}{#3}\magicamp\defunargs{#4\unskip}%
+}
+
+% Typed functions:
+
+% @deftypefn category type name args
+\makedefun{deftypefn}{\deftypefngeneral{}}
+
+% @deftypeop category class type name args
+\makedefun{deftypeop}#1 {\deftypeopon{#1\ \putwordon}}
+
+% \deftypeopon {category on}class type name args
+\def\deftypeopon#1#2 {\deftypefngeneral{\putwordon\ \code{#2}}{#1\ \code{#2}} }
+
+% \deftypefngeneral {subind}category type name args
+%
+\def\deftypefngeneral#1#2 #3 #4 #5\endheader{%
+  \dosubind{fn}{\code{#4}}{#1}%
+  \doingtypefntrue
+  \defname{#2}{#3}{#4}\defunargs{#5\unskip}%
+}
+
+% Typed variables:
+
+% @deftypevr category type var args
+\makedefun{deftypevr}{\deftypecvgeneral{}}
+
+% @deftypecv category class type var args
+\makedefun{deftypecv}#1 {\deftypecvof{#1\ \putwordof}}
+
+% \deftypecvof {category of}class type var args
+\def\deftypecvof#1#2 {\deftypecvgeneral{\putwordof\ \code{#2}}{#1\ \code{#2}} }
+
+% \deftypecvgeneral {subind}category type var args
+%
+\def\deftypecvgeneral#1#2 #3 #4 #5\endheader{%
+  \dosubind{vr}{\code{#4}}{#1}%
+  \defname{#2}{#3}{#4}\defunargs{#5\unskip}%
+}
+
+% Untyped variables:
+
+% @defvr category var args
+\makedefun{defvr}#1 {\deftypevrheader{#1} {} }
+
+% @defcv category class var args
+\makedefun{defcv}#1 {\defcvof{#1\ \putwordof}}
+
+% \defcvof {category of}class var args
+\def\defcvof#1#2 {\deftypecvof{#1}#2 {} }
+
+% Types:
+
+% @deftp category name args
+\makedefun{deftp}#1 #2 #3\endheader{%
+  \doind{tp}{\code{#2}}%
+  \defname{#1}{}{#2}\defunargs{#3\unskip}%
+}
+
+% Remaining @defun-like shortcuts:
+\makedefun{defun}{\deffnheader{\putwordDeffunc} }
+\makedefun{defmac}{\deffnheader{\putwordDefmac} }
+\makedefun{defspec}{\deffnheader{\putwordDefspec} }
+\makedefun{deftypefun}{\deftypefnheader{\putwordDeffunc} }
+\makedefun{defvar}{\defvrheader{\putwordDefvar} }
+\makedefun{defopt}{\defvrheader{\putwordDefopt} }
+\makedefun{deftypevar}{\deftypevrheader{\putwordDefvar} }
+\makedefun{defmethod}{\defopon\putwordMethodon}
+\makedefun{deftypemethod}{\deftypeopon\putwordMethodon}
+\makedefun{defivar}{\defcvof\putwordInstanceVariableof}
+\makedefun{deftypeivar}{\deftypecvof\putwordInstanceVariableof}
+
+% \defname, which formats the name of the @def (not the args).
+% #1 is the category, such as "Function".
+% #2 is the return type, if any.
+% #3 is the function name.
+%
+% We are followed by (but not passed) the arguments, if any.
+%
+\def\defname#1#2#3{%
+  \par
+  % Get the values of \leftskip and \rightskip as they were outside the @def...
+  \advance\leftskip by -\defbodyindent
+  %
+  % Determine if we are typesetting the return type of a typed function
+  % on a line by itself.
+  \rettypeownlinefalse
+  \ifdoingtypefn  % doing a typed function specifically?
+    % then check user option for putting return type on its own line:
+    \expandafter\ifx\csname SETtxideftypefnnl\endcsname\relax \else
+      \rettypeownlinetrue
+    \fi
+  \fi
+  %
+  % How we'll format the category name.  Putting it in brackets helps
+  % distinguish it from the body text that may end up on the next line
+  % just below it.
+  \def\temp{#1}%
+  \setbox0=\hbox{\kern\deflastargmargin \ifx\temp\empty\else [\rm\temp]\fi}
+  %
+  % Figure out line sizes for the paragraph shape.  We'll always have at
+  % least two.
+  \tempnum = 2
+  %
+  % The first line needs space for \box0; but if \rightskip is nonzero,
+  % we need only space for the part of \box0 which exceeds it:
+  \dimen0=\hsize  \advance\dimen0 by -\wd0  \advance\dimen0 by \rightskip
+  %
+  % If doing a return type on its own line, we'll have another line.
+  \ifrettypeownline
+    \advance\tempnum by 1
+    \def\maybeshapeline{0in \hsize}%
+  \else
+    \def\maybeshapeline{}%
+  \fi
+  %
+  % The continuations:
+  \dimen2=\hsize  \advance\dimen2 by -\defargsindent
+  %
+  % The final paragraph shape:
+  \parshape \tempnum  0in \dimen0  \maybeshapeline  \defargsindent \dimen2
+  %
+  % Put the category name at the right margin.
+  \noindent
+  \hbox to 0pt{%
+    \hfil\box0 \kern-\hsize
+    % \hsize has to be shortened this way:
+    \kern\leftskip
+    % Intentionally do not respect \rightskip, since we need the space.
+  }%
+  %
+  % Allow all lines to be underfull without complaint:
+  \tolerance=10000 \hbadness=10000
+  \exdentamount=\defbodyindent
+  {%
+    % defun fonts. We use typewriter by default (used to be bold) because:
+    % . we're printing identifiers, they should be in tt in principle.
+    % . in languages with many accents, such as Czech or French, it's
+    %   common to leave accents off identifiers.  The result looks ok in
+    %   tt, but exceedingly strange in rm.
+    % . we don't want -- and --- to be treated as ligatures.
+    % . this still does not fix the ?` and !` ligatures, but so far no
+    %   one has made identifiers using them :).
+    \df \tt
+    \def\temp{#2}% text of the return type
+    \ifx\temp\empty\else
+      \tclose{\temp}% typeset the return type
+      \ifrettypeownline
+        % put return type on its own line; prohibit line break following:
+        \hfil\vadjust{\nobreak}\break
+      \else
+        \space  % type on same line, so just followed by a space
+      \fi
+    \fi           % no return type
+    #3% output function name
+  }%
+  {\rm\enskip}% hskip 0.5 em of \rmfont
+  %
+  \boldbrax
+  % arguments will be output next, if any.
+}
+
+% Print arguments in slanted roman (not ttsl), inconsistently with using
+% tt for the name.  This is because literal text is sometimes needed in
+% the argument list (groff manual), and ttsl and tt are not very
+% distinguishable.  Prevent hyphenation at `-' chars.
+%
+\def\defunargs#1{%
+  % use sl by default (not ttsl),
+  % tt for the names.
+  \df \sl \hyphenchar\font=0
+  %
+  % On the other hand, if an argument has two dashes (for instance), we
+  % want a way to get ttsl.  We used to recommend @var for that, so
+  % leave the code in, but it's strange for @var to lead to typewriter.
+  % Nowadays we recommend @code, since the difference between a ttsl hyphen
+  % and a tt hyphen is pretty tiny.  @code also disables ?` !`.
+  \def\var##1{{\setregularquotes\ttslanted{##1}}}%
+  #1%
+  \sl\hyphenchar\font=45
+}
+
+% We want ()&[] to print specially on the defun line.
+%
+\def\activeparens{%
+  \catcode`\(=\active \catcode`\)=\active
+  \catcode`\[=\active \catcode`\]=\active
+  \catcode`\&=\active
+}
+
+% Make control sequences which act like normal parenthesis chars.
+\let\lparen = ( \let\rparen = )
+
+% Be sure that we always have a definition for `(', etc.  For example,
+% if the fn name has parens in it, \boldbrax will not be in effect yet,
+% so TeX would otherwise complain about undefined control sequence.
+{
+  \activeparens
+  \global\let(=\lparen \global\let)=\rparen
+  \global\let[=\lbrack \global\let]=\rbrack
+  \global\let& = \&
+
+  \gdef\boldbrax{\let(=\opnr\let)=\clnr\let[=\lbrb\let]=\rbrb}
+  \gdef\magicamp{\let&=\amprm}
+}
+\let\ampchar\&
+
+\newcount\parencount
+
+% If we encounter &foo, then turn on ()-hacking afterwards
+\newif\ifampseen
+\def\amprm#1 {\ampseentrue{\bf\&#1 }}
+
+\def\parenfont{%
+  \ifampseen
+    % At the first level, print parens in roman,
+    % otherwise use the default font.
+    \ifnum \parencount=1 \rm \fi
+  \else
+    % The \sf parens (in \boldbrax) actually are a little bolder than
+    % the contained text.  This is especially needed for [ and ] .
+    \sf
+  \fi
+}
+\def\infirstlevel#1{%
+  \ifampseen
+    \ifnum\parencount=1
+      #1%
+    \fi
+  \fi
+}
+\def\bfafterword#1 {#1 \bf}
+
+\def\opnr{%
+  \global\advance\parencount by 1
+  {\parenfont(}%
+  \infirstlevel \bfafterword
+}
+\def\clnr{%
+  {\parenfont)}%
+  \infirstlevel \sl
+  \global\advance\parencount by -1
+}
+
+\newcount\brackcount
+\def\lbrb{%
+  \global\advance\brackcount by 1
+  {\bf[}%
+}
+\def\rbrb{%
+  {\bf]}%
+  \global\advance\brackcount by -1
+}
+
+\def\checkparencounts{%
+  \ifnum\parencount=0 \else \badparencount \fi
+  \ifnum\brackcount=0 \else \badbrackcount \fi
+}
+% these should not use \errmessage; the glibc manual, at least, actually
+% has such constructs (when documenting function pointers).
+\def\badparencount{%
+  \message{Warning: unbalanced parentheses in @def...}%
+  \global\parencount=0
+}
+\def\badbrackcount{%
+  \message{Warning: unbalanced square brackets in @def...}%
+  \global\brackcount=0
+}
+
+
+\message{macros,}
+% @macro.
+
+% To do this right we need a feature of e-TeX, \scantokens,
+% which we arrange to emulate with a temporary file in ordinary TeX.
+\ifx\eTeXversion\thisisundefined
+  \newwrite\macscribble
+  \def\scantokens#1{%
+    \toks0={#1}%
+    \immediate\openout\macscribble=\jobname.tmp
+    \immediate\write\macscribble{\the\toks0}%
+    \immediate\closeout\macscribble
+    \input \jobname.tmp
+  }
+\fi
+
+\let\E=\expandafter
+
+% Used at the time of macro expansion.
+% Argument is macro body with arguments substituted
+\def\scanmacro#1{%
+  \newlinechar`\^^M
+  % expand the expansion of \eatleadingcr twice to maybe remove a leading
+  % newline (and \else and \fi tokens), then call \eatspaces on the result.
+  \def\xeatspaces##1{%
+    \E\E\E\E\E\E\E\eatspaces\E\E\E\E\E\E\E{\eatleadingcr##1%
+  }}%
+  \def\xempty##1{}%
+  %
+  % Process the macro body under the current catcode regime.
+  \scantokens{#1@comment}%
+  %
+  % The \comment is to remove the \newlinechar added by \scantokens, and
+  % can be noticed by \parsearg.  Note \c isn't used because this means cedilla
+  % in math mode.
+}
+
+% Used for copying and captions
+\def\scanexp#1{%
+  \expandafter\scanmacro\expandafter{#1}%
+}
+
+\newcount\paramno   % Count of parameters
+\newtoks\macname    % Macro name
+\newif\ifrecursive  % Is it recursive?
+
+% List of all defined macros in the form
+%    \commondummyword\macro1\commondummyword\macro2...
+% Currently is also contains all @aliases; the list can be split
+% if there is a need.
+\def\macrolist{}
+
+% Add the macro to \macrolist
+\def\addtomacrolist#1{\expandafter \addtomacrolistxxx \csname#1\endcsname}
+\def\addtomacrolistxxx#1{%
+     \toks0 = \expandafter{\macrolist\commondummyword#1}%
+     \xdef\macrolist{\the\toks0}%
+}
+
+% Utility routines.
+% This does \let #1 = #2, with \csnames; that is,
+%   \let \csname#1\endcsname = \csname#2\endcsname
+% (except of course we have to play expansion games).
+%
+\def\cslet#1#2{%
+  \expandafter\let
+  \csname#1\expandafter\endcsname
+  \csname#2\endcsname
+}
+
+% Trim leading and trailing spaces off a string.
+% Concepts from aro-bend problem 15 (see CTAN).
+{\catcode`\@=11
+\gdef\eatspaces #1{\expandafter\trim@\expandafter{#1 }}
+\gdef\trim@ #1{\trim@@ @#1 @ #1 @ @@}
+\gdef\trim@@ #1@ #2@ #3@@{\trim@@@\empty #2 @}
+\def\unbrace#1{#1}
+\unbrace{\gdef\trim@@@ #1 } #2@{#1}
+}
+
+{\catcode`\^^M=\other%
+\gdef\eatleadingcr#1{\if\noexpand#1\noexpand^^M\else\E#1\fi}}%
+% Warning: this won't work for a delimited argument
+% or for an empty argument
+
+% Trim a single trailing ^^M off a string.
+{\catcode`\^^M=\other \catcode`\Q=3%
+\gdef\eatcr #1{\eatcra #1Q^^MQ}%
+\gdef\eatcra#1^^MQ{\eatcrb#1Q}%
+\gdef\eatcrb#1Q#2Q{#1}%
+}
+
+% Macro bodies are absorbed as an argument in a context where
+% all characters are catcode 10, 11 or 12, except \ which is active
+% (as in normal texinfo). It is necessary to change the definition of \
+% to recognize macro arguments; this is the job of \mbodybackslash.
+%
+% Non-ASCII encodings make 8-bit characters active, so un-activate
+% them to avoid their expansion.  Must do this non-globally, to
+% confine the change to the current group.
+%
+% It's necessary to have hard CRs when the macro is executed. This is
+% done by making ^^M (\endlinechar) catcode 12 when reading the macro
+% body, and then making it the \newlinechar in \scanmacro.
+%
+\def\scanctxt{% used as subroutine
+  \catcode`\"=\other
+  \catcode`\+=\other
+  \catcode`\<=\other
+  \catcode`\>=\other
+  \catcode`\^=\other
+  \catcode`\_=\other
+  \catcode`\|=\other
+  \catcode`\~=\other
+  \passthroughcharstrue
+}
+
+\def\scanargctxt{% used for copying and captions, not macros.
+  \scanctxt
+  \catcode`\@=\other
+  \catcode`\\=\other
+  \catcode`\^^M=\other
+}
+
+\def\macrobodyctxt{% used for @macro definitions
+  \scanctxt
+  \catcode`\ =\other
+  \catcode`\@=\other
+  \catcode`\{=\other
+  \catcode`\}=\other
+  \catcode`\^^M=\other
+  \usembodybackslash
+}
+
+% Used when scanning braced macro arguments.  Note, however, that catcode
+% changes here are ineffectual if the macro invocation was nested inside
+% an argument to another Texinfo command.
+\def\macroargctxt{%
+  \scanctxt
+  \catcode`\ =\active
+  \catcode`\@=\other
+  \catcode`\^^M=\other
+  \catcode`\\=\active
+}
+
+\def\macrolineargctxt{% used for whole-line arguments without braces
+  \scanctxt
+  \catcode`\@=\other
+  \catcode`\{=\other
+  \catcode`\}=\other
+}
+
+% \mbodybackslash is the definition of \ in @macro bodies.
+% It maps \foo\ => \csname macarg.foo\endcsname => #N
+% where N is the macro parameter number.
+% We define \csname macarg.\endcsname to be \realbackslash, so
+% \\ in macro replacement text gets you a backslash.
+%
+{\catcode`@=0 @catcode`@\=@active
+ @gdef@usembodybackslash{@let\=@mbodybackslash}
+ @gdef@mbodybackslash#1\{@csname macarg.#1@endcsname}
+}
+\expandafter\def\csname macarg.\endcsname{\realbackslash}
+
+\def\margbackslash#1{\char`\#1 }
+
+\def\macro{\recursivefalse\parsearg\macroxxx}
+\def\rmacro{\recursivetrue\parsearg\macroxxx}
+
+\def\macroxxx#1{%
+  \getargs{#1}% now \macname is the macname and \argl the arglist
+  \ifx\argl\empty       % no arguments
+     \paramno=0\relax
+  \else
+     \expandafter\parsemargdef \argl;%
+     \if\paramno>256\relax
+       \ifx\eTeXversion\thisisundefined
+         \errhelp = \EMsimple
+         \errmessage{You need eTeX to compile a file with macros with more than 256 arguments}
+       \fi
+     \fi
+  \fi
+  \if1\csname ismacro.\the\macname\endcsname
+     \message{Warning: redefining \the\macname}%
+  \else
+     \expandafter\ifx\csname \the\macname\endcsname \relax
+     \else \errmessage{Macro name \the\macname\space already defined}\fi
+     \global\cslet{macsave.\the\macname}{\the\macname}%
+     \global\expandafter\let\csname ismacro.\the\macname\endcsname=1%
+     \addtomacrolist{\the\macname}%
+  \fi
+  \begingroup \macrobodyctxt
+  \ifrecursive \expandafter\parsermacbody
+  \else \expandafter\parsemacbody
+  \fi}
+
+\parseargdef\unmacro{%
+  \if1\csname ismacro.#1\endcsname
+    \global\cslet{#1}{macsave.#1}%
+    \global\expandafter\let \csname ismacro.#1\endcsname=0%
+    % Remove the macro name from \macrolist:
+    \begingroup
+      \expandafter\let\csname#1\endcsname \relax
+      \let\commondummyword\unmacrodo
+      \xdef\macrolist{\macrolist}%
+    \endgroup
+  \else
+    \errmessage{Macro #1 not defined}%
+  \fi
+}
+
+% Called by \do from \dounmacro on each macro.  The idea is to omit any
+% macro definitions that have been changed to \relax.
+%
+\def\unmacrodo#1{%
+  \ifx #1\relax
+    % remove this
+  \else
+    \noexpand\commondummyword \noexpand#1%
+  \fi
+}
+
+% \getargs -- Parse the arguments to a @macro line.  Set \macname to
+% the name of the macro, and \argl to the braced argument list.
+\def\getargs#1{\getargsxxx#1{}}
+\def\getargsxxx#1#{\getmacname #1 \relax\getmacargs}
+\def\getmacname#1 #2\relax{\macname={#1}}
+\def\getmacargs#1{\def\argl{#1}}
+% This made use of the feature that if the last token of a
+% <parameter list> is #, then the preceding argument is delimited by
+% an opening brace, and that opening brace is not consumed.
+
+% Parse the optional {params} list to @macro or @rmacro.
+% Set \paramno to the number of arguments,
+% and \paramlist to a parameter text for the macro (e.g. #1,#2,#3 for a
+% three-param macro.)  Define \macarg.BLAH for each BLAH in the params
+% list to some hook where the argument is to be expanded.  If there are
+% less than 10 arguments that hook is to be replaced by ##N where N
+% is the position in that list, that is to say the macro arguments are to be
+% defined `a la TeX in the macro body.
+%
+% That gets used by \mbodybackslash (above).
+%
+% If there are 10 or more arguments, a different technique is used: see
+% \parsemmanyargdef.
+%
+\def\parsemargdef#1;{%
+  \paramno=0\def\paramlist{}%
+  \let\hash\relax
+  % \hash is redefined to `#' later to get it into definitions
+  \let\xeatspaces\relax
+  \let\xempty\relax
+  \parsemargdefxxx#1,;,%
+  \ifnum\paramno<10\relax\else
+    \paramno0\relax
+    \parsemmanyargdef@@#1,;,% 10 or more arguments
+  \fi
+}
+\def\parsemargdefxxx#1,{%
+  \if#1;\let\next=\relax
+  \else \let\next=\parsemargdefxxx
+    \advance\paramno by 1
+    \expandafter\edef\csname macarg.\eatspaces{#1}\endcsname
+        {\xeatspaces{\hash\the\paramno\noexpand\xempty{}}}%
+    \edef\paramlist{\paramlist\hash\the\paramno,}%
+  \fi\next}
+% the \xempty{} is to give \eatleadingcr an argument in the case of an
+% empty macro argument.
+
+% \parsemacbody, \parsermacbody
+%
+% Read recursive and nonrecursive macro bodies. (They're different since
+% rec and nonrec macros end differently.)
+%
+% We are in \macrobodyctxt, and the \xdef causes backslashshes in the macro
+% body to be transformed.
+% Set \macrobody to the body of the macro, and call \defmacro.
+%
+{\catcode`\ =\other\long\gdef\parsemacbody#1@end macro{%
+\xdef\macrobody{\eatcr{#1}}\endgroup\defmacro}}%
+{\catcode`\ =\other\long\gdef\parsermacbody#1@end rmacro{%
+\xdef\macrobody{\eatcr{#1}}\endgroup\defmacro}}%
+
+% Make @ a letter, so that we can make private-to-Texinfo macro names.
+\edef\texiatcatcode{\the\catcode`\@}
+\catcode `@=11\relax
+
+%%%%%%%%%%%%%% Code for > 10 arguments only   %%%%%%%%%%%%%%%%%%
+
+% If there are 10 or more arguments, a different technique is used, where the
+% hook remains in the body, and when macro is to be expanded the body is
+% processed again to replace the arguments.
+%
+% In that case, the hook is \the\toks N-1, and we simply set \toks N-1 to the
+% argument N value and then \edef the body (nothing else will expand because of
+% the catcode regime under which the body was input).
+%
+% If you compile with TeX (not eTeX), and you have macros with 10 or more
+% arguments, no macro can have more than 256 arguments (else error).
+%
+% In case that there are 10 or more arguments we parse again the arguments
+% list to set new definitions for the \macarg.BLAH macros corresponding to
+% each BLAH argument. It was anyhow needed to parse already once this list
+% in order to count the arguments, and as macros with at most 9 arguments
+% are by far more frequent than macro with 10 or more arguments, defining
+% twice the \macarg.BLAH macros does not cost too much processing power.
+\def\parsemmanyargdef@@#1,{%
+  \if#1;\let\next=\relax
+  \else
+    \let\next=\parsemmanyargdef@@
+    \edef\tempb{\eatspaces{#1}}%
+    \expandafter\def\expandafter\tempa
+       \expandafter{\csname macarg.\tempb\endcsname}%
+    % Note that we need some extra \noexpand\noexpand, this is because we
+    % don't want \the  to be expanded in the \parsermacbody  as it uses an
+    % \xdef .
+    \expandafter\edef\tempa
+      {\noexpand\noexpand\noexpand\the\toks\the\paramno}%
+    \advance\paramno by 1\relax
+  \fi\next}
+
+
+\let\endargs@\relax
+\let\nil@\relax
+\def\nilm@{\nil@}%
+\long\def\nillm@{\nil@}%
+
+% This macro is expanded during the Texinfo macro expansion, not during its
+% definition.  It gets all the arguments' values and assigns them to macros
+% macarg.ARGNAME
+%
+% #1 is the macro name
+% #2 is the list of argument names
+% #3 is the list of argument values
+\def\getargvals@#1#2#3{%
+  \def\macargdeflist@{}%
+  \def\saveparamlist@{#2}% Need to keep a copy for parameter expansion.
+  \def\paramlist{#2,\nil@}%
+  \def\macroname{#1}%
+  \begingroup
+  \macroargctxt
+  \def\argvaluelist{#3,\nil@}%
+  \def\@tempa{#3}%
+  \ifx\@tempa\empty
+    \setemptyargvalues@
+  \else
+    \getargvals@@
+  \fi
+}
+\def\getargvals@@{%
+  \ifx\paramlist\nilm@
+      % Some sanity check needed here that \argvaluelist is also empty.
+      \ifx\argvaluelist\nillm@
+      \else
+        \errhelp = \EMsimple
+        \errmessage{Too many arguments in macro `\macroname'!}%
+      \fi
+      \let\next\macargexpandinbody@
+  \else
+    \ifx\argvaluelist\nillm@
+       % No more arguments values passed to macro.  Set remaining named-arg
+       % macros to empty.
+       \let\next\setemptyargvalues@
+    \else
+      % pop current arg name into \@tempb
+      \def\@tempa##1{\pop@{\@tempb}{\paramlist}##1\endargs@}%
+      \expandafter\@tempa\expandafter{\paramlist}%
+       % pop current argument value into \@tempc
+      \def\@tempa##1{\longpop@{\@tempc}{\argvaluelist}##1\endargs@}%
+      \expandafter\@tempa\expandafter{\argvaluelist}%
+       % Here \@tempb is the current arg name and \@tempc is the current arg value.
+       % First place the new argument macro definition into \@tempd
+       \expandafter\macname\expandafter{\@tempc}%
+       \expandafter\let\csname macarg.\@tempb\endcsname\relax
+       \expandafter\def\expandafter\@tempe\expandafter{%
+         \csname macarg.\@tempb\endcsname}%
+       \edef\@tempd{\long\def\@tempe{\the\macname}}%
+       \push@\@tempd\macargdeflist@
+       \let\next\getargvals@@
+    \fi
+  \fi
+  \next
+}
+
+\def\push@#1#2{%
+  \expandafter\expandafter\expandafter\def
+  \expandafter\expandafter\expandafter#2%
+  \expandafter\expandafter\expandafter{%
+  \expandafter#1#2}%
+}
+
+% Replace arguments by their values in the macro body, and place the result
+% in macro \@tempa.
+%
+\def\macvalstoargs@{%
+  %  To do this we use the property that token registers that are \the'ed
+  % within an \edef  expand only once. So we are going to place all argument
+  % values into respective token registers.
+  %
+  % First we save the token context, and initialize argument numbering.
+  \begingroup
+    \paramno0\relax
+    % Then, for each argument number #N, we place the corresponding argument
+    % value into a new token list register \toks#N
+    \expandafter\putargsintokens@\saveparamlist@,;,%
+    % Then, we expand the body so that argument are replaced by their
+    % values. The trick for values not to be expanded themselves is that they
+    % are within tokens and that tokens expand only once in an \edef .
+    \edef\@tempc{\csname mac.\macroname .body\endcsname}%
+    % Now we restore the token stack pointer to free the token list registers
+    % which we have used, but we make sure that expanded body is saved after
+    % group.
+    \expandafter
+  \endgroup
+  \expandafter\def\expandafter\@tempa\expandafter{\@tempc}%
+  }
+
+% Define the named-macro outside of this group and then close this group.
+%
+\def\macargexpandinbody@{%
+  \expandafter
+  \endgroup
+  \macargdeflist@
+  % First the replace in body the macro arguments by their values, the result
+  % is in \@tempa .
+  \macvalstoargs@
+  % Then we point at the \norecurse or \gobble (for recursive) macro value
+  % with \@tempb .
+  \expandafter\let\expandafter\@tempb\csname mac.\macroname .recurse\endcsname
+  % Depending on whether it is recursive or not, we need some tailing
+  % \egroup .
+  \ifx\@tempb\gobble
+     \let\@tempc\relax
+  \else
+     \let\@tempc\egroup
+  \fi
+  % And now we do the real job:
+  \edef\@tempd{\noexpand\@tempb{\macroname}\noexpand\scanmacro{\@tempa}\@tempc}%
+  \@tempd
+}
+
+\def\putargsintokens@#1,{%
+  \if#1;\let\next\relax
+  \else
+    \let\next\putargsintokens@
+    % First we allocate the new token list register, and give it a temporary
+    % alias \@tempb .
+    \toksdef\@tempb\the\paramno
+    % Then we place the argument value into that token list register.
+    \expandafter\let\expandafter\@tempa\csname macarg.#1\endcsname
+    \expandafter\@tempb\expandafter{\@tempa}%
+    \advance\paramno by 1\relax
+  \fi
+  \next
+}
+
+% Trailing missing arguments are set to empty.
+%
+\def\setemptyargvalues@{%
+  \ifx\paramlist\nilm@
+    \let\next\macargexpandinbody@
+  \else
+    \expandafter\setemptyargvaluesparser@\paramlist\endargs@
+    \let\next\setemptyargvalues@
+  \fi
+  \next
+}
+
+\def\setemptyargvaluesparser@#1,#2\endargs@{%
+  \expandafter\def\expandafter\@tempa\expandafter{%
+    \expandafter\def\csname macarg.#1\endcsname{}}%
+  \push@\@tempa\macargdeflist@
+  \def\paramlist{#2}%
+}
+
+% #1 is the element target macro
+% #2 is the list macro
+% #3,#4\endargs@ is the list value
+\def\pop@#1#2#3,#4\endargs@{%
+   \def#1{#3}%
+   \def#2{#4}%
+}
+\long\def\longpop@#1#2#3,#4\endargs@{%
+   \long\def#1{#3}%
+   \long\def#2{#4}%
+}
+
+
+%%%%%%%%%%%%%% End of code for > 10 arguments %%%%%%%%%%%%%%%%%%
+
+
+% This defines a Texinfo @macro or @rmacro, called by \parsemacbody.
+%    \macrobody has the body of the macro in it, with placeholders for
+% its parameters, looking like "\xeatspaces{\hash 1}".
+%    \paramno is the number of parameters
+%    \paramlist is a TeX parameter text, e.g. "#1,#2,#3,"
+% There are four cases: macros of zero, one, up to nine, and many arguments.
+% \xdef is used so that macro definitions will survive the file
+% they're defined in: @include reads the file inside a group.
+%
+\def\defmacro{%
+  \let\hash=##% convert placeholders to macro parameter chars
+  \ifnum\paramno=1
+    \def\xeatspaces##1{##1}%
+    % This removes the pair of braces around the argument.  We don't
+    % use \eatspaces, because this can cause ends of lines to be lost
+    % when the argument to \eatspaces is read, leading to line-based
+    % commands like "@itemize" not being read correctly.
+  \else
+    \let\xeatspaces\relax % suppress expansion
+  \fi
+  \ifcase\paramno
+  % 0
+    \expandafter\xdef\csname\the\macname\endcsname{%
+      \bgroup
+        \noexpand\spaceisspace
+        \noexpand\endlineisspace
+        \noexpand\expandafter % skip any whitespace after the macro name.
+        \expandafter\noexpand\csname\the\macname @@@\endcsname}%
+    \expandafter\xdef\csname\the\macname @@@\endcsname{%
+      \egroup
+      \noexpand\scanmacro{\macrobody}}%
+  \or % 1
+    \expandafter\xdef\csname\the\macname\endcsname{%
+       \bgroup
+       \noexpand\braceorline
+       \expandafter\noexpand\csname\the\macname @@@\endcsname}%
+    \expandafter\xdef\csname\the\macname @@@\endcsname##1{%
+      \egroup
+      \noexpand\scanmacro{\macrobody}%
+      }%
+  \else % at most 9
+    \ifnum\paramno<10\relax
+      % @MACNAME sets the context for reading the macro argument
+      % @MACNAME@@ gets the argument, processes backslashes and appends a
+      % comma.
+      % @MACNAME@@@ removes braces surrounding the argument list.
+      % @MACNAME@@@@ scans the macro body with arguments substituted.
+      \expandafter\xdef\csname\the\macname\endcsname{%
+        \bgroup
+        \noexpand\expandafter  % This \expandafter skip any spaces after the
+        \noexpand\macroargctxt % macro before we change the catcode of space.
+        \noexpand\expandafter
+        \expandafter\noexpand\csname\the\macname @@\endcsname}%
+      \expandafter\xdef\csname\the\macname @@\endcsname##1{%
+          \noexpand\passargtomacro
+          \expandafter\noexpand\csname\the\macname @@@\endcsname{##1,}}%
+      \expandafter\xdef\csname\the\macname @@@\endcsname##1{%
+          \expandafter\noexpand\csname\the\macname @@@@\endcsname ##1}%
+      \expandafter\expandafter
+      \expandafter\xdef
+      \expandafter\expandafter
+        \csname\the\macname @@@@\endcsname\paramlist{%
+          \egroup\noexpand\scanmacro{\macrobody}}%
+    \else % 10 or more:
+      \expandafter\xdef\csname\the\macname\endcsname{%
+        \noexpand\getargvals@{\the\macname}{\argl}%
+      }%
+      \global\expandafter\let\csname mac.\the\macname .body\endcsname\macrobody
+      \global\expandafter\let\csname mac.\the\macname .recurse\endcsname\gobble
+    \fi
+  \fi}
+
+\catcode `\@\texiatcatcode\relax % end private-to-Texinfo catcodes
+
+\def\norecurse#1{\bgroup\cslet{#1}{macsave.#1}}
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+{\catcode`\@=0 \catcode`\\=13  % We need to manipulate \ so use @ as escape
+@catcode`@_=11  % private names
+@catcode`@!=11  % used as argument separator
+
+% \passargtomacro#1#2 -
+% Call #1 with a list of tokens #2, with any doubled backslashes in #2
+% compressed to one.
+%
+% This implementation works by expansion, and not execution (so we cannot use
+% \def or similar).  This reduces the risk of this failing in contexts where
+% complete expansion is done with no execution (for example, in writing out to
+% an auxiliary file for an index entry).
+%
+% State is kept in the input stream: the argument passed to
+% @look_ahead, @gobble_and_check_finish and @add_segment is
+%
+% THE_MACRO ARG_RESULT ! {PENDING_BS} NEXT_TOKEN  (... rest of input)
+%
+% where:
+% THE_MACRO - name of the macro we want to call
+% ARG_RESULT - argument list we build to pass to that macro
+% PENDING_BS - either a backslash or nothing
+% NEXT_TOKEN - used to look ahead in the input stream to see what's coming next
+
+@gdef@passargtomacro#1#2{%
+  @add_segment #1!{}@relax#2\@_finish\%
+}
+@gdef@_finish{@_finishx} @global@let@_finishx@relax
+
+% #1 - THE_MACRO ARG_RESULT
+% #2 - PENDING_BS
+% #3 - NEXT_TOKEN
+% #4 used to look ahead
+%
+% If the next token is not a backslash, process the rest of the argument;
+% otherwise, remove the next token.
+@gdef@look_ahead#1!#2#3#4{%
+  @ifx#4\%
+   @expandafter@gobble_and_check_finish
+  @else
+   @expandafter@add_segment
+  @fi#1!{#2}#4#4%
+}
+
+% #1 - THE_MACRO ARG_RESULT
+% #2 - PENDING_BS
+% #3 - NEXT_TOKEN
+% #4 should be a backslash, which is gobbled.
+% #5 looks ahead
+%
+% Double backslash found.  Add a single backslash, and look ahead.
+@gdef@gobble_and_check_finish#1!#2#3#4#5{%
+  @add_segment#1\!{}#5#5%
+}
+
+@gdef@is_fi{@fi}
+
+% #1 - THE_MACRO ARG_RESULT
+% #2 - PENDING_BS
+% #3 - NEXT_TOKEN
+% #4 is input stream until next backslash
+%
+% Input stream is either at the start of the argument, or just after a
+% backslash sequence, either a lone backslash, or a doubled backslash.
+% NEXT_TOKEN contains the first token in the input stream: if it is \finish,
+% finish; otherwise, append to ARG_RESULT the segment of the argument up until
+% the next backslash.  PENDING_BACKSLASH contains a backslash to represent
+% a backslash just before the start of the input stream that has not been
+% added to ARG_RESULT.
+@gdef@add_segment#1!#2#3#4\{%
+@ifx#3@_finish
+  @call_the_macro#1!%
+@else
+  % append the pending backslash to the result, followed by the next segment
+  @expandafter@is_fi@look_ahead#1#2#4!{\}@fi
+  % this @fi is discarded by @look_ahead.
+  % we can't get rid of it with \expandafter because we don't know how
+  % long #4 is.
+}
+
+% #1 - THE_MACRO
+% #2 - ARG_RESULT
+% #3 discards the res of the conditional in @add_segment, and @is_fi ends the
+% conditional.
+@gdef@call_the_macro#1#2!#3@fi{@is_fi #1{#2}}
+
+}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+% \braceorline MAC is used for a one-argument macro MAC.  It checks
+% whether the next non-whitespace character is a {.  It sets the context
+% for reading the argument (slightly different in the two cases).  Then,
+% to read the argument, in the whole-line case, it then calls the regular
+% \parsearg MAC; in the lbrace case, it calls \passargtomacro MAC.
+%
+\def\braceorline#1{\let\macnamexxx=#1\futurelet\nchar\braceorlinexxx}
+\def\braceorlinexxx{%
+  \ifx\nchar\bgroup
+    \macroargctxt
+    \expandafter\passargtomacro
+  \else
+    \macrolineargctxt\expandafter\parsearg
+  \fi \macnamexxx}
+
+
+% @alias.
+% We need some trickery to remove the optional spaces around the equal
+% sign.  Make them active and then expand them all to nothing.
+%
+\def\alias{\parseargusing\obeyspaces\aliasxxx}
+\def\aliasxxx #1{\aliasyyy#1\relax}
+\def\aliasyyy #1=#2\relax{%
+  {%
+    \expandafter\let\obeyedspace=\empty
+    \addtomacrolist{#1}%
+    \xdef\next{\global\let\makecsname{#1}=\makecsname{#2}}%
+  }%
+  \next
+}
+
+
+\message{cross references,}
+
+\newwrite\auxfile
+\newif\ifhavexrefs    % True if xref values are known.
+\newif\ifwarnedxrefs  % True if we warned once that they aren't known.
+
+% @inforef is relatively simple.
+\def\inforef #1{\inforefzzz #1,,,,**}
+\def\inforefzzz #1,#2,#3,#4**{%
+  \putwordSee{} \putwordInfo{} \putwordfile{} \file{\ignorespaces #3{}},
+  node \samp{\ignorespaces#1{}}}
+
+% @node's only job in TeX is to define \lastnode, which is used in
+% cross-references.  The @node line might or might not have commas, and
+% might or might not have spaces before the first comma, like:
+% @node foo , bar , ...
+% We don't want such trailing spaces in the node name.
+%
+\parseargdef\node{\checkenv{}\donode #1 ,\finishnodeparse}
+%
+% also remove a trailing comma, in case of something like this:
+% @node Help-Cross,  ,  , Cross-refs
+\def\donode#1 ,#2\finishnodeparse{\dodonode #1,\finishnodeparse}
+\def\dodonode#1,#2\finishnodeparse{\gdef\lastnode{#1}\omittopnode}
+
+% Used so that the @top node doesn't have to be wrapped in an @ifnottex
+% conditional.
+% \doignore goes to more effort to skip nested conditionals but we don't need
+% that here.
+\def\omittopnode{%
+   \ifx\lastnode\wordTop
+   \expandafter\ignorenode\fi
+}
+\def\wordTop{Top}
+
+% Until the next @node or @bye command, divert output to a box that is not
+% output.
+\def\ignorenode{\setbox\dummybox\vbox\bgroup\def\node{\egroup\node}%
+\ignorenodebye
+}
+
+{\let\bye\relax
+\gdef\ignorenodebye{\let\bye\ignorenodebyedef}
+\gdef\ignorenodebyedef{\egroup(`Top' node ignored)\bye}}
+% The redefinition of \bye here is because it is declared \outer
+
+\let\lastnode=\empty
+
+% Write a cross-reference definition for the current node.  #1 is the
+% type (Ynumbered, Yappendix, Ynothing).
+%
+\def\donoderef#1{%
+  \ifx\lastnode\empty\else
+    \setref{\lastnode}{#1}%
+    \global\let\lastnode=\empty
+  \fi
+}
+
+% @anchor{NAME} -- define xref target at arbitrary point.
+%
+\newcount\savesfregister
+%
+\def\savesf{\relax \ifhmode \savesfregister=\spacefactor \fi}
+\def\restoresf{\relax \ifhmode \spacefactor=\savesfregister \fi}
+\def\anchor#1{\savesf \setref{#1}{Ynothing}\restoresf \ignorespaces}
+
+% \setref{NAME}{SNT} defines a cross-reference point NAME (a node or an
+% anchor), which consists of three parts:
+% 1) NAME-title - the current sectioning name taken from \currentsection,
+%                 or the anchor name.
+% 2) NAME-snt   - section number and type, passed as the SNT arg, or
+%                 empty for anchors.
+% 3) NAME-pg    - the page number.
+%
+% This is called from \donoderef, \anchor, and \dofloat.  In the case of
+% floats, there is an additional part, which is not written here:
+% 4) NAME-lof   - the text as it should appear in a @listoffloats.
+%
+\def\setref#1#2{%
+  \pdfmkdest{#1}%
+  \iflinks
+    {%
+      \requireauxfile
+      \atdummies  % preserve commands, but don't expand them
+      % match definition in \xrdef, \refx, \xrefX.
+      \def\value##1{##1}%
+      \edef\writexrdef##1##2{%
+	\write\auxfile{@xrdef{#1-% #1 of \setref, expanded by the \edef
+	  ##1}{##2}}% these are parameters of \writexrdef
+      }%
+      \toks0 = \expandafter{\currentsection}%
+      \immediate \writexrdef{title}{\the\toks0 }%
+      \immediate \writexrdef{snt}{\csname #2\endcsname}% \Ynumbered etc.
+      \safewhatsit{\writexrdef{pg}{\folio}}% will be written later, at \shipout
+    }%
+  \fi
+}
+
+% @xrefautosectiontitle on|off says whether @section(ing) names are used
+% automatically in xrefs, if the third arg is not explicitly specified.
+% This was provided as a "secret" @set xref-automatic-section-title
+% variable, now it's official.
+%
+\parseargdef\xrefautomaticsectiontitle{%
+  \def\temp{#1}%
+  \ifx\temp\onword
+    \expandafter\let\csname SETxref-automatic-section-title\endcsname
+      = \empty
+  \else\ifx\temp\offword
+    \expandafter\let\csname SETxref-automatic-section-title\endcsname
+      = \relax
+  \else
+    \errhelp = \EMsimple
+    \errmessage{Unknown @xrefautomaticsectiontitle value `\temp',
+                must be on|off}%
+  \fi\fi
+}
+
+%
+% @xref, @pxref, and @ref generate cross-references.  For \xrefX, #1 is
+% the node name, #2 the name of the Info cross-reference, #3 the printed
+% node name, #4 the name of the Info file, #5 the name of the printed
+% manual.  All but the node name can be omitted.
+%
+\def\pxref{\putwordsee{} \xrefXX}
+\def\xref{\putwordSee{} \xrefXX}
+\def\ref{\xrefXX}
+
+\def\xrefXX#1{\def\xrefXXarg{#1}\futurelet\tokenafterxref\xrefXXX}
+\def\xrefXXX{\expandafter\xrefX\expandafter[\xrefXXarg,,,,,,,]}
+%
+\newbox\toprefbox
+\newbox\printedrefnamebox
+\newbox\infofilenamebox
+\newbox\printedmanualbox
+%
+\def\xrefX[#1,#2,#3,#4,#5,#6]{\begingroup
+  \unsepspaces
+  %
+  % Get args without leading/trailing spaces.
+  \def\printedrefname{\ignorespaces #3}%
+  \setbox\printedrefnamebox = \hbox{\printedrefname\unskip}%
+  %
+  \def\infofilename{\ignorespaces #4}%
+  \setbox\infofilenamebox = \hbox{\infofilename\unskip}%
+  %
+  \def\printedmanual{\ignorespaces #5}%
+  \setbox\printedmanualbox  = \hbox{\printedmanual\unskip}%
+  %
+  % If the printed reference name (arg #3) was not explicitly given in
+  % the @xref, figure out what we want to use.
+  \ifdim \wd\printedrefnamebox = 0pt
+    % No printed node name was explicitly given.
+    \expandafter\ifx\csname SETxref-automatic-section-title\endcsname \relax
+      % Not auto section-title: use node name inside the square brackets.
+      \def\printedrefname{\ignorespaces #1}%
+    \else
+      % Auto section-title: use chapter/section title inside
+      % the square brackets if we have it.
+      \ifdim \wd\printedmanualbox > 0pt
+        % It is in another manual, so we don't have it; use node name.
+        \def\printedrefname{\ignorespaces #1}%
+      \else
+        \ifhavexrefs
+          % We (should) know the real title if we have the xref values.
+          \def\printedrefname{\refx{#1-title}}%
+        \else
+          % Otherwise just copy the Info node name.
+          \def\printedrefname{\ignorespaces #1}%
+        \fi%
+      \fi
+    \fi
+  \fi
+  %
+  % Make link in pdf output.
+  \ifpdf
+    % For pdfTeX and LuaTeX
+    {\indexnofonts
+     \makevalueexpandable
+     \turnoffactive
+     % This expands tokens, so do it after making catcode changes, so _
+     % etc. don't get their TeX definitions.  This ignores all spaces in
+     % #4, including (wrongly) those in the middle of the filename.
+     \getfilename{#4}%
+     %
+     % This (wrongly) does not take account of leading or trailing
+     % spaces in #1, which should be ignored.
+     \setpdfdestname{#1}%
+     %
+     \ifx\pdfdestname\empty
+       \def\pdfdestname{Top}% no empty targets
+     \fi
+     %
+     \leavevmode
+     \startlink attr{/Border [0 0 0]}%
+     \ifnum\filenamelength>0
+       goto file{\the\filename.pdf} name{\pdfdestname}%
+     \else
+       goto name{\pdfmkpgn{\pdfdestname}}%
+     \fi
+    }%
+    \setcolor{\linkcolor}%
+  \else
+    \ifx\XeTeXrevision\thisisundefined
+    \else
+      % For XeTeX
+      {\indexnofonts
+       \makevalueexpandable
+       \turnoffactive
+       % This expands tokens, so do it after making catcode changes, so _
+       % etc. don't get their TeX definitions.  This ignores all spaces in
+       % #4, including (wrongly) those in the middle of the filename.
+       \getfilename{#4}%
+       %
+       % This (wrongly) does not take account of leading or trailing
+       % spaces in #1, which should be ignored.
+       \setpdfdestname{#1}%
+       %
+       \ifx\pdfdestname\empty
+         \def\pdfdestname{Top}% no empty targets
+       \fi
+       %
+       \leavevmode
+       \ifnum\filenamelength>0
+         % With default settings,
+         % XeTeX (xdvipdfmx) replaces link destination names with integers.
+         % In this case, the replaced destination names of
+         % remote PDFs are no longer known.  In order to avoid a replacement,
+         % you can use xdvipdfmx's command line option `-C 0x0010'.
+         % If you use XeTeX 0.99996+ (TeX Live 2016+),
+         % this command line option is no longer necessary
+         % because we can use the `dvipdfmx:config' special.
+         \special{pdf:bann << /Border [0 0 0] /Type /Annot /Subtype /Link /A
+           << /S /GoToR /F (\the\filename.pdf) /D (\pdfdestname) >> >>}%
+       \else
+         \special{pdf:bann << /Border [0 0 0] /Type /Annot /Subtype /Link /A
+           << /S /GoTo /D (\pdfdestname) >> >>}%
+       \fi
+      }%
+      \setcolor{\linkcolor}%
+    \fi
+  \fi
+  {%
+    % Have to otherify everything special to allow the \csname to
+    % include an _ in the xref name, etc.
+    \indexnofonts
+    \turnoffactive
+    \def\value##1{##1}%
+    \expandafter\global\expandafter\let\expandafter\Xthisreftitle
+      \csname XR#1-title\endcsname
+  }%
+  %
+  % Float references are printed completely differently: "Figure 1.2"
+  % instead of "[somenode], p.3".  \iffloat distinguishes them by
+  % \Xthisreftitle being set to a magic string.
+  \iffloat\Xthisreftitle
+    % If the user specified the print name (third arg) to the ref,
+    % print it instead of our usual "Figure 1.2".
+    \ifdim\wd\printedrefnamebox = 0pt
+      \refx{#1-snt}%
+    \else
+      \printedrefname
+    \fi
+    %
+    % If the user also gave the printed manual name (fifth arg), append
+    % "in MANUALNAME".
+    \ifdim \wd\printedmanualbox > 0pt
+      \space \putwordin{} \cite{\printedmanual}%
+    \fi
+  \else
+    % node/anchor (non-float) references.
+    %
+    % If we use \unhbox to print the node names, TeX does not insert
+    % empty discretionaries after hyphens, which means that it will not
+    % find a line break at a hyphen in a node names.  Since some manuals
+    % are best written with fairly long node names, containing hyphens,
+    % this is a loss.  Therefore, we give the text of the node name
+    % again, so it is as if TeX is seeing it for the first time.
+    %
+    \ifdim \wd\printedmanualbox > 0pt
+      % Cross-manual reference with a printed manual name.
+      %
+      \crossmanualxref{\cite{\printedmanual\unskip}}%
+    %
+    \else\ifdim \wd\infofilenamebox > 0pt
+      % Cross-manual reference with only an info filename (arg 4), no
+      % printed manual name (arg 5).  This is essentially the same as
+      % the case above; we output the filename, since we have nothing else.
+      %
+      \crossmanualxref{\code{\infofilename\unskip}}%
+    %
+    \else
+      % Reference within this manual.
+      %
+      % Only output a following space if the -snt ref is nonempty, as the ref
+      % will be empty for @unnumbered and @anchor.
+      \setbox2 = \hbox{\ignorespaces \refx{#1-snt}}%
+      \ifdim \wd2 > 0pt \refx{#1-snt}\space\fi
+      %
+      % output the `[mynode]' via the macro below so it can be overridden.
+      \xrefprintnodename\printedrefname
+      %
+      \expandafter\ifx\csname SETtxiomitxrefpg\endcsname\relax
+        % But we always want a comma and a space:
+        ,\space
+        %
+        % output the `page 3'.
+        \turnoffactive \putwordpage\tie\refx{#1-pg}%
+        % Add a , if xref followed by a space
+        \if\space\noexpand\tokenafterxref ,%
+        \else\ifx\	\tokenafterxref ,% @TAB
+        \else\ifx\*\tokenafterxref ,%   @*
+        \else\ifx\ \tokenafterxref ,%   @SPACE
+        \else\ifx\
+                  \tokenafterxref ,%    @NL
+        \else\ifx\tie\tokenafterxref ,% @tie
+        \fi\fi\fi\fi\fi\fi
+      \fi
+    \fi\fi
+  \fi
+  \endlink
+\endgroup}
+
+% Output a cross-manual xref to #1.  Used just above (twice).
+%
+% Only include the text "Section ``foo'' in" if the foo is neither
+% missing or Top.  Thus, @xref{,,,foo,The Foo Manual} outputs simply
+% "see The Foo Manual", the idea being to refer to the whole manual.
+%
+% But, this being TeX, we can't easily compare our node name against the
+% string "Top" while ignoring the possible spaces before and after in
+% the input.  By adding the arbitrary 7sp below, we make it much less
+% likely that a real node name would have the same width as "Top" (e.g.,
+% in a monospaced font).  Hopefully it will never happen in practice.
+%
+% For the same basic reason, we retypeset the "Top" at every
+% reference, since the current font is indeterminate.
+%
+\def\crossmanualxref#1{%
+  \setbox\toprefbox = \hbox{Top\kern7sp}%
+  \setbox2 = \hbox{\ignorespaces \printedrefname \unskip \kern7sp}%
+  \ifdim \wd2 > 7sp  % nonempty?
+    \ifdim \wd2 = \wd\toprefbox \else  % same as Top?
+      \putwordSection{} ``\printedrefname'' \putwordin{}\space
+    \fi
+  \fi
+  #1%
+}
+
+% This macro is called from \xrefX for the `[nodename]' part of xref
+% output.  It's a separate macro only so it can be changed more easily,
+% since square brackets don't work well in some documents.  Particularly
+% one that Bob is working on :).
+%
+\def\xrefprintnodename#1{[#1]}
+
+% Things referred to by \setref.
+%
+\def\Ynothing{}
+\def\Yomitfromtoc{}
+\def\Ynumbered{%
+  \ifnum\secno=0
+    \putwordChapter@tie \the\chapno
+  \else \ifnum\subsecno=0
+    \putwordSection@tie \the\chapno.\the\secno
+  \else \ifnum\subsubsecno=0
+    \putwordSection@tie \the\chapno.\the\secno.\the\subsecno
+  \else
+    \putwordSection@tie \the\chapno.\the\secno.\the\subsecno.\the\subsubsecno
+  \fi\fi\fi
+}
+\def\Yappendix{%
+  \ifnum\secno=0
+     \putwordAppendix@tie @char\the\appendixno{}%
+  \else \ifnum\subsecno=0
+     \putwordSection@tie @char\the\appendixno.\the\secno
+  \else \ifnum\subsubsecno=0
+    \putwordSection@tie @char\the\appendixno.\the\secno.\the\subsecno
+  \else
+    \putwordSection@tie
+      @char\the\appendixno.\the\secno.\the\subsecno.\the\subsubsecno
+  \fi\fi\fi
+}
+
+% \refx{NAME} - reference a cross-reference string named NAME.
+\def\refx#1{%
+  \requireauxfile
+  {%
+    \indexnofonts
+    \turnoffactive
+    \def\value##1{##1}%
+    \expandafter\global\expandafter\let\expandafter\thisrefX
+      \csname XR#1\endcsname
+  }%
+  \ifx\thisrefX\relax
+    % If not defined, say something at least.
+    \angleleft un\-de\-fined\angleright
+    \iflinks
+      \ifhavexrefs
+        {\toks0 = {#1}% avoid expansion of possibly-complex value
+         \message{\linenumber Undefined cross reference `\the\toks0'.}}%
+      \else
+        \ifwarnedxrefs\else
+          \global\warnedxrefstrue
+          \message{Cross reference values unknown; you must run TeX again.}%
+        \fi
+      \fi
+    \fi
+  \else
+    % It's defined, so just use it.
+    \thisrefX
+  \fi
+}
+
+% This is the macro invoked by entries in the aux file.  Define a control
+% sequence for a cross-reference target (we prepend XR to the control sequence
+% name to avoid collisions).  The value is the page number.  If this is a float
+% type, we have more work to do.
+%
+\def\xrdef#1#2{%
+  {% Expand the node or anchor name to remove control sequences.
+   % \turnoffactive stops 8-bit characters being changed to commands
+   % like @'e.  \refx does the same to retrieve the value in the definition.
+    \indexnofonts
+    \turnoffactive
+    \def\value##1{##1}%
+    \xdef\safexrefname{#1}%
+  }%
+  %
+  \bgroup
+    \expandafter\gdef\csname XR\safexrefname\endcsname{#2}%
+  \egroup
+  % We put the \gdef inside a group to avoid the definitions building up on
+  % TeX's save stack, which can cause it to run out of space for aux files with
+  % thousands of lines.  \gdef doesn't use the save stack, but \csname does
+  % when it defines an unknown control sequence as \relax.
+  %
+  % Was that xref control sequence that we just defined for a float?
+  \expandafter\iffloat\csname XR\safexrefname\endcsname
+    % it was a float, and we have the (safe) float type in \iffloattype.
+    \expandafter\let\expandafter\floatlist
+      \csname floatlist\iffloattype\endcsname
+    %
+    % Is this the first time we've seen this float type?
+    \expandafter\ifx\floatlist\relax
+      \toks0 = {\do}% yes, so just \do
+    \else
+      % had it before, so preserve previous elements in list.
+      \toks0 = \expandafter{\floatlist\do}%
+    \fi
+    %
+    % Remember this xref in the control sequence \floatlistFLOATTYPE,
+    % for later use in \listoffloats.
+    \expandafter\xdef\csname floatlist\iffloattype\endcsname{\the\toks0
+      {\safexrefname}}%
+  \fi
+}
+
+% If working on a large document in chapters, it is convenient to
+% be able to disable indexing, cross-referencing, and contents, for test runs.
+% This is done with @novalidate at the beginning of the file.
+%
+\newif\iflinks \linkstrue % by default we want the aux files.
+\let\novalidate = \linksfalse
+
+% Used when writing to the aux file, or when using data from it.
+\def\requireauxfile{%
+  \iflinks
+    \tryauxfile
+    % Open the new aux file.  TeX will close it automatically at exit.
+    \immediate\openout\auxfile=\jobname.aux
+  \fi
+  \global\let\requireauxfile=\relax   % Only do this once.
+}
+
+% Read the last existing aux file, if any.  No error if none exists.
+%
+\def\tryauxfile{%
+  \openin 1 \jobname.aux
+  \ifeof 1 \else
+    \readdatafile{aux}%
+    \global\havexrefstrue
+  \fi
+  \closein 1
+}
+
+\def\setupdatafile{%
+  \catcode`\^^@=\other
+  \catcode`\^^A=\other
+  \catcode`\^^B=\other
+  \catcode`\^^C=\other
+  \catcode`\^^D=\other
+  \catcode`\^^E=\other
+  \catcode`\^^F=\other
+  \catcode`\^^G=\other
+  \catcode`\^^H=\other
+  \catcode`\^^K=\other
+  \catcode`\^^L=\other
+  \catcode`\^^N=\other
+  \catcode`\^^P=\other
+  \catcode`\^^Q=\other
+  \catcode`\^^R=\other
+  \catcode`\^^S=\other
+  \catcode`\^^T=\other
+  \catcode`\^^U=\other
+  \catcode`\^^V=\other
+  \catcode`\^^W=\other
+  \catcode`\^^X=\other
+  \catcode`\^^Z=\other
+  \catcode`\^^[=\other
+  \catcode`\^^\=\other
+  \catcode`\^^]=\other
+  \catcode`\^^^=\other
+  \catcode`\^^_=\other
+  \catcode`\^=\other
+  %
+  % Special characters.  Should be turned off anyway, but...
+  \catcode`\~=\other
+  \catcode`\[=\other
+  \catcode`\]=\other
+  \catcode`\"=\other
+  \catcode`\_=\active
+  \catcode`\|=\active
+  \catcode`\<=\active
+  \catcode`\>=\active
+  \catcode`\$=\other
+  \catcode`\#=\other
+  \catcode`\&=\other
+  \catcode`\%=\other
+  \catcode`+=\other % avoid \+ for paranoia even though we've turned it off
+  %
+  \catcode`\\=\active
+  %
+  % @ is our escape character in .aux files, and we need braces.
+  \catcode`\{=1
+  \catcode`\}=2
+  \catcode`\@=0
+}
+
+\def\readdatafile#1{%
+\begingroup
+  \setupdatafile
+  \input\jobname.#1
+\endgroup}
+
+
+\message{insertions,}
+% including footnotes.
+
+\newcount \footnoteno
+
+% The trailing space in the following definition for supereject is
+% vital for proper filling; pages come out unaligned when you do a
+% pagealignmacro call if that space before the closing brace is
+% removed. (Generally, numeric constants should always be followed by a
+% space to prevent strange expansion errors.)
+\def\supereject{\par\penalty -20000\footnoteno =0 }
+
+% @footnotestyle is meaningful for Info output only.
+\let\footnotestyle=\comment
+
+{\catcode `\@=11
+%
+% Auto-number footnotes.  Otherwise like plain.
+\gdef\footnote{%
+  \global\advance\footnoteno by \@ne
+  \edef\thisfootno{$^{\the\footnoteno}$}%
+  %
+  % In case the footnote comes at the end of a sentence, preserve the
+  % extra spacing after we do the footnote number.
+  \let\@sf\empty
+  \ifhmode\edef\@sf{\spacefactor\the\spacefactor}\ptexslash\fi
+  %
+  % Remove inadvertent blank space before typesetting the footnote number.
+  \unskip
+  \thisfootno\@sf
+  \dofootnote
+}%
+
+% Don't bother with the trickery in plain.tex to not require the
+% footnote text as a parameter.  Our footnotes don't need to be so general.
+%
+% Oh yes, they do; otherwise, @ifset (and anything else that uses
+% \parseargline) fails inside footnotes because the tokens are fixed when
+% the footnote is read.  --karl, 16nov96.
+%
+\gdef\dofootnote{%
+  \insert\footins\bgroup
+  %
+  % Nested footnotes are not supported in TeX, that would take a lot
+  % more work.  (\startsavinginserts does not suffice.)
+  \let\footnote=\errfootnotenest
+  %
+  % We want to typeset this text as a normal paragraph, even if the
+  % footnote reference occurs in (for example) a display environment.
+  % So reset some parameters.
+  \hsize=\txipagewidth
+  \interlinepenalty\interfootnotelinepenalty
+  \splittopskip\ht\strutbox % top baseline for broken footnotes
+  \splitmaxdepth\dp\strutbox
+  \floatingpenalty\@MM
+  \leftskip\z@skip
+  \rightskip\z@skip
+  \spaceskip\z@skip
+  \xspaceskip\z@skip
+  \parindent\defaultparindent
+  %
+  \smallfonts \rm
+  %
+  % Because we use hanging indentation in footnotes, a @noindent appears
+  % to exdent this text, so make it be a no-op.  makeinfo does not use
+  % hanging indentation so @noindent can still be needed within footnote
+  % text after an @example or the like (not that this is good style).
+  \let\noindent = \relax
+  %
+  % Hang the footnote text off the number.  Use \everypar in case the
+  % footnote extends for more than one paragraph.
+  \everypar = {\hang}%
+  \textindent{\thisfootno}%
+  %
+  % Don't crash into the line above the footnote text.  Since this
+  % expands into a box, it must come within the paragraph, lest it
+  % provide a place where TeX can split the footnote.
+  \footstrut
+  %
+  % Invoke rest of plain TeX footnote routine.
+  \futurelet\next\fo@t
+}
+}%end \catcode `\@=11
+
+\def\errfootnotenest{%
+  \errhelp=\EMsimple
+  \errmessage{Nested footnotes not supported in texinfo.tex,
+    even though they work in makeinfo; sorry}
+}
+
+\def\errfootnoteheading{%
+  \errhelp=\EMsimple
+  \errmessage{Footnotes in chapters, sections, etc., are not supported}
+}
+
+% In case a @footnote appears in a vbox, save the footnote text and create
+% the real \insert just after the vbox finished.  Otherwise, the insertion
+% would be lost.
+% Similarly, if a @footnote appears inside an alignment, save the footnote
+% text to a box and make the \insert when a row of the table is finished.
+% And the same can be done for other insert classes.  --kasal, 16nov03.
+%
+% Replace the \insert primitive by a cheating macro.
+% Deeper inside, just make sure that the saved insertions are not spilled
+% out prematurely.
+%
+\def\startsavinginserts{%
+  \ifx \insert\ptexinsert
+    \let\insert\saveinsert
+  \else
+    \let\checkinserts\relax
+  \fi
+}
+
+% This \insert replacement works for both \insert\footins{foo} and
+% \insert\footins\bgroup foo\egroup, but it doesn't work for \insert27{foo}.
+%
+\def\saveinsert#1{%
+  \edef\next{\noexpand\savetobox \makeSAVEname#1}%
+  \afterassignment\next
+  % swallow the left brace
+  \let\temp =
+}
+\def\makeSAVEname#1{\makecsname{SAVE\expandafter\gobble\string#1}}
+\def\savetobox#1{\global\setbox#1 = \vbox\bgroup \unvbox#1}
+
+\def\checksaveins#1{\ifvoid#1\else \placesaveins#1\fi}
+
+\def\placesaveins#1{%
+  \ptexinsert \csname\expandafter\gobblesave\string#1\endcsname
+    {\box#1}%
+}
+
+% eat @SAVE -- beware, all of them have catcode \other:
+{
+  \def\dospecials{\do S\do A\do V\do E} \uncatcodespecials  %  ;-)
+  \gdef\gobblesave @SAVE{}
+}
+
+% initialization:
+\def\newsaveins #1{%
+  \edef\next{\noexpand\newsaveinsX \makeSAVEname#1}%
+  \next
+}
+\def\newsaveinsX #1{%
+  \csname newbox\endcsname #1%
+  \expandafter\def\expandafter\checkinserts\expandafter{\checkinserts
+    \checksaveins #1}%
+}
+
+% initialize:
+\let\checkinserts\empty
+\newsaveins\footins
+\newsaveins\margin
+
+
+% @image.  We use the macros from epsf.tex to support this.
+% If epsf.tex is not installed and @image is used, we complain.
+%
+% Check for and read epsf.tex up front.  If we read it only at @image
+% time, we might be inside a group, and then its definitions would get
+% undone and the next image would fail.
+\openin 1 = epsf.tex
+\ifeof 1 \else
+  % Do not bother showing banner with epsf.tex v2.7k (available in
+  % doc/epsf.tex and on ctan).
+  \def\epsfannounce{\toks0 = }%
+  \input epsf.tex
+\fi
+\closein 1
+%
+% We will only complain once about lack of epsf.tex.
+\newif\ifwarnednoepsf
+\newhelp\noepsfhelp{epsf.tex must be installed for images to
+  work.  It is also included in the Texinfo distribution, or you can get
+  it from https://ctan.org/texarchive/macros/texinfo/texinfo/doc/epsf.tex.}
+%
+\def\image#1{%
+  \ifx\epsfbox\thisisundefined
+    \ifwarnednoepsf \else
+      \errhelp = \noepsfhelp
+      \errmessage{epsf.tex not found, images will be ignored}%
+      \global\warnednoepsftrue
+    \fi
+  \else
+    \imagexxx #1,,,,,\finish
+  \fi
+}
+%
+% Arguments to @image:
+% #1 is (mandatory) image filename; we tack on .eps extension.
+% #2 is (optional) width, #3 is (optional) height.
+% #4 is (ignored optional) html alt text.
+% #5 is (ignored optional) extension.
+% #6 is just the usual extra ignored arg for parsing stuff.
+\newif\ifimagevmode
+\def\imagexxx#1,#2,#3,#4,#5,#6\finish{\begingroup
+  \catcode`\^^M = 5     % in case we're inside an example
+  \normalturnoffactive  % allow _ et al. in names
+  \makevalueexpandable
+  % If the image is by itself, center it.
+  \ifvmode
+    \imagevmodetrue
+  \else \ifx\centersub\centerV
+    % for @center @image, we need a vbox so we can have our vertical space
+    \imagevmodetrue
+    \vbox\bgroup % vbox has better behavior than vtop herev
+  \fi\fi
+  %
+  \ifimagevmode
+    \nobreak\medskip
+    % Usually we'll have text after the image which will insert
+    % \parskip glue, so insert it here too to equalize the space
+    % above and below.
+    \nobreak\vskip\parskip
+    \nobreak
+  \fi
+  %
+  % Leave vertical mode so that indentation from an enclosing
+  %  environment such as @quotation is respected.
+  % However, if we're at the top level, we don't want the
+  %  normal paragraph indentation.
+  % On the other hand, if we are in the case of @center @image, we don't
+  %  want to start a paragraph, which will create a hsize-width box and
+  %  eradicate the centering.
+  \ifx\centersub\centerV \else \imageindent \fi
+  %
+  % Output the image.
+  \ifpdf
+    % For pdfTeX and LuaTeX <= 0.80
+    \dopdfimage{#1}{#2}{#3}%
+  \else
+    \ifx\XeTeXrevision\thisisundefined
+      % For epsf.tex
+      % \epsfbox itself resets \epsf?size at each figure.
+      \setbox0 = \hbox{\ignorespaces #2}%
+        \ifdim\wd0 > 0pt \epsfxsize=#2\relax \fi
+      \setbox0 = \hbox{\ignorespaces #3}%
+        \ifdim\wd0 > 0pt \epsfysize=#3\relax \fi
+      \epsfbox{#1.eps}%
+    \else
+      % For XeTeX
+      \doxeteximage{#1}{#2}{#3}%
+    \fi
+  \fi
+  %
+  \ifimagevmode
+    \medskip  % space after a standalone image
+  \fi
+  \ifx\centersub\centerV \egroup \fi
+\endgroup}
+
+
+% @float FLOATTYPE,LABEL,LOC ... @end float for displayed figures, tables,
+% etc.  We don't actually implement floating yet, we always include the
+% float "here".  But it seemed the best name for the future.
+%
+\envparseargdef\float{\eatcommaspace\eatcommaspace\dofloat#1, , ,\finish}
+
+% There may be a space before second and/or third parameter; delete it.
+\def\eatcommaspace#1, {#1,}
+
+% #1 is the optional FLOATTYPE, the text label for this float, typically
+% "Figure", "Table", "Example", etc.  Can't contain commas.  If omitted,
+% this float will not be numbered and cannot be referred to.
+%
+% #2 is the optional xref label.  Also must be present for the float to
+% be referable.
+%
+% #3 is the optional positioning argument; for now, it is ignored.  It
+% will somehow specify the positions allowed to float to (here, top, bottom).
+%
+% We keep a separate counter for each FLOATTYPE, which we reset at each
+% chapter-level command.
+\let\resetallfloatnos=\empty
+%
+\def\dofloat#1,#2,#3,#4\finish{%
+  \let\thiscaption=\empty
+  \let\thisshortcaption=\empty
+  %
+  % don't lose footnotes inside @float.
+  %
+  % BEWARE: when the floats start float, we have to issue warning whenever an
+  % insert appears inside a float which could possibly float. --kasal, 26may04
+  %
+  \startsavinginserts
+  %
+  % We can't be used inside a paragraph.
+  \par
+  %
+  \vtop\bgroup
+    \def\floattype{#1}%
+    \def\floatlabel{#2}%
+    \def\floatloc{#3}% we do nothing with this yet.
+    %
+    \ifx\floattype\empty
+      \let\safefloattype=\empty
+    \else
+      {%
+        % the floattype might have accents or other special characters,
+        % but we need to use it in a control sequence name.
+        \indexnofonts
+        \turnoffactive
+        \xdef\safefloattype{\floattype}%
+      }%
+    \fi
+    %
+    % If label is given but no type, we handle that as the empty type.
+    \ifx\floatlabel\empty \else
+      % We want each FLOATTYPE to be numbered separately (Figure 1,
+      % Table 1, Figure 2, ...).  (And if no label, no number.)
+      %
+      \expandafter\getfloatno\csname\safefloattype floatno\endcsname
+      \global\advance\floatno by 1
+      %
+      {%
+        % This magic value for \currentsection is output by \setref as the
+        % XREFLABEL-title value.  \xrefX uses it to distinguish float
+        % labels (which have a completely different output format) from
+        % node and anchor labels.  And \xrdef uses it to construct the
+        % lists of floats.
+        %
+        \edef\currentsection{\floatmagic=\safefloattype}%
+        \setref{\floatlabel}{Yfloat}%
+      }%
+    \fi
+    %
+    % start with \parskip glue, I guess.
+    \vskip\parskip
+    %
+    % Don't suppress indentation if a float happens to start a section.
+    \restorefirstparagraphindent
+}
+
+% we have these possibilities:
+% @float Foo,lbl & @caption{Cap}: Foo 1.1: Cap
+% @float Foo,lbl & no caption:    Foo 1.1
+% @float Foo & @caption{Cap}:     Foo: Cap
+% @float Foo & no caption:        Foo
+% @float ,lbl & Caption{Cap}:     1.1: Cap
+% @float ,lbl & no caption:       1.1
+% @float & @caption{Cap}:         Cap
+% @float & no caption:
+%
+\def\Efloat{%
+    \let\floatident = \empty
+    %
+    % In all cases, if we have a float type, it comes first.
+    \ifx\floattype\empty \else \def\floatident{\floattype}\fi
+    %
+    % If we have an xref label, the number comes next.
+    \ifx\floatlabel\empty \else
+      \ifx\floattype\empty \else % if also had float type, need tie first.
+        \appendtomacro\floatident{\tie}%
+      \fi
+      % the number.
+      \appendtomacro\floatident{\chaplevelprefix\the\floatno}%
+    \fi
+    %
+    % Start the printed caption with what we've constructed in
+    % \floatident, but keep it separate; we need \floatident again.
+    \let\captionline = \floatident
+    %
+    \ifx\thiscaption\empty \else
+      \ifx\floatident\empty \else
+        \appendtomacro\captionline{: }% had ident, so need a colon between
+      \fi
+      %
+      % caption text.
+      \appendtomacro\captionline{\scanexp\thiscaption}%
+    \fi
+    %
+    % If we have anything to print, print it, with space before.
+    % Eventually this needs to become an \insert.
+    \ifx\captionline\empty \else
+      \vskip.5\parskip
+      \captionline
+      %
+      % Space below caption.
+      \vskip\parskip
+    \fi
+    %
+    % If have an xref label, write the list of floats info.  Do this
+    % after the caption, to avoid chance of it being a breakpoint.
+    \ifx\floatlabel\empty \else
+      % Write the text that goes in the lof to the aux file as
+      % \floatlabel-lof.  Besides \floatident, we include the short
+      % caption if specified, else the full caption if specified, else nothing.
+      {%
+        \requireauxfile
+        \atdummies
+        %
+        \ifx\thisshortcaption\empty
+          \def\gtemp{\thiscaption}%
+        \else
+          \def\gtemp{\thisshortcaption}%
+        \fi
+        \immediate\write\auxfile{@xrdef{\floatlabel-lof}{\floatident
+          \ifx\gtemp\empty \else : \gtemp \fi}}%
+      }%
+    \fi
+  \egroup  % end of \vtop
+  %
+  \checkinserts
+}
+
+% Append the tokens #2 to the definition of macro #1, not expanding either.
+%
+\def\appendtomacro#1#2{%
+  \expandafter\def\expandafter#1\expandafter{#1#2}%
+}
+
+% @caption, @shortcaption
+%
+\def\caption{\docaption\thiscaption}
+\def\shortcaption{\docaption\thisshortcaption}
+\def\docaption{\checkenv\float \bgroup\scanargctxt\defcaption}
+\def\defcaption#1#2{\egroup \def#1{#2}}
+
+% The parameter is the control sequence identifying the counter we are
+% going to use.  Create it if it doesn't exist and assign it to \floatno.
+\def\getfloatno#1{%
+  \ifx#1\relax
+      % Haven't seen this figure type before.
+      \csname newcount\endcsname #1%
+      %
+      % Remember to reset this floatno at the next chap.
+      \expandafter\gdef\expandafter\resetallfloatnos
+        \expandafter{\resetallfloatnos #1=0 }%
+  \fi
+  \let\floatno#1%
+}
+
+% \setref calls this to get the XREFLABEL-snt value.  We want an @xref
+% to the FLOATLABEL to expand to "Figure 3.1".  We call \setref when we
+% first read the @float command.
+%
+\def\Yfloat{\floattype@tie \chaplevelprefix\the\floatno}%
+
+% Magic string used for the XREFLABEL-title value, so \xrefX can
+% distinguish floats from other xref types.
+\def\floatmagic{!!float!!}
+
+% #1 is the control sequence we are passed; we expand into a conditional
+% which is true if #1 represents a float ref.  That is, the magic
+% \currentsection value which we \setref above.
+%
+\def\iffloat#1{\expandafter\doiffloat#1==\finish}
+%
+% #1 is (maybe) the \floatmagic string.  If so, #2 will be the
+% (safe) float type for this float.  We set \iffloattype to #2.
+%
+\def\doiffloat#1=#2=#3\finish{%
+  \def\temp{#1}%
+  \def\iffloattype{#2}%
+  \ifx\temp\floatmagic
+}
+
+% @listoffloats FLOATTYPE - print a list of floats like a table of contents.
+%
+\parseargdef\listoffloats{%
+  \def\floattype{#1}% floattype
+  {%
+    % the floattype might have accents or other special characters,
+    % but we need to use it in a control sequence name.
+    \indexnofonts
+    \turnoffactive
+    \xdef\safefloattype{\floattype}%
+  }%
+  %
+  % \xrdef saves the floats as a \do-list in \floatlistSAFEFLOATTYPE.
+  \expandafter\ifx\csname floatlist\safefloattype\endcsname \relax
+    \ifhavexrefs
+      % if the user said @listoffloats foo but never @float foo.
+      \message{\linenumber No `\safefloattype' floats to list.}%
+    \fi
+  \else
+    \begingroup
+      \leftskip=\tocindent  % indent these entries like a toc
+      \let\do=\listoffloatsdo
+      \csname floatlist\safefloattype\endcsname
+    \endgroup
+  \fi
+}
+
+% This is called on each entry in a list of floats.  We're passed the
+% xref label, in the form LABEL-title, which is how we save it in the
+% aux file.  We strip off the -title and look up \XRLABEL-lof, which
+% has the text we're supposed to typeset here.
+%
+% Figures without xref labels will not be included in the list (since
+% they won't appear in the aux file).
+%
+\def\listoffloatsdo#1{\listoffloatsdoentry#1\finish}
+\def\listoffloatsdoentry#1-title\finish{{%
+  % Can't fully expand XR#1-lof because it can contain anything.  Just
+  % pass the control sequence.  On the other hand, XR#1-pg is just the
+  % page number, and we want to fully expand that so we can get a link
+  % in pdf output.
+  \toksA = \expandafter{\csname XR#1-lof\endcsname}%
+  %
+  % use the same \entry macro we use to generate the TOC and index.
+  \edef\writeentry{\noexpand\entry{\the\toksA}{\csname XR#1-pg\endcsname}}%
+  \writeentry
+}}
+
+
+\message{localization,}
+
+% For single-language documents, @documentlanguage is usually given very
+% early, just after @documentencoding.  Single argument is the language
+% (de) or locale (de_DE) abbreviation.
+%
+{
+  \catcode`\_ = \active
+  \globaldefs=1
+\parseargdef\documentlanguage{%
+  \tex % read txi-??.tex file in plain TeX.
+    % Read the file by the name they passed if it exists.
+    \let_ = \normalunderscore  % normal _ character for filename test
+    \openin 1 txi-#1.tex
+    \ifeof 1
+      \documentlanguagetrywithoutunderscore #1_\finish
+    \else
+      \globaldefs = 1  % everything in the txi-LL files needs to persist
+      \input txi-#1.tex
+    \fi
+    \closein 1
+  \endgroup % end raw TeX
+}
+%
+% If they passed de_DE, and txi-de_DE.tex doesn't exist,
+% try txi-de.tex.
+%
+\gdef\documentlanguagetrywithoutunderscore#1_#2\finish{%
+  \openin 1 txi-#1.tex
+  \ifeof 1
+    \errhelp = \nolanghelp
+    \errmessage{Cannot read language file txi-#1.tex}%
+  \else
+    \globaldefs = 1  % everything in the txi-LL files needs to persist
+    \input txi-#1.tex
+  \fi
+  \closein 1
+}
+}% end of special _ catcode
+%
+\newhelp\nolanghelp{The given language definition file cannot be found or
+is empty.  Maybe you need to install it?  Putting it in the current
+directory should work if nowhere else does.}
+
+% This macro is called from txi-??.tex files; the first argument is the
+% \language name to set (without the "\lang@" prefix), the second and
+% third args are \{left,right}hyphenmin.
+%
+% The language names to pass are determined when the format is built.
+% See the etex.log file created at that time, e.g.,
+% /usr/local/texlive/2008/texmf-var/web2c/pdftex/etex.log.
+%
+% With TeX Live 2008, etex now includes hyphenation patterns for all
+% available languages.  This means we can support hyphenation in
+% Texinfo, at least to some extent.  (This still doesn't solve the
+% accented characters problem.)
+%
+\catcode`@=11
+\def\txisetlanguage#1#2#3{%
+  % do not set the language if the name is undefined in the current TeX.
+  \expandafter\ifx\csname lang@#1\endcsname \relax
+    \message{no patterns for #1}%
+  \else
+    \global\language = \csname lang@#1\endcsname
+  \fi
+  % but there is no harm in adjusting the hyphenmin values regardless.
+  \global\lefthyphenmin = #2\relax
+  \global\righthyphenmin = #3\relax
+}
+
+% XeTeX and LuaTeX can handle Unicode natively.
+% Their default I/O uses UTF-8 sequences instead of a byte-wise operation.
+% Other TeX engines' I/O (pdfTeX, etc.) is byte-wise.
+%
+\newif\iftxinativeunicodecapable
+\newif\iftxiusebytewiseio
+
+\ifx\XeTeXrevision\thisisundefined
+  \ifx\luatexversion\thisisundefined
+    \txinativeunicodecapablefalse
+    \txiusebytewiseiotrue
+  \else
+    \txinativeunicodecapabletrue
+    \txiusebytewiseiofalse
+  \fi
+\else
+  \txinativeunicodecapabletrue
+  \txiusebytewiseiofalse
+\fi
+
+% Set I/O by bytes instead of UTF-8 sequence for XeTeX and LuaTex
+% for non-UTF-8 (byte-wise) encodings.
+%
+\def\setbytewiseio{%
+  \ifx\XeTeXrevision\thisisundefined
+  \else
+    \XeTeXdefaultencoding "bytes"  % For subsequent files to be read
+    \XeTeXinputencoding "bytes"  % For document root file
+    % Unfortunately, there seems to be no corresponding XeTeX command for
+    % output encoding.  This is a problem for auxiliary index and TOC files.
+    % The only solution would be perhaps to write out @U{...} sequences in
+    % place of non-ASCII characters.
+  \fi
+
+  \ifx\luatexversion\thisisundefined
+  \else
+    \directlua{
+    local utf8_char, byte, gsub = unicode.utf8.char, string.byte, string.gsub
+    local function convert_char (char)
+      return utf8_char(byte(char))
+    end
+
+    local function convert_line (line)
+      return gsub(line, ".", convert_char)
+    end
+
+    callback.register("process_input_buffer", convert_line)
+
+    local function convert_line_out (line)
+      local line_out = ""
+      for c in string.utfvalues(line) do
+         line_out = line_out .. string.char(c)
+      end
+      return line_out
+    end
+
+    callback.register("process_output_buffer", convert_line_out)
+    }
+  \fi
+
+  \txiusebytewiseiotrue
+}
+
+
+% Helpers for encodings.
+% Set the catcode of characters 128 through 255 to the specified number.
+%
+\def\setnonasciicharscatcode#1{%
+   \count255=128
+   \loop\ifnum\count255<256
+      \global\catcode\count255=#1\relax
+      \advance\count255 by 1
+   \repeat
+}
+
+\def\setnonasciicharscatcodenonglobal#1{%
+   \count255=128
+   \loop\ifnum\count255<256
+      \catcode\count255=#1\relax
+      \advance\count255 by 1
+   \repeat
+}
+
+% @documentencoding sets the definition of non-ASCII characters
+% according to the specified encoding.
+%
+\def\documentencoding{\parseargusing\filenamecatcodes\documentencodingzzz}
+\def\documentencodingzzz#1{%
+  %
+  % Encoding being declared for the document.
+  \def\declaredencoding{\csname #1.enc\endcsname}%
+  %
+  % Supported encodings: names converted to tokens in order to be able
+  % to compare them with \ifx.
+  \def\ascii{\csname US-ASCII.enc\endcsname}%
+  \def\latnine{\csname ISO-8859-15.enc\endcsname}%
+  \def\latone{\csname ISO-8859-1.enc\endcsname}%
+  \def\lattwo{\csname ISO-8859-2.enc\endcsname}%
+  \def\utfeight{\csname UTF-8.enc\endcsname}%
+  %
+  \ifx \declaredencoding \ascii
+     \asciichardefs
+  %
+  \else \ifx \declaredencoding \lattwo
+     \iftxinativeunicodecapable
+       \setbytewiseio
+     \fi
+     \setnonasciicharscatcode\active
+     \lattwochardefs
+  %
+  \else \ifx \declaredencoding \latone
+     \iftxinativeunicodecapable
+       \setbytewiseio
+     \fi
+     \setnonasciicharscatcode\active
+     \latonechardefs
+  %
+  \else \ifx \declaredencoding \latnine
+     \iftxinativeunicodecapable
+       \setbytewiseio
+     \fi
+     \setnonasciicharscatcode\active
+     \latninechardefs
+  %
+  \else \ifx \declaredencoding \utfeight
+     \iftxinativeunicodecapable
+       % For native Unicode handling (XeTeX and LuaTeX)
+       \nativeunicodechardefs
+     \else
+       % For treating UTF-8 as byte sequences (TeX, eTeX and pdfTeX)
+       \setnonasciicharscatcode\active
+       % since we already invoked \utfeightchardefs at the top level
+       % (below), do not re-invoke it, otherwise our check for duplicated
+       % definitions gets triggered.  Making non-ascii chars active is
+       % sufficient.
+     \fi
+  %
+  \else
+    \message{Ignoring unknown document encoding: #1.}%
+  %
+  \fi % utfeight
+  \fi % latnine
+  \fi % latone
+  \fi % lattwo
+  \fi % ascii
+  %
+  \ifx\XeTeXrevision\thisisundefined
+  \else
+    \ifx \declaredencoding \utfeight
+    \else
+      \ifx \declaredencoding \ascii
+      \else
+        \message{Warning: XeTeX with non-UTF-8 encodings cannot handle %
+        non-ASCII characters in auxiliary files.}%
+      \fi
+    \fi
+  \fi
+}
+
+% emacs-page
+% A message to be logged when using a character that isn't available
+% the default font encoding (OT1).
+%
+\def\missingcharmsg#1{\message{Character missing, sorry: #1.}}
+
+% Take account of \c (plain) vs. \, (Texinfo) difference.
+\def\cedilla#1{\ifx\c\ptexc\c{#1}\else\,{#1}\fi}
+
+% First, make active non-ASCII characters in order for them to be
+% correctly categorized when TeX reads the replacement text of
+% macros containing the character definitions.
+\setnonasciicharscatcode\active
+%
+
+\def\gdefchar#1#2{%
+\gdef#1{%
+   \ifpassthroughchars
+     \string#1%
+   \else
+     #2%
+   \fi
+}}
+
+% Latin1 (ISO-8859-1) character definitions.
+\def\latonechardefs{%
+  \gdefchar^^a0{\tie}
+  \gdefchar^^a1{\exclamdown}
+  \gdefchar^^a2{{\tcfont \char162}} % cent
+  \gdefchar^^a3{\pounds{}}
+  \gdefchar^^a4{{\tcfont \char164}} % currency
+  \gdefchar^^a5{{\tcfont \char165}} % yen
+  \gdefchar^^a6{{\tcfont \char166}} % broken bar
+  \gdefchar^^a7{\S}
+  \gdefchar^^a8{\"{}}
+  \gdefchar^^a9{\copyright{}}
+  \gdefchar^^aa{\ordf}
+  \gdefchar^^ab{\guillemetleft{}}
+  \gdefchar^^ac{\ensuremath\lnot}
+  \gdefchar^^ad{\-}
+  \gdefchar^^ae{\registeredsymbol{}}
+  \gdefchar^^af{\={}}
+  %
+  \gdefchar^^b0{\textdegree}
+  \gdefchar^^b1{$\pm$}
+  \gdefchar^^b2{$^2$}
+  \gdefchar^^b3{$^3$}
+  \gdefchar^^b4{\'{}}
+  \gdefchar^^b5{$\mu$}
+  \gdefchar^^b6{\P}
+  \gdefchar^^b7{\ensuremath\cdot}
+  \gdefchar^^b8{\cedilla\ }
+  \gdefchar^^b9{$^1$}
+  \gdefchar^^ba{\ordm}
+  \gdefchar^^bb{\guillemetright{}}
+  \gdefchar^^bc{$1\over4$}
+  \gdefchar^^bd{$1\over2$}
+  \gdefchar^^be{$3\over4$}
+  \gdefchar^^bf{\questiondown}
+  %
+  \gdefchar^^c0{\`A}
+  \gdefchar^^c1{\'A}
+  \gdefchar^^c2{\^A}
+  \gdefchar^^c3{\~A}
+  \gdefchar^^c4{\"A}
+  \gdefchar^^c5{\ringaccent A}
+  \gdefchar^^c6{\AE}
+  \gdefchar^^c7{\cedilla C}
+  \gdefchar^^c8{\`E}
+  \gdefchar^^c9{\'E}
+  \gdefchar^^ca{\^E}
+  \gdefchar^^cb{\"E}
+  \gdefchar^^cc{\`I}
+  \gdefchar^^cd{\'I}
+  \gdefchar^^ce{\^I}
+  \gdefchar^^cf{\"I}
+  %
+  \gdefchar^^d0{\DH}
+  \gdefchar^^d1{\~N}
+  \gdefchar^^d2{\`O}
+  \gdefchar^^d3{\'O}
+  \gdefchar^^d4{\^O}
+  \gdefchar^^d5{\~O}
+  \gdefchar^^d6{\"O}
+  \gdefchar^^d7{$\times$}
+  \gdefchar^^d8{\O}
+  \gdefchar^^d9{\`U}
+  \gdefchar^^da{\'U}
+  \gdefchar^^db{\^U}
+  \gdefchar^^dc{\"U}
+  \gdefchar^^dd{\'Y}
+  \gdefchar^^de{\TH}
+  \gdefchar^^df{\ss}
+  %
+  \gdefchar^^e0{\`a}
+  \gdefchar^^e1{\'a}
+  \gdefchar^^e2{\^a}
+  \gdefchar^^e3{\~a}
+  \gdefchar^^e4{\"a}
+  \gdefchar^^e5{\ringaccent a}
+  \gdefchar^^e6{\ae}
+  \gdefchar^^e7{\cedilla c}
+  \gdefchar^^e8{\`e}
+  \gdefchar^^e9{\'e}
+  \gdefchar^^ea{\^e}
+  \gdefchar^^eb{\"e}
+  \gdefchar^^ec{\`{\dotless i}}
+  \gdefchar^^ed{\'{\dotless i}}
+  \gdefchar^^ee{\^{\dotless i}}
+  \gdefchar^^ef{\"{\dotless i}}
+  %
+  \gdefchar^^f0{\dh}
+  \gdefchar^^f1{\~n}
+  \gdefchar^^f2{\`o}
+  \gdefchar^^f3{\'o}
+  \gdefchar^^f4{\^o}
+  \gdefchar^^f5{\~o}
+  \gdefchar^^f6{\"o}
+  \gdefchar^^f7{$\div$}
+  \gdefchar^^f8{\o}
+  \gdefchar^^f9{\`u}
+  \gdefchar^^fa{\'u}
+  \gdefchar^^fb{\^u}
+  \gdefchar^^fc{\"u}
+  \gdefchar^^fd{\'y}
+  \gdefchar^^fe{\th}
+  \gdefchar^^ff{\"y}
+}
+
+% Latin9 (ISO-8859-15) encoding character definitions.
+\def\latninechardefs{%
+  % Encoding is almost identical to Latin1.
+  \latonechardefs
+  %
+  \gdefchar^^a4{\euro{}}
+  \gdefchar^^a6{\v S}
+  \gdefchar^^a8{\v s}
+  \gdefchar^^b4{\v Z}
+  \gdefchar^^b8{\v z}
+  \gdefchar^^bc{\OE}
+  \gdefchar^^bd{\oe}
+  \gdefchar^^be{\"Y}
+}
+
+% Latin2 (ISO-8859-2) character definitions.
+\def\lattwochardefs{%
+  \gdefchar^^a0{\tie}
+  \gdefchar^^a1{\ogonek{A}}
+  \gdefchar^^a2{\u{}}
+  \gdefchar^^a3{\L}
+  \gdefchar^^a4{\missingcharmsg{CURRENCY SIGN}}
+  \gdefchar^^a5{\v L}
+  \gdefchar^^a6{\'S}
+  \gdefchar^^a7{\S}
+  \gdefchar^^a8{\"{}}
+  \gdefchar^^a9{\v S}
+  \gdefchar^^aa{\cedilla S}
+  \gdefchar^^ab{\v T}
+  \gdefchar^^ac{\'Z}
+  \gdefchar^^ad{\-}
+  \gdefchar^^ae{\v Z}
+  \gdefchar^^af{\dotaccent Z}
+  %
+  \gdefchar^^b0{\textdegree{}}
+  \gdefchar^^b1{\ogonek{a}}
+  \gdefchar^^b2{\ogonek{ }}
+  \gdefchar^^b3{\l}
+  \gdefchar^^b4{\'{}}
+  \gdefchar^^b5{\v l}
+  \gdefchar^^b6{\'s}
+  \gdefchar^^b7{\v{}}
+  \gdefchar^^b8{\cedilla\ }
+  \gdefchar^^b9{\v s}
+  \gdefchar^^ba{\cedilla s}
+  \gdefchar^^bb{\v t}
+  \gdefchar^^bc{\'z}
+  \gdefchar^^bd{\H{}}
+  \gdefchar^^be{\v z}
+  \gdefchar^^bf{\dotaccent z}
+  %
+  \gdefchar^^c0{\'R}
+  \gdefchar^^c1{\'A}
+  \gdefchar^^c2{\^A}
+  \gdefchar^^c3{\u A}
+  \gdefchar^^c4{\"A}
+  \gdefchar^^c5{\'L}
+  \gdefchar^^c6{\'C}
+  \gdefchar^^c7{\cedilla C}
+  \gdefchar^^c8{\v C}
+  \gdefchar^^c9{\'E}
+  \gdefchar^^ca{\ogonek{E}}
+  \gdefchar^^cb{\"E}
+  \gdefchar^^cc{\v E}
+  \gdefchar^^cd{\'I}
+  \gdefchar^^ce{\^I}
+  \gdefchar^^cf{\v D}
+  %
+  \gdefchar^^d0{\DH}
+  \gdefchar^^d1{\'N}
+  \gdefchar^^d2{\v N}
+  \gdefchar^^d3{\'O}
+  \gdefchar^^d4{\^O}
+  \gdefchar^^d5{\H O}
+  \gdefchar^^d6{\"O}
+  \gdefchar^^d7{$\times$}
+  \gdefchar^^d8{\v R}
+  \gdefchar^^d9{\ringaccent U}
+  \gdefchar^^da{\'U}
+  \gdefchar^^db{\H U}
+  \gdefchar^^dc{\"U}
+  \gdefchar^^dd{\'Y}
+  \gdefchar^^de{\cedilla T}
+  \gdefchar^^df{\ss}
+  %
+  \gdefchar^^e0{\'r}
+  \gdefchar^^e1{\'a}
+  \gdefchar^^e2{\^a}
+  \gdefchar^^e3{\u a}
+  \gdefchar^^e4{\"a}
+  \gdefchar^^e5{\'l}
+  \gdefchar^^e6{\'c}
+  \gdefchar^^e7{\cedilla c}
+  \gdefchar^^e8{\v c}
+  \gdefchar^^e9{\'e}
+  \gdefchar^^ea{\ogonek{e}}
+  \gdefchar^^eb{\"e}
+  \gdefchar^^ec{\v e}
+  \gdefchar^^ed{\'{\dotless{i}}}
+  \gdefchar^^ee{\^{\dotless{i}}}
+  \gdefchar^^ef{\v d}
+  %
+  \gdefchar^^f0{\dh}
+  \gdefchar^^f1{\'n}
+  \gdefchar^^f2{\v n}
+  \gdefchar^^f3{\'o}
+  \gdefchar^^f4{\^o}
+  \gdefchar^^f5{\H o}
+  \gdefchar^^f6{\"o}
+  \gdefchar^^f7{$\div$}
+  \gdefchar^^f8{\v r}
+  \gdefchar^^f9{\ringaccent u}
+  \gdefchar^^fa{\'u}
+  \gdefchar^^fb{\H u}
+  \gdefchar^^fc{\"u}
+  \gdefchar^^fd{\'y}
+  \gdefchar^^fe{\cedilla t}
+  \gdefchar^^ff{\dotaccent{}}
+}
+
+% UTF-8 character definitions.
+%
+% This code to support UTF-8 is based on LaTeX's utf8.def, with some
+% changes for Texinfo conventions.  It is included here under the GPL by
+% permission from Frank Mittelbach and the LaTeX team.
+%
+\newcount\countUTFx
+\newcount\countUTFy
+\newcount\countUTFz
+
+\gdef\UTFviiiTwoOctets#1#2{\expandafter
+   \UTFviiiDefined\csname u8:#1\string #2\endcsname}
+%
+\gdef\UTFviiiThreeOctets#1#2#3{\expandafter
+   \UTFviiiDefined\csname u8:#1\string #2\string #3\endcsname}
+%
+\gdef\UTFviiiFourOctets#1#2#3#4{\expandafter
+   \UTFviiiDefined\csname u8:#1\string #2\string #3\string #4\endcsname}
+
+\gdef\UTFviiiDefined#1{%
+  \ifx #1\relax
+    \message{\linenumber Unicode char \string #1 not defined for Texinfo}%
+  \else
+    \expandafter #1%
+  \fi
+}
+
+% Give non-ASCII bytes the active definitions for processing UTF-8 sequences
+\begingroup
+  \catcode`\~13
+  \catcode`\$12
+  \catcode`\"12
+
+  % Loop from \countUTFx to \countUTFy, performing \UTFviiiTmp
+  % substituting ~ and $ with a character token of that value.
+  \def\UTFviiiLoop{%
+    \global\catcode\countUTFx\active
+    \uccode`\~\countUTFx
+    \uccode`\$\countUTFx
+    \uppercase\expandafter{\UTFviiiTmp}%
+    \advance\countUTFx by 1
+    \ifnum\countUTFx < \countUTFy
+      \expandafter\UTFviiiLoop
+    \fi}
+
+  % For bytes other than the first in a UTF-8 sequence.  Not expected to
+  % be expanded except when writing to auxiliary files.
+  \countUTFx = "80
+  \countUTFy = "C2
+  \def\UTFviiiTmp{%
+    \gdef~{%
+        \ifpassthroughchars $\fi}}%
+  \UTFviiiLoop
+
+  \countUTFx = "C2
+  \countUTFy = "E0
+  \def\UTFviiiTmp{%
+    \gdef~{%
+        \ifpassthroughchars $%
+        \else\expandafter\UTFviiiTwoOctets\expandafter$\fi}}%
+  \UTFviiiLoop
+
+  \countUTFx = "E0
+  \countUTFy = "F0
+  \def\UTFviiiTmp{%
+    \gdef~{%
+        \ifpassthroughchars $%
+        \else\expandafter\UTFviiiThreeOctets\expandafter$\fi}}%
+  \UTFviiiLoop
+
+  \countUTFx = "F0
+  \countUTFy = "F4
+  \def\UTFviiiTmp{%
+    \gdef~{%
+        \ifpassthroughchars $%
+        \else\expandafter\UTFviiiFourOctets\expandafter$\fi
+        }}%
+  \UTFviiiLoop
+\endgroup
+
+\def\globallet{\global\let} % save some \expandafter's below
+
+% @U{xxxx} to produce U+xxxx, if we support it.
+\def\U#1{%
+  \expandafter\ifx\csname uni:#1\endcsname \relax
+    \iftxinativeunicodecapable
+      % All Unicode characters can be used if native Unicode handling is
+      % active.  However, if the font does not have the glyph,
+      % letters are missing.
+      \begingroup
+        \uccode`\.="#1\relax
+        \uppercase{.}
+      \endgroup
+    \else
+      \errhelp = \EMsimple
+      \errmessage{Unicode character U+#1 not supported, sorry}%
+    \fi
+  \else
+    \csname uni:#1\endcsname
+  \fi
+}
+
+% These macros are used here to construct the name of a control
+% sequence to be defined.
+\def\UTFviiiTwoOctetsName#1#2{%
+  \csname u8:#1\string #2\endcsname}%
+\def\UTFviiiThreeOctetsName#1#2#3{%
+  \csname u8:#1\string #2\string #3\endcsname}%
+\def\UTFviiiFourOctetsName#1#2#3#4{%
+  \csname u8:#1\string #2\string #3\string #4\endcsname}%
+
+% For UTF-8 byte sequences (TeX, e-TeX and pdfTeX),
+% provide a definition macro to replace a Unicode character;
+% this gets used by the @U command
+%
+\begingroup
+  \catcode`\"=12
+  \catcode`\<=12
+  \catcode`\.=12
+  \catcode`\,=12
+  \catcode`\;=12
+  \catcode`\!=12
+  \catcode`\~=13
+  \gdef\DeclareUnicodeCharacterUTFviii#1#2{%
+    \countUTFz = "#1\relax
+    \begingroup
+      \parseXMLCharref
+
+      % Give \u8:... its definition.  The sequence of seven \expandafter's
+      % expands after the \gdef three times, e.g.
+      %
+      % 1.  \UTFviiTwoOctetsName B1 B2
+      % 2.  \csname u8:B1 \string B2 \endcsname
+      % 3.  \u8: B1 B2  (a single control sequence token)
+      %
+      \expandafter\expandafter
+      \expandafter\expandafter
+      \expandafter\expandafter
+      \expandafter\gdef       \UTFviiiTmp{#2}%
+      %
+      \expandafter\ifx\csname uni:#1\endcsname \relax \else
+       \message{Internal error, already defined: #1}%
+      \fi
+      %
+      % define an additional control sequence for this code point.
+      \expandafter\globallet\csname uni:#1\endcsname \UTFviiiTmp
+    \endgroup}
+  %
+  % Given the value in \countUTFz as a Unicode code point, set \UTFviiiTmp
+  % to the corresponding UTF-8 sequence.
+  \gdef\parseXMLCharref{%
+    \ifnum\countUTFz < "A0\relax
+      \errhelp = \EMsimple
+      \errmessage{Cannot define Unicode char value < 00A0}%
+    \else\ifnum\countUTFz < "800\relax
+      \parseUTFviiiA,%
+      \parseUTFviiiB C\UTFviiiTwoOctetsName.,%
+    \else\ifnum\countUTFz < "10000\relax
+      \parseUTFviiiA;%
+      \parseUTFviiiA,%
+      \parseUTFviiiB E\UTFviiiThreeOctetsName.{,;}%
+    \else
+      \parseUTFviiiA;%
+      \parseUTFviiiA,%
+      \parseUTFviiiA!%
+      \parseUTFviiiB F\UTFviiiFourOctetsName.{!,;}%
+    \fi\fi\fi
+  }
+
+  % Extract a byte from the end of the UTF-8 representation of \countUTFx.
+  % It must be a non-initial byte in the sequence.
+  % Change \uccode of #1 for it to be used in \parseUTFviiiB as one
+  % of the bytes.
+  \gdef\parseUTFviiiA#1{%
+    \countUTFx = \countUTFz
+    \divide\countUTFz by 64
+    \countUTFy = \countUTFz  % Save to be the future value of \countUTFz.
+    \multiply\countUTFz by 64
+
+    % \countUTFz is now \countUTFx with the last 5 bits cleared.  Subtract
+    % in order to get the last five bits.
+    \advance\countUTFx by -\countUTFz
+
+    % Convert this to the byte in the UTF-8 sequence.
+    \advance\countUTFx by 128
+    \uccode `#1\countUTFx
+    \countUTFz = \countUTFy}
+
+  % Used to put a UTF-8 byte sequence into \UTFviiiTmp
+  % #1 is the increment for \countUTFz to yield a the first byte of the UTF-8
+  %    sequence.
+  % #2 is one of the \UTFviii*OctetsName macros.
+  % #3 is always a full stop (.)
+  % #4 is a template for the other bytes in the sequence.  The values for these
+  %    bytes is substituted in here with \uppercase using the \uccode's.
+  \gdef\parseUTFviiiB#1#2#3#4{%
+    \advance\countUTFz by "#10\relax
+    \uccode `#3\countUTFz
+    \uppercase{\gdef\UTFviiiTmp{#2#3#4}}}
+\endgroup
+
+% For native Unicode handling (XeTeX and LuaTeX),
+% provide a definition macro that sets a catcode to `other' non-globally
+%
+\def\DeclareUnicodeCharacterNativeOther#1#2{%
+  \catcode"#1=\other
+}
+
+% https://en.wikipedia.org/wiki/Plane_(Unicode)#Basic_M
+% U+0000..U+007F = https://en.wikipedia.org/wiki/Basic_Latin_(Unicode_block)
+% U+0080..U+00FF = https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)
+% U+0100..U+017F = https://en.wikipedia.org/wiki/Latin_Extended-A
+% U+0180..U+024F = https://en.wikipedia.org/wiki/Latin_Extended-B
+%
+% Many of our renditions are less than wonderful, and all the missing
+% characters are available somewhere.  Loading the necessary fonts
+% awaits user request.  We can't truly support Unicode without
+% reimplementing everything that's been done in LaTeX for many years,
+% plus probably using luatex or xetex, and who knows what else.
+% We won't be doing that here in this simple file.  But we can try to at
+% least make most of the characters not bomb out.
+%
+\def\unicodechardefs{%
+  \DeclareUnicodeCharacter{00A0}{\tie}%
+  \DeclareUnicodeCharacter{00A1}{\exclamdown}%
+  \DeclareUnicodeCharacter{00A2}{{\tcfont \char162}}% 0242=cent
+  \DeclareUnicodeCharacter{00A3}{\pounds{}}%
+  \DeclareUnicodeCharacter{00A4}{{\tcfont \char164}}% 0244=currency
+  \DeclareUnicodeCharacter{00A5}{{\tcfont \char165}}% 0245=yen
+  \DeclareUnicodeCharacter{00A6}{{\tcfont \char166}}% 0246=brokenbar
+  \DeclareUnicodeCharacter{00A7}{\S}%
+  \DeclareUnicodeCharacter{00A8}{\"{ }}%
+  \DeclareUnicodeCharacter{00A9}{\copyright{}}%
+  \DeclareUnicodeCharacter{00AA}{\ordf}%
+  \DeclareUnicodeCharacter{00AB}{\guillemetleft{}}%
+  \DeclareUnicodeCharacter{00AC}{\ensuremath\lnot}%
+  \DeclareUnicodeCharacter{00AD}{\-}%
+  \DeclareUnicodeCharacter{00AE}{\registeredsymbol{}}%
+  \DeclareUnicodeCharacter{00AF}{\={ }}%
+  %
+  \DeclareUnicodeCharacter{00B0}{\ringaccent{ }}%
+  \DeclareUnicodeCharacter{00B1}{\ensuremath\pm}%
+  \DeclareUnicodeCharacter{00B2}{$^2$}%
+  \DeclareUnicodeCharacter{00B3}{$^3$}%
+  \DeclareUnicodeCharacter{00B4}{\'{ }}%
+  \DeclareUnicodeCharacter{00B5}{$\mu$}%
+  \DeclareUnicodeCharacter{00B6}{\P}%
+  \DeclareUnicodeCharacter{00B7}{\ensuremath\cdot}%
+  \DeclareUnicodeCharacter{00B8}{\cedilla{ }}%
+  \DeclareUnicodeCharacter{00B9}{$^1$}%
+  \DeclareUnicodeCharacter{00BA}{\ordm}%
+  \DeclareUnicodeCharacter{00BB}{\guillemetright{}}%
+  \DeclareUnicodeCharacter{00BC}{$1\over4$}%
+  \DeclareUnicodeCharacter{00BD}{$1\over2$}%
+  \DeclareUnicodeCharacter{00BE}{$3\over4$}%
+  \DeclareUnicodeCharacter{00BF}{\questiondown}%
+  %
+  \DeclareUnicodeCharacter{00C0}{\`A}%
+  \DeclareUnicodeCharacter{00C1}{\'A}%
+  \DeclareUnicodeCharacter{00C2}{\^A}%
+  \DeclareUnicodeCharacter{00C3}{\~A}%
+  \DeclareUnicodeCharacter{00C4}{\"A}%
+  \DeclareUnicodeCharacter{00C5}{\AA}%
+  \DeclareUnicodeCharacter{00C6}{\AE}%
+  \DeclareUnicodeCharacter{00C7}{\cedilla{C}}%
+  \DeclareUnicodeCharacter{00C8}{\`E}%
+  \DeclareUnicodeCharacter{00C9}{\'E}%
+  \DeclareUnicodeCharacter{00CA}{\^E}%
+  \DeclareUnicodeCharacter{00CB}{\"E}%
+  \DeclareUnicodeCharacter{00CC}{\`I}%
+  \DeclareUnicodeCharacter{00CD}{\'I}%
+  \DeclareUnicodeCharacter{00CE}{\^I}%
+  \DeclareUnicodeCharacter{00CF}{\"I}%
+  %
+  \DeclareUnicodeCharacter{00D0}{\DH}%
+  \DeclareUnicodeCharacter{00D1}{\~N}%
+  \DeclareUnicodeCharacter{00D2}{\`O}%
+  \DeclareUnicodeCharacter{00D3}{\'O}%
+  \DeclareUnicodeCharacter{00D4}{\^O}%
+  \DeclareUnicodeCharacter{00D5}{\~O}%
+  \DeclareUnicodeCharacter{00D6}{\"O}%
+  \DeclareUnicodeCharacter{00D7}{\ensuremath\times}%
+  \DeclareUnicodeCharacter{00D8}{\O}%
+  \DeclareUnicodeCharacter{00D9}{\`U}%
+  \DeclareUnicodeCharacter{00DA}{\'U}%
+  \DeclareUnicodeCharacter{00DB}{\^U}%
+  \DeclareUnicodeCharacter{00DC}{\"U}%
+  \DeclareUnicodeCharacter{00DD}{\'Y}%
+  \DeclareUnicodeCharacter{00DE}{\TH}%
+  \DeclareUnicodeCharacter{00DF}{\ss}%
+  %
+  \DeclareUnicodeCharacter{00E0}{\`a}%
+  \DeclareUnicodeCharacter{00E1}{\'a}%
+  \DeclareUnicodeCharacter{00E2}{\^a}%
+  \DeclareUnicodeCharacter{00E3}{\~a}%
+  \DeclareUnicodeCharacter{00E4}{\"a}%
+  \DeclareUnicodeCharacter{00E5}{\aa}%
+  \DeclareUnicodeCharacter{00E6}{\ae}%
+  \DeclareUnicodeCharacter{00E7}{\cedilla{c}}%
+  \DeclareUnicodeCharacter{00E8}{\`e}%
+  \DeclareUnicodeCharacter{00E9}{\'e}%
+  \DeclareUnicodeCharacter{00EA}{\^e}%
+  \DeclareUnicodeCharacter{00EB}{\"e}%
+  \DeclareUnicodeCharacter{00EC}{\`{\dotless{i}}}%
+  \DeclareUnicodeCharacter{00ED}{\'{\dotless{i}}}%
+  \DeclareUnicodeCharacter{00EE}{\^{\dotless{i}}}%
+  \DeclareUnicodeCharacter{00EF}{\"{\dotless{i}}}%
+  %
+  \DeclareUnicodeCharacter{00F0}{\dh}%
+  \DeclareUnicodeCharacter{00F1}{\~n}%
+  \DeclareUnicodeCharacter{00F2}{\`o}%
+  \DeclareUnicodeCharacter{00F3}{\'o}%
+  \DeclareUnicodeCharacter{00F4}{\^o}%
+  \DeclareUnicodeCharacter{00F5}{\~o}%
+  \DeclareUnicodeCharacter{00F6}{\"o}%
+  \DeclareUnicodeCharacter{00F7}{\ensuremath\div}%
+  \DeclareUnicodeCharacter{00F8}{\o}%
+  \DeclareUnicodeCharacter{00F9}{\`u}%
+  \DeclareUnicodeCharacter{00FA}{\'u}%
+  \DeclareUnicodeCharacter{00FB}{\^u}%
+  \DeclareUnicodeCharacter{00FC}{\"u}%
+  \DeclareUnicodeCharacter{00FD}{\'y}%
+  \DeclareUnicodeCharacter{00FE}{\th}%
+  \DeclareUnicodeCharacter{00FF}{\"y}%
+  %
+  \DeclareUnicodeCharacter{0100}{\=A}%
+  \DeclareUnicodeCharacter{0101}{\=a}%
+  \DeclareUnicodeCharacter{0102}{\u{A}}%
+  \DeclareUnicodeCharacter{0103}{\u{a}}%
+  \DeclareUnicodeCharacter{0104}{\ogonek{A}}%
+  \DeclareUnicodeCharacter{0105}{\ogonek{a}}%
+  \DeclareUnicodeCharacter{0106}{\'C}%
+  \DeclareUnicodeCharacter{0107}{\'c}%
+  \DeclareUnicodeCharacter{0108}{\^C}%
+  \DeclareUnicodeCharacter{0109}{\^c}%
+  \DeclareUnicodeCharacter{010A}{\dotaccent{C}}%
+  \DeclareUnicodeCharacter{010B}{\dotaccent{c}}%
+  \DeclareUnicodeCharacter{010C}{\v{C}}%
+  \DeclareUnicodeCharacter{010D}{\v{c}}%
+  \DeclareUnicodeCharacter{010E}{\v{D}}%
+  \DeclareUnicodeCharacter{010F}{d'}%
+  %
+  \DeclareUnicodeCharacter{0110}{\DH}%
+  \DeclareUnicodeCharacter{0111}{\dh}%
+  \DeclareUnicodeCharacter{0112}{\=E}%
+  \DeclareUnicodeCharacter{0113}{\=e}%
+  \DeclareUnicodeCharacter{0114}{\u{E}}%
+  \DeclareUnicodeCharacter{0115}{\u{e}}%
+  \DeclareUnicodeCharacter{0116}{\dotaccent{E}}%
+  \DeclareUnicodeCharacter{0117}{\dotaccent{e}}%
+  \DeclareUnicodeCharacter{0118}{\ogonek{E}}%
+  \DeclareUnicodeCharacter{0119}{\ogonek{e}}%
+  \DeclareUnicodeCharacter{011A}{\v{E}}%
+  \DeclareUnicodeCharacter{011B}{\v{e}}%
+  \DeclareUnicodeCharacter{011C}{\^G}%
+  \DeclareUnicodeCharacter{011D}{\^g}%
+  \DeclareUnicodeCharacter{011E}{\u{G}}%
+  \DeclareUnicodeCharacter{011F}{\u{g}}%
+  %
+  \DeclareUnicodeCharacter{0120}{\dotaccent{G}}%
+  \DeclareUnicodeCharacter{0121}{\dotaccent{g}}%
+  \DeclareUnicodeCharacter{0122}{\cedilla{G}}%
+  \DeclareUnicodeCharacter{0123}{\cedilla{g}}%
+  \DeclareUnicodeCharacter{0124}{\^H}%
+  \DeclareUnicodeCharacter{0125}{\^h}%
+  \DeclareUnicodeCharacter{0126}{\missingcharmsg{H WITH STROKE}}%
+  \DeclareUnicodeCharacter{0127}{\missingcharmsg{h WITH STROKE}}%
+  \DeclareUnicodeCharacter{0128}{\~I}%
+  \DeclareUnicodeCharacter{0129}{\~{\dotless{i}}}%
+  \DeclareUnicodeCharacter{012A}{\=I}%
+  \DeclareUnicodeCharacter{012B}{\={\dotless{i}}}%
+  \DeclareUnicodeCharacter{012C}{\u{I}}%
+  \DeclareUnicodeCharacter{012D}{\u{\dotless{i}}}%
+  \DeclareUnicodeCharacter{012E}{\ogonek{I}}%
+  \DeclareUnicodeCharacter{012F}{\ogonek{i}}%
+  %
+  \DeclareUnicodeCharacter{0130}{\dotaccent{I}}%
+  \DeclareUnicodeCharacter{0131}{\dotless{i}}%
+  \DeclareUnicodeCharacter{0132}{IJ}%
+  \DeclareUnicodeCharacter{0133}{ij}%
+  \DeclareUnicodeCharacter{0134}{\^J}%
+  \DeclareUnicodeCharacter{0135}{\^{\dotless{j}}}%
+  \DeclareUnicodeCharacter{0136}{\cedilla{K}}%
+  \DeclareUnicodeCharacter{0137}{\cedilla{k}}%
+  \DeclareUnicodeCharacter{0138}{\ensuremath\kappa}%
+  \DeclareUnicodeCharacter{0139}{\'L}%
+  \DeclareUnicodeCharacter{013A}{\'l}%
+  \DeclareUnicodeCharacter{013B}{\cedilla{L}}%
+  \DeclareUnicodeCharacter{013C}{\cedilla{l}}%
+  \DeclareUnicodeCharacter{013D}{L'}% should kern
+  \DeclareUnicodeCharacter{013E}{l'}% should kern
+  \DeclareUnicodeCharacter{013F}{L\U{00B7}}%
+  %
+  \DeclareUnicodeCharacter{0140}{l\U{00B7}}%
+  \DeclareUnicodeCharacter{0141}{\L}%
+  \DeclareUnicodeCharacter{0142}{\l}%
+  \DeclareUnicodeCharacter{0143}{\'N}%
+  \DeclareUnicodeCharacter{0144}{\'n}%
+  \DeclareUnicodeCharacter{0145}{\cedilla{N}}%
+  \DeclareUnicodeCharacter{0146}{\cedilla{n}}%
+  \DeclareUnicodeCharacter{0147}{\v{N}}%
+  \DeclareUnicodeCharacter{0148}{\v{n}}%
+  \DeclareUnicodeCharacter{0149}{'n}%
+  \DeclareUnicodeCharacter{014A}{\missingcharmsg{ENG}}%
+  \DeclareUnicodeCharacter{014B}{\missingcharmsg{eng}}%
+  \DeclareUnicodeCharacter{014C}{\=O}%
+  \DeclareUnicodeCharacter{014D}{\=o}%
+  \DeclareUnicodeCharacter{014E}{\u{O}}%
+  \DeclareUnicodeCharacter{014F}{\u{o}}%
+  %
+  \DeclareUnicodeCharacter{0150}{\H{O}}%
+  \DeclareUnicodeCharacter{0151}{\H{o}}%
+  \DeclareUnicodeCharacter{0152}{\OE}%
+  \DeclareUnicodeCharacter{0153}{\oe}%
+  \DeclareUnicodeCharacter{0154}{\'R}%
+  \DeclareUnicodeCharacter{0155}{\'r}%
+  \DeclareUnicodeCharacter{0156}{\cedilla{R}}%
+  \DeclareUnicodeCharacter{0157}{\cedilla{r}}%
+  \DeclareUnicodeCharacter{0158}{\v{R}}%
+  \DeclareUnicodeCharacter{0159}{\v{r}}%
+  \DeclareUnicodeCharacter{015A}{\'S}%
+  \DeclareUnicodeCharacter{015B}{\'s}%
+  \DeclareUnicodeCharacter{015C}{\^S}%
+  \DeclareUnicodeCharacter{015D}{\^s}%
+  \DeclareUnicodeCharacter{015E}{\cedilla{S}}%
+  \DeclareUnicodeCharacter{015F}{\cedilla{s}}%
+  %
+  \DeclareUnicodeCharacter{0160}{\v{S}}%
+  \DeclareUnicodeCharacter{0161}{\v{s}}%
+  \DeclareUnicodeCharacter{0162}{\cedilla{T}}%
+  \DeclareUnicodeCharacter{0163}{\cedilla{t}}%
+  \DeclareUnicodeCharacter{0164}{\v{T}}%
+  \DeclareUnicodeCharacter{0165}{\v{t}}%
+  \DeclareUnicodeCharacter{0166}{\missingcharmsg{H WITH STROKE}}%
+  \DeclareUnicodeCharacter{0167}{\missingcharmsg{h WITH STROKE}}%
+  \DeclareUnicodeCharacter{0168}{\~U}%
+  \DeclareUnicodeCharacter{0169}{\~u}%
+  \DeclareUnicodeCharacter{016A}{\=U}%
+  \DeclareUnicodeCharacter{016B}{\=u}%
+  \DeclareUnicodeCharacter{016C}{\u{U}}%
+  \DeclareUnicodeCharacter{016D}{\u{u}}%
+  \DeclareUnicodeCharacter{016E}{\ringaccent{U}}%
+  \DeclareUnicodeCharacter{016F}{\ringaccent{u}}%
+  %
+  \DeclareUnicodeCharacter{0170}{\H{U}}%
+  \DeclareUnicodeCharacter{0171}{\H{u}}%
+  \DeclareUnicodeCharacter{0172}{\ogonek{U}}%
+  \DeclareUnicodeCharacter{0173}{\ogonek{u}}%
+  \DeclareUnicodeCharacter{0174}{\^W}%
+  \DeclareUnicodeCharacter{0175}{\^w}%
+  \DeclareUnicodeCharacter{0176}{\^Y}%
+  \DeclareUnicodeCharacter{0177}{\^y}%
+  \DeclareUnicodeCharacter{0178}{\"Y}%
+  \DeclareUnicodeCharacter{0179}{\'Z}%
+  \DeclareUnicodeCharacter{017A}{\'z}%
+  \DeclareUnicodeCharacter{017B}{\dotaccent{Z}}%
+  \DeclareUnicodeCharacter{017C}{\dotaccent{z}}%
+  \DeclareUnicodeCharacter{017D}{\v{Z}}%
+  \DeclareUnicodeCharacter{017E}{\v{z}}%
+  \DeclareUnicodeCharacter{017F}{\missingcharmsg{LONG S}}%
+  %
+  \DeclareUnicodeCharacter{01C4}{D\v{Z}}%
+  \DeclareUnicodeCharacter{01C5}{D\v{z}}%
+  \DeclareUnicodeCharacter{01C6}{d\v{z}}%
+  \DeclareUnicodeCharacter{01C7}{LJ}%
+  \DeclareUnicodeCharacter{01C8}{Lj}%
+  \DeclareUnicodeCharacter{01C9}{lj}%
+  \DeclareUnicodeCharacter{01CA}{NJ}%
+  \DeclareUnicodeCharacter{01CB}{Nj}%
+  \DeclareUnicodeCharacter{01CC}{nj}%
+  \DeclareUnicodeCharacter{01CD}{\v{A}}%
+  \DeclareUnicodeCharacter{01CE}{\v{a}}%
+  \DeclareUnicodeCharacter{01CF}{\v{I}}%
+  %
+  \DeclareUnicodeCharacter{01D0}{\v{\dotless{i}}}%
+  \DeclareUnicodeCharacter{01D1}{\v{O}}%
+  \DeclareUnicodeCharacter{01D2}{\v{o}}%
+  \DeclareUnicodeCharacter{01D3}{\v{U}}%
+  \DeclareUnicodeCharacter{01D4}{\v{u}}%
+  %
+  \DeclareUnicodeCharacter{01E2}{\={\AE}}%
+  \DeclareUnicodeCharacter{01E3}{\={\ae}}%
+  \DeclareUnicodeCharacter{01E6}{\v{G}}%
+  \DeclareUnicodeCharacter{01E7}{\v{g}}%
+  \DeclareUnicodeCharacter{01E8}{\v{K}}%
+  \DeclareUnicodeCharacter{01E9}{\v{k}}%
+  %
+  \DeclareUnicodeCharacter{01F0}{\v{\dotless{j}}}%
+  \DeclareUnicodeCharacter{01F1}{DZ}%
+  \DeclareUnicodeCharacter{01F2}{Dz}%
+  \DeclareUnicodeCharacter{01F3}{dz}%
+  \DeclareUnicodeCharacter{01F4}{\'G}%
+  \DeclareUnicodeCharacter{01F5}{\'g}%
+  \DeclareUnicodeCharacter{01F8}{\`N}%
+  \DeclareUnicodeCharacter{01F9}{\`n}%
+  \DeclareUnicodeCharacter{01FC}{\'{\AE}}%
+  \DeclareUnicodeCharacter{01FD}{\'{\ae}}%
+  \DeclareUnicodeCharacter{01FE}{\'{\O}}%
+  \DeclareUnicodeCharacter{01FF}{\'{\o}}%
+  %
+  \DeclareUnicodeCharacter{021E}{\v{H}}%
+  \DeclareUnicodeCharacter{021F}{\v{h}}%
+  %
+  \DeclareUnicodeCharacter{0226}{\dotaccent{A}}%
+  \DeclareUnicodeCharacter{0227}{\dotaccent{a}}%
+  \DeclareUnicodeCharacter{0228}{\cedilla{E}}%
+  \DeclareUnicodeCharacter{0229}{\cedilla{e}}%
+  \DeclareUnicodeCharacter{022E}{\dotaccent{O}}%
+  \DeclareUnicodeCharacter{022F}{\dotaccent{o}}%
+  %
+  \DeclareUnicodeCharacter{0232}{\=Y}%
+  \DeclareUnicodeCharacter{0233}{\=y}%
+  \DeclareUnicodeCharacter{0237}{\dotless{j}}%
+  %
+  \DeclareUnicodeCharacter{02BC}{'}%
+  %
+  \DeclareUnicodeCharacter{02DB}{\ogonek{ }}%
+  %
+  % Greek letters upper case
+  \DeclareUnicodeCharacter{0391}{{\it A}}%
+  \DeclareUnicodeCharacter{0392}{{\it B}}%
+  \DeclareUnicodeCharacter{0393}{\ensuremath{\mit\Gamma}}%
+  \DeclareUnicodeCharacter{0394}{\ensuremath{\mit\Delta}}%
+  \DeclareUnicodeCharacter{0395}{{\it E}}%
+  \DeclareUnicodeCharacter{0396}{{\it Z}}%
+  \DeclareUnicodeCharacter{0397}{{\it H}}%
+  \DeclareUnicodeCharacter{0398}{\ensuremath{\mit\Theta}}%
+  \DeclareUnicodeCharacter{0399}{{\it I}}%
+  \DeclareUnicodeCharacter{039A}{{\it K}}%
+  \DeclareUnicodeCharacter{039B}{\ensuremath{\mit\Lambda}}%
+  \DeclareUnicodeCharacter{039C}{{\it M}}%
+  \DeclareUnicodeCharacter{039D}{{\it N}}%
+  \DeclareUnicodeCharacter{039E}{\ensuremath{\mit\Xi}}%
+  \DeclareUnicodeCharacter{039F}{{\it O}}%
+  \DeclareUnicodeCharacter{03A0}{\ensuremath{\mit\Pi}}%
+  \DeclareUnicodeCharacter{03A1}{{\it P}}%
+  %\DeclareUnicodeCharacter{03A2}{} % none - corresponds to final sigma
+  \DeclareUnicodeCharacter{03A3}{\ensuremath{\mit\Sigma}}%
+  \DeclareUnicodeCharacter{03A4}{{\it T}}%
+  \DeclareUnicodeCharacter{03A5}{\ensuremath{\mit\Upsilon}}%
+  \DeclareUnicodeCharacter{03A6}{\ensuremath{\mit\Phi}}%
+  \DeclareUnicodeCharacter{03A7}{{\it X}}%
+  \DeclareUnicodeCharacter{03A8}{\ensuremath{\mit\Psi}}%
+  \DeclareUnicodeCharacter{03A9}{\ensuremath{\mit\Omega}}%
+  %
+  % Vowels with accents
+  \DeclareUnicodeCharacter{0390}{\ensuremath{\ddot{\acute\iota}}}%
+  \DeclareUnicodeCharacter{03AC}{\ensuremath{\acute\alpha}}%
+  \DeclareUnicodeCharacter{03AD}{\ensuremath{\acute\epsilon}}%
+  \DeclareUnicodeCharacter{03AE}{\ensuremath{\acute\eta}}%
+  \DeclareUnicodeCharacter{03AF}{\ensuremath{\acute\iota}}%
+  \DeclareUnicodeCharacter{03B0}{\ensuremath{\acute{\ddot\upsilon}}}%
+  %
+  % Standalone accent
+  \DeclareUnicodeCharacter{0384}{\ensuremath{\acute{\ }}}%
+  %
+  % Greek letters lower case
+  \DeclareUnicodeCharacter{03B1}{\ensuremath\alpha}%
+  \DeclareUnicodeCharacter{03B2}{\ensuremath\beta}%
+  \DeclareUnicodeCharacter{03B3}{\ensuremath\gamma}%
+  \DeclareUnicodeCharacter{03B4}{\ensuremath\delta}%
+  \DeclareUnicodeCharacter{03B5}{\ensuremath\epsilon}%
+  \DeclareUnicodeCharacter{03B6}{\ensuremath\zeta}%
+  \DeclareUnicodeCharacter{03B7}{\ensuremath\eta}%
+  \DeclareUnicodeCharacter{03B8}{\ensuremath\theta}%
+  \DeclareUnicodeCharacter{03B9}{\ensuremath\iota}%
+  \DeclareUnicodeCharacter{03BA}{\ensuremath\kappa}%
+  \DeclareUnicodeCharacter{03BB}{\ensuremath\lambda}%
+  \DeclareUnicodeCharacter{03BC}{\ensuremath\mu}%
+  \DeclareUnicodeCharacter{03BD}{\ensuremath\nu}%
+  \DeclareUnicodeCharacter{03BE}{\ensuremath\xi}%
+  \DeclareUnicodeCharacter{03BF}{{\it o}}% omicron
+  \DeclareUnicodeCharacter{03C0}{\ensuremath\pi}%
+  \DeclareUnicodeCharacter{03C1}{\ensuremath\rho}%
+  \DeclareUnicodeCharacter{03C2}{\ensuremath\varsigma}%
+  \DeclareUnicodeCharacter{03C3}{\ensuremath\sigma}%
+  \DeclareUnicodeCharacter{03C4}{\ensuremath\tau}%
+  \DeclareUnicodeCharacter{03C5}{\ensuremath\upsilon}%
+  \DeclareUnicodeCharacter{03C6}{\ensuremath\phi}%
+  \DeclareUnicodeCharacter{03C7}{\ensuremath\chi}%
+  \DeclareUnicodeCharacter{03C8}{\ensuremath\psi}%
+  \DeclareUnicodeCharacter{03C9}{\ensuremath\omega}%
+  %
+  % More Greek vowels with accents
+  \DeclareUnicodeCharacter{03CA}{\ensuremath{\ddot\iota}}%
+  \DeclareUnicodeCharacter{03CB}{\ensuremath{\ddot\upsilon}}%
+  \DeclareUnicodeCharacter{03CC}{\ensuremath{\acute o}}%
+  \DeclareUnicodeCharacter{03CD}{\ensuremath{\acute\upsilon}}%
+  \DeclareUnicodeCharacter{03CE}{\ensuremath{\acute\omega}}%
+  %
+  % Variant Greek letters
+  \DeclareUnicodeCharacter{03D1}{\ensuremath\vartheta}%
+  \DeclareUnicodeCharacter{03D6}{\ensuremath\varpi}%
+  \DeclareUnicodeCharacter{03F1}{\ensuremath\varrho}%
+  %
+  \DeclareUnicodeCharacter{1E02}{\dotaccent{B}}%
+  \DeclareUnicodeCharacter{1E03}{\dotaccent{b}}%
+  \DeclareUnicodeCharacter{1E04}{\udotaccent{B}}%
+  \DeclareUnicodeCharacter{1E05}{\udotaccent{b}}%
+  \DeclareUnicodeCharacter{1E06}{\ubaraccent{B}}%
+  \DeclareUnicodeCharacter{1E07}{\ubaraccent{b}}%
+  \DeclareUnicodeCharacter{1E0A}{\dotaccent{D}}%
+  \DeclareUnicodeCharacter{1E0B}{\dotaccent{d}}%
+  \DeclareUnicodeCharacter{1E0C}{\udotaccent{D}}%
+  \DeclareUnicodeCharacter{1E0D}{\udotaccent{d}}%
+  \DeclareUnicodeCharacter{1E0E}{\ubaraccent{D}}%
+  \DeclareUnicodeCharacter{1E0F}{\ubaraccent{d}}%
+  %
+  \DeclareUnicodeCharacter{1E1E}{\dotaccent{F}}%
+  \DeclareUnicodeCharacter{1E1F}{\dotaccent{f}}%
+  %
+  \DeclareUnicodeCharacter{1E20}{\=G}%
+  \DeclareUnicodeCharacter{1E21}{\=g}%
+  \DeclareUnicodeCharacter{1E22}{\dotaccent{H}}%
+  \DeclareUnicodeCharacter{1E23}{\dotaccent{h}}%
+  \DeclareUnicodeCharacter{1E24}{\udotaccent{H}}%
+  \DeclareUnicodeCharacter{1E25}{\udotaccent{h}}%
+  \DeclareUnicodeCharacter{1E26}{\"H}%
+  \DeclareUnicodeCharacter{1E27}{\"h}%
+  %
+  \DeclareUnicodeCharacter{1E30}{\'K}%
+  \DeclareUnicodeCharacter{1E31}{\'k}%
+  \DeclareUnicodeCharacter{1E32}{\udotaccent{K}}%
+  \DeclareUnicodeCharacter{1E33}{\udotaccent{k}}%
+  \DeclareUnicodeCharacter{1E34}{\ubaraccent{K}}%
+  \DeclareUnicodeCharacter{1E35}{\ubaraccent{k}}%
+  \DeclareUnicodeCharacter{1E36}{\udotaccent{L}}%
+  \DeclareUnicodeCharacter{1E37}{\udotaccent{l}}%
+  \DeclareUnicodeCharacter{1E3A}{\ubaraccent{L}}%
+  \DeclareUnicodeCharacter{1E3B}{\ubaraccent{l}}%
+  \DeclareUnicodeCharacter{1E3E}{\'M}%
+  \DeclareUnicodeCharacter{1E3F}{\'m}%
+  %
+  \DeclareUnicodeCharacter{1E40}{\dotaccent{M}}%
+  \DeclareUnicodeCharacter{1E41}{\dotaccent{m}}%
+  \DeclareUnicodeCharacter{1E42}{\udotaccent{M}}%
+  \DeclareUnicodeCharacter{1E43}{\udotaccent{m}}%
+  \DeclareUnicodeCharacter{1E44}{\dotaccent{N}}%
+  \DeclareUnicodeCharacter{1E45}{\dotaccent{n}}%
+  \DeclareUnicodeCharacter{1E46}{\udotaccent{N}}%
+  \DeclareUnicodeCharacter{1E47}{\udotaccent{n}}%
+  \DeclareUnicodeCharacter{1E48}{\ubaraccent{N}}%
+  \DeclareUnicodeCharacter{1E49}{\ubaraccent{n}}%
+  %
+  \DeclareUnicodeCharacter{1E54}{\'P}%
+  \DeclareUnicodeCharacter{1E55}{\'p}%
+  \DeclareUnicodeCharacter{1E56}{\dotaccent{P}}%
+  \DeclareUnicodeCharacter{1E57}{\dotaccent{p}}%
+  \DeclareUnicodeCharacter{1E58}{\dotaccent{R}}%
+  \DeclareUnicodeCharacter{1E59}{\dotaccent{r}}%
+  \DeclareUnicodeCharacter{1E5A}{\udotaccent{R}}%
+  \DeclareUnicodeCharacter{1E5B}{\udotaccent{r}}%
+  \DeclareUnicodeCharacter{1E5E}{\ubaraccent{R}}%
+  \DeclareUnicodeCharacter{1E5F}{\ubaraccent{r}}%
+  %
+  \DeclareUnicodeCharacter{1E60}{\dotaccent{S}}%
+  \DeclareUnicodeCharacter{1E61}{\dotaccent{s}}%
+  \DeclareUnicodeCharacter{1E62}{\udotaccent{S}}%
+  \DeclareUnicodeCharacter{1E63}{\udotaccent{s}}%
+  \DeclareUnicodeCharacter{1E6A}{\dotaccent{T}}%
+  \DeclareUnicodeCharacter{1E6B}{\dotaccent{t}}%
+  \DeclareUnicodeCharacter{1E6C}{\udotaccent{T}}%
+  \DeclareUnicodeCharacter{1E6D}{\udotaccent{t}}%
+  \DeclareUnicodeCharacter{1E6E}{\ubaraccent{T}}%
+  \DeclareUnicodeCharacter{1E6F}{\ubaraccent{t}}%
+  %
+  \DeclareUnicodeCharacter{1E7C}{\~V}%
+  \DeclareUnicodeCharacter{1E7D}{\~v}%
+  \DeclareUnicodeCharacter{1E7E}{\udotaccent{V}}%
+  \DeclareUnicodeCharacter{1E7F}{\udotaccent{v}}%
+  %
+  \DeclareUnicodeCharacter{1E80}{\`W}%
+  \DeclareUnicodeCharacter{1E81}{\`w}%
+  \DeclareUnicodeCharacter{1E82}{\'W}%
+  \DeclareUnicodeCharacter{1E83}{\'w}%
+  \DeclareUnicodeCharacter{1E84}{\"W}%
+  \DeclareUnicodeCharacter{1E85}{\"w}%
+  \DeclareUnicodeCharacter{1E86}{\dotaccent{W}}%
+  \DeclareUnicodeCharacter{1E87}{\dotaccent{w}}%
+  \DeclareUnicodeCharacter{1E88}{\udotaccent{W}}%
+  \DeclareUnicodeCharacter{1E89}{\udotaccent{w}}%
+  \DeclareUnicodeCharacter{1E8A}{\dotaccent{X}}%
+  \DeclareUnicodeCharacter{1E8B}{\dotaccent{x}}%
+  \DeclareUnicodeCharacter{1E8C}{\"X}%
+  \DeclareUnicodeCharacter{1E8D}{\"x}%
+  \DeclareUnicodeCharacter{1E8E}{\dotaccent{Y}}%
+  \DeclareUnicodeCharacter{1E8F}{\dotaccent{y}}%
+  %
+  \DeclareUnicodeCharacter{1E90}{\^Z}%
+  \DeclareUnicodeCharacter{1E91}{\^z}%
+  \DeclareUnicodeCharacter{1E92}{\udotaccent{Z}}%
+  \DeclareUnicodeCharacter{1E93}{\udotaccent{z}}%
+  \DeclareUnicodeCharacter{1E94}{\ubaraccent{Z}}%
+  \DeclareUnicodeCharacter{1E95}{\ubaraccent{z}}%
+  \DeclareUnicodeCharacter{1E96}{\ubaraccent{h}}%
+  \DeclareUnicodeCharacter{1E97}{\"t}%
+  \DeclareUnicodeCharacter{1E98}{\ringaccent{w}}%
+  \DeclareUnicodeCharacter{1E99}{\ringaccent{y}}%
+  %
+  \DeclareUnicodeCharacter{1EA0}{\udotaccent{A}}%
+  \DeclareUnicodeCharacter{1EA1}{\udotaccent{a}}%
+  %
+  \DeclareUnicodeCharacter{1EB8}{\udotaccent{E}}%
+  \DeclareUnicodeCharacter{1EB9}{\udotaccent{e}}%
+  \DeclareUnicodeCharacter{1EBC}{\~E}%
+  \DeclareUnicodeCharacter{1EBD}{\~e}%
+  %
+  \DeclareUnicodeCharacter{1ECA}{\udotaccent{I}}%
+  \DeclareUnicodeCharacter{1ECB}{\udotaccent{i}}%
+  \DeclareUnicodeCharacter{1ECC}{\udotaccent{O}}%
+  \DeclareUnicodeCharacter{1ECD}{\udotaccent{o}}%
+  %
+  \DeclareUnicodeCharacter{1EE4}{\udotaccent{U}}%
+  \DeclareUnicodeCharacter{1EE5}{\udotaccent{u}}%
+  %
+  \DeclareUnicodeCharacter{1EF2}{\`Y}%
+  \DeclareUnicodeCharacter{1EF3}{\`y}%
+  \DeclareUnicodeCharacter{1EF4}{\udotaccent{Y}}%
+  %
+  \DeclareUnicodeCharacter{1EF8}{\~Y}%
+  \DeclareUnicodeCharacter{1EF9}{\~y}%
+  %
+  % Punctuation
+  \DeclareUnicodeCharacter{2013}{--}%
+  \DeclareUnicodeCharacter{2014}{---}%
+  \DeclareUnicodeCharacter{2018}{\quoteleft{}}%
+  \DeclareUnicodeCharacter{2019}{\quoteright{}}%
+  \DeclareUnicodeCharacter{201A}{\quotesinglbase{}}%
+  \DeclareUnicodeCharacter{201C}{\quotedblleft{}}%
+  \DeclareUnicodeCharacter{201D}{\quotedblright{}}%
+  \DeclareUnicodeCharacter{201E}{\quotedblbase{}}%
+  \DeclareUnicodeCharacter{2020}{\ensuremath\dagger}%
+  \DeclareUnicodeCharacter{2021}{\ensuremath\ddagger}%
+  \DeclareUnicodeCharacter{2022}{\bullet{}}%
+  \DeclareUnicodeCharacter{202F}{\thinspace}%
+  \DeclareUnicodeCharacter{2026}{\dots{}}%
+  \DeclareUnicodeCharacter{2039}{\guilsinglleft{}}%
+  \DeclareUnicodeCharacter{203A}{\guilsinglright{}}%
+  %
+  \DeclareUnicodeCharacter{20AC}{\euro{}}%
+  %
+  \DeclareUnicodeCharacter{2192}{\expansion{}}%
+  \DeclareUnicodeCharacter{21D2}{\result{}}%
+  %
+  % Mathematical symbols
+  \DeclareUnicodeCharacter{2200}{\ensuremath\forall}%
+  \DeclareUnicodeCharacter{2203}{\ensuremath\exists}%
+  \DeclareUnicodeCharacter{2208}{\ensuremath\in}%
+  \DeclareUnicodeCharacter{2212}{\minus{}}%
+  \DeclareUnicodeCharacter{2217}{\ast}%
+  \DeclareUnicodeCharacter{221E}{\ensuremath\infty}%
+  \DeclareUnicodeCharacter{2225}{\ensuremath\parallel}%
+  \DeclareUnicodeCharacter{2227}{\ensuremath\wedge}%
+  \DeclareUnicodeCharacter{2229}{\ensuremath\cap}%
+  \DeclareUnicodeCharacter{2261}{\equiv{}}%
+  \DeclareUnicodeCharacter{2264}{\ensuremath\leq}%
+  \DeclareUnicodeCharacter{2265}{\ensuremath\geq}%
+  \DeclareUnicodeCharacter{2282}{\ensuremath\subset}%
+  \DeclareUnicodeCharacter{2287}{\ensuremath\supseteq}%
+  %
+  \DeclareUnicodeCharacter{2016}{\ensuremath\Vert}%
+  \DeclareUnicodeCharacter{2032}{\ensuremath\prime}%
+  \DeclareUnicodeCharacter{210F}{\ensuremath\hbar}%
+  \DeclareUnicodeCharacter{2111}{\ensuremath\Im}%
+  \DeclareUnicodeCharacter{2113}{\ensuremath\ell}%
+  \DeclareUnicodeCharacter{2118}{\ensuremath\wp}%
+  \DeclareUnicodeCharacter{211C}{\ensuremath\Re}%
+  \DeclareUnicodeCharacter{2135}{\ensuremath\aleph}%
+  \DeclareUnicodeCharacter{2190}{\ensuremath\leftarrow}%
+  \DeclareUnicodeCharacter{2191}{\ensuremath\uparrow}%
+  \DeclareUnicodeCharacter{2193}{\ensuremath\downarrow}%
+  \DeclareUnicodeCharacter{2194}{\ensuremath\leftrightarrow}%
+  \DeclareUnicodeCharacter{2195}{\ensuremath\updownarrow}%
+  \DeclareUnicodeCharacter{2196}{\ensuremath\nwarrow}%
+  \DeclareUnicodeCharacter{2197}{\ensuremath\nearrow}%
+  \DeclareUnicodeCharacter{2198}{\ensuremath\searrow}%
+  \DeclareUnicodeCharacter{2199}{\ensuremath\swarrow}%
+  \DeclareUnicodeCharacter{21A6}{\ensuremath\mapsto}%
+  \DeclareUnicodeCharacter{21A9}{\ensuremath\hookleftarrow}%
+  \DeclareUnicodeCharacter{21AA}{\ensuremath\hookrightarrow}%
+  \DeclareUnicodeCharacter{21BC}{\ensuremath\leftharpoonup}%
+  \DeclareUnicodeCharacter{21BD}{\ensuremath\leftharpoondown}%
+  \DeclareUnicodeCharacter{21C0}{\ensuremath\rightharpoonup}%
+  \DeclareUnicodeCharacter{21C1}{\ensuremath\rightharpoondown}%
+  \DeclareUnicodeCharacter{21CC}{\ensuremath\rightleftharpoons}%
+  \DeclareUnicodeCharacter{21D0}{\ensuremath\Leftarrow}%
+  \DeclareUnicodeCharacter{21D1}{\ensuremath\Uparrow}%
+  \DeclareUnicodeCharacter{21D3}{\ensuremath\Downarrow}%
+  \DeclareUnicodeCharacter{21D4}{\ensuremath\Leftrightarrow}%
+  \DeclareUnicodeCharacter{21D5}{\ensuremath\Updownarrow}%
+  \DeclareUnicodeCharacter{2202}{\ensuremath\partial}%
+  \DeclareUnicodeCharacter{2205}{\ensuremath\emptyset}%
+  \DeclareUnicodeCharacter{2207}{\ensuremath\nabla}%
+  \DeclareUnicodeCharacter{2209}{\ensuremath\notin}%
+  \DeclareUnicodeCharacter{220B}{\ensuremath\owns}%
+  \DeclareUnicodeCharacter{220F}{\ensuremath\prod}%
+  \DeclareUnicodeCharacter{2210}{\ensuremath\coprod}%
+  \DeclareUnicodeCharacter{2211}{\ensuremath\sum}%
+  \DeclareUnicodeCharacter{2213}{\ensuremath\mp}%
+  \DeclareUnicodeCharacter{2218}{\ensuremath\circ}%
+  \DeclareUnicodeCharacter{221A}{\ensuremath\surd}%
+  \DeclareUnicodeCharacter{221D}{\ensuremath\propto}%
+  \DeclareUnicodeCharacter{2220}{\ensuremath\angle}%
+  \DeclareUnicodeCharacter{2223}{\ensuremath\mid}%
+  \DeclareUnicodeCharacter{2228}{\ensuremath\vee}%
+  \DeclareUnicodeCharacter{222A}{\ensuremath\cup}%
+  \DeclareUnicodeCharacter{222B}{\ensuremath\smallint}%
+  \DeclareUnicodeCharacter{222E}{\ensuremath\oint}%
+  \DeclareUnicodeCharacter{223C}{\ensuremath\sim}%
+  \DeclareUnicodeCharacter{2240}{\ensuremath\wr}%
+  \DeclareUnicodeCharacter{2243}{\ensuremath\simeq}%
+  \DeclareUnicodeCharacter{2245}{\ensuremath\cong}%
+  \DeclareUnicodeCharacter{2248}{\ensuremath\approx}%
+  \DeclareUnicodeCharacter{224D}{\ensuremath\asymp}%
+  \DeclareUnicodeCharacter{2250}{\ensuremath\doteq}%
+  \DeclareUnicodeCharacter{2260}{\ensuremath\neq}%
+  \DeclareUnicodeCharacter{226A}{\ensuremath\ll}%
+  \DeclareUnicodeCharacter{226B}{\ensuremath\gg}%
+  \DeclareUnicodeCharacter{227A}{\ensuremath\prec}%
+  \DeclareUnicodeCharacter{227B}{\ensuremath\succ}%
+  \DeclareUnicodeCharacter{2283}{\ensuremath\supset}%
+  \DeclareUnicodeCharacter{2286}{\ensuremath\subseteq}%
+  \DeclareUnicodeCharacter{228E}{\ensuremath\uplus}%
+  \DeclareUnicodeCharacter{2291}{\ensuremath\sqsubseteq}%
+  \DeclareUnicodeCharacter{2292}{\ensuremath\sqsupseteq}%
+  \DeclareUnicodeCharacter{2293}{\ensuremath\sqcap}%
+  \DeclareUnicodeCharacter{2294}{\ensuremath\sqcup}%
+  \DeclareUnicodeCharacter{2295}{\ensuremath\oplus}%
+  \DeclareUnicodeCharacter{2296}{\ensuremath\ominus}%
+  \DeclareUnicodeCharacter{2297}{\ensuremath\otimes}%
+  \DeclareUnicodeCharacter{2298}{\ensuremath\oslash}%
+  \DeclareUnicodeCharacter{2299}{\ensuremath\odot}%
+  \DeclareUnicodeCharacter{22A2}{\ensuremath\vdash}%
+  \DeclareUnicodeCharacter{22A3}{\ensuremath\dashv}%
+  \DeclareUnicodeCharacter{22A4}{\ensuremath\ptextop}%
+  \DeclareUnicodeCharacter{22A5}{\ensuremath\bot}%
+  \DeclareUnicodeCharacter{22A8}{\ensuremath\models}%
+  \DeclareUnicodeCharacter{22C0}{\ensuremath\bigwedge}%
+  \DeclareUnicodeCharacter{22C1}{\ensuremath\bigvee}%
+  \DeclareUnicodeCharacter{22C2}{\ensuremath\bigcap}%
+  \DeclareUnicodeCharacter{22C3}{\ensuremath\bigcup}%
+  \DeclareUnicodeCharacter{22C4}{\ensuremath\diamond}%
+  \DeclareUnicodeCharacter{22C5}{\ensuremath\cdot}%
+  \DeclareUnicodeCharacter{22C6}{\ensuremath\star}%
+  \DeclareUnicodeCharacter{22C8}{\ensuremath\bowtie}%
+  \DeclareUnicodeCharacter{2308}{\ensuremath\lceil}%
+  \DeclareUnicodeCharacter{2309}{\ensuremath\rceil}%
+  \DeclareUnicodeCharacter{230A}{\ensuremath\lfloor}%
+  \DeclareUnicodeCharacter{230B}{\ensuremath\rfloor}%
+  \DeclareUnicodeCharacter{2322}{\ensuremath\frown}%
+  \DeclareUnicodeCharacter{2323}{\ensuremath\smile}%
+  %
+  \DeclareUnicodeCharacter{25B3}{\ensuremath\triangle}%
+  \DeclareUnicodeCharacter{25B7}{\ensuremath\triangleright}%
+  \DeclareUnicodeCharacter{25BD}{\ensuremath\bigtriangledown}%
+  \DeclareUnicodeCharacter{25C1}{\ensuremath\triangleleft}%
+  \DeclareUnicodeCharacter{25C7}{\ensuremath\diamond}%
+  \DeclareUnicodeCharacter{2660}{\ensuremath\spadesuit}%
+  \DeclareUnicodeCharacter{2661}{\ensuremath\heartsuit}%
+  \DeclareUnicodeCharacter{2662}{\ensuremath\diamondsuit}%
+  \DeclareUnicodeCharacter{2663}{\ensuremath\clubsuit}%
+  \DeclareUnicodeCharacter{266D}{\ensuremath\flat}%
+  \DeclareUnicodeCharacter{266E}{\ensuremath\natural}%
+  \DeclareUnicodeCharacter{266F}{\ensuremath\sharp}%
+  \DeclareUnicodeCharacter{26AA}{\ensuremath\bigcirc}%
+  \DeclareUnicodeCharacter{27B9}{\ensuremath\rangle}%
+  \DeclareUnicodeCharacter{27C2}{\ensuremath\perp}%
+  \DeclareUnicodeCharacter{27E8}{\ensuremath\langle}%
+  \DeclareUnicodeCharacter{27F5}{\ensuremath\longleftarrow}%
+  \DeclareUnicodeCharacter{27F6}{\ensuremath\longrightarrow}%
+  \DeclareUnicodeCharacter{27F7}{\ensuremath\longleftrightarrow}%
+  \DeclareUnicodeCharacter{27FC}{\ensuremath\longmapsto}%
+  \DeclareUnicodeCharacter{29F5}{\ensuremath\setminus}%
+  \DeclareUnicodeCharacter{2A00}{\ensuremath\bigodot}%
+  \DeclareUnicodeCharacter{2A01}{\ensuremath\bigoplus}%
+  \DeclareUnicodeCharacter{2A02}{\ensuremath\bigotimes}%
+  \DeclareUnicodeCharacter{2A04}{\ensuremath\biguplus}%
+  \DeclareUnicodeCharacter{2A06}{\ensuremath\bigsqcup}%
+  \DeclareUnicodeCharacter{2A3F}{\ensuremath\amalg}%
+  \DeclareUnicodeCharacter{2AAF}{\ensuremath\preceq}%
+  \DeclareUnicodeCharacter{2AB0}{\ensuremath\succeq}%
+  %
+  \global\mathchardef\checkmark="1370% actually the square root sign
+  \DeclareUnicodeCharacter{2713}{\ensuremath\checkmark}%
+}% end of \unicodechardefs
+
+% UTF-8 byte sequence (pdfTeX) definitions (replacing and @U command)
+% It makes the setting that replace UTF-8 byte sequence.
+\def\utfeightchardefs{%
+  \let\DeclareUnicodeCharacter\DeclareUnicodeCharacterUTFviii
+  \unicodechardefs
+}
+
+% Whether the active definitions of non-ASCII characters expand to
+% non-active tokens with the same character code.  This is used to
+% write characters literally, instead of using active definitions for
+% printing the correct glyphs.
+\newif\ifpassthroughchars
+\passthroughcharsfalse
+
+% For native Unicode handling (XeTeX and LuaTeX),
+% provide a definition macro to replace/pass-through a Unicode character
+%
+\def\DeclareUnicodeCharacterNative#1#2{%
+  \catcode"#1=\active
+  \def\dodeclareunicodecharacternative##1##2##3{%
+    \begingroup
+      \uccode`\~="##2\relax
+      \uppercase{\gdef~}{%
+        \ifpassthroughchars
+          ##1%
+        \else
+          ##3%
+        \fi
+      }
+    \endgroup
+  }
+  \begingroup
+    \uccode`\.="#1\relax
+    \uppercase{\def\UTFNativeTmp{.}}%
+    \expandafter\dodeclareunicodecharacternative\UTFNativeTmp{#1}{#2}%
+  \endgroup
+}
+
+% Native Unicode handling (XeTeX and LuaTeX) character replacing definition.
+% It activates the setting that replaces Unicode characters.
+\def\nativeunicodechardefs{%
+  \let\DeclareUnicodeCharacter\DeclareUnicodeCharacterNative
+  \unicodechardefs
+}
+
+% For native Unicode handling (XeTeX and LuaTeX),
+% make the character token expand
+% to the sequences given in \unicodechardefs for printing.
+\def\DeclareUnicodeCharacterNativeAtU#1#2{%
+  \def\UTFAtUTmp{#2}
+  \expandafter\globallet\csname uni:#1\endcsname \UTFAtUTmp
+}
+
+% @U command definitions for native Unicode handling (XeTeX and LuaTeX).
+\def\nativeunicodechardefsatu{%
+  \let\DeclareUnicodeCharacter\DeclareUnicodeCharacterNativeAtU
+  \unicodechardefs
+}
+
+% US-ASCII character definitions.
+\def\asciichardefs{% nothing need be done
+   \relax
+}
+
+% Define all Unicode characters we know about.  This makes UTF-8 the default
+% input encoding and allows @U to work.
+\iftxinativeunicodecapable
+  \nativeunicodechardefsatu
+\else
+  \utfeightchardefs
+\fi
+
+\message{formatting,}
+
+\newdimen\defaultparindent \defaultparindent = 15pt
+
+\chapheadingskip = 15pt plus 4pt minus 2pt
+\secheadingskip = 12pt plus 3pt minus 2pt
+\subsecheadingskip = 9pt plus 2pt minus 2pt
+
+% Prevent underfull vbox error messages.
+\vbadness = 10000
+
+% Don't be very finicky about underfull hboxes, either.
+\hbadness = 6666
+
+% Following George Bush, get rid of widows and orphans.
+\widowpenalty=10000
+\clubpenalty=10000
+
+% Use TeX 3.0's \emergencystretch to help line breaking, but if we're
+% using an old version of TeX, don't do anything.  We want the amount of
+% stretch added to depend on the line length, hence the dependence on
+% \hsize.  We call this whenever the paper size is set.
+%
+\def\setemergencystretch{%
+  \ifx\emergencystretch\thisisundefined
+    % Allow us to assign to \emergencystretch anyway.
+    \def\emergencystretch{\dimen0}%
+  \else
+    \emergencystretch = .15\hsize
+  \fi
+}
+
+% Parameters in order: 1) textheight; 2) textwidth;
+% 3) voffset; 4) hoffset; 5) binding offset; 6) topskip;
+% 7) physical page height; 8) physical page width.
+%
+% We also call \setleading{\textleading}, so the caller should define
+% \textleading.  The caller should also set \parskip.
+%
+\def\internalpagesizes#1#2#3#4#5#6#7#8{%
+  \voffset = #3\relax
+  \topskip = #6\relax
+  \splittopskip = \topskip
+  %
+  \vsize = #1\relax
+  \advance\vsize by \topskip
+  \outervsize = \vsize
+  \advance\outervsize by 2\topandbottommargin
+  \txipageheight = \vsize
+  %
+  \hsize = #2\relax
+  \outerhsize = \hsize
+  \advance\outerhsize by 0.5in
+  \txipagewidth = \hsize
+  %
+  \normaloffset = #4\relax
+  \bindingoffset = #5\relax
+  %
+  \ifpdf
+    \pdfpageheight #7\relax
+    \pdfpagewidth #8\relax
+    % if we don't reset these, they will remain at "1 true in" of
+    % whatever layout pdftex was dumped with.
+    \pdfhorigin = 1 true in
+    \pdfvorigin = 1 true in
+  \else
+    \ifx\XeTeXrevision\thisisundefined
+      \special{papersize=#8,#7}%
+    \else
+      \pdfpageheight #7\relax
+      \pdfpagewidth #8\relax
+      % XeTeX does not have \pdfhorigin and \pdfvorigin.
+    \fi
+  \fi
+  %
+  \setleading{\textleading}
+  %
+  \parindent = \defaultparindent
+  \setemergencystretch
+}
+
+% @letterpaper (the default).
+\def\letterpaper{{\globaldefs = 1
+  \parskip = 3pt plus 2pt minus 1pt
+  \textleading = 13.2pt
+  %
+  % If page is nothing but text, make it come out even.
+  \internalpagesizes{607.2pt}{6in}% that's 46 lines
+                    {\voffset}{.25in}%
+                    {\bindingoffset}{36pt}%
+                    {11in}{8.5in}%
+}}
+
+% Use @smallbook to reset parameters for 7x9.25 trim size.
+\def\smallbook{{\globaldefs = 1
+  \parskip = 2pt plus 1pt
+  \textleading = 12pt
+  %
+  \internalpagesizes{7.5in}{5in}%
+                    {-.2in}{0in}%
+                    {\bindingoffset}{16pt}%
+                    {9.25in}{7in}%
+  %
+  \lispnarrowing = 0.3in
+  \tolerance = 700
+  \contentsrightmargin = 0pt
+  \defbodyindent = .5cm
+}}
+
+% Use @smallerbook to reset parameters for 6x9 trim size.
+% (Just testing, parameters still in flux.)
+\def\smallerbook{{\globaldefs = 1
+  \parskip = 1.5pt plus 1pt
+  \textleading = 12pt
+  %
+  \internalpagesizes{7.4in}{4.8in}%
+                    {-.2in}{-.4in}%
+                    {0pt}{14pt}%
+                    {9in}{6in}%
+  %
+  \lispnarrowing = 0.25in
+  \tolerance = 700
+  \contentsrightmargin = 0pt
+  \defbodyindent = .4cm
+}}
+
+% Use @afourpaper to print on European A4 paper.
+\def\afourpaper{{\globaldefs = 1
+  \parskip = 3pt plus 2pt minus 1pt
+  \textleading = 13.2pt
+  %
+  % Double-side printing via postscript on Laserjet 4050
+  % prints double-sided nicely when \bindingoffset=10mm and \hoffset=-6mm.
+  % To change the settings for a different printer or situation, adjust
+  % \normaloffset until the front-side and back-side texts align.  Then
+  % do the same for \bindingoffset.  You can set these for testing in
+  % your texinfo source file like this:
+  % @tex
+  % \global\normaloffset = -6mm
+  % \global\bindingoffset = 10mm
+  % @end tex
+  \internalpagesizes{673.2pt}{160mm}% that's 51 lines
+                    {\voffset}{\hoffset}%
+                    {\bindingoffset}{44pt}%
+                    {297mm}{210mm}%
+  %
+  \tolerance = 700
+  \contentsrightmargin = 0pt
+  \defbodyindent = 5mm
+}}
+
+% Use @afivepaper to print on European A5 paper.
+% From romildo@urano.iceb.ufop.br, 2 July 2000.
+% He also recommends making @example and @lisp be small.
+\def\afivepaper{{\globaldefs = 1
+  \parskip = 2pt plus 1pt minus 0.1pt
+  \textleading = 12.5pt
+  %
+  \internalpagesizes{160mm}{120mm}%
+                    {\voffset}{\hoffset}%
+                    {\bindingoffset}{8pt}%
+                    {210mm}{148mm}%
+  %
+  \lispnarrowing = 0.2in
+  \tolerance = 800
+  \contentsrightmargin = 0pt
+  \defbodyindent = 2mm
+  \tableindent = 12mm
+}}
+
+% A specific text layout, 24x15cm overall, intended for A4 paper.
+\def\afourlatex{{\globaldefs = 1
+  \afourpaper
+  \internalpagesizes{237mm}{150mm}%
+                    {\voffset}{4.6mm}%
+                    {\bindingoffset}{7mm}%
+                    {297mm}{210mm}%
+  %
+  % Must explicitly reset to 0 because we call \afourpaper.
+  \globaldefs = 0
+}}
+
+% Use @afourwide to print on A4 paper in landscape format.
+\def\afourwide{{\globaldefs = 1
+  \afourpaper
+  \internalpagesizes{241mm}{165mm}%
+                    {\voffset}{-2.95mm}%
+                    {\bindingoffset}{7mm}%
+                    {297mm}{210mm}%
+  \globaldefs = 0
+}}
+
+\def\bsixpaper{{\globaldefs = 1
+  \afourpaper
+  \internalpagesizes{140mm}{100mm}%
+                    {-6.35mm}{-12.7mm}%
+                    {\bindingoffset}{14pt}%
+                    {176mm}{125mm}%
+  \let\SETdispenvsize=\smallword
+  \lispnarrowing = 0.2in
+  \globaldefs = 0
+}}
+
+
+% @pagesizes TEXTHEIGHT[,TEXTWIDTH]
+% Perhaps we should allow setting the margins, \topskip, \parskip,
+% and/or leading, also. Or perhaps we should compute them somehow.
+%
+\parseargdef\pagesizes{\pagesizesyyy #1,,\finish}
+\def\pagesizesyyy#1,#2,#3\finish{{%
+  \setbox0 = \hbox{\ignorespaces #2}\ifdim\wd0 > 0pt \hsize=#2\relax \fi
+  \globaldefs = 1
+  %
+  \parskip = 3pt plus 2pt minus 1pt
+  \setleading{\textleading}%
+  %
+  \dimen0 = #1\relax
+  \advance\dimen0 by 2.5in % default 1in margin above heading line
+                           % and 1.5in to include heading, footing and
+                           % bottom margin
+  %
+  \dimen2 = \hsize
+  \advance\dimen2 by 2in % default to 1 inch margin on each side
+  %
+  \internalpagesizes{#1}{\hsize}%
+                    {\voffset}{\normaloffset}%
+                    {\bindingoffset}{44pt}%
+                    {\dimen0}{\dimen2}%
+}}
+
+% Set default to letter.
+%
+\letterpaper
+
+% Default value of \hfuzz, for suppressing warnings about overfull hboxes.
+\hfuzz = 1pt
+
+
+\message{and turning on texinfo input format.}
+
+\def^^L{\par} % remove \outer, so ^L can appear in an @comment
+
+% DEL is a comment character, in case @c does not suffice.
+\catcode`\^^? = 14
+
+% Define macros to output various characters with catcode for normal text.
+\catcode`\"=\other \def\normaldoublequote{"}
+\catcode`\$=\other \def\normaldollar{$}%$ font-lock fix
+\catcode`\+=\other \def\normalplus{+}
+\catcode`\<=\other \def\normalless{<}
+\catcode`\>=\other \def\normalgreater{>}
+\catcode`\^=\other \def\normalcaret{^}
+\catcode`\_=\other \def\normalunderscore{_}
+\catcode`\|=\other \def\normalverticalbar{|}
+\catcode`\~=\other \def\normaltilde{~}
+
+% This macro is used to make a character print one way in \tt
+% (where it can probably be output as-is), and another way in other fonts,
+% where something hairier probably needs to be done.
+%
+% #1 is what to print if we are indeed using \tt; #2 is what to print
+% otherwise.  Since all the Computer Modern typewriter fonts have zero
+% interword stretch (and shrink), and it is reasonable to expect all
+% typewriter fonts to have this, we can check that font parameter.
+%
+\def\ifusingtt#1#2{\ifdim \fontdimen3\font=0pt #1\else #2\fi}
+
+% Same as above, but check for italic font.  Actually this also catches
+% non-italic slanted fonts since it is impossible to distinguish them from
+% italic fonts.  But since this is only used by $ and it uses \sl anyway
+% this is not a problem.
+\def\ifusingit#1#2{\ifdim \fontdimen1\font>0pt #1\else #2\fi}
+
+% Set catcodes for Texinfo file
+
+% Active characters for printing the wanted glyph.
+% Most of these we simply print from the \tt font, but for some, we can
+% use math or other variants that look better in normal text.
+%
+\catcode`\"=\active
+\def\activedoublequote{{\tt\char34}}
+\let"=\activedoublequote
+\catcode`\~=\active \def\activetilde{{\tt\char126}} \let~ = \activetilde
+\chardef\hatchar=`\^
+\catcode`\^=\active \def\activehat{{\tt \hatchar}} \let^ = \activehat
+
+\catcode`\_=\active
+\def_{\ifusingtt\normalunderscore\_}
+\def\_{\leavevmode \kern.07em \vbox{\hrule width.3em height.1ex}\kern .07em }
+\let\realunder=_
+
+\catcode`\|=\active \def|{{\tt\char124}}
+
+\chardef \less=`\<
+\catcode`\<=\active \def\activeless{{\tt \less}}\let< = \activeless
+\chardef \gtr=`\>
+\catcode`\>=\active \def\activegtr{{\tt \gtr}}\let> = \activegtr
+\catcode`\+=\active \def+{{\tt \char 43}}
+\catcode`\$=\active \def${\ifusingit{{\sl\$}}\normaldollar}%$ font-lock fix
+\catcode`\-=\active \let-=\normaldash
+
+
+% used for headline/footline in the output routine, in case the page
+% breaks in the middle of an @tex block.
+\def\texinfochars{%
+  \let< = \activeless
+  \let> = \activegtr
+  \let~ = \activetilde
+  \let^ = \activehat
+  \setregularquotes
+  \let\b = \strong
+  \let\i = \smartitalic
+  % in principle, all other definitions in \tex have to be undone too.
+}
+
+% Used sometimes to turn off (effectively) the active characters even after
+% parsing them.
+\def\turnoffactive{%
+  \normalturnoffactive
+  \otherbackslash
+}
+
+\catcode`\@=0
+
+% \backslashcurfont outputs one backslash character in current font,
+% as in \char`\\.
+\global\chardef\backslashcurfont=`\\
+
+% \realbackslash is an actual character `\' with catcode other.
+{\catcode`\\=\other @gdef@realbackslash{\}}
+
+% In Texinfo, backslash is an active character; it prints the backslash
+% in fixed width font.
+\catcode`\\=\active  % @ for escape char from now on.
+
+% Print a typewriter backslash.  For math mode, we can't simply use
+% \backslashcurfont: the story here is that in math mode, the \char
+% of \backslashcurfont ends up printing the roman \ from the math symbol
+% font (because \char in math mode uses the \mathcode, and plain.tex
+% sets \mathcode`\\="026E).  Hence we use an explicit \mathchar,
+% which is the decimal equivalent of "715c (class 7, e.g., use \fam;
+% ignored family value; char position "5C).  We can't use " for the
+% usual hex value because it has already been made active.
+
+@def@ttbackslash{{@tt @ifmmode @mathchar29020 @else @backslashcurfont @fi}}
+@let@backslashchar = @ttbackslash % @backslashchar{} is for user documents.
+
+% \otherbackslash defines an active \ to be a literal `\' character with
+% catcode other.
+@gdef@otherbackslash{@let\=@realbackslash}
+
+% Same as @turnoffactive except outputs \ as {\tt\char`\\} instead of
+% the literal character `\'.
+%
+{@catcode`- = @active
+ @gdef@normalturnoffactive{%
+   @passthroughcharstrue
+   @let-=@normaldash
+   @let"=@normaldoublequote
+   @let$=@normaldollar %$ font-lock fix
+   @let+=@normalplus
+   @let<=@normalless
+   @let>=@normalgreater
+   @let^=@normalcaret
+   @let_=@normalunderscore
+   @let|=@normalverticalbar
+   @let~=@normaltilde
+   @let\=@ttbackslash
+   @setregularquotes
+   @unsepspaces
+ }
+}
+
+% If a .fmt file is being used, characters that might appear in a file
+% name cannot be active until we have parsed the command line.
+% So turn them off again, and have @fixbackslash turn them back on.
+@catcode`+=@other @catcode`@_=@other
+
+% \enablebackslashhack - allow file to begin `\input texinfo'
+%
+% If a .fmt file is being used, we don't want the `\input texinfo' to show up.
+% That is what \eatinput is for; after that, the `\' should revert to printing
+% a backslash.
+% If the file did not have a `\input texinfo', then it is turned off after
+% the first line; otherwise the first `\' in the file would cause an error.
+% This is used on the very last line of this file, texinfo.tex.
+% We also use @c to call @fixbackslash, in case ends of lines are hidden.
+{
+@catcode`@^=7
+@catcode`@^^M=13@gdef@enablebackslashhack{%
+  @global@let\ = @eatinput%
+  @catcode`@^^M=13%
+  @def@c{@fixbackslash@c}%
+  % Definition for the newline at the end of this file.
+  @def ^^M{@let^^M@secondlinenl}%
+  % Definition for a newline in the main Texinfo file.
+  @gdef @secondlinenl{@fixbackslash}%
+  % In case the first line has a whole-line command on it
+  @let@originalparsearg@parsearg
+  @def@parsearg{@fixbackslash@originalparsearg}
+}}
+
+{@catcode`@^=7 @catcode`@^^M=13%
+@gdef@eatinput input texinfo#1^^M{@fixbackslash}}
+
+% Emergency active definition of newline, in case an active newline token
+% appears by mistake.
+{@catcode`@^=7 @catcode13=13%
+@gdef@enableemergencynewline{%
+  @gdef^^M{%
+    @par%
+    %<warning: active newline>@par%
+}}}
+
+
+@gdef@fixbackslash{%
+  @ifx\@eatinput @let\ = @ttbackslash @fi
+  @catcode13=5 % regular end of line
+  @enableemergencynewline
+  @let@c=@comment
+  @let@parsearg@originalparsearg
+  % Also turn back on active characters that might appear in the input
+  % file name, in case not using a pre-dumped format.
+  @catcode`+=@active
+  @catcode`@_=@active
+  %
+  % If texinfo.cnf is present on the system, read it.
+  % Useful for site-wide @afourpaper, etc.  This macro, @fixbackslash, gets
+  % called at the beginning of every Texinfo file.  Not opening texinfo.cnf
+  % directly in this file, texinfo.tex, makes it possible to make a format
+  % file for Texinfo.
+  %
+  @openin 1 texinfo.cnf
+  @ifeof 1 @else @input texinfo.cnf @fi
+  @closein 1
+}
+
+
+% Say @foo, not \foo, in error messages.
+@escapechar = `@@
+
+% These (along with & and #) are made active for url-breaking, so need
+% active definitions as the normal characters.
+@def@normaldot{.}
+@def@normalquest{?}
+@def@normalslash{/}
+
+% These look ok in all fonts, so just make them not special.
+% @hashchar{} gets its own user-level command, because of #line.
+@catcode`@& = @other @def@normalamp{&}
+@catcode`@# = @other @def@normalhash{#}
+@catcode`@% = @other @def@normalpercent{%}
+
+@let @hashchar = @normalhash
+
+@c Finally, make ` and ' active, so that txicodequoteundirected and
+@c txicodequotebacktick work right in, e.g., @w{@code{`foo'}}.  If we
+@c don't make ` and ' active, @code will not get them as active chars.
+@c Do this last of all since we use ` in the previous @catcode assignments.
+@catcode`@'=@active
+@catcode`@`=@active
+@setregularquotes
+
+@c Local variables:
+@c eval: (add-hook 'before-save-hook 'time-stamp)
+@c page-delimiter: "^\\\\message\\|emacs-page"
+@c time-stamp-start: "def\\\\texinfoversion{"
+@c time-stamp-format: "%:y-%02m-%02d.%02H"
+@c time-stamp-end: "}"
+@c End:
+
+@c vim:sw=2:
+
+@enablebackslashhack
+
diff --git a/src/grep/build-aux/update-copyright b/src/grep/build-aux/update-copyright
new file mode 100755
index 0000000..fae3a5f
--- /dev/null
+++ b/src/grep/build-aux/update-copyright
@@ -0,0 +1,302 @@
+#!/bin/sh
+#! -*-perl-*-
+
+# Update an FSF copyright year list to include the current year.
+
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+# Written by Jim Meyering and Joel E. Denny
+
+# This script updates an FSF copyright year list to include the current year.
+# Usage: update-copyright [FILE...]
+#
+# The arguments to this script should be names of files that contain
+# copyright statements to be updated.  The copyright holder's name
+# defaults to "Free Software Foundation, Inc." but may be changed to
+# any other name by using the "UPDATE_COPYRIGHT_HOLDER" environment
+# variable.
+#
+# For example, you might wish to use the update-copyright target rule
+# in maint.mk from gnulib's maintainer-makefile module.
+#
+# Iff a copyright statement is recognized in a file and the final
+# year is not the current year, then the statement is updated for the
+# new year and it is reformatted to:
+#
+#   1. Fit within 72 columns.
+#   2. Convert 2-digit years to 4-digit years by prepending "19".
+#   3. Expand copyright year intervals.  (See "Environment variables"
+#      below.)
+#
+# A warning is printed for every file for which no copyright
+# statement is recognized.
+#
+# Each file's copyright statement must be formatted correctly in
+# order to be recognized.  For example, each of these is fine:
+#
+#   Copyright @copyright{} 1990-2005, 2007-2009 Free Software
+#   Foundation, Inc.
+#
+#   # Copyright (C) 1990-2005, 2007-2009 Free Software
+#   # Foundation, Inc.
+#
+#   /*
+#    * Copyright &copy; 90,2005,2007-2009
+#    * Free Software Foundation, Inc.
+#    */
+#
+# However, the following format is not recognized because the line
+# prefix changes after the first line:
+#
+#   ## Copyright (C) 1990-2005, 2007-2009 Free Software
+#   #  Foundation, Inc.
+#
+# However, any correctly formatted copyright statement following
+# a non-matching copyright statements would be recognized.
+#
+# The exact conditions that a file's copyright statement must meet
+# to be recognized are:
+#
+#   1. It is the first copyright statement that meets all of the
+#      following conditions.  Subsequent copyright statements are
+#      ignored.
+#   2. Its format is "Copyright (C)", then a list of copyright years,
+#      and then the name of the copyright holder.
+#   3. The "(C)" takes one of the following forms or is omitted
+#      entirely:
+#
+#        A. (C)
+#        B. (c)
+#        C. @copyright{}
+#        D. &copy;
+#        E. ©
+#
+#   4. The "Copyright" appears at the beginning of a line, except that it
+#      may be prefixed by any sequence (e.g., a comment) of no more than
+#      5 characters -- including white space.
+#   5. Iff such a prefix is present, the same prefix appears at the
+#      beginning of each remaining line within the FSF copyright
+#      statement.  There is one exception in order to support C-style
+#      comments: if the first line's prefix contains nothing but
+#      whitespace surrounding a "/*", then the prefix for all subsequent
+#      lines is the same as the first line's prefix except with each of
+#      "/" and possibly "*" replaced by a " ".  The replacement of "*"
+#      by " " is consistent throughout all subsequent lines.
+#   6. Blank lines, even if preceded by the prefix, do not appear
+#      within the FSF copyright statement.
+#   7. Each copyright year is 2 or 4 digits, and years are separated by
+#      commas, "-", or "--".  Whitespace may appear after commas.
+#
+# Environment variables:
+#
+#   1. If UPDATE_COPYRIGHT_FORCE=1, a recognized FSF copyright statement
+#      is reformatted even if it does not need updating for the new
+#      year.  If unset or set to 0, only updated FSF copyright
+#      statements are reformatted.
+#   2. If UPDATE_COPYRIGHT_USE_INTERVALS=1, every series of consecutive
+#      copyright years (such as 90, 1991, 1992-2007, 2008) in a
+#      reformatted FSF copyright statement is collapsed to a single
+#      interval (such as 1990-2008).  If unset or set to 0, all existing
+#      copyright year intervals in a reformatted FSF copyright statement
+#      are expanded instead.
+#      If UPDATE_COPYRIGHT_USE_INTERVALS=2, convert a sequence with gaps
+#      to the minimal containing range.  For example, convert
+#      2000, 2004-2007, 2009 to 2000-2009.
+#   3. For testing purposes, you can set the assumed current year in
+#      UPDATE_COPYRIGHT_YEAR.
+#   4. The default maximum line length for a copyright line is 72.
+#      Set UPDATE_COPYRIGHT_MAX_LINE_LENGTH to use a different length.
+#   5. Set UPDATE_COPYRIGHT_HOLDER if the copyright holder is other
+#      than "Free Software Foundation, Inc.".
+
+# This is a prologue that allows to run a perl script as an executable
+# on systems that are compliant to a POSIX version before POSIX:2017.
+# On such systems, the usual invocation of an executable through execlp()
+# or execvp() fails with ENOEXEC if it is a script that does not start
+# with a #! line.  The script interpreter mentioned in the #! line has
+# to be /bin/sh, because on GuixSD systems that is the only program that
+# has a fixed file name.  The second line is essential for perl and is
+# also useful for editing this file in Emacs.  The next two lines below
+# are valid code in both sh and perl.  When executed by sh, they re-execute
+# the script through the perl program found in $PATH.  The '-x' option
+# is essential as well; without it, perl would re-execute the script
+# through /bin/sh.  When executed by perl, the next two lines are a no-op.
+eval 'exec perl -wSx -0777 -pi "$0" "$@"'
+     if 0;
+
+my $VERSION = '2020-04-04.15:07'; # UTC
+# The definition above must lie within the first 8 lines in order
+# for the Emacs time-stamp write hook (at end) to update it.
+# If you change this file with Emacs, please let the write hook
+# do its job.  Otherwise, update this string manually.
+
+use strict;
+use warnings;
+
+my $copyright_re = 'Copyright';
+my $circle_c_re = '(?:\([cC]\)|@copyright\{}|\\\\\(co|&copy;|©)';
+my $holder = $ENV{UPDATE_COPYRIGHT_HOLDER};
+$holder ||= 'Free Software Foundation, Inc.';
+my $prefix_max = 5;
+my $margin = $ENV{UPDATE_COPYRIGHT_MAX_LINE_LENGTH};
+!$margin || $margin !~ m/^\d+$/
+  and $margin = 72;
+
+my $tab_width = 8;
+
+my $this_year = $ENV{UPDATE_COPYRIGHT_YEAR};
+if (!$this_year || $this_year !~ m/^\d{4}$/)
+  {
+    my ($sec, $min, $hour, $mday, $month, $year) = localtime (time ());
+    $this_year = $year + 1900;
+  }
+
+# Unless the file consistently uses "\r\n" as the EOL, use "\n" instead.
+my $eol = /(?:^|[^\r])\n/ ? "\n" : "\r\n";
+
+my $leading;
+my $prefix;
+my $ws_re;
+my $stmt_re;
+while (/(^|\n)(.{0,$prefix_max})$copyright_re/g)
+  {
+    $leading = "$1$2";
+    $prefix = $2;
+    if ($prefix =~ /^(\s*\/)\*(\s*)$/)
+      {
+        $prefix =~ s,/, ,;
+        my $prefix_ws = $prefix;
+        $prefix_ws =~ s/\*/ /; # Only whitespace.
+        if (/\G(?:[^*\n]|\*[^\/\n])*\*?\n$prefix_ws/)
+          {
+            $prefix = $prefix_ws;
+          }
+      }
+    $ws_re = '[ \t\r\f]'; # \s without \n
+    $ws_re =
+      "(?:$ws_re*(?:$ws_re|\\n" . quotemeta($prefix) . ")$ws_re*)";
+    my $holder_re = $holder;
+    $holder_re =~ s/\s/$ws_re/g;
+    my $stmt_remainder_re =
+      "(?:$ws_re$circle_c_re)?"
+      . "$ws_re(?:(?:\\d\\d)?\\d\\d(?:,$ws_re?|--?))*"
+      . "((?:\\d\\d)?\\d\\d)$ws_re$holder_re";
+    if (/\G$stmt_remainder_re/)
+      {
+        $stmt_re =
+          quotemeta($leading) . "($copyright_re$stmt_remainder_re)";
+        last;
+      }
+  }
+if (defined $stmt_re)
+  {
+    /$stmt_re/ or die; # Should never die.
+    my $stmt = $1;
+    my $final_year_orig = $2;
+
+    # Handle two-digit year numbers like "98" and "99".
+    my $final_year = $final_year_orig;
+    $final_year <= 99
+      and $final_year += 1900;
+
+    if ($final_year != $this_year)
+      {
+        # Update the year.
+        $stmt =~ s/\b$final_year_orig\b/$final_year, $this_year/;
+      }
+    if ($final_year != $this_year || $ENV{'UPDATE_COPYRIGHT_FORCE'})
+      {
+        # Normalize all whitespace including newline-prefix sequences.
+        $stmt =~ s/$ws_re/ /g;
+
+        # Put spaces after commas.
+        $stmt =~ s/, ?/, /g;
+
+        # Convert 2-digit to 4-digit years.
+        $stmt =~ s/(\b\d\d\b)/19$1/g;
+
+        # Make the use of intervals consistent.
+        if (!$ENV{UPDATE_COPYRIGHT_USE_INTERVALS})
+          {
+            $stmt =~ s/(\d{4})--?(\d{4})/join(', ', $1..$2)/eg;
+          }
+        else
+          {
+            my $ndash = $ARGV =~ /\.tex(i(nfo)?)?$/ ? "--" : "-";
+
+            $stmt =~
+              s/
+                (\d{4})
+                (?:
+                  (,\ |--?)
+                  ((??{
+                    if   ($2 ne ', ') { '\d{4}'; }
+                    elsif (!$3)       { $1 + 1;  }
+                    else              { $3 + 1;  }
+                  }))
+                )+
+              /$1$ndash$3/gx;
+
+            # When it's 2, emit a single range encompassing all year numbers.
+            $ENV{UPDATE_COPYRIGHT_USE_INTERVALS} == 2
+              and $stmt =~ s/\b(\d{4})\b.*\b(\d{4})\b/$1$ndash$2/;
+          }
+
+        # Format within margin.
+        my $stmt_wrapped;
+        my $text_margin = $margin - length($prefix);
+        if ($prefix =~ /^(\t+)/)
+          {
+            $text_margin -= length($1) * ($tab_width - 1);
+          }
+        while (length $stmt)
+          {
+            if (($stmt =~ s/^(.{1,$text_margin})(?: |$)//)
+                || ($stmt =~ s/^([\S]+)(?: |$)//))
+              {
+                my $line = $1;
+                $stmt_wrapped .= $stmt_wrapped ? "$eol$prefix" : $leading;
+                $stmt_wrapped .= $line;
+              }
+            else
+              {
+                # Should be unreachable, but we don't want an infinite
+                # loop if it can be reached.
+                die;
+              }
+          }
+
+        # Replace the old copyright statement.
+        s/$stmt_re/$stmt_wrapped/;
+      }
+  }
+else
+  {
+    print STDERR "$ARGV: warning: copyright statement not found\n";
+  }
+
+# Hey Emacs!
+# Local variables:
+# coding: utf-8
+# mode: perl
+# indent-tabs-mode: nil
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-line-limit: 200
+# time-stamp-start: "my $VERSION = '"
+# time-stamp-format: "%:y-%02m-%02d.%02H:%02M"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "'; # UTC"
+# End:
diff --git a/src/grep/build-aux/useless-if-before-free b/src/grep/build-aux/useless-if-before-free
new file mode 100755
index 0000000..5bbbc44
--- /dev/null
+++ b/src/grep/build-aux/useless-if-before-free
@@ -0,0 +1,240 @@
+#!/bin/sh
+#! -*-perl-*-
+
+# Detect instances of "if (p) free (p);".
+# Likewise "if (p != 0)", "if (0 != p)", or with NULL; and with braces.
+
+# Copyright (C) 2008-2021 Free Software Foundation, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+# Written by Jim Meyering
+
+# This is a prologue that allows to run a perl script as an executable
+# on systems that are compliant to a POSIX version before POSIX:2017.
+# On such systems, the usual invocation of an executable through execlp()
+# or execvp() fails with ENOEXEC if it is a script that does not start
+# with a #! line.  The script interpreter mentioned in the #! line has
+# to be /bin/sh, because on GuixSD systems that is the only program that
+# has a fixed file name.  The second line is essential for perl and is
+# also useful for editing this file in Emacs.  The next two lines below
+# are valid code in both sh and perl.  When executed by sh, they re-execute
+# the script through the perl program found in $PATH.  The '-x' option
+# is essential as well; without it, perl would re-execute the script
+# through /bin/sh.  When executed by perl, the next two lines are a no-op.
+eval 'exec perl -wSx "$0" "$@"'
+     if 0;
+
+my $VERSION = '2021-04-11 10:11'; # UTC
+# The definition above must lie within the first 8 lines in order
+# for the Emacs time-stamp write hook (at end) to update it.
+# If you change this file with Emacs, please let the write hook
+# do its job.  Otherwise, update this string manually.
+
+my $copyright_year = '2021';
+
+use strict;
+use warnings;
+use Getopt::Long;
+
+(my $ME = $0) =~ s|.*/||;
+
+# use File::Coda; # https://meyering.net/code/Coda/
+END {
+  defined fileno STDOUT or return;
+  close STDOUT and return;
+  warn "$ME: failed to close standard output: $!\n";
+  $? ||= 1;
+}
+
+sub usage ($)
+{
+  my ($exit_code) = @_;
+  my $STREAM = ($exit_code == 0 ? *STDOUT : *STDERR);
+  if ($exit_code != 0)
+    {
+      print $STREAM "Try '$ME --help' for more information.\n";
+    }
+  else
+    {
+      print $STREAM <<EOF;
+Usage: $ME [OPTIONS] FILE...
+
+Detect any instance in FILE of a useless "if" test before a free call, e.g.,
+"if (p) free (p);".  Any such test may be safely removed without affecting
+the semantics of the C code in FILE.  Use --name=FOO --name=BAR to also
+detect free-like functions named FOO and BAR.
+
+OPTIONS:
+
+   --list       print only the name of each matching FILE (\\0-terminated)
+   --name=N     add name N to the list of \'free\'-like functions to detect;
+                  may be repeated
+
+   --help       display this help and exit
+   --version    output version information and exit
+
+Exit status:
+
+  0   one or more matches
+  1   no match
+  2   an error
+
+EXAMPLE:
+
+For example, this command prints all removable "if" tests before "free"
+and "kfree" calls in the linux kernel sources:
+
+    git ls-files -z |xargs -0 $ME --name=kfree
+
+EOF
+    }
+  exit $exit_code;
+}
+
+sub is_NULL ($)
+{
+  my ($expr) = @_;
+  return ($expr eq 'NULL' || $expr eq '0');
+}
+
+{
+  sub EXIT_MATCH {0}
+  sub EXIT_NO_MATCH {1}
+  sub EXIT_ERROR {2}
+  my $err = EXIT_NO_MATCH;
+
+  my $list;
+  my @name = qw(free);
+  GetOptions
+    (
+     help => sub { usage 0 },
+     version =>
+       sub
+       {
+         print "$ME version $VERSION\n";
+         print "Copyright (C) $copyright_year Free Software Foundation, Inc.\n";
+         print "License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.\n"
+             . "This is free software: you are free to change and redistribute it.\n"
+             . "There is NO WARRANTY, to the extent permitted by law.\n";
+         print "\n";
+         my $author = "Jim Meyering";
+         print "Written by $author.\n";
+         exit
+       },
+     list => \$list,
+     'name=s@' => \@name,
+    ) or usage 1;
+
+  # Make sure we have the right number of non-option arguments.
+  # Always tell the user why we fail.
+  @ARGV < 1
+    and (warn "$ME: missing FILE argument\n"), usage EXIT_ERROR;
+
+  my $or = join '|', @name;
+  my $regexp = qr/(?:$or)/;
+
+  # Set the input record separator.
+  # Note: this makes it impractical to print line numbers.
+  $/ = '"';
+
+  my $found_match = 0;
+ FILE:
+  foreach my $file (@ARGV)
+    {
+      open FH, '<', $file
+        or (warn "$ME: can't open '$file' for reading: $!\n"),
+          $err = EXIT_ERROR, next;
+      while (defined (my $line = <FH>))
+        {
+          # Skip non-matching lines early to save time
+          $line =~ /\bif\b/
+            or next;
+          while ($line =~
+              /\b(if\s*\(\s*([^)]+?)(?:\s*!=\s*([^)]+?))?\s*\)
+              #  1          2                  3
+               (?:   \s*$regexp\s*\((?:\s*\([^)]+\))?\s*([^)]+)\)\s*;|
+                \s*\{\s*$regexp\s*\((?:\s*\([^)]+\))?\s*([^)]+)\)\s*;\s*\}))/sxg)
+            {
+              my $all = $1;
+              my ($lhs, $rhs) = ($2, $3);
+              my ($free_opnd, $braced_free_opnd) = ($4, $5);
+              my $non_NULL;
+              if (!defined $rhs) { $non_NULL = $lhs }
+              elsif (is_NULL $rhs) { $non_NULL = $lhs }
+              elsif (is_NULL $lhs) { $non_NULL = $rhs }
+              else { next }
+
+              # Compare the non-NULL part of the "if" expression and the
+              # free'd expression, without regard to white space.
+              $non_NULL =~ tr/ \t//d;
+              my $e2 = defined $free_opnd ? $free_opnd : $braced_free_opnd;
+              $e2 =~ tr/ \t//d;
+              if ($non_NULL eq $e2)
+                {
+                  $found_match = 1;
+                  $list
+                    and (print "$file\0"), next FILE;
+                  print "$file: $all\n";
+                }
+            }
+        }
+    }
+  continue
+    {
+      close FH;
+    }
+
+  $found_match && $err == EXIT_NO_MATCH
+    and $err = EXIT_MATCH;
+
+  exit $err;
+}
+
+my $foo = <<'EOF';
+# The above is to *find* them.
+# This adjusts them, removing the unnecessary "if (p)" part.
+
+# FIXME: do something like this as an option (doesn't do braces):
+free=xfree
+git grep -l -z "$free *(" \
+  | xargs -0 useless-if-before-free -l --name="$free" \
+  | xargs -0 perl -0x3b -pi -e \
+   's/\bif\s*\(\s*(\S+?)(?:\s*!=\s*(?:0|NULL))?\s*\)\s+('"$free"'\s*\((?:\s*\([^)]+\))?\s*\1\s*\)\s*;)/$2/s'
+
+# Use the following to remove redundant uses of kfree inside braces.
+# Note that -0777 puts perl in slurp-whole-file mode;
+# but we have plenty of memory, these days...
+free=kfree
+git grep -l -z "$free *(" \
+  | xargs -0 useless-if-before-free -l --name="$free" \
+  | xargs -0 perl -0777 -pi -e \
+     's/\bif\s*\(\s*(\S+?)(?:\s*!=\s*(?:0|NULL))?\s*\)\s*\{\s*('"$free"'\s*\((?:\s*\([^)]+\))?\s*\1\s*\);)\s*\}[^\n]*$/$2/gms'
+
+Be careful that the result of the above transformation is valid.
+If the matched string is followed by "else", then obviously, it won't be.
+
+When modifying files, refuse to process anything other than a regular file.
+EOF
+
+## Local Variables:
+## mode: perl
+## indent-tabs-mode: nil
+## eval: (add-hook 'before-save-hook 'time-stamp)
+## time-stamp-line-limit: 50
+## time-stamp-start: "my $VERSION = '"
+## time-stamp-format: "%:y-%02m-%02d %02H:%02M"
+## time-stamp-time-zone: "UTC0"
+## time-stamp-end: "'; # UTC"
+## End:
diff --git a/src/grep/build-aux/vc-list-files b/src/grep/build-aux/vc-list-files
new file mode 100755
index 0000000..cf168ea
--- /dev/null
+++ b/src/grep/build-aux/vc-list-files
@@ -0,0 +1,113 @@
+#!/bin/sh
+# List version-controlled file names.
+
+# Print a version string.
+scriptversion=2018-03-07.03; # UTC
+
+# Copyright (C) 2006-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+
+# List the specified version-controlled files.
+# With no argument, list them all.  With a single DIRECTORY argument,
+# list the version-controlled files in that directory.
+
+# If there's an argument, it must be a single, "."-relative directory name.
+# cvsu is part of the cvsutils package: https://www.red-bean.com/cvsutils/
+
+postprocess=
+case $1 in
+  --help) cat <<EOF
+Usage: $0 [-C SRCDIR] [DIR...]
+
+Output a list of version-controlled files in DIR (default .), relative to
+SRCDIR (default .).  SRCDIR must be the top directory of a checkout.
+
+Options:
+  --help     print this help, then exit
+  --version  print version number, then exit
+  -C SRCDIR  change directory to SRCDIR before generating list
+
+Report bugs and patches to <bug-gnulib@gnu.org>.
+EOF
+    exit ;;
+
+  --version)
+    year=`echo "$scriptversion" | sed 's/[^0-9].*//'`
+    cat <<EOF
+vc-list-files $scriptversion
+Copyright (C) $year Free Software Foundation, Inc,
+License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
+EOF
+    exit ;;
+
+  -C)
+    test "$2" = . || postprocess="| sed 's|^|$2/|'"
+    cd "$2" || exit 1
+    shift; shift ;;
+esac
+
+test $# = 0 && set .
+
+for dir
+do
+  if test -d .git || test -f .git; then
+    test "x$dir" = x. \
+      && dir= sed_esc= \
+      || { dir="$dir/"; sed_esc=`echo "$dir"|env sed 's,\([\\/]\),\\\\\1,g'`; }
+    # Ignore git symlinks - either they point into the tree, in which case
+    # we don't need to visit the target twice, or they point somewhere
+    # else (often into a submodule), in which case the content does not
+    # belong to this package.
+    eval exec git ls-tree -r 'HEAD:"$dir"' \
+      \| sed -n '"s/^100[^	]*./$sed_esc/p"' $postprocess
+  elif test -d .hg; then
+    eval exec hg locate '"$dir/*"' $postprocess
+  elif test -d .bzr; then
+    test "$postprocess" = '' && postprocess="| sed 's|^\./||'"
+    eval exec bzr ls -R --versioned '"$dir"' $postprocess
+  elif test -d CVS; then
+    test "$postprocess" = '' && postprocess="| sed 's|^\./||'"
+    if test -x build-aux/cvsu; then
+      eval build-aux/cvsu --find --types=AFGM '"$dir"' $postprocess
+    elif (cvsu --help) >/dev/null 2>&1; then
+      eval cvsu --find --types=AFGM '"$dir"' $postprocess
+    else
+      eval awk -F/ \''{			\
+          if (!$1 && $3 !~ /^-/) {	\
+            f=FILENAME;			\
+            if (f ~ /CVS\/Entries$/)	\
+              f = substr(f, 1, length(f)-11); \
+            print f $2;			\
+          }}'\''				\
+        `find "$dir" -name Entries -print` /dev/null' $postprocess
+    fi
+  elif test -d .svn; then
+    eval exec svn list -R '"$dir"' $postprocess
+  else
+    echo "$0: Failed to determine type of version control used in `pwd`" 1>&2
+    exit 1
+  fi
+done
+
+# Local variables:
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/src/grep/cfg.mk b/src/grep/cfg.mk
new file mode 100644
index 0000000..c787434
--- /dev/null
+++ b/src/grep/cfg.mk
@@ -0,0 +1,180 @@
+# Customize maint.mk                           -*- makefile -*-
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# Cause the tool(s) built by this package to be used also when running
+# commands via e.g., "make syntax-check".  Doing this a little sooner
+# would have avoided a grep infloop bug.
+ifeq ($(build_triplet), $(host_triplet))
+export PATH := $(builddir)/src$(PATH_SEPARATOR)$(PATH)
+endif
+
+# Used in maint.mk's web-manual rule
+manual_title = GNU Grep: Print lines matching a pattern
+
+# Use the direct link.  This is guaranteed to work immediately, while
+# it can take a while for the faster mirror links to become usable.
+url_dir_list = https://ftp.gnu.org/gnu/$(PACKAGE)
+
+# Tests not to run as part of "make distcheck".
+local-checks-to-skip =			\
+  sc_texinfo_acronym
+
+# Tools used to bootstrap this package, used for "announcement".
+bootstrap-tools = autoconf,automake,gnulib
+
+# Override the default Cc: used in generating an announcement.
+announcement_Cc_ = $(translation_project_), $(PACKAGE)-devel@gnu.org
+
+# The tight_scope test gets confused about inline functions.
+# like 'to_uchar'.
+_gl_TS_unmarked_extern_functions = main usage mb_clen to_uchar dfaerror dfawarn
+
+# Now that we have better tests, make this the default.
+export VERBOSE = yes
+
+# Comparing tarball sizes compressed using different xz presets, we see
+# that -6e adds only 60 bytes to the size of the tarball, yet reduces
+# (from -9) the decompression memory requirement from 64 MiB to 9 MiB.
+# Don't be tempted by -5e, since -6 and -5 use the same dictionary size.
+# $ for i in {4,5,6,7,8,9}{e,}; do \
+#     (n=$(xz -$i < grep-2.11.tar|wc -c);echo $n $i) & done |sort -nr
+# 1236632 4
+# 1162564 5
+# 1140988 4e
+# 1139620 6
+# 1139480 7
+# 1139480 8
+# 1139480 9
+# 1129552 5e
+# 1127616 6e
+# 1127556 7e
+# 1127556 8e
+# 1127556 9e
+export XZ_OPT = -6e
+
+old_NEWS_hash = da867d7903ff4936e2ee6c173e20fb63
+
+# We prefer to spell it back-reference, as POSIX does.
+sc_prohibit_backref:
+	@prohibit=back''reference					\
+	halt='spell it "back-reference"'				\
+	  $(_sc_search_regexp)
+
+# Many m4 macros names once began with 'jm_'.
+# Make sure that none are inadvertently reintroduced.
+sc_prohibit_jm_in_m4:
+	@grep -nE 'jm_[A-Z]'						\
+		$$($(VC_LIST) m4 |grep '\.m4$$'; echo /dev/null) &&	\
+	    { echo '$(ME): do not use jm_ in m4 macro names'		\
+	      1>&2; exit 1; } || :
+
+sc_prohibit_echo_minus_en:
+	@prohibit='\<echo -[en]'					\
+	halt='do not use echo ''-e or echo ''-n; use printf instead'	\
+	  $(_sc_search_regexp)
+
+# Look for lines longer than 80 characters, except omit:
+# - program-generated long lines in diff headers,
+# - the help2man script copied from upstream,
+# - tests involving long checksum lines, and
+# - the 'pr' test cases.
+LINE_LEN_MAX = 80
+FILTER_LONG_LINES =							\
+  /^[^:]*\.diff:[^:]*:@@ / d;						\
+  \|^[^:]*TODO:| d;							\
+  \|^[^:]*man/help2man:| d;						\
+  \|^[^:]*tests/misc/sha[0-9]*sum.*\.pl[-:]| d;				\
+  \|^[^:]*tests/pr/|{ \|^[^:]*tests/pr/pr-tests:| !d; };
+sc_long_lines:
+	@files=$$($(VC_LIST_EXCEPT))					\
+	halt='line(s) with more than $(LINE_LEN_MAX) characters; reindent'; \
+	for file in $$files; do						\
+	  expand $$file | grep -nE '^.{$(LINE_LEN_MAX)}.' |		\
+	  sed -e "s|^|$$file:|" -e '$(FILTER_LONG_LINES)';		\
+	done | grep . && { msg="$$halt" $(_sc_say_and_exit) } || :
+
+# Indent only with spaces.
+sc_prohibit_tab_based_indentation:
+	@prohibit='^ *	'						\
+	halt='TAB in indentation; use only spaces'			\
+	  $(_sc_search_regexp)
+
+# Don't use "indent-tabs-mode: nil" anymore.  No longer needed.
+sc_prohibit_emacs__indent_tabs_mode__setting:
+	@prohibit='^( *[*#] *)?indent-tabs-mode:'			\
+	halt='use of emacs indent-tabs-mode: setting'			\
+	  $(_sc_search_regexp)
+
+# Ensure that the list of test file names in tests/Makefile.am is sorted.
+sc_sorted_tests:
+	@perl -0777 -ne \
+	    '/^TESTS =(.*?)^$$/ms; ($$t = $$1) =~ s/[\\\s\n]+/\n/g;print $$t' \
+	  tests/Makefile.am | sort -c
+
+# THANKS.in is a list of name/email pairs for people who are mentioned in
+# commit logs (and generated ChangeLog), but who are not also listed as an
+# author of a commit.  Name/email pairs of commit authors are automatically
+# extracted from the repository.  As a very minor factorization, when
+# someone who was initially listed only in THANKS.in later authors a commit,
+# this rule detects that their pair may now be removed from THANKS.in.
+sc_THANKS_in_duplicates:
+	@{ git log --pretty=format:%aN | sort -u;			\
+	    cut -b-36 THANKS.in | sed '/^$$/d;s/  *$$//'; }		\
+	  | sort | uniq -d | grep .					\
+	    && { echo '$(ME): remove the above names from THANKS.in'	\
+		  1>&2; exit 1; } || :
+
+# Ensure that tests don't use `cmd ... && fail=1` as that hides crashes.
+# The "exclude" expression allows common idioms like `test ... && fail=1`
+# and the 2>... portion allows commands that redirect stderr and so probably
+# independently check its contents and thus detect any crash messages.
+sc_prohibit_and_fail_1:
+	@prohibit='&& fail=1'						\
+	exclude='(stat|kill|test |EGREP|grep|compare|2> *[^/])'		\
+	halt='&& fail=1 detected. Please use: returns_ 1 ... || fail=1'	\
+	in_vc_files='^tests/'						\
+	  $(_sc_search_regexp)
+
+update-copyright-env = \
+  UPDATE_COPYRIGHT_USE_INTERVALS=1 \
+  UPDATE_COPYRIGHT_MAX_LINE_LENGTH=79
+
+include $(abs_top_srcdir)/dist-check.mk
+
+exclude_file_name_regexp--sc_bindtextdomain = \
+  ^tests/get-mb-cur-max\.c$$
+
+exclude_file_name_regexp--sc_prohibit_strcmp = /colorize-.*\.c$$
+exclude_file_name_regexp--sc_prohibit_xalloc_without_use = ^src/kwset\.c$$
+exclude_file_name_regexp--sc_prohibit_tab_based_indentation = \
+  (Makefile|\.(am|mk)$$)
+
+exclude_file_name_regexp--sc_prohibit_doubled_word = ^tests/count-newline$$
+
+exclude_file_name_regexp--sc_long_lines = ^tests/.*$$
+
+# If a test uses timeout, it must also use require_timeout_.
+# Grandfather-exempt the fedora test, since it ensures timeout works
+# as expected before using it.
+sc_timeout_prereq:
+	@$(VC_LIST_EXCEPT)						\
+	  | grep '^tests/'						\
+	  | grep -v '^tests/fedora$$'					\
+	  | xargs grep -lw timeout					\
+	  | xargs grep -FLw require_timeout_				\
+	  | $(GREP) .							\
+	  && { echo '$(ME): timeout withtout use of require_timeout_'	\
+	    1>&2; exit 1; } || :
diff --git a/src/grep/config.hin b/src/grep/config.hin
new file mode 100644
index 0000000..565f63b
--- /dev/null
+++ b/src/grep/config.hin
@@ -0,0 +1,2464 @@
+/* config.hin.  Generated from configure.ac by autoheader.  */
+
+/* CPU and C ABI indicator */
+#ifndef __i386__
+#undef __i386__
+#endif
+#ifndef __x86_64_x32__
+#undef __x86_64_x32__
+#endif
+#ifndef __x86_64__
+#undef __x86_64__
+#endif
+#ifndef __alpha__
+#undef __alpha__
+#endif
+#ifndef __arm__
+#undef __arm__
+#endif
+#ifndef __armhf__
+#undef __armhf__
+#endif
+#ifndef __arm64_ilp32__
+#undef __arm64_ilp32__
+#endif
+#ifndef __arm64__
+#undef __arm64__
+#endif
+#ifndef __hppa__
+#undef __hppa__
+#endif
+#ifndef __hppa64__
+#undef __hppa64__
+#endif
+#ifndef __ia64_ilp32__
+#undef __ia64_ilp32__
+#endif
+#ifndef __ia64__
+#undef __ia64__
+#endif
+#ifndef __m68k__
+#undef __m68k__
+#endif
+#ifndef __mips__
+#undef __mips__
+#endif
+#ifndef __mipsn32__
+#undef __mipsn32__
+#endif
+#ifndef __mips64__
+#undef __mips64__
+#endif
+#ifndef __powerpc__
+#undef __powerpc__
+#endif
+#ifndef __powerpc64__
+#undef __powerpc64__
+#endif
+#ifndef __powerpc64_elfv2__
+#undef __powerpc64_elfv2__
+#endif
+#ifndef __riscv32__
+#undef __riscv32__
+#endif
+#ifndef __riscv64__
+#undef __riscv64__
+#endif
+#ifndef __riscv32_ilp32__
+#undef __riscv32_ilp32__
+#endif
+#ifndef __riscv32_ilp32f__
+#undef __riscv32_ilp32f__
+#endif
+#ifndef __riscv32_ilp32d__
+#undef __riscv32_ilp32d__
+#endif
+#ifndef __riscv64_ilp32__
+#undef __riscv64_ilp32__
+#endif
+#ifndef __riscv64_ilp32f__
+#undef __riscv64_ilp32f__
+#endif
+#ifndef __riscv64_ilp32d__
+#undef __riscv64_ilp32d__
+#endif
+#ifndef __riscv64_lp64__
+#undef __riscv64_lp64__
+#endif
+#ifndef __riscv64_lp64f__
+#undef __riscv64_lp64f__
+#endif
+#ifndef __riscv64_lp64d__
+#undef __riscv64_lp64d__
+#endif
+#ifndef __s390__
+#undef __s390__
+#endif
+#ifndef __s390x__
+#undef __s390x__
+#endif
+#ifndef __sh__
+#undef __sh__
+#endif
+#ifndef __sparc__
+#undef __sparc__
+#endif
+#ifndef __sparc64__
+#undef __sparc64__
+#endif
+
+
+/* Define if building universal (internal helper macro) */
+#undef AC_APPLE_UNIVERSAL_BUILD
+
+/* Define to the function xargmatch calls on failures. */
+#undef ARGMATCH_DIE
+
+/* Define to the declaration of the xargmatch failure function. */
+#undef ARGMATCH_DIE_DECL
+
+/* Define to the number of bits in type 'ptrdiff_t'. */
+#undef BITSIZEOF_PTRDIFF_T
+
+/* Define to the number of bits in type 'sig_atomic_t'. */
+#undef BITSIZEOF_SIG_ATOMIC_T
+
+/* Define to the number of bits in type 'size_t'. */
+#undef BITSIZEOF_SIZE_T
+
+/* Define to the number of bits in type 'wchar_t'. */
+#undef BITSIZEOF_WCHAR_T
+
+/* Define to the number of bits in type 'wint_t'. */
+#undef BITSIZEOF_WINT_T
+
+/* Define to 1 if the `closedir' function returns void instead of int. */
+#undef CLOSEDIR_VOID
+
+/* Define to 1 if using 'alloca.c'. */
+#undef C_ALLOCA
+
+/* Define as the bit index in the word where to find bit 0 of the exponent of
+   'double'. */
+#undef DBL_EXPBIT0_BIT
+
+/* Define as the word index where to find the exponent of 'double'. */
+#undef DBL_EXPBIT0_WORD
+
+/* the name of the file descriptor member of DIR */
+#undef DIR_FD_MEMBER_NAME
+
+#ifdef DIR_FD_MEMBER_NAME
+# define DIR_TO_FD(Dir_p) ((Dir_p)->DIR_FD_MEMBER_NAME)
+#else
+# define DIR_TO_FD(Dir_p) -1
+#endif
+
+
+/* Define to 1 if // is a file system root distinct from /. */
+#undef DOUBLE_SLASH_IS_DISTINCT_ROOT
+
+/* Define if struct dirent has a member d_ino that actually works. */
+#undef D_INO_IN_DIRENT
+
+/* Define to 1 if translation of program messages to the user's native
+   language is requested. */
+#undef ENABLE_NLS
+
+/* Define this to 1 if F_DUPFD behavior does not match POSIX */
+#undef FCNTL_DUPFD_BUGGY
+
+/* Define to nothing if C supports flexible array members, and to 1 if it does
+   not. That way, with a declaration like 'struct s { int n; short
+   d[FLEXIBLE_ARRAY_MEMBER]; };', the struct hack can be used with pre-C99
+   compilers. Use 'FLEXSIZEOF (struct s, d, N * sizeof (short))' to calculate
+   the size in bytes of such a struct containing an N-element array. */
+#undef FLEXIBLE_ARRAY_MEMBER
+
+/* Define to 1 if fopen() fails to recognize a trailing slash. */
+#undef FOPEN_TRAILING_SLASH_BUG
+
+/* Define to 1 if nl_langinfo (YESEXPR) returns a non-empty string. */
+#undef FUNC_NL_LANGINFO_YESEXPR_WORKS
+
+/* Define this to 'void' or 'struct timezone' to match the system's
+   declaration of the second argument to gettimeofday. */
+#undef GETTIMEOFDAY_TIMEZONE
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module close-stream shall be considered present. */
+#undef GNULIB_CLOSE_STREAM
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module fcntl-safer shall be considered present. */
+#undef GNULIB_FCNTL_SAFER
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module fdopendir shall be considered present. */
+#undef GNULIB_FDOPENDIR
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module fd-safer-flag shall be considered present. */
+#undef GNULIB_FD_SAFER_FLAG
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module fopen-gnu shall be considered present. */
+#undef GNULIB_FOPEN_GNU
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module fscanf shall be considered present. */
+#undef GNULIB_FSCANF
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module isblank shall be considered present. */
+#undef GNULIB_ISBLANK
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module lock shall be considered present. */
+#undef GNULIB_LOCK
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module msvc-nothrow shall be considered present. */
+#undef GNULIB_MSVC_NOTHROW
+
+/* Define to 1 to disable use of VLAs */
+#undef GNULIB_NO_VLA
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module openat shall be considered present. */
+#undef GNULIB_OPENAT
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module openat-safer shall be considered present. */
+#undef GNULIB_OPENAT_SAFER
+
+/* enable some gnulib portability checks */
+#undef GNULIB_PORTCHECK
+
+/* Enable compile-time and run-time bounds-checking, and some warnings,
+      without upsetting glibc 2.15+. */
+   #if (defined GNULIB_PORTCHECK && !defined _FORTIFY_SOURCE \
+        && defined __OPTIMIZE__ && __OPTIMIZE__)
+   # define _FORTIFY_SOURCE 2
+   #endif
+  
+
+/* Define to 1 if printf and friends should be labeled with attribute
+   "__gnu_printf__" instead of "__printf__" */
+#undef GNULIB_PRINTF_ATTRIBUTE_FLAVOR_GNU
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module reallocarray shall be considered present. */
+#undef GNULIB_REALLOCARRAY
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module scanf shall be considered present. */
+#undef GNULIB_SCANF
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module snprintf shall be considered present. */
+#undef GNULIB_SNPRINTF
+
+/* Define to 1 if you want the FILE stream functions getc, putc, etc. to use
+   unlocked I/O if available, throughout the package. Unlocked I/O can improve
+   performance, sometimes dramatically. But unlocked I/O is safe only in
+   single-threaded programs, as well as in multithreaded programs for which
+   you can guarantee that every FILE stream, including stdin, stdout, stderr,
+   is used only in a single thread. */
+#undef GNULIB_STDIO_SINGLE_THREAD
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module strerror shall be considered present. */
+#undef GNULIB_STRERROR
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module strerror_r-posix shall be considered present. */
+#undef GNULIB_STRERROR_R_POSIX
+
+/* Define to 1 when the gnulib module accept should be tested. */
+#undef GNULIB_TEST_ACCEPT
+
+/* Define to 1 when the gnulib module bind should be tested. */
+#undef GNULIB_TEST_BIND
+
+/* Define to 1 when the gnulib module btowc should be tested. */
+#undef GNULIB_TEST_BTOWC
+
+/* Define to 1 when the gnulib module calloc-posix should be tested. */
+#undef GNULIB_TEST_CALLOC_POSIX
+
+/* Define to 1 when the gnulib module chdir should be tested. */
+#undef GNULIB_TEST_CHDIR
+
+/* Define to 1 when the gnulib module cloexec should be tested. */
+#undef GNULIB_TEST_CLOEXEC
+
+/* Define to 1 when the gnulib module close should be tested. */
+#undef GNULIB_TEST_CLOSE
+
+/* Define to 1 when the gnulib module closedir should be tested. */
+#undef GNULIB_TEST_CLOSEDIR
+
+/* Define to 1 when the gnulib module connect should be tested. */
+#undef GNULIB_TEST_CONNECT
+
+/* Define to 1 when the gnulib module dirfd should be tested. */
+#undef GNULIB_TEST_DIRFD
+
+/* Define to 1 when the gnulib module dup should be tested. */
+#undef GNULIB_TEST_DUP
+
+/* Define to 1 when the gnulib module dup2 should be tested. */
+#undef GNULIB_TEST_DUP2
+
+/* Define to 1 when the gnulib module environ should be tested. */
+#undef GNULIB_TEST_ENVIRON
+
+/* Define to 1 when the gnulib module fchdir should be tested. */
+#undef GNULIB_TEST_FCHDIR
+
+/* Define to 1 when the gnulib module fcntl should be tested. */
+#undef GNULIB_TEST_FCNTL
+
+/* Define to 1 when the gnulib module fdopen should be tested. */
+#undef GNULIB_TEST_FDOPEN
+
+/* Define to 1 when the gnulib module fdopendir should be tested. */
+#undef GNULIB_TEST_FDOPENDIR
+
+/* Define to 1 when the gnulib module fgetc should be tested. */
+#undef GNULIB_TEST_FGETC
+
+/* Define to 1 when the gnulib module fgets should be tested. */
+#undef GNULIB_TEST_FGETS
+
+/* Define to 1 when the gnulib module fnmatch should be tested. */
+#undef GNULIB_TEST_FNMATCH
+
+/* Define to 1 when the gnulib module fopen should be tested. */
+#undef GNULIB_TEST_FOPEN
+
+/* Define to 1 when the gnulib module fprintf should be tested. */
+#undef GNULIB_TEST_FPRINTF
+
+/* Define to 1 when the gnulib module fputc should be tested. */
+#undef GNULIB_TEST_FPUTC
+
+/* Define to 1 when the gnulib module fputs should be tested. */
+#undef GNULIB_TEST_FPUTS
+
+/* Define to 1 when the gnulib module fread should be tested. */
+#undef GNULIB_TEST_FREAD
+
+/* Define to 1 when the gnulib module free-posix should be tested. */
+#undef GNULIB_TEST_FREE_POSIX
+
+/* Define to 1 when the gnulib module fscanf should be tested. */
+#undef GNULIB_TEST_FSCANF
+
+/* Define to 1 when the gnulib module fstat should be tested. */
+#undef GNULIB_TEST_FSTAT
+
+/* Define to 1 when the gnulib module fstatat should be tested. */
+#undef GNULIB_TEST_FSTATAT
+
+/* Define to 1 when the gnulib module ftruncate should be tested. */
+#undef GNULIB_TEST_FTRUNCATE
+
+/* Define to 1 when the gnulib module fwrite should be tested. */
+#undef GNULIB_TEST_FWRITE
+
+/* Define to 1 when the gnulib module getc should be tested. */
+#undef GNULIB_TEST_GETC
+
+/* Define to 1 when the gnulib module getchar should be tested. */
+#undef GNULIB_TEST_GETCHAR
+
+/* Define to 1 when the gnulib module getcwd should be tested. */
+#undef GNULIB_TEST_GETCWD
+
+/* Define to 1 when the gnulib module getdtablesize should be tested. */
+#undef GNULIB_TEST_GETDTABLESIZE
+
+/* Define to 1 when the gnulib module getopt-posix should be tested. */
+#undef GNULIB_TEST_GETOPT_POSIX
+
+/* Define to 1 when the gnulib module getpagesize should be tested. */
+#undef GNULIB_TEST_GETPAGESIZE
+
+/* Define to 1 when the gnulib module gettimeofday should be tested. */
+#undef GNULIB_TEST_GETTIMEOFDAY
+
+/* Define to 1 when the gnulib module ioctl should be tested. */
+#undef GNULIB_TEST_IOCTL
+
+/* Define to 1 when the gnulib module isatty should be tested. */
+#undef GNULIB_TEST_ISATTY
+
+/* Define to 1 when the gnulib module iswblank should be tested. */
+#undef GNULIB_TEST_ISWBLANK
+
+/* Define to 1 when the gnulib module iswctype should be tested. */
+#undef GNULIB_TEST_ISWCTYPE
+
+/* Define to 1 when the gnulib module iswdigit should be tested. */
+#undef GNULIB_TEST_ISWDIGIT
+
+/* Define to 1 when the gnulib module iswxdigit should be tested. */
+#undef GNULIB_TEST_ISWXDIGIT
+
+/* Define to 1 when the gnulib module listen should be tested. */
+#undef GNULIB_TEST_LISTEN
+
+/* Define to 1 when the gnulib module localeconv should be tested. */
+#undef GNULIB_TEST_LOCALECONV
+
+/* Define to 1 when the gnulib module localename should be tested. */
+#undef GNULIB_TEST_LOCALENAME
+
+/* Define to 1 when the gnulib module lseek should be tested. */
+#undef GNULIB_TEST_LSEEK
+
+/* Define to 1 when the gnulib module lstat should be tested. */
+#undef GNULIB_TEST_LSTAT
+
+/* Define to 1 when the gnulib module malloc-posix should be tested. */
+#undef GNULIB_TEST_MALLOC_POSIX
+
+/* Define to 1 when the gnulib module mbrlen should be tested. */
+#undef GNULIB_TEST_MBRLEN
+
+/* Define to 1 when the gnulib module mbrtowc should be tested. */
+#undef GNULIB_TEST_MBRTOWC
+
+/* Define to 1 when the gnulib module mbscasecmp should be tested. */
+#undef GNULIB_TEST_MBSCASECMP
+
+/* Define to 1 when the gnulib module mbsinit should be tested. */
+#undef GNULIB_TEST_MBSINIT
+
+/* Define to 1 when the gnulib module mbslen should be tested. */
+#undef GNULIB_TEST_MBSLEN
+
+/* Define to 1 when the gnulib module mbsrtowcs should be tested. */
+#undef GNULIB_TEST_MBSRTOWCS
+
+/* Define to 1 when the gnulib module mbsstr should be tested. */
+#undef GNULIB_TEST_MBSSTR
+
+/* Define to 1 when the gnulib module mbtowc should be tested. */
+#undef GNULIB_TEST_MBTOWC
+
+/* Define to 1 when the gnulib module memchr should be tested. */
+#undef GNULIB_TEST_MEMCHR
+
+/* Define to 1 when the gnulib module mempcpy should be tested. */
+#undef GNULIB_TEST_MEMPCPY
+
+/* Define to 1 when the gnulib module memrchr should be tested. */
+#undef GNULIB_TEST_MEMRCHR
+
+/* Define to 1 when the gnulib module nanosleep should be tested. */
+#undef GNULIB_TEST_NANOSLEEP
+
+/* Define to 1 when the gnulib module nl_langinfo should be tested. */
+#undef GNULIB_TEST_NL_LANGINFO
+
+/* Define to 1 when the gnulib module open should be tested. */
+#undef GNULIB_TEST_OPEN
+
+/* Define to 1 when the gnulib module openat should be tested. */
+#undef GNULIB_TEST_OPENAT
+
+/* Define to 1 when the gnulib module opendir should be tested. */
+#undef GNULIB_TEST_OPENDIR
+
+/* Define to 1 when the gnulib module perror should be tested. */
+#undef GNULIB_TEST_PERROR
+
+/* Define to 1 when the gnulib module pipe should be tested. */
+#undef GNULIB_TEST_PIPE
+
+/* Define to 1 when the gnulib module printf should be tested. */
+#undef GNULIB_TEST_PRINTF
+
+/* Define to 1 when the gnulib module pthread_sigmask should be tested. */
+#undef GNULIB_TEST_PTHREAD_SIGMASK
+
+/* Define to 1 when the gnulib module pthread-thread should be tested. */
+#undef GNULIB_TEST_PTHREAD_THREAD
+
+/* Define to 1 when the gnulib module putc should be tested. */
+#undef GNULIB_TEST_PUTC
+
+/* Define to 1 when the gnulib module putchar should be tested. */
+#undef GNULIB_TEST_PUTCHAR
+
+/* Define to 1 when the gnulib module putenv should be tested. */
+#undef GNULIB_TEST_PUTENV
+
+/* Define to 1 when the gnulib module puts should be tested. */
+#undef GNULIB_TEST_PUTS
+
+/* Define to 1 when the gnulib module raise should be tested. */
+#undef GNULIB_TEST_RAISE
+
+/* Define to 1 when the gnulib module rawmemchr should be tested. */
+#undef GNULIB_TEST_RAWMEMCHR
+
+/* Define to 1 when the gnulib module read should be tested. */
+#undef GNULIB_TEST_READ
+
+/* Define to 1 when the gnulib module readdir should be tested. */
+#undef GNULIB_TEST_READDIR
+
+/* Define to 1 when the gnulib module reallocarray should be tested. */
+#undef GNULIB_TEST_REALLOCARRAY
+
+/* Define to 1 when the gnulib module realloc-posix should be tested. */
+#undef GNULIB_TEST_REALLOC_POSIX
+
+/* Define to 1 when the gnulib module scanf should be tested. */
+#undef GNULIB_TEST_SCANF
+
+/* Define to 1 when the gnulib module select should be tested. */
+#undef GNULIB_TEST_SELECT
+
+/* Define to 1 when the gnulib module setenv should be tested. */
+#undef GNULIB_TEST_SETENV
+
+/* Define to 1 when the gnulib module setlocale should be tested. */
+#undef GNULIB_TEST_SETLOCALE
+
+/* Define to 1 when the gnulib module setlocale_null should be tested. */
+#undef GNULIB_TEST_SETLOCALE_NULL
+
+/* Define to 1 when the gnulib module setsockopt should be tested. */
+#undef GNULIB_TEST_SETSOCKOPT
+
+/* Define to 1 when the gnulib module sigaction should be tested. */
+#undef GNULIB_TEST_SIGACTION
+
+/* Define to 1 when the gnulib module sigprocmask should be tested. */
+#undef GNULIB_TEST_SIGPROCMASK
+
+/* Define to 1 when the gnulib module sleep should be tested. */
+#undef GNULIB_TEST_SLEEP
+
+/* Define to 1 when the gnulib module snprintf should be tested. */
+#undef GNULIB_TEST_SNPRINTF
+
+/* Define to 1 when the gnulib module socket should be tested. */
+#undef GNULIB_TEST_SOCKET
+
+/* Define to 1 when the gnulib module stat should be tested. */
+#undef GNULIB_TEST_STAT
+
+/* Define to 1 when the gnulib module stpcpy should be tested. */
+#undef GNULIB_TEST_STPCPY
+
+/* Define to 1 when the gnulib module strdup should be tested. */
+#undef GNULIB_TEST_STRDUP
+
+/* Define to 1 when the gnulib module strerror should be tested. */
+#undef GNULIB_TEST_STRERROR
+
+/* Define to 1 when the gnulib module strerror_r should be tested. */
+#undef GNULIB_TEST_STRERROR_R
+
+/* Define to 1 when the gnulib module strnlen should be tested. */
+#undef GNULIB_TEST_STRNLEN
+
+/* Define to 1 when the gnulib module strstr should be tested. */
+#undef GNULIB_TEST_STRSTR
+
+/* Define to 1 when the gnulib module strtoll should be tested. */
+#undef GNULIB_TEST_STRTOLL
+
+/* Define to 1 when the gnulib module strtoull should be tested. */
+#undef GNULIB_TEST_STRTOULL
+
+/* Define to 1 when the gnulib module symlink should be tested. */
+#undef GNULIB_TEST_SYMLINK
+
+/* Define to 1 when the gnulib module unsetenv should be tested. */
+#undef GNULIB_TEST_UNSETENV
+
+/* Define to 1 when the gnulib module vfprintf should be tested. */
+#undef GNULIB_TEST_VFPRINTF
+
+/* Define to 1 when the gnulib module vprintf should be tested. */
+#undef GNULIB_TEST_VPRINTF
+
+/* Define to 1 when the gnulib module wcrtomb should be tested. */
+#undef GNULIB_TEST_WCRTOMB
+
+/* Define to 1 when the gnulib module wctob should be tested. */
+#undef GNULIB_TEST_WCTOB
+
+/* Define to 1 when the gnulib module wctomb should be tested. */
+#undef GNULIB_TEST_WCTOMB
+
+/* Define to 1 when the gnulib module wcwidth should be tested. */
+#undef GNULIB_TEST_WCWIDTH
+
+/* Define to 1 when the gnulib module wmemchr should be tested. */
+#undef GNULIB_TEST_WMEMCHR
+
+/* Define to 1 when the gnulib module wmempcpy should be tested. */
+#undef GNULIB_TEST_WMEMPCPY
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module unistr/u8-mbtoucr shall be considered present. */
+#undef GNULIB_UNISTR_U8_MBTOUCR
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module unistr/u8-uctomb shall be considered present. */
+#undef GNULIB_UNISTR_U8_UCTOMB
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module xalloc shall be considered present. */
+#undef GNULIB_XALLOC
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module xalloc-die shall be considered present. */
+#undef GNULIB_XALLOC_DIE
+
+/* We are building grep */
+#undef GREP
+
+/* Define to 1 if you have 'alloca' after including <alloca.h>, a header that
+   may be supplied by this distribution. */
+#undef HAVE_ALLOCA
+
+/* Define to 1 if <alloca.h> works. */
+#undef HAVE_ALLOCA_H
+
+/* Define to 1 if you have the <arpa/inet.h> header file. */
+#undef HAVE_ARPA_INET_H
+
+/* Define to 1 if you have the <bp-sym.h> header file. */
+#undef HAVE_BP_SYM_H
+
+/* Define to 1 if you have the `btowc' function. */
+#undef HAVE_BTOWC
+
+/* Define to 1 if nanosleep mishandles large arguments. */
+#undef HAVE_BUG_BIG_NANOSLEEP
+
+/* Define to 1 if you have the `catgets' function. */
+#undef HAVE_CATGETS
+
+/* Define to 1 if you have the Mac OS X function
+   CFLocaleCopyPreferredLanguages in the CoreFoundation framework. */
+#undef HAVE_CFLOCALECOPYPREFERREDLANGUAGES
+
+/* Define to 1 if you have the Mac OS X function CFPreferencesCopyAppValue in
+   the CoreFoundation framework. */
+#undef HAVE_CFPREFERENCESCOPYAPPVALUE
+
+/* Define to 1 if you have the `closedir' function. */
+#undef HAVE_CLOSEDIR
+
+/* Define to 1 if you have the <crtdefs.h> header file. */
+#undef HAVE_CRTDEFS_H
+
+/* Define if the GNU dcgettext() function is already present or preinstalled.
+   */
+#undef HAVE_DCGETTEXT
+
+/* Define to 1 if you have the declaration of `alarm', and to 0 if you don't.
+   */
+#undef HAVE_DECL_ALARM
+
+/* Define to 1 if you have the declaration of `clearerr_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_CLEARERR_UNLOCKED
+
+/* Define to 1 if you have the declaration of `dirfd', and to 0 if you don't.
+   */
+#undef HAVE_DECL_DIRFD
+
+/* Define to 1 if you have the declaration of `ecvt', and to 0 if you don't.
+   */
+#undef HAVE_DECL_ECVT
+
+/* Define to 1 if you have the declaration of `execvpe', and to 0 if you
+   don't. */
+#undef HAVE_DECL_EXECVPE
+
+/* Define to 1 if you have the declaration of `fchdir', and to 0 if you don't.
+   */
+#undef HAVE_DECL_FCHDIR
+
+/* Define to 1 if you have the declaration of `fcloseall', and to 0 if you
+   don't. */
+#undef HAVE_DECL_FCLOSEALL
+
+/* Define to 1 if you have the declaration of `fcvt', and to 0 if you don't.
+   */
+#undef HAVE_DECL_FCVT
+
+/* Define to 1 if you have the declaration of `fdopendir', and to 0 if you
+   don't. */
+#undef HAVE_DECL_FDOPENDIR
+
+/* Define to 1 if you have the declaration of `feof_unlocked', and to 0 if you
+   don't. */
+#undef HAVE_DECL_FEOF_UNLOCKED
+
+/* Define to 1 if you have the declaration of `ferror_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_FERROR_UNLOCKED
+
+/* Define to 1 if you have the declaration of `fflush_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_FFLUSH_UNLOCKED
+
+/* Define to 1 if you have the declaration of `fgets_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_FGETS_UNLOCKED
+
+/* Define to 1 if you have the declaration of `fputc_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_FPUTC_UNLOCKED
+
+/* Define to 1 if you have the declaration of `fputs_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_FPUTS_UNLOCKED
+
+/* Define to 1 if you have the declaration of `fread_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_FREAD_UNLOCKED
+
+/* Define to 1 if you have the declaration of `fwrite_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_FWRITE_UNLOCKED
+
+/* Define to 1 if you have the declaration of `gcvt', and to 0 if you don't.
+   */
+#undef HAVE_DECL_GCVT
+
+/* Define to 1 if you have the declaration of `getchar_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_GETCHAR_UNLOCKED
+
+/* Define to 1 if you have the declaration of `getc_unlocked', and to 0 if you
+   don't. */
+#undef HAVE_DECL_GETC_UNLOCKED
+
+/* Define to 1 if you have the declaration of `getdtablesize', and to 0 if you
+   don't. */
+#undef HAVE_DECL_GETDTABLESIZE
+
+/* Define to 1 if you have the declaration of `inet_pton', and to 0 if you
+   don't. */
+#undef HAVE_DECL_INET_PTON
+
+/* Define to 1 if you have the declaration of `isblank', and to 0 if you
+   don't. */
+#undef HAVE_DECL_ISBLANK
+
+/* Define to 1 if you have the declaration of `iswblank', and to 0 if you
+   don't. */
+#undef HAVE_DECL_ISWBLANK
+
+/* Define to 1 if you have the declaration of `mbrlen', and to 0 if you don't.
+   */
+#undef HAVE_DECL_MBRLEN
+
+/* Define to 1 if you have the declaration of `mbrtowc', and to 0 if you
+   don't. */
+#undef HAVE_DECL_MBRTOWC
+
+/* Define to 1 if you have the declaration of `mbsinit', and to 0 if you
+   don't. */
+#undef HAVE_DECL_MBSINIT
+
+/* Define to 1 if you have the declaration of `mbsrtowcs', and to 0 if you
+   don't. */
+#undef HAVE_DECL_MBSRTOWCS
+
+/* Define to 1 if you have the declaration of `memrchr', and to 0 if you
+   don't. */
+#undef HAVE_DECL_MEMRCHR
+
+/* Define to 1 if you have the declaration of `program_invocation_name', and
+   to 0 if you don't. */
+#undef HAVE_DECL_PROGRAM_INVOCATION_NAME
+
+/* Define to 1 if you have the declaration of `program_invocation_short_name',
+   and to 0 if you don't. */
+#undef HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME
+
+/* Define to 1 if you have the declaration of `putchar_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_PUTCHAR_UNLOCKED
+
+/* Define to 1 if you have the declaration of `putc_unlocked', and to 0 if you
+   don't. */
+#undef HAVE_DECL_PUTC_UNLOCKED
+
+/* Define to 1 if you have the declaration of `setenv', and to 0 if you don't.
+   */
+#undef HAVE_DECL_SETENV
+
+/* Define to 1 if you have the declaration of `sleep', and to 0 if you don't.
+   */
+#undef HAVE_DECL_SLEEP
+
+/* Define to 1 if you have the declaration of `snprintf', and to 0 if you
+   don't. */
+#undef HAVE_DECL_SNPRINTF
+
+/* Define to 1 if you have the declaration of `strdup', and to 0 if you don't.
+   */
+#undef HAVE_DECL_STRDUP
+
+/* Define to 1 if you have the declaration of `strerror_r', and to 0 if you
+   don't. */
+#undef HAVE_DECL_STRERROR_R
+
+/* Define to 1 if you have the declaration of `strnlen', and to 0 if you
+   don't. */
+#undef HAVE_DECL_STRNLEN
+
+/* Define to 1 if you have the declaration of `strtoimax', and to 0 if you
+   don't. */
+#undef HAVE_DECL_STRTOIMAX
+
+/* Define to 1 if you have the declaration of `strtoll', and to 0 if you
+   don't. */
+#undef HAVE_DECL_STRTOLL
+
+/* Define to 1 if you have the declaration of `strtoull', and to 0 if you
+   don't. */
+#undef HAVE_DECL_STRTOULL
+
+/* Define to 1 if you have the declaration of `strtoumax', and to 0 if you
+   don't. */
+#undef HAVE_DECL_STRTOUMAX
+
+/* Define to 1 if you have the declaration of `towlower', and to 0 if you
+   don't. */
+#undef HAVE_DECL_TOWLOWER
+
+/* Define to 1 if you have the declaration of `unsetenv', and to 0 if you
+   don't. */
+#undef HAVE_DECL_UNSETENV
+
+/* Define to 1 if you have the declaration of `wcrtomb', and to 0 if you
+   don't. */
+#undef HAVE_DECL_WCRTOMB
+
+/* Define to 1 if you have the declaration of `wcsdup', and to 0 if you don't.
+   */
+#undef HAVE_DECL_WCSDUP
+
+/* Define to 1 if you have the declaration of `wctob', and to 0 if you don't.
+   */
+#undef HAVE_DECL_WCTOB
+
+/* Define to 1 if you have the declaration of `wcwidth', and to 0 if you
+   don't. */
+#undef HAVE_DECL_WCWIDTH
+
+/* Define to 1 if you have the declaration of `_putenv', and to 0 if you
+   don't. */
+#undef HAVE_DECL__PUTENV
+
+/* Define to 1 if you have the declaration of `_snprintf', and to 0 if you
+   don't. */
+#undef HAVE_DECL__SNPRINTF
+
+/* Define to 1 if you have the declaration of `__argv', and to 0 if you don't.
+   */
+#undef HAVE_DECL___ARGV
+
+/* Define to 1 if you have the declaration of `__fpending', and to 0 if you
+   don't. */
+#undef HAVE_DECL___FPENDING
+
+/* Define to 1 if you have the <dirent.h> header file, and it defines `DIR'.
+   */
+#undef HAVE_DIRENT_H
+
+/* Define to 1 if you have the `dirfd' function. */
+#undef HAVE_DIRFD
+
+/* Define to 1 if you have the `duplocale' function. */
+#undef HAVE_DUPLOCALE
+
+/* Define if you have the declaration of environ. */
+#undef HAVE_ENVIRON_DECL
+
+/* Define if the locale_t type contains insufficient information, as on
+   OpenBSD. */
+#undef HAVE_FAKE_LOCALES
+
+/* Define to 1 if you have the `fchdir' function. */
+#undef HAVE_FCHDIR
+
+/* Define to 1 if you have the `fcntl' function. */
+#undef HAVE_FCNTL
+
+/* Define to 1 if you have the `fdopendir' function. */
+#undef HAVE_FDOPENDIR
+
+/* Define to 1 if you have the <features.h> header file. */
+#undef HAVE_FEATURES_H
+
+/* Define to 1 if you have the `fnmatch' function. */
+#undef HAVE_FNMATCH
+
+/* Define to 1 if you have the <fnmatch.h> header file. */
+#undef HAVE_FNMATCH_H
+
+/* Define to 1 if you have the `freelocale' function. */
+#undef HAVE_FREELOCALE
+
+/* Define if the 'free' function is guaranteed to preserve errno. */
+#undef HAVE_FREE_POSIX
+
+/* Define to 1 if you have the `fstatat' function. */
+#undef HAVE_FSTATAT
+
+/* Define to 1 if you have the `fstatfs' function. */
+#undef HAVE_FSTATFS
+
+/* Define to 1 if you have the `ftruncate' function. */
+#undef HAVE_FTRUNCATE
+
+/* Define to 1 if you have the `getdtablesize' function. */
+#undef HAVE_GETDTABLESIZE
+
+/* Define to 1 if you have the `getexecname' function. */
+#undef HAVE_GETEXECNAME
+
+/* Define to 1 if you have the `getlocalename_l' function. */
+#undef HAVE_GETLOCALENAME_L
+
+/* Define to 1 if you have the <getopt.h> header file. */
+#undef HAVE_GETOPT_H
+
+/* Define to 1 if you have the `getopt_long_only' function. */
+#undef HAVE_GETOPT_LONG_ONLY
+
+/* Define to 1 if you have the `getprogname' function. */
+#undef HAVE_GETPROGNAME
+
+/* Define to 1 if you have the `getrlimit' function. */
+#undef HAVE_GETRLIMIT
+
+/* Define if the GNU gettext() function is already present or preinstalled. */
+#undef HAVE_GETTEXT
+
+/* Define to 1 if you have the `gettimeofday' function. */
+#undef HAVE_GETTIMEOFDAY
+
+/* Define if the uselocale exists, may be safely called, and returns
+   sufficient information. */
+#undef HAVE_GOOD_USELOCALE
+
+/* Define if you have the iconv() function and it works. */
+#undef HAVE_ICONV
+
+/* Define to 1 if you have the <iconv.h> header file. */
+#undef HAVE_ICONV_H
+
+/* Define to 1 if you have the `inet_pton' function. */
+#undef HAVE_INET_PTON
+
+/* Define to 1 if the compiler supports one of the keywords 'inline',
+   '__inline__', '__inline' and effectively inlines functions marked as such.
+   */
+#undef HAVE_INLINE
+
+/* Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>. */
+#undef HAVE_INTMAX_T
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#undef HAVE_INTTYPES_H
+
+/* Define if <inttypes.h> exists, doesn't clash with <sys/types.h>, and
+   declares uintmax_t. */
+#undef HAVE_INTTYPES_H_WITH_UINTMAX
+
+/* Define to 1 if you have the `ioctl' function. */
+#undef HAVE_IOCTL
+
+/* Define to 1 if <sys/socket.h> defines AF_INET. */
+#undef HAVE_IPV4
+
+/* Define to 1 if <sys/socket.h> defines AF_INET6. */
+#undef HAVE_IPV6
+
+/* Define to 1 if you have the `isascii' function. */
+#undef HAVE_ISASCII
+
+/* Define to 1 if you have the `isblank' function. */
+#undef HAVE_ISBLANK
+
+/* Define to 1 if you have the `iswblank' function. */
+#undef HAVE_ISWBLANK
+
+/* Define to 1 if you have the `iswcntrl' function. */
+#undef HAVE_ISWCNTRL
+
+/* Define to 1 if you have the `iswctype' function. */
+#undef HAVE_ISWCTYPE
+
+/* Define if you have <langinfo.h> and nl_langinfo(CODESET). */
+#undef HAVE_LANGINFO_CODESET
+
+/* Define to 1 if you have the <langinfo.h> header file. */
+#undef HAVE_LANGINFO_H
+
+/* Define if your <locale.h> file defines LC_MESSAGES. */
+#undef HAVE_LC_MESSAGES
+
+/* Define to 1 if you have the <libintl.h> header file. */
+#undef HAVE_LIBINTL_H
+
+/* Define to 1 if you have the Perl Compatible Regular Expressions library
+   (-lpcre). */
+#undef HAVE_LIBPCRE
+
+/* Define if you have the libsigsegv library. */
+#undef HAVE_LIBSIGSEGV
+
+/* Define to 1 if you have the <limits.h> header file. */
+#undef HAVE_LIMITS_H
+
+/* Define to 1 if the system has the type 'long long int'. */
+#undef HAVE_LONG_LONG_INT
+
+/* Define to 1 if you have the `lstat' function. */
+#undef HAVE_LSTAT
+
+/* Define to 1 if you have the <malloc.h> header file. */
+#undef HAVE_MALLOC_H
+
+/* Define if malloc, realloc, and calloc set errno on allocation failure. */
+#undef HAVE_MALLOC_POSIX
+
+/* Define to 1 if mmap()'s MAP_ANONYMOUS flag is available after including
+   config.h and <sys/mman.h>. */
+#undef HAVE_MAP_ANONYMOUS
+
+/* Define to 1 if you have the `mbrlen' function. */
+#undef HAVE_MBRLEN
+
+/* Define to 1 if you have the `mbrtowc' function. */
+#undef HAVE_MBRTOWC
+
+/* Define to 1 if you have the `mbsinit' function. */
+#undef HAVE_MBSINIT
+
+/* Define to 1 if you have the `mbslen' function. */
+#undef HAVE_MBSLEN
+
+/* Define to 1 if you have the `mbsrtowcs' function. */
+#undef HAVE_MBSRTOWCS
+
+/* Define to 1 if <wchar.h> declares mbstate_t. */
+#undef HAVE_MBSTATE_T
+
+/* Define to 1 if you have the `mbtowc' function. */
+#undef HAVE_MBTOWC
+
+/* Define to 1 if you have the `mempcpy' function. */
+#undef HAVE_MEMPCPY
+
+/* Define to 1 if you have the `memrchr' function. */
+#undef HAVE_MEMRCHR
+
+/* Define to 1 if you have the <minix/config.h> header file. */
+#undef HAVE_MINIX_CONFIG_H
+
+/* Define to 1 if <limits.h> defines the MIN and MAX macros. */
+#undef HAVE_MINMAX_IN_LIMITS_H
+
+/* Define to 1 if <sys/param.h> defines the MIN and MAX macros. */
+#undef HAVE_MINMAX_IN_SYS_PARAM_H
+
+/* Define to 1 if you have the `mprotect' function. */
+#undef HAVE_MPROTECT
+
+/* Define to 1 on MSVC platforms that have the "invalid parameter handler"
+   concept. */
+#undef HAVE_MSVC_INVALID_PARAMETER_HANDLER
+
+/* Define if the locale_t type does not contain the name of each locale
+   category. */
+#undef HAVE_NAMELESS_LOCALES
+
+/* Define to 1 if you have the <ndir.h> header file, and it defines `DIR'. */
+#undef HAVE_NDIR_H
+
+/* Define to 1 if you have the <netdb.h> header file. */
+#undef HAVE_NETDB_H
+
+/* Define to 1 if you have the <netinet/in.h> header file. */
+#undef HAVE_NETINET_IN_H
+
+/* Define to 1 if you have the `newlocale' function. */
+#undef HAVE_NEWLOCALE
+
+/* Define to 1 if you have the `nl_langinfo' function. */
+#undef HAVE_NL_LANGINFO
+
+/* Define to 1 if the system has obstacks that work with any size object. */
+#undef HAVE_OBSTACK
+
+/* Define to 1 if you have the `openat' function. */
+#undef HAVE_OPENAT
+
+/* Define to 1 if you have the `opendir' function. */
+#undef HAVE_OPENDIR
+
+/* Define to 1 if you have the <OS.h> header file. */
+#undef HAVE_OS_H
+
+/* Define to 1 if you have the `pipe' function. */
+#undef HAVE_PIPE
+
+/* Define if you have the <pthread.h> header and the POSIX threads API. */
+#undef HAVE_PTHREAD_API
+
+/* Define to 1 if you have the `pthread_atfork' function. */
+#undef HAVE_PTHREAD_ATFORK
+
+/* Define to 1 if you have the <pthread.h> header file. */
+#undef HAVE_PTHREAD_H
+
+/* Define if the <pthread.h> defines PTHREAD_MUTEX_RECURSIVE. */
+#undef HAVE_PTHREAD_MUTEX_RECURSIVE
+
+/* Define if the POSIX multithreading library has read/write locks. */
+#undef HAVE_PTHREAD_RWLOCK
+
+/* Define if the 'pthread_rwlock_rdlock' function prefers a writer to a
+   reader. */
+#undef HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER
+
+/* Define to 1 if the pthread_sigmask function can be used (despite bugs). */
+#undef HAVE_PTHREAD_SIGMASK
+
+/* Define to 1 if the system has the type `pthread_spinlock_t'. */
+#undef HAVE_PTHREAD_SPINLOCK_T
+
+/* Define to 1 if the system has the type `pthread_t'. */
+#undef HAVE_PTHREAD_T
+
+/* Define to 1 if you have the `raise' function. */
+#undef HAVE_RAISE
+
+/* Define to 1 if you have the `rawmemchr' function. */
+#undef HAVE_RAWMEMCHR
+
+/* Define to 1 if you have the `readdir' function. */
+#undef HAVE_READDIR
+
+/* Define to 1 if you have the `reallocarray' function. */
+#undef HAVE_REALLOCARRAY
+
+/* Define to 1 if the system has the type `sa_family_t'. */
+#undef HAVE_SA_FAMILY_T
+
+/* Define to 1 if you have the <sched.h> header file. */
+#undef HAVE_SCHED_H
+
+/* Define to 1 if you have the <sdkddkver.h> header file. */
+#undef HAVE_SDKDDKVER_H
+
+/* Define to 1 if you have the <search.h> header file. */
+#undef HAVE_SEARCH_H
+
+/* Define to 1 if you have the `setdtablesize' function. */
+#undef HAVE_SETDTABLESIZE
+
+/* Define to 1 if you have the `setenv' function. */
+#undef HAVE_SETENV
+
+/* Define to 1 if you have the `setlocale' function. */
+#undef HAVE_SETLOCALE
+
+/* Define to 1 if you have the `setrlimit' function. */
+#undef HAVE_SETRLIMIT
+
+/* Define to 1 if you have the `shutdown' function. */
+#undef HAVE_SHUTDOWN
+
+/* Define to 1 if you have the `sigaction' function. */
+#undef HAVE_SIGACTION
+
+/* Define to 1 if you have the `sigaltstack' function. */
+#undef HAVE_SIGALTSTACK
+
+/* Define to 1 if the system has the type `siginfo_t'. */
+#undef HAVE_SIGINFO_T
+
+/* Define to 1 if you have the `siginterrupt' function. */
+#undef HAVE_SIGINTERRUPT
+
+/* Define to 1 if 'sig_atomic_t' is a signed integer type. */
+#undef HAVE_SIGNED_SIG_ATOMIC_T
+
+/* Define to 1 if 'wchar_t' is a signed integer type. */
+#undef HAVE_SIGNED_WCHAR_T
+
+/* Define to 1 if 'wint_t' is a signed integer type. */
+#undef HAVE_SIGNED_WINT_T
+
+/* Define to 1 if the system has the type `sigset_t'. */
+#undef HAVE_SIGSET_T
+
+/* Define to 1 if you have the `sleep' function. */
+#undef HAVE_SLEEP
+
+/* Define to 1 if you have the `snprintf' function. */
+#undef HAVE_SNPRINTF
+
+/* Define if the return value of the snprintf function is the number of of
+   bytes (excluding the terminating NUL) that would have been produced if the
+   buffer had been large enough. */
+#undef HAVE_SNPRINTF_RETVAL_C99
+
+/* Define if the string produced by the snprintf function is always NUL
+   terminated. */
+#undef HAVE_SNPRINTF_TRUNCATION_C99
+
+/* Define if the locale_t type is as on Solaris 11.4. */
+#undef HAVE_SOLARIS114_LOCALES
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#undef HAVE_STDINT_H
+
+/* Define if <stdint.h> exists, doesn't clash with <sys/types.h>, and declares
+   uintmax_t. */
+#undef HAVE_STDINT_H_WITH_UINTMAX
+
+/* Define to 1 if you have the <stdio_ext.h> header file. */
+#undef HAVE_STDIO_EXT_H
+
+/* Define to 1 if you have the <stdio.h> header file. */
+#undef HAVE_STDIO_H
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#undef HAVE_STDLIB_H
+
+/* Define to 1 if you have the `stpcpy' function. */
+#undef HAVE_STPCPY
+
+/* Define to 1 if you have the `strerror_r' function. */
+#undef HAVE_STRERROR_R
+
+/* Define to 1 if you have the <strings.h> header file. */
+#undef HAVE_STRINGS_H
+
+/* Define to 1 if you have the <string.h> header file. */
+#undef HAVE_STRING_H
+
+/* Define to 1 if you have the `strnlen' function. */
+#undef HAVE_STRNLEN
+
+/* Define to 1 if you have the `strtoimax' function. */
+#undef HAVE_STRTOIMAX
+
+/* Define to 1 if you have the `strtoll' function. */
+#undef HAVE_STRTOLL
+
+/* Define to 1 if you have the `strtoull' function. */
+#undef HAVE_STRTOULL
+
+/* Define to 1 if you have the `strtoumax' function. */
+#undef HAVE_STRTOUMAX
+
+/* Define if there is a member named d_type in the struct describing directory
+   headers. */
+#undef HAVE_STRUCT_DIRENT_D_TYPE
+
+/* Define to 1 if `decimal_point' is a member of `struct lconv'. */
+#undef HAVE_STRUCT_LCONV_DECIMAL_POINT
+
+/* Define to 1 if `sa_sigaction' is a member of `struct sigaction'. */
+#undef HAVE_STRUCT_SIGACTION_SA_SIGACTION
+
+/* Define to 1 if the system has the type `struct sockaddr_storage'. */
+#undef HAVE_STRUCT_SOCKADDR_STORAGE
+
+/* Define to 1 if `ss_family' is a member of `struct sockaddr_storage'. */
+#undef HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY
+
+/* Define to 1 if `f_type' is a member of `struct statfs'. */
+#undef HAVE_STRUCT_STATFS_F_TYPE
+
+/* Define to 1 if `st_atimensec' is a member of `struct stat'. */
+#undef HAVE_STRUCT_STAT_ST_ATIMENSEC
+
+/* Define to 1 if `st_atimespec.tv_nsec' is a member of `struct stat'. */
+#undef HAVE_STRUCT_STAT_ST_ATIMESPEC_TV_NSEC
+
+/* Define to 1 if `st_atim.st__tim.tv_nsec' is a member of `struct stat'. */
+#undef HAVE_STRUCT_STAT_ST_ATIM_ST__TIM_TV_NSEC
+
+/* Define to 1 if `st_atim.tv_nsec' is a member of `struct stat'. */
+#undef HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC
+
+/* Define to 1 if `st_birthtimensec' is a member of `struct stat'. */
+#undef HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC
+
+/* Define to 1 if `st_birthtimespec.tv_nsec' is a member of `struct stat'. */
+#undef HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC
+
+/* Define to 1 if `st_birthtim.tv_nsec' is a member of `struct stat'. */
+#undef HAVE_STRUCT_STAT_ST_BIRTHTIM_TV_NSEC
+
+/* Define to 1 if you have the `symlink' function. */
+#undef HAVE_SYMLINK
+
+/* Define to 1 if you have the <sys/bitypes.h> header file. */
+#undef HAVE_SYS_BITYPES_H
+
+/* Define to 1 if you have the <sys/cdefs.h> header file. */
+#undef HAVE_SYS_CDEFS_H
+
+/* Define to 1 if you have the <sys/dir.h> header file, and it defines `DIR'.
+   */
+#undef HAVE_SYS_DIR_H
+
+/* Define to 1 if you have the <sys/inttypes.h> header file. */
+#undef HAVE_SYS_INTTYPES_H
+
+/* Define to 1 if you have the <sys/ioctl.h> header file. */
+#undef HAVE_SYS_IOCTL_H
+
+/* Define to 1 if you have the <sys/mman.h> header file. */
+#undef HAVE_SYS_MMAN_H
+
+/* Define to 1 if you have the <sys/ndir.h> header file, and it defines `DIR'.
+   */
+#undef HAVE_SYS_NDIR_H
+
+/* Define to 1 if you have the <sys/param.h> header file. */
+#undef HAVE_SYS_PARAM_H
+
+/* Define to 1 if you have the <sys/select.h> header file. */
+#undef HAVE_SYS_SELECT_H
+
+/* Define to 1 if you have the <sys/single_threaded.h> header file. */
+#undef HAVE_SYS_SINGLE_THREADED_H
+
+/* Define to 1 if you have the <sys/socket.h> header file. */
+#undef HAVE_SYS_SOCKET_H
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#undef HAVE_SYS_STAT_H
+
+/* Define to 1 if you have the <sys/time.h> header file. */
+#undef HAVE_SYS_TIME_H
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#undef HAVE_SYS_TYPES_H
+
+/* Define to 1 if you have the <sys/uio.h> header file. */
+#undef HAVE_SYS_UIO_H
+
+/* Define to 1 if you have the <sys/vfs.h> header file. */
+#undef HAVE_SYS_VFS_H
+
+/* Define to 1 if you have the <sys/wait.h> header file. */
+#undef HAVE_SYS_WAIT_H
+
+/* Define to 1 if you have the `thrd_create' function. */
+#undef HAVE_THRD_CREATE
+
+/* Define to 1 if you have the <threads.h> header file. */
+#undef HAVE_THREADS_H
+
+/* Define to 1 if you have the `towlower' function. */
+#undef HAVE_TOWLOWER
+
+/* Define to 1 if you have the `tsearch' function. */
+#undef HAVE_TSEARCH
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#undef HAVE_UNISTD_H
+
+/* Define to 1 if you have the `unsetenv' function. */
+#undef HAVE_UNSETENV
+
+/* Define to 1 if the system has the type 'unsigned long long int'. */
+#undef HAVE_UNSIGNED_LONG_LONG_INT
+
+/* Define to 1 if you have the `uselocale' function. */
+#undef HAVE_USELOCALE
+
+/* Define if you have a global __progname variable */
+#undef HAVE_VAR___PROGNAME
+
+/* Define to 1 if you have the `vasnprintf' function. */
+#undef HAVE_VASNPRINTF
+
+/* Define to 1 or 0, depending whether the compiler supports simple visibility
+   declarations. */
+#undef HAVE_VISIBILITY
+
+/* Define to 1 if you have the <wchar.h> header file. */
+#undef HAVE_WCHAR_H
+
+/* Define if you have the 'wchar_t' type. */
+#undef HAVE_WCHAR_T
+
+/* Define to 1 if you have the `wcrtomb' function. */
+#undef HAVE_WCRTOMB
+
+/* Define to 1 if you have the `wcslen' function. */
+#undef HAVE_WCSLEN
+
+/* Define to 1 if you have the `wcsnlen' function. */
+#undef HAVE_WCSNLEN
+
+/* Define to 1 if you have the `wctob' function. */
+#undef HAVE_WCTOB
+
+/* Define to 1 if you have the <wctype.h> header file. */
+#undef HAVE_WCTYPE_H
+
+/* Define to 1 if you have the `wcwidth' function. */
+#undef HAVE_WCWIDTH
+
+/* Define to 1 if the compiler and linker support weak declarations of
+   symbols. */
+#undef HAVE_WEAK_SYMBOLS
+
+/* Define to 1 if you have the <winsock2.h> header file. */
+#undef HAVE_WINSOCK2_H
+
+/* Define if you have the 'wint_t' type. */
+#undef HAVE_WINT_T
+
+/* Define to 1 if you have the `wmempcpy' function. */
+#undef HAVE_WMEMPCPY
+
+/* Define to 1 if fstatat (..., 0) works. For example, it does not work in AIX
+   7.1. */
+#undef HAVE_WORKING_FSTATAT_ZERO_FLAG
+
+/* Define to 1 if O_NOATIME works. */
+#undef HAVE_WORKING_O_NOATIME
+
+/* Define to 1 if O_NOFOLLOW works. */
+#undef HAVE_WORKING_O_NOFOLLOW
+
+/* Define if you have the sigaltstack() function and it works. */
+#undef HAVE_WORKING_SIGALTSTACK
+
+/* Define if the uselocale function exists and may safely be called. */
+#undef HAVE_WORKING_USELOCALE
+
+/* Define to 1 if you have the <ws2tcpip.h> header file. */
+#undef HAVE_WS2TCPIP_H
+
+/* Define to 1 if you have the <xlocale.h> header file. */
+#undef HAVE_XLOCALE_H
+
+/* Define to 1 if the system has the type `_Bool'. */
+#undef HAVE__BOOL
+
+/* Define to 1 if you have the `_chsize' function. */
+#undef HAVE__CHSIZE
+
+/* Define to 1 if you have the `_set_invalid_parameter_handler' function. */
+#undef HAVE__SET_INVALID_PARAMETER_HANDLER
+
+/* Define to 1 if the compiler supports __builtin_expect,
+   and to 2 if <builtins.h> does.  */
+#undef HAVE___BUILTIN_EXPECT
+#ifndef HAVE___BUILTIN_EXPECT
+# define __builtin_expect(e, c) (e)
+#elif HAVE___BUILTIN_EXPECT == 2
+# include <builtins.h>
+#endif
+    
+
+/* Define to 1 if the system has the type `__fsword_t'. */
+#undef HAVE___FSWORD_T
+
+/* Define to 1 if the compiler supports the keyword '__inline'. */
+#undef HAVE___INLINE
+
+/* Define to 1 if you have the `__xpg_strerror_r' function. */
+#undef HAVE___XPG_STRERROR_R
+
+/* Define as const if the declaration of iconv() needs const. */
+#undef ICONV_CONST
+
+/* Define to a symbolic name denoting the flavor of iconv_open()
+   implementation. */
+#undef ICONV_FLAVOR
+
+/* Define if localename.c overrides newlocale(), duplocale(), freelocale(). */
+#undef LOCALENAME_ENHANCE_LOCALE_FUNCS
+
+/* Define to 1 if lseek does not detect pipes. */
+#undef LSEEK_PIPE_BROKEN
+
+/* Define to 1 if 'lstat' dereferences a symlink specified with a trailing
+   slash. */
+#undef LSTAT_FOLLOWS_SLASHED_SYMLINK
+
+/* If malloc(0) is != NULL, define this to 1. Otherwise define this to 0. */
+#undef MALLOC_0_IS_NONNULL
+
+/* Define to a substitute value for mmap()'s MAP_ANONYMOUS flag. */
+#undef MAP_ANONYMOUS
+
+/* Define if the mbrtowc function does not return (size_t) -2 for empty input.
+   */
+#undef MBRTOWC_EMPTY_INPUT_BUG
+
+/* Define if the mbrtowc function may signal encoding errors in the C locale.
+   */
+#undef MBRTOWC_IN_C_LOCALE_MAYBE_EILSEQ
+
+/* Define if the mbrtowc function has the NULL pwc argument bug. */
+#undef MBRTOWC_NULL_ARG1_BUG
+
+/* Define if the mbrtowc function has the NULL string argument bug. */
+#undef MBRTOWC_NULL_ARG2_BUG
+
+/* Define if the mbrtowc function does not return 0 for a NUL character. */
+#undef MBRTOWC_NUL_RETVAL_BUG
+
+/* Define if the mbrtowc function returns a wrong return value. */
+#undef MBRTOWC_RETVAL_BUG
+
+/* Define if the mbrtowc function stores a wide character when reporting
+   incomplete input. */
+#undef MBRTOWC_STORES_INCOMPLETE_BUG
+
+/* Use GNU style printf and scanf.  */
+#ifndef __USE_MINGW_ANSI_STDIO
+# undef __USE_MINGW_ANSI_STDIO
+#endif
+
+
+/* Define to 1 on musl libc. */
+#undef MUSL_LIBC
+
+/* Define to 1 if assertions should be disabled. */
+#undef NDEBUG
+
+/* Define to 1 to enable general improvements of setlocale. */
+#undef NEED_SETLOCALE_IMPROVED
+
+/* Define to 1 to enable a multithread-safety fix of setlocale. */
+#undef NEED_SETLOCALE_MTSAFE
+
+/* Define to 1 if nl_langinfo is multithread-safe. */
+#undef NL_LANGINFO_MTSAFE
+
+/* Define to 1 if open() fails to recognize a trailing slash. */
+#undef OPEN_TRAILING_SLASH_BUG
+
+/* Name of package */
+#undef PACKAGE
+
+/* Define to the address where bug reports for this package should be sent. */
+#undef PACKAGE_BUGREPORT
+
+/* Define to the full name of this package. */
+#undef PACKAGE_NAME
+
+/* String identifying the packager of this software */
+#undef PACKAGE_PACKAGER
+
+/* Packager info for bug reports (URL/e-mail/...) */
+#undef PACKAGE_PACKAGER_BUG_REPORTS
+
+/* Packager-specific version information */
+#undef PACKAGE_PACKAGER_VERSION
+
+/* Define to the full name and version of this package. */
+#undef PACKAGE_STRING
+
+/* Define to the one symbol short name of this package. */
+#undef PACKAGE_TARNAME
+
+/* Define to the home page for this package. */
+#undef PACKAGE_URL
+
+/* Define to the version of this package. */
+#undef PACKAGE_VERSION
+
+/* Define to the type that is the result of default argument promotions of
+   type mode_t. */
+#undef PROMOTED_MODE_T
+
+/* Define if pthread_create is an inline function. */
+#undef PTHREAD_CREATE_IS_INLINE
+
+/* Define if the pthread_in_use() detection is hard. */
+#undef PTHREAD_IN_USE_DETECTION_HARD
+
+/* Define to 1 if pthread_sigmask(), when it fails, returns -1 and sets errno.
+   */
+#undef PTHREAD_SIGMASK_FAILS_WITH_ERRNO
+
+/* Define to 1 if pthread_sigmask may return 0 and have no effect. */
+#undef PTHREAD_SIGMASK_INEFFECTIVE
+
+/* Define to 1 if pthread_sigmask() unblocks signals incorrectly. */
+#undef PTHREAD_SIGMASK_UNBLOCK_BUG
+
+/* Define to l, ll, u, ul, ull, etc., as suitable for constants of type
+   'ptrdiff_t'. */
+#undef PTRDIFF_T_SUFFIX
+
+/* Define to 1 if gnulib's dirfd() replacement is used. */
+#undef REPLACE_DIRFD
+
+/* Define to 1 if gnulib's fchdir() replacement is used. */
+#undef REPLACE_FCHDIR
+
+/* Define to 1 if stat needs help when passed a file name with a trailing
+   slash */
+#undef REPLACE_FUNC_STAT_FILE
+
+/* Define if nl_langinfo exists but is overridden by gnulib. */
+#undef REPLACE_NL_LANGINFO
+
+/* Define to 1 if open() should work around the inability to open a directory.
+   */
+#undef REPLACE_OPEN_DIRECTORY
+
+/* Define to 1 if strerror(0) does not return a message implying success. */
+#undef REPLACE_STRERROR_0
+
+/* Define if vasnprintf exists but is overridden by gnulib. */
+#undef REPLACE_VASNPRINTF
+
+/* Define to 1 if setlocale (LC_ALL, NULL) is multithread-safe. */
+#undef SETLOCALE_NULL_ALL_MTSAFE
+
+/* Define to 1 if setlocale (category, NULL) is multithread-safe. */
+#undef SETLOCALE_NULL_ONE_MTSAFE
+
+/* Define if sigaltstack() interprets the stack_t.ss_sp field incorrectly, as
+   the highest address of the alternate stack range rather than as the lowest
+   address. */
+#undef SIGALTSTACK_SS_REVERSED
+
+/* Define to l, ll, u, ul, ull, etc., as suitable for constants of type
+   'sig_atomic_t'. */
+#undef SIG_ATOMIC_T_SUFFIX
+
+/* Define as the maximum value of type 'size_t', if the system doesn't define
+   it. */
+#ifndef SIZE_MAX
+# undef SIZE_MAX
+#endif
+
+/* Define to l, ll, u, ul, ull, etc., as suitable for constants of type
+   'size_t'. */
+#undef SIZE_T_SUFFIX
+
+/* Define on Solaris 11 and its derivates. */
+#undef SOLARIS11
+
+/* Define as the direction of stack growth for your system. STACK_DIRECTION >
+   0 => grows toward higher addresses STACK_DIRECTION < 0 => grows toward
+   lower addresses STACK_DIRECTION = 0 => spaghetti stack. */
+#undef STACK_DIRECTION
+
+/* Define to 1 if the `S_IS*' macros in <sys/stat.h> do not work properly. */
+#undef STAT_MACROS_BROKEN
+
+/* Define to 1 if all of the C90 standard headers exist (not just the ones
+   required in a freestanding environment). This macro is provided for
+   backward compatibility; new code need not use it. */
+#undef STDC_HEADERS
+
+/* Define to 1 if strerror_r returns char *. */
+#undef STRERROR_R_CHAR_P
+
+/* Define to 1 if the type of the st_atim member of a struct stat is struct
+   timespec. */
+#undef TYPEOF_STRUCT_STAT_ST_ATIM_IS_STRUCT_TIMESPEC
+
+/* Define if the combination of the ISO C and POSIX multithreading APIs can be
+   used. */
+#undef USE_ISOC_AND_POSIX_THREADS
+
+/* Define if the ISO C multithreading library can be used. */
+#undef USE_ISOC_THREADS
+
+/* Define if the POSIX multithreading library can be used. */
+#undef USE_POSIX_THREADS
+
+/* Define if references to the POSIX multithreading library are satisfied by
+   libc. */
+#undef USE_POSIX_THREADS_FROM_LIBC
+
+/* Define if references to the POSIX multithreading library should be made
+   weak. */
+#undef USE_POSIX_THREADS_WEAK
+
+/* Enable extensions on AIX 3, Interix.  */
+#ifndef _ALL_SOURCE
+# undef _ALL_SOURCE
+#endif
+/* Enable general extensions on macOS.  */
+#ifndef _DARWIN_C_SOURCE
+# undef _DARWIN_C_SOURCE
+#endif
+/* Enable general extensions on Solaris.  */
+#ifndef __EXTENSIONS__
+# undef __EXTENSIONS__
+#endif
+/* Enable GNU extensions on systems that have them.  */
+#ifndef _GNU_SOURCE
+# undef _GNU_SOURCE
+#endif
+/* Enable X/Open compliant socket functions that do not require linking
+   with -lxnet on HP-UX 11.11.  */
+#ifndef _HPUX_ALT_XOPEN_SOCKET_API
+# undef _HPUX_ALT_XOPEN_SOCKET_API
+#endif
+/* Identify the host operating system as Minix.
+   This macro does not affect the system headers' behavior.
+   A future release of Autoconf may stop defining this macro.  */
+#ifndef _MINIX
+# undef _MINIX
+#endif
+/* Enable general extensions on NetBSD.
+   Enable NetBSD compatibility extensions on Minix.  */
+#ifndef _NETBSD_SOURCE
+# undef _NETBSD_SOURCE
+#endif
+/* Enable OpenBSD compatibility extensions on NetBSD.
+   Oddly enough, this does nothing on OpenBSD.  */
+#ifndef _OPENBSD_SOURCE
+# undef _OPENBSD_SOURCE
+#endif
+/* Define to 1 if needed for POSIX-compatible behavior.  */
+#ifndef _POSIX_SOURCE
+# undef _POSIX_SOURCE
+#endif
+/* Define to 2 if needed for POSIX-compatible behavior.  */
+#ifndef _POSIX_1_SOURCE
+# undef _POSIX_1_SOURCE
+#endif
+/* Enable POSIX-compatible threading on Solaris.  */
+#ifndef _POSIX_PTHREAD_SEMANTICS
+# undef _POSIX_PTHREAD_SEMANTICS
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-5:2014.  */
+#ifndef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+# undef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-1:2014.  */
+#ifndef __STDC_WANT_IEC_60559_BFP_EXT__
+# undef __STDC_WANT_IEC_60559_BFP_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-2:2015.  */
+#ifndef __STDC_WANT_IEC_60559_DFP_EXT__
+# undef __STDC_WANT_IEC_60559_DFP_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-4:2015.  */
+#ifndef __STDC_WANT_IEC_60559_FUNCS_EXT__
+# undef __STDC_WANT_IEC_60559_FUNCS_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-3:2015.  */
+#ifndef __STDC_WANT_IEC_60559_TYPES_EXT__
+# undef __STDC_WANT_IEC_60559_TYPES_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TR 24731-2:2010.  */
+#ifndef __STDC_WANT_LIB_EXT2__
+# undef __STDC_WANT_LIB_EXT2__
+#endif
+/* Enable extensions specified by ISO/IEC 24747:2009.  */
+#ifndef __STDC_WANT_MATH_SPEC_FUNCS__
+# undef __STDC_WANT_MATH_SPEC_FUNCS__
+#endif
+/* Enable extensions on HP NonStop.  */
+#ifndef _TANDEM_SOURCE
+# undef _TANDEM_SOURCE
+#endif
+/* Enable X/Open extensions.  Define to 500 only if necessary
+   to make mbstate_t available.  */
+#ifndef _XOPEN_SOURCE
+# undef _XOPEN_SOURCE
+#endif
+
+
+/* An alias of GNULIB_STDIO_SINGLE_THREAD. */
+#undef USE_UNLOCKED_IO
+
+/* Define if the native Windows multithreading API can be used. */
+#undef USE_WINDOWS_THREADS
+
+/* Version number of package */
+#undef VERSION
+
+/* Define to 1 if unsetenv returns void instead of int. */
+#undef VOID_UNSETENV
+
+/* Define to l, ll, u, ul, ull, etc., as suitable for constants of type
+   'wchar_t'. */
+#undef WCHAR_T_SUFFIX
+
+/* Define if the wcrtomb function does not work in the C locale. */
+#undef WCRTOMB_C_LOCALE_BUG
+
+/* Define if the wcrtomb function has an incorrect return value. */
+#undef WCRTOMB_RETVAL_BUG
+
+/* Define if WSAStartup is needed. */
+#undef WINDOWS_SOCKETS
+
+/* Define to l, ll, u, ul, ull, etc., as suitable for constants of type
+   'wint_t'. */
+#undef WINT_T_SUFFIX
+
+/* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most
+   significant byte first (like Motorola and SPARC, unlike Intel). */
+#if defined AC_APPLE_UNIVERSAL_BUILD
+# if defined __BIG_ENDIAN__
+#  define WORDS_BIGENDIAN 1
+# endif
+#else
+# ifndef WORDS_BIGENDIAN
+#  undef WORDS_BIGENDIAN
+# endif
+#endif
+
+/* Number of bits in a file offset, on hosts where this is settable. */
+#undef _FILE_OFFSET_BITS
+
+/* True if the compiler says it groks GNU C version MAJOR.MINOR.  */
+#if defined __GNUC__ && defined __GNUC_MINOR__
+# define _GL_GNUC_PREREQ(major, minor) \
+    ((major) < __GNUC__ + ((minor) <= __GNUC_MINOR__))
+#else
+# define _GL_GNUC_PREREQ(major, minor) 0
+#endif
+
+
+/* Define to enable the declarations of ISO C 11 types and functions. */
+#undef _ISOC11_SOURCE
+
+/* Define for large files, on AIX-style hosts. */
+#undef _LARGE_FILES
+
+/* Define to 1 on Solaris. */
+#undef _LCONV_C99
+
+/* The _Noreturn keyword of C11.  */
+#ifndef _Noreturn
+# if (defined __cplusplus \
+      && ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \
+          || (defined _MSC_VER && 1900 <= _MSC_VER)) \
+      && 0)
+    /* [[noreturn]] is not practically usable, because with it the syntax
+         extern _Noreturn void func (...);
+       would not be valid; such a declaration would only be valid with 'extern'
+       and '_Noreturn' swapped, or without the 'extern' keyword.  However, some
+       AIX system header files and several gnulib header files use precisely
+       this syntax with 'extern'.  */
+#  define _Noreturn [[noreturn]]
+# elif ((!defined __cplusplus || defined __clang__) \
+        && (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \
+            || (!defined __STRICT_ANSI__ \
+                && (_GL_GNUC_PREREQ (4, 7) \
+                    || (defined __apple_build_version__ \
+                        ? 6000000 <= __apple_build_version__ \
+                        : 3 < __clang_major__ + (5 <= __clang_minor__))))))
+   /* _Noreturn works as-is.  */
+# elif _GL_GNUC_PREREQ (2, 8) || defined __clang__ || 0x5110 <= __SUNPRO_C
+#  define _Noreturn __attribute__ ((__noreturn__))
+# elif 1200 <= (defined _MSC_VER ? _MSC_VER : 0)
+#  define _Noreturn __declspec (noreturn)
+# else
+#  define _Noreturn
+# endif
+#endif
+
+
+/* Define to 1 in order to get the POSIX compatible declarations of socket
+   functions. */
+#undef _POSIX_PII_SOCKET
+
+/* Define if you want <regex.h> to include <limits.h>, so that it consistently
+   overrides <limits.h>'s RE_DUP_MAX. */
+#undef _REGEX_INCLUDE_LIMITS_H
+
+/* Define if you want regoff_t to be at least as wide POSIX requires. */
+#undef _REGEX_LARGE_OFFSETS
+
+/* Number of bits in a timestamp, on hosts where this is settable. */
+#undef _TIME_BITS
+
+/* For standard stat data types on VMS. */
+#undef _USE_STD_STAT
+
+/* Define to rpl_ if the getopt replacement functions and variables should be
+   used. */
+#undef __GETOPT_PREFIX
+
+/* For 64-bit time_t on 32-bit mingw. */
+#undef __MINGW_USE_VC2005_COMPAT
+
+/* Define to 1 if the system <stdint.h> predates C++11. */
+#undef __STDC_CONSTANT_MACROS
+
+/* Define to 1 if the system <stdint.h> predates C++11. */
+#undef __STDC_LIMIT_MACROS
+
+/* The _GL_ASYNC_SAFE marker should be attached to functions that are
+   signal handlers (for signals other than SIGABRT, SIGPIPE) or can be
+   invoked from such signal handlers.  Such functions have some restrictions:
+     * All functions that it calls should be marked _GL_ASYNC_SAFE as well,
+       or should be listed as async-signal-safe in POSIX
+       <https://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html#tag_15_04>
+       section 2.4.3.  Note that malloc(), sprintf(), and fwrite(), in
+       particular, are NOT async-signal-safe.
+     * All memory locations (variables and struct fields) that these functions
+       access must be marked 'volatile'.  This holds for both read and write
+       accesses.  Otherwise the compiler might optimize away stores to and
+       reads from such locations that occur in the program, depending on its
+       data flow analysis.  For example, when the program contains a loop
+       that is intended to inspect a variable set from within a signal handler
+           while (!signal_occurred)
+             ;
+       the compiler is allowed to transform this into an endless loop if the
+       variable 'signal_occurred' is not declared 'volatile'.
+   Additionally, recall that:
+     * A signal handler should not modify errno (except if it is a handler
+       for a fatal signal and ends by raising the same signal again, thus
+       provoking the termination of the process).  If it invokes a function
+       that may clobber errno, it needs to save and restore the value of
+       errno.  */
+#define _GL_ASYNC_SAFE
+
+
+/* Attributes.  */
+#if (defined __has_attribute \
+     && (!defined __clang_minor__ \
+         || 3 < __clang_major__ + (5 <= __clang_minor__)))
+# define _GL_HAS_ATTRIBUTE(attr) __has_attribute (__##attr##__)
+#else
+# define _GL_HAS_ATTRIBUTE(attr) _GL_ATTR_##attr
+# define _GL_ATTR_alloc_size _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_always_inline _GL_GNUC_PREREQ (3, 2)
+# define _GL_ATTR_artificial _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_cold _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_const _GL_GNUC_PREREQ (2, 95)
+# define _GL_ATTR_deprecated _GL_GNUC_PREREQ (3, 1)
+# define _GL_ATTR_diagnose_if 0
+# define _GL_ATTR_error _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_externally_visible _GL_GNUC_PREREQ (4, 1)
+# define _GL_ATTR_fallthrough _GL_GNUC_PREREQ (7, 0)
+# define _GL_ATTR_format _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_leaf _GL_GNUC_PREREQ (4, 6)
+# define _GL_ATTR_malloc _GL_GNUC_PREREQ (3, 0)
+# ifdef _ICC
+#  define _GL_ATTR_may_alias 0
+# else
+#  define _GL_ATTR_may_alias _GL_GNUC_PREREQ (3, 3)
+# endif
+# define _GL_ATTR_noinline _GL_GNUC_PREREQ (3, 1)
+# define _GL_ATTR_nonnull _GL_GNUC_PREREQ (3, 3)
+# define _GL_ATTR_nonstring _GL_GNUC_PREREQ (8, 0)
+# define _GL_ATTR_nothrow _GL_GNUC_PREREQ (3, 3)
+# define _GL_ATTR_packed _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_pure _GL_GNUC_PREREQ (2, 96)
+# define _GL_ATTR_returns_nonnull _GL_GNUC_PREREQ (4, 9)
+# define _GL_ATTR_sentinel _GL_GNUC_PREREQ (4, 0)
+# define _GL_ATTR_unused _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_warn_unused_result _GL_GNUC_PREREQ (3, 4)
+#endif
+
+#ifdef __has_c_attribute
+# define _GL_HAS_C_ATTRIBUTE(attr) __has_c_attribute (__##attr##__)
+#else
+# define _GL_HAS_C_ATTRIBUTE(attr) 0
+#endif
+
+
+#if _GL_HAS_ATTRIBUTE (alloc_size)
+# define _GL_ATTRIBUTE_ALLOC_SIZE(args) __attribute__ ((__alloc_size__ args))
+#else
+# define _GL_ATTRIBUTE_ALLOC_SIZE(args)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (always_inline)
+# define _GL_ATTRIBUTE_ALWAYS_INLINE __attribute__ ((__always_inline__))
+#else
+# define _GL_ATTRIBUTE_ALWAYS_INLINE
+#endif
+
+#if _GL_HAS_ATTRIBUTE (artificial)
+# define _GL_ATTRIBUTE_ARTIFICIAL __attribute__ ((__artificial__))
+#else
+# define _GL_ATTRIBUTE_ARTIFICIAL
+#endif
+
+/* Avoid __attribute__ ((cold)) on MinGW; see thread starting at
+   <https://lists.gnu.org/r/emacs-devel/2019-04/msg01152.html>.
+   Also, Oracle Studio 12.6 requires 'cold' not '__cold__'.  */
+#if _GL_HAS_ATTRIBUTE (cold) && !defined __MINGW32__
+# ifndef __SUNPRO_C
+#  define _GL_ATTRIBUTE_COLD __attribute__ ((__cold__))
+# else
+#  define _GL_ATTRIBUTE_COLD __attribute__ ((cold))
+# endif
+#else
+# define _GL_ATTRIBUTE_COLD
+#endif
+
+#if _GL_HAS_ATTRIBUTE (const)
+# define _GL_ATTRIBUTE_CONST __attribute__ ((__const__))
+#else
+# define _GL_ATTRIBUTE_CONST
+#endif
+
+/* _GL_ATTRIBUTE_DEALLOC (F, I) is for functions returning pointers
+   that can be freed by passing them as the Ith argument to the
+   function F.  _GL_ATTRIBUTE_DEALLOC_FREE is for functions that
+   return pointers that can be freed via 'free'; it can be used
+   only after including stdlib.h.  These macros cannot be used on
+   inline functions.  */
+#if _GL_GNUC_PREREQ (11, 0)
+# define _GL_ATTRIBUTE_DEALLOC(f, i) __attribute__ ((__malloc__ (f, i)))
+#else
+# define _GL_ATTRIBUTE_DEALLOC(f, i)
+#endif
+#define _GL_ATTRIBUTE_DEALLOC_FREE _GL_ATTRIBUTE_DEALLOC (free, 1)
+
+#if _GL_HAS_C_ATTRIBUTE (deprecated)
+# define _GL_ATTRIBUTE_DEPRECATED [[__deprecated__]]
+#elif _GL_HAS_ATTRIBUTE (deprecated)
+# define _GL_ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__))
+#else
+# define _GL_ATTRIBUTE_DEPRECATED
+#endif
+
+#if _GL_HAS_ATTRIBUTE (error)
+# define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__error__ (msg)))
+# define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__warning__ (msg)))
+#elif _GL_HAS_ATTRIBUTE (diagnose_if)
+# define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__diagnose_if__ (1, msg, "error")))
+# define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__diagnose_if__ (1, msg, "warning")))
+#else
+# define _GL_ATTRIBUTE_ERROR(msg)
+# define _GL_ATTRIBUTE_WARNING(msg)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (externally_visible)
+# define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((externally_visible))
+#else
+# define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE
+#endif
+
+/* FALLTHROUGH is special, because it always expands to something.  */
+#if _GL_HAS_C_ATTRIBUTE (fallthrough)
+# define _GL_ATTRIBUTE_FALLTHROUGH [[__fallthrough__]]
+#elif _GL_HAS_ATTRIBUTE (fallthrough)
+# define _GL_ATTRIBUTE_FALLTHROUGH __attribute__ ((__fallthrough__))
+#else
+# define _GL_ATTRIBUTE_FALLTHROUGH ((void) 0)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (format)
+# define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
+#else
+# define _GL_ATTRIBUTE_FORMAT(spec)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (leaf)
+# define _GL_ATTRIBUTE_LEAF __attribute__ ((__leaf__))
+#else
+# define _GL_ATTRIBUTE_LEAF
+#endif
+
+#if _GL_HAS_ATTRIBUTE (malloc)
+# define _GL_ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
+#else
+# define _GL_ATTRIBUTE_MALLOC
+#endif
+
+/* Oracle Studio 12.6 mishandles may_alias despite __has_attribute OK.  */
+#if _GL_HAS_ATTRIBUTE (may_alias) && !defined __SUNPRO_C
+# define _GL_ATTRIBUTE_MAY_ALIAS __attribute__ ((__may_alias__))
+#else
+# define _GL_ATTRIBUTE_MAY_ALIAS
+#endif
+
+#if _GL_HAS_C_ATTRIBUTE (maybe_unused)
+# define _GL_ATTRIBUTE_MAYBE_UNUSED [[__maybe_unused__]]
+#else
+# define _GL_ATTRIBUTE_MAYBE_UNUSED _GL_ATTRIBUTE_UNUSED
+#endif
+/* Earlier spellings of this macro.  */
+#define _UNUSED_PARAMETER_ _GL_ATTRIBUTE_MAYBE_UNUSED
+
+#if _GL_HAS_C_ATTRIBUTE (nodiscard)
+# define _GL_ATTRIBUTE_NODISCARD [[__nodiscard__]]
+#elif _GL_HAS_ATTRIBUTE (warn_unused_result)
+# define _GL_ATTRIBUTE_NODISCARD __attribute__ ((__warn_unused_result__))
+#else
+# define _GL_ATTRIBUTE_NODISCARD
+#endif
+
+#if _GL_HAS_ATTRIBUTE (noinline)
+# define _GL_ATTRIBUTE_NOINLINE __attribute__ ((__noinline__))
+#else
+# define _GL_ATTRIBUTE_NOINLINE
+#endif
+
+#if _GL_HAS_ATTRIBUTE (nonnull)
+# define _GL_ATTRIBUTE_NONNULL(args) __attribute__ ((__nonnull__ args))
+#else
+# define _GL_ATTRIBUTE_NONNULL(args)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (nonstring)
+# define _GL_ATTRIBUTE_NONSTRING __attribute__ ((__nonstring__))
+#else
+# define _GL_ATTRIBUTE_NONSTRING
+#endif
+
+/* There is no _GL_ATTRIBUTE_NORETURN; use _Noreturn instead.  */
+
+#if _GL_HAS_ATTRIBUTE (nothrow) && !defined __cplusplus
+# define _GL_ATTRIBUTE_NOTHROW __attribute__ ((__nothrow__))
+#else
+# define _GL_ATTRIBUTE_NOTHROW
+#endif
+
+#if _GL_HAS_ATTRIBUTE (packed)
+# define _GL_ATTRIBUTE_PACKED __attribute__ ((__packed__))
+#else
+# define _GL_ATTRIBUTE_PACKED
+#endif
+
+#if _GL_HAS_ATTRIBUTE (pure)
+# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+#else
+# define _GL_ATTRIBUTE_PURE
+#endif
+
+#if _GL_HAS_ATTRIBUTE (returns_nonnull)
+# define _GL_ATTRIBUTE_RETURNS_NONNULL __attribute__ ((__returns_nonnull__))
+#else
+# define _GL_ATTRIBUTE_RETURNS_NONNULL
+#endif
+
+#if _GL_HAS_ATTRIBUTE (sentinel)
+# define _GL_ATTRIBUTE_SENTINEL(pos) __attribute__ ((__sentinel__ pos))
+#else
+# define _GL_ATTRIBUTE_SENTINEL(pos)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (unused)
+# define _GL_ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+#else
+# define _GL_ATTRIBUTE_UNUSED
+#endif
+/* Earlier spellings of this macro.  */
+#define _GL_UNUSED _GL_ATTRIBUTE_UNUSED
+
+
+/* To support C++ as well as C, use _GL_UNUSED_LABEL with trailing ';'.  */
+#if !defined __cplusplus || _GL_GNUC_PREREQ (4, 5)
+# define _GL_UNUSED_LABEL _GL_ATTRIBUTE_UNUSED
+#else
+# define _GL_UNUSED_LABEL
+#endif
+
+
+/* Define to empty if `const' does not conform to ANSI C. */
+#undef const
+
+/* Please see the Gnulib manual for how to use these macros.
+
+   Suppress extern inline with HP-UX cc, as it appears to be broken; see
+   <https://lists.gnu.org/r/bug-texinfo/2013-02/msg00030.html>.
+
+   Suppress extern inline with Sun C in standards-conformance mode, as it
+   mishandles inline functions that call each other.  E.g., for 'inline void f
+   (void) { } inline void g (void) { f (); }', c99 incorrectly complains
+   'reference to static identifier "f" in extern inline function'.
+   This bug was observed with Sun C 5.12 SunOS_i386 2011/11/16.
+
+   Suppress extern inline (with or without __attribute__ ((__gnu_inline__)))
+   on configurations that mistakenly use 'static inline' to implement
+   functions or macros in standard C headers like <ctype.h>.  For example,
+   if isdigit is mistakenly implemented via a static inline function,
+   a program containing an extern inline function that calls isdigit
+   may not work since the C standard prohibits extern inline functions
+   from calling static functions (ISO C 99 section 6.7.4.(3).
+   This bug is known to occur on:
+
+     OS X 10.8 and earlier; see:
+     https://lists.gnu.org/r/bug-gnulib/2012-12/msg00023.html
+
+     DragonFly; see
+     http://muscles.dragonflybsd.org/bulk/clang-master-potential/20141111_102002/logs/ah-tty-0.3.12.log
+
+     FreeBSD; see:
+     https://lists.gnu.org/r/bug-gnulib/2014-07/msg00104.html
+
+   OS X 10.9 has a macro __header_inline indicating the bug is fixed for C and
+   for clang but remains for g++; see <https://trac.macports.org/ticket/41033>.
+   Assume DragonFly and FreeBSD will be similar.
+
+   GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
+   inline semantics, unless -fgnu89-inline is used.  It defines a macro
+   __GNUC_STDC_INLINE__ to indicate this situation or a macro
+   __GNUC_GNU_INLINE__ to indicate the opposite situation.
+   GCC 4.2 with -std=c99 or -std=gnu99 implements the GNU C inline
+   semantics but warns, unless -fgnu89-inline is used:
+     warning: C99 inline functions are not supported; using GNU89
+     warning: to disable this warning use -fgnu89-inline or the gnu_inline function attribute
+   It defines a macro __GNUC_GNU_INLINE__ to indicate this situation.
+ */
+#if (((defined __APPLE__ && defined __MACH__) \
+      || defined __DragonFly__ || defined __FreeBSD__) \
+     && (defined __header_inline \
+         ? (defined __cplusplus && defined __GNUC_STDC_INLINE__ \
+            && ! defined __clang__) \
+         : ((! defined _DONT_USE_CTYPE_INLINE_ \
+             && (defined __GNUC__ || defined __cplusplus)) \
+            || (defined _FORTIFY_SOURCE && 0 < _FORTIFY_SOURCE \
+                && defined __GNUC__ && ! defined __cplusplus))))
+# define _GL_EXTERN_INLINE_STDHEADER_BUG
+#endif
+#if ((__GNUC__ \
+      ? defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__ \
+      : (199901L <= __STDC_VERSION__ \
+         && !defined __HP_cc \
+         && !defined __PGI \
+         && !(defined __SUNPRO_C && __STDC__))) \
+     && !defined _GL_EXTERN_INLINE_STDHEADER_BUG)
+# define _GL_INLINE inline
+# define _GL_EXTERN_INLINE extern inline
+# define _GL_EXTERN_INLINE_IN_USE
+#elif (2 < __GNUC__ + (7 <= __GNUC_MINOR__) && !defined __STRICT_ANSI__ \
+       && !defined _GL_EXTERN_INLINE_STDHEADER_BUG)
+# if defined __GNUC_GNU_INLINE__ && __GNUC_GNU_INLINE__
+   /* __gnu_inline__ suppresses a GCC 4.2 diagnostic.  */
+#  define _GL_INLINE extern inline __attribute__ ((__gnu_inline__))
+# else
+#  define _GL_INLINE extern inline
+# endif
+# define _GL_EXTERN_INLINE extern
+# define _GL_EXTERN_INLINE_IN_USE
+#else
+# define _GL_INLINE static _GL_UNUSED
+# define _GL_EXTERN_INLINE static _GL_UNUSED
+#endif
+
+/* In GCC 4.6 (inclusive) to 5.1 (exclusive),
+   suppress bogus "no previous prototype for 'FOO'"
+   and "no previous declaration for 'FOO'" diagnostics,
+   when FOO is an inline function in the header; see
+   <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113> and
+   <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63877>.  */
+#if __GNUC__ == 4 && 6 <= __GNUC_MINOR__
+# if defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__
+#  define _GL_INLINE_HEADER_CONST_PRAGMA
+# else
+#  define _GL_INLINE_HEADER_CONST_PRAGMA \
+     _Pragma ("GCC diagnostic ignored \"-Wsuggest-attribute=const\"")
+# endif
+# define _GL_INLINE_HEADER_BEGIN \
+    _Pragma ("GCC diagnostic push") \
+    _Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"") \
+    _Pragma ("GCC diagnostic ignored \"-Wmissing-declarations\"") \
+    _GL_INLINE_HEADER_CONST_PRAGMA
+# define _GL_INLINE_HEADER_END \
+    _Pragma ("GCC diagnostic pop")
+#else
+# define _GL_INLINE_HEADER_BEGIN
+# define _GL_INLINE_HEADER_END
+#endif
+
+/* Define to the overridden function name */
+#undef fts_children
+
+/* Define to the overridden function name */
+#undef fts_close
+
+/* Define to the overridden function name */
+#undef fts_cross_check
+
+/* Define to the overridden function name */
+#undef fts_open
+
+/* Define to the overridden function name */
+#undef fts_read
+
+/* Define to the overridden function name */
+#undef fts_set
+
+/* Define to `int' if <sys/types.h> doesn't define. */
+#undef gid_t
+
+/* A replacement for va_copy, if needed.  */
+#define gl_va_copy(a,b) ((a) = (b))
+
+/* Define to `__inline__' or `__inline' if that's what the C compiler
+   calls it, or to nothing if 'inline' is not supported under any name.  */
+#ifndef __cplusplus
+#undef inline
+#endif
+
+/* Define to long or long long if <stdint.h> and <inttypes.h> don't define. */
+#undef intmax_t
+
+/* Work around a bug in Apple GCC 4.0.1 build 5465: In C99 mode, it supports
+   the ISO C 99 semantics of 'extern inline' (unlike the GNU C semantics of
+   earlier versions), but does not display it by setting __GNUC_STDC_INLINE__.
+   __APPLE__ && __MACH__ test for Mac OS X.
+   __APPLE_CC__ tests for the Apple compiler and its version.
+   __STDC_VERSION__ tests for the C99 mode.  */
+#if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined __cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__
+# define __GNUC_STDC_INLINE__ 1
+#endif
+
+/* Define to 1 if the compiler is checking for lint. */
+#undef lint
+
+/* Define to a type if <wchar.h> does not define. */
+#undef mbstate_t
+
+/* _GL_CMP (n1, n2) performs a three-valued comparison on n1 vs. n2, where
+   n1 and n2 are expressions without side effects, that evaluate to real
+   numbers (excluding NaN).
+   It returns
+     1  if n1 > n2
+     0  if n1 == n2
+     -1 if n1 < n2
+   The naïve code   (n1 > n2 ? 1 : n1 < n2 ? -1 : 0)  produces a conditional
+   jump with nearly all GCC versions up to GCC 10.
+   This variant     (n1 < n2 ? -1 : n1 > n2)  produces a conditional with many
+   GCC versions up to GCC 9.
+   The better code  (n1 > n2) - (n1 < n2)  from Hacker's Delight § 2-9
+   avoids conditional jumps in all GCC versions >= 3.4.  */
+#define _GL_CMP(n1, n2) (((n1) > (n2)) - ((n1) < (n2)))
+
+
+/* Define to `int' if <sys/types.h> does not define. */
+#undef mode_t
+
+/* Define to the type of st_nlink in struct stat, or a supertype. */
+#undef nlink_t
+
+/* Define to `long int' if <sys/types.h> does not define. */
+#undef off_t
+
+/* Define as a signed integer type capable of holding a process identifier. */
+#undef pid_t
+
+/* Define as the type of the result of subtracting two pointers, if the system
+   doesn't define it. */
+#undef ptrdiff_t
+
+/* Define to rpl_re_comp if the replacement should be used. */
+#undef re_comp
+
+/* Define to rpl_re_compile_fastmap if the replacement should be used. */
+#undef re_compile_fastmap
+
+/* Define to rpl_re_compile_pattern if the replacement should be used. */
+#undef re_compile_pattern
+
+/* Define to rpl_re_exec if the replacement should be used. */
+#undef re_exec
+
+/* Define to rpl_re_match if the replacement should be used. */
+#undef re_match
+
+/* Define to rpl_re_match_2 if the replacement should be used. */
+#undef re_match_2
+
+/* Define to rpl_re_search if the replacement should be used. */
+#undef re_search
+
+/* Define to rpl_re_search_2 if the replacement should be used. */
+#undef re_search_2
+
+/* Define to rpl_re_set_registers if the replacement should be used. */
+#undef re_set_registers
+
+/* Define to rpl_re_set_syntax if the replacement should be used. */
+#undef re_set_syntax
+
+/* Define to rpl_re_syntax_options if the replacement should be used. */
+#undef re_syntax_options
+
+/* Define to rpl_regcomp if the replacement should be used. */
+#undef regcomp
+
+/* Define to rpl_regerror if the replacement should be used. */
+#undef regerror
+
+/* Define to rpl_regexec if the replacement should be used. */
+#undef regexec
+
+/* Define to rpl_regfree if the replacement should be used. */
+#undef regfree
+
+/* Define to the equivalent of the C99 'restrict' keyword, or to
+   nothing if this is not supported.  Do not define if restrict is
+   supported only directly.  */
+#undef restrict
+/* Work around a bug in older versions of Sun C++, which did not
+   #define __restrict__ or support _Restrict or __restrict__
+   even though the corresponding Sun C compiler ended up with
+   "#define restrict _Restrict" or "#define restrict __restrict__"
+   in the previous line.  This workaround can be removed once
+   we assume Oracle Developer Studio 12.5 (2016) or later.  */
+#if defined __SUNPRO_CC && !defined __RESTRICT && !defined __restrict__
+# define _Restrict
+# define __restrict__
+#endif
+
+/* Define to `unsigned int' if <sys/types.h> does not define. */
+#undef size_t
+
+/* type to use in place of socklen_t if not defined */
+#undef socklen_t
+
+/* Define as a signed type of the same size as size_t. */
+#undef ssize_t
+
+/* Define to 'struct sigaltstack' if that's the type of the argument to
+   sigaltstack */
+#undef stack_t
+
+/* Define to `int' if <sys/types.h> doesn't define. */
+#undef uid_t
+
+
+  /* This definition is a duplicate of the one in unitypes.h.
+     It is here so that we can cope with an older version of unitypes.h
+     that does not contain this definition and that is pre-installed among
+     the public header files.  */
+  # if defined __restrict \
+       || 2 < __GNUC__ + (95 <= __GNUC_MINOR__) \
+       || __clang_major__ >= 3
+  #  define _UC_RESTRICT __restrict
+  # elif 199901L <= __STDC_VERSION__ || defined restrict
+  #  define _UC_RESTRICT restrict
+  # else
+  #  define _UC_RESTRICT
+  # endif
+  
+
+/* Define as a macro for copying va_list variables. */
+#undef va_copy
diff --git a/src/grep/config.win.h b/src/grep/config.win.h
new file mode 100644
index 0000000..64e241b
--- /dev/null
+++ b/src/grep/config.win.h
@@ -0,0 +1,2594 @@
+/* config.hin.  Manually edited */
+#ifndef INCLUDED_CONFIG_WIN_H
+#define INCLUDED_CONFIG_WIN_H
+
+#if 1
+
+/* HACK ALERT! Make inlined CRT functions static to avoid getting duplicate
+   symbols errors for things like _vprintf_l.  */
+# define _CRT_STDIO_INLINE static __inline
+
+/* HACK ALERT! Ugly ugly hack for making __local_stdio_printf_options static
+   and not to cause stupid stupid duplicate symbols linker errors. */
+# include <corecrt.h>
+# undef _CRT_INLINE_PURE_SECURITYCRITICAL_ATTRIBUTE
+# define _CRT_INLINE_PURE_SECURITYCRITICAL_ATTRIBUTE static
+
+/* HACK ALERT! wchar.h requires __inline temporarily redefined to static _inline or
+   we'll end up with mbsinit wmemchr, wmemcmp, wmemcpy and friends as duplicates.  */
+# include <stdio.h>
+# include <conio.h>
+# include <string.h>
+# include <time.h>
+# include <sys/stat.h>
+# define __inline static _inline
+# include <wchar.h>
+# undef __inline
+
+#endif
+
+/* CPU and C ABI indicator */
+#ifndef __i386__
+#undef __i386__
+#endif
+#ifndef __x86_64_x32__
+#undef __x86_64_x32__
+#endif
+#ifndef __x86_64__
+#undef __x86_64__
+#endif
+#ifndef __alpha__
+#undef __alpha__
+#endif
+#ifndef __arm__
+#undef __arm__
+#endif
+#ifndef __armhf__
+#undef __armhf__
+#endif
+#ifndef __arm64_ilp32__
+#undef __arm64_ilp32__
+#endif
+#ifndef __arm64__
+#undef __arm64__
+#endif
+#ifndef __hppa__
+#undef __hppa__
+#endif
+#ifndef __hppa64__
+#undef __hppa64__
+#endif
+#ifndef __ia64_ilp32__
+#undef __ia64_ilp32__
+#endif
+#ifndef __ia64__
+#undef __ia64__
+#endif
+#ifndef __m68k__
+#undef __m68k__
+#endif
+#ifndef __mips__
+#undef __mips__
+#endif
+#ifndef __mipsn32__
+#undef __mipsn32__
+#endif
+#ifndef __mips64__
+#undef __mips64__
+#endif
+#ifndef __powerpc__
+#undef __powerpc__
+#endif
+#ifndef __powerpc64__
+#undef __powerpc64__
+#endif
+#ifndef __powerpc64_elfv2__
+#undef __powerpc64_elfv2__
+#endif
+#ifndef __riscv32__
+#undef __riscv32__
+#endif
+#ifndef __riscv64__
+#undef __riscv64__
+#endif
+#ifndef __riscv32_ilp32__
+#undef __riscv32_ilp32__
+#endif
+#ifndef __riscv32_ilp32f__
+#undef __riscv32_ilp32f__
+#endif
+#ifndef __riscv32_ilp32d__
+#undef __riscv32_ilp32d__
+#endif
+#ifndef __riscv64_ilp32__
+#undef __riscv64_ilp32__
+#endif
+#ifndef __riscv64_ilp32f__
+#undef __riscv64_ilp32f__
+#endif
+#ifndef __riscv64_ilp32d__
+#undef __riscv64_ilp32d__
+#endif
+#ifndef __riscv64_lp64__
+#undef __riscv64_lp64__
+#endif
+#ifndef __riscv64_lp64f__
+#undef __riscv64_lp64f__
+#endif
+#ifndef __riscv64_lp64d__
+#undef __riscv64_lp64d__
+#endif
+#ifndef __s390__
+#undef __s390__
+#endif
+#ifndef __s390x__
+#undef __s390x__
+#endif
+#ifndef __sh__
+#undef __sh__
+#endif
+#ifndef __sparc__
+#undef __sparc__
+#endif
+#ifndef __sparc64__
+#undef __sparc64__
+#endif
+
+
+/* Define if building universal (internal helper macro) */
+#undef AC_APPLE_UNIVERSAL_BUILD
+
+/* Define to the function xargmatch calls on failures. */
+#undef ARGMATCH_DIE
+
+/* Define to the declaration of the xargmatch failure function. */
+#undef ARGMATCH_DIE_DECL
+
+/* Define to the number of bits in type 'ptrdiff_t'. */
+#undef BITSIZEOF_PTRDIFF_T
+
+/* Define to the number of bits in type 'sig_atomic_t'. */
+#undef BITSIZEOF_SIG_ATOMIC_T
+
+/* Define to the number of bits in type 'size_t'. */
+#undef BITSIZEOF_SIZE_T
+
+/* Define to the number of bits in type 'wchar_t'. */
+#undef BITSIZEOF_WCHAR_T
+
+/* Define to the number of bits in type 'wint_t'. */
+#undef BITSIZEOF_WINT_T
+
+/* Define to 1 if the `closedir' function returns void instead of int. */
+#undef CLOSEDIR_VOID
+
+/* Define to 1 if using 'alloca.c'. */
+#undef C_ALLOCA
+
+/* Define as the bit index in the word where to find bit 0 of the exponent of
+   'double'. */
+#undef DBL_EXPBIT0_BIT
+
+/* Define as the word index where to find the exponent of 'double'. */
+#undef DBL_EXPBIT0_WORD
+
+/* the name of the file descriptor member of DIR */
+#undef DIR_FD_MEMBER_NAME
+
+#ifdef DIR_FD_MEMBER_NAME
+# define DIR_TO_FD(Dir_p) ((Dir_p)->DIR_FD_MEMBER_NAME)
+#else
+# define DIR_TO_FD(Dir_p) -1
+#endif
+
+
+/* Define to 1 if // is a file system root distinct from /. */
+#undef DOUBLE_SLASH_IS_DISTINCT_ROOT
+
+/* Define if struct dirent has a member d_ino that actually works. */
+#undef D_INO_IN_DIRENT
+
+/* Define to 1 if translation of program messages to the user's native
+   language is requested. */
+#undef ENABLE_NLS
+
+/* Define this to 1 if F_DUPFD behavior does not match POSIX */
+#undef FCNTL_DUPFD_BUGGY
+
+/* Define to nothing if C supports flexible array members, and to 1 if it does
+   not. That way, with a declaration like 'struct s { int n; short
+   d[FLEXIBLE_ARRAY_MEMBER]; };', the struct hack can be used with pre-C99
+   compilers. Use 'FLEXSIZEOF (struct s, d, N * sizeof (short))' to calculate
+   the size in bytes of such a struct containing an N-element array. */
+#define FLEXIBLE_ARRAY_MEMBER 1
+
+/* Define to 1 if fopen() fails to recognize a trailing slash. */
+#undef FOPEN_TRAILING_SLASH_BUG
+
+/* Define to 1 if nl_langinfo (YESEXPR) returns a non-empty string. */
+#undef FUNC_NL_LANGINFO_YESEXPR_WORKS
+
+/* Define this to 'void' or 'struct timezone' to match the system's
+   declaration of the second argument to gettimeofday. */
+#undef GETTIMEOFDAY_TIMEZONE
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module close-stream shall be considered present. */
+#undef GNULIB_CLOSE_STREAM
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module fcntl-safer shall be considered present. */
+#undef GNULIB_FCNTL_SAFER
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module fdopendir shall be considered present. */
+#undef GNULIB_FDOPENDIR
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module fd-safer-flag shall be considered present. */
+#undef GNULIB_FD_SAFER_FLAG
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module fopen-gnu shall be considered present. */
+#undef GNULIB_FOPEN_GNU
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module fscanf shall be considered present. */
+#undef GNULIB_FSCANF
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module isblank shall be considered present. */
+#undef GNULIB_ISBLANK
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module lock shall be considered present. */
+#undef GNULIB_LOCK
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module msvc-nothrow shall be considered present. */
+#undef GNULIB_MSVC_NOTHROW
+
+/* Define to 1 to disable use of VLAs */
+#undef GNULIB_NO_VLA
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module openat shall be considered present. */
+#define GNULIB_OPENAT 1
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module openat-safer shall be considered present. */
+#define GNULIB_OPENAT_SAFER 1
+
+/* enable some gnulib portability checks */
+#undef GNULIB_PORTCHECK
+
+/* Enable compile-time and run-time bounds-checking, and some warnings,
+      without upsetting glibc 2.15+. */
+   #if (defined GNULIB_PORTCHECK && !defined _FORTIFY_SOURCE \
+        && defined __OPTIMIZE__ && __OPTIMIZE__)
+   # define _FORTIFY_SOURCE 2
+   #endif
+  
+
+/* Define to 1 if printf and friends should be labeled with attribute
+   "__gnu_printf__" instead of "__printf__" */
+#undef GNULIB_PRINTF_ATTRIBUTE_FLAVOR_GNU
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module reallocarray shall be considered present. */
+#undef GNULIB_REALLOCARRAY
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module scanf shall be considered present. */
+#undef GNULIB_SCANF
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module snprintf shall be considered present. */
+#undef GNULIB_SNPRINTF
+
+/* Define to 1 if you want the FILE stream functions getc, putc, etc. to use
+   unlocked I/O if available, throughout the package. Unlocked I/O can improve
+   performance, sometimes dramatically. But unlocked I/O is safe only in
+   single-threaded programs, as well as in multithreaded programs for which
+   you can guarantee that every FILE stream, including stdin, stdout, stderr,
+   is used only in a single thread. */
+#undef GNULIB_STDIO_SINGLE_THREAD
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module strerror shall be considered present. */
+#undef GNULIB_STRERROR
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module strerror_r-posix shall be considered present. */
+#define GNULIB_STRERROR_R_POSIX 0
+
+/* Define to 1 when the gnulib module accept should be tested. */
+#undef GNULIB_TEST_ACCEPT
+
+/* Define to 1 when the gnulib module bind should be tested. */
+#undef GNULIB_TEST_BIND
+
+/* Define to 1 when the gnulib module btowc should be tested. */
+#undef GNULIB_TEST_BTOWC
+
+/* Define to 1 when the gnulib module calloc-posix should be tested. */
+#undef GNULIB_TEST_CALLOC_POSIX
+
+/* Define to 1 when the gnulib module chdir should be tested. */
+#undef GNULIB_TEST_CHDIR
+
+/* Define to 1 when the gnulib module cloexec should be tested. */
+#undef GNULIB_TEST_CLOEXEC
+
+/* Define to 1 when the gnulib module close should be tested. */
+#undef GNULIB_TEST_CLOSE
+
+/* Define to 1 when the gnulib module closedir should be tested. */
+#undef GNULIB_TEST_CLOSEDIR
+
+/* Define to 1 when the gnulib module connect should be tested. */
+#undef GNULIB_TEST_CONNECT
+
+/* Define to 1 when the gnulib module dirfd should be tested. */
+#undef GNULIB_TEST_DIRFD
+
+/* Define to 1 when the gnulib module dup should be tested. */
+#undef GNULIB_TEST_DUP
+
+/* Define to 1 when the gnulib module dup2 should be tested. */
+#undef GNULIB_TEST_DUP2
+
+/* Define to 1 when the gnulib module environ should be tested. */
+#undef GNULIB_TEST_ENVIRON
+
+/* Define to 1 when the gnulib module fchdir should be tested. */
+#undef GNULIB_TEST_FCHDIR
+
+/* Define to 1 when the gnulib module fcntl should be tested. */
+#undef GNULIB_TEST_FCNTL
+
+/* Define to 1 when the gnulib module fdopen should be tested. */
+#undef GNULIB_TEST_FDOPEN
+
+/* Define to 1 when the gnulib module fdopendir should be tested. */
+#undef GNULIB_TEST_FDOPENDIR
+
+/* Define to 1 when the gnulib module fgetc should be tested. */
+#undef GNULIB_TEST_FGETC
+
+/* Define to 1 when the gnulib module fgets should be tested. */
+#undef GNULIB_TEST_FGETS
+
+/* Define to 1 when the gnulib module fnmatch should be tested. */
+#undef GNULIB_TEST_FNMATCH
+
+/* Define to 1 when the gnulib module fopen should be tested. */
+#undef GNULIB_TEST_FOPEN
+
+/* Define to 1 when the gnulib module fprintf should be tested. */
+#undef GNULIB_TEST_FPRINTF
+
+/* Define to 1 when the gnulib module fputc should be tested. */
+#undef GNULIB_TEST_FPUTC
+
+/* Define to 1 when the gnulib module fputs should be tested. */
+#undef GNULIB_TEST_FPUTS
+
+/* Define to 1 when the gnulib module fread should be tested. */
+#undef GNULIB_TEST_FREAD
+
+/* Define to 1 when the gnulib module free-posix should be tested. */
+#undef GNULIB_TEST_FREE_POSIX
+
+/* Define to 1 when the gnulib module fscanf should be tested. */
+#undef GNULIB_TEST_FSCANF
+
+/* Define to 1 when the gnulib module fstat should be tested. */
+#undef GNULIB_TEST_FSTAT
+
+/* Define to 1 when the gnulib module fstatat should be tested. */
+#undef GNULIB_TEST_FSTATAT
+
+/* Define to 1 when the gnulib module ftruncate should be tested. */
+#undef GNULIB_TEST_FTRUNCATE
+
+/* Define to 1 when the gnulib module fwrite should be tested. */
+#undef GNULIB_TEST_FWRITE
+
+/* Define to 1 when the gnulib module getc should be tested. */
+#undef GNULIB_TEST_GETC
+
+/* Define to 1 when the gnulib module getchar should be tested. */
+#undef GNULIB_TEST_GETCHAR
+
+/* Define to 1 when the gnulib module getcwd should be tested. */
+#undef GNULIB_TEST_GETCWD
+
+/* Define to 1 when the gnulib module getdtablesize should be tested. */
+#undef GNULIB_TEST_GETDTABLESIZE
+
+/* Define to 1 when the gnulib module getopt-posix should be tested. */
+#undef GNULIB_TEST_GETOPT_POSIX
+
+/* Define to 1 when the gnulib module getpagesize should be tested. */
+#undef GNULIB_TEST_GETPAGESIZE
+
+/* Define to 1 when the gnulib module gettimeofday should be tested. */
+#undef GNULIB_TEST_GETTIMEOFDAY
+
+/* Define to 1 when the gnulib module ioctl should be tested. */
+#undef GNULIB_TEST_IOCTL
+
+/* Define to 1 when the gnulib module isatty should be tested. */
+#undef GNULIB_TEST_ISATTY
+
+/* Define to 1 when the gnulib module iswblank should be tested. */
+#undef GNULIB_TEST_ISWBLANK
+
+/* Define to 1 when the gnulib module iswctype should be tested. */
+#undef GNULIB_TEST_ISWCTYPE
+
+/* Define to 1 when the gnulib module iswdigit should be tested. */
+#undef GNULIB_TEST_ISWDIGIT
+
+/* Define to 1 when the gnulib module iswxdigit should be tested. */
+#undef GNULIB_TEST_ISWXDIGIT
+
+/* Define to 1 when the gnulib module listen should be tested. */
+#undef GNULIB_TEST_LISTEN
+
+/* Define to 1 when the gnulib module localeconv should be tested. */
+#undef GNULIB_TEST_LOCALECONV
+
+/* Define to 1 when the gnulib module localename should be tested. */
+#undef GNULIB_TEST_LOCALENAME
+
+/* Define to 1 when the gnulib module lseek should be tested. */
+#undef GNULIB_TEST_LSEEK
+
+/* Define to 1 when the gnulib module lstat should be tested. */
+#undef GNULIB_TEST_LSTAT
+
+/* Define to 1 when the gnulib module malloc-posix should be tested. */
+#undef GNULIB_TEST_MALLOC_POSIX
+
+/* Define to 1 when the gnulib module mbrlen should be tested. */
+#undef GNULIB_TEST_MBRLEN
+
+/* Define to 1 when the gnulib module mbrtowc should be tested. */
+#undef GNULIB_TEST_MBRTOWC
+
+/* Define to 1 when the gnulib module mbscasecmp should be tested. */
+#undef GNULIB_TEST_MBSCASECMP
+
+/* Define to 1 when the gnulib module mbsinit should be tested. */
+#undef GNULIB_TEST_MBSINIT
+
+/* Define to 1 when the gnulib module mbslen should be tested. */
+#undef GNULIB_TEST_MBSLEN
+
+/* Define to 1 when the gnulib module mbsrtowcs should be tested. */
+#undef GNULIB_TEST_MBSRTOWCS
+
+/* Define to 1 when the gnulib module mbsstr should be tested. */
+#undef GNULIB_TEST_MBSSTR
+
+/* Define to 1 when the gnulib module mbtowc should be tested. */
+#undef GNULIB_TEST_MBTOWC
+
+/* Define to 1 when the gnulib module memchr should be tested. */
+#undef GNULIB_TEST_MEMCHR
+
+/* Define to 1 when the gnulib module mempcpy should be tested. */
+#undef GNULIB_TEST_MEMPCPY
+
+/* Define to 1 when the gnulib module memrchr should be tested. */
+#undef GNULIB_TEST_MEMRCHR
+
+/* Define to 1 when the gnulib module nanosleep should be tested. */
+#undef GNULIB_TEST_NANOSLEEP
+
+/* Define to 1 when the gnulib module nl_langinfo should be tested. */
+#undef GNULIB_TEST_NL_LANGINFO
+
+/* Define to 1 when the gnulib module open should be tested. */
+#undef GNULIB_TEST_OPEN
+
+/* Define to 1 when the gnulib module openat should be tested. */
+#undef GNULIB_TEST_OPENAT
+
+/* Define to 1 when the gnulib module opendir should be tested. */
+#undef GNULIB_TEST_OPENDIR
+
+/* Define to 1 when the gnulib module perror should be tested. */
+#undef GNULIB_TEST_PERROR
+
+/* Define to 1 when the gnulib module pipe should be tested. */
+#undef GNULIB_TEST_PIPE
+
+/* Define to 1 when the gnulib module printf should be tested. */
+#undef GNULIB_TEST_PRINTF
+
+/* Define to 1 when the gnulib module pthread_sigmask should be tested. */
+#undef GNULIB_TEST_PTHREAD_SIGMASK
+
+/* Define to 1 when the gnulib module pthread-thread should be tested. */
+#undef GNULIB_TEST_PTHREAD_THREAD
+
+/* Define to 1 when the gnulib module putc should be tested. */
+#undef GNULIB_TEST_PUTC
+
+/* Define to 1 when the gnulib module putchar should be tested. */
+#undef GNULIB_TEST_PUTCHAR
+
+/* Define to 1 when the gnulib module putenv should be tested. */
+#undef GNULIB_TEST_PUTENV
+
+/* Define to 1 when the gnulib module puts should be tested. */
+#undef GNULIB_TEST_PUTS
+
+/* Define to 1 when the gnulib module raise should be tested. */
+#undef GNULIB_TEST_RAISE
+
+/* Define to 1 when the gnulib module rawmemchr should be tested. */
+#undef GNULIB_TEST_RAWMEMCHR
+
+/* Define to 1 when the gnulib module read should be tested. */
+#undef GNULIB_TEST_READ
+
+/* Define to 1 when the gnulib module readdir should be tested. */
+#undef GNULIB_TEST_READDIR
+
+/* Define to 1 when the gnulib module reallocarray should be tested. */
+#undef GNULIB_TEST_REALLOCARRAY
+
+/* Define to 1 when the gnulib module realloc-posix should be tested. */
+#undef GNULIB_TEST_REALLOC_POSIX
+
+/* Define to 1 when the gnulib module scanf should be tested. */
+#undef GNULIB_TEST_SCANF
+
+/* Define to 1 when the gnulib module select should be tested. */
+#undef GNULIB_TEST_SELECT
+
+/* Define to 1 when the gnulib module setenv should be tested. */
+#undef GNULIB_TEST_SETENV
+
+/* Define to 1 when the gnulib module setlocale should be tested. */
+#undef GNULIB_TEST_SETLOCALE
+
+/* Define to 1 when the gnulib module setlocale_null should be tested. */
+#undef GNULIB_TEST_SETLOCALE_NULL
+
+/* Define to 1 when the gnulib module setsockopt should be tested. */
+#undef GNULIB_TEST_SETSOCKOPT
+
+/* Define to 1 when the gnulib module sigaction should be tested. */
+#undef GNULIB_TEST_SIGACTION
+
+/* Define to 1 when the gnulib module sigprocmask should be tested. */
+#undef GNULIB_TEST_SIGPROCMASK
+
+/* Define to 1 when the gnulib module sleep should be tested. */
+#undef GNULIB_TEST_SLEEP
+
+/* Define to 1 when the gnulib module snprintf should be tested. */
+#undef GNULIB_TEST_SNPRINTF
+
+/* Define to 1 when the gnulib module socket should be tested. */
+#undef GNULIB_TEST_SOCKET
+
+/* Define to 1 when the gnulib module stat should be tested. */
+#undef GNULIB_TEST_STAT
+
+/* Define to 1 when the gnulib module stpcpy should be tested. */
+#undef GNULIB_TEST_STPCPY
+
+/* Define to 1 when the gnulib module strdup should be tested. */
+#undef GNULIB_TEST_STRDUP
+
+/* Define to 1 when the gnulib module strerror should be tested. */
+#undef GNULIB_TEST_STRERROR
+
+/* Define to 1 when the gnulib module strerror_r should be tested. */
+#undef GNULIB_TEST_STRERROR_R
+
+/* Define to 1 when the gnulib module strnlen should be tested. */
+#undef GNULIB_TEST_STRNLEN
+
+/* Define to 1 when the gnulib module strstr should be tested. */
+#undef GNULIB_TEST_STRSTR
+
+/* Define to 1 when the gnulib module strtoll should be tested. */
+#undef GNULIB_TEST_STRTOLL
+
+/* Define to 1 when the gnulib module strtoull should be tested. */
+#undef GNULIB_TEST_STRTOULL
+
+/* Define to 1 when the gnulib module symlink should be tested. */
+#undef GNULIB_TEST_SYMLINK
+
+/* Define to 1 when the gnulib module unsetenv should be tested. */
+#undef GNULIB_TEST_UNSETENV
+
+/* Define to 1 when the gnulib module vfprintf should be tested. */
+#undef GNULIB_TEST_VFPRINTF
+
+/* Define to 1 when the gnulib module vprintf should be tested. */
+#undef GNULIB_TEST_VPRINTF
+
+/* Define to 1 when the gnulib module wcrtomb should be tested. */
+#undef GNULIB_TEST_WCRTOMB
+
+/* Define to 1 when the gnulib module wctob should be tested. */
+#undef GNULIB_TEST_WCTOB
+
+/* Define to 1 when the gnulib module wctomb should be tested. */
+#undef GNULIB_TEST_WCTOMB
+
+/* Define to 1 when the gnulib module wcwidth should be tested. */
+#undef GNULIB_TEST_WCWIDTH
+
+/* Define to 1 when the gnulib module wmemchr should be tested. */
+#undef GNULIB_TEST_WMEMCHR
+
+/* Define to 1 when the gnulib module wmempcpy should be tested. */
+#undef GNULIB_TEST_WMEMPCPY
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module unistr/u8-mbtoucr shall be considered present. */
+#undef GNULIB_UNISTR_U8_MBTOUCR
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module unistr/u8-uctomb shall be considered present. */
+#undef GNULIB_UNISTR_U8_UCTOMB
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module xalloc shall be considered present. */
+#define GNULIB_XALLOC 1
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module xalloc-die shall be considered present. */
+#define GNULIB_XALLOC_DIE 1
+
+/* We are building grep */
+#define GREP
+
+/* Define to 1 if you have 'alloca' after including <alloca.h>, a header that
+   may be supplied by this distribution. */
+#undef HAVE_ALLOCA
+
+/* Define to 1 if <alloca.h> works. */
+#undef HAVE_ALLOCA_H
+
+/* Define to 1 if you have the <arpa/inet.h> header file. */
+#undef HAVE_ARPA_INET_H
+
+/* Define to 1 if you have the <bp-sym.h> header file. */
+#undef HAVE_BP_SYM_H
+
+/* Define to 1 if you have the `btowc' function. */
+#undef HAVE_BTOWC
+
+/* Define to 1 if nanosleep mishandles large arguments. */
+#undef HAVE_BUG_BIG_NANOSLEEP
+
+/* Define to 1 if you have the `catgets' function. */
+#undef HAVE_CATGETS
+
+/* Define to 1 if you have the Mac OS X function
+   CFLocaleCopyPreferredLanguages in the CoreFoundation framework. */
+#undef HAVE_CFLOCALECOPYPREFERREDLANGUAGES
+
+/* Define to 1 if you have the Mac OS X function CFPreferencesCopyAppValue in
+   the CoreFoundation framework. */
+#undef HAVE_CFPREFERENCESCOPYAPPVALUE
+
+/* Define to 1 if you have the `closedir' function. */
+#define HAVE_CLOSEDIR 1
+
+/* Define to 1 if you have the <crtdefs.h> header file. */
+#undef HAVE_CRTDEFS_H
+
+/* Define if the GNU dcgettext() function is already present or preinstalled.
+   */
+#undef HAVE_DCGETTEXT
+
+/* Define to 1 if you have the declaration of `alarm', and to 0 if you don't.
+   */
+#undef HAVE_DECL_ALARM
+
+/* Define to 1 if you have the declaration of `clearerr_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_CLEARERR_UNLOCKED
+
+/* Define to 1 if you have the declaration of `dirfd', and to 0 if you don't.
+   */
+#undef HAVE_DECL_DIRFD
+
+/* Define to 1 if you have the declaration of `ecvt', and to 0 if you don't.
+   */
+#undef HAVE_DECL_ECVT
+
+/* Define to 1 if you have the declaration of `execvpe', and to 0 if you
+   don't. */
+#undef HAVE_DECL_EXECVPE
+
+/* Define to 1 if you have the declaration of `fchdir', and to 0 if you don't.
+   */
+#define HAVE_DECL_FCHDIR 0
+
+/* Define to 1 if you have the declaration of `fcloseall', and to 0 if you
+   don't. */
+#undef HAVE_DECL_FCLOSEALL
+
+/* Define to 1 if you have the declaration of `fcvt', and to 0 if you don't.
+   */
+#undef HAVE_DECL_FCVT
+
+/* Define to 1 if you have the declaration of `fdopendir', and to 0 if you
+   don't. */
+#undef HAVE_DECL_FDOPENDIR
+
+/* Define to 1 if you have the declaration of `feof_unlocked', and to 0 if you
+   don't. */
+#undef HAVE_DECL_FEOF_UNLOCKED
+
+/* Define to 1 if you have the declaration of `ferror_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_FERROR_UNLOCKED
+
+/* Define to 1 if you have the declaration of `fflush_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_FFLUSH_UNLOCKED
+
+/* Define to 1 if you have the declaration of `fgets_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_FGETS_UNLOCKED
+
+/* Define to 1 if you have the declaration of `fputc_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_FPUTC_UNLOCKED
+
+/* Define to 1 if you have the declaration of `fputs_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_FPUTS_UNLOCKED
+
+/* Define to 1 if you have the declaration of `fread_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_FREAD_UNLOCKED
+
+/* Define to 1 if you have the declaration of `fwrite_unlocked', and to 0 if
+   you don't. */
+#undef HAVE_DECL_FWRITE_UNLOCKED
+
+/* Define to 1 if you have the declaration of `gcvt', and to 0 if you don't.
+   */
+#undef HAVE_DECL_GCVT
+
+/* Define to 1 if you have the declaration of `getchar_unlocked', and to 0 if
+   you don't. */
+#define HAVE_DECL_GETCHAR_UNLOCKED 0
+
+/* Define to 1 if you have the declaration of `getc_unlocked', and to 0 if you
+   don't. */
+#define HAVE_DECL_GETC_UNLOCKED 0
+
+/* Define to 1 if you have the declaration of `getdtablesize', and to 0 if you
+   don't. */
+#undef HAVE_DECL_GETDTABLESIZE
+
+/* Define to 1 if you have the declaration of `inet_pton', and to 0 if you
+   don't. */
+#undef HAVE_DECL_INET_PTON
+
+/* Define to 1 if you have the declaration of `isblank', and to 0 if you
+   don't. */
+#define HAVE_DECL_ISBLANK 0
+
+/* Define to 1 if you have the declaration of `iswblank', and to 0 if you
+   don't. */
+#define HAVE_DECL_ISWBLANK 1
+
+/* Define to 1 if you have the declaration of `mbrlen', and to 0 if you don't.
+   */
+#define HAVE_DECL_MBRLEN 1
+
+/* Define to 1 if you have the declaration of `mbrtowc', and to 0 if you
+   don't. */
+#define HAVE_DECL_MBRTOWC 1
+
+/* Define to 1 if you have the declaration of `mbsinit', and to 0 if you
+   don't. */
+#define HAVE_DECL_MBSINIT 0
+
+/* Define to 1 if you have the declaration of `mbsrtowcs', and to 0 if you
+   don't. */
+#define HAVE_DECL_MBSRTOWCS 0
+
+/* Define to 1 if you have the declaration of `memrchr', and to 0 if you
+   don't. */
+#define HAVE_DECL_MEMRCHR 0
+
+/* Define to 1 if you have the declaration of `program_invocation_name', and
+   to 0 if you don't. */
+#define HAVE_DECL_PROGRAM_INVOCATION_NAME 0
+
+/* Define to 1 if you have the declaration of `program_invocation_short_name',
+   and to 0 if you don't. */
+#define HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME 0
+
+/* Define to 1 if you have the declaration of `putchar_unlocked', and to 0 if
+   you don't. */
+#define HAVE_DECL_PUTCHAR_UNLOCKED 0
+
+/* Define to 1 if you have the declaration of `putc_unlocked', and to 0 if you
+   don't. */
+#define HAVE_DECL_PUTC_UNLOCKED 0
+
+/* Define to 1 if you have the declaration of `setenv', and to 0 if you don't.
+   */
+#define HAVE_DECL_SETENV 0
+
+/* Define to 1 if you have the declaration of `sleep', and to 0 if you don't.
+   */
+#define HAVE_DECL_SLEEP 0
+
+/* Define to 1 if you have the declaration of `snprintf', and to 0 if you
+   don't. */
+#define HAVE_DECL_SNPRINTF 1
+
+/* Define to 1 if you have the declaration of `strdup', and to 0 if you don't.
+   */
+#define HAVE_DECL_STRDUP 1
+
+/* Define to 1 if you have the declaration of `strerror_r', and to 0 if you
+   don't. */
+#define HAVE_DECL_STRERROR_R 1
+
+/* Define to 1 if you have the declaration of `strnlen', and to 0 if you
+   don't. */
+#define HAVE_DECL_STRNLEN 1
+
+/* Define to 1 if you have the declaration of `strtoimax', and to 0 if you
+   don't. */
+#define HAVE_DECL_STRTOIMAX 1
+
+/* Define to 1 if you have the declaration of `strtoll', and to 0 if you
+   don't. */
+#define HAVE_DECL_STRTOLL 1
+
+/* Define to 1 if you have the declaration of `strtoull', and to 0 if you
+   don't. */
+#define HAVE_DECL_STRTOULL 1
+
+/* Define to 1 if you have the declaration of `strtoumax', and to 0 if you
+   don't. */
+#define HAVE_DECL_STRTOUMAX 1
+
+/* Define to 1 if you have the declaration of `towlower', and to 0 if you
+   don't. */
+#define HAVE_DECL_TOWLOWER 1
+
+/* Define to 1 if you have the declaration of `unsetenv', and to 0 if you
+   don't. */
+#define HAVE_DECL_UNSETENV 0
+
+/* Define to 1 if you have the declaration of `wcrtomb', and to 0 if you
+   don't. */
+#define HAVE_DECL_WCRTOMB 0
+
+/* Define to 1 if you have the declaration of `wcsdup', and to 0 if you don't.
+   */
+#define HAVE_DECL_WCSDUP 1
+
+/* Define to 1 if you have the declaration of `wctob', and to 0 if you don't.
+   */
+#define HAVE_DECL_WCTOB 1
+
+/* Define to 1 if you have the declaration of `wcwidth', and to 0 if you
+   don't. */
+#define HAVE_DECL_WCWIDTH 0
+
+/* Define to 1 if you have the declaration of `_putenv', and to 0 if you
+   don't. */
+#define HAVE_DECL__PUTENV 1
+
+/* Define to 1 if you have the declaration of `_snprintf', and to 0 if you
+   don't. */
+#undef HAVE_DECL__SNPRINTF
+
+/* Define to 1 if you have the declaration of `__argv', and to 0 if you don't.
+   */
+#define HAVE_DECL___ARGV 1
+
+/* Define to 1 if you have the declaration of `__fpending', and to 0 if you
+   don't. */
+#define HAVE_DECL___FPENDING 0
+
+/* Define to 1 if you have the <dirent.h> header file, and it defines `DIR'.
+   */
+#undef HAVE_DIRENT_H
+
+/* Define to 1 if you have the `dirfd' function. */
+#undef HAVE_DIRFD
+
+/* Define to 1 if you have the `duplocale' function. */
+#undef HAVE_DUPLOCALE
+
+/* Define if you have the declaration of environ. */
+#undef HAVE_ENVIRON_DECL
+
+/* Define if the locale_t type contains insufficient information, as on
+   OpenBSD. */
+#undef HAVE_FAKE_LOCALES
+
+/* Define to 1 if you have the `fchdir' function. */
+#undef HAVE_FCHDIR
+
+/* Define to 1 if you have the `fcntl' function. */
+#undef HAVE_FCNTL
+
+/* Define to 1 if you have the `fdopendir' function. */
+#undef HAVE_FDOPENDIR
+
+/* Define to 1 if you have the <features.h> header file. */
+#undef HAVE_FEATURES_H
+
+/* Define to 1 if you have the `fnmatch' function. */
+#undef HAVE_FNMATCH
+
+/* Define to 1 if you have the <fnmatch.h> header file. */
+#undef HAVE_FNMATCH_H
+
+/* Define to 1 if you have the `freelocale' function. */
+#undef HAVE_FREELOCALE
+
+/* Define if the 'free' function is guaranteed to preserve errno. */
+#undef HAVE_FREE_POSIX
+
+/* Define to 1 if you have the `fstatat' function. */
+#undef HAVE_FSTATAT
+
+/* Define to 1 if you have the `fstatfs' function. */
+#undef HAVE_FSTATFS
+
+/* Define to 1 if you have the `ftruncate' function. */
+#undef HAVE_FTRUNCATE
+
+/* Define to 1 if you have the `getdtablesize' function. */
+#undef HAVE_GETDTABLESIZE
+
+/* Define to 1 if you have the `getexecname' function. */
+#undef HAVE_GETEXECNAME
+
+/* Define to 1 if you have the `getlocalename_l' function. */
+#undef HAVE_GETLOCALENAME_L
+
+/* Define to 1 if you have the <getopt.h> header file. */
+#undef HAVE_GETOPT_H
+
+/* Define to 1 if you have the `getopt_long_only' function. */
+#undef HAVE_GETOPT_LONG_ONLY
+
+/* Define to 1 if you have the `getprogname' function. */
+#define HAVE_GETPROGNAME 1
+const char *getprogname(void);
+
+/* Define to 1 if you have the `getrlimit' function. */
+#undef HAVE_GETRLIMIT
+
+/* Define if the GNU gettext() function is already present or preinstalled. */
+#undef HAVE_GETTEXT
+
+/* Define to 1 if you have the `gettimeofday' function. */
+#undef HAVE_GETTIMEOFDAY
+
+/* Define if the uselocale exists, may be safely called, and returns
+   sufficient information. */
+#undef HAVE_GOOD_USELOCALE
+
+/* Define if you have the iconv() function and it works. */
+#undef HAVE_ICONV
+
+/* Define to 1 if you have the <iconv.h> header file. */
+#undef HAVE_ICONV_H
+
+/* Define to 1 if you have the `inet_pton' function. */
+#undef HAVE_INET_PTON
+
+/* Define to 1 if the compiler supports one of the keywords 'inline',
+   '__inline__', '__inline' and effectively inlines functions marked as such.
+   */
+#undef HAVE_INLINE
+
+/* Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>. */
+#undef HAVE_INTMAX_T
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#undef HAVE_INTTYPES_H
+
+/* Define if <inttypes.h> exists, doesn't clash with <sys/types.h>, and
+   declares uintmax_t. */
+#undef HAVE_INTTYPES_H_WITH_UINTMAX
+
+/* Define to 1 if you have the `ioctl' function. */
+#undef HAVE_IOCTL
+
+/* Define to 1 if <sys/socket.h> defines AF_INET. */
+#undef HAVE_IPV4
+
+/* Define to 1 if <sys/socket.h> defines AF_INET6. */
+#undef HAVE_IPV6
+
+/* Define to 1 if you have the `isascii' function. */
+#undef HAVE_ISASCII
+
+/* Define to 1 if you have the `isblank' function. */
+#undef HAVE_ISBLANK
+
+/* Define to 1 if you have the `iswblank' function. */
+#undef HAVE_ISWBLANK
+
+/* Define to 1 if you have the `iswcntrl' function. */
+#undef HAVE_ISWCNTRL
+
+/* Define to 1 if you have the `iswctype' function. */
+#undef HAVE_ISWCTYPE
+
+/* Define if you have <langinfo.h> and nl_langinfo(CODESET). */
+#undef HAVE_LANGINFO_CODESET
+
+/* Define to 1 if you have the <langinfo.h> header file. */
+#undef HAVE_LANGINFO_H
+
+/* Define if your <locale.h> file defines LC_MESSAGES. */
+#undef HAVE_LC_MESSAGES
+
+/* Define to 1 if you have the <libintl.h> header file. */
+#undef HAVE_LIBINTL_H
+
+/* Define to 1 if you have the Perl Compatible Regular Expressions library
+   (-lpcre). */
+#undef HAVE_LIBPCRE
+
+/* Define if you have the libsigsegv library. */
+#undef HAVE_LIBSIGSEGV
+
+/* Define to 1 if you have the <limits.h> header file. */
+#undef HAVE_LIMITS_H
+
+/* Define to 1 if the system has the type 'long long int'. */
+#undef HAVE_LONG_LONG_INT
+
+/* Define to 1 if you have the `lstat' function. */
+#undef HAVE_LSTAT
+
+/* Define to 1 if you have the <malloc.h> header file. */
+#undef HAVE_MALLOC_H
+
+/* Define if malloc, realloc, and calloc set errno on allocation failure. */
+#undef HAVE_MALLOC_POSIX
+
+/* Define to 1 if mmap()'s MAP_ANONYMOUS flag is available after including
+   config.h and <sys/mman.h>. */
+#undef HAVE_MAP_ANONYMOUS
+
+/* Define to 1 if you have the `mbrlen' function. */
+#undef HAVE_MBRLEN
+
+/* Define to 1 if you have the `mbrtowc' function. */
+#undef HAVE_MBRTOWC
+
+/* Define to 1 if you have the `mbsinit' function. */
+#undef HAVE_MBSINIT
+
+/* Define to 1 if you have the `mbslen' function. */
+#undef HAVE_MBSLEN
+
+/* Define to 1 if you have the `mbsrtowcs' function. */
+#undef HAVE_MBSRTOWCS
+
+/* Define to 1 if <wchar.h> declares mbstate_t. */
+#undef HAVE_MBSTATE_T
+
+/* Define to 1 if you have the `mbtowc' function. */
+#undef HAVE_MBTOWC
+
+/* Define to 1 if you have the `mempcpy' function. */
+#define HAVE_MEMPCPY 1
+
+#include <string.h>
+static _inline void *mempcpy(void *pvDst, const void *pvSrc, size_t cb)
+{
+    return (char *)memcpy(pvDst, pvSrc, cb) + cb;
+}
+
+/* Define to 1 if you have the `memrchr' function. */
+#undef HAVE_MEMRCHR
+void *memrchr(const void *, int, size_t);
+
+/* Define to 1 if you have the <minix/config.h> header file. */
+#undef HAVE_MINIX_CONFIG_H
+
+/* Define to 1 if <limits.h> defines the MIN and MAX macros. */
+#undef HAVE_MINMAX_IN_LIMITS_H
+
+/* Define to 1 if <sys/param.h> defines the MIN and MAX macros. */
+#undef HAVE_MINMAX_IN_SYS_PARAM_H
+
+/* Define to 1 if you have the `mprotect' function. */
+#undef HAVE_MPROTECT
+
+/* Define to 1 on MSVC platforms that have the "invalid parameter handler"
+   concept. */
+#undef HAVE_MSVC_INVALID_PARAMETER_HANDLER
+
+/* Define if the locale_t type does not contain the name of each locale
+   category. */
+#undef HAVE_NAMELESS_LOCALES
+
+/* Define to 1 if you have the <ndir.h> header file, and it defines `DIR'. */
+#undef HAVE_NDIR_H
+
+/* Define to 1 if you have the <netdb.h> header file. */
+#undef HAVE_NETDB_H
+
+/* Define to 1 if you have the <netinet/in.h> header file. */
+#undef HAVE_NETINET_IN_H
+
+/* Define to 1 if you have the `newlocale' function. */
+#undef HAVE_NEWLOCALE
+
+/* Define to 1 if you have the `nl_langinfo' function. */
+#undef HAVE_NL_LANGINFO
+
+/* Define to 1 if the system has obstacks that work with any size object. */
+#undef HAVE_OBSTACK
+
+/* Define to 1 if you have the `openat' function. */
+#define HAVE_OPENAT 1
+
+/* Define to 1 if you have the `opendir' function. */
+#define HAVE_OPENDIR 1
+
+/* Define to 1 if you have the <OS.h> header file. */
+#undef HAVE_OS_H
+
+/* Define to 1 if you have the `pipe' function. */
+#undef HAVE_PIPE
+
+/* Define if you have the <pthread.h> header and the POSIX threads API. */
+#undef HAVE_PTHREAD_API
+
+/* Define to 1 if you have the `pthread_atfork' function. */
+#undef HAVE_PTHREAD_ATFORK
+
+/* Define to 1 if you have the <pthread.h> header file. */
+#undef HAVE_PTHREAD_H
+
+/* Define if the <pthread.h> defines PTHREAD_MUTEX_RECURSIVE. */
+#undef HAVE_PTHREAD_MUTEX_RECURSIVE
+
+/* Define if the POSIX multithreading library has read/write locks. */
+#undef HAVE_PTHREAD_RWLOCK
+
+/* Define if the 'pthread_rwlock_rdlock' function prefers a writer to a
+   reader. */
+#undef HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER
+
+/* Define to 1 if the pthread_sigmask function can be used (despite bugs). */
+#undef HAVE_PTHREAD_SIGMASK
+
+/* Define to 1 if the system has the type `pthread_spinlock_t'. */
+#undef HAVE_PTHREAD_SPINLOCK_T
+
+/* Define to 1 if the system has the type `pthread_t'. */
+#undef HAVE_PTHREAD_T
+
+/* Define to 1 if you have the `raise' function. */
+#undef HAVE_RAISE
+
+/* Define to 1 if you have the `rawmemchr' function. */
+#define HAVE_RAWMEMCHR 1
+
+
+#include <string.h>
+static _inline void *rawmemchr(const void *pv, int ch)
+{
+    return memchr(pv, ch, ~(size_t)0 / 4);
+}
+
+/* Define to 1 if you have the `readdir' function. */
+#define HAVE_READDIR 1
+
+/* Define to 1 if you have the `reallocarray' function. */
+#undef HAVE_REALLOCARRAY
+
+/* Define to 1 if the system has the type `sa_family_t'. */
+#undef HAVE_SA_FAMILY_T
+
+/* Define to 1 if you have the <sched.h> header file. */
+#undef HAVE_SCHED_H
+
+/* Define to 1 if you have the <sdkddkver.h> header file. */
+#undef HAVE_SDKDDKVER_H
+
+/* Define to 1 if you have the <search.h> header file. */
+#undef HAVE_SEARCH_H
+
+/* Define to 1 if you have the `setdtablesize' function. */
+#undef HAVE_SETDTABLESIZE
+
+/* Define to 1 if you have the `setenv' function. */
+#undef HAVE_SETENV
+
+/* Define to 1 if you have the `setlocale' function. */
+#define HAVE_SETLOCALE 1
+
+/* Define to 1 if you have the `setrlimit' function. */
+#undef HAVE_SETRLIMIT
+
+/* Define to 1 if you have the `shutdown' function. */
+#undef HAVE_SHUTDOWN
+
+/* Define to 1 if you have the `sigaction' function. */
+#undef HAVE_SIGACTION
+
+/* Define to 1 if you have the `sigaltstack' function. */
+#undef HAVE_SIGALTSTACK
+
+/* Define to 1 if the system has the type `siginfo_t'. */
+#undef HAVE_SIGINFO_T
+
+/* Define to 1 if you have the `siginterrupt' function. */
+#undef HAVE_SIGINTERRUPT
+
+/* Define to 1 if 'sig_atomic_t' is a signed integer type. */
+#undef HAVE_SIGNED_SIG_ATOMIC_T
+
+/* Define to 1 if 'wchar_t' is a signed integer type. */
+#undef HAVE_SIGNED_WCHAR_T
+
+/* Define to 1 if 'wint_t' is a signed integer type. */
+#undef HAVE_SIGNED_WINT_T
+
+/* Define to 1 if the system has the type `sigset_t'. */
+#undef HAVE_SIGSET_T
+
+/* Define to 1 if you have the `sleep' function. */
+#undef HAVE_SLEEP
+
+/* Define to 1 if you have the `snprintf' function. */
+#undef HAVE_SNPRINTF
+
+/* Define if the return value of the snprintf function is the number of of
+   bytes (excluding the terminating NUL) that would have been produced if the
+   buffer had been large enough. */
+#undef HAVE_SNPRINTF_RETVAL_C99
+
+/* Define if the string produced by the snprintf function is always NUL
+   terminated. */
+#undef HAVE_SNPRINTF_TRUNCATION_C99
+
+/* Define if the locale_t type is as on Solaris 11.4. */
+#undef HAVE_SOLARIS114_LOCALES
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#undef HAVE_STDINT_H
+
+/* Define if <stdint.h> exists, doesn't clash with <sys/types.h>, and declares
+   uintmax_t. */
+#undef HAVE_STDINT_H_WITH_UINTMAX
+
+/* Define to 1 if you have the <stdio_ext.h> header file. */
+#undef HAVE_STDIO_EXT_H
+
+/* Define to 1 if you have the <stdio.h> header file. */
+#undef HAVE_STDIO_H
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#undef HAVE_STDLIB_H
+
+/* Define to 1 if you have the `stpcpy' function. */
+#undef HAVE_STPCPY
+
+/* Define to 1 if you have the `strerror_r' function. */
+#define HAVE_STRERROR_R 1
+#include <string.h>
+static _inline int strerror_r(int iErr, char *pszDst, size_t cbDst)
+{
+    return strerror_s(pszDst, cbDst, iErr);
+}
+
+/* Define to 1 if you have the <strings.h> header file. */
+#undef HAVE_STRINGS_H
+
+/* Define to 1 if you have the <string.h> header file. */
+#undef HAVE_STRING_H
+
+/* Define to 1 if you have the `strnlen' function. */
+#undef HAVE_STRNLEN
+
+/* Define to 1 if you have the `strtoimax' function. */
+#undef HAVE_STRTOIMAX
+
+/* Define to 1 if you have the `strtoll' function. */
+#undef HAVE_STRTOLL
+
+/* Define to 1 if you have the `strtoull' function. */
+#undef HAVE_STRTOULL
+
+/* Define to 1 if you have the `strtoumax' function. */
+#undef HAVE_STRTOUMAX
+
+/* Define if there is a member named d_type in the struct describing directory
+   headers. */
+#undef HAVE_STRUCT_DIRENT_D_TYPE
+
+/* Define to 1 if `decimal_point' is a member of `struct lconv'. */
+#undef HAVE_STRUCT_LCONV_DECIMAL_POINT
+
+/* Define to 1 if `sa_sigaction' is a member of `struct sigaction'. */
+#undef HAVE_STRUCT_SIGACTION_SA_SIGACTION
+
+/* Define to 1 if the system has the type `struct sockaddr_storage'. */
+#undef HAVE_STRUCT_SOCKADDR_STORAGE
+
+/* Define to 1 if `ss_family' is a member of `struct sockaddr_storage'. */
+#undef HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY
+
+/* Define to 1 if `f_type' is a member of `struct statfs'. */
+#undef HAVE_STRUCT_STATFS_F_TYPE
+
+/* Define to 1 if `st_atimensec' is a member of `struct stat'. */
+#undef HAVE_STRUCT_STAT_ST_ATIMENSEC
+
+/* Define to 1 if `st_atimespec.tv_nsec' is a member of `struct stat'. */
+#undef HAVE_STRUCT_STAT_ST_ATIMESPEC_TV_NSEC
+
+/* Define to 1 if `st_atim.st__tim.tv_nsec' is a member of `struct stat'. */
+#undef HAVE_STRUCT_STAT_ST_ATIM_ST__TIM_TV_NSEC
+
+/* Define to 1 if `st_atim.tv_nsec' is a member of `struct stat'. */
+#undef HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC
+
+/* Define to 1 if `st_birthtimensec' is a member of `struct stat'. */
+#undef HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC
+
+/* Define to 1 if `st_birthtimespec.tv_nsec' is a member of `struct stat'. */
+#undef HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC
+
+/* Define to 1 if `st_birthtim.tv_nsec' is a member of `struct stat'. */
+#undef HAVE_STRUCT_STAT_ST_BIRTHTIM_TV_NSEC
+
+/* Define to 1 if you have the `symlink' function. */
+#undef HAVE_SYMLINK
+
+/* Define to 1 if you have the <sys/bitypes.h> header file. */
+#undef HAVE_SYS_BITYPES_H
+
+/* Define to 1 if you have the <sys/cdefs.h> header file. */
+#undef HAVE_SYS_CDEFS_H
+
+/* Define to 1 if you have the <sys/dir.h> header file, and it defines `DIR'.
+   */
+#undef HAVE_SYS_DIR_H
+
+/* Define to 1 if you have the <sys/inttypes.h> header file. */
+#undef HAVE_SYS_INTTYPES_H
+
+/* Define to 1 if you have the <sys/ioctl.h> header file. */
+#undef HAVE_SYS_IOCTL_H
+
+/* Define to 1 if you have the <sys/mman.h> header file. */
+#undef HAVE_SYS_MMAN_H
+
+/* Define to 1 if you have the <sys/ndir.h> header file, and it defines `DIR'.
+   */
+#undef HAVE_SYS_NDIR_H
+
+/* Define to 1 if you have the <sys/param.h> header file. */
+#undef HAVE_SYS_PARAM_H
+
+/* Define to 1 if you have the <sys/select.h> header file. */
+#undef HAVE_SYS_SELECT_H
+
+/* Define to 1 if you have the <sys/single_threaded.h> header file. */
+#undef HAVE_SYS_SINGLE_THREADED_H
+
+/* Define to 1 if you have the <sys/socket.h> header file. */
+#undef HAVE_SYS_SOCKET_H
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#undef HAVE_SYS_STAT_H
+
+/* Define to 1 if you have the <sys/time.h> header file. */
+#undef HAVE_SYS_TIME_H
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#undef HAVE_SYS_TYPES_H
+
+/* Define to 1 if you have the <sys/uio.h> header file. */
+#undef HAVE_SYS_UIO_H
+
+/* Define to 1 if you have the <sys/vfs.h> header file. */
+#undef HAVE_SYS_VFS_H
+
+/* Define to 1 if you have the <sys/wait.h> header file. */
+#undef HAVE_SYS_WAIT_H
+
+/* Define to 1 if you have the `thrd_create' function. */
+#undef HAVE_THRD_CREATE
+
+/* Define to 1 if you have the <threads.h> header file. */
+#undef HAVE_THREADS_H
+
+/* Define to 1 if you have the `towlower' function. */
+#undef HAVE_TOWLOWER
+
+/* Define to 1 if you have the `tsearch' function. */
+#undef HAVE_TSEARCH
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#undef HAVE_UNISTD_H
+
+/* Define to 1 if you have the `unsetenv' function. */
+#undef HAVE_UNSETENV
+
+/* Define to 1 if the system has the type 'unsigned long long int'. */
+#undef HAVE_UNSIGNED_LONG_LONG_INT
+
+/* Define to 1 if you have the `uselocale' function. */
+#undef HAVE_USELOCALE
+
+/* Define if you have a global __progname variable */
+#undef HAVE_VAR___PROGNAME
+
+/* Define to 1 if you have the `vasnprintf' function. */
+#undef HAVE_VASNPRINTF
+
+/* Define to 1 or 0, depending whether the compiler supports simple visibility
+   declarations. */
+#undef HAVE_VISIBILITY
+
+/* Define to 1 if you have the <wchar.h> header file. */
+#undef HAVE_WCHAR_H
+
+/* Define if you have the 'wchar_t' type. */
+#undef HAVE_WCHAR_T
+
+/* Define to 1 if you have the `wcrtomb' function. */
+#undef HAVE_WCRTOMB
+
+/* Define to 1 if you have the `wcslen' function. */
+#undef HAVE_WCSLEN
+
+/* Define to 1 if you have the `wcsnlen' function. */
+#undef HAVE_WCSNLEN
+
+/* Define to 1 if you have the `wctob' function. */
+#undef HAVE_WCTOB
+
+/* Define to 1 if you have the <wctype.h> header file. */
+#undef HAVE_WCTYPE_H
+
+/* Define to 1 if you have the `wcwidth' function. */
+#undef HAVE_WCWIDTH
+
+/* Define to 1 if the compiler and linker support weak declarations of
+   symbols. */
+#undef HAVE_WEAK_SYMBOLS
+
+/* Define to 1 if you have the <winsock2.h> header file. */
+#undef HAVE_WINSOCK2_H
+
+/* Define if you have the 'wint_t' type. */
+#undef HAVE_WINT_T
+
+/* Define to 1 if you have the `wmempcpy' function. */
+#undef HAVE_WMEMPCPY
+
+/* Define to 1 if fstatat (..., 0) works. For example, it does not work in AIX
+   7.1. */
+#undef HAVE_WORKING_FSTATAT_ZERO_FLAG
+
+/* Define to 1 if O_NOATIME works. */
+#undef HAVE_WORKING_O_NOATIME
+
+/* Define to 1 if O_NOFOLLOW works. */
+#undef HAVE_WORKING_O_NOFOLLOW
+
+/* Define if you have the sigaltstack() function and it works. */
+#undef HAVE_WORKING_SIGALTSTACK
+
+/* Define if the uselocale function exists and may safely be called. */
+#undef HAVE_WORKING_USELOCALE
+
+/* Define to 1 if you have the <ws2tcpip.h> header file. */
+#undef HAVE_WS2TCPIP_H
+
+/* Define to 1 if you have the <xlocale.h> header file. */
+#undef HAVE_XLOCALE_H
+
+/* Define to 1 if the system has the type `_Bool'. */
+#undef HAVE__BOOL
+
+/* Define to 1 if you have the `_chsize' function. */
+#undef HAVE__CHSIZE
+
+/* Define to 1 if you have the `_set_invalid_parameter_handler' function. */
+#undef HAVE__SET_INVALID_PARAMETER_HANDLER
+
+/* Define to 1 if the compiler supports __builtin_expect,
+   and to 2 if <builtins.h> does.  */
+#undef HAVE___BUILTIN_EXPECT
+#ifndef HAVE___BUILTIN_EXPECT
+# define __builtin_expect(e, c) (e)
+#elif HAVE___BUILTIN_EXPECT == 2
+# include <builtins.h>
+#endif
+    
+
+/* Define to 1 if the system has the type `__fsword_t'. */
+#undef HAVE___FSWORD_T
+
+/* Define to 1 if the compiler supports the keyword '__inline'. */
+#undef HAVE___INLINE
+
+/* Define to 1 if you have the `__xpg_strerror_r' function. */
+#undef HAVE___XPG_STRERROR_R
+
+/* Define as const if the declaration of iconv() needs const. */
+#undef ICONV_CONST
+
+/* Define to a symbolic name denoting the flavor of iconv_open()
+   implementation. */
+#undef ICONV_FLAVOR
+
+/* Define if localename.c overrides newlocale(), duplocale(), freelocale(). */
+#undef LOCALENAME_ENHANCE_LOCALE_FUNCS
+
+/* Define to 1 if lseek does not detect pipes. */
+#undef LSEEK_PIPE_BROKEN
+
+/* Define to 1 if 'lstat' dereferences a symlink specified with a trailing
+   slash. */
+#undef LSTAT_FOLLOWS_SLASHED_SYMLINK
+
+/* If malloc(0) is != NULL, define this to 1. Otherwise define this to 0. */
+#undef MALLOC_0_IS_NONNULL
+
+/* Define to a substitute value for mmap()'s MAP_ANONYMOUS flag. */
+#undef MAP_ANONYMOUS
+
+/* Define if the mbrtowc function does not return (size_t) -2 for empty input.
+   */
+#undef MBRTOWC_EMPTY_INPUT_BUG
+
+/* Define if the mbrtowc function may signal encoding errors in the C locale.
+   */
+#undef MBRTOWC_IN_C_LOCALE_MAYBE_EILSEQ
+
+/* Define if the mbrtowc function has the NULL pwc argument bug. */
+#undef MBRTOWC_NULL_ARG1_BUG
+
+/* Define if the mbrtowc function has the NULL string argument bug. */
+#undef MBRTOWC_NULL_ARG2_BUG
+
+/* Define if the mbrtowc function does not return 0 for a NUL character. */
+#undef MBRTOWC_NUL_RETVAL_BUG
+
+/* Define if the mbrtowc function returns a wrong return value. */
+#undef MBRTOWC_RETVAL_BUG
+
+/* Define if the mbrtowc function stores a wide character when reporting
+   incomplete input. */
+#undef MBRTOWC_STORES_INCOMPLETE_BUG
+
+/* Use GNU style printf and scanf.  */
+#ifndef __USE_MINGW_ANSI_STDIO
+# undef __USE_MINGW_ANSI_STDIO
+#endif
+
+
+/* Define to 1 on musl libc. */
+#undef MUSL_LIBC
+
+/* Define to 1 if assertions should be disabled. */
+#undef NDEBUG
+
+/* Define to 1 to enable general improvements of setlocale. */
+#undef NEED_SETLOCALE_IMPROVED
+
+/* Define to 1 to enable a multithread-safety fix of setlocale. */
+#undef NEED_SETLOCALE_MTSAFE
+
+/* Define to 1 if nl_langinfo is multithread-safe. */
+#undef NL_LANGINFO_MTSAFE
+
+/* Define to 1 if open() fails to recognize a trailing slash. */
+#undef OPEN_TRAILING_SLASH_BUG
+
+/* Name of package */
+#define PACKAGE "kmk_grep"
+
+/* Define to the address where bug reports for this package should be sent. */
+#define PACKAGE_BUGREPORT "bird-kbuild-spam-ixx@anduin.net"
+
+/* Define to the full name of this package. */
+#define PACKAGE_NAME "kmk_grep"
+
+/* String identifying the packager of this software */
+#undef PACKAGE_PACKAGER
+
+/* Packager info for bug reports (URL/e-mail/...) */
+#undef PACKAGE_PACKAGER_BUG_REPORTS
+
+/* Packager-specific version information */
+#undef PACKAGE_PACKAGER_VERSION
+
+/* Define to the full name and version of this package. */
+#undef PACKAGE_STRING
+
+/* Define to the one symbol short name of this package. */
+#undef PACKAGE_TARNAME
+
+/* Define to the home page for this package. */
+#undef PACKAGE_URL
+
+/* Define to the version of this package. */
+#define PACKAGE_VERSION "3.7"
+
+/* Define to the type that is the result of default argument promotions of
+   type mode_t. */
+#define PROMOTED_MODE_T uintptr_t
+
+/* Define if pthread_create is an inline function. */
+#undef PTHREAD_CREATE_IS_INLINE
+
+/* Define if the pthread_in_use() detection is hard. */
+#undef PTHREAD_IN_USE_DETECTION_HARD
+
+/* Define to 1 if pthread_sigmask(), when it fails, returns -1 and sets errno.
+   */
+#undef PTHREAD_SIGMASK_FAILS_WITH_ERRNO
+
+/* Define to 1 if pthread_sigmask may return 0 and have no effect. */
+#undef PTHREAD_SIGMASK_INEFFECTIVE
+
+/* Define to 1 if pthread_sigmask() unblocks signals incorrectly. */
+#undef PTHREAD_SIGMASK_UNBLOCK_BUG
+
+/* Define to l, ll, u, ul, ull, etc., as suitable for constants of type
+   'ptrdiff_t'. */
+#undef PTRDIFF_T_SUFFIX
+
+/* Define to 1 if gnulib's dirfd() replacement is used. */
+#undef REPLACE_DIRFD
+
+/* Define to 1 if gnulib's fchdir() replacement is used. */
+#define REPLACE_FCHDIR 1
+
+/* Define to 1 if stat needs help when passed a file name with a trailing
+   slash */
+#undef REPLACE_FUNC_STAT_FILE
+
+/* Define if nl_langinfo exists but is overridden by gnulib. */
+#undef REPLACE_NL_LANGINFO
+
+/* Define to 1 if open() should work around the inability to open a directory.
+   */
+#undef REPLACE_OPEN_DIRECTORY
+
+/* Define to 1 if strerror(0) does not return a message implying success. */
+#undef REPLACE_STRERROR_0
+
+/* Define if vasnprintf exists but is overridden by gnulib. */
+#undef REPLACE_VASNPRINTF
+
+/* Define to 1 if setlocale (LC_ALL, NULL) is multithread-safe. */
+#undef SETLOCALE_NULL_ALL_MTSAFE
+
+/* Define to 1 if setlocale (category, NULL) is multithread-safe. */
+#undef SETLOCALE_NULL_ONE_MTSAFE
+
+/* Define if sigaltstack() interprets the stack_t.ss_sp field incorrectly, as
+   the highest address of the alternate stack range rather than as the lowest
+   address. */
+#undef SIGALTSTACK_SS_REVERSED
+
+/* Define to l, ll, u, ul, ull, etc., as suitable for constants of type
+   'sig_atomic_t'. */
+#undef SIG_ATOMIC_T_SUFFIX
+
+/* Define as the maximum value of type 'size_t', if the system doesn't define
+   it. */
+#ifndef SIZE_MAX
+# undef SIZE_MAX
+#endif
+
+/* Define to l, ll, u, ul, ull, etc., as suitable for constants of type
+   'size_t'. */
+#undef SIZE_T_SUFFIX
+
+/* Define on Solaris 11 and its derivates. */
+#undef SOLARIS11
+
+/* Define as the direction of stack growth for your system. STACK_DIRECTION >
+   0 => grows toward higher addresses STACK_DIRECTION < 0 => grows toward
+   lower addresses STACK_DIRECTION = 0 => spaghetti stack. */
+#undef STACK_DIRECTION
+
+/* Define to 1 if the `S_IS*' macros in <sys/stat.h> do not work properly. */
+#undef STAT_MACROS_BROKEN
+
+/* Define to 1 if all of the C90 standard headers exist (not just the ones
+   required in a freestanding environment). This macro is provided for
+   backward compatibility; new code need not use it. */
+#undef STDC_HEADERS
+
+/* Define to 1 if strerror_r returns char *. */
+#undef STRERROR_R_CHAR_P
+
+/* Define to 1 if the type of the st_atim member of a struct stat is struct
+   timespec. */
+#undef TYPEOF_STRUCT_STAT_ST_ATIM_IS_STRUCT_TIMESPEC
+
+/* Define if the combination of the ISO C and POSIX multithreading APIs can be
+   used. */
+#undef USE_ISOC_AND_POSIX_THREADS
+
+/* Define if the ISO C multithreading library can be used. */
+#undef USE_ISOC_THREADS
+
+/* Define if the POSIX multithreading library can be used. */
+#undef USE_POSIX_THREADS
+
+/* Define if references to the POSIX multithreading library are satisfied by
+   libc. */
+#undef USE_POSIX_THREADS_FROM_LIBC
+
+/* Define if references to the POSIX multithreading library should be made
+   weak. */
+#undef USE_POSIX_THREADS_WEAK
+
+/* Enable extensions on AIX 3, Interix.  */
+#ifndef _ALL_SOURCE
+# undef _ALL_SOURCE
+#endif
+/* Enable general extensions on macOS.  */
+#ifndef _DARWIN_C_SOURCE
+# undef _DARWIN_C_SOURCE
+#endif
+/* Enable general extensions on Solaris.  */
+#ifndef __EXTENSIONS__
+# undef __EXTENSIONS__
+#endif
+/* Enable GNU extensions on systems that have them.  */
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE
+#endif
+/* Enable X/Open compliant socket functions that do not require linking
+   with -lxnet on HP-UX 11.11.  */
+#ifndef _HPUX_ALT_XOPEN_SOCKET_API
+# undef _HPUX_ALT_XOPEN_SOCKET_API
+#endif
+/* Identify the host operating system as Minix.
+   This macro does not affect the system headers' behavior.
+   A future release of Autoconf may stop defining this macro.  */
+#ifndef _MINIX
+# undef _MINIX
+#endif
+/* Enable general extensions on NetBSD.
+   Enable NetBSD compatibility extensions on Minix.  */
+#ifndef _NETBSD_SOURCE
+# undef _NETBSD_SOURCE
+#endif
+/* Enable OpenBSD compatibility extensions on NetBSD.
+   Oddly enough, this does nothing on OpenBSD.  */
+#ifndef _OPENBSD_SOURCE
+# undef _OPENBSD_SOURCE
+#endif
+/* Define to 1 if needed for POSIX-compatible behavior.  */
+#ifndef _POSIX_SOURCE
+# undef _POSIX_SOURCE
+#endif
+/* Define to 2 if needed for POSIX-compatible behavior.  */
+#ifndef _POSIX_1_SOURCE
+# undef _POSIX_1_SOURCE
+#endif
+/* Enable POSIX-compatible threading on Solaris.  */
+#ifndef _POSIX_PTHREAD_SEMANTICS
+# undef _POSIX_PTHREAD_SEMANTICS
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-5:2014.  */
+#ifndef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+# undef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-1:2014.  */
+#ifndef __STDC_WANT_IEC_60559_BFP_EXT__
+# undef __STDC_WANT_IEC_60559_BFP_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-2:2015.  */
+#ifndef __STDC_WANT_IEC_60559_DFP_EXT__
+# undef __STDC_WANT_IEC_60559_DFP_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-4:2015.  */
+#ifndef __STDC_WANT_IEC_60559_FUNCS_EXT__
+# undef __STDC_WANT_IEC_60559_FUNCS_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-3:2015.  */
+#ifndef __STDC_WANT_IEC_60559_TYPES_EXT__
+# undef __STDC_WANT_IEC_60559_TYPES_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TR 24731-2:2010.  */
+#ifndef __STDC_WANT_LIB_EXT2__
+# undef __STDC_WANT_LIB_EXT2__
+#endif
+/* Enable extensions specified by ISO/IEC 24747:2009.  */
+#ifndef __STDC_WANT_MATH_SPEC_FUNCS__
+# undef __STDC_WANT_MATH_SPEC_FUNCS__
+#endif
+/* Enable extensions on HP NonStop.  */
+#ifndef _TANDEM_SOURCE
+# undef _TANDEM_SOURCE
+#endif
+/* Enable X/Open extensions.  Define to 500 only if necessary
+   to make mbstate_t available.  */
+#ifndef _XOPEN_SOURCE
+# undef _XOPEN_SOURCE
+#endif
+
+
+/* An alias of GNULIB_STDIO_SINGLE_THREAD. */
+#undef USE_UNLOCKED_IO
+
+/* Define if the native Windows multithreading API can be used. */
+#undef USE_WINDOWS_THREADS
+
+/* Version number of package */
+#define VERSION PACKAGE_VERSION
+
+/* Define to 1 if unsetenv returns void instead of int. */
+#undef VOID_UNSETENV
+
+/* Define to l, ll, u, ul, ull, etc., as suitable for constants of type
+   'wchar_t'. */
+#undef WCHAR_T_SUFFIX
+
+/* Define if the wcrtomb function does not work in the C locale. */
+#undef WCRTOMB_C_LOCALE_BUG
+
+/* Define if the wcrtomb function has an incorrect return value. */
+#undef WCRTOMB_RETVAL_BUG
+
+/* Define if WSAStartup is needed. */
+#undef WINDOWS_SOCKETS
+
+/* Define to l, ll, u, ul, ull, etc., as suitable for constants of type
+   'wint_t'. */
+#undef WINT_T_SUFFIX
+
+/* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most
+   significant byte first (like Motorola and SPARC, unlike Intel). */
+#if defined AC_APPLE_UNIVERSAL_BUILD
+# if defined __BIG_ENDIAN__
+#  define WORDS_BIGENDIAN 1
+# endif
+#else
+# ifndef WORDS_BIGENDIAN
+#  undef WORDS_BIGENDIAN
+# endif
+#endif
+
+/* Number of bits in a file offset, on hosts where this is settable. */
+#undef _FILE_OFFSET_BITS
+
+/* True if the compiler says it groks GNU C version MAJOR.MINOR.  */
+#if defined __GNUC__ && defined __GNUC_MINOR__
+# define _GL_GNUC_PREREQ(major, minor) \
+    ((major) < __GNUC__ + ((minor) <= __GNUC_MINOR__))
+#else
+# define _GL_GNUC_PREREQ(major, minor) 0
+#endif
+
+
+/* Define to enable the declarations of ISO C 11 types and functions. */
+#undef _ISOC11_SOURCE
+
+/* Define for large files, on AIX-style hosts. */
+#undef _LARGE_FILES
+
+/* Define to 1 on Solaris. */
+#undef _LCONV_C99
+
+/* The _Noreturn keyword of C11.  */
+#ifndef _Noreturn
+# if (defined __cplusplus \
+      && ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \
+          || (defined _MSC_VER && 1900 <= _MSC_VER)) \
+      && 0)
+    /* [[noreturn]] is not practically usable, because with it the syntax
+         extern _Noreturn void func (...);
+       would not be valid; such a declaration would only be valid with 'extern'
+       and '_Noreturn' swapped, or without the 'extern' keyword.  However, some
+       AIX system header files and several gnulib header files use precisely
+       this syntax with 'extern'.  */
+#  define _Noreturn [[noreturn]]
+# elif ((!defined __cplusplus || defined __clang__) \
+        && (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \
+            || (!defined __STRICT_ANSI__ \
+                && (_GL_GNUC_PREREQ (4, 7) \
+                    || (defined __apple_build_version__ \
+                        ? 6000000 <= __apple_build_version__ \
+                        : 3 < __clang_major__ + (5 <= __clang_minor__))))))
+   /* _Noreturn works as-is.  */
+# elif _GL_GNUC_PREREQ (2, 8) || defined __clang__ || 0x5110 <= __SUNPRO_C
+#  define _Noreturn __attribute__ ((__noreturn__))
+# elif 1200 <= (defined _MSC_VER ? _MSC_VER : 0)
+#  define _Noreturn __declspec (noreturn)
+# else
+#  define _Noreturn
+# endif
+#endif
+
+
+/* Define to 1 in order to get the POSIX compatible declarations of socket
+   functions. */
+#undef _POSIX_PII_SOCKET
+
+/* Define if you want <regex.h> to include <limits.h>, so that it consistently
+   overrides <limits.h>'s RE_DUP_MAX. */
+#undef _REGEX_INCLUDE_LIMITS_H
+
+/* Define if you want regoff_t to be at least as wide POSIX requires. */
+#undef _REGEX_LARGE_OFFSETS
+
+/* Number of bits in a timestamp, on hosts where this is settable. */
+#undef _TIME_BITS
+
+/* For standard stat data types on VMS. */
+#undef _USE_STD_STAT
+
+/* Define to rpl_ if the getopt replacement functions and variables should be
+   used. */
+#undef __GETOPT_PREFIX
+
+/* For 64-bit time_t on 32-bit mingw. */
+#undef __MINGW_USE_VC2005_COMPAT
+
+/* Define to 1 if the system <stdint.h> predates C++11. */
+#undef __STDC_CONSTANT_MACROS
+
+/* Define to 1 if the system <stdint.h> predates C++11. */
+#undef __STDC_LIMIT_MACROS
+
+/* The _GL_ASYNC_SAFE marker should be attached to functions that are
+   signal handlers (for signals other than SIGABRT, SIGPIPE) or can be
+   invoked from such signal handlers.  Such functions have some restrictions:
+     * All functions that it calls should be marked _GL_ASYNC_SAFE as well,
+       or should be listed as async-signal-safe in POSIX
+       <https://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html#tag_15_04>
+       section 2.4.3.  Note that malloc(), sprintf(), and fwrite(), in
+       particular, are NOT async-signal-safe.
+     * All memory locations (variables and struct fields) that these functions
+       access must be marked 'volatile'.  This holds for both read and write
+       accesses.  Otherwise the compiler might optimize away stores to and
+       reads from such locations that occur in the program, depending on its
+       data flow analysis.  For example, when the program contains a loop
+       that is intended to inspect a variable set from within a signal handler
+           while (!signal_occurred)
+             ;
+       the compiler is allowed to transform this into an endless loop if the
+       variable 'signal_occurred' is not declared 'volatile'.
+   Additionally, recall that:
+     * A signal handler should not modify errno (except if it is a handler
+       for a fatal signal and ends by raising the same signal again, thus
+       provoking the termination of the process).  If it invokes a function
+       that may clobber errno, it needs to save and restore the value of
+       errno.  */
+#define _GL_ASYNC_SAFE
+
+
+/* Attributes.  */
+#if (defined __has_attribute \
+     && (!defined __clang_minor__ \
+         || 3 < __clang_major__ + (5 <= __clang_minor__)))
+# define _GL_HAS_ATTRIBUTE(attr) __has_attribute (__##attr##__)
+#else
+# define _GL_HAS_ATTRIBUTE(attr) _GL_ATTR_##attr
+# define _GL_ATTR_alloc_size _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_always_inline _GL_GNUC_PREREQ (3, 2)
+# define _GL_ATTR_artificial _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_cold _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_const _GL_GNUC_PREREQ (2, 95)
+# define _GL_ATTR_deprecated _GL_GNUC_PREREQ (3, 1)
+# define _GL_ATTR_diagnose_if 0
+# define _GL_ATTR_error _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_externally_visible _GL_GNUC_PREREQ (4, 1)
+# define _GL_ATTR_fallthrough _GL_GNUC_PREREQ (7, 0)
+# define _GL_ATTR_format _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_leaf _GL_GNUC_PREREQ (4, 6)
+# define _GL_ATTR_malloc _GL_GNUC_PREREQ (3, 0)
+# ifdef _ICC
+#  define _GL_ATTR_may_alias 0
+# else
+#  define _GL_ATTR_may_alias _GL_GNUC_PREREQ (3, 3)
+# endif
+# define _GL_ATTR_noinline _GL_GNUC_PREREQ (3, 1)
+# define _GL_ATTR_nonnull _GL_GNUC_PREREQ (3, 3)
+# define _GL_ATTR_nonstring _GL_GNUC_PREREQ (8, 0)
+# define _GL_ATTR_nothrow _GL_GNUC_PREREQ (3, 3)
+# define _GL_ATTR_packed _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_pure _GL_GNUC_PREREQ (2, 96)
+# define _GL_ATTR_returns_nonnull _GL_GNUC_PREREQ (4, 9)
+# define _GL_ATTR_sentinel _GL_GNUC_PREREQ (4, 0)
+# define _GL_ATTR_unused _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_warn_unused_result _GL_GNUC_PREREQ (3, 4)
+#endif
+
+#ifdef __has_c_attribute
+# define _GL_HAS_C_ATTRIBUTE(attr) __has_c_attribute (__##attr##__)
+#else
+# define _GL_HAS_C_ATTRIBUTE(attr) 0
+#endif
+
+
+#if _GL_HAS_ATTRIBUTE (alloc_size)
+# define _GL_ATTRIBUTE_ALLOC_SIZE(args) __attribute__ ((__alloc_size__ args))
+#else
+# define _GL_ATTRIBUTE_ALLOC_SIZE(args)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (always_inline)
+# define _GL_ATTRIBUTE_ALWAYS_INLINE __attribute__ ((__always_inline__))
+#else
+# define _GL_ATTRIBUTE_ALWAYS_INLINE
+#endif
+
+#if _GL_HAS_ATTRIBUTE (artificial)
+# define _GL_ATTRIBUTE_ARTIFICIAL __attribute__ ((__artificial__))
+#else
+# define _GL_ATTRIBUTE_ARTIFICIAL
+#endif
+
+/* Avoid __attribute__ ((cold)) on MinGW; see thread starting at
+   <https://lists.gnu.org/r/emacs-devel/2019-04/msg01152.html>.
+   Also, Oracle Studio 12.6 requires 'cold' not '__cold__'.  */
+#if _GL_HAS_ATTRIBUTE (cold) && !defined __MINGW32__
+# ifndef __SUNPRO_C
+#  define _GL_ATTRIBUTE_COLD __attribute__ ((__cold__))
+# else
+#  define _GL_ATTRIBUTE_COLD __attribute__ ((cold))
+# endif
+#else
+# define _GL_ATTRIBUTE_COLD
+#endif
+
+#if _GL_HAS_ATTRIBUTE (const)
+# define _GL_ATTRIBUTE_CONST __attribute__ ((__const__))
+#else
+# define _GL_ATTRIBUTE_CONST
+#endif
+
+/* _GL_ATTRIBUTE_DEALLOC (F, I) is for functions returning pointers
+   that can be freed by passing them as the Ith argument to the
+   function F.  _GL_ATTRIBUTE_DEALLOC_FREE is for functions that
+   return pointers that can be freed via 'free'; it can be used
+   only after including stdlib.h.  These macros cannot be used on
+   inline functions.  */
+#if _GL_GNUC_PREREQ (11, 0)
+# define _GL_ATTRIBUTE_DEALLOC(f, i) __attribute__ ((__malloc__ (f, i)))
+#else
+# define _GL_ATTRIBUTE_DEALLOC(f, i)
+#endif
+#define _GL_ATTRIBUTE_DEALLOC_FREE _GL_ATTRIBUTE_DEALLOC (free, 1)
+
+#if _GL_HAS_C_ATTRIBUTE (deprecated)
+# define _GL_ATTRIBUTE_DEPRECATED [[__deprecated__]]
+#elif _GL_HAS_ATTRIBUTE (deprecated)
+# define _GL_ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__))
+#else
+# define _GL_ATTRIBUTE_DEPRECATED
+#endif
+
+#if _GL_HAS_ATTRIBUTE (error)
+# define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__error__ (msg)))
+# define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__warning__ (msg)))
+#elif _GL_HAS_ATTRIBUTE (diagnose_if)
+# define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__diagnose_if__ (1, msg, "error")))
+# define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__diagnose_if__ (1, msg, "warning")))
+#else
+# define _GL_ATTRIBUTE_ERROR(msg)
+# define _GL_ATTRIBUTE_WARNING(msg)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (externally_visible)
+# define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((externally_visible))
+#else
+# define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE
+#endif
+
+/* FALLTHROUGH is special, because it always expands to something.  */
+#if _GL_HAS_C_ATTRIBUTE (fallthrough)
+# define _GL_ATTRIBUTE_FALLTHROUGH [[__fallthrough__]]
+#elif _GL_HAS_ATTRIBUTE (fallthrough)
+# define _GL_ATTRIBUTE_FALLTHROUGH __attribute__ ((__fallthrough__))
+#else
+# define _GL_ATTRIBUTE_FALLTHROUGH ((void) 0)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (format)
+# define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
+#else
+# define _GL_ATTRIBUTE_FORMAT(spec)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (leaf)
+# define _GL_ATTRIBUTE_LEAF __attribute__ ((__leaf__))
+#else
+# define _GL_ATTRIBUTE_LEAF
+#endif
+
+#if _GL_HAS_ATTRIBUTE (malloc)
+# define _GL_ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
+#else
+# define _GL_ATTRIBUTE_MALLOC
+#endif
+
+/* Oracle Studio 12.6 mishandles may_alias despite __has_attribute OK.  */
+#if _GL_HAS_ATTRIBUTE (may_alias) && !defined __SUNPRO_C
+# define _GL_ATTRIBUTE_MAY_ALIAS __attribute__ ((__may_alias__))
+#else
+# define _GL_ATTRIBUTE_MAY_ALIAS
+#endif
+
+#if _GL_HAS_C_ATTRIBUTE (maybe_unused)
+# define _GL_ATTRIBUTE_MAYBE_UNUSED [[__maybe_unused__]]
+#else
+# define _GL_ATTRIBUTE_MAYBE_UNUSED _GL_ATTRIBUTE_UNUSED
+#endif
+/* Earlier spellings of this macro.  */
+#define _UNUSED_PARAMETER_ _GL_ATTRIBUTE_MAYBE_UNUSED
+
+#if _GL_HAS_C_ATTRIBUTE (nodiscard)
+# define _GL_ATTRIBUTE_NODISCARD [[__nodiscard__]]
+#elif _GL_HAS_ATTRIBUTE (warn_unused_result)
+# define _GL_ATTRIBUTE_NODISCARD __attribute__ ((__warn_unused_result__))
+#else
+# define _GL_ATTRIBUTE_NODISCARD
+#endif
+
+#if _GL_HAS_ATTRIBUTE (noinline)
+# define _GL_ATTRIBUTE_NOINLINE __attribute__ ((__noinline__))
+#else
+# define _GL_ATTRIBUTE_NOINLINE
+#endif
+
+#if _GL_HAS_ATTRIBUTE (nonnull)
+# define _GL_ATTRIBUTE_NONNULL(args) __attribute__ ((__nonnull__ args))
+#else
+# define _GL_ATTRIBUTE_NONNULL(args)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (nonstring)
+# define _GL_ATTRIBUTE_NONSTRING __attribute__ ((__nonstring__))
+#else
+# define _GL_ATTRIBUTE_NONSTRING
+#endif
+
+/* There is no _GL_ATTRIBUTE_NORETURN; use _Noreturn instead.  */
+
+#if _GL_HAS_ATTRIBUTE (nothrow) && !defined __cplusplus
+# define _GL_ATTRIBUTE_NOTHROW __attribute__ ((__nothrow__))
+#else
+# define _GL_ATTRIBUTE_NOTHROW
+#endif
+
+#if _GL_HAS_ATTRIBUTE (packed)
+# define _GL_ATTRIBUTE_PACKED __attribute__ ((__packed__))
+#else
+# define _GL_ATTRIBUTE_PACKED
+#endif
+
+#if _GL_HAS_ATTRIBUTE (pure)
+# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+#else
+# define _GL_ATTRIBUTE_PURE
+#endif
+
+#if _GL_HAS_ATTRIBUTE (returns_nonnull)
+# define _GL_ATTRIBUTE_RETURNS_NONNULL __attribute__ ((__returns_nonnull__))
+#else
+# define _GL_ATTRIBUTE_RETURNS_NONNULL
+#endif
+
+#if _GL_HAS_ATTRIBUTE (sentinel)
+# define _GL_ATTRIBUTE_SENTINEL(pos) __attribute__ ((__sentinel__ pos))
+#else
+# define _GL_ATTRIBUTE_SENTINEL(pos)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (unused)
+# define _GL_ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+#else
+# define _GL_ATTRIBUTE_UNUSED
+#endif
+/* Earlier spellings of this macro.  */
+#define _GL_UNUSED _GL_ATTRIBUTE_UNUSED
+
+
+/* To support C++ as well as C, use _GL_UNUSED_LABEL with trailing ';'.  */
+#if !defined __cplusplus || _GL_GNUC_PREREQ (4, 5)
+# define _GL_UNUSED_LABEL _GL_ATTRIBUTE_UNUSED
+#else
+# define _GL_UNUSED_LABEL
+#endif
+
+
+/* Define to empty if `const' does not conform to ANSI C. */
+#undef const
+
+/* Please see the Gnulib manual for how to use these macros.
+
+   Suppress extern inline with HP-UX cc, as it appears to be broken; see
+   <https://lists.gnu.org/r/bug-texinfo/2013-02/msg00030.html>.
+
+   Suppress extern inline with Sun C in standards-conformance mode, as it
+   mishandles inline functions that call each other.  E.g., for 'inline void f
+   (void) { } inline void g (void) { f (); }', c99 incorrectly complains
+   'reference to static identifier "f" in extern inline function'.
+   This bug was observed with Sun C 5.12 SunOS_i386 2011/11/16.
+
+   Suppress extern inline (with or without __attribute__ ((__gnu_inline__)))
+   on configurations that mistakenly use 'static inline' to implement
+   functions or macros in standard C headers like <ctype.h>.  For example,
+   if isdigit is mistakenly implemented via a static inline function,
+   a program containing an extern inline function that calls isdigit
+   may not work since the C standard prohibits extern inline functions
+   from calling static functions (ISO C 99 section 6.7.4.(3).
+   This bug is known to occur on:
+
+     OS X 10.8 and earlier; see:
+     https://lists.gnu.org/r/bug-gnulib/2012-12/msg00023.html
+
+     DragonFly; see
+     http://muscles.dragonflybsd.org/bulk/clang-master-potential/20141111_102002/logs/ah-tty-0.3.12.log
+
+     FreeBSD; see:
+     https://lists.gnu.org/r/bug-gnulib/2014-07/msg00104.html
+
+   OS X 10.9 has a macro __header_inline indicating the bug is fixed for C and
+   for clang but remains for g++; see <https://trac.macports.org/ticket/41033>.
+   Assume DragonFly and FreeBSD will be similar.
+
+   GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
+   inline semantics, unless -fgnu89-inline is used.  It defines a macro
+   __GNUC_STDC_INLINE__ to indicate this situation or a macro
+   __GNUC_GNU_INLINE__ to indicate the opposite situation.
+   GCC 4.2 with -std=c99 or -std=gnu99 implements the GNU C inline
+   semantics but warns, unless -fgnu89-inline is used:
+     warning: C99 inline functions are not supported; using GNU89
+     warning: to disable this warning use -fgnu89-inline or the gnu_inline function attribute
+   It defines a macro __GNUC_GNU_INLINE__ to indicate this situation.
+ */
+#if (((defined __APPLE__ && defined __MACH__) \
+      || defined __DragonFly__ || defined __FreeBSD__) \
+     && (defined __header_inline \
+         ? (defined __cplusplus && defined __GNUC_STDC_INLINE__ \
+            && ! defined __clang__) \
+         : ((! defined _DONT_USE_CTYPE_INLINE_ \
+             && (defined __GNUC__ || defined __cplusplus)) \
+            || (defined _FORTIFY_SOURCE && 0 < _FORTIFY_SOURCE \
+                && defined __GNUC__ && ! defined __cplusplus))))
+# define _GL_EXTERN_INLINE_STDHEADER_BUG
+#endif
+#if ((__GNUC__ \
+      ? defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__ \
+      : (199901L <= __STDC_VERSION__ \
+         && !defined __HP_cc \
+         && !defined __PGI \
+         && !(defined __SUNPRO_C && __STDC__))) \
+     && !defined _GL_EXTERN_INLINE_STDHEADER_BUG)
+# define _GL_INLINE inline
+# define _GL_EXTERN_INLINE extern inline
+# define _GL_EXTERN_INLINE_IN_USE
+#elif (2 < __GNUC__ + (7 <= __GNUC_MINOR__) && !defined __STRICT_ANSI__ \
+       && !defined _GL_EXTERN_INLINE_STDHEADER_BUG)
+# if defined __GNUC_GNU_INLINE__ && __GNUC_GNU_INLINE__
+   /* __gnu_inline__ suppresses a GCC 4.2 diagnostic.  */
+#  define _GL_INLINE extern inline __attribute__ ((__gnu_inline__))
+# else
+#  define _GL_INLINE extern inline
+# endif
+# define _GL_EXTERN_INLINE extern
+# define _GL_EXTERN_INLINE_IN_USE
+#else
+# define _GL_INLINE static _GL_UNUSED
+# define _GL_EXTERN_INLINE static _GL_UNUSED
+#endif
+
+/* In GCC 4.6 (inclusive) to 5.1 (exclusive),
+   suppress bogus "no previous prototype for 'FOO'"
+   and "no previous declaration for 'FOO'" diagnostics,
+   when FOO is an inline function in the header; see
+   <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113> and
+   <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63877>.  */
+#if __GNUC__ == 4 && 6 <= __GNUC_MINOR__
+# if defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__
+#  define _GL_INLINE_HEADER_CONST_PRAGMA
+# else
+#  define _GL_INLINE_HEADER_CONST_PRAGMA \
+     _Pragma ("GCC diagnostic ignored \"-Wsuggest-attribute=const\"")
+# endif
+# define _GL_INLINE_HEADER_BEGIN \
+    _Pragma ("GCC diagnostic push") \
+    _Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"") \
+    _Pragma ("GCC diagnostic ignored \"-Wmissing-declarations\"") \
+    _GL_INLINE_HEADER_CONST_PRAGMA
+# define _GL_INLINE_HEADER_END \
+    _Pragma ("GCC diagnostic pop")
+#else
+# define _GL_INLINE_HEADER_BEGIN
+# define _GL_INLINE_HEADER_END
+#endif
+
+/* Define to the overridden function name */
+#undef fts_children
+
+/* Define to the overridden function name */
+#undef fts_close
+
+/* Define to the overridden function name */
+#undef fts_cross_check
+
+/* Define to the overridden function name */
+#undef fts_open
+
+/* Define to the overridden function name */
+#undef fts_read
+
+/* Define to the overridden function name */
+#undef fts_set
+
+/* Define to `int' if <sys/types.h> doesn't define. */
+#undef gid_t
+
+/* A replacement for va_copy, if needed.  */
+#define gl_va_copy(a,b) ((a) = (b))
+
+/* Define to `__inline__' or `__inline' if that's what the C compiler
+   calls it, or to nothing if 'inline' is not supported under any name.  */
+#ifndef __cplusplus
+#undef inline
+#endif
+
+/* Define to long or long long if <stdint.h> and <inttypes.h> don't define. */
+#undef intmax_t
+
+/* Work around a bug in Apple GCC 4.0.1 build 5465: In C99 mode, it supports
+   the ISO C 99 semantics of 'extern inline' (unlike the GNU C semantics of
+   earlier versions), but does not display it by setting __GNUC_STDC_INLINE__.
+   __APPLE__ && __MACH__ test for Mac OS X.
+   __APPLE_CC__ tests for the Apple compiler and its version.
+   __STDC_VERSION__ tests for the C99 mode.  */
+#if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined __cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__
+# define __GNUC_STDC_INLINE__ 1
+#endif
+
+/* Define to 1 if the compiler is checking for lint. */
+#undef lint
+
+/* Define to a type if <wchar.h> does not define. */
+#undef mbstate_t
+
+/* _GL_CMP (n1, n2) performs a three-valued comparison on n1 vs. n2, where
+   n1 and n2 are expressions without side effects, that evaluate to real
+   numbers (excluding NaN).
+   It returns
+     1  if n1 > n2
+     0  if n1 == n2
+     -1 if n1 < n2
+   The naïve code   (n1 > n2 ? 1 : n1 < n2 ? -1 : 0)  produces a conditional
+   jump with nearly all GCC versions up to GCC 10.
+   This variant     (n1 < n2 ? -1 : n1 > n2)  produces a conditional with many
+   GCC versions up to GCC 9.
+   The better code  (n1 > n2) - (n1 < n2)  from Hacker's Delight § 2-9
+   avoids conditional jumps in all GCC versions >= 3.4.  */
+#define _GL_CMP(n1, n2) (((n1) > (n2)) - ((n1) < (n2)))
+
+
+/* Define to `int' if <sys/types.h> does not define. */
+#undef mode_t
+
+/* Define to the type of st_nlink in struct stat, or a supertype. */
+#undef nlink_t
+
+/* Define to `long int' if <sys/types.h> does not define. */
+#undef off_t
+
+/* Define as a signed integer type capable of holding a process identifier. */
+#undef pid_t
+
+/* Define as the type of the result of subtracting two pointers, if the system
+   doesn't define it. */
+#undef ptrdiff_t
+
+/* Define to rpl_re_comp if the replacement should be used. */
+#undef re_comp
+
+/* Define to rpl_re_compile_fastmap if the replacement should be used. */
+#undef re_compile_fastmap
+
+/* Define to rpl_re_compile_pattern if the replacement should be used. */
+#undef re_compile_pattern
+
+/* Define to rpl_re_exec if the replacement should be used. */
+#undef re_exec
+
+/* Define to rpl_re_match if the replacement should be used. */
+#undef re_match
+
+/* Define to rpl_re_match_2 if the replacement should be used. */
+#undef re_match_2
+
+/* Define to rpl_re_search if the replacement should be used. */
+#undef re_search
+
+/* Define to rpl_re_search_2 if the replacement should be used. */
+#undef re_search_2
+
+/* Define to rpl_re_set_registers if the replacement should be used. */
+#undef re_set_registers
+
+/* Define to rpl_re_set_syntax if the replacement should be used. */
+#undef re_set_syntax
+
+/* Define to rpl_re_syntax_options if the replacement should be used. */
+#undef re_syntax_options
+
+/* Define to rpl_regcomp if the replacement should be used. */
+#undef regcomp
+
+/* Define to rpl_regerror if the replacement should be used. */
+#undef regerror
+
+/* Define to rpl_regexec if the replacement should be used. */
+#undef regexec
+
+/* Define to rpl_regfree if the replacement should be used. */
+#undef regfree
+
+/* Define to the equivalent of the C99 'restrict' keyword, or to
+   nothing if this is not supported.  Do not define if restrict is
+   supported only directly.  */
+#define restrict
+/* Work around a bug in older versions of Sun C++, which did not
+   #define __restrict__ or support _Restrict or __restrict__
+   even though the corresponding Sun C compiler ended up with
+   "#define restrict _Restrict" or "#define restrict __restrict__"
+   in the previous line.  This workaround can be removed once
+   we assume Oracle Developer Studio 12.5 (2016) or later.  */
+#if defined __SUNPRO_CC && !defined __RESTRICT && !defined __restrict__
+# define _Restrict
+# define __restrict__
+#endif
+
+/* Define to `unsigned int' if <sys/types.h> does not define. */
+#undef size_t
+
+/* type to use in place of socklen_t if not defined */
+#undef socklen_t
+
+/* Define as a signed type of the same size as size_t. */
+#define ssize_t ptrdiff_t
+
+/* Define to 'struct sigaltstack' if that's the type of the argument to
+   sigaltstack */
+#undef stack_t
+
+/* Define to `int' if <sys/types.h> doesn't define. */
+#undef uid_t
+
+
+  /* This definition is a duplicate of the one in unitypes.h.
+     It is here so that we can cope with an older version of unitypes.h
+     that does not contain this definition and that is pre-installed among
+     the public header files.  */
+  # if defined __restrict \
+       || 2 < __GNUC__ + (95 <= __GNUC_MINOR__) \
+       || __clang_major__ >= 3
+  #  define _UC_RESTRICT __restrict
+  # elif 199901L <= __STDC_VERSION__ || defined restrict
+  #  define _UC_RESTRICT restrict
+  # else
+  #  define _UC_RESTRICT
+  # endif
+  
+
+/* Define as a macro for copying va_list variables. */
+#undef va_copy
+
+typedef unsigned mode_t;
+
+/* Include windows.h here before DATADIR is defined, as it conflicts with objidl.h. */
+#include <windows.h>
+
+/* Hack! */
+#include <arg-nonnull.h>
+
+/* More hacks */
+#define _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD(a, b)
+
+/* S_ISXXX macros: */
+#include <sys/stat.h>
+#include <nt/ntstat.h>
+#ifndef S_ISCHR
+# define S_ISCHR(x) 0
+#endif
+#ifndef S_ISBLK
+# define S_ISBLK(x) 0
+#endif
+#ifndef S_ISSOCK
+# define S_ISSOCK(x) 0
+#endif
+#ifndef S_ISFIFO
+# define S_ISFIFO(x) 0
+#endif
+#ifndef S_TYPEISSHM
+# define S_TYPEISSHM(x) 0
+#endif
+#ifndef S_TYPEISTMO
+# define S_TYPEISTMO(x) 0
+#endif
+
+/* Missing these: */
+#define STDIN_FILENO 0
+#define STDOUT_FILENO 1
+#define STDERR_FILENO 2
+
+/* Missing open flags.*/
+#include <nt/ntopenat.h>
+#ifndef O_NOCTTY
+# define O_NOCTTY 0
+#endif
+#ifndef O_NOFOLLOW
+# define O_NOFOLLOW 0
+#endif
+#ifndef O_NOLINK
+# define O_NOLINK 0
+#endif
+#ifndef O_NOLINKS
+# define O_NOLINKS 0
+#endif
+#ifndef O_NOTRANS
+# define O_NOTRANS 0
+#endif
+#ifndef O_NONBLOCK
+# define O_NONBLOCK 0
+#endif
+#ifndef O_SEARCH
+# define O_SEARCH 0
+#endif
+#ifndef O_CLOEXEC
+# define O_CLOEXEC _O_NOINHERIT
+#endif
+
+/* Some prototypes of gnulib functions put here to avoid needing to mess with
+   stdlib.in.h, string.in.h and wchar.in.h since MSC has no include_next facility. */
+extern void *reallocarray(void *, size_t, size_t);
+extern int mbscasecmp(const char *, const char *);
+extern wchar_t *wmempcpy(wchar_t *, const wchar_t *, size_t);
+extern int wcwidth(wchar_t);
+
+#define strerror gl_strerror
+
+/* Override initialize_main to do wildcard expansion. */
+#define initialize_main w32_initialize_main
+void w32_initialize_main(int *pcArgs, char ***ppapszArgs);
+
+#include "get_codepage.h"
+
+#endif /* !INCLUDED_CONFIG_WIN_H */
+
diff --git a/src/grep/configure b/src/grep/configure
new file mode 100755
index 0000000..d848d49
--- /dev/null
+++ b/src/grep/configure
@@ -0,0 +1,51914 @@
+#! /bin/sh
+# Guess values for system-dependent variables and create Makefiles.
+# Generated by GNU Autoconf 2.71 for GNU grep 3.7.
+#
+# Report bugs to <bug-grep@gnu.org>.
+#
+#
+# Copyright (C) 1992-1996, 1998-2017, 2020-2021 Free Software Foundation,
+# Inc.
+#
+#
+# This configure script is free software; the Free Software Foundation
+# gives unlimited permission to copy, distribute and modify it.
+## -------------------- ##
+## M4sh Initialization. ##
+## -------------------- ##
+
+# Be more Bourne compatible
+DUALCASE=1; export DUALCASE # for MKS sh
+as_nop=:
+if test ${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
+then :
+  emulate sh
+  NULLCMD=:
+  # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else $as_nop
+  case `(set -o) 2>/dev/null` in #(
+  *posix*) :
+    set -o posix ;; #(
+  *) :
+     ;;
+esac
+fi
+
+
+
+# Reset variables that may have inherited troublesome values from
+# the environment.
+
+# IFS needs to be set, to space, tab, and newline, in precisely that order.
+# (If _AS_PATH_WALK were called with IFS unset, it would have the
+# side effect of setting IFS to empty, thus disabling word splitting.)
+# Quoting is to prevent editors from complaining about space-tab.
+as_nl='
+'
+export as_nl
+IFS=" ""	$as_nl"
+
+PS1='$ '
+PS2='> '
+PS4='+ '
+
+# Ensure predictable behavior from utilities with locale-dependent output.
+LC_ALL=C
+export LC_ALL
+LANGUAGE=C
+export LANGUAGE
+
+# We cannot yet rely on "unset" to work, but we need these variables
+# to be unset--not just set to an empty or harmless value--now, to
+# avoid bugs in old shells (e.g. pre-3.0 UWIN ksh).  This construct
+# also avoids known problems related to "unset" and subshell syntax
+# in other old shells (e.g. bash 2.01 and pdksh 5.2.14).
+for as_var in BASH_ENV ENV MAIL MAILPATH CDPATH
+do eval test \${$as_var+y} \
+  && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
+done
+
+# Ensure that fds 0, 1, and 2 are open.
+if (exec 3>&0) 2>/dev/null; then :; else exec 0</dev/null; fi
+if (exec 3>&1) 2>/dev/null; then :; else exec 1>/dev/null; fi
+if (exec 3>&2)            ; then :; else exec 2>/dev/null; fi
+
+# The user is always right.
+if ${PATH_SEPARATOR+false} :; then
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && {
+    (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 ||
+      PATH_SEPARATOR=';'
+  }
+fi
+
+
+# Find who we are.  Look in the path if we contain no directory separator.
+as_myself=
+case $0 in #((
+  *[\\/]* ) as_myself=$0 ;;
+  *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    test -r "$as_dir$0" && as_myself=$as_dir$0 && break
+  done
+IFS=$as_save_IFS
+
+     ;;
+esac
+# We did not find ourselves, most probably we were run as `sh COMMAND'
+# in which case we are not to be found in the path.
+if test "x$as_myself" = x; then
+  as_myself=$0
+fi
+if test ! -f "$as_myself"; then
+  printf "%s\n" "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
+  exit 1
+fi
+
+
+# Use a proper internal environment variable to ensure we don't fall
+  # into an infinite loop, continuously re-executing ourselves.
+  if test x"${_as_can_reexec}" != xno && test "x$CONFIG_SHELL" != x; then
+    _as_can_reexec=no; export _as_can_reexec;
+    # We cannot yet assume a decent shell, so we have to provide a
+# neutralization value for shells without unset; and this also
+# works around shells that cannot unset nonexistent variables.
+# Preserve -v and -x to the replacement shell.
+BASH_ENV=/dev/null
+ENV=/dev/null
+(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
+case $- in # ((((
+  *v*x* | *x*v* ) as_opts=-vx ;;
+  *v* ) as_opts=-v ;;
+  *x* ) as_opts=-x ;;
+  * ) as_opts= ;;
+esac
+exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
+# Admittedly, this is quite paranoid, since all the known shells bail
+# out after a failed `exec'.
+printf "%s\n" "$0: could not re-execute with $CONFIG_SHELL" >&2
+exit 255
+  fi
+  # We don't want this to propagate to other subprocesses.
+          { _as_can_reexec=; unset _as_can_reexec;}
+if test "x$CONFIG_SHELL" = x; then
+  as_bourne_compatible="as_nop=:
+if test \${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
+then :
+  emulate sh
+  NULLCMD=:
+  # Pre-4.2 versions of Zsh do word splitting on \${1+\"\$@\"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '\${1+\"\$@\"}'='\"\$@\"'
+  setopt NO_GLOB_SUBST
+else \$as_nop
+  case \`(set -o) 2>/dev/null\` in #(
+  *posix*) :
+    set -o posix ;; #(
+  *) :
+     ;;
+esac
+fi
+"
+  as_required="as_fn_return () { (exit \$1); }
+as_fn_success () { as_fn_return 0; }
+as_fn_failure () { as_fn_return 1; }
+as_fn_ret_success () { return 0; }
+as_fn_ret_failure () { return 1; }
+
+exitcode=0
+as_fn_success || { exitcode=1; echo as_fn_success failed.; }
+as_fn_failure && { exitcode=1; echo as_fn_failure succeeded.; }
+as_fn_ret_success || { exitcode=1; echo as_fn_ret_success failed.; }
+as_fn_ret_failure && { exitcode=1; echo as_fn_ret_failure succeeded.; }
+if ( set x; as_fn_ret_success y && test x = \"\$1\" )
+then :
+
+else \$as_nop
+  exitcode=1; echo positional parameters were not saved.
+fi
+test x\$exitcode = x0 || exit 1
+blah=\$(echo \$(echo blah))
+test x\"\$blah\" = xblah || exit 1
+test -x / || exit 1"
+  as_suggested="  as_lineno_1=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_1a=\$LINENO
+  as_lineno_2=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_2a=\$LINENO
+  eval 'test \"x\$as_lineno_1'\$as_run'\" != \"x\$as_lineno_2'\$as_run'\" &&
+  test \"x\`expr \$as_lineno_1'\$as_run' + 1\`\" = \"x\$as_lineno_2'\$as_run'\"' || exit 1
+test \$(( 1 + 1 )) = 2 || exit 1"
+  if (eval "$as_required") 2>/dev/null
+then :
+  as_have_required=yes
+else $as_nop
+  as_have_required=no
+fi
+  if test x$as_have_required = xyes && (eval "$as_suggested") 2>/dev/null
+then :
+
+else $as_nop
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+as_found=false
+for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+  as_found=:
+  case $as_dir in #(
+	 /*)
+	   for as_base in sh bash ksh sh5; do
+	     # Try only shells that exist, to save several forks.
+	     as_shell=$as_dir$as_base
+	     if { test -f "$as_shell" || test -f "$as_shell.exe"; } &&
+		    as_run=a "$as_shell" -c "$as_bourne_compatible""$as_required" 2>/dev/null
+then :
+  CONFIG_SHELL=$as_shell as_have_required=yes
+		   if as_run=a "$as_shell" -c "$as_bourne_compatible""$as_suggested" 2>/dev/null
+then :
+  break 2
+fi
+fi
+	   done;;
+       esac
+  as_found=false
+done
+IFS=$as_save_IFS
+if $as_found
+then :
+
+else $as_nop
+  if { test -f "$SHELL" || test -f "$SHELL.exe"; } &&
+	      as_run=a "$SHELL" -c "$as_bourne_compatible""$as_required" 2>/dev/null
+then :
+  CONFIG_SHELL=$SHELL as_have_required=yes
+fi
+fi
+
+
+      if test "x$CONFIG_SHELL" != x
+then :
+  export CONFIG_SHELL
+             # We cannot yet assume a decent shell, so we have to provide a
+# neutralization value for shells without unset; and this also
+# works around shells that cannot unset nonexistent variables.
+# Preserve -v and -x to the replacement shell.
+BASH_ENV=/dev/null
+ENV=/dev/null
+(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
+case $- in # ((((
+  *v*x* | *x*v* ) as_opts=-vx ;;
+  *v* ) as_opts=-v ;;
+  *x* ) as_opts=-x ;;
+  * ) as_opts= ;;
+esac
+exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
+# Admittedly, this is quite paranoid, since all the known shells bail
+# out after a failed `exec'.
+printf "%s\n" "$0: could not re-execute with $CONFIG_SHELL" >&2
+exit 255
+fi
+
+    if test x$as_have_required = xno
+then :
+  printf "%s\n" "$0: This script requires a shell more modern than all"
+  printf "%s\n" "$0: the shells that I found on your system."
+  if test ${ZSH_VERSION+y} ; then
+    printf "%s\n" "$0: In particular, zsh $ZSH_VERSION has bugs and should"
+    printf "%s\n" "$0: be upgraded to zsh 4.3.4 or later."
+  else
+    printf "%s\n" "$0: Please tell bug-autoconf@gnu.org and bug-grep@gnu.org
+$0: about your system, including any error possibly output
+$0: before this message. Then install a modern shell, or
+$0: manually run the script under such a shell if you do
+$0: have one."
+  fi
+  exit 1
+fi
+fi
+fi
+SHELL=${CONFIG_SHELL-/bin/sh}
+export SHELL
+# Unset more variables known to interfere with behavior of common tools.
+CLICOLOR_FORCE= GREP_OPTIONS=
+unset CLICOLOR_FORCE GREP_OPTIONS
+
+## --------------------- ##
+## M4sh Shell Functions. ##
+## --------------------- ##
+# as_fn_unset VAR
+# ---------------
+# Portably unset VAR.
+as_fn_unset ()
+{
+  { eval $1=; unset $1;}
+}
+as_unset=as_fn_unset
+
+
+# as_fn_set_status STATUS
+# -----------------------
+# Set $? to STATUS, without forking.
+as_fn_set_status ()
+{
+  return $1
+} # as_fn_set_status
+
+# as_fn_exit STATUS
+# -----------------
+# Exit the shell with STATUS, even in a "trap 0" or "set -e" context.
+as_fn_exit ()
+{
+  set +e
+  as_fn_set_status $1
+  exit $1
+} # as_fn_exit
+# as_fn_nop
+# ---------
+# Do nothing but, unlike ":", preserve the value of $?.
+as_fn_nop ()
+{
+  return $?
+}
+as_nop=as_fn_nop
+
+# as_fn_mkdir_p
+# -------------
+# Create "$as_dir" as a directory, including parents if necessary.
+as_fn_mkdir_p ()
+{
+
+  case $as_dir in #(
+  -*) as_dir=./$as_dir;;
+  esac
+  test -d "$as_dir" || eval $as_mkdir_p || {
+    as_dirs=
+    while :; do
+      case $as_dir in #(
+      *\'*) as_qdir=`printf "%s\n" "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
+      *) as_qdir=$as_dir;;
+      esac
+      as_dirs="'$as_qdir' $as_dirs"
+      as_dir=`$as_dirname -- "$as_dir" ||
+$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$as_dir" : 'X\(//\)[^/]' \| \
+	 X"$as_dir" : 'X\(//\)$' \| \
+	 X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X"$as_dir" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+      test -d "$as_dir" && break
+    done
+    test -z "$as_dirs" || eval "mkdir $as_dirs"
+  } || test -d "$as_dir" || as_fn_error $? "cannot create directory $as_dir"
+
+
+} # as_fn_mkdir_p
+
+# as_fn_executable_p FILE
+# -----------------------
+# Test if FILE is an executable regular file.
+as_fn_executable_p ()
+{
+  test -f "$1" && test -x "$1"
+} # as_fn_executable_p
+# as_fn_append VAR VALUE
+# ----------------------
+# Append the text in VALUE to the end of the definition contained in VAR. Take
+# advantage of any shell optimizations that allow amortized linear growth over
+# repeated appends, instead of the typical quadratic growth present in naive
+# implementations.
+if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null
+then :
+  eval 'as_fn_append ()
+  {
+    eval $1+=\$2
+  }'
+else $as_nop
+  as_fn_append ()
+  {
+    eval $1=\$$1\$2
+  }
+fi # as_fn_append
+
+# as_fn_arith ARG...
+# ------------------
+# Perform arithmetic evaluation on the ARGs, and store the result in the
+# global $as_val. Take advantage of shells that can avoid forks. The arguments
+# must be portable across $(()) and expr.
+if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null
+then :
+  eval 'as_fn_arith ()
+  {
+    as_val=$(( $* ))
+  }'
+else $as_nop
+  as_fn_arith ()
+  {
+    as_val=`expr "$@" || test $? -eq 1`
+  }
+fi # as_fn_arith
+
+# as_fn_nop
+# ---------
+# Do nothing but, unlike ":", preserve the value of $?.
+as_fn_nop ()
+{
+  return $?
+}
+as_nop=as_fn_nop
+
+# as_fn_error STATUS ERROR [LINENO LOG_FD]
+# ----------------------------------------
+# Output "`basename $0`: error: ERROR" to stderr. If LINENO and LOG_FD are
+# provided, also output the error to LOG_FD, referencing LINENO. Then exit the
+# script with STATUS, using 1 if that was 0.
+as_fn_error ()
+{
+  as_status=$1; test $as_status -eq 0 && as_status=1
+  if test "$4"; then
+    as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
+  fi
+  printf "%s\n" "$as_me: error: $2" >&2
+  as_fn_exit $as_status
+} # as_fn_error
+
+if expr a : '\(a\)' >/dev/null 2>&1 &&
+   test "X`expr 00001 : '.*\(...\)'`" = X001; then
+  as_expr=expr
+else
+  as_expr=false
+fi
+
+if (basename -- /) >/dev/null 2>&1 && test "X`basename -- / 2>&1`" = "X/"; then
+  as_basename=basename
+else
+  as_basename=false
+fi
+
+if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then
+  as_dirname=dirname
+else
+  as_dirname=false
+fi
+
+as_me=`$as_basename -- "$0" ||
+$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
+	 X"$0" : 'X\(//\)$' \| \
+	 X"$0" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X/"$0" |
+    sed '/^.*\/\([^/][^/]*\)\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+
+# Avoid depending upon Character Ranges.
+as_cr_letters='abcdefghijklmnopqrstuvwxyz'
+as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+as_cr_Letters=$as_cr_letters$as_cr_LETTERS
+as_cr_digits='0123456789'
+as_cr_alnum=$as_cr_Letters$as_cr_digits
+
+
+  as_lineno_1=$LINENO as_lineno_1a=$LINENO
+  as_lineno_2=$LINENO as_lineno_2a=$LINENO
+  eval 'test "x$as_lineno_1'$as_run'" != "x$as_lineno_2'$as_run'" &&
+  test "x`expr $as_lineno_1'$as_run' + 1`" = "x$as_lineno_2'$as_run'"' || {
+  # Blame Lee E. McMahon (1931-1989) for sed's syntax.  :-)
+  sed -n '
+    p
+    /[$]LINENO/=
+  ' <$as_myself |
+    sed '
+      s/[$]LINENO.*/&-/
+      t lineno
+      b
+      :lineno
+      N
+      :loop
+      s/[$]LINENO\([^'$as_cr_alnum'_].*\n\)\(.*\)/\2\1\2/
+      t loop
+      s/-\n.*//
+    ' >$as_me.lineno &&
+  chmod +x "$as_me.lineno" ||
+    { printf "%s\n" "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2; as_fn_exit 1; }
+
+  # If we had to re-execute with $CONFIG_SHELL, we're ensured to have
+  # already done that, so ensure we don't try to do so again and fall
+  # in an infinite loop.  This has already happened in practice.
+  _as_can_reexec=no; export _as_can_reexec
+  # Don't try to exec as it changes $[0], causing all sort of problems
+  # (the dirname of $[0] is not the place where we might find the
+  # original and so on.  Autoconf is especially sensitive to this).
+  . "./$as_me.lineno"
+  # Exit status is that of the last command.
+  exit
+}
+
+
+# Determine whether it's possible to make 'echo' print without a newline.
+# These variables are no longer used directly by Autoconf, but are AC_SUBSTed
+# for compatibility with existing Makefiles.
+ECHO_C= ECHO_N= ECHO_T=
+case `echo -n x` in #(((((
+-n*)
+  case `echo 'xy\c'` in
+  *c*) ECHO_T='	';;	# ECHO_T is single tab character.
+  xy)  ECHO_C='\c';;
+  *)   echo `echo ksh88 bug on AIX 6.1` > /dev/null
+       ECHO_T='	';;
+  esac;;
+*)
+  ECHO_N='-n';;
+esac
+
+# For backward compatibility with old third-party macros, we provide
+# the shell variables $as_echo and $as_echo_n.  New code should use
+# AS_ECHO(["message"]) and AS_ECHO_N(["message"]), respectively.
+as_echo='printf %s\n'
+as_echo_n='printf %s'
+
+
+rm -f conf$$ conf$$.exe conf$$.file
+if test -d conf$$.dir; then
+  rm -f conf$$.dir/conf$$.file
+else
+  rm -f conf$$.dir
+  mkdir conf$$.dir 2>/dev/null
+fi
+if (echo >conf$$.file) 2>/dev/null; then
+  if ln -s conf$$.file conf$$ 2>/dev/null; then
+    as_ln_s='ln -s'
+    # ... but there are two gotchas:
+    # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
+    # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
+    # In both cases, we have to default to `cp -pR'.
+    ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
+      as_ln_s='cp -pR'
+  elif ln conf$$.file conf$$ 2>/dev/null; then
+    as_ln_s=ln
+  else
+    as_ln_s='cp -pR'
+  fi
+else
+  as_ln_s='cp -pR'
+fi
+rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file
+rmdir conf$$.dir 2>/dev/null
+
+if mkdir -p . 2>/dev/null; then
+  as_mkdir_p='mkdir -p "$as_dir"'
+else
+  test -d ./-p && rmdir ./-p
+  as_mkdir_p=false
+fi
+
+as_test_x='test -x'
+as_executable_p=as_fn_executable_p
+
+# Sed expression to map a string onto a valid CPP name.
+as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
+
+# Sed expression to map a string onto a valid variable name.
+as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
+
+
+test -n "$DJDIR" || exec 7<&0 </dev/null
+exec 6>&1
+
+# Name of the host.
+# hostname on some systems (SVR3.2, old GNU/Linux) returns a bogus exit status,
+# so uname gets run too.
+ac_hostname=`(hostname || uname -n) 2>/dev/null | sed 1q`
+
+#
+# Initializations.
+#
+ac_default_prefix=/usr/local
+ac_clean_files=
+ac_config_libobj_dir=.
+LIBOBJS=
+cross_compiling=no
+subdirs=
+MFLAGS=
+MAKEFLAGS=
+
+# Identity of this package.
+PACKAGE_NAME='GNU grep'
+PACKAGE_TARNAME='grep'
+PACKAGE_VERSION='3.7'
+PACKAGE_STRING='GNU grep 3.7'
+PACKAGE_BUGREPORT='bug-grep@gnu.org'
+PACKAGE_URL='https://www.gnu.org/software/grep/'
+
+ac_unique_file="src/grep.c"
+# Factoring default headers for most tests.
+ac_includes_default="\
+#include <stddef.h>
+#ifdef HAVE_STDIO_H
+# include <stdio.h>
+#endif
+#ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+# include <string.h>
+#endif
+#ifdef HAVE_INTTYPES_H
+# include <inttypes.h>
+#endif
+#ifdef HAVE_STDINT_H
+# include <stdint.h>
+#endif
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif"
+
+ac_header_c_list=
+gl_use_threads_default=
+gl_use_winpthreads_default=
+ac_func_c_list=
+gl_fnmatch_required=POSIX
+gl_getopt_required=POSIX
+gt_needs=
+ac_subst_vars='gltests_LTLIBOBJS
+gltests_LIBOBJS
+gl_LTLIBOBJS
+gl_LIBOBJS
+CONFIG_INCLUDE
+am__EXEEXT_FALSE
+am__EXEEXT_TRUE
+LTLIBOBJS
+LIBOBJS
+COLORIZE_SOURCE
+USE_PCRE_FALSE
+USE_PCRE_TRUE
+PCRE_LIBS
+PCRE_CFLAGS
+USE_INCLUDED_REGEX_FALSE
+USE_INCLUDED_REGEX_TRUE
+POSUB
+INTLLIBS
+XGETTEXT_EXTRA_OPTIONS
+MSGMERGE
+XGETTEXT_015
+XGETTEXT
+GMSGFMT_015
+MSGFMT_015
+GMSGFMT
+MSGFMT
+GETTEXT_MACRO_VERSION
+USE_NLS
+GNULIB_TEST_WARN_CFLAGS
+GNULIB_WARN_CFLAGS
+WARN_CFLAGS
+WERROR_CFLAGS
+HAVE_PERL_FALSE
+HAVE_PERL_TRUE
+LIBTESTS_LIBDEPS
+LIBGREPUTILS_LTLIBDEPS
+LIBGREPUTILS_LIBDEPS
+abs_aux_dir
+HAVE_SYS_UIO_H
+NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H
+NEXT_SYS_UIO_H
+NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H
+NEXT_SYS_IOCTL_H
+HAVE_SYS_IOCTL_H
+LIB_SETLOCALE
+GL_GNULIB_SELECT
+GL_GNULIB_PSELECT
+GL_GNULIB_SCHED_YIELD
+HAVE_STRUCT_SCHED_PARAM
+HAVE_SCHED_H
+NEXT_AS_FIRST_DIRECTIVE_SCHED_H
+NEXT_SCHED_H
+REPLACE_SCHED_YIELD
+HAVE_SCHED_YIELD
+LIB_PTHREAD_SIGMASK
+GL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK
+GL_GNULIB_PTHREAD_SPIN
+GL_GNULIB_PTHREAD_TSS
+GL_GNULIB_PTHREAD_COND
+GL_GNULIB_PTHREAD_RWLOCK
+GL_GNULIB_PTHREAD_MUTEX
+GL_GNULIB_PTHREAD_ONCE
+GL_GNULIB_PTHREAD_THREAD
+LIB_PTHREAD
+HAVE_PTHREAD_H
+NEXT_AS_FIRST_DIRECTIVE_PTHREAD_H
+NEXT_PTHREAD_H
+REPLACE_PTHREAD_SPIN_DESTROY
+REPLACE_PTHREAD_SPIN_UNLOCK
+REPLACE_PTHREAD_SPIN_TRYLOCK
+REPLACE_PTHREAD_SPIN_LOCK
+REPLACE_PTHREAD_SPIN_INIT
+REPLACE_PTHREAD_KEY_DELETE
+REPLACE_PTHREAD_GETSPECIFIC
+REPLACE_PTHREAD_SETSPECIFIC
+REPLACE_PTHREAD_KEY_CREATE
+REPLACE_PTHREAD_COND_DESTROY
+REPLACE_PTHREAD_COND_BROADCAST
+REPLACE_PTHREAD_COND_SIGNAL
+REPLACE_PTHREAD_COND_TIMEDWAIT
+REPLACE_PTHREAD_COND_WAIT
+REPLACE_PTHREAD_CONDATTR_DESTROY
+REPLACE_PTHREAD_CONDATTR_INIT
+REPLACE_PTHREAD_COND_INIT
+REPLACE_PTHREAD_RWLOCK_DESTROY
+REPLACE_PTHREAD_RWLOCK_UNLOCK
+REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK
+REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK
+REPLACE_PTHREAD_RWLOCK_TRYWRLOCK
+REPLACE_PTHREAD_RWLOCK_TRYRDLOCK
+REPLACE_PTHREAD_RWLOCK_WRLOCK
+REPLACE_PTHREAD_RWLOCK_RDLOCK
+REPLACE_PTHREAD_RWLOCKATTR_DESTROY
+REPLACE_PTHREAD_RWLOCKATTR_INIT
+REPLACE_PTHREAD_RWLOCK_INIT
+REPLACE_PTHREAD_MUTEX_DESTROY
+REPLACE_PTHREAD_MUTEX_UNLOCK
+REPLACE_PTHREAD_MUTEX_TIMEDLOCK
+REPLACE_PTHREAD_MUTEX_TRYLOCK
+REPLACE_PTHREAD_MUTEX_LOCK
+REPLACE_PTHREAD_MUTEXATTR_DESTROY
+REPLACE_PTHREAD_MUTEXATTR_SETROBUST
+REPLACE_PTHREAD_MUTEXATTR_GETROBUST
+REPLACE_PTHREAD_MUTEXATTR_SETTYPE
+REPLACE_PTHREAD_MUTEXATTR_GETTYPE
+REPLACE_PTHREAD_MUTEXATTR_INIT
+REPLACE_PTHREAD_MUTEX_INIT
+REPLACE_PTHREAD_ONCE
+REPLACE_PTHREAD_EXIT
+REPLACE_PTHREAD_JOIN
+REPLACE_PTHREAD_DETACH
+REPLACE_PTHREAD_EQUAL
+REPLACE_PTHREAD_SELF
+REPLACE_PTHREAD_ATTR_DESTROY
+REPLACE_PTHREAD_ATTR_SETDETACHSTATE
+REPLACE_PTHREAD_ATTR_GETDETACHSTATE
+REPLACE_PTHREAD_ATTR_INIT
+REPLACE_PTHREAD_CREATE
+HAVE_PTHREAD_SPIN_DESTROY
+HAVE_PTHREAD_SPIN_UNLOCK
+HAVE_PTHREAD_SPIN_TRYLOCK
+HAVE_PTHREAD_SPIN_LOCK
+HAVE_PTHREAD_SPIN_INIT
+HAVE_PTHREAD_KEY_DELETE
+HAVE_PTHREAD_GETSPECIFIC
+HAVE_PTHREAD_SETSPECIFIC
+HAVE_PTHREAD_KEY_CREATE
+HAVE_PTHREAD_COND_DESTROY
+HAVE_PTHREAD_COND_BROADCAST
+HAVE_PTHREAD_COND_SIGNAL
+HAVE_PTHREAD_COND_TIMEDWAIT
+HAVE_PTHREAD_COND_WAIT
+HAVE_PTHREAD_CONDATTR_DESTROY
+HAVE_PTHREAD_CONDATTR_INIT
+HAVE_PTHREAD_COND_INIT
+HAVE_PTHREAD_RWLOCK_DESTROY
+HAVE_PTHREAD_RWLOCK_UNLOCK
+HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK
+HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK
+HAVE_PTHREAD_RWLOCK_TRYWRLOCK
+HAVE_PTHREAD_RWLOCK_TRYRDLOCK
+HAVE_PTHREAD_RWLOCK_WRLOCK
+HAVE_PTHREAD_RWLOCK_RDLOCK
+HAVE_PTHREAD_RWLOCKATTR_DESTROY
+HAVE_PTHREAD_RWLOCKATTR_INIT
+HAVE_PTHREAD_RWLOCK_INIT
+HAVE_PTHREAD_MUTEX_DESTROY
+HAVE_PTHREAD_MUTEX_UNLOCK
+HAVE_PTHREAD_MUTEX_TIMEDLOCK
+HAVE_PTHREAD_MUTEX_TRYLOCK
+HAVE_PTHREAD_MUTEX_LOCK
+HAVE_PTHREAD_MUTEXATTR_DESTROY
+HAVE_PTHREAD_MUTEXATTR_SETROBUST
+HAVE_PTHREAD_MUTEXATTR_GETROBUST
+HAVE_PTHREAD_MUTEXATTR_SETTYPE
+HAVE_PTHREAD_MUTEXATTR_GETTYPE
+HAVE_PTHREAD_MUTEXATTR_INIT
+HAVE_PTHREAD_MUTEX_INIT
+HAVE_PTHREAD_ONCE
+HAVE_PTHREAD_EXIT
+HAVE_PTHREAD_JOIN
+HAVE_PTHREAD_DETACH
+HAVE_PTHREAD_EQUAL
+HAVE_PTHREAD_SELF
+HAVE_PTHREAD_ATTR_DESTROY
+HAVE_PTHREAD_ATTR_SETDETACHSTATE
+HAVE_PTHREAD_ATTR_GETDETACHSTATE
+HAVE_PTHREAD_ATTR_INIT
+HAVE_PTHREAD_CREATE
+HAVE_PTHREAD_PROCESS_SHARED
+HAVE_PTHREAD_MUTEX_ROBUST
+HAVE_PTHREAD_MUTEX_RECURSIVE
+HAVE_PTHREAD_CREATE_DETACHED
+HAVE_PTHREAD_SPINLOCK_T
+HAVE_PTHREAD_T
+GL_GENERATE_NETINET_IN_H_FALSE
+GL_GENERATE_NETINET_IN_H_TRUE
+NETINET_IN_H
+HAVE_NETINET_IN_H
+NEXT_AS_FIRST_DIRECTIVE_NETINET_IN_H
+NEXT_NETINET_IN_H
+LIB_NANOSLEEP
+LIB_SELECT
+LIBSOCKET
+HAVE_SYS_SELECT_H
+NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H
+NEXT_SYS_SELECT_H
+REPLACE_SELECT
+REPLACE_PSELECT
+HAVE_PSELECT
+INTL_MACOSX_LIBS
+GL_GNULIB_IOCTL
+INET_PTON_LIB
+GL_GNULIB_GETTIMEOFDAY
+NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H
+NEXT_SYS_TIME_H
+REPLACE_STRUCT_TIMEVAL
+REPLACE_GETTIMEOFDAY
+HAVE_SYS_TIME_H
+HAVE_STRUCT_TIMEVAL
+HAVE_GETTIMEOFDAY
+REPLACE_ITOLD
+GL_GENERATE_FLOAT_H_FALSE
+GL_GENERATE_FLOAT_H_TRUE
+FLOAT_H
+NEXT_AS_FIRST_DIRECTIVE_FLOAT_H
+NEXT_FLOAT_H
+LOCALE_TR_UTF8
+GL_GNULIB_INET_PTON
+GL_GNULIB_INET_NTOP
+NEXT_AS_FIRST_DIRECTIVE_ARPA_INET_H
+NEXT_ARPA_INET_H
+HAVE_ARPA_INET_H
+REPLACE_INET_PTON
+REPLACE_INET_NTOP
+HAVE_DECL_INET_PTON
+HAVE_DECL_INET_NTOP
+GL_GNULIB_ACCEPT4
+GL_GNULIB_SHUTDOWN
+GL_GNULIB_SETSOCKOPT
+GL_GNULIB_SENDTO
+GL_GNULIB_RECVFROM
+GL_GNULIB_SEND
+GL_GNULIB_RECV
+GL_GNULIB_LISTEN
+GL_GNULIB_GETSOCKOPT
+GL_GNULIB_GETSOCKNAME
+GL_GNULIB_GETPEERNAME
+GL_GNULIB_BIND
+GL_GNULIB_ACCEPT
+GL_GNULIB_CONNECT
+GL_GNULIB_SOCKET
+HAVE_WS2TCPIP_H
+HAVE_SYS_SOCKET_H
+NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H
+NEXT_SYS_SOCKET_H
+HAVE_ACCEPT4
+HAVE_SA_FAMILY_T
+HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY
+HAVE_STRUCT_SOCKADDR_STORAGE
+gltests_WITNESS
+GL_CXXFLAG_ALLOW_WARNINGS
+GL_CFLAG_ALLOW_WARNINGS
+HAVE_FEATURES_H
+NEXT_AS_FIRST_DIRECTIVE_WCHAR_H
+NEXT_WCHAR_H
+LIBUNISTRING_COMPILE_UNIWIDTH_WIDTH_FALSE
+LIBUNISTRING_COMPILE_UNIWIDTH_WIDTH_TRUE
+LIBUNISTRING_UNIWIDTH_H
+LIBUNISTRING_UNITYPES_H
+LIBUNISTRING_COMPILE_UNISTR_U8_UCTOMB_FALSE
+LIBUNISTRING_COMPILE_UNISTR_U8_UCTOMB_TRUE
+LIBUNISTRING_COMPILE_UNISTR_U8_MBTOUCR_FALSE
+LIBUNISTRING_COMPILE_UNISTR_U8_MBTOUCR_TRUE
+LIBUNISTRING_UNISTR_H
+HAVE_UNISTD_H
+NEXT_AS_FIRST_DIRECTIVE_UNISTD_H
+NEXT_UNISTD_H
+GL_GNULIB_MDA_TZSET
+GL_GNULIB_TZSET
+GL_GNULIB_TIME_RZ
+GL_GNULIB_TIME_R
+GL_GNULIB_TIMESPEC_GET
+GL_GNULIB_TIMEGM
+GL_GNULIB_STRPTIME
+GL_GNULIB_STRFTIME
+GL_GNULIB_NANOSLEEP
+GL_GNULIB_LOCALTIME
+GL_GNULIB_MKTIME
+GL_GNULIB_CTIME
+TIME_H_DEFINES_TIME_UTC
+UNISTD_H_DEFINES_STRUCT_TIMESPEC
+PTHREAD_H_DEFINES_STRUCT_TIMESPEC
+SYS_TIME_H_DEFINES_STRUCT_TIMESPEC
+TIME_H_DEFINES_STRUCT_TIMESPEC
+NEXT_AS_FIRST_DIRECTIVE_TIME_H
+NEXT_TIME_H
+REPLACE_LOCALTIME
+REPLACE_GMTIME
+GNULIB_GETTIMEOFDAY
+REPLACE_TZSET
+REPLACE_TIMEGM
+REPLACE_STRFTIME
+REPLACE_NANOSLEEP
+REPLACE_MKTIME
+REPLACE_LOCALTIME_R
+REPLACE_CTIME
+HAVE_TIMEZONE_T
+HAVE_TIMESPEC_GET
+HAVE_TIMEGM
+HAVE_STRPTIME
+HAVE_NANOSLEEP
+HAVE_DECL_LOCALTIME_R
+NEXT_AS_FIRST_DIRECTIVE_STRING_H
+NEXT_STRING_H
+NEXT_AS_FIRST_DIRECTIVE_STDLIB_H
+NEXT_STDLIB_H
+NEXT_AS_FIRST_DIRECTIVE_STDIO_H
+NEXT_STDIO_H
+HAVE__BOOL
+GL_GENERATE_STDBOOL_H_FALSE
+GL_GENERATE_STDBOOL_H_TRUE
+STDBOOL_H
+GL_GENERATE_STDARG_H_FALSE
+GL_GENERATE_STDARG_H_TRUE
+STDARG_H
+NEXT_AS_FIRST_DIRECTIVE_STDARG_H
+NEXT_STDARG_H
+GL_GENERATE_STDALIGN_H_FALSE
+GL_GENERATE_STDALIGN_H_TRUE
+STDALIGN_H
+GL_GENERATE_SIGSEGV_H_FALSE
+GL_GENERATE_SIGSEGV_H_TRUE
+SIGSEGV_H
+LIBSIGSEGV_PREFIX
+LTLIBSIGSEGV
+LIBSIGSEGV
+HAVE_LIBSIGSEGV
+NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H
+NEXT_SIGNAL_H
+GL_GNULIB_SIGACTION
+GL_GNULIB_SIGPROCMASK
+GL_GNULIB_SIGNAL_H_SIGPIPE
+GL_GNULIB_RAISE
+GL_GNULIB_PTHREAD_SIGMASK
+REPLACE_RAISE
+REPLACE_PTHREAD_SIGMASK
+HAVE_SIGHANDLER_T
+HAVE_TYPE_VOLATILE_SIG_ATOMIC_T
+HAVE_STRUCT_SIGACTION_SA_SIGACTION
+HAVE_SIGACTION
+HAVE_SIGINFO_T
+HAVE_SIGSET_T
+HAVE_RAISE
+HAVE_PTHREAD_SIGMASK
+HAVE_POSIX_SIGNALBLOCKING
+PERL
+LIB_NL_LANGINFO
+UNDEFINE_STRTOK_R
+REPLACE_STRSIGNAL
+REPLACE_STRERRORNAME_NP
+REPLACE_STRERROR_R
+REPLACE_STRERROR
+REPLACE_STRTOK_R
+REPLACE_STRCASESTR
+REPLACE_STRSTR
+REPLACE_STRNLEN
+REPLACE_STRNDUP
+REPLACE_STRNCAT
+REPLACE_STRDUP
+REPLACE_STRCHRNUL
+REPLACE_STPNCPY
+REPLACE_MEMMEM
+REPLACE_MEMCHR
+REPLACE_FFSLL
+HAVE_STRVERSCMP
+HAVE_DECL_STRSIGNAL
+HAVE_SIGDESCR_NP
+HAVE_SIGABBREV_NP
+HAVE_STRERRORNAME_NP
+HAVE_DECL_STRERROR_R
+HAVE_DECL_STRTOK_R
+HAVE_STRCASESTR
+HAVE_STRSEP
+HAVE_STRPBRK
+HAVE_DECL_STRNLEN
+HAVE_DECL_STRNDUP
+HAVE_DECL_STRDUP
+HAVE_STRCHRNUL
+HAVE_STPNCPY
+HAVE_STPCPY
+HAVE_RAWMEMCHR
+HAVE_DECL_MEMRCHR
+HAVE_MEMPCPY
+HAVE_DECL_MEMMEM
+HAVE_FFSLL
+HAVE_FFSL
+HAVE_EXPLICIT_BZERO
+HAVE_MBSLEN
+GL_GNULIB_MDA_STRDUP
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+GL_GNULIB_STRSIGNAL
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+GL_GNULIB_STRERROR
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+GL_GNULIB_MBSSEP
+GL_GNULIB_MBSSPN
+GL_GNULIB_MBSPBRK
+GL_GNULIB_MBSCSPN
+GL_GNULIB_MBSCASESTR
+GL_GNULIB_MBSPCASECMP
+GL_GNULIB_MBSNCASECMP
+GL_GNULIB_MBSCASECMP
+GL_GNULIB_MBSSTR
+GL_GNULIB_MBSRCHR
+GL_GNULIB_MBSCHR
+GL_GNULIB_MBSNLEN
+GL_GNULIB_MBSLEN
+GL_GNULIB_STRTOK_R
+GL_GNULIB_STRCASESTR
+GL_GNULIB_STRSTR
+GL_GNULIB_STRSEP
+GL_GNULIB_STRPBRK
+GL_GNULIB_STRNLEN
+GL_GNULIB_STRNDUP
+GL_GNULIB_STRNCAT
+GL_GNULIB_STRDUP
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+GL_GNULIB_STPNCPY
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+GL_GNULIB_RAWMEMCHR
+GL_GNULIB_MEMRCHR
+GL_GNULIB_MEMPCPY
+GL_GNULIB_MEMMEM
+GL_GNULIB_MEMCHR
+GL_GNULIB_FFSLL
+GL_GNULIB_FFSL
+GL_GNULIB_EXPLICIT_BZERO
+HAVE_VISIBILITY
+CFLAG_VISIBILITY
+LIB_MBRTOWC
+SED
+WINDOWS_STAT_INODES
+WINDOWS_64_BIT_OFF_T
+NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H
+NEXT_SYS_TYPES_H
+LTLIBMULTITHREAD
+LIBMULTITHREAD
+LTLIBTHREAD
+LIBTHREAD
+LIBSTDTHREAD
+GL_GNULIB_LOCALENAME
+GL_GNULIB_DUPLOCALE
+GL_GNULIB_SETLOCALE_NULL
+GL_GNULIB_SETLOCALE
+GL_GNULIB_LOCALECONV
+NEXT_AS_FIRST_DIRECTIVE_LOCALE_H
+NEXT_LOCALE_H
+HAVE_XLOCALE_H
+NEXT_AS_FIRST_DIRECTIVE_STDDEF_H
+NEXT_STDDEF_H
+GL_GENERATE_STDDEF_H_FALSE
+GL_GENERATE_STDDEF_H_TRUE
+STDDEF_H
+HAVE_WCHAR_T
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+REPLACE_NULL
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+REPLACE_STRUCT_LCONV
+REPLACE_FREELOCALE
+REPLACE_DUPLOCALE
+REPLACE_NEWLOCALE
+REPLACE_SETLOCALE
+REPLACE_LOCALECONV
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+HAVE_DUPLOCALE
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+LOCALCHARSET_TESTS_ENVIRONMENT
+GL_GNULIB_NL_LANGINFO
+HAVE_LANGINFO_YESEXPR
+HAVE_LANGINFO_ERA
+HAVE_LANGINFO_ALTMON
+HAVE_LANGINFO_T_FMT_AMPM
+HAVE_LANGINFO_CODESET
+HAVE_LANGINFO_H
+NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H
+NEXT_LANGINFO_H
+REPLACE_NL_LANGINFO
+HAVE_NL_LANGINFO
+LOCALE_ZH_CN
+LOCALE_FR_UTF8
+LOCALE_JA
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+GL_GNULIB_WCTYPE
+GL_GNULIB_ISWXDIGIT
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+NEXT_INTTYPES_H
+UINT64_MAX_EQ_ULONG_MAX
+UINT32_MAX_LT_UINTMAX_MAX
+PRIPTR_PREFIX
+INT64_MAX_EQ_LONG_MAX
+INT32_MAX_LT_INTMAX_MAX
+REPLACE_STRTOUMAX
+REPLACE_STRTOIMAX
+HAVE_IMAXDIV_T
+HAVE_DECL_STRTOUMAX
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+HAVE_DECL_IMAXDIV
+HAVE_DECL_IMAXABS
+GL_GENERATE_STDINT_H_FALSE
+GL_GENERATE_STDINT_H_TRUE
+STDINT_H
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+HAVE_SYS_BITYPES_H
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+PTRDIFF_T_SUFFIX
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+BITSIZEOF_SIZE_T
+BITSIZEOF_PTRDIFF_T
+APPLE_UNIVERSAL_BUILD
+HAVE_STDINT_H
+NEXT_AS_FIRST_DIRECTIVE_STDINT_H
+NEXT_STDINT_H
+HAVE_SYS_TYPES_H
+HAVE_INTTYPES_H
+HAVE_WCHAR_H
+GNULIBHEADERS_OVERRIDE_WINT_T
+GL_GENERATE_LIMITS_H_FALSE
+GL_GENERATE_LIMITS_H_TRUE
+LIMITS_H
+NEXT_AS_FIRST_DIRECTIVE_LIMITS_H
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+NEXT_AS_FIRST_DIRECTIVE_ICONV_H
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+GL_GNULIB_ICONV
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+REPLACE_ICONV_UTF
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+ICONV_CONST
+LTLIBICONV
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+HOST_CPU_C_ABI
+HOST_CPU
+LIB_HARD_LOCALE
+LIB_SETLOCALE_NULL
+LIB_SCHED_YIELD
+LIBPMULTITHREAD
+LIBPTHREAD
+LTLIBINTL
+LIBINTL
+GETOPT_CDEFS_H
+GETOPT_H
+HAVE_SYS_CDEFS_H
+HAVE_GETOPT_H
+NEXT_AS_FIRST_DIRECTIVE_GETOPT_H
+NEXT_GETOPT_H
+GL_GNULIB_MDA_UMASK
+GL_GNULIB_MDA_MKDIR
+GL_GNULIB_MDA_CHMOD
+GL_GNULIB_OVERRIDES_STRUCT_STAT
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+GL_GNULIB_FCHMODAT
+WINDOWS_64_BIT_ST_SIZE
+WINDOWS_STAT_TIMESPEC
+NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H
+NEXT_SYS_STAT_H
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+REPLACE_STAT
+REPLACE_MKNODAT
+REPLACE_MKNOD
+REPLACE_MKFIFOAT
+REPLACE_MKFIFO
+REPLACE_MKDIR
+REPLACE_LSTAT
+REPLACE_FUTIMENS
+REPLACE_FSTATAT
+REPLACE_FSTAT
+REPLACE_FCHMODAT
+HAVE_UTIMENSAT
+HAVE_MKNODAT
+HAVE_MKNOD
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+HAVE_MKFIFO
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+GL_GNULIB_MDA_GETW
+GL_GNULIB_MDA_FILENO
+GL_GNULIB_MDA_FDOPEN
+GL_GNULIB_MDA_FCLOSEALL
+GL_GNULIB_VSPRINTF_POSIX
+GL_GNULIB_VSNPRINTF
+GL_GNULIB_VPRINTF_POSIX
+GL_GNULIB_VPRINTF
+GL_GNULIB_VFPRINTF_POSIX
+GL_GNULIB_VFPRINTF
+GL_GNULIB_VDPRINTF
+GL_GNULIB_VSCANF
+GL_GNULIB_VFSCANF
+GL_GNULIB_VASPRINTF
+GL_GNULIB_TMPFILE
+GL_GNULIB_STDIO_H_SIGPIPE
+GL_GNULIB_STDIO_H_NONBLOCKING
+GL_GNULIB_SPRINTF_POSIX
+GL_GNULIB_SNPRINTF
+GL_GNULIB_SCANF
+GL_GNULIB_RENAMEAT
+GL_GNULIB_RENAME
+GL_GNULIB_REMOVE
+GL_GNULIB_PUTS
+GL_GNULIB_PUTCHAR
+GL_GNULIB_PUTC
+GL_GNULIB_PRINTF_POSIX
+GL_GNULIB_PRINTF
+GL_GNULIB_POPEN
+GL_GNULIB_PERROR
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+GL_GNULIB_OBSTACK_PRINTF_POSIX
+GL_GNULIB_OBSTACK_PRINTF
+GL_GNULIB_GETLINE
+GL_GNULIB_GETDELIM
+GL_GNULIB_GETCHAR
+GL_GNULIB_GETC
+GL_GNULIB_FWRITE
+GL_GNULIB_FTELLO
+GL_GNULIB_FTELL
+GL_GNULIB_FSEEKO
+GL_GNULIB_FSEEK
+GL_GNULIB_FSCANF
+GL_GNULIB_FREOPEN
+GL_GNULIB_FREAD
+GL_GNULIB_FPUTS
+GL_GNULIB_FPUTC
+GL_GNULIB_FPURGE
+GL_GNULIB_FPRINTF_POSIX
+GL_GNULIB_FPRINTF
+GL_GNULIB_FOPEN
+GL_GNULIB_FGETS
+GL_GNULIB_FGETC
+GL_GNULIB_FFLUSH
+GL_GNULIB_FDOPEN
+GL_GNULIB_FCLOSE
+GL_GNULIB_DPRINTF
+REPLACE_VSPRINTF
+REPLACE_VSNPRINTF
+REPLACE_VPRINTF
+REPLACE_VFPRINTF
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+REPLACE_STDIO_WRITE_FUNCS
+REPLACE_STDIO_READ_FUNCS
+REPLACE_SPRINTF
+REPLACE_SNPRINTF
+REPLACE_RENAMEAT
+REPLACE_RENAME
+REPLACE_REMOVE
+REPLACE_PRINTF
+REPLACE_POPEN
+REPLACE_PERROR
+REPLACE_OBSTACK_PRINTF
+REPLACE_GETLINE
+REPLACE_GETDELIM
+REPLACE_FTELLO
+REPLACE_FTELL
+REPLACE_FSEEKO
+REPLACE_FSEEK
+REPLACE_FREOPEN
+REPLACE_FPURGE
+REPLACE_FPRINTF
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+REPLACE_FFLUSH
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+HAVE_RENAMEAT
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+NEXT_FCNTL_H
+GL_GNULIB_MDA_OPEN
+GL_GNULIB_MDA_CREAT
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+GL_GNULIB_NONBLOCKING
+GL_GNULIB_FCNTL
+GL_GNULIB_CREAT
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+NEXT_ERRNO_H
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+NEXT_AS_FIRST_DIRECTIVE_DIRENT_H
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+GL_GNULIB_ISBLANK
+NEXT_AS_FIRST_DIRECTIVE_CTYPE_H
+NEXT_CTYPE_H
+PRAGMA_COLUMNS
+PRAGMA_SYSTEM_HEADER
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+INCLUDE_NEXT
+HAVE_ISBLANK
+pkglibexecdir
+lispdir
+GL_GNULIB_ALPHASORT
+GL_GNULIB_SCANDIR
+GL_GNULIB_FDOPENDIR
+GL_GNULIB_DIRFD
+GL_GNULIB_CLOSEDIR
+GL_GNULIB_REWINDDIR
+GL_GNULIB_READDIR
+GL_GNULIB_OPENDIR
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+REPLACE_OPENDIR
+HAVE_ALPHASORT
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+HAVE_READDIR
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+REPLACE_IOCTL
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+SYS_IOCTL_H_HAVE_WINSOCK2_H
+HAVE_MSVC_INVALID_PARAMETER_HANDLER
+UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS
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+REPLACE_UNLINK
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+REPLACE_READLINK
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+REPLACE_GETPASS
+REPLACE_GETPAGESIZE
+REPLACE_GETGROUPS
+REPLACE_GETLOGIN_R
+REPLACE_GETDTABLESIZE
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+REPLACE_GETCWD
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+REPLACE_FCHOWNAT
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+REPLACE_EXECVP
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+REPLACE_EXECLE
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+REPLACE_DUP
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+REPLACE_CHOWN
+REPLACE_ACCESS
+HAVE_SYS_PARAM_H
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+HAVE_DECL_TTYNAME_R
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+HAVE_DECL_SETHOSTNAME
+HAVE_DECL_GETUSERSHELL
+HAVE_DECL_GETPAGESIZE
+HAVE_DECL_GETLOGIN_R
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+HAVE_DECL_GETDOMAINNAME
+HAVE_DECL_FDATASYNC
+HAVE_DECL_FCHDIR
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+HAVE_DECL_ENVIRON
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+HAVE_UNLINKAT
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+HAVE_SYMLINK
+HAVE_SLEEP
+HAVE_SETHOSTNAME
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+HAVE_READLINK
+HAVE_PWRITE
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+  | --no-recurs | --no-recur | --no-recu | --no-rec | --no-re | --no-r)
+    no_recursion=yes ;;
+
+  -oldincludedir | --oldincludedir | --oldincludedi | --oldincluded \
+  | --oldinclude | --oldinclud | --oldinclu | --oldincl | --oldinc \
+  | --oldin | --oldi | --old | --ol | --o)
+    ac_prev=oldincludedir ;;
+  -oldincludedir=* | --oldincludedir=* | --oldincludedi=* | --oldincluded=* \
+  | --oldinclude=* | --oldinclud=* | --oldinclu=* | --oldincl=* | --oldinc=* \
+  | --oldin=* | --oldi=* | --old=* | --ol=* | --o=*)
+    oldincludedir=$ac_optarg ;;
+
+  -prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
+    ac_prev=prefix ;;
+  -prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*)
+    prefix=$ac_optarg ;;
+
+  -program-prefix | --program-prefix | --program-prefi | --program-pref \
+  | --program-pre | --program-pr | --program-p)
+    ac_prev=program_prefix ;;
+  -program-prefix=* | --program-prefix=* | --program-prefi=* \
+  | --program-pref=* | --program-pre=* | --program-pr=* | --program-p=*)
+    program_prefix=$ac_optarg ;;
+
+  -program-suffix | --program-suffix | --program-suffi | --program-suff \
+  | --program-suf | --program-su | --program-s)
+    ac_prev=program_suffix ;;
+  -program-suffix=* | --program-suffix=* | --program-suffi=* \
+  | --program-suff=* | --program-suf=* | --program-su=* | --program-s=*)
+    program_suffix=$ac_optarg ;;
+
+  -program-transform-name | --program-transform-name \
+  | --program-transform-nam | --program-transform-na \
+  | --program-transform-n | --program-transform- \
+  | --program-transform | --program-transfor \
+  | --program-transfo | --program-transf \
+  | --program-trans | --program-tran \
+  | --progr-tra | --program-tr | --program-t)
+    ac_prev=program_transform_name ;;
+  -program-transform-name=* | --program-transform-name=* \
+  | --program-transform-nam=* | --program-transform-na=* \
+  | --program-transform-n=* | --program-transform-=* \
+  | --program-transform=* | --program-transfor=* \
+  | --program-transfo=* | --program-transf=* \
+  | --program-trans=* | --program-tran=* \
+  | --progr-tra=* | --program-tr=* | --program-t=*)
+    program_transform_name=$ac_optarg ;;
+
+  -pdfdir | --pdfdir | --pdfdi | --pdfd | --pdf | --pd)
+    ac_prev=pdfdir ;;
+  -pdfdir=* | --pdfdir=* | --pdfdi=* | --pdfd=* | --pdf=* | --pd=*)
+    pdfdir=$ac_optarg ;;
+
+  -psdir | --psdir | --psdi | --psd | --ps)
+    ac_prev=psdir ;;
+  -psdir=* | --psdir=* | --psdi=* | --psd=* | --ps=*)
+    psdir=$ac_optarg ;;
+
+  -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+  | -silent | --silent | --silen | --sile | --sil)
+    silent=yes ;;
+
+  -runstatedir | --runstatedir | --runstatedi | --runstated \
+  | --runstate | --runstat | --runsta | --runst | --runs \
+  | --run | --ru | --r)
+    ac_prev=runstatedir ;;
+  -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
+  | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
+  | --run=* | --ru=* | --r=*)
+    runstatedir=$ac_optarg ;;
+
+  -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
+    ac_prev=sbindir ;;
+  -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
+  | --sbi=* | --sb=*)
+    sbindir=$ac_optarg ;;
+
+  -sharedstatedir | --sharedstatedir | --sharedstatedi \
+  | --sharedstated | --sharedstate | --sharedstat | --sharedsta \
+  | --sharedst | --shareds | --shared | --share | --shar \
+  | --sha | --sh)
+    ac_prev=sharedstatedir ;;
+  -sharedstatedir=* | --sharedstatedir=* | --sharedstatedi=* \
+  | --sharedstated=* | --sharedstate=* | --sharedstat=* | --sharedsta=* \
+  | --sharedst=* | --shareds=* | --shared=* | --share=* | --shar=* \
+  | --sha=* | --sh=*)
+    sharedstatedir=$ac_optarg ;;
+
+  -site | --site | --sit)
+    ac_prev=site ;;
+  -site=* | --site=* | --sit=*)
+    site=$ac_optarg ;;
+
+  -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
+    ac_prev=srcdir ;;
+  -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
+    srcdir=$ac_optarg ;;
+
+  -sysconfdir | --sysconfdir | --sysconfdi | --sysconfd | --sysconf \
+  | --syscon | --sysco | --sysc | --sys | --sy)
+    ac_prev=sysconfdir ;;
+  -sysconfdir=* | --sysconfdir=* | --sysconfdi=* | --sysconfd=* | --sysconf=* \
+  | --syscon=* | --sysco=* | --sysc=* | --sys=* | --sy=*)
+    sysconfdir=$ac_optarg ;;
+
+  -target | --target | --targe | --targ | --tar | --ta | --t)
+    ac_prev=target_alias ;;
+  -target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=* | --t=*)
+    target_alias=$ac_optarg ;;
+
+  -v | -verbose | --verbose | --verbos | --verbo | --verb)
+    verbose=yes ;;
+
+  -version | --version | --versio | --versi | --vers | -V)
+    ac_init_version=: ;;
+
+  -with-* | --with-*)
+    ac_useropt=`expr "x$ac_option" : 'x-*with-\([^=]*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
+      as_fn_error $? "invalid package name: \`$ac_useropt'"
+    ac_useropt_orig=$ac_useropt
+    ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
+    case $ac_user_opts in
+      *"
+"with_$ac_useropt"
+"*) ;;
+      *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--with-$ac_useropt_orig"
+	 ac_unrecognized_sep=', ';;
+    esac
+    eval with_$ac_useropt=\$ac_optarg ;;
+
+  -without-* | --without-*)
+    ac_useropt=`expr "x$ac_option" : 'x-*without-\(.*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
+      as_fn_error $? "invalid package name: \`$ac_useropt'"
+    ac_useropt_orig=$ac_useropt
+    ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
+    case $ac_user_opts in
+      *"
+"with_$ac_useropt"
+"*) ;;
+      *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--without-$ac_useropt_orig"
+	 ac_unrecognized_sep=', ';;
+    esac
+    eval with_$ac_useropt=no ;;
+
+  --x)
+    # Obsolete; use --with-x.
+    with_x=yes ;;
+
+  -x-includes | --x-includes | --x-include | --x-includ | --x-inclu \
+  | --x-incl | --x-inc | --x-in | --x-i)
+    ac_prev=x_includes ;;
+  -x-includes=* | --x-includes=* | --x-include=* | --x-includ=* | --x-inclu=* \
+  | --x-incl=* | --x-inc=* | --x-in=* | --x-i=*)
+    x_includes=$ac_optarg ;;
+
+  -x-libraries | --x-libraries | --x-librarie | --x-librari \
+  | --x-librar | --x-libra | --x-libr | --x-lib | --x-li | --x-l)
+    ac_prev=x_libraries ;;
+  -x-libraries=* | --x-libraries=* | --x-librarie=* | --x-librari=* \
+  | --x-librar=* | --x-libra=* | --x-libr=* | --x-lib=* | --x-li=* | --x-l=*)
+    x_libraries=$ac_optarg ;;
+
+  -*) as_fn_error $? "unrecognized option: \`$ac_option'
+Try \`$0 --help' for more information"
+    ;;
+
+  *=*)
+    ac_envvar=`expr "x$ac_option" : 'x\([^=]*\)='`
+    # Reject names that are not valid shell variable names.
+    case $ac_envvar in #(
+      '' | [0-9]* | *[!_$as_cr_alnum]* )
+      as_fn_error $? "invalid variable name: \`$ac_envvar'" ;;
+    esac
+    eval $ac_envvar=\$ac_optarg
+    export $ac_envvar ;;
+
+  *)
+    # FIXME: should be removed in autoconf 3.0.
+    printf "%s\n" "$as_me: WARNING: you should use --build, --host, --target" >&2
+    expr "x$ac_option" : ".*[^-._$as_cr_alnum]" >/dev/null &&
+      printf "%s\n" "$as_me: WARNING: invalid host type: $ac_option" >&2
+    : "${build_alias=$ac_option} ${host_alias=$ac_option} ${target_alias=$ac_option}"
+    ;;
+
+  esac
+done
+
+if test -n "$ac_prev"; then
+  ac_option=--`echo $ac_prev | sed 's/_/-/g'`
+  as_fn_error $? "missing argument to $ac_option"
+fi
+
+if test -n "$ac_unrecognized_opts"; then
+  case $enable_option_checking in
+    no) ;;
+    fatal) as_fn_error $? "unrecognized options: $ac_unrecognized_opts" ;;
+    *)     printf "%s\n" "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2 ;;
+  esac
+fi
+
+# Check all directory arguments for consistency.
+for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
+		datadir sysconfdir sharedstatedir localstatedir includedir \
+		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
+		libdir localedir mandir runstatedir
+do
+  eval ac_val=\$$ac_var
+  # Remove trailing slashes.
+  case $ac_val in
+    */ )
+      ac_val=`expr "X$ac_val" : 'X\(.*[^/]\)' \| "X$ac_val" : 'X\(.*\)'`
+      eval $ac_var=\$ac_val;;
+  esac
+  # Be sure to have absolute directory names.
+  case $ac_val in
+    [\\/$]* | ?:[\\/]* )  continue;;
+    NONE | '' ) case $ac_var in *prefix ) continue;; esac;;
+  esac
+  as_fn_error $? "expected an absolute directory name for --$ac_var: $ac_val"
+done
+
+# There might be people who depend on the old broken behavior: `$host'
+# used to hold the argument of --host etc.
+# FIXME: To remove some day.
+build=$build_alias
+host=$host_alias
+target=$target_alias
+
+# FIXME: To remove some day.
+if test "x$host_alias" != x; then
+  if test "x$build_alias" = x; then
+    cross_compiling=maybe
+  elif test "x$build_alias" != "x$host_alias"; then
+    cross_compiling=yes
+  fi
+fi
+
+ac_tool_prefix=
+test -n "$host_alias" && ac_tool_prefix=$host_alias-
+
+test "$silent" = yes && exec 6>/dev/null
+
+
+ac_pwd=`pwd` && test -n "$ac_pwd" &&
+ac_ls_di=`ls -di .` &&
+ac_pwd_ls_di=`cd "$ac_pwd" && ls -di .` ||
+  as_fn_error $? "working directory cannot be determined"
+test "X$ac_ls_di" = "X$ac_pwd_ls_di" ||
+  as_fn_error $? "pwd does not report name of working directory"
+
+
+# Find the source files, if location was not specified.
+if test -z "$srcdir"; then
+  ac_srcdir_defaulted=yes
+  # Try the directory containing this script, then the parent directory.
+  ac_confdir=`$as_dirname -- "$as_myself" ||
+$as_expr X"$as_myself" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$as_myself" : 'X\(//\)[^/]' \| \
+	 X"$as_myself" : 'X\(//\)$' \| \
+	 X"$as_myself" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X"$as_myself" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+  srcdir=$ac_confdir
+  if test ! -r "$srcdir/$ac_unique_file"; then
+    srcdir=..
+  fi
+else
+  ac_srcdir_defaulted=no
+fi
+if test ! -r "$srcdir/$ac_unique_file"; then
+  test "$ac_srcdir_defaulted" = yes && srcdir="$ac_confdir or .."
+  as_fn_error $? "cannot find sources ($ac_unique_file) in $srcdir"
+fi
+ac_msg="sources are in $srcdir, but \`cd $srcdir' does not work"
+ac_abs_confdir=`(
+	cd "$srcdir" && test -r "./$ac_unique_file" || as_fn_error $? "$ac_msg"
+	pwd)`
+# When building in place, set srcdir=.
+if test "$ac_abs_confdir" = "$ac_pwd"; then
+  srcdir=.
+fi
+# Remove unnecessary trailing slashes from srcdir.
+# Double slashes in file names in object file debugging info
+# mess up M-x gdb in Emacs.
+case $srcdir in
+*/) srcdir=`expr "X$srcdir" : 'X\(.*[^/]\)' \| "X$srcdir" : 'X\(.*\)'`;;
+esac
+for ac_var in $ac_precious_vars; do
+  eval ac_env_${ac_var}_set=\${${ac_var}+set}
+  eval ac_env_${ac_var}_value=\$${ac_var}
+  eval ac_cv_env_${ac_var}_set=\${${ac_var}+set}
+  eval ac_cv_env_${ac_var}_value=\$${ac_var}
+done
+
+#
+# Report the --help message.
+#
+if test "$ac_init_help" = "long"; then
+  # Omit some internal or obsolete options to make the list less imposing.
+  # This message is too long to be a string in the A/UX 3.1 sh.
+  cat <<_ACEOF
+\`configure' configures GNU grep 3.7 to adapt to many kinds of systems.
+
+Usage: $0 [OPTION]... [VAR=VALUE]...
+
+To assign environment variables (e.g., CC, CFLAGS...), specify them as
+VAR=VALUE.  See below for descriptions of some of the useful variables.
+
+Defaults for the options are specified in brackets.
+
+Configuration:
+  -h, --help              display this help and exit
+      --help=short        display options specific to this package
+      --help=recursive    display the short help of all the included packages
+  -V, --version           display version information and exit
+  -q, --quiet, --silent   do not print \`checking ...' messages
+      --cache-file=FILE   cache test results in FILE [disabled]
+  -C, --config-cache      alias for \`--cache-file=config.cache'
+  -n, --no-create         do not create output files
+      --srcdir=DIR        find the sources in DIR [configure dir or \`..']
+
+Installation directories:
+  --prefix=PREFIX         install architecture-independent files in PREFIX
+                          [$ac_default_prefix]
+  --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
+                          [PREFIX]
+
+By default, \`make install' will install all the files in
+\`$ac_default_prefix/bin', \`$ac_default_prefix/lib' etc.  You can specify
+an installation prefix other than \`$ac_default_prefix' using \`--prefix',
+for instance \`--prefix=\$HOME'.
+
+For better control, use the options below.
+
+Fine tuning of the installation directories:
+  --bindir=DIR            user executables [EPREFIX/bin]
+  --sbindir=DIR           system admin executables [EPREFIX/sbin]
+  --libexecdir=DIR        program executables [EPREFIX/libexec]
+  --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
+  --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
+  --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
+  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
+  --libdir=DIR            object code libraries [EPREFIX/lib]
+  --includedir=DIR        C header files [PREFIX/include]
+  --oldincludedir=DIR     C header files for non-gcc [/usr/include]
+  --datarootdir=DIR       read-only arch.-independent data root [PREFIX/share]
+  --datadir=DIR           read-only architecture-independent data [DATAROOTDIR]
+  --infodir=DIR           info documentation [DATAROOTDIR/info]
+  --localedir=DIR         locale-dependent data [DATAROOTDIR/locale]
+  --mandir=DIR            man documentation [DATAROOTDIR/man]
+  --docdir=DIR            documentation root [DATAROOTDIR/doc/grep]
+  --htmldir=DIR           html documentation [DOCDIR]
+  --dvidir=DIR            dvi documentation [DOCDIR]
+  --pdfdir=DIR            pdf documentation [DOCDIR]
+  --psdir=DIR             ps documentation [DOCDIR]
+_ACEOF
+
+  cat <<\_ACEOF
+
+Program names:
+  --program-prefix=PREFIX            prepend PREFIX to installed program names
+  --program-suffix=SUFFIX            append SUFFIX to installed program names
+  --program-transform-name=PROGRAM   run sed PROGRAM on installed program names
+
+System types:
+  --build=BUILD     configure for building on BUILD [guessed]
+  --host=HOST       cross-compile to build programs to run on HOST [BUILD]
+_ACEOF
+fi
+
+if test -n "$ac_init_help"; then
+  case $ac_init_help in
+     short | recursive ) echo "Configuration of GNU grep 3.7:";;
+   esac
+  cat <<\_ACEOF
+
+Optional Features:
+  --disable-option-checking  ignore unrecognized --enable/--with options
+  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
+  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
+  --enable-silent-rules   less verbose build output (undo: "make V=1")
+  --disable-silent-rules  verbose build output (undo: "make V=0")
+  --enable-dependency-tracking
+                          do not reject slow dependency extractors
+  --disable-dependency-tracking
+                          speeds up one-time build
+  --disable-largefile     omit support for large files
+  --disable-year2038      omit support for timestamps past the year 2038
+  --enable-threads={isoc|posix|isoc+posix|windows}
+                          specify multithreading API
+  --disable-threads       build without multithread safety
+  --enable-cross-guesses={conservative|risky}
+                          specify policy for cross-compilation guesses
+  --disable-assert        turn off assertions
+  --disable-rpath         do not hardcode runtime library paths
+  --enable-gcc-warnings   turn on lots of GCC warnings (for developers)
+  --disable-nls           do not use Native Language Support
+  --disable-perl-regexp   disable perl-regexp (pcre) support
+
+Optional Packages:
+  --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
+  --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
+  --with-gnu-ld           assume the C compiler uses GNU ld [default=no]
+  --with-libiconv-prefix[=DIR]  search for libiconv in DIR/include and DIR/lib
+  --without-libiconv-prefix     don't search for libiconv in includedir and libdir
+  --without-included-regex
+                          don't compile regex; this is the default on systems
+                          with recent-enough versions of the GNU C Library
+                          (use with caution on other systems).
+  --with-libsigsegv       use the GNU libsigsegv library, when present,
+                          instead of the gnulib module 'sigsegv'
+  --with-libsigsegv-prefix[=DIR]  search for libsigsegv in DIR/include and DIR/lib
+  --without-libsigsegv-prefix     don't search for libsigsegv in includedir and libdir
+  --with-packager         String identifying the packager of this software
+  --with-packager-version Packager-specific version information
+  --with-packager-bug-reports
+                          Packager info for bug reports (URL/e-mail/...)
+  --with-libintl-prefix[=DIR]  search for libintl in DIR/include and DIR/lib
+  --without-libintl-prefix     don't search for libintl in includedir and libdir
+
+Some influential environment variables:
+  CC          C compiler command
+  CFLAGS      C compiler flags
+  LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
+              nonstandard directory <lib dir>
+  LIBS        libraries to pass to the linker, e.g. -l<library>
+  CPPFLAGS    (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
+              you have headers in a nonstandard directory <include dir>
+  CPP         C preprocessor
+  PKG_CONFIG  path to pkg-config utility
+  PKG_CONFIG_PATH
+              directories to add to pkg-config's search path
+  PKG_CONFIG_LIBDIR
+              path overriding pkg-config's built-in search path
+  PCRE_CFLAGS C compiler flags for PCRE, overriding pkg-config
+  PCRE_LIBS   linker flags for PCRE, overriding pkg-config
+
+Use these variables to override the choices made by `configure' or to help
+it to find libraries and programs with nonstandard names/locations.
+
+Report bugs to <bug-grep@gnu.org>.
+GNU grep home page: <https://www.gnu.org/software/grep/>.
+General help using GNU software: <https://www.gnu.org/gethelp/>.
+_ACEOF
+ac_status=$?
+fi
+
+if test "$ac_init_help" = "recursive"; then
+  # If there are subdirs, report their specific --help.
+  for ac_dir in : $ac_subdirs_all; do test "x$ac_dir" = x: && continue
+    test -d "$ac_dir" ||
+      { cd "$srcdir" && ac_pwd=`pwd` && srcdir=. && test -d "$ac_dir"; } ||
+      continue
+    ac_builddir=.
+
+case "$ac_dir" in
+.) ac_dir_suffix= ac_top_builddir_sub=. ac_top_build_prefix= ;;
+*)
+  ac_dir_suffix=/`printf "%s\n" "$ac_dir" | sed 's|^\.[\\/]||'`
+  # A ".." for each directory in $ac_dir_suffix.
+  ac_top_builddir_sub=`printf "%s\n" "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
+  case $ac_top_builddir_sub in
+  "") ac_top_builddir_sub=. ac_top_build_prefix= ;;
+  *)  ac_top_build_prefix=$ac_top_builddir_sub/ ;;
+  esac ;;
+esac
+ac_abs_top_builddir=$ac_pwd
+ac_abs_builddir=$ac_pwd$ac_dir_suffix
+# for backward compatibility:
+ac_top_builddir=$ac_top_build_prefix
+
+case $srcdir in
+  .)  # We are building in place.
+    ac_srcdir=.
+    ac_top_srcdir=$ac_top_builddir_sub
+    ac_abs_top_srcdir=$ac_pwd ;;
+  [\\/]* | ?:[\\/]* )  # Absolute name.
+    ac_srcdir=$srcdir$ac_dir_suffix;
+    ac_top_srcdir=$srcdir
+    ac_abs_top_srcdir=$srcdir ;;
+  *) # Relative name.
+    ac_srcdir=$ac_top_build_prefix$srcdir$ac_dir_suffix
+    ac_top_srcdir=$ac_top_build_prefix$srcdir
+    ac_abs_top_srcdir=$ac_pwd/$srcdir ;;
+esac
+ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
+
+    cd "$ac_dir" || { ac_status=$?; continue; }
+    # Check for configure.gnu first; this name is used for a wrapper for
+    # Metaconfig's "Configure" on case-insensitive file systems.
+    if test -f "$ac_srcdir/configure.gnu"; then
+      echo &&
+      $SHELL "$ac_srcdir/configure.gnu" --help=recursive
+    elif test -f "$ac_srcdir/configure"; then
+      echo &&
+      $SHELL "$ac_srcdir/configure" --help=recursive
+    else
+      printf "%s\n" "$as_me: WARNING: no configuration information is in $ac_dir" >&2
+    fi || ac_status=$?
+    cd "$ac_pwd" || { ac_status=$?; break; }
+  done
+fi
+
+test -n "$ac_init_help" && exit $ac_status
+if $ac_init_version; then
+  cat <<\_ACEOF
+GNU grep configure 3.7
+generated by GNU Autoconf 2.71
+
+Copyright (C) 2021 Free Software Foundation, Inc.
+This configure script is free software; the Free Software Foundation
+gives unlimited permission to copy, distribute and modify it.
+_ACEOF
+  exit
+fi
+
+## ------------------------ ##
+## Autoconf initialization. ##
+## ------------------------ ##
+
+# ac_fn_c_try_compile LINENO
+# --------------------------
+# Try to compile conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_compile ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  rm -f conftest.$ac_objext conftest.beam
+  if { { ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_compile") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext
+then :
+  ac_retval=0
+else $as_nop
+  printf "%s\n" "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_retval=1
+fi
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_compile
+
+# ac_fn_c_check_header_compile LINENO HEADER VAR INCLUDES
+# -------------------------------------------------------
+# Tests whether HEADER exists and can be compiled using the include files in
+# INCLUDES, setting the cache variable VAR accordingly.
+ac_fn_c_check_header_compile ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+printf %s "checking for $2... " >&6; }
+if eval test \${$3+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+#include <$2>
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  eval "$3=yes"
+else $as_nop
+  eval "$3=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+eval ac_res=\$$3
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_c_check_header_compile
+
+# ac_fn_c_try_cpp LINENO
+# ----------------------
+# Try to preprocess conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_cpp ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if { { ac_try="$ac_cpp conftest.$ac_ext"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } > conftest.i && {
+	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       }
+then :
+  ac_retval=0
+else $as_nop
+  printf "%s\n" "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+    ac_retval=1
+fi
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_cpp
+
+# ac_fn_c_check_type LINENO TYPE VAR INCLUDES
+# -------------------------------------------
+# Tests whether TYPE exists after having included INCLUDES, setting cache
+# variable VAR accordingly.
+ac_fn_c_check_type ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+printf %s "checking for $2... " >&6; }
+if eval test \${$3+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  eval "$3=no"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main (void)
+{
+if (sizeof ($2))
+	 return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main (void)
+{
+if (sizeof (($2)))
+	    return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+
+else $as_nop
+  eval "$3=yes"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+eval ac_res=\$$3
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_c_check_type
+
+# ac_fn_c_try_link LINENO
+# -----------------------
+# Try to link conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_link ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  rm -f conftest.$ac_objext conftest.beam conftest$ac_exeext
+  if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest$ac_exeext && {
+	 test "$cross_compiling" = yes ||
+	 test -x conftest$ac_exeext
+       }
+then :
+  ac_retval=0
+else $as_nop
+  printf "%s\n" "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_retval=1
+fi
+  # Delete the IPA/IPO (Inter Procedural Analysis/Optimization) information
+  # created by the PGI compiler (conftest_ipa8_conftest.oo), as it would
+  # interfere with the next link command; also delete a directory that is
+  # left behind by Apple's compiler.  We do this before executing the actions.
+  rm -rf conftest.dSYM conftest_ipa8_conftest.oo
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_link
+
+# ac_fn_c_try_run LINENO
+# ----------------------
+# Try to run conftest.$ac_ext, and return whether this succeeded. Assumes that
+# executables *can* be run.
+ac_fn_c_try_run ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && { ac_try='./conftest$ac_exeext'
+  { { case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }
+then :
+  ac_retval=0
+else $as_nop
+  printf "%s\n" "$as_me: program exited with status $ac_status" >&5
+       printf "%s\n" "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+       ac_retval=$ac_status
+fi
+  rm -rf conftest.dSYM conftest_ipa8_conftest.oo
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_run
+
+# ac_fn_c_check_func LINENO FUNC VAR
+# ----------------------------------
+# Tests whether FUNC exists, setting the cache variable VAR accordingly
+ac_fn_c_check_func ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+printf %s "checking for $2... " >&6; }
+if eval test \${$3+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+/* Define $2 to an innocuous variant, in case <limits.h> declares $2.
+   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
+#define $2 innocuous_$2
+
+/* System header to define __stub macros and hopefully few prototypes,
+   which can conflict with char $2 (); below.  */
+
+#include <limits.h>
+#undef $2
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char $2 ();
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined __stub_$2 || defined __stub___$2
+choke me
+#endif
+
+int
+main (void)
+{
+return $2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  eval "$3=yes"
+else $as_nop
+  eval "$3=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+eval ac_res=\$$3
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_c_check_func
+
+# ac_fn_check_decl LINENO SYMBOL VAR INCLUDES EXTRA-OPTIONS FLAG-VAR
+# ------------------------------------------------------------------
+# Tests whether SYMBOL is declared in INCLUDES, setting cache variable VAR
+# accordingly. Pass EXTRA-OPTIONS to the compiler, using FLAG-VAR.
+ac_fn_check_decl ()
+{
+  ac_save_ac_compile="$ac_compile"
+  if test -n "$ac_compile_for_check_decl"; then
+    ac_compile="$ac_compile_for_check_decl"
+  fi
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  as_decl_name=`echo $2|sed 's/ *(.*//'`
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $as_decl_name is declared" >&5
+printf %s "checking whether $as_decl_name is declared... " >&6; }
+if eval test \${$3+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  as_decl_use=`echo $2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'`
+  eval ac_save_FLAGS=\$$6
+  as_fn_append $6 " $5"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main (void)
+{
+#ifndef $as_decl_name
+#ifdef __cplusplus
+  (void) $as_decl_use;
+#else
+  (void) $as_decl_name;
+#endif
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  eval "$3=yes"
+else $as_nop
+  eval "$3=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+  eval $6=\$ac_save_FLAGS
+
+fi
+eval ac_res=\$$3
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  ac_compile="$ac_save_ac_compile"
+
+} # ac_fn_check_decl
+
+# ac_fn_c_compute_int LINENO EXPR VAR INCLUDES
+# --------------------------------------------
+# Tries to find the compile-time value of EXPR in a program that includes
+# INCLUDES, setting VAR accordingly. Returns whether the value could be
+# computed
+ac_fn_c_compute_int ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if test "$cross_compiling" = yes; then
+    # Depending upon the size, compute the lo and hi bounds.
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main (void)
+{
+static int test_array [1 - 2 * !(($2) >= 0)];
+test_array [0] = 0;
+return test_array [0];
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_lo=0 ac_mid=0
+  while :; do
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main (void)
+{
+static int test_array [1 - 2 * !(($2) <= $ac_mid)];
+test_array [0] = 0;
+return test_array [0];
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_hi=$ac_mid; break
+else $as_nop
+  as_fn_arith $ac_mid + 1 && ac_lo=$as_val
+			if test $ac_lo -le $ac_mid; then
+			  ac_lo= ac_hi=
+			  break
+			fi
+			as_fn_arith 2 '*' $ac_mid + 1 && ac_mid=$as_val
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+  done
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main (void)
+{
+static int test_array [1 - 2 * !(($2) < 0)];
+test_array [0] = 0;
+return test_array [0];
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_hi=-1 ac_mid=-1
+  while :; do
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main (void)
+{
+static int test_array [1 - 2 * !(($2) >= $ac_mid)];
+test_array [0] = 0;
+return test_array [0];
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_lo=$ac_mid; break
+else $as_nop
+  as_fn_arith '(' $ac_mid ')' - 1 && ac_hi=$as_val
+			if test $ac_mid -le $ac_hi; then
+			  ac_lo= ac_hi=
+			  break
+			fi
+			as_fn_arith 2 '*' $ac_mid && ac_mid=$as_val
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+  done
+else $as_nop
+  ac_lo= ac_hi=
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+# Binary search between lo and hi bounds.
+while test "x$ac_lo" != "x$ac_hi"; do
+  as_fn_arith '(' $ac_hi - $ac_lo ')' / 2 + $ac_lo && ac_mid=$as_val
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main (void)
+{
+static int test_array [1 - 2 * !(($2) <= $ac_mid)];
+test_array [0] = 0;
+return test_array [0];
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_hi=$ac_mid
+else $as_nop
+  as_fn_arith '(' $ac_mid ')' + 1 && ac_lo=$as_val
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+done
+case $ac_lo in #((
+?*) eval "$3=\$ac_lo"; ac_retval=0 ;;
+'') ac_retval=1 ;;
+esac
+  else
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+static long int longval (void) { return $2; }
+static unsigned long int ulongval (void) { return $2; }
+#include <stdio.h>
+#include <stdlib.h>
+int
+main (void)
+{
+
+  FILE *f = fopen ("conftest.val", "w");
+  if (! f)
+    return 1;
+  if (($2) < 0)
+    {
+      long int i = longval ();
+      if (i != ($2))
+	return 1;
+      fprintf (f, "%ld", i);
+    }
+  else
+    {
+      unsigned long int i = ulongval ();
+      if (i != ($2))
+	return 1;
+      fprintf (f, "%lu", i);
+    }
+  /* Do not output a trailing newline, as this causes \r\n confusion
+     on some platforms.  */
+  return ferror (f) || fclose (f) != 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  echo >>conftest.val; read $3 <conftest.val; ac_retval=0
+else $as_nop
+  ac_retval=1
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f conftest.val
+
+  fi
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_compute_int
+
+# ac_fn_c_check_member LINENO AGGR MEMBER VAR INCLUDES
+# ----------------------------------------------------
+# Tries to find if the field MEMBER exists in type AGGR, after including
+# INCLUDES, setting cache variable VAR accordingly.
+ac_fn_c_check_member ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2.$3" >&5
+printf %s "checking for $2.$3... " >&6; }
+if eval test \${$4+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$5
+int
+main (void)
+{
+static $2 ac_aggr;
+if (ac_aggr.$3)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  eval "$4=yes"
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$5
+int
+main (void)
+{
+static $2 ac_aggr;
+if (sizeof ac_aggr.$3)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  eval "$4=yes"
+else $as_nop
+  eval "$4=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+eval ac_res=\$$4
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_c_check_member
+ac_configure_args_raw=
+for ac_arg
+do
+  case $ac_arg in
+  *\'*)
+    ac_arg=`printf "%s\n" "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
+  esac
+  as_fn_append ac_configure_args_raw " '$ac_arg'"
+done
+
+case $ac_configure_args_raw in
+  *$as_nl*)
+    ac_safe_unquote= ;;
+  *)
+    ac_unsafe_z='|&;<>()$`\\"*?[ ''	' # This string ends in space, tab.
+    ac_unsafe_a="$ac_unsafe_z#~"
+    ac_safe_unquote="s/ '\\([^$ac_unsafe_a][^$ac_unsafe_z]*\\)'/ \\1/g"
+    ac_configure_args_raw=`      printf "%s\n" "$ac_configure_args_raw" | sed "$ac_safe_unquote"`;;
+esac
+
+cat >config.log <<_ACEOF
+This file contains any messages produced by compilers while
+running configure, to aid debugging if configure makes a mistake.
+
+It was created by GNU grep $as_me 3.7, which was
+generated by GNU Autoconf 2.71.  Invocation command line was
+
+  $ $0$ac_configure_args_raw
+
+_ACEOF
+exec 5>>config.log
+{
+cat <<_ASUNAME
+## --------- ##
+## Platform. ##
+## --------- ##
+
+hostname = `(hostname || uname -n) 2>/dev/null | sed 1q`
+uname -m = `(uname -m) 2>/dev/null || echo unknown`
+uname -r = `(uname -r) 2>/dev/null || echo unknown`
+uname -s = `(uname -s) 2>/dev/null || echo unknown`
+uname -v = `(uname -v) 2>/dev/null || echo unknown`
+
+/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null || echo unknown`
+/bin/uname -X     = `(/bin/uname -X) 2>/dev/null     || echo unknown`
+
+/bin/arch              = `(/bin/arch) 2>/dev/null              || echo unknown`
+/usr/bin/arch -k       = `(/usr/bin/arch -k) 2>/dev/null       || echo unknown`
+/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null || echo unknown`
+/usr/bin/hostinfo      = `(/usr/bin/hostinfo) 2>/dev/null      || echo unknown`
+/bin/machine           = `(/bin/machine) 2>/dev/null           || echo unknown`
+/usr/bin/oslevel       = `(/usr/bin/oslevel) 2>/dev/null       || echo unknown`
+/bin/universe          = `(/bin/universe) 2>/dev/null          || echo unknown`
+
+_ASUNAME
+
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    printf "%s\n" "PATH: $as_dir"
+  done
+IFS=$as_save_IFS
+
+} >&5
+
+cat >&5 <<_ACEOF
+
+
+## ----------- ##
+## Core tests. ##
+## ----------- ##
+
+_ACEOF
+
+
+# Keep a trace of the command line.
+# Strip out --no-create and --no-recursion so they do not pile up.
+# Strip out --silent because we don't want to record it for future runs.
+# Also quote any args containing shell meta-characters.
+# Make two passes to allow for proper duplicate-argument suppression.
+ac_configure_args=
+ac_configure_args0=
+ac_configure_args1=
+ac_must_keep_next=false
+for ac_pass in 1 2
+do
+  for ac_arg
+  do
+    case $ac_arg in
+    -no-create | --no-c* | -n | -no-recursion | --no-r*) continue ;;
+    -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+    | -silent | --silent | --silen | --sile | --sil)
+      continue ;;
+    *\'*)
+      ac_arg=`printf "%s\n" "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    esac
+    case $ac_pass in
+    1) as_fn_append ac_configure_args0 " '$ac_arg'" ;;
+    2)
+      as_fn_append ac_configure_args1 " '$ac_arg'"
+      if test $ac_must_keep_next = true; then
+	ac_must_keep_next=false # Got value, back to normal.
+      else
+	case $ac_arg in
+	  *=* | --config-cache | -C | -disable-* | --disable-* \
+	  | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
+	  | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
+	  | -with-* | --with-* | -without-* | --without-* | --x)
+	    case "$ac_configure_args0 " in
+	      "$ac_configure_args1"*" '$ac_arg' "* ) continue ;;
+	    esac
+	    ;;
+	  -* ) ac_must_keep_next=true ;;
+	esac
+      fi
+      as_fn_append ac_configure_args " '$ac_arg'"
+      ;;
+    esac
+  done
+done
+{ ac_configure_args0=; unset ac_configure_args0;}
+{ ac_configure_args1=; unset ac_configure_args1;}
+
+# When interrupted or exit'd, cleanup temporary files, and complete
+# config.log.  We remove comments because anyway the quotes in there
+# would cause problems or look ugly.
+# WARNING: Use '\'' to represent an apostrophe within the trap.
+# WARNING: Do not start the trap code with a newline, due to a FreeBSD 4.0 bug.
+trap 'exit_status=$?
+  # Sanitize IFS.
+  IFS=" ""	$as_nl"
+  # Save into config.log some information that might help in debugging.
+  {
+    echo
+
+    printf "%s\n" "## ---------------- ##
+## Cache variables. ##
+## ---------------- ##"
+    echo
+    # The following way of writing the cache mishandles newlines in values,
+(
+  for ac_var in `(set) 2>&1 | sed -n '\''s/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'\''`; do
+    eval ac_val=\$$ac_var
+    case $ac_val in #(
+    *${as_nl}*)
+      case $ac_var in #(
+      *_cv_*) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
+printf "%s\n" "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
+      esac
+      case $ac_var in #(
+      _ | IFS | as_nl) ;; #(
+      BASH_ARGV | BASH_SOURCE) eval $ac_var= ;; #(
+      *) { eval $ac_var=; unset $ac_var;} ;;
+      esac ;;
+    esac
+  done
+  (set) 2>&1 |
+    case $as_nl`(ac_space='\'' '\''; set) 2>&1` in #(
+    *${as_nl}ac_space=\ *)
+      sed -n \
+	"s/'\''/'\''\\\\'\'''\''/g;
+	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\''\\2'\''/p"
+      ;; #(
+    *)
+      sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
+      ;;
+    esac |
+    sort
+)
+    echo
+
+    printf "%s\n" "## ----------------- ##
+## Output variables. ##
+## ----------------- ##"
+    echo
+    for ac_var in $ac_subst_vars
+    do
+      eval ac_val=\$$ac_var
+      case $ac_val in
+      *\'\''*) ac_val=`printf "%s\n" "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
+      esac
+      printf "%s\n" "$ac_var='\''$ac_val'\''"
+    done | sort
+    echo
+
+    if test -n "$ac_subst_files"; then
+      printf "%s\n" "## ------------------- ##
+## File substitutions. ##
+## ------------------- ##"
+      echo
+      for ac_var in $ac_subst_files
+      do
+	eval ac_val=\$$ac_var
+	case $ac_val in
+	*\'\''*) ac_val=`printf "%s\n" "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
+	esac
+	printf "%s\n" "$ac_var='\''$ac_val'\''"
+      done | sort
+      echo
+    fi
+
+    if test -s confdefs.h; then
+      printf "%s\n" "## ----------- ##
+## confdefs.h. ##
+## ----------- ##"
+      echo
+      cat confdefs.h
+      echo
+    fi
+    test "$ac_signal" != 0 &&
+      printf "%s\n" "$as_me: caught signal $ac_signal"
+    printf "%s\n" "$as_me: exit $exit_status"
+  } >&5
+  rm -f core *.core core.conftest.* &&
+    rm -f -r conftest* confdefs* conf$$* $ac_clean_files &&
+    exit $exit_status
+' 0
+for ac_signal in 1 2 13 15; do
+  trap 'ac_signal='$ac_signal'; as_fn_exit 1' $ac_signal
+done
+ac_signal=0
+
+# confdefs.h avoids OS command line length limits that DEFS can exceed.
+rm -f -r conftest* confdefs.h
+
+printf "%s\n" "/* confdefs.h */" > confdefs.h
+
+# Predefined preprocessor variables.
+
+printf "%s\n" "#define PACKAGE_NAME \"$PACKAGE_NAME\"" >>confdefs.h
+
+printf "%s\n" "#define PACKAGE_TARNAME \"$PACKAGE_TARNAME\"" >>confdefs.h
+
+printf "%s\n" "#define PACKAGE_VERSION \"$PACKAGE_VERSION\"" >>confdefs.h
+
+printf "%s\n" "#define PACKAGE_STRING \"$PACKAGE_STRING\"" >>confdefs.h
+
+printf "%s\n" "#define PACKAGE_BUGREPORT \"$PACKAGE_BUGREPORT\"" >>confdefs.h
+
+printf "%s\n" "#define PACKAGE_URL \"$PACKAGE_URL\"" >>confdefs.h
+
+
+# Let the site file select an alternate cache file if it wants to.
+# Prefer an explicitly selected file to automatically selected ones.
+if test -n "$CONFIG_SITE"; then
+  ac_site_files="$CONFIG_SITE"
+elif test "x$prefix" != xNONE; then
+  ac_site_files="$prefix/share/config.site $prefix/etc/config.site"
+else
+  ac_site_files="$ac_default_prefix/share/config.site $ac_default_prefix/etc/config.site"
+fi
+
+for ac_site_file in $ac_site_files
+do
+  case $ac_site_file in #(
+  */*) :
+     ;; #(
+  *) :
+    ac_site_file=./$ac_site_file ;;
+esac
+  if test -f "$ac_site_file" && test -r "$ac_site_file"; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: loading site script $ac_site_file" >&5
+printf "%s\n" "$as_me: loading site script $ac_site_file" >&6;}
+    sed 's/^/| /' "$ac_site_file" >&5
+    . "$ac_site_file" \
+      || { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "failed to load site script $ac_site_file
+See \`config.log' for more details" "$LINENO" 5; }
+  fi
+done
+
+if test -r "$cache_file"; then
+  # Some versions of bash will fail to source /dev/null (special files
+  # actually), so we avoid doing that.  DJGPP emulates it as a regular file.
+  if test /dev/null != "$cache_file" && test -f "$cache_file"; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: loading cache $cache_file" >&5
+printf "%s\n" "$as_me: loading cache $cache_file" >&6;}
+    case $cache_file in
+      [\\/]* | ?:[\\/]* ) . "$cache_file";;
+      *)                      . "./$cache_file";;
+    esac
+  fi
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: creating cache $cache_file" >&5
+printf "%s\n" "$as_me: creating cache $cache_file" >&6;}
+  >$cache_file
+fi
+
+# Test code for whether the C compiler supports C89 (global declarations)
+ac_c_conftest_c89_globals='
+/* Does the compiler advertise C89 conformance?
+   Do not test the value of __STDC__, because some compilers set it to 0
+   while being otherwise adequately conformant. */
+#if !defined __STDC__
+# error "Compiler does not advertise C89 conformance"
+#endif
+
+#include <stddef.h>
+#include <stdarg.h>
+struct stat;
+/* Most of the following tests are stolen from RCS 5.7 src/conf.sh.  */
+struct buf { int x; };
+struct buf * (*rcsopen) (struct buf *, struct stat *, int);
+static char *e (p, i)
+     char **p;
+     int i;
+{
+  return p[i];
+}
+static char *f (char * (*g) (char **, int), char **p, ...)
+{
+  char *s;
+  va_list v;
+  va_start (v,p);
+  s = g (p, va_arg (v,int));
+  va_end (v);
+  return s;
+}
+
+/* OSF 4.0 Compaq cc is some sort of almost-ANSI by default.  It has
+   function prototypes and stuff, but not \xHH hex character constants.
+   These do not provoke an error unfortunately, instead are silently treated
+   as an "x".  The following induces an error, until -std is added to get
+   proper ANSI mode.  Curiously \x00 != x always comes out true, for an
+   array size at least.  It is necessary to write \x00 == 0 to get something
+   that is true only with -std.  */
+int osf4_cc_array ['\''\x00'\'' == 0 ? 1 : -1];
+
+/* IBM C 6 for AIX is almost-ANSI by default, but it replaces macro parameters
+   inside strings and character constants.  */
+#define FOO(x) '\''x'\''
+int xlc6_cc_array[FOO(a) == '\''x'\'' ? 1 : -1];
+
+int test (int i, double x);
+struct s1 {int (*f) (int a);};
+struct s2 {int (*f) (double a);};
+int pairnames (int, char **, int *(*)(struct buf *, struct stat *, int),
+               int, int);'
+
+# Test code for whether the C compiler supports C89 (body of main).
+ac_c_conftest_c89_main='
+ok |= (argc == 0 || f (e, argv, 0) != argv[0] || f (e, argv, 1) != argv[1]);
+'
+
+# Test code for whether the C compiler supports C99 (global declarations)
+ac_c_conftest_c99_globals='
+// Does the compiler advertise C99 conformance?
+#if !defined __STDC_VERSION__ || __STDC_VERSION__ < 199901L
+# error "Compiler does not advertise C99 conformance"
+#endif
+
+#include <stdbool.h>
+extern int puts (const char *);
+extern int printf (const char *, ...);
+extern int dprintf (int, const char *, ...);
+extern void *malloc (size_t);
+
+// Check varargs macros.  These examples are taken from C99 6.10.3.5.
+// dprintf is used instead of fprintf to avoid needing to declare
+// FILE and stderr.
+#define debug(...) dprintf (2, __VA_ARGS__)
+#define showlist(...) puts (#__VA_ARGS__)
+#define report(test,...) ((test) ? puts (#test) : printf (__VA_ARGS__))
+static void
+test_varargs_macros (void)
+{
+  int x = 1234;
+  int y = 5678;
+  debug ("Flag");
+  debug ("X = %d\n", x);
+  showlist (The first, second, and third items.);
+  report (x>y, "x is %d but y is %d", x, y);
+}
+
+// Check long long types.
+#define BIG64 18446744073709551615ull
+#define BIG32 4294967295ul
+#define BIG_OK (BIG64 / BIG32 == 4294967297ull && BIG64 % BIG32 == 0)
+#if !BIG_OK
+  #error "your preprocessor is broken"
+#endif
+#if BIG_OK
+#else
+  #error "your preprocessor is broken"
+#endif
+static long long int bignum = -9223372036854775807LL;
+static unsigned long long int ubignum = BIG64;
+
+struct incomplete_array
+{
+  int datasize;
+  double data[];
+};
+
+struct named_init {
+  int number;
+  const wchar_t *name;
+  double average;
+};
+
+typedef const char *ccp;
+
+static inline int
+test_restrict (ccp restrict text)
+{
+  // See if C++-style comments work.
+  // Iterate through items via the restricted pointer.
+  // Also check for declarations in for loops.
+  for (unsigned int i = 0; *(text+i) != '\''\0'\''; ++i)
+    continue;
+  return 0;
+}
+
+// Check varargs and va_copy.
+static bool
+test_varargs (const char *format, ...)
+{
+  va_list args;
+  va_start (args, format);
+  va_list args_copy;
+  va_copy (args_copy, args);
+
+  const char *str = "";
+  int number = 0;
+  float fnumber = 0;
+
+  while (*format)
+    {
+      switch (*format++)
+	{
+	case '\''s'\'': // string
+	  str = va_arg (args_copy, const char *);
+	  break;
+	case '\''d'\'': // int
+	  number = va_arg (args_copy, int);
+	  break;
+	case '\''f'\'': // float
+	  fnumber = va_arg (args_copy, double);
+	  break;
+	default:
+	  break;
+	}
+    }
+  va_end (args_copy);
+  va_end (args);
+
+  return *str && number && fnumber;
+}
+'
+
+# Test code for whether the C compiler supports C99 (body of main).
+ac_c_conftest_c99_main='
+  // Check bool.
+  _Bool success = false;
+  success |= (argc != 0);
+
+  // Check restrict.
+  if (test_restrict ("String literal") == 0)
+    success = true;
+  char *restrict newvar = "Another string";
+
+  // Check varargs.
+  success &= test_varargs ("s, d'\'' f .", "string", 65, 34.234);
+  test_varargs_macros ();
+
+  // Check flexible array members.
+  struct incomplete_array *ia =
+    malloc (sizeof (struct incomplete_array) + (sizeof (double) * 10));
+  ia->datasize = 10;
+  for (int i = 0; i < ia->datasize; ++i)
+    ia->data[i] = i * 1.234;
+
+  // Check named initializers.
+  struct named_init ni = {
+    .number = 34,
+    .name = L"Test wide string",
+    .average = 543.34343,
+  };
+
+  ni.number = 58;
+
+  int dynamic_array[ni.number];
+  dynamic_array[0] = argv[0][0];
+  dynamic_array[ni.number - 1] = 543;
+
+  // work around unused variable warnings
+  ok |= (!success || bignum == 0LL || ubignum == 0uLL || newvar[0] == '\''x'\''
+	 || dynamic_array[ni.number - 1] != 543);
+'
+
+# Test code for whether the C compiler supports C11 (global declarations)
+ac_c_conftest_c11_globals='
+// Does the compiler advertise C11 conformance?
+#if !defined __STDC_VERSION__ || __STDC_VERSION__ < 201112L
+# error "Compiler does not advertise C11 conformance"
+#endif
+
+// Check _Alignas.
+char _Alignas (double) aligned_as_double;
+char _Alignas (0) no_special_alignment;
+extern char aligned_as_int;
+char _Alignas (0) _Alignas (int) aligned_as_int;
+
+// Check _Alignof.
+enum
+{
+  int_alignment = _Alignof (int),
+  int_array_alignment = _Alignof (int[100]),
+  char_alignment = _Alignof (char)
+};
+_Static_assert (0 < -_Alignof (int), "_Alignof is signed");
+
+// Check _Noreturn.
+int _Noreturn does_not_return (void) { for (;;) continue; }
+
+// Check _Static_assert.
+struct test_static_assert
+{
+  int x;
+  _Static_assert (sizeof (int) <= sizeof (long int),
+                  "_Static_assert does not work in struct");
+  long int y;
+};
+
+// Check UTF-8 literals.
+#define u8 syntax error!
+char const utf8_literal[] = u8"happens to be ASCII" "another string";
+
+// Check duplicate typedefs.
+typedef long *long_ptr;
+typedef long int *long_ptr;
+typedef long_ptr long_ptr;
+
+// Anonymous structures and unions -- taken from C11 6.7.2.1 Example 1.
+struct anonymous
+{
+  union {
+    struct { int i; int j; };
+    struct { int k; long int l; } w;
+  };
+  int m;
+} v1;
+'
+
+# Test code for whether the C compiler supports C11 (body of main).
+ac_c_conftest_c11_main='
+  _Static_assert ((offsetof (struct anonymous, i)
+		   == offsetof (struct anonymous, w.k)),
+		  "Anonymous union alignment botch");
+  v1.i = 2;
+  v1.w.k = 5;
+  ok |= v1.i != 5;
+'
+
+# Test code for whether the C compiler supports C11 (complete).
+ac_c_conftest_c11_program="${ac_c_conftest_c89_globals}
+${ac_c_conftest_c99_globals}
+${ac_c_conftest_c11_globals}
+
+int
+main (int argc, char **argv)
+{
+  int ok = 0;
+  ${ac_c_conftest_c89_main}
+  ${ac_c_conftest_c99_main}
+  ${ac_c_conftest_c11_main}
+  return ok;
+}
+"
+
+# Test code for whether the C compiler supports C99 (complete).
+ac_c_conftest_c99_program="${ac_c_conftest_c89_globals}
+${ac_c_conftest_c99_globals}
+
+int
+main (int argc, char **argv)
+{
+  int ok = 0;
+  ${ac_c_conftest_c89_main}
+  ${ac_c_conftest_c99_main}
+  return ok;
+}
+"
+
+# Test code for whether the C compiler supports C89 (complete).
+ac_c_conftest_c89_program="${ac_c_conftest_c89_globals}
+
+int
+main (int argc, char **argv)
+{
+  int ok = 0;
+  ${ac_c_conftest_c89_main}
+  return ok;
+}
+"
+
+as_fn_append ac_header_c_list " stdio.h stdio_h HAVE_STDIO_H"
+as_fn_append ac_header_c_list " stdlib.h stdlib_h HAVE_STDLIB_H"
+as_fn_append ac_header_c_list " string.h string_h HAVE_STRING_H"
+as_fn_append ac_header_c_list " inttypes.h inttypes_h HAVE_INTTYPES_H"
+as_fn_append ac_header_c_list " stdint.h stdint_h HAVE_STDINT_H"
+as_fn_append ac_header_c_list " strings.h strings_h HAVE_STRINGS_H"
+as_fn_append ac_header_c_list " sys/stat.h sys_stat_h HAVE_SYS_STAT_H"
+as_fn_append ac_header_c_list " sys/types.h sys_types_h HAVE_SYS_TYPES_H"
+as_fn_append ac_header_c_list " unistd.h unistd_h HAVE_UNISTD_H"
+as_fn_append ac_header_c_list " wchar.h wchar_h HAVE_WCHAR_H"
+as_fn_append ac_header_c_list " minix/config.h minix_config_h HAVE_MINIX_CONFIG_H"
+as_fn_append ac_func_c_list " btowc HAVE_BTOWC"
+as_fn_append ac_header_c_list " sys/param.h sys_param_h HAVE_SYS_PARAM_H"
+as_fn_append ac_func_c_list " _set_invalid_parameter_handler HAVE__SET_INVALID_PARAMETER_HANDLER"
+as_fn_append ac_header_c_list " sys/socket.h sys_socket_h HAVE_SYS_SOCKET_H"
+as_fn_append ac_func_c_list " fchdir HAVE_FCHDIR"
+as_fn_append ac_header_c_list " dirent.h dirent_h HAVE_DIRENT_H"
+as_fn_append ac_func_c_list " fcntl HAVE_FCNTL"
+as_fn_append ac_func_c_list " symlink HAVE_SYMLINK"
+as_fn_append ac_func_c_list " fdopendir HAVE_FDOPENDIR"
+as_fn_append ac_func_c_list " mempcpy HAVE_MEMPCPY"
+as_fn_append ac_header_c_list " fnmatch.h fnmatch_h HAVE_FNMATCH_H"
+as_fn_append ac_func_c_list " fnmatch HAVE_FNMATCH"
+as_fn_append ac_func_c_list " mbsrtowcs HAVE_MBSRTOWCS"
+as_fn_append ac_header_c_list " stdio_ext.h stdio_ext_h HAVE_STDIO_EXT_H"
+as_fn_append ac_func_c_list " fstatat HAVE_FSTATAT"
+as_fn_append ac_func_c_list " openat HAVE_OPENAT"
+as_fn_append ac_func_c_list " fstatfs HAVE_FSTATFS"
+as_fn_append ac_header_c_list " sys/vfs.h sys_vfs_h HAVE_SYS_VFS_H"
+as_fn_append ac_func_c_list " getdtablesize HAVE_GETDTABLESIZE"
+gl_getopt_required=GNU
+as_fn_append ac_header_c_list " getopt.h getopt_h HAVE_GETOPT_H"
+as_fn_append ac_header_c_list " sys/cdefs.h sys_cdefs_h HAVE_SYS_CDEFS_H"
+as_fn_append ac_func_c_list " getprogname HAVE_GETPROGNAME"
+as_fn_append ac_func_c_list " getexecname HAVE_GETEXECNAME"
+as_fn_append ac_header_c_list " threads.h threads_h HAVE_THREADS_H"
+as_fn_append ac_header_c_list " iconv.h iconv_h HAVE_ICONV_H"
+as_fn_append ac_header_c_list " limits.h limits_h HAVE_LIMITS_H"
+as_fn_append ac_func_c_list " isblank HAVE_ISBLANK"
+as_fn_append ac_func_c_list " iswcntrl HAVE_ISWCNTRL"
+as_fn_append ac_header_c_list " crtdefs.h crtdefs_h HAVE_CRTDEFS_H"
+as_fn_append ac_header_c_list " wctype.h wctype_h HAVE_WCTYPE_H"
+as_fn_append ac_func_c_list " iswblank HAVE_ISWBLANK"
+as_fn_append ac_header_c_list " langinfo.h langinfo_h HAVE_LANGINFO_H"
+as_fn_append ac_header_c_list " xlocale.h xlocale_h HAVE_XLOCALE_H"
+as_fn_append ac_func_c_list " lstat HAVE_LSTAT"
+as_fn_append ac_func_c_list " mbsinit HAVE_MBSINIT"
+as_fn_append ac_func_c_list " mbrtowc HAVE_MBRTOWC"
+as_fn_append ac_func_c_list " mbrlen HAVE_MBRLEN"
+as_fn_append ac_func_c_list " mbslen HAVE_MBSLEN"
+as_fn_append ac_header_c_list " sys/mman.h sys_mman_h HAVE_SYS_MMAN_H"
+as_fn_append ac_func_c_list " mprotect HAVE_MPROTECT"
+as_fn_append ac_func_c_list " nl_langinfo HAVE_NL_LANGINFO"
+as_fn_append ac_func_c_list " pipe HAVE_PIPE"
+as_fn_append ac_header_c_list " malloc.h malloc_h HAVE_MALLOC_H"
+as_fn_append ac_func_c_list " iswctype HAVE_ISWCTYPE"
+as_fn_append ac_func_c_list " sigaltstack HAVE_SIGALTSTACK"
+as_fn_append ac_func_c_list " setrlimit HAVE_SETRLIMIT"
+as_fn_append ac_func_c_list " getrlimit HAVE_GETRLIMIT"
+as_fn_append ac_header_c_list " sys/time.h sys_time_h HAVE_SYS_TIME_H"
+as_fn_append ac_func_c_list " strerror_r HAVE_STRERROR_R"
+as_fn_append ac_func_c_list " __xpg_strerror_r HAVE___XPG_STRERROR_R"
+as_fn_append ac_func_c_list " strtoimax HAVE_STRTOIMAX"
+as_fn_append ac_func_c_list " strtoumax HAVE_STRTOUMAX"
+as_fn_append ac_header_c_list " features.h features_h HAVE_FEATURES_H"
+as_fn_append ac_func_c_list " wcrtomb HAVE_WCRTOMB"
+as_fn_append ac_func_c_list " wctob HAVE_WCTOB"
+as_fn_append ac_func_c_list " wcwidth HAVE_WCWIDTH"
+as_fn_append ac_func_c_list " wmempcpy HAVE_WMEMPCPY"
+as_fn_append ac_header_c_list " arpa/inet.h arpa_inet_h HAVE_ARPA_INET_H"
+as_fn_append ac_func_c_list " ftruncate HAVE_FTRUNCATE"
+as_fn_append ac_func_c_list " gettimeofday HAVE_GETTIMEOFDAY"
+as_fn_append ac_func_c_list " duplocale HAVE_DUPLOCALE"
+as_fn_append ac_header_c_list " netdb.h netdb_h HAVE_NETDB_H"
+as_fn_append ac_header_c_list " netinet/in.h netinet_in_h HAVE_NETINET_IN_H"
+as_fn_append ac_func_c_list " newlocale HAVE_NEWLOCALE"
+as_fn_append ac_func_c_list " uselocale HAVE_USELOCALE"
+as_fn_append ac_func_c_list " freelocale HAVE_FREELOCALE"
+as_fn_append ac_header_c_list " sys/select.h sys_select_h HAVE_SYS_SELECT_H"
+as_fn_append ac_header_c_list " pthread.h pthread_h HAVE_PTHREAD_H"
+as_fn_append ac_func_c_list " pthread_sigmask HAVE_PTHREAD_SIGMASK"
+as_fn_append ac_header_c_list " sys/wait.h sys_wait_h HAVE_SYS_WAIT_H"
+as_fn_append ac_func_c_list " setenv HAVE_SETENV"
+as_fn_append ac_func_c_list " sigaction HAVE_SIGACTION"
+as_fn_append ac_func_c_list " siginterrupt HAVE_SIGINTERRUPT"
+as_fn_append ac_func_c_list " sleep HAVE_SLEEP"
+as_fn_append ac_func_c_list " snprintf HAVE_SNPRINTF"
+as_fn_append ac_func_c_list " catgets HAVE_CATGETS"
+as_fn_append ac_header_c_list " sys/ioctl.h sys_ioctl_h HAVE_SYS_IOCTL_H"
+as_fn_append ac_func_c_list " shutdown HAVE_SHUTDOWN"
+as_fn_append ac_header_c_list " sys/uio.h sys_uio_h HAVE_SYS_UIO_H"
+as_fn_append ac_func_c_list " vasnprintf HAVE_VASNPRINTF"
+as_fn_append ac_func_c_list " isascii HAVE_ISASCII"
+as_fn_append ac_func_c_list " setlocale HAVE_SETLOCALE"
+gt_needs="$gt_needs "
+
+# Auxiliary files required by this configure script.
+ac_aux_files="config.rpath compile config.guess config.sub missing install-sh"
+
+# Locations in which to look for auxiliary files.
+ac_aux_dir_candidates="${srcdir}/build-aux"
+
+# Search for a directory containing all of the required auxiliary files,
+# $ac_aux_files, from the $PATH-style list $ac_aux_dir_candidates.
+# If we don't find one directory that contains all the files we need,
+# we report the set of missing files from the *first* directory in
+# $ac_aux_dir_candidates and give up.
+ac_missing_aux_files=""
+ac_first_candidate=:
+printf "%s\n" "$as_me:${as_lineno-$LINENO}: looking for aux files: $ac_aux_files" >&5
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+as_found=false
+for as_dir in $ac_aux_dir_candidates
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+  as_found=:
+
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}:  trying $as_dir" >&5
+  ac_aux_dir_found=yes
+  ac_install_sh=
+  for ac_aux in $ac_aux_files
+  do
+    # As a special case, if "install-sh" is required, that requirement
+    # can be satisfied by any of "install-sh", "install.sh", or "shtool",
+    # and $ac_install_sh is set appropriately for whichever one is found.
+    if test x"$ac_aux" = x"install-sh"
+    then
+      if test -f "${as_dir}install-sh"; then
+        printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}install-sh found" >&5
+        ac_install_sh="${as_dir}install-sh -c"
+      elif test -f "${as_dir}install.sh"; then
+        printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}install.sh found" >&5
+        ac_install_sh="${as_dir}install.sh -c"
+      elif test -f "${as_dir}shtool"; then
+        printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}shtool found" >&5
+        ac_install_sh="${as_dir}shtool install -c"
+      else
+        ac_aux_dir_found=no
+        if $ac_first_candidate; then
+          ac_missing_aux_files="${ac_missing_aux_files} install-sh"
+        else
+          break
+        fi
+      fi
+    else
+      if test -f "${as_dir}${ac_aux}"; then
+        printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}${ac_aux} found" >&5
+      else
+        ac_aux_dir_found=no
+        if $ac_first_candidate; then
+          ac_missing_aux_files="${ac_missing_aux_files} ${ac_aux}"
+        else
+          break
+        fi
+      fi
+    fi
+  done
+  if test "$ac_aux_dir_found" = yes; then
+    ac_aux_dir="$as_dir"
+    break
+  fi
+  ac_first_candidate=false
+
+  as_found=false
+done
+IFS=$as_save_IFS
+if $as_found
+then :
+
+else $as_nop
+  as_fn_error $? "cannot find required auxiliary files:$ac_missing_aux_files" "$LINENO" 5
+fi
+
+
+# These three variables are undocumented and unsupported,
+# and are intended to be withdrawn in a future Autoconf release.
+# They can cause serious problems if a builder's source tree is in a directory
+# whose full name contains unusual characters.
+if test -f "${ac_aux_dir}config.guess"; then
+  ac_config_guess="$SHELL ${ac_aux_dir}config.guess"
+fi
+if test -f "${ac_aux_dir}config.sub"; then
+  ac_config_sub="$SHELL ${ac_aux_dir}config.sub"
+fi
+if test -f "$ac_aux_dir/configure"; then
+  ac_configure="$SHELL ${ac_aux_dir}configure"
+fi
+
+# Check that the precious variables saved in the cache have kept the same
+# value.
+ac_cache_corrupted=false
+for ac_var in $ac_precious_vars; do
+  eval ac_old_set=\$ac_cv_env_${ac_var}_set
+  eval ac_new_set=\$ac_env_${ac_var}_set
+  eval ac_old_val=\$ac_cv_env_${ac_var}_value
+  eval ac_new_val=\$ac_env_${ac_var}_value
+  case $ac_old_set,$ac_new_set in
+    set,)
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&5
+printf "%s\n" "$as_me: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&2;}
+      ac_cache_corrupted=: ;;
+    ,set)
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was not set in the previous run" >&5
+printf "%s\n" "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
+      ac_cache_corrupted=: ;;
+    ,);;
+    *)
+      if test "x$ac_old_val" != "x$ac_new_val"; then
+	# differences in whitespace do not lead to failure.
+	ac_old_val_w=`echo x $ac_old_val`
+	ac_new_val_w=`echo x $ac_new_val`
+	if test "$ac_old_val_w" != "$ac_new_val_w"; then
+	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' has changed since the previous run:" >&5
+printf "%s\n" "$as_me: error: \`$ac_var' has changed since the previous run:" >&2;}
+	  ac_cache_corrupted=:
+	else
+	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&5
+printf "%s\n" "$as_me: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&2;}
+	  eval $ac_var=\$ac_old_val
+	fi
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   former value:  \`$ac_old_val'" >&5
+printf "%s\n" "$as_me:   former value:  \`$ac_old_val'" >&2;}
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   current value: \`$ac_new_val'" >&5
+printf "%s\n" "$as_me:   current value: \`$ac_new_val'" >&2;}
+      fi;;
+  esac
+  # Pass precious variables to config.status.
+  if test "$ac_new_set" = set; then
+    case $ac_new_val in
+    *\'*) ac_arg=$ac_var=`printf "%s\n" "$ac_new_val" | sed "s/'/'\\\\\\\\''/g"` ;;
+    *) ac_arg=$ac_var=$ac_new_val ;;
+    esac
+    case " $ac_configure_args " in
+      *" '$ac_arg' "*) ;; # Avoid dups.  Use of quotes ensures accuracy.
+      *) as_fn_append ac_configure_args " '$ac_arg'" ;;
+    esac
+  fi
+done
+if $ac_cache_corrupted; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: changes in the environment can compromise the build" >&5
+printf "%s\n" "$as_me: error: changes in the environment can compromise the build" >&2;}
+  as_fn_error $? "run \`${MAKE-make} distclean' and/or \`rm $cache_file'
+	    and start over" "$LINENO" 5
+fi
+## -------------------- ##
+## Main body of script. ##
+## -------------------- ##
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
+if test -n "$GREP" || test -n "$EGREP"; then
+  as_fn_error $? "no working 'grep' found
+  A working 'grep' command is needed to build GNU Grep.
+  This 'grep' should support -e and long lines.
+  On Solaris 10, install the package SUNWggrp or SUNWxcu4.
+  On Solaris 11, install the package text/gnu-grep or system/xopen/xcu4." "$LINENO" 5
+fi
+
+
+
+
+printf "%s\n" "#define GREP 1" >>confdefs.h
+
+
+
+
+am__api_version='1.16'
+
+
+
+  # Find a good install program.  We prefer a C program (faster),
+# so one script is as good as another.  But avoid the broken or
+# incompatible versions:
+# SysV /etc/install, /usr/sbin/install
+# SunOS /usr/etc/install
+# IRIX /sbin/install
+# AIX /bin/install
+# AmigaOS /C/install, which installs bootblocks on floppy discs
+# AIX 4 /usr/bin/installbsd, which doesn't work without a -g flag
+# AFS /usr/afsws/bin/install, which mishandles nonexistent args
+# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
+# OS/2's system install, which has a completely different semantic
+# ./install, which can be erroneously created by make from ./install.sh.
+# Reject install programs that cannot install multiple files.
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a BSD-compatible install" >&5
+printf %s "checking for a BSD-compatible install... " >&6; }
+if test -z "$INSTALL"; then
+if test ${ac_cv_path_install+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    # Account for fact that we put trailing slashes in our PATH walk.
+case $as_dir in #((
+  ./ | /[cC]/* | \
+  /etc/* | /usr/sbin/* | /usr/etc/* | /sbin/* | /usr/afsws/bin/* | \
+  ?:[\\/]os2[\\/]install[\\/]* | ?:[\\/]OS2[\\/]INSTALL[\\/]* | \
+  /usr/ucb/* ) ;;
+  *)
+    # OSF1 and SCO ODT 3.0 have their own names for install.
+    # Don't use installbsd from OSF since it installs stuff as root
+    # by default.
+    for ac_prog in ginstall scoinst install; do
+      for ac_exec_ext in '' $ac_executable_extensions; do
+	if as_fn_executable_p "$as_dir$ac_prog$ac_exec_ext"; then
+	  if test $ac_prog = install &&
+	    grep dspmsg "$as_dir$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+	    # AIX install.  It has an incompatible calling convention.
+	    :
+	  elif test $ac_prog = install &&
+	    grep pwplus "$as_dir$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+	    # program-specific install script used by HP pwplus--don't use.
+	    :
+	  else
+	    rm -rf conftest.one conftest.two conftest.dir
+	    echo one > conftest.one
+	    echo two > conftest.two
+	    mkdir conftest.dir
+	    if "$as_dir$ac_prog$ac_exec_ext" -c conftest.one conftest.two "`pwd`/conftest.dir/" &&
+	      test -s conftest.one && test -s conftest.two &&
+	      test -s conftest.dir/conftest.one &&
+	      test -s conftest.dir/conftest.two
+	    then
+	      ac_cv_path_install="$as_dir$ac_prog$ac_exec_ext -c"
+	      break 3
+	    fi
+	  fi
+	fi
+      done
+    done
+    ;;
+esac
+
+  done
+IFS=$as_save_IFS
+
+rm -rf conftest.one conftest.two conftest.dir
+
+fi
+  if test ${ac_cv_path_install+y}; then
+    INSTALL=$ac_cv_path_install
+  else
+    # As a last resort, use the slow shell script.  Don't cache a
+    # value for INSTALL within a source directory, because that will
+    # break other packages using the cache if that directory is
+    # removed, or if the value is a relative name.
+    INSTALL=$ac_install_sh
+  fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $INSTALL" >&5
+printf "%s\n" "$INSTALL" >&6; }
+
+# Use test -z because SunOS4 sh mishandles braces in ${var-val}.
+# It thinks the first close brace ends the variable substitution.
+test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
+
+test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL}'
+
+test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether build environment is sane" >&5
+printf %s "checking whether build environment is sane... " >&6; }
+# Reject unsafe characters in $srcdir or the absolute working directory
+# name.  Accept space and tab only in the latter.
+am_lf='
+'
+case `pwd` in
+  *[\\\"\#\$\&\'\`$am_lf]*)
+    as_fn_error $? "unsafe absolute working directory name" "$LINENO" 5;;
+esac
+case $srcdir in
+  *[\\\"\#\$\&\'\`$am_lf\ \	]*)
+    as_fn_error $? "unsafe srcdir value: '$srcdir'" "$LINENO" 5;;
+esac
+
+# Do 'set' in a subshell so we don't clobber the current shell's
+# arguments.  Must try -L first in case configure is actually a
+# symlink; some systems play weird games with the mod time of symlinks
+# (eg FreeBSD returns the mod time of the symlink's containing
+# directory).
+if (
+   am_has_slept=no
+   for am_try in 1 2; do
+     echo "timestamp, slept: $am_has_slept" > conftest.file
+     set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
+     if test "$*" = "X"; then
+	# -L didn't work.
+	set X `ls -t "$srcdir/configure" conftest.file`
+     fi
+     if test "$*" != "X $srcdir/configure conftest.file" \
+	&& test "$*" != "X conftest.file $srcdir/configure"; then
+
+	# If neither matched, then we have a broken ls.  This can happen
+	# if, for instance, CONFIG_SHELL is bash and it inherits a
+	# broken ls alias from the environment.  This has actually
+	# happened.  Such a system could not be considered "sane".
+	as_fn_error $? "ls -t appears to fail.  Make sure there is not a broken
+  alias in your environment" "$LINENO" 5
+     fi
+     if test "$2" = conftest.file || test $am_try -eq 2; then
+       break
+     fi
+     # Just in case.
+     sleep 1
+     am_has_slept=yes
+   done
+   test "$2" = conftest.file
+   )
+then
+   # Ok.
+   :
+else
+   as_fn_error $? "newly created file is older than distributed files!
+Check your system clock" "$LINENO" 5
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+# If we didn't sleep, we still need to ensure time stamps of config.status and
+# generated files are strictly newer.
+am_sleep_pid=
+if grep 'slept: no' conftest.file >/dev/null 2>&1; then
+  ( sleep 1 ) &
+  am_sleep_pid=$!
+fi
+
+rm -f conftest.file
+
+test "$program_prefix" != NONE &&
+  program_transform_name="s&^&$program_prefix&;$program_transform_name"
+# Use a double $ so make ignores it.
+test "$program_suffix" != NONE &&
+  program_transform_name="s&\$&$program_suffix&;$program_transform_name"
+# Double any \ or $.
+# By default was `s,x,x', remove it if useless.
+ac_script='s/[\\$]/&&/g;s/;s,x,x,$//'
+program_transform_name=`printf "%s\n" "$program_transform_name" | sed "$ac_script"`
+
+
+# Expand $ac_aux_dir to an absolute path.
+am_aux_dir=`cd "$ac_aux_dir" && pwd`
+
+
+  if test x"${MISSING+set}" != xset; then
+  MISSING="\${SHELL} '$am_aux_dir/missing'"
+fi
+# Use eval to expand $SHELL
+if eval "$MISSING --is-lightweight"; then
+  am_missing_run="$MISSING "
+else
+  am_missing_run=
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: 'missing' script is too old or missing" >&5
+printf "%s\n" "$as_me: WARNING: 'missing' script is too old or missing" >&2;}
+fi
+
+if test x"${install_sh+set}" != xset; then
+  case $am_aux_dir in
+  *\ * | *\	*)
+    install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;;
+  *)
+    install_sh="\${SHELL} $am_aux_dir/install-sh"
+  esac
+fi
+
+# Installed binaries are usually stripped using 'strip' when the user
+# run "make install-strip".  However 'strip' might not be the right
+# tool to use in cross-compilation environments, therefore Automake
+# will honor the 'STRIP' environment variable to overrule this program.
+if test "$cross_compiling" != no; then
+  if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args.
+set dummy ${ac_tool_prefix}strip; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_STRIP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$STRIP"; then
+  ac_cv_prog_STRIP="$STRIP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_STRIP="${ac_tool_prefix}strip"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+STRIP=$ac_cv_prog_STRIP
+if test -n "$STRIP"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
+printf "%s\n" "$STRIP" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_STRIP"; then
+  ac_ct_STRIP=$STRIP
+  # Extract the first word of "strip", so it can be a program name with args.
+set dummy strip; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_STRIP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$ac_ct_STRIP"; then
+  ac_cv_prog_ac_ct_STRIP="$ac_ct_STRIP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_STRIP="strip"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP
+if test -n "$ac_ct_STRIP"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5
+printf "%s\n" "$ac_ct_STRIP" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+  if test "x$ac_ct_STRIP" = x; then
+    STRIP=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    STRIP=$ac_ct_STRIP
+  fi
+else
+  STRIP="$ac_cv_prog_STRIP"
+fi
+
+fi
+INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a race-free mkdir -p" >&5
+printf %s "checking for a race-free mkdir -p... " >&6; }
+if test -z "$MKDIR_P"; then
+  if test ${ac_cv_path_mkdir+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/opt/sfw/bin
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_prog in mkdir gmkdir; do
+	 for ac_exec_ext in '' $ac_executable_extensions; do
+	   as_fn_executable_p "$as_dir$ac_prog$ac_exec_ext" || continue
+	   case `"$as_dir$ac_prog$ac_exec_ext" --version 2>&1` in #(
+	     'mkdir ('*'coreutils) '* | \
+	     'BusyBox '* | \
+	     'mkdir (fileutils) '4.1*)
+	       ac_cv_path_mkdir=$as_dir$ac_prog$ac_exec_ext
+	       break 3;;
+	   esac
+	 done
+       done
+  done
+IFS=$as_save_IFS
+
+fi
+
+  test -d ./--version && rmdir ./--version
+  if test ${ac_cv_path_mkdir+y}; then
+    MKDIR_P="$ac_cv_path_mkdir -p"
+  else
+    # As a last resort, use the slow shell script.  Don't cache a
+    # value for MKDIR_P within a source directory, because that will
+    # break other packages using the cache if that directory is
+    # removed, or if the value is a relative name.
+    MKDIR_P="$ac_install_sh -d"
+  fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $MKDIR_P" >&5
+printf "%s\n" "$MKDIR_P" >&6; }
+
+for ac_prog in gawk mawk nawk awk
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_AWK+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$AWK"; then
+  ac_cv_prog_AWK="$AWK" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_AWK="$ac_prog"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+AWK=$ac_cv_prog_AWK
+if test -n "$AWK"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
+printf "%s\n" "$AWK" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+  test -n "$AWK" && break
+done
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether ${MAKE-make} sets \$(MAKE)" >&5
+printf %s "checking whether ${MAKE-make} sets \$(MAKE)... " >&6; }
+set x ${MAKE-make}
+ac_make=`printf "%s\n" "$2" | sed 's/+/p/g; s/[^a-zA-Z0-9_]/_/g'`
+if eval test \${ac_cv_prog_make_${ac_make}_set+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat >conftest.make <<\_ACEOF
+SHELL = /bin/sh
+all:
+	@echo '@@@%%%=$(MAKE)=@@@%%%'
+_ACEOF
+# GNU make sometimes prints "make[1]: Entering ...", which would confuse us.
+case `${MAKE-make} -f conftest.make 2>/dev/null` in
+  *@@@%%%=?*=@@@%%%*)
+    eval ac_cv_prog_make_${ac_make}_set=yes;;
+  *)
+    eval ac_cv_prog_make_${ac_make}_set=no;;
+esac
+rm -f conftest.make
+fi
+if eval test \$ac_cv_prog_make_${ac_make}_set = yes; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+  SET_MAKE=
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+  SET_MAKE="MAKE=${MAKE-make}"
+fi
+
+rm -rf .tst 2>/dev/null
+mkdir .tst 2>/dev/null
+if test -d .tst; then
+  am__leading_dot=.
+else
+  am__leading_dot=_
+fi
+rmdir .tst 2>/dev/null
+
+# Check whether --enable-silent-rules was given.
+if test ${enable_silent_rules+y}
+then :
+  enableval=$enable_silent_rules;
+fi
+
+case $enable_silent_rules in # (((
+  yes) AM_DEFAULT_VERBOSITY=0;;
+   no) AM_DEFAULT_VERBOSITY=1;;
+    *) AM_DEFAULT_VERBOSITY=1;;
+esac
+am_make=${MAKE-make}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $am_make supports nested variables" >&5
+printf %s "checking whether $am_make supports nested variables... " >&6; }
+if test ${am_cv_make_support_nested_variables+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if printf "%s\n" 'TRUE=$(BAR$(V))
+BAR0=false
+BAR1=true
+V=1
+am__doit:
+	@$(TRUE)
+.PHONY: am__doit' | $am_make -f - >/dev/null 2>&1; then
+  am_cv_make_support_nested_variables=yes
+else
+  am_cv_make_support_nested_variables=no
+fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_make_support_nested_variables" >&5
+printf "%s\n" "$am_cv_make_support_nested_variables" >&6; }
+if test $am_cv_make_support_nested_variables = yes; then
+    AM_V='$(V)'
+  AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
+else
+  AM_V=$AM_DEFAULT_VERBOSITY
+  AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
+fi
+AM_BACKSLASH='\'
+
+if test "`cd $srcdir && pwd`" != "`pwd`"; then
+  # Use -I$(srcdir) only when $(srcdir) != ., so that make's output
+  # is not polluted with repeated "-I."
+  am__isrc=' -I$(srcdir)'
+  # test to see if srcdir already configured
+  if test -f $srcdir/config.status; then
+    as_fn_error $? "source directory already configured; run \"make distclean\" there first" "$LINENO" 5
+  fi
+fi
+
+# test whether we have cygpath
+if test -z "$CYGPATH_W"; then
+  if (cygpath --version) >/dev/null 2>/dev/null; then
+    CYGPATH_W='cygpath -w'
+  else
+    CYGPATH_W=echo
+  fi
+fi
+
+
+# Define the identity of the package.
+ PACKAGE='grep'
+ VERSION='3.7'
+
+
+printf "%s\n" "#define PACKAGE \"$PACKAGE\"" >>confdefs.h
+
+
+printf "%s\n" "#define VERSION \"$VERSION\"" >>confdefs.h
+
+# Some tools Automake needs.
+
+ACLOCAL=${ACLOCAL-"${am_missing_run}aclocal-${am__api_version}"}
+
+
+AUTOCONF=${AUTOCONF-"${am_missing_run}autoconf"}
+
+
+AUTOMAKE=${AUTOMAKE-"${am_missing_run}automake-${am__api_version}"}
+
+
+AUTOHEADER=${AUTOHEADER-"${am_missing_run}autoheader"}
+
+
+MAKEINFO=${MAKEINFO-"${am_missing_run}makeinfo"}
+
+# For better backward compatibility.  To be removed once Automake 1.9.x
+# dies out for good.  For more background, see:
+# <https://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
+# <https://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
+mkdir_p='$(MKDIR_P)'
+
+# We need awk for the "check" target (and possibly the TAP driver).  The
+# system "awk" is bad on some platforms.
+# Always define AMTAR for backward compatibility.  Yes, it's still used
+# in the wild :-(  We should find a proper way to deprecate it ...
+AMTAR='$${TAR-tar}'
+
+
+# We'll loop over all known methods to create a tar archive until one works.
+_am_tools='gnutar  pax cpio none'
+
+am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'
+
+
+
+
+
+# Variables for tags utilities; see am/tags.am
+if test -z "$CTAGS"; then
+  CTAGS=ctags
+fi
+
+if test -z "$ETAGS"; then
+  ETAGS=etags
+fi
+
+if test -z "$CSCOPE"; then
+  CSCOPE=cscope
+fi
+
+
+
+# POSIX will say in a future version that running "rm -f" with no argument
+# is OK; and we want to be able to make that assumption in our Makefile
+# recipes.  So use an aggressive probe to check that the usage we want is
+# actually supported "in the wild" to an acceptable degree.
+# See automake bug#10828.
+# To make any issue more visible, cause the running configure to be aborted
+# by default if the 'rm' program in use doesn't match our expectations; the
+# user can still override this though.
+if rm -f && rm -fr && rm -rf; then : OK; else
+  cat >&2 <<'END'
+Oops!
+
+Your 'rm' program seems unable to run without file operands specified
+on the command line, even when the '-f' option is present.  This is contrary
+to the behaviour of most rm programs out there, and not conforming with
+the upcoming POSIX standard: <http://austingroupbugs.net/view.php?id=542>
+
+Please tell bug-automake@gnu.org about your system, including the value
+of your $PATH and any error possibly output before this message.  This
+can help us improve future automake versions.
+
+END
+  if test x"$ACCEPT_INFERIOR_RM_PROGRAM" = x"yes"; then
+    echo 'Configuration will proceed anyway, since you have set the' >&2
+    echo 'ACCEPT_INFERIOR_RM_PROGRAM variable to "yes"' >&2
+    echo >&2
+  else
+    cat >&2 <<'END'
+Aborting the configuration process, to ensure you take notice of the issue.
+
+You can download and install GNU coreutils to get an 'rm' implementation
+that behaves properly: <https://www.gnu.org/software/coreutils/>.
+
+If you want to complete the configuration process using your problematic
+'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM
+to "yes", and re-run configure.
+
+END
+    as_fn_error $? "Your 'rm' program is bad, sorry." "$LINENO" 5
+  fi
+fi
+
+# Check whether --enable-silent-rules was given.
+if test ${enable_silent_rules+y}
+then :
+  enableval=$enable_silent_rules;
+fi
+
+case $enable_silent_rules in # (((
+  yes) AM_DEFAULT_VERBOSITY=0;;
+   no) AM_DEFAULT_VERBOSITY=1;;
+    *) AM_DEFAULT_VERBOSITY=0;;
+esac
+am_make=${MAKE-make}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $am_make supports nested variables" >&5
+printf %s "checking whether $am_make supports nested variables... " >&6; }
+if test ${am_cv_make_support_nested_variables+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if printf "%s\n" 'TRUE=$(BAR$(V))
+BAR0=false
+BAR1=true
+V=1
+am__doit:
+	@$(TRUE)
+.PHONY: am__doit' | $am_make -f - >/dev/null 2>&1; then
+  am_cv_make_support_nested_variables=yes
+else
+  am_cv_make_support_nested_variables=no
+fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_make_support_nested_variables" >&5
+printf "%s\n" "$am_cv_make_support_nested_variables" >&6; }
+if test $am_cv_make_support_nested_variables = yes; then
+    AM_V='$(V)'
+  AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
+else
+  AM_V=$AM_DEFAULT_VERBOSITY
+  AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
+fi
+AM_BACKSLASH='\'
+ # make --enable-silent-rules the default.
+
+ac_config_headers="$ac_config_headers config.h:config.hin"
+
+
+
+
+  # Make sure we can run config.sub.
+$SHELL "${ac_aux_dir}config.sub" sun4 >/dev/null 2>&1 ||
+  as_fn_error $? "cannot run $SHELL ${ac_aux_dir}config.sub" "$LINENO" 5
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking build system type" >&5
+printf %s "checking build system type... " >&6; }
+if test ${ac_cv_build+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_build_alias=$build_alias
+test "x$ac_build_alias" = x &&
+  ac_build_alias=`$SHELL "${ac_aux_dir}config.guess"`
+test "x$ac_build_alias" = x &&
+  as_fn_error $? "cannot guess build type; you must specify one" "$LINENO" 5
+ac_cv_build=`$SHELL "${ac_aux_dir}config.sub" $ac_build_alias` ||
+  as_fn_error $? "$SHELL ${ac_aux_dir}config.sub $ac_build_alias failed" "$LINENO" 5
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_build" >&5
+printf "%s\n" "$ac_cv_build" >&6; }
+case $ac_cv_build in
+*-*-*) ;;
+*) as_fn_error $? "invalid value of canonical build" "$LINENO" 5;;
+esac
+build=$ac_cv_build
+ac_save_IFS=$IFS; IFS='-'
+set x $ac_cv_build
+shift
+build_cpu=$1
+build_vendor=$2
+shift; shift
+# Remember, the first character of IFS is used to create $*,
+# except with old shells:
+build_os=$*
+IFS=$ac_save_IFS
+case $build_os in *\ *) build_os=`echo "$build_os" | sed 's/ /-/g'`;; esac
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking host system type" >&5
+printf %s "checking host system type... " >&6; }
+if test ${ac_cv_host+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "x$host_alias" = x; then
+  ac_cv_host=$ac_cv_build
+else
+  ac_cv_host=`$SHELL "${ac_aux_dir}config.sub" $host_alias` ||
+    as_fn_error $? "$SHELL ${ac_aux_dir}config.sub $host_alias failed" "$LINENO" 5
+fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_host" >&5
+printf "%s\n" "$ac_cv_host" >&6; }
+case $ac_cv_host in
+*-*-*) ;;
+*) as_fn_error $? "invalid value of canonical host" "$LINENO" 5;;
+esac
+host=$ac_cv_host
+ac_save_IFS=$IFS; IFS='-'
+set x $ac_cv_host
+shift
+host_cpu=$1
+host_vendor=$2
+shift; shift
+# Remember, the first character of IFS is used to create $*,
+# except with old shells:
+host_os=$*
+IFS=$ac_save_IFS
+case $host_os in *\ *) host_os=`echo "$host_os" | sed 's/ /-/g'`;; esac
+
+
+for ac_prog in gawk mawk nawk awk
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_AWK+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$AWK"; then
+  ac_cv_prog_AWK="$AWK" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_AWK="$ac_prog"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+AWK=$ac_cv_prog_AWK
+if test -n "$AWK"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
+printf "%s\n" "$AWK" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+  test -n "$AWK" && break
+done
+
+
+
+
+
+
+
+
+
+
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}gcc; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="${ac_tool_prefix}gcc"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_CC"; then
+  ac_ct_CC=$CC
+  # Extract the first word of "gcc", so it can be a program name with args.
+set dummy gcc; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="gcc"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf "%s\n" "$ac_ct_CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+  if test "x$ac_ct_CC" = x; then
+    CC=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    CC=$ac_ct_CC
+  fi
+else
+  CC="$ac_cv_prog_CC"
+fi
+
+if test -z "$CC"; then
+          if test -n "$ac_tool_prefix"; then
+    # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}cc; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="${ac_tool_prefix}cc"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+  fi
+fi
+if test -z "$CC"; then
+  # Extract the first word of "cc", so it can be a program name with args.
+set dummy cc; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+  ac_prog_rejected=no
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    if test "$as_dir$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then
+       ac_prog_rejected=yes
+       continue
+     fi
+    ac_cv_prog_CC="cc"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+if test $ac_prog_rejected = yes; then
+  # We found a bogon in the path, so make sure we never use it.
+  set dummy $ac_cv_prog_CC
+  shift
+  if test $# != 0; then
+    # We chose a different compiler from the bogus one.
+    # However, it has the same basename, so the bogon will be chosen
+    # first if we set CC to just the basename; use the full file name.
+    shift
+    ac_cv_prog_CC="$as_dir$ac_word${1+' '}$@"
+  fi
+fi
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+fi
+if test -z "$CC"; then
+  if test -n "$ac_tool_prefix"; then
+  for ac_prog in cl.exe
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="$ac_tool_prefix$ac_prog"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+    test -n "$CC" && break
+  done
+fi
+if test -z "$CC"; then
+  ac_ct_CC=$CC
+  for ac_prog in cl.exe
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="$ac_prog"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf "%s\n" "$ac_ct_CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+  test -n "$ac_ct_CC" && break
+done
+
+  if test "x$ac_ct_CC" = x; then
+    CC=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    CC=$ac_ct_CC
+  fi
+fi
+
+fi
+if test -z "$CC"; then
+  if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}clang", so it can be a program name with args.
+set dummy ${ac_tool_prefix}clang; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="${ac_tool_prefix}clang"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_CC"; then
+  ac_ct_CC=$CC
+  # Extract the first word of "clang", so it can be a program name with args.
+set dummy clang; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="clang"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf "%s\n" "$ac_ct_CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+  if test "x$ac_ct_CC" = x; then
+    CC=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    CC=$ac_ct_CC
+  fi
+else
+  CC="$ac_cv_prog_CC"
+fi
+
+fi
+
+
+test -z "$CC" && { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "no acceptable C compiler found in \$PATH
+See \`config.log' for more details" "$LINENO" 5; }
+
+# Provide some information about the compiler.
+printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
+set X $ac_compile
+ac_compiler=$2
+for ac_option in --version -v -V -qversion -version; do
+  { { ac_try="$ac_compiler $ac_option >&5"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_compiler $ac_option >&5") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    sed '10a\
+... rest of stderr output deleted ...
+         10q' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+  fi
+  rm -f conftest.er1 conftest.err
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+done
+
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files a.out a.out.dSYM a.exe b.out"
+# Try to create an executable without -o first, disregard a.out.
+# It will help us diagnose broken compilers, and finding out an intuition
+# of exeext.
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the C compiler works" >&5
+printf %s "checking whether the C compiler works... " >&6; }
+ac_link_default=`printf "%s\n" "$ac_link" | sed 's/ -o *conftest[^ ]*//'`
+
+# The possible output files:
+ac_files="a.out conftest.exe conftest a.exe a_out.exe b.out conftest.*"
+
+ac_rmfiles=
+for ac_file in $ac_files
+do
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj ) ;;
+    * ) ac_rmfiles="$ac_rmfiles $ac_file";;
+  esac
+done
+rm -f $ac_rmfiles
+
+if { { ac_try="$ac_link_default"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_link_default") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+then :
+  # Autoconf-2.13 could set the ac_cv_exeext variable to `no'.
+# So ignore a value of `no', otherwise this would lead to `EXEEXT = no'
+# in a Makefile.  We should not override ac_cv_exeext if it was cached,
+# so that the user can short-circuit this test for compilers unknown to
+# Autoconf.
+for ac_file in $ac_files ''
+do
+  test -f "$ac_file" || continue
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj )
+	;;
+    [ab].out )
+	# We found the default executable, but exeext='' is most
+	# certainly right.
+	break;;
+    *.* )
+	if test ${ac_cv_exeext+y} && test "$ac_cv_exeext" != no;
+	then :; else
+	   ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
+	fi
+	# We set ac_cv_exeext here because the later test for it is not
+	# safe: cross compilers may not add the suffix if given an `-o'
+	# argument, so we may need to know it at that point already.
+	# Even if this section looks crufty: it has the advantage of
+	# actually working.
+	break;;
+    * )
+	break;;
+  esac
+done
+test "$ac_cv_exeext" = no && ac_cv_exeext=
+
+else $as_nop
+  ac_file=''
+fi
+if test -z "$ac_file"
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+printf "%s\n" "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error 77 "C compiler cannot create executables
+See \`config.log' for more details" "$LINENO" 5; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5
+printf %s "checking for C compiler default output file name... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_file" >&5
+printf "%s\n" "$ac_file" >&6; }
+ac_exeext=$ac_cv_exeext
+
+rm -f -r a.out a.out.dSYM a.exe conftest$ac_cv_exeext b.out
+ac_clean_files=$ac_clean_files_save
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for suffix of executables" >&5
+printf %s "checking for suffix of executables... " >&6; }
+if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+then :
+  # If both `conftest.exe' and `conftest' are `present' (well, observable)
+# catch `conftest.exe'.  For instance with Cygwin, `ls conftest' will
+# work properly (i.e., refer to `conftest.exe'), while it won't with
+# `rm'.
+for ac_file in conftest.exe conftest conftest.*; do
+  test -f "$ac_file" || continue
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj ) ;;
+    *.* ) ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
+	  break;;
+    * ) break;;
+  esac
+done
+else $as_nop
+  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot compute suffix of executables: cannot compile and link
+See \`config.log' for more details" "$LINENO" 5; }
+fi
+rm -f conftest conftest$ac_cv_exeext
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_exeext" >&5
+printf "%s\n" "$ac_cv_exeext" >&6; }
+
+rm -f conftest.$ac_ext
+EXEEXT=$ac_cv_exeext
+ac_exeext=$EXEEXT
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdio.h>
+int
+main (void)
+{
+FILE *f = fopen ("conftest.out", "w");
+ return ferror (f) || fclose (f) != 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+ac_clean_files="$ac_clean_files conftest.out"
+# Check that the compiler produces executables we can run.  If not, either
+# the compiler is broken, or we cross compile.
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether we are cross compiling" >&5
+printf %s "checking whether we are cross compiling... " >&6; }
+if test "$cross_compiling" != yes; then
+  { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+  if { ac_try='./conftest$ac_cv_exeext'
+  { { case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then
+    cross_compiling=no
+  else
+    if test "$cross_compiling" = maybe; then
+	cross_compiling=yes
+    else
+	{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error 77 "cannot run C compiled programs.
+If you meant to cross compile, use \`--host'.
+See \`config.log' for more details" "$LINENO" 5; }
+    fi
+  fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
+printf "%s\n" "$cross_compiling" >&6; }
+
+rm -f conftest.$ac_ext conftest$ac_cv_exeext conftest.out
+ac_clean_files=$ac_clean_files_save
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
+printf %s "checking for suffix of object files... " >&6; }
+if test ${ac_cv_objext+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.o conftest.obj
+if { { ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_compile") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+then :
+  for ac_file in conftest.o conftest.obj conftest.*; do
+  test -f "$ac_file" || continue;
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM ) ;;
+    *) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'`
+       break;;
+  esac
+done
+else $as_nop
+  printf "%s\n" "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot compute suffix of object files: cannot compile
+See \`config.log' for more details" "$LINENO" 5; }
+fi
+rm -f conftest.$ac_cv_objext conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_objext" >&5
+printf "%s\n" "$ac_cv_objext" >&6; }
+OBJEXT=$ac_cv_objext
+ac_objext=$OBJEXT
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports GNU C" >&5
+printf %s "checking whether the compiler supports GNU C... " >&6; }
+if test ${ac_cv_c_compiler_gnu+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+#ifndef __GNUC__
+       choke me
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_compiler_gnu=yes
+else $as_nop
+  ac_compiler_gnu=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+ac_cv_c_compiler_gnu=$ac_compiler_gnu
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
+printf "%s\n" "$ac_cv_c_compiler_gnu" >&6; }
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+if test $ac_compiler_gnu = yes; then
+  GCC=yes
+else
+  GCC=
+fi
+ac_test_CFLAGS=${CFLAGS+y}
+ac_save_CFLAGS=$CFLAGS
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
+printf %s "checking whether $CC accepts -g... " >&6; }
+if test ${ac_cv_prog_cc_g+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_save_c_werror_flag=$ac_c_werror_flag
+   ac_c_werror_flag=yes
+   ac_cv_prog_cc_g=no
+   CFLAGS="-g"
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_g=yes
+else $as_nop
+  CFLAGS=""
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+
+else $as_nop
+  ac_c_werror_flag=$ac_save_c_werror_flag
+	 CFLAGS="-g"
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_g=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+   ac_c_werror_flag=$ac_save_c_werror_flag
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
+printf "%s\n" "$ac_cv_prog_cc_g" >&6; }
+if test $ac_test_CFLAGS; then
+  CFLAGS=$ac_save_CFLAGS
+elif test $ac_cv_prog_cc_g = yes; then
+  if test "$GCC" = yes; then
+    CFLAGS="-g -O2"
+  else
+    CFLAGS="-g"
+  fi
+else
+  if test "$GCC" = yes; then
+    CFLAGS="-O2"
+  else
+    CFLAGS=
+  fi
+fi
+ac_prog_cc_stdc=no
+if test x$ac_prog_cc_stdc = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C11 features" >&5
+printf %s "checking for $CC option to enable C11 features... " >&6; }
+if test ${ac_cv_prog_cc_c11+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_prog_cc_c11=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_c_conftest_c11_program
+_ACEOF
+for ac_arg in '' -std=gnu11
+do
+  CC="$ac_save_CC $ac_arg"
+  if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_c11=$ac_arg
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam
+  test "x$ac_cv_prog_cc_c11" != "xno" && break
+done
+rm -f conftest.$ac_ext
+CC=$ac_save_CC
+fi
+
+if test "x$ac_cv_prog_cc_c11" = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf "%s\n" "unsupported" >&6; }
+else $as_nop
+  if test "x$ac_cv_prog_cc_c11" = x
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf "%s\n" "none needed" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c11" >&5
+printf "%s\n" "$ac_cv_prog_cc_c11" >&6; }
+     CC="$CC $ac_cv_prog_cc_c11"
+fi
+  ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c11
+  ac_prog_cc_stdc=c11
+fi
+fi
+if test x$ac_prog_cc_stdc = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C99 features" >&5
+printf %s "checking for $CC option to enable C99 features... " >&6; }
+if test ${ac_cv_prog_cc_c99+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_prog_cc_c99=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_c_conftest_c99_program
+_ACEOF
+for ac_arg in '' -std=gnu99 -std=c99 -c99 -qlanglvl=extc1x -qlanglvl=extc99 -AC99 -D_STDC_C99=
+do
+  CC="$ac_save_CC $ac_arg"
+  if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_c99=$ac_arg
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam
+  test "x$ac_cv_prog_cc_c99" != "xno" && break
+done
+rm -f conftest.$ac_ext
+CC=$ac_save_CC
+fi
+
+if test "x$ac_cv_prog_cc_c99" = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf "%s\n" "unsupported" >&6; }
+else $as_nop
+  if test "x$ac_cv_prog_cc_c99" = x
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf "%s\n" "none needed" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c99" >&5
+printf "%s\n" "$ac_cv_prog_cc_c99" >&6; }
+     CC="$CC $ac_cv_prog_cc_c99"
+fi
+  ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c99
+  ac_prog_cc_stdc=c99
+fi
+fi
+if test x$ac_prog_cc_stdc = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C89 features" >&5
+printf %s "checking for $CC option to enable C89 features... " >&6; }
+if test ${ac_cv_prog_cc_c89+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_prog_cc_c89=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_c_conftest_c89_program
+_ACEOF
+for ac_arg in '' -qlanglvl=extc89 -qlanglvl=ansi -std -Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
+do
+  CC="$ac_save_CC $ac_arg"
+  if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_c89=$ac_arg
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam
+  test "x$ac_cv_prog_cc_c89" != "xno" && break
+done
+rm -f conftest.$ac_ext
+CC=$ac_save_CC
+fi
+
+if test "x$ac_cv_prog_cc_c89" = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf "%s\n" "unsupported" >&6; }
+else $as_nop
+  if test "x$ac_cv_prog_cc_c89" = x
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf "%s\n" "none needed" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
+printf "%s\n" "$ac_cv_prog_cc_c89" >&6; }
+     CC="$CC $ac_cv_prog_cc_c89"
+fi
+  ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c89
+  ac_prog_cc_stdc=c89
+fi
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC understands -c and -o together" >&5
+printf %s "checking whether $CC understands -c and -o together... " >&6; }
+if test ${am_cv_prog_cc_c_o+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+  # Make sure it works both with $CC and with simple cc.
+  # Following AC_PROG_CC_C_O, we do the test twice because some
+  # compilers refuse to overwrite an existing .o file with -o,
+  # though they will create one.
+  am_cv_prog_cc_c_o=yes
+  for am_i in 1 2; do
+    if { echo "$as_me:$LINENO: $CC -c conftest.$ac_ext -o conftest2.$ac_objext" >&5
+   ($CC -c conftest.$ac_ext -o conftest2.$ac_objext) >&5 2>&5
+   ac_status=$?
+   echo "$as_me:$LINENO: \$? = $ac_status" >&5
+   (exit $ac_status); } \
+         && test -f conftest2.$ac_objext; then
+      : OK
+    else
+      am_cv_prog_cc_c_o=no
+      break
+    fi
+  done
+  rm -f core conftest*
+  unset am_i
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_prog_cc_c_o" >&5
+printf "%s\n" "$am_cv_prog_cc_c_o" >&6; }
+if test "$am_cv_prog_cc_c_o" != yes; then
+   # Losing compiler, so override with the script.
+   # FIXME: It is wrong to rewrite CC.
+   # But if we don't then we get into trouble of one sort or another.
+   # A longer-term fix would be to have automake use am__CC in this case,
+   # and then we could set am__CC="\$(top_srcdir)/compile \$(CC)"
+   CC="$am_aux_dir/compile $CC"
+fi
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the compiler is clang" >&5
+printf %s "checking whether the compiler is clang... " >&6; }
+if test ${gl_cv_compiler_clang+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+                 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+           #ifdef __clang__
+           barfbarf
+           #endif
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_compiler_clang=no
+else $as_nop
+  gl_cv_compiler_clang=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_compiler_clang" >&5
+printf "%s\n" "$gl_cv_compiler_clang" >&6; }
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for compiler option needed when checking for declarations" >&5
+printf %s "checking for compiler option needed when checking for declarations... " >&6; }
+if test ${gl_cv_compiler_check_decl_option+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test $gl_cv_compiler_clang = yes; then
+                     save_ac_compile="$ac_compile"
+       ac_compile="$ac_compile -Werror=implicit-function-declaration"
+                     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_compiler_check_decl_option='-Werror=implicit-function-declaration'
+else $as_nop
+  gl_cv_compiler_check_decl_option=none
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+       ac_compile="$save_ac_compile"
+     else
+       gl_cv_compiler_check_decl_option=none
+     fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_compiler_check_decl_option" >&5
+printf "%s\n" "$gl_cv_compiler_check_decl_option" >&6; }
+  if test "x$gl_cv_compiler_check_decl_option" != xnone; then
+    ac_compile_for_check_decl="$ac_compile $gl_cv_compiler_check_decl_option"
+  else
+    ac_compile_for_check_decl="$ac_compile"
+  fi
+
+DEPDIR="${am__leading_dot}deps"
+
+ac_config_commands="$ac_config_commands depfiles"
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether ${MAKE-make} supports the include directive" >&5
+printf %s "checking whether ${MAKE-make} supports the include directive... " >&6; }
+cat > confinc.mk << 'END'
+am__doit:
+	@echo this is the am__doit target >confinc.out
+.PHONY: am__doit
+END
+am__include="#"
+am__quote=
+# BSD make does it like this.
+echo '.include "confinc.mk" # ignored' > confmf.BSD
+# Other make implementations (GNU, Solaris 10, AIX) do it like this.
+echo 'include confinc.mk # ignored' > confmf.GNU
+_am_result=no
+for s in GNU BSD; do
+  { echo "$as_me:$LINENO: ${MAKE-make} -f confmf.$s && cat confinc.out" >&5
+   (${MAKE-make} -f confmf.$s && cat confinc.out) >&5 2>&5
+   ac_status=$?
+   echo "$as_me:$LINENO: \$? = $ac_status" >&5
+   (exit $ac_status); }
+  case $?:`cat confinc.out 2>/dev/null` in #(
+  '0:this is the am__doit target') :
+    case $s in #(
+  BSD) :
+    am__include='.include' am__quote='"' ;; #(
+  *) :
+    am__include='include' am__quote='' ;;
+esac ;; #(
+  *) :
+     ;;
+esac
+  if test "$am__include" != "#"; then
+    _am_result="yes ($s style)"
+    break
+  fi
+done
+rm -f confinc.* confmf.*
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: ${_am_result}" >&5
+printf "%s\n" "${_am_result}" >&6; }
+
+# Check whether --enable-dependency-tracking was given.
+if test ${enable_dependency_tracking+y}
+then :
+  enableval=$enable_dependency_tracking;
+fi
+
+if test "x$enable_dependency_tracking" != xno; then
+  am_depcomp="$ac_aux_dir/depcomp"
+  AMDEPBACKSLASH='\'
+  am__nodep='_no'
+fi
+ if test "x$enable_dependency_tracking" != xno; then
+  AMDEP_TRUE=
+  AMDEP_FALSE='#'
+else
+  AMDEP_TRUE='#'
+  AMDEP_FALSE=
+fi
+
+
+
+depcc="$CC"   am_compiler_list=
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking dependency style of $depcc" >&5
+printf %s "checking dependency style of $depcc... " >&6; }
+if test ${am_cv_CC_dependencies_compiler_type+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -z "$AMDEP_TRUE" && test -f "$am_depcomp"; then
+  # We make a subdir and do the tests there.  Otherwise we can end up
+  # making bogus files that we don't know about and never remove.  For
+  # instance it was reported that on HP-UX the gcc test will end up
+  # making a dummy file named 'D' -- because '-MD' means "put the output
+  # in D".
+  rm -rf conftest.dir
+  mkdir conftest.dir
+  # Copy depcomp to subdir because otherwise we won't find it if we're
+  # using a relative directory.
+  cp "$am_depcomp" conftest.dir
+  cd conftest.dir
+  # We will build objects and dependencies in a subdirectory because
+  # it helps to detect inapplicable dependency modes.  For instance
+  # both Tru64's cc and ICC support -MD to output dependencies as a
+  # side effect of compilation, but ICC will put the dependencies in
+  # the current directory while Tru64 will put them in the object
+  # directory.
+  mkdir sub
+
+  am_cv_CC_dependencies_compiler_type=none
+  if test "$am_compiler_list" = ""; then
+     am_compiler_list=`sed -n 's/^#*\([a-zA-Z0-9]*\))$/\1/p' < ./depcomp`
+  fi
+  am__universal=false
+  case " $depcc " in #(
+     *\ -arch\ *\ -arch\ *) am__universal=true ;;
+     esac
+
+  for depmode in $am_compiler_list; do
+    # Setup a source with many dependencies, because some compilers
+    # like to wrap large dependency lists on column 80 (with \), and
+    # we should not choose a depcomp mode which is confused by this.
+    #
+    # We need to recreate these files for each test, as the compiler may
+    # overwrite some of them when testing with obscure command lines.
+    # This happens at least with the AIX C compiler.
+    : > sub/conftest.c
+    for i in 1 2 3 4 5 6; do
+      echo '#include "conftst'$i'.h"' >> sub/conftest.c
+      # Using ": > sub/conftst$i.h" creates only sub/conftst1.h with
+      # Solaris 10 /bin/sh.
+      echo '/* dummy */' > sub/conftst$i.h
+    done
+    echo "${am__include} ${am__quote}sub/conftest.Po${am__quote}" > confmf
+
+    # We check with '-c' and '-o' for the sake of the "dashmstdout"
+    # mode.  It turns out that the SunPro C++ compiler does not properly
+    # handle '-M -o', and we need to detect this.  Also, some Intel
+    # versions had trouble with output in subdirs.
+    am__obj=sub/conftest.${OBJEXT-o}
+    am__minus_obj="-o $am__obj"
+    case $depmode in
+    gcc)
+      # This depmode causes a compiler race in universal mode.
+      test "$am__universal" = false || continue
+      ;;
+    nosideeffect)
+      # After this tag, mechanisms are not by side-effect, so they'll
+      # only be used when explicitly requested.
+      if test "x$enable_dependency_tracking" = xyes; then
+	continue
+      else
+	break
+      fi
+      ;;
+    msvc7 | msvc7msys | msvisualcpp | msvcmsys)
+      # This compiler won't grok '-c -o', but also, the minuso test has
+      # not run yet.  These depmodes are late enough in the game, and
+      # so weak that their functioning should not be impacted.
+      am__obj=conftest.${OBJEXT-o}
+      am__minus_obj=
+      ;;
+    none) break ;;
+    esac
+    if depmode=$depmode \
+       source=sub/conftest.c object=$am__obj \
+       depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo \
+       $SHELL ./depcomp $depcc -c $am__minus_obj sub/conftest.c \
+         >/dev/null 2>conftest.err &&
+       grep sub/conftst1.h sub/conftest.Po > /dev/null 2>&1 &&
+       grep sub/conftst6.h sub/conftest.Po > /dev/null 2>&1 &&
+       grep $am__obj sub/conftest.Po > /dev/null 2>&1 &&
+       ${MAKE-make} -s -f confmf > /dev/null 2>&1; then
+      # icc doesn't choke on unknown options, it will just issue warnings
+      # or remarks (even with -Werror).  So we grep stderr for any message
+      # that says an option was ignored or not supported.
+      # When given -MP, icc 7.0 and 7.1 complain thusly:
+      #   icc: Command line warning: ignoring option '-M'; no argument required
+      # The diagnosis changed in icc 8.0:
+      #   icc: Command line remark: option '-MP' not supported
+      if (grep 'ignoring option' conftest.err ||
+          grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
+        am_cv_CC_dependencies_compiler_type=$depmode
+        break
+      fi
+    fi
+  done
+
+  cd ..
+  rm -rf conftest.dir
+else
+  am_cv_CC_dependencies_compiler_type=none
+fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_CC_dependencies_compiler_type" >&5
+printf "%s\n" "$am_cv_CC_dependencies_compiler_type" >&6; }
+CCDEPMODE=depmode=$am_cv_CC_dependencies_compiler_type
+
+ if
+  test "x$enable_dependency_tracking" != xno \
+  && test "$am_cv_CC_dependencies_compiler_type" = gcc3; then
+  am__fastdepCC_TRUE=
+  am__fastdepCC_FALSE='#'
+else
+  am__fastdepCC_TRUE='#'
+  am__fastdepCC_FALSE=
+fi
+
+
+
+ac_header= ac_cache=
+for ac_item in $ac_header_c_list
+do
+  if test $ac_cache; then
+    ac_fn_c_check_header_compile "$LINENO" $ac_header ac_cv_header_$ac_cache "$ac_includes_default"
+    if eval test \"x\$ac_cv_header_$ac_cache\" = xyes; then
+      printf "%s\n" "#define $ac_item 1" >> confdefs.h
+    fi
+    ac_header= ac_cache=
+  elif test $ac_header; then
+    ac_cache=$ac_item
+  else
+    ac_header=$ac_item
+  fi
+done
+
+
+
+
+
+
+
+
+if test $ac_cv_header_stdlib_h = yes && test $ac_cv_header_string_h = yes
+then :
+
+printf "%s\n" "#define STDC_HEADERS 1" >>confdefs.h
+
+fi
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether it is safe to define __EXTENSIONS__" >&5
+printf %s "checking whether it is safe to define __EXTENSIONS__... " >&6; }
+if test ${ac_cv_safe_to_define___extensions__+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#         define __EXTENSIONS__ 1
+          $ac_includes_default
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_safe_to_define___extensions__=yes
+else $as_nop
+  ac_cv_safe_to_define___extensions__=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_safe_to_define___extensions__" >&5
+printf "%s\n" "$ac_cv_safe_to_define___extensions__" >&6; }
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether _XOPEN_SOURCE should be defined" >&5
+printf %s "checking whether _XOPEN_SOURCE should be defined... " >&6; }
+if test ${ac_cv_should_define__xopen_source+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_should_define__xopen_source=no
+    if test $ac_cv_header_wchar_h = yes
+then :
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+          #include <wchar.h>
+          mbstate_t x;
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+            #define _XOPEN_SOURCE 500
+            #include <wchar.h>
+            mbstate_t x;
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_should_define__xopen_source=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_should_define__xopen_source" >&5
+printf "%s\n" "$ac_cv_should_define__xopen_source" >&6; }
+
+  printf "%s\n" "#define _ALL_SOURCE 1" >>confdefs.h
+
+  printf "%s\n" "#define _DARWIN_C_SOURCE 1" >>confdefs.h
+
+  printf "%s\n" "#define _GNU_SOURCE 1" >>confdefs.h
+
+  printf "%s\n" "#define _HPUX_ALT_XOPEN_SOCKET_API 1" >>confdefs.h
+
+  printf "%s\n" "#define _NETBSD_SOURCE 1" >>confdefs.h
+
+  printf "%s\n" "#define _OPENBSD_SOURCE 1" >>confdefs.h
+
+  printf "%s\n" "#define _POSIX_PTHREAD_SEMANTICS 1" >>confdefs.h
+
+  printf "%s\n" "#define __STDC_WANT_IEC_60559_ATTRIBS_EXT__ 1" >>confdefs.h
+
+  printf "%s\n" "#define __STDC_WANT_IEC_60559_BFP_EXT__ 1" >>confdefs.h
+
+  printf "%s\n" "#define __STDC_WANT_IEC_60559_DFP_EXT__ 1" >>confdefs.h
+
+  printf "%s\n" "#define __STDC_WANT_IEC_60559_FUNCS_EXT__ 1" >>confdefs.h
+
+  printf "%s\n" "#define __STDC_WANT_IEC_60559_TYPES_EXT__ 1" >>confdefs.h
+
+  printf "%s\n" "#define __STDC_WANT_LIB_EXT2__ 1" >>confdefs.h
+
+  printf "%s\n" "#define __STDC_WANT_MATH_SPEC_FUNCS__ 1" >>confdefs.h
+
+  printf "%s\n" "#define _TANDEM_SOURCE 1" >>confdefs.h
+
+  if test $ac_cv_header_minix_config_h = yes
+then :
+  MINIX=yes
+    printf "%s\n" "#define _MINIX 1" >>confdefs.h
+
+    printf "%s\n" "#define _POSIX_SOURCE 1" >>confdefs.h
+
+    printf "%s\n" "#define _POSIX_1_SOURCE 2" >>confdefs.h
+
+else $as_nop
+  MINIX=
+fi
+  if test $ac_cv_safe_to_define___extensions__ = yes
+then :
+  printf "%s\n" "#define __EXTENSIONS__ 1" >>confdefs.h
+
+fi
+  if test $ac_cv_should_define__xopen_source = yes
+then :
+  printf "%s\n" "#define _XOPEN_SOURCE 500" >>confdefs.h
+
+fi
+
+
+
+
+
+  case "$host_os" in
+    openbsd*)
+
+printf "%s\n" "#define _ISOC11_SOURCE 1" >>confdefs.h
+
+      ;;
+  esac
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to run the C preprocessor" >&5
+printf %s "checking how to run the C preprocessor... " >&6; }
+# On Suns, sometimes $CPP names a directory.
+if test -n "$CPP" && test -d "$CPP"; then
+  CPP=
+fi
+if test -z "$CPP"; then
+  if test ${ac_cv_prog_CPP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+      # Double quotes because $CC needs to be expanded
+    for CPP in "$CC -E" "$CC -E -traditional-cpp" cpp /lib/cpp
+    do
+      ac_preproc_ok=false
+for ac_c_preproc_warn_flag in '' yes
+do
+  # Use a header file that comes with gcc, so configuring glibc
+  # with a fresh cross-compiler works.
+  # On the NeXT, cc -E runs the code through the compiler's parser,
+  # not just through cpp. "Syntax error" is here to catch this case.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <limits.h>
+		     Syntax error
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"
+then :
+
+else $as_nop
+  # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+  # OK, works on sane cases.  Now check whether nonexistent headers
+  # can be detected and how.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <ac_nonexistent.h>
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"
+then :
+  # Broken: success on invalid input.
+continue
+else $as_nop
+  # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.i conftest.err conftest.$ac_ext
+if $ac_preproc_ok
+then :
+  break
+fi
+
+    done
+    ac_cv_prog_CPP=$CPP
+
+fi
+  CPP=$ac_cv_prog_CPP
+else
+  ac_cv_prog_CPP=$CPP
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CPP" >&5
+printf "%s\n" "$CPP" >&6; }
+ac_preproc_ok=false
+for ac_c_preproc_warn_flag in '' yes
+do
+  # Use a header file that comes with gcc, so configuring glibc
+  # with a fresh cross-compiler works.
+  # On the NeXT, cc -E runs the code through the compiler's parser,
+  # not just through cpp. "Syntax error" is here to catch this case.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <limits.h>
+		     Syntax error
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"
+then :
+
+else $as_nop
+  # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+  # OK, works on sane cases.  Now check whether nonexistent headers
+  # can be detected and how.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <ac_nonexistent.h>
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"
+then :
+  # Broken: success on invalid input.
+continue
+else $as_nop
+  # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.i conftest.err conftest.$ac_ext
+if $ac_preproc_ok
+then :
+
+else $as_nop
+  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "C preprocessor \"$CPP\" fails sanity check
+See \`config.log' for more details" "$LINENO" 5; }
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
+printf %s "checking for grep that handles long lines and -e... " >&6; }
+if test ${ac_cv_path_GREP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -z "$GREP"; then
+  ac_path_GREP_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_prog in grep ggrep
+   do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_GREP="$as_dir$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_GREP" || continue
+# Check for GNU ac_path_GREP and select it if it is found.
+  # Check for GNU $ac_path_GREP
+case `"$ac_path_GREP" --version 2>&1` in
+*GNU*)
+  ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
+*)
+  ac_count=0
+  printf %s 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    printf "%s\n" 'GREP' >> "conftest.nl"
+    "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_GREP_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_GREP="$ac_path_GREP"
+      ac_path_GREP_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_GREP_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_GREP"; then
+    as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  fi
+else
+  ac_cv_path_GREP=$GREP
+fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
+printf "%s\n" "$ac_cv_path_GREP" >&6; }
+ GREP="$ac_cv_path_GREP"
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
+printf %s "checking for egrep... " >&6; }
+if test ${ac_cv_path_EGREP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
+   then ac_cv_path_EGREP="$GREP -E"
+   else
+     if test -z "$EGREP"; then
+  ac_path_EGREP_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_prog in egrep
+   do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_EGREP="$as_dir$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_EGREP" || continue
+# Check for GNU ac_path_EGREP and select it if it is found.
+  # Check for GNU $ac_path_EGREP
+case `"$ac_path_EGREP" --version 2>&1` in
+*GNU*)
+  ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
+*)
+  ac_count=0
+  printf %s 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    printf "%s\n" 'EGREP' >> "conftest.nl"
+    "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_EGREP_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_EGREP="$ac_path_EGREP"
+      ac_path_EGREP_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_EGREP_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_EGREP"; then
+    as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  fi
+else
+  ac_cv_path_EGREP=$EGREP
+fi
+
+   fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
+printf "%s\n" "$ac_cv_path_EGREP" >&6; }
+ EGREP="$ac_cv_path_EGREP"
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for Minix Amsterdam compiler" >&5
+printf %s "checking for Minix Amsterdam compiler... " >&6; }
+if test ${gl_cv_c_amsterdam_compiler+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#ifdef __ACK__
+Amsterdam
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Amsterdam" >/dev/null 2>&1
+then :
+  gl_cv_c_amsterdam_compiler=yes
+else $as_nop
+  gl_cv_c_amsterdam_compiler=no
+fi
+rm -rf conftest*
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_c_amsterdam_compiler" >&5
+printf "%s\n" "$gl_cv_c_amsterdam_compiler" >&6; }
+
+      if test $gl_cv_c_amsterdam_compiler = yes; then
+    if test -z "$AR"; then
+      AR='cc -c.a'
+    fi
+    if test -z "$ARFLAGS"; then
+      ARFLAGS='-o'
+    fi
+  else
+                                                :
+  fi
+
+        if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}ar", so it can be a program name with args.
+set dummy ${ac_tool_prefix}ar; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_AR+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$AR"; then
+  ac_cv_prog_AR="$AR" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_AR="${ac_tool_prefix}ar"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+AR=$ac_cv_prog_AR
+if test -n "$AR"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $AR" >&5
+printf "%s\n" "$AR" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_AR"; then
+  ac_ct_AR=$AR
+  # Extract the first word of "ar", so it can be a program name with args.
+set dummy ar; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_AR+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$ac_ct_AR"; then
+  ac_cv_prog_ac_ct_AR="$ac_ct_AR" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_AR="ar"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_AR=$ac_cv_prog_ac_ct_AR
+if test -n "$ac_ct_AR"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AR" >&5
+printf "%s\n" "$ac_ct_AR" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+  if test "x$ac_ct_AR" = x; then
+    AR="ar"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    AR=$ac_ct_AR
+  fi
+else
+  AR="$ac_cv_prog_AR"
+fi
+
+  if test -z "$ARFLAGS"; then
+    ARFLAGS='cr'
+  fi
+
+
+
+  if test -z "$RANLIB"; then
+    if test $gl_cv_c_amsterdam_compiler = yes; then
+      RANLIB=':'
+    else
+            if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}ranlib", so it can be a program name with args.
+set dummy ${ac_tool_prefix}ranlib; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_RANLIB+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$RANLIB"; then
+  ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_RANLIB="${ac_tool_prefix}ranlib"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+RANLIB=$ac_cv_prog_RANLIB
+if test -n "$RANLIB"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $RANLIB" >&5
+printf "%s\n" "$RANLIB" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_RANLIB"; then
+  ac_ct_RANLIB=$RANLIB
+  # Extract the first word of "ranlib", so it can be a program name with args.
+set dummy ranlib; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_RANLIB+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$ac_ct_RANLIB"; then
+  ac_cv_prog_ac_ct_RANLIB="$ac_ct_RANLIB" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_RANLIB="ranlib"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_RANLIB=$ac_cv_prog_ac_ct_RANLIB
+if test -n "$ac_ct_RANLIB"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_RANLIB" >&5
+printf "%s\n" "$ac_ct_RANLIB" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+  if test "x$ac_ct_RANLIB" = x; then
+    RANLIB=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    RANLIB=$ac_ct_RANLIB
+  fi
+else
+  RANLIB="$ac_cv_prog_RANLIB"
+fi
+
+    fi
+  fi
+
+
+
+
+
+
+  # IEEE behaviour is the default on all CPUs except Alpha and SH
+  # (according to the test results of Bruno Haible's ieeefp/fenv_default.m4
+  # and the GCC 4.1.2 manual).
+  case "$host_cpu" in
+    alpha*)
+      # On Alpha systems, a compiler option provides the behaviour.
+      # See the ieee(3) manual page, also available at
+      # <https://backdrift.org/man/tru64/man3/ieee.3.html>
+      if test -n "$GCC"; then
+        # GCC has the option -mieee.
+        # For full IEEE compliance (rarely needed), use option -mieee-with-inexact.
+        CPPFLAGS="$CPPFLAGS -mieee"
+      else
+        # Compaq (ex-DEC) C has the option -ieee, equivalent to -ieee_with_no_inexact.
+        # For full IEEE compliance (rarely needed), use option -ieee_with_inexact.
+        CPPFLAGS="$CPPFLAGS -ieee"
+      fi
+      ;;
+    sh*)
+      if test -n "$GCC"; then
+        # GCC has the option -mieee.
+        CPPFLAGS="$CPPFLAGS -mieee"
+      fi
+      ;;
+  esac
+
+# Check whether --enable-largefile was given.
+if test ${enable_largefile+y}
+then :
+  enableval=$enable_largefile;
+fi
+
+if test "$enable_largefile" != no
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for special C compiler options needed for large files" >&5
+printf %s "checking for special C compiler options needed for large files... " >&6; }
+if test ${ac_cv_sys_largefile_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_sys_largefile_CC=no
+     if test "$GCC" != yes; then
+       ac_save_CC=$CC
+       while :; do
+         # IRIX 6.2 and later do not support large files by default,
+         # so use the C compiler's -n32 option if that helps.
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+    We can't simply define LARGE_OFF_T to be 9223372036854775807,
+    since some C++ compilers masquerading as C compilers
+    incorrectly reject 9223372036854775807.  */
+#define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
+  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+		       && LARGE_OFF_T % 2147483647 == 1)
+		      ? 1 : -1];
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+         if ac_fn_c_try_compile "$LINENO"
+then :
+  break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam
+         CC="$CC -n32"
+         if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_sys_largefile_CC=' -n32'; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam
+         break
+       done
+       CC=$ac_save_CC
+       rm -f conftest.$ac_ext
+    fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_largefile_CC" >&5
+printf "%s\n" "$ac_cv_sys_largefile_CC" >&6; }
+  if test "$ac_cv_sys_largefile_CC" != no; then
+    CC=$CC$ac_cv_sys_largefile_CC
+  fi
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for _FILE_OFFSET_BITS value needed for large files" >&5
+printf %s "checking for _FILE_OFFSET_BITS value needed for large files... " >&6; }
+if test ${ac_cv_sys_file_offset_bits+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  while :; do
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+    We can't simply define LARGE_OFF_T to be 9223372036854775807,
+    since some C++ compilers masquerading as C compilers
+    incorrectly reject 9223372036854775807.  */
+#define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
+  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+		       && LARGE_OFF_T % 2147483647 == 1)
+		      ? 1 : -1];
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_sys_file_offset_bits=no; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#undef _FILE_OFFSET_BITS
+#define _FILE_OFFSET_BITS 64
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+    We can't simply define LARGE_OFF_T to be 9223372036854775807,
+    since some C++ compilers masquerading as C compilers
+    incorrectly reject 9223372036854775807.  */
+#define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
+  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+		       && LARGE_OFF_T % 2147483647 == 1)
+		      ? 1 : -1];
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_sys_file_offset_bits=64; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+  ac_cv_sys_file_offset_bits=unknown
+  break
+done
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_file_offset_bits" >&5
+printf "%s\n" "$ac_cv_sys_file_offset_bits" >&6; }
+case $ac_cv_sys_file_offset_bits in #(
+  no | unknown) ;;
+  *)
+printf "%s\n" "#define _FILE_OFFSET_BITS $ac_cv_sys_file_offset_bits" >>confdefs.h
+;;
+esac
+rm -rf conftest*
+  case $ac_cv_sys_file_offset_bits in #(
+  unknown) :
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for _LARGE_FILES value needed for large files" >&5
+printf %s "checking for _LARGE_FILES value needed for large files... " >&6; }
+if test ${ac_cv_sys_large_files+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  while :; do
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+    We can't simply define LARGE_OFF_T to be 9223372036854775807,
+    since some C++ compilers masquerading as C compilers
+    incorrectly reject 9223372036854775807.  */
+#define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
+  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+		       && LARGE_OFF_T % 2147483647 == 1)
+		      ? 1 : -1];
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_sys_large_files=no; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#undef _LARGE_FILES
+#define _LARGE_FILES 1
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+    We can't simply define LARGE_OFF_T to be 9223372036854775807,
+    since some C++ compilers masquerading as C compilers
+    incorrectly reject 9223372036854775807.  */
+#define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
+  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+		       && LARGE_OFF_T % 2147483647 == 1)
+		      ? 1 : -1];
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_sys_large_files=1; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+  ac_cv_sys_large_files=unknown
+  break
+done
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_large_files" >&5
+printf "%s\n" "$ac_cv_sys_large_files" >&6; }
+case $ac_cv_sys_large_files in #(
+  no | unknown) ;;
+  *)
+printf "%s\n" "#define _LARGE_FILES $ac_cv_sys_large_files" >>confdefs.h
+;;
+esac
+rm -rf conftest* ;; #(
+  64) :
+
+ # Check whether --enable-year2038 was given.
+if test ${enable_year2038+y}
+then :
+  enableval=$enable_year2038;
+fi
+
+ if test "$enable_year2038" != no
+then :
+
+                            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for time_t past the year 2038" >&5
+printf %s "checking for time_t past the year 2038... " >&6; }
+if test ${gl_cv_type_time_t_y2038+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+  #include <time.h>
+  /* Check that time_t can represent 2**32 - 1 correctly.  */
+  #define LARGE_TIME_T \\
+    ((time_t) (((time_t) 1 << 30) - 1 + 3 * ((time_t) 1 << 30)))
+  int verify_time_t_range[(LARGE_TIME_T / 65537 == 65535
+                           && LARGE_TIME_T % 65537 == 0)
+                          ? 1 : -1];
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_type_time_t_y2038=yes
+else $as_nop
+  gl_cv_type_time_t_y2038=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_type_time_t_y2038" >&5
+printf "%s\n" "$gl_cv_type_time_t_y2038" >&6; }
+  if test "$gl_cv_type_time_t_y2038" = no; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for 64-bit time_t with _TIME_BITS=64" >&5
+printf %s "checking for 64-bit time_t with _TIME_BITS=64... " >&6; }
+if test ${gl_cv_type_time_t_bits_macro+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#define _TIME_BITS 64
+                           #define _FILE_OFFSET_BITS 64
+
+  #include <time.h>
+  /* Check that time_t can represent 2**32 - 1 correctly.  */
+  #define LARGE_TIME_T \\
+    ((time_t) (((time_t) 1 << 30) - 1 + 3 * ((time_t) 1 << 30)))
+  int verify_time_t_range[(LARGE_TIME_T / 65537 == 65535
+                           && LARGE_TIME_T % 65537 == 0)
+                          ? 1 : -1];
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_type_time_t_bits_macro=yes
+else $as_nop
+  gl_cv_type_time_t_bits_macro=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_type_time_t_bits_macro" >&5
+printf "%s\n" "$gl_cv_type_time_t_bits_macro" >&6; }
+    if test "$gl_cv_type_time_t_bits_macro" = yes; then
+
+printf "%s\n" "#define _TIME_BITS 64" >>confdefs.h
+
+
+printf "%s\n" "#define _FILE_OFFSET_BITS 64" >>confdefs.h
+
+      gl_cv_type_time_t_y2038=yes
+    fi
+  fi
+  if test $gl_cv_type_time_t_y2038 = no; then
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef _USE_32BIT_TIME_T
+             int ok;
+           #else
+             error fail
+           #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "The 'time_t' type stops working after January 2038.
+          Remove _USE_32BIT_TIME_T from the compiler flags.
+See \`config.log' for more details" "$LINENO" 5; }
+else $as_nop
+  # If not cross-compiling and  says we should check,
+       # and 'touch' works with a large timestamp, then evidently wider time_t
+       # is desired and supported, so fail and ask the builder to fix the
+       # problem.  Otherwise, just warn the builder.
+
+       if test "$gl_warned_about_y2038" != yes; then
+         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: The 'time_t' type stops working after January 2038,
+            and this package needs a wider 'time_t' type
+            if there is any way to access timestamps after that.
+            Configure with 'CC=\"${CC} -m64\"' perhaps?" >&5
+printf "%s\n" "$as_me: WARNING: The 'time_t' type stops working after January 2038,
+            and this package needs a wider 'time_t' type
+            if there is any way to access timestamps after that.
+            Configure with 'CC=\"${CC} -m64\"' perhaps?" >&2;}
+         gl_warned_about_y2038=yes
+       fi
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+  fi
+fi
+ ;; #(
+  *) :
+     ;;
+esac
+fi
+
+
+
+  case "$host_os" in
+    mingw*)
+
+printf "%s\n" "#define __MINGW_USE_VC2005_COMPAT 1" >>confdefs.h
+
+      ;;
+  esac
+
+
+
+
+
+
+
+  # Check whether --enable-threads was given.
+if test ${enable_threads+y}
+then :
+  enableval=$enable_threads; gl_use_threads=$enableval
+else $as_nop
+  if test -n "$gl_use_threads_default"; then
+       gl_use_threads="$gl_use_threads_default"
+     else
+       case "$host_os" in
+                                    osf*) gl_use_threads=no ;;
+                                    cygwin*)
+               case `uname -r` in
+                 1.[0-5].*) gl_use_threads=no ;;
+                 *)         gl_use_threads=yes ;;
+               esac
+               ;;
+                  mingw*)
+               case "$gl_use_winpthreads_default" in
+                 yes) gl_use_threads=posix ;;
+                 no)  gl_use_threads=windows ;;
+                 *)   gl_use_threads=yes ;;
+               esac
+               ;;
+         *)    gl_use_threads=yes ;;
+       esac
+     fi
+
+fi
+
+  if test "$gl_use_threads" = yes \
+     || test "$gl_use_threads" = isoc \
+     || test "$gl_use_threads" = posix \
+     || test "$gl_use_threads" = isoc+posix; then
+    # For using <threads.h> or <pthread.h>:
+
+
+  if test -z "$gl_anythreadlib_early_done"; then
+    case "$host_os" in
+      osf*)
+        # On OSF/1, the compiler needs the flag -D_REENTRANT so that it
+        # groks <pthread.h>. cc also understands the flag -pthread, but
+        # we don't use it because 1. gcc-2.95 doesn't understand -pthread,
+        # 2. putting a flag into CPPFLAGS that has an effect on the linker
+        # causes the AC_LINK_IFELSE test below to succeed unexpectedly,
+        # leading to wrong values of LIBTHREAD and LTLIBTHREAD.
+        CPPFLAGS="$CPPFLAGS -D_REENTRANT"
+        ;;
+    esac
+    # Some systems optimize for single-threaded programs by default, and
+    # need special flags to disable these optimizations. For example, the
+    # definition of 'errno' in <errno.h>.
+    case "$host_os" in
+      aix* | freebsd*) CPPFLAGS="$CPPFLAGS -D_THREAD_SAFE" ;;
+      solaris*) CPPFLAGS="$CPPFLAGS -D_REENTRANT" ;;
+    esac
+    gl_anythreadlib_early_done=done
+  fi
+
+  fi
+
+
+
+  # Pre-early section.
+
+
+
+
+  # Code from module absolute-header:
+  # Code from module accept:
+  # Code from module accept-tests:
+  # Code from module alignof:
+  # Code from module alignof-tests:
+  # Code from module alloca:
+  # Code from module alloca-opt:
+  # Code from module alloca-opt-tests:
+  # Code from module announce-gen:
+  # Code from module argmatch:
+  # Code from module argmatch-tests:
+  # Code from module arpa_inet:
+  # Code from module arpa_inet-tests:
+  # Code from module assert:
+  # Code from module assure:
+  # Code from module at-internal:
+  # Code from module attribute:
+  # Code from module basename-lgpl:
+  # Code from module binary-io:
+  # Code from module binary-io-tests:
+  # Code from module bind:
+  # Code from module bind-tests:
+  # Code from module bitrotate:
+  # Code from module bitrotate-tests:
+  # Code from module btowc:
+  # Code from module btowc-tests:
+  # Code from module builtin-expect:
+  # Code from module c-ctype:
+  # Code from module c-ctype-tests:
+  # Code from module c-stack:
+  # Code from module c-stack-tests:
+  # Code from module c-strcase:
+  # Code from module c-strcase-tests:
+  # Code from module c-strcaseeq:
+  # Code from module c99:
+  # Code from module calloc-gnu:
+  # Code from module calloc-gnu-tests:
+  # Code from module calloc-posix:
+  # Code from module chdir:
+  # Code from module chdir-long:
+  # Code from module chdir-tests:
+  # Code from module cloexec:
+  # Code from module cloexec-tests:
+  # Code from module close:
+  # Code from module close-stream:
+  # Code from module close-tests:
+  # Code from module closedir:
+  # Code from module closeout:
+  # Code from module configmake:
+  # Code from module connect:
+  # Code from module connect-tests:
+  # Code from module ctype:
+  # Code from module ctype-tests:
+  # Code from module cycle-check:
+  # Code from module d-ino:
+  # Code from module d-type:
+  # Code from module dev-ino:
+  # Code from module dfa:
+  # Code from module dfa-tests:
+  # Code from module dirent:
+  # Code from module dirent-tests:
+  # Code from module dirfd:
+  # Code from module dirname-lgpl:
+  # Code from module do-release-commit-and-tag:
+  # Code from module double-slash-root:
+  # Code from module dup:
+  # Code from module dup-tests:
+  # Code from module dup2:
+  # Code from module dup2-tests:
+  # Code from module dynarray:
+  # Code from module dynarray-tests:
+  # Code from module environ:
+  # Code from module environ-tests:
+  # Code from module errno:
+  # Code from module errno-tests:
+  # Code from module error:
+  # Code from module exclude:
+  # Code from module exclude-tests:
+  # Code from module exitfail:
+  # Code from module extensions:
+  # Code from module extern-inline:
+  # Code from module fchdir:
+  # Code from module fchdir-tests:
+  # Code from module fcntl:
+  # Code from module fcntl-h:
+  # Code from module fcntl-h-tests:
+  # Code from module fcntl-safer:
+  # Code from module fcntl-safer-tests:
+  # Code from module fcntl-tests:
+  # Code from module fd-hook:
+  # Code from module fd-safer-flag:
+  # Code from module fdl:
+  # Code from module fdopen:
+  # Code from module fdopen-tests:
+  # Code from module fdopendir:
+  # Code from module fdopendir-tests:
+  # Code from module fgetc-tests:
+  # Code from module filename:
+  # Code from module filenamecat-lgpl:
+  # Code from module flexmember:
+  # Code from module float:
+  # Code from module float-tests:
+  # Code from module fnmatch:
+  # Code from module fnmatch-h:
+  # Code from module fnmatch-h-tests:
+  # Code from module fnmatch-tests:
+  # Code from module fopen:
+  # Code from module fopen-gnu:
+  # Code from module fopen-gnu-tests:
+  # Code from module fopen-tests:
+  # Code from module fpending:
+  # Code from module fpending-tests:
+  # Code from module fpieee:
+
+  # Code from module fpucw:
+  # Code from module fputc-tests:
+  # Code from module fread-tests:
+  # Code from module free-posix:
+  # Code from module free-posix-tests:
+  # Code from module fstat:
+  # Code from module fstat-tests:
+  # Code from module fstatat:
+  # Code from module fstatat-tests:
+  # Code from module ftruncate:
+  # Code from module ftruncate-tests:
+  # Code from module fts:
+  # Code from module fwrite-tests:
+  # Code from module gendocs:
+  # Code from module getcwd-lgpl:
+  # Code from module getcwd-lgpl-tests:
+  # Code from module getdtablesize:
+  # Code from module getdtablesize-tests:
+  # Code from module getopt-gnu:
+  # Code from module getopt-gnu-tests:
+  # Code from module getopt-posix:
+  # Code from module getopt-posix-tests:
+  # Code from module getpagesize:
+  # Code from module getprogname:
+  # Code from module getprogname-tests:
+  # Code from module gettext-h:
+  # Code from module gettimeofday:
+  # Code from module gettimeofday-tests:
+  # Code from module git-version-gen:
+  # Code from module gitlog-to-changelog:
+  # Code from module gnu-web-doc-update:
+  # Code from module gnumakefile:
+  # Code from module gnupload:
+  # Code from module gperf:
+  # Code from module hard-locale:
+  # Code from module hard-locale-tests:
+  # Code from module hash:
+  # Code from module hash-pjw:
+  # Code from module hash-tests:
+  # Code from module havelib:
+  # Code from module host-cpu-c-abi:
+  # Code from module i-ring:
+  # Code from module i-ring-tests:
+  # Code from module ialloc:
+  # Code from module iconv:
+  # Code from module iconv-h:
+  # Code from module iconv-h-tests:
+  # Code from module iconv-tests:
+  # Code from module iconv_open:
+  # Code from module idx:
+  # Code from module ignore-value:
+  # Code from module ignore-value-tests:
+  # Code from module include_next:
+  # Code from module inet_pton:
+  # Code from module inet_pton-tests:
+  # Code from module inline:
+  # Code from module intprops:
+  # Code from module intprops-tests:
+  # Code from module inttostr:
+  # Code from module inttostr-tests:
+  # Code from module inttypes:
+  # Code from module inttypes-incomplete:
+  # Code from module inttypes-tests:
+  # Code from module ioctl:
+  # Code from module ioctl-tests:
+  # Code from module isatty:
+  # Code from module isatty-tests:
+  # Code from module isblank:
+  # Code from module isblank-tests:
+  # Code from module iswblank:
+  # Code from module iswblank-tests:
+  # Code from module iswctype:
+  # Code from module iswdigit:
+  # Code from module iswdigit-tests:
+  # Code from module iswxdigit:
+  # Code from module iswxdigit-tests:
+  # Code from module langinfo:
+  # Code from module langinfo-tests:
+  # Code from module largefile:
+
+
+  # Code from module libc-config:
+  # Code from module limits-h:
+  # Code from module limits-h-tests:
+  # Code from module listen:
+  # Code from module listen-tests:
+  # Code from module localcharset:
+  # Code from module localcharset-tests:
+  # Code from module locale:
+  # Code from module locale-tests:
+  # Code from module localeconv:
+  # Code from module localeconv-tests:
+  # Code from module localename:
+  # Code from module localename-tests:
+  # Code from module lock:
+  # Code from module lseek:
+  # Code from module lseek-tests:
+  # Code from module lstat:
+  # Code from module lstat-tests:
+  # Code from module maintainer-makefile:
+  # Code from module malloc-gnu:
+  # Code from module malloc-gnu-tests:
+  # Code from module malloc-posix:
+  # Code from module malloca:
+  # Code from module malloca-tests:
+  # Code from module manywarnings:
+  # Code from module mbchar:
+  # Code from module mbiter:
+  # Code from module mbrlen:
+  # Code from module mbrtowc:
+  # Code from module mbscasecmp:
+  # Code from module mbscasecmp-tests:
+  # Code from module mbsinit:
+  # Code from module mbsinit-tests:
+  # Code from module mbslen:
+  # Code from module mbsrtowcs:
+  # Code from module mbsrtowcs-tests:
+  # Code from module mbsstr:
+  # Code from module mbsstr-tests:
+  # Code from module mbtowc:
+  # Code from module mbuiter:
+  # Code from module memchr:
+  # Code from module memchr-tests:
+  # Code from module memchr2:
+  # Code from module memchr2-tests:
+  # Code from module mempcpy:
+  # Code from module memrchr:
+  # Code from module memrchr-tests:
+  # Code from module minmax:
+  # Code from module msvc-inval:
+  # Code from module msvc-nothrow:
+  # Code from module multiarch:
+  # Code from module nanosleep:
+  # Code from module nanosleep-tests:
+  # Code from module netinet_in:
+  # Code from module netinet_in-tests:
+  # Code from module nl_langinfo:
+  # Code from module nl_langinfo-tests:
+  # Code from module nocrash:
+  # Code from module obstack:
+  # Code from module open:
+  # Code from module open-tests:
+  # Code from module openat:
+  # Code from module openat-die:
+  # Code from module openat-h:
+  # Code from module openat-safer:
+  # Code from module openat-safer-tests:
+  # Code from module openat-tests:
+  # Code from module opendir:
+  # Code from module opendirat:
+  # Code from module pathmax:
+  # Code from module pathmax-tests:
+  # Code from module perl:
+  # Code from module perror:
+  # Code from module perror-tests:
+  # Code from module pipe-posix:
+  # Code from module pipe-posix-tests:
+  # Code from module propername:
+  # Code from module pthread-h:
+
+
+  if test -z "$gl_anythreadlib_early_done"; then
+    case "$host_os" in
+      osf*)
+        # On OSF/1, the compiler needs the flag -D_REENTRANT so that it
+        # groks <pthread.h>. cc also understands the flag -pthread, but
+        # we don't use it because 1. gcc-2.95 doesn't understand -pthread,
+        # 2. putting a flag into CPPFLAGS that has an effect on the linker
+        # causes the AC_LINK_IFELSE test below to succeed unexpectedly,
+        # leading to wrong values of LIBTHREAD and LTLIBTHREAD.
+        CPPFLAGS="$CPPFLAGS -D_REENTRANT"
+        ;;
+    esac
+    # Some systems optimize for single-threaded programs by default, and
+    # need special flags to disable these optimizations. For example, the
+    # definition of 'errno' in <errno.h>.
+    case "$host_os" in
+      aix* | freebsd*) CPPFLAGS="$CPPFLAGS -D_THREAD_SAFE" ;;
+      solaris*) CPPFLAGS="$CPPFLAGS -D_REENTRANT" ;;
+    esac
+    gl_anythreadlib_early_done=done
+  fi
+
+  # Code from module pthread-h-tests:
+  # Code from module pthread-thread:
+  # Code from module pthread-thread-tests:
+  # Code from module pthread_sigmask:
+  # Code from module pthread_sigmask-tests:
+  # Code from module putenv:
+  # Code from module quote:
+  # Code from module quotearg:
+  # Code from module quotearg-simple:
+  # Code from module quotearg-simple-tests:
+  # Code from module raise:
+  # Code from module raise-tests:
+  # Code from module rawmemchr:
+  # Code from module rawmemchr-tests:
+  # Code from module read:
+  # Code from module read-tests:
+  # Code from module readdir:
+  # Code from module readme-release:
+  # Code from module realloc-gnu:
+  # Code from module realloc-gnu-tests:
+  # Code from module realloc-posix:
+  # Code from module reallocarray:
+  # Code from module reallocarray-tests:
+  # Code from module regex:
+  # Code from module regex-tests:
+  # Code from module safe-read:
+  # Code from module same-inode:
+  # Code from module save-cwd:
+  # Code from module sched:
+  # Code from module sched-tests:
+  # Code from module select:
+  # Code from module select-tests:
+  # Code from module setenv:
+  # Code from module setenv-tests:
+  # Code from module setlocale:
+  # Code from module setlocale-null:
+  # Code from module setlocale-null-tests:
+  # Code from module setlocale-tests:
+  # Code from module setsockopt:
+  # Code from module setsockopt-tests:
+  # Code from module sigaction:
+  # Code from module sigaction-tests:
+  # Code from module signal-h:
+  # Code from module signal-h-tests:
+  # Code from module sigprocmask:
+  # Code from module sigprocmask-tests:
+  # Code from module sigsegv:
+  # Code from module sigsegv-tests:
+  # Code from module size_max:
+  # Code from module sleep:
+  # Code from module sleep-tests:
+  # Code from module snippet/_Noreturn:
+  # Code from module snippet/arg-nonnull:
+  # Code from module snippet/c++defs:
+  # Code from module snippet/warn-on-use:
+  # Code from module snprintf:
+  # Code from module snprintf-tests:
+  # Code from module socket:
+  # Code from module socketlib:
+  # Code from module sockets:
+  # Code from module sockets-tests:
+  # Code from module socklen:
+  # Code from module ssize_t:
+  # Code from module stat:
+  # Code from module stat-tests:
+  # Code from module stat-time:
+  # Code from module stat-time-tests:
+  # Code from module std-gnu11:
+  # Code from module stdalign:
+  # Code from module stdalign-tests:
+  # Code from module stdarg:
+
+
+
+  # Code from module stdarg-tests:
+  # Code from module stdbool:
+  # Code from module stdbool-tests:
+  # Code from module stddef:
+  # Code from module stddef-tests:
+  # Code from module stdint:
+  # Code from module stdint-tests:
+  # Code from module stdio:
+  # Code from module stdio-tests:
+  # Code from module stdlib:
+  # Code from module stdlib-tests:
+  # Code from module stpcpy:
+  # Code from module strdup-posix:
+  # Code from module streq:
+  # Code from module strerror:
+  # Code from module strerror-override:
+  # Code from module strerror-tests:
+  # Code from module strerror_r-posix:
+  # Code from module strerror_r-posix-tests:
+  # Code from module striconv:
+  # Code from module striconv-tests:
+  # Code from module string:
+  # Code from module string-tests:
+  # Code from module strnlen:
+  # Code from module strnlen-tests:
+  # Code from module strnlen1:
+  # Code from module strstr:
+  # Code from module strstr-simple:
+  # Code from module strstr-tests:
+  # Code from module strtoimax:
+  # Code from module strtoimax-tests:
+  # Code from module strtoll:
+  # Code from module strtoll-tests:
+  # Code from module strtoull:
+  # Code from module strtoull-tests:
+  # Code from module strtoumax:
+  # Code from module strtoumax-tests:
+  # Code from module symlink:
+  # Code from module symlink-tests:
+  # Code from module sys_ioctl:
+  # Code from module sys_ioctl-tests:
+  # Code from module sys_select:
+  # Code from module sys_select-tests:
+  # Code from module sys_socket:
+  # Code from module sys_socket-tests:
+  # Code from module sys_stat:
+  # Code from module sys_stat-tests:
+  # Code from module sys_time:
+  # Code from module sys_time-tests:
+  # Code from module sys_types:
+  # Code from module sys_types-tests:
+  # Code from module sys_uio:
+  # Code from module sys_uio-tests:
+  # Code from module test-framework-sh:
+  # Code from module test-framework-sh-tests:
+  # Code from module thread:
+  # Code from module thread-optim:
+  # Code from module thread-tests:
+  # Code from module threadlib:
+
+
+
+  # Code from module time:
+  # Code from module time-tests:
+  # Code from module trim:
+  # Code from module unistd:
+  # Code from module unistd-safer:
+  # Code from module unistd-safer-tests:
+  # Code from module unistd-tests:
+  # Code from module unistr/base:
+  # Code from module unistr/u8-mbtoucr:
+  # Code from module unistr/u8-mbtoucr-tests:
+  # Code from module unistr/u8-uctomb:
+  # Code from module unistr/u8-uctomb-tests:
+  # Code from module unitypes:
+  # Code from module uniwidth/base:
+  # Code from module uniwidth/width:
+  # Code from module uniwidth/width-tests:
+  # Code from module unlocked-io:
+  # Code from module unlocked-io-internal:
+  # Code from module unsetenv:
+  # Code from module unsetenv-tests:
+  # Code from module update-copyright:
+  # Code from module useless-if-before-free:
+  # Code from module vasnprintf:
+  # Code from module vasnprintf-tests:
+  # Code from module vc-list-files:
+  # Code from module vc-list-files-tests:
+  # Code from module verify:
+  # Code from module verify-tests:
+  # Code from module version-etc:
+  # Code from module version-etc-fsf:
+  # Code from module version-etc-tests:
+  # Code from module warnings:
+  # Code from module wchar:
+  # Code from module wchar-tests:
+  # Code from module wcrtomb:
+  # Code from module wcrtomb-tests:
+  # Code from module wctob:
+  # Code from module wctomb:
+  # Code from module wctype-h:
+  # Code from module wctype-h-tests:
+  # Code from module wcwidth:
+  # Code from module wcwidth-tests:
+  # Code from module windows-mutex:
+  # Code from module windows-once:
+  # Code from module windows-recmutex:
+  # Code from module windows-rwlock:
+  # Code from module windows-stat-inodes:
+  # Code from module windows-stat-override:
+  # Code from module windows-thread:
+  # Code from module windows-tls:
+  # Code from module wmemchr:
+  # Code from module wmempcpy:
+  # Code from module xalloc:
+  # Code from module xalloc-die:
+  # Code from module xalloc-die-tests:
+  # Code from module xalloc-oversized:
+  # Code from module xbinary-io:
+  # Code from module xsize:
+  # Code from module xstriconv:
+  # Code from module xstrtoimax:
+  # Code from module xstrtoimax-tests:
+  # Code from module xstrtol:
+  # Code from module xstrtol-error:
+  # Code from module xstrtol-tests:
+
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}ranlib", so it can be a program name with args.
+set dummy ${ac_tool_prefix}ranlib; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_RANLIB+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$RANLIB"; then
+  ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_RANLIB="${ac_tool_prefix}ranlib"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+RANLIB=$ac_cv_prog_RANLIB
+if test -n "$RANLIB"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $RANLIB" >&5
+printf "%s\n" "$RANLIB" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_RANLIB"; then
+  ac_ct_RANLIB=$RANLIB
+  # Extract the first word of "ranlib", so it can be a program name with args.
+set dummy ranlib; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_RANLIB+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$ac_ct_RANLIB"; then
+  ac_cv_prog_ac_ct_RANLIB="$ac_ct_RANLIB" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_RANLIB="ranlib"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_RANLIB=$ac_cv_prog_ac_ct_RANLIB
+if test -n "$ac_ct_RANLIB"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_RANLIB" >&5
+printf "%s\n" "$ac_ct_RANLIB" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+  if test "x$ac_ct_RANLIB" = x; then
+    RANLIB=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    RANLIB=$ac_ct_RANLIB
+  fi
+else
+  RANLIB="$ac_cv_prog_RANLIB"
+fi
+
+
+
+
+
+
+
+
+if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
+	if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}pkg-config", so it can be a program name with args.
+set dummy ${ac_tool_prefix}pkg-config; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_path_PKG_CONFIG+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  case $PKG_CONFIG in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_PKG_CONFIG="$PKG_CONFIG" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_path_PKG_CONFIG="$as_dir$ac_word$ac_exec_ext"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+PKG_CONFIG=$ac_cv_path_PKG_CONFIG
+if test -n "$PKG_CONFIG"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PKG_CONFIG" >&5
+printf "%s\n" "$PKG_CONFIG" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_path_PKG_CONFIG"; then
+  ac_pt_PKG_CONFIG=$PKG_CONFIG
+  # Extract the first word of "pkg-config", so it can be a program name with args.
+set dummy pkg-config; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_path_ac_pt_PKG_CONFIG+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  case $ac_pt_PKG_CONFIG in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_ac_pt_PKG_CONFIG="$ac_pt_PKG_CONFIG" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_path_ac_pt_PKG_CONFIG="$as_dir$ac_word$ac_exec_ext"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+ac_pt_PKG_CONFIG=$ac_cv_path_ac_pt_PKG_CONFIG
+if test -n "$ac_pt_PKG_CONFIG"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_pt_PKG_CONFIG" >&5
+printf "%s\n" "$ac_pt_PKG_CONFIG" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+  if test "x$ac_pt_PKG_CONFIG" = x; then
+    PKG_CONFIG=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    PKG_CONFIG=$ac_pt_PKG_CONFIG
+  fi
+else
+  PKG_CONFIG="$ac_cv_path_PKG_CONFIG"
+fi
+
+fi
+if test -n "$PKG_CONFIG"; then
+	_pkg_min_version=0.9.0
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking pkg-config is at least version $_pkg_min_version" >&5
+printf %s "checking pkg-config is at least version $_pkg_min_version... " >&6; }
+	if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+	else
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+		PKG_CONFIG=""
+	fi
+fi
+
+# grep never invokes mbrtowc or mbrlen on empty input,
+# so don't worry about this common bug,
+# as working around it would merely slow grep down.
+gl_cv_func_mbrtowc_empty_input='assume yes'
+
+ac_fn_c_check_type "$LINENO" "size_t" "ac_cv_type_size_t" "$ac_includes_default"
+if test "x$ac_cv_type_size_t" = xyes
+then :
+
+else $as_nop
+
+printf "%s\n" "#define size_t unsigned int" >>confdefs.h
+
+fi
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for an ANSI C-conforming const" >&5
+printf %s "checking for an ANSI C-conforming const... " >&6; }
+if test ${ac_cv_c_const+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+#ifndef __cplusplus
+  /* Ultrix mips cc rejects this sort of thing.  */
+  typedef int charset[2];
+  const charset cs = { 0, 0 };
+  /* SunOS 4.1.1 cc rejects this.  */
+  char const *const *pcpcc;
+  char **ppc;
+  /* NEC SVR4.0.2 mips cc rejects this.  */
+  struct point {int x, y;};
+  static struct point const zero = {0,0};
+  /* IBM XL C 1.02.0.0 rejects this.
+     It does not let you subtract one const X* pointer from another in
+     an arm of an if-expression whose if-part is not a constant
+     expression */
+  const char *g = "string";
+  pcpcc = &g + (g ? g-g : 0);
+  /* HPUX 7.0 cc rejects these. */
+  ++pcpcc;
+  ppc = (char**) pcpcc;
+  pcpcc = (char const *const *) ppc;
+  { /* SCO 3.2v4 cc rejects this sort of thing.  */
+    char tx;
+    char *t = &tx;
+    char const *s = 0 ? (char *) 0 : (char const *) 0;
+
+    *t++ = 0;
+    if (s) return 0;
+  }
+  { /* Someone thinks the Sun supposedly-ANSI compiler will reject this.  */
+    int x[] = {25, 17};
+    const int *foo = &x[0];
+    ++foo;
+  }
+  { /* Sun SC1.0 ANSI compiler rejects this -- but not the above. */
+    typedef const int *iptr;
+    iptr p = 0;
+    ++p;
+  }
+  { /* IBM XL C 1.02.0.0 rejects this sort of thing, saying
+       "k.c", line 2.27: 1506-025 (S) Operand must be a modifiable lvalue. */
+    struct s { int j; const int *ap[3]; } bx;
+    struct s *b = &bx; b->j = 5;
+  }
+  { /* ULTRIX-32 V3.1 (Rev 9) vcc rejects this */
+    const int foo = 10;
+    if (!foo) return 0;
+  }
+  return !cs[0] && !zero.x;
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_c_const=yes
+else $as_nop
+  ac_cv_c_const=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_const" >&5
+printf "%s\n" "$ac_cv_c_const" >&6; }
+if test $ac_cv_c_const = no; then
+
+printf "%s\n" "#define const /**/" >>confdefs.h
+
+fi
+
+
+
+
+
+
+
+
+
+                        # Check whether --enable-cross-guesses was given.
+if test ${enable_cross_guesses+y}
+then :
+  enableval=$enable_cross_guesses; if test "x$enableval" != xconservative && test "x$enableval" != xrisky; then
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: invalid argument supplied to --enable-cross-guesses" >&5
+printf "%s\n" "$as_me: WARNING: invalid argument supplied to --enable-cross-guesses" >&2;}
+       enableval=conservative
+     fi
+     gl_cross_guesses="$enableval"
+else $as_nop
+  gl_cross_guesses=conservative
+fi
+
+  if test $gl_cross_guesses = risky; then
+    gl_cross_guess_normal="guessing yes"
+    gl_cross_guess_inverted="guessing no"
+  else
+    gl_cross_guess_normal="guessing no"
+    gl_cross_guess_inverted="guessing yes"
+  fi
+          LIBC_FATAL_STDERR_=1
+  export LIBC_FATAL_STDERR_
+
+
+# The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
+# for constant arguments.  Useless!
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working alloca.h" >&5
+printf %s "checking for working alloca.h... " >&6; }
+if test ${ac_cv_working_alloca_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <alloca.h>
+int
+main (void)
+{
+char *p = (char *) alloca (2 * sizeof (int));
+			  if (p) return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_working_alloca_h=yes
+else $as_nop
+  ac_cv_working_alloca_h=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_working_alloca_h" >&5
+printf "%s\n" "$ac_cv_working_alloca_h" >&6; }
+if test $ac_cv_working_alloca_h = yes; then
+
+printf "%s\n" "#define HAVE_ALLOCA_H 1" >>confdefs.h
+
+fi
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for alloca" >&5
+printf %s "checking for alloca... " >&6; }
+if test ${ac_cv_func_alloca_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test $ac_cv_working_alloca_h = yes; then
+  ac_cv_func_alloca_works=yes
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdlib.h>
+#include <stddef.h>
+#ifndef alloca
+# ifdef __GNUC__
+#  define alloca __builtin_alloca
+# elif defined _MSC_VER
+#  include <malloc.h>
+#  define alloca _alloca
+# else
+#  ifdef  __cplusplus
+extern "C"
+#  endif
+void *alloca (size_t);
+# endif
+#endif
+
+int
+main (void)
+{
+char *p = (char *) alloca (1);
+				    if (p) return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_func_alloca_works=yes
+else $as_nop
+  ac_cv_func_alloca_works=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_alloca_works" >&5
+printf "%s\n" "$ac_cv_func_alloca_works" >&6; }
+fi
+
+if test $ac_cv_func_alloca_works = yes; then
+
+printf "%s\n" "#define HAVE_ALLOCA 1" >>confdefs.h
+
+else
+  # The SVR3 libPW and SVR4 libucb both contain incompatible functions
+# that cause trouble.  Some versions do not even contain alloca or
+# contain a buggy version.  If you still want to use their alloca,
+# use ar to extract alloca.o from them instead of compiling alloca.c.
+
+
+
+
+
+ALLOCA=\${LIBOBJDIR}alloca.$ac_objext
+
+printf "%s\n" "#define C_ALLOCA 1" >>confdefs.h
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking stack direction for C alloca" >&5
+printf %s "checking stack direction for C alloca... " >&6; }
+if test ${ac_cv_c_stack_direction+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  ac_cv_c_stack_direction=0
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+int
+find_stack_direction (int *addr, int depth)
+{
+  int dir, dummy = 0;
+  if (! addr)
+    addr = &dummy;
+  *addr = addr < &dummy ? 1 : addr == &dummy ? 0 : -1;
+  dir = depth ? find_stack_direction (addr, depth - 1) : 0;
+  return dir + dummy;
+}
+
+int
+main (int argc, char **argv)
+{
+  return find_stack_direction (0, argc + !argv + 20) < 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  ac_cv_c_stack_direction=1
+else $as_nop
+  ac_cv_c_stack_direction=-1
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_stack_direction" >&5
+printf "%s\n" "$ac_cv_c_stack_direction" >&6; }
+printf "%s\n" "#define STACK_DIRECTION $ac_cv_c_stack_direction" >>confdefs.h
+
+
+fi
+
+
+    HAVE_BTOWC=1;
+  HAVE_MBSINIT=1;
+  HAVE_MBRTOWC=1;
+  HAVE_MBRLEN=1;
+  HAVE_MBSRTOWCS=1;
+  HAVE_MBSNRTOWCS=1;
+  HAVE_WCRTOMB=1;
+  HAVE_WCSRTOMBS=1;
+  HAVE_WCSNRTOMBS=1;
+  HAVE_WMEMCHR=1;
+  HAVE_WMEMCMP=1;
+  HAVE_WMEMCPY=1;
+  HAVE_WMEMMOVE=1;
+  HAVE_WMEMPCPY=1;
+  HAVE_WMEMSET=1;
+  HAVE_WCSLEN=1;
+  HAVE_WCSNLEN=1;
+  HAVE_WCSCPY=1;
+  HAVE_WCPCPY=1;
+  HAVE_WCSNCPY=1;
+  HAVE_WCPNCPY=1;
+  HAVE_WCSCAT=1;
+  HAVE_WCSNCAT=1;
+  HAVE_WCSCMP=1;
+  HAVE_WCSNCMP=1;
+  HAVE_WCSCASECMP=1;
+  HAVE_WCSNCASECMP=1;
+  HAVE_WCSCOLL=1;
+  HAVE_WCSXFRM=1;
+  HAVE_WCSDUP=1;
+  HAVE_WCSCHR=1;
+  HAVE_WCSRCHR=1;
+  HAVE_WCSCSPN=1;
+  HAVE_WCSSPN=1;
+  HAVE_WCSPBRK=1;
+  HAVE_WCSSTR=1;
+  HAVE_WCSTOK=1;
+  HAVE_WCSWIDTH=1;
+  HAVE_WCSFTIME=1;
+  HAVE_DECL_WCTOB=1;
+  HAVE_DECL_WCSDUP=1;
+  HAVE_DECL_WCWIDTH=1;
+  REPLACE_MBSTATE_T=0;
+  REPLACE_BTOWC=0;
+  REPLACE_WCTOB=0;
+  REPLACE_MBSINIT=0;
+  REPLACE_MBRTOWC=0;
+  REPLACE_MBRLEN=0;
+  REPLACE_MBSRTOWCS=0;
+  REPLACE_MBSNRTOWCS=0;
+  REPLACE_WCRTOMB=0;
+  REPLACE_WCSRTOMBS=0;
+  REPLACE_WCSNRTOMBS=0;
+  REPLACE_WCWIDTH=0;
+  REPLACE_WCSWIDTH=0;
+  REPLACE_WCSFTIME=0;
+  REPLACE_WCSTOK=0;
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether <wchar.h> uses 'inline' correctly" >&5
+printf %s "checking whether <wchar.h> uses 'inline' correctly... " >&6; }
+if test ${gl_cv_header_wchar_h_correct_inline+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_cv_header_wchar_h_correct_inline=yes
+     case "$host_os" in
+       *-gnu* | gnu*)
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+
+             #define wcstod renamed_wcstod
+             #include <wchar.h>
+             extern int zero (void);
+             int main () { return zero(); }
+
+_ACEOF
+                                                      save_ac_compile="$ac_compile"
+         ac_compile=`echo "$save_ac_compile" | sed s/conftest/conftest1/`
+         if echo '#include "conftest.c"' >conftest1.c \
+            && { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+           cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+
+               #define wcstod renamed_wcstod
+               #include <wchar.h>
+               int zero (void) { return 0; }
+
+_ACEOF
+                      ac_compile=`echo "$save_ac_compile" | sed s/conftest/conftest2/`
+           if echo '#include "conftest.c"' >conftest2.c \
+              && { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+             if $CC -o conftest$ac_exeext $CFLAGS $LDFLAGS conftest1.$ac_objext conftest2.$ac_objext $LIBS >&5 2>&1; then
+               :
+             else
+               gl_cv_header_wchar_h_correct_inline=no
+             fi
+           fi
+         fi
+         ac_compile="$save_ac_compile"
+         rm -f conftest12.c conftest12.$ac_objext conftest$ac_exeext
+         ;;
+     esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_wchar_h_correct_inline" >&5
+printf "%s\n" "$gl_cv_header_wchar_h_correct_inline" >&6; }
+  if test $gl_cv_header_wchar_h_correct_inline = no; then
+    as_fn_error $? "<wchar.h> cannot be used with this compiler ($CC $CFLAGS $CPPFLAGS).
+This is a known interoperability problem of glibc <= 2.5 with gcc >= 4.3 in
+C99 mode. You have four options:
+  - Add the flag -fgnu89-inline to CC and reconfigure, or
+  - Fix your include files, using parts of
+    <https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=b037a293a48718af30d706c2e18c929d0e69a621>, or
+  - Use a gcc version older than 4.3, or
+  - Don't use the flags -std=c99 or -std=gnu99.
+Configuration aborted." "$LINENO" 5
+  fi
+
+ac_func=
+for ac_item in $ac_func_c_list
+do
+  if test $ac_func; then
+    ac_fn_c_check_func "$LINENO" $ac_func ac_cv_func_$ac_func
+    if eval test \"x\$ac_cv_func_$ac_func\" = xyes; then
+      echo "#define $ac_item 1" >> confdefs.h
+    fi
+    ac_func=
+  else
+    ac_func=$ac_item
+  fi
+done
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for nl_langinfo and CODESET" >&5
+printf %s "checking for nl_langinfo and CODESET... " >&6; }
+if test ${am_cv_langinfo_codeset+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <langinfo.h>
+int
+main (void)
+{
+char* cs = nl_langinfo(CODESET); return !cs;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  am_cv_langinfo_codeset=yes
+else $as_nop
+  am_cv_langinfo_codeset=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_langinfo_codeset" >&5
+printf "%s\n" "$am_cv_langinfo_codeset" >&6; }
+  if test $am_cv_langinfo_codeset = yes; then
+
+printf "%s\n" "#define HAVE_LANGINFO_CODESET 1" >>confdefs.h
+
+  fi
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a traditional french locale" >&5
+printf %s "checking for a traditional french locale... " >&6; }
+if test ${gt_cv_locale_fr+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is only
+     one byte long. This excludes the UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 3 || buf[2] != 'v') return 1;
+# if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+# endif
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the native Windows locale name.
+          if (LC_ALL=French_France.1252 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=French_France.1252
+          else
+            # None found.
+            gt_cv_locale_fr=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.ISO-8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr=fr_FR.ISO-8859-1
+            else
+              # Test for the AIX, OSF/1, FreeBSD, NetBSD, OpenBSD locale name.
+              if (LC_ALL=fr_FR.ISO8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr=fr_FR.ISO8859-1
+              else
+                # Test for the HP-UX locale name.
+                if (LC_ALL=fr_FR.iso88591 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_fr=fr_FR.iso88591
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=fr LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_fr=fr
+                  else
+                    # None found.
+                    gt_cv_locale_fr=none
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr" >&5
+printf "%s\n" "$gt_cv_locale_fr" >&6; }
+  LOCALE_FR=$gt_cv_locale_fr
+
+
+
+
+  GL_GNULIB_BTOWC=0
+
+
+
+  GL_GNULIB_WCTOB=0
+
+
+
+  GL_GNULIB_MBSINIT=0
+
+
+
+  GL_GNULIB_MBRTOWC=0
+
+
+
+  GL_GNULIB_MBRLEN=0
+
+
+
+  GL_GNULIB_MBSRTOWCS=0
+
+
+
+  GL_GNULIB_MBSNRTOWCS=0
+
+
+
+  GL_GNULIB_WCRTOMB=0
+
+
+
+  GL_GNULIB_WCSRTOMBS=0
+
+
+
+  GL_GNULIB_WCSNRTOMBS=0
+
+
+
+  GL_GNULIB_WCWIDTH=0
+
+
+
+  GL_GNULIB_WMEMCHR=0
+
+
+
+  GL_GNULIB_WMEMCMP=0
+
+
+
+  GL_GNULIB_WMEMCPY=0
+
+
+
+  GL_GNULIB_WMEMMOVE=0
+
+
+
+  GL_GNULIB_WMEMPCPY=0
+
+
+
+  GL_GNULIB_WMEMSET=0
+
+
+
+  GL_GNULIB_WCSLEN=0
+
+
+
+  GL_GNULIB_WCSNLEN=0
+
+
+
+  GL_GNULIB_WCSCPY=0
+
+
+
+  GL_GNULIB_WCPCPY=0
+
+
+
+  GL_GNULIB_WCSNCPY=0
+
+
+
+  GL_GNULIB_WCPNCPY=0
+
+
+
+  GL_GNULIB_WCSCAT=0
+
+
+
+  GL_GNULIB_WCSNCAT=0
+
+
+
+  GL_GNULIB_WCSCMP=0
+
+
+
+  GL_GNULIB_WCSNCMP=0
+
+
+
+  GL_GNULIB_WCSCASECMP=0
+
+
+
+  GL_GNULIB_WCSNCASECMP=0
+
+
+
+  GL_GNULIB_WCSCOLL=0
+
+
+
+  GL_GNULIB_WCSXFRM=0
+
+
+
+  GL_GNULIB_WCSDUP=0
+
+
+
+  GL_GNULIB_WCSCHR=0
+
+
+
+  GL_GNULIB_WCSRCHR=0
+
+
+
+  GL_GNULIB_WCSCSPN=0
+
+
+
+  GL_GNULIB_WCSSPN=0
+
+
+
+  GL_GNULIB_WCSPBRK=0
+
+
+
+  GL_GNULIB_WCSSTR=0
+
+
+
+  GL_GNULIB_WCSTOK=0
+
+
+
+  GL_GNULIB_WCSWIDTH=0
+
+
+
+  GL_GNULIB_WCSFTIME=0
+
+
+
+  GL_GNULIB_MDA_WCSDUP=1
+
+
+
+
+    HAVE__EXIT=1;
+  HAVE_ALIGNED_ALLOC=1;
+  HAVE_ATOLL=1;
+  HAVE_CANONICALIZE_FILE_NAME=1;
+  HAVE_DECL_ECVT=1;
+  HAVE_DECL_FCVT=1;
+  HAVE_DECL_GCVT=1;
+  HAVE_DECL_GETLOADAVG=1;
+  HAVE_GETSUBOPT=1;
+  HAVE_GRANTPT=1;
+  HAVE_INITSTATE=1;
+  HAVE_DECL_INITSTATE=1;
+  HAVE_MBTOWC=1;
+  HAVE_MKDTEMP=1;
+  HAVE_MKOSTEMP=1;
+  HAVE_MKOSTEMPS=1;
+  HAVE_MKSTEMP=1;
+  HAVE_MKSTEMPS=1;
+  HAVE_POSIX_MEMALIGN=1;
+  HAVE_POSIX_OPENPT=1;
+  HAVE_PTSNAME=1;
+  HAVE_PTSNAME_R=1;
+  HAVE_QSORT_R=1;
+  HAVE_RANDOM=1;
+  HAVE_RANDOM_H=1;
+  HAVE_RANDOM_R=1;
+  HAVE_REALLOCARRAY=1;
+  HAVE_REALPATH=1;
+  HAVE_RPMATCH=1;
+  HAVE_SECURE_GETENV=1;
+  HAVE_SETENV=1;
+  HAVE_DECL_SETENV=1;
+  HAVE_SETSTATE=1;
+  HAVE_DECL_SETSTATE=1;
+  HAVE_STRTOD=1;
+  HAVE_STRTOL=1;
+  HAVE_STRTOLD=1;
+  HAVE_STRTOLL=1;
+  HAVE_STRTOUL=1;
+  HAVE_STRTOULL=1;
+  HAVE_STRUCT_RANDOM_DATA=1;
+  HAVE_SYS_LOADAVG_H=0;
+  HAVE_UNLOCKPT=1;
+  HAVE_DECL_UNSETENV=1;
+  REPLACE_ALIGNED_ALLOC=0;
+  REPLACE_CALLOC=0;
+  REPLACE_CANONICALIZE_FILE_NAME=0;
+  REPLACE_FREE=0;
+  REPLACE_INITSTATE=0;
+  REPLACE_MALLOC=0;
+  REPLACE_MBTOWC=0;
+  REPLACE_MKSTEMP=0;
+  REPLACE_POSIX_MEMALIGN=0;
+  REPLACE_PTSNAME=0;
+  REPLACE_PTSNAME_R=0;
+  REPLACE_PUTENV=0;
+  REPLACE_QSORT_R=0;
+  REPLACE_RANDOM=0;
+  REPLACE_RANDOM_R=0;
+  REPLACE_REALLOC=0;
+  REPLACE_REALLOCARRAY=0;
+  REPLACE_REALPATH=0;
+  REPLACE_SETENV=0;
+  REPLACE_SETSTATE=0;
+  REPLACE_STRTOD=0;
+  REPLACE_STRTOL=0;
+  REPLACE_STRTOLD=0;
+  REPLACE_STRTOLL=0;
+  REPLACE_STRTOUL=0;
+  REPLACE_STRTOULL=0;
+  REPLACE_UNSETENV=0;
+  REPLACE_WCTOMB=0;
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether malloc is ptrdiff_t safe" >&5
+printf %s "checking whether malloc is ptrdiff_t safe... " >&6; }
+if test ${gl_cv_malloc_ptrdiff+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdint.h>
+
+int
+main (void)
+{
+/* 64-bit ptrdiff_t is so wide that no practical platform
+               can exceed it.  */
+            #define WIDE_PTRDIFF (PTRDIFF_MAX >> 31 >> 31 != 0)
+
+            /* On rare machines where size_t fits in ptrdiff_t there
+               is no problem.  */
+            #define NARROW_SIZE (SIZE_MAX <= PTRDIFF_MAX)
+
+            /* glibc 2.30 and later malloc refuses to exceed ptrdiff_t
+               bounds even on 32-bit platforms.  We don't know which
+               non-glibc systems are safe.  */
+            #define KNOWN_SAFE (2 < __GLIBC__ + (30 <= __GLIBC_MINOR__))
+
+            #if WIDE_PTRDIFF || NARROW_SIZE || KNOWN_SAFE
+              return 0;
+            #else
+              #error "malloc might not be ptrdiff_t safe"
+              syntax error
+            #endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_malloc_ptrdiff=yes
+else $as_nop
+  gl_cv_malloc_ptrdiff=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_malloc_ptrdiff" >&5
+printf "%s\n" "$gl_cv_malloc_ptrdiff" >&6; }
+
+
+
+
+  test "$gl_cv_malloc_ptrdiff" = yes || REPLACE_MALLOC=1
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether malloc, realloc, calloc set errno on failure" >&5
+printf %s "checking whether malloc, realloc, calloc set errno on failure... " >&6; }
+if test ${gl_cv_func_malloc_posix+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                                    case "$host_os" in
+        mingw*)
+          gl_cv_func_malloc_posix=no ;;
+        irix* | solaris*)
+
+          gl_cv_func_malloc_posix=no ;;
+        *)
+          gl_cv_func_malloc_posix=yes ;;
+      esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_malloc_posix" >&5
+printf "%s\n" "$gl_cv_func_malloc_posix" >&6; }
+
+
+
+
+
+  if test "$gl_cv_func_malloc_posix" = yes; then
+
+printf "%s\n" "#define HAVE_MALLOC_POSIX 1" >>confdefs.h
+
+  else
+    REPLACE_MALLOC=1
+  fi
+
+
+
+
+  if test $REPLACE_MALLOC = 1; then
+    REPLACE_CALLOC=1
+  fi
+
+
+
+  GL_GNULIB__EXIT=0
+
+
+
+  GL_GNULIB_ALIGNED_ALLOC=0
+
+
+
+  GL_GNULIB_ATOLL=0
+
+
+
+  GL_GNULIB_CALLOC_POSIX=0
+
+
+
+  GL_GNULIB_CANONICALIZE_FILE_NAME=0
+
+
+
+  GL_GNULIB_FREE_POSIX=0
+
+
+
+  GL_GNULIB_GETLOADAVG=0
+
+
+
+  GL_GNULIB_GETSUBOPT=0
+
+
+
+  GL_GNULIB_GRANTPT=0
+
+
+
+  GL_GNULIB_MALLOC_POSIX=0
+
+
+
+  GL_GNULIB_MBTOWC=0
+
+
+
+  GL_GNULIB_MKDTEMP=0
+
+
+
+  GL_GNULIB_MKOSTEMP=0
+
+
+
+  GL_GNULIB_MKOSTEMPS=0
+
+
+
+  GL_GNULIB_MKSTEMP=0
+
+
+
+  GL_GNULIB_MKSTEMPS=0
+
+
+
+  GL_GNULIB_POSIX_MEMALIGN=0
+
+
+
+  GL_GNULIB_POSIX_OPENPT=0
+
+
+
+  GL_GNULIB_PTSNAME=0
+
+
+
+  GL_GNULIB_PTSNAME_R=0
+
+
+
+  GL_GNULIB_PUTENV=0
+
+
+
+  GL_GNULIB_QSORT_R=0
+
+
+
+  GL_GNULIB_RANDOM=0
+
+
+
+  GL_GNULIB_RANDOM_R=0
+
+
+
+  GL_GNULIB_REALLOCARRAY=0
+
+
+
+  GL_GNULIB_REALLOC_POSIX=0
+
+
+
+  GL_GNULIB_REALPATH=0
+
+
+
+  GL_GNULIB_RPMATCH=0
+
+
+
+  GL_GNULIB_SECURE_GETENV=0
+
+
+
+  GL_GNULIB_SETENV=0
+
+
+
+  GL_GNULIB_STRTOD=0
+
+
+
+  GL_GNULIB_STRTOL=0
+
+
+
+  GL_GNULIB_STRTOLD=0
+
+
+
+  GL_GNULIB_STRTOLL=0
+
+
+
+  GL_GNULIB_STRTOUL=0
+
+
+
+  GL_GNULIB_STRTOULL=0
+
+
+
+  GL_GNULIB_SYSTEM_POSIX=0
+
+
+
+  GL_GNULIB_UNLOCKPT=0
+
+
+
+  GL_GNULIB_UNSETENV=0
+
+
+
+  GL_GNULIB_WCTOMB=0
+
+
+
+  GL_GNULIB_MDA_ECVT=1
+
+
+
+  GL_GNULIB_MDA_FCVT=1
+
+
+
+  GL_GNULIB_MDA_GCVT=1
+
+
+
+  GL_GNULIB_MDA_MKTEMP=1
+
+
+
+  GL_GNULIB_MDA_PUTENV=1
+
+
+
+
+
+  GL_GNULIB_ACCESS=0
+
+
+
+  GL_GNULIB_CHDIR=0
+
+
+
+  GL_GNULIB_CHOWN=0
+
+
+
+  GL_GNULIB_CLOSE=0
+
+
+
+  GL_GNULIB_COPY_FILE_RANGE=0
+
+
+
+  GL_GNULIB_DUP=0
+
+
+
+  GL_GNULIB_DUP2=0
+
+
+
+  GL_GNULIB_DUP3=0
+
+
+
+  GL_GNULIB_ENVIRON=0
+
+
+
+  GL_GNULIB_EUIDACCESS=0
+
+
+
+  GL_GNULIB_EXECL=0
+
+
+
+  GL_GNULIB_EXECLE=0
+
+
+
+  GL_GNULIB_EXECLP=0
+
+
+
+  GL_GNULIB_EXECV=0
+
+
+
+  GL_GNULIB_EXECVE=0
+
+
+
+  GL_GNULIB_EXECVP=0
+
+
+
+  GL_GNULIB_EXECVPE=0
+
+
+
+  GL_GNULIB_FACCESSAT=0
+
+
+
+  GL_GNULIB_FCHDIR=0
+
+
+
+  GL_GNULIB_FCHOWNAT=0
+
+
+
+  GL_GNULIB_FDATASYNC=0
+
+
+
+  GL_GNULIB_FSYNC=0
+
+
+
+  GL_GNULIB_FTRUNCATE=0
+
+
+
+  GL_GNULIB_GETCWD=0
+
+
+
+  GL_GNULIB_GETDOMAINNAME=0
+
+
+
+  GL_GNULIB_GETDTABLESIZE=0
+
+
+
+  GL_GNULIB_GETENTROPY=0
+
+
+
+  GL_GNULIB_GETGROUPS=0
+
+
+
+  GL_GNULIB_GETHOSTNAME=0
+
+
+
+  GL_GNULIB_GETLOGIN=0
+
+
+
+  GL_GNULIB_GETLOGIN_R=0
+
+
+
+  GL_GNULIB_GETOPT_POSIX=0
+
+
+
+  GL_GNULIB_GETPAGESIZE=0
+
+
+
+  GL_GNULIB_GETPASS=0
+
+
+
+  GL_GNULIB_GETUSERSHELL=0
+
+
+
+  GL_GNULIB_GROUP_MEMBER=0
+
+
+
+  GL_GNULIB_ISATTY=0
+
+
+
+  GL_GNULIB_LCHOWN=0
+
+
+
+  GL_GNULIB_LINK=0
+
+
+
+  GL_GNULIB_LINKAT=0
+
+
+
+  GL_GNULIB_LSEEK=0
+
+
+
+  GL_GNULIB_PIPE=0
+
+
+
+  GL_GNULIB_PIPE2=0
+
+
+
+  GL_GNULIB_PREAD=0
+
+
+
+  GL_GNULIB_PWRITE=0
+
+
+
+  GL_GNULIB_READ=0
+
+
+
+  GL_GNULIB_READLINK=0
+
+
+
+  GL_GNULIB_READLINKAT=0
+
+
+
+  GL_GNULIB_RMDIR=0
+
+
+
+  GL_GNULIB_SETHOSTNAME=0
+
+
+
+  GL_GNULIB_SLEEP=0
+
+
+
+  GL_GNULIB_SYMLINK=0
+
+
+
+  GL_GNULIB_SYMLINKAT=0
+
+
+
+  GL_GNULIB_TRUNCATE=0
+
+
+
+  GL_GNULIB_TTYNAME_R=0
+
+
+
+  GL_GNULIB_UNISTD_H_GETOPT=0
+
+
+
+  GL_GNULIB_UNISTD_H_NONBLOCKING=0
+
+
+
+  GL_GNULIB_UNISTD_H_SIGPIPE=0
+
+
+
+  GL_GNULIB_UNLINK=0
+
+
+
+  GL_GNULIB_UNLINKAT=0
+
+
+
+  GL_GNULIB_USLEEP=0
+
+
+
+  GL_GNULIB_WRITE=0
+
+
+
+  GL_GNULIB_MDA_ACCESS=1
+
+
+
+  GL_GNULIB_MDA_CHDIR=1
+
+
+
+  GL_GNULIB_MDA_CLOSE=1
+
+
+
+  GL_GNULIB_MDA_DUP=1
+
+
+
+  GL_GNULIB_MDA_DUP2=1
+
+
+
+  GL_GNULIB_MDA_EXECL=1
+
+
+
+  GL_GNULIB_MDA_EXECLE=1
+
+
+
+  GL_GNULIB_MDA_EXECLP=1
+
+
+
+  GL_GNULIB_MDA_EXECV=1
+
+
+
+  GL_GNULIB_MDA_EXECVE=1
+
+
+
+  GL_GNULIB_MDA_EXECVP=1
+
+
+
+  GL_GNULIB_MDA_EXECVPE=1
+
+
+
+  GL_GNULIB_MDA_GETCWD=1
+
+
+
+  GL_GNULIB_MDA_GETPID=1
+
+
+
+  GL_GNULIB_MDA_ISATTY=1
+
+
+
+  GL_GNULIB_MDA_LSEEK=1
+
+
+
+  GL_GNULIB_MDA_READ=1
+
+
+
+  GL_GNULIB_MDA_RMDIR=1
+
+
+
+  GL_GNULIB_MDA_SWAB=1
+
+
+
+  GL_GNULIB_MDA_UNLINK=1
+
+
+
+  GL_GNULIB_MDA_WRITE=1
+
+
+
+
+    HAVE_CHOWN=1;
+  HAVE_COPY_FILE_RANGE=1;
+  HAVE_DUP3=1;
+  HAVE_EUIDACCESS=1;
+  HAVE_EXECVPE=1;
+  HAVE_FACCESSAT=1;
+  HAVE_FCHDIR=1;
+  HAVE_FCHOWNAT=1;
+  HAVE_FDATASYNC=1;
+  HAVE_FSYNC=1;
+  HAVE_FTRUNCATE=1;
+  HAVE_GETDTABLESIZE=1;
+  HAVE_GETENTROPY=1;
+  HAVE_GETGROUPS=1;
+  HAVE_GETHOSTNAME=1;
+  HAVE_GETLOGIN=1;
+  HAVE_GETPAGESIZE=1;
+  HAVE_GETPASS=1;
+  HAVE_GROUP_MEMBER=1;
+  HAVE_LCHOWN=1;
+  HAVE_LINK=1;
+  HAVE_LINKAT=1;
+  HAVE_PIPE=1;
+  HAVE_PIPE2=1;
+  HAVE_PREAD=1;
+  HAVE_PWRITE=1;
+  HAVE_READLINK=1;
+  HAVE_READLINKAT=1;
+  HAVE_SETHOSTNAME=1;
+  HAVE_SLEEP=1;
+  HAVE_SYMLINK=1;
+  HAVE_SYMLINKAT=1;
+  HAVE_UNLINKAT=1;
+  HAVE_USLEEP=1;
+  HAVE_DECL_ENVIRON=1;
+  HAVE_DECL_EXECVPE=1;
+  HAVE_DECL_FCHDIR=1;
+  HAVE_DECL_FDATASYNC=1;
+  HAVE_DECL_GETDOMAINNAME=1;
+  HAVE_DECL_GETLOGIN=1;
+  HAVE_DECL_GETLOGIN_R=1;
+  HAVE_DECL_GETPAGESIZE=1;
+  HAVE_DECL_GETUSERSHELL=1;
+  HAVE_DECL_SETHOSTNAME=1;
+  HAVE_DECL_TRUNCATE=1;
+  HAVE_DECL_TTYNAME_R=1;
+  HAVE_OS_H=0;
+  HAVE_SYS_PARAM_H=0;
+  REPLACE_ACCESS=0;
+  REPLACE_CHOWN=0;
+  REPLACE_CLOSE=0;
+  REPLACE_DUP=0;
+  REPLACE_DUP2=0;
+  REPLACE_EXECL=0;
+  REPLACE_EXECLE=0;
+  REPLACE_EXECLP=0;
+  REPLACE_EXECV=0;
+  REPLACE_EXECVE=0;
+  REPLACE_EXECVP=0;
+  REPLACE_EXECVPE=0;
+  REPLACE_FACCESSAT=0;
+  REPLACE_FCHOWNAT=0;
+  REPLACE_FTRUNCATE=0;
+  REPLACE_GETCWD=0;
+  REPLACE_GETDOMAINNAME=0;
+  REPLACE_GETDTABLESIZE=0;
+  REPLACE_GETLOGIN_R=0;
+  REPLACE_GETGROUPS=0;
+  REPLACE_GETPAGESIZE=0;
+  REPLACE_GETPASS=0;
+  REPLACE_ISATTY=0;
+  REPLACE_LCHOWN=0;
+  REPLACE_LINK=0;
+  REPLACE_LINKAT=0;
+  REPLACE_LSEEK=0;
+  REPLACE_PREAD=0;
+  REPLACE_PWRITE=0;
+  REPLACE_READ=0;
+  REPLACE_READLINK=0;
+  REPLACE_READLINKAT=0;
+  REPLACE_RMDIR=0;
+  REPLACE_SLEEP=0;
+  REPLACE_SYMLINK=0;
+  REPLACE_SYMLINKAT=0;
+  REPLACE_TRUNCATE=0;
+  REPLACE_TTYNAME_R=0;
+  REPLACE_UNLINK=0;
+  REPLACE_UNLINKAT=0;
+  REPLACE_USLEEP=0;
+  REPLACE_WRITE=0;
+  UNISTD_H_HAVE_SYS_RANDOM_H=0;
+  UNISTD_H_HAVE_WINSOCK2_H=0;
+  UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS=0;
+
+
+
+
+
+
+
+
+
+  if test $ac_cv_func__set_invalid_parameter_handler = yes; then
+    HAVE_MSVC_INVALID_PARAMETER_HANDLER=1
+
+printf "%s\n" "#define HAVE_MSVC_INVALID_PARAMETER_HANDLER 1" >>confdefs.h
+
+  else
+    HAVE_MSVC_INVALID_PARAMETER_HANDLER=0
+  fi
+
+
+
+    SYS_IOCTL_H_HAVE_WINSOCK2_H=0;
+  SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS=0;
+
+  REPLACE_IOCTL=0;
+
+
+
+
+    HAVE_OPENDIR=1;
+  HAVE_READDIR=1;
+  HAVE_REWINDDIR=1;
+  HAVE_CLOSEDIR=1;
+  HAVE_DECL_DIRFD=1;
+  HAVE_DECL_FDOPENDIR=1;
+  HAVE_FDOPENDIR=1;
+  HAVE_SCANDIR=1;
+  HAVE_ALPHASORT=1;
+  REPLACE_OPENDIR=0;
+  REPLACE_CLOSEDIR=0;
+  REPLACE_DIRFD=0;
+  REPLACE_FDOPENDIR=0;
+
+
+
+
+
+
+
+  GL_GNULIB_OPENDIR=0
+
+
+
+  GL_GNULIB_READDIR=0
+
+
+
+  GL_GNULIB_REWINDDIR=0
+
+
+
+  GL_GNULIB_CLOSEDIR=0
+
+
+
+  GL_GNULIB_DIRFD=0
+
+
+
+  GL_GNULIB_FDOPENDIR=0
+
+
+
+  GL_GNULIB_SCANDIR=0
+
+
+
+  GL_GNULIB_ALPHASORT=0
+
+
+
+
+    HAVE_ISBLANK=1;
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the preprocessor supports include_next" >&5
+printf %s "checking whether the preprocessor supports include_next... " >&6; }
+if test ${gl_cv_have_include_next+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  rm -rf conftestd1a conftestd1b conftestd2
+     mkdir conftestd1a conftestd1b conftestd2
+                                                  cat <<EOF > conftestd1a/conftest.h
+#define DEFINED_IN_CONFTESTD1
+#include_next <conftest.h>
+#ifdef DEFINED_IN_CONFTESTD2
+int foo;
+#else
+#error "include_next doesn't work"
+#endif
+EOF
+     cat <<EOF > conftestd1b/conftest.h
+#define DEFINED_IN_CONFTESTD1
+#include <stdio.h>
+#include_next <conftest.h>
+#ifdef DEFINED_IN_CONFTESTD2
+int foo;
+#else
+#error "include_next doesn't work"
+#endif
+EOF
+     cat <<EOF > conftestd2/conftest.h
+#ifndef DEFINED_IN_CONFTESTD1
+#error "include_next test doesn't work"
+#endif
+#define DEFINED_IN_CONFTESTD2
+EOF
+     gl_save_CPPFLAGS="$CPPFLAGS"
+     CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1b -Iconftestd2"
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <conftest.h>
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_have_include_next=yes
+else $as_nop
+  CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1a -Iconftestd2"
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <conftest.h>
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_have_include_next=buggy
+else $as_nop
+  gl_cv_have_include_next=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+     CPPFLAGS="$gl_save_CPPFLAGS"
+     rm -rf conftestd1a conftestd1b conftestd2
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_have_include_next" >&5
+printf "%s\n" "$gl_cv_have_include_next" >&6; }
+  PRAGMA_SYSTEM_HEADER=
+  if test $gl_cv_have_include_next = yes; then
+    INCLUDE_NEXT=include_next
+    INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next
+    if test -n "$GCC"; then
+      PRAGMA_SYSTEM_HEADER='#pragma GCC system_header'
+    fi
+  else
+    if test $gl_cv_have_include_next = buggy; then
+      INCLUDE_NEXT=include
+      INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next
+    else
+      INCLUDE_NEXT=include
+      INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include
+    fi
+  fi
+
+
+
+
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether source code line length is unlimited" >&5
+printf %s "checking whether source code line length is unlimited... " >&6; }
+if test ${gl_cv_source_line_length_unlimited+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#ifdef __TANDEM
+choke me
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "choke me" >/dev/null 2>&1
+then :
+  gl_cv_source_line_length_unlimited=no
+else $as_nop
+  gl_cv_source_line_length_unlimited=yes
+fi
+rm -rf conftest*
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_source_line_length_unlimited" >&5
+printf "%s\n" "$gl_cv_source_line_length_unlimited" >&6; }
+  if test $gl_cv_source_line_length_unlimited = no; then
+    PRAGMA_COLUMNS="#pragma COLUMNS 10000"
+  else
+    PRAGMA_COLUMNS=
+  fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_ctype_h='<'ctype.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <ctype.h>" >&5
+printf %s "checking absolute name of <ctype.h>... " >&6; }
+if test ${gl_cv_next_ctype_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <ctype.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'ctype.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_ctype_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_ctype_h
+           gl_cv_next_ctype_h='"'$gl_header'"'
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_ctype_h" >&5
+printf "%s\n" "$gl_cv_next_ctype_h" >&6; }
+     fi
+     NEXT_CTYPE_H=$gl_cv_next_ctype_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'ctype.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_ctype_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_CTYPE_H=$gl_next_as_first_directive
+
+
+
+
+
+
+
+
+
+
+
+  GL_GNULIB_ISBLANK=0
+
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for inline" >&5
+printf %s "checking for inline... " >&6; }
+if test ${ac_cv_c_inline+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_c_inline=no
+for ac_kw in inline __inline__ __inline; do
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifndef __cplusplus
+typedef int foo_t;
+static $ac_kw foo_t static_foo (void) {return 0; }
+$ac_kw foo_t foo (void) {return 0; }
+#endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_c_inline=$ac_kw
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+  test "$ac_cv_c_inline" != no && break
+done
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_inline" >&5
+printf "%s\n" "$ac_cv_c_inline" >&6; }
+
+case $ac_cv_c_inline in
+  inline | yes) ;;
+  *)
+    case $ac_cv_c_inline in
+      no) ac_val=;;
+      *) ac_val=$ac_cv_c_inline;;
+    esac
+    cat >>confdefs.h <<_ACEOF
+#ifndef __cplusplus
+#define inline $ac_val
+#endif
+_ACEOF
+    ;;
+esac
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_dirent_h='<'dirent.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <dirent.h>" >&5
+printf %s "checking absolute name of <dirent.h>... " >&6; }
+if test ${gl_cv_next_dirent_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_dirent_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <dirent.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'dirent.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_dirent_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_dirent_h
+           gl_cv_next_dirent_h='"'$gl_header'"'
+          else
+               gl_cv_next_dirent_h='<'dirent.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_dirent_h" >&5
+printf "%s\n" "$gl_cv_next_dirent_h" >&6; }
+     fi
+     NEXT_DIRENT_H=$gl_cv_next_dirent_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'dirent.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_dirent_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_DIRENT_H=$gl_next_as_first_directive
+
+
+
+
+  if test $ac_cv_header_dirent_h = yes; then
+    HAVE_DIRENT_H=1
+  else
+    HAVE_DIRENT_H=0
+  fi
+
+
+
+
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC options needed to detect all undeclared functions" >&5
+printf %s "checking for $CC options needed to detect all undeclared functions... " >&6; }
+if test ${ac_cv_c_undeclared_builtin_options+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_save_CFLAGS=$CFLAGS
+   ac_cv_c_undeclared_builtin_options='cannot detect'
+   for ac_arg in '' -fno-builtin; do
+     CFLAGS="$ac_save_CFLAGS $ac_arg"
+     # This test program should *not* compile successfully.
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+(void) strchr;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+
+else $as_nop
+  # This test program should compile successfully.
+        # No library function is consistently available on
+        # freestanding implementations, so test against a dummy
+        # declaration.  Include always-available headers on the
+        # off chance that they somehow elicit warnings.
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <float.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stddef.h>
+extern void ac_decl (int, char *);
+
+int
+main (void)
+{
+(void) ac_decl (0, (char *) 0);
+  (void) ac_decl;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  if test x"$ac_arg" = x
+then :
+  ac_cv_c_undeclared_builtin_options='none needed'
+else $as_nop
+  ac_cv_c_undeclared_builtin_options=$ac_arg
+fi
+          break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+    done
+    CFLAGS=$ac_save_CFLAGS
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_undeclared_builtin_options" >&5
+printf "%s\n" "$ac_cv_c_undeclared_builtin_options" >&6; }
+  case $ac_cv_c_undeclared_builtin_options in #(
+  'cannot detect') :
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot make $CC report undeclared builtins
+See \`config.log' for more details" "$LINENO" 5; } ;; #(
+  'none needed') :
+    ac_c_undeclared_builtin_options='' ;; #(
+  *) :
+    ac_c_undeclared_builtin_options=$ac_cv_c_undeclared_builtin_options ;;
+esac
+
+gl_mda_defines='
+#if defined _WIN32 && !defined __CYGWIN__
+#define access    _access
+#define chdir     _chdir
+#define chmod     _chmod
+#define close     _close
+#define creat     _creat
+#define dup       _dup
+#define dup2      _dup2
+#define ecvt      _ecvt
+#define execl     _execl
+#define execle    _execle
+#define execlp    _execlp
+#define execv     _execv
+#define execve    _execve
+#define execvp    _execvp
+#define execvpe   _execvpe
+#define fcloseall _fcloseall
+#define fcvt      _fcvt
+#define fdopen    _fdopen
+#define fileno    _fileno
+#define gcvt      _gcvt
+#define getcwd    _getcwd
+#define getpid    _getpid
+#define getw      _getw
+#define isatty    _isatty
+#define j0        _j0
+#define j1        _j1
+#define jn        _jn
+#define lfind     _lfind
+#define lsearch   _lsearch
+#define lseek     _lseek
+#define memccpy   _memccpy
+#define mkdir     _mkdir
+#define mktemp    _mktemp
+#define open      _open
+#define putenv    _putenv
+#define putw      _putw
+#define read      _read
+#define rmdir     _rmdir
+#define strdup    _strdup
+#define swab      _swab
+#define tempnam   _tempnam
+#define tzset     _tzset
+#define umask     _umask
+#define unlink    _unlink
+#define utime     _utime
+#define wcsdup    _wcsdup
+#define write     _write
+#define y0        _y0
+#define y1        _y1
+#define yn        _yn
+#endif
+'
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for complete errno.h" >&5
+printf %s "checking for complete errno.h... " >&6; }
+if test ${gl_cv_header_errno_h_complete+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <errno.h>
+#if !defined ETXTBSY
+booboo
+#endif
+#if !defined ENOMSG
+booboo
+#endif
+#if !defined EIDRM
+booboo
+#endif
+#if !defined ENOLINK
+booboo
+#endif
+#if !defined EPROTO
+booboo
+#endif
+#if !defined EMULTIHOP
+booboo
+#endif
+#if !defined EBADMSG
+booboo
+#endif
+#if !defined EOVERFLOW
+booboo
+#endif
+#if !defined ENOTSUP
+booboo
+#endif
+#if !defined ENETRESET
+booboo
+#endif
+#if !defined ECONNABORTED
+booboo
+#endif
+#if !defined ESTALE
+booboo
+#endif
+#if !defined EDQUOT
+booboo
+#endif
+#if !defined ECANCELED
+booboo
+#endif
+#if !defined EOWNERDEAD
+booboo
+#endif
+#if !defined ENOTRECOVERABLE
+booboo
+#endif
+#if !defined EILSEQ
+booboo
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "booboo" >/dev/null 2>&1
+then :
+  gl_cv_header_errno_h_complete=no
+else $as_nop
+  gl_cv_header_errno_h_complete=yes
+fi
+rm -rf conftest*
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_errno_h_complete" >&5
+printf "%s\n" "$gl_cv_header_errno_h_complete" >&6; }
+  if test $gl_cv_header_errno_h_complete = yes; then
+    ERRNO_H=''
+  else
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_errno_h='<'errno.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <errno.h>" >&5
+printf %s "checking absolute name of <errno.h>... " >&6; }
+if test ${gl_cv_next_errno_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <errno.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'errno.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_errno_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_errno_h
+           gl_cv_next_errno_h='"'$gl_header'"'
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_errno_h" >&5
+printf "%s\n" "$gl_cv_next_errno_h" >&6; }
+     fi
+     NEXT_ERRNO_H=$gl_cv_next_errno_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'errno.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_errno_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_ERRNO_H=$gl_next_as_first_directive
+
+
+
+
+    ERRNO_H='errno.h'
+  fi
+
+   if test -n "$ERRNO_H"; then
+  GL_GENERATE_ERRNO_H_TRUE=
+  GL_GENERATE_ERRNO_H_FALSE='#'
+else
+  GL_GENERATE_ERRNO_H_TRUE='#'
+  GL_GENERATE_ERRNO_H_FALSE=
+fi
+
+
+  if test -n "$ERRNO_H"; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for EMULTIHOP value" >&5
+printf %s "checking for EMULTIHOP value... " >&6; }
+if test ${gl_cv_header_errno_h_EMULTIHOP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <errno.h>
+#ifdef EMULTIHOP
+yes
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "yes" >/dev/null 2>&1
+then :
+  gl_cv_header_errno_h_EMULTIHOP=yes
+else $as_nop
+  gl_cv_header_errno_h_EMULTIHOP=no
+fi
+rm -rf conftest*
+
+      if test $gl_cv_header_errno_h_EMULTIHOP = no; then
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+#ifdef EMULTIHOP
+yes
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "yes" >/dev/null 2>&1
+then :
+  gl_cv_header_errno_h_EMULTIHOP=hidden
+fi
+rm -rf conftest*
+
+        if test $gl_cv_header_errno_h_EMULTIHOP = hidden; then
+                              if ac_fn_c_compute_int "$LINENO" "EMULTIHOP" "gl_cv_header_errno_h_EMULTIHOP"        "
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+/* The following two lines are a workaround against an autoconf-2.52 bug.  */
+#include <stdio.h>
+#include <stdlib.h>
+"
+then :
+
+fi
+
+        fi
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_errno_h_EMULTIHOP" >&5
+printf "%s\n" "$gl_cv_header_errno_h_EMULTIHOP" >&6; }
+    case $gl_cv_header_errno_h_EMULTIHOP in
+      yes | no)
+        EMULTIHOP_HIDDEN=0; EMULTIHOP_VALUE=
+        ;;
+      *)
+        EMULTIHOP_HIDDEN=1; EMULTIHOP_VALUE="$gl_cv_header_errno_h_EMULTIHOP"
+        ;;
+    esac
+
+
+  fi
+
+
+  if test -n "$ERRNO_H"; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ENOLINK value" >&5
+printf %s "checking for ENOLINK value... " >&6; }
+if test ${gl_cv_header_errno_h_ENOLINK+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <errno.h>
+#ifdef ENOLINK
+yes
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "yes" >/dev/null 2>&1
+then :
+  gl_cv_header_errno_h_ENOLINK=yes
+else $as_nop
+  gl_cv_header_errno_h_ENOLINK=no
+fi
+rm -rf conftest*
+
+      if test $gl_cv_header_errno_h_ENOLINK = no; then
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+#ifdef ENOLINK
+yes
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "yes" >/dev/null 2>&1
+then :
+  gl_cv_header_errno_h_ENOLINK=hidden
+fi
+rm -rf conftest*
+
+        if test $gl_cv_header_errno_h_ENOLINK = hidden; then
+                              if ac_fn_c_compute_int "$LINENO" "ENOLINK" "gl_cv_header_errno_h_ENOLINK"        "
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+/* The following two lines are a workaround against an autoconf-2.52 bug.  */
+#include <stdio.h>
+#include <stdlib.h>
+"
+then :
+
+fi
+
+        fi
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_errno_h_ENOLINK" >&5
+printf "%s\n" "$gl_cv_header_errno_h_ENOLINK" >&6; }
+    case $gl_cv_header_errno_h_ENOLINK in
+      yes | no)
+        ENOLINK_HIDDEN=0; ENOLINK_VALUE=
+        ;;
+      *)
+        ENOLINK_HIDDEN=1; ENOLINK_VALUE="$gl_cv_header_errno_h_ENOLINK"
+        ;;
+    esac
+
+
+  fi
+
+
+  if test -n "$ERRNO_H"; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for EOVERFLOW value" >&5
+printf %s "checking for EOVERFLOW value... " >&6; }
+if test ${gl_cv_header_errno_h_EOVERFLOW+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <errno.h>
+#ifdef EOVERFLOW
+yes
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "yes" >/dev/null 2>&1
+then :
+  gl_cv_header_errno_h_EOVERFLOW=yes
+else $as_nop
+  gl_cv_header_errno_h_EOVERFLOW=no
+fi
+rm -rf conftest*
+
+      if test $gl_cv_header_errno_h_EOVERFLOW = no; then
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+#ifdef EOVERFLOW
+yes
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "yes" >/dev/null 2>&1
+then :
+  gl_cv_header_errno_h_EOVERFLOW=hidden
+fi
+rm -rf conftest*
+
+        if test $gl_cv_header_errno_h_EOVERFLOW = hidden; then
+                              if ac_fn_c_compute_int "$LINENO" "EOVERFLOW" "gl_cv_header_errno_h_EOVERFLOW"        "
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+/* The following two lines are a workaround against an autoconf-2.52 bug.  */
+#include <stdio.h>
+#include <stdlib.h>
+"
+then :
+
+fi
+
+        fi
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_errno_h_EOVERFLOW" >&5
+printf "%s\n" "$gl_cv_header_errno_h_EOVERFLOW" >&6; }
+    case $gl_cv_header_errno_h_EOVERFLOW in
+      yes | no)
+        EOVERFLOW_HIDDEN=0; EOVERFLOW_VALUE=
+        ;;
+      *)
+        EOVERFLOW_HIDDEN=1; EOVERFLOW_VALUE="$gl_cv_header_errno_h_EOVERFLOW"
+        ;;
+    esac
+
+
+  fi
+
+
+ac_fn_check_decl "$LINENO" "strerror_r" "ac_cv_have_decl_strerror_r" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_strerror_r" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_STRERROR_R $ac_have_decl" >>confdefs.h
+
+
+if test $ac_cv_have_decl_strerror_r = yes; then
+  # For backward compatibility's sake, define HAVE_STRERROR_R.
+  # (We used to run AC_CHECK_FUNCS_ONCE for strerror_r, as well
+  # as AC_CHECK_DECLS_ONCE.)
+
+printf "%s\n" "#define HAVE_STRERROR_R 1" >>confdefs.h
+
+fi
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether strerror_r returns char *" >&5
+printf %s "checking whether strerror_r returns char *... " >&6; }
+if test ${ac_cv_func_strerror_r_char_p+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    ac_cv_func_strerror_r_char_p=no
+    if test $ac_cv_have_decl_strerror_r = yes; then
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <string.h>
+int
+main (void)
+{
+
+	  char buf[100];
+	  char x = *strerror_r (0, buf, sizeof buf);
+	  char *p = strerror_r (0, buf, sizeof buf);
+	  return !p || x;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_func_strerror_r_char_p=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+    fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_strerror_r_char_p" >&5
+printf "%s\n" "$ac_cv_func_strerror_r_char_p" >&6; }
+if test $ac_cv_func_strerror_r_char_p = yes; then
+
+printf "%s\n" "#define STRERROR_R_CHAR_P 1" >>confdefs.h
+
+fi
+
+
+  XGETTEXT_EXTRA_OPTIONS=
+
+
+
+
+ac_fn_check_decl "$LINENO" "fchdir" "ac_cv_have_decl_fchdir" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_fchdir" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_FCHDIR $ac_have_decl" >>confdefs.h
+
+
+    HAVE_FCNTL=1;
+  HAVE_OPENAT=1;
+  REPLACE_CREAT=0;
+  REPLACE_FCNTL=0;
+  REPLACE_OPEN=0;
+  REPLACE_OPENAT=0;
+
+
+
+
+  GL_GNULIB_CREAT=0
+
+
+
+  GL_GNULIB_FCNTL=0
+
+
+
+  GL_GNULIB_NONBLOCKING=0
+
+
+
+  GL_GNULIB_OPEN=0
+
+
+
+  GL_GNULIB_OPENAT=0
+
+
+
+  GL_GNULIB_MDA_CREAT=1
+
+
+
+  GL_GNULIB_MDA_OPEN=1
+
+
+
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working fcntl.h" >&5
+printf %s "checking for working fcntl.h... " >&6; }
+if test ${gl_cv_header_working_fcntl_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                  # Guess 'no' on native Windows.
+          mingw*) gl_cv_header_working_fcntl_h='no' ;;
+          *)      gl_cv_header_working_fcntl_h=cross-compiling ;;
+        esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+           #include <sys/stat.h>
+           #if HAVE_UNISTD_H
+           # include <unistd.h>
+           #else /* on Windows with MSVC */
+           # include <io.h>
+           # include <stdlib.h>
+           # defined sleep(n) _sleep ((n) * 1000)
+           #endif
+           #include <fcntl.h>
+
+
+$gl_mda_defines
+
+           #ifndef O_NOATIME
+            #define O_NOATIME 0
+           #endif
+           #ifndef O_NOFOLLOW
+            #define O_NOFOLLOW 0
+           #endif
+           static int const constants[] =
+            {
+              O_CREAT, O_EXCL, O_NOCTTY, O_TRUNC, O_APPEND,
+              O_NONBLOCK, O_SYNC, O_ACCMODE, O_RDONLY, O_RDWR, O_WRONLY
+            };
+
+int
+main (void)
+{
+
+            int result = !constants;
+            #if HAVE_SYMLINK
+            {
+              static char const sym[] = "conftest.sym";
+              if (symlink ("/dev/null", sym) != 0)
+                result |= 2;
+              else
+                {
+                  int fd = open (sym, O_WRONLY | O_NOFOLLOW | O_CREAT, 0);
+                  if (fd >= 0)
+                    {
+                      close (fd);
+                      result |= 4;
+                    }
+                }
+              if (unlink (sym) != 0 || symlink (".", sym) != 0)
+                result |= 2;
+              else
+                {
+                  int fd = open (sym, O_RDONLY | O_NOFOLLOW);
+                  if (fd >= 0)
+                    {
+                      close (fd);
+                      result |= 4;
+                    }
+                }
+              unlink (sym);
+            }
+            #endif
+            {
+              static char const file[] = "confdefs.h";
+              int fd = open (file, O_RDONLY | O_NOATIME);
+              if (fd < 0)
+                result |= 8;
+              else
+                {
+                  struct stat st0;
+                  if (fstat (fd, &st0) != 0)
+                    result |= 16;
+                  else
+                    {
+                      char c;
+                      sleep (1);
+                      if (read (fd, &c, 1) != 1)
+                        result |= 24;
+                      else
+                        {
+                          if (close (fd) != 0)
+                            result |= 32;
+                          else
+                            {
+                              struct stat st1;
+                              if (stat (file, &st1) != 0)
+                                result |= 40;
+                              else
+                                if (st0.st_atime != st1.st_atime)
+                                  result |= 64;
+                            }
+                        }
+                    }
+                }
+            }
+            return result;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_header_working_fcntl_h=yes
+else $as_nop
+  case $? in #(
+        4) gl_cv_header_working_fcntl_h='no (bad O_NOFOLLOW)';; #(
+        64) gl_cv_header_working_fcntl_h='no (bad O_NOATIME)';; #(
+        68) gl_cv_header_working_fcntl_h='no (bad O_NOATIME, O_NOFOLLOW)';; #(
+         *) gl_cv_header_working_fcntl_h='no';;
+        esac
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_working_fcntl_h" >&5
+printf "%s\n" "$gl_cv_header_working_fcntl_h" >&6; }
+
+  case $gl_cv_header_working_fcntl_h in #(
+  *O_NOATIME* | no | cross-compiling) ac_val=0;; #(
+  *) ac_val=1;;
+  esac
+
+printf "%s\n" "#define HAVE_WORKING_O_NOATIME $ac_val" >>confdefs.h
+
+
+  case $gl_cv_header_working_fcntl_h in #(
+  *O_NOFOLLOW* | no | cross-compiling) ac_val=0;; #(
+  *) ac_val=1;;
+  esac
+
+printf "%s\n" "#define HAVE_WORKING_O_NOFOLLOW $ac_val" >>confdefs.h
+
+
+
+  ac_fn_c_check_type "$LINENO" "pid_t" "ac_cv_type_pid_t" "$ac_includes_default
+"
+if test "x$ac_cv_type_pid_t" = xyes
+then :
+
+else $as_nop
+                                          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+          #if defined _WIN64 && !defined __CYGWIN__
+          LLP64
+          #endif
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_pid_type='int'
+else $as_nop
+  ac_pid_type='__int64'
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+printf "%s\n" "#define pid_t $ac_pid_type" >>confdefs.h
+
+
+fi
+
+
+ac_fn_c_check_type "$LINENO" "mode_t" "ac_cv_type_mode_t" "$ac_includes_default"
+if test "x$ac_cv_type_mode_t" = xyes
+then :
+
+else $as_nop
+
+printf "%s\n" "#define mode_t int" >>confdefs.h
+
+fi
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_fcntl_h='<'fcntl.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <fcntl.h>" >&5
+printf %s "checking absolute name of <fcntl.h>... " >&6; }
+if test ${gl_cv_next_fcntl_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <fcntl.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'fcntl.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_fcntl_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_fcntl_h
+           gl_cv_next_fcntl_h='"'$gl_header'"'
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_fcntl_h" >&5
+printf "%s\n" "$gl_cv_next_fcntl_h" >&6; }
+     fi
+     NEXT_FCNTL_H=$gl_cv_next_fcntl_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'fcntl.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_fcntl_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_FCNTL_H=$gl_next_as_first_directive
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for promoted mode_t type" >&5
+printf %s "checking for promoted mode_t type... " >&6; }
+if test ${gl_cv_promoted_mode_t+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+int
+main (void)
+{
+typedef int array[2 * (sizeof (mode_t) < sizeof (int)) - 1];
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_promoted_mode_t='int'
+else $as_nop
+  gl_cv_promoted_mode_t='mode_t'
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_promoted_mode_t" >&5
+printf "%s\n" "$gl_cv_promoted_mode_t" >&6; }
+
+printf "%s\n" "#define PROMOTED_MODE_T $gl_cv_promoted_mode_t" >>confdefs.h
+
+
+
+
+
+    HAVE_FNMATCH=1;
+  REPLACE_FNMATCH=0;
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_fnmatch_h='<'fnmatch.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <fnmatch.h>" >&5
+printf %s "checking absolute name of <fnmatch.h>... " >&6; }
+if test ${gl_cv_next_fnmatch_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_fnmatch_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <fnmatch.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'fnmatch.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_fnmatch_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_fnmatch_h
+           gl_cv_next_fnmatch_h='"'$gl_header'"'
+          else
+               gl_cv_next_fnmatch_h='<'fnmatch.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_fnmatch_h" >&5
+printf "%s\n" "$gl_cv_next_fnmatch_h" >&6; }
+     fi
+     NEXT_FNMATCH_H=$gl_cv_next_fnmatch_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'fnmatch.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_fnmatch_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_FNMATCH_H=$gl_next_as_first_directive
+
+
+
+
+
+
+
+  if test $ac_cv_header_fnmatch_h = yes; then
+    HAVE_FNMATCH_H=1
+  else
+    HAVE_FNMATCH_H=0
+  fi
+
+
+  FNMATCH_H=''
+     if false; then
+              FNMATCH_H=fnmatch.h
+     else
+       if test $ac_cv_header_fnmatch_h != yes; then
+                  FNMATCH_H=fnmatch.h
+       fi
+     fi
+
+
+   if test -n "$FNMATCH_H"; then
+  GL_GENERATE_FNMATCH_H_TRUE=
+  GL_GENERATE_FNMATCH_H_FALSE='#'
+else
+  GL_GENERATE_FNMATCH_H_TRUE='#'
+  GL_GENERATE_FNMATCH_H_FALSE=
+fi
+
+
+
+
+
+
+
+
+
+  GL_GNULIB_FNMATCH=0
+
+
+
+
+
+   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for mbstate_t" >&5
+printf %s "checking for mbstate_t... " >&6; }
+if test ${ac_cv_type_mbstate_t+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+             #include <wchar.h>
+int
+main (void)
+{
+mbstate_t x; return sizeof x;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_type_mbstate_t=yes
+else $as_nop
+  ac_cv_type_mbstate_t=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_type_mbstate_t" >&5
+printf "%s\n" "$ac_cv_type_mbstate_t" >&6; }
+   if test $ac_cv_type_mbstate_t = yes; then
+
+printf "%s\n" "#define HAVE_MBSTATE_T 1" >>confdefs.h
+
+   else
+
+printf "%s\n" "#define mbstate_t int" >>confdefs.h
+
+   fi
+
+
+
+    HAVE_DECL_FCLOSEALL=1;
+  HAVE_DECL_FPURGE=1;
+  HAVE_DECL_FSEEKO=1;
+  HAVE_DECL_FTELLO=1;
+  HAVE_DECL_GETDELIM=1;
+  HAVE_DECL_GETLINE=1;
+  HAVE_DECL_OBSTACK_PRINTF=1;
+  HAVE_DECL_SNPRINTF=1;
+  HAVE_DECL_VSNPRINTF=1;
+  HAVE_DPRINTF=1;
+  HAVE_FSEEKO=1;
+  HAVE_FTELLO=1;
+  HAVE_PCLOSE=1;
+  HAVE_POPEN=1;
+  HAVE_RENAMEAT=1;
+  HAVE_VASPRINTF=1;
+  HAVE_VDPRINTF=1;
+  REPLACE_DPRINTF=0;
+  REPLACE_FCLOSE=0;
+  REPLACE_FDOPEN=0;
+  REPLACE_FFLUSH=0;
+  REPLACE_FOPEN=0;
+  REPLACE_FPRINTF=0;
+  REPLACE_FPURGE=0;
+  REPLACE_FREOPEN=0;
+  REPLACE_FSEEK=0;
+  REPLACE_FSEEKO=0;
+  REPLACE_FTELL=0;
+  REPLACE_FTELLO=0;
+  REPLACE_GETDELIM=0;
+  REPLACE_GETLINE=0;
+  REPLACE_OBSTACK_PRINTF=0;
+  REPLACE_PERROR=0;
+  REPLACE_POPEN=0;
+  REPLACE_PRINTF=0;
+  REPLACE_REMOVE=0;
+  REPLACE_RENAME=0;
+  REPLACE_RENAMEAT=0;
+  REPLACE_SNPRINTF=0;
+  REPLACE_SPRINTF=0;
+  REPLACE_STDIO_READ_FUNCS=0;
+  REPLACE_STDIO_WRITE_FUNCS=0;
+  REPLACE_TMPFILE=0;
+  REPLACE_VASPRINTF=0;
+  REPLACE_VDPRINTF=0;
+  REPLACE_VFPRINTF=0;
+  REPLACE_VPRINTF=0;
+  REPLACE_VSNPRINTF=0;
+  REPLACE_VSPRINTF=0;
+
+
+
+  GL_GNULIB_DPRINTF=0
+
+
+
+  GL_GNULIB_FCLOSE=0
+
+
+
+  GL_GNULIB_FDOPEN=0
+
+
+
+  GL_GNULIB_FFLUSH=0
+
+
+
+  GL_GNULIB_FGETC=0
+
+
+
+  GL_GNULIB_FGETS=0
+
+
+
+  GL_GNULIB_FOPEN=0
+
+
+
+  GL_GNULIB_FPRINTF=0
+
+
+
+  GL_GNULIB_FPRINTF_POSIX=0
+
+
+
+  GL_GNULIB_FPURGE=0
+
+
+
+  GL_GNULIB_FPUTC=0
+
+
+
+  GL_GNULIB_FPUTS=0
+
+
+
+  GL_GNULIB_FREAD=0
+
+
+
+  GL_GNULIB_FREOPEN=0
+
+
+
+  GL_GNULIB_FSCANF=0
+
+
+
+  GL_GNULIB_FSEEK=0
+
+
+
+  GL_GNULIB_FSEEKO=0
+
+
+
+  GL_GNULIB_FTELL=0
+
+
+
+  GL_GNULIB_FTELLO=0
+
+
+
+  GL_GNULIB_FWRITE=0
+
+
+
+  GL_GNULIB_GETC=0
+
+
+
+  GL_GNULIB_GETCHAR=0
+
+
+
+  GL_GNULIB_GETDELIM=0
+
+
+
+  GL_GNULIB_GETLINE=0
+
+
+
+  GL_GNULIB_OBSTACK_PRINTF=0
+
+
+
+  GL_GNULIB_OBSTACK_PRINTF_POSIX=0
+
+
+
+  GL_GNULIB_PCLOSE=0
+
+
+
+  GL_GNULIB_PERROR=0
+
+
+
+  GL_GNULIB_POPEN=0
+
+
+
+  GL_GNULIB_PRINTF=0
+
+
+
+  GL_GNULIB_PRINTF_POSIX=0
+
+
+
+  GL_GNULIB_PUTC=0
+
+
+
+  GL_GNULIB_PUTCHAR=0
+
+
+
+  GL_GNULIB_PUTS=0
+
+
+
+  GL_GNULIB_REMOVE=0
+
+
+
+  GL_GNULIB_RENAME=0
+
+
+
+  GL_GNULIB_RENAMEAT=0
+
+
+
+  GL_GNULIB_SCANF=0
+
+
+
+  GL_GNULIB_SNPRINTF=0
+
+
+
+  GL_GNULIB_SPRINTF_POSIX=0
+
+
+
+  GL_GNULIB_STDIO_H_NONBLOCKING=0
+
+
+
+  GL_GNULIB_STDIO_H_SIGPIPE=0
+
+
+
+  GL_GNULIB_TMPFILE=0
+
+
+
+  GL_GNULIB_VASPRINTF=0
+
+
+
+  GL_GNULIB_VFSCANF=0
+
+
+
+  GL_GNULIB_VSCANF=0
+
+
+
+  GL_GNULIB_VDPRINTF=0
+
+
+
+  GL_GNULIB_VFPRINTF=0
+
+
+
+  GL_GNULIB_VFPRINTF_POSIX=0
+
+
+
+  GL_GNULIB_VPRINTF=0
+
+
+
+  GL_GNULIB_VPRINTF_POSIX=0
+
+
+
+  GL_GNULIB_VSNPRINTF=0
+
+
+
+  GL_GNULIB_VSPRINTF_POSIX=0
+
+
+
+  GL_GNULIB_MDA_FCLOSEALL=1
+
+
+
+  GL_GNULIB_MDA_FDOPEN=1
+
+
+
+  GL_GNULIB_MDA_FILENO=1
+
+
+
+  GL_GNULIB_MDA_GETW=1
+
+
+
+  GL_GNULIB_MDA_PUTW=1
+
+
+
+  GL_GNULIB_MDA_TEMPNAM=1
+
+
+
+
+
+    HAVE_FCHMODAT=1;
+  HAVE_FSTATAT=1;
+  HAVE_FUTIMENS=1;
+  HAVE_GETUMASK=1;
+  HAVE_LCHMOD=1;
+  HAVE_LSTAT=1;
+  HAVE_MKDIRAT=1;
+  HAVE_MKFIFO=1;
+  HAVE_MKFIFOAT=1;
+  HAVE_MKNOD=1;
+  HAVE_MKNODAT=1;
+  HAVE_UTIMENSAT=1;
+  REPLACE_FCHMODAT=0;
+  REPLACE_FSTAT=0;
+  REPLACE_FSTATAT=0;
+  REPLACE_FUTIMENS=0;
+  REPLACE_LSTAT=0;
+  REPLACE_MKDIR=0;
+  REPLACE_MKFIFO=0;
+  REPLACE_MKFIFOAT=0;
+  REPLACE_MKNOD=0;
+  REPLACE_MKNODAT=0;
+  REPLACE_STAT=0;
+  REPLACE_UTIMENSAT=0;
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether stat file-mode macros are broken" >&5
+printf %s "checking whether stat file-mode macros are broken... " >&6; }
+if test ${ac_cv_header_stat_broken+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#if defined S_ISBLK && defined S_IFDIR
+extern char c1[S_ISBLK (S_IFDIR) ? -1 : 1];
+#endif
+
+#if defined S_ISBLK && defined S_IFCHR
+extern char c2[S_ISBLK (S_IFCHR) ? -1 : 1];
+#endif
+
+#if defined S_ISLNK && defined S_IFREG
+extern char c3[S_ISLNK (S_IFREG) ? -1 : 1];
+#endif
+
+#if defined S_ISSOCK && defined S_IFREG
+extern char c4[S_ISSOCK (S_IFREG) ? -1 : 1];
+#endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_header_stat_broken=no
+else $as_nop
+  ac_cv_header_stat_broken=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stat_broken" >&5
+printf "%s\n" "$ac_cv_header_stat_broken" >&6; }
+if test $ac_cv_header_stat_broken = yes; then
+
+printf "%s\n" "#define STAT_MACROS_BROKEN 1" >>confdefs.h
+
+fi
+
+
+
+  case "$host_os" in
+    mingw*)
+                        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for 64-bit off_t" >&5
+printf %s "checking for 64-bit off_t... " >&6; }
+if test ${gl_cv_type_off_t_64+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+                int verify_off_t_size[sizeof (off_t) >= 8 ? 1 : -1];
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_type_off_t_64=yes
+else $as_nop
+  gl_cv_type_off_t_64=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_type_off_t_64" >&5
+printf "%s\n" "$gl_cv_type_off_t_64" >&6; }
+      if test $gl_cv_type_off_t_64 = no; then
+        WINDOWS_64_BIT_OFF_T=1
+      else
+        WINDOWS_64_BIT_OFF_T=0
+      fi
+                        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for 64-bit st_size" >&5
+printf %s "checking for 64-bit st_size... " >&6; }
+if test ${gl_cv_member_st_size_64+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+                struct stat buf;
+                int verify_st_size_size[sizeof (buf.st_size) >= 8 ? 1 : -1];
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_member_st_size_64=yes
+else $as_nop
+  gl_cv_member_st_size_64=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_member_st_size_64" >&5
+printf "%s\n" "$gl_cv_member_st_size_64" >&6; }
+      if test $gl_cv_member_st_size_64 = no; then
+        WINDOWS_64_BIT_ST_SIZE=1
+      else
+        WINDOWS_64_BIT_ST_SIZE=0
+      fi
+      ;;
+    *)
+                                                      WINDOWS_64_BIT_OFF_T=0
+      WINDOWS_64_BIT_ST_SIZE=0
+      ;;
+  esac
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C/C++ restrict keyword" >&5
+printf %s "checking for C/C++ restrict keyword... " >&6; }
+if test ${ac_cv_c_restrict+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_c_restrict=no
+   # Put '__restrict__' first, to avoid problems with glibc and non-GCC; see:
+   # https://lists.gnu.org/archive/html/bug-autoconf/2016-02/msg00006.html
+   # Put 'restrict' last, because C++ lacks it.
+   for ac_kw in __restrict__ __restrict _Restrict restrict; do
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+typedef int *int_ptr;
+	   int foo (int_ptr $ac_kw ip) { return ip[0]; }
+	   int bar (int [$ac_kw]); /* Catch GCC bug 14050.  */
+	   int bar (int ip[$ac_kw]) { return ip[0]; }
+
+int
+main (void)
+{
+int s[1];
+	   int *$ac_kw t = s;
+	   t[0] = 0;
+	   return foo (t) + bar (t);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_c_restrict=$ac_kw
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+     test "$ac_cv_c_restrict" != no && break
+   done
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_restrict" >&5
+printf "%s\n" "$ac_cv_c_restrict" >&6; }
+
+ case $ac_cv_c_restrict in
+   restrict) ;;
+   no) printf "%s\n" "#define restrict /**/" >>confdefs.h
+ ;;
+   *)  printf "%s\n" "#define restrict $ac_cv_c_restrict" >>confdefs.h
+ ;;
+ esac
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_sys_stat_h='<'sys/stat.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <sys/stat.h>" >&5
+printf %s "checking absolute name of <sys/stat.h>... " >&6; }
+if test ${gl_cv_next_sys_stat_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_sys_stat_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/stat.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'sys/stat.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_sys_stat_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_sys_stat_h
+           gl_cv_next_sys_stat_h='"'$gl_header'"'
+          else
+               gl_cv_next_sys_stat_h='<'sys/stat.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_sys_stat_h" >&5
+printf "%s\n" "$gl_cv_next_sys_stat_h" >&6; }
+     fi
+     NEXT_SYS_STAT_H=$gl_cv_next_sys_stat_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'sys/stat.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_sys_stat_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H=$gl_next_as_first_directive
+
+
+
+
+
+
+
+
+    WINDOWS_STAT_TIMESPEC=0
+
+
+
+
+
+
+
+
+      ac_fn_c_check_type "$LINENO" "nlink_t" "ac_cv_type_nlink_t" "#include <sys/types.h>
+     #include <sys/stat.h>
+"
+if test "x$ac_cv_type_nlink_t" = xyes
+then :
+
+else $as_nop
+
+printf "%s\n" "#define nlink_t int" >>confdefs.h
+
+fi
+
+
+
+
+
+
+
+
+
+
+  case "$host_os" in
+    mingw*)
+      ac_fn_c_check_header_compile "$LINENO" "sdkddkver.h" "ac_cv_header_sdkddkver_h" "$ac_includes_default"
+if test "x$ac_cv_header_sdkddkver_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SDKDDKVER_H 1" >>confdefs.h
+
+fi
+
+      ;;
+  esac
+
+
+
+
+
+
+
+  GL_GNULIB_FCHMODAT=0
+
+
+
+  GL_GNULIB_FSTAT=0
+
+
+
+  GL_GNULIB_FSTATAT=0
+
+
+
+  GL_GNULIB_FUTIMENS=0
+
+
+
+  GL_GNULIB_GETUMASK=0
+
+
+
+  GL_GNULIB_LCHMOD=0
+
+
+
+  GL_GNULIB_LSTAT=0
+
+
+
+  GL_GNULIB_MKDIR=0
+
+
+
+  GL_GNULIB_MKDIRAT=0
+
+
+
+  GL_GNULIB_MKFIFO=0
+
+
+
+  GL_GNULIB_MKFIFOAT=0
+
+
+
+  GL_GNULIB_MKNOD=0
+
+
+
+  GL_GNULIB_MKNODAT=0
+
+
+
+  GL_GNULIB_STAT=0
+
+
+
+  GL_GNULIB_UTIMENSAT=0
+
+
+
+  GL_GNULIB_OVERRIDES_STRUCT_STAT=0
+
+
+
+  GL_GNULIB_MDA_CHMOD=1
+
+
+
+  GL_GNULIB_MDA_MKDIR=1
+
+
+
+  GL_GNULIB_MDA_UMASK=1
+
+
+
+
+         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether lstat correctly handles trailing slash" >&5
+printf %s "checking whether lstat correctly handles trailing slash... " >&6; }
+if test ${gl_cv_func_lstat_dereferences_slashed_symlink+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  rm -f conftest.sym conftest.file
+     echo >conftest.file
+     if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+          linux-* | linux)
+            # Guess yes on Linux systems.
+            gl_cv_func_lstat_dereferences_slashed_symlink="guessing yes" ;;
+          *-gnu* | gnu*)
+            # Guess yes on glibc systems.
+            gl_cv_func_lstat_dereferences_slashed_symlink="guessing yes" ;;
+          mingw*)
+            # Guess no on native Windows.
+            gl_cv_func_lstat_dereferences_slashed_symlink="guessing no" ;;
+          *)
+            # If we don't know, obey --enable-cross-guesses.
+            gl_cv_func_lstat_dereferences_slashed_symlink="$gl_cross_guess_normal" ;;
+        esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+int
+main (void)
+{
+struct stat sbuf;
+            if (symlink ("conftest.file", "conftest.sym") != 0)
+              return 1;
+            /* Linux will dereference the symlink and fail, as required by
+               POSIX.  That is better in the sense that it means we will not
+               have to compile and use the lstat wrapper.  */
+            return lstat ("conftest.sym/", &sbuf) == 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_lstat_dereferences_slashed_symlink=yes
+else $as_nop
+  gl_cv_func_lstat_dereferences_slashed_symlink=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+     rm -f conftest.sym conftest.file
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_lstat_dereferences_slashed_symlink" >&5
+printf "%s\n" "$gl_cv_func_lstat_dereferences_slashed_symlink" >&6; }
+  case "$gl_cv_func_lstat_dereferences_slashed_symlink" in
+    *yes)
+
+printf "%s\n" "#define LSTAT_FOLLOWS_SLASHED_SYMLINK 1" >>confdefs.h
+
+      ;;
+  esac
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for O_CLOEXEC" >&5
+printf %s "checking for O_CLOEXEC... " >&6; }
+if test ${gl_cv_macro_O_CLOEXEC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <fcntl.h>
+                          #ifndef O_CLOEXEC
+                            choke me;
+                          #endif
+
+int
+main (void)
+{
+return O_CLOEXEC;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_macro_O_CLOEXEC=yes
+else $as_nop
+  gl_cv_macro_O_CLOEXEC=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_macro_O_CLOEXEC" >&5
+printf "%s\n" "$gl_cv_macro_O_CLOEXEC" >&6; }
+
+
+
+
+
+   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether getcwd (NULL, 0) allocates memory for result" >&5
+printf %s "checking whether getcwd (NULL, 0) allocates memory for result... " >&6; }
+if test ${gl_cv_func_getcwd_null+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                           # Guess yes on glibc systems.
+            *-gnu* | gnu*) gl_cv_func_getcwd_null="guessing yes";;
+                           # Guess yes on musl systems.
+            *-musl*)       gl_cv_func_getcwd_null="guessing yes";;
+                           # Guess yes on Cygwin.
+            cygwin*)       gl_cv_func_getcwd_null="guessing yes";;
+                           # If we don't know, obey --enable-cross-guesses.
+            *)             gl_cv_func_getcwd_null="$gl_cross_guess_normal";;
+          esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#	 include <stdlib.h>
+#        if HAVE_UNISTD_H
+#         include <unistd.h>
+#        else /* on Windows with MSVC */
+#         include <direct.h>
+#        endif
+
+
+$gl_mda_defines
+
+#        ifndef getcwd
+         char *getcwd ();
+#        endif
+
+int
+main (void)
+{
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* mingw cwd does not start with '/', but _getcwd does allocate.
+   However, mingw fails to honor non-zero size.  */
+#else
+           if (chdir ("/") != 0)
+             return 1;
+           else
+             {
+               char *f = getcwd (NULL, 0);
+               if (! f)
+                 return 2;
+               if (f[0] != '/')
+                 { free (f); return 3; }
+               if (f[1] != '\0')
+                 { free (f); return 4; }
+               free (f);
+               return 0;
+             }
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_getcwd_null=yes
+else $as_nop
+  gl_cv_func_getcwd_null=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_getcwd_null" >&5
+printf "%s\n" "$gl_cv_func_getcwd_null" >&6; }
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for getcwd with POSIX signature" >&5
+printf %s "checking for getcwd with POSIX signature... " >&6; }
+if test ${gl_cv_func_getcwd_posix_signature+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <unistd.h>
+
+
+$gl_mda_defines
+
+int
+main (void)
+{
+extern
+           #ifdef __cplusplus
+           "C"
+           #endif
+           char *getcwd (char *, size_t);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_func_getcwd_posix_signature=yes
+else $as_nop
+  gl_cv_func_getcwd_posix_signature=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_getcwd_posix_signature" >&5
+printf "%s\n" "$gl_cv_func_getcwd_posix_signature" >&6; }
+
+
+ac_fn_check_decl "$LINENO" "getdtablesize" "ac_cv_have_decl_getdtablesize" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_getdtablesize" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_GETDTABLESIZE $ac_have_decl" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_getopt_h='<'getopt.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <getopt.h>" >&5
+printf %s "checking absolute name of <getopt.h>... " >&6; }
+if test ${gl_cv_next_getopt_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_getopt_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <getopt.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'getopt.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_getopt_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_getopt_h
+           gl_cv_next_getopt_h='"'$gl_header'"'
+          else
+               gl_cv_next_getopt_h='<'getopt.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_getopt_h" >&5
+printf "%s\n" "$gl_cv_next_getopt_h" >&6; }
+     fi
+     NEXT_GETOPT_H=$gl_cv_next_getopt_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'getopt.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_getopt_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_GETOPT_H=$gl_next_as_first_directive
+
+
+
+
+  if test $ac_cv_header_getopt_h = yes; then
+    HAVE_GETOPT_H=1
+  else
+    HAVE_GETOPT_H=0
+  fi
+
+
+  gl_replace_getopt=
+
+    if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
+           for ac_header in getopt.h
+do :
+  ac_fn_c_check_header_compile "$LINENO" "getopt.h" "ac_cv_header_getopt_h" "$ac_includes_default"
+if test "x$ac_cv_header_getopt_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_GETOPT_H 1" >>confdefs.h
+
+else $as_nop
+  gl_replace_getopt=yes
+fi
+
+done
+  fi
+
+    if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
+
+  for ac_func in getopt_long_only
+do :
+  ac_fn_c_check_func "$LINENO" "getopt_long_only" "ac_cv_func_getopt_long_only"
+if test "x$ac_cv_func_getopt_long_only" = xyes
+then :
+  printf "%s\n" "#define HAVE_GETOPT_LONG_ONLY 1" >>confdefs.h
+
+else $as_nop
+  gl_replace_getopt=yes
+fi
+
+done
+  fi
+
+          if test -z "$gl_replace_getopt"; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether getopt is POSIX compatible" >&5
+printf %s "checking whether getopt is POSIX compatible... " >&6; }
+if test ${gl_cv_func_getopt_posix+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                                                if test $cross_compiling = no; then
+                              if test "$cross_compiling" = yes
+then :
+  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot run test program while cross compiling
+See \`config.log' for more details" "$LINENO" 5; }
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+int
+main ()
+{
+  static char program[] = "program";
+  static char a[] = "-a";
+  static char foo[] = "foo";
+  static char bar[] = "bar";
+  char *argv[] = { program, a, foo, bar, NULL };
+  int c;
+
+  c = getopt (4, argv, "ab");
+  if (!(c == 'a'))
+    return 1;
+  c = getopt (4, argv, "ab");
+  if (!(c == -1))
+    return 2;
+  if (!(optind == 2))
+    return 3;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_getopt_posix=maybe
+else $as_nop
+  gl_cv_func_getopt_posix=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+          if test $gl_cv_func_getopt_posix = maybe; then
+                                    if test "$cross_compiling" = yes
+then :
+  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot run test program while cross compiling
+See \`config.log' for more details" "$LINENO" 5; }
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+int
+main ()
+{
+  static char program[] = "program";
+  static char donald[] = "donald";
+  static char p[] = "-p";
+  static char billy[] = "billy";
+  static char duck[] = "duck";
+  static char a[] = "-a";
+  static char bar[] = "bar";
+  char *argv[] = { program, donald, p, billy, duck, a, bar, NULL };
+  int c;
+
+  c = getopt (7, argv, "+abp:q:");
+  if (!(c == -1))
+    return 4;
+  if (!(strcmp (argv[0], "program") == 0))
+    return 5;
+  if (!(strcmp (argv[1], "donald") == 0))
+    return 6;
+  if (!(strcmp (argv[2], "-p") == 0))
+    return 7;
+  if (!(strcmp (argv[3], "billy") == 0))
+    return 8;
+  if (!(strcmp (argv[4], "duck") == 0))
+    return 9;
+  if (!(strcmp (argv[5], "-a") == 0))
+    return 10;
+  if (!(strcmp (argv[6], "bar") == 0))
+    return 11;
+  if (!(optind == 1))
+    return 12;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_getopt_posix=maybe
+else $as_nop
+  gl_cv_func_getopt_posix=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+          fi
+          if test $gl_cv_func_getopt_posix = maybe; then
+                        if test "$cross_compiling" = yes
+then :
+  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot run test program while cross compiling
+See \`config.log' for more details" "$LINENO" 5; }
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+int
+main ()
+{
+  static char program[] = "program";
+  static char ab[] = "-ab";
+  char *argv[3] = { program, ab, NULL };
+  if (getopt (2, argv, "ab:") != 'a')
+    return 13;
+  if (getopt (2, argv, "ab:") != '?')
+    return 14;
+  if (optopt != 'b')
+    return 15;
+  if (optind != 2)
+    return 16;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_getopt_posix=yes
+else $as_nop
+  gl_cv_func_getopt_posix=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+          fi
+        else
+          case "$host_os" in
+            darwin* | aix* | mingw*) gl_cv_func_getopt_posix="guessing no";;
+            *)                       gl_cv_func_getopt_posix="guessing yes";;
+          esac
+        fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_getopt_posix" >&5
+printf "%s\n" "$gl_cv_func_getopt_posix" >&6; }
+    case "$gl_cv_func_getopt_posix" in
+      *no) gl_replace_getopt=yes ;;
+    esac
+  fi
+
+  if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working GNU getopt function" >&5
+printf %s "checking for working GNU getopt function... " >&6; }
+if test ${gl_cv_func_getopt_gnu+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  # Even with POSIXLY_CORRECT, the GNU extension of leading '-' in the
+       # optstring is necessary for programs like m4 that have POSIX-mandated
+       # semantics for supporting options interspersed with files.
+       # Also, since getopt_long is a GNU extension, we require optind=0.
+       # Bash ties 'set -o posix' to a non-exported POSIXLY_CORRECT;
+       # so take care to revert to the correct (non-)export state.
+       gl_awk_probe='BEGIN { if ("POSIXLY_CORRECT" in ENVIRON) print "x" }'
+       case ${POSIXLY_CORRECT+x}`$AWK "$gl_awk_probe" </dev/null` in
+         xx) gl_had_POSIXLY_CORRECT=exported ;;
+         x)  gl_had_POSIXLY_CORRECT=yes      ;;
+         *)  gl_had_POSIXLY_CORRECT=         ;;
+       esac
+       POSIXLY_CORRECT=1
+       export POSIXLY_CORRECT
+       if test "$cross_compiling" = yes
+then :
+                             gl_cv_func_getopt_gnu="$gl_cross_guess_normal"
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <getopt.h>
+                           #include <stddef.h>
+                           #include <string.h>
+
+#include <stdlib.h>
+#if defined __MACH__ && defined __APPLE__
+/* Avoid a crash on Mac OS X.  */
+#include <mach/mach.h>
+#include <mach/mach_error.h>
+#include <mach/thread_status.h>
+#include <mach/exception.h>
+#include <mach/task.h>
+#include <pthread.h>
+/* The exception port on which our thread listens.  */
+static mach_port_t our_exception_port;
+/* The main function of the thread listening for exceptions of type
+   EXC_BAD_ACCESS.  */
+static void *
+mach_exception_thread (void *arg)
+{
+  /* Buffer for a message to be received.  */
+  struct {
+    mach_msg_header_t head;
+    mach_msg_body_t msgh_body;
+    char data[1024];
+  } msg;
+  mach_msg_return_t retval;
+  /* Wait for a message on the exception port.  */
+  retval = mach_msg (&msg.head, MACH_RCV_MSG | MACH_RCV_LARGE, 0, sizeof (msg),
+                     our_exception_port, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
+  if (retval != MACH_MSG_SUCCESS)
+    abort ();
+  exit (1);
+}
+static void
+nocrash_init (void)
+{
+  mach_port_t self = mach_task_self ();
+  /* Allocate a port on which the thread shall listen for exceptions.  */
+  if (mach_port_allocate (self, MACH_PORT_RIGHT_RECEIVE, &our_exception_port)
+      == KERN_SUCCESS) {
+    /* See https://web.mit.edu/darwin/src/modules/xnu/osfmk/man/mach_port_insert_right.html.  */
+    if (mach_port_insert_right (self, our_exception_port, our_exception_port,
+                                MACH_MSG_TYPE_MAKE_SEND)
+        == KERN_SUCCESS) {
+      /* The exceptions we want to catch.  Only EXC_BAD_ACCESS is interesting
+         for us.  */
+      exception_mask_t mask = EXC_MASK_BAD_ACCESS;
+      /* Create the thread listening on the exception port.  */
+      pthread_attr_t attr;
+      pthread_t thread;
+      if (pthread_attr_init (&attr) == 0
+          && pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED) == 0
+          && pthread_create (&thread, &attr, mach_exception_thread, NULL) == 0) {
+        pthread_attr_destroy (&attr);
+        /* Replace the exception port info for these exceptions with our own.
+           Note that we replace the exception port for the entire task, not only
+           for a particular thread.  This has the effect that when our exception
+           port gets the message, the thread specific exception port has already
+           been asked, and we don't need to bother about it.
+           See https://web.mit.edu/darwin/src/modules/xnu/osfmk/man/task_set_exception_ports.html.  */
+        task_set_exception_ports (self, mask, our_exception_port,
+                                  EXCEPTION_DEFAULT, MACHINE_THREAD_STATE);
+      }
+    }
+  }
+}
+#elif defined _WIN32 && ! defined __CYGWIN__
+/* Avoid a crash on native Windows.  */
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <winerror.h>
+static LONG WINAPI
+exception_filter (EXCEPTION_POINTERS *ExceptionInfo)
+{
+  switch (ExceptionInfo->ExceptionRecord->ExceptionCode)
+    {
+    case EXCEPTION_ACCESS_VIOLATION:
+    case EXCEPTION_IN_PAGE_ERROR:
+    case EXCEPTION_STACK_OVERFLOW:
+    case EXCEPTION_GUARD_PAGE:
+    case EXCEPTION_PRIV_INSTRUCTION:
+    case EXCEPTION_ILLEGAL_INSTRUCTION:
+    case EXCEPTION_DATATYPE_MISALIGNMENT:
+    case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
+    case EXCEPTION_NONCONTINUABLE_EXCEPTION:
+      exit (1);
+    }
+  return EXCEPTION_CONTINUE_SEARCH;
+}
+static void
+nocrash_init (void)
+{
+  SetUnhandledExceptionFilter ((LPTOP_LEVEL_EXCEPTION_FILTER) exception_filter);
+}
+#else
+/* Avoid a crash on POSIX systems.  */
+#include <signal.h>
+#include <unistd.h>
+/* A POSIX signal handler.  */
+static void
+exception_handler (int sig)
+{
+  _exit (1);
+}
+static void
+nocrash_init (void)
+{
+#ifdef SIGSEGV
+  signal (SIGSEGV, exception_handler);
+#endif
+#ifdef SIGBUS
+  signal (SIGBUS, exception_handler);
+#endif
+}
+#endif
+
+
+int
+main (void)
+{
+
+             int result = 0;
+
+             nocrash_init();
+
+             /* This code succeeds on glibc 2.8, OpenBSD 4.0, Cygwin, mingw,
+                and fails on Mac OS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5,
+                OSF/1 5.1, Solaris 10.  */
+             {
+               static char conftest[] = "conftest";
+               static char plus[] = "-+";
+               char *argv[3] = { conftest, plus, NULL };
+               opterr = 0;
+               if (getopt (2, argv, "+a") != '?')
+                 result |= 1;
+             }
+             /* This code succeeds on glibc 2.8, mingw,
+                and fails on Mac OS X 10.5, OpenBSD 4.0, AIX 5.2, HP-UX 11,
+                IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x.  */
+             {
+               static char program[] = "program";
+               static char p[] = "-p";
+               static char foo[] = "foo";
+               static char bar[] = "bar";
+               char *argv[] = { program, p, foo, bar, NULL };
+
+               optind = 1;
+               if (getopt (4, argv, "p::") != 'p')
+                 result |= 2;
+               else if (optarg != NULL)
+                 result |= 4;
+               else if (getopt (4, argv, "p::") != -1)
+                 result |= 6;
+               else if (optind != 2)
+                 result |= 8;
+             }
+             /* This code succeeds on glibc 2.8 and fails on Cygwin 1.7.0.  */
+             {
+               static char program[] = "program";
+               static char foo[] = "foo";
+               static char p[] = "-p";
+               char *argv[] = { program, foo, p, NULL };
+               optind = 0;
+               if (getopt (3, argv, "-p") != 1)
+                 result |= 16;
+               else if (getopt (3, argv, "-p") != 'p')
+                 result |= 16;
+             }
+             /* This code fails on glibc 2.11.  */
+             {
+               static char program[] = "program";
+               static char b[] = "-b";
+               static char a[] = "-a";
+               char *argv[] = { program, b, a, NULL };
+               optind = opterr = 0;
+               if (getopt (3, argv, "+:a:b") != 'b')
+                 result |= 32;
+               else if (getopt (3, argv, "+:a:b") != ':')
+                 result |= 32;
+             }
+             /* This code dumps core on glibc 2.14.  */
+             {
+               static char program[] = "program";
+               static char w[] = "-W";
+               static char dummy[] = "dummy";
+               char *argv[] = { program, w, dummy, NULL };
+               optind = opterr = 1;
+               if (getopt (3, argv, "W;") != 'W')
+                 result |= 64;
+             }
+             return result;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_getopt_gnu=yes
+else $as_nop
+  gl_cv_func_getopt_gnu=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+       case $gl_had_POSIXLY_CORRECT in
+         exported) ;;
+         yes) { POSIXLY_CORRECT=; unset POSIXLY_CORRECT;}; POSIXLY_CORRECT=1 ;;
+         *) { POSIXLY_CORRECT=; unset POSIXLY_CORRECT;} ;;
+       esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_getopt_gnu" >&5
+printf "%s\n" "$gl_cv_func_getopt_gnu" >&6; }
+    if test "$gl_cv_func_getopt_gnu" != yes; then
+      gl_replace_getopt=yes
+    else
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working GNU getopt_long function" >&5
+printf %s "checking for working GNU getopt_long function... " >&6; }
+if test ${gl_cv_func_getopt_long_gnu+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+              case "$host_os" in
+              openbsd*) gl_cv_func_getopt_long_gnu="guessing no";;
+              *)        gl_cv_func_getopt_long_gnu="guessing yes";;
+            esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <getopt.h>
+                #include <stddef.h>
+                #include <string.h>
+
+int
+main (void)
+{
+static const struct option long_options[] =
+                  {
+                    { "xtremely-",no_argument,       NULL, 1003 },
+                    { "xtra",     no_argument,       NULL, 1001 },
+                    { "xtreme",   no_argument,       NULL, 1002 },
+                    { "xtremely", no_argument,       NULL, 1003 },
+                    { NULL,       0,                 NULL, 0 }
+                  };
+                /* This code fails on OpenBSD 5.0.  */
+                {
+                  static char program[] = "program";
+                  static char xtremel[] = "--xtremel";
+                  char *argv[] = { program, xtremel, NULL };
+                  int option_index;
+                  optind = 1; opterr = 0;
+                  if (getopt_long (2, argv, "", long_options, &option_index) != 1003)
+                    return 1;
+                }
+                return 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_getopt_long_gnu=yes
+else $as_nop
+  gl_cv_func_getopt_long_gnu=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_getopt_long_gnu" >&5
+printf "%s\n" "$gl_cv_func_getopt_long_gnu" >&6; }
+      case "$gl_cv_func_getopt_long_gnu" in
+        *yes) ;;
+        *) gl_replace_getopt=yes ;;
+      esac
+    fi
+  fi
+
+
+
+
+
+
+
+
+  if test -z "$gl_pthreadlib_body_done"; then
+    gl_pthread_api=no
+    LIBPTHREAD=
+    LIBPMULTITHREAD=
+    # On OSF/1, the compiler needs the flag -pthread or -D_REENTRANT so that
+    # it groks <pthread.h>. It's added above, in gl_ANYTHREADLIB_EARLY.
+    ac_fn_c_check_header_compile "$LINENO" "pthread.h" "ac_cv_header_pthread_h" "$ac_includes_default"
+if test "x$ac_cv_header_pthread_h" = xyes
+then :
+  gl_have_pthread_h=yes
+else $as_nop
+  gl_have_pthread_h=no
+fi
+
+    if test "$gl_have_pthread_h" = yes; then
+      # Other possible tests:
+      #   -lpthreads (FSU threads, PCthreads)
+      #   -lgthreads
+      # Test whether both pthread_mutex_lock and pthread_mutexattr_init exist
+      # in libc. IRIX 6.5 has the first one in both libc and libpthread, but
+      # the second one only in libpthread, and lock.c needs it.
+      #
+      # If -pthread works, prefer it to -lpthread, since Ubuntu 14.04
+      # needs -pthread for some reason.  See:
+      # https://lists.gnu.org/r/bug-gnulib/2014-09/msg00023.html
+      save_LIBS=$LIBS
+      for gl_pthread in '' '-pthread'; do
+        LIBS="$LIBS $gl_pthread"
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pthread.h>
+               pthread_mutex_t m;
+               pthread_mutexattr_t ma;
+
+int
+main (void)
+{
+pthread_mutex_lock (&m);
+               pthread_mutexattr_init (&ma);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_pthread_api=yes
+           LIBPTHREAD=$gl_pthread
+           LIBPMULTITHREAD=$gl_pthread
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+        LIBS=$save_LIBS
+        test $gl_pthread_api = yes && break
+      done
+      echo "$as_me:13017: gl_pthread_api=$gl_pthread_api" >&5
+      echo "$as_me:13018: LIBPTHREAD=$LIBPTHREAD" >&5
+
+      gl_pthread_in_glibc=no
+      # On Linux with glibc >= 2.34, libc contains the fully functional
+      # pthread functions.
+      case "$host_os" in
+        linux*)
+          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <features.h>
+             #ifdef __GNU_LIBRARY__
+              #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 34) || (__GLIBC__ > 2)
+               Lucky user
+              #endif
+             #endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Lucky user" >/dev/null 2>&1
+then :
+  gl_pthread_in_glibc=yes
+fi
+rm -rf conftest*
+
+          ;;
+      esac
+      echo "$as_me:13044: gl_pthread_in_glibc=$gl_pthread_in_glibc" >&5
+
+      # Test for libpthread by looking for pthread_kill. (Not pthread_self,
+      # since it is defined as a macro on OSF/1.)
+      if test $gl_pthread_api = yes && test -z "$LIBPTHREAD"; then
+        # The program links fine without libpthread. But it may actually
+        # need to link with libpthread in order to create multiple threads.
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pthread_kill in -lpthread" >&5
+printf %s "checking for pthread_kill in -lpthread... " >&6; }
+if test ${ac_cv_lib_pthread_pthread_kill+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lpthread  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char pthread_kill ();
+int
+main (void)
+{
+return pthread_kill ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_pthread_pthread_kill=yes
+else $as_nop
+  ac_cv_lib_pthread_pthread_kill=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_pthread_pthread_kill" >&5
+printf "%s\n" "$ac_cv_lib_pthread_pthread_kill" >&6; }
+if test "x$ac_cv_lib_pthread_pthread_kill" = xyes
+then :
+  if test $gl_pthread_in_glibc = yes; then
+             LIBPMULTITHREAD=
+           else
+             LIBPMULTITHREAD=-lpthread
+             # On Solaris and HP-UX, most pthread functions exist also in libc.
+             # Therefore pthread_in_use() needs to actually try to create a
+             # thread: pthread_create from libc will fail, whereas
+             # pthread_create will actually create a thread.
+             # On Solaris 10 or newer, this test is no longer needed, because
+             # libc contains the fully functional pthread functions.
+             case "$host_os" in
+               solaris | solaris2.1-9 | solaris2.1-9.* | hpux*)
+
+printf "%s\n" "#define PTHREAD_IN_USE_DETECTION_HARD 1" >>confdefs.h
+
+             esac
+           fi
+
+fi
+
+      elif test $gl_pthread_api != yes; then
+        # Some library is needed. Try libpthread and libc_r.
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pthread_kill in -lpthread" >&5
+printf %s "checking for pthread_kill in -lpthread... " >&6; }
+if test ${ac_cv_lib_pthread_pthread_kill+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lpthread  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char pthread_kill ();
+int
+main (void)
+{
+return pthread_kill ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_pthread_pthread_kill=yes
+else $as_nop
+  ac_cv_lib_pthread_pthread_kill=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_pthread_pthread_kill" >&5
+printf "%s\n" "$ac_cv_lib_pthread_pthread_kill" >&6; }
+if test "x$ac_cv_lib_pthread_pthread_kill" = xyes
+then :
+  gl_pthread_api=yes
+           LIBPTHREAD=-lpthread
+           LIBPMULTITHREAD=-lpthread
+fi
+
+        if test $gl_pthread_api != yes; then
+          # For FreeBSD 4.
+          { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pthread_kill in -lc_r" >&5
+printf %s "checking for pthread_kill in -lc_r... " >&6; }
+if test ${ac_cv_lib_c_r_pthread_kill+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lc_r  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char pthread_kill ();
+int
+main (void)
+{
+return pthread_kill ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_c_r_pthread_kill=yes
+else $as_nop
+  ac_cv_lib_c_r_pthread_kill=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_c_r_pthread_kill" >&5
+printf "%s\n" "$ac_cv_lib_c_r_pthread_kill" >&6; }
+if test "x$ac_cv_lib_c_r_pthread_kill" = xyes
+then :
+  gl_pthread_api=yes
+             LIBPTHREAD=-lc_r
+             LIBPMULTITHREAD=-lc_r
+fi
+
+        fi
+      fi
+      echo "$as_me:13198: LIBPMULTITHREAD=$LIBPMULTITHREAD" >&5
+    fi
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether POSIX threads API is available" >&5
+printf %s "checking whether POSIX threads API is available... " >&6; }
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_pthread_api" >&5
+printf "%s\n" "$gl_pthread_api" >&6; }
+
+
+    if test $gl_pthread_api = yes; then
+
+printf "%s\n" "#define HAVE_PTHREAD_API 1" >>confdefs.h
+
+    fi
+
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sched.h>
+int
+main (void)
+{
+sched_yield ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  LIB_SCHED_YIELD=
+
+else $as_nop
+         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for sched_yield in -lrt" >&5
+printf %s "checking for sched_yield in -lrt... " >&6; }
+if test ${ac_cv_lib_rt_sched_yield+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lrt  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char sched_yield ();
+int
+main (void)
+{
+return sched_yield ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_rt_sched_yield=yes
+else $as_nop
+  ac_cv_lib_rt_sched_yield=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_rt_sched_yield" >&5
+printf "%s\n" "$ac_cv_lib_rt_sched_yield" >&6; }
+if test "x$ac_cv_lib_rt_sched_yield" = xyes
+then :
+  LIB_SCHED_YIELD=-lrt
+else $as_nop
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for sched_yield in -lposix4" >&5
+printf %s "checking for sched_yield in -lposix4... " >&6; }
+if test ${ac_cv_lib_posix4_sched_yield+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lposix4  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char sched_yield ();
+int
+main (void)
+{
+return sched_yield ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_posix4_sched_yield=yes
+else $as_nop
+  ac_cv_lib_posix4_sched_yield=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_posix4_sched_yield" >&5
+printf "%s\n" "$ac_cv_lib_posix4_sched_yield" >&6; }
+if test "x$ac_cv_lib_posix4_sched_yield" = xyes
+then :
+  LIB_SCHED_YIELD=-lposix4
+fi
+
+fi
+
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+
+
+    gl_pthreadlib_body_done=done
+  fi
+
+
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether setlocale (LC_ALL, NULL) is multithread-safe" >&5
+printf %s "checking whether setlocale (LC_ALL, NULL) is multithread-safe... " >&6; }
+if test ${gl_cv_func_setlocale_null_all_mtsafe+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  case "$host_os" in
+       # Guess no on musl libc, macOS, FreeBSD, NetBSD, OpenBSD, AIX, Haiku, Cygwin.
+       *-musl* | darwin* | freebsd* | midnightbsd* | netbsd* | openbsd* | aix* | haiku* | cygwin*)
+         gl_cv_func_setlocale_null_all_mtsafe=no ;;
+       # Guess yes on glibc, HP-UX, IRIX, Solaris, native Windows.
+       *-gnu* | gnu* | hpux* | irix* | solaris* | mingw*)
+         gl_cv_func_setlocale_null_all_mtsafe=yes ;;
+       # If we don't know, obey --enable-cross-guesses.
+       *)
+         gl_cv_func_setlocale_null_all_mtsafe="$gl_cross_guess_normal" ;;
+     esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_setlocale_null_all_mtsafe" >&5
+printf "%s\n" "$gl_cv_func_setlocale_null_all_mtsafe" >&6; }
+    case "$host_os" in
+    mingw*) ;;
+    *)
+      if test $gl_pthread_api = no && test $ac_cv_header_threads_h = no; then
+        gl_cv_func_setlocale_null_all_mtsafe="trivially yes"
+      fi
+      ;;
+  esac
+  case "$gl_cv_func_setlocale_null_all_mtsafe" in
+    *yes) SETLOCALE_NULL_ALL_MTSAFE=1 ;;
+    *)    SETLOCALE_NULL_ALL_MTSAFE=0 ;;
+  esac
+
+printf "%s\n" "#define SETLOCALE_NULL_ALL_MTSAFE $SETLOCALE_NULL_ALL_MTSAFE" >>confdefs.h
+
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether setlocale (category, NULL) is multithread-safe" >&5
+printf %s "checking whether setlocale (category, NULL) is multithread-safe... " >&6; }
+if test ${gl_cv_func_setlocale_null_one_mtsafe+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  case "$host_os" in
+       # Guess no on OpenBSD, AIX.
+       openbsd* | aix*)
+         gl_cv_func_setlocale_null_one_mtsafe=no ;;
+       # Guess yes on glibc, musl libc, macOS, FreeBSD, NetBSD, HP-UX, IRIX, Solaris, Haiku, Cygwin, native Windows.
+       *-gnu* | gnu* | *-musl* | darwin* | freebsd* | midnightbsd* | netbsd* | hpux* | irix* | solaris* | haiku* | cygwin* | mingw*)
+         gl_cv_func_setlocale_null_one_mtsafe=yes ;;
+       # If we don't know, obey --enable-cross-guesses.
+       *)
+         gl_cv_func_setlocale_null_one_mtsafe="$gl_cross_guess_normal" ;;
+     esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_setlocale_null_one_mtsafe" >&5
+printf "%s\n" "$gl_cv_func_setlocale_null_one_mtsafe" >&6; }
+    case "$host_os" in
+    mingw*) ;;
+    *)
+      if test $gl_pthread_api = no && test $ac_cv_header_threads_h = no; then
+        gl_cv_func_setlocale_null_one_mtsafe="trivially yes"
+      fi
+      ;;
+  esac
+  case "$gl_cv_func_setlocale_null_one_mtsafe" in
+    *yes) SETLOCALE_NULL_ONE_MTSAFE=1 ;;
+    *)    SETLOCALE_NULL_ONE_MTSAFE=0 ;;
+  esac
+
+printf "%s\n" "#define SETLOCALE_NULL_ONE_MTSAFE $SETLOCALE_NULL_ONE_MTSAFE" >>confdefs.h
+
+
+    if test $SETLOCALE_NULL_ALL_MTSAFE = 0 || test $SETLOCALE_NULL_ONE_MTSAFE = 0; then
+    case "$host_os" in
+      mingw*) LIB_SETLOCALE_NULL= ;;
+      *)
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether imported symbols can be declared weak" >&5
+printf %s "checking whether imported symbols can be declared weak... " >&6; }
+if test ${gl_cv_have_weak+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_cv_have_weak=no
+          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+extern void xyzzy ();
+#pragma weak xyzzy
+int
+main (void)
+{
+xyzzy();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_have_weak=maybe
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+     if test $gl_cv_have_weak = maybe; then
+                     if test "$cross_compiling" = yes
+then :
+                      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef __ELF__
+             Extensible Linking Format
+             #endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Extensible Linking Format" >/dev/null 2>&1
+then :
+  gl_cv_have_weak="guessing yes"
+else $as_nop
+  gl_cv_have_weak="guessing no"
+fi
+rm -rf conftest*
+
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdio.h>
+#pragma weak fputs
+int main ()
+{
+  return (fputs == NULL);
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_have_weak=yes
+else $as_nop
+  gl_cv_have_weak=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+     fi
+          case " $LDFLAGS " in
+       *" -static "*) gl_cv_have_weak=no ;;
+     esac
+                    case "$gl_cv_have_weak" in
+       *yes)
+         case "$host_os" in
+           freebsd* | dragonfly* | midnightbsd*)
+             : > conftest1.c
+             $CC $CPPFLAGS $CFLAGS $LDFLAGS -fPIC -shared -o libempty.so conftest1.c -lpthread >&5 2>&1
+             cat <<EOF > conftest2.c
+#include <pthread.h>
+#pragma weak pthread_mutexattr_gettype
+int main ()
+{
+  return (pthread_mutexattr_gettype != NULL);
+}
+EOF
+             $CC $CPPFLAGS $CFLAGS $LDFLAGS -o conftest conftest2.c libempty.so >&5 2>&1 \
+               || gl_cv_have_weak=no
+             rm -f conftest1.c libempty.so conftest2.c conftest
+             ;;
+         esac
+         ;;
+     esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_have_weak" >&5
+printf "%s\n" "$gl_cv_have_weak" >&6; }
+  case "$gl_cv_have_weak" in
+    *yes)
+
+printf "%s\n" "#define HAVE_WEAK_SYMBOLS 1" >>confdefs.h
+
+      ;;
+  esac
+
+        case "$gl_cv_have_weak" in
+          *yes) LIB_SETLOCALE_NULL= ;;
+          *)    LIB_SETLOCALE_NULL="$LIBPTHREAD" ;;
+        esac
+        ;;
+    esac
+  else
+    LIB_SETLOCALE_NULL=
+  fi
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#ifdef _MSC_VER
+MicrosoftCompiler
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "MicrosoftCompiler" >/dev/null 2>&1
+then :
+            rm -f conftest*
+     echo 'int dummy;' > conftest.c
+     { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; } >/dev/null 2>&1
+     if test -f conftest.o; then
+       gl_asmext='s'
+       gl_c_asm_opt='-S'
+     else
+       gl_asmext='asm'
+       gl_c_asm_opt='-c -Fa'
+     fi
+     rm -f conftest*
+
+else $as_nop
+  gl_asmext='s'
+     gl_c_asm_opt='-S'
+
+fi
+rm -rf conftest*
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking host CPU and C ABI" >&5
+printf %s "checking host CPU and C ABI... " >&6; }
+if test ${gl_cv_host_cpu_c_abi+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  case "$host_cpu" in
+
+       i[34567]86 )
+         gl_cv_host_cpu_c_abi=i386
+         ;;
+
+       x86_64 )
+         # On x86_64 systems, the C compiler may be generating code in one of
+         # these ABIs:
+         # - 64-bit instruction set, 64-bit pointers, 64-bit 'long': x86_64.
+         # - 64-bit instruction set, 64-bit pointers, 32-bit 'long': x86_64
+         #   with native Windows (mingw, MSVC).
+         # - 64-bit instruction set, 32-bit pointers, 32-bit 'long': x86_64-x32.
+         # - 32-bit instruction set, 32-bit pointers, 32-bit 'long': i386.
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if (defined __x86_64__ || defined __amd64__ \
+                     || defined _M_X64 || defined _M_AMD64)
+                 int ok;
+                #else
+                 error fail
+                #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __ILP32__ || defined _ILP32
+                    int ok;
+                   #else
+                    error fail
+                   #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi=x86_64-x32
+else $as_nop
+  gl_cv_host_cpu_c_abi=x86_64
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+else $as_nop
+  gl_cv_host_cpu_c_abi=i386
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+         ;;
+
+       alphaev[4-8] | alphaev56 | alphapca5[67] | alphaev6[78] )
+         gl_cv_host_cpu_c_abi=alpha
+         ;;
+
+       arm* | aarch64 )
+         # Assume arm with EABI.
+         # On arm64 systems, the C compiler may be generating code in one of
+         # these ABIs:
+         # - aarch64 instruction set, 64-bit pointers, 64-bit 'long': arm64.
+         # - aarch64 instruction set, 32-bit pointers, 32-bit 'long': arm64-ilp32.
+         # - 32-bit instruction set, 32-bit pointers, 32-bit 'long': arm or armhf.
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef __aarch64__
+                 int ok;
+                #else
+                 error fail
+                #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __ILP32__ || defined _ILP32
+                   int ok;
+                  #else
+                   error fail
+                  #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi=arm64-ilp32
+else $as_nop
+  gl_cv_host_cpu_c_abi=arm64
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+else $as_nop
+  # Don't distinguish little-endian and big-endian arm, since they
+            # don't require different machine code for simple operations and
+            # since the user can distinguish them through the preprocessor
+            # defines __ARMEL__ vs. __ARMEB__.
+            # But distinguish arm which passes floating-point arguments and
+            # return values in integer registers (r0, r1, ...) - this is
+            # gcc -mfloat-abi=soft or gcc -mfloat-abi=softfp - from arm which
+            # passes them in float registers (s0, s1, ...) and double registers
+            # (d0, d1, ...) - this is gcc -mfloat-abi=hard. GCC 4.6 or newer
+            # sets the preprocessor defines __ARM_PCS (for the first case) and
+            # __ARM_PCS_VFP (for the second case), but older GCC does not.
+            echo 'double ddd; void func (double dd) { ddd = dd; }' > conftest.c
+            # Look for a reference to the register d0 in the .s file.
+            { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $gl_c_asm_opt conftest.c'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; } >/dev/null 2>&1
+            if LC_ALL=C grep 'd0,' conftest.$gl_asmext >/dev/null; then
+              gl_cv_host_cpu_c_abi=armhf
+            else
+              gl_cv_host_cpu_c_abi=arm
+            fi
+            rm -f conftest*
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+         ;;
+
+       hppa1.0 | hppa1.1 | hppa2.0* | hppa64 )
+         # On hppa, the C compiler may be generating 32-bit code or 64-bit
+         # code. In the latter case, it defines _LP64 and __LP64__.
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef __LP64__
+                 int ok;
+                #else
+                 error fail
+                #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi=hppa64
+else $as_nop
+  gl_cv_host_cpu_c_abi=hppa
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+         ;;
+
+       ia64* )
+         # On ia64 on HP-UX, the C compiler may be generating 64-bit code or
+         # 32-bit code. In the latter case, it defines _ILP32.
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef _ILP32
+                 int ok;
+                #else
+                 error fail
+                #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi=ia64-ilp32
+else $as_nop
+  gl_cv_host_cpu_c_abi=ia64
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+         ;;
+
+       mips* )
+         # We should also check for (_MIPS_SZPTR == 64), but gcc keeps this
+         # at 32.
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined _MIPS_SZLONG && (_MIPS_SZLONG == 64)
+                 int ok;
+                #else
+                 error fail
+                #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi=mips64
+else $as_nop
+  # In the n32 ABI, _ABIN32 is defined, _ABIO32 is not defined (but
+            # may later get defined by <sgidefs.h>), and _MIPS_SIM == _ABIN32.
+            # In the 32 ABI, _ABIO32 is defined, _ABIN32 is not defined (but
+            # may later get defined by <sgidefs.h>), and _MIPS_SIM == _ABIO32.
+            cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if (_MIPS_SIM == _ABIN32)
+                    int ok;
+                   #else
+                    error fail
+                   #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi=mipsn32
+else $as_nop
+  gl_cv_host_cpu_c_abi=mips
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+         ;;
+
+       powerpc* )
+         # Different ABIs are in use on AIX vs. Mac OS X vs. Linux,*BSD.
+         # No need to distinguish them here; the caller may distinguish
+         # them based on the OS.
+         # On powerpc64 systems, the C compiler may still be generating
+         # 32-bit code. And on powerpc-ibm-aix systems, the C compiler may
+         # be generating 64-bit code.
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __powerpc64__ || defined __LP64__
+                 int ok;
+                #else
+                 error fail
+                #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  # On powerpc64, there are two ABIs on Linux: The AIX compatible
+            # one and the ELFv2 one. The latter defines _CALL_ELF=2.
+            cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined _CALL_ELF && _CALL_ELF == 2
+                    int ok;
+                   #else
+                    error fail
+                   #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi=powerpc64-elfv2
+else $as_nop
+  gl_cv_host_cpu_c_abi=powerpc64
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+else $as_nop
+  gl_cv_host_cpu_c_abi=powerpc
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+         ;;
+
+       rs6000 )
+         gl_cv_host_cpu_c_abi=powerpc
+         ;;
+
+       riscv32 | riscv64 )
+         # There are 2 architectures (with variants): rv32* and rv64*.
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if __riscv_xlen == 64
+                  int ok;
+                #else
+                  error fail
+                #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  cpu=riscv64
+else $as_nop
+  cpu=riscv32
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+         # There are 6 ABIs: ilp32, ilp32f, ilp32d, lp64, lp64f, lp64d.
+         # Size of 'long' and 'void *':
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __LP64__
+                  int ok;
+                #else
+                  error fail
+                #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  main_abi=lp64
+else $as_nop
+  main_abi=ilp32
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+         # Float ABIs:
+         # __riscv_float_abi_double:
+         #   'float' and 'double' are passed in floating-point registers.
+         # __riscv_float_abi_single:
+         #   'float' are passed in floating-point registers.
+         # __riscv_float_abi_soft:
+         #   No values are passed in floating-point registers.
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __riscv_float_abi_double
+                  int ok;
+                #else
+                  error fail
+                #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  float_abi=d
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __riscv_float_abi_single
+                     int ok;
+                   #else
+                     error fail
+                   #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  float_abi=f
+else $as_nop
+  float_abi=''
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+         gl_cv_host_cpu_c_abi="${cpu}-${main_abi}${float_abi}"
+         ;;
+
+       s390* )
+         # On s390x, the C compiler may be generating 64-bit (= s390x) code
+         # or 31-bit (= s390) code.
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __LP64__ || defined __s390x__
+                  int ok;
+                #else
+                  error fail
+                #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi=s390x
+else $as_nop
+  gl_cv_host_cpu_c_abi=s390
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+         ;;
+
+       sparc | sparc64 )
+         # UltraSPARCs running Linux have `uname -m` = "sparc64", but the
+         # C compiler still generates 32-bit code.
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __sparcv9 || defined __arch64__
+                 int ok;
+                #else
+                 error fail
+                #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi=sparc64
+else $as_nop
+  gl_cv_host_cpu_c_abi=sparc
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+         ;;
+
+       *)
+         gl_cv_host_cpu_c_abi="$host_cpu"
+         ;;
+     esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_host_cpu_c_abi" >&5
+printf "%s\n" "$gl_cv_host_cpu_c_abi" >&6; }
+
+    HOST_CPU=`echo "$gl_cv_host_cpu_c_abi" | sed -e 's/-.*//'`
+  HOST_CPU_C_ABI="$gl_cv_host_cpu_c_abi"
+
+
+
+  # This was
+  #   AC_DEFINE_UNQUOTED([__${HOST_CPU}__])
+  #   AC_DEFINE_UNQUOTED([__${HOST_CPU_C_ABI}__])
+  # earlier, but KAI C++ 3.2d doesn't like this.
+  sed -e 's/-/_/g' >> confdefs.h <<EOF
+#ifndef __${HOST_CPU}__
+#define __${HOST_CPU}__ 1
+#endif
+#ifndef __${HOST_CPU_C_ABI}__
+#define __${HOST_CPU_C_ABI}__ 1
+#endif
+EOF
+
+
+
+
+      if test "X$prefix" = "XNONE"; then
+    acl_final_prefix="$ac_default_prefix"
+  else
+    acl_final_prefix="$prefix"
+  fi
+  if test "X$exec_prefix" = "XNONE"; then
+    acl_final_exec_prefix='${prefix}'
+  else
+    acl_final_exec_prefix="$exec_prefix"
+  fi
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  eval acl_final_exec_prefix=\"$acl_final_exec_prefix\"
+  prefix="$acl_save_prefix"
+
+
+
+# Check whether --with-gnu-ld was given.
+if test ${with_gnu_ld+y}
+then :
+  withval=$with_gnu_ld; test "$withval" = no || with_gnu_ld=yes
+else $as_nop
+  with_gnu_ld=no
+fi
+
+# Prepare PATH_SEPARATOR.
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+  # Determine PATH_SEPARATOR by trying to find /bin/sh in a PATH which
+  # contains only /bin. Note that ksh looks also at the FPATH variable,
+  # so we have to set that as well for the test.
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+    && { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+           || PATH_SEPARATOR=';'
+       }
+fi
+
+if test -n "$LD"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ld" >&5
+printf %s "checking for ld... " >&6; }
+elif test "$GCC" = yes; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ld used by $CC" >&5
+printf %s "checking for ld used by $CC... " >&6; }
+elif test "$with_gnu_ld" = yes; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for GNU ld" >&5
+printf %s "checking for GNU ld... " >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for non-GNU ld" >&5
+printf %s "checking for non-GNU ld... " >&6; }
+fi
+if test -n "$LD"; then
+  # Let the user override the test with a path.
+  :
+else
+  if test ${acl_cv_path_LD+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    acl_cv_path_LD= # Final result of this test
+    ac_prog=ld # Program to search in $PATH
+    if test "$GCC" = yes; then
+      # Check if gcc -print-prog-name=ld gives a path.
+      case $host in
+        *-*-mingw*)
+          # gcc leaves a trailing carriage return which upsets mingw
+          acl_output=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
+        *)
+          acl_output=`($CC -print-prog-name=ld) 2>&5` ;;
+      esac
+      case $acl_output in
+        # Accept absolute paths.
+        [\\/]* | ?:[\\/]*)
+          re_direlt='/[^/][^/]*/\.\./'
+          # Canonicalize the pathname of ld
+          acl_output=`echo "$acl_output" | sed 's%\\\\%/%g'`
+          while echo "$acl_output" | grep "$re_direlt" > /dev/null 2>&1; do
+            acl_output=`echo $acl_output | sed "s%$re_direlt%/%"`
+          done
+          # Got the pathname. No search in PATH is needed.
+          acl_cv_path_LD="$acl_output"
+          ac_prog=
+          ;;
+        "")
+          # If it fails, then pretend we aren't using GCC.
+          ;;
+        *)
+          # If it is relative, then search for the first ld in PATH.
+          with_gnu_ld=unknown
+          ;;
+      esac
+    fi
+    if test -n "$ac_prog"; then
+      # Search for $ac_prog in $PATH.
+      acl_save_ifs="$IFS"; IFS=$PATH_SEPARATOR
+      for ac_dir in $PATH; do
+        IFS="$acl_save_ifs"
+        test -z "$ac_dir" && ac_dir=.
+        if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
+          acl_cv_path_LD="$ac_dir/$ac_prog"
+          # Check to see if the program is GNU ld.  I'd rather use --version,
+          # but apparently some variants of GNU ld only accept -v.
+          # Break only if it was the GNU/non-GNU ld that we prefer.
+          case `"$acl_cv_path_LD" -v 2>&1 </dev/null` in
+            *GNU* | *'with BFD'*)
+              test "$with_gnu_ld" != no && break
+              ;;
+            *)
+              test "$with_gnu_ld" != yes && break
+              ;;
+          esac
+        fi
+      done
+      IFS="$acl_save_ifs"
+    fi
+    case $host in
+      *-*-aix*)
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __powerpc64__ || defined __LP64__
+                int ok;
+               #else
+                error fail
+               #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  # The compiler produces 64-bit code. Add option '-b64' so that the
+           # linker groks 64-bit object files.
+           case "$acl_cv_path_LD " in
+             *" -b64 "*) ;;
+             *) acl_cv_path_LD="$acl_cv_path_LD -b64" ;;
+           esac
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+        ;;
+      sparc64-*-netbsd*)
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __sparcv9 || defined __arch64__
+                int ok;
+               #else
+                error fail
+               #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+
+else $as_nop
+  # The compiler produces 32-bit code. Add option '-m elf32_sparc'
+           # so that the linker groks 32-bit object files.
+           case "$acl_cv_path_LD " in
+             *" -m elf32_sparc "*) ;;
+             *) acl_cv_path_LD="$acl_cv_path_LD -m elf32_sparc" ;;
+           esac
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+        ;;
+    esac
+
+fi
+
+  LD="$acl_cv_path_LD"
+fi
+if test -n "$LD"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LD" >&5
+printf "%s\n" "$LD" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+  as_fn_error $? "no acceptable ld found in \$PATH" "$LINENO" 5
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if the linker ($LD) is GNU ld" >&5
+printf %s "checking if the linker ($LD) is GNU ld... " >&6; }
+if test ${acl_cv_prog_gnu_ld+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  # I'd rather use --version here, but apparently some GNU lds only accept -v.
+case `$LD -v 2>&1 </dev/null` in
+*GNU* | *'with BFD'*)
+  acl_cv_prog_gnu_ld=yes
+  ;;
+*)
+  acl_cv_prog_gnu_ld=no
+  ;;
+esac
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $acl_cv_prog_gnu_ld" >&5
+printf "%s\n" "$acl_cv_prog_gnu_ld" >&6; }
+with_gnu_ld=$acl_cv_prog_gnu_ld
+
+
+
+
+
+                                                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for shared library run path origin" >&5
+printf %s "checking for shared library run path origin... " >&6; }
+if test ${acl_cv_rpath+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    CC="$CC" GCC="$GCC" LDFLAGS="$LDFLAGS" LD="$LD" with_gnu_ld="$with_gnu_ld" \
+    ${CONFIG_SHELL-/bin/sh} "$ac_aux_dir/config.rpath" "$host" > conftest.sh
+    . ./conftest.sh
+    rm -f ./conftest.sh
+    acl_cv_rpath=done
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $acl_cv_rpath" >&5
+printf "%s\n" "$acl_cv_rpath" >&6; }
+  wl="$acl_cv_wl"
+  acl_libext="$acl_cv_libext"
+  acl_shlibext="$acl_cv_shlibext"
+  acl_libname_spec="$acl_cv_libname_spec"
+  acl_library_names_spec="$acl_cv_library_names_spec"
+  acl_hardcode_libdir_flag_spec="$acl_cv_hardcode_libdir_flag_spec"
+  acl_hardcode_libdir_separator="$acl_cv_hardcode_libdir_separator"
+  acl_hardcode_direct="$acl_cv_hardcode_direct"
+  acl_hardcode_minus_L="$acl_cv_hardcode_minus_L"
+    # Check whether --enable-rpath was given.
+if test ${enable_rpath+y}
+then :
+  enableval=$enable_rpath; :
+else $as_nop
+  enable_rpath=yes
+fi
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking 32-bit host C ABI" >&5
+printf %s "checking 32-bit host C ABI... " >&6; }
+if test ${gl_cv_host_cpu_c_abi_32bit+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$gl_cv_host_cpu_c_abi"; then
+       case "$gl_cv_host_cpu_c_abi" in
+         i386 | x86_64-x32 | arm | armhf | arm64-ilp32 | hppa | ia64-ilp32 | mips | mipsn32 | powerpc | riscv*-ilp32* | s390 | sparc)
+           gl_cv_host_cpu_c_abi_32bit=yes ;;
+         x86_64 | alpha | arm64 | hppa64 | ia64 | mips64 | powerpc64 | powerpc64-elfv2 | riscv*-lp64* | s390x | sparc64 )
+           gl_cv_host_cpu_c_abi_32bit=no ;;
+         *)
+           gl_cv_host_cpu_c_abi_32bit=unknown ;;
+       esac
+     else
+       case "$host_cpu" in
+
+         # CPUs that only support a 32-bit ABI.
+         arc \
+         | bfin \
+         | cris* \
+         | csky \
+         | epiphany \
+         | ft32 \
+         | h8300 \
+         | m68k \
+         | microblaze | microblazeel \
+         | nds32 | nds32le | nds32be \
+         | nios2 | nios2eb | nios2el \
+         | or1k* \
+         | or32 \
+         | sh | sh1234 | sh1234elb \
+         | tic6x \
+         | xtensa* )
+           gl_cv_host_cpu_c_abi_32bit=yes
+           ;;
+
+         # CPUs that only support a 64-bit ABI.
+         alpha | alphaev[4-8] | alphaev56 | alphapca5[67] | alphaev6[78] \
+         | mmix )
+           gl_cv_host_cpu_c_abi_32bit=no
+           ;;
+
+         i[34567]86 )
+           gl_cv_host_cpu_c_abi_32bit=yes
+           ;;
+
+         x86_64 )
+           # On x86_64 systems, the C compiler may be generating code in one of
+           # these ABIs:
+           # - 64-bit instruction set, 64-bit pointers, 64-bit 'long': x86_64.
+           # - 64-bit instruction set, 64-bit pointers, 32-bit 'long': x86_64
+           #   with native Windows (mingw, MSVC).
+           # - 64-bit instruction set, 32-bit pointers, 32-bit 'long': x86_64-x32.
+           # - 32-bit instruction set, 32-bit pointers, 32-bit 'long': i386.
+           cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if (defined __x86_64__ || defined __amd64__ \
+                       || defined _M_X64 || defined _M_AMD64) \
+                      && !(defined __ILP32__ || defined _ILP32)
+                   int ok;
+                  #else
+                   error fail
+                  #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi_32bit=no
+else $as_nop
+  gl_cv_host_cpu_c_abi_32bit=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+           ;;
+
+         arm* | aarch64 )
+           # Assume arm with EABI.
+           # On arm64 systems, the C compiler may be generating code in one of
+           # these ABIs:
+           # - aarch64 instruction set, 64-bit pointers, 64-bit 'long': arm64.
+           # - aarch64 instruction set, 32-bit pointers, 32-bit 'long': arm64-ilp32.
+           # - 32-bit instruction set, 32-bit pointers, 32-bit 'long': arm or armhf.
+           cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __aarch64__ && !(defined __ILP32__ || defined _ILP32)
+                   int ok;
+                  #else
+                   error fail
+                  #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi_32bit=no
+else $as_nop
+  gl_cv_host_cpu_c_abi_32bit=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+           ;;
+
+         hppa1.0 | hppa1.1 | hppa2.0* | hppa64 )
+           # On hppa, the C compiler may be generating 32-bit code or 64-bit
+           # code. In the latter case, it defines _LP64 and __LP64__.
+           cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef __LP64__
+                   int ok;
+                  #else
+                   error fail
+                  #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi_32bit=no
+else $as_nop
+  gl_cv_host_cpu_c_abi_32bit=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+           ;;
+
+         ia64* )
+           # On ia64 on HP-UX, the C compiler may be generating 64-bit code or
+           # 32-bit code. In the latter case, it defines _ILP32.
+           cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef _ILP32
+                   int ok;
+                  #else
+                   error fail
+                  #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi_32bit=yes
+else $as_nop
+  gl_cv_host_cpu_c_abi_32bit=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+           ;;
+
+         mips* )
+           # We should also check for (_MIPS_SZPTR == 64), but gcc keeps this
+           # at 32.
+           cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined _MIPS_SZLONG && (_MIPS_SZLONG == 64)
+                   int ok;
+                  #else
+                   error fail
+                  #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi_32bit=no
+else $as_nop
+  gl_cv_host_cpu_c_abi_32bit=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+           ;;
+
+         powerpc* )
+           # Different ABIs are in use on AIX vs. Mac OS X vs. Linux,*BSD.
+           # No need to distinguish them here; the caller may distinguish
+           # them based on the OS.
+           # On powerpc64 systems, the C compiler may still be generating
+           # 32-bit code. And on powerpc-ibm-aix systems, the C compiler may
+           # be generating 64-bit code.
+           cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __powerpc64__ || defined __LP64__
+                   int ok;
+                  #else
+                   error fail
+                  #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi_32bit=no
+else $as_nop
+  gl_cv_host_cpu_c_abi_32bit=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+           ;;
+
+         rs6000 )
+           gl_cv_host_cpu_c_abi_32bit=yes
+           ;;
+
+         riscv32 | riscv64 )
+           # There are 6 ABIs: ilp32, ilp32f, ilp32d, lp64, lp64f, lp64d.
+           # Size of 'long' and 'void *':
+           cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __LP64__
+                    int ok;
+                  #else
+                    error fail
+                  #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi_32bit=no
+else $as_nop
+  gl_cv_host_cpu_c_abi_32bit=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+           ;;
+
+         s390* )
+           # On s390x, the C compiler may be generating 64-bit (= s390x) code
+           # or 31-bit (= s390) code.
+           cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __LP64__ || defined __s390x__
+                    int ok;
+                  #else
+                    error fail
+                  #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi_32bit=no
+else $as_nop
+  gl_cv_host_cpu_c_abi_32bit=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+           ;;
+
+         sparc | sparc64 )
+           # UltraSPARCs running Linux have `uname -m` = "sparc64", but the
+           # C compiler still generates 32-bit code.
+           cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __sparcv9 || defined __arch64__
+                   int ok;
+                  #else
+                   error fail
+                  #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_host_cpu_c_abi_32bit=no
+else $as_nop
+  gl_cv_host_cpu_c_abi_32bit=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+           ;;
+
+         *)
+           gl_cv_host_cpu_c_abi_32bit=unknown
+           ;;
+       esac
+     fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_host_cpu_c_abi_32bit" >&5
+printf "%s\n" "$gl_cv_host_cpu_c_abi_32bit" >&6; }
+
+  HOST_CPU_C_ABI_32BIT="$gl_cv_host_cpu_c_abi_32bit"
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ELF binary format" >&5
+printf %s "checking for ELF binary format... " >&6; }
+if test ${gl_cv_elf+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef __ELF__
+        Extensible Linking Format
+        #endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Extensible Linking Format" >/dev/null 2>&1
+then :
+  gl_cv_elf=yes
+else $as_nop
+  gl_cv_elf=no
+fi
+rm -rf conftest*
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_elf" >&5
+printf "%s\n" "$gl_cv_elf" >&6; }
+  if test $gl_cv_elf = yes; then
+    # Extract the ELF class of a file (5th byte) in decimal.
+    # Cf. https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#File_header
+    if od -A x < /dev/null >/dev/null 2>/dev/null; then
+      # Use POSIX od.
+      func_elfclass ()
+      {
+        od -A n -t d1 -j 4 -N 1
+      }
+    else
+      # Use BSD hexdump.
+      func_elfclass ()
+      {
+        dd bs=1 count=1 skip=4 2>/dev/null | hexdump -e '1/1 "%3d "'
+        echo
+      }
+    fi
+    # Use 'expr', not 'test', to compare the values of func_elfclass, because on
+    # Solaris 11 OpenIndiana and Solaris 11 OmniOS, the result is 001 or 002,
+    # not 1 or 2.
+    case $HOST_CPU_C_ABI_32BIT in
+      yes)
+        # 32-bit ABI.
+        acl_is_expected_elfclass ()
+        {
+          expr "`func_elfclass | sed -e 's/[ 	]//g'`" = 1 > /dev/null
+        }
+        ;;
+      no)
+        # 64-bit ABI.
+        acl_is_expected_elfclass ()
+        {
+          expr "`func_elfclass | sed -e 's/[ 	]//g'`" = 2 > /dev/null
+        }
+        ;;
+      *)
+        # Unknown.
+        acl_is_expected_elfclass ()
+        {
+          :
+        }
+        ;;
+    esac
+  else
+    acl_is_expected_elfclass ()
+    {
+      :
+    }
+  fi
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for the common suffixes of directories in the library search path" >&5
+printf %s "checking for the common suffixes of directories in the library search path... " >&6; }
+if test ${acl_cv_libdirstems+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+            acl_libdirstem=lib
+     acl_libdirstem2=
+     acl_libdirstem3=
+     case "$host_os" in
+       solaris*)
+                                                      if test $HOST_CPU_C_ABI_32BIT = no; then
+           acl_libdirstem2=lib/64
+           case "$host_cpu" in
+             sparc*)        acl_libdirstem3=lib/sparcv9 ;;
+             i*86 | x86_64) acl_libdirstem3=lib/amd64 ;;
+           esac
+         fi
+         ;;
+       *)
+                                                                                 searchpath=`(LC_ALL=C $CC $CPPFLAGS $CFLAGS -print-search-dirs) 2>/dev/null \
+                     | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`
+         if test $HOST_CPU_C_ABI_32BIT != no; then
+           # 32-bit or unknown ABI.
+           if test -d /usr/lib32; then
+             acl_libdirstem2=lib32
+           fi
+         fi
+         if test $HOST_CPU_C_ABI_32BIT != yes; then
+           # 64-bit or unknown ABI.
+           if test -d /usr/lib64; then
+             acl_libdirstem3=lib64
+           fi
+         fi
+         if test -n "$searchpath"; then
+           acl_save_IFS="${IFS= 	}"; IFS=":"
+           for searchdir in $searchpath; do
+             if test -d "$searchdir"; then
+               case "$searchdir" in
+                 */lib32/ | */lib32 ) acl_libdirstem2=lib32 ;;
+                 */lib64/ | */lib64 ) acl_libdirstem3=lib64 ;;
+                 */../ | */.. )
+                   # Better ignore directories of this form. They are misleading.
+                   ;;
+                 *) searchdir=`cd "$searchdir" && pwd`
+                    case "$searchdir" in
+                      */lib32 ) acl_libdirstem2=lib32 ;;
+                      */lib64 ) acl_libdirstem3=lib64 ;;
+                    esac ;;
+               esac
+             fi
+           done
+           IFS="$acl_save_IFS"
+           if test $HOST_CPU_C_ABI_32BIT = yes; then
+             # 32-bit ABI.
+             acl_libdirstem3=
+           fi
+           if test $HOST_CPU_C_ABI_32BIT = no; then
+             # 64-bit ABI.
+             acl_libdirstem2=
+           fi
+         fi
+         ;;
+     esac
+     test -n "$acl_libdirstem2" || acl_libdirstem2="$acl_libdirstem"
+     test -n "$acl_libdirstem3" || acl_libdirstem3="$acl_libdirstem"
+     acl_cv_libdirstems="$acl_libdirstem,$acl_libdirstem2,$acl_libdirstem3"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $acl_cv_libdirstems" >&5
+printf "%s\n" "$acl_cv_libdirstems" >&6; }
+      acl_libdirstem=`echo "$acl_cv_libdirstems" | sed -e 's/,.*//'`
+  acl_libdirstem2=`echo "$acl_cv_libdirstems" | sed -e 's/^[^,]*,//' -e 's/,.*//'`
+  acl_libdirstem3=`echo "$acl_cv_libdirstems" | sed -e 's/^[^,]*,[^,]*,//' -e 's/,.*//'`
+
+
+
+
+
+
+
+
+
+
+
+    use_additional=yes
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+
+    eval additional_includedir=\"$includedir\"
+    eval additional_libdir=\"$libdir\"
+    eval additional_libdir2=\"$exec_prefix/$acl_libdirstem2\"
+    eval additional_libdir3=\"$exec_prefix/$acl_libdirstem3\"
+
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+
+# Check whether --with-libiconv-prefix was given.
+if test ${with_libiconv_prefix+y}
+then :
+  withval=$with_libiconv_prefix;
+    if test "X$withval" = "Xno"; then
+      use_additional=no
+    else
+      if test "X$withval" = "X"; then
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+
+          eval additional_includedir=\"$includedir\"
+          eval additional_libdir=\"$libdir\"
+          eval additional_libdir2=\"$exec_prefix/$acl_libdirstem2\"
+          eval additional_libdir3=\"$exec_prefix/$acl_libdirstem3\"
+
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+      else
+        additional_includedir="$withval/include"
+        additional_libdir="$withval/$acl_libdirstem"
+        additional_libdir2="$withval/$acl_libdirstem2"
+        additional_libdir3="$withval/$acl_libdirstem3"
+      fi
+    fi
+
+fi
+
+  if test "X$additional_libdir2" = "X$additional_libdir"; then
+    additional_libdir2=
+  fi
+  if test "X$additional_libdir3" = "X$additional_libdir"; then
+    additional_libdir3=
+  fi
+      LIBICONV=
+  LTLIBICONV=
+  INCICONV=
+  LIBICONV_PREFIX=
+      HAVE_LIBICONV=
+  rpathdirs=
+  ltrpathdirs=
+  names_already_handled=
+  names_next_round='iconv '
+  while test -n "$names_next_round"; do
+    names_this_round="$names_next_round"
+    names_next_round=
+    for name in $names_this_round; do
+      already_handled=
+      for n in $names_already_handled; do
+        if test "$n" = "$name"; then
+          already_handled=yes
+          break
+        fi
+      done
+      if test -z "$already_handled"; then
+        names_already_handled="$names_already_handled $name"
+                        uppername=`echo "$name" | sed -e 'y|abcdefghijklmnopqrstuvwxyz./+-|ABCDEFGHIJKLMNOPQRSTUVWXYZ____|'`
+        eval value=\"\$HAVE_LIB$uppername\"
+        if test -n "$value"; then
+          if test "$value" = yes; then
+            eval value=\"\$LIB$uppername\"
+            test -z "$value" || LIBICONV="${LIBICONV}${LIBICONV:+ }$value"
+            eval value=\"\$LTLIB$uppername\"
+            test -z "$value" || LTLIBICONV="${LTLIBICONV}${LTLIBICONV:+ }$value"
+          else
+                                    :
+          fi
+        else
+                              found_dir=
+          found_la=
+          found_so=
+          found_a=
+          eval libname=\"$acl_libname_spec\"    # typically: libname=lib$name
+          if test -n "$acl_shlibext"; then
+            shrext=".$acl_shlibext"             # typically: shrext=.so
+          else
+            shrext=
+          fi
+          if test $use_additional = yes; then
+            for additional_libdir_variable in additional_libdir additional_libdir2 additional_libdir3; do
+              if test "X$found_dir" = "X"; then
+                eval dir=\$$additional_libdir_variable
+                if test -n "$dir"; then
+                                                      if test -n "$acl_shlibext"; then
+                    if test -f "$dir/$libname$shrext" && acl_is_expected_elfclass < "$dir/$libname$shrext"; then
+                      found_dir="$dir"
+                      found_so="$dir/$libname$shrext"
+                    else
+                      if test "$acl_library_names_spec" = '$libname$shrext$versuffix'; then
+                        ver=`(cd "$dir" && \
+                              for f in "$libname$shrext".*; do echo "$f"; done \
+                              | sed -e "s,^$libname$shrext\\\\.,," \
+                              | sort -t '.' -n -r -k1,1 -k2,2 -k3,3 -k4,4 -k5,5 \
+                              | sed 1q ) 2>/dev/null`
+                        if test -n "$ver" && test -f "$dir/$libname$shrext.$ver" && acl_is_expected_elfclass < "$dir/$libname$shrext.$ver"; then
+                          found_dir="$dir"
+                          found_so="$dir/$libname$shrext.$ver"
+                        fi
+                      else
+                        eval library_names=\"$acl_library_names_spec\"
+                        for f in $library_names; do
+                          if test -f "$dir/$f" && acl_is_expected_elfclass < "$dir/$f"; then
+                            found_dir="$dir"
+                            found_so="$dir/$f"
+                            break
+                          fi
+                        done
+                      fi
+                    fi
+                  fi
+                                    if test "X$found_dir" = "X"; then
+                    if test -f "$dir/$libname.$acl_libext" && ${AR-ar} -p "$dir/$libname.$acl_libext" | acl_is_expected_elfclass; then
+                      found_dir="$dir"
+                      found_a="$dir/$libname.$acl_libext"
+                    fi
+                  fi
+                  if test "X$found_dir" != "X"; then
+                    if test -f "$dir/$libname.la"; then
+                      found_la="$dir/$libname.la"
+                    fi
+                  fi
+                fi
+              fi
+            done
+          fi
+          if test "X$found_dir" = "X"; then
+            for x in $LDFLAGS $LTLIBICONV; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+              case "$x" in
+                -L*)
+                  dir=`echo "X$x" | sed -e 's/^X-L//'`
+                                    if test -n "$acl_shlibext"; then
+                    if test -f "$dir/$libname$shrext" && acl_is_expected_elfclass < "$dir/$libname$shrext"; then
+                      found_dir="$dir"
+                      found_so="$dir/$libname$shrext"
+                    else
+                      if test "$acl_library_names_spec" = '$libname$shrext$versuffix'; then
+                        ver=`(cd "$dir" && \
+                              for f in "$libname$shrext".*; do echo "$f"; done \
+                              | sed -e "s,^$libname$shrext\\\\.,," \
+                              | sort -t '.' -n -r -k1,1 -k2,2 -k3,3 -k4,4 -k5,5 \
+                              | sed 1q ) 2>/dev/null`
+                        if test -n "$ver" && test -f "$dir/$libname$shrext.$ver" && acl_is_expected_elfclass < "$dir/$libname$shrext.$ver"; then
+                          found_dir="$dir"
+                          found_so="$dir/$libname$shrext.$ver"
+                        fi
+                      else
+                        eval library_names=\"$acl_library_names_spec\"
+                        for f in $library_names; do
+                          if test -f "$dir/$f" && acl_is_expected_elfclass < "$dir/$f"; then
+                            found_dir="$dir"
+                            found_so="$dir/$f"
+                            break
+                          fi
+                        done
+                      fi
+                    fi
+                  fi
+                                    if test "X$found_dir" = "X"; then
+                    if test -f "$dir/$libname.$acl_libext" && ${AR-ar} -p "$dir/$libname.$acl_libext" | acl_is_expected_elfclass; then
+                      found_dir="$dir"
+                      found_a="$dir/$libname.$acl_libext"
+                    fi
+                  fi
+                  if test "X$found_dir" != "X"; then
+                    if test -f "$dir/$libname.la"; then
+                      found_la="$dir/$libname.la"
+                    fi
+                  fi
+                  ;;
+              esac
+              if test "X$found_dir" != "X"; then
+                break
+              fi
+            done
+          fi
+          if test "X$found_dir" != "X"; then
+                        LTLIBICONV="${LTLIBICONV}${LTLIBICONV:+ }-L$found_dir -l$name"
+            if test "X$found_so" != "X"; then
+                                                        if test "$enable_rpath" = no \
+                 || test "X$found_dir" = "X/usr/$acl_libdirstem" \
+                 || test "X$found_dir" = "X/usr/$acl_libdirstem2" \
+                 || test "X$found_dir" = "X/usr/$acl_libdirstem3"; then
+                                LIBICONV="${LIBICONV}${LIBICONV:+ }$found_so"
+              else
+                                                                                haveit=
+                for x in $ltrpathdirs; do
+                  if test "X$x" = "X$found_dir"; then
+                    haveit=yes
+                    break
+                  fi
+                done
+                if test -z "$haveit"; then
+                  ltrpathdirs="$ltrpathdirs $found_dir"
+                fi
+                                if test "$acl_hardcode_direct" = yes; then
+                                                      LIBICONV="${LIBICONV}${LIBICONV:+ }$found_so"
+                else
+                  if test -n "$acl_hardcode_libdir_flag_spec" && test "$acl_hardcode_minus_L" = no; then
+                                                            LIBICONV="${LIBICONV}${LIBICONV:+ }$found_so"
+                                                            haveit=
+                    for x in $rpathdirs; do
+                      if test "X$x" = "X$found_dir"; then
+                        haveit=yes
+                        break
+                      fi
+                    done
+                    if test -z "$haveit"; then
+                      rpathdirs="$rpathdirs $found_dir"
+                    fi
+                  else
+                                                                                haveit=
+                    for x in $LDFLAGS $LIBICONV; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+                      if test "X$x" = "X-L$found_dir"; then
+                        haveit=yes
+                        break
+                      fi
+                    done
+                    if test -z "$haveit"; then
+                      LIBICONV="${LIBICONV}${LIBICONV:+ }-L$found_dir"
+                    fi
+                    if test "$acl_hardcode_minus_L" != no; then
+                                                                                        LIBICONV="${LIBICONV}${LIBICONV:+ }$found_so"
+                    else
+                                                                                                                                                                                LIBICONV="${LIBICONV}${LIBICONV:+ }-l$name"
+                    fi
+                  fi
+                fi
+              fi
+            else
+              if test "X$found_a" != "X"; then
+                                LIBICONV="${LIBICONV}${LIBICONV:+ }$found_a"
+              else
+                                                LIBICONV="${LIBICONV}${LIBICONV:+ }-L$found_dir -l$name"
+              fi
+            fi
+                        additional_includedir=
+            case "$found_dir" in
+              */$acl_libdirstem | */$acl_libdirstem/)
+                basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem/"'*$,,'`
+                if test "$name" = 'iconv'; then
+                  LIBICONV_PREFIX="$basedir"
+                fi
+                additional_includedir="$basedir/include"
+                ;;
+              */$acl_libdirstem2 | */$acl_libdirstem2/)
+                basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem2/"'*$,,'`
+                if test "$name" = 'iconv'; then
+                  LIBICONV_PREFIX="$basedir"
+                fi
+                additional_includedir="$basedir/include"
+                ;;
+              */$acl_libdirstem3 | */$acl_libdirstem3/)
+                basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem3/"'*$,,'`
+                if test "$name" = 'iconv'; then
+                  LIBICONV_PREFIX="$basedir"
+                fi
+                additional_includedir="$basedir/include"
+                ;;
+            esac
+            if test "X$additional_includedir" != "X"; then
+                                                                                                                if test "X$additional_includedir" != "X/usr/include"; then
+                haveit=
+                if test "X$additional_includedir" = "X/usr/local/include"; then
+                  if test -n "$GCC"; then
+                    case $host_os in
+                      linux* | gnu* | k*bsd*-gnu) haveit=yes;;
+                    esac
+                  fi
+                fi
+                if test -z "$haveit"; then
+                  for x in $CPPFLAGS $INCICONV; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+                    if test "X$x" = "X-I$additional_includedir"; then
+                      haveit=yes
+                      break
+                    fi
+                  done
+                  if test -z "$haveit"; then
+                    if test -d "$additional_includedir"; then
+                                            INCICONV="${INCICONV}${INCICONV:+ }-I$additional_includedir"
+                    fi
+                  fi
+                fi
+              fi
+            fi
+                        if test -n "$found_la"; then
+                                                        save_libdir="$libdir"
+              case "$found_la" in
+                */* | *\\*) . "$found_la" ;;
+                *) . "./$found_la" ;;
+              esac
+              libdir="$save_libdir"
+                            for dep in $dependency_libs; do
+                case "$dep" in
+                  -L*)
+                    dependency_libdir=`echo "X$dep" | sed -e 's/^X-L//'`
+                                                                                                                                                                if test "X$dependency_libdir" != "X/usr/$acl_libdirstem" \
+                       && test "X$dependency_libdir" != "X/usr/$acl_libdirstem2" \
+                       && test "X$dependency_libdir" != "X/usr/$acl_libdirstem3"; then
+                      haveit=
+                      if test "X$dependency_libdir" = "X/usr/local/$acl_libdirstem" \
+                         || test "X$dependency_libdir" = "X/usr/local/$acl_libdirstem2" \
+                         || test "X$dependency_libdir" = "X/usr/local/$acl_libdirstem3"; then
+                        if test -n "$GCC"; then
+                          case $host_os in
+                            linux* | gnu* | k*bsd*-gnu) haveit=yes;;
+                          esac
+                        fi
+                      fi
+                      if test -z "$haveit"; then
+                        haveit=
+                        for x in $LDFLAGS $LIBICONV; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+                          if test "X$x" = "X-L$dependency_libdir"; then
+                            haveit=yes
+                            break
+                          fi
+                        done
+                        if test -z "$haveit"; then
+                          if test -d "$dependency_libdir"; then
+                                                        LIBICONV="${LIBICONV}${LIBICONV:+ }-L$dependency_libdir"
+                          fi
+                        fi
+                        haveit=
+                        for x in $LDFLAGS $LTLIBICONV; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+                          if test "X$x" = "X-L$dependency_libdir"; then
+                            haveit=yes
+                            break
+                          fi
+                        done
+                        if test -z "$haveit"; then
+                          if test -d "$dependency_libdir"; then
+                                                        LTLIBICONV="${LTLIBICONV}${LTLIBICONV:+ }-L$dependency_libdir"
+                          fi
+                        fi
+                      fi
+                    fi
+                    ;;
+                  -R*)
+                    dir=`echo "X$dep" | sed -e 's/^X-R//'`
+                    if test "$enable_rpath" != no; then
+                                                                  haveit=
+                      for x in $rpathdirs; do
+                        if test "X$x" = "X$dir"; then
+                          haveit=yes
+                          break
+                        fi
+                      done
+                      if test -z "$haveit"; then
+                        rpathdirs="$rpathdirs $dir"
+                      fi
+                                                                  haveit=
+                      for x in $ltrpathdirs; do
+                        if test "X$x" = "X$dir"; then
+                          haveit=yes
+                          break
+                        fi
+                      done
+                      if test -z "$haveit"; then
+                        ltrpathdirs="$ltrpathdirs $dir"
+                      fi
+                    fi
+                    ;;
+                  -l*)
+                                                                                                                                                                dep=`echo "X$dep" | sed -e 's/^X-l//'`
+                    if test "X$dep" != Xc \
+                       || case $host_os in
+                            linux* | gnu* | k*bsd*-gnu) false ;;
+                            *)                          true ;;
+                          esac; then
+                      names_next_round="$names_next_round $dep"
+                    fi
+                    ;;
+                  *.la)
+                                                                                names_next_round="$names_next_round "`echo "X$dep" | sed -e 's,^X.*/,,' -e 's,^lib,,' -e 's,\.la$,,'`
+                    ;;
+                  *)
+                                        LIBICONV="${LIBICONV}${LIBICONV:+ }$dep"
+                    LTLIBICONV="${LTLIBICONV}${LTLIBICONV:+ }$dep"
+                    ;;
+                esac
+              done
+            fi
+          else
+                                                            LIBICONV="${LIBICONV}${LIBICONV:+ }-l$name"
+            LTLIBICONV="${LTLIBICONV}${LTLIBICONV:+ }-l$name"
+          fi
+        fi
+      fi
+    done
+  done
+  if test "X$rpathdirs" != "X"; then
+    if test -n "$acl_hardcode_libdir_separator"; then
+                        alldirs=
+      for found_dir in $rpathdirs; do
+        alldirs="${alldirs}${alldirs:+$acl_hardcode_libdir_separator}$found_dir"
+      done
+            acl_save_libdir="$libdir"
+      libdir="$alldirs"
+      eval flag=\"$acl_hardcode_libdir_flag_spec\"
+      libdir="$acl_save_libdir"
+      LIBICONV="${LIBICONV}${LIBICONV:+ }$flag"
+    else
+            for found_dir in $rpathdirs; do
+        acl_save_libdir="$libdir"
+        libdir="$found_dir"
+        eval flag=\"$acl_hardcode_libdir_flag_spec\"
+        libdir="$acl_save_libdir"
+        LIBICONV="${LIBICONV}${LIBICONV:+ }$flag"
+      done
+    fi
+  fi
+  if test "X$ltrpathdirs" != "X"; then
+            for found_dir in $ltrpathdirs; do
+      LTLIBICONV="${LTLIBICONV}${LTLIBICONV:+ }-R$found_dir"
+    done
+  fi
+
+
+
+
+
+
+
+
+    ICONV_CONST=;
+  REPLACE_ICONV=0;
+  REPLACE_ICONV_OPEN=0;
+  REPLACE_ICONV_UTF=0;
+  ICONV_H='';
+  if false; then
+              ICONV_H='iconv.h'
+     fi
+
+   if test -n "$ICONV_H"; then
+  GL_GENERATE_ICONV_H_TRUE=
+  GL_GENERATE_ICONV_H_FALSE='#'
+else
+  GL_GENERATE_ICONV_H_TRUE='#'
+  GL_GENERATE_ICONV_H_FALSE=
+fi
+
+
+
+
+
+
+
+          am_save_CPPFLAGS="$CPPFLAGS"
+
+  for element in $INCICONV; do
+    haveit=
+    for x in $CPPFLAGS; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+      if test "X$x" = "X$element"; then
+        haveit=yes
+        break
+      fi
+    done
+    if test -z "$haveit"; then
+      CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }$element"
+    fi
+  done
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for iconv" >&5
+printf %s "checking for iconv... " >&6; }
+if test ${am_cv_func_iconv+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    am_cv_func_iconv="no, consider installing GNU libiconv"
+    am_cv_lib_iconv=no
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdlib.h>
+#include <iconv.h>
+
+int
+main (void)
+{
+iconv_t cd = iconv_open("","");
+           iconv(cd,NULL,NULL,NULL,NULL);
+           iconv_close(cd);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  am_cv_func_iconv=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+    if test "$am_cv_func_iconv" != yes; then
+      am_save_LIBS="$LIBS"
+      LIBS="$LIBS $LIBICONV"
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdlib.h>
+#include <iconv.h>
+
+int
+main (void)
+{
+iconv_t cd = iconv_open("","");
+             iconv(cd,NULL,NULL,NULL,NULL);
+             iconv_close(cd);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  am_cv_lib_iconv=yes
+        am_cv_func_iconv=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+      LIBS="$am_save_LIBS"
+    fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_func_iconv" >&5
+printf "%s\n" "$am_cv_func_iconv" >&6; }
+  if test "$am_cv_func_iconv" = yes; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working iconv" >&5
+printf %s "checking for working iconv... " >&6; }
+if test ${am_cv_func_iconv_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  am_save_LIBS="$LIBS"
+      if test $am_cv_lib_iconv = yes; then
+        LIBS="$LIBS $LIBICONV"
+      fi
+      am_cv_func_iconv_works=no
+      for ac_iconv_const in '' 'const'; do
+        if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+             aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
+             *)            am_cv_func_iconv_works="guessing yes" ;;
+           esac
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <iconv.h>
+#include <string.h>
+
+#ifndef ICONV_CONST
+# define ICONV_CONST $ac_iconv_const
+#endif
+
+int
+main (void)
+{
+int result = 0;
+  /* Test against AIX 5.1...7.2 bug: Failures are not distinguishable from
+     successful returns.  This is even documented in
+     <https://www.ibm.com/support/knowledgecenter/ssw_aix_72/i_bostechref/iconv.html> */
+  {
+    iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
+    if (cd_utf8_to_88591 != (iconv_t)(-1))
+      {
+        static ICONV_CONST char input[] = "\342\202\254"; /* EURO SIGN */
+        char buf[10];
+        ICONV_CONST char *inptr = input;
+        size_t inbytesleft = strlen (input);
+        char *outptr = buf;
+        size_t outbytesleft = sizeof (buf);
+        size_t res = iconv (cd_utf8_to_88591,
+                            &inptr, &inbytesleft,
+                            &outptr, &outbytesleft);
+        if (res == 0)
+          result |= 1;
+        iconv_close (cd_utf8_to_88591);
+      }
+  }
+  /* Test against Solaris 10 bug: Failures are not distinguishable from
+     successful returns.  */
+  {
+    iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646");
+    if (cd_ascii_to_88591 != (iconv_t)(-1))
+      {
+        static ICONV_CONST char input[] = "\263";
+        char buf[10];
+        ICONV_CONST char *inptr = input;
+        size_t inbytesleft = strlen (input);
+        char *outptr = buf;
+        size_t outbytesleft = sizeof (buf);
+        size_t res = iconv (cd_ascii_to_88591,
+                            &inptr, &inbytesleft,
+                            &outptr, &outbytesleft);
+        if (res == 0)
+          result |= 2;
+        iconv_close (cd_ascii_to_88591);
+      }
+  }
+  /* Test against AIX 6.1..7.1 bug: Buffer overrun.  */
+  {
+    iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1");
+    if (cd_88591_to_utf8 != (iconv_t)(-1))
+      {
+        static ICONV_CONST char input[] = "\304";
+        static char buf[2] = { (char)0xDE, (char)0xAD };
+        ICONV_CONST char *inptr = input;
+        size_t inbytesleft = 1;
+        char *outptr = buf;
+        size_t outbytesleft = 1;
+        size_t res = iconv (cd_88591_to_utf8,
+                            &inptr, &inbytesleft,
+                            &outptr, &outbytesleft);
+        if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD)
+          result |= 4;
+        iconv_close (cd_88591_to_utf8);
+      }
+  }
+#if 0 /* This bug could be worked around by the caller.  */
+  /* Test against HP-UX 11.11 bug: Positive return value instead of 0.  */
+  {
+    iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
+    if (cd_88591_to_utf8 != (iconv_t)(-1))
+      {
+        static ICONV_CONST char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
+        char buf[50];
+        ICONV_CONST char *inptr = input;
+        size_t inbytesleft = strlen (input);
+        char *outptr = buf;
+        size_t outbytesleft = sizeof (buf);
+        size_t res = iconv (cd_88591_to_utf8,
+                            &inptr, &inbytesleft,
+                            &outptr, &outbytesleft);
+        if ((int)res > 0)
+          result |= 8;
+        iconv_close (cd_88591_to_utf8);
+      }
+  }
+#endif
+  /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
+     provided.  */
+  {
+    /* Try standardized names.  */
+    iconv_t cd1 = iconv_open ("UTF-8", "EUC-JP");
+    /* Try IRIX, OSF/1 names.  */
+    iconv_t cd2 = iconv_open ("UTF-8", "eucJP");
+    /* Try AIX names.  */
+    iconv_t cd3 = iconv_open ("UTF-8", "IBM-eucJP");
+    /* Try HP-UX names.  */
+    iconv_t cd4 = iconv_open ("utf8", "eucJP");
+    if (cd1 == (iconv_t)(-1) && cd2 == (iconv_t)(-1)
+        && cd3 == (iconv_t)(-1) && cd4 == (iconv_t)(-1))
+      result |= 16;
+    if (cd1 != (iconv_t)(-1))
+      iconv_close (cd1);
+    if (cd2 != (iconv_t)(-1))
+      iconv_close (cd2);
+    if (cd3 != (iconv_t)(-1))
+      iconv_close (cd3);
+    if (cd4 != (iconv_t)(-1))
+      iconv_close (cd4);
+  }
+  return result;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  am_cv_func_iconv_works=yes
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+        test "$am_cv_func_iconv_works" = no || break
+      done
+      LIBS="$am_save_LIBS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_func_iconv_works" >&5
+printf "%s\n" "$am_cv_func_iconv_works" >&6; }
+    case "$am_cv_func_iconv_works" in
+      *no) am_func_iconv=no am_cv_lib_iconv=no ;;
+      *)   am_func_iconv=yes ;;
+    esac
+  else
+    am_func_iconv=no am_cv_lib_iconv=no
+  fi
+  if test "$am_func_iconv" = yes; then
+
+printf "%s\n" "#define HAVE_ICONV 1" >>confdefs.h
+
+  fi
+  if test "$am_cv_lib_iconv" = yes; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to link with libiconv" >&5
+printf %s "checking how to link with libiconv... " >&6; }
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LIBICONV" >&5
+printf "%s\n" "$LIBICONV" >&6; }
+  else
+            CPPFLAGS="$am_save_CPPFLAGS"
+    LIBICONV=
+    LTLIBICONV=
+  fi
+
+
+
+  if test "$am_cv_func_iconv" = yes; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether iconv is compatible with its POSIX signature" >&5
+printf %s "checking whether iconv is compatible with its POSIX signature... " >&6; }
+if test ${gl_cv_iconv_nonconst+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdlib.h>
+#include <iconv.h>
+extern
+#ifdef __cplusplus
+"C"
+#endif
+size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_iconv_nonconst=yes
+else $as_nop
+  gl_cv_iconv_nonconst=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_iconv_nonconst" >&5
+printf "%s\n" "$gl_cv_iconv_nonconst" >&6; }
+  else
+            gl_cv_iconv_nonconst=yes
+  fi
+  if test $gl_cv_iconv_nonconst = yes; then
+    iconv_arg1=""
+  else
+    iconv_arg1="const"
+  fi
+
+printf "%s\n" "#define ICONV_CONST $iconv_arg1" >>confdefs.h
+
+
+     if test $gl_cv_iconv_nonconst != yes; then
+       ICONV_CONST="const"
+     fi
+
+
+
+
+  GL_GNULIB_ICONV=0
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_iconv_h='<'iconv.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <iconv.h>" >&5
+printf %s "checking absolute name of <iconv.h>... " >&6; }
+if test ${gl_cv_next_iconv_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_iconv_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <iconv.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'iconv.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_iconv_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_iconv_h
+           gl_cv_next_iconv_h='"'$gl_header'"'
+          else
+               gl_cv_next_iconv_h='<'iconv.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_iconv_h" >&5
+printf "%s\n" "$gl_cv_next_iconv_h" >&6; }
+     fi
+     NEXT_ICONV_H=$gl_cv_next_iconv_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'iconv.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_iconv_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_ICONV_H=$gl_next_as_first_directive
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_limits_h='<'limits.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <limits.h>" >&5
+printf %s "checking absolute name of <limits.h>... " >&6; }
+if test ${gl_cv_next_limits_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_limits_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <limits.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'limits.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_limits_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_limits_h
+           gl_cv_next_limits_h='"'$gl_header'"'
+          else
+               gl_cv_next_limits_h='<'limits.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_limits_h" >&5
+printf "%s\n" "$gl_cv_next_limits_h" >&6; }
+     fi
+     NEXT_LIMITS_H=$gl_cv_next_limits_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'limits.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_limits_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_LIMITS_H=$gl_next_as_first_directive
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether limits.h has WORD_BIT, BOOL_WIDTH etc." >&5
+printf %s "checking whether limits.h has WORD_BIT, BOOL_WIDTH etc.... " >&6; }
+if test ${gl_cv_header_limits_width+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifndef __STDC_WANT_IEC_60559_BFP_EXT__
+             #define __STDC_WANT_IEC_60559_BFP_EXT__ 1
+            #endif
+            #include <limits.h>
+            long long llm = LLONG_MAX;
+            int wb = WORD_BIT;
+            int ullw = ULLONG_WIDTH;
+            int bw = BOOL_WIDTH;
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_limits_width=yes
+else $as_nop
+  gl_cv_header_limits_width=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_limits_width" >&5
+printf "%s\n" "$gl_cv_header_limits_width" >&6; }
+  if test "$gl_cv_header_limits_width" = yes; then
+    LIMITS_H=
+  else
+    LIMITS_H=limits.h
+  fi
+
+   if test -n "$LIMITS_H"; then
+  GL_GENERATE_LIMITS_H_TRUE=
+  GL_GENERATE_LIMITS_H_FALSE='#'
+else
+  GL_GENERATE_LIMITS_H_TRUE='#'
+  GL_GENERATE_LIMITS_H_FALSE=
+fi
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for wint_t" >&5
+printf %s "checking for wint_t... " >&6; }
+if test ${gt_cv_c_wint_t+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <wchar.h>
+            wint_t foo = (wchar_t)'\0';
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gt_cv_c_wint_t=yes
+else $as_nop
+  gt_cv_c_wint_t=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_c_wint_t" >&5
+printf "%s\n" "$gt_cv_c_wint_t" >&6; }
+  if test $gt_cv_c_wint_t = yes; then
+
+printf "%s\n" "#define HAVE_WINT_T 1" >>confdefs.h
+
+
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether wint_t is large enough" >&5
+printf %s "checking whether wint_t is large enough... " >&6; }
+if test ${gl_cv_type_wint_t_large_enough+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <wchar.h>
+              int verify[sizeof (wint_t) < sizeof (int) ? -1 : 1];
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_type_wint_t_large_enough=yes
+else $as_nop
+  gl_cv_type_wint_t_large_enough=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_type_wint_t_large_enough" >&5
+printf "%s\n" "$gl_cv_type_wint_t_large_enough" >&6; }
+    if test $gl_cv_type_wint_t_large_enough = no; then
+      GNULIBHEADERS_OVERRIDE_WINT_T=1
+    else
+      GNULIBHEADERS_OVERRIDE_WINT_T=0
+    fi
+  else
+    GNULIBHEADERS_OVERRIDE_WINT_T=0
+  fi
+
+
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the compiler produces multi-arch binaries" >&5
+printf %s "checking whether the compiler produces multi-arch binaries... " >&6; }
+if test ${gl_cv_c_multiarch+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_cv_c_multiarch=no
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifndef __APPLE_CC__
+            not a universal capable compiler
+           #endif
+           typedef int dummy;
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+
+                        arch=
+        prev=
+        for word in ${CC} ${CFLAGS} ${CPPFLAGS} ${LDFLAGS}; do
+          if test -n "$prev"; then
+            case $word in
+              i?86 | x86_64 | ppc | ppc64 | arm | arm64)
+                if test -z "$arch" || test "$arch" = "$word"; then
+                  arch="$word"
+                else
+                  gl_cv_c_multiarch=yes
+                fi
+                ;;
+            esac
+            prev=
+          else
+            if test "x$word" = "x-arch"; then
+              prev=arch
+            fi
+          fi
+        done
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_c_multiarch" >&5
+printf "%s\n" "$gl_cv_c_multiarch" >&6; }
+  if test $gl_cv_c_multiarch = yes; then
+    APPLE_UNIVERSAL_BUILD=1
+  else
+    APPLE_UNIVERSAL_BUILD=0
+  fi
+
+
+
+
+
+
+
+
+printf "%s\n" "#define HAVE_LONG_LONG_INT 1" >>confdefs.h
+
+
+printf "%s\n" "#define HAVE_UNSIGNED_LONG_LONG_INT 1" >>confdefs.h
+
+
+
+  if test $ac_cv_header_wchar_h = yes; then
+    HAVE_WCHAR_H=1
+  else
+    HAVE_WCHAR_H=0
+  fi
+
+
+
+  if test $ac_cv_header_inttypes_h = yes; then
+    HAVE_INTTYPES_H=1
+  else
+    HAVE_INTTYPES_H=0
+  fi
+
+
+
+  if test $ac_cv_header_sys_types_h = yes; then
+    HAVE_SYS_TYPES_H=1
+  else
+    HAVE_SYS_TYPES_H=0
+  fi
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_stdint_h='<'stdint.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <stdint.h>" >&5
+printf %s "checking absolute name of <stdint.h>... " >&6; }
+if test ${gl_cv_next_stdint_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_stdint_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdint.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'stdint.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_stdint_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_stdint_h
+           gl_cv_next_stdint_h='"'$gl_header'"'
+          else
+               gl_cv_next_stdint_h='<'stdint.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_stdint_h" >&5
+printf "%s\n" "$gl_cv_next_stdint_h" >&6; }
+     fi
+     NEXT_STDINT_H=$gl_cv_next_stdint_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'stdint.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_stdint_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_STDINT_H=$gl_next_as_first_directive
+
+
+
+
+  if test $ac_cv_header_stdint_h = yes; then
+    HAVE_STDINT_H=1
+  else
+    HAVE_STDINT_H=0
+  fi
+
+
+    if test $ac_cv_header_stdint_h = yes; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether stdint.h conforms to C99" >&5
+printf %s "checking whether stdint.h conforms to C99... " >&6; }
+if test ${gl_cv_header_working_stdint_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_cv_header_working_stdint_h=no
+       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+
+#define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
+#define __STDC_CONSTANT_MACROS 1
+#define __STDC_LIMIT_MACROS 1
+#include <stdint.h>
+/* Dragonfly defines WCHAR_MIN, WCHAR_MAX only in <wchar.h>.  */
+#if !(defined WCHAR_MIN && defined WCHAR_MAX)
+#error "WCHAR_MIN, WCHAR_MAX not defined in <stdint.h>"
+#endif
+
+
+  #include <stddef.h>
+  #include <signal.h>
+  #if HAVE_WCHAR_H
+  # include <wchar.h>
+  #endif
+
+
+#ifdef INT8_MAX
+int8_t a1 = INT8_MAX;
+int8_t a1min = INT8_MIN;
+#endif
+#ifdef INT16_MAX
+int16_t a2 = INT16_MAX;
+int16_t a2min = INT16_MIN;
+#endif
+#ifdef INT32_MAX
+int32_t a3 = INT32_MAX;
+int32_t a3min = INT32_MIN;
+#endif
+#ifdef INT64_MAX
+int64_t a4 = INT64_MAX;
+int64_t a4min = INT64_MIN;
+#endif
+#ifdef UINT8_MAX
+uint8_t b1 = UINT8_MAX;
+#else
+typedef int b1[(unsigned char) -1 != 255 ? 1 : -1];
+#endif
+#ifdef UINT16_MAX
+uint16_t b2 = UINT16_MAX;
+#endif
+#ifdef UINT32_MAX
+uint32_t b3 = UINT32_MAX;
+#endif
+#ifdef UINT64_MAX
+uint64_t b4 = UINT64_MAX;
+#endif
+int_least8_t c1 = INT8_C (0x7f);
+int_least8_t c1max = INT_LEAST8_MAX;
+int_least8_t c1min = INT_LEAST8_MIN;
+int_least16_t c2 = INT16_C (0x7fff);
+int_least16_t c2max = INT_LEAST16_MAX;
+int_least16_t c2min = INT_LEAST16_MIN;
+int_least32_t c3 = INT32_C (0x7fffffff);
+int_least32_t c3max = INT_LEAST32_MAX;
+int_least32_t c3min = INT_LEAST32_MIN;
+int_least64_t c4 = INT64_C (0x7fffffffffffffff);
+int_least64_t c4max = INT_LEAST64_MAX;
+int_least64_t c4min = INT_LEAST64_MIN;
+uint_least8_t d1 = UINT8_C (0xff);
+uint_least8_t d1max = UINT_LEAST8_MAX;
+uint_least16_t d2 = UINT16_C (0xffff);
+uint_least16_t d2max = UINT_LEAST16_MAX;
+uint_least32_t d3 = UINT32_C (0xffffffff);
+uint_least32_t d3max = UINT_LEAST32_MAX;
+uint_least64_t d4 = UINT64_C (0xffffffffffffffff);
+uint_least64_t d4max = UINT_LEAST64_MAX;
+int_fast8_t e1 = INT_FAST8_MAX;
+int_fast8_t e1min = INT_FAST8_MIN;
+int_fast16_t e2 = INT_FAST16_MAX;
+int_fast16_t e2min = INT_FAST16_MIN;
+int_fast32_t e3 = INT_FAST32_MAX;
+int_fast32_t e3min = INT_FAST32_MIN;
+int_fast64_t e4 = INT_FAST64_MAX;
+int_fast64_t e4min = INT_FAST64_MIN;
+uint_fast8_t f1 = UINT_FAST8_MAX;
+uint_fast16_t f2 = UINT_FAST16_MAX;
+uint_fast32_t f3 = UINT_FAST32_MAX;
+uint_fast64_t f4 = UINT_FAST64_MAX;
+#ifdef INTPTR_MAX
+intptr_t g = INTPTR_MAX;
+intptr_t gmin = INTPTR_MIN;
+#endif
+#ifdef UINTPTR_MAX
+uintptr_t h = UINTPTR_MAX;
+#endif
+intmax_t i = INTMAX_MAX;
+uintmax_t j = UINTMAX_MAX;
+
+/* Check that SIZE_MAX has the correct type, if possible.  */
+#if 201112 <= __STDC_VERSION__
+int k = _Generic (SIZE_MAX, size_t: 0);
+#elif (2 <= __GNUC__ || 4 <= __clang_major__ || defined __IBM__TYPEOF__ \
+       || (0x5110 <= __SUNPRO_C && !__STDC__))
+extern size_t k;
+extern __typeof__ (SIZE_MAX) k;
+#endif
+
+#include <limits.h> /* for CHAR_BIT */
+#define TYPE_MINIMUM(t) \
+  ((t) ((t) 0 < (t) -1 ? (t) 0 : ~ TYPE_MAXIMUM (t)))
+#define TYPE_MAXIMUM(t) \
+  ((t) ((t) 0 < (t) -1 \
+        ? (t) -1 \
+        : ((((t) 1 << (sizeof (t) * CHAR_BIT - 2)) - 1) * 2 + 1)))
+struct s {
+  int check_PTRDIFF:
+      PTRDIFF_MIN == TYPE_MINIMUM (ptrdiff_t)
+      && PTRDIFF_MAX == TYPE_MAXIMUM (ptrdiff_t)
+      ? 1 : -1;
+  /* Detect bug in FreeBSD 6.0/ia64 and FreeBSD 13.0/arm64.  */
+  int check_SIG_ATOMIC:
+      SIG_ATOMIC_MIN == TYPE_MINIMUM (sig_atomic_t)
+      && SIG_ATOMIC_MAX == TYPE_MAXIMUM (sig_atomic_t)
+      ? 1 : -1;
+  int check_SIZE: SIZE_MAX == TYPE_MAXIMUM (size_t) ? 1 : -1;
+  int check_WCHAR:
+      WCHAR_MIN == TYPE_MINIMUM (wchar_t)
+      && WCHAR_MAX == TYPE_MAXIMUM (wchar_t)
+      ? 1 : -1;
+  /* Detect bug in mingw.  */
+  int check_WINT:
+      WINT_MIN == TYPE_MINIMUM (wint_t)
+      && WINT_MAX == TYPE_MAXIMUM (wint_t)
+      ? 1 : -1;
+
+  /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others.  */
+  int check_UINT8_C:
+        (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1;
+  int check_UINT16_C:
+        (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1;
+
+  /* Detect bugs in OpenBSD 3.9 stdint.h.  */
+#ifdef UINT8_MAX
+  int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1;
+#endif
+#ifdef UINT16_MAX
+  int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1;
+#endif
+#ifdef UINT32_MAX
+  int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1;
+#endif
+#ifdef UINT64_MAX
+  int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1;
+#endif
+  int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1;
+  int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1;
+  int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1;
+  int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1;
+  int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1;
+  int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1;
+  int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1;
+  int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1;
+  int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1;
+  int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1;
+  int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1;
+};
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+                                                    if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_header_working_stdint_h="guessing yes" ;;
+                         # In general, assume it works.
+                 *)      gl_cv_header_working_stdint_h="guessing yes" ;;
+               esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+
+#define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
+#define __STDC_CONSTANT_MACROS 1
+#define __STDC_LIMIT_MACROS 1
+#include <stdint.h>
+
+
+  #include <stddef.h>
+  #include <signal.h>
+  #if HAVE_WCHAR_H
+  # include <wchar.h>
+  #endif
+
+
+#include <stdio.h>
+#include <string.h>
+#define MVAL(macro) MVAL1(macro)
+#define MVAL1(expression) #expression
+static const char *macro_values[] =
+  {
+#ifdef INT8_MAX
+    MVAL (INT8_MAX),
+#endif
+#ifdef INT16_MAX
+    MVAL (INT16_MAX),
+#endif
+#ifdef INT32_MAX
+    MVAL (INT32_MAX),
+#endif
+#ifdef INT64_MAX
+    MVAL (INT64_MAX),
+#endif
+#ifdef UINT8_MAX
+    MVAL (UINT8_MAX),
+#endif
+#ifdef UINT16_MAX
+    MVAL (UINT16_MAX),
+#endif
+#ifdef UINT32_MAX
+    MVAL (UINT32_MAX),
+#endif
+#ifdef UINT64_MAX
+    MVAL (UINT64_MAX),
+#endif
+    NULL
+  };
+
+int
+main (void)
+{
+
+  const char **mv;
+  for (mv = macro_values; *mv != NULL; mv++)
+    {
+      const char *value = *mv;
+      /* Test whether it looks like a cast expression.  */
+      if (strncmp (value, "((unsigned int)"/*)*/, 15) == 0
+          || strncmp (value, "((unsigned short)"/*)*/, 17) == 0
+          || strncmp (value, "((unsigned char)"/*)*/, 16) == 0
+          || strncmp (value, "((int)"/*)*/, 6) == 0
+          || strncmp (value, "((signed short)"/*)*/, 15) == 0
+          || strncmp (value, "((signed char)"/*)*/, 14) == 0)
+        return mv - macro_values + 1;
+    }
+  return 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_header_working_stdint_h=yes
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_working_stdint_h" >&5
+printf "%s\n" "$gl_cv_header_working_stdint_h" >&6; }
+  fi
+
+  HAVE_C99_STDINT_H=0
+  HAVE_SYS_BITYPES_H=0
+  HAVE_SYS_INTTYPES_H=0
+  STDINT_H=stdint.h
+  case "$gl_cv_header_working_stdint_h" in
+    *yes)
+      HAVE_C99_STDINT_H=1
+                        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether stdint.h works without ISO C predefines" >&5
+printf %s "checking whether stdint.h works without ISO C predefines... " >&6; }
+if test ${gl_cv_header_stdint_without_STDC_macros+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_cv_header_stdint_without_STDC_macros=no
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+
+#define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
+#include <stdint.h>
+
+
+  #include <stddef.h>
+  #include <signal.h>
+  #if HAVE_WCHAR_H
+  # include <wchar.h>
+  #endif
+
+
+intmax_t im = INTMAX_MAX;
+int32_t i32 = INT32_C (0x7fffffff);
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_stdint_without_STDC_macros=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_stdint_without_STDC_macros" >&5
+printf "%s\n" "$gl_cv_header_stdint_without_STDC_macros" >&6; }
+
+      if test $gl_cv_header_stdint_without_STDC_macros = no; then
+
+printf "%s\n" "#define __STDC_CONSTANT_MACROS 1" >>confdefs.h
+
+
+printf "%s\n" "#define __STDC_LIMIT_MACROS 1" >>confdefs.h
+
+      fi
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether stdint.h has UINTMAX_WIDTH etc." >&5
+printf %s "checking whether stdint.h has UINTMAX_WIDTH etc.... " >&6; }
+if test ${gl_cv_header_stdint_width+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_cv_header_stdint_width=no
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+              /* Work if build is not clean.  */
+              #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1
+              #ifndef __STDC_WANT_IEC_60559_BFP_EXT__
+               #define __STDC_WANT_IEC_60559_BFP_EXT__ 1
+              #endif
+              #include <stdint.h>
+
+  #include <stddef.h>
+  #include <signal.h>
+  #if HAVE_WCHAR_H
+  # include <wchar.h>
+  #endif
+
+              int iw = UINTMAX_WIDTH;
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_stdint_width=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_stdint_width" >&5
+printf "%s\n" "$gl_cv_header_stdint_width" >&6; }
+      if test "$gl_cv_header_stdint_width" = yes; then
+        STDINT_H=
+      fi
+      ;;
+    *)
+                  ac_fn_c_check_header_compile "$LINENO" "sys/inttypes.h" "ac_cv_header_sys_inttypes_h" "$ac_includes_default"
+if test "x$ac_cv_header_sys_inttypes_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYS_INTTYPES_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "sys/bitypes.h" "ac_cv_header_sys_bitypes_h" "$ac_includes_default"
+if test "x$ac_cv_header_sys_bitypes_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYS_BITYPES_H 1" >>confdefs.h
+
+fi
+
+      if test $ac_cv_header_sys_inttypes_h = yes; then
+        HAVE_SYS_INTTYPES_H=1
+      fi
+      if test $ac_cv_header_sys_bitypes_h = yes; then
+        HAVE_SYS_BITYPES_H=1
+      fi
+
+
+  if test $APPLE_UNIVERSAL_BUILD = 0; then
+
+
+  for gltype in ptrdiff_t size_t ; do
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for bit size of $gltype" >&5
+printf %s "checking for bit size of $gltype... " >&6; }
+if eval test \${gl_cv_bitsizeof_${gltype}+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if ac_fn_c_compute_int "$LINENO" "sizeof ($gltype) * CHAR_BIT" "result"        "
+  #include <stddef.h>
+  #include <signal.h>
+  #if HAVE_WCHAR_H
+  # include <wchar.h>
+  #endif
+
+#include <limits.h>"
+then :
+
+else $as_nop
+  result=unknown
+fi
+
+       eval gl_cv_bitsizeof_${gltype}=\$result
+
+fi
+eval ac_res=\$gl_cv_bitsizeof_${gltype}
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+    eval result=\$gl_cv_bitsizeof_${gltype}
+    if test $result = unknown; then
+                                                result=0
+    fi
+    GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
+    printf "%s\n" "#define BITSIZEOF_${GLTYPE} $result" >>confdefs.h
+
+    eval BITSIZEOF_${GLTYPE}=\$result
+  done
+
+
+  fi
+
+
+  for gltype in sig_atomic_t wchar_t wint_t ; do
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for bit size of $gltype" >&5
+printf %s "checking for bit size of $gltype... " >&6; }
+if eval test \${gl_cv_bitsizeof_${gltype}+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if ac_fn_c_compute_int "$LINENO" "sizeof ($gltype) * CHAR_BIT" "result"        "
+  #include <stddef.h>
+  #include <signal.h>
+  #if HAVE_WCHAR_H
+  # include <wchar.h>
+  #endif
+
+#include <limits.h>"
+then :
+
+else $as_nop
+  result=unknown
+fi
+
+       eval gl_cv_bitsizeof_${gltype}=\$result
+
+fi
+eval ac_res=\$gl_cv_bitsizeof_${gltype}
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+    eval result=\$gl_cv_bitsizeof_${gltype}
+    if test $result = unknown; then
+                                                result=0
+    fi
+    GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
+    printf "%s\n" "#define BITSIZEOF_${GLTYPE} $result" >>confdefs.h
+
+    eval BITSIZEOF_${GLTYPE}=\$result
+  done
+
+
+
+
+  for gltype in sig_atomic_t wchar_t wint_t ; do
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $gltype is signed" >&5
+printf %s "checking whether $gltype is signed... " >&6; }
+if eval test \${gl_cv_type_${gltype}_signed+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+  #include <stddef.h>
+  #include <signal.h>
+  #if HAVE_WCHAR_H
+  # include <wchar.h>
+  #endif
+
+            int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  result=yes
+else $as_nop
+  result=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+       eval gl_cv_type_${gltype}_signed=\$result
+
+fi
+eval ac_res=\$gl_cv_type_${gltype}_signed
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+    eval result=\$gl_cv_type_${gltype}_signed
+    GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
+    if test "$result" = yes; then
+      printf "%s\n" "#define HAVE_SIGNED_${GLTYPE} 1" >>confdefs.h
+
+      eval HAVE_SIGNED_${GLTYPE}=1
+    else
+      eval HAVE_SIGNED_${GLTYPE}=0
+    fi
+  done
+
+
+  gl_cv_type_ptrdiff_t_signed=yes
+  gl_cv_type_size_t_signed=no
+  if test $APPLE_UNIVERSAL_BUILD = 0; then
+
+
+  for gltype in ptrdiff_t size_t ; do
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $gltype integer literal suffix" >&5
+printf %s "checking for $gltype integer literal suffix... " >&6; }
+if eval test \${gl_cv_type_${gltype}_suffix+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  eval gl_cv_type_${gltype}_suffix=no
+       eval result=\$gl_cv_type_${gltype}_signed
+       if test "$result" = yes; then
+         glsufu=
+       else
+         glsufu=u
+       fi
+       for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do
+         case $glsuf in
+           '')  gltype1='int';;
+           l)   gltype1='long int';;
+           ll)  gltype1='long long int';;
+           i64) gltype1='__int64';;
+           u)   gltype1='unsigned int';;
+           ul)  gltype1='unsigned long int';;
+           ull) gltype1='unsigned long long int';;
+           ui64)gltype1='unsigned __int64';;
+         esac
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+  #include <stddef.h>
+  #include <signal.h>
+  #if HAVE_WCHAR_H
+  # include <wchar.h>
+  #endif
+
+              extern $gltype foo;
+              extern $gltype1 foo;
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  eval gl_cv_type_${gltype}_suffix=\$glsuf
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+         eval result=\$gl_cv_type_${gltype}_suffix
+         test "$result" != no && break
+       done
+fi
+eval ac_res=\$gl_cv_type_${gltype}_suffix
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+    GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
+    eval result=\$gl_cv_type_${gltype}_suffix
+    test "$result" = no && result=
+    eval ${GLTYPE}_SUFFIX=\$result
+    printf "%s\n" "#define ${GLTYPE}_SUFFIX $result" >>confdefs.h
+
+  done
+
+
+  fi
+
+
+  for gltype in sig_atomic_t wchar_t wint_t ; do
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $gltype integer literal suffix" >&5
+printf %s "checking for $gltype integer literal suffix... " >&6; }
+if eval test \${gl_cv_type_${gltype}_suffix+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  eval gl_cv_type_${gltype}_suffix=no
+       eval result=\$gl_cv_type_${gltype}_signed
+       if test "$result" = yes; then
+         glsufu=
+       else
+         glsufu=u
+       fi
+       for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do
+         case $glsuf in
+           '')  gltype1='int';;
+           l)   gltype1='long int';;
+           ll)  gltype1='long long int';;
+           i64) gltype1='__int64';;
+           u)   gltype1='unsigned int';;
+           ul)  gltype1='unsigned long int';;
+           ull) gltype1='unsigned long long int';;
+           ui64)gltype1='unsigned __int64';;
+         esac
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+  #include <stddef.h>
+  #include <signal.h>
+  #if HAVE_WCHAR_H
+  # include <wchar.h>
+  #endif
+
+              extern $gltype foo;
+              extern $gltype1 foo;
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  eval gl_cv_type_${gltype}_suffix=\$glsuf
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+         eval result=\$gl_cv_type_${gltype}_suffix
+         test "$result" != no && break
+       done
+fi
+eval ac_res=\$gl_cv_type_${gltype}_suffix
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+    GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
+    eval result=\$gl_cv_type_${gltype}_suffix
+    test "$result" = no && result=
+    eval ${GLTYPE}_SUFFIX=\$result
+    printf "%s\n" "#define ${GLTYPE}_SUFFIX $result" >>confdefs.h
+
+  done
+
+
+
+          if test $GNULIBHEADERS_OVERRIDE_WINT_T = 1; then
+    BITSIZEOF_WINT_T=32
+  fi
+
+      ;;
+  esac
+
+
+
+  LIMITS_H='limits.h'
+   if test -n "$LIMITS_H"; then
+  GL_GENERATE_LIMITS_H_TRUE=
+  GL_GENERATE_LIMITS_H_FALSE='#'
+else
+  GL_GENERATE_LIMITS_H_TRUE='#'
+  GL_GENERATE_LIMITS_H_FALSE=
+fi
+
+
+
+
+
+
+
+   if test -n "$STDINT_H"; then
+  GL_GENERATE_STDINT_H_TRUE=
+  GL_GENERATE_STDINT_H_FALSE='#'
+else
+  GL_GENERATE_STDINT_H_TRUE='#'
+  GL_GENERATE_STDINT_H_FALSE=
+fi
+
+
+
+    HAVE_DECL_IMAXABS=1;
+  HAVE_DECL_IMAXDIV=1;
+  HAVE_DECL_STRTOIMAX=1;
+  HAVE_DECL_STRTOUMAX=1;
+  HAVE_IMAXDIV_T=1;
+  REPLACE_STRTOIMAX=0;
+  REPLACE_STRTOUMAX=0;
+  INT32_MAX_LT_INTMAX_MAX=1;
+  INT64_MAX_EQ_LONG_MAX='defined _LP64';
+  PRIPTR_PREFIX=__PRIPTR_PREFIX;
+  UINT32_MAX_LT_UINTMAX_MAX=1;
+  UINT64_MAX_EQ_ULONG_MAX='defined _LP64';
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_inttypes_h='<'inttypes.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <inttypes.h>" >&5
+printf %s "checking absolute name of <inttypes.h>... " >&6; }
+if test ${gl_cv_next_inttypes_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_inttypes_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <inttypes.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'inttypes.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_inttypes_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_inttypes_h
+           gl_cv_next_inttypes_h='"'$gl_header'"'
+          else
+               gl_cv_next_inttypes_h='<'inttypes.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_inttypes_h" >&5
+printf "%s\n" "$gl_cv_next_inttypes_h" >&6; }
+     fi
+     NEXT_INTTYPES_H=$gl_cv_next_inttypes_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'inttypes.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_inttypes_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H=$gl_next_as_first_directive
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  PRIPTR_PREFIX=
+  if test -n "$STDINT_H"; then
+            cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+         #ifdef _WIN64
+         LLP64
+         #endif
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  PRIPTR_PREFIX='"l"'
+else $as_nop
+  PRIPTR_PREFIX='"ll"'
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+  else
+        for glpfx in '' l ll I64; do
+      case $glpfx in
+        '')  gltype1='int';;
+        l)   gltype1='long int';;
+        ll)  gltype1='long long int';;
+        I64) gltype1='__int64';;
+      esac
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdint.h>
+           extern intptr_t foo;
+           extern $gltype1 foo;
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  PRIPTR_PREFIX='"'$glpfx'"'
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+      test -n "$PRIPTR_PREFIX" && break
+    done
+  fi
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether INT32_MAX < INTMAX_MAX" >&5
+printf %s "checking whether INT32_MAX < INTMAX_MAX... " >&6; }
+if test ${gl_cv_test_INT32_MAX_LT_INTMAX_MAX+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+/* Work also in C++ mode.  */
+            #define __STDC_LIMIT_MACROS 1
+
+            /* Work if build is not clean.  */
+            #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H
+
+            #include <limits.h>
+            #if HAVE_STDINT_H
+             #include <stdint.h>
+            #endif
+
+            #if defined INT32_MAX && defined INTMAX_MAX
+             #define CONDITION (INT32_MAX < INTMAX_MAX)
+            #else
+             #define CONDITION (sizeof (int) < sizeof (long long int))
+            #endif
+            int test[CONDITION ? 1 : -1];
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_test_INT32_MAX_LT_INTMAX_MAX=yes
+else $as_nop
+  gl_cv_test_INT32_MAX_LT_INTMAX_MAX=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_test_INT32_MAX_LT_INTMAX_MAX" >&5
+printf "%s\n" "$gl_cv_test_INT32_MAX_LT_INTMAX_MAX" >&6; }
+  if test $gl_cv_test_INT32_MAX_LT_INTMAX_MAX = yes; then
+    INT32_MAX_LT_INTMAX_MAX=1;
+  else
+    INT32_MAX_LT_INTMAX_MAX=0;
+  fi
+
+
+  if test $APPLE_UNIVERSAL_BUILD = 0; then
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether INT64_MAX == LONG_MAX" >&5
+printf %s "checking whether INT64_MAX == LONG_MAX... " >&6; }
+if test ${gl_cv_test_INT64_MAX_EQ_LONG_MAX+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+/* Work also in C++ mode.  */
+            #define __STDC_LIMIT_MACROS 1
+
+            /* Work if build is not clean.  */
+            #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H
+
+            #include <limits.h>
+            #if HAVE_STDINT_H
+             #include <stdint.h>
+            #endif
+
+            #if defined INT64_MAX
+             #define CONDITION (INT64_MAX == LONG_MAX)
+            #else
+             #define CONDITION (sizeof (long long int) == sizeof (long int))
+            #endif
+            int test[CONDITION ? 1 : -1];
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_test_INT64_MAX_EQ_LONG_MAX=yes
+else $as_nop
+  gl_cv_test_INT64_MAX_EQ_LONG_MAX=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_test_INT64_MAX_EQ_LONG_MAX" >&5
+printf "%s\n" "$gl_cv_test_INT64_MAX_EQ_LONG_MAX" >&6; }
+  if test $gl_cv_test_INT64_MAX_EQ_LONG_MAX = yes; then
+    INT64_MAX_EQ_LONG_MAX=1;
+  else
+    INT64_MAX_EQ_LONG_MAX=0;
+  fi
+
+
+  else
+    INT64_MAX_EQ_LONG_MAX=-1
+  fi
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether UINT32_MAX < UINTMAX_MAX" >&5
+printf %s "checking whether UINT32_MAX < UINTMAX_MAX... " >&6; }
+if test ${gl_cv_test_UINT32_MAX_LT_UINTMAX_MAX+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+/* Work also in C++ mode.  */
+            #define __STDC_LIMIT_MACROS 1
+
+            /* Work if build is not clean.  */
+            #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H
+
+            #include <limits.h>
+            #if HAVE_STDINT_H
+             #include <stdint.h>
+            #endif
+
+            #if defined UINT32_MAX && defined UINTMAX_MAX
+             #define CONDITION (UINT32_MAX < UINTMAX_MAX)
+            #else
+             #define CONDITION (sizeof (unsigned int) < sizeof (unsigned long long int))
+            #endif
+            int test[CONDITION ? 1 : -1];
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_test_UINT32_MAX_LT_UINTMAX_MAX=yes
+else $as_nop
+  gl_cv_test_UINT32_MAX_LT_UINTMAX_MAX=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_test_UINT32_MAX_LT_UINTMAX_MAX" >&5
+printf "%s\n" "$gl_cv_test_UINT32_MAX_LT_UINTMAX_MAX" >&6; }
+  if test $gl_cv_test_UINT32_MAX_LT_UINTMAX_MAX = yes; then
+    UINT32_MAX_LT_UINTMAX_MAX=1;
+  else
+    UINT32_MAX_LT_UINTMAX_MAX=0;
+  fi
+
+
+  if test $APPLE_UNIVERSAL_BUILD = 0; then
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether UINT64_MAX == ULONG_MAX" >&5
+printf %s "checking whether UINT64_MAX == ULONG_MAX... " >&6; }
+if test ${gl_cv_test_UINT64_MAX_EQ_ULONG_MAX+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+/* Work also in C++ mode.  */
+            #define __STDC_LIMIT_MACROS 1
+
+            /* Work if build is not clean.  */
+            #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H
+
+            #include <limits.h>
+            #if HAVE_STDINT_H
+             #include <stdint.h>
+            #endif
+
+            #if defined UINT64_MAX
+             #define CONDITION (UINT64_MAX == ULONG_MAX)
+            #else
+             #define CONDITION (sizeof (unsigned long long int) == sizeof (unsigned long int))
+            #endif
+            int test[CONDITION ? 1 : -1];
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_test_UINT64_MAX_EQ_ULONG_MAX=yes
+else $as_nop
+  gl_cv_test_UINT64_MAX_EQ_ULONG_MAX=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_test_UINT64_MAX_EQ_ULONG_MAX" >&5
+printf "%s\n" "$gl_cv_test_UINT64_MAX_EQ_ULONG_MAX" >&6; }
+  if test $gl_cv_test_UINT64_MAX_EQ_ULONG_MAX = yes; then
+    UINT64_MAX_EQ_ULONG_MAX=1;
+  else
+    UINT64_MAX_EQ_ULONG_MAX=0;
+  fi
+
+
+  else
+    UINT64_MAX_EQ_ULONG_MAX=-1
+  fi
+
+
+
+
+  GL_GNULIB_IMAXABS=0
+
+
+
+  GL_GNULIB_IMAXDIV=0
+
+
+
+  GL_GNULIB_STRTOIMAX=0
+
+
+
+  GL_GNULIB_STRTOUMAX=0
+
+
+
+
+
+    HAVE_ISWBLANK=1;
+  HAVE_WCTYPE_T=1;
+  HAVE_WCTRANS_T=1;
+  REPLACE_ISWBLANK=0;
+  REPLACE_ISWDIGIT=0;
+  REPLACE_ISWXDIGIT=0;
+
+
+
+
+
+  if test $ac_cv_header_crtdefs_h = yes; then
+    HAVE_CRTDEFS_H=1
+  else
+    HAVE_CRTDEFS_H=0
+  fi
+
+
+
+
+
+
+
+
+  if test $ac_cv_func_iswcntrl = yes; then
+    HAVE_ISWCNTRL=1
+  else
+    HAVE_ISWCNTRL=0
+  fi
+
+
+
+  if test $gt_cv_c_wint_t = yes; then
+    HAVE_WINT_T=1
+  else
+    HAVE_WINT_T=0
+  fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_wctype_h='<'wctype.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <wctype.h>" >&5
+printf %s "checking absolute name of <wctype.h>... " >&6; }
+if test ${gl_cv_next_wctype_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_wctype_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <wctype.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'wctype.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_wctype_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_wctype_h
+           gl_cv_next_wctype_h='"'$gl_header'"'
+          else
+               gl_cv_next_wctype_h='<'wctype.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_wctype_h" >&5
+printf "%s\n" "$gl_cv_next_wctype_h" >&6; }
+     fi
+     NEXT_WCTYPE_H=$gl_cv_next_wctype_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'wctype.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_wctype_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_WCTYPE_H=$gl_next_as_first_directive
+
+
+
+
+  if test $ac_cv_header_wctype_h = yes; then
+    if test $ac_cv_func_iswcntrl = yes; then
+                  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether iswcntrl works" >&5
+printf %s "checking whether iswcntrl works... " >&6; }
+if test ${gl_cv_func_iswcntrl_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+          if test "$cross_compiling" = yes
+then :
+               cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdlib.h>
+                          #if __GNU_LIBRARY__ == 1
+                          Linux libc5 i18n is broken.
+                          #endif
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_func_iswcntrl_works="guessing yes"
+else $as_nop
+  gl_cv_func_iswcntrl_works="guessing no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+               #include <wchar.h>
+               #include <wctype.h>
+               int main () { return iswprint ('x') == 0; }
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_iswcntrl_works=yes
+else $as_nop
+  gl_cv_func_iswcntrl_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_iswcntrl_works" >&5
+printf "%s\n" "$gl_cv_func_iswcntrl_works" >&6; }
+    fi
+    HAVE_WCTYPE_H=1
+  else
+    HAVE_WCTYPE_H=0
+  fi
+
+
+  if test $GNULIBHEADERS_OVERRIDE_WINT_T = 1; then
+    REPLACE_ISWCNTRL=1
+  else
+    case "$gl_cv_func_iswcntrl_works" in
+      *yes) REPLACE_ISWCNTRL=0 ;;
+      *)    REPLACE_ISWCNTRL=1 ;;
+    esac
+  fi
+
+
+  if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
+        :
+  fi
+
+  if test $REPLACE_ISWCNTRL = 1; then
+    REPLACE_TOWLOWER=1
+  else
+    ac_fn_c_check_func "$LINENO" "towlower" "ac_cv_func_towlower"
+if test "x$ac_cv_func_towlower" = xyes
+then :
+  printf "%s\n" "#define HAVE_TOWLOWER 1" >>confdefs.h
+
+fi
+
+    if test $ac_cv_func_towlower = yes; then
+      REPLACE_TOWLOWER=0
+    else
+      ac_fn_check_decl "$LINENO" "towlower" "ac_cv_have_decl_towlower" "#include <wchar.h>
+          #if HAVE_WCTYPE_H
+          # include <wctype.h>
+          #endif
+
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_towlower" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_TOWLOWER $ac_have_decl" >>confdefs.h
+
+      if test $ac_cv_have_decl_towlower = yes; then
+                                REPLACE_TOWLOWER=1
+      else
+        REPLACE_TOWLOWER=0
+      fi
+    fi
+  fi
+
+
+  if test $HAVE_ISWCNTRL = 0 || test $REPLACE_TOWLOWER = 1; then
+        :
+  fi
+
+          { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for wctype_t" >&5
+printf %s "checking for wctype_t... " >&6; }
+if test ${gl_cv_type_wctype_t+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <wchar.h>
+            #if HAVE_WCTYPE_H
+            # include <wctype.h>
+            #endif
+            wctype_t a;
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_type_wctype_t=yes
+else $as_nop
+  gl_cv_type_wctype_t=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_type_wctype_t" >&5
+printf "%s\n" "$gl_cv_type_wctype_t" >&6; }
+  if test $gl_cv_type_wctype_t = no; then
+    HAVE_WCTYPE_T=0
+  fi
+
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for wctrans_t" >&5
+printf %s "checking for wctrans_t... " >&6; }
+if test ${gl_cv_type_wctrans_t+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <wchar.h>
+            #include <wctype.h>
+            wctrans_t a;
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_type_wctrans_t=yes
+else $as_nop
+  gl_cv_type_wctrans_t=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_type_wctrans_t" >&5
+printf "%s\n" "$gl_cv_type_wctrans_t" >&6; }
+  if test $gl_cv_type_wctrans_t = no; then
+    HAVE_WCTRANS_T=0
+  fi
+
+
+
+
+
+
+
+
+  GL_GNULIB_ISWBLANK=0
+
+
+
+  GL_GNULIB_ISWDIGIT=0
+
+
+
+  GL_GNULIB_ISWXDIGIT=0
+
+
+
+  GL_GNULIB_WCTYPE=0
+
+
+
+  GL_GNULIB_ISWCTYPE=0
+
+
+
+  GL_GNULIB_WCTRANS=0
+
+
+
+  GL_GNULIB_TOWCTRANS=0
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a traditional japanese locale" >&5
+printf %s "checking for a traditional japanese locale... " >&6; }
+if test ${gt_cv_locale_ja+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether MB_CUR_MAX is > 1.  This excludes the dysfunctional locales
+     on Cygwin 1.5.x.  */
+  if (MB_CUR_MAX == 1)
+    return 1;
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding (except on MirBSD).  */
+  {
+    const char *p;
+    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+    for (p = buf; *p != '\0'; p++)
+      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+        return 1;
+  }
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Note that on native Windows, the Japanese locale is
+          # Japanese_Japan.932, and CP932 is very different from EUC-JP, so we
+          # cannot use it here.
+          gt_cv_locale_ja=none
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the AIX locale name.
+          if (LC_ALL=ja_JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_ja=ja_JP
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=ja_JP.EUC-JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_ja=ja_JP.EUC-JP
+            else
+              # Test for the HP-UX, OSF/1, NetBSD locale name.
+              if (LC_ALL=ja_JP.eucJP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_ja=ja_JP.eucJP
+              else
+                # Test for the IRIX, FreeBSD locale name.
+                if (LC_ALL=ja_JP.EUC LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_ja=ja_JP.EUC
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=ja LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_ja=ja
+                  else
+                    # Special test for NetBSD 1.6.
+                    if test -f /usr/share/locale/ja_JP.eucJP/LC_CTYPE; then
+                      gt_cv_locale_ja=ja_JP.eucJP
+                    else
+                      # None found.
+                      gt_cv_locale_ja=none
+                    fi
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_ja" >&5
+printf "%s\n" "$gt_cv_locale_ja" >&6; }
+  LOCALE_JA=$gt_cv_locale_ja
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a french Unicode locale" >&5
+printf %s "checking for a french Unicode locale... " >&6; }
+if test ${gt_cv_locale_fr_utf8+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if !(defined __BEOS__ || defined __HAIKU__)
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is
+     two bytes long, with UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 4
+      || buf[1] != (char) 0xc3 || buf[2] != (char) 0xa9 || buf[3] != 'v')
+    return 1;
+#endif
+#if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+#endif
+  return 0;
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=French_France.65001 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=French_France.65001
+          else
+            # None found.
+            gt_cv_locale_fr_utf8=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr_utf8=fr_FR.UTF-8
+            else
+              # Test for the Solaris 7 locale name.
+              if (LC_ALL=fr.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr_utf8=fr.UTF-8
+              else
+                # None found.
+                gt_cv_locale_fr_utf8=none
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr_utf8" >&5
+printf "%s\n" "$gt_cv_locale_fr_utf8" >&6; }
+  LOCALE_FR_UTF8=$gt_cv_locale_fr_utf8
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a transitional chinese locale" >&5
+printf %s "checking for a transitional chinese locale... " >&6; }
+if test ${gt_cv_locale_zh_CN+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding (except on MirBSD).  */
+  {
+    const char *p;
+    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+    for (p = buf; *p != '\0'; p++)
+      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+        return 1;
+  }
+  /* Check whether a typical GB18030 multibyte sequence is recognized as a
+     single wide character.  This excludes the GB2312 and GBK encodings.  */
+  if (mblen ("\203\062\332\066", 5) != 4)
+    return 1;
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=Chinese_China.54936 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=Chinese_China.54936
+          else
+            # None found.
+            gt_cv_locale_zh_CN=none
+          fi
+          ;;
+        solaris2.8)
+          # On Solaris 8, the locales zh_CN.GB18030, zh_CN.GBK, zh.GBK are
+          # broken. One witness is the test case in gl_MBRTOWC_SANITYCHECK.
+          # Another witness is that "LC_ALL=zh_CN.GB18030 bash -c true" dumps core.
+          gt_cv_locale_zh_CN=none
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the locale name without encoding suffix.
+          if (LC_ALL=zh_CN LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=zh_CN
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=zh_CN.GB18030 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_zh_CN=zh_CN.GB18030
+            else
+              # None found.
+              gt_cv_locale_zh_CN=none
+            fi
+          fi
+          ;;
+      esac
+    else
+      # If there was a link error, due to mblen(), the system is so old that
+      # it certainly doesn't have a chinese locale.
+      gt_cv_locale_zh_CN=none
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_zh_CN" >&5
+printf "%s\n" "$gt_cv_locale_zh_CN" >&6; }
+  LOCALE_ZH_CN=$gt_cv_locale_zh_CN
+
+
+
+    HAVE_NL_LANGINFO=1;
+  REPLACE_NL_LANGINFO=0;
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_langinfo_h='<'langinfo.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <langinfo.h>" >&5
+printf %s "checking absolute name of <langinfo.h>... " >&6; }
+if test ${gl_cv_next_langinfo_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_langinfo_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <langinfo.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'langinfo.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_langinfo_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_langinfo_h
+           gl_cv_next_langinfo_h='"'$gl_header'"'
+          else
+               gl_cv_next_langinfo_h='<'langinfo.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_langinfo_h" >&5
+printf "%s\n" "$gl_cv_next_langinfo_h" >&6; }
+     fi
+     NEXT_LANGINFO_H=$gl_cv_next_langinfo_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'langinfo.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_langinfo_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H=$gl_next_as_first_directive
+
+
+
+
+
+    HAVE_LANGINFO_CODESET=0
+  HAVE_LANGINFO_T_FMT_AMPM=0
+  HAVE_LANGINFO_ALTMON=0
+  HAVE_LANGINFO_ERA=0
+  HAVE_LANGINFO_YESEXPR=0
+
+  if test $ac_cv_header_langinfo_h = yes; then
+    HAVE_LANGINFO_H=1
+                        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether langinfo.h defines CODESET" >&5
+printf %s "checking whether langinfo.h defines CODESET... " >&6; }
+if test ${gl_cv_header_langinfo_codeset+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <langinfo.h>
+int a = CODESET;
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_langinfo_codeset=yes
+else $as_nop
+  gl_cv_header_langinfo_codeset=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_langinfo_codeset" >&5
+printf "%s\n" "$gl_cv_header_langinfo_codeset" >&6; }
+    if test $gl_cv_header_langinfo_codeset = yes; then
+      HAVE_LANGINFO_CODESET=1
+    fi
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether langinfo.h defines T_FMT_AMPM" >&5
+printf %s "checking whether langinfo.h defines T_FMT_AMPM... " >&6; }
+if test ${gl_cv_header_langinfo_t_fmt_ampm+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <langinfo.h>
+int a = T_FMT_AMPM;
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_langinfo_t_fmt_ampm=yes
+else $as_nop
+  gl_cv_header_langinfo_t_fmt_ampm=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_langinfo_t_fmt_ampm" >&5
+printf "%s\n" "$gl_cv_header_langinfo_t_fmt_ampm" >&6; }
+    if test $gl_cv_header_langinfo_t_fmt_ampm = yes; then
+      HAVE_LANGINFO_T_FMT_AMPM=1
+    fi
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether langinfo.h defines ALTMON_1" >&5
+printf %s "checking whether langinfo.h defines ALTMON_1... " >&6; }
+if test ${gl_cv_header_langinfo_altmon+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <langinfo.h>
+int a = ALTMON_1;
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_langinfo_altmon=yes
+else $as_nop
+  gl_cv_header_langinfo_altmon=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_langinfo_altmon" >&5
+printf "%s\n" "$gl_cv_header_langinfo_altmon" >&6; }
+    if test $gl_cv_header_langinfo_altmon = yes; then
+      HAVE_LANGINFO_ALTMON=1
+    fi
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether langinfo.h defines ERA" >&5
+printf %s "checking whether langinfo.h defines ERA... " >&6; }
+if test ${gl_cv_header_langinfo_era+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <langinfo.h>
+int a = ERA;
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_langinfo_era=yes
+else $as_nop
+  gl_cv_header_langinfo_era=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_langinfo_era" >&5
+printf "%s\n" "$gl_cv_header_langinfo_era" >&6; }
+    if test $gl_cv_header_langinfo_era = yes; then
+      HAVE_LANGINFO_ERA=1
+    fi
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether langinfo.h defines YESEXPR" >&5
+printf %s "checking whether langinfo.h defines YESEXPR... " >&6; }
+if test ${gl_cv_header_langinfo_yesexpr+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <langinfo.h>
+int a = YESEXPR;
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_langinfo_yesexpr=yes
+else $as_nop
+  gl_cv_header_langinfo_yesexpr=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_langinfo_yesexpr" >&5
+printf "%s\n" "$gl_cv_header_langinfo_yesexpr" >&6; }
+    if test $gl_cv_header_langinfo_yesexpr = yes; then
+      HAVE_LANGINFO_YESEXPR=1
+    fi
+  else
+    HAVE_LANGINFO_H=0
+  fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+  GL_GNULIB_NL_LANGINFO=0
+
+
+
+
+    HAVE_NEWLOCALE=1;
+  HAVE_DUPLOCALE=1;
+  HAVE_FREELOCALE=1;
+  REPLACE_LOCALECONV=0;
+  REPLACE_SETLOCALE=0;
+  REPLACE_NEWLOCALE=0;
+  REPLACE_DUPLOCALE=0;
+  REPLACE_FREELOCALE=0;
+  REPLACE_STRUCT_LCONV=0;
+  LOCALENAME_ENHANCE_LOCALE_FUNCS=0;
+
+
+    REPLACE_NULL=0;
+  HAVE_MAX_ALIGN_T=1;
+  HAVE_WCHAR_T=1;
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for wchar_t" >&5
+printf %s "checking for wchar_t... " >&6; }
+if test ${gt_cv_c_wchar_t+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stddef.h>
+            wchar_t foo = (wchar_t)'\0';
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gt_cv_c_wchar_t=yes
+else $as_nop
+  gt_cv_c_wchar_t=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_c_wchar_t" >&5
+printf "%s\n" "$gt_cv_c_wchar_t" >&6; }
+  if test $gt_cv_c_wchar_t = yes; then
+
+printf "%s\n" "#define HAVE_WCHAR_T 1" >>confdefs.h
+
+  fi
+
+
+
+
+
+
+
+  STDDEF_H=
+
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for good max_align_t" >&5
+printf %s "checking for good max_align_t... " >&6; }
+if test ${gl_cv_type_max_align_t+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stddef.h>
+            unsigned int s = sizeof (max_align_t);
+            #if defined __GNUC__ || defined __clang__ || defined __IBM__ALIGNOF__
+            int check1[2 * (__alignof__ (double) <= __alignof__ (max_align_t)) - 1];
+            int check2[2 * (__alignof__ (long double) <= __alignof__ (max_align_t)) - 1];
+            #endif
+            typedef struct { char a; max_align_t b; } max_helper;
+            typedef struct { char a; long b; } long_helper;
+            typedef struct { char a; double b; } double_helper;
+            typedef struct { char a; long double b; } long_double_helper;
+            int check3[2 * (offsetof (long_helper, b) <= offsetof (max_helper, b)) - 1];
+            int check4[2 * (offsetof (double_helper, b) <= offsetof (max_helper, b)) - 1];
+            int check5[2 * (offsetof (long_double_helper, b) <= offsetof (max_helper, b)) - 1];
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_type_max_align_t=yes
+else $as_nop
+  gl_cv_type_max_align_t=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_type_max_align_t" >&5
+printf "%s\n" "$gl_cv_type_max_align_t" >&6; }
+  if test $gl_cv_type_max_align_t = no; then
+    HAVE_MAX_ALIGN_T=0
+    STDDEF_H=stddef.h
+  fi
+
+  if test $gt_cv_c_wchar_t = no; then
+    HAVE_WCHAR_T=0
+    STDDEF_H=stddef.h
+  fi
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether NULL can be used in arbitrary expressions" >&5
+printf %s "checking whether NULL can be used in arbitrary expressions... " >&6; }
+if test ${gl_cv_decl_null_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stddef.h>
+      int test[2 * (sizeof NULL == sizeof (void *)) -1];
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_decl_null_works=yes
+else $as_nop
+  gl_cv_decl_null_works=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_decl_null_works" >&5
+printf "%s\n" "$gl_cv_decl_null_works" >&6; }
+  if test $gl_cv_decl_null_works = no; then
+    REPLACE_NULL=1
+    STDDEF_H=stddef.h
+  fi
+
+
+   if test -n "$STDDEF_H"; then
+  GL_GENERATE_STDDEF_H_TRUE=
+  GL_GENERATE_STDDEF_H_FALSE='#'
+else
+  GL_GENERATE_STDDEF_H_TRUE='#'
+  GL_GENERATE_STDDEF_H_FALSE=
+fi
+
+  if test -n "$STDDEF_H"; then
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_stddef_h='<'stddef.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <stddef.h>" >&5
+printf %s "checking absolute name of <stddef.h>... " >&6; }
+if test ${gl_cv_next_stddef_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stddef.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'stddef.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_stddef_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_stddef_h
+           gl_cv_next_stddef_h='"'$gl_header'"'
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_stddef_h" >&5
+printf "%s\n" "$gl_cv_next_stddef_h" >&6; }
+     fi
+     NEXT_STDDEF_H=$gl_cv_next_stddef_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'stddef.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_stddef_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_STDDEF_H=$gl_next_as_first_directive
+
+
+
+
+  fi
+
+
+
+
+
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether locale.h defines locale_t" >&5
+printf %s "checking whether locale.h defines locale_t... " >&6; }
+if test ${gl_cv_header_locale_has_locale_t+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <locale.h>
+            locale_t x;
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_locale_has_locale_t=yes
+else $as_nop
+  gl_cv_header_locale_has_locale_t=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_locale_has_locale_t" >&5
+printf "%s\n" "$gl_cv_header_locale_has_locale_t" >&6; }
+
+
+  if test $ac_cv_header_xlocale_h = yes; then
+    HAVE_XLOCALE_H=1
+    if test $gl_cv_header_locale_has_locale_t = yes; then
+      gl_cv_header_locale_h_needs_xlocale_h=no
+    else
+      gl_cv_header_locale_h_needs_xlocale_h=yes
+    fi
+    HAVE_LOCALE_T=1
+  else
+    HAVE_XLOCALE_H=0
+    gl_cv_header_locale_h_needs_xlocale_h=no
+    if test $gl_cv_header_locale_has_locale_t = yes; then
+      HAVE_LOCALE_T=1
+    else
+      HAVE_LOCALE_T=0
+    fi
+  fi
+
+
+
+
+
+
+
+
+
+
+
+
+  case "$host_os" in
+    solaris*)
+
+printf "%s\n" "#define _LCONV_C99 1" >>confdefs.h
+
+      ;;
+  esac
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether locale.h conforms to POSIX:2001" >&5
+printf %s "checking whether locale.h conforms to POSIX:2001... " >&6; }
+if test ${gl_cv_header_locale_h_posix2001+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <locale.h>
+            int x = LC_MESSAGES;
+            int y = sizeof (((struct lconv *) 0)->decimal_point);
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_locale_h_posix2001=yes
+else $as_nop
+  gl_cv_header_locale_h_posix2001=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_locale_h_posix2001" >&5
+printf "%s\n" "$gl_cv_header_locale_h_posix2001" >&6; }
+
+          { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether struct lconv is properly defined" >&5
+printf %s "checking whether struct lconv is properly defined... " >&6; }
+if test ${gl_cv_sys_struct_lconv_ok+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <locale.h>
+            struct lconv l;
+            int x = sizeof (l.decimal_point);
+            int y = sizeof (l.int_p_cs_precedes);
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_sys_struct_lconv_ok=yes
+else $as_nop
+  gl_cv_sys_struct_lconv_ok=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_sys_struct_lconv_ok" >&5
+printf "%s\n" "$gl_cv_sys_struct_lconv_ok" >&6; }
+  if test $gl_cv_sys_struct_lconv_ok = no; then
+            case "$host_os" in
+      mingw*)
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#ifdef _MSC_VER
+ Special
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Special" >/dev/null 2>&1
+then :
+
+else $as_nop
+  REPLACE_STRUCT_LCONV=1
+fi
+rm -rf conftest*
+
+        ;;
+      *) REPLACE_STRUCT_LCONV=1 ;;
+    esac
+  fi
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_locale_h='<'locale.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <locale.h>" >&5
+printf %s "checking absolute name of <locale.h>... " >&6; }
+if test ${gl_cv_next_locale_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <locale.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'locale.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_locale_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_locale_h
+           gl_cv_next_locale_h='"'$gl_header'"'
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_locale_h" >&5
+printf "%s\n" "$gl_cv_next_locale_h" >&6; }
+     fi
+     NEXT_LOCALE_H=$gl_cv_next_locale_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'locale.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_locale_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_LOCALE_H=$gl_next_as_first_directive
+
+
+
+
+
+
+
+
+
+
+
+  GL_GNULIB_LOCALECONV=0
+
+
+
+  GL_GNULIB_SETLOCALE=0
+
+
+
+  GL_GNULIB_SETLOCALE_NULL=0
+
+
+
+  GL_GNULIB_DUPLOCALE=0
+
+
+
+  GL_GNULIB_LOCALENAME=0
+
+
+
+
+
+  gl_threads_api=none
+  LIBTHREAD=
+  LTLIBTHREAD=
+  LIBMULTITHREAD=
+  LTLIBMULTITHREAD=
+  if test "$gl_use_threads" != no; then
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether imported symbols can be declared weak" >&5
+printf %s "checking whether imported symbols can be declared weak... " >&6; }
+if test ${gl_cv_have_weak+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_cv_have_weak=no
+          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+extern void xyzzy ();
+#pragma weak xyzzy
+int
+main (void)
+{
+xyzzy();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_have_weak=maybe
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+     if test $gl_cv_have_weak = maybe; then
+                     if test "$cross_compiling" = yes
+then :
+                      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef __ELF__
+             Extensible Linking Format
+             #endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Extensible Linking Format" >/dev/null 2>&1
+then :
+  gl_cv_have_weak="guessing yes"
+else $as_nop
+  gl_cv_have_weak="guessing no"
+fi
+rm -rf conftest*
+
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdio.h>
+#pragma weak fputs
+int main ()
+{
+  return (fputs == NULL);
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_have_weak=yes
+else $as_nop
+  gl_cv_have_weak=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+     fi
+          case " $LDFLAGS " in
+       *" -static "*) gl_cv_have_weak=no ;;
+     esac
+                    case "$gl_cv_have_weak" in
+       *yes)
+         case "$host_os" in
+           freebsd* | dragonfly* | midnightbsd*)
+             : > conftest1.c
+             $CC $CPPFLAGS $CFLAGS $LDFLAGS -fPIC -shared -o libempty.so conftest1.c -lpthread >&5 2>&1
+             cat <<EOF > conftest2.c
+#include <pthread.h>
+#pragma weak pthread_mutexattr_gettype
+int main ()
+{
+  return (pthread_mutexattr_gettype != NULL);
+}
+EOF
+             $CC $CPPFLAGS $CFLAGS $LDFLAGS -o conftest conftest2.c libempty.so >&5 2>&1 \
+               || gl_cv_have_weak=no
+             rm -f conftest1.c libempty.so conftest2.c conftest
+             ;;
+         esac
+         ;;
+     esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_have_weak" >&5
+printf "%s\n" "$gl_cv_have_weak" >&6; }
+  case "$gl_cv_have_weak" in
+    *yes)
+
+printf "%s\n" "#define HAVE_WEAK_SYMBOLS 1" >>confdefs.h
+
+      ;;
+  esac
+
+    if case "$gl_cv_have_weak" in *yes) true;; *) false;; esac; then
+
+      :
+    fi
+    if test "$gl_use_threads" = isoc || test "$gl_use_threads" = isoc+posix; then
+
+      gl_have_isoc_threads="$ac_cv_header_threads_h"
+    fi
+    if test "$gl_use_threads" = yes \
+       || test "$gl_use_threads" = posix \
+       || test "$gl_use_threads" = isoc+posix; then
+
+
+  if test -z "$gl_pthreadlib_body_done"; then
+    gl_pthread_api=no
+    LIBPTHREAD=
+    LIBPMULTITHREAD=
+    # On OSF/1, the compiler needs the flag -pthread or -D_REENTRANT so that
+    # it groks <pthread.h>. It's added above, in gl_ANYTHREADLIB_EARLY.
+    ac_fn_c_check_header_compile "$LINENO" "pthread.h" "ac_cv_header_pthread_h" "$ac_includes_default"
+if test "x$ac_cv_header_pthread_h" = xyes
+then :
+  gl_have_pthread_h=yes
+else $as_nop
+  gl_have_pthread_h=no
+fi
+
+    if test "$gl_have_pthread_h" = yes; then
+      # Other possible tests:
+      #   -lpthreads (FSU threads, PCthreads)
+      #   -lgthreads
+      # Test whether both pthread_mutex_lock and pthread_mutexattr_init exist
+      # in libc. IRIX 6.5 has the first one in both libc and libpthread, but
+      # the second one only in libpthread, and lock.c needs it.
+      #
+      # If -pthread works, prefer it to -lpthread, since Ubuntu 14.04
+      # needs -pthread for some reason.  See:
+      # https://lists.gnu.org/r/bug-gnulib/2014-09/msg00023.html
+      save_LIBS=$LIBS
+      for gl_pthread in '' '-pthread'; do
+        LIBS="$LIBS $gl_pthread"
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pthread.h>
+               pthread_mutex_t m;
+               pthread_mutexattr_t ma;
+
+int
+main (void)
+{
+pthread_mutex_lock (&m);
+               pthread_mutexattr_init (&ma);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_pthread_api=yes
+           LIBPTHREAD=$gl_pthread
+           LIBPMULTITHREAD=$gl_pthread
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+        LIBS=$save_LIBS
+        test $gl_pthread_api = yes && break
+      done
+      echo "$as_me:18770: gl_pthread_api=$gl_pthread_api" >&5
+      echo "$as_me:18771: LIBPTHREAD=$LIBPTHREAD" >&5
+
+      gl_pthread_in_glibc=no
+      # On Linux with glibc >= 2.34, libc contains the fully functional
+      # pthread functions.
+      case "$host_os" in
+        linux*)
+          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <features.h>
+             #ifdef __GNU_LIBRARY__
+              #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 34) || (__GLIBC__ > 2)
+               Lucky user
+              #endif
+             #endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Lucky user" >/dev/null 2>&1
+then :
+  gl_pthread_in_glibc=yes
+fi
+rm -rf conftest*
+
+          ;;
+      esac
+      echo "$as_me:18797: gl_pthread_in_glibc=$gl_pthread_in_glibc" >&5
+
+      # Test for libpthread by looking for pthread_kill. (Not pthread_self,
+      # since it is defined as a macro on OSF/1.)
+      if test $gl_pthread_api = yes && test -z "$LIBPTHREAD"; then
+        # The program links fine without libpthread. But it may actually
+        # need to link with libpthread in order to create multiple threads.
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pthread_kill in -lpthread" >&5
+printf %s "checking for pthread_kill in -lpthread... " >&6; }
+if test ${ac_cv_lib_pthread_pthread_kill+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lpthread  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char pthread_kill ();
+int
+main (void)
+{
+return pthread_kill ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_pthread_pthread_kill=yes
+else $as_nop
+  ac_cv_lib_pthread_pthread_kill=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_pthread_pthread_kill" >&5
+printf "%s\n" "$ac_cv_lib_pthread_pthread_kill" >&6; }
+if test "x$ac_cv_lib_pthread_pthread_kill" = xyes
+then :
+  if test $gl_pthread_in_glibc = yes; then
+             LIBPMULTITHREAD=
+           else
+             LIBPMULTITHREAD=-lpthread
+             # On Solaris and HP-UX, most pthread functions exist also in libc.
+             # Therefore pthread_in_use() needs to actually try to create a
+             # thread: pthread_create from libc will fail, whereas
+             # pthread_create will actually create a thread.
+             # On Solaris 10 or newer, this test is no longer needed, because
+             # libc contains the fully functional pthread functions.
+             case "$host_os" in
+               solaris | solaris2.1-9 | solaris2.1-9.* | hpux*)
+
+printf "%s\n" "#define PTHREAD_IN_USE_DETECTION_HARD 1" >>confdefs.h
+
+             esac
+           fi
+
+fi
+
+      elif test $gl_pthread_api != yes; then
+        # Some library is needed. Try libpthread and libc_r.
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pthread_kill in -lpthread" >&5
+printf %s "checking for pthread_kill in -lpthread... " >&6; }
+if test ${ac_cv_lib_pthread_pthread_kill+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lpthread  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char pthread_kill ();
+int
+main (void)
+{
+return pthread_kill ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_pthread_pthread_kill=yes
+else $as_nop
+  ac_cv_lib_pthread_pthread_kill=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_pthread_pthread_kill" >&5
+printf "%s\n" "$ac_cv_lib_pthread_pthread_kill" >&6; }
+if test "x$ac_cv_lib_pthread_pthread_kill" = xyes
+then :
+  gl_pthread_api=yes
+           LIBPTHREAD=-lpthread
+           LIBPMULTITHREAD=-lpthread
+fi
+
+        if test $gl_pthread_api != yes; then
+          # For FreeBSD 4.
+          { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pthread_kill in -lc_r" >&5
+printf %s "checking for pthread_kill in -lc_r... " >&6; }
+if test ${ac_cv_lib_c_r_pthread_kill+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lc_r  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char pthread_kill ();
+int
+main (void)
+{
+return pthread_kill ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_c_r_pthread_kill=yes
+else $as_nop
+  ac_cv_lib_c_r_pthread_kill=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_c_r_pthread_kill" >&5
+printf "%s\n" "$ac_cv_lib_c_r_pthread_kill" >&6; }
+if test "x$ac_cv_lib_c_r_pthread_kill" = xyes
+then :
+  gl_pthread_api=yes
+             LIBPTHREAD=-lc_r
+             LIBPMULTITHREAD=-lc_r
+fi
+
+        fi
+      fi
+      echo "$as_me:18951: LIBPMULTITHREAD=$LIBPMULTITHREAD" >&5
+    fi
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether POSIX threads API is available" >&5
+printf %s "checking whether POSIX threads API is available... " >&6; }
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_pthread_api" >&5
+printf "%s\n" "$gl_pthread_api" >&6; }
+
+
+    if test $gl_pthread_api = yes; then
+
+printf "%s\n" "#define HAVE_PTHREAD_API 1" >>confdefs.h
+
+    fi
+
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sched.h>
+int
+main (void)
+{
+sched_yield ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  LIB_SCHED_YIELD=
+
+else $as_nop
+         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for sched_yield in -lrt" >&5
+printf %s "checking for sched_yield in -lrt... " >&6; }
+if test ${ac_cv_lib_rt_sched_yield+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lrt  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char sched_yield ();
+int
+main (void)
+{
+return sched_yield ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_rt_sched_yield=yes
+else $as_nop
+  ac_cv_lib_rt_sched_yield=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_rt_sched_yield" >&5
+printf "%s\n" "$ac_cv_lib_rt_sched_yield" >&6; }
+if test "x$ac_cv_lib_rt_sched_yield" = xyes
+then :
+  LIB_SCHED_YIELD=-lrt
+else $as_nop
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for sched_yield in -lposix4" >&5
+printf %s "checking for sched_yield in -lposix4... " >&6; }
+if test ${ac_cv_lib_posix4_sched_yield+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lposix4  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char sched_yield ();
+int
+main (void)
+{
+return sched_yield ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_posix4_sched_yield=yes
+else $as_nop
+  ac_cv_lib_posix4_sched_yield=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_posix4_sched_yield" >&5
+printf "%s\n" "$ac_cv_lib_posix4_sched_yield" >&6; }
+if test "x$ac_cv_lib_posix4_sched_yield" = xyes
+then :
+  LIB_SCHED_YIELD=-lposix4
+fi
+
+fi
+
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+
+
+    gl_pthreadlib_body_done=done
+  fi
+
+      LIBTHREAD=$LIBPTHREAD LTLIBTHREAD=$LIBPTHREAD
+      LIBMULTITHREAD=$LIBPMULTITHREAD LTLIBMULTITHREAD=$LIBPMULTITHREAD
+      if test $gl_pthread_api = yes; then
+        if test "$gl_use_threads" = isoc+posix && test "$gl_have_isoc_threads" = yes; then
+          gl_threads_api='isoc+posix'
+
+printf "%s\n" "#define USE_ISOC_AND_POSIX_THREADS 1" >>confdefs.h
+
+          LIBTHREAD= LTLIBTHREAD=
+        else
+          gl_threads_api=posix
+
+printf "%s\n" "#define USE_POSIX_THREADS 1" >>confdefs.h
+
+          if test -z "$LIBMULTITHREAD" && test -z "$LTLIBMULTITHREAD"; then
+
+printf "%s\n" "#define USE_POSIX_THREADS_FROM_LIBC 1" >>confdefs.h
+
+          else
+            if case "$gl_cv_have_weak" in *yes) true;; *) false;; esac; then
+
+printf "%s\n" "#define USE_POSIX_THREADS_WEAK 1" >>confdefs.h
+
+              LIBTHREAD= LTLIBTHREAD=
+            else
+              case "$host_os" in
+                freebsd* | dragonfly* | midnightbsd*)
+                  if test "x$LIBTHREAD" != "x$LIBMULTITHREAD"; then
+
+printf "%s\n" "#define PTHREAD_IN_USE_DETECTION_HARD 1" >>confdefs.h
+
+                  fi
+                  ;;
+              esac
+            fi
+          fi
+        fi
+      fi
+    fi
+    if test $gl_threads_api = none; then
+      if test "$gl_use_threads" = isoc && test "$gl_have_isoc_threads" = yes; then
+
+
+
+  if test -z "$gl_stdthreadlib_body_done"; then
+
+
+    case "$host_os" in
+      mingw*)
+        LIBSTDTHREAD=
+        ;;
+      *)
+
+
+  if test -z "$gl_pthreadlib_body_done"; then
+    gl_pthread_api=no
+    LIBPTHREAD=
+    LIBPMULTITHREAD=
+    # On OSF/1, the compiler needs the flag -pthread or -D_REENTRANT so that
+    # it groks <pthread.h>. It's added above, in gl_ANYTHREADLIB_EARLY.
+    ac_fn_c_check_header_compile "$LINENO" "pthread.h" "ac_cv_header_pthread_h" "$ac_includes_default"
+if test "x$ac_cv_header_pthread_h" = xyes
+then :
+  gl_have_pthread_h=yes
+else $as_nop
+  gl_have_pthread_h=no
+fi
+
+    if test "$gl_have_pthread_h" = yes; then
+      # Other possible tests:
+      #   -lpthreads (FSU threads, PCthreads)
+      #   -lgthreads
+      # Test whether both pthread_mutex_lock and pthread_mutexattr_init exist
+      # in libc. IRIX 6.5 has the first one in both libc and libpthread, but
+      # the second one only in libpthread, and lock.c needs it.
+      #
+      # If -pthread works, prefer it to -lpthread, since Ubuntu 14.04
+      # needs -pthread for some reason.  See:
+      # https://lists.gnu.org/r/bug-gnulib/2014-09/msg00023.html
+      save_LIBS=$LIBS
+      for gl_pthread in '' '-pthread'; do
+        LIBS="$LIBS $gl_pthread"
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pthread.h>
+               pthread_mutex_t m;
+               pthread_mutexattr_t ma;
+
+int
+main (void)
+{
+pthread_mutex_lock (&m);
+               pthread_mutexattr_init (&ma);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_pthread_api=yes
+           LIBPTHREAD=$gl_pthread
+           LIBPMULTITHREAD=$gl_pthread
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+        LIBS=$save_LIBS
+        test $gl_pthread_api = yes && break
+      done
+      echo "$as_me:19179: gl_pthread_api=$gl_pthread_api" >&5
+      echo "$as_me:19180: LIBPTHREAD=$LIBPTHREAD" >&5
+
+      gl_pthread_in_glibc=no
+      # On Linux with glibc >= 2.34, libc contains the fully functional
+      # pthread functions.
+      case "$host_os" in
+        linux*)
+          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <features.h>
+             #ifdef __GNU_LIBRARY__
+              #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 34) || (__GLIBC__ > 2)
+               Lucky user
+              #endif
+             #endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Lucky user" >/dev/null 2>&1
+then :
+  gl_pthread_in_glibc=yes
+fi
+rm -rf conftest*
+
+          ;;
+      esac
+      echo "$as_me:19206: gl_pthread_in_glibc=$gl_pthread_in_glibc" >&5
+
+      # Test for libpthread by looking for pthread_kill. (Not pthread_self,
+      # since it is defined as a macro on OSF/1.)
+      if test $gl_pthread_api = yes && test -z "$LIBPTHREAD"; then
+        # The program links fine without libpthread. But it may actually
+        # need to link with libpthread in order to create multiple threads.
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pthread_kill in -lpthread" >&5
+printf %s "checking for pthread_kill in -lpthread... " >&6; }
+if test ${ac_cv_lib_pthread_pthread_kill+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lpthread  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char pthread_kill ();
+int
+main (void)
+{
+return pthread_kill ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_pthread_pthread_kill=yes
+else $as_nop
+  ac_cv_lib_pthread_pthread_kill=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_pthread_pthread_kill" >&5
+printf "%s\n" "$ac_cv_lib_pthread_pthread_kill" >&6; }
+if test "x$ac_cv_lib_pthread_pthread_kill" = xyes
+then :
+  if test $gl_pthread_in_glibc = yes; then
+             LIBPMULTITHREAD=
+           else
+             LIBPMULTITHREAD=-lpthread
+             # On Solaris and HP-UX, most pthread functions exist also in libc.
+             # Therefore pthread_in_use() needs to actually try to create a
+             # thread: pthread_create from libc will fail, whereas
+             # pthread_create will actually create a thread.
+             # On Solaris 10 or newer, this test is no longer needed, because
+             # libc contains the fully functional pthread functions.
+             case "$host_os" in
+               solaris | solaris2.1-9 | solaris2.1-9.* | hpux*)
+
+printf "%s\n" "#define PTHREAD_IN_USE_DETECTION_HARD 1" >>confdefs.h
+
+             esac
+           fi
+
+fi
+
+      elif test $gl_pthread_api != yes; then
+        # Some library is needed. Try libpthread and libc_r.
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pthread_kill in -lpthread" >&5
+printf %s "checking for pthread_kill in -lpthread... " >&6; }
+if test ${ac_cv_lib_pthread_pthread_kill+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lpthread  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char pthread_kill ();
+int
+main (void)
+{
+return pthread_kill ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_pthread_pthread_kill=yes
+else $as_nop
+  ac_cv_lib_pthread_pthread_kill=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_pthread_pthread_kill" >&5
+printf "%s\n" "$ac_cv_lib_pthread_pthread_kill" >&6; }
+if test "x$ac_cv_lib_pthread_pthread_kill" = xyes
+then :
+  gl_pthread_api=yes
+           LIBPTHREAD=-lpthread
+           LIBPMULTITHREAD=-lpthread
+fi
+
+        if test $gl_pthread_api != yes; then
+          # For FreeBSD 4.
+          { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pthread_kill in -lc_r" >&5
+printf %s "checking for pthread_kill in -lc_r... " >&6; }
+if test ${ac_cv_lib_c_r_pthread_kill+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lc_r  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char pthread_kill ();
+int
+main (void)
+{
+return pthread_kill ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_c_r_pthread_kill=yes
+else $as_nop
+  ac_cv_lib_c_r_pthread_kill=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_c_r_pthread_kill" >&5
+printf "%s\n" "$ac_cv_lib_c_r_pthread_kill" >&6; }
+if test "x$ac_cv_lib_c_r_pthread_kill" = xyes
+then :
+  gl_pthread_api=yes
+             LIBPTHREAD=-lc_r
+             LIBPMULTITHREAD=-lc_r
+fi
+
+        fi
+      fi
+      echo "$as_me:19360: LIBPMULTITHREAD=$LIBPMULTITHREAD" >&5
+    fi
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether POSIX threads API is available" >&5
+printf %s "checking whether POSIX threads API is available... " >&6; }
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_pthread_api" >&5
+printf "%s\n" "$gl_pthread_api" >&6; }
+
+
+    if test $gl_pthread_api = yes; then
+
+printf "%s\n" "#define HAVE_PTHREAD_API 1" >>confdefs.h
+
+    fi
+
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sched.h>
+int
+main (void)
+{
+sched_yield ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  LIB_SCHED_YIELD=
+
+else $as_nop
+         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for sched_yield in -lrt" >&5
+printf %s "checking for sched_yield in -lrt... " >&6; }
+if test ${ac_cv_lib_rt_sched_yield+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lrt  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char sched_yield ();
+int
+main (void)
+{
+return sched_yield ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_rt_sched_yield=yes
+else $as_nop
+  ac_cv_lib_rt_sched_yield=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_rt_sched_yield" >&5
+printf "%s\n" "$ac_cv_lib_rt_sched_yield" >&6; }
+if test "x$ac_cv_lib_rt_sched_yield" = xyes
+then :
+  LIB_SCHED_YIELD=-lrt
+else $as_nop
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for sched_yield in -lposix4" >&5
+printf %s "checking for sched_yield in -lposix4... " >&6; }
+if test ${ac_cv_lib_posix4_sched_yield+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lposix4  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char sched_yield ();
+int
+main (void)
+{
+return sched_yield ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_posix4_sched_yield=yes
+else $as_nop
+  ac_cv_lib_posix4_sched_yield=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_posix4_sched_yield" >&5
+printf "%s\n" "$ac_cv_lib_posix4_sched_yield" >&6; }
+if test "x$ac_cv_lib_posix4_sched_yield" = xyes
+then :
+  LIB_SCHED_YIELD=-lposix4
+fi
+
+fi
+
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+
+
+    gl_pthreadlib_body_done=done
+  fi
+
+        if test $ac_cv_header_threads_h = yes; then
+                                                            ac_fn_c_check_func "$LINENO" "thrd_create" "ac_cv_func_thrd_create"
+if test "x$ac_cv_func_thrd_create" = xyes
+then :
+  printf "%s\n" "#define HAVE_THRD_CREATE 1" >>confdefs.h
+
+fi
+
+          if test $ac_cv_func_thrd_create = yes; then
+            LIBSTDTHREAD=
+          else
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for thrd_create in -lstdthreads" >&5
+printf %s "checking for thrd_create in -lstdthreads... " >&6; }
+if test ${ac_cv_lib_stdthreads_thrd_create+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lstdthreads  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char thrd_create ();
+int
+main (void)
+{
+return thrd_create ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_stdthreads_thrd_create=yes
+else $as_nop
+  ac_cv_lib_stdthreads_thrd_create=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_stdthreads_thrd_create" >&5
+printf "%s\n" "$ac_cv_lib_stdthreads_thrd_create" >&6; }
+if test "x$ac_cv_lib_stdthreads_thrd_create" = xyes
+then :
+
+              LIBSTDTHREAD='-lstdthreads -lpthread'
+
+else $as_nop
+
+                            LIBSTDTHREAD="$LIBPMULTITHREAD"
+
+fi
+
+          fi
+        else
+                    LIBSTDTHREAD="$LIBPMULTITHREAD $LIB_SCHED_YIELD"
+        fi
+        ;;
+    esac
+
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether ISO C threads API is available" >&5
+printf %s "checking whether ISO C threads API is available... " >&6; }
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_threads_h" >&5
+printf "%s\n" "$ac_cv_header_threads_h" >&6; }
+    gl_stdthreadlib_body_done=done
+  fi
+
+        LIBTHREAD=$LIBSTDTHREAD LTLIBTHREAD=$LIBSTDTHREAD
+        LIBMULTITHREAD=$LIBSTDTHREAD LTLIBMULTITHREAD=$LIBSTDTHREAD
+        gl_threads_api=isoc
+
+printf "%s\n" "#define USE_ISOC_THREADS 1" >>confdefs.h
+
+      fi
+    fi
+    if test $gl_threads_api = none; then
+      case "$gl_use_threads" in
+        yes | windows | win32) # The 'win32' is for backward compatibility.
+          if { case "$host_os" in
+                 mingw*) true;;
+                 *) false;;
+               esac
+             }; then
+            gl_threads_api=windows
+
+printf "%s\n" "#define USE_WINDOWS_THREADS 1" >>confdefs.h
+
+          fi
+          ;;
+      esac
+    fi
+  fi
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for multithread API to use" >&5
+printf %s "checking for multithread API to use... " >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_threads_api" >&5
+printf "%s\n" "$gl_threads_api" >&6; }
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  case "$host_os" in
+    mingw*) WINDOWS_STAT_INODES=1 ;;
+    *)      WINDOWS_STAT_INODES=0 ;;
+  esac
+
+
+
+
+
+printf "%s\n" "#define _USE_STD_STAT 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_sys_types_h='<'sys/types.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <sys/types.h>" >&5
+printf %s "checking absolute name of <sys/types.h>... " >&6; }
+if test ${gl_cv_next_sys_types_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'sys/types.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_sys_types_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_sys_types_h
+           gl_cv_next_sys_types_h='"'$gl_header'"'
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_sys_types_h" >&5
+printf "%s\n" "$gl_cv_next_sys_types_h" >&6; }
+     fi
+     NEXT_SYS_TYPES_H=$gl_cv_next_sys_types_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'sys/types.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_sys_types_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H=$gl_next_as_first_directive
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
+printf %s "checking for a sed that does not truncate output... " >&6; }
+if test ${ac_cv_path_SED+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+            ac_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/
+     for ac_i in 1 2 3 4 5 6 7; do
+       ac_script="$ac_script$as_nl$ac_script"
+     done
+     echo "$ac_script" 2>/dev/null | sed 99q >conftest.sed
+     { ac_script=; unset ac_script;}
+     if test -z "$SED"; then
+  ac_path_SED_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_prog in sed gsed
+   do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_SED="$as_dir$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_SED" || continue
+# Check for GNU ac_path_SED and select it if it is found.
+  # Check for GNU $ac_path_SED
+case `"$ac_path_SED" --version 2>&1` in
+*GNU*)
+  ac_cv_path_SED="$ac_path_SED" ac_path_SED_found=:;;
+*)
+  ac_count=0
+  printf %s 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    printf "%s\n" '' >> "conftest.nl"
+    "$ac_path_SED" -f conftest.sed < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_SED_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_SED="$ac_path_SED"
+      ac_path_SED_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_SED_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_SED"; then
+    as_fn_error $? "no acceptable sed could be found in \$PATH" "$LINENO" 5
+  fi
+else
+  ac_cv_path_SED=$SED
+fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_SED" >&5
+printf "%s\n" "$ac_cv_path_SED" >&6; }
+ SED="$ac_cv_path_SED"
+  rm -f conftest.sed
+
+
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether malloc (0) returns nonnull" >&5
+printf %s "checking whether malloc (0) returns nonnull... " >&6; }
+if test ${ac_cv_func_malloc_0_nonnull+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+          # Guess yes on platforms where we know the result.
+          *-gnu* | freebsd* | netbsd* | openbsd* | bitrig* \
+          | gnu* | *-musl* | midnightbsd* \
+          | hpux* | solaris* | cygwin* | mingw* | msys* )
+            ac_cv_func_malloc_0_nonnull="guessing yes" ;;
+          # If we don't know, obey --enable-cross-guesses.
+          *) ac_cv_func_malloc_0_nonnull="$gl_cross_guess_normal" ;;
+        esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdlib.h>
+
+int
+main (void)
+{
+void *p = malloc (0);
+            int result = !p;
+            free (p);
+            return result;
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  ac_cv_func_malloc_0_nonnull=yes
+else $as_nop
+  ac_cv_func_malloc_0_nonnull=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_malloc_0_nonnull" >&5
+printf "%s\n" "$ac_cv_func_malloc_0_nonnull" >&6; }
+  case $ac_cv_func_malloc_0_nonnull in #(
+  *yes) :
+    gl_cv_func_malloc_0_nonnull=1 ;; #(
+  *) :
+    gl_cv_func_malloc_0_nonnull=0 ;;
+esac
+
+
+printf "%s\n" "#define MALLOC_0_IS_NONNULL $gl_cv_func_malloc_0_nonnull" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+        if case "$host_os" in
+       mingw*) true ;;
+       *) test $ac_cv_func_mbsinit = yes ;;
+     esac \
+    && test $ac_cv_func_mbrtowc = yes; then
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc handles incomplete characters" >&5
+printf %s "checking whether mbrtowc handles incomplete characters... " >&6; }
+if test ${gl_cv_func_mbrtowc_incomplete_state+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                     # Guess no on AIX and OSF/1.
+        aix* | osf*) gl_cv_func_mbrtowc_incomplete_state="guessing no" ;;
+                     # Guess yes otherwise.
+        *)           gl_cv_func_mbrtowc_incomplete_state="guessing yes" ;;
+      esac
+      if test $LOCALE_JA != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      const char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        if (mbsinit (&state))
+          return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_incomplete_state=yes
+else $as_nop
+  gl_cv_func_mbrtowc_incomplete_state=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      else
+        if test $LOCALE_FR_UTF8 != none; then
+          if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      const char input[] = "B\303\274\303\237er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        if (mbsinit (&state))
+          return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_incomplete_state=yes
+else $as_nop
+  gl_cv_func_mbrtowc_incomplete_state=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+        fi
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_incomplete_state" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_incomplete_state" >&6; }
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc works as well as mbtowc" >&5
+printf %s "checking whether mbrtowc works as well as mbtowc... " >&6; }
+if test ${gl_cv_func_mbrtowc_sanitycheck+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                    # Guess no on Solaris 8.
+        solaris2.8) gl_cv_func_mbrtowc_sanitycheck="guessing no" ;;
+                    # Guess yes otherwise.
+        *)          gl_cv_func_mbrtowc_sanitycheck="guessing yes" ;;
+      esac
+      if test $LOCALE_ZH_CN != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  /* This fails on Solaris 8:
+     mbrtowc returns 2, and sets wc to 0x00F0.
+     mbtowc returns 4 (correct) and sets wc to 0x5EDC.  */
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      char input[] = "B\250\271\201\060\211\070er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 3, 6, &state) != 4
+          && mbtowc (&wc, input + 3, 6) == 4)
+        return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_sanitycheck=yes
+else $as_nop
+  gl_cv_func_mbrtowc_sanitycheck=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_sanitycheck" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_sanitycheck" >&6; }
+
+    REPLACE_MBSTATE_T=0
+    case "$gl_cv_func_mbrtowc_incomplete_state" in
+      *yes) ;;
+      *) REPLACE_MBSTATE_T=1 ;;
+    esac
+    case "$gl_cv_func_mbrtowc_sanitycheck" in
+      *yes) ;;
+      *) REPLACE_MBSTATE_T=1 ;;
+    esac
+  else
+    REPLACE_MBSTATE_T=1
+  fi
+
+
+
+  if test $ac_cv_func_mbrtowc = no; then
+    HAVE_MBRTOWC=0
+    ac_fn_check_decl "$LINENO" "mbrtowc" "ac_cv_have_decl_mbrtowc" "
+      #include <wchar.h>
+
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_mbrtowc" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_MBRTOWC $ac_have_decl" >>confdefs.h
+
+    if test $ac_cv_have_decl_mbrtowc = yes; then
+                        REPLACE_MBRTOWC=1
+    fi
+  else
+    if test $REPLACE_MBSTATE_T = 1; then
+      REPLACE_MBRTOWC=1
+    else
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc handles a NULL pwc argument" >&5
+printf %s "checking whether mbrtowc handles a NULL pwc argument... " >&6; }
+if test ${gl_cv_func_mbrtowc_null_arg1+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                  # Guess no on Solaris.
+        solaris*) gl_cv_func_mbrtowc_null_arg1="guessing no" ;;
+                  # Guess yes otherwise.
+        *)        gl_cv_func_mbrtowc_null_arg1="guessing yes" ;;
+      esac
+      if test $LOCALE_FR_UTF8 != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  int result = 0;
+
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      char input[] = "\303\237er";
+      mbstate_t state;
+      wchar_t wc;
+      size_t ret;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      wc = (wchar_t) 0xBADFACE;
+      ret = mbrtowc (&wc, input, 5, &state);
+      if (ret != 2)
+        result |= 1;
+      if (!mbsinit (&state))
+        result |= 2;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      ret = mbrtowc (NULL, input, 5, &state);
+      if (ret != 2) /* Solaris 7 fails here: ret is -1.  */
+        result |= 4;
+      if (!mbsinit (&state))
+        result |= 8;
+    }
+  return result;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_null_arg1=yes
+else $as_nop
+  gl_cv_func_mbrtowc_null_arg1=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_null_arg1" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_null_arg1" >&6; }
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc handles a NULL string argument" >&5
+printf %s "checking whether mbrtowc handles a NULL string argument... " >&6; }
+if test ${gl_cv_func_mbrtowc_null_arg2+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+              # Guess no on OSF/1.
+        osf*) gl_cv_func_mbrtowc_null_arg2="guessing no" ;;
+              # Guess yes otherwise.
+        *)    gl_cv_func_mbrtowc_null_arg2="guessing yes" ;;
+      esac
+      if test $LOCALE_FR_UTF8 != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      mbstate_t state;
+      wchar_t wc;
+      int ret;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      wc = (wchar_t) 0xBADFACE;
+      mbrtowc (&wc, NULL, 5, &state);
+      /* Check that wc was not modified.  */
+      if (wc != (wchar_t) 0xBADFACE)
+        return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_null_arg2=yes
+else $as_nop
+  gl_cv_func_mbrtowc_null_arg2=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_null_arg2" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_null_arg2" >&6; }
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc has a correct return value" >&5
+printf %s "checking whether mbrtowc has a correct return value... " >&6; }
+if test ${gl_cv_func_mbrtowc_retval+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                                   # Guess no on HP-UX, Solaris, native Windows.
+        hpux* | solaris* | mingw*) gl_cv_func_mbrtowc_retval="guessing no" ;;
+                                   # Guess yes otherwise.
+        *)                         gl_cv_func_mbrtowc_retval="guessing yes" ;;
+      esac
+      if test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none \
+         || { case "$host_os" in mingw*) true;; *) false;; esac; }; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  int result = 0;
+  int found_some_locale = 0;
+  /* This fails on Solaris.  */
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      char input[] = "B\303\274\303\237er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        {
+          input[1] = '\0';
+          if (mbrtowc (&wc, input + 2, 5, &state) != 1)
+            result |= 1;
+        }
+      found_some_locale = 1;
+    }
+  /* This fails on HP-UX 11.11.  */
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        {
+          input[1] = '\0';
+          if (mbrtowc (&wc, input + 2, 5, &state) != 2)
+            result |= 2;
+        }
+      found_some_locale = 1;
+    }
+  /* This fails on native Windows.  */
+  if (setlocale (LC_ALL, "Japanese_Japan.932") != NULL)
+    {
+      char input[] = "<\223\372\226\173\214\352>"; /* "<日本語>" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 3, 1, &state) == (size_t)(-2))
+        {
+          input[3] = '\0';
+          if (mbrtowc (&wc, input + 4, 4, &state) != 1)
+            result |= 4;
+        }
+      found_some_locale = 1;
+    }
+  if (setlocale (LC_ALL, "Chinese_Taiwan.950") != NULL)
+    {
+      char input[] = "<\244\351\245\273\273\171>"; /* "<日本語>" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 3, 1, &state) == (size_t)(-2))
+        {
+          input[3] = '\0';
+          if (mbrtowc (&wc, input + 4, 4, &state) != 1)
+            result |= 8;
+        }
+      found_some_locale = 1;
+    }
+  if (setlocale (LC_ALL, "Chinese_China.936") != NULL)
+    {
+      char input[] = "<\310\325\261\276\325\132>"; /* "<日本語>" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 3, 1, &state) == (size_t)(-2))
+        {
+          input[3] = '\0';
+          if (mbrtowc (&wc, input + 4, 4, &state) != 1)
+            result |= 16;
+        }
+      found_some_locale = 1;
+    }
+  return (found_some_locale ? result : 77);
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_retval=yes
+else $as_nop
+  if test $? != 77; then
+             gl_cv_func_mbrtowc_retval=no
+           fi
+
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_retval" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_retval" >&6; }
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc returns 0 when parsing a NUL character" >&5
+printf %s "checking whether mbrtowc returns 0 when parsing a NUL character... " >&6; }
+if test ${gl_cv_func_mbrtowc_nul_retval+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                       # Guess no on Solaris 8 and 9.
+        solaris2.[89]) gl_cv_func_mbrtowc_nul_retval="guessing no" ;;
+                       # Guess yes otherwise.
+        *)             gl_cv_func_mbrtowc_nul_retval="guessing yes" ;;
+      esac
+      if test $LOCALE_ZH_CN != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  /* This fails on Solaris 8 and 9.  */
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "", 1, &state) != 0)
+        return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_nul_retval=yes
+else $as_nop
+  gl_cv_func_mbrtowc_nul_retval=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_nul_retval" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_nul_retval" >&6; }
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc stores incomplete characters" >&5
+printf %s "checking whether mbrtowc stores incomplete characters... " >&6; }
+if test ${gl_cv_func_mbrtowc_stores_incomplete+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+               case "$host_os" in
+               # Guess yes on native Windows.
+       mingw*) gl_cv_func_mbrtowc_stores_incomplete="guessing yes" ;;
+       *)      gl_cv_func_mbrtowc_stores_incomplete="guessing no" ;;
+     esac
+     case "$host_os" in
+       mingw*)
+         if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  int result = 0;
+  if (setlocale (LC_ALL, "French_France.65001") != NULL)
+    {
+      wchar_t wc = (wchar_t) 0xBADFACE;
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "\303", 1, &state) == (size_t)(-2)
+          && wc != (wchar_t) 0xBADFACE)
+        result |= 1;
+    }
+  if (setlocale (LC_ALL, "Japanese_Japan.932") != NULL)
+    {
+      wchar_t wc = (wchar_t) 0xBADFACE;
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "\226", 1, &state) == (size_t)(-2)
+          && wc != (wchar_t) 0xBADFACE)
+        result |= 2;
+    }
+  if (setlocale (LC_ALL, "Chinese_Taiwan.950") != NULL)
+    {
+      wchar_t wc = (wchar_t) 0xBADFACE;
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "\245", 1, &state) == (size_t)(-2)
+          && wc != (wchar_t) 0xBADFACE)
+        result |= 4;
+    }
+  if (setlocale (LC_ALL, "Chinese_China.936") != NULL)
+    {
+      wchar_t wc = (wchar_t) 0xBADFACE;
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "\261", 1, &state) == (size_t)(-2)
+          && wc != (wchar_t) 0xBADFACE)
+        result |= 8;
+    }
+  return result;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_stores_incomplete=no
+else $as_nop
+  gl_cv_func_mbrtowc_stores_incomplete=yes
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+         ;;
+       *)
+
+         if test $LOCALE_FR_UTF8 != none; then
+           if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      wchar_t wc = (wchar_t) 0xBADFACE;
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "\303", 1, &state) == (size_t)(-2)
+          && wc != (wchar_t) 0xBADFACE)
+        return 1;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_stores_incomplete=no
+else $as_nop
+  gl_cv_func_mbrtowc_stores_incomplete=yes
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+         fi
+         ;;
+     esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_stores_incomplete" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_stores_incomplete" >&6; }
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc works on empty input" >&5
+printf %s "checking whether mbrtowc works on empty input... " >&6; }
+if test ${gl_cv_func_mbrtowc_empty_input+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                              # Guess no on AIX and glibc systems.
+        aix* | *-gnu* | gnu*) gl_cv_func_mbrtowc_empty_input="guessing no" ;;
+                              # Guess yes on native Windows.
+        mingw*)               gl_cv_func_mbrtowc_empty_input="guessing yes" ;;
+        *)                    gl_cv_func_mbrtowc_empty_input="guessing yes" ;;
+      esac
+      if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+           #include <wchar.h>
+           static wchar_t wc;
+           static mbstate_t mbs;
+           int
+           main (void)
+           {
+             return mbrtowc (&wc, "", 0, &mbs) != (size_t) -2;
+           }
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_empty_input=yes
+else $as_nop
+  gl_cv_func_mbrtowc_empty_input=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_empty_input" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_empty_input" >&6; }
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the C locale is free of encoding errors" >&5
+printf %s "checking whether the C locale is free of encoding errors... " >&6; }
+if test ${gl_cv_func_mbrtowc_C_locale_sans_EILSEQ+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+               gl_cv_func_mbrtowc_C_locale_sans_EILSEQ="$gl_cross_guess_normal"
+
+     if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                 # Guess yes on native Windows.
+         mingw*) gl_cv_func_mbrtowc_C_locale_sans_EILSEQ="guessing yes" ;;
+       esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <limits.h>
+            #include <locale.h>
+            #include <wchar.h>
+
+int
+main (void)
+{
+
+            int i;
+            char *locale = setlocale (LC_ALL, "C");
+            if (! locale)
+              return 2;
+            for (i = CHAR_MIN; i <= CHAR_MAX; i++)
+              {
+                char c = i;
+                wchar_t wc;
+                mbstate_t mbs = { 0, };
+                size_t ss = mbrtowc (&wc, &c, 1, &mbs);
+                if (1 < ss)
+                  return 3;
+              }
+            return 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_C_locale_sans_EILSEQ=yes
+else $as_nop
+  gl_cv_func_mbrtowc_C_locale_sans_EILSEQ=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_C_locale_sans_EILSEQ" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_C_locale_sans_EILSEQ" >&6; }
+
+      case "$gl_cv_func_mbrtowc_null_arg1" in
+        *yes) ;;
+        *)
+printf "%s\n" "#define MBRTOWC_NULL_ARG1_BUG 1" >>confdefs.h
+
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_null_arg2" in
+        *yes) ;;
+        *)
+printf "%s\n" "#define MBRTOWC_NULL_ARG2_BUG 1" >>confdefs.h
+
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_retval" in
+        *yes) ;;
+        *)
+printf "%s\n" "#define MBRTOWC_RETVAL_BUG 1" >>confdefs.h
+
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_nul_retval" in
+        *yes) ;;
+        *)
+printf "%s\n" "#define MBRTOWC_NUL_RETVAL_BUG 1" >>confdefs.h
+
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_stores_incomplete" in
+        *no) ;;
+        *)
+printf "%s\n" "#define MBRTOWC_STORES_INCOMPLETE_BUG 1" >>confdefs.h
+
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_empty_input" in
+        *yes) ;;
+        *)
+printf "%s\n" "#define MBRTOWC_EMPTY_INPUT_BUG 1" >>confdefs.h
+
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_C_locale_sans_EILSEQ" in
+        *yes) ;;
+        *)
+printf "%s\n" "#define MBRTOWC_IN_C_LOCALE_MAYBE_EILSEQ 1" >>confdefs.h
+
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+    fi
+  fi
+  if test $REPLACE_MBSTATE_T = 1; then
+    case "$host_os" in
+      mingw*) LIB_MBRTOWC= ;;
+      *)
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether imported symbols can be declared weak" >&5
+printf %s "checking whether imported symbols can be declared weak... " >&6; }
+if test ${gl_cv_have_weak+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_cv_have_weak=no
+          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+extern void xyzzy ();
+#pragma weak xyzzy
+int
+main (void)
+{
+xyzzy();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_have_weak=maybe
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+     if test $gl_cv_have_weak = maybe; then
+                     if test "$cross_compiling" = yes
+then :
+                      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef __ELF__
+             Extensible Linking Format
+             #endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Extensible Linking Format" >/dev/null 2>&1
+then :
+  gl_cv_have_weak="guessing yes"
+else $as_nop
+  gl_cv_have_weak="guessing no"
+fi
+rm -rf conftest*
+
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdio.h>
+#pragma weak fputs
+int main ()
+{
+  return (fputs == NULL);
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_have_weak=yes
+else $as_nop
+  gl_cv_have_weak=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+     fi
+          case " $LDFLAGS " in
+       *" -static "*) gl_cv_have_weak=no ;;
+     esac
+                    case "$gl_cv_have_weak" in
+       *yes)
+         case "$host_os" in
+           freebsd* | dragonfly* | midnightbsd*)
+             : > conftest1.c
+             $CC $CPPFLAGS $CFLAGS $LDFLAGS -fPIC -shared -o libempty.so conftest1.c -lpthread >&5 2>&1
+             cat <<EOF > conftest2.c
+#include <pthread.h>
+#pragma weak pthread_mutexattr_gettype
+int main ()
+{
+  return (pthread_mutexattr_gettype != NULL);
+}
+EOF
+             $CC $CPPFLAGS $CFLAGS $LDFLAGS -o conftest conftest2.c libempty.so >&5 2>&1 \
+               || gl_cv_have_weak=no
+             rm -f conftest1.c libempty.so conftest2.c conftest
+             ;;
+         esac
+         ;;
+     esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_have_weak" >&5
+printf "%s\n" "$gl_cv_have_weak" >&6; }
+  case "$gl_cv_have_weak" in
+    *yes)
+
+printf "%s\n" "#define HAVE_WEAK_SYMBOLS 1" >>confdefs.h
+
+      ;;
+  esac
+
+        case "$gl_cv_have_weak" in
+          *yes) LIB_MBRTOWC= ;;
+          *)    LIB_MBRTOWC="$LIBPTHREAD" ;;
+        esac
+        ;;
+    esac
+  else
+    LIB_MBRTOWC=
+  fi
+
+
+
+
+
+  GL_GNULIB_EXPLICIT_BZERO=0
+
+
+
+  GL_GNULIB_FFSL=0
+
+
+
+  GL_GNULIB_FFSLL=0
+
+
+
+  GL_GNULIB_MEMCHR=0
+
+
+
+  GL_GNULIB_MEMMEM=0
+
+
+
+  GL_GNULIB_MEMPCPY=0
+
+
+
+  GL_GNULIB_MEMRCHR=0
+
+
+
+  GL_GNULIB_RAWMEMCHR=0
+
+
+
+  GL_GNULIB_STPCPY=0
+
+
+
+  GL_GNULIB_STPNCPY=0
+
+
+
+  GL_GNULIB_STRCHRNUL=0
+
+
+
+  GL_GNULIB_STRDUP=0
+
+
+
+  GL_GNULIB_STRNCAT=0
+
+
+
+  GL_GNULIB_STRNDUP=0
+
+
+
+  GL_GNULIB_STRNLEN=0
+
+
+
+  GL_GNULIB_STRPBRK=0
+
+
+
+  GL_GNULIB_STRSEP=0
+
+
+
+  GL_GNULIB_STRSTR=0
+
+
+
+  GL_GNULIB_STRCASESTR=0
+
+
+
+  GL_GNULIB_STRTOK_R=0
+
+
+
+  GL_GNULIB_MBSLEN=0
+
+
+
+  GL_GNULIB_MBSNLEN=0
+
+
+
+  GL_GNULIB_MBSCHR=0
+
+
+
+  GL_GNULIB_MBSRCHR=0
+
+
+
+  GL_GNULIB_MBSSTR=0
+
+
+
+  GL_GNULIB_MBSCASECMP=0
+
+
+
+  GL_GNULIB_MBSNCASECMP=0
+
+
+
+  GL_GNULIB_MBSPCASECMP=0
+
+
+
+  GL_GNULIB_MBSCASESTR=0
+
+
+
+  GL_GNULIB_MBSCSPN=0
+
+
+
+  GL_GNULIB_MBSPBRK=0
+
+
+
+  GL_GNULIB_MBSSPN=0
+
+
+
+  GL_GNULIB_MBSSEP=0
+
+
+
+  GL_GNULIB_MBSTOK_R=0
+
+
+
+  GL_GNULIB_STRERROR=0
+
+
+
+  GL_GNULIB_STRERROR_R=0
+
+
+
+  GL_GNULIB_STRERRORNAME_NP=0
+
+
+
+  GL_GNULIB_SIGABBREV_NP=0
+
+
+
+  GL_GNULIB_SIGDESCR_NP=0
+
+
+
+  GL_GNULIB_STRSIGNAL=0
+
+
+
+  GL_GNULIB_STRVERSCMP=0
+
+
+
+  GL_GNULIB_MDA_MEMCCPY=1
+
+
+
+  GL_GNULIB_MDA_STRDUP=1
+
+
+
+
+  HAVE_MBSLEN=0;
+    HAVE_EXPLICIT_BZERO=1;
+  HAVE_FFSL=1;
+  HAVE_FFSLL=1;
+  HAVE_DECL_MEMMEM=1;
+  HAVE_MEMPCPY=1;
+  HAVE_DECL_MEMRCHR=1;
+  HAVE_RAWMEMCHR=1;
+  HAVE_STPCPY=1;
+  HAVE_STPNCPY=1;
+  HAVE_STRCHRNUL=1;
+  HAVE_DECL_STRDUP=1;
+  HAVE_DECL_STRNDUP=1;
+  HAVE_DECL_STRNLEN=1;
+  HAVE_STRPBRK=1;
+  HAVE_STRSEP=1;
+  HAVE_STRCASESTR=1;
+  HAVE_DECL_STRTOK_R=1;
+  HAVE_DECL_STRERROR_R=1;
+  HAVE_STRERRORNAME_NP=1;
+  HAVE_SIGABBREV_NP=1;
+  HAVE_SIGDESCR_NP=1;
+  HAVE_DECL_STRSIGNAL=1;
+  HAVE_STRVERSCMP=1;
+  REPLACE_FFSLL=0;
+  REPLACE_MEMCHR=0;
+  REPLACE_MEMMEM=0;
+  REPLACE_STPNCPY=0;
+  REPLACE_STRCHRNUL=0;
+  REPLACE_STRDUP=0;
+  REPLACE_STRNCAT=0;
+  REPLACE_STRNDUP=0;
+  REPLACE_STRNLEN=0;
+  REPLACE_STRSTR=0;
+  REPLACE_STRCASESTR=0;
+  REPLACE_STRTOK_R=0;
+  REPLACE_STRERROR=0;
+  REPLACE_STRERROR_R=0;
+  REPLACE_STRERRORNAME_NP=0;
+  REPLACE_STRSIGNAL=0;
+  UNDEFINE_STRTOK_R=0;
+
+
+
+
+
+  # Check for mmap(). Don't use AC_FUNC_MMAP, because it checks too much: it
+  # fails on HP-UX 11, because MAP_FIXED mappings do not work. But this is
+  # irrelevant for anonymous mappings.
+  ac_fn_c_check_func "$LINENO" "mmap" "ac_cv_func_mmap"
+if test "x$ac_cv_func_mmap" = xyes
+then :
+  gl_have_mmap=yes
+else $as_nop
+  gl_have_mmap=no
+fi
+
+
+  # Try to allow MAP_ANONYMOUS.
+  gl_have_mmap_anonymous=no
+  if test $gl_have_mmap = yes; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for MAP_ANONYMOUS" >&5
+printf %s "checking for MAP_ANONYMOUS... " >&6; }
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <sys/mman.h>
+#ifdef MAP_ANONYMOUS
+    I cannot identify this map
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "I cannot identify this map" >/dev/null 2>&1
+then :
+  gl_have_mmap_anonymous=yes
+fi
+rm -rf conftest*
+
+    if test $gl_have_mmap_anonymous != yes; then
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <sys/mman.h>
+#ifdef MAP_ANON
+    I cannot identify this map
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "I cannot identify this map" >/dev/null 2>&1
+then :
+
+printf "%s\n" "#define MAP_ANONYMOUS MAP_ANON" >>confdefs.h
+
+         gl_have_mmap_anonymous=yes
+fi
+rm -rf conftest*
+
+    fi
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_have_mmap_anonymous" >&5
+printf "%s\n" "$gl_have_mmap_anonymous" >&6; }
+    if test $gl_have_mmap_anonymous = yes; then
+
+printf "%s\n" "#define HAVE_MAP_ANONYMOUS 1" >>confdefs.h
+
+    fi
+  fi
+
+
+
+
+
+
+
+
+
+
+  # Detect platform-specific bugs in some versions of glibc:
+  # memchr should not dereference anything with length 0
+  #   https://bugzilla.redhat.com/show_bug.cgi?id=499689
+  # memchr should not dereference overestimated length after a match
+  #   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=521737
+  #   https://sourceware.org/bugzilla/show_bug.cgi?id=10162
+  # memchr should cast the second argument to 'unsigned char'.
+  #   This bug exists in Android 4.3.
+  # Assume that memchr works on platforms that lack mprotect.
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether memchr works" >&5
+printf %s "checking whether memchr works... " >&6; }
+if test ${gl_cv_func_memchr_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                           # Guess no on Android.
+          linux*-android*) gl_cv_func_memchr_works="guessing no" ;;
+                           # Guess yes on native Windows.
+          mingw*)          gl_cv_func_memchr_works="guessing yes" ;;
+                           # If we don't know, obey --enable-cross-guesses.
+          *)               gl_cv_func_memchr_works="$gl_cross_guess_normal" ;;
+        esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <string.h>
+#if HAVE_SYS_MMAN_H
+# include <fcntl.h>
+# include <unistd.h>
+# include <sys/types.h>
+# include <sys/mman.h>
+# ifndef MAP_FILE
+#  define MAP_FILE 0
+# endif
+#endif
+
+int
+main (void)
+{
+
+  int result = 0;
+  char *fence = NULL;
+#if HAVE_SYS_MMAN_H && HAVE_MPROTECT
+# if HAVE_MAP_ANONYMOUS
+  const int flags = MAP_ANONYMOUS | MAP_PRIVATE;
+  const int fd = -1;
+# else /* !HAVE_MAP_ANONYMOUS */
+  const int flags = MAP_FILE | MAP_PRIVATE;
+  int fd = open ("/dev/zero", O_RDONLY, 0666);
+  if (fd >= 0)
+# endif
+    {
+      int pagesize = getpagesize ();
+      char *two_pages =
+        (char *) mmap (NULL, 2 * pagesize, PROT_READ | PROT_WRITE,
+                       flags, fd, 0);
+      if (two_pages != (char *)(-1)
+          && mprotect (two_pages + pagesize, pagesize, PROT_NONE) == 0)
+        fence = two_pages + pagesize;
+    }
+#endif
+  if (fence)
+    {
+      /* Test against bugs on glibc systems.  */
+      if (memchr (fence, 0, 0))
+        result |= 1;
+      strcpy (fence - 9, "12345678");
+      if (memchr (fence - 9, 0, 79) != fence - 1)
+        result |= 2;
+      if (memchr (fence - 1, 0, 3) != fence - 1)
+        result |= 4;
+      /* Test against bug on AIX 7.2.  */
+      if (memchr (fence - 4, '6', 16) != fence - 4)
+        result |= 8;
+    }
+  /* Test against bug on Android 4.3.  */
+  {
+    char input[3];
+    input[0] = 'a';
+    input[1] = 'b';
+    input[2] = 'c';
+    if (memchr (input, 0x789abc00 | 'b', 3) != input + 1)
+      result |= 16;
+  }
+  return result;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_memchr_works=yes
+else $as_nop
+  gl_cv_func_memchr_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_memchr_works" >&5
+printf "%s\n" "$gl_cv_func_memchr_works" >&6; }
+  case "$gl_cv_func_memchr_works" in
+    *yes) ;;
+    *) REPLACE_MEMCHR=1 ;;
+  esac
+
+ac_fn_check_decl "$LINENO" "memrchr" "ac_cv_have_decl_memrchr" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_memrchr" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_MEMRCHR $ac_have_decl" >>confdefs.h
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether <limits.h> defines MIN and MAX" >&5
+printf %s "checking whether <limits.h> defines MIN and MAX... " >&6; }
+if test ${gl_cv_minmax_in_limits_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <limits.h>
+            int x = MIN (42, 17);
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_minmax_in_limits_h=yes
+else $as_nop
+  gl_cv_minmax_in_limits_h=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_minmax_in_limits_h" >&5
+printf "%s\n" "$gl_cv_minmax_in_limits_h" >&6; }
+  if test $gl_cv_minmax_in_limits_h = yes; then
+
+printf "%s\n" "#define HAVE_MINMAX_IN_LIMITS_H 1" >>confdefs.h
+
+  fi
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether <sys/param.h> defines MIN and MAX" >&5
+printf %s "checking whether <sys/param.h> defines MIN and MAX... " >&6; }
+if test ${gl_cv_minmax_in_sys_param_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/param.h>
+            int x = MIN (42, 17);
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_minmax_in_sys_param_h=yes
+else $as_nop
+  gl_cv_minmax_in_sys_param_h=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_minmax_in_sys_param_h" >&5
+printf "%s\n" "$gl_cv_minmax_in_sys_param_h" >&6; }
+  if test $gl_cv_minmax_in_sys_param_h = yes; then
+
+printf "%s\n" "#define HAVE_MINMAX_IN_SYS_PARAM_H 1" >>confdefs.h
+
+  fi
+
+
+
+
+
+
+
+
+
+
+    HAVE_POSIX_SIGNALBLOCKING=1;
+  HAVE_PTHREAD_SIGMASK=1;
+  HAVE_RAISE=1;
+  HAVE_SIGSET_T=1;
+  HAVE_SIGINFO_T=1;
+  HAVE_SIGACTION=1;
+  HAVE_STRUCT_SIGACTION_SA_SIGACTION=1;
+
+  HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=1;
+
+  HAVE_SIGHANDLER_T=1;
+  REPLACE_PTHREAD_SIGMASK=0;
+  REPLACE_RAISE=0;
+
+
+  ac_fn_c_check_type "$LINENO" "sigset_t" "ac_cv_type_sigset_t" "
+      #include <signal.h>
+      /* Mingw defines sigset_t not in <signal.h>, but in <sys/types.h>.  */
+      #include <sys/types.h>
+
+"
+if test "x$ac_cv_type_sigset_t" = xyes
+then :
+
+printf "%s\n" "#define HAVE_SIGSET_T 1" >>confdefs.h
+
+gl_cv_type_sigset_t=yes
+else $as_nop
+  gl_cv_type_sigset_t=no
+fi
+
+  if test $gl_cv_type_sigset_t != yes; then
+    HAVE_SIGSET_T=0
+  fi
+
+
+
+  GL_GNULIB_PTHREAD_SIGMASK=0
+
+
+
+  GL_GNULIB_RAISE=0
+
+
+
+  GL_GNULIB_SIGNAL_H_SIGPIPE=0
+
+
+
+  GL_GNULIB_SIGPROCMASK=0
+
+
+
+  GL_GNULIB_SIGACTION=0
+
+
+
+
+
+
+  if test $REPLACE_MALLOC = 1; then
+    REPLACE_REALLOC=1
+  fi
+
+ac_fn_check_decl "$LINENO" "alarm" "ac_cv_have_decl_alarm" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_alarm" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_ALARM $ac_have_decl" >>confdefs.h
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ssize_t" >&5
+printf %s "checking for ssize_t... " >&6; }
+if test ${gt_cv_ssize_t+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+int
+main (void)
+{
+int x = sizeof (ssize_t *) + sizeof (ssize_t);
+            return !x;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gt_cv_ssize_t=yes
+else $as_nop
+  gt_cv_ssize_t=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_ssize_t" >&5
+printf "%s\n" "$gt_cv_ssize_t" >&6; }
+  if test $gt_cv_ssize_t = no; then
+
+printf "%s\n" "#define ssize_t int" >>confdefs.h
+
+  fi
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for uid_t in sys/types.h" >&5
+printf %s "checking for uid_t in sys/types.h... " >&6; }
+if test ${ac_cv_type_uid_t+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "uid_t" >/dev/null 2>&1
+then :
+  ac_cv_type_uid_t=yes
+else $as_nop
+  ac_cv_type_uid_t=no
+fi
+rm -rf conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_type_uid_t" >&5
+printf "%s\n" "$ac_cv_type_uid_t" >&6; }
+if test $ac_cv_type_uid_t = no; then
+
+printf "%s\n" "#define uid_t int" >>confdefs.h
+
+
+printf "%s\n" "#define gid_t int" >>confdefs.h
+
+fi
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_signal_h='<'signal.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <signal.h>" >&5
+printf %s "checking absolute name of <signal.h>... " >&6; }
+if test ${gl_cv_next_signal_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <signal.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'signal.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_signal_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_signal_h
+           gl_cv_next_signal_h='"'$gl_header'"'
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_signal_h" >&5
+printf "%s\n" "$gl_cv_next_signal_h" >&6; }
+     fi
+     NEXT_SIGNAL_H=$gl_cv_next_signal_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'signal.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_signal_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H=$gl_next_as_first_directive
+
+
+
+
+
+# AIX declares sig_atomic_t to already include volatile, and C89 compilers
+# then choke on 'volatile sig_atomic_t'.  C99 requires that it compile.
+  ac_fn_c_check_type "$LINENO" "volatile sig_atomic_t" "ac_cv_type_volatile_sig_atomic_t" "
+#include <signal.h>
+
+"
+if test "x$ac_cv_type_volatile_sig_atomic_t" = xyes
+then :
+
+else $as_nop
+  HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=0
+fi
+
+
+
+
+
+
+
+  ac_fn_c_check_type "$LINENO" "sighandler_t" "ac_cv_type_sighandler_t" "
+#include <signal.h>
+
+"
+if test "x$ac_cv_type_sighandler_t" = xyes
+then :
+
+else $as_nop
+  HAVE_SIGHANDLER_T=0
+fi
+
+
+
+
+
+
+
+
+
+
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for stdbool.h that conforms to C99" >&5
+printf %s "checking for stdbool.h that conforms to C99... " >&6; }
+if test ${ac_cv_header_stdbool_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+             #include <stdbool.h>
+
+             #ifdef __cplusplus
+              typedef bool Bool;
+             #else
+              typedef _Bool Bool;
+              #ifndef bool
+               "error: bool is not defined"
+              #endif
+              #ifndef false
+               "error: false is not defined"
+              #endif
+              #if false
+               "error: false is not 0"
+              #endif
+              #ifndef true
+               "error: true is not defined"
+              #endif
+              #if true != 1
+               "error: true is not 1"
+              #endif
+             #endif
+
+             #ifndef __bool_true_false_are_defined
+              "error: __bool_true_false_are_defined is not defined"
+             #endif
+
+             struct s { Bool s: 1; Bool t; bool u: 1; bool v; } s;
+
+             char a[true == 1 ? 1 : -1];
+             char b[false == 0 ? 1 : -1];
+             char c[__bool_true_false_are_defined == 1 ? 1 : -1];
+             char d[(bool) 0.5 == true ? 1 : -1];
+             /* See body of main program for 'e'.  */
+             char f[(Bool) 0.0 == false ? 1 : -1];
+             char g[true];
+             char h[sizeof (Bool)];
+             char i[sizeof s.t];
+             enum { j = false, k = true, l = false * true, m = true * 256 };
+             /* The following fails for
+                HP aC++/ANSI C B3910B A.05.55 [Dec 04 2003]. */
+             Bool n[m];
+             char o[sizeof n == m * sizeof n[0] ? 1 : -1];
+             char p[-1 - (Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1];
+             /* Catch a bug in an HP-UX C compiler.  See
+                https://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
+                https://lists.gnu.org/r/bug-coreutils/2005-11/msg00161.html
+              */
+             Bool q = true;
+             Bool *pq = &q;
+             bool *qq = &q;
+
+int
+main (void)
+{
+
+             bool e = &s;
+             *pq |= q; *pq |= ! q;
+             *qq |= q; *qq |= ! q;
+             /* Refer to every declared value, to avoid compiler optimizations.  */
+             return (!a + !b + !c + !d + !e + !f + !g + !h + !i + !!j + !k + !!l
+                     + !m + !n + !o + !p + !q + !pq + !qq);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_header_stdbool_h=yes
+else $as_nop
+  ac_cv_header_stdbool_h=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stdbool_h" >&5
+printf "%s\n" "$ac_cv_header_stdbool_h" >&6; }
+   ac_fn_c_check_type "$LINENO" "_Bool" "ac_cv_type__Bool" "$ac_includes_default"
+if test "x$ac_cv_type__Bool" = xyes
+then :
+
+printf "%s\n" "#define HAVE__BOOL 1" >>confdefs.h
+
+
+fi
+
+
+
+
+ac_fn_check_decl "$LINENO" "fcloseall" "ac_cv_have_decl_fcloseall" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_fcloseall" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_FCLOSEALL $ac_have_decl" >>confdefs.h
+
+
+
+
+  printf "%s\n" "#define __USE_MINGW_ANSI_STDIO 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_stdio_h='<'stdio.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <stdio.h>" >&5
+printf %s "checking absolute name of <stdio.h>... " >&6; }
+if test ${gl_cv_next_stdio_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdio.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'stdio.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_stdio_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_stdio_h
+           gl_cv_next_stdio_h='"'$gl_header'"'
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_stdio_h" >&5
+printf "%s\n" "$gl_cv_next_stdio_h" >&6; }
+     fi
+     NEXT_STDIO_H=$gl_cv_next_stdio_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'stdio.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_stdio_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_STDIO_H=$gl_next_as_first_directive
+
+
+
+
+
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking which flavor of printf attribute matches inttypes macros" >&5
+printf %s "checking which flavor of printf attribute matches inttypes macros... " >&6; }
+if test ${gl_cv_func_printf_attribute_flavor+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+       #define __STDC_FORMAT_MACROS 1
+       #include <stdio.h>
+       #include <inttypes.h>
+       /* For non-mingw systems, compilation will trivially succeed.
+          For mingw, compilation will succeed for older mingw (system
+          printf, "I64d") and fail for newer mingw (gnu printf, "lld"). */
+       #if (defined _WIN32 && ! defined __CYGWIN__) && \
+         (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+       extern char PRIdMAX_probe[sizeof PRIdMAX == sizeof "I64d" ? 1 : -1];
+       #endif
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_func_printf_attribute_flavor=system
+else $as_nop
+  gl_cv_func_printf_attribute_flavor=gnu
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_printf_attribute_flavor" >&5
+printf "%s\n" "$gl_cv_func_printf_attribute_flavor" >&6; }
+  if test "$gl_cv_func_printf_attribute_flavor" = gnu; then
+
+printf "%s\n" "#define GNULIB_PRINTF_ATTRIBUTE_FLAVOR_GNU 1" >>confdefs.h
+
+  fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+  if test $ac_cv_have_decl_fcloseall = no; then
+    HAVE_DECL_FCLOSEALL=0
+  fi
+
+ac_fn_check_decl "$LINENO" "ecvt" "ac_cv_have_decl_ecvt" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_ecvt" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_ECVT $ac_have_decl" >>confdefs.h
+
+ac_fn_check_decl "$LINENO" "fcvt" "ac_cv_have_decl_fcvt" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_fcvt" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_FCVT $ac_have_decl" >>confdefs.h
+
+ac_fn_check_decl "$LINENO" "gcvt" "ac_cv_have_decl_gcvt" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_gcvt" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_GCVT $ac_have_decl" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_stdlib_h='<'stdlib.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <stdlib.h>" >&5
+printf %s "checking absolute name of <stdlib.h>... " >&6; }
+if test ${gl_cv_next_stdlib_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdlib.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'stdlib.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_stdlib_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_stdlib_h
+           gl_cv_next_stdlib_h='"'$gl_header'"'
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_stdlib_h" >&5
+printf "%s\n" "$gl_cv_next_stdlib_h" >&6; }
+     fi
+     NEXT_STDLIB_H=$gl_cv_next_stdlib_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'stdlib.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_stdlib_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_STDLIB_H=$gl_next_as_first_directive
+
+
+
+
+
+
+
+
+
+
+
+
+  if test $ac_cv_have_decl_ecvt = no; then
+    HAVE_DECL_ECVT=0
+  fi
+
+  if test $ac_cv_have_decl_fcvt = no; then
+    HAVE_DECL_FCVT=0
+  fi
+
+  if test $ac_cv_have_decl_gcvt = no; then
+    HAVE_DECL_GCVT=0
+  fi
+
+ac_fn_check_decl "$LINENO" "strdup" "ac_cv_have_decl_strdup" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_strdup" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_STRDUP $ac_have_decl" >>confdefs.h
+
+
+     REPLACE_STRERROR_0=0
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether strerror(0) succeeds" >&5
+printf %s "checking whether strerror(0) succeeds... " >&6; }
+if test ${gl_cv_func_strerror_0_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                        # Guess yes on glibc systems.
+         *-gnu* | gnu*) gl_cv_func_strerror_0_works="guessing yes" ;;
+                        # Guess yes on musl systems.
+         *-musl*)       gl_cv_func_strerror_0_works="guessing yes" ;;
+                        # Guess yes on native Windows.
+         mingw*)        gl_cv_func_strerror_0_works="guessing yes" ;;
+                        # If we don't know, obey --enable-cross-guesses.
+         *)             gl_cv_func_strerror_0_works="$gl_cross_guess_normal" ;;
+       esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <string.h>
+           #include <errno.h>
+
+int
+main (void)
+{
+int result = 0;
+           char *str;
+           errno = 0;
+           str = strerror (0);
+           if (!*str) result |= 1;
+           if (errno) result |= 2;
+           if (strstr (str, "nknown") || strstr (str, "ndefined"))
+             result |= 4;
+           return result;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_strerror_0_works=yes
+else $as_nop
+  gl_cv_func_strerror_0_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_strerror_0_works" >&5
+printf "%s\n" "$gl_cv_func_strerror_0_works" >&6; }
+  case "$gl_cv_func_strerror_0_works" in
+    *yes) ;;
+    *)
+      REPLACE_STRERROR_0=1
+
+printf "%s\n" "#define REPLACE_STRERROR_0 1" >>confdefs.h
+
+      ;;
+  esac
+
+
+
+
+
+
+
+
+  if test $ac_cv_func_strerror_r = yes; then
+    if test "$ERRNO_H:$REPLACE_STRERROR_0" = :0; then
+                        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for strerror_r with POSIX signature" >&5
+printf %s "checking for strerror_r with POSIX signature... " >&6; }
+if test ${gl_cv_func_strerror_r_posix_signature+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <string.h>
+                int strerror_r (int, char *, size_t);
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_func_strerror_r_posix_signature=yes
+else $as_nop
+  gl_cv_func_strerror_r_posix_signature=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_strerror_r_posix_signature" >&5
+printf "%s\n" "$gl_cv_func_strerror_r_posix_signature" >&6; }
+      if test $gl_cv_func_strerror_r_posix_signature = yes; then
+                                                        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether strerror_r works" >&5
+printf %s "checking whether strerror_r works... " >&6; }
+if test ${gl_cv_func_strerror_r_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+
+              case "$host_os" in
+                       # Guess no on AIX.
+                aix*)  gl_cv_func_strerror_r_works="guessing no";;
+                       # Guess no on HP-UX.
+                hpux*) gl_cv_func_strerror_r_works="guessing no";;
+                       # Guess no on BSD variants.
+                *bsd*)  gl_cv_func_strerror_r_works="guessing no";;
+                       # Guess yes otherwise.
+                *)     gl_cv_func_strerror_r_works="guessing yes";;
+              esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <errno.h>
+                  #include <string.h>
+
+int
+main (void)
+{
+int result = 0;
+                  char buf[79];
+                  if (strerror_r (EACCES, buf, 0) < 0)
+                    result |= 1;
+                  errno = 0;
+                  if (strerror_r (EACCES, buf, sizeof buf) != 0)
+                    result |= 2;
+                  strcpy (buf, "Unknown");
+                  if (strerror_r (0, buf, sizeof buf) != 0)
+                    result |= 4;
+                  if (errno)
+                    result |= 8;
+                  if (strstr (buf, "nknown") || strstr (buf, "ndefined"))
+                    result |= 0x10;
+                  errno = 0;
+                  *buf = 0;
+                  if (strerror_r (-3, buf, sizeof buf) < 0)
+                    result |= 0x20;
+                  if (errno)
+                    result |= 0x40;
+                  if (!*buf)
+                    result |= 0x80;
+                  return result;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_strerror_r_works=yes
+else $as_nop
+  gl_cv_func_strerror_r_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_strerror_r_works" >&5
+printf "%s\n" "$gl_cv_func_strerror_r_works" >&6; }
+      else
+
+                        if test $ac_cv_func___xpg_strerror_r = yes; then
+          { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether __xpg_strerror_r works" >&5
+printf %s "checking whether __xpg_strerror_r works... " >&6; }
+if test ${gl_cv_func_strerror_r_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+                                  gl_cv_func_strerror_r_works="$gl_cross_guess_normal"
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <errno.h>
+                    #include <string.h>
+                    extern
+                    #ifdef __cplusplus
+                    "C"
+                    #endif
+                    int __xpg_strerror_r(int, char *, size_t);
+
+int
+main (void)
+{
+int result = 0;
+                    char buf[256] = "^";
+                    char copy[256];
+                    char *str = strerror (-1);
+                    strcpy (copy, str);
+                    if (__xpg_strerror_r (-2, buf, 1) == 0)
+                      result |= 1;
+                    if (*buf)
+                      result |= 2;
+                    __xpg_strerror_r (-2, buf, 256);
+                    if (strcmp (str, copy))
+                      result |= 4;
+                    return result;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_strerror_r_works=yes
+else $as_nop
+  gl_cv_func_strerror_r_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_strerror_r_works" >&5
+printf "%s\n" "$gl_cv_func_strerror_r_works" >&6; }
+        fi
+      fi
+    fi
+  fi
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_string_h='<'string.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <string.h>" >&5
+printf %s "checking absolute name of <string.h>... " >&6; }
+if test ${gl_cv_next_string_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <string.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'string.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_string_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_string_h
+           gl_cv_next_string_h='"'$gl_header'"'
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_string_h" >&5
+printf "%s\n" "$gl_cv_next_string_h" >&6; }
+     fi
+     NEXT_STRING_H=$gl_cv_next_string_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'string.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_string_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_STRING_H=$gl_next_as_first_directive
+
+
+
+
+
+
+
+
+
+
+
+ac_fn_check_decl "$LINENO" "strnlen" "ac_cv_have_decl_strnlen" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_strnlen" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_STRNLEN $ac_have_decl" >>confdefs.h
+
+
+
+
+  if test $REPLACE_MEMCHR = 1; then
+    REPLACE_STRSTR=1
+  else
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether strstr works" >&5
+printf %s "checking whether strstr works... " >&6; }
+if test ${gl_cv_func_strstr_works_always+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+                                                    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <string.h> /* for __GNU_LIBRARY__ */
+#ifdef __GNU_LIBRARY__
+ #include <features.h>
+ #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ > 12) || (__GLIBC__ > 2)) \
+     || defined __UCLIBC__
+  Lucky user
+ #endif
+#elif defined __CYGWIN__
+ #include <cygwin/version.h>
+ #if CYGWIN_VERSION_DLL_COMBINED > CYGWIN_VERSION_DLL_MAKE_COMBINED (1007, 7)
+  Lucky user
+ #endif
+#else
+  Lucky user
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Lucky user" >/dev/null 2>&1
+then :
+  gl_cv_func_strstr_works_always="guessing yes"
+else $as_nop
+  gl_cv_func_strstr_works_always="$gl_cross_guess_normal"
+fi
+rm -rf conftest*
+
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <string.h> /* for __GNU_LIBRARY__, strstr */
+#ifdef __GNU_LIBRARY__
+ #include <features.h>
+ #if __GLIBC__ == 2 && __GLIBC_MINOR__ == 28
+  Unlucky user
+ #endif
+#endif
+#define P "_EF_BF_BD"
+#define HAYSTACK "F_BD_CE_BD" P P P P "_C3_88_20" P P P "_C3_A7_20" P
+#define NEEDLE P P P P P
+
+int
+main (void)
+{
+return !!strstr (HAYSTACK, NEEDLE);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_strstr_works_always=yes
+else $as_nop
+  gl_cv_func_strstr_works_always=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_strstr_works_always" >&5
+printf "%s\n" "$gl_cv_func_strstr_works_always" >&6; }
+    case "$gl_cv_func_strstr_works_always" in
+      *yes) ;;
+      *)
+        REPLACE_STRSTR=1
+        ;;
+    esac
+  fi
+
+
+ac_fn_check_decl "$LINENO" "strtoimax" "ac_cv_have_decl_strtoimax" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_strtoimax" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_STRTOIMAX $ac_have_decl" >>confdefs.h
+
+
+ac_fn_check_decl "$LINENO" "strtoumax" "ac_cv_have_decl_strtoumax" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_strtoumax" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_STRTOUMAX $ac_have_decl" >>confdefs.h
+
+
+
+
+    HAVE_DECL_LOCALTIME_R=1;
+  HAVE_NANOSLEEP=1;
+  HAVE_STRPTIME=1;
+  HAVE_TIMEGM=1;
+  HAVE_TIMESPEC_GET=1;
+    HAVE_TIMEZONE_T=0;
+        REPLACE_CTIME=GNULIB_PORTCHECK;
+  REPLACE_LOCALTIME_R=GNULIB_PORTCHECK;
+  REPLACE_MKTIME=GNULIB_PORTCHECK;
+  REPLACE_NANOSLEEP=GNULIB_PORTCHECK;
+  REPLACE_STRFTIME=GNULIB_PORTCHECK;
+  REPLACE_TIMEGM=GNULIB_PORTCHECK;
+  REPLACE_TZSET=GNULIB_PORTCHECK;
+
+      : ${GNULIB_GETTIMEOFDAY=0};
+        REPLACE_GMTIME=0;
+  REPLACE_LOCALTIME=0;
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for struct timespec in <time.h>" >&5
+printf %s "checking for struct timespec in <time.h>... " >&6; }
+if test ${gl_cv_sys_struct_timespec_in_time_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <time.h>
+
+int
+main (void)
+{
+static struct timespec x; x.tv_sec = x.tv_nsec;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_sys_struct_timespec_in_time_h=yes
+else $as_nop
+  gl_cv_sys_struct_timespec_in_time_h=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_sys_struct_timespec_in_time_h" >&5
+printf "%s\n" "$gl_cv_sys_struct_timespec_in_time_h" >&6; }
+
+  TIME_H_DEFINES_STRUCT_TIMESPEC=0
+  SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=0
+  PTHREAD_H_DEFINES_STRUCT_TIMESPEC=0
+  UNISTD_H_DEFINES_STRUCT_TIMESPEC=0
+  if test $gl_cv_sys_struct_timespec_in_time_h = yes; then
+    TIME_H_DEFINES_STRUCT_TIMESPEC=1
+  else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for struct timespec in <sys/time.h>" >&5
+printf %s "checking for struct timespec in <sys/time.h>... " >&6; }
+if test ${gl_cv_sys_struct_timespec_in_sys_time_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/time.h>
+
+int
+main (void)
+{
+static struct timespec x; x.tv_sec = x.tv_nsec;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_sys_struct_timespec_in_sys_time_h=yes
+else $as_nop
+  gl_cv_sys_struct_timespec_in_sys_time_h=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_sys_struct_timespec_in_sys_time_h" >&5
+printf "%s\n" "$gl_cv_sys_struct_timespec_in_sys_time_h" >&6; }
+    if test $gl_cv_sys_struct_timespec_in_sys_time_h = yes; then
+      SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=1
+    else
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for struct timespec in <pthread.h>" >&5
+printf %s "checking for struct timespec in <pthread.h>... " >&6; }
+if test ${gl_cv_sys_struct_timespec_in_pthread_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pthread.h>
+
+int
+main (void)
+{
+static struct timespec x; x.tv_sec = x.tv_nsec;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_sys_struct_timespec_in_pthread_h=yes
+else $as_nop
+  gl_cv_sys_struct_timespec_in_pthread_h=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_sys_struct_timespec_in_pthread_h" >&5
+printf "%s\n" "$gl_cv_sys_struct_timespec_in_pthread_h" >&6; }
+      if test $gl_cv_sys_struct_timespec_in_pthread_h = yes; then
+        PTHREAD_H_DEFINES_STRUCT_TIMESPEC=1
+      else
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for struct timespec in <unistd.h>" >&5
+printf %s "checking for struct timespec in <unistd.h>... " >&6; }
+if test ${gl_cv_sys_struct_timespec_in_unistd_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <unistd.h>
+
+int
+main (void)
+{
+static struct timespec x; x.tv_sec = x.tv_nsec;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_sys_struct_timespec_in_unistd_h=yes
+else $as_nop
+  gl_cv_sys_struct_timespec_in_unistd_h=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_sys_struct_timespec_in_unistd_h" >&5
+printf "%s\n" "$gl_cv_sys_struct_timespec_in_unistd_h" >&6; }
+        if test $gl_cv_sys_struct_timespec_in_unistd_h = yes; then
+          UNISTD_H_DEFINES_STRUCT_TIMESPEC=1
+        fi
+      fi
+    fi
+  fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_time_h='<'time.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <time.h>" >&5
+printf %s "checking absolute name of <time.h>... " >&6; }
+if test ${gl_cv_next_time_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <time.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'time.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_time_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_time_h
+           gl_cv_next_time_h='"'$gl_header'"'
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_time_h" >&5
+printf "%s\n" "$gl_cv_next_time_h" >&6; }
+     fi
+     NEXT_TIME_H=$gl_cv_next_time_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'time.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_time_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_TIME_H=$gl_next_as_first_directive
+
+
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for TIME_UTC in <time.h>" >&5
+printf %s "checking for TIME_UTC in <time.h>... " >&6; }
+if test ${gl_cv_time_h_has_TIME_UTC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <time.h>
+
+int
+main (void)
+{
+static int x = TIME_UTC; x++;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_time_h_has_TIME_UTC=yes
+else $as_nop
+  gl_cv_time_h_has_TIME_UTC=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_time_h_has_TIME_UTC" >&5
+printf "%s\n" "$gl_cv_time_h_has_TIME_UTC" >&6; }
+  if test $gl_cv_time_h_has_TIME_UTC = yes; then
+    TIME_H_DEFINES_TIME_UTC=1
+  else
+    TIME_H_DEFINES_TIME_UTC=0
+  fi
+
+
+
+
+  GL_GNULIB_CTIME=0
+
+
+
+  GL_GNULIB_MKTIME=0
+
+
+
+  GL_GNULIB_LOCALTIME=0
+
+
+
+  GL_GNULIB_NANOSLEEP=0
+
+
+
+  GL_GNULIB_STRFTIME=0
+
+
+
+  GL_GNULIB_STRPTIME=0
+
+
+
+  GL_GNULIB_TIMEGM=0
+
+
+
+  GL_GNULIB_TIMESPEC_GET=0
+
+
+
+  GL_GNULIB_TIME_R=0
+
+
+
+  GL_GNULIB_TIME_RZ=0
+
+
+
+  GL_GNULIB_TZSET=0
+
+
+
+  GL_GNULIB_MDA_TZSET=1
+
+
+
+ac_fn_check_decl "$LINENO" "execvpe" "ac_cv_have_decl_execvpe" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_execvpe" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_EXECVPE $ac_have_decl" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_unistd_h='<'unistd.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <unistd.h>" >&5
+printf %s "checking absolute name of <unistd.h>... " >&6; }
+if test ${gl_cv_next_unistd_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_unistd_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <unistd.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'unistd.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_unistd_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_unistd_h
+           gl_cv_next_unistd_h='"'$gl_header'"'
+          else
+               gl_cv_next_unistd_h='<'unistd.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_unistd_h" >&5
+printf "%s\n" "$gl_cv_next_unistd_h" >&6; }
+     fi
+     NEXT_UNISTD_H=$gl_cv_next_unistd_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'unistd.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_unistd_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_UNISTD_H=$gl_next_as_first_directive
+
+
+
+
+  if test $ac_cv_header_unistd_h = yes; then
+    HAVE_UNISTD_H=1
+  else
+    HAVE_UNISTD_H=0
+  fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+  if test $ac_cv_have_decl_execvpe = no; then
+    HAVE_DECL_EXECVPE=0
+  fi
+
+
+
+
+
+
+
+gl_libunistring_sed_extract_major='/^[0-9]/{s/^\([0-9]*\).*/\1/p;q;}
+i\
+0
+q
+'
+gl_libunistring_sed_extract_minor='/^[0-9][0-9]*[.][0-9]/{s/^[0-9]*[.]\([0-9]*\).*/\1/p;q;}
+i\
+0
+q
+'
+gl_libunistring_sed_extract_subminor='/^[0-9][0-9]*[.][0-9][0-9]*[.][0-9]/{s/^[0-9]*[.][0-9]*[.]\([0-9]*\).*/\1/p;q;}
+i\
+0
+q
+'
+
+
+  if test "$HAVE_LIBUNISTRING" = yes; then
+    LIBUNISTRING_VERSION_MAJOR=`echo "$LIBUNISTRING_VERSION" | sed -n -e "$gl_libunistring_sed_extract_major"`
+    LIBUNISTRING_VERSION_MINOR=`echo "$LIBUNISTRING_VERSION" | sed -n -e "$gl_libunistring_sed_extract_minor"`
+    LIBUNISTRING_VERSION_SUBMINOR=`echo "$LIBUNISTRING_VERSION" | sed -n -e "$gl_libunistring_sed_extract_subminor"`
+  fi
+
+ac_fn_check_decl "$LINENO" "clearerr_unlocked" "ac_cv_have_decl_clearerr_unlocked" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_clearerr_unlocked" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_CLEARERR_UNLOCKED $ac_have_decl" >>confdefs.h
+
+ac_fn_check_decl "$LINENO" "feof_unlocked" "ac_cv_have_decl_feof_unlocked" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_feof_unlocked" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_FEOF_UNLOCKED $ac_have_decl" >>confdefs.h
+
+ac_fn_check_decl "$LINENO" "ferror_unlocked" "ac_cv_have_decl_ferror_unlocked" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_ferror_unlocked" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_FERROR_UNLOCKED $ac_have_decl" >>confdefs.h
+
+ac_fn_check_decl "$LINENO" "fflush_unlocked" "ac_cv_have_decl_fflush_unlocked" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_fflush_unlocked" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_FFLUSH_UNLOCKED $ac_have_decl" >>confdefs.h
+
+ac_fn_check_decl "$LINENO" "fgets_unlocked" "ac_cv_have_decl_fgets_unlocked" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_fgets_unlocked" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_FGETS_UNLOCKED $ac_have_decl" >>confdefs.h
+
+ac_fn_check_decl "$LINENO" "fputc_unlocked" "ac_cv_have_decl_fputc_unlocked" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_fputc_unlocked" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_FPUTC_UNLOCKED $ac_have_decl" >>confdefs.h
+
+ac_fn_check_decl "$LINENO" "fputs_unlocked" "ac_cv_have_decl_fputs_unlocked" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_fputs_unlocked" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_FPUTS_UNLOCKED $ac_have_decl" >>confdefs.h
+
+ac_fn_check_decl "$LINENO" "fread_unlocked" "ac_cv_have_decl_fread_unlocked" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_fread_unlocked" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_FREAD_UNLOCKED $ac_have_decl" >>confdefs.h
+
+ac_fn_check_decl "$LINENO" "fwrite_unlocked" "ac_cv_have_decl_fwrite_unlocked" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_fwrite_unlocked" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_FWRITE_UNLOCKED $ac_have_decl" >>confdefs.h
+
+ac_fn_check_decl "$LINENO" "getc_unlocked" "ac_cv_have_decl_getc_unlocked" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_getc_unlocked" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_GETC_UNLOCKED $ac_have_decl" >>confdefs.h
+
+ac_fn_check_decl "$LINENO" "getchar_unlocked" "ac_cv_have_decl_getchar_unlocked" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_getchar_unlocked" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_GETCHAR_UNLOCKED $ac_have_decl" >>confdefs.h
+
+ac_fn_check_decl "$LINENO" "putc_unlocked" "ac_cv_have_decl_putc_unlocked" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_putc_unlocked" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_PUTC_UNLOCKED $ac_have_decl" >>confdefs.h
+
+ac_fn_check_decl "$LINENO" "putchar_unlocked" "ac_cv_have_decl_putchar_unlocked" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_putchar_unlocked" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_PUTCHAR_UNLOCKED $ac_have_decl" >>confdefs.h
+
+
+
+
+  if test $ac_cv_header_features_h = yes; then
+    HAVE_FEATURES_H=1
+  else
+    HAVE_FEATURES_H=0
+  fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_wchar_h='<'wchar.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <wchar.h>" >&5
+printf %s "checking absolute name of <wchar.h>... " >&6; }
+if test ${gl_cv_next_wchar_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_wchar_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <wchar.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'wchar.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_wchar_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_wchar_h
+           gl_cv_next_wchar_h='"'$gl_header'"'
+          else
+               gl_cv_next_wchar_h='<'wchar.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_wchar_h" >&5
+printf "%s\n" "$gl_cv_next_wchar_h" >&6; }
+     fi
+     NEXT_WCHAR_H=$gl_cv_next_wchar_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'wchar.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_wchar_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_WCHAR_H=$gl_next_as_first_directive
+
+
+
+
+  if test $ac_cv_header_wchar_h = yes; then
+    HAVE_WCHAR_H=1
+  else
+    HAVE_WCHAR_H=0
+  fi
+
+
+
+
+
+  if test $gt_cv_c_wint_t = yes; then
+    HAVE_WINT_T=1
+  else
+    HAVE_WINT_T=0
+  fi
+
+
+
+
+
+
+
+
+
+
+  ac_fn_check_decl "$LINENO" "wcsdup" "ac_cv_have_decl_wcsdup" "
+      #include <wchar.h>
+
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_wcsdup" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_WCSDUP $ac_have_decl" >>confdefs.h
+
+  if test $ac_cv_have_decl_wcsdup = no; then
+    HAVE_DECL_WCSDUP=0
+  fi
+
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler option to allow warnings" >&5
+printf %s "checking for C compiler option to allow warnings... " >&6; }
+if test ${gl_cv_cc_wallow+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  rm -f conftest*
+     echo 'int dummy;' > conftest.c
+     { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c 2>conftest1.err'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; } >/dev/null
+     { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -Wno-error -c conftest.c 2>conftest2.err'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; } >/dev/null
+                         if test $? = 0 && test `wc -l < conftest1.err` = `wc -l < conftest2.err`; then
+       gl_cv_cc_wallow='-Wno-error'
+     else
+       gl_cv_cc_wallow=none
+     fi
+     rm -f conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_cc_wallow" >&5
+printf "%s\n" "$gl_cv_cc_wallow" >&6; }
+  case "$gl_cv_cc_wallow" in
+    none) GL_CFLAG_ALLOW_WARNINGS='' ;;
+    *)    GL_CFLAG_ALLOW_WARNINGS="$gl_cv_cc_wallow" ;;
+  esac
+
+
+
+    if test -n "$CXX" && test "$CXX" != no; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C++ compiler option to allow warnings" >&5
+printf %s "checking for C++ compiler option to allow warnings... " >&6; }
+if test ${gl_cv_cxx_wallow+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  rm -f conftest*
+       echo 'int dummy;' > conftest.cc
+       { ac_try='${CXX-c++} $CXXFLAGS $CPPFLAGS -c conftest.cc 2>conftest1.err'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; } >/dev/null
+       { ac_try='${CXX-c++} $CXXFLAGS $CPPFLAGS -Wno-error -c conftest.cc 2>conftest2.err'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; } >/dev/null
+                                   if test $? = 0 && test `wc -l < conftest1.err` = `wc -l < conftest2.err`; then
+         gl_cv_cxx_wallow='-Wno-error'
+       else
+         gl_cv_cxx_wallow=none
+       fi
+       rm -f conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_cxx_wallow" >&5
+printf "%s\n" "$gl_cv_cxx_wallow" >&6; }
+    case "$gl_cv_cxx_wallow" in
+      none) GL_CXXFLAG_ALLOW_WARNINGS='' ;;
+      *)    GL_CXXFLAG_ALLOW_WARNINGS="$gl_cv_cxx_wallow" ;;
+    esac
+  else
+    GL_CXXFLAG_ALLOW_WARNINGS=''
+  fi
+
+
+
+  HAVE_STRUCT_SOCKADDR_STORAGE=1;
+  HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=1;
+
+  HAVE_SA_FAMILY_T=1;
+  HAVE_ACCEPT4=1;
+
+
+   if test $ac_cv_header_sys_socket_h = no; then
+                         ac_fn_c_check_header_compile "$LINENO" "ws2tcpip.h" "ac_cv_header_ws2tcpip_h" "$ac_includes_default"
+if test "x$ac_cv_header_ws2tcpip_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_WS2TCPIP_H 1" >>confdefs.h
+
+fi
+
+   fi
+
+
+
+
+
+        case "$host_os" in
+    osf*)
+
+printf "%s\n" "#define _POSIX_PII_SOCKET 1" >>confdefs.h
+
+      ;;
+  esac
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether <sys/socket.h> is self-contained" >&5
+printf %s "checking whether <sys/socket.h> is self-contained... " >&6; }
+if test ${gl_cv_header_sys_socket_h_selfcontained+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/socket.h>
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_sys_socket_h_selfcontained=yes
+else $as_nop
+  gl_cv_header_sys_socket_h_selfcontained=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_sys_socket_h_selfcontained" >&5
+printf "%s\n" "$gl_cv_header_sys_socket_h_selfcontained" >&6; }
+  if test $gl_cv_header_sys_socket_h_selfcontained = yes; then
+            ac_fn_c_check_func "$LINENO" "shutdown" "ac_cv_func_shutdown"
+if test "x$ac_cv_func_shutdown" = xyes
+then :
+  printf "%s\n" "#define HAVE_SHUTDOWN 1" >>confdefs.h
+
+fi
+
+    if test $ac_cv_func_shutdown = yes; then
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether <sys/socket.h> defines the SHUT_* macros" >&5
+printf %s "checking whether <sys/socket.h> defines the SHUT_* macros... " >&6; }
+if test ${gl_cv_header_sys_socket_h_shut+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/socket.h>
+int
+main (void)
+{
+int a[] = { SHUT_RD, SHUT_WR, SHUT_RDWR };
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_sys_socket_h_shut=yes
+else $as_nop
+  gl_cv_header_sys_socket_h_shut=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_sys_socket_h_shut" >&5
+printf "%s\n" "$gl_cv_header_sys_socket_h_shut" >&6; }
+      if test $gl_cv_header_sys_socket_h_shut = no; then
+        SYS_SOCKET_H='sys/socket.h'
+      fi
+    fi
+  fi
+  # We need to check for ws2tcpip.h now.
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_sys_socket_h='<'sys/socket.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <sys/socket.h>" >&5
+printf %s "checking absolute name of <sys/socket.h>... " >&6; }
+if test ${gl_cv_next_sys_socket_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_sys_socket_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/socket.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'sys/socket.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_sys_socket_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_sys_socket_h
+           gl_cv_next_sys_socket_h='"'$gl_header'"'
+          else
+               gl_cv_next_sys_socket_h='<'sys/socket.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_sys_socket_h" >&5
+printf "%s\n" "$gl_cv_next_sys_socket_h" >&6; }
+     fi
+     NEXT_SYS_SOCKET_H=$gl_cv_next_sys_socket_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'sys/socket.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_sys_socket_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H=$gl_next_as_first_directive
+
+
+
+
+  if test $ac_cv_header_sys_socket_h = yes; then
+    HAVE_SYS_SOCKET_H=1
+  else
+    HAVE_SYS_SOCKET_H=0
+  fi
+
+
+
+  if test $ac_cv_header_sys_socket_h = yes; then
+    HAVE_WS2TCPIP_H=0
+  else
+    if test $ac_cv_header_ws2tcpip_h = yes; then
+      HAVE_WS2TCPIP_H=1
+    else
+      HAVE_WS2TCPIP_H=0
+    fi
+  fi
+
+
+
+  ac_fn_c_check_type "$LINENO" "struct sockaddr_storage" "ac_cv_type_struct_sockaddr_storage" "
+  /* sys/types.h is not needed according to POSIX, but the
+     sys/socket.h in i386-unknown-freebsd4.10 and
+     powerpc-apple-darwin5.5 required it. */
+#include <sys/types.h>
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_WS2TCPIP_H
+#include <ws2tcpip.h>
+#endif
+
+"
+if test "x$ac_cv_type_struct_sockaddr_storage" = xyes
+then :
+
+printf "%s\n" "#define HAVE_STRUCT_SOCKADDR_STORAGE 1" >>confdefs.h
+
+
+fi
+ac_fn_c_check_type "$LINENO" "sa_family_t" "ac_cv_type_sa_family_t" "
+  /* sys/types.h is not needed according to POSIX, but the
+     sys/socket.h in i386-unknown-freebsd4.10 and
+     powerpc-apple-darwin5.5 required it. */
+#include <sys/types.h>
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_WS2TCPIP_H
+#include <ws2tcpip.h>
+#endif
+
+"
+if test "x$ac_cv_type_sa_family_t" = xyes
+then :
+
+printf "%s\n" "#define HAVE_SA_FAMILY_T 1" >>confdefs.h
+
+
+fi
+
+  if test $ac_cv_type_struct_sockaddr_storage = no; then
+    HAVE_STRUCT_SOCKADDR_STORAGE=0
+  fi
+  if test $ac_cv_type_sa_family_t = no; then
+    HAVE_SA_FAMILY_T=0
+  fi
+  if test $ac_cv_type_struct_sockaddr_storage != no; then
+    ac_fn_c_check_member "$LINENO" "struct sockaddr_storage" "ss_family" "ac_cv_member_struct_sockaddr_storage_ss_family" "#include <sys/types.h>
+       #ifdef HAVE_SYS_SOCKET_H
+       #include <sys/socket.h>
+       #endif
+       #ifdef HAVE_WS2TCPIP_H
+       #include <ws2tcpip.h>
+       #endif
+
+"
+if test "x$ac_cv_member_struct_sockaddr_storage_ss_family" = xyes
+then :
+
+printf "%s\n" "#define HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY 1" >>confdefs.h
+
+
+else $as_nop
+  HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=0
+fi
+
+  fi
+  if test $HAVE_STRUCT_SOCKADDR_STORAGE = 0 || test $HAVE_SA_FAMILY_T = 0 \
+     || test $HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY = 0; then
+    SYS_SOCKET_H='sys/socket.h'
+  fi
+
+
+
+
+  if test $ac_cv_header_sys_socket_h != yes; then
+                    ac_fn_c_check_header_compile "$LINENO" "winsock2.h" "ac_cv_header_winsock2_h" "$ac_includes_default"
+if test "x$ac_cv_header_winsock2_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_WINSOCK2_H 1" >>confdefs.h
+
+fi
+
+  fi
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    HAVE_WINSOCK2_H=1
+    UNISTD_H_HAVE_WINSOCK2_H=1
+    SYS_IOCTL_H_HAVE_WINSOCK2_H=1
+  else
+    HAVE_WINSOCK2_H=0
+  fi
+
+
+
+
+
+
+
+
+
+
+
+  GL_GNULIB_SOCKET=0
+
+
+
+  GL_GNULIB_CONNECT=0
+
+
+
+  GL_GNULIB_ACCEPT=0
+
+
+
+  GL_GNULIB_BIND=0
+
+
+
+  GL_GNULIB_GETPEERNAME=0
+
+
+
+  GL_GNULIB_GETSOCKNAME=0
+
+
+
+  GL_GNULIB_GETSOCKOPT=0
+
+
+
+  GL_GNULIB_LISTEN=0
+
+
+
+  GL_GNULIB_RECV=0
+
+
+
+  GL_GNULIB_SEND=0
+
+
+
+  GL_GNULIB_RECVFROM=0
+
+
+
+  GL_GNULIB_SENDTO=0
+
+
+
+  GL_GNULIB_SETSOCKOPT=0
+
+
+
+  GL_GNULIB_SHUTDOWN=0
+
+
+
+  GL_GNULIB_ACCEPT4=0
+
+
+
+
+    HAVE_DECL_INET_NTOP=1;
+  HAVE_DECL_INET_PTON=1;
+  REPLACE_INET_NTOP=0;
+  REPLACE_INET_PTON=0;
+
+
+
+
+
+
+  if test $ac_cv_header_arpa_inet_h = yes; then
+    HAVE_ARPA_INET_H=1
+  else
+    HAVE_ARPA_INET_H=0
+  fi
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_arpa_inet_h='<'arpa/inet.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <arpa/inet.h>" >&5
+printf %s "checking absolute name of <arpa/inet.h>... " >&6; }
+if test ${gl_cv_next_arpa_inet_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_arpa_inet_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <arpa/inet.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'arpa/inet.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_arpa_inet_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_arpa_inet_h
+           gl_cv_next_arpa_inet_h='"'$gl_header'"'
+          else
+               gl_cv_next_arpa_inet_h='<'arpa/inet.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_arpa_inet_h" >&5
+printf "%s\n" "$gl_cv_next_arpa_inet_h" >&6; }
+     fi
+     NEXT_ARPA_INET_H=$gl_cv_next_arpa_inet_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'arpa/inet.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_arpa_inet_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_ARPA_INET_H=$gl_next_as_first_directive
+
+
+
+
+
+
+
+
+
+  if test $ac_cv_header_sys_socket_h = yes; then
+    HAVE_WS2TCPIP_H=0
+  else
+    if test $ac_cv_header_ws2tcpip_h = yes; then
+      HAVE_WS2TCPIP_H=1
+    else
+      HAVE_WS2TCPIP_H=0
+    fi
+  fi
+
+
+
+
+
+
+
+
+
+  GL_GNULIB_INET_NTOP=0
+
+
+
+  GL_GNULIB_INET_PTON=0
+
+
+
+
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if environ is properly declared" >&5
+printf %s "checking if environ is properly declared... " >&6; }
+if test ${gt_cv_var_environ_declaration+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if HAVE_UNISTD_H
+     #include <unistd.h>
+     #endif
+     /* mingw, BeOS, Haiku declare environ in <stdlib.h>, not in <unistd.h>.  */
+     #include <stdlib.h>
+
+            typedef struct { int foo; } foo_t;
+            extern foo_t environ;
+int
+main (void)
+{
+environ.foo = 1;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gt_cv_var_environ_declaration=no
+else $as_nop
+  gt_cv_var_environ_declaration=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_var_environ_declaration" >&5
+printf "%s\n" "$gt_cv_var_environ_declaration" >&6; }
+  if test $gt_cv_var_environ_declaration = yes; then
+
+printf "%s\n" "#define HAVE_ENVIRON_DECL 1" >>confdefs.h
+
+  fi
+
+
+  if test $gt_cv_var_environ_declaration != yes; then
+    HAVE_DECL_ENVIRON=0
+  fi
+
+
+
+    HAVE_GETTIMEOFDAY=1;
+  HAVE_STRUCT_TIMEVAL=1;
+  HAVE_SYS_TIME_H=1;
+  REPLACE_GETTIMEOFDAY=0;
+  REPLACE_STRUCT_TIMEVAL=0;
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_sys_time_h='<'sys/time.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <sys/time.h>" >&5
+printf %s "checking absolute name of <sys/time.h>... " >&6; }
+if test ${gl_cv_next_sys_time_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_sys_time_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/time.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'sys/time.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_sys_time_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_sys_time_h
+           gl_cv_next_sys_time_h='"'$gl_header'"'
+          else
+               gl_cv_next_sys_time_h='<'sys/time.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_sys_time_h" >&5
+printf "%s\n" "$gl_cv_next_sys_time_h" >&6; }
+     fi
+     NEXT_SYS_TIME_H=$gl_cv_next_sys_time_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'sys/time.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_sys_time_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H=$gl_next_as_first_directive
+
+
+
+
+
+  if test $ac_cv_header_sys_time_h != yes; then
+    HAVE_SYS_TIME_H=0
+  fi
+
+
+
+
+
+  if test $ac_cv_header_sys_socket_h != yes; then
+                    ac_fn_c_check_header_compile "$LINENO" "winsock2.h" "ac_cv_header_winsock2_h" "$ac_includes_default"
+if test "x$ac_cv_header_winsock2_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_WINSOCK2_H 1" >>confdefs.h
+
+fi
+
+  fi
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    HAVE_WINSOCK2_H=1
+    UNISTD_H_HAVE_WINSOCK2_H=1
+    SYS_IOCTL_H_HAVE_WINSOCK2_H=1
+  else
+    HAVE_WINSOCK2_H=0
+  fi
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for struct timeval" >&5
+printf %s "checking for struct timeval... " >&6; }
+if test ${gl_cv_sys_struct_timeval+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if HAVE_SYS_TIME_H
+             #include <sys/time.h>
+            #endif
+            #include <time.h>
+            #if HAVE_WINSOCK2_H
+            # include <winsock2.h>
+            #endif
+
+int
+main (void)
+{
+static struct timeval x; x.tv_sec = x.tv_usec;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_sys_struct_timeval=yes
+else $as_nop
+  gl_cv_sys_struct_timeval=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_sys_struct_timeval" >&5
+printf "%s\n" "$gl_cv_sys_struct_timeval" >&6; }
+  if test $gl_cv_sys_struct_timeval != yes; then
+    HAVE_STRUCT_TIMEVAL=0
+  else
+                            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for wide-enough struct timeval.tv_sec member" >&5
+printf %s "checking for wide-enough struct timeval.tv_sec member... " >&6; }
+if test ${gl_cv_sys_struct_timeval_tv_sec+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if HAVE_SYS_TIME_H
+               #include <sys/time.h>
+              #endif
+              #include <time.h>
+              #if HAVE_WINSOCK2_H
+              # include <winsock2.h>
+              #endif
+
+int
+main (void)
+{
+static struct timeval x;
+              typedef int verify_tv_sec_type[
+                sizeof (time_t) <= sizeof x.tv_sec ? 1 : -1
+              ];
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_sys_struct_timeval_tv_sec=yes
+else $as_nop
+  gl_cv_sys_struct_timeval_tv_sec=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_sys_struct_timeval_tv_sec" >&5
+printf "%s\n" "$gl_cv_sys_struct_timeval_tv_sec" >&6; }
+    if test $gl_cv_sys_struct_timeval_tv_sec != yes; then
+      REPLACE_STRUCT_TIMEVAL=1
+    fi
+  fi
+
+
+
+
+
+
+
+
+  GL_GNULIB_GETTIMEOFDAY=0
+
+
+
+
+
+  case "$host_os" in
+    *-musl*)
+printf "%s\n" "#define MUSL_LIBC 1" >>confdefs.h
+ ;;
+  esac
+
+
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for IPv4 sockets" >&5
+printf %s "checking for IPv4 sockets... " >&6; }
+if test ${gl_cv_socket_ipv4+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h>
+#endif
+int
+main (void)
+{
+int x = AF_INET; struct in_addr y; struct sockaddr_in z;
+ if (&x && &y && &z) return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_socket_ipv4=yes
+else $as_nop
+  gl_cv_socket_ipv4=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_socket_ipv4" >&5
+printf "%s\n" "$gl_cv_socket_ipv4" >&6; }
+  if test $gl_cv_socket_ipv4 = yes; then
+
+printf "%s\n" "#define HAVE_IPV4 1" >>confdefs.h
+
+  fi
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for IPv6 sockets" >&5
+printf %s "checking for IPv6 sockets... " >&6; }
+if test ${gl_cv_socket_ipv6+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h>
+#endif
+#ifdef HAVE_WS2TCPIP_H
+#include <ws2tcpip.h>
+#endif
+int
+main (void)
+{
+int x = AF_INET6; struct in6_addr y; struct sockaddr_in6 z;
+ if (&x && &y && &z) return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_socket_ipv6=yes
+else $as_nop
+  gl_cv_socket_ipv6=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_socket_ipv6" >&5
+printf "%s\n" "$gl_cv_socket_ipv6" >&6; }
+  if test $gl_cv_socket_ipv6 = yes; then
+
+printf "%s\n" "#define HAVE_IPV6 1" >>confdefs.h
+
+  fi
+
+ac_fn_c_check_type "$LINENO" "off_t" "ac_cv_type_off_t" "$ac_includes_default"
+if test "x$ac_cv_type_off_t" = xyes
+then :
+
+else $as_nop
+
+printf "%s\n" "#define off_t long int" >>confdefs.h
+
+fi
+
+
+
+  GL_GNULIB_IOCTL=0
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for LC_MESSAGES" >&5
+printf %s "checking for LC_MESSAGES... " >&6; }
+if test ${gt_cv_val_LC_MESSAGES+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <locale.h>
+int
+main (void)
+{
+return LC_MESSAGES
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gt_cv_val_LC_MESSAGES=yes
+else $as_nop
+  gt_cv_val_LC_MESSAGES=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_val_LC_MESSAGES" >&5
+printf "%s\n" "$gt_cv_val_LC_MESSAGES" >&6; }
+  if test $gt_cv_val_LC_MESSAGES = yes; then
+
+printf "%s\n" "#define HAVE_LC_MESSAGES 1" >>confdefs.h
+
+  fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+          if test $ac_cv_func_uselocale = yes; then
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether uselocale works" >&5
+printf %s "checking whether uselocale works... " >&6; }
+if test ${gt_cv_func_uselocale_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  # Guess no on AIX and z/OS, yes otherwise.
+          case "$host_os" in
+            aix* | openedition*) gt_cv_func_uselocale_works="guessing no" ;;
+            *)                   gt_cv_func_uselocale_works="guessing yes" ;;
+          esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#if HAVE_XLOCALE_H
+# include <xlocale.h>
+#endif
+locale_t loc1;
+int main ()
+{
+  uselocale (NULL);
+  setlocale (LC_ALL, "en_US.UTF-8");
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gt_cv_func_uselocale_works=yes
+else $as_nop
+  gt_cv_func_uselocale_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_func_uselocale_works" >&5
+printf "%s\n" "$gt_cv_func_uselocale_works" >&6; }
+  else
+    gt_cv_func_uselocale_works=no
+  fi
+  case "$gt_cv_func_uselocale_works" in
+    *yes)
+      gt_working_uselocale=yes
+
+printf "%s\n" "#define HAVE_WORKING_USELOCALE 1" >>confdefs.h
+
+      ;;
+    *)
+      gt_working_uselocale=no
+      ;;
+  esac
+
+
+                            case "$gt_cv_func_uselocale_works" in
+    *yes)
+
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for fake locale system (OpenBSD)" >&5
+printf %s "checking for fake locale system (OpenBSD)... " >&6; }
+if test ${gt_cv_locale_fake+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+              case "$host_os" in
+              openbsd*) gt_cv_locale_fake="guessing yes" ;;
+              *)        gt_cv_locale_fake="guessing no" ;;
+            esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#if HAVE_XLOCALE_H
+# include <xlocale.h>
+#endif
+int main ()
+{
+  locale_t loc1, loc2;
+  if (setlocale (LC_ALL, "de_DE.UTF-8") == NULL) return 1;
+  if (setlocale (LC_ALL, "fr_FR.UTF-8") == NULL) return 1;
+  loc1 = newlocale (LC_ALL_MASK, "de_DE.UTF-8", (locale_t)0);
+  loc2 = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", (locale_t)0);
+  return !(loc1 == loc2);
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gt_cv_locale_fake=yes
+else $as_nop
+  gt_cv_locale_fake=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fake" >&5
+printf "%s\n" "$gt_cv_locale_fake" >&6; }
+      ;;
+    *) gt_cv_locale_fake=no ;;
+  esac
+  case "$gt_cv_locale_fake" in
+    *yes)
+      gt_fake_locales=yes
+
+printf "%s\n" "#define HAVE_FAKE_LOCALES 1" >>confdefs.h
+
+      ;;
+    *)
+      gt_fake_locales=no
+      ;;
+  esac
+
+  case "$gt_cv_func_uselocale_works" in
+    *yes)
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for Solaris 11.4 locale system" >&5
+printf %s "checking for Solaris 11.4 locale system... " >&6; }
+if test ${gt_cv_locale_solaris114+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  case "$host_os" in
+           solaris*)
+                                                                                           cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+                  #include <locale.h>
+                  struct _LC_locale_t *x;
+                  locale_t y;
+
+int
+main (void)
+{
+*y = x;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gt_cv_locale_solaris114=yes
+else $as_nop
+  gt_cv_locale_solaris114=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+             ;;
+           *) gt_cv_locale_solaris114=no ;;
+         esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_solaris114" >&5
+printf "%s\n" "$gt_cv_locale_solaris114" >&6; }
+      ;;
+    *) gt_cv_locale_solaris114=no ;;
+  esac
+  if test $gt_cv_locale_solaris114 = yes; then
+
+printf "%s\n" "#define HAVE_SOLARIS114_LOCALES 1" >>confdefs.h
+
+  fi
+
+        case "$gt_cv_func_uselocale_works" in
+    *yes)
+      ac_fn_c_check_func "$LINENO" "getlocalename_l" "ac_cv_func_getlocalename_l"
+if test "x$ac_cv_func_getlocalename_l" = xyes
+then :
+  printf "%s\n" "#define HAVE_GETLOCALENAME_L 1" >>confdefs.h
+
+fi
+
+      ;;
+  esac
+
+            gt_nameless_locales=no
+  case "$host_os" in
+        aix*)
+      gt_nameless_locales=yes
+
+printf "%s\n" "#define HAVE_NAMELESS_LOCALES 1" >>confdefs.h
+
+      ;;
+  esac
+
+        if test $gt_working_uselocale = yes && test $gt_fake_locales = no; then
+    gt_good_uselocale=yes
+
+printf "%s\n" "#define HAVE_GOOD_USELOCALE 1" >>confdefs.h
+
+  else
+    gt_good_uselocale=no
+  fi
+
+        if test $gt_good_uselocale = yes && test $gt_nameless_locales = yes; then
+    gt_localename_enhances_locale_funcs=yes
+    LOCALENAME_ENHANCE_LOCALE_FUNCS=1
+
+printf "%s\n" "#define LOCALENAME_ENHANCE_LOCALE_FUNCS 1" >>confdefs.h
+
+  else
+    gt_localename_enhances_locale_funcs=no
+  fi
+
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for CFPreferencesCopyAppValue" >&5
+printf %s "checking for CFPreferencesCopyAppValue... " >&6; }
+if test ${gt_cv_func_CFPreferencesCopyAppValue+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gt_save_LIBS="$LIBS"
+     LIBS="$LIBS -Wl,-framework -Wl,CoreFoundation"
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <CoreFoundation/CFPreferences.h>
+int
+main (void)
+{
+CFPreferencesCopyAppValue(NULL, NULL)
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gt_cv_func_CFPreferencesCopyAppValue=yes
+else $as_nop
+  gt_cv_func_CFPreferencesCopyAppValue=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+     LIBS="$gt_save_LIBS"
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_func_CFPreferencesCopyAppValue" >&5
+printf "%s\n" "$gt_cv_func_CFPreferencesCopyAppValue" >&6; }
+  if test $gt_cv_func_CFPreferencesCopyAppValue = yes; then
+
+printf "%s\n" "#define HAVE_CFPREFERENCESCOPYAPPVALUE 1" >>confdefs.h
+
+  fi
+                    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for CFLocaleCopyPreferredLanguages" >&5
+printf %s "checking for CFLocaleCopyPreferredLanguages... " >&6; }
+if test ${gt_cv_func_CFLocaleCopyPreferredLanguages+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gt_save_LIBS="$LIBS"
+     LIBS="$LIBS -Wl,-framework -Wl,CoreFoundation"
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <CoreFoundation/CFLocale.h>
+int
+main (void)
+{
+CFLocaleCopyPreferredLanguages();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gt_cv_func_CFLocaleCopyPreferredLanguages=yes
+else $as_nop
+  gt_cv_func_CFLocaleCopyPreferredLanguages=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+     LIBS="$gt_save_LIBS"
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_func_CFLocaleCopyPreferredLanguages" >&5
+printf "%s\n" "$gt_cv_func_CFLocaleCopyPreferredLanguages" >&6; }
+  if test $gt_cv_func_CFLocaleCopyPreferredLanguages = yes; then
+
+printf "%s\n" "#define HAVE_CFLOCALECOPYPREFERREDLANGUAGES 1" >>confdefs.h
+
+  fi
+  INTL_MACOSX_LIBS=
+  if test $gt_cv_func_CFPreferencesCopyAppValue = yes \
+     || test $gt_cv_func_CFLocaleCopyPreferredLanguages = yes; then
+    INTL_MACOSX_LIBS="-Wl,-framework -Wl,CoreFoundation"
+  fi
+
+
+
+
+    HAVE_PSELECT=1;
+  REPLACE_PSELECT=0;
+  REPLACE_SELECT=0;
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether <sys/select.h> is self-contained" >&5
+printf %s "checking whether <sys/select.h> is self-contained... " >&6; }
+if test ${gl_cv_header_sys_select_h_selfcontained+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                                    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/select.h>
+int
+main (void)
+{
+struct timeval b;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_sys_select_h_selfcontained=yes
+else $as_nop
+  gl_cv_header_sys_select_h_selfcontained=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+                        if test $gl_cv_header_sys_select_h_selfcontained = yes; then
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/select.h>
+int
+main (void)
+{
+int memset; int bzero;
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/select.h>
+int
+main (void)
+{
+
+                  #undef memset
+                  #define memset nonexistent_memset
+                  extern
+                  #ifdef __cplusplus
+                  "C"
+                  #endif
+                  void *memset (void *, int, unsigned long);
+                  #undef bzero
+                  #define bzero nonexistent_bzero
+                  extern
+                  #ifdef __cplusplus
+                  "C"
+                  #endif
+                  void bzero (void *, unsigned long);
+                  fd_set fds;
+                  FD_ZERO (&fds);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+
+else $as_nop
+  gl_cv_header_sys_select_h_selfcontained=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_sys_select_h_selfcontained" >&5
+printf "%s\n" "$gl_cv_header_sys_select_h_selfcontained" >&6; }
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_sys_select_h='<'sys/select.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <sys/select.h>" >&5
+printf %s "checking absolute name of <sys/select.h>... " >&6; }
+if test ${gl_cv_next_sys_select_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_sys_select_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/select.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'sys/select.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_sys_select_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_sys_select_h
+           gl_cv_next_sys_select_h='"'$gl_header'"'
+          else
+               gl_cv_next_sys_select_h='<'sys/select.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_sys_select_h" >&5
+printf "%s\n" "$gl_cv_next_sys_select_h" >&6; }
+     fi
+     NEXT_SYS_SELECT_H=$gl_cv_next_sys_select_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'sys/select.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_sys_select_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H=$gl_next_as_first_directive
+
+
+
+
+  if test $ac_cv_header_sys_select_h = yes; then
+    HAVE_SYS_SELECT_H=1
+  else
+    HAVE_SYS_SELECT_H=0
+  fi
+
+
+
+
+
+  if test $ac_cv_header_sys_socket_h != yes; then
+                    ac_fn_c_check_header_compile "$LINENO" "winsock2.h" "ac_cv_header_winsock2_h" "$ac_includes_default"
+if test "x$ac_cv_header_winsock2_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_WINSOCK2_H 1" >>confdefs.h
+
+fi
+
+  fi
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    HAVE_WINSOCK2_H=1
+    UNISTD_H_HAVE_WINSOCK2_H=1
+    SYS_IOCTL_H_HAVE_WINSOCK2_H=1
+  else
+    HAVE_WINSOCK2_H=0
+  fi
+
+
+
+
+
+
+
+
+
+
+
+
+  if test $ac_cv_header_sys_socket_h != yes; then
+                    ac_fn_c_check_header_compile "$LINENO" "winsock2.h" "ac_cv_header_winsock2_h" "$ac_includes_default"
+if test "x$ac_cv_header_winsock2_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_WINSOCK2_H 1" >>confdefs.h
+
+fi
+
+  fi
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    HAVE_WINSOCK2_H=1
+    UNISTD_H_HAVE_WINSOCK2_H=1
+    SYS_IOCTL_H_HAVE_WINSOCK2_H=1
+  else
+    HAVE_WINSOCK2_H=0
+  fi
+
+   LIBSOCKET=
+  if test $HAVE_WINSOCK2_H = 1; then
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for WSAStartup" >&5
+printf %s "checking for WSAStartup... " >&6; }
+if test ${gl_cv_func_wsastartup+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+       gl_save_LIBS="$LIBS"
+       LIBS="$LIBS -lws2_32"
+       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#ifdef HAVE_WINSOCK2_H
+# include <winsock2.h>
+#endif
+int
+main (void)
+{
+
+            WORD wVersionRequested = MAKEWORD(1, 1);
+            WSADATA wsaData;
+            int err = WSAStartup(wVersionRequested, &wsaData);
+            WSACleanup ();
+
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_func_wsastartup=yes
+else $as_nop
+  gl_cv_func_wsastartup=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+       LIBS="$gl_save_LIBS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_wsastartup" >&5
+printf "%s\n" "$gl_cv_func_wsastartup" >&6; }
+    if test "$gl_cv_func_wsastartup" = "yes"; then
+
+printf "%s\n" "#define WINDOWS_SOCKETS 1" >>confdefs.h
+
+      LIBSOCKET='-lws2_32'
+    fi
+  else
+                                    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing setsockopt" >&5
+printf %s "checking for library containing setsockopt... " >&6; }
+if test ${gl_cv_lib_socket+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      gl_cv_lib_socket=
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+extern
+#ifdef __cplusplus
+"C"
+#endif
+char setsockopt();
+int
+main (void)
+{
+setsockopt();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+
+else $as_nop
+  gl_save_LIBS="$LIBS"
+         LIBS="$gl_save_LIBS -lsocket"
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+extern
+#ifdef __cplusplus
+"C"
+#endif
+char setsockopt();
+int
+main (void)
+{
+setsockopt();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_lib_socket="-lsocket"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+         if test -z "$gl_cv_lib_socket"; then
+           LIBS="$gl_save_LIBS -lnetwork"
+           cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+extern
+#ifdef __cplusplus
+"C"
+#endif
+char setsockopt();
+int
+main (void)
+{
+setsockopt();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_lib_socket="-lnetwork"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+           if test -z "$gl_cv_lib_socket"; then
+             LIBS="$gl_save_LIBS -lnet"
+             cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+extern
+#ifdef __cplusplus
+"C"
+#endif
+char setsockopt();
+int
+main (void)
+{
+setsockopt();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_lib_socket="-lnet"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+           fi
+         fi
+         LIBS="$gl_save_LIBS"
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+      if test -z "$gl_cv_lib_socket"; then
+        gl_cv_lib_socket="none needed"
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_lib_socket" >&5
+printf "%s\n" "$gl_cv_lib_socket" >&6; }
+    if test "$gl_cv_lib_socket" != "none needed"; then
+      LIBSOCKET="$gl_cv_lib_socket"
+    fi
+  fi
+
+
+
+
+
+
+  :
+
+
+
+
+
+
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    REPLACE_SELECT=1
+  else
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether select supports a 0 argument" >&5
+printf %s "checking whether select supports a 0 argument... " >&6; }
+if test ${gl_cv_func_select_supports0+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+        if test "$cross_compiling" = yes
+then :
+
+           case "$host_os" in
+                       # Guess no on Interix.
+             interix*) gl_cv_func_select_supports0="guessing no";;
+                       # Guess yes otherwise.
+             *)        gl_cv_func_select_supports0="guessing yes";;
+           esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#if HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+int main ()
+{
+  struct timeval timeout;
+  timeout.tv_sec = 0;
+  timeout.tv_usec = 5;
+  return select (0, (fd_set *)0, (fd_set *)0, (fd_set *)0, &timeout) < 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_select_supports0=yes
+else $as_nop
+  gl_cv_func_select_supports0=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_select_supports0" >&5
+printf "%s\n" "$gl_cv_func_select_supports0" >&6; }
+    case "$gl_cv_func_select_supports0" in
+      *yes) ;;
+      *) REPLACE_SELECT=1 ;;
+    esac
+
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether select detects invalid fds" >&5
+printf %s "checking whether select detects invalid fds... " >&6; }
+if test ${gl_cv_func_select_detects_ebadf+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+        if test "$cross_compiling" = yes
+then :
+
+           case "$host_os" in
+                             # Guess yes on Linux systems.
+            linux-* | linux) gl_cv_func_select_detects_ebadf="guessing yes" ;;
+                             # Guess yes on glibc systems.
+            *-gnu* | gnu*)   gl_cv_func_select_detects_ebadf="guessing yes" ;;
+                             # If we don't know, obey --enable-cross-guesses.
+            *)               gl_cv_func_select_detects_ebadf="$gl_cross_guess_normal" ;;
+           esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#if HAVE_SYS_SELECT_H
+# include <sys/select.h>
+#endif
+#include <unistd.h>
+#include <errno.h>
+
+
+$gl_mda_defines
+
+int
+main (void)
+{
+
+  fd_set set;
+  dup2(0, 16);
+  FD_ZERO(&set);
+  FD_SET(16, &set);
+  close(16);
+  struct timeval timeout;
+  timeout.tv_sec = 0;
+  timeout.tv_usec = 5;
+  return select (17, &set, NULL, NULL, &timeout) != -1 || errno != EBADF;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_select_detects_ebadf=yes
+else $as_nop
+  gl_cv_func_select_detects_ebadf=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_select_detects_ebadf" >&5
+printf "%s\n" "$gl_cv_func_select_detects_ebadf" >&6; }
+    case $gl_cv_func_select_detects_ebadf in
+      *yes) ;;
+      *) REPLACE_SELECT=1 ;;
+    esac
+  fi
+
+    LIB_SELECT="$LIBSOCKET"
+  if test $REPLACE_SELECT = 1; then
+    case "$host_os" in
+      mingw*)
+                                cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+int
+main ()
+{
+  MsgWaitForMultipleObjects (0, NULL, 0, 0, 0);
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+
+else $as_nop
+  LIB_SELECT="$LIB_SELECT -luser32"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+        ;;
+    esac
+  fi
+
+
+
+
+
+
+
+
+
+  if test $ac_cv_have_decl_strerror_r = no; then
+    HAVE_DECL_STRERROR_R=0
+  fi
+
+  if test $ac_cv_func_strerror_r = yes; then
+    if test "$ERRNO_H:$REPLACE_STRERROR_0" = :0; then
+      if test $gl_cv_func_strerror_r_posix_signature = yes; then
+        case "$gl_cv_func_strerror_r_works" in
+                    *no) REPLACE_STRERROR_R=1 ;;
+        esac
+      else
+                REPLACE_STRERROR_R=1
+      fi
+    else
+                  REPLACE_STRERROR_R=1
+    fi
+  fi
+
+
+    HAVE_PTHREAD_T=1;
+  HAVE_PTHREAD_SPINLOCK_T=1;
+  HAVE_PTHREAD_CREATE_DETACHED=1;
+  HAVE_PTHREAD_MUTEX_RECURSIVE=1;
+  HAVE_PTHREAD_MUTEX_ROBUST=1;
+  HAVE_PTHREAD_PROCESS_SHARED=1;
+  HAVE_PTHREAD_CREATE=1;
+  HAVE_PTHREAD_ATTR_INIT=1;
+  HAVE_PTHREAD_ATTR_GETDETACHSTATE=1;
+  HAVE_PTHREAD_ATTR_SETDETACHSTATE=1;
+  HAVE_PTHREAD_ATTR_DESTROY=1;
+  HAVE_PTHREAD_SELF=1;
+  HAVE_PTHREAD_EQUAL=1;
+  HAVE_PTHREAD_DETACH=1;
+  HAVE_PTHREAD_JOIN=1;
+  HAVE_PTHREAD_EXIT=1;
+  HAVE_PTHREAD_ONCE=1;
+  HAVE_PTHREAD_MUTEX_INIT=1;
+  HAVE_PTHREAD_MUTEXATTR_INIT=1;
+  HAVE_PTHREAD_MUTEXATTR_GETTYPE=1;
+  HAVE_PTHREAD_MUTEXATTR_SETTYPE=1;
+  HAVE_PTHREAD_MUTEXATTR_GETROBUST=1;
+  HAVE_PTHREAD_MUTEXATTR_SETROBUST=1;
+  HAVE_PTHREAD_MUTEXATTR_DESTROY=1;
+  HAVE_PTHREAD_MUTEX_LOCK=1;
+  HAVE_PTHREAD_MUTEX_TRYLOCK=1;
+  HAVE_PTHREAD_MUTEX_TIMEDLOCK=1;
+  HAVE_PTHREAD_MUTEX_UNLOCK=1;
+  HAVE_PTHREAD_MUTEX_DESTROY=1;
+  HAVE_PTHREAD_RWLOCK_INIT=1;
+  HAVE_PTHREAD_RWLOCKATTR_INIT=1;
+  HAVE_PTHREAD_RWLOCKATTR_DESTROY=1;
+  HAVE_PTHREAD_RWLOCK_RDLOCK=1;
+  HAVE_PTHREAD_RWLOCK_WRLOCK=1;
+  HAVE_PTHREAD_RWLOCK_TRYRDLOCK=1;
+  HAVE_PTHREAD_RWLOCK_TRYWRLOCK=1;
+  HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK=1;
+  HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK=1;
+  HAVE_PTHREAD_RWLOCK_UNLOCK=1;
+  HAVE_PTHREAD_RWLOCK_DESTROY=1;
+  HAVE_PTHREAD_COND_INIT=1;
+  HAVE_PTHREAD_CONDATTR_INIT=1;
+  HAVE_PTHREAD_CONDATTR_DESTROY=1;
+  HAVE_PTHREAD_COND_WAIT=1;
+  HAVE_PTHREAD_COND_TIMEDWAIT=1;
+  HAVE_PTHREAD_COND_SIGNAL=1;
+  HAVE_PTHREAD_COND_BROADCAST=1;
+  HAVE_PTHREAD_COND_DESTROY=1;
+  HAVE_PTHREAD_KEY_CREATE=1;
+  HAVE_PTHREAD_SETSPECIFIC=1;
+  HAVE_PTHREAD_GETSPECIFIC=1;
+  HAVE_PTHREAD_KEY_DELETE=1;
+  HAVE_PTHREAD_SPIN_INIT=1;
+  HAVE_PTHREAD_SPIN_LOCK=1;
+  HAVE_PTHREAD_SPIN_TRYLOCK=1;
+  HAVE_PTHREAD_SPIN_UNLOCK=1;
+  HAVE_PTHREAD_SPIN_DESTROY=1;
+  REPLACE_PTHREAD_CREATE=0;
+  REPLACE_PTHREAD_ATTR_INIT=0;
+  REPLACE_PTHREAD_ATTR_GETDETACHSTATE=0;
+  REPLACE_PTHREAD_ATTR_SETDETACHSTATE=0;
+  REPLACE_PTHREAD_ATTR_DESTROY=0;
+  REPLACE_PTHREAD_SELF=0;
+  REPLACE_PTHREAD_EQUAL=0;
+  REPLACE_PTHREAD_DETACH=0;
+  REPLACE_PTHREAD_JOIN=0;
+  REPLACE_PTHREAD_EXIT=0;
+  REPLACE_PTHREAD_ONCE=0;
+  REPLACE_PTHREAD_MUTEX_INIT=0;
+  REPLACE_PTHREAD_MUTEXATTR_INIT=0;
+  REPLACE_PTHREAD_MUTEXATTR_GETTYPE=0;
+  REPLACE_PTHREAD_MUTEXATTR_SETTYPE=0;
+  REPLACE_PTHREAD_MUTEXATTR_GETROBUST=0;
+  REPLACE_PTHREAD_MUTEXATTR_SETROBUST=0;
+  REPLACE_PTHREAD_MUTEXATTR_DESTROY=0;
+  REPLACE_PTHREAD_MUTEX_LOCK=0;
+  REPLACE_PTHREAD_MUTEX_TRYLOCK=0;
+  REPLACE_PTHREAD_MUTEX_TIMEDLOCK=0;
+  REPLACE_PTHREAD_MUTEX_UNLOCK=0;
+  REPLACE_PTHREAD_MUTEX_DESTROY=0;
+  REPLACE_PTHREAD_RWLOCK_INIT=0;
+  REPLACE_PTHREAD_RWLOCKATTR_INIT=0;
+  REPLACE_PTHREAD_RWLOCKATTR_DESTROY=0;
+  REPLACE_PTHREAD_RWLOCK_RDLOCK=0;
+  REPLACE_PTHREAD_RWLOCK_WRLOCK=0;
+  REPLACE_PTHREAD_RWLOCK_TRYRDLOCK=0;
+  REPLACE_PTHREAD_RWLOCK_TRYWRLOCK=0;
+  REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK=0;
+  REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK=0;
+  REPLACE_PTHREAD_RWLOCK_UNLOCK=0;
+  REPLACE_PTHREAD_RWLOCK_DESTROY=0;
+  REPLACE_PTHREAD_COND_INIT=0;
+  REPLACE_PTHREAD_CONDATTR_INIT=0;
+  REPLACE_PTHREAD_CONDATTR_DESTROY=0;
+  REPLACE_PTHREAD_COND_WAIT=0;
+  REPLACE_PTHREAD_COND_TIMEDWAIT=0;
+  REPLACE_PTHREAD_COND_SIGNAL=0;
+  REPLACE_PTHREAD_COND_BROADCAST=0;
+  REPLACE_PTHREAD_COND_DESTROY=0;
+  REPLACE_PTHREAD_KEY_CREATE=0;
+  REPLACE_PTHREAD_SETSPECIFIC=0;
+  REPLACE_PTHREAD_GETSPECIFIC=0;
+  REPLACE_PTHREAD_KEY_DELETE=0;
+  REPLACE_PTHREAD_SPIN_INIT=0;
+  REPLACE_PTHREAD_SPIN_LOCK=0;
+  REPLACE_PTHREAD_SPIN_TRYLOCK=0;
+  REPLACE_PTHREAD_SPIN_UNLOCK=0;
+  REPLACE_PTHREAD_SPIN_DESTROY=0;
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_pthread_h='<'pthread.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <pthread.h>" >&5
+printf %s "checking absolute name of <pthread.h>... " >&6; }
+if test ${gl_cv_next_pthread_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_pthread_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pthread.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'pthread.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_pthread_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_pthread_h
+           gl_cv_next_pthread_h='"'$gl_header'"'
+          else
+               gl_cv_next_pthread_h='<'pthread.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_pthread_h" >&5
+printf "%s\n" "$gl_cv_next_pthread_h" >&6; }
+     fi
+     NEXT_PTHREAD_H=$gl_cv_next_pthread_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'pthread.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_pthread_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_PTHREAD_H=$gl_next_as_first_directive
+
+
+
+
+  if test $ac_cv_header_pthread_h = yes; then
+    HAVE_PTHREAD_H=1
+
+
+      if { case "$host_os" in mingw*) true;; *) false;; esac; } \
+         && test $gl_threads_api = windows; then
+        HAVE_PTHREAD_H=0
+      fi
+
+  else
+    HAVE_PTHREAD_H=0
+  fi
+
+
+  ac_fn_c_check_type "$LINENO" "pthread_t" "ac_cv_type_pthread_t" "$ac_includes_default
+     #if HAVE_PTHREAD_H
+      #include <pthread.h>
+     #endif
+"
+if test "x$ac_cv_type_pthread_t" = xyes
+then :
+
+printf "%s\n" "#define HAVE_PTHREAD_T 1" >>confdefs.h
+
+
+fi
+ac_fn_c_check_type "$LINENO" "pthread_spinlock_t" "ac_cv_type_pthread_spinlock_t" "$ac_includes_default
+     #if HAVE_PTHREAD_H
+      #include <pthread.h>
+     #endif
+"
+if test "x$ac_cv_type_pthread_spinlock_t" = xyes
+then :
+
+printf "%s\n" "#define HAVE_PTHREAD_SPINLOCK_T 1" >>confdefs.h
+
+
+fi
+
+  if test $ac_cv_type_pthread_t != yes; then
+    HAVE_PTHREAD_T=0
+  fi
+  if test $ac_cv_type_pthread_spinlock_t != yes; then
+    HAVE_PTHREAD_SPINLOCK_T=0
+  fi
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for PTHREAD_CREATE_DETACHED" >&5
+printf %s "checking for PTHREAD_CREATE_DETACHED... " >&6; }
+if test ${gl_cv_const_PTHREAD_CREATE_DETACHED+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pthread.h>
+            int x = PTHREAD_CREATE_DETACHED;
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_const_PTHREAD_CREATE_DETACHED=yes
+else $as_nop
+  gl_cv_const_PTHREAD_CREATE_DETACHED=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_const_PTHREAD_CREATE_DETACHED" >&5
+printf "%s\n" "$gl_cv_const_PTHREAD_CREATE_DETACHED" >&6; }
+  if test $gl_cv_const_PTHREAD_CREATE_DETACHED != yes; then
+    HAVE_PTHREAD_CREATE_DETACHED=0
+  fi
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for PTHREAD_MUTEX_RECURSIVE" >&5
+printf %s "checking for PTHREAD_MUTEX_RECURSIVE... " >&6; }
+if test ${gl_cv_const_PTHREAD_MUTEX_RECURSIVE+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pthread.h>
+            int x = PTHREAD_MUTEX_RECURSIVE;
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_const_PTHREAD_MUTEX_RECURSIVE=yes
+else $as_nop
+  gl_cv_const_PTHREAD_MUTEX_RECURSIVE=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_const_PTHREAD_MUTEX_RECURSIVE" >&5
+printf "%s\n" "$gl_cv_const_PTHREAD_MUTEX_RECURSIVE" >&6; }
+  if test $gl_cv_const_PTHREAD_MUTEX_RECURSIVE != yes; then
+    HAVE_PTHREAD_MUTEX_RECURSIVE=0
+  fi
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for PTHREAD_MUTEX_ROBUST" >&5
+printf %s "checking for PTHREAD_MUTEX_ROBUST... " >&6; }
+if test ${gl_cv_const_PTHREAD_MUTEX_ROBUST+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pthread.h>
+            int x = PTHREAD_MUTEX_ROBUST;
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_const_PTHREAD_MUTEX_ROBUST=yes
+else $as_nop
+  gl_cv_const_PTHREAD_MUTEX_ROBUST=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_const_PTHREAD_MUTEX_ROBUST" >&5
+printf "%s\n" "$gl_cv_const_PTHREAD_MUTEX_ROBUST" >&6; }
+  if test $gl_cv_const_PTHREAD_MUTEX_ROBUST != yes; then
+    HAVE_PTHREAD_MUTEX_ROBUST=0
+  fi
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for PTHREAD_PROCESS_SHARED" >&5
+printf %s "checking for PTHREAD_PROCESS_SHARED... " >&6; }
+if test ${gl_cv_const_PTHREAD_PROCESS_SHARED+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pthread.h>
+            int x = PTHREAD_PROCESS_SHARED;
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_const_PTHREAD_PROCESS_SHARED=yes
+else $as_nop
+  gl_cv_const_PTHREAD_PROCESS_SHARED=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_const_PTHREAD_PROCESS_SHARED" >&5
+printf "%s\n" "$gl_cv_const_PTHREAD_PROCESS_SHARED" >&6; }
+  if test $gl_cv_const_PTHREAD_PROCESS_SHARED != yes; then
+    HAVE_PTHREAD_PROCESS_SHARED=0
+  fi
+
+
+
+
+
+
+
+    LIB_PTHREAD="$LIBPMULTITHREAD"
+
+
+
+
+  GL_GNULIB_PTHREAD_THREAD=0
+
+
+
+  GL_GNULIB_PTHREAD_ONCE=0
+
+
+
+  GL_GNULIB_PTHREAD_MUTEX=0
+
+
+
+  GL_GNULIB_PTHREAD_RWLOCK=0
+
+
+
+  GL_GNULIB_PTHREAD_COND=0
+
+
+
+  GL_GNULIB_PTHREAD_TSS=0
+
+
+
+  GL_GNULIB_PTHREAD_SPIN=0
+
+
+
+  GL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK=0
+
+
+
+
+
+    HAVE_SCHED_YIELD=1;
+  REPLACE_SCHED_YIELD=0;
+
+
+
+
+
+
+
+  ac_fn_c_check_header_compile "$LINENO" "sched.h" "ac_cv_header_sched_h" "#if HAVE_SYS_CDEFS_H
+       #include <sys/cdefs.h>
+      #endif
+
+"
+if test "x$ac_cv_header_sched_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SCHED_H 1" >>confdefs.h
+
+fi
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_sched_h='<'sched.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <sched.h>" >&5
+printf %s "checking absolute name of <sched.h>... " >&6; }
+if test ${gl_cv_next_sched_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sched.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'sched.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_sched_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_sched_h
+           gl_cv_next_sched_h='"'$gl_header'"'
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_sched_h" >&5
+printf "%s\n" "$gl_cv_next_sched_h" >&6; }
+     fi
+     NEXT_SCHED_H=$gl_cv_next_sched_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'sched.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_sched_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_SCHED_H=$gl_next_as_first_directive
+
+
+
+
+
+  if test "$ac_cv_header_sched_h" = yes; then
+    HAVE_SCHED_H=1
+  else
+    HAVE_SCHED_H=0
+  fi
+
+
+  if test "$HAVE_SCHED_H" = 1; then
+    ac_fn_c_check_type "$LINENO" "struct sched_param" "ac_cv_type_struct_sched_param" "#if HAVE_SYS_CDEFS_H
+         #include <sys/cdefs.h>
+        #endif
+        #include <sched.h>
+
+"
+if test "x$ac_cv_type_struct_sched_param" = xyes
+then :
+  HAVE_STRUCT_SCHED_PARAM=1
+else $as_nop
+  HAVE_STRUCT_SCHED_PARAM=0
+fi
+
+  else
+    HAVE_STRUCT_SCHED_PARAM=0
+    case "$host_os" in
+      os2*)
+                ac_fn_c_check_type "$LINENO" "struct sched_param" "ac_cv_type_struct_sched_param" "#include <spawn.h>
+"
+if test "x$ac_cv_type_struct_sched_param" = xyes
+then :
+  HAVE_STRUCT_SCHED_PARAM=1
+fi
+
+        ;;
+      vms)
+                ac_fn_c_check_type "$LINENO" "struct sched_param" "ac_cv_type_struct_sched_param" "#include <pthread.h>
+"
+if test "x$ac_cv_type_struct_sched_param" = xyes
+then :
+  HAVE_STRUCT_SCHED_PARAM=1
+fi
+
+        ;;
+    esac
+  fi
+
+
+  if test "$ac_cv_header_sys_cdefs_h" = yes; then
+    HAVE_SYS_CDEFS_H=1
+  else
+    HAVE_SYS_CDEFS_H=0
+  fi
+
+
+
+
+
+
+
+
+
+
+  GL_GNULIB_SCHED_YIELD=0
+
+
+
+
+
+  GL_GNULIB_PSELECT=0
+
+
+
+  GL_GNULIB_SELECT=0
+
+
+
+
+ac_fn_check_decl "$LINENO" "setenv" "ac_cv_have_decl_setenv" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_setenv" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_SETENV $ac_have_decl" >>confdefs.h
+
+
+
+
+
+  if test $ac_cv_have_decl_setenv = no; then
+    HAVE_DECL_SETENV=0
+  fi
+
+
+
+
+
+  ac_fn_c_check_header_compile "$LINENO" "search.h" "ac_cv_header_search_h" "$ac_includes_default"
+if test "x$ac_cv_header_search_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SEARCH_H 1" >>confdefs.h
+
+fi
+
+  ac_fn_c_check_func "$LINENO" "tsearch" "ac_cv_func_tsearch"
+if test "x$ac_cv_func_tsearch" = xyes
+then :
+  printf "%s\n" "#define HAVE_TSEARCH 1" >>confdefs.h
+
+fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether snprintf returns a byte count as in C99" >&5
+printf %s "checking whether snprintf returns a byte count as in C99... " >&6; }
+if test ${gl_cv_func_snprintf_retval_c99+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                                 # Guess yes on glibc systems.
+           *-gnu* | gnu*)        gl_cv_func_snprintf_retval_c99="guessing yes";;
+                                 # Guess yes on musl systems.
+           *-musl*)              gl_cv_func_snprintf_retval_c99="guessing yes";;
+                                 # Guess yes on FreeBSD >= 5.
+           freebsd[1-4].*)       gl_cv_func_snprintf_retval_c99="guessing no";;
+           freebsd* | kfreebsd*) gl_cv_func_snprintf_retval_c99="guessing yes";;
+           midnightbsd*)         gl_cv_func_snprintf_retval_c99="guessing yes";;
+                                 # Guess yes on Mac OS X >= 10.3.
+           darwin[1-6].*)        gl_cv_func_snprintf_retval_c99="guessing no";;
+           darwin*)              gl_cv_func_snprintf_retval_c99="guessing yes";;
+                                 # Guess yes on OpenBSD >= 3.9.
+           openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
+                                 gl_cv_func_snprintf_retval_c99="guessing no";;
+           openbsd*)             gl_cv_func_snprintf_retval_c99="guessing yes";;
+                                 # Guess yes on Solaris >= 2.10.
+           solaris2.[1-9][0-9]*) gl_cv_func_printf_sizes_c99="guessing yes";;
+           solaris*)             gl_cv_func_printf_sizes_c99="guessing no";;
+                                 # Guess yes on AIX >= 4.
+           aix[1-3]*)            gl_cv_func_snprintf_retval_c99="guessing no";;
+           aix*)                 gl_cv_func_snprintf_retval_c99="guessing yes";;
+                                 # Guess yes on NetBSD >= 3.
+           netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                                 gl_cv_func_snprintf_retval_c99="guessing no";;
+           netbsd*)              gl_cv_func_snprintf_retval_c99="guessing yes";;
+                                 # Guess yes on BeOS.
+           beos*)                gl_cv_func_snprintf_retval_c99="guessing yes";;
+                                 # Guess yes on Android.
+           linux*-android*)      gl_cv_func_snprintf_retval_c99="guessing yes";;
+                                 # Guess yes on MSVC, no on mingw.
+           mingw*)               cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#ifdef _MSC_VER
+ Known
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Known" >/dev/null 2>&1
+then :
+  gl_cv_func_snprintf_retval_c99="guessing yes"
+else $as_nop
+  gl_cv_func_snprintf_retval_c99="guessing no"
+fi
+rm -rf conftest*
+
+                                 ;;
+                                 # If we don't know, obey --enable-cross-guesses.
+           *)                    gl_cv_func_snprintf_retval_c99="$gl_cross_guess_normal";;
+         esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdio.h>
+#include <string.h>
+#if HAVE_SNPRINTF
+# define my_snprintf snprintf
+#else
+# include <stdarg.h>
+static int my_snprintf (char *buf, int size, const char *format, ...)
+{
+  va_list args;
+  int ret;
+  va_start (args, format);
+  ret = vsnprintf (buf, size, format, args);
+  va_end (args);
+  return ret;
+}
+#endif
+static char buf[100];
+int main ()
+{
+  strcpy (buf, "ABCDEF");
+  if (my_snprintf (buf, 3, "%d %d", 4567, 89) != 7)
+    return 1;
+  if (my_snprintf (buf, 0, "%d %d", 4567, 89) != 7)
+    return 2;
+  if (my_snprintf (NULL, 0, "%d %d", 4567, 89) != 7)
+    return 3;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_snprintf_retval_c99=yes
+else $as_nop
+  gl_cv_func_snprintf_retval_c99=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_snprintf_retval_c99" >&5
+printf "%s\n" "$gl_cv_func_snprintf_retval_c99" >&6; }
+
+ac_fn_check_decl "$LINENO" "snprintf" "ac_cv_have_decl_snprintf" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_snprintf" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_SNPRINTF $ac_have_decl" >>confdefs.h
+
+
+
+
+
+
+
+  if test $ac_cv_header_sys_ioctl_h = yes; then
+    HAVE_SYS_IOCTL_H=1
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether <sys/ioctl.h> declares ioctl" >&5
+printf %s "checking whether <sys/ioctl.h> declares ioctl... " >&6; }
+if test ${gl_cv_decl_ioctl_in_sys_ioctl_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/ioctl.h>
+int
+main (void)
+{
+(void) ioctl;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_decl_ioctl_in_sys_ioctl_h=yes
+else $as_nop
+  gl_cv_decl_ioctl_in_sys_ioctl_h=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_decl_ioctl_in_sys_ioctl_h" >&5
+printf "%s\n" "$gl_cv_decl_ioctl_in_sys_ioctl_h" >&6; }
+  else
+    HAVE_SYS_IOCTL_H=0
+  fi
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_sys_ioctl_h='<'sys/ioctl.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <sys/ioctl.h>" >&5
+printf %s "checking absolute name of <sys/ioctl.h>... " >&6; }
+if test ${gl_cv_next_sys_ioctl_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_sys_ioctl_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/ioctl.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'sys/ioctl.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_sys_ioctl_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_sys_ioctl_h
+           gl_cv_next_sys_ioctl_h='"'$gl_header'"'
+          else
+               gl_cv_next_sys_ioctl_h='<'sys/ioctl.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_sys_ioctl_h" >&5
+printf "%s\n" "$gl_cv_next_sys_ioctl_h" >&6; }
+     fi
+     NEXT_SYS_IOCTL_H=$gl_cv_next_sys_ioctl_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'sys/ioctl.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_sys_ioctl_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H=$gl_next_as_first_directive
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_sys_uio_h='<'sys/uio.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <sys/uio.h>" >&5
+printf %s "checking absolute name of <sys/uio.h>... " >&6; }
+if test ${gl_cv_next_sys_uio_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_sys_uio_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/uio.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'sys/uio.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_sys_uio_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_sys_uio_h
+           gl_cv_next_sys_uio_h='"'$gl_header'"'
+          else
+               gl_cv_next_sys_uio_h='<'sys/uio.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_sys_uio_h" >&5
+printf "%s\n" "$gl_cv_next_sys_uio_h" >&6; }
+     fi
+     NEXT_SYS_UIO_H=$gl_cv_next_sys_uio_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'sys/uio.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_sys_uio_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H=$gl_next_as_first_directive
+
+
+
+
+  if test $ac_cv_header_sys_uio_h = yes; then
+    HAVE_SYS_UIO_H=1
+  else
+    HAVE_SYS_UIO_H=0
+  fi
+
+
+
+
+ac_fn_check_decl "$LINENO" "unsetenv" "ac_cv_have_decl_unsetenv" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_unsetenv" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_UNSETENV $ac_have_decl" >>confdefs.h
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for inttypes.h" >&5
+printf %s "checking for inttypes.h... " >&6; }
+if test ${gl_cv_header_inttypes_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <sys/types.h>
+#include <inttypes.h>
+
+int
+main (void)
+{
+uintmax_t i = (uintmax_t) -1; return !i;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_inttypes_h=yes
+else $as_nop
+  gl_cv_header_inttypes_h=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_inttypes_h" >&5
+printf "%s\n" "$gl_cv_header_inttypes_h" >&6; }
+  if test $gl_cv_header_inttypes_h = yes; then
+
+printf "%s\n" "#define HAVE_INTTYPES_H_WITH_UINTMAX 1" >>confdefs.h
+
+  fi
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for stdint.h" >&5
+printf %s "checking for stdint.h... " >&6; }
+if test ${gl_cv_header_stdint_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+            #include <stdint.h>
+int
+main (void)
+{
+uintmax_t i = (uintmax_t) -1; return !i;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_stdint_h=yes
+else $as_nop
+  gl_cv_header_stdint_h=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_stdint_h" >&5
+printf "%s\n" "$gl_cv_header_stdint_h" >&6; }
+  if test $gl_cv_header_stdint_h = yes; then
+
+printf "%s\n" "#define HAVE_STDINT_H_WITH_UINTMAX 1" >>confdefs.h
+
+  fi
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for intmax_t" >&5
+printf %s "checking for intmax_t... " >&6; }
+if test ${gt_cv_c_intmax_t+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stddef.h>
+#include <stdlib.h>
+#if HAVE_STDINT_H_WITH_UINTMAX
+#include <stdint.h>
+#endif
+#if HAVE_INTTYPES_H_WITH_UINTMAX
+#include <inttypes.h>
+#endif
+
+int
+main (void)
+{
+intmax_t x = -1; return !x;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gt_cv_c_intmax_t=yes
+else $as_nop
+  gt_cv_c_intmax_t=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_c_intmax_t" >&5
+printf "%s\n" "$gt_cv_c_intmax_t" >&6; }
+  if test $gt_cv_c_intmax_t = yes; then
+
+printf "%s\n" "#define HAVE_INTMAX_T 1" >>confdefs.h
+
+  else
+
+printf "%s\n" "#define intmax_t long long" >>confdefs.h
+
+  fi
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking where to find the exponent in a 'double'" >&5
+printf %s "checking where to find the exponent in a 'double'... " >&6; }
+if test ${gl_cv_cc_double_expbit0+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      if test "$cross_compiling" = yes
+then :
+
+                                                                      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#if defined arm || defined __arm || defined __arm__
+  mixed_endianness
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "mixed_endianness" >/dev/null 2>&1
+then :
+  gl_cv_cc_double_expbit0="unknown"
+else $as_nop
+
+                                                         :
+if test ${ac_cv_c_bigendian+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_c_bigendian=unknown
+    # See if we're dealing with a universal compiler.
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifndef __APPLE_CC__
+	       not a universal capable compiler
+	     #endif
+	     typedef int dummy;
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+
+	# Check for potential -arch flags.  It is not universal unless
+	# there are at least two -arch flags with different values.
+	ac_arch=
+	ac_prev=
+	for ac_word in $CC $CFLAGS $CPPFLAGS $LDFLAGS; do
+	 if test -n "$ac_prev"; then
+	   case $ac_word in
+	     i?86 | x86_64 | ppc | ppc64)
+	       if test -z "$ac_arch" || test "$ac_arch" = "$ac_word"; then
+		 ac_arch=$ac_word
+	       else
+		 ac_cv_c_bigendian=universal
+		 break
+	       fi
+	       ;;
+	   esac
+	   ac_prev=
+	 elif test "x$ac_word" = "x-arch"; then
+	   ac_prev=arch
+	 fi
+       done
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+    if test $ac_cv_c_bigendian = unknown; then
+      # See if sys/param.h defines the BYTE_ORDER macro.
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+	     #include <sys/param.h>
+
+int
+main (void)
+{
+#if ! (defined BYTE_ORDER && defined BIG_ENDIAN \
+		     && defined LITTLE_ENDIAN && BYTE_ORDER && BIG_ENDIAN \
+		     && LITTLE_ENDIAN)
+	      bogus endian macros
+	     #endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  # It does; now see whether it defined to BIG_ENDIAN or not.
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+		#include <sys/param.h>
+
+int
+main (void)
+{
+#if BYTE_ORDER != BIG_ENDIAN
+		 not big endian
+		#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_c_bigendian=yes
+else $as_nop
+  ac_cv_c_bigendian=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+    fi
+    if test $ac_cv_c_bigendian = unknown; then
+      # See if <limits.h> defines _LITTLE_ENDIAN or _BIG_ENDIAN (e.g., Solaris).
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <limits.h>
+
+int
+main (void)
+{
+#if ! (defined _LITTLE_ENDIAN || defined _BIG_ENDIAN)
+	      bogus endian macros
+	     #endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  # It does; now see whether it defined to _BIG_ENDIAN or not.
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <limits.h>
+
+int
+main (void)
+{
+#ifndef _BIG_ENDIAN
+		 not big endian
+		#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_c_bigendian=yes
+else $as_nop
+  ac_cv_c_bigendian=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+    fi
+    if test $ac_cv_c_bigendian = unknown; then
+      # Compile a test program.
+      if test "$cross_compiling" = yes
+then :
+  # Try to guess by grepping values from an object file.
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+unsigned short int ascii_mm[] =
+		  { 0x4249, 0x4765, 0x6E44, 0x6961, 0x6E53, 0x7953, 0 };
+		unsigned short int ascii_ii[] =
+		  { 0x694C, 0x5454, 0x656C, 0x6E45, 0x6944, 0x6E61, 0 };
+		int use_ascii (int i) {
+		  return ascii_mm[i] + ascii_ii[i];
+		}
+		unsigned short int ebcdic_ii[] =
+		  { 0x89D3, 0xE3E3, 0x8593, 0x95C5, 0x89C4, 0x9581, 0 };
+		unsigned short int ebcdic_mm[] =
+		  { 0xC2C9, 0xC785, 0x95C4, 0x8981, 0x95E2, 0xA8E2, 0 };
+		int use_ebcdic (int i) {
+		  return ebcdic_mm[i] + ebcdic_ii[i];
+		}
+		extern int foo;
+
+int
+main (void)
+{
+return use_ascii (foo) == use_ebcdic (foo);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  if grep BIGenDianSyS conftest.$ac_objext >/dev/null; then
+	      ac_cv_c_bigendian=yes
+	    fi
+	    if grep LiTTleEnDian conftest.$ac_objext >/dev/null ; then
+	      if test "$ac_cv_c_bigendian" = unknown; then
+		ac_cv_c_bigendian=no
+	      else
+		# finding both strings is unlikely to happen, but who knows?
+		ac_cv_c_bigendian=unknown
+	      fi
+	    fi
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+int
+main (void)
+{
+
+	     /* Are we little or big endian?  From Harbison&Steele.  */
+	     union
+	     {
+	       long int l;
+	       char c[sizeof (long int)];
+	     } u;
+	     u.l = 1;
+	     return u.c[sizeof (long int) - 1] == 1;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  ac_cv_c_bigendian=no
+else $as_nop
+  ac_cv_c_bigendian=yes
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+    fi
+fi
+:
+ case $ac_cv_c_bigendian in #(
+   yes)
+     gl_cv_cc_double_expbit0="word 0 bit 20";; #(
+   no)
+     gl_cv_cc_double_expbit0="word 1 bit 20" ;; #(
+   universal)
+
+printf "%s\n" "#define AC_APPLE_UNIVERSAL_BUILD 1" >>confdefs.h
+
+     ;; #(
+   *)
+     gl_cv_cc_double_expbit0="unknown" ;;
+ esac
+
+
+fi
+rm -rf conftest*
+
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <float.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#define NWORDS \
+  ((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
+typedef union { double value; unsigned int word[NWORDS]; } memory_double;
+static unsigned int ored_words[NWORDS];
+static unsigned int anded_words[NWORDS];
+static void add_to_ored_words (double x)
+{
+  memory_double m;
+  size_t i;
+  /* Clear it first, in case sizeof (double) < sizeof (memory_double).  */
+  memset (&m, 0, sizeof (memory_double));
+  m.value = x;
+  for (i = 0; i < NWORDS; i++)
+    {
+      ored_words[i] |= m.word[i];
+      anded_words[i] &= m.word[i];
+    }
+}
+int main ()
+{
+  size_t j;
+  FILE *fp = fopen ("conftest.out", "w");
+  if (fp == NULL)
+    return 1;
+  for (j = 0; j < NWORDS; j++)
+    anded_words[j] = ~ (unsigned int) 0;
+  add_to_ored_words (0.25);
+  add_to_ored_words (0.5);
+  add_to_ored_words (1.0);
+  add_to_ored_words (2.0);
+  add_to_ored_words (4.0);
+  /* Remove bits that are common (e.g. if representation of the first mantissa
+     bit is explicit).  */
+  for (j = 0; j < NWORDS; j++)
+    ored_words[j] &= ~anded_words[j];
+  /* Now find the nonzero word.  */
+  for (j = 0; j < NWORDS; j++)
+    if (ored_words[j] != 0)
+      break;
+  if (j < NWORDS)
+    {
+      size_t i;
+      for (i = j + 1; i < NWORDS; i++)
+        if (ored_words[i] != 0)
+          {
+            fprintf (fp, "unknown");
+            return (fclose (fp) != 0);
+          }
+      for (i = 0; ; i++)
+        if ((ored_words[j] >> i) & 1)
+          {
+            fprintf (fp, "word %d bit %d", (int) j, (int) i);
+            return (fclose (fp) != 0);
+          }
+    }
+  fprintf (fp, "unknown");
+  return (fclose (fp) != 0);
+}
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_cc_double_expbit0=`cat conftest.out`
+else $as_nop
+  gl_cv_cc_double_expbit0="unknown"
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      rm -f conftest.out
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_cc_double_expbit0" >&5
+printf "%s\n" "$gl_cv_cc_double_expbit0" >&6; }
+  case "$gl_cv_cc_double_expbit0" in
+    word*bit*)
+      word=`echo "$gl_cv_cc_double_expbit0" | sed -e 's/word //' -e 's/ bit.*//'`
+      bit=`echo "$gl_cv_cc_double_expbit0" | sed -e 's/word.*bit //'`
+
+printf "%s\n" "#define DBL_EXPBIT0_WORD $word" >>confdefs.h
+
+
+printf "%s\n" "#define DBL_EXPBIT0_BIT $bit" >>confdefs.h
+
+      ;;
+  esac
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether snprintf truncates the result as in C99" >&5
+printf %s "checking whether snprintf truncates the result as in C99... " >&6; }
+if test ${gl_cv_func_snprintf_truncation_c99+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      if test "$cross_compiling" = yes
+then :
+
+         case "$host_os" in
+                                 # Guess yes on glibc systems.
+           *-gnu* | gnu*)        gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on musl systems.
+           *-musl*)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on FreeBSD >= 5.
+           freebsd[1-4].*)       gl_cv_func_snprintf_truncation_c99="guessing no";;
+           freebsd* | kfreebsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
+           midnightbsd*)         gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on Mac OS X >= 10.3.
+           darwin[1-6].*)        gl_cv_func_snprintf_truncation_c99="guessing no";;
+           darwin*)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on OpenBSD >= 3.9.
+           openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
+                                 gl_cv_func_snprintf_truncation_c99="guessing no";;
+           openbsd*)             gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on Solaris >= 2.6.
+           solaris2.[0-5] | solaris2.[0-5].*)
+                                 gl_cv_func_snprintf_truncation_c99="guessing no";;
+           solaris*)             gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on AIX >= 4.
+           aix[1-3]*)            gl_cv_func_snprintf_truncation_c99="guessing no";;
+           aix*)                 gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on HP-UX >= 11.
+           hpux[7-9]* | hpux10*) gl_cv_func_snprintf_truncation_c99="guessing no";;
+           hpux*)                gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on IRIX >= 6.5.
+           irix6.5)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on OSF/1 >= 5.
+           osf[3-4]*)            gl_cv_func_snprintf_truncation_c99="guessing no";;
+           osf*)                 gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on NetBSD >= 3.
+           netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                                 gl_cv_func_snprintf_truncation_c99="guessing no";;
+           netbsd*)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on BeOS.
+           beos*)                gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on Android.
+           linux*-android*)      gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess no on native Windows.
+           mingw*)               gl_cv_func_snprintf_truncation_c99="guessing no";;
+                                 # If we don't know, obey --enable-cross-guesses.
+           *)                    gl_cv_func_snprintf_truncation_c99="$gl_cross_guess_normal";;
+         esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdio.h>
+#include <string.h>
+#if HAVE_SNPRINTF
+# define my_snprintf snprintf
+#else
+# include <stdarg.h>
+static int my_snprintf (char *buf, int size, const char *format, ...)
+{
+  va_list args;
+  int ret;
+  va_start (args, format);
+  ret = vsnprintf (buf, size, format, args);
+  va_end (args);
+  return ret;
+}
+#endif
+static char buf[100];
+int main ()
+{
+  strcpy (buf, "ABCDEF");
+  my_snprintf (buf, 3, "%d %d", 4567, 89);
+  if (memcmp (buf, "45\0DEF", 6) != 0)
+    return 1;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_snprintf_truncation_c99=yes
+else $as_nop
+  gl_cv_func_snprintf_truncation_c99=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_snprintf_truncation_c99" >&5
+printf "%s\n" "$gl_cv_func_snprintf_truncation_c99" >&6; }
+
+
+
+
+
+  ac_fn_c_check_func "$LINENO" "snprintf" "ac_cv_func_snprintf"
+if test "x$ac_cv_func_snprintf" = xyes
+then :
+  printf "%s\n" "#define HAVE_SNPRINTF 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "strnlen" "ac_cv_func_strnlen"
+if test "x$ac_cv_func_strnlen" = xyes
+then :
+  printf "%s\n" "#define HAVE_STRNLEN 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "wcslen" "ac_cv_func_wcslen"
+if test "x$ac_cv_func_wcslen" = xyes
+then :
+  printf "%s\n" "#define HAVE_WCSLEN 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "wcsnlen" "ac_cv_func_wcsnlen"
+if test "x$ac_cv_func_wcsnlen" = xyes
+then :
+  printf "%s\n" "#define HAVE_WCSNLEN 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "mbrtowc" "ac_cv_func_mbrtowc"
+if test "x$ac_cv_func_mbrtowc" = xyes
+then :
+  printf "%s\n" "#define HAVE_MBRTOWC 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "wcrtomb" "ac_cv_func_wcrtomb"
+if test "x$ac_cv_func_wcrtomb" = xyes
+then :
+  printf "%s\n" "#define HAVE_WCRTOMB 1" >>confdefs.h
+
+fi
+
+      ac_fn_check_decl "$LINENO" "_snprintf" "ac_cv_have_decl__snprintf" "#include <stdio.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl__snprintf" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL__SNPRINTF $ac_have_decl" >>confdefs.h
+
+
+
+  case "$gl_cv_func_snprintf_retval_c99" in
+    *yes)
+
+printf "%s\n" "#define HAVE_SNPRINTF_RETVAL_C99 1" >>confdefs.h
+
+      ;;
+  esac
+
+  case "$gl_cv_func_snprintf_truncation_c99" in
+    *yes)
+
+printf "%s\n" "#define HAVE_SNPRINTF_TRUNCATION_C99 1" >>confdefs.h
+
+      ;;
+  esac
+
+
+   if false; then
+  GL_COND_LIBTOOL_TRUE=
+  GL_COND_LIBTOOL_FALSE='#'
+else
+  GL_COND_LIBTOOL_TRUE='#'
+  GL_COND_LIBTOOL_FALSE=
+fi
+
+  gl_cond_libtool=false
+  gl_libdeps=
+  gl_ltlibdeps=
+  gl_m4_base='m4'
+
+
+
+
+
+
+
+
+
+
+
+
+  gl_source_base='lib'
+
+
+  if test $ac_cv_func_alloca_works = no; then
+    :
+  fi
+
+  # Define an additional variable used in the Makefile substitution.
+  if test $ac_cv_working_alloca_h = yes; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for alloca as a compiler built-in" >&5
+printf %s "checking for alloca as a compiler built-in... " >&6; }
+if test ${gl_cv_rpl_alloca+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#if defined __GNUC__ || defined _AIX || defined _MSC_VER
+        Need own alloca
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Need own alloca" >/dev/null 2>&1
+then :
+  gl_cv_rpl_alloca=yes
+else $as_nop
+  gl_cv_rpl_alloca=no
+fi
+rm -rf conftest*
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_rpl_alloca" >&5
+printf "%s\n" "$gl_cv_rpl_alloca" >&6; }
+    if test $gl_cv_rpl_alloca = yes; then
+
+printf "%s\n" "#define HAVE_ALLOCA 1" >>confdefs.h
+
+      ALLOCA_H=alloca.h
+    else
+                  ALLOCA_H=
+    fi
+  else
+    ALLOCA_H=alloca.h
+  fi
+
+   if test -n "$ALLOCA_H"; then
+  GL_GENERATE_ALLOCA_H_TRUE=
+  GL_GENERATE_ALLOCA_H_FALSE='#'
+else
+  GL_GENERATE_ALLOCA_H_TRUE='#'
+  GL_GENERATE_ALLOCA_H_FALSE=
+fi
+
+
+  if test $ac_cv_working_alloca_h = yes; then
+    HAVE_ALLOCA_H=1
+  else
+    HAVE_ALLOCA_H=0
+  fi
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether to enable assertions" >&5
+printf %s "checking whether to enable assertions... " >&6; }
+  # Check whether --enable-assert was given.
+if test ${enable_assert+y}
+then :
+  enableval=$enable_assert; if test "x$enableval" = xno
+then :
+
+printf "%s\n" "#define NDEBUG 1" >>confdefs.h
+
+elif test "x$enableval" != xyes
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: invalid argument supplied to --enable-assert" >&5
+printf "%s\n" "$as_me: WARNING: invalid argument supplied to --enable-assert" >&2;}
+      enable_assert=yes
+fi
+else $as_nop
+  enable_assert=yes
+fi
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $enable_assert" >&5
+printf "%s\n" "$enable_assert" >&6; }
+
+
+
+
+
+
+
+
+  if test $ac_cv_func_btowc = no; then
+    HAVE_BTOWC=0
+  else
+
+
+
+
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether btowc(0) is correct" >&5
+printf %s "checking whether btowc(0) is correct... " >&6; }
+if test ${gl_cv_func_btowc_nul+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+        if test "$cross_compiling" = yes
+then :
+
+           case "$host_os" in
+                      # Guess no on Cygwin.
+             cygwin*) gl_cv_func_btowc_nul="guessing no" ;;
+                      # Guess yes on native Windows.
+             mingw*)  gl_cv_func_btowc_nul="guessing yes" ;;
+                      # Guess yes otherwise.
+             *)       gl_cv_func_btowc_nul="guessing yes" ;;
+           esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <wchar.h>
+int main ()
+{
+  if (btowc ('\0') != 0)
+    return 1;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_btowc_nul=yes
+else $as_nop
+  gl_cv_func_btowc_nul=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_btowc_nul" >&5
+printf "%s\n" "$gl_cv_func_btowc_nul" >&6; }
+
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether btowc(EOF) is correct" >&5
+printf %s "checking whether btowc(EOF) is correct... " >&6; }
+if test ${gl_cv_func_btowc_eof+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                        case "$host_os" in
+                  # Guess no on IRIX.
+          irix*)  gl_cv_func_btowc_eof="guessing no" ;;
+                  # Guess yes on native Windows.
+          mingw*) gl_cv_func_btowc_eof="guessing yes" ;;
+                  # Guess yes otherwise.
+          *)      gl_cv_func_btowc_eof="guessing yes" ;;
+        esac
+        if test $LOCALE_FR != none; then
+          if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdio.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
+    {
+      if (btowc (EOF) != WEOF)
+        return 1;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_btowc_eof=yes
+else $as_nop
+  gl_cv_func_btowc_eof=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+        fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_btowc_eof" >&5
+printf "%s\n" "$gl_cv_func_btowc_eof" >&6; }
+
+    case "$gl_cv_func_btowc_nul" in
+      *yes) ;;
+      *) REPLACE_BTOWC=1 ;;
+    esac
+    case "$gl_cv_func_btowc_eof" in
+      *yes) ;;
+      *) REPLACE_BTOWC=1 ;;
+    esac
+  fi
+
+  if test $HAVE_BTOWC = 0 || test $REPLACE_BTOWC = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS btowc.$ac_objext"
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_BTOWC=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_BTOWC 1" >>confdefs.h
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for __builtin_expect" >&5
+printf %s "checking for __builtin_expect... " >&6; }
+if test ${gl_cv___builtin_expect+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+         int
+         main (int argc, char **argv)
+         {
+           argc = __builtin_expect (argc, 100);
+           return argv[argc != 100][0];
+         }
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv___builtin_expect=yes
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+             #include <builtins.h>
+             int
+             main (int argc, char **argv)
+             {
+               argc = __builtin_expect (argc, 100);
+               return argv[argc != 100][0];
+             }
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv___builtin_expect="in <builtins.h>"
+else $as_nop
+  gl_cv___builtin_expect=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv___builtin_expect" >&5
+printf "%s\n" "$gl_cv___builtin_expect" >&6; }
+  if test "$gl_cv___builtin_expect" = yes; then
+    printf "%s\n" "#define HAVE___BUILTIN_EXPECT 1" >>confdefs.h
+
+  elif test "$gl_cv___builtin_expect" = "in <builtins.h>"; then
+    printf "%s\n" "#define HAVE___BUILTIN_EXPECT 2" >>confdefs.h
+
+  fi
+
+
+
+    if test "$with_libsigsegv" = yes; then
+    if test "$gl_cv_lib_sigsegv" = yes; then
+      LIBCSTACK=$LIBSIGSEGV
+
+      LTLIBCSTACK=$LTLIBSIGSEGV
+
+    fi
+  fi
+
+
+
+
+  if test $REPLACE_CALLOC = 0; then
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether calloc (0, n) and calloc (n, 0) return nonnull" >&5
+printf %s "checking whether calloc (0, n) and calloc (n, 0) return nonnull... " >&6; }
+if test ${ac_cv_func_calloc_0_nonnull+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test $cross_compiling != yes; then
+       ac_cv_func_calloc_0_nonnull=yes
+       if test "$cross_compiling" = yes
+then :
+  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot run test program while cross compiling
+See \`config.log' for more details" "$LINENO" 5; }
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+int
+main (void)
+{
+int result = 0;
+              char * volatile p = calloc (0, 0);
+              if (!p)
+                result |= 1;
+              free (p);
+              return result;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+
+else $as_nop
+  ac_cv_func_calloc_0_nonnull=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+     else
+       case "$host_os" in
+                        # Guess yes on glibc systems.
+         *-gnu* | gnu*) ac_cv_func_calloc_0_nonnull="guessing yes" ;;
+                        # Guess yes on musl systems.
+         *-musl*)       ac_cv_func_calloc_0_nonnull="guessing yes" ;;
+                        # Guess yes on native Windows.
+         mingw*)        ac_cv_func_calloc_0_nonnull="guessing yes" ;;
+                        # If we don't know, obey --enable-cross-guesses.
+         *)             ac_cv_func_calloc_0_nonnull="$gl_cross_guess_normal" ;;
+       esac
+     fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_calloc_0_nonnull" >&5
+printf "%s\n" "$ac_cv_func_calloc_0_nonnull" >&6; }
+  case $ac_cv_func_calloc_0_nonnull in #(
+  *yes) :
+     ;; #(
+  *) :
+    REPLACE_CALLOC=1 ;;
+esac
+
+  fi
+
+  if test $REPLACE_CALLOC = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS calloc.$ac_objext"
+
+  fi
+
+
+
+  if test $REPLACE_MALLOC = 1; then
+    REPLACE_CALLOC=1
+  fi
+
+  if test $REPLACE_CALLOC = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS calloc.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_CALLOC_POSIX=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_CALLOC_POSIX 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_CHDIR=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_CHDIR 1" >>confdefs.h
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether this system supports file names of any length" >&5
+printf %s "checking whether this system supports file names of any length... " >&6; }
+if test ${gl_cv_have_unlimited_file_name_length+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Arrange to define PATH_MAX, like "pathmax.h" does. */
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+#include <limits.h>
+#if defined HAVE_SYS_PARAM_H && !defined PATH_MAX && !defined MAXPATHLEN
+# include <sys/param.h>
+#endif
+#if !defined PATH_MAX && defined MAXPATHLEN
+# define PATH_MAX MAXPATHLEN
+#endif
+#ifdef __hpux
+# undef PATH_MAX
+# define PATH_MAX 1024
+#endif
+#if defined _WIN32 && ! defined __CYGWIN__
+# undef PATH_MAX
+# define PATH_MAX 260
+#endif
+
+#ifdef PATH_MAX
+have_arbitrary_file_name_length_limit
+#endif
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "have_arbitrary_file_name_length_limit" >/dev/null 2>&1
+then :
+  gl_cv_have_unlimited_file_name_length=no
+else $as_nop
+  gl_cv_have_unlimited_file_name_length=yes
+fi
+rm -rf conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_have_unlimited_file_name_length" >&5
+printf "%s\n" "$gl_cv_have_unlimited_file_name_length" >&6; }
+
+  if test $gl_cv_have_unlimited_file_name_length = no; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS chdir-long.$ac_objext"
+
+    :
+  fi
+
+
+printf "%s\n" "#define GNULIB_TEST_CLOEXEC 1" >>confdefs.h
+
+
+
+
+
+
+    if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+      REPLACE_CLOSE=1
+    fi
+
+
+
+
+
+
+  if test $ac_cv_header_sys_socket_h != yes; then
+                    ac_fn_c_check_header_compile "$LINENO" "winsock2.h" "ac_cv_header_winsock2_h" "$ac_includes_default"
+if test "x$ac_cv_header_winsock2_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_WINSOCK2_H 1" >>confdefs.h
+
+fi
+
+  fi
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    HAVE_WINSOCK2_H=1
+    UNISTD_H_HAVE_WINSOCK2_H=1
+    SYS_IOCTL_H_HAVE_WINSOCK2_H=1
+  else
+    HAVE_WINSOCK2_H=0
+  fi
+
+
+    if test $UNISTD_H_HAVE_WINSOCK2_H = 1; then
+                        REPLACE_CLOSE=1
+    fi
+
+
+    if test $REPLACE_CLOSE = 0; then
+
+
+
+  if test $ac_cv_func_fchdir = no; then
+    HAVE_FCHDIR=0
+  fi
+
+      if test $HAVE_FCHDIR = 0; then
+        REPLACE_CLOSE=1
+      fi
+    fi
+
+
+  if test $REPLACE_CLOSE = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS close.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_CLOSE=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_CLOSE 1" >>confdefs.h
+
+
+
+
+
+printf "%s\n" "#define GNULIB_CLOSE_STREAM 1" >>confdefs.h
+
+
+
+
+
+  ac_fn_c_check_func "$LINENO" "closedir" "ac_cv_func_closedir"
+if test "x$ac_cv_func_closedir" = xyes
+then :
+  printf "%s\n" "#define HAVE_CLOSEDIR 1" >>confdefs.h
+
+fi
+
+  if test $ac_cv_func_closedir = no; then
+    HAVE_CLOSEDIR=0
+  fi
+
+
+
+
+  if test $ac_cv_func_fchdir = no; then
+    HAVE_FCHDIR=0
+  fi
+
+    if test $HAVE_FCHDIR = 0; then
+      if test $HAVE_CLOSEDIR = 1; then
+        REPLACE_CLOSEDIR=1
+      fi
+    fi
+
+    case $host_os,$HAVE_CLOSEDIR in
+    os2*,1)
+      REPLACE_CLOSEDIR=1;;
+  esac
+
+  if test $HAVE_CLOSEDIR = 0 || test $REPLACE_CLOSEDIR = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS closedir.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_CLOSEDIR=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_CLOSEDIR 1" >>confdefs.h
+
+
+
+
+  if test "x$lispdir" = x; then
+    lispdir='${datarootdir}/emacs/site-lisp'
+
+  fi
+    if test "x$runstatedir" = x; then
+    runstatedir='${localstatedir}/run'
+
+  fi
+
+      pkglibexecdir='${libexecdir}/${PACKAGE}'
+
+
+
+
+
+
+
+
+  :
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for d_ino member in directory struct" >&5
+printf %s "checking for d_ino member in directory struct... " >&6; }
+if test ${gl_cv_struct_dirent_d_ino+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                            # Guess yes on glibc systems with Linux kernel.
+              linux*-gnu*)  gl_cv_struct_dirent_d_ino="guessing yes" ;;
+                            # Guess yes on musl systems with Linux kernel.
+              linux*-musl*) gl_cv_struct_dirent_d_ino="guessing yes" ;;
+                            # Guess no on native Windows.
+              mingw*)       gl_cv_struct_dirent_d_ino="guessing no" ;;
+                            # If we don't know, obey --enable-cross-guesses.
+              *)            gl_cv_struct_dirent_d_ino="$gl_cross_guess_normal" ;;
+            esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+             #include <sys/stat.h>
+             #include <dirent.h>
+
+int
+main (void)
+{
+DIR *dp = opendir (".");
+             struct dirent *e;
+             struct stat st;
+             if (! dp)
+               return 1;
+             e = readdir (dp);
+             if (! e)
+               { closedir (dp); return 2; }
+             if (lstat (e->d_name, &st) != 0)
+               { closedir (dp); return 3; }
+             if (e->d_ino != st.st_ino)
+               { closedir (dp); return 4; }
+             closedir (dp);
+             return 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_struct_dirent_d_ino=yes
+else $as_nop
+  gl_cv_struct_dirent_d_ino=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_struct_dirent_d_ino" >&5
+printf "%s\n" "$gl_cv_struct_dirent_d_ino" >&6; }
+   case "$gl_cv_struct_dirent_d_ino" in
+     *yes)
+
+printf "%s\n" "#define D_INO_IN_DIRENT 1" >>confdefs.h
+
+       ;;
+   esac
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for d_type member in directory struct" >&5
+printf %s "checking for d_type member in directory struct... " >&6; }
+if test ${gl_cv_struct_dirent_d_type+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <sys/types.h>
+#include <dirent.h>
+
+int
+main (void)
+{
+struct dirent dp; dp.d_type = 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_struct_dirent_d_type=yes
+else $as_nop
+  gl_cv_struct_dirent_d_type=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_struct_dirent_d_type" >&5
+printf "%s\n" "$gl_cv_struct_dirent_d_type" >&6; }
+   if test $gl_cv_struct_dirent_d_type = yes; then
+
+printf "%s\n" "#define HAVE_STRUCT_DIRENT_D_TYPE 1" >>confdefs.h
+
+   fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  ac_fn_c_check_func "$LINENO" "dirfd" "ac_cv_func_dirfd"
+if test "x$ac_cv_func_dirfd" = xyes
+then :
+  printf "%s\n" "#define HAVE_DIRFD 1" >>confdefs.h
+
+fi
+
+  ac_fn_check_decl "$LINENO" "dirfd" "ac_cv_have_decl_dirfd" "#include <sys/types.h>
+      #include <dirent.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_dirfd" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_DIRFD $ac_have_decl" >>confdefs.h
+
+  if test $ac_cv_have_decl_dirfd = no; then
+    HAVE_DECL_DIRFD=0
+  fi
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether dirfd is a macro" >&5
+printf %s "checking whether dirfd is a macro... " >&6; }
+if test ${gl_cv_func_dirfd_macro+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <sys/types.h>
+#include <dirent.h>
+#ifdef dirfd
+ dirent_header_defines_dirfd
+#endif
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "dirent_header_defines_dirfd" >/dev/null 2>&1
+then :
+  gl_cv_func_dirfd_macro=yes
+else $as_nop
+  gl_cv_func_dirfd_macro=no
+fi
+rm -rf conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_dirfd_macro" >&5
+printf "%s\n" "$gl_cv_func_dirfd_macro" >&6; }
+
+  # Use the replacement if we have no function or macro with that name,
+  # or if OS/2 kLIBC whose dirfd() does not work.
+  # Replace only if the system declares dirfd already.
+  case $ac_cv_func_dirfd,$gl_cv_func_dirfd_macro,$host_os,$ac_cv_have_decl_dirfd in
+    no,no,*,yes | *,*,os2*,yes)
+      REPLACE_DIRFD=1
+
+printf "%s\n" "#define REPLACE_DIRFD 1" >>confdefs.h
+;;
+  esac
+
+  if test $ac_cv_func_dirfd = no && test $gl_cv_func_dirfd_macro = no \
+     || test $REPLACE_DIRFD = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS dirfd.$ac_objext"
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to get the file descriptor associated with an open DIR*" >&5
+printf %s "checking how to get the file descriptor associated with an open DIR*... " >&6; }
+if test ${gl_cv_sys_dir_fd_member_name+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      dirfd_save_CFLAGS=$CFLAGS
+      for ac_expr in d_fd dd_fd; do
+
+        CFLAGS="$CFLAGS -DDIR_FD_MEMBER_NAME=$ac_expr"
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+           #include <sys/types.h>
+           #include <dirent.h>
+int
+main (void)
+{
+DIR *dir_p = opendir("."); (void) dir_p->DIR_FD_MEMBER_NAME;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  dir_fd_found=yes
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+        CFLAGS=$dirfd_save_CFLAGS
+        test "$dir_fd_found" = yes && break
+      done
+      test "$dir_fd_found" = yes || ac_expr=no_such_member
+
+      gl_cv_sys_dir_fd_member_name=$ac_expr
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_sys_dir_fd_member_name" >&5
+printf "%s\n" "$gl_cv_sys_dir_fd_member_name" >&6; }
+  if test $gl_cv_sys_dir_fd_member_name != no_such_member; then
+
+printf "%s\n" "#define DIR_FD_MEMBER_NAME $gl_cv_sys_dir_fd_member_name" >>confdefs.h
+
+  fi
+
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_DIRFD=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_DIRFD 1" >>confdefs.h
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether // is distinct from /" >&5
+printf %s "checking whether // is distinct from /... " >&6; }
+if test ${gl_cv_double_slash_root+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+   if test x"$cross_compiling" = xyes ; then
+        # When cross-compiling, there is no way to tell whether // is special
+        # short of a list of hosts.  However, the only known hosts to date
+        # that have a distinct // are Apollo DomainOS (too old to port to),
+        # Cygwin, and z/OS.  If anyone knows of another system for which // has
+        # special semantics and is distinct from /, please report it to
+        # <bug-gnulib@gnu.org>.
+        case $host in
+          *-cygwin | i370-ibm-openedition)
+            gl_cv_double_slash_root=yes ;;
+          *)
+            # Be optimistic and assume that / and // are the same when we
+            # don't know.
+            gl_cv_double_slash_root='unknown, assuming no' ;;
+        esac
+      else
+        set x `ls -di / // 2>/dev/null`
+        if test "$2" = "$4" && wc //dev/null >/dev/null 2>&1; then
+          gl_cv_double_slash_root=no
+        else
+          gl_cv_double_slash_root=yes
+        fi
+      fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_double_slash_root" >&5
+printf "%s\n" "$gl_cv_double_slash_root" >&6; }
+  if test "$gl_cv_double_slash_root" = yes; then
+
+printf "%s\n" "#define DOUBLE_SLASH_IS_DISTINCT_ROOT 1" >>confdefs.h
+
+  fi
+
+
+
+
+
+    if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+      REPLACE_DUP=1
+    fi
+
+
+
+
+
+  if test $ac_cv_func_fchdir = no; then
+    HAVE_FCHDIR=0
+  fi
+
+    if test $HAVE_FCHDIR = 0; then
+      REPLACE_DUP=1
+    fi
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether dup works" >&5
+printf %s "checking whether dup works... " >&6; }
+if test ${gl_cv_func_dup_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                 # Guess no on native Windows.
+         mingw*) gl_cv_func_dup_works="guessing no" ;;
+         *)      gl_cv_func_dup_works="guessing yes" ;;
+       esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <unistd.h>
+                         #include <fcntl.h>
+                         #include <errno.h>
+
+
+$gl_mda_defines
+
+int
+main (void)
+{
+/* On OS/2 kLIBC, dup does not work on a directory fd.  */
+           int fd = open (".", O_RDONLY);
+           return fd < 0 ? 1 : dup (fd) < 0 ? 2 : 0;
+
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_dup_works=yes
+else $as_nop
+  gl_cv_func_dup_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_dup_works" >&5
+printf "%s\n" "$gl_cv_func_dup_works" >&6; }
+  case "$gl_cv_func_dup_works" in
+    *yes) ;;
+    *)
+      REPLACE_DUP=1
+      ;;
+  esac
+
+  if test $REPLACE_DUP = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS dup.$ac_objext"
+
+    :
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_DUP=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_DUP 1" >>confdefs.h
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether dup2 works" >&5
+printf %s "checking whether dup2 works... " >&6; }
+if test ${gl_cv_func_dup2_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+         mingw*) # on this platform, dup2 always returns 0 for success
+           gl_cv_func_dup2_works="guessing no" ;;
+         cygwin*) # on cygwin 1.5.x, dup2(1,1) returns 0
+           gl_cv_func_dup2_works="guessing no" ;;
+         aix* | freebsd*)
+                 # on AIX 7.1 and FreeBSD 6.1, dup2 (1,toobig) gives EMFILE,
+                 # not EBADF.
+           gl_cv_func_dup2_works="guessing no" ;;
+         haiku*) # on Haiku alpha 2, dup2(1, 1) resets FD_CLOEXEC.
+           gl_cv_func_dup2_works="guessing no" ;;
+         *-android*) # implemented using dup3(), which fails if oldfd == newfd
+           gl_cv_func_dup2_works="guessing no" ;;
+         os2*) # on OS/2 kLIBC, dup2() does not work on a directory fd.
+           gl_cv_func_dup2_works="guessing no" ;;
+         *) gl_cv_func_dup2_works="guessing yes" ;;
+       esac
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+       #include <errno.h>
+           #include <fcntl.h>
+           #include <limits.h>
+           #include <sys/resource.h>
+           #include <unistd.h>
+
+
+$gl_mda_defines
+
+           #ifndef RLIM_SAVED_CUR
+           # define RLIM_SAVED_CUR RLIM_INFINITY
+           #endif
+           #ifndef RLIM_SAVED_MAX
+           # define RLIM_SAVED_MAX RLIM_INFINITY
+           #endif
+
+int
+main (void)
+{
+int result = 0;
+           int bad_fd = INT_MAX;
+           struct rlimit rlim;
+           if (getrlimit (RLIMIT_NOFILE, &rlim) == 0
+               && 0 <= rlim.rlim_cur && rlim.rlim_cur <= INT_MAX
+               && rlim.rlim_cur != RLIM_INFINITY
+               && rlim.rlim_cur != RLIM_SAVED_MAX
+               && rlim.rlim_cur != RLIM_SAVED_CUR)
+             bad_fd = rlim.rlim_cur;
+           #ifdef FD_CLOEXEC
+             if (fcntl (1, F_SETFD, FD_CLOEXEC) == -1)
+               result |= 1;
+           #endif
+           if (dup2 (1, 1) != 1)
+             result |= 2;
+           #ifdef FD_CLOEXEC
+             if (fcntl (1, F_GETFD) != FD_CLOEXEC)
+               result |= 4;
+           #endif
+           close (0);
+           if (dup2 (0, 0) != -1)
+             result |= 8;
+           /* Many gnulib modules require POSIX conformance of EBADF.  */
+           if (dup2 (2, bad_fd) == -1 && errno != EBADF)
+             result |= 16;
+           /* Flush out some cygwin core dumps.  */
+           if (dup2 (2, -1) != -1 || errno != EBADF)
+             result |= 32;
+           dup2 (2, 255);
+           dup2 (2, 256);
+           /* On OS/2 kLIBC, dup2() does not work on a directory fd.  */
+           {
+             int fd = open (".", O_RDONLY);
+             if (fd == -1)
+               result |= 64;
+             else if (dup2 (fd, fd + 1) == -1)
+               result |= 128;
+             close (fd);
+           }
+           return result;
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_dup2_works=yes
+else $as_nop
+  gl_cv_func_dup2_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_dup2_works" >&5
+printf "%s\n" "$gl_cv_func_dup2_works" >&6; }
+  case "$gl_cv_func_dup2_works" in
+    *yes) ;;
+    *)
+      REPLACE_DUP2=1
+      ac_fn_c_check_func "$LINENO" "setdtablesize" "ac_cv_func_setdtablesize"
+if test "x$ac_cv_func_setdtablesize" = xyes
+then :
+  printf "%s\n" "#define HAVE_SETDTABLESIZE 1" >>confdefs.h
+
+fi
+
+      ;;
+  esac
+
+
+
+
+  if test $ac_cv_func_fchdir = no; then
+    HAVE_FCHDIR=0
+  fi
+
+    if test $HAVE_FCHDIR = 0; then
+      REPLACE_DUP2=1
+    fi
+
+
+  if test $REPLACE_DUP2 = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS dup2.$ac_objext"
+
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_DUP2=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_DUP2 1" >>confdefs.h
+
+
+
+
+
+
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for error_at_line" >&5
+printf %s "checking for error_at_line... " >&6; }
+if test ${ac_cv_lib_error_at_line+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <error.h>
+int
+main (void)
+{
+error_at_line (0, 0, "", 0, "an error occurred");
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_error_at_line=yes
+else $as_nop
+  ac_cv_lib_error_at_line=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_error_at_line" >&5
+printf "%s\n" "$ac_cv_lib_error_at_line" >&6; }
+
+  if test $ac_cv_lib_error_at_line = no; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS error.$ac_objext"
+
+
+
+  :
+
+  fi
+
+
+  XGETTEXT_EXTRA_OPTIONS="$XGETTEXT_EXTRA_OPTIONS --flag=error:3:c-format"
+
+
+
+  XGETTEXT_EXTRA_OPTIONS="$XGETTEXT_EXTRA_OPTIONS --flag=error_at_line:5:c-format"
+
+
+
+
+
+
+
+  if test $ac_cv_have_decl_fchdir = no; then
+    HAVE_DECL_FCHDIR=0
+  fi
+
+
+  if test $HAVE_FCHDIR = 0; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS fchdir.$ac_objext"
+
+    :
+
+printf "%s\n" "#define REPLACE_FCHDIR 1" >>confdefs.h
+
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether open can visit directories" >&5
+printf %s "checking whether open can visit directories... " >&6; }
+if test ${gl_cv_func_open_directory_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                             # Guess yes on Linux systems.
+            linux-* | linux) gl_cv_func_open_directory_works="guessing yes" ;;
+                             # Guess yes on glibc systems.
+            *-gnu* | gnu*)   gl_cv_func_open_directory_works="guessing yes" ;;
+                             # Guess no on native Windows.
+            mingw*)          gl_cv_func_open_directory_works="guessing no" ;;
+                             # If we don't know, obey --enable-cross-guesses.
+            *)               gl_cv_func_open_directory_works="$gl_cross_guess_normal" ;;
+          esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <fcntl.h>
+
+
+$gl_mda_defines
+
+int
+main (void)
+{
+return open(".", O_RDONLY) < 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_open_directory_works=yes
+else $as_nop
+  gl_cv_func_open_directory_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_open_directory_works" >&5
+printf "%s\n" "$gl_cv_func_open_directory_works" >&6; }
+    case "$gl_cv_func_open_directory_works" in
+      *yes) ;;
+      *)
+
+printf "%s\n" "#define REPLACE_OPEN_DIRECTORY 1" >>confdefs.h
+
+        ;;
+    esac
+  fi
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_FCHDIR=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FCHDIR 1" >>confdefs.h
+
+
+
+
+
+
+
+
+  if test $ac_cv_func_fcntl = no; then
+
+
+
+  if test $ac_cv_func_fcntl = no; then
+    HAVE_FCNTL=0
+  else
+    REPLACE_FCNTL=1
+  fi
+
+  else
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether fcntl handles F_DUPFD correctly" >&5
+printf %s "checking whether fcntl handles F_DUPFD correctly... " >&6; }
+if test ${gl_cv_func_fcntl_f_dupfd_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case $host_os in
+            aix* | cygwin* | haiku*)
+               gl_cv_func_fcntl_f_dupfd_works="guessing no" ;;
+            *) gl_cv_func_fcntl_f_dupfd_works="guessing yes" ;;
+          esac
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <errno.h>
+              #include <fcntl.h>
+              #include <limits.h>
+              #include <sys/resource.h>
+              #include <unistd.h>
+
+
+$gl_mda_defines
+
+              #ifndef RLIM_SAVED_CUR
+              # define RLIM_SAVED_CUR RLIM_INFINITY
+              #endif
+              #ifndef RLIM_SAVED_MAX
+              # define RLIM_SAVED_MAX RLIM_INFINITY
+              #endif
+
+int
+main (void)
+{
+int result = 0;
+              int bad_fd = INT_MAX;
+              struct rlimit rlim;
+              if (getrlimit (RLIMIT_NOFILE, &rlim) == 0
+                  && 0 <= rlim.rlim_cur && rlim.rlim_cur <= INT_MAX
+                  && rlim.rlim_cur != RLIM_INFINITY
+                  && rlim.rlim_cur != RLIM_SAVED_MAX
+                  && rlim.rlim_cur != RLIM_SAVED_CUR)
+                bad_fd = rlim.rlim_cur;
+              if (fcntl (0, F_DUPFD, -1) != -1) result |= 1;
+              if (errno != EINVAL) result |= 2;
+              if (fcntl (0, F_DUPFD, bad_fd) != -1) result |= 4;
+              if (errno != EINVAL) result |= 8;
+              /* On OS/2 kLIBC, F_DUPFD does not work on a directory fd */
+              {
+                int fd;
+                fd = open (".", O_RDONLY);
+                if (fd == -1)
+                  result |= 16;
+                else if (fcntl (fd, F_DUPFD, STDERR_FILENO + 1) == -1)
+                  result |= 32;
+
+                close (fd);
+              }
+              return result;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_fcntl_f_dupfd_works=yes
+else $as_nop
+  gl_cv_func_fcntl_f_dupfd_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_fcntl_f_dupfd_works" >&5
+printf "%s\n" "$gl_cv_func_fcntl_f_dupfd_works" >&6; }
+    case $gl_cv_func_fcntl_f_dupfd_works in
+      *yes) ;;
+      *)
+
+
+  if test $ac_cv_func_fcntl = no; then
+    HAVE_FCNTL=0
+  else
+    REPLACE_FCNTL=1
+  fi
+
+
+printf "%s\n" "#define FCNTL_DUPFD_BUGGY 1" >>confdefs.h
+ ;;
+    esac
+
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether fcntl understands F_DUPFD_CLOEXEC" >&5
+printf %s "checking whether fcntl understands F_DUPFD_CLOEXEC... " >&6; }
+if test ${gl_cv_func_fcntl_f_dupfd_cloexec+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                     # Guess no on NetBSD.
+            netbsd*) gl_cv_func_fcntl_f_dupfd_cloexec="guessing no" ;;
+            *)       gl_cv_func_fcntl_f_dupfd_cloexec="$gl_cross_guess_normal" ;;
+          esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <fcntl.h>
+              #include <unistd.h>
+              int main (int argc, char *argv[])
+              {
+                if (argc == 1)
+                  /* parent process */
+                  {
+                    if (fcntl (1, F_DUPFD_CLOEXEC, 10) < 0)
+                      return 1;
+                    return execl ("./conftest", "./conftest", "child", NULL);
+                  }
+                else
+                  /* child process */
+                  return (fcntl (10, F_GETFL) < 0 ? 0 : 42);
+              }
+
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#ifdef __linux__
+/* The Linux kernel only added F_DUPFD_CLOEXEC in 2.6.24, so we always replace
+   it to support the semantics on older kernels that failed with EINVAL.  */
+choke me
+#endif
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_func_fcntl_f_dupfd_cloexec=yes
+else $as_nop
+  gl_cv_func_fcntl_f_dupfd_cloexec="needs runtime check"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+else $as_nop
+  gl_cv_func_fcntl_f_dupfd_cloexec=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_fcntl_f_dupfd_cloexec" >&5
+printf "%s\n" "$gl_cv_func_fcntl_f_dupfd_cloexec" >&6; }
+    case "$gl_cv_func_fcntl_f_dupfd_cloexec" in
+      *yes) ;;
+      *)
+
+
+  if test $ac_cv_func_fcntl = no; then
+    HAVE_FCNTL=0
+  else
+    REPLACE_FCNTL=1
+  fi
+
+                        ;;
+    esac
+  fi
+
+
+
+
+  if test $ac_cv_func_fchdir = no; then
+    HAVE_FCHDIR=0
+  fi
+
+    if test $HAVE_FCHDIR = 0; then
+
+
+
+  if test $ac_cv_func_fcntl = no; then
+    HAVE_FCNTL=0
+  else
+    REPLACE_FCNTL=1
+  fi
+
+    fi
+
+
+  if test $HAVE_FCNTL = 0 || test $REPLACE_FCNTL = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS fcntl.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_FCNTL=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FCNTL 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+printf "%s\n" "#define GNULIB_FCNTL_SAFER 1" >>confdefs.h
+
+
+
+
+printf "%s\n" "#define GNULIB_FD_SAFER_FLAG 1" >>confdefs.h
+
+
+
+
+
+
+
+    ac_fn_check_decl "$LINENO" "fdopendir" "ac_cv_have_decl_fdopendir" "
+#include <dirent.h>
+
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_fdopendir" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_FDOPENDIR $ac_have_decl" >>confdefs.h
+if test $ac_have_decl = 1
+then :
+
+else $as_nop
+  HAVE_DECL_FDOPENDIR=0
+fi
+
+
+  if test $ac_cv_func_fdopendir = no; then
+    HAVE_FDOPENDIR=0
+  else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether fdopendir works" >&5
+printf %s "checking whether fdopendir works... " >&6; }
+if test ${gl_cv_func_fdopendir_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                     # Guess yes on glibc systems.
+            *-gnu*)  gl_cv_func_fdopendir_works="guessing yes" ;;
+                     # Guess yes on musl systems.
+            *-musl*) gl_cv_func_fdopendir_works="guessing yes" ;;
+                     # If we don't know, obey --enable-cross-guesses.
+            *)       gl_cv_func_fdopendir_works="$gl_cross_guess_normal" ;;
+          esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <dirent.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+
+$gl_mda_defines
+
+#if !HAVE_DECL_FDOPENDIR
+extern
+# ifdef __cplusplus
+"C"
+# endif
+DIR *fdopendir (int);
+#endif
+
+int
+main (void)
+{
+int result = 0;
+              int fd = open ("conftest.c", O_RDONLY);
+              if (fd < 0) result |= 1;
+              if (fdopendir (fd)) result |= 2;
+              if (close (fd)) result |= 4;
+              return result;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_fdopendir_works=yes
+else $as_nop
+  gl_cv_func_fdopendir_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_fdopendir_works" >&5
+printf "%s\n" "$gl_cv_func_fdopendir_works" >&6; }
+    case "$gl_cv_func_fdopendir_works" in
+      *yes) ;;
+      *)
+        REPLACE_FDOPENDIR=1
+        ;;
+    esac
+  fi
+
+  if test $HAVE_FDOPENDIR = 0 || test $REPLACE_FDOPENDIR = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS fdopendir.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_FDOPENDIR=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FDOPENDIR 1" >>confdefs.h
+
+
+
+
+
+printf "%s\n" "#define GNULIB_FDOPENDIR 1" >>confdefs.h
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for flexible array member" >&5
+printf %s "checking for flexible array member... " >&6; }
+if test ${ac_cv_c_flexmember+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdlib.h>
+            #include <stdio.h>
+            #include <stddef.h>
+            struct m { struct m *next, **list; char name[]; };
+            struct s { struct s *p; struct m *m; int n; double d[]; };
+int
+main (void)
+{
+int m = getchar ();
+            size_t nbytes = offsetof (struct s, d) + m * sizeof (double);
+            nbytes += sizeof (struct s) - 1;
+            nbytes -= nbytes % sizeof (struct s);
+            struct s *p = malloc (nbytes);
+            p->p = p;
+            p->m = NULL;
+            p->d[0] = 0.0;
+            return p->d != (double *) NULL;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_c_flexmember=yes
+else $as_nop
+  ac_cv_c_flexmember=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_flexmember" >&5
+printf "%s\n" "$ac_cv_c_flexmember" >&6; }
+  if test $ac_cv_c_flexmember = yes; then
+
+printf "%s\n" "#define FLEXIBLE_ARRAY_MEMBER /**/" >>confdefs.h
+
+  else
+    printf "%s\n" "#define FLEXIBLE_ARRAY_MEMBER 1" >>confdefs.h
+
+  fi
+
+
+
+
+
+     gl_fnmatch_required_lowercase=`
+    echo $gl_fnmatch_required | LC_ALL=C tr '[A-Z]' '[a-z]'
+  `
+
+  if test $ac_cv_func_fnmatch = no; then
+    HAVE_FNMATCH=0
+  else
+    gl_fnmatch_cache_var="gl_cv_func_fnmatch_${gl_fnmatch_required_lowercase}"
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working $gl_fnmatch_required fnmatch" >&5
+printf %s "checking for working $gl_fnmatch_required fnmatch... " >&6; }
+if eval test \${$gl_fnmatch_cache_var+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+                                     if test $gl_fnmatch_required = GNU; then
+         gl_fnmatch_gnu_start=
+         gl_fnmatch_gnu_end=
+       else
+         gl_fnmatch_gnu_start='#if 0'
+         gl_fnmatch_gnu_end='#endif'
+       fi
+       if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                     # Guess yes on musl systems.
+            *-musl*) eval "$gl_fnmatch_cache_var=\"guessing yes\"" ;;
+                     # Guess no otherwise, even on glibc systems.
+            *)       eval "$gl_fnmatch_cache_var=\"guessing no\"" ;;
+          esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <fnmatch.h>
+              static int
+              y (char const *pattern, char const *string, int flags)
+              {
+                return fnmatch (pattern, string, flags) == 0;
+              }
+              static int
+              n (char const *pattern, char const *string, int flags)
+              {
+                return fnmatch (pattern, string, flags) == FNM_NOMATCH;
+              }
+
+int
+main (void)
+{
+char const *Apat = 'A' < '\\\\' ? "[A-\\\\\\\\]" : "[\\\\\\\\-A]";
+              char const *apat = 'a' < '\\\\' ? "[a-\\\\\\\\]" : "[\\\\\\\\-a]";
+              static char const A_1[] = { 'A' - 1, 0 };
+              static char const A01[] = { 'A' + 1, 0 };
+              static char const a_1[] = { 'a' - 1, 0 };
+              static char const a01[] = { 'a' + 1, 0 };
+              static char const bs_1[] = { '\\\\' - 1, 0 };
+              static char const bs01[] = { '\\\\' + 1, 0 };
+              int result = 0;
+              if (!n ("a*", "", 0))
+                return 1;
+              if (!y ("a*", "abc", 0))
+                return 1;
+              if (!y ("[/b", "[/b", 0)) /*"]]"*/ /* glibc Bugzilla bug 12378 */
+                return 1;
+              if (!n ("d*/*1", "d/s/1", FNM_PATHNAME))
+                return 2;
+              if (!y ("a\\\\bc", "abc", 0))
+                return 3;
+              if (!n ("a\\\\bc", "abc", FNM_NOESCAPE))
+                return 3;
+              if (!y ("*x", ".x", 0))
+                return 4;
+              if (!n ("*x", ".x", FNM_PERIOD))
+                return 4;
+              if (!y (Apat, "\\\\", 0))
+                return 5;
+              if (!y (Apat, "A", 0))
+                return 5;
+              if (!y (apat, "\\\\", 0))
+                return 5;
+              if (!y (apat, "a", 0))
+                return 5;
+              if (!(n (Apat, A_1, 0) == ('A' < '\\\\')))
+                return 5;
+              if (!(n (apat, a_1, 0) == ('a' < '\\\\')))
+                return 5;
+              if (!(y (Apat, A01, 0) == ('A' < '\\\\')))
+                return 5;
+              if (!(y (apat, a01, 0) == ('a' < '\\\\')))
+                return 5;
+              if (!(y (Apat, bs_1, 0) == ('A' < '\\\\')))
+                return 5;
+              if (!(y (apat, bs_1, 0) == ('a' < '\\\\')))
+                return 5;
+              if (!(n (Apat, bs01, 0) == ('A' < '\\\\')))
+                return 5;
+              if (!(n (apat, bs01, 0) == ('a' < '\\\\')))
+                return 5;
+              $gl_fnmatch_gnu_start
+              if (!y ("xxXX", "xXxX", FNM_CASEFOLD))
+                result |= 8;
+              if (!y ("a++(x|yy)b", "a+xyyyyxb", FNM_EXTMATCH))
+                result |= 16;
+              if (!n ("d*/*1", "d/s/1", FNM_FILE_NAME))
+                result |= 32;
+              if (!y ("*", "x", FNM_FILE_NAME | FNM_LEADING_DIR))
+                result |= 64;
+              if (!y ("x*", "x/y/z", FNM_FILE_NAME | FNM_LEADING_DIR))
+                result |= 64;
+              if (!y ("*c*", "c/x", FNM_FILE_NAME | FNM_LEADING_DIR))
+                result |= 64;
+              $gl_fnmatch_gnu_end
+              return result;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  eval "$gl_fnmatch_cache_var=yes"
+else $as_nop
+  eval "$gl_fnmatch_cache_var=no"
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+eval ac_res=\$$gl_fnmatch_cache_var
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+    eval "gl_fnmatch_result=\"\$$gl_fnmatch_cache_var\""
+    case "$gl_fnmatch_result" in
+      *yes) ;;
+      *) REPLACE_FNMATCH=1 ;;
+    esac
+  fi
+  if test $HAVE_FNMATCH = 0 || test $REPLACE_FNMATCH = 1; then
+
+
+
+
+
+
+  FNMATCH_H='fnmatch.h'
+   if test -n "$FNMATCH_H"; then
+  GL_GENERATE_FNMATCH_H_TRUE=
+  GL_GENERATE_FNMATCH_H_FALSE='#'
+else
+  GL_GENERATE_FNMATCH_H_TRUE='#'
+  GL_GENERATE_FNMATCH_H_FALSE=
+fi
+
+
+  fi
+
+  if test $HAVE_FNMATCH = 0 || test $REPLACE_FNMATCH = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS fnmatch.$ac_objext"
+
+
+
+
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_FNMATCH=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FNMATCH 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+  case "$host_os" in
+    mingw* | pw*)
+            REPLACE_FOPEN=1
+            gl_cv_func_fopen_slash="guessing no"
+      ;;
+    *)
+                  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether fopen recognizes a trailing slash" >&5
+printf %s "checking whether fopen recognizes a trailing slash... " >&6; }
+if test ${gl_cv_func_fopen_slash+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+          if test "$cross_compiling" = yes
+then :
+
+             case "$host_os" in
+               aix* | hpux* | solaris2.[0-9] | solaris2.[0-9].*)
+                 gl_cv_func_fopen_slash="guessing no" ;;
+               *)
+                 gl_cv_func_fopen_slash="guessing yes" ;;
+             esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stddef.h>
+#include <stdio.h>
+int main ()
+{
+  FILE *fp = fopen ("conftest.sl/", "w");
+  int result = (fp != NULL);
+  if (fp != NULL)
+    fclose (fp);
+  return result;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_fopen_slash=yes
+else $as_nop
+  gl_cv_func_fopen_slash=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+          rm -f conftest.sl
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_fopen_slash" >&5
+printf "%s\n" "$gl_cv_func_fopen_slash" >&6; }
+      ;;
+  esac
+  case "$gl_cv_func_fopen_slash" in
+    *no)
+
+printf "%s\n" "#define FOPEN_TRAILING_SLASH_BUG 1" >>confdefs.h
+
+      REPLACE_FOPEN=1
+      ;;
+  esac
+
+  if test $REPLACE_FOPEN = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS fopen.$ac_objext"
+
+    :
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_FOPEN=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FOPEN 1" >>confdefs.h
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether fopen supports the mode character 'x'" >&5
+printf %s "checking whether fopen supports the mode character 'x'... " >&6; }
+if test ${gl_cv_func_fopen_mode_x+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  rm -f conftest.x
+     if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+          # Guess yes on glibc and musl systems.
+          linux*-gnu* | gnu* | kfreebsd*-gnu | *-musl*)
+            gl_cv_func_fopen_mode_x="guessing yes" ;;
+          # If we don't know, obey --enable-cross-guesses.
+          *)
+            gl_cv_func_fopen_mode_x="$gl_cross_guess_normal" ;;
+        esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdio.h>
+#include <errno.h>
+int main ()
+{
+  FILE *fp;
+  fp = fopen ("conftest.x", "w");
+  fclose (fp);
+  fp = fopen ("conftest.x", "wx");
+  if (fp != NULL)
+    /* 'x' ignored */
+    return 1;
+  else if (errno == EEXIST)
+    return 0;
+  else
+    /* 'x' rejected */
+    return 2;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_fopen_mode_x=yes
+else $as_nop
+  gl_cv_func_fopen_mode_x=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+     rm -f conftest.x
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_fopen_mode_x" >&5
+printf "%s\n" "$gl_cv_func_fopen_mode_x" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether fopen supports the mode character 'e'" >&5
+printf %s "checking whether fopen supports the mode character 'e'... " >&6; }
+if test ${gl_cv_func_fopen_mode_e+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  echo foo > conftest.x
+     if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+          # Guess yes on glibc and musl systems.
+          linux*-gnu* | gnu* | kfreebsd*-gnu | *-musl*)
+            gl_cv_func_fopen_mode_e="guessing yes" ;;
+          # Guess no on native Windows.
+          mingw*)
+            gl_cv_func_fopen_mode_e="guessing no" ;;
+          # If we don't know, obey --enable-cross-guesses.
+          *)
+            gl_cv_func_fopen_mode_e="$gl_cross_guess_normal" ;;
+        esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+
+
+$gl_mda_defines
+
+int main ()
+{
+  FILE *fp = fopen ("conftest.x", "re");
+  if (fp != NULL)
+    {
+      if (fcntl (fileno (fp), F_GETFD) & FD_CLOEXEC)
+        return 0;
+      else
+        /* 'e' ignored */
+        return 1;
+    }
+  else
+    /* 'e' rejected */
+    return 2;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_fopen_mode_e=yes
+else $as_nop
+  gl_cv_func_fopen_mode_e=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+     rm -f conftest.x
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_fopen_mode_e" >&5
+printf "%s\n" "$gl_cv_func_fopen_mode_e" >&6; }
+  case "$gl_cv_func_fopen_mode_x" in
+    *no) REPLACE_FOPEN=1 ;;
+  esac
+  case "$gl_cv_func_fopen_mode_e" in
+    *no) REPLACE_FOPEN=1 ;;
+  esac
+
+  if test $REPLACE_FOPEN = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS fopen.$ac_objext"
+
+    :
+  fi
+
+
+printf "%s\n" "#define GNULIB_FOPEN_GNU 1" >>confdefs.h
+
+
+
+
+  fp_headers='
+    #include <stdio.h>
+    #if HAVE_STDIO_EXT_H
+    # include <stdio_ext.h>
+    #endif
+  '
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for __fpending" >&5
+printf %s "checking for __fpending... " >&6; }
+if test ${gl_cv_func___fpending+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$fp_headers
+int
+main (void)
+{
+return ! __fpending (stdin);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_func___fpending=yes
+else $as_nop
+  gl_cv_func___fpending=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func___fpending" >&5
+printf "%s\n" "$gl_cv_func___fpending" >&6; }
+  if test $gl_cv_func___fpending = yes; then
+    ac_fn_check_decl "$LINENO" "__fpending" "ac_cv_have_decl___fpending" "$fp_headers
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl___fpending" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL___FPENDING $ac_have_decl" >>confdefs.h
+
+  fi
+
+  if test $gl_cv_func___fpending = no; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS fpending.$ac_objext"
+
+  fi
+
+
+
+                          { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether free is known to preserve errno" >&5
+printf %s "checking whether free is known to preserve errno... " >&6; }
+if test ${gl_cv_func_free_preserves_errno+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdlib.h>
+
+int
+main (void)
+{
+#if 2 < __GLIBC__ + (33 <= __GLIBC_MINOR__)
+            #elif defined __OpenBSD__
+            #elif defined __sun
+            #else
+              #error "'free' is not known to preserve errno"
+            #endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_func_free_preserves_errno=yes
+else $as_nop
+  gl_cv_func_free_preserves_errno=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_free_preserves_errno" >&5
+printf "%s\n" "$gl_cv_func_free_preserves_errno" >&6; }
+
+  case $gl_cv_func_free_preserves_errno in
+   *yes)
+
+printf "%s\n" "#define HAVE_FREE_POSIX 1" >>confdefs.h
+
+    ;;
+   *) REPLACE_FREE=1 ;;
+  esac
+
+  if test $REPLACE_FREE = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS free.$ac_objext"
+
+    :
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_FREE_POSIX=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FREE_POSIX 1" >>confdefs.h
+
+
+
+
+
+
+
+  case "$host_os" in
+    mingw* | solaris*)
+                        REPLACE_FSTAT=1
+      ;;
+  esac
+
+
+
+
+
+  if test $ac_cv_func_fchdir = no; then
+    HAVE_FCHDIR=0
+  fi
+
+    if test $HAVE_FCHDIR = 0; then
+      case "$gl_cv_func_open_directory_works" in
+        *yes) ;;
+        *)
+          REPLACE_FSTAT=1
+          ;;
+      esac
+    fi
+
+
+  if test $REPLACE_FSTAT = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS fstat.$ac_objext"
+
+    case "$host_os" in
+      mingw*)
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS stat-w32.$ac_objext"
+
+        ;;
+    esac
+
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_FSTAT=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FSTAT 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+  if test $ac_cv_func_fstatat = no; then
+    HAVE_FSTATAT=0
+  else
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether fstatat (..., 0) works" >&5
+printf %s "checking whether fstatat (..., 0) works... " >&6; }
+if test ${gl_cv_func_fstatat_zero_flag+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+            aix*) gl_cv_func_fstatat_zero_flag="guessing no";;
+            *)    gl_cv_func_fstatat_zero_flag="guessing yes";;
+          esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+              #include <fcntl.h>
+              #include <sys/stat.h>
+              int
+              main (void)
+              {
+                struct stat a;
+                return fstatat (AT_FDCWD, ".", &a, 0) != 0;
+              }
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_fstatat_zero_flag=yes
+else $as_nop
+  gl_cv_func_fstatat_zero_flag=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_fstatat_zero_flag" >&5
+printf "%s\n" "$gl_cv_func_fstatat_zero_flag" >&6; }
+
+    case $gl_cv_func_fstatat_zero_flag+$gl_cv_func_lstat_dereferences_slashed_symlink in
+    *yes+*yes) ;;
+    *) REPLACE_FSTATAT=1 ;;
+    esac
+
+    case $host_os in
+      solaris*)
+        REPLACE_FSTATAT=1 ;;
+    esac
+
+    case $REPLACE_FSTATAT,$gl_cv_func_fstatat_zero_flag in
+      1,*yes)
+
+printf "%s\n" "#define HAVE_WORKING_FSTATAT_ZERO_FLAG 1" >>confdefs.h
+
+         ;;
+    esac
+  fi
+
+  if test $HAVE_FSTATAT = 0 || test $REPLACE_FSTATAT = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS fstatat.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_FSTATAT=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FSTATAT 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+  case $ac_cv_func_openat+$gl_cv_func_lstat_dereferences_slashed_symlink+$gl_cv_macro_O_CLOEXEC in
+  yes+*yes+yes)
+    ;;
+  yes+*)
+    # Solaris 10 lacks O_CLOEXEC.
+    # Solaris 9 has *at functions, but uniformly mishandles trailing
+    # slash in all of them.
+    REPLACE_OPENAT=1
+    ;;
+  *)
+    HAVE_OPENAT=0
+    ;;
+  esac
+
+
+
+      if test "$ac_cv_func_fstatfs,$ac_cv_header_sys_vfs_h" = yes,yes; then
+    ac_fn_c_check_member "$LINENO" "struct statfs" "f_type" "ac_cv_member_struct_statfs_f_type" "$ac_includes_default
+        #include <sys/vfs.h>
+
+"
+if test "x$ac_cv_member_struct_statfs_f_type" = xyes
+then :
+
+printf "%s\n" "#define HAVE_STRUCT_STATFS_F_TYPE 1" >>confdefs.h
+
+
+fi
+
+    if test "$ac_cv_member_struct_statfs_f_type" = yes; then
+      ac_fn_c_check_type "$LINENO" "__fsword_t" "ac_cv_type___fsword_t" "$ac_includes_default
+          #include <sys/vfs.h>
+
+"
+if test "x$ac_cv_type___fsword_t" = xyes
+then :
+
+printf "%s\n" "#define HAVE___FSWORD_T 1" >>confdefs.h
+
+
+fi
+
+    fi
+  fi
+
+  ac_fn_c_check_func "$LINENO" "fts_open" "ac_cv_func_fts_open"
+if test "x$ac_cv_func_fts_open" = xyes
+then :
+
+fi
+
+  if test $ac_cv_func_fts_open = yes; then
+
+printf "%s\n" "#define fts_open rpl_fts_open" >>confdefs.h
+
+
+printf "%s\n" "#define fts_close rpl_fts_close" >>confdefs.h
+
+
+printf "%s\n" "#define fts_read rpl_fts_read" >>confdefs.h
+
+
+printf "%s\n" "#define fts_set rpl_fts_set" >>confdefs.h
+
+
+printf "%s\n" "#define fts_children rpl_fts_children" >>confdefs.h
+
+
+printf "%s\n" "#define fts_cross_check rpl_fts_cross_check" >>confdefs.h
+
+  fi
+
+
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS fts.$ac_objext"
+
+
+
+
+
+
+  case $gl_cv_func_getcwd_null,$gl_cv_func_getcwd_posix_signature in
+  *yes,yes) ;;
+  *)
+        REPLACE_GETCWD=1
+    ;;
+  esac
+
+  if test $REPLACE_GETCWD = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS getcwd-lgpl.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_GETCWD=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_GETCWD 1" >>confdefs.h
+
+
+
+
+
+
+
+
+  if test $ac_cv_func_getdtablesize = yes &&
+     test $ac_cv_have_decl_getdtablesize = yes; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether getdtablesize works" >&5
+printf %s "checking whether getdtablesize works... " >&6; }
+if test ${gl_cv_func_getdtablesize_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+                                                   case "$host_os" in
+         vms*) gl_cv_func_getdtablesize_works="no (limitation)" ;;
+         *)
+                                                       if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                cygwin*) # on cygwin 1.5.25, getdtablesize() automatically grows
+                  gl_cv_func_getdtablesize_works="guessing no" ;;
+                *) gl_cv_func_getdtablesize_works="guessing yes" ;;
+              esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+             #include <unistd.h>
+
+
+$gl_mda_defines
+
+
+int
+main (void)
+{
+int size = getdtablesize();
+                 if (dup2 (0, getdtablesize()) != -1)
+                   return 1;
+                 if (size != getdtablesize())
+                   return 2;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_getdtablesize_works=yes
+else $as_nop
+  gl_cv_func_getdtablesize_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+           ;;
+       esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_getdtablesize_works" >&5
+printf "%s\n" "$gl_cv_func_getdtablesize_works" >&6; }
+    case "$gl_cv_func_getdtablesize_works" in
+      *yes | "no (limitation)") ;;
+      *) REPLACE_GETDTABLESIZE=1 ;;
+    esac
+  else
+    HAVE_GETDTABLESIZE=0
+  fi
+
+  if test $HAVE_GETDTABLESIZE = 0 || test $REPLACE_GETDTABLESIZE = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS getdtablesize.$ac_objext"
+
+    :
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_GETDTABLESIZE=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_GETDTABLESIZE 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+    REPLACE_GETOPT=0
+    if test -n "$gl_replace_getopt"; then
+      REPLACE_GETOPT=1
+    fi
+
+  if test $REPLACE_GETOPT = 1; then
+
+
+  if test $ac_cv_header_sys_cdefs_h = yes; then
+    HAVE_SYS_CDEFS_H=1
+  else
+    HAVE_SYS_CDEFS_H=0
+  fi
+
+
+
+printf "%s\n" "#define __GETOPT_PREFIX rpl_" >>confdefs.h
+
+  GETOPT_H=getopt.h
+  GETOPT_CDEFS_H=getopt-cdefs.h
+
+
+
+  fi
+
+  if test $REPLACE_GETOPT = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS getopt.$ac_objext"
+
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS getopt1.$ac_objext"
+
+
+
+
+
+
+
+  GL_GNULIB_UNISTD_H_GETOPT=1
+
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_GETOPT_POSIX=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_GETOPT_POSIX 1" >>confdefs.h
+
+
+
+
+
+
+
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for getpagesize" >&5
+printf %s "checking for getpagesize... " >&6; }
+if test ${gl_cv_func_getpagesize+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <unistd.h>
+int
+main (void)
+{
+return getpagesize();
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_func_getpagesize=yes
+else $as_nop
+  gl_cv_func_getpagesize=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_getpagesize" >&5
+printf "%s\n" "$gl_cv_func_getpagesize" >&6; }
+
+  if test $gl_cv_func_getpagesize = no; then
+    HAVE_GETPAGESIZE=0
+    ac_fn_c_check_header_compile "$LINENO" "OS.h" "ac_cv_header_OS_h" "$ac_includes_default"
+if test "x$ac_cv_header_OS_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_OS_H 1" >>confdefs.h
+
+fi
+
+    if test $ac_cv_header_OS_h = yes; then
+      HAVE_OS_H=1
+    fi
+    ac_fn_c_check_header_compile "$LINENO" "sys/param.h" "ac_cv_header_sys_param_h" "$ac_includes_default"
+if test "x$ac_cv_header_sys_param_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYS_PARAM_H 1" >>confdefs.h
+
+fi
+
+    if test $ac_cv_header_sys_param_h = yes; then
+      HAVE_SYS_PARAM_H=1
+    fi
+  fi
+  case "$host_os" in
+    mingw*)
+      REPLACE_GETPAGESIZE=1
+      ;;
+  esac
+      ac_fn_check_decl "$LINENO" "getpagesize" "ac_cv_have_decl_getpagesize" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_getpagesize" = xyes
+then :
+
+else $as_nop
+  HAVE_DECL_GETPAGESIZE=0
+fi
+
+  if test $REPLACE_GETPAGESIZE = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS getpagesize.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_GETPAGESIZE=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_GETPAGESIZE 1" >>confdefs.h
+
+
+
+
+
+
+  ac_found=0
+  ac_fn_check_decl "$LINENO" "program_invocation_name" "ac_cv_have_decl_program_invocation_name" "#include <errno.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_program_invocation_name" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_PROGRAM_INVOCATION_NAME $ac_have_decl" >>confdefs.h
+if test $ac_have_decl = 1
+then :
+  ac_found=1
+fi
+
+  ac_fn_check_decl "$LINENO" "program_invocation_short_name" "ac_cv_have_decl_program_invocation_short_name" "#include <errno.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_program_invocation_short_name" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME $ac_have_decl" >>confdefs.h
+if test $ac_have_decl = 1
+then :
+  ac_found=1
+fi
+
+  ac_fn_check_decl "$LINENO" "__argv" "ac_cv_have_decl___argv" "#include <stdlib.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl___argv" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL___ARGV $ac_have_decl" >>confdefs.h
+if test $ac_have_decl = 1
+then :
+  ac_found=1
+fi
+
+
+  # Incur the cost of this test only if none of the above worked.
+  if test $ac_found = 0; then
+    # On OpenBSD 5.1, using the global __progname variable appears to be
+    # the only way to implement getprogname.
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether __progname is defined in default libraries" >&5
+printf %s "checking whether __progname is defined in default libraries... " >&6; }
+if test ${gl_cv_var___progname+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+        gl_cv_var___progname=
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+extern char *__progname;
+int
+main (void)
+{
+return *__progname;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_var___progname=yes
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_var___progname" >&5
+printf "%s\n" "$gl_cv_var___progname" >&6; }
+    if test "$gl_cv_var___progname" = yes; then
+
+printf "%s\n" "#define HAVE_VAR___PROGNAME 1" >>confdefs.h
+
+    fi
+  fi
+
+
+
+  # Autoconf 2.61a.99 and earlier don't support linking a file only
+  # in VPATH builds.  But since GNUmakefile is for maintainer use
+  # only, it does not matter if we skip the link with older autoconf.
+  # Automake 1.10.1 and earlier try to remove GNUmakefile in non-VPATH
+  # builds, so use a shell variable to bypass this.
+  GNUmakefile=GNUmakefile
+  ac_config_links="$ac_config_links $GNUmakefile:$GNUmakefile"
+
+
+  LIB_HARD_LOCALE="$LIB_SETLOCALE_NULL"
+
+
+
+
+  :
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_ICONV=1
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  if test "$am_cv_func_iconv" = yes; then
+
+
+
+
+
+
+  ICONV_H='iconv.h'
+   if test -n "$ICONV_H"; then
+  GL_GENERATE_ICONV_H_TRUE=
+  GL_GENERATE_ICONV_H_FALSE='#'
+else
+  GL_GENERATE_ICONV_H_TRUE='#'
+  GL_GENERATE_ICONV_H_FALSE=
+fi
+
+
+            cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+      #include <iconv.h>
+      #if defined _LIBICONV_VERSION || (defined __GLIBC__ && !defined __UCLIBC__)
+       gnu_iconv
+      #endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "gnu_iconv" >/dev/null 2>&1
+then :
+  gl_func_iconv_gnu=yes
+else $as_nop
+  gl_func_iconv_gnu=no
+fi
+rm -rf conftest*
+
+    if test $gl_func_iconv_gnu = no; then
+      iconv_flavor=
+      case "$host_os" in
+        aix*)         iconv_flavor=ICONV_FLAVOR_AIX ;;
+        irix*)        iconv_flavor=ICONV_FLAVOR_IRIX ;;
+        hpux*)        iconv_flavor=ICONV_FLAVOR_HPUX ;;
+        osf*)         iconv_flavor=ICONV_FLAVOR_OSF ;;
+        solaris*)     iconv_flavor=ICONV_FLAVOR_SOLARIS ;;
+        openedition*) iconv_flavor=ICONV_FLAVOR_ZOS ;;
+      esac
+      if test -n "$iconv_flavor"; then
+
+printf "%s\n" "#define ICONV_FLAVOR $iconv_flavor" >>confdefs.h
+
+
+
+
+
+
+
+
+  ICONV_H='iconv.h'
+   if test -n "$ICONV_H"; then
+  GL_GENERATE_ICONV_H_TRUE=
+  GL_GENERATE_ICONV_H_FALSE='#'
+else
+  GL_GENERATE_ICONV_H_TRUE='#'
+  GL_GENERATE_ICONV_H_FALSE=
+fi
+
+
+  REPLACE_ICONV_OPEN=1
+
+      fi
+    fi
+
+  fi
+
+  if test $REPLACE_ICONV_OPEN = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS iconv_open.$ac_objext"
+
+  fi
+  if test $REPLACE_ICONV = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS iconv.$ac_objext"
+
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS iconv_close.$ac_objext"
+
+  fi
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the compiler generally respects inline" >&5
+printf %s "checking whether the compiler generally respects inline... " >&6; }
+if test ${gl_cv_c_inline_effective+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test $ac_cv_c_inline = no; then
+       gl_cv_c_inline_effective=no
+     else
+                                          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+#ifdef __NO_INLINE__
+               #error "inline is not effective"
+             #endif
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_c_inline_effective=yes
+else $as_nop
+  gl_cv_c_inline_effective=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+     fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_c_inline_effective" >&5
+printf "%s\n" "$gl_cv_c_inline_effective" >&6; }
+  if test $gl_cv_c_inline_effective = yes; then
+
+printf "%s\n" "#define HAVE_INLINE 1" >>confdefs.h
+
+  fi
+
+
+
+
+
+
+
+
+
+
+         case $host_os in
+    mingw*) REPLACE_ISATTY=1 ;;
+  esac
+
+  if test $REPLACE_ISATTY = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS isatty.$ac_objext"
+
+    :
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_ISATTY=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_ISATTY 1" >>confdefs.h
+
+
+
+
+
+
+
+
+  if test $ac_cv_func_isblank = no; then
+    HAVE_ISBLANK=0
+  fi
+
+  if test $HAVE_ISBLANK = 0; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS isblank.$ac_objext"
+
+  fi
+
+
+printf "%s\n" "#define GNULIB_ISBLANK 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_ISBLANK=1
+
+
+
+
+
+
+
+
+
+  ac_fn_check_decl "$LINENO" "iswblank" "ac_cv_have_decl_iswblank" "
+    #include <wchar.h>
+    #include <wctype.h>
+
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_iswblank" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_ISWBLANK $ac_have_decl" >>confdefs.h
+
+  if test $ac_cv_func_iswblank = no; then
+    HAVE_ISWBLANK=0
+    if test $ac_cv_have_decl_iswblank = yes; then
+      REPLACE_ISWBLANK=1
+    fi
+  fi
+  if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
+        :
+  else
+    if test $HAVE_ISWBLANK = 0 || test $REPLACE_ISWBLANK = 1; then
+            :
+    fi
+  fi
+
+
+  if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
+    :
+  else
+    if test $HAVE_ISWBLANK = 0 || test $REPLACE_ISWBLANK = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS iswblank.$ac_objext"
+
+    fi
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_ISWBLANK=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_ISWBLANK 1" >>confdefs.h
+
+
+
+
+
+
+
+  if test $HAVE_WCTYPE_T = 0 || test $GNULIBHEADERS_OVERRIDE_WINT_T = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS iswctype.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_ISWCTYPE=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_ISWCTYPE 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+  if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
+        REPLACE_ISWDIGIT="$REPLACE_ISWCNTRL"
+  else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether iswdigit is ISO C compliant" >&5
+printf %s "checking whether iswdigit is ISO C compliant... " >&6; }
+if test ${gl_cv_func_iswdigit_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                     case "$host_os" in
+         # Guess no on FreeBSD, NetBSD, Solaris, native Windows.
+         freebsd* | dragonfly* | netbsd* | solaris* | mingw*)
+           gl_cv_func_iswdigit_works="guessing no" ;;
+         # Guess yes otherwise.
+         *) gl_cv_func_iswdigit_works="guessing yes" ;;
+       esac
+       if test $LOCALE_FR != none || test $LOCALE_JA != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_ZH_CN != none; then
+         if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#include <wctype.h>
+
+/* Returns the value of iswdigit for the multibyte character s[0..n-1].  */
+static int
+for_character (const char *s, size_t n)
+{
+  mbstate_t state;
+  wchar_t wc;
+  size_t ret;
+
+  memset (&state, '\0', sizeof (mbstate_t));
+  wc = (wchar_t) 0xBADFACE;
+  ret = mbrtowc (&wc, s, n, &state);
+  if (ret != n)
+    abort ();
+
+  return iswdigit (wc);
+}
+
+int
+main (int argc, char *argv[])
+{
+  int is;
+  int result = 0;
+
+  if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
+    {
+      /* This fails on mingw, MSVC 14.  */
+      /* U+00B2 SUPERSCRIPT TWO */
+      is = for_character ("\262", 1);
+      if (!(is == 0))
+        result |= 1;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      /* This fails on NetBSD 8.0.  */
+      /* U+FF11 FULLWIDTH DIGIT ONE */
+      is = for_character ("\243\261", 2);
+      if (!(is == 0))
+        result |= 2;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      /* This fails on FreeBSD 13.0, NetBSD 8.0, MSVC 14.  */
+      /* U+0663 ARABIC-INDIC DIGIT THREE */
+      is = for_character ("\331\243", 2);
+      if (!(is == 0))
+        result |= 4;
+      /* This fails on FreeBSD 13.0, NetBSD 8.0, MSVC 14.  */
+      /* U+FF11 FULLWIDTH DIGIT ONE */
+      is = for_character ("\357\274\221", 3);
+      if (!(is == 0))
+        result |= 8;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      /* This fails on NetBSD 8.0, Solaris 10, Solaris 11.4.  */
+      /* U+FF11 FULLWIDTH DIGIT ONE */
+      is = for_character ("\243\261", 2);
+      if (!(is == 0))
+        result |= 16;
+    }
+  return result;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_iswdigit_works=yes
+else $as_nop
+  gl_cv_func_iswdigit_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+       fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_iswdigit_works" >&5
+printf "%s\n" "$gl_cv_func_iswdigit_works" >&6; }
+    case "$gl_cv_func_iswdigit_works" in
+      *yes) ;;
+      *) REPLACE_ISWDIGIT=1 ;;
+    esac
+  fi
+
+  if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
+    :
+  else
+    if test $REPLACE_ISWDIGIT = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS iswdigit.$ac_objext"
+
+    fi
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_ISWDIGIT=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_ISWDIGIT 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+  if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
+        REPLACE_ISWXDIGIT="$REPLACE_ISWCNTRL"
+  else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether iswxdigit is ISO C compliant" >&5
+printf %s "checking whether iswxdigit is ISO C compliant... " >&6; }
+if test ${gl_cv_func_iswxdigit_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                     case "$host_os" in
+         # Guess no on FreeBSD, NetBSD, Solaris, native Windows.
+         freebsd* | dragonfly* | netbsd* | solaris* | mingw*)
+           gl_cv_func_iswxdigit_works="guessing no" ;;
+         # Guess yes otherwise.
+         *) gl_cv_func_iswxdigit_works="guessing yes" ;;
+       esac
+       if test $LOCALE_JA != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_ZH_CN != none; then
+         if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#include <wctype.h>
+
+/* Returns the value of iswxdigit for the multibyte character s[0..n-1].  */
+static int
+for_character (const char *s, size_t n)
+{
+  mbstate_t state;
+  wchar_t wc;
+  size_t ret;
+
+  memset (&state, '\0', sizeof (mbstate_t));
+  wc = (wchar_t) 0xBADFACE;
+  ret = mbrtowc (&wc, s, n, &state);
+  if (ret != n)
+    abort ();
+
+  return iswxdigit (wc);
+}
+
+int
+main (int argc, char *argv[])
+{
+  int is;
+  int result = 0;
+
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      /* This fails on NetBSD 8.0.  */
+      /* U+FF21 FULLWIDTH LATIN CAPITAL LETTER A */
+      is = for_character ("\243\301", 2);
+      if (!(is == 0))
+        result |= 1;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      /* This fails on FreeBSD 13.0.  */
+      /* U+0663 ARABIC-INDIC DIGIT THREE */
+      is = for_character ("\331\243", 2);
+      if (!(is == 0))
+        result |= 2;
+      /* This fails on MSVC 14.  */
+      /* U+FF21 FULLWIDTH LATIN CAPITAL LETTER A */
+      is = for_character ("\357\274\241", 3);
+      if (!(is == 0))
+        result |= 4;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      /* This fails on Solaris 10, Solaris 11.4.  */
+      /* U+FF11 FULLWIDTH DIGIT ONE */
+      is = for_character ("\243\261", 2);
+      if (!(is == 0))
+        result |= 8;
+    }
+  return result;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_iswxdigit_works=yes
+else $as_nop
+  gl_cv_func_iswxdigit_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+       fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_iswxdigit_works" >&5
+printf "%s\n" "$gl_cv_func_iswxdigit_works" >&6; }
+    case "$gl_cv_func_iswxdigit_works" in
+      *yes) ;;
+      *) REPLACE_ISWXDIGIT=1 ;;
+    esac
+  fi
+
+  if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
+    :
+  else
+    if test $REPLACE_ISWXDIGIT = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS iswxdigit.$ac_objext"
+
+    fi
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_ISWXDIGIT=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_ISWXDIGIT 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports the __inline keyword" >&5
+printf %s "checking whether the compiler supports the __inline keyword... " >&6; }
+if test ${gl_cv_c___inline+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+typedef int foo_t;
+           static __inline foo_t foo (void) { return 0; }
+int
+main (void)
+{
+return foo ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_c___inline=yes
+else $as_nop
+  gl_cv_c___inline=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_c___inline" >&5
+printf "%s\n" "$gl_cv_c___inline" >&6; }
+  if test $gl_cv_c___inline = yes; then
+
+printf "%s\n" "#define HAVE___INLINE 1" >>confdefs.h
+
+  fi
+
+
+
+
+
+    LOCALCHARSET_TESTS_ENVIRONMENT=
+
+
+
+
+
+
+
+
+
+
+
+  if test $REPLACE_STRUCT_LCONV = 1; then
+    REPLACE_LOCALECONV=1
+  fi
+
+  if test $REPLACE_LOCALECONV = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS localeconv.$ac_objext"
+
+
+  ac_fn_c_check_member "$LINENO" "struct lconv" "decimal_point" "ac_cv_member_struct_lconv_decimal_point" "#include <locale.h>
+"
+if test "x$ac_cv_member_struct_lconv_decimal_point" = xyes
+then :
+
+printf "%s\n" "#define HAVE_STRUCT_LCONV_DECIMAL_POINT 1" >>confdefs.h
+
+
+fi
+
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_LOCALECONV=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_LOCALECONV 1" >>confdefs.h
+
+
+
+
+
+  if test "$gl_threads_api" = posix; then
+    # OSF/1 4.0 and Mac OS X 10.1 lack the pthread_rwlock_t type and the
+    # pthread_rwlock_* functions.
+    has_rwlock=false
+    ac_fn_c_check_type "$LINENO" "pthread_rwlock_t" "ac_cv_type_pthread_rwlock_t" "#include <pthread.h>
+"
+if test "x$ac_cv_type_pthread_rwlock_t" = xyes
+then :
+  has_rwlock=true
+
+printf "%s\n" "#define HAVE_PTHREAD_RWLOCK 1" >>confdefs.h
+
+fi
+
+    if $has_rwlock; then
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether pthread_rwlock_rdlock prefers a writer to a reader" >&5
+printf %s "checking whether pthread_rwlock_rdlock prefers a writer to a reader... " >&6; }
+if test ${gl_cv_pthread_rwlock_rdlock_prefer_writer+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  save_LIBS="$LIBS"
+     LIBS="$LIBS $LIBMULTITHREAD"
+     if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                         # Guess no on glibc systems.
+          *-gnu* | gnu*) gl_cv_pthread_rwlock_rdlock_prefer_writer="guessing no" ;;
+                         # Guess no on musl systems.
+          *-musl*)       gl_cv_pthread_rwlock_rdlock_prefer_writer="guessing no" ;;
+                         # Guess no on bionic systems.
+          *-android*)    gl_cv_pthread_rwlock_rdlock_prefer_writer="guessing no" ;;
+                         # Guess yes on native Windows with the mingw-w64 winpthreads library.
+                         # Guess no on native Windows with the gnulib windows-rwlock module.
+          mingw*)        if test "$gl_use_threads" = yes || test "$gl_use_threads" = posix; then
+                           gl_cv_pthread_rwlock_rdlock_prefer_writer="guessing yes"
+                         else
+                           gl_cv_pthread_rwlock_rdlock_prefer_writer="guessing no"
+                         fi
+                         ;;
+                         # If we don't know, obey --enable-cross-guesses.
+          *)             gl_cv_pthread_rwlock_rdlock_prefer_writer="$gl_cross_guess_normal" ;;
+         esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#define SUCCEED() exit (0)
+#define FAILURE() exit (1)
+#define UNEXPECTED(n) (exit (10 + (n)))
+
+/* The main thread creates the waiting writer and the requesting reader threads
+   in the default way; this guarantees that they have the same priority.
+   We can reuse the main thread as first reader thread.  */
+
+static pthread_rwlock_t lock;
+static pthread_t reader1;
+static pthread_t writer;
+static pthread_t reader2;
+static pthread_t timer;
+/* Used to pass control from writer to reader2 and from reader2 to timer,
+   as in a relay race.
+   Passing control from one running thread to another running thread
+   is most likely faster than to create the second thread.  */
+static pthread_mutex_t baton;
+
+static void *
+timer_func (void *ignored)
+{
+  /* Step 13 (can be before or after step 12):
+     The timer thread takes the baton, then waits a moment to make sure
+     it can tell whether the second reader thread is blocked at step 12.  */
+  if (pthread_mutex_lock (&baton))
+    UNEXPECTED (13);
+  usleep (100000);
+  /* By the time we get here, it's clear that the second reader thread is
+     blocked at step 12.  This is the desired behaviour.  */
+  SUCCEED ();
+}
+
+static void *
+reader2_func (void *ignored)
+{
+  int err;
+
+  /* Step 8 (can be before or after step 7):
+     The second reader thread takes the baton, then waits a moment to make sure
+     the writer thread has reached step 7.  */
+  if (pthread_mutex_lock (&baton))
+    UNEXPECTED (8);
+  usleep (100000);
+  /* Step 9: The second reader thread requests the lock.  */
+  err = pthread_rwlock_tryrdlock (&lock);
+  if (err == 0)
+    FAILURE ();
+  else if (err != EBUSY)
+    UNEXPECTED (9);
+  /* Step 10: Launch a timer, to test whether the next call blocks.  */
+  if (pthread_create (&timer, NULL, timer_func, NULL))
+    UNEXPECTED (10);
+  /* Step 11: Release the baton.  */
+  if (pthread_mutex_unlock (&baton))
+    UNEXPECTED (11);
+  /* Step 12: The second reader thread requests the lock.  */
+  err = pthread_rwlock_rdlock (&lock);
+  if (err == 0)
+    FAILURE ();
+  else
+    UNEXPECTED (12);
+}
+
+static void *
+writer_func (void *ignored)
+{
+  /* Step 4: Take the baton, so that the second reader thread does not go ahead
+     too early.  */
+  if (pthread_mutex_lock (&baton))
+    UNEXPECTED (4);
+  /* Step 5: Create the second reader thread.  */
+  if (pthread_create (&reader2, NULL, reader2_func, NULL))
+    UNEXPECTED (5);
+  /* Step 6: Release the baton.  */
+  if (pthread_mutex_unlock (&baton))
+    UNEXPECTED (6);
+  /* Step 7: The writer thread requests the lock.  */
+  if (pthread_rwlock_wrlock (&lock))
+    UNEXPECTED (7);
+  return NULL;
+}
+
+int
+main ()
+{
+  reader1 = pthread_self ();
+
+  /* Step 1: The main thread initializes the lock and the baton.  */
+  if (pthread_rwlock_init (&lock, NULL))
+    UNEXPECTED (1);
+  if (pthread_mutex_init (&baton, NULL))
+    UNEXPECTED (1);
+  /* Step 2: The main thread acquires the lock as a reader.  */
+  if (pthread_rwlock_rdlock (&lock))
+    UNEXPECTED (2);
+  /* Step 3: Create the writer thread.  */
+  if (pthread_create (&writer, NULL, writer_func, NULL))
+    UNEXPECTED (3);
+  /* Job done.  Go to sleep.  */
+  for (;;)
+    {
+      sleep (1);
+    }
+}
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_pthread_rwlock_rdlock_prefer_writer=yes
+else $as_nop
+  gl_cv_pthread_rwlock_rdlock_prefer_writer=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+     LIBS="$save_LIBS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_pthread_rwlock_rdlock_prefer_writer" >&5
+printf "%s\n" "$gl_cv_pthread_rwlock_rdlock_prefer_writer" >&6; }
+  case "$gl_cv_pthread_rwlock_rdlock_prefer_writer" in
+    *yes)
+
+printf "%s\n" "#define HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER 1" >>confdefs.h
+
+      ;;
+  esac
+
+    fi
+    # glibc defines PTHREAD_MUTEX_RECURSIVE as enum, not as a macro.
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+      #include <pthread.h>
+int
+main (void)
+{
+
+#if __FreeBSD__ == 4
+error "No, in FreeBSD 4.0 recursive mutexes actually don't work."
+#elif (defined __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ \
+       && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1070)
+error "No, in Mac OS X < 10.7 recursive mutexes actually don't work."
+#else
+int x = (int)PTHREAD_MUTEX_RECURSIVE;
+return !x;
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+
+printf "%s\n" "#define HAVE_PTHREAD_MUTEX_RECURSIVE 1" >>confdefs.h
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+  fi
+  :
+
+
+
+printf "%s\n" "#define GNULIB_LOCK 1" >>confdefs.h
+
+
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether lseek detects pipes" >&5
+printf %s "checking whether lseek detects pipes... " >&6; }
+if test ${gl_cv_func_lseek_pipe+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  case "$host_os" in
+       mingw*)
+                                                               gl_cv_func_lseek_pipe=no
+         ;;
+       *)
+         if test $cross_compiling = no; then
+           cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <sys/types.h> /* for off_t */
+#include <stdio.h> /* for SEEK_CUR */
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#else /* on Windows with MSVC */
+# include <io.h>
+#endif
+
+
+$gl_mda_defines
+
+int
+main (void)
+{
+
+  /* Exit with success only if stdin is seekable.  */
+  return lseek (0, (off_t)0, SEEK_CUR) < 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  if test -s conftest$ac_exeext \
+                 && ./conftest$ac_exeext < conftest.$ac_ext \
+                 && test 1 = "`echo hi \
+                   | { ./conftest$ac_exeext; echo $?; cat >/dev/null; }`"; then
+                gl_cv_func_lseek_pipe=yes
+              else
+                gl_cv_func_lseek_pipe=no
+              fi
+
+else $as_nop
+  gl_cv_func_lseek_pipe=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+         else
+           cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#if defined __BEOS__
+/* BeOS mistakenly return 0 when trying to seek on pipes.  */
+  Choke me.
+#endif
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_func_lseek_pipe=yes
+else $as_nop
+  gl_cv_func_lseek_pipe=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+         fi
+         ;;
+     esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_lseek_pipe" >&5
+printf "%s\n" "$gl_cv_func_lseek_pipe" >&6; }
+  if test $gl_cv_func_lseek_pipe = no; then
+    REPLACE_LSEEK=1
+
+printf "%s\n" "#define LSEEK_PIPE_BROKEN 1" >>confdefs.h
+
+  fi
+
+
+  if test $WINDOWS_64_BIT_OFF_T = 1; then
+    REPLACE_LSEEK=1
+  fi
+
+  if test $REPLACE_LSEEK = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS lseek.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_LSEEK=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_LSEEK 1" >>confdefs.h
+
+
+
+
+
+
+
+  if test $ac_cv_func_lstat = yes; then
+
+    case $host_os,$gl_cv_func_lstat_dereferences_slashed_symlink in
+      solaris* | *no)
+        REPLACE_LSTAT=1
+        ;;
+    esac
+  else
+    HAVE_LSTAT=0
+  fi
+
+  if test $REPLACE_LSTAT = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS lstat.$ac_objext"
+
+    :
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_LSTAT=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_LSTAT 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+  if test $REPLACE_MALLOC = 0; then
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether malloc (0) returns nonnull" >&5
+printf %s "checking whether malloc (0) returns nonnull... " >&6; }
+if test ${ac_cv_func_malloc_0_nonnull+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+          # Guess yes on platforms where we know the result.
+          *-gnu* | freebsd* | netbsd* | openbsd* | bitrig* \
+          | gnu* | *-musl* | midnightbsd* \
+          | hpux* | solaris* | cygwin* | mingw* | msys* )
+            ac_cv_func_malloc_0_nonnull="guessing yes" ;;
+          # If we don't know, obey --enable-cross-guesses.
+          *) ac_cv_func_malloc_0_nonnull="$gl_cross_guess_normal" ;;
+        esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdlib.h>
+
+int
+main (void)
+{
+void *p = malloc (0);
+            int result = !p;
+            free (p);
+            return result;
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  ac_cv_func_malloc_0_nonnull=yes
+else $as_nop
+  ac_cv_func_malloc_0_nonnull=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_malloc_0_nonnull" >&5
+printf "%s\n" "$ac_cv_func_malloc_0_nonnull" >&6; }
+  case $ac_cv_func_malloc_0_nonnull in #(
+  *yes) :
+     ;; #(
+  *) :
+    REPLACE_MALLOC=1 ;;
+esac
+
+  fi
+
+  if test $REPLACE_MALLOC = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS malloc.$ac_objext"
+
+  fi
+
+  if test $REPLACE_MALLOC = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS malloc.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_MALLOC_POSIX=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_MALLOC_POSIX 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+  :
+
+
+
+
+
+
+
+  if test $ac_cv_func_mbrlen = no; then
+    HAVE_MBRLEN=0
+    ac_fn_check_decl "$LINENO" "mbrlen" "ac_cv_have_decl_mbrlen" "
+      #include <wchar.h>
+
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_mbrlen" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_MBRLEN $ac_have_decl" >>confdefs.h
+
+    if test $ac_cv_have_decl_mbrlen = yes; then
+                        REPLACE_MBRLEN=1
+    fi
+  else
+                    if test $REPLACE_MBRTOWC = 1; then
+      REPLACE_MBRLEN=1
+    fi
+  fi
+
+  if test $HAVE_MBRLEN = 0 || test $REPLACE_MBRLEN = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS mbrlen.$ac_objext"
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_MBRLEN=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_MBRLEN 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+        if case "$host_os" in
+       mingw*) true ;;
+       *) test $ac_cv_func_mbsinit = yes ;;
+     esac \
+    && test $ac_cv_func_mbrtowc = yes; then
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc handles incomplete characters" >&5
+printf %s "checking whether mbrtowc handles incomplete characters... " >&6; }
+if test ${gl_cv_func_mbrtowc_incomplete_state+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                     # Guess no on AIX and OSF/1.
+        aix* | osf*) gl_cv_func_mbrtowc_incomplete_state="guessing no" ;;
+                     # Guess yes otherwise.
+        *)           gl_cv_func_mbrtowc_incomplete_state="guessing yes" ;;
+      esac
+      if test $LOCALE_JA != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      const char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        if (mbsinit (&state))
+          return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_incomplete_state=yes
+else $as_nop
+  gl_cv_func_mbrtowc_incomplete_state=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      else
+        if test $LOCALE_FR_UTF8 != none; then
+          if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      const char input[] = "B\303\274\303\237er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        if (mbsinit (&state))
+          return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_incomplete_state=yes
+else $as_nop
+  gl_cv_func_mbrtowc_incomplete_state=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+        fi
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_incomplete_state" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_incomplete_state" >&6; }
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc works as well as mbtowc" >&5
+printf %s "checking whether mbrtowc works as well as mbtowc... " >&6; }
+if test ${gl_cv_func_mbrtowc_sanitycheck+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                    # Guess no on Solaris 8.
+        solaris2.8) gl_cv_func_mbrtowc_sanitycheck="guessing no" ;;
+                    # Guess yes otherwise.
+        *)          gl_cv_func_mbrtowc_sanitycheck="guessing yes" ;;
+      esac
+      if test $LOCALE_ZH_CN != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  /* This fails on Solaris 8:
+     mbrtowc returns 2, and sets wc to 0x00F0.
+     mbtowc returns 4 (correct) and sets wc to 0x5EDC.  */
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      char input[] = "B\250\271\201\060\211\070er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 3, 6, &state) != 4
+          && mbtowc (&wc, input + 3, 6) == 4)
+        return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_sanitycheck=yes
+else $as_nop
+  gl_cv_func_mbrtowc_sanitycheck=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_sanitycheck" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_sanitycheck" >&6; }
+
+    REPLACE_MBSTATE_T=0
+    case "$gl_cv_func_mbrtowc_incomplete_state" in
+      *yes) ;;
+      *) REPLACE_MBSTATE_T=1 ;;
+    esac
+    case "$gl_cv_func_mbrtowc_sanitycheck" in
+      *yes) ;;
+      *) REPLACE_MBSTATE_T=1 ;;
+    esac
+  else
+    REPLACE_MBSTATE_T=1
+  fi
+
+
+
+  if test $ac_cv_func_mbrtowc = no; then
+    HAVE_MBRTOWC=0
+    ac_fn_check_decl "$LINENO" "mbrtowc" "ac_cv_have_decl_mbrtowc" "
+      #include <wchar.h>
+
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_mbrtowc" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_MBRTOWC $ac_have_decl" >>confdefs.h
+
+    if test $ac_cv_have_decl_mbrtowc = yes; then
+                        REPLACE_MBRTOWC=1
+    fi
+  else
+    if test $REPLACE_MBSTATE_T = 1; then
+      REPLACE_MBRTOWC=1
+    else
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc handles a NULL pwc argument" >&5
+printf %s "checking whether mbrtowc handles a NULL pwc argument... " >&6; }
+if test ${gl_cv_func_mbrtowc_null_arg1+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                  # Guess no on Solaris.
+        solaris*) gl_cv_func_mbrtowc_null_arg1="guessing no" ;;
+                  # Guess yes otherwise.
+        *)        gl_cv_func_mbrtowc_null_arg1="guessing yes" ;;
+      esac
+      if test $LOCALE_FR_UTF8 != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  int result = 0;
+
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      char input[] = "\303\237er";
+      mbstate_t state;
+      wchar_t wc;
+      size_t ret;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      wc = (wchar_t) 0xBADFACE;
+      ret = mbrtowc (&wc, input, 5, &state);
+      if (ret != 2)
+        result |= 1;
+      if (!mbsinit (&state))
+        result |= 2;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      ret = mbrtowc (NULL, input, 5, &state);
+      if (ret != 2) /* Solaris 7 fails here: ret is -1.  */
+        result |= 4;
+      if (!mbsinit (&state))
+        result |= 8;
+    }
+  return result;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_null_arg1=yes
+else $as_nop
+  gl_cv_func_mbrtowc_null_arg1=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_null_arg1" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_null_arg1" >&6; }
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc handles a NULL string argument" >&5
+printf %s "checking whether mbrtowc handles a NULL string argument... " >&6; }
+if test ${gl_cv_func_mbrtowc_null_arg2+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+              # Guess no on OSF/1.
+        osf*) gl_cv_func_mbrtowc_null_arg2="guessing no" ;;
+              # Guess yes otherwise.
+        *)    gl_cv_func_mbrtowc_null_arg2="guessing yes" ;;
+      esac
+      if test $LOCALE_FR_UTF8 != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      mbstate_t state;
+      wchar_t wc;
+      int ret;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      wc = (wchar_t) 0xBADFACE;
+      mbrtowc (&wc, NULL, 5, &state);
+      /* Check that wc was not modified.  */
+      if (wc != (wchar_t) 0xBADFACE)
+        return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_null_arg2=yes
+else $as_nop
+  gl_cv_func_mbrtowc_null_arg2=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_null_arg2" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_null_arg2" >&6; }
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc has a correct return value" >&5
+printf %s "checking whether mbrtowc has a correct return value... " >&6; }
+if test ${gl_cv_func_mbrtowc_retval+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                                   # Guess no on HP-UX, Solaris, native Windows.
+        hpux* | solaris* | mingw*) gl_cv_func_mbrtowc_retval="guessing no" ;;
+                                   # Guess yes otherwise.
+        *)                         gl_cv_func_mbrtowc_retval="guessing yes" ;;
+      esac
+      if test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none \
+         || { case "$host_os" in mingw*) true;; *) false;; esac; }; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  int result = 0;
+  int found_some_locale = 0;
+  /* This fails on Solaris.  */
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      char input[] = "B\303\274\303\237er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        {
+          input[1] = '\0';
+          if (mbrtowc (&wc, input + 2, 5, &state) != 1)
+            result |= 1;
+        }
+      found_some_locale = 1;
+    }
+  /* This fails on HP-UX 11.11.  */
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        {
+          input[1] = '\0';
+          if (mbrtowc (&wc, input + 2, 5, &state) != 2)
+            result |= 2;
+        }
+      found_some_locale = 1;
+    }
+  /* This fails on native Windows.  */
+  if (setlocale (LC_ALL, "Japanese_Japan.932") != NULL)
+    {
+      char input[] = "<\223\372\226\173\214\352>"; /* "<日本語>" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 3, 1, &state) == (size_t)(-2))
+        {
+          input[3] = '\0';
+          if (mbrtowc (&wc, input + 4, 4, &state) != 1)
+            result |= 4;
+        }
+      found_some_locale = 1;
+    }
+  if (setlocale (LC_ALL, "Chinese_Taiwan.950") != NULL)
+    {
+      char input[] = "<\244\351\245\273\273\171>"; /* "<日本語>" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 3, 1, &state) == (size_t)(-2))
+        {
+          input[3] = '\0';
+          if (mbrtowc (&wc, input + 4, 4, &state) != 1)
+            result |= 8;
+        }
+      found_some_locale = 1;
+    }
+  if (setlocale (LC_ALL, "Chinese_China.936") != NULL)
+    {
+      char input[] = "<\310\325\261\276\325\132>"; /* "<日本語>" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 3, 1, &state) == (size_t)(-2))
+        {
+          input[3] = '\0';
+          if (mbrtowc (&wc, input + 4, 4, &state) != 1)
+            result |= 16;
+        }
+      found_some_locale = 1;
+    }
+  return (found_some_locale ? result : 77);
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_retval=yes
+else $as_nop
+  if test $? != 77; then
+             gl_cv_func_mbrtowc_retval=no
+           fi
+
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_retval" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_retval" >&6; }
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc returns 0 when parsing a NUL character" >&5
+printf %s "checking whether mbrtowc returns 0 when parsing a NUL character... " >&6; }
+if test ${gl_cv_func_mbrtowc_nul_retval+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                       # Guess no on Solaris 8 and 9.
+        solaris2.[89]) gl_cv_func_mbrtowc_nul_retval="guessing no" ;;
+                       # Guess yes otherwise.
+        *)             gl_cv_func_mbrtowc_nul_retval="guessing yes" ;;
+      esac
+      if test $LOCALE_ZH_CN != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  /* This fails on Solaris 8 and 9.  */
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "", 1, &state) != 0)
+        return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_nul_retval=yes
+else $as_nop
+  gl_cv_func_mbrtowc_nul_retval=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_nul_retval" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_nul_retval" >&6; }
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc stores incomplete characters" >&5
+printf %s "checking whether mbrtowc stores incomplete characters... " >&6; }
+if test ${gl_cv_func_mbrtowc_stores_incomplete+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+               case "$host_os" in
+               # Guess yes on native Windows.
+       mingw*) gl_cv_func_mbrtowc_stores_incomplete="guessing yes" ;;
+       *)      gl_cv_func_mbrtowc_stores_incomplete="guessing no" ;;
+     esac
+     case "$host_os" in
+       mingw*)
+         if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  int result = 0;
+  if (setlocale (LC_ALL, "French_France.65001") != NULL)
+    {
+      wchar_t wc = (wchar_t) 0xBADFACE;
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "\303", 1, &state) == (size_t)(-2)
+          && wc != (wchar_t) 0xBADFACE)
+        result |= 1;
+    }
+  if (setlocale (LC_ALL, "Japanese_Japan.932") != NULL)
+    {
+      wchar_t wc = (wchar_t) 0xBADFACE;
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "\226", 1, &state) == (size_t)(-2)
+          && wc != (wchar_t) 0xBADFACE)
+        result |= 2;
+    }
+  if (setlocale (LC_ALL, "Chinese_Taiwan.950") != NULL)
+    {
+      wchar_t wc = (wchar_t) 0xBADFACE;
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "\245", 1, &state) == (size_t)(-2)
+          && wc != (wchar_t) 0xBADFACE)
+        result |= 4;
+    }
+  if (setlocale (LC_ALL, "Chinese_China.936") != NULL)
+    {
+      wchar_t wc = (wchar_t) 0xBADFACE;
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "\261", 1, &state) == (size_t)(-2)
+          && wc != (wchar_t) 0xBADFACE)
+        result |= 8;
+    }
+  return result;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_stores_incomplete=no
+else $as_nop
+  gl_cv_func_mbrtowc_stores_incomplete=yes
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+         ;;
+       *)
+
+         if test $LOCALE_FR_UTF8 != none; then
+           if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      wchar_t wc = (wchar_t) 0xBADFACE;
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "\303", 1, &state) == (size_t)(-2)
+          && wc != (wchar_t) 0xBADFACE)
+        return 1;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_stores_incomplete=no
+else $as_nop
+  gl_cv_func_mbrtowc_stores_incomplete=yes
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+         fi
+         ;;
+     esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_stores_incomplete" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_stores_incomplete" >&6; }
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc works on empty input" >&5
+printf %s "checking whether mbrtowc works on empty input... " >&6; }
+if test ${gl_cv_func_mbrtowc_empty_input+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                              # Guess no on AIX and glibc systems.
+        aix* | *-gnu* | gnu*) gl_cv_func_mbrtowc_empty_input="guessing no" ;;
+                              # Guess yes on native Windows.
+        mingw*)               gl_cv_func_mbrtowc_empty_input="guessing yes" ;;
+        *)                    gl_cv_func_mbrtowc_empty_input="guessing yes" ;;
+      esac
+      if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+           #include <wchar.h>
+           static wchar_t wc;
+           static mbstate_t mbs;
+           int
+           main (void)
+           {
+             return mbrtowc (&wc, "", 0, &mbs) != (size_t) -2;
+           }
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_empty_input=yes
+else $as_nop
+  gl_cv_func_mbrtowc_empty_input=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_empty_input" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_empty_input" >&6; }
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the C locale is free of encoding errors" >&5
+printf %s "checking whether the C locale is free of encoding errors... " >&6; }
+if test ${gl_cv_func_mbrtowc_C_locale_sans_EILSEQ+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+               gl_cv_func_mbrtowc_C_locale_sans_EILSEQ="$gl_cross_guess_normal"
+
+     if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                 # Guess yes on native Windows.
+         mingw*) gl_cv_func_mbrtowc_C_locale_sans_EILSEQ="guessing yes" ;;
+       esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <limits.h>
+            #include <locale.h>
+            #include <wchar.h>
+
+int
+main (void)
+{
+
+            int i;
+            char *locale = setlocale (LC_ALL, "C");
+            if (! locale)
+              return 2;
+            for (i = CHAR_MIN; i <= CHAR_MAX; i++)
+              {
+                char c = i;
+                wchar_t wc;
+                mbstate_t mbs = { 0, };
+                size_t ss = mbrtowc (&wc, &c, 1, &mbs);
+                if (1 < ss)
+                  return 3;
+              }
+            return 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_C_locale_sans_EILSEQ=yes
+else $as_nop
+  gl_cv_func_mbrtowc_C_locale_sans_EILSEQ=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_C_locale_sans_EILSEQ" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_C_locale_sans_EILSEQ" >&6; }
+
+      case "$gl_cv_func_mbrtowc_null_arg1" in
+        *yes) ;;
+        *)
+printf "%s\n" "#define MBRTOWC_NULL_ARG1_BUG 1" >>confdefs.h
+
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_null_arg2" in
+        *yes) ;;
+        *)
+printf "%s\n" "#define MBRTOWC_NULL_ARG2_BUG 1" >>confdefs.h
+
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_retval" in
+        *yes) ;;
+        *)
+printf "%s\n" "#define MBRTOWC_RETVAL_BUG 1" >>confdefs.h
+
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_nul_retval" in
+        *yes) ;;
+        *)
+printf "%s\n" "#define MBRTOWC_NUL_RETVAL_BUG 1" >>confdefs.h
+
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_stores_incomplete" in
+        *no) ;;
+        *)
+printf "%s\n" "#define MBRTOWC_STORES_INCOMPLETE_BUG 1" >>confdefs.h
+
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_empty_input" in
+        *yes) ;;
+        *)
+printf "%s\n" "#define MBRTOWC_EMPTY_INPUT_BUG 1" >>confdefs.h
+
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_C_locale_sans_EILSEQ" in
+        *yes) ;;
+        *)
+printf "%s\n" "#define MBRTOWC_IN_C_LOCALE_MAYBE_EILSEQ 1" >>confdefs.h
+
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+    fi
+  fi
+  if test $REPLACE_MBSTATE_T = 1; then
+    case "$host_os" in
+      mingw*) LIB_MBRTOWC= ;;
+      *)
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether imported symbols can be declared weak" >&5
+printf %s "checking whether imported symbols can be declared weak... " >&6; }
+if test ${gl_cv_have_weak+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_cv_have_weak=no
+          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+extern void xyzzy ();
+#pragma weak xyzzy
+int
+main (void)
+{
+xyzzy();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_have_weak=maybe
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+     if test $gl_cv_have_weak = maybe; then
+                     if test "$cross_compiling" = yes
+then :
+                      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef __ELF__
+             Extensible Linking Format
+             #endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Extensible Linking Format" >/dev/null 2>&1
+then :
+  gl_cv_have_weak="guessing yes"
+else $as_nop
+  gl_cv_have_weak="guessing no"
+fi
+rm -rf conftest*
+
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdio.h>
+#pragma weak fputs
+int main ()
+{
+  return (fputs == NULL);
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_have_weak=yes
+else $as_nop
+  gl_cv_have_weak=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+     fi
+          case " $LDFLAGS " in
+       *" -static "*) gl_cv_have_weak=no ;;
+     esac
+                    case "$gl_cv_have_weak" in
+       *yes)
+         case "$host_os" in
+           freebsd* | dragonfly* | midnightbsd*)
+             : > conftest1.c
+             $CC $CPPFLAGS $CFLAGS $LDFLAGS -fPIC -shared -o libempty.so conftest1.c -lpthread >&5 2>&1
+             cat <<EOF > conftest2.c
+#include <pthread.h>
+#pragma weak pthread_mutexattr_gettype
+int main ()
+{
+  return (pthread_mutexattr_gettype != NULL);
+}
+EOF
+             $CC $CPPFLAGS $CFLAGS $LDFLAGS -o conftest conftest2.c libempty.so >&5 2>&1 \
+               || gl_cv_have_weak=no
+             rm -f conftest1.c libempty.so conftest2.c conftest
+             ;;
+         esac
+         ;;
+     esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_have_weak" >&5
+printf "%s\n" "$gl_cv_have_weak" >&6; }
+  case "$gl_cv_have_weak" in
+    *yes)
+
+printf "%s\n" "#define HAVE_WEAK_SYMBOLS 1" >>confdefs.h
+
+      ;;
+  esac
+
+        case "$gl_cv_have_weak" in
+          *yes) LIB_MBRTOWC= ;;
+          *)    LIB_MBRTOWC="$LIBPTHREAD" ;;
+        esac
+        ;;
+    esac
+  else
+    LIB_MBRTOWC=
+  fi
+
+
+  if test $HAVE_MBRTOWC = 0 || test $REPLACE_MBRTOWC = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS mbrtowc.$ac_objext"
+
+    if test $REPLACE_MBSTATE_T = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS lc-charset-dispatch.$ac_objext"
+
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS mbtowc-lock.$ac_objext"
+
+
+
+
+  CFLAG_VISIBILITY=
+  HAVE_VISIBILITY=0
+  if test -n "$GCC"; then
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the -Werror option is usable" >&5
+printf %s "checking whether the -Werror option is usable... " >&6; }
+if test ${gl_cv_cc_vis_werror+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -Werror"
+       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_cc_vis_werror=yes
+else $as_nop
+  gl_cv_cc_vis_werror=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+       CFLAGS="$gl_save_CFLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_cc_vis_werror" >&5
+printf "%s\n" "$gl_cv_cc_vis_werror" >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for simple visibility declarations" >&5
+printf %s "checking for simple visibility declarations... " >&6; }
+if test ${gl_cv_cc_visibility+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -fvisibility=hidden"
+                                          if test $gl_cv_cc_vis_werror = yes; then
+         CFLAGS="$CFLAGS -Werror"
+       fi
+       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+extern __attribute__((__visibility__("hidden"))) int hiddenvar;
+              extern __attribute__((__visibility__("default"))) int exportedvar;
+              extern __attribute__((__visibility__("hidden"))) int hiddenfunc (void);
+              extern __attribute__((__visibility__("default"))) int exportedfunc (void);
+              void dummyfunc (void);
+              int hiddenvar;
+              int exportedvar;
+              int hiddenfunc (void) { return 51; }
+              int exportedfunc (void) { return 1225736919; }
+              void dummyfunc (void) {}
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_cc_visibility=yes
+else $as_nop
+  gl_cv_cc_visibility=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+       CFLAGS="$gl_save_CFLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_cc_visibility" >&5
+printf "%s\n" "$gl_cv_cc_visibility" >&6; }
+    if test $gl_cv_cc_visibility = yes; then
+      CFLAG_VISIBILITY="-fvisibility=hidden"
+      HAVE_VISIBILITY=1
+    fi
+  fi
+
+
+
+printf "%s\n" "#define HAVE_VISIBILITY $HAVE_VISIBILITY" >>confdefs.h
+
+
+
+    fi
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_MBRTOWC=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_MBRTOWC 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_MBSCASECMP=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_MBSCASECMP 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+        if case "$host_os" in
+       mingw*) true ;;
+       *) test $ac_cv_func_mbsinit = yes ;;
+     esac \
+    && test $ac_cv_func_mbrtowc = yes; then
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc handles incomplete characters" >&5
+printf %s "checking whether mbrtowc handles incomplete characters... " >&6; }
+if test ${gl_cv_func_mbrtowc_incomplete_state+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                     # Guess no on AIX and OSF/1.
+        aix* | osf*) gl_cv_func_mbrtowc_incomplete_state="guessing no" ;;
+                     # Guess yes otherwise.
+        *)           gl_cv_func_mbrtowc_incomplete_state="guessing yes" ;;
+      esac
+      if test $LOCALE_JA != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      const char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        if (mbsinit (&state))
+          return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_incomplete_state=yes
+else $as_nop
+  gl_cv_func_mbrtowc_incomplete_state=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      else
+        if test $LOCALE_FR_UTF8 != none; then
+          if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      const char input[] = "B\303\274\303\237er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        if (mbsinit (&state))
+          return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_incomplete_state=yes
+else $as_nop
+  gl_cv_func_mbrtowc_incomplete_state=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+        fi
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_incomplete_state" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_incomplete_state" >&6; }
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc works as well as mbtowc" >&5
+printf %s "checking whether mbrtowc works as well as mbtowc... " >&6; }
+if test ${gl_cv_func_mbrtowc_sanitycheck+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                    # Guess no on Solaris 8.
+        solaris2.8) gl_cv_func_mbrtowc_sanitycheck="guessing no" ;;
+                    # Guess yes otherwise.
+        *)          gl_cv_func_mbrtowc_sanitycheck="guessing yes" ;;
+      esac
+      if test $LOCALE_ZH_CN != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  /* This fails on Solaris 8:
+     mbrtowc returns 2, and sets wc to 0x00F0.
+     mbtowc returns 4 (correct) and sets wc to 0x5EDC.  */
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      char input[] = "B\250\271\201\060\211\070er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 3, 6, &state) != 4
+          && mbtowc (&wc, input + 3, 6) == 4)
+        return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_sanitycheck=yes
+else $as_nop
+  gl_cv_func_mbrtowc_sanitycheck=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_sanitycheck" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_sanitycheck" >&6; }
+
+    REPLACE_MBSTATE_T=0
+    case "$gl_cv_func_mbrtowc_incomplete_state" in
+      *yes) ;;
+      *) REPLACE_MBSTATE_T=1 ;;
+    esac
+    case "$gl_cv_func_mbrtowc_sanitycheck" in
+      *yes) ;;
+      *) REPLACE_MBSTATE_T=1 ;;
+    esac
+  else
+    REPLACE_MBSTATE_T=1
+  fi
+
+
+
+  if test $ac_cv_func_mbsinit = no; then
+    HAVE_MBSINIT=0
+    ac_fn_check_decl "$LINENO" "mbsinit" "ac_cv_have_decl_mbsinit" "
+      #include <wchar.h>
+
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_mbsinit" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_MBSINIT $ac_have_decl" >>confdefs.h
+
+    if test $ac_cv_have_decl_mbsinit = yes; then
+                        REPLACE_MBSINIT=1
+    fi
+  else
+    if test $REPLACE_MBSTATE_T = 1; then
+      REPLACE_MBSINIT=1
+    else
+                        case "$host_os" in
+        mingw*) REPLACE_MBSINIT=1 ;;
+      esac
+    fi
+  fi
+
+  if test $HAVE_MBSINIT = 0 || test $REPLACE_MBSINIT = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS mbsinit.$ac_objext"
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_MBSINIT=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_MBSINIT 1" >>confdefs.h
+
+
+
+
+
+
+  if test $ac_cv_func_mbslen = yes; then
+    HAVE_MBSLEN=1
+  else
+    HAVE_MBSLEN=0
+  fi
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_MBSLEN=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_MBSLEN 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+        if case "$host_os" in
+       mingw*) true ;;
+       *) test $ac_cv_func_mbsinit = yes ;;
+     esac \
+    && test $ac_cv_func_mbrtowc = yes; then
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc handles incomplete characters" >&5
+printf %s "checking whether mbrtowc handles incomplete characters... " >&6; }
+if test ${gl_cv_func_mbrtowc_incomplete_state+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                     # Guess no on AIX and OSF/1.
+        aix* | osf*) gl_cv_func_mbrtowc_incomplete_state="guessing no" ;;
+                     # Guess yes otherwise.
+        *)           gl_cv_func_mbrtowc_incomplete_state="guessing yes" ;;
+      esac
+      if test $LOCALE_JA != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      const char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        if (mbsinit (&state))
+          return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_incomplete_state=yes
+else $as_nop
+  gl_cv_func_mbrtowc_incomplete_state=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      else
+        if test $LOCALE_FR_UTF8 != none; then
+          if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      const char input[] = "B\303\274\303\237er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        if (mbsinit (&state))
+          return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_incomplete_state=yes
+else $as_nop
+  gl_cv_func_mbrtowc_incomplete_state=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+        fi
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_incomplete_state" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_incomplete_state" >&6; }
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc works as well as mbtowc" >&5
+printf %s "checking whether mbrtowc works as well as mbtowc... " >&6; }
+if test ${gl_cv_func_mbrtowc_sanitycheck+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                    # Guess no on Solaris 8.
+        solaris2.8) gl_cv_func_mbrtowc_sanitycheck="guessing no" ;;
+                    # Guess yes otherwise.
+        *)          gl_cv_func_mbrtowc_sanitycheck="guessing yes" ;;
+      esac
+      if test $LOCALE_ZH_CN != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  /* This fails on Solaris 8:
+     mbrtowc returns 2, and sets wc to 0x00F0.
+     mbtowc returns 4 (correct) and sets wc to 0x5EDC.  */
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      char input[] = "B\250\271\201\060\211\070er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 3, 6, &state) != 4
+          && mbtowc (&wc, input + 3, 6) == 4)
+        return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_sanitycheck=yes
+else $as_nop
+  gl_cv_func_mbrtowc_sanitycheck=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_sanitycheck" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_sanitycheck" >&6; }
+
+    REPLACE_MBSTATE_T=0
+    case "$gl_cv_func_mbrtowc_incomplete_state" in
+      *yes) ;;
+      *) REPLACE_MBSTATE_T=1 ;;
+    esac
+    case "$gl_cv_func_mbrtowc_sanitycheck" in
+      *yes) ;;
+      *) REPLACE_MBSTATE_T=1 ;;
+    esac
+  else
+    REPLACE_MBSTATE_T=1
+  fi
+
+
+
+  if test $ac_cv_func_mbsrtowcs = no; then
+    HAVE_MBSRTOWCS=0
+    ac_fn_check_decl "$LINENO" "mbsrtowcs" "ac_cv_have_decl_mbsrtowcs" "
+      #include <wchar.h>
+
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_mbsrtowcs" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_MBSRTOWCS $ac_have_decl" >>confdefs.h
+
+    if test $ac_cv_have_decl_mbsrtowcs = yes; then
+                        REPLACE_MBSRTOWCS=1
+    fi
+  else
+    if test $REPLACE_MBSTATE_T = 1; then
+      REPLACE_MBSRTOWCS=1
+    else
+
+
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbsrtowcs works" >&5
+printf %s "checking whether mbsrtowcs works... " >&6; }
+if test ${gl_cv_func_mbsrtowcs_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                                   # Guess no on HP-UX, Solaris, mingw.
+        hpux* | solaris* | mingw*) gl_cv_func_mbsrtowcs_works="guessing no" ;;
+                                   # Guess yes otherwise.
+        *)                         gl_cv_func_mbsrtowcs_works="guessing yes" ;;
+      esac
+      if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  int result = 0;
+  /* Test whether the function supports a NULL destination argument.
+     This fails on native Windows.  */
+  if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
+    {
+      const char input[] = "\337er";
+      const char *src = input;
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbsrtowcs (NULL, &src, 1, &state) != 3
+          || src != input)
+        result |= 1;
+    }
+  /* Test whether the function works when started with a conversion state
+     in non-initial state.  This fails on HP-UX 11.11 and Solaris 10.  */
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      const char input[] = "B\303\274\303\237er";
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (NULL, input + 1, 1, &state) == (size_t)(-2))
+        if (!mbsinit (&state))
+          {
+            const char *src = input + 2;
+            if (mbsrtowcs (NULL, &src, 10, &state) != 4)
+              result |= 2;
+          }
+    }
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      const char input[] = "<\306\374\313\334\270\354>";
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (NULL, input + 3, 1, &state) == (size_t)(-2))
+        if (!mbsinit (&state))
+          {
+            const char *src = input + 4;
+            if (mbsrtowcs (NULL, &src, 10, &state) != 3)
+              result |= 4;
+          }
+    }
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      const char input[] = "B\250\271\201\060\211\070er";
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (NULL, input + 1, 1, &state) == (size_t)(-2))
+        if (!mbsinit (&state))
+          {
+            const char *src = input + 2;
+            if (mbsrtowcs (NULL, &src, 10, &state) != 4)
+              result |= 8;
+          }
+    }
+  return result;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbsrtowcs_works=yes
+else $as_nop
+  gl_cv_func_mbsrtowcs_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbsrtowcs_works" >&5
+printf "%s\n" "$gl_cv_func_mbsrtowcs_works" >&6; }
+
+      case "$gl_cv_func_mbsrtowcs_works" in
+        *yes) ;;
+        *) REPLACE_MBSRTOWCS=1 ;;
+      esac
+    fi
+  fi
+
+  if test $HAVE_MBSRTOWCS = 0 || test $REPLACE_MBSRTOWCS = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS mbsrtowcs.$ac_objext"
+
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS mbsrtowcs-state.$ac_objext"
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_MBSRTOWCS=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_MBSRTOWCS 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_MBSSTR=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_MBSSTR 1" >>confdefs.h
+
+
+
+
+
+
+  ac_fn_c_check_func "$LINENO" "mbtowc" "ac_cv_func_mbtowc"
+if test "x$ac_cv_func_mbtowc" = xyes
+then :
+  printf "%s\n" "#define HAVE_MBTOWC 1" >>confdefs.h
+
+fi
+
+  if test $ac_cv_func_mbtowc = no; then
+    HAVE_MBTOWC=0
+  else
+    if false; then
+      REPLACE_MBTOWC=1
+    fi
+  fi
+
+  if test $HAVE_MBTOWC = 0 || test $REPLACE_MBTOWC = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS mbtowc.$ac_objext"
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_MBTOWC=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_MBTOWC 1" >>confdefs.h
+
+
+
+
+
+  :
+
+
+  if test $REPLACE_MEMCHR = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS memchr.$ac_objext"
+
+
+  ac_fn_c_check_header_compile "$LINENO" "bp-sym.h" "ac_cv_header_bp_sym_h" "$ac_includes_default"
+if test "x$ac_cv_header_bp_sym_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_BP_SYM_H 1" >>confdefs.h
+
+fi
+
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_MEMCHR=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_MEMCHR 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+  ac_fn_c_check_func "$LINENO" "mempcpy" "ac_cv_func_mempcpy"
+if test "x$ac_cv_func_mempcpy" = xyes
+then :
+  printf "%s\n" "#define HAVE_MEMPCPY 1" >>confdefs.h
+
+fi
+
+  if test $ac_cv_func_mempcpy = no; then
+    HAVE_MEMPCPY=0
+  fi
+
+  if test $HAVE_MEMPCPY = 0; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS mempcpy.$ac_objext"
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_MEMPCPY=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_MEMPCPY 1" >>confdefs.h
+
+
+
+
+
+
+
+
+  if test $ac_cv_have_decl_memrchr = no; then
+    HAVE_DECL_MEMRCHR=0
+  fi
+
+  ac_fn_c_check_func "$LINENO" "memrchr" "ac_cv_func_memrchr"
+if test "x$ac_cv_func_memrchr" = xyes
+then :
+  printf "%s\n" "#define HAVE_MEMRCHR 1" >>confdefs.h
+
+fi
+
+
+  if test $ac_cv_func_memrchr = no; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS memrchr.$ac_objext"
+
+    :
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_MEMRCHR=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_MEMRCHR 1" >>confdefs.h
+
+
+
+
+
+
+
+  if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS msvc-inval.$ac_objext"
+
+  fi
+
+  if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS msvc-nothrow.$ac_objext"
+
+  fi
+
+
+printf "%s\n" "#define GNULIB_MSVC_NOTHROW 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+  if test $ac_cv_func_nl_langinfo = yes; then
+    # On Irix 6.5, YESEXPR is defined, but nl_langinfo(YESEXPR) is broken.
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether YESEXPR works" >&5
+printf %s "checking whether YESEXPR works... " >&6; }
+if test ${gl_cv_func_nl_langinfo_yesexpr_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+
+         case "$host_os" in
+                   # Guess no on irix systems.
+           irix*)  gl_cv_func_nl_langinfo_yesexpr_works="guessing no";;
+                   # Guess yes elsewhere.
+           *)      gl_cv_func_nl_langinfo_yesexpr_works="guessing yes";;
+         esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <langinfo.h>
+
+int
+main (void)
+{
+return !*nl_langinfo(YESEXPR);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_nl_langinfo_yesexpr_works=yes
+else $as_nop
+  gl_cv_func_nl_langinfo_yesexpr_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_nl_langinfo_yesexpr_works" >&5
+printf "%s\n" "$gl_cv_func_nl_langinfo_yesexpr_works" >&6; }
+    case $gl_cv_func_nl_langinfo_yesexpr_works in
+      *yes) FUNC_NL_LANGINFO_YESEXPR_WORKS=1 ;;
+      *)    FUNC_NL_LANGINFO_YESEXPR_WORKS=0 ;;
+    esac
+
+printf "%s\n" "#define FUNC_NL_LANGINFO_YESEXPR_WORKS $FUNC_NL_LANGINFO_YESEXPR_WORKS" >>confdefs.h
+
+    # On Solaris 10 and Solaris 11.3, nl_langinfo is not multithread-safe.
+    case "$host_os" in
+      solaris*) NL_LANGINFO_MTSAFE=0 ;;
+      *)        NL_LANGINFO_MTSAFE=1 ;;
+    esac
+
+printf "%s\n" "#define NL_LANGINFO_MTSAFE $NL_LANGINFO_MTSAFE" >>confdefs.h
+
+    if test $HAVE_LANGINFO_CODESET = 1 \
+       && test $HAVE_LANGINFO_T_FMT_AMPM = 1 \
+       && test $HAVE_LANGINFO_ALTMON = 1 \
+       && test $HAVE_LANGINFO_ERA = 1 \
+       && test $FUNC_NL_LANGINFO_YESEXPR_WORKS = 1 \
+       && test $NL_LANGINFO_MTSAFE = 1; then
+      :
+    else
+      REPLACE_NL_LANGINFO=1
+
+printf "%s\n" "#define REPLACE_NL_LANGINFO 1" >>confdefs.h
+
+    fi
+  else
+    HAVE_NL_LANGINFO=0
+  fi
+  if test $HAVE_NL_LANGINFO = 0 || test $HAVE_LANGINFO_CODESET = 0; then
+    LIB_NL_LANGINFO="$LIB_SETLOCALE_NULL"
+  else
+    LIB_NL_LANGINFO=
+  fi
+
+
+  if test $HAVE_NL_LANGINFO = 0 || test $REPLACE_NL_LANGINFO = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS nl_langinfo.$ac_objext"
+
+  fi
+  if test $REPLACE_NL_LANGINFO = 1 && test $NL_LANGINFO_MTSAFE = 0; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS nl_langinfo-lock.$ac_objext"
+
+
+
+
+  CFLAG_VISIBILITY=
+  HAVE_VISIBILITY=0
+  if test -n "$GCC"; then
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the -Werror option is usable" >&5
+printf %s "checking whether the -Werror option is usable... " >&6; }
+if test ${gl_cv_cc_vis_werror+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -Werror"
+       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_cc_vis_werror=yes
+else $as_nop
+  gl_cv_cc_vis_werror=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+       CFLAGS="$gl_save_CFLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_cc_vis_werror" >&5
+printf "%s\n" "$gl_cv_cc_vis_werror" >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for simple visibility declarations" >&5
+printf %s "checking for simple visibility declarations... " >&6; }
+if test ${gl_cv_cc_visibility+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -fvisibility=hidden"
+                                          if test $gl_cv_cc_vis_werror = yes; then
+         CFLAGS="$CFLAGS -Werror"
+       fi
+       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+extern __attribute__((__visibility__("hidden"))) int hiddenvar;
+              extern __attribute__((__visibility__("default"))) int exportedvar;
+              extern __attribute__((__visibility__("hidden"))) int hiddenfunc (void);
+              extern __attribute__((__visibility__("default"))) int exportedfunc (void);
+              void dummyfunc (void);
+              int hiddenvar;
+              int exportedvar;
+              int hiddenfunc (void) { return 51; }
+              int exportedfunc (void) { return 1225736919; }
+              void dummyfunc (void) {}
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_cc_visibility=yes
+else $as_nop
+  gl_cv_cc_visibility=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+       CFLAGS="$gl_save_CFLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_cc_visibility" >&5
+printf "%s\n" "$gl_cv_cc_visibility" >&6; }
+    if test $gl_cv_cc_visibility = yes; then
+      CFLAG_VISIBILITY="-fvisibility=hidden"
+      HAVE_VISIBILITY=1
+    fi
+  fi
+
+
+
+printf "%s\n" "#define HAVE_VISIBILITY $HAVE_VISIBILITY" >>confdefs.h
+
+
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_NL_LANGINFO=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_NL_LANGINFO 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for obstacks that work with any size object" >&5
+printf %s "checking for obstacks that work with any size object... " >&6; }
+if test ${ac_cv_func_obstack+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include "obstack.h"
+             void *obstack_chunk_alloc (size_t n) { return 0; }
+             void obstack_chunk_free (void *p) { }
+             /* Check that an internal function returns size_t, not int.  */
+             size_t _obstack_memory_used (struct obstack *);
+
+int
+main (void)
+{
+struct obstack mem;
+             obstack_init (&mem);
+             obstack_free (&mem, 0);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_func_obstack=yes
+else $as_nop
+  ac_cv_func_obstack=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_obstack" >&5
+printf "%s\n" "$ac_cv_func_obstack" >&6; }
+   if test "$ac_cv_func_obstack" = yes; then
+
+printf "%s\n" "#define HAVE_OBSTACK 1" >>confdefs.h
+
+   else
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS obstack.$ac_objext"
+
+   fi
+
+
+
+
+  case "$host_os" in
+    mingw* | pw*)
+      REPLACE_OPEN=1
+      ;;
+    *)
+
+      if test "$gl_cv_macro_O_CLOEXEC" != yes; then
+        REPLACE_OPEN=1
+      fi
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether open recognizes a trailing slash" >&5
+printf %s "checking whether open recognizes a trailing slash... " >&6; }
+if test ${gl_cv_func_open_slash+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  # Assume that if we have lstat, we can also check symlinks.
+     if test $ac_cv_func_lstat = yes; then
+       touch conftest.tmp
+       ln -s conftest.tmp conftest.lnk
+     fi
+     if test "$cross_compiling" = yes
+then :
+
+        case "$host_os" in
+          freebsd* | aix* | hpux* | solaris2.[0-9] | solaris2.[0-9].*)
+            gl_cv_func_open_slash="guessing no" ;;
+          *)
+            gl_cv_func_open_slash="guessing yes" ;;
+        esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <fcntl.h>
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+
+$gl_mda_defines
+
+int main ()
+{
+  int result = 0;
+#if HAVE_LSTAT
+  if (open ("conftest.lnk/", O_RDONLY) != -1)
+    result |= 1;
+#endif
+  if (open ("conftest.sl/", O_CREAT, 0600) >= 0)
+    result |= 2;
+  return result;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_open_slash=yes
+else $as_nop
+  gl_cv_func_open_slash=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+     rm -f conftest.sl conftest.tmp conftest.lnk
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_open_slash" >&5
+printf "%s\n" "$gl_cv_func_open_slash" >&6; }
+  case "$gl_cv_func_open_slash" in
+    *no)
+
+printf "%s\n" "#define OPEN_TRAILING_SLASH_BUG 1" >>confdefs.h
+
+      ;;
+  esac
+
+      case "$gl_cv_func_open_slash" in
+        *no)
+          REPLACE_OPEN=1
+          ;;
+      esac
+      ;;
+  esac
+
+    if test $REPLACE_OPEN = 0; then
+
+
+
+  if test $ac_cv_func_fchdir = no; then
+    HAVE_FCHDIR=0
+  fi
+
+      if test $HAVE_FCHDIR = 0; then
+        REPLACE_OPEN=1
+      fi
+    fi
+
+
+
+  if test $REPLACE_OPEN = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS open.$ac_objext"
+
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_OPEN=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_OPEN 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+  case $ac_cv_func_openat+$gl_cv_func_lstat_dereferences_slashed_symlink+$gl_cv_macro_O_CLOEXEC in
+  yes+*yes+yes)
+    ;;
+  yes+*)
+    # Solaris 10 lacks O_CLOEXEC.
+    # Solaris 9 has *at functions, but uniformly mishandles trailing
+    # slash in all of them.
+    REPLACE_OPENAT=1
+    ;;
+  *)
+    HAVE_OPENAT=0
+    ;;
+  esac
+
+  if test $HAVE_OPENAT = 0 || test $REPLACE_OPENAT = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS openat.$ac_objext"
+
+
+
+  :
+
+  fi
+
+
+printf "%s\n" "#define GNULIB_OPENAT 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_OPENAT=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_OPENAT 1" >>confdefs.h
+
+
+
+
+
+
+
+
+printf "%s\n" "#define GNULIB_OPENAT_SAFER 1" >>confdefs.h
+
+
+
+
+
+  ac_fn_c_check_func "$LINENO" "opendir" "ac_cv_func_opendir"
+if test "x$ac_cv_func_opendir" = xyes
+then :
+  printf "%s\n" "#define HAVE_OPENDIR 1" >>confdefs.h
+
+fi
+
+  if test $ac_cv_func_opendir = no; then
+    HAVE_OPENDIR=0
+  fi
+
+
+
+
+  if test $ac_cv_func_fchdir = no; then
+    HAVE_FCHDIR=0
+  fi
+
+    if test $HAVE_FCHDIR = 0; then
+      if test $HAVE_OPENDIR = 1; then
+        REPLACE_OPENDIR=1
+      fi
+    fi
+
+      case $host_os,$HAVE_OPENDIR in
+    os2*,1)
+      REPLACE_OPENDIR=1;;
+  esac
+
+  if test $HAVE_OPENDIR = 0 || test $REPLACE_OPENDIR = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS opendir.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_OPENDIR=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_OPENDIR 1" >>confdefs.h
+
+
+
+
+
+
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for perl5.005 or newer" >&5
+printf %s "checking for perl5.005 or newer... " >&6; }
+  if test "${PERL+set}" = set; then
+    # 'PERL' is set in the user's environment.
+    candidate_perl_names="$PERL"
+    perl_specified=yes
+  else
+    candidate_perl_names='perl perl5'
+    perl_specified=no
+  fi
+
+  found=no
+
+  PERL="$am_missing_run perl"
+  for perl in $candidate_perl_names; do
+    # Run test in a subshell; some versions of sh will print an error if
+    # an executable is not found, even if stderr is redirected.
+    if ( $perl -e 'require 5.005; use File::Compare; use warnings;' ) > /dev/null 2>&1; then
+      PERL=$perl
+      found=yes
+      break
+    fi
+  done
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $found" >&5
+printf "%s\n" "$found" >&6; }
+  test $found = no && { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING:
+WARNING: You don't seem to have perl5.005 or newer installed, or you lack
+         a usable version of the Perl File::Compare module.  As a result,
+         you may be unable to run a few tests or to regenerate certain
+         files if you modify the sources from which they are derived.
+ " >&5
+printf "%s\n" "$as_me: WARNING:
+WARNING: You don't seem to have perl5.005 or newer installed, or you lack
+         a usable version of the Perl File::Compare module.  As a result,
+         you may be unable to run a few tests or to regenerate certain
+         files if you modify the sources from which they are derived.
+ " >&2;}
+
+
+
+
+
+  if test $ac_cv_func_pipe != yes; then
+    HAVE_PIPE=0
+  fi
+
+  if test $HAVE_PIPE = 0; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS pipe.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_PIPE=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_PIPE 1" >>confdefs.h
+
+
+
+
+
+  XGETTEXT_EXTRA_OPTIONS="$XGETTEXT_EXTRA_OPTIONS --keyword='proper_name:1,\"This is a proper name. See the gettext manual, section Names.\"'"
+
+
+
+  XGETTEXT_EXTRA_OPTIONS="$XGETTEXT_EXTRA_OPTIONS --keyword='proper_name_utf8:1,\"This is a proper name. See the gettext manual, section Names.\"'"
+
+
+      :
+
+
+
+  :
+
+
+
+
+  ac_fn_c_check_func "$LINENO" "raise" "ac_cv_func_raise"
+if test "x$ac_cv_func_raise" = xyes
+then :
+  printf "%s\n" "#define HAVE_RAISE 1" >>confdefs.h
+
+fi
+
+  if test $ac_cv_func_raise = no; then
+    HAVE_RAISE=0
+  else
+
+
+      if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+        REPLACE_RAISE=1
+      fi
+
+
+
+
+
+  HAVE_POSIX_SIGNALBLOCKING=0
+  if test "$gl_cv_type_sigset_t" = yes; then
+    ac_fn_c_check_func "$LINENO" "sigprocmask" "ac_cv_func_sigprocmask"
+if test "x$ac_cv_func_sigprocmask" = xyes
+then :
+  HAVE_POSIX_SIGNALBLOCKING=1
+fi
+
+  fi
+
+      if test $HAVE_POSIX_SIGNALBLOCKING = 0; then
+        :
+      fi
+
+  fi
+
+  if test $HAVE_RAISE = 0 || test $REPLACE_RAISE = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS raise.$ac_objext"
+
+    :
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_RAISE=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_RAISE 1" >>confdefs.h
+
+
+
+
+
+
+
+  ac_fn_c_check_func "$LINENO" "rawmemchr" "ac_cv_func_rawmemchr"
+if test "x$ac_cv_func_rawmemchr" = xyes
+then :
+  printf "%s\n" "#define HAVE_RAWMEMCHR 1" >>confdefs.h
+
+fi
+
+  if test $ac_cv_func_rawmemchr = no; then
+    HAVE_RAWMEMCHR=0
+  fi
+
+  if test $HAVE_RAWMEMCHR = 0; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS rawmemchr.$ac_objext"
+
+    :
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_RAWMEMCHR=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_RAWMEMCHR 1" >>confdefs.h
+
+
+
+
+
+
+
+    if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+      REPLACE_READ=1
+    fi
+
+
+
+  if test $REPLACE_READ = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS read.$ac_objext"
+
+    :
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_READ=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_READ 1" >>confdefs.h
+
+
+
+
+
+
+  ac_fn_c_check_func "$LINENO" "readdir" "ac_cv_func_readdir"
+if test "x$ac_cv_func_readdir" = xyes
+then :
+  printf "%s\n" "#define HAVE_READDIR 1" >>confdefs.h
+
+fi
+
+  if test $ac_cv_func_readdir = no; then
+    HAVE_READDIR=0
+  fi
+
+  if test $HAVE_READDIR = 0; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS readdir.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_READDIR=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_READDIR 1" >>confdefs.h
+
+
+
+
+
+
+  if test $REPLACE_REALLOC = 0; then
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether realloc (0, 0) returns nonnull" >&5
+printf %s "checking whether realloc (0, 0) returns nonnull... " >&6; }
+if test ${ac_cv_func_realloc_0_nonnull+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+          # Guess yes on platforms where we know the result.
+          *-gnu* | freebsd* | netbsd* | openbsd* | bitrig* \
+          | gnu* | *-musl* | midnightbsd* \
+          | hpux* | solaris* | cygwin* | mingw* | msys* )
+            ac_cv_func_realloc_0_nonnull="guessing yes" ;;
+          # If we don't know, obey --enable-cross-guesses.
+          *) ac_cv_func_realloc_0_nonnull="$gl_cross_guess_normal" ;;
+        esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdlib.h>
+
+int
+main (void)
+{
+void *p = realloc (0, 0);
+            int result = !p;
+            free (p);
+            return result;
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  ac_cv_func_realloc_0_nonnull=yes
+else $as_nop
+  ac_cv_func_realloc_0_nonnull=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_realloc_0_nonnull" >&5
+printf "%s\n" "$ac_cv_func_realloc_0_nonnull" >&6; }
+  case $ac_cv_func_realloc_0_nonnull in #(
+  *yes) :
+     ;; #(
+  *) :
+    REPLACE_REALLOC=1 ;;
+esac
+
+  fi
+
+  if test $REPLACE_REALLOC = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS realloc.$ac_objext"
+
+  fi
+
+
+
+  if test $REPLACE_MALLOC = 1; then
+    REPLACE_REALLOC=1
+  fi
+
+  if test $REPLACE_REALLOC = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS realloc.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_REALLOC_POSIX=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_REALLOC_POSIX 1" >>confdefs.h
+
+
+
+
+
+
+
+
+  ac_fn_c_check_func "$LINENO" "reallocarray" "ac_cv_func_reallocarray"
+if test "x$ac_cv_func_reallocarray" = xyes
+then :
+  printf "%s\n" "#define HAVE_REALLOCARRAY 1" >>confdefs.h
+
+fi
+
+  if test "$ac_cv_func_reallocarray" = no; then
+    HAVE_REALLOCARRAY=0
+  elif test "$gl_cv_malloc_ptrdiff" = no; then
+    REPLACE_REALLOCARRAY=1
+  fi
+
+  if test $HAVE_REALLOCARRAY = 0 || test $REPLACE_REALLOCARRAY = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS reallocarray.$ac_objext"
+
+    :
+  fi
+
+
+printf "%s\n" "#define GNULIB_REALLOCARRAY 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_REALLOCARRAY=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_REALLOCARRAY 1" >>confdefs.h
+
+
+
+
+
+# Check whether --with-included-regex was given.
+if test ${with_included_regex+y}
+then :
+  withval=$with_included_regex;
+fi
+
+
+  case $with_included_regex in #(
+  yes|no) ac_use_included_regex=$with_included_regex
+        ;;
+  '')
+    # If the system regex support is good enough that it passes the
+    # following run test, then default to *not* using the included regex.c.
+    # If cross compiling, assume the test would fail and use the included
+    # regex.c.
+
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working re_compile_pattern" >&5
+printf %s "checking for working re_compile_pattern... " >&6; }
+if test ${gl_cv_func_re_compile_pattern_working+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                   # Guess no on native Windows.
+           mingw*) gl_cv_func_re_compile_pattern_working="guessing no" ;;
+                   # Otherwise obey --enable-cross-guesses.
+           *)      gl_cv_func_re_compile_pattern_working="$gl_cross_guess_normal" ;;
+         esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <regex.h>
+
+            #include <locale.h>
+            #include <limits.h>
+            #include <string.h>
+
+            #if defined M_CHECK_ACTION || HAVE_DECL_ALARM
+            # include <signal.h>
+            # include <unistd.h>
+            #endif
+
+            #if HAVE_MALLOC_H
+            # include <malloc.h>
+            #endif
+
+            #ifdef M_CHECK_ACTION
+            /* Exit with distinguishable exit code.  */
+            static void sigabrt_no_core (int sig) { raise (SIGTERM); }
+            #endif
+
+int
+main (void)
+{
+int result = 0;
+            static struct re_pattern_buffer regex;
+            unsigned char folded_chars[UCHAR_MAX + 1];
+            int i;
+            const char *s;
+            struct re_registers regs;
+
+            /* Some builds of glibc go into an infinite loop on this
+               test.  Use alarm to force death, and mallopt to avoid
+               malloc recursion in diagnosing the corrupted heap. */
+#if HAVE_DECL_ALARM
+            signal (SIGALRM, SIG_DFL);
+            alarm (2);
+#endif
+#ifdef M_CHECK_ACTION
+            signal (SIGABRT, sigabrt_no_core);
+            mallopt (M_CHECK_ACTION, 2);
+#endif
+
+            if (setlocale (LC_ALL, "en_US.UTF-8"))
+              {
+                {
+                  /* https://sourceware.org/ml/libc-hacker/2006-09/msg00008.html
+                     This test needs valgrind to catch the bug on Debian
+                     GNU/Linux 3.1 x86, but it might catch the bug better
+                     on other platforms and it shouldn't hurt to try the
+                     test here.  */
+                  static char const pat[] = "insert into";
+                  static char const data[] =
+                    "\xFF\0\x12\xA2\xAA\xC4\xB1,K\x12\xC4\xB1*\xACK";
+                  re_set_syntax (RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE
+                                 | RE_ICASE);
+                  memset (&regex, 0, sizeof regex);
+                  s = re_compile_pattern (pat, sizeof pat - 1, &regex);
+                  if (s)
+                    result |= 1;
+                  else
+                    {
+                      if (re_search (&regex, data, sizeof data - 1,
+                                     0, sizeof data - 1, &regs)
+                          != -1)
+                        result |= 1;
+                      regfree (&regex);
+                    }
+                }
+
+                {
+                  /* This test is from glibc bug 15078.
+                     The test case is from Andreas Schwab in
+                     <https://sourceware.org/ml/libc-alpha/2013-01/msg00967.html>.
+                     */
+                  static char const pat[] = "[^x]x";
+                  static char const data[] =
+                    /* <U1000><U103B><U103D><U1014><U103A><U102F><U1015><U103A> */
+                    "\xe1\x80\x80"
+                    "\xe1\x80\xbb"
+                    "\xe1\x80\xbd"
+                    "\xe1\x80\x94"
+                    "\xe1\x80\xba"
+                    "\xe1\x80\xaf"
+                    "\xe1\x80\x95"
+                    "\xe1\x80\xba"
+                    "x";
+                  re_set_syntax (0);
+                  memset (&regex, 0, sizeof regex);
+                  s = re_compile_pattern (pat, sizeof pat - 1, &regex);
+                  if (s)
+                    result |= 1;
+                  else
+                    {
+                      i = re_search (&regex, data, sizeof data - 1,
+                                     0, sizeof data - 1, 0);
+                      if (i != 0 && i != 21)
+                        result |= 1;
+                      regfree (&regex);
+                    }
+                }
+
+                if (! setlocale (LC_ALL, "C"))
+                  return 1;
+              }
+
+            /* This test is from glibc bug 3957, reported by Andrew Mackey.  */
+            re_set_syntax (RE_SYNTAX_EGREP | RE_HAT_LISTS_NOT_NEWLINE);
+            memset (&regex, 0, sizeof regex);
+            s = re_compile_pattern ("a[^x]b", 6, &regex);
+            if (s)
+              result |= 2;
+            else
+              {
+                /* This should fail, but succeeds for glibc-2.5.  */
+                if (re_search (&regex, "a\nb", 3, 0, 3, &regs) != -1)
+                  result |= 2;
+                regfree (&regex);
+              }
+
+            /* This regular expression is from Spencer ere test number 75
+               in grep-2.3.  */
+            re_set_syntax (RE_SYNTAX_POSIX_EGREP);
+            memset (&regex, 0, sizeof regex);
+            for (i = 0; i <= UCHAR_MAX; i++)
+              folded_chars[i] = i;
+            regex.translate = folded_chars;
+            s = re_compile_pattern ("a[[:]:]]b\n", 11, &regex);
+            /* This should fail with _Invalid character class name_ error.  */
+            if (!s)
+              {
+                result |= 4;
+                regfree (&regex);
+              }
+
+            /* Ensure that [b-a] is diagnosed as invalid, when
+               using RE_NO_EMPTY_RANGES. */
+            re_set_syntax (RE_SYNTAX_POSIX_EGREP | RE_NO_EMPTY_RANGES);
+            memset (&regex, 0, sizeof regex);
+            s = re_compile_pattern ("a[b-a]", 6, &regex);
+            if (s == 0)
+              {
+                result |= 8;
+                regfree (&regex);
+              }
+
+            /* This should succeed, but does not for glibc-2.1.3.  */
+            memset (&regex, 0, sizeof regex);
+            s = re_compile_pattern ("{1", 2, &regex);
+            if (s)
+              result |= 8;
+            else
+              regfree (&regex);
+
+            /* The following example is derived from a problem report
+               against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>.  */
+            memset (&regex, 0, sizeof regex);
+            s = re_compile_pattern ("[an\371]*n", 7, &regex);
+            if (s)
+              result |= 8;
+            else
+              {
+                /* This should match, but does not for glibc-2.2.1.  */
+                if (re_match (&regex, "an", 2, 0, &regs) != 2)
+                  result |= 8;
+                else
+                  {
+                    free (regs.start);
+                    free (regs.end);
+                  }
+                regfree (&regex);
+              }
+
+            memset (&regex, 0, sizeof regex);
+            s = re_compile_pattern ("x", 1, &regex);
+            if (s)
+              result |= 8;
+            else
+              {
+                /* glibc-2.2.93 does not work with a negative RANGE argument.  */
+                if (re_search (&regex, "wxy", 3, 2, -2, &regs) != 1)
+                  result |= 8;
+                else
+                  {
+                    free (regs.start);
+                    free (regs.end);
+                  }
+                regfree (&regex);
+              }
+
+            /* The version of regex.c in older versions of gnulib
+               ignored RE_ICASE.  Detect that problem too.  */
+            re_set_syntax (RE_SYNTAX_EMACS | RE_ICASE);
+            memset (&regex, 0, sizeof regex);
+            s = re_compile_pattern ("x", 1, &regex);
+            if (s)
+              result |= 16;
+            else
+              {
+                if (re_search (&regex, "WXY", 3, 0, 3, &regs) < 0)
+                  result |= 16;
+                else
+                  {
+                    free (regs.start);
+                    free (regs.end);
+                  }
+                regfree (&regex);
+              }
+
+            /* Catch a bug reported by Vin Shelton in
+               https://lists.gnu.org/r/bug-coreutils/2007-06/msg00089.html
+               */
+            re_set_syntax (RE_SYNTAX_POSIX_BASIC
+                           & ~RE_CONTEXT_INVALID_DUP
+                           & ~RE_NO_EMPTY_RANGES);
+            memset (&regex, 0, sizeof regex);
+            s = re_compile_pattern ("[[:alnum:]_-]\\\\+\$", 16, &regex);
+            if (s)
+              result |= 32;
+            else
+              regfree (&regex);
+
+            /* REG_STARTEND was added to glibc on 2004-01-15.
+               Reject older versions.  */
+            if (! REG_STARTEND)
+              result |= 64;
+
+            /* Matching with the compiled form of this regexp would provoke
+               an assertion failure prior to glibc-2.28:
+                 regexec.c:1375: pop_fail_stack: Assertion 'num >= 0' failed
+               With glibc-2.28, compilation fails and reports the invalid
+               back reference.  */
+            re_set_syntax (RE_SYNTAX_POSIX_EGREP);
+            memset (&regex, 0, sizeof regex);
+            s = re_compile_pattern ("0|()0|\\\\1|0", 10, &regex);
+            if (!s)
+              {
+                memset (&regs, 0, sizeof regs);
+                i = re_search (&regex, "x", 1, 0, 1, &regs);
+                if (i != -1)
+                  result |= 64;
+                if (0 <= i)
+                  {
+                    free (regs.start);
+                    free (regs.end);
+                  }
+                regfree (&regex);
+              }
+            else
+              {
+                if (strcmp (s, "Invalid back reference"))
+                  result |= 64;
+              }
+
+            /* glibc bug 11053.  */
+            re_set_syntax (RE_SYNTAX_POSIX_BASIC);
+            memset (&regex, 0, sizeof regex);
+            static char const pat_sub2[] = "\\\\(a*\\\\)*a*\\\\1";
+            s = re_compile_pattern (pat_sub2, sizeof pat_sub2 - 1, &regex);
+            if (s)
+              result |= 64;
+            else
+              {
+                memset (&regs, 0, sizeof regs);
+                static char const data[] = "a";
+                int datalen = sizeof data - 1;
+                i = re_search (&regex, data, datalen, 0, datalen, &regs);
+                if (i != 0)
+                  result |= 64;
+                else if (regs.num_regs < 2)
+                  result |= 64;
+                else if (! (regs.start[0] == 0 && regs.end[0] == 1))
+                  result |= 64;
+                else if (! (regs.start[1] == 0 && regs.end[1] == 0))
+                  result |= 64;
+                regfree (&regex);
+                free (regs.start);
+                free (regs.end);
+              }
+
+#if 0
+            /* It would be nice to reject hosts whose regoff_t values are too
+               narrow (including glibc on hosts with 64-bit ptrdiff_t and
+               32-bit int), but we should wait until glibc implements this
+               feature.  Otherwise, support for equivalence classes and
+               multibyte collation symbols would always be broken except
+               when compiling --without-included-regex.   */
+            if (sizeof (regoff_t) < sizeof (ptrdiff_t)
+                || sizeof (regoff_t) < sizeof (ssize_t))
+              result |= 64;
+#endif
+
+            return result;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_re_compile_pattern_working=yes
+else $as_nop
+  gl_cv_func_re_compile_pattern_working=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_re_compile_pattern_working" >&5
+printf "%s\n" "$gl_cv_func_re_compile_pattern_working" >&6; }
+    case "$gl_cv_func_re_compile_pattern_working" in #(
+      *yes) ac_use_included_regex=no;; #(
+      *no) ac_use_included_regex=yes;;
+    esac
+    ;;
+  *) as_fn_error $? "Invalid value for --with-included-regex: $with_included_regex" "$LINENO" 5
+    ;;
+  esac
+
+  if test $ac_use_included_regex = yes; then
+
+printf "%s\n" "#define _REGEX_INCLUDE_LIMITS_H 1" >>confdefs.h
+
+
+printf "%s\n" "#define _REGEX_LARGE_OFFSETS 1" >>confdefs.h
+
+
+printf "%s\n" "#define re_syntax_options rpl_re_syntax_options" >>confdefs.h
+
+
+printf "%s\n" "#define re_set_syntax rpl_re_set_syntax" >>confdefs.h
+
+
+printf "%s\n" "#define re_compile_pattern rpl_re_compile_pattern" >>confdefs.h
+
+
+printf "%s\n" "#define re_compile_fastmap rpl_re_compile_fastmap" >>confdefs.h
+
+
+printf "%s\n" "#define re_search rpl_re_search" >>confdefs.h
+
+
+printf "%s\n" "#define re_search_2 rpl_re_search_2" >>confdefs.h
+
+
+printf "%s\n" "#define re_match rpl_re_match" >>confdefs.h
+
+
+printf "%s\n" "#define re_match_2 rpl_re_match_2" >>confdefs.h
+
+
+printf "%s\n" "#define re_set_registers rpl_re_set_registers" >>confdefs.h
+
+
+printf "%s\n" "#define re_comp rpl_re_comp" >>confdefs.h
+
+
+printf "%s\n" "#define re_exec rpl_re_exec" >>confdefs.h
+
+
+printf "%s\n" "#define regcomp rpl_regcomp" >>confdefs.h
+
+
+printf "%s\n" "#define regexec rpl_regexec" >>confdefs.h
+
+
+printf "%s\n" "#define regerror rpl_regerror" >>confdefs.h
+
+
+printf "%s\n" "#define regfree rpl_regfree" >>confdefs.h
+
+  fi
+
+  if test $ac_use_included_regex = yes; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS regex.$ac_objext"
+
+
+
+
+
+
+
+  ac_fn_c_check_header_compile "$LINENO" "libintl.h" "ac_cv_header_libintl_h" "$ac_includes_default"
+if test "x$ac_cv_header_libintl_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_LIBINTL_H 1" >>confdefs.h
+
+fi
+
+
+  ac_fn_check_decl "$LINENO" "isblank" "ac_cv_have_decl_isblank" "#include <ctype.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_isblank" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_ISBLANK $ac_have_decl" >>confdefs.h
+
+
+  fi
+
+
+
+
+
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether setlocale (LC_ALL, NULL) is multithread-safe" >&5
+printf %s "checking whether setlocale (LC_ALL, NULL) is multithread-safe... " >&6; }
+if test ${gl_cv_func_setlocale_null_all_mtsafe+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  case "$host_os" in
+       # Guess no on musl libc, macOS, FreeBSD, NetBSD, OpenBSD, AIX, Haiku, Cygwin.
+       *-musl* | darwin* | freebsd* | midnightbsd* | netbsd* | openbsd* | aix* | haiku* | cygwin*)
+         gl_cv_func_setlocale_null_all_mtsafe=no ;;
+       # Guess yes on glibc, HP-UX, IRIX, Solaris, native Windows.
+       *-gnu* | gnu* | hpux* | irix* | solaris* | mingw*)
+         gl_cv_func_setlocale_null_all_mtsafe=yes ;;
+       # If we don't know, obey --enable-cross-guesses.
+       *)
+         gl_cv_func_setlocale_null_all_mtsafe="$gl_cross_guess_normal" ;;
+     esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_setlocale_null_all_mtsafe" >&5
+printf "%s\n" "$gl_cv_func_setlocale_null_all_mtsafe" >&6; }
+    case "$host_os" in
+    mingw*) ;;
+    *)
+      if test $gl_pthread_api = no && test $ac_cv_header_threads_h = no; then
+        gl_cv_func_setlocale_null_all_mtsafe="trivially yes"
+      fi
+      ;;
+  esac
+  case "$gl_cv_func_setlocale_null_all_mtsafe" in
+    *yes) SETLOCALE_NULL_ALL_MTSAFE=1 ;;
+    *)    SETLOCALE_NULL_ALL_MTSAFE=0 ;;
+  esac
+
+printf "%s\n" "#define SETLOCALE_NULL_ALL_MTSAFE $SETLOCALE_NULL_ALL_MTSAFE" >>confdefs.h
+
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether setlocale (category, NULL) is multithread-safe" >&5
+printf %s "checking whether setlocale (category, NULL) is multithread-safe... " >&6; }
+if test ${gl_cv_func_setlocale_null_one_mtsafe+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  case "$host_os" in
+       # Guess no on OpenBSD, AIX.
+       openbsd* | aix*)
+         gl_cv_func_setlocale_null_one_mtsafe=no ;;
+       # Guess yes on glibc, musl libc, macOS, FreeBSD, NetBSD, HP-UX, IRIX, Solaris, Haiku, Cygwin, native Windows.
+       *-gnu* | gnu* | *-musl* | darwin* | freebsd* | midnightbsd* | netbsd* | hpux* | irix* | solaris* | haiku* | cygwin* | mingw*)
+         gl_cv_func_setlocale_null_one_mtsafe=yes ;;
+       # If we don't know, obey --enable-cross-guesses.
+       *)
+         gl_cv_func_setlocale_null_one_mtsafe="$gl_cross_guess_normal" ;;
+     esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_setlocale_null_one_mtsafe" >&5
+printf "%s\n" "$gl_cv_func_setlocale_null_one_mtsafe" >&6; }
+    case "$host_os" in
+    mingw*) ;;
+    *)
+      if test $gl_pthread_api = no && test $ac_cv_header_threads_h = no; then
+        gl_cv_func_setlocale_null_one_mtsafe="trivially yes"
+      fi
+      ;;
+  esac
+  case "$gl_cv_func_setlocale_null_one_mtsafe" in
+    *yes) SETLOCALE_NULL_ONE_MTSAFE=1 ;;
+    *)    SETLOCALE_NULL_ONE_MTSAFE=0 ;;
+  esac
+
+printf "%s\n" "#define SETLOCALE_NULL_ONE_MTSAFE $SETLOCALE_NULL_ONE_MTSAFE" >>confdefs.h
+
+
+    if test $SETLOCALE_NULL_ALL_MTSAFE = 0 || test $SETLOCALE_NULL_ONE_MTSAFE = 0; then
+    case "$host_os" in
+      mingw*) LIB_SETLOCALE_NULL= ;;
+      *)
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether imported symbols can be declared weak" >&5
+printf %s "checking whether imported symbols can be declared weak... " >&6; }
+if test ${gl_cv_have_weak+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_cv_have_weak=no
+          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+extern void xyzzy ();
+#pragma weak xyzzy
+int
+main (void)
+{
+xyzzy();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_have_weak=maybe
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+     if test $gl_cv_have_weak = maybe; then
+                     if test "$cross_compiling" = yes
+then :
+                      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef __ELF__
+             Extensible Linking Format
+             #endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Extensible Linking Format" >/dev/null 2>&1
+then :
+  gl_cv_have_weak="guessing yes"
+else $as_nop
+  gl_cv_have_weak="guessing no"
+fi
+rm -rf conftest*
+
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdio.h>
+#pragma weak fputs
+int main ()
+{
+  return (fputs == NULL);
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_have_weak=yes
+else $as_nop
+  gl_cv_have_weak=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+     fi
+          case " $LDFLAGS " in
+       *" -static "*) gl_cv_have_weak=no ;;
+     esac
+                    case "$gl_cv_have_weak" in
+       *yes)
+         case "$host_os" in
+           freebsd* | dragonfly* | midnightbsd*)
+             : > conftest1.c
+             $CC $CPPFLAGS $CFLAGS $LDFLAGS -fPIC -shared -o libempty.so conftest1.c -lpthread >&5 2>&1
+             cat <<EOF > conftest2.c
+#include <pthread.h>
+#pragma weak pthread_mutexattr_gettype
+int main ()
+{
+  return (pthread_mutexattr_gettype != NULL);
+}
+EOF
+             $CC $CPPFLAGS $CFLAGS $LDFLAGS -o conftest conftest2.c libempty.so >&5 2>&1 \
+               || gl_cv_have_weak=no
+             rm -f conftest1.c libempty.so conftest2.c conftest
+             ;;
+         esac
+         ;;
+     esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_have_weak" >&5
+printf "%s\n" "$gl_cv_have_weak" >&6; }
+  case "$gl_cv_have_weak" in
+    *yes)
+
+printf "%s\n" "#define HAVE_WEAK_SYMBOLS 1" >>confdefs.h
+
+      ;;
+  esac
+
+        case "$gl_cv_have_weak" in
+          *yes) LIB_SETLOCALE_NULL= ;;
+          *)    LIB_SETLOCALE_NULL="$LIBPTHREAD" ;;
+        esac
+        ;;
+    esac
+  else
+    LIB_SETLOCALE_NULL=
+  fi
+
+
+  if test $SETLOCALE_NULL_ALL_MTSAFE = 0 || test $SETLOCALE_NULL_ONE_MTSAFE = 0; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS setlocale-lock.$ac_objext"
+
+
+
+
+  CFLAG_VISIBILITY=
+  HAVE_VISIBILITY=0
+  if test -n "$GCC"; then
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the -Werror option is usable" >&5
+printf %s "checking whether the -Werror option is usable... " >&6; }
+if test ${gl_cv_cc_vis_werror+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -Werror"
+       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_cc_vis_werror=yes
+else $as_nop
+  gl_cv_cc_vis_werror=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+       CFLAGS="$gl_save_CFLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_cc_vis_werror" >&5
+printf "%s\n" "$gl_cv_cc_vis_werror" >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for simple visibility declarations" >&5
+printf %s "checking for simple visibility declarations... " >&6; }
+if test ${gl_cv_cc_visibility+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -fvisibility=hidden"
+                                          if test $gl_cv_cc_vis_werror = yes; then
+         CFLAGS="$CFLAGS -Werror"
+       fi
+       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+extern __attribute__((__visibility__("hidden"))) int hiddenvar;
+              extern __attribute__((__visibility__("default"))) int exportedvar;
+              extern __attribute__((__visibility__("hidden"))) int hiddenfunc (void);
+              extern __attribute__((__visibility__("default"))) int exportedfunc (void);
+              void dummyfunc (void);
+              int hiddenvar;
+              int exportedvar;
+              int hiddenfunc (void) { return 51; }
+              int exportedfunc (void) { return 1225736919; }
+              void dummyfunc (void) {}
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_cc_visibility=yes
+else $as_nop
+  gl_cv_cc_visibility=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+       CFLAGS="$gl_save_CFLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_cc_visibility" >&5
+printf "%s\n" "$gl_cv_cc_visibility" >&6; }
+    if test $gl_cv_cc_visibility = yes; then
+      CFLAG_VISIBILITY="-fvisibility=hidden"
+      HAVE_VISIBILITY=1
+    fi
+  fi
+
+
+
+printf "%s\n" "#define HAVE_VISIBILITY $HAVE_VISIBILITY" >>confdefs.h
+
+
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_SETLOCALE_NULL=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_SETLOCALE_NULL 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+# Check whether --with-libsigsegv was given.
+if test ${with_libsigsegv+y}
+then :
+  withval=$with_libsigsegv;
+fi
+
+  SIGSEGV_H=sigsegv.h
+  if test "$with_libsigsegv" = yes; then
+
+
+
+
+
+
+
+
+
+
+
+
+
+    use_additional=yes
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+
+    eval additional_includedir=\"$includedir\"
+    eval additional_libdir=\"$libdir\"
+    eval additional_libdir2=\"$exec_prefix/$acl_libdirstem2\"
+    eval additional_libdir3=\"$exec_prefix/$acl_libdirstem3\"
+
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+
+# Check whether --with-libsigsegv-prefix was given.
+if test ${with_libsigsegv_prefix+y}
+then :
+  withval=$with_libsigsegv_prefix;
+    if test "X$withval" = "Xno"; then
+      use_additional=no
+    else
+      if test "X$withval" = "X"; then
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+
+          eval additional_includedir=\"$includedir\"
+          eval additional_libdir=\"$libdir\"
+          eval additional_libdir2=\"$exec_prefix/$acl_libdirstem2\"
+          eval additional_libdir3=\"$exec_prefix/$acl_libdirstem3\"
+
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+      else
+        additional_includedir="$withval/include"
+        additional_libdir="$withval/$acl_libdirstem"
+        additional_libdir2="$withval/$acl_libdirstem2"
+        additional_libdir3="$withval/$acl_libdirstem3"
+      fi
+    fi
+
+fi
+
+  if test "X$additional_libdir2" = "X$additional_libdir"; then
+    additional_libdir2=
+  fi
+  if test "X$additional_libdir3" = "X$additional_libdir"; then
+    additional_libdir3=
+  fi
+      LIBSIGSEGV=
+  LTLIBSIGSEGV=
+  INCSIGSEGV=
+  LIBSIGSEGV_PREFIX=
+      HAVE_LIBSIGSEGV=
+  rpathdirs=
+  ltrpathdirs=
+  names_already_handled=
+  names_next_round='sigsegv '
+  while test -n "$names_next_round"; do
+    names_this_round="$names_next_round"
+    names_next_round=
+    for name in $names_this_round; do
+      already_handled=
+      for n in $names_already_handled; do
+        if test "$n" = "$name"; then
+          already_handled=yes
+          break
+        fi
+      done
+      if test -z "$already_handled"; then
+        names_already_handled="$names_already_handled $name"
+                        uppername=`echo "$name" | sed -e 'y|abcdefghijklmnopqrstuvwxyz./+-|ABCDEFGHIJKLMNOPQRSTUVWXYZ____|'`
+        eval value=\"\$HAVE_LIB$uppername\"
+        if test -n "$value"; then
+          if test "$value" = yes; then
+            eval value=\"\$LIB$uppername\"
+            test -z "$value" || LIBSIGSEGV="${LIBSIGSEGV}${LIBSIGSEGV:+ }$value"
+            eval value=\"\$LTLIB$uppername\"
+            test -z "$value" || LTLIBSIGSEGV="${LTLIBSIGSEGV}${LTLIBSIGSEGV:+ }$value"
+          else
+                                    :
+          fi
+        else
+                              found_dir=
+          found_la=
+          found_so=
+          found_a=
+          eval libname=\"$acl_libname_spec\"    # typically: libname=lib$name
+          if test -n "$acl_shlibext"; then
+            shrext=".$acl_shlibext"             # typically: shrext=.so
+          else
+            shrext=
+          fi
+          if test $use_additional = yes; then
+            for additional_libdir_variable in additional_libdir additional_libdir2 additional_libdir3; do
+              if test "X$found_dir" = "X"; then
+                eval dir=\$$additional_libdir_variable
+                if test -n "$dir"; then
+                                                      if test -n "$acl_shlibext"; then
+                    if test -f "$dir/$libname$shrext" && acl_is_expected_elfclass < "$dir/$libname$shrext"; then
+                      found_dir="$dir"
+                      found_so="$dir/$libname$shrext"
+                    else
+                      if test "$acl_library_names_spec" = '$libname$shrext$versuffix'; then
+                        ver=`(cd "$dir" && \
+                              for f in "$libname$shrext".*; do echo "$f"; done \
+                              | sed -e "s,^$libname$shrext\\\\.,," \
+                              | sort -t '.' -n -r -k1,1 -k2,2 -k3,3 -k4,4 -k5,5 \
+                              | sed 1q ) 2>/dev/null`
+                        if test -n "$ver" && test -f "$dir/$libname$shrext.$ver" && acl_is_expected_elfclass < "$dir/$libname$shrext.$ver"; then
+                          found_dir="$dir"
+                          found_so="$dir/$libname$shrext.$ver"
+                        fi
+                      else
+                        eval library_names=\"$acl_library_names_spec\"
+                        for f in $library_names; do
+                          if test -f "$dir/$f" && acl_is_expected_elfclass < "$dir/$f"; then
+                            found_dir="$dir"
+                            found_so="$dir/$f"
+                            break
+                          fi
+                        done
+                      fi
+                    fi
+                  fi
+                                    if test "X$found_dir" = "X"; then
+                    if test -f "$dir/$libname.$acl_libext" && ${AR-ar} -p "$dir/$libname.$acl_libext" | acl_is_expected_elfclass; then
+                      found_dir="$dir"
+                      found_a="$dir/$libname.$acl_libext"
+                    fi
+                  fi
+                  if test "X$found_dir" != "X"; then
+                    if test -f "$dir/$libname.la"; then
+                      found_la="$dir/$libname.la"
+                    fi
+                  fi
+                fi
+              fi
+            done
+          fi
+          if test "X$found_dir" = "X"; then
+            for x in $LDFLAGS $LTLIBSIGSEGV; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+              case "$x" in
+                -L*)
+                  dir=`echo "X$x" | sed -e 's/^X-L//'`
+                                    if test -n "$acl_shlibext"; then
+                    if test -f "$dir/$libname$shrext" && acl_is_expected_elfclass < "$dir/$libname$shrext"; then
+                      found_dir="$dir"
+                      found_so="$dir/$libname$shrext"
+                    else
+                      if test "$acl_library_names_spec" = '$libname$shrext$versuffix'; then
+                        ver=`(cd "$dir" && \
+                              for f in "$libname$shrext".*; do echo "$f"; done \
+                              | sed -e "s,^$libname$shrext\\\\.,," \
+                              | sort -t '.' -n -r -k1,1 -k2,2 -k3,3 -k4,4 -k5,5 \
+                              | sed 1q ) 2>/dev/null`
+                        if test -n "$ver" && test -f "$dir/$libname$shrext.$ver" && acl_is_expected_elfclass < "$dir/$libname$shrext.$ver"; then
+                          found_dir="$dir"
+                          found_so="$dir/$libname$shrext.$ver"
+                        fi
+                      else
+                        eval library_names=\"$acl_library_names_spec\"
+                        for f in $library_names; do
+                          if test -f "$dir/$f" && acl_is_expected_elfclass < "$dir/$f"; then
+                            found_dir="$dir"
+                            found_so="$dir/$f"
+                            break
+                          fi
+                        done
+                      fi
+                    fi
+                  fi
+                                    if test "X$found_dir" = "X"; then
+                    if test -f "$dir/$libname.$acl_libext" && ${AR-ar} -p "$dir/$libname.$acl_libext" | acl_is_expected_elfclass; then
+                      found_dir="$dir"
+                      found_a="$dir/$libname.$acl_libext"
+                    fi
+                  fi
+                  if test "X$found_dir" != "X"; then
+                    if test -f "$dir/$libname.la"; then
+                      found_la="$dir/$libname.la"
+                    fi
+                  fi
+                  ;;
+              esac
+              if test "X$found_dir" != "X"; then
+                break
+              fi
+            done
+          fi
+          if test "X$found_dir" != "X"; then
+                        LTLIBSIGSEGV="${LTLIBSIGSEGV}${LTLIBSIGSEGV:+ }-L$found_dir -l$name"
+            if test "X$found_so" != "X"; then
+                                                        if test "$enable_rpath" = no \
+                 || test "X$found_dir" = "X/usr/$acl_libdirstem" \
+                 || test "X$found_dir" = "X/usr/$acl_libdirstem2" \
+                 || test "X$found_dir" = "X/usr/$acl_libdirstem3"; then
+                                LIBSIGSEGV="${LIBSIGSEGV}${LIBSIGSEGV:+ }$found_so"
+              else
+                                                                                haveit=
+                for x in $ltrpathdirs; do
+                  if test "X$x" = "X$found_dir"; then
+                    haveit=yes
+                    break
+                  fi
+                done
+                if test -z "$haveit"; then
+                  ltrpathdirs="$ltrpathdirs $found_dir"
+                fi
+                                if test "$acl_hardcode_direct" = yes; then
+                                                      LIBSIGSEGV="${LIBSIGSEGV}${LIBSIGSEGV:+ }$found_so"
+                else
+                  if test -n "$acl_hardcode_libdir_flag_spec" && test "$acl_hardcode_minus_L" = no; then
+                                                            LIBSIGSEGV="${LIBSIGSEGV}${LIBSIGSEGV:+ }$found_so"
+                                                            haveit=
+                    for x in $rpathdirs; do
+                      if test "X$x" = "X$found_dir"; then
+                        haveit=yes
+                        break
+                      fi
+                    done
+                    if test -z "$haveit"; then
+                      rpathdirs="$rpathdirs $found_dir"
+                    fi
+                  else
+                                                                                haveit=
+                    for x in $LDFLAGS $LIBSIGSEGV; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+                      if test "X$x" = "X-L$found_dir"; then
+                        haveit=yes
+                        break
+                      fi
+                    done
+                    if test -z "$haveit"; then
+                      LIBSIGSEGV="${LIBSIGSEGV}${LIBSIGSEGV:+ }-L$found_dir"
+                    fi
+                    if test "$acl_hardcode_minus_L" != no; then
+                                                                                        LIBSIGSEGV="${LIBSIGSEGV}${LIBSIGSEGV:+ }$found_so"
+                    else
+                                                                                                                                                                                LIBSIGSEGV="${LIBSIGSEGV}${LIBSIGSEGV:+ }-l$name"
+                    fi
+                  fi
+                fi
+              fi
+            else
+              if test "X$found_a" != "X"; then
+                                LIBSIGSEGV="${LIBSIGSEGV}${LIBSIGSEGV:+ }$found_a"
+              else
+                                                LIBSIGSEGV="${LIBSIGSEGV}${LIBSIGSEGV:+ }-L$found_dir -l$name"
+              fi
+            fi
+                        additional_includedir=
+            case "$found_dir" in
+              */$acl_libdirstem | */$acl_libdirstem/)
+                basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem/"'*$,,'`
+                if test "$name" = 'sigsegv'; then
+                  LIBSIGSEGV_PREFIX="$basedir"
+                fi
+                additional_includedir="$basedir/include"
+                ;;
+              */$acl_libdirstem2 | */$acl_libdirstem2/)
+                basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem2/"'*$,,'`
+                if test "$name" = 'sigsegv'; then
+                  LIBSIGSEGV_PREFIX="$basedir"
+                fi
+                additional_includedir="$basedir/include"
+                ;;
+              */$acl_libdirstem3 | */$acl_libdirstem3/)
+                basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem3/"'*$,,'`
+                if test "$name" = 'sigsegv'; then
+                  LIBSIGSEGV_PREFIX="$basedir"
+                fi
+                additional_includedir="$basedir/include"
+                ;;
+            esac
+            if test "X$additional_includedir" != "X"; then
+                                                                                                                if test "X$additional_includedir" != "X/usr/include"; then
+                haveit=
+                if test "X$additional_includedir" = "X/usr/local/include"; then
+                  if test -n "$GCC"; then
+                    case $host_os in
+                      linux* | gnu* | k*bsd*-gnu) haveit=yes;;
+                    esac
+                  fi
+                fi
+                if test -z "$haveit"; then
+                  for x in $CPPFLAGS $INCSIGSEGV; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+                    if test "X$x" = "X-I$additional_includedir"; then
+                      haveit=yes
+                      break
+                    fi
+                  done
+                  if test -z "$haveit"; then
+                    if test -d "$additional_includedir"; then
+                                            INCSIGSEGV="${INCSIGSEGV}${INCSIGSEGV:+ }-I$additional_includedir"
+                    fi
+                  fi
+                fi
+              fi
+            fi
+                        if test -n "$found_la"; then
+                                                        save_libdir="$libdir"
+              case "$found_la" in
+                */* | *\\*) . "$found_la" ;;
+                *) . "./$found_la" ;;
+              esac
+              libdir="$save_libdir"
+                            for dep in $dependency_libs; do
+                case "$dep" in
+                  -L*)
+                    dependency_libdir=`echo "X$dep" | sed -e 's/^X-L//'`
+                                                                                                                                                                if test "X$dependency_libdir" != "X/usr/$acl_libdirstem" \
+                       && test "X$dependency_libdir" != "X/usr/$acl_libdirstem2" \
+                       && test "X$dependency_libdir" != "X/usr/$acl_libdirstem3"; then
+                      haveit=
+                      if test "X$dependency_libdir" = "X/usr/local/$acl_libdirstem" \
+                         || test "X$dependency_libdir" = "X/usr/local/$acl_libdirstem2" \
+                         || test "X$dependency_libdir" = "X/usr/local/$acl_libdirstem3"; then
+                        if test -n "$GCC"; then
+                          case $host_os in
+                            linux* | gnu* | k*bsd*-gnu) haveit=yes;;
+                          esac
+                        fi
+                      fi
+                      if test -z "$haveit"; then
+                        haveit=
+                        for x in $LDFLAGS $LIBSIGSEGV; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+                          if test "X$x" = "X-L$dependency_libdir"; then
+                            haveit=yes
+                            break
+                          fi
+                        done
+                        if test -z "$haveit"; then
+                          if test -d "$dependency_libdir"; then
+                                                        LIBSIGSEGV="${LIBSIGSEGV}${LIBSIGSEGV:+ }-L$dependency_libdir"
+                          fi
+                        fi
+                        haveit=
+                        for x in $LDFLAGS $LTLIBSIGSEGV; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+                          if test "X$x" = "X-L$dependency_libdir"; then
+                            haveit=yes
+                            break
+                          fi
+                        done
+                        if test -z "$haveit"; then
+                          if test -d "$dependency_libdir"; then
+                                                        LTLIBSIGSEGV="${LTLIBSIGSEGV}${LTLIBSIGSEGV:+ }-L$dependency_libdir"
+                          fi
+                        fi
+                      fi
+                    fi
+                    ;;
+                  -R*)
+                    dir=`echo "X$dep" | sed -e 's/^X-R//'`
+                    if test "$enable_rpath" != no; then
+                                                                  haveit=
+                      for x in $rpathdirs; do
+                        if test "X$x" = "X$dir"; then
+                          haveit=yes
+                          break
+                        fi
+                      done
+                      if test -z "$haveit"; then
+                        rpathdirs="$rpathdirs $dir"
+                      fi
+                                                                  haveit=
+                      for x in $ltrpathdirs; do
+                        if test "X$x" = "X$dir"; then
+                          haveit=yes
+                          break
+                        fi
+                      done
+                      if test -z "$haveit"; then
+                        ltrpathdirs="$ltrpathdirs $dir"
+                      fi
+                    fi
+                    ;;
+                  -l*)
+                                                                                                                                                                dep=`echo "X$dep" | sed -e 's/^X-l//'`
+                    if test "X$dep" != Xc \
+                       || case $host_os in
+                            linux* | gnu* | k*bsd*-gnu) false ;;
+                            *)                          true ;;
+                          esac; then
+                      names_next_round="$names_next_round $dep"
+                    fi
+                    ;;
+                  *.la)
+                                                                                names_next_round="$names_next_round "`echo "X$dep" | sed -e 's,^X.*/,,' -e 's,^lib,,' -e 's,\.la$,,'`
+                    ;;
+                  *)
+                                        LIBSIGSEGV="${LIBSIGSEGV}${LIBSIGSEGV:+ }$dep"
+                    LTLIBSIGSEGV="${LTLIBSIGSEGV}${LTLIBSIGSEGV:+ }$dep"
+                    ;;
+                esac
+              done
+            fi
+          else
+                                                            LIBSIGSEGV="${LIBSIGSEGV}${LIBSIGSEGV:+ }-l$name"
+            LTLIBSIGSEGV="${LTLIBSIGSEGV}${LTLIBSIGSEGV:+ }-l$name"
+          fi
+        fi
+      fi
+    done
+  done
+  if test "X$rpathdirs" != "X"; then
+    if test -n "$acl_hardcode_libdir_separator"; then
+                        alldirs=
+      for found_dir in $rpathdirs; do
+        alldirs="${alldirs}${alldirs:+$acl_hardcode_libdir_separator}$found_dir"
+      done
+            acl_save_libdir="$libdir"
+      libdir="$alldirs"
+      eval flag=\"$acl_hardcode_libdir_flag_spec\"
+      libdir="$acl_save_libdir"
+      LIBSIGSEGV="${LIBSIGSEGV}${LIBSIGSEGV:+ }$flag"
+    else
+            for found_dir in $rpathdirs; do
+        acl_save_libdir="$libdir"
+        libdir="$found_dir"
+        eval flag=\"$acl_hardcode_libdir_flag_spec\"
+        libdir="$acl_save_libdir"
+        LIBSIGSEGV="${LIBSIGSEGV}${LIBSIGSEGV:+ }$flag"
+      done
+    fi
+  fi
+  if test "X$ltrpathdirs" != "X"; then
+            for found_dir in $ltrpathdirs; do
+      LTLIBSIGSEGV="${LTLIBSIGSEGV}${LTLIBSIGSEGV:+ }-R$found_dir"
+    done
+  fi
+
+
+
+
+
+
+        ac_save_CPPFLAGS="$CPPFLAGS"
+
+  for element in $INCSIGSEGV; do
+    haveit=
+    for x in $CPPFLAGS; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+      if test "X$x" = "X$element"; then
+        haveit=yes
+        break
+      fi
+    done
+    if test -z "$haveit"; then
+      CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }$element"
+    fi
+  done
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for libsigsegv" >&5
+printf %s "checking for libsigsegv... " >&6; }
+if test ${ac_cv_libsigsegv+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    ac_save_LIBS="$LIBS"
+                                case " $LIBSIGSEGV" in
+      *" -l"*) LIBS="$LIBS $LIBSIGSEGV" ;;
+      *)       LIBS="$LIBSIGSEGV $LIBS" ;;
+    esac
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sigsegv.h>
+int
+main (void)
+{
+sigsegv_deinstall_handler();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_libsigsegv=yes
+else $as_nop
+  ac_cv_libsigsegv='no, consider installing GNU libsigsegv'
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+    LIBS="$ac_save_LIBS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_libsigsegv" >&5
+printf "%s\n" "$ac_cv_libsigsegv" >&6; }
+  if test "$ac_cv_libsigsegv" = yes; then
+    HAVE_LIBSIGSEGV=yes
+
+printf "%s\n" "#define HAVE_LIBSIGSEGV 1" >>confdefs.h
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to link with libsigsegv" >&5
+printf %s "checking how to link with libsigsegv... " >&6; }
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LIBSIGSEGV" >&5
+printf "%s\n" "$LIBSIGSEGV" >&6; }
+  else
+    HAVE_LIBSIGSEGV=no
+            CPPFLAGS="$ac_save_CPPFLAGS"
+    LIBSIGSEGV=
+    LTLIBSIGSEGV=
+    LIBSIGSEGV_PREFIX=
+  fi
+
+
+
+
+
+
+
+    gl_cv_lib_sigsegv="$ac_cv_libsigsegv"
+
+    if test "$gl_cv_lib_sigsegv" = yes; then
+      SIGSEGV_H=
+    fi
+  fi
+
+   if test -n "$SIGSEGV_H"; then
+  GL_GENERATE_SIGSEGV_H_TRUE=
+  GL_GENERATE_SIGSEGV_H_FALSE='#'
+else
+  GL_GENERATE_SIGSEGV_H_TRUE='#'
+  GL_GENERATE_SIGSEGV_H_FALSE=
+fi
+
+  if test -n "$SIGSEGV_H"; then
+
+
+    case "$host_os" in
+      solaris2.11)
+
+printf "%s\n" "#define SOLARIS11 1" >>confdefs.h
+
+        ;;
+    esac
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for stack direction" >&5
+printf %s "checking for stack direction... " >&6; }
+if test ${sv_cv_stack_direction_msg+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    case "$host_cpu" in
+            a29k | \
+      aarch64* | \
+      alpha* | \
+      arc | \
+      arm* | strongarm* | xscale* | \
+      avr | avr32 | \
+      bfin | \
+      c1 | c2 | c32 | c34 | c38 | \
+      clipper | \
+      cris | \
+      d30v | \
+      elxsi | \
+      fr30 | \
+      h8300 | \
+      i?86 | x86_64 | \
+      i860 | \
+      ia64 | \
+      m32r | \
+      m68* | \
+      m88k | \
+      mcore | \
+      microblaze | \
+      mips* | \
+      mmix | \
+      mn10200 | \
+      mn10300 | \
+      nios2 | \
+      nds32* | \
+      ns32k | \
+      pdp11 | \
+      pj* | \
+      powerpc* | rs6000 | \
+      riscv* | \
+      romp | \
+      s390* | \
+      sh* | \
+      sparc* | \
+      v850 | \
+      vax | \
+      xtensa)
+        sv_cv_stack_direction=-1 ;;
+      c4x | \
+      dsp16xx | \
+      i960 | \
+      hppa* | parisc* | \
+      stormy16 | \
+      we32k)
+        sv_cv_stack_direction=1 ;;
+      *)
+        if test $cross_compiling = no; then
+          cat > conftest.c <<EOF
+#include <stdio.h>
+int
+find_stack_direction (int *addr, int depth)
+{
+  int dir, dummy = 0;
+  if (! addr)
+    addr = &dummy;
+  *addr = addr < &dummy ? 1 : addr == &dummy ? 0 : -1;
+  dir = depth ? find_stack_direction (addr, depth - 1) : 0;
+  return dir + dummy;
+}
+int
+main (int argc, char *argv)
+{
+  printf ("%d\n", find_stack_direction (NULL, argc + 20));
+  return 0;
+}
+EOF
+          { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+          sv_cv_stack_direction=`./conftest`
+        else
+          sv_cv_stack_direction=0
+        fi
+        ;;
+    esac
+    case $sv_cv_stack_direction in
+      1)  sv_cv_stack_direction_msg="grows up";;
+      -1) sv_cv_stack_direction_msg="grows down";;
+      *)  sv_cv_stack_direction_msg="unknown";;
+    esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $sv_cv_stack_direction_msg" >&5
+printf "%s\n" "$sv_cv_stack_direction_msg" >&6; }
+
+printf "%s\n" "#define STACK_DIRECTION $sv_cv_stack_direction" >>confdefs.h
+
+
+
+
+
+
+
+
+  if test "$ac_cv_func_sigaltstack" = yes; then
+    ac_fn_c_check_type "$LINENO" "stack_t" "ac_cv_type_stack_t" "
+#include <signal.h>
+#if HAVE_SYS_SIGNAL_H
+# include <sys/signal.h>
+#endif
+
+"
+if test "x$ac_cv_type_stack_t" = xyes
+then :
+
+else $as_nop
+
+printf "%s\n" "#define stack_t struct sigaltstack" >>confdefs.h
+
+
+fi
+
+  fi
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working sigaltstack" >&5
+printf %s "checking for working sigaltstack... " >&6; }
+if test ${sv_cv_sigaltstack+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    if test "$ac_cv_func_sigaltstack" = yes; then
+      case "$host_os" in
+        macos* | darwin[6-9]* | darwin[1-9][0-9]*)
+          # On MacOS X 10.2 or newer, just assume that if it compiles, it will
+          # work. If we were to perform the real test, 1 Crash Report dialog
+          # window would pop up.
+          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+            #include <signal.h>
+int
+main (void)
+{
+int x = SA_ONSTACK; stack_t ss; sigaltstack ((stack_t*)0, &ss);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  sv_cv_sigaltstack="guessing yes"
+else $as_nop
+  sv_cv_sigaltstack=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+          ;;
+        *)
+          if test "$cross_compiling" = yes
+then :
+
+                            case "$host_os" in
+                *)
+                  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+                    #include <signal.h>
+int
+main (void)
+{
+int x = SA_ONSTACK; stack_t ss; sigaltstack ((stack_t*)0, &ss);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  sv_cv_sigaltstack="guessing yes"
+else $as_nop
+  sv_cv_sigaltstack=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+                  ;;
+              esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+
+#include <stdlib.h>
+#include <signal.h>
+#if HAVE_SYS_SIGNAL_H
+# include <sys/signal.h>
+#endif
+#if HAVE_SETRLIMIT
+# include <sys/types.h>
+# include <sys/time.h>
+# include <sys/resource.h>
+#endif
+void stackoverflow_handler (int sig)
+{
+  /* If we get here, the stack overflow was caught.  */
+  exit (0);
+}
+volatile int * recurse_1 (volatile int n, volatile int *p)
+{
+  if (n >= 0)
+    *recurse_1 (n + 1, p) += n;
+  return p;
+}
+int recurse (volatile int n)
+{
+  int sum = 0;
+  return *recurse_1 (n, &sum);
+}
+char mystack[2 * (1 << 24)];
+int main ()
+{
+  stack_t altstack;
+  struct sigaction action;
+#if defined HAVE_SETRLIMIT && defined RLIMIT_STACK
+  /* Before starting the endless recursion, try to be friendly to the user's
+     machine.  On some Linux 2.2.x systems, there is no stack limit for user
+     processes at all.  We don't want to kill such systems.  */
+  struct rlimit rl;
+  rl.rlim_cur = rl.rlim_max = 0x100000; /* 1 MB */
+  setrlimit (RLIMIT_STACK, &rl);
+#endif
+  /* Install the alternate stack.  Use the midpoint of mystack, to guard
+     against a buggy interpretation of ss_sp on IRIX.  */
+#ifdef SIGSTKSZ
+  if (sizeof mystack / 2 < SIGSTKSZ)
+    exit (3);
+#endif
+  altstack.ss_sp = mystack + sizeof mystack / 2;
+  altstack.ss_size = sizeof mystack / 2;
+  altstack.ss_flags = 0; /* no SS_DISABLE */
+  if (sigaltstack (&altstack, NULL) < 0)
+    exit (1);
+  /* Install the SIGSEGV handler.  */
+  sigemptyset (&action.sa_mask);
+  action.sa_handler = &stackoverflow_handler;
+  action.sa_flags = SA_ONSTACK;
+  sigaction (SIGSEGV, &action, (struct sigaction *) NULL);
+  sigaction (SIGBUS, &action, (struct sigaction *) NULL);
+  /* Provoke a stack overflow.  */
+  recurse (0);
+  exit (2);
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  sv_cv_sigaltstack=yes
+else $as_nop
+  sv_cv_sigaltstack=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+          ;;
+      esac
+    else
+      sv_cv_sigaltstack=no
+    fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $sv_cv_sigaltstack" >&5
+printf "%s\n" "$sv_cv_sigaltstack" >&6; }
+  if test "$sv_cv_sigaltstack" != no; then
+
+printf "%s\n" "#define HAVE_WORKING_SIGALTSTACK 1" >>confdefs.h
+
+
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for correct stack_t interpretation" >&5
+printf %s "checking for correct stack_t interpretation... " >&6; }
+if test ${sv_cv_sigaltstack_low_base+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      if test "$cross_compiling" = yes
+then :
+
+                case "$host_os" in
+          irix5*) sv_cv_sigaltstack_low_base="no" ;;
+          *)      sv_cv_sigaltstack_low_base="guessing yes" ;;
+        esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+
+#include <stdlib.h>
+#include <signal.h>
+#if HAVE_SYS_SIGNAL_H
+# include <sys/signal.h>
+#endif
+volatile char *stack_lower_bound;
+volatile char *stack_upper_bound;
+static void check_stack_location (volatile char *addr)
+{
+  if (addr >= stack_lower_bound && addr <= stack_upper_bound)
+    exit (0);
+  else
+    exit (1);
+}
+static void stackoverflow_handler (int sig)
+{
+  char dummy;
+  check_stack_location (&dummy);
+}
+char mystack[2 * (1 << 24)];
+int main ()
+{
+  stack_t altstack;
+  struct sigaction action;
+  /* Install the alternate stack.  */
+  altstack.ss_sp = mystack + sizeof mystack / 2;
+  altstack.ss_size = sizeof mystack / 2;
+  stack_lower_bound = (char *) altstack.ss_sp;
+  stack_upper_bound = (char *) altstack.ss_sp + altstack.ss_size - 1;
+  altstack.ss_flags = 0; /* no SS_DISABLE */
+  if (sigaltstack (&altstack, NULL) < 0)
+    exit (2);
+  /* Install the SIGSEGV handler.  */
+  sigemptyset (&action.sa_mask);
+  action.sa_handler = &stackoverflow_handler;
+  action.sa_flags = SA_ONSTACK;
+  if (sigaction (SIGSEGV, &action, (struct sigaction *) NULL) < 0)
+    exit(3);
+  /* Provoke a SIGSEGV.  */
+  raise (SIGSEGV);
+  exit (3);
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  sv_cv_sigaltstack_low_base=yes
+else $as_nop
+  sv_cv_sigaltstack_low_base=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $sv_cv_sigaltstack_low_base" >&5
+printf "%s\n" "$sv_cv_sigaltstack_low_base" >&6; }
+    if test "$sv_cv_sigaltstack_low_base" = no; then
+
+printf "%s\n" "#define SIGALTSTACK_SS_REVERSED 1" >>confdefs.h
+
+    fi
+  fi
+
+
+  fi
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ssize_t" >&5
+printf %s "checking for ssize_t... " >&6; }
+if test ${gt_cv_ssize_t+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+int
+main (void)
+{
+int x = sizeof (ssize_t *) + sizeof (ssize_t);
+            return !x;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gt_cv_ssize_t=yes
+else $as_nop
+  gt_cv_ssize_t=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_ssize_t" >&5
+printf "%s\n" "$gt_cv_ssize_t" >&6; }
+  if test $gt_cv_ssize_t = no; then
+
+printf "%s\n" "#define ssize_t int" >>confdefs.h
+
+  fi
+
+
+
+
+
+  case "$host_os" in
+    mingw*)
+                  REPLACE_STAT=1
+      ;;
+    *)
+                        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether stat handles trailing slashes on files" >&5
+printf %s "checking whether stat handles trailing slashes on files... " >&6; }
+if test ${gl_cv_func_stat_file_slash+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  touch conftest.tmp
+         # Assume that if we have lstat, we can also check symlinks.
+         if test $ac_cv_func_lstat = yes; then
+           ln -s conftest.tmp conftest.lnk
+         fi
+         if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                               # Guess yes on Linux systems.
+              linux-* | linux) gl_cv_func_stat_file_slash="guessing yes" ;;
+                               # Guess yes on glibc systems.
+              *-gnu* | gnu*)   gl_cv_func_stat_file_slash="guessing yes" ;;
+                               # If we don't know, obey --enable-cross-guesses.
+              *)               gl_cv_func_stat_file_slash="$gl_cross_guess_normal" ;;
+            esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/stat.h>
+
+int
+main (void)
+{
+int result = 0;
+               struct stat st;
+               if (!stat ("conftest.tmp/", &st))
+                 result |= 1;
+#if HAVE_LSTAT
+               if (!stat ("conftest.lnk/", &st))
+                 result |= 2;
+#endif
+               return result;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_stat_file_slash=yes
+else $as_nop
+  gl_cv_func_stat_file_slash=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+         rm -f conftest.tmp conftest.lnk
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_stat_file_slash" >&5
+printf "%s\n" "$gl_cv_func_stat_file_slash" >&6; }
+      case $gl_cv_func_stat_file_slash in
+        *no)
+          REPLACE_STAT=1
+
+printf "%s\n" "#define REPLACE_FUNC_STAT_FILE 1" >>confdefs.h
+;;
+      esac
+      case $host_os in
+                solaris*)
+          REPLACE_FSTAT=1 ;;
+      esac
+      ;;
+  esac
+
+  if test $REPLACE_STAT = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS stat.$ac_objext"
+
+    case "$host_os" in
+      mingw*)
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS stat-w32.$ac_objext"
+
+        ;;
+    esac
+
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_STAT=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_STAT 1" >>confdefs.h
+
+
+
+
+
+
+
+  ac_fn_c_check_member "$LINENO" "struct stat" "st_atim.tv_nsec" "ac_cv_member_struct_stat_st_atim_tv_nsec" "#include <sys/types.h>
+     #include <sys/stat.h>
+"
+if test "x$ac_cv_member_struct_stat_st_atim_tv_nsec" = xyes
+then :
+
+printf "%s\n" "#define HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC 1" >>confdefs.h
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether struct stat.st_atim is of type struct timespec" >&5
+printf %s "checking whether struct stat.st_atim is of type struct timespec... " >&6; }
+if test ${ac_cv_typeof_struct_stat_st_atim_is_struct_timespec+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+            #include <sys/types.h>
+            #include <sys/stat.h>
+            #if HAVE_SYS_TIME_H
+            # include <sys/time.h>
+            #endif
+            #include <time.h>
+            struct timespec ts;
+            struct stat st;
+
+int
+main (void)
+{
+
+            st.st_atim = ts;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_typeof_struct_stat_st_atim_is_struct_timespec=yes
+else $as_nop
+  ac_cv_typeof_struct_stat_st_atim_is_struct_timespec=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_typeof_struct_stat_st_atim_is_struct_timespec" >&5
+printf "%s\n" "$ac_cv_typeof_struct_stat_st_atim_is_struct_timespec" >&6; }
+     if test $ac_cv_typeof_struct_stat_st_atim_is_struct_timespec = yes; then
+
+printf "%s\n" "#define TYPEOF_STRUCT_STAT_ST_ATIM_IS_STRUCT_TIMESPEC 1" >>confdefs.h
+
+     fi
+else $as_nop
+  ac_fn_c_check_member "$LINENO" "struct stat" "st_atimespec.tv_nsec" "ac_cv_member_struct_stat_st_atimespec_tv_nsec" "#include <sys/types.h>
+        #include <sys/stat.h>
+"
+if test "x$ac_cv_member_struct_stat_st_atimespec_tv_nsec" = xyes
+then :
+
+printf "%s\n" "#define HAVE_STRUCT_STAT_ST_ATIMESPEC_TV_NSEC 1" >>confdefs.h
+
+
+else $as_nop
+  ac_fn_c_check_member "$LINENO" "struct stat" "st_atimensec" "ac_cv_member_struct_stat_st_atimensec" "#include <sys/types.h>
+           #include <sys/stat.h>
+"
+if test "x$ac_cv_member_struct_stat_st_atimensec" = xyes
+then :
+
+printf "%s\n" "#define HAVE_STRUCT_STAT_ST_ATIMENSEC 1" >>confdefs.h
+
+
+else $as_nop
+  ac_fn_c_check_member "$LINENO" "struct stat" "st_atim.st__tim.tv_nsec" "ac_cv_member_struct_stat_st_atim_st__tim_tv_nsec" "#include <sys/types.h>
+              #include <sys/stat.h>
+"
+if test "x$ac_cv_member_struct_stat_st_atim_st__tim_tv_nsec" = xyes
+then :
+
+printf "%s\n" "#define HAVE_STRUCT_STAT_ST_ATIM_ST__TIM_TV_NSEC 1" >>confdefs.h
+
+
+fi
+
+fi
+
+fi
+
+fi
+
+
+
+
+
+  ac_fn_c_check_member "$LINENO" "struct stat" "st_birthtimespec.tv_nsec" "ac_cv_member_struct_stat_st_birthtimespec_tv_nsec" "#include <sys/types.h>
+     #include <sys/stat.h>
+"
+if test "x$ac_cv_member_struct_stat_st_birthtimespec_tv_nsec" = xyes
+then :
+
+printf "%s\n" "#define HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC 1" >>confdefs.h
+
+
+else $as_nop
+  ac_fn_c_check_member "$LINENO" "struct stat" "st_birthtimensec" "ac_cv_member_struct_stat_st_birthtimensec" "#include <sys/types.h>
+        #include <sys/stat.h>
+"
+if test "x$ac_cv_member_struct_stat_st_birthtimensec" = xyes
+then :
+
+printf "%s\n" "#define HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC 1" >>confdefs.h
+
+
+else $as_nop
+  ac_fn_c_check_member "$LINENO" "struct stat" "st_birthtim.tv_nsec" "ac_cv_member_struct_stat_st_birthtim_tv_nsec" "#include <sys/types.h>
+          #include <sys/stat.h>
+"
+if test "x$ac_cv_member_struct_stat_st_birthtim_tv_nsec" = xyes
+then :
+
+printf "%s\n" "#define HAVE_STRUCT_STAT_ST_BIRTHTIM_TV_NSEC 1" >>confdefs.h
+
+
+fi
+
+fi
+
+fi
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working stdalign.h" >&5
+printf %s "checking for working stdalign.h... " >&6; }
+if test ${gl_cv_header_working_stdalign_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdint.h>
+            #include <stdalign.h>
+            #include <stddef.h>
+
+            /* Test that alignof yields a result consistent with offsetof.
+               This catches GCC bug 52023
+               <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52023>.  */
+            #ifdef __cplusplus
+               template <class t> struct alignof_helper { char a; t b; };
+            # define ao(type) offsetof (alignof_helper<type>, b)
+            #else
+            # define ao(type) offsetof (struct { char a; type b; }, b)
+            #endif
+            char test_double[ao (double) % _Alignof (double) == 0 ? 1 : -1];
+            char test_long[ao (long int) % _Alignof (long int) == 0 ? 1 : -1];
+            char test_alignof[alignof (double) == _Alignof (double) ? 1 : -1];
+
+            /* Test _Alignas only on platforms where gnulib can help.  */
+            #if \
+                ((defined __cplusplus && 201103 <= __cplusplus) \
+                 || (__TINYC__ && defined __attribute__) \
+                 || (defined __APPLE__ && defined __MACH__ \
+                     ? 4 < __GNUC__ + (1 <= __GNUC_MINOR__) \
+                     : __GNUC__) \
+                 || (__ia64 && (61200 <= __HP_cc || 61200 <= __HP_aCC)) \
+                 || __ICC || 0x590 <= __SUNPRO_C || 0x0600 <= __xlC__ \
+                 || 1300 <= _MSC_VER)
+              struct alignas_test { char c; char alignas (8) alignas_8; };
+              char test_alignas[offsetof (struct alignas_test, alignas_8) == 8
+                                ? 1 : -1];
+            #endif
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_working_stdalign_h=yes
+else $as_nop
+  gl_cv_header_working_stdalign_h=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_working_stdalign_h" >&5
+printf "%s\n" "$gl_cv_header_working_stdalign_h" >&6; }
+
+  if test $gl_cv_header_working_stdalign_h = yes; then
+    STDALIGN_H=''
+  else
+    STDALIGN_H='stdalign.h'
+  fi
+
+
+   if test -n "$STDALIGN_H"; then
+  GL_GENERATE_STDALIGN_H_TRUE=
+  GL_GENERATE_STDALIGN_H_FALSE='#'
+else
+  GL_GENERATE_STDALIGN_H_TRUE='#'
+  GL_GENERATE_STDALIGN_H_FALSE=
+fi
+
+
+
+  STDARG_H=''
+  NEXT_STDARG_H='<stdarg.h>'
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for va_copy" >&5
+printf %s "checking for va_copy... " >&6; }
+if test ${gl_cv_func_va_copy+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdarg.h>
+int
+main (void)
+{
+
+#ifndef va_copy
+void (*func) (va_list, va_list) = va_copy;
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_func_va_copy=yes
+else $as_nop
+  gl_cv_func_va_copy=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_va_copy" >&5
+printf "%s\n" "$gl_cv_func_va_copy" >&6; }
+  if test $gl_cv_func_va_copy = no; then
+                                    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined _AIX && !defined __GNUC__
+        AIX vaccine
+       #endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "vaccine" >/dev/null 2>&1
+then :
+  gl_aixcc=yes
+else $as_nop
+  gl_aixcc=no
+fi
+rm -rf conftest*
+
+    if test $gl_aixcc = yes; then
+            STDARG_H=stdarg.h
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_stdarg_h='<'stdarg.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <stdarg.h>" >&5
+printf %s "checking absolute name of <stdarg.h>... " >&6; }
+if test ${gl_cv_next_stdarg_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdarg.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'stdarg.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_stdarg_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_stdarg_h
+           gl_cv_next_stdarg_h='"'$gl_header'"'
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_stdarg_h" >&5
+printf "%s\n" "$gl_cv_next_stdarg_h" >&6; }
+     fi
+     NEXT_STDARG_H=$gl_cv_next_stdarg_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'stdarg.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_stdarg_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_STDARG_H=$gl_next_as_first_directive
+
+
+
+
+            if test "$gl_cv_next_stdarg_h" = '""'; then
+        gl_cv_next_stdarg_h='"///usr/include/stdarg.h"'
+        NEXT_STDARG_H="$gl_cv_next_stdarg_h"
+      fi
+    else
+
+
+  exec 9>&6 6>/dev/null
+
+    if test ${gl_cv_func___va_copy+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdarg.h>
+int
+main (void)
+{
+
+#ifndef __va_copy
+error, bail out
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_func___va_copy=yes
+else $as_nop
+  gl_cv_func___va_copy=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+  exec 6>&9 9>&-
+
+
+      if test $gl_cv_func___va_copy = yes; then
+
+printf "%s\n" "#define va_copy __va_copy" >>confdefs.h
+
+      else
+
+
+printf "%s\n" "#define va_copy gl_va_copy" >>confdefs.h
+
+      fi
+    fi
+  fi
+
+   if test -n "$STDARG_H"; then
+  GL_GENERATE_STDARG_H_TRUE=
+  GL_GENERATE_STDARG_H_FALSE='#'
+else
+  GL_GENERATE_STDARG_H_TRUE='#'
+  GL_GENERATE_STDARG_H_FALSE=
+fi
+
+
+
+
+
+
+
+          if test "$ac_cv_header_stdbool_h" = yes; then
+    case "$host_os" in
+      solaris*)
+        if test -z "$GCC"; then
+          STDBOOL_H='stdbool.h'
+        else
+          STDBOOL_H=''
+        fi
+        ;;
+      *)
+        STDBOOL_H=''
+        ;;
+    esac
+  else
+    STDBOOL_H='stdbool.h'
+  fi
+
+   if test -n "$STDBOOL_H"; then
+  GL_GENERATE_STDBOOL_H_TRUE=
+  GL_GENERATE_STDBOOL_H_FALSE='#'
+else
+  GL_GENERATE_STDBOOL_H_TRUE='#'
+  GL_GENERATE_STDBOOL_H_FALSE=
+fi
+
+
+  if test "$ac_cv_type__Bool" = yes; then
+    HAVE__BOOL=1
+  else
+    HAVE__BOOL=0
+  fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_FSCANF=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FSCANF 1" >>confdefs.h
+
+
+
+
+
+printf "%s\n" "#define GNULIB_FSCANF 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_SCANF=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_SCANF 1" >>confdefs.h
+
+
+
+
+
+printf "%s\n" "#define GNULIB_SCANF 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_FGETC=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FGETC 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_GETC=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_GETC 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_GETCHAR=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_GETCHAR 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_FGETS=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FGETS 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_FREAD=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FREAD 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_FPRINTF=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FPRINTF 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_PRINTF=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_PRINTF 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_VFPRINTF=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_VFPRINTF 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_VPRINTF=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_VPRINTF 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_FPUTC=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FPUTC 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_PUTC=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_PUTC 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_PUTCHAR=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_PUTCHAR 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_FPUTS=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FPUTS 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_PUTS=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_PUTS 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_FWRITE=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FWRITE 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  ac_fn_c_check_func "$LINENO" "stpcpy" "ac_cv_func_stpcpy"
+if test "x$ac_cv_func_stpcpy" = xyes
+then :
+  printf "%s\n" "#define HAVE_STPCPY 1" >>confdefs.h
+
+fi
+
+  if test $ac_cv_func_stpcpy = no; then
+    HAVE_STPCPY=0
+  fi
+
+  if test $HAVE_STPCPY = 0; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS stpcpy.$ac_objext"
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_STPCPY=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_STPCPY 1" >>confdefs.h
+
+
+
+
+
+
+  if test $gl_cv_func_malloc_posix != yes; then
+    REPLACE_STRDUP=1
+  fi
+
+  if test $ac_cv_have_decl_strdup = no; then
+    HAVE_DECL_STRDUP=0
+  fi
+
+  if test $REPLACE_STRDUP = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS strdup.$ac_objext"
+
+    :
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_STRDUP=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_STRDUP 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+  if test "$ERRNO_H:$REPLACE_STRERROR_0" = :0; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working strerror function" >&5
+printf %s "checking for working strerror function... " >&6; }
+if test ${gl_cv_func_working_strerror+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                          # Guess yes on glibc systems.
+           *-gnu* | gnu*) gl_cv_func_working_strerror="guessing yes" ;;
+                          # Guess yes on musl systems.
+           *-musl*)       gl_cv_func_working_strerror="guessing yes" ;;
+                          # If we don't know, obey --enable-cross-guesses.
+           *)             gl_cv_func_working_strerror="$gl_cross_guess_normal" ;;
+         esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <string.h>
+
+int
+main (void)
+{
+if (!*strerror (-2)) return 1;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_working_strerror=yes
+else $as_nop
+  gl_cv_func_working_strerror=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_working_strerror" >&5
+printf "%s\n" "$gl_cv_func_working_strerror" >&6; }
+    case "$gl_cv_func_working_strerror" in
+      *yes) ;;
+      *)
+                        REPLACE_STRERROR=1
+        ;;
+    esac
+
+                  case "$gl_cv_func_strerror_r_works" in
+        *no) REPLACE_STRERROR=1 ;;
+      esac
+
+  else
+            REPLACE_STRERROR=1
+  fi
+
+  if test $REPLACE_STRERROR = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS strerror.$ac_objext"
+
+  fi
+
+
+printf "%s\n" "#define GNULIB_STRERROR 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_STRERROR=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_STRERROR 1" >>confdefs.h
+
+
+
+
+
+  if test -n "$ERRNO_H" || test $REPLACE_STRERROR_0 = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS strerror-override.$ac_objext"
+
+
+
+
+
+  if test $ac_cv_header_sys_socket_h != yes; then
+                    ac_fn_c_check_header_compile "$LINENO" "winsock2.h" "ac_cv_header_winsock2_h" "$ac_includes_default"
+if test "x$ac_cv_header_winsock2_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_WINSOCK2_H 1" >>confdefs.h
+
+fi
+
+  fi
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    HAVE_WINSOCK2_H=1
+    UNISTD_H_HAVE_WINSOCK2_H=1
+    SYS_IOCTL_H_HAVE_WINSOCK2_H=1
+  else
+    HAVE_WINSOCK2_H=0
+  fi
+
+
+  fi
+  if test $gl_cond_libtool = false; then
+    gl_ltlibdeps="$gl_ltlibdeps $LTLIBICONV"
+    gl_libdeps="$gl_libdeps $LIBICONV"
+  fi
+
+
+
+
+
+
+
+
+
+
+
+
+  if test $ac_cv_have_decl_strnlen = no; then
+    HAVE_DECL_STRNLEN=0
+  else
+
+         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working strnlen" >&5
+printf %s "checking for working strnlen... " >&6; }
+if test ${ac_cv_func_strnlen_working+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  # Guess no on AIX systems, yes otherwise.
+		case "$host_os" in
+		  aix*) ac_cv_func_strnlen_working=no;;
+		  *)    ac_cv_func_strnlen_working=yes;;
+		esac
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+int
+main (void)
+{
+
+#define S "foobar"
+#define S_LEN (sizeof S - 1)
+
+  /* At least one implementation is buggy: that of AIX 4.3 would
+     give strnlen (S, 1) == 3.  */
+
+  int i;
+  for (i = 0; i < S_LEN + 1; ++i)
+    {
+      int expected = i <= S_LEN ? i : S_LEN;
+      if (strnlen (S, i) != expected)
+	return 1;
+    }
+  return 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  ac_cv_func_strnlen_working=yes
+else $as_nop
+  ac_cv_func_strnlen_working=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_strnlen_working" >&5
+printf "%s\n" "$ac_cv_func_strnlen_working" >&6; }
+test $ac_cv_func_strnlen_working = no && :
+
+
+    if test $ac_cv_func_strnlen_working = no; then
+      REPLACE_STRNLEN=1
+    fi
+  fi
+
+  if test $HAVE_DECL_STRNLEN = 0 || test $REPLACE_STRNLEN = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS strnlen.$ac_objext"
+
+    :
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_STRNLEN=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_STRNLEN 1" >>confdefs.h
+
+
+
+
+
+  if test $REPLACE_STRSTR = 0; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether strstr works in linear time" >&5
+printf %s "checking whether strstr works in linear time... " >&6; }
+if test ${gl_cv_func_strstr_linear+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+                             cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <features.h>
+#ifdef __GNU_LIBRARY__
+ #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ > 12) || (__GLIBC__ > 2)) \
+     && !(defined __i386__ || defined __x86_64__) \
+     && !defined __UCLIBC__
+  Lucky user
+ #endif
+#endif
+#ifdef __CYGWIN__
+ #include <cygwin/version.h>
+ #if CYGWIN_VERSION_DLL_COMBINED > CYGWIN_VERSION_DLL_MAKE_COMBINED (1007, 7)
+  Lucky user
+ #endif
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Lucky user" >/dev/null 2>&1
+then :
+  gl_cv_func_strstr_linear="guessing yes"
+else $as_nop
+  gl_cv_func_strstr_linear="$gl_cross_guess_normal"
+fi
+rm -rf conftest*
+
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#ifdef __MVS__
+/* z/OS does not deliver signals while strstr() is running (thanks to
+   restrictions on its LE runtime), which prevents us from limiting the
+   running time of this test.  */
+# error "This test does not work properly on z/OS"
+#endif
+#include <signal.h> /* for signal */
+#include <string.h> /* for strstr */
+#include <stdlib.h> /* for malloc */
+#include <unistd.h> /* for alarm */
+static void quit (int sig) { _exit (sig + 128); }
+
+int
+main (void)
+{
+
+    int result = 0;
+    size_t m = 1000000;
+    char *haystack = (char *) malloc (2 * m + 2);
+    char *needle = (char *) malloc (m + 2);
+    /* Failure to compile this test due to missing alarm is okay,
+       since all such platforms (mingw) also have quadratic strstr.  */
+    signal (SIGALRM, quit);
+    alarm (5);
+    /* Check for quadratic performance.  */
+    if (haystack && needle)
+      {
+        memset (haystack, 'A', 2 * m);
+        haystack[2 * m] = 'B';
+        haystack[2 * m + 1] = 0;
+        memset (needle, 'A', m);
+        needle[m] = 'B';
+        needle[m + 1] = 0;
+        if (!strstr (haystack, needle))
+          result |= 1;
+      }
+    /* Free allocated memory, in case some sanitizer is watching.  */
+    free (haystack);
+    free (needle);
+    return result;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_strstr_linear=yes
+else $as_nop
+  gl_cv_func_strstr_linear=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_strstr_linear" >&5
+printf "%s\n" "$gl_cv_func_strstr_linear" >&6; }
+    case "$gl_cv_func_strstr_linear" in
+      *yes) ;;
+      *)
+        REPLACE_STRSTR=1
+        ;;
+    esac
+  fi
+
+  if test $REPLACE_STRSTR = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS strstr.$ac_objext"
+
+  fi
+
+
+
+  if test $REPLACE_MEMCHR = 1; then
+    REPLACE_STRSTR=1
+  else
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether strstr works" >&5
+printf %s "checking whether strstr works... " >&6; }
+if test ${gl_cv_func_strstr_works_always+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+                                                    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <string.h> /* for __GNU_LIBRARY__ */
+#ifdef __GNU_LIBRARY__
+ #include <features.h>
+ #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ > 12) || (__GLIBC__ > 2)) \
+     || defined __UCLIBC__
+  Lucky user
+ #endif
+#elif defined __CYGWIN__
+ #include <cygwin/version.h>
+ #if CYGWIN_VERSION_DLL_COMBINED > CYGWIN_VERSION_DLL_MAKE_COMBINED (1007, 7)
+  Lucky user
+ #endif
+#else
+  Lucky user
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Lucky user" >/dev/null 2>&1
+then :
+  gl_cv_func_strstr_works_always="guessing yes"
+else $as_nop
+  gl_cv_func_strstr_works_always="$gl_cross_guess_normal"
+fi
+rm -rf conftest*
+
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <string.h> /* for __GNU_LIBRARY__, strstr */
+#ifdef __GNU_LIBRARY__
+ #include <features.h>
+ #if __GLIBC__ == 2 && __GLIBC_MINOR__ == 28
+  Unlucky user
+ #endif
+#endif
+#define P "_EF_BF_BD"
+#define HAYSTACK "F_BD_CE_BD" P P P P "_C3_88_20" P P P "_C3_A7_20" P
+#define NEEDLE P P P P P
+
+int
+main (void)
+{
+return !!strstr (HAYSTACK, NEEDLE);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_strstr_works_always=yes
+else $as_nop
+  gl_cv_func_strstr_works_always=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_strstr_works_always" >&5
+printf "%s\n" "$gl_cv_func_strstr_works_always" >&6; }
+    case "$gl_cv_func_strstr_works_always" in
+      *yes) ;;
+      *)
+        REPLACE_STRSTR=1
+        ;;
+    esac
+  fi
+
+  if test $REPLACE_STRSTR = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS strstr.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_STRSTR=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_STRSTR 1" >>confdefs.h
+
+
+
+
+
+
+
+
+  if test "$ac_cv_have_decl_strtoimax" != yes; then
+    HAVE_DECL_STRTOIMAX=0
+  fi
+
+  if test "$ac_cv_func_strtoimax" = yes; then
+    HAVE_STRTOIMAX=1
+             { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether strtoimax works" >&5
+printf %s "checking whether strtoimax works... " >&6; }
+if test ${gl_cv_func_strtoimax+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                    # Guess no on AIX 5.
+            aix5*)  gl_cv_func_strtoimax="guessing no" ;;
+                    # Guess yes on native Windows.
+            mingw*) gl_cv_func_strtoimax="guessing yes" ;;
+                    # Guess yes otherwise.
+            *)      gl_cv_func_strtoimax="guessing yes" ;;
+          esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <errno.h>
+#include <string.h>
+#include <inttypes.h>
+int main ()
+{
+  if (sizeof (intmax_t) > sizeof (int))
+    {
+      const char *s = "4294967295";
+      char *p;
+      intmax_t res;
+      errno = 0;
+      res = strtoimax (s, &p, 10);
+      if (p != s + strlen (s))
+        return 1;
+      if (errno != 0)
+        return 2;
+      if (res != (intmax_t) 65535 * (intmax_t) 65537)
+        return 3;
+    }
+  else
+    {
+      const char *s = "2147483647";
+      char *p;
+      intmax_t res;
+      errno = 0;
+      res = strtoimax (s, &p, 10);
+      if (p != s + strlen (s))
+        return 1;
+      if (errno != 0)
+        return 2;
+      if (res != 2147483647)
+        return 3;
+    }
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_strtoimax=yes
+else $as_nop
+  gl_cv_func_strtoimax=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_strtoimax" >&5
+printf "%s\n" "$gl_cv_func_strtoimax" >&6; }
+    case "$gl_cv_func_strtoimax" in
+      *no) REPLACE_STRTOIMAX=1 ;;
+    esac
+  else
+    if test "$ac_cv_have_decl_strtoimax" = yes; then
+      # HP-UX 11.11 has "#define strtoimax(...) ..." but no function.
+      REPLACE_STRTOIMAX=1
+    fi
+    HAVE_STRTOIMAX=0
+  fi
+
+  if test $HAVE_DECL_STRTOIMAX = 0 || test $REPLACE_STRTOIMAX = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS strtoimax.$ac_objext"
+
+
+  ac_fn_check_decl "$LINENO" "strtoll" "ac_cv_have_decl_strtoll" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_strtoll" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_STRTOLL $ac_have_decl" >>confdefs.h
+
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_STRTOIMAX=1
+
+
+
+
+
+
+
+  ac_fn_c_check_func "$LINENO" "strtoll" "ac_cv_func_strtoll"
+if test "x$ac_cv_func_strtoll" = xyes
+then :
+  printf "%s\n" "#define HAVE_STRTOLL 1" >>confdefs.h
+
+fi
+
+  if test $ac_cv_func_strtoll = yes; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether strtoll works" >&5
+printf %s "checking whether strtoll works... " >&6; }
+if test ${gl_cv_func_strtoll_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                    # Guess no on native Windows.
+            mingw*) gl_cv_func_strtoll_works="guessing no" ;;
+            *)      gl_cv_func_strtoll_works="$gl_cross_guess_normal" ;;
+          esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdlib.h>
+int
+main (void)
+{
+int result = 0;
+              char *term;
+              /* This test fails on Minix and native Windows.  */
+              {
+                const char input[] = "0x";
+                (void) strtoll (input, &term, 16);
+                if (term != input + 1)
+                  result |= 1;
+              }
+              return result;
+
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_strtoll_works=yes
+else $as_nop
+  gl_cv_func_strtoll_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_strtoll_works" >&5
+printf "%s\n" "$gl_cv_func_strtoll_works" >&6; }
+    case "$gl_cv_func_strtoll_works" in
+      *yes) ;;
+      *)    REPLACE_STRTOLL=1 ;;
+    esac
+  else
+    HAVE_STRTOLL=0
+  fi
+
+  if test $HAVE_STRTOLL = 0 || test $REPLACE_STRTOLL = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS strtoll.$ac_objext"
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_STRTOLL=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_STRTOLL 1" >>confdefs.h
+
+
+
+
+
+
+  ac_fn_c_check_func "$LINENO" "strtoull" "ac_cv_func_strtoull"
+if test "x$ac_cv_func_strtoull" = xyes
+then :
+  printf "%s\n" "#define HAVE_STRTOULL 1" >>confdefs.h
+
+fi
+
+  if test $ac_cv_func_strtoull = yes; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether strtoull works" >&5
+printf %s "checking whether strtoull works... " >&6; }
+if test ${gl_cv_func_strtoull_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                    # Guess no on native Windows.
+            mingw*) gl_cv_func_strtoull_works="guessing no" ;;
+            *)      gl_cv_func_strtoull_works="$gl_cross_guess_normal" ;;
+          esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdlib.h>
+int
+main (void)
+{
+int result = 0;
+              char *term;
+              /* This test fails on Minix and native Windows.  */
+              {
+                const char input[] = "0x";
+                (void) strtoull (input, &term, 16);
+                if (term != input + 1)
+                  result |= 1;
+              }
+              return result;
+
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_strtoull_works=yes
+else $as_nop
+  gl_cv_func_strtoull_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_strtoull_works" >&5
+printf "%s\n" "$gl_cv_func_strtoull_works" >&6; }
+    case "$gl_cv_func_strtoull_works" in
+      *yes) ;;
+      *)    REPLACE_STRTOULL=1 ;;
+    esac
+  else
+    HAVE_STRTOULL=0
+  fi
+
+  if test $HAVE_STRTOULL = 0 || test $REPLACE_STRTOULL = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS strtoull.$ac_objext"
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_STRTOULL=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_STRTOULL 1" >>confdefs.h
+
+
+
+
+
+
+
+
+  if test "$ac_cv_have_decl_strtoumax" = yes; then
+    if test "$ac_cv_func_strtoumax" != yes; then
+      # HP-UX 11.11 has "#define strtoimax(...) ..." but no function.
+      REPLACE_STRTOUMAX=1
+    fi
+  else
+    HAVE_DECL_STRTOUMAX=0
+  fi
+
+  if test $HAVE_DECL_STRTOUMAX = 0 || test $REPLACE_STRTOUMAX = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS strtoumax.$ac_objext"
+
+
+  ac_fn_check_decl "$LINENO" "strtoull" "ac_cv_have_decl_strtoull" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_strtoull" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_STRTOULL $ac_have_decl" >>confdefs.h
+
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_STRTOUMAX=1
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+      if  { test "$HAVE_LIBUNISTRING" != yes \
+    || {
+
+
+
+            test $LIBUNISTRING_VERSION_MAJOR -lt 0 \
+            || { test $LIBUNISTRING_VERSION_MAJOR -eq 0 \
+                 && { test $LIBUNISTRING_VERSION_MINOR -lt 9 \
+                      || { test $LIBUNISTRING_VERSION_MINOR -eq 9 \
+                           && test $LIBUNISTRING_VERSION_SUBMINOR -lt 11
+                         }
+                    }
+               }
+
+
+
+
+       }
+  }; then
+    LIBUNISTRING_UNISTR_H='unistr.h'
+  else
+    LIBUNISTRING_UNISTR_H=
+  fi
+
+
+
+
+printf "%s\n" "#define GNULIB_UNISTR_U8_MBTOUCR 1" >>confdefs.h
+
+
+
+
+       if  { test "$HAVE_LIBUNISTRING" != yes \
+    || {
+
+
+
+            test $LIBUNISTRING_VERSION_MAJOR -lt 0 \
+            || { test $LIBUNISTRING_VERSION_MAJOR -eq 0 \
+                 && { test $LIBUNISTRING_VERSION_MINOR -lt 9 \
+                      || { test $LIBUNISTRING_VERSION_MINOR -eq 9 \
+                           && test $LIBUNISTRING_VERSION_SUBMINOR -lt 0
+                         }
+                    }
+               }
+
+
+
+
+       }
+  }; then
+  LIBUNISTRING_COMPILE_UNISTR_U8_MBTOUCR_TRUE=
+  LIBUNISTRING_COMPILE_UNISTR_U8_MBTOUCR_FALSE='#'
+else
+  LIBUNISTRING_COMPILE_UNISTR_U8_MBTOUCR_TRUE='#'
+  LIBUNISTRING_COMPILE_UNISTR_U8_MBTOUCR_FALSE=
+fi
+
+
+
+
+printf "%s\n" "#define GNULIB_UNISTR_U8_UCTOMB 1" >>confdefs.h
+
+
+
+
+       if  { test "$HAVE_LIBUNISTRING" != yes \
+    || {
+
+
+
+            test $LIBUNISTRING_VERSION_MAJOR -lt 0 \
+            || { test $LIBUNISTRING_VERSION_MAJOR -eq 0 \
+                 && { test $LIBUNISTRING_VERSION_MINOR -lt 9 \
+                      || { test $LIBUNISTRING_VERSION_MINOR -eq 9 \
+                           && test $LIBUNISTRING_VERSION_SUBMINOR -lt 0
+                         }
+                    }
+               }
+
+
+
+
+       }
+  }; then
+  LIBUNISTRING_COMPILE_UNISTR_U8_UCTOMB_TRUE=
+  LIBUNISTRING_COMPILE_UNISTR_U8_UCTOMB_FALSE='#'
+else
+  LIBUNISTRING_COMPILE_UNISTR_U8_UCTOMB_TRUE='#'
+  LIBUNISTRING_COMPILE_UNISTR_U8_UCTOMB_FALSE=
+fi
+
+
+
+
+      if  { test "$HAVE_LIBUNISTRING" != yes \
+    || {
+
+
+
+            test $LIBUNISTRING_VERSION_MAJOR -lt 0 \
+            || { test $LIBUNISTRING_VERSION_MAJOR -eq 0 \
+                 && { test $LIBUNISTRING_VERSION_MINOR -lt 9 \
+                      || { test $LIBUNISTRING_VERSION_MINOR -eq 9 \
+                           && test $LIBUNISTRING_VERSION_SUBMINOR -lt 11
+                         }
+                    }
+               }
+
+
+
+
+       }
+  }; then
+    LIBUNISTRING_UNITYPES_H='unitypes.h'
+  else
+    LIBUNISTRING_UNITYPES_H=
+  fi
+
+
+
+
+
+      if  { test "$HAVE_LIBUNISTRING" != yes \
+    || {
+
+
+
+            test $LIBUNISTRING_VERSION_MAJOR -lt 0 \
+            || { test $LIBUNISTRING_VERSION_MAJOR -eq 0 \
+                 && { test $LIBUNISTRING_VERSION_MINOR -lt 9 \
+                      || { test $LIBUNISTRING_VERSION_MINOR -eq 9 \
+                           && test $LIBUNISTRING_VERSION_SUBMINOR -lt 11
+                         }
+                    }
+               }
+
+
+
+
+       }
+  }; then
+    LIBUNISTRING_UNIWIDTH_H='uniwidth.h'
+  else
+    LIBUNISTRING_UNIWIDTH_H=
+  fi
+
+
+
+
+       if  { test "$HAVE_LIBUNISTRING" != yes \
+    || {
+
+
+
+            test $LIBUNISTRING_VERSION_MAJOR -lt 0 \
+            || { test $LIBUNISTRING_VERSION_MAJOR -eq 0 \
+                 && { test $LIBUNISTRING_VERSION_MINOR -lt 9 \
+                      || { test $LIBUNISTRING_VERSION_MINOR -eq 9 \
+                           && test $LIBUNISTRING_VERSION_SUBMINOR -lt 8
+                         }
+                    }
+               }
+
+
+
+
+       }
+  }; then
+  LIBUNISTRING_COMPILE_UNIWIDTH_WIDTH_TRUE=
+  LIBUNISTRING_COMPILE_UNIWIDTH_WIDTH_FALSE='#'
+else
+  LIBUNISTRING_COMPILE_UNIWIDTH_WIDTH_TRUE='#'
+  LIBUNISTRING_COMPILE_UNIWIDTH_WIDTH_FALSE=
+fi
+
+
+
+printf "%s\n" "#define GNULIB_STDIO_SINGLE_THREAD 1" >>confdefs.h
+
+
+printf "%s\n" "#define USE_UNLOCKED_IO GNULIB_STDIO_SINGLE_THREAD" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+# Check whether --with-packager was given.
+if test ${with_packager+y}
+then :
+  withval=$with_packager;       case $withval in
+        yes|no) ;;
+        *)
+printf "%s\n" "#define PACKAGE_PACKAGER \"$withval\"" >>confdefs.h
+ ;;
+      esac
+
+fi
+
+
+
+# Check whether --with-packager-version was given.
+if test ${with_packager_version+y}
+then :
+  withval=$with_packager_version;       case $withval in
+        yes|no) ;;
+        *)
+printf "%s\n" "#define PACKAGE_PACKAGER_VERSION \"$withval\"" >>confdefs.h
+ ;;
+      esac
+
+fi
+
+
+
+# Check whether --with-packager-bug-reports was given.
+if test ${with_packager_bug_reports+y}
+then :
+  withval=$with_packager_bug_reports;       case $withval in
+        yes|no) ;;
+        *)
+printf "%s\n" "#define PACKAGE_PACKAGER_BUG_REPORTS \"$withval\"" >>confdefs.h
+ ;;
+      esac
+
+fi
+
+
+  if test "X$with_packager" = "X" && \
+     test "X$with_packager_version$with_packager_bug_reports" != "X"
+  then
+    as_fn_error $? "The --with-packager-{bug-reports,version} options require --with-packager" "$LINENO" 5
+  fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+        if case "$host_os" in
+       mingw*) true ;;
+       *) test $ac_cv_func_mbsinit = yes ;;
+     esac \
+    && test $ac_cv_func_mbrtowc = yes; then
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc handles incomplete characters" >&5
+printf %s "checking whether mbrtowc handles incomplete characters... " >&6; }
+if test ${gl_cv_func_mbrtowc_incomplete_state+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                     # Guess no on AIX and OSF/1.
+        aix* | osf*) gl_cv_func_mbrtowc_incomplete_state="guessing no" ;;
+                     # Guess yes otherwise.
+        *)           gl_cv_func_mbrtowc_incomplete_state="guessing yes" ;;
+      esac
+      if test $LOCALE_JA != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      const char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        if (mbsinit (&state))
+          return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_incomplete_state=yes
+else $as_nop
+  gl_cv_func_mbrtowc_incomplete_state=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      else
+        if test $LOCALE_FR_UTF8 != none; then
+          if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      const char input[] = "B\303\274\303\237er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        if (mbsinit (&state))
+          return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_incomplete_state=yes
+else $as_nop
+  gl_cv_func_mbrtowc_incomplete_state=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+        fi
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_incomplete_state" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_incomplete_state" >&6; }
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc works as well as mbtowc" >&5
+printf %s "checking whether mbrtowc works as well as mbtowc... " >&6; }
+if test ${gl_cv_func_mbrtowc_sanitycheck+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                    # Guess no on Solaris 8.
+        solaris2.8) gl_cv_func_mbrtowc_sanitycheck="guessing no" ;;
+                    # Guess yes otherwise.
+        *)          gl_cv_func_mbrtowc_sanitycheck="guessing yes" ;;
+      esac
+      if test $LOCALE_ZH_CN != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  /* This fails on Solaris 8:
+     mbrtowc returns 2, and sets wc to 0x00F0.
+     mbtowc returns 4 (correct) and sets wc to 0x5EDC.  */
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      char input[] = "B\250\271\201\060\211\070er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 3, 6, &state) != 4
+          && mbtowc (&wc, input + 3, 6) == 4)
+        return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_sanitycheck=yes
+else $as_nop
+  gl_cv_func_mbrtowc_sanitycheck=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_sanitycheck" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_sanitycheck" >&6; }
+
+    REPLACE_MBSTATE_T=0
+    case "$gl_cv_func_mbrtowc_incomplete_state" in
+      *yes) ;;
+      *) REPLACE_MBSTATE_T=1 ;;
+    esac
+    case "$gl_cv_func_mbrtowc_sanitycheck" in
+      *yes) ;;
+      *) REPLACE_MBSTATE_T=1 ;;
+    esac
+  else
+    REPLACE_MBSTATE_T=1
+  fi
+
+
+
+  if test $ac_cv_func_wcrtomb = no; then
+    HAVE_WCRTOMB=0
+    ac_fn_check_decl "$LINENO" "wcrtomb" "ac_cv_have_decl_wcrtomb" "
+      #include <wchar.h>
+
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_wcrtomb" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_WCRTOMB $ac_have_decl" >>confdefs.h
+
+    if test $ac_cv_have_decl_wcrtomb = yes; then
+                        REPLACE_WCRTOMB=1
+    fi
+  else
+                        if test $REPLACE_WCRTOMB = 0; then
+
+
+
+
+
+             { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether wcrtomb works in the C locale" >&5
+printf %s "checking whether wcrtomb works in the C locale... " >&6; }
+if test ${gl_cv_func_wcrtomb_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                               # Guess no on Android.
+              linux*-android*) gl_cv_func_wcrtomb_works="guessing no";;
+                               # Guess yes otherwise.
+              *)               gl_cv_func_wcrtomb_works="guessing yes";;
+            esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <string.h>
+#include <stdlib.h>
+#include <wchar.h>
+int main ()
+{
+  mbstate_t state;
+  char out[64];
+  int count;
+  memset (&state, 0, sizeof (state));
+  out[0] = 'x';
+  count = wcrtomb (out, L'a', &state);
+  return !(count == 1 && out[0] == 'a');
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_wcrtomb_works=yes
+else $as_nop
+  gl_cv_func_wcrtomb_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_wcrtomb_works" >&5
+printf "%s\n" "$gl_cv_func_wcrtomb_works" >&6; }
+      case "$gl_cv_func_wcrtomb_works" in
+        *yes) ;;
+        *)
+printf "%s\n" "#define WCRTOMB_C_LOCALE_BUG 1" >>confdefs.h
+
+           REPLACE_WCRTOMB=1 ;;
+      esac
+    fi
+    if test $REPLACE_WCRTOMB = 0; then
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether wcrtomb return value is correct" >&5
+printf %s "checking whether wcrtomb return value is correct... " >&6; }
+if test ${gl_cv_func_wcrtomb_retval+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                              case "$host_os" in
+            # Guess no on AIX 4, OSF/1, Solaris, native Windows.
+            aix4* | osf* | solaris* | mingw*) gl_cv_func_wcrtomb_retval="guessing no" ;;
+            # Guess yes otherwise.
+            *)                                gl_cv_func_wcrtomb_retval="guessing yes" ;;
+          esac
+          if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then
+            if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+#include <stdlib.h>
+int main ()
+{
+  int result = 0;
+  if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
+    {
+      if (wcrtomb (NULL, 0, NULL) != 1)
+        result |= 1;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      if (wcrtomb (NULL, 0, NULL) != 1)
+        result |= 2;
+      {
+        wchar_t wc = (wchar_t) 0xBADFACE;
+        if (mbtowc (&wc, "\303\274", 2) == 2)
+          if (wcrtomb (NULL, wc, NULL) != 1)
+            result |= 2;
+      }
+    }
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      if (wcrtomb (NULL, 0, NULL) != 1)
+        result |= 4;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      if (wcrtomb (NULL, 0, NULL) != 1)
+        result |= 8;
+    }
+  return result;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_wcrtomb_retval=yes
+else $as_nop
+  gl_cv_func_wcrtomb_retval=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+          fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_wcrtomb_retval" >&5
+printf "%s\n" "$gl_cv_func_wcrtomb_retval" >&6; }
+      case "$gl_cv_func_wcrtomb_retval" in
+        *yes) ;;
+        *)
+printf "%s\n" "#define WCRTOMB_RETVAL_BUG 1" >>confdefs.h
+
+           REPLACE_WCRTOMB=1 ;;
+      esac
+    fi
+  fi
+
+  if test $HAVE_WCRTOMB = 0 || test $REPLACE_WCRTOMB = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS wcrtomb.$ac_objext"
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_WCRTOMB=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_WCRTOMB 1" >>confdefs.h
+
+
+
+
+
+
+
+  if test $ac_cv_func_wctob = no; then
+    HAVE_WCTOB=0
+    HAVE_DECL_WCTOB=0
+  else
+    HAVE_WCTOB=1
+
+
+
+         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether wctob works" >&5
+printf %s "checking whether wctob works... " >&6; }
+if test ${gl_cv_func_wctob_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                        case "$host_os" in
+            # Guess no on Solaris <= 9 and Cygwin.
+          solaris2.[1-9] | solaris2.[1-9].* | cygwin*)
+            gl_cv_func_wctob_works="guessing no" ;;
+            # Guess no on native Windows.
+          mingw*)
+            gl_cv_func_wctob_works="guessing no" ;;
+            # Guess yes otherwise.
+          *) gl_cv_func_wctob_works="guessing yes" ;;
+        esac
+        case "$host_os" in
+          cygwin*)
+            if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <wchar.h>
+
+register long global __asm__ ("%ebx");
+
+int main ()
+{
+  setlocale (LC_ALL, "en_US.UTF-8");
+
+  global = 0x12345678;
+  if (wctob (0x00FC) != -1)
+    return 1;
+  if (global != 0x12345678)
+    return 2;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  :
+else $as_nop
+  gl_cv_func_wctob_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+            ;;
+        esac
+        if test "$gl_cv_func_wctob_works" != no && test $LOCALE_FR != none; then
+          if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
+    {
+      wchar_t wc;
+
+      if (mbtowc (&wc, "\374", 1) == 1)
+        if (wctob (wc) != (unsigned char) '\374')
+          return 1;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_wctob_works=yes
+else $as_nop
+  gl_cv_func_wctob_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+        fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_wctob_works" >&5
+printf "%s\n" "$gl_cv_func_wctob_works" >&6; }
+    case "$gl_cv_func_wctob_works" in
+      *yes) ;;
+      *) REPLACE_WCTOB=1 ;;
+    esac
+    if test $REPLACE_WCTOB = 0; then
+
+            ac_fn_check_decl "$LINENO" "wctob" "ac_cv_have_decl_wctob" "
+        #include <wchar.h>
+
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_wctob" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_WCTOB $ac_have_decl" >>confdefs.h
+
+      if test $ac_cv_have_decl_wctob != yes; then
+        HAVE_DECL_WCTOB=0
+      fi
+    fi
+  fi
+
+  if test $HAVE_WCTOB = 0 || test $REPLACE_WCTOB = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS wctob.$ac_objext"
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_WCTOB=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_WCTOB 1" >>confdefs.h
+
+
+
+
+
+
+  if false; then
+    REPLACE_WCTOMB=1
+  fi
+
+  if test $REPLACE_WCTOMB = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS wctomb.$ac_objext"
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_WCTOMB=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_WCTOMB 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  ac_fn_check_decl "$LINENO" "wcwidth" "ac_cv_have_decl_wcwidth" "
+    #include <wchar.h>
+
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_wcwidth" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_WCWIDTH $ac_have_decl" >>confdefs.h
+
+  if test $ac_cv_have_decl_wcwidth != yes; then
+    HAVE_DECL_WCWIDTH=0
+  fi
+
+  if test $ac_cv_func_wcwidth != yes; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether wcwidth is a macro" >&5
+printf %s "checking whether wcwidth is a macro... " >&6; }
+if test ${gl_cv_func_wcwidth_macro+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <wchar.h>
+#ifdef wcwidth
+ wchar_header_defines_wcwidth
+#endif
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "wchar_header_defines_wcwidth" >/dev/null 2>&1
+then :
+  gl_cv_func_wcwidth_macro=yes
+else $as_nop
+  gl_cv_func_wcwidth_macro=no
+fi
+rm -rf conftest*
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_wcwidth_macro" >&5
+printf "%s\n" "$gl_cv_func_wcwidth_macro" >&6; }
+  fi
+
+  if test $ac_cv_func_wcwidth = yes || test $gl_cv_func_wcwidth_macro = yes; then
+    HAVE_WCWIDTH=1
+                                        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether wcwidth works reasonably in UTF-8 locales" >&5
+printf %s "checking whether wcwidth works reasonably in UTF-8 locales... " >&6; }
+if test ${gl_cv_func_wcwidth_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+        if test "$cross_compiling" = yes
+then :
+
+           case "$host_os" in
+                            # Guess yes on glibc systems.
+             *-gnu* | gnu*) gl_cv_func_wcwidth_works="guessing yes";;
+                            # Guess yes on musl systems.
+             *-musl*)       gl_cv_func_wcwidth_works="guessing yes";;
+                            # Guess yes on AIX 7 systems.
+             aix[7-9]*)     gl_cv_func_wcwidth_works="guessing yes";;
+             *)             gl_cv_func_wcwidth_works="$gl_cross_guess_normal";;
+           esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <wchar.h>
+#if !HAVE_DECL_WCWIDTH
+extern
+# ifdef __cplusplus
+"C"
+# endif
+int wcwidth (int);
+#endif
+int main ()
+{
+  int result = 0;
+  if (setlocale (LC_ALL, "en_US.UTF-8") != NULL)
+    {
+      if (wcwidth (0x0301) > 0)
+        result |= 1;
+      if (wcwidth (0x05B0) > 0)
+        result |= 2;
+      if (wcwidth (0x200B) > 0)
+        result |= 4;
+      if (wcwidth (0xFF1A) == 0)
+        result |= 8;
+      if (wcwidth (0x2202) > 1)
+        result |= 16;
+    }
+  return result;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_wcwidth_works=yes
+else $as_nop
+  gl_cv_func_wcwidth_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_wcwidth_works" >&5
+printf "%s\n" "$gl_cv_func_wcwidth_works" >&6; }
+    case "$gl_cv_func_wcwidth_works" in
+      *yes) ;;
+      *no) REPLACE_WCWIDTH=1 ;;
+    esac
+  else
+    HAVE_WCWIDTH=0
+  fi
+
+  if test $HAVE_WCWIDTH = 0 || test $REPLACE_WCWIDTH = 1; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS wcwidth.$ac_objext"
+
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_WCWIDTH=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_WCWIDTH 1" >>confdefs.h
+
+
+
+
+  case "$host_os" in
+    mingw*)
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS windows-mutex.$ac_objext"
+
+      ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS windows-once.$ac_objext"
+
+      ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS windows-recmutex.$ac_objext"
+
+      ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS windows-rwlock.$ac_objext"
+
+      ;;
+  esac
+
+
+
+
+
+
+
+  case "$host_os" in
+    mingw*)
+  GL_GNULIB_OVERRIDES_STRUCT_STAT=1
+
+ ;;
+  esac
+
+
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for wmemchr" >&5
+printf %s "checking for wmemchr... " >&6; }
+if test ${gl_cv_func_wmemchr+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <wchar.h>
+
+int
+main (void)
+{
+return ! wmemchr ((const wchar_t *) 0, (wchar_t) ' ', 0);
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_func_wmemchr=yes
+else $as_nop
+  gl_cv_func_wmemchr=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_wmemchr" >&5
+printf "%s\n" "$gl_cv_func_wmemchr" >&6; }
+  if test $gl_cv_func_wmemchr = no; then
+    HAVE_WMEMCHR=0
+  fi
+
+  if test $HAVE_WMEMCHR = 0; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS wmemchr.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_WMEMCHR=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_WMEMCHR 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+  if test $ac_cv_func_wmempcpy = no; then
+    HAVE_WMEMPCPY=0
+  fi
+
+  if test $HAVE_WMEMPCPY = 0; then
+
+
+
+
+
+
+
+
+  gl_LIBOBJS="$gl_LIBOBJS wmempcpy.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_WMEMPCPY=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_WMEMPCPY 1" >>confdefs.h
+
+
+
+  :
+
+
+printf "%s\n" "#define GNULIB_XALLOC 1" >>confdefs.h
+
+
+
+
+printf "%s\n" "#define GNULIB_XALLOC_DIE 1" >>confdefs.h
+
+
+
+  :
+
+  # End of code from modules
+
+
+
+
+
+
+
+
+
+
+
+  gltests_libdeps=
+  gltests_ltlibdeps=
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  gl_source_base='gnulib-tests'
+  gltests_WITNESS=IN_`echo "${PACKAGE-$PACKAGE_TARNAME}" | LC_ALL=C tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ | LC_ALL=C sed -e 's/[^A-Z0-9_]/_/g'`_GNULIB_TESTS
+
+  gl_module_indicator_condition=$gltests_WITNESS
+
+
+  if test "$ac_cv_header_winsock2_h" = yes; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS accept.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_ACCEPT" != 1; then
+        if test "$GL_GNULIB_ACCEPT" = 0; then
+      GL_GNULIB_ACCEPT=$gl_module_indicator_condition
+    else
+      GL_GNULIB_ACCEPT="($GL_GNULIB_ACCEPT || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_ACCEPT 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+  if test "$ac_cv_header_winsock2_h" = yes; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS bind.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_BIND" != 1; then
+        if test "$GL_GNULIB_BIND" = 0; then
+      GL_GNULIB_BIND=$gl_module_indicator_condition
+    else
+      GL_GNULIB_BIND="($GL_GNULIB_BIND || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_BIND 1" >>confdefs.h
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a traditional french locale" >&5
+printf %s "checking for a traditional french locale... " >&6; }
+if test ${gt_cv_locale_fr+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is only
+     one byte long. This excludes the UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 3 || buf[2] != 'v') return 1;
+# if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+# endif
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the native Windows locale name.
+          if (LC_ALL=French_France.1252 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=French_France.1252
+          else
+            # None found.
+            gt_cv_locale_fr=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.ISO-8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr=fr_FR.ISO-8859-1
+            else
+              # Test for the AIX, OSF/1, FreeBSD, NetBSD, OpenBSD locale name.
+              if (LC_ALL=fr_FR.ISO8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr=fr_FR.ISO8859-1
+              else
+                # Test for the HP-UX locale name.
+                if (LC_ALL=fr_FR.iso88591 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_fr=fr_FR.iso88591
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=fr LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_fr=fr
+                  else
+                    # None found.
+                    gt_cv_locale_fr=none
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr" >&5
+printf "%s\n" "$gt_cv_locale_fr" >&6; }
+  LOCALE_FR=$gt_cv_locale_fr
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a french Unicode locale" >&5
+printf %s "checking for a french Unicode locale... " >&6; }
+if test ${gt_cv_locale_fr_utf8+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if !(defined __BEOS__ || defined __HAIKU__)
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is
+     two bytes long, with UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 4
+      || buf[1] != (char) 0xc3 || buf[2] != (char) 0xa9 || buf[3] != 'v')
+    return 1;
+#endif
+#if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+#endif
+  return 0;
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=French_France.65001 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=French_France.65001
+          else
+            # None found.
+            gt_cv_locale_fr_utf8=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr_utf8=fr_FR.UTF-8
+            else
+              # Test for the Solaris 7 locale name.
+              if (LC_ALL=fr.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr_utf8=fr.UTF-8
+              else
+                # None found.
+                gt_cv_locale_fr_utf8=none
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr_utf8" >&5
+printf "%s\n" "$gt_cv_locale_fr_utf8" >&6; }
+  LOCALE_FR_UTF8=$gt_cv_locale_fr_utf8
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a traditional french locale" >&5
+printf %s "checking for a traditional french locale... " >&6; }
+if test ${gt_cv_locale_fr+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is only
+     one byte long. This excludes the UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 3 || buf[2] != 'v') return 1;
+# if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+# endif
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the native Windows locale name.
+          if (LC_ALL=French_France.1252 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=French_France.1252
+          else
+            # None found.
+            gt_cv_locale_fr=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.ISO-8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr=fr_FR.ISO-8859-1
+            else
+              # Test for the AIX, OSF/1, FreeBSD, NetBSD, OpenBSD locale name.
+              if (LC_ALL=fr_FR.ISO8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr=fr_FR.ISO8859-1
+              else
+                # Test for the HP-UX locale name.
+                if (LC_ALL=fr_FR.iso88591 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_fr=fr_FR.iso88591
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=fr LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_fr=fr
+                  else
+                    # None found.
+                    gt_cv_locale_fr=none
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr" >&5
+printf "%s\n" "$gt_cv_locale_fr" >&6; }
+  LOCALE_FR=$gt_cv_locale_fr
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a turkish Unicode locale" >&5
+printf %s "checking for a turkish Unicode locale... " >&6; }
+if test ${gt_cv_locale_tr_utf8+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+#include <wctype.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  But BeOS does not
+     implement the Turkish upper-/lowercase mappings.  Therefore, let this
+     program return 1 on BeOS.  */
+  /* Check whether the given locale name is recognized by the system.  */
+#if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+#else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+#endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the tr_TR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+#if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+#endif
+#ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+#endif
+  /* Check whether in the abbreviation of the eighth month, the second
+     character (should be U+011F: LATIN SMALL LETTER G WITH BREVE) is
+     two bytes long, with UTF-8 encoding.  */
+  t.tm_year = 1992 - 1900; t.tm_mon = 8 - 1; t.tm_mday = 19;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 4
+      || buf[1] != (char) 0xc4 || buf[2] != (char) 0x9f)
+    return 1;
+  /* Check whether the upper-/lowercase mappings are as expected for
+     Turkish.  */
+  if (towupper ('i') != 0x0130 || towlower (0x0130) != 'i'
+      || towupper(0x0131) != 'I' || towlower ('I') != 0x0131)
+    return 1;
+  return 0;
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=Turkish_Turkey.65001 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_tr_utf8=Turkish_Turkey.65001
+          else
+            # None found.
+            gt_cv_locale_tr_utf8=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=tr_TR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_tr_utf8=tr_TR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=tr_TR.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_tr_utf8=tr_TR.UTF-8
+            else
+              # Test for the Solaris 7 locale name.
+              if (LC_ALL=tr.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_tr_utf8=tr.UTF-8
+              else
+                # None found.
+                gt_cv_locale_tr_utf8=none
+              fi
+            fi
+          fi
+          ;;
+      esac
+    else
+      gt_cv_locale_tr_utf8=none
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_tr_utf8" >&5
+printf "%s\n" "$gt_cv_locale_tr_utf8" >&6; }
+  LOCALE_TR_UTF8=$gt_cv_locale_tr_utf8
+
+
+
+  if test "$ac_cv_header_winsock2_h" = yes; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS connect.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_CONNECT" != 1; then
+        if test "$GL_GNULIB_CONNECT" = 0; then
+      GL_GNULIB_CONNECT=$gl_module_indicator_condition
+    else
+      GL_GNULIB_CONNECT="($GL_GNULIB_CONNECT || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_CONNECT 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_ENVIRON" != 1; then
+        if test "$GL_GNULIB_ENVIRON" = 0; then
+      GL_GNULIB_ENVIRON=$gl_module_indicator_condition
+    else
+      GL_GNULIB_ENVIRON="($GL_GNULIB_ENVIRON || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_ENVIRON 1" >>confdefs.h
+
+
+
+
+
+
+
+    if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+      REPLACE_FDOPEN=1
+    fi
+
+  if test $REPLACE_FDOPEN = 0; then
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether fdopen sets errno" >&5
+printf %s "checking whether fdopen sets errno... " >&6; }
+if test ${gl_cv_func_fdopen_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+        if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+             mingw*) gl_cv_func_fdopen_works="guessing no" ;;
+             *)      gl_cv_func_fdopen_works="guessing yes" ;;
+           esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdio.h>
+#include <errno.h>
+
+
+$gl_mda_defines
+
+int
+main (void)
+{
+  FILE *fp;
+  errno = 0;
+  fp = fdopen (-1, "r");
+  if (fp == NULL && errno == 0)
+    return 1;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_fdopen_works=yes
+else $as_nop
+  gl_cv_func_fdopen_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_fdopen_works" >&5
+printf "%s\n" "$gl_cv_func_fdopen_works" >&6; }
+    case "$gl_cv_func_fdopen_works" in
+      *no) REPLACE_FDOPEN=1 ;;
+    esac
+  fi
+
+  if test $REPLACE_FDOPEN = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS fdopen.$ac_objext"
+
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_FDOPEN" != 1; then
+        if test "$GL_GNULIB_FDOPEN" = 0; then
+      GL_GNULIB_FDOPEN=$gl_module_indicator_condition
+    else
+      GL_GNULIB_FDOPEN="($GL_GNULIB_FDOPEN || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FDOPEN 1" >>confdefs.h
+
+
+
+
+
+
+  FLOAT_H=
+  REPLACE_FLOAT_LDBL=0
+  case "$host_os" in
+    aix* | beos* | openbsd* | mirbsd* | irix*)
+      FLOAT_H=float.h
+      ;;
+    freebsd* | dragonfly*)
+      case "$host_cpu" in
+        i[34567]86 )
+          FLOAT_H=float.h
+          ;;
+        x86_64 )
+          # On x86_64 systems, the C compiler may still be generating
+          # 32-bit code.
+          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __LP64__ || defined __x86_64__ || defined __amd64__
+                  int ok;
+                 #else
+                  error fail
+                 #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+
+else $as_nop
+  FLOAT_H=float.h
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+          ;;
+      esac
+      ;;
+    linux*)
+      case "$host_cpu" in
+        powerpc*)
+          FLOAT_H=float.h
+          ;;
+      esac
+      ;;
+  esac
+  case "$host_os" in
+    aix* | freebsd* | dragonfly* | linux*)
+      if test -n "$FLOAT_H"; then
+        REPLACE_FLOAT_LDBL=1
+      fi
+      ;;
+  esac
+
+    REPLACE_ITOLD=0
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether conversion from 'int' to 'long double' works" >&5
+printf %s "checking whether conversion from 'int' to 'long double' works... " >&6; }
+if test ${gl_cv_func_itold_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      if test "$cross_compiling" = yes
+then :
+  case "$host" in
+           sparc*-*-linux*)
+             cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __LP64__ || defined __arch64__
+                    int ok;
+                   #else
+                    error fail
+                   #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_func_itold_works="guessing no"
+else $as_nop
+  gl_cv_func_itold_works="guessing yes"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+             ;;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_itold_works="guessing yes" ;;
+           *)      gl_cv_func_itold_works="guessing yes" ;;
+         esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int i = -1;
+volatile long double ld;
+int main ()
+{
+  ld += i * 1.0L;
+  if (ld > 0)
+    return 1;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_itold_works=yes
+else $as_nop
+  gl_cv_func_itold_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_itold_works" >&5
+printf "%s\n" "$gl_cv_func_itold_works" >&6; }
+  case "$gl_cv_func_itold_works" in
+    *no)
+      REPLACE_ITOLD=1
+                  FLOAT_H=float.h
+      ;;
+  esac
+
+  if test -n "$FLOAT_H"; then
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_float_h='<'float.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <float.h>" >&5
+printf %s "checking absolute name of <float.h>... " >&6; }
+if test ${gl_cv_next_float_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <float.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'float.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_float_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_float_h
+           gl_cv_next_float_h='"'$gl_header'"'
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_float_h" >&5
+printf "%s\n" "$gl_cv_next_float_h" >&6; }
+     fi
+     NEXT_FLOAT_H=$gl_cv_next_float_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'float.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_float_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_FLOAT_H=$gl_next_as_first_directive
+
+
+
+
+  fi
+
+   if test -n "$FLOAT_H"; then
+  GL_GENERATE_FLOAT_H_TRUE=
+  GL_GENERATE_FLOAT_H_FALSE='#'
+else
+  GL_GENERATE_FLOAT_H_TRUE='#'
+  GL_GENERATE_FLOAT_H_FALSE=
+fi
+
+
+
+  if test $REPLACE_FLOAT_LDBL = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS float.$ac_objext"
+
+  fi
+  if test $REPLACE_ITOLD = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS itold.$ac_objext"
+
+  fi
+
+
+
+  if test $ac_cv_func_ftruncate = yes; then
+
+
+      case "$host_os" in
+        mingw*)
+                                                                      REPLACE_FTRUNCATE=1
+          ;;
+      esac
+
+  else
+    HAVE_FTRUNCATE=0
+  fi
+
+  if test $HAVE_FTRUNCATE = 0 || test $REPLACE_FTRUNCATE = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS ftruncate.$ac_objext"
+
+
+  ac_fn_c_check_func "$LINENO" "_chsize" "ac_cv_func__chsize"
+if test "x$ac_cv_func__chsize" = xyes
+then :
+  printf "%s\n" "#define HAVE__CHSIZE 1" >>confdefs.h
+
+fi
+
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_FTRUNCATE" != 1; then
+        if test "$GL_GNULIB_FTRUNCATE" = 0; then
+      GL_GNULIB_FTRUNCATE=$gl_module_indicator_condition
+    else
+      GL_GNULIB_FTRUNCATE="($GL_GNULIB_FTRUNCATE || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_FTRUNCATE 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+  gl_gettimeofday_timezone=void
+  if test $ac_cv_func_gettimeofday != yes; then
+    HAVE_GETTIMEOFDAY=0
+  else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for gettimeofday with POSIX signature" >&5
+printf %s "checking for gettimeofday with POSIX signature... " >&6; }
+if test ${gl_cv_func_gettimeofday_posix_signature+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/time.h>
+              struct timeval c;
+              int gettimeofday (struct timeval *restrict, void *restrict);
+
+int
+main (void)
+{
+/* glibc uses struct timezone * rather than the POSIX void *
+                 if _GNU_SOURCE is defined.  However, since the only portable
+                 use of gettimeofday uses NULL as the second parameter, and
+                 since the glibc definition is actually more typesafe, it is
+                 not worth wrapping this to get a compliant signature.  */
+              int (*f) (struct timeval *restrict, void *restrict)
+                = gettimeofday;
+              int x = f (&c, 0);
+              return !(x | c.tv_sec | c.tv_usec);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_func_gettimeofday_posix_signature=yes
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/time.h>
+int gettimeofday (struct timeval *restrict, struct timezone *restrict);
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_func_gettimeofday_posix_signature=almost
+else $as_nop
+  gl_cv_func_gettimeofday_posix_signature=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_gettimeofday_posix_signature" >&5
+printf "%s\n" "$gl_cv_func_gettimeofday_posix_signature" >&6; }
+    if test $gl_cv_func_gettimeofday_posix_signature = almost; then
+      gl_gettimeofday_timezone='struct timezone'
+    elif test $gl_cv_func_gettimeofday_posix_signature != yes; then
+      REPLACE_GETTIMEOFDAY=1
+    fi
+        if test $REPLACE_STRUCT_TIMEVAL = 1; then
+      REPLACE_GETTIMEOFDAY=1
+    fi
+            case "$host_os" in
+      mingw*) REPLACE_GETTIMEOFDAY=1 ;;
+    esac
+  fi
+
+printf "%s\n" "#define GETTIMEOFDAY_TIMEZONE $gl_gettimeofday_timezone" >>confdefs.h
+
+
+  if test $HAVE_GETTIMEOFDAY = 0 || test $REPLACE_GETTIMEOFDAY = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS gettimeofday.$ac_objext"
+
+    :
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_GETTIMEOFDAY" != 1; then
+        if test "$GL_GNULIB_GETTIMEOFDAY" = 0; then
+      GL_GNULIB_GETTIMEOFDAY=$gl_module_indicator_condition
+    else
+      GL_GNULIB_GETTIMEOFDAY="($GL_GNULIB_GETTIMEOFDAY || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_GETTIMEOFDAY 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+                HAVE_INET_PTON=1
+  INET_PTON_LIB=
+
+
+
+
+  if test $ac_cv_header_sys_socket_h != yes; then
+                    ac_fn_c_check_header_compile "$LINENO" "winsock2.h" "ac_cv_header_winsock2_h" "$ac_includes_default"
+if test "x$ac_cv_header_winsock2_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_WINSOCK2_H 1" >>confdefs.h
+
+fi
+
+  fi
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    HAVE_WINSOCK2_H=1
+    UNISTD_H_HAVE_WINSOCK2_H=1
+    SYS_IOCTL_H_HAVE_WINSOCK2_H=1
+  else
+    HAVE_WINSOCK2_H=0
+  fi
+
+
+  if test $HAVE_WINSOCK2_H = 1; then
+                    REPLACE_INET_PTON=1
+    ac_fn_check_decl "$LINENO" "inet_pton" "ac_cv_have_decl_inet_pton" "#include <ws2tcpip.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_inet_pton" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_INET_PTON $ac_have_decl" >>confdefs.h
+
+    if test $ac_cv_have_decl_inet_pton = yes; then
+      INET_PTON_LIB="-lws2_32"
+    else
+      HAVE_DECL_INET_PTON=0
+    fi
+  else
+    gl_save_LIBS=$LIBS
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing inet_pton" >&5
+printf %s "checking for library containing inet_pton... " >&6; }
+if test ${ac_cv_search_inet_pton+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char inet_pton ();
+int
+main (void)
+{
+return inet_pton ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' nsl resolv network
+do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_search_inet_pton=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext
+  if test ${ac_cv_search_inet_pton+y}
+then :
+  break
+fi
+done
+if test ${ac_cv_search_inet_pton+y}
+then :
+
+else $as_nop
+  ac_cv_search_inet_pton=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_inet_pton" >&5
+printf "%s\n" "$ac_cv_search_inet_pton" >&6; }
+ac_res=$ac_cv_search_inet_pton
+if test "$ac_res" != no
+then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+else $as_nop
+  ac_fn_c_check_func "$LINENO" "inet_pton" "ac_cv_func_inet_pton"
+if test "x$ac_cv_func_inet_pton" = xyes
+then :
+  printf "%s\n" "#define HAVE_INET_PTON 1" >>confdefs.h
+
+fi
+
+       if test $ac_cv_func_inet_pton = no; then
+         HAVE_INET_PTON=0
+       fi
+
+fi
+
+    LIBS=$gl_save_LIBS
+
+    if test "$ac_cv_search_inet_pton" != "no" \
+       && test "$ac_cv_search_inet_pton" != "none required"; then
+      INET_PTON_LIB="$ac_cv_search_inet_pton"
+    fi
+
+
+    ac_fn_check_decl "$LINENO" "inet_pton" "ac_cv_have_decl_inet_pton" "#include <arpa/inet.h>
+        #if HAVE_NETDB_H
+        # include <netdb.h>
+        #endif
+
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_inet_pton" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_INET_PTON $ac_have_decl" >>confdefs.h
+
+    if test $ac_cv_have_decl_inet_pton = no; then
+      HAVE_DECL_INET_PTON=0
+    fi
+  fi
+
+
+  if test $HAVE_INET_PTON = 0 || test $REPLACE_INET_PTON = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS inet_pton.$ac_objext"
+
+
+
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_INET_PTON" != 1; then
+        if test "$GL_GNULIB_INET_PTON" = 0; then
+      GL_GNULIB_INET_PTON=$gl_module_indicator_condition
+    else
+      GL_GNULIB_INET_PTON="($GL_GNULIB_INET_PTON || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether byte ordering is bigendian" >&5
+printf %s "checking whether byte ordering is bigendian... " >&6; }
+if test ${ac_cv_c_bigendian+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_c_bigendian=unknown
+    # See if we're dealing with a universal compiler.
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifndef __APPLE_CC__
+	       not a universal capable compiler
+	     #endif
+	     typedef int dummy;
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+
+	# Check for potential -arch flags.  It is not universal unless
+	# there are at least two -arch flags with different values.
+	ac_arch=
+	ac_prev=
+	for ac_word in $CC $CFLAGS $CPPFLAGS $LDFLAGS; do
+	 if test -n "$ac_prev"; then
+	   case $ac_word in
+	     i?86 | x86_64 | ppc | ppc64)
+	       if test -z "$ac_arch" || test "$ac_arch" = "$ac_word"; then
+		 ac_arch=$ac_word
+	       else
+		 ac_cv_c_bigendian=universal
+		 break
+	       fi
+	       ;;
+	   esac
+	   ac_prev=
+	 elif test "x$ac_word" = "x-arch"; then
+	   ac_prev=arch
+	 fi
+       done
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+    if test $ac_cv_c_bigendian = unknown; then
+      # See if sys/param.h defines the BYTE_ORDER macro.
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+	     #include <sys/param.h>
+
+int
+main (void)
+{
+#if ! (defined BYTE_ORDER && defined BIG_ENDIAN \
+		     && defined LITTLE_ENDIAN && BYTE_ORDER && BIG_ENDIAN \
+		     && LITTLE_ENDIAN)
+	      bogus endian macros
+	     #endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  # It does; now see whether it defined to BIG_ENDIAN or not.
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+		#include <sys/param.h>
+
+int
+main (void)
+{
+#if BYTE_ORDER != BIG_ENDIAN
+		 not big endian
+		#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_c_bigendian=yes
+else $as_nop
+  ac_cv_c_bigendian=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+    fi
+    if test $ac_cv_c_bigendian = unknown; then
+      # See if <limits.h> defines _LITTLE_ENDIAN or _BIG_ENDIAN (e.g., Solaris).
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <limits.h>
+
+int
+main (void)
+{
+#if ! (defined _LITTLE_ENDIAN || defined _BIG_ENDIAN)
+	      bogus endian macros
+	     #endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  # It does; now see whether it defined to _BIG_ENDIAN or not.
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <limits.h>
+
+int
+main (void)
+{
+#ifndef _BIG_ENDIAN
+		 not big endian
+		#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_c_bigendian=yes
+else $as_nop
+  ac_cv_c_bigendian=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+    fi
+    if test $ac_cv_c_bigendian = unknown; then
+      # Compile a test program.
+      if test "$cross_compiling" = yes
+then :
+  # Try to guess by grepping values from an object file.
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+unsigned short int ascii_mm[] =
+		  { 0x4249, 0x4765, 0x6E44, 0x6961, 0x6E53, 0x7953, 0 };
+		unsigned short int ascii_ii[] =
+		  { 0x694C, 0x5454, 0x656C, 0x6E45, 0x6944, 0x6E61, 0 };
+		int use_ascii (int i) {
+		  return ascii_mm[i] + ascii_ii[i];
+		}
+		unsigned short int ebcdic_ii[] =
+		  { 0x89D3, 0xE3E3, 0x8593, 0x95C5, 0x89C4, 0x9581, 0 };
+		unsigned short int ebcdic_mm[] =
+		  { 0xC2C9, 0xC785, 0x95C4, 0x8981, 0x95E2, 0xA8E2, 0 };
+		int use_ebcdic (int i) {
+		  return ebcdic_mm[i] + ebcdic_ii[i];
+		}
+		extern int foo;
+
+int
+main (void)
+{
+return use_ascii (foo) == use_ebcdic (foo);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  if grep BIGenDianSyS conftest.$ac_objext >/dev/null; then
+	      ac_cv_c_bigendian=yes
+	    fi
+	    if grep LiTTleEnDian conftest.$ac_objext >/dev/null ; then
+	      if test "$ac_cv_c_bigendian" = unknown; then
+		ac_cv_c_bigendian=no
+	      else
+		# finding both strings is unlikely to happen, but who knows?
+		ac_cv_c_bigendian=unknown
+	      fi
+	    fi
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+int
+main (void)
+{
+
+	     /* Are we little or big endian?  From Harbison&Steele.  */
+	     union
+	     {
+	       long int l;
+	       char c[sizeof (long int)];
+	     } u;
+	     u.l = 1;
+	     return u.c[sizeof (long int) - 1] == 1;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  ac_cv_c_bigendian=no
+else $as_nop
+  ac_cv_c_bigendian=yes
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+    fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_bigendian" >&5
+printf "%s\n" "$ac_cv_c_bigendian" >&6; }
+ case $ac_cv_c_bigendian in #(
+   yes)
+     printf "%s\n" "#define WORDS_BIGENDIAN 1" >>confdefs.h
+;; #(
+   no)
+      ;; #(
+   universal)
+
+printf "%s\n" "#define AC_APPLE_UNIVERSAL_BUILD 1" >>confdefs.h
+
+     ;; #(
+   *)
+     as_fn_error $? "unknown endianness
+ presetting ac_cv_c_bigendian=no (or yes) will help" "$LINENO" 5 ;;
+ esac
+
+
+
+
+  :
+
+  :
+  :
+  :
+  :
+
+
+
+
+  HAVE_IOCTL=1
+  if test "$ac_cv_header_winsock2_h" = yes; then
+                HAVE_IOCTL=0
+  else
+    ac_fn_c_check_func "$LINENO" "ioctl" "ac_cv_func_ioctl"
+if test "x$ac_cv_func_ioctl" = xyes
+then :
+  printf "%s\n" "#define HAVE_IOCTL 1" >>confdefs.h
+
+fi
+
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ioctl with POSIX signature" >&5
+printf %s "checking for ioctl with POSIX signature... " >&6; }
+if test ${gl_cv_func_ioctl_posix_signature+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/ioctl.h>
+              /* On some platforms, ioctl() is declared in <unistd.h>.  */
+              #include <unistd.h>
+
+int
+main (void)
+{
+extern
+              #ifdef __cplusplus
+              "C"
+              #endif
+              int ioctl (int, int, ...);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_func_ioctl_posix_signature=yes
+else $as_nop
+  gl_cv_func_ioctl_posix_signature=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_ioctl_posix_signature" >&5
+printf "%s\n" "$gl_cv_func_ioctl_posix_signature" >&6; }
+    if test $gl_cv_func_ioctl_posix_signature != yes; then
+      REPLACE_IOCTL=1
+    fi
+  fi
+
+  if test $HAVE_IOCTL = 0 || test $REPLACE_IOCTL = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS ioctl.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_IOCTL" != 1; then
+        if test "$GL_GNULIB_IOCTL" = 0; then
+      GL_GNULIB_IOCTL=$gl_module_indicator_condition
+    else
+      GL_GNULIB_IOCTL="($GL_GNULIB_IOCTL || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_IOCTL 1" >>confdefs.h
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a traditional french locale" >&5
+printf %s "checking for a traditional french locale... " >&6; }
+if test ${gt_cv_locale_fr+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is only
+     one byte long. This excludes the UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 3 || buf[2] != 'v') return 1;
+# if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+# endif
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the native Windows locale name.
+          if (LC_ALL=French_France.1252 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=French_France.1252
+          else
+            # None found.
+            gt_cv_locale_fr=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.ISO-8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr=fr_FR.ISO-8859-1
+            else
+              # Test for the AIX, OSF/1, FreeBSD, NetBSD, OpenBSD locale name.
+              if (LC_ALL=fr_FR.ISO8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr=fr_FR.ISO8859-1
+              else
+                # Test for the HP-UX locale name.
+                if (LC_ALL=fr_FR.iso88591 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_fr=fr_FR.iso88591
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=fr LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_fr=fr
+                  else
+                    # None found.
+                    gt_cv_locale_fr=none
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr" >&5
+printf "%s\n" "$gt_cv_locale_fr" >&6; }
+  LOCALE_FR=$gt_cv_locale_fr
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a french Unicode locale" >&5
+printf %s "checking for a french Unicode locale... " >&6; }
+if test ${gt_cv_locale_fr_utf8+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if !(defined __BEOS__ || defined __HAIKU__)
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is
+     two bytes long, with UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 4
+      || buf[1] != (char) 0xc3 || buf[2] != (char) 0xa9 || buf[3] != 'v')
+    return 1;
+#endif
+#if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+#endif
+  return 0;
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=French_France.65001 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=French_France.65001
+          else
+            # None found.
+            gt_cv_locale_fr_utf8=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr_utf8=fr_FR.UTF-8
+            else
+              # Test for the Solaris 7 locale name.
+              if (LC_ALL=fr.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr_utf8=fr.UTF-8
+              else
+                # None found.
+                gt_cv_locale_fr_utf8=none
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr_utf8" >&5
+printf "%s\n" "$gt_cv_locale_fr_utf8" >&6; }
+  LOCALE_FR_UTF8=$gt_cv_locale_fr_utf8
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a traditional japanese locale" >&5
+printf %s "checking for a traditional japanese locale... " >&6; }
+if test ${gt_cv_locale_ja+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether MB_CUR_MAX is > 1.  This excludes the dysfunctional locales
+     on Cygwin 1.5.x.  */
+  if (MB_CUR_MAX == 1)
+    return 1;
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding (except on MirBSD).  */
+  {
+    const char *p;
+    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+    for (p = buf; *p != '\0'; p++)
+      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+        return 1;
+  }
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Note that on native Windows, the Japanese locale is
+          # Japanese_Japan.932, and CP932 is very different from EUC-JP, so we
+          # cannot use it here.
+          gt_cv_locale_ja=none
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the AIX locale name.
+          if (LC_ALL=ja_JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_ja=ja_JP
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=ja_JP.EUC-JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_ja=ja_JP.EUC-JP
+            else
+              # Test for the HP-UX, OSF/1, NetBSD locale name.
+              if (LC_ALL=ja_JP.eucJP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_ja=ja_JP.eucJP
+              else
+                # Test for the IRIX, FreeBSD locale name.
+                if (LC_ALL=ja_JP.EUC LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_ja=ja_JP.EUC
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=ja LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_ja=ja
+                  else
+                    # Special test for NetBSD 1.6.
+                    if test -f /usr/share/locale/ja_JP.eucJP/LC_CTYPE; then
+                      gt_cv_locale_ja=ja_JP.eucJP
+                    else
+                      # None found.
+                      gt_cv_locale_ja=none
+                    fi
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_ja" >&5
+printf "%s\n" "$gt_cv_locale_ja" >&6; }
+  LOCALE_JA=$gt_cv_locale_ja
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a transitional chinese locale" >&5
+printf %s "checking for a transitional chinese locale... " >&6; }
+if test ${gt_cv_locale_zh_CN+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding (except on MirBSD).  */
+  {
+    const char *p;
+    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+    for (p = buf; *p != '\0'; p++)
+      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+        return 1;
+  }
+  /* Check whether a typical GB18030 multibyte sequence is recognized as a
+     single wide character.  This excludes the GB2312 and GBK encodings.  */
+  if (mblen ("\203\062\332\066", 5) != 4)
+    return 1;
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=Chinese_China.54936 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=Chinese_China.54936
+          else
+            # None found.
+            gt_cv_locale_zh_CN=none
+          fi
+          ;;
+        solaris2.8)
+          # On Solaris 8, the locales zh_CN.GB18030, zh_CN.GBK, zh.GBK are
+          # broken. One witness is the test case in gl_MBRTOWC_SANITYCHECK.
+          # Another witness is that "LC_ALL=zh_CN.GB18030 bash -c true" dumps core.
+          gt_cv_locale_zh_CN=none
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the locale name without encoding suffix.
+          if (LC_ALL=zh_CN LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=zh_CN
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=zh_CN.GB18030 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_zh_CN=zh_CN.GB18030
+            else
+              # None found.
+              gt_cv_locale_zh_CN=none
+            fi
+          fi
+          ;;
+      esac
+    else
+      # If there was a link error, due to mblen(), the system is so old that
+      # it certainly doesn't have a chinese locale.
+      gt_cv_locale_zh_CN=none
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_zh_CN" >&5
+printf "%s\n" "$gt_cv_locale_zh_CN" >&6; }
+  LOCALE_ZH_CN=$gt_cv_locale_zh_CN
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a traditional french locale" >&5
+printf %s "checking for a traditional french locale... " >&6; }
+if test ${gt_cv_locale_fr+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is only
+     one byte long. This excludes the UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 3 || buf[2] != 'v') return 1;
+# if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+# endif
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the native Windows locale name.
+          if (LC_ALL=French_France.1252 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=French_France.1252
+          else
+            # None found.
+            gt_cv_locale_fr=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.ISO-8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr=fr_FR.ISO-8859-1
+            else
+              # Test for the AIX, OSF/1, FreeBSD, NetBSD, OpenBSD locale name.
+              if (LC_ALL=fr_FR.ISO8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr=fr_FR.ISO8859-1
+              else
+                # Test for the HP-UX locale name.
+                if (LC_ALL=fr_FR.iso88591 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_fr=fr_FR.iso88591
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=fr LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_fr=fr
+                  else
+                    # None found.
+                    gt_cv_locale_fr=none
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr" >&5
+printf "%s\n" "$gt_cv_locale_fr" >&6; }
+  LOCALE_FR=$gt_cv_locale_fr
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a french Unicode locale" >&5
+printf %s "checking for a french Unicode locale... " >&6; }
+if test ${gt_cv_locale_fr_utf8+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if !(defined __BEOS__ || defined __HAIKU__)
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is
+     two bytes long, with UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 4
+      || buf[1] != (char) 0xc3 || buf[2] != (char) 0xa9 || buf[3] != 'v')
+    return 1;
+#endif
+#if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+#endif
+  return 0;
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=French_France.65001 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=French_France.65001
+          else
+            # None found.
+            gt_cv_locale_fr_utf8=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr_utf8=fr_FR.UTF-8
+            else
+              # Test for the Solaris 7 locale name.
+              if (LC_ALL=fr.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr_utf8=fr.UTF-8
+              else
+                # None found.
+                gt_cv_locale_fr_utf8=none
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr_utf8" >&5
+printf "%s\n" "$gt_cv_locale_fr_utf8" >&6; }
+  LOCALE_FR_UTF8=$gt_cv_locale_fr_utf8
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a traditional japanese locale" >&5
+printf %s "checking for a traditional japanese locale... " >&6; }
+if test ${gt_cv_locale_ja+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether MB_CUR_MAX is > 1.  This excludes the dysfunctional locales
+     on Cygwin 1.5.x.  */
+  if (MB_CUR_MAX == 1)
+    return 1;
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding (except on MirBSD).  */
+  {
+    const char *p;
+    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+    for (p = buf; *p != '\0'; p++)
+      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+        return 1;
+  }
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Note that on native Windows, the Japanese locale is
+          # Japanese_Japan.932, and CP932 is very different from EUC-JP, so we
+          # cannot use it here.
+          gt_cv_locale_ja=none
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the AIX locale name.
+          if (LC_ALL=ja_JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_ja=ja_JP
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=ja_JP.EUC-JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_ja=ja_JP.EUC-JP
+            else
+              # Test for the HP-UX, OSF/1, NetBSD locale name.
+              if (LC_ALL=ja_JP.eucJP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_ja=ja_JP.eucJP
+              else
+                # Test for the IRIX, FreeBSD locale name.
+                if (LC_ALL=ja_JP.EUC LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_ja=ja_JP.EUC
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=ja LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_ja=ja
+                  else
+                    # Special test for NetBSD 1.6.
+                    if test -f /usr/share/locale/ja_JP.eucJP/LC_CTYPE; then
+                      gt_cv_locale_ja=ja_JP.eucJP
+                    else
+                      # None found.
+                      gt_cv_locale_ja=none
+                    fi
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_ja" >&5
+printf "%s\n" "$gt_cv_locale_ja" >&6; }
+  LOCALE_JA=$gt_cv_locale_ja
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a transitional chinese locale" >&5
+printf %s "checking for a transitional chinese locale... " >&6; }
+if test ${gt_cv_locale_zh_CN+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding (except on MirBSD).  */
+  {
+    const char *p;
+    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+    for (p = buf; *p != '\0'; p++)
+      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+        return 1;
+  }
+  /* Check whether a typical GB18030 multibyte sequence is recognized as a
+     single wide character.  This excludes the GB2312 and GBK encodings.  */
+  if (mblen ("\203\062\332\066", 5) != 4)
+    return 1;
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=Chinese_China.54936 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=Chinese_China.54936
+          else
+            # None found.
+            gt_cv_locale_zh_CN=none
+          fi
+          ;;
+        solaris2.8)
+          # On Solaris 8, the locales zh_CN.GB18030, zh_CN.GBK, zh.GBK are
+          # broken. One witness is the test case in gl_MBRTOWC_SANITYCHECK.
+          # Another witness is that "LC_ALL=zh_CN.GB18030 bash -c true" dumps core.
+          gt_cv_locale_zh_CN=none
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the locale name without encoding suffix.
+          if (LC_ALL=zh_CN LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=zh_CN
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=zh_CN.GB18030 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_zh_CN=zh_CN.GB18030
+            else
+              # None found.
+              gt_cv_locale_zh_CN=none
+            fi
+          fi
+          ;;
+      esac
+    else
+      # If there was a link error, due to mblen(), the system is so old that
+      # it certainly doesn't have a chinese locale.
+      gt_cv_locale_zh_CN=none
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_zh_CN" >&5
+printf "%s\n" "$gt_cv_locale_zh_CN" >&6; }
+  LOCALE_ZH_CN=$gt_cv_locale_zh_CN
+
+
+
+  if test "$ac_cv_header_winsock2_h" = yes; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS listen.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_LISTEN" != 1; then
+        if test "$GL_GNULIB_LISTEN" = 0; then
+      GL_GNULIB_LISTEN=$gl_module_indicator_condition
+    else
+      GL_GNULIB_LISTEN="($GL_GNULIB_LISTEN || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_LISTEN 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+  if test $HAVE_LOCALE_T = 1; then
+
+    gl_func_newlocale="$ac_cv_func_newlocale"
+    gl_func_duplocale="$ac_cv_func_duplocale"
+    gl_func_freelocale="$ac_cv_func_freelocale"
+  else
+            gl_func_newlocale=no
+    gl_func_duplocale=no
+    gl_func_freelocale=no
+  fi
+  if test $gl_func_newlocale != yes; then
+    HAVE_NEWLOCALE=0
+  fi
+  if test $gl_func_duplocale != yes; then
+    HAVE_DUPLOCALE=0
+  fi
+  if test $gl_func_freelocale != yes; then
+    HAVE_FREELOCALE=0
+  fi
+  if test $gt_localename_enhances_locale_funcs = yes; then
+    REPLACE_NEWLOCALE=1
+    REPLACE_DUPLOCALE=1
+    REPLACE_FREELOCALE=1
+  fi
+
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_LOCALENAME" != 1; then
+        if test "$GL_GNULIB_LOCALENAME" = 0; then
+      GL_GNULIB_LOCALENAME=$gl_module_indicator_condition
+    else
+      GL_GNULIB_LOCALENAME="($GL_GNULIB_LOCALENAME || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_LOCALENAME 1" >>confdefs.h
+
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a turkish Unicode locale" >&5
+printf %s "checking for a turkish Unicode locale... " >&6; }
+if test ${gt_cv_locale_tr_utf8+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+#include <wctype.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  But BeOS does not
+     implement the Turkish upper-/lowercase mappings.  Therefore, let this
+     program return 1 on BeOS.  */
+  /* Check whether the given locale name is recognized by the system.  */
+#if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+#else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+#endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the tr_TR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+#if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+#endif
+#ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+#endif
+  /* Check whether in the abbreviation of the eighth month, the second
+     character (should be U+011F: LATIN SMALL LETTER G WITH BREVE) is
+     two bytes long, with UTF-8 encoding.  */
+  t.tm_year = 1992 - 1900; t.tm_mon = 8 - 1; t.tm_mday = 19;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 4
+      || buf[1] != (char) 0xc4 || buf[2] != (char) 0x9f)
+    return 1;
+  /* Check whether the upper-/lowercase mappings are as expected for
+     Turkish.  */
+  if (towupper ('i') != 0x0130 || towlower (0x0130) != 'i'
+      || towupper(0x0131) != 'I' || towlower ('I') != 0x0131)
+    return 1;
+  return 0;
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=Turkish_Turkey.65001 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_tr_utf8=Turkish_Turkey.65001
+          else
+            # None found.
+            gt_cv_locale_tr_utf8=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=tr_TR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_tr_utf8=tr_TR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=tr_TR.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_tr_utf8=tr_TR.UTF-8
+            else
+              # Test for the Solaris 7 locale name.
+              if (LC_ALL=tr.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_tr_utf8=tr.UTF-8
+              else
+                # None found.
+                gt_cv_locale_tr_utf8=none
+              fi
+            fi
+          fi
+          ;;
+      esac
+    else
+      gt_cv_locale_tr_utf8=none
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_tr_utf8" >&5
+printf "%s\n" "$gt_cv_locale_tr_utf8" >&6; }
+  LOCALE_TR_UTF8=$gt_cv_locale_tr_utf8
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a french Unicode locale" >&5
+printf %s "checking for a french Unicode locale... " >&6; }
+if test ${gt_cv_locale_fr_utf8+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if !(defined __BEOS__ || defined __HAIKU__)
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is
+     two bytes long, with UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 4
+      || buf[1] != (char) 0xc3 || buf[2] != (char) 0xa9 || buf[3] != 'v')
+    return 1;
+#endif
+#if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+#endif
+  return 0;
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=French_France.65001 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=French_France.65001
+          else
+            # None found.
+            gt_cv_locale_fr_utf8=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr_utf8=fr_FR.UTF-8
+            else
+              # Test for the Solaris 7 locale name.
+              if (LC_ALL=fr.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr_utf8=fr.UTF-8
+              else
+                # None found.
+                gt_cv_locale_fr_utf8=none
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr_utf8" >&5
+printf "%s\n" "$gt_cv_locale_fr_utf8" >&6; }
+  LOCALE_FR_UTF8=$gt_cv_locale_fr_utf8
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a traditional french locale" >&5
+printf %s "checking for a traditional french locale... " >&6; }
+if test ${gt_cv_locale_fr+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is only
+     one byte long. This excludes the UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 3 || buf[2] != 'v') return 1;
+# if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+# endif
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the native Windows locale name.
+          if (LC_ALL=French_France.1252 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=French_France.1252
+          else
+            # None found.
+            gt_cv_locale_fr=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.ISO-8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr=fr_FR.ISO-8859-1
+            else
+              # Test for the AIX, OSF/1, FreeBSD, NetBSD, OpenBSD locale name.
+              if (LC_ALL=fr_FR.ISO8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr=fr_FR.ISO8859-1
+              else
+                # Test for the HP-UX locale name.
+                if (LC_ALL=fr_FR.iso88591 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_fr=fr_FR.iso88591
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=fr LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_fr=fr
+                  else
+                    # None found.
+                    gt_cv_locale_fr=none
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr" >&5
+printf "%s\n" "$gt_cv_locale_fr" >&6; }
+  LOCALE_FR=$gt_cv_locale_fr
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a french Unicode locale" >&5
+printf %s "checking for a french Unicode locale... " >&6; }
+if test ${gt_cv_locale_fr_utf8+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if !(defined __BEOS__ || defined __HAIKU__)
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is
+     two bytes long, with UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 4
+      || buf[1] != (char) 0xc3 || buf[2] != (char) 0xa9 || buf[3] != 'v')
+    return 1;
+#endif
+#if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+#endif
+  return 0;
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=French_France.65001 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=French_France.65001
+          else
+            # None found.
+            gt_cv_locale_fr_utf8=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr_utf8=fr_FR.UTF-8
+            else
+              # Test for the Solaris 7 locale name.
+              if (LC_ALL=fr.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr_utf8=fr.UTF-8
+              else
+                # None found.
+                gt_cv_locale_fr_utf8=none
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr_utf8" >&5
+printf "%s\n" "$gt_cv_locale_fr_utf8" >&6; }
+  LOCALE_FR_UTF8=$gt_cv_locale_fr_utf8
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a traditional japanese locale" >&5
+printf %s "checking for a traditional japanese locale... " >&6; }
+if test ${gt_cv_locale_ja+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether MB_CUR_MAX is > 1.  This excludes the dysfunctional locales
+     on Cygwin 1.5.x.  */
+  if (MB_CUR_MAX == 1)
+    return 1;
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding (except on MirBSD).  */
+  {
+    const char *p;
+    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+    for (p = buf; *p != '\0'; p++)
+      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+        return 1;
+  }
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Note that on native Windows, the Japanese locale is
+          # Japanese_Japan.932, and CP932 is very different from EUC-JP, so we
+          # cannot use it here.
+          gt_cv_locale_ja=none
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the AIX locale name.
+          if (LC_ALL=ja_JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_ja=ja_JP
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=ja_JP.EUC-JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_ja=ja_JP.EUC-JP
+            else
+              # Test for the HP-UX, OSF/1, NetBSD locale name.
+              if (LC_ALL=ja_JP.eucJP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_ja=ja_JP.eucJP
+              else
+                # Test for the IRIX, FreeBSD locale name.
+                if (LC_ALL=ja_JP.EUC LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_ja=ja_JP.EUC
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=ja LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_ja=ja
+                  else
+                    # Special test for NetBSD 1.6.
+                    if test -f /usr/share/locale/ja_JP.eucJP/LC_CTYPE; then
+                      gt_cv_locale_ja=ja_JP.eucJP
+                    else
+                      # None found.
+                      gt_cv_locale_ja=none
+                    fi
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_ja" >&5
+printf "%s\n" "$gt_cv_locale_ja" >&6; }
+  LOCALE_JA=$gt_cv_locale_ja
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a transitional chinese locale" >&5
+printf %s "checking for a transitional chinese locale... " >&6; }
+if test ${gt_cv_locale_zh_CN+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding (except on MirBSD).  */
+  {
+    const char *p;
+    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+    for (p = buf; *p != '\0'; p++)
+      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+        return 1;
+  }
+  /* Check whether a typical GB18030 multibyte sequence is recognized as a
+     single wide character.  This excludes the GB2312 and GBK encodings.  */
+  if (mblen ("\203\062\332\066", 5) != 4)
+    return 1;
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=Chinese_China.54936 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=Chinese_China.54936
+          else
+            # None found.
+            gt_cv_locale_zh_CN=none
+          fi
+          ;;
+        solaris2.8)
+          # On Solaris 8, the locales zh_CN.GB18030, zh_CN.GBK, zh.GBK are
+          # broken. One witness is the test case in gl_MBRTOWC_SANITYCHECK.
+          # Another witness is that "LC_ALL=zh_CN.GB18030 bash -c true" dumps core.
+          gt_cv_locale_zh_CN=none
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the locale name without encoding suffix.
+          if (LC_ALL=zh_CN LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=zh_CN
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=zh_CN.GB18030 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_zh_CN=zh_CN.GB18030
+            else
+              # None found.
+              gt_cv_locale_zh_CN=none
+            fi
+          fi
+          ;;
+      esac
+    else
+      # If there was a link error, due to mblen(), the system is so old that
+      # it certainly doesn't have a chinese locale.
+      gt_cv_locale_zh_CN=none
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_zh_CN" >&5
+printf "%s\n" "$gt_cv_locale_zh_CN" >&6; }
+  LOCALE_ZH_CN=$gt_cv_locale_zh_CN
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a french Unicode locale" >&5
+printf %s "checking for a french Unicode locale... " >&6; }
+if test ${gt_cv_locale_fr_utf8+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if !(defined __BEOS__ || defined __HAIKU__)
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is
+     two bytes long, with UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 4
+      || buf[1] != (char) 0xc3 || buf[2] != (char) 0xa9 || buf[3] != 'v')
+    return 1;
+#endif
+#if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+#endif
+  return 0;
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=French_France.65001 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=French_France.65001
+          else
+            # None found.
+            gt_cv_locale_fr_utf8=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr_utf8=fr_FR.UTF-8
+            else
+              # Test for the Solaris 7 locale name.
+              if (LC_ALL=fr.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr_utf8=fr.UTF-8
+              else
+                # None found.
+                gt_cv_locale_fr_utf8=none
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr_utf8" >&5
+printf "%s\n" "$gt_cv_locale_fr_utf8" >&6; }
+  LOCALE_FR_UTF8=$gt_cv_locale_fr_utf8
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a transitional chinese locale" >&5
+printf %s "checking for a transitional chinese locale... " >&6; }
+if test ${gt_cv_locale_zh_CN+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding (except on MirBSD).  */
+  {
+    const char *p;
+    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+    for (p = buf; *p != '\0'; p++)
+      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+        return 1;
+  }
+  /* Check whether a typical GB18030 multibyte sequence is recognized as a
+     single wide character.  This excludes the GB2312 and GBK encodings.  */
+  if (mblen ("\203\062\332\066", 5) != 4)
+    return 1;
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=Chinese_China.54936 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=Chinese_China.54936
+          else
+            # None found.
+            gt_cv_locale_zh_CN=none
+          fi
+          ;;
+        solaris2.8)
+          # On Solaris 8, the locales zh_CN.GB18030, zh_CN.GBK, zh.GBK are
+          # broken. One witness is the test case in gl_MBRTOWC_SANITYCHECK.
+          # Another witness is that "LC_ALL=zh_CN.GB18030 bash -c true" dumps core.
+          gt_cv_locale_zh_CN=none
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the locale name without encoding suffix.
+          if (LC_ALL=zh_CN LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=zh_CN
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=zh_CN.GB18030 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_zh_CN=zh_CN.GB18030
+            else
+              # None found.
+              gt_cv_locale_zh_CN=none
+            fi
+          fi
+          ;;
+      esac
+    else
+      # If there was a link error, due to mblen(), the system is so old that
+      # it certainly doesn't have a chinese locale.
+      gt_cv_locale_zh_CN=none
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_zh_CN" >&5
+printf "%s\n" "$gt_cv_locale_zh_CN" >&6; }
+  LOCALE_ZH_CN=$gt_cv_locale_zh_CN
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ nanosleep_save_libs=$LIBS
+
+ # Solaris 2.5.1 needs -lposix4 to get the nanosleep function.
+ # Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.
+ LIB_NANOSLEEP=
+
+ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing nanosleep" >&5
+printf %s "checking for library containing nanosleep... " >&6; }
+if test ${ac_cv_search_nanosleep+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char nanosleep ();
+int
+main (void)
+{
+return nanosleep ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' rt posix4
+do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_search_nanosleep=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext
+  if test ${ac_cv_search_nanosleep+y}
+then :
+  break
+fi
+done
+if test ${ac_cv_search_nanosleep+y}
+then :
+
+else $as_nop
+  ac_cv_search_nanosleep=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_nanosleep" >&5
+printf "%s\n" "$ac_cv_search_nanosleep" >&6; }
+ac_res=$ac_cv_search_nanosleep
+if test "$ac_res" != no
+then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+  test "$ac_cv_search_nanosleep" = "none required" ||
+                 LIB_NANOSLEEP=$ac_cv_search_nanosleep
+fi
+
+ if test "x$ac_cv_search_nanosleep" != xno; then
+
+
+   if test $APPLE_UNIVERSAL_BUILD = 1; then
+     # A universal build on Apple Mac OS X platforms.
+     # The test result would be 'no (mishandles large arguments)' in 64-bit
+     # mode but 'yes' in 32-bit mode. But we need a configuration result that
+     # is valid in both modes.
+     gl_cv_func_nanosleep='no (mishandles large arguments)'
+   fi
+
+   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working nanosleep" >&5
+printf %s "checking for working nanosleep... " >&6; }
+if test ${gl_cv_func_nanosleep+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+     if test "$cross_compiling" = yes
+then :
+  case "$host_os" in           linux*) # Guess it halfway works when the kernel is Linux.
+            gl_cv_func_nanosleep='guessing no (mishandles large arguments)' ;;
+          mingw*) # Guess no on native Windows.
+            gl_cv_func_nanosleep='guessing no' ;;
+          *)      # If we don't know, obey --enable-cross-guesses.
+            gl_cv_func_nanosleep="$gl_cross_guess_normal" ;;
+        esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+          #include <errno.h>
+          #include <limits.h>
+          #include <signal.h>
+          #if HAVE_SYS_TIME_H
+           #include <sys/time.h>
+          #endif
+          #include <time.h>
+          #include <unistd.h>
+          #define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
+          #define TYPE_MAXIMUM(t) \
+            ((t) (! TYPE_SIGNED (t) \
+                  ? (t) -1 \
+                  : ((((t) 1 << (sizeof (t) * CHAR_BIT - 2)) - 1) * 2 + 1)))
+
+          #if HAVE_DECL_ALARM
+          static void
+          check_for_SIGALRM (int sig)
+          {
+            if (sig != SIGALRM)
+              _exit (1);
+          }
+          #endif
+
+          int
+          main ()
+          {
+            static struct timespec ts_sleep;
+            static struct timespec ts_remaining;
+            /* Test for major problems first.  */
+            if (! nanosleep)
+              return 2;
+            ts_sleep.tv_sec = 0;
+            ts_sleep.tv_nsec = 1;
+            #if HAVE_DECL_ALARM
+            {
+              static struct sigaction act;
+              act.sa_handler = check_for_SIGALRM;
+              sigemptyset (&act.sa_mask);
+              sigaction (SIGALRM, &act, NULL);
+              alarm (1);
+              if (nanosleep (&ts_sleep, NULL) != 0)
+                return 3;
+              /* Test for a minor problem: the handling of large arguments.  */
+              ts_sleep.tv_sec = TYPE_MAXIMUM (time_t);
+              ts_sleep.tv_nsec = 999999999;
+              alarm (1);
+              if (nanosleep (&ts_sleep, &ts_remaining) != -1)
+                return 4;
+              if (errno != EINTR)
+                return 5;
+              if (ts_remaining.tv_sec <= TYPE_MAXIMUM (time_t) - 10)
+                return 6;
+            }
+            #else /* A simpler test for native Windows.  */
+            if (nanosleep (&ts_sleep, &ts_remaining) < 0)
+              return 3;
+            #endif
+            return 0;
+          }
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_nanosleep=yes
+else $as_nop
+  case $? in         4|5|6) gl_cv_func_nanosleep='no (mishandles large arguments)';;         *)   gl_cv_func_nanosleep=no;;
+        esac
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_nanosleep" >&5
+printf "%s\n" "$gl_cv_func_nanosleep" >&6; }
+   case "$gl_cv_func_nanosleep" in
+     *yes)
+       REPLACE_NANOSLEEP=0
+       ;;
+     *)
+       REPLACE_NANOSLEEP=1
+       case "$gl_cv_func_nanosleep" in
+         *"mishandles large arguments"*)
+
+printf "%s\n" "#define HAVE_BUG_BIG_NANOSLEEP 1" >>confdefs.h
+
+           ;;
+         *)
+           # The replacement uses select(). Add $LIBSOCKET to $LIB_NANOSLEEP.
+           for ac_lib in $LIBSOCKET; do
+             case " $LIB_NANOSLEEP " in
+               *" $ac_lib "*) ;;
+               *) LIB_NANOSLEEP="$LIB_NANOSLEEP $ac_lib";;
+             esac
+           done
+           ;;
+       esac
+       ;;
+   esac
+ else
+   HAVE_NANOSLEEP=0
+ fi
+ LIBS=$nanosleep_save_libs
+
+  if test $HAVE_NANOSLEEP = 0 || test $REPLACE_NANOSLEEP = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS nanosleep.$ac_objext"
+
+
+
+  :
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_NANOSLEEP" != 1; then
+        if test "$GL_GNULIB_NANOSLEEP" = 0; then
+      GL_GNULIB_NANOSLEEP=$gl_module_indicator_condition
+    else
+      GL_GNULIB_NANOSLEEP="($GL_GNULIB_NANOSLEEP || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_NANOSLEEP 1" >>confdefs.h
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether <netinet/in.h> is self-contained" >&5
+printf %s "checking whether <netinet/in.h> is self-contained... " >&6; }
+if test ${gl_cv_header_netinet_in_h_selfcontained+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <netinet/in.h>
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_netinet_in_h_selfcontained=yes
+else $as_nop
+  gl_cv_header_netinet_in_h_selfcontained=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_netinet_in_h_selfcontained" >&5
+printf "%s\n" "$gl_cv_header_netinet_in_h_selfcontained" >&6; }
+  if test $gl_cv_header_netinet_in_h_selfcontained = yes; then
+    NETINET_IN_H=''
+  else
+    NETINET_IN_H='netinet/in.h'
+    ac_fn_c_check_header_compile "$LINENO" "netinet/in.h" "ac_cv_header_netinet_in_h" "$ac_includes_default"
+if test "x$ac_cv_header_netinet_in_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_NETINET_IN_H 1" >>confdefs.h
+
+fi
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_netinet_in_h='<'netinet/in.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <netinet/in.h>" >&5
+printf %s "checking absolute name of <netinet/in.h>... " >&6; }
+if test ${gl_cv_next_netinet_in_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_netinet_in_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <netinet/in.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'netinet/in.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_netinet_in_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+           gl_header=$gl_cv_absolute_netinet_in_h
+           gl_cv_next_netinet_in_h='"'$gl_header'"'
+          else
+               gl_cv_next_netinet_in_h='<'netinet/in.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_netinet_in_h" >&5
+printf "%s\n" "$gl_cv_next_netinet_in_h" >&6; }
+     fi
+     NEXT_NETINET_IN_H=$gl_cv_next_netinet_in_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'netinet/in.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_netinet_in_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_NETINET_IN_H=$gl_next_as_first_directive
+
+
+
+
+    if test $ac_cv_header_netinet_in_h = yes; then
+      HAVE_NETINET_IN_H=1
+    else
+      HAVE_NETINET_IN_H=0
+    fi
+
+  fi
+
+   if test -n "$NETINET_IN_H"; then
+  GL_GENERATE_NETINET_IN_H_TRUE=
+  GL_GENERATE_NETINET_IN_H_FALSE='#'
+else
+  GL_GENERATE_NETINET_IN_H_TRUE='#'
+  GL_GENERATE_NETINET_IN_H_FALSE=
+fi
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a traditional french locale" >&5
+printf %s "checking for a traditional french locale... " >&6; }
+if test ${gt_cv_locale_fr+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is only
+     one byte long. This excludes the UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 3 || buf[2] != 'v') return 1;
+# if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+# endif
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the native Windows locale name.
+          if (LC_ALL=French_France.1252 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=French_France.1252
+          else
+            # None found.
+            gt_cv_locale_fr=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.ISO-8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr=fr_FR.ISO-8859-1
+            else
+              # Test for the AIX, OSF/1, FreeBSD, NetBSD, OpenBSD locale name.
+              if (LC_ALL=fr_FR.ISO8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr=fr_FR.ISO8859-1
+              else
+                # Test for the HP-UX locale name.
+                if (LC_ALL=fr_FR.iso88591 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_fr=fr_FR.iso88591
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=fr LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_fr=fr
+                  else
+                    # None found.
+                    gt_cv_locale_fr=none
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr" >&5
+printf "%s\n" "$gt_cv_locale_fr" >&6; }
+  LOCALE_FR=$gt_cv_locale_fr
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a french Unicode locale" >&5
+printf %s "checking for a french Unicode locale... " >&6; }
+if test ${gt_cv_locale_fr_utf8+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if !(defined __BEOS__ || defined __HAIKU__)
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is
+     two bytes long, with UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 4
+      || buf[1] != (char) 0xc3 || buf[2] != (char) 0xa9 || buf[3] != 'v')
+    return 1;
+#endif
+#if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+#endif
+  return 0;
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=French_France.65001 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=French_France.65001
+          else
+            # None found.
+            gt_cv_locale_fr_utf8=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr_utf8=fr_FR.UTF-8
+            else
+              # Test for the Solaris 7 locale name.
+              if (LC_ALL=fr.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr_utf8=fr.UTF-8
+              else
+                # None found.
+                gt_cv_locale_fr_utf8=none
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr_utf8" >&5
+printf "%s\n" "$gt_cv_locale_fr_utf8" >&6; }
+  LOCALE_FR_UTF8=$gt_cv_locale_fr_utf8
+
+
+
+
+
+
+
+             if test "$ERRNO_H:$REPLACE_STRERROR_0" != :0; then
+            REPLACE_PERROR=1
+  fi
+  case ${gl_cv_func_strerror_r_works-unset} in
+    unset|*yes)
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether perror matches strerror" >&5
+printf %s "checking whether perror matches strerror... " >&6; }
+if test ${gl_cv_func_perror_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                       # Guess yes on musl systems.
+              *-musl*) gl_cv_func_perror_works="guessing yes" ;;
+                       # Guess yes on native Windows.
+              mingw*)  gl_cv_func_perror_works="guessing yes" ;;
+                       # Otherwise obey --enable-cross-guesses.
+              *)       gl_cv_func_perror_works="$gl_cross_guess_normal" ;;
+            esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <errno.h>
+                #include <stdio.h>
+                #include <stdlib.h>
+                #include <string.h>
+
+int
+main (void)
+{
+char *str = strerror (-1);
+                if (!getenv("CONFTEST_OUTPUT")) return 0;
+                if (!str) str = "";
+                puts (str);
+                errno = -1;
+                perror ("");
+                return 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  if CONFTEST_OUTPUT=1 ./conftest$EXEEXT >conftest.txt1 2>conftest.txt2 \
+               && cmp conftest.txt1 conftest.txt2 >/dev/null; then
+              gl_cv_func_perror_works=yes
+            else
+              gl_cv_func_perror_works=no
+            fi
+            rm -rf conftest.txt1 conftest.txt2
+else $as_nop
+  gl_cv_func_perror_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_perror_works" >&5
+printf "%s\n" "$gl_cv_func_perror_works" >&6; }
+      case "$gl_cv_func_perror_works" in
+        *yes) ;;
+        *) REPLACE_PERROR=1 ;;
+      esac
+      ;;
+    *)
+                  REPLACE_PERROR=1
+      ;;
+  esac
+
+  if test $REPLACE_PERROR = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS perror.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_PERROR" != 1; then
+        if test "$GL_GNULIB_PERROR" = 0; then
+      GL_GNULIB_PERROR=$gl_module_indicator_condition
+    else
+      GL_GNULIB_PERROR="($GL_GNULIB_PERROR || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_PERROR 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+
+  if { case "$host_os" in mingw*) true;; *) false;; esac; } \
+     && test $gl_threads_api = windows; then
+            REPLACE_PTHREAD_CREATE=1
+    REPLACE_PTHREAD_ATTR_INIT=1
+    REPLACE_PTHREAD_ATTR_GETDETACHSTATE=1
+    REPLACE_PTHREAD_ATTR_SETDETACHSTATE=1
+    REPLACE_PTHREAD_ATTR_DESTROY=1
+    REPLACE_PTHREAD_SELF=1
+    REPLACE_PTHREAD_EQUAL=1
+    REPLACE_PTHREAD_DETACH=1
+    REPLACE_PTHREAD_JOIN=1
+    REPLACE_PTHREAD_EXIT=1
+  else
+    if test $HAVE_PTHREAD_H = 0; then
+      HAVE_PTHREAD_CREATE=0
+      HAVE_PTHREAD_ATTR_INIT=0
+      HAVE_PTHREAD_ATTR_GETDETACHSTATE=0
+      HAVE_PTHREAD_ATTR_SETDETACHSTATE=0
+      HAVE_PTHREAD_ATTR_DESTROY=0
+      HAVE_PTHREAD_SELF=0
+      HAVE_PTHREAD_EQUAL=0
+      HAVE_PTHREAD_DETACH=0
+      HAVE_PTHREAD_JOIN=0
+      HAVE_PTHREAD_EXIT=0
+    else
+                  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether pthread_create exists as a global function" >&5
+printf %s "checking whether pthread_create exists as a global function... " >&6; }
+if test ${gl_cv_func_pthread_create+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  saved_LIBS="$LIBS"
+         LIBS="$LIBS $LIBPMULTITHREAD"
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+extern
+                #ifdef __cplusplus
+                "C"
+                #endif
+                int pthread_create (void);
+                int main ()
+                {
+                  return pthread_create ();
+                }
+
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_func_pthread_create=yes
+else $as_nop
+  gl_cv_func_pthread_create=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+         LIBS="$saved_LIBS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_pthread_create" >&5
+printf "%s\n" "$gl_cv_func_pthread_create" >&6; }
+      if test $gl_cv_func_pthread_create = no; then
+        REPLACE_PTHREAD_CREATE=1
+        REPLACE_PTHREAD_ATTR_INIT=1
+
+printf "%s\n" "#define PTHREAD_CREATE_IS_INLINE 1" >>confdefs.h
+
+      fi
+    fi
+  fi
+
+  if test $HAVE_PTHREAD_CREATE = 0 || test $REPLACE_PTHREAD_CREATE = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS pthread-thread.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_PTHREAD_THREAD" != 1; then
+        if test "$GL_GNULIB_PTHREAD_THREAD" = 0; then
+      GL_GNULIB_PTHREAD_THREAD=$gl_module_indicator_condition
+    else
+      GL_GNULIB_PTHREAD_THREAD="($GL_GNULIB_PTHREAD_THREAD || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_PTHREAD_THREAD 1" >>confdefs.h
+
+
+
+
+
+
+
+
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether pthread_sigmask is a macro" >&5
+printf %s "checking whether pthread_sigmask is a macro... " >&6; }
+if test ${gl_cv_func_pthread_sigmask_macro+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <pthread.h>
+#include <signal.h>
+#ifdef pthread_sigmask
+ headers_define_pthread_sigmask
+#endif
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "headers_define_pthread_sigmask" >/dev/null 2>&1
+then :
+  gl_cv_func_pthread_sigmask_macro=yes
+else $as_nop
+  gl_cv_func_pthread_sigmask_macro=no
+fi
+rm -rf conftest*
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_pthread_sigmask_macro" >&5
+printf "%s\n" "$gl_cv_func_pthread_sigmask_macro" >&6; }
+
+  LIB_PTHREAD_SIGMASK=
+
+  if test $gl_cv_func_pthread_sigmask_macro = yes; then
+        HAVE_PTHREAD_SIGMASK=0
+        REPLACE_PTHREAD_SIGMASK=1
+  else
+
+
+
+      if test "$gl_threads_api" = posix; then
+        if test $ac_cv_func_pthread_sigmask = yes; then
+                    :
+        else
+          if test -n "$LIBMULTITHREAD"; then
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pthread_sigmask in $LIBMULTITHREAD" >&5
+printf %s "checking for pthread_sigmask in $LIBMULTITHREAD... " >&6; }
+if test ${gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_save_LIBS="$LIBS"
+               LIBS="$LIBS $LIBMULTITHREAD"
+               cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pthread.h>
+                      #include <signal.h>
+
+int
+main (void)
+{
+return pthread_sigmask (0, (sigset_t *) 0, (sigset_t *) 0);
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD=yes
+else $as_nop
+  gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+               LIBS="$gl_save_LIBS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD" >&5
+printf "%s\n" "$gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD" >&6; }
+            if test $gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD = yes; then
+                            LIB_PTHREAD_SIGMASK="$LIBMULTITHREAD"
+            else
+                            HAVE_PTHREAD_SIGMASK=0
+            fi
+          else
+                        HAVE_PTHREAD_SIGMASK=0
+          fi
+        fi
+      else
+                        if test $ac_cv_func_pthread_sigmask = yes; then
+          REPLACE_PTHREAD_SIGMASK=1
+        else
+          HAVE_PTHREAD_SIGMASK=0
+        fi
+      fi
+
+  fi
+
+
+
+    if test $HAVE_PTHREAD_SIGMASK = 1; then
+
+
+                if test -z "$LIB_PTHREAD_SIGMASK"; then
+      case " $LIBS " in
+        *' -pthread '*) ;;
+        *' -lpthread '*) ;;
+        *)
+          { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether pthread_sigmask works without -lpthread" >&5
+printf %s "checking whether pthread_sigmask works without -lpthread... " >&6; }
+if test ${gl_cv_func_pthread_sigmask_in_libc_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+              if test "$cross_compiling" = yes
+then :
+
+                                  case "$host_os" in
+                   freebsd* | midnightbsd* | hpux* | solaris | solaris2.[2-9]*)
+                     gl_cv_func_pthread_sigmask_in_libc_works="guessing no";;
+                   *)
+                     gl_cv_func_pthread_sigmask_in_libc_works="guessing yes";;
+                 esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+                   #include <pthread.h>
+                   #include <signal.h>
+                   #include <stddef.h>
+                   int main ()
+                   {
+                     sigset_t set;
+                     sigemptyset (&set);
+                     return pthread_sigmask (1729, &set, NULL) != 0;
+                   }
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_pthread_sigmask_in_libc_works=no
+else $as_nop
+  gl_cv_func_pthread_sigmask_in_libc_works=yes
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_pthread_sigmask_in_libc_works" >&5
+printf "%s\n" "$gl_cv_func_pthread_sigmask_in_libc_works" >&6; }
+          case "$gl_cv_func_pthread_sigmask_in_libc_works" in
+            *no)
+              REPLACE_PTHREAD_SIGMASK=1
+
+printf "%s\n" "#define PTHREAD_SIGMASK_INEFFECTIVE 1" >>confdefs.h
+
+              ;;
+          esac;;
+      esac
+    fi
+
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether pthread_sigmask returns error numbers" >&5
+printf %s "checking whether pthread_sigmask returns error numbers... " >&6; }
+if test ${gl_cv_func_pthread_sigmask_return_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+        gl_save_LIBS="$LIBS"
+        LIBS="$LIBS $LIB_PTHREAD_SIGMASK"
+        if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+             cygwin*)
+               gl_cv_func_pthread_sigmask_return_works="guessing no";;
+             *)
+               gl_cv_func_pthread_sigmask_return_works="guessing yes";;
+           esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <pthread.h>
+#include <signal.h>
+#include <stddef.h>
+int main ()
+{
+  sigset_t set;
+  sigemptyset (&set);
+  if (pthread_sigmask (1729, &set, NULL) == -1)
+    return 1;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_pthread_sigmask_return_works=yes
+else $as_nop
+  gl_cv_func_pthread_sigmask_return_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+        LIBS="$gl_save_LIBS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_pthread_sigmask_return_works" >&5
+printf "%s\n" "$gl_cv_func_pthread_sigmask_return_works" >&6; }
+    case "$gl_cv_func_pthread_sigmask_return_works" in
+      *no)
+        REPLACE_PTHREAD_SIGMASK=1
+
+printf "%s\n" "#define PTHREAD_SIGMASK_FAILS_WITH_ERRNO 1" >>confdefs.h
+
+        ;;
+    esac
+
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether pthread_sigmask unblocks signals correctly" >&5
+printf %s "checking whether pthread_sigmask unblocks signals correctly... " >&6; }
+if test ${gl_cv_func_pthread_sigmask_unblock_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+        case "$host_os" in
+          irix*)
+            gl_cv_func_pthread_sigmask_unblock_works="guessing no";;
+          *)
+            gl_cv_func_pthread_sigmask_unblock_works="guessing yes";;
+        esac
+                                         gl_save_LIBS=$LIBS
+           LIBS="$LIBS $LIBMULTITHREAD"
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+
+$gl_mda_defines
+
+static volatile int sigint_occurred;
+static void
+sigint_handler (int sig)
+{
+  sigint_occurred++;
+}
+int main ()
+{
+  sigset_t set;
+  int pid = getpid ();
+  char command[80];
+  signal (SIGINT, sigint_handler);
+  sigemptyset (&set);
+  sigaddset (&set, SIGINT);
+  if (!(pthread_sigmask (SIG_BLOCK, &set, NULL) == 0))
+    return 1;
+  sprintf (command, "sh -c 'sleep 1; kill -%d %d' &", SIGINT, pid);
+  if (!(system (command) == 0))
+    return 2;
+  sleep (2);
+  if (!(sigint_occurred == 0))
+    return 3;
+  if (!(pthread_sigmask (SIG_UNBLOCK, &set, NULL) == 0))
+    return 4;
+  if (!(sigint_occurred == 1)) /* This fails on IRIX.  */
+    return 5;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  :
+else $as_nop
+  gl_cv_func_pthread_sigmask_unblock_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+        LIBS=$gl_save_LIBS
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_pthread_sigmask_unblock_works" >&5
+printf "%s\n" "$gl_cv_func_pthread_sigmask_unblock_works" >&6; }
+    case "$gl_cv_func_pthread_sigmask_unblock_works" in
+      *no)
+        REPLACE_PTHREAD_SIGMASK=1
+
+printf "%s\n" "#define PTHREAD_SIGMASK_UNBLOCK_BUG 1" >>confdefs.h
+
+        ;;
+    esac
+  fi
+
+  if test $HAVE_PTHREAD_SIGMASK = 0 || test $REPLACE_PTHREAD_SIGMASK = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS pthread_sigmask.$ac_objext"
+
+
+  if test $HAVE_PTHREAD_SIGMASK = 1; then
+
+printf "%s\n" "#define HAVE_PTHREAD_SIGMASK 1" >>confdefs.h
+
+  fi
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_PTHREAD_SIGMASK" != 1; then
+        if test "$GL_GNULIB_PTHREAD_SIGMASK" = 0; then
+      GL_GNULIB_PTHREAD_SIGMASK=$gl_module_indicator_condition
+    else
+      GL_GNULIB_PTHREAD_SIGMASK="($GL_GNULIB_PTHREAD_SIGMASK || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_PTHREAD_SIGMASK 1" >>confdefs.h
+
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for putenv compatible with GNU and SVID" >&5
+printf %s "checking for putenv compatible with GNU and SVID... " >&6; }
+if test ${gl_cv_func_svid_putenv+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+          case "$host_os" in
+                         # Guess yes on glibc systems.
+          *-gnu* | gnu*) gl_cv_func_svid_putenv="guessing yes" ;;
+                         # Guess yes on musl systems.
+          *-musl*)       gl_cv_func_svid_putenv="guessing yes" ;;
+                         # Guess no on native Windows.
+          mingw*)        gl_cv_func_svid_putenv="guessing no" ;;
+                         # If we don't know, obey --enable-cross-guesses.
+          *)             gl_cv_func_svid_putenv="$gl_cross_guess_normal" ;;
+        esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+
+
+$gl_mda_defines
+
+int
+main (void)
+{
+
+            /* Put it in env.  */
+            if (putenv ("CONFTEST_putenv=val"))
+              return 1;
+
+            /* Try to remove it.  */
+            if (putenv ("CONFTEST_putenv"))
+              return 2;
+
+            /* Make sure it was deleted.  */
+            if (getenv ("CONFTEST_putenv") != 0)
+              return 3;
+
+            return 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_svid_putenv=yes
+else $as_nop
+  gl_cv_func_svid_putenv=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_svid_putenv" >&5
+printf "%s\n" "$gl_cv_func_svid_putenv" >&6; }
+  case "$gl_cv_func_svid_putenv" in
+    *yes) ;;
+    *)
+      REPLACE_PUTENV=1
+      ;;
+  esac
+
+  if test $REPLACE_PUTENV = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS putenv.$ac_objext"
+
+
+  ac_fn_check_decl "$LINENO" "_putenv" "ac_cv_have_decl__putenv" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl__putenv" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL__PUTENV $ac_have_decl" >>confdefs.h
+
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_PUTENV" != 1; then
+        if test "$GL_GNULIB_PUTENV" = 0; then
+      GL_GNULIB_PUTENV=$gl_module_indicator_condition
+    else
+      GL_GNULIB_PUTENV="($GL_GNULIB_PUTENV || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_PUTENV 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    REPLACE_SELECT=1
+  else
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether select supports a 0 argument" >&5
+printf %s "checking whether select supports a 0 argument... " >&6; }
+if test ${gl_cv_func_select_supports0+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+        if test "$cross_compiling" = yes
+then :
+
+           case "$host_os" in
+                       # Guess no on Interix.
+             interix*) gl_cv_func_select_supports0="guessing no";;
+                       # Guess yes otherwise.
+             *)        gl_cv_func_select_supports0="guessing yes";;
+           esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#if HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+int main ()
+{
+  struct timeval timeout;
+  timeout.tv_sec = 0;
+  timeout.tv_usec = 5;
+  return select (0, (fd_set *)0, (fd_set *)0, (fd_set *)0, &timeout) < 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_select_supports0=yes
+else $as_nop
+  gl_cv_func_select_supports0=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_select_supports0" >&5
+printf "%s\n" "$gl_cv_func_select_supports0" >&6; }
+    case "$gl_cv_func_select_supports0" in
+      *yes) ;;
+      *) REPLACE_SELECT=1 ;;
+    esac
+
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether select detects invalid fds" >&5
+printf %s "checking whether select detects invalid fds... " >&6; }
+if test ${gl_cv_func_select_detects_ebadf+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+        if test "$cross_compiling" = yes
+then :
+
+           case "$host_os" in
+                             # Guess yes on Linux systems.
+            linux-* | linux) gl_cv_func_select_detects_ebadf="guessing yes" ;;
+                             # Guess yes on glibc systems.
+            *-gnu* | gnu*)   gl_cv_func_select_detects_ebadf="guessing yes" ;;
+                             # If we don't know, obey --enable-cross-guesses.
+            *)               gl_cv_func_select_detects_ebadf="$gl_cross_guess_normal" ;;
+           esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#if HAVE_SYS_SELECT_H
+# include <sys/select.h>
+#endif
+#include <unistd.h>
+#include <errno.h>
+
+
+$gl_mda_defines
+
+int
+main (void)
+{
+
+  fd_set set;
+  dup2(0, 16);
+  FD_ZERO(&set);
+  FD_SET(16, &set);
+  close(16);
+  struct timeval timeout;
+  timeout.tv_sec = 0;
+  timeout.tv_usec = 5;
+  return select (17, &set, NULL, NULL, &timeout) != -1 || errno != EBADF;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_select_detects_ebadf=yes
+else $as_nop
+  gl_cv_func_select_detects_ebadf=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_select_detects_ebadf" >&5
+printf "%s\n" "$gl_cv_func_select_detects_ebadf" >&6; }
+    case $gl_cv_func_select_detects_ebadf in
+      *yes) ;;
+      *) REPLACE_SELECT=1 ;;
+    esac
+  fi
+
+    LIB_SELECT="$LIBSOCKET"
+  if test $REPLACE_SELECT = 1; then
+    case "$host_os" in
+      mingw*)
+                                cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+int
+main ()
+{
+  MsgWaitForMultipleObjects (0, NULL, 0, 0, 0);
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+
+else $as_nop
+  LIB_SELECT="$LIB_SELECT -luser32"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+        ;;
+    esac
+  fi
+
+
+  if test $REPLACE_SELECT = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS select.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_SELECT" != 1; then
+        if test "$GL_GNULIB_SELECT" = 0; then
+      GL_GNULIB_SELECT=$gl_module_indicator_condition
+    else
+      GL_GNULIB_SELECT="($GL_GNULIB_SELECT || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_SELECT 1" >>confdefs.h
+
+
+
+
+
+
+     if test $ac_cv_func_setenv = no; then
+    HAVE_SETENV=0
+  else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether setenv validates arguments" >&5
+printf %s "checking whether setenv validates arguments... " >&6; }
+if test ${gl_cv_func_setenv_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                        # Guess yes on glibc systems.
+         *-gnu* | gnu*) gl_cv_func_setenv_works="guessing yes" ;;
+                        # Guess yes on musl systems.
+         *-musl*)       gl_cv_func_setenv_works="guessing yes" ;;
+                        # If we don't know, obey --enable-cross-guesses.
+         *)             gl_cv_func_setenv_works="$gl_cross_guess_normal" ;;
+       esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+       #include <stdlib.h>
+       #include <errno.h>
+       #include <string.h>
+
+int
+main (void)
+{
+
+       int result = 0;
+       {
+         if (setenv ("", "", 0) != -1)
+           result |= 1;
+         else if (errno != EINVAL)
+           result |= 2;
+       }
+       {
+         if (setenv ("a", "=", 1) != 0)
+           result |= 4;
+         else if (strcmp (getenv ("a"), "=") != 0)
+           result |= 8;
+       }
+       return result;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_setenv_works=yes
+else $as_nop
+  gl_cv_func_setenv_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_setenv_works" >&5
+printf "%s\n" "$gl_cv_func_setenv_works" >&6; }
+    case "$gl_cv_func_setenv_works" in
+      *yes) ;;
+      *)
+        REPLACE_SETENV=1
+        ;;
+    esac
+  fi
+
+  if test $HAVE_SETENV = 0 || test $REPLACE_SETENV = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS setenv.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_SETENV" != 1; then
+        if test "$GL_GNULIB_SETENV" = 0; then
+      GL_GNULIB_SETENV=$gl_module_indicator_condition
+    else
+      GL_GNULIB_SETENV="($GL_GNULIB_SETENV || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_SETENV 1" >>confdefs.h
+
+
+
+
+
+
+
+
+    NEED_SETLOCALE_IMPROVED=0
+  case "$host_os" in
+            mingw*) NEED_SETLOCALE_IMPROVED=1 ;;
+            cygwin*)
+      case `uname -r` in
+        1.5.*) NEED_SETLOCALE_IMPROVED=1 ;;
+      esac
+      ;;
+        *)
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether setlocale supports the C locale" >&5
+printf %s "checking whether setlocale supports the C locale... " >&6; }
+if test ${gl_cv_func_setlocale_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                               # Guess no on Android.
+              linux*-android*) gl_cv_func_setlocale_works="guessing no";;
+                               # Guess yes otherwise.
+              *)               gl_cv_func_setlocale_works="guessing yes";;
+            esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+int main ()
+{
+  return setlocale (LC_ALL, "C") == NULL;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_setlocale_works=yes
+else $as_nop
+  gl_cv_func_setlocale_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_setlocale_works" >&5
+printf "%s\n" "$gl_cv_func_setlocale_works" >&6; }
+      case "$gl_cv_func_setlocale_works" in
+        *yes) ;;
+        *) NEED_SETLOCALE_IMPROVED=1 ;;
+      esac
+      ;;
+  esac
+
+printf "%s\n" "#define NEED_SETLOCALE_IMPROVED $NEED_SETLOCALE_IMPROVED" >>confdefs.h
+
+
+    NEED_SETLOCALE_MTSAFE=0
+  if test $SETLOCALE_NULL_ALL_MTSAFE = 0 || test $SETLOCALE_NULL_ONE_MTSAFE = 0; then
+    NEED_SETLOCALE_MTSAFE=1
+  fi
+
+printf "%s\n" "#define NEED_SETLOCALE_MTSAFE $NEED_SETLOCALE_MTSAFE" >>confdefs.h
+
+
+  if test $NEED_SETLOCALE_IMPROVED = 1 || test $NEED_SETLOCALE_MTSAFE = 1; then
+    REPLACE_SETLOCALE=1
+  fi
+
+  if test $NEED_SETLOCALE_MTSAFE = 1; then
+    LIB_SETLOCALE="$LIB_SETLOCALE_NULL"
+  else
+    LIB_SETLOCALE=
+  fi
+
+
+  if test $REPLACE_SETLOCALE = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS setlocale.$ac_objext"
+
+
+        :
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_SETLOCALE" != 1; then
+        if test "$GL_GNULIB_SETLOCALE" = 0; then
+      GL_GNULIB_SETLOCALE=$gl_module_indicator_condition
+    else
+      GL_GNULIB_SETLOCALE="($GL_GNULIB_SETLOCALE || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_SETLOCALE 1" >>confdefs.h
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a traditional french locale" >&5
+printf %s "checking for a traditional french locale... " >&6; }
+if test ${gt_cv_locale_fr+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is only
+     one byte long. This excludes the UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 3 || buf[2] != 'v') return 1;
+# if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+# endif
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the native Windows locale name.
+          if (LC_ALL=French_France.1252 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=French_France.1252
+          else
+            # None found.
+            gt_cv_locale_fr=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.ISO-8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr=fr_FR.ISO-8859-1
+            else
+              # Test for the AIX, OSF/1, FreeBSD, NetBSD, OpenBSD locale name.
+              if (LC_ALL=fr_FR.ISO8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr=fr_FR.ISO8859-1
+              else
+                # Test for the HP-UX locale name.
+                if (LC_ALL=fr_FR.iso88591 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_fr=fr_FR.iso88591
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=fr LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_fr=fr
+                  else
+                    # None found.
+                    gt_cv_locale_fr=none
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr" >&5
+printf "%s\n" "$gt_cv_locale_fr" >&6; }
+  LOCALE_FR=$gt_cv_locale_fr
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a french Unicode locale" >&5
+printf %s "checking for a french Unicode locale... " >&6; }
+if test ${gt_cv_locale_fr_utf8+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if !(defined __BEOS__ || defined __HAIKU__)
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is
+     two bytes long, with UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 4
+      || buf[1] != (char) 0xc3 || buf[2] != (char) 0xa9 || buf[3] != 'v')
+    return 1;
+#endif
+#if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+#endif
+  return 0;
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=French_France.65001 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=French_France.65001
+          else
+            # None found.
+            gt_cv_locale_fr_utf8=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr_utf8=fr_FR.UTF-8
+            else
+              # Test for the Solaris 7 locale name.
+              if (LC_ALL=fr.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr_utf8=fr.UTF-8
+              else
+                # None found.
+                gt_cv_locale_fr_utf8=none
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr_utf8" >&5
+printf "%s\n" "$gt_cv_locale_fr_utf8" >&6; }
+  LOCALE_FR_UTF8=$gt_cv_locale_fr_utf8
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a traditional japanese locale" >&5
+printf %s "checking for a traditional japanese locale... " >&6; }
+if test ${gt_cv_locale_ja+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether MB_CUR_MAX is > 1.  This excludes the dysfunctional locales
+     on Cygwin 1.5.x.  */
+  if (MB_CUR_MAX == 1)
+    return 1;
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding (except on MirBSD).  */
+  {
+    const char *p;
+    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+    for (p = buf; *p != '\0'; p++)
+      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+        return 1;
+  }
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Note that on native Windows, the Japanese locale is
+          # Japanese_Japan.932, and CP932 is very different from EUC-JP, so we
+          # cannot use it here.
+          gt_cv_locale_ja=none
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the AIX locale name.
+          if (LC_ALL=ja_JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_ja=ja_JP
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=ja_JP.EUC-JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_ja=ja_JP.EUC-JP
+            else
+              # Test for the HP-UX, OSF/1, NetBSD locale name.
+              if (LC_ALL=ja_JP.eucJP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_ja=ja_JP.eucJP
+              else
+                # Test for the IRIX, FreeBSD locale name.
+                if (LC_ALL=ja_JP.EUC LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_ja=ja_JP.EUC
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=ja LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_ja=ja
+                  else
+                    # Special test for NetBSD 1.6.
+                    if test -f /usr/share/locale/ja_JP.eucJP/LC_CTYPE; then
+                      gt_cv_locale_ja=ja_JP.eucJP
+                    else
+                      # None found.
+                      gt_cv_locale_ja=none
+                    fi
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_ja" >&5
+printf "%s\n" "$gt_cv_locale_ja" >&6; }
+  LOCALE_JA=$gt_cv_locale_ja
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a transitional chinese locale" >&5
+printf %s "checking for a transitional chinese locale... " >&6; }
+if test ${gt_cv_locale_zh_CN+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding (except on MirBSD).  */
+  {
+    const char *p;
+    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+    for (p = buf; *p != '\0'; p++)
+      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+        return 1;
+  }
+  /* Check whether a typical GB18030 multibyte sequence is recognized as a
+     single wide character.  This excludes the GB2312 and GBK encodings.  */
+  if (mblen ("\203\062\332\066", 5) != 4)
+    return 1;
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=Chinese_China.54936 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=Chinese_China.54936
+          else
+            # None found.
+            gt_cv_locale_zh_CN=none
+          fi
+          ;;
+        solaris2.8)
+          # On Solaris 8, the locales zh_CN.GB18030, zh_CN.GBK, zh.GBK are
+          # broken. One witness is the test case in gl_MBRTOWC_SANITYCHECK.
+          # Another witness is that "LC_ALL=zh_CN.GB18030 bash -c true" dumps core.
+          gt_cv_locale_zh_CN=none
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the locale name without encoding suffix.
+          if (LC_ALL=zh_CN LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=zh_CN
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=zh_CN.GB18030 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_zh_CN=zh_CN.GB18030
+            else
+              # None found.
+              gt_cv_locale_zh_CN=none
+            fi
+          fi
+          ;;
+      esac
+    else
+      # If there was a link error, due to mblen(), the system is so old that
+      # it certainly doesn't have a chinese locale.
+      gt_cv_locale_zh_CN=none
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_zh_CN" >&5
+printf "%s\n" "$gt_cv_locale_zh_CN" >&6; }
+  LOCALE_ZH_CN=$gt_cv_locale_zh_CN
+
+
+
+  if test "$ac_cv_header_winsock2_h" = yes; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS setsockopt.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_SETSOCKOPT" != 1; then
+        if test "$GL_GNULIB_SETSOCKOPT" = 0; then
+      GL_GNULIB_SETSOCKOPT=$gl_module_indicator_condition
+    else
+      GL_GNULIB_SETSOCKOPT="($GL_GNULIB_SETSOCKOPT || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_SETSOCKOPT 1" >>confdefs.h
+
+
+
+
+
+
+  if test $ac_cv_func_sigaction = yes; then
+    ac_fn_c_check_member "$LINENO" "struct sigaction" "sa_sigaction" "ac_cv_member_struct_sigaction_sa_sigaction" "#include <signal.h>
+"
+if test "x$ac_cv_member_struct_sigaction_sa_sigaction" = xyes
+then :
+
+printf "%s\n" "#define HAVE_STRUCT_SIGACTION_SA_SIGACTION 1" >>confdefs.h
+
+
+fi
+
+    if test $ac_cv_member_struct_sigaction_sa_sigaction = no; then
+      HAVE_STRUCT_SIGACTION_SA_SIGACTION=0
+    fi
+  else
+    HAVE_SIGACTION=0
+  fi
+
+  if test $HAVE_SIGACTION = 0; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS sigaction.$ac_objext"
+
+
+
+
+
+
+
+  ac_fn_c_check_type "$LINENO" "siginfo_t" "ac_cv_type_siginfo_t" "
+#include <signal.h>
+
+"
+if test "x$ac_cv_type_siginfo_t" = xyes
+then :
+
+printf "%s\n" "#define HAVE_SIGINFO_T 1" >>confdefs.h
+
+
+fi
+
+  if test $ac_cv_type_siginfo_t = no; then
+    HAVE_SIGINFO_T=0
+  fi
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_SIGACTION" != 1; then
+        if test "$GL_GNULIB_SIGACTION" = 0; then
+      GL_GNULIB_SIGACTION=$gl_module_indicator_condition
+    else
+      GL_GNULIB_SIGACTION="($GL_GNULIB_SIGACTION || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_SIGACTION 1" >>confdefs.h
+
+
+
+
+
+
+  HAVE_POSIX_SIGNALBLOCKING=0
+  if test "$gl_cv_type_sigset_t" = yes; then
+    ac_fn_c_check_func "$LINENO" "sigprocmask" "ac_cv_func_sigprocmask"
+if test "x$ac_cv_func_sigprocmask" = xyes
+then :
+  HAVE_POSIX_SIGNALBLOCKING=1
+fi
+
+  fi
+
+  if test $HAVE_POSIX_SIGNALBLOCKING = 0; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS sigprocmask.$ac_objext"
+
+    :
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_SIGPROCMASK" != 1; then
+        if test "$GL_GNULIB_SIGPROCMASK" = 0; then
+      GL_GNULIB_SIGPROCMASK=$gl_module_indicator_condition
+    else
+      GL_GNULIB_SIGPROCMASK="($GL_GNULIB_SIGPROCMASK || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_SIGPROCMASK 1" >>confdefs.h
+
+
+
+
+
+
+  ac_fn_c_check_header_compile "$LINENO" "stdint.h" "ac_cv_header_stdint_h" "$ac_includes_default"
+if test "x$ac_cv_header_stdint_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_STDINT_H 1" >>confdefs.h
+
+fi
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for SIZE_MAX" >&5
+printf %s "checking for SIZE_MAX... " >&6; }
+if test ${gl_cv_size_max+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    gl_cv_size_max=no
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <limits.h>
+#if HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#ifdef SIZE_MAX
+Found it
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Found it" >/dev/null 2>&1
+then :
+  gl_cv_size_max=yes
+fi
+rm -rf conftest*
+
+    if test $gl_cv_size_max != yes; then
+                        if ac_fn_c_compute_int "$LINENO" "sizeof (size_t) * CHAR_BIT - 1" "size_t_bits_minus_1"        "#include <stddef.h>
+#include <limits.h>"
+then :
+
+else $as_nop
+  size_t_bits_minus_1=
+fi
+
+      if ac_fn_c_compute_int "$LINENO" "sizeof (size_t) <= sizeof (unsigned int)" "fits_in_uint"        "#include <stddef.h>"
+then :
+
+else $as_nop
+  fits_in_uint=
+fi
+
+      if test -n "$size_t_bits_minus_1" && test -n "$fits_in_uint"; then
+        if test $fits_in_uint = 1; then
+                              cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stddef.h>
+                 extern size_t foo;
+                 extern unsigned long foo;
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  fits_in_uint=0
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+        fi
+                                if test $fits_in_uint = 1; then
+          gl_cv_size_max="(((1U << $size_t_bits_minus_1) - 1) * 2 + 1)"
+        else
+          gl_cv_size_max="(((1UL << $size_t_bits_minus_1) - 1) * 2 + 1)"
+        fi
+      else
+                gl_cv_size_max='((size_t)~(size_t)0)'
+      fi
+    fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_size_max" >&5
+printf "%s\n" "$gl_cv_size_max" >&6; }
+  if test "$gl_cv_size_max" != yes; then
+
+printf "%s\n" "#define SIZE_MAX $gl_cv_size_max" >>confdefs.h
+
+  fi
+
+
+
+
+               ac_fn_check_decl "$LINENO" "sleep" "ac_cv_have_decl_sleep" "#include <unistd.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_sleep" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_SLEEP $ac_have_decl" >>confdefs.h
+
+
+  if test $ac_cv_have_decl_sleep != yes; then
+    HAVE_SLEEP=0
+  else
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working sleep" >&5
+printf %s "checking for working sleep... " >&6; }
+if test ${gl_cv_func_sleep_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                        # Guess yes on glibc systems.
+         *-gnu* | gnu*) gl_cv_func_sleep_works="guessing yes" ;;
+                        # Guess yes on musl systems.
+         *-musl*)       gl_cv_func_sleep_works="guessing yes" ;;
+                        # Guess no on native Windows.
+         mingw*)        gl_cv_func_sleep_works="guessing no" ;;
+                        # If we don't know, obey --enable-cross-guesses.
+         *)             gl_cv_func_sleep_works="$gl_cross_guess_normal" ;;
+       esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <errno.h>
+#include <unistd.h>
+#include <signal.h>
+static void
+handle_alarm (int sig)
+{
+  if (sig != SIGALRM)
+    _exit (2);
+}
+
+int
+main (void)
+{
+
+    /* Failure to compile this test due to missing alarm is okay,
+       since all such platforms (mingw) also lack sleep.  */
+    unsigned int pentecost = 50 * 24 * 60 * 60; /* 50 days.  */
+    unsigned int remaining;
+    signal (SIGALRM, handle_alarm);
+    alarm (1);
+    remaining = sleep (pentecost);
+    if (remaining > pentecost)
+      return 3;
+    if (remaining <= pentecost - 10)
+      return 4;
+    return 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_sleep_works=yes
+else $as_nop
+  gl_cv_func_sleep_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_sleep_works" >&5
+printf "%s\n" "$gl_cv_func_sleep_works" >&6; }
+    case "$gl_cv_func_sleep_works" in
+      *yes) ;;
+      *)
+        REPLACE_SLEEP=1
+        ;;
+    esac
+  fi
+
+  if test $HAVE_SLEEP = 0 || test $REPLACE_SLEEP = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS sleep.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_SLEEP" != 1; then
+        if test "$GL_GNULIB_SLEEP" = 0; then
+      GL_GNULIB_SLEEP=$gl_module_indicator_condition
+    else
+      GL_GNULIB_SLEEP="($GL_GNULIB_SLEEP || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_SLEEP 1" >>confdefs.h
+
+
+
+
+
+
+  gl_cv_func_snprintf_usable=no
+  ac_fn_c_check_func "$LINENO" "snprintf" "ac_cv_func_snprintf"
+if test "x$ac_cv_func_snprintf" = xyes
+then :
+  printf "%s\n" "#define HAVE_SNPRINTF 1" >>confdefs.h
+
+fi
+
+  if test $ac_cv_func_snprintf = yes; then
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether snprintf respects a size of 1" >&5
+printf %s "checking whether snprintf respects a size of 1... " >&6; }
+if test ${gl_cv_func_snprintf_size1+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                            # Guess yes on Android.
+           linux*-android*) gl_cv_func_snprintf_size1="guessing yes" ;;
+                            # Guess yes on native Windows.
+           mingw*)          gl_cv_func_snprintf_size1="guessing yes" ;;
+           *)               gl_cv_func_snprintf_size1="guessing yes" ;;
+         esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdio.h>
+#if HAVE_SNPRINTF
+# define my_snprintf snprintf
+#else
+# include <stdarg.h>
+static int my_snprintf (char *buf, int size, const char *format, ...)
+{
+  va_list args;
+  int ret;
+  va_start (args, format);
+  ret = vsnprintf (buf, size, format, args);
+  va_end (args);
+  return ret;
+}
+#endif
+int main()
+{
+  static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' };
+  my_snprintf (buf, 1, "%d", 12345);
+  return buf[1] != 'E';
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_snprintf_size1=yes
+else $as_nop
+  gl_cv_func_snprintf_size1=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_snprintf_size1" >&5
+printf "%s\n" "$gl_cv_func_snprintf_size1" >&6; }
+
+    case "$gl_cv_func_snprintf_size1" in
+      *yes)
+
+        case "$gl_cv_func_snprintf_retval_c99" in
+          *yes)
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether printf supports POSIX/XSI format strings with positions" >&5
+printf %s "checking whether printf supports POSIX/XSI format strings with positions... " >&6; }
+if test ${gl_cv_func_printf_positions+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      if test "$cross_compiling" = yes
+then :
+
+         case "$host_os" in
+           netbsd[1-3]* | netbsdelf[1-3]* | netbsdaout[1-3]* | netbsdcoff[1-3]*)
+                            gl_cv_func_printf_positions="guessing no";;
+           beos*)           gl_cv_func_printf_positions="guessing no";;
+                            # Guess yes on Android.
+           linux*-android*) gl_cv_func_printf_positions="guessing yes";;
+                            # Guess no on native Windows.
+           mingw* | pw*)    gl_cv_func_printf_positions="guessing no";;
+           *)               gl_cv_func_printf_positions="guessing yes";;
+         esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdio.h>
+#include <string.h>
+/* The string "%2$d %1$d", with dollar characters protected from the shell's
+   dollar expansion (possibly an autoconf bug).  */
+static char format[] = { '%', '2', '$', 'd', ' ', '%', '1', '$', 'd', '\0' };
+static char buf[100];
+int main ()
+{
+  sprintf (buf, format, 33, 55);
+  return (strcmp (buf, "55 33") != 0);
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_printf_positions=yes
+else $as_nop
+  gl_cv_func_printf_positions=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_printf_positions" >&5
+printf "%s\n" "$gl_cv_func_printf_positions" >&6; }
+
+            case "$gl_cv_func_printf_positions" in
+              *yes)
+                gl_cv_func_snprintf_usable=yes
+                ;;
+            esac
+            ;;
+        esac
+        ;;
+    esac
+  fi
+  if test $gl_cv_func_snprintf_usable = no; then
+
+
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS snprintf.$ac_objext"
+
+  if test $ac_cv_func_snprintf = yes; then
+    REPLACE_SNPRINTF=1
+  else
+
+    if test $ac_cv_have_decl_snprintf = yes; then
+                        REPLACE_SNPRINTF=1
+    fi
+  fi
+  :
+
+  fi
+
+  if test $ac_cv_have_decl_snprintf = no; then
+    HAVE_DECL_SNPRINTF=0
+  fi
+
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_SNPRINTF" != 1; then
+        if test "$GL_GNULIB_SNPRINTF" = 0; then
+      GL_GNULIB_SNPRINTF=$gl_module_indicator_condition
+    else
+      GL_GNULIB_SNPRINTF="($GL_GNULIB_SNPRINTF || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_SNPRINTF 1" >>confdefs.h
+
+
+
+
+
+printf "%s\n" "#define GNULIB_SNPRINTF $gl_module_indicator_condition" >>confdefs.h
+
+
+
+  if test "$ac_cv_header_winsock2_h" = yes; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS socket.$ac_objext"
+
+  fi
+  # When this module is used, sockets may actually occur as file descriptors,
+  # hence it is worth warning if the modules 'close' and 'ioctl' are not used.
+
+
+
+
+
+
+
+
+
+
+
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS=1
+    SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS=1
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_SOCKET" != 1; then
+        if test "$GL_GNULIB_SOCKET" = 0; then
+      GL_GNULIB_SOCKET=$gl_module_indicator_condition
+    else
+      GL_GNULIB_SOCKET="($GL_GNULIB_SOCKET || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_SOCKET 1" >>confdefs.h
+
+
+
+
+
+     ac_fn_c_check_type "$LINENO" "socklen_t" "ac_cv_type_socklen_t" "
+/* <sys/types.h> is not needed according to POSIX, but the
+   <sys/socket.h> in i386-unknown-freebsd4.10 and
+   powerpc-apple-darwin5.5 required it. */
+#include <sys/types.h>
+#if HAVE_SYS_SOCKET_H
+# include <sys/socket.h>
+#elif HAVE_WS2TCPIP_H
+# include <ws2tcpip.h>
+#endif
+
+"
+if test "x$ac_cv_type_socklen_t" = xyes
+then :
+
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for socklen_t equivalent" >&5
+printf %s "checking for socklen_t equivalent... " >&6; }
+if test ${gl_cv_socklen_t_equiv+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  # Systems have either "struct sockaddr *" or
+         # "void *" as the second argument to getpeername
+         gl_cv_socklen_t_equiv=
+         for arg2 in "struct sockaddr" void; do
+           for t in int size_t "unsigned int" "long int" "unsigned long int"; do
+             cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+                   #include <sys/socket.h>
+
+                   int getpeername (int, $arg2 *, $t *);
+int
+main (void)
+{
+$t len;
+                  getpeername (0, 0, &len);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_socklen_t_equiv="$t"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+             test "$gl_cv_socklen_t_equiv" != "" && break
+           done
+           test "$gl_cv_socklen_t_equiv" != "" && break
+         done
+         if test "$gl_cv_socklen_t_equiv" = ""; then
+           as_fn_error $? "Cannot find a type to use in place of socklen_t" "$LINENO" 5
+         fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_socklen_t_equiv" >&5
+printf "%s\n" "$gl_cv_socklen_t_equiv" >&6; }
+
+printf "%s\n" "#define socklen_t $gl_cv_socklen_t_equiv" >>confdefs.h
+
+fi
+
+
+
+
+
+
+
+
+
+
+  if test $ac_cv_have_decl_strerror_r = no; then
+    HAVE_DECL_STRERROR_R=0
+  fi
+
+  if test $ac_cv_func_strerror_r = yes; then
+    if test "$ERRNO_H:$REPLACE_STRERROR_0" = :0; then
+      if test $gl_cv_func_strerror_r_posix_signature = yes; then
+        case "$gl_cv_func_strerror_r_works" in
+                    *no) REPLACE_STRERROR_R=1 ;;
+        esac
+      else
+                REPLACE_STRERROR_R=1
+      fi
+    else
+                  REPLACE_STRERROR_R=1
+    fi
+  fi
+
+  if test $HAVE_DECL_STRERROR_R = 0 || test $REPLACE_STRERROR_R = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS strerror_r.$ac_objext"
+
+
+
+
+
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_STRERROR_R" != 1; then
+        if test "$GL_GNULIB_STRERROR_R" = 0; then
+      GL_GNULIB_STRERROR_R=$gl_module_indicator_condition
+    else
+      GL_GNULIB_STRERROR_R="($GL_GNULIB_STRERROR_R || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_STRERROR_R 1" >>confdefs.h
+
+
+
+
+
+printf "%s\n" "#define GNULIB_STRERROR_R_POSIX $gl_module_indicator_condition" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+        if test $ac_cv_func_symlink = no; then
+    HAVE_SYMLINK=0
+  else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether symlink handles trailing slash correctly" >&5
+printf %s "checking whether symlink handles trailing slash correctly... " >&6; }
+if test ${gl_cv_func_symlink_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                             # Guess yes on Linux systems.
+            linux-* | linux) gl_cv_func_symlink_works="guessing yes" ;;
+                             # Guess yes on glibc systems.
+            *-gnu* | gnu*)   gl_cv_func_symlink_works="guessing yes" ;;
+                             # If we don't know, obey --enable-cross-guesses.
+            *)               gl_cv_func_symlink_works="$gl_cross_guess_normal" ;;
+          esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <unistd.h>
+
+int
+main (void)
+{
+int result = 0;
+             if (!symlink ("a", "conftest.link/"))
+               result |= 1;
+             if (symlink ("conftest.f", "conftest.lnk2"))
+               result |= 2;
+             else if (!symlink ("a", "conftest.lnk2/"))
+               result |= 4;
+             return result;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_symlink_works=yes
+else $as_nop
+  gl_cv_func_symlink_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      rm -f conftest.f conftest.link conftest.lnk2
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_symlink_works" >&5
+printf "%s\n" "$gl_cv_func_symlink_works" >&6; }
+    case "$gl_cv_func_symlink_works" in
+      *yes) ;;
+      *)
+        REPLACE_SYMLINK=1
+        ;;
+    esac
+  fi
+
+  if test $HAVE_SYMLINK = 0 || test $REPLACE_SYMLINK = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS symlink.$ac_objext"
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_SYMLINK" != 1; then
+        if test "$GL_GNULIB_SYMLINK" = 0; then
+      GL_GNULIB_SYMLINK=$gl_module_indicator_condition
+    else
+      GL_GNULIB_SYMLINK="($GL_GNULIB_SYMLINK || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_SYMLINK 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  if test $gl_threads_api = posix; then
+    gl_save_LIBS="$LIBS"
+    LIBS="$LIBS $LIBMULTITHREAD"
+    ac_fn_c_check_func "$LINENO" "pthread_atfork" "ac_cv_func_pthread_atfork"
+if test "x$ac_cv_func_pthread_atfork" = xyes
+then :
+  printf "%s\n" "#define HAVE_PTHREAD_ATFORK 1" >>confdefs.h
+
+fi
+
+    LIBS="$gl_save_LIBS"
+  fi
+
+  ac_fn_c_check_header_compile "$LINENO" "sys/single_threaded.h" "ac_cv_header_sys_single_threaded_h" "$ac_includes_default"
+if test "x$ac_cv_header_sys_single_threaded_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYS_SINGLE_THREADED_H 1" >>confdefs.h
+
+fi
+
+
+
+
+  if test $ac_cv_have_decl_unsetenv = no; then
+    HAVE_DECL_UNSETENV=0
+  fi
+  ac_fn_c_check_func "$LINENO" "unsetenv" "ac_cv_func_unsetenv"
+if test "x$ac_cv_func_unsetenv" = xyes
+then :
+  printf "%s\n" "#define HAVE_UNSETENV 1" >>confdefs.h
+
+fi
+
+  if test $ac_cv_func_unsetenv = no; then
+    HAVE_UNSETENV=0
+  else
+    HAVE_UNSETENV=1
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for unsetenv() return type" >&5
+printf %s "checking for unsetenv() return type... " >&6; }
+if test ${gt_cv_func_unsetenv_ret+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#undef _BSD
+#define _BSD 1 /* unhide unsetenv declaration in OSF/1 5.1 <stdlib.h> */
+#include <stdlib.h>
+extern
+#ifdef __cplusplus
+"C"
+#endif
+int unsetenv (const char *name);
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gt_cv_func_unsetenv_ret='int'
+else $as_nop
+  gt_cv_func_unsetenv_ret='void'
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_func_unsetenv_ret" >&5
+printf "%s\n" "$gt_cv_func_unsetenv_ret" >&6; }
+    if test $gt_cv_func_unsetenv_ret = 'void'; then
+
+printf "%s\n" "#define VOID_UNSETENV 1" >>confdefs.h
+
+      REPLACE_UNSETENV=1
+    fi
+
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether unsetenv obeys POSIX" >&5
+printf %s "checking whether unsetenv obeys POSIX... " >&6; }
+if test ${gl_cv_func_unsetenv_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+                    # Guess yes on glibc systems.
+            *-gnu*) gl_cv_func_unsetenv_works="guessing yes" ;;
+                    # If we don't know, obey --enable-cross-guesses.
+            *)      gl_cv_func_unsetenv_works="$gl_cross_guess_normal" ;;
+          esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+            #include <stdlib.h>
+            #include <errno.h>
+            extern char **environ;
+
+
+$gl_mda_defines
+
+int
+main (void)
+{
+
+            char entry1[] = "a=1";
+            char entry2[] = "b=2";
+            char *env[] = { entry1, entry2, NULL };
+            if (putenv ((char *) "a=1")) return 1;
+            if (putenv (entry2)) return 2;
+            entry2[0] = 'a';
+            unsetenv ("a");
+            if (getenv ("a")) return 3;
+            if (!unsetenv ("") || errno != EINVAL) return 4;
+            entry2[0] = 'b';
+            environ = env;
+            if (!getenv ("a")) return 5;
+            entry2[0] = 'a';
+            unsetenv ("a");
+            if (getenv ("a")) return 6;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_unsetenv_works=yes
+else $as_nop
+  gl_cv_func_unsetenv_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_unsetenv_works" >&5
+printf "%s\n" "$gl_cv_func_unsetenv_works" >&6; }
+    case "$gl_cv_func_unsetenv_works" in
+      *yes) ;;
+      *)
+        REPLACE_UNSETENV=1
+        ;;
+    esac
+  fi
+
+  if test $HAVE_UNSETENV = 0 || test $REPLACE_UNSETENV = 1; then
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS unsetenv.$ac_objext"
+
+
+
+
+
+  fi
+
+
+
+
+
+
+
+
+
+    if test "$GL_GNULIB_UNSETENV" != 1; then
+        if test "$GL_GNULIB_UNSETENV" = 0; then
+      GL_GNULIB_UNSETENV=$gl_module_indicator_condition
+    else
+      GL_GNULIB_UNSETENV="($GL_GNULIB_UNSETENV || $gl_module_indicator_condition)"
+    fi
+  fi
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_UNSETENV 1" >>confdefs.h
+
+
+
+
+
+
+  if test $ac_cv_func_vasnprintf = no; then
+
+
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS vasnprintf.$ac_objext"
+
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS printf-args.$ac_objext"
+
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS printf-parse.$ac_objext"
+
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS asnprintf.$ac_objext"
+
+  if test $ac_cv_func_vasnprintf = yes; then
+
+printf "%s\n" "#define REPLACE_VASNPRINTF 1" >>confdefs.h
+
+  fi
+
+
+
+
+
+
+
+
+
+  ac_fn_c_check_type "$LINENO" "ptrdiff_t" "ac_cv_type_ptrdiff_t" "$ac_includes_default"
+if test "x$ac_cv_type_ptrdiff_t" = xyes
+then :
+
+else $as_nop
+
+printf "%s\n" "#define ptrdiff_t long" >>confdefs.h
+
+
+fi
+
+
+
+
+
+
+
+  fi
+
+  abs_aux_dir=`cd "$ac_aux_dir"; pwd`
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a traditional french locale" >&5
+printf %s "checking for a traditional french locale... " >&6; }
+if test ${gt_cv_locale_fr+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is only
+     one byte long. This excludes the UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 3 || buf[2] != 'v') return 1;
+# if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+# endif
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the native Windows locale name.
+          if (LC_ALL=French_France.1252 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=French_France.1252
+          else
+            # None found.
+            gt_cv_locale_fr=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.ISO-8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr=fr_FR.ISO-8859-1
+            else
+              # Test for the AIX, OSF/1, FreeBSD, NetBSD, OpenBSD locale name.
+              if (LC_ALL=fr_FR.ISO8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr=fr_FR.ISO8859-1
+              else
+                # Test for the HP-UX locale name.
+                if (LC_ALL=fr_FR.iso88591 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_fr=fr_FR.iso88591
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=fr LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_fr=fr
+                  else
+                    # None found.
+                    gt_cv_locale_fr=none
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr" >&5
+printf "%s\n" "$gt_cv_locale_fr" >&6; }
+  LOCALE_FR=$gt_cv_locale_fr
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a french Unicode locale" >&5
+printf %s "checking for a french Unicode locale... " >&6; }
+if test ${gt_cv_locale_fr_utf8+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if !(defined __BEOS__ || defined __HAIKU__)
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is
+     two bytes long, with UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 4
+      || buf[1] != (char) 0xc3 || buf[2] != (char) 0xa9 || buf[3] != 'v')
+    return 1;
+#endif
+#if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+#endif
+  return 0;
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=French_France.65001 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=French_France.65001
+          else
+            # None found.
+            gt_cv_locale_fr_utf8=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr_utf8=fr_FR.UTF-8
+            else
+              # Test for the Solaris 7 locale name.
+              if (LC_ALL=fr.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr_utf8=fr.UTF-8
+              else
+                # None found.
+                gt_cv_locale_fr_utf8=none
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr_utf8" >&5
+printf "%s\n" "$gt_cv_locale_fr_utf8" >&6; }
+  LOCALE_FR_UTF8=$gt_cv_locale_fr_utf8
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a traditional japanese locale" >&5
+printf %s "checking for a traditional japanese locale... " >&6; }
+if test ${gt_cv_locale_ja+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether MB_CUR_MAX is > 1.  This excludes the dysfunctional locales
+     on Cygwin 1.5.x.  */
+  if (MB_CUR_MAX == 1)
+    return 1;
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding (except on MirBSD).  */
+  {
+    const char *p;
+    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+    for (p = buf; *p != '\0'; p++)
+      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+        return 1;
+  }
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Note that on native Windows, the Japanese locale is
+          # Japanese_Japan.932, and CP932 is very different from EUC-JP, so we
+          # cannot use it here.
+          gt_cv_locale_ja=none
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the AIX locale name.
+          if (LC_ALL=ja_JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_ja=ja_JP
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=ja_JP.EUC-JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_ja=ja_JP.EUC-JP
+            else
+              # Test for the HP-UX, OSF/1, NetBSD locale name.
+              if (LC_ALL=ja_JP.eucJP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_ja=ja_JP.eucJP
+              else
+                # Test for the IRIX, FreeBSD locale name.
+                if (LC_ALL=ja_JP.EUC LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_ja=ja_JP.EUC
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=ja LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_ja=ja
+                  else
+                    # Special test for NetBSD 1.6.
+                    if test -f /usr/share/locale/ja_JP.eucJP/LC_CTYPE; then
+                      gt_cv_locale_ja=ja_JP.eucJP
+                    else
+                      # None found.
+                      gt_cv_locale_ja=none
+                    fi
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_ja" >&5
+printf "%s\n" "$gt_cv_locale_ja" >&6; }
+  LOCALE_JA=$gt_cv_locale_ja
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a transitional chinese locale" >&5
+printf %s "checking for a transitional chinese locale... " >&6; }
+if test ${gt_cv_locale_zh_CN+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding (except on MirBSD).  */
+  {
+    const char *p;
+    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+    for (p = buf; *p != '\0'; p++)
+      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+        return 1;
+  }
+  /* Check whether a typical GB18030 multibyte sequence is recognized as a
+     single wide character.  This excludes the GB2312 and GBK encodings.  */
+  if (mblen ("\203\062\332\066", 5) != 4)
+    return 1;
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=Chinese_China.54936 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=Chinese_China.54936
+          else
+            # None found.
+            gt_cv_locale_zh_CN=none
+          fi
+          ;;
+        solaris2.8)
+          # On Solaris 8, the locales zh_CN.GB18030, zh_CN.GBK, zh.GBK are
+          # broken. One witness is the test case in gl_MBRTOWC_SANITYCHECK.
+          # Another witness is that "LC_ALL=zh_CN.GB18030 bash -c true" dumps core.
+          gt_cv_locale_zh_CN=none
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the locale name without encoding suffix.
+          if (LC_ALL=zh_CN LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=zh_CN
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=zh_CN.GB18030 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_zh_CN=zh_CN.GB18030
+            else
+              # None found.
+              gt_cv_locale_zh_CN=none
+            fi
+          fi
+          ;;
+      esac
+    else
+      # If there was a link error, due to mblen(), the system is so old that
+      # it certainly doesn't have a chinese locale.
+      gt_cv_locale_zh_CN=none
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_zh_CN" >&5
+printf "%s\n" "$gt_cv_locale_zh_CN" >&6; }
+  LOCALE_ZH_CN=$gt_cv_locale_zh_CN
+
+
+
+  case "$host_os" in
+    mingw*)
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS windows-thread.$ac_objext"
+
+      ;;
+  esac
+
+  case "$host_os" in
+    mingw*)
+
+
+
+
+
+
+
+
+  gltests_LIBOBJS="$gltests_LIBOBJS windows-tls.$ac_objext"
+
+      ;;
+  esac
+
+
+  ac_fn_c_check_header_compile "$LINENO" "stdint.h" "ac_cv_header_stdint_h" "$ac_includes_default"
+if test "x$ac_cv_header_stdint_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_STDINT_H 1" >>confdefs.h
+
+fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  LIBGREPUTILS_LIBDEPS="$gl_libdeps"
+
+  LIBGREPUTILS_LTLIBDEPS="$gl_ltlibdeps"
+
+  LIBTESTS_LIBDEPS="$gltests_libdeps"
+
+
+
+# Ensure VLAs are not used.
+# Note -Wvla is implicitly added by gl_MANYWARN_ALL_GCC
+
+printf "%s\n" "#define GNULIB_NO_VLA 1" >>confdefs.h
+
+
+# The test suite needs to know if we have a working perl.
+# FIXME: this is suboptimal.  Ideally, we would be able to call gl_PERL
+# with an ACTION-IF-NOT-FOUND argument ...
+cu_have_perl=yes
+case $PERL in *"/missing "*) cu_have_perl=no;; esac
+ if test $cu_have_perl = yes; then
+  HAVE_PERL_TRUE=
+  HAVE_PERL_FALSE='#'
+else
+  HAVE_PERL_TRUE='#'
+  HAVE_PERL_FALSE=
+fi
+
+
+# Check whether --enable-gcc-warnings was given.
+if test ${enable_gcc_warnings+y}
+then :
+  enableval=$enable_gcc_warnings; case $enableval in
+     yes|no) ;;
+     *)      as_fn_error $? "bad value $enableval for gcc-warnings option" "$LINENO" 5 ;;
+   esac
+   gl_gcc_warnings=$enableval
+else $as_nop
+  gl_gcc_warnings=no
+   if test "$GCC" = yes && test -d "$srcdir"/.git; then
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+          #if ! (6 < __GNUC__ + (2 <= __GNUC_MINOR__))
+            #error "--enable-gcc-warnings defaults to 'no' on older GCC"
+          #endif
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_gcc_warnings=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+   fi
+
+fi
+
+
+if test "$gl_gcc_warnings" = yes; then
+
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler handles -Werror -Wunknown-warning-option" >&5
+printf %s "checking whether C compiler handles -Werror -Wunknown-warning-option... " >&6; }
+if test ${gl_cv_warn_c__Werror__Wunknown_warning_option+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  gl_save_compiler_FLAGS="$CFLAGS"
+  as_fn_append CFLAGS " $gl_unknown_warnings_are_errors -Werror -Wunknown-warning-option"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_warn_c__Werror__Wunknown_warning_option=yes
+else $as_nop
+  gl_cv_warn_c__Werror__Wunknown_warning_option=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+  CFLAGS="$gl_save_compiler_FLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_warn_c__Werror__Wunknown_warning_option" >&5
+printf "%s\n" "$gl_cv_warn_c__Werror__Wunknown_warning_option" >&6; }
+if test "x$gl_cv_warn_c__Werror__Wunknown_warning_option" = xyes
+then :
+  gl_unknown_warnings_are_errors='-Wunknown-warning-option -Werror'
+else $as_nop
+  gl_unknown_warnings_are_errors=
+fi
+
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler handles -Werror" >&5
+printf %s "checking whether C compiler handles -Werror... " >&6; }
+if test ${gl_cv_warn_c__Werror+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  gl_save_compiler_FLAGS="$CFLAGS"
+  as_fn_append CFLAGS " $gl_unknown_warnings_are_errors -Werror"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_warn_c__Werror=yes
+else $as_nop
+  gl_cv_warn_c__Werror=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+  CFLAGS="$gl_save_compiler_FLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_warn_c__Werror" >&5
+printf "%s\n" "$gl_cv_warn_c__Werror" >&6; }
+if test "x$gl_cv_warn_c__Werror" = xyes
+then :
+  as_fn_append WERROR_CFLAGS " -Werror"
+fi
+
+
+
+
+  nw=
+  # This, $nw, is the list of warnings we disable.
+  nw="$nw -Wdeclaration-after-statement" # too useful to forbid
+  nw="$nw -Waggregate-return"       # anachronistic
+  nw="$nw -Wlong-long"              # C90 is anachronistic (lib/gethrxtime.h)
+  nw="$nw -Wc++-compat"             # We don't care about C++ compilers
+  nw="$nw -Wundef"                  # Warns on '#if GNULIB_FOO' etc in gnulib
+  nw="$nw -Wsystem-headers"         # Don't let system headers trigger warnings
+  nw="$nw -Wpadded"                 # Our structs are not padded
+  nw="$nw -Wstack-protector"        # generates false alarms for useful code
+  nw="$nw -Wswitch-default"         # Too many warnings for now
+  nw="$nw -Wunsafe-loop-optimizations" # OK to suppress unsafe optimizations
+  nw="$nw -Winline"                 # streq.h's streq4, streq6 and strcaseeq6
+  nw="$nw -Wstrict-overflow"        # regexec.c
+
+
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
+  if test -n "$GCC"; then
+
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether -Wno-missing-field-initializers is supported" >&5
+printf %s "checking whether -Wno-missing-field-initializers is supported... " >&6; }
+if test ${gl_cv_cc_nomfi_supported+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -Wextra -Werror -Wno-missing-field-initializers"
+       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_cc_nomfi_supported=yes
+else $as_nop
+  gl_cv_cc_nomfi_supported=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+       CFLAGS="$gl_save_CFLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_cc_nomfi_supported" >&5
+printf "%s\n" "$gl_cv_cc_nomfi_supported" >&6; }
+
+    if test "$gl_cv_cc_nomfi_supported" = yes; then
+                  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether -Wno-missing-field-initializers is needed" >&5
+printf %s "checking whether -Wno-missing-field-initializers is needed... " >&6; }
+if test ${gl_cv_cc_nomfi_needed+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_save_CFLAGS="$CFLAGS"
+         CFLAGS="$CFLAGS -Wextra -Werror"
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+int f (void)
+                {
+                  typedef struct { int a; int b; } s_t;
+                  s_t s1 = { 0, };
+                  return s1.b;
+                }
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_cc_nomfi_needed=no
+else $as_nop
+  gl_cv_cc_nomfi_needed=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+         CFLAGS="$gl_save_CFLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_cc_nomfi_needed" >&5
+printf "%s\n" "$gl_cv_cc_nomfi_needed" >&6; }
+    fi
+
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether -Wuninitialized is supported" >&5
+printf %s "checking whether -Wuninitialized is supported... " >&6; }
+if test ${gl_cv_cc_uninitialized_supported+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -Werror -Wuninitialized"
+       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_cc_uninitialized_supported=yes
+else $as_nop
+  gl_cv_cc_uninitialized_supported=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+       CFLAGS="$gl_save_CFLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_cc_uninitialized_supported" >&5
+printf "%s\n" "$gl_cv_cc_uninitialized_supported" >&6; }
+
+  fi
+
+  # List all gcc warning categories.
+  # To compare this list to your installed GCC's, run this Bash command:
+  #
+  # comm -3 \
+  #  <((sed -n 's/^  *\(-[^ 0-9][^ ]*\).*/\1/p' manywarnings.m4; \
+  #     awk '/^[^#]/ {print ws}' ../build-aux/gcc-warning.spec) | sort) \
+  #  <(LC_ALL=C gcc --help=warnings | sed -n 's/^  \(-[^ ]*\) .*/\1/p' | sort)
+
+  ws=
+  for gl_manywarn_item in -fanalyzer -fno-common \
+    -Wall \
+    -Warith-conversion \
+    -Wbad-function-cast \
+    -Wcast-align=strict \
+    -Wdate-time \
+    -Wdisabled-optimization \
+    -Wdouble-promotion \
+    -Wduplicated-branches \
+    -Wduplicated-cond \
+    -Wextra \
+    -Wformat-signedness \
+    -Winit-self \
+    -Winline \
+    -Winvalid-pch \
+    -Wlogical-op \
+    -Wmissing-declarations \
+    -Wmissing-include-dirs \
+    -Wmissing-prototypes \
+    -Wnested-externs \
+    -Wnull-dereference \
+    -Wold-style-definition \
+    -Wopenmp-simd \
+    -Woverlength-strings \
+    -Wpacked \
+    -Wpointer-arith \
+    -Wshadow \
+    -Wstack-protector \
+    -Wstrict-overflow \
+    -Wstrict-prototypes \
+    -Wsuggest-attribute=cold \
+    -Wsuggest-attribute=const \
+    -Wsuggest-attribute=format \
+    -Wsuggest-attribute=malloc \
+    -Wsuggest-attribute=noreturn \
+    -Wsuggest-attribute=pure \
+    -Wsuggest-final-methods \
+    -Wsuggest-final-types \
+    -Wsync-nand \
+    -Wsystem-headers \
+    -Wtrampolines \
+    -Wuninitialized \
+    -Wunknown-pragmas \
+    -Wunsafe-loop-optimizations \
+    -Wunused-macros \
+    -Wvariadic-macros \
+    -Wvector-operation-performance \
+    -Wvla \
+    -Wwrite-strings \
+    \
+    ; do
+    as_fn_append ws " $gl_manywarn_item"
+  done
+
+  # gcc --help=warnings outputs an unusual form for these options; list
+  # them here so that the above 'comm' command doesn't report a false match.
+  as_fn_append ws ' -Warray-bounds=2'
+  as_fn_append ws ' -Wattribute-alias=2'
+  as_fn_append ws ' -Wformat-overflow=2'
+  as_fn_append ws ' -Wformat=2'
+  as_fn_append ws ' -Wformat-truncation=2'
+  as_fn_append ws ' -Wimplicit-fallthrough=5'
+  as_fn_append ws ' -Wshift-overflow=2'
+  as_fn_append ws ' -Wunused-const-variable=2'
+  as_fn_append ws ' -Wvla-larger-than=4031'
+
+  # These are needed for older GCC versions.
+  if test -n "$GCC"; then
+    case `($CC --version) 2>/dev/null` in
+      'gcc (GCC) '[0-3].* | \
+      'gcc (GCC) '4.[0-7].*)
+        as_fn_append ws ' -fdiagnostics-show-option'
+        as_fn_append ws ' -funit-at-a-time'
+          ;;
+    esac
+  fi
+
+  # Disable specific options as needed.
+  if test "$gl_cv_cc_nomfi_needed" = yes; then
+    as_fn_append ws ' -Wno-missing-field-initializers'
+  fi
+
+  if test "$gl_cv_cc_uninitialized_supported" = no; then
+    as_fn_append ws ' -Wno-uninitialized'
+  fi
+
+  # This warning have too many false alarms in GCC 11.2.1.
+  # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101713
+  as_fn_append ws ' -Wno-analyzer-malloc-leak'
+
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
+  gl_warn_set=
+  set x $ws; shift
+  for gl_warn_item
+  do
+    case " $nw " in
+      *" $gl_warn_item "*)
+        ;;
+      *)
+        as_fn_append gl_warn_set " $gl_warn_item"
+        ;;
+    esac
+  done
+  ws=$gl_warn_set
+
+  for w in $ws; do
+
+
+as_gl_Warn=`printf "%s\n" "gl_cv_warn_c_$w" | $as_tr_sh`
+gl_positive="$w"
+case $gl_positive in
+  -Wno-*) gl_positive=-W`expr "X$gl_positive" : 'X-Wno-\(.*\)'` ;;
+esac
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler handles $w" >&5
+printf %s "checking whether C compiler handles $w... " >&6; }
+if eval test \${$as_gl_Warn+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  gl_save_compiler_FLAGS="$CFLAGS"
+  as_fn_append CFLAGS " $gl_unknown_warnings_are_errors $gl_positive"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  eval "$as_gl_Warn=yes"
+else $as_nop
+  eval "$as_gl_Warn=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+  CFLAGS="$gl_save_compiler_FLAGS"
+
+fi
+eval ac_res=\$$as_gl_Warn
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+if eval test \"x\$"$as_gl_Warn"\" = x"yes"
+then :
+  as_fn_append WARN_CFLAGS " $w"
+fi
+
+
+  done
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler handles -Wno-missing-field-initializers" >&5
+printf %s "checking whether C compiler handles -Wno-missing-field-initializers... " >&6; }
+if test ${gl_cv_warn_c__Wno_missing_field_initializers+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  gl_save_compiler_FLAGS="$CFLAGS"
+  as_fn_append CFLAGS " $gl_unknown_warnings_are_errors -Wmissing-field-initializers"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_warn_c__Wno_missing_field_initializers=yes
+else $as_nop
+  gl_cv_warn_c__Wno_missing_field_initializers=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+  CFLAGS="$gl_save_compiler_FLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_warn_c__Wno_missing_field_initializers" >&5
+printf "%s\n" "$gl_cv_warn_c__Wno_missing_field_initializers" >&6; }
+if test "x$gl_cv_warn_c__Wno_missing_field_initializers" = xyes
+then :
+  as_fn_append WARN_CFLAGS " -Wno-missing-field-initializers"
+fi
+
+ # We need this one
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler handles -Wno-sign-compare" >&5
+printf %s "checking whether C compiler handles -Wno-sign-compare... " >&6; }
+if test ${gl_cv_warn_c__Wno_sign_compare+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  gl_save_compiler_FLAGS="$CFLAGS"
+  as_fn_append CFLAGS " $gl_unknown_warnings_are_errors -Wsign-compare"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_warn_c__Wno_sign_compare=yes
+else $as_nop
+  gl_cv_warn_c__Wno_sign_compare=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+  CFLAGS="$gl_save_compiler_FLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_warn_c__Wno_sign_compare" >&5
+printf "%s\n" "$gl_cv_warn_c__Wno_sign_compare" >&6; }
+if test "x$gl_cv_warn_c__Wno_sign_compare" = xyes
+then :
+  as_fn_append WARN_CFLAGS " -Wno-sign-compare"
+fi
+
+     # Too many warnings for now
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler handles -Wno-unused-parameter" >&5
+printf %s "checking whether C compiler handles -Wno-unused-parameter... " >&6; }
+if test ${gl_cv_warn_c__Wno_unused_parameter+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  gl_save_compiler_FLAGS="$CFLAGS"
+  as_fn_append CFLAGS " $gl_unknown_warnings_are_errors -Wunused-parameter"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_warn_c__Wno_unused_parameter=yes
+else $as_nop
+  gl_cv_warn_c__Wno_unused_parameter=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+  CFLAGS="$gl_save_compiler_FLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_warn_c__Wno_unused_parameter" >&5
+printf "%s\n" "$gl_cv_warn_c__Wno_unused_parameter" >&6; }
+if test "x$gl_cv_warn_c__Wno_unused_parameter" = xyes
+then :
+  as_fn_append WARN_CFLAGS " -Wno-unused-parameter"
+fi
+
+ # Too many warnings for now
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler handles -Wno-cast-function-type" >&5
+printf %s "checking whether C compiler handles -Wno-cast-function-type... " >&6; }
+if test ${gl_cv_warn_c__Wno_cast_function_type+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  gl_save_compiler_FLAGS="$CFLAGS"
+  as_fn_append CFLAGS " $gl_unknown_warnings_are_errors -Wcast-function-type"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_warn_c__Wno_cast_function_type=yes
+else $as_nop
+  gl_cv_warn_c__Wno_cast_function_type=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+  CFLAGS="$gl_save_compiler_FLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_warn_c__Wno_cast_function_type" >&5
+printf "%s\n" "$gl_cv_warn_c__Wno_cast_function_type" >&6; }
+if test "x$gl_cv_warn_c__Wno_cast_function_type" = xyes
+then :
+  as_fn_append WARN_CFLAGS " -Wno-cast-function-type"
+fi
+
+ # sig-handler.h's sa_handler_t cast
+
+  # In spite of excluding -Wlogical-op above, it is enabled, as of
+  # gcc 4.5.0 20090517, and it provokes warnings in cat.c, dd.c, truncate.c
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler handles -Wno-logical-op" >&5
+printf %s "checking whether C compiler handles -Wno-logical-op... " >&6; }
+if test ${gl_cv_warn_c__Wno_logical_op+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  gl_save_compiler_FLAGS="$CFLAGS"
+  as_fn_append CFLAGS " $gl_unknown_warnings_are_errors -Wlogical-op"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_warn_c__Wno_logical_op=yes
+else $as_nop
+  gl_cv_warn_c__Wno_logical_op=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+  CFLAGS="$gl_save_compiler_FLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_warn_c__Wno_logical_op" >&5
+printf "%s\n" "$gl_cv_warn_c__Wno_logical_op" >&6; }
+if test "x$gl_cv_warn_c__Wno_logical_op" = xyes
+then :
+  as_fn_append WARN_CFLAGS " -Wno-logical-op"
+fi
+
+
+
+
+
+
+printf "%s\n" "#define lint 1" >>confdefs.h
+
+
+printf "%s\n" "#define GNULIB_PORTCHECK 1" >>confdefs.h
+
+
+
+  # We use a slightly smaller set of warning options for lib/.
+  # Remove the following and save the result in GNULIB_WARN_CFLAGS.
+  nw=
+  nw="$nw -Wunused-macros"
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler handles -Wno-format-nonliteral" >&5
+printf %s "checking whether C compiler handles -Wno-format-nonliteral... " >&6; }
+if test ${gl_cv_warn_c__Wno_format_nonliteral+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  gl_save_compiler_FLAGS="$CFLAGS"
+  as_fn_append CFLAGS " $gl_unknown_warnings_are_errors -Wformat-nonliteral"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_warn_c__Wno_format_nonliteral=yes
+else $as_nop
+  gl_cv_warn_c__Wno_format_nonliteral=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+  CFLAGS="$gl_save_compiler_FLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_warn_c__Wno_format_nonliteral" >&5
+printf "%s\n" "$gl_cv_warn_c__Wno_format_nonliteral" >&6; }
+if test "x$gl_cv_warn_c__Wno_format_nonliteral" = xyes
+then :
+  as_fn_append WARN_CFLAGS " -Wno-format-nonliteral"
+fi
+
+
+
+  gl_warn_set=
+  set x $WARN_CFLAGS; shift
+  for gl_warn_item
+  do
+    case " $nw " in
+      *" $gl_warn_item "*)
+        ;;
+      *)
+        as_fn_append gl_warn_set " $gl_warn_item"
+        ;;
+    esac
+  done
+  GNULIB_WARN_CFLAGS=$gl_warn_set
+
+
+
+  # For gnulib-tests, the set is slightly smaller still.
+  nw=
+  nw="$nw -Wstrict-prototypes"
+  # It's not worth being this picky about test programs.
+  nw="$nw -Wsuggest-attribute=const"
+  nw="$nw -Wsuggest-attribute=pure"
+  nw="$nw -Wsuggest-attribute=format"
+  nw="$nw -Wformat-truncation=2"    # False alarm in strerror_r.c
+  nw="$nw -Wold-style-definition"
+
+  # Disable to avoid warnings in e.g., test-intprops.c and test-limits-h.c
+  # due to overlong expansions like this:
+  # test-intprops.c:147:5: error: string literal of length 9531 exceeds \
+  # maximum length 4095 that ISO C99 compilers are required to support
+  nw="$nw -Woverlength-strings"
+
+
+  gl_warn_set=
+  set x $GNULIB_WARN_CFLAGS; shift
+  for gl_warn_item
+  do
+    case " $nw " in
+      *" $gl_warn_item "*)
+        ;;
+      *)
+        as_fn_append gl_warn_set " $gl_warn_item"
+        ;;
+    esac
+  done
+  GNULIB_TEST_WARN_CFLAGS=$gl_warn_set
+
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler handles -Wno-return-type" >&5
+printf %s "checking whether C compiler handles -Wno-return-type... " >&6; }
+if test ${gl_cv_warn_c__Wno_return_type+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  gl_save_compiler_FLAGS="$CFLAGS"
+  as_fn_append CFLAGS " $gl_unknown_warnings_are_errors -Wreturn-type"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_warn_c__Wno_return_type=yes
+else $as_nop
+  gl_cv_warn_c__Wno_return_type=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+  CFLAGS="$gl_save_compiler_FLAGS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_warn_c__Wno_return_type" >&5
+printf "%s\n" "$gl_cv_warn_c__Wno_return_type" >&6; }
+if test "x$gl_cv_warn_c__Wno_return_type" = xyes
+then :
+  as_fn_append GNULIB_TEST_WARN_CFLAGS " -Wno-return-type"
+fi
+
+
+
+fi
+
+# By default, argmatch should fail calling usage (EXIT_FAILURE).
+
+printf "%s\n" "#define ARGMATCH_DIE usage (EXIT_FAILURE)" >>confdefs.h
+
+
+printf "%s\n" "#define ARGMATCH_DIE_DECL void usage (int _e)" >>confdefs.h
+
+
+ac_header_dirent=no
+for ac_hdr in dirent.h sys/ndir.h sys/dir.h ndir.h; do
+  as_ac_Header=`printf "%s\n" "ac_cv_header_dirent_$ac_hdr" | $as_tr_sh`
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_hdr that defines DIR" >&5
+printf %s "checking for $ac_hdr that defines DIR... " >&6; }
+if eval test \${$as_ac_Header+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+#include <$ac_hdr>
+
+int
+main (void)
+{
+if ((DIR *) 0)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  eval "$as_ac_Header=yes"
+else $as_nop
+  eval "$as_ac_Header=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+eval ac_res=\$$as_ac_Header
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+if eval test \"x\$"$as_ac_Header"\" = x"yes"
+then :
+  cat >>confdefs.h <<_ACEOF
+#define `printf "%s\n" "HAVE_$ac_hdr" | $as_tr_cpp` 1
+_ACEOF
+
+ac_header_dirent=$ac_hdr; break
+fi
+
+done
+# Two versions of opendir et al. are in -ldir and -lx on SCO Xenix.
+if test $ac_header_dirent = dirent.h; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing opendir" >&5
+printf %s "checking for library containing opendir... " >&6; }
+if test ${ac_cv_search_opendir+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char opendir ();
+int
+main (void)
+{
+return opendir ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' dir
+do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_search_opendir=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext
+  if test ${ac_cv_search_opendir+y}
+then :
+  break
+fi
+done
+if test ${ac_cv_search_opendir+y}
+then :
+
+else $as_nop
+  ac_cv_search_opendir=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_opendir" >&5
+printf "%s\n" "$ac_cv_search_opendir" >&6; }
+ac_res=$ac_cv_search_opendir
+if test "$ac_res" != no
+then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+fi
+
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing opendir" >&5
+printf %s "checking for library containing opendir... " >&6; }
+if test ${ac_cv_search_opendir+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char opendir ();
+int
+main (void)
+{
+return opendir ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' x
+do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_search_opendir=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext
+  if test ${ac_cv_search_opendir+y}
+then :
+  break
+fi
+done
+if test ${ac_cv_search_opendir+y}
+then :
+
+else $as_nop
+  ac_cv_search_opendir=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_opendir" >&5
+printf "%s\n" "$ac_cv_search_opendir" >&6; }
+ac_res=$ac_cv_search_opendir
+if test "$ac_res" != no
+then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+fi
+
+fi
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether closedir returns void" >&5
+printf %s "checking whether closedir returns void... " >&6; }
+if test ${ac_cv_func_closedir_void+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <$ac_header_dirent>
+
+int
+main (void)
+{
+
+  return closedir(0);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_func_closedir_void=no
+else $as_nop
+  ac_cv_func_closedir_void=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_closedir_void" >&5
+printf "%s\n" "$ac_cv_func_closedir_void" >&6; }
+if test $ac_cv_func_closedir_void = yes; then
+
+printf "%s\n" "#define CLOSEDIR_VOID 1" >>confdefs.h
+
+fi
+
+
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether NLS is requested" >&5
+printf %s "checking whether NLS is requested... " >&6; }
+    # Check whether --enable-nls was given.
+if test ${enable_nls+y}
+then :
+  enableval=$enable_nls; USE_NLS=$enableval
+else $as_nop
+  USE_NLS=yes
+fi
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $USE_NLS" >&5
+printf "%s\n" "$USE_NLS" >&6; }
+
+
+
+
+      GETTEXT_MACRO_VERSION=0.18
+
+
+
+
+# Prepare PATH_SEPARATOR.
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+  # Determine PATH_SEPARATOR by trying to find /bin/sh in a PATH which
+  # contains only /bin. Note that ksh looks also at the FPATH variable,
+  # so we have to set that as well for the test.
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+    && { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+           || PATH_SEPARATOR=';'
+       }
+fi
+
+# Find out how to test for executable files. Don't use a zero-byte file,
+# as systems may use methods other than mode bits to determine executability.
+cat >conf$$.file <<_ASEOF
+#! /bin/sh
+exit 0
+_ASEOF
+chmod +x conf$$.file
+if test -x conf$$.file >/dev/null 2>&1; then
+  ac_executable_p="test -x"
+else
+  ac_executable_p="test -f"
+fi
+rm -f conf$$.file
+
+# Extract the first word of "msgfmt", so it can be a program name with args.
+set dummy msgfmt; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_path_MSGFMT+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  case "$MSGFMT" in
+  [\\/]* | ?:[\\/]*)
+    ac_cv_path_MSGFMT="$MSGFMT" # Let the user override the test with a path.
+    ;;
+  *)
+    ac_save_IFS="$IFS"; IFS=$PATH_SEPARATOR
+    for ac_dir in $PATH; do
+      IFS="$ac_save_IFS"
+      test -z "$ac_dir" && ac_dir=.
+      for ac_exec_ext in '' $ac_executable_extensions; do
+        if $ac_executable_p "$ac_dir/$ac_word$ac_exec_ext"; then
+          echo "$as_me: trying $ac_dir/$ac_word..." >&5
+          if $ac_dir/$ac_word --statistics /dev/null >&5 2>&1 &&
+     (if $ac_dir/$ac_word --statistics /dev/null 2>&1 >/dev/null | grep usage >/dev/null; then exit 1; else exit 0; fi); then
+            ac_cv_path_MSGFMT="$ac_dir/$ac_word$ac_exec_ext"
+            break 2
+          fi
+        fi
+      done
+    done
+    IFS="$ac_save_IFS"
+  test -z "$ac_cv_path_MSGFMT" && ac_cv_path_MSGFMT=":"
+    ;;
+esac
+fi
+MSGFMT="$ac_cv_path_MSGFMT"
+if test "$MSGFMT" != ":"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $MSGFMT" >&5
+printf "%s\n" "$MSGFMT" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+  # Extract the first word of "gmsgfmt", so it can be a program name with args.
+set dummy gmsgfmt; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_path_GMSGFMT+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  case $GMSGFMT in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_GMSGFMT="$GMSGFMT" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_path_GMSGFMT="$as_dir$ac_word$ac_exec_ext"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  test -z "$ac_cv_path_GMSGFMT" && ac_cv_path_GMSGFMT="$MSGFMT"
+  ;;
+esac
+fi
+GMSGFMT=$ac_cv_path_GMSGFMT
+if test -n "$GMSGFMT"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $GMSGFMT" >&5
+printf "%s\n" "$GMSGFMT" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+
+    case `$MSGFMT --version | sed 1q | sed -e 's,^[^0-9]*,,'` in
+    '' | 0.[0-9] | 0.[0-9].* | 0.1[0-4] | 0.1[0-4].*) MSGFMT_015=: ;;
+    *) MSGFMT_015=$MSGFMT ;;
+  esac
+
+  case `$GMSGFMT --version | sed 1q | sed -e 's,^[^0-9]*,,'` in
+    '' | 0.[0-9] | 0.[0-9].* | 0.1[0-4] | 0.1[0-4].*) GMSGFMT_015=: ;;
+    *) GMSGFMT_015=$GMSGFMT ;;
+  esac
+
+
+
+# Prepare PATH_SEPARATOR.
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+  # Determine PATH_SEPARATOR by trying to find /bin/sh in a PATH which
+  # contains only /bin. Note that ksh looks also at the FPATH variable,
+  # so we have to set that as well for the test.
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+    && { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+           || PATH_SEPARATOR=';'
+       }
+fi
+
+# Find out how to test for executable files. Don't use a zero-byte file,
+# as systems may use methods other than mode bits to determine executability.
+cat >conf$$.file <<_ASEOF
+#! /bin/sh
+exit 0
+_ASEOF
+chmod +x conf$$.file
+if test -x conf$$.file >/dev/null 2>&1; then
+  ac_executable_p="test -x"
+else
+  ac_executable_p="test -f"
+fi
+rm -f conf$$.file
+
+# Extract the first word of "xgettext", so it can be a program name with args.
+set dummy xgettext; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_path_XGETTEXT+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  case "$XGETTEXT" in
+  [\\/]* | ?:[\\/]*)
+    ac_cv_path_XGETTEXT="$XGETTEXT" # Let the user override the test with a path.
+    ;;
+  *)
+    ac_save_IFS="$IFS"; IFS=$PATH_SEPARATOR
+    for ac_dir in $PATH; do
+      IFS="$ac_save_IFS"
+      test -z "$ac_dir" && ac_dir=.
+      for ac_exec_ext in '' $ac_executable_extensions; do
+        if $ac_executable_p "$ac_dir/$ac_word$ac_exec_ext"; then
+          echo "$as_me: trying $ac_dir/$ac_word..." >&5
+          if $ac_dir/$ac_word --omit-header --copyright-holder= --msgid-bugs-address= /dev/null >&5 2>&1 &&
+     (if $ac_dir/$ac_word --omit-header --copyright-holder= --msgid-bugs-address= /dev/null 2>&1 >/dev/null | grep usage >/dev/null; then exit 1; else exit 0; fi); then
+            ac_cv_path_XGETTEXT="$ac_dir/$ac_word$ac_exec_ext"
+            break 2
+          fi
+        fi
+      done
+    done
+    IFS="$ac_save_IFS"
+  test -z "$ac_cv_path_XGETTEXT" && ac_cv_path_XGETTEXT=":"
+    ;;
+esac
+fi
+XGETTEXT="$ac_cv_path_XGETTEXT"
+if test "$XGETTEXT" != ":"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $XGETTEXT" >&5
+printf "%s\n" "$XGETTEXT" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+    rm -f messages.po
+
+    case `$XGETTEXT --version | sed 1q | sed -e 's,^[^0-9]*,,'` in
+    '' | 0.[0-9] | 0.[0-9].* | 0.1[0-4] | 0.1[0-4].*) XGETTEXT_015=: ;;
+    *) XGETTEXT_015=$XGETTEXT ;;
+  esac
+
+
+
+# Prepare PATH_SEPARATOR.
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+  # Determine PATH_SEPARATOR by trying to find /bin/sh in a PATH which
+  # contains only /bin. Note that ksh looks also at the FPATH variable,
+  # so we have to set that as well for the test.
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+    && { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+           || PATH_SEPARATOR=';'
+       }
+fi
+
+# Find out how to test for executable files. Don't use a zero-byte file,
+# as systems may use methods other than mode bits to determine executability.
+cat >conf$$.file <<_ASEOF
+#! /bin/sh
+exit 0
+_ASEOF
+chmod +x conf$$.file
+if test -x conf$$.file >/dev/null 2>&1; then
+  ac_executable_p="test -x"
+else
+  ac_executable_p="test -f"
+fi
+rm -f conf$$.file
+
+# Extract the first word of "msgmerge", so it can be a program name with args.
+set dummy msgmerge; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_path_MSGMERGE+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  case "$MSGMERGE" in
+  [\\/]* | ?:[\\/]*)
+    ac_cv_path_MSGMERGE="$MSGMERGE" # Let the user override the test with a path.
+    ;;
+  *)
+    ac_save_IFS="$IFS"; IFS=$PATH_SEPARATOR
+    for ac_dir in $PATH; do
+      IFS="$ac_save_IFS"
+      test -z "$ac_dir" && ac_dir=.
+      for ac_exec_ext in '' $ac_executable_extensions; do
+        if $ac_executable_p "$ac_dir/$ac_word$ac_exec_ext"; then
+          echo "$as_me: trying $ac_dir/$ac_word..." >&5
+          if $ac_dir/$ac_word --update -q /dev/null /dev/null >&5 2>&1; then
+            ac_cv_path_MSGMERGE="$ac_dir/$ac_word$ac_exec_ext"
+            break 2
+          fi
+        fi
+      done
+    done
+    IFS="$ac_save_IFS"
+  test -z "$ac_cv_path_MSGMERGE" && ac_cv_path_MSGMERGE=":"
+    ;;
+esac
+fi
+MSGMERGE="$ac_cv_path_MSGMERGE"
+if test "$MSGMERGE" != ":"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $MSGMERGE" >&5
+printf "%s\n" "$MSGMERGE" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+        test -n "$localedir" || localedir='${datadir}/locale'
+
+
+    test -n "${XGETTEXT_EXTRA_OPTIONS+set}" || XGETTEXT_EXTRA_OPTIONS=
+
+
+  ac_config_commands="$ac_config_commands po-directories"
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for CFPreferencesCopyAppValue" >&5
+printf %s "checking for CFPreferencesCopyAppValue... " >&6; }
+if test ${gt_cv_func_CFPreferencesCopyAppValue+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gt_save_LIBS="$LIBS"
+     LIBS="$LIBS -Wl,-framework -Wl,CoreFoundation"
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <CoreFoundation/CFPreferences.h>
+int
+main (void)
+{
+CFPreferencesCopyAppValue(NULL, NULL)
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gt_cv_func_CFPreferencesCopyAppValue=yes
+else $as_nop
+  gt_cv_func_CFPreferencesCopyAppValue=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+     LIBS="$gt_save_LIBS"
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_func_CFPreferencesCopyAppValue" >&5
+printf "%s\n" "$gt_cv_func_CFPreferencesCopyAppValue" >&6; }
+  if test $gt_cv_func_CFPreferencesCopyAppValue = yes; then
+
+printf "%s\n" "#define HAVE_CFPREFERENCESCOPYAPPVALUE 1" >>confdefs.h
+
+  fi
+                    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for CFLocaleCopyPreferredLanguages" >&5
+printf %s "checking for CFLocaleCopyPreferredLanguages... " >&6; }
+if test ${gt_cv_func_CFLocaleCopyPreferredLanguages+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gt_save_LIBS="$LIBS"
+     LIBS="$LIBS -Wl,-framework -Wl,CoreFoundation"
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <CoreFoundation/CFLocale.h>
+int
+main (void)
+{
+CFLocaleCopyPreferredLanguages();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gt_cv_func_CFLocaleCopyPreferredLanguages=yes
+else $as_nop
+  gt_cv_func_CFLocaleCopyPreferredLanguages=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+     LIBS="$gt_save_LIBS"
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_func_CFLocaleCopyPreferredLanguages" >&5
+printf "%s\n" "$gt_cv_func_CFLocaleCopyPreferredLanguages" >&6; }
+  if test $gt_cv_func_CFLocaleCopyPreferredLanguages = yes; then
+
+printf "%s\n" "#define HAVE_CFLOCALECOPYPREFERREDLANGUAGES 1" >>confdefs.h
+
+  fi
+  INTL_MACOSX_LIBS=
+  if test $gt_cv_func_CFPreferencesCopyAppValue = yes \
+     || test $gt_cv_func_CFLocaleCopyPreferredLanguages = yes; then
+    INTL_MACOSX_LIBS="-Wl,-framework -Wl,CoreFoundation"
+  fi
+
+
+
+
+
+
+  LIBINTL=
+  LTLIBINTL=
+  POSUB=
+
+    case " $gt_needs " in
+    *" need-formatstring-macros "*) gt_api_version=3 ;;
+    *" need-ngettext "*) gt_api_version=2 ;;
+    *) gt_api_version=1 ;;
+  esac
+  gt_func_gnugettext_libc="gt_cv_func_gnugettext${gt_api_version}_libc"
+  gt_func_gnugettext_libintl="gt_cv_func_gnugettext${gt_api_version}_libintl"
+
+    if test "$USE_NLS" = "yes"; then
+    gt_use_preinstalled_gnugettext=no
+
+
+        if test $gt_api_version -ge 3; then
+          gt_revision_test_code='
+#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
+#define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
+#endif
+typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
+'
+        else
+          gt_revision_test_code=
+        fi
+        if test $gt_api_version -ge 2; then
+          gt_expression_test_code=' + * ngettext ("", "", 0)'
+        else
+          gt_expression_test_code=
+        fi
+
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for GNU gettext in libc" >&5
+printf %s "checking for GNU gettext in libc... " >&6; }
+if eval test \${$gt_func_gnugettext_libc+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <libintl.h>
+$gt_revision_test_code
+extern int _nl_msg_cat_cntr;
+extern int *_nl_domain_bindings;
+
+int
+main (void)
+{
+
+bindtextdomain ("", "");
+return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_domain_bindings
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  eval "$gt_func_gnugettext_libc=yes"
+else $as_nop
+  eval "$gt_func_gnugettext_libc=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+eval ac_res=\$$gt_func_gnugettext_libc
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+
+        if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "yes"; }; then
+
+
+
+
+
+          am_save_CPPFLAGS="$CPPFLAGS"
+
+  for element in $INCICONV; do
+    haveit=
+    for x in $CPPFLAGS; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+      if test "X$x" = "X$element"; then
+        haveit=yes
+        break
+      fi
+    done
+    if test -z "$haveit"; then
+      CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }$element"
+    fi
+  done
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for iconv" >&5
+printf %s "checking for iconv... " >&6; }
+if test ${am_cv_func_iconv+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    am_cv_func_iconv="no, consider installing GNU libiconv"
+    am_cv_lib_iconv=no
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdlib.h>
+#include <iconv.h>
+
+int
+main (void)
+{
+iconv_t cd = iconv_open("","");
+           iconv(cd,NULL,NULL,NULL,NULL);
+           iconv_close(cd);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  am_cv_func_iconv=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+    if test "$am_cv_func_iconv" != yes; then
+      am_save_LIBS="$LIBS"
+      LIBS="$LIBS $LIBICONV"
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdlib.h>
+#include <iconv.h>
+
+int
+main (void)
+{
+iconv_t cd = iconv_open("","");
+             iconv(cd,NULL,NULL,NULL,NULL);
+             iconv_close(cd);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  am_cv_lib_iconv=yes
+        am_cv_func_iconv=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+      LIBS="$am_save_LIBS"
+    fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_func_iconv" >&5
+printf "%s\n" "$am_cv_func_iconv" >&6; }
+  if test "$am_cv_func_iconv" = yes; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working iconv" >&5
+printf %s "checking for working iconv... " >&6; }
+if test ${am_cv_func_iconv_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  am_save_LIBS="$LIBS"
+      if test $am_cv_lib_iconv = yes; then
+        LIBS="$LIBS $LIBICONV"
+      fi
+      am_cv_func_iconv_works=no
+      for ac_iconv_const in '' 'const'; do
+        if test "$cross_compiling" = yes
+then :
+  case "$host_os" in
+             aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
+             *)            am_cv_func_iconv_works="guessing yes" ;;
+           esac
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <iconv.h>
+#include <string.h>
+
+#ifndef ICONV_CONST
+# define ICONV_CONST $ac_iconv_const
+#endif
+
+int
+main (void)
+{
+int result = 0;
+  /* Test against AIX 5.1...7.2 bug: Failures are not distinguishable from
+     successful returns.  This is even documented in
+     <https://www.ibm.com/support/knowledgecenter/ssw_aix_72/i_bostechref/iconv.html> */
+  {
+    iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
+    if (cd_utf8_to_88591 != (iconv_t)(-1))
+      {
+        static ICONV_CONST char input[] = "\342\202\254"; /* EURO SIGN */
+        char buf[10];
+        ICONV_CONST char *inptr = input;
+        size_t inbytesleft = strlen (input);
+        char *outptr = buf;
+        size_t outbytesleft = sizeof (buf);
+        size_t res = iconv (cd_utf8_to_88591,
+                            &inptr, &inbytesleft,
+                            &outptr, &outbytesleft);
+        if (res == 0)
+          result |= 1;
+        iconv_close (cd_utf8_to_88591);
+      }
+  }
+  /* Test against Solaris 10 bug: Failures are not distinguishable from
+     successful returns.  */
+  {
+    iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646");
+    if (cd_ascii_to_88591 != (iconv_t)(-1))
+      {
+        static ICONV_CONST char input[] = "\263";
+        char buf[10];
+        ICONV_CONST char *inptr = input;
+        size_t inbytesleft = strlen (input);
+        char *outptr = buf;
+        size_t outbytesleft = sizeof (buf);
+        size_t res = iconv (cd_ascii_to_88591,
+                            &inptr, &inbytesleft,
+                            &outptr, &outbytesleft);
+        if (res == 0)
+          result |= 2;
+        iconv_close (cd_ascii_to_88591);
+      }
+  }
+  /* Test against AIX 6.1..7.1 bug: Buffer overrun.  */
+  {
+    iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1");
+    if (cd_88591_to_utf8 != (iconv_t)(-1))
+      {
+        static ICONV_CONST char input[] = "\304";
+        static char buf[2] = { (char)0xDE, (char)0xAD };
+        ICONV_CONST char *inptr = input;
+        size_t inbytesleft = 1;
+        char *outptr = buf;
+        size_t outbytesleft = 1;
+        size_t res = iconv (cd_88591_to_utf8,
+                            &inptr, &inbytesleft,
+                            &outptr, &outbytesleft);
+        if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD)
+          result |= 4;
+        iconv_close (cd_88591_to_utf8);
+      }
+  }
+#if 0 /* This bug could be worked around by the caller.  */
+  /* Test against HP-UX 11.11 bug: Positive return value instead of 0.  */
+  {
+    iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
+    if (cd_88591_to_utf8 != (iconv_t)(-1))
+      {
+        static ICONV_CONST char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
+        char buf[50];
+        ICONV_CONST char *inptr = input;
+        size_t inbytesleft = strlen (input);
+        char *outptr = buf;
+        size_t outbytesleft = sizeof (buf);
+        size_t res = iconv (cd_88591_to_utf8,
+                            &inptr, &inbytesleft,
+                            &outptr, &outbytesleft);
+        if ((int)res > 0)
+          result |= 8;
+        iconv_close (cd_88591_to_utf8);
+      }
+  }
+#endif
+  /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
+     provided.  */
+  {
+    /* Try standardized names.  */
+    iconv_t cd1 = iconv_open ("UTF-8", "EUC-JP");
+    /* Try IRIX, OSF/1 names.  */
+    iconv_t cd2 = iconv_open ("UTF-8", "eucJP");
+    /* Try AIX names.  */
+    iconv_t cd3 = iconv_open ("UTF-8", "IBM-eucJP");
+    /* Try HP-UX names.  */
+    iconv_t cd4 = iconv_open ("utf8", "eucJP");
+    if (cd1 == (iconv_t)(-1) && cd2 == (iconv_t)(-1)
+        && cd3 == (iconv_t)(-1) && cd4 == (iconv_t)(-1))
+      result |= 16;
+    if (cd1 != (iconv_t)(-1))
+      iconv_close (cd1);
+    if (cd2 != (iconv_t)(-1))
+      iconv_close (cd2);
+    if (cd3 != (iconv_t)(-1))
+      iconv_close (cd3);
+    if (cd4 != (iconv_t)(-1))
+      iconv_close (cd4);
+  }
+  return result;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  am_cv_func_iconv_works=yes
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+        test "$am_cv_func_iconv_works" = no || break
+      done
+      LIBS="$am_save_LIBS"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_func_iconv_works" >&5
+printf "%s\n" "$am_cv_func_iconv_works" >&6; }
+    case "$am_cv_func_iconv_works" in
+      *no) am_func_iconv=no am_cv_lib_iconv=no ;;
+      *)   am_func_iconv=yes ;;
+    esac
+  else
+    am_func_iconv=no am_cv_lib_iconv=no
+  fi
+  if test "$am_func_iconv" = yes; then
+
+printf "%s\n" "#define HAVE_ICONV 1" >>confdefs.h
+
+  fi
+  if test "$am_cv_lib_iconv" = yes; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to link with libiconv" >&5
+printf %s "checking how to link with libiconv... " >&6; }
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LIBICONV" >&5
+printf "%s\n" "$LIBICONV" >&6; }
+  else
+            CPPFLAGS="$am_save_CPPFLAGS"
+    LIBICONV=
+    LTLIBICONV=
+  fi
+
+
+
+
+
+
+
+
+
+
+    use_additional=yes
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+
+    eval additional_includedir=\"$includedir\"
+    eval additional_libdir=\"$libdir\"
+    eval additional_libdir2=\"$exec_prefix/$acl_libdirstem2\"
+    eval additional_libdir3=\"$exec_prefix/$acl_libdirstem3\"
+
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+
+# Check whether --with-libintl-prefix was given.
+if test ${with_libintl_prefix+y}
+then :
+  withval=$with_libintl_prefix;
+    if test "X$withval" = "Xno"; then
+      use_additional=no
+    else
+      if test "X$withval" = "X"; then
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+
+          eval additional_includedir=\"$includedir\"
+          eval additional_libdir=\"$libdir\"
+          eval additional_libdir2=\"$exec_prefix/$acl_libdirstem2\"
+          eval additional_libdir3=\"$exec_prefix/$acl_libdirstem3\"
+
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+      else
+        additional_includedir="$withval/include"
+        additional_libdir="$withval/$acl_libdirstem"
+        additional_libdir2="$withval/$acl_libdirstem2"
+        additional_libdir3="$withval/$acl_libdirstem3"
+      fi
+    fi
+
+fi
+
+  if test "X$additional_libdir2" = "X$additional_libdir"; then
+    additional_libdir2=
+  fi
+  if test "X$additional_libdir3" = "X$additional_libdir"; then
+    additional_libdir3=
+  fi
+      LIBINTL=
+  LTLIBINTL=
+  INCINTL=
+  LIBINTL_PREFIX=
+      HAVE_LIBINTL=
+  rpathdirs=
+  ltrpathdirs=
+  names_already_handled=
+  names_next_round='intl '
+  while test -n "$names_next_round"; do
+    names_this_round="$names_next_round"
+    names_next_round=
+    for name in $names_this_round; do
+      already_handled=
+      for n in $names_already_handled; do
+        if test "$n" = "$name"; then
+          already_handled=yes
+          break
+        fi
+      done
+      if test -z "$already_handled"; then
+        names_already_handled="$names_already_handled $name"
+                        uppername=`echo "$name" | sed -e 'y|abcdefghijklmnopqrstuvwxyz./+-|ABCDEFGHIJKLMNOPQRSTUVWXYZ____|'`
+        eval value=\"\$HAVE_LIB$uppername\"
+        if test -n "$value"; then
+          if test "$value" = yes; then
+            eval value=\"\$LIB$uppername\"
+            test -z "$value" || LIBINTL="${LIBINTL}${LIBINTL:+ }$value"
+            eval value=\"\$LTLIB$uppername\"
+            test -z "$value" || LTLIBINTL="${LTLIBINTL}${LTLIBINTL:+ }$value"
+          else
+                                    :
+          fi
+        else
+                              found_dir=
+          found_la=
+          found_so=
+          found_a=
+          eval libname=\"$acl_libname_spec\"    # typically: libname=lib$name
+          if test -n "$acl_shlibext"; then
+            shrext=".$acl_shlibext"             # typically: shrext=.so
+          else
+            shrext=
+          fi
+          if test $use_additional = yes; then
+            for additional_libdir_variable in additional_libdir additional_libdir2 additional_libdir3; do
+              if test "X$found_dir" = "X"; then
+                eval dir=\$$additional_libdir_variable
+                if test -n "$dir"; then
+                                                      if test -n "$acl_shlibext"; then
+                    if test -f "$dir/$libname$shrext" && acl_is_expected_elfclass < "$dir/$libname$shrext"; then
+                      found_dir="$dir"
+                      found_so="$dir/$libname$shrext"
+                    else
+                      if test "$acl_library_names_spec" = '$libname$shrext$versuffix'; then
+                        ver=`(cd "$dir" && \
+                              for f in "$libname$shrext".*; do echo "$f"; done \
+                              | sed -e "s,^$libname$shrext\\\\.,," \
+                              | sort -t '.' -n -r -k1,1 -k2,2 -k3,3 -k4,4 -k5,5 \
+                              | sed 1q ) 2>/dev/null`
+                        if test -n "$ver" && test -f "$dir/$libname$shrext.$ver" && acl_is_expected_elfclass < "$dir/$libname$shrext.$ver"; then
+                          found_dir="$dir"
+                          found_so="$dir/$libname$shrext.$ver"
+                        fi
+                      else
+                        eval library_names=\"$acl_library_names_spec\"
+                        for f in $library_names; do
+                          if test -f "$dir/$f" && acl_is_expected_elfclass < "$dir/$f"; then
+                            found_dir="$dir"
+                            found_so="$dir/$f"
+                            break
+                          fi
+                        done
+                      fi
+                    fi
+                  fi
+                                    if test "X$found_dir" = "X"; then
+                    if test -f "$dir/$libname.$acl_libext" && ${AR-ar} -p "$dir/$libname.$acl_libext" | acl_is_expected_elfclass; then
+                      found_dir="$dir"
+                      found_a="$dir/$libname.$acl_libext"
+                    fi
+                  fi
+                  if test "X$found_dir" != "X"; then
+                    if test -f "$dir/$libname.la"; then
+                      found_la="$dir/$libname.la"
+                    fi
+                  fi
+                fi
+              fi
+            done
+          fi
+          if test "X$found_dir" = "X"; then
+            for x in $LDFLAGS $LTLIBINTL; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+              case "$x" in
+                -L*)
+                  dir=`echo "X$x" | sed -e 's/^X-L//'`
+                                    if test -n "$acl_shlibext"; then
+                    if test -f "$dir/$libname$shrext" && acl_is_expected_elfclass < "$dir/$libname$shrext"; then
+                      found_dir="$dir"
+                      found_so="$dir/$libname$shrext"
+                    else
+                      if test "$acl_library_names_spec" = '$libname$shrext$versuffix'; then
+                        ver=`(cd "$dir" && \
+                              for f in "$libname$shrext".*; do echo "$f"; done \
+                              | sed -e "s,^$libname$shrext\\\\.,," \
+                              | sort -t '.' -n -r -k1,1 -k2,2 -k3,3 -k4,4 -k5,5 \
+                              | sed 1q ) 2>/dev/null`
+                        if test -n "$ver" && test -f "$dir/$libname$shrext.$ver" && acl_is_expected_elfclass < "$dir/$libname$shrext.$ver"; then
+                          found_dir="$dir"
+                          found_so="$dir/$libname$shrext.$ver"
+                        fi
+                      else
+                        eval library_names=\"$acl_library_names_spec\"
+                        for f in $library_names; do
+                          if test -f "$dir/$f" && acl_is_expected_elfclass < "$dir/$f"; then
+                            found_dir="$dir"
+                            found_so="$dir/$f"
+                            break
+                          fi
+                        done
+                      fi
+                    fi
+                  fi
+                                    if test "X$found_dir" = "X"; then
+                    if test -f "$dir/$libname.$acl_libext" && ${AR-ar} -p "$dir/$libname.$acl_libext" | acl_is_expected_elfclass; then
+                      found_dir="$dir"
+                      found_a="$dir/$libname.$acl_libext"
+                    fi
+                  fi
+                  if test "X$found_dir" != "X"; then
+                    if test -f "$dir/$libname.la"; then
+                      found_la="$dir/$libname.la"
+                    fi
+                  fi
+                  ;;
+              esac
+              if test "X$found_dir" != "X"; then
+                break
+              fi
+            done
+          fi
+          if test "X$found_dir" != "X"; then
+                        LTLIBINTL="${LTLIBINTL}${LTLIBINTL:+ }-L$found_dir -l$name"
+            if test "X$found_so" != "X"; then
+                                                        if test "$enable_rpath" = no \
+                 || test "X$found_dir" = "X/usr/$acl_libdirstem" \
+                 || test "X$found_dir" = "X/usr/$acl_libdirstem2" \
+                 || test "X$found_dir" = "X/usr/$acl_libdirstem3"; then
+                                LIBINTL="${LIBINTL}${LIBINTL:+ }$found_so"
+              else
+                                                                                haveit=
+                for x in $ltrpathdirs; do
+                  if test "X$x" = "X$found_dir"; then
+                    haveit=yes
+                    break
+                  fi
+                done
+                if test -z "$haveit"; then
+                  ltrpathdirs="$ltrpathdirs $found_dir"
+                fi
+                                if test "$acl_hardcode_direct" = yes; then
+                                                      LIBINTL="${LIBINTL}${LIBINTL:+ }$found_so"
+                else
+                  if test -n "$acl_hardcode_libdir_flag_spec" && test "$acl_hardcode_minus_L" = no; then
+                                                            LIBINTL="${LIBINTL}${LIBINTL:+ }$found_so"
+                                                            haveit=
+                    for x in $rpathdirs; do
+                      if test "X$x" = "X$found_dir"; then
+                        haveit=yes
+                        break
+                      fi
+                    done
+                    if test -z "$haveit"; then
+                      rpathdirs="$rpathdirs $found_dir"
+                    fi
+                  else
+                                                                                haveit=
+                    for x in $LDFLAGS $LIBINTL; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+                      if test "X$x" = "X-L$found_dir"; then
+                        haveit=yes
+                        break
+                      fi
+                    done
+                    if test -z "$haveit"; then
+                      LIBINTL="${LIBINTL}${LIBINTL:+ }-L$found_dir"
+                    fi
+                    if test "$acl_hardcode_minus_L" != no; then
+                                                                                        LIBINTL="${LIBINTL}${LIBINTL:+ }$found_so"
+                    else
+                                                                                                                                                                                LIBINTL="${LIBINTL}${LIBINTL:+ }-l$name"
+                    fi
+                  fi
+                fi
+              fi
+            else
+              if test "X$found_a" != "X"; then
+                                LIBINTL="${LIBINTL}${LIBINTL:+ }$found_a"
+              else
+                                                LIBINTL="${LIBINTL}${LIBINTL:+ }-L$found_dir -l$name"
+              fi
+            fi
+                        additional_includedir=
+            case "$found_dir" in
+              */$acl_libdirstem | */$acl_libdirstem/)
+                basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem/"'*$,,'`
+                if test "$name" = 'intl'; then
+                  LIBINTL_PREFIX="$basedir"
+                fi
+                additional_includedir="$basedir/include"
+                ;;
+              */$acl_libdirstem2 | */$acl_libdirstem2/)
+                basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem2/"'*$,,'`
+                if test "$name" = 'intl'; then
+                  LIBINTL_PREFIX="$basedir"
+                fi
+                additional_includedir="$basedir/include"
+                ;;
+              */$acl_libdirstem3 | */$acl_libdirstem3/)
+                basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem3/"'*$,,'`
+                if test "$name" = 'intl'; then
+                  LIBINTL_PREFIX="$basedir"
+                fi
+                additional_includedir="$basedir/include"
+                ;;
+            esac
+            if test "X$additional_includedir" != "X"; then
+                                                                                                                if test "X$additional_includedir" != "X/usr/include"; then
+                haveit=
+                if test "X$additional_includedir" = "X/usr/local/include"; then
+                  if test -n "$GCC"; then
+                    case $host_os in
+                      linux* | gnu* | k*bsd*-gnu) haveit=yes;;
+                    esac
+                  fi
+                fi
+                if test -z "$haveit"; then
+                  for x in $CPPFLAGS $INCINTL; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+                    if test "X$x" = "X-I$additional_includedir"; then
+                      haveit=yes
+                      break
+                    fi
+                  done
+                  if test -z "$haveit"; then
+                    if test -d "$additional_includedir"; then
+                                            INCINTL="${INCINTL}${INCINTL:+ }-I$additional_includedir"
+                    fi
+                  fi
+                fi
+              fi
+            fi
+                        if test -n "$found_la"; then
+                                                        save_libdir="$libdir"
+              case "$found_la" in
+                */* | *\\*) . "$found_la" ;;
+                *) . "./$found_la" ;;
+              esac
+              libdir="$save_libdir"
+                            for dep in $dependency_libs; do
+                case "$dep" in
+                  -L*)
+                    dependency_libdir=`echo "X$dep" | sed -e 's/^X-L//'`
+                                                                                                                                                                if test "X$dependency_libdir" != "X/usr/$acl_libdirstem" \
+                       && test "X$dependency_libdir" != "X/usr/$acl_libdirstem2" \
+                       && test "X$dependency_libdir" != "X/usr/$acl_libdirstem3"; then
+                      haveit=
+                      if test "X$dependency_libdir" = "X/usr/local/$acl_libdirstem" \
+                         || test "X$dependency_libdir" = "X/usr/local/$acl_libdirstem2" \
+                         || test "X$dependency_libdir" = "X/usr/local/$acl_libdirstem3"; then
+                        if test -n "$GCC"; then
+                          case $host_os in
+                            linux* | gnu* | k*bsd*-gnu) haveit=yes;;
+                          esac
+                        fi
+                      fi
+                      if test -z "$haveit"; then
+                        haveit=
+                        for x in $LDFLAGS $LIBINTL; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+                          if test "X$x" = "X-L$dependency_libdir"; then
+                            haveit=yes
+                            break
+                          fi
+                        done
+                        if test -z "$haveit"; then
+                          if test -d "$dependency_libdir"; then
+                                                        LIBINTL="${LIBINTL}${LIBINTL:+ }-L$dependency_libdir"
+                          fi
+                        fi
+                        haveit=
+                        for x in $LDFLAGS $LTLIBINTL; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+                          if test "X$x" = "X-L$dependency_libdir"; then
+                            haveit=yes
+                            break
+                          fi
+                        done
+                        if test -z "$haveit"; then
+                          if test -d "$dependency_libdir"; then
+                                                        LTLIBINTL="${LTLIBINTL}${LTLIBINTL:+ }-L$dependency_libdir"
+                          fi
+                        fi
+                      fi
+                    fi
+                    ;;
+                  -R*)
+                    dir=`echo "X$dep" | sed -e 's/^X-R//'`
+                    if test "$enable_rpath" != no; then
+                                                                  haveit=
+                      for x in $rpathdirs; do
+                        if test "X$x" = "X$dir"; then
+                          haveit=yes
+                          break
+                        fi
+                      done
+                      if test -z "$haveit"; then
+                        rpathdirs="$rpathdirs $dir"
+                      fi
+                                                                  haveit=
+                      for x in $ltrpathdirs; do
+                        if test "X$x" = "X$dir"; then
+                          haveit=yes
+                          break
+                        fi
+                      done
+                      if test -z "$haveit"; then
+                        ltrpathdirs="$ltrpathdirs $dir"
+                      fi
+                    fi
+                    ;;
+                  -l*)
+                                                                                                                                                                dep=`echo "X$dep" | sed -e 's/^X-l//'`
+                    if test "X$dep" != Xc \
+                       || case $host_os in
+                            linux* | gnu* | k*bsd*-gnu) false ;;
+                            *)                          true ;;
+                          esac; then
+                      names_next_round="$names_next_round $dep"
+                    fi
+                    ;;
+                  *.la)
+                                                                                names_next_round="$names_next_round "`echo "X$dep" | sed -e 's,^X.*/,,' -e 's,^lib,,' -e 's,\.la$,,'`
+                    ;;
+                  *)
+                                        LIBINTL="${LIBINTL}${LIBINTL:+ }$dep"
+                    LTLIBINTL="${LTLIBINTL}${LTLIBINTL:+ }$dep"
+                    ;;
+                esac
+              done
+            fi
+          else
+                                                            LIBINTL="${LIBINTL}${LIBINTL:+ }-l$name"
+            LTLIBINTL="${LTLIBINTL}${LTLIBINTL:+ }-l$name"
+          fi
+        fi
+      fi
+    done
+  done
+  if test "X$rpathdirs" != "X"; then
+    if test -n "$acl_hardcode_libdir_separator"; then
+                        alldirs=
+      for found_dir in $rpathdirs; do
+        alldirs="${alldirs}${alldirs:+$acl_hardcode_libdir_separator}$found_dir"
+      done
+            acl_save_libdir="$libdir"
+      libdir="$alldirs"
+      eval flag=\"$acl_hardcode_libdir_flag_spec\"
+      libdir="$acl_save_libdir"
+      LIBINTL="${LIBINTL}${LIBINTL:+ }$flag"
+    else
+            for found_dir in $rpathdirs; do
+        acl_save_libdir="$libdir"
+        libdir="$found_dir"
+        eval flag=\"$acl_hardcode_libdir_flag_spec\"
+        libdir="$acl_save_libdir"
+        LIBINTL="${LIBINTL}${LIBINTL:+ }$flag"
+      done
+    fi
+  fi
+  if test "X$ltrpathdirs" != "X"; then
+            for found_dir in $ltrpathdirs; do
+      LTLIBINTL="${LTLIBINTL}${LTLIBINTL:+ }-R$found_dir"
+    done
+  fi
+
+
+
+
+
+          { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for GNU gettext in libintl" >&5
+printf %s "checking for GNU gettext in libintl... " >&6; }
+if eval test \${$gt_func_gnugettext_libintl+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gt_save_CPPFLAGS="$CPPFLAGS"
+            CPPFLAGS="$CPPFLAGS $INCINTL"
+            gt_save_LIBS="$LIBS"
+            LIBS="$LIBS $LIBINTL"
+                        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <libintl.h>
+$gt_revision_test_code
+extern int _nl_msg_cat_cntr;
+extern
+#ifdef __cplusplus
+"C"
+#endif
+const char *_nl_expand_alias (const char *);
+
+int
+main (void)
+{
+
+bindtextdomain ("", "");
+return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_alias ("")
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  eval "$gt_func_gnugettext_libintl=yes"
+else $as_nop
+  eval "$gt_func_gnugettext_libintl=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+                        if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" != yes; } && test -n "$LIBICONV"; then
+              LIBS="$LIBS $LIBICONV"
+              cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <libintl.h>
+$gt_revision_test_code
+extern int _nl_msg_cat_cntr;
+extern
+#ifdef __cplusplus
+"C"
+#endif
+const char *_nl_expand_alias (const char *);
+
+int
+main (void)
+{
+
+bindtextdomain ("", "");
+return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_alias ("")
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  LIBINTL="$LIBINTL $LIBICONV"
+                 LTLIBINTL="$LTLIBINTL $LTLIBICONV"
+                 eval "$gt_func_gnugettext_libintl=yes"
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+            fi
+            CPPFLAGS="$gt_save_CPPFLAGS"
+            LIBS="$gt_save_LIBS"
+fi
+eval ac_res=\$$gt_func_gnugettext_libintl
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+        fi
+
+                                        if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" = "yes"; } \
+           || { { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; } \
+                && test "$PACKAGE" != gettext-runtime \
+                && test "$PACKAGE" != gettext-tools; }; then
+          gt_use_preinstalled_gnugettext=yes
+        else
+                    LIBINTL=
+          LTLIBINTL=
+          INCINTL=
+        fi
+
+
+
+    if test -n "$INTL_MACOSX_LIBS"; then
+      if test "$gt_use_preinstalled_gnugettext" = "yes" \
+         || test "$nls_cv_use_gnu_gettext" = "yes"; then
+                LIBINTL="$LIBINTL $INTL_MACOSX_LIBS"
+        LTLIBINTL="$LTLIBINTL $INTL_MACOSX_LIBS"
+      fi
+    fi
+
+    if test "$gt_use_preinstalled_gnugettext" = "yes" \
+       || test "$nls_cv_use_gnu_gettext" = "yes"; then
+
+printf "%s\n" "#define ENABLE_NLS 1" >>confdefs.h
+
+    else
+      USE_NLS=no
+    fi
+  fi
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether to use NLS" >&5
+printf %s "checking whether to use NLS... " >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $USE_NLS" >&5
+printf "%s\n" "$USE_NLS" >&6; }
+  if test "$USE_NLS" = "yes"; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking where the gettext function comes from" >&5
+printf %s "checking where the gettext function comes from... " >&6; }
+    if test "$gt_use_preinstalled_gnugettext" = "yes"; then
+      if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
+        gt_source="external libintl"
+      else
+        gt_source="libc"
+      fi
+    else
+      gt_source="included intl directory"
+    fi
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_source" >&5
+printf "%s\n" "$gt_source" >&6; }
+  fi
+
+  if test "$USE_NLS" = "yes"; then
+
+    if test "$gt_use_preinstalled_gnugettext" = "yes"; then
+      if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to link with libintl" >&5
+printf %s "checking how to link with libintl... " >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LIBINTL" >&5
+printf "%s\n" "$LIBINTL" >&6; }
+
+  for element in $INCINTL; do
+    haveit=
+    for x in $CPPFLAGS; do
+
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  eval x=\"$x\"
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+
+      if test "X$x" = "X$element"; then
+        haveit=yes
+        break
+      fi
+    done
+    if test -z "$haveit"; then
+      CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }$element"
+    fi
+  done
+
+      fi
+
+
+printf "%s\n" "#define HAVE_GETTEXT 1" >>confdefs.h
+
+
+printf "%s\n" "#define HAVE_DCGETTEXT 1" >>confdefs.h
+
+    fi
+
+        POSUB=po
+  fi
+
+
+
+    INTLLIBS="$LIBINTL"
+
+
+
+
+
+
+
+ if test "$ac_use_included_regex" = yes; then
+  USE_INCLUDED_REGEX_TRUE=
+  USE_INCLUDED_REGEX_FALSE='#'
+else
+  USE_INCLUDED_REGEX_TRUE='#'
+  USE_INCLUDED_REGEX_FALSE=
+fi
+
+if test "$ac_use_included_regex" = no; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: Included lib/regex.c not used" >&5
+printf "%s\n" "$as_me: WARNING: Included lib/regex.c not used" >&2;}
+fi
+
+
+  # Check whether --enable-perl-regexp was given.
+if test ${enable_perl_regexp+y}
+then :
+  enableval=$enable_perl_regexp; case $enableval in
+       yes|no) test_pcre=$enableval;;
+       *) as_fn_error $? "invalid value $enableval for --disable-perl-regexp" "$LINENO" 5;;
+     esac
+else $as_nop
+  test_pcre=maybe
+fi
+
+
+
+
+  use_pcre=no
+
+  if test $test_pcre != no; then
+
+pkg_failed=no
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for PCRE" >&5
+printf %s "checking for PCRE... " >&6; }
+
+if test -n "$PCRE_CFLAGS"; then
+    pkg_cv_PCRE_CFLAGS="$PCRE_CFLAGS"
+ elif test -n "$PKG_CONFIG"; then
+    if test -n "$PKG_CONFIG" && \
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libpcre\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "libpcre") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+  pkg_cv_PCRE_CFLAGS=`$PKG_CONFIG --cflags "libpcre" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes
+else
+  pkg_failed=yes
+fi
+ else
+    pkg_failed=untried
+fi
+if test -n "$PCRE_LIBS"; then
+    pkg_cv_PCRE_LIBS="$PCRE_LIBS"
+ elif test -n "$PKG_CONFIG"; then
+    if test -n "$PKG_CONFIG" && \
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libpcre\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "libpcre") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+  pkg_cv_PCRE_LIBS=`$PKG_CONFIG --libs "libpcre" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes
+else
+  pkg_failed=yes
+fi
+ else
+    pkg_failed=untried
+fi
+
+
+
+if test $pkg_failed = yes; then
+   	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+
+if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
+        _pkg_short_errors_supported=yes
+else
+        _pkg_short_errors_supported=no
+fi
+        if test $_pkg_short_errors_supported = yes; then
+	        PCRE_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "libpcre" 2>&1`
+        else
+	        PCRE_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "libpcre" 2>&1`
+        fi
+	# Put the nasty error message in config.log where it belongs
+	echo "$PCRE_PKG_ERRORS" >&5
+
+	: ${PCRE_LIBS=-lpcre}
+elif test $pkg_failed = untried; then
+     	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+	: ${PCRE_LIBS=-lpcre}
+else
+	PCRE_CFLAGS=$pkg_cv_PCRE_CFLAGS
+	PCRE_LIBS=$pkg_cv_PCRE_LIBS
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+
+fi
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pcre_compile" >&5
+printf %s "checking for pcre_compile... " >&6; }
+if test ${pcre_cv_have_pcre_compile+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  pcre_saved_CFLAGS=$CFLAGS
+       pcre_saved_LIBS=$LIBS
+       CFLAGS="$CFLAGS $PCRE_CFLAGS"
+       LIBS="$PCRE_LIBS $LIBS"
+       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pcre.h>
+
+int
+main (void)
+{
+pcre *p = pcre_compile (0, 0, 0, 0, 0);
+              return !p;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  pcre_cv_have_pcre_compile=yes
+else $as_nop
+  pcre_cv_have_pcre_compile=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+       CFLAGS=$pcre_saved_CFLAGS
+       LIBS=$pcre_saved_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $pcre_cv_have_pcre_compile" >&5
+printf "%s\n" "$pcre_cv_have_pcre_compile" >&6; }
+
+    if test "$pcre_cv_have_pcre_compile" = yes; then
+      use_pcre=yes
+    elif test $test_pcre = maybe; then
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: GNU grep will be built without pcre support." >&5
+printf "%s\n" "$as_me: WARNING: GNU grep will be built without pcre support." >&2;}
+    else
+      as_fn_error $? "pcre support not available" "$LINENO" 5
+    fi
+  fi
+
+  if test $use_pcre = yes; then
+
+printf "%s\n" "#define HAVE_LIBPCRE 1" >>confdefs.h
+
+  else
+    PCRE_CFLAGS=
+    PCRE_LIBS=
+  fi
+
+ if test $use_pcre = yes; then
+  USE_PCRE_TRUE=
+  USE_PCRE_FALSE='#'
+else
+  USE_PCRE_TRUE='#'
+  USE_PCRE_FALSE=
+fi
+
+
+case $host_os in
+  mingw*) suffix=w32 ;;
+  *) suffix=posix ;;
+esac
+COLORIZE_SOURCE=colorize-$suffix.c
+
+
+ac_config_files="$ac_config_files Makefile lib/Makefile src/Makefile tests/Makefile po/Makefile.in doc/Makefile gnulib-tests/Makefile"
+
+cat >confcache <<\_ACEOF
+# This file is a shell script that caches the results of configure
+# tests run on this system so they can be shared between configure
+# scripts and configure runs, see configure's option --config-cache.
+# It is not useful on other systems.  If it contains results you don't
+# want to keep, you may remove or edit it.
+#
+# config.status only pays attention to the cache file if you give it
+# the --recheck option to rerun configure.
+#
+# `ac_cv_env_foo' variables (set or unset) will be overridden when
+# loading this file, other *unset* `ac_cv_foo' will be assigned the
+# following values.
+
+_ACEOF
+
+# The following way of writing the cache mishandles newlines in values,
+# but we know of no workaround that is simple, portable, and efficient.
+# So, we kill variables containing newlines.
+# Ultrix sh set writes to stderr and can't be redirected directly,
+# and sets the high bit in the cache file unless we assign to the vars.
+(
+  for ac_var in `(set) 2>&1 | sed -n 's/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'`; do
+    eval ac_val=\$$ac_var
+    case $ac_val in #(
+    *${as_nl}*)
+      case $ac_var in #(
+      *_cv_*) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
+printf "%s\n" "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
+      esac
+      case $ac_var in #(
+      _ | IFS | as_nl) ;; #(
+      BASH_ARGV | BASH_SOURCE) eval $ac_var= ;; #(
+      *) { eval $ac_var=; unset $ac_var;} ;;
+      esac ;;
+    esac
+  done
+
+  (set) 2>&1 |
+    case $as_nl`(ac_space=' '; set) 2>&1` in #(
+    *${as_nl}ac_space=\ *)
+      # `set' does not quote correctly, so add quotes: double-quote
+      # substitution turns \\\\ into \\, and sed turns \\ into \.
+      sed -n \
+	"s/'/'\\\\''/g;
+	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\\2'/p"
+      ;; #(
+    *)
+      # `set' quotes correctly as required by POSIX, so do not add quotes.
+      sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
+      ;;
+    esac |
+    sort
+) |
+  sed '
+     /^ac_cv_env_/b end
+     t clear
+     :clear
+     s/^\([^=]*\)=\(.*[{}].*\)$/test ${\1+y} || &/
+     t end
+     s/^\([^=]*\)=\(.*\)$/\1=${\1=\2}/
+     :end' >>confcache
+if diff "$cache_file" confcache >/dev/null 2>&1; then :; else
+  if test -w "$cache_file"; then
+    if test "x$cache_file" != "x/dev/null"; then
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: updating cache $cache_file" >&5
+printf "%s\n" "$as_me: updating cache $cache_file" >&6;}
+      if test ! -f "$cache_file" || test -h "$cache_file"; then
+	cat confcache >"$cache_file"
+      else
+        case $cache_file in #(
+        */* | ?:*)
+	  mv -f confcache "$cache_file"$$ &&
+	  mv -f "$cache_file"$$ "$cache_file" ;; #(
+        *)
+	  mv -f confcache "$cache_file" ;;
+	esac
+      fi
+    fi
+  else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: not updating unwritable cache $cache_file" >&5
+printf "%s\n" "$as_me: not updating unwritable cache $cache_file" >&6;}
+  fi
+fi
+rm -f confcache
+
+test "x$prefix" = xNONE && prefix=$ac_default_prefix
+# Let make expand exec_prefix.
+test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
+
+DEFS=-DHAVE_CONFIG_H
+
+ac_libobjs=
+ac_ltlibobjs=
+U=
+for ac_i in : $LIBOBJS; do test "x$ac_i" = x: && continue
+  # 1. Remove the extension, and $U if already installed.
+  ac_script='s/\$U\././;s/\.o$//;s/\.obj$//'
+  ac_i=`printf "%s\n" "$ac_i" | sed "$ac_script"`
+  # 2. Prepend LIBOBJDIR.  When used with automake>=1.10 LIBOBJDIR
+  #    will be set to the directory where LIBOBJS objects are built.
+  as_fn_append ac_libobjs " \${LIBOBJDIR}$ac_i\$U.$ac_objext"
+  as_fn_append ac_ltlibobjs " \${LIBOBJDIR}$ac_i"'$U.lo'
+done
+LIBOBJS=$ac_libobjs
+
+LTLIBOBJS=$ac_ltlibobjs
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking that generated files are newer than configure" >&5
+printf %s "checking that generated files are newer than configure... " >&6; }
+   if test -n "$am_sleep_pid"; then
+     # Hide warnings about reused PIDs.
+     wait $am_sleep_pid 2>/dev/null
+   fi
+   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: done" >&5
+printf "%s\n" "done" >&6; }
+ if test -n "$EXEEXT"; then
+  am__EXEEXT_TRUE=
+  am__EXEEXT_FALSE='#'
+else
+  am__EXEEXT_TRUE='#'
+  am__EXEEXT_FALSE=
+fi
+
+if test -z "${AMDEP_TRUE}" && test -z "${AMDEP_FALSE}"; then
+  as_fn_error $? "conditional \"AMDEP\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${am__fastdepCC_TRUE}" && test -z "${am__fastdepCC_FALSE}"; then
+  as_fn_error $? "conditional \"am__fastdepCC\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${GL_COND_LIBTOOL_TRUE}" && test -z "${GL_COND_LIBTOOL_FALSE}"; then
+  as_fn_error $? "conditional \"GL_COND_LIBTOOL\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${GL_GENERATE_ALLOCA_H_TRUE}" && test -z "${GL_GENERATE_ALLOCA_H_FALSE}"; then
+  as_fn_error $? "conditional \"GL_GENERATE_ALLOCA_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${GL_GENERATE_ERRNO_H_TRUE}" && test -z "${GL_GENERATE_ERRNO_H_FALSE}"; then
+  as_fn_error $? "conditional \"GL_GENERATE_ERRNO_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${GL_GENERATE_FNMATCH_H_TRUE}" && test -z "${GL_GENERATE_FNMATCH_H_FALSE}"; then
+  as_fn_error $? "conditional \"GL_GENERATE_FNMATCH_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${GL_GENERATE_FNMATCH_H_TRUE}" && test -z "${GL_GENERATE_FNMATCH_H_FALSE}"; then
+  as_fn_error $? "conditional \"GL_GENERATE_FNMATCH_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${GL_GENERATE_ICONV_H_TRUE}" && test -z "${GL_GENERATE_ICONV_H_FALSE}"; then
+  as_fn_error $? "conditional \"GL_GENERATE_ICONV_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${GL_GENERATE_ICONV_H_TRUE}" && test -z "${GL_GENERATE_ICONV_H_FALSE}"; then
+  as_fn_error $? "conditional \"GL_GENERATE_ICONV_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${GL_GENERATE_ICONV_H_TRUE}" && test -z "${GL_GENERATE_ICONV_H_FALSE}"; then
+  as_fn_error $? "conditional \"GL_GENERATE_ICONV_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${GL_GENERATE_LIMITS_H_TRUE}" && test -z "${GL_GENERATE_LIMITS_H_FALSE}"; then
+  as_fn_error $? "conditional \"GL_GENERATE_LIMITS_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${GL_GENERATE_LIMITS_H_TRUE}" && test -z "${GL_GENERATE_LIMITS_H_FALSE}"; then
+  as_fn_error $? "conditional \"GL_GENERATE_LIMITS_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${GL_GENERATE_STDINT_H_TRUE}" && test -z "${GL_GENERATE_STDINT_H_FALSE}"; then
+  as_fn_error $? "conditional \"GL_GENERATE_STDINT_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${GL_GENERATE_STDDEF_H_TRUE}" && test -z "${GL_GENERATE_STDDEF_H_FALSE}"; then
+  as_fn_error $? "conditional \"GL_GENERATE_STDDEF_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+CONFIG_INCLUDE=config.h
+
+if test -z "${GL_GENERATE_SIGSEGV_H_TRUE}" && test -z "${GL_GENERATE_SIGSEGV_H_FALSE}"; then
+  as_fn_error $? "conditional \"GL_GENERATE_SIGSEGV_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${GL_GENERATE_STDALIGN_H_TRUE}" && test -z "${GL_GENERATE_STDALIGN_H_FALSE}"; then
+  as_fn_error $? "conditional \"GL_GENERATE_STDALIGN_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${GL_GENERATE_STDARG_H_TRUE}" && test -z "${GL_GENERATE_STDARG_H_FALSE}"; then
+  as_fn_error $? "conditional \"GL_GENERATE_STDARG_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${GL_GENERATE_STDBOOL_H_TRUE}" && test -z "${GL_GENERATE_STDBOOL_H_FALSE}"; then
+  as_fn_error $? "conditional \"GL_GENERATE_STDBOOL_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${LIBUNISTRING_COMPILE_UNISTR_U8_MBTOUCR_TRUE}" && test -z "${LIBUNISTRING_COMPILE_UNISTR_U8_MBTOUCR_FALSE}"; then
+  as_fn_error $? "conditional \"LIBUNISTRING_COMPILE_UNISTR_U8_MBTOUCR\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${LIBUNISTRING_COMPILE_UNISTR_U8_UCTOMB_TRUE}" && test -z "${LIBUNISTRING_COMPILE_UNISTR_U8_UCTOMB_FALSE}"; then
+  as_fn_error $? "conditional \"LIBUNISTRING_COMPILE_UNISTR_U8_UCTOMB\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${LIBUNISTRING_COMPILE_UNIWIDTH_WIDTH_TRUE}" && test -z "${LIBUNISTRING_COMPILE_UNIWIDTH_WIDTH_FALSE}"; then
+  as_fn_error $? "conditional \"LIBUNISTRING_COMPILE_UNIWIDTH_WIDTH\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+
+    gl_libobjs=
+    gl_ltlibobjs=
+    if test -n "$gl_LIBOBJS"; then
+      # Remove the extension.
+      sed_drop_objext='s/\.o$//;s/\.obj$//'
+      for i in `for i in $gl_LIBOBJS; do echo "$i"; done | sed -e "$sed_drop_objext" | sort | uniq`; do
+        gl_libobjs="$gl_libobjs $i.$ac_objext"
+        gl_ltlibobjs="$gl_ltlibobjs $i.lo"
+      done
+    fi
+    gl_LIBOBJS=$gl_libobjs
+
+    gl_LTLIBOBJS=$gl_ltlibobjs
+
+
+if test -z "${GL_GENERATE_FLOAT_H_TRUE}" && test -z "${GL_GENERATE_FLOAT_H_FALSE}"; then
+  as_fn_error $? "conditional \"GL_GENERATE_FLOAT_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+
+if test -z "${GL_GENERATE_NETINET_IN_H_TRUE}" && test -z "${GL_GENERATE_NETINET_IN_H_FALSE}"; then
+  as_fn_error $? "conditional \"GL_GENERATE_NETINET_IN_H\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+
+
+    gltests_libobjs=
+    gltests_ltlibobjs=
+    if test -n "$gltests_LIBOBJS"; then
+      # Remove the extension.
+      sed_drop_objext='s/\.o$//;s/\.obj$//'
+      for i in `for i in $gltests_LIBOBJS; do echo "$i"; done | sed -e "$sed_drop_objext" | sort | uniq`; do
+        gltests_libobjs="$gltests_libobjs $i.$ac_objext"
+        gltests_ltlibobjs="$gltests_ltlibobjs $i.lo"
+      done
+    fi
+    gltests_LIBOBJS=$gltests_libobjs
+
+    gltests_LTLIBOBJS=$gltests_ltlibobjs
+
+
+if test -z "${HAVE_PERL_TRUE}" && test -z "${HAVE_PERL_FALSE}"; then
+  as_fn_error $? "conditional \"HAVE_PERL\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${USE_INCLUDED_REGEX_TRUE}" && test -z "${USE_INCLUDED_REGEX_FALSE}"; then
+  as_fn_error $? "conditional \"USE_INCLUDED_REGEX\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${USE_PCRE_TRUE}" && test -z "${USE_PCRE_FALSE}"; then
+  as_fn_error $? "conditional \"USE_PCRE\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+
+: "${CONFIG_STATUS=./config.status}"
+ac_write_fail=0
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files $CONFIG_STATUS"
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: creating $CONFIG_STATUS" >&5
+printf "%s\n" "$as_me: creating $CONFIG_STATUS" >&6;}
+as_write_fail=0
+cat >$CONFIG_STATUS <<_ASEOF || as_write_fail=1
+#! $SHELL
+# Generated by $as_me.
+# Run this file to recreate the current configuration.
+# Compiler output produced by configure, useful for debugging
+# configure, is in config.log if it exists.
+
+debug=false
+ac_cs_recheck=false
+ac_cs_silent=false
+
+SHELL=\${CONFIG_SHELL-$SHELL}
+export SHELL
+_ASEOF
+cat >>$CONFIG_STATUS <<\_ASEOF || as_write_fail=1
+## -------------------- ##
+## M4sh Initialization. ##
+## -------------------- ##
+
+# Be more Bourne compatible
+DUALCASE=1; export DUALCASE # for MKS sh
+as_nop=:
+if test ${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
+then :
+  emulate sh
+  NULLCMD=:
+  # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else $as_nop
+  case `(set -o) 2>/dev/null` in #(
+  *posix*) :
+    set -o posix ;; #(
+  *) :
+     ;;
+esac
+fi
+
+
+
+# Reset variables that may have inherited troublesome values from
+# the environment.
+
+# IFS needs to be set, to space, tab, and newline, in precisely that order.
+# (If _AS_PATH_WALK were called with IFS unset, it would have the
+# side effect of setting IFS to empty, thus disabling word splitting.)
+# Quoting is to prevent editors from complaining about space-tab.
+as_nl='
+'
+export as_nl
+IFS=" ""	$as_nl"
+
+PS1='$ '
+PS2='> '
+PS4='+ '
+
+# Ensure predictable behavior from utilities with locale-dependent output.
+LC_ALL=C
+export LC_ALL
+LANGUAGE=C
+export LANGUAGE
+
+# We cannot yet rely on "unset" to work, but we need these variables
+# to be unset--not just set to an empty or harmless value--now, to
+# avoid bugs in old shells (e.g. pre-3.0 UWIN ksh).  This construct
+# also avoids known problems related to "unset" and subshell syntax
+# in other old shells (e.g. bash 2.01 and pdksh 5.2.14).
+for as_var in BASH_ENV ENV MAIL MAILPATH CDPATH
+do eval test \${$as_var+y} \
+  && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
+done
+
+# Ensure that fds 0, 1, and 2 are open.
+if (exec 3>&0) 2>/dev/null; then :; else exec 0</dev/null; fi
+if (exec 3>&1) 2>/dev/null; then :; else exec 1>/dev/null; fi
+if (exec 3>&2)            ; then :; else exec 2>/dev/null; fi
+
+# The user is always right.
+if ${PATH_SEPARATOR+false} :; then
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && {
+    (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 ||
+      PATH_SEPARATOR=';'
+  }
+fi
+
+
+# Find who we are.  Look in the path if we contain no directory separator.
+as_myself=
+case $0 in #((
+  *[\\/]* ) as_myself=$0 ;;
+  *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    test -r "$as_dir$0" && as_myself=$as_dir$0 && break
+  done
+IFS=$as_save_IFS
+
+     ;;
+esac
+# We did not find ourselves, most probably we were run as `sh COMMAND'
+# in which case we are not to be found in the path.
+if test "x$as_myself" = x; then
+  as_myself=$0
+fi
+if test ! -f "$as_myself"; then
+  printf "%s\n" "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
+  exit 1
+fi
+
+
+
+# as_fn_error STATUS ERROR [LINENO LOG_FD]
+# ----------------------------------------
+# Output "`basename $0`: error: ERROR" to stderr. If LINENO and LOG_FD are
+# provided, also output the error to LOG_FD, referencing LINENO. Then exit the
+# script with STATUS, using 1 if that was 0.
+as_fn_error ()
+{
+  as_status=$1; test $as_status -eq 0 && as_status=1
+  if test "$4"; then
+    as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
+  fi
+  printf "%s\n" "$as_me: error: $2" >&2
+  as_fn_exit $as_status
+} # as_fn_error
+
+
+
+# as_fn_set_status STATUS
+# -----------------------
+# Set $? to STATUS, without forking.
+as_fn_set_status ()
+{
+  return $1
+} # as_fn_set_status
+
+# as_fn_exit STATUS
+# -----------------
+# Exit the shell with STATUS, even in a "trap 0" or "set -e" context.
+as_fn_exit ()
+{
+  set +e
+  as_fn_set_status $1
+  exit $1
+} # as_fn_exit
+
+# as_fn_unset VAR
+# ---------------
+# Portably unset VAR.
+as_fn_unset ()
+{
+  { eval $1=; unset $1;}
+}
+as_unset=as_fn_unset
+
+# as_fn_append VAR VALUE
+# ----------------------
+# Append the text in VALUE to the end of the definition contained in VAR. Take
+# advantage of any shell optimizations that allow amortized linear growth over
+# repeated appends, instead of the typical quadratic growth present in naive
+# implementations.
+if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null
+then :
+  eval 'as_fn_append ()
+  {
+    eval $1+=\$2
+  }'
+else $as_nop
+  as_fn_append ()
+  {
+    eval $1=\$$1\$2
+  }
+fi # as_fn_append
+
+# as_fn_arith ARG...
+# ------------------
+# Perform arithmetic evaluation on the ARGs, and store the result in the
+# global $as_val. Take advantage of shells that can avoid forks. The arguments
+# must be portable across $(()) and expr.
+if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null
+then :
+  eval 'as_fn_arith ()
+  {
+    as_val=$(( $* ))
+  }'
+else $as_nop
+  as_fn_arith ()
+  {
+    as_val=`expr "$@" || test $? -eq 1`
+  }
+fi # as_fn_arith
+
+
+if expr a : '\(a\)' >/dev/null 2>&1 &&
+   test "X`expr 00001 : '.*\(...\)'`" = X001; then
+  as_expr=expr
+else
+  as_expr=false
+fi
+
+if (basename -- /) >/dev/null 2>&1 && test "X`basename -- / 2>&1`" = "X/"; then
+  as_basename=basename
+else
+  as_basename=false
+fi
+
+if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then
+  as_dirname=dirname
+else
+  as_dirname=false
+fi
+
+as_me=`$as_basename -- "$0" ||
+$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
+	 X"$0" : 'X\(//\)$' \| \
+	 X"$0" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X/"$0" |
+    sed '/^.*\/\([^/][^/]*\)\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+
+# Avoid depending upon Character Ranges.
+as_cr_letters='abcdefghijklmnopqrstuvwxyz'
+as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+as_cr_Letters=$as_cr_letters$as_cr_LETTERS
+as_cr_digits='0123456789'
+as_cr_alnum=$as_cr_Letters$as_cr_digits
+
+
+# Determine whether it's possible to make 'echo' print without a newline.
+# These variables are no longer used directly by Autoconf, but are AC_SUBSTed
+# for compatibility with existing Makefiles.
+ECHO_C= ECHO_N= ECHO_T=
+case `echo -n x` in #(((((
+-n*)
+  case `echo 'xy\c'` in
+  *c*) ECHO_T='	';;	# ECHO_T is single tab character.
+  xy)  ECHO_C='\c';;
+  *)   echo `echo ksh88 bug on AIX 6.1` > /dev/null
+       ECHO_T='	';;
+  esac;;
+*)
+  ECHO_N='-n';;
+esac
+
+# For backward compatibility with old third-party macros, we provide
+# the shell variables $as_echo and $as_echo_n.  New code should use
+# AS_ECHO(["message"]) and AS_ECHO_N(["message"]), respectively.
+as_echo='printf %s\n'
+as_echo_n='printf %s'
+
+rm -f conf$$ conf$$.exe conf$$.file
+if test -d conf$$.dir; then
+  rm -f conf$$.dir/conf$$.file
+else
+  rm -f conf$$.dir
+  mkdir conf$$.dir 2>/dev/null
+fi
+if (echo >conf$$.file) 2>/dev/null; then
+  if ln -s conf$$.file conf$$ 2>/dev/null; then
+    as_ln_s='ln -s'
+    # ... but there are two gotchas:
+    # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
+    # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
+    # In both cases, we have to default to `cp -pR'.
+    ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
+      as_ln_s='cp -pR'
+  elif ln conf$$.file conf$$ 2>/dev/null; then
+    as_ln_s=ln
+  else
+    as_ln_s='cp -pR'
+  fi
+else
+  as_ln_s='cp -pR'
+fi
+rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file
+rmdir conf$$.dir 2>/dev/null
+
+
+# as_fn_mkdir_p
+# -------------
+# Create "$as_dir" as a directory, including parents if necessary.
+as_fn_mkdir_p ()
+{
+
+  case $as_dir in #(
+  -*) as_dir=./$as_dir;;
+  esac
+  test -d "$as_dir" || eval $as_mkdir_p || {
+    as_dirs=
+    while :; do
+      case $as_dir in #(
+      *\'*) as_qdir=`printf "%s\n" "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
+      *) as_qdir=$as_dir;;
+      esac
+      as_dirs="'$as_qdir' $as_dirs"
+      as_dir=`$as_dirname -- "$as_dir" ||
+$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$as_dir" : 'X\(//\)[^/]' \| \
+	 X"$as_dir" : 'X\(//\)$' \| \
+	 X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X"$as_dir" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+      test -d "$as_dir" && break
+    done
+    test -z "$as_dirs" || eval "mkdir $as_dirs"
+  } || test -d "$as_dir" || as_fn_error $? "cannot create directory $as_dir"
+
+
+} # as_fn_mkdir_p
+if mkdir -p . 2>/dev/null; then
+  as_mkdir_p='mkdir -p "$as_dir"'
+else
+  test -d ./-p && rmdir ./-p
+  as_mkdir_p=false
+fi
+
+
+# as_fn_executable_p FILE
+# -----------------------
+# Test if FILE is an executable regular file.
+as_fn_executable_p ()
+{
+  test -f "$1" && test -x "$1"
+} # as_fn_executable_p
+as_test_x='test -x'
+as_executable_p=as_fn_executable_p
+
+# Sed expression to map a string onto a valid CPP name.
+as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
+
+# Sed expression to map a string onto a valid variable name.
+as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
+
+
+exec 6>&1
+## ----------------------------------- ##
+## Main body of $CONFIG_STATUS script. ##
+## ----------------------------------- ##
+_ASEOF
+test $as_write_fail = 0 && chmod +x $CONFIG_STATUS || ac_write_fail=1
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+# Save the log message, to keep $0 and so on meaningful, and to
+# report actual input values of CONFIG_FILES etc. instead of their
+# values after options handling.
+ac_log="
+This file was extended by GNU grep $as_me 3.7, which was
+generated by GNU Autoconf 2.71.  Invocation command line was
+
+  CONFIG_FILES    = $CONFIG_FILES
+  CONFIG_HEADERS  = $CONFIG_HEADERS
+  CONFIG_LINKS    = $CONFIG_LINKS
+  CONFIG_COMMANDS = $CONFIG_COMMANDS
+  $ $0 $@
+
+on `(hostname || uname -n) 2>/dev/null | sed 1q`
+"
+
+_ACEOF
+
+case $ac_config_files in *"
+"*) set x $ac_config_files; shift; ac_config_files=$*;;
+esac
+
+case $ac_config_headers in *"
+"*) set x $ac_config_headers; shift; ac_config_headers=$*;;
+esac
+
+
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+# Files that config.status was made for.
+config_files="$ac_config_files"
+config_headers="$ac_config_headers"
+config_links="$ac_config_links"
+config_commands="$ac_config_commands"
+
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+ac_cs_usage="\
+\`$as_me' instantiates files and other configuration actions
+from templates according to the current configuration.  Unless the files
+and actions are specified as TAGs, all are instantiated by default.
+
+Usage: $0 [OPTION]... [TAG]...
+
+  -h, --help       print this help, then exit
+  -V, --version    print version number and configuration settings, then exit
+      --config     print configuration, then exit
+  -q, --quiet, --silent
+                   do not print progress messages
+  -d, --debug      don't remove temporary files
+      --recheck    update $as_me by reconfiguring in the same conditions
+      --file=FILE[:TEMPLATE]
+                   instantiate the configuration file FILE
+      --header=FILE[:TEMPLATE]
+                   instantiate the configuration header FILE
+
+Configuration files:
+$config_files
+
+Configuration headers:
+$config_headers
+
+Configuration links:
+$config_links
+
+Configuration commands:
+$config_commands
+
+Report bugs to <bug-grep@gnu.org>.
+GNU grep home page: <https://www.gnu.org/software/grep/>.
+General help using GNU software: <https://www.gnu.org/gethelp/>."
+
+_ACEOF
+ac_cs_config=`printf "%s\n" "$ac_configure_args" | sed "$ac_safe_unquote"`
+ac_cs_config_escaped=`printf "%s\n" "$ac_cs_config" | sed "s/^ //; s/'/'\\\\\\\\''/g"`
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+ac_cs_config='$ac_cs_config_escaped'
+ac_cs_version="\\
+GNU grep config.status 3.7
+configured by $0, generated by GNU Autoconf 2.71,
+  with options \\"\$ac_cs_config\\"
+
+Copyright (C) 2021 Free Software Foundation, Inc.
+This config.status script is free software; the Free Software Foundation
+gives unlimited permission to copy, distribute and modify it."
+
+ac_pwd='$ac_pwd'
+srcdir='$srcdir'
+INSTALL='$INSTALL'
+MKDIR_P='$MKDIR_P'
+AWK='$AWK'
+test -n "\$AWK" || AWK=awk
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+# The default lists apply if the user does not specify any file.
+ac_need_defaults=:
+while test $# != 0
+do
+  case $1 in
+  --*=?*)
+    ac_option=`expr "X$1" : 'X\([^=]*\)='`
+    ac_optarg=`expr "X$1" : 'X[^=]*=\(.*\)'`
+    ac_shift=:
+    ;;
+  --*=)
+    ac_option=`expr "X$1" : 'X\([^=]*\)='`
+    ac_optarg=
+    ac_shift=:
+    ;;
+  *)
+    ac_option=$1
+    ac_optarg=$2
+    ac_shift=shift
+    ;;
+  esac
+
+  case $ac_option in
+  # Handling of the options.
+  -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
+    ac_cs_recheck=: ;;
+  --version | --versio | --versi | --vers | --ver | --ve | --v | -V )
+    printf "%s\n" "$ac_cs_version"; exit ;;
+  --config | --confi | --conf | --con | --co | --c )
+    printf "%s\n" "$ac_cs_config"; exit ;;
+  --debug | --debu | --deb | --de | --d | -d )
+    debug=: ;;
+  --file | --fil | --fi | --f )
+    $ac_shift
+    case $ac_optarg in
+    *\'*) ac_optarg=`printf "%s\n" "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    '') as_fn_error $? "missing file argument" ;;
+    esac
+    as_fn_append CONFIG_FILES " '$ac_optarg'"
+    ac_need_defaults=false;;
+  --header | --heade | --head | --hea )
+    $ac_shift
+    case $ac_optarg in
+    *\'*) ac_optarg=`printf "%s\n" "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    esac
+    as_fn_append CONFIG_HEADERS " '$ac_optarg'"
+    ac_need_defaults=false;;
+  --he | --h)
+    # Conflict between --help and --header
+    as_fn_error $? "ambiguous option: \`$1'
+Try \`$0 --help' for more information.";;
+  --help | --hel | -h )
+    printf "%s\n" "$ac_cs_usage"; exit ;;
+  -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+  | -silent | --silent | --silen | --sile | --sil | --si | --s)
+    ac_cs_silent=: ;;
+
+  # This is an error.
+  -*) as_fn_error $? "unrecognized option: \`$1'
+Try \`$0 --help' for more information." ;;
+
+  *) as_fn_append ac_config_targets " $1"
+     ac_need_defaults=false ;;
+
+  esac
+  shift
+done
+
+ac_configure_extra_args=
+
+if $ac_cs_silent; then
+  exec 6>/dev/null
+  ac_configure_extra_args="$ac_configure_extra_args --silent"
+fi
+
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+if \$ac_cs_recheck; then
+  set X $SHELL '$0' $ac_configure_args \$ac_configure_extra_args --no-create --no-recursion
+  shift
+  \printf "%s\n" "running CONFIG_SHELL=$SHELL \$*" >&6
+  CONFIG_SHELL='$SHELL'
+  export CONFIG_SHELL
+  exec "\$@"
+fi
+
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+exec 5>>config.log
+{
+  echo
+  sed 'h;s/./-/g;s/^.../## /;s/...$/ ##/;p;x;p;x' <<_ASBOX
+## Running $as_me. ##
+_ASBOX
+  printf "%s\n" "$ac_log"
+} >&5
+
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+#
+# INIT-COMMANDS
+#
+AMDEP_TRUE="$AMDEP_TRUE" MAKE="${MAKE-make}"
+GNUmakefile=$GNUmakefile
+# Capture the value of obsolete ALL_LINGUAS because we need it to compute
+    # POFILES, UPDATEPOFILES, DUMMYPOFILES, GMOFILES, CATALOGS. But hide it
+    # from automake < 1.5.
+    eval 'OBSOLETE_ALL_LINGUAS''="$ALL_LINGUAS"'
+    # Capture the value of LINGUAS because we need it to compute CATALOGS.
+    LINGUAS="${LINGUAS-%UNSET%}"
+
+
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+
+# Handling of arguments.
+for ac_config_target in $ac_config_targets
+do
+  case $ac_config_target in
+    "config.h") CONFIG_HEADERS="$CONFIG_HEADERS config.h:config.hin" ;;
+    "depfiles") CONFIG_COMMANDS="$CONFIG_COMMANDS depfiles" ;;
+    "$GNUmakefile") CONFIG_LINKS="$CONFIG_LINKS $GNUmakefile:$GNUmakefile" ;;
+    "po-directories") CONFIG_COMMANDS="$CONFIG_COMMANDS po-directories" ;;
+    "Makefile") CONFIG_FILES="$CONFIG_FILES Makefile" ;;
+    "lib/Makefile") CONFIG_FILES="$CONFIG_FILES lib/Makefile" ;;
+    "src/Makefile") CONFIG_FILES="$CONFIG_FILES src/Makefile" ;;
+    "tests/Makefile") CONFIG_FILES="$CONFIG_FILES tests/Makefile" ;;
+    "po/Makefile.in") CONFIG_FILES="$CONFIG_FILES po/Makefile.in" ;;
+    "doc/Makefile") CONFIG_FILES="$CONFIG_FILES doc/Makefile" ;;
+    "gnulib-tests/Makefile") CONFIG_FILES="$CONFIG_FILES gnulib-tests/Makefile" ;;
+
+  *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;;
+  esac
+done
+
+
+# If the user did not use the arguments to specify the items to instantiate,
+# then the envvar interface is used.  Set only those that are not.
+# We use the long form for the default assignment because of an extremely
+# bizarre bug on SunOS 4.1.3.
+if $ac_need_defaults; then
+  test ${CONFIG_FILES+y} || CONFIG_FILES=$config_files
+  test ${CONFIG_HEADERS+y} || CONFIG_HEADERS=$config_headers
+  test ${CONFIG_LINKS+y} || CONFIG_LINKS=$config_links
+  test ${CONFIG_COMMANDS+y} || CONFIG_COMMANDS=$config_commands
+fi
+
+# Have a temporary directory for convenience.  Make it in the build tree
+# simply because there is no reason against having it here, and in addition,
+# creating and moving files from /tmp can sometimes cause problems.
+# Hook for its removal unless debugging.
+# Note that there is a small window in which the directory will not be cleaned:
+# after its creation but before its name has been assigned to `$tmp'.
+$debug ||
+{
+  tmp= ac_tmp=
+  trap 'exit_status=$?
+  : "${ac_tmp:=$tmp}"
+  { test ! -d "$ac_tmp" || rm -fr "$ac_tmp"; } && exit $exit_status
+' 0
+  trap 'as_fn_exit 1' 1 2 13 15
+}
+# Create a (secure) tmp directory for tmp files.
+
+{
+  tmp=`(umask 077 && mktemp -d "./confXXXXXX") 2>/dev/null` &&
+  test -d "$tmp"
+}  ||
+{
+  tmp=./conf$$-$RANDOM
+  (umask 077 && mkdir "$tmp")
+} || as_fn_error $? "cannot create a temporary directory in ." "$LINENO" 5
+ac_tmp=$tmp
+
+# Set up the scripts for CONFIG_FILES section.
+# No need to generate them if there are no CONFIG_FILES.
+# This happens for instance with `./config.status config.h'.
+if test -n "$CONFIG_FILES"; then
+
+
+ac_cr=`echo X | tr X '\015'`
+# On cygwin, bash can eat \r inside `` if the user requested igncr.
+# But we know of no other shell where ac_cr would be empty at this
+# point, so we can use a bashism as a fallback.
+if test "x$ac_cr" = x; then
+  eval ac_cr=\$\'\\r\'
+fi
+ac_cs_awk_cr=`$AWK 'BEGIN { print "a\rb" }' </dev/null 2>/dev/null`
+if test "$ac_cs_awk_cr" = "a${ac_cr}b"; then
+  ac_cs_awk_cr='\\r'
+else
+  ac_cs_awk_cr=$ac_cr
+fi
+
+echo 'BEGIN {' >"$ac_tmp/subs1.awk" &&
+_ACEOF
+
+
+{
+  echo "cat >conf$$subs.awk <<_ACEOF" &&
+  echo "$ac_subst_vars" | sed 's/.*/&!$&$ac_delim/' &&
+  echo "_ACEOF"
+} >conf$$subs.sh ||
+  as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+ac_delim_num=`echo "$ac_subst_vars" | grep -c '^'`
+ac_delim='%!_!# '
+for ac_last_try in false false false false false :; do
+  . ./conf$$subs.sh ||
+    as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+
+  ac_delim_n=`sed -n "s/.*$ac_delim\$/X/p" conf$$subs.awk | grep -c X`
+  if test $ac_delim_n = $ac_delim_num; then
+    break
+  elif $ac_last_try; then
+    as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+  else
+    ac_delim="$ac_delim!$ac_delim _$ac_delim!! "
+  fi
+done
+rm -f conf$$subs.sh
+
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+cat >>"\$ac_tmp/subs1.awk" <<\\_ACAWK &&
+_ACEOF
+sed -n '
+h
+s/^/S["/; s/!.*/"]=/
+p
+g
+s/^[^!]*!//
+:repl
+t repl
+s/'"$ac_delim"'$//
+t delim
+:nl
+h
+s/\(.\{148\}\)..*/\1/
+t more1
+s/["\\]/\\&/g; s/^/"/; s/$/\\n"\\/
+p
+n
+b repl
+:more1
+s/["\\]/\\&/g; s/^/"/; s/$/"\\/
+p
+g
+s/.\{148\}//
+t nl
+:delim
+h
+s/\(.\{148\}\)..*/\1/
+t more2
+s/["\\]/\\&/g; s/^/"/; s/$/"/
+p
+b
+:more2
+s/["\\]/\\&/g; s/^/"/; s/$/"\\/
+p
+g
+s/.\{148\}//
+t delim
+' <conf$$subs.awk | sed '
+/^[^""]/{
+  N
+  s/\n//
+}
+' >>$CONFIG_STATUS || ac_write_fail=1
+rm -f conf$$subs.awk
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+_ACAWK
+cat >>"\$ac_tmp/subs1.awk" <<_ACAWK &&
+  for (key in S) S_is_set[key] = 1
+  FS = ""
+
+}
+{
+  line = $ 0
+  nfields = split(line, field, "@")
+  substed = 0
+  len = length(field[1])
+  for (i = 2; i < nfields; i++) {
+    key = field[i]
+    keylen = length(key)
+    if (S_is_set[key]) {
+      value = S[key]
+      line = substr(line, 1, len) "" value "" substr(line, len + keylen + 3)
+      len += length(value) + length(field[++i])
+      substed = 1
+    } else
+      len += 1 + keylen
+  }
+
+  print line
+}
+
+_ACAWK
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+if sed "s/$ac_cr//" < /dev/null > /dev/null 2>&1; then
+  sed "s/$ac_cr\$//; s/$ac_cr/$ac_cs_awk_cr/g"
+else
+  cat
+fi < "$ac_tmp/subs1.awk" > "$ac_tmp/subs.awk" \
+  || as_fn_error $? "could not setup config files machinery" "$LINENO" 5
+_ACEOF
+
+# VPATH may cause trouble with some makes, so we remove sole $(srcdir),
+# ${srcdir} and @srcdir@ entries from VPATH if srcdir is ".", strip leading and
+# trailing colons and then remove the whole line if VPATH becomes empty
+# (actually we leave an empty line to preserve line numbers).
+if test "x$srcdir" = x.; then
+  ac_vpsub='/^[	 ]*VPATH[	 ]*=[	 ]*/{
+h
+s///
+s/^/:/
+s/[	 ]*$/:/
+s/:\$(srcdir):/:/g
+s/:\${srcdir}:/:/g
+s/:@srcdir@:/:/g
+s/^:*//
+s/:*$//
+x
+s/\(=[	 ]*\).*/\1/
+G
+s/\n//
+s/^[^=]*=[	 ]*$//
+}'
+fi
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+fi # test -n "$CONFIG_FILES"
+
+# Set up the scripts for CONFIG_HEADERS section.
+# No need to generate them if there are no CONFIG_HEADERS.
+# This happens for instance with `./config.status Makefile'.
+if test -n "$CONFIG_HEADERS"; then
+cat >"$ac_tmp/defines.awk" <<\_ACAWK ||
+BEGIN {
+_ACEOF
+
+# Transform confdefs.h into an awk script `defines.awk', embedded as
+# here-document in config.status, that substitutes the proper values into
+# config.h.in to produce config.h.
+
+# Create a delimiter string that does not exist in confdefs.h, to ease
+# handling of long lines.
+ac_delim='%!_!# '
+for ac_last_try in false false :; do
+  ac_tt=`sed -n "/$ac_delim/p" confdefs.h`
+  if test -z "$ac_tt"; then
+    break
+  elif $ac_last_try; then
+    as_fn_error $? "could not make $CONFIG_HEADERS" "$LINENO" 5
+  else
+    ac_delim="$ac_delim!$ac_delim _$ac_delim!! "
+  fi
+done
+
+# For the awk script, D is an array of macro values keyed by name,
+# likewise P contains macro parameters if any.  Preserve backslash
+# newline sequences.
+
+ac_word_re=[_$as_cr_Letters][_$as_cr_alnum]*
+sed -n '
+s/.\{148\}/&'"$ac_delim"'/g
+t rset
+:rset
+s/^[	 ]*#[	 ]*define[	 ][	 ]*/ /
+t def
+d
+:def
+s/\\$//
+t bsnl
+s/["\\]/\\&/g
+s/^ \('"$ac_word_re"'\)\(([^()]*)\)[	 ]*\(.*\)/P["\1"]="\2"\
+D["\1"]=" \3"/p
+s/^ \('"$ac_word_re"'\)[	 ]*\(.*\)/D["\1"]=" \2"/p
+d
+:bsnl
+s/["\\]/\\&/g
+s/^ \('"$ac_word_re"'\)\(([^()]*)\)[	 ]*\(.*\)/P["\1"]="\2"\
+D["\1"]=" \3\\\\\\n"\\/p
+t cont
+s/^ \('"$ac_word_re"'\)[	 ]*\(.*\)/D["\1"]=" \2\\\\\\n"\\/p
+t cont
+d
+:cont
+n
+s/.\{148\}/&'"$ac_delim"'/g
+t clear
+:clear
+s/\\$//
+t bsnlc
+s/["\\]/\\&/g; s/^/"/; s/$/"/p
+d
+:bsnlc
+s/["\\]/\\&/g; s/^/"/; s/$/\\\\\\n"\\/p
+b cont
+' <confdefs.h | sed '
+s/'"$ac_delim"'/"\\\
+"/g' >>$CONFIG_STATUS || ac_write_fail=1
+
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+  for (key in D) D_is_set[key] = 1
+  FS = ""
+}
+/^[\t ]*#[\t ]*(define|undef)[\t ]+$ac_word_re([\t (]|\$)/ {
+  line = \$ 0
+  split(line, arg, " ")
+  if (arg[1] == "#") {
+    defundef = arg[2]
+    mac1 = arg[3]
+  } else {
+    defundef = substr(arg[1], 2)
+    mac1 = arg[2]
+  }
+  split(mac1, mac2, "(") #)
+  macro = mac2[1]
+  prefix = substr(line, 1, index(line, defundef) - 1)
+  if (D_is_set[macro]) {
+    # Preserve the white space surrounding the "#".
+    print prefix "define", macro P[macro] D[macro]
+    next
+  } else {
+    # Replace #undef with comments.  This is necessary, for example,
+    # in the case of _POSIX_SOURCE, which is predefined and required
+    # on some systems where configure will not decide to define it.
+    if (defundef == "undef") {
+      print "/*", prefix defundef, macro, "*/"
+      next
+    }
+  }
+}
+{ print }
+_ACAWK
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+  as_fn_error $? "could not setup config headers machinery" "$LINENO" 5
+fi # test -n "$CONFIG_HEADERS"
+
+
+eval set X "  :F $CONFIG_FILES  :H $CONFIG_HEADERS  :L $CONFIG_LINKS  :C $CONFIG_COMMANDS"
+shift
+for ac_tag
+do
+  case $ac_tag in
+  :[FHLC]) ac_mode=$ac_tag; continue;;
+  esac
+  case $ac_mode$ac_tag in
+  :[FHL]*:*);;
+  :L* | :C*:*) as_fn_error $? "invalid tag \`$ac_tag'" "$LINENO" 5;;
+  :[FH]-) ac_tag=-:-;;
+  :[FH]*) ac_tag=$ac_tag:$ac_tag.in;;
+  esac
+  ac_save_IFS=$IFS
+  IFS=:
+  set x $ac_tag
+  IFS=$ac_save_IFS
+  shift
+  ac_file=$1
+  shift
+
+  case $ac_mode in
+  :L) ac_source=$1;;
+  :[FH])
+    ac_file_inputs=
+    for ac_f
+    do
+      case $ac_f in
+      -) ac_f="$ac_tmp/stdin";;
+      *) # Look for the file first in the build tree, then in the source tree
+	 # (if the path is not absolute).  The absolute path cannot be DOS-style,
+	 # because $ac_f cannot contain `:'.
+	 test -f "$ac_f" ||
+	   case $ac_f in
+	   [\\/$]*) false;;
+	   *) test -f "$srcdir/$ac_f" && ac_f="$srcdir/$ac_f";;
+	   esac ||
+	   as_fn_error 1 "cannot find input file: \`$ac_f'" "$LINENO" 5;;
+      esac
+      case $ac_f in *\'*) ac_f=`printf "%s\n" "$ac_f" | sed "s/'/'\\\\\\\\''/g"`;; esac
+      as_fn_append ac_file_inputs " '$ac_f'"
+    done
+
+    # Let's still pretend it is `configure' which instantiates (i.e., don't
+    # use $as_me), people would be surprised to read:
+    #    /* config.h.  Generated by config.status.  */
+    configure_input='Generated from '`
+	  printf "%s\n" "$*" | sed 's|^[^:]*/||;s|:[^:]*/|, |g'
+	`' by configure.'
+    if test x"$ac_file" != x-; then
+      configure_input="$ac_file.  $configure_input"
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: creating $ac_file" >&5
+printf "%s\n" "$as_me: creating $ac_file" >&6;}
+    fi
+    # Neutralize special characters interpreted by sed in replacement strings.
+    case $configure_input in #(
+    *\&* | *\|* | *\\* )
+       ac_sed_conf_input=`printf "%s\n" "$configure_input" |
+       sed 's/[\\\\&|]/\\\\&/g'`;; #(
+    *) ac_sed_conf_input=$configure_input;;
+    esac
+
+    case $ac_tag in
+    *:-:* | *:-) cat >"$ac_tmp/stdin" \
+      || as_fn_error $? "could not create $ac_file" "$LINENO" 5 ;;
+    esac
+    ;;
+  esac
+
+  ac_dir=`$as_dirname -- "$ac_file" ||
+$as_expr X"$ac_file" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$ac_file" : 'X\(//\)[^/]' \| \
+	 X"$ac_file" : 'X\(//\)$' \| \
+	 X"$ac_file" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X"$ac_file" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+  as_dir="$ac_dir"; as_fn_mkdir_p
+  ac_builddir=.
+
+case "$ac_dir" in
+.) ac_dir_suffix= ac_top_builddir_sub=. ac_top_build_prefix= ;;
+*)
+  ac_dir_suffix=/`printf "%s\n" "$ac_dir" | sed 's|^\.[\\/]||'`
+  # A ".." for each directory in $ac_dir_suffix.
+  ac_top_builddir_sub=`printf "%s\n" "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
+  case $ac_top_builddir_sub in
+  "") ac_top_builddir_sub=. ac_top_build_prefix= ;;
+  *)  ac_top_build_prefix=$ac_top_builddir_sub/ ;;
+  esac ;;
+esac
+ac_abs_top_builddir=$ac_pwd
+ac_abs_builddir=$ac_pwd$ac_dir_suffix
+# for backward compatibility:
+ac_top_builddir=$ac_top_build_prefix
+
+case $srcdir in
+  .)  # We are building in place.
+    ac_srcdir=.
+    ac_top_srcdir=$ac_top_builddir_sub
+    ac_abs_top_srcdir=$ac_pwd ;;
+  [\\/]* | ?:[\\/]* )  # Absolute name.
+    ac_srcdir=$srcdir$ac_dir_suffix;
+    ac_top_srcdir=$srcdir
+    ac_abs_top_srcdir=$srcdir ;;
+  *) # Relative name.
+    ac_srcdir=$ac_top_build_prefix$srcdir$ac_dir_suffix
+    ac_top_srcdir=$ac_top_build_prefix$srcdir
+    ac_abs_top_srcdir=$ac_pwd/$srcdir ;;
+esac
+ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
+
+
+  case $ac_mode in
+  :F)
+  #
+  # CONFIG_FILE
+  #
+
+  case $INSTALL in
+  [\\/$]* | ?:[\\/]* ) ac_INSTALL=$INSTALL ;;
+  *) ac_INSTALL=$ac_top_build_prefix$INSTALL ;;
+  esac
+  ac_MKDIR_P=$MKDIR_P
+  case $MKDIR_P in
+  [\\/$]* | ?:[\\/]* ) ;;
+  */*) ac_MKDIR_P=$ac_top_build_prefix$MKDIR_P ;;
+  esac
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+# If the template does not know about datarootdir, expand it.
+# FIXME: This hack should be removed a few years after 2.60.
+ac_datarootdir_hack=; ac_datarootdir_seen=
+ac_sed_dataroot='
+/datarootdir/ {
+  p
+  q
+}
+/@datadir@/p
+/@docdir@/p
+/@infodir@/p
+/@localedir@/p
+/@mandir@/p'
+case `eval "sed -n \"\$ac_sed_dataroot\" $ac_file_inputs"` in
+*datarootdir*) ac_datarootdir_seen=yes;;
+*@datadir@*|*@docdir@*|*@infodir@*|*@localedir@*|*@mandir@*)
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&5
+printf "%s\n" "$as_me: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&2;}
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+  ac_datarootdir_hack='
+  s&@datadir@&$datadir&g
+  s&@docdir@&$docdir&g
+  s&@infodir@&$infodir&g
+  s&@localedir@&$localedir&g
+  s&@mandir@&$mandir&g
+  s&\\\${datarootdir}&$datarootdir&g' ;;
+esac
+_ACEOF
+
+# Neutralize VPATH when `$srcdir' = `.'.
+# Shell code in configure.ac might set extrasub.
+# FIXME: do we really want to maintain this feature?
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+ac_sed_extra="$ac_vpsub
+$extrasub
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+:t
+/@[a-zA-Z_][a-zA-Z_0-9]*@/!b
+s|@configure_input@|$ac_sed_conf_input|;t t
+s&@top_builddir@&$ac_top_builddir_sub&;t t
+s&@top_build_prefix@&$ac_top_build_prefix&;t t
+s&@srcdir@&$ac_srcdir&;t t
+s&@abs_srcdir@&$ac_abs_srcdir&;t t
+s&@top_srcdir@&$ac_top_srcdir&;t t
+s&@abs_top_srcdir@&$ac_abs_top_srcdir&;t t
+s&@builddir@&$ac_builddir&;t t
+s&@abs_builddir@&$ac_abs_builddir&;t t
+s&@abs_top_builddir@&$ac_abs_top_builddir&;t t
+s&@INSTALL@&$ac_INSTALL&;t t
+s&@MKDIR_P@&$ac_MKDIR_P&;t t
+$ac_datarootdir_hack
+"
+eval sed \"\$ac_sed_extra\" "$ac_file_inputs" | $AWK -f "$ac_tmp/subs.awk" \
+  >$ac_tmp/out || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+
+test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
+  { ac_out=`sed -n '/\${datarootdir}/p' "$ac_tmp/out"`; test -n "$ac_out"; } &&
+  { ac_out=`sed -n '/^[	 ]*datarootdir[	 ]*:*=/p' \
+      "$ac_tmp/out"`; test -z "$ac_out"; } &&
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable \`datarootdir'
+which seems to be undefined.  Please make sure it is defined" >&5
+printf "%s\n" "$as_me: WARNING: $ac_file contains a reference to the variable \`datarootdir'
+which seems to be undefined.  Please make sure it is defined" >&2;}
+
+  rm -f "$ac_tmp/stdin"
+  case $ac_file in
+  -) cat "$ac_tmp/out" && rm -f "$ac_tmp/out";;
+  *) rm -f "$ac_file" && mv "$ac_tmp/out" "$ac_file";;
+  esac \
+  || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+ ;;
+  :H)
+  #
+  # CONFIG_HEADER
+  #
+  if test x"$ac_file" != x-; then
+    {
+      printf "%s\n" "/* $configure_input  */" >&1 \
+      && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs"
+    } >"$ac_tmp/config.h" \
+      || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+    if diff "$ac_file" "$ac_tmp/config.h" >/dev/null 2>&1; then
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: $ac_file is unchanged" >&5
+printf "%s\n" "$as_me: $ac_file is unchanged" >&6;}
+    else
+      rm -f "$ac_file"
+      mv "$ac_tmp/config.h" "$ac_file" \
+	|| as_fn_error $? "could not create $ac_file" "$LINENO" 5
+    fi
+  else
+    printf "%s\n" "/* $configure_input  */" >&1 \
+      && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs" \
+      || as_fn_error $? "could not create -" "$LINENO" 5
+  fi
+# Compute "$ac_file"'s index in $config_headers.
+_am_arg="$ac_file"
+_am_stamp_count=1
+for _am_header in $config_headers :; do
+  case $_am_header in
+    $_am_arg | $_am_arg:* )
+      break ;;
+    * )
+      _am_stamp_count=`expr $_am_stamp_count + 1` ;;
+  esac
+done
+echo "timestamp for $_am_arg" >`$as_dirname -- "$_am_arg" ||
+$as_expr X"$_am_arg" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$_am_arg" : 'X\(//\)[^/]' \| \
+	 X"$_am_arg" : 'X\(//\)$' \| \
+	 X"$_am_arg" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X"$_am_arg" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`/stamp-h$_am_stamp_count
+ ;;
+  :L)
+  #
+  # CONFIG_LINK
+  #
+
+  if test "$ac_source" = "$ac_file" && test "$srcdir" = '.'; then
+    :
+  else
+    # Prefer the file from the source tree if names are identical.
+    if test "$ac_source" = "$ac_file" || test ! -r "$ac_source"; then
+      ac_source=$srcdir/$ac_source
+    fi
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: linking $ac_source to $ac_file" >&5
+printf "%s\n" "$as_me: linking $ac_source to $ac_file" >&6;}
+
+    if test ! -r "$ac_source"; then
+      as_fn_error $? "$ac_source: file not found" "$LINENO" 5
+    fi
+    rm -f "$ac_file"
+
+    # Try a relative symlink, then a hard link, then a copy.
+    case $ac_source in
+    [\\/$]* | ?:[\\/]* ) ac_rel_source=$ac_source ;;
+	*) ac_rel_source=$ac_top_build_prefix$ac_source ;;
+    esac
+    ln -s "$ac_rel_source" "$ac_file" 2>/dev/null ||
+      ln "$ac_source" "$ac_file" 2>/dev/null ||
+      cp -p "$ac_source" "$ac_file" ||
+      as_fn_error $? "cannot link or copy $ac_source to $ac_file" "$LINENO" 5
+  fi
+ ;;
+  :C)  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: executing $ac_file commands" >&5
+printf "%s\n" "$as_me: executing $ac_file commands" >&6;}
+ ;;
+  esac
+
+
+  case $ac_file$ac_mode in
+    "depfiles":C) test x"$AMDEP_TRUE" != x"" || {
+  # Older Autoconf quotes --file arguments for eval, but not when files
+  # are listed without --file.  Let's play safe and only enable the eval
+  # if we detect the quoting.
+  # TODO: see whether this extra hack can be removed once we start
+  # requiring Autoconf 2.70 or later.
+  case $CONFIG_FILES in #(
+  *\'*) :
+    eval set x "$CONFIG_FILES" ;; #(
+  *) :
+    set x $CONFIG_FILES ;; #(
+  *) :
+     ;;
+esac
+  shift
+  # Used to flag and report bootstrapping failures.
+  am_rc=0
+  for am_mf
+  do
+    # Strip MF so we end up with the name of the file.
+    am_mf=`printf "%s\n" "$am_mf" | sed -e 's/:.*$//'`
+    # Check whether this is an Automake generated Makefile which includes
+    # dependency-tracking related rules and includes.
+    # Grep'ing the whole file directly is not great: AIX grep has a line
+    # limit of 2048, but all sed's we know have understand at least 4000.
+    sed -n 's,^am--depfiles:.*,X,p' "$am_mf" | grep X >/dev/null 2>&1 \
+      || continue
+    am_dirpart=`$as_dirname -- "$am_mf" ||
+$as_expr X"$am_mf" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$am_mf" : 'X\(//\)[^/]' \| \
+	 X"$am_mf" : 'X\(//\)$' \| \
+	 X"$am_mf" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X"$am_mf" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+    am_filepart=`$as_basename -- "$am_mf" ||
+$as_expr X/"$am_mf" : '.*/\([^/][^/]*\)/*$' \| \
+	 X"$am_mf" : 'X\(//\)$' \| \
+	 X"$am_mf" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X/"$am_mf" |
+    sed '/^.*\/\([^/][^/]*\)\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+    { echo "$as_me:$LINENO: cd "$am_dirpart" \
+      && sed -e '/# am--include-marker/d' "$am_filepart" \
+        | $MAKE -f - am--depfiles" >&5
+   (cd "$am_dirpart" \
+      && sed -e '/# am--include-marker/d' "$am_filepart" \
+        | $MAKE -f - am--depfiles) >&5 2>&5
+   ac_status=$?
+   echo "$as_me:$LINENO: \$? = $ac_status" >&5
+   (exit $ac_status); } || am_rc=$?
+  done
+  if test $am_rc -ne 0; then
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "Something went wrong bootstrapping makefile fragments
+    for automatic dependency tracking.  If GNU make was not used, consider
+    re-running the configure script with MAKE=\"gmake\" (or whatever is
+    necessary).  You can also try re-running configure with the
+    '--disable-dependency-tracking' option to at least be able to build
+    the package (albeit without support for automatic dependency tracking).
+See \`config.log' for more details" "$LINENO" 5; }
+  fi
+  { am_dirpart=; unset am_dirpart;}
+  { am_filepart=; unset am_filepart;}
+  { am_mf=; unset am_mf;}
+  { am_rc=; unset am_rc;}
+  rm -f conftest-deps.mk
+}
+ ;;
+    "po-directories":C)
+    for ac_file in $CONFIG_FILES; do
+      # Support "outfile[:infile[:infile...]]"
+      case "$ac_file" in
+        *:*) ac_file=`echo "$ac_file"|sed 's%:.*%%'` ;;
+      esac
+      # PO directories have a Makefile.in generated from Makefile.in.in.
+      case "$ac_file" in */Makefile.in)
+        # Adjust a relative srcdir.
+        ac_dir=`echo "$ac_file"|sed 's%/[^/][^/]*$%%'`
+        ac_dir_suffix=/`echo "$ac_dir"|sed 's%^\./%%'`
+        ac_dots=`echo "$ac_dir_suffix"|sed 's%/[^/]*%../%g'`
+        # In autoconf-2.13 it is called $ac_given_srcdir.
+        # In autoconf-2.50 it is called $srcdir.
+        test -n "$ac_given_srcdir" || ac_given_srcdir="$srcdir"
+        case "$ac_given_srcdir" in
+          .)  top_srcdir=`echo $ac_dots|sed 's%/$%%'` ;;
+          /*) top_srcdir="$ac_given_srcdir" ;;
+          *)  top_srcdir="$ac_dots$ac_given_srcdir" ;;
+        esac
+        # Treat a directory as a PO directory if and only if it has a
+        # POTFILES.in file. This allows packages to have multiple PO
+        # directories under different names or in different locations.
+        if test -f "$ac_given_srcdir/$ac_dir/POTFILES.in"; then
+          rm -f "$ac_dir/POTFILES"
+          test -n "$as_me" && echo "$as_me: creating $ac_dir/POTFILES" || echo "creating $ac_dir/POTFILES"
+          gt_tab=`printf '\t'`
+          cat "$ac_given_srcdir/$ac_dir/POTFILES.in" | sed -e "/^#/d" -e "/^[ ${gt_tab}]*\$/d" -e "s,.*,     $top_srcdir/& \\\\," | sed -e "\$s/\(.*\) \\\\/\1/" > "$ac_dir/POTFILES"
+          POMAKEFILEDEPS="POTFILES.in"
+          # ALL_LINGUAS, POFILES, UPDATEPOFILES, DUMMYPOFILES, GMOFILES depend
+          # on $ac_dir but don't depend on user-specified configuration
+          # parameters.
+          if test -f "$ac_given_srcdir/$ac_dir/LINGUAS"; then
+            # The LINGUAS file contains the set of available languages.
+            if test -n "$OBSOLETE_ALL_LINGUAS"; then
+              test -n "$as_me" && echo "$as_me: setting ALL_LINGUAS in configure.in is obsolete" || echo "setting ALL_LINGUAS in configure.in is obsolete"
+            fi
+            ALL_LINGUAS_=`sed -e "/^#/d" -e "s/#.*//" "$ac_given_srcdir/$ac_dir/LINGUAS"`
+            # Hide the ALL_LINGUAS assignment from automake < 1.5.
+            eval 'ALL_LINGUAS''=$ALL_LINGUAS_'
+            POMAKEFILEDEPS="$POMAKEFILEDEPS LINGUAS"
+          else
+            # The set of available languages was given in configure.in.
+            # Hide the ALL_LINGUAS assignment from automake < 1.5.
+            eval 'ALL_LINGUAS''=$OBSOLETE_ALL_LINGUAS'
+          fi
+          # Compute POFILES
+          # as      $(foreach lang, $(ALL_LINGUAS), $(srcdir)/$(lang).po)
+          # Compute UPDATEPOFILES
+          # as      $(foreach lang, $(ALL_LINGUAS), $(lang).po-update)
+          # Compute DUMMYPOFILES
+          # as      $(foreach lang, $(ALL_LINGUAS), $(lang).nop)
+          # Compute GMOFILES
+          # as      $(foreach lang, $(ALL_LINGUAS), $(srcdir)/$(lang).gmo)
+          case "$ac_given_srcdir" in
+            .) srcdirpre= ;;
+            *) srcdirpre='$(srcdir)/' ;;
+          esac
+          POFILES=
+          UPDATEPOFILES=
+          DUMMYPOFILES=
+          GMOFILES=
+          for lang in $ALL_LINGUAS; do
+            POFILES="$POFILES $srcdirpre$lang.po"
+            UPDATEPOFILES="$UPDATEPOFILES $lang.po-update"
+            DUMMYPOFILES="$DUMMYPOFILES $lang.nop"
+            GMOFILES="$GMOFILES $srcdirpre$lang.gmo"
+          done
+          # CATALOGS depends on both $ac_dir and the user's LINGUAS
+          # environment variable.
+          INST_LINGUAS=
+          if test -n "$ALL_LINGUAS"; then
+            for presentlang in $ALL_LINGUAS; do
+              useit=no
+              if test "%UNSET%" != "$LINGUAS"; then
+                desiredlanguages="$LINGUAS"
+              else
+                desiredlanguages="$ALL_LINGUAS"
+              fi
+              for desiredlang in $desiredlanguages; do
+                # Use the presentlang catalog if desiredlang is
+                #   a. equal to presentlang, or
+                #   b. a variant of presentlang (because in this case,
+                #      presentlang can be used as a fallback for messages
+                #      which are not translated in the desiredlang catalog).
+                case "$desiredlang" in
+                  "$presentlang"*) useit=yes;;
+                esac
+              done
+              if test $useit = yes; then
+                INST_LINGUAS="$INST_LINGUAS $presentlang"
+              fi
+            done
+          fi
+          CATALOGS=
+          if test -n "$INST_LINGUAS"; then
+            for lang in $INST_LINGUAS; do
+              CATALOGS="$CATALOGS $lang.gmo"
+            done
+          fi
+          test -n "$as_me" && echo "$as_me: creating $ac_dir/Makefile" || echo "creating $ac_dir/Makefile"
+          sed -e "/^POTFILES =/r $ac_dir/POTFILES" -e "/^# Makevars/r $ac_given_srcdir/$ac_dir/Makevars" -e "s|@POFILES@|$POFILES|g" -e "s|@UPDATEPOFILES@|$UPDATEPOFILES|g" -e "s|@DUMMYPOFILES@|$DUMMYPOFILES|g" -e "s|@GMOFILES@|$GMOFILES|g" -e "s|@CATALOGS@|$CATALOGS|g" -e "s|@POMAKEFILEDEPS@|$POMAKEFILEDEPS|g" "$ac_dir/Makefile.in" > "$ac_dir/Makefile"
+          for f in "$ac_given_srcdir/$ac_dir"/Rules-*; do
+            if test -f "$f"; then
+              case "$f" in
+                *.orig | *.bak | *~) ;;
+                *) cat "$f" >> "$ac_dir/Makefile" ;;
+              esac
+            fi
+          done
+        fi
+        ;;
+      esac
+    done ;;
+
+  esac
+done # for ac_tag
+
+
+as_fn_exit 0
+_ACEOF
+ac_clean_files=$ac_clean_files_save
+
+test $ac_write_fail = 0 ||
+  as_fn_error $? "write failure creating $CONFIG_STATUS" "$LINENO" 5
+
+
+# configure is writing to config.log, and then calls config.status.
+# config.status does its own redirection, appending to config.log.
+# Unfortunately, on DOS this fails, as config.log is still kept open
+# by configure, so config.status won't be able to write to it; its
+# output is simply discarded.  So we exec the FD to /dev/null,
+# effectively closing config.log, so it can be properly (re)opened and
+# appended to by config.status.  When coming back to configure, we
+# need to make the FD available again.
+if test "$no_create" != yes; then
+  ac_cs_success=:
+  ac_config_status_args=
+  test "$silent" = yes &&
+    ac_config_status_args="$ac_config_status_args --quiet"
+  exec 5>/dev/null
+  $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=false
+  exec 5>>config.log
+  # Use ||, not &&, to avoid exiting from the if with $? = 1, which
+  # would make configure fail if this is the last instruction.
+  $ac_cs_success || as_fn_exit 1
+fi
+if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5
+printf "%s\n" "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
+fi
+
+
diff --git a/src/grep/configure.ac b/src/grep/configure.ac
new file mode 100644
index 0000000..c49ec4a
--- /dev/null
+++ b/src/grep/configure.ac
@@ -0,0 +1,219 @@
+dnl
+dnl autoconf input file for GNU grep
+dnl
+dnl Copyright (C) 1997-2006, 2009-2021 Free Software Foundation, Inc.
+dnl
+dnl This file is part of GNU grep.
+dnl
+dnl This program is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3, or (at your option)
+dnl any later version.
+dnl
+dnl This program is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+AC_INIT([GNU grep],
+        m4_esyscmd([build-aux/git-version-gen .tarball-version]),
+        [bug-grep@gnu.org])
+
+if test -n "$GREP" || test -n "$EGREP"; then
+  AC_MSG_ERROR(
+    [no working 'grep' found
+  A working 'grep' command is needed to build GNU Grep.
+  This 'grep' should support -e and long lines.
+  On Solaris 10, install the package SUNWggrp or SUNWxcu4.
+  On Solaris 11, install the package text/gnu-grep or system/xopen/xcu4.])
+fi
+
+AC_CONFIG_AUX_DIR([build-aux])
+AC_CONFIG_SRCDIR([src/grep.c])
+AC_DEFINE([GREP], 1, [We are building grep])
+AC_PREREQ([2.64])
+AC_CONFIG_MACRO_DIRS([m4])
+
+dnl Automake stuff.
+AM_INIT_AUTOMAKE([1.11 dist-xz color-tests parallel-tests
+                  subdir-objects])
+AM_SILENT_RULES([yes]) # make --enable-silent-rules the default.
+
+AC_CONFIG_HEADERS([config.h:config.hin])
+
+dnl Checks for programs.
+AC_CANONICAL_HOST
+AC_PROG_AWK
+AC_PROG_INSTALL
+AC_PROG_CC
+gl_EARLY
+AC_PROG_RANLIB
+PKG_PROG_PKG_CONFIG([0.9.0])
+
+# grep never invokes mbrtowc or mbrlen on empty input,
+# so don't worry about this common bug,
+# as working around it would merely slow grep down.
+gl_cv_func_mbrtowc_empty_input='assume yes'
+
+dnl Checks for typedefs, structures, and compiler characteristics.
+AC_TYPE_SIZE_T
+AC_C_CONST
+gl_INIT
+
+# Ensure VLAs are not used.
+# Note -Wvla is implicitly added by gl_MANYWARN_ALL_GCC
+AC_DEFINE([GNULIB_NO_VLA], [1], [Define to 1 to disable use of VLAs])
+
+# The test suite needs to know if we have a working perl.
+# FIXME: this is suboptimal.  Ideally, we would be able to call gl_PERL
+# with an ACTION-IF-NOT-FOUND argument ...
+cu_have_perl=yes
+case $PERL in *"/missing "*) cu_have_perl=no;; esac
+AM_CONDITIONAL([HAVE_PERL], [test $cu_have_perl = yes])
+
+AC_ARG_ENABLE([gcc-warnings],
+  [AS_HELP_STRING([--enable-gcc-warnings],
+                  [turn on lots of GCC warnings (for developers)])],
+  [case $enableval in
+     yes|no) ;;
+     *)      AC_MSG_ERROR([bad value $enableval for gcc-warnings option]) ;;
+   esac
+   gl_gcc_warnings=$enableval],
+  [gl_gcc_warnings=no
+   if test "$GCC" = yes && test -d "$srcdir"/.git; then
+     AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM([[
+          #if ! (6 < __GNUC__ + (2 <= __GNUC_MINOR__))
+            #error "--enable-gcc-warnings defaults to 'no' on older GCC"
+          #endif
+          ]])],
+       [gl_gcc_warnings=yes])
+   fi]
+)
+
+if test "$gl_gcc_warnings" = yes; then
+  gl_WARN_ADD([-Werror], [WERROR_CFLAGS])
+  AC_SUBST([WERROR_CFLAGS])
+
+  nw=
+  # This, $nw, is the list of warnings we disable.
+  nw="$nw -Wdeclaration-after-statement" # too useful to forbid
+  nw="$nw -Waggregate-return"       # anachronistic
+  nw="$nw -Wlong-long"              # C90 is anachronistic (lib/gethrxtime.h)
+  nw="$nw -Wc++-compat"             # We don't care about C++ compilers
+  nw="$nw -Wundef"                  # Warns on '#if GNULIB_FOO' etc in gnulib
+  nw="$nw -Wsystem-headers"         # Don't let system headers trigger warnings
+  nw="$nw -Wpadded"                 # Our structs are not padded
+  nw="$nw -Wstack-protector"        # generates false alarms for useful code
+  nw="$nw -Wswitch-default"         # Too many warnings for now
+  nw="$nw -Wunsafe-loop-optimizations" # OK to suppress unsafe optimizations
+  nw="$nw -Winline"                 # streq.h's streq4, streq6 and strcaseeq6
+  nw="$nw -Wstrict-overflow"        # regexec.c
+
+  gl_MANYWARN_ALL_GCC([ws])
+  gl_MANYWARN_COMPLEMENT([ws], [$ws], [$nw])
+  for w in $ws; do
+    gl_WARN_ADD([$w])
+  done
+  gl_WARN_ADD([-Wno-missing-field-initializers]) # We need this one
+  gl_WARN_ADD([-Wno-sign-compare])     # Too many warnings for now
+  gl_WARN_ADD([-Wno-unused-parameter]) # Too many warnings for now
+  gl_WARN_ADD([-Wno-cast-function-type]) # sig-handler.h's sa_handler_t cast
+
+  # In spite of excluding -Wlogical-op above, it is enabled, as of
+  # gcc 4.5.0 20090517, and it provokes warnings in cat.c, dd.c, truncate.c
+  gl_WARN_ADD([-Wno-logical-op])
+
+  AC_SUBST([WARN_CFLAGS])
+
+  AC_DEFINE([lint], [1], [Define to 1 if the compiler is checking for lint.])
+  AC_DEFINE([GNULIB_PORTCHECK], [1], [enable some gnulib portability checks])
+  AH_VERBATIM([GNULIB_PORTCHECK_FORTIFY_SOURCE],
+  [/* Enable compile-time and run-time bounds-checking, and some warnings,
+      without upsetting glibc 2.15+. */
+   #if (defined GNULIB_PORTCHECK && !defined _FORTIFY_SOURCE \
+        && defined __OPTIMIZE__ && __OPTIMIZE__)
+   # define _FORTIFY_SOURCE 2
+   #endif
+  ])
+
+  # We use a slightly smaller set of warning options for lib/.
+  # Remove the following and save the result in GNULIB_WARN_CFLAGS.
+  nw=
+  nw="$nw -Wunused-macros"
+  gl_WARN_ADD([-Wno-format-nonliteral])
+  gl_MANYWARN_COMPLEMENT([GNULIB_WARN_CFLAGS], [$WARN_CFLAGS], [$nw])
+  AC_SUBST([GNULIB_WARN_CFLAGS])
+
+  # For gnulib-tests, the set is slightly smaller still.
+  nw=
+  nw="$nw -Wstrict-prototypes"
+  # It's not worth being this picky about test programs.
+  nw="$nw -Wsuggest-attribute=const"
+  nw="$nw -Wsuggest-attribute=pure"
+  nw="$nw -Wsuggest-attribute=format"
+  nw="$nw -Wformat-truncation=2"    # False alarm in strerror_r.c
+  nw="$nw -Wold-style-definition"
+
+  # Disable to avoid warnings in e.g., test-intprops.c and test-limits-h.c
+  # due to overlong expansions like this:
+  # test-intprops.c:147:5: error: string literal of length 9531 exceeds \
+  # maximum length 4095 that ISO C99 compilers are required to support
+  nw="$nw -Woverlength-strings"
+
+  gl_MANYWARN_COMPLEMENT([GNULIB_TEST_WARN_CFLAGS],
+                         [$GNULIB_WARN_CFLAGS], [$nw])
+  gl_WARN_ADD([-Wno-return-type], [GNULIB_TEST_WARN_CFLAGS])
+  AC_SUBST([GNULIB_TEST_WARN_CFLAGS])
+fi
+
+# By default, argmatch should fail calling usage (EXIT_FAILURE).
+AC_DEFINE([ARGMATCH_DIE], [usage (EXIT_FAILURE)],
+          [Define to the function xargmatch calls on failures.])
+AC_DEFINE([ARGMATCH_DIE_DECL], [void usage (int _e)],
+          [Define to the declaration of the xargmatch failure function.])
+
+dnl Checks for header files.
+AC_HEADER_DIRENT
+
+dnl Checks for functions.
+AC_FUNC_CLOSEDIR_VOID
+
+AC_CHECK_FUNCS_ONCE([isascii setlocale])
+
+dnl I18N feature
+AM_GNU_GETTEXT_VERSION([0.18.2])
+AM_GNU_GETTEXT([external])
+
+dnl Some installers want to be informed if we do not use our regex.
+dnl For example, if the host platform uses dynamic linking and the installer
+dnl knows that the grep may be invoked on other hosts with buggy libraries,
+dnl then the installer should configure --with-included-regex.
+AM_CONDITIONAL([USE_INCLUDED_REGEX], [test "$ac_use_included_regex" = yes])
+if test "$ac_use_included_regex" = no; then
+  AC_MSG_WARN([Included lib/regex.c not used])
+fi
+
+gl_FUNC_PCRE
+AM_CONDITIONAL([USE_PCRE], [test $use_pcre = yes])
+
+case $host_os in
+  mingw*) suffix=w32 ;;
+  *) suffix=posix ;;
+esac
+COLORIZE_SOURCE=colorize-$suffix.c
+AC_SUBST([COLORIZE_SOURCE])
+
+AC_CONFIG_FILES([
+  Makefile
+  lib/Makefile
+  src/Makefile
+  tests/Makefile
+  po/Makefile.in
+  doc/Makefile
+  gnulib-tests/Makefile
+])
+AC_OUTPUT
diff --git a/src/grep/dist-check.mk b/src/grep/dist-check.mk
new file mode 100644
index 0000000..f23339e
--- /dev/null
+++ b/src/grep/dist-check.mk
@@ -0,0 +1,198 @@
+# Most of this is probably too coreutils-centric to be useful to other packages.
+
+bin=bin-$$$$
+
+write_loser = printf '\#!%s\necho $$0: bad path 1>&2; exit 1\n' '$(SHELL)'
+
+tmpdir = $(abs_top_builddir)/tests/torture
+
+t=$(tmpdir)/$(PACKAGE)/test
+pfx=$(t)/i
+
+built_programs =						\
+  $$(echo 'spy:;@echo $$(bin_PROGRAMS)'				\
+    | MAKEFLAGS= $(MAKE) -s -f Makefile -f - spy		\
+    | fmt -1 | sed 's,$(EXEEXT)$$,,' | sort -u)
+
+# More than once, tainted build and source directory names would
+# have caused at least one "make check" test to apply "chmod 700"
+# to all directories under $HOME.  Make sure it doesn't happen again.
+tp = $(tmpdir)/taint
+t_prefix = $(tp)/a
+t_taint = '$(t_prefix) b'
+fake_home = $(tp)/home
+
+# When extracting from a distribution tarball, extract using the fastest
+# method possible.  With dist-xz, that means using the *.xz file.
+ifneq ('', $(filter *.xz, $(DIST_ARCHIVES)))
+  tar_decompress_opt_ = J
+  suffix_ = xz
+else
+  ifneq ('', $(filter *.gz, $(DIST_ARCHIVES)))
+    tar_decompress_opt_ = z
+    suffix_ = gz
+  else
+    tar_decompress_opt_ = j
+    suffix_ = bz2
+  endif
+endif
+amtar_extract_ = $(AMTAR) -$(tar_decompress_opt_)xf
+preferred_tarball_ = $(distdir).tar.$(suffix_)
+
+# Ensure that tests run from tainted build and src dir names work,
+# and don't affect anything in $HOME.  Create witness files in $HOME,
+# record their attributes, and build/test.  Then ensure that the
+# witnesses were not affected.
+# Skip this test when using libtool, since libtool-generated scripts
+# cannot deal with a space-tainted srcdir.
+ALL_RECURSIVE_TARGETS += taint-distcheck
+taint-distcheck: $(DIST_ARCHIVES)
+	grep '^[	 ]*LT_INIT' configure.ac >/dev/null && exit 0 || :
+	test -d $(t_taint) && chmod -R 700 $(t_taint) || :
+	-rm -rf $(t_taint) $(fake_home)
+	mkdir -p $(t_prefix) $(t_taint) $(fake_home)
+	$(amtar_extract_) $(preferred_tarball_) -C $(t_taint)
+	mkfifo $(fake_home)/fifo
+	touch $(fake_home)/f
+	mkdir -p $(fake_home)/d/e
+	ls -lR $(fake_home) $(t_prefix) > $(tp)/.ls-before
+	HOME=$(fake_home); export HOME;			\
+	cd $(t_taint)/$(distdir)			\
+	  && ./configure				\
+	  && $(MAKE)					\
+	  && $(MAKE) check				\
+	  && ls -lR $(fake_home) $(t_prefix) > $(tp)/.ls-after \
+	  && diff $(tp)/.ls-before $(tp)/.ls-after	\
+	  && test -d $(t_prefix)
+	rm -rf $(tp)
+
+# Verify that a twisted use of --program-transform-name=PROGRAM works.
+define install-transform-check
+  echo running install-transform-check			\
+    && rm -rf $(pfx)					\
+    && $(MAKE) program_transform_name='s/.*/zyx/'	\
+      prefix=$(pfx) install				\
+    && test "$$(echo $(pfx)/bin/*)" = "$(pfx)/bin/zyx"	\
+    && test "$$(find $(pfx)/share/man -type f|sed 's,.*/,,;s,\..*,,')" = "zyx"
+endef
+
+# Install, then verify that all binaries and man pages are in place.
+# Note that neither the binary, ginstall, nor the [.1 man page is installed.
+define my-instcheck
+  echo running my-instcheck;				\
+  $(MAKE) prefix=$(pfx) install				\
+    && test ! -f $(pfx)/bin/ginstall			\
+    && { fail=0;					\
+      for i in $(built_programs); do			\
+        test "$$i" = ginstall && i=install;		\
+        for j in "$(pfx)/bin/$$i"			\
+                 "$(pfx)/share/man/man1/$$i.1"; do	\
+          case $$j in *'[.1') continue;; esac;		\
+          test -f "$$j" && :				\
+            || { echo "$$j not installed"; fail=1; };	\
+        done;						\
+      done;						\
+      test $$fail = 1 && exit 1 || :;			\
+    }
+endef
+
+# The hard-linking for-loop below ensures that there is a bin/ directory
+# full of all of the programs under test (except the ones that are required
+# for basic Makefile rules), all symlinked to the just-built "false" program.
+# This is to ensure that if ever a test neglects to make PATH include
+# the build srcdir, these always-failing programs will run.
+# Otherwise, it is too easy to test the wrong programs.
+# Note that "false" itself is a symlink to true, so it too will malfunction.
+define coreutils-path-check
+  {							\
+    echo running coreutils-path-check;			\
+    if test -f $(srcdir)/src/true.c; then		\
+      fail=1;						\
+      mkdir $(bin)					\
+	&& ($(write_loser)) > $(bin)/loser		\
+	&& chmod a+x $(bin)/loser			\
+	&& for i in $(built_programs); do		\
+	       case $$i in				\
+		 rm|expr|basename|echo|sort|ls|tr);;	\
+		 cat|dirname|mv|wc);;			\
+		 *) ln $(bin)/loser $(bin)/$$i;;	\
+	       esac;					\
+	     done					\
+	  && ln -sf ../src/true $(bin)/false		\
+	  && PATH=`pwd`/$(bin)$(PATH_SEPARATOR)$$PATH	\
+		$(MAKE) -C tests check			\
+	  && { test -d gnulib-tests			\
+		 && $(MAKE) -C gnulib-tests check	\
+		 || :; }				\
+	  && rm -rf $(bin)				\
+	  && fail=0;					\
+    else						\
+      fail=0;						\
+    fi;							\
+    test $$fail = 1 && exit 1 || :;			\
+  }
+endef
+
+# More generic version of the rule above.
+define generic-path-check
+  {							\
+    echo running generic-path-check;			\
+    if test -f /bin/false; then				\
+      fail=1;						\
+      mkdir $(bin)					\
+	&& ($(write_loser)) > $(bin)/loser		\
+	&& chmod a+x $(bin)/loser			\
+	&& for i in $(built_programs); do		\
+	     ln $(bin)/loser $(bin)/$$i;		\
+	   done						\
+	&& PATH=`pwd`/$(bin)$(PATH_SEPARATOR)$$PATH	\
+	     $(MAKE) check				\
+	&& { test -d gnulib-tests			\
+	       && $(MAKE) -C gnulib-tests check		\
+	       || :; }					\
+	&& rm -rf $(bin)				\
+	&& fail=0;					\
+    else						\
+      fail=0;						\
+    fi;							\
+    test $$fail = 1 && exit 1 || :;			\
+  }
+endef
+
+# Use this to make sure we don't run these programs when building
+# from a virgin compressed tarball file, below.
+null_AM_MAKEFLAGS ?= \
+  ACLOCAL=false \
+  AUTOCONF=false \
+  AUTOMAKE=false \
+  AUTOHEADER=false \
+  GPERF=false \
+  MAKEINFO=false
+
+ALL_RECURSIVE_TARGETS += my-distcheck
+my-distcheck: $(DIST_ARCHIVES) $(local-check)
+	$(MAKE) syntax-check
+	$(MAKE) check
+	-rm -rf $(t)
+	mkdir -p $(t)
+	$(amtar_extract_) $(preferred_tarball_) -C $(t)
+	(set -e; cd $(t)/$(distdir);			\
+	  ./configure --quiet --enable-gcc-warnings --disable-nls; \
+	  $(MAKE) AM_MAKEFLAGS='$(null_AM_MAKEFLAGS)';	\
+	  $(MAKE) dvi;					\
+	  $(install-transform-check);			\
+	  $(my-instcheck);				\
+	  $(coreutils-path-check);			\
+	  $(generic-path-check);			\
+	  $(MAKE) distclean				\
+	)
+	(cd $(t) && mv $(distdir) $(distdir).old	\
+	  && $(amtar_extract_) - ) < $(preferred_tarball_)
+	find $(t)/$(distdir).old $(t)/$(distdir) -name .deps | xargs rmdir
+	diff -ur $(t)/$(distdir).old $(t)/$(distdir)
+	-rm -rf $(t)
+	rmdir $(tmpdir)/$(PACKAGE) $(tmpdir)
+	@echo "========================"; \
+	echo "ready for distribution:"; \
+	for i in $(DIST_ARCHIVES); do echo "  $$i"; done; \
+	echo "========================"
diff --git a/src/grep/doc/Makefile.am b/src/grep/doc/Makefile.am
new file mode 100644
index 0000000..7075e8d
--- /dev/null
+++ b/src/grep/doc/Makefile.am
@@ -0,0 +1,38 @@
+# Process this file with automake to create Makefile.in
+# Makefile.am for grep/doc.
+#
+# Copyright 2008-2021 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+info_TEXINFOS = grep.texi
+grep_TEXINFOS = fdl.texi
+
+man_MANS = grep.1 fgrep.1 egrep.1
+
+EXTRA_DIST = grep.in.1
+CLEANFILES = grep.1 egrep.1 fgrep.1
+
+grep.1: grep.in.1
+	$(AM_V_GEN)rm -f $@-t $@
+	$(AM_V_at)sed 's/@''VERSION@/$(VERSION)/' $(srcdir)/grep.in.1 > $@-t
+	$(AM_V_at)chmod a=r $@-t
+	$(AM_V_at)mv -f $@-t $@
+
+egrep.1 fgrep.1: Makefile.am
+	$(AM_V_GEN)rm -f $@-t $@
+	$(AM_V_at)inst=`echo grep | sed '$(transform)'`.1 \
+	  && echo ".so man1/$$inst" > $@-t
+	$(AM_V_at)chmod a=r $@-t
+	$(AM_V_at)mv -f $@-t $@
diff --git a/src/grep/doc/Makefile.in b/src/grep/doc/Makefile.in
new file mode 100644
index 0000000..24fe731
--- /dev/null
+++ b/src/grep/doc/Makefile.in
@@ -0,0 +1,2130 @@
+# Makefile.in generated by automake 1.16d from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+# Process this file with automake to create Makefile.in
+# Makefile.am for grep/doc.
+#
+# Copyright 2008-2021 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+VPATH = @srcdir@
+am__is_gnu_make = { \
+  if test -z '$(MAKELEVEL)'; then \
+    false; \
+  elif test -n '$(MAKE_HOST)'; then \
+    true; \
+  elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+    true; \
+  else \
+    false; \
+  fi; \
+}
+am__make_running_with_option = \
+  case $${target_option-} in \
+      ?) ;; \
+      *) echo "am__make_running_with_option: internal error: invalid" \
+              "target option '$${target_option-}' specified" >&2; \
+         exit 1;; \
+  esac; \
+  has_opt=no; \
+  sane_makeflags=$$MAKEFLAGS; \
+  if $(am__is_gnu_make); then \
+    sane_makeflags=$$MFLAGS; \
+  else \
+    case $$MAKEFLAGS in \
+      *\\[\ \	]*) \
+        bs=\\; \
+        sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \
+          | sed "s/$$bs$$bs[$$bs $$bs	]*//g"`;; \
+    esac; \
+  fi; \
+  skip_next=no; \
+  strip_trailopt () \
+  { \
+    flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \
+  }; \
+  for flg in $$sane_makeflags; do \
+    test $$skip_next = yes && { skip_next=no; continue; }; \
+    case $$flg in \
+      *=*|--*) continue;; \
+        -*I) strip_trailopt 'I'; skip_next=yes;; \
+      -*I?*) strip_trailopt 'I';; \
+        -*O) strip_trailopt 'O'; skip_next=yes;; \
+      -*O?*) strip_trailopt 'O';; \
+        -*l) strip_trailopt 'l'; skip_next=yes;; \
+      -*l?*) strip_trailopt 'l';; \
+      -[dEDm]) skip_next=yes;; \
+      -[JT]) skip_next=yes;; \
+    esac; \
+    case $$flg in \
+      *$$target_option*) has_opt=yes; break;; \
+    esac; \
+  done; \
+  test $$has_opt = yes
+am__make_dryrun = (target_option=n; $(am__make_running_with_option))
+am__make_keepgoing = (target_option=k; $(am__make_running_with_option))
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+subdir = doc
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/m4/00gnulib.m4 \
+	$(top_srcdir)/m4/__inline.m4 \
+	$(top_srcdir)/m4/absolute-header.m4 $(top_srcdir)/m4/alloca.m4 \
+	$(top_srcdir)/m4/arpa_inet_h.m4 \
+	$(top_srcdir)/m4/asm-underscore.m4 $(top_srcdir)/m4/assert.m4 \
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+	$(top_srcdir)/m4/c-stack.m4 $(top_srcdir)/m4/calloc.m4 \
+	$(top_srcdir)/m4/chdir-long.m4 $(top_srcdir)/m4/close.m4 \
+	$(top_srcdir)/m4/closedir.m4 $(top_srcdir)/m4/codeset.m4 \
+	$(top_srcdir)/m4/configmake.m4 $(top_srcdir)/m4/ctype_h.m4 \
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+GL_GNULIB_OPEN = @GL_GNULIB_OPEN@
+GL_GNULIB_OPENAT = @GL_GNULIB_OPENAT@
+GL_GNULIB_OPENDIR = @GL_GNULIB_OPENDIR@
+GL_GNULIB_OVERRIDES_STRUCT_STAT = @GL_GNULIB_OVERRIDES_STRUCT_STAT@
+GL_GNULIB_PCLOSE = @GL_GNULIB_PCLOSE@
+GL_GNULIB_PERROR = @GL_GNULIB_PERROR@
+GL_GNULIB_PIPE = @GL_GNULIB_PIPE@
+GL_GNULIB_PIPE2 = @GL_GNULIB_PIPE2@
+GL_GNULIB_POPEN = @GL_GNULIB_POPEN@
+GL_GNULIB_POSIX_MEMALIGN = @GL_GNULIB_POSIX_MEMALIGN@
+GL_GNULIB_POSIX_OPENPT = @GL_GNULIB_POSIX_OPENPT@
+GL_GNULIB_PREAD = @GL_GNULIB_PREAD@
+GL_GNULIB_PRINTF = @GL_GNULIB_PRINTF@
+GL_GNULIB_PRINTF_POSIX = @GL_GNULIB_PRINTF_POSIX@
+GL_GNULIB_PSELECT = @GL_GNULIB_PSELECT@
+GL_GNULIB_PTHREAD_COND = @GL_GNULIB_PTHREAD_COND@
+GL_GNULIB_PTHREAD_MUTEX = @GL_GNULIB_PTHREAD_MUTEX@
+GL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK = @GL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK@
+GL_GNULIB_PTHREAD_ONCE = @GL_GNULIB_PTHREAD_ONCE@
+GL_GNULIB_PTHREAD_RWLOCK = @GL_GNULIB_PTHREAD_RWLOCK@
+GL_GNULIB_PTHREAD_SIGMASK = @GL_GNULIB_PTHREAD_SIGMASK@
+GL_GNULIB_PTHREAD_SPIN = @GL_GNULIB_PTHREAD_SPIN@
+GL_GNULIB_PTHREAD_THREAD = @GL_GNULIB_PTHREAD_THREAD@
+GL_GNULIB_PTHREAD_TSS = @GL_GNULIB_PTHREAD_TSS@
+GL_GNULIB_PTSNAME = @GL_GNULIB_PTSNAME@
+GL_GNULIB_PTSNAME_R = @GL_GNULIB_PTSNAME_R@
+GL_GNULIB_PUTC = @GL_GNULIB_PUTC@
+GL_GNULIB_PUTCHAR = @GL_GNULIB_PUTCHAR@
+GL_GNULIB_PUTENV = @GL_GNULIB_PUTENV@
+GL_GNULIB_PUTS = @GL_GNULIB_PUTS@
+GL_GNULIB_PWRITE = @GL_GNULIB_PWRITE@
+GL_GNULIB_QSORT_R = @GL_GNULIB_QSORT_R@
+GL_GNULIB_RAISE = @GL_GNULIB_RAISE@
+GL_GNULIB_RANDOM = @GL_GNULIB_RANDOM@
+GL_GNULIB_RANDOM_R = @GL_GNULIB_RANDOM_R@
+GL_GNULIB_RAWMEMCHR = @GL_GNULIB_RAWMEMCHR@
+GL_GNULIB_READ = @GL_GNULIB_READ@
+GL_GNULIB_READDIR = @GL_GNULIB_READDIR@
+GL_GNULIB_READLINK = @GL_GNULIB_READLINK@
+GL_GNULIB_READLINKAT = @GL_GNULIB_READLINKAT@
+GL_GNULIB_REALLOCARRAY = @GL_GNULIB_REALLOCARRAY@
+GL_GNULIB_REALLOC_POSIX = @GL_GNULIB_REALLOC_POSIX@
+GL_GNULIB_REALPATH = @GL_GNULIB_REALPATH@
+GL_GNULIB_RECV = @GL_GNULIB_RECV@
+GL_GNULIB_RECVFROM = @GL_GNULIB_RECVFROM@
+GL_GNULIB_REMOVE = @GL_GNULIB_REMOVE@
+GL_GNULIB_RENAME = @GL_GNULIB_RENAME@
+GL_GNULIB_RENAMEAT = @GL_GNULIB_RENAMEAT@
+GL_GNULIB_REWINDDIR = @GL_GNULIB_REWINDDIR@
+GL_GNULIB_RMDIR = @GL_GNULIB_RMDIR@
+GL_GNULIB_RPMATCH = @GL_GNULIB_RPMATCH@
+GL_GNULIB_SCANDIR = @GL_GNULIB_SCANDIR@
+GL_GNULIB_SCANF = @GL_GNULIB_SCANF@
+GL_GNULIB_SCHED_YIELD = @GL_GNULIB_SCHED_YIELD@
+GL_GNULIB_SECURE_GETENV = @GL_GNULIB_SECURE_GETENV@
+GL_GNULIB_SELECT = @GL_GNULIB_SELECT@
+GL_GNULIB_SEND = @GL_GNULIB_SEND@
+GL_GNULIB_SENDTO = @GL_GNULIB_SENDTO@
+GL_GNULIB_SETENV = @GL_GNULIB_SETENV@
+GL_GNULIB_SETHOSTNAME = @GL_GNULIB_SETHOSTNAME@
+GL_GNULIB_SETLOCALE = @GL_GNULIB_SETLOCALE@
+GL_GNULIB_SETLOCALE_NULL = @GL_GNULIB_SETLOCALE_NULL@
+GL_GNULIB_SETSOCKOPT = @GL_GNULIB_SETSOCKOPT@
+GL_GNULIB_SHUTDOWN = @GL_GNULIB_SHUTDOWN@
+GL_GNULIB_SIGABBREV_NP = @GL_GNULIB_SIGABBREV_NP@
+GL_GNULIB_SIGACTION = @GL_GNULIB_SIGACTION@
+GL_GNULIB_SIGDESCR_NP = @GL_GNULIB_SIGDESCR_NP@
+GL_GNULIB_SIGNAL_H_SIGPIPE = @GL_GNULIB_SIGNAL_H_SIGPIPE@
+GL_GNULIB_SIGPROCMASK = @GL_GNULIB_SIGPROCMASK@
+GL_GNULIB_SLEEP = @GL_GNULIB_SLEEP@
+GL_GNULIB_SNPRINTF = @GL_GNULIB_SNPRINTF@
+GL_GNULIB_SOCKET = @GL_GNULIB_SOCKET@
+GL_GNULIB_SPRINTF_POSIX = @GL_GNULIB_SPRINTF_POSIX@
+GL_GNULIB_STAT = @GL_GNULIB_STAT@
+GL_GNULIB_STDIO_H_NONBLOCKING = @GL_GNULIB_STDIO_H_NONBLOCKING@
+GL_GNULIB_STDIO_H_SIGPIPE = @GL_GNULIB_STDIO_H_SIGPIPE@
+GL_GNULIB_STPCPY = @GL_GNULIB_STPCPY@
+GL_GNULIB_STPNCPY = @GL_GNULIB_STPNCPY@
+GL_GNULIB_STRCASESTR = @GL_GNULIB_STRCASESTR@
+GL_GNULIB_STRCHRNUL = @GL_GNULIB_STRCHRNUL@
+GL_GNULIB_STRDUP = @GL_GNULIB_STRDUP@
+GL_GNULIB_STRERROR = @GL_GNULIB_STRERROR@
+GL_GNULIB_STRERRORNAME_NP = @GL_GNULIB_STRERRORNAME_NP@
+GL_GNULIB_STRERROR_R = @GL_GNULIB_STRERROR_R@
+GL_GNULIB_STRFTIME = @GL_GNULIB_STRFTIME@
+GL_GNULIB_STRNCAT = @GL_GNULIB_STRNCAT@
+GL_GNULIB_STRNDUP = @GL_GNULIB_STRNDUP@
+GL_GNULIB_STRNLEN = @GL_GNULIB_STRNLEN@
+GL_GNULIB_STRPBRK = @GL_GNULIB_STRPBRK@
+GL_GNULIB_STRPTIME = @GL_GNULIB_STRPTIME@
+GL_GNULIB_STRSEP = @GL_GNULIB_STRSEP@
+GL_GNULIB_STRSIGNAL = @GL_GNULIB_STRSIGNAL@
+GL_GNULIB_STRSTR = @GL_GNULIB_STRSTR@
+GL_GNULIB_STRTOD = @GL_GNULIB_STRTOD@
+GL_GNULIB_STRTOIMAX = @GL_GNULIB_STRTOIMAX@
+GL_GNULIB_STRTOK_R = @GL_GNULIB_STRTOK_R@
+GL_GNULIB_STRTOL = @GL_GNULIB_STRTOL@
+GL_GNULIB_STRTOLD = @GL_GNULIB_STRTOLD@
+GL_GNULIB_STRTOLL = @GL_GNULIB_STRTOLL@
+GL_GNULIB_STRTOUL = @GL_GNULIB_STRTOUL@
+GL_GNULIB_STRTOULL = @GL_GNULIB_STRTOULL@
+GL_GNULIB_STRTOUMAX = @GL_GNULIB_STRTOUMAX@
+GL_GNULIB_STRVERSCMP = @GL_GNULIB_STRVERSCMP@
+GL_GNULIB_SYMLINK = @GL_GNULIB_SYMLINK@
+GL_GNULIB_SYMLINKAT = @GL_GNULIB_SYMLINKAT@
+GL_GNULIB_SYSTEM_POSIX = @GL_GNULIB_SYSTEM_POSIX@
+GL_GNULIB_TIMEGM = @GL_GNULIB_TIMEGM@
+GL_GNULIB_TIMESPEC_GET = @GL_GNULIB_TIMESPEC_GET@
+GL_GNULIB_TIME_R = @GL_GNULIB_TIME_R@
+GL_GNULIB_TIME_RZ = @GL_GNULIB_TIME_RZ@
+GL_GNULIB_TMPFILE = @GL_GNULIB_TMPFILE@
+GL_GNULIB_TOWCTRANS = @GL_GNULIB_TOWCTRANS@
+GL_GNULIB_TRUNCATE = @GL_GNULIB_TRUNCATE@
+GL_GNULIB_TTYNAME_R = @GL_GNULIB_TTYNAME_R@
+GL_GNULIB_TZSET = @GL_GNULIB_TZSET@
+GL_GNULIB_UNISTD_H_GETOPT = @GL_GNULIB_UNISTD_H_GETOPT@
+GL_GNULIB_UNISTD_H_NONBLOCKING = @GL_GNULIB_UNISTD_H_NONBLOCKING@
+GL_GNULIB_UNISTD_H_SIGPIPE = @GL_GNULIB_UNISTD_H_SIGPIPE@
+GL_GNULIB_UNLINK = @GL_GNULIB_UNLINK@
+GL_GNULIB_UNLINKAT = @GL_GNULIB_UNLINKAT@
+GL_GNULIB_UNLOCKPT = @GL_GNULIB_UNLOCKPT@
+GL_GNULIB_UNSETENV = @GL_GNULIB_UNSETENV@
+GL_GNULIB_USLEEP = @GL_GNULIB_USLEEP@
+GL_GNULIB_UTIMENSAT = @GL_GNULIB_UTIMENSAT@
+GL_GNULIB_VASPRINTF = @GL_GNULIB_VASPRINTF@
+GL_GNULIB_VDPRINTF = @GL_GNULIB_VDPRINTF@
+GL_GNULIB_VFPRINTF = @GL_GNULIB_VFPRINTF@
+GL_GNULIB_VFPRINTF_POSIX = @GL_GNULIB_VFPRINTF_POSIX@
+GL_GNULIB_VFSCANF = @GL_GNULIB_VFSCANF@
+GL_GNULIB_VPRINTF = @GL_GNULIB_VPRINTF@
+GL_GNULIB_VPRINTF_POSIX = @GL_GNULIB_VPRINTF_POSIX@
+GL_GNULIB_VSCANF = @GL_GNULIB_VSCANF@
+GL_GNULIB_VSNPRINTF = @GL_GNULIB_VSNPRINTF@
+GL_GNULIB_VSPRINTF_POSIX = @GL_GNULIB_VSPRINTF_POSIX@
+GL_GNULIB_WCPCPY = @GL_GNULIB_WCPCPY@
+GL_GNULIB_WCPNCPY = @GL_GNULIB_WCPNCPY@
+GL_GNULIB_WCRTOMB = @GL_GNULIB_WCRTOMB@
+GL_GNULIB_WCSCASECMP = @GL_GNULIB_WCSCASECMP@
+GL_GNULIB_WCSCAT = @GL_GNULIB_WCSCAT@
+GL_GNULIB_WCSCHR = @GL_GNULIB_WCSCHR@
+GL_GNULIB_WCSCMP = @GL_GNULIB_WCSCMP@
+GL_GNULIB_WCSCOLL = @GL_GNULIB_WCSCOLL@
+GL_GNULIB_WCSCPY = @GL_GNULIB_WCSCPY@
+GL_GNULIB_WCSCSPN = @GL_GNULIB_WCSCSPN@
+GL_GNULIB_WCSDUP = @GL_GNULIB_WCSDUP@
+GL_GNULIB_WCSFTIME = @GL_GNULIB_WCSFTIME@
+GL_GNULIB_WCSLEN = @GL_GNULIB_WCSLEN@
+GL_GNULIB_WCSNCASECMP = @GL_GNULIB_WCSNCASECMP@
+GL_GNULIB_WCSNCAT = @GL_GNULIB_WCSNCAT@
+GL_GNULIB_WCSNCMP = @GL_GNULIB_WCSNCMP@
+GL_GNULIB_WCSNCPY = @GL_GNULIB_WCSNCPY@
+GL_GNULIB_WCSNLEN = @GL_GNULIB_WCSNLEN@
+GL_GNULIB_WCSNRTOMBS = @GL_GNULIB_WCSNRTOMBS@
+GL_GNULIB_WCSPBRK = @GL_GNULIB_WCSPBRK@
+GL_GNULIB_WCSRCHR = @GL_GNULIB_WCSRCHR@
+GL_GNULIB_WCSRTOMBS = @GL_GNULIB_WCSRTOMBS@
+GL_GNULIB_WCSSPN = @GL_GNULIB_WCSSPN@
+GL_GNULIB_WCSSTR = @GL_GNULIB_WCSSTR@
+GL_GNULIB_WCSTOK = @GL_GNULIB_WCSTOK@
+GL_GNULIB_WCSWIDTH = @GL_GNULIB_WCSWIDTH@
+GL_GNULIB_WCSXFRM = @GL_GNULIB_WCSXFRM@
+GL_GNULIB_WCTOB = @GL_GNULIB_WCTOB@
+GL_GNULIB_WCTOMB = @GL_GNULIB_WCTOMB@
+GL_GNULIB_WCTRANS = @GL_GNULIB_WCTRANS@
+GL_GNULIB_WCTYPE = @GL_GNULIB_WCTYPE@
+GL_GNULIB_WCWIDTH = @GL_GNULIB_WCWIDTH@
+GL_GNULIB_WMEMCHR = @GL_GNULIB_WMEMCHR@
+GL_GNULIB_WMEMCMP = @GL_GNULIB_WMEMCMP@
+GL_GNULIB_WMEMCPY = @GL_GNULIB_WMEMCPY@
+GL_GNULIB_WMEMMOVE = @GL_GNULIB_WMEMMOVE@
+GL_GNULIB_WMEMPCPY = @GL_GNULIB_WMEMPCPY@
+GL_GNULIB_WMEMSET = @GL_GNULIB_WMEMSET@
+GL_GNULIB_WRITE = @GL_GNULIB_WRITE@
+GL_GNULIB__EXIT = @GL_GNULIB__EXIT@
+GMSGFMT = @GMSGFMT@
+GMSGFMT_015 = @GMSGFMT_015@
+GNULIBHEADERS_OVERRIDE_WINT_T = @GNULIBHEADERS_OVERRIDE_WINT_T@
+GNULIB_GETTIMEOFDAY = @GNULIB_GETTIMEOFDAY@
+GNULIB_TEST_WARN_CFLAGS = @GNULIB_TEST_WARN_CFLAGS@
+GNULIB_WARN_CFLAGS = @GNULIB_WARN_CFLAGS@
+GREP = @GREP@
+HAVE_ACCEPT4 = @HAVE_ACCEPT4@
+HAVE_ALIGNED_ALLOC = @HAVE_ALIGNED_ALLOC@
+HAVE_ALLOCA_H = @HAVE_ALLOCA_H@
+HAVE_ALPHASORT = @HAVE_ALPHASORT@
+HAVE_ARPA_INET_H = @HAVE_ARPA_INET_H@
+HAVE_ATOLL = @HAVE_ATOLL@
+HAVE_BTOWC = @HAVE_BTOWC@
+HAVE_C99_STDINT_H = @HAVE_C99_STDINT_H@
+HAVE_CANONICALIZE_FILE_NAME = @HAVE_CANONICALIZE_FILE_NAME@
+HAVE_CHOWN = @HAVE_CHOWN@
+HAVE_CLOSEDIR = @HAVE_CLOSEDIR@
+HAVE_COPY_FILE_RANGE = @HAVE_COPY_FILE_RANGE@
+HAVE_CRTDEFS_H = @HAVE_CRTDEFS_H@
+HAVE_DECL_DIRFD = @HAVE_DECL_DIRFD@
+HAVE_DECL_ECVT = @HAVE_DECL_ECVT@
+HAVE_DECL_ENVIRON = @HAVE_DECL_ENVIRON@
+HAVE_DECL_EXECVPE = @HAVE_DECL_EXECVPE@
+HAVE_DECL_FCHDIR = @HAVE_DECL_FCHDIR@
+HAVE_DECL_FCLOSEALL = @HAVE_DECL_FCLOSEALL@
+HAVE_DECL_FCVT = @HAVE_DECL_FCVT@
+HAVE_DECL_FDATASYNC = @HAVE_DECL_FDATASYNC@
+HAVE_DECL_FDOPENDIR = @HAVE_DECL_FDOPENDIR@
+HAVE_DECL_FPURGE = @HAVE_DECL_FPURGE@
+HAVE_DECL_FSEEKO = @HAVE_DECL_FSEEKO@
+HAVE_DECL_FTELLO = @HAVE_DECL_FTELLO@
+HAVE_DECL_GCVT = @HAVE_DECL_GCVT@
+HAVE_DECL_GETDELIM = @HAVE_DECL_GETDELIM@
+HAVE_DECL_GETDOMAINNAME = @HAVE_DECL_GETDOMAINNAME@
+HAVE_DECL_GETLINE = @HAVE_DECL_GETLINE@
+HAVE_DECL_GETLOADAVG = @HAVE_DECL_GETLOADAVG@
+HAVE_DECL_GETLOGIN = @HAVE_DECL_GETLOGIN@
+HAVE_DECL_GETLOGIN_R = @HAVE_DECL_GETLOGIN_R@
+HAVE_DECL_GETPAGESIZE = @HAVE_DECL_GETPAGESIZE@
+HAVE_DECL_GETUSERSHELL = @HAVE_DECL_GETUSERSHELL@
+HAVE_DECL_IMAXABS = @HAVE_DECL_IMAXABS@
+HAVE_DECL_IMAXDIV = @HAVE_DECL_IMAXDIV@
+HAVE_DECL_INET_NTOP = @HAVE_DECL_INET_NTOP@
+HAVE_DECL_INET_PTON = @HAVE_DECL_INET_PTON@
+HAVE_DECL_INITSTATE = @HAVE_DECL_INITSTATE@
+HAVE_DECL_LOCALTIME_R = @HAVE_DECL_LOCALTIME_R@
+HAVE_DECL_MEMMEM = @HAVE_DECL_MEMMEM@
+HAVE_DECL_MEMRCHR = @HAVE_DECL_MEMRCHR@
+HAVE_DECL_OBSTACK_PRINTF = @HAVE_DECL_OBSTACK_PRINTF@
+HAVE_DECL_SETENV = @HAVE_DECL_SETENV@
+HAVE_DECL_SETHOSTNAME = @HAVE_DECL_SETHOSTNAME@
+HAVE_DECL_SETSTATE = @HAVE_DECL_SETSTATE@
+HAVE_DECL_SNPRINTF = @HAVE_DECL_SNPRINTF@
+HAVE_DECL_STRDUP = @HAVE_DECL_STRDUP@
+HAVE_DECL_STRERROR_R = @HAVE_DECL_STRERROR_R@
+HAVE_DECL_STRNDUP = @HAVE_DECL_STRNDUP@
+HAVE_DECL_STRNLEN = @HAVE_DECL_STRNLEN@
+HAVE_DECL_STRSIGNAL = @HAVE_DECL_STRSIGNAL@
+HAVE_DECL_STRTOIMAX = @HAVE_DECL_STRTOIMAX@
+HAVE_DECL_STRTOK_R = @HAVE_DECL_STRTOK_R@
+HAVE_DECL_STRTOUMAX = @HAVE_DECL_STRTOUMAX@
+HAVE_DECL_TRUNCATE = @HAVE_DECL_TRUNCATE@
+HAVE_DECL_TTYNAME_R = @HAVE_DECL_TTYNAME_R@
+HAVE_DECL_UNSETENV = @HAVE_DECL_UNSETENV@
+HAVE_DECL_VSNPRINTF = @HAVE_DECL_VSNPRINTF@
+HAVE_DECL_WCSDUP = @HAVE_DECL_WCSDUP@
+HAVE_DECL_WCTOB = @HAVE_DECL_WCTOB@
+HAVE_DECL_WCWIDTH = @HAVE_DECL_WCWIDTH@
+HAVE_DIRENT_H = @HAVE_DIRENT_H@
+HAVE_DPRINTF = @HAVE_DPRINTF@
+HAVE_DUP3 = @HAVE_DUP3@
+HAVE_DUPLOCALE = @HAVE_DUPLOCALE@
+HAVE_EUIDACCESS = @HAVE_EUIDACCESS@
+HAVE_EXECVPE = @HAVE_EXECVPE@
+HAVE_EXPLICIT_BZERO = @HAVE_EXPLICIT_BZERO@
+HAVE_FACCESSAT = @HAVE_FACCESSAT@
+HAVE_FCHDIR = @HAVE_FCHDIR@
+HAVE_FCHMODAT = @HAVE_FCHMODAT@
+HAVE_FCHOWNAT = @HAVE_FCHOWNAT@
+HAVE_FCNTL = @HAVE_FCNTL@
+HAVE_FDATASYNC = @HAVE_FDATASYNC@
+HAVE_FDOPENDIR = @HAVE_FDOPENDIR@
+HAVE_FEATURES_H = @HAVE_FEATURES_H@
+HAVE_FFSL = @HAVE_FFSL@
+HAVE_FFSLL = @HAVE_FFSLL@
+HAVE_FNMATCH = @HAVE_FNMATCH@
+HAVE_FNMATCH_H = @HAVE_FNMATCH_H@
+HAVE_FREELOCALE = @HAVE_FREELOCALE@
+HAVE_FSEEKO = @HAVE_FSEEKO@
+HAVE_FSTATAT = @HAVE_FSTATAT@
+HAVE_FSYNC = @HAVE_FSYNC@
+HAVE_FTELLO = @HAVE_FTELLO@
+HAVE_FTRUNCATE = @HAVE_FTRUNCATE@
+HAVE_FUTIMENS = @HAVE_FUTIMENS@
+HAVE_GETDTABLESIZE = @HAVE_GETDTABLESIZE@
+HAVE_GETENTROPY = @HAVE_GETENTROPY@
+HAVE_GETGROUPS = @HAVE_GETGROUPS@
+HAVE_GETHOSTNAME = @HAVE_GETHOSTNAME@
+HAVE_GETLOGIN = @HAVE_GETLOGIN@
+HAVE_GETOPT_H = @HAVE_GETOPT_H@
+HAVE_GETPAGESIZE = @HAVE_GETPAGESIZE@
+HAVE_GETPASS = @HAVE_GETPASS@
+HAVE_GETSUBOPT = @HAVE_GETSUBOPT@
+HAVE_GETTIMEOFDAY = @HAVE_GETTIMEOFDAY@
+HAVE_GETUMASK = @HAVE_GETUMASK@
+HAVE_GRANTPT = @HAVE_GRANTPT@
+HAVE_GROUP_MEMBER = @HAVE_GROUP_MEMBER@
+HAVE_IMAXDIV_T = @HAVE_IMAXDIV_T@
+HAVE_INITSTATE = @HAVE_INITSTATE@
+HAVE_INTTYPES_H = @HAVE_INTTYPES_H@
+HAVE_ISBLANK = @HAVE_ISBLANK@
+HAVE_ISWBLANK = @HAVE_ISWBLANK@
+HAVE_ISWCNTRL = @HAVE_ISWCNTRL@
+HAVE_LANGINFO_ALTMON = @HAVE_LANGINFO_ALTMON@
+HAVE_LANGINFO_CODESET = @HAVE_LANGINFO_CODESET@
+HAVE_LANGINFO_ERA = @HAVE_LANGINFO_ERA@
+HAVE_LANGINFO_H = @HAVE_LANGINFO_H@
+HAVE_LANGINFO_T_FMT_AMPM = @HAVE_LANGINFO_T_FMT_AMPM@
+HAVE_LANGINFO_YESEXPR = @HAVE_LANGINFO_YESEXPR@
+HAVE_LCHMOD = @HAVE_LCHMOD@
+HAVE_LCHOWN = @HAVE_LCHOWN@
+HAVE_LIBSIGSEGV = @HAVE_LIBSIGSEGV@
+HAVE_LINK = @HAVE_LINK@
+HAVE_LINKAT = @HAVE_LINKAT@
+HAVE_LSTAT = @HAVE_LSTAT@
+HAVE_MAX_ALIGN_T = @HAVE_MAX_ALIGN_T@
+HAVE_MBRLEN = @HAVE_MBRLEN@
+HAVE_MBRTOWC = @HAVE_MBRTOWC@
+HAVE_MBSINIT = @HAVE_MBSINIT@
+HAVE_MBSLEN = @HAVE_MBSLEN@
+HAVE_MBSNRTOWCS = @HAVE_MBSNRTOWCS@
+HAVE_MBSRTOWCS = @HAVE_MBSRTOWCS@
+HAVE_MBTOWC = @HAVE_MBTOWC@
+HAVE_MEMPCPY = @HAVE_MEMPCPY@
+HAVE_MKDIRAT = @HAVE_MKDIRAT@
+HAVE_MKDTEMP = @HAVE_MKDTEMP@
+HAVE_MKFIFO = @HAVE_MKFIFO@
+HAVE_MKFIFOAT = @HAVE_MKFIFOAT@
+HAVE_MKNOD = @HAVE_MKNOD@
+HAVE_MKNODAT = @HAVE_MKNODAT@
+HAVE_MKOSTEMP = @HAVE_MKOSTEMP@
+HAVE_MKOSTEMPS = @HAVE_MKOSTEMPS@
+HAVE_MKSTEMP = @HAVE_MKSTEMP@
+HAVE_MKSTEMPS = @HAVE_MKSTEMPS@
+HAVE_MSVC_INVALID_PARAMETER_HANDLER = @HAVE_MSVC_INVALID_PARAMETER_HANDLER@
+HAVE_NANOSLEEP = @HAVE_NANOSLEEP@
+HAVE_NETINET_IN_H = @HAVE_NETINET_IN_H@
+HAVE_NEWLOCALE = @HAVE_NEWLOCALE@
+HAVE_NL_LANGINFO = @HAVE_NL_LANGINFO@
+HAVE_OPENAT = @HAVE_OPENAT@
+HAVE_OPENDIR = @HAVE_OPENDIR@
+HAVE_OS_H = @HAVE_OS_H@
+HAVE_PCLOSE = @HAVE_PCLOSE@
+HAVE_PIPE = @HAVE_PIPE@
+HAVE_PIPE2 = @HAVE_PIPE2@
+HAVE_POPEN = @HAVE_POPEN@
+HAVE_POSIX_MEMALIGN = @HAVE_POSIX_MEMALIGN@
+HAVE_POSIX_OPENPT = @HAVE_POSIX_OPENPT@
+HAVE_POSIX_SIGNALBLOCKING = @HAVE_POSIX_SIGNALBLOCKING@
+HAVE_PREAD = @HAVE_PREAD@
+HAVE_PSELECT = @HAVE_PSELECT@
+HAVE_PTHREAD_ATTR_DESTROY = @HAVE_PTHREAD_ATTR_DESTROY@
+HAVE_PTHREAD_ATTR_GETDETACHSTATE = @HAVE_PTHREAD_ATTR_GETDETACHSTATE@
+HAVE_PTHREAD_ATTR_INIT = @HAVE_PTHREAD_ATTR_INIT@
+HAVE_PTHREAD_ATTR_SETDETACHSTATE = @HAVE_PTHREAD_ATTR_SETDETACHSTATE@
+HAVE_PTHREAD_CONDATTR_DESTROY = @HAVE_PTHREAD_CONDATTR_DESTROY@
+HAVE_PTHREAD_CONDATTR_INIT = @HAVE_PTHREAD_CONDATTR_INIT@
+HAVE_PTHREAD_COND_BROADCAST = @HAVE_PTHREAD_COND_BROADCAST@
+HAVE_PTHREAD_COND_DESTROY = @HAVE_PTHREAD_COND_DESTROY@
+HAVE_PTHREAD_COND_INIT = @HAVE_PTHREAD_COND_INIT@
+HAVE_PTHREAD_COND_SIGNAL = @HAVE_PTHREAD_COND_SIGNAL@
+HAVE_PTHREAD_COND_TIMEDWAIT = @HAVE_PTHREAD_COND_TIMEDWAIT@
+HAVE_PTHREAD_COND_WAIT = @HAVE_PTHREAD_COND_WAIT@
+HAVE_PTHREAD_CREATE = @HAVE_PTHREAD_CREATE@
+HAVE_PTHREAD_CREATE_DETACHED = @HAVE_PTHREAD_CREATE_DETACHED@
+HAVE_PTHREAD_DETACH = @HAVE_PTHREAD_DETACH@
+HAVE_PTHREAD_EQUAL = @HAVE_PTHREAD_EQUAL@
+HAVE_PTHREAD_EXIT = @HAVE_PTHREAD_EXIT@
+HAVE_PTHREAD_GETSPECIFIC = @HAVE_PTHREAD_GETSPECIFIC@
+HAVE_PTHREAD_H = @HAVE_PTHREAD_H@
+HAVE_PTHREAD_JOIN = @HAVE_PTHREAD_JOIN@
+HAVE_PTHREAD_KEY_CREATE = @HAVE_PTHREAD_KEY_CREATE@
+HAVE_PTHREAD_KEY_DELETE = @HAVE_PTHREAD_KEY_DELETE@
+HAVE_PTHREAD_MUTEXATTR_DESTROY = @HAVE_PTHREAD_MUTEXATTR_DESTROY@
+HAVE_PTHREAD_MUTEXATTR_GETROBUST = @HAVE_PTHREAD_MUTEXATTR_GETROBUST@
+HAVE_PTHREAD_MUTEXATTR_GETTYPE = @HAVE_PTHREAD_MUTEXATTR_GETTYPE@
+HAVE_PTHREAD_MUTEXATTR_INIT = @HAVE_PTHREAD_MUTEXATTR_INIT@
+HAVE_PTHREAD_MUTEXATTR_SETROBUST = @HAVE_PTHREAD_MUTEXATTR_SETROBUST@
+HAVE_PTHREAD_MUTEXATTR_SETTYPE = @HAVE_PTHREAD_MUTEXATTR_SETTYPE@
+HAVE_PTHREAD_MUTEX_DESTROY = @HAVE_PTHREAD_MUTEX_DESTROY@
+HAVE_PTHREAD_MUTEX_INIT = @HAVE_PTHREAD_MUTEX_INIT@
+HAVE_PTHREAD_MUTEX_LOCK = @HAVE_PTHREAD_MUTEX_LOCK@
+HAVE_PTHREAD_MUTEX_RECURSIVE = @HAVE_PTHREAD_MUTEX_RECURSIVE@
+HAVE_PTHREAD_MUTEX_ROBUST = @HAVE_PTHREAD_MUTEX_ROBUST@
+HAVE_PTHREAD_MUTEX_TIMEDLOCK = @HAVE_PTHREAD_MUTEX_TIMEDLOCK@
+HAVE_PTHREAD_MUTEX_TRYLOCK = @HAVE_PTHREAD_MUTEX_TRYLOCK@
+HAVE_PTHREAD_MUTEX_UNLOCK = @HAVE_PTHREAD_MUTEX_UNLOCK@
+HAVE_PTHREAD_ONCE = @HAVE_PTHREAD_ONCE@
+HAVE_PTHREAD_PROCESS_SHARED = @HAVE_PTHREAD_PROCESS_SHARED@
+HAVE_PTHREAD_RWLOCKATTR_DESTROY = @HAVE_PTHREAD_RWLOCKATTR_DESTROY@
+HAVE_PTHREAD_RWLOCKATTR_INIT = @HAVE_PTHREAD_RWLOCKATTR_INIT@
+HAVE_PTHREAD_RWLOCK_DESTROY = @HAVE_PTHREAD_RWLOCK_DESTROY@
+HAVE_PTHREAD_RWLOCK_INIT = @HAVE_PTHREAD_RWLOCK_INIT@
+HAVE_PTHREAD_RWLOCK_RDLOCK = @HAVE_PTHREAD_RWLOCK_RDLOCK@
+HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK = @HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK@
+HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK = @HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK@
+HAVE_PTHREAD_RWLOCK_TRYRDLOCK = @HAVE_PTHREAD_RWLOCK_TRYRDLOCK@
+HAVE_PTHREAD_RWLOCK_TRYWRLOCK = @HAVE_PTHREAD_RWLOCK_TRYWRLOCK@
+HAVE_PTHREAD_RWLOCK_UNLOCK = @HAVE_PTHREAD_RWLOCK_UNLOCK@
+HAVE_PTHREAD_RWLOCK_WRLOCK = @HAVE_PTHREAD_RWLOCK_WRLOCK@
+HAVE_PTHREAD_SELF = @HAVE_PTHREAD_SELF@
+HAVE_PTHREAD_SETSPECIFIC = @HAVE_PTHREAD_SETSPECIFIC@
+HAVE_PTHREAD_SIGMASK = @HAVE_PTHREAD_SIGMASK@
+HAVE_PTHREAD_SPINLOCK_T = @HAVE_PTHREAD_SPINLOCK_T@
+HAVE_PTHREAD_SPIN_DESTROY = @HAVE_PTHREAD_SPIN_DESTROY@
+HAVE_PTHREAD_SPIN_INIT = @HAVE_PTHREAD_SPIN_INIT@
+HAVE_PTHREAD_SPIN_LOCK = @HAVE_PTHREAD_SPIN_LOCK@
+HAVE_PTHREAD_SPIN_TRYLOCK = @HAVE_PTHREAD_SPIN_TRYLOCK@
+HAVE_PTHREAD_SPIN_UNLOCK = @HAVE_PTHREAD_SPIN_UNLOCK@
+HAVE_PTHREAD_T = @HAVE_PTHREAD_T@
+HAVE_PTSNAME = @HAVE_PTSNAME@
+HAVE_PTSNAME_R = @HAVE_PTSNAME_R@
+HAVE_PWRITE = @HAVE_PWRITE@
+HAVE_QSORT_R = @HAVE_QSORT_R@
+HAVE_RAISE = @HAVE_RAISE@
+HAVE_RANDOM = @HAVE_RANDOM@
+HAVE_RANDOM_H = @HAVE_RANDOM_H@
+HAVE_RANDOM_R = @HAVE_RANDOM_R@
+HAVE_RAWMEMCHR = @HAVE_RAWMEMCHR@
+HAVE_READDIR = @HAVE_READDIR@
+HAVE_READLINK = @HAVE_READLINK@
+HAVE_READLINKAT = @HAVE_READLINKAT@
+HAVE_REALLOCARRAY = @HAVE_REALLOCARRAY@
+HAVE_REALPATH = @HAVE_REALPATH@
+HAVE_RENAMEAT = @HAVE_RENAMEAT@
+HAVE_REWINDDIR = @HAVE_REWINDDIR@
+HAVE_RPMATCH = @HAVE_RPMATCH@
+HAVE_SA_FAMILY_T = @HAVE_SA_FAMILY_T@
+HAVE_SCANDIR = @HAVE_SCANDIR@
+HAVE_SCHED_H = @HAVE_SCHED_H@
+HAVE_SCHED_YIELD = @HAVE_SCHED_YIELD@
+HAVE_SECURE_GETENV = @HAVE_SECURE_GETENV@
+HAVE_SETENV = @HAVE_SETENV@
+HAVE_SETHOSTNAME = @HAVE_SETHOSTNAME@
+HAVE_SETSTATE = @HAVE_SETSTATE@
+HAVE_SIGABBREV_NP = @HAVE_SIGABBREV_NP@
+HAVE_SIGACTION = @HAVE_SIGACTION@
+HAVE_SIGDESCR_NP = @HAVE_SIGDESCR_NP@
+HAVE_SIGHANDLER_T = @HAVE_SIGHANDLER_T@
+HAVE_SIGINFO_T = @HAVE_SIGINFO_T@
+HAVE_SIGNED_SIG_ATOMIC_T = @HAVE_SIGNED_SIG_ATOMIC_T@
+HAVE_SIGNED_WCHAR_T = @HAVE_SIGNED_WCHAR_T@
+HAVE_SIGNED_WINT_T = @HAVE_SIGNED_WINT_T@
+HAVE_SIGSET_T = @HAVE_SIGSET_T@
+HAVE_SLEEP = @HAVE_SLEEP@
+HAVE_STDINT_H = @HAVE_STDINT_H@
+HAVE_STPCPY = @HAVE_STPCPY@
+HAVE_STPNCPY = @HAVE_STPNCPY@
+HAVE_STRCASESTR = @HAVE_STRCASESTR@
+HAVE_STRCHRNUL = @HAVE_STRCHRNUL@
+HAVE_STRERRORNAME_NP = @HAVE_STRERRORNAME_NP@
+HAVE_STRPBRK = @HAVE_STRPBRK@
+HAVE_STRPTIME = @HAVE_STRPTIME@
+HAVE_STRSEP = @HAVE_STRSEP@
+HAVE_STRTOD = @HAVE_STRTOD@
+HAVE_STRTOL = @HAVE_STRTOL@
+HAVE_STRTOLD = @HAVE_STRTOLD@
+HAVE_STRTOLL = @HAVE_STRTOLL@
+HAVE_STRTOUL = @HAVE_STRTOUL@
+HAVE_STRTOULL = @HAVE_STRTOULL@
+HAVE_STRUCT_RANDOM_DATA = @HAVE_STRUCT_RANDOM_DATA@
+HAVE_STRUCT_SCHED_PARAM = @HAVE_STRUCT_SCHED_PARAM@
+HAVE_STRUCT_SIGACTION_SA_SIGACTION = @HAVE_STRUCT_SIGACTION_SA_SIGACTION@
+HAVE_STRUCT_SOCKADDR_STORAGE = @HAVE_STRUCT_SOCKADDR_STORAGE@
+HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY = @HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY@
+HAVE_STRUCT_TIMEVAL = @HAVE_STRUCT_TIMEVAL@
+HAVE_STRVERSCMP = @HAVE_STRVERSCMP@
+HAVE_SYMLINK = @HAVE_SYMLINK@
+HAVE_SYMLINKAT = @HAVE_SYMLINKAT@
+HAVE_SYS_BITYPES_H = @HAVE_SYS_BITYPES_H@
+HAVE_SYS_CDEFS_H = @HAVE_SYS_CDEFS_H@
+HAVE_SYS_INTTYPES_H = @HAVE_SYS_INTTYPES_H@
+HAVE_SYS_IOCTL_H = @HAVE_SYS_IOCTL_H@
+HAVE_SYS_LOADAVG_H = @HAVE_SYS_LOADAVG_H@
+HAVE_SYS_PARAM_H = @HAVE_SYS_PARAM_H@
+HAVE_SYS_SELECT_H = @HAVE_SYS_SELECT_H@
+HAVE_SYS_SOCKET_H = @HAVE_SYS_SOCKET_H@
+HAVE_SYS_TIME_H = @HAVE_SYS_TIME_H@
+HAVE_SYS_TYPES_H = @HAVE_SYS_TYPES_H@
+HAVE_SYS_UIO_H = @HAVE_SYS_UIO_H@
+HAVE_TIMEGM = @HAVE_TIMEGM@
+HAVE_TIMESPEC_GET = @HAVE_TIMESPEC_GET@
+HAVE_TIMEZONE_T = @HAVE_TIMEZONE_T@
+HAVE_TYPE_VOLATILE_SIG_ATOMIC_T = @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
+HAVE_UNISTD_H = @HAVE_UNISTD_H@
+HAVE_UNLINKAT = @HAVE_UNLINKAT@
+HAVE_UNLOCKPT = @HAVE_UNLOCKPT@
+HAVE_USLEEP = @HAVE_USLEEP@
+HAVE_UTIMENSAT = @HAVE_UTIMENSAT@
+HAVE_VASPRINTF = @HAVE_VASPRINTF@
+HAVE_VDPRINTF = @HAVE_VDPRINTF@
+HAVE_VISIBILITY = @HAVE_VISIBILITY@
+HAVE_WCHAR_H = @HAVE_WCHAR_H@
+HAVE_WCHAR_T = @HAVE_WCHAR_T@
+HAVE_WCPCPY = @HAVE_WCPCPY@
+HAVE_WCPNCPY = @HAVE_WCPNCPY@
+HAVE_WCRTOMB = @HAVE_WCRTOMB@
+HAVE_WCSCASECMP = @HAVE_WCSCASECMP@
+HAVE_WCSCAT = @HAVE_WCSCAT@
+HAVE_WCSCHR = @HAVE_WCSCHR@
+HAVE_WCSCMP = @HAVE_WCSCMP@
+HAVE_WCSCOLL = @HAVE_WCSCOLL@
+HAVE_WCSCPY = @HAVE_WCSCPY@
+HAVE_WCSCSPN = @HAVE_WCSCSPN@
+HAVE_WCSDUP = @HAVE_WCSDUP@
+HAVE_WCSFTIME = @HAVE_WCSFTIME@
+HAVE_WCSLEN = @HAVE_WCSLEN@
+HAVE_WCSNCASECMP = @HAVE_WCSNCASECMP@
+HAVE_WCSNCAT = @HAVE_WCSNCAT@
+HAVE_WCSNCMP = @HAVE_WCSNCMP@
+HAVE_WCSNCPY = @HAVE_WCSNCPY@
+HAVE_WCSNLEN = @HAVE_WCSNLEN@
+HAVE_WCSNRTOMBS = @HAVE_WCSNRTOMBS@
+HAVE_WCSPBRK = @HAVE_WCSPBRK@
+HAVE_WCSRCHR = @HAVE_WCSRCHR@
+HAVE_WCSRTOMBS = @HAVE_WCSRTOMBS@
+HAVE_WCSSPN = @HAVE_WCSSPN@
+HAVE_WCSSTR = @HAVE_WCSSTR@
+HAVE_WCSTOK = @HAVE_WCSTOK@
+HAVE_WCSWIDTH = @HAVE_WCSWIDTH@
+HAVE_WCSXFRM = @HAVE_WCSXFRM@
+HAVE_WCTRANS_T = @HAVE_WCTRANS_T@
+HAVE_WCTYPE_H = @HAVE_WCTYPE_H@
+HAVE_WCTYPE_T = @HAVE_WCTYPE_T@
+HAVE_WINSOCK2_H = @HAVE_WINSOCK2_H@
+HAVE_WINT_T = @HAVE_WINT_T@
+HAVE_WMEMCHR = @HAVE_WMEMCHR@
+HAVE_WMEMCMP = @HAVE_WMEMCMP@
+HAVE_WMEMCPY = @HAVE_WMEMCPY@
+HAVE_WMEMMOVE = @HAVE_WMEMMOVE@
+HAVE_WMEMPCPY = @HAVE_WMEMPCPY@
+HAVE_WMEMSET = @HAVE_WMEMSET@
+HAVE_WS2TCPIP_H = @HAVE_WS2TCPIP_H@
+HAVE_XLOCALE_H = @HAVE_XLOCALE_H@
+HAVE__BOOL = @HAVE__BOOL@
+HAVE__EXIT = @HAVE__EXIT@
+HOST_CPU = @HOST_CPU@
+HOST_CPU_C_ABI = @HOST_CPU_C_ABI@
+ICONV_CONST = @ICONV_CONST@
+ICONV_H = @ICONV_H@
+INCLUDE_NEXT = @INCLUDE_NEXT@
+INCLUDE_NEXT_AS_FIRST_DIRECTIVE = @INCLUDE_NEXT_AS_FIRST_DIRECTIVE@
+INET_PTON_LIB = @INET_PTON_LIB@
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+INT32_MAX_LT_INTMAX_MAX = @INT32_MAX_LT_INTMAX_MAX@
+INT64_MAX_EQ_LONG_MAX = @INT64_MAX_EQ_LONG_MAX@
+INTLLIBS = @INTLLIBS@
+INTL_MACOSX_LIBS = @INTL_MACOSX_LIBS@
+LDFLAGS = @LDFLAGS@
+LIBCSTACK = @LIBCSTACK@
+LIBGREPUTILS_LIBDEPS = @LIBGREPUTILS_LIBDEPS@
+LIBGREPUTILS_LTLIBDEPS = @LIBGREPUTILS_LTLIBDEPS@
+LIBICONV = @LIBICONV@
+LIBINTL = @LIBINTL@
+LIBMULTITHREAD = @LIBMULTITHREAD@
+LIBOBJS = @LIBOBJS@
+LIBPMULTITHREAD = @LIBPMULTITHREAD@
+LIBPTHREAD = @LIBPTHREAD@
+LIBS = @LIBS@
+LIBSIGSEGV = @LIBSIGSEGV@
+LIBSIGSEGV_PREFIX = @LIBSIGSEGV_PREFIX@
+LIBSOCKET = @LIBSOCKET@
+LIBSTDTHREAD = @LIBSTDTHREAD@
+LIBTESTS_LIBDEPS = @LIBTESTS_LIBDEPS@
+LIBTHREAD = @LIBTHREAD@
+LIBUNISTRING_UNISTR_H = @LIBUNISTRING_UNISTR_H@
+LIBUNISTRING_UNITYPES_H = @LIBUNISTRING_UNITYPES_H@
+LIBUNISTRING_UNIWIDTH_H = @LIBUNISTRING_UNIWIDTH_H@
+LIB_HARD_LOCALE = @LIB_HARD_LOCALE@
+LIB_MBRTOWC = @LIB_MBRTOWC@
+LIB_NANOSLEEP = @LIB_NANOSLEEP@
+LIB_NL_LANGINFO = @LIB_NL_LANGINFO@
+LIB_PTHREAD = @LIB_PTHREAD@
+LIB_PTHREAD_SIGMASK = @LIB_PTHREAD_SIGMASK@
+LIB_SCHED_YIELD = @LIB_SCHED_YIELD@
+LIB_SELECT = @LIB_SELECT@
+LIB_SETLOCALE = @LIB_SETLOCALE@
+LIB_SETLOCALE_NULL = @LIB_SETLOCALE_NULL@
+LIMITS_H = @LIMITS_H@
+LOCALCHARSET_TESTS_ENVIRONMENT = @LOCALCHARSET_TESTS_ENVIRONMENT@
+LOCALENAME_ENHANCE_LOCALE_FUNCS = @LOCALENAME_ENHANCE_LOCALE_FUNCS@
+LOCALE_FR = @LOCALE_FR@
+LOCALE_FR_UTF8 = @LOCALE_FR_UTF8@
+LOCALE_JA = @LOCALE_JA@
+LOCALE_TR_UTF8 = @LOCALE_TR_UTF8@
+LOCALE_ZH_CN = @LOCALE_ZH_CN@
+LTLIBCSTACK = @LTLIBCSTACK@
+LTLIBICONV = @LTLIBICONV@
+LTLIBINTL = @LTLIBINTL@
+LTLIBMULTITHREAD = @LTLIBMULTITHREAD@
+LTLIBOBJS = @LTLIBOBJS@
+LTLIBSIGSEGV = @LTLIBSIGSEGV@
+LTLIBTHREAD = @LTLIBTHREAD@
+MAKEINFO = @MAKEINFO@
+MKDIR_P = @MKDIR_P@
+MSGFMT = @MSGFMT@
+MSGFMT_015 = @MSGFMT_015@
+MSGMERGE = @MSGMERGE@
+NETINET_IN_H = @NETINET_IN_H@
+NEXT_ARPA_INET_H = @NEXT_ARPA_INET_H@
+NEXT_AS_FIRST_DIRECTIVE_ARPA_INET_H = @NEXT_AS_FIRST_DIRECTIVE_ARPA_INET_H@
+NEXT_AS_FIRST_DIRECTIVE_CTYPE_H = @NEXT_AS_FIRST_DIRECTIVE_CTYPE_H@
+NEXT_AS_FIRST_DIRECTIVE_DIRENT_H = @NEXT_AS_FIRST_DIRECTIVE_DIRENT_H@
+NEXT_AS_FIRST_DIRECTIVE_ERRNO_H = @NEXT_AS_FIRST_DIRECTIVE_ERRNO_H@
+NEXT_AS_FIRST_DIRECTIVE_FCNTL_H = @NEXT_AS_FIRST_DIRECTIVE_FCNTL_H@
+NEXT_AS_FIRST_DIRECTIVE_FLOAT_H = @NEXT_AS_FIRST_DIRECTIVE_FLOAT_H@
+NEXT_AS_FIRST_DIRECTIVE_FNMATCH_H = @NEXT_AS_FIRST_DIRECTIVE_FNMATCH_H@
+NEXT_AS_FIRST_DIRECTIVE_GETOPT_H = @NEXT_AS_FIRST_DIRECTIVE_GETOPT_H@
+NEXT_AS_FIRST_DIRECTIVE_ICONV_H = @NEXT_AS_FIRST_DIRECTIVE_ICONV_H@
+NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H = @NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H@
+NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H = @NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H@
+NEXT_AS_FIRST_DIRECTIVE_LIMITS_H = @NEXT_AS_FIRST_DIRECTIVE_LIMITS_H@
+NEXT_AS_FIRST_DIRECTIVE_LOCALE_H = @NEXT_AS_FIRST_DIRECTIVE_LOCALE_H@
+NEXT_AS_FIRST_DIRECTIVE_NETINET_IN_H = @NEXT_AS_FIRST_DIRECTIVE_NETINET_IN_H@
+NEXT_AS_FIRST_DIRECTIVE_PTHREAD_H = @NEXT_AS_FIRST_DIRECTIVE_PTHREAD_H@
+NEXT_AS_FIRST_DIRECTIVE_SCHED_H = @NEXT_AS_FIRST_DIRECTIVE_SCHED_H@
+NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H = @NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H@
+NEXT_AS_FIRST_DIRECTIVE_STDARG_H = @NEXT_AS_FIRST_DIRECTIVE_STDARG_H@
+NEXT_AS_FIRST_DIRECTIVE_STDDEF_H = @NEXT_AS_FIRST_DIRECTIVE_STDDEF_H@
+NEXT_AS_FIRST_DIRECTIVE_STDINT_H = @NEXT_AS_FIRST_DIRECTIVE_STDINT_H@
+NEXT_AS_FIRST_DIRECTIVE_STDIO_H = @NEXT_AS_FIRST_DIRECTIVE_STDIO_H@
+NEXT_AS_FIRST_DIRECTIVE_STDLIB_H = @NEXT_AS_FIRST_DIRECTIVE_STDLIB_H@
+NEXT_AS_FIRST_DIRECTIVE_STRING_H = @NEXT_AS_FIRST_DIRECTIVE_STRING_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H@
+NEXT_AS_FIRST_DIRECTIVE_TIME_H = @NEXT_AS_FIRST_DIRECTIVE_TIME_H@
+NEXT_AS_FIRST_DIRECTIVE_UNISTD_H = @NEXT_AS_FIRST_DIRECTIVE_UNISTD_H@
+NEXT_AS_FIRST_DIRECTIVE_WCHAR_H = @NEXT_AS_FIRST_DIRECTIVE_WCHAR_H@
+NEXT_AS_FIRST_DIRECTIVE_WCTYPE_H = @NEXT_AS_FIRST_DIRECTIVE_WCTYPE_H@
+NEXT_CTYPE_H = @NEXT_CTYPE_H@
+NEXT_DIRENT_H = @NEXT_DIRENT_H@
+NEXT_ERRNO_H = @NEXT_ERRNO_H@
+NEXT_FCNTL_H = @NEXT_FCNTL_H@
+NEXT_FLOAT_H = @NEXT_FLOAT_H@
+NEXT_FNMATCH_H = @NEXT_FNMATCH_H@
+NEXT_GETOPT_H = @NEXT_GETOPT_H@
+NEXT_ICONV_H = @NEXT_ICONV_H@
+NEXT_INTTYPES_H = @NEXT_INTTYPES_H@
+NEXT_LANGINFO_H = @NEXT_LANGINFO_H@
+NEXT_LIMITS_H = @NEXT_LIMITS_H@
+NEXT_LOCALE_H = @NEXT_LOCALE_H@
+NEXT_NETINET_IN_H = @NEXT_NETINET_IN_H@
+NEXT_PTHREAD_H = @NEXT_PTHREAD_H@
+NEXT_SCHED_H = @NEXT_SCHED_H@
+NEXT_SIGNAL_H = @NEXT_SIGNAL_H@
+NEXT_STDARG_H = @NEXT_STDARG_H@
+NEXT_STDDEF_H = @NEXT_STDDEF_H@
+NEXT_STDINT_H = @NEXT_STDINT_H@
+NEXT_STDIO_H = @NEXT_STDIO_H@
+NEXT_STDLIB_H = @NEXT_STDLIB_H@
+NEXT_STRING_H = @NEXT_STRING_H@
+NEXT_SYS_IOCTL_H = @NEXT_SYS_IOCTL_H@
+NEXT_SYS_SELECT_H = @NEXT_SYS_SELECT_H@
+NEXT_SYS_SOCKET_H = @NEXT_SYS_SOCKET_H@
+NEXT_SYS_STAT_H = @NEXT_SYS_STAT_H@
+NEXT_SYS_TIME_H = @NEXT_SYS_TIME_H@
+NEXT_SYS_TYPES_H = @NEXT_SYS_TYPES_H@
+NEXT_SYS_UIO_H = @NEXT_SYS_UIO_H@
+NEXT_TIME_H = @NEXT_TIME_H@
+NEXT_UNISTD_H = @NEXT_UNISTD_H@
+NEXT_WCHAR_H = @NEXT_WCHAR_H@
+NEXT_WCTYPE_H = @NEXT_WCTYPE_H@
+OBJEXT = @OBJEXT@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_STRING = @PACKAGE_STRING@
+PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+PCRE_CFLAGS = @PCRE_CFLAGS@
+PCRE_LIBS = @PCRE_LIBS@
+PERL = @PERL@
+PKG_CONFIG = @PKG_CONFIG@
+PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@
+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
+POSUB = @POSUB@
+PRAGMA_COLUMNS = @PRAGMA_COLUMNS@
+PRAGMA_SYSTEM_HEADER = @PRAGMA_SYSTEM_HEADER@
+PRIPTR_PREFIX = @PRIPTR_PREFIX@
+PTHREAD_H_DEFINES_STRUCT_TIMESPEC = @PTHREAD_H_DEFINES_STRUCT_TIMESPEC@
+PTRDIFF_T_SUFFIX = @PTRDIFF_T_SUFFIX@
+RANLIB = @RANLIB@
+REPLACE_ACCESS = @REPLACE_ACCESS@
+REPLACE_ALIGNED_ALLOC = @REPLACE_ALIGNED_ALLOC@
+REPLACE_BTOWC = @REPLACE_BTOWC@
+REPLACE_CALLOC = @REPLACE_CALLOC@
+REPLACE_CANONICALIZE_FILE_NAME = @REPLACE_CANONICALIZE_FILE_NAME@
+REPLACE_CHOWN = @REPLACE_CHOWN@
+REPLACE_CLOSE = @REPLACE_CLOSE@
+REPLACE_CLOSEDIR = @REPLACE_CLOSEDIR@
+REPLACE_CREAT = @REPLACE_CREAT@
+REPLACE_CTIME = @REPLACE_CTIME@
+REPLACE_DIRFD = @REPLACE_DIRFD@
+REPLACE_DPRINTF = @REPLACE_DPRINTF@
+REPLACE_DUP = @REPLACE_DUP@
+REPLACE_DUP2 = @REPLACE_DUP2@
+REPLACE_DUPLOCALE = @REPLACE_DUPLOCALE@
+REPLACE_EXECL = @REPLACE_EXECL@
+REPLACE_EXECLE = @REPLACE_EXECLE@
+REPLACE_EXECLP = @REPLACE_EXECLP@
+REPLACE_EXECV = @REPLACE_EXECV@
+REPLACE_EXECVE = @REPLACE_EXECVE@
+REPLACE_EXECVP = @REPLACE_EXECVP@
+REPLACE_EXECVPE = @REPLACE_EXECVPE@
+REPLACE_FACCESSAT = @REPLACE_FACCESSAT@
+REPLACE_FCHMODAT = @REPLACE_FCHMODAT@
+REPLACE_FCHOWNAT = @REPLACE_FCHOWNAT@
+REPLACE_FCLOSE = @REPLACE_FCLOSE@
+REPLACE_FCNTL = @REPLACE_FCNTL@
+REPLACE_FDOPEN = @REPLACE_FDOPEN@
+REPLACE_FDOPENDIR = @REPLACE_FDOPENDIR@
+REPLACE_FFLUSH = @REPLACE_FFLUSH@
+REPLACE_FFSLL = @REPLACE_FFSLL@
+REPLACE_FNMATCH = @REPLACE_FNMATCH@
+REPLACE_FOPEN = @REPLACE_FOPEN@
+REPLACE_FPRINTF = @REPLACE_FPRINTF@
+REPLACE_FPURGE = @REPLACE_FPURGE@
+REPLACE_FREE = @REPLACE_FREE@
+REPLACE_FREELOCALE = @REPLACE_FREELOCALE@
+REPLACE_FREOPEN = @REPLACE_FREOPEN@
+REPLACE_FSEEK = @REPLACE_FSEEK@
+REPLACE_FSEEKO = @REPLACE_FSEEKO@
+REPLACE_FSTAT = @REPLACE_FSTAT@
+REPLACE_FSTATAT = @REPLACE_FSTATAT@
+REPLACE_FTELL = @REPLACE_FTELL@
+REPLACE_FTELLO = @REPLACE_FTELLO@
+REPLACE_FTRUNCATE = @REPLACE_FTRUNCATE@
+REPLACE_FUTIMENS = @REPLACE_FUTIMENS@
+REPLACE_GETCWD = @REPLACE_GETCWD@
+REPLACE_GETDELIM = @REPLACE_GETDELIM@
+REPLACE_GETDOMAINNAME = @REPLACE_GETDOMAINNAME@
+REPLACE_GETDTABLESIZE = @REPLACE_GETDTABLESIZE@
+REPLACE_GETGROUPS = @REPLACE_GETGROUPS@
+REPLACE_GETLINE = @REPLACE_GETLINE@
+REPLACE_GETLOGIN_R = @REPLACE_GETLOGIN_R@
+REPLACE_GETPAGESIZE = @REPLACE_GETPAGESIZE@
+REPLACE_GETPASS = @REPLACE_GETPASS@
+REPLACE_GETTIMEOFDAY = @REPLACE_GETTIMEOFDAY@
+REPLACE_GMTIME = @REPLACE_GMTIME@
+REPLACE_ICONV = @REPLACE_ICONV@
+REPLACE_ICONV_OPEN = @REPLACE_ICONV_OPEN@
+REPLACE_ICONV_UTF = @REPLACE_ICONV_UTF@
+REPLACE_INET_NTOP = @REPLACE_INET_NTOP@
+REPLACE_INET_PTON = @REPLACE_INET_PTON@
+REPLACE_INITSTATE = @REPLACE_INITSTATE@
+REPLACE_IOCTL = @REPLACE_IOCTL@
+REPLACE_ISATTY = @REPLACE_ISATTY@
+REPLACE_ISWBLANK = @REPLACE_ISWBLANK@
+REPLACE_ISWCNTRL = @REPLACE_ISWCNTRL@
+REPLACE_ISWDIGIT = @REPLACE_ISWDIGIT@
+REPLACE_ISWXDIGIT = @REPLACE_ISWXDIGIT@
+REPLACE_ITOLD = @REPLACE_ITOLD@
+REPLACE_LCHOWN = @REPLACE_LCHOWN@
+REPLACE_LINK = @REPLACE_LINK@
+REPLACE_LINKAT = @REPLACE_LINKAT@
+REPLACE_LOCALECONV = @REPLACE_LOCALECONV@
+REPLACE_LOCALTIME = @REPLACE_LOCALTIME@
+REPLACE_LOCALTIME_R = @REPLACE_LOCALTIME_R@
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+REPLACE_PTHREAD_MUTEXATTR_INIT = @REPLACE_PTHREAD_MUTEXATTR_INIT@
+REPLACE_PTHREAD_MUTEXATTR_SETROBUST = @REPLACE_PTHREAD_MUTEXATTR_SETROBUST@
+REPLACE_PTHREAD_MUTEXATTR_SETTYPE = @REPLACE_PTHREAD_MUTEXATTR_SETTYPE@
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+REPLACE_PTHREAD_RWLOCK_TRYRDLOCK = @REPLACE_PTHREAD_RWLOCK_TRYRDLOCK@
+REPLACE_PTHREAD_RWLOCK_TRYWRLOCK = @REPLACE_PTHREAD_RWLOCK_TRYWRLOCK@
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+REPLACE_SETSTATE = @REPLACE_SETSTATE@
+REPLACE_SLEEP = @REPLACE_SLEEP@
+REPLACE_SNPRINTF = @REPLACE_SNPRINTF@
+REPLACE_SPRINTF = @REPLACE_SPRINTF@
+REPLACE_STAT = @REPLACE_STAT@
+REPLACE_STDIO_READ_FUNCS = @REPLACE_STDIO_READ_FUNCS@
+REPLACE_STDIO_WRITE_FUNCS = @REPLACE_STDIO_WRITE_FUNCS@
+REPLACE_STPNCPY = @REPLACE_STPNCPY@
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+REPLACE_STRERRORNAME_NP = @REPLACE_STRERRORNAME_NP@
+REPLACE_STRERROR_R = @REPLACE_STRERROR_R@
+REPLACE_STRFTIME = @REPLACE_STRFTIME@
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+REPLACE_TMPFILE = @REPLACE_TMPFILE@
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+SYS_TIME_H_DEFINES_STRUCT_TIMESPEC = @SYS_TIME_H_DEFINES_STRUCT_TIMESPEC@
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+UNISTD_H_HAVE_SYS_RANDOM_H = @UNISTD_H_HAVE_SYS_RANDOM_H@
+UNISTD_H_HAVE_WINSOCK2_H = @UNISTD_H_HAVE_WINSOCK2_H@
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+WINDOWS_STAT_INODES = @WINDOWS_STAT_INODES@
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+gltests_WITNESS = @gltests_WITNESS@
+host = @host@
+host_alias = @host_alias@
+host_cpu = @host_cpu@
+host_os = @host_os@
+host_vendor = @host_vendor@
+htmldir = @htmldir@
+includedir = @includedir@
+infodir = @infodir@
+install_sh = @install_sh@
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+pdfdir = @pdfdir@
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+top_srcdir = @top_srcdir@
+info_TEXINFOS = grep.texi
+grep_TEXINFOS = fdl.texi
+man_MANS = grep.1 fgrep.1 egrep.1
+EXTRA_DIST = grep.in.1
+CLEANFILES = grep.1 egrep.1 fgrep.1
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .dvi .html .info .pdf .ps .texi
+$(srcdir)/Makefile.in:  $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu doc/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu doc/Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure:  $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4):  $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+.texi.info:
+	$(AM_V_MAKEINFO)restore=: && backupdir="$(am__leading_dot)am$$$$" && \
+	am__cwd=`pwd` && $(am__cd) $(srcdir) && \
+	rm -rf $$backupdir && mkdir $$backupdir && \
+	if ($(MAKEINFO) --version) >/dev/null 2>&1; then \
+	  for f in $@ $@-[0-9] $@-[0-9][0-9] $(@:.info=).i[0-9] $(@:.info=).i[0-9][0-9]; do \
+	    if test -f $$f; then mv $$f $$backupdir; restore=mv; else :; fi; \
+	  done; \
+	else :; fi && \
+	cd "$$am__cwd"; \
+	if $(MAKEINFO) $(AM_MAKEINFOFLAGS) $(MAKEINFOFLAGS) -I $(srcdir) \
+	 -o $@ $<; \
+	then \
+	  rc=0; \
+	  $(am__cd) $(srcdir); \
+	else \
+	  rc=$$?; \
+	  $(am__cd) $(srcdir) && \
+	  $$restore $$backupdir/* `echo "./$@" | sed 's|[^/]*$$||'`; \
+	fi; \
+	rm -rf $$backupdir; exit $$rc
+
+.texi.dvi:
+	$(AM_V_TEXI2DVI)TEXINPUTS="$(am__TEXINFO_TEX_DIR)$(PATH_SEPARATOR)$$TEXINPUTS" \
+	MAKEINFO='$(MAKEINFO) $(AM_MAKEINFOFLAGS) $(MAKEINFOFLAGS) -I $(srcdir)' \
+	$(TEXI2DVI) $(AM_V_texinfo) --build-dir=$(@:.dvi=.t2d) -o $@ $(AM_V_texidevnull) \
+	$<
+
+.texi.pdf:
+	$(AM_V_TEXI2PDF)TEXINPUTS="$(am__TEXINFO_TEX_DIR)$(PATH_SEPARATOR)$$TEXINPUTS" \
+	MAKEINFO='$(MAKEINFO) $(AM_MAKEINFOFLAGS) $(MAKEINFOFLAGS) -I $(srcdir)' \
+	$(TEXI2PDF) $(AM_V_texinfo) --build-dir=$(@:.pdf=.t2p) -o $@ $(AM_V_texidevnull) \
+	$<
+
+.texi.html:
+	$(AM_V_MAKEINFO)rm -rf $(@:.html=.htp)
+	$(AM_V_at)if $(MAKEINFOHTML) $(AM_MAKEINFOHTMLFLAGS) $(MAKEINFOFLAGS) -I $(srcdir) \
+	 -o $(@:.html=.htp) $<; \
+	then \
+	  rm -rf $@ && mv $(@:.html=.htp) $@; \
+	else \
+	  rm -rf $(@:.html=.htp); exit 1; \
+	fi
+$(srcdir)/grep.info: grep.texi $(srcdir)/version.texi $(grep_TEXINFOS)
+grep.dvi: grep.texi $(srcdir)/version.texi $(grep_TEXINFOS)
+grep.pdf: grep.texi $(srcdir)/version.texi $(grep_TEXINFOS)
+grep.html: grep.texi $(srcdir)/version.texi $(grep_TEXINFOS)
+$(srcdir)/version.texi:  $(srcdir)/stamp-vti
+$(srcdir)/stamp-vti: grep.texi $(top_srcdir)/configure
+	@(dir=.; test -f ./grep.texi || dir=$(srcdir); \
+	set `$(SHELL) $(top_srcdir)/build-aux/mdate-sh $$dir/grep.texi`; \
+	echo "@set UPDATED $$1 $$2 $$3"; \
+	echo "@set UPDATED-MONTH $$2 $$3"; \
+	echo "@set EDITION $(VERSION)"; \
+	echo "@set VERSION $(VERSION)") > vti.tmp$$$$ && \
+	(cmp -s vti.tmp$$$$ $(srcdir)/version.texi \
+	  || (echo "Updating $(srcdir)/version.texi" && \
+	      cp vti.tmp$$$$ $(srcdir)/version.texi.tmp$$$$ && \
+	      mv $(srcdir)/version.texi.tmp$$$$ $(srcdir)/version.texi)) && \
+	rm -f vti.tmp$$$$ $(srcdir)/version.texi.$$$$
+	@cp $(srcdir)/version.texi $@
+
+mostlyclean-vti:
+	-rm -f vti.tmp* $(srcdir)/version.texi.tmp*
+
+maintainer-clean-vti:
+	-rm -f $(srcdir)/stamp-vti $(srcdir)/version.texi
+.dvi.ps:
+	$(AM_V_DVIPS)TEXINPUTS="$(am__TEXINFO_TEX_DIR)$(PATH_SEPARATOR)$$TEXINPUTS" \
+	$(DVIPS) $(AM_V_texinfo) -o $@ $<
+
+uninstall-dvi-am:
+	@$(NORMAL_UNINSTALL)
+	@list='$(DVIS)'; test -n "$(dvidir)" || list=; \
+	for p in $$list; do \
+	  $(am__strip_dir) \
+	  echo " rm -f '$(DESTDIR)$(dvidir)/$$f'"; \
+	  rm -f "$(DESTDIR)$(dvidir)/$$f"; \
+	done
+
+uninstall-html-am:
+	@$(NORMAL_UNINSTALL)
+	@list='$(HTMLS)'; test -n "$(htmldir)" || list=; \
+	for p in $$list; do \
+	  $(am__strip_dir) \
+	  echo " rm -rf '$(DESTDIR)$(htmldir)/$$f'"; \
+	  rm -rf "$(DESTDIR)$(htmldir)/$$f"; \
+	done
+
+uninstall-info-am:
+	@$(PRE_UNINSTALL)
+	@if test -d '$(DESTDIR)$(infodir)' && $(am__can_run_installinfo); then \
+	  list='$(INFO_DEPS)'; \
+	  for file in $$list; do \
+	    relfile=`echo "$$file" | sed 's|^.*/||'`; \
+	    echo " install-info --info-dir='$(DESTDIR)$(infodir)' --remove '$(DESTDIR)$(infodir)/$$relfile'"; \
+	    if install-info --info-dir="$(DESTDIR)$(infodir)" --remove "$(DESTDIR)$(infodir)/$$relfile"; \
+	    then :; else test ! -f "$(DESTDIR)$(infodir)/$$relfile" || exit 1; fi; \
+	  done; \
+	else :; fi
+	@$(NORMAL_UNINSTALL)
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+	list='$(INFO_DEPS)'; \
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+	    $(srcdir)/*) base=`echo "$$base" | sed "s|^$$srcdirstrip/||"`;; \
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+
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+	maintainer-clean-generic maintainer-clean-vti
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+.MAKE: install-am install-strip
+
+.PHONY: all all-am check check-am clean clean-aminfo clean-generic \
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+	uninstall-man uninstall-man1 uninstall-pdf-am uninstall-ps-am
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+.PRECIOUS: Makefile
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+
+grep.1: grep.in.1
+	$(AM_V_GEN)rm -f $@-t $@
+	$(AM_V_at)sed 's/@''VERSION@/$(VERSION)/' $(srcdir)/grep.in.1 > $@-t
+	$(AM_V_at)chmod a=r $@-t
+	$(AM_V_at)mv -f $@-t $@
+
+egrep.1 fgrep.1: Makefile.am
+	$(AM_V_GEN)rm -f $@-t $@
+	$(AM_V_at)inst=`echo grep | sed '$(transform)'`.1 \
+	  && echo ".so man1/$$inst" > $@-t
+	$(AM_V_at)chmod a=r $@-t
+	$(AM_V_at)mv -f $@-t $@
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/grep/doc/fdl.texi b/src/grep/doc/fdl.texi
new file mode 100644
index 0000000..eaf3da0
--- /dev/null
+++ b/src/grep/doc/fdl.texi
@@ -0,0 +1,505 @@
+@c The GNU Free Documentation License.
+@center Version 1.3, 3 November 2008
+
+@c This file is intended to be included within another document,
+@c hence no sectioning command or @node.
+
+@display
+Copyright @copyright{} 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
+@uref{https://fsf.org/}
+
+Everyone is permitted to copy and distribute verbatim copies
+of this license document, but changing it is not allowed.
+@end display
+
+@enumerate 0
+@item
+PREAMBLE
+
+The purpose of this License is to make a manual, textbook, or other
+functional and useful document @dfn{free} in the sense of freedom: to
+assure everyone the effective freedom to copy and redistribute it,
+with or without modifying it, either commercially or noncommercially.
+Secondarily, this License preserves for the author and publisher a way
+to get credit for their work, while not being considered responsible
+for modifications made by others.
+
+This License is a kind of ``copyleft'', which means that derivative
+works of the document must themselves be free in the same sense.  It
+complements the GNU General Public License, which is a copyleft
+license designed for free software.
+
+We have designed this License in order to use it for manuals for free
+software, because free software needs free documentation: a free
+program should come with manuals providing the same freedoms that the
+software does.  But this License is not limited to software manuals;
+it can be used for any textual work, regardless of subject matter or
+whether it is published as a printed book.  We recommend this License
+principally for works whose purpose is instruction or reference.
+
+@item
+APPLICABILITY AND DEFINITIONS
+
+This License applies to any manual or other work, in any medium, that
+contains a notice placed by the copyright holder saying it can be
+distributed under the terms of this License.  Such a notice grants a
+world-wide, royalty-free license, unlimited in duration, to use that
+work under the conditions stated herein.  The ``Document'', below,
+refers to any such manual or work.  Any member of the public is a
+licensee, and is addressed as ``you''.  You accept the license if you
+copy, modify or distribute the work in a way requiring permission
+under copyright law.
+
+A ``Modified Version'' of the Document means any work containing the
+Document or a portion of it, either copied verbatim, or with
+modifications and/or translated into another language.
+
+A ``Secondary Section'' is a named appendix or a front-matter section
+of the Document that deals exclusively with the relationship of the
+publishers or authors of the Document to the Document's overall
+subject (or to related matters) and contains nothing that could fall
+directly within that overall subject.  (Thus, if the Document is in
+part a textbook of mathematics, a Secondary Section may not explain
+any mathematics.)  The relationship could be a matter of historical
+connection with the subject or with related matters, or of legal,
+commercial, philosophical, ethical or political position regarding
+them.
+
+The ``Invariant Sections'' are certain Secondary Sections whose titles
+are designated, as being those of Invariant Sections, in the notice
+that says that the Document is released under this License.  If a
+section does not fit the above definition of Secondary then it is not
+allowed to be designated as Invariant.  The Document may contain zero
+Invariant Sections.  If the Document does not identify any Invariant
+Sections then there are none.
+
+The ``Cover Texts'' are certain short passages of text that are listed,
+as Front-Cover Texts or Back-Cover Texts, in the notice that says that
+the Document is released under this License.  A Front-Cover Text may
+be at most 5 words, and a Back-Cover Text may be at most 25 words.
+
+A ``Transparent'' copy of the Document means a machine-readable copy,
+represented in a format whose specification is available to the
+general public, that is suitable for revising the document
+straightforwardly with generic text editors or (for images composed of
+pixels) generic paint programs or (for drawings) some widely available
+drawing editor, and that is suitable for input to text formatters or
+for automatic translation to a variety of formats suitable for input
+to text formatters.  A copy made in an otherwise Transparent file
+format whose markup, or absence of markup, has been arranged to thwart
+or discourage subsequent modification by readers is not Transparent.
+An image format is not Transparent if used for any substantial amount
+of text.  A copy that is not ``Transparent'' is called ``Opaque''.
+
+Examples of suitable formats for Transparent copies include plain
+ASCII without markup, Texinfo input format, La@TeX{} input
+format, SGML or XML using a publicly available
+DTD, and standard-conforming simple HTML,
+PostScript or PDF designed for human modification.  Examples
+of transparent image formats include PNG, XCF and
+JPG@.  Opaque formats include proprietary formats that can be
+read and edited only by proprietary word processors, SGML or
+XML for which the DTD and/or processing tools are
+not generally available, and the machine-generated HTML,
+PostScript or PDF produced by some word processors for
+output purposes only.
+
+The ``Title Page'' means, for a printed book, the title page itself,
+plus such following pages as are needed to hold, legibly, the material
+this License requires to appear in the title page.  For works in
+formats which do not have any title page as such, ``Title Page'' means
+the text near the most prominent appearance of the work's title,
+preceding the beginning of the body of the text.
+
+The ``publisher'' means any person or entity that distributes copies
+of the Document to the public.
+
+A section ``Entitled XYZ'' means a named subunit of the Document whose
+title either is precisely XYZ or contains XYZ in parentheses following
+text that translates XYZ in another language.  (Here XYZ stands for a
+specific section name mentioned below, such as ``Acknowledgements'',
+``Dedications'', ``Endorsements'', or ``History''.)  To ``Preserve the Title''
+of such a section when you modify the Document means that it remains a
+section ``Entitled XYZ'' according to this definition.
+
+The Document may include Warranty Disclaimers next to the notice which
+states that this License applies to the Document.  These Warranty
+Disclaimers are considered to be included by reference in this
+License, but only as regards disclaiming warranties: any other
+implication that these Warranty Disclaimers may have is void and has
+no effect on the meaning of this License.
+
+@item
+VERBATIM COPYING
+
+You may copy and distribute the Document in any medium, either
+commercially or noncommercially, provided that this License, the
+copyright notices, and the license notice saying this License applies
+to the Document are reproduced in all copies, and that you add no other
+conditions whatsoever to those of this License.  You may not use
+technical measures to obstruct or control the reading or further
+copying of the copies you make or distribute.  However, you may accept
+compensation in exchange for copies.  If you distribute a large enough
+number of copies you must also follow the conditions in section 3.
+
+You may also lend copies, under the same conditions stated above, and
+you may publicly display copies.
+
+@item
+COPYING IN QUANTITY
+
+If you publish printed copies (or copies in media that commonly have
+printed covers) of the Document, numbering more than 100, and the
+Document's license notice requires Cover Texts, you must enclose the
+copies in covers that carry, clearly and legibly, all these Cover
+Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
+the back cover.  Both covers must also clearly and legibly identify
+you as the publisher of these copies.  The front cover must present
+the full title with all words of the title equally prominent and
+visible.  You may add other material on the covers in addition.
+Copying with changes limited to the covers, as long as they preserve
+the title of the Document and satisfy these conditions, can be treated
+as verbatim copying in other respects.
+
+If the required texts for either cover are too voluminous to fit
+legibly, you should put the first ones listed (as many as fit
+reasonably) on the actual cover, and continue the rest onto adjacent
+pages.
+
+If you publish or distribute Opaque copies of the Document numbering
+more than 100, you must either include a machine-readable Transparent
+copy along with each Opaque copy, or state in or with each Opaque copy
+a computer-network location from which the general network-using
+public has access to download using public-standard network protocols
+a complete Transparent copy of the Document, free of added material.
+If you use the latter option, you must take reasonably prudent steps,
+when you begin distribution of Opaque copies in quantity, to ensure
+that this Transparent copy will remain thus accessible at the stated
+location until at least one year after the last time you distribute an
+Opaque copy (directly or through your agents or retailers) of that
+edition to the public.
+
+It is requested, but not required, that you contact the authors of the
+Document well before redistributing any large number of copies, to give
+them a chance to provide you with an updated version of the Document.
+
+@item
+MODIFICATIONS
+
+You may copy and distribute a Modified Version of the Document under
+the conditions of sections 2 and 3 above, provided that you release
+the Modified Version under precisely this License, with the Modified
+Version filling the role of the Document, thus licensing distribution
+and modification of the Modified Version to whoever possesses a copy
+of it.  In addition, you must do these things in the Modified Version:
+
+@enumerate A
+@item
+Use in the Title Page (and on the covers, if any) a title distinct
+from that of the Document, and from those of previous versions
+(which should, if there were any, be listed in the History section
+of the Document).  You may use the same title as a previous version
+if the original publisher of that version gives permission.
+
+@item
+List on the Title Page, as authors, one or more persons or entities
+responsible for authorship of the modifications in the Modified
+Version, together with at least five of the principal authors of the
+Document (all of its principal authors, if it has fewer than five),
+unless they release you from this requirement.
+
+@item
+State on the Title page the name of the publisher of the
+Modified Version, as the publisher.
+
+@item
+Preserve all the copyright notices of the Document.
+
+@item
+Add an appropriate copyright notice for your modifications
+adjacent to the other copyright notices.
+
+@item
+Include, immediately after the copyright notices, a license notice
+giving the public permission to use the Modified Version under the
+terms of this License, in the form shown in the Addendum below.
+
+@item
+Preserve in that license notice the full lists of Invariant Sections
+and required Cover Texts given in the Document's license notice.
+
+@item
+Include an unaltered copy of this License.
+
+@item
+Preserve the section Entitled ``History'', Preserve its Title, and add
+to it an item stating at least the title, year, new authors, and
+publisher of the Modified Version as given on the Title Page.  If
+there is no section Entitled ``History'' in the Document, create one
+stating the title, year, authors, and publisher of the Document as
+given on its Title Page, then add an item describing the Modified
+Version as stated in the previous sentence.
+
+@item
+Preserve the network location, if any, given in the Document for
+public access to a Transparent copy of the Document, and likewise
+the network locations given in the Document for previous versions
+it was based on.  These may be placed in the ``History'' section.
+You may omit a network location for a work that was published at
+least four years before the Document itself, or if the original
+publisher of the version it refers to gives permission.
+
+@item
+For any section Entitled ``Acknowledgements'' or ``Dedications'', Preserve
+the Title of the section, and preserve in the section all the
+substance and tone of each of the contributor acknowledgements and/or
+dedications given therein.
+
+@item
+Preserve all the Invariant Sections of the Document,
+unaltered in their text and in their titles.  Section numbers
+or the equivalent are not considered part of the section titles.
+
+@item
+Delete any section Entitled ``Endorsements''.  Such a section
+may not be included in the Modified Version.
+
+@item
+Do not retitle any existing section to be Entitled ``Endorsements'' or
+to conflict in title with any Invariant Section.
+
+@item
+Preserve any Warranty Disclaimers.
+@end enumerate
+
+If the Modified Version includes new front-matter sections or
+appendices that qualify as Secondary Sections and contain no material
+copied from the Document, you may at your option designate some or all
+of these sections as invariant.  To do this, add their titles to the
+list of Invariant Sections in the Modified Version's license notice.
+These titles must be distinct from any other section titles.
+
+You may add a section Entitled ``Endorsements'', provided it contains
+nothing but endorsements of your Modified Version by various
+parties---for example, statements of peer review or that the text has
+been approved by an organization as the authoritative definition of a
+standard.
+
+You may add a passage of up to five words as a Front-Cover Text, and a
+passage of up to 25 words as a Back-Cover Text, to the end of the list
+of Cover Texts in the Modified Version.  Only one passage of
+Front-Cover Text and one of Back-Cover Text may be added by (or
+through arrangements made by) any one entity.  If the Document already
+includes a cover text for the same cover, previously added by you or
+by arrangement made by the same entity you are acting on behalf of,
+you may not add another; but you may replace the old one, on explicit
+permission from the previous publisher that added the old one.
+
+The author(s) and publisher(s) of the Document do not by this License
+give permission to use their names for publicity for or to assert or
+imply endorsement of any Modified Version.
+
+@item
+COMBINING DOCUMENTS
+
+You may combine the Document with other documents released under this
+License, under the terms defined in section 4 above for modified
+versions, provided that you include in the combination all of the
+Invariant Sections of all of the original documents, unmodified, and
+list them all as Invariant Sections of your combined work in its
+license notice, and that you preserve all their Warranty Disclaimers.
+
+The combined work need only contain one copy of this License, and
+multiple identical Invariant Sections may be replaced with a single
+copy.  If there are multiple Invariant Sections with the same name but
+different contents, make the title of each such section unique by
+adding at the end of it, in parentheses, the name of the original
+author or publisher of that section if known, or else a unique number.
+Make the same adjustment to the section titles in the list of
+Invariant Sections in the license notice of the combined work.
+
+In the combination, you must combine any sections Entitled ``History''
+in the various original documents, forming one section Entitled
+``History''; likewise combine any sections Entitled ``Acknowledgements'',
+and any sections Entitled ``Dedications''.  You must delete all
+sections Entitled ``Endorsements.''
+
+@item
+COLLECTIONS OF DOCUMENTS
+
+You may make a collection consisting of the Document and other documents
+released under this License, and replace the individual copies of this
+License in the various documents with a single copy that is included in
+the collection, provided that you follow the rules of this License for
+verbatim copying of each of the documents in all other respects.
+
+You may extract a single document from such a collection, and distribute
+it individually under this License, provided you insert a copy of this
+License into the extracted document, and follow this License in all
+other respects regarding verbatim copying of that document.
+
+@item
+AGGREGATION WITH INDEPENDENT WORKS
+
+A compilation of the Document or its derivatives with other separate
+and independent documents or works, in or on a volume of a storage or
+distribution medium, is called an ``aggregate'' if the copyright
+resulting from the compilation is not used to limit the legal rights
+of the compilation's users beyond what the individual works permit.
+When the Document is included in an aggregate, this License does not
+apply to the other works in the aggregate which are not themselves
+derivative works of the Document.
+
+If the Cover Text requirement of section 3 is applicable to these
+copies of the Document, then if the Document is less than one half of
+the entire aggregate, the Document's Cover Texts may be placed on
+covers that bracket the Document within the aggregate, or the
+electronic equivalent of covers if the Document is in electronic form.
+Otherwise they must appear on printed covers that bracket the whole
+aggregate.
+
+@item
+TRANSLATION
+
+Translation is considered a kind of modification, so you may
+distribute translations of the Document under the terms of section 4.
+Replacing Invariant Sections with translations requires special
+permission from their copyright holders, but you may include
+translations of some or all Invariant Sections in addition to the
+original versions of these Invariant Sections.  You may include a
+translation of this License, and all the license notices in the
+Document, and any Warranty Disclaimers, provided that you also include
+the original English version of this License and the original versions
+of those notices and disclaimers.  In case of a disagreement between
+the translation and the original version of this License or a notice
+or disclaimer, the original version will prevail.
+
+If a section in the Document is Entitled ``Acknowledgements'',
+``Dedications'', or ``History'', the requirement (section 4) to Preserve
+its Title (section 1) will typically require changing the actual
+title.
+
+@item
+TERMINATION
+
+You may not copy, modify, sublicense, or distribute the Document
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense, or distribute it is void, and
+will automatically terminate your rights under this License.
+
+However, if you cease all violation of this License, then your license
+from a particular copyright holder is reinstated (a) provisionally,
+unless and until the copyright holder explicitly and finally
+terminates your license, and (b) permanently, if the copyright holder
+fails to notify you of the violation by some reasonable means prior to
+60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, receipt of a copy of some or all of the same material does
+not give you any rights to use it.
+
+@item
+FUTURE REVISIONS OF THIS LICENSE
+
+The Free Software Foundation may publish new, revised versions
+of the GNU Free Documentation License from time to time.  Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.  See
+@uref{https://www.gnu.org/licenses/}.
+
+Each version of the License is given a distinguishing version number.
+If the Document specifies that a particular numbered version of this
+License ``or any later version'' applies to it, you have the option of
+following the terms and conditions either of that specified version or
+of any later version that has been published (not as a draft) by the
+Free Software Foundation.  If the Document does not specify a version
+number of this License, you may choose any version ever published (not
+as a draft) by the Free Software Foundation.  If the Document
+specifies that a proxy can decide which future versions of this
+License can be used, that proxy's public statement of acceptance of a
+version permanently authorizes you to choose that version for the
+Document.
+
+@item
+RELICENSING
+
+``Massive Multiauthor Collaboration Site'' (or ``MMC Site'') means any
+World Wide Web server that publishes copyrightable works and also
+provides prominent facilities for anybody to edit those works.  A
+public wiki that anybody can edit is an example of such a server.  A
+``Massive Multiauthor Collaboration'' (or ``MMC'') contained in the
+site means any set of copyrightable works thus published on the MMC
+site.
+
+``CC-BY-SA'' means the Creative Commons Attribution-Share Alike 3.0
+license published by Creative Commons Corporation, a not-for-profit
+corporation with a principal place of business in San Francisco,
+California, as well as future copyleft versions of that license
+published by that same organization.
+
+``Incorporate'' means to publish or republish a Document, in whole or
+in part, as part of another Document.
+
+An MMC is ``eligible for relicensing'' if it is licensed under this
+License, and if all works that were first published under this License
+somewhere other than this MMC, and subsequently incorporated in whole
+or in part into the MMC, (1) had no cover texts or invariant sections,
+and (2) were thus incorporated prior to November 1, 2008.
+
+The operator of an MMC Site may republish an MMC contained in the site
+under CC-BY-SA on the same site at any time before August 1, 2009,
+provided the MMC is eligible for relicensing.
+
+@end enumerate
+
+@page
+@heading ADDENDUM: How to use this License for your documents
+
+To use this License in a document you have written, include a copy of
+the License in the document and put the following copyright and
+license notices just after the title page:
+
+@smallexample
+@group
+  Copyright (C)  @var{year}  @var{your name}.
+  Permission is granted to copy, distribute and/or modify this document
+  under the terms of the GNU Free Documentation License, Version 1.3
+  or any later version published by the Free Software Foundation;
+  with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
+  Texts.  A copy of the license is included in the section entitled ``GNU
+  Free Documentation License''.
+@end group
+@end smallexample
+
+If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
+replace the ``with@dots{}Texts.''@: line with this:
+
+@smallexample
+@group
+    with the Invariant Sections being @var{list their titles}, with
+    the Front-Cover Texts being @var{list}, and with the Back-Cover Texts
+    being @var{list}.
+@end group
+@end smallexample
+
+If you have Invariant Sections without Cover Texts, or some other
+combination of the three, merge those two alternatives to suit the
+situation.
+
+If your document contains nontrivial examples of program code, we
+recommend releasing these examples in parallel under your choice of
+free software license, such as the GNU General Public License,
+to permit their use in free software.
+
+@c Local Variables:
+@c ispell-local-pdict: "ispell-dict"
+@c End:
diff --git a/src/grep/doc/grep.in.1 b/src/grep/doc/grep.in.1
new file mode 100644
index 0000000..e8854f2
--- /dev/null
+++ b/src/grep/doc/grep.in.1
@@ -0,0 +1,1402 @@
+.\" GNU grep man page
+.de dT
+.ds Dt \\$2
+..
+.dT Time-stamp: "2019-12-29"
+.\" Update the above date whenever a change to either this file or
+.\" grep.c's 'usage' function results in a nontrivial change to the man page.
+.\" In Emacs, you can update the date by running 'M-x time-stamp'
+.\" after you make a change that you decide is nontrivial.
+.\" It is no big deal to forget to update the date.
+.
+.TH GREP 1 \*(Dt "GNU grep @VERSION@" "User Commands"
+.
+.if !\w|\*(lq| \{\
+.\" groff an-old.tmac does not seem to be in use, so define lq and rq.
+.	ie \n(.g \{\
+.		ds lq \(lq\"
+.		ds rq \(rq\"
+.	\}
+.	el \{\
+.		ds lq ``
+.		ds rq ''
+.	\}
+.\}
+.
+.if !\w|\*(la| \{\
+.\" groff an-ext.tmac does not seem to be in use, so define the parts of
+.\" it that are used below.  For a copy of groff an-ext.tmac, please see:
+.\" https://git.savannah.gnu.org/cgit/groff.git/plain/tmac/an-ext.tmac
+.\" --- Start of lines taken from groff an-ext.tmac
+.
+.\" Check whether we are using grohtml.
+.nr mH 0
+.if \n(.g \
+.  if '\*(.T'html' \
+.    nr mH 1
+.
+.
+.\" Map mono-width fonts to standard fonts for groff's TTY device.
+.if n \{\
+.  do ftr CR R
+.  do ftr CI I
+.  do ftr CB B
+.\}
+.
+.\" groff has glyph entities for angle brackets.
+.ie \n(.g \{\
+.  ds la \(la\"
+.  ds ra \(ra\"
+.\}
+.el \{\
+.  ds la <\"
+.  ds ra >\"
+.  \" groff's man macros control hyphenation with this register.
+.  nr HY 1
+.\}
+.
+.\" Start URL.
+.de UR
+.  ds m1 \\$1\"
+.  nh
+.  if \\n(mH \{\
+.    \" Start diversion in a new environment.
+.    do ev URL-div
+.    do di URL-div
+.  \}
+..
+.
+.
+.\" End URL.
+.de UE
+.  ie \\n(mH \{\
+.    br
+.    di
+.    ev
+.
+.    \" Has there been one or more input lines for the link text?
+.    ie \\n(dn \{\
+.      do HTML-NS "<a href=""\\*(m1"">"
+.      \" Yes, strip off final newline of diversion and emit it.
+.      do chop URL-div
+.      do URL-div
+\c
+.      do HTML-NS </a>
+.    \}
+.    el \
+.      do HTML-NS "<a href=""\\*(m1"">\\*(m1</a>"
+\&\\$*\"
+.  \}
+.  el \
+\\*(la\\*(m1\\*(ra\\$*\"
+.
+.  hy \\n(HY
+..
+.
+.
+.\" Start email address.
+.de MT
+.  ds m1 \\$1\"
+.  nh
+.  if \\n(mH \{\
+.    \" Start diversion in a new environment.
+.    do ev URL-div
+.    do di URL-div
+.  \}
+..
+.
+.
+.\" End email address.
+.de ME
+.  ie \\n(mH \{\
+.    br
+.    di
+.    ev
+.
+.    \" Has there been one or more input lines for the link text?
+.    ie \\n(dn \{\
+.      do HTML-NS "<a href=""mailto:\\*(m1"">"
+.      \" Yes, strip off final newline of diversion and emit it.
+.      do chop URL-div
+.      do URL-div
+\c
+.      do HTML-NS </a>
+.    \}
+.    el \
+.      do HTML-NS "<a href=""mailto:\\*(m1"">\\*(m1</a>"
+\&\\$*\"
+.  \}
+.  el \
+\\*(la\\*(m1\\*(ra\\$*\"
+.
+.  hy \\n(HY
+..
+.\" --- End of lines taken from groff an-ext.tmac
+.\}
+.
+.hy 0
+.
+.SH NAME
+grep, egrep, fgrep \- print lines that match patterns
+.
+.SH SYNOPSIS
+.B grep
+.RI [ OPTION .\|.\|.]\&
+.I PATTERNS
+.RI [ FILE .\|.\|.]
+.br
+.B grep
+.RI [ OPTION .\|.\|.]\&
+.B \-e
+.I PATTERNS
+\&.\|.\|.\&
+.RI [ FILE .\|.\|.]
+.br
+.B grep
+.RI [ OPTION .\|.\|.]\&
+.B \-f
+.I PATTERN_FILE
+\&.\|.\|.\&
+.RI [ FILE .\|.\|.]
+.
+.SH DESCRIPTION
+.B grep
+searches for
+.I PATTERNS
+in each
+.IR FILE .
+.I PATTERNS
+is one or more patterns separated by newline characters, and
+.B grep
+prints each line that matches a pattern.
+Typically
+.I PATTERNS
+should be quoted when
+.B grep
+is used in a shell command.
+.PP
+A
+.I FILE
+of
+.RB "\*(lq" \- "\*(rq"
+stands for standard input.
+If no
+.I FILE
+is given, recursive searches examine the working directory,
+and nonrecursive searches read standard input.
+.PP
+In addition, the variant programs
+.B egrep
+and
+.B fgrep
+are the same as
+.B "grep\ \-E"
+and
+.BR "grep\ \-F" ,
+respectively.
+These variants are deprecated, but are provided for backward compatibility.
+.
+.SH OPTIONS
+.SS "Generic Program Information"
+.TP
+.B \-\^\-help
+Output a usage message and exit.
+.TP
+.BR \-V ", " \-\^\-version
+Output the version number of
+.B grep
+and exit.
+.SS "Pattern Syntax"
+.TP
+.BR \-E ", " \-\^\-extended\-regexp
+Interpret
+.I PATTERNS
+as extended regular expressions (EREs, see below).
+.TP
+.BR \-F ", " \-\^\-fixed\-strings
+Interpret
+.I PATTERNS
+as fixed strings, not regular expressions.
+.TP
+.BR \-G ", " \-\^\-basic\-regexp
+Interpret
+.I PATTERNS
+as basic regular expressions (BREs, see below).
+This is the default.
+.TP
+.BR \-P ", " \-\^\-perl\-regexp
+Interpret I<PATTERNS> as Perl-compatible regular expressions (PCREs).
+This option is experimental when combined with the
+.B \-z
+.RB ( \-\^\-null\-data )
+option, and
+.B "grep \-P"
+may warn of unimplemented features.
+.SS "Matching Control"
+.TP
+.BI \-e " PATTERNS" "\fR,\fP \-\^\-regexp=" PATTERNS
+Use
+.I PATTERNS
+as the patterns.
+If this option is used multiple times or is combined with the
+.B \-f
+.RB ( \-\^\-file )
+option, search for all patterns given.
+This option can be used to protect a pattern beginning with \*(lq\-\*(rq.
+.TP
+.BI \-f " FILE" "\fR,\fP \-\^\-file=" FILE
+Obtain patterns from
+.IR FILE ,
+one per line.
+If this option is used multiple times or is combined with the
+.B \-e
+.RB ( \-\^\-regexp )
+option, search for all patterns given.
+The empty file contains zero patterns, and therefore matches nothing.
+.TP
+.BR \-i ", " \-\^\-ignore\-case
+Ignore case distinctions in patterns and input data,
+so that characters that differ only in case
+match each other.
+.TP
+.B \-\^\-no\-ignore\-case
+Do not ignore case distinctions in patterns and input data.
+This is the default.
+This option is useful for passing to shell scripts that already use
+.BR \-i ,
+to cancel its effects because the two options override each other.
+.TP
+.BR \-v ", " \-\^\-invert\-match
+Invert the sense of matching, to select non-matching lines.
+.TP
+.BR \-w ", " \-\^\-word\-regexp
+Select only those lines containing matches that form whole words.
+The test is that the matching substring must either be at the
+beginning of the line, or preceded by a non-word constituent
+character.
+Similarly, it must be either at the end of the line
+or followed by a non-word constituent character.
+Word-constituent characters are letters, digits, and the underscore.
+This option has no effect if
+.B \-x
+is also specified.
+.TP
+.BR \-x ", " \-\^\-line\-regexp
+Select only those matches that exactly match the whole line.
+For a regular expression pattern, this is like parenthesizing the
+pattern and then surrounding it with
+.B ^
+and
+.BR $ .
+.TP
+.B \-y
+Obsolete synonym for
+.BR \-i .
+.SS "General Output Control"
+.TP
+.BR \-c ", " \-\^\-count
+Suppress normal output; instead print a count of
+matching lines for each input file.
+With the
+.BR \-v ", " \-\^\-invert\-match
+option (see below), count non-matching lines.
+.TP
+.BR \-\^\-color [ =\fIWHEN\fP "], " \-\^\-colour [ =\fIWHEN\fP ]
+Surround the matched (non-empty) strings, matching lines, context lines,
+file names, line numbers, byte offsets, and separators (for fields and
+groups of context lines) with escape sequences to display them in color
+on the terminal.
+The colors are defined by the environment variable
+.BR GREP_COLORS .
+The deprecated environment variable
+.B GREP_COLOR
+is still supported, but its setting does not have priority.
+.I WHEN
+is
+.BR never ", " always ", or " auto .
+.TP
+.BR \-L ", " \-\^\-files\-without\-match
+Suppress normal output; instead print the name
+of each input file from which no output would
+normally have been printed.
+.TP
+.BR \-l ", " \-\^\-files\-with\-matches
+Suppress normal output; instead print
+the name of each input file from which output
+would normally have been printed.
+Scanning each input file stops upon first match.
+.TP
+.BI \-m " NUM" "\fR,\fP \-\^\-max\-count=" NUM
+Stop reading a file after
+.I NUM
+matching lines.
+If the input is standard input from a regular file,
+and
+.I NUM
+matching lines are output,
+.B grep
+ensures that the standard input is positioned to just after the last
+matching line before exiting, regardless of the presence of trailing
+context lines.
+This enables a calling process to resume a search.
+When
+.B grep
+stops after
+.I NUM
+matching lines, it outputs any trailing context lines.
+When the
+.B \-c
+or
+.B \-\^\-count
+option is also used,
+.B grep
+does not output a count greater than
+.IR NUM .
+When the
+.B \-v
+or
+.B \-\^\-invert\-match
+option is also used,
+.B grep
+stops after outputting
+.I NUM
+non-matching lines.
+.TP
+.BR \-o ", " \-\^\-only\-matching
+Print only the matched (non-empty) parts of a matching line,
+with each such part on a separate output line.
+.TP
+.BR \-q ", " \-\^\-quiet ", " \-\^\-silent
+Quiet; do not write anything to standard output.
+Exit immediately with zero status if any match is found,
+even if an error was detected.
+Also see the
+.B \-s
+or
+.B \-\^\-no\-messages
+option.
+.TP
+.BR \-s ", " \-\^\-no\-messages
+Suppress error messages about nonexistent or unreadable files.
+.SS "Output Line Prefix Control"
+.TP
+.BR \-b ", " \-\^\-byte\-offset
+Print the 0-based byte offset within the input file
+before each line of output.
+If
+.B \-o
+.RB ( \-\^\-only\-matching )
+is specified,
+print the offset of the matching part itself.
+.TP
+.BR \-H ", " \-\^\-with\-filename
+Print the file name for each match.
+This is the default when there is more than one file to search.
+This is a GNU extension.
+.TP
+.BR \-h ", " \-\^\-no\-filename
+Suppress the prefixing of file names on output.
+This is the default when there is only one file
+(or only standard input) to search.
+.TP
+.BI \-\^\-label= LABEL
+Display input actually coming from standard input as input coming from file
+.IR LABEL .
+This can be useful for commands that transform a file's contents
+before searching,
+e.g.,
+.BR "gzip \-cd foo.gz | grep \-\^\-label=foo \-H 'some pattern'" .
+See also the
+.B \-H
+option.
+.TP
+.BR \-n ", " \-\^\-line\-number
+Prefix each line of output with the 1-based line number
+within its input file.
+.TP
+.BR \-T ", " \-\^\-initial\-tab
+Make sure that the first character of actual line content lies on a
+tab stop, so that the alignment of tabs looks normal.
+This is useful with options that prefix their output to the actual content:
+.BR \-H , \-n ,
+and
+.BR \-b .
+In order to improve the probability that lines
+from a single file will all start at the same column,
+this also causes the line number and byte offset (if present)
+to be printed in a minimum size field width.
+.TP
+.BR \-Z ", " \-\^\-null
+Output a zero byte (the ASCII
+.B NUL
+character) instead of the character that normally follows a file name.
+For example,
+.B "grep \-lZ"
+outputs a zero byte after each file name instead of the usual newline.
+This option makes the output unambiguous, even in the presence of file
+names containing unusual characters like newlines.
+This option can be used with commands like
+.BR "find \-print0" ,
+.BR "perl \-0" ,
+.BR "sort \-z" ,
+and
+.B "xargs \-0"
+to process arbitrary file names,
+even those that contain newline characters.
+.SS "Context Line Control"
+.TP
+.BI \-A " NUM" "\fR,\fP \-\^\-after\-context=" NUM
+Print
+.I NUM
+lines of trailing context after matching lines.
+Places a line containing a group separator
+.RB ( \-\^\- )
+between contiguous groups of matches.
+With the
+.B \-o
+or
+.B \-\^\-only\-matching
+option, this has no effect and a warning is given.
+.TP
+.BI \-B " NUM" "\fR,\fP \-\^\-before\-context=" NUM
+Print
+.I NUM
+lines of leading context before matching lines.
+Places a line containing a group separator
+.RB ( \-\^\- )
+between contiguous groups of matches.
+With the
+.B \-o
+or
+.B \-\^\-only\-matching
+option, this has no effect and a warning is given.
+.TP
+.BI \-C " NUM" "\fR,\fP \-" NUM "\fR,\fP \-\^\-context=" NUM
+Print
+.I NUM
+lines of output context.
+Places a line containing a group separator
+.RB ( \-\^\- )
+between contiguous groups of matches.
+With the
+.B \-o
+or
+.B \-\^\-only\-matching
+option, this has no effect and a warning is given.
+.TP
+.BI \-\^\-group\-separator= SEP
+When
+.BR \-A ,
+.BR \-B ,
+or
+.B \-C
+are in use, print
+.I SEP
+instead of
+.B \-\^\-
+between groups of lines.
+.TP
+.B \-\^\-no\-group\-separator
+When
+.BR \-A ,
+.BR \-B ,
+or
+.B \-C
+are in use, do not print a separator between groups of lines.
+.SS "File and Directory Selection"
+.TP
+.BR \-a ", " \-\^\-text
+Process a binary file as if it were text; this is equivalent to the
+.B \-\^\-binary\-files=text
+option.
+.TP
+.BI \-\^\-binary\-files= TYPE
+If a file's data or metadata
+indicate that the file contains binary data,
+assume that the file is of type
+.IR TYPE .
+Non-text bytes indicate binary data; these are either output bytes that are
+improperly encoded for the current locale, or null input bytes when the
+.B \-z
+option is not given.
+.IP
+By default,
+.I TYPE
+is
+.BR binary ,
+and
+.B grep
+suppresses output after null input binary data is discovered,
+and suppresses output lines that contain improperly encoded data.
+When some output is suppressed,
+.B grep
+follows any output
+with a one-line message saying that a binary file matches.
+.IP
+If
+.I TYPE
+is
+.BR without\-match ,
+when
+.B grep
+discovers null input binary data it assumes that the rest of the file
+does not match; this is equivalent to the
+.B \-I
+option.
+.IP
+If
+.I TYPE
+is
+.BR text ,
+.B grep
+processes a binary file as if it were text; this is equivalent to the
+.B \-a
+option.
+.IP
+When
+.I type
+is
+.BR binary ,
+.B grep
+may treat non-text bytes as line terminators even without the
+.B \-z
+option.  This means choosing
+.B binary
+versus
+.B text
+can affect whether a pattern matches a file.  For
+example, when
+.I type
+is
+.B binary
+the pattern
+.B q$ might
+match
+.B q
+immediately followed by a null byte, even though this
+is not matched when
+.I type
+is
+.BR text .
+Conversely, when
+.I type
+is
+.B binary
+the pattern
+.B .\&
+(period) might not match a null byte.
+.IP
+.I Warning:
+The
+.B \-a
+option might output binary garbage,
+which can have nasty side effects if the output is a terminal and if the
+terminal driver interprets some of it as commands.
+On the other hand, when reading files whose text encodings are
+unknown, it can be helpful to use
+.B \-a
+or to set
+.B LC_ALL='C'
+in the environment, in order to find more matches even if the matches
+are unsafe for direct display.
+.TP
+.BI \-D " ACTION" "\fR,\fP \-\^\-devices=" ACTION
+If an input file is a device, FIFO or socket, use
+.I ACTION
+to process it.
+By default,
+.I ACTION
+is
+.BR read ,
+which means that devices are read just as if they were ordinary files.
+If
+.I ACTION
+is
+.BR skip ,
+devices are silently skipped.
+.TP
+.BI \-d " ACTION" "\fR,\fP \-\^\-directories=" ACTION
+If an input file is a directory, use
+.I ACTION
+to process it.
+By default,
+.I ACTION
+is
+.BR read ,
+i.e., read directories just as if they were ordinary files.
+If
+.I ACTION
+is
+.BR skip ,
+silently skip directories.
+If
+.I ACTION
+is
+.BR recurse ,
+read all files under each directory, recursively,
+following symbolic links only if they are on the command line.
+This is equivalent to the
+.B \-r
+option.
+.TP
+.BI \-\^\-exclude= GLOB
+Skip any command-line file with a name suffix that matches the pattern
+.IR GLOB ,
+using wildcard matching; a name suffix is either the whole
+name, or a trailing part that starts with a non-slash character
+immediately after a slash
+.RB ( / )
+in the name.
+When searching recursively, skip any subfile whose base name matches
+.IR GLOB ;
+the base name is the part after the last slash.
+A pattern can use
+.BR * ,
+.BR ? ,
+and
+.BR [ .\|.\|. ]\&
+as wildcards, and
+.B \e
+to quote a wildcard or backslash character literally.
+.TP
+.BI \-\^\-exclude\-from= FILE
+Skip files whose base name matches any of the file-name globs read from
+.I FILE
+(using wildcard matching as described under
+.BR \-\^\-exclude ).
+.TP
+.BI \-\^\-exclude\-dir= GLOB
+Skip any command-line directory with a name suffix that matches the
+pattern
+.IR GLOB .
+When searching recursively, skip any subdirectory
+whose base name matches
+.IR GLOB .
+Ignore any redundant trailing slashes in
+.IR GLOB .
+.TP
+.BR \-I
+Process a binary file as if it did not contain matching data; this is
+equivalent to the
+.B \-\^\-binary\-files=without\-match
+option.
+.TP
+.BI \-\^\-include= GLOB
+Search only files whose base name matches
+.I GLOB
+(using wildcard matching as described under
+.BR \-\^\-exclude ).
+If contradictory
+.B \-\^\-include
+and
+.B \-\^\-exclude
+options are given, the last matching one wins.
+If no
+.B \-\^\-include
+or
+.B \-\^\-exclude
+options match, a file is included unless the first such option is
+.BR \-\^\-include .
+.TP
+.BR \-r ", " \-\^\-recursive
+Read all files under each directory, recursively,
+following symbolic links only if they are on the command line.
+Note that if no file operand is given, B<grep> searches the working directory.
+This is equivalent to the
+.B "\-d recurse"
+option.
+.TP
+.BR \-R ", " \-\^\-dereference\-recursive
+Read all files under each directory, recursively.
+Follow all symbolic links, unlike
+.BR \-r .
+.SS "Other Options"
+.TP
+.B \-\^\-line\-buffered
+Use line buffering on output.
+This can cause a performance penalty.
+.TP
+.BR \-U ", " \-\^\-binary
+Treat the file(s) as binary.
+By default, under MS-DOS and MS-Windows,
+.BR grep
+guesses whether a file is text or binary as described for the
+.B \-\^\-binary\-files
+option.
+If
+.BR grep
+decides the file is a text file, it strips the CR characters from the
+original file contents (to make regular expressions with
+.B ^
+and
+.B $
+work correctly).
+Specifying
+.B \-U
+overrules this guesswork, causing all files to be read and passed to the
+matching mechanism verbatim; if the file is a text file with CR/LF
+pairs at the end of each line, this will cause some regular
+expressions to fail.
+This option has no effect on platforms
+other than MS-DOS and MS-Windows.
+.TP
+.BR \-z ", " \-\^\-null\-data
+Treat input and output data as sequences of lines, each terminated by
+a zero byte (the ASCII NUL character) instead of a newline.
+Like the
+.B \-Z
+or
+.B \-\^\-null
+option, this option can be used with commands like
+.B sort -z
+to process arbitrary file names.
+.
+.SH "REGULAR EXPRESSIONS"
+A regular expression is a pattern that describes a set of strings.
+Regular expressions are constructed analogously to arithmetic
+expressions, by using various operators to combine smaller expressions.
+.PP
+.B grep
+understands three different versions of regular expression syntax:
+\*(lqbasic\*(rq (BRE), \*(lqextended\*(rq (ERE) and \*(lqperl\*(rq (PCRE).
+In GNU
+.B grep
+there is no difference in available functionality between basic and
+extended syntaxes.
+In other implementations, basic regular expressions are less powerful.
+The following description applies to extended regular expressions;
+differences for basic regular expressions are summarized afterwards.
+Perl-compatible regular expressions give additional functionality, and are
+documented in B<pcresyntax>(3) and B<pcrepattern>(3), but work only if
+PCRE support is enabled.
+.PP
+The fundamental building blocks are the regular expressions
+that match a single character.
+Most characters, including all letters and digits,
+are regular expressions that match themselves.
+Any meta-character with special meaning
+may be quoted by preceding it with a backslash.
+.PP
+The period
+.B .\&
+matches any single character.
+It is unspecified whether it matches an encoding error.
+.SS "Character Classes and Bracket Expressions"
+A
+.I "bracket expression"
+is a list of characters enclosed by
+.B [
+and
+.BR ] .
+It matches any single
+character in that list.
+If the first character of the list
+is the caret
+.B ^
+then it matches any character
+.I not
+in the list; it is unspecified whether it matches an encoding error.
+For example, the regular expression
+.B [0123456789]
+matches any single digit.
+.PP
+Within a bracket expression, a
+.I "range expression"
+consists of two characters separated by a hyphen.
+It matches any single character that sorts between the two characters,
+inclusive, using the locale's collating sequence and character set.
+For example, in the default C locale,
+.B [a\-d]
+is equivalent to
+.BR [abcd] .
+Many locales sort characters in dictionary order, and in these locales
+.B [a\-d]
+is typically not equivalent to
+.BR [abcd] ;
+it might be equivalent to
+.BR [aBbCcDd] ,
+for example.
+To obtain the traditional interpretation of bracket expressions,
+you can use the C locale by setting the
+.B LC_ALL
+environment variable to the value
+.BR C .
+.PP
+Finally, certain named classes of characters are predefined within
+bracket expressions, as follows.
+Their names are self explanatory, and they are
+.BR [:alnum:] ,
+.BR [:alpha:] ,
+.BR [:blank:] ,
+.BR [:cntrl:] ,
+.BR [:digit:] ,
+.BR [:graph:] ,
+.BR [:lower:] ,
+.BR [:print:] ,
+.BR [:punct:] ,
+.BR [:space:] ,
+.BR [:upper:] ,
+and
+.BR [:xdigit:] .
+For example,
+.B [[:alnum:]]
+means the character class of numbers and
+letters in the current locale.
+In the C locale and ASCII
+character set encoding, this is the same as
+.BR [0\-9A\-Za\-z] .
+(Note that the brackets in these class names are part of the symbolic
+names, and must be included in addition to the brackets delimiting
+the bracket expression.)
+Most meta-characters lose their special meaning inside bracket expressions.
+To include a literal
+.B ]
+place it first in the list.
+Similarly, to include a literal
+.B ^
+place it anywhere but first.
+Finally, to include a literal
+.B \-
+place it last.
+.SS Anchoring
+The caret
+.B ^
+and the dollar sign
+.B $
+are meta-characters that respectively match the empty string at the
+beginning and end of a line.
+.SS "The Backslash Character and Special Expressions"
+The symbols
+.B \e<
+and
+.B \e>
+respectively match the empty string at the beginning and end of a word.
+The symbol
+.B \eb
+matches the empty string at the edge of a word,
+and
+.B \eB
+matches the empty string provided it's
+.I not
+at the edge of a word.
+The symbol
+.B \ew
+is a synonym for
+.B [_[:alnum:]]
+and
+.B \eW
+is a synonym for
+.BR [^_[:alnum:]] .
+.SS Repetition
+A regular expression may be followed by one of several repetition operators:
+.PD 0
+.TP
+.B ?
+The preceding item is optional and matched at most once.
+.TP
+.B *
+The preceding item will be matched zero or more times.
+.TP
+.B +
+The preceding item will be matched one or more times.
+.TP
+.BI { n }
+The preceding item is matched exactly
+.I n
+times.
+.TP
+.BI { n ,}
+The preceding item is matched
+.I n
+or more times.
+.TP
+.BI {, m }
+The preceding item is matched at most
+.I m
+times.
+This is a GNU extension.
+.TP
+.BI { n , m }
+The preceding item is matched at least
+.I n
+times, but not more than
+.I m
+times.
+.PD
+.SS Concatenation
+Two regular expressions may be concatenated; the resulting
+regular expression matches any string formed by concatenating
+two substrings that respectively match the concatenated
+expressions.
+.SS Alternation
+Two regular expressions may be joined by the infix operator
+.BR | ;
+the resulting regular expression matches any string matching
+either alternate expression.
+.SS Precedence
+Repetition takes precedence over concatenation, which in turn
+takes precedence over alternation.
+A whole expression may be enclosed in parentheses
+to override these precedence rules and form a subexpression.
+.SS "Back-references and Subexpressions"
+The back-reference
+.BI \e n\c
+\&, where
+.I n
+is a single digit, matches the substring
+previously matched by the
+.IR n th
+parenthesized subexpression of the regular expression.
+.SS "Basic vs Extended Regular Expressions"
+In basic regular expressions the meta-characters
+.BR ? ,
+.BR + ,
+.BR { ,
+.BR | ,
+.BR ( ,
+and
+.BR )
+lose their special meaning; instead use the backslashed
+versions
+.BR \e? ,
+.BR \e+ ,
+.BR \e{ ,
+.BR \e| ,
+.BR \e( ,
+and
+.BR \e) .
+.
+.SH "EXIT STATUS"
+Normally the exit status is 0 if a line is selected, 1 if no lines
+were selected, and 2 if an error occurred.  However, if the
+.B \-q
+or
+.B \-\^\-quiet
+or
+.B \-\^\-silent
+is used and a line is selected, the exit status is 0 even if an error
+occurred.
+.
+.SH ENVIRONMENT
+The behavior of
+.B grep
+is affected by the following environment variables.
+.PP
+The locale for category
+.BI LC_ foo
+is specified by examining the three environment variables
+.BR LC_ALL ,
+.BR LC_\fIfoo\fP ,
+.BR LANG ,
+in that order.
+The first of these variables that is set specifies the locale.
+For example, if
+.B LC_ALL
+is not set, but
+.B LC_MESSAGES
+is set to
+.BR pt_BR ,
+then the Brazilian Portuguese locale is used for the
+.B LC_MESSAGES
+category.
+The C locale is used if none of these environment variables are set,
+if the locale catalog is not installed, or if
+.B grep
+was not compiled with national language support (NLS).
+The shell command
+.B "locale \-a"
+lists locales that are currently available.
+.TP
+.B GREP_COLOR
+This variable specifies the color used to highlight matched (non-empty) text.
+It is deprecated in favor of
+.BR GREP_COLORS ,
+but still supported.
+The
+.BR mt ,
+.BR ms ,
+and
+.B mc
+capabilities of
+.B GREP_COLORS
+have priority over it.
+It can only specify the color used to highlight
+the matching non-empty text in any matching line
+(a selected line when the
+.B \-v
+command-line option is omitted,
+or a context line when
+.B \-v
+is specified).
+The default is
+.BR 01;31 ,
+which means a bold red foreground text on the terminal's default background.
+.TP
+.B GREP_COLORS
+Specifies the colors and other attributes
+used to highlight various parts of the output.
+Its value is a colon-separated list of capabilities
+that defaults to
+.B ms=01;31:mc=01;31:sl=:cx=:fn=35:ln=32:bn=32:se=36
+with the
+.B rv
+and
+.B ne
+boolean capabilities omitted (i.e., false).
+Supported capabilities are as follows.
+.RS
+.TP
+.B sl=
+SGR substring for whole selected lines
+(i.e.,
+matching lines when the
+.B \-v
+command-line option is omitted,
+or non-matching lines when
+.B \-v
+is specified).
+If however the boolean
+.B rv
+capability
+and the
+.B \-v
+command-line option are both specified,
+it applies to context matching lines instead.
+The default is empty (i.e., the terminal's default color pair).
+.TP
+.B cx=
+SGR substring for whole context lines
+(i.e.,
+non-matching lines when the
+.B \-v
+command-line option is omitted,
+or matching lines when
+.B \-v
+is specified).
+If however the boolean
+.B rv
+capability
+and the
+.B \-v
+command-line option are both specified,
+it applies to selected non-matching lines instead.
+The default is empty (i.e., the terminal's default color pair).
+.TP
+.B rv
+Boolean value that reverses (swaps) the meanings of
+the
+.B sl=
+and
+.B cx=
+capabilities
+when the
+.B \-v
+command-line option is specified.
+The default is false (i.e., the capability is omitted).
+.TP
+.B mt=01;31
+SGR substring for matching non-empty text in any matching line
+(i.e.,
+a selected line when the
+.B \-v
+command-line option is omitted,
+or a context line when
+.B \-v
+is specified).
+Setting this is equivalent to setting both
+.B ms=
+and
+.B mc=
+at once to the same value.
+The default is a bold red text foreground over the current line background.
+.TP
+.B ms=01;31
+SGR substring for matching non-empty text in a selected line.
+(This is only used when the
+.B \-v
+command-line option is omitted.)
+The effect of the
+.B sl=
+(or
+.B cx=
+if
+.BR rv )
+capability remains active when this kicks in.
+The default is a bold red text foreground over the current line background.
+.TP
+.B mc=01;31
+SGR substring for matching non-empty text in a context line.
+(This is only used when the
+.B \-v
+command-line option is specified.)
+The effect of the
+.B cx=
+(or
+.B sl=
+if
+.BR rv )
+capability remains active when this kicks in.
+The default is a bold red text foreground over the current line background.
+.TP
+.B fn=35
+SGR substring for file names prefixing any content line.
+The default is a magenta text foreground over the terminal's default background.
+.TP
+.B ln=32
+SGR substring for line numbers prefixing any content line.
+The default is a green text foreground over the terminal's default background.
+.TP
+.B bn=32
+SGR substring for byte offsets prefixing any content line.
+The default is a green text foreground over the terminal's default background.
+.TP
+.B se=36
+SGR substring for separators that are inserted
+between selected line fields
+.RB ( : ),
+between context line fields,
+.RB ( \- ),
+and between groups of adjacent lines when nonzero context is specified
+.RB ( \-\^\- ).
+The default is a cyan text foreground over the terminal's default background.
+.TP
+.B ne
+Boolean value that prevents clearing to the end of line
+using Erase in Line (EL) to Right
+.RB ( \e33[K )
+each time a colorized item ends.
+This is needed on terminals on which EL is not supported.
+It is otherwise useful on terminals
+for which the
+.B back_color_erase
+.RB ( bce )
+boolean terminfo capability does not apply,
+when the chosen highlight colors do not affect the background,
+or when EL is too slow or causes too much flicker.
+The default is false (i.e., the capability is omitted).
+.PP
+Note that boolean capabilities have no
+.BR = .\|.\|.\&
+part.
+They are omitted (i.e., false) by default and become true when specified.
+.PP
+See the Select Graphic Rendition (SGR) section
+in the documentation of the text terminal that is used
+for permitted values and their meaning as character attributes.
+These substring values are integers in decimal representation
+and can be concatenated with semicolons.
+.B grep
+takes care of assembling the result
+into a complete SGR sequence
+.RB ( \e33[ .\|.\|. m ).
+Common values to concatenate include
+.B 1
+for bold,
+.B 4
+for underline,
+.B 5
+for blink,
+.B 7
+for inverse,
+.B 39
+for default foreground color,
+.B 30
+to
+.B 37
+for foreground colors,
+.B 90
+to
+.B 97
+for 16-color mode foreground colors,
+.B 38;5;0
+to
+.B 38;5;255
+for 88-color and 256-color modes foreground colors,
+.B 49
+for default background color,
+.B 40
+to
+.B 47
+for background colors,
+.B 100
+to
+.B 107
+for 16-color mode background colors, and
+.B 48;5;0
+to
+.B 48;5;255
+for 88-color and 256-color modes background colors.
+.RE
+.TP
+\fBLC_ALL\fP, \fBLC_COLLATE\fP, \fBLANG\fP
+These variables specify the locale for the
+.B LC_COLLATE
+category,
+which determines the collating sequence
+used to interpret range expressions like
+.BR [a\-z] .
+.TP
+\fBLC_ALL\fP, \fBLC_CTYPE\fP, \fBLANG\fP
+These variables specify the locale for the
+.B LC_CTYPE
+category,
+which determines the type of characters,
+e.g., which characters are whitespace.
+This category also determines the character encoding, that is, whether
+text is encoded in UTF-8, ASCII, or some other encoding.  In the C or
+POSIX locale, all characters are encoded as a single byte and every
+byte is a valid character.
+.TP
+\fBLC_ALL\fP, \fBLC_MESSAGES\fP, \fBLANG\fP
+These variables specify the locale for the
+.B LC_MESSAGES
+category,
+which determines the language that
+.B grep
+uses for messages.
+The default C locale uses American English messages.
+.TP
+.B POSIXLY_CORRECT
+If set,
+.B grep
+behaves as POSIX requires; otherwise,
+.B grep
+behaves more like other GNU programs.
+POSIX requires that options that follow file names must be
+treated as file names; by default, such options are permuted to the
+front of the operand list and are treated as options.
+Also, POSIX requires that unrecognized options be diagnosed as
+\*(lqillegal\*(rq, but since they are not really against the law the default
+is to diagnose them as \*(lqinvalid\*(rq.
+.B POSIXLY_CORRECT
+also disables \fB_\fP\fIN\fP\fB_GNU_nonoption_argv_flags_\fP,
+described below.
+.TP
+\fB_\fP\fIN\fP\fB_GNU_nonoption_argv_flags_\fP
+(Here
+.I N
+is
+.BR grep 's
+numeric process ID.)  If the
+.IR i th
+character of this environment variable's value is
+.BR 1 ,
+do not consider the
+.IR i th
+operand of
+.B grep
+to be an option, even if it appears to be one.
+A shell can put this variable in the environment for each command it runs,
+specifying which operands are the results of file name wildcard
+expansion and therefore should not be treated as options.
+This behavior is available only with the GNU C library, and only
+when
+.B POSIXLY_CORRECT
+is not set.
+.
+.SH NOTES
+This man page is maintained only fitfully;
+the full documentation is often more up-to-date.
+.
+.SH COPYRIGHT
+Copyright 1998-2000, 2002, 2005-2021 Free Software Foundation, Inc.
+.PP
+This is free software;
+see the source for copying conditions.
+There is NO warranty;
+not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+.
+.SH BUGS
+.SS "Reporting Bugs"
+Email bug reports to
+.MT bug-grep@gnu.org
+the bug-reporting address
+.ME .
+An
+.UR https://lists.gnu.org/mailman/listinfo/bug-grep
+email archive
+.UE
+and a
+.UR https://debbugs.gnu.org/cgi/pkgreport.cgi?package=grep
+bug tracker
+.UE
+are available.
+.SS "Known Bugs"
+Large repetition counts in the
+.BI { n , m }
+construct may cause
+.B grep
+to use lots of memory.
+In addition,
+certain other obscure regular expressions require exponential time
+and space, and may cause
+.B grep
+to run out of memory.
+.PP
+Back-references are very slow, and may require exponential time.
+.
+.SH EXAMPLE
+The following example outputs the location and contents of any line
+containing \*(lqf\*(rq and ending in \*(lq.c\*(rq,
+within all files in the current directory whose names
+contain \*(lqg\*(rq and end in \*(lq.h\*(rq.
+The
+.B \-n
+option outputs line numbers, the
+.B \-\-
+argument treats expansions of \*(lq*g*.h\*(rq starting with \*(lq\-\*(rq
+as file names not options,
+and the empty file /dev/null causes file names to be output
+even if only one file name happens to be of the form \*(lq*g*.h\*(rq.
+.PP
+.in +2n
+.EX
+$ \fBgrep\fP \-n \-\- 'f.*\e.c$' *g*.h /dev/null
+argmatch.h:1:/* definitions and prototypes for argmatch.c
+.EE
+.in
+.PP
+The only line that matches is line 1 of argmatch.h.
+Note that the regular expression syntax used in the pattern differs
+from the globbing syntax that the shell uses to match file names.
+.
+.SH "SEE ALSO"
+.SS "Regular Manual Pages"
+.BR awk (1),
+.BR cmp (1),
+.BR diff (1),
+.BR find (1),
+.BR perl (1),
+.BR sed (1),
+.BR sort (1),
+.BR xargs (1),
+.BR read (2),
+.BR pcre (3),
+.BR pcresyntax (3),
+.BR pcrepattern (3),
+.BR terminfo (5),
+.BR glob (7),
+.BR regex (7)
+.SS "Full Documentation"
+A
+.UR https://www.gnu.org/software/grep/manual/
+complete manual
+.UE
+is available.
+If the
+.B info
+and
+.B grep
+programs are properly installed at your site, the command
+.IP
+.B info grep
+.PP
+should give you access to the complete manual.
+.
+.\" Work around problems with some troff -man implementations.
+.br
+.
+.\" Format for Emacs-maintained Dt string defined at this file's start.
+.\" Local variables:
+.\" time-stamp-format: "%:y-%02m-%02d"
+.\" End:
diff --git a/src/grep/doc/grep.info b/src/grep/doc/grep.info
new file mode 100644
index 0000000..9e1a4bd
--- /dev/null
+++ b/src/grep/doc/grep.info
@@ -0,0 +1,2567 @@
+This is grep.info, produced by makeinfo version 6.8 from grep.texi.
+
+This manual is for ‘grep’, a pattern matching engine.
+
+   Copyright © 1999–2002, 2005, 2008–2021 Free Software Foundation, Inc.
+
+     Permission is granted to copy, distribute and/or modify this
+     document under the terms of the GNU Free Documentation License,
+     Version 1.3 or any later version published by the Free Software
+     Foundation; with no Invariant Sections, with no Front-Cover Texts,
+     and with no Back-Cover Texts. A copy of the license is included in
+     the section entitled “GNU Free Documentation License”.
+INFO-DIR-SECTION Text creation and manipulation
+START-INFO-DIR-ENTRY
+* grep: (grep).                 Print lines that match patterns.
+END-INFO-DIR-ENTRY
+
+
+File: grep.info,  Node: Top,  Next: Introduction,  Up: (dir)
+
+grep
+****
+
+‘grep’ prints lines that contain a match for one or more patterns.
+
+   This manual is for version 3.7 of GNU Grep.
+
+   This manual is for ‘grep’, a pattern matching engine.
+
+   Copyright © 1999–2002, 2005, 2008–2021 Free Software Foundation, Inc.
+
+     Permission is granted to copy, distribute and/or modify this
+     document under the terms of the GNU Free Documentation License,
+     Version 1.3 or any later version published by the Free Software
+     Foundation; with no Invariant Sections, with no Front-Cover Texts,
+     and with no Back-Cover Texts.  A copy of the license is included in
+     the section entitled “GNU Free Documentation License”.
+
+* Menu:
+
+* Introduction::                Introduction.
+* Invoking::                    Command-line options, environment, exit status.
+* Regular Expressions::         Regular Expressions.
+* Usage::                       Examples.
+* Performance::                 Performance tuning.
+* Reporting Bugs::              Reporting Bugs.
+* Copying::                     License terms for this manual.
+* Index::                       Combined index.
+
+
+File: grep.info,  Node: Introduction,  Next: Invoking,  Prev: Top,  Up: Top
+
+1 Introduction
+**************
+
+Given one or more patterns, ‘grep’ searches input files for matches to
+the patterns.  When it finds a match in a line, it copies the line to
+standard output (by default), or produces whatever other sort of output
+you have requested with options.
+
+   Though ‘grep’ expects to do the matching on text, it has no limits on
+input line length other than available memory, and it can match
+arbitrary characters within a line.  If the final byte of an input file
+is not a newline, ‘grep’ silently supplies one.  Since newline is also a
+separator for the list of patterns, there is no way to match newline
+characters in a text.
+
+
+File: grep.info,  Node: Invoking,  Next: Regular Expressions,  Prev: Introduction,  Up: Top
+
+2 Invoking ‘grep’
+*****************
+
+The general synopsis of the ‘grep’ command line is
+
+     grep [OPTION...] [PATTERNS] [FILE...]
+
+There can be zero or more OPTION arguments, and zero or more FILE
+arguments.  The PATTERNS argument contains one or more patterns
+separated by newlines, and is omitted when patterns are given via the
+‘-e PATTERNS’ or ‘-f FILE’ options.  Typically PATTERNS should be quoted
+when ‘grep’ is used in a shell command.
+
+* Menu:
+
+* Command-line Options::        Short and long names, grouped by category.
+* Environment Variables::       POSIX, GNU generic, and GNU grep specific.
+* Exit Status::                 Exit status returned by ‘grep’.
+* grep Programs::               ‘grep’ programs.
+
+
+File: grep.info,  Node: Command-line Options,  Next: Environment Variables,  Up: Invoking
+
+2.1 Command-line Options
+========================
+
+‘grep’ comes with a rich set of options: some from POSIX and some being
+GNU extensions.  Long option names are always a GNU extension, even for
+options that are from POSIX specifications.  Options that are specified
+by POSIX, under their short names, are explicitly marked as such to
+facilitate POSIX-portable programming.  A few option names are provided
+for compatibility with older or more exotic implementations.
+
+* Menu:
+
+* Generic Program Information::
+* Matching Control::
+* General Output Control::
+* Output Line Prefix Control::
+* Context Line Control::
+* File and Directory Selection::
+* Other Options::
+
+   Several additional options control which variant of the ‘grep’
+matching engine is used.  *Note grep Programs::.
+
+
+File: grep.info,  Node: Generic Program Information,  Next: Matching Control,  Up: Command-line Options
+
+2.1.1 Generic Program Information
+---------------------------------
+
+‘--help’
+     Print a usage message briefly summarizing the command-line options
+     and the bug-reporting address, then exit.
+
+‘-V’
+‘--version’
+     Print the version number of ‘grep’ to the standard output stream.
+     This version number should be included in all bug reports.
+
+
+File: grep.info,  Node: Matching Control,  Next: General Output Control,  Prev: Generic Program Information,  Up: Command-line Options
+
+2.1.2 Matching Control
+----------------------
+
+‘-e PATTERNS’
+‘--regexp=PATTERNS’
+     Use PATTERNS as one or more patterns; newlines within PATTERNS
+     separate each pattern from the next.  If this option is used
+     multiple times or is combined with the ‘-f’ (‘--file’) option,
+     search for all patterns given.  Typically PATTERNS should be quoted
+     when ‘grep’ is used in a shell command.  (‘-e’ is specified by
+     POSIX.)
+
+‘-f FILE’
+‘--file=FILE’
+     Obtain patterns from FILE, one per line.  If this option is used
+     multiple times or is combined with the ‘-e’ (‘--regexp’) option,
+     search for all patterns given.  The empty file contains zero
+     patterns, and therefore matches nothing.  (‘-f’ is specified by
+     POSIX.)
+
+‘-i’
+‘-y’
+‘--ignore-case’
+     Ignore case distinctions in patterns and input data, so that
+     characters that differ only in case match each other.  Although
+     this is straightforward when letters differ in case only via
+     lowercase-uppercase pairs, the behavior is unspecified in other
+     situations.  For example, uppercase “S” has an unusual lowercase
+     counterpart “ſ” (Unicode character U+017F, LATIN SMALL LETTER LONG
+     S) in many locales, and it is unspecified whether this unusual
+     character matches “S” or “s” even though uppercasing it yields “S”.
+     Another example: the lowercase German letter “ß” (U+00DF, LATIN
+     SMALL LETTER SHARP S) is normally capitalized as the two-character
+     string “SS” but it does not match “SS”, and it might not match the
+     uppercase letter “ẞ” (U+1E9E, LATIN CAPITAL LETTER SHARP S) even
+     though lowercasing the latter yields the former.
+
+     ‘-y’ is an obsolete synonym that is provided for compatibility.
+     (‘-i’ is specified by POSIX.)
+
+‘--no-ignore-case’
+     Do not ignore case distinctions in patterns and input data.  This
+     is the default.  This option is useful for passing to shell scripts
+     that already use ‘-i’, in order to cancel its effects because the
+     two options override each other.
+
+‘-v’
+‘--invert-match’
+     Invert the sense of matching, to select non-matching lines.  (‘-v’
+     is specified by POSIX.)
+
+‘-w’
+‘--word-regexp’
+     Select only those lines containing matches that form whole words.
+     The test is that the matching substring must either be at the
+     beginning of the line, or preceded by a non-word constituent
+     character.  Similarly, it must be either at the end of the line or
+     followed by a non-word constituent character.  Word constituent
+     characters are letters, digits, and the underscore.  This option
+     has no effect if ‘-x’ is also specified.
+
+     Because the ‘-w’ option can match a substring that does not begin
+     and end with word constituents, it differs from surrounding a
+     regular expression with ‘\<’ and ‘\>’.  For example, although ‘grep
+     -w @’ matches a line containing only ‘@’, ‘grep '\<@\>'’ cannot
+     match any line because ‘@’ is not a word constituent.  *Note The
+     Backslash Character and Special Expressions::.
+
+‘-x’
+‘--line-regexp’
+     Select only those matches that exactly match the whole line.  For
+     regular expression patterns, this is like parenthesizing each
+     pattern and then surrounding it with ‘^’ and ‘$’.  (‘-x’ is
+     specified by POSIX.)
+
+
+File: grep.info,  Node: General Output Control,  Next: Output Line Prefix Control,  Prev: Matching Control,  Up: Command-line Options
+
+2.1.3 General Output Control
+----------------------------
+
+‘-c’
+‘--count’
+     Suppress normal output; instead print a count of matching lines for
+     each input file.  With the ‘-v’ (‘--invert-match’) option, count
+     non-matching lines.  (‘-c’ is specified by POSIX.)
+
+‘--color[=WHEN]’
+‘--colour[=WHEN]’
+     Surround the matched (non-empty) strings, matching lines, context
+     lines, file names, line numbers, byte offsets, and separators (for
+     fields and groups of context lines) with escape sequences to
+     display them in color on the terminal.  The colors are defined by
+     the environment variable ‘GREP_COLORS’ and default to
+     ‘ms=01;31:mc=01;31:sl=:cx=:fn=35:ln=32:bn=32:se=36’ for bold red
+     matched text, magenta file names, green line numbers, green byte
+     offsets, cyan separators, and default terminal colors otherwise.
+     The deprecated environment variable ‘GREP_COLOR’ is still
+     supported, but its setting does not have priority; it defaults to
+     ‘01;31’ (bold red) which only covers the color for matched text.
+     WHEN is ‘never’, ‘always’, or ‘auto’.
+
+‘-L’
+‘--files-without-match’
+     Suppress normal output; instead print the name of each input file
+     from which no output would normally have been printed.
+
+‘-l’
+‘--files-with-matches’
+     Suppress normal output; instead print the name of each input file
+     from which output would normally have been printed.  Scanning each
+     input file stops upon first match.  (‘-l’ is specified by POSIX.)
+
+‘-m NUM’
+‘--max-count=NUM’
+     Stop after the first NUM selected lines.  If the input is standard
+     input from a regular file, and NUM selected lines are output,
+     ‘grep’ ensures that the standard input is positioned just after the
+     last selected line before exiting, regardless of the presence of
+     trailing context lines.  This enables a calling process to resume a
+     search.  For example, the following shell script makes use of it:
+
+          while grep -m 1 'PATTERN'
+          do
+            echo xxxx
+          done < FILE
+
+     But the following probably will not work because a pipe is not a
+     regular file:
+
+          # This probably will not work.
+          cat FILE |
+          while grep -m 1 'PATTERN'
+          do
+            echo xxxx
+          done
+
+     When ‘grep’ stops after NUM selected lines, it outputs any trailing
+     context lines.  When the ‘-c’ or ‘--count’ option is also used,
+     ‘grep’ does not output a count greater than NUM.  When the ‘-v’ or
+     ‘--invert-match’ option is also used, ‘grep’ stops after outputting
+     NUM non-matching lines.
+
+‘-o’
+‘--only-matching’
+     Print only the matched (non-empty) parts of matching lines, with
+     each such part on a separate output line.  Output lines use the
+     same delimiters as input, and delimiters are null bytes if ‘-z’
+     (‘--null-data’) is also used (*note Other Options::).
+
+‘-q’
+‘--quiet’
+‘--silent’
+     Quiet; do not write anything to standard output.  Exit immediately
+     with zero status if any match is found, even if an error was
+     detected.  Also see the ‘-s’ or ‘--no-messages’ option.  (‘-q’ is
+     specified by POSIX.)
+
+‘-s’
+‘--no-messages’
+     Suppress error messages about nonexistent or unreadable files.
+     Portability note: unlike GNU ‘grep’, 7th Edition Unix ‘grep’ did
+     not conform to POSIX, because it lacked ‘-q’ and its ‘-s’ option
+     behaved like GNU ‘grep’’s ‘-q’ option.(1)  USG-style ‘grep’ also
+     lacked ‘-q’ but its ‘-s’ option behaved like GNU ‘grep’’s.
+     Portable shell scripts should avoid both ‘-q’ and ‘-s’ and should
+     redirect standard and error output to ‘/dev/null’ instead.  (‘-s’
+     is specified by POSIX.)
+
+   ---------- Footnotes ----------
+
+   (1) Of course, 7th Edition Unix predated POSIX by several years!
+
+
+File: grep.info,  Node: Output Line Prefix Control,  Next: Context Line Control,  Prev: General Output Control,  Up: Command-line Options
+
+2.1.4 Output Line Prefix Control
+--------------------------------
+
+When several prefix fields are to be output, the order is always file
+name, line number, and byte offset, regardless of the order in which
+these options were specified.
+
+‘-b’
+‘--byte-offset’
+     Print the 0-based byte offset within the input file before each
+     line of output.  If ‘-o’ (‘--only-matching’) is specified, print
+     the offset of the matching part itself.
+
+‘-H’
+‘--with-filename’
+     Print the file name for each match.  This is the default when there
+     is more than one file to search.
+
+‘-h’
+‘--no-filename’
+     Suppress the prefixing of file names on output.  This is the
+     default when there is only one file (or only standard input) to
+     search.
+
+‘--label=LABEL’
+     Display input actually coming from standard input as input coming
+     from file LABEL.  This can be useful for commands that transform a
+     file’s contents before searching; e.g.:
+
+          gzip -cd foo.gz | grep --label=foo -H 'some pattern'
+
+‘-n’
+‘--line-number’
+     Prefix each line of output with the 1-based line number within its
+     input file.  (‘-n’ is specified by POSIX.)
+
+‘-T’
+‘--initial-tab’
+     Make sure that the first character of actual line content lies on a
+     tab stop, so that the alignment of tabs looks normal.  This is
+     useful with options that prefix their output to the actual content:
+     ‘-H’, ‘-n’, and ‘-b’.  This may also prepend spaces to output line
+     numbers and byte offsets so that lines from a single file all start
+     at the same column.
+
+‘-Z’
+‘--null’
+     Output a zero byte (the ASCII NUL character) instead of the
+     character that normally follows a file name.  For example, ‘grep
+     -lZ’ outputs a zero byte after each file name instead of the usual
+     newline.  This option makes the output unambiguous, even in the
+     presence of file names containing unusual characters like newlines.
+     This option can be used with commands like ‘find -print0’, ‘perl
+     -0’, ‘sort -z’, and ‘xargs -0’ to process arbitrary file names,
+     even those that contain newline characters.
+
+
+File: grep.info,  Node: Context Line Control,  Next: File and Directory Selection,  Prev: Output Line Prefix Control,  Up: Command-line Options
+
+2.1.5 Context Line Control
+--------------------------
+
+“Context lines” are non-matching lines that are near a matching line.
+They are output only if one of the following options are used.
+Regardless of how these options are set, ‘grep’ never outputs any given
+line more than once.  If the ‘-o’ (‘--only-matching’) option is
+specified, these options have no effect and a warning is given upon
+their use.
+
+‘-A NUM’
+‘--after-context=NUM’
+     Print NUM lines of trailing context after matching lines.
+
+‘-B NUM’
+‘--before-context=NUM’
+     Print NUM lines of leading context before matching lines.
+
+‘-C NUM’
+‘-NUM’
+‘--context=NUM’
+     Print NUM lines of leading and trailing output context.
+
+‘--group-separator=STRING’
+     When ‘-A’, ‘-B’ or ‘-C’ are in use, print STRING instead of ‘--’
+     between groups of lines.
+
+‘--no-group-separator’
+     When ‘-A’, ‘-B’ or ‘-C’ are in use, do not print a separator
+     between groups of lines.
+
+   Here are some points about how ‘grep’ chooses the separator to print
+between prefix fields and line content:
+
+   • Matching lines normally use ‘:’ as a separator between prefix
+     fields and actual line content.
+
+   • Context (i.e., non-matching) lines use ‘-’ instead.
+
+   • When context is not specified, matching lines are simply output one
+     right after another.
+
+   • When context is specified, lines that are adjacent in the input
+     form a group and are output one right after another, while by
+     default a separator appears between non-adjacent groups.
+
+   • The default separator is a ‘--’ line; its presence and appearance
+     can be changed with the options above.
+
+   • Each group may contain several matching lines when they are close
+     enough to each other that two adjacent groups connect and can merge
+     into a single contiguous one.
+
+
+File: grep.info,  Node: File and Directory Selection,  Next: Other Options,  Prev: Context Line Control,  Up: Command-line Options
+
+2.1.6 File and Directory Selection
+----------------------------------
+
+‘-a’
+‘--text’
+     Process a binary file as if it were text; this is equivalent to the
+     ‘--binary-files=text’ option.
+
+‘--binary-files=TYPE’
+     If a file’s data or metadata indicate that the file contains binary
+     data, assume that the file is of type TYPE.  Non-text bytes
+     indicate binary data; these are either output bytes that are
+     improperly encoded for the current locale (*note Environment
+     Variables::), or null input bytes when the ‘-z’ (‘--null-data’)
+     option is not given (*note Other Options::).
+
+     By default, TYPE is ‘binary’, and ‘grep’ suppresses output after
+     null input binary data is discovered, and suppresses output lines
+     that contain improperly encoded data.  When some output is
+     suppressed, ‘grep’ follows any output with a one-line message
+     saying that a binary file matches.
+
+     If TYPE is ‘without-match’, when ‘grep’ discovers null input binary
+     data it assumes that the rest of the file does not match; this is
+     equivalent to the ‘-I’ option.
+
+     If TYPE is ‘text’, ‘grep’ processes binary data as if it were text;
+     this is equivalent to the ‘-a’ option.
+
+     When TYPE is ‘binary’, ‘grep’ may treat non-text bytes as line
+     terminators even without the ‘-z’ (‘--null-data’) option.  This
+     means choosing ‘binary’ versus ‘text’ can affect whether a pattern
+     matches a file.  For example, when TYPE is ‘binary’ the pattern
+     ‘q$’ might match ‘q’ immediately followed by a null byte, even
+     though this is not matched when TYPE is ‘text’.  Conversely, when
+     TYPE is ‘binary’ the pattern ‘.’ (period) might not match a null
+     byte.
+
+     _Warning:_ The ‘-a’ (‘--binary-files=text’) option might output
+     binary garbage, which can have nasty side effects if the output is
+     a terminal and if the terminal driver interprets some of it as
+     commands.  On the other hand, when reading files whose text
+     encodings are unknown, it can be helpful to use ‘-a’ or to set
+     ‘LC_ALL='C'’ in the environment, in order to find more matches even
+     if the matches are unsafe for direct display.
+
+‘-D ACTION’
+‘--devices=ACTION’
+     If an input file is a device, FIFO, or socket, use ACTION to
+     process it.  If ACTION is ‘read’, all devices are read just as if
+     they were ordinary files.  If ACTION is ‘skip’, devices, FIFOs, and
+     sockets are silently skipped.  By default, devices are read if they
+     are on the command line or if the ‘-R’ (‘--dereference-recursive’)
+     option is used, and are skipped if they are encountered recursively
+     and the ‘-r’ (‘--recursive’) option is used.  This option has no
+     effect on a file that is read via standard input.
+
+‘-d ACTION’
+‘--directories=ACTION’
+     If an input file is a directory, use ACTION to process it.  By
+     default, ACTION is ‘read’, which means that directories are read
+     just as if they were ordinary files (some operating systems and
+     file systems disallow this, and will cause ‘grep’ to print error
+     messages for every directory or silently skip them).  If ACTION is
+     ‘skip’, directories are silently skipped.  If ACTION is ‘recurse’,
+     ‘grep’ reads all files under each directory, recursively, following
+     command-line symbolic links and skipping other symlinks; this is
+     equivalent to the ‘-r’ option.
+
+‘--exclude=GLOB’
+     Skip any command-line file with a name suffix that matches the
+     pattern GLOB, using wildcard matching; a name suffix is either the
+     whole name, or a trailing part that starts with a non-slash
+     character immediately after a slash (‘/’) in the name.  When
+     searching recursively, skip any subfile whose base name matches
+     GLOB; the base name is the part after the last slash.  A pattern
+     can use ‘*’, ‘?’, and ‘[’...‘]’  as wildcards, and ‘\’ to quote a
+     wildcard or backslash character literally.
+
+‘--exclude-from=FILE’
+     Skip files whose name matches any of the patterns read from FILE
+     (using wildcard matching as described under ‘--exclude’).
+
+‘--exclude-dir=GLOB’
+     Skip any command-line directory with a name suffix that matches the
+     pattern GLOB.  When searching recursively, skip any subdirectory
+     whose base name matches GLOB.  Ignore any redundant trailing
+     slashes in GLOB.
+
+‘-I’
+     Process a binary file as if it did not contain matching data; this
+     is equivalent to the ‘--binary-files=without-match’ option.
+
+‘--include=GLOB’
+     Search only files whose name matches GLOB, using wildcard matching
+     as described under ‘--exclude’.  If contradictory ‘--include’ and
+     ‘--exclude’ options are given, the last matching one wins.  If no
+     ‘--include’ or ‘--exclude’ options match, a file is included unless
+     the first such option is ‘--include’.
+
+‘-r’
+‘--recursive’
+     For each directory operand, read and process all files in that
+     directory, recursively.  Follow symbolic links on the command line,
+     but skip symlinks that are encountered recursively.  Note that if
+     no file operand is given, grep searches the working directory.
+     This is the same as the ‘--directories=recurse’ option.
+
+‘-R’
+‘--dereference-recursive’
+     For each directory operand, read and process all files in that
+     directory, recursively, following all symbolic links.
+
+
+File: grep.info,  Node: Other Options,  Prev: File and Directory Selection,  Up: Command-line Options
+
+2.1.7 Other Options
+-------------------
+
+‘--’
+     Delimit the option list.  Later arguments, if any, are treated as
+     operands even if they begin with ‘-’.  For example, ‘grep PAT --
+     -file1 file2’ searches for the pattern PAT in the files named
+     ‘-file1’ and ‘file2’.
+
+‘--line-buffered’
+     Use line buffering for standard output, regardless of output
+     device.  By default, standard output is line buffered for
+     interactive devices, and is fully buffered otherwise.  With full
+     buffering, the output buffer is flushed when full; with line
+     buffering, the buffer is also flushed after every output line.  The
+     buffer size is system dependent.
+
+‘-U’
+‘--binary’
+     On platforms that distinguish between text and binary I/O, use the
+     latter when reading and writing files other than the user’s
+     terminal, so that all input bytes are read and written as-is.  This
+     overrides the default behavior where ‘grep’ follows the operating
+     system’s advice whether to use text or binary I/O.  On MS-Windows
+     when ‘grep’ uses text I/O it reads a carriage return–newline pair
+     as a newline and a Control-Z as end-of-file, and it writes a
+     newline as a carriage return–newline pair.
+
+     When using text I/O ‘--byte-offset’ (‘-b’) counts and
+     ‘--binary-files’ heuristics apply to input data after text-I/O
+     processing.  Also, the ‘--binary-files’ heuristics need not agree
+     with the ‘--binary’ option; that is, they may treat the data as
+     text even if ‘--binary’ is given, or vice versa.  *Note File and
+     Directory Selection::.
+
+     This option has no effect on GNU and other POSIX-compatible
+     platforms, which do not distinguish text from binary I/O.
+
+‘-z’
+‘--null-data’
+     Treat input and output data as sequences of lines, each terminated
+     by a zero byte (the ASCII NUL character) instead of a newline.
+     Like the ‘-Z’ or ‘--null’ option, this option can be used with
+     commands like ‘sort -z’ to process arbitrary file names.
+
+
+File: grep.info,  Node: Environment Variables,  Next: Exit Status,  Prev: Command-line Options,  Up: Invoking
+
+2.2 Environment Variables
+=========================
+
+The behavior of ‘grep’ is affected by the following environment
+variables.
+
+   The locale for category ‘LC_FOO’ is specified by examining the three
+environment variables ‘LC_ALL’, ‘LC_FOO’, and ‘LANG’, in that order.
+The first of these variables that is set specifies the locale.  For
+example, if ‘LC_ALL’ is not set, but ‘LC_COLLATE’ is set to ‘pt_BR’,
+then the Brazilian Portuguese locale is used for the ‘LC_COLLATE’
+category.  As a special case for ‘LC_MESSAGES’ only, the environment
+variable ‘LANGUAGE’ can contain a colon-separated list of languages that
+overrides the three environment variables that ordinarily specify the
+‘LC_MESSAGES’ category.  The ‘C’ locale is used if none of these
+environment variables are set, if the locale catalog is not installed,
+or if ‘grep’ was not compiled with national language support (NLS). The
+shell command ‘locale -a’ lists locales that are currently available.
+
+   Many of the environment variables in the following list let you
+control highlighting using Select Graphic Rendition (SGR) commands
+interpreted by the terminal or terminal emulator.  (See the section in
+the documentation of your text terminal for permitted values and their
+meanings as character attributes.)  These substring values are integers
+in decimal representation and can be concatenated with semicolons.
+‘grep’ takes care of assembling the result into a complete SGR sequence
+(‘\33[’...‘m’).  Common values to concatenate include ‘1’ for bold, ‘4’
+for underline, ‘5’ for blink, ‘7’ for inverse, ‘39’ for default
+foreground color, ‘30’ to ‘37’ for foreground colors, ‘90’ to ‘97’ for
+16-color mode foreground colors, ‘38;5;0’ to ‘38;5;255’ for 88-color and
+256-color modes foreground colors, ‘49’ for default background color,
+‘40’ to ‘47’ for background colors, ‘100’ to ‘107’ for 16-color mode
+background colors, and ‘48;5;0’ to ‘48;5;255’ for 88-color and 256-color
+modes background colors.
+
+   The two-letter names used in the ‘GREP_COLORS’ environment variable
+(and some of the others) refer to terminal “capabilities,” the ability
+of a terminal to highlight text, or change its color, and so on.  These
+capabilities are stored in an online database and accessed by the
+‘terminfo’ library.
+
+‘GREP_COLOR’
+     This variable specifies the color used to highlight matched
+     (non-empty) text.  It is deprecated in favor of ‘GREP_COLORS’, but
+     still supported.  The ‘mt’, ‘ms’, and ‘mc’ capabilities of
+     ‘GREP_COLORS’ have priority over it.  It can only specify the color
+     used to highlight the matching non-empty text in any matching line
+     (a selected line when the ‘-v’ command-line option is omitted, or a
+     context line when ‘-v’ is specified).  The default is ‘01;31’,
+     which means a bold red foreground text on the terminal’s default
+     background.
+
+‘GREP_COLORS’
+     This variable specifies the colors and other attributes used to
+     highlight various parts of the output.  Its value is a
+     colon-separated list of ‘terminfo’ capabilities that defaults to
+     ‘ms=01;31:mc=01;31:sl=:cx=:fn=35:ln=32:bn=32:se=36’ with the ‘rv’
+     and ‘ne’ boolean capabilities omitted (i.e., false).  Supported
+     capabilities are as follows.
+
+     ‘sl=’
+          SGR substring for whole selected lines (i.e., matching lines
+          when the ‘-v’ command-line option is omitted, or non-matching
+          lines when ‘-v’ is specified).  If however the boolean ‘rv’
+          capability and the ‘-v’ command-line option are both
+          specified, it applies to context matching lines instead.  The
+          default is empty (i.e., the terminal’s default color pair).
+
+     ‘cx=’
+          SGR substring for whole context lines (i.e., non-matching
+          lines when the ‘-v’ command-line option is omitted, or
+          matching lines when ‘-v’ is specified).  If however the
+          boolean ‘rv’ capability and the ‘-v’ command-line option are
+          both specified, it applies to selected non-matching lines
+          instead.  The default is empty (i.e., the terminal’s default
+          color pair).
+
+     ‘rv’
+          Boolean value that reverses (swaps) the meanings of the ‘sl=’
+          and ‘cx=’ capabilities when the ‘-v’ command-line option is
+          specified.  The default is false (i.e., the capability is
+          omitted).
+
+     ‘mt=01;31’
+          SGR substring for matching non-empty text in any matching line
+          (i.e., a selected line when the ‘-v’ command-line option is
+          omitted, or a context line when ‘-v’ is specified).  Setting
+          this is equivalent to setting both ‘ms=’ and ‘mc=’ at once to
+          the same value.  The default is a bold red text foreground
+          over the current line background.
+
+     ‘ms=01;31’
+          SGR substring for matching non-empty text in a selected line.
+          (This is used only when the ‘-v’ command-line option is
+          omitted.)  The effect of the ‘sl=’ (or ‘cx=’ if ‘rv’)
+          capability remains active when this takes effect.  The default
+          is a bold red text foreground over the current line
+          background.
+
+     ‘mc=01;31’
+          SGR substring for matching non-empty text in a context line.
+          (This is used only when the ‘-v’ command-line option is
+          specified.)  The effect of the ‘cx=’ (or ‘sl=’ if ‘rv’)
+          capability remains active when this takes effect.  The default
+          is a bold red text foreground over the current line
+          background.
+
+     ‘fn=35’
+          SGR substring for file names prefixing any content line.  The
+          default is a magenta text foreground over the terminal’s
+          default background.
+
+     ‘ln=32’
+          SGR substring for line numbers prefixing any content line.
+          The default is a green text foreground over the terminal’s
+          default background.
+
+     ‘bn=32’
+          SGR substring for byte offsets prefixing any content line.
+          The default is a green text foreground over the terminal’s
+          default background.
+
+     ‘se=36’
+          SGR substring for separators that are inserted between
+          selected line fields (‘:’), between context line fields (‘-’),
+          and between groups of adjacent lines when nonzero context is
+          specified (‘--’).  The default is a cyan text foreground over
+          the terminal’s default background.
+
+     ‘ne’
+          Boolean value that prevents clearing to the end of line using
+          Erase in Line (EL) to Right (‘\33[K’) each time a colorized
+          item ends.  This is needed on terminals on which EL is not
+          supported.  It is otherwise useful on terminals for which the
+          ‘back_color_erase’ (‘bce’) boolean ‘terminfo’ capability does
+          not apply, when the chosen highlight colors do not affect the
+          background, or when EL is too slow or causes too much flicker.
+          The default is false (i.e., the capability is omitted).
+
+     Note that boolean capabilities have no ‘=’...  part.  They are
+     omitted (i.e., false) by default and become true when specified.
+
+‘LC_ALL’
+‘LC_COLLATE’
+‘LANG’
+     These variables specify the locale for the ‘LC_COLLATE’ category,
+     which might affect how range expressions like ‘[a-z]’ are
+     interpreted.
+
+‘LC_ALL’
+‘LC_CTYPE’
+‘LANG’
+     These variables specify the locale for the ‘LC_CTYPE’ category,
+     which determines the type of characters, e.g., which characters are
+     whitespace.  This category also determines the character encoding.
+     *Note Character Encoding::.
+
+‘LANGUAGE’
+‘LC_ALL’
+‘LC_MESSAGES’
+‘LANG’
+     These variables specify the locale for the ‘LC_MESSAGES’ category,
+     which determines the language that ‘grep’ uses for messages.  The
+     default ‘C’ locale uses American English messages.
+
+‘POSIXLY_CORRECT’
+     If set, ‘grep’ behaves as POSIX requires; otherwise, ‘grep’ behaves
+     more like other GNU programs.  POSIX requires that options that
+     follow file names must be treated as file names; by default, such
+     options are permuted to the front of the operand list and are
+     treated as options.  Also, ‘POSIXLY_CORRECT’ disables special
+     handling of an invalid bracket expression.  *Note
+     invalid-bracket-expr::.
+
+‘_N_GNU_nonoption_argv_flags_’
+     (Here ‘N’ is ‘grep’’s numeric process ID.) If the Ith character of
+     this environment variable’s value is ‘1’, do not consider the Ith
+     operand of ‘grep’ to be an option, even if it appears to be one.  A
+     shell can put this variable in the environment for each command it
+     runs, specifying which operands are the results of file name
+     wildcard expansion and therefore should not be treated as options.
+     This behavior is available only with the GNU C library, and only
+     when ‘POSIXLY_CORRECT’ is not set.
+
+   The ‘GREP_OPTIONS’ environment variable of ‘grep’ 2.20 and earlier is
+no longer supported, as it caused problems when writing portable
+scripts.  To make arbitrary changes to how ‘grep’ works, you can use an
+alias or script instead.  For example, if ‘grep’ is in the directory
+‘/usr/bin’ you can prepend ‘$HOME/bin’ to your ‘PATH’ and create an
+executable script ‘$HOME/bin/grep’ containing the following:
+
+     #! /bin/sh
+     export PATH=/usr/bin
+     exec grep --color=auto --devices=skip "$@"
+
+
+File: grep.info,  Node: Exit Status,  Next: grep Programs,  Prev: Environment Variables,  Up: Invoking
+
+2.3 Exit Status
+===============
+
+Normally the exit status is 0 if a line is selected, 1 if no lines were
+selected, and 2 if an error occurred.  However, if the ‘-q’ or ‘--quiet’
+or ‘--silent’ option is used and a line is selected, the exit status is
+0 even if an error occurred.  Other ‘grep’ implementations may exit with
+status greater than 2 on error.
+
+
+File: grep.info,  Node: grep Programs,  Prev: Exit Status,  Up: Invoking
+
+2.4 ‘grep’ Programs
+===================
+
+‘grep’ searches the named input files for lines containing a match to
+the given patterns.  By default, ‘grep’ prints the matching lines.  A
+file named ‘-’ stands for standard input.  If no input is specified,
+‘grep’ searches the working directory ‘.’ if given a command-line option
+specifying recursion; otherwise, ‘grep’ searches standard input.  There
+are four major variants of ‘grep’, controlled by the following options.
+
+‘-G’
+‘--basic-regexp’
+     Interpret patterns as basic regular expressions (BREs).  This is
+     the default.
+
+‘-E’
+‘--extended-regexp’
+     Interpret patterns as extended regular expressions (EREs).  (‘-E’
+     is specified by POSIX.)
+
+‘-F’
+‘--fixed-strings’
+     Interpret patterns as fixed strings, not regular expressions.
+     (‘-F’ is specified by POSIX.)
+
+‘-P’
+‘--perl-regexp’
+     Interpret patterns as Perl-compatible regular expressions (PCREs).
+     PCRE support is here to stay, but consider this option experimental
+     when combined with the ‘-z’ (‘--null-data’) option, and note that
+     ‘grep -P’ may warn of unimplemented features.  *Note Other
+     Options::.
+
+   In addition, two variant programs ‘egrep’ and ‘fgrep’ are available.
+‘egrep’ is the same as ‘grep -E’.  ‘fgrep’ is the same as ‘grep -F’.
+Direct invocation as either ‘egrep’ or ‘fgrep’ is deprecated, but is
+provided to allow historical applications that rely on them to run
+unmodified.
+
+
+File: grep.info,  Node: Regular Expressions,  Next: Usage,  Prev: Invoking,  Up: Top
+
+3 Regular Expressions
+*********************
+
+A “regular expression” is a pattern that describes a set of strings.
+Regular expressions are constructed analogously to arithmetic
+expressions, by using various operators to combine smaller expressions.
+‘grep’ understands three different versions of regular expression
+syntax: basic (BRE), extended (ERE), and Perl-compatible (PCRE). In GNU
+‘grep’, there is no difference in available functionality between the
+basic and extended syntaxes.  In other implementations, basic regular
+expressions are less powerful.  The following description applies to
+extended regular expressions; differences for basic regular expressions
+are summarized afterwards.  Perl-compatible regular expressions give
+additional functionality, and are documented in the pcresyntax(3) and
+pcrepattern(3) manual pages, but work only if PCRE is available in the
+system.
+
+* Menu:
+
+* Fundamental Structure::
+* Character Classes and Bracket Expressions::
+* The Backslash Character and Special Expressions::
+* Anchoring::
+* Back-references and Subexpressions::
+* Basic vs Extended::
+* Character Encoding::
+* Matching Non-ASCII::
+
+
+File: grep.info,  Node: Fundamental Structure,  Next: Character Classes and Bracket Expressions,  Up: Regular Expressions
+
+3.1 Fundamental Structure
+=========================
+
+In regular expressions, the characters ‘.?*+{|()[\^$’ are “special
+characters” and have uses described below.  All other characters are
+“ordinary characters”, and each ordinary character is a regular
+expression that matches itself.
+
+   The period ‘.’ matches any single character.  It is unspecified
+whether ‘.’ matches an encoding error.
+
+   A regular expression may be followed by one of several repetition
+operators; the operators beginning with ‘{’ are called “interval
+expressions”.
+
+‘?’
+     The preceding item is optional and is matched at most once.
+
+‘*’
+     The preceding item is matched zero or more times.
+
+‘+’
+     The preceding item is matched one or more times.
+
+‘{N}’
+     The preceding item is matched exactly N times.
+
+‘{N,}’
+     The preceding item is matched N or more times.
+
+‘{,M}’
+     The preceding item is matched at most M times.  This is a GNU
+     extension.
+
+‘{N,M}’
+     The preceding item is matched at least N times, but not more than M
+     times.
+
+   The empty regular expression matches the empty string.  Two regular
+expressions may be concatenated; the resulting regular expression
+matches any string formed by concatenating two substrings that
+respectively match the concatenated expressions.
+
+   Two regular expressions may be joined by the infix operator ‘|’; the
+resulting regular expression matches any string matching either
+alternate expression.
+
+   Repetition takes precedence over concatenation, which in turn takes
+precedence over alternation.  A whole expression may be enclosed in
+parentheses to override these precedence rules and form a subexpression.
+An unmatched ‘)’ matches just itself.
+
+
+File: grep.info,  Node: Character Classes and Bracket Expressions,  Next: The Backslash Character and Special Expressions,  Prev: Fundamental Structure,  Up: Regular Expressions
+
+3.2 Character Classes and Bracket Expressions
+=============================================
+
+A “bracket expression” is a list of characters enclosed by ‘[’ and ‘]’.
+It matches any single character in that list.  If the first character of
+the list is the caret ‘^’, then it matches any character *not* in the
+list, and it is unspecified whether it matches an encoding error.  For
+example, the regular expression ‘[0123456789]’ matches any single digit,
+whereas ‘[^()]’ matches any single character that is not an opening or
+closing parenthesis, and might or might not match an encoding error.
+
+   Within a bracket expression, a “range expression” consists of two
+characters separated by a hyphen.  It matches any single character that
+sorts between the two characters, inclusive.  In the default C locale,
+the sorting sequence is the native character order; for example, ‘[a-d]’
+is equivalent to ‘[abcd]’.  In other locales, the sorting sequence is
+not specified, and ‘[a-d]’ might be equivalent to ‘[abcd]’ or to
+‘[aBbCcDd]’, or it might fail to match any character, or the set of
+characters that it matches might even be erratic.  To obtain the
+traditional interpretation of bracket expressions, you can use the ‘C’
+locale by setting the ‘LC_ALL’ environment variable to the value ‘C’.
+
+   Finally, certain named classes of characters are predefined within
+bracket expressions, as follows.  Their interpretation depends on the
+‘LC_CTYPE’ locale; for example, ‘[[:alnum:]]’ means the character class
+of numbers and letters in the current locale.
+
+‘[:alnum:]’
+     Alphanumeric characters: ‘[:alpha:]’ and ‘[:digit:]’; in the ‘C’
+     locale and ASCII character encoding, this is the same as
+     ‘[0-9A-Za-z]’.
+
+‘[:alpha:]’
+     Alphabetic characters: ‘[:lower:]’ and ‘[:upper:]’; in the ‘C’
+     locale and ASCII character encoding, this is the same as
+     ‘[A-Za-z]’.
+
+‘[:blank:]’
+     Blank characters: space and tab.
+
+‘[:cntrl:]’
+     Control characters.  In ASCII, these characters have octal codes
+     000 through 037, and 177 (DEL). In other character sets, these are
+     the equivalent characters, if any.
+
+‘[:digit:]’
+     Digits: ‘0 1 2 3 4 5 6 7 8 9’.
+
+‘[:graph:]’
+     Graphical characters: ‘[:alnum:]’ and ‘[:punct:]’.
+
+‘[:lower:]’
+     Lower-case letters; in the ‘C’ locale and ASCII character encoding,
+     this is ‘a b c d e f g h i j k l m n o p q r s t u v w x y z’.
+
+‘[:print:]’
+     Printable characters: ‘[:alnum:]’, ‘[:punct:]’, and space.
+
+‘[:punct:]’
+     Punctuation characters; in the ‘C’ locale and ASCII character
+     encoding, this is ‘! " # $ % & ' ( ) * + , - . / : ; < = > ? @ [ \
+     ] ^ _ ` { | } ~’.
+
+‘[:space:]’
+     Space characters: in the ‘C’ locale, this is tab, newline, vertical
+     tab, form feed, carriage return, and space.  *Note Usage::, for
+     more discussion of matching newlines.
+
+‘[:upper:]’
+     Upper-case letters: in the ‘C’ locale and ASCII character encoding,
+     this is ‘A B C D E F G H I J K L M N O P Q R S T U V W X Y Z’.
+
+‘[:xdigit:]’
+     Hexadecimal digits: ‘0 1 2 3 4 5 6 7 8 9 A B C D E F a b c d e f’.
+
+   Note that the brackets in these class names are part of the symbolic
+names, and must be included in addition to the brackets delimiting the
+bracket expression.
+
+   If you mistakenly omit the outer brackets, and search for say,
+‘[:upper:]’, GNU ‘grep’ prints a diagnostic and exits with status 2, on
+the assumption that you did not intend to search for the nominally
+equivalent regular expression: ‘[:epru]’.  Set the ‘POSIXLY_CORRECT’
+environment variable to disable this feature.
+
+   Special characters lose their special meaning inside bracket
+expressions.
+
+‘]’
+     ends the bracket expression if it’s not the first list item.  So,
+     if you want to make the ‘]’ character a list item, you must put it
+     first.
+
+‘[.’
+     represents the open collating symbol.
+
+‘.]’
+     represents the close collating symbol.
+
+‘[=’
+     represents the open equivalence class.
+
+‘=]’
+     represents the close equivalence class.
+
+‘[:’
+     represents the open character class symbol, and should be followed
+     by a valid character class name.
+
+‘:]’
+     represents the close character class symbol.
+
+‘-’
+     represents the range if it’s not first or last in a list or the
+     ending point of a range.
+
+‘^’
+     represents the characters not in the list.  If you want to make the
+     ‘^’ character a list item, place it anywhere but first.
+
+
+File: grep.info,  Node: The Backslash Character and Special Expressions,  Next: Anchoring,  Prev: Character Classes and Bracket Expressions,  Up: Regular Expressions
+
+3.3 The Backslash Character and Special Expressions
+===================================================
+
+The ‘\’ character followed by a special character is a regular
+expression that matches the special character.  The ‘\’ character, when
+followed by certain ordinary characters, takes a special meaning:
+
+‘\b’
+     Match the empty string at the edge of a word.
+
+‘\B’
+     Match the empty string provided it’s not at the edge of a word.
+
+‘\<’
+     Match the empty string at the beginning of a word.
+
+‘\>’
+     Match the empty string at the end of a word.
+
+‘\w’
+     Match word constituent, it is a synonym for ‘[_[:alnum:]]’.
+
+‘\W’
+     Match non-word constituent, it is a synonym for ‘[^_[:alnum:]]’.
+
+‘\s’
+     Match whitespace, it is a synonym for ‘[[:space:]]’.
+
+‘\S’
+     Match non-whitespace, it is a synonym for ‘[^[:space:]]’.
+
+   For example, ‘\brat\b’ matches the separate word ‘rat’, ‘\Brat\B’
+matches ‘crate’ but not ‘furry rat’.
+
+
+File: grep.info,  Node: Anchoring,  Next: Back-references and Subexpressions,  Prev: The Backslash Character and Special Expressions,  Up: Regular Expressions
+
+3.4 Anchoring
+=============
+
+The caret ‘^’ and the dollar sign ‘$’ are special characters that
+respectively match the empty string at the beginning and end of a line.
+They are termed “anchors”, since they force the match to be “anchored”
+to beginning or end of a line, respectively.
+
+
+File: grep.info,  Node: Back-references and Subexpressions,  Next: Basic vs Extended,  Prev: Anchoring,  Up: Regular Expressions
+
+3.5 Back-references and Subexpressions
+======================================
+
+The back-reference ‘\N’, where N is a single nonzero digit, matches the
+substring previously matched by the Nth parenthesized subexpression of
+the regular expression.  For example, ‘(a)\1’ matches ‘aa’.  If the
+parenthesized subexpression does not participate in the match, the
+back-reference makes the whole match fail; for example, ‘(a)*\1’ fails
+to match ‘a’.  If the parenthesized subexpression matches more than one
+substring, the back-reference refers to the last matched substring; for
+example, ‘^(ab*)*\1$’ matches ‘ababbabb’ but not ‘ababbab’.  When
+multiple regular expressions are given with ‘-e’ or from a file (‘-f
+FILE’), back-references are local to each expression.
+
+   *Note Known Bugs::, for some known problems with back-references.
+
+
+File: grep.info,  Node: Basic vs Extended,  Next: Character Encoding,  Prev: Back-references and Subexpressions,  Up: Regular Expressions
+
+3.6 Basic vs Extended Regular Expressions
+=========================================
+
+In basic regular expressions the characters ‘?’, ‘+’, ‘{’, ‘|’, ‘(’, and
+‘)’ lose their special meaning; instead use the backslashed versions
+‘\?’, ‘\+’, ‘\{’, ‘\|’, ‘\(’, and ‘\)’.  Also, a backslash is needed
+before an interval expression’s closing ‘}’, and an unmatched ‘\)’ is
+invalid.
+
+   Portable scripts should avoid the following constructs, as POSIX says
+they produce undefined results:
+
+   • Extended regular expressions that use back-references.
+   • Basic regular expressions that use ‘\?’, ‘\+’, or ‘\|’.
+   • Empty parenthesized regular expressions like ‘()’.
+   • Empty alternatives (as in, e.g, ‘a|’).
+   • Repetition operators that immediately follow empty expressions,
+     unescaped ‘$’, or other repetition operators.
+   • A backslash escaping an ordinary character (e.g., ‘\S’), unless it
+     is a back-reference.
+   • An unescaped ‘[’ that is not part of a bracket expression.
+   • In extended regular expressions, an unescaped ‘{’ that is not part
+     of an interval expression.
+
+   Traditional ‘egrep’ did not support interval expressions and some
+‘egrep’ implementations use ‘\{’ and ‘\}’ instead, so portable scripts
+should avoid interval expressions in ‘grep -E’ patterns and should use
+‘[{]’ to match a literal ‘{’.
+
+   GNU ‘grep -E’ attempts to support traditional usage by assuming that
+‘{’ is not special if it would be the start of an invalid interval
+expression.  For example, the command ‘grep -E '{1'’ searches for the
+two-character string ‘{1’ instead of reporting a syntax error in the
+regular expression.  POSIX allows this behavior as an extension, but
+portable scripts should avoid it.
+
+
+File: grep.info,  Node: Character Encoding,  Next: Matching Non-ASCII,  Prev: Basic vs Extended,  Up: Regular Expressions
+
+3.7 Character Encoding
+======================
+
+The ‘LC_CTYPE’ locale specifies the encoding of characters in patterns
+and data, that is, whether text is encoded in UTF-8, ASCII, or some
+other encoding.  *Note Environment Variables::.
+
+   In the ‘C’ or ‘POSIX’ locale, every character is encoded as a single
+byte and every byte is a valid character.  In more-complex encodings
+such as UTF-8, a sequence of multiple bytes may be needed to represent a
+character, and some bytes may be encoding errors that do not contribute
+to the representation of any character.  POSIX does not specify the
+behavior of ‘grep’ when patterns or input data contain encoding errors
+or null characters, so portable scripts should avoid such usage.  As an
+extension to POSIX, GNU ‘grep’ treats null characters like any other
+character.  However, unless the ‘-a’ (‘--binary-files=text’) option is
+used, the presence of null characters in input or of encoding errors in
+output causes GNU ‘grep’ to treat the file as binary and suppress
+details about matches.  *Note File and Directory Selection::.
+
+   Regardless of locale, the 103 characters in the POSIX Portable
+Character Set (a subset of ASCII) are always encoded as a single byte,
+and the 128 ASCII characters have their usual single-byte encodings on
+all but oddball platforms.
+
+
+File: grep.info,  Node: Matching Non-ASCII,  Prev: Character Encoding,  Up: Regular Expressions
+
+3.8 Matching Non-ASCII and Non-printable Characters
+===================================================
+
+In a regular expression, non-ASCII and non-printable characters other
+than newline are not special, and represent themselves.  For example, in
+a locale using UTF-8 the command ‘grep 'Λ ω'’ (where the white space
+between ‘Λ’ and the ‘ω’ is a tab character) searches for ‘Λ’ (Unicode
+character U+039B GREEK CAPITAL LETTER LAMBDA), followed by a tab (U+0009
+TAB), followed by ‘ω’ (U+03C9 GREEK SMALL LETTER OMEGA).
+
+   Suppose you want to limit your pattern to only printable characters
+(or even only printable ASCII characters) to keep your script readable
+or portable, but you also want to match specific non-ASCII or non-null
+non-printable characters.  If you are using the ‘-P’ (‘--perl-regexp’)
+option, PCREs give you several ways to do this.  Otherwise, if you are
+using Bash, the GNU project’s shell, you can represent these characters
+via ANSI-C quoting.  For example, the Bash commands ‘grep $'Λ\tω'’ and
+‘grep $'\u039B\t\u03C9'’ both search for the same three-character string
+‘Λ ω’ mentioned earlier.  However, because Bash translates ANSI-C
+quoting before ‘grep’ sees the pattern, this technique should not be
+used to match printable ASCII characters; for example, ‘grep $'\u005E'’
+is equivalent to ‘grep '^'’ and matches any line, not just lines
+containing the character ‘^’ (U+005E CIRCUMFLEX ACCENT).
+
+   Since PCREs and ANSI-C quoting are GNU extensions to POSIX, portable
+shell scripts written in ASCII should use other methods to match
+specific non-ASCII characters.  For example, in a UTF-8 locale the
+command ‘grep "$(printf '\316\233\t\317\211\n')"’ is a portable albeit
+hard-to-read alternative to Bash’s ‘grep $'Λ\tω'’.  However, none of
+these techniques will let you put a null character directly into a
+command-line pattern; null characters can appear only in a pattern
+specified via the ‘-f’ (‘--file’) option.
+
+
+File: grep.info,  Node: Usage,  Next: Performance,  Prev: Regular Expressions,  Up: Top
+
+4 Usage
+*******
+
+Here is an example command that invokes GNU ‘grep’:
+
+     grep -i 'hello.*world' menu.h main.c
+
+This lists all lines in the files ‘menu.h’ and ‘main.c’ that contain the
+string ‘hello’ followed by the string ‘world’; this is because ‘.*’
+matches zero or more characters within a line.  *Note Regular
+Expressions::.  The ‘-i’ option causes ‘grep’ to ignore case, causing it
+to match the line ‘Hello, world!’, which it would not otherwise match.
+
+   Here is a more complex example, showing the location and contents of
+any line containing ‘f’ and ending in ‘.c’, within all files in the
+current directory whose names start with non-‘.’, contain ‘g’, and end
+in ‘.h’.  The ‘-n’ option outputs line numbers, the ‘--’ argument treats
+any later arguments as file names not options even if ‘*g*.h’ expands to
+a file name that starts with ‘-’, and the empty file ‘/dev/null’ causes
+file names to be output even if only one file name happens to be of the
+form ‘*g*.h’.
+
+     grep -n -- 'f.*\.c$' *g*.h /dev/null
+
+Note that the regular expression syntax used in the pattern differs from
+the globbing syntax that the shell uses to match file names.
+
+   *Note Invoking::, for more details about how to invoke ‘grep’.
+
+   Here are some common questions and answers about ‘grep’ usage.
+
+  1. How can I list just the names of matching files?
+
+          grep -l 'main' test-*.c
+
+     lists names of ‘test-*.c’ files in the current directory whose
+     contents mention ‘main’.
+
+  2. How do I search directories recursively?
+
+          grep -r 'hello' /home/gigi
+
+     searches for ‘hello’ in all files under the ‘/home/gigi’ directory.
+     For more control over which files are searched, use ‘find’ and
+     ‘grep’.  For example, the following command searches only C files:
+
+          find /home/gigi -name '*.c' ! -type d \
+            -exec grep -H 'hello' '{}' +
+
+     This differs from the command:
+
+          grep -H 'hello' /home/gigi/*.c
+
+     which merely looks for ‘hello’ in non-hidden C files in
+     ‘/home/gigi’ whose names end in ‘.c’.  The ‘find’ command line
+     above is more similar to the command:
+
+          grep -r --include='*.c' 'hello' /home/gigi
+
+  3. What if a pattern or file has a leading ‘-’?
+
+          grep -- '--cut here--' *
+
+     searches for all lines matching ‘--cut here--’.  Without ‘--’,
+     ‘grep’ would attempt to parse ‘--cut here--’ as a list of options,
+     and there would be similar problems with any file names beginning
+     with ‘-’.
+
+     Alternatively, you can prevent misinterpretation of leading ‘-’ by
+     using ‘-e’ for patterns and leading ‘./’ for files:
+
+          grep -e '--cut here--' ./*
+
+  4. Suppose I want to search for a whole word, not a part of a word?
+
+          grep -w 'hello' test*.log
+
+     searches only for instances of ‘hello’ that are entire words; it
+     does not match ‘Othello’.  For more control, use ‘\<’ and ‘\>’ to
+     match the start and end of words.  For example:
+
+          grep 'hello\>' test*.log
+
+     searches only for words ending in ‘hello’, so it matches the word
+     ‘Othello’.
+
+  5. How do I output context around the matching lines?
+
+          grep -C 2 'hello' test*.log
+
+     prints two lines of context around each matching line.
+
+  6. How do I force ‘grep’ to print the name of the file?
+
+     Append ‘/dev/null’:
+
+          grep 'eli' /etc/passwd /dev/null
+
+     gets you:
+
+          /etc/passwd:eli:x:2098:1000:Eli Smith:/home/eli:/bin/bash
+
+     Alternatively, use ‘-H’, which is a GNU extension:
+
+          grep -H 'eli' /etc/passwd
+
+  7. Why do people use strange regular expressions on ‘ps’ output?
+
+          ps -ef | grep '[c]ron'
+
+     If the pattern had been written without the square brackets, it
+     would have matched not only the ‘ps’ output line for ‘cron’, but
+     also the ‘ps’ output line for ‘grep’.  Note that on some platforms,
+     ‘ps’ limits the output to the width of the screen; ‘grep’ does not
+     have any limit on the length of a line except the available memory.
+
+  8. Why does ‘grep’ report “Binary file matches”?
+
+     If ‘grep’ listed all matching “lines” from a binary file, it would
+     probably generate output that is not useful, and it might even muck
+     up your display.  So GNU ‘grep’ suppresses output from files that
+     appear to be binary files.  To force GNU ‘grep’ to output lines
+     even from files that appear to be binary, use the ‘-a’ or
+     ‘--binary-files=text’ option.  To eliminate the “Binary file
+     matches” messages, use the ‘-I’ or ‘--binary-files=without-match’
+     option, or the ‘-s’ or ‘--no-messages’ option.
+
+  9. Why doesn’t ‘grep -lv’ print non-matching file names?
+
+     ‘grep -lv’ lists the names of all files containing one or more
+     lines that do not match.  To list the names of all files that
+     contain no matching lines, use the ‘-L’ or ‘--files-without-match’
+     option.
+
+  10. I can do “OR” with ‘|’, but what about “AND”?
+
+          grep 'paul' /etc/motd | grep 'franc,ois'
+
+     finds all lines that contain both ‘paul’ and ‘franc,ois’.
+
+  11. Why does the empty pattern match every input line?
+
+     The ‘grep’ command searches for lines that contain strings that
+     match a pattern.  Every line contains the empty string, so an empty
+     pattern causes ‘grep’ to find a match on each line.  It is not the
+     only such pattern: ‘^’, ‘$’, and many other patterns cause ‘grep’
+     to match every line.
+
+     To match empty lines, use the pattern ‘^$’.  To match blank lines,
+     use the pattern ‘^[[:blank:]]*$’.  To match no lines at all, use
+     the command ‘grep -f /dev/null’.
+
+  12. How can I search in both standard input and in files?
+
+     Use the special file name ‘-’:
+
+          cat /etc/passwd | grep 'alain' - /etc/motd
+
+  13. Why is this back-reference failing?
+
+          echo 'ba' | grep -E '(a)\1|b\1'
+
+     This outputs an error message, because the second ‘\1’ has nothing
+     to refer back to, meaning it will never match anything.
+
+  14. How can I match across lines?
+
+     Standard grep cannot do this, as it is fundamentally line-based.
+     Therefore, merely using the ‘[:space:]’ character class does not
+     match newlines in the way you might expect.
+
+     With the GNU ‘grep’ option ‘-z’ (‘--null-data’), each input and
+     output “line” is null-terminated; *note Other Options::.  Thus, you
+     can match newlines in the input, but typically if there is a match
+     the entire input is output, so this usage is often combined with
+     output-suppressing options like ‘-q’, e.g.:
+
+          printf 'foo\nbar\n' | grep -z -q 'foo[[:space:]]\+bar'
+
+     If this does not suffice, you can transform the input before giving
+     it to ‘grep’, or turn to ‘awk’, ‘sed’, ‘perl’, or many other
+     utilities that are designed to operate across lines.
+
+  15. What do ‘grep’, ‘fgrep’, and ‘egrep’ stand for?
+
+     The name ‘grep’ comes from the way line editing was done on Unix.
+     For example, ‘ed’ uses the following syntax to print a list of
+     matching lines on the screen:
+
+          global/regular expression/print
+          g/re/p
+
+     ‘fgrep’ stands for Fixed ‘grep’; ‘egrep’ stands for Extended
+     ‘grep’.
+
+
+File: grep.info,  Node: Performance,  Next: Reporting Bugs,  Prev: Usage,  Up: Top
+
+5 Performance
+*************
+
+Typically ‘grep’ is an efficient way to search text.  However, it can be
+quite slow in some cases, and it can search large files where even minor
+performance tweaking can help significantly.  Although the algorithm
+used by ‘grep’ is an implementation detail that can change from release
+to release, understanding its basic strengths and weaknesses can help
+you improve its performance.
+
+   The ‘grep’ command operates partly via a set of automata that are
+designed for efficiency, and partly via a slower matcher that takes over
+when the fast matchers run into unusual features like back-references.
+When feasible, the Boyer–Moore fast string searching algorithm is used
+to match a single fixed pattern, and the Aho–Corasick algorithm is used
+to match multiple fixed patterns.
+
+   Generally speaking ‘grep’ operates more efficiently in single-byte
+locales, since it can avoid the special processing needed for multi-byte
+characters.  If your patterns will work just as well that way, setting
+‘LC_ALL’ to a single-byte locale can help performance considerably.
+Setting ‘LC_ALL='C'’ can be particularly efficient, as ‘grep’ is tuned
+for that locale.
+
+   Outside the ‘C’ locale, case-insensitive search, and search for
+bracket expressions like ‘[a-z]’ and ‘[[=a=]b]’, can be surprisingly
+inefficient due to difficulties in fast portable access to concepts like
+multi-character collating elements.
+
+   A back-reference such as ‘\1’ can hurt performance significantly in
+some cases, since back-references cannot in general be implemented via a
+finite state automaton, and instead trigger a backtracking algorithm
+that can be quite inefficient.  For example, although the pattern
+‘^(.*)\1{14}(.*)\2{13}$’ matches only lines whose lengths can be written
+as a sum 15x + 14y for nonnegative integers x and y, the pattern matcher
+does not perform linear Diophantine analysis and instead backtracks
+through all possible matching strings, using an algorithm that is
+exponential in the worst case.
+
+   On some operating systems that support files with holes—large regions
+of zeros that are not physically present on secondary storage—‘grep’ can
+skip over the holes efficiently without needing to read the zeros.  This
+optimization is not available if the ‘-a’ (‘--binary-files=text’) option
+is used (*note File and Directory Selection::), unless the ‘-z’
+(‘--null-data’) option is also used (*note Other Options::).
+
+   For more about the algorithms used by ‘grep’ and about related string
+matching algorithms, see:
+
+   • Aho AV. Algorithms for finding patterns in strings. In: van Leeuwen
+     J. _Handbook of Theoretical Computer Science_, vol. A. New York:
+     Elsevier; 1990. p. 255–300. This surveys classic string matching
+     algorithms, some of which are used by ‘grep’.
+
+   • Aho AV, Corasick MJ. Efficient string matching: an aid to
+     bibliographic search. _CACM_. 1975;18(6):333–40.
+     <https://dx.doi.org/10.1145/360825.360855>. This introduces the
+     Aho–Corasick algorithm.
+
+   • Boyer RS, Moore JS. A fast string searching algorithm. _CACM_.
+     1977;20(10):762–72. <https://dx.doi.org/10.1145/359842.359859>.
+     This introduces the Boyer–Moore algorithm.
+
+   • Faro S, Lecroq T. The exact online string matching problem: a
+     review of the most recent results. _ACM Comput Surv_.
+     2013;45(2):13. <https://dx.doi.org/10.1145/2431211.2431212>. This
+     surveys string matching algorithms that might help improve the
+     performance of ‘grep’ in the future.
+
+
+File: grep.info,  Node: Reporting Bugs,  Next: Copying,  Prev: Performance,  Up: Top
+
+6 Reporting bugs
+****************
+
+Bug reports can be found at the GNU bug report logs for ‘grep’
+(https://debbugs.gnu.org/cgi/pkgreport.cgi?package=grep).  If you find a
+bug not listed there, please email it to <bug-grep@gnu.org> to create a
+new bug report.
+
+* Menu:
+
+* Known Bugs::
+
+
+File: grep.info,  Node: Known Bugs,  Up: Reporting Bugs
+
+6.1 Known Bugs
+==============
+
+Large repetition counts in the ‘{n,m}’ construct may cause ‘grep’ to use
+lots of memory.  In addition, certain other obscure regular expressions
+require exponential time and space, and may cause ‘grep’ to run out of
+memory.
+
+   Back-references can greatly slow down matching, as they can generate
+exponentially many matching possibilities that can consume both time and
+memory to explore.  Also, the POSIX specification for back-references is
+at times unclear.  Furthermore, many regular expression implementations
+have back-reference bugs that can cause programs to return incorrect
+answers or even crash, and fixing these bugs has often been
+low-priority: for example, as of 2021 the GNU C library bug database
+(https://sourceware.org/bugzilla/) contained back-reference bugs 52,
+10844, 11053, 24269 and 25322, with little sign of forthcoming fixes.
+Luckily, back-references are rarely useful and it should be little
+trouble to avoid them in practical applications.
+
+
+File: grep.info,  Node: Copying,  Next: Index,  Prev: Reporting Bugs,  Up: Top
+
+7 Copying
+*********
+
+GNU ‘grep’ is licensed under the GNU GPL, which makes it “free
+software”.
+
+   The “free” in “free software” refers to liberty, not price.  As some
+GNU project advocates like to point out, think of “free speech” rather
+than “free beer”.  In short, you have the right (freedom) to run and
+change ‘grep’ and distribute it to other people, and—if you want—charge
+money for doing either.  The important restriction is that you have to
+grant your recipients the same rights and impose the same restrictions.
+
+   This general method of licensing software is sometimes called “open
+source”.  The GNU project prefers the term “free software” for reasons
+outlined at
+<https://www.gnu.org/philosophy/open-source-misses-the-point.html>.
+
+   This manual is free documentation in the same sense.  The
+documentation license is included below.  The license for the program is
+available with the source code, or at
+<https://www.gnu.org/licenses/gpl.html>.
+
+* Menu:
+
+* GNU Free Documentation License::
+
+
+File: grep.info,  Node: GNU Free Documentation License,  Up: Copying
+
+7.1 GNU Free Documentation License
+==================================
+
+                     Version 1.3, 3 November 2008
+
+     Copyright © 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
+     <https://fsf.org/>
+
+     Everyone is permitted to copy and distribute verbatim copies
+     of this license document, but changing it is not allowed.
+
+  0. PREAMBLE
+
+     The purpose of this License is to make a manual, textbook, or other
+     functional and useful document “free” in the sense of freedom: to
+     assure everyone the effective freedom to copy and redistribute it,
+     with or without modifying it, either commercially or
+     noncommercially.  Secondarily, this License preserves for the
+     author and publisher a way to get credit for their work, while not
+     being considered responsible for modifications made by others.
+
+     This License is a kind of “copyleft”, which means that derivative
+     works of the document must themselves be free in the same sense.
+     It complements the GNU General Public License, which is a copyleft
+     license designed for free software.
+
+     We have designed this License in order to use it for manuals for
+     free software, because free software needs free documentation: a
+     free program should come with manuals providing the same freedoms
+     that the software does.  But this License is not limited to
+     software manuals; it can be used for any textual work, regardless
+     of subject matter or whether it is published as a printed book.  We
+     recommend this License principally for works whose purpose is
+     instruction or reference.
+
+  1. APPLICABILITY AND DEFINITIONS
+
+     This License applies to any manual or other work, in any medium,
+     that contains a notice placed by the copyright holder saying it can
+     be distributed under the terms of this License.  Such a notice
+     grants a world-wide, royalty-free license, unlimited in duration,
+     to use that work under the conditions stated herein.  The
+     “Document”, below, refers to any such manual or work.  Any member
+     of the public is a licensee, and is addressed as “you”.  You accept
+     the license if you copy, modify or distribute the work in a way
+     requiring permission under copyright law.
+
+     A “Modified Version” of the Document means any work containing the
+     Document or a portion of it, either copied verbatim, or with
+     modifications and/or translated into another language.
+
+     A “Secondary Section” is a named appendix or a front-matter section
+     of the Document that deals exclusively with the relationship of the
+     publishers or authors of the Document to the Document’s overall
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+     regarding them.
+
+     The “Invariant Sections” are certain Secondary Sections whose
+     titles are designated, as being those of Invariant Sections, in the
+     notice that says that the Document is released under this License.
+     If a section does not fit the above definition of Secondary then it
+     is not allowed to be designated as Invariant.  The Document may
+     contain zero Invariant Sections.  If the Document does not identify
+     any Invariant Sections then there are none.
+
+     The “Cover Texts” are certain short passages of text that are
+     listed, as Front-Cover Texts or Back-Cover Texts, in the notice
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+     Front-Cover Text may be at most 5 words, and a Back-Cover Text may
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+
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+     Examples of suitable formats for Transparent copies include plain
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+
+     The “Title Page” means, for a printed book, the title page itself,
+     plus such following pages as are needed to hold, legibly, the
+     material this License requires to appear in the title page.  For
+     works in formats which do not have any title page as such, “Title
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+
+     The “publisher” means any person or entity that distributes copies
+     of the Document to the public.
+
+     A section “Entitled XYZ” means a named subunit of the Document
+     whose title either is precisely XYZ or contains XYZ in parentheses
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+     stands for a specific section name mentioned below, such as
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+     To “Preserve the Title” of such a section when you modify the
+     Document means that it remains a section “Entitled XYZ” according
+     to this definition.
+
+     The Document may include Warranty Disclaimers next to the notice
+     which states that this License applies to the Document.  These
+     Warranty Disclaimers are considered to be included by reference in
+     this License, but only as regards disclaiming warranties: any other
+     implication that these Warranty Disclaimers may have is void and
+     has no effect on the meaning of this License.
+
+  2. VERBATIM COPYING
+
+     You may copy and distribute the Document in any medium, either
+     commercially or noncommercially, provided that this License, the
+     copyright notices, and the license notice saying this License
+     applies to the Document are reproduced in all copies, and that you
+     add no other conditions whatsoever to those of this License.  You
+     may not use technical measures to obstruct or control the reading
+     or further copying of the copies you make or distribute.  However,
+     you may accept compensation in exchange for copies.  If you
+     distribute a large enough number of copies you must also follow the
+     conditions in section 3.
+
+     You may also lend copies, under the same conditions stated above,
+     and you may publicly display copies.
+
+  3. COPYING IN QUANTITY
+
+     If you publish printed copies (or copies in media that commonly
+     have printed covers) of the Document, numbering more than 100, and
+     the Document’s license notice requires Cover Texts, you must
+     enclose the copies in covers that carry, clearly and legibly, all
+     these Cover Texts: Front-Cover Texts on the front cover, and
+     Back-Cover Texts on the back cover.  Both covers must also clearly
+     and legibly identify you as the publisher of these copies.  The
+     front cover must present the full title with all words of the title
+     equally prominent and visible.  You may add other material on the
+     covers in addition.  Copying with changes limited to the covers, as
+     long as they preserve the title of the Document and satisfy these
+     conditions, can be treated as verbatim copying in other respects.
+
+     If the required texts for either cover are too voluminous to fit
+     legibly, you should put the first ones listed (as many as fit
+     reasonably) on the actual cover, and continue the rest onto
+     adjacent pages.
+
+     If you publish or distribute Opaque copies of the Document
+     numbering more than 100, you must either include a machine-readable
+     Transparent copy along with each Opaque copy, or state in or with
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+     year after the last time you distribute an Opaque copy (directly or
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+
+     It is requested, but not required, that you contact the authors of
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+     to give them a chance to provide you with an updated version of the
+     Document.
+
+  4. MODIFICATIONS
+
+     You may copy and distribute a Modified Version of the Document
+     under the conditions of sections 2 and 3 above, provided that you
+     release the Modified Version under precisely this License, with the
+     Modified Version filling the role of the Document, thus licensing
+     distribution and modification of the Modified Version to whoever
+     possesses a copy of it.  In addition, you must do these things in
+     the Modified Version:
+
+       A. Use in the Title Page (and on the covers, if any) a title
+          distinct from that of the Document, and from those of previous
+          versions (which should, if there were any, be listed in the
+          History section of the Document).  You may use the same title
+          as a previous version if the original publisher of that
+          version gives permission.
+
+       B. List on the Title Page, as authors, one or more persons or
+          entities responsible for authorship of the modifications in
+          the Modified Version, together with at least five of the
+          principal authors of the Document (all of its principal
+          authors, if it has fewer than five), unless they release you
+          from this requirement.
+
+       C. State on the Title page the name of the publisher of the
+          Modified Version, as the publisher.
+
+       D. Preserve all the copyright notices of the Document.
+
+       E. Add an appropriate copyright notice for your modifications
+          adjacent to the other copyright notices.
+
+       F. Include, immediately after the copyright notices, a license
+          notice giving the public permission to use the Modified
+          Version under the terms of this License, in the form shown in
+          the Addendum below.
+
+       G. Preserve in that license notice the full lists of Invariant
+          Sections and required Cover Texts given in the Document’s
+          license notice.
+
+       H. Include an unaltered copy of this License.
+
+       I. Preserve the section Entitled “History”, Preserve its Title,
+          and add to it an item stating at least the title, year, new
+          authors, and publisher of the Modified Version as given on the
+          Title Page.  If there is no section Entitled “History” in the
+          Document, create one stating the title, year, authors, and
+          publisher of the Document as given on its Title Page, then add
+          an item describing the Modified Version as stated in the
+          previous sentence.
+
+       J. Preserve the network location, if any, given in the Document
+          for public access to a Transparent copy of the Document, and
+          likewise the network locations given in the Document for
+          previous versions it was based on.  These may be placed in the
+          “History” section.  You may omit a network location for a work
+          that was published at least four years before the Document
+          itself, or if the original publisher of the version it refers
+          to gives permission.
+
+       K. For any section Entitled “Acknowledgements” or “Dedications”,
+          Preserve the Title of the section, and preserve in the section
+          all the substance and tone of each of the contributor
+          acknowledgements and/or dedications given therein.
+
+       L. Preserve all the Invariant Sections of the Document, unaltered
+          in their text and in their titles.  Section numbers or the
+          equivalent are not considered part of the section titles.
+
+       M. Delete any section Entitled “Endorsements”.  Such a section
+          may not be included in the Modified Version.
+
+       N. Do not retitle any existing section to be Entitled
+          “Endorsements” or to conflict in title with any Invariant
+          Section.
+
+       O. Preserve any Warranty Disclaimers.
+
+     If the Modified Version includes new front-matter sections or
+     appendices that qualify as Secondary Sections and contain no
+     material copied from the Document, you may at your option designate
+     some or all of these sections as invariant.  To do this, add their
+     titles to the list of Invariant Sections in the Modified Version’s
+     license notice.  These titles must be distinct from any other
+     section titles.
+
+     You may add a section Entitled “Endorsements”, provided it contains
+     nothing but endorsements of your Modified Version by various
+     parties—for example, statements of peer review or that the text has
+     been approved by an organization as the authoritative definition of
+     a standard.
+
+     You may add a passage of up to five words as a Front-Cover Text,
+     and a passage of up to 25 words as a Back-Cover Text, to the end of
+     the list of Cover Texts in the Modified Version.  Only one passage
+     of Front-Cover Text and one of Back-Cover Text may be added by (or
+     through arrangements made by) any one entity.  If the Document
+     already includes a cover text for the same cover, previously added
+     by you or by arrangement made by the same entity you are acting on
+     behalf of, you may not add another; but you may replace the old
+     one, on explicit permission from the previous publisher that added
+     the old one.
+
+     The author(s) and publisher(s) of the Document do not by this
+     License give permission to use their names for publicity for or to
+     assert or imply endorsement of any Modified Version.
+
+  5. COMBINING DOCUMENTS
+
+     You may combine the Document with other documents released under
+     this License, under the terms defined in section 4 above for
+     modified versions, provided that you include in the combination all
+     of the Invariant Sections of all of the original documents,
+     unmodified, and list them all as Invariant Sections of your
+     combined work in its license notice, and that you preserve all
+     their Warranty Disclaimers.
+
+     The combined work need only contain one copy of this License, and
+     multiple identical Invariant Sections may be replaced with a single
+     copy.  If there are multiple Invariant Sections with the same name
+     but different contents, make the title of each such section unique
+     by adding at the end of it, in parentheses, the name of the
+     original author or publisher of that section if known, or else a
+     unique number.  Make the same adjustment to the section titles in
+     the list of Invariant Sections in the license notice of the
+     combined work.
+
+     In the combination, you must combine any sections Entitled
+     “History” in the various original documents, forming one section
+     Entitled “History”; likewise combine any sections Entitled
+     “Acknowledgements”, and any sections Entitled “Dedications”.  You
+     must delete all sections Entitled “Endorsements.”
+
+  6. COLLECTIONS OF DOCUMENTS
+
+     You may make a collection consisting of the Document and other
+     documents released under this License, and replace the individual
+     copies of this License in the various documents with a single copy
+     that is included in the collection, provided that you follow the
+     rules of this License for verbatim copying of each of the documents
+     in all other respects.
+
+     You may extract a single document from such a collection, and
+     distribute it individually under this License, provided you insert
+     a copy of this License into the extracted document, and follow this
+     License in all other respects regarding verbatim copying of that
+     document.
+
+  7. AGGREGATION WITH INDEPENDENT WORKS
+
+     A compilation of the Document or its derivatives with other
+     separate and independent documents or works, in or on a volume of a
+     storage or distribution medium, is called an “aggregate” if the
+     copyright resulting from the compilation is not used to limit the
+     legal rights of the compilation’s users beyond what the individual
+     works permit.  When the Document is included in an aggregate, this
+     License does not apply to the other works in the aggregate which
+     are not themselves derivative works of the Document.
+
+     If the Cover Text requirement of section 3 is applicable to these
+     copies of the Document, then if the Document is less than one half
+     of the entire aggregate, the Document’s Cover Texts may be placed
+     on covers that bracket the Document within the aggregate, or the
+     electronic equivalent of covers if the Document is in electronic
+     form.  Otherwise they must appear on printed covers that bracket
+     the whole aggregate.
+
+  8. TRANSLATION
+
+     Translation is considered a kind of modification, so you may
+     distribute translations of the Document under the terms of section
+     4.  Replacing Invariant Sections with translations requires special
+     permission from their copyright holders, but you may include
+     translations of some or all Invariant Sections in addition to the
+     original versions of these Invariant Sections.  You may include a
+     translation of this License, and all the license notices in the
+     Document, and any Warranty Disclaimers, provided that you also
+     include the original English version of this License and the
+     original versions of those notices and disclaimers.  In case of a
+     disagreement between the translation and the original version of
+     this License or a notice or disclaimer, the original version will
+     prevail.
+
+     If a section in the Document is Entitled “Acknowledgements”,
+     “Dedications”, or “History”, the requirement (section 4) to
+     Preserve its Title (section 1) will typically require changing the
+     actual title.
+
+  9. TERMINATION
+
+     You may not copy, modify, sublicense, or distribute the Document
+     except as expressly provided under this License.  Any attempt
+     otherwise to copy, modify, sublicense, or distribute it is void,
+     and will automatically terminate your rights under this License.
+
+     However, if you cease all violation of this License, then your
+     license from a particular copyright holder is reinstated (a)
+     provisionally, unless and until the copyright holder explicitly and
+     finally terminates your license, and (b) permanently, if the
+     copyright holder fails to notify you of the violation by some
+     reasonable means prior to 60 days after the cessation.
+
+     Moreover, your license from a particular copyright holder is
+     reinstated permanently if the copyright holder notifies you of the
+     violation by some reasonable means, this is the first time you have
+     received notice of violation of this License (for any work) from
+     that copyright holder, and you cure the violation prior to 30 days
+     after your receipt of the notice.
+
+     Termination of your rights under this section does not terminate
+     the licenses of parties who have received copies or rights from you
+     under this License.  If your rights have been terminated and not
+     permanently reinstated, receipt of a copy of some or all of the
+     same material does not give you any rights to use it.
+
+  10. FUTURE REVISIONS OF THIS LICENSE
+
+     The Free Software Foundation may publish new, revised versions of
+     the GNU Free Documentation License from time to time.  Such new
+     versions will be similar in spirit to the present version, but may
+     differ in detail to address new problems or concerns.  See
+     <https://www.gnu.org/licenses/>.
+
+     Each version of the License is given a distinguishing version
+     number.  If the Document specifies that a particular numbered
+     version of this License “or any later version” applies to it, you
+     have the option of following the terms and conditions either of
+     that specified version or of any later version that has been
+     published (not as a draft) by the Free Software Foundation.  If the
+     Document does not specify a version number of this License, you may
+     choose any version ever published (not as a draft) by the Free
+     Software Foundation.  If the Document specifies that a proxy can
+     decide which future versions of this License can be used, that
+     proxy’s public statement of acceptance of a version permanently
+     authorizes you to choose that version for the Document.
+
+  11. RELICENSING
+
+     “Massive Multiauthor Collaboration Site” (or “MMC Site”) means any
+     World Wide Web server that publishes copyrightable works and also
+     provides prominent facilities for anybody to edit those works.  A
+     public wiki that anybody can edit is an example of such a server.
+     A “Massive Multiauthor Collaboration” (or “MMC”) contained in the
+     site means any set of copyrightable works thus published on the MMC
+     site.
+
+     “CC-BY-SA” means the Creative Commons Attribution-Share Alike 3.0
+     license published by Creative Commons Corporation, a not-for-profit
+     corporation with a principal place of business in San Francisco,
+     California, as well as future copyleft versions of that license
+     published by that same organization.
+
+     “Incorporate” means to publish or republish a Document, in whole or
+     in part, as part of another Document.
+
+     An MMC is “eligible for relicensing” if it is licensed under this
+     License, and if all works that were first published under this
+     License somewhere other than this MMC, and subsequently
+     incorporated in whole or in part into the MMC, (1) had no cover
+     texts or invariant sections, and (2) were thus incorporated prior
+     to November 1, 2008.
+
+     The operator of an MMC Site may republish an MMC contained in the
+     site under CC-BY-SA on the same site at any time before August 1,
+     2009, provided the MMC is eligible for relicensing.
+
+ADDENDUM: How to use this License for your documents
+====================================================
+
+To use this License in a document you have written, include a copy of
+the License in the document and put the following copyright and license
+notices just after the title page:
+
+       Copyright (C)  YEAR  YOUR NAME.
+       Permission is granted to copy, distribute and/or modify this document
+       under the terms of the GNU Free Documentation License, Version 1.3
+       or any later version published by the Free Software Foundation;
+       with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
+       Texts.  A copy of the license is included in the section entitled ``GNU
+       Free Documentation License''.
+
+   If you have Invariant Sections, Front-Cover Texts and Back-Cover
+Texts, replace the “with...Texts.” line with this:
+
+         with the Invariant Sections being LIST THEIR TITLES, with
+         the Front-Cover Texts being LIST, and with the Back-Cover Texts
+         being LIST.
+
+   If you have Invariant Sections without Cover Texts, or some other
+combination of the three, merge those two alternatives to suit the
+situation.
+
+   If your document contains nontrivial examples of program code, we
+recommend releasing these examples in parallel under your choice of free
+software license, such as the GNU General Public License, to permit
+their use in free software.
+
+
+File: grep.info,  Node: Index,  Prev: Copying,  Up: Top
+
+Index
+*****
+
+
+* Menu:
+
+* *:                                     Fundamental Structure.
+                                                              (line  22)
+* +:                                     Fundamental Structure.
+                                                              (line  25)
+* --:                                    Other Options.       (line   7)
+* --after-context:                       Context Line Control.
+                                                              (line  15)
+* --basic-regexp:                        grep Programs.       (line  15)
+* --before-context:                      Context Line Control.
+                                                              (line  19)
+* --binary:                              Other Options.       (line  22)
+* --binary-files:                        File and Directory Selection.
+                                                              (line  12)
+* --byte-offset:                         Output Line Prefix Control.
+                                                              (line  12)
+* --color:                               General Output Control.
+                                                              (line  14)
+* --colour:                              General Output Control.
+                                                              (line  14)
+* --context:                             Context Line Control.
+                                                              (line  24)
+* --count:                               General Output Control.
+                                                              (line   8)
+* --dereference-recursive:               File and Directory Selection.
+                                                              (line 113)
+* --devices:                             File and Directory Selection.
+                                                              (line  51)
+* --directories:                         File and Directory Selection.
+                                                              (line  62)
+* --exclude:                             File and Directory Selection.
+                                                              (line  73)
+* --exclude-dir:                         File and Directory Selection.
+                                                              (line  87)
+* --exclude-from:                        File and Directory Selection.
+                                                              (line  83)
+* --extended-regexp:                     grep Programs.       (line  20)
+* --file:                                Matching Control.    (line  17)
+* --files-with-matches:                  General Output Control.
+                                                              (line  34)
+* --files-without-match:                 General Output Control.
+                                                              (line  29)
+* --fixed-strings:                       grep Programs.       (line  25)
+* --group-separator:                     Context Line Control.
+                                                              (line  27)
+* --group-separator <1>:                 Context Line Control.
+                                                              (line  31)
+* --help:                                Generic Program Information.
+                                                              (line   7)
+* --ignore-case:                         Matching Control.    (line  26)
+* --include:                             File and Directory Selection.
+                                                              (line  97)
+* --initial-tab:                         Output Line Prefix Control.
+                                                              (line  41)
+* --invert-match:                        Matching Control.    (line  51)
+* --label:                               Output Line Prefix Control.
+                                                              (line  28)
+* --line-buffered:                       Other Options.       (line  13)
+* --line-number:                         Output Line Prefix Control.
+                                                              (line  36)
+* --line-regexp:                         Matching Control.    (line  73)
+* --max-count:                           General Output Control.
+                                                              (line  40)
+* --no-filename:                         Output Line Prefix Control.
+                                                              (line  23)
+* --no-ignore-case:                      Matching Control.    (line  44)
+* --no-messages:                         General Output Control.
+                                                              (line  85)
+* --null:                                Output Line Prefix Control.
+                                                              (line  50)
+* --null-data:                           Other Options.       (line  43)
+* --only-matching:                       General Output Control.
+                                                              (line  70)
+* --perl-regexp:                         grep Programs.       (line  30)
+* --quiet:                               General Output Control.
+                                                              (line  78)
+* --recursive:                           File and Directory Selection.
+                                                              (line 105)
+* --regexp=PATTERNS:                     Matching Control.    (line   8)
+* --silent:                              General Output Control.
+                                                              (line  78)
+* --text:                                File and Directory Selection.
+                                                              (line   8)
+* --version:                             Generic Program Information.
+                                                              (line  12)
+* --with-filename:                       Output Line Prefix Control.
+                                                              (line  18)
+* --word-regexp:                         Matching Control.    (line  56)
+* -A:                                    Context Line Control.
+                                                              (line  15)
+* -a:                                    File and Directory Selection.
+                                                              (line   8)
+* -b:                                    Output Line Prefix Control.
+                                                              (line  12)
+* -B:                                    Context Line Control.
+                                                              (line  19)
+* -c:                                    General Output Control.
+                                                              (line   8)
+* -C:                                    Context Line Control.
+                                                              (line  24)
+* -D:                                    File and Directory Selection.
+                                                              (line  51)
+* -d:                                    File and Directory Selection.
+                                                              (line  62)
+* -e:                                    Matching Control.    (line   8)
+* -E:                                    grep Programs.       (line  20)
+* -f:                                    Matching Control.    (line  17)
+* -F:                                    grep Programs.       (line  25)
+* -G:                                    grep Programs.       (line  15)
+* -H:                                    Output Line Prefix Control.
+                                                              (line  18)
+* -h:                                    Output Line Prefix Control.
+                                                              (line  23)
+* -i:                                    Matching Control.    (line  26)
+* -L:                                    General Output Control.
+                                                              (line  29)
+* -l:                                    General Output Control.
+                                                              (line  34)
+* -m:                                    General Output Control.
+                                                              (line  40)
+* -n:                                    Output Line Prefix Control.
+                                                              (line  36)
+* -NUM:                                  Context Line Control.
+                                                              (line  24)
+* -o:                                    General Output Control.
+                                                              (line  70)
+* -P:                                    grep Programs.       (line  30)
+* -q:                                    General Output Control.
+                                                              (line  78)
+* -r:                                    File and Directory Selection.
+                                                              (line 105)
+* -R:                                    File and Directory Selection.
+                                                              (line 113)
+* -s:                                    General Output Control.
+                                                              (line  85)
+* -T:                                    Output Line Prefix Control.
+                                                              (line  41)
+* -U:                                    Other Options.       (line  22)
+* -V:                                    Generic Program Information.
+                                                              (line  12)
+* -v:                                    Matching Control.    (line  51)
+* -w:                                    Matching Control.    (line  56)
+* -x:                                    Matching Control.    (line  73)
+* -y:                                    Matching Control.    (line  26)
+* -Z:                                    Output Line Prefix Control.
+                                                              (line  50)
+* -z:                                    Other Options.       (line  43)
+* .:                                     Fundamental Structure.
+                                                              (line  11)
+* ?:                                     Fundamental Structure.
+                                                              (line  19)
+* _N_GNU_nonoption_argv_flags_ environment variable: Environment Variables.
+                                                              (line 178)
+* {,M}:                                  Fundamental Structure.
+                                                              (line  34)
+* {N,M}:                                 Fundamental Structure.
+                                                              (line  38)
+* {N,}:                                  Fundamental Structure.
+                                                              (line  31)
+* {N}:                                   Fundamental Structure.
+                                                              (line  28)
+* after context:                         Context Line Control.
+                                                              (line  15)
+* alnum character class:                 Character Classes and Bracket Expressions.
+                                                              (line  31)
+* alpha character class:                 Character Classes and Bracket Expressions.
+                                                              (line  36)
+* alphabetic characters:                 Character Classes and Bracket Expressions.
+                                                              (line  36)
+* alphanumeric characters:               Character Classes and Bracket Expressions.
+                                                              (line  31)
+* anchoring:                             Anchoring.           (line   6)
+* asterisk:                              Fundamental Structure.
+                                                              (line  22)
+* back-reference:                        Back-references and Subexpressions.
+                                                              (line   6)
+* back-references:                       Performance.         (line  32)
+* backslash:                             The Backslash Character and Special Expressions.
+                                                              (line   6)
+* basic regular expressions:             Basic vs Extended.   (line   6)
+* before context:                        Context Line Control.
+                                                              (line  19)
+* binary files:                          File and Directory Selection.
+                                                              (line   8)
+* binary files <1>:                      File and Directory Selection.
+                                                              (line  12)
+* binary I/O:                            Other Options.       (line  22)
+* blank character class:                 Character Classes and Bracket Expressions.
+                                                              (line  41)
+* blank characters:                      Character Classes and Bracket Expressions.
+                                                              (line  41)
+* bn GREP_COLORS capability:             Environment Variables.
+                                                              (line 121)
+* braces, first argument omitted:        Fundamental Structure.
+                                                              (line  34)
+* braces, one argument:                  Fundamental Structure.
+                                                              (line  28)
+* braces, second argument omitted:       Fundamental Structure.
+                                                              (line  31)
+* braces, two arguments:                 Fundamental Structure.
+                                                              (line  38)
+* bracket expression:                    Character Classes and Bracket Expressions.
+                                                              (line   6)
+* Bugs, known:                           Known Bugs.          (line   6)
+* bugs, reporting:                       Reporting Bugs.      (line   6)
+* byte offset:                           Output Line Prefix Control.
+                                                              (line  12)
+* case insensitive search:               Matching Control.    (line  26)
+* case insensitive search <1>:           Performance.         (line  27)
+* changing name of standard input:       Output Line Prefix Control.
+                                                              (line  28)
+* character class:                       Character Classes and Bracket Expressions.
+                                                              (line   6)
+* character classes:                     Character Classes and Bracket Expressions.
+                                                              (line  30)
+* character encoding:                    Character Encoding.  (line   6)
+* character type:                        Environment Variables.
+                                                              (line 148)
+* classes of characters:                 Character Classes and Bracket Expressions.
+                                                              (line  30)
+* cntrl character class:                 Character Classes and Bracket Expressions.
+                                                              (line  44)
+* context lines:                         General Output Control.
+                                                              (line  62)
+* context lines <1>:                     Context Line Control.
+                                                              (line   6)
+* context lines <2>:                     Context Line Control.
+                                                              (line  24)
+* context lines, after match:            Context Line Control.
+                                                              (line  15)
+* context lines, before match:           Context Line Control.
+                                                              (line  19)
+* control characters:                    Character Classes and Bracket Expressions.
+                                                              (line  44)
+* copying:                               Copying.             (line   6)
+* counting lines:                        General Output Control.
+                                                              (line   8)
+* cx GREP_COLORS capability:             Environment Variables.
+                                                              (line  72)
+* device search:                         File and Directory Selection.
+                                                              (line  51)
+* digit character class:                 Character Classes and Bracket Expressions.
+                                                              (line  49)
+* digit characters:                      Character Classes and Bracket Expressions.
+                                                              (line  49)
+* directory search:                      File and Directory Selection.
+                                                              (line  62)
+* dot:                                   Fundamental Structure.
+                                                              (line  11)
+* encoding error:                        Environment Variables.
+                                                              (line 155)
+* environment variables:                 Environment Variables.
+                                                              (line  44)
+* exclude directories:                   File and Directory Selection.
+                                                              (line  87)
+* exclude files:                         File and Directory Selection.
+                                                              (line  73)
+* exclude files <1>:                     File and Directory Selection.
+                                                              (line  83)
+* exit status:                           Exit Status.         (line   6)
+* FAQ about grep usage:                  Usage.               (line  32)
+* files which don’t match:               General Output Control.
+                                                              (line  29)
+* fn GREP_COLORS capability:             Environment Variables.
+                                                              (line 111)
+* fn GREP_COLORS capability <1>:         Environment Variables.
+                                                              (line 126)
+* graph character class:                 Character Classes and Bracket Expressions.
+                                                              (line  52)
+* graphic characters:                    Character Classes and Bracket Expressions.
+                                                              (line  52)
+* grep programs:                         grep Programs.       (line   6)
+* GREP_COLOR environment variable:       Environment Variables.
+                                                              (line  45)
+* GREP_COLORS environment variable:      Environment Variables.
+                                                              (line  56)
+* group separator:                       Context Line Control.
+                                                              (line  27)
+* group separator <1>:                   Context Line Control.
+                                                              (line  31)
+* hexadecimal digits:                    Character Classes and Bracket Expressions.
+                                                              (line  76)
+* highlight markers:                     Environment Variables.
+                                                              (line  45)
+* highlight markers <1>:                 Environment Variables.
+                                                              (line  56)
+* highlight, color, colour:              General Output Control.
+                                                              (line  14)
+* holes in files:                        Performance.         (line  42)
+* include files:                         File and Directory Selection.
+                                                              (line  97)
+* interval expressions:                  Fundamental Structure.
+                                                              (line  14)
+* interval expressions <1>:              Basic vs Extended.   (line  27)
+* invert matching:                       Matching Control.    (line  51)
+* LANG environment variable:             Environment Variables.
+                                                              (line   9)
+* LANG environment variable <1>:         Environment Variables.
+                                                              (line 148)
+* LANG environment variable <2>:         Environment Variables.
+                                                              (line 155)
+* LANG environment variable <3>:         Environment Variables.
+                                                              (line 164)
+* LANGUAGE environment variable:         Environment Variables.
+                                                              (line   9)
+* LANGUAGE environment variable <1>:     Environment Variables.
+                                                              (line 164)
+* language of messages:                  Environment Variables.
+                                                              (line 164)
+* LC_ALL environment variable:           Environment Variables.
+                                                              (line   9)
+* LC_ALL environment variable <1>:       Environment Variables.
+                                                              (line 148)
+* LC_ALL environment variable <2>:       Environment Variables.
+                                                              (line 155)
+* LC_ALL environment variable <3>:       Environment Variables.
+                                                              (line 164)
+* LC_COLLATE environment variable:       Environment Variables.
+                                                              (line 148)
+* LC_CTYPE environment variable:         Environment Variables.
+                                                              (line 155)
+* LC_MESSAGES environment variable:      Environment Variables.
+                                                              (line   9)
+* LC_MESSAGES environment variable <1>:  Environment Variables.
+                                                              (line 164)
+* line buffering:                        Other Options.       (line  13)
+* line numbering:                        Output Line Prefix Control.
+                                                              (line  36)
+* ln GREP_COLORS capability:             Environment Variables.
+                                                              (line 116)
+* locales:                               Performance.         (line  20)
+* lower character class:                 Character Classes and Bracket Expressions.
+                                                              (line  55)
+* lower-case letters:                    Character Classes and Bracket Expressions.
+                                                              (line  55)
+* match expression at most M times:      Fundamental Structure.
+                                                              (line  34)
+* match expression at most once:         Fundamental Structure.
+                                                              (line  19)
+* match expression from N to M times:    Fundamental Structure.
+                                                              (line  38)
+* match expression N or more times:      Fundamental Structure.
+                                                              (line  31)
+* match expression N times:              Fundamental Structure.
+                                                              (line  28)
+* match expression one or more times:    Fundamental Structure.
+                                                              (line  25)
+* match expression zero or more times:   Fundamental Structure.
+                                                              (line  22)
+* match the whole line:                  Matching Control.    (line  73)
+* matching basic regular expressions:    grep Programs.       (line  15)
+* matching extended regular expressions: grep Programs.       (line  20)
+* matching fixed strings:                grep Programs.       (line  25)
+* matching Perl-compatible regular expressions: grep Programs.
+                                                              (line  30)
+* matching whole words:                  Matching Control.    (line  56)
+* max-count:                             General Output Control.
+                                                              (line  40)
+* mc GREP_COLORS capability:             Environment Variables.
+                                                              (line 103)
+* message language:                      Environment Variables.
+                                                              (line 164)
+* ms GREP_COLORS capability:             Environment Variables.
+                                                              (line  95)
+* MS-Windows binary I/O:                 Other Options.       (line  22)
+* mt GREP_COLORS capability:             Environment Variables.
+                                                              (line  87)
+* names of matching files:               General Output Control.
+                                                              (line  34)
+* national language support:             Environment Variables.
+                                                              (line 148)
+* national language support <1>:         Environment Variables.
+                                                              (line 164)
+* ne GREP_COLORS capability:             Environment Variables.
+                                                              (line 133)
+* NLS:                                   Environment Variables.
+                                                              (line 148)
+* no filename prefix:                    Output Line Prefix Control.
+                                                              (line  23)
+* non-ASCII matching:                    Matching Non-ASCII.  (line   6)
+* non-printable matching:                Matching Non-ASCII.  (line   6)
+* null character:                        Environment Variables.
+                                                              (line 155)
+* numeric characters:                    Character Classes and Bracket Expressions.
+                                                              (line  49)
+* only matching:                         General Output Control.
+                                                              (line  70)
+* option delimiter:                      Other Options.       (line   7)
+* ordinary characters:                   Fundamental Structure.
+                                                              (line   6)
+* patterns from file:                    Matching Control.    (line  17)
+* patterns option:                       Matching Control.    (line   8)
+* performance:                           Performance.         (line   6)
+* period:                                Fundamental Structure.
+                                                              (line  11)
+* plus sign:                             Fundamental Structure.
+                                                              (line  25)
+* POSIXLY_CORRECT environment variable:  Environment Variables.
+                                                              (line 169)
+* print character class:                 Character Classes and Bracket Expressions.
+                                                              (line  59)
+* print non-matching lines:              Matching Control.    (line  51)
+* printable characters:                  Character Classes and Bracket Expressions.
+                                                              (line  59)
+* punct character class:                 Character Classes and Bracket Expressions.
+                                                              (line  62)
+* punctuation characters:                Character Classes and Bracket Expressions.
+                                                              (line  62)
+* question mark:                         Fundamental Structure.
+                                                              (line  19)
+* quiet, silent:                         General Output Control.
+                                                              (line  78)
+* range expression:                      Character Classes and Bracket Expressions.
+                                                              (line  14)
+* recursive search:                      File and Directory Selection.
+                                                              (line 105)
+* recursive search <1>:                  File and Directory Selection.
+                                                              (line 113)
+* regular expressions:                   Regular Expressions. (line   6)
+* return status:                         Exit Status.         (line   6)
+* rv GREP_COLORS capability:             Environment Variables.
+                                                              (line  81)
+* searching directory trees:             File and Directory Selection.
+                                                              (line  73)
+* searching directory trees <1>:         File and Directory Selection.
+                                                              (line  83)
+* searching directory trees <2>:         File and Directory Selection.
+                                                              (line  97)
+* searching directory trees <3>:         File and Directory Selection.
+                                                              (line 105)
+* searching directory trees <4>:         File and Directory Selection.
+                                                              (line 113)
+* searching for patterns:                Introduction.        (line   6)
+* sl GREP_COLORS capability:             Environment Variables.
+                                                              (line  64)
+* space character class:                 Character Classes and Bracket Expressions.
+                                                              (line  67)
+* space characters:                      Character Classes and Bracket Expressions.
+                                                              (line  67)
+* special characters:                    Fundamental Structure.
+                                                              (line   6)
+* subexpression:                         Back-references and Subexpressions.
+                                                              (line   6)
+* suppress binary data:                  File and Directory Selection.
+                                                              (line   8)
+* suppress error messages:               General Output Control.
+                                                              (line  85)
+* symbolic links:                        File and Directory Selection.
+                                                              (line  62)
+* symbolic links <1>:                    File and Directory Selection.
+                                                              (line 105)
+* symbolic links <2>:                    File and Directory Selection.
+                                                              (line 113)
+* tab-aligned content lines:             Output Line Prefix Control.
+                                                              (line  41)
+* translation of message language:       Environment Variables.
+                                                              (line 164)
+* upper character class:                 Character Classes and Bracket Expressions.
+                                                              (line  72)
+* upper-case letters:                    Character Classes and Bracket Expressions.
+                                                              (line  72)
+* usage summary, printing:               Generic Program Information.
+                                                              (line   7)
+* usage, examples:                       Usage.               (line   6)
+* using grep, Q&A:                       Usage.               (line  32)
+* variants of grep:                      grep Programs.       (line   6)
+* version, printing:                     Generic Program Information.
+                                                              (line  12)
+* whitespace characters:                 Character Classes and Bracket Expressions.
+                                                              (line  67)
+* with filename prefix:                  Output Line Prefix Control.
+                                                              (line  18)
+* xdigit character class:                Character Classes and Bracket Expressions.
+                                                              (line  76)
+* xdigit class:                          Character Classes and Bracket Expressions.
+                                                              (line  76)
+* zero-terminated file names:            Output Line Prefix Control.
+                                                              (line  50)
+* zero-terminated lines:                 Other Options.       (line  43)
+
+
+
+Tag Table:
+Node: Top773
+Node: Introduction1965
+Node: Invoking2708
+Node: Command-line Options3551
+Node: Generic Program Information4434
+Node: Matching Control4908
+Node: General Output Control8537
+Ref: General Output Control-Footnote-112636
+Node: Output Line Prefix Control12705
+Node: Context Line Control15061
+Node: File and Directory Selection17124
+Node: Other Options22916
+Node: Environment Variables25129
+Node: Exit Status35125
+Node: grep Programs35603
+Node: Regular Expressions37234
+Node: Fundamental Structure38475
+Node: Character Classes and Bracket Expressions40359
+Ref: invalid-bracket-expr43984
+Node: The Backslash Character and Special Expressions45222
+Node: Anchoring46413
+Node: Back-references and Subexpressions46875
+Node: Basic vs Extended47879
+Node: Character Encoding49888
+Node: Matching Non-ASCII51354
+Node: Usage53481
+Node: Performance61173
+Node: Reporting Bugs64873
+Node: Known Bugs65250
+Node: Copying66321
+Node: GNU Free Documentation License67449
+Node: Index92754
+
+End Tag Table
+
+
+Local Variables:
+coding: utf-8
+End:
diff --git a/src/grep/doc/grep.texi b/src/grep/doc/grep.texi
new file mode 100644
index 0000000..01ac81e
--- /dev/null
+++ b/src/grep/doc/grep.texi
@@ -0,0 +1,2109 @@
+\input texinfo  @c -*-texinfo-*-
+@c %**start of header
+@setfilename grep.info
+@include version.texi
+@settitle GNU Grep @value{VERSION}
+
+@c Combine indices.
+@syncodeindex ky cp
+@syncodeindex pg cp
+@syncodeindex tp cp
+@defcodeindex op
+@syncodeindex op cp
+@syncodeindex vr cp
+@c %**end of header
+
+@documentencoding UTF-8
+@c These two require Texinfo 5.0 or later, so use the older
+@c equivalent @set variables supported in 4.11 and later.
+@ignore
+@codequotebacktick on
+@codequoteundirected on
+@end ignore
+@set txicodequoteundirected
+@set txicodequotebacktick
+@iftex
+@c TeX sometimes fails to hyphenate, so help it here.
+@hyphenation{spec-i-fied}
+@end iftex
+
+@copying
+This manual is for @command{grep}, a pattern matching engine.
+
+Copyright @copyright{} 1999--2002, 2005, 2008--2021 Free Software Foundation,
+Inc.
+
+@quotation
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
+Texts.  A copy of the license is included in the section entitled
+``GNU Free Documentation License''.
+@end quotation
+@end copying
+
+@dircategory Text creation and manipulation
+@direntry
+* grep: (grep).                 Print lines that match patterns.
+@end direntry
+
+@titlepage
+@title GNU Grep: Print lines that match patterns
+@subtitle version @value{VERSION}, @value{UPDATED}
+@author Alain Magloire et al.
+@page
+@vskip 0pt plus 1filll
+@insertcopying
+@end titlepage
+
+@contents
+
+
+@ifnottex
+@node Top
+@top grep
+
+@command{grep} prints lines that contain a match for one or more patterns.
+
+This manual is for version @value{VERSION} of GNU Grep.
+
+@insertcopying
+@end ifnottex
+
+@menu
+* Introduction::                Introduction.
+* Invoking::                    Command-line options, environment, exit status.
+* Regular Expressions::         Regular Expressions.
+* Usage::                       Examples.
+* Performance::                 Performance tuning.
+* Reporting Bugs::              Reporting Bugs.
+* Copying::                     License terms for this manual.
+* Index::                       Combined index.
+@end menu
+
+
+@node Introduction
+@chapter Introduction
+
+@cindex searching for patterns
+
+Given one or more patterns, @command{grep} searches input files
+for matches to the patterns.
+When it finds a match in a line,
+it copies the line to standard output (by default),
+or produces whatever other sort of output you have requested with options.
+
+Though @command{grep} expects to do the matching on text,
+it has no limits on input line length other than available memory,
+and it can match arbitrary characters within a line.
+If the final byte of an input file is not a newline,
+@command{grep} silently supplies one.
+Since newline is also a separator for the list of patterns,
+there is no way to match newline characters in a text.
+
+
+@node Invoking
+@chapter Invoking @command{grep}
+
+The general synopsis of the @command{grep} command line is
+
+@example
+grep [@var{option}...] [@var{patterns}] [@var{file}...]
+@end example
+
+@noindent
+There can be zero or more @var{option} arguments, and zero or more
+@var{file} arguments.  The @var{patterns} argument contains one or
+more patterns separated by newlines, and is omitted when patterns are
+given via the @samp{-e@ @var{patterns}} or @samp{-f@ @var{file}}
+options.  Typically @var{patterns} should be quoted when
+@command{grep} is used in a shell command.
+
+@menu
+* Command-line Options::        Short and long names, grouped by category.
+* Environment Variables::       POSIX, GNU generic, and GNU grep specific.
+* Exit Status::                 Exit status returned by @command{grep}.
+* grep Programs::               @command{grep} programs.
+@end menu
+
+@node Command-line Options
+@section Command-line Options
+
+@command{grep} comes with a rich set of options:
+some from POSIX and some being GNU extensions.
+Long option names are always a GNU extension,
+even for options that are from POSIX specifications.
+Options that are specified by POSIX,
+under their short names,
+are explicitly marked as such
+to facilitate POSIX-portable programming.
+A few option names are provided
+for compatibility with older or more exotic implementations.
+
+@menu
+* Generic Program Information::
+* Matching Control::
+* General Output Control::
+* Output Line Prefix Control::
+* Context Line Control::
+* File and Directory Selection::
+* Other Options::
+@end menu
+
+Several additional options control
+which variant of the @command{grep} matching engine is used.
+@xref{grep Programs}.
+
+@node Generic Program Information
+@subsection Generic Program Information
+
+@table @option
+
+@item --help
+@opindex --help
+@cindex usage summary, printing
+Print a usage message briefly summarizing the command-line options
+and the bug-reporting address, then exit.
+
+@item -V
+@itemx --version
+@opindex -V
+@opindex --version
+@cindex version, printing
+Print the version number of @command{grep} to the standard output stream.
+This version number should be included in all bug reports.
+
+@end table
+
+@node Matching Control
+@subsection Matching Control
+
+@table @option
+
+@item -e @var{patterns}
+@itemx --regexp=@var{patterns}
+@opindex -e
+@opindex --regexp=@var{patterns}
+@cindex patterns option
+Use @var{patterns} as one or more patterns; newlines within
+@var{patterns} separate each pattern from the next.
+If this option is used multiple times or is combined with the
+@option{-f} (@option{--file}) option, search for all patterns given.
+Typically @var{patterns} should be quoted when @command{grep} is used
+in a shell command.
+(@option{-e} is specified by POSIX.)
+
+@item -f @var{file}
+@itemx --file=@var{file}
+@opindex -f
+@opindex --file
+@cindex patterns from file
+Obtain patterns from @var{file}, one per line.
+If this option is used multiple times or is combined with the
+@option{-e} (@option{--regexp}) option, search for all patterns given.
+The empty file contains zero patterns, and therefore matches nothing.
+(@option{-f} is specified by POSIX.)
+
+@item -i
+@itemx -y
+@itemx --ignore-case
+@opindex -i
+@opindex -y
+@opindex --ignore-case
+@cindex case insensitive search
+Ignore case distinctions in patterns and input data,
+so that characters that differ only in case
+match each other.  Although this is straightforward when letters
+differ in case only via lowercase-uppercase pairs, the behavior is
+unspecified in other situations.  For example, uppercase ``S'' has an
+unusual lowercase counterpart ``ſ'' (Unicode character U+017F, LATIN
+SMALL LETTER LONG S) in many locales, and it is unspecified whether
+this unusual character matches ``S'' or ``s'' even though uppercasing
+it yields ``S''.  Another example: the lowercase German letter ``ß''
+(U+00DF, LATIN SMALL LETTER SHARP S) is normally capitalized as the
+two-character string ``SS'' but it does not match ``SS'', and it might
+not match the uppercase letter ``ẞ'' (U+1E9E, LATIN CAPITAL LETTER
+SHARP S) even though lowercasing the latter yields the former.
+
+@option{-y} is an obsolete synonym that is provided for compatibility.
+(@option{-i} is specified by POSIX.)
+
+@item --no-ignore-case
+@opindex --no-ignore-case
+Do not ignore case distinctions in patterns and input data.  This is
+the default.  This option is useful for passing to shell scripts that
+already use @option{-i}, in order to cancel its effects because the
+two options override each other.
+
+@item -v
+@itemx --invert-match
+@opindex -v
+@opindex --invert-match
+@cindex invert matching
+@cindex print non-matching lines
+Invert the sense of matching, to select non-matching lines.
+(@option{-v} is specified by POSIX.)
+
+@item -w
+@itemx --word-regexp
+@opindex -w
+@opindex --word-regexp
+@cindex matching whole words
+Select only those lines containing matches that form whole words.
+The test is that the matching substring must either
+be at the beginning of the line,
+or preceded by a non-word constituent character.
+Similarly,
+it must be either at the end of the line
+or followed by a non-word constituent character.
+Word constituent characters are letters, digits, and the underscore.
+This option has no effect if @option{-x} is also specified.
+
+Because the @option{-w} option can match a substring that does not
+begin and end with word constituents, it differs from surrounding a
+regular expression with @samp{\<} and @samp{\>}.  For example, although
+@samp{grep -w @@} matches a line containing only @samp{@@}, @samp{grep
+'\<@@\>'} cannot match any line because @samp{@@} is not a
+word constituent.  @xref{The Backslash Character and Special
+Expressions}.
+
+@item -x
+@itemx --line-regexp
+@opindex -x
+@opindex --line-regexp
+@cindex match the whole line
+Select only those matches that exactly match the whole line.
+For regular expression patterns, this is like parenthesizing each
+pattern and then surrounding it with @samp{^} and @samp{$}.
+(@option{-x} is specified by POSIX.)
+
+@end table
+
+@node General Output Control
+@subsection General Output Control
+
+@table @option
+
+@item -c
+@itemx --count
+@opindex -c
+@opindex --count
+@cindex counting lines
+Suppress normal output;
+instead print a count of matching lines for each input file.
+With the @option{-v} (@option{--invert-match}) option,
+count non-matching lines.
+(@option{-c} is specified by POSIX.)
+
+@item --color[=@var{WHEN}]
+@itemx --colour[=@var{WHEN}]
+@opindex --color
+@opindex --colour
+@cindex highlight, color, colour
+Surround the matched (non-empty) strings, matching lines, context lines,
+file names, line numbers, byte offsets, and separators (for fields and
+groups of context lines) with escape sequences to display them in color
+on the terminal.
+The colors are defined by the environment variable @env{GREP_COLORS}
+and default to @samp{ms=01;31:mc=01;31:sl=:cx=:fn=35:ln=32:bn=32:se=36}
+for bold red matched text, magenta file names, green line numbers,
+green byte offsets, cyan separators, and default terminal colors otherwise.
+The deprecated environment variable @env{GREP_COLOR} is still supported,
+but its setting does not have priority;
+it defaults to @samp{01;31} (bold red)
+which only covers the color for matched text.
+@var{WHEN} is @samp{never}, @samp{always}, or @samp{auto}.
+
+@item -L
+@itemx --files-without-match
+@opindex -L
+@opindex --files-without-match
+@cindex files which don't match
+Suppress normal output;
+instead print the name of each input file from which
+no output would normally have been printed.
+
+@item -l
+@itemx --files-with-matches
+@opindex -l
+@opindex --files-with-matches
+@cindex names of matching files
+Suppress normal output;
+instead print the name of each input file from which
+output would normally have been printed.
+Scanning each input file stops upon first match.
+(@option{-l} is specified by POSIX.)
+
+@item -m @var{num}
+@itemx --max-count=@var{num}
+@opindex -m
+@opindex --max-count
+@cindex max-count
+Stop after the first @var{num} selected lines.
+If the input is standard input from a regular file,
+and @var{num} selected lines are output,
+@command{grep} ensures that the standard input is positioned
+just after the last selected line before exiting,
+regardless of the presence of trailing context lines.
+This enables a calling process to resume a search.
+For example, the following shell script makes use of it:
+
+@example
+while grep -m 1 'PATTERN'
+do
+  echo xxxx
+done < FILE
+@end example
+
+But the following probably will not work because a pipe is not a regular
+file:
+
+@example
+# This probably will not work.
+cat FILE |
+while grep -m 1 'PATTERN'
+do
+  echo xxxx
+done
+@end example
+
+@cindex context lines
+When @command{grep} stops after @var{num} selected lines,
+it outputs any trailing context lines.
+When the @option{-c} or @option{--count} option is also used,
+@command{grep} does not output a count greater than @var{num}.
+When the @option{-v} or @option{--invert-match} option is also used,
+@command{grep} stops after outputting @var{num} non-matching lines.
+
+@item -o
+@itemx --only-matching
+@opindex -o
+@opindex --only-matching
+@cindex only matching
+Print only the matched (non-empty) parts of matching lines,
+with each such part on a separate output line.
+Output lines use the same delimiters as input, and delimiters are null
+bytes if @option{-z} (@option{--null-data}) is also used (@pxref{Other
+Options}).
+
+@item -q
+@itemx --quiet
+@itemx --silent
+@opindex -q
+@opindex --quiet
+@opindex --silent
+@cindex quiet, silent
+Quiet; do not write anything to standard output.
+Exit immediately with zero status if any match is found,
+even if an error was detected.
+Also see the @option{-s} or @option{--no-messages} option.
+(@option{-q} is specified by POSIX.)
+
+@item -s
+@itemx --no-messages
+@opindex -s
+@opindex --no-messages
+@cindex suppress error messages
+Suppress error messages about nonexistent or unreadable files.
+Portability note:
+unlike GNU @command{grep},
+7th Edition Unix @command{grep} did not conform to POSIX,
+because it lacked @option{-q}
+and its @option{-s} option behaved like
+GNU @command{grep}'s @option{-q} option.@footnote{Of course, 7th Edition
+Unix predated POSIX by several years!}
+USG-style @command{grep} also lacked @option{-q}
+but its @option{-s} option behaved like GNU @command{grep}'s.
+Portable shell scripts should avoid both
+@option{-q} and @option{-s} and should redirect
+standard and error output to @file{/dev/null} instead.
+(@option{-s} is specified by POSIX.)
+
+@end table
+
+@node Output Line Prefix Control
+@subsection Output Line Prefix Control
+
+When several prefix fields are to be output,
+the order is always file name, line number, and byte offset,
+regardless of the order in which these options were specified.
+
+@table @option
+
+@item -b
+@itemx --byte-offset
+@opindex -b
+@opindex --byte-offset
+@cindex byte offset
+Print the 0-based byte offset within the input file
+before each line of output.
+If @option{-o} (@option{--only-matching}) is specified,
+print the offset of the matching part itself.
+
+@item -H
+@itemx --with-filename
+@opindex -H
+@opindex --with-filename
+@cindex with filename prefix
+Print the file name for each match.
+This is the default when there is more than one file to search.
+
+@item -h
+@itemx --no-filename
+@opindex -h
+@opindex --no-filename
+@cindex no filename prefix
+Suppress the prefixing of file names on output.
+This is the default when there is only one file
+(or only standard input) to search.
+
+@item --label=@var{LABEL}
+@opindex --label
+@cindex changing name of standard input
+Display input actually coming from standard input
+as input coming from file @var{LABEL}.
+This can be useful for commands that transform a file's contents
+before searching; e.g.:
+
+@example
+gzip -cd foo.gz | grep --label=foo -H 'some pattern'
+@end example
+
+@item -n
+@itemx --line-number
+@opindex -n
+@opindex --line-number
+@cindex line numbering
+Prefix each line of output with the 1-based line number within its input file.
+(@option{-n} is specified by POSIX.)
+
+@item -T
+@itemx --initial-tab
+@opindex -T
+@opindex --initial-tab
+@cindex tab-aligned content lines
+Make sure that the first character of actual line content lies on a tab stop,
+so that the alignment of tabs looks normal.
+This is useful with options that prefix their output to the actual content:
+@option{-H}, @option{-n}, and @option{-b}.
+This may also prepend spaces to output line numbers and byte offsets
+so that lines from a single file all start at the same column.
+
+@item -Z
+@itemx --null
+@opindex -Z
+@opindex --null
+@cindex zero-terminated file names
+Output a zero byte (the ASCII NUL character)
+instead of the character that normally follows a file name.
+For example,
+@samp{grep -lZ} outputs a zero byte after each file name
+instead of the usual newline.
+This option makes the output unambiguous,
+even in the presence of file names containing unusual characters like newlines.
+This option can be used with commands like
+@samp{find -print0}, @samp{perl -0}, @samp{sort -z}, and @samp{xargs -0}
+to process arbitrary file names,
+even those that contain newline characters.
+
+@end table
+
+@node Context Line Control
+@subsection Context Line Control
+
+@cindex context lines
+@dfn{Context lines} are non-matching lines that are near a matching line.
+They are output only if one of the following options are used.
+Regardless of how these options are set,
+@command{grep} never outputs any given line more than once.
+If the @option{-o} (@option{--only-matching}) option is specified,
+these options have no effect and a warning is given upon their use.
+
+@table @option
+
+@item -A @var{num}
+@itemx --after-context=@var{num}
+@opindex -A
+@opindex --after-context
+@cindex after context
+@cindex context lines, after match
+Print @var{num} lines of trailing context after matching lines.
+
+@item -B @var{num}
+@itemx --before-context=@var{num}
+@opindex -B
+@opindex --before-context
+@cindex before context
+@cindex context lines, before match
+Print @var{num} lines of leading context before matching lines.
+
+@item -C @var{num}
+@itemx -@var{num}
+@itemx --context=@var{num}
+@opindex -C
+@opindex --context
+@opindex -@var{num}
+@cindex context lines
+Print @var{num} lines of leading and trailing output context.
+
+@item --group-separator=@var{string}
+@opindex --group-separator
+@cindex group separator
+When @option{-A}, @option{-B} or @option{-C} are in use,
+print @var{string} instead of @option{--} between groups of lines.
+
+@item --no-group-separator
+@opindex --group-separator
+@cindex group separator
+When @option{-A}, @option{-B} or @option{-C} are in use,
+do not print a separator between groups of lines.
+
+@end table
+
+Here are some points about how @command{grep} chooses
+the separator to print between prefix fields and line content:
+
+@itemize @bullet
+@item
+Matching lines normally use @samp{:} as a separator
+between prefix fields and actual line content.
+
+@item
+Context (i.e., non-matching) lines use @samp{-} instead.
+
+@item
+When context is not specified,
+matching lines are simply output one right after another.
+
+@item
+When context is specified,
+lines that are adjacent in the input form a group
+and are output one right after another, while
+by default a separator appears between non-adjacent groups.
+
+@item
+The default separator
+is a @samp{--} line; its presence and appearance
+can be changed with the options above.
+
+@item
+Each group may contain
+several matching lines when they are close enough to each other
+that two adjacent groups connect and can merge into a single
+contiguous one.
+@end itemize
+
+@node File and Directory Selection
+@subsection File and Directory Selection
+
+@table @option
+
+@item -a
+@itemx --text
+@opindex -a
+@opindex --text
+@cindex suppress binary data
+@cindex binary files
+Process a binary file as if it were text;
+this is equivalent to the @samp{--binary-files=text} option.
+
+@item --binary-files=@var{type}
+@opindex --binary-files
+@cindex binary files
+If a file's data or metadata
+indicate that the file contains binary data,
+assume that the file is of type @var{type}.
+Non-text bytes indicate binary data; these are either output bytes that are
+improperly encoded for the current locale (@pxref{Environment
+Variables}), or null input bytes when the
+@option{-z} (@option{--null-data}) option is not given (@pxref{Other
+Options}).
+
+By default, @var{type} is @samp{binary}, and @command{grep}
+suppresses output after null input binary data is discovered,
+and suppresses output lines that contain improperly encoded data.
+When some output is suppressed, @command{grep} follows any output
+with a one-line message saying that a binary file matches.
+
+If @var{type} is @samp{without-match},
+when @command{grep} discovers null input binary data
+it assumes that the rest of the file does not match;
+this is equivalent to the @option{-I} option.
+
+If @var{type} is @samp{text},
+@command{grep} processes binary data as if it were text;
+this is equivalent to the @option{-a} option.
+
+When @var{type} is @samp{binary}, @command{grep} may treat non-text
+bytes as line terminators even without the @option{-z}
+(@option{--null-data}) option.  This means choosing @samp{binary}
+versus @samp{text} can affect whether a pattern matches a file.  For
+example, when @var{type} is @samp{binary} the pattern @samp{q$} might
+match @samp{q} immediately followed by a null byte, even though this
+is not matched when @var{type} is @samp{text}.  Conversely, when
+@var{type} is @samp{binary} the pattern @samp{.} (period) might not
+match a null byte.
+
+@emph{Warning:} The @option{-a} (@option{--binary-files=text}) option
+might output binary garbage, which can have nasty side effects if the
+output is a terminal and if the terminal driver interprets some of it
+as commands.  On the other hand, when reading files whose text
+encodings are unknown, it can be helpful to use @option{-a} or to set
+@samp{LC_ALL='C'} in the environment, in order to find more matches
+even if the matches are unsafe for direct display.
+
+@item -D @var{action}
+@itemx --devices=@var{action}
+@opindex -D
+@opindex --devices
+@cindex device search
+If an input file is a device, FIFO, or socket, use @var{action} to process it.
+If @var{action} is @samp{read},
+all devices are read just as if they were ordinary files.
+If @var{action} is @samp{skip},
+devices, FIFOs, and sockets are silently skipped.
+By default, devices are read if they are on the command line or if the
+@option{-R} (@option{--dereference-recursive}) option is used, and are
+skipped if they are encountered recursively and the @option{-r}
+(@option{--recursive}) option is used.
+This option has no effect on a file that is read via standard input.
+
+@item -d @var{action}
+@itemx --directories=@var{action}
+@opindex -d
+@opindex --directories
+@cindex directory search
+@cindex symbolic links
+If an input file is a directory, use @var{action} to process it.
+By default, @var{action} is @samp{read},
+which means that directories are read just as if they were ordinary files
+(some operating systems and file systems disallow this,
+and will cause @command{grep}
+to print error messages for every directory or silently skip them).
+If @var{action} is @samp{skip}, directories are silently skipped.
+If @var{action} is @samp{recurse},
+@command{grep} reads all files under each directory, recursively,
+following command-line symbolic links and skipping other symlinks;
+this is equivalent to the @option{-r} option.
+
+@item --exclude=@var{glob}
+@opindex --exclude
+@cindex exclude files
+@cindex searching directory trees
+Skip any command-line file with a name suffix that matches the pattern
+@var{glob}, using wildcard matching; a name suffix is either the whole
+name, or a trailing part that starts with a non-slash character
+immediately after a slash (@samp{/}) in the name.
+When searching recursively, skip any subfile whose base
+name matches @var{glob}; the base name is the part after the last
+slash.  A pattern can use
+@samp{*}, @samp{?}, and @samp{[}...@samp{]} as wildcards,
+and @code{\} to quote a wildcard or backslash character literally.
+
+@item --exclude-from=@var{file}
+@opindex --exclude-from
+@cindex exclude files
+@cindex searching directory trees
+Skip files whose name matches any of the patterns
+read from @var{file} (using wildcard matching as described
+under @option{--exclude}).
+
+@item --exclude-dir=@var{glob}
+@opindex --exclude-dir
+@cindex exclude directories
+Skip any command-line directory with a name suffix that matches the
+pattern @var{glob}.  When searching recursively, skip any subdirectory
+whose base name matches @var{glob}.  Ignore any redundant trailing
+slashes in @var{glob}.
+
+@item -I
+Process a binary file as if it did not contain matching data;
+this is equivalent to the @samp{--binary-files=without-match} option.
+
+@item --include=@var{glob}
+@opindex --include
+@cindex include files
+@cindex searching directory trees
+Search only files whose name matches @var{glob},
+using wildcard matching as described under @option{--exclude}.
+If contradictory @option{--include} and @option{--exclude} options are
+given, the last matching one wins.  If no @option{--include} or
+@option{--exclude} options match, a file is included unless the first
+such option is @option{--include}.
+
+@item -r
+@itemx --recursive
+@opindex -r
+@opindex --recursive
+@cindex recursive search
+@cindex searching directory trees
+@cindex symbolic links
+For each directory operand,
+read and process all files in that directory, recursively.
+Follow symbolic links on the command line, but skip symlinks
+that are encountered recursively.
+Note that if no file operand is given, grep searches the working directory.
+This is the same as the @samp{--directories=recurse} option.
+
+@item -R
+@itemx --dereference-recursive
+@opindex -R
+@opindex --dereference-recursive
+@cindex recursive search
+@cindex searching directory trees
+@cindex symbolic links
+For each directory operand, read and process all files in that
+directory, recursively, following all symbolic links.
+
+@end table
+
+@node Other Options
+@subsection Other Options
+
+@table @option
+
+@item --
+@opindex --
+@cindex option delimiter
+Delimit the option list.  Later arguments, if any, are treated as
+operands even if they begin with @samp{-}.  For example, @samp{grep PAT --
+-file1 file2} searches for the pattern PAT in the files named @file{-file1}
+and @file{file2}.
+
+@item --line-buffered
+@opindex --line-buffered
+@cindex line buffering
+Use line buffering for standard output, regardless of output device.
+By default, standard output is line buffered for interactive devices,
+and is fully buffered otherwise.  With full buffering, the output
+buffer is flushed when full; with line buffering, the buffer is also
+flushed after every output line.  The buffer size is system dependent.
+
+@item -U
+@itemx --binary
+@opindex -U
+@opindex --binary
+@cindex MS-Windows binary I/O
+@cindex binary I/O
+On platforms that distinguish between text and binary I/O,
+use the latter when reading and writing files other
+than the user's terminal, so that all input bytes are read and written
+as-is.  This overrides the default behavior where @command{grep}
+follows the operating system's advice whether to use text or binary
+I/O@.  On MS-Windows when @command{grep} uses text I/O it reads a
+carriage return--newline pair as a newline and a Control-Z as
+end-of-file, and it writes a newline as a carriage return--newline
+pair.
+
+When using text I/O @option{--byte-offset} (@option{-b}) counts and
+@option{--binary-files} heuristics apply to input data after text-I/O
+processing.  Also, the @option{--binary-files} heuristics need not agree
+with the @option{--binary} option; that is, they may treat the data as
+text even if @option{--binary} is given, or vice versa.
+@xref{File and Directory Selection}.
+
+This option has no effect on GNU and other POSIX-compatible platforms,
+which do not distinguish text from binary I/O.
+
+@item -z
+@itemx --null-data
+@opindex -z
+@opindex --null-data
+@cindex zero-terminated lines
+Treat input and output data as sequences of lines, each terminated by
+a zero byte (the ASCII NUL character) instead of a newline.
+Like the @option{-Z} or @option{--null} option,
+this option can be used with commands like
+@samp{sort -z} to process arbitrary file names.
+
+@end table
+
+@node Environment Variables
+@section Environment Variables
+
+The behavior of @command{grep} is affected
+by the following environment variables.
+
+@vindex LANGUAGE @r{environment variable}
+@vindex LC_ALL @r{environment variable}
+@vindex LC_MESSAGES @r{environment variable}
+@vindex LANG @r{environment variable}
+The locale for category @w{@code{LC_@var{foo}}}
+is specified by examining the three environment variables
+@env{LC_ALL}, @w{@env{LC_@var{foo}}}, and @env{LANG},
+in that order.
+The first of these variables that is set specifies the locale.
+For example, if @env{LC_ALL} is not set,
+but @env{LC_COLLATE} is set to @samp{pt_BR},
+then the Brazilian Portuguese locale is used
+for the @env{LC_COLLATE} category.
+As a special case for @env{LC_MESSAGES} only, the environment variable
+@env{LANGUAGE} can contain a colon-separated list of languages that
+overrides the three environment variables that ordinarily specify
+the @env{LC_MESSAGES} category.
+The @samp{C} locale is used if none of these environment variables are set,
+if the locale catalog is not installed,
+or if @command{grep} was not compiled
+with national language support (NLS).
+The shell command @code{locale -a} lists locales that are currently available.
+
+Many of the environment variables in the following list let you
+control highlighting using
+Select Graphic Rendition (SGR)
+commands interpreted by the terminal or terminal emulator.
+(See the
+section
+in the documentation of your text terminal
+for permitted values and their meanings as character attributes.)
+These substring values are integers in decimal representation
+and can be concatenated with semicolons.
+@command{grep} takes care of assembling the result
+into a complete SGR sequence (@samp{\33[}...@samp{m}).
+Common values to concatenate include
+@samp{1} for bold,
+@samp{4} for underline,
+@samp{5} for blink,
+@samp{7} for inverse,
+@samp{39} for default foreground color,
+@samp{30} to @samp{37} for foreground colors,
+@samp{90} to @samp{97} for 16-color mode foreground colors,
+@samp{38;5;0} to @samp{38;5;255}
+for 88-color and 256-color modes foreground colors,
+@samp{49} for default background color,
+@samp{40} to @samp{47} for background colors,
+@samp{100} to @samp{107} for 16-color mode background colors,
+and @samp{48;5;0} to @samp{48;5;255}
+for 88-color and 256-color modes background colors.
+
+The two-letter names used in the @env{GREP_COLORS} environment variable
+(and some of the others) refer to terminal ``capabilities,'' the ability
+of a terminal to highlight text, or change its color, and so on.
+These capabilities are stored in an online database and accessed by
+the @code{terminfo} library.
+
+@cindex environment variables
+
+@table @env
+
+@item GREP_COLOR
+@vindex GREP_COLOR @r{environment variable}
+@cindex highlight markers
+This variable specifies the color used to highlight matched (non-empty) text.
+It is deprecated in favor of @env{GREP_COLORS}, but still supported.
+The @samp{mt}, @samp{ms}, and @samp{mc} capabilities of @env{GREP_COLORS}
+have priority over it.
+It can only specify the color used to highlight
+the matching non-empty text in any matching line
+(a selected line when the @option{-v} command-line option is omitted,
+or a context line when @option{-v} is specified).
+The default is @samp{01;31},
+which means a bold red foreground text on the terminal's default background.
+
+@item GREP_COLORS
+@vindex GREP_COLORS @r{environment variable}
+@cindex highlight markers
+This variable specifies the colors and other attributes
+used to highlight various parts of the output.
+Its value is a colon-separated list of @code{terminfo} capabilities
+that defaults to @samp{ms=01;31:mc=01;31:sl=:cx=:fn=35:ln=32:bn=32:se=36}
+with the @samp{rv} and @samp{ne} boolean capabilities omitted (i.e., false).
+Supported capabilities are as follows.
+
+@table @code
+@item sl=
+@vindex sl GREP_COLORS @r{capability}
+SGR substring for whole selected lines
+(i.e.,
+matching lines when the @option{-v} command-line option is omitted,
+or non-matching lines when @option{-v} is specified).
+If however the boolean @samp{rv} capability
+and the @option{-v} command-line option are both specified,
+it applies to context matching lines instead.
+The default is empty (i.e., the terminal's default color pair).
+
+@item cx=
+@vindex cx GREP_COLORS @r{capability}
+SGR substring for whole context lines
+(i.e.,
+non-matching lines when the @option{-v} command-line option is omitted,
+or matching lines when @option{-v} is specified).
+If however the boolean @samp{rv} capability
+and the @option{-v} command-line option are both specified,
+it applies to selected non-matching lines instead.
+The default is empty (i.e., the terminal's default color pair).
+
+@item rv
+@vindex rv GREP_COLORS @r{capability}
+Boolean value that reverses (swaps) the meanings of
+the @samp{sl=} and @samp{cx=} capabilities
+when the @option{-v} command-line option is specified.
+The default is false (i.e., the capability is omitted).
+
+@item mt=01;31
+@vindex mt GREP_COLORS @r{capability}
+SGR substring for matching non-empty text in any matching line
+(i.e.,
+a selected line when the @option{-v} command-line option is omitted,
+or a context line when @option{-v} is specified).
+Setting this is equivalent to setting both @samp{ms=} and @samp{mc=}
+at once to the same value.
+The default is a bold red text foreground over the current line background.
+
+@item ms=01;31
+@vindex ms GREP_COLORS @r{capability}
+SGR substring for matching non-empty text in a selected line.
+(This is used only when the @option{-v} command-line option is omitted.)
+The effect of the @samp{sl=} (or @samp{cx=} if @samp{rv}) capability
+remains active when this takes effect.
+The default is a bold red text foreground over the current line background.
+
+@item mc=01;31
+@vindex mc GREP_COLORS @r{capability}
+SGR substring for matching non-empty text in a context line.
+(This is used only when the @option{-v} command-line option is specified.)
+The effect of the @samp{cx=} (or @samp{sl=} if @samp{rv}) capability
+remains active when this takes effect.
+The default is a bold red text foreground over the current line background.
+
+@item fn=35
+@vindex fn GREP_COLORS @r{capability}
+SGR substring for file names prefixing any content line.
+The default is a magenta text foreground over the terminal's default background.
+
+@item ln=32
+@vindex ln GREP_COLORS @r{capability}
+SGR substring for line numbers prefixing any content line.
+The default is a green text foreground over the terminal's default background.
+
+@item bn=32
+@vindex bn GREP_COLORS @r{capability}
+SGR substring for byte offsets prefixing any content line.
+The default is a green text foreground over the terminal's default background.
+
+@item se=36
+@vindex fn GREP_COLORS @r{capability}
+SGR substring for separators that are inserted
+between selected line fields (@samp{:}),
+between context line fields (@samp{-}),
+and between groups of adjacent lines
+when nonzero context is specified (@samp{--}).
+The default is a cyan text foreground over the terminal's default background.
+
+@item ne
+@vindex ne GREP_COLORS @r{capability}
+Boolean value that prevents clearing to the end of line
+using Erase in Line (EL) to Right (@samp{\33[K})
+each time a colorized item ends.
+This is needed on terminals on which EL is not supported.
+It is otherwise useful on terminals
+for which the @code{back_color_erase}
+(@code{bce}) boolean @code{terminfo} capability does not apply,
+when the chosen highlight colors do not affect the background,
+or when EL is too slow or causes too much flicker.
+The default is false (i.e., the capability is omitted).
+@end table
+
+Note that boolean capabilities have no @samp{=}... part.
+They are omitted (i.e., false) by default and become true when specified.
+
+
+@item LC_ALL
+@itemx LC_COLLATE
+@itemx LANG
+@vindex LC_ALL @r{environment variable}
+@vindex LC_COLLATE @r{environment variable}
+@vindex LANG @r{environment variable}
+@cindex character type
+@cindex national language support
+@cindex NLS
+These variables specify the locale for the @env{LC_COLLATE} category,
+which might affect how range expressions like @samp{[a-z]} are
+interpreted.
+
+@item LC_ALL
+@itemx LC_CTYPE
+@itemx LANG
+@vindex LC_ALL @r{environment variable}
+@vindex LC_CTYPE @r{environment variable}
+@vindex LANG @r{environment variable}
+@cindex encoding error
+@cindex null character
+These variables specify the locale for the @env{LC_CTYPE} category,
+which determines the type of characters,
+e.g., which characters are whitespace.
+This category also determines the character encoding.
+@xref{Character Encoding}.
+
+@item LANGUAGE
+@itemx LC_ALL
+@itemx LC_MESSAGES
+@itemx LANG
+@vindex LANGUAGE @r{environment variable}
+@vindex LC_ALL @r{environment variable}
+@vindex LC_MESSAGES @r{environment variable}
+@vindex LANG @r{environment variable}
+@cindex language of messages
+@cindex message language
+@cindex national language support
+@cindex translation of message language
+These variables specify the locale for the @env{LC_MESSAGES} category,
+which determines the language that @command{grep} uses for messages.
+The default @samp{C} locale uses American English messages.
+
+@item POSIXLY_CORRECT
+@vindex POSIXLY_CORRECT @r{environment variable}
+If set, @command{grep} behaves as POSIX requires; otherwise,
+@command{grep} behaves more like other GNU programs.
+POSIX
+requires that options that
+follow file names must be treated as file names;
+by default,
+such options are permuted to the front of the operand list
+and are treated as options.
+Also, @env{POSIXLY_CORRECT} disables special handling of an
+invalid bracket expression.  @xref{invalid-bracket-expr}.
+
+@item _@var{N}_GNU_nonoption_argv_flags_
+@vindex _@var{N}_GNU_nonoption_argv_flags_ @r{environment variable}
+(Here @code{@var{N}} is @command{grep}'s numeric process ID.)
+If the @var{i}th character of this environment variable's value is @samp{1},
+do not consider the @var{i}th operand of @command{grep} to be an option,
+even if it appears to be one.
+A shell can put this variable in the environment for each command it runs,
+specifying which operands are the results of file name wildcard expansion
+and therefore should not be treated as options.
+This behavior is available only with the GNU C library,
+and only when @env{POSIXLY_CORRECT} is not set.
+
+@end table
+
+The @env{GREP_OPTIONS} environment variable of @command{grep} 2.20 and
+earlier is no longer supported, as it caused problems when writing
+portable scripts.  To make arbitrary changes to how @command{grep}
+works, you can use an alias or script instead.  For example, if
+@command{grep} is in the directory @samp{/usr/bin} you can prepend
+@file{$HOME/bin} to your @env{PATH} and create an executable script
+@file{$HOME/bin/grep} containing the following:
+
+@example
+#! /bin/sh
+export PATH=/usr/bin
+exec grep --color=auto --devices=skip "$@@"
+@end example
+
+
+@node Exit Status
+@section Exit Status
+@cindex exit status
+@cindex return status
+
+Normally the exit status is 0 if a line is selected, 1 if no lines
+were selected, and 2 if an error occurred.  However, if the
+@option{-q} or @option{--quiet} or @option{--silent} option is used
+and a line is selected, the exit status is 0 even if an error
+occurred.  Other @command{grep} implementations may exit with status
+greater than 2 on error.
+
+@node grep Programs
+@section @command{grep} Programs
+@cindex @command{grep} programs
+@cindex variants of @command{grep}
+
+@command{grep} searches the named input files
+for lines containing a match to the given patterns.
+By default, @command{grep} prints the matching lines.
+A file named @file{-} stands for standard input.
+If no input is specified, @command{grep} searches the working
+directory @file{.} if given a command-line option specifying
+recursion; otherwise, @command{grep} searches standard input.
+There are four major variants of @command{grep},
+controlled by the following options.
+
+@table @option
+
+@item -G
+@itemx --basic-regexp
+@opindex -G
+@opindex --basic-regexp
+@cindex matching basic regular expressions
+Interpret patterns as basic regular expressions (BREs).
+This is the default.
+
+@item -E
+@itemx --extended-regexp
+@opindex -E
+@opindex --extended-regexp
+@cindex matching extended regular expressions
+Interpret patterns as extended regular expressions (EREs).
+(@option{-E} is specified by POSIX.)
+
+@item -F
+@itemx --fixed-strings
+@opindex -F
+@opindex --fixed-strings
+@cindex matching fixed strings
+Interpret patterns as fixed strings, not regular expressions.
+(@option{-F} is specified by POSIX.)
+
+@item -P
+@itemx --perl-regexp
+@opindex -P
+@opindex --perl-regexp
+@cindex matching Perl-compatible regular expressions
+Interpret patterns as Perl-compatible regular expressions (PCREs).
+PCRE support is here to stay, but consider this option experimental when
+combined with the @option{-z} (@option{--null-data}) option, and note that
+@samp{grep@ -P} may warn of unimplemented features.
+@xref{Other Options}.
+
+@end table
+
+In addition,
+two variant programs @command{egrep} and @command{fgrep} are available.
+@command{egrep} is the same as @samp{grep@ -E}.
+@command{fgrep} is the same as @samp{grep@ -F}.
+Direct invocation as either
+@command{egrep} or @command{fgrep} is deprecated,
+but is provided to allow historical applications
+that rely on them to run unmodified.
+
+
+@node Regular Expressions
+@chapter Regular Expressions
+@cindex regular expressions
+
+A @dfn{regular expression} is a pattern that describes a set of strings.
+Regular expressions are constructed analogously to arithmetic expressions,
+by using various operators to combine smaller expressions.
+@command{grep} understands
+three different versions of regular expression syntax:
+basic (BRE), extended (ERE), and Perl-compatible (PCRE).
+In GNU @command{grep},
+there is no difference in available functionality between the basic and
+extended syntaxes.
+In other implementations, basic regular expressions are less powerful.
+The following description applies to extended regular expressions;
+differences for basic regular expressions are summarized afterwards.
+Perl-compatible regular expressions give additional functionality, and
+are documented in the @i{pcresyntax}(3) and @i{pcrepattern}(3) manual
+pages, but work only if PCRE is available in the system.
+
+@menu
+* Fundamental Structure::
+* Character Classes and Bracket Expressions::
+* The Backslash Character and Special Expressions::
+* Anchoring::
+* Back-references and Subexpressions::
+* Basic vs Extended::
+* Character Encoding::
+* Matching Non-ASCII::
+@end menu
+
+@node Fundamental Structure
+@section Fundamental Structure
+
+@cindex ordinary characters
+@cindex special characters
+In regular expressions, the characters @samp{.?*+@{|()[\^$} are
+@dfn{special characters} and have uses described below.  All other
+characters are @dfn{ordinary characters}, and each ordinary character
+is a regular expression that matches itself.
+
+@opindex .
+@cindex dot
+@cindex period
+The period @samp{.} matches any single character.
+It is unspecified whether @samp{.} matches an encoding error.
+
+@cindex interval expressions
+A regular expression may be followed by one of several
+repetition operators; the operators beginning with @samp{@{}
+are called @dfn{interval expressions}.
+
+@table @samp
+
+@item ?
+@opindex ?
+@cindex question mark
+@cindex match expression at most once
+The preceding item is optional and is matched at most once.
+
+@item *
+@opindex *
+@cindex asterisk
+@cindex match expression zero or more times
+The preceding item is matched zero or more times.
+
+@item +
+@opindex +
+@cindex plus sign
+@cindex match expression one or more times
+The preceding item is matched one or more times.
+
+@item @{@var{n}@}
+@opindex @{@var{n}@}
+@cindex braces, one argument
+@cindex match expression @var{n} times
+The preceding item is matched exactly @var{n} times.
+
+@item @{@var{n},@}
+@opindex @{@var{n},@}
+@cindex braces, second argument omitted
+@cindex match expression @var{n} or more times
+The preceding item is matched @var{n} or more times.
+
+@item @{,@var{m}@}
+@opindex @{,@var{m}@}
+@cindex braces, first argument omitted
+@cindex match expression at most @var{m} times
+The preceding item is matched at most @var{m} times.
+This is a GNU extension.
+
+@item @{@var{n},@var{m}@}
+@opindex @{@var{n},@var{m}@}
+@cindex braces, two arguments
+@cindex match expression from @var{n} to @var{m} times
+The preceding item is matched at least @var{n} times, but not more than
+@var{m} times.
+
+@end table
+
+The empty regular expression matches the empty string.
+Two regular expressions may be concatenated;
+the resulting regular expression
+matches any string formed by concatenating two substrings
+that respectively match the concatenated expressions.
+
+Two regular expressions may be joined by the infix operator @samp{|};
+the resulting regular expression
+matches any string matching either alternate expression.
+
+Repetition takes precedence over concatenation,
+which in turn takes precedence over alternation.
+A whole expression may be enclosed in parentheses
+to override these precedence rules and form a subexpression.
+An unmatched @samp{)} matches just itself.
+
+@node Character Classes and Bracket Expressions
+@section Character Classes and Bracket Expressions
+
+@cindex bracket expression
+@cindex character class
+A @dfn{bracket expression} is a list of characters enclosed by @samp{[} and
+@samp{]}.
+It matches any single character in that list.
+If the first character of the list is the caret @samp{^},
+then it matches any character @strong{not} in the list,
+and it is unspecified whether it matches an encoding error.
+For example, the regular expression
+@samp{[0123456789]} matches any single digit,
+whereas @samp{[^()]} matches any single character that is not
+an opening or closing parenthesis, and might or might not match an
+encoding error.
+
+@cindex range expression
+Within a bracket expression, a @dfn{range expression} consists of two
+characters separated by a hyphen.
+It matches any single character that
+sorts between the two characters, inclusive.
+In the default C locale, the sorting sequence is the native character
+order; for example, @samp{[a-d]} is equivalent to @samp{[abcd]}.
+In other locales, the sorting sequence is not specified, and
+@samp{[a-d]} might be equivalent to @samp{[abcd]} or to
+@samp{[aBbCcDd]}, or it might fail to match any character, or the set of
+characters that it matches might even be erratic.
+To obtain the traditional interpretation
+of bracket expressions, you can use the @samp{C} locale by setting the
+@env{LC_ALL} environment variable to the value @samp{C}.
+
+Finally, certain named classes of characters are predefined within
+bracket expressions, as follows.
+Their interpretation depends on the @env{LC_CTYPE} locale;
+for example, @samp{[[:alnum:]]} means the character class of numbers and letters
+in the current locale.
+
+@cindex classes of characters
+@cindex character classes
+@table @samp
+
+@item [:alnum:]
+@opindex alnum @r{character class}
+@cindex alphanumeric characters
+Alphanumeric characters:
+@samp{[:alpha:]} and @samp{[:digit:]}; in the @samp{C} locale and ASCII
+character encoding, this is the same as @samp{[0-9A-Za-z]}.
+
+@item [:alpha:]
+@opindex alpha @r{character class}
+@cindex alphabetic characters
+Alphabetic characters:
+@samp{[:lower:]} and @samp{[:upper:]}; in the @samp{C} locale and ASCII
+character encoding, this is the same as @samp{[A-Za-z]}.
+
+@item [:blank:]
+@opindex blank @r{character class}
+@cindex blank characters
+Blank characters:
+space and tab.
+
+@item [:cntrl:]
+@opindex cntrl @r{character class}
+@cindex control characters
+Control characters.
+In ASCII, these characters have octal codes 000
+through 037, and 177 (DEL).
+In other character sets, these are
+the equivalent characters, if any.
+
+@item [:digit:]
+@opindex digit @r{character class}
+@cindex digit characters
+@cindex numeric characters
+Digits: @code{0 1 2 3 4 5 6 7 8 9}.
+
+@item [:graph:]
+@opindex graph @r{character class}
+@cindex graphic characters
+Graphical characters:
+@samp{[:alnum:]} and @samp{[:punct:]}.
+
+@item [:lower:]
+@opindex lower @r{character class}
+@cindex lower-case letters
+Lower-case letters; in the @samp{C} locale and ASCII character
+encoding, this is
+@code{a b c d e f g h i j k l m n o p q r s t u v w x y z}.
+
+@item [:print:]
+@opindex print @r{character class}
+@cindex printable characters
+Printable characters:
+@samp{[:alnum:]}, @samp{[:punct:]}, and space.
+
+@item [:punct:]
+@opindex punct @r{character class}
+@cindex punctuation characters
+Punctuation characters; in the @samp{C} locale and ASCII character
+encoding, this is
+@code{!@: " # $ % & ' ( ) * + , - .@: / : ; < = > ?@: @@ [ \ ] ^ _ ` @{ | @} ~}.
+
+@item [:space:]
+@opindex space @r{character class}
+@cindex space characters
+@cindex whitespace characters
+Space characters: in the @samp{C} locale, this is
+tab, newline, vertical tab, form feed, carriage return, and space.
+@xref{Usage}, for more discussion of matching newlines.
+
+@item [:upper:]
+@opindex upper @r{character class}
+@cindex upper-case letters
+Upper-case letters: in the @samp{C} locale and ASCII character
+encoding, this is
+@code{A B C D E F G H I J K L M N O P Q R S T U V W X Y Z}.
+
+@item [:xdigit:]
+@opindex xdigit @r{character class}
+@cindex xdigit class
+@cindex hexadecimal digits
+Hexadecimal digits:
+@code{0 1 2 3 4 5 6 7 8 9 A B C D E F a b c d e f}.
+
+@end table
+Note that the brackets in these class names are
+part of the symbolic names, and must be included in addition to
+the brackets delimiting the bracket expression.
+
+@anchor{invalid-bracket-expr}
+If you mistakenly omit the outer brackets, and search for say, @samp{[:upper:]},
+GNU @command{grep} prints a diagnostic and exits with status 2, on
+the assumption that you did not intend to search for the nominally
+equivalent regular expression: @samp{[:epru]}.
+Set the @env{POSIXLY_CORRECT} environment variable to disable this feature.
+
+Special characters lose their special meaning inside bracket expressions.
+
+@table @samp
+@item ]
+ends the bracket expression if it's not the first list item.
+So, if you want to make the @samp{]} character a list item,
+you must put it first.
+
+@item [.
+represents the open collating symbol.
+
+@item .]
+represents the close collating symbol.
+
+@item [=
+represents the open equivalence class.
+
+@item =]
+represents the close equivalence class.
+
+@item [:
+represents the open character class symbol, and should be followed by a
+valid character class name.
+
+@item :]
+represents the close character class symbol.
+
+@item -
+represents the range if it's not first or last in a list or the ending point
+of a range.
+
+@item ^
+represents the characters not in the list.
+If you want to make the @samp{^}
+character a list item, place it anywhere but first.
+
+@end table
+
+@node The Backslash Character and Special Expressions
+@section The Backslash Character and Special Expressions
+@cindex backslash
+
+The @samp{\} character followed by a special character is a regular
+expression that matches the special character.
+The @samp{\} character,
+when followed by certain ordinary characters,
+takes a special meaning:
+
+@table @samp
+
+@item \b
+Match the empty string at the edge of a word.
+
+@item \B
+Match the empty string provided it's not at the edge of a word.
+
+@item \<
+Match the empty string at the beginning of a word.
+
+@item \>
+Match the empty string at the end of a word.
+
+@item \w
+Match word constituent, it is a synonym for @samp{[_[:alnum:]]}.
+
+@item \W
+Match non-word constituent, it is a synonym for @samp{[^_[:alnum:]]}.
+
+@item \s
+Match whitespace, it is a synonym for @samp{[[:space:]]}.
+
+@item \S
+Match non-whitespace, it is a synonym for @samp{[^[:space:]]}.
+
+@end table
+
+For example, @samp{\brat\b} matches the separate word @samp{rat},
+@samp{\Brat\B} matches @samp{crate} but not @samp{furry rat}.
+
+@node Anchoring
+@section Anchoring
+@cindex anchoring
+
+The caret @samp{^} and the dollar sign @samp{$} are special characters that
+respectively match the empty string at the beginning and end of a line.
+They are termed @dfn{anchors}, since they force the match to be ``anchored''
+to beginning or end of a line, respectively.
+
+@node Back-references and Subexpressions
+@section Back-references and Subexpressions
+@cindex subexpression
+@cindex back-reference
+
+The back-reference @samp{\@var{n}},
+where @var{n} is a single nonzero digit, matches
+the substring previously matched by the @var{n}th parenthesized subexpression
+of the regular expression.
+For example, @samp{(a)\1} matches @samp{aa}.
+If the parenthesized subexpression does not participate in the match,
+the back-reference makes the whole match fail;
+for example, @samp{(a)*\1} fails to match @samp{a}.
+If the parenthesized subexpression matches more than one substring,
+the back-reference refers to the last matched substring;
+for example, @samp{^(ab*)*\1$} matches @samp{ababbabb} but not @samp{ababbab}.
+When multiple regular expressions are given with
+@option{-e} or from a file (@samp{-f @var{file}}),
+back-references are local to each expression.
+
+@xref{Known Bugs}, for some known problems with back-references.
+
+@node Basic vs Extended
+@section Basic vs Extended Regular Expressions
+@cindex basic regular expressions
+
+In basic regular expressions the characters @samp{?}, @samp{+},
+@samp{@{}, @samp{|}, @samp{(}, and @samp{)} lose their special meaning;
+instead use the backslashed versions @samp{\?}, @samp{\+}, @samp{\@{},
+@samp{\|}, @samp{\(}, and @samp{\)}.  Also, a backslash is needed
+before an interval expression's closing @samp{@}}, and an unmatched
+@code{\)} is invalid.
+
+Portable scripts should avoid the following constructs, as
+POSIX says they produce undefined results:
+
+@itemize @bullet
+@item
+Extended regular expressions that use back-references.
+@item
+Basic regular expressions that use @samp{\?}, @samp{\+}, or @samp{\|}.
+@item
+Empty parenthesized regular expressions like @samp{()}.
+@item
+Empty alternatives (as in, e.g, @samp{a|}).
+@item
+Repetition operators that immediately follow empty expressions,
+unescaped @samp{$}, or other repetition operators.
+@item
+A backslash escaping an ordinary character (e.g., @samp{\S}),
+unless it is a back-reference.
+@item
+An unescaped @samp{[} that is not part of a bracket expression.
+@item
+In extended regular expressions, an unescaped @samp{@{} that is not
+part of an interval expression.
+@end itemize
+
+@cindex interval expressions
+Traditional @command{egrep} did not support interval expressions and
+some @command{egrep} implementations use @samp{\@{} and @samp{\@}} instead, so
+portable scripts should avoid interval expressions in @samp{grep@ -E} patterns
+and should use @samp{[@{]} to match a literal @samp{@{}.
+
+GNU @command{grep@ -E} attempts to support traditional usage by
+assuming that @samp{@{} is not special if it would be the start of an
+invalid interval expression.
+For example, the command
+@samp{grep@ -E@ '@{1'} searches for the two-character string @samp{@{1}
+instead of reporting a syntax error in the regular expression.
+POSIX allows this behavior as an extension, but portable scripts
+should avoid it.
+
+@node Character Encoding
+@section Character Encoding
+@cindex character encoding
+
+The @env{LC_CTYPE} locale specifies the encoding of characters in
+patterns and data, that is, whether text is encoded in UTF-8, ASCII,
+or some other encoding.  @xref{Environment Variables}.
+
+In the @samp{C} or @samp{POSIX} locale, every character is encoded as
+a single byte and every byte is a valid character.  In more-complex
+encodings such as UTF-8, a sequence of multiple bytes may be needed to
+represent a character, and some bytes may be encoding errors that do
+not contribute to the representation of any character.  POSIX does not
+specify the behavior of @command{grep} when patterns or input data
+contain encoding errors or null characters, so portable scripts should
+avoid such usage.  As an extension to POSIX, GNU @command{grep} treats
+null characters like any other character.  However, unless the
+@option{-a} (@option{--binary-files=text}) option is used, the
+presence of null characters in input or of encoding errors in output
+causes GNU @command{grep} to treat the file as binary and suppress
+details about matches.  @xref{File and Directory Selection}.
+
+Regardless of locale, the 103 characters in the POSIX Portable
+Character Set (a subset of ASCII) are always encoded as a single byte,
+and the 128 ASCII characters have their usual single-byte encodings on
+all but oddball platforms.
+
+@node Matching Non-ASCII
+@section Matching Non-ASCII and Non-printable Characters
+@cindex non-ASCII matching
+@cindex non-printable matching
+
+In a regular expression, non-ASCII and non-printable characters other
+than newline are not special, and represent themselves.  For example,
+in a locale using UTF-8 the command @samp{grep 'Λ@tie{}ω'} (where the
+white space between @samp{Λ} and the @samp{ω} is a tab character)
+searches for @samp{Λ} (Unicode character U+039B GREEK CAPITAL LETTER
+LAMBDA), followed by a tab (U+0009 TAB), followed by @samp{ω} (U+03C9
+GREEK SMALL LETTER OMEGA).
+
+Suppose you want to limit your pattern to only printable characters
+(or even only printable ASCII characters) to keep your script readable
+or portable, but you also want to match specific non-ASCII or non-null
+non-printable characters.  If you are using the @option{-P}
+(@option{--perl-regexp}) option, PCREs give you several ways to do
+this.  Otherwise, if you are using Bash, the GNU project's shell, you
+can represent these characters via ANSI-C quoting.  For example, the
+Bash commands @samp{grep $'Λ\tω'} and @samp{grep $'\u039B\t\u03C9'}
+both search for the same three-character string @samp{Λ@tie{}ω}
+mentioned earlier.  However, because Bash translates ANSI-C quoting
+before @command{grep} sees the pattern, this technique should not be
+used to match printable ASCII characters; for example, @samp{grep
+$'\u005E'} is equivalent to @samp{grep '^'} and matches any line, not
+just lines containing the character @samp{^} (U+005E CIRCUMFLEX
+ACCENT).
+
+Since PCREs and ANSI-C quoting are GNU extensions to POSIX, portable
+shell scripts written in ASCII should use other methods to match
+specific non-ASCII characters.  For example, in a UTF-8 locale the
+command @samp{grep "$(printf '\316\233\t\317\211\n')"} is a portable
+albeit hard-to-read alternative to Bash's @samp{grep $'Λ\tω'}.
+However, none of these techniques will let you put a null character
+directly into a command-line pattern; null characters can appear only
+in a pattern specified via the @option{-f} (@option{--file}) option.
+
+@node Usage
+@chapter Usage
+
+@cindex usage, examples
+Here is an example command that invokes GNU @command{grep}:
+
+@example
+grep -i 'hello.*world' menu.h main.c
+@end example
+
+@noindent
+This lists all lines in the files @file{menu.h} and @file{main.c} that
+contain the string @samp{hello} followed by the string @samp{world};
+this is because @samp{.*} matches zero or more characters within a line.
+@xref{Regular Expressions}.
+The @option{-i} option causes @command{grep}
+to ignore case, causing it to match the line @samp{Hello, world!}, which
+it would not otherwise match.
+
+Here is a more complex example,
+showing the location and contents of any line
+containing @samp{f} and ending in @samp{.c},
+within all files in the current directory whose names
+start with non-@samp{.}, contain @samp{g}, and end in @samp{.h}.
+The @option{-n} option outputs line numbers, the @option{--} argument
+treats any later arguments as file names not options even if
+@code{*g*.h} expands to a file name that starts with @samp{-},
+and the empty file @file{/dev/null} causes file names to be output
+even if only one file name happens to be of the form @samp{*g*.h}.
+
+@example
+grep -n -- 'f.*\.c$' *g*.h /dev/null
+@end example
+
+@noindent
+Note that the regular expression syntax used in the pattern differs
+from the globbing syntax that the shell uses to match file names.
+
+@xref{Invoking}, for more details about
+how to invoke @command{grep}.
+
+@cindex using @command{grep}, Q&A
+@cindex FAQ about @command{grep} usage
+Here are some common questions and answers about @command{grep} usage.
+
+@enumerate
+
+@item
+How can I list just the names of matching files?
+
+@example
+grep -l 'main' test-*.c
+@end example
+
+@noindent
+lists names of @samp{test-*.c} files in the current directory whose contents
+mention @samp{main}.
+
+@item
+How do I search directories recursively?
+
+@example
+grep -r 'hello' /home/gigi
+@end example
+
+@noindent
+searches for @samp{hello} in all files
+under the @file{/home/gigi} directory.
+For more control over which files are searched,
+use @command{find} and @command{grep}.
+For example, the following command searches only C files:
+
+@example
+find /home/gigi -name '*.c' ! -type d \
+  -exec grep -H 'hello' '@{@}' +
+@end example
+
+This differs from the command:
+
+@example
+grep -H 'hello' /home/gigi/*.c
+@end example
+
+which merely looks for @samp{hello} in non-hidden C files in
+@file{/home/gigi} whose names end in @samp{.c}.
+The @command{find} command line above is more similar to the command:
+
+@example
+grep -r --include='*.c' 'hello' /home/gigi
+@end example
+
+@item
+What if a pattern or file has a leading @samp{-}?
+
+@example
+grep -- '--cut here--' *
+@end example
+
+@noindent
+searches for all lines matching @samp{--cut here--}.
+Without @option{--},
+@command{grep} would attempt to parse @samp{--cut here--} as a list of
+options, and there would be similar problems with any file names
+beginning with @samp{-}.
+
+Alternatively, you can prevent misinterpretation of leading @samp{-}
+by using @option{-e} for patterns and leading @samp{./} for files:
+
+@example
+grep -e '--cut here--' ./*
+@end example
+
+@item
+Suppose I want to search for a whole word, not a part of a word?
+
+@example
+grep -w 'hello' test*.log
+@end example
+
+@noindent
+searches only for instances of @samp{hello} that are entire words;
+it does not match @samp{Othello}.
+For more control, use @samp{\<} and
+@samp{\>} to match the start and end of words.
+For example:
+
+@example
+grep 'hello\>' test*.log
+@end example
+
+@noindent
+searches only for words ending in @samp{hello}, so it matches the word
+@samp{Othello}.
+
+@item
+How do I output context around the matching lines?
+
+@example
+grep -C 2 'hello' test*.log
+@end example
+
+@noindent
+prints two lines of context around each matching line.
+
+@item
+How do I force @command{grep} to print the name of the file?
+
+Append @file{/dev/null}:
+
+@example
+grep 'eli' /etc/passwd /dev/null
+@end example
+
+gets you:
+
+@example
+/etc/passwd:eli:x:2098:1000:Eli Smith:/home/eli:/bin/bash
+@end example
+
+Alternatively, use @option{-H}, which is a GNU extension:
+
+@example
+grep -H 'eli' /etc/passwd
+@end example
+
+@item
+Why do people use strange regular expressions on @command{ps} output?
+
+@example
+ps -ef | grep '[c]ron'
+@end example
+
+If the pattern had been written without the square brackets, it would
+have matched not only the @command{ps} output line for @command{cron},
+but also the @command{ps} output line for @command{grep}.
+Note that on some platforms,
+@command{ps} limits the output to the width of the screen;
+@command{grep} does not have any limit on the length of a line
+except the available memory.
+
+@item
+Why does @command{grep} report ``Binary file matches''?
+
+If @command{grep} listed all matching ``lines'' from a binary file, it
+would probably generate output that is not useful, and it might even
+muck up your display.
+So GNU @command{grep} suppresses output from
+files that appear to be binary files.
+To force GNU @command{grep}
+to output lines even from files that appear to be binary, use the
+@option{-a} or @samp{--binary-files=text} option.
+To eliminate the
+``Binary file matches'' messages, use the @option{-I} or
+@samp{--binary-files=without-match} option,
+or the @option{-s} or @option{--no-messages} option.
+
+@item
+Why doesn't @samp{grep -lv} print non-matching file names?
+
+@samp{grep -lv} lists the names of all files containing one or more
+lines that do not match.
+To list the names of all files that contain no
+matching lines, use the @option{-L} or @option{--files-without-match}
+option.
+
+@item
+I can do ``OR'' with @samp{|}, but what about ``AND''?
+
+@example
+grep 'paul' /etc/motd | grep 'franc,ois'
+@end example
+
+@noindent
+finds all lines that contain both @samp{paul} and @samp{franc,ois}.
+
+@item
+Why does the empty pattern match every input line?
+
+The @command{grep} command searches for lines that contain strings
+that match a pattern.  Every line contains the empty string, so an
+empty pattern causes @command{grep} to find a match on each line.  It
+is not the only such pattern: @samp{^}, @samp{$}, and many
+other patterns cause @command{grep} to match every line.
+
+To match empty lines, use the pattern @samp{^$}.  To match blank
+lines, use the pattern @samp{^[[:blank:]]*$}.  To match no lines at
+all, use the command @samp{grep -f /dev/null}.
+
+@item
+How can I search in both standard input and in files?
+
+Use the special file name @samp{-}:
+
+@example
+cat /etc/passwd | grep 'alain' - /etc/motd
+@end example
+
+@item
+Why is this back-reference failing?
+
+@example
+echo 'ba' | grep -E '(a)\1|b\1'
+@end example
+
+This outputs an error message, because the second @samp{\1}
+has nothing to refer back to, meaning it will never match anything.
+
+@item
+How can I match across lines?
+
+Standard grep cannot do this, as it is fundamentally line-based.
+Therefore, merely using the @code{[:space:]} character class does not
+match newlines in the way you might expect.
+
+With the GNU @command{grep} option @option{-z} (@option{--null-data}), each
+input and output ``line'' is null-terminated; @pxref{Other Options}.  Thus,
+you can match newlines in the input, but typically if there is a match
+the entire input is output, so this usage is often combined with
+output-suppressing options like @option{-q}, e.g.:
+
+@example
+printf 'foo\nbar\n' | grep -z -q 'foo[[:space:]]\+bar'
+@end example
+
+If this does not suffice, you can transform the input
+before giving it to @command{grep}, or turn to @command{awk},
+@command{sed}, @command{perl}, or many other utilities that are
+designed to operate across lines.
+
+@item
+What do @command{grep}, @command{fgrep}, and @command{egrep} stand for?
+
+The name @command{grep} comes from the way line editing was done on Unix.
+For example,
+@command{ed} uses the following syntax
+to print a list of matching lines on the screen:
+
+@example
+global/regular expression/print
+g/re/p
+@end example
+
+@command{fgrep} stands for Fixed @command{grep};
+@command{egrep} stands for Extended @command{grep}.
+
+@end enumerate
+
+
+@node Performance
+@chapter Performance
+
+@cindex performance
+Typically @command{grep} is an efficient way to search text.  However,
+it can be quite slow in some cases, and it can search large files
+where even minor performance tweaking can help significantly.
+Although the algorithm used by @command{grep} is an implementation
+detail that can change from release to release, understanding its
+basic strengths and weaknesses can help you improve its performance.
+
+The @command{grep} command operates partly via a set of automata that
+are designed for efficiency, and partly via a slower matcher that
+takes over when the fast matchers run into unusual features like
+back-references.  When feasible, the Boyer--Moore fast string
+searching algorithm is used to match a single fixed pattern, and the
+Aho--Corasick algorithm is used to match multiple fixed patterns.
+
+@cindex locales
+Generally speaking @command{grep} operates more efficiently in
+single-byte locales, since it can avoid the special processing needed
+for multi-byte characters.  If your patterns will work just as well
+that way, setting @env{LC_ALL} to a single-byte locale can help
+performance considerably.  Setting @samp{LC_ALL='C'} can be
+particularly efficient, as @command{grep} is tuned for that locale.
+
+@cindex case insensitive search
+Outside the @samp{C} locale, case-insensitive search, and search for
+bracket expressions like @samp{[a-z]} and @samp{[[=a=]b]}, can be
+surprisingly inefficient due to difficulties in fast portable access to
+concepts like multi-character collating elements.
+
+@cindex back-references
+A back-reference such as @samp{\1} can hurt performance significantly
+in some cases, since back-references cannot in general be implemented
+via a finite state automaton, and instead trigger a backtracking
+algorithm that can be quite inefficient.  For example, although the
+pattern @samp{^(.*)\1@{14@}(.*)\2@{13@}$} matches only lines whose
+lengths can be written as a sum @math{15x + 14y} for nonnegative
+integers @math{x} and @math{y}, the pattern matcher does not perform
+linear Diophantine analysis and instead backtracks through all
+possible matching strings, using an algorithm that is exponential in
+the worst case.
+
+@cindex holes in files
+On some operating systems that support files with holes---large
+regions of zeros that are not physically present on secondary
+storage---@command{grep} can skip over the holes efficiently without
+needing to read the zeros.  This optimization is not available if the
+@option{-a} (@option{--binary-files=text}) option is used (@pxref{File and
+Directory Selection}), unless the @option{-z} (@option{--null-data})
+option is also used (@pxref{Other Options}).
+
+For more about the algorithms used by @command{grep} and about
+related string matching algorithms, see:
+
+@frenchspacing on
+@itemize @bullet
+@item
+Aho AV. Algorithms for finding patterns in strings.
+In: van Leeuwen J. @emph{Handbook of Theoretical Computer Science}, vol. A.
+New York: Elsevier; 1990. p. 255--300.
+This surveys classic string matching algorithms, some of which are
+used by @command{grep}.
+
+@item
+Aho AV, Corasick MJ. Efficient string matching: an aid to bibliographic search.
+@emph{CACM}. 1975;18(6):333--40.
+@url{https://dx.doi.org/10.1145/360825.360855}.
+This introduces the Aho--Corasick algorithm.
+
+@item
+Boyer RS, Moore JS. A fast string searching algorithm.
+@emph{CACM}. 1977;20(10):762--72.
+@url{https://dx.doi.org/10.1145/359842.359859}.
+This introduces the Boyer--Moore algorithm.
+
+@item
+Faro S, Lecroq T. The exact online string matching problem: a review
+of the most recent results.
+@emph{ACM Comput Surv}. 2013;45(2):13.
+@url{https://dx.doi.org/10.1145/2431211.2431212}.
+This surveys string matching algorithms that might help improve the
+performance of @command{grep} in the future.
+@end itemize
+@frenchspacing off
+
+@node Reporting Bugs
+@chapter Reporting bugs
+
+@cindex bugs, reporting
+Bug reports can be found at the
+@url{https://debbugs.gnu.org/cgi/pkgreport.cgi?package=grep,
+GNU bug report logs for @command{grep}}.
+If you find a bug not listed there, please email it to
+@email{bug-grep@@gnu.org} to create a new bug report.
+
+@menu
+* Known Bugs::
+@end menu
+
+@node Known Bugs
+@section Known Bugs
+@cindex Bugs, known
+
+Large repetition counts in the @samp{@{n,m@}} construct may cause
+@command{grep} to use lots of memory.
+In addition, certain other
+obscure regular expressions require exponential time and
+space, and may cause @command{grep} to run out of memory.
+
+Back-references can greatly slow down matching, as they can generate
+exponentially many matching possibilities that can consume both time
+and memory to explore.  Also, the POSIX specification for
+back-references is at times unclear.  Furthermore, many regular
+expression implementations have back-reference bugs that can cause
+programs to return incorrect answers or even crash, and fixing these
+bugs has often been low-priority: for example, as of 2021 the
+@url{https://sourceware.org/bugzilla/,GNU C library bug database}
+contained back-reference bugs
+@url{https://sourceware.org/bugzilla/show_bug.cgi?id=52,,52},
+@url{https://sourceware.org/bugzilla/show_bug.cgi?id=10844,,10844},
+@url{https://sourceware.org/bugzilla/show_bug.cgi?id=11053,,11053},
+@url{https://sourceware.org/bugzilla/show_bug.cgi?id=24269,,24269}
+and @url{https://sourceware.org/bugzilla/show_bug.cgi?id=25322,,25322},
+with little sign of forthcoming fixes.  Luckily,
+back-references are rarely useful and it should be little trouble to
+avoid them in practical applications.
+
+
+@node Copying
+@chapter Copying
+@cindex copying
+
+GNU @command{grep} is licensed under the GNU GPL, which makes it @dfn{free
+software}.
+
+The ``free'' in ``free software'' refers to liberty, not price.  As
+some GNU project advocates like to point out, think of ``free speech''
+rather than ``free beer''.  In short, you have the right (freedom) to
+run and change @command{grep} and distribute it to other people, and---if you
+want---charge money for doing either.  The important restriction is
+that you have to grant your recipients the same rights and impose the
+same restrictions.
+
+This general method of licensing software is sometimes called
+@dfn{open source}.  The GNU project prefers the term ``free software''
+for reasons outlined at
+@url{https://www.gnu.org/philosophy/open-source-misses-the-point.html}.
+
+This manual is free documentation in the same sense.  The
+documentation license is included below.  The license for the program
+is available with the source code, or at
+@url{https://www.gnu.org/licenses/gpl.html}.
+
+@menu
+* GNU Free Documentation License::
+@end menu
+
+@node GNU Free Documentation License
+@section GNU Free Documentation License
+
+@include fdl.texi
+
+
+@node Index
+@unnumbered Index
+
+@printindex cp
+
+@bye
diff --git a/src/grep/doc/stamp-vti b/src/grep/doc/stamp-vti
new file mode 100644
index 0000000..0bb9e6b
--- /dev/null
+++ b/src/grep/doc/stamp-vti
@@ -0,0 +1,4 @@
+@set UPDATED 8 August 2021
+@set UPDATED-MONTH August 2021
+@set EDITION 3.7
+@set VERSION 3.7
diff --git a/src/grep/doc/version.texi b/src/grep/doc/version.texi
new file mode 100644
index 0000000..0bb9e6b
--- /dev/null
+++ b/src/grep/doc/version.texi
@@ -0,0 +1,4 @@
+@set UPDATED 8 August 2021
+@set UPDATED-MONTH August 2021
+@set EDITION 3.7
+@set VERSION 3.7
diff --git a/src/grep/gnulib-tests/Makefile.am b/src/grep/gnulib-tests/Makefile.am
new file mode 100644
index 0000000..3085f63
--- /dev/null
+++ b/src/grep/gnulib-tests/Makefile.am
@@ -0,0 +1,4 @@
+AM_CFLAGS =
+include gnulib.mk
+
+AM_CFLAGS += $(GNULIB_TEST_WARN_CFLAGS) $(WERROR_CFLAGS)
diff --git a/src/grep/gnulib-tests/Makefile.in b/src/grep/gnulib-tests/Makefile.in
new file mode 100644
index 0000000..2077847
--- /dev/null
+++ b/src/grep/gnulib-tests/Makefile.in
@@ -0,0 +1,7208 @@
+# Makefile.in generated by automake 1.16d from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+# Copyright (C) 2002-2021 Free Software Foundation, Inc.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This file is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this file.  If not, see <https://www.gnu.org/licenses/>.
+#
+# As a special exception to the GNU General Public License,
+# this file may be distributed as part of a program that
+# contains a configuration script generated by Autoconf, under
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+#
+# Generated by gnulib-tool.
+
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+VPATH = @srcdir@
+am__is_gnu_make = { \
+  if test -z '$(MAKELEVEL)'; then \
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+      -*I?*) strip_trailopt 'I';; \
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+      -[JT]) skip_next=yes;; \
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+am__make_dryrun = (target_option=n; $(am__make_running_with_option))
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+build_triplet = @build@
+host_triplet = @host@
+TESTS = test-accept$(EXEEXT) test-alignof$(EXEEXT) \
+	test-alloca-opt$(EXEEXT) test-argmatch$(EXEEXT) \
+	test-arpa_inet$(EXEEXT) test-binary-io.sh test-bind$(EXEEXT) \
+	test-bitrotate$(EXEEXT) test-btowc1.sh test-btowc2.sh \
+	test-c-ctype$(EXEEXT) test-c-stack.sh test-c-stack2.sh \
+	test-c-strcase.sh test-calloc-gnu$(EXEEXT) test-chdir$(EXEEXT) \
+	test-cloexec$(EXEEXT) test-close$(EXEEXT) \
+	test-connect$(EXEEXT) test-ctype$(EXEEXT) \
+	test-dfa-invalid-char-class.sh test-dfa-invalid-merge.sh \
+	test-dfa-match.sh test-dirent$(EXEEXT) test-dup$(EXEEXT) \
+	test-dup2$(EXEEXT) test-dynarray$(EXEEXT) \
+	test-environ$(EXEEXT) test-errno$(EXEEXT) test-exclude1.sh \
+	test-exclude2.sh test-exclude3.sh test-exclude4.sh \
+	test-exclude5.sh test-exclude6.sh test-exclude7.sh \
+	test-exclude8.sh test-fchdir$(EXEEXT) test-fcntl-h$(EXEEXT) \
+	test-fcntl-safer$(EXEEXT) test-fcntl$(EXEEXT) \
+	test-fdopen$(EXEEXT) test-fdopendir$(EXEEXT) \
+	test-fgetc$(EXEEXT) test-float$(EXEEXT) \
+	test-fnmatch-h$(EXEEXT) test-fnmatch$(EXEEXT) \
+	test-fopen-gnu$(EXEEXT) test-fopen$(EXEEXT) test-fpending.sh \
+	test-fputc$(EXEEXT) test-fread$(EXEEXT) test-free$(EXEEXT) \
+	test-fstat$(EXEEXT) test-fstatat$(EXEEXT) test-ftruncate.sh \
+	test-fwrite$(EXEEXT) test-getcwd-lgpl$(EXEEXT) \
+	test-getdtablesize$(EXEEXT) test-getopt-gnu$(EXEEXT) \
+	test-getopt-posix$(EXEEXT) test-getprogname$(EXEEXT) \
+	test-gettimeofday$(EXEEXT) test-hard-locale$(EXEEXT) \
+	test-hash$(EXEEXT) test-i-ring$(EXEEXT) test-iconv-h$(EXEEXT) \
+	test-iconv$(EXEEXT) test-ignore-value$(EXEEXT) \
+	test-inet_pton$(EXEEXT) test-intprops$(EXEEXT) \
+	test-inttostr$(EXEEXT) test-inttypes$(EXEEXT) \
+	test-ioctl$(EXEEXT) test-isatty$(EXEEXT) test-isblank$(EXEEXT) \
+	test-iswblank$(EXEEXT) test-iswdigit.sh test-iswxdigit.sh \
+	test-langinfo$(EXEEXT) test-limits-h$(EXEEXT) \
+	test-listen$(EXEEXT) test-locale$(EXEEXT) \
+	test-localeconv$(EXEEXT) test-localename$(EXEEXT) \
+	test-lseek.sh test-lstat$(EXEEXT) test-malloc-gnu$(EXEEXT) \
+	test-malloca$(EXEEXT) test-mbscasecmp.sh test-mbsinit.sh \
+	test-mbsrtowcs1.sh test-mbsrtowcs2.sh test-mbsrtowcs3.sh \
+	test-mbsrtowcs4.sh test-mbsstr1$(EXEEXT) test-mbsstr2.sh \
+	test-mbsstr3.sh test-memchr$(EXEEXT) test-memchr2$(EXEEXT) \
+	test-memrchr$(EXEEXT) test-nanosleep$(EXEEXT) \
+	test-netinet_in$(EXEEXT) test-nl_langinfo.sh \
+	test-nl_langinfo-mt$(EXEEXT) test-open$(EXEEXT) \
+	test-openat-safer$(EXEEXT) test-openat$(EXEEXT) \
+	test-pathmax$(EXEEXT) test-perror.sh test-perror2$(EXEEXT) \
+	test-pipe$(EXEEXT) test-pthread$(EXEEXT) \
+	test-pthread-thread$(EXEEXT) test-pthread_sigmask1$(EXEEXT) \
+	test-pthread_sigmask2$(EXEEXT) test-quotearg-simple$(EXEEXT) \
+	test-raise$(EXEEXT) test-rawmemchr$(EXEEXT) test-read$(EXEEXT) \
+	test-realloc-gnu$(EXEEXT) test-reallocarray$(EXEEXT) \
+	test-regex$(EXEEXT) test-sched$(EXEEXT) test-select$(EXEEXT) \
+	test-select-in.sh test-select-out.sh test-setenv$(EXEEXT) \
+	test-setlocale_null$(EXEEXT) \
+	test-setlocale_null-mt-one$(EXEEXT) \
+	test-setlocale_null-mt-all$(EXEEXT) test-setlocale1.sh \
+	test-setlocale2.sh test-setsockopt$(EXEEXT) \
+	test-sigaction$(EXEEXT) test-signal-h$(EXEEXT) \
+	test-sigprocmask$(EXEEXT) test-sigsegv-catch-segv1$(EXEEXT) \
+	test-sigsegv-catch-segv2$(EXEEXT) \
+	test-sigsegv-catch-stackoverflow1$(EXEEXT) \
+	test-sigsegv-catch-stackoverflow2$(EXEEXT) test-sleep$(EXEEXT) \
+	test-snprintf$(EXEEXT) test-sockets$(EXEEXT) \
+	test-stat$(EXEEXT) test-stat-time$(EXEEXT) \
+	test-stdalign$(EXEEXT) test-stdbool$(EXEEXT) \
+	test-stddef$(EXEEXT) test-stdint$(EXEEXT) test-stdio$(EXEEXT) \
+	test-stdlib$(EXEEXT) test-strerror$(EXEEXT) \
+	test-strerror_r$(EXEEXT) test-striconv$(EXEEXT) \
+	test-string$(EXEEXT) test-strnlen$(EXEEXT) \
+	test-strstr$(EXEEXT) test-strtoimax$(EXEEXT) \
+	test-strtoll$(EXEEXT) test-strtoull$(EXEEXT) \
+	test-strtoumax$(EXEEXT) test-symlink$(EXEEXT) \
+	test-sys_ioctl$(EXEEXT) test-sys_select$(EXEEXT) \
+	test-sys_socket$(EXEEXT) test-sys_stat$(EXEEXT) \
+	test-sys_time$(EXEEXT) test-sys_types$(EXEEXT) \
+	test-sys_uio$(EXEEXT) test-init.sh test-thread_self$(EXEEXT) \
+	test-thread_create$(EXEEXT) test-time$(EXEEXT) \
+	test-dup-safer$(EXEEXT) test-unistd$(EXEEXT) \
+	test-u8-mbtoucr$(EXEEXT) test-u8-uctomb$(EXEEXT) \
+	test-uc_width$(EXEEXT) uniwidth/test-uc_width2.sh \
+	test-unsetenv$(EXEEXT) test-vasnprintf$(EXEEXT) \
+	test-vc-list-files-git.sh test-vc-list-files-cvs.sh \
+	test-verify$(EXEEXT) test-verify.sh test-version-etc.sh \
+	test-wchar$(EXEEXT) test-wcrtomb.sh test-wcrtomb-w32-1.sh \
+	test-wcrtomb-w32-2.sh test-wcrtomb-w32-3.sh \
+	test-wcrtomb-w32-4.sh test-wcrtomb-w32-5.sh \
+	test-wcrtomb-w32-6.sh test-wcrtomb-w32-7.sh \
+	test-wctype-h$(EXEEXT) test-wcwidth$(EXEEXT) \
+	test-xalloc-die.sh test-xstrtoimax.sh test-xstrtol.sh
+XFAIL_TESTS =
+noinst_PROGRAMS = current-locale$(EXEEXT) test-localcharset$(EXEEXT)
+check_PROGRAMS = test-accept$(EXEEXT) test-alignof$(EXEEXT) \
+	test-alloca-opt$(EXEEXT) test-argmatch$(EXEEXT) \
+	test-arpa_inet$(EXEEXT) test-binary-io$(EXEEXT) \
+	test-bind$(EXEEXT) test-bitrotate$(EXEEXT) test-btowc$(EXEEXT) \
+	test-c-ctype$(EXEEXT) test-c-stack$(EXEEXT) \
+	test-c-strcasecmp$(EXEEXT) test-c-strncasecmp$(EXEEXT) \
+	test-calloc-gnu$(EXEEXT) test-chdir$(EXEEXT) \
+	test-cloexec$(EXEEXT) test-close$(EXEEXT) \
+	test-connect$(EXEEXT) test-ctype$(EXEEXT) \
+	test-dfa-match-aux$(EXEEXT) test-dirent$(EXEEXT) \
+	test-dup$(EXEEXT) test-dup2$(EXEEXT) test-dynarray$(EXEEXT) \
+	test-environ$(EXEEXT) test-errno$(EXEEXT) \
+	test-exclude$(EXEEXT) test-fchdir$(EXEEXT) \
+	test-fcntl-h$(EXEEXT) test-fcntl-safer$(EXEEXT) \
+	test-fcntl$(EXEEXT) test-fdopen$(EXEEXT) \
+	test-fdopendir$(EXEEXT) test-fgetc$(EXEEXT) \
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+	test-rawmemchr.c test-read.c test-realloc-gnu.c \
+	test-reallocarray.c test-regex.c test-sched.c test-select.c \
+	test-select-fd.c test-select-stdin.c test-setenv.c \
+	test-setlocale1.c test-setlocale2.c test-setlocale_null.c \
+	test-setlocale_null-mt-all.c test-setlocale_null-mt-one.c \
+	test-setsockopt.c test-sigaction.c test-signal-h.c \
+	test-sigprocmask.c test-sigsegv-catch-segv1.c \
+	test-sigsegv-catch-segv2.c test-sigsegv-catch-stackoverflow1.c \
+	test-sigsegv-catch-stackoverflow2.c test-sleep.c \
+	test-snprintf.c test-sockets.c test-stat.c test-stat-time.c \
+	test-stdalign.c test-stdbool.c test-stddef.c test-stdint.c \
+	test-stdio.c test-stdlib.c test-strerror.c test-strerror_r.c \
+	test-striconv.c test-string.c test-strnlen.c test-strstr.c \
+	test-strtoimax.c test-strtoll.c test-strtoull.c \
+	test-strtoumax.c test-symlink.c test-sys_ioctl.c \
+	test-sys_select.c test-sys_socket.c test-sys_stat.c \
+	test-sys_time.c test-sys_types.c test-sys_uio.c \
+	test-thread_create.c test-thread_self.c test-time.c \
+	$(test_u8_mbtoucr_SOURCES) $(test_u8_uctomb_SOURCES) \
+	$(test_uc_width_SOURCES) $(test_uc_width2_SOURCES) \
+	test-unistd.c test-unsetenv.c test-vasnprintf.c test-verify.c \
+	test-verify-try.c test-version-etc.c test-wchar.c \
+	test-wcrtomb.c test-wcrtomb-w32.c test-wctype-h.c \
+	test-wcwidth.c test-xalloc-die.c test-xstrtoimax.c \
+	test-xstrtol.c test-xstrtoul.c
+RECURSIVE_TARGETS = all-recursive check-recursive cscopelist-recursive \
+	ctags-recursive dvi-recursive html-recursive info-recursive \
+	install-data-recursive install-dvi-recursive \
+	install-exec-recursive install-html-recursive \
+	install-info-recursive install-pdf-recursive \
+	install-ps-recursive install-recursive installcheck-recursive \
+	installdirs-recursive pdf-recursive ps-recursive \
+	tags-recursive uninstall-recursive
+am__can_run_installinfo = \
+  case $$AM_UPDATE_INFO_DIR in \
+    n|no|NO) false;; \
+    *) (install-info --version) >/dev/null 2>&1;; \
+  esac
+HEADERS = $(noinst_HEADERS)
+RECURSIVE_CLEAN_TARGETS = mostlyclean-recursive clean-recursive	\
+  distclean-recursive maintainer-clean-recursive
+am__recursive_targets = \
+  $(RECURSIVE_TARGETS) \
+  $(RECURSIVE_CLEAN_TARGETS) \
+  $(am__extra_recursive_targets)
+AM_RECURSIVE_TARGETS = $(am__recursive_targets:-recursive=) TAGS CTAGS \
+	check recheck distdir distdir-am
+am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) $(LISP)
+# Read a list of newline-separated strings from the standard input,
+# and print each of them once, without duplicates.  Input order is
+# *not* preserved.
+am__uniquify_input = $(AWK) '\
+  BEGIN { nonempty = 0; } \
+  { items[$$0] = 1; nonempty = 1; } \
+  END { if (nonempty) { for (i in items) print i; }; } \
+'
+# Make sure the list of sources is unique.  This is necessary because,
+# e.g., the same source file might be shared among _SOURCES variables
+# for different programs/libraries.
+am__define_uniq_tagged_files = \
+  list='$(am__tagged_files)'; \
+  unique=`for i in $$list; do \
+    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+  done | $(am__uniquify_input)`
+am__tty_colors_dummy = \
+  mgn= red= grn= lgn= blu= brg= std=; \
+  am__color_tests=no
+am__tty_colors = { \
+  $(am__tty_colors_dummy); \
+  if test "X$(AM_COLOR_TESTS)" = Xno; then \
+    am__color_tests=no; \
+  elif test "X$(AM_COLOR_TESTS)" = Xalways; then \
+    am__color_tests=yes; \
+  elif test "X$$TERM" != Xdumb && { test -t 1; } 2>/dev/null; then \
+    am__color_tests=yes; \
+  fi; \
+  if test $$am__color_tests = yes; then \
+    red=''; \
+    grn=''; \
+    lgn=''; \
+    blu=''; \
+    mgn=''; \
+    brg=''; \
+    std=''; \
+  fi; \
+}
+am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
+am__vpath_adj = case $$p in \
+    $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \
+    *) f=$$p;; \
+  esac;
+am__strip_dir = f=`echo $$p | sed -e 's|^.*/||'`;
+am__install_max = 40
+am__nobase_strip_setup = \
+  srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*|]/\\\\&/g'`
+am__nobase_strip = \
+  for p in $$list; do echo "$$p"; done | sed -e "s|$$srcdirstrip/||"
+am__nobase_list = $(am__nobase_strip_setup); \
+  for p in $$list; do echo "$$p $$p"; done | \
+  sed "s| $$srcdirstrip/| |;"' / .*\//!s/ .*/ ./; s,\( .*\)/[^/]*$$,\1,' | \
+  $(AWK) 'BEGIN { files["."] = "" } { files[$$2] = files[$$2] " " $$1; \
+    if (++n[$$2] == $(am__install_max)) \
+      { print $$2, files[$$2]; n[$$2] = 0; files[$$2] = "" } } \
+    END { for (dir in files) print dir, files[dir] }'
+am__base_list = \
+  sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \
+  sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g'
+am__uninstall_files_from_dir = { \
+  test -z "$$files" \
+    || { test ! -d "$$dir" && test ! -f "$$dir" && test ! -r "$$dir"; } \
+    || { echo " ( cd '$$dir' && rm -f" $$files ")"; \
+         $(am__cd) "$$dir" && rm -f $$files; }; \
+  }
+am__recheck_rx = ^[ 	]*:recheck:[ 	]*
+am__global_test_result_rx = ^[ 	]*:global-test-result:[ 	]*
+am__copy_in_global_log_rx = ^[ 	]*:copy-in-global-log:[ 	]*
+# A command that, given a newline-separated list of test names on the
+# standard input, print the name of the tests that are to be re-run
+# upon "make recheck".
+am__list_recheck_tests = $(AWK) '{ \
+  recheck = 1; \
+  while ((rc = (getline line < ($$0 ".trs"))) != 0) \
+    { \
+      if (rc < 0) \
+        { \
+          if ((getline line2 < ($$0 ".log")) < 0) \
+	    recheck = 0; \
+          break; \
+        } \
+      else if (line ~ /$(am__recheck_rx)[nN][Oo]/) \
+        { \
+          recheck = 0; \
+          break; \
+        } \
+      else if (line ~ /$(am__recheck_rx)[yY][eE][sS]/) \
+        { \
+          break; \
+        } \
+    }; \
+  if (recheck) \
+    print $$0; \
+  close ($$0 ".trs"); \
+  close ($$0 ".log"); \
+}'
+# A command that, given a newline-separated list of test names on the
+# standard input, create the global log from their .trs and .log files.
+am__create_global_log = $(AWK) ' \
+function fatal(msg) \
+{ \
+  print "fatal: making $@: " msg | "cat >&2"; \
+  exit 1; \
+} \
+function rst_section(header) \
+{ \
+  print header; \
+  len = length(header); \
+  for (i = 1; i <= len; i = i + 1) \
+    printf "="; \
+  printf "\n\n"; \
+} \
+{ \
+  copy_in_global_log = 1; \
+  global_test_result = "RUN"; \
+  while ((rc = (getline line < ($$0 ".trs"))) != 0) \
+    { \
+      if (rc < 0) \
+         fatal("failed to read from " $$0 ".trs"); \
+      if (line ~ /$(am__global_test_result_rx)/) \
+        { \
+          sub("$(am__global_test_result_rx)", "", line); \
+          sub("[ 	]*$$", "", line); \
+          global_test_result = line; \
+        } \
+      else if (line ~ /$(am__copy_in_global_log_rx)[nN][oO]/) \
+        copy_in_global_log = 0; \
+    }; \
+  if (copy_in_global_log) \
+    { \
+      rst_section(global_test_result ": " $$0); \
+      while ((rc = (getline line < ($$0 ".log"))) != 0) \
+      { \
+        if (rc < 0) \
+          fatal("failed to read from " $$0 ".log"); \
+        print line; \
+      }; \
+      printf "\n"; \
+    }; \
+  close ($$0 ".trs"); \
+  close ($$0 ".log"); \
+}'
+# Restructured Text title.
+am__rst_title = { sed 's/.*/   &   /;h;s/./=/g;p;x;s/ *$$//;p;g' && echo; }
+# Solaris 10 'make', and several other traditional 'make' implementations,
+# pass "-e" to $(SHELL), and POSIX 2008 even requires this.  Work around it
+# by disabling -e (using the XSI extension "set +e") if it's set.
+am__sh_e_setup = case $$- in *e*) set +e;; esac
+# Default flags passed to test drivers.
+am__common_driver_flags = \
+  --color-tests "$$am__color_tests" \
+  --enable-hard-errors "$$am__enable_hard_errors" \
+  --expect-failure "$$am__expect_failure"
+# To be inserted before the command running the test.  Creates the
+# directory for the log if needed.  Stores in $dir the directory
+# containing $f, in $tst the test, in $log the log.  Executes the
+# developer- defined test setup AM_TESTS_ENVIRONMENT (if any), and
+# passes TESTS_ENVIRONMENT.  Set up options for the wrapper that
+# will run the test scripts (or their associated LOG_COMPILER, if
+# thy have one).
+am__check_pre = \
+$(am__sh_e_setup);					\
+$(am__vpath_adj_setup) $(am__vpath_adj)			\
+$(am__tty_colors);					\
+srcdir=$(srcdir); export srcdir;			\
+case "$@" in						\
+  */*) am__odir=`echo "./$@" | sed 's|/[^/]*$$||'`;;	\
+    *) am__odir=.;; 					\
+esac;							\
+test "x$$am__odir" = x"." || test -d "$$am__odir" 	\
+  || $(MKDIR_P) "$$am__odir" || exit $$?;		\
+if test -f "./$$f"; then dir=./;			\
+elif test -f "$$f"; then dir=;				\
+else dir="$(srcdir)/"; fi;				\
+tst=$$dir$$f; log='$@'; 				\
+if test -n '$(DISABLE_HARD_ERRORS)'; then		\
+  am__enable_hard_errors=no; 				\
+else							\
+  am__enable_hard_errors=yes; 				\
+fi; 							\
+case " $(XFAIL_TESTS) " in				\
+  *[\ \	]$$f[\ \	]* | *[\ \	]$$dir$$f[\ \	]*) \
+    am__expect_failure=yes;;				\
+  *)							\
+    am__expect_failure=no;;				\
+esac; 							\
+$(AM_TESTS_ENVIRONMENT) $(TESTS_ENVIRONMENT)
+# A shell command to get the names of the tests scripts with any registered
+# extension removed (i.e., equivalently, the names of the test logs, with
+# the '.log' extension removed).  The result is saved in the shell variable
+# '$bases'.  This honors runtime overriding of TESTS and TEST_LOGS.  Sadly,
+# we cannot use something simpler, involving e.g., "$(TEST_LOGS:.log=)",
+# since that might cause problem with VPATH rewrites for suffix-less tests.
+# See also 'test-harness-vpath-rewrite.sh' and 'test-trs-basic.sh'.
+am__set_TESTS_bases = \
+  bases='$(TEST_LOGS)'; \
+  bases=`for i in $$bases; do echo $$i; done | sed 's/\.log$$//'`; \
+  bases=`echo $$bases`
+AM_TESTSUITE_SUMMARY_HEADER = ' for $(PACKAGE_STRING)'
+RECHECK_LOGS = $(TEST_LOGS)
+TEST_SUITE_LOG = test-suite.log
+TEST_EXTENSIONS = @EXEEXT@ .test
+LOG_DRIVER = $(SHELL) $(top_srcdir)/build-aux/test-driver
+LOG_COMPILE = $(LOG_COMPILER) $(AM_LOG_FLAGS) $(LOG_FLAGS)
+am__set_b = \
+  case '$@' in \
+    */*) \
+      case '$*' in \
+        */*) b='$*';; \
+          *) b=`echo '$@' | sed 's/\.log$$//'`; \
+       esac;; \
+    *) \
+      b='$*';; \
+  esac
+am__test_logs1 = $(TESTS:=.log)
+am__test_logs2 = $(am__test_logs1:@EXEEXT@.log=.log)
+TEST_LOGS = $(am__test_logs2:.test.log=.log)
+TEST_LOG_DRIVER = $(SHELL) $(top_srcdir)/build-aux/test-driver
+TEST_LOG_COMPILE = $(TEST_LOG_COMPILER) $(AM_TEST_LOG_FLAGS) \
+	$(TEST_LOG_FLAGS)
+DIST_SUBDIRS = $(SUBDIRS)
+am__DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/gnulib.mk \
+	$(top_srcdir)/build-aux/depcomp \
+	$(top_srcdir)/build-aux/test-driver
+DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
+am__relativize = \
+  dir0=`pwd`; \
+  sed_first='s,^\([^/]*\)/.*$$,\1,'; \
+  sed_rest='s,^[^/]*/*,,'; \
+  sed_last='s,^.*/\([^/]*\)$$,\1,'; \
+  sed_butlast='s,/*[^/]*$$,,'; \
+  while test -n "$$dir1"; do \
+    first=`echo "$$dir1" | sed -e "$$sed_first"`; \
+    if test "$$first" != "."; then \
+      if test "$$first" = ".."; then \
+        dir2=`echo "$$dir0" | sed -e "$$sed_last"`/"$$dir2"; \
+        dir0=`echo "$$dir0" | sed -e "$$sed_butlast"`; \
+      else \
+        first2=`echo "$$dir2" | sed -e "$$sed_first"`; \
+        if test "$$first2" = "$$first"; then \
+          dir2=`echo "$$dir2" | sed -e "$$sed_rest"`; \
+        else \
+          dir2="../$$dir2"; \
+        fi; \
+        dir0="$$dir0"/"$$first"; \
+      fi; \
+    fi; \
+    dir1=`echo "$$dir1" | sed -e "$$sed_rest"`; \
+  done; \
+  reldir="$$dir2"
+pkglibexecdir = @pkglibexecdir@
+ACLOCAL = @ACLOCAL@
+ALLOCA = @ALLOCA@
+ALLOCA_H = @ALLOCA_H@
+AMTAR = @AMTAR@
+AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
+APPLE_UNIVERSAL_BUILD = @APPLE_UNIVERSAL_BUILD@
+AR = @AR@
+ARFLAGS = @ARFLAGS@
+AUTOCONF = @AUTOCONF@
+AUTOHEADER = @AUTOHEADER@
+AUTOMAKE = @AUTOMAKE@
+AWK = @AWK@
+BITSIZEOF_PTRDIFF_T = @BITSIZEOF_PTRDIFF_T@
+BITSIZEOF_SIG_ATOMIC_T = @BITSIZEOF_SIG_ATOMIC_T@
+BITSIZEOF_SIZE_T = @BITSIZEOF_SIZE_T@
+BITSIZEOF_WCHAR_T = @BITSIZEOF_WCHAR_T@
+BITSIZEOF_WINT_T = @BITSIZEOF_WINT_T@
+CC = @CC@
+CCDEPMODE = @CCDEPMODE@
+CFLAGS = @GL_CFLAG_ALLOW_WARNINGS@ @CFLAGS@
+CFLAG_VISIBILITY = @CFLAG_VISIBILITY@
+COLORIZE_SOURCE = @COLORIZE_SOURCE@
+CONFIG_INCLUDE = @CONFIG_INCLUDE@
+CPP = @CPP@
+CPPFLAGS = @CPPFLAGS@
+CSCOPE = @CSCOPE@
+CTAGS = @CTAGS@
+CYGPATH_W = @CYGPATH_W@
+DEFS = @DEFS@ -DEXEEXT=\"@EXEEXT@\"
+DEPDIR = @DEPDIR@
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+EOVERFLOW_HIDDEN = @EOVERFLOW_HIDDEN@
+EOVERFLOW_VALUE = @EOVERFLOW_VALUE@
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+ETAGS = @ETAGS@
+EXEEXT = @EXEEXT@
+FLOAT_H = @FLOAT_H@
+FNMATCH_H = @FNMATCH_H@
+GETOPT_CDEFS_H = @GETOPT_CDEFS_H@
+GETOPT_H = @GETOPT_H@
+GETTEXT_MACRO_VERSION = @GETTEXT_MACRO_VERSION@
+GL_CFLAG_ALLOW_WARNINGS = @GL_CFLAG_ALLOW_WARNINGS@
+GL_CXXFLAG_ALLOW_WARNINGS = @GL_CXXFLAG_ALLOW_WARNINGS@
+GL_GNULIB_ACCEPT = @GL_GNULIB_ACCEPT@
+GL_GNULIB_ACCEPT4 = @GL_GNULIB_ACCEPT4@
+GL_GNULIB_ACCESS = @GL_GNULIB_ACCESS@
+GL_GNULIB_ALIGNED_ALLOC = @GL_GNULIB_ALIGNED_ALLOC@
+GL_GNULIB_ALPHASORT = @GL_GNULIB_ALPHASORT@
+GL_GNULIB_ATOLL = @GL_GNULIB_ATOLL@
+GL_GNULIB_BIND = @GL_GNULIB_BIND@
+GL_GNULIB_BTOWC = @GL_GNULIB_BTOWC@
+GL_GNULIB_CALLOC_POSIX = @GL_GNULIB_CALLOC_POSIX@
+GL_GNULIB_CANONICALIZE_FILE_NAME = @GL_GNULIB_CANONICALIZE_FILE_NAME@
+GL_GNULIB_CHDIR = @GL_GNULIB_CHDIR@
+GL_GNULIB_CHOWN = @GL_GNULIB_CHOWN@
+GL_GNULIB_CLOSE = @GL_GNULIB_CLOSE@
+GL_GNULIB_CLOSEDIR = @GL_GNULIB_CLOSEDIR@
+GL_GNULIB_CONNECT = @GL_GNULIB_CONNECT@
+GL_GNULIB_COPY_FILE_RANGE = @GL_GNULIB_COPY_FILE_RANGE@
+GL_GNULIB_CREAT = @GL_GNULIB_CREAT@
+GL_GNULIB_CTIME = @GL_GNULIB_CTIME@
+GL_GNULIB_DIRFD = @GL_GNULIB_DIRFD@
+GL_GNULIB_DPRINTF = @GL_GNULIB_DPRINTF@
+GL_GNULIB_DUP = @GL_GNULIB_DUP@
+GL_GNULIB_DUP2 = @GL_GNULIB_DUP2@
+GL_GNULIB_DUP3 = @GL_GNULIB_DUP3@
+GL_GNULIB_DUPLOCALE = @GL_GNULIB_DUPLOCALE@
+GL_GNULIB_ENVIRON = @GL_GNULIB_ENVIRON@
+GL_GNULIB_EUIDACCESS = @GL_GNULIB_EUIDACCESS@
+GL_GNULIB_EXECL = @GL_GNULIB_EXECL@
+GL_GNULIB_EXECLE = @GL_GNULIB_EXECLE@
+GL_GNULIB_EXECLP = @GL_GNULIB_EXECLP@
+GL_GNULIB_EXECV = @GL_GNULIB_EXECV@
+GL_GNULIB_EXECVE = @GL_GNULIB_EXECVE@
+GL_GNULIB_EXECVP = @GL_GNULIB_EXECVP@
+GL_GNULIB_EXECVPE = @GL_GNULIB_EXECVPE@
+GL_GNULIB_EXPLICIT_BZERO = @GL_GNULIB_EXPLICIT_BZERO@
+GL_GNULIB_FACCESSAT = @GL_GNULIB_FACCESSAT@
+GL_GNULIB_FCHDIR = @GL_GNULIB_FCHDIR@
+GL_GNULIB_FCHMODAT = @GL_GNULIB_FCHMODAT@
+GL_GNULIB_FCHOWNAT = @GL_GNULIB_FCHOWNAT@
+GL_GNULIB_FCLOSE = @GL_GNULIB_FCLOSE@
+GL_GNULIB_FCNTL = @GL_GNULIB_FCNTL@
+GL_GNULIB_FDATASYNC = @GL_GNULIB_FDATASYNC@
+GL_GNULIB_FDOPEN = @GL_GNULIB_FDOPEN@
+GL_GNULIB_FDOPENDIR = @GL_GNULIB_FDOPENDIR@
+GL_GNULIB_FFLUSH = @GL_GNULIB_FFLUSH@
+GL_GNULIB_FFSL = @GL_GNULIB_FFSL@
+GL_GNULIB_FFSLL = @GL_GNULIB_FFSLL@
+GL_GNULIB_FGETC = @GL_GNULIB_FGETC@
+GL_GNULIB_FGETS = @GL_GNULIB_FGETS@
+GL_GNULIB_FNMATCH = @GL_GNULIB_FNMATCH@
+GL_GNULIB_FOPEN = @GL_GNULIB_FOPEN@
+GL_GNULIB_FPRINTF = @GL_GNULIB_FPRINTF@
+GL_GNULIB_FPRINTF_POSIX = @GL_GNULIB_FPRINTF_POSIX@
+GL_GNULIB_FPURGE = @GL_GNULIB_FPURGE@
+GL_GNULIB_FPUTC = @GL_GNULIB_FPUTC@
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+GL_GNULIB_FREAD = @GL_GNULIB_FREAD@
+GL_GNULIB_FREE_POSIX = @GL_GNULIB_FREE_POSIX@
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+GL_GNULIB_FSCANF = @GL_GNULIB_FSCANF@
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+GL_GNULIB_FSTAT = @GL_GNULIB_FSTAT@
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+GL_GNULIB_FTELLO = @GL_GNULIB_FTELLO@
+GL_GNULIB_FTRUNCATE = @GL_GNULIB_FTRUNCATE@
+GL_GNULIB_FUTIMENS = @GL_GNULIB_FUTIMENS@
+GL_GNULIB_FWRITE = @GL_GNULIB_FWRITE@
+GL_GNULIB_GETC = @GL_GNULIB_GETC@
+GL_GNULIB_GETCHAR = @GL_GNULIB_GETCHAR@
+GL_GNULIB_GETCWD = @GL_GNULIB_GETCWD@
+GL_GNULIB_GETDELIM = @GL_GNULIB_GETDELIM@
+GL_GNULIB_GETDOMAINNAME = @GL_GNULIB_GETDOMAINNAME@
+GL_GNULIB_GETDTABLESIZE = @GL_GNULIB_GETDTABLESIZE@
+GL_GNULIB_GETENTROPY = @GL_GNULIB_GETENTROPY@
+GL_GNULIB_GETGROUPS = @GL_GNULIB_GETGROUPS@
+GL_GNULIB_GETHOSTNAME = @GL_GNULIB_GETHOSTNAME@
+GL_GNULIB_GETLINE = @GL_GNULIB_GETLINE@
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+GL_GNULIB_GETLOGIN = @GL_GNULIB_GETLOGIN@
+GL_GNULIB_GETLOGIN_R = @GL_GNULIB_GETLOGIN_R@
+GL_GNULIB_GETOPT_POSIX = @GL_GNULIB_GETOPT_POSIX@
+GL_GNULIB_GETPAGESIZE = @GL_GNULIB_GETPAGESIZE@
+GL_GNULIB_GETPASS = @GL_GNULIB_GETPASS@
+GL_GNULIB_GETPEERNAME = @GL_GNULIB_GETPEERNAME@
+GL_GNULIB_GETSOCKNAME = @GL_GNULIB_GETSOCKNAME@
+GL_GNULIB_GETSOCKOPT = @GL_GNULIB_GETSOCKOPT@
+GL_GNULIB_GETSUBOPT = @GL_GNULIB_GETSUBOPT@
+GL_GNULIB_GETTIMEOFDAY = @GL_GNULIB_GETTIMEOFDAY@
+GL_GNULIB_GETUMASK = @GL_GNULIB_GETUMASK@
+GL_GNULIB_GETUSERSHELL = @GL_GNULIB_GETUSERSHELL@
+GL_GNULIB_GRANTPT = @GL_GNULIB_GRANTPT@
+GL_GNULIB_GROUP_MEMBER = @GL_GNULIB_GROUP_MEMBER@
+GL_GNULIB_ICONV = @GL_GNULIB_ICONV@
+GL_GNULIB_IMAXABS = @GL_GNULIB_IMAXABS@
+GL_GNULIB_IMAXDIV = @GL_GNULIB_IMAXDIV@
+GL_GNULIB_INET_NTOP = @GL_GNULIB_INET_NTOP@
+GL_GNULIB_INET_PTON = @GL_GNULIB_INET_PTON@
+GL_GNULIB_IOCTL = @GL_GNULIB_IOCTL@
+GL_GNULIB_ISATTY = @GL_GNULIB_ISATTY@
+GL_GNULIB_ISBLANK = @GL_GNULIB_ISBLANK@
+GL_GNULIB_ISWBLANK = @GL_GNULIB_ISWBLANK@
+GL_GNULIB_ISWCTYPE = @GL_GNULIB_ISWCTYPE@
+GL_GNULIB_ISWDIGIT = @GL_GNULIB_ISWDIGIT@
+GL_GNULIB_ISWXDIGIT = @GL_GNULIB_ISWXDIGIT@
+GL_GNULIB_LCHMOD = @GL_GNULIB_LCHMOD@
+GL_GNULIB_LCHOWN = @GL_GNULIB_LCHOWN@
+GL_GNULIB_LINK = @GL_GNULIB_LINK@
+GL_GNULIB_LINKAT = @GL_GNULIB_LINKAT@
+GL_GNULIB_LISTEN = @GL_GNULIB_LISTEN@
+GL_GNULIB_LOCALECONV = @GL_GNULIB_LOCALECONV@
+GL_GNULIB_LOCALENAME = @GL_GNULIB_LOCALENAME@
+GL_GNULIB_LOCALTIME = @GL_GNULIB_LOCALTIME@
+GL_GNULIB_LSEEK = @GL_GNULIB_LSEEK@
+GL_GNULIB_LSTAT = @GL_GNULIB_LSTAT@
+GL_GNULIB_MALLOC_POSIX = @GL_GNULIB_MALLOC_POSIX@
+GL_GNULIB_MBRLEN = @GL_GNULIB_MBRLEN@
+GL_GNULIB_MBRTOWC = @GL_GNULIB_MBRTOWC@
+GL_GNULIB_MBSCASECMP = @GL_GNULIB_MBSCASECMP@
+GL_GNULIB_MBSCASESTR = @GL_GNULIB_MBSCASESTR@
+GL_GNULIB_MBSCHR = @GL_GNULIB_MBSCHR@
+GL_GNULIB_MBSCSPN = @GL_GNULIB_MBSCSPN@
+GL_GNULIB_MBSINIT = @GL_GNULIB_MBSINIT@
+GL_GNULIB_MBSLEN = @GL_GNULIB_MBSLEN@
+GL_GNULIB_MBSNCASECMP = @GL_GNULIB_MBSNCASECMP@
+GL_GNULIB_MBSNLEN = @GL_GNULIB_MBSNLEN@
+GL_GNULIB_MBSNRTOWCS = @GL_GNULIB_MBSNRTOWCS@
+GL_GNULIB_MBSPBRK = @GL_GNULIB_MBSPBRK@
+GL_GNULIB_MBSPCASECMP = @GL_GNULIB_MBSPCASECMP@
+GL_GNULIB_MBSRCHR = @GL_GNULIB_MBSRCHR@
+GL_GNULIB_MBSRTOWCS = @GL_GNULIB_MBSRTOWCS@
+GL_GNULIB_MBSSEP = @GL_GNULIB_MBSSEP@
+GL_GNULIB_MBSSPN = @GL_GNULIB_MBSSPN@
+GL_GNULIB_MBSSTR = @GL_GNULIB_MBSSTR@
+GL_GNULIB_MBSTOK_R = @GL_GNULIB_MBSTOK_R@
+GL_GNULIB_MBTOWC = @GL_GNULIB_MBTOWC@
+GL_GNULIB_MDA_ACCESS = @GL_GNULIB_MDA_ACCESS@
+GL_GNULIB_MDA_CHDIR = @GL_GNULIB_MDA_CHDIR@
+GL_GNULIB_MDA_CHMOD = @GL_GNULIB_MDA_CHMOD@
+GL_GNULIB_MDA_CLOSE = @GL_GNULIB_MDA_CLOSE@
+GL_GNULIB_MDA_CREAT = @GL_GNULIB_MDA_CREAT@
+GL_GNULIB_MDA_DUP = @GL_GNULIB_MDA_DUP@
+GL_GNULIB_MDA_DUP2 = @GL_GNULIB_MDA_DUP2@
+GL_GNULIB_MDA_ECVT = @GL_GNULIB_MDA_ECVT@
+GL_GNULIB_MDA_EXECL = @GL_GNULIB_MDA_EXECL@
+GL_GNULIB_MDA_EXECLE = @GL_GNULIB_MDA_EXECLE@
+GL_GNULIB_MDA_EXECLP = @GL_GNULIB_MDA_EXECLP@
+GL_GNULIB_MDA_EXECV = @GL_GNULIB_MDA_EXECV@
+GL_GNULIB_MDA_EXECVE = @GL_GNULIB_MDA_EXECVE@
+GL_GNULIB_MDA_EXECVP = @GL_GNULIB_MDA_EXECVP@
+GL_GNULIB_MDA_EXECVPE = @GL_GNULIB_MDA_EXECVPE@
+GL_GNULIB_MDA_FCLOSEALL = @GL_GNULIB_MDA_FCLOSEALL@
+GL_GNULIB_MDA_FCVT = @GL_GNULIB_MDA_FCVT@
+GL_GNULIB_MDA_FDOPEN = @GL_GNULIB_MDA_FDOPEN@
+GL_GNULIB_MDA_FILENO = @GL_GNULIB_MDA_FILENO@
+GL_GNULIB_MDA_GCVT = @GL_GNULIB_MDA_GCVT@
+GL_GNULIB_MDA_GETCWD = @GL_GNULIB_MDA_GETCWD@
+GL_GNULIB_MDA_GETPID = @GL_GNULIB_MDA_GETPID@
+GL_GNULIB_MDA_GETW = @GL_GNULIB_MDA_GETW@
+GL_GNULIB_MDA_ISATTY = @GL_GNULIB_MDA_ISATTY@
+GL_GNULIB_MDA_LSEEK = @GL_GNULIB_MDA_LSEEK@
+GL_GNULIB_MDA_MEMCCPY = @GL_GNULIB_MDA_MEMCCPY@
+GL_GNULIB_MDA_MKDIR = @GL_GNULIB_MDA_MKDIR@
+GL_GNULIB_MDA_MKTEMP = @GL_GNULIB_MDA_MKTEMP@
+GL_GNULIB_MDA_OPEN = @GL_GNULIB_MDA_OPEN@
+GL_GNULIB_MDA_PUTENV = @GL_GNULIB_MDA_PUTENV@
+GL_GNULIB_MDA_PUTW = @GL_GNULIB_MDA_PUTW@
+GL_GNULIB_MDA_READ = @GL_GNULIB_MDA_READ@
+GL_GNULIB_MDA_RMDIR = @GL_GNULIB_MDA_RMDIR@
+GL_GNULIB_MDA_STRDUP = @GL_GNULIB_MDA_STRDUP@
+GL_GNULIB_MDA_SWAB = @GL_GNULIB_MDA_SWAB@
+GL_GNULIB_MDA_TEMPNAM = @GL_GNULIB_MDA_TEMPNAM@
+GL_GNULIB_MDA_TZSET = @GL_GNULIB_MDA_TZSET@
+GL_GNULIB_MDA_UMASK = @GL_GNULIB_MDA_UMASK@
+GL_GNULIB_MDA_UNLINK = @GL_GNULIB_MDA_UNLINK@
+GL_GNULIB_MDA_WCSDUP = @GL_GNULIB_MDA_WCSDUP@
+GL_GNULIB_MDA_WRITE = @GL_GNULIB_MDA_WRITE@
+GL_GNULIB_MEMCHR = @GL_GNULIB_MEMCHR@
+GL_GNULIB_MEMMEM = @GL_GNULIB_MEMMEM@
+GL_GNULIB_MEMPCPY = @GL_GNULIB_MEMPCPY@
+GL_GNULIB_MEMRCHR = @GL_GNULIB_MEMRCHR@
+GL_GNULIB_MKDIR = @GL_GNULIB_MKDIR@
+GL_GNULIB_MKDIRAT = @GL_GNULIB_MKDIRAT@
+GL_GNULIB_MKDTEMP = @GL_GNULIB_MKDTEMP@
+GL_GNULIB_MKFIFO = @GL_GNULIB_MKFIFO@
+GL_GNULIB_MKFIFOAT = @GL_GNULIB_MKFIFOAT@
+GL_GNULIB_MKNOD = @GL_GNULIB_MKNOD@
+GL_GNULIB_MKNODAT = @GL_GNULIB_MKNODAT@
+GL_GNULIB_MKOSTEMP = @GL_GNULIB_MKOSTEMP@
+GL_GNULIB_MKOSTEMPS = @GL_GNULIB_MKOSTEMPS@
+GL_GNULIB_MKSTEMP = @GL_GNULIB_MKSTEMP@
+GL_GNULIB_MKSTEMPS = @GL_GNULIB_MKSTEMPS@
+GL_GNULIB_MKTIME = @GL_GNULIB_MKTIME@
+GL_GNULIB_NANOSLEEP = @GL_GNULIB_NANOSLEEP@
+GL_GNULIB_NL_LANGINFO = @GL_GNULIB_NL_LANGINFO@
+GL_GNULIB_NONBLOCKING = @GL_GNULIB_NONBLOCKING@
+GL_GNULIB_OBSTACK_PRINTF = @GL_GNULIB_OBSTACK_PRINTF@
+GL_GNULIB_OBSTACK_PRINTF_POSIX = @GL_GNULIB_OBSTACK_PRINTF_POSIX@
+GL_GNULIB_OPEN = @GL_GNULIB_OPEN@
+GL_GNULIB_OPENAT = @GL_GNULIB_OPENAT@
+GL_GNULIB_OPENDIR = @GL_GNULIB_OPENDIR@
+GL_GNULIB_OVERRIDES_STRUCT_STAT = @GL_GNULIB_OVERRIDES_STRUCT_STAT@
+GL_GNULIB_PCLOSE = @GL_GNULIB_PCLOSE@
+GL_GNULIB_PERROR = @GL_GNULIB_PERROR@
+GL_GNULIB_PIPE = @GL_GNULIB_PIPE@
+GL_GNULIB_PIPE2 = @GL_GNULIB_PIPE2@
+GL_GNULIB_POPEN = @GL_GNULIB_POPEN@
+GL_GNULIB_POSIX_MEMALIGN = @GL_GNULIB_POSIX_MEMALIGN@
+GL_GNULIB_POSIX_OPENPT = @GL_GNULIB_POSIX_OPENPT@
+GL_GNULIB_PREAD = @GL_GNULIB_PREAD@
+GL_GNULIB_PRINTF = @GL_GNULIB_PRINTF@
+GL_GNULIB_PRINTF_POSIX = @GL_GNULIB_PRINTF_POSIX@
+GL_GNULIB_PSELECT = @GL_GNULIB_PSELECT@
+GL_GNULIB_PTHREAD_COND = @GL_GNULIB_PTHREAD_COND@
+GL_GNULIB_PTHREAD_MUTEX = @GL_GNULIB_PTHREAD_MUTEX@
+GL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK = @GL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK@
+GL_GNULIB_PTHREAD_ONCE = @GL_GNULIB_PTHREAD_ONCE@
+GL_GNULIB_PTHREAD_RWLOCK = @GL_GNULIB_PTHREAD_RWLOCK@
+GL_GNULIB_PTHREAD_SIGMASK = @GL_GNULIB_PTHREAD_SIGMASK@
+GL_GNULIB_PTHREAD_SPIN = @GL_GNULIB_PTHREAD_SPIN@
+GL_GNULIB_PTHREAD_THREAD = @GL_GNULIB_PTHREAD_THREAD@
+GL_GNULIB_PTHREAD_TSS = @GL_GNULIB_PTHREAD_TSS@
+GL_GNULIB_PTSNAME = @GL_GNULIB_PTSNAME@
+GL_GNULIB_PTSNAME_R = @GL_GNULIB_PTSNAME_R@
+GL_GNULIB_PUTC = @GL_GNULIB_PUTC@
+GL_GNULIB_PUTCHAR = @GL_GNULIB_PUTCHAR@
+GL_GNULIB_PUTENV = @GL_GNULIB_PUTENV@
+GL_GNULIB_PUTS = @GL_GNULIB_PUTS@
+GL_GNULIB_PWRITE = @GL_GNULIB_PWRITE@
+GL_GNULIB_QSORT_R = @GL_GNULIB_QSORT_R@
+GL_GNULIB_RAISE = @GL_GNULIB_RAISE@
+GL_GNULIB_RANDOM = @GL_GNULIB_RANDOM@
+GL_GNULIB_RANDOM_R = @GL_GNULIB_RANDOM_R@
+GL_GNULIB_RAWMEMCHR = @GL_GNULIB_RAWMEMCHR@
+GL_GNULIB_READ = @GL_GNULIB_READ@
+GL_GNULIB_READDIR = @GL_GNULIB_READDIR@
+GL_GNULIB_READLINK = @GL_GNULIB_READLINK@
+GL_GNULIB_READLINKAT = @GL_GNULIB_READLINKAT@
+GL_GNULIB_REALLOCARRAY = @GL_GNULIB_REALLOCARRAY@
+GL_GNULIB_REALLOC_POSIX = @GL_GNULIB_REALLOC_POSIX@
+GL_GNULIB_REALPATH = @GL_GNULIB_REALPATH@
+GL_GNULIB_RECV = @GL_GNULIB_RECV@
+GL_GNULIB_RECVFROM = @GL_GNULIB_RECVFROM@
+GL_GNULIB_REMOVE = @GL_GNULIB_REMOVE@
+GL_GNULIB_RENAME = @GL_GNULIB_RENAME@
+GL_GNULIB_RENAMEAT = @GL_GNULIB_RENAMEAT@
+GL_GNULIB_REWINDDIR = @GL_GNULIB_REWINDDIR@
+GL_GNULIB_RMDIR = @GL_GNULIB_RMDIR@
+GL_GNULIB_RPMATCH = @GL_GNULIB_RPMATCH@
+GL_GNULIB_SCANDIR = @GL_GNULIB_SCANDIR@
+GL_GNULIB_SCANF = @GL_GNULIB_SCANF@
+GL_GNULIB_SCHED_YIELD = @GL_GNULIB_SCHED_YIELD@
+GL_GNULIB_SECURE_GETENV = @GL_GNULIB_SECURE_GETENV@
+GL_GNULIB_SELECT = @GL_GNULIB_SELECT@
+GL_GNULIB_SEND = @GL_GNULIB_SEND@
+GL_GNULIB_SENDTO = @GL_GNULIB_SENDTO@
+GL_GNULIB_SETENV = @GL_GNULIB_SETENV@
+GL_GNULIB_SETHOSTNAME = @GL_GNULIB_SETHOSTNAME@
+GL_GNULIB_SETLOCALE = @GL_GNULIB_SETLOCALE@
+GL_GNULIB_SETLOCALE_NULL = @GL_GNULIB_SETLOCALE_NULL@
+GL_GNULIB_SETSOCKOPT = @GL_GNULIB_SETSOCKOPT@
+GL_GNULIB_SHUTDOWN = @GL_GNULIB_SHUTDOWN@
+GL_GNULIB_SIGABBREV_NP = @GL_GNULIB_SIGABBREV_NP@
+GL_GNULIB_SIGACTION = @GL_GNULIB_SIGACTION@
+GL_GNULIB_SIGDESCR_NP = @GL_GNULIB_SIGDESCR_NP@
+GL_GNULIB_SIGNAL_H_SIGPIPE = @GL_GNULIB_SIGNAL_H_SIGPIPE@
+GL_GNULIB_SIGPROCMASK = @GL_GNULIB_SIGPROCMASK@
+GL_GNULIB_SLEEP = @GL_GNULIB_SLEEP@
+GL_GNULIB_SNPRINTF = @GL_GNULIB_SNPRINTF@
+GL_GNULIB_SOCKET = @GL_GNULIB_SOCKET@
+GL_GNULIB_SPRINTF_POSIX = @GL_GNULIB_SPRINTF_POSIX@
+GL_GNULIB_STAT = @GL_GNULIB_STAT@
+GL_GNULIB_STDIO_H_NONBLOCKING = @GL_GNULIB_STDIO_H_NONBLOCKING@
+GL_GNULIB_STDIO_H_SIGPIPE = @GL_GNULIB_STDIO_H_SIGPIPE@
+GL_GNULIB_STPCPY = @GL_GNULIB_STPCPY@
+GL_GNULIB_STPNCPY = @GL_GNULIB_STPNCPY@
+GL_GNULIB_STRCASESTR = @GL_GNULIB_STRCASESTR@
+GL_GNULIB_STRCHRNUL = @GL_GNULIB_STRCHRNUL@
+GL_GNULIB_STRDUP = @GL_GNULIB_STRDUP@
+GL_GNULIB_STRERROR = @GL_GNULIB_STRERROR@
+GL_GNULIB_STRERRORNAME_NP = @GL_GNULIB_STRERRORNAME_NP@
+GL_GNULIB_STRERROR_R = @GL_GNULIB_STRERROR_R@
+GL_GNULIB_STRFTIME = @GL_GNULIB_STRFTIME@
+GL_GNULIB_STRNCAT = @GL_GNULIB_STRNCAT@
+GL_GNULIB_STRNDUP = @GL_GNULIB_STRNDUP@
+GL_GNULIB_STRNLEN = @GL_GNULIB_STRNLEN@
+GL_GNULIB_STRPBRK = @GL_GNULIB_STRPBRK@
+GL_GNULIB_STRPTIME = @GL_GNULIB_STRPTIME@
+GL_GNULIB_STRSEP = @GL_GNULIB_STRSEP@
+GL_GNULIB_STRSIGNAL = @GL_GNULIB_STRSIGNAL@
+GL_GNULIB_STRSTR = @GL_GNULIB_STRSTR@
+GL_GNULIB_STRTOD = @GL_GNULIB_STRTOD@
+GL_GNULIB_STRTOIMAX = @GL_GNULIB_STRTOIMAX@
+GL_GNULIB_STRTOK_R = @GL_GNULIB_STRTOK_R@
+GL_GNULIB_STRTOL = @GL_GNULIB_STRTOL@
+GL_GNULIB_STRTOLD = @GL_GNULIB_STRTOLD@
+GL_GNULIB_STRTOLL = @GL_GNULIB_STRTOLL@
+GL_GNULIB_STRTOUL = @GL_GNULIB_STRTOUL@
+GL_GNULIB_STRTOULL = @GL_GNULIB_STRTOULL@
+GL_GNULIB_STRTOUMAX = @GL_GNULIB_STRTOUMAX@
+GL_GNULIB_STRVERSCMP = @GL_GNULIB_STRVERSCMP@
+GL_GNULIB_SYMLINK = @GL_GNULIB_SYMLINK@
+GL_GNULIB_SYMLINKAT = @GL_GNULIB_SYMLINKAT@
+GL_GNULIB_SYSTEM_POSIX = @GL_GNULIB_SYSTEM_POSIX@
+GL_GNULIB_TIMEGM = @GL_GNULIB_TIMEGM@
+GL_GNULIB_TIMESPEC_GET = @GL_GNULIB_TIMESPEC_GET@
+GL_GNULIB_TIME_R = @GL_GNULIB_TIME_R@
+GL_GNULIB_TIME_RZ = @GL_GNULIB_TIME_RZ@
+GL_GNULIB_TMPFILE = @GL_GNULIB_TMPFILE@
+GL_GNULIB_TOWCTRANS = @GL_GNULIB_TOWCTRANS@
+GL_GNULIB_TRUNCATE = @GL_GNULIB_TRUNCATE@
+GL_GNULIB_TTYNAME_R = @GL_GNULIB_TTYNAME_R@
+GL_GNULIB_TZSET = @GL_GNULIB_TZSET@
+GL_GNULIB_UNISTD_H_GETOPT = @GL_GNULIB_UNISTD_H_GETOPT@
+GL_GNULIB_UNISTD_H_NONBLOCKING = @GL_GNULIB_UNISTD_H_NONBLOCKING@
+GL_GNULIB_UNISTD_H_SIGPIPE = @GL_GNULIB_UNISTD_H_SIGPIPE@
+GL_GNULIB_UNLINK = @GL_GNULIB_UNLINK@
+GL_GNULIB_UNLINKAT = @GL_GNULIB_UNLINKAT@
+GL_GNULIB_UNLOCKPT = @GL_GNULIB_UNLOCKPT@
+GL_GNULIB_UNSETENV = @GL_GNULIB_UNSETENV@
+GL_GNULIB_USLEEP = @GL_GNULIB_USLEEP@
+GL_GNULIB_UTIMENSAT = @GL_GNULIB_UTIMENSAT@
+GL_GNULIB_VASPRINTF = @GL_GNULIB_VASPRINTF@
+GL_GNULIB_VDPRINTF = @GL_GNULIB_VDPRINTF@
+GL_GNULIB_VFPRINTF = @GL_GNULIB_VFPRINTF@
+GL_GNULIB_VFPRINTF_POSIX = @GL_GNULIB_VFPRINTF_POSIX@
+GL_GNULIB_VFSCANF = @GL_GNULIB_VFSCANF@
+GL_GNULIB_VPRINTF = @GL_GNULIB_VPRINTF@
+GL_GNULIB_VPRINTF_POSIX = @GL_GNULIB_VPRINTF_POSIX@
+GL_GNULIB_VSCANF = @GL_GNULIB_VSCANF@
+GL_GNULIB_VSNPRINTF = @GL_GNULIB_VSNPRINTF@
+GL_GNULIB_VSPRINTF_POSIX = @GL_GNULIB_VSPRINTF_POSIX@
+GL_GNULIB_WCPCPY = @GL_GNULIB_WCPCPY@
+GL_GNULIB_WCPNCPY = @GL_GNULIB_WCPNCPY@
+GL_GNULIB_WCRTOMB = @GL_GNULIB_WCRTOMB@
+GL_GNULIB_WCSCASECMP = @GL_GNULIB_WCSCASECMP@
+GL_GNULIB_WCSCAT = @GL_GNULIB_WCSCAT@
+GL_GNULIB_WCSCHR = @GL_GNULIB_WCSCHR@
+GL_GNULIB_WCSCMP = @GL_GNULIB_WCSCMP@
+GL_GNULIB_WCSCOLL = @GL_GNULIB_WCSCOLL@
+GL_GNULIB_WCSCPY = @GL_GNULIB_WCSCPY@
+GL_GNULIB_WCSCSPN = @GL_GNULIB_WCSCSPN@
+GL_GNULIB_WCSDUP = @GL_GNULIB_WCSDUP@
+GL_GNULIB_WCSFTIME = @GL_GNULIB_WCSFTIME@
+GL_GNULIB_WCSLEN = @GL_GNULIB_WCSLEN@
+GL_GNULIB_WCSNCASECMP = @GL_GNULIB_WCSNCASECMP@
+GL_GNULIB_WCSNCAT = @GL_GNULIB_WCSNCAT@
+GL_GNULIB_WCSNCMP = @GL_GNULIB_WCSNCMP@
+GL_GNULIB_WCSNCPY = @GL_GNULIB_WCSNCPY@
+GL_GNULIB_WCSNLEN = @GL_GNULIB_WCSNLEN@
+GL_GNULIB_WCSNRTOMBS = @GL_GNULIB_WCSNRTOMBS@
+GL_GNULIB_WCSPBRK = @GL_GNULIB_WCSPBRK@
+GL_GNULIB_WCSRCHR = @GL_GNULIB_WCSRCHR@
+GL_GNULIB_WCSRTOMBS = @GL_GNULIB_WCSRTOMBS@
+GL_GNULIB_WCSSPN = @GL_GNULIB_WCSSPN@
+GL_GNULIB_WCSSTR = @GL_GNULIB_WCSSTR@
+GL_GNULIB_WCSTOK = @GL_GNULIB_WCSTOK@
+GL_GNULIB_WCSWIDTH = @GL_GNULIB_WCSWIDTH@
+GL_GNULIB_WCSXFRM = @GL_GNULIB_WCSXFRM@
+GL_GNULIB_WCTOB = @GL_GNULIB_WCTOB@
+GL_GNULIB_WCTOMB = @GL_GNULIB_WCTOMB@
+GL_GNULIB_WCTRANS = @GL_GNULIB_WCTRANS@
+GL_GNULIB_WCTYPE = @GL_GNULIB_WCTYPE@
+GL_GNULIB_WCWIDTH = @GL_GNULIB_WCWIDTH@
+GL_GNULIB_WMEMCHR = @GL_GNULIB_WMEMCHR@
+GL_GNULIB_WMEMCMP = @GL_GNULIB_WMEMCMP@
+GL_GNULIB_WMEMCPY = @GL_GNULIB_WMEMCPY@
+GL_GNULIB_WMEMMOVE = @GL_GNULIB_WMEMMOVE@
+GL_GNULIB_WMEMPCPY = @GL_GNULIB_WMEMPCPY@
+GL_GNULIB_WMEMSET = @GL_GNULIB_WMEMSET@
+GL_GNULIB_WRITE = @GL_GNULIB_WRITE@
+GL_GNULIB__EXIT = @GL_GNULIB__EXIT@
+GMSGFMT = @GMSGFMT@
+GMSGFMT_015 = @GMSGFMT_015@
+GNULIBHEADERS_OVERRIDE_WINT_T = @GNULIBHEADERS_OVERRIDE_WINT_T@
+GNULIB_GETTIMEOFDAY = @GNULIB_GETTIMEOFDAY@
+GNULIB_TEST_WARN_CFLAGS = @GNULIB_TEST_WARN_CFLAGS@
+GNULIB_WARN_CFLAGS = @GNULIB_WARN_CFLAGS@
+GREP = @GREP@
+HAVE_ACCEPT4 = @HAVE_ACCEPT4@
+HAVE_ALIGNED_ALLOC = @HAVE_ALIGNED_ALLOC@
+HAVE_ALLOCA_H = @HAVE_ALLOCA_H@
+HAVE_ALPHASORT = @HAVE_ALPHASORT@
+HAVE_ARPA_INET_H = @HAVE_ARPA_INET_H@
+HAVE_ATOLL = @HAVE_ATOLL@
+HAVE_BTOWC = @HAVE_BTOWC@
+HAVE_C99_STDINT_H = @HAVE_C99_STDINT_H@
+HAVE_CANONICALIZE_FILE_NAME = @HAVE_CANONICALIZE_FILE_NAME@
+HAVE_CHOWN = @HAVE_CHOWN@
+HAVE_CLOSEDIR = @HAVE_CLOSEDIR@
+HAVE_COPY_FILE_RANGE = @HAVE_COPY_FILE_RANGE@
+HAVE_CRTDEFS_H = @HAVE_CRTDEFS_H@
+HAVE_DECL_DIRFD = @HAVE_DECL_DIRFD@
+HAVE_DECL_ECVT = @HAVE_DECL_ECVT@
+HAVE_DECL_ENVIRON = @HAVE_DECL_ENVIRON@
+HAVE_DECL_EXECVPE = @HAVE_DECL_EXECVPE@
+HAVE_DECL_FCHDIR = @HAVE_DECL_FCHDIR@
+HAVE_DECL_FCLOSEALL = @HAVE_DECL_FCLOSEALL@
+HAVE_DECL_FCVT = @HAVE_DECL_FCVT@
+HAVE_DECL_FDATASYNC = @HAVE_DECL_FDATASYNC@
+HAVE_DECL_FDOPENDIR = @HAVE_DECL_FDOPENDIR@
+HAVE_DECL_FPURGE = @HAVE_DECL_FPURGE@
+HAVE_DECL_FSEEKO = @HAVE_DECL_FSEEKO@
+HAVE_DECL_FTELLO = @HAVE_DECL_FTELLO@
+HAVE_DECL_GCVT = @HAVE_DECL_GCVT@
+HAVE_DECL_GETDELIM = @HAVE_DECL_GETDELIM@
+HAVE_DECL_GETDOMAINNAME = @HAVE_DECL_GETDOMAINNAME@
+HAVE_DECL_GETLINE = @HAVE_DECL_GETLINE@
+HAVE_DECL_GETLOADAVG = @HAVE_DECL_GETLOADAVG@
+HAVE_DECL_GETLOGIN = @HAVE_DECL_GETLOGIN@
+HAVE_DECL_GETLOGIN_R = @HAVE_DECL_GETLOGIN_R@
+HAVE_DECL_GETPAGESIZE = @HAVE_DECL_GETPAGESIZE@
+HAVE_DECL_GETUSERSHELL = @HAVE_DECL_GETUSERSHELL@
+HAVE_DECL_IMAXABS = @HAVE_DECL_IMAXABS@
+HAVE_DECL_IMAXDIV = @HAVE_DECL_IMAXDIV@
+HAVE_DECL_INET_NTOP = @HAVE_DECL_INET_NTOP@
+HAVE_DECL_INET_PTON = @HAVE_DECL_INET_PTON@
+HAVE_DECL_INITSTATE = @HAVE_DECL_INITSTATE@
+HAVE_DECL_LOCALTIME_R = @HAVE_DECL_LOCALTIME_R@
+HAVE_DECL_MEMMEM = @HAVE_DECL_MEMMEM@
+HAVE_DECL_MEMRCHR = @HAVE_DECL_MEMRCHR@
+HAVE_DECL_OBSTACK_PRINTF = @HAVE_DECL_OBSTACK_PRINTF@
+HAVE_DECL_SETENV = @HAVE_DECL_SETENV@
+HAVE_DECL_SETHOSTNAME = @HAVE_DECL_SETHOSTNAME@
+HAVE_DECL_SETSTATE = @HAVE_DECL_SETSTATE@
+HAVE_DECL_SNPRINTF = @HAVE_DECL_SNPRINTF@
+HAVE_DECL_STRDUP = @HAVE_DECL_STRDUP@
+HAVE_DECL_STRERROR_R = @HAVE_DECL_STRERROR_R@
+HAVE_DECL_STRNDUP = @HAVE_DECL_STRNDUP@
+HAVE_DECL_STRNLEN = @HAVE_DECL_STRNLEN@
+HAVE_DECL_STRSIGNAL = @HAVE_DECL_STRSIGNAL@
+HAVE_DECL_STRTOIMAX = @HAVE_DECL_STRTOIMAX@
+HAVE_DECL_STRTOK_R = @HAVE_DECL_STRTOK_R@
+HAVE_DECL_STRTOUMAX = @HAVE_DECL_STRTOUMAX@
+HAVE_DECL_TRUNCATE = @HAVE_DECL_TRUNCATE@
+HAVE_DECL_TTYNAME_R = @HAVE_DECL_TTYNAME_R@
+HAVE_DECL_UNSETENV = @HAVE_DECL_UNSETENV@
+HAVE_DECL_VSNPRINTF = @HAVE_DECL_VSNPRINTF@
+HAVE_DECL_WCSDUP = @HAVE_DECL_WCSDUP@
+HAVE_DECL_WCTOB = @HAVE_DECL_WCTOB@
+HAVE_DECL_WCWIDTH = @HAVE_DECL_WCWIDTH@
+HAVE_DIRENT_H = @HAVE_DIRENT_H@
+HAVE_DPRINTF = @HAVE_DPRINTF@
+HAVE_DUP3 = @HAVE_DUP3@
+HAVE_DUPLOCALE = @HAVE_DUPLOCALE@
+HAVE_EUIDACCESS = @HAVE_EUIDACCESS@
+HAVE_EXECVPE = @HAVE_EXECVPE@
+HAVE_EXPLICIT_BZERO = @HAVE_EXPLICIT_BZERO@
+HAVE_FACCESSAT = @HAVE_FACCESSAT@
+HAVE_FCHDIR = @HAVE_FCHDIR@
+HAVE_FCHMODAT = @HAVE_FCHMODAT@
+HAVE_FCHOWNAT = @HAVE_FCHOWNAT@
+HAVE_FCNTL = @HAVE_FCNTL@
+HAVE_FDATASYNC = @HAVE_FDATASYNC@
+HAVE_FDOPENDIR = @HAVE_FDOPENDIR@
+HAVE_FEATURES_H = @HAVE_FEATURES_H@
+HAVE_FFSL = @HAVE_FFSL@
+HAVE_FFSLL = @HAVE_FFSLL@
+HAVE_FNMATCH = @HAVE_FNMATCH@
+HAVE_FNMATCH_H = @HAVE_FNMATCH_H@
+HAVE_FREELOCALE = @HAVE_FREELOCALE@
+HAVE_FSEEKO = @HAVE_FSEEKO@
+HAVE_FSTATAT = @HAVE_FSTATAT@
+HAVE_FSYNC = @HAVE_FSYNC@
+HAVE_FTELLO = @HAVE_FTELLO@
+HAVE_FTRUNCATE = @HAVE_FTRUNCATE@
+HAVE_FUTIMENS = @HAVE_FUTIMENS@
+HAVE_GETDTABLESIZE = @HAVE_GETDTABLESIZE@
+HAVE_GETENTROPY = @HAVE_GETENTROPY@
+HAVE_GETGROUPS = @HAVE_GETGROUPS@
+HAVE_GETHOSTNAME = @HAVE_GETHOSTNAME@
+HAVE_GETLOGIN = @HAVE_GETLOGIN@
+HAVE_GETOPT_H = @HAVE_GETOPT_H@
+HAVE_GETPAGESIZE = @HAVE_GETPAGESIZE@
+HAVE_GETPASS = @HAVE_GETPASS@
+HAVE_GETSUBOPT = @HAVE_GETSUBOPT@
+HAVE_GETTIMEOFDAY = @HAVE_GETTIMEOFDAY@
+HAVE_GETUMASK = @HAVE_GETUMASK@
+HAVE_GRANTPT = @HAVE_GRANTPT@
+HAVE_GROUP_MEMBER = @HAVE_GROUP_MEMBER@
+HAVE_IMAXDIV_T = @HAVE_IMAXDIV_T@
+HAVE_INITSTATE = @HAVE_INITSTATE@
+HAVE_INTTYPES_H = @HAVE_INTTYPES_H@
+HAVE_ISBLANK = @HAVE_ISBLANK@
+HAVE_ISWBLANK = @HAVE_ISWBLANK@
+HAVE_ISWCNTRL = @HAVE_ISWCNTRL@
+HAVE_LANGINFO_ALTMON = @HAVE_LANGINFO_ALTMON@
+HAVE_LANGINFO_CODESET = @HAVE_LANGINFO_CODESET@
+HAVE_LANGINFO_ERA = @HAVE_LANGINFO_ERA@
+HAVE_LANGINFO_H = @HAVE_LANGINFO_H@
+HAVE_LANGINFO_T_FMT_AMPM = @HAVE_LANGINFO_T_FMT_AMPM@
+HAVE_LANGINFO_YESEXPR = @HAVE_LANGINFO_YESEXPR@
+HAVE_LCHMOD = @HAVE_LCHMOD@
+HAVE_LCHOWN = @HAVE_LCHOWN@
+HAVE_LIBSIGSEGV = @HAVE_LIBSIGSEGV@
+HAVE_LINK = @HAVE_LINK@
+HAVE_LINKAT = @HAVE_LINKAT@
+HAVE_LSTAT = @HAVE_LSTAT@
+HAVE_MAX_ALIGN_T = @HAVE_MAX_ALIGN_T@
+HAVE_MBRLEN = @HAVE_MBRLEN@
+HAVE_MBRTOWC = @HAVE_MBRTOWC@
+HAVE_MBSINIT = @HAVE_MBSINIT@
+HAVE_MBSLEN = @HAVE_MBSLEN@
+HAVE_MBSNRTOWCS = @HAVE_MBSNRTOWCS@
+HAVE_MBSRTOWCS = @HAVE_MBSRTOWCS@
+HAVE_MBTOWC = @HAVE_MBTOWC@
+HAVE_MEMPCPY = @HAVE_MEMPCPY@
+HAVE_MKDIRAT = @HAVE_MKDIRAT@
+HAVE_MKDTEMP = @HAVE_MKDTEMP@
+HAVE_MKFIFO = @HAVE_MKFIFO@
+HAVE_MKFIFOAT = @HAVE_MKFIFOAT@
+HAVE_MKNOD = @HAVE_MKNOD@
+HAVE_MKNODAT = @HAVE_MKNODAT@
+HAVE_MKOSTEMP = @HAVE_MKOSTEMP@
+HAVE_MKOSTEMPS = @HAVE_MKOSTEMPS@
+HAVE_MKSTEMP = @HAVE_MKSTEMP@
+HAVE_MKSTEMPS = @HAVE_MKSTEMPS@
+HAVE_MSVC_INVALID_PARAMETER_HANDLER = @HAVE_MSVC_INVALID_PARAMETER_HANDLER@
+HAVE_NANOSLEEP = @HAVE_NANOSLEEP@
+HAVE_NETINET_IN_H = @HAVE_NETINET_IN_H@
+HAVE_NEWLOCALE = @HAVE_NEWLOCALE@
+HAVE_NL_LANGINFO = @HAVE_NL_LANGINFO@
+HAVE_OPENAT = @HAVE_OPENAT@
+HAVE_OPENDIR = @HAVE_OPENDIR@
+HAVE_OS_H = @HAVE_OS_H@
+HAVE_PCLOSE = @HAVE_PCLOSE@
+HAVE_PIPE = @HAVE_PIPE@
+HAVE_PIPE2 = @HAVE_PIPE2@
+HAVE_POPEN = @HAVE_POPEN@
+HAVE_POSIX_MEMALIGN = @HAVE_POSIX_MEMALIGN@
+HAVE_POSIX_OPENPT = @HAVE_POSIX_OPENPT@
+HAVE_POSIX_SIGNALBLOCKING = @HAVE_POSIX_SIGNALBLOCKING@
+HAVE_PREAD = @HAVE_PREAD@
+HAVE_PSELECT = @HAVE_PSELECT@
+HAVE_PTHREAD_ATTR_DESTROY = @HAVE_PTHREAD_ATTR_DESTROY@
+HAVE_PTHREAD_ATTR_GETDETACHSTATE = @HAVE_PTHREAD_ATTR_GETDETACHSTATE@
+HAVE_PTHREAD_ATTR_INIT = @HAVE_PTHREAD_ATTR_INIT@
+HAVE_PTHREAD_ATTR_SETDETACHSTATE = @HAVE_PTHREAD_ATTR_SETDETACHSTATE@
+HAVE_PTHREAD_CONDATTR_DESTROY = @HAVE_PTHREAD_CONDATTR_DESTROY@
+HAVE_PTHREAD_CONDATTR_INIT = @HAVE_PTHREAD_CONDATTR_INIT@
+HAVE_PTHREAD_COND_BROADCAST = @HAVE_PTHREAD_COND_BROADCAST@
+HAVE_PTHREAD_COND_DESTROY = @HAVE_PTHREAD_COND_DESTROY@
+HAVE_PTHREAD_COND_INIT = @HAVE_PTHREAD_COND_INIT@
+HAVE_PTHREAD_COND_SIGNAL = @HAVE_PTHREAD_COND_SIGNAL@
+HAVE_PTHREAD_COND_TIMEDWAIT = @HAVE_PTHREAD_COND_TIMEDWAIT@
+HAVE_PTHREAD_COND_WAIT = @HAVE_PTHREAD_COND_WAIT@
+HAVE_PTHREAD_CREATE = @HAVE_PTHREAD_CREATE@
+HAVE_PTHREAD_CREATE_DETACHED = @HAVE_PTHREAD_CREATE_DETACHED@
+HAVE_PTHREAD_DETACH = @HAVE_PTHREAD_DETACH@
+HAVE_PTHREAD_EQUAL = @HAVE_PTHREAD_EQUAL@
+HAVE_PTHREAD_EXIT = @HAVE_PTHREAD_EXIT@
+HAVE_PTHREAD_GETSPECIFIC = @HAVE_PTHREAD_GETSPECIFIC@
+HAVE_PTHREAD_H = @HAVE_PTHREAD_H@
+HAVE_PTHREAD_JOIN = @HAVE_PTHREAD_JOIN@
+HAVE_PTHREAD_KEY_CREATE = @HAVE_PTHREAD_KEY_CREATE@
+HAVE_PTHREAD_KEY_DELETE = @HAVE_PTHREAD_KEY_DELETE@
+HAVE_PTHREAD_MUTEXATTR_DESTROY = @HAVE_PTHREAD_MUTEXATTR_DESTROY@
+HAVE_PTHREAD_MUTEXATTR_GETROBUST = @HAVE_PTHREAD_MUTEXATTR_GETROBUST@
+HAVE_PTHREAD_MUTEXATTR_GETTYPE = @HAVE_PTHREAD_MUTEXATTR_GETTYPE@
+HAVE_PTHREAD_MUTEXATTR_INIT = @HAVE_PTHREAD_MUTEXATTR_INIT@
+HAVE_PTHREAD_MUTEXATTR_SETROBUST = @HAVE_PTHREAD_MUTEXATTR_SETROBUST@
+HAVE_PTHREAD_MUTEXATTR_SETTYPE = @HAVE_PTHREAD_MUTEXATTR_SETTYPE@
+HAVE_PTHREAD_MUTEX_DESTROY = @HAVE_PTHREAD_MUTEX_DESTROY@
+HAVE_PTHREAD_MUTEX_INIT = @HAVE_PTHREAD_MUTEX_INIT@
+HAVE_PTHREAD_MUTEX_LOCK = @HAVE_PTHREAD_MUTEX_LOCK@
+HAVE_PTHREAD_MUTEX_RECURSIVE = @HAVE_PTHREAD_MUTEX_RECURSIVE@
+HAVE_PTHREAD_MUTEX_ROBUST = @HAVE_PTHREAD_MUTEX_ROBUST@
+HAVE_PTHREAD_MUTEX_TIMEDLOCK = @HAVE_PTHREAD_MUTEX_TIMEDLOCK@
+HAVE_PTHREAD_MUTEX_TRYLOCK = @HAVE_PTHREAD_MUTEX_TRYLOCK@
+HAVE_PTHREAD_MUTEX_UNLOCK = @HAVE_PTHREAD_MUTEX_UNLOCK@
+HAVE_PTHREAD_ONCE = @HAVE_PTHREAD_ONCE@
+HAVE_PTHREAD_PROCESS_SHARED = @HAVE_PTHREAD_PROCESS_SHARED@
+HAVE_PTHREAD_RWLOCKATTR_DESTROY = @HAVE_PTHREAD_RWLOCKATTR_DESTROY@
+HAVE_PTHREAD_RWLOCKATTR_INIT = @HAVE_PTHREAD_RWLOCKATTR_INIT@
+HAVE_PTHREAD_RWLOCK_DESTROY = @HAVE_PTHREAD_RWLOCK_DESTROY@
+HAVE_PTHREAD_RWLOCK_INIT = @HAVE_PTHREAD_RWLOCK_INIT@
+HAVE_PTHREAD_RWLOCK_RDLOCK = @HAVE_PTHREAD_RWLOCK_RDLOCK@
+HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK = @HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK@
+HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK = @HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK@
+HAVE_PTHREAD_RWLOCK_TRYRDLOCK = @HAVE_PTHREAD_RWLOCK_TRYRDLOCK@
+HAVE_PTHREAD_RWLOCK_TRYWRLOCK = @HAVE_PTHREAD_RWLOCK_TRYWRLOCK@
+HAVE_PTHREAD_RWLOCK_UNLOCK = @HAVE_PTHREAD_RWLOCK_UNLOCK@
+HAVE_PTHREAD_RWLOCK_WRLOCK = @HAVE_PTHREAD_RWLOCK_WRLOCK@
+HAVE_PTHREAD_SELF = @HAVE_PTHREAD_SELF@
+HAVE_PTHREAD_SETSPECIFIC = @HAVE_PTHREAD_SETSPECIFIC@
+HAVE_PTHREAD_SIGMASK = @HAVE_PTHREAD_SIGMASK@
+HAVE_PTHREAD_SPINLOCK_T = @HAVE_PTHREAD_SPINLOCK_T@
+HAVE_PTHREAD_SPIN_DESTROY = @HAVE_PTHREAD_SPIN_DESTROY@
+HAVE_PTHREAD_SPIN_INIT = @HAVE_PTHREAD_SPIN_INIT@
+HAVE_PTHREAD_SPIN_LOCK = @HAVE_PTHREAD_SPIN_LOCK@
+HAVE_PTHREAD_SPIN_TRYLOCK = @HAVE_PTHREAD_SPIN_TRYLOCK@
+HAVE_PTHREAD_SPIN_UNLOCK = @HAVE_PTHREAD_SPIN_UNLOCK@
+HAVE_PTHREAD_T = @HAVE_PTHREAD_T@
+HAVE_PTSNAME = @HAVE_PTSNAME@
+HAVE_PTSNAME_R = @HAVE_PTSNAME_R@
+HAVE_PWRITE = @HAVE_PWRITE@
+HAVE_QSORT_R = @HAVE_QSORT_R@
+HAVE_RAISE = @HAVE_RAISE@
+HAVE_RANDOM = @HAVE_RANDOM@
+HAVE_RANDOM_H = @HAVE_RANDOM_H@
+HAVE_RANDOM_R = @HAVE_RANDOM_R@
+HAVE_RAWMEMCHR = @HAVE_RAWMEMCHR@
+HAVE_READDIR = @HAVE_READDIR@
+HAVE_READLINK = @HAVE_READLINK@
+HAVE_READLINKAT = @HAVE_READLINKAT@
+HAVE_REALLOCARRAY = @HAVE_REALLOCARRAY@
+HAVE_REALPATH = @HAVE_REALPATH@
+HAVE_RENAMEAT = @HAVE_RENAMEAT@
+HAVE_REWINDDIR = @HAVE_REWINDDIR@
+HAVE_RPMATCH = @HAVE_RPMATCH@
+HAVE_SA_FAMILY_T = @HAVE_SA_FAMILY_T@
+HAVE_SCANDIR = @HAVE_SCANDIR@
+HAVE_SCHED_H = @HAVE_SCHED_H@
+HAVE_SCHED_YIELD = @HAVE_SCHED_YIELD@
+HAVE_SECURE_GETENV = @HAVE_SECURE_GETENV@
+HAVE_SETENV = @HAVE_SETENV@
+HAVE_SETHOSTNAME = @HAVE_SETHOSTNAME@
+HAVE_SETSTATE = @HAVE_SETSTATE@
+HAVE_SIGABBREV_NP = @HAVE_SIGABBREV_NP@
+HAVE_SIGACTION = @HAVE_SIGACTION@
+HAVE_SIGDESCR_NP = @HAVE_SIGDESCR_NP@
+HAVE_SIGHANDLER_T = @HAVE_SIGHANDLER_T@
+HAVE_SIGINFO_T = @HAVE_SIGINFO_T@
+HAVE_SIGNED_SIG_ATOMIC_T = @HAVE_SIGNED_SIG_ATOMIC_T@
+HAVE_SIGNED_WCHAR_T = @HAVE_SIGNED_WCHAR_T@
+HAVE_SIGNED_WINT_T = @HAVE_SIGNED_WINT_T@
+HAVE_SIGSET_T = @HAVE_SIGSET_T@
+HAVE_SLEEP = @HAVE_SLEEP@
+HAVE_STDINT_H = @HAVE_STDINT_H@
+HAVE_STPCPY = @HAVE_STPCPY@
+HAVE_STPNCPY = @HAVE_STPNCPY@
+HAVE_STRCASESTR = @HAVE_STRCASESTR@
+HAVE_STRCHRNUL = @HAVE_STRCHRNUL@
+HAVE_STRERRORNAME_NP = @HAVE_STRERRORNAME_NP@
+HAVE_STRPBRK = @HAVE_STRPBRK@
+HAVE_STRPTIME = @HAVE_STRPTIME@
+HAVE_STRSEP = @HAVE_STRSEP@
+HAVE_STRTOD = @HAVE_STRTOD@
+HAVE_STRTOL = @HAVE_STRTOL@
+HAVE_STRTOLD = @HAVE_STRTOLD@
+HAVE_STRTOLL = @HAVE_STRTOLL@
+HAVE_STRTOUL = @HAVE_STRTOUL@
+HAVE_STRTOULL = @HAVE_STRTOULL@
+HAVE_STRUCT_RANDOM_DATA = @HAVE_STRUCT_RANDOM_DATA@
+HAVE_STRUCT_SCHED_PARAM = @HAVE_STRUCT_SCHED_PARAM@
+HAVE_STRUCT_SIGACTION_SA_SIGACTION = @HAVE_STRUCT_SIGACTION_SA_SIGACTION@
+HAVE_STRUCT_SOCKADDR_STORAGE = @HAVE_STRUCT_SOCKADDR_STORAGE@
+HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY = @HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY@
+HAVE_STRUCT_TIMEVAL = @HAVE_STRUCT_TIMEVAL@
+HAVE_STRVERSCMP = @HAVE_STRVERSCMP@
+HAVE_SYMLINK = @HAVE_SYMLINK@
+HAVE_SYMLINKAT = @HAVE_SYMLINKAT@
+HAVE_SYS_BITYPES_H = @HAVE_SYS_BITYPES_H@
+HAVE_SYS_CDEFS_H = @HAVE_SYS_CDEFS_H@
+HAVE_SYS_INTTYPES_H = @HAVE_SYS_INTTYPES_H@
+HAVE_SYS_IOCTL_H = @HAVE_SYS_IOCTL_H@
+HAVE_SYS_LOADAVG_H = @HAVE_SYS_LOADAVG_H@
+HAVE_SYS_PARAM_H = @HAVE_SYS_PARAM_H@
+HAVE_SYS_SELECT_H = @HAVE_SYS_SELECT_H@
+HAVE_SYS_SOCKET_H = @HAVE_SYS_SOCKET_H@
+HAVE_SYS_TIME_H = @HAVE_SYS_TIME_H@
+HAVE_SYS_TYPES_H = @HAVE_SYS_TYPES_H@
+HAVE_SYS_UIO_H = @HAVE_SYS_UIO_H@
+HAVE_TIMEGM = @HAVE_TIMEGM@
+HAVE_TIMESPEC_GET = @HAVE_TIMESPEC_GET@
+HAVE_TIMEZONE_T = @HAVE_TIMEZONE_T@
+HAVE_TYPE_VOLATILE_SIG_ATOMIC_T = @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
+HAVE_UNISTD_H = @HAVE_UNISTD_H@
+HAVE_UNLINKAT = @HAVE_UNLINKAT@
+HAVE_UNLOCKPT = @HAVE_UNLOCKPT@
+HAVE_USLEEP = @HAVE_USLEEP@
+HAVE_UTIMENSAT = @HAVE_UTIMENSAT@
+HAVE_VASPRINTF = @HAVE_VASPRINTF@
+HAVE_VDPRINTF = @HAVE_VDPRINTF@
+HAVE_VISIBILITY = @HAVE_VISIBILITY@
+HAVE_WCHAR_H = @HAVE_WCHAR_H@
+HAVE_WCHAR_T = @HAVE_WCHAR_T@
+HAVE_WCPCPY = @HAVE_WCPCPY@
+HAVE_WCPNCPY = @HAVE_WCPNCPY@
+HAVE_WCRTOMB = @HAVE_WCRTOMB@
+HAVE_WCSCASECMP = @HAVE_WCSCASECMP@
+HAVE_WCSCAT = @HAVE_WCSCAT@
+HAVE_WCSCHR = @HAVE_WCSCHR@
+HAVE_WCSCMP = @HAVE_WCSCMP@
+HAVE_WCSCOLL = @HAVE_WCSCOLL@
+HAVE_WCSCPY = @HAVE_WCSCPY@
+HAVE_WCSCSPN = @HAVE_WCSCSPN@
+HAVE_WCSDUP = @HAVE_WCSDUP@
+HAVE_WCSFTIME = @HAVE_WCSFTIME@
+HAVE_WCSLEN = @HAVE_WCSLEN@
+HAVE_WCSNCASECMP = @HAVE_WCSNCASECMP@
+HAVE_WCSNCAT = @HAVE_WCSNCAT@
+HAVE_WCSNCMP = @HAVE_WCSNCMP@
+HAVE_WCSNCPY = @HAVE_WCSNCPY@
+HAVE_WCSNLEN = @HAVE_WCSNLEN@
+HAVE_WCSNRTOMBS = @HAVE_WCSNRTOMBS@
+HAVE_WCSPBRK = @HAVE_WCSPBRK@
+HAVE_WCSRCHR = @HAVE_WCSRCHR@
+HAVE_WCSRTOMBS = @HAVE_WCSRTOMBS@
+HAVE_WCSSPN = @HAVE_WCSSPN@
+HAVE_WCSSTR = @HAVE_WCSSTR@
+HAVE_WCSTOK = @HAVE_WCSTOK@
+HAVE_WCSWIDTH = @HAVE_WCSWIDTH@
+HAVE_WCSXFRM = @HAVE_WCSXFRM@
+HAVE_WCTRANS_T = @HAVE_WCTRANS_T@
+HAVE_WCTYPE_H = @HAVE_WCTYPE_H@
+HAVE_WCTYPE_T = @HAVE_WCTYPE_T@
+HAVE_WINSOCK2_H = @HAVE_WINSOCK2_H@
+HAVE_WINT_T = @HAVE_WINT_T@
+HAVE_WMEMCHR = @HAVE_WMEMCHR@
+HAVE_WMEMCMP = @HAVE_WMEMCMP@
+HAVE_WMEMCPY = @HAVE_WMEMCPY@
+HAVE_WMEMMOVE = @HAVE_WMEMMOVE@
+HAVE_WMEMPCPY = @HAVE_WMEMPCPY@
+HAVE_WMEMSET = @HAVE_WMEMSET@
+HAVE_WS2TCPIP_H = @HAVE_WS2TCPIP_H@
+HAVE_XLOCALE_H = @HAVE_XLOCALE_H@
+HAVE__BOOL = @HAVE__BOOL@
+HAVE__EXIT = @HAVE__EXIT@
+HOST_CPU = @HOST_CPU@
+HOST_CPU_C_ABI = @HOST_CPU_C_ABI@
+ICONV_CONST = @ICONV_CONST@
+ICONV_H = @ICONV_H@
+INCLUDE_NEXT = @INCLUDE_NEXT@
+INCLUDE_NEXT_AS_FIRST_DIRECTIVE = @INCLUDE_NEXT_AS_FIRST_DIRECTIVE@
+INET_PTON_LIB = @INET_PTON_LIB@
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+INT32_MAX_LT_INTMAX_MAX = @INT32_MAX_LT_INTMAX_MAX@
+INT64_MAX_EQ_LONG_MAX = @INT64_MAX_EQ_LONG_MAX@
+INTLLIBS = @INTLLIBS@
+INTL_MACOSX_LIBS = @INTL_MACOSX_LIBS@
+LDFLAGS = @LDFLAGS@
+LIBCSTACK = @LIBCSTACK@
+LIBGREPUTILS_LIBDEPS = @LIBGREPUTILS_LIBDEPS@
+LIBGREPUTILS_LTLIBDEPS = @LIBGREPUTILS_LTLIBDEPS@
+LIBICONV = @LIBICONV@
+LIBINTL = @LIBINTL@
+LIBMULTITHREAD = @LIBMULTITHREAD@
+LIBOBJS = @LIBOBJS@
+LIBPMULTITHREAD = @LIBPMULTITHREAD@
+LIBPTHREAD = @LIBPTHREAD@
+LIBS = @LIBS@
+LIBSIGSEGV = @LIBSIGSEGV@
+LIBSIGSEGV_PREFIX = @LIBSIGSEGV_PREFIX@
+LIBSOCKET = @LIBSOCKET@
+LIBSTDTHREAD = @LIBSTDTHREAD@
+LIBTESTS_LIBDEPS = @LIBTESTS_LIBDEPS@
+LIBTHREAD = @LIBTHREAD@
+LIBUNISTRING_UNISTR_H = @LIBUNISTRING_UNISTR_H@
+LIBUNISTRING_UNITYPES_H = @LIBUNISTRING_UNITYPES_H@
+LIBUNISTRING_UNIWIDTH_H = @LIBUNISTRING_UNIWIDTH_H@
+LIB_HARD_LOCALE = @LIB_HARD_LOCALE@
+LIB_MBRTOWC = @LIB_MBRTOWC@
+LIB_NANOSLEEP = @LIB_NANOSLEEP@
+LIB_NL_LANGINFO = @LIB_NL_LANGINFO@
+LIB_PTHREAD = @LIB_PTHREAD@
+LIB_PTHREAD_SIGMASK = @LIB_PTHREAD_SIGMASK@
+LIB_SCHED_YIELD = @LIB_SCHED_YIELD@
+LIB_SELECT = @LIB_SELECT@
+LIB_SETLOCALE = @LIB_SETLOCALE@
+LIB_SETLOCALE_NULL = @LIB_SETLOCALE_NULL@
+LIMITS_H = @LIMITS_H@
+LOCALCHARSET_TESTS_ENVIRONMENT = @LOCALCHARSET_TESTS_ENVIRONMENT@
+LOCALENAME_ENHANCE_LOCALE_FUNCS = @LOCALENAME_ENHANCE_LOCALE_FUNCS@
+LOCALE_FR = @LOCALE_FR@
+LOCALE_FR_UTF8 = @LOCALE_FR_UTF8@
+LOCALE_JA = @LOCALE_JA@
+LOCALE_TR_UTF8 = @LOCALE_TR_UTF8@
+LOCALE_ZH_CN = @LOCALE_ZH_CN@
+LTLIBCSTACK = @LTLIBCSTACK@
+LTLIBICONV = @LTLIBICONV@
+LTLIBINTL = @LTLIBINTL@
+LTLIBMULTITHREAD = @LTLIBMULTITHREAD@
+LTLIBOBJS = @LTLIBOBJS@
+LTLIBSIGSEGV = @LTLIBSIGSEGV@
+LTLIBTHREAD = @LTLIBTHREAD@
+MAKEINFO = @MAKEINFO@
+MKDIR_P = @MKDIR_P@
+MSGFMT = @MSGFMT@
+MSGFMT_015 = @MSGFMT_015@
+MSGMERGE = @MSGMERGE@
+NETINET_IN_H = @NETINET_IN_H@
+NEXT_ARPA_INET_H = @NEXT_ARPA_INET_H@
+NEXT_AS_FIRST_DIRECTIVE_ARPA_INET_H = @NEXT_AS_FIRST_DIRECTIVE_ARPA_INET_H@
+NEXT_AS_FIRST_DIRECTIVE_CTYPE_H = @NEXT_AS_FIRST_DIRECTIVE_CTYPE_H@
+NEXT_AS_FIRST_DIRECTIVE_DIRENT_H = @NEXT_AS_FIRST_DIRECTIVE_DIRENT_H@
+NEXT_AS_FIRST_DIRECTIVE_ERRNO_H = @NEXT_AS_FIRST_DIRECTIVE_ERRNO_H@
+NEXT_AS_FIRST_DIRECTIVE_FCNTL_H = @NEXT_AS_FIRST_DIRECTIVE_FCNTL_H@
+NEXT_AS_FIRST_DIRECTIVE_FLOAT_H = @NEXT_AS_FIRST_DIRECTIVE_FLOAT_H@
+NEXT_AS_FIRST_DIRECTIVE_FNMATCH_H = @NEXT_AS_FIRST_DIRECTIVE_FNMATCH_H@
+NEXT_AS_FIRST_DIRECTIVE_GETOPT_H = @NEXT_AS_FIRST_DIRECTIVE_GETOPT_H@
+NEXT_AS_FIRST_DIRECTIVE_ICONV_H = @NEXT_AS_FIRST_DIRECTIVE_ICONV_H@
+NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H = @NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H@
+NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H = @NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H@
+NEXT_AS_FIRST_DIRECTIVE_LIMITS_H = @NEXT_AS_FIRST_DIRECTIVE_LIMITS_H@
+NEXT_AS_FIRST_DIRECTIVE_LOCALE_H = @NEXT_AS_FIRST_DIRECTIVE_LOCALE_H@
+NEXT_AS_FIRST_DIRECTIVE_NETINET_IN_H = @NEXT_AS_FIRST_DIRECTIVE_NETINET_IN_H@
+NEXT_AS_FIRST_DIRECTIVE_PTHREAD_H = @NEXT_AS_FIRST_DIRECTIVE_PTHREAD_H@
+NEXT_AS_FIRST_DIRECTIVE_SCHED_H = @NEXT_AS_FIRST_DIRECTIVE_SCHED_H@
+NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H = @NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H@
+NEXT_AS_FIRST_DIRECTIVE_STDARG_H = @NEXT_AS_FIRST_DIRECTIVE_STDARG_H@
+NEXT_AS_FIRST_DIRECTIVE_STDDEF_H = @NEXT_AS_FIRST_DIRECTIVE_STDDEF_H@
+NEXT_AS_FIRST_DIRECTIVE_STDINT_H = @NEXT_AS_FIRST_DIRECTIVE_STDINT_H@
+NEXT_AS_FIRST_DIRECTIVE_STDIO_H = @NEXT_AS_FIRST_DIRECTIVE_STDIO_H@
+NEXT_AS_FIRST_DIRECTIVE_STDLIB_H = @NEXT_AS_FIRST_DIRECTIVE_STDLIB_H@
+NEXT_AS_FIRST_DIRECTIVE_STRING_H = @NEXT_AS_FIRST_DIRECTIVE_STRING_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H@
+NEXT_AS_FIRST_DIRECTIVE_TIME_H = @NEXT_AS_FIRST_DIRECTIVE_TIME_H@
+NEXT_AS_FIRST_DIRECTIVE_UNISTD_H = @NEXT_AS_FIRST_DIRECTIVE_UNISTD_H@
+NEXT_AS_FIRST_DIRECTIVE_WCHAR_H = @NEXT_AS_FIRST_DIRECTIVE_WCHAR_H@
+NEXT_AS_FIRST_DIRECTIVE_WCTYPE_H = @NEXT_AS_FIRST_DIRECTIVE_WCTYPE_H@
+NEXT_CTYPE_H = @NEXT_CTYPE_H@
+NEXT_DIRENT_H = @NEXT_DIRENT_H@
+NEXT_ERRNO_H = @NEXT_ERRNO_H@
+NEXT_FCNTL_H = @NEXT_FCNTL_H@
+NEXT_FLOAT_H = @NEXT_FLOAT_H@
+NEXT_FNMATCH_H = @NEXT_FNMATCH_H@
+NEXT_GETOPT_H = @NEXT_GETOPT_H@
+NEXT_ICONV_H = @NEXT_ICONV_H@
+NEXT_INTTYPES_H = @NEXT_INTTYPES_H@
+NEXT_LANGINFO_H = @NEXT_LANGINFO_H@
+NEXT_LIMITS_H = @NEXT_LIMITS_H@
+NEXT_LOCALE_H = @NEXT_LOCALE_H@
+NEXT_NETINET_IN_H = @NEXT_NETINET_IN_H@
+NEXT_PTHREAD_H = @NEXT_PTHREAD_H@
+NEXT_SCHED_H = @NEXT_SCHED_H@
+NEXT_SIGNAL_H = @NEXT_SIGNAL_H@
+NEXT_STDARG_H = @NEXT_STDARG_H@
+NEXT_STDDEF_H = @NEXT_STDDEF_H@
+NEXT_STDINT_H = @NEXT_STDINT_H@
+NEXT_STDIO_H = @NEXT_STDIO_H@
+NEXT_STDLIB_H = @NEXT_STDLIB_H@
+NEXT_STRING_H = @NEXT_STRING_H@
+NEXT_SYS_IOCTL_H = @NEXT_SYS_IOCTL_H@
+NEXT_SYS_SELECT_H = @NEXT_SYS_SELECT_H@
+NEXT_SYS_SOCKET_H = @NEXT_SYS_SOCKET_H@
+NEXT_SYS_STAT_H = @NEXT_SYS_STAT_H@
+NEXT_SYS_TIME_H = @NEXT_SYS_TIME_H@
+NEXT_SYS_TYPES_H = @NEXT_SYS_TYPES_H@
+NEXT_SYS_UIO_H = @NEXT_SYS_UIO_H@
+NEXT_TIME_H = @NEXT_TIME_H@
+NEXT_UNISTD_H = @NEXT_UNISTD_H@
+NEXT_WCHAR_H = @NEXT_WCHAR_H@
+NEXT_WCTYPE_H = @NEXT_WCTYPE_H@
+OBJEXT = @OBJEXT@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_STRING = @PACKAGE_STRING@
+PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+PCRE_CFLAGS = @PCRE_CFLAGS@
+PCRE_LIBS = @PCRE_LIBS@
+PERL = @PERL@
+PKG_CONFIG = @PKG_CONFIG@
+PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@
+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
+POSUB = @POSUB@
+PRAGMA_COLUMNS = @PRAGMA_COLUMNS@
+PRAGMA_SYSTEM_HEADER = @PRAGMA_SYSTEM_HEADER@
+PRIPTR_PREFIX = @PRIPTR_PREFIX@
+PTHREAD_H_DEFINES_STRUCT_TIMESPEC = @PTHREAD_H_DEFINES_STRUCT_TIMESPEC@
+PTRDIFF_T_SUFFIX = @PTRDIFF_T_SUFFIX@
+RANLIB = @RANLIB@
+REPLACE_ACCESS = @REPLACE_ACCESS@
+REPLACE_ALIGNED_ALLOC = @REPLACE_ALIGNED_ALLOC@
+REPLACE_BTOWC = @REPLACE_BTOWC@
+REPLACE_CALLOC = @REPLACE_CALLOC@
+REPLACE_CANONICALIZE_FILE_NAME = @REPLACE_CANONICALIZE_FILE_NAME@
+REPLACE_CHOWN = @REPLACE_CHOWN@
+REPLACE_CLOSE = @REPLACE_CLOSE@
+REPLACE_CLOSEDIR = @REPLACE_CLOSEDIR@
+REPLACE_CREAT = @REPLACE_CREAT@
+REPLACE_CTIME = @REPLACE_CTIME@
+REPLACE_DIRFD = @REPLACE_DIRFD@
+REPLACE_DPRINTF = @REPLACE_DPRINTF@
+REPLACE_DUP = @REPLACE_DUP@
+REPLACE_DUP2 = @REPLACE_DUP2@
+REPLACE_DUPLOCALE = @REPLACE_DUPLOCALE@
+REPLACE_EXECL = @REPLACE_EXECL@
+REPLACE_EXECLE = @REPLACE_EXECLE@
+REPLACE_EXECLP = @REPLACE_EXECLP@
+REPLACE_EXECV = @REPLACE_EXECV@
+REPLACE_EXECVE = @REPLACE_EXECVE@
+REPLACE_EXECVP = @REPLACE_EXECVP@
+REPLACE_EXECVPE = @REPLACE_EXECVPE@
+REPLACE_FACCESSAT = @REPLACE_FACCESSAT@
+REPLACE_FCHMODAT = @REPLACE_FCHMODAT@
+REPLACE_FCHOWNAT = @REPLACE_FCHOWNAT@
+REPLACE_FCLOSE = @REPLACE_FCLOSE@
+REPLACE_FCNTL = @REPLACE_FCNTL@
+REPLACE_FDOPEN = @REPLACE_FDOPEN@
+REPLACE_FDOPENDIR = @REPLACE_FDOPENDIR@
+REPLACE_FFLUSH = @REPLACE_FFLUSH@
+REPLACE_FFSLL = @REPLACE_FFSLL@
+REPLACE_FNMATCH = @REPLACE_FNMATCH@
+REPLACE_FOPEN = @REPLACE_FOPEN@
+REPLACE_FPRINTF = @REPLACE_FPRINTF@
+REPLACE_FPURGE = @REPLACE_FPURGE@
+REPLACE_FREE = @REPLACE_FREE@
+REPLACE_FREELOCALE = @REPLACE_FREELOCALE@
+REPLACE_FREOPEN = @REPLACE_FREOPEN@
+REPLACE_FSEEK = @REPLACE_FSEEK@
+REPLACE_FSEEKO = @REPLACE_FSEEKO@
+REPLACE_FSTAT = @REPLACE_FSTAT@
+REPLACE_FSTATAT = @REPLACE_FSTATAT@
+REPLACE_FTELL = @REPLACE_FTELL@
+REPLACE_FTELLO = @REPLACE_FTELLO@
+REPLACE_FTRUNCATE = @REPLACE_FTRUNCATE@
+REPLACE_FUTIMENS = @REPLACE_FUTIMENS@
+REPLACE_GETCWD = @REPLACE_GETCWD@
+REPLACE_GETDELIM = @REPLACE_GETDELIM@
+REPLACE_GETDOMAINNAME = @REPLACE_GETDOMAINNAME@
+REPLACE_GETDTABLESIZE = @REPLACE_GETDTABLESIZE@
+REPLACE_GETGROUPS = @REPLACE_GETGROUPS@
+REPLACE_GETLINE = @REPLACE_GETLINE@
+REPLACE_GETLOGIN_R = @REPLACE_GETLOGIN_R@
+REPLACE_GETPAGESIZE = @REPLACE_GETPAGESIZE@
+REPLACE_GETPASS = @REPLACE_GETPASS@
+REPLACE_GETTIMEOFDAY = @REPLACE_GETTIMEOFDAY@
+REPLACE_GMTIME = @REPLACE_GMTIME@
+REPLACE_ICONV = @REPLACE_ICONV@
+REPLACE_ICONV_OPEN = @REPLACE_ICONV_OPEN@
+REPLACE_ICONV_UTF = @REPLACE_ICONV_UTF@
+REPLACE_INET_NTOP = @REPLACE_INET_NTOP@
+REPLACE_INET_PTON = @REPLACE_INET_PTON@
+REPLACE_INITSTATE = @REPLACE_INITSTATE@
+REPLACE_IOCTL = @REPLACE_IOCTL@
+REPLACE_ISATTY = @REPLACE_ISATTY@
+REPLACE_ISWBLANK = @REPLACE_ISWBLANK@
+REPLACE_ISWCNTRL = @REPLACE_ISWCNTRL@
+REPLACE_ISWDIGIT = @REPLACE_ISWDIGIT@
+REPLACE_ISWXDIGIT = @REPLACE_ISWXDIGIT@
+REPLACE_ITOLD = @REPLACE_ITOLD@
+REPLACE_LCHOWN = @REPLACE_LCHOWN@
+REPLACE_LINK = @REPLACE_LINK@
+REPLACE_LINKAT = @REPLACE_LINKAT@
+REPLACE_LOCALECONV = @REPLACE_LOCALECONV@
+REPLACE_LOCALTIME = @REPLACE_LOCALTIME@
+REPLACE_LOCALTIME_R = @REPLACE_LOCALTIME_R@
+REPLACE_LSEEK = @REPLACE_LSEEK@
+REPLACE_LSTAT = @REPLACE_LSTAT@
+REPLACE_MALLOC = @REPLACE_MALLOC@
+REPLACE_MBRLEN = @REPLACE_MBRLEN@
+REPLACE_MBRTOWC = @REPLACE_MBRTOWC@
+REPLACE_MBSINIT = @REPLACE_MBSINIT@
+REPLACE_MBSNRTOWCS = @REPLACE_MBSNRTOWCS@
+REPLACE_MBSRTOWCS = @REPLACE_MBSRTOWCS@
+REPLACE_MBSTATE_T = @REPLACE_MBSTATE_T@
+REPLACE_MBTOWC = @REPLACE_MBTOWC@
+REPLACE_MEMCHR = @REPLACE_MEMCHR@
+REPLACE_MEMMEM = @REPLACE_MEMMEM@
+REPLACE_MKDIR = @REPLACE_MKDIR@
+REPLACE_MKFIFO = @REPLACE_MKFIFO@
+REPLACE_MKFIFOAT = @REPLACE_MKFIFOAT@
+REPLACE_MKNOD = @REPLACE_MKNOD@
+REPLACE_MKNODAT = @REPLACE_MKNODAT@
+REPLACE_MKSTEMP = @REPLACE_MKSTEMP@
+REPLACE_MKTIME = @REPLACE_MKTIME@
+REPLACE_NANOSLEEP = @REPLACE_NANOSLEEP@
+REPLACE_NEWLOCALE = @REPLACE_NEWLOCALE@
+REPLACE_NL_LANGINFO = @REPLACE_NL_LANGINFO@
+REPLACE_NULL = @REPLACE_NULL@
+REPLACE_OBSTACK_PRINTF = @REPLACE_OBSTACK_PRINTF@
+REPLACE_OPEN = @REPLACE_OPEN@
+REPLACE_OPENAT = @REPLACE_OPENAT@
+REPLACE_OPENDIR = @REPLACE_OPENDIR@
+REPLACE_PERROR = @REPLACE_PERROR@
+REPLACE_POPEN = @REPLACE_POPEN@
+REPLACE_POSIX_MEMALIGN = @REPLACE_POSIX_MEMALIGN@
+REPLACE_PREAD = @REPLACE_PREAD@
+REPLACE_PRINTF = @REPLACE_PRINTF@
+REPLACE_PSELECT = @REPLACE_PSELECT@
+REPLACE_PTHREAD_ATTR_DESTROY = @REPLACE_PTHREAD_ATTR_DESTROY@
+REPLACE_PTHREAD_ATTR_GETDETACHSTATE = @REPLACE_PTHREAD_ATTR_GETDETACHSTATE@
+REPLACE_PTHREAD_ATTR_INIT = @REPLACE_PTHREAD_ATTR_INIT@
+REPLACE_PTHREAD_ATTR_SETDETACHSTATE = @REPLACE_PTHREAD_ATTR_SETDETACHSTATE@
+REPLACE_PTHREAD_CONDATTR_DESTROY = @REPLACE_PTHREAD_CONDATTR_DESTROY@
+REPLACE_PTHREAD_CONDATTR_INIT = @REPLACE_PTHREAD_CONDATTR_INIT@
+REPLACE_PTHREAD_COND_BROADCAST = @REPLACE_PTHREAD_COND_BROADCAST@
+REPLACE_PTHREAD_COND_DESTROY = @REPLACE_PTHREAD_COND_DESTROY@
+REPLACE_PTHREAD_COND_INIT = @REPLACE_PTHREAD_COND_INIT@
+REPLACE_PTHREAD_COND_SIGNAL = @REPLACE_PTHREAD_COND_SIGNAL@
+REPLACE_PTHREAD_COND_TIMEDWAIT = @REPLACE_PTHREAD_COND_TIMEDWAIT@
+REPLACE_PTHREAD_COND_WAIT = @REPLACE_PTHREAD_COND_WAIT@
+REPLACE_PTHREAD_CREATE = @REPLACE_PTHREAD_CREATE@
+REPLACE_PTHREAD_DETACH = @REPLACE_PTHREAD_DETACH@
+REPLACE_PTHREAD_EQUAL = @REPLACE_PTHREAD_EQUAL@
+REPLACE_PTHREAD_EXIT = @REPLACE_PTHREAD_EXIT@
+REPLACE_PTHREAD_GETSPECIFIC = @REPLACE_PTHREAD_GETSPECIFIC@
+REPLACE_PTHREAD_JOIN = @REPLACE_PTHREAD_JOIN@
+REPLACE_PTHREAD_KEY_CREATE = @REPLACE_PTHREAD_KEY_CREATE@
+REPLACE_PTHREAD_KEY_DELETE = @REPLACE_PTHREAD_KEY_DELETE@
+REPLACE_PTHREAD_MUTEXATTR_DESTROY = @REPLACE_PTHREAD_MUTEXATTR_DESTROY@
+REPLACE_PTHREAD_MUTEXATTR_GETROBUST = @REPLACE_PTHREAD_MUTEXATTR_GETROBUST@
+REPLACE_PTHREAD_MUTEXATTR_GETTYPE = @REPLACE_PTHREAD_MUTEXATTR_GETTYPE@
+REPLACE_PTHREAD_MUTEXATTR_INIT = @REPLACE_PTHREAD_MUTEXATTR_INIT@
+REPLACE_PTHREAD_MUTEXATTR_SETROBUST = @REPLACE_PTHREAD_MUTEXATTR_SETROBUST@
+REPLACE_PTHREAD_MUTEXATTR_SETTYPE = @REPLACE_PTHREAD_MUTEXATTR_SETTYPE@
+REPLACE_PTHREAD_MUTEX_DESTROY = @REPLACE_PTHREAD_MUTEX_DESTROY@
+REPLACE_PTHREAD_MUTEX_INIT = @REPLACE_PTHREAD_MUTEX_INIT@
+REPLACE_PTHREAD_MUTEX_LOCK = @REPLACE_PTHREAD_MUTEX_LOCK@
+REPLACE_PTHREAD_MUTEX_TIMEDLOCK = @REPLACE_PTHREAD_MUTEX_TIMEDLOCK@
+REPLACE_PTHREAD_MUTEX_TRYLOCK = @REPLACE_PTHREAD_MUTEX_TRYLOCK@
+REPLACE_PTHREAD_MUTEX_UNLOCK = @REPLACE_PTHREAD_MUTEX_UNLOCK@
+REPLACE_PTHREAD_ONCE = @REPLACE_PTHREAD_ONCE@
+REPLACE_PTHREAD_RWLOCKATTR_DESTROY = @REPLACE_PTHREAD_RWLOCKATTR_DESTROY@
+REPLACE_PTHREAD_RWLOCKATTR_INIT = @REPLACE_PTHREAD_RWLOCKATTR_INIT@
+REPLACE_PTHREAD_RWLOCK_DESTROY = @REPLACE_PTHREAD_RWLOCK_DESTROY@
+REPLACE_PTHREAD_RWLOCK_INIT = @REPLACE_PTHREAD_RWLOCK_INIT@
+REPLACE_PTHREAD_RWLOCK_RDLOCK = @REPLACE_PTHREAD_RWLOCK_RDLOCK@
+REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK = @REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK@
+REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK = @REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK@
+REPLACE_PTHREAD_RWLOCK_TRYRDLOCK = @REPLACE_PTHREAD_RWLOCK_TRYRDLOCK@
+REPLACE_PTHREAD_RWLOCK_TRYWRLOCK = @REPLACE_PTHREAD_RWLOCK_TRYWRLOCK@
+REPLACE_PTHREAD_RWLOCK_UNLOCK = @REPLACE_PTHREAD_RWLOCK_UNLOCK@
+REPLACE_PTHREAD_RWLOCK_WRLOCK = @REPLACE_PTHREAD_RWLOCK_WRLOCK@
+REPLACE_PTHREAD_SELF = @REPLACE_PTHREAD_SELF@
+REPLACE_PTHREAD_SETSPECIFIC = @REPLACE_PTHREAD_SETSPECIFIC@
+REPLACE_PTHREAD_SIGMASK = @REPLACE_PTHREAD_SIGMASK@
+REPLACE_PTHREAD_SPIN_DESTROY = @REPLACE_PTHREAD_SPIN_DESTROY@
+REPLACE_PTHREAD_SPIN_INIT = @REPLACE_PTHREAD_SPIN_INIT@
+REPLACE_PTHREAD_SPIN_LOCK = @REPLACE_PTHREAD_SPIN_LOCK@
+REPLACE_PTHREAD_SPIN_TRYLOCK = @REPLACE_PTHREAD_SPIN_TRYLOCK@
+REPLACE_PTHREAD_SPIN_UNLOCK = @REPLACE_PTHREAD_SPIN_UNLOCK@
+REPLACE_PTSNAME = @REPLACE_PTSNAME@
+REPLACE_PTSNAME_R = @REPLACE_PTSNAME_R@
+REPLACE_PUTENV = @REPLACE_PUTENV@
+REPLACE_PWRITE = @REPLACE_PWRITE@
+REPLACE_QSORT_R = @REPLACE_QSORT_R@
+REPLACE_RAISE = @REPLACE_RAISE@
+REPLACE_RANDOM = @REPLACE_RANDOM@
+REPLACE_RANDOM_R = @REPLACE_RANDOM_R@
+REPLACE_READ = @REPLACE_READ@
+REPLACE_READLINK = @REPLACE_READLINK@
+REPLACE_READLINKAT = @REPLACE_READLINKAT@
+REPLACE_REALLOC = @REPLACE_REALLOC@
+REPLACE_REALLOCARRAY = @REPLACE_REALLOCARRAY@
+REPLACE_REALPATH = @REPLACE_REALPATH@
+REPLACE_REMOVE = @REPLACE_REMOVE@
+REPLACE_RENAME = @REPLACE_RENAME@
+REPLACE_RENAMEAT = @REPLACE_RENAMEAT@
+REPLACE_RMDIR = @REPLACE_RMDIR@
+REPLACE_SCHED_YIELD = @REPLACE_SCHED_YIELD@
+REPLACE_SELECT = @REPLACE_SELECT@
+REPLACE_SETENV = @REPLACE_SETENV@
+REPLACE_SETLOCALE = @REPLACE_SETLOCALE@
+REPLACE_SETSTATE = @REPLACE_SETSTATE@
+REPLACE_SLEEP = @REPLACE_SLEEP@
+REPLACE_SNPRINTF = @REPLACE_SNPRINTF@
+REPLACE_SPRINTF = @REPLACE_SPRINTF@
+REPLACE_STAT = @REPLACE_STAT@
+REPLACE_STDIO_READ_FUNCS = @REPLACE_STDIO_READ_FUNCS@
+REPLACE_STDIO_WRITE_FUNCS = @REPLACE_STDIO_WRITE_FUNCS@
+REPLACE_STPNCPY = @REPLACE_STPNCPY@
+REPLACE_STRCASESTR = @REPLACE_STRCASESTR@
+REPLACE_STRCHRNUL = @REPLACE_STRCHRNUL@
+REPLACE_STRDUP = @REPLACE_STRDUP@
+REPLACE_STRERROR = @REPLACE_STRERROR@
+REPLACE_STRERRORNAME_NP = @REPLACE_STRERRORNAME_NP@
+REPLACE_STRERROR_R = @REPLACE_STRERROR_R@
+REPLACE_STRFTIME = @REPLACE_STRFTIME@
+REPLACE_STRNCAT = @REPLACE_STRNCAT@
+REPLACE_STRNDUP = @REPLACE_STRNDUP@
+REPLACE_STRNLEN = @REPLACE_STRNLEN@
+REPLACE_STRSIGNAL = @REPLACE_STRSIGNAL@
+REPLACE_STRSTR = @REPLACE_STRSTR@
+REPLACE_STRTOD = @REPLACE_STRTOD@
+REPLACE_STRTOIMAX = @REPLACE_STRTOIMAX@
+REPLACE_STRTOK_R = @REPLACE_STRTOK_R@
+REPLACE_STRTOL = @REPLACE_STRTOL@
+REPLACE_STRTOLD = @REPLACE_STRTOLD@
+REPLACE_STRTOLL = @REPLACE_STRTOLL@
+REPLACE_STRTOUL = @REPLACE_STRTOUL@
+REPLACE_STRTOULL = @REPLACE_STRTOULL@
+REPLACE_STRTOUMAX = @REPLACE_STRTOUMAX@
+REPLACE_STRUCT_LCONV = @REPLACE_STRUCT_LCONV@
+REPLACE_STRUCT_TIMEVAL = @REPLACE_STRUCT_TIMEVAL@
+REPLACE_SYMLINK = @REPLACE_SYMLINK@
+REPLACE_SYMLINKAT = @REPLACE_SYMLINKAT@
+REPLACE_TIMEGM = @REPLACE_TIMEGM@
+REPLACE_TMPFILE = @REPLACE_TMPFILE@
+REPLACE_TOWLOWER = @REPLACE_TOWLOWER@
+REPLACE_TRUNCATE = @REPLACE_TRUNCATE@
+REPLACE_TTYNAME_R = @REPLACE_TTYNAME_R@
+REPLACE_TZSET = @REPLACE_TZSET@
+REPLACE_UNLINK = @REPLACE_UNLINK@
+REPLACE_UNLINKAT = @REPLACE_UNLINKAT@
+REPLACE_UNSETENV = @REPLACE_UNSETENV@
+REPLACE_USLEEP = @REPLACE_USLEEP@
+REPLACE_UTIMENSAT = @REPLACE_UTIMENSAT@
+REPLACE_VASPRINTF = @REPLACE_VASPRINTF@
+REPLACE_VDPRINTF = @REPLACE_VDPRINTF@
+REPLACE_VFPRINTF = @REPLACE_VFPRINTF@
+REPLACE_VPRINTF = @REPLACE_VPRINTF@
+REPLACE_VSNPRINTF = @REPLACE_VSNPRINTF@
+REPLACE_VSPRINTF = @REPLACE_VSPRINTF@
+REPLACE_WCRTOMB = @REPLACE_WCRTOMB@
+REPLACE_WCSFTIME = @REPLACE_WCSFTIME@
+REPLACE_WCSNRTOMBS = @REPLACE_WCSNRTOMBS@
+REPLACE_WCSRTOMBS = @REPLACE_WCSRTOMBS@
+REPLACE_WCSTOK = @REPLACE_WCSTOK@
+REPLACE_WCSWIDTH = @REPLACE_WCSWIDTH@
+REPLACE_WCTOB = @REPLACE_WCTOB@
+REPLACE_WCTOMB = @REPLACE_WCTOMB@
+REPLACE_WCWIDTH = @REPLACE_WCWIDTH@
+REPLACE_WRITE = @REPLACE_WRITE@
+SED = @SED@
+SET_MAKE = @SET_MAKE@
+SHELL = @SHELL@
+SIGSEGV_H = @SIGSEGV_H@
+SIG_ATOMIC_T_SUFFIX = @SIG_ATOMIC_T_SUFFIX@
+SIZE_T_SUFFIX = @SIZE_T_SUFFIX@
+STDALIGN_H = @STDALIGN_H@
+STDARG_H = @STDARG_H@
+STDBOOL_H = @STDBOOL_H@
+STDDEF_H = @STDDEF_H@
+STDINT_H = @STDINT_H@
+STRIP = @STRIP@
+SYS_IOCTL_H_HAVE_WINSOCK2_H = @SYS_IOCTL_H_HAVE_WINSOCK2_H@
+SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS = @SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
+SYS_TIME_H_DEFINES_STRUCT_TIMESPEC = @SYS_TIME_H_DEFINES_STRUCT_TIMESPEC@
+TIME_H_DEFINES_STRUCT_TIMESPEC = @TIME_H_DEFINES_STRUCT_TIMESPEC@
+TIME_H_DEFINES_TIME_UTC = @TIME_H_DEFINES_TIME_UTC@
+UINT32_MAX_LT_UINTMAX_MAX = @UINT32_MAX_LT_UINTMAX_MAX@
+UINT64_MAX_EQ_ULONG_MAX = @UINT64_MAX_EQ_ULONG_MAX@
+UNDEFINE_STRTOK_R = @UNDEFINE_STRTOK_R@
+UNISTD_H_DEFINES_STRUCT_TIMESPEC = @UNISTD_H_DEFINES_STRUCT_TIMESPEC@
+UNISTD_H_HAVE_SYS_RANDOM_H = @UNISTD_H_HAVE_SYS_RANDOM_H@
+UNISTD_H_HAVE_WINSOCK2_H = @UNISTD_H_HAVE_WINSOCK2_H@
+UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS = @UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
+USE_NLS = @USE_NLS@
+VERSION = @VERSION@
+WARN_CFLAGS = @WARN_CFLAGS@
+WCHAR_T_SUFFIX = @WCHAR_T_SUFFIX@
+WERROR_CFLAGS = @WERROR_CFLAGS@
+WINDOWS_64_BIT_OFF_T = @WINDOWS_64_BIT_OFF_T@
+WINDOWS_64_BIT_ST_SIZE = @WINDOWS_64_BIT_ST_SIZE@
+WINDOWS_STAT_INODES = @WINDOWS_STAT_INODES@
+WINDOWS_STAT_TIMESPEC = @WINDOWS_STAT_TIMESPEC@
+WINT_T_SUFFIX = @WINT_T_SUFFIX@
+XGETTEXT = @XGETTEXT@
+XGETTEXT_015 = @XGETTEXT_015@
+XGETTEXT_EXTRA_OPTIONS = @XGETTEXT_EXTRA_OPTIONS@
+abs_aux_dir = @abs_aux_dir@
+abs_builddir = @abs_builddir@
+abs_srcdir = @abs_srcdir@
+abs_top_builddir = @abs_top_builddir@
+abs_top_srcdir = @abs_top_srcdir@
+ac_ct_CC = @ac_ct_CC@
+am__include = @am__include@
+am__leading_dot = @am__leading_dot@
+am__quote = @am__quote@
+am__tar = @am__tar@
+am__untar = @am__untar@
+bindir = @bindir@
+build = @build@
+build_alias = @build_alias@
+build_cpu = @build_cpu@
+build_os = @build_os@
+build_vendor = @build_vendor@
+builddir = @builddir@
+datadir = @datadir@
+datarootdir = @datarootdir@
+docdir = @docdir@
+dvidir = @dvidir@
+exec_prefix = @exec_prefix@
+gl_LIBOBJS = @gl_LIBOBJS@
+gl_LTLIBOBJS = @gl_LTLIBOBJS@
+gltests_LIBOBJS = @gltests_LIBOBJS@
+gltests_LTLIBOBJS = @gltests_LTLIBOBJS@
+gltests_WITNESS = @gltests_WITNESS@
+host = @host@
+host_alias = @host_alias@
+host_cpu = @host_cpu@
+host_os = @host_os@
+host_vendor = @host_vendor@
+htmldir = @htmldir@
+includedir = @includedir@
+infodir = @infodir@
+install_sh = @install_sh@
+libdir = @libdir@
+libexecdir = @libexecdir@
+lispdir = @lispdir@
+localedir = @localedir@
+localstatedir = @localstatedir@
+mandir = @mandir@
+mkdir_p = @mkdir_p@
+oldincludedir = @oldincludedir@
+pdfdir = @pdfdir@
+prefix = @prefix@
+program_transform_name = @program_transform_name@
+psdir = @psdir@
+runstatedir = @runstatedir@
+sbindir = @sbindir@
+sharedstatedir = @sharedstatedir@
+srcdir = @srcdir@
+sysconfdir = @sysconfdir@
+target_alias = @target_alias@
+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+AM_CFLAGS = $(GNULIB_TEST_WARN_CFLAGS) $(WERROR_CFLAGS)
+AUTOMAKE_OPTIONS = 1.11 foreign subdir-objects
+SUBDIRS = .
+TESTS_ENVIRONMENT = EXEEXT='@EXEEXT@' srcdir='$(srcdir)' \
+	LOCALE_FR='@LOCALE_FR@' LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' \
+	LIBSIGSEGV='@LIBSIGSEGV@' LOCALE_FR='@LOCALE_FR@' \
+	LOCALE_TR_UTF8='@LOCALE_TR_UTF8@' LOCALE_FR='@LOCALE_FR@' \
+	LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' LOCALE_JA='@LOCALE_JA@' \
+	LOCALE_ZH_CN='@LOCALE_ZH_CN@' LOCALE_FR='@LOCALE_FR@' \
+	LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' LOCALE_JA='@LOCALE_JA@' \
+	LOCALE_ZH_CN='@LOCALE_ZH_CN@' \
+	LOCALE_TR_UTF8='@LOCALE_TR_UTF8@' \
+	LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' LOCALE_FR='@LOCALE_FR@' \
+	LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' LOCALE_JA='@LOCALE_JA@' \
+	LOCALE_ZH_CN='@LOCALE_ZH_CN@' \
+	LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' \
+	LOCALE_ZH_CN='@LOCALE_ZH_CN@' LOCALE_FR='@LOCALE_FR@' \
+	LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' LOCALE_FR='@LOCALE_FR@' \
+	LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' LOCALE_JA='@LOCALE_JA@' \
+	LOCALE_ZH_CN='@LOCALE_ZH_CN@' abs_aux_dir='$(abs_aux_dir)' \
+	MAKE='$(MAKE)' LOCALE_FR='@LOCALE_FR@' \
+	LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' LOCALE_JA='@LOCALE_JA@' \
+	LOCALE_ZH_CN='@LOCALE_ZH_CN@'
+noinst_HEADERS = 
+noinst_LIBRARIES = 
+check_LIBRARIES = libtests.a
+EXTRA_DIST = accept.c w32sock.h test-accept.c signature.h macros.h \
+	test-alignof.c test-alloca-opt.c test-argmatch.c macros.h \
+	arpa_inet.in.h test-arpa_inet.c test-binary-io.sh \
+	test-binary-io.c macros.h bind.c w32sock.h test-bind.c \
+	signature.h macros.h test-bitrotate.c macros.h test-btowc1.sh \
+	test-btowc2.sh test-btowc.c signature.h macros.h \
+	test-c-ctype.c macros.h test-c-stack.c test-c-stack.sh \
+	test-c-stack2.sh macros.h test-c-strcase.sh \
+	test-c-strcasecmp.c test-c-strncasecmp.c macros.h \
+	test-calloc-gnu.c macros.h test-chdir.c signature.h macros.h \
+	test-cloexec.c macros.h test-close.c signature.h macros.h \
+	connect.c w32sock.h test-connect.c signature.h macros.h \
+	test-ctype.c test-dfa-match.sh test-dfa-match-aux.c \
+	test-dfa-invalid-char-class.sh test-dfa-invalid-merge.sh \
+	test-dirent.c test-dup.c signature.h macros.h test-dup2.c \
+	signature.h macros.h test-dynarray.c macros.h test-environ.c \
+	test-errno.c test-exclude.c test-exclude1.sh test-exclude2.sh \
+	test-exclude3.sh test-exclude4.sh test-exclude5.sh \
+	test-exclude6.sh test-exclude7.sh test-exclude8.sh \
+	test-fchdir.c signature.h macros.h test-fcntl-h.c test-open.h \
+	test-fcntl-safer.c macros.h test-fcntl.c signature.h macros.h \
+	fdopen.c test-fdopen.c signature.h macros.h test-fdopendir.c \
+	signature.h macros.h test-fgetc.c signature.h macros.h float.c \
+	float.in.h itold.c test-float.c macros.h test-fnmatch-h.c \
+	test-fnmatch.c signature.h macros.h test-fopen-gnu.c macros.h \
+	test-fopen.h test-fopen.c signature.h macros.h test-fpending.c \
+	test-fpending.sh macros.h fpucw.h test-fputc.c signature.h \
+	macros.h test-fread.c signature.h macros.h test-free.c \
+	macros.h test-fstat.c signature.h macros.h test-fstatat.c \
+	test-lstat.h test-stat.h signature.h macros.h ftruncate.c \
+	test-ftruncate.c test-ftruncate.sh signature.h macros.h \
+	test-fwrite.c signature.h macros.h test-getcwd-lgpl.c \
+	signature.h macros.h test-getdtablesize.c signature.h macros.h \
+	macros.h signature.h test-getopt-gnu.c test-getopt-main.h \
+	test-getopt.h test-getopt_long.h macros.h signature.h \
+	test-getopt-posix.c test-getopt-main.h test-getopt.h \
+	test-getprogname.c gettimeofday.c signature.h \
+	test-gettimeofday.c test-hard-locale.c locale.c test-hash.c \
+	macros.h test-i-ring.c macros.h test-iconv-h.c test-iconv.c \
+	signature.h macros.h test-ignore-value.c inet_pton.c \
+	test-inet_pton.c signature.h macros.h test-intprops.c macros.h \
+	anytostr.c inttostr.h macros.h test-inttostr.c test-inttypes.c \
+	ioctl.c w32sock.h test-ioctl.c signature.h macros.h \
+	test-isatty.c signature.h macros.h test-isblank.c signature.h \
+	macros.h test-iswblank.c macros.h test-iswdigit.sh \
+	test-iswdigit.c signature.h macros.h test-iswxdigit.sh \
+	test-iswxdigit.c signature.h macros.h test-langinfo.c \
+	test-limits-h.c listen.c w32sock.h test-listen.c signature.h \
+	macros.h test-localcharset.c test-locale.c test-localeconv.c \
+	signature.h macros.h localename-table.h localename.h \
+	test-localename.c macros.h test-lseek.c test-lseek.sh \
+	signature.h macros.h test-lstat.h test-lstat.c signature.h \
+	macros.h test-malloc-gnu.c macros.h test-malloca.c \
+	test-mbscasecmp.sh test-mbscasecmp.c macros.h test-mbsinit.sh \
+	test-mbsinit.c signature.h macros.h test-mbsrtowcs1.sh \
+	test-mbsrtowcs2.sh test-mbsrtowcs3.sh test-mbsrtowcs4.sh \
+	test-mbsrtowcs.c signature.h macros.h test-mbsstr1.c \
+	test-mbsstr2.sh test-mbsstr2.c test-mbsstr3.sh test-mbsstr3.c \
+	macros.h test-memchr.c zerosize-ptr.h signature.h macros.h \
+	test-memchr2.c zerosize-ptr.h macros.h test-memrchr.c \
+	zerosize-ptr.h signature.h macros.h nanosleep.c \
+	test-nanosleep.c signature.h macros.h netinet_in.in.h \
+	test-netinet_in.c test-nl_langinfo.sh test-nl_langinfo.c \
+	test-nl_langinfo-mt.c signature.h macros.h test-open.h \
+	test-open.c signature.h macros.h test-openat-safer.c macros.h \
+	test-openat.c test-open.h signature.h macros.h test-pathmax.c \
+	perror.c macros.h signature.h test-perror.c test-perror2.c \
+	test-perror.sh test-pipe.c signature.h macros.h pthread.in.h \
+	test-pthread.c pthread-thread.c test-pthread-thread.c macros.h \
+	pthread_sigmask.c test-pthread_sigmask1.c \
+	test-pthread_sigmask2.c signature.h macros.h putenv.c \
+	test-quotearg-simple.c test-quotearg.h macros.h zerosize-ptr.h \
+	test-raise.c signature.h macros.h test-rawmemchr.c \
+	zerosize-ptr.h signature.h macros.h test-read.c signature.h \
+	macros.h test-realloc-gnu.c macros.h test-reallocarray.c \
+	signature.h macros.h test-regex.c macros.h sched.in.h \
+	test-sched.c select.c macros.h signature.h test-select.c \
+	test-select.h test-select-fd.c test-select-in.sh \
+	test-select-out.sh test-select-stdin.c setenv.c test-setenv.c \
+	signature.h macros.h setlocale.c test-setlocale_null.c \
+	test-setlocale_null-mt-one.c test-setlocale_null-mt-all.c \
+	test-setlocale1.sh test-setlocale1.c test-setlocale2.sh \
+	test-setlocale2.c signature.h macros.h setsockopt.c w32sock.h \
+	test-setsockopt.c signature.h macros.h sig-handler.h \
+	sigaction.c test-sigaction.c signature.h macros.h \
+	test-signal-h.c sigprocmask.c test-sigprocmask.c signature.h \
+	macros.h test-sigsegv-catch-segv1.c test-sigsegv-catch-segv2.c \
+	test-sigsegv-catch-stackoverflow1.c \
+	test-sigsegv-catch-stackoverflow2.c altstack-util.h \
+	mmap-anon-util.h sleep.c test-sleep.c signature.h macros.h \
+	_Noreturn.h arg-nonnull.h c++defs.h warn-on-use.h snprintf.c \
+	test-snprintf.c signature.h macros.h socket.c w32sock.h \
+	w32sock.h test-sockets.c test-stat.h test-stat.c signature.h \
+	macros.h test-stat-time.c macros.h nap.h test-stdalign.c \
+	macros.h test-stdbool.c test-stddef.c test-stdint.c \
+	test-stdio.c test-stdlib.c test-sys_wait.h test-strerror.c \
+	signature.h macros.h strerror_r.c test-strerror_r.c \
+	signature.h macros.h test-striconv.c macros.h test-string.c \
+	test-strnlen.c zerosize-ptr.h signature.h macros.h \
+	test-strstr.c zerosize-ptr.h signature.h macros.h \
+	test-strtoimax.c signature.h macros.h test-strtoll.c \
+	signature.h macros.h test-strtoull.c signature.h macros.h \
+	test-strtoumax.c signature.h macros.h symlink.c test-symlink.h \
+	test-symlink.c signature.h macros.h sys_ioctl.in.h \
+	test-sys_ioctl.c sys_select.in.h test-sys_select.c signature.h \
+	sys_socket.in.h test-sys_socket.c test-sys_stat.c \
+	sys_time.in.h test-sys_time.c test-sys_types.c sys_uio.in.h \
+	test-sys_uio.c init.sh test-init.sh thread-optim.h \
+	test-thread_self.c test-thread_create.c macros.h test-time.c \
+	test-dup-safer.c macros.h test-unistd.c \
+	unistr/test-u8-mbtoucr.c macros.h unistr/test-u8-uctomb.c \
+	macros.h uniwidth/test-uc_width.c uniwidth/test-uc_width2.c \
+	uniwidth/test-uc_width2.sh macros.h unsetenv.c test-unsetenv.c \
+	signature.h macros.h asnprintf.c float+.h printf-args.c \
+	printf-args.h printf-parse.c printf-parse.h vasnprintf.c \
+	vasnprintf.h test-vasnprintf.c macros.h \
+	test-vc-list-files-git.sh test-vc-list-files-cvs.sh \
+	test-verify.c test-verify-try.c test-verify.sh \
+	test-version-etc.c test-version-etc.sh test-wchar.c \
+	test-wcrtomb.sh test-wcrtomb.c test-wcrtomb-w32-1.sh \
+	test-wcrtomb-w32-2.sh test-wcrtomb-w32-3.sh \
+	test-wcrtomb-w32-4.sh test-wcrtomb-w32-5.sh \
+	test-wcrtomb-w32-6.sh test-wcrtomb-w32-7.sh test-wcrtomb-w32.c \
+	signature.h macros.h test-wctype-h.c macros.h test-wcwidth.c \
+	signature.h macros.h windows-thread.c windows-thread.h \
+	windows-tls.c windows-tls.h test-xalloc-die.c \
+	test-xalloc-die.sh test-xstrtoimax.c test-xstrtoimax.sh \
+	xstrtol-error.h test-xstrtol.c test-xstrtoul.c test-xstrtol.sh
+BUILT_SOURCES = arpa/inet.h $(FLOAT_H) $(NETINET_IN_H) pthread.h \
+	sched.h sys/ioctl.h sys/select.h sys/socket.h sys/time.h \
+	sys/uio.h
+SUFFIXES = 
+
+# This test expects compilation of test-verify-try.c to fail, and
+# each time it fails, the makefile rule does not perform the usual
+#  "mv -f $name.Tpo $name.po, so tell make clean to remove that file.
+MOSTLYCLEANFILES = core *.stackdump arpa/inet.h arpa/inet.h-t \
+	t-c-stack.tmp t-c-stack2.tmp float.h float.h-t test-fpending.t \
+	netinet/in.h netinet/in.h-t pthread.h pthread.h-t sched.h \
+	sched.h-t sys/ioctl.h sys/ioctl.h-t sys/select.h \
+	sys/select.h-t sys/socket.h sys/socket.h-t sys/time.h \
+	sys/time.h-t sys/uio.h sys/uio.h-t .deps/test-verify-try.Tpo
+MOSTLYCLEANDIRS = arpa netinet sys sys sys sys
+CLEANFILES = 
+DISTCLEANFILES = 
+MAINTAINERCLEANFILES = 
+CXXFLAGS = @GL_CXXFLAG_ALLOW_WARNINGS@ @CXXFLAGS@
+AM_CPPFLAGS = \
+  -D@gltests_WITNESS@=1 \
+  -I. -I$(srcdir) \
+  -I.. -I$(srcdir)/.. \
+  -I../lib -I$(srcdir)/../lib
+
+LDADD = libtests.a ../lib/libgreputils.a libtests.a ../lib/libgreputils.a libtests.a $(LIBTESTS_LIBDEPS)
+libtests_a_SOURCES = hash-pjw.h hash-pjw.c imaxtostr.c inttostr.c \
+	offtostr.c uinttostr.c umaxtostr.c localename.c \
+	localename-table.c sig-handler.c size_max.h sockets.h \
+	sockets.c sys_socket.c glthread/thread.h glthread/thread.c \
+	xsize.h xsize.c xstrtol-error.c
+libtests_a_LIBADD = $(gltests_LIBOBJS)
+libtests_a_DEPENDENCIES = $(gltests_LIBOBJS)
+EXTRA_libtests_a_SOURCES = accept.c bind.c connect.c fdopen.c float.c \
+	itold.c ftruncate.c gettimeofday.c inet_pton.c anytostr.c \
+	ioctl.c listen.c nanosleep.c perror.c pthread-thread.c \
+	pthread_sigmask.c putenv.c select.c setenv.c setlocale.c \
+	setsockopt.c sigaction.c sigprocmask.c sleep.c snprintf.c \
+	socket.c strerror_r.c symlink.c unsetenv.c asnprintf.c \
+	printf-args.c printf-parse.c vasnprintf.c windows-thread.c \
+	windows-tls.c
+AM_LIBTOOLFLAGS = --preserve-dup-deps
+test_accept_LDADD = $(LDADD) @LIBSOCKET@
+test_argmatch_LDADD = $(LDADD) @LIBINTL@ $(LIB_MBRTOWC)
+test_bind_LDADD = $(LDADD) @LIBSOCKET@ $(INET_PTON_LIB)
+test_btowc_LDADD = $(LDADD) $(LIB_SETLOCALE)
+test_c_ctype_LDADD = $(LDADD) $(LIB_SETLOCALE)
+test_c_stack_LDADD = $(LDADD) $(LIBCSTACK) @LIBINTL@
+test_c_strcasecmp_LDADD = $(LDADD) $(LIB_SETLOCALE)
+test_c_strncasecmp_LDADD = $(LDADD) $(LIB_SETLOCALE)
+test_connect_LDADD = $(LDADD) @LIBSOCKET@ $(INET_PTON_LIB)
+test_dfa_match_aux_LDADD = $(LDADD) $(LIB_SETLOCALE) @LIBINTL@ $(LIB_MBRTOWC)
+test_exclude_LDADD = $(LDADD) $(LIBUNISTRING) @LIBINTL@ $(LIB_MBRTOWC) $(LIBTHREAD)
+test_fchdir_LDADD = $(LDADD) $(LIBINTL)
+test_fdopendir_LDADD = $(LDADD) @LIBINTL@
+test_fnmatch_LDADD = $(LDADD) $(LIB_MBRTOWC)
+test_fstatat_LDADD = $(LDADD) @LIBINTL@
+test_getcwd_lgpl_LDADD = $(LDADD) $(LIBINTL)
+test_getopt_gnu_LDADD = $(LDADD) $(LIBINTL)
+test_getopt_posix_LDADD = $(LDADD) $(LIBINTL)
+test_getprogname_LDADD = $(LDADD)
+GPERF = gperf
+V_GPERF = $(V_GPERF_@AM_V@)
+V_GPERF_ = $(V_GPERF_@AM_DEFAULT_V@)
+V_GPERF_0 = @echo "  GPERF   " $@;
+test_hard_locale_LDADD = $(LDADD) $(LIB_SETLOCALE) @LIB_HARD_LOCALE@
+current_locale_SOURCES = locale.c
+test_iconv_LDADD = $(LDADD) @LIBICONV@
+test_inet_pton_LDADD = $(LDADD) @INET_PTON_LIB@
+test_iswdigit_LDADD = $(LDADD) $(LIB_SETLOCALE) $(LIB_MBRTOWC)
+test_iswxdigit_LDADD = $(LDADD) $(LIB_SETLOCALE) $(LIB_MBRTOWC)
+test_listen_LDADD = $(LDADD) @LIBSOCKET@
+test_localcharset_LDADD = $(LDADD) $(LIB_SETLOCALE)
+test_localename_LDADD = $(LDADD) $(LIB_SETLOCALE) @INTL_MACOSX_LIBS@ $(LIBTHREAD)
+test_mbscasecmp_LDADD = $(LDADD) $(LIBUNISTRING) $(LIB_SETLOCALE) $(LIB_MBRTOWC)
+test_mbsinit_LDADD = $(LDADD) $(LIB_SETLOCALE) $(LIB_MBRTOWC)
+test_mbsrtowcs_LDADD = $(LDADD) $(LIB_SETLOCALE) $(LIB_MBRTOWC)
+test_mbsstr1_LDADD = $(LDADD) $(LIBUNISTRING) $(LIB_MBRTOWC)
+test_mbsstr2_LDADD = $(LDADD) $(LIBUNISTRING) $(LIB_SETLOCALE) $(LIB_MBRTOWC)
+test_mbsstr3_LDADD = $(LDADD) $(LIBUNISTRING) $(LIB_SETLOCALE) $(LIB_MBRTOWC)
+test_nanosleep_LDADD = $(LDADD) $(LIB_NANOSLEEP)
+test_nl_langinfo_LDADD = $(LDADD) $(LIB_SETLOCALE)
+test_nl_langinfo_mt_LDADD = $(LDADD) $(LIB_SETLOCALE) $(LIBMULTITHREAD) $(LIB_NANOSLEEP)
+test_openat_safer_LDADD = $(LDADD) @LIBINTL@
+test_openat_LDADD = $(LDADD) @LIBINTL@
+test_pthread_thread_LDADD = $(LDADD) @LIBPMULTITHREAD@
+test_pthread_sigmask1_LDADD = $(LDADD) @LIB_PTHREAD_SIGMASK@
+test_pthread_sigmask2_LDADD = $(LDADD) @LIB_PTHREAD_SIGMASK@ @LIBMULTITHREAD@
+test_quotearg_simple_LDADD = $(LDADD) @LIBINTL@ $(LIB_MBRTOWC)
+test_regex_LDADD = $(LDADD) $(LIB_SETLOCALE) $(LIB_MBRTOWC) @LIBINTL@ $(LIBTHREAD)
+test_select_LDADD = $(LDADD) @LIB_SELECT@ @LIBSOCKET@ $(INET_PTON_LIB)
+test_select_fd_LDADD = $(LDADD) @LIB_SELECT@
+test_select_stdin_LDADD = $(LDADD) @LIB_SELECT@
+test_setlocale_null_LDADD = $(LDADD) @LIB_SETLOCALE_NULL@
+test_setlocale_null_mt_one_LDADD = $(LDADD) @LIB_SETLOCALE_NULL@ $(LIBMULTITHREAD) $(LIB_NANOSLEEP)
+test_setlocale_null_mt_all_LDADD = $(LDADD) @LIB_SETLOCALE_NULL@ $(LIBMULTITHREAD) $(LIB_NANOSLEEP)
+test_setlocale1_LDADD = $(LDADD) @LIB_SETLOCALE@
+test_setlocale2_LDADD = $(LDADD) @LIB_SETLOCALE@
+test_setsockopt_LDADD = $(LDADD) @LIBSOCKET@
+test_sigsegv_catch_segv1_LDADD = $(LDADD) $(LIBSIGSEGV)
+test_sigsegv_catch_segv2_LDADD = $(LDADD) $(LIBSIGSEGV)
+test_sigsegv_catch_stackoverflow1_LDADD = $(LDADD) $(LIBSIGSEGV)
+test_sigsegv_catch_stackoverflow2_LDADD = $(LDADD) $(LIBSIGSEGV)
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+_NORETURN_H = $(srcdir)/_Noreturn.h
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+ARG_NONNULL_H = $(srcdir)/arg-nonnull.h
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+CXXDEFS_H = $(srcdir)/c++defs.h
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+WARN_ON_USE_H = $(srcdir)/warn-on-use.h
+test_sockets_LDADD = $(LDADD) @LIBSOCKET@
+test_stat_LDADD = $(LDADD) $(LIBINTL)
+test_stat_time_LDADD = $(LDADD) $(LIB_NANOSLEEP)
+test_striconv_LDADD = $(LDADD) @LIBICONV@
+test_thread_self_LDADD = $(LDADD) @LIBTHREAD@
+test_thread_create_LDADD = $(LDADD) @LIBMULTITHREAD@
+test_u8_mbtoucr_SOURCES = unistr/test-u8-mbtoucr.c
+test_u8_mbtoucr_LDADD = $(LDADD) $(LIBUNISTRING)
+test_u8_uctomb_SOURCES = unistr/test-u8-uctomb.c
+test_u8_uctomb_LDADD = $(LDADD) $(LIBUNISTRING)
+test_uc_width_SOURCES = uniwidth/test-uc_width.c
+test_uc_width_LDADD = $(LDADD) $(LIBUNISTRING)
+test_uc_width2_SOURCES = uniwidth/test-uc_width2.c
+test_uc_width2_LDADD = $(LDADD) $(LIBUNISTRING)
+test_version_etc_LDADD = $(LDADD) @LIBINTL@
+test_wcrtomb_LDADD = $(LDADD) $(LIB_SETLOCALE)
+test_wcwidth_LDADD = $(LDADD) $(LIB_SETLOCALE) $(LIBUNISTRING)
+test_xalloc_die_LDADD = $(LDADD) @LIBINTL@
+test_xstrtoimax_LDADD = $(LDADD) @LIBINTL@
+test_xstrtol_LDADD = $(LDADD) @LIBINTL@
+test_xstrtoul_LDADD = $(LDADD) @LIBINTL@
+all: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) all-recursive
+
+.SUFFIXES:
+.SUFFIXES: .c .log .o .obj .test .test$(EXEEXT) .trs
+$(srcdir)/Makefile.in:  $(srcdir)/Makefile.am $(srcdir)/gnulib.mk $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --foreign gnulib-tests/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --foreign gnulib-tests/Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles);; \
+	esac;
+$(srcdir)/gnulib.mk $(am__empty):
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure:  $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4):  $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+clean-checkPROGRAMS:
+	-test -z "$(check_PROGRAMS)" || rm -f $(check_PROGRAMS)
+
+clean-noinstPROGRAMS:
+	-test -z "$(noinst_PROGRAMS)" || rm -f $(noinst_PROGRAMS)
+
+clean-checkLIBRARIES:
+	-test -z "$(check_LIBRARIES)" || rm -f $(check_LIBRARIES)
+
+clean-noinstLIBRARIES:
+	-test -z "$(noinst_LIBRARIES)" || rm -f $(noinst_LIBRARIES)
+glthread/$(am__dirstamp):
+	@$(MKDIR_P) glthread
+	@: > glthread/$(am__dirstamp)
+glthread/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) glthread/$(DEPDIR)
+	@: > glthread/$(DEPDIR)/$(am__dirstamp)
+glthread/thread.$(OBJEXT): glthread/$(am__dirstamp) \
+	glthread/$(DEPDIR)/$(am__dirstamp)
+
+libtests.a: $(libtests_a_OBJECTS) $(libtests_a_DEPENDENCIES) $(EXTRA_libtests_a_DEPENDENCIES) 
+	$(AM_V_at)-rm -f libtests.a
+	$(AM_V_AR)$(libtests_a_AR) libtests.a $(libtests_a_OBJECTS) $(libtests_a_LIBADD)
+	$(AM_V_at)$(RANLIB) libtests.a
+
+current-locale$(EXEEXT): $(current_locale_OBJECTS) $(current_locale_DEPENDENCIES) $(EXTRA_current_locale_DEPENDENCIES) 
+	@rm -f current-locale$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(current_locale_OBJECTS) $(current_locale_LDADD) $(LIBS)
+
+test-accept$(EXEEXT): $(test_accept_OBJECTS) $(test_accept_DEPENDENCIES) $(EXTRA_test_accept_DEPENDENCIES) 
+	@rm -f test-accept$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_accept_OBJECTS) $(test_accept_LDADD) $(LIBS)
+
+test-alignof$(EXEEXT): $(test_alignof_OBJECTS) $(test_alignof_DEPENDENCIES) $(EXTRA_test_alignof_DEPENDENCIES) 
+	@rm -f test-alignof$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_alignof_OBJECTS) $(test_alignof_LDADD) $(LIBS)
+
+test-alloca-opt$(EXEEXT): $(test_alloca_opt_OBJECTS) $(test_alloca_opt_DEPENDENCIES) $(EXTRA_test_alloca_opt_DEPENDENCIES) 
+	@rm -f test-alloca-opt$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_alloca_opt_OBJECTS) $(test_alloca_opt_LDADD) $(LIBS)
+
+test-argmatch$(EXEEXT): $(test_argmatch_OBJECTS) $(test_argmatch_DEPENDENCIES) $(EXTRA_test_argmatch_DEPENDENCIES) 
+	@rm -f test-argmatch$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_argmatch_OBJECTS) $(test_argmatch_LDADD) $(LIBS)
+
+test-arpa_inet$(EXEEXT): $(test_arpa_inet_OBJECTS) $(test_arpa_inet_DEPENDENCIES) $(EXTRA_test_arpa_inet_DEPENDENCIES) 
+	@rm -f test-arpa_inet$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_arpa_inet_OBJECTS) $(test_arpa_inet_LDADD) $(LIBS)
+
+test-binary-io$(EXEEXT): $(test_binary_io_OBJECTS) $(test_binary_io_DEPENDENCIES) $(EXTRA_test_binary_io_DEPENDENCIES) 
+	@rm -f test-binary-io$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_binary_io_OBJECTS) $(test_binary_io_LDADD) $(LIBS)
+
+test-bind$(EXEEXT): $(test_bind_OBJECTS) $(test_bind_DEPENDENCIES) $(EXTRA_test_bind_DEPENDENCIES) 
+	@rm -f test-bind$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_bind_OBJECTS) $(test_bind_LDADD) $(LIBS)
+
+test-bitrotate$(EXEEXT): $(test_bitrotate_OBJECTS) $(test_bitrotate_DEPENDENCIES) $(EXTRA_test_bitrotate_DEPENDENCIES) 
+	@rm -f test-bitrotate$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_bitrotate_OBJECTS) $(test_bitrotate_LDADD) $(LIBS)
+
+test-btowc$(EXEEXT): $(test_btowc_OBJECTS) $(test_btowc_DEPENDENCIES) $(EXTRA_test_btowc_DEPENDENCIES) 
+	@rm -f test-btowc$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_btowc_OBJECTS) $(test_btowc_LDADD) $(LIBS)
+
+test-c-ctype$(EXEEXT): $(test_c_ctype_OBJECTS) $(test_c_ctype_DEPENDENCIES) $(EXTRA_test_c_ctype_DEPENDENCIES) 
+	@rm -f test-c-ctype$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_c_ctype_OBJECTS) $(test_c_ctype_LDADD) $(LIBS)
+
+test-c-stack$(EXEEXT): $(test_c_stack_OBJECTS) $(test_c_stack_DEPENDENCIES) $(EXTRA_test_c_stack_DEPENDENCIES) 
+	@rm -f test-c-stack$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_c_stack_OBJECTS) $(test_c_stack_LDADD) $(LIBS)
+
+test-c-strcasecmp$(EXEEXT): $(test_c_strcasecmp_OBJECTS) $(test_c_strcasecmp_DEPENDENCIES) $(EXTRA_test_c_strcasecmp_DEPENDENCIES) 
+	@rm -f test-c-strcasecmp$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_c_strcasecmp_OBJECTS) $(test_c_strcasecmp_LDADD) $(LIBS)
+
+test-c-strncasecmp$(EXEEXT): $(test_c_strncasecmp_OBJECTS) $(test_c_strncasecmp_DEPENDENCIES) $(EXTRA_test_c_strncasecmp_DEPENDENCIES) 
+	@rm -f test-c-strncasecmp$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_c_strncasecmp_OBJECTS) $(test_c_strncasecmp_LDADD) $(LIBS)
+
+test-calloc-gnu$(EXEEXT): $(test_calloc_gnu_OBJECTS) $(test_calloc_gnu_DEPENDENCIES) $(EXTRA_test_calloc_gnu_DEPENDENCIES) 
+	@rm -f test-calloc-gnu$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_calloc_gnu_OBJECTS) $(test_calloc_gnu_LDADD) $(LIBS)
+
+test-chdir$(EXEEXT): $(test_chdir_OBJECTS) $(test_chdir_DEPENDENCIES) $(EXTRA_test_chdir_DEPENDENCIES) 
+	@rm -f test-chdir$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_chdir_OBJECTS) $(test_chdir_LDADD) $(LIBS)
+
+test-cloexec$(EXEEXT): $(test_cloexec_OBJECTS) $(test_cloexec_DEPENDENCIES) $(EXTRA_test_cloexec_DEPENDENCIES) 
+	@rm -f test-cloexec$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_cloexec_OBJECTS) $(test_cloexec_LDADD) $(LIBS)
+
+test-close$(EXEEXT): $(test_close_OBJECTS) $(test_close_DEPENDENCIES) $(EXTRA_test_close_DEPENDENCIES) 
+	@rm -f test-close$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_close_OBJECTS) $(test_close_LDADD) $(LIBS)
+
+test-connect$(EXEEXT): $(test_connect_OBJECTS) $(test_connect_DEPENDENCIES) $(EXTRA_test_connect_DEPENDENCIES) 
+	@rm -f test-connect$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_connect_OBJECTS) $(test_connect_LDADD) $(LIBS)
+
+test-ctype$(EXEEXT): $(test_ctype_OBJECTS) $(test_ctype_DEPENDENCIES) $(EXTRA_test_ctype_DEPENDENCIES) 
+	@rm -f test-ctype$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_ctype_OBJECTS) $(test_ctype_LDADD) $(LIBS)
+
+test-dfa-match-aux$(EXEEXT): $(test_dfa_match_aux_OBJECTS) $(test_dfa_match_aux_DEPENDENCIES) $(EXTRA_test_dfa_match_aux_DEPENDENCIES) 
+	@rm -f test-dfa-match-aux$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_dfa_match_aux_OBJECTS) $(test_dfa_match_aux_LDADD) $(LIBS)
+
+test-dirent$(EXEEXT): $(test_dirent_OBJECTS) $(test_dirent_DEPENDENCIES) $(EXTRA_test_dirent_DEPENDENCIES) 
+	@rm -f test-dirent$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_dirent_OBJECTS) $(test_dirent_LDADD) $(LIBS)
+
+test-dup$(EXEEXT): $(test_dup_OBJECTS) $(test_dup_DEPENDENCIES) $(EXTRA_test_dup_DEPENDENCIES) 
+	@rm -f test-dup$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_dup_OBJECTS) $(test_dup_LDADD) $(LIBS)
+
+test-dup-safer$(EXEEXT): $(test_dup_safer_OBJECTS) $(test_dup_safer_DEPENDENCIES) $(EXTRA_test_dup_safer_DEPENDENCIES) 
+	@rm -f test-dup-safer$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_dup_safer_OBJECTS) $(test_dup_safer_LDADD) $(LIBS)
+
+test-dup2$(EXEEXT): $(test_dup2_OBJECTS) $(test_dup2_DEPENDENCIES) $(EXTRA_test_dup2_DEPENDENCIES) 
+	@rm -f test-dup2$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_dup2_OBJECTS) $(test_dup2_LDADD) $(LIBS)
+
+test-dynarray$(EXEEXT): $(test_dynarray_OBJECTS) $(test_dynarray_DEPENDENCIES) $(EXTRA_test_dynarray_DEPENDENCIES) 
+	@rm -f test-dynarray$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_dynarray_OBJECTS) $(test_dynarray_LDADD) $(LIBS)
+
+test-environ$(EXEEXT): $(test_environ_OBJECTS) $(test_environ_DEPENDENCIES) $(EXTRA_test_environ_DEPENDENCIES) 
+	@rm -f test-environ$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_environ_OBJECTS) $(test_environ_LDADD) $(LIBS)
+
+test-errno$(EXEEXT): $(test_errno_OBJECTS) $(test_errno_DEPENDENCIES) $(EXTRA_test_errno_DEPENDENCIES) 
+	@rm -f test-errno$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_errno_OBJECTS) $(test_errno_LDADD) $(LIBS)
+
+test-exclude$(EXEEXT): $(test_exclude_OBJECTS) $(test_exclude_DEPENDENCIES) $(EXTRA_test_exclude_DEPENDENCIES) 
+	@rm -f test-exclude$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_exclude_OBJECTS) $(test_exclude_LDADD) $(LIBS)
+
+test-fchdir$(EXEEXT): $(test_fchdir_OBJECTS) $(test_fchdir_DEPENDENCIES) $(EXTRA_test_fchdir_DEPENDENCIES) 
+	@rm -f test-fchdir$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fchdir_OBJECTS) $(test_fchdir_LDADD) $(LIBS)
+
+test-fcntl$(EXEEXT): $(test_fcntl_OBJECTS) $(test_fcntl_DEPENDENCIES) $(EXTRA_test_fcntl_DEPENDENCIES) 
+	@rm -f test-fcntl$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fcntl_OBJECTS) $(test_fcntl_LDADD) $(LIBS)
+
+test-fcntl-h$(EXEEXT): $(test_fcntl_h_OBJECTS) $(test_fcntl_h_DEPENDENCIES) $(EXTRA_test_fcntl_h_DEPENDENCIES) 
+	@rm -f test-fcntl-h$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fcntl_h_OBJECTS) $(test_fcntl_h_LDADD) $(LIBS)
+
+test-fcntl-safer$(EXEEXT): $(test_fcntl_safer_OBJECTS) $(test_fcntl_safer_DEPENDENCIES) $(EXTRA_test_fcntl_safer_DEPENDENCIES) 
+	@rm -f test-fcntl-safer$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fcntl_safer_OBJECTS) $(test_fcntl_safer_LDADD) $(LIBS)
+
+test-fdopen$(EXEEXT): $(test_fdopen_OBJECTS) $(test_fdopen_DEPENDENCIES) $(EXTRA_test_fdopen_DEPENDENCIES) 
+	@rm -f test-fdopen$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fdopen_OBJECTS) $(test_fdopen_LDADD) $(LIBS)
+
+test-fdopendir$(EXEEXT): $(test_fdopendir_OBJECTS) $(test_fdopendir_DEPENDENCIES) $(EXTRA_test_fdopendir_DEPENDENCIES) 
+	@rm -f test-fdopendir$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fdopendir_OBJECTS) $(test_fdopendir_LDADD) $(LIBS)
+
+test-fgetc$(EXEEXT): $(test_fgetc_OBJECTS) $(test_fgetc_DEPENDENCIES) $(EXTRA_test_fgetc_DEPENDENCIES) 
+	@rm -f test-fgetc$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fgetc_OBJECTS) $(test_fgetc_LDADD) $(LIBS)
+
+test-float$(EXEEXT): $(test_float_OBJECTS) $(test_float_DEPENDENCIES) $(EXTRA_test_float_DEPENDENCIES) 
+	@rm -f test-float$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_float_OBJECTS) $(test_float_LDADD) $(LIBS)
+
+test-fnmatch$(EXEEXT): $(test_fnmatch_OBJECTS) $(test_fnmatch_DEPENDENCIES) $(EXTRA_test_fnmatch_DEPENDENCIES) 
+	@rm -f test-fnmatch$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fnmatch_OBJECTS) $(test_fnmatch_LDADD) $(LIBS)
+
+test-fnmatch-h$(EXEEXT): $(test_fnmatch_h_OBJECTS) $(test_fnmatch_h_DEPENDENCIES) $(EXTRA_test_fnmatch_h_DEPENDENCIES) 
+	@rm -f test-fnmatch-h$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fnmatch_h_OBJECTS) $(test_fnmatch_h_LDADD) $(LIBS)
+
+test-fopen$(EXEEXT): $(test_fopen_OBJECTS) $(test_fopen_DEPENDENCIES) $(EXTRA_test_fopen_DEPENDENCIES) 
+	@rm -f test-fopen$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fopen_OBJECTS) $(test_fopen_LDADD) $(LIBS)
+
+test-fopen-gnu$(EXEEXT): $(test_fopen_gnu_OBJECTS) $(test_fopen_gnu_DEPENDENCIES) $(EXTRA_test_fopen_gnu_DEPENDENCIES) 
+	@rm -f test-fopen-gnu$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fopen_gnu_OBJECTS) $(test_fopen_gnu_LDADD) $(LIBS)
+
+test-fpending$(EXEEXT): $(test_fpending_OBJECTS) $(test_fpending_DEPENDENCIES) $(EXTRA_test_fpending_DEPENDENCIES) 
+	@rm -f test-fpending$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fpending_OBJECTS) $(test_fpending_LDADD) $(LIBS)
+
+test-fputc$(EXEEXT): $(test_fputc_OBJECTS) $(test_fputc_DEPENDENCIES) $(EXTRA_test_fputc_DEPENDENCIES) 
+	@rm -f test-fputc$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fputc_OBJECTS) $(test_fputc_LDADD) $(LIBS)
+
+test-fread$(EXEEXT): $(test_fread_OBJECTS) $(test_fread_DEPENDENCIES) $(EXTRA_test_fread_DEPENDENCIES) 
+	@rm -f test-fread$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fread_OBJECTS) $(test_fread_LDADD) $(LIBS)
+
+test-free$(EXEEXT): $(test_free_OBJECTS) $(test_free_DEPENDENCIES) $(EXTRA_test_free_DEPENDENCIES) 
+	@rm -f test-free$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_free_OBJECTS) $(test_free_LDADD) $(LIBS)
+
+test-fstat$(EXEEXT): $(test_fstat_OBJECTS) $(test_fstat_DEPENDENCIES) $(EXTRA_test_fstat_DEPENDENCIES) 
+	@rm -f test-fstat$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fstat_OBJECTS) $(test_fstat_LDADD) $(LIBS)
+
+test-fstatat$(EXEEXT): $(test_fstatat_OBJECTS) $(test_fstatat_DEPENDENCIES) $(EXTRA_test_fstatat_DEPENDENCIES) 
+	@rm -f test-fstatat$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fstatat_OBJECTS) $(test_fstatat_LDADD) $(LIBS)
+
+test-ftruncate$(EXEEXT): $(test_ftruncate_OBJECTS) $(test_ftruncate_DEPENDENCIES) $(EXTRA_test_ftruncate_DEPENDENCIES) 
+	@rm -f test-ftruncate$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_ftruncate_OBJECTS) $(test_ftruncate_LDADD) $(LIBS)
+
+test-fwrite$(EXEEXT): $(test_fwrite_OBJECTS) $(test_fwrite_DEPENDENCIES) $(EXTRA_test_fwrite_DEPENDENCIES) 
+	@rm -f test-fwrite$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fwrite_OBJECTS) $(test_fwrite_LDADD) $(LIBS)
+
+test-getcwd-lgpl$(EXEEXT): $(test_getcwd_lgpl_OBJECTS) $(test_getcwd_lgpl_DEPENDENCIES) $(EXTRA_test_getcwd_lgpl_DEPENDENCIES) 
+	@rm -f test-getcwd-lgpl$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_getcwd_lgpl_OBJECTS) $(test_getcwd_lgpl_LDADD) $(LIBS)
+
+test-getdtablesize$(EXEEXT): $(test_getdtablesize_OBJECTS) $(test_getdtablesize_DEPENDENCIES) $(EXTRA_test_getdtablesize_DEPENDENCIES) 
+	@rm -f test-getdtablesize$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_getdtablesize_OBJECTS) $(test_getdtablesize_LDADD) $(LIBS)
+
+test-getopt-gnu$(EXEEXT): $(test_getopt_gnu_OBJECTS) $(test_getopt_gnu_DEPENDENCIES) $(EXTRA_test_getopt_gnu_DEPENDENCIES) 
+	@rm -f test-getopt-gnu$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_getopt_gnu_OBJECTS) $(test_getopt_gnu_LDADD) $(LIBS)
+
+test-getopt-posix$(EXEEXT): $(test_getopt_posix_OBJECTS) $(test_getopt_posix_DEPENDENCIES) $(EXTRA_test_getopt_posix_DEPENDENCIES) 
+	@rm -f test-getopt-posix$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_getopt_posix_OBJECTS) $(test_getopt_posix_LDADD) $(LIBS)
+
+test-getprogname$(EXEEXT): $(test_getprogname_OBJECTS) $(test_getprogname_DEPENDENCIES) $(EXTRA_test_getprogname_DEPENDENCIES) 
+	@rm -f test-getprogname$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_getprogname_OBJECTS) $(test_getprogname_LDADD) $(LIBS)
+
+test-gettimeofday$(EXEEXT): $(test_gettimeofday_OBJECTS) $(test_gettimeofday_DEPENDENCIES) $(EXTRA_test_gettimeofday_DEPENDENCIES) 
+	@rm -f test-gettimeofday$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_gettimeofday_OBJECTS) $(test_gettimeofday_LDADD) $(LIBS)
+
+test-hard-locale$(EXEEXT): $(test_hard_locale_OBJECTS) $(test_hard_locale_DEPENDENCIES) $(EXTRA_test_hard_locale_DEPENDENCIES) 
+	@rm -f test-hard-locale$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_hard_locale_OBJECTS) $(test_hard_locale_LDADD) $(LIBS)
+
+test-hash$(EXEEXT): $(test_hash_OBJECTS) $(test_hash_DEPENDENCIES) $(EXTRA_test_hash_DEPENDENCIES) 
+	@rm -f test-hash$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_hash_OBJECTS) $(test_hash_LDADD) $(LIBS)
+
+test-i-ring$(EXEEXT): $(test_i_ring_OBJECTS) $(test_i_ring_DEPENDENCIES) $(EXTRA_test_i_ring_DEPENDENCIES) 
+	@rm -f test-i-ring$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_i_ring_OBJECTS) $(test_i_ring_LDADD) $(LIBS)
+
+test-iconv$(EXEEXT): $(test_iconv_OBJECTS) $(test_iconv_DEPENDENCIES) $(EXTRA_test_iconv_DEPENDENCIES) 
+	@rm -f test-iconv$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_iconv_OBJECTS) $(test_iconv_LDADD) $(LIBS)
+
+test-iconv-h$(EXEEXT): $(test_iconv_h_OBJECTS) $(test_iconv_h_DEPENDENCIES) $(EXTRA_test_iconv_h_DEPENDENCIES) 
+	@rm -f test-iconv-h$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_iconv_h_OBJECTS) $(test_iconv_h_LDADD) $(LIBS)
+
+test-ignore-value$(EXEEXT): $(test_ignore_value_OBJECTS) $(test_ignore_value_DEPENDENCIES) $(EXTRA_test_ignore_value_DEPENDENCIES) 
+	@rm -f test-ignore-value$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_ignore_value_OBJECTS) $(test_ignore_value_LDADD) $(LIBS)
+
+test-inet_pton$(EXEEXT): $(test_inet_pton_OBJECTS) $(test_inet_pton_DEPENDENCIES) $(EXTRA_test_inet_pton_DEPENDENCIES) 
+	@rm -f test-inet_pton$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_inet_pton_OBJECTS) $(test_inet_pton_LDADD) $(LIBS)
+
+test-intprops$(EXEEXT): $(test_intprops_OBJECTS) $(test_intprops_DEPENDENCIES) $(EXTRA_test_intprops_DEPENDENCIES) 
+	@rm -f test-intprops$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_intprops_OBJECTS) $(test_intprops_LDADD) $(LIBS)
+
+test-inttostr$(EXEEXT): $(test_inttostr_OBJECTS) $(test_inttostr_DEPENDENCIES) $(EXTRA_test_inttostr_DEPENDENCIES) 
+	@rm -f test-inttostr$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_inttostr_OBJECTS) $(test_inttostr_LDADD) $(LIBS)
+
+test-inttypes$(EXEEXT): $(test_inttypes_OBJECTS) $(test_inttypes_DEPENDENCIES) $(EXTRA_test_inttypes_DEPENDENCIES) 
+	@rm -f test-inttypes$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_inttypes_OBJECTS) $(test_inttypes_LDADD) $(LIBS)
+
+test-ioctl$(EXEEXT): $(test_ioctl_OBJECTS) $(test_ioctl_DEPENDENCIES) $(EXTRA_test_ioctl_DEPENDENCIES) 
+	@rm -f test-ioctl$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_ioctl_OBJECTS) $(test_ioctl_LDADD) $(LIBS)
+
+test-isatty$(EXEEXT): $(test_isatty_OBJECTS) $(test_isatty_DEPENDENCIES) $(EXTRA_test_isatty_DEPENDENCIES) 
+	@rm -f test-isatty$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_isatty_OBJECTS) $(test_isatty_LDADD) $(LIBS)
+
+test-isblank$(EXEEXT): $(test_isblank_OBJECTS) $(test_isblank_DEPENDENCIES) $(EXTRA_test_isblank_DEPENDENCIES) 
+	@rm -f test-isblank$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_isblank_OBJECTS) $(test_isblank_LDADD) $(LIBS)
+
+test-iswblank$(EXEEXT): $(test_iswblank_OBJECTS) $(test_iswblank_DEPENDENCIES) $(EXTRA_test_iswblank_DEPENDENCIES) 
+	@rm -f test-iswblank$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_iswblank_OBJECTS) $(test_iswblank_LDADD) $(LIBS)
+
+test-iswdigit$(EXEEXT): $(test_iswdigit_OBJECTS) $(test_iswdigit_DEPENDENCIES) $(EXTRA_test_iswdigit_DEPENDENCIES) 
+	@rm -f test-iswdigit$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_iswdigit_OBJECTS) $(test_iswdigit_LDADD) $(LIBS)
+
+test-iswxdigit$(EXEEXT): $(test_iswxdigit_OBJECTS) $(test_iswxdigit_DEPENDENCIES) $(EXTRA_test_iswxdigit_DEPENDENCIES) 
+	@rm -f test-iswxdigit$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_iswxdigit_OBJECTS) $(test_iswxdigit_LDADD) $(LIBS)
+
+test-langinfo$(EXEEXT): $(test_langinfo_OBJECTS) $(test_langinfo_DEPENDENCIES) $(EXTRA_test_langinfo_DEPENDENCIES) 
+	@rm -f test-langinfo$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_langinfo_OBJECTS) $(test_langinfo_LDADD) $(LIBS)
+
+test-limits-h$(EXEEXT): $(test_limits_h_OBJECTS) $(test_limits_h_DEPENDENCIES) $(EXTRA_test_limits_h_DEPENDENCIES) 
+	@rm -f test-limits-h$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_limits_h_OBJECTS) $(test_limits_h_LDADD) $(LIBS)
+
+test-listen$(EXEEXT): $(test_listen_OBJECTS) $(test_listen_DEPENDENCIES) $(EXTRA_test_listen_DEPENDENCIES) 
+	@rm -f test-listen$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_listen_OBJECTS) $(test_listen_LDADD) $(LIBS)
+
+test-localcharset$(EXEEXT): $(test_localcharset_OBJECTS) $(test_localcharset_DEPENDENCIES) $(EXTRA_test_localcharset_DEPENDENCIES) 
+	@rm -f test-localcharset$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_localcharset_OBJECTS) $(test_localcharset_LDADD) $(LIBS)
+
+test-locale$(EXEEXT): $(test_locale_OBJECTS) $(test_locale_DEPENDENCIES) $(EXTRA_test_locale_DEPENDENCIES) 
+	@rm -f test-locale$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_locale_OBJECTS) $(test_locale_LDADD) $(LIBS)
+
+test-localeconv$(EXEEXT): $(test_localeconv_OBJECTS) $(test_localeconv_DEPENDENCIES) $(EXTRA_test_localeconv_DEPENDENCIES) 
+	@rm -f test-localeconv$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_localeconv_OBJECTS) $(test_localeconv_LDADD) $(LIBS)
+
+test-localename$(EXEEXT): $(test_localename_OBJECTS) $(test_localename_DEPENDENCIES) $(EXTRA_test_localename_DEPENDENCIES) 
+	@rm -f test-localename$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_localename_OBJECTS) $(test_localename_LDADD) $(LIBS)
+
+test-lseek$(EXEEXT): $(test_lseek_OBJECTS) $(test_lseek_DEPENDENCIES) $(EXTRA_test_lseek_DEPENDENCIES) 
+	@rm -f test-lseek$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_lseek_OBJECTS) $(test_lseek_LDADD) $(LIBS)
+
+test-lstat$(EXEEXT): $(test_lstat_OBJECTS) $(test_lstat_DEPENDENCIES) $(EXTRA_test_lstat_DEPENDENCIES) 
+	@rm -f test-lstat$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_lstat_OBJECTS) $(test_lstat_LDADD) $(LIBS)
+
+test-malloc-gnu$(EXEEXT): $(test_malloc_gnu_OBJECTS) $(test_malloc_gnu_DEPENDENCIES) $(EXTRA_test_malloc_gnu_DEPENDENCIES) 
+	@rm -f test-malloc-gnu$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_malloc_gnu_OBJECTS) $(test_malloc_gnu_LDADD) $(LIBS)
+
+test-malloca$(EXEEXT): $(test_malloca_OBJECTS) $(test_malloca_DEPENDENCIES) $(EXTRA_test_malloca_DEPENDENCIES) 
+	@rm -f test-malloca$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_malloca_OBJECTS) $(test_malloca_LDADD) $(LIBS)
+
+test-mbscasecmp$(EXEEXT): $(test_mbscasecmp_OBJECTS) $(test_mbscasecmp_DEPENDENCIES) $(EXTRA_test_mbscasecmp_DEPENDENCIES) 
+	@rm -f test-mbscasecmp$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_mbscasecmp_OBJECTS) $(test_mbscasecmp_LDADD) $(LIBS)
+
+test-mbsinit$(EXEEXT): $(test_mbsinit_OBJECTS) $(test_mbsinit_DEPENDENCIES) $(EXTRA_test_mbsinit_DEPENDENCIES) 
+	@rm -f test-mbsinit$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_mbsinit_OBJECTS) $(test_mbsinit_LDADD) $(LIBS)
+
+test-mbsrtowcs$(EXEEXT): $(test_mbsrtowcs_OBJECTS) $(test_mbsrtowcs_DEPENDENCIES) $(EXTRA_test_mbsrtowcs_DEPENDENCIES) 
+	@rm -f test-mbsrtowcs$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_mbsrtowcs_OBJECTS) $(test_mbsrtowcs_LDADD) $(LIBS)
+
+test-mbsstr1$(EXEEXT): $(test_mbsstr1_OBJECTS) $(test_mbsstr1_DEPENDENCIES) $(EXTRA_test_mbsstr1_DEPENDENCIES) 
+	@rm -f test-mbsstr1$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_mbsstr1_OBJECTS) $(test_mbsstr1_LDADD) $(LIBS)
+
+test-mbsstr2$(EXEEXT): $(test_mbsstr2_OBJECTS) $(test_mbsstr2_DEPENDENCIES) $(EXTRA_test_mbsstr2_DEPENDENCIES) 
+	@rm -f test-mbsstr2$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_mbsstr2_OBJECTS) $(test_mbsstr2_LDADD) $(LIBS)
+
+test-mbsstr3$(EXEEXT): $(test_mbsstr3_OBJECTS) $(test_mbsstr3_DEPENDENCIES) $(EXTRA_test_mbsstr3_DEPENDENCIES) 
+	@rm -f test-mbsstr3$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_mbsstr3_OBJECTS) $(test_mbsstr3_LDADD) $(LIBS)
+
+test-memchr$(EXEEXT): $(test_memchr_OBJECTS) $(test_memchr_DEPENDENCIES) $(EXTRA_test_memchr_DEPENDENCIES) 
+	@rm -f test-memchr$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_memchr_OBJECTS) $(test_memchr_LDADD) $(LIBS)
+
+test-memchr2$(EXEEXT): $(test_memchr2_OBJECTS) $(test_memchr2_DEPENDENCIES) $(EXTRA_test_memchr2_DEPENDENCIES) 
+	@rm -f test-memchr2$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_memchr2_OBJECTS) $(test_memchr2_LDADD) $(LIBS)
+
+test-memrchr$(EXEEXT): $(test_memrchr_OBJECTS) $(test_memrchr_DEPENDENCIES) $(EXTRA_test_memrchr_DEPENDENCIES) 
+	@rm -f test-memrchr$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_memrchr_OBJECTS) $(test_memrchr_LDADD) $(LIBS)
+
+test-nanosleep$(EXEEXT): $(test_nanosleep_OBJECTS) $(test_nanosleep_DEPENDENCIES) $(EXTRA_test_nanosleep_DEPENDENCIES) 
+	@rm -f test-nanosleep$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_nanosleep_OBJECTS) $(test_nanosleep_LDADD) $(LIBS)
+
+test-netinet_in$(EXEEXT): $(test_netinet_in_OBJECTS) $(test_netinet_in_DEPENDENCIES) $(EXTRA_test_netinet_in_DEPENDENCIES) 
+	@rm -f test-netinet_in$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_netinet_in_OBJECTS) $(test_netinet_in_LDADD) $(LIBS)
+
+test-nl_langinfo$(EXEEXT): $(test_nl_langinfo_OBJECTS) $(test_nl_langinfo_DEPENDENCIES) $(EXTRA_test_nl_langinfo_DEPENDENCIES) 
+	@rm -f test-nl_langinfo$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_nl_langinfo_OBJECTS) $(test_nl_langinfo_LDADD) $(LIBS)
+
+test-nl_langinfo-mt$(EXEEXT): $(test_nl_langinfo_mt_OBJECTS) $(test_nl_langinfo_mt_DEPENDENCIES) $(EXTRA_test_nl_langinfo_mt_DEPENDENCIES) 
+	@rm -f test-nl_langinfo-mt$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_nl_langinfo_mt_OBJECTS) $(test_nl_langinfo_mt_LDADD) $(LIBS)
+
+test-open$(EXEEXT): $(test_open_OBJECTS) $(test_open_DEPENDENCIES) $(EXTRA_test_open_DEPENDENCIES) 
+	@rm -f test-open$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_open_OBJECTS) $(test_open_LDADD) $(LIBS)
+
+test-openat$(EXEEXT): $(test_openat_OBJECTS) $(test_openat_DEPENDENCIES) $(EXTRA_test_openat_DEPENDENCIES) 
+	@rm -f test-openat$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_openat_OBJECTS) $(test_openat_LDADD) $(LIBS)
+
+test-openat-safer$(EXEEXT): $(test_openat_safer_OBJECTS) $(test_openat_safer_DEPENDENCIES) $(EXTRA_test_openat_safer_DEPENDENCIES) 
+	@rm -f test-openat-safer$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_openat_safer_OBJECTS) $(test_openat_safer_LDADD) $(LIBS)
+
+test-pathmax$(EXEEXT): $(test_pathmax_OBJECTS) $(test_pathmax_DEPENDENCIES) $(EXTRA_test_pathmax_DEPENDENCIES) 
+	@rm -f test-pathmax$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_pathmax_OBJECTS) $(test_pathmax_LDADD) $(LIBS)
+
+test-perror$(EXEEXT): $(test_perror_OBJECTS) $(test_perror_DEPENDENCIES) $(EXTRA_test_perror_DEPENDENCIES) 
+	@rm -f test-perror$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_perror_OBJECTS) $(test_perror_LDADD) $(LIBS)
+
+test-perror2$(EXEEXT): $(test_perror2_OBJECTS) $(test_perror2_DEPENDENCIES) $(EXTRA_test_perror2_DEPENDENCIES) 
+	@rm -f test-perror2$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_perror2_OBJECTS) $(test_perror2_LDADD) $(LIBS)
+
+test-pipe$(EXEEXT): $(test_pipe_OBJECTS) $(test_pipe_DEPENDENCIES) $(EXTRA_test_pipe_DEPENDENCIES) 
+	@rm -f test-pipe$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_pipe_OBJECTS) $(test_pipe_LDADD) $(LIBS)
+
+test-pthread$(EXEEXT): $(test_pthread_OBJECTS) $(test_pthread_DEPENDENCIES) $(EXTRA_test_pthread_DEPENDENCIES) 
+	@rm -f test-pthread$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_pthread_OBJECTS) $(test_pthread_LDADD) $(LIBS)
+
+test-pthread-thread$(EXEEXT): $(test_pthread_thread_OBJECTS) $(test_pthread_thread_DEPENDENCIES) $(EXTRA_test_pthread_thread_DEPENDENCIES) 
+	@rm -f test-pthread-thread$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_pthread_thread_OBJECTS) $(test_pthread_thread_LDADD) $(LIBS)
+
+test-pthread_sigmask1$(EXEEXT): $(test_pthread_sigmask1_OBJECTS) $(test_pthread_sigmask1_DEPENDENCIES) $(EXTRA_test_pthread_sigmask1_DEPENDENCIES) 
+	@rm -f test-pthread_sigmask1$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_pthread_sigmask1_OBJECTS) $(test_pthread_sigmask1_LDADD) $(LIBS)
+
+test-pthread_sigmask2$(EXEEXT): $(test_pthread_sigmask2_OBJECTS) $(test_pthread_sigmask2_DEPENDENCIES) $(EXTRA_test_pthread_sigmask2_DEPENDENCIES) 
+	@rm -f test-pthread_sigmask2$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_pthread_sigmask2_OBJECTS) $(test_pthread_sigmask2_LDADD) $(LIBS)
+
+test-quotearg-simple$(EXEEXT): $(test_quotearg_simple_OBJECTS) $(test_quotearg_simple_DEPENDENCIES) $(EXTRA_test_quotearg_simple_DEPENDENCIES) 
+	@rm -f test-quotearg-simple$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_quotearg_simple_OBJECTS) $(test_quotearg_simple_LDADD) $(LIBS)
+
+test-raise$(EXEEXT): $(test_raise_OBJECTS) $(test_raise_DEPENDENCIES) $(EXTRA_test_raise_DEPENDENCIES) 
+	@rm -f test-raise$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_raise_OBJECTS) $(test_raise_LDADD) $(LIBS)
+
+test-rawmemchr$(EXEEXT): $(test_rawmemchr_OBJECTS) $(test_rawmemchr_DEPENDENCIES) $(EXTRA_test_rawmemchr_DEPENDENCIES) 
+	@rm -f test-rawmemchr$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_rawmemchr_OBJECTS) $(test_rawmemchr_LDADD) $(LIBS)
+
+test-read$(EXEEXT): $(test_read_OBJECTS) $(test_read_DEPENDENCIES) $(EXTRA_test_read_DEPENDENCIES) 
+	@rm -f test-read$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_read_OBJECTS) $(test_read_LDADD) $(LIBS)
+
+test-realloc-gnu$(EXEEXT): $(test_realloc_gnu_OBJECTS) $(test_realloc_gnu_DEPENDENCIES) $(EXTRA_test_realloc_gnu_DEPENDENCIES) 
+	@rm -f test-realloc-gnu$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_realloc_gnu_OBJECTS) $(test_realloc_gnu_LDADD) $(LIBS)
+
+test-reallocarray$(EXEEXT): $(test_reallocarray_OBJECTS) $(test_reallocarray_DEPENDENCIES) $(EXTRA_test_reallocarray_DEPENDENCIES) 
+	@rm -f test-reallocarray$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_reallocarray_OBJECTS) $(test_reallocarray_LDADD) $(LIBS)
+
+test-regex$(EXEEXT): $(test_regex_OBJECTS) $(test_regex_DEPENDENCIES) $(EXTRA_test_regex_DEPENDENCIES) 
+	@rm -f test-regex$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_regex_OBJECTS) $(test_regex_LDADD) $(LIBS)
+
+test-sched$(EXEEXT): $(test_sched_OBJECTS) $(test_sched_DEPENDENCIES) $(EXTRA_test_sched_DEPENDENCIES) 
+	@rm -f test-sched$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_sched_OBJECTS) $(test_sched_LDADD) $(LIBS)
+
+test-select$(EXEEXT): $(test_select_OBJECTS) $(test_select_DEPENDENCIES) $(EXTRA_test_select_DEPENDENCIES) 
+	@rm -f test-select$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_select_OBJECTS) $(test_select_LDADD) $(LIBS)
+
+test-select-fd$(EXEEXT): $(test_select_fd_OBJECTS) $(test_select_fd_DEPENDENCIES) $(EXTRA_test_select_fd_DEPENDENCIES) 
+	@rm -f test-select-fd$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_select_fd_OBJECTS) $(test_select_fd_LDADD) $(LIBS)
+
+test-select-stdin$(EXEEXT): $(test_select_stdin_OBJECTS) $(test_select_stdin_DEPENDENCIES) $(EXTRA_test_select_stdin_DEPENDENCIES) 
+	@rm -f test-select-stdin$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_select_stdin_OBJECTS) $(test_select_stdin_LDADD) $(LIBS)
+
+test-setenv$(EXEEXT): $(test_setenv_OBJECTS) $(test_setenv_DEPENDENCIES) $(EXTRA_test_setenv_DEPENDENCIES) 
+	@rm -f test-setenv$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_setenv_OBJECTS) $(test_setenv_LDADD) $(LIBS)
+
+test-setlocale1$(EXEEXT): $(test_setlocale1_OBJECTS) $(test_setlocale1_DEPENDENCIES) $(EXTRA_test_setlocale1_DEPENDENCIES) 
+	@rm -f test-setlocale1$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_setlocale1_OBJECTS) $(test_setlocale1_LDADD) $(LIBS)
+
+test-setlocale2$(EXEEXT): $(test_setlocale2_OBJECTS) $(test_setlocale2_DEPENDENCIES) $(EXTRA_test_setlocale2_DEPENDENCIES) 
+	@rm -f test-setlocale2$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_setlocale2_OBJECTS) $(test_setlocale2_LDADD) $(LIBS)
+
+test-setlocale_null$(EXEEXT): $(test_setlocale_null_OBJECTS) $(test_setlocale_null_DEPENDENCIES) $(EXTRA_test_setlocale_null_DEPENDENCIES) 
+	@rm -f test-setlocale_null$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_setlocale_null_OBJECTS) $(test_setlocale_null_LDADD) $(LIBS)
+
+test-setlocale_null-mt-all$(EXEEXT): $(test_setlocale_null_mt_all_OBJECTS) $(test_setlocale_null_mt_all_DEPENDENCIES) $(EXTRA_test_setlocale_null_mt_all_DEPENDENCIES) 
+	@rm -f test-setlocale_null-mt-all$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_setlocale_null_mt_all_OBJECTS) $(test_setlocale_null_mt_all_LDADD) $(LIBS)
+
+test-setlocale_null-mt-one$(EXEEXT): $(test_setlocale_null_mt_one_OBJECTS) $(test_setlocale_null_mt_one_DEPENDENCIES) $(EXTRA_test_setlocale_null_mt_one_DEPENDENCIES) 
+	@rm -f test-setlocale_null-mt-one$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_setlocale_null_mt_one_OBJECTS) $(test_setlocale_null_mt_one_LDADD) $(LIBS)
+
+test-setsockopt$(EXEEXT): $(test_setsockopt_OBJECTS) $(test_setsockopt_DEPENDENCIES) $(EXTRA_test_setsockopt_DEPENDENCIES) 
+	@rm -f test-setsockopt$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_setsockopt_OBJECTS) $(test_setsockopt_LDADD) $(LIBS)
+
+test-sigaction$(EXEEXT): $(test_sigaction_OBJECTS) $(test_sigaction_DEPENDENCIES) $(EXTRA_test_sigaction_DEPENDENCIES) 
+	@rm -f test-sigaction$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_sigaction_OBJECTS) $(test_sigaction_LDADD) $(LIBS)
+
+test-signal-h$(EXEEXT): $(test_signal_h_OBJECTS) $(test_signal_h_DEPENDENCIES) $(EXTRA_test_signal_h_DEPENDENCIES) 
+	@rm -f test-signal-h$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_signal_h_OBJECTS) $(test_signal_h_LDADD) $(LIBS)
+
+test-sigprocmask$(EXEEXT): $(test_sigprocmask_OBJECTS) $(test_sigprocmask_DEPENDENCIES) $(EXTRA_test_sigprocmask_DEPENDENCIES) 
+	@rm -f test-sigprocmask$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_sigprocmask_OBJECTS) $(test_sigprocmask_LDADD) $(LIBS)
+
+test-sigsegv-catch-segv1$(EXEEXT): $(test_sigsegv_catch_segv1_OBJECTS) $(test_sigsegv_catch_segv1_DEPENDENCIES) $(EXTRA_test_sigsegv_catch_segv1_DEPENDENCIES) 
+	@rm -f test-sigsegv-catch-segv1$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_sigsegv_catch_segv1_OBJECTS) $(test_sigsegv_catch_segv1_LDADD) $(LIBS)
+
+test-sigsegv-catch-segv2$(EXEEXT): $(test_sigsegv_catch_segv2_OBJECTS) $(test_sigsegv_catch_segv2_DEPENDENCIES) $(EXTRA_test_sigsegv_catch_segv2_DEPENDENCIES) 
+	@rm -f test-sigsegv-catch-segv2$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_sigsegv_catch_segv2_OBJECTS) $(test_sigsegv_catch_segv2_LDADD) $(LIBS)
+
+test-sigsegv-catch-stackoverflow1$(EXEEXT): $(test_sigsegv_catch_stackoverflow1_OBJECTS) $(test_sigsegv_catch_stackoverflow1_DEPENDENCIES) $(EXTRA_test_sigsegv_catch_stackoverflow1_DEPENDENCIES) 
+	@rm -f test-sigsegv-catch-stackoverflow1$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_sigsegv_catch_stackoverflow1_OBJECTS) $(test_sigsegv_catch_stackoverflow1_LDADD) $(LIBS)
+
+test-sigsegv-catch-stackoverflow2$(EXEEXT): $(test_sigsegv_catch_stackoverflow2_OBJECTS) $(test_sigsegv_catch_stackoverflow2_DEPENDENCIES) $(EXTRA_test_sigsegv_catch_stackoverflow2_DEPENDENCIES) 
+	@rm -f test-sigsegv-catch-stackoverflow2$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_sigsegv_catch_stackoverflow2_OBJECTS) $(test_sigsegv_catch_stackoverflow2_LDADD) $(LIBS)
+
+test-sleep$(EXEEXT): $(test_sleep_OBJECTS) $(test_sleep_DEPENDENCIES) $(EXTRA_test_sleep_DEPENDENCIES) 
+	@rm -f test-sleep$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_sleep_OBJECTS) $(test_sleep_LDADD) $(LIBS)
+
+test-snprintf$(EXEEXT): $(test_snprintf_OBJECTS) $(test_snprintf_DEPENDENCIES) $(EXTRA_test_snprintf_DEPENDENCIES) 
+	@rm -f test-snprintf$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_snprintf_OBJECTS) $(test_snprintf_LDADD) $(LIBS)
+
+test-sockets$(EXEEXT): $(test_sockets_OBJECTS) $(test_sockets_DEPENDENCIES) $(EXTRA_test_sockets_DEPENDENCIES) 
+	@rm -f test-sockets$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_sockets_OBJECTS) $(test_sockets_LDADD) $(LIBS)
+
+test-stat$(EXEEXT): $(test_stat_OBJECTS) $(test_stat_DEPENDENCIES) $(EXTRA_test_stat_DEPENDENCIES) 
+	@rm -f test-stat$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_stat_OBJECTS) $(test_stat_LDADD) $(LIBS)
+
+test-stat-time$(EXEEXT): $(test_stat_time_OBJECTS) $(test_stat_time_DEPENDENCIES) $(EXTRA_test_stat_time_DEPENDENCIES) 
+	@rm -f test-stat-time$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_stat_time_OBJECTS) $(test_stat_time_LDADD) $(LIBS)
+
+test-stdalign$(EXEEXT): $(test_stdalign_OBJECTS) $(test_stdalign_DEPENDENCIES) $(EXTRA_test_stdalign_DEPENDENCIES) 
+	@rm -f test-stdalign$(EXEEXT)
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+	  fi; \
+	  ($(am__cd) $$subdir && $(MAKE) $(AM_MAKEFLAGS) $$local_target) \
+	  || eval $$failcom; \
+	done; \
+	if test "$$dot_seen" = "no"; then \
+	  $(MAKE) $(AM_MAKEFLAGS) "$$target-am" || exit 1; \
+	fi; test -z "$$fail"
+
+ID: $(am__tagged_files)
+	$(am__define_uniq_tagged_files); mkid -fID $$unique
+tags: tags-recursive
+TAGS: tags
+
+tags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	set x; \
+	here=`pwd`; \
+	if ($(ETAGS) --etags-include --version) >/dev/null 2>&1; then \
+	  include_option=--etags-include; \
+	  empty_fix=.; \
+	else \
+	  include_option=--include; \
+	  empty_fix=; \
+	fi; \
+	list='$(SUBDIRS)'; for subdir in $$list; do \
+	  if test "$$subdir" = .; then :; else \
+	    test ! -f $$subdir/TAGS || \
+	      set "$$@" "$$include_option=$$here/$$subdir/TAGS"; \
+	  fi; \
+	done; \
+	$(am__define_uniq_tagged_files); \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: ctags-recursive
+
+CTAGS: ctags
+ctags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	$(am__define_uniq_tagged_files); \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+cscopelist: cscopelist-recursive
+
+cscopelist-am: $(am__tagged_files)
+	list='$(am__tagged_files)'; \
+	case "$(srcdir)" in \
+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+# Recover from deleted '.trs' file; this should ensure that
+# "rm -f foo.log; make foo.trs" re-run 'foo.test', and re-create
+# both 'foo.log' and 'foo.trs'.  Break the recipe in two subshells
+# to avoid problems with "make -n".
+.log.trs:
+	rm -f $< $@
+	$(MAKE) $(AM_MAKEFLAGS) $<
+
+# Leading 'am--fnord' is there to ensure the list of targets does not
+# expand to empty, as could happen e.g. with make check TESTS=''.
+am--fnord $(TEST_LOGS) $(TEST_LOGS:.log=.trs): $(am__force_recheck)
+am--force-recheck:
+	@:
+
+$(TEST_SUITE_LOG): $(TEST_LOGS)
+	@$(am__set_TESTS_bases); \
+	am__f_ok () { test -f "$$1" && test -r "$$1"; }; \
+	redo_bases=`for i in $$bases; do \
+	              am__f_ok $$i.trs && am__f_ok $$i.log || echo $$i; \
+	            done`; \
+	if test -n "$$redo_bases"; then \
+	  redo_logs=`for i in $$redo_bases; do echo $$i.log; done`; \
+	  redo_results=`for i in $$redo_bases; do echo $$i.trs; done`; \
+	  if $(am__make_dryrun); then :; else \
+	    rm -f $$redo_logs && rm -f $$redo_results || exit 1; \
+	  fi; \
+	fi; \
+	if test -n "$$am__remaking_logs"; then \
+	  echo "fatal: making $(TEST_SUITE_LOG): possible infinite" \
+	       "recursion detected" >&2; \
+	elif test -n "$$redo_logs"; then \
+	  am__remaking_logs=yes $(MAKE) $(AM_MAKEFLAGS) $$redo_logs; \
+	fi; \
+	if $(am__make_dryrun); then :; else \
+	  st=0;  \
+	  errmsg="fatal: making $(TEST_SUITE_LOG): failed to create"; \
+	  for i in $$redo_bases; do \
+	    test -f $$i.trs && test -r $$i.trs \
+	      || { echo "$$errmsg $$i.trs" >&2; st=1; }; \
+	    test -f $$i.log && test -r $$i.log \
+	      || { echo "$$errmsg $$i.log" >&2; st=1; }; \
+	  done; \
+	  test $$st -eq 0 || exit 1; \
+	fi
+	@$(am__sh_e_setup); $(am__tty_colors); $(am__set_TESTS_bases); \
+	ws='[ 	]'; \
+	results=`for b in $$bases; do echo $$b.trs; done`; \
+	test -n "$$results" || results=/dev/null; \
+	all=`  grep "^$$ws*:test-result:"           $$results | wc -l`; \
+	pass=` grep "^$$ws*:test-result:$$ws*PASS"  $$results | wc -l`; \
+	fail=` grep "^$$ws*:test-result:$$ws*FAIL"  $$results | wc -l`; \
+	skip=` grep "^$$ws*:test-result:$$ws*SKIP"  $$results | wc -l`; \
+	xfail=`grep "^$$ws*:test-result:$$ws*XFAIL" $$results | wc -l`; \
+	xpass=`grep "^$$ws*:test-result:$$ws*XPASS" $$results | wc -l`; \
+	error=`grep "^$$ws*:test-result:$$ws*ERROR" $$results | wc -l`; \
+	if test `expr $$fail + $$xpass + $$error` -eq 0; then \
+	  success=true; \
+	else \
+	  success=false; \
+	fi; \
+	br='==================='; br=$$br$$br$$br$$br; \
+	result_count () \
+	{ \
+	    if test x"$$1" = x"--maybe-color"; then \
+	      maybe_colorize=yes; \
+	    elif test x"$$1" = x"--no-color"; then \
+	      maybe_colorize=no; \
+	    else \
+	      echo "$@: invalid 'result_count' usage" >&2; exit 4; \
+	    fi; \
+	    shift; \
+	    desc=$$1 count=$$2; \
+	    if test $$maybe_colorize = yes && test $$count -gt 0; then \
+	      color_start=$$3 color_end=$$std; \
+	    else \
+	      color_start= color_end=; \
+	    fi; \
+	    echo "$${color_start}# $$desc $$count$${color_end}"; \
+	}; \
+	create_testsuite_report () \
+	{ \
+	  result_count $$1 "TOTAL:" $$all   "$$brg"; \
+	  result_count $$1 "PASS: " $$pass  "$$grn"; \
+	  result_count $$1 "SKIP: " $$skip  "$$blu"; \
+	  result_count $$1 "XFAIL:" $$xfail "$$lgn"; \
+	  result_count $$1 "FAIL: " $$fail  "$$red"; \
+	  result_count $$1 "XPASS:" $$xpass "$$red"; \
+	  result_count $$1 "ERROR:" $$error "$$mgn"; \
+	}; \
+	{								\
+	  echo "$(PACKAGE_STRING): $(subdir)/$(TEST_SUITE_LOG)" |	\
+	    $(am__rst_title);						\
+	  create_testsuite_report --no-color;				\
+	  echo;								\
+	  echo ".. contents:: :depth: 2";				\
+	  echo;								\
+	  for b in $$bases; do echo $$b; done				\
+	    | $(am__create_global_log);					\
+	} >$(TEST_SUITE_LOG).tmp || exit 1;				\
+	mv $(TEST_SUITE_LOG).tmp $(TEST_SUITE_LOG);			\
+	if $$success; then						\
+	  col="$$grn";							\
+	 else								\
+	  col="$$red";							\
+	  test x"$$VERBOSE" = x || cat $(TEST_SUITE_LOG);		\
+	fi;								\
+	echo "$${col}$$br$${std}"; 					\
+	echo "$${col}Testsuite summary"$(AM_TESTSUITE_SUMMARY_HEADER)"$${std}";	\
+	echo "$${col}$$br$${std}"; 					\
+	create_testsuite_report --maybe-color;				\
+	echo "$$col$$br$$std";						\
+	if $$success; then :; else					\
+	  echo "$${col}See $(subdir)/$(TEST_SUITE_LOG)$${std}";		\
+	  if test -n "$(PACKAGE_BUGREPORT)"; then			\
+	    echo "$${col}Please report to $(PACKAGE_BUGREPORT)$${std}";	\
+	  fi;								\
+	  echo "$$col$$br$$std";					\
+	fi;								\
+	$$success || exit 1
+
+check-TESTS: $(check_PROGRAMS) $(check_LIBRARIES)
+	@list='$(RECHECK_LOGS)';           test -z "$$list" || rm -f $$list
+	@list='$(RECHECK_LOGS:.log=.trs)'; test -z "$$list" || rm -f $$list
+	@test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
+	@set +e; $(am__set_TESTS_bases); \
+	log_list=`for i in $$bases; do echo $$i.log; done`; \
+	trs_list=`for i in $$bases; do echo $$i.trs; done`; \
+	log_list=`echo $$log_list`; trs_list=`echo $$trs_list`; \
+	$(MAKE) $(AM_MAKEFLAGS) $(TEST_SUITE_LOG) TEST_LOGS="$$log_list"; \
+	exit $$?;
+recheck: all $(check_PROGRAMS) $(check_LIBRARIES)
+	@test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
+	@set +e; $(am__set_TESTS_bases); \
+	bases=`for i in $$bases; do echo $$i; done \
+	         | $(am__list_recheck_tests)` || exit 1; \
+	log_list=`for i in $$bases; do echo $$i.log; done`; \
+	log_list=`echo $$log_list`; \
+	$(MAKE) $(AM_MAKEFLAGS) $(TEST_SUITE_LOG) \
+	        am__force_recheck=am--force-recheck \
+	        TEST_LOGS="$$log_list"; \
+	exit $$?
+test-accept.log: test-accept$(EXEEXT)
+	@p='test-accept$(EXEEXT)'; \
+	b='test-accept'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-alignof.log: test-alignof$(EXEEXT)
+	@p='test-alignof$(EXEEXT)'; \
+	b='test-alignof'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-alloca-opt.log: test-alloca-opt$(EXEEXT)
+	@p='test-alloca-opt$(EXEEXT)'; \
+	b='test-alloca-opt'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-argmatch.log: test-argmatch$(EXEEXT)
+	@p='test-argmatch$(EXEEXT)'; \
+	b='test-argmatch'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-arpa_inet.log: test-arpa_inet$(EXEEXT)
+	@p='test-arpa_inet$(EXEEXT)'; \
+	b='test-arpa_inet'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-binary-io.sh.log: test-binary-io.sh
+	@p='test-binary-io.sh'; \
+	b='test-binary-io.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-bind.log: test-bind$(EXEEXT)
+	@p='test-bind$(EXEEXT)'; \
+	b='test-bind'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-bitrotate.log: test-bitrotate$(EXEEXT)
+	@p='test-bitrotate$(EXEEXT)'; \
+	b='test-bitrotate'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-btowc1.sh.log: test-btowc1.sh
+	@p='test-btowc1.sh'; \
+	b='test-btowc1.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-btowc2.sh.log: test-btowc2.sh
+	@p='test-btowc2.sh'; \
+	b='test-btowc2.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-c-ctype.log: test-c-ctype$(EXEEXT)
+	@p='test-c-ctype$(EXEEXT)'; \
+	b='test-c-ctype'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-c-stack.sh.log: test-c-stack.sh
+	@p='test-c-stack.sh'; \
+	b='test-c-stack.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-c-stack2.sh.log: test-c-stack2.sh
+	@p='test-c-stack2.sh'; \
+	b='test-c-stack2.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-c-strcase.sh.log: test-c-strcase.sh
+	@p='test-c-strcase.sh'; \
+	b='test-c-strcase.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-calloc-gnu.log: test-calloc-gnu$(EXEEXT)
+	@p='test-calloc-gnu$(EXEEXT)'; \
+	b='test-calloc-gnu'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-chdir.log: test-chdir$(EXEEXT)
+	@p='test-chdir$(EXEEXT)'; \
+	b='test-chdir'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-cloexec.log: test-cloexec$(EXEEXT)
+	@p='test-cloexec$(EXEEXT)'; \
+	b='test-cloexec'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-close.log: test-close$(EXEEXT)
+	@p='test-close$(EXEEXT)'; \
+	b='test-close'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-connect.log: test-connect$(EXEEXT)
+	@p='test-connect$(EXEEXT)'; \
+	b='test-connect'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-ctype.log: test-ctype$(EXEEXT)
+	@p='test-ctype$(EXEEXT)'; \
+	b='test-ctype'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-dfa-invalid-char-class.sh.log: test-dfa-invalid-char-class.sh
+	@p='test-dfa-invalid-char-class.sh'; \
+	b='test-dfa-invalid-char-class.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-dfa-invalid-merge.sh.log: test-dfa-invalid-merge.sh
+	@p='test-dfa-invalid-merge.sh'; \
+	b='test-dfa-invalid-merge.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-dfa-match.sh.log: test-dfa-match.sh
+	@p='test-dfa-match.sh'; \
+	b='test-dfa-match.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-dirent.log: test-dirent$(EXEEXT)
+	@p='test-dirent$(EXEEXT)'; \
+	b='test-dirent'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-dup.log: test-dup$(EXEEXT)
+	@p='test-dup$(EXEEXT)'; \
+	b='test-dup'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-dup2.log: test-dup2$(EXEEXT)
+	@p='test-dup2$(EXEEXT)'; \
+	b='test-dup2'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-dynarray.log: test-dynarray$(EXEEXT)
+	@p='test-dynarray$(EXEEXT)'; \
+	b='test-dynarray'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-environ.log: test-environ$(EXEEXT)
+	@p='test-environ$(EXEEXT)'; \
+	b='test-environ'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-errno.log: test-errno$(EXEEXT)
+	@p='test-errno$(EXEEXT)'; \
+	b='test-errno'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-exclude1.sh.log: test-exclude1.sh
+	@p='test-exclude1.sh'; \
+	b='test-exclude1.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-exclude2.sh.log: test-exclude2.sh
+	@p='test-exclude2.sh'; \
+	b='test-exclude2.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-exclude3.sh.log: test-exclude3.sh
+	@p='test-exclude3.sh'; \
+	b='test-exclude3.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-exclude4.sh.log: test-exclude4.sh
+	@p='test-exclude4.sh'; \
+	b='test-exclude4.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-exclude5.sh.log: test-exclude5.sh
+	@p='test-exclude5.sh'; \
+	b='test-exclude5.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-exclude6.sh.log: test-exclude6.sh
+	@p='test-exclude6.sh'; \
+	b='test-exclude6.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-exclude7.sh.log: test-exclude7.sh
+	@p='test-exclude7.sh'; \
+	b='test-exclude7.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-exclude8.sh.log: test-exclude8.sh
+	@p='test-exclude8.sh'; \
+	b='test-exclude8.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fchdir.log: test-fchdir$(EXEEXT)
+	@p='test-fchdir$(EXEEXT)'; \
+	b='test-fchdir'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fcntl-h.log: test-fcntl-h$(EXEEXT)
+	@p='test-fcntl-h$(EXEEXT)'; \
+	b='test-fcntl-h'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fcntl-safer.log: test-fcntl-safer$(EXEEXT)
+	@p='test-fcntl-safer$(EXEEXT)'; \
+	b='test-fcntl-safer'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fcntl.log: test-fcntl$(EXEEXT)
+	@p='test-fcntl$(EXEEXT)'; \
+	b='test-fcntl'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fdopen.log: test-fdopen$(EXEEXT)
+	@p='test-fdopen$(EXEEXT)'; \
+	b='test-fdopen'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fdopendir.log: test-fdopendir$(EXEEXT)
+	@p='test-fdopendir$(EXEEXT)'; \
+	b='test-fdopendir'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fgetc.log: test-fgetc$(EXEEXT)
+	@p='test-fgetc$(EXEEXT)'; \
+	b='test-fgetc'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-float.log: test-float$(EXEEXT)
+	@p='test-float$(EXEEXT)'; \
+	b='test-float'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fnmatch-h.log: test-fnmatch-h$(EXEEXT)
+	@p='test-fnmatch-h$(EXEEXT)'; \
+	b='test-fnmatch-h'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fnmatch.log: test-fnmatch$(EXEEXT)
+	@p='test-fnmatch$(EXEEXT)'; \
+	b='test-fnmatch'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fopen-gnu.log: test-fopen-gnu$(EXEEXT)
+	@p='test-fopen-gnu$(EXEEXT)'; \
+	b='test-fopen-gnu'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fopen.log: test-fopen$(EXEEXT)
+	@p='test-fopen$(EXEEXT)'; \
+	b='test-fopen'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fpending.sh.log: test-fpending.sh
+	@p='test-fpending.sh'; \
+	b='test-fpending.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fputc.log: test-fputc$(EXEEXT)
+	@p='test-fputc$(EXEEXT)'; \
+	b='test-fputc'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fread.log: test-fread$(EXEEXT)
+	@p='test-fread$(EXEEXT)'; \
+	b='test-fread'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-free.log: test-free$(EXEEXT)
+	@p='test-free$(EXEEXT)'; \
+	b='test-free'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fstat.log: test-fstat$(EXEEXT)
+	@p='test-fstat$(EXEEXT)'; \
+	b='test-fstat'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fstatat.log: test-fstatat$(EXEEXT)
+	@p='test-fstatat$(EXEEXT)'; \
+	b='test-fstatat'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-ftruncate.sh.log: test-ftruncate.sh
+	@p='test-ftruncate.sh'; \
+	b='test-ftruncate.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fwrite.log: test-fwrite$(EXEEXT)
+	@p='test-fwrite$(EXEEXT)'; \
+	b='test-fwrite'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-getcwd-lgpl.log: test-getcwd-lgpl$(EXEEXT)
+	@p='test-getcwd-lgpl$(EXEEXT)'; \
+	b='test-getcwd-lgpl'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-getdtablesize.log: test-getdtablesize$(EXEEXT)
+	@p='test-getdtablesize$(EXEEXT)'; \
+	b='test-getdtablesize'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-getopt-gnu.log: test-getopt-gnu$(EXEEXT)
+	@p='test-getopt-gnu$(EXEEXT)'; \
+	b='test-getopt-gnu'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-getopt-posix.log: test-getopt-posix$(EXEEXT)
+	@p='test-getopt-posix$(EXEEXT)'; \
+	b='test-getopt-posix'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-getprogname.log: test-getprogname$(EXEEXT)
+	@p='test-getprogname$(EXEEXT)'; \
+	b='test-getprogname'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-gettimeofday.log: test-gettimeofday$(EXEEXT)
+	@p='test-gettimeofday$(EXEEXT)'; \
+	b='test-gettimeofday'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-hard-locale.log: test-hard-locale$(EXEEXT)
+	@p='test-hard-locale$(EXEEXT)'; \
+	b='test-hard-locale'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-hash.log: test-hash$(EXEEXT)
+	@p='test-hash$(EXEEXT)'; \
+	b='test-hash'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-i-ring.log: test-i-ring$(EXEEXT)
+	@p='test-i-ring$(EXEEXT)'; \
+	b='test-i-ring'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-iconv-h.log: test-iconv-h$(EXEEXT)
+	@p='test-iconv-h$(EXEEXT)'; \
+	b='test-iconv-h'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-iconv.log: test-iconv$(EXEEXT)
+	@p='test-iconv$(EXEEXT)'; \
+	b='test-iconv'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-ignore-value.log: test-ignore-value$(EXEEXT)
+	@p='test-ignore-value$(EXEEXT)'; \
+	b='test-ignore-value'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-inet_pton.log: test-inet_pton$(EXEEXT)
+	@p='test-inet_pton$(EXEEXT)'; \
+	b='test-inet_pton'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-intprops.log: test-intprops$(EXEEXT)
+	@p='test-intprops$(EXEEXT)'; \
+	b='test-intprops'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-inttostr.log: test-inttostr$(EXEEXT)
+	@p='test-inttostr$(EXEEXT)'; \
+	b='test-inttostr'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-inttypes.log: test-inttypes$(EXEEXT)
+	@p='test-inttypes$(EXEEXT)'; \
+	b='test-inttypes'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-ioctl.log: test-ioctl$(EXEEXT)
+	@p='test-ioctl$(EXEEXT)'; \
+	b='test-ioctl'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-isatty.log: test-isatty$(EXEEXT)
+	@p='test-isatty$(EXEEXT)'; \
+	b='test-isatty'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-isblank.log: test-isblank$(EXEEXT)
+	@p='test-isblank$(EXEEXT)'; \
+	b='test-isblank'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-iswblank.log: test-iswblank$(EXEEXT)
+	@p='test-iswblank$(EXEEXT)'; \
+	b='test-iswblank'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-iswdigit.sh.log: test-iswdigit.sh
+	@p='test-iswdigit.sh'; \
+	b='test-iswdigit.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-iswxdigit.sh.log: test-iswxdigit.sh
+	@p='test-iswxdigit.sh'; \
+	b='test-iswxdigit.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-langinfo.log: test-langinfo$(EXEEXT)
+	@p='test-langinfo$(EXEEXT)'; \
+	b='test-langinfo'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-limits-h.log: test-limits-h$(EXEEXT)
+	@p='test-limits-h$(EXEEXT)'; \
+	b='test-limits-h'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-listen.log: test-listen$(EXEEXT)
+	@p='test-listen$(EXEEXT)'; \
+	b='test-listen'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-locale.log: test-locale$(EXEEXT)
+	@p='test-locale$(EXEEXT)'; \
+	b='test-locale'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-localeconv.log: test-localeconv$(EXEEXT)
+	@p='test-localeconv$(EXEEXT)'; \
+	b='test-localeconv'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-localename.log: test-localename$(EXEEXT)
+	@p='test-localename$(EXEEXT)'; \
+	b='test-localename'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-lseek.sh.log: test-lseek.sh
+	@p='test-lseek.sh'; \
+	b='test-lseek.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-lstat.log: test-lstat$(EXEEXT)
+	@p='test-lstat$(EXEEXT)'; \
+	b='test-lstat'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-malloc-gnu.log: test-malloc-gnu$(EXEEXT)
+	@p='test-malloc-gnu$(EXEEXT)'; \
+	b='test-malloc-gnu'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-malloca.log: test-malloca$(EXEEXT)
+	@p='test-malloca$(EXEEXT)'; \
+	b='test-malloca'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-mbscasecmp.sh.log: test-mbscasecmp.sh
+	@p='test-mbscasecmp.sh'; \
+	b='test-mbscasecmp.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-mbsinit.sh.log: test-mbsinit.sh
+	@p='test-mbsinit.sh'; \
+	b='test-mbsinit.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-mbsrtowcs1.sh.log: test-mbsrtowcs1.sh
+	@p='test-mbsrtowcs1.sh'; \
+	b='test-mbsrtowcs1.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-mbsrtowcs2.sh.log: test-mbsrtowcs2.sh
+	@p='test-mbsrtowcs2.sh'; \
+	b='test-mbsrtowcs2.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-mbsrtowcs3.sh.log: test-mbsrtowcs3.sh
+	@p='test-mbsrtowcs3.sh'; \
+	b='test-mbsrtowcs3.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-mbsrtowcs4.sh.log: test-mbsrtowcs4.sh
+	@p='test-mbsrtowcs4.sh'; \
+	b='test-mbsrtowcs4.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-mbsstr1.log: test-mbsstr1$(EXEEXT)
+	@p='test-mbsstr1$(EXEEXT)'; \
+	b='test-mbsstr1'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-mbsstr2.sh.log: test-mbsstr2.sh
+	@p='test-mbsstr2.sh'; \
+	b='test-mbsstr2.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-mbsstr3.sh.log: test-mbsstr3.sh
+	@p='test-mbsstr3.sh'; \
+	b='test-mbsstr3.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-memchr.log: test-memchr$(EXEEXT)
+	@p='test-memchr$(EXEEXT)'; \
+	b='test-memchr'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-memchr2.log: test-memchr2$(EXEEXT)
+	@p='test-memchr2$(EXEEXT)'; \
+	b='test-memchr2'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-memrchr.log: test-memrchr$(EXEEXT)
+	@p='test-memrchr$(EXEEXT)'; \
+	b='test-memrchr'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-nanosleep.log: test-nanosleep$(EXEEXT)
+	@p='test-nanosleep$(EXEEXT)'; \
+	b='test-nanosleep'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-netinet_in.log: test-netinet_in$(EXEEXT)
+	@p='test-netinet_in$(EXEEXT)'; \
+	b='test-netinet_in'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-nl_langinfo.sh.log: test-nl_langinfo.sh
+	@p='test-nl_langinfo.sh'; \
+	b='test-nl_langinfo.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-nl_langinfo-mt.log: test-nl_langinfo-mt$(EXEEXT)
+	@p='test-nl_langinfo-mt$(EXEEXT)'; \
+	b='test-nl_langinfo-mt'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-open.log: test-open$(EXEEXT)
+	@p='test-open$(EXEEXT)'; \
+	b='test-open'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-openat-safer.log: test-openat-safer$(EXEEXT)
+	@p='test-openat-safer$(EXEEXT)'; \
+	b='test-openat-safer'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-openat.log: test-openat$(EXEEXT)
+	@p='test-openat$(EXEEXT)'; \
+	b='test-openat'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-pathmax.log: test-pathmax$(EXEEXT)
+	@p='test-pathmax$(EXEEXT)'; \
+	b='test-pathmax'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-perror.sh.log: test-perror.sh
+	@p='test-perror.sh'; \
+	b='test-perror.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-perror2.log: test-perror2$(EXEEXT)
+	@p='test-perror2$(EXEEXT)'; \
+	b='test-perror2'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-pipe.log: test-pipe$(EXEEXT)
+	@p='test-pipe$(EXEEXT)'; \
+	b='test-pipe'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-pthread.log: test-pthread$(EXEEXT)
+	@p='test-pthread$(EXEEXT)'; \
+	b='test-pthread'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-pthread-thread.log: test-pthread-thread$(EXEEXT)
+	@p='test-pthread-thread$(EXEEXT)'; \
+	b='test-pthread-thread'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-pthread_sigmask1.log: test-pthread_sigmask1$(EXEEXT)
+	@p='test-pthread_sigmask1$(EXEEXT)'; \
+	b='test-pthread_sigmask1'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-pthread_sigmask2.log: test-pthread_sigmask2$(EXEEXT)
+	@p='test-pthread_sigmask2$(EXEEXT)'; \
+	b='test-pthread_sigmask2'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-quotearg-simple.log: test-quotearg-simple$(EXEEXT)
+	@p='test-quotearg-simple$(EXEEXT)'; \
+	b='test-quotearg-simple'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-raise.log: test-raise$(EXEEXT)
+	@p='test-raise$(EXEEXT)'; \
+	b='test-raise'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-rawmemchr.log: test-rawmemchr$(EXEEXT)
+	@p='test-rawmemchr$(EXEEXT)'; \
+	b='test-rawmemchr'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-read.log: test-read$(EXEEXT)
+	@p='test-read$(EXEEXT)'; \
+	b='test-read'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-realloc-gnu.log: test-realloc-gnu$(EXEEXT)
+	@p='test-realloc-gnu$(EXEEXT)'; \
+	b='test-realloc-gnu'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-reallocarray.log: test-reallocarray$(EXEEXT)
+	@p='test-reallocarray$(EXEEXT)'; \
+	b='test-reallocarray'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-regex.log: test-regex$(EXEEXT)
+	@p='test-regex$(EXEEXT)'; \
+	b='test-regex'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sched.log: test-sched$(EXEEXT)
+	@p='test-sched$(EXEEXT)'; \
+	b='test-sched'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-select.log: test-select$(EXEEXT)
+	@p='test-select$(EXEEXT)'; \
+	b='test-select'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-select-in.sh.log: test-select-in.sh
+	@p='test-select-in.sh'; \
+	b='test-select-in.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-select-out.sh.log: test-select-out.sh
+	@p='test-select-out.sh'; \
+	b='test-select-out.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-setenv.log: test-setenv$(EXEEXT)
+	@p='test-setenv$(EXEEXT)'; \
+	b='test-setenv'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-setlocale_null.log: test-setlocale_null$(EXEEXT)
+	@p='test-setlocale_null$(EXEEXT)'; \
+	b='test-setlocale_null'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-setlocale_null-mt-one.log: test-setlocale_null-mt-one$(EXEEXT)
+	@p='test-setlocale_null-mt-one$(EXEEXT)'; \
+	b='test-setlocale_null-mt-one'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-setlocale_null-mt-all.log: test-setlocale_null-mt-all$(EXEEXT)
+	@p='test-setlocale_null-mt-all$(EXEEXT)'; \
+	b='test-setlocale_null-mt-all'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-setlocale1.sh.log: test-setlocale1.sh
+	@p='test-setlocale1.sh'; \
+	b='test-setlocale1.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-setlocale2.sh.log: test-setlocale2.sh
+	@p='test-setlocale2.sh'; \
+	b='test-setlocale2.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-setsockopt.log: test-setsockopt$(EXEEXT)
+	@p='test-setsockopt$(EXEEXT)'; \
+	b='test-setsockopt'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sigaction.log: test-sigaction$(EXEEXT)
+	@p='test-sigaction$(EXEEXT)'; \
+	b='test-sigaction'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-signal-h.log: test-signal-h$(EXEEXT)
+	@p='test-signal-h$(EXEEXT)'; \
+	b='test-signal-h'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sigprocmask.log: test-sigprocmask$(EXEEXT)
+	@p='test-sigprocmask$(EXEEXT)'; \
+	b='test-sigprocmask'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sigsegv-catch-segv1.log: test-sigsegv-catch-segv1$(EXEEXT)
+	@p='test-sigsegv-catch-segv1$(EXEEXT)'; \
+	b='test-sigsegv-catch-segv1'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sigsegv-catch-segv2.log: test-sigsegv-catch-segv2$(EXEEXT)
+	@p='test-sigsegv-catch-segv2$(EXEEXT)'; \
+	b='test-sigsegv-catch-segv2'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sigsegv-catch-stackoverflow1.log: test-sigsegv-catch-stackoverflow1$(EXEEXT)
+	@p='test-sigsegv-catch-stackoverflow1$(EXEEXT)'; \
+	b='test-sigsegv-catch-stackoverflow1'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sigsegv-catch-stackoverflow2.log: test-sigsegv-catch-stackoverflow2$(EXEEXT)
+	@p='test-sigsegv-catch-stackoverflow2$(EXEEXT)'; \
+	b='test-sigsegv-catch-stackoverflow2'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sleep.log: test-sleep$(EXEEXT)
+	@p='test-sleep$(EXEEXT)'; \
+	b='test-sleep'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-snprintf.log: test-snprintf$(EXEEXT)
+	@p='test-snprintf$(EXEEXT)'; \
+	b='test-snprintf'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sockets.log: test-sockets$(EXEEXT)
+	@p='test-sockets$(EXEEXT)'; \
+	b='test-sockets'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-stat.log: test-stat$(EXEEXT)
+	@p='test-stat$(EXEEXT)'; \
+	b='test-stat'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-stat-time.log: test-stat-time$(EXEEXT)
+	@p='test-stat-time$(EXEEXT)'; \
+	b='test-stat-time'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-stdalign.log: test-stdalign$(EXEEXT)
+	@p='test-stdalign$(EXEEXT)'; \
+	b='test-stdalign'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-stdbool.log: test-stdbool$(EXEEXT)
+	@p='test-stdbool$(EXEEXT)'; \
+	b='test-stdbool'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-stddef.log: test-stddef$(EXEEXT)
+	@p='test-stddef$(EXEEXT)'; \
+	b='test-stddef'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-stdint.log: test-stdint$(EXEEXT)
+	@p='test-stdint$(EXEEXT)'; \
+	b='test-stdint'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-stdio.log: test-stdio$(EXEEXT)
+	@p='test-stdio$(EXEEXT)'; \
+	b='test-stdio'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-stdlib.log: test-stdlib$(EXEEXT)
+	@p='test-stdlib$(EXEEXT)'; \
+	b='test-stdlib'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-strerror.log: test-strerror$(EXEEXT)
+	@p='test-strerror$(EXEEXT)'; \
+	b='test-strerror'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-strerror_r.log: test-strerror_r$(EXEEXT)
+	@p='test-strerror_r$(EXEEXT)'; \
+	b='test-strerror_r'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-striconv.log: test-striconv$(EXEEXT)
+	@p='test-striconv$(EXEEXT)'; \
+	b='test-striconv'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-string.log: test-string$(EXEEXT)
+	@p='test-string$(EXEEXT)'; \
+	b='test-string'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-strnlen.log: test-strnlen$(EXEEXT)
+	@p='test-strnlen$(EXEEXT)'; \
+	b='test-strnlen'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-strstr.log: test-strstr$(EXEEXT)
+	@p='test-strstr$(EXEEXT)'; \
+	b='test-strstr'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-strtoimax.log: test-strtoimax$(EXEEXT)
+	@p='test-strtoimax$(EXEEXT)'; \
+	b='test-strtoimax'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-strtoll.log: test-strtoll$(EXEEXT)
+	@p='test-strtoll$(EXEEXT)'; \
+	b='test-strtoll'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-strtoull.log: test-strtoull$(EXEEXT)
+	@p='test-strtoull$(EXEEXT)'; \
+	b='test-strtoull'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-strtoumax.log: test-strtoumax$(EXEEXT)
+	@p='test-strtoumax$(EXEEXT)'; \
+	b='test-strtoumax'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-symlink.log: test-symlink$(EXEEXT)
+	@p='test-symlink$(EXEEXT)'; \
+	b='test-symlink'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sys_ioctl.log: test-sys_ioctl$(EXEEXT)
+	@p='test-sys_ioctl$(EXEEXT)'; \
+	b='test-sys_ioctl'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sys_select.log: test-sys_select$(EXEEXT)
+	@p='test-sys_select$(EXEEXT)'; \
+	b='test-sys_select'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sys_socket.log: test-sys_socket$(EXEEXT)
+	@p='test-sys_socket$(EXEEXT)'; \
+	b='test-sys_socket'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sys_stat.log: test-sys_stat$(EXEEXT)
+	@p='test-sys_stat$(EXEEXT)'; \
+	b='test-sys_stat'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sys_time.log: test-sys_time$(EXEEXT)
+	@p='test-sys_time$(EXEEXT)'; \
+	b='test-sys_time'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sys_types.log: test-sys_types$(EXEEXT)
+	@p='test-sys_types$(EXEEXT)'; \
+	b='test-sys_types'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sys_uio.log: test-sys_uio$(EXEEXT)
+	@p='test-sys_uio$(EXEEXT)'; \
+	b='test-sys_uio'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-init.sh.log: test-init.sh
+	@p='test-init.sh'; \
+	b='test-init.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-thread_self.log: test-thread_self$(EXEEXT)
+	@p='test-thread_self$(EXEEXT)'; \
+	b='test-thread_self'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-thread_create.log: test-thread_create$(EXEEXT)
+	@p='test-thread_create$(EXEEXT)'; \
+	b='test-thread_create'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-time.log: test-time$(EXEEXT)
+	@p='test-time$(EXEEXT)'; \
+	b='test-time'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-dup-safer.log: test-dup-safer$(EXEEXT)
+	@p='test-dup-safer$(EXEEXT)'; \
+	b='test-dup-safer'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-unistd.log: test-unistd$(EXEEXT)
+	@p='test-unistd$(EXEEXT)'; \
+	b='test-unistd'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-u8-mbtoucr.log: test-u8-mbtoucr$(EXEEXT)
+	@p='test-u8-mbtoucr$(EXEEXT)'; \
+	b='test-u8-mbtoucr'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-u8-uctomb.log: test-u8-uctomb$(EXEEXT)
+	@p='test-u8-uctomb$(EXEEXT)'; \
+	b='test-u8-uctomb'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
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+	@p='test-uc_width$(EXEEXT)'; \
+	b='test-uc_width'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+uniwidth/test-uc_width2.sh.log: uniwidth/test-uc_width2.sh
+	@p='uniwidth/test-uc_width2.sh'; \
+	b='uniwidth/test-uc_width2.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
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+	@p='test-unsetenv$(EXEEXT)'; \
+	b='test-unsetenv'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-vasnprintf.log: test-vasnprintf$(EXEEXT)
+	@p='test-vasnprintf$(EXEEXT)'; \
+	b='test-vasnprintf'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-vc-list-files-git.sh.log: test-vc-list-files-git.sh
+	@p='test-vc-list-files-git.sh'; \
+	b='test-vc-list-files-git.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-vc-list-files-cvs.sh.log: test-vc-list-files-cvs.sh
+	@p='test-vc-list-files-cvs.sh'; \
+	b='test-vc-list-files-cvs.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
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+	"$$tst" $(AM_TESTS_FD_REDIRECT)
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+	@p='test-verify$(EXEEXT)'; \
+	b='test-verify'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
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+	"$$tst" $(AM_TESTS_FD_REDIRECT)
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+	b='test-verify.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
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+test-version-etc.sh.log: test-version-etc.sh
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+	b='test-version-etc.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
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+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-wchar.log: test-wchar$(EXEEXT)
+	@p='test-wchar$(EXEEXT)'; \
+	b='test-wchar'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
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+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-wcrtomb.sh.log: test-wcrtomb.sh
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+	b='test-wcrtomb.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
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+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-wcrtomb-w32-1.sh.log: test-wcrtomb-w32-1.sh
+	@p='test-wcrtomb-w32-1.sh'; \
+	b='test-wcrtomb-w32-1.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
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+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-wcrtomb-w32-2.sh.log: test-wcrtomb-w32-2.sh
+	@p='test-wcrtomb-w32-2.sh'; \
+	b='test-wcrtomb-w32-2.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
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+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-wcrtomb-w32-3.sh.log: test-wcrtomb-w32-3.sh
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+	b='test-wcrtomb-w32-3.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
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+test-wcrtomb-w32-4.sh.log: test-wcrtomb-w32-4.sh
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+	b='test-wcrtomb-w32-4.sh'; \
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+	b='test-wcrtomb-w32-5.sh'; \
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+	b='test-wcrtomb-w32-6.sh'; \
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+	-rm -f uniwidth/$(DEPDIR)/test-uc_width.Po
+	-rm -f uniwidth/$(DEPDIR)/test-uc_width2.Po
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-recursive
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-local
+
+pdf: pdf-recursive
+
+pdf-am:
+
+ps: ps-recursive
+
+ps-am:
+
+uninstall-am:
+
+.MAKE: $(am__recursive_targets) all check check-am install install-am \
+	install-exec install-strip
+
+.PHONY: $(am__recursive_targets) CTAGS GTAGS TAGS all all-am \
+	am--depfiles check check-TESTS check-am clean \
+	clean-checkLIBRARIES clean-checkPROGRAMS clean-generic \
+	clean-local clean-noinstLIBRARIES clean-noinstPROGRAMS \
+	cscopelist-am ctags ctags-am distclean distclean-compile \
+	distclean-generic distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-man install-pdf install-pdf-am \
+	install-ps install-ps-am install-strip installcheck \
+	installcheck-am installdirs installdirs-am maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-local pdf pdf-am ps ps-am \
+	recheck tags tags-am uninstall uninstall-am
+
+.PRECIOUS: Makefile
+
+
+# We need the following in order to create <arpa/inet.h> when the system
+# doesn't have one.
+arpa/inet.h: arpa_inet.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H) $(ARG_NONNULL_H)
+	$(AM_V_at)$(MKDIR_P) arpa
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''HAVE_FEATURES_H''@|$(HAVE_FEATURES_H)|g' \
+	      -e 's|@''NEXT_ARPA_INET_H''@|$(NEXT_ARPA_INET_H)|g' \
+	      -e 's|@''HAVE_ARPA_INET_H''@|$(HAVE_ARPA_INET_H)|g' \
+	      -e 's/@''GNULIB_INET_NTOP''@/$(GL_GNULIB_INET_NTOP)/g' \
+	      -e 's/@''GNULIB_INET_PTON''@/$(GL_GNULIB_INET_PTON)/g' \
+	      -e 's|@''HAVE_WS2TCPIP_H''@|$(HAVE_WS2TCPIP_H)|g' \
+	      -e 's|@''HAVE_DECL_INET_NTOP''@|$(HAVE_DECL_INET_NTOP)|g' \
+	      -e 's|@''HAVE_DECL_INET_PTON''@|$(HAVE_DECL_INET_PTON)|g' \
+	      -e 's|@''REPLACE_INET_NTOP''@|$(REPLACE_INET_NTOP)|g' \
+	      -e 's|@''REPLACE_INET_PTON''@|$(REPLACE_INET_PTON)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/arpa_inet.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <float.h> when the system
+# doesn't have one that works with the given compiler.
+@GL_GENERATE_FLOAT_H_TRUE@float.h: float.in.h $(top_builddir)/config.status
+@GL_GENERATE_FLOAT_H_TRUE@	$(AM_V_GEN)rm -f $@-t $@ && \
+@GL_GENERATE_FLOAT_H_TRUE@	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+@GL_GENERATE_FLOAT_H_TRUE@	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+@GL_GENERATE_FLOAT_H_TRUE@	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+@GL_GENERATE_FLOAT_H_TRUE@	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+@GL_GENERATE_FLOAT_H_TRUE@	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+@GL_GENERATE_FLOAT_H_TRUE@	      -e 's|@''NEXT_FLOAT_H''@|$(NEXT_FLOAT_H)|g' \
+@GL_GENERATE_FLOAT_H_TRUE@	      -e 's|@''REPLACE_ITOLD''@|$(REPLACE_ITOLD)|g' \
+@GL_GENERATE_FLOAT_H_TRUE@	      < $(srcdir)/float.in.h; \
+@GL_GENERATE_FLOAT_H_TRUE@	} > $@-t && \
+@GL_GENERATE_FLOAT_H_TRUE@	mv $@-t $@
+@GL_GENERATE_FLOAT_H_FALSE@float.h: $(top_builddir)/config.status
+@GL_GENERATE_FLOAT_H_FALSE@	rm -f $@
+
+# We need the following in order to create <netinet/in.h> when the system
+# doesn't have one.
+@GL_GENERATE_NETINET_IN_H_TRUE@netinet/in.h: netinet_in.in.h $(top_builddir)/config.status
+@GL_GENERATE_NETINET_IN_H_TRUE@	$(AM_V_at)$(MKDIR_P) netinet
+@GL_GENERATE_NETINET_IN_H_TRUE@	$(AM_V_GEN)rm -f $@-t $@ && \
+@GL_GENERATE_NETINET_IN_H_TRUE@	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+@GL_GENERATE_NETINET_IN_H_TRUE@	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+@GL_GENERATE_NETINET_IN_H_TRUE@	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+@GL_GENERATE_NETINET_IN_H_TRUE@	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+@GL_GENERATE_NETINET_IN_H_TRUE@	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+@GL_GENERATE_NETINET_IN_H_TRUE@	      -e 's|@''NEXT_NETINET_IN_H''@|$(NEXT_NETINET_IN_H)|g' \
+@GL_GENERATE_NETINET_IN_H_TRUE@	      -e 's|@''HAVE_NETINET_IN_H''@|$(HAVE_NETINET_IN_H)|g' \
+@GL_GENERATE_NETINET_IN_H_TRUE@	      < $(srcdir)/netinet_in.in.h; \
+@GL_GENERATE_NETINET_IN_H_TRUE@	} > $@-t && \
+@GL_GENERATE_NETINET_IN_H_TRUE@	mv $@-t $@
+@GL_GENERATE_NETINET_IN_H_FALSE@netinet/in.h: $(top_builddir)/config.status
+@GL_GENERATE_NETINET_IN_H_FALSE@	rm -f $@
+
+# We need the following in order to create <pthread.h> when the system
+# doesn't have one that works with the given compiler.
+pthread.h: pthread.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(_NORETURN_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''HAVE_PTHREAD_H''@|$(HAVE_PTHREAD_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_PTHREAD_H''@|$(NEXT_PTHREAD_H)|g' \
+	      -e 's/@''GNULIB_PTHREAD_THREAD''@/$(GL_GNULIB_PTHREAD_THREAD)/g' \
+	      -e 's/@''GNULIB_PTHREAD_ONCE''@/$(GL_GNULIB_PTHREAD_ONCE)/g' \
+	      -e 's/@''GNULIB_PTHREAD_MUTEX''@/$(GL_GNULIB_PTHREAD_MUTEX)/g' \
+	      -e 's/@''GNULIB_PTHREAD_RWLOCK''@/$(GL_GNULIB_PTHREAD_RWLOCK)/g' \
+	      -e 's/@''GNULIB_PTHREAD_COND''@/$(GL_GNULIB_PTHREAD_COND)/g' \
+	      -e 's/@''GNULIB_PTHREAD_TSS''@/$(GL_GNULIB_PTHREAD_TSS)/g' \
+	      -e 's/@''GNULIB_PTHREAD_SPIN''@/$(GL_GNULIB_PTHREAD_SPIN)/g' \
+	      -e 's/@''GNULIB_PTHREAD_MUTEX_TIMEDLOCK''@/$(GL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK)/g' \
+	      -e 's|@''HAVE_PTHREAD_T''@|$(HAVE_PTHREAD_T)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPINLOCK_T''@|$(HAVE_PTHREAD_SPINLOCK_T)|g' \
+	      -e 's|@''HAVE_PTHREAD_CREATE_DETACHED''@|$(HAVE_PTHREAD_CREATE_DETACHED)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_RECURSIVE''@|$(HAVE_PTHREAD_MUTEX_RECURSIVE)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_ROBUST''@|$(HAVE_PTHREAD_MUTEX_ROBUST)|g' \
+	      -e 's|@''HAVE_PTHREAD_PROCESS_SHARED''@|$(HAVE_PTHREAD_PROCESS_SHARED)|g' \
+	      -e 's|@''HAVE_PTHREAD_CREATE''@|$(HAVE_PTHREAD_CREATE)|g' \
+	      -e 's|@''HAVE_PTHREAD_ATTR_INIT''@|$(HAVE_PTHREAD_ATTR_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_ATTR_GETDETACHSTATE''@|$(HAVE_PTHREAD_ATTR_GETDETACHSTATE)|g' \
+	      -e 's|@''HAVE_PTHREAD_ATTR_SETDETACHSTATE''@|$(HAVE_PTHREAD_ATTR_SETDETACHSTATE)|g' \
+	      -e 's|@''HAVE_PTHREAD_ATTR_DESTROY''@|$(HAVE_PTHREAD_ATTR_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_SELF''@|$(HAVE_PTHREAD_SELF)|g' \
+	      -e 's|@''HAVE_PTHREAD_EQUAL''@|$(HAVE_PTHREAD_EQUAL)|g' \
+	      -e 's|@''HAVE_PTHREAD_DETACH''@|$(HAVE_PTHREAD_DETACH)|g' \
+	      -e 's|@''HAVE_PTHREAD_JOIN''@|$(HAVE_PTHREAD_JOIN)|g' \
+	      -e 's|@''HAVE_PTHREAD_EXIT''@|$(HAVE_PTHREAD_EXIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_ONCE''@|$(HAVE_PTHREAD_ONCE)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_INIT''@|$(HAVE_PTHREAD_MUTEX_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_INIT''@|$(HAVE_PTHREAD_MUTEXATTR_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_GETTYPE''@|$(HAVE_PTHREAD_MUTEXATTR_GETTYPE)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_SETTYPE''@|$(HAVE_PTHREAD_MUTEXATTR_SETTYPE)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_GETROBUST''@|$(HAVE_PTHREAD_MUTEXATTR_GETROBUST)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_SETROBUST''@|$(HAVE_PTHREAD_MUTEXATTR_SETROBUST)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_DESTROY''@|$(HAVE_PTHREAD_MUTEXATTR_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_LOCK''@|$(HAVE_PTHREAD_MUTEX_LOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_TRYLOCK''@|$(HAVE_PTHREAD_MUTEX_TRYLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_TIMEDLOCK''@|$(HAVE_PTHREAD_MUTEX_TIMEDLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_UNLOCK''@|$(HAVE_PTHREAD_MUTEX_UNLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_DESTROY''@|$(HAVE_PTHREAD_MUTEX_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_INIT''@|$(HAVE_PTHREAD_RWLOCK_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCKATTR_INIT''@|$(HAVE_PTHREAD_RWLOCKATTR_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCKATTR_DESTROY''@|$(HAVE_PTHREAD_RWLOCKATTR_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_RDLOCK''@|$(HAVE_PTHREAD_RWLOCK_RDLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_WRLOCK''@|$(HAVE_PTHREAD_RWLOCK_WRLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_TRYRDLOCK''@|$(HAVE_PTHREAD_RWLOCK_TRYRDLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_TRYWRLOCK''@|$(HAVE_PTHREAD_RWLOCK_TRYWRLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK''@|$(HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK''@|$(HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_UNLOCK''@|$(HAVE_PTHREAD_RWLOCK_UNLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_DESTROY''@|$(HAVE_PTHREAD_RWLOCK_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_INIT''@|$(HAVE_PTHREAD_COND_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_CONDATTR_INIT''@|$(HAVE_PTHREAD_CONDATTR_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_CONDATTR_DESTROY''@|$(HAVE_PTHREAD_CONDATTR_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_WAIT''@|$(HAVE_PTHREAD_COND_WAIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_TIMEDWAIT''@|$(HAVE_PTHREAD_COND_TIMEDWAIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_SIGNAL''@|$(HAVE_PTHREAD_COND_SIGNAL)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_BROADCAST''@|$(HAVE_PTHREAD_COND_BROADCAST)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_DESTROY''@|$(HAVE_PTHREAD_COND_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_KEY_CREATE''@|$(HAVE_PTHREAD_KEY_CREATE)|g' \
+	      -e 's|@''HAVE_PTHREAD_SETSPECIFIC''@|$(HAVE_PTHREAD_SETSPECIFIC)|g' \
+	      -e 's|@''HAVE_PTHREAD_GETSPECIFIC''@|$(HAVE_PTHREAD_GETSPECIFIC)|g' \
+	      -e 's|@''HAVE_PTHREAD_KEY_DELETE''@|$(HAVE_PTHREAD_KEY_DELETE)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_INIT''@|$(HAVE_PTHREAD_SPIN_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_LOCK''@|$(HAVE_PTHREAD_SPIN_LOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_TRYLOCK''@|$(HAVE_PTHREAD_SPIN_TRYLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_UNLOCK''@|$(HAVE_PTHREAD_SPIN_UNLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_DESTROY''@|$(HAVE_PTHREAD_SPIN_DESTROY)|g' \
+	      < $(srcdir)/pthread.in.h | \
+	  sed -e 's|@''REPLACE_PTHREAD_CREATE''@|$(REPLACE_PTHREAD_CREATE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ATTR_INIT''@|$(REPLACE_PTHREAD_ATTR_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ATTR_GETDETACHSTATE''@|$(REPLACE_PTHREAD_ATTR_GETDETACHSTATE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ATTR_SETDETACHSTATE''@|$(REPLACE_PTHREAD_ATTR_SETDETACHSTATE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ATTR_DESTROY''@|$(REPLACE_PTHREAD_ATTR_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SELF''@|$(REPLACE_PTHREAD_SELF)|g' \
+	      -e 's|@''REPLACE_PTHREAD_EQUAL''@|$(REPLACE_PTHREAD_EQUAL)|g' \
+	      -e 's|@''REPLACE_PTHREAD_DETACH''@|$(REPLACE_PTHREAD_DETACH)|g' \
+	      -e 's|@''REPLACE_PTHREAD_JOIN''@|$(REPLACE_PTHREAD_JOIN)|g' \
+	      -e 's|@''REPLACE_PTHREAD_EXIT''@|$(REPLACE_PTHREAD_EXIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ONCE''@|$(REPLACE_PTHREAD_ONCE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_INIT''@|$(REPLACE_PTHREAD_MUTEX_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_INIT''@|$(REPLACE_PTHREAD_MUTEXATTR_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_GETTYPE''@|$(REPLACE_PTHREAD_MUTEXATTR_GETTYPE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_SETTYPE''@|$(REPLACE_PTHREAD_MUTEXATTR_SETTYPE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_GETROBUST''@|$(REPLACE_PTHREAD_MUTEXATTR_GETROBUST)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_SETROBUST''@|$(REPLACE_PTHREAD_MUTEXATTR_SETROBUST)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_DESTROY''@|$(REPLACE_PTHREAD_MUTEXATTR_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_LOCK''@|$(REPLACE_PTHREAD_MUTEX_LOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_TRYLOCK''@|$(REPLACE_PTHREAD_MUTEX_TRYLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_TIMEDLOCK''@|$(REPLACE_PTHREAD_MUTEX_TIMEDLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_UNLOCK''@|$(REPLACE_PTHREAD_MUTEX_UNLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_DESTROY''@|$(REPLACE_PTHREAD_MUTEX_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_INIT''@|$(REPLACE_PTHREAD_RWLOCK_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCKATTR_INIT''@|$(REPLACE_PTHREAD_RWLOCKATTR_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCKATTR_DESTROY''@|$(REPLACE_PTHREAD_RWLOCKATTR_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_RDLOCK''@|$(REPLACE_PTHREAD_RWLOCK_RDLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_WRLOCK''@|$(REPLACE_PTHREAD_RWLOCK_WRLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_TRYRDLOCK''@|$(REPLACE_PTHREAD_RWLOCK_TRYRDLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_TRYWRLOCK''@|$(REPLACE_PTHREAD_RWLOCK_TRYWRLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK''@|$(REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK''@|$(REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_UNLOCK''@|$(REPLACE_PTHREAD_RWLOCK_UNLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_DESTROY''@|$(REPLACE_PTHREAD_RWLOCK_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_INIT''@|$(REPLACE_PTHREAD_COND_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_CONDATTR_INIT''@|$(REPLACE_PTHREAD_CONDATTR_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_CONDATTR_DESTROY''@|$(REPLACE_PTHREAD_CONDATTR_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_WAIT''@|$(REPLACE_PTHREAD_COND_WAIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_TIMEDWAIT''@|$(REPLACE_PTHREAD_COND_TIMEDWAIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_SIGNAL''@|$(REPLACE_PTHREAD_COND_SIGNAL)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_BROADCAST''@|$(REPLACE_PTHREAD_COND_BROADCAST)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_DESTROY''@|$(REPLACE_PTHREAD_COND_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_KEY_CREATE''@|$(REPLACE_PTHREAD_KEY_CREATE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SETSPECIFIC''@|$(REPLACE_PTHREAD_SETSPECIFIC)|g' \
+	      -e 's|@''REPLACE_PTHREAD_GETSPECIFIC''@|$(REPLACE_PTHREAD_GETSPECIFIC)|g' \
+	      -e 's|@''REPLACE_PTHREAD_KEY_DELETE''@|$(REPLACE_PTHREAD_KEY_DELETE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_INIT''@|$(REPLACE_PTHREAD_SPIN_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_LOCK''@|$(REPLACE_PTHREAD_SPIN_LOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_TRYLOCK''@|$(REPLACE_PTHREAD_SPIN_TRYLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_UNLOCK''@|$(REPLACE_PTHREAD_SPIN_UNLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_DESTROY''@|$(REPLACE_PTHREAD_SPIN_DESTROY)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _Noreturn/r $(_NORETURN_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)'; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create a replacement for <sched.h> when
+# the system doesn't have one.
+sched.h: sched.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''HAVE_SCHED_H''@|$(HAVE_SCHED_H)|g' \
+	      -e 's|@''HAVE_SYS_CDEFS_H''@|$(HAVE_SYS_CDEFS_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SCHED_H''@|$(NEXT_SCHED_H)|g' \
+	      -e 's|@''HAVE_STRUCT_SCHED_PARAM''@|$(HAVE_STRUCT_SCHED_PARAM)|g' \
+	      -e 's/@''GNULIB_SCHED_YIELD''@/$(GL_GNULIB_SCHED_YIELD)/g' \
+	      -e 's|@''HAVE_SCHED_YIELD''@|$(HAVE_SCHED_YIELD)|g' \
+	      -e 's|@''REPLACE_SCHED_YIELD''@|$(REPLACE_SCHED_YIELD)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/sched.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <sys/ioctl.h> when the system
+# does not have a complete one.
+sys/ioctl.h: sys_ioctl.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_at)$(MKDIR_P) sys
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''HAVE_SYS_IOCTL_H''@|$(HAVE_SYS_IOCTL_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SYS_IOCTL_H''@|$(NEXT_SYS_IOCTL_H)|g' \
+	      -e 's/@''GNULIB_IOCTL''@/$(GL_GNULIB_IOCTL)/g' \
+	      -e 's|@''SYS_IOCTL_H_HAVE_WINSOCK2_H''@|$(SYS_IOCTL_H_HAVE_WINSOCK2_H)|g' \
+	      -e 's|@''SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS''@|$(SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS)|g' \
+	      -e 's|@''REPLACE_IOCTL''@|$(REPLACE_IOCTL)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/sys_ioctl.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <sys/select.h> when the system
+# doesn't have one that works with the given compiler.
+sys/select.h: sys_select.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_at)$(MKDIR_P) sys
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SYS_SELECT_H''@|$(NEXT_SYS_SELECT_H)|g' \
+	      -e 's|@''HAVE_SYS_SELECT_H''@|$(HAVE_SYS_SELECT_H)|g' \
+	      -e 's/@''GNULIB_PSELECT''@/$(GL_GNULIB_PSELECT)/g' \
+	      -e 's/@''GNULIB_SELECT''@/$(GL_GNULIB_SELECT)/g' \
+	      -e 's|@''HAVE_WINSOCK2_H''@|$(HAVE_WINSOCK2_H)|g' \
+	      -e 's|@''HAVE_PSELECT''@|$(HAVE_PSELECT)|g' \
+	      -e 's|@''REPLACE_PSELECT''@|$(REPLACE_PSELECT)|g' \
+	      -e 's|@''REPLACE_SELECT''@|$(REPLACE_SELECT)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/sys_select.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <sys/socket.h> when the system
+# doesn't have one that works with the given compiler.
+sys/socket.h: sys_socket.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H) $(ARG_NONNULL_H)
+	$(AM_V_at)$(MKDIR_P) sys
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SYS_SOCKET_H''@|$(NEXT_SYS_SOCKET_H)|g' \
+	      -e 's|@''HAVE_SYS_SOCKET_H''@|$(HAVE_SYS_SOCKET_H)|g' \
+	      -e 's/@''GNULIB_CLOSE''@/$(GL_GNULIB_CLOSE)/g' \
+	      -e 's/@''GNULIB_SOCKET''@/$(GL_GNULIB_SOCKET)/g' \
+	      -e 's/@''GNULIB_CONNECT''@/$(GL_GNULIB_CONNECT)/g' \
+	      -e 's/@''GNULIB_ACCEPT''@/$(GL_GNULIB_ACCEPT)/g' \
+	      -e 's/@''GNULIB_BIND''@/$(GL_GNULIB_BIND)/g' \
+	      -e 's/@''GNULIB_GETPEERNAME''@/$(GL_GNULIB_GETPEERNAME)/g' \
+	      -e 's/@''GNULIB_GETSOCKNAME''@/$(GL_GNULIB_GETSOCKNAME)/g' \
+	      -e 's/@''GNULIB_GETSOCKOPT''@/$(GL_GNULIB_GETSOCKOPT)/g' \
+	      -e 's/@''GNULIB_LISTEN''@/$(GL_GNULIB_LISTEN)/g' \
+	      -e 's/@''GNULIB_RECV''@/$(GL_GNULIB_RECV)/g' \
+	      -e 's/@''GNULIB_SEND''@/$(GL_GNULIB_SEND)/g' \
+	      -e 's/@''GNULIB_RECVFROM''@/$(GL_GNULIB_RECVFROM)/g' \
+	      -e 's/@''GNULIB_SENDTO''@/$(GL_GNULIB_SENDTO)/g' \
+	      -e 's/@''GNULIB_SETSOCKOPT''@/$(GL_GNULIB_SETSOCKOPT)/g' \
+	      -e 's/@''GNULIB_SHUTDOWN''@/$(GL_GNULIB_SHUTDOWN)/g' \
+	      -e 's/@''GNULIB_ACCEPT4''@/$(GL_GNULIB_ACCEPT4)/g' \
+	      -e 's|@''HAVE_WINSOCK2_H''@|$(HAVE_WINSOCK2_H)|g' \
+	      -e 's|@''HAVE_WS2TCPIP_H''@|$(HAVE_WS2TCPIP_H)|g' \
+	      -e 's|@''HAVE_STRUCT_SOCKADDR_STORAGE''@|$(HAVE_STRUCT_SOCKADDR_STORAGE)|g' \
+	      -e 's|@''HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY''@|$(HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY)|g' \
+	      -e 's|@''HAVE_SA_FAMILY_T''@|$(HAVE_SA_FAMILY_T)|g' \
+	      -e 's|@''HAVE_ACCEPT4''@|$(HAVE_ACCEPT4)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/sys_socket.in.h; \
+	} > $@-t && \
+	mv -f $@-t $@
+
+# We need the following in order to create <sys/time.h> when the system
+# doesn't have one that works with the given compiler.
+sys/time.h: sys_time.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_at)$(MKDIR_P) sys
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's/@''HAVE_SYS_TIME_H''@/$(HAVE_SYS_TIME_H)/g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SYS_TIME_H''@|$(NEXT_SYS_TIME_H)|g' \
+	      -e 's/@''GNULIB_GETTIMEOFDAY''@/$(GL_GNULIB_GETTIMEOFDAY)/g' \
+	      -e 's|@''HAVE_WINSOCK2_H''@|$(HAVE_WINSOCK2_H)|g' \
+	      -e 's/@''HAVE_GETTIMEOFDAY''@/$(HAVE_GETTIMEOFDAY)/g' \
+	      -e 's/@''HAVE_STRUCT_TIMEVAL''@/$(HAVE_STRUCT_TIMEVAL)/g' \
+	      -e 's/@''REPLACE_GETTIMEOFDAY''@/$(REPLACE_GETTIMEOFDAY)/g' \
+	      -e 's/@''REPLACE_STRUCT_TIMEVAL''@/$(REPLACE_STRUCT_TIMEVAL)/g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/sys_time.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <sys/uio.h> when the system
+# doesn't have one that works with the given compiler.
+sys/uio.h: sys_uio.in.h $(top_builddir)/config.status
+	$(AM_V_at)$(MKDIR_P) sys
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SYS_UIO_H''@|$(NEXT_SYS_UIO_H)|g' \
+	      -e 's|@''HAVE_SYS_UIO_H''@|$(HAVE_SYS_UIO_H)|g' \
+	      < $(srcdir)/sys_uio.in.h; \
+	} > $@-t && \
+	mv -f $@-t $@
+
+all: all-notice
+all-notice:
+	@echo '## ---------------------------------------------------- ##'
+	@echo '## ------------------- Gnulib tests ------------------- ##'
+	@echo '## You can ignore compiler warnings in this directory.  ##'
+	@echo '## ---------------------------------------------------- ##'
+
+check-am: check-notice
+check-notice:
+	@echo '## ---------------------------------------------------------------------- ##'
+	@echo '## ---------------------------- Gnulib tests ---------------------------- ##'
+	@echo '## Please report test failures in this directory to <bug-gnulib@gnu.org>. ##'
+	@echo '## ---------------------------------------------------------------------- ##'
+
+# Clean up after Solaris cc.
+clean-local:
+	rm -rf SunWS_cache
+
+mostlyclean-local: mostlyclean-generic
+	@for dir in '' $(MOSTLYCLEANDIRS); do \
+	  if test -n "$$dir" && test -d $$dir; then \
+	    echo "rmdir $$dir"; rmdir $$dir; \
+	  fi; \
+	done; \
+	:
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/grep/gnulib-tests/_Noreturn.h b/src/grep/gnulib-tests/_Noreturn.h
new file mode 100644
index 0000000..cb72f26
--- /dev/null
+++ b/src/grep/gnulib-tests/_Noreturn.h
@@ -0,0 +1,45 @@
+/* A C macro for declaring that a function does not return.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as published
+   by the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _Noreturn
+# if (defined __cplusplus \
+      && ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \
+          || (defined _MSC_VER && 1900 <= _MSC_VER)) \
+      && 0)
+    /* [[noreturn]] is not practically usable, because with it the syntax
+         extern _Noreturn void func (...);
+       would not be valid; such a declaration would only be valid with 'extern'
+       and '_Noreturn' swapped, or without the 'extern' keyword.  However, some
+       AIX system header files and several gnulib header files use precisely
+       this syntax with 'extern'.  */
+#  define _Noreturn [[noreturn]]
+# elif ((!defined __cplusplus || defined __clang__) \
+        && (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \
+            || (!defined __STRICT_ANSI__ \
+                && (__4 < __GNUC__ + (7 <= __GNUC_MINOR__) \
+                    || (defined __apple_build_version__ \
+                        ? 6000000 <= __apple_build_version__ \
+                        : 3 < __clang_major__ + (5 <= __clang_minor__))))))
+   /* _Noreturn works as-is.  */
+# elif (2 < __GNUC__ + (8 <= __GNUC_MINOR__) || defined __clang__ \
+        || 0x5110 <= __SUNPRO_C)
+#  define _Noreturn __attribute__ ((__noreturn__))
+# elif 1200 <= (defined _MSC_VER ? _MSC_VER : 0)
+#  define _Noreturn __declspec (noreturn)
+# else
+#  define _Noreturn
+# endif
+#endif
diff --git a/src/grep/gnulib-tests/accept.c b/src/grep/gnulib-tests/accept.c
new file mode 100644
index 0000000..71457db
--- /dev/null
+++ b/src/grep/gnulib-tests/accept.c
@@ -0,0 +1,52 @@
+/* accept.c --- wrappers for Windows accept function
+
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paolo Bonzini */
+
+#include <config.h>
+
+#define WIN32_LEAN_AND_MEAN
+/* Get winsock2.h. */
+#include <sys/socket.h>
+
+/* Get set_winsock_errno, FD_TO_SOCKET etc. */
+#include "w32sock.h"
+
+#undef accept
+
+int
+rpl_accept (int fd, struct sockaddr *addr, socklen_t *addrlen)
+{
+  SOCKET sock = FD_TO_SOCKET (fd);
+
+  if (sock == INVALID_SOCKET)
+    {
+      errno = EBADF;
+      return -1;
+    }
+  else
+    {
+      SOCKET fh = accept (sock, addr, addrlen);
+      if (fh == INVALID_SOCKET)
+        {
+          set_winsock_errno ();
+          return -1;
+        }
+      else
+        return SOCKET_TO_FD (fh);
+    }
+}
diff --git a/src/grep/gnulib-tests/altstack-util.h b/src/grep/gnulib-tests/altstack-util.h
new file mode 100644
index 0000000..fbd0d13
--- /dev/null
+++ b/src/grep/gnulib-tests/altstack-util.h
@@ -0,0 +1,66 @@
+/* Some auxiliary stuff for defining an alternate stack.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake and Bruno Haible.  */
+
+#include <stdint.h> /* uintptr_t */
+#include <string.h> /* for memset */
+
+#define MYSTACK_SIZE (1 << 24)
+
+/* glibc says: Users should use SIGSTKSZ as the size of user-supplied
+   buffers.  We want to detect stack overflow of the alternate stack
+   in a nicer manner than just crashing, so we overallocate in
+   comparison to what we hand libsigsegv.  Also, we intentionally hand
+   an unaligned pointer, to ensure the alternate stack still ends up
+   aligned.  */
+#define MYSTACK_CRUMPLE_ZONE 8192
+static char mystack_storage[MYSTACK_SIZE + 2 * MYSTACK_CRUMPLE_ZONE + 31];
+static char *mystack; /* MYSTACK_SIZE bytes in the middle of storage. */
+
+static void
+prepare_alternate_stack (void)
+{
+#ifdef SIGSTKSZ
+  if (MYSTACK_SIZE < SIGSTKSZ)
+    {
+      size_t size = SIGSTKSZ;
+      printf ("SIGSTKSZ=%zu exceeds MYSTACK_SIZE=%d\n", size, MYSTACK_SIZE);
+      exit (1);
+    }
+#endif
+  memset (mystack_storage, 's', sizeof mystack_storage);
+  mystack = (char *) ((uintptr_t) (mystack_storage + MYSTACK_CRUMPLE_ZONE) | 31);
+}
+
+static void
+check_alternate_stack_no_overflow (void)
+{
+  unsigned int i;
+
+  for (i = MYSTACK_CRUMPLE_ZONE; i > 0; i--)
+    if (*(mystack - i) != 's')
+      {
+        printf ("Alternate stack was exceeded by %u bytes!!\n", i);
+        exit (1);
+      }
+  for (i = MYSTACK_CRUMPLE_ZONE; i > 0; i--)
+    if (*(mystack + MYSTACK_SIZE - 1 + i) != 's')
+      {
+        printf ("Alternate stack was exceeded by %u bytes!!\n", i);
+        exit (1);
+      }
+}
diff --git a/src/grep/gnulib-tests/anytostr.c b/src/grep/gnulib-tests/anytostr.c
new file mode 100644
index 0000000..8294353
--- /dev/null
+++ b/src/grep/gnulib-tests/anytostr.c
@@ -0,0 +1,57 @@
+/* anytostr.c -- convert integers to printable strings
+
+   Copyright (C) 2001, 2006, 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert */
+
+/* Tell gcc not to warn about the (i < 0) test, below.  */
+#if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
+# pragma GCC diagnostic ignored "-Wtype-limits"
+#elif defined __clang__
+# pragma clang diagnostic ignored "-Wtautological-compare"
+#endif
+
+#include <config.h>
+
+#include "inttostr.h"
+
+/* Convert I to a printable string in BUF, which must be at least
+   INT_BUFSIZE_BOUND (INTTYPE) bytes long.  Return the address of the
+   printable string, which need not start at BUF.  */
+
+_GL_ATTRIBUTE_NODISCARD char *
+anytostr (inttype i, char *buf)
+{
+  char *p = buf + INT_STRLEN_BOUND (inttype);
+  *p = 0;
+
+  if (i < 0)
+    {
+      do
+        *--p = '0' - i % 10;
+      while ((i /= 10) != 0);
+
+      *--p = '-';
+    }
+  else
+    {
+      do
+        *--p = '0' + i % 10;
+      while ((i /= 10) != 0);
+    }
+
+  return p;
+}
diff --git a/src/grep/gnulib-tests/arg-nonnull.h b/src/grep/gnulib-tests/arg-nonnull.h
new file mode 100644
index 0000000..b4de241
--- /dev/null
+++ b/src/grep/gnulib-tests/arg-nonnull.h
@@ -0,0 +1,26 @@
+/* A C macro for declaring that specific arguments must not be NULL.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as published
+   by the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* _GL_ARG_NONNULL((n,...,m)) tells the compiler and static analyzer tools
+   that the values passed as arguments n, ..., m must be non-NULL pointers.
+   n = 1 stands for the first argument, n = 2 for the second argument etc.  */
+#ifndef _GL_ARG_NONNULL
+# if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || defined __clang__
+#  define _GL_ARG_NONNULL(params) __attribute__ ((__nonnull__ params))
+# else
+#  define _GL_ARG_NONNULL(params)
+# endif
+#endif
diff --git a/src/grep/gnulib-tests/arpa_inet.in.h b/src/grep/gnulib-tests/arpa_inet.in.h
new file mode 100644
index 0000000..9968067
--- /dev/null
+++ b/src/grep/gnulib-tests/arpa_inet.in.h
@@ -0,0 +1,150 @@
+/* A GNU-like <arpa/inet.h>.
+
+   Copyright (C) 2005-2006, 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _@GUARD_PREFIX@_ARPA_INET_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if @HAVE_FEATURES_H@
+# include <features.h> /* for __GLIBC__ */
+#endif
+
+/* Gnulib's sys/socket.h is responsible for defining socklen_t (used below) and
+   for pulling in winsock2.h etc. under MinGW.
+   But avoid namespace pollution on glibc systems.  */
+#ifndef __GLIBC__
+# include <sys/socket.h>
+#endif
+
+/* On NonStop Kernel, inet_ntop and inet_pton are declared in <netdb.h>.
+   But avoid namespace pollution on glibc systems.  */
+#if defined __TANDEM && !defined __GLIBC__
+# include <netdb.h>
+#endif
+
+#if @HAVE_ARPA_INET_H@
+
+/* The include_next requires a split double-inclusion guard.  */
+# @INCLUDE_NEXT@ @NEXT_ARPA_INET_H@
+
+#endif
+
+#ifndef _@GUARD_PREFIX@_ARPA_INET_H
+#define _@GUARD_PREFIX@_ARPA_INET_H
+
+/* Get all possible declarations of inet_ntop() and inet_pton().  */
+#if (@GNULIB_INET_NTOP@ || @GNULIB_INET_PTON@ || defined GNULIB_POSIXCHECK) \
+    && @HAVE_WS2TCPIP_H@
+# include <ws2tcpip.h>
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+
+#if @GNULIB_INET_NTOP@
+/* Converts an internet address from internal format to a printable,
+   presentable format.
+   AF is an internet address family, such as AF_INET or AF_INET6.
+   SRC points to a 'struct in_addr' (for AF_INET) or 'struct in6_addr'
+   (for AF_INET6).
+   DST points to a buffer having room for CNT bytes.
+   The printable representation of the address (in numeric form, not
+   surrounded by [...], no reverse DNS is done) is placed in DST, and
+   DST is returned.  If an error occurs, the return value is NULL and
+   errno is set.  If CNT bytes are not sufficient to hold the result,
+   the return value is NULL and errno is set to ENOSPC.  A good value
+   for CNT is 46.
+
+   For more details, see the POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/inet_ntop.html>.  */
+# if @REPLACE_INET_NTOP@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef inet_ntop
+#   define inet_ntop rpl_inet_ntop
+#  endif
+_GL_FUNCDECL_RPL (inet_ntop, const char *,
+                  (int af, const void *restrict src,
+                   char *restrict dst, socklen_t cnt)
+                  _GL_ARG_NONNULL ((2, 3)));
+_GL_CXXALIAS_RPL (inet_ntop, const char *,
+                  (int af, const void *restrict src,
+                   char *restrict dst, socklen_t cnt));
+# else
+#  if !@HAVE_DECL_INET_NTOP@
+_GL_FUNCDECL_SYS (inet_ntop, const char *,
+                  (int af, const void *restrict src,
+                   char *restrict dst, socklen_t cnt)
+                  _GL_ARG_NONNULL ((2, 3)));
+#  endif
+/* Need to cast, because on NonStop Kernel, the fourth parameter is
+                                            size_t cnt.  */
+_GL_CXXALIAS_SYS_CAST (inet_ntop, const char *,
+                       (int af, const void *restrict src,
+                        char *restrict dst, socklen_t cnt));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (inet_ntop);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef inet_ntop
+# if HAVE_RAW_DECL_INET_NTOP
+_GL_WARN_ON_USE (inet_ntop, "inet_ntop is unportable - "
+                 "use gnulib module inet_ntop for portability");
+# endif
+#endif
+
+#if @GNULIB_INET_PTON@
+# if @REPLACE_INET_PTON@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef inet_pton
+#   define inet_pton rpl_inet_pton
+#  endif
+_GL_FUNCDECL_RPL (inet_pton, int,
+                  (int af, const char *restrict src, void *restrict dst)
+                  _GL_ARG_NONNULL ((2, 3)));
+_GL_CXXALIAS_RPL (inet_pton, int,
+                  (int af, const char *restrict src, void *restrict dst));
+# else
+#  if !@HAVE_DECL_INET_PTON@
+_GL_FUNCDECL_SYS (inet_pton, int,
+                  (int af, const char *restrict src, void *restrict dst)
+                  _GL_ARG_NONNULL ((2, 3)));
+#  endif
+_GL_CXXALIAS_SYS (inet_pton, int,
+                  (int af, const char *restrict src, void *restrict dst));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (inet_pton);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef inet_pton
+# if HAVE_RAW_DECL_INET_PTON
+_GL_WARN_ON_USE (inet_pton, "inet_pton is unportable - "
+                 "use gnulib module inet_pton for portability");
+# endif
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_ARPA_INET_H */
+#endif /* _@GUARD_PREFIX@_ARPA_INET_H */
diff --git a/src/grep/gnulib-tests/asnprintf.c b/src/grep/gnulib-tests/asnprintf.c
new file mode 100644
index 0000000..c5367b2
--- /dev/null
+++ b/src/grep/gnulib-tests/asnprintf.c
@@ -0,0 +1,34 @@
+/* Formatted output to strings.
+   Copyright (C) 1999, 2002, 2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "vasnprintf.h"
+
+#include <stdarg.h>
+
+char *
+asnprintf (char *resultbuf, size_t *lengthp, const char *format, ...)
+{
+  va_list args;
+  char *result;
+
+  va_start (args, format);
+  result = vasnprintf (resultbuf, lengthp, format, args);
+  va_end (args);
+  return result;
+}
diff --git a/src/grep/gnulib-tests/bind.c b/src/grep/gnulib-tests/bind.c
new file mode 100644
index 0000000..0e47254
--- /dev/null
+++ b/src/grep/gnulib-tests/bind.c
@@ -0,0 +1,49 @@
+/* bind.c --- wrappers for Windows bind function
+
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paolo Bonzini */
+
+#include <config.h>
+
+#define WIN32_LEAN_AND_MEAN
+/* Get winsock2.h. */
+#include <sys/socket.h>
+
+/* Get set_winsock_errno, FD_TO_SOCKET etc. */
+#include "w32sock.h"
+
+#undef bind
+
+int
+rpl_bind (int fd, const struct sockaddr *sockaddr, socklen_t len)
+{
+  SOCKET sock = FD_TO_SOCKET (fd);
+
+  if (sock == INVALID_SOCKET)
+    {
+      errno = EBADF;
+      return -1;
+    }
+  else
+    {
+      int r = bind (sock, sockaddr, len);
+      if (r < 0)
+        set_winsock_errno ();
+
+      return r;
+    }
+}
diff --git a/src/grep/gnulib-tests/c++defs.h b/src/grep/gnulib-tests/c++defs.h
new file mode 100644
index 0000000..a47b61a
--- /dev/null
+++ b/src/grep/gnulib-tests/c++defs.h
@@ -0,0 +1,331 @@
+/* C++ compatible function declaration macros.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as published
+   by the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GL_CXXDEFS_H
+#define _GL_CXXDEFS_H
+
+/* Begin/end the GNULIB_NAMESPACE namespace.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_BEGIN_NAMESPACE namespace GNULIB_NAMESPACE {
+# define _GL_END_NAMESPACE }
+#else
+# define _GL_BEGIN_NAMESPACE
+# define _GL_END_NAMESPACE
+#endif
+
+/* The three most frequent use cases of these macros are:
+
+   * For providing a substitute for a function that is missing on some
+     platforms, but is declared and works fine on the platforms on which
+     it exists:
+
+       #if @GNULIB_FOO@
+       # if !@HAVE_FOO@
+       _GL_FUNCDECL_SYS (foo, ...);
+       # endif
+       _GL_CXXALIAS_SYS (foo, ...);
+       _GL_CXXALIASWARN (foo);
+       #elif defined GNULIB_POSIXCHECK
+       ...
+       #endif
+
+   * For providing a replacement for a function that exists on all platforms,
+     but is broken/insufficient and needs to be replaced on some platforms:
+
+       #if @GNULIB_FOO@
+       # if @REPLACE_FOO@
+       #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+       #   undef foo
+       #   define foo rpl_foo
+       #  endif
+       _GL_FUNCDECL_RPL (foo, ...);
+       _GL_CXXALIAS_RPL (foo, ...);
+       # else
+       _GL_CXXALIAS_SYS (foo, ...);
+       # endif
+       _GL_CXXALIASWARN (foo);
+       #elif defined GNULIB_POSIXCHECK
+       ...
+       #endif
+
+   * For providing a replacement for a function that exists on some platforms
+     but is broken/insufficient and needs to be replaced on some of them and
+     is additionally either missing or undeclared on some other platforms:
+
+       #if @GNULIB_FOO@
+       # if @REPLACE_FOO@
+       #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+       #   undef foo
+       #   define foo rpl_foo
+       #  endif
+       _GL_FUNCDECL_RPL (foo, ...);
+       _GL_CXXALIAS_RPL (foo, ...);
+       # else
+       #  if !@HAVE_FOO@   or   if !@HAVE_DECL_FOO@
+       _GL_FUNCDECL_SYS (foo, ...);
+       #  endif
+       _GL_CXXALIAS_SYS (foo, ...);
+       # endif
+       _GL_CXXALIASWARN (foo);
+       #elif defined GNULIB_POSIXCHECK
+       ...
+       #endif
+*/
+
+/* _GL_EXTERN_C declaration;
+   performs the declaration with C linkage.  */
+#if defined __cplusplus
+# define _GL_EXTERN_C extern "C"
+#else
+# define _GL_EXTERN_C extern
+#endif
+
+/* _GL_FUNCDECL_RPL (func, rettype, parameters_and_attributes);
+   declares a replacement function, named rpl_func, with the given prototype,
+   consisting of return type, parameters, and attributes.
+   Example:
+     _GL_FUNCDECL_RPL (open, int, (const char *filename, int flags, ...)
+                                  _GL_ARG_NONNULL ((1)));
+ */
+#define _GL_FUNCDECL_RPL(func,rettype,parameters_and_attributes) \
+  _GL_FUNCDECL_RPL_1 (rpl_##func, rettype, parameters_and_attributes)
+#define _GL_FUNCDECL_RPL_1(rpl_func,rettype,parameters_and_attributes) \
+  _GL_EXTERN_C rettype rpl_func parameters_and_attributes
+
+/* _GL_FUNCDECL_SYS (func, rettype, parameters_and_attributes);
+   declares the system function, named func, with the given prototype,
+   consisting of return type, parameters, and attributes.
+   Example:
+     _GL_FUNCDECL_SYS (open, int, (const char *filename, int flags, ...)
+                                  _GL_ARG_NONNULL ((1)));
+ */
+#define _GL_FUNCDECL_SYS(func,rettype,parameters_and_attributes) \
+  _GL_EXTERN_C rettype func parameters_and_attributes
+
+/* _GL_CXXALIAS_RPL (func, rettype, parameters);
+   declares a C++ alias called GNULIB_NAMESPACE::func
+   that redirects to rpl_func, if GNULIB_NAMESPACE is defined.
+   Example:
+     _GL_CXXALIAS_RPL (open, int, (const char *filename, int flags, ...));
+
+   Wrapping rpl_func in an object with an inline conversion operator
+   avoids a reference to rpl_func unless GNULIB_NAMESPACE::func is
+   actually used in the program.  */
+#define _GL_CXXALIAS_RPL(func,rettype,parameters) \
+  _GL_CXXALIAS_RPL_1 (func, rpl_##func, rettype, parameters)
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
+    namespace GNULIB_NAMESPACE                                \
+    {                                                         \
+      static const struct _gl_ ## func ## _wrapper            \
+      {                                                       \
+        typedef rettype (*type) parameters;                   \
+                                                              \
+        inline operator type () const                         \
+        {                                                     \
+          return ::rpl_func;                                  \
+        }                                                     \
+      } func = {};                                            \
+    }                                                         \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#else
+# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIAS_MDA (func, rettype, parameters);
+   is to be used when func is a Microsoft deprecated alias, on native Windows.
+   It declares a C++ alias called GNULIB_NAMESPACE::func
+   that redirects to _func, if GNULIB_NAMESPACE is defined.
+   Example:
+     _GL_CXXALIAS_MDA (open, int, (const char *filename, int flags, ...));
+ */
+#define _GL_CXXALIAS_MDA(func,rettype,parameters) \
+  _GL_CXXALIAS_RPL_1 (func, _##func, rettype, parameters)
+
+/* _GL_CXXALIAS_RPL_CAST_1 (func, rpl_func, rettype, parameters);
+   is like  _GL_CXXALIAS_RPL_1 (func, rpl_func, rettype, parameters);
+   except that the C function rpl_func may have a slightly different
+   declaration.  A cast is used to silence the "invalid conversion" error
+   that would otherwise occur.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \
+    namespace GNULIB_NAMESPACE                                     \
+    {                                                              \
+      static const struct _gl_ ## func ## _wrapper                 \
+      {                                                            \
+        typedef rettype (*type) parameters;                        \
+                                                                   \
+        inline operator type () const                              \
+        {                                                          \
+          return reinterpret_cast<type>(::rpl_func);               \
+        }                                                          \
+      } func = {};                                                 \
+    }                                                              \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#else
+# define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIAS_MDA_CAST (func, rettype, parameters);
+   is like  _GL_CXXALIAS_MDA (func, rettype, parameters);
+   except that the C function func may have a slightly different declaration.
+   A cast is used to silence the "invalid conversion" error that would
+   otherwise occur.  */
+#define _GL_CXXALIAS_MDA_CAST(func,rettype,parameters) \
+  _GL_CXXALIAS_RPL_CAST_1 (func, _##func, rettype, parameters)
+
+/* _GL_CXXALIAS_SYS (func, rettype, parameters);
+   declares a C++ alias called GNULIB_NAMESPACE::func
+   that redirects to the system provided function func, if GNULIB_NAMESPACE
+   is defined.
+   Example:
+     _GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...));
+
+   Wrapping func in an object with an inline conversion operator
+   avoids a reference to func unless GNULIB_NAMESPACE::func is
+   actually used in the program.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIAS_SYS(func,rettype,parameters)            \
+    namespace GNULIB_NAMESPACE                                \
+    {                                                         \
+      static const struct _gl_ ## func ## _wrapper            \
+      {                                                       \
+        typedef rettype (*type) parameters;                   \
+                                                              \
+        inline operator type () const                         \
+        {                                                     \
+          return ::func;                                      \
+        }                                                     \
+      } func = {};                                            \
+    }                                                         \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#else
+# define _GL_CXXALIAS_SYS(func,rettype,parameters) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIAS_SYS_CAST (func, rettype, parameters);
+   is like  _GL_CXXALIAS_SYS (func, rettype, parameters);
+   except that the C function func may have a slightly different declaration.
+   A cast is used to silence the "invalid conversion" error that would
+   otherwise occur.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \
+    namespace GNULIB_NAMESPACE                          \
+    {                                                   \
+      static const struct _gl_ ## func ## _wrapper      \
+      {                                                 \
+        typedef rettype (*type) parameters;             \
+                                                        \
+        inline operator type () const                   \
+        {                                               \
+          return reinterpret_cast<type>(::func);        \
+        }                                               \
+      } func = {};                                      \
+    }                                                   \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#else
+# define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIAS_SYS_CAST2 (func, rettype, parameters, rettype2, parameters2);
+   is like  _GL_CXXALIAS_SYS (func, rettype, parameters);
+   except that the C function is picked among a set of overloaded functions,
+   namely the one with rettype2 and parameters2.  Two consecutive casts
+   are used to silence the "cannot find a match" and "invalid conversion"
+   errors that would otherwise occur.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+  /* The outer cast must be a reinterpret_cast.
+     The inner cast: When the function is defined as a set of overloaded
+     functions, it works as a static_cast<>, choosing the designated variant.
+     When the function is defined as a single variant, it works as a
+     reinterpret_cast<>. The parenthesized cast syntax works both ways.  */
+# define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \
+    namespace GNULIB_NAMESPACE                                                \
+    {                                                                         \
+      static const struct _gl_ ## func ## _wrapper                            \
+      {                                                                       \
+        typedef rettype (*type) parameters;                                   \
+                                                                              \
+        inline operator type () const                                         \
+        {                                                                     \
+          return reinterpret_cast<type>((rettype2 (*) parameters2)(::func));  \
+        }                                                                     \
+      } func = {};                                                            \
+    }                                                                         \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#else
+# define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIASWARN (func);
+   causes a warning to be emitted when ::func is used but not when
+   GNULIB_NAMESPACE::func is used.  func must be defined without overloaded
+   variants.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIASWARN(func) \
+   _GL_CXXALIASWARN_1 (func, GNULIB_NAMESPACE)
+# define _GL_CXXALIASWARN_1(func,namespace) \
+   _GL_CXXALIASWARN_2 (func, namespace)
+/* To work around GCC bug <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>,
+   we enable the warning only when not optimizing.  */
+# if !(defined __GNUC__ && !defined __clang__ && __OPTIMIZE__)
+#  define _GL_CXXALIASWARN_2(func,namespace) \
+    _GL_WARN_ON_USE (func, \
+                     "The symbol ::" #func " refers to the system function. " \
+                     "Use " #namespace "::" #func " instead.")
+# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
+#  define _GL_CXXALIASWARN_2(func,namespace) \
+     extern __typeof__ (func) func
+# else
+#  define _GL_CXXALIASWARN_2(func,namespace) \
+     _GL_EXTERN_C int _gl_cxxalias_dummy
+# endif
+#else
+# define _GL_CXXALIASWARN(func) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIASWARN1 (func, rettype, parameters_and_attributes);
+   causes a warning to be emitted when the given overloaded variant of ::func
+   is used but not when GNULIB_NAMESPACE::func is used.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \
+   _GL_CXXALIASWARN1_1 (func, rettype, parameters_and_attributes, \
+                        GNULIB_NAMESPACE)
+# define _GL_CXXALIASWARN1_1(func,rettype,parameters_and_attributes,namespace) \
+   _GL_CXXALIASWARN1_2 (func, rettype, parameters_and_attributes, namespace)
+/* To work around GCC bug <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>,
+   we enable the warning only when not optimizing.  */
+# if !(defined __GNUC__ && !defined __clang__ && __OPTIMIZE__)
+#  define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
+    _GL_WARN_ON_USE_CXX (func, rettype, rettype, parameters_and_attributes, \
+                         "The symbol ::" #func " refers to the system function. " \
+                         "Use " #namespace "::" #func " instead.")
+# else
+#  define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
+     _GL_EXTERN_C int _gl_cxxalias_dummy
+# endif
+#else
+# define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+#endif /* _GL_CXXDEFS_H */
diff --git a/src/grep/gnulib-tests/connect.c b/src/grep/gnulib-tests/connect.c
new file mode 100644
index 0000000..b2b2e93
--- /dev/null
+++ b/src/grep/gnulib-tests/connect.c
@@ -0,0 +1,56 @@
+/* connect.c --- wrappers for Windows connect function
+
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paolo Bonzini */
+
+#include <config.h>
+
+#define WIN32_LEAN_AND_MEAN
+/* Get winsock2.h. */
+#include <sys/socket.h>
+
+/* Get set_winsock_errno, FD_TO_SOCKET etc. */
+#include "w32sock.h"
+
+#undef connect
+
+int
+rpl_connect (int fd, const struct sockaddr *sockaddr, socklen_t len)
+{
+  SOCKET sock = FD_TO_SOCKET (fd);
+
+  if (sock == INVALID_SOCKET)
+    {
+      errno = EBADF;
+      return -1;
+    }
+  else
+    {
+      int r = connect (sock, sockaddr, len);
+      if (r < 0)
+        {
+          /* EINPROGRESS is not returned by WinSock 2.0; for backwards
+             compatibility, connect(2) uses EWOULDBLOCK.  */
+          if (WSAGetLastError () == WSAEWOULDBLOCK)
+            WSASetLastError (WSAEINPROGRESS);
+
+          set_winsock_errno ();
+        }
+
+      return r;
+    }
+}
diff --git a/src/grep/gnulib-tests/fdopen.c b/src/grep/gnulib-tests/fdopen.c
new file mode 100644
index 0000000..a5266c8
--- /dev/null
+++ b/src/grep/gnulib-tests/fdopen.c
@@ -0,0 +1,73 @@
+/* Open a stream with a given file descriptor.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdio.h>
+
+#include <errno.h>
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+# include "msvc-inval.h"
+#endif
+
+#undef fdopen
+
+#if defined _WIN32 && !defined __CYGWIN__
+# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+static FILE *
+fdopen_nothrow (int fd, const char *mode)
+{
+  FILE *result;
+
+  TRY_MSVC_INVAL
+    {
+      result = _fdopen (fd, mode);
+    }
+  CATCH_MSVC_INVAL
+    {
+      result = NULL;
+    }
+  DONE_MSVC_INVAL;
+
+  return result;
+}
+# else
+#  define fdopen_nothrow _fdopen
+# endif
+#else
+# define fdopen_nothrow fdopen
+#endif
+
+FILE *
+rpl_fdopen (int fd, const char *mode)
+{
+  int saved_errno = errno;
+  FILE *fp;
+
+  errno = 0;
+  fp = fdopen_nothrow (fd, mode);
+  if (fp == NULL)
+    {
+      if (errno == 0)
+        errno = EBADF;
+    }
+  else
+    errno = saved_errno;
+
+  return fp;
+}
diff --git a/src/grep/gnulib-tests/float+.h b/src/grep/gnulib-tests/float+.h
new file mode 100644
index 0000000..ad891f6
--- /dev/null
+++ b/src/grep/gnulib-tests/float+.h
@@ -0,0 +1,147 @@
+/* Supplemental information about the floating-point formats.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2007.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _FLOATPLUS_H
+#define _FLOATPLUS_H
+
+#include <float.h>
+#include <limits.h>
+
+/* Number of bits in the mantissa of a floating-point number, including the
+   "hidden bit".  */
+#if FLT_RADIX == 2
+# define FLT_MANT_BIT FLT_MANT_DIG
+# define DBL_MANT_BIT DBL_MANT_DIG
+# define LDBL_MANT_BIT LDBL_MANT_DIG
+#elif FLT_RADIX == 4
+# define FLT_MANT_BIT (FLT_MANT_DIG * 2)
+# define DBL_MANT_BIT (DBL_MANT_DIG * 2)
+# define LDBL_MANT_BIT (LDBL_MANT_DIG * 2)
+#elif FLT_RADIX == 16
+# define FLT_MANT_BIT (FLT_MANT_DIG * 4)
+# define DBL_MANT_BIT (DBL_MANT_DIG * 4)
+# define LDBL_MANT_BIT (LDBL_MANT_DIG * 4)
+#endif
+
+/* Bit mask that can be used to mask the exponent, as an unsigned number.  */
+#define FLT_EXP_MASK ((FLT_MAX_EXP - FLT_MIN_EXP) | 7)
+#define DBL_EXP_MASK ((DBL_MAX_EXP - DBL_MIN_EXP) | 7)
+#define LDBL_EXP_MASK ((LDBL_MAX_EXP - LDBL_MIN_EXP) | 7)
+
+/* Number of bits used for the exponent of a floating-point number, including
+   the exponent's sign.  */
+#define FLT_EXP_BIT \
+  (FLT_EXP_MASK < 0x100 ? 8 : \
+   FLT_EXP_MASK < 0x200 ? 9 : \
+   FLT_EXP_MASK < 0x400 ? 10 : \
+   FLT_EXP_MASK < 0x800 ? 11 : \
+   FLT_EXP_MASK < 0x1000 ? 12 : \
+   FLT_EXP_MASK < 0x2000 ? 13 : \
+   FLT_EXP_MASK < 0x4000 ? 14 : \
+   FLT_EXP_MASK < 0x8000 ? 15 : \
+   FLT_EXP_MASK < 0x10000 ? 16 : \
+   FLT_EXP_MASK < 0x20000 ? 17 : \
+   FLT_EXP_MASK < 0x40000 ? 18 : \
+   FLT_EXP_MASK < 0x80000 ? 19 : \
+   FLT_EXP_MASK < 0x100000 ? 20 : \
+   FLT_EXP_MASK < 0x200000 ? 21 : \
+   FLT_EXP_MASK < 0x400000 ? 22 : \
+   FLT_EXP_MASK < 0x800000 ? 23 : \
+   FLT_EXP_MASK < 0x1000000 ? 24 : \
+   FLT_EXP_MASK < 0x2000000 ? 25 : \
+   FLT_EXP_MASK < 0x4000000 ? 26 : \
+   FLT_EXP_MASK < 0x8000000 ? 27 : \
+   FLT_EXP_MASK < 0x10000000 ? 28 : \
+   FLT_EXP_MASK < 0x20000000 ? 29 : \
+   FLT_EXP_MASK < 0x40000000 ? 30 : \
+   FLT_EXP_MASK <= 0x7fffffff ? 31 : \
+   32)
+#define DBL_EXP_BIT \
+  (DBL_EXP_MASK < 0x100 ? 8 : \
+   DBL_EXP_MASK < 0x200 ? 9 : \
+   DBL_EXP_MASK < 0x400 ? 10 : \
+   DBL_EXP_MASK < 0x800 ? 11 : \
+   DBL_EXP_MASK < 0x1000 ? 12 : \
+   DBL_EXP_MASK < 0x2000 ? 13 : \
+   DBL_EXP_MASK < 0x4000 ? 14 : \
+   DBL_EXP_MASK < 0x8000 ? 15 : \
+   DBL_EXP_MASK < 0x10000 ? 16 : \
+   DBL_EXP_MASK < 0x20000 ? 17 : \
+   DBL_EXP_MASK < 0x40000 ? 18 : \
+   DBL_EXP_MASK < 0x80000 ? 19 : \
+   DBL_EXP_MASK < 0x100000 ? 20 : \
+   DBL_EXP_MASK < 0x200000 ? 21 : \
+   DBL_EXP_MASK < 0x400000 ? 22 : \
+   DBL_EXP_MASK < 0x800000 ? 23 : \
+   DBL_EXP_MASK < 0x1000000 ? 24 : \
+   DBL_EXP_MASK < 0x2000000 ? 25 : \
+   DBL_EXP_MASK < 0x4000000 ? 26 : \
+   DBL_EXP_MASK < 0x8000000 ? 27 : \
+   DBL_EXP_MASK < 0x10000000 ? 28 : \
+   DBL_EXP_MASK < 0x20000000 ? 29 : \
+   DBL_EXP_MASK < 0x40000000 ? 30 : \
+   DBL_EXP_MASK <= 0x7fffffff ? 31 : \
+   32)
+#define LDBL_EXP_BIT \
+  (LDBL_EXP_MASK < 0x100 ? 8 : \
+   LDBL_EXP_MASK < 0x200 ? 9 : \
+   LDBL_EXP_MASK < 0x400 ? 10 : \
+   LDBL_EXP_MASK < 0x800 ? 11 : \
+   LDBL_EXP_MASK < 0x1000 ? 12 : \
+   LDBL_EXP_MASK < 0x2000 ? 13 : \
+   LDBL_EXP_MASK < 0x4000 ? 14 : \
+   LDBL_EXP_MASK < 0x8000 ? 15 : \
+   LDBL_EXP_MASK < 0x10000 ? 16 : \
+   LDBL_EXP_MASK < 0x20000 ? 17 : \
+   LDBL_EXP_MASK < 0x40000 ? 18 : \
+   LDBL_EXP_MASK < 0x80000 ? 19 : \
+   LDBL_EXP_MASK < 0x100000 ? 20 : \
+   LDBL_EXP_MASK < 0x200000 ? 21 : \
+   LDBL_EXP_MASK < 0x400000 ? 22 : \
+   LDBL_EXP_MASK < 0x800000 ? 23 : \
+   LDBL_EXP_MASK < 0x1000000 ? 24 : \
+   LDBL_EXP_MASK < 0x2000000 ? 25 : \
+   LDBL_EXP_MASK < 0x4000000 ? 26 : \
+   LDBL_EXP_MASK < 0x8000000 ? 27 : \
+   LDBL_EXP_MASK < 0x10000000 ? 28 : \
+   LDBL_EXP_MASK < 0x20000000 ? 29 : \
+   LDBL_EXP_MASK < 0x40000000 ? 30 : \
+   LDBL_EXP_MASK <= 0x7fffffff ? 31 : \
+   32)
+
+/* Number of bits used for a floating-point number: the mantissa (not
+   counting the "hidden bit", since it may or may not be explicit), the
+   exponent, and the sign.  */
+#define FLT_TOTAL_BIT ((FLT_MANT_BIT - 1) + FLT_EXP_BIT + 1)
+#define DBL_TOTAL_BIT ((DBL_MANT_BIT - 1) + DBL_EXP_BIT + 1)
+#define LDBL_TOTAL_BIT ((LDBL_MANT_BIT - 1) + LDBL_EXP_BIT + 1)
+
+/* Number of bytes used for a floating-point number.
+   This can be smaller than the 'sizeof'.  For example, on i386 systems,
+   'long double' most often have LDBL_MANT_BIT = 64, LDBL_EXP_BIT = 16, hence
+   LDBL_TOTAL_BIT = 80 bits, i.e. 10 bytes of consecutive memory, but
+   sizeof (long double) = 12 or = 16.  */
+#define SIZEOF_FLT ((FLT_TOTAL_BIT + CHAR_BIT - 1) / CHAR_BIT)
+#define SIZEOF_DBL ((DBL_TOTAL_BIT + CHAR_BIT - 1) / CHAR_BIT)
+#define SIZEOF_LDBL ((LDBL_TOTAL_BIT + CHAR_BIT - 1) / CHAR_BIT)
+
+/* Verify that SIZEOF_FLT <= sizeof (float) etc.  */
+typedef int verify_sizeof_flt[SIZEOF_FLT <= sizeof (float) ? 1 : -1];
+typedef int verify_sizeof_dbl[SIZEOF_DBL <= sizeof (double) ? 1 : - 1];
+typedef int verify_sizeof_ldbl[SIZEOF_LDBL <= sizeof (long double) ? 1 : - 1];
+
+#endif /* _FLOATPLUS_H */
diff --git a/src/grep/gnulib-tests/float.c b/src/grep/gnulib-tests/float.c
new file mode 100644
index 0000000..dd1e84a
--- /dev/null
+++ b/src/grep/gnulib-tests/float.c
@@ -0,0 +1,33 @@
+/* Auxiliary definitions for <float.h>.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2011.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <float.h>
+
+#if (defined _ARCH_PPC || defined _POWER) && (defined _AIX || defined __linux__) && (LDBL_MANT_DIG == 106) && defined __GNUC__
+const union gl_long_double_union gl_LDBL_MAX =
+  { { DBL_MAX, DBL_MAX / (double)134217728UL / (double)134217728UL } };
+#elif defined __i386__
+const union gl_long_double_union gl_LDBL_MAX =
+  { { 0xFFFFFFFF, 0xFFFFFFFF, 32766 } };
+#else
+/* This declaration is solely to ensure that after preprocessing
+   this file is never empty.  */
+typedef int dummy;
+#endif
diff --git a/src/grep/gnulib-tests/float.in.h b/src/grep/gnulib-tests/float.in.h
new file mode 100644
index 0000000..f52aba3
--- /dev/null
+++ b/src/grep/gnulib-tests/float.in.h
@@ -0,0 +1,194 @@
+/* A correct <float.h>.
+
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _@GUARD_PREFIX@_FLOAT_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard.  */
+#@INCLUDE_NEXT@ @NEXT_FLOAT_H@
+
+#ifndef _@GUARD_PREFIX@_FLOAT_H
+#define _@GUARD_PREFIX@_FLOAT_H
+
+/* 'long double' properties.  */
+
+#if defined __i386__ && (defined __BEOS__ || defined __OpenBSD__)
+/* Number of mantissa units, in base FLT_RADIX.  */
+# undef LDBL_MANT_DIG
+# define LDBL_MANT_DIG   64
+/* Number of decimal digits that is sufficient for representing a number.  */
+# undef LDBL_DIG
+# define LDBL_DIG        18
+/* x-1 where x is the smallest representable number > 1.  */
+# undef LDBL_EPSILON
+# define LDBL_EPSILON    1.0842021724855044340E-19L
+/* Minimum e such that FLT_RADIX^(e-1) is a normalized number.  */
+# undef LDBL_MIN_EXP
+# define LDBL_MIN_EXP    (-16381)
+/* Maximum e such that FLT_RADIX^(e-1) is a representable finite number.  */
+# undef LDBL_MAX_EXP
+# define LDBL_MAX_EXP    16384
+/* Minimum positive normalized number.  */
+# undef LDBL_MIN
+# define LDBL_MIN        3.3621031431120935063E-4932L
+/* Maximum representable finite number.  */
+# undef LDBL_MAX
+# define LDBL_MAX        1.1897314953572317650E+4932L
+/* Minimum e such that 10^e is in the range of normalized numbers.  */
+# undef LDBL_MIN_10_EXP
+# define LDBL_MIN_10_EXP (-4931)
+/* Maximum e such that 10^e is in the range of representable finite numbers.  */
+# undef LDBL_MAX_10_EXP
+# define LDBL_MAX_10_EXP 4932
+#endif
+
+/* On FreeBSD/x86 6.4, the 'long double' type really has only 53 bits of
+   precision in the compiler but 64 bits of precision at runtime.  See
+   <https://lists.gnu.org/r/bug-gnulib/2008-07/msg00063.html>.  */
+#if defined __i386__ && (defined __FreeBSD__ || defined __DragonFly__)
+/* Number of mantissa units, in base FLT_RADIX.  */
+# undef LDBL_MANT_DIG
+# define LDBL_MANT_DIG   64
+/* Number of decimal digits that is sufficient for representing a number.  */
+# undef LDBL_DIG
+# define LDBL_DIG        18
+/* x-1 where x is the smallest representable number > 1.  */
+# undef LDBL_EPSILON
+# define LDBL_EPSILON 1.084202172485504434007452800869941711426e-19L /* 2^-63 */
+/* Minimum e such that FLT_RADIX^(e-1) is a normalized number.  */
+# undef LDBL_MIN_EXP
+# define LDBL_MIN_EXP    (-16381)
+/* Maximum e such that FLT_RADIX^(e-1) is a representable finite number.  */
+# undef LDBL_MAX_EXP
+# define LDBL_MAX_EXP    16384
+/* Minimum positive normalized number.  */
+# undef LDBL_MIN
+# define LDBL_MIN        3.362103143112093506262677817321752E-4932L /* = 0x1p-16382L */
+/* Maximum representable finite number.  */
+# undef LDBL_MAX
+/* LDBL_MAX is represented as { 0xFFFFFFFF, 0xFFFFFFFF, 32766 }.
+   But the largest literal that GCC allows us to write is
+   0x0.fffffffffffff8p16384L = { 0xFFFFF800, 0xFFFFFFFF, 32766 }.
+   So, define it like this through a reference to an external variable
+
+     const unsigned int LDBL_MAX[3] = { 0xFFFFFFFF, 0xFFFFFFFF, 32766 };
+     extern const long double LDBL_MAX;
+
+   Unfortunately, this is not a constant expression.  */
+# if !GNULIB_defined_long_double_union
+union gl_long_double_union
+  {
+    struct { unsigned int lo; unsigned int hi; unsigned int exponent; } xd;
+    long double ld;
+  };
+#  define GNULIB_defined_long_double_union 1
+# endif
+extern const union gl_long_double_union gl_LDBL_MAX;
+# define LDBL_MAX (gl_LDBL_MAX.ld)
+/* Minimum e such that 10^e is in the range of normalized numbers.  */
+# undef LDBL_MIN_10_EXP
+# define LDBL_MIN_10_EXP (-4931)
+/* Maximum e such that 10^e is in the range of representable finite numbers.  */
+# undef LDBL_MAX_10_EXP
+# define LDBL_MAX_10_EXP 4932
+#endif
+
+/* On AIX 7.1 with gcc 4.2, the values of LDBL_MIN_EXP, LDBL_MIN, LDBL_MAX are
+   wrong.
+   On Linux/PowerPC with gcc 4.4, the value of LDBL_MAX is wrong.  */
+#if (defined _ARCH_PPC || defined _POWER) && defined _AIX && (LDBL_MANT_DIG == 106) && defined __GNUC__
+# undef LDBL_MIN_EXP
+# define LDBL_MIN_EXP DBL_MIN_EXP
+# undef LDBL_MIN_10_EXP
+# define LDBL_MIN_10_EXP DBL_MIN_10_EXP
+# undef LDBL_MIN
+# define LDBL_MIN 2.22507385850720138309023271733240406422e-308L /* DBL_MIN = 2^-1022 */
+#endif
+#if (defined _ARCH_PPC || defined _POWER) && (defined _AIX || defined __linux__) && (LDBL_MANT_DIG == 106) && defined __GNUC__
+# undef LDBL_MAX
+/* LDBL_MAX is represented as { 0x7FEFFFFF, 0xFFFFFFFF, 0x7C8FFFFF, 0xFFFFFFFF }.
+   It is not easy to define:
+     #define LDBL_MAX 1.79769313486231580793728971405302307166e308L
+   is too small, whereas
+     #define LDBL_MAX 1.79769313486231580793728971405302307167e308L
+   is too large.  Apparently a bug in GCC decimal-to-binary conversion.
+   Also, I can't get values larger than
+     #define LDBL63 ((long double) (1ULL << 63))
+     #define LDBL882 (LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63)
+     #define LDBL945 (LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63)
+     #define LDBL1008 (LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63)
+     #define LDBL_MAX (LDBL1008 * 65535.0L + LDBL945 * (long double) 9223372036821221375ULL + LDBL882 * (long double) 4611686018427387904ULL)
+   which is represented as { 0x7FEFFFFF, 0xFFFFFFFF, 0x7C8FFFFF, 0xF8000000 }.
+   So, define it like this through a reference to an external variable
+
+     const double LDBL_MAX[2] = { DBL_MAX, DBL_MAX / (double)134217728UL / (double)134217728UL };
+     extern const long double LDBL_MAX;
+
+   or through a pointer cast
+
+     #define LDBL_MAX \
+       (*(const long double *) (double[]) { DBL_MAX, DBL_MAX / (double)134217728UL / (double)134217728UL })
+
+   Unfortunately, this is not a constant expression, and the latter expression
+   does not work well when GCC is optimizing..  */
+# if !GNULIB_defined_long_double_union
+union gl_long_double_union
+  {
+    struct { double hi; double lo; } dd;
+    long double ld;
+  };
+#  define GNULIB_defined_long_double_union 1
+# endif
+extern const union gl_long_double_union gl_LDBL_MAX;
+# define LDBL_MAX (gl_LDBL_MAX.ld)
+#endif
+
+/* On IRIX 6.5, with cc, the value of LDBL_MANT_DIG is wrong.
+   On IRIX 6.5, with gcc 4.2, the values of LDBL_MIN_EXP, LDBL_MIN, LDBL_EPSILON
+   are wrong.  */
+#if defined __sgi && (LDBL_MANT_DIG >= 106)
+# undef LDBL_MANT_DIG
+# define LDBL_MANT_DIG 106
+# if defined __GNUC__
+#  undef LDBL_MIN_EXP
+#  define LDBL_MIN_EXP DBL_MIN_EXP
+#  undef LDBL_MIN_10_EXP
+#  define LDBL_MIN_10_EXP DBL_MIN_10_EXP
+#  undef LDBL_MIN
+#  define LDBL_MIN 2.22507385850720138309023271733240406422e-308L /* DBL_MIN = 2^-1022 */
+#  undef LDBL_EPSILON
+#  define LDBL_EPSILON 2.46519032881566189191165176650870696773e-32L /* 2^-105 */
+# endif
+#endif
+
+#if @REPLACE_ITOLD@
+/* Pull in a function that fixes the 'int' to 'long double' conversion
+   of glibc 2.7.  */
+extern
+# ifdef __cplusplus
+"C"
+# endif
+void _Qp_itoq (long double *, int);
+static void (*_gl_float_fix_itold) (long double *, int) = _Qp_itoq;
+#endif
+
+#endif /* _@GUARD_PREFIX@_FLOAT_H */
+#endif /* _@GUARD_PREFIX@_FLOAT_H */
diff --git a/src/grep/gnulib-tests/fpucw.h b/src/grep/gnulib-tests/fpucw.h
new file mode 100644
index 0000000..4060911
--- /dev/null
+++ b/src/grep/gnulib-tests/fpucw.h
@@ -0,0 +1,108 @@
+/* Manipulating the FPU control word.  -*- coding: utf-8 -*-
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2007.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _FPUCW_H
+#define _FPUCW_H
+
+/* The i386 floating point hardware (the 387 compatible FPU, not the modern
+   SSE/SSE2 hardware) has a controllable rounding precision.  It is specified
+   through the 'PC' bits in the FPU control word ('fctrl' register).  (See
+   the GNU libc i386 <fpu_control.h> header for details.)
+
+   On some platforms, such as Linux or Solaris, the default precision setting
+   is set to "extended precision".  This means that 'long double' instructions
+   operate correctly, but 'double' computations often produce slightly
+   different results as on strictly IEEE 754 conforming systems.
+
+   On some platforms, such as NetBSD, the default precision is set to
+   "double precision".  This means that 'long double' instructions will operate
+   only as 'double', i.e. lead to wrong results.  Similarly on FreeBSD 6.4, at
+   least for the division of 'long double' numbers.
+
+   The FPU control word is under control of the application, i.e. it is
+   not required to be set either way by the ABI.  (In fact, the i386 ABI
+   https://www.linux-mips.org/pub/linux/mips/doc/ABI/abi386-4.pdf page 3-12 = page 38
+   is not clear about it.  But in any case, gcc treats the control word
+   like a "preserved" register: it emits code that assumes that the control
+   word is preserved across calls, and it restores the control word at the
+   end of functions that modify it.)
+
+   See Vincent Lefèvre's page https://www.vinc17.net/research/extended.en.html
+   for a good explanation.
+   See https://web.archive.org/web/20060905133417/http://www.uwsg.iu.edu/hypermail/linux/kernel/0103.0/0453.html
+   some argumentation which setting should be the default.  */
+
+/* This header file provides the following facilities:
+     fpucw_t                        integral type holding the value of 'fctrl'
+     FPU_PC_MASK                    bit mask denoting the precision control
+     FPU_PC_DOUBLE                  precision control for 53 bits mantissa
+     FPU_PC_EXTENDED                precision control for 64 bits mantissa
+     GET_FPUCW ()                   yields the current FPU control word
+     SET_FPUCW (word)               sets the FPU control word
+     DECL_LONG_DOUBLE_ROUNDING      variable declaration for
+                                    BEGIN/END_LONG_DOUBLE_ROUNDING
+     BEGIN_LONG_DOUBLE_ROUNDING ()  starts a sequence of instructions with
+                                    'long double' safe operation precision
+     END_LONG_DOUBLE_ROUNDING ()    ends a sequence of instructions with
+                                    'long double' safe operation precision
+ */
+
+/* Inline assembler like this works only with GNU C and clang.  */
+#if (defined __i386__ || defined __x86_64__) && (defined __GNUC__ || defined __clang__)
+
+typedef unsigned short fpucw_t; /* glibc calls this fpu_control_t */
+
+# define FPU_PC_MASK 0x0300
+# define FPU_PC_DOUBLE 0x200    /* glibc calls this _FPU_DOUBLE */
+# define FPU_PC_EXTENDED 0x300  /* glibc calls this _FPU_EXTENDED */
+
+# define GET_FPUCW() __extension__ \
+  ({ fpucw_t _cw;                                               \
+     __asm__ __volatile__ ("fnstcw %0" : "=m" (*&_cw));         \
+     _cw;                                                       \
+   })
+# define SET_FPUCW(word) __extension__ \
+  (void)({ fpucw_t _ncw = (word);                               \
+           __asm__ __volatile__ ("fldcw %0" : : "m" (*&_ncw));  \
+         })
+
+# define DECL_LONG_DOUBLE_ROUNDING \
+  fpucw_t oldcw;
+# define BEGIN_LONG_DOUBLE_ROUNDING() \
+  (void)(oldcw = GET_FPUCW (),                                  \
+         SET_FPUCW ((oldcw & ~FPU_PC_MASK) | FPU_PC_EXTENDED))
+# define END_LONG_DOUBLE_ROUNDING() \
+  SET_FPUCW (oldcw)
+
+#else
+
+typedef unsigned int fpucw_t;
+
+# define FPU_PC_MASK 0
+# define FPU_PC_DOUBLE 0
+# define FPU_PC_EXTENDED 0
+
+# define GET_FPUCW() 0
+# define SET_FPUCW(word) (void)(word)
+
+# define DECL_LONG_DOUBLE_ROUNDING
+# define BEGIN_LONG_DOUBLE_ROUNDING()
+# define END_LONG_DOUBLE_ROUNDING()
+
+#endif
+
+#endif /* _FPUCW_H */
diff --git a/src/grep/gnulib-tests/ftruncate.c b/src/grep/gnulib-tests/ftruncate.c
new file mode 100644
index 0000000..873f302
--- /dev/null
+++ b/src/grep/gnulib-tests/ftruncate.c
@@ -0,0 +1,195 @@
+/* ftruncate emulations for native Windows.
+   Copyright (C) 1992-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+#if HAVE__CHSIZE
+/* A native Windows platform.  */
+
+# include <errno.h>
+
+# if _GL_WINDOWS_64_BIT_OFF_T
+
+/* Large File Support: off_t is 64-bit, but _chsize() takes only a 32-bit
+   argument.  So, define a 64-bit safe SetFileSize function ourselves.  */
+
+/* Ensure that <windows.h> declares GetFileSizeEx.  */
+#  if !defined _WIN32_WINNT || (_WIN32_WINNT < _WIN32_WINNT_WIN2K)
+#   undef _WIN32_WINNT
+#   define _WIN32_WINNT _WIN32_WINNT_WIN2K
+#  endif
+
+/* Get declarations of the native Windows API functions.  */
+#  define WIN32_LEAN_AND_MEAN
+#  include <windows.h>
+
+/* Get _get_osfhandle.  */
+#  if GNULIB_MSVC_NOTHROW
+#   include "msvc-nothrow.h"
+#  else
+#   include <io.h>
+#  endif
+
+static BOOL
+SetFileSize (HANDLE h, LONGLONG size)
+{
+  LARGE_INTEGER old_size;
+
+  if (!GetFileSizeEx (h, &old_size))
+    return FALSE;
+
+  if (size != old_size.QuadPart)
+    {
+      /* Duplicate the handle, so we are free to modify its file position.  */
+      HANDLE curr_process = GetCurrentProcess ();
+      HANDLE tmph;
+
+      if (!DuplicateHandle (curr_process,           /* SourceProcessHandle */
+                            h,                      /* SourceHandle */
+                            curr_process,           /* TargetProcessHandle */
+                            (PHANDLE) &tmph,        /* TargetHandle */
+                            (DWORD) 0,              /* DesiredAccess */
+                            FALSE,                  /* InheritHandle */
+                            DUPLICATE_SAME_ACCESS)) /* Options */
+        return FALSE;
+
+      if (size < old_size.QuadPart)
+        {
+          /* Reduce the size.  */
+          LONG size_hi = (LONG) (size >> 32);
+          if (SetFilePointer (tmph, (LONG) size, &size_hi, FILE_BEGIN)
+              == INVALID_SET_FILE_POINTER
+              && GetLastError() != NO_ERROR)
+            {
+              CloseHandle (tmph);
+              return FALSE;
+            }
+          if (!SetEndOfFile (tmph))
+            {
+              CloseHandle (tmph);
+              return FALSE;
+            }
+        }
+      else
+        {
+          /* Increase the size by adding zero bytes at the end.  */
+          static char zero_bytes[1024];
+          LONG pos_hi = 0;
+          LONG pos_lo = SetFilePointer (tmph, (LONG) 0, &pos_hi, FILE_END);
+          LONGLONG pos;
+          if (pos_lo == INVALID_SET_FILE_POINTER
+              && GetLastError() != NO_ERROR)
+            {
+              CloseHandle (tmph);
+              return FALSE;
+            }
+          pos = ((LONGLONG) pos_hi << 32) | (ULONGLONG) (ULONG) pos_lo;
+          while (pos < size)
+            {
+              DWORD written;
+              LONGLONG count = size - pos;
+              if (count > sizeof (zero_bytes))
+                count = sizeof (zero_bytes);
+              if (!WriteFile (tmph, zero_bytes, (DWORD) count, &written, NULL)
+                  || written == 0)
+                {
+                  CloseHandle (tmph);
+                  return FALSE;
+                }
+              pos += (ULONGLONG) (ULONG) written;
+            }
+        }
+      /* Close the handle.  */
+      CloseHandle (tmph);
+    }
+  return TRUE;
+}
+
+int
+ftruncate (int fd, off_t length)
+{
+  HANDLE handle = (HANDLE) _get_osfhandle (fd);
+
+  if (handle == INVALID_HANDLE_VALUE)
+    {
+      errno = EBADF;
+      return -1;
+    }
+  if (length < 0)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+  if (!SetFileSize (handle, length))
+    {
+      switch (GetLastError ())
+        {
+        case ERROR_ACCESS_DENIED:
+          errno = EACCES;
+          break;
+        case ERROR_HANDLE_DISK_FULL:
+        case ERROR_DISK_FULL:
+        case ERROR_DISK_TOO_FRAGMENTED:
+          errno = ENOSPC;
+          break;
+        default:
+          errno = EIO;
+          break;
+        }
+      return -1;
+    }
+  return 0;
+}
+
+# else
+
+#  include <io.h>
+
+#  if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+#   include "msvc-inval.h"
+static int
+chsize_nothrow (int fd, long length)
+{
+  int result;
+
+  TRY_MSVC_INVAL
+    {
+      result = _chsize (fd, length);
+    }
+  CATCH_MSVC_INVAL
+    {
+      result = -1;
+      errno = EBADF;
+    }
+  DONE_MSVC_INVAL;
+
+  return result;
+}
+#  else
+#   define chsize_nothrow _chsize
+#  endif
+
+int
+ftruncate (int fd, off_t length)
+{
+  return chsize_nothrow (fd, length);
+}
+
+# endif
+#endif
diff --git a/src/grep/gnulib-tests/gettimeofday.c b/src/grep/gnulib-tests/gettimeofday.c
new file mode 100644
index 0000000..2a222fc
--- /dev/null
+++ b/src/grep/gnulib-tests/gettimeofday.c
@@ -0,0 +1,153 @@
+/* Provide gettimeofday for systems that don't have it or for which it's broken.
+
+   Copyright (C) 2001-2003, 2005-2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering */
+
+#include <config.h>
+
+/* Specification.  */
+#include <sys/time.h>
+
+#include <time.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+# define WINDOWS_NATIVE
+# include <windows.h>
+#endif
+
+#ifdef WINDOWS_NATIVE
+
+/* Don't assume that UNICODE is not defined.  */
+# undef LoadLibrary
+# define LoadLibrary LoadLibraryA
+
+# if !(_WIN32_WINNT >= _WIN32_WINNT_WIN8)
+
+/* Avoid warnings from gcc -Wcast-function-type.  */
+#  define GetProcAddress \
+    (void *) GetProcAddress
+
+/* GetSystemTimePreciseAsFileTime was introduced only in Windows 8.  */
+typedef void (WINAPI * GetSystemTimePreciseAsFileTimeFuncType) (FILETIME *lpTime);
+static GetSystemTimePreciseAsFileTimeFuncType GetSystemTimePreciseAsFileTimeFunc = NULL;
+static BOOL initialized = FALSE;
+
+static void
+initialize (void)
+{
+  HMODULE kernel32 = LoadLibrary ("kernel32.dll");
+  if (kernel32 != NULL)
+    {
+      GetSystemTimePreciseAsFileTimeFunc =
+        (GetSystemTimePreciseAsFileTimeFuncType) GetProcAddress (kernel32, "GetSystemTimePreciseAsFileTime");
+    }
+  initialized = TRUE;
+}
+
+# else
+
+#  define GetSystemTimePreciseAsFileTimeFunc GetSystemTimePreciseAsFileTime
+
+# endif
+
+#endif
+
+/* This is a wrapper for gettimeofday.  It is used only on systems
+   that lack this function, or whose implementation of this function
+   causes problems.
+   Work around the bug in some systems whereby gettimeofday clobbers
+   the static buffer that localtime uses for its return value.  The
+   gettimeofday function from Mac OS X 10.0.4 (i.e., Darwin 1.3.7) has
+   this problem.  */
+
+int
+gettimeofday (struct timeval *restrict tv, void *restrict tz)
+{
+#undef gettimeofday
+#ifdef WINDOWS_NATIVE
+
+  /* On native Windows, there are two ways to get the current time:
+     GetSystemTimeAsFileTime
+     <https://docs.microsoft.com/en-us/windows/desktop/api/sysinfoapi/nf-sysinfoapi-getsystemtimeasfiletime>
+     or
+     GetSystemTimePreciseAsFileTime
+     <https://docs.microsoft.com/en-us/windows/desktop/api/sysinfoapi/nf-sysinfoapi-getsystemtimepreciseasfiletime>.
+     GetSystemTimeAsFileTime produces values that jump by increments of
+     15.627 milliseconds (!) on average.
+     Whereas GetSystemTimePreciseAsFileTime values usually jump by 1 or 2
+     microseconds.
+     More discussion on this topic:
+     <http://www.windowstimestamp.com/description>.  */
+  FILETIME current_time;
+
+# if !(_WIN32_WINNT >= _WIN32_WINNT_WIN8)
+  if (!initialized)
+    initialize ();
+# endif
+  if (GetSystemTimePreciseAsFileTimeFunc != NULL)
+    GetSystemTimePreciseAsFileTimeFunc (&current_time);
+  else
+    GetSystemTimeAsFileTime (&current_time);
+
+  /* Convert from FILETIME to 'struct timeval'.  */
+  /* FILETIME: <https://docs.microsoft.com/en-us/windows/desktop/api/minwinbase/ns-minwinbase-filetime> */
+  ULONGLONG since_1601 =
+    ((ULONGLONG) current_time.dwHighDateTime << 32)
+    | (ULONGLONG) current_time.dwLowDateTime;
+  /* Between 1601-01-01 and 1970-01-01 there were 280 normal years and 89 leap
+     years, in total 134774 days.  */
+  ULONGLONG since_1970 =
+    since_1601 - (ULONGLONG) 134774 * (ULONGLONG) 86400 * (ULONGLONG) 10000000;
+  ULONGLONG microseconds_since_1970 = since_1970 / (ULONGLONG) 10;
+  tv->tv_sec = microseconds_since_1970 / (ULONGLONG) 1000000;
+  tv->tv_usec = microseconds_since_1970 % (ULONGLONG) 1000000;
+
+  return 0;
+
+#else
+
+# if HAVE_GETTIMEOFDAY
+
+#  if defined timeval /* 'struct timeval' overridden by gnulib?  */
+#   undef timeval
+  struct timeval otv;
+  int result = gettimeofday (&otv, (struct timezone *) tz);
+  if (result == 0)
+    {
+      tv->tv_sec = otv.tv_sec;
+      tv->tv_usec = otv.tv_usec;
+    }
+#  else
+  int result = gettimeofday (tv, (struct timezone *) tz);
+#  endif
+
+  return result;
+
+# else
+
+#  if !defined OK_TO_USE_1S_CLOCK
+#   error "Only 1-second nominal clock resolution found.  Is that intended?" \
+          "If so, compile with the -DOK_TO_USE_1S_CLOCK option."
+#  endif
+  tv->tv_sec = time (NULL);
+  tv->tv_usec = 0;
+
+  return 0;
+
+# endif
+#endif
+}
diff --git a/src/grep/gnulib-tests/glthread/thread.c b/src/grep/gnulib-tests/glthread/thread.c
new file mode 100644
index 0000000..de44932
--- /dev/null
+++ b/src/grep/gnulib-tests/glthread/thread.c
@@ -0,0 +1,216 @@
+/* Creating and controlling threads.
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-posix.h, gthr-posix95.h, gthr-win32.h.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "glthread/thread.h"
+
+#include <stdlib.h>
+#include "glthread/lock.h"
+
+/* ========================================================================= */
+
+#if USE_ISOC_THREADS
+
+struct thrd_with_exitvalue
+{
+  thrd_t volatile tid;
+  void * volatile exitvalue;
+};
+
+/* The Thread-Specific Storage (TSS) key that allows to access each thread's
+   'struct thrd_with_exitvalue *' pointer.  */
+static tss_t thrd_with_exitvalue_key;
+
+/* Initializes thrd_with_exitvalue_key.
+   This function must only be called once.  */
+static void
+do_init_thrd_with_exitvalue_key (void)
+{
+  if (tss_create (&thrd_with_exitvalue_key, NULL) != thrd_success)
+    abort ();
+}
+
+/* Initializes thrd_with_exitvalue_key.  */
+static void
+init_thrd_with_exitvalue_key (void)
+{
+  static once_flag once = ONCE_FLAG_INIT;
+  call_once (&once, do_init_thrd_with_exitvalue_key);
+}
+
+typedef union
+        {
+          struct thrd_with_exitvalue t;
+          struct
+          {
+            thrd_t tid; /* reserve memory for t.tid */
+            void *(*mainfunc) (void *);
+            void *arg;
+          } a;
+        }
+        main_arg_t;
+
+static int
+thrd_main_func (void *pmarg)
+{
+  /* Unpack the object that combines mainfunc and arg.  */
+  main_arg_t *main_arg = (main_arg_t *) pmarg;
+  void *(*mainfunc) (void *) = main_arg->a.mainfunc;
+  void *arg = main_arg->a.arg;
+
+  if (tss_set (thrd_with_exitvalue_key, &main_arg->t) != thrd_success)
+    abort ();
+
+  /* Execute mainfunc, with arg as argument.  */
+  {
+    void *exitvalue = mainfunc (arg);
+    /* Store the exitvalue, for use by glthread_join().  */
+    main_arg->t.exitvalue = exitvalue;
+    return 0;
+  }
+}
+
+int
+glthread_create (gl_thread_t *threadp, void *(*mainfunc) (void *), void *arg)
+{
+  init_thrd_with_exitvalue_key ();
+  {
+    /* Combine mainfunc and arg in a single object.
+       A stack-allocated object does not work, because it would be out of
+       existence when thrd_create returns before thrd_main_func is
+       entered.  So, allocate it in the heap.  */
+    main_arg_t *main_arg = (main_arg_t *) malloc (sizeof (main_arg_t));
+    if (main_arg == NULL)
+      return ENOMEM;
+    main_arg->a.mainfunc = mainfunc;
+    main_arg->a.arg = arg;
+    switch (thrd_create ((thrd_t *) &main_arg->t.tid, thrd_main_func, main_arg))
+      {
+      case thrd_success:
+        break;
+      case thrd_nomem:
+        free (main_arg);
+        return ENOMEM;
+      default:
+        free (main_arg);
+        return EAGAIN;
+      }
+    *threadp = &main_arg->t;
+    return 0;
+  }
+}
+
+gl_thread_t
+gl_thread_self (void)
+{
+  init_thrd_with_exitvalue_key ();
+  {
+    gl_thread_t thread =
+      (struct thrd_with_exitvalue *) tss_get (thrd_with_exitvalue_key);
+    if (thread == NULL)
+      {
+        /* This happens only in threads that have not been created through
+           glthread_create(), such as the main thread.  */
+        for (;;)
+          {
+            thread =
+              (struct thrd_with_exitvalue *)
+              malloc (sizeof (struct thrd_with_exitvalue));
+            if (thread != NULL)
+              break;
+            /* Memory allocation failed.  There is not much we can do.  Have to
+               busy-loop, waiting for the availability of memory.  */
+            {
+              struct timespec ts;
+              ts.tv_sec = 1;
+              ts.tv_nsec = 0;
+              thrd_sleep (&ts, NULL);
+            }
+          }
+        thread->tid = thrd_current ();
+        thread->exitvalue = NULL; /* just to be deterministic */
+        if (tss_set (thrd_with_exitvalue_key, thread) != thrd_success)
+          abort ();
+      }
+    return thread;
+  }
+}
+
+int
+glthread_join (gl_thread_t thread, void **return_value_ptr)
+{
+  /* On Solaris 11.4, thrd_join crashes when the second argument we pass is
+     NULL.  */
+  int dummy;
+
+  if (thread == gl_thread_self ())
+    return EINVAL;
+  if (thrd_join (thread->tid, &dummy) != thrd_success)
+    return EINVAL;
+  if (return_value_ptr != NULL)
+    *return_value_ptr = thread->exitvalue;
+  free (thread);
+  return 0;
+}
+
+_Noreturn void
+gl_thread_exit (void *return_value)
+{
+  gl_thread_t thread = gl_thread_self ();
+  thread->exitvalue = return_value;
+  thrd_exit (0);
+}
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS
+
+#include <pthread.h>
+
+#if defined PTW32_VERSION || defined __MVS__
+
+const gl_thread_t gl_null_thread /* = { .p = NULL } */;
+
+#endif
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_WINDOWS_THREADS
+
+#endif
+
+/* ========================================================================= */
+
+gl_thread_t
+gl_thread_create (void *(*func) (void *arg), void *arg)
+{
+  gl_thread_t thread;
+  int ret;
+
+  ret = glthread_create (&thread, func, arg);
+  if (ret != 0)
+    abort ();
+  return thread;
+}
diff --git a/src/grep/gnulib-tests/glthread/thread.h b/src/grep/gnulib-tests/glthread/thread.h
new file mode 100644
index 0000000..44f05f3
--- /dev/null
+++ b/src/grep/gnulib-tests/glthread/thread.h
@@ -0,0 +1,338 @@
+/* Creating and controlling threads.
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-posix.h, gthr-posix95.h, gthr-win32.h.  */
+
+/* This file contains primitives for creating and controlling threads.
+
+   Thread data type: gl_thread_t.
+
+   Creating a thread:
+       thread = gl_thread_create (func, arg);
+   Or with control of error handling:
+       err = glthread_create (&thread, func, arg);
+       extern int glthread_create (gl_thread_t *result,
+                                   void *(*func) (void *), void *arg);
+
+   Querying and changing the signal mask of a thread (not supported on all
+   platforms):
+       gl_thread_sigmask (how, newmask, oldmask);
+   Or with control of error handling:
+       err = glthread_sigmask (how, newmask, oldmask);
+       extern int glthread_sigmask (int how, const sigset_t *newmask, sigset_t *oldmask);
+
+   Waiting for termination of another thread:
+       gl_thread_join (thread, &return_value);
+   Or with control of error handling:
+       err = glthread_join (thread, &return_value);
+       extern int glthread_join (gl_thread_t thread, void **return_value_ptr);
+
+   Getting a reference to the current thread:
+       current = gl_thread_self ();
+       extern gl_thread_t gl_thread_self (void);
+
+   Getting a reference to the current thread as a pointer, for debugging:
+       ptr = gl_thread_self_pointer ();
+       extern void * gl_thread_self_pointer (void);
+
+   Terminating the current thread:
+       gl_thread_exit (return_value);
+       extern _Noreturn void gl_thread_exit (void *return_value);
+
+   Requesting custom code to be executed at fork() time (not supported on all
+   platforms):
+       gl_thread_atfork (prepare_func, parent_func, child_func);
+   Or with control of error handling:
+       err = glthread_atfork (prepare_func, parent_func, child_func);
+       extern int glthread_atfork (void (*prepare_func) (void),
+                                   void (*parent_func) (void),
+                                   void (*child_func) (void));
+   Note that even on platforms where this is supported, use of fork() and
+   threads together is problematic, see
+     <https://lists.gnu.org/r/bug-gnulib/2008-08/msg00062.html>
+ */
+
+
+#ifndef _GLTHREAD_THREAD_H
+#define _GLTHREAD_THREAD_H
+
+#include <errno.h>
+#include <stdlib.h>
+
+#if !defined c11_threads_in_use
+# if HAVE_THREADS_H && USE_POSIX_THREADS_FROM_LIBC
+#  define c11_threads_in_use() 1
+# elif HAVE_THREADS_H && USE_POSIX_THREADS_WEAK
+#  include <threads.h>
+#  pragma weak thrd_exit
+#  define c11_threads_in_use() (thrd_exit != NULL)
+# else
+#  define c11_threads_in_use() 0
+# endif
+#endif
+
+/* ========================================================================= */
+
+#if USE_ISOC_THREADS
+
+/* Use the ISO C threads library.  */
+
+# include <threads.h>
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+/* -------------------------- gl_thread_t datatype -------------------------- */
+
+typedef struct thrd_with_exitvalue *gl_thread_t;
+extern int glthread_create (gl_thread_t *threadp,
+                            void *(*func) (void *), void *arg);
+# define glthread_sigmask(HOW, SET, OSET) \
+    pthread_sigmask (HOW, SET, OSET)
+extern int glthread_join (gl_thread_t thread, void **return_value_ptr);
+extern gl_thread_t gl_thread_self (void);
+# define gl_thread_self_pointer() \
+    (void *) gl_thread_self ()
+extern _Noreturn void gl_thread_exit (void *return_value);
+# define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) 0
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS
+
+/* Use the POSIX threads library.  */
+
+# include <pthread.h>
+
+/* On IRIX, pthread_atfork is declared in <unistd.h>, not in <pthread.h>.  */
+# if defined __sgi
+#  include <unistd.h>
+# endif
+
+# if USE_POSIX_THREADS_WEAK
+/* Compilers other than GCC need to see the declaration of pthread_sigmask
+   before the "#pragma weak pthread_sigmask" below.  */
+#  include <signal.h>
+# endif
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+# if PTHREAD_IN_USE_DETECTION_HARD
+
+/* The pthread_in_use() detection needs to be done at runtime.  */
+#  define pthread_in_use() \
+     glthread_in_use ()
+extern int glthread_in_use (void);
+
+# endif
+
+# if USE_POSIX_THREADS_WEAK
+
+/* Use weak references to the POSIX threads library.  */
+
+/* Weak references avoid dragging in external libraries if the other parts
+   of the program don't use them.  Here we use them, because we don't want
+   every program that uses libintl to depend on libpthread.  This assumes
+   that libpthread would not be loaded after libintl; i.e. if libintl is
+   loaded first, by an executable that does not depend on libpthread, and
+   then a module is dynamically loaded that depends on libpthread, libintl
+   will not be multithread-safe.  */
+
+/* The way to test at runtime whether libpthread is present is to test
+   whether a function pointer's value, such as &pthread_mutex_init, is
+   non-NULL.  However, some versions of GCC have a bug through which, in
+   PIC mode, &foo != NULL always evaluates to true if there is a direct
+   call to foo(...) in the same function.  To avoid this, we test the
+   address of a function in libpthread that we don't use.  */
+
+#  ifndef pthread_sigmask /* Do not declare rpl_pthread_sigmask weak.  */
+#   pragma weak pthread_sigmask
+#  endif
+
+#  pragma weak pthread_join
+#  ifndef pthread_self
+#   pragma weak pthread_self
+#  endif
+#  pragma weak pthread_exit
+#  if HAVE_PTHREAD_ATFORK
+#   pragma weak pthread_atfork
+#  endif
+
+#  if !PTHREAD_IN_USE_DETECTION_HARD
+#   pragma weak pthread_mutexattr_gettype
+#   define pthread_in_use() \
+      (pthread_mutexattr_gettype != NULL || c11_threads_in_use ())
+#  endif
+
+# else
+
+#  if !PTHREAD_IN_USE_DETECTION_HARD
+#   define pthread_in_use() 1
+#  endif
+
+# endif
+
+/* -------------------------- gl_thread_t datatype -------------------------- */
+
+/* This choice of gl_thread_t assumes that
+     pthread_equal (a, b)  is equivalent to  ((a) == (b)).
+   This is the case on all platforms in use in 2008.  */
+typedef pthread_t gl_thread_t;
+# define glthread_create(THREADP, FUNC, ARG) \
+    (pthread_in_use () ? pthread_create (THREADP, NULL, FUNC, ARG) : ENOSYS)
+# define glthread_sigmask(HOW, SET, OSET) \
+    (pthread_in_use () ? pthread_sigmask (HOW, SET, OSET) : 0)
+# define glthread_join(THREAD, RETVALP) \
+    (pthread_in_use () ? pthread_join (THREAD, RETVALP) : 0)
+# ifdef PTW32_VERSION
+   /* In pthreads-win32, pthread_t is a struct with a pointer field 'p' and
+      other fields.  */
+#  define gl_thread_self() \
+     (pthread_in_use () ? pthread_self () : gl_null_thread)
+#  define gl_thread_self_pointer() \
+     (pthread_in_use () ? pthread_self ().p : NULL)
+extern const gl_thread_t gl_null_thread;
+# elif defined __MVS__
+   /* On IBM z/OS, pthread_t is a struct with an 8-byte '__' field.
+      The first three bytes of this field appear to uniquely identify a
+      pthread_t, though not necessarily representing a pointer.  */
+#  define gl_thread_self() \
+     (pthread_in_use () ? pthread_self () : gl_null_thread)
+#  define gl_thread_self_pointer() \
+     (pthread_in_use () ? *((void **) pthread_self ().__) : NULL)
+extern const gl_thread_t gl_null_thread;
+# else
+#  define gl_thread_self() \
+     (pthread_in_use () ? pthread_self () : (pthread_t) 0)
+#  define gl_thread_self_pointer() \
+     (pthread_in_use () ? (void *) pthread_self () : NULL)
+# endif
+# define gl_thread_exit(RETVAL) \
+    (void) (pthread_in_use () ? (pthread_exit (RETVAL), 0) : 0)
+
+# if HAVE_PTHREAD_ATFORK
+#  define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) \
+     (pthread_in_use () ? pthread_atfork (PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) : 0)
+# else
+#  define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) 0
+# endif
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_WINDOWS_THREADS
+
+# define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+# include <windows.h>
+
+# include "windows-thread.h"
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+/* -------------------------- gl_thread_t datatype -------------------------- */
+
+typedef glwthread_thread_t gl_thread_t;
+# define glthread_create(THREADP, FUNC, ARG) \
+    glwthread_thread_create (THREADP, 0, FUNC, ARG)
+# define glthread_sigmask(HOW, SET, OSET) \
+    /* unsupported */ 0
+# define glthread_join(THREAD, RETVALP) \
+    glwthread_thread_join (THREAD, RETVALP)
+# define gl_thread_self() \
+    glwthread_thread_self ()
+# define gl_thread_self_pointer() \
+    gl_thread_self ()
+# define gl_thread_exit(RETVAL) \
+    glwthread_thread_exit (RETVAL)
+# define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) 0
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if !(USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS)
+
+/* Provide dummy implementation if threads are not supported.  */
+
+typedef int gl_thread_t;
+# define glthread_create(THREADP, FUNC, ARG) ENOSYS
+# define glthread_sigmask(HOW, SET, OSET) 0
+# define glthread_join(THREAD, RETVALP) 0
+# define gl_thread_self() 0
+# define gl_thread_self_pointer() \
+    ((void *) gl_thread_self ())
+# define gl_thread_exit(RETVAL) (void)0
+# define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) 0
+
+#endif
+
+/* ========================================================================= */
+
+/* Macros with built-in error handling.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern gl_thread_t gl_thread_create (void *(*func) (void *arg), void *arg);
+#define gl_thread_sigmask(HOW, SET, OSET)     \
+   do                                         \
+     {                                        \
+       if (glthread_sigmask (HOW, SET, OSET)) \
+         abort ();                            \
+     }                                        \
+   while (0)
+#define gl_thread_join(THREAD, RETVAL)     \
+   do                                      \
+     {                                     \
+       if (glthread_join (THREAD, RETVAL)) \
+         abort ();                         \
+     }                                     \
+   while (0)
+#define gl_thread_atfork(PREPARE, PARENT, CHILD)     \
+   do                                                \
+     {                                               \
+       if (glthread_atfork (PREPARE, PARENT, CHILD)) \
+         abort ();                                   \
+     }                                               \
+   while (0)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _GLTHREAD_THREAD_H */
diff --git a/src/grep/gnulib-tests/gnulib.mk b/src/grep/gnulib-tests/gnulib.mk
new file mode 100644
index 0000000..b8d39ae
--- /dev/null
+++ b/src/grep/gnulib-tests/gnulib.mk
@@ -0,0 +1,2415 @@
+## DO NOT EDIT! GENERATED AUTOMATICALLY!
+## Process this file with automake to produce Makefile.in.
+# Copyright (C) 2002-2021 Free Software Foundation, Inc.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This file is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this file.  If not, see <https://www.gnu.org/licenses/>.
+#
+# As a special exception to the GNU General Public License,
+# this file may be distributed as part of a program that
+# contains a configuration script generated by Autoconf, under
+# the same distribution terms as the rest of that program.
+#
+# Generated by gnulib-tool.
+
+AUTOMAKE_OPTIONS = 1.11 foreign subdir-objects
+
+SUBDIRS = .
+TESTS =
+XFAIL_TESTS =
+TESTS_ENVIRONMENT =
+noinst_PROGRAMS =
+check_PROGRAMS =
+EXTRA_PROGRAMS =
+noinst_HEADERS =
+noinst_LIBRARIES =
+check_LIBRARIES = libtests.a
+EXTRA_DIST =
+BUILT_SOURCES =
+SUFFIXES =
+MOSTLYCLEANFILES = core *.stackdump
+MOSTLYCLEANDIRS =
+CLEANFILES =
+DISTCLEANFILES =
+MAINTAINERCLEANFILES =
+
+CFLAGS = @GL_CFLAG_ALLOW_WARNINGS@ @CFLAGS@
+CXXFLAGS = @GL_CXXFLAG_ALLOW_WARNINGS@ @CXXFLAGS@
+
+AM_CPPFLAGS = \
+  -D@gltests_WITNESS@=1 \
+  -I. -I$(srcdir) \
+  -I.. -I$(srcdir)/.. \
+  -I../lib -I$(srcdir)/../lib
+
+LDADD = libtests.a ../lib/libgreputils.a libtests.a ../lib/libgreputils.a libtests.a $(LIBTESTS_LIBDEPS)
+
+libtests_a_SOURCES =
+libtests_a_LIBADD = $(gltests_LIBOBJS)
+libtests_a_DEPENDENCIES = $(gltests_LIBOBJS)
+EXTRA_libtests_a_SOURCES =
+AM_LIBTOOLFLAGS = --preserve-dup-deps
+
+TESTS_ENVIRONMENT += EXEEXT='@EXEEXT@' srcdir='$(srcdir)'
+
+## begin gnulib module accept
+
+
+EXTRA_DIST += accept.c w32sock.h
+
+EXTRA_libtests_a_SOURCES += accept.c
+
+## end   gnulib module accept
+
+## begin gnulib module accept-tests
+
+TESTS += test-accept
+check_PROGRAMS += test-accept
+test_accept_LDADD = $(LDADD) @LIBSOCKET@
+EXTRA_DIST += test-accept.c signature.h macros.h
+
+## end   gnulib module accept-tests
+
+## begin gnulib module alignof-tests
+
+TESTS += test-alignof
+check_PROGRAMS += test-alignof
+
+EXTRA_DIST += test-alignof.c
+
+## end   gnulib module alignof-tests
+
+## begin gnulib module alloca-opt-tests
+
+TESTS += test-alloca-opt
+check_PROGRAMS += test-alloca-opt
+
+EXTRA_DIST += test-alloca-opt.c
+
+## end   gnulib module alloca-opt-tests
+
+## begin gnulib module argmatch-tests
+
+TESTS += test-argmatch
+check_PROGRAMS += test-argmatch
+test_argmatch_LDADD = $(LDADD) @LIBINTL@ $(LIB_MBRTOWC)
+
+EXTRA_DIST += test-argmatch.c macros.h
+
+## end   gnulib module argmatch-tests
+
+## begin gnulib module arpa_inet
+
+BUILT_SOURCES += arpa/inet.h
+
+# We need the following in order to create <arpa/inet.h> when the system
+# doesn't have one.
+arpa/inet.h: arpa_inet.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H) $(ARG_NONNULL_H)
+	$(AM_V_at)$(MKDIR_P) arpa
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''HAVE_FEATURES_H''@|$(HAVE_FEATURES_H)|g' \
+	      -e 's|@''NEXT_ARPA_INET_H''@|$(NEXT_ARPA_INET_H)|g' \
+	      -e 's|@''HAVE_ARPA_INET_H''@|$(HAVE_ARPA_INET_H)|g' \
+	      -e 's/@''GNULIB_INET_NTOP''@/$(GL_GNULIB_INET_NTOP)/g' \
+	      -e 's/@''GNULIB_INET_PTON''@/$(GL_GNULIB_INET_PTON)/g' \
+	      -e 's|@''HAVE_WS2TCPIP_H''@|$(HAVE_WS2TCPIP_H)|g' \
+	      -e 's|@''HAVE_DECL_INET_NTOP''@|$(HAVE_DECL_INET_NTOP)|g' \
+	      -e 's|@''HAVE_DECL_INET_PTON''@|$(HAVE_DECL_INET_PTON)|g' \
+	      -e 's|@''REPLACE_INET_NTOP''@|$(REPLACE_INET_NTOP)|g' \
+	      -e 's|@''REPLACE_INET_PTON''@|$(REPLACE_INET_PTON)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/arpa_inet.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += arpa/inet.h arpa/inet.h-t
+MOSTLYCLEANDIRS += arpa
+
+EXTRA_DIST += arpa_inet.in.h
+
+## end   gnulib module arpa_inet
+
+## begin gnulib module arpa_inet-tests
+
+TESTS += test-arpa_inet
+check_PROGRAMS += test-arpa_inet
+EXTRA_DIST += test-arpa_inet.c
+
+## end   gnulib module arpa_inet-tests
+
+## begin gnulib module binary-io-tests
+
+TESTS += test-binary-io.sh
+check_PROGRAMS += test-binary-io
+
+EXTRA_DIST += test-binary-io.sh test-binary-io.c macros.h
+
+## end   gnulib module binary-io-tests
+
+## begin gnulib module bind
+
+
+EXTRA_DIST += bind.c w32sock.h
+
+EXTRA_libtests_a_SOURCES += bind.c
+
+## end   gnulib module bind
+
+## begin gnulib module bind-tests
+
+TESTS += test-bind
+check_PROGRAMS += test-bind
+test_bind_LDADD = $(LDADD) @LIBSOCKET@ $(INET_PTON_LIB)
+EXTRA_DIST += test-bind.c signature.h macros.h
+
+## end   gnulib module bind-tests
+
+## begin gnulib module bitrotate-tests
+
+TESTS += test-bitrotate
+check_PROGRAMS += test-bitrotate
+EXTRA_DIST += test-bitrotate.c macros.h
+
+## end   gnulib module bitrotate-tests
+
+## begin gnulib module btowc-tests
+
+TESTS += test-btowc1.sh test-btowc2.sh
+TESTS_ENVIRONMENT += LOCALE_FR='@LOCALE_FR@' LOCALE_FR_UTF8='@LOCALE_FR_UTF8@'
+check_PROGRAMS += test-btowc
+test_btowc_LDADD = $(LDADD) $(LIB_SETLOCALE)
+EXTRA_DIST += test-btowc1.sh test-btowc2.sh test-btowc.c signature.h macros.h
+
+## end   gnulib module btowc-tests
+
+## begin gnulib module c-ctype-tests
+
+TESTS += test-c-ctype
+check_PROGRAMS += test-c-ctype
+test_c_ctype_LDADD = $(LDADD) $(LIB_SETLOCALE)
+EXTRA_DIST += test-c-ctype.c macros.h
+
+## end   gnulib module c-ctype-tests
+
+## begin gnulib module c-stack-tests
+
+TESTS += test-c-stack.sh test-c-stack2.sh
+TESTS_ENVIRONMENT += LIBSIGSEGV='@LIBSIGSEGV@'
+check_PROGRAMS += test-c-stack
+test_c_stack_LDADD = $(LDADD) $(LIBCSTACK) @LIBINTL@
+MOSTLYCLEANFILES += t-c-stack.tmp t-c-stack2.tmp
+EXTRA_DIST += test-c-stack.c test-c-stack.sh test-c-stack2.sh macros.h
+
+## end   gnulib module c-stack-tests
+
+## begin gnulib module c-strcase-tests
+
+TESTS += test-c-strcase.sh
+TESTS_ENVIRONMENT += LOCALE_FR='@LOCALE_FR@' LOCALE_TR_UTF8='@LOCALE_TR_UTF8@'
+check_PROGRAMS += test-c-strcasecmp test-c-strncasecmp
+test_c_strcasecmp_LDADD = $(LDADD) $(LIB_SETLOCALE)
+test_c_strncasecmp_LDADD = $(LDADD) $(LIB_SETLOCALE)
+EXTRA_DIST += test-c-strcase.sh test-c-strcasecmp.c test-c-strncasecmp.c macros.h
+
+## end   gnulib module c-strcase-tests
+
+## begin gnulib module calloc-gnu-tests
+
+TESTS += test-calloc-gnu
+check_PROGRAMS += test-calloc-gnu
+EXTRA_DIST += test-calloc-gnu.c macros.h
+
+## end   gnulib module calloc-gnu-tests
+
+## begin gnulib module chdir-tests
+
+TESTS += test-chdir
+check_PROGRAMS += test-chdir
+EXTRA_DIST += test-chdir.c signature.h macros.h
+
+## end   gnulib module chdir-tests
+
+## begin gnulib module cloexec-tests
+
+TESTS += test-cloexec
+check_PROGRAMS += test-cloexec
+EXTRA_DIST += test-cloexec.c macros.h
+
+## end   gnulib module cloexec-tests
+
+## begin gnulib module close-tests
+
+TESTS += test-close
+check_PROGRAMS += test-close
+EXTRA_DIST += test-close.c signature.h macros.h
+
+## end   gnulib module close-tests
+
+## begin gnulib module connect
+
+
+EXTRA_DIST += connect.c w32sock.h
+
+EXTRA_libtests_a_SOURCES += connect.c
+
+## end   gnulib module connect
+
+## begin gnulib module connect-tests
+
+TESTS += test-connect
+check_PROGRAMS += test-connect
+test_connect_LDADD = $(LDADD) @LIBSOCKET@ $(INET_PTON_LIB)
+EXTRA_DIST += test-connect.c signature.h macros.h
+
+## end   gnulib module connect-tests
+
+## begin gnulib module ctype-tests
+
+TESTS += test-ctype
+check_PROGRAMS += test-ctype
+EXTRA_DIST += test-ctype.c
+
+## end   gnulib module ctype-tests
+
+## begin gnulib module dfa-tests
+
+TESTS += \
+  test-dfa-invalid-char-class.sh \
+  test-dfa-invalid-merge.sh \
+  test-dfa-match.sh
+
+check_PROGRAMS += test-dfa-match-aux
+test_dfa_match_aux_LDADD = $(LDADD) $(LIB_SETLOCALE) @LIBINTL@ $(LIB_MBRTOWC)
+EXTRA_DIST += test-dfa-match.sh test-dfa-match-aux.c test-dfa-invalid-char-class.sh test-dfa-invalid-merge.sh
+
+## end   gnulib module dfa-tests
+
+## begin gnulib module dirent-tests
+
+TESTS += test-dirent
+check_PROGRAMS += test-dirent
+EXTRA_DIST += test-dirent.c
+
+## end   gnulib module dirent-tests
+
+## begin gnulib module dup-tests
+
+TESTS += test-dup
+check_PROGRAMS += test-dup
+EXTRA_DIST += test-dup.c signature.h macros.h
+
+## end   gnulib module dup-tests
+
+## begin gnulib module dup2-tests
+
+TESTS += test-dup2
+check_PROGRAMS += test-dup2
+EXTRA_DIST += test-dup2.c signature.h macros.h
+
+## end   gnulib module dup2-tests
+
+## begin gnulib module dynarray-tests
+
+TESTS += test-dynarray
+check_PROGRAMS += test-dynarray
+EXTRA_DIST += test-dynarray.c macros.h
+
+## end   gnulib module dynarray-tests
+
+## begin gnulib module environ-tests
+
+TESTS += test-environ
+check_PROGRAMS += test-environ
+
+EXTRA_DIST += test-environ.c
+
+## end   gnulib module environ-tests
+
+## begin gnulib module errno-tests
+
+TESTS += test-errno
+check_PROGRAMS += test-errno
+
+EXTRA_DIST += test-errno.c
+
+## end   gnulib module errno-tests
+
+## begin gnulib module exclude-tests
+
+TESTS += \
+ test-exclude1.sh\
+ test-exclude2.sh\
+ test-exclude3.sh\
+ test-exclude4.sh\
+ test-exclude5.sh\
+ test-exclude6.sh\
+ test-exclude7.sh\
+ test-exclude8.sh
+
+check_PROGRAMS += test-exclude
+test_exclude_LDADD = $(LDADD) $(LIBUNISTRING) @LIBINTL@ $(LIB_MBRTOWC) $(LIBTHREAD)
+EXTRA_DIST += test-exclude.c test-exclude1.sh test-exclude2.sh test-exclude3.sh test-exclude4.sh test-exclude5.sh test-exclude6.sh test-exclude7.sh test-exclude8.sh
+
+## end   gnulib module exclude-tests
+
+## begin gnulib module fchdir-tests
+
+TESTS += test-fchdir
+check_PROGRAMS += test-fchdir
+test_fchdir_LDADD = $(LDADD) $(LIBINTL)
+EXTRA_DIST += test-fchdir.c signature.h macros.h
+
+## end   gnulib module fchdir-tests
+
+## begin gnulib module fcntl-h-tests
+
+TESTS += test-fcntl-h
+check_PROGRAMS += test-fcntl-h
+EXTRA_DIST += test-fcntl-h.c
+
+## end   gnulib module fcntl-h-tests
+
+## begin gnulib module fcntl-safer-tests
+
+TESTS += test-fcntl-safer
+check_PROGRAMS += test-fcntl-safer
+EXTRA_DIST += test-open.h test-fcntl-safer.c macros.h
+
+## end   gnulib module fcntl-safer-tests
+
+## begin gnulib module fcntl-tests
+
+TESTS += test-fcntl
+check_PROGRAMS += test-fcntl
+EXTRA_DIST += test-fcntl.c signature.h macros.h
+
+## end   gnulib module fcntl-tests
+
+## begin gnulib module fdopen
+
+
+EXTRA_DIST += fdopen.c
+
+EXTRA_libtests_a_SOURCES += fdopen.c
+
+## end   gnulib module fdopen
+
+## begin gnulib module fdopen-tests
+
+TESTS += test-fdopen
+check_PROGRAMS += test-fdopen
+EXTRA_DIST += test-fdopen.c signature.h macros.h
+
+## end   gnulib module fdopen-tests
+
+## begin gnulib module fdopendir-tests
+
+TESTS += test-fdopendir
+check_PROGRAMS += test-fdopendir
+test_fdopendir_LDADD = $(LDADD) @LIBINTL@
+EXTRA_DIST += test-fdopendir.c signature.h macros.h
+
+## end   gnulib module fdopendir-tests
+
+## begin gnulib module fgetc-tests
+
+TESTS += test-fgetc
+check_PROGRAMS += test-fgetc
+EXTRA_DIST += test-fgetc.c signature.h macros.h
+
+## end   gnulib module fgetc-tests
+
+## begin gnulib module float
+
+BUILT_SOURCES += $(FLOAT_H)
+
+# We need the following in order to create <float.h> when the system
+# doesn't have one that works with the given compiler.
+if GL_GENERATE_FLOAT_H
+float.h: float.in.h $(top_builddir)/config.status
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_FLOAT_H''@|$(NEXT_FLOAT_H)|g' \
+	      -e 's|@''REPLACE_ITOLD''@|$(REPLACE_ITOLD)|g' \
+	      < $(srcdir)/float.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+else
+float.h: $(top_builddir)/config.status
+	rm -f $@
+endif
+MOSTLYCLEANFILES += float.h float.h-t
+
+EXTRA_DIST += float.c float.in.h itold.c
+
+EXTRA_libtests_a_SOURCES += float.c itold.c
+
+## end   gnulib module float
+
+## begin gnulib module float-tests
+
+TESTS += test-float
+check_PROGRAMS += test-float
+EXTRA_DIST += test-float.c macros.h
+
+## end   gnulib module float-tests
+
+## begin gnulib module fnmatch-h-tests
+
+TESTS += test-fnmatch-h
+check_PROGRAMS += test-fnmatch-h
+EXTRA_DIST += test-fnmatch-h.c
+
+## end   gnulib module fnmatch-h-tests
+
+## begin gnulib module fnmatch-tests
+
+TESTS += test-fnmatch
+check_PROGRAMS += test-fnmatch
+test_fnmatch_LDADD = $(LDADD) $(LIB_MBRTOWC)
+EXTRA_DIST += test-fnmatch.c signature.h macros.h
+
+## end   gnulib module fnmatch-tests
+
+## begin gnulib module fopen-gnu-tests
+
+TESTS += test-fopen-gnu
+check_PROGRAMS += test-fopen-gnu
+EXTRA_DIST += test-fopen-gnu.c macros.h
+
+## end   gnulib module fopen-gnu-tests
+
+## begin gnulib module fopen-tests
+
+TESTS += test-fopen
+check_PROGRAMS += test-fopen
+
+EXTRA_DIST += test-fopen.h test-fopen.c signature.h macros.h
+
+## end   gnulib module fopen-tests
+
+## begin gnulib module fpending-tests
+
+TESTS += test-fpending.sh
+check_PROGRAMS += test-fpending
+MOSTLYCLEANFILES += test-fpending.t
+EXTRA_DIST += test-fpending.c test-fpending.sh macros.h
+
+## end   gnulib module fpending-tests
+
+## begin gnulib module fpucw
+
+
+EXTRA_DIST += fpucw.h
+
+## end   gnulib module fpucw
+
+## begin gnulib module fputc-tests
+
+TESTS += test-fputc
+check_PROGRAMS += test-fputc
+EXTRA_DIST += test-fputc.c signature.h macros.h
+
+## end   gnulib module fputc-tests
+
+## begin gnulib module fread-tests
+
+TESTS += test-fread
+check_PROGRAMS += test-fread
+EXTRA_DIST += test-fread.c signature.h macros.h
+
+## end   gnulib module fread-tests
+
+## begin gnulib module free-posix-tests
+
+TESTS += test-free
+check_PROGRAMS += test-free
+EXTRA_DIST += test-free.c macros.h
+
+## end   gnulib module free-posix-tests
+
+## begin gnulib module fstat-tests
+
+TESTS += test-fstat
+check_PROGRAMS += test-fstat
+EXTRA_DIST += test-fstat.c signature.h macros.h
+
+## end   gnulib module fstat-tests
+
+## begin gnulib module fstatat-tests
+
+TESTS += test-fstatat
+check_PROGRAMS += test-fstatat
+test_fstatat_LDADD = $(LDADD) @LIBINTL@
+EXTRA_DIST += test-fstatat.c test-lstat.h test-stat.h signature.h macros.h
+
+## end   gnulib module fstatat-tests
+
+## begin gnulib module ftruncate
+
+
+EXTRA_DIST += ftruncate.c
+
+EXTRA_libtests_a_SOURCES += ftruncate.c
+
+## end   gnulib module ftruncate
+
+## begin gnulib module ftruncate-tests
+
+TESTS += test-ftruncate.sh
+check_PROGRAMS += test-ftruncate
+EXTRA_DIST += test-ftruncate.c test-ftruncate.sh signature.h macros.h
+
+## end   gnulib module ftruncate-tests
+
+## begin gnulib module fwrite-tests
+
+TESTS += test-fwrite
+check_PROGRAMS += test-fwrite
+EXTRA_DIST += test-fwrite.c signature.h macros.h
+
+## end   gnulib module fwrite-tests
+
+## begin gnulib module getcwd-lgpl-tests
+
+TESTS += test-getcwd-lgpl
+check_PROGRAMS += test-getcwd-lgpl
+test_getcwd_lgpl_LDADD = $(LDADD) $(LIBINTL)
+EXTRA_DIST += test-getcwd-lgpl.c signature.h macros.h
+
+## end   gnulib module getcwd-lgpl-tests
+
+## begin gnulib module getdtablesize-tests
+
+TESTS += test-getdtablesize
+check_PROGRAMS += test-getdtablesize
+EXTRA_DIST += test-getdtablesize.c signature.h macros.h
+
+## end   gnulib module getdtablesize-tests
+
+## begin gnulib module getopt-gnu-tests
+
+TESTS += test-getopt-gnu
+check_PROGRAMS += test-getopt-gnu
+test_getopt_gnu_LDADD = $(LDADD) $(LIBINTL)
+EXTRA_DIST += macros.h signature.h test-getopt-gnu.c test-getopt-main.h test-getopt.h test-getopt_long.h
+
+## end   gnulib module getopt-gnu-tests
+
+## begin gnulib module getopt-posix-tests
+
+TESTS += test-getopt-posix
+check_PROGRAMS += test-getopt-posix
+test_getopt_posix_LDADD = $(LDADD) $(LIBINTL)
+EXTRA_DIST += macros.h signature.h test-getopt-posix.c test-getopt-main.h test-getopt.h
+
+## end   gnulib module getopt-posix-tests
+
+## begin gnulib module getprogname-tests
+
+DEFS += -DEXEEXT=\"@EXEEXT@\"
+TESTS += test-getprogname
+check_PROGRAMS += test-getprogname
+test_getprogname_LDADD = $(LDADD)
+EXTRA_DIST += test-getprogname.c
+
+## end   gnulib module getprogname-tests
+
+## begin gnulib module gettimeofday
+
+
+EXTRA_DIST += gettimeofday.c
+
+EXTRA_libtests_a_SOURCES += gettimeofday.c
+
+## end   gnulib module gettimeofday
+
+## begin gnulib module gettimeofday-tests
+
+TESTS += test-gettimeofday
+check_PROGRAMS += test-gettimeofday
+
+EXTRA_DIST += signature.h test-gettimeofday.c
+
+## end   gnulib module gettimeofday-tests
+
+## begin gnulib module gperf
+
+GPERF = gperf
+V_GPERF = $(V_GPERF_@AM_V@)
+V_GPERF_ = $(V_GPERF_@AM_DEFAULT_V@)
+V_GPERF_0 = @echo "  GPERF   " $@;
+
+## end   gnulib module gperf
+
+## begin gnulib module hard-locale-tests
+
+TESTS += test-hard-locale
+check_PROGRAMS += test-hard-locale
+test_hard_locale_LDADD = $(LDADD) $(LIB_SETLOCALE) @LIB_HARD_LOCALE@
+# We cannot call this program 'locale', because the C++ compiler on Mac OS X
+# would then barf upon '#include <locale>'. So, call it 'current-locale'.
+noinst_PROGRAMS += current-locale
+current_locale_SOURCES = locale.c
+EXTRA_DIST += test-hard-locale.c locale.c
+
+## end   gnulib module hard-locale-tests
+
+## begin gnulib module hash-pjw
+
+libtests_a_SOURCES += hash-pjw.h hash-pjw.c
+
+## end   gnulib module hash-pjw
+
+## begin gnulib module hash-tests
+
+TESTS += test-hash
+check_PROGRAMS += test-hash
+EXTRA_DIST += test-hash.c macros.h
+
+## end   gnulib module hash-tests
+
+## begin gnulib module i-ring-tests
+
+TESTS += test-i-ring
+check_PROGRAMS += test-i-ring
+EXTRA_DIST += test-i-ring.c macros.h
+
+## end   gnulib module i-ring-tests
+
+## begin gnulib module iconv-h-tests
+
+TESTS += test-iconv-h
+check_PROGRAMS += test-iconv-h
+EXTRA_DIST += test-iconv-h.c
+
+## end   gnulib module iconv-h-tests
+
+## begin gnulib module iconv-tests
+
+TESTS += test-iconv
+check_PROGRAMS += test-iconv
+test_iconv_LDADD = $(LDADD) @LIBICONV@
+
+EXTRA_DIST += test-iconv.c signature.h macros.h
+
+## end   gnulib module iconv-tests
+
+## begin gnulib module ignore-value-tests
+
+TESTS += test-ignore-value
+check_PROGRAMS += test-ignore-value
+EXTRA_DIST += test-ignore-value.c
+
+## end   gnulib module ignore-value-tests
+
+## begin gnulib module inet_pton
+
+
+EXTRA_DIST += inet_pton.c
+
+EXTRA_libtests_a_SOURCES += inet_pton.c
+
+## end   gnulib module inet_pton
+
+## begin gnulib module inet_pton-tests
+
+TESTS += test-inet_pton
+check_PROGRAMS += test-inet_pton
+test_inet_pton_LDADD = $(LDADD) @INET_PTON_LIB@
+EXTRA_DIST += test-inet_pton.c signature.h macros.h
+
+## end   gnulib module inet_pton-tests
+
+## begin gnulib module intprops-tests
+
+TESTS += test-intprops
+check_PROGRAMS += test-intprops
+EXTRA_DIST += test-intprops.c macros.h
+
+## end   gnulib module intprops-tests
+
+## begin gnulib module inttostr
+
+libtests_a_SOURCES +=    imaxtostr.c    inttostr.c    offtostr.c    uinttostr.c    umaxtostr.c
+
+EXTRA_DIST += anytostr.c inttostr.h
+
+EXTRA_libtests_a_SOURCES += anytostr.c
+
+## end   gnulib module inttostr
+
+## begin gnulib module inttostr-tests
+
+TESTS += test-inttostr
+check_PROGRAMS += test-inttostr
+EXTRA_DIST += macros.h test-inttostr.c
+
+## end   gnulib module inttostr-tests
+
+## begin gnulib module inttypes-tests
+
+TESTS += test-inttypes
+check_PROGRAMS += test-inttypes
+EXTRA_DIST += test-inttypes.c
+
+## end   gnulib module inttypes-tests
+
+## begin gnulib module ioctl
+
+
+EXTRA_DIST += ioctl.c w32sock.h
+
+EXTRA_libtests_a_SOURCES += ioctl.c
+
+## end   gnulib module ioctl
+
+## begin gnulib module ioctl-tests
+
+TESTS += test-ioctl
+check_PROGRAMS += test-ioctl
+EXTRA_DIST += test-ioctl.c signature.h macros.h
+
+## end   gnulib module ioctl-tests
+
+## begin gnulib module isatty-tests
+
+TESTS += test-isatty
+check_PROGRAMS += test-isatty
+EXTRA_DIST += test-isatty.c signature.h macros.h
+
+## end   gnulib module isatty-tests
+
+## begin gnulib module isblank-tests
+
+TESTS += test-isblank
+check_PROGRAMS += test-isblank
+EXTRA_DIST += test-isblank.c signature.h macros.h
+
+## end   gnulib module isblank-tests
+
+## begin gnulib module iswblank-tests
+
+TESTS += test-iswblank
+check_PROGRAMS += test-iswblank
+EXTRA_DIST += test-iswblank.c macros.h
+
+## end   gnulib module iswblank-tests
+
+## begin gnulib module iswdigit-tests
+
+TESTS += test-iswdigit.sh
+TESTS_ENVIRONMENT += \
+  LOCALE_FR='@LOCALE_FR@' \
+  LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' \
+  LOCALE_JA='@LOCALE_JA@' \
+  LOCALE_ZH_CN='@LOCALE_ZH_CN@'
+check_PROGRAMS += test-iswdigit
+test_iswdigit_LDADD = $(LDADD) $(LIB_SETLOCALE) $(LIB_MBRTOWC)
+EXTRA_DIST += test-iswdigit.sh test-iswdigit.c signature.h macros.h
+
+## end   gnulib module iswdigit-tests
+
+## begin gnulib module iswxdigit-tests
+
+TESTS += test-iswxdigit.sh
+TESTS_ENVIRONMENT += \
+  LOCALE_FR='@LOCALE_FR@' \
+  LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' \
+  LOCALE_JA='@LOCALE_JA@' \
+  LOCALE_ZH_CN='@LOCALE_ZH_CN@'
+check_PROGRAMS += test-iswxdigit
+test_iswxdigit_LDADD = $(LDADD) $(LIB_SETLOCALE) $(LIB_MBRTOWC)
+EXTRA_DIST += test-iswxdigit.sh test-iswxdigit.c signature.h macros.h
+
+## end   gnulib module iswxdigit-tests
+
+## begin gnulib module langinfo-tests
+
+TESTS += test-langinfo
+check_PROGRAMS += test-langinfo
+EXTRA_DIST += test-langinfo.c
+
+## end   gnulib module langinfo-tests
+
+## begin gnulib module limits-h-tests
+
+TESTS += test-limits-h
+check_PROGRAMS += test-limits-h
+EXTRA_DIST += test-limits-h.c
+
+## end   gnulib module limits-h-tests
+
+## begin gnulib module listen
+
+
+EXTRA_DIST += listen.c w32sock.h
+
+EXTRA_libtests_a_SOURCES += listen.c
+
+## end   gnulib module listen
+
+## begin gnulib module listen-tests
+
+TESTS += test-listen
+check_PROGRAMS += test-listen
+test_listen_LDADD = $(LDADD) @LIBSOCKET@
+EXTRA_DIST += test-listen.c signature.h macros.h
+
+## end   gnulib module listen-tests
+
+## begin gnulib module localcharset-tests
+
+noinst_PROGRAMS += test-localcharset
+test_localcharset_LDADD = $(LDADD) $(LIB_SETLOCALE)
+EXTRA_DIST += test-localcharset.c
+
+## end   gnulib module localcharset-tests
+
+## begin gnulib module locale-tests
+
+TESTS += test-locale
+check_PROGRAMS += test-locale
+EXTRA_DIST += test-locale.c
+
+## end   gnulib module locale-tests
+
+## begin gnulib module localeconv-tests
+
+TESTS += test-localeconv
+check_PROGRAMS += test-localeconv
+EXTRA_DIST += test-localeconv.c signature.h macros.h
+
+## end   gnulib module localeconv-tests
+
+## begin gnulib module localename
+
+libtests_a_SOURCES += localename.c localename-table.c
+
+EXTRA_DIST += localename-table.h localename.h
+
+## end   gnulib module localename
+
+## begin gnulib module localename-tests
+
+TESTS += test-localename
+check_PROGRAMS += test-localename
+test_localename_LDADD = $(LDADD) $(LIB_SETLOCALE) @INTL_MACOSX_LIBS@ $(LIBTHREAD)
+
+EXTRA_DIST += test-localename.c macros.h
+
+## end   gnulib module localename-tests
+
+## begin gnulib module lseek-tests
+
+TESTS += test-lseek.sh
+check_PROGRAMS += test-lseek
+EXTRA_DIST += test-lseek.c test-lseek.sh signature.h macros.h
+
+## end   gnulib module lseek-tests
+
+## begin gnulib module lstat-tests
+
+TESTS += test-lstat
+check_PROGRAMS += test-lstat
+EXTRA_DIST += test-lstat.h test-lstat.c signature.h macros.h
+
+## end   gnulib module lstat-tests
+
+## begin gnulib module malloc-gnu-tests
+
+TESTS += test-malloc-gnu
+check_PROGRAMS += test-malloc-gnu
+EXTRA_DIST += test-malloc-gnu.c macros.h
+
+## end   gnulib module malloc-gnu-tests
+
+## begin gnulib module malloca-tests
+
+TESTS += test-malloca
+check_PROGRAMS += test-malloca
+
+EXTRA_DIST += test-malloca.c
+
+## end   gnulib module malloca-tests
+
+## begin gnulib module mbscasecmp-tests
+
+TESTS += test-mbscasecmp.sh
+TESTS_ENVIRONMENT += LOCALE_TR_UTF8='@LOCALE_TR_UTF8@'
+check_PROGRAMS += test-mbscasecmp
+test_mbscasecmp_LDADD = $(LDADD) $(LIBUNISTRING) $(LIB_SETLOCALE) $(LIB_MBRTOWC)
+EXTRA_DIST += test-mbscasecmp.sh test-mbscasecmp.c macros.h
+
+## end   gnulib module mbscasecmp-tests
+
+## begin gnulib module mbsinit-tests
+
+TESTS += test-mbsinit.sh
+TESTS_ENVIRONMENT += LOCALE_FR_UTF8='@LOCALE_FR_UTF8@'
+check_PROGRAMS += test-mbsinit
+test_mbsinit_LDADD = $(LDADD) $(LIB_SETLOCALE) $(LIB_MBRTOWC)
+EXTRA_DIST += test-mbsinit.sh test-mbsinit.c signature.h macros.h
+
+## end   gnulib module mbsinit-tests
+
+## begin gnulib module mbsrtowcs-tests
+
+TESTS += test-mbsrtowcs1.sh test-mbsrtowcs2.sh test-mbsrtowcs3.sh test-mbsrtowcs4.sh
+TESTS_ENVIRONMENT += \
+  LOCALE_FR='@LOCALE_FR@' \
+  LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' \
+  LOCALE_JA='@LOCALE_JA@' \
+  LOCALE_ZH_CN='@LOCALE_ZH_CN@'
+check_PROGRAMS += test-mbsrtowcs
+test_mbsrtowcs_LDADD = $(LDADD) $(LIB_SETLOCALE) $(LIB_MBRTOWC)
+EXTRA_DIST += test-mbsrtowcs1.sh test-mbsrtowcs2.sh test-mbsrtowcs3.sh test-mbsrtowcs4.sh test-mbsrtowcs.c signature.h macros.h
+
+## end   gnulib module mbsrtowcs-tests
+
+## begin gnulib module mbsstr-tests
+
+TESTS += test-mbsstr1 test-mbsstr2.sh test-mbsstr3.sh
+TESTS_ENVIRONMENT += LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' LOCALE_ZH_CN='@LOCALE_ZH_CN@'
+check_PROGRAMS += test-mbsstr1 test-mbsstr2 test-mbsstr3
+test_mbsstr1_LDADD = $(LDADD) $(LIBUNISTRING) $(LIB_MBRTOWC)
+test_mbsstr2_LDADD = $(LDADD) $(LIBUNISTRING) $(LIB_SETLOCALE) $(LIB_MBRTOWC)
+test_mbsstr3_LDADD = $(LDADD) $(LIBUNISTRING) $(LIB_SETLOCALE) $(LIB_MBRTOWC)
+EXTRA_DIST += test-mbsstr1.c test-mbsstr2.sh test-mbsstr2.c test-mbsstr3.sh test-mbsstr3.c macros.h
+
+## end   gnulib module mbsstr-tests
+
+## begin gnulib module memchr-tests
+
+TESTS += test-memchr
+check_PROGRAMS += test-memchr
+EXTRA_DIST += test-memchr.c zerosize-ptr.h signature.h macros.h
+
+## end   gnulib module memchr-tests
+
+## begin gnulib module memchr2-tests
+
+TESTS += test-memchr2
+check_PROGRAMS += test-memchr2
+EXTRA_DIST += test-memchr2.c zerosize-ptr.h macros.h
+
+## end   gnulib module memchr2-tests
+
+## begin gnulib module memrchr-tests
+
+TESTS += test-memrchr
+check_PROGRAMS += test-memrchr
+EXTRA_DIST += test-memrchr.c zerosize-ptr.h signature.h macros.h
+
+## end   gnulib module memrchr-tests
+
+## begin gnulib module nanosleep
+
+
+EXTRA_DIST += nanosleep.c
+
+EXTRA_libtests_a_SOURCES += nanosleep.c
+
+## end   gnulib module nanosleep
+
+## begin gnulib module nanosleep-tests
+
+TESTS += test-nanosleep
+check_PROGRAMS += test-nanosleep
+test_nanosleep_LDADD = $(LDADD) $(LIB_NANOSLEEP)
+EXTRA_DIST += test-nanosleep.c signature.h macros.h
+
+## end   gnulib module nanosleep-tests
+
+## begin gnulib module netinet_in
+
+BUILT_SOURCES += $(NETINET_IN_H)
+
+# We need the following in order to create <netinet/in.h> when the system
+# doesn't have one.
+if GL_GENERATE_NETINET_IN_H
+netinet/in.h: netinet_in.in.h $(top_builddir)/config.status
+	$(AM_V_at)$(MKDIR_P) netinet
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_NETINET_IN_H''@|$(NEXT_NETINET_IN_H)|g' \
+	      -e 's|@''HAVE_NETINET_IN_H''@|$(HAVE_NETINET_IN_H)|g' \
+	      < $(srcdir)/netinet_in.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+else
+netinet/in.h: $(top_builddir)/config.status
+	rm -f $@
+endif
+MOSTLYCLEANFILES += netinet/in.h netinet/in.h-t
+MOSTLYCLEANDIRS += netinet
+
+EXTRA_DIST += netinet_in.in.h
+
+## end   gnulib module netinet_in
+
+## begin gnulib module netinet_in-tests
+
+TESTS += test-netinet_in
+check_PROGRAMS += test-netinet_in
+EXTRA_DIST += test-netinet_in.c
+
+## end   gnulib module netinet_in-tests
+
+## begin gnulib module nl_langinfo-tests
+
+TESTS += test-nl_langinfo.sh test-nl_langinfo-mt
+TESTS_ENVIRONMENT += LOCALE_FR='@LOCALE_FR@' LOCALE_FR_UTF8='@LOCALE_FR_UTF8@'
+check_PROGRAMS += test-nl_langinfo test-nl_langinfo-mt
+test_nl_langinfo_LDADD = $(LDADD) $(LIB_SETLOCALE)
+test_nl_langinfo_mt_LDADD = $(LDADD) $(LIB_SETLOCALE) $(LIBMULTITHREAD) $(LIB_NANOSLEEP)
+EXTRA_DIST += test-nl_langinfo.sh test-nl_langinfo.c test-nl_langinfo-mt.c signature.h macros.h
+
+## end   gnulib module nl_langinfo-tests
+
+## begin gnulib module open-tests
+
+TESTS += test-open
+check_PROGRAMS += test-open
+EXTRA_DIST += test-open.h test-open.c signature.h macros.h
+
+## end   gnulib module open-tests
+
+## begin gnulib module openat-safer-tests
+
+TESTS += test-openat-safer
+check_PROGRAMS += test-openat-safer
+test_openat_safer_LDADD = $(LDADD) @LIBINTL@
+EXTRA_DIST += test-openat-safer.c macros.h
+
+## end   gnulib module openat-safer-tests
+
+## begin gnulib module openat-tests
+
+TESTS += test-openat
+check_PROGRAMS += test-openat
+test_openat_LDADD = $(LDADD) @LIBINTL@
+EXTRA_DIST += test-openat.c test-open.h signature.h macros.h
+
+## end   gnulib module openat-tests
+
+## begin gnulib module pathmax-tests
+
+TESTS += test-pathmax
+check_PROGRAMS += test-pathmax
+EXTRA_DIST += test-pathmax.c
+
+## end   gnulib module pathmax-tests
+
+## begin gnulib module perror
+
+
+EXTRA_DIST += perror.c
+
+EXTRA_libtests_a_SOURCES += perror.c
+
+## end   gnulib module perror
+
+## begin gnulib module perror-tests
+
+TESTS += test-perror.sh test-perror2
+check_PROGRAMS += test-perror test-perror2
+EXTRA_DIST += macros.h signature.h test-perror.c test-perror2.c test-perror.sh
+
+## end   gnulib module perror-tests
+
+## begin gnulib module pipe-posix-tests
+
+TESTS += test-pipe
+check_PROGRAMS += test-pipe
+EXTRA_DIST += test-pipe.c signature.h macros.h
+
+## end   gnulib module pipe-posix-tests
+
+## begin gnulib module pthread-h
+
+BUILT_SOURCES += pthread.h
+
+# We need the following in order to create <pthread.h> when the system
+# doesn't have one that works with the given compiler.
+pthread.h: pthread.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(_NORETURN_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''HAVE_PTHREAD_H''@|$(HAVE_PTHREAD_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_PTHREAD_H''@|$(NEXT_PTHREAD_H)|g' \
+	      -e 's/@''GNULIB_PTHREAD_THREAD''@/$(GL_GNULIB_PTHREAD_THREAD)/g' \
+	      -e 's/@''GNULIB_PTHREAD_ONCE''@/$(GL_GNULIB_PTHREAD_ONCE)/g' \
+	      -e 's/@''GNULIB_PTHREAD_MUTEX''@/$(GL_GNULIB_PTHREAD_MUTEX)/g' \
+	      -e 's/@''GNULIB_PTHREAD_RWLOCK''@/$(GL_GNULIB_PTHREAD_RWLOCK)/g' \
+	      -e 's/@''GNULIB_PTHREAD_COND''@/$(GL_GNULIB_PTHREAD_COND)/g' \
+	      -e 's/@''GNULIB_PTHREAD_TSS''@/$(GL_GNULIB_PTHREAD_TSS)/g' \
+	      -e 's/@''GNULIB_PTHREAD_SPIN''@/$(GL_GNULIB_PTHREAD_SPIN)/g' \
+	      -e 's/@''GNULIB_PTHREAD_MUTEX_TIMEDLOCK''@/$(GL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK)/g' \
+	      -e 's|@''HAVE_PTHREAD_T''@|$(HAVE_PTHREAD_T)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPINLOCK_T''@|$(HAVE_PTHREAD_SPINLOCK_T)|g' \
+	      -e 's|@''HAVE_PTHREAD_CREATE_DETACHED''@|$(HAVE_PTHREAD_CREATE_DETACHED)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_RECURSIVE''@|$(HAVE_PTHREAD_MUTEX_RECURSIVE)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_ROBUST''@|$(HAVE_PTHREAD_MUTEX_ROBUST)|g' \
+	      -e 's|@''HAVE_PTHREAD_PROCESS_SHARED''@|$(HAVE_PTHREAD_PROCESS_SHARED)|g' \
+	      -e 's|@''HAVE_PTHREAD_CREATE''@|$(HAVE_PTHREAD_CREATE)|g' \
+	      -e 's|@''HAVE_PTHREAD_ATTR_INIT''@|$(HAVE_PTHREAD_ATTR_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_ATTR_GETDETACHSTATE''@|$(HAVE_PTHREAD_ATTR_GETDETACHSTATE)|g' \
+	      -e 's|@''HAVE_PTHREAD_ATTR_SETDETACHSTATE''@|$(HAVE_PTHREAD_ATTR_SETDETACHSTATE)|g' \
+	      -e 's|@''HAVE_PTHREAD_ATTR_DESTROY''@|$(HAVE_PTHREAD_ATTR_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_SELF''@|$(HAVE_PTHREAD_SELF)|g' \
+	      -e 's|@''HAVE_PTHREAD_EQUAL''@|$(HAVE_PTHREAD_EQUAL)|g' \
+	      -e 's|@''HAVE_PTHREAD_DETACH''@|$(HAVE_PTHREAD_DETACH)|g' \
+	      -e 's|@''HAVE_PTHREAD_JOIN''@|$(HAVE_PTHREAD_JOIN)|g' \
+	      -e 's|@''HAVE_PTHREAD_EXIT''@|$(HAVE_PTHREAD_EXIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_ONCE''@|$(HAVE_PTHREAD_ONCE)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_INIT''@|$(HAVE_PTHREAD_MUTEX_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_INIT''@|$(HAVE_PTHREAD_MUTEXATTR_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_GETTYPE''@|$(HAVE_PTHREAD_MUTEXATTR_GETTYPE)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_SETTYPE''@|$(HAVE_PTHREAD_MUTEXATTR_SETTYPE)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_GETROBUST''@|$(HAVE_PTHREAD_MUTEXATTR_GETROBUST)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_SETROBUST''@|$(HAVE_PTHREAD_MUTEXATTR_SETROBUST)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_DESTROY''@|$(HAVE_PTHREAD_MUTEXATTR_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_LOCK''@|$(HAVE_PTHREAD_MUTEX_LOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_TRYLOCK''@|$(HAVE_PTHREAD_MUTEX_TRYLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_TIMEDLOCK''@|$(HAVE_PTHREAD_MUTEX_TIMEDLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_UNLOCK''@|$(HAVE_PTHREAD_MUTEX_UNLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_DESTROY''@|$(HAVE_PTHREAD_MUTEX_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_INIT''@|$(HAVE_PTHREAD_RWLOCK_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCKATTR_INIT''@|$(HAVE_PTHREAD_RWLOCKATTR_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCKATTR_DESTROY''@|$(HAVE_PTHREAD_RWLOCKATTR_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_RDLOCK''@|$(HAVE_PTHREAD_RWLOCK_RDLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_WRLOCK''@|$(HAVE_PTHREAD_RWLOCK_WRLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_TRYRDLOCK''@|$(HAVE_PTHREAD_RWLOCK_TRYRDLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_TRYWRLOCK''@|$(HAVE_PTHREAD_RWLOCK_TRYWRLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK''@|$(HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK''@|$(HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_UNLOCK''@|$(HAVE_PTHREAD_RWLOCK_UNLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_DESTROY''@|$(HAVE_PTHREAD_RWLOCK_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_INIT''@|$(HAVE_PTHREAD_COND_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_CONDATTR_INIT''@|$(HAVE_PTHREAD_CONDATTR_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_CONDATTR_DESTROY''@|$(HAVE_PTHREAD_CONDATTR_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_WAIT''@|$(HAVE_PTHREAD_COND_WAIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_TIMEDWAIT''@|$(HAVE_PTHREAD_COND_TIMEDWAIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_SIGNAL''@|$(HAVE_PTHREAD_COND_SIGNAL)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_BROADCAST''@|$(HAVE_PTHREAD_COND_BROADCAST)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_DESTROY''@|$(HAVE_PTHREAD_COND_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_KEY_CREATE''@|$(HAVE_PTHREAD_KEY_CREATE)|g' \
+	      -e 's|@''HAVE_PTHREAD_SETSPECIFIC''@|$(HAVE_PTHREAD_SETSPECIFIC)|g' \
+	      -e 's|@''HAVE_PTHREAD_GETSPECIFIC''@|$(HAVE_PTHREAD_GETSPECIFIC)|g' \
+	      -e 's|@''HAVE_PTHREAD_KEY_DELETE''@|$(HAVE_PTHREAD_KEY_DELETE)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_INIT''@|$(HAVE_PTHREAD_SPIN_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_LOCK''@|$(HAVE_PTHREAD_SPIN_LOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_TRYLOCK''@|$(HAVE_PTHREAD_SPIN_TRYLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_UNLOCK''@|$(HAVE_PTHREAD_SPIN_UNLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_DESTROY''@|$(HAVE_PTHREAD_SPIN_DESTROY)|g' \
+	      < $(srcdir)/pthread.in.h | \
+	  sed -e 's|@''REPLACE_PTHREAD_CREATE''@|$(REPLACE_PTHREAD_CREATE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ATTR_INIT''@|$(REPLACE_PTHREAD_ATTR_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ATTR_GETDETACHSTATE''@|$(REPLACE_PTHREAD_ATTR_GETDETACHSTATE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ATTR_SETDETACHSTATE''@|$(REPLACE_PTHREAD_ATTR_SETDETACHSTATE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ATTR_DESTROY''@|$(REPLACE_PTHREAD_ATTR_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SELF''@|$(REPLACE_PTHREAD_SELF)|g' \
+	      -e 's|@''REPLACE_PTHREAD_EQUAL''@|$(REPLACE_PTHREAD_EQUAL)|g' \
+	      -e 's|@''REPLACE_PTHREAD_DETACH''@|$(REPLACE_PTHREAD_DETACH)|g' \
+	      -e 's|@''REPLACE_PTHREAD_JOIN''@|$(REPLACE_PTHREAD_JOIN)|g' \
+	      -e 's|@''REPLACE_PTHREAD_EXIT''@|$(REPLACE_PTHREAD_EXIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ONCE''@|$(REPLACE_PTHREAD_ONCE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_INIT''@|$(REPLACE_PTHREAD_MUTEX_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_INIT''@|$(REPLACE_PTHREAD_MUTEXATTR_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_GETTYPE''@|$(REPLACE_PTHREAD_MUTEXATTR_GETTYPE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_SETTYPE''@|$(REPLACE_PTHREAD_MUTEXATTR_SETTYPE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_GETROBUST''@|$(REPLACE_PTHREAD_MUTEXATTR_GETROBUST)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_SETROBUST''@|$(REPLACE_PTHREAD_MUTEXATTR_SETROBUST)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_DESTROY''@|$(REPLACE_PTHREAD_MUTEXATTR_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_LOCK''@|$(REPLACE_PTHREAD_MUTEX_LOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_TRYLOCK''@|$(REPLACE_PTHREAD_MUTEX_TRYLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_TIMEDLOCK''@|$(REPLACE_PTHREAD_MUTEX_TIMEDLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_UNLOCK''@|$(REPLACE_PTHREAD_MUTEX_UNLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_DESTROY''@|$(REPLACE_PTHREAD_MUTEX_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_INIT''@|$(REPLACE_PTHREAD_RWLOCK_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCKATTR_INIT''@|$(REPLACE_PTHREAD_RWLOCKATTR_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCKATTR_DESTROY''@|$(REPLACE_PTHREAD_RWLOCKATTR_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_RDLOCK''@|$(REPLACE_PTHREAD_RWLOCK_RDLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_WRLOCK''@|$(REPLACE_PTHREAD_RWLOCK_WRLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_TRYRDLOCK''@|$(REPLACE_PTHREAD_RWLOCK_TRYRDLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_TRYWRLOCK''@|$(REPLACE_PTHREAD_RWLOCK_TRYWRLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK''@|$(REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK''@|$(REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_UNLOCK''@|$(REPLACE_PTHREAD_RWLOCK_UNLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_DESTROY''@|$(REPLACE_PTHREAD_RWLOCK_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_INIT''@|$(REPLACE_PTHREAD_COND_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_CONDATTR_INIT''@|$(REPLACE_PTHREAD_CONDATTR_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_CONDATTR_DESTROY''@|$(REPLACE_PTHREAD_CONDATTR_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_WAIT''@|$(REPLACE_PTHREAD_COND_WAIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_TIMEDWAIT''@|$(REPLACE_PTHREAD_COND_TIMEDWAIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_SIGNAL''@|$(REPLACE_PTHREAD_COND_SIGNAL)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_BROADCAST''@|$(REPLACE_PTHREAD_COND_BROADCAST)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_DESTROY''@|$(REPLACE_PTHREAD_COND_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_KEY_CREATE''@|$(REPLACE_PTHREAD_KEY_CREATE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SETSPECIFIC''@|$(REPLACE_PTHREAD_SETSPECIFIC)|g' \
+	      -e 's|@''REPLACE_PTHREAD_GETSPECIFIC''@|$(REPLACE_PTHREAD_GETSPECIFIC)|g' \
+	      -e 's|@''REPLACE_PTHREAD_KEY_DELETE''@|$(REPLACE_PTHREAD_KEY_DELETE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_INIT''@|$(REPLACE_PTHREAD_SPIN_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_LOCK''@|$(REPLACE_PTHREAD_SPIN_LOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_TRYLOCK''@|$(REPLACE_PTHREAD_SPIN_TRYLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_UNLOCK''@|$(REPLACE_PTHREAD_SPIN_UNLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_DESTROY''@|$(REPLACE_PTHREAD_SPIN_DESTROY)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _Noreturn/r $(_NORETURN_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)'; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += pthread.h pthread.h-t
+
+EXTRA_DIST += pthread.in.h
+
+## end   gnulib module pthread-h
+
+## begin gnulib module pthread-h-tests
+
+TESTS += test-pthread
+check_PROGRAMS += test-pthread
+EXTRA_DIST += test-pthread.c
+
+## end   gnulib module pthread-h-tests
+
+## begin gnulib module pthread-thread
+
+
+EXTRA_DIST += pthread-thread.c
+
+EXTRA_libtests_a_SOURCES += pthread-thread.c
+
+## end   gnulib module pthread-thread
+
+## begin gnulib module pthread-thread-tests
+
+TESTS += test-pthread-thread
+check_PROGRAMS += test-pthread-thread
+test_pthread_thread_LDADD = $(LDADD) @LIBPMULTITHREAD@
+EXTRA_DIST += test-pthread-thread.c macros.h
+
+## end   gnulib module pthread-thread-tests
+
+## begin gnulib module pthread_sigmask
+
+
+EXTRA_DIST += pthread_sigmask.c
+
+EXTRA_libtests_a_SOURCES += pthread_sigmask.c
+
+## end   gnulib module pthread_sigmask
+
+## begin gnulib module pthread_sigmask-tests
+
+TESTS += test-pthread_sigmask1 test-pthread_sigmask2
+check_PROGRAMS += test-pthread_sigmask1 test-pthread_sigmask2
+test_pthread_sigmask1_LDADD = $(LDADD) @LIB_PTHREAD_SIGMASK@
+test_pthread_sigmask2_LDADD = $(LDADD) @LIB_PTHREAD_SIGMASK@ @LIBMULTITHREAD@
+EXTRA_DIST += test-pthread_sigmask1.c test-pthread_sigmask2.c signature.h macros.h
+
+## end   gnulib module pthread_sigmask-tests
+
+## begin gnulib module putenv
+
+
+EXTRA_DIST += putenv.c
+
+EXTRA_libtests_a_SOURCES += putenv.c
+
+## end   gnulib module putenv
+
+## begin gnulib module quotearg-simple-tests
+
+TESTS += test-quotearg-simple
+check_PROGRAMS += test-quotearg-simple
+test_quotearg_simple_LDADD = $(LDADD) @LIBINTL@ $(LIB_MBRTOWC)
+EXTRA_DIST += test-quotearg-simple.c test-quotearg.h macros.h zerosize-ptr.h
+
+## end   gnulib module quotearg-simple-tests
+
+## begin gnulib module raise-tests
+
+TESTS += test-raise
+check_PROGRAMS += test-raise
+EXTRA_DIST += test-raise.c signature.h macros.h
+
+## end   gnulib module raise-tests
+
+## begin gnulib module rawmemchr-tests
+
+TESTS += test-rawmemchr
+check_PROGRAMS += test-rawmemchr
+EXTRA_DIST += test-rawmemchr.c zerosize-ptr.h signature.h macros.h
+
+## end   gnulib module rawmemchr-tests
+
+## begin gnulib module read-tests
+
+TESTS += test-read
+check_PROGRAMS += test-read
+EXTRA_DIST += test-read.c signature.h macros.h
+
+## end   gnulib module read-tests
+
+## begin gnulib module realloc-gnu-tests
+
+TESTS += test-realloc-gnu
+check_PROGRAMS += test-realloc-gnu
+EXTRA_DIST += test-realloc-gnu.c macros.h
+
+## end   gnulib module realloc-gnu-tests
+
+## begin gnulib module reallocarray-tests
+
+TESTS += test-reallocarray
+check_PROGRAMS += test-reallocarray
+EXTRA_DIST += test-reallocarray.c signature.h macros.h
+
+## end   gnulib module reallocarray-tests
+
+## begin gnulib module regex-tests
+
+TESTS += test-regex
+check_PROGRAMS += test-regex
+test_regex_LDADD = $(LDADD) $(LIB_SETLOCALE) $(LIB_MBRTOWC) @LIBINTL@ $(LIBTHREAD)
+EXTRA_DIST += test-regex.c macros.h
+
+## end   gnulib module regex-tests
+
+## begin gnulib module sched
+
+BUILT_SOURCES += sched.h
+
+# We need the following in order to create a replacement for <sched.h> when
+# the system doesn't have one.
+sched.h: sched.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''HAVE_SCHED_H''@|$(HAVE_SCHED_H)|g' \
+	      -e 's|@''HAVE_SYS_CDEFS_H''@|$(HAVE_SYS_CDEFS_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SCHED_H''@|$(NEXT_SCHED_H)|g' \
+	      -e 's|@''HAVE_STRUCT_SCHED_PARAM''@|$(HAVE_STRUCT_SCHED_PARAM)|g' \
+	      -e 's/@''GNULIB_SCHED_YIELD''@/$(GL_GNULIB_SCHED_YIELD)/g' \
+	      -e 's|@''HAVE_SCHED_YIELD''@|$(HAVE_SCHED_YIELD)|g' \
+	      -e 's|@''REPLACE_SCHED_YIELD''@|$(REPLACE_SCHED_YIELD)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/sched.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += sched.h sched.h-t
+
+EXTRA_DIST += sched.in.h
+
+## end   gnulib module sched
+
+## begin gnulib module sched-tests
+
+TESTS += test-sched
+check_PROGRAMS += test-sched
+EXTRA_DIST += test-sched.c
+
+## end   gnulib module sched-tests
+
+## begin gnulib module select
+
+
+EXTRA_DIST += select.c
+
+EXTRA_libtests_a_SOURCES += select.c
+
+## end   gnulib module select
+
+## begin gnulib module select-tests
+
+TESTS += test-select test-select-in.sh test-select-out.sh
+# test-select-stdin has to be run by hand.
+check_PROGRAMS += test-select test-select-fd test-select-stdin
+test_select_LDADD = $(LDADD) @LIB_SELECT@ @LIBSOCKET@ $(INET_PTON_LIB)
+test_select_fd_LDADD = $(LDADD) @LIB_SELECT@
+test_select_stdin_LDADD = $(LDADD) @LIB_SELECT@
+EXTRA_DIST += macros.h signature.h test-select.c test-select.h test-select-fd.c test-select-in.sh test-select-out.sh test-select-stdin.c
+
+## end   gnulib module select-tests
+
+## begin gnulib module setenv
+
+
+EXTRA_DIST += setenv.c
+
+EXTRA_libtests_a_SOURCES += setenv.c
+
+## end   gnulib module setenv
+
+## begin gnulib module setenv-tests
+
+TESTS += test-setenv
+check_PROGRAMS += test-setenv
+EXTRA_DIST += test-setenv.c signature.h macros.h
+
+## end   gnulib module setenv-tests
+
+## begin gnulib module setlocale
+
+
+EXTRA_DIST += setlocale.c
+
+EXTRA_libtests_a_SOURCES += setlocale.c
+
+## end   gnulib module setlocale
+
+## begin gnulib module setlocale-null-tests
+
+TESTS += \
+  test-setlocale_null \
+  test-setlocale_null-mt-one \
+  test-setlocale_null-mt-all
+check_PROGRAMS += \
+  test-setlocale_null \
+  test-setlocale_null-mt-one \
+  test-setlocale_null-mt-all
+test_setlocale_null_LDADD = $(LDADD) @LIB_SETLOCALE_NULL@
+test_setlocale_null_mt_one_LDADD = $(LDADD) @LIB_SETLOCALE_NULL@ $(LIBMULTITHREAD) $(LIB_NANOSLEEP)
+test_setlocale_null_mt_all_LDADD = $(LDADD) @LIB_SETLOCALE_NULL@ $(LIBMULTITHREAD) $(LIB_NANOSLEEP)
+EXTRA_DIST += test-setlocale_null.c test-setlocale_null-mt-one.c test-setlocale_null-mt-all.c
+
+## end   gnulib module setlocale-null-tests
+
+## begin gnulib module setlocale-tests
+
+TESTS += test-setlocale1.sh test-setlocale2.sh
+TESTS_ENVIRONMENT += \
+  LOCALE_FR='@LOCALE_FR@' \
+  LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' \
+  LOCALE_JA='@LOCALE_JA@' \
+  LOCALE_ZH_CN='@LOCALE_ZH_CN@'
+check_PROGRAMS += test-setlocale1 test-setlocale2
+test_setlocale1_LDADD = $(LDADD) @LIB_SETLOCALE@
+test_setlocale2_LDADD = $(LDADD) @LIB_SETLOCALE@
+EXTRA_DIST += test-setlocale1.sh test-setlocale1.c test-setlocale2.sh test-setlocale2.c signature.h macros.h
+
+## end   gnulib module setlocale-tests
+
+## begin gnulib module setsockopt
+
+
+EXTRA_DIST += setsockopt.c w32sock.h
+
+EXTRA_libtests_a_SOURCES += setsockopt.c
+
+## end   gnulib module setsockopt
+
+## begin gnulib module setsockopt-tests
+
+TESTS += test-setsockopt
+check_PROGRAMS += test-setsockopt
+test_setsockopt_LDADD = $(LDADD) @LIBSOCKET@
+EXTRA_DIST += test-setsockopt.c signature.h macros.h
+
+## end   gnulib module setsockopt-tests
+
+## begin gnulib module sigaction
+
+libtests_a_SOURCES += sig-handler.c
+
+EXTRA_DIST += sig-handler.h sigaction.c
+
+EXTRA_libtests_a_SOURCES += sigaction.c
+
+## end   gnulib module sigaction
+
+## begin gnulib module sigaction-tests
+
+TESTS += test-sigaction
+check_PROGRAMS += test-sigaction
+EXTRA_DIST += test-sigaction.c signature.h macros.h
+
+## end   gnulib module sigaction-tests
+
+## begin gnulib module signal-h-tests
+
+TESTS += test-signal-h
+check_PROGRAMS += test-signal-h
+EXTRA_DIST += test-signal-h.c
+
+## end   gnulib module signal-h-tests
+
+## begin gnulib module sigprocmask
+
+
+EXTRA_DIST += sigprocmask.c
+
+EXTRA_libtests_a_SOURCES += sigprocmask.c
+
+## end   gnulib module sigprocmask
+
+## begin gnulib module sigprocmask-tests
+
+TESTS += test-sigprocmask
+check_PROGRAMS += test-sigprocmask
+EXTRA_DIST += test-sigprocmask.c signature.h macros.h
+
+## end   gnulib module sigprocmask-tests
+
+## begin gnulib module sigsegv-tests
+
+TESTS += \
+  test-sigsegv-catch-segv1 \
+  test-sigsegv-catch-segv2 \
+  test-sigsegv-catch-stackoverflow1 \
+  test-sigsegv-catch-stackoverflow2
+check_PROGRAMS += \
+  test-sigsegv-catch-segv1 \
+  test-sigsegv-catch-segv2 \
+  test-sigsegv-catch-stackoverflow1 \
+  test-sigsegv-catch-stackoverflow2
+test_sigsegv_catch_segv1_LDADD = $(LDADD) $(LIBSIGSEGV)
+test_sigsegv_catch_segv2_LDADD = $(LDADD) $(LIBSIGSEGV)
+test_sigsegv_catch_stackoverflow1_LDADD = $(LDADD) $(LIBSIGSEGV)
+test_sigsegv_catch_stackoverflow2_LDADD = $(LDADD) $(LIBSIGSEGV)
+EXTRA_DIST += test-sigsegv-catch-segv1.c test-sigsegv-catch-segv2.c test-sigsegv-catch-stackoverflow1.c test-sigsegv-catch-stackoverflow2.c altstack-util.h mmap-anon-util.h
+
+## end   gnulib module sigsegv-tests
+
+## begin gnulib module size_max
+
+libtests_a_SOURCES += size_max.h
+
+## end   gnulib module size_max
+
+## begin gnulib module sleep
+
+
+EXTRA_DIST += sleep.c
+
+EXTRA_libtests_a_SOURCES += sleep.c
+
+## end   gnulib module sleep
+
+## begin gnulib module sleep-tests
+
+TESTS += test-sleep
+check_PROGRAMS += test-sleep
+EXTRA_DIST += test-sleep.c signature.h macros.h
+
+## end   gnulib module sleep-tests
+
+## begin gnulib module snippet/_Noreturn
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+
+_NORETURN_H=$(srcdir)/_Noreturn.h
+
+EXTRA_DIST += _Noreturn.h
+
+## end   gnulib module snippet/_Noreturn
+
+## begin gnulib module snippet/arg-nonnull
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+
+ARG_NONNULL_H=$(srcdir)/arg-nonnull.h
+
+EXTRA_DIST += arg-nonnull.h
+
+## end   gnulib module snippet/arg-nonnull
+
+## begin gnulib module snippet/c++defs
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+
+CXXDEFS_H=$(srcdir)/c++defs.h
+
+EXTRA_DIST += c++defs.h
+
+## end   gnulib module snippet/c++defs
+
+## begin gnulib module snippet/warn-on-use
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+
+WARN_ON_USE_H=$(srcdir)/warn-on-use.h
+
+EXTRA_DIST += warn-on-use.h
+
+## end   gnulib module snippet/warn-on-use
+
+## begin gnulib module snprintf
+
+
+EXTRA_DIST += snprintf.c
+
+EXTRA_libtests_a_SOURCES += snprintf.c
+
+## end   gnulib module snprintf
+
+## begin gnulib module snprintf-tests
+
+TESTS += test-snprintf
+check_PROGRAMS += test-snprintf
+
+EXTRA_DIST += test-snprintf.c signature.h macros.h
+
+## end   gnulib module snprintf-tests
+
+## begin gnulib module socket
+
+
+EXTRA_DIST += socket.c w32sock.h
+
+EXTRA_libtests_a_SOURCES += socket.c
+
+## end   gnulib module socket
+
+## begin gnulib module sockets
+
+libtests_a_SOURCES += sockets.h sockets.c
+
+EXTRA_DIST += w32sock.h
+
+## end   gnulib module sockets
+
+## begin gnulib module sockets-tests
+
+TESTS += test-sockets
+check_PROGRAMS += test-sockets
+test_sockets_LDADD = $(LDADD) @LIBSOCKET@
+EXTRA_DIST += test-sockets.c
+
+## end   gnulib module sockets-tests
+
+## begin gnulib module stat-tests
+
+TESTS += test-stat
+check_PROGRAMS += test-stat
+test_stat_LDADD = $(LDADD) $(LIBINTL)
+EXTRA_DIST += test-stat.h test-stat.c signature.h macros.h
+
+## end   gnulib module stat-tests
+
+## begin gnulib module stat-time-tests
+
+TESTS += test-stat-time
+check_PROGRAMS += test-stat-time
+test_stat_time_LDADD = $(LDADD) $(LIB_NANOSLEEP)
+EXTRA_DIST += test-stat-time.c macros.h nap.h
+
+## end   gnulib module stat-time-tests
+
+## begin gnulib module stdalign-tests
+
+TESTS += test-stdalign
+check_PROGRAMS += test-stdalign
+EXTRA_DIST += test-stdalign.c macros.h
+
+## end   gnulib module stdalign-tests
+
+## begin gnulib module stdbool-tests
+
+TESTS += test-stdbool
+check_PROGRAMS += test-stdbool
+EXTRA_DIST += test-stdbool.c
+
+## end   gnulib module stdbool-tests
+
+## begin gnulib module stddef-tests
+
+TESTS += test-stddef
+check_PROGRAMS += test-stddef
+EXTRA_DIST += test-stddef.c
+
+## end   gnulib module stddef-tests
+
+## begin gnulib module stdint-tests
+
+TESTS += test-stdint
+check_PROGRAMS += test-stdint
+EXTRA_DIST += test-stdint.c
+
+## end   gnulib module stdint-tests
+
+## begin gnulib module stdio-tests
+
+TESTS += test-stdio
+check_PROGRAMS += test-stdio
+EXTRA_DIST += test-stdio.c
+
+## end   gnulib module stdio-tests
+
+## begin gnulib module stdlib-tests
+
+TESTS += test-stdlib
+check_PROGRAMS += test-stdlib
+EXTRA_DIST += test-stdlib.c test-sys_wait.h
+
+## end   gnulib module stdlib-tests
+
+## begin gnulib module strerror-tests
+
+TESTS += test-strerror
+check_PROGRAMS += test-strerror
+EXTRA_DIST += test-strerror.c signature.h macros.h
+
+## end   gnulib module strerror-tests
+
+## begin gnulib module strerror_r-posix
+
+
+EXTRA_DIST += strerror_r.c
+
+EXTRA_libtests_a_SOURCES += strerror_r.c
+
+## end   gnulib module strerror_r-posix
+
+## begin gnulib module strerror_r-posix-tests
+
+TESTS += test-strerror_r
+check_PROGRAMS += test-strerror_r
+EXTRA_DIST += test-strerror_r.c signature.h macros.h
+
+## end   gnulib module strerror_r-posix-tests
+
+## begin gnulib module striconv-tests
+
+TESTS += test-striconv
+check_PROGRAMS += test-striconv
+test_striconv_LDADD = $(LDADD) @LIBICONV@
+
+EXTRA_DIST += test-striconv.c macros.h
+
+## end   gnulib module striconv-tests
+
+## begin gnulib module string-tests
+
+TESTS += test-string
+check_PROGRAMS += test-string
+EXTRA_DIST += test-string.c
+
+## end   gnulib module string-tests
+
+## begin gnulib module strnlen-tests
+
+TESTS += test-strnlen
+check_PROGRAMS += test-strnlen
+EXTRA_DIST += test-strnlen.c zerosize-ptr.h signature.h macros.h
+
+## end   gnulib module strnlen-tests
+
+## begin gnulib module strstr-tests
+
+TESTS += test-strstr
+check_PROGRAMS += test-strstr
+EXTRA_DIST += test-strstr.c zerosize-ptr.h signature.h macros.h
+
+## end   gnulib module strstr-tests
+
+## begin gnulib module strtoimax-tests
+
+TESTS += test-strtoimax
+check_PROGRAMS += test-strtoimax
+EXTRA_DIST += test-strtoimax.c signature.h macros.h
+
+## end   gnulib module strtoimax-tests
+
+## begin gnulib module strtoll-tests
+
+TESTS += test-strtoll
+check_PROGRAMS += test-strtoll
+EXTRA_DIST += test-strtoll.c signature.h macros.h
+
+## end   gnulib module strtoll-tests
+
+## begin gnulib module strtoull-tests
+
+TESTS += test-strtoull
+check_PROGRAMS += test-strtoull
+EXTRA_DIST += test-strtoull.c signature.h macros.h
+
+## end   gnulib module strtoull-tests
+
+## begin gnulib module strtoumax-tests
+
+TESTS += test-strtoumax
+check_PROGRAMS += test-strtoumax
+EXTRA_DIST += test-strtoumax.c signature.h macros.h
+
+## end   gnulib module strtoumax-tests
+
+## begin gnulib module symlink
+
+
+EXTRA_DIST += symlink.c
+
+EXTRA_libtests_a_SOURCES += symlink.c
+
+## end   gnulib module symlink
+
+## begin gnulib module symlink-tests
+
+TESTS += test-symlink
+check_PROGRAMS += test-symlink
+EXTRA_DIST += test-symlink.h test-symlink.c signature.h macros.h
+
+## end   gnulib module symlink-tests
+
+## begin gnulib module sys_ioctl
+
+BUILT_SOURCES += sys/ioctl.h
+
+# We need the following in order to create <sys/ioctl.h> when the system
+# does not have a complete one.
+sys/ioctl.h: sys_ioctl.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_at)$(MKDIR_P) sys
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''HAVE_SYS_IOCTL_H''@|$(HAVE_SYS_IOCTL_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SYS_IOCTL_H''@|$(NEXT_SYS_IOCTL_H)|g' \
+	      -e 's/@''GNULIB_IOCTL''@/$(GL_GNULIB_IOCTL)/g' \
+	      -e 's|@''SYS_IOCTL_H_HAVE_WINSOCK2_H''@|$(SYS_IOCTL_H_HAVE_WINSOCK2_H)|g' \
+	      -e 's|@''SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS''@|$(SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS)|g' \
+	      -e 's|@''REPLACE_IOCTL''@|$(REPLACE_IOCTL)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/sys_ioctl.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += sys/ioctl.h sys/ioctl.h-t
+MOSTLYCLEANDIRS += sys
+
+EXTRA_DIST += sys_ioctl.in.h
+
+## end   gnulib module sys_ioctl
+
+## begin gnulib module sys_ioctl-tests
+
+TESTS += test-sys_ioctl
+check_PROGRAMS += test-sys_ioctl
+EXTRA_DIST += test-sys_ioctl.c
+
+## end   gnulib module sys_ioctl-tests
+
+## begin gnulib module sys_select
+
+BUILT_SOURCES += sys/select.h
+
+# We need the following in order to create <sys/select.h> when the system
+# doesn't have one that works with the given compiler.
+sys/select.h: sys_select.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_at)$(MKDIR_P) sys
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SYS_SELECT_H''@|$(NEXT_SYS_SELECT_H)|g' \
+	      -e 's|@''HAVE_SYS_SELECT_H''@|$(HAVE_SYS_SELECT_H)|g' \
+	      -e 's/@''GNULIB_PSELECT''@/$(GL_GNULIB_PSELECT)/g' \
+	      -e 's/@''GNULIB_SELECT''@/$(GL_GNULIB_SELECT)/g' \
+	      -e 's|@''HAVE_WINSOCK2_H''@|$(HAVE_WINSOCK2_H)|g' \
+	      -e 's|@''HAVE_PSELECT''@|$(HAVE_PSELECT)|g' \
+	      -e 's|@''REPLACE_PSELECT''@|$(REPLACE_PSELECT)|g' \
+	      -e 's|@''REPLACE_SELECT''@|$(REPLACE_SELECT)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/sys_select.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += sys/select.h sys/select.h-t
+MOSTLYCLEANDIRS += sys
+
+EXTRA_DIST += sys_select.in.h
+
+## end   gnulib module sys_select
+
+## begin gnulib module sys_select-tests
+
+TESTS += test-sys_select
+check_PROGRAMS += test-sys_select
+EXTRA_DIST += test-sys_select.c signature.h
+
+## end   gnulib module sys_select-tests
+
+## begin gnulib module sys_socket
+
+BUILT_SOURCES += sys/socket.h
+libtests_a_SOURCES += sys_socket.c
+
+# We need the following in order to create <sys/socket.h> when the system
+# doesn't have one that works with the given compiler.
+sys/socket.h: sys_socket.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H) $(ARG_NONNULL_H)
+	$(AM_V_at)$(MKDIR_P) sys
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SYS_SOCKET_H''@|$(NEXT_SYS_SOCKET_H)|g' \
+	      -e 's|@''HAVE_SYS_SOCKET_H''@|$(HAVE_SYS_SOCKET_H)|g' \
+	      -e 's/@''GNULIB_CLOSE''@/$(GL_GNULIB_CLOSE)/g' \
+	      -e 's/@''GNULIB_SOCKET''@/$(GL_GNULIB_SOCKET)/g' \
+	      -e 's/@''GNULIB_CONNECT''@/$(GL_GNULIB_CONNECT)/g' \
+	      -e 's/@''GNULIB_ACCEPT''@/$(GL_GNULIB_ACCEPT)/g' \
+	      -e 's/@''GNULIB_BIND''@/$(GL_GNULIB_BIND)/g' \
+	      -e 's/@''GNULIB_GETPEERNAME''@/$(GL_GNULIB_GETPEERNAME)/g' \
+	      -e 's/@''GNULIB_GETSOCKNAME''@/$(GL_GNULIB_GETSOCKNAME)/g' \
+	      -e 's/@''GNULIB_GETSOCKOPT''@/$(GL_GNULIB_GETSOCKOPT)/g' \
+	      -e 's/@''GNULIB_LISTEN''@/$(GL_GNULIB_LISTEN)/g' \
+	      -e 's/@''GNULIB_RECV''@/$(GL_GNULIB_RECV)/g' \
+	      -e 's/@''GNULIB_SEND''@/$(GL_GNULIB_SEND)/g' \
+	      -e 's/@''GNULIB_RECVFROM''@/$(GL_GNULIB_RECVFROM)/g' \
+	      -e 's/@''GNULIB_SENDTO''@/$(GL_GNULIB_SENDTO)/g' \
+	      -e 's/@''GNULIB_SETSOCKOPT''@/$(GL_GNULIB_SETSOCKOPT)/g' \
+	      -e 's/@''GNULIB_SHUTDOWN''@/$(GL_GNULIB_SHUTDOWN)/g' \
+	      -e 's/@''GNULIB_ACCEPT4''@/$(GL_GNULIB_ACCEPT4)/g' \
+	      -e 's|@''HAVE_WINSOCK2_H''@|$(HAVE_WINSOCK2_H)|g' \
+	      -e 's|@''HAVE_WS2TCPIP_H''@|$(HAVE_WS2TCPIP_H)|g' \
+	      -e 's|@''HAVE_STRUCT_SOCKADDR_STORAGE''@|$(HAVE_STRUCT_SOCKADDR_STORAGE)|g' \
+	      -e 's|@''HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY''@|$(HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY)|g' \
+	      -e 's|@''HAVE_SA_FAMILY_T''@|$(HAVE_SA_FAMILY_T)|g' \
+	      -e 's|@''HAVE_ACCEPT4''@|$(HAVE_ACCEPT4)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/sys_socket.in.h; \
+	} > $@-t && \
+	mv -f $@-t $@
+MOSTLYCLEANFILES += sys/socket.h sys/socket.h-t
+MOSTLYCLEANDIRS += sys
+
+EXTRA_DIST += sys_socket.in.h
+
+## end   gnulib module sys_socket
+
+## begin gnulib module sys_socket-tests
+
+TESTS += test-sys_socket
+check_PROGRAMS += test-sys_socket
+EXTRA_DIST += test-sys_socket.c
+
+## end   gnulib module sys_socket-tests
+
+## begin gnulib module sys_stat-tests
+
+TESTS += test-sys_stat
+check_PROGRAMS += test-sys_stat
+EXTRA_DIST += test-sys_stat.c
+
+## end   gnulib module sys_stat-tests
+
+## begin gnulib module sys_time
+
+BUILT_SOURCES += sys/time.h
+
+# We need the following in order to create <sys/time.h> when the system
+# doesn't have one that works with the given compiler.
+sys/time.h: sys_time.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_at)$(MKDIR_P) sys
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's/@''HAVE_SYS_TIME_H''@/$(HAVE_SYS_TIME_H)/g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SYS_TIME_H''@|$(NEXT_SYS_TIME_H)|g' \
+	      -e 's/@''GNULIB_GETTIMEOFDAY''@/$(GL_GNULIB_GETTIMEOFDAY)/g' \
+	      -e 's|@''HAVE_WINSOCK2_H''@|$(HAVE_WINSOCK2_H)|g' \
+	      -e 's/@''HAVE_GETTIMEOFDAY''@/$(HAVE_GETTIMEOFDAY)/g' \
+	      -e 's/@''HAVE_STRUCT_TIMEVAL''@/$(HAVE_STRUCT_TIMEVAL)/g' \
+	      -e 's/@''REPLACE_GETTIMEOFDAY''@/$(REPLACE_GETTIMEOFDAY)/g' \
+	      -e 's/@''REPLACE_STRUCT_TIMEVAL''@/$(REPLACE_STRUCT_TIMEVAL)/g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/sys_time.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += sys/time.h sys/time.h-t
+
+EXTRA_DIST += sys_time.in.h
+
+## end   gnulib module sys_time
+
+## begin gnulib module sys_time-tests
+
+TESTS += test-sys_time
+check_PROGRAMS += test-sys_time
+EXTRA_DIST += test-sys_time.c
+
+## end   gnulib module sys_time-tests
+
+## begin gnulib module sys_types-tests
+
+TESTS += test-sys_types
+check_PROGRAMS += test-sys_types
+EXTRA_DIST += test-sys_types.c
+
+## end   gnulib module sys_types-tests
+
+## begin gnulib module sys_uio
+
+BUILT_SOURCES += sys/uio.h
+
+# We need the following in order to create <sys/uio.h> when the system
+# doesn't have one that works with the given compiler.
+sys/uio.h: sys_uio.in.h $(top_builddir)/config.status
+	$(AM_V_at)$(MKDIR_P) sys
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SYS_UIO_H''@|$(NEXT_SYS_UIO_H)|g' \
+	      -e 's|@''HAVE_SYS_UIO_H''@|$(HAVE_SYS_UIO_H)|g' \
+	      < $(srcdir)/sys_uio.in.h; \
+	} > $@-t && \
+	mv -f $@-t $@
+MOSTLYCLEANFILES += sys/uio.h sys/uio.h-t
+MOSTLYCLEANDIRS += sys
+
+EXTRA_DIST += sys_uio.in.h
+
+## end   gnulib module sys_uio
+
+## begin gnulib module sys_uio-tests
+
+TESTS += test-sys_uio
+check_PROGRAMS += test-sys_uio
+EXTRA_DIST += test-sys_uio.c
+
+## end   gnulib module sys_uio-tests
+
+## begin gnulib module test-framework-sh-tests
+
+TESTS += test-init.sh
+EXTRA_DIST += init.sh
+EXTRA_DIST += test-init.sh
+
+## end   gnulib module test-framework-sh-tests
+
+## begin gnulib module thread
+
+libtests_a_SOURCES += glthread/thread.h glthread/thread.c
+
+## end   gnulib module thread
+
+## begin gnulib module thread-optim
+
+
+EXTRA_DIST += thread-optim.h
+
+## end   gnulib module thread-optim
+
+## begin gnulib module thread-tests
+
+TESTS += test-thread_self test-thread_create
+check_PROGRAMS += test-thread_self test-thread_create
+test_thread_self_LDADD = $(LDADD) @LIBTHREAD@
+test_thread_create_LDADD = $(LDADD) @LIBMULTITHREAD@
+EXTRA_DIST += test-thread_self.c test-thread_create.c macros.h
+
+## end   gnulib module thread-tests
+
+## begin gnulib module time-tests
+
+TESTS += test-time
+check_PROGRAMS += test-time
+EXTRA_DIST += test-time.c
+
+## end   gnulib module time-tests
+
+## begin gnulib module unistd-safer-tests
+
+TESTS += test-dup-safer
+check_PROGRAMS += test-dup-safer
+EXTRA_DIST += test-dup-safer.c macros.h
+
+## end   gnulib module unistd-safer-tests
+
+## begin gnulib module unistd-tests
+
+TESTS += test-unistd
+check_PROGRAMS += test-unistd
+EXTRA_DIST += test-unistd.c
+
+## end   gnulib module unistd-tests
+
+## begin gnulib module unistr/u8-mbtoucr-tests
+
+TESTS += test-u8-mbtoucr
+check_PROGRAMS += test-u8-mbtoucr
+test_u8_mbtoucr_SOURCES = unistr/test-u8-mbtoucr.c
+test_u8_mbtoucr_LDADD = $(LDADD) $(LIBUNISTRING)
+EXTRA_DIST += unistr/test-u8-mbtoucr.c macros.h
+
+## end   gnulib module unistr/u8-mbtoucr-tests
+
+## begin gnulib module unistr/u8-uctomb-tests
+
+TESTS += test-u8-uctomb
+check_PROGRAMS += test-u8-uctomb
+test_u8_uctomb_SOURCES = unistr/test-u8-uctomb.c
+test_u8_uctomb_LDADD = $(LDADD) $(LIBUNISTRING)
+EXTRA_DIST += unistr/test-u8-uctomb.c macros.h
+
+## end   gnulib module unistr/u8-uctomb-tests
+
+## begin gnulib module uniwidth/width-tests
+
+TESTS += test-uc_width uniwidth/test-uc_width2.sh
+check_PROGRAMS += test-uc_width test-uc_width2
+test_uc_width_SOURCES = uniwidth/test-uc_width.c
+test_uc_width_LDADD = $(LDADD) $(LIBUNISTRING)
+test_uc_width2_SOURCES = uniwidth/test-uc_width2.c
+test_uc_width2_LDADD = $(LDADD) $(LIBUNISTRING)
+EXTRA_DIST += uniwidth/test-uc_width.c uniwidth/test-uc_width2.c uniwidth/test-uc_width2.sh macros.h
+
+## end   gnulib module uniwidth/width-tests
+
+## begin gnulib module unsetenv
+
+
+EXTRA_DIST += unsetenv.c
+
+EXTRA_libtests_a_SOURCES += unsetenv.c
+
+## end   gnulib module unsetenv
+
+## begin gnulib module unsetenv-tests
+
+TESTS += test-unsetenv
+check_PROGRAMS += test-unsetenv
+EXTRA_DIST += test-unsetenv.c signature.h macros.h
+
+## end   gnulib module unsetenv-tests
+
+## begin gnulib module vasnprintf
+
+
+EXTRA_DIST += asnprintf.c float+.h printf-args.c printf-args.h printf-parse.c printf-parse.h vasnprintf.c vasnprintf.h
+
+EXTRA_libtests_a_SOURCES += asnprintf.c printf-args.c printf-parse.c vasnprintf.c
+
+## end   gnulib module vasnprintf
+
+## begin gnulib module vasnprintf-tests
+
+TESTS += test-vasnprintf
+check_PROGRAMS += test-vasnprintf
+
+EXTRA_DIST += test-vasnprintf.c macros.h
+
+## end   gnulib module vasnprintf-tests
+
+## begin gnulib module vc-list-files-tests
+
+TESTS += test-vc-list-files-git.sh
+TESTS += test-vc-list-files-cvs.sh
+TESTS_ENVIRONMENT += abs_aux_dir='$(abs_aux_dir)'
+EXTRA_DIST += test-vc-list-files-git.sh test-vc-list-files-cvs.sh
+
+## end   gnulib module vc-list-files-tests
+
+## begin gnulib module verify-tests
+
+TESTS_ENVIRONMENT += MAKE='$(MAKE)'
+TESTS += test-verify test-verify.sh
+check_PROGRAMS += test-verify
+# test-verify-try is never built, but test-verify.sh needs a rule to
+# build test-verify-try.o.
+EXTRA_PROGRAMS += test-verify-try
+
+# This test expects compilation of test-verify-try.c to fail, and
+# each time it fails, the makefile rule does not perform the usual
+#  "mv -f $name.Tpo $name.po, so tell make clean to remove that file.
+MOSTLYCLEANFILES += .deps/test-verify-try.Tpo
+EXTRA_DIST += test-verify.c test-verify-try.c test-verify.sh
+
+## end   gnulib module verify-tests
+
+## begin gnulib module version-etc-tests
+
+TESTS += test-version-etc.sh
+check_PROGRAMS += test-version-etc
+test_version_etc_LDADD = $(LDADD) @LIBINTL@
+EXTRA_DIST += test-version-etc.c test-version-etc.sh
+
+## end   gnulib module version-etc-tests
+
+## begin gnulib module wchar-tests
+
+TESTS += test-wchar
+check_PROGRAMS += test-wchar
+EXTRA_DIST += test-wchar.c
+
+## end   gnulib module wchar-tests
+
+## begin gnulib module wcrtomb-tests
+
+TESTS += \
+  test-wcrtomb.sh \
+  test-wcrtomb-w32-1.sh test-wcrtomb-w32-2.sh test-wcrtomb-w32-3.sh \
+  test-wcrtomb-w32-4.sh test-wcrtomb-w32-5.sh test-wcrtomb-w32-6.sh \
+  test-wcrtomb-w32-7.sh
+TESTS_ENVIRONMENT += \
+  LOCALE_FR='@LOCALE_FR@' \
+  LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' \
+  LOCALE_JA='@LOCALE_JA@' \
+  LOCALE_ZH_CN='@LOCALE_ZH_CN@'
+check_PROGRAMS += test-wcrtomb test-wcrtomb-w32
+test_wcrtomb_LDADD = $(LDADD) $(LIB_SETLOCALE)
+EXTRA_DIST += test-wcrtomb.sh test-wcrtomb.c test-wcrtomb-w32-1.sh test-wcrtomb-w32-2.sh test-wcrtomb-w32-3.sh test-wcrtomb-w32-4.sh test-wcrtomb-w32-5.sh test-wcrtomb-w32-6.sh test-wcrtomb-w32-7.sh test-wcrtomb-w32.c signature.h macros.h
+
+## end   gnulib module wcrtomb-tests
+
+## begin gnulib module wctype-h-tests
+
+TESTS += test-wctype-h
+check_PROGRAMS += test-wctype-h
+EXTRA_DIST += test-wctype-h.c macros.h
+
+## end   gnulib module wctype-h-tests
+
+## begin gnulib module wcwidth-tests
+
+TESTS += test-wcwidth
+check_PROGRAMS += test-wcwidth
+test_wcwidth_LDADD = $(LDADD) $(LIB_SETLOCALE) $(LIBUNISTRING)
+EXTRA_DIST += test-wcwidth.c signature.h macros.h
+
+## end   gnulib module wcwidth-tests
+
+## begin gnulib module windows-thread
+
+
+EXTRA_DIST += windows-thread.c windows-thread.h
+
+EXTRA_libtests_a_SOURCES += windows-thread.c
+
+## end   gnulib module windows-thread
+
+## begin gnulib module windows-tls
+
+
+EXTRA_DIST += windows-tls.c windows-tls.h
+
+EXTRA_libtests_a_SOURCES += windows-tls.c
+
+## end   gnulib module windows-tls
+
+## begin gnulib module xalloc-die-tests
+
+TESTS += test-xalloc-die.sh
+check_PROGRAMS += test-xalloc-die
+test_xalloc_die_LDADD = $(LDADD) @LIBINTL@
+EXTRA_DIST += test-xalloc-die.c test-xalloc-die.sh
+
+## end   gnulib module xalloc-die-tests
+
+## begin gnulib module xsize
+
+libtests_a_SOURCES += xsize.h xsize.c
+
+## end   gnulib module xsize
+
+## begin gnulib module xstrtoimax-tests
+
+TESTS += test-xstrtoimax.sh
+check_PROGRAMS += test-xstrtoimax
+test_xstrtoimax_LDADD = $(LDADD) @LIBINTL@
+EXTRA_DIST += test-xstrtoimax.c test-xstrtoimax.sh
+
+## end   gnulib module xstrtoimax-tests
+
+## begin gnulib module xstrtol-error
+
+libtests_a_SOURCES += xstrtol-error.c
+
+EXTRA_DIST += xstrtol-error.h
+
+## end   gnulib module xstrtol-error
+
+## begin gnulib module xstrtol-tests
+
+TESTS += test-xstrtol.sh
+check_PROGRAMS += test-xstrtol test-xstrtoul
+test_xstrtol_LDADD = $(LDADD) @LIBINTL@
+test_xstrtoul_LDADD = $(LDADD) @LIBINTL@
+EXTRA_DIST += test-xstrtol.c test-xstrtoul.c test-xstrtol.sh
+
+## end   gnulib module xstrtol-tests
+
+all: all-notice
+all-notice:
+	@echo '## ---------------------------------------------------- ##'
+	@echo '## ------------------- Gnulib tests ------------------- ##'
+	@echo '## You can ignore compiler warnings in this directory.  ##'
+	@echo '## ---------------------------------------------------- ##'
+
+check-am: check-notice
+check-notice:
+	@echo '## ---------------------------------------------------------------------- ##'
+	@echo '## ---------------------------- Gnulib tests ---------------------------- ##'
+	@echo '## Please report test failures in this directory to <bug-gnulib@gnu.org>. ##'
+	@echo '## ---------------------------------------------------------------------- ##'
+
+# Clean up after Solaris cc.
+clean-local:
+	rm -rf SunWS_cache
+
+mostlyclean-local: mostlyclean-generic
+	@for dir in '' $(MOSTLYCLEANDIRS); do \
+	  if test -n "$$dir" && test -d $$dir; then \
+	    echo "rmdir $$dir"; rmdir $$dir; \
+	  fi; \
+	done; \
+	:
diff --git a/src/grep/gnulib-tests/hash-pjw.c b/src/grep/gnulib-tests/hash-pjw.c
new file mode 100644
index 0000000..19e7762
--- /dev/null
+++ b/src/grep/gnulib-tests/hash-pjw.c
@@ -0,0 +1,40 @@
+/* hash-pjw.c -- compute a hash value from a NUL-terminated string.
+
+   Copyright (C) 2001, 2003, 2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "hash-pjw.h"
+
+#include <limits.h>
+
+#define SIZE_BITS (sizeof (size_t) * CHAR_BIT)
+
+/* A hash function for NUL-terminated char* strings using
+   the method described by Bruno Haible.
+   See https://www.haible.de/bruno/hashfunc.html.  */
+
+size_t
+hash_pjw (const void *x, size_t tablesize)
+{
+  const char *s;
+  size_t h = 0;
+
+  for (s = x; *s; s++)
+    h = *s + ((h << 9) | (h >> (SIZE_BITS - 9)));
+
+  return h % tablesize;
+}
diff --git a/src/grep/gnulib-tests/hash-pjw.h b/src/grep/gnulib-tests/hash-pjw.h
new file mode 100644
index 0000000..cb18cf3
--- /dev/null
+++ b/src/grep/gnulib-tests/hash-pjw.h
@@ -0,0 +1,23 @@
+/* hash-pjw.h -- declaration for a simple hash function
+   Copyright (C) 2001, 2003, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <stddef.h>
+
+/* Compute a hash code for a NUL-terminated string starting at X,
+   and return the hash code modulo TABLESIZE.
+   The result is platform dependent: it depends on the size of the 'size_t'
+   type and on the signedness of the 'char' type.  */
+extern size_t hash_pjw (void const *x, size_t tablesize) _GL_ATTRIBUTE_PURE;
diff --git a/src/grep/gnulib-tests/imaxtostr.c b/src/grep/gnulib-tests/imaxtostr.c
new file mode 100644
index 0000000..6a9c6a9
--- /dev/null
+++ b/src/grep/gnulib-tests/imaxtostr.c
@@ -0,0 +1,20 @@
+/* Convert 'intmax_t' integer to printable string.
+
+   Copyright (C) 2004-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#define anytostr imaxtostr
+#define inttype intmax_t
+#include "anytostr.c"
diff --git a/src/grep/gnulib-tests/inet_pton.c b/src/grep/gnulib-tests/inet_pton.c
new file mode 100644
index 0000000..14e8b0a
--- /dev/null
+++ b/src/grep/gnulib-tests/inet_pton.c
@@ -0,0 +1,268 @@
+/* inet_pton.c -- convert IPv4 and IPv6 addresses from text to binary form
+
+   Copyright (C) 2006, 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/*
+ * Copyright (c) 1996,1999 by Internet Software Consortium.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
+ * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
+ * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+#include <config.h>
+
+/* Specification.  */
+#include <arpa/inet.h>
+
+#if HAVE_DECL_INET_PTON
+
+# undef inet_pton
+
+int
+rpl_inet_pton (int af, const char *restrict src, void *restrict dst)
+{
+  return inet_pton (af, src, dst);
+}
+
+#else
+
+# include <c-ctype.h>
+# include <string.h>
+# include <errno.h>
+
+# define NS_INADDRSZ 4
+# define NS_IN6ADDRSZ 16
+# define NS_INT16SZ 2
+
+/*
+ * WARNING: Don't even consider trying to compile this on a system where
+ * sizeof(int) < 4.  sizeof(int) > 4 is fine; all the world's not a VAX.
+ */
+
+static int inet_pton4 (const char *src, unsigned char *dst);
+# if HAVE_IPV6
+static int inet_pton6 (const char *src, unsigned char *dst);
+# endif
+
+/* int
+ * inet_pton(af, src, dst)
+ *      convert from presentation format (which usually means ASCII printable)
+ *      to network format (which is usually some kind of binary format).
+ * return:
+ *      1 if the address was valid for the specified address family
+ *      0 if the address wasn't valid ('dst' is untouched in this case)
+ *      -1 if some other error occurred ('dst' is untouched in this case, too)
+ * author:
+ *      Paul Vixie, 1996.
+ */
+int
+inet_pton (int af, const char *restrict src, void *restrict dst)
+{
+  switch (af)
+    {
+    case AF_INET:
+      return (inet_pton4 (src, dst));
+
+# if HAVE_IPV6
+    case AF_INET6:
+      return (inet_pton6 (src, dst));
+# endif
+
+    default:
+      errno = EAFNOSUPPORT;
+      return (-1);
+    }
+  /* NOTREACHED */
+}
+
+/* int
+ * inet_pton4(src, dst)
+ *      like inet_aton() but without all the hexadecimal, octal (with the
+ *      exception of 0) and shorthand.
+ * return:
+ *      1 if 'src' is a valid dotted quad, else 0.
+ * notice:
+ *      does not touch 'dst' unless it's returning 1.
+ * author:
+ *      Paul Vixie, 1996.
+ */
+static int
+inet_pton4 (const char *restrict src, unsigned char *restrict dst)
+{
+  int saw_digit, octets, ch;
+  unsigned char tmp[NS_INADDRSZ], *tp;
+
+  saw_digit = 0;
+  octets = 0;
+  *(tp = tmp) = 0;
+  while ((ch = *src++) != '\0')
+    {
+
+      if (ch >= '0' && ch <= '9')
+        {
+          unsigned new = *tp * 10 + (ch - '0');
+
+          if (saw_digit && *tp == 0)
+            return (0);
+          if (new > 255)
+            return (0);
+          *tp = new;
+          if (!saw_digit)
+            {
+              if (++octets > 4)
+                return (0);
+              saw_digit = 1;
+            }
+        }
+      else if (ch == '.' && saw_digit)
+        {
+          if (octets == 4)
+            return (0);
+          *++tp = 0;
+          saw_digit = 0;
+        }
+      else
+        return (0);
+    }
+  if (octets < 4)
+    return (0);
+  memcpy (dst, tmp, NS_INADDRSZ);
+  return (1);
+}
+
+# if HAVE_IPV6
+
+/* int
+ * inet_pton6(src, dst)
+ *      convert presentation level address to network order binary form.
+ * return:
+ *      1 if 'src' is a valid [RFC1884 2.2] address, else 0.
+ * notice:
+ *      (1) does not touch 'dst' unless it's returning 1.
+ *      (2) :: in a full address is silently ignored.
+ * credit:
+ *      inspired by Mark Andrews.
+ * author:
+ *      Paul Vixie, 1996.
+ */
+static int
+inet_pton6 (const char *restrict src, unsigned char *restrict dst)
+{
+  static const char xdigits[] = "0123456789abcdef";
+  unsigned char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
+  const char *curtok;
+  int ch, saw_xdigit;
+  unsigned val;
+
+  tp = memset (tmp, '\0', NS_IN6ADDRSZ);
+  endp = tp + NS_IN6ADDRSZ;
+  colonp = NULL;
+  /* Leading :: requires some special handling. */
+  if (*src == ':')
+    if (*++src != ':')
+      return (0);
+  curtok = src;
+  saw_xdigit = 0;
+  val = 0;
+  while ((ch = c_tolower (*src++)) != '\0')
+    {
+      const char *pch;
+
+      pch = strchr (xdigits, ch);
+      if (pch != NULL)
+        {
+          val <<= 4;
+          val |= (pch - xdigits);
+          if (val > 0xffff)
+            return (0);
+          saw_xdigit = 1;
+          continue;
+        }
+      if (ch == ':')
+        {
+          curtok = src;
+          if (!saw_xdigit)
+            {
+              if (colonp)
+                return (0);
+              colonp = tp;
+              continue;
+            }
+          else if (*src == '\0')
+            {
+              return (0);
+            }
+          if (tp + NS_INT16SZ > endp)
+            return (0);
+          *tp++ = (u_char) (val >> 8) & 0xff;
+          *tp++ = (u_char) val & 0xff;
+          saw_xdigit = 0;
+          val = 0;
+          continue;
+        }
+      if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
+          inet_pton4 (curtok, tp) > 0)
+        {
+          tp += NS_INADDRSZ;
+          saw_xdigit = 0;
+          break;                /* '\0' was seen by inet_pton4(). */
+        }
+      return (0);
+    }
+  if (saw_xdigit)
+    {
+      if (tp + NS_INT16SZ > endp)
+        return (0);
+      *tp++ = (u_char) (val >> 8) & 0xff;
+      *tp++ = (u_char) val & 0xff;
+    }
+  if (colonp != NULL)
+    {
+      /*
+       * Since some memmove()'s erroneously fail to handle
+       * overlapping regions, we'll do the shift by hand.
+       */
+      const int n = tp - colonp;
+      int i;
+
+      if (tp == endp)
+        return (0);
+      for (i = 1; i <= n; i++)
+        {
+          endp[-i] = colonp[n - i];
+          colonp[n - i] = 0;
+        }
+      tp = endp;
+    }
+  if (tp != endp)
+    return (0);
+  memcpy (dst, tmp, NS_IN6ADDRSZ);
+  return (1);
+}
+
+# endif
+
+#endif
diff --git a/src/grep/gnulib-tests/init.sh b/src/grep/gnulib-tests/init.sh
new file mode 100644
index 0000000..9ef8348
--- /dev/null
+++ b/src/grep/gnulib-tests/init.sh
@@ -0,0 +1,683 @@
+# source this file; set up for tests
+
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# Using this file in a test
+# =========================
+#
+# The typical skeleton of a test looks like this:
+#
+#   #!/bin/sh
+#   . "${srcdir=.}/init.sh"; path_prepend_ .
+#   Execute some commands.
+#   Note that these commands are executed in a subdirectory, therefore you
+#   need to prepend "../" to relative filenames in the build directory.
+#   Note that the "path_prepend_ ." is useful only if the body of your
+#   test invokes programs residing in the initial directory.
+#   For example, if the programs you want to test are in src/, and this test
+#   script is named tests/test-1, then you would use "path_prepend_ ../src",
+#   or perhaps export PATH='$(abs_top_builddir)/src$(PATH_SEPARATOR)'"$$PATH"
+#   to all tests via automake's TESTS_ENVIRONMENT.
+#   Set the exit code 0 for success, 77 for skipped, or 1 or other for failure.
+#   Use the skip_ and fail_ functions to print a diagnostic and then exit
+#   with the corresponding exit code.
+#   Exit $?
+
+# Executing a test that uses this file
+# ====================================
+#
+# Running a single test:
+#   $ make check TESTS=test-foo.sh
+#
+# Running a single test, with verbose output:
+#   $ make check TESTS=test-foo.sh VERBOSE=yes
+#
+# Running a single test, keeping the temporary directory:
+#   $ make check TESTS=test-foo.sh KEEP=yes
+#
+# Running a single test, with single-stepping:
+#   1. Go into a sub-shell:
+#   $ bash
+#   2. Set relevant environment variables from TESTS_ENVIRONMENT in the
+#      Makefile:
+#   $ export srcdir=../../tests # this is an example
+#   3. Execute the commands from the test, copy&pasting them one by one:
+#   $ . "$srcdir/init.sh"; path_prepend_ .
+#   ...
+#   4. Finally
+#   $ exit
+
+# =============================================================================
+# Elementary diagnostics
+
+ME_=`expr "./$0" : '.*/\(.*\)$'`
+
+# Prepare PATH_SEPARATOR.
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+  # Determine PATH_SEPARATOR by trying to find /bin/sh in a PATH which
+  # contains only /bin. Note that ksh looks also at the FPATH variable,
+  # so we have to set that as well for the test.
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+    && { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+           || PATH_SEPARATOR=';'
+       }
+fi
+
+# We use a trap below for cleanup.  This requires us to go through
+# hoops to get the right exit status transported through the handler.
+# So use 'Exit STATUS' instead of 'exit STATUS' inside of the tests.
+# Turn off errexit here so that we don't trip the bug with OSF1/Tru64
+# sh inside this function.
+Exit () { set +e; (exit $1); exit $1; }
+
+# Print warnings (e.g., about skipped and failed tests) to this file number.
+# Override by defining to say, 9, in init.cfg, and putting say,
+#   export ...ENVVAR_SETTINGS...; $(SHELL) 9>&2
+# in the definition of TESTS_ENVIRONMENT in your tests/Makefile.am file.
+# This is useful when using automake's parallel tests mode, to print
+# the reason for skip/failure to console, rather than to the .log files.
+: ${stderr_fileno_=2}
+
+# Note that correct expansion of "$*" depends on IFS starting with ' '.
+# Always write the full diagnostic to stderr.
+# When stderr_fileno_ is not 2, also emit the first line of the
+# diagnostic to that file descriptor.
+warn_ ()
+{
+  # If IFS does not start with ' ', set it and emit the warning in a subshell.
+  case $IFS in
+    ' '*) printf '%s\n' "$*" >&2
+          test $stderr_fileno_ = 2 \
+            || { printf '%s\n' "$*" | sed 1q >&$stderr_fileno_ ; } ;;
+    *) (IFS=' '; warn_ "$@");;
+  esac
+}
+fail_ () { warn_ "$ME_: failed test: $@"; Exit 1; }
+skip_ () { warn_ "$ME_: skipped test: $@"; Exit 77; }
+fatal_ () { warn_ "$ME_: hard error: $@"; Exit 99; }
+framework_failure_ () { warn_ "$ME_: set-up failure: $@"; Exit 99; }
+
+# =============================================================================
+# Ensure the shell supports modern syntax.
+
+# Sanitize this shell to POSIX mode, if possible.
+DUALCASE=1; export DUALCASE
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+  emulate sh
+  NULLCMD=:
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else
+  case `(set -o) 2>/dev/null` in
+    *posix*) set -o posix ;;
+  esac
+fi
+
+# We require $(...) support unconditionally.
+# We require that the printf built-in work correctly regarding octal escapes;
+# this eliminates /bin/sh on AIX 7.2.
+# We require non-surprising "local" semantics (this eliminates dash).
+# This takes the admittedly draconian step of eliminating dash, because the
+# assignment tab=$(printf '\t') works fine, yet preceding it with "local "
+# transforms it into an assignment that sets the variable to the empty string.
+# That is too counter-intuitive, and can lead to subtle run-time malfunction.
+# The example below is less subtle in that with dash, it evokes the run-time
+# exception "dash: 1: local: 1: bad variable name".
+# We require a few additional shell features only when $EXEEXT is nonempty,
+# in order to support automatic $EXEEXT emulation:
+# - hyphen-containing alias names
+# - we prefer to use ${var#...} substitution, rather than having
+#   to work around lack of support for that feature.
+# The following code attempts to find a shell with support for these features.
+# If the current shell passes the test, we're done.  Otherwise, test other
+# shells until we find one that passes.  If one is found, re-exec it.
+# If no acceptable shell is found, skip the current test.
+#
+# The "...set -x; P=1 true 2>err..." test is to disqualify any shell that
+# emits "P=1" into err, as /bin/sh from SunOS 5.11 and OpenBSD 4.7 do.
+#
+# Use "9" to indicate success (rather than 0), in case some shell acts
+# like Solaris 10's /bin/sh but exits successfully instead of with status 2.
+
+# Eval this code in a subshell to determine a shell's suitability.
+# 10 - passes all tests; ok to use
+#  9 - ok, but enabling "set -x" corrupts app stderr; prefer higher score
+#  ? - not ok
+gl_shell_test_script_='
+test $(echo y) = y || exit 1
+LC_ALL=en_US.UTF-8 printf "\\351" 2>/dev/null \
+  | LC_ALL=C tr "\\351" x | LC_ALL=C grep "^x$" > /dev/null \
+  || exit 1
+printf "\\351" 2>/dev/null \
+  | LC_ALL=C tr "\\351" x | LC_ALL=C grep "^x$" > /dev/null \
+  || exit 1
+f_local_() { local v=1; }; f_local_ || exit 1
+f_dash_local_fail_() { local t=$(printf " 1"); }; f_dash_local_fail_
+score_=10
+if test "$VERBOSE" = yes; then
+  test -n "$( (exec 3>&1; set -x; P=1 true 2>&3) 2> /dev/null)" && score_=9
+fi
+test -z "$EXEEXT" && exit $score_
+shopt -s expand_aliases
+alias a-b="echo zoo"
+v=abx
+     test ${v%x} = ab \
+  && test ${v#a} = bx \
+  && test $(a-b) = zoo \
+  && exit $score_
+'
+
+if test "x$1" = "x--no-reexec"; then
+  shift
+else
+  # Assume a working shell.  Export to subshells (setup_ needs this).
+  gl_set_x_corrupts_stderr_=false
+  export gl_set_x_corrupts_stderr_
+
+  # Record the first marginally acceptable shell.
+  marginal_=
+
+  # Search for a shell that meets our requirements.
+  for re_shell_ in __current__ "${CONFIG_SHELL:-no_shell}" \
+      /bin/sh bash dash zsh pdksh fail
+  do
+    test "$re_shell_" = no_shell && continue
+
+    # If we've made it all the way to the sentinel, "fail" without
+    # finding even a marginal shell, skip this test.
+    if test "$re_shell_" = fail; then
+      test -z "$marginal_" && skip_ failed to find an adequate shell
+      re_shell_=$marginal_
+      break
+    fi
+
+    # When testing the current shell, simply "eval" the test code.
+    # Otherwise, run it via $re_shell_ -c ...
+    if test "$re_shell_" = __current__; then
+      # 'eval'ing this code makes Solaris 10's /bin/sh exit with
+      # $? set to 2.  It does not evaluate any of the code after the
+      # "unexpected" first '('.  Thus, we must run it in a subshell.
+      ( eval "$gl_shell_test_script_" ) > /dev/null 2>&1
+    else
+      "$re_shell_" -c "$gl_shell_test_script_" 2>/dev/null
+    fi
+
+    st_=$?
+
+    # $re_shell_ works just fine.  Use it.
+    if test $st_ = 10; then
+      gl_set_x_corrupts_stderr_=false
+      break
+    fi
+
+    # If this is our first marginally acceptable shell, remember it.
+    if test "$st_:$marginal_" = 9: ; then
+      marginal_="$re_shell_"
+      gl_set_x_corrupts_stderr_=true
+    fi
+  done
+
+  if test "$re_shell_" != __current__; then
+    # Found a usable shell.  Preserve -v and -x.
+    case $- in
+      *v*x* | *x*v*) opts_=-vx ;;
+      *v*) opts_=-v ;;
+      *x*) opts_=-x ;;
+      *) opts_= ;;
+    esac
+    re_shell=$re_shell_
+    export re_shell
+    exec "$re_shell_" $opts_ "$0" --no-reexec "$@"
+    echo "$ME_: exec failed" 1>&2
+    exit 127
+  fi
+fi
+
+# =============================================================================
+# Ensure the shell behaves reasonably.
+
+# If this is bash, turn off all aliases.
+test -n "$BASH_VERSION" && unalias -a
+
+# Note that when supporting $EXEEXT (transparently mapping from PROG_NAME to
+# PROG_NAME.exe), we want to support hyphen-containing names like test-acos.
+# That is part of the shell-selection test above.  Why use aliases rather
+# than functions?  Because support for hyphen-containing aliases is more
+# widespread than that for hyphen-containing function names.
+test -n "$EXEEXT" && test -n "$BASH_VERSION" && shopt -s expand_aliases
+
+# =============================================================================
+# Creating a temporary directory (needed by the core test framework)
+
+# Create a temporary directory, much like mktemp -d does.
+# Written by Jim Meyering.
+#
+# Usage: mktempd_ /tmp phoey.XXXXXXXXXX
+#
+# First, try to use the mktemp program.
+# Failing that, we'll roll our own mktemp-like function:
+#  - try to get random bytes from /dev/urandom
+#  - failing that, generate output from a combination of quickly-varying
+#      sources and gzip.  Ignore non-varying gzip header, and extract
+#      "random" bits from there.
+#  - given those bits, map to file-name bytes using tr, and try to create
+#      the desired directory.
+#  - make only $MAX_TRIES_ attempts
+
+# Helper function.  Print $N pseudo-random bytes from a-zA-Z0-9.
+rand_bytes_ ()
+{
+  n_=$1
+
+  # Maybe try openssl rand -base64 $n_prime_|tr '+/=\012' abcd first?
+  # But if they have openssl, they probably have mktemp, too.
+
+  chars_=abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789
+  dev_rand_=/dev/urandom
+  if test -r "$dev_rand_"; then
+    # Note: 256-length($chars_) == 194; 3 copies of $chars_ is 186 + 8 = 194.
+    dd ibs=$n_ count=1 if=$dev_rand_ 2>/dev/null \
+      | LC_ALL=C tr -c $chars_ 01234567$chars_$chars_$chars_
+    return
+  fi
+
+  n_plus_50_=`expr $n_ + 50`
+  cmds_='date; date +%N; free; who -a; w; ps auxww; ps -ef'
+  data_=` (eval "$cmds_") 2>&1 | gzip `
+
+  # Ensure that $data_ has length at least 50+$n_
+  while :; do
+    len_=`echo "$data_"|wc -c`
+    test $n_plus_50_ -le $len_ && break;
+    data_=` (echo "$data_"; eval "$cmds_") 2>&1 | gzip `
+  done
+
+  echo "$data_" \
+    | dd bs=1 skip=50 count=$n_ 2>/dev/null \
+    | LC_ALL=C tr -c $chars_ 01234567$chars_$chars_$chars_
+}
+
+mktempd_ ()
+{
+  case $# in
+  2);;
+  *) fail_ "Usage: mktempd_ DIR TEMPLATE";;
+  esac
+
+  destdir_=$1
+  template_=$2
+
+  MAX_TRIES_=4
+
+  # Disallow any trailing slash on specified destdir:
+  # it would subvert the post-mktemp "case"-based destdir test.
+  case $destdir_ in
+  / | //) destdir_slash_=$destdir;;
+  */) fail_ "invalid destination dir: remove trailing slash(es)";;
+  *) destdir_slash_=$destdir_/;;
+  esac
+
+  case $template_ in
+  *XXXX) ;;
+  *) fail_ \
+       "invalid template: $template_ (must have a suffix of at least 4 X's)";;
+  esac
+
+  # First, try to use mktemp.
+  d=`unset TMPDIR; { mktemp -d -t -p "$destdir_" "$template_"; } 2>/dev/null` &&
+
+  # The resulting name must be in the specified directory.
+  case $d in "$destdir_slash_"*) :;; *) false;; esac &&
+
+  # It must have created the directory.
+  test -d "$d" &&
+
+  # It must have 0700 permissions.  Handle sticky "S" bits.
+  perms=`ls -dgo "$d" 2>/dev/null` &&
+  case $perms in drwx--[-S]---*) :;; *) false;; esac && {
+    echo "$d"
+    return
+  }
+
+  # If we reach this point, we'll have to create a directory manually.
+
+  # Get a copy of the template without its suffix of X's.
+  base_template_=`echo "$template_"|sed 's/XX*$//'`
+
+  # Calculate how many X's we've just removed.
+  template_length_=`echo "$template_" | wc -c`
+  nx_=`echo "$base_template_" | wc -c`
+  nx_=`expr $template_length_ - $nx_`
+
+  err_=
+  i_=1
+  while :; do
+    X_=`rand_bytes_ $nx_`
+    candidate_dir_="$destdir_slash_$base_template_$X_"
+    err_=`mkdir -m 0700 "$candidate_dir_" 2>&1` \
+      && { echo "$candidate_dir_"; return; }
+    test $MAX_TRIES_ -le $i_ && break;
+    i_=`expr $i_ + 1`
+  done
+  fail_ "$err_"
+}
+
+# =============================================================================
+# Core test framework
+
+# An arbitrary prefix to help distinguish test directories.
+testdir_prefix_ () { printf gt; }
+
+# Set up the environment for the test to run in.
+setup_ ()
+{
+  if test "$VERBOSE" = yes; then
+    # Test whether set -x may cause the selected shell to corrupt an
+    # application's stderr.  Many do, including zsh-4.3.10 and the /bin/sh
+    # from SunOS 5.11, OpenBSD 4.7 and Irix 6.5.
+    # If enabling verbose output this way would cause trouble, simply
+    # issue a warning and refrain.
+    if $gl_set_x_corrupts_stderr_; then
+      warn_ "using SHELL=$SHELL with 'set -x' corrupts stderr"
+    else
+      set -x
+    fi
+  fi
+
+  initial_cwd_=$PWD
+
+  # Create and enter the temporary directory.
+  pfx_=`testdir_prefix_`
+  test_dir_=`mktempd_ "$initial_cwd_" "$pfx_-$ME_.XXXX"` \
+    || fail_ "failed to create temporary directory in $initial_cwd_"
+  cd "$test_dir_" || fail_ "failed to cd to temporary directory"
+  # Set variables srcdir, builddir, for the convenience of the test.
+  case $srcdir in
+    /* | ?:*) ;;
+    *) srcdir="../$srcdir" ;;
+  esac
+  builddir=".."
+  export srcdir builddir
+
+  # As autoconf-generated configure scripts do, ensure that IFS
+  # is defined initially, so that saving and restoring $IFS works.
+  gl_init_sh_nl_='
+'
+  IFS=" ""	$gl_init_sh_nl_"
+
+  # This trap statement, along with a trap on 0 below, ensure that the
+  # temporary directory, $test_dir_, is removed upon exit as well as
+  # upon receipt of any of the listed signals.
+  for sig_ in 1 2 3 13 15; do
+    eval "trap 'Exit $(expr $sig_ + 128)' $sig_"
+  done
+}
+
+# This is a stub function that is run upon trap (upon regular exit and
+# interrupt).  Override it with a per-test function, e.g., to unmount
+# a partition, or to undo any other global state changes.
+cleanup_ () { :; }
+
+# Run the user-overridable cleanup_ function, remove the temporary
+# directory and exit with the incoming value of $?.
+remove_tmp_ ()
+{
+  __st=$?
+  cleanup_
+  if test "$KEEP" = yes; then
+    echo "Not removing temporary directory $test_dir_"
+  else
+    # cd out of the directory we're about to remove
+    cd "$initial_cwd_" || cd / || cd /tmp
+    chmod -R u+rwx "$test_dir_"
+    # If removal fails and exit status was to be 0, then change it to 1.
+    rm -rf "$test_dir_" || { test $__st = 0 && __st=1; }
+  fi
+  exit $__st
+}
+
+# =============================================================================
+# Prepending directories to PATH
+
+# Given a directory name, DIR, if every entry in it that matches *.exe
+# contains only the specified bytes (see the case stmt below), then print
+# a space-separated list of those names and return 0.  Otherwise, don't
+# print anything and return 1.  Naming constraints apply also to DIR.
+find_exe_basenames_ ()
+{
+  feb_dir_=$1
+  feb_fail_=0
+  feb_result_=
+  feb_sp_=
+  for feb_file_ in $feb_dir_/*.exe; do
+    # If there was no *.exe file, or there existed a file named "*.exe" that
+    # was deleted between the above glob expansion and the existence test
+    # below, just skip it.
+    test "x$feb_file_" = "x$feb_dir_/*.exe" && test ! -f "$feb_file_" \
+      && continue
+    # Exempt [.exe, since we can't create a function by that name, yet
+    # we can't invoke [ by PATH search anyways due to shell builtins.
+    test "x$feb_file_" = "x$feb_dir_/[.exe" && continue
+    case $feb_file_ in
+      *[!-a-zA-Z/0-9_.+]*) feb_fail_=1; break;;
+      *) # Remove leading file name components as well as the .exe suffix.
+         feb_file_=${feb_file_##*/}
+         feb_file_=${feb_file_%.exe}
+         feb_result_="$feb_result_$feb_sp_$feb_file_";;
+    esac
+    feb_sp_=' '
+  done
+  test $feb_fail_ = 0 && printf %s "$feb_result_"
+  return $feb_fail_
+}
+
+# Consider the files in directory, $1.
+# For each file name of the form PROG.exe, create an alias named
+# PROG that simply invokes PROG.exe, then return 0.  If any selected
+# file name or the directory name, $1, contains an unexpected character,
+# define no alias and return 1.
+create_exe_shims_ ()
+{
+  case $EXEEXT in
+    '') return 0 ;;
+    .exe) ;;
+    *) echo "$0: unexpected \$EXEEXT value: $EXEEXT" 1>&2; return 1 ;;
+  esac
+
+  base_names_=`find_exe_basenames_ $1` \
+    || { echo "$0 (exe_shim): skipping directory: $1" 1>&2; return 0; }
+
+  if test -n "$base_names_"; then
+    for base_ in $base_names_; do
+      alias "$base_"="$base_$EXEEXT"
+    done
+  fi
+
+  return 0
+}
+
+# Use this function to prepend to PATH an absolute name for each
+# specified, possibly-$initial_cwd_-relative, directory.
+path_prepend_ ()
+{
+  while test $# != 0; do
+    path_dir_=$1
+    case $path_dir_ in
+      '') fail_ "invalid path dir: '$1'";;
+      /* | ?:*) abs_path_dir_=$path_dir_;;
+      *) abs_path_dir_=$initial_cwd_/$path_dir_;;
+    esac
+    case $abs_path_dir_ in
+      *$PATH_SEPARATOR*) fail_ "invalid path dir: '$abs_path_dir_'";;
+    esac
+    PATH="$abs_path_dir_$PATH_SEPARATOR$PATH"
+
+    # Create an alias, FOO, for each FOO.exe in this directory.
+    create_exe_shims_ "$abs_path_dir_" \
+      || fail_ "something failed (above): $abs_path_dir_"
+    shift
+  done
+  export PATH
+}
+
+# =============================================================================
+# Convenience environment variables for the tests
+
+# -----------------------------------------------------------------------------
+
+# Enable glibc's malloc-perturbing option.
+# This is useful for exposing code that depends on the fact that
+# malloc-related functions often return memory that is mostly zeroed.
+# If you have the time and cycles, use valgrind to do an even better job.
+: ${MALLOC_PERTURB_=87}
+export MALLOC_PERTURB_
+
+# -----------------------------------------------------------------------------
+
+# The interpreter for Bourne-shell scripts.
+# No special standards compatibility requirements.
+# Some environments, such as Android, don't have /bin/sh.
+if test -f /bin/sh$EXEEXT; then
+  BOURNE_SHELL=/bin/sh
+else
+  BOURNE_SHELL=sh
+fi
+
+# =============================================================================
+# Convenience functions for the tests
+
+# -----------------------------------------------------------------------------
+# Return value checking
+
+# This is used to simplify checking of the return value
+# which is useful when ensuring a command fails as desired.
+# I.e., just doing `command ... &&fail=1` will not catch
+# a segfault in command for example.  With this helper you
+# instead check an explicit exit code like
+#   returns_ 1 command ... || fail
+returns_ () {
+  # Disable tracing so it doesn't interfere with stderr of the wrapped command
+  { set +x; } 2>/dev/null
+
+  local exp_exit="$1"
+  shift
+  "$@"
+  test $? -eq $exp_exit && ret_=0 || ret_=1
+
+  if test "$VERBOSE" = yes && test "$gl_set_x_corrupts_stderr_" = false; then
+    set -x
+  fi
+  { return $ret_; } 2>/dev/null
+}
+
+# -----------------------------------------------------------------------------
+# Text file comparison
+
+# Emit a header similar to that from diff -u;  Print the simulated "diff"
+# command so that the order of arguments is clear.  Don't bother with @@ lines.
+emit_diff_u_header_ ()
+{
+  printf '%s\n' "diff -u $*" \
+    "--- $1	1970-01-01" \
+    "+++ $2	1970-01-01"
+}
+
+# Arrange not to let diff or cmp operate on /dev/null,
+# since on some systems (at least OSF/1 5.1), that doesn't work.
+# When there are not two arguments, or no argument is /dev/null, return 2.
+# When one argument is /dev/null and the other is not empty,
+# cat the nonempty file to stderr and return 1.
+# Otherwise, return 0.
+compare_dev_null_ ()
+{
+  test $# = 2 || return 2
+
+  if test "x$1" = x/dev/null; then
+    test -s "$2" || return 0
+    emit_diff_u_header_ "$@"; sed 's/^/+/' "$2"
+    return 1
+  fi
+
+  if test "x$2" = x/dev/null; then
+    test -s "$1" || return 0
+    emit_diff_u_header_ "$@"; sed 's/^/-/' "$1"
+    return 1
+  fi
+
+  return 2
+}
+
+for diff_opt_ in -u -U3 -c '' no; do
+  test "$diff_opt_" != no &&
+    diff_out_=`exec 2>/dev/null; diff $diff_opt_ "$0" "$0" < /dev/null` &&
+    break
+done
+if test "$diff_opt_" != no; then
+  if test -z "$diff_out_"; then
+    compare_ () { diff $diff_opt_ "$@"; }
+  else
+    compare_ ()
+    {
+      # If no differences were found, AIX and HP-UX 'diff' produce output
+      # like "No differences encountered".  Hide this output.
+      diff $diff_opt_ "$@" > diff.out
+      diff_status_=$?
+      test $diff_status_ -eq 0 || cat diff.out || diff_status_=2
+      rm -f diff.out || diff_status_=2
+      return $diff_status_
+    }
+  fi
+elif cmp -s /dev/null /dev/null 2>/dev/null; then
+  compare_ () { cmp -s "$@"; }
+else
+  compare_ () { cmp "$@"; }
+fi
+
+# Usage: compare EXPECTED ACTUAL
+#
+# Given compare_dev_null_'s preprocessing, defer to compare_ if 2 or more.
+# Otherwise, propagate $? to caller: any diffs have already been printed.
+compare ()
+{
+  # This looks like it can be factored to use a simple "case $?"
+  # after unchecked compare_dev_null_ invocation, but that would
+  # fail in a "set -e" environment.
+  if compare_dev_null_ "$@"; then
+    return 0
+  else
+    case $? in
+      1) return 1;;
+      *) compare_ "$@";;
+    esac
+  fi
+}
+
+# -----------------------------------------------------------------------------
+
+# If you want to override the testdir_prefix_ function,
+# or to add more utility functions, use this file.
+test -f "$srcdir/init.cfg" \
+  && . "$srcdir/init.cfg"
+
+# =============================================================================
+# Set up the environment for the test to run in.
+
+setup_ "$@"
+# This trap is here, rather than in the setup_ function, because some
+# shells run the exit trap at shell function exit, rather than script exit.
+trap remove_tmp_ 0
diff --git a/src/grep/gnulib-tests/inttostr.c b/src/grep/gnulib-tests/inttostr.c
new file mode 100644
index 0000000..2fafd1c
--- /dev/null
+++ b/src/grep/gnulib-tests/inttostr.c
@@ -0,0 +1,20 @@
+/* Convert 'int' integer to printable string.
+
+   Copyright (C) 2004-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#define anytostr inttostr
+#define inttype int
+#include "anytostr.c"
diff --git a/src/grep/gnulib-tests/inttostr.h b/src/grep/gnulib-tests/inttostr.h
new file mode 100644
index 0000000..db1f8fa
--- /dev/null
+++ b/src/grep/gnulib-tests/inttostr.h
@@ -0,0 +1,29 @@
+/* inttostr.h -- convert integers to printable strings
+
+   Copyright (C) 2001-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert */
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include "intprops.h"
+
+_GL_ATTRIBUTE_NODISCARD char *imaxtostr (intmax_t, char *);
+_GL_ATTRIBUTE_NODISCARD char *inttostr (int, char *);
+_GL_ATTRIBUTE_NODISCARD char *offtostr (off_t, char *);
+_GL_ATTRIBUTE_NODISCARD char *uinttostr (unsigned int, char *);
+_GL_ATTRIBUTE_NODISCARD char *umaxtostr (uintmax_t, char *);
diff --git a/src/grep/gnulib-tests/ioctl.c b/src/grep/gnulib-tests/ioctl.c
new file mode 100644
index 0000000..ca90582
--- /dev/null
+++ b/src/grep/gnulib-tests/ioctl.c
@@ -0,0 +1,92 @@
+/* ioctl.c --- wrappers for Windows ioctl function
+
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paolo Bonzini */
+
+#include <config.h>
+
+#include <sys/ioctl.h>
+
+#include <stdarg.h>
+
+#if HAVE_IOCTL
+
+/* Provide a wrapper with the POSIX prototype.  */
+# undef ioctl
+int
+rpl_ioctl (int fd, int request, ... /* {void *,char *} arg */)
+{
+  void *buf;
+  va_list args;
+
+  va_start (args, request);
+  buf = va_arg (args, void *);
+  va_end (args);
+
+  /* Cast 'request' so that when the system's ioctl function takes a 64-bit
+     request argument, the value gets zero-extended, not sign-extended.  */
+  return ioctl (fd, (unsigned int) request, buf);
+}
+
+#else /* mingw */
+
+# include <errno.h>
+
+/* Get HANDLE.  */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+
+# include "fd-hook.h"
+/* Get _get_osfhandle.  */
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+
+static int
+primary_ioctl (int fd, int request, void *arg)
+{
+  /* We don't support FIONBIO on pipes here.  If you want to make pipe
+     fds non-blocking, use the gnulib 'nonblocking' module, until
+     gnulib implements fcntl F_GETFL / F_SETFL with O_NONBLOCK.  */
+
+  if ((HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE)
+    errno = ENOSYS;
+  else
+    errno = EBADF;
+  return -1;
+}
+
+int
+ioctl (int fd, int request, ... /* {void *,char *} arg */)
+{
+  void *arg;
+  va_list args;
+
+  va_start (args, request);
+  arg = va_arg (args, void *);
+  va_end (args);
+
+# if WINDOWS_SOCKETS
+  return execute_all_ioctl_hooks (primary_ioctl, fd, request, arg);
+# else
+  return primary_ioctl (fd, request, arg);
+# endif
+}
+
+#endif
diff --git a/src/grep/gnulib-tests/itold.c b/src/grep/gnulib-tests/itold.c
new file mode 100644
index 0000000..7984866
--- /dev/null
+++ b/src/grep/gnulib-tests/itold.c
@@ -0,0 +1,28 @@
+/* Replacement for 'int' to 'long double' conversion routine.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2011.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <float.h>
+
+void
+_Qp_itoq (long double *result, int a)
+{
+  /* Convert from 'int' to 'double', then from 'double' to 'long double'.  */
+  *result = (double) a;
+}
diff --git a/src/grep/gnulib-tests/listen.c b/src/grep/gnulib-tests/listen.c
new file mode 100644
index 0000000..a145f82
--- /dev/null
+++ b/src/grep/gnulib-tests/listen.c
@@ -0,0 +1,49 @@
+/* listen.c --- wrappers for Windows listen function
+
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paolo Bonzini */
+
+#include <config.h>
+
+#define WIN32_LEAN_AND_MEAN
+/* Get winsock2.h. */
+#include <sys/socket.h>
+
+/* Get set_winsock_errno, FD_TO_SOCKET etc. */
+#include "w32sock.h"
+
+#undef listen
+
+int
+rpl_listen (int fd, int backlog)
+{
+  SOCKET sock = FD_TO_SOCKET (fd);
+
+  if (sock == INVALID_SOCKET)
+    {
+      errno = EBADF;
+      return -1;
+    }
+  else
+    {
+      int r = listen (sock, backlog);
+      if (r < 0)
+        set_winsock_errno ();
+
+      return r;
+    }
+}
diff --git a/src/grep/gnulib-tests/locale.c b/src/grep/gnulib-tests/locale.c
new file mode 100644
index 0000000..6185c4d
--- /dev/null
+++ b/src/grep/gnulib-tests/locale.c
@@ -0,0 +1,85 @@
+/* Program that prints the names of the categories of the current locale.
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+#include <locale.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+/* We want to use the system's setlocale() function here, not the gnulib
+   override.  */
+#undef setlocale
+
+/* Specification:
+   <https://pubs.opengroup.org/onlinepubs/9699919799/utilities/locale.html>
+   Here we implement only the invocation without any command-line options.  */
+
+static const char *
+defaulted_getenv (const char *variable)
+{
+  const char *value = getenv (variable);
+  return (value != NULL ? value : "");
+}
+
+static void
+print_category (int category, const char *variable)
+{
+  const char *value = defaulted_getenv (variable);
+  if (value[0] != '\0' && defaulted_getenv ("LC_ALL")[0] == '\0')
+    /* The variable is set in the environment and not overridden by LC_ALL.  */
+    printf ("%s=%s\n", variable, value);
+  else
+    printf ("%s=\"%s\"\n", variable, setlocale (category, NULL));
+}
+
+int
+main (void)
+{
+  setlocale (LC_ALL, "");
+
+  printf ("LANG=%s\n", defaulted_getenv ("LANG"));
+  print_category (LC_CTYPE, "LC_CTYPE");
+  print_category (LC_NUMERIC, "LC_NUMERIC");
+  print_category (LC_TIME, "LC_TIME");
+  print_category (LC_COLLATE, "LC_COLLATE");
+  print_category (LC_MONETARY, "LC_MONETARY");
+  print_category (LC_MESSAGES, "LC_MESSAGES");
+#ifdef LC_PAPER
+  print_category (LC_PAPER, "LC_PAPER");
+#endif
+#ifdef LC_NAME
+  print_category (LC_NAME, "LC_NAME");
+#endif
+#ifdef LC_ADDRESS
+  print_category (LC_ADDRESS, "LC_ADDRESS");
+#endif
+#ifdef LC_TELEPHONE
+  print_category (LC_TELEPHONE, "LC_TELEPHONE");
+#endif
+#ifdef LC_MEASUREMENT
+  print_category (LC_MEASUREMENT, "LC_MEASUREMENT");
+#endif
+#ifdef LC_IDENTIFICATION
+  print_category (LC_IDENTIFICATION, "LC_IDENTIFICATION");
+#endif
+
+  printf ("LC_ALL=%s\n", defaulted_getenv ("LC_ALL"));
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/localename-table.c b/src/grep/gnulib-tests/localename-table.c
new file mode 100644
index 0000000..36c5ddc
--- /dev/null
+++ b/src/grep/gnulib-tests/localename-table.c
@@ -0,0 +1,48 @@
+/* Table that maps a locale object to the names of the locale categories.
+   Copyright (C) 2018-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation; either version 2.1 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2018.  */
+
+#include <config.h>
+
+#if HAVE_WORKING_USELOCALE && HAVE_NAMELESS_LOCALES
+
+/* Specification.  */
+#include "localename-table.h"
+
+#include <stdint.h>
+
+/* A hash function for pointers.  */
+size_t _GL_ATTRIBUTE_CONST
+locale_hash_function (locale_t x)
+{
+  uintptr_t p = (uintptr_t) x;
+  size_t h = ((p % 4177) << 12) + ((p % 79) << 6) + (p % 61);
+  return h;
+}
+
+struct locale_hash_node * locale_hash_table[LOCALE_HASH_TABLE_SIZE]
+  /* = { NULL, ..., NULL } */;
+
+gl_rwlock_define_initialized(, locale_lock)
+
+#else
+
+/* This declaration is solely to ensure that after preprocessing
+   this file is never empty.  */
+typedef int dummy;
+
+#endif
diff --git a/src/grep/gnulib-tests/localename-table.h b/src/grep/gnulib-tests/localename-table.h
new file mode 100644
index 0000000..98f5b9f
--- /dev/null
+++ b/src/grep/gnulib-tests/localename-table.h
@@ -0,0 +1,69 @@
+/* Table that maps a locale object to the names of the locale categories.
+   Copyright (C) 2018-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation; either version 2.1 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2018.  */
+
+#if HAVE_WORKING_USELOCALE && HAVE_NAMELESS_LOCALES
+
+# include <stddef.h>
+# include <locale.h>
+
+# include "glthread/lock.h"
+
+struct locale_categories_names
+  {
+    /* Locale category -> name (allocated with indefinite extent).  */
+    const char *category_name[6];
+  };
+
+/* A hash table of fixed size.  Multiple threads can access it read-only
+   simultaneously, but only one thread can insert into it or remove from it
+   at the same time.
+   This hash table has global scope, so that when an application uses both
+   GNU libintl and gnulib, the application sees only one hash table.  (When
+   linking statically with libintl, the fact that localename-table.c is a
+   separate compilation unit resolves the duplicate symbol conflict.  When
+   linking with libintl as a shared library, we rely on ELF and the symbol
+   conflict resolution implemented in the ELF dynamic loader here.)
+   Both the libintl overrides and the gnulib overrides of the functions
+   newlocale, duplocale, freelocale see the same hash table (and the same lock).
+   For this reason, the internal layout of the hash table and the hash function
+   MUST NEVER CHANGE.  If you need to change the internal layout or the hash
+   function, introduce versioning by appending a version suffix to the symbols
+   at the linker level.  */
+# define locale_hash_function libintl_locale_hash_function
+# define locale_hash_table libintl_locale_hash_table
+# define locale_lock libintl_locale_lock
+
+extern size_t _GL_ATTRIBUTE_CONST locale_hash_function (locale_t x);
+
+/* A node in a hash bucket collision list.  */
+struct locale_hash_node
+  {
+    struct locale_hash_node *next;
+    locale_t locale;
+    struct locale_categories_names names;
+  };
+
+# define LOCALE_HASH_TABLE_SIZE 101
+extern struct locale_hash_node * locale_hash_table[LOCALE_HASH_TABLE_SIZE];
+
+/* This lock protects the locale_hash_table against multiple simultaneous
+   accesses (except that multiple simultaneous read accesses are allowed).  */
+
+gl_rwlock_define(extern, locale_lock)
+
+#endif
diff --git a/src/grep/gnulib-tests/localename.c b/src/grep/gnulib-tests/localename.c
new file mode 100644
index 0000000..5ee6764
--- /dev/null
+++ b/src/grep/gnulib-tests/localename.c
@@ -0,0 +1,3451 @@
+/* Determine name of the currently selected locale.
+   Copyright (C) 1995-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation; either version 2.1 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Ulrich Drepper <drepper@gnu.org>, 1995.  */
+/* Native Windows code written by Tor Lillqvist <tml@iki.fi>.  */
+/* Mac OS X code written by Bruno Haible <bruno@clisp.org>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "localename.h"
+
+#include <limits.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <locale.h>
+#include <string.h>
+
+#include "flexmember.h"
+#include "setlocale_null.h"
+#include "thread-optim.h"
+
+#if HAVE_GOOD_USELOCALE
+/* Mac OS X 10.5 defines the locale_t type in <xlocale.h>.  */
+# if defined __APPLE__ && defined __MACH__
+#  include <xlocale.h>
+# endif
+# if (__GLIBC__ >= 2 && !defined __UCLIBC__) || (defined __linux__ && HAVE_LANGINFO_H) || defined __CYGWIN__
+#  include <langinfo.h>
+# endif
+# include "glthread/lock.h"
+# if defined __sun
+#  if HAVE_GETLOCALENAME_L
+/* Solaris >= 12.  */
+extern char * getlocalename_l(int, locale_t);
+#  elif HAVE_SOLARIS114_LOCALES
+#   include <sys/localedef.h>
+#  endif
+# endif
+# if HAVE_NAMELESS_LOCALES
+#  include "localename-table.h"
+# endif
+#endif
+
+#if HAVE_CFPREFERENCESCOPYAPPVALUE
+# include <CoreFoundation/CFString.h>
+# include <CoreFoundation/CFPreferences.h>
+#endif
+
+#if defined _WIN32 && !defined __CYGWIN__
+# define WINDOWS_NATIVE
+# include "glthread/lock.h"
+#endif
+
+#if defined WINDOWS_NATIVE || defined __CYGWIN__ /* Native Windows or Cygwin */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+# include <winnls.h>
+/* List of language codes, sorted by value:
+   0x01 LANG_ARABIC
+   0x02 LANG_BULGARIAN
+   0x03 LANG_CATALAN
+   0x04 LANG_CHINESE
+   0x05 LANG_CZECH
+   0x06 LANG_DANISH
+   0x07 LANG_GERMAN
+   0x08 LANG_GREEK
+   0x09 LANG_ENGLISH
+   0x0a LANG_SPANISH
+   0x0b LANG_FINNISH
+   0x0c LANG_FRENCH
+   0x0d LANG_HEBREW
+   0x0e LANG_HUNGARIAN
+   0x0f LANG_ICELANDIC
+   0x10 LANG_ITALIAN
+   0x11 LANG_JAPANESE
+   0x12 LANG_KOREAN
+   0x13 LANG_DUTCH
+   0x14 LANG_NORWEGIAN
+   0x15 LANG_POLISH
+   0x16 LANG_PORTUGUESE
+   0x17 LANG_ROMANSH
+   0x18 LANG_ROMANIAN
+   0x19 LANG_RUSSIAN
+   0x1a LANG_CROATIAN == LANG_SERBIAN
+   0x1b LANG_SLOVAK
+   0x1c LANG_ALBANIAN
+   0x1d LANG_SWEDISH
+   0x1e LANG_THAI
+   0x1f LANG_TURKISH
+   0x20 LANG_URDU
+   0x21 LANG_INDONESIAN
+   0x22 LANG_UKRAINIAN
+   0x23 LANG_BELARUSIAN
+   0x24 LANG_SLOVENIAN
+   0x25 LANG_ESTONIAN
+   0x26 LANG_LATVIAN
+   0x27 LANG_LITHUANIAN
+   0x28 LANG_TAJIK
+   0x29 LANG_FARSI
+   0x2a LANG_VIETNAMESE
+   0x2b LANG_ARMENIAN
+   0x2c LANG_AZERI
+   0x2d LANG_BASQUE
+   0x2e LANG_SORBIAN
+   0x2f LANG_MACEDONIAN
+   0x30 LANG_SUTU
+   0x31 LANG_TSONGA
+   0x32 LANG_TSWANA
+   0x33 LANG_VENDA
+   0x34 LANG_XHOSA
+   0x35 LANG_ZULU
+   0x36 LANG_AFRIKAANS
+   0x37 LANG_GEORGIAN
+   0x38 LANG_FAEROESE
+   0x39 LANG_HINDI
+   0x3a LANG_MALTESE
+   0x3b LANG_SAMI
+   0x3c LANG_GAELIC
+   0x3d LANG_YIDDISH
+   0x3e LANG_MALAY
+   0x3f LANG_KAZAK
+   0x40 LANG_KYRGYZ
+   0x41 LANG_SWAHILI
+   0x42 LANG_TURKMEN
+   0x43 LANG_UZBEK
+   0x44 LANG_TATAR
+   0x45 LANG_BENGALI
+   0x46 LANG_PUNJABI
+   0x47 LANG_GUJARATI
+   0x48 LANG_ORIYA
+   0x49 LANG_TAMIL
+   0x4a LANG_TELUGU
+   0x4b LANG_KANNADA
+   0x4c LANG_MALAYALAM
+   0x4d LANG_ASSAMESE
+   0x4e LANG_MARATHI
+   0x4f LANG_SANSKRIT
+   0x50 LANG_MONGOLIAN
+   0x51 LANG_TIBETAN
+   0x52 LANG_WELSH
+   0x53 LANG_CAMBODIAN
+   0x54 LANG_LAO
+   0x55 LANG_BURMESE
+   0x56 LANG_GALICIAN
+   0x57 LANG_KONKANI
+   0x58 LANG_MANIPURI
+   0x59 LANG_SINDHI
+   0x5a LANG_SYRIAC
+   0x5b LANG_SINHALESE
+   0x5c LANG_CHEROKEE
+   0x5d LANG_INUKTITUT
+   0x5e LANG_AMHARIC
+   0x5f LANG_TAMAZIGHT
+   0x60 LANG_KASHMIRI
+   0x61 LANG_NEPALI
+   0x62 LANG_FRISIAN
+   0x63 LANG_PASHTO
+   0x64 LANG_TAGALOG
+   0x65 LANG_DIVEHI
+   0x66 LANG_EDO
+   0x67 LANG_FULFULDE
+   0x68 LANG_HAUSA
+   0x69 LANG_IBIBIO
+   0x6a LANG_YORUBA
+   0x6d LANG_BASHKIR
+   0x6e LANG_LUXEMBOURGISH
+   0x6f LANG_GREENLANDIC
+   0x70 LANG_IGBO
+   0x71 LANG_KANURI
+   0x72 LANG_OROMO
+   0x73 LANG_TIGRINYA
+   0x74 LANG_GUARANI
+   0x75 LANG_HAWAIIAN
+   0x76 LANG_LATIN
+   0x77 LANG_SOMALI
+   0x78 LANG_YI
+   0x79 LANG_PAPIAMENTU
+   0x7a LANG_MAPUDUNGUN
+   0x7c LANG_MOHAWK
+   0x7e LANG_BRETON
+   0x82 LANG_OCCITAN
+   0x83 LANG_CORSICAN
+   0x84 LANG_ALSATIAN
+   0x85 LANG_YAKUT
+   0x86 LANG_KICHE
+   0x87 LANG_KINYARWANDA
+   0x88 LANG_WOLOF
+   0x8c LANG_DARI
+   0x91 LANG_SCOTTISH_GAELIC
+*/
+/* Mingw headers don't have latest language and sublanguage codes.  */
+# ifndef LANG_AFRIKAANS
+# define LANG_AFRIKAANS 0x36
+# endif
+# ifndef LANG_ALBANIAN
+# define LANG_ALBANIAN 0x1c
+# endif
+# ifndef LANG_ALSATIAN
+# define LANG_ALSATIAN 0x84
+# endif
+# ifndef LANG_AMHARIC
+# define LANG_AMHARIC 0x5e
+# endif
+# ifndef LANG_ARABIC
+# define LANG_ARABIC 0x01
+# endif
+# ifndef LANG_ARMENIAN
+# define LANG_ARMENIAN 0x2b
+# endif
+# ifndef LANG_ASSAMESE
+# define LANG_ASSAMESE 0x4d
+# endif
+# ifndef LANG_AZERI
+# define LANG_AZERI 0x2c
+# endif
+# ifndef LANG_BASHKIR
+# define LANG_BASHKIR 0x6d
+# endif
+# ifndef LANG_BASQUE
+# define LANG_BASQUE 0x2d
+# endif
+# ifndef LANG_BELARUSIAN
+# define LANG_BELARUSIAN 0x23
+# endif
+# ifndef LANG_BENGALI
+# define LANG_BENGALI 0x45
+# endif
+# ifndef LANG_BRETON
+# define LANG_BRETON 0x7e
+# endif
+# ifndef LANG_BURMESE
+# define LANG_BURMESE 0x55
+# endif
+# ifndef LANG_CAMBODIAN
+# define LANG_CAMBODIAN 0x53
+# endif
+# ifndef LANG_CATALAN
+# define LANG_CATALAN 0x03
+# endif
+# ifndef LANG_CHEROKEE
+# define LANG_CHEROKEE 0x5c
+# endif
+# ifndef LANG_CORSICAN
+# define LANG_CORSICAN 0x83
+# endif
+# ifndef LANG_DARI
+# define LANG_DARI 0x8c
+# endif
+# ifndef LANG_DIVEHI
+# define LANG_DIVEHI 0x65
+# endif
+# ifndef LANG_EDO
+# define LANG_EDO 0x66
+# endif
+# ifndef LANG_ESTONIAN
+# define LANG_ESTONIAN 0x25
+# endif
+# ifndef LANG_FAEROESE
+# define LANG_FAEROESE 0x38
+# endif
+# ifndef LANG_FARSI
+# define LANG_FARSI 0x29
+# endif
+# ifndef LANG_FRISIAN
+# define LANG_FRISIAN 0x62
+# endif
+# ifndef LANG_FULFULDE
+# define LANG_FULFULDE 0x67
+# endif
+# ifndef LANG_GAELIC
+# define LANG_GAELIC 0x3c
+# endif
+# ifndef LANG_GALICIAN
+# define LANG_GALICIAN 0x56
+# endif
+# ifndef LANG_GEORGIAN
+# define LANG_GEORGIAN 0x37
+# endif
+# ifndef LANG_GREENLANDIC
+# define LANG_GREENLANDIC 0x6f
+# endif
+# ifndef LANG_GUARANI
+# define LANG_GUARANI 0x74
+# endif
+# ifndef LANG_GUJARATI
+# define LANG_GUJARATI 0x47
+# endif
+# ifndef LANG_HAUSA
+# define LANG_HAUSA 0x68
+# endif
+# ifndef LANG_HAWAIIAN
+# define LANG_HAWAIIAN 0x75
+# endif
+# ifndef LANG_HEBREW
+# define LANG_HEBREW 0x0d
+# endif
+# ifndef LANG_HINDI
+# define LANG_HINDI 0x39
+# endif
+# ifndef LANG_IBIBIO
+# define LANG_IBIBIO 0x69
+# endif
+# ifndef LANG_IGBO
+# define LANG_IGBO 0x70
+# endif
+# ifndef LANG_INDONESIAN
+# define LANG_INDONESIAN 0x21
+# endif
+# ifndef LANG_INUKTITUT
+# define LANG_INUKTITUT 0x5d
+# endif
+# ifndef LANG_KANNADA
+# define LANG_KANNADA 0x4b
+# endif
+# ifndef LANG_KANURI
+# define LANG_KANURI 0x71
+# endif
+# ifndef LANG_KASHMIRI
+# define LANG_KASHMIRI 0x60
+# endif
+# ifndef LANG_KAZAK
+# define LANG_KAZAK 0x3f
+# endif
+# ifndef LANG_KICHE
+# define LANG_KICHE 0x86
+# endif
+# ifndef LANG_KINYARWANDA
+# define LANG_KINYARWANDA 0x87
+# endif
+# ifndef LANG_KONKANI
+# define LANG_KONKANI 0x57
+# endif
+# ifndef LANG_KYRGYZ
+# define LANG_KYRGYZ 0x40
+# endif
+# ifndef LANG_LAO
+# define LANG_LAO 0x54
+# endif
+# ifndef LANG_LATIN
+# define LANG_LATIN 0x76
+# endif
+# ifndef LANG_LATVIAN
+# define LANG_LATVIAN 0x26
+# endif
+# ifndef LANG_LITHUANIAN
+# define LANG_LITHUANIAN 0x27
+# endif
+# ifndef LANG_LUXEMBOURGISH
+# define LANG_LUXEMBOURGISH 0x6e
+# endif
+# ifndef LANG_MACEDONIAN
+# define LANG_MACEDONIAN 0x2f
+# endif
+# ifndef LANG_MALAY
+# define LANG_MALAY 0x3e
+# endif
+# ifndef LANG_MALAYALAM
+# define LANG_MALAYALAM 0x4c
+# endif
+# ifndef LANG_MALTESE
+# define LANG_MALTESE 0x3a
+# endif
+# ifndef LANG_MANIPURI
+# define LANG_MANIPURI 0x58
+# endif
+# ifndef LANG_MAORI
+# define LANG_MAORI 0x81
+# endif
+# ifndef LANG_MAPUDUNGUN
+# define LANG_MAPUDUNGUN 0x7a
+# endif
+# ifndef LANG_MARATHI
+# define LANG_MARATHI 0x4e
+# endif
+# ifndef LANG_MOHAWK
+# define LANG_MOHAWK 0x7c
+# endif
+# ifndef LANG_MONGOLIAN
+# define LANG_MONGOLIAN 0x50
+# endif
+# ifndef LANG_NEPALI
+# define LANG_NEPALI 0x61
+# endif
+# ifndef LANG_OCCITAN
+# define LANG_OCCITAN 0x82
+# endif
+# ifndef LANG_ORIYA
+# define LANG_ORIYA 0x48
+# endif
+# ifndef LANG_OROMO
+# define LANG_OROMO 0x72
+# endif
+# ifndef LANG_PAPIAMENTU
+# define LANG_PAPIAMENTU 0x79
+# endif
+# ifndef LANG_PASHTO
+# define LANG_PASHTO 0x63
+# endif
+# ifndef LANG_PUNJABI
+# define LANG_PUNJABI 0x46
+# endif
+# ifndef LANG_QUECHUA
+# define LANG_QUECHUA 0x6b
+# endif
+# ifndef LANG_ROMANSH
+# define LANG_ROMANSH 0x17
+# endif
+# ifndef LANG_SAMI
+# define LANG_SAMI 0x3b
+# endif
+# ifndef LANG_SANSKRIT
+# define LANG_SANSKRIT 0x4f
+# endif
+# ifndef LANG_SCOTTISH_GAELIC
+# define LANG_SCOTTISH_GAELIC 0x91
+# endif
+# ifndef LANG_SERBIAN
+# define LANG_SERBIAN 0x1a
+# endif
+# ifndef LANG_SINDHI
+# define LANG_SINDHI 0x59
+# endif
+# ifndef LANG_SINHALESE
+# define LANG_SINHALESE 0x5b
+# endif
+# ifndef LANG_SLOVAK
+# define LANG_SLOVAK 0x1b
+# endif
+# ifndef LANG_SOMALI
+# define LANG_SOMALI 0x77
+# endif
+# ifndef LANG_SORBIAN
+# define LANG_SORBIAN 0x2e
+# endif
+# ifndef LANG_SOTHO
+# define LANG_SOTHO 0x6c
+# endif
+# ifndef LANG_SUTU
+# define LANG_SUTU 0x30
+# endif
+# ifndef LANG_SWAHILI
+# define LANG_SWAHILI 0x41
+# endif
+# ifndef LANG_SYRIAC
+# define LANG_SYRIAC 0x5a
+# endif
+# ifndef LANG_TAGALOG
+# define LANG_TAGALOG 0x64
+# endif
+# ifndef LANG_TAJIK
+# define LANG_TAJIK 0x28
+# endif
+# ifndef LANG_TAMAZIGHT
+# define LANG_TAMAZIGHT 0x5f
+# endif
+# ifndef LANG_TAMIL
+# define LANG_TAMIL 0x49
+# endif
+# ifndef LANG_TATAR
+# define LANG_TATAR 0x44
+# endif
+# ifndef LANG_TELUGU
+# define LANG_TELUGU 0x4a
+# endif
+# ifndef LANG_THAI
+# define LANG_THAI 0x1e
+# endif
+# ifndef LANG_TIBETAN
+# define LANG_TIBETAN 0x51
+# endif
+# ifndef LANG_TIGRINYA
+# define LANG_TIGRINYA 0x73
+# endif
+# ifndef LANG_TSONGA
+# define LANG_TSONGA 0x31
+# endif
+# ifndef LANG_TSWANA
+# define LANG_TSWANA 0x32
+# endif
+# ifndef LANG_TURKMEN
+# define LANG_TURKMEN 0x42
+# endif
+# ifndef LANG_UIGHUR
+# define LANG_UIGHUR 0x80
+# endif
+# ifndef LANG_UKRAINIAN
+# define LANG_UKRAINIAN 0x22
+# endif
+# ifndef LANG_URDU
+# define LANG_URDU 0x20
+# endif
+# ifndef LANG_UZBEK
+# define LANG_UZBEK 0x43
+# endif
+# ifndef LANG_VENDA
+# define LANG_VENDA 0x33
+# endif
+# ifndef LANG_VIETNAMESE
+# define LANG_VIETNAMESE 0x2a
+# endif
+# ifndef LANG_WELSH
+# define LANG_WELSH 0x52
+# endif
+# ifndef LANG_WOLOF
+# define LANG_WOLOF 0x88
+# endif
+# ifndef LANG_XHOSA
+# define LANG_XHOSA 0x34
+# endif
+# ifndef LANG_YAKUT
+# define LANG_YAKUT 0x85
+# endif
+# ifndef LANG_YI
+# define LANG_YI 0x78
+# endif
+# ifndef LANG_YIDDISH
+# define LANG_YIDDISH 0x3d
+# endif
+# ifndef LANG_YORUBA
+# define LANG_YORUBA 0x6a
+# endif
+# ifndef LANG_ZULU
+# define LANG_ZULU 0x35
+# endif
+# ifndef SUBLANG_AFRIKAANS_SOUTH_AFRICA
+# define SUBLANG_AFRIKAANS_SOUTH_AFRICA 0x01
+# endif
+# ifndef SUBLANG_ALBANIAN_ALBANIA
+# define SUBLANG_ALBANIAN_ALBANIA 0x01
+# endif
+# ifndef SUBLANG_ALSATIAN_FRANCE
+# define SUBLANG_ALSATIAN_FRANCE 0x01
+# endif
+# ifndef SUBLANG_AMHARIC_ETHIOPIA
+# define SUBLANG_AMHARIC_ETHIOPIA 0x01
+# endif
+# ifndef SUBLANG_ARABIC_SAUDI_ARABIA
+# define SUBLANG_ARABIC_SAUDI_ARABIA 0x01
+# endif
+# ifndef SUBLANG_ARABIC_IRAQ
+# define SUBLANG_ARABIC_IRAQ 0x02
+# endif
+# ifndef SUBLANG_ARABIC_EGYPT
+# define SUBLANG_ARABIC_EGYPT 0x03
+# endif
+# ifndef SUBLANG_ARABIC_LIBYA
+# define SUBLANG_ARABIC_LIBYA 0x04
+# endif
+# ifndef SUBLANG_ARABIC_ALGERIA
+# define SUBLANG_ARABIC_ALGERIA 0x05
+# endif
+# ifndef SUBLANG_ARABIC_MOROCCO
+# define SUBLANG_ARABIC_MOROCCO 0x06
+# endif
+# ifndef SUBLANG_ARABIC_TUNISIA
+# define SUBLANG_ARABIC_TUNISIA 0x07
+# endif
+# ifndef SUBLANG_ARABIC_OMAN
+# define SUBLANG_ARABIC_OMAN 0x08
+# endif
+# ifndef SUBLANG_ARABIC_YEMEN
+# define SUBLANG_ARABIC_YEMEN 0x09
+# endif
+# ifndef SUBLANG_ARABIC_SYRIA
+# define SUBLANG_ARABIC_SYRIA 0x0a
+# endif
+# ifndef SUBLANG_ARABIC_JORDAN
+# define SUBLANG_ARABIC_JORDAN 0x0b
+# endif
+# ifndef SUBLANG_ARABIC_LEBANON
+# define SUBLANG_ARABIC_LEBANON 0x0c
+# endif
+# ifndef SUBLANG_ARABIC_KUWAIT
+# define SUBLANG_ARABIC_KUWAIT 0x0d
+# endif
+# ifndef SUBLANG_ARABIC_UAE
+# define SUBLANG_ARABIC_UAE 0x0e
+# endif
+# ifndef SUBLANG_ARABIC_BAHRAIN
+# define SUBLANG_ARABIC_BAHRAIN 0x0f
+# endif
+# ifndef SUBLANG_ARABIC_QATAR
+# define SUBLANG_ARABIC_QATAR 0x10
+# endif
+# ifndef SUBLANG_ARMENIAN_ARMENIA
+# define SUBLANG_ARMENIAN_ARMENIA 0x01
+# endif
+# ifndef SUBLANG_ASSAMESE_INDIA
+# define SUBLANG_ASSAMESE_INDIA 0x01
+# endif
+# ifndef SUBLANG_AZERI_LATIN
+# define SUBLANG_AZERI_LATIN 0x01
+# endif
+# ifndef SUBLANG_AZERI_CYRILLIC
+# define SUBLANG_AZERI_CYRILLIC 0x02
+# endif
+# ifndef SUBLANG_BASHKIR_RUSSIA
+# define SUBLANG_BASHKIR_RUSSIA 0x01
+# endif
+# ifndef SUBLANG_BASQUE_BASQUE
+# define SUBLANG_BASQUE_BASQUE 0x01
+# endif
+# ifndef SUBLANG_BELARUSIAN_BELARUS
+# define SUBLANG_BELARUSIAN_BELARUS 0x01
+# endif
+# ifndef SUBLANG_BENGALI_INDIA
+# define SUBLANG_BENGALI_INDIA 0x01
+# endif
+# ifndef SUBLANG_BENGALI_BANGLADESH
+# define SUBLANG_BENGALI_BANGLADESH 0x02
+# endif
+# ifndef SUBLANG_BOSNIAN_BOSNIA_HERZEGOVINA_LATIN
+# define SUBLANG_BOSNIAN_BOSNIA_HERZEGOVINA_LATIN 0x05
+# endif
+# ifndef SUBLANG_BOSNIAN_BOSNIA_HERZEGOVINA_CYRILLIC
+# define SUBLANG_BOSNIAN_BOSNIA_HERZEGOVINA_CYRILLIC 0x08
+# endif
+# ifndef SUBLANG_BRETON_FRANCE
+# define SUBLANG_BRETON_FRANCE 0x01
+# endif
+# ifndef SUBLANG_BULGARIAN_BULGARIA
+# define SUBLANG_BULGARIAN_BULGARIA 0x01
+# endif
+# ifndef SUBLANG_CAMBODIAN_CAMBODIA
+# define SUBLANG_CAMBODIAN_CAMBODIA 0x01
+# endif
+# ifndef SUBLANG_CATALAN_SPAIN
+# define SUBLANG_CATALAN_SPAIN 0x01
+# endif
+# ifndef SUBLANG_CORSICAN_FRANCE
+# define SUBLANG_CORSICAN_FRANCE 0x01
+# endif
+# ifndef SUBLANG_CROATIAN_CROATIA
+# define SUBLANG_CROATIAN_CROATIA 0x01
+# endif
+# ifndef SUBLANG_CROATIAN_BOSNIA_HERZEGOVINA_LATIN
+# define SUBLANG_CROATIAN_BOSNIA_HERZEGOVINA_LATIN 0x04
+# endif
+# ifndef SUBLANG_CHINESE_MACAU
+# define SUBLANG_CHINESE_MACAU 0x05
+# endif
+# ifndef SUBLANG_CZECH_CZECH_REPUBLIC
+# define SUBLANG_CZECH_CZECH_REPUBLIC 0x01
+# endif
+# ifndef SUBLANG_DANISH_DENMARK
+# define SUBLANG_DANISH_DENMARK 0x01
+# endif
+# ifndef SUBLANG_DARI_AFGHANISTAN
+# define SUBLANG_DARI_AFGHANISTAN 0x01
+# endif
+# ifndef SUBLANG_DIVEHI_MALDIVES
+# define SUBLANG_DIVEHI_MALDIVES 0x01
+# endif
+# ifndef SUBLANG_DUTCH_SURINAM
+# define SUBLANG_DUTCH_SURINAM 0x03
+# endif
+# ifndef SUBLANG_ENGLISH_SOUTH_AFRICA
+# define SUBLANG_ENGLISH_SOUTH_AFRICA 0x07
+# endif
+# ifndef SUBLANG_ENGLISH_JAMAICA
+# define SUBLANG_ENGLISH_JAMAICA 0x08
+# endif
+# ifndef SUBLANG_ENGLISH_CARIBBEAN
+# define SUBLANG_ENGLISH_CARIBBEAN 0x09
+# endif
+# ifndef SUBLANG_ENGLISH_BELIZE
+# define SUBLANG_ENGLISH_BELIZE 0x0a
+# endif
+# ifndef SUBLANG_ENGLISH_TRINIDAD
+# define SUBLANG_ENGLISH_TRINIDAD 0x0b
+# endif
+# ifndef SUBLANG_ENGLISH_ZIMBABWE
+# define SUBLANG_ENGLISH_ZIMBABWE 0x0c
+# endif
+# ifndef SUBLANG_ENGLISH_PHILIPPINES
+# define SUBLANG_ENGLISH_PHILIPPINES 0x0d
+# endif
+# ifndef SUBLANG_ENGLISH_INDONESIA
+# define SUBLANG_ENGLISH_INDONESIA 0x0e
+# endif
+# ifndef SUBLANG_ENGLISH_HONGKONG
+# define SUBLANG_ENGLISH_HONGKONG 0x0f
+# endif
+# ifndef SUBLANG_ENGLISH_INDIA
+# define SUBLANG_ENGLISH_INDIA 0x10
+# endif
+# ifndef SUBLANG_ENGLISH_MALAYSIA
+# define SUBLANG_ENGLISH_MALAYSIA 0x11
+# endif
+# ifndef SUBLANG_ENGLISH_SINGAPORE
+# define SUBLANG_ENGLISH_SINGAPORE 0x12
+# endif
+# ifndef SUBLANG_ESTONIAN_ESTONIA
+# define SUBLANG_ESTONIAN_ESTONIA 0x01
+# endif
+# ifndef SUBLANG_FAEROESE_FAROE_ISLANDS
+# define SUBLANG_FAEROESE_FAROE_ISLANDS 0x01
+# endif
+# ifndef SUBLANG_FARSI_IRAN
+# define SUBLANG_FARSI_IRAN 0x01
+# endif
+# ifndef SUBLANG_FINNISH_FINLAND
+# define SUBLANG_FINNISH_FINLAND 0x01
+# endif
+# ifndef SUBLANG_FRENCH_LUXEMBOURG
+# define SUBLANG_FRENCH_LUXEMBOURG 0x05
+# endif
+# ifndef SUBLANG_FRENCH_MONACO
+# define SUBLANG_FRENCH_MONACO 0x06
+# endif
+# ifndef SUBLANG_FRENCH_WESTINDIES
+# define SUBLANG_FRENCH_WESTINDIES 0x07
+# endif
+# ifndef SUBLANG_FRENCH_REUNION
+# define SUBLANG_FRENCH_REUNION 0x08
+# endif
+# ifndef SUBLANG_FRENCH_CONGO
+# define SUBLANG_FRENCH_CONGO 0x09
+# endif
+# ifndef SUBLANG_FRENCH_SENEGAL
+# define SUBLANG_FRENCH_SENEGAL 0x0a
+# endif
+# ifndef SUBLANG_FRENCH_CAMEROON
+# define SUBLANG_FRENCH_CAMEROON 0x0b
+# endif
+# ifndef SUBLANG_FRENCH_COTEDIVOIRE
+# define SUBLANG_FRENCH_COTEDIVOIRE 0x0c
+# endif
+# ifndef SUBLANG_FRENCH_MALI
+# define SUBLANG_FRENCH_MALI 0x0d
+# endif
+# ifndef SUBLANG_FRENCH_MOROCCO
+# define SUBLANG_FRENCH_MOROCCO 0x0e
+# endif
+# ifndef SUBLANG_FRENCH_HAITI
+# define SUBLANG_FRENCH_HAITI 0x0f
+# endif
+# ifndef SUBLANG_FRISIAN_NETHERLANDS
+# define SUBLANG_FRISIAN_NETHERLANDS 0x01
+# endif
+# ifndef SUBLANG_GALICIAN_SPAIN
+# define SUBLANG_GALICIAN_SPAIN 0x01
+# endif
+# ifndef SUBLANG_GEORGIAN_GEORGIA
+# define SUBLANG_GEORGIAN_GEORGIA 0x01
+# endif
+# ifndef SUBLANG_GERMAN_LUXEMBOURG
+# define SUBLANG_GERMAN_LUXEMBOURG 0x04
+# endif
+# ifndef SUBLANG_GERMAN_LIECHTENSTEIN
+# define SUBLANG_GERMAN_LIECHTENSTEIN 0x05
+# endif
+# ifndef SUBLANG_GREEK_GREECE
+# define SUBLANG_GREEK_GREECE 0x01
+# endif
+# ifndef SUBLANG_GREENLANDIC_GREENLAND
+# define SUBLANG_GREENLANDIC_GREENLAND 0x01
+# endif
+# ifndef SUBLANG_GUJARATI_INDIA
+# define SUBLANG_GUJARATI_INDIA 0x01
+# endif
+# ifndef SUBLANG_HAUSA_NIGERIA_LATIN
+# define SUBLANG_HAUSA_NIGERIA_LATIN 0x01
+# endif
+# ifndef SUBLANG_HEBREW_ISRAEL
+# define SUBLANG_HEBREW_ISRAEL 0x01
+# endif
+# ifndef SUBLANG_HINDI_INDIA
+# define SUBLANG_HINDI_INDIA 0x01
+# endif
+# ifndef SUBLANG_HUNGARIAN_HUNGARY
+# define SUBLANG_HUNGARIAN_HUNGARY 0x01
+# endif
+# ifndef SUBLANG_ICELANDIC_ICELAND
+# define SUBLANG_ICELANDIC_ICELAND 0x01
+# endif
+# ifndef SUBLANG_IGBO_NIGERIA
+# define SUBLANG_IGBO_NIGERIA 0x01
+# endif
+# ifndef SUBLANG_INDONESIAN_INDONESIA
+# define SUBLANG_INDONESIAN_INDONESIA 0x01
+# endif
+# ifndef SUBLANG_INUKTITUT_CANADA
+# define SUBLANG_INUKTITUT_CANADA 0x01
+# endif
+# undef SUBLANG_INUKTITUT_CANADA_LATIN
+# define SUBLANG_INUKTITUT_CANADA_LATIN 0x02
+# undef SUBLANG_IRISH_IRELAND
+# define SUBLANG_IRISH_IRELAND 0x02
+# ifndef SUBLANG_JAPANESE_JAPAN
+# define SUBLANG_JAPANESE_JAPAN 0x01
+# endif
+# ifndef SUBLANG_KANNADA_INDIA
+# define SUBLANG_KANNADA_INDIA 0x01
+# endif
+# ifndef SUBLANG_KASHMIRI_INDIA
+# define SUBLANG_KASHMIRI_INDIA 0x02
+# endif
+# ifndef SUBLANG_KAZAK_KAZAKHSTAN
+# define SUBLANG_KAZAK_KAZAKHSTAN 0x01
+# endif
+# ifndef SUBLANG_KICHE_GUATEMALA
+# define SUBLANG_KICHE_GUATEMALA 0x01
+# endif
+# ifndef SUBLANG_KINYARWANDA_RWANDA
+# define SUBLANG_KINYARWANDA_RWANDA 0x01
+# endif
+# ifndef SUBLANG_KONKANI_INDIA
+# define SUBLANG_KONKANI_INDIA 0x01
+# endif
+# ifndef SUBLANG_KYRGYZ_KYRGYZSTAN
+# define SUBLANG_KYRGYZ_KYRGYZSTAN 0x01
+# endif
+# ifndef SUBLANG_LAO_LAOS
+# define SUBLANG_LAO_LAOS 0x01
+# endif
+# ifndef SUBLANG_LATVIAN_LATVIA
+# define SUBLANG_LATVIAN_LATVIA 0x01
+# endif
+# ifndef SUBLANG_LITHUANIAN_LITHUANIA
+# define SUBLANG_LITHUANIAN_LITHUANIA 0x01
+# endif
+# undef SUBLANG_LOWER_SORBIAN_GERMANY
+# define SUBLANG_LOWER_SORBIAN_GERMANY 0x02
+# ifndef SUBLANG_LUXEMBOURGISH_LUXEMBOURG
+# define SUBLANG_LUXEMBOURGISH_LUXEMBOURG 0x01
+# endif
+# ifndef SUBLANG_MACEDONIAN_MACEDONIA
+# define SUBLANG_MACEDONIAN_MACEDONIA 0x01
+# endif
+# ifndef SUBLANG_MALAY_MALAYSIA
+# define SUBLANG_MALAY_MALAYSIA 0x01
+# endif
+# ifndef SUBLANG_MALAY_BRUNEI_DARUSSALAM
+# define SUBLANG_MALAY_BRUNEI_DARUSSALAM 0x02
+# endif
+# ifndef SUBLANG_MALAYALAM_INDIA
+# define SUBLANG_MALAYALAM_INDIA 0x01
+# endif
+# ifndef SUBLANG_MALTESE_MALTA
+# define SUBLANG_MALTESE_MALTA 0x01
+# endif
+# ifndef SUBLANG_MAORI_NEW_ZEALAND
+# define SUBLANG_MAORI_NEW_ZEALAND 0x01
+# endif
+# ifndef SUBLANG_MAPUDUNGUN_CHILE
+# define SUBLANG_MAPUDUNGUN_CHILE 0x01
+# endif
+# ifndef SUBLANG_MARATHI_INDIA
+# define SUBLANG_MARATHI_INDIA 0x01
+# endif
+# ifndef SUBLANG_MOHAWK_CANADA
+# define SUBLANG_MOHAWK_CANADA 0x01
+# endif
+# ifndef SUBLANG_MONGOLIAN_CYRILLIC_MONGOLIA
+# define SUBLANG_MONGOLIAN_CYRILLIC_MONGOLIA 0x01
+# endif
+# ifndef SUBLANG_MONGOLIAN_PRC
+# define SUBLANG_MONGOLIAN_PRC 0x02
+# endif
+# ifndef SUBLANG_NEPALI_NEPAL
+# define SUBLANG_NEPALI_NEPAL 0x01
+# endif
+# ifndef SUBLANG_NEPALI_INDIA
+# define SUBLANG_NEPALI_INDIA 0x02
+# endif
+# ifndef SUBLANG_OCCITAN_FRANCE
+# define SUBLANG_OCCITAN_FRANCE 0x01
+# endif
+# ifndef SUBLANG_ORIYA_INDIA
+# define SUBLANG_ORIYA_INDIA 0x01
+# endif
+# ifndef SUBLANG_PASHTO_AFGHANISTAN
+# define SUBLANG_PASHTO_AFGHANISTAN 0x01
+# endif
+# ifndef SUBLANG_POLISH_POLAND
+# define SUBLANG_POLISH_POLAND 0x01
+# endif
+# ifndef SUBLANG_PUNJABI_INDIA
+# define SUBLANG_PUNJABI_INDIA 0x01
+# endif
+# ifndef SUBLANG_PUNJABI_PAKISTAN
+# define SUBLANG_PUNJABI_PAKISTAN 0x02
+# endif
+# ifndef SUBLANG_QUECHUA_BOLIVIA
+# define SUBLANG_QUECHUA_BOLIVIA 0x01
+# endif
+# ifndef SUBLANG_QUECHUA_ECUADOR
+# define SUBLANG_QUECHUA_ECUADOR 0x02
+# endif
+# ifndef SUBLANG_QUECHUA_PERU
+# define SUBLANG_QUECHUA_PERU 0x03
+# endif
+# ifndef SUBLANG_ROMANIAN_ROMANIA
+# define SUBLANG_ROMANIAN_ROMANIA 0x01
+# endif
+# ifndef SUBLANG_ROMANIAN_MOLDOVA
+# define SUBLANG_ROMANIAN_MOLDOVA 0x02
+# endif
+# ifndef SUBLANG_ROMANSH_SWITZERLAND
+# define SUBLANG_ROMANSH_SWITZERLAND 0x01
+# endif
+# ifndef SUBLANG_RUSSIAN_RUSSIA
+# define SUBLANG_RUSSIAN_RUSSIA 0x01
+# endif
+# ifndef SUBLANG_RUSSIAN_MOLDAVIA
+# define SUBLANG_RUSSIAN_MOLDAVIA 0x02
+# endif
+# ifndef SUBLANG_SAMI_NORTHERN_NORWAY
+# define SUBLANG_SAMI_NORTHERN_NORWAY 0x01
+# endif
+# ifndef SUBLANG_SAMI_NORTHERN_SWEDEN
+# define SUBLANG_SAMI_NORTHERN_SWEDEN 0x02
+# endif
+# ifndef SUBLANG_SAMI_NORTHERN_FINLAND
+# define SUBLANG_SAMI_NORTHERN_FINLAND 0x03
+# endif
+# ifndef SUBLANG_SAMI_LULE_NORWAY
+# define SUBLANG_SAMI_LULE_NORWAY 0x04
+# endif
+# ifndef SUBLANG_SAMI_LULE_SWEDEN
+# define SUBLANG_SAMI_LULE_SWEDEN 0x05
+# endif
+# ifndef SUBLANG_SAMI_SOUTHERN_NORWAY
+# define SUBLANG_SAMI_SOUTHERN_NORWAY 0x06
+# endif
+# ifndef SUBLANG_SAMI_SOUTHERN_SWEDEN
+# define SUBLANG_SAMI_SOUTHERN_SWEDEN 0x07
+# endif
+# undef SUBLANG_SAMI_SKOLT_FINLAND
+# define SUBLANG_SAMI_SKOLT_FINLAND 0x08
+# undef SUBLANG_SAMI_INARI_FINLAND
+# define SUBLANG_SAMI_INARI_FINLAND 0x09
+# ifndef SUBLANG_SANSKRIT_INDIA
+# define SUBLANG_SANSKRIT_INDIA 0x01
+# endif
+# ifndef SUBLANG_SERBIAN_LATIN
+# define SUBLANG_SERBIAN_LATIN 0x02
+# endif
+# ifndef SUBLANG_SERBIAN_CYRILLIC
+# define SUBLANG_SERBIAN_CYRILLIC 0x03
+# endif
+# ifndef SUBLANG_SINDHI_INDIA
+# define SUBLANG_SINDHI_INDIA 0x01
+# endif
+# undef SUBLANG_SINDHI_PAKISTAN
+# define SUBLANG_SINDHI_PAKISTAN 0x02
+# ifndef SUBLANG_SINDHI_AFGHANISTAN
+# define SUBLANG_SINDHI_AFGHANISTAN 0x02
+# endif
+# ifndef SUBLANG_SINHALESE_SRI_LANKA
+# define SUBLANG_SINHALESE_SRI_LANKA 0x01
+# endif
+# ifndef SUBLANG_SLOVAK_SLOVAKIA
+# define SUBLANG_SLOVAK_SLOVAKIA 0x01
+# endif
+# ifndef SUBLANG_SLOVENIAN_SLOVENIA
+# define SUBLANG_SLOVENIAN_SLOVENIA 0x01
+# endif
+# ifndef SUBLANG_SOTHO_SOUTH_AFRICA
+# define SUBLANG_SOTHO_SOUTH_AFRICA 0x01
+# endif
+# ifndef SUBLANG_SPANISH_GUATEMALA
+# define SUBLANG_SPANISH_GUATEMALA 0x04
+# endif
+# ifndef SUBLANG_SPANISH_COSTA_RICA
+# define SUBLANG_SPANISH_COSTA_RICA 0x05
+# endif
+# ifndef SUBLANG_SPANISH_PANAMA
+# define SUBLANG_SPANISH_PANAMA 0x06
+# endif
+# ifndef SUBLANG_SPANISH_DOMINICAN_REPUBLIC
+# define SUBLANG_SPANISH_DOMINICAN_REPUBLIC 0x07
+# endif
+# ifndef SUBLANG_SPANISH_VENEZUELA
+# define SUBLANG_SPANISH_VENEZUELA 0x08
+# endif
+# ifndef SUBLANG_SPANISH_COLOMBIA
+# define SUBLANG_SPANISH_COLOMBIA 0x09
+# endif
+# ifndef SUBLANG_SPANISH_PERU
+# define SUBLANG_SPANISH_PERU 0x0a
+# endif
+# ifndef SUBLANG_SPANISH_ARGENTINA
+# define SUBLANG_SPANISH_ARGENTINA 0x0b
+# endif
+# ifndef SUBLANG_SPANISH_ECUADOR
+# define SUBLANG_SPANISH_ECUADOR 0x0c
+# endif
+# ifndef SUBLANG_SPANISH_CHILE
+# define SUBLANG_SPANISH_CHILE 0x0d
+# endif
+# ifndef SUBLANG_SPANISH_URUGUAY
+# define SUBLANG_SPANISH_URUGUAY 0x0e
+# endif
+# ifndef SUBLANG_SPANISH_PARAGUAY
+# define SUBLANG_SPANISH_PARAGUAY 0x0f
+# endif
+# ifndef SUBLANG_SPANISH_BOLIVIA
+# define SUBLANG_SPANISH_BOLIVIA 0x10
+# endif
+# ifndef SUBLANG_SPANISH_EL_SALVADOR
+# define SUBLANG_SPANISH_EL_SALVADOR 0x11
+# endif
+# ifndef SUBLANG_SPANISH_HONDURAS
+# define SUBLANG_SPANISH_HONDURAS 0x12
+# endif
+# ifndef SUBLANG_SPANISH_NICARAGUA
+# define SUBLANG_SPANISH_NICARAGUA 0x13
+# endif
+# ifndef SUBLANG_SPANISH_PUERTO_RICO
+# define SUBLANG_SPANISH_PUERTO_RICO 0x14
+# endif
+# ifndef SUBLANG_SPANISH_US
+# define SUBLANG_SPANISH_US 0x15
+# endif
+# ifndef SUBLANG_SWAHILI_KENYA
+# define SUBLANG_SWAHILI_KENYA 0x01
+# endif
+# ifndef SUBLANG_SWEDISH_SWEDEN
+# define SUBLANG_SWEDISH_SWEDEN 0x01
+# endif
+# ifndef SUBLANG_SWEDISH_FINLAND
+# define SUBLANG_SWEDISH_FINLAND 0x02
+# endif
+# ifndef SUBLANG_SYRIAC_SYRIA
+# define SUBLANG_SYRIAC_SYRIA 0x01
+# endif
+# ifndef SUBLANG_TAGALOG_PHILIPPINES
+# define SUBLANG_TAGALOG_PHILIPPINES 0x01
+# endif
+# ifndef SUBLANG_TAJIK_TAJIKISTAN
+# define SUBLANG_TAJIK_TAJIKISTAN 0x01
+# endif
+# ifndef SUBLANG_TAMAZIGHT_ARABIC
+# define SUBLANG_TAMAZIGHT_ARABIC 0x01
+# endif
+# ifndef SUBLANG_TAMAZIGHT_ALGERIA_LATIN
+# define SUBLANG_TAMAZIGHT_ALGERIA_LATIN 0x02
+# endif
+# ifndef SUBLANG_TAMIL_INDIA
+# define SUBLANG_TAMIL_INDIA 0x01
+# endif
+# ifndef SUBLANG_TATAR_RUSSIA
+# define SUBLANG_TATAR_RUSSIA 0x01
+# endif
+# ifndef SUBLANG_TELUGU_INDIA
+# define SUBLANG_TELUGU_INDIA 0x01
+# endif
+# ifndef SUBLANG_THAI_THAILAND
+# define SUBLANG_THAI_THAILAND 0x01
+# endif
+# ifndef SUBLANG_TIBETAN_PRC
+# define SUBLANG_TIBETAN_PRC 0x01
+# endif
+# undef SUBLANG_TIBETAN_BHUTAN
+# define SUBLANG_TIBETAN_BHUTAN 0x02
+# ifndef SUBLANG_TIGRINYA_ETHIOPIA
+# define SUBLANG_TIGRINYA_ETHIOPIA 0x01
+# endif
+# ifndef SUBLANG_TIGRINYA_ERITREA
+# define SUBLANG_TIGRINYA_ERITREA 0x02
+# endif
+# ifndef SUBLANG_TSWANA_SOUTH_AFRICA
+# define SUBLANG_TSWANA_SOUTH_AFRICA 0x01
+# endif
+# ifndef SUBLANG_TURKISH_TURKEY
+# define SUBLANG_TURKISH_TURKEY 0x01
+# endif
+# ifndef SUBLANG_TURKMEN_TURKMENISTAN
+# define SUBLANG_TURKMEN_TURKMENISTAN 0x01
+# endif
+# ifndef SUBLANG_UIGHUR_PRC
+# define SUBLANG_UIGHUR_PRC 0x01
+# endif
+# ifndef SUBLANG_UKRAINIAN_UKRAINE
+# define SUBLANG_UKRAINIAN_UKRAINE 0x01
+# endif
+# ifndef SUBLANG_UPPER_SORBIAN_GERMANY
+# define SUBLANG_UPPER_SORBIAN_GERMANY 0x01
+# endif
+# ifndef SUBLANG_URDU_PAKISTAN
+# define SUBLANG_URDU_PAKISTAN 0x01
+# endif
+# ifndef SUBLANG_URDU_INDIA
+# define SUBLANG_URDU_INDIA 0x02
+# endif
+# ifndef SUBLANG_UZBEK_LATIN
+# define SUBLANG_UZBEK_LATIN 0x01
+# endif
+# ifndef SUBLANG_UZBEK_CYRILLIC
+# define SUBLANG_UZBEK_CYRILLIC 0x02
+# endif
+# ifndef SUBLANG_VIETNAMESE_VIETNAM
+# define SUBLANG_VIETNAMESE_VIETNAM 0x01
+# endif
+# ifndef SUBLANG_WELSH_UNITED_KINGDOM
+# define SUBLANG_WELSH_UNITED_KINGDOM 0x01
+# endif
+# ifndef SUBLANG_WOLOF_SENEGAL
+# define SUBLANG_WOLOF_SENEGAL 0x01
+# endif
+# ifndef SUBLANG_XHOSA_SOUTH_AFRICA
+# define SUBLANG_XHOSA_SOUTH_AFRICA 0x01
+# endif
+# ifndef SUBLANG_YAKUT_RUSSIA
+# define SUBLANG_YAKUT_RUSSIA 0x01
+# endif
+# ifndef SUBLANG_YI_PRC
+# define SUBLANG_YI_PRC 0x01
+# endif
+# ifndef SUBLANG_YORUBA_NIGERIA
+# define SUBLANG_YORUBA_NIGERIA 0x01
+# endif
+# ifndef SUBLANG_ZULU_SOUTH_AFRICA
+# define SUBLANG_ZULU_SOUTH_AFRICA 0x01
+# endif
+/* GetLocaleInfoA operations.  */
+# ifndef LOCALE_SNAME
+# define LOCALE_SNAME 0x5c
+# endif
+# ifndef LOCALE_NAME_MAX_LENGTH
+# define LOCALE_NAME_MAX_LENGTH 85
+# endif
+/* Don't assume that UNICODE is not defined.  */
+# undef GetLocaleInfo
+# define GetLocaleInfo GetLocaleInfoA
+# undef EnumSystemLocales
+# define EnumSystemLocales EnumSystemLocalesA
+#endif
+
+/* We want to use the system's setlocale() function here, not the gnulib
+   override.  */
+#undef setlocale
+
+
+#if HAVE_CFPREFERENCESCOPYAPPVALUE
+/* Mac OS X 10.4 or newer */
+
+/* Canonicalize a Mac OS X locale name to a Unix locale name.
+   NAME is a sufficiently large buffer.
+   On input, it contains the Mac OS X locale name.
+   On output, it contains the Unix locale name.  */
+# if !defined IN_LIBINTL
+static
+# endif
+void
+gl_locale_name_canonicalize (char *name)
+{
+  /* This conversion is based on a posting by
+     Deborah GoldSmith <goldsmit@apple.com> on 2005-03-08,
+     https://lists.apple.com/archives/carbon-dev/2005/Mar/msg00293.html */
+
+  /* Convert legacy (NeXTstep inherited) English names to Unix (ISO 639 and
+     ISO 3166) names.  Prior to Mac OS X 10.3, there is no API for doing this.
+     Therefore we do it ourselves, using a table based on the results of the
+     Mac OS X 10.3.8 function
+     CFLocaleCreateCanonicalLocaleIdentifierFromString().  */
+  typedef struct { const char legacy[21+1]; const char unixy[5+1]; }
+          legacy_entry;
+  static const legacy_entry legacy_table[] = {
+    { "Afrikaans",             "af" },
+    { "Albanian",              "sq" },
+    { "Amharic",               "am" },
+    { "Arabic",                "ar" },
+    { "Armenian",              "hy" },
+    { "Assamese",              "as" },
+    { "Aymara",                "ay" },
+    { "Azerbaijani",           "az" },
+    { "Basque",                "eu" },
+    { "Belarusian",            "be" },
+    { "Belorussian",           "be" },
+    { "Bengali",               "bn" },
+    { "Brazilian Portugese",   "pt_BR" },
+    { "Brazilian Portuguese",  "pt_BR" },
+    { "Breton",                "br" },
+    { "Bulgarian",             "bg" },
+    { "Burmese",               "my" },
+    { "Byelorussian",          "be" },
+    { "Catalan",               "ca" },
+    { "Chewa",                 "ny" },
+    { "Chichewa",              "ny" },
+    { "Chinese",               "zh" },
+    { "Chinese, Simplified",   "zh_CN" },
+    { "Chinese, Traditional",  "zh_TW" },
+    { "Chinese, Tradtional",   "zh_TW" },
+    { "Croatian",              "hr" },
+    { "Czech",                 "cs" },
+    { "Danish",                "da" },
+    { "Dutch",                 "nl" },
+    { "Dzongkha",              "dz" },
+    { "English",               "en" },
+    { "Esperanto",             "eo" },
+    { "Estonian",              "et" },
+    { "Faroese",               "fo" },
+    { "Farsi",                 "fa" },
+    { "Finnish",               "fi" },
+    { "Flemish",               "nl_BE" },
+    { "French",                "fr" },
+    { "Galician",              "gl" },
+    { "Gallegan",              "gl" },
+    { "Georgian",              "ka" },
+    { "German",                "de" },
+    { "Greek",                 "el" },
+    { "Greenlandic",           "kl" },
+    { "Guarani",               "gn" },
+    { "Gujarati",              "gu" },
+    { "Hawaiian",              "haw" }, /* Yes, "haw", not "cpe".  */
+    { "Hebrew",                "he" },
+    { "Hindi",                 "hi" },
+    { "Hungarian",             "hu" },
+    { "Icelandic",             "is" },
+    { "Indonesian",            "id" },
+    { "Inuktitut",             "iu" },
+    { "Irish",                 "ga" },
+    { "Italian",               "it" },
+    { "Japanese",              "ja" },
+    { "Javanese",              "jv" },
+    { "Kalaallisut",           "kl" },
+    { "Kannada",               "kn" },
+    { "Kashmiri",              "ks" },
+    { "Kazakh",                "kk" },
+    { "Khmer",                 "km" },
+    { "Kinyarwanda",           "rw" },
+    { "Kirghiz",               "ky" },
+    { "Korean",                "ko" },
+    { "Kurdish",               "ku" },
+    { "Latin",                 "la" },
+    { "Latvian",               "lv" },
+    { "Lithuanian",            "lt" },
+    { "Macedonian",            "mk" },
+    { "Malagasy",              "mg" },
+    { "Malay",                 "ms" },
+    { "Malayalam",             "ml" },
+    { "Maltese",               "mt" },
+    { "Manx",                  "gv" },
+    { "Marathi",               "mr" },
+    { "Moldavian",             "mo" },
+    { "Mongolian",             "mn" },
+    { "Nepali",                "ne" },
+    { "Norwegian",             "nb" }, /* Yes, "nb", not the obsolete "no".  */
+    { "Nyanja",                "ny" },
+    { "Nynorsk",               "nn" },
+    { "Oriya",                 "or" },
+    { "Oromo",                 "om" },
+    { "Panjabi",               "pa" },
+    { "Pashto",                "ps" },
+    { "Persian",               "fa" },
+    { "Polish",                "pl" },
+    { "Portuguese",            "pt" },
+    { "Portuguese, Brazilian", "pt_BR" },
+    { "Punjabi",               "pa" },
+    { "Pushto",                "ps" },
+    { "Quechua",               "qu" },
+    { "Romanian",              "ro" },
+    { "Ruanda",                "rw" },
+    { "Rundi",                 "rn" },
+    { "Russian",               "ru" },
+    { "Sami",                  "se_NO" }, /* Not just "se".  */
+    { "Sanskrit",              "sa" },
+    { "Scottish",              "gd" },
+    { "Serbian",               "sr" },
+    { "Simplified Chinese",    "zh_CN" },
+    { "Sindhi",                "sd" },
+    { "Sinhalese",             "si" },
+    { "Slovak",                "sk" },
+    { "Slovenian",             "sl" },
+    { "Somali",                "so" },
+    { "Spanish",               "es" },
+    { "Sundanese",             "su" },
+    { "Swahili",               "sw" },
+    { "Swedish",               "sv" },
+    { "Tagalog",               "tl" },
+    { "Tajik",                 "tg" },
+    { "Tajiki",                "tg" },
+    { "Tamil",                 "ta" },
+    { "Tatar",                 "tt" },
+    { "Telugu",                "te" },
+    { "Thai",                  "th" },
+    { "Tibetan",               "bo" },
+    { "Tigrinya",              "ti" },
+    { "Tongan",                "to" },
+    { "Traditional Chinese",   "zh_TW" },
+    { "Turkish",               "tr" },
+    { "Turkmen",               "tk" },
+    { "Uighur",                "ug" },
+    { "Ukrainian",             "uk" },
+    { "Urdu",                  "ur" },
+    { "Uzbek",                 "uz" },
+    { "Vietnamese",            "vi" },
+    { "Welsh",                 "cy" },
+    { "Yiddish",               "yi" }
+  };
+
+  /* Convert new-style locale names with language tags (ISO 639 and ISO 15924)
+     to Unix (ISO 639 and ISO 3166) names.  */
+  typedef struct { const char langtag[7+1]; const char unixy[12+1]; }
+          langtag_entry;
+  static const langtag_entry langtag_table[] = {
+    /* Mac OS X has "az-Arab", "az-Cyrl", "az-Latn".
+       The default script for az on Unix is Latin.  */
+    { "az-Latn", "az" },
+    /* Mac OS X has "bs-Cyrl", "bs-Latn".
+       The default script for bs on Unix is Latin.  */
+    { "bs-Latn", "bs" },
+    /* Mac OS X has "ga-dots".  Does not yet exist on Unix.  */
+    { "ga-dots", "ga" },
+    /* Mac OS X has "kk-Cyrl".
+       The default script for kk on Unix is Cyrillic.  */
+    { "kk-Cyrl", "kk" },
+    /* Mac OS X has "mn-Cyrl", "mn-Mong".
+       The default script for mn on Unix is Cyrillic.  */
+    { "mn-Cyrl", "mn" },
+    /* Mac OS X has "ms-Arab", "ms-Latn".
+       The default script for ms on Unix is Latin.  */
+    { "ms-Latn", "ms" },
+    /* Mac OS X has "pa-Arab", "pa-Guru".
+       Country codes are used to distinguish these on Unix.  */
+    { "pa-Arab", "pa_PK" },
+    { "pa-Guru", "pa_IN" },
+    /* Mac OS X has "shi-Latn", "shi-Tfng".  Does not yet exist on Unix.  */
+    /* Mac OS X has "sr-Cyrl", "sr-Latn".
+       The default script for sr on Unix is Cyrillic.  */
+    { "sr-Cyrl", "sr" },
+    /* Mac OS X has "tg-Cyrl".
+       The default script for tg on Unix is Cyrillic.  */
+    { "tg-Cyrl", "tg" },
+    /* Mac OS X has "tk-Cyrl".
+       The default script for tk on Unix is Cyrillic.  */
+    { "tk-Cyrl", "tk" },
+    /* Mac OS X has "tt-Cyrl".
+       The default script for tt on Unix is Cyrillic.  */
+    { "tt-Cyrl", "tt" },
+    /* Mac OS X has "uz-Arab", "uz-Cyrl", "uz-Latn".
+       The default script for uz on Unix is Latin.  */
+    { "uz-Latn", "uz" },
+    /* Mac OS X has "vai-Latn", "vai-Vaii".  Does not yet exist on Unix.  */
+    /* Mac OS X has "yue-Hans", "yue-Hant".
+       The default script for yue on Unix is Simplified Han.  */
+    { "yue-Hans", "yue" },
+    /* Mac OS X has "zh-Hans", "zh-Hant".
+       Country codes are used to distinguish these on Unix.  */
+    { "zh-Hans", "zh_CN" },
+    { "zh-Hant", "zh_TW" }
+  };
+
+  /* Convert script names (ISO 15924) to Unix conventions.
+     See https://www.unicode.org/iso15924/iso15924-codes.html  */
+  typedef struct { const char script[4+1]; const char unixy[9+1]; }
+          script_entry;
+  static const script_entry script_table[] = {
+    { "Arab", "arabic" },
+    { "Cyrl", "cyrillic" },
+    { "Latn", "latin" },
+    { "Mong", "mongolian" }
+  };
+
+  /* Step 1: Convert using legacy_table.  */
+  if (name[0] >= 'A' && name[0] <= 'Z')
+    {
+      unsigned int i1, i2;
+      i1 = 0;
+      i2 = sizeof (legacy_table) / sizeof (legacy_entry);
+      while (i2 - i1 > 1)
+        {
+          /* At this point we know that if name occurs in legacy_table,
+             its index must be >= i1 and < i2.  */
+          unsigned int i = (i1 + i2) >> 1;
+          const legacy_entry *p = &legacy_table[i];
+          if (strcmp (name, p->legacy) < 0)
+            i2 = i;
+          else
+            i1 = i;
+        }
+      if (strcmp (name, legacy_table[i1].legacy) == 0)
+        {
+          strcpy (name, legacy_table[i1].unixy);
+          return;
+        }
+    }
+
+  /* Step 2: Convert using langtag_table and script_table.  */
+  if (strlen (name) == 7 && name[2] == '-')
+    {
+      unsigned int i1, i2;
+      i1 = 0;
+      i2 = sizeof (langtag_table) / sizeof (langtag_entry);
+      while (i2 - i1 > 1)
+        {
+          /* At this point we know that if name occurs in langtag_table,
+             its index must be >= i1 and < i2.  */
+          unsigned int i = (i1 + i2) >> 1;
+          const langtag_entry *p = &langtag_table[i];
+          if (strcmp (name, p->langtag) < 0)
+            i2 = i;
+          else
+            i1 = i;
+        }
+      if (strcmp (name, langtag_table[i1].langtag) == 0)
+        {
+          strcpy (name, langtag_table[i1].unixy);
+          return;
+        }
+
+      i1 = 0;
+      i2 = sizeof (script_table) / sizeof (script_entry);
+      while (i2 - i1 > 1)
+        {
+          /* At this point we know that if (name + 3) occurs in script_table,
+             its index must be >= i1 and < i2.  */
+          unsigned int i = (i1 + i2) >> 1;
+          const script_entry *p = &script_table[i];
+          if (strcmp (name + 3, p->script) < 0)
+            i2 = i;
+          else
+            i1 = i;
+        }
+      if (strcmp (name + 3, script_table[i1].script) == 0)
+        {
+          name[2] = '@';
+          strcpy (name + 3, script_table[i1].unixy);
+          return;
+        }
+    }
+
+  /* Step 3: Convert new-style dash to Unix underscore. */
+  {
+    char *p;
+    for (p = name; *p != '\0'; p++)
+      if (*p == '-')
+        *p = '_';
+  }
+}
+
+#endif
+
+
+#if defined WINDOWS_NATIVE || defined __CYGWIN__ /* Native Windows or Cygwin */
+
+/* Canonicalize a Windows native locale name to a Unix locale name.
+   NAME is a sufficiently large buffer.
+   On input, it contains the Windows locale name.
+   On output, it contains the Unix locale name.  */
+# if !defined IN_LIBINTL
+static
+# endif
+void
+gl_locale_name_canonicalize (char *name)
+{
+  /* FIXME: This is probably incomplete: it does not handle "zh-Hans" and
+     "zh-Hant".  */
+  char *p;
+
+  for (p = name; *p != '\0'; p++)
+    if (*p == '-')
+      {
+        *p = '_';
+        p++;
+        for (; *p != '\0'; p++)
+          {
+            if (*p >= 'a' && *p <= 'z')
+              *p += 'A' - 'a';
+            if (*p == '-')
+              {
+                *p = '\0';
+                return;
+              }
+          }
+        return;
+      }
+}
+
+# if !defined IN_LIBINTL
+static
+# endif
+const char *
+gl_locale_name_from_win32_LANGID (LANGID langid)
+{
+  /* Activate the new code only when the GETTEXT_MUI environment variable is
+     set, for the time being, since the new code is not well tested.  */
+  if (getenv ("GETTEXT_MUI") != NULL)
+    {
+      static char namebuf[256];
+
+      /* Query the system's notion of locale name.
+         On Windows95/98/ME, GetLocaleInfoA returns some incorrect results.
+         But we don't need to support systems that are so old.  */
+      if (GetLocaleInfoA (MAKELCID (langid, SORT_DEFAULT), LOCALE_SNAME,
+                          namebuf, sizeof (namebuf) - 1))
+        {
+          /* Convert it to a Unix locale name.  */
+          gl_locale_name_canonicalize (namebuf);
+          return namebuf;
+        }
+    }
+  /* Internet Explorer has an LCID to RFC3066 name mapping stored in
+     HKEY_CLASSES_ROOT\Mime\Database\Rfc1766.  But we better don't use that
+     since IE's i18n subsystem is known to be inconsistent with the native
+     Windows base (e.g. they have different character conversion facilities
+     that produce different results).  */
+  /* Use our own table.  */
+  {
+    int primary, sub;
+
+    /* Split into language and territory part.  */
+    primary = PRIMARYLANGID (langid);
+    sub = SUBLANGID (langid);
+
+    /* Dispatch on language.
+       See also https://www.unicode.org/unicode/onlinedat/languages.html .
+       For details about languages, see https://www.ethnologue.com/ .  */
+    switch (primary)
+      {
+      case LANG_AFRIKAANS:
+        switch (sub)
+          {
+          case SUBLANG_AFRIKAANS_SOUTH_AFRICA: return "af_ZA";
+          }
+        return "af";
+      case LANG_ALBANIAN:
+        switch (sub)
+          {
+          case SUBLANG_ALBANIAN_ALBANIA: return "sq_AL";
+          }
+        return "sq";
+      case LANG_ALSATIAN:
+        switch (sub)
+          {
+          case SUBLANG_ALSATIAN_FRANCE: return "gsw_FR";
+          }
+        return "gsw";
+      case LANG_AMHARIC:
+        switch (sub)
+          {
+          case SUBLANG_AMHARIC_ETHIOPIA: return "am_ET";
+          }
+        return "am";
+      case LANG_ARABIC:
+        switch (sub)
+          {
+          case SUBLANG_ARABIC_SAUDI_ARABIA: return "ar_SA";
+          case SUBLANG_ARABIC_IRAQ: return "ar_IQ";
+          case SUBLANG_ARABIC_EGYPT: return "ar_EG";
+          case SUBLANG_ARABIC_LIBYA: return "ar_LY";
+          case SUBLANG_ARABIC_ALGERIA: return "ar_DZ";
+          case SUBLANG_ARABIC_MOROCCO: return "ar_MA";
+          case SUBLANG_ARABIC_TUNISIA: return "ar_TN";
+          case SUBLANG_ARABIC_OMAN: return "ar_OM";
+          case SUBLANG_ARABIC_YEMEN: return "ar_YE";
+          case SUBLANG_ARABIC_SYRIA: return "ar_SY";
+          case SUBLANG_ARABIC_JORDAN: return "ar_JO";
+          case SUBLANG_ARABIC_LEBANON: return "ar_LB";
+          case SUBLANG_ARABIC_KUWAIT: return "ar_KW";
+          case SUBLANG_ARABIC_UAE: return "ar_AE";
+          case SUBLANG_ARABIC_BAHRAIN: return "ar_BH";
+          case SUBLANG_ARABIC_QATAR: return "ar_QA";
+          }
+        return "ar";
+      case LANG_ARMENIAN:
+        switch (sub)
+          {
+          case SUBLANG_ARMENIAN_ARMENIA: return "hy_AM";
+          }
+        return "hy";
+      case LANG_ASSAMESE:
+        switch (sub)
+          {
+          case SUBLANG_ASSAMESE_INDIA: return "as_IN";
+          }
+        return "as";
+      case LANG_AZERI:
+        switch (sub)
+          {
+          /* FIXME: Adjust this when Azerbaijani locales appear on Unix.  */
+          case 0x1e: return "az@latin";
+          case SUBLANG_AZERI_LATIN: return "az_AZ@latin";
+          case 0x1d: return "az@cyrillic";
+          case SUBLANG_AZERI_CYRILLIC: return "az_AZ@cyrillic";
+          }
+        return "az";
+      case LANG_BASHKIR:
+        switch (sub)
+          {
+          case SUBLANG_BASHKIR_RUSSIA: return "ba_RU";
+          }
+        return "ba";
+      case LANG_BASQUE:
+        switch (sub)
+          {
+          case SUBLANG_BASQUE_BASQUE: return "eu_ES";
+          }
+        return "eu"; /* Ambiguous: could be "eu_ES" or "eu_FR".  */
+      case LANG_BELARUSIAN:
+        switch (sub)
+          {
+          case SUBLANG_BELARUSIAN_BELARUS: return "be_BY";
+          }
+        return "be";
+      case LANG_BENGALI:
+        switch (sub)
+          {
+          case SUBLANG_BENGALI_INDIA: return "bn_IN";
+          case SUBLANG_BENGALI_BANGLADESH: return "bn_BD";
+          }
+        return "bn";
+      case LANG_BRETON:
+        switch (sub)
+          {
+          case SUBLANG_BRETON_FRANCE: return "br_FR";
+          }
+        return "br";
+      case LANG_BULGARIAN:
+        switch (sub)
+          {
+          case SUBLANG_BULGARIAN_BULGARIA: return "bg_BG";
+          }
+        return "bg";
+      case LANG_BURMESE:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "my_MM";
+          }
+        return "my";
+      case LANG_CAMBODIAN:
+        switch (sub)
+          {
+          case SUBLANG_CAMBODIAN_CAMBODIA: return "km_KH";
+          }
+        return "km";
+      case LANG_CATALAN:
+        switch (sub)
+          {
+          case SUBLANG_CATALAN_SPAIN: return "ca_ES";
+          }
+        return "ca";
+      case LANG_CHEROKEE:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "chr_US";
+          }
+        return "chr";
+      case LANG_CHINESE:
+        switch (sub)
+          {
+          case SUBLANG_CHINESE_TRADITIONAL: case 0x1f: return "zh_TW";
+          case SUBLANG_CHINESE_SIMPLIFIED: case 0x00: return "zh_CN";
+          case SUBLANG_CHINESE_HONGKONG: return "zh_HK"; /* traditional */
+          case SUBLANG_CHINESE_SINGAPORE: return "zh_SG"; /* simplified */
+          case SUBLANG_CHINESE_MACAU: return "zh_MO"; /* traditional */
+          }
+        return "zh";
+      case LANG_CORSICAN:
+        switch (sub)
+          {
+          case SUBLANG_CORSICAN_FRANCE: return "co_FR";
+          }
+        return "co";
+      case LANG_CROATIAN:      /* LANG_CROATIAN == LANG_SERBIAN == LANG_BOSNIAN
+                                * What used to be called Serbo-Croatian
+                                * should really now be two separate
+                                * languages because of political reasons.
+                                * (Says tml, who knows nothing about Serbian
+                                * or Croatian.)
+                                * (I can feel those flames coming already.)
+                                */
+        switch (sub)
+          {
+          /* Croatian */
+          case 0x00: return "hr";
+          case SUBLANG_CROATIAN_CROATIA: return "hr_HR";
+          case SUBLANG_CROATIAN_BOSNIA_HERZEGOVINA_LATIN: return "hr_BA";
+          /* Serbian */
+          case 0x1f: return "sr";
+          case 0x1c: return "sr"; /* latin */
+          case SUBLANG_SERBIAN_LATIN: return "sr_CS"; /* latin */
+          case 0x09: return "sr_RS"; /* latin */
+          case 0x0b: return "sr_ME"; /* latin */
+          case 0x06: return "sr_BA"; /* latin */
+          case 0x1b: return "sr@cyrillic";
+          case SUBLANG_SERBIAN_CYRILLIC: return "sr_CS@cyrillic";
+          case 0x0a: return "sr_RS@cyrillic";
+          case 0x0c: return "sr_ME@cyrillic";
+          case 0x07: return "sr_BA@cyrillic";
+          /* Bosnian */
+          case 0x1e: return "bs";
+          case 0x1a: return "bs"; /* latin */
+          case SUBLANG_BOSNIAN_BOSNIA_HERZEGOVINA_LATIN: return "bs_BA"; /* latin */
+          case 0x19: return "bs@cyrillic";
+          case SUBLANG_BOSNIAN_BOSNIA_HERZEGOVINA_CYRILLIC: return "bs_BA@cyrillic";
+          }
+        return "hr";
+      case LANG_CZECH:
+        switch (sub)
+          {
+          case SUBLANG_CZECH_CZECH_REPUBLIC: return "cs_CZ";
+          }
+        return "cs";
+      case LANG_DANISH:
+        switch (sub)
+          {
+          case SUBLANG_DANISH_DENMARK: return "da_DK";
+          }
+        return "da";
+      case LANG_DARI:
+        /* FIXME: Adjust this when such locales appear on Unix.  */
+        switch (sub)
+          {
+          case SUBLANG_DARI_AFGHANISTAN: return "prs_AF";
+          }
+        return "prs";
+      case LANG_DIVEHI:
+        switch (sub)
+          {
+          case SUBLANG_DIVEHI_MALDIVES: return "dv_MV";
+          }
+        return "dv";
+      case LANG_DUTCH:
+        switch (sub)
+          {
+          case SUBLANG_DUTCH: return "nl_NL";
+          case SUBLANG_DUTCH_BELGIAN: /* FLEMISH, VLAAMS */ return "nl_BE";
+          case SUBLANG_DUTCH_SURINAM: return "nl_SR";
+          }
+        return "nl";
+      case LANG_EDO:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "bin_NG";
+          }
+        return "bin";
+      case LANG_ENGLISH:
+        switch (sub)
+          {
+          /* SUBLANG_ENGLISH_US == SUBLANG_DEFAULT. Heh. I thought
+           * English was the language spoken in England.
+           * Oh well.
+           */
+          case SUBLANG_ENGLISH_US: return "en_US";
+          case SUBLANG_ENGLISH_UK: return "en_GB";
+          case SUBLANG_ENGLISH_AUS: return "en_AU";
+          case SUBLANG_ENGLISH_CAN: return "en_CA";
+          case SUBLANG_ENGLISH_NZ: return "en_NZ";
+          case SUBLANG_ENGLISH_EIRE: return "en_IE";
+          case SUBLANG_ENGLISH_SOUTH_AFRICA: return "en_ZA";
+          case SUBLANG_ENGLISH_JAMAICA: return "en_JM";
+          case SUBLANG_ENGLISH_CARIBBEAN: return "en_GD"; /* Grenada? */
+          case SUBLANG_ENGLISH_BELIZE: return "en_BZ";
+          case SUBLANG_ENGLISH_TRINIDAD: return "en_TT";
+          case SUBLANG_ENGLISH_ZIMBABWE: return "en_ZW";
+          case SUBLANG_ENGLISH_PHILIPPINES: return "en_PH";
+          case SUBLANG_ENGLISH_INDONESIA: return "en_ID";
+          case SUBLANG_ENGLISH_HONGKONG: return "en_HK";
+          case SUBLANG_ENGLISH_INDIA: return "en_IN";
+          case SUBLANG_ENGLISH_MALAYSIA: return "en_MY";
+          case SUBLANG_ENGLISH_SINGAPORE: return "en_SG";
+          }
+        return "en";
+      case LANG_ESTONIAN:
+        switch (sub)
+          {
+          case SUBLANG_ESTONIAN_ESTONIA: return "et_EE";
+          }
+        return "et";
+      case LANG_FAEROESE:
+        switch (sub)
+          {
+          case SUBLANG_FAEROESE_FAROE_ISLANDS: return "fo_FO";
+          }
+        return "fo";
+      case LANG_FARSI:
+        switch (sub)
+          {
+          case SUBLANG_FARSI_IRAN: return "fa_IR";
+          }
+        return "fa";
+      case LANG_FINNISH:
+        switch (sub)
+          {
+          case SUBLANG_FINNISH_FINLAND: return "fi_FI";
+          }
+        return "fi";
+      case LANG_FRENCH:
+        switch (sub)
+          {
+          case SUBLANG_FRENCH: return "fr_FR";
+          case SUBLANG_FRENCH_BELGIAN: /* WALLOON */ return "fr_BE";
+          case SUBLANG_FRENCH_CANADIAN: return "fr_CA";
+          case SUBLANG_FRENCH_SWISS: return "fr_CH";
+          case SUBLANG_FRENCH_LUXEMBOURG: return "fr_LU";
+          case SUBLANG_FRENCH_MONACO: return "fr_MC";
+          case SUBLANG_FRENCH_WESTINDIES: return "fr"; /* Caribbean? */
+          case SUBLANG_FRENCH_REUNION: return "fr_RE";
+          case SUBLANG_FRENCH_CONGO: return "fr_CG";
+          case SUBLANG_FRENCH_SENEGAL: return "fr_SN";
+          case SUBLANG_FRENCH_CAMEROON: return "fr_CM";
+          case SUBLANG_FRENCH_COTEDIVOIRE: return "fr_CI";
+          case SUBLANG_FRENCH_MALI: return "fr_ML";
+          case SUBLANG_FRENCH_MOROCCO: return "fr_MA";
+          case SUBLANG_FRENCH_HAITI: return "fr_HT";
+          }
+        return "fr";
+      case LANG_FRISIAN:
+        switch (sub)
+          {
+          case SUBLANG_FRISIAN_NETHERLANDS: return "fy_NL";
+          }
+        return "fy";
+      case LANG_FULFULDE:
+        /* Spoken in Nigeria, Guinea, Senegal, Mali, Niger, Cameroon, Benin.  */
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "ff_NG";
+          }
+        return "ff";
+      case LANG_GAELIC:
+        switch (sub)
+          {
+          case 0x01: /* SCOTTISH */
+            /* old, superseded by LANG_SCOTTISH_GAELIC */
+            return "gd_GB";
+          case SUBLANG_IRISH_IRELAND: return "ga_IE";
+          }
+        return "ga";
+      case LANG_GALICIAN:
+        switch (sub)
+          {
+          case SUBLANG_GALICIAN_SPAIN: return "gl_ES";
+          }
+        return "gl";
+      case LANG_GEORGIAN:
+        switch (sub)
+          {
+          case SUBLANG_GEORGIAN_GEORGIA: return "ka_GE";
+          }
+        return "ka";
+      case LANG_GERMAN:
+        switch (sub)
+          {
+          case SUBLANG_GERMAN: return "de_DE";
+          case SUBLANG_GERMAN_SWISS: return "de_CH";
+          case SUBLANG_GERMAN_AUSTRIAN: return "de_AT";
+          case SUBLANG_GERMAN_LUXEMBOURG: return "de_LU";
+          case SUBLANG_GERMAN_LIECHTENSTEIN: return "de_LI";
+          }
+        return "de";
+      case LANG_GREEK:
+        switch (sub)
+          {
+          case SUBLANG_GREEK_GREECE: return "el_GR";
+          }
+        return "el";
+      case LANG_GREENLANDIC:
+        switch (sub)
+          {
+          case SUBLANG_GREENLANDIC_GREENLAND: return "kl_GL";
+          }
+        return "kl";
+      case LANG_GUARANI:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "gn_PY";
+          }
+        return "gn";
+      case LANG_GUJARATI:
+        switch (sub)
+          {
+          case SUBLANG_GUJARATI_INDIA: return "gu_IN";
+          }
+        return "gu";
+      case LANG_HAUSA:
+        switch (sub)
+          {
+          case 0x1f: return "ha";
+          case SUBLANG_HAUSA_NIGERIA_LATIN: return "ha_NG";
+          }
+        return "ha";
+      case LANG_HAWAIIAN:
+        /* FIXME: Do they mean Hawaiian ("haw_US", 1000 speakers)
+           or Hawaii Creole English ("cpe_US", 600000 speakers)?  */
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "cpe_US";
+          }
+        return "cpe";
+      case LANG_HEBREW:
+        switch (sub)
+          {
+          case SUBLANG_HEBREW_ISRAEL: return "he_IL";
+          }
+        return "he";
+      case LANG_HINDI:
+        switch (sub)
+          {
+          case SUBLANG_HINDI_INDIA: return "hi_IN";
+          }
+        return "hi";
+      case LANG_HUNGARIAN:
+        switch (sub)
+          {
+          case SUBLANG_HUNGARIAN_HUNGARY: return "hu_HU";
+          }
+        return "hu";
+      case LANG_IBIBIO:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "nic_NG";
+          }
+        return "nic";
+      case LANG_ICELANDIC:
+        switch (sub)
+          {
+          case SUBLANG_ICELANDIC_ICELAND: return "is_IS";
+          }
+        return "is";
+      case LANG_IGBO:
+        switch (sub)
+          {
+          case SUBLANG_IGBO_NIGERIA: return "ig_NG";
+          }
+        return "ig";
+      case LANG_INDONESIAN:
+        switch (sub)
+          {
+          case SUBLANG_INDONESIAN_INDONESIA: return "id_ID";
+          }
+        return "id";
+      case LANG_INUKTITUT:
+        switch (sub)
+          {
+          case 0x1e: return "iu"; /* syllabic */
+          case SUBLANG_INUKTITUT_CANADA: return "iu_CA"; /* syllabic */
+          case 0x1f: return "iu@latin";
+          case SUBLANG_INUKTITUT_CANADA_LATIN: return "iu_CA@latin";
+          }
+        return "iu";
+      case LANG_ITALIAN:
+        switch (sub)
+          {
+          case SUBLANG_ITALIAN: return "it_IT";
+          case SUBLANG_ITALIAN_SWISS: return "it_CH";
+          }
+        return "it";
+      case LANG_JAPANESE:
+        switch (sub)
+          {
+          case SUBLANG_JAPANESE_JAPAN: return "ja_JP";
+          }
+        return "ja";
+      case LANG_KANNADA:
+        switch (sub)
+          {
+          case SUBLANG_KANNADA_INDIA: return "kn_IN";
+          }
+        return "kn";
+      case LANG_KANURI:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "kr_NG";
+          }
+        return "kr";
+      case LANG_KASHMIRI:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "ks_PK";
+          case SUBLANG_KASHMIRI_INDIA: return "ks_IN";
+          }
+        return "ks";
+      case LANG_KAZAK:
+        switch (sub)
+          {
+          case SUBLANG_KAZAK_KAZAKHSTAN: return "kk_KZ";
+          }
+        return "kk";
+      case LANG_KICHE:
+        /* FIXME: Adjust this when such locales appear on Unix.  */
+        switch (sub)
+          {
+          case SUBLANG_KICHE_GUATEMALA: return "qut_GT";
+          }
+        return "qut";
+      case LANG_KINYARWANDA:
+        switch (sub)
+          {
+          case SUBLANG_KINYARWANDA_RWANDA: return "rw_RW";
+          }
+        return "rw";
+      case LANG_KONKANI:
+        /* FIXME: Adjust this when such locales appear on Unix.  */
+        switch (sub)
+          {
+          case SUBLANG_KONKANI_INDIA: return "kok_IN";
+          }
+        return "kok";
+      case LANG_KOREAN:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "ko_KR";
+          }
+        return "ko";
+      case LANG_KYRGYZ:
+        switch (sub)
+          {
+          case SUBLANG_KYRGYZ_KYRGYZSTAN: return "ky_KG";
+          }
+        return "ky";
+      case LANG_LAO:
+        switch (sub)
+          {
+          case SUBLANG_LAO_LAOS: return "lo_LA";
+          }
+        return "lo";
+      case LANG_LATIN:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "la_VA";
+          }
+        return "la";
+      case LANG_LATVIAN:
+        switch (sub)
+          {
+          case SUBLANG_LATVIAN_LATVIA: return "lv_LV";
+          }
+        return "lv";
+      case LANG_LITHUANIAN:
+        switch (sub)
+          {
+          case SUBLANG_LITHUANIAN_LITHUANIA: return "lt_LT";
+          }
+        return "lt";
+      case LANG_LUXEMBOURGISH:
+        switch (sub)
+          {
+          case SUBLANG_LUXEMBOURGISH_LUXEMBOURG: return "lb_LU";
+          }
+        return "lb";
+      case LANG_MACEDONIAN:
+        switch (sub)
+          {
+          case SUBLANG_MACEDONIAN_MACEDONIA: return "mk_MK";
+          }
+        return "mk";
+      case LANG_MALAY:
+        switch (sub)
+          {
+          case SUBLANG_MALAY_MALAYSIA: return "ms_MY";
+          case SUBLANG_MALAY_BRUNEI_DARUSSALAM: return "ms_BN";
+          }
+        return "ms";
+      case LANG_MALAYALAM:
+        switch (sub)
+          {
+          case SUBLANG_MALAYALAM_INDIA: return "ml_IN";
+          }
+        return "ml";
+      case LANG_MALTESE:
+        switch (sub)
+          {
+          case SUBLANG_MALTESE_MALTA: return "mt_MT";
+          }
+        return "mt";
+      case LANG_MANIPURI:
+        /* FIXME: Adjust this when such locales appear on Unix.  */
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "mni_IN";
+          }
+        return "mni";
+      case LANG_MAORI:
+        switch (sub)
+          {
+          case SUBLANG_MAORI_NEW_ZEALAND: return "mi_NZ";
+          }
+        return "mi";
+      case LANG_MAPUDUNGUN:
+        switch (sub)
+          {
+          case SUBLANG_MAPUDUNGUN_CHILE: return "arn_CL";
+          }
+        return "arn";
+      case LANG_MARATHI:
+        switch (sub)
+          {
+          case SUBLANG_MARATHI_INDIA: return "mr_IN";
+          }
+        return "mr";
+      case LANG_MOHAWK:
+        switch (sub)
+          {
+          case SUBLANG_MOHAWK_CANADA: return "moh_CA";
+          }
+        return "moh";
+      case LANG_MONGOLIAN:
+        switch (sub)
+          {
+          case SUBLANG_MONGOLIAN_CYRILLIC_MONGOLIA: case 0x1e: return "mn_MN";
+          case SUBLANG_MONGOLIAN_PRC: case 0x1f: return "mn_CN";
+          }
+        return "mn"; /* Ambiguous: could be "mn_CN" or "mn_MN".  */
+      case LANG_NEPALI:
+        switch (sub)
+          {
+          case SUBLANG_NEPALI_NEPAL: return "ne_NP";
+          case SUBLANG_NEPALI_INDIA: return "ne_IN";
+          }
+        return "ne";
+      case LANG_NORWEGIAN:
+        switch (sub)
+          {
+          case 0x1f: return "nb";
+          case SUBLANG_NORWEGIAN_BOKMAL: return "nb_NO";
+          case 0x1e: return "nn";
+          case SUBLANG_NORWEGIAN_NYNORSK: return "nn_NO";
+          }
+        return "no";
+      case LANG_OCCITAN:
+        switch (sub)
+          {
+          case SUBLANG_OCCITAN_FRANCE: return "oc_FR";
+          }
+        return "oc";
+      case LANG_ORIYA:
+        switch (sub)
+          {
+          case SUBLANG_ORIYA_INDIA: return "or_IN";
+          }
+        return "or";
+      case LANG_OROMO:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "om_ET";
+          }
+        return "om";
+      case LANG_PAPIAMENTU:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "pap_AN";
+          }
+        return "pap";
+      case LANG_PASHTO:
+        switch (sub)
+          {
+          case SUBLANG_PASHTO_AFGHANISTAN: return "ps_AF";
+          }
+        return "ps"; /* Ambiguous: could be "ps_PK" or "ps_AF".  */
+      case LANG_POLISH:
+        switch (sub)
+          {
+          case SUBLANG_POLISH_POLAND: return "pl_PL";
+          }
+        return "pl";
+      case LANG_PORTUGUESE:
+        switch (sub)
+          {
+          /* Hmm. SUBLANG_PORTUGUESE_BRAZILIAN == SUBLANG_DEFAULT.
+             Same phenomenon as SUBLANG_ENGLISH_US == SUBLANG_DEFAULT. */
+          case SUBLANG_PORTUGUESE_BRAZILIAN: return "pt_BR";
+          case SUBLANG_PORTUGUESE: return "pt_PT";
+          }
+        return "pt";
+      case LANG_PUNJABI:
+        switch (sub)
+          {
+          case SUBLANG_PUNJABI_INDIA: return "pa_IN"; /* Gurmukhi script */
+          case SUBLANG_PUNJABI_PAKISTAN: return "pa_PK"; /* Arabic script */
+          }
+        return "pa";
+      case LANG_QUECHUA:
+        /* Note: Microsoft uses the non-ISO language code "quz".  */
+        switch (sub)
+          {
+          case SUBLANG_QUECHUA_BOLIVIA: return "qu_BO";
+          case SUBLANG_QUECHUA_ECUADOR: return "qu_EC";
+          case SUBLANG_QUECHUA_PERU: return "qu_PE";
+          }
+        return "qu";
+      case LANG_ROMANIAN:
+        switch (sub)
+          {
+          case SUBLANG_ROMANIAN_ROMANIA: return "ro_RO";
+          case SUBLANG_ROMANIAN_MOLDOVA: return "ro_MD";
+          }
+        return "ro";
+      case LANG_ROMANSH:
+        switch (sub)
+          {
+          case SUBLANG_ROMANSH_SWITZERLAND: return "rm_CH";
+          }
+        return "rm";
+      case LANG_RUSSIAN:
+        switch (sub)
+          {
+          case SUBLANG_RUSSIAN_RUSSIA: return "ru_RU";
+          case SUBLANG_RUSSIAN_MOLDAVIA: return "ru_MD";
+          }
+        return "ru"; /* Ambiguous: could be "ru_RU" or "ru_UA" or "ru_MD".  */
+      case LANG_SAMI:
+        switch (sub)
+          {
+          /* Northern Sami */
+          case 0x00: return "se";
+          case SUBLANG_SAMI_NORTHERN_NORWAY: return "se_NO";
+          case SUBLANG_SAMI_NORTHERN_SWEDEN: return "se_SE";
+          case SUBLANG_SAMI_NORTHERN_FINLAND: return "se_FI";
+          /* Lule Sami */
+          case 0x1f: return "smj";
+          case SUBLANG_SAMI_LULE_NORWAY: return "smj_NO";
+          case SUBLANG_SAMI_LULE_SWEDEN: return "smj_SE";
+          /* Southern Sami */
+          case 0x1e: return "sma";
+          case SUBLANG_SAMI_SOUTHERN_NORWAY: return "sma_NO";
+          case SUBLANG_SAMI_SOUTHERN_SWEDEN: return "sma_SE";
+          /* Skolt Sami */
+          case 0x1d: return "sms";
+          case SUBLANG_SAMI_SKOLT_FINLAND: return "sms_FI";
+          /* Inari Sami */
+          case 0x1c: return "smn";
+          case SUBLANG_SAMI_INARI_FINLAND: return "smn_FI";
+          }
+        return "se"; /* or "smi"? */
+      case LANG_SANSKRIT:
+        switch (sub)
+          {
+          case SUBLANG_SANSKRIT_INDIA: return "sa_IN";
+          }
+        return "sa";
+      case LANG_SCOTTISH_GAELIC:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "gd_GB";
+          }
+        return "gd";
+      case LANG_SINDHI:
+        switch (sub)
+          {
+          case SUBLANG_SINDHI_INDIA: return "sd_IN";
+          case SUBLANG_SINDHI_PAKISTAN: return "sd_PK";
+          /*case SUBLANG_SINDHI_AFGHANISTAN: return "sd_AF";*/
+          }
+        return "sd";
+      case LANG_SINHALESE:
+        switch (sub)
+          {
+          case SUBLANG_SINHALESE_SRI_LANKA: return "si_LK";
+          }
+        return "si";
+      case LANG_SLOVAK:
+        switch (sub)
+          {
+          case SUBLANG_SLOVAK_SLOVAKIA: return "sk_SK";
+          }
+        return "sk";
+      case LANG_SLOVENIAN:
+        switch (sub)
+          {
+          case SUBLANG_SLOVENIAN_SLOVENIA: return "sl_SI";
+          }
+        return "sl";
+      case LANG_SOMALI:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "so_SO";
+          }
+        return "so";
+      case LANG_SORBIAN:
+        /* FIXME: Adjust this when such locales appear on Unix.  */
+        switch (sub)
+          {
+          /* Upper Sorbian */
+          case 0x00: return "hsb";
+          case SUBLANG_UPPER_SORBIAN_GERMANY: return "hsb_DE";
+          /* Lower Sorbian */
+          case 0x1f: return "dsb";
+          case SUBLANG_LOWER_SORBIAN_GERMANY: return "dsb_DE";
+          }
+        return "wen";
+      case LANG_SOTHO:
+        /* <https://docs.microsoft.com/en-us/windows/desktop/Intl/language-identifier-constants-and-strings>
+           calls it "Sesotho sa Leboa"; according to
+           <https://www.ethnologue.com/show_language.asp?code=nso>
+           <https://www.ethnologue.com/show_language.asp?code=sot>
+           it's the same as Northern Sotho.  */
+        switch (sub)
+          {
+          case SUBLANG_SOTHO_SOUTH_AFRICA: return "nso_ZA";
+          }
+        return "nso";
+      case LANG_SPANISH:
+        switch (sub)
+          {
+          case SUBLANG_SPANISH: return "es_ES";
+          case SUBLANG_SPANISH_MEXICAN: return "es_MX";
+          case SUBLANG_SPANISH_MODERN:
+            return "es_ES@modern";      /* not seen on Unix */
+          case SUBLANG_SPANISH_GUATEMALA: return "es_GT";
+          case SUBLANG_SPANISH_COSTA_RICA: return "es_CR";
+          case SUBLANG_SPANISH_PANAMA: return "es_PA";
+          case SUBLANG_SPANISH_DOMINICAN_REPUBLIC: return "es_DO";
+          case SUBLANG_SPANISH_VENEZUELA: return "es_VE";
+          case SUBLANG_SPANISH_COLOMBIA: return "es_CO";
+          case SUBLANG_SPANISH_PERU: return "es_PE";
+          case SUBLANG_SPANISH_ARGENTINA: return "es_AR";
+          case SUBLANG_SPANISH_ECUADOR: return "es_EC";
+          case SUBLANG_SPANISH_CHILE: return "es_CL";
+          case SUBLANG_SPANISH_URUGUAY: return "es_UY";
+          case SUBLANG_SPANISH_PARAGUAY: return "es_PY";
+          case SUBLANG_SPANISH_BOLIVIA: return "es_BO";
+          case SUBLANG_SPANISH_EL_SALVADOR: return "es_SV";
+          case SUBLANG_SPANISH_HONDURAS: return "es_HN";
+          case SUBLANG_SPANISH_NICARAGUA: return "es_NI";
+          case SUBLANG_SPANISH_PUERTO_RICO: return "es_PR";
+          case SUBLANG_SPANISH_US: return "es_US";
+          }
+        return "es";
+      case LANG_SUTU:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "bnt_TZ"; /* or "st_LS" or "nso_ZA"? */
+          }
+        return "bnt";
+      case LANG_SWAHILI:
+        switch (sub)
+          {
+          case SUBLANG_SWAHILI_KENYA: return "sw_KE";
+          }
+        return "sw";
+      case LANG_SWEDISH:
+        switch (sub)
+          {
+          case SUBLANG_SWEDISH_SWEDEN: return "sv_SE";
+          case SUBLANG_SWEDISH_FINLAND: return "sv_FI";
+          }
+        return "sv";
+      case LANG_SYRIAC:
+        switch (sub)
+          {
+          case SUBLANG_SYRIAC_SYRIA: return "syr_SY"; /* An extinct language.  */
+          }
+        return "syr";
+      case LANG_TAGALOG:
+        switch (sub)
+          {
+          case SUBLANG_TAGALOG_PHILIPPINES: return "tl_PH"; /* or "fil_PH"? */
+          }
+        return "tl"; /* or "fil"? */
+      case LANG_TAJIK:
+        switch (sub)
+          {
+          case 0x1f: return "tg";
+          case SUBLANG_TAJIK_TAJIKISTAN: return "tg_TJ";
+          }
+        return "tg";
+      case LANG_TAMAZIGHT:
+        /* Note: Microsoft uses the non-ISO language code "tmz".  */
+        switch (sub)
+          {
+          /* FIXME: Adjust this when Tamazight locales appear on Unix.  */
+          case SUBLANG_TAMAZIGHT_ARABIC: return "ber_MA@arabic";
+          case 0x1f: return "ber@latin";
+          case SUBLANG_TAMAZIGHT_ALGERIA_LATIN: return "ber_DZ@latin";
+          }
+        return "ber";
+      case LANG_TAMIL:
+        switch (sub)
+          {
+          case SUBLANG_TAMIL_INDIA: return "ta_IN";
+          }
+        return "ta"; /* Ambiguous: could be "ta_IN" or "ta_LK" or "ta_SG".  */
+      case LANG_TATAR:
+        switch (sub)
+          {
+          case SUBLANG_TATAR_RUSSIA: return "tt_RU";
+          }
+        return "tt";
+      case LANG_TELUGU:
+        switch (sub)
+          {
+          case SUBLANG_TELUGU_INDIA: return "te_IN";
+          }
+        return "te";
+      case LANG_THAI:
+        switch (sub)
+          {
+          case SUBLANG_THAI_THAILAND: return "th_TH";
+          }
+        return "th";
+      case LANG_TIBETAN:
+        switch (sub)
+          {
+          case SUBLANG_TIBETAN_PRC:
+            /* Most Tibetans would not like "bo_CN".  But Tibet does not yet
+               have a country code of its own.  */
+            return "bo";
+          case SUBLANG_TIBETAN_BHUTAN: return "bo_BT";
+          }
+        return "bo";
+      case LANG_TIGRINYA:
+        switch (sub)
+          {
+          case SUBLANG_TIGRINYA_ETHIOPIA: return "ti_ET";
+          case SUBLANG_TIGRINYA_ERITREA: return "ti_ER";
+          }
+        return "ti";
+      case LANG_TSONGA:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "ts_ZA";
+          }
+        return "ts";
+      case LANG_TSWANA:
+        /* Spoken in South Africa, Botswana.  */
+        switch (sub)
+          {
+          case SUBLANG_TSWANA_SOUTH_AFRICA: return "tn_ZA";
+          }
+        return "tn";
+      case LANG_TURKISH:
+        switch (sub)
+          {
+          case SUBLANG_TURKISH_TURKEY: return "tr_TR";
+          }
+        return "tr";
+      case LANG_TURKMEN:
+        switch (sub)
+          {
+          case SUBLANG_TURKMEN_TURKMENISTAN: return "tk_TM";
+          }
+        return "tk";
+      case LANG_UIGHUR:
+        switch (sub)
+          {
+          case SUBLANG_UIGHUR_PRC: return "ug_CN";
+          }
+        return "ug";
+      case LANG_UKRAINIAN:
+        switch (sub)
+          {
+          case SUBLANG_UKRAINIAN_UKRAINE: return "uk_UA";
+          }
+        return "uk";
+      case LANG_URDU:
+        switch (sub)
+          {
+          case SUBLANG_URDU_PAKISTAN: return "ur_PK";
+          case SUBLANG_URDU_INDIA: return "ur_IN";
+          }
+        return "ur";
+      case LANG_UZBEK:
+        switch (sub)
+          {
+          case 0x1f: return "uz";
+          case SUBLANG_UZBEK_LATIN: return "uz_UZ";
+          case 0x1e: return "uz@cyrillic";
+          case SUBLANG_UZBEK_CYRILLIC: return "uz_UZ@cyrillic";
+          }
+        return "uz";
+      case LANG_VENDA:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "ve_ZA";
+          }
+        return "ve";
+      case LANG_VIETNAMESE:
+        switch (sub)
+          {
+          case SUBLANG_VIETNAMESE_VIETNAM: return "vi_VN";
+          }
+        return "vi";
+      case LANG_WELSH:
+        switch (sub)
+          {
+          case SUBLANG_WELSH_UNITED_KINGDOM: return "cy_GB";
+          }
+        return "cy";
+      case LANG_WOLOF:
+        switch (sub)
+          {
+          case SUBLANG_WOLOF_SENEGAL: return "wo_SN";
+          }
+        return "wo";
+      case LANG_XHOSA:
+        switch (sub)
+          {
+          case SUBLANG_XHOSA_SOUTH_AFRICA: return "xh_ZA";
+          }
+        return "xh";
+      case LANG_YAKUT:
+        switch (sub)
+          {
+          case SUBLANG_YAKUT_RUSSIA: return "sah_RU";
+          }
+        return "sah";
+      case LANG_YI:
+        switch (sub)
+          {
+          case SUBLANG_YI_PRC: return "ii_CN";
+          }
+        return "ii";
+      case LANG_YIDDISH:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "yi_IL";
+          }
+        return "yi";
+      case LANG_YORUBA:
+        switch (sub)
+          {
+          case SUBLANG_YORUBA_NIGERIA: return "yo_NG";
+          }
+        return "yo";
+      case LANG_ZULU:
+        switch (sub)
+          {
+          case SUBLANG_ZULU_SOUTH_AFRICA: return "zu_ZA";
+          }
+        return "zu";
+      default: return "C";
+      }
+  }
+}
+
+# if !defined IN_LIBINTL
+static
+# endif
+const char *
+gl_locale_name_from_win32_LCID (LCID lcid)
+{
+  LANGID langid;
+
+  /* Strip off the sorting rules, keep only the language part.  */
+  langid = LANGIDFROMLCID (lcid);
+
+  return gl_locale_name_from_win32_LANGID (langid);
+}
+
+# ifdef WINDOWS_NATIVE
+
+/* Two variables to interface between get_lcid and the EnumLocales
+   callback function below.  */
+static LCID found_lcid;
+static char lname[LC_MAX * (LOCALE_NAME_MAX_LENGTH + 1) + 1];
+
+/* Callback function for EnumLocales.  */
+static BOOL CALLBACK
+enum_locales_fn (LPSTR locale_num_str)
+{
+  char *endp;
+  char locval[2 * LOCALE_NAME_MAX_LENGTH + 1 + 1];
+  LCID try_lcid = strtoul (locale_num_str, &endp, 16);
+
+  if (GetLocaleInfo (try_lcid, LOCALE_SENGLANGUAGE,
+                    locval, LOCALE_NAME_MAX_LENGTH))
+    {
+      strcat (locval, "_");
+      if (GetLocaleInfo (try_lcid, LOCALE_SENGCOUNTRY,
+                        locval + strlen (locval), LOCALE_NAME_MAX_LENGTH))
+       {
+         size_t locval_len = strlen (locval);
+
+         if (strncmp (locval, lname, locval_len) == 0
+             && (lname[locval_len] == '.'
+                 || lname[locval_len] == '\0'))
+           {
+             found_lcid = try_lcid;
+             return FALSE;
+           }
+       }
+    }
+  return TRUE;
+}
+
+/* This lock protects the get_lcid against multiple simultaneous calls.  */
+gl_lock_define_initialized(static, get_lcid_lock)
+
+/* Return the Locale ID (LCID) number given the locale's name, a
+   string, in LOCALE_NAME.  This works by enumerating all the locales
+   supported by the system, until we find one whose name matches
+   LOCALE_NAME.  */
+static LCID
+get_lcid (const char *locale_name)
+{
+  /* A simple cache.  */
+  static LCID last_lcid;
+  static char last_locale[1000];
+
+  /* Lock while looking for an LCID, to protect access to static
+     variables: last_lcid, last_locale, found_lcid, and lname.  */
+  gl_lock_lock (get_lcid_lock);
+  if (last_lcid > 0 && strcmp (locale_name, last_locale) == 0)
+    {
+      gl_lock_unlock (get_lcid_lock);
+      return last_lcid;
+    }
+  strncpy (lname, locale_name, sizeof (lname) - 1);
+  lname[sizeof (lname) - 1] = '\0';
+  found_lcid = 0;
+  EnumSystemLocales (enum_locales_fn, LCID_SUPPORTED);
+  if (found_lcid > 0)
+    {
+      last_lcid = found_lcid;
+      strcpy (last_locale, locale_name);
+    }
+  gl_lock_unlock (get_lcid_lock);
+  return found_lcid;
+}
+
+# endif
+#endif
+
+
+#if HAVE_GOOD_USELOCALE /* glibc, Mac OS X, FreeBSD >= 9.1, Cygwin >= 2.6,
+                           Solaris 11 OpenIndiana, or Solaris >= 11.4  */
+
+/* Simple hash set of strings.  We don't want to drag in lots of hash table
+   code here.  */
+
+# define SIZE_BITS (sizeof (size_t) * CHAR_BIT)
+
+/* A hash function for NUL-terminated char* strings using
+   the method described by Bruno Haible.
+   See https://www.haible.de/bruno/hashfunc.html.  */
+static size_t _GL_ATTRIBUTE_PURE
+string_hash (const void *x)
+{
+  const char *s = (const char *) x;
+  size_t h = 0;
+
+  for (; *s; s++)
+    h = *s + ((h << 9) | (h >> (SIZE_BITS - 9)));
+
+  return h;
+}
+
+/* A hash table of fixed size.  Multiple threads can access it read-only
+   simultaneously, but only one thread can insert into it at the same time.  */
+
+/* A node in a hash bucket collision list.  */
+struct struniq_hash_node
+  {
+    struct struniq_hash_node * volatile next;
+    char contents[FLEXIBLE_ARRAY_MEMBER];
+  };
+
+# define STRUNIQ_HASH_TABLE_SIZE 257
+static struct struniq_hash_node * volatile struniq_hash_table[STRUNIQ_HASH_TABLE_SIZE]
+  /* = { NULL, ..., NULL } */;
+
+/* This lock protects the struniq_hash_table against multiple simultaneous
+   insertions.  */
+gl_lock_define_initialized(static, struniq_lock)
+
+/* Store a copy of the given string in a string pool with indefinite extent.
+   Return a pointer to this copy.  */
+static const char *
+struniq (const char *string)
+{
+  size_t hashcode = string_hash (string);
+  size_t slot = hashcode % STRUNIQ_HASH_TABLE_SIZE;
+  size_t size;
+  struct struniq_hash_node *new_node;
+  struct struniq_hash_node *p;
+  for (p = struniq_hash_table[slot]; p != NULL; p = p->next)
+    if (strcmp (p->contents, string) == 0)
+      return p->contents;
+  size = strlen (string) + 1;
+  new_node =
+    (struct struniq_hash_node *)
+    malloc (FLEXSIZEOF (struct struniq_hash_node, contents, size));
+  if (new_node == NULL)
+    /* Out of memory.  Return a statically allocated string.  */
+    return "C";
+  memcpy (new_node->contents, string, size);
+  {
+    bool mt = gl_multithreaded ();
+    /* Lock while inserting new_node.  */
+    if (mt) gl_lock_lock (struniq_lock);
+    /* Check whether another thread already added the string while we were
+       waiting on the lock.  */
+    for (p = struniq_hash_table[slot]; p != NULL; p = p->next)
+      if (strcmp (p->contents, string) == 0)
+        {
+          free (new_node);
+          new_node = p;
+          goto done;
+        }
+    /* Really insert new_node into the hash table.  Fill new_node entirely
+       first, because other threads may be iterating over the linked list.  */
+    new_node->next = struniq_hash_table[slot];
+    struniq_hash_table[slot] = new_node;
+   done:
+    /* Unlock after new_node is inserted.  */
+    if (mt) gl_lock_unlock (struniq_lock);
+  }
+  return new_node->contents;
+}
+
+#endif
+
+
+#if LOCALENAME_ENHANCE_LOCALE_FUNCS
+
+/* The 'locale_t' object does not contain the names of the locale categories.
+   We have to associate them with the object through a hash table.
+   The hash table is defined in localename-table.[hc].  */
+
+/* Returns the name of a given locale category in a given locale_t object,
+   allocated as a string with indefinite extent.  */
+static const char *
+get_locale_t_name (int category, locale_t locale)
+{
+  if (locale == LC_GLOBAL_LOCALE)
+    {
+      /* Query the global locale.  */
+      const char *name = setlocale_null (category);
+      if (name != NULL)
+        return struniq (name);
+      else
+        /* Should normally not happen.  */
+        return "";
+    }
+  else
+    {
+      /* Look up the names in the hash table.  */
+      size_t hashcode = locale_hash_function (locale);
+      size_t slot = hashcode % LOCALE_HASH_TABLE_SIZE;
+      /* If the locale was not found in the table, return "".  This can
+         happen if the application uses the original newlocale()/duplocale()
+         functions instead of the overridden ones.  */
+      const char *name = "";
+      struct locale_hash_node *p;
+      /* Lock while looking up the hash node.  */
+      gl_rwlock_rdlock (locale_lock);
+      for (p = locale_hash_table[slot]; p != NULL; p = p->next)
+        if (p->locale == locale)
+          {
+            name = p->names.category_name[category];
+            break;
+          }
+      gl_rwlock_unlock (locale_lock);
+      return name;
+    }
+}
+
+# if !(defined newlocale && defined duplocale && defined freelocale)
+#  error "newlocale, duplocale, freelocale not being replaced as expected!"
+# endif
+
+/* newlocale() override.  */
+locale_t
+newlocale (int category_mask, const char *name, locale_t base)
+#undef newlocale
+{
+  struct locale_categories_names names;
+  struct locale_hash_node *node;
+  locale_t result;
+
+  /* Make sure name has indefinite extent.  */
+  if (((LC_CTYPE_MASK | LC_NUMERIC_MASK | LC_TIME_MASK | LC_COLLATE_MASK
+        | LC_MONETARY_MASK | LC_MESSAGES_MASK)
+       & category_mask) != 0)
+    name = struniq (name);
+
+  /* Determine the category names of the result.  */
+  if (((LC_CTYPE_MASK | LC_NUMERIC_MASK | LC_TIME_MASK | LC_COLLATE_MASK
+        | LC_MONETARY_MASK | LC_MESSAGES_MASK)
+       & ~category_mask) == 0)
+    {
+      /* Use name, ignore base.  */
+      int category;
+
+      name = struniq (name);
+      for (category = 0; category < 6; category++)
+        names.category_name[category] = name;
+    }
+  else
+    {
+      /* Use base, possibly also name.  */
+      if (base == NULL)
+        {
+          int category;
+
+          for (category = 0; category < 6; category++)
+            {
+              int mask;
+
+              switch (category)
+                {
+                case LC_CTYPE:
+                  mask = LC_CTYPE_MASK;
+                  break;
+                case LC_NUMERIC:
+                  mask = LC_NUMERIC_MASK;
+                  break;
+                case LC_TIME:
+                  mask = LC_TIME_MASK;
+                  break;
+                case LC_COLLATE:
+                  mask = LC_COLLATE_MASK;
+                  break;
+                case LC_MONETARY:
+                  mask = LC_MONETARY_MASK;
+                  break;
+                case LC_MESSAGES:
+                  mask = LC_MESSAGES_MASK;
+                  break;
+                default:
+                  abort ();
+                }
+              names.category_name[category] =
+                ((mask & category_mask) != 0 ? name : "C");
+            }
+        }
+      else if (base == LC_GLOBAL_LOCALE)
+        {
+          int category;
+
+          for (category = 0; category < 6; category++)
+            {
+              int mask;
+
+              switch (category)
+                {
+                case LC_CTYPE:
+                  mask = LC_CTYPE_MASK;
+                  break;
+                case LC_NUMERIC:
+                  mask = LC_NUMERIC_MASK;
+                  break;
+                case LC_TIME:
+                  mask = LC_TIME_MASK;
+                  break;
+                case LC_COLLATE:
+                  mask = LC_COLLATE_MASK;
+                  break;
+                case LC_MONETARY:
+                  mask = LC_MONETARY_MASK;
+                  break;
+                case LC_MESSAGES:
+                  mask = LC_MESSAGES_MASK;
+                  break;
+                default:
+                  abort ();
+                }
+              names.category_name[category] =
+                ((mask & category_mask) != 0
+                 ? name
+                 : get_locale_t_name (category, LC_GLOBAL_LOCALE));
+            }
+        }
+      else
+        {
+          /* Look up the names of base in the hash table.  Like multiple calls
+             of get_locale_t_name, but locking only once.  */
+          struct locale_hash_node *p;
+          int category;
+
+          /* Lock while looking up the hash node.  */
+          gl_rwlock_rdlock (locale_lock);
+          for (p = locale_hash_table[locale_hash_function (base) % LOCALE_HASH_TABLE_SIZE];
+               p != NULL;
+               p = p->next)
+            if (p->locale == base)
+              break;
+
+          for (category = 0; category < 6; category++)
+            {
+              int mask;
+
+              switch (category)
+                {
+                case LC_CTYPE:
+                  mask = LC_CTYPE_MASK;
+                  break;
+                case LC_NUMERIC:
+                  mask = LC_NUMERIC_MASK;
+                  break;
+                case LC_TIME:
+                  mask = LC_TIME_MASK;
+                  break;
+                case LC_COLLATE:
+                  mask = LC_COLLATE_MASK;
+                  break;
+                case LC_MONETARY:
+                  mask = LC_MONETARY_MASK;
+                  break;
+                case LC_MESSAGES:
+                  mask = LC_MESSAGES_MASK;
+                  break;
+                default:
+                  abort ();
+                }
+              names.category_name[category] =
+                ((mask & category_mask) != 0
+                 ? name
+                 : (p != NULL ? p->names.category_name[category] : ""));
+            }
+
+          gl_rwlock_unlock (locale_lock);
+        }
+    }
+
+  node = (struct locale_hash_node *) malloc (sizeof (struct locale_hash_node));
+  if (node == NULL)
+    /* errno is set to ENOMEM.  */
+    return NULL;
+
+  result = newlocale (category_mask, name, base);
+  if (result == NULL)
+    {
+      free (node);
+      return NULL;
+    }
+
+  /* Fill the hash node.  */
+  node->locale = result;
+  node->names = names;
+
+  /* Insert it in the hash table.  */
+  {
+    size_t hashcode = locale_hash_function (result);
+    size_t slot = hashcode % LOCALE_HASH_TABLE_SIZE;
+    struct locale_hash_node *p;
+
+    /* Lock while inserting the new node.  */
+    gl_rwlock_wrlock (locale_lock);
+    for (p = locale_hash_table[slot]; p != NULL; p = p->next)
+      if (p->locale == result)
+        {
+          /* This can happen if the application uses the original freelocale()
+             function instead of the overridden one.  */
+          p->names = node->names;
+          break;
+        }
+    if (p == NULL)
+      {
+        node->next = locale_hash_table[slot];
+        locale_hash_table[slot] = node;
+      }
+
+    gl_rwlock_unlock (locale_lock);
+
+    if (p != NULL)
+      free (node);
+  }
+
+  return result;
+}
+
+/* duplocale() override.  */
+locale_t
+duplocale (locale_t locale)
+#undef duplocale
+{
+  struct locale_hash_node *node;
+  locale_t result;
+
+  if (locale == NULL)
+    /* Invalid argument.  */
+    abort ();
+
+  node = (struct locale_hash_node *) malloc (sizeof (struct locale_hash_node));
+  if (node == NULL)
+    /* errno is set to ENOMEM.  */
+    return NULL;
+
+  result = duplocale (locale);
+  if (result == NULL)
+    {
+      free (node);
+      return NULL;
+    }
+
+  /* Fill the hash node.  */
+  node->locale = result;
+  if (locale == LC_GLOBAL_LOCALE)
+    {
+      int category;
+
+      for (category = 0; category < 6; category++)
+        node->names.category_name[category] =
+          get_locale_t_name (category, LC_GLOBAL_LOCALE);
+
+      /* Lock before inserting the new node.  */
+      gl_rwlock_wrlock (locale_lock);
+    }
+  else
+    {
+      struct locale_hash_node *p;
+
+      /* Lock once, for the lookup and the insertion.  */
+      gl_rwlock_wrlock (locale_lock);
+
+      for (p = locale_hash_table[locale_hash_function (locale) % LOCALE_HASH_TABLE_SIZE];
+           p != NULL;
+           p = p->next)
+        if (p->locale == locale)
+          break;
+      if (p != NULL)
+        node->names = p->names;
+      else
+        {
+          /* This can happen if the application uses the original
+             newlocale()/duplocale() functions instead of the overridden
+             ones.  */
+          int category;
+
+          for (category = 0; category < 6; category++)
+            node->names.category_name[category] = "";
+        }
+    }
+
+  /* Insert it in the hash table.  */
+  {
+    size_t hashcode = locale_hash_function (result);
+    size_t slot = hashcode % LOCALE_HASH_TABLE_SIZE;
+    struct locale_hash_node *p;
+
+    for (p = locale_hash_table[slot]; p != NULL; p = p->next)
+      if (p->locale == result)
+        {
+          /* This can happen if the application uses the original freelocale()
+             function instead of the overridden one.  */
+          p->names = node->names;
+          break;
+        }
+    if (p == NULL)
+      {
+        node->next = locale_hash_table[slot];
+        locale_hash_table[slot] = node;
+      }
+
+    gl_rwlock_unlock (locale_lock);
+
+    if (p != NULL)
+      free (node);
+  }
+
+  return result;
+}
+
+/* freelocale() override.  */
+void
+freelocale (locale_t locale)
+#undef freelocale
+{
+  if (locale == NULL || locale == LC_GLOBAL_LOCALE)
+    /* Invalid argument.  */
+    abort ();
+
+  {
+    size_t hashcode = locale_hash_function (locale);
+    size_t slot = hashcode % LOCALE_HASH_TABLE_SIZE;
+    struct locale_hash_node *found;
+    struct locale_hash_node **p;
+
+    found = NULL;
+    /* Lock while removing the hash node.  */
+    gl_rwlock_wrlock (locale_lock);
+    for (p = &locale_hash_table[slot]; *p != NULL; p = &(*p)->next)
+      if ((*p)->locale == locale)
+        {
+          found = *p;
+          *p = (*p)->next;
+          break;
+        }
+    gl_rwlock_unlock (locale_lock);
+    free (found);
+  }
+
+  freelocale (locale);
+}
+
+#endif
+
+
+#if defined IN_LIBINTL || HAVE_GOOD_USELOCALE
+
+/* Like gl_locale_name_thread, except that the result is not in storage of
+   indefinite extent.  */
+# if !defined IN_LIBINTL
+static
+# endif
+const char *
+gl_locale_name_thread_unsafe (int category, const char *categoryname _GL_UNUSED)
+{
+# if HAVE_GOOD_USELOCALE
+  {
+    locale_t thread_locale = uselocale (NULL);
+    if (thread_locale != LC_GLOBAL_LOCALE)
+      {
+#  if __GLIBC__ >= 2 && !defined __UCLIBC__
+        /* Work around an incorrect definition of the _NL_LOCALE_NAME macro in
+           glibc < 2.12.
+           See <https://sourceware.org/bugzilla/show_bug.cgi?id=10968>.  */
+        const char *name =
+          nl_langinfo (_NL_ITEM ((category), _NL_ITEM_INDEX (-1)));
+        if (name[0] == '\0')
+          /* Fallback code for glibc < 2.4, which did not implement
+             nl_langinfo (_NL_LOCALE_NAME (category)).  */
+          name = thread_locale->__names[category];
+        return name;
+#  elif defined __linux__ && HAVE_LANGINFO_H && defined NL_LOCALE_NAME
+        /* musl libc */
+        return nl_langinfo_l (NL_LOCALE_NAME (category), thread_locale);
+#  elif (defined __FreeBSD__ || defined __DragonFly__) || (defined __APPLE__ && defined __MACH__)
+        /* FreeBSD, Mac OS X */
+        int mask;
+
+        switch (category)
+          {
+          case LC_CTYPE:
+            mask = LC_CTYPE_MASK;
+            break;
+          case LC_NUMERIC:
+            mask = LC_NUMERIC_MASK;
+            break;
+          case LC_TIME:
+            mask = LC_TIME_MASK;
+            break;
+          case LC_COLLATE:
+            mask = LC_COLLATE_MASK;
+            break;
+          case LC_MONETARY:
+            mask = LC_MONETARY_MASK;
+            break;
+          case LC_MESSAGES:
+            mask = LC_MESSAGES_MASK;
+            break;
+          default: /* We shouldn't get here.  */
+            return "";
+          }
+        return querylocale (mask, thread_locale);
+#  elif defined __sun
+#   if HAVE_GETLOCALENAME_L
+        /* Solaris >= 12.  */
+        return getlocalename_l (category, thread_locale);
+#   elif HAVE_SOLARIS114_LOCALES
+        /* Solaris >= 11.4.  */
+        void *lcp = (*thread_locale)->core.data->lcp;
+        if (lcp != NULL)
+          switch (category)
+            {
+            case LC_CTYPE:
+            case LC_NUMERIC:
+            case LC_TIME:
+            case LC_COLLATE:
+            case LC_MONETARY:
+            case LC_MESSAGES:
+              return ((const char * const *) lcp)[category];
+            default: /* We shouldn't get here.  */
+              return "";
+            }
+#   elif HAVE_NAMELESS_LOCALES
+        return get_locale_t_name (category, thread_locale);
+#   else
+        /* Solaris 11 OpenIndiana.
+           For the internal structure of locale objects, see
+           https://github.com/OpenIndiana/illumos-gate/blob/master/usr/src/lib/libc/port/locale/localeimpl.h  */
+        switch (category)
+          {
+          case LC_CTYPE:
+          case LC_NUMERIC:
+          case LC_TIME:
+          case LC_COLLATE:
+          case LC_MONETARY:
+          case LC_MESSAGES:
+            return ((const char * const *) thread_locale)[category];
+          default: /* We shouldn't get here.  */
+            return "";
+          }
+#   endif
+#  elif defined _AIX && HAVE_NAMELESS_LOCALES
+        return get_locale_t_name (category, thread_locale);
+#  elif defined __CYGWIN__
+        /* Cygwin < 2.6 lacks uselocale and thread-local locales altogether.
+           Cygwin <= 2.6.1 lacks NL_LOCALE_NAME, requiring peeking inside
+           an opaque struct.  */
+#   ifdef NL_LOCALE_NAME
+        return nl_langinfo_l (NL_LOCALE_NAME (category), thread_locale);
+#   else
+        /* FIXME: Remove when we can assume new-enough Cygwin.  */
+        struct __locale_t {
+          char categories[7][32];
+        };
+        return ((struct __locale_t *) thread_locale)->categories[category];
+#   endif
+#  elif defined __ANDROID__
+        return MB_CUR_MAX == 4 ? "C.UTF-8" : "C";
+#  endif
+      }
+  }
+# endif
+  return NULL;
+}
+
+#endif
+
+const char *
+gl_locale_name_thread (int category, const char *categoryname _GL_UNUSED)
+{
+#if HAVE_GOOD_USELOCALE
+  const char *name = gl_locale_name_thread_unsafe (category, categoryname);
+  if (name != NULL)
+    return struniq (name);
+#endif
+  /* On WINDOWS_NATIVE, don't use GetThreadLocale() here, because when
+     SetThreadLocale has not been called - which is a very frequent case -
+     the value of GetThreadLocale() ignores past calls to 'setlocale'.  */
+  return NULL;
+}
+
+/* XPG3 defines the result of 'setlocale (category, NULL)' as:
+   "Directs 'setlocale()' to query 'category' and return the current
+    setting of 'local'."
+   However it does not specify the exact format.  Neither do SUSV2 and
+   ISO C 99.  So we can use this feature only on selected systems (e.g.
+   those using GNU C Library).  */
+#if defined _LIBC || ((defined __GLIBC__ && __GLIBC__ >= 2) && !defined __UCLIBC__)
+# define HAVE_LOCALE_NULL
+#endif
+
+const char *
+gl_locale_name_posix (int category, const char *categoryname _GL_UNUSED)
+{
+#if defined WINDOWS_NATIVE
+  if (LC_MIN <= category && category <= LC_MAX)
+    {
+      const char *locname =
+        /* setlocale_null (category) is identical to setlocale (category, NULL)
+           on this platform.  */
+        setlocale (category, NULL);
+
+      /* Convert locale name to LCID.  We don't want to use
+         LocaleNameToLCID because (a) it is only available since Vista,
+         and (b) it doesn't accept locale names returned by 'setlocale'.  */
+      LCID lcid = get_lcid (locname);
+
+      if (lcid > 0)
+        return gl_locale_name_from_win32_LCID (lcid);
+    }
+#endif
+  {
+    const char *locname;
+
+    /* Use the POSIX methods of looking to 'LC_ALL', 'LC_xxx', and 'LANG'.
+       On some systems this can be done by the 'setlocale' function itself.  */
+#if defined HAVE_LC_MESSAGES && defined HAVE_LOCALE_NULL
+    locname = setlocale_null (category);
+#else
+    /* On other systems we ignore what setlocale reports and instead look at the
+       environment variables directly.  This is necessary
+         1. on systems which have a facility for customizing the default locale
+            (Mac OS X, native Windows, Cygwin) and where the system's setlocale()
+            function ignores this default locale (Mac OS X, Cygwin), in two cases:
+            a. when the user missed to use the setlocale() override from libintl
+               (for example by not including <libintl.h>),
+            b. when setlocale supports only the "C" locale, such as on Cygwin
+               1.5.x.  In this case even the override from libintl cannot help.
+         2. on all systems where setlocale supports only the "C" locale.  */
+    /* Strictly speaking, it is a POSIX violation to look at the environment
+       variables regardless whether setlocale has been called or not.  POSIX
+       says:
+           "For C-language programs, the POSIX locale shall be the
+            default locale when the setlocale() function is not called."
+       But we assume that all programs that use internationalized APIs call
+       setlocale (LC_ALL, "").  */
+    locname = gl_locale_name_environ (category, categoryname);
+#endif
+    /* Convert the locale name from the format returned by setlocale() or found
+       in the environment variables to the XPG syntax.  */
+#if defined WINDOWS_NATIVE
+    if (locname != NULL)
+      {
+        /* Convert locale name to LCID.  We don't want to use
+           LocaleNameToLCID because (a) it is only available since Vista,
+           and (b) it doesn't accept locale names returned by 'setlocale'.  */
+        LCID lcid = get_lcid (locname);
+
+        if (lcid > 0)
+          return gl_locale_name_from_win32_LCID (lcid);
+      }
+#endif
+    return locname;
+  }
+}
+
+const char *
+gl_locale_name_environ (int category _GL_UNUSED, const char *categoryname)
+{
+  const char *retval;
+
+  /* Setting of LC_ALL overrides all other.  */
+  retval = getenv ("LC_ALL");
+  if (retval != NULL && retval[0] != '\0')
+    return retval;
+  /* Next comes the name of the desired category.  */
+  retval = getenv (categoryname);
+  if (retval != NULL && retval[0] != '\0')
+    return retval;
+  /* Last possibility is the LANG environment variable.  */
+  retval = getenv ("LANG");
+  if (retval != NULL && retval[0] != '\0')
+    {
+#if HAVE_CFPREFERENCESCOPYAPPVALUE
+      /* Mac OS X 10.2 or newer.
+         Ignore invalid LANG value set by the Terminal application.  */
+      if (strcmp (retval, "UTF-8") != 0)
+#endif
+#if defined __CYGWIN__
+      /* Cygwin.
+         Ignore dummy LANG value set by ~/.profile.  */
+      if (strcmp (retval, "C.UTF-8") != 0)
+#endif
+        return retval;
+    }
+
+  return NULL;
+}
+
+const char *
+gl_locale_name_default (void)
+{
+  /* POSIX:2001 says:
+     "All implementations shall define a locale as the default locale, to be
+      invoked when no environment variables are set, or set to the empty
+      string.  This default locale can be the POSIX locale or any other
+      implementation-defined locale.  Some implementations may provide
+      facilities for local installation administrators to set the default
+      locale, customizing it for each location.  POSIX:2001 does not require
+      such a facility.
+
+     The systems with such a facility are Mac OS X and Windows: They provide a
+     GUI that allows the user to choose a locale.
+       - On Mac OS X, by default, none of LC_* or LANG are set.  Starting with
+         Mac OS X 10.4 or 10.5, LANG is set for processes launched by the
+         'Terminal' application (but sometimes to an incorrect value "UTF-8").
+         When no environment variable is set, setlocale (LC_ALL, "") uses the
+         "C" locale.
+       - On native Windows, by default, none of LC_* or LANG are set.
+         When no environment variable is set, setlocale (LC_ALL, "") uses the
+         locale chosen by the user.
+       - On Cygwin 1.5.x, by default, none of LC_* or LANG are set.
+         When no environment variable is set, setlocale (LC_ALL, "") uses the
+         "C" locale.
+       - On Cygwin 1.7, by default, LANG is set to "C.UTF-8" when the default
+         ~/.profile is executed.
+         When no environment variable is set, setlocale (LC_ALL, "") uses the
+         "C.UTF-8" locale, which operates in the same way as the "C" locale.
+  */
+
+#if !(HAVE_CFPREFERENCESCOPYAPPVALUE || defined WINDOWS_NATIVE || defined __CYGWIN__)
+
+  /* The system does not have a way of setting the locale, other than the
+     POSIX specified environment variables.  We use C as default locale.  */
+  return "C";
+
+#else
+
+  /* Return an XPG style locale name language[_territory][@modifier].
+     Don't even bother determining the codeset; it's not useful in this
+     context, because message catalogs are not specific to a single
+     codeset.  */
+
+# if HAVE_CFPREFERENCESCOPYAPPVALUE
+  /* Mac OS X 10.4 or newer */
+  /* Don't use the API introduced in Mac OS X 10.5, CFLocaleCopyCurrent,
+     because in macOS 10.13.4 it has the following behaviour:
+     When two or more languages are specified in the
+     "System Preferences > Language & Region > Preferred Languages" panel,
+     it returns en_CC where CC is the territory (even when English is not among
+     the preferred languages!).  What we want instead is what
+     CFLocaleCopyCurrent returned in earlier macOS releases and what
+     CFPreferencesCopyAppValue still returns, namely ll_CC where ll is the
+     first among the preferred languages and CC is the territory.  */
+  {
+    /* Cache the locale name, since CoreFoundation calls are expensive.  */
+    static const char *cached_localename;
+
+    if (cached_localename == NULL)
+      {
+        char namebuf[256];
+        CFTypeRef value =
+          CFPreferencesCopyAppValue (CFSTR ("AppleLocale"),
+                                     kCFPreferencesCurrentApplication);
+        if (value != NULL && CFGetTypeID (value) == CFStringGetTypeID ())
+          {
+            CFStringRef name = (CFStringRef)value;
+
+            if (CFStringGetCString (name, namebuf, sizeof (namebuf),
+                                    kCFStringEncodingASCII))
+              {
+                gl_locale_name_canonicalize (namebuf);
+                cached_localename = strdup (namebuf);
+              }
+          }
+        if (cached_localename == NULL)
+          cached_localename = "C";
+      }
+    return cached_localename;
+  }
+
+# endif
+
+# if defined WINDOWS_NATIVE || defined __CYGWIN__ /* Native Windows or Cygwin */
+  {
+    LCID lcid;
+
+    /* Use native Windows API locale ID.  */
+    lcid = GetThreadLocale ();
+
+    return gl_locale_name_from_win32_LCID (lcid);
+  }
+# endif
+#endif
+}
+
+/* Determine the current locale's name, and canonicalize it into XPG syntax
+     language[_territory][.codeset][@modifier]
+   The codeset part in the result is not reliable; the locale_charset()
+   should be used for codeset information instead.
+   The result must not be freed; it is statically allocated.  */
+
+const char *
+gl_locale_name (int category, const char *categoryname)
+{
+  const char *retval;
+
+  retval = gl_locale_name_thread (category, categoryname);
+  if (retval != NULL)
+    return retval;
+
+  retval = gl_locale_name_posix (category, categoryname);
+  if (retval != NULL)
+    return retval;
+
+  return gl_locale_name_default ();
+}
diff --git a/src/grep/gnulib-tests/localename.h b/src/grep/gnulib-tests/localename.h
new file mode 100644
index 0000000..1260aec
--- /dev/null
+++ b/src/grep/gnulib-tests/localename.h
@@ -0,0 +1,98 @@
+/* Determine name of the currently selected locale.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation; either version 2.1 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GL_LOCALENAME_H
+#define _GL_LOCALENAME_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Determine the current locale's name.
+   It considers both the POSIX notion of locale name (see functions
+   gl_locale_name_thread and gl_locale_name_posix) and the system notion
+   of locale name (see function gl_locale_name_default).
+   CATEGORY is a locale category abbreviation, as defined in <locale.h>,
+   but not LC_ALL. E.g. LC_MESSAGES.
+   CATEGORYNAME is the name of CATEGORY as a string, e.g. "LC_MESSAGES".
+   Return the locale category's name, canonicalized into XPG syntax
+     language[_territory][.codeset][@modifier]
+   The codeset part in the result is not reliable; the locale_charset()
+   should be used for codeset information instead.
+   The result must not be freed; it is statically allocated.  */
+extern const char * gl_locale_name (int category, const char *categoryname);
+
+/* Determine the current per-thread locale's name, as specified by uselocale()
+   calls.
+   CATEGORY is a locale category abbreviation, as defined in <locale.h>,
+   but not LC_ALL. E.g. LC_MESSAGES.
+   CATEGORYNAME is the name of CATEGORY as a string, e.g. "LC_MESSAGES".
+   Return the locale category's name, canonicalized into XPG syntax
+     language[_territory][.codeset][@modifier]
+   or NULL if no locale has been specified for the current thread.
+   The codeset part in the result is not reliable; the locale_charset()
+   should be used for codeset information instead.
+   The result must not be freed; it is statically allocated.  */
+extern const char * gl_locale_name_thread (int category, const char *categoryname);
+
+/* Determine the thread-independent current locale's name, as specified by
+   setlocale() calls or by environment variables.
+   CATEGORY is a locale category abbreviation, as defined in <locale.h>,
+   but not LC_ALL. E.g. LC_MESSAGES.
+   CATEGORYNAME is the name of CATEGORY as a string, e.g. "LC_MESSAGES".
+   Return the locale category's name, canonicalized into XPG syntax
+     language[_territory][.codeset][@modifier]
+   or NULL if no locale has been specified to setlocale() or by environment
+   variables.
+   The codeset part in the result is not reliable; the locale_charset()
+   should be used for codeset information instead.
+   The result must not be freed; it is statically allocated.  */
+extern const char * gl_locale_name_posix (int category, const char *categoryname);
+
+/* Determine the default locale's name, as specified by environment
+   variables.
+   Return the locale category's name, or NULL if no locale has been specified
+   by environment variables.
+   The result must not be freed; it is statically allocated.  */
+extern const char * gl_locale_name_environ (int category, const char *categoryname);
+
+/* Determine the default locale's name.  This is the current locale's name,
+   if not specified by uselocale() calls, by setlocale() calls, or by
+   environment variables.  This locale name is usually determined by systems
+   settings that the user can manipulate through a GUI.
+
+   Quoting POSIX:2001:
+     "All implementations shall define a locale as the default locale,
+      to be invoked when no environment variables are set, or set to the
+      empty string.  This default locale can be the C locale or any other
+      implementation-defined locale.  Some implementations may provide
+      facilities for local installation administrators to set the default
+      locale, customizing it for each location.  IEEE Std 1003.1-2001 does
+      not require such a facility."
+
+   The result must not be freed; it is statically allocated.  */
+extern const char * gl_locale_name_default (void)
+#if !(HAVE_CFPREFERENCESCOPYAPPVALUE || defined _WIN32 || defined __CYGWIN__)
+  _GL_ATTRIBUTE_CONST
+#endif
+  ;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _GL_LOCALENAME_H */
diff --git a/src/grep/gnulib-tests/macros.h b/src/grep/gnulib-tests/macros.h
new file mode 100644
index 0000000..fccfc50
--- /dev/null
+++ b/src/grep/gnulib-tests/macros.h
@@ -0,0 +1,109 @@
+/* Common macros used by gnulib tests.
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+
+/* This file contains macros that are used by many gnulib tests.
+   Put here only frequently used macros, say, used by 10 tests or more.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifndef FALLTHROUGH
+# if (__GNUC__ >= 7) || (__clang_major__ >= 10)
+#  define FALLTHROUGH __attribute__ ((__fallthrough__))
+# else
+#  define FALLTHROUGH ((void) 0)
+# endif
+#endif
+
+/* Define ASSERT_STREAM before including this file if ASSERT must
+   target a stream other than stderr.  */
+#ifndef ASSERT_STREAM
+# define ASSERT_STREAM stderr
+#endif
+
+/* ASSERT (condition);
+   verifies that the specified condition is fulfilled.  If not, a message
+   is printed to ASSERT_STREAM if defined (defaulting to stderr if
+   undefined) and the program is terminated with an error code.
+
+   This macro has the following properties:
+     - The programmer specifies the expected condition, not the failure
+       condition.  This simplifies thinking.
+     - The condition is tested always, regardless of compilation flags.
+       (Unlike the macro from <assert.h>.)
+     - On Unix platforms, the tester can debug the test program with a
+       debugger (provided core dumps are enabled: "ulimit -c unlimited").
+     - For the sake of platforms where no debugger is available (such as
+       some mingw systems), an error message is printed on the error
+       stream that includes the source location of the ASSERT invocation.
+ */
+#define ASSERT(expr) \
+  do                                                                         \
+    {                                                                        \
+      if (!(expr))                                                           \
+        {                                                                    \
+          fprintf (ASSERT_STREAM, "%s:%d: assertion '%s' failed\n",          \
+                   __FILE__, __LINE__, #expr);                               \
+          fflush (ASSERT_STREAM);                                            \
+          abort ();                                                          \
+        }                                                                    \
+    }                                                                        \
+  while (0)
+
+/* Like ASSERT, except that it uses no stdio.
+   Requires #include <string.h> and #include <unistd.h>.  */
+#define ASSERT_NO_STDIO(expr) \
+  do                                                        \
+    {                                                       \
+      if (!(expr))                                          \
+        {                                                   \
+          WRITE_TO_STDERR (__FILE__);                       \
+          WRITE_TO_STDERR (":");                            \
+          WRITE_MACROEXPANDED_INTEGER_TO_STDERR (__LINE__); \
+          WRITE_TO_STDERR (": assertion '");                \
+          WRITE_TO_STDERR (#expr);                          \
+          WRITE_TO_STDERR ("' failed\n");                   \
+          abort ();                                         \
+        }                                                   \
+    }                                                       \
+  while (0)
+#define WRITE_MACROEXPANDED_INTEGER_TO_STDERR(integer) \
+  WRITE_INTEGER_TO_STDERR(integer)
+#define WRITE_INTEGER_TO_STDERR(integer) \
+  WRITE_TO_STDERR (#integer)
+#define WRITE_TO_STDERR(string_literal) \
+  {                                     \
+    const char *s = string_literal;     \
+    int ret = write (2, s, strlen (s)); \
+    (void) ret;                         \
+  }
+
+/* SIZEOF (array)
+   returns the number of elements of an array.  It works for arrays that are
+   declared outside functions and for local variables of array type.  It does
+   *not* work for function parameters of array type, because they are actually
+   parameters of pointer type.  */
+#define SIZEOF(array) (sizeof (array) / sizeof (array[0]))
+
+/* STREQ (str1, str2)
+   Return true if two strings compare equal.  */
+#define STREQ(a, b) (strcmp (a, b) == 0)
+
+/* Some numbers in the interval [0,1).  */
+extern const float randomf[1000];
+extern const double randomd[1000];
+extern const long double randoml[1000];
diff --git a/src/grep/gnulib-tests/mmap-anon-util.h b/src/grep/gnulib-tests/mmap-anon-util.h
new file mode 100644
index 0000000..b526cb6
--- /dev/null
+++ b/src/grep/gnulib-tests/mmap-anon-util.h
@@ -0,0 +1,99 @@
+/* Some auxiliary stuff for using mmap & friends.
+   Copyright (C) 2002-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible.  */
+
+#if defined _WIN32 && !defined __CYGWIN__
+
+/* ------------------------ Windows ------------------------ */
+
+# define WIN32_LEAN_AND_MEAN /* avoid including junk */
+# include <windows.h>
+# include <winerror.h>
+# define PROT_NONE PAGE_NOACCESS
+# define PROT_READ PAGE_READONLY
+# define PROT_READ_WRITE PAGE_READWRITE
+
+static void *
+mmap_zeromap (void *map_addr_hint, size_t map_len)
+{
+  if (VirtualAlloc ((void *)((uintptr_t) map_addr_hint & -0x10000),
+                    (((uintptr_t) map_addr_hint + map_len - 1) | 0xffff) + 1
+                    - ((uintptr_t) map_addr_hint & -0x10000),
+                    MEM_RESERVE, PAGE_NOACCESS)
+      && VirtualAlloc (map_addr_hint, map_len, MEM_COMMIT, PAGE_READWRITE))
+    return map_addr_hint;
+  else
+    return (void *)(-1);
+}
+
+int
+munmap (void *addr, size_t len)
+{
+  if (VirtualFree (addr, len, MEM_DECOMMIT))
+    return 0;
+  else
+    return -1;
+}
+
+int
+mprotect (void *addr, size_t len, int prot)
+{
+  DWORD oldprot;
+
+  if (VirtualProtect (addr, len, prot, &oldprot))
+    return 0;
+  else
+    return -1;
+}
+
+#else
+
+/* ------------------------ Unix ------------------------ */
+
+# include <sys/types.h>
+# include <sys/mman.h>
+# include <fcntl.h>
+
+# ifndef PROT_NONE
+#  define PROT_NONE 0
+# endif
+# define PROT_READ_WRITE  (PROT_READ|PROT_WRITE)
+
+# if HAVE_MAP_ANONYMOUS
+#  define zero_fd -1
+#  define map_flags MAP_ANONYMOUS | MAP_PRIVATE
+# else
+#  ifndef MAP_FILE
+#   define MAP_FILE 0
+#  endif
+static int zero_fd;
+#  define map_flags MAP_FILE | MAP_PRIVATE
+# endif
+
+static void *
+mmap_zeromap (void *map_addr_hint, size_t map_len)
+{
+# ifdef __hpux
+  /* HP-UX 10 mmap() often fails when given a hint.  So give the OS complete
+     freedom about the address range.  */
+  return (void *) mmap ((void *) 0,    map_len, PROT_READ_WRITE, map_flags, zero_fd, 0);
+# else
+  return (void *) mmap (map_addr_hint, map_len, PROT_READ_WRITE, map_flags, zero_fd, 0);
+# endif
+}
+
+#endif
diff --git a/src/grep/gnulib-tests/nanosleep.c b/src/grep/gnulib-tests/nanosleep.c
new file mode 100644
index 0000000..10990dc
--- /dev/null
+++ b/src/grep/gnulib-tests/nanosleep.c
@@ -0,0 +1,276 @@
+/* Provide a replacement for the POSIX nanosleep function.
+
+   Copyright (C) 1999-2000, 2002, 2004-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering
+   and Bruno Haible for the native Windows part */
+
+#include <config.h>
+
+#include <time.h>
+
+#include "intprops.h"
+#include "sig-handler.h"
+#include "verify.h"
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/select.h>
+#include <signal.h>
+
+#include <sys/time.h>
+#include <errno.h>
+
+#include <unistd.h>
+
+
+enum { BILLION = 1000 * 1000 * 1000 };
+
+#if HAVE_BUG_BIG_NANOSLEEP
+
+int
+nanosleep (const struct timespec *requested_delay,
+           struct timespec *remaining_delay)
+# undef nanosleep
+{
+  /* nanosleep mishandles large sleeps due to internal overflow problems.
+     The worst known case of this is Linux 2.6.9 with glibc 2.3.4, which
+     can't sleep more than 24.85 days (2^31 milliseconds).  Similarly,
+     cygwin 1.5.x, which can't sleep more than 49.7 days (2^32 milliseconds).
+     Solve this by breaking the sleep up into smaller chunks.  */
+
+  if (requested_delay->tv_nsec < 0 || BILLION <= requested_delay->tv_nsec)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+  {
+    /* Verify that time_t is large enough.  */
+    verify (TYPE_MAXIMUM (time_t) / 24 / 24 / 60 / 60);
+    const time_t limit = 24 * 24 * 60 * 60;
+    time_t seconds = requested_delay->tv_sec;
+    struct timespec intermediate;
+    intermediate.tv_nsec = requested_delay->tv_nsec;
+
+    while (limit < seconds)
+      {
+        int result;
+        intermediate.tv_sec = limit;
+        result = nanosleep (&intermediate, remaining_delay);
+        seconds -= limit;
+        if (result)
+          {
+            if (remaining_delay)
+              remaining_delay->tv_sec += seconds;
+            return result;
+          }
+        intermediate.tv_nsec = 0;
+      }
+    intermediate.tv_sec = seconds;
+    return nanosleep (&intermediate, remaining_delay);
+  }
+}
+
+#elif defined _WIN32 && ! defined __CYGWIN__
+/* Native Windows platforms.  */
+
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+
+/* The Windows API function Sleep() has a resolution of about 15 ms and takes
+   at least 5 ms to execute.  We use this function for longer time periods.
+   Additionally, we use busy-looping over short time periods, to get a
+   resolution of about 0.01 ms.  In order to measure such short timespans,
+   we use the QueryPerformanceCounter() function.  */
+
+int
+nanosleep (const struct timespec *requested_delay,
+           struct timespec *remaining_delay)
+{
+  static bool initialized;
+  /* Number of performance counter increments per nanosecond,
+     or zero if it could not be determined.  */
+  static double ticks_per_nanosecond;
+
+  if (requested_delay->tv_nsec < 0 || BILLION <= requested_delay->tv_nsec)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+  /* For requested delays of one second or more, 15ms resolution is
+     sufficient.  */
+  if (requested_delay->tv_sec == 0)
+    {
+      if (!initialized)
+        {
+          /* Initialize ticks_per_nanosecond.  */
+          LARGE_INTEGER ticks_per_second;
+
+          if (QueryPerformanceFrequency (&ticks_per_second))
+            ticks_per_nanosecond =
+              (double) ticks_per_second.QuadPart / 1000000000.0;
+
+          initialized = true;
+        }
+      if (ticks_per_nanosecond)
+        {
+          /* QueryPerformanceFrequency worked.  We can use
+             QueryPerformanceCounter.  Use a combination of Sleep and
+             busy-looping.  */
+          /* Number of milliseconds to pass to the Sleep function.
+             Since Sleep can take up to 8 ms less or 8 ms more than requested
+             (or maybe more if the system is loaded), we subtract 10 ms.  */
+          int sleep_millis = (int) requested_delay->tv_nsec / 1000000 - 10;
+          /* Determine how many ticks to delay.  */
+          LONGLONG wait_ticks = requested_delay->tv_nsec * ticks_per_nanosecond;
+          /* Start.  */
+          LARGE_INTEGER counter_before;
+          if (QueryPerformanceCounter (&counter_before))
+            {
+              /* Wait until the performance counter has reached this value.
+                 We don't need to worry about overflow, because the performance
+                 counter is reset at reboot, and with a frequency of 3.6E6
+                 ticks per second 63 bits suffice for over 80000 years.  */
+              LONGLONG wait_until = counter_before.QuadPart + wait_ticks;
+              /* Use Sleep for the longest part.  */
+              if (sleep_millis > 0)
+                Sleep (sleep_millis);
+              /* Busy-loop for the rest.  */
+              for (;;)
+                {
+                  LARGE_INTEGER counter_after;
+                  if (!QueryPerformanceCounter (&counter_after))
+                    /* QueryPerformanceCounter failed, but succeeded earlier.
+                       Should not happen.  */
+                    break;
+                  if (counter_after.QuadPart >= wait_until)
+                    /* The requested time has elapsed.  */
+                    break;
+                }
+              goto done;
+            }
+        }
+    }
+  /* Implementation for long delays and as fallback.  */
+  Sleep (requested_delay->tv_sec * 1000 + requested_delay->tv_nsec / 1000000);
+
+ done:
+  /* Sleep is not interruptible.  So there is no remaining delay.  */
+  if (remaining_delay != NULL)
+    {
+      remaining_delay->tv_sec = 0;
+      remaining_delay->tv_nsec = 0;
+    }
+  return 0;
+}
+
+#else
+/* Unix platforms lacking nanosleep. */
+
+/* Some systems (MSDOS) don't have SIGCONT.
+   Using SIGTERM here turns the signal-handling code below
+   into a no-op on such systems. */
+# ifndef SIGCONT
+#  define SIGCONT SIGTERM
+# endif
+
+static sig_atomic_t volatile suspended;
+
+/* Handle SIGCONT. */
+
+static _GL_ASYNC_SAFE void
+sighandler (int sig)
+{
+  suspended = 1;
+}
+
+/* Suspend execution for at least *TS_DELAY seconds.  */
+
+static int
+my_usleep (const struct timespec *ts_delay)
+{
+  struct timeval tv_delay;
+  tv_delay.tv_sec = ts_delay->tv_sec;
+  tv_delay.tv_usec = (ts_delay->tv_nsec + 999) / 1000;
+  if (tv_delay.tv_usec == 1000000)
+    {
+      if (tv_delay.tv_sec == TYPE_MAXIMUM (time_t))
+        tv_delay.tv_usec = 1000000 - 1; /* close enough */
+      else
+        {
+          tv_delay.tv_sec++;
+          tv_delay.tv_usec = 0;
+        }
+    }
+  return select (0, NULL, NULL, NULL, &tv_delay);
+}
+
+/* Suspend execution for at least *REQUESTED_DELAY seconds.  The
+   *REMAINING_DELAY part isn't implemented yet.  */
+
+int
+nanosleep (const struct timespec *requested_delay,
+           struct timespec *remaining_delay)
+{
+  static bool initialized;
+
+  if (requested_delay->tv_nsec < 0 || BILLION <= requested_delay->tv_nsec)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+  /* set up sig handler */
+  if (! initialized)
+    {
+      struct sigaction oldact;
+
+      sigaction (SIGCONT, NULL, &oldact);
+      if (get_handler (&oldact) != SIG_IGN)
+        {
+          struct sigaction newact;
+
+          newact.sa_handler = sighandler;
+          sigemptyset (&newact.sa_mask);
+          newact.sa_flags = 0;
+          sigaction (SIGCONT, &newact, NULL);
+        }
+      initialized = true;
+    }
+
+  suspended = 0;
+
+  if (my_usleep (requested_delay) == -1)
+    {
+      if (suspended)
+        {
+          /* Calculate time remaining.  */
+          /* FIXME: the code in sleep doesn't use this, so there's no
+             rush to implement it.  */
+
+          errno = EINTR;
+        }
+      return -1;
+    }
+
+  /* FIXME: Restore sig handler?  */
+
+  return 0;
+}
+#endif
diff --git a/src/grep/gnulib-tests/nap.h b/src/grep/gnulib-tests/nap.h
new file mode 100644
index 0000000..3d0a51d
--- /dev/null
+++ b/src/grep/gnulib-tests/nap.h
@@ -0,0 +1,162 @@
+/* Assist in file system timestamp tests.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#ifndef GLTEST_NAP_H
+# define GLTEST_NAP_H
+
+# include <limits.h>
+# include <stdbool.h>
+
+# include <intprops.h>
+
+/* Avoid a conflict with a function called nap() on UnixWare.  */
+# if defined _SCO_DS || (defined __SCO_VERSION__ || defined __sysv5__)  /* OpenServer, UnixWare */
+#  include <unistd.h>
+#  undef nap
+#  define nap gl_nap
+# endif
+
+/* Name of the witness file.  */
+#define TEMPFILE BASE "nap.tmp"
+
+/* File descriptor used for the witness file.  */
+static int nap_fd = -1;
+
+/* Return A - B, in ns.
+   Return 0 if the true result would be negative.
+   Return INT_MAX if the true result would be greater than INT_MAX.  */
+static int
+diff_timespec (struct timespec a, struct timespec b)
+{
+  time_t as = a.tv_sec;
+  time_t bs = b.tv_sec;
+  int ans = a.tv_nsec;
+  int bns = b.tv_nsec;
+  int sdiff;
+
+  ASSERT (0 <= ans && ans < 2000000000);
+  ASSERT (0 <= bns && bns < 2000000000);
+
+  if (! (bs < as || (bs == as && bns < ans)))
+    return 0;
+
+  if (INT_SUBTRACT_WRAPV (as, bs, &sdiff)
+      || INT_MULTIPLY_WRAPV (sdiff, 1000000000, &sdiff)
+      || INT_ADD_WRAPV (sdiff, ans - bns, &sdiff))
+    return INT_MAX;
+
+  return sdiff;
+}
+
+/* If DO_WRITE, bump the modification time of the file designated by NAP_FD.
+   Then fetch the new STAT information of NAP_FD.  */
+static void
+nap_get_stat (struct stat *st, int do_write)
+{
+  if (do_write)
+    {
+      ASSERT (write (nap_fd, "\n", 1) == 1);
+#if defined _WIN32 || defined __CYGWIN__
+      /* On Windows, the modification times are not changed until NAP_FD
+         is closed. See
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-writefile> */
+      close (nap_fd);
+      nap_fd = open (TEMPFILE, O_RDWR, 0600);
+      ASSERT (nap_fd != -1);
+      lseek (nap_fd, 0, SEEK_END);
+#endif
+    }
+  ASSERT (fstat (nap_fd, st) == 0);
+}
+
+/* Given a file whose descriptor is FD, see whether delaying by DELAY
+   nanoseconds causes a change in a file's mtime.
+   OLD_ST is the file's status, recently gotten.  */
+static bool
+nap_works (int delay, struct stat old_st)
+{
+  struct stat st;
+  struct timespec delay_spec;
+  delay_spec.tv_sec = delay / 1000000000;
+  delay_spec.tv_nsec = delay % 1000000000;
+  ASSERT (nanosleep (&delay_spec, 0) == 0);
+  nap_get_stat (&st, 1);
+
+  if (diff_timespec (get_stat_mtime (&st), get_stat_mtime (&old_st)))
+    return true;
+
+  return false;
+}
+
+static void
+clear_temp_file (void)
+{
+  if (0 <= nap_fd)
+    {
+      ASSERT (close (nap_fd) != -1);
+      ASSERT (unlink (TEMPFILE) != -1);
+    }
+}
+
+/* Sleep long enough to notice a timestamp difference on the file
+   system in the current directory.  Use an adaptive approach, trying
+   to find the smallest delay which works on the current file system
+   to make the timestamp difference appear.  Assert a maximum delay of
+   ~2 seconds, more precisely sum(2^n) from 0 to 30 = 2^31 - 1 = 2.1s.
+   Assumes that BASE is defined, and requires that the test module
+   depends on nanosleep.  */
+static void
+nap (void)
+{
+  struct stat old_st;
+  static int delay = 1;
+
+  if (-1 == nap_fd)
+    {
+      atexit (clear_temp_file);
+      ASSERT ((nap_fd = creat (TEMPFILE, 0600)) != -1);
+      nap_get_stat (&old_st, 0);
+    }
+  else
+    {
+      ASSERT (0 <= nap_fd);
+      nap_get_stat (&old_st, 1);
+    }
+
+  if (1 < delay)
+    delay = delay / 2;  /* Try half of the previous delay.  */
+  ASSERT (0 < delay);
+
+  for (;;)
+    {
+      if (nap_works (delay, old_st))
+        return;
+      if (delay <= (2147483647 - 1) / 2)
+        {
+          delay = delay * 2 + 1;
+          continue;
+        }
+      else
+        break;
+    }
+
+  /* Bummer: even the highest nap delay didn't work. */
+  ASSERT (0);
+}
+
+#endif /* GLTEST_NAP_H */
diff --git a/src/grep/gnulib-tests/netinet_in.in.h b/src/grep/gnulib-tests/netinet_in.in.h
new file mode 100644
index 0000000..21f3a64
--- /dev/null
+++ b/src/grep/gnulib-tests/netinet_in.in.h
@@ -0,0 +1,47 @@
+/* Substitute for <netinet/in.h>.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _@GUARD_PREFIX@_NETINET_IN_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if @HAVE_NETINET_IN_H@
+
+/* On many platforms, <netinet/in.h> assumes prior inclusion of
+   <sys/types.h>.  */
+# include <sys/types.h>
+
+/* The include_next requires a split double-inclusion guard.  */
+# @INCLUDE_NEXT@ @NEXT_NETINET_IN_H@
+
+#endif
+
+#ifndef _@GUARD_PREFIX@_NETINET_IN_H
+#define _@GUARD_PREFIX@_NETINET_IN_H
+
+#if !@HAVE_NETINET_IN_H@
+
+/* A platform that lacks <netinet/in.h>.  */
+
+# include <sys/socket.h>
+
+#endif
+
+#endif /* _@GUARD_PREFIX@_NETINET_IN_H */
+#endif /* _@GUARD_PREFIX@_NETINET_IN_H */
diff --git a/src/grep/gnulib-tests/offtostr.c b/src/grep/gnulib-tests/offtostr.c
new file mode 100644
index 0000000..b12ff2f
--- /dev/null
+++ b/src/grep/gnulib-tests/offtostr.c
@@ -0,0 +1,20 @@
+/* Convert 'off_t' integer to printable string.
+
+   Copyright (C) 2004-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#define anytostr offtostr
+#define inttype off_t
+#include "anytostr.c"
diff --git a/src/grep/gnulib-tests/perror.c b/src/grep/gnulib-tests/perror.c
new file mode 100644
index 0000000..d02b4f6
--- /dev/null
+++ b/src/grep/gnulib-tests/perror.c
@@ -0,0 +1,49 @@
+/* Print a message describing error code.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible and Simon Josefsson.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdio.h>
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "strerror-override.h"
+
+/* Use the system functions, not the gnulib overrides in this file.  */
+#undef fprintf
+
+void
+perror (const char *string)
+{
+  char stackbuf[STACKBUF_LEN];
+  int ret;
+
+  /* Our implementation guarantees that this will be a non-empty
+     string, even if it returns EINVAL; and stackbuf should be sized
+     large enough to avoid ERANGE.  */
+  ret = strerror_r (errno, stackbuf, sizeof stackbuf);
+  if (ret == ERANGE)
+    abort ();
+
+  if (string != NULL && *string != '\0')
+    fprintf (stderr, "%s: %s\n", string, stackbuf);
+  else
+    fprintf (stderr, "%s\n", stackbuf);
+}
diff --git a/src/grep/gnulib-tests/printf-args.c b/src/grep/gnulib-tests/printf-args.c
new file mode 100644
index 0000000..b822682
--- /dev/null
+++ b/src/grep/gnulib-tests/printf-args.c
@@ -0,0 +1,183 @@
+/* Decomposed printf argument list.
+   Copyright (C) 1999, 2002-2003, 2005-2007, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* This file can be parametrized with the following macros:
+     ENABLE_UNISTDIO    Set to 1 to enable the unistdio extensions.
+     PRINTF_FETCHARGS   Name of the function to be defined.
+     STATIC             Set to 'static' to declare the function static.  */
+
+#ifndef PRINTF_FETCHARGS
+# include <config.h>
+#endif
+
+/* Specification.  */
+#ifndef PRINTF_FETCHARGS
+# include "printf-args.h"
+#endif
+
+#ifdef STATIC
+STATIC
+#endif
+int
+PRINTF_FETCHARGS (va_list args, arguments *a)
+{
+  size_t i;
+  argument *ap;
+
+  for (i = 0, ap = &a->arg[0]; i < a->count; i++, ap++)
+    switch (ap->type)
+      {
+      case TYPE_SCHAR:
+        ap->a.a_schar = va_arg (args, /*signed char*/ int);
+        break;
+      case TYPE_UCHAR:
+        ap->a.a_uchar = va_arg (args, /*unsigned char*/ int);
+        break;
+      case TYPE_SHORT:
+        ap->a.a_short = va_arg (args, /*short*/ int);
+        break;
+      case TYPE_USHORT:
+        ap->a.a_ushort = va_arg (args, /*unsigned short*/ int);
+        break;
+      case TYPE_INT:
+        ap->a.a_int = va_arg (args, int);
+        break;
+      case TYPE_UINT:
+        ap->a.a_uint = va_arg (args, unsigned int);
+        break;
+      case TYPE_LONGINT:
+        ap->a.a_longint = va_arg (args, long int);
+        break;
+      case TYPE_ULONGINT:
+        ap->a.a_ulongint = va_arg (args, unsigned long int);
+        break;
+      case TYPE_LONGLONGINT:
+        ap->a.a_longlongint = va_arg (args, long long int);
+        break;
+      case TYPE_ULONGLONGINT:
+        ap->a.a_ulonglongint = va_arg (args, unsigned long long int);
+        break;
+      case TYPE_DOUBLE:
+        ap->a.a_double = va_arg (args, double);
+        break;
+      case TYPE_LONGDOUBLE:
+        ap->a.a_longdouble = va_arg (args, long double);
+        break;
+      case TYPE_CHAR:
+        ap->a.a_char = va_arg (args, int);
+        break;
+#if HAVE_WINT_T
+      case TYPE_WIDE_CHAR:
+        /* Although ISO C 99 7.24.1.(2) says that wint_t is "unchanged by
+           default argument promotions", this is not the case in mingw32,
+           where wint_t is 'unsigned short'.  */
+        ap->a.a_wide_char =
+          (sizeof (wint_t) < sizeof (int)
+           ? (wint_t) va_arg (args, int)
+           : va_arg (args, wint_t));
+        break;
+#endif
+      case TYPE_STRING:
+        ap->a.a_string = va_arg (args, const char *);
+        /* A null pointer is an invalid argument for "%s", but in practice
+           it occurs quite frequently in printf statements that produce
+           debug output.  Use a fallback in this case.  */
+        if (ap->a.a_string == NULL)
+          ap->a.a_string = "(NULL)";
+        break;
+#if HAVE_WCHAR_T
+      case TYPE_WIDE_STRING:
+        ap->a.a_wide_string = va_arg (args, const wchar_t *);
+        /* A null pointer is an invalid argument for "%ls", but in practice
+           it occurs quite frequently in printf statements that produce
+           debug output.  Use a fallback in this case.  */
+        if (ap->a.a_wide_string == NULL)
+          {
+            static const wchar_t wide_null_string[] =
+              {
+                (wchar_t)'(',
+                (wchar_t)'N', (wchar_t)'U', (wchar_t)'L', (wchar_t)'L',
+                (wchar_t)')',
+                (wchar_t)0
+              };
+            ap->a.a_wide_string = wide_null_string;
+          }
+        break;
+#endif
+      case TYPE_POINTER:
+        ap->a.a_pointer = va_arg (args, void *);
+        break;
+      case TYPE_COUNT_SCHAR_POINTER:
+        ap->a.a_count_schar_pointer = va_arg (args, signed char *);
+        break;
+      case TYPE_COUNT_SHORT_POINTER:
+        ap->a.a_count_short_pointer = va_arg (args, short *);
+        break;
+      case TYPE_COUNT_INT_POINTER:
+        ap->a.a_count_int_pointer = va_arg (args, int *);
+        break;
+      case TYPE_COUNT_LONGINT_POINTER:
+        ap->a.a_count_longint_pointer = va_arg (args, long int *);
+        break;
+      case TYPE_COUNT_LONGLONGINT_POINTER:
+        ap->a.a_count_longlongint_pointer = va_arg (args, long long int *);
+        break;
+#if ENABLE_UNISTDIO
+      /* The unistdio extensions.  */
+      case TYPE_U8_STRING:
+        ap->a.a_u8_string = va_arg (args, const uint8_t *);
+        /* A null pointer is an invalid argument for "%U", but in practice
+           it occurs quite frequently in printf statements that produce
+           debug output.  Use a fallback in this case.  */
+        if (ap->a.a_u8_string == NULL)
+          {
+            static const uint8_t u8_null_string[] =
+              { '(', 'N', 'U', 'L', 'L', ')', 0 };
+            ap->a.a_u8_string = u8_null_string;
+          }
+        break;
+      case TYPE_U16_STRING:
+        ap->a.a_u16_string = va_arg (args, const uint16_t *);
+        /* A null pointer is an invalid argument for "%lU", but in practice
+           it occurs quite frequently in printf statements that produce
+           debug output.  Use a fallback in this case.  */
+        if (ap->a.a_u16_string == NULL)
+          {
+            static const uint16_t u16_null_string[] =
+              { '(', 'N', 'U', 'L', 'L', ')', 0 };
+            ap->a.a_u16_string = u16_null_string;
+          }
+        break;
+      case TYPE_U32_STRING:
+        ap->a.a_u32_string = va_arg (args, const uint32_t *);
+        /* A null pointer is an invalid argument for "%llU", but in practice
+           it occurs quite frequently in printf statements that produce
+           debug output.  Use a fallback in this case.  */
+        if (ap->a.a_u32_string == NULL)
+          {
+            static const uint32_t u32_null_string[] =
+              { '(', 'N', 'U', 'L', 'L', ')', 0 };
+            ap->a.a_u32_string = u32_null_string;
+          }
+        break;
+#endif
+      default:
+        /* Unknown type.  */
+        return -1;
+      }
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/printf-args.h b/src/grep/gnulib-tests/printf-args.h
new file mode 100644
index 0000000..c8d9174
--- /dev/null
+++ b/src/grep/gnulib-tests/printf-args.h
@@ -0,0 +1,150 @@
+/* Decomposed printf argument list.
+   Copyright (C) 1999, 2002-2003, 2006-2007, 2011-2021 Free Software
+   Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _PRINTF_ARGS_H
+#define _PRINTF_ARGS_H
+
+/* This file can be parametrized with the following macros:
+     ENABLE_UNISTDIO    Set to 1 to enable the unistdio extensions.
+     PRINTF_FETCHARGS   Name of the function to be declared.
+     STATIC             Set to 'static' to declare the function static.  */
+
+/* Default parameters.  */
+#ifndef PRINTF_FETCHARGS
+# define PRINTF_FETCHARGS printf_fetchargs
+#endif
+
+/* Get size_t.  */
+#include <stddef.h>
+
+/* Get wchar_t.  */
+#if HAVE_WCHAR_T
+# include <stddef.h>
+#endif
+
+/* Get wint_t.  */
+#if HAVE_WINT_T
+# include <wchar.h>
+#endif
+
+/* Get va_list.  */
+#include <stdarg.h>
+
+
+/* Argument types */
+typedef enum
+{
+  TYPE_NONE,
+  TYPE_SCHAR,
+  TYPE_UCHAR,
+  TYPE_SHORT,
+  TYPE_USHORT,
+  TYPE_INT,
+  TYPE_UINT,
+  TYPE_LONGINT,
+  TYPE_ULONGINT,
+  TYPE_LONGLONGINT,
+  TYPE_ULONGLONGINT,
+  TYPE_DOUBLE,
+  TYPE_LONGDOUBLE,
+  TYPE_CHAR,
+#if HAVE_WINT_T
+  TYPE_WIDE_CHAR,
+#endif
+  TYPE_STRING,
+#if HAVE_WCHAR_T
+  TYPE_WIDE_STRING,
+#endif
+  TYPE_POINTER,
+  TYPE_COUNT_SCHAR_POINTER,
+  TYPE_COUNT_SHORT_POINTER,
+  TYPE_COUNT_INT_POINTER,
+  TYPE_COUNT_LONGINT_POINTER,
+  TYPE_COUNT_LONGLONGINT_POINTER
+#if ENABLE_UNISTDIO
+  /* The unistdio extensions.  */
+, TYPE_U8_STRING
+, TYPE_U16_STRING
+, TYPE_U32_STRING
+#endif
+} arg_type;
+
+/* Polymorphic argument */
+typedef struct
+{
+  arg_type type;
+  union
+  {
+    signed char                 a_schar;
+    unsigned char               a_uchar;
+    short                       a_short;
+    unsigned short              a_ushort;
+    int                         a_int;
+    unsigned int                a_uint;
+    long int                    a_longint;
+    unsigned long int           a_ulongint;
+    long long int               a_longlongint;
+    unsigned long long int      a_ulonglongint;
+    float                       a_float;
+    double                      a_double;
+    long double                 a_longdouble;
+    int                         a_char;
+#if HAVE_WINT_T
+    wint_t                      a_wide_char;
+#endif
+    const char*                 a_string;
+#if HAVE_WCHAR_T
+    const wchar_t*              a_wide_string;
+#endif
+    void*                       a_pointer;
+    signed char *               a_count_schar_pointer;
+    short *                     a_count_short_pointer;
+    int *                       a_count_int_pointer;
+    long int *                  a_count_longint_pointer;
+    long long int *             a_count_longlongint_pointer;
+#if ENABLE_UNISTDIO
+    /* The unistdio extensions.  */
+    const uint8_t *             a_u8_string;
+    const uint16_t *            a_u16_string;
+    const uint32_t *            a_u32_string;
+#endif
+  }
+  a;
+}
+argument;
+
+/* Number of directly allocated arguments (no malloc() needed).  */
+#define N_DIRECT_ALLOC_ARGUMENTS 7
+
+typedef struct
+{
+  size_t count;
+  argument *arg;
+  argument direct_alloc_arg[N_DIRECT_ALLOC_ARGUMENTS];
+}
+arguments;
+
+
+/* Fetch the arguments, putting them into a. */
+#ifdef STATIC
+STATIC
+#else
+extern
+#endif
+int PRINTF_FETCHARGS (va_list args, arguments *a);
+
+#endif /* _PRINTF_ARGS_H */
diff --git a/src/grep/gnulib-tests/printf-parse.c b/src/grep/gnulib-tests/printf-parse.c
new file mode 100644
index 0000000..f21cc17
--- /dev/null
+++ b/src/grep/gnulib-tests/printf-parse.c
@@ -0,0 +1,623 @@
+/* Formatted output to strings.
+   Copyright (C) 1999-2000, 2002-2003, 2006-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* This file can be parametrized with the following macros:
+     CHAR_T             The element type of the format string.
+     CHAR_T_ONLY_ASCII  Set to 1 to enable verification that all characters
+                        in the format string are ASCII.
+     DIRECTIVE          Structure denoting a format directive.
+                        Depends on CHAR_T.
+     DIRECTIVES         Structure denoting the set of format directives of a
+                        format string.  Depends on CHAR_T.
+     PRINTF_PARSE       Function that parses a format string.
+                        Depends on CHAR_T.
+     STATIC             Set to 'static' to declare the function static.
+     ENABLE_UNISTDIO    Set to 1 to enable the unistdio extensions.  */
+
+#ifndef PRINTF_PARSE
+# include <config.h>
+#endif
+
+/* Specification.  */
+#ifndef PRINTF_PARSE
+# include "printf-parse.h"
+#endif
+
+/* Default parameters.  */
+#ifndef PRINTF_PARSE
+# define PRINTF_PARSE printf_parse
+# define CHAR_T char
+# define DIRECTIVE char_directive
+# define DIRECTIVES char_directives
+#endif
+
+/* Get size_t, NULL.  */
+#include <stddef.h>
+
+/* Get intmax_t.  */
+#include <stdint.h>
+
+/* malloc(), realloc(), free().  */
+#include <stdlib.h>
+
+/* memcpy().  */
+#include <string.h>
+
+/* errno.  */
+#include <errno.h>
+
+/* Checked size_t computations.  */
+#include "xsize.h"
+
+#if CHAR_T_ONLY_ASCII
+/* c_isascii().  */
+# include "c-ctype.h"
+#endif
+
+#ifdef STATIC
+STATIC
+#endif
+int
+PRINTF_PARSE (const CHAR_T *format, DIRECTIVES *d, arguments *a)
+{
+  const CHAR_T *cp = format;    /* pointer into format */
+  size_t arg_posn = 0;          /* number of regular arguments consumed */
+  size_t d_allocated;           /* allocated elements of d->dir */
+  size_t a_allocated;           /* allocated elements of a->arg */
+  size_t max_width_length = 0;
+  size_t max_precision_length = 0;
+
+  d->count = 0;
+  d_allocated = N_DIRECT_ALLOC_DIRECTIVES;
+  d->dir = d->direct_alloc_dir;
+
+  a->count = 0;
+  a_allocated = N_DIRECT_ALLOC_ARGUMENTS;
+  a->arg = a->direct_alloc_arg;
+
+#define REGISTER_ARG(_index_,_type_) \
+  {                                                                     \
+    size_t n = (_index_);                                               \
+    if (n >= a_allocated)                                               \
+      {                                                                 \
+        size_t memory_size;                                             \
+        argument *memory;                                               \
+                                                                        \
+        a_allocated = xtimes (a_allocated, 2);                          \
+        if (a_allocated <= n)                                           \
+          a_allocated = xsum (n, 1);                                    \
+        memory_size = xtimes (a_allocated, sizeof (argument));          \
+        if (size_overflow_p (memory_size))                              \
+          /* Overflow, would lead to out of memory.  */                 \
+          goto out_of_memory;                                           \
+        memory = (argument *) (a->arg != a->direct_alloc_arg            \
+                               ? realloc (a->arg, memory_size)          \
+                               : malloc (memory_size));                 \
+        if (memory == NULL)                                             \
+          /* Out of memory.  */                                         \
+          goto out_of_memory;                                           \
+        if (a->arg == a->direct_alloc_arg)                              \
+          memcpy (memory, a->arg, a->count * sizeof (argument));        \
+        a->arg = memory;                                                \
+      }                                                                 \
+    while (a->count <= n)                                               \
+      a->arg[a->count++].type = TYPE_NONE;                              \
+    if (a->arg[n].type == TYPE_NONE)                                    \
+      a->arg[n].type = (_type_);                                        \
+    else if (a->arg[n].type != (_type_))                                \
+      /* Ambiguous type for positional argument.  */                    \
+      goto error;                                                       \
+  }
+
+  while (*cp != '\0')
+    {
+      CHAR_T c = *cp++;
+      if (c == '%')
+        {
+          size_t arg_index = ARG_NONE;
+          DIRECTIVE *dp = &d->dir[d->count]; /* pointer to next directive */
+
+          /* Initialize the next directive.  */
+          dp->dir_start = cp - 1;
+          dp->flags = 0;
+          dp->width_start = NULL;
+          dp->width_end = NULL;
+          dp->width_arg_index = ARG_NONE;
+          dp->precision_start = NULL;
+          dp->precision_end = NULL;
+          dp->precision_arg_index = ARG_NONE;
+          dp->arg_index = ARG_NONE;
+
+          /* Test for positional argument.  */
+          if (*cp >= '0' && *cp <= '9')
+            {
+              const CHAR_T *np;
+
+              for (np = cp; *np >= '0' && *np <= '9'; np++)
+                ;
+              if (*np == '$')
+                {
+                  size_t n = 0;
+
+                  for (np = cp; *np >= '0' && *np <= '9'; np++)
+                    n = xsum (xtimes (n, 10), *np - '0');
+                  if (n == 0)
+                    /* Positional argument 0.  */
+                    goto error;
+                  if (size_overflow_p (n))
+                    /* n too large, would lead to out of memory later.  */
+                    goto error;
+                  arg_index = n - 1;
+                  cp = np + 1;
+                }
+            }
+
+          /* Read the flags.  */
+          for (;;)
+            {
+              if (*cp == '\'')
+                {
+                  dp->flags |= FLAG_GROUP;
+                  cp++;
+                }
+              else if (*cp == '-')
+                {
+                  dp->flags |= FLAG_LEFT;
+                  cp++;
+                }
+              else if (*cp == '+')
+                {
+                  dp->flags |= FLAG_SHOWSIGN;
+                  cp++;
+                }
+              else if (*cp == ' ')
+                {
+                  dp->flags |= FLAG_SPACE;
+                  cp++;
+                }
+              else if (*cp == '#')
+                {
+                  dp->flags |= FLAG_ALT;
+                  cp++;
+                }
+              else if (*cp == '0')
+                {
+                  dp->flags |= FLAG_ZERO;
+                  cp++;
+                }
+#if __GLIBC__ >= 2 && !defined __UCLIBC__
+              else if (*cp == 'I')
+                {
+                  dp->flags |= FLAG_LOCALIZED;
+                  cp++;
+                }
+#endif
+              else
+                break;
+            }
+
+          /* Parse the field width.  */
+          if (*cp == '*')
+            {
+              dp->width_start = cp;
+              cp++;
+              dp->width_end = cp;
+              if (max_width_length < 1)
+                max_width_length = 1;
+
+              /* Test for positional argument.  */
+              if (*cp >= '0' && *cp <= '9')
+                {
+                  const CHAR_T *np;
+
+                  for (np = cp; *np >= '0' && *np <= '9'; np++)
+                    ;
+                  if (*np == '$')
+                    {
+                      size_t n = 0;
+
+                      for (np = cp; *np >= '0' && *np <= '9'; np++)
+                        n = xsum (xtimes (n, 10), *np - '0');
+                      if (n == 0)
+                        /* Positional argument 0.  */
+                        goto error;
+                      if (size_overflow_p (n))
+                        /* n too large, would lead to out of memory later.  */
+                        goto error;
+                      dp->width_arg_index = n - 1;
+                      cp = np + 1;
+                    }
+                }
+              if (dp->width_arg_index == ARG_NONE)
+                {
+                  dp->width_arg_index = arg_posn++;
+                  if (dp->width_arg_index == ARG_NONE)
+                    /* arg_posn wrapped around.  */
+                    goto error;
+                }
+              REGISTER_ARG (dp->width_arg_index, TYPE_INT);
+            }
+          else if (*cp >= '0' && *cp <= '9')
+            {
+              size_t width_length;
+
+              dp->width_start = cp;
+              for (; *cp >= '0' && *cp <= '9'; cp++)
+                ;
+              dp->width_end = cp;
+              width_length = dp->width_end - dp->width_start;
+              if (max_width_length < width_length)
+                max_width_length = width_length;
+            }
+
+          /* Parse the precision.  */
+          if (*cp == '.')
+            {
+              cp++;
+              if (*cp == '*')
+                {
+                  dp->precision_start = cp - 1;
+                  cp++;
+                  dp->precision_end = cp;
+                  if (max_precision_length < 2)
+                    max_precision_length = 2;
+
+                  /* Test for positional argument.  */
+                  if (*cp >= '0' && *cp <= '9')
+                    {
+                      const CHAR_T *np;
+
+                      for (np = cp; *np >= '0' && *np <= '9'; np++)
+                        ;
+                      if (*np == '$')
+                        {
+                          size_t n = 0;
+
+                          for (np = cp; *np >= '0' && *np <= '9'; np++)
+                            n = xsum (xtimes (n, 10), *np - '0');
+                          if (n == 0)
+                            /* Positional argument 0.  */
+                            goto error;
+                          if (size_overflow_p (n))
+                            /* n too large, would lead to out of memory
+                               later.  */
+                            goto error;
+                          dp->precision_arg_index = n - 1;
+                          cp = np + 1;
+                        }
+                    }
+                  if (dp->precision_arg_index == ARG_NONE)
+                    {
+                      dp->precision_arg_index = arg_posn++;
+                      if (dp->precision_arg_index == ARG_NONE)
+                        /* arg_posn wrapped around.  */
+                        goto error;
+                    }
+                  REGISTER_ARG (dp->precision_arg_index, TYPE_INT);
+                }
+              else
+                {
+                  size_t precision_length;
+
+                  dp->precision_start = cp - 1;
+                  for (; *cp >= '0' && *cp <= '9'; cp++)
+                    ;
+                  dp->precision_end = cp;
+                  precision_length = dp->precision_end - dp->precision_start;
+                  if (max_precision_length < precision_length)
+                    max_precision_length = precision_length;
+                }
+            }
+
+          {
+            arg_type type;
+
+            /* Parse argument type/size specifiers.  */
+            {
+              int flags = 0;
+
+              for (;;)
+                {
+                  if (*cp == 'h')
+                    {
+                      flags |= (1 << (flags & 1));
+                      cp++;
+                    }
+                  else if (*cp == 'L')
+                    {
+                      flags |= 4;
+                      cp++;
+                    }
+                  else if (*cp == 'l')
+                    {
+                      flags += 8;
+                      cp++;
+                    }
+                  else if (*cp == 'j')
+                    {
+                      if (sizeof (intmax_t) > sizeof (long))
+                        {
+                          /* intmax_t = long long */
+                          flags += 16;
+                        }
+                      else if (sizeof (intmax_t) > sizeof (int))
+                        {
+                          /* intmax_t = long */
+                          flags += 8;
+                        }
+                      cp++;
+                    }
+                  else if (*cp == 'z' || *cp == 'Z')
+                    {
+                      /* 'z' is standardized in ISO C 99, but glibc uses 'Z'
+                         because the warning facility in gcc-2.95.2 understands
+                         only 'Z' (see gcc-2.95.2/gcc/c-common.c:1784).  */
+                      if (sizeof (size_t) > sizeof (long))
+                        {
+                          /* size_t = long long */
+                          flags += 16;
+                        }
+                      else if (sizeof (size_t) > sizeof (int))
+                        {
+                          /* size_t = long */
+                          flags += 8;
+                        }
+                      cp++;
+                    }
+                  else if (*cp == 't')
+                    {
+                      if (sizeof (ptrdiff_t) > sizeof (long))
+                        {
+                          /* ptrdiff_t = long long */
+                          flags += 16;
+                        }
+                      else if (sizeof (ptrdiff_t) > sizeof (int))
+                        {
+                          /* ptrdiff_t = long */
+                          flags += 8;
+                        }
+                      cp++;
+                    }
+#if defined __APPLE__ && defined __MACH__
+                  /* On Mac OS X 10.3, PRIdMAX is defined as "qd".
+                     We cannot change it to "lld" because PRIdMAX must also
+                     be understood by the system's printf routines.  */
+                  else if (*cp == 'q')
+                    {
+                      if (64 / 8 > sizeof (long))
+                        {
+                          /* int64_t = long long */
+                          flags += 16;
+                        }
+                      else
+                        {
+                          /* int64_t = long */
+                          flags += 8;
+                        }
+                      cp++;
+                    }
+#endif
+#if defined _WIN32 && ! defined __CYGWIN__
+                  /* On native Windows, PRIdMAX is defined as "I64d".
+                     We cannot change it to "lld" because PRIdMAX must also
+                     be understood by the system's printf routines.  */
+                  else if (*cp == 'I' && cp[1] == '6' && cp[2] == '4')
+                    {
+                      if (64 / 8 > sizeof (long))
+                        {
+                          /* __int64 = long long */
+                          flags += 16;
+                        }
+                      else
+                        {
+                          /* __int64 = long */
+                          flags += 8;
+                        }
+                      cp += 3;
+                    }
+#endif
+                  else
+                    break;
+                }
+
+              /* Read the conversion character.  */
+              c = *cp++;
+              switch (c)
+                {
+                case 'd': case 'i':
+                  /* If 'long long' is larger than 'long':  */
+                  if (flags >= 16 || (flags & 4))
+                    type = TYPE_LONGLONGINT;
+                  else
+                  /* If 'long long' is the same as 'long', we parse "lld" into
+                     TYPE_LONGINT.  */
+                  if (flags >= 8)
+                    type = TYPE_LONGINT;
+                  else if (flags & 2)
+                    type = TYPE_SCHAR;
+                  else if (flags & 1)
+                    type = TYPE_SHORT;
+                  else
+                    type = TYPE_INT;
+                  break;
+                case 'o': case 'u': case 'x': case 'X':
+                  /* If 'unsigned long long' is larger than 'unsigned long':  */
+                  if (flags >= 16 || (flags & 4))
+                    type = TYPE_ULONGLONGINT;
+                  else
+                  /* If 'unsigned long long' is the same as 'unsigned long', we
+                     parse "llu" into TYPE_ULONGINT.  */
+                  if (flags >= 8)
+                    type = TYPE_ULONGINT;
+                  else if (flags & 2)
+                    type = TYPE_UCHAR;
+                  else if (flags & 1)
+                    type = TYPE_USHORT;
+                  else
+                    type = TYPE_UINT;
+                  break;
+                case 'f': case 'F': case 'e': case 'E': case 'g': case 'G':
+                case 'a': case 'A':
+                  if (flags >= 16 || (flags & 4))
+                    type = TYPE_LONGDOUBLE;
+                  else
+                    type = TYPE_DOUBLE;
+                  break;
+                case 'c':
+                  if (flags >= 8)
+#if HAVE_WINT_T
+                    type = TYPE_WIDE_CHAR;
+#else
+                    goto error;
+#endif
+                  else
+                    type = TYPE_CHAR;
+                  break;
+#if HAVE_WINT_T
+                case 'C':
+                  type = TYPE_WIDE_CHAR;
+                  c = 'c';
+                  break;
+#endif
+                case 's':
+                  if (flags >= 8)
+#if HAVE_WCHAR_T
+                    type = TYPE_WIDE_STRING;
+#else
+                    goto error;
+#endif
+                  else
+                    type = TYPE_STRING;
+                  break;
+#if HAVE_WCHAR_T
+                case 'S':
+                  type = TYPE_WIDE_STRING;
+                  c = 's';
+                  break;
+#endif
+                case 'p':
+                  type = TYPE_POINTER;
+                  break;
+                case 'n':
+                  /* If 'long long' is larger than 'long':  */
+                  if (flags >= 16 || (flags & 4))
+                    type = TYPE_COUNT_LONGLONGINT_POINTER;
+                  else
+                  /* If 'long long' is the same as 'long', we parse "lln" into
+                     TYPE_COUNT_LONGINT_POINTER.  */
+                  if (flags >= 8)
+                    type = TYPE_COUNT_LONGINT_POINTER;
+                  else if (flags & 2)
+                    type = TYPE_COUNT_SCHAR_POINTER;
+                  else if (flags & 1)
+                    type = TYPE_COUNT_SHORT_POINTER;
+                  else
+                    type = TYPE_COUNT_INT_POINTER;
+                  break;
+#if ENABLE_UNISTDIO
+                /* The unistdio extensions.  */
+                case 'U':
+                  if (flags >= 16)
+                    type = TYPE_U32_STRING;
+                  else if (flags >= 8)
+                    type = TYPE_U16_STRING;
+                  else
+                    type = TYPE_U8_STRING;
+                  break;
+#endif
+                case '%':
+                  type = TYPE_NONE;
+                  break;
+                default:
+                  /* Unknown conversion character.  */
+                  goto error;
+                }
+            }
+
+            if (type != TYPE_NONE)
+              {
+                dp->arg_index = arg_index;
+                if (dp->arg_index == ARG_NONE)
+                  {
+                    dp->arg_index = arg_posn++;
+                    if (dp->arg_index == ARG_NONE)
+                      /* arg_posn wrapped around.  */
+                      goto error;
+                  }
+                REGISTER_ARG (dp->arg_index, type);
+              }
+            dp->conversion = c;
+            dp->dir_end = cp;
+          }
+
+          d->count++;
+          if (d->count >= d_allocated)
+            {
+              size_t memory_size;
+              DIRECTIVE *memory;
+
+              d_allocated = xtimes (d_allocated, 2);
+              memory_size = xtimes (d_allocated, sizeof (DIRECTIVE));
+              if (size_overflow_p (memory_size))
+                /* Overflow, would lead to out of memory.  */
+                goto out_of_memory;
+              memory = (DIRECTIVE *) (d->dir != d->direct_alloc_dir
+                                      ? realloc (d->dir, memory_size)
+                                      : malloc (memory_size));
+              if (memory == NULL)
+                /* Out of memory.  */
+                goto out_of_memory;
+              if (d->dir == d->direct_alloc_dir)
+                memcpy (memory, d->dir, d->count * sizeof (DIRECTIVE));
+              d->dir = memory;
+            }
+        }
+#if CHAR_T_ONLY_ASCII
+      else if (!c_isascii (c))
+        {
+          /* Non-ASCII character.  Not supported.  */
+          goto error;
+        }
+#endif
+    }
+  d->dir[d->count].dir_start = cp;
+
+  d->max_width_length = max_width_length;
+  d->max_precision_length = max_precision_length;
+  return 0;
+
+error:
+  if (a->arg != a->direct_alloc_arg)
+    free (a->arg);
+  if (d->dir != d->direct_alloc_dir)
+    free (d->dir);
+  errno = EINVAL;
+  return -1;
+
+out_of_memory:
+  if (a->arg != a->direct_alloc_arg)
+    free (a->arg);
+  if (d->dir != d->direct_alloc_dir)
+    free (d->dir);
+  errno = ENOMEM;
+  return -1;
+}
+
+#undef PRINTF_PARSE
+#undef DIRECTIVES
+#undef DIRECTIVE
+#undef CHAR_T_ONLY_ASCII
+#undef CHAR_T
diff --git a/src/grep/gnulib-tests/printf-parse.h b/src/grep/gnulib-tests/printf-parse.h
new file mode 100644
index 0000000..77b7409
--- /dev/null
+++ b/src/grep/gnulib-tests/printf-parse.h
@@ -0,0 +1,193 @@
+/* Parse printf format string.
+   Copyright (C) 1999, 2002-2003, 2005, 2007, 2010-2021 Free Software
+   Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _PRINTF_PARSE_H
+#define _PRINTF_PARSE_H
+
+/* This file can be parametrized with the following macros:
+     ENABLE_UNISTDIO    Set to 1 to enable the unistdio extensions.
+     STATIC             Set to 'static' to declare the function static.  */
+
+#if HAVE_FEATURES_H
+# include <features.h> /* for __GLIBC__, __UCLIBC__ */
+#endif
+
+#include "printf-args.h"
+
+
+/* Flags */
+#define FLAG_GROUP       1      /* ' flag */
+#define FLAG_LEFT        2      /* - flag */
+#define FLAG_SHOWSIGN    4      /* + flag */
+#define FLAG_SPACE       8      /* space flag */
+#define FLAG_ALT        16      /* # flag */
+#define FLAG_ZERO       32
+#if __GLIBC__ >= 2 && !defined __UCLIBC__
+# define FLAG_LOCALIZED 64      /* I flag, uses localized digits */
+#endif
+
+/* arg_index value indicating that no argument is consumed.  */
+#define ARG_NONE        (~(size_t)0)
+
+/* xxx_directive: A parsed directive.
+   xxx_directives: A parsed format string.  */
+
+/* Number of directly allocated directives (no malloc() needed).  */
+#define N_DIRECT_ALLOC_DIRECTIVES 7
+
+/* A parsed directive.  */
+typedef struct
+{
+  const char* dir_start;
+  const char* dir_end;
+  int flags;
+  const char* width_start;
+  const char* width_end;
+  size_t width_arg_index;
+  const char* precision_start;
+  const char* precision_end;
+  size_t precision_arg_index;
+  char conversion; /* d i o u x X f F e E g G a A c s p n U % but not C S */
+  size_t arg_index;
+}
+char_directive;
+
+/* A parsed format string.  */
+typedef struct
+{
+  size_t count;
+  char_directive *dir;
+  size_t max_width_length;
+  size_t max_precision_length;
+  char_directive direct_alloc_dir[N_DIRECT_ALLOC_DIRECTIVES];
+}
+char_directives;
+
+#if ENABLE_UNISTDIO
+
+/* A parsed directive.  */
+typedef struct
+{
+  const uint8_t* dir_start;
+  const uint8_t* dir_end;
+  int flags;
+  const uint8_t* width_start;
+  const uint8_t* width_end;
+  size_t width_arg_index;
+  const uint8_t* precision_start;
+  const uint8_t* precision_end;
+  size_t precision_arg_index;
+  uint8_t conversion; /* d i o u x X f F e E g G a A c s p n U % but not C S */
+  size_t arg_index;
+}
+u8_directive;
+
+/* A parsed format string.  */
+typedef struct
+{
+  size_t count;
+  u8_directive *dir;
+  size_t max_width_length;
+  size_t max_precision_length;
+  u8_directive direct_alloc_dir[N_DIRECT_ALLOC_DIRECTIVES];
+}
+u8_directives;
+
+/* A parsed directive.  */
+typedef struct
+{
+  const uint16_t* dir_start;
+  const uint16_t* dir_end;
+  int flags;
+  const uint16_t* width_start;
+  const uint16_t* width_end;
+  size_t width_arg_index;
+  const uint16_t* precision_start;
+  const uint16_t* precision_end;
+  size_t precision_arg_index;
+  uint16_t conversion; /* d i o u x X f F e E g G a A c s p n U % but not C S */
+  size_t arg_index;
+}
+u16_directive;
+
+/* A parsed format string.  */
+typedef struct
+{
+  size_t count;
+  u16_directive *dir;
+  size_t max_width_length;
+  size_t max_precision_length;
+  u16_directive direct_alloc_dir[N_DIRECT_ALLOC_DIRECTIVES];
+}
+u16_directives;
+
+/* A parsed directive.  */
+typedef struct
+{
+  const uint32_t* dir_start;
+  const uint32_t* dir_end;
+  int flags;
+  const uint32_t* width_start;
+  const uint32_t* width_end;
+  size_t width_arg_index;
+  const uint32_t* precision_start;
+  const uint32_t* precision_end;
+  size_t precision_arg_index;
+  uint32_t conversion; /* d i o u x X f F e E g G a A c s p n U % but not C S */
+  size_t arg_index;
+}
+u32_directive;
+
+/* A parsed format string.  */
+typedef struct
+{
+  size_t count;
+  u32_directive *dir;
+  size_t max_width_length;
+  size_t max_precision_length;
+  u32_directive direct_alloc_dir[N_DIRECT_ALLOC_DIRECTIVES];
+}
+u32_directives;
+
+#endif
+
+
+/* Parses the format string.  Fills in the number N of directives, and fills
+   in directives[0], ..., directives[N-1], and sets directives[N].dir_start
+   to the end of the format string.  Also fills in the arg_type fields of the
+   arguments and the needed count of arguments.  */
+#if ENABLE_UNISTDIO
+extern int
+       ulc_printf_parse (const char *format, char_directives *d, arguments *a);
+extern int
+       u8_printf_parse (const uint8_t *format, u8_directives *d, arguments *a);
+extern int
+       u16_printf_parse (const uint16_t *format, u16_directives *d,
+                         arguments *a);
+extern int
+       u32_printf_parse (const uint32_t *format, u32_directives *d,
+                         arguments *a);
+#else
+# ifdef STATIC
+STATIC
+# else
+extern
+# endif
+int printf_parse (const char *format, char_directives *d, arguments *a);
+#endif
+
+#endif /* _PRINTF_PARSE_H */
diff --git a/src/grep/gnulib-tests/pthread-thread.c b/src/grep/gnulib-tests/pthread-thread.c
new file mode 100644
index 0000000..6e603bc
--- /dev/null
+++ b/src/grep/gnulib-tests/pthread-thread.c
@@ -0,0 +1,178 @@
+/* Creating and controlling POSIX threads.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert, 2010, and Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <pthread.h>
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+# include "windows-thread.h"
+#else
+# include <stdlib.h>
+#endif
+
+typedef void * (* pthread_main_function_t) (void *);
+
+#if ((defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS) || !HAVE_PTHREAD_H
+
+int
+pthread_attr_init (pthread_attr_t *attr)
+{
+  *attr = PTHREAD_CREATE_JOINABLE;
+  return 0;
+}
+
+int
+pthread_attr_getdetachstate (const pthread_attr_t *attr, int *detachstatep)
+{
+  *detachstatep = *attr & (PTHREAD_CREATE_JOINABLE | PTHREAD_CREATE_DETACHED);
+  return 0;
+}
+
+int
+pthread_attr_setdetachstate (pthread_attr_t *attr, int detachstate)
+{
+  if (!(detachstate == PTHREAD_CREATE_JOINABLE
+        || detachstate == PTHREAD_CREATE_DETACHED))
+    return EINVAL;
+  *attr ^= (*attr ^ detachstate)
+           & (PTHREAD_CREATE_JOINABLE | PTHREAD_CREATE_DETACHED);
+  return 0;
+}
+
+int
+pthread_attr_destroy (pthread_attr_t *attr _GL_UNUSED)
+{
+  return 0;
+}
+
+#endif
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+/* Use Windows threads.  */
+
+int
+pthread_create (pthread_t *threadp, const pthread_attr_t *attr,
+                pthread_main_function_t mainfunc, void *arg)
+{
+  unsigned int glwthread_attr =
+    (attr != NULL
+     && (*attr & (PTHREAD_CREATE_JOINABLE | PTHREAD_CREATE_DETACHED))
+        != PTHREAD_CREATE_JOINABLE
+     ? GLWTHREAD_ATTR_DETACHED
+     : 0);
+  return glwthread_thread_create (threadp, glwthread_attr, mainfunc, arg);
+}
+
+pthread_t
+pthread_self (void)
+{
+  return glwthread_thread_self ();
+}
+
+int
+pthread_equal (pthread_t thread1, pthread_t thread2)
+{
+  return thread1 == thread2;
+}
+
+int
+pthread_detach (pthread_t thread)
+{
+  return glwthread_thread_detach (thread);
+}
+
+int
+pthread_join (pthread_t thread, void **valuep)
+{
+  return glwthread_thread_join (thread, valuep);
+}
+
+void
+pthread_exit (void *value)
+{
+  glwthread_thread_exit (value);
+}
+
+#elif HAVE_PTHREAD_H
+/* Provide workarounds for POSIX threads.  */
+
+# if PTHREAD_CREATE_IS_INLINE
+int
+pthread_create (pthread_t *threadp, const pthread_attr_t *attr,
+                pthread_main_function_t mainfunc, void *arg)
+#  undef pthread_create
+{
+  return pthread_create (threadp, attr, mainfunc, arg);
+}
+
+int
+pthread_attr_init (pthread_attr_t *attr)
+#  undef pthread_attr_init
+{
+  return pthread_attr_init (attr);
+}
+
+# endif
+
+#else
+/* Provide a dummy implementation for single-threaded applications.  */
+
+int
+pthread_create (pthread_t *threadp, const pthread_attr_t *attr,
+                pthread_main_function_t mainfunc, void *arg)
+{
+  /* The maximum number of threads is reached.  Do not create a thread.  */
+  return EAGAIN;
+}
+
+pthread_t
+pthread_self (void)
+{
+  return 42;
+}
+
+int
+pthread_equal (pthread_t thread1, pthread_t thread2)
+{
+  return thread1 == thread2;
+}
+
+int
+pthread_detach (pthread_t thread)
+{
+  /* There are no joinable threads.  */
+  return EINVAL;
+}
+
+int
+pthread_join (pthread_t thread, void **valuep)
+{
+  /* There are no joinable threads.  */
+  return EINVAL;
+}
+
+void
+pthread_exit (void *value)
+{
+  /* There is just one thread, so the process exits.  */
+  exit (0);
+}
+
+#endif
diff --git a/src/grep/gnulib-tests/pthread.in.h b/src/grep/gnulib-tests/pthread.in.h
new file mode 100644
index 0000000..c4cd36c
--- /dev/null
+++ b/src/grep/gnulib-tests/pthread.in.h
@@ -0,0 +1,1963 @@
+/* Implement the most essential subset of POSIX 1003.1-2008 pthread.h.
+
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert, Glen Lenker, and Bruno Haible.  */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if defined _GL_ALREADY_INCLUDING_PTHREAD_H
+/* Special invocation convention:
+   On Android, we have a sequence of nested includes
+   <pthread.h> -> <time.h> -> <sys/time.h> -> <sys/select.h> ->
+   <signal.h> -> <pthread.h>.
+   In this situation, PTHREAD_COND_INITIALIZER is not yet defined,
+   therefore we should not attempt to define PTHREAD_MUTEX_NORMAL etc.  */
+
+#@INCLUDE_NEXT@ @NEXT_PTHREAD_H@
+
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_PTHREAD_H_
+
+#if @HAVE_PTHREAD_H@
+
+# define _GL_ALREADY_INCLUDING_PTHREAD_H
+
+/* The include_next requires a split double-inclusion guard.  */
+# @INCLUDE_NEXT@ @NEXT_PTHREAD_H@
+
+# undef _GL_ALREADY_INCLUDING_PTHREAD_H
+
+#endif
+
+#ifndef _@GUARD_PREFIX@_PTHREAD_H_
+#define _@GUARD_PREFIX@_PTHREAD_H_
+
+#define __need_system_stdlib_h
+#include <stdlib.h>
+#undef __need_system_stdlib_h
+
+
+/* The pthreads-win32 <pthread.h> defines a couple of broken macros.  */
+#undef asctime_r
+#undef ctime_r
+#undef gmtime_r
+#undef localtime_r
+#undef rand_r
+#undef strtok_r
+
+#include <errno.h>
+#include <sched.h>
+#include <sys/types.h>
+#include <time.h>
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _Noreturn is copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+/* =========== Thread types and macros =========== */
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+# if @GNULIB_PTHREAD_THREAD@
+#  include "windows-thread.h"
+#  if @HAVE_PTHREAD_T@
+#   define pthread_t rpl_pthread_t
+#   define pthread_attr_t rpl_pthread_attr_t
+#  endif
+#  if !GNULIB_defined_pthread_thread_types
+typedef glwthread_thread_t pthread_t;
+typedef unsigned int pthread_attr_t;
+#   define GNULIB_defined_pthread_thread_types 1
+#  endif
+# else
+#  if @HAVE_PTHREAD_T@
+#   define pthread_t rpl_pthread_t
+#   define pthread_attr_t rpl_pthread_attr_t
+#  endif
+#  if !GNULIB_defined_pthread_thread_types
+typedef int pthread_t;
+typedef unsigned int pthread_attr_t;
+#   define GNULIB_defined_pthread_thread_types 1
+#  endif
+# endif
+# undef PTHREAD_CREATE_JOINABLE
+# undef PTHREAD_CREATE_DETACHED
+# define PTHREAD_CREATE_JOINABLE 0
+# define PTHREAD_CREATE_DETACHED 1
+#else
+# if !@HAVE_PTHREAD_T@
+#  if !GNULIB_defined_pthread_thread_types
+typedef int pthread_t;
+typedef unsigned int pthread_attr_t;
+#   define GNULIB_defined_pthread_thread_types 1
+#  endif
+# endif
+# if !@HAVE_PTHREAD_CREATE_DETACHED@
+#  define PTHREAD_CREATE_JOINABLE 0
+#  define PTHREAD_CREATE_DETACHED 1
+# endif
+#endif
+
+/* =========== Once-only control (initialization) types and macros ========== */
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+# if @GNULIB_PTHREAD_ONCE@
+#  include "windows-once.h"
+#  if @HAVE_PTHREAD_T@
+#   define pthread_once_t rpl_pthread_once_t
+#  endif
+#  if !GNULIB_defined_pthread_once_types
+typedef glwthread_once_t pthread_once_t;
+#   define GNULIB_defined_pthread_once_types 1
+#  endif
+#  undef PTHREAD_ONCE_INIT
+#  define PTHREAD_ONCE_INIT GLWTHREAD_ONCE_INIT
+# else
+#  if @HAVE_PTHREAD_T@
+#   define pthread_once_t rpl_pthread_once_t
+#  endif
+#  if !GNULIB_defined_pthread_once_types
+typedef int pthread_once_t;
+#   define GNULIB_defined_pthread_once_types 1
+#  endif
+#  undef PTHREAD_ONCE_INIT
+#  define PTHREAD_ONCE_INIT { 0 }
+# endif
+#else
+# if !@HAVE_PTHREAD_T@
+#  if !GNULIB_defined_pthread_once_types
+typedef int pthread_once_t;
+#   define GNULIB_defined_pthread_once_types 1
+#  endif
+#  undef PTHREAD_ONCE_INIT
+#  define PTHREAD_ONCE_INIT { 0 }
+# endif
+#endif
+
+/* =========== Mutex types and macros =========== */
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+# if @GNULIB_PTHREAD_MUTEX@
+#  include "windows-timedmutex.h"
+#  include "windows-timedrecmutex.h"
+#  if @HAVE_PTHREAD_T@
+#   define pthread_mutex_t rpl_pthread_mutex_t
+#   define pthread_mutexattr_t rpl_pthread_mutexattr_t
+#  endif
+#  if !GNULIB_defined_pthread_mutex_types
+typedef struct
+        {
+          int type;
+          union
+            {
+              glwthread_timedmutex_t    u_timedmutex;
+              glwthread_timedrecmutex_t u_timedrecmutex;
+            }
+          u;
+        }
+        pthread_mutex_t;
+typedef unsigned int pthread_mutexattr_t;
+#   define GNULIB_defined_pthread_mutex_types 1
+#  endif
+#  undef PTHREAD_MUTEX_INITIALIZER
+#  define PTHREAD_MUTEX_INITIALIZER { 1, { GLWTHREAD_TIMEDMUTEX_INIT } }
+# else
+#  if @HAVE_PTHREAD_T@
+#   define pthread_mutex_t rpl_pthread_mutex_t
+#   define pthread_mutexattr_t rpl_pthread_mutexattr_t
+#  endif
+#  if !GNULIB_defined_pthread_mutex_types
+typedef int pthread_mutex_t;
+typedef unsigned int pthread_mutexattr_t;
+#   define GNULIB_defined_pthread_mutex_types 1
+#  endif
+#  undef PTHREAD_MUTEX_INITIALIZER
+#  define PTHREAD_MUTEX_INITIALIZER { 0 }
+# endif
+# undef PTHREAD_MUTEX_DEFAULT
+# undef PTHREAD_MUTEX_NORMAL
+# undef PTHREAD_MUTEX_ERRORCHECK
+# undef PTHREAD_MUTEX_RECURSIVE
+# define PTHREAD_MUTEX_DEFAULT PTHREAD_MUTEX_NORMAL
+# define PTHREAD_MUTEX_NORMAL 0
+# define PTHREAD_MUTEX_ERRORCHECK 1
+# define PTHREAD_MUTEX_RECURSIVE 2
+# undef PTHREAD_MUTEX_STALLED
+# undef PTHREAD_MUTEX_ROBUST
+# define PTHREAD_MUTEX_STALLED 0
+# define PTHREAD_MUTEX_ROBUST 1
+#else
+# if !@HAVE_PTHREAD_T@
+#  if !GNULIB_defined_pthread_mutex_types
+typedef int pthread_mutex_t;
+typedef unsigned int pthread_mutexattr_t;
+#   define GNULIB_defined_pthread_mutex_types 1
+#  endif
+#  undef PTHREAD_MUTEX_INITIALIZER
+#  define PTHREAD_MUTEX_INITIALIZER { 0 }
+# endif
+# if !@HAVE_PTHREAD_MUTEX_RECURSIVE@
+#  define PTHREAD_MUTEX_DEFAULT PTHREAD_MUTEX_NORMAL
+#  define PTHREAD_MUTEX_NORMAL 0
+#  define PTHREAD_MUTEX_ERRORCHECK 1
+#  define PTHREAD_MUTEX_RECURSIVE 2
+# endif
+# if !@HAVE_PTHREAD_MUTEX_ROBUST@
+#  define PTHREAD_MUTEX_STALLED 0
+#  define PTHREAD_MUTEX_ROBUST 1
+# endif
+#endif
+
+/* =========== Read-write lock types and macros =========== */
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+# if @GNULIB_PTHREAD_RWLOCK@
+#  include "windows-timedrwlock.h"
+#  if @HAVE_PTHREAD_T@
+#   define pthread_rwlock_t rpl_pthread_rwlock_t
+#   define pthread_rwlockattr_t rpl_pthread_rwlockattr_t
+#  endif
+#  if !GNULIB_defined_pthread_rwlock_types
+typedef glwthread_timedrwlock_t pthread_rwlock_t;
+typedef unsigned int pthread_rwlockattr_t;
+#   define GNULIB_defined_pthread_rwlock_types 1
+#  endif
+#  undef PTHREAD_RWLOCK_INITIALIZER
+#  define PTHREAD_RWLOCK_INITIALIZER GLWTHREAD_TIMEDRWLOCK_INIT
+# else
+#  if @HAVE_PTHREAD_T@
+#   define pthread_rwlock_t rpl_pthread_rwlock_t
+#   define pthread_rwlockattr_t rpl_pthread_rwlockattr_t
+#  endif
+#  if !GNULIB_defined_pthread_rwlock_types
+typedef int pthread_rwlock_t;
+typedef unsigned int pthread_rwlockattr_t;
+#   define GNULIB_defined_pthread_rwlock_types 1
+#  endif
+#  undef PTHREAD_RWLOCK_INITIALIZER
+#  define PTHREAD_RWLOCK_INITIALIZER { 0 }
+# endif
+#elif @GNULIB_PTHREAD_RWLOCK@ && @REPLACE_PTHREAD_RWLOCK_INIT@ /* i.e. PTHREAD_RWLOCK_UNIMPLEMENTED */
+# if @HAVE_PTHREAD_T@
+#  define pthread_rwlock_t rpl_pthread_rwlock_t
+#  define pthread_rwlockattr_t rpl_pthread_rwlockattr_t
+# endif
+# if !GNULIB_defined_pthread_rwlock_types
+typedef struct
+        {
+          pthread_mutex_t lock; /* protects the remaining fields */
+          pthread_cond_t waiting_readers; /* waiting readers */
+          pthread_cond_t waiting_writers; /* waiting writers */
+          unsigned int waiting_writers_count; /* number of waiting writers */
+          int runcount; /* number of readers running, or -1 when a writer runs */
+        }
+        pthread_rwlock_t;
+typedef unsigned int pthread_rwlockattr_t;
+#  define GNULIB_defined_pthread_rwlock_types 1
+# endif
+# undef PTHREAD_RWLOCK_INITIALIZER
+# define PTHREAD_RWLOCK_INITIALIZER \
+   { PTHREAD_MUTEX_INITIALIZER, PTHREAD_COND_INITIALIZER, PTHREAD_COND_INITIALIZER, 0, 0 }
+#else
+# if @HAVE_PTHREAD_T@
+#  if !defined PTHREAD_RWLOCK_INITIALIZER && defined PTHREAD_RWLOCK_INITIALIZER_NP /* z/OS */
+#   define PTHREAD_RWLOCK_INITIALIZER PTHREAD_RWLOCK_INITIALIZER_NP
+#  endif
+# else
+#  if !GNULIB_defined_pthread_rwlock_types
+typedef int pthread_rwlock_t;
+typedef unsigned int pthread_rwlockattr_t;
+#   define GNULIB_defined_pthread_rwlock_types 1
+#  endif
+#  undef PTHREAD_RWLOCK_INITIALIZER
+#  define PTHREAD_RWLOCK_INITIALIZER { 0 }
+# endif
+#endif
+
+/* =========== Condition variable types and macros =========== */
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+# if @GNULIB_PTHREAD_COND@
+#  include "windows-cond.h"
+#  if @HAVE_PTHREAD_T@
+#   define pthread_cond_t rpl_pthread_cond_t
+#   define pthread_condattr_t rpl_pthread_condattr_t
+#  endif
+#  if !GNULIB_defined_pthread_cond_types
+typedef glwthread_cond_t pthread_cond_t;
+typedef unsigned int pthread_condattr_t;
+#   define GNULIB_defined_pthread_cond_types 1
+#  endif
+#  undef PTHREAD_COND_INITIALIZER
+#  define PTHREAD_COND_INITIALIZER GLWTHREAD_COND_INIT
+# else
+#  if @HAVE_PTHREAD_T@
+#   define pthread_cond_t rpl_pthread_cond_t
+#   define pthread_condattr_t rpl_pthread_condattr_t
+#  endif
+#  if !GNULIB_defined_pthread_cond_types
+typedef int pthread_cond_t;
+typedef unsigned int pthread_condattr_t;
+#   define GNULIB_defined_pthread_cond_types 1
+#  endif
+#  undef PTHREAD_COND_INITIALIZER
+#  define PTHREAD_COND_INITIALIZER { 0 }
+# endif
+#else
+# if !@HAVE_PTHREAD_T@
+#  if !GNULIB_defined_pthread_cond_types
+typedef int pthread_cond_t;
+typedef unsigned int pthread_condattr_t;
+#   define GNULIB_defined_pthread_cond_types 1
+#  endif
+#  undef PTHREAD_COND_INITIALIZER
+#  define PTHREAD_COND_INITIALIZER { 0 }
+# endif
+#endif
+
+/* =========== Thread-specific storage types and macros =========== */
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+# if @GNULIB_PTHREAD_TSS@
+#  include "windows-tls.h"
+#  if @HAVE_PTHREAD_T@
+#   define pthread_key_t rpl_pthread_key_t
+#  endif
+#  if !GNULIB_defined_pthread_tss_types
+typedef glwthread_tls_key_t pthread_key_t;
+#   define GNULIB_defined_pthread_tss_types 1
+#  endif
+#  undef PTHREAD_DESTRUCTOR_ITERATIONS
+#  define PTHREAD_DESTRUCTOR_ITERATIONS GLWTHREAD_DESTRUCTOR_ITERATIONS
+# else
+#  if @HAVE_PTHREAD_T@
+#   define pthread_key_t rpl_pthread_key_t
+#  endif
+#  if !GNULIB_defined_pthread_tss_types
+typedef void ** pthread_key_t;
+#   define GNULIB_defined_pthread_tss_types 1
+#  endif
+#  undef PTHREAD_DESTRUCTOR_ITERATIONS
+#  define PTHREAD_DESTRUCTOR_ITERATIONS 0
+# endif
+#else
+# if !@HAVE_PTHREAD_T@
+#  if !GNULIB_defined_pthread_tss_types
+typedef void ** pthread_key_t;
+#   define GNULIB_defined_pthread_tss_types 1
+#  endif
+#  undef PTHREAD_DESTRUCTOR_ITERATIONS
+#  define PTHREAD_DESTRUCTOR_ITERATIONS 0
+# endif
+#endif
+
+/* =========== Spinlock types and macros =========== */
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+# if @GNULIB_PTHREAD_SPIN@
+#  include "windows-spin.h"
+#  if @HAVE_PTHREAD_T@
+#   define pthread_spinlock_t rpl_pthread_spinlock_t
+#  endif
+#  if !GNULIB_defined_pthread_spin_types
+typedef glwthread_spinlock_t pthread_spinlock_t;
+#   define GNULIB_defined_pthread_spin_types 1
+#  endif
+# else
+#  if @HAVE_PTHREAD_T@
+#   define pthread_spinlock_t rpl_pthread_spinlock_t
+#  endif
+#  if !GNULIB_defined_pthread_spin_types
+typedef pthread_mutex_t pthread_spinlock_t;
+#   define GNULIB_defined_pthread_spin_types 1
+#  endif
+# endif
+# undef PTHREAD_PROCESS_PRIVATE
+# undef PTHREAD_PROCESS_SHARED
+# define PTHREAD_PROCESS_PRIVATE 0
+# define PTHREAD_PROCESS_SHARED 1
+#else
+# if !@HAVE_PTHREAD_SPINLOCK_T@
+/* Approximate spinlocks with mutexes.  */
+#  if !GNULIB_defined_pthread_spin_types
+typedef pthread_mutex_t pthread_spinlock_t;
+#   define GNULIB_defined_pthread_spin_types 1
+#  endif
+# endif
+# if !@HAVE_PTHREAD_PROCESS_SHARED@
+#  define PTHREAD_PROCESS_PRIVATE 0
+#  define PTHREAD_PROCESS_SHARED 1
+# endif
+#endif
+
+/* =========== Other types and macros =========== */
+
+#if !@HAVE_PTHREAD_T@
+# if !GNULIB_defined_other_pthread_types
+typedef int pthread_barrier_t;
+typedef unsigned int pthread_barrierattr_t;
+#  define GNULIB_defined_other_pthread_types 1
+# endif
+#endif
+
+#if !defined PTHREAD_CANCELED
+
+# define PTHREAD_BARRIER_SERIAL_THREAD (-1)
+
+# define PTHREAD_CANCEL_DEFERRED 0
+# define PTHREAD_CANCEL_ASYNCHRONOUS 1
+
+# define PTHREAD_CANCEL_ENABLE 0
+# define PTHREAD_CANCEL_DISABLE 1
+
+# define PTHREAD_CANCELED ((void *) -1)
+
+# define PTHREAD_INHERIT_SCHED 0
+# define PTHREAD_EXPLICIT_SCHED 1
+
+# define PTHREAD_PRIO_NONE 0
+# define PTHREAD_PRIO_INHERIT 1
+# define PTHREAD_PRIO_PROTECT 2
+
+# define PTHREAD_SCOPE_SYSTEM 0
+# define PTHREAD_SCOPE_PROCESS 1
+
+#endif
+
+/* =========== Thread functions =========== */
+
+#if @GNULIB_PTHREAD_THREAD@
+/* The 'restrict' qualifier on ARG is nonsense, but POSIX specifies it this way.
+   Sigh.  */
+# if @REPLACE_PTHREAD_CREATE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_create
+#   define pthread_create rpl_pthread_create
+#  endif
+_GL_FUNCDECL_RPL (pthread_create, int,
+                  (pthread_t *restrict threadp,
+                   const pthread_attr_t *restrict attr,
+                   void * (*mainfunc) (void *), void *restrict arg)
+                  _GL_ARG_NONNULL ((1, 3)));
+_GL_CXXALIAS_RPL (pthread_create, int,
+                  (pthread_t *restrict threadp,
+                   const pthread_attr_t *restrict attr,
+                   void * (*mainfunc) (void *), void *restrict arg));
+# else
+#  if !@HAVE_PTHREAD_CREATE@
+_GL_FUNCDECL_SYS (pthread_create, int,
+                  (pthread_t *restrict threadp,
+                   const pthread_attr_t *restrict attr,
+                   void * (*mainfunc) (void *), void *restrict arg)
+                  _GL_ARG_NONNULL ((1, 3)));
+#  endif
+_GL_CXXALIAS_SYS_CAST (pthread_create, int,
+                       (pthread_t *restrict threadp,
+                        const pthread_attr_t *restrict attr,
+                        void * (*mainfunc) (void *), void *restrict arg));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_create);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_create
+# if HAVE_RAW_DECL_PTHREAD_CREATE
+_GL_WARN_ON_USE (pthread_create, "pthread_create is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_ATTR_INIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_attr_init
+#   define pthread_attr_init rpl_pthread_attr_init
+#  endif
+_GL_FUNCDECL_RPL (pthread_attr_init, int, (pthread_attr_t *attr)
+                                          _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_attr_init, int, (pthread_attr_t *attr));
+# else
+#  if !@HAVE_PTHREAD_ATTR_INIT@
+_GL_FUNCDECL_SYS (pthread_attr_init, int, (pthread_attr_t *attr)
+                                          _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_attr_init, int, (pthread_attr_t *attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_attr_init);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_attr_init
+# if HAVE_RAW_DECL_PTHREAD_ATTR_INIT
+_GL_WARN_ON_USE (pthread_attr_init, "pthread_attr_init is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_ATTR_GETDETACHSTATE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_attr_getdetachstate
+#   define pthread_attr_getdetachstate rpl_pthread_attr_getdetachstate
+#  endif
+_GL_FUNCDECL_RPL (pthread_attr_getdetachstate, int,
+                  (const pthread_attr_t *attr, int *detachstatep)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (pthread_attr_getdetachstate, int,
+                  (const pthread_attr_t *attr, int *detachstatep));
+# else
+#  if !@HAVE_PTHREAD_ATTR_GETDETACHSTATE@
+_GL_FUNCDECL_SYS (pthread_attr_getdetachstate, int,
+                  (const pthread_attr_t *attr, int *detachstatep)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_attr_getdetachstate, int,
+                  (const pthread_attr_t *attr, int *detachstatep));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_attr_getdetachstate);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_attr_getdetachstate
+# if HAVE_RAW_DECL_PTHREAD_ATTR_GETDETACHSTATE
+_GL_WARN_ON_USE (pthread_attr_getdetachstate, "pthread_attr_getdetachstate is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_ATTR_SETDETACHSTATE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_attr_setdetachstate
+#   define pthread_attr_setdetachstate rpl_pthread_attr_setdetachstate
+#  endif
+_GL_FUNCDECL_RPL (pthread_attr_setdetachstate, int,
+                  (pthread_attr_t *attr, int detachstate)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_attr_setdetachstate, int,
+                  (pthread_attr_t *attr, int detachstate));
+# else
+#  if !@HAVE_PTHREAD_ATTR_SETDETACHSTATE@
+_GL_FUNCDECL_SYS (pthread_attr_setdetachstate, int,
+                  (pthread_attr_t *attr, int detachstate)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_attr_setdetachstate, int,
+                  (pthread_attr_t *attr, int detachstate));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_attr_setdetachstate);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_attr_setdetachstate
+# if HAVE_RAW_DECL_PTHREAD_ATTR_SETDETACHSTATE
+_GL_WARN_ON_USE (pthread_attr_setdetachstate, "pthread_attr_setdetachstate is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_ATTR_DESTROY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_attr_destroy
+#   define pthread_attr_destroy rpl_pthread_attr_destroy
+#  endif
+_GL_FUNCDECL_RPL (pthread_attr_destroy, int, (pthread_attr_t *attr)
+                                             _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_attr_destroy, int, (pthread_attr_t *attr));
+# else
+#  if !@HAVE_PTHREAD_ATTR_DESTROY@
+_GL_FUNCDECL_SYS (pthread_attr_destroy, int, (pthread_attr_t *attr)
+                                             _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_attr_destroy, int, (pthread_attr_t *attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_attr_destroy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_attr_destroy
+# if HAVE_RAW_DECL_PTHREAD_ATTR_DESTROY
+_GL_WARN_ON_USE (pthread_attr_destroy, "pthread_attr_destroy is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_SELF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_self
+#   define pthread_self rpl_pthread_self
+#  endif
+_GL_FUNCDECL_RPL (pthread_self, pthread_t, (void) _GL_ATTRIBUTE_PURE);
+_GL_CXXALIAS_RPL (pthread_self, pthread_t, (void));
+# else
+#  if !@HAVE_PTHREAD_SELF@
+_GL_FUNCDECL_SYS (pthread_self, pthread_t, (void) _GL_ATTRIBUTE_PURE);
+#  endif
+_GL_CXXALIAS_SYS (pthread_self, pthread_t, (void));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_self);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_self
+# if HAVE_RAW_DECL_PTHREAD_SELF
+_GL_WARN_ON_USE (pthread_self, "pthread_self is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_EQUAL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_equal
+#   define pthread_equal rpl_pthread_equal
+#  endif
+_GL_FUNCDECL_RPL (pthread_equal, int, (pthread_t thread1, pthread_t thread2));
+_GL_CXXALIAS_RPL (pthread_equal, int, (pthread_t thread1, pthread_t thread2));
+# else
+#  if !@HAVE_PTHREAD_EQUAL@
+_GL_FUNCDECL_SYS (pthread_equal, int, (pthread_t thread1, pthread_t thread2));
+#  endif
+_GL_CXXALIAS_SYS (pthread_equal, int, (pthread_t thread1, pthread_t thread2));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_equal);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_equal
+# if HAVE_RAW_DECL_PTHREAD_EQUAL
+_GL_WARN_ON_USE (pthread_equal, "pthread_equal is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_DETACH@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_detach
+#   define pthread_detach rpl_pthread_detach
+#  endif
+_GL_FUNCDECL_RPL (pthread_detach, int, (pthread_t thread));
+_GL_CXXALIAS_RPL (pthread_detach, int, (pthread_t thread));
+# else
+#  if !@HAVE_PTHREAD_DETACH@
+_GL_FUNCDECL_SYS (pthread_detach, int, (pthread_t thread));
+#  endif
+_GL_CXXALIAS_SYS (pthread_detach, int, (pthread_t thread));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_detach);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_detach
+# if HAVE_RAW_DECL_PTHREAD_DETACH
+_GL_WARN_ON_USE (pthread_detach, "pthread_detach is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_JOIN@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_join
+#   define pthread_join rpl_pthread_join
+#  endif
+_GL_FUNCDECL_RPL (pthread_join, int, (pthread_t thread, void **valuep));
+_GL_CXXALIAS_RPL (pthread_join, int, (pthread_t thread, void **valuep));
+# else
+#  if !@HAVE_PTHREAD_JOIN@
+_GL_FUNCDECL_SYS (pthread_join, int, (pthread_t thread, void **valuep));
+#  endif
+_GL_CXXALIAS_SYS (pthread_join, int, (pthread_t thread, void **valuep));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_join);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_join
+# if HAVE_RAW_DECL_PTHREAD_JOIN
+_GL_WARN_ON_USE (pthread_join, "pthread_join is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_EXIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_exit
+#   define pthread_exit rpl_pthread_exit
+#  endif
+_GL_FUNCDECL_RPL (pthread_exit, _Noreturn void, (void *value));
+_GL_CXXALIAS_RPL (pthread_exit, void, (void *value));
+# else
+#  if !@HAVE_PTHREAD_EXIT@
+_GL_FUNCDECL_SYS (pthread_exit, _Noreturn void, (void *value));
+#  endif
+/* Need to cast because of AIX with xlclang++.  */
+_GL_CXXALIAS_SYS_CAST (pthread_exit, void, (void *value));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_exit);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_exit
+# if HAVE_RAW_DECL_PTHREAD_EXIT
+_GL_WARN_ON_USE (pthread_exit, "pthread_exit is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+/* =========== Once-only control (initialization) functions =========== */
+
+#if @GNULIB_PTHREAD_ONCE@
+# if @REPLACE_PTHREAD_ONCE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_once
+#   define pthread_once rpl_pthread_once
+#  endif
+_GL_FUNCDECL_RPL (pthread_once, int,
+                  (pthread_once_t *once_control, void (*initfunction) (void))
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (pthread_once, int,
+                  (pthread_once_t *once_control, void (*initfunction) (void)));
+# else
+#  if !@HAVE_PTHREAD_ONCE@
+_GL_FUNCDECL_SYS (pthread_once, int,
+                  (pthread_once_t *once_control, void (*initfunction) (void))
+                   _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS_CAST (pthread_once, int,
+                       (pthread_once_t *once_control,
+                        void (*initfunction) (void)));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_once);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_once
+# if HAVE_RAW_DECL_PTHREAD_ONCE
+_GL_WARN_ON_USE (pthread_once, "pthread_once is not portable - "
+                 "use gnulib module pthread-once for portability");
+# endif
+#endif
+
+/* =========== Mutex functions =========== */
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEX_INIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutex_init
+#   define pthread_mutex_init rpl_pthread_mutex_init
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutex_init, int,
+                  (pthread_mutex_t *restrict mutex,
+                   const pthread_mutexattr_t *restrict attr)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutex_init, int,
+                  (pthread_mutex_t *restrict mutex,
+                   const pthread_mutexattr_t *restrict attr));
+# else
+#  if !@HAVE_PTHREAD_MUTEX_INIT@
+_GL_FUNCDECL_SYS (pthread_mutex_init, int,
+                  (pthread_mutex_t *restrict mutex,
+                   const pthread_mutexattr_t *restrict attr)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutex_init, int,
+                  (pthread_mutex_t *restrict mutex,
+                   const pthread_mutexattr_t *restrict attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutex_init);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutex_init
+# if HAVE_RAW_DECL_PTHREAD_MUTEX_INIT
+_GL_WARN_ON_USE (pthread_mutex_init, "pthread_mutex_init is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEXATTR_INIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutexattr_init
+#   define pthread_mutexattr_init rpl_pthread_mutexattr_init
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutexattr_init, int, (pthread_mutexattr_t *attr)
+                                               _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutexattr_init, int, (pthread_mutexattr_t *attr));
+# else
+#  if !@HAVE_PTHREAD_MUTEXATTR_INIT@
+_GL_FUNCDECL_SYS (pthread_mutexattr_init, int, (pthread_mutexattr_t *attr)
+                                               _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutexattr_init, int, (pthread_mutexattr_t *attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutexattr_init);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutexattr_init
+# if HAVE_RAW_DECL_PTHREAD_MUTEXATTR_INIT
+_GL_WARN_ON_USE (pthread_mutexattr_init, "pthread_mutexattr_init is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEXATTR_GETTYPE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutexattr_gettype
+#   define pthread_mutexattr_gettype rpl_pthread_mutexattr_gettype
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutexattr_gettype, int,
+                  (const pthread_mutexattr_t *restrict attr,
+                   int *restrict typep)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (pthread_mutexattr_gettype, int,
+                  (const pthread_mutexattr_t *restrict attr,
+                   int *restrict typep));
+# else
+#  if !@HAVE_PTHREAD_MUTEXATTR_GETTYPE@
+_GL_FUNCDECL_SYS (pthread_mutexattr_gettype, int,
+                  (const pthread_mutexattr_t *restrict attr,
+                   int *restrict typep)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+/* Need to cast, because on FreeBSD the first parameter is
+                        pthread_mutexattr_t *attr.  */
+_GL_CXXALIAS_SYS_CAST (pthread_mutexattr_gettype, int,
+                       (const pthread_mutexattr_t *restrict attr,
+                        int *restrict typep));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutexattr_gettype);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutexattr_gettype
+# if HAVE_RAW_DECL_PTHREAD_MUTEXATTR_GETTYPE
+_GL_WARN_ON_USE (pthread_mutexattr_gettype, "pthread_mutexattr_gettype is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEXATTR_SETTYPE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutexattr_settype
+#   define pthread_mutexattr_settype rpl_pthread_mutexattr_settype
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutexattr_settype, int,
+                  (pthread_mutexattr_t *attr, int type) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutexattr_settype, int,
+                  (pthread_mutexattr_t *attr, int type));
+# else
+#  if !@HAVE_PTHREAD_MUTEXATTR_SETTYPE@
+_GL_FUNCDECL_SYS (pthread_mutexattr_settype, int,
+                  (pthread_mutexattr_t *attr, int type) _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutexattr_settype, int,
+                  (pthread_mutexattr_t *attr, int type));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutexattr_settype);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutexattr_settype
+# if HAVE_RAW_DECL_PTHREAD_MUTEXATTR_SETTYPE
+_GL_WARN_ON_USE (pthread_mutexattr_settype, "pthread_mutexattr_settype is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEXATTR_GETROBUST@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutexattr_getrobust
+#   define pthread_mutexattr_getrobust rpl_pthread_mutexattr_getrobust
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutexattr_getrobust, int,
+                  (const pthread_mutexattr_t *restrict attr,
+                   int *restrict robustp)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (pthread_mutexattr_getrobust, int,
+                  (const pthread_mutexattr_t *restrict attr,
+                   int *restrict robustp));
+# else
+#  if !@HAVE_PTHREAD_MUTEXATTR_GETROBUST@
+_GL_FUNCDECL_SYS (pthread_mutexattr_getrobust, int,
+                  (const pthread_mutexattr_t *restrict attr,
+                   int *restrict robustp)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+/* Need to cast, because on FreeBSD the first parameter is
+                        pthread_mutexattr_t *attr.  */
+_GL_CXXALIAS_SYS_CAST (pthread_mutexattr_getrobust, int,
+                       (const pthread_mutexattr_t *restrict attr,
+                        int *restrict robustp));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutexattr_getrobust);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutexattr_getrobust
+# if HAVE_RAW_DECL_PTHREAD_MUTEXATTR_GETROBUST
+_GL_WARN_ON_USE (pthread_mutexattr_getrobust, "pthread_mutexattr_getrobust is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEXATTR_SETROBUST@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutexattr_setrobust
+#   define pthread_mutexattr_setrobust rpl_pthread_mutexattr_setrobust
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutexattr_setrobust, int,
+                  (pthread_mutexattr_t *attr, int robust)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutexattr_setrobust, int,
+                  (pthread_mutexattr_t *attr, int robust));
+# else
+#  if !@HAVE_PTHREAD_MUTEXATTR_SETROBUST@
+_GL_FUNCDECL_SYS (pthread_mutexattr_setrobust, int,
+                  (pthread_mutexattr_t *attr, int robust)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutexattr_setrobust, int,
+                  (pthread_mutexattr_t *attr, int robust));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutexattr_setrobust);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutexattr_setrobust
+# if HAVE_RAW_DECL_PTHREAD_MUTEXATTR_SETROBUST
+_GL_WARN_ON_USE (pthread_mutexattr_setrobust, "pthread_mutexattr_setrobust is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEXATTR_DESTROY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutexattr_destroy
+#   define pthread_mutexattr_destroy rpl_pthread_mutexattr_destroy
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutexattr_destroy, int, (pthread_mutexattr_t *attr)
+                                                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutexattr_destroy, int, (pthread_mutexattr_t *attr));
+# else
+#  if !@HAVE_PTHREAD_MUTEXATTR_DESTROY@
+_GL_FUNCDECL_SYS (pthread_mutexattr_destroy, int, (pthread_mutexattr_t *attr)
+                                                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutexattr_destroy, int, (pthread_mutexattr_t *attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutexattr_destroy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutexattr_destroy
+# if HAVE_RAW_DECL_PTHREAD_MUTEXATTR_DESTROY
+_GL_WARN_ON_USE (pthread_mutexattr_destroy, "pthread_mutexattr_destroy is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEX_LOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutex_lock
+#   define pthread_mutex_lock rpl_pthread_mutex_lock
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutex_lock, int, (pthread_mutex_t *mutex)
+                                           _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutex_lock, int, (pthread_mutex_t *mutex));
+# else
+#  if !@HAVE_PTHREAD_MUTEX_LOCK@
+_GL_FUNCDECL_SYS (pthread_mutex_lock, int, (pthread_mutex_t *mutex)
+                                           _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutex_lock, int, (pthread_mutex_t *mutex));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutex_lock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutex_lock
+# if HAVE_RAW_DECL_PTHREAD_MUTEX_LOCK
+_GL_WARN_ON_USE (pthread_mutex_lock, "pthread_mutex_lock is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEX_TRYLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutex_trylock
+#   define pthread_mutex_trylock rpl_pthread_mutex_trylock
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutex_trylock, int, (pthread_mutex_t *mutex)
+                                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutex_trylock, int, (pthread_mutex_t *mutex));
+# else
+#  if !@HAVE_PTHREAD_MUTEX_TRYLOCK@
+_GL_FUNCDECL_SYS (pthread_mutex_trylock, int, (pthread_mutex_t *mutex)
+                                              _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutex_trylock, int, (pthread_mutex_t *mutex));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutex_trylock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutex_trylock
+# if HAVE_RAW_DECL_PTHREAD_MUTEX_TRYLOCK
+_GL_WARN_ON_USE (pthread_mutex_trylock, "pthread_mutex_trylock is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX_TIMEDLOCK@
+# if @REPLACE_PTHREAD_MUTEX_TIMEDLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutex_timedlock
+#   define pthread_mutex_timedlock rpl_pthread_mutex_timedlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutex_timedlock, int,
+                  (pthread_mutex_t *restrict mutex,
+                   const struct timespec *restrict abstime)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (pthread_mutex_timedlock, int,
+                  (pthread_mutex_t *restrict mutex,
+                   const struct timespec *restrict abstime));
+# else
+#  if !@HAVE_PTHREAD_MUTEX_TIMEDLOCK@
+_GL_FUNCDECL_SYS (pthread_mutex_timedlock, int,
+                  (pthread_mutex_t *restrict mutex,
+                   const struct timespec *restrict abstime)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutex_timedlock, int,
+                  (pthread_mutex_t *restrict mutex,
+                   const struct timespec *restrict abstime));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutex_timedlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutex_timedlock
+# if HAVE_RAW_DECL_PTHREAD_MUTEX_TIMEDLOCK
+_GL_WARN_ON_USE (pthread_mutex_timedlock, "pthread_mutex_timedlock is not portable - "
+                 "use gnulib module pthread_mutex_timedlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEX_UNLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutex_unlock
+#   define pthread_mutex_unlock rpl_pthread_mutex_unlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutex_unlock, int, (pthread_mutex_t *mutex)
+                                             _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutex_unlock, int, (pthread_mutex_t *mutex));
+# else
+#  if !@HAVE_PTHREAD_MUTEX_UNLOCK@
+_GL_FUNCDECL_SYS (pthread_mutex_unlock, int, (pthread_mutex_t *mutex)
+                                             _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutex_unlock, int, (pthread_mutex_t *mutex));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutex_unlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutex_unlock
+# if HAVE_RAW_DECL_PTHREAD_MUTEX_UNLOCK
+_GL_WARN_ON_USE (pthread_mutex_unlock, "pthread_mutex_unlock is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEX_DESTROY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutex_destroy
+#   define pthread_mutex_destroy rpl_pthread_mutex_destroy
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutex_destroy, int, (pthread_mutex_t *mutex)
+                                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutex_destroy, int, (pthread_mutex_t *mutex));
+# else
+#  if !@HAVE_PTHREAD_MUTEX_DESTROY@
+_GL_FUNCDECL_SYS (pthread_mutex_destroy, int, (pthread_mutex_t *mutex)
+                                              _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutex_destroy, int, (pthread_mutex_t *mutex));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutex_destroy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutex_destroy
+# if HAVE_RAW_DECL_PTHREAD_MUTEX_DESTROY
+_GL_WARN_ON_USE (pthread_mutex_destroy, "pthread_mutex_destroy is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+/* =========== Read-write lock functions =========== */
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_INIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_init
+#   define pthread_rwlock_init rpl_pthread_rwlock_init
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_init, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const pthread_rwlockattr_t *restrict attr)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlock_init, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const pthread_rwlockattr_t *restrict attr));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_INIT@
+_GL_FUNCDECL_SYS (pthread_rwlock_init, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const pthread_rwlockattr_t *restrict attr)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_init, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const pthread_rwlockattr_t *restrict attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_init);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_init
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_INIT
+_GL_WARN_ON_USE (pthread_rwlock_init, "pthread_rwlock_init is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCKATTR_INIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlockattr_init
+#   define pthread_rwlockattr_init rpl_pthread_rwlockattr_init
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlockattr_init, int, (pthread_rwlockattr_t *attr)
+                                                _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlockattr_init, int, (pthread_rwlockattr_t *attr));
+# else
+#  if !@HAVE_PTHREAD_RWLOCKATTR_INIT@
+_GL_FUNCDECL_SYS (pthread_rwlockattr_init, int, (pthread_rwlockattr_t *attr)
+                                                _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlockattr_init, int, (pthread_rwlockattr_t *attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlockattr_init);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlockattr_init
+# if HAVE_RAW_DECL_PTHREAD_RWLOCKATTR_INIT
+_GL_WARN_ON_USE (pthread_rwlockattr_init, "pthread_rwlockattr_init is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCKATTR_DESTROY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlockattr_destroy
+#   define pthread_rwlockattr_destroy rpl_pthread_rwlockattr_destroy
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlockattr_destroy, int,
+                  (pthread_rwlockattr_t *attr) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlockattr_destroy, int,
+                  (pthread_rwlockattr_t *attr));
+# else
+#  if !@HAVE_PTHREAD_RWLOCKATTR_DESTROY@
+_GL_FUNCDECL_SYS (pthread_rwlockattr_destroy, int,
+                  (pthread_rwlockattr_t *attr) _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlockattr_destroy, int,
+                  (pthread_rwlockattr_t *attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlockattr_destroy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlockattr_destroy
+# if HAVE_RAW_DECL_PTHREAD_RWLOCKATTR_DESTROY
+_GL_WARN_ON_USE (pthread_rwlockattr_destroy, "pthread_rwlockattr_destroy is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_RDLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_rdlock
+#   define pthread_rwlock_rdlock rpl_pthread_rwlock_rdlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_rdlock, int, (pthread_rwlock_t *lock)
+                                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlock_rdlock, int, (pthread_rwlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_RDLOCK@
+_GL_FUNCDECL_SYS (pthread_rwlock_rdlock, int, (pthread_rwlock_t *lock)
+                                              _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_rdlock, int, (pthread_rwlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_rdlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_rdlock
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_RDLOCK
+_GL_WARN_ON_USE (pthread_rwlock_rdlock, "pthread_rwlock_rdlock is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_WRLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_wrlock
+#   define pthread_rwlock_wrlock rpl_pthread_rwlock_wrlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_wrlock, int, (pthread_rwlock_t *lock)
+                                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlock_wrlock, int, (pthread_rwlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_WRLOCK@
+_GL_FUNCDECL_SYS (pthread_rwlock_wrlock, int, (pthread_rwlock_t *lock)
+                                              _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_wrlock, int, (pthread_rwlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_wrlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_wrlock
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_WRLOCK
+_GL_WARN_ON_USE (pthread_rwlock_wrlock, "pthread_rwlock_wrlock is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_TRYRDLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_tryrdlock
+#   define pthread_rwlock_tryrdlock rpl_pthread_rwlock_tryrdlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_tryrdlock, int, (pthread_rwlock_t *lock)
+                                                 _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlock_tryrdlock, int, (pthread_rwlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_TRYRDLOCK@
+_GL_FUNCDECL_SYS (pthread_rwlock_tryrdlock, int, (pthread_rwlock_t *lock)
+                                                 _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_tryrdlock, int, (pthread_rwlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_tryrdlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_tryrdlock
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_TRYRDLOCK
+_GL_WARN_ON_USE (pthread_rwlock_tryrdlock, "pthread_rwlock_tryrdlock is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_TRYWRLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_trywrlock
+#   define pthread_rwlock_trywrlock rpl_pthread_rwlock_trywrlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_trywrlock, int, (pthread_rwlock_t *lock)
+                                                 _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlock_trywrlock, int, (pthread_rwlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_TRYWRLOCK@
+_GL_FUNCDECL_SYS (pthread_rwlock_trywrlock, int, (pthread_rwlock_t *lock)
+                                                 _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_trywrlock, int, (pthread_rwlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_trywrlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_trywrlock
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_TRYWRLOCK
+_GL_WARN_ON_USE (pthread_rwlock_trywrlock, "pthread_rwlock_trywrlock is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_timedrdlock
+#   define pthread_rwlock_timedrdlock rpl_pthread_rwlock_timedrdlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_timedrdlock, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const struct timespec *restrict abstime)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (pthread_rwlock_timedrdlock, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const struct timespec *restrict abstime));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK@
+_GL_FUNCDECL_SYS (pthread_rwlock_timedrdlock, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const struct timespec *restrict abstime)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_timedrdlock, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const struct timespec *restrict abstime));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_timedrdlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_timedrdlock
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_TIMEDRDLOCK
+_GL_WARN_ON_USE (pthread_rwlock_timedrdlock, "pthread_rwlock_timedrdlock is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_timedwrlock
+#   define pthread_rwlock_timedwrlock rpl_pthread_rwlock_timedwrlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_timedwrlock, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const struct timespec *restrict abstime)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (pthread_rwlock_timedwrlock, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const struct timespec *restrict abstime));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK@
+_GL_FUNCDECL_SYS (pthread_rwlock_timedwrlock, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const struct timespec *restrict abstime)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_timedwrlock, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const struct timespec *restrict abstime));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_timedwrlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_timedwrlock
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_TIMEDWRLOCK
+_GL_WARN_ON_USE (pthread_rwlock_timedwrlock, "pthread_rwlock_timedwrlock is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_UNLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_unlock
+#   define pthread_rwlock_unlock rpl_pthread_rwlock_unlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_unlock, int, (pthread_rwlock_t *lock)
+                                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlock_unlock, int, (pthread_rwlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_UNLOCK@
+_GL_FUNCDECL_SYS (pthread_rwlock_unlock, int, (pthread_rwlock_t *lock)
+                                              _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_unlock, int, (pthread_rwlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_unlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_unlock
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_UNLOCK
+_GL_WARN_ON_USE (pthread_rwlock_unlock, "pthread_rwlock_unlock is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_DESTROY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_destroy
+#   define pthread_rwlock_destroy rpl_pthread_rwlock_destroy
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_destroy, int, (pthread_rwlock_t *lock)
+                                               _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlock_destroy, int, (pthread_rwlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_DESTROY@
+_GL_FUNCDECL_SYS (pthread_rwlock_destroy, int, (pthread_rwlock_t *lock)
+                                               _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_destroy, int, (pthread_rwlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_destroy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_destroy
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_DESTROY
+_GL_WARN_ON_USE (pthread_rwlock_destroy, "pthread_rwlock_destroy is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+/* =========== Condition variable functions =========== */
+
+#if @GNULIB_PTHREAD_COND@
+# if @REPLACE_PTHREAD_COND_INIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_cond_init
+#   define pthread_cond_init rpl_pthread_cond_init
+#  endif
+_GL_FUNCDECL_RPL (pthread_cond_init, int,
+                  (pthread_cond_t *restrict cond,
+                   const pthread_condattr_t *restrict attr)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_cond_init, int,
+                  (pthread_cond_t *restrict cond,
+                   const pthread_condattr_t *restrict attr));
+# else
+#  if !@HAVE_PTHREAD_COND_INIT@
+_GL_FUNCDECL_SYS (pthread_cond_init, int,
+                  (pthread_cond_t *restrict cond,
+                   const pthread_condattr_t *restrict attr)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_cond_init, int,
+                  (pthread_cond_t *restrict cond,
+                   const pthread_condattr_t *restrict attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_cond_init);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_cond_init
+# if HAVE_RAW_DECL_PTHREAD_COND_INIT
+_GL_WARN_ON_USE (pthread_cond_init, "pthread_cond_init is not portable - "
+                 "use gnulib module pthread-cond for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_COND@
+# if @REPLACE_PTHREAD_CONDATTR_INIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_condattr_init
+#   define pthread_condattr_init rpl_pthread_condattr_init
+#  endif
+_GL_FUNCDECL_RPL (pthread_condattr_init, int, (pthread_condattr_t *attr)
+                                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_condattr_init, int, (pthread_condattr_t *attr));
+# else
+#  if !@HAVE_PTHREAD_CONDATTR_INIT@
+_GL_FUNCDECL_SYS (pthread_condattr_init, int, (pthread_condattr_t *attr)
+                                              _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_condattr_init, int, (pthread_condattr_t *attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_condattr_init);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_condattr_init
+# if HAVE_RAW_DECL_PTHREAD_CONDATTR_INIT
+_GL_WARN_ON_USE (pthread_condattr_init, "pthread_condattr_init is not portable - "
+                 "use gnulib module pthread-cond for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_COND@
+# if @REPLACE_PTHREAD_CONDATTR_DESTROY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_condattr_destroy
+#   define pthread_condattr_destroy rpl_pthread_condattr_destroy
+#  endif
+_GL_FUNCDECL_RPL (pthread_condattr_destroy, int, (pthread_condattr_t *attr)
+                                                 _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_condattr_destroy, int, (pthread_condattr_t *attr));
+# else
+#  if !@HAVE_PTHREAD_CONDATTR_DESTROY@
+_GL_FUNCDECL_SYS (pthread_condattr_destroy, int, (pthread_condattr_t *attr)
+                                                 _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_condattr_destroy, int, (pthread_condattr_t *attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_condattr_destroy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_condattr_destroy
+# if HAVE_RAW_DECL_PTHREAD_CONDATTR_DESTROY
+_GL_WARN_ON_USE (pthread_condattr_destroy, "pthread_condattr_destroy is not portable - "
+                 "use gnulib module pthread-cond for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_COND@
+# if @REPLACE_PTHREAD_COND_WAIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_cond_wait
+#   define pthread_cond_wait rpl_pthread_cond_wait
+#  endif
+_GL_FUNCDECL_RPL (pthread_cond_wait, int,
+                  (pthread_cond_t *restrict cond,
+                   pthread_mutex_t *restrict mutex)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (pthread_cond_wait, int,
+                  (pthread_cond_t *restrict cond,
+                   pthread_mutex_t *restrict mutex));
+# else
+#  if !@HAVE_PTHREAD_COND_WAIT@
+_GL_FUNCDECL_SYS (pthread_cond_wait, int,
+                  (pthread_cond_t *restrict cond,
+                   pthread_mutex_t *restrict mutex)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_cond_wait, int,
+                  (pthread_cond_t *restrict cond,
+                   pthread_mutex_t *restrict mutex));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_cond_wait);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_cond_wait
+# if HAVE_RAW_DECL_PTHREAD_COND_WAIT
+_GL_WARN_ON_USE (pthread_cond_wait, "pthread_cond_wait is not portable - "
+                 "use gnulib module pthread-cond for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_COND@
+# if @REPLACE_PTHREAD_COND_TIMEDWAIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_cond_timedwait
+#   define pthread_cond_timedwait rpl_pthread_cond_timedwait
+#  endif
+_GL_FUNCDECL_RPL (pthread_cond_timedwait, int,
+                  (pthread_cond_t *restrict cond,
+                   pthread_mutex_t *restrict mutex,
+                   const struct timespec *restrict abstime)
+                  _GL_ARG_NONNULL ((1, 2, 3)));
+_GL_CXXALIAS_RPL (pthread_cond_timedwait, int,
+                  (pthread_cond_t *restrict cond,
+                   pthread_mutex_t *restrict mutex,
+                   const struct timespec *restrict abstime));
+# else
+#  if !@HAVE_PTHREAD_COND_TIMEDWAIT@
+_GL_FUNCDECL_SYS (pthread_cond_timedwait, int,
+                  (pthread_cond_t *restrict cond,
+                   pthread_mutex_t *restrict mutex,
+                   const struct timespec *restrict abstime)
+                  _GL_ARG_NONNULL ((1, 2, 3)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_cond_timedwait, int,
+                  (pthread_cond_t *restrict cond,
+                   pthread_mutex_t *restrict mutex,
+                   const struct timespec *restrict abstime));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_cond_timedwait);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_cond_timedwait
+# if HAVE_RAW_DECL_PTHREAD_COND_TIMEDWAIT
+_GL_WARN_ON_USE (pthread_cond_timedwait, "pthread_cond_timedwait is not portable - "
+                 "use gnulib module pthread-cond for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_COND@
+# if @REPLACE_PTHREAD_COND_SIGNAL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_cond_signal
+#   define pthread_cond_signal rpl_pthread_cond_signal
+#  endif
+_GL_FUNCDECL_RPL (pthread_cond_signal, int, (pthread_cond_t *cond)
+                                            _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_cond_signal, int, (pthread_cond_t *cond));
+# else
+#  if !@HAVE_PTHREAD_COND_SIGNAL@
+_GL_FUNCDECL_SYS (pthread_cond_signal, int, (pthread_cond_t *cond)
+                                            _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_cond_signal, int, (pthread_cond_t *cond));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_cond_signal);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_cond_signal
+# if HAVE_RAW_DECL_PTHREAD_COND_SIGNAL
+_GL_WARN_ON_USE (pthread_cond_signal, "pthread_cond_signal is not portable - "
+                 "use gnulib module pthread-cond for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_COND@
+# if @REPLACE_PTHREAD_COND_BROADCAST@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_cond_broadcast
+#   define pthread_cond_broadcast rpl_pthread_cond_broadcast
+#  endif
+_GL_FUNCDECL_RPL (pthread_cond_broadcast, int, (pthread_cond_t *cond)
+                                               _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_cond_broadcast, int, (pthread_cond_t *cond));
+# else
+#  if !@HAVE_PTHREAD_COND_BROADCAST@
+_GL_FUNCDECL_SYS (pthread_cond_broadcast, int, (pthread_cond_t *cond)
+                                               _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_cond_broadcast, int, (pthread_cond_t *cond));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_cond_broadcast);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_cond_broadcast
+# if HAVE_RAW_DECL_PTHREAD_COND_BROADCAST
+_GL_WARN_ON_USE (pthread_cond_broadcast, "pthread_cond_broadcast is not portable - "
+                 "use gnulib module pthread-cond for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_COND@
+# if @REPLACE_PTHREAD_COND_DESTROY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_cond_destroy
+#   define pthread_cond_destroy rpl_pthread_cond_destroy
+#  endif
+_GL_FUNCDECL_RPL (pthread_cond_destroy, int, (pthread_cond_t *cond)
+                                             _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_cond_destroy, int, (pthread_cond_t *cond));
+# else
+#  if !@HAVE_PTHREAD_COND_DESTROY@
+_GL_FUNCDECL_SYS (pthread_cond_destroy, int, (pthread_cond_t *cond)
+                                             _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_cond_destroy, int, (pthread_cond_t *cond));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_cond_destroy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_cond_destroy
+# if HAVE_RAW_DECL_PTHREAD_COND_DESTROY
+_GL_WARN_ON_USE (pthread_cond_destroy, "pthread_cond_destroy is not portable - "
+                 "use gnulib module pthread-cond for portability");
+# endif
+#endif
+
+/* =========== Thread-specific storage functions =========== */
+
+#if @GNULIB_PTHREAD_TSS@
+# if @REPLACE_PTHREAD_KEY_CREATE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_key_create
+#   define pthread_key_create rpl_pthread_key_create
+#  endif
+_GL_FUNCDECL_RPL (pthread_key_create, int,
+                  (pthread_key_t *keyp, void (*destructor) (void *))
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_key_create, int,
+                  (pthread_key_t *keyp, void (*destructor) (void *)));
+# else
+#  if !@HAVE_PTHREAD_KEY_CREATE@
+_GL_FUNCDECL_SYS (pthread_key_create, int,
+                  (pthread_key_t *keyp, void (*destructor) (void *))
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS_CAST (pthread_key_create, int,
+                       (pthread_key_t *keyp, void (*destructor) (void *)));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_key_create);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_key_create
+# if HAVE_RAW_DECL_PTHREAD_KEY_CREATE
+_GL_WARN_ON_USE (pthread_key_create, "pthread_key_create is not portable - "
+                 "use gnulib module pthread-tss for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_TSS@
+# if @REPLACE_PTHREAD_SETSPECIFIC@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_setspecific
+#   define pthread_setspecific rpl_pthread_setspecific
+#  endif
+_GL_FUNCDECL_RPL (pthread_setspecific, int,
+                  (pthread_key_t key, const void *value));
+_GL_CXXALIAS_RPL (pthread_setspecific, int,
+                  (pthread_key_t key, const void *value));
+# else
+#  if !@HAVE_PTHREAD_SETSPECIFIC@
+_GL_FUNCDECL_SYS (pthread_setspecific, int,
+                  (pthread_key_t key, const void *value));
+#  endif
+_GL_CXXALIAS_SYS (pthread_setspecific, int,
+                  (pthread_key_t key, const void *value));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_setspecific);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_setspecific
+# if HAVE_RAW_DECL_PTHREAD_SETSPECIFIC
+_GL_WARN_ON_USE (pthread_setspecific, "pthread_setspecific is not portable - "
+                 "use gnulib module pthread-tss for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_TSS@
+# if @REPLACE_PTHREAD_GETSPECIFIC@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_getspecific
+#   define pthread_getspecific rpl_pthread_getspecific
+#  endif
+_GL_FUNCDECL_RPL (pthread_getspecific, void *, (pthread_key_t key));
+_GL_CXXALIAS_RPL (pthread_getspecific, void *, (pthread_key_t key));
+# else
+#  if !@HAVE_PTHREAD_GETSPECIFIC@
+_GL_FUNCDECL_SYS (pthread_getspecific, void *, (pthread_key_t key));
+#  endif
+_GL_CXXALIAS_SYS (pthread_getspecific, void *, (pthread_key_t key));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_getspecific);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_getspecific
+# if HAVE_RAW_DECL_PTHREAD_GETSPECIFIC
+_GL_WARN_ON_USE (pthread_getspecific, "pthread_getspecific is not portable - "
+                 "use gnulib module pthread-tss for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_TSS@
+# if @REPLACE_PTHREAD_KEY_DELETE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_key_delete
+#   define pthread_key_delete rpl_pthread_key_delete
+#  endif
+_GL_FUNCDECL_RPL (pthread_key_delete, int, (pthread_key_t key));
+_GL_CXXALIAS_RPL (pthread_key_delete, int, (pthread_key_t key));
+# else
+#  if !@HAVE_PTHREAD_KEY_DELETE@
+_GL_FUNCDECL_SYS (pthread_key_delete, int, (pthread_key_t key));
+#  endif
+_GL_CXXALIAS_SYS (pthread_key_delete, int, (pthread_key_t key));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_key_delete);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_key_delete
+# if HAVE_RAW_DECL_PTHREAD_KEY_DELETE
+_GL_WARN_ON_USE (pthread_key_delete, "pthread_key_delete is not portable - "
+                 "use gnulib module pthread-tss for portability");
+# endif
+#endif
+
+/* =========== Spinlock functions =========== */
+
+#if @GNULIB_PTHREAD_SPIN@
+# if @REPLACE_PTHREAD_SPIN_INIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_spin_init
+#   define pthread_spin_init rpl_pthread_spin_init
+#  endif
+_GL_FUNCDECL_RPL (pthread_spin_init, int,
+                  (pthread_spinlock_t *lock, int shared_across_processes)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_spin_init, int,
+                  (pthread_spinlock_t *lock, int shared_across_processes));
+# else
+#  if !@HAVE_PTHREAD_SPIN_INIT@
+_GL_FUNCDECL_SYS (pthread_spin_init, int,
+                  (pthread_spinlock_t *lock, int shared_across_processes)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_spin_init, int,
+                  (pthread_spinlock_t *lock, int shared_across_processes));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_spin_init);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_spin_init
+# if HAVE_RAW_DECL_PTHREAD_SPIN_INIT
+_GL_WARN_ON_USE (pthread_spin_init, "pthread_spin_init is not portable - "
+                 "use gnulib module pthread-spin for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_SPIN@
+# if @REPLACE_PTHREAD_SPIN_LOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_spin_lock
+#   define pthread_spin_lock rpl_pthread_spin_lock
+#  endif
+_GL_FUNCDECL_RPL (pthread_spin_lock, int, (pthread_spinlock_t *lock)
+                                          _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_spin_lock, int, (pthread_spinlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_SPIN_LOCK@
+_GL_FUNCDECL_SYS (pthread_spin_lock, int, (pthread_spinlock_t *lock)
+                                          _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_spin_lock, int, (pthread_spinlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_spin_lock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_spin_lock
+# if HAVE_RAW_DECL_PTHREAD_SPIN_LOCK
+_GL_WARN_ON_USE (pthread_spin_lock, "pthread_spin_lock is not portable - "
+                 "use gnulib module pthread-spin for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_SPIN@
+# if @REPLACE_PTHREAD_SPIN_TRYLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_spin_trylock
+#   define pthread_spin_trylock rpl_pthread_spin_trylock
+#  endif
+_GL_FUNCDECL_RPL (pthread_spin_trylock, int, (pthread_spinlock_t *lock)
+                                             _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_spin_trylock, int, (pthread_spinlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_SPIN_TRYLOCK@
+_GL_FUNCDECL_SYS (pthread_spin_trylock, int, (pthread_spinlock_t *lock)
+                                             _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_spin_trylock, int, (pthread_spinlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_spin_trylock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_spin_trylock
+# if HAVE_RAW_DECL_PTHREAD_SPIN_TRYLOCK
+_GL_WARN_ON_USE (pthread_spin_trylock, "pthread_spin_trylock is not portable - "
+                 "use gnulib module pthread-spin for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_SPIN@
+# if @REPLACE_PTHREAD_SPIN_UNLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_spin_unlock
+#   define pthread_spin_unlock rpl_pthread_spin_unlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_spin_unlock, int, (pthread_spinlock_t *lock)
+                                            _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_spin_unlock, int, (pthread_spinlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_SPIN_UNLOCK@
+_GL_FUNCDECL_SYS (pthread_spin_unlock, int, (pthread_spinlock_t *lock)
+                                            _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_spin_unlock, int, (pthread_spinlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_spin_unlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_spin_unlock
+# if HAVE_RAW_DECL_PTHREAD_SPIN_UNLOCK
+_GL_WARN_ON_USE (pthread_spin_unlock, "pthread_spin_unlock is not portable - "
+                 "use gnulib module pthread-spin for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_SPIN@
+# if @REPLACE_PTHREAD_SPIN_DESTROY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_spin_destroy
+#   define pthread_spin_destroy rpl_pthread_spin_destroy
+#  endif
+_GL_FUNCDECL_RPL (pthread_spin_destroy, int, (pthread_spinlock_t *lock)
+                                             _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_spin_destroy, int, (pthread_spinlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_SPIN_DESTROY@
+_GL_FUNCDECL_SYS (pthread_spin_destroy, int, (pthread_spinlock_t *lock)
+                                             _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_spin_destroy, int, (pthread_spinlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_spin_destroy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_spin_destroy
+# if HAVE_RAW_DECL_PTHREAD_SPIN_DESTROY
+_GL_WARN_ON_USE (pthread_spin_destroy, "pthread_spin_destroy is not portable - "
+                 "use gnulib module pthread-spin for portability");
+# endif
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_PTHREAD_H_ */
+#endif /* _@GUARD_PREFIX@_PTHREAD_H_ */
+#endif
diff --git a/src/grep/gnulib-tests/pthread_sigmask.c b/src/grep/gnulib-tests/pthread_sigmask.c
new file mode 100644
index 0000000..11b7091
--- /dev/null
+++ b/src/grep/gnulib-tests/pthread_sigmask.c
@@ -0,0 +1,92 @@
+/* POSIX compatible signal blocking for threads.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <signal.h>
+
+#include <errno.h>
+#include <stddef.h>
+
+#if PTHREAD_SIGMASK_INEFFECTIVE
+# include <string.h>
+#endif
+
+#if PTHREAD_SIGMASK_UNBLOCK_BUG
+# include <unistd.h>
+#endif
+
+int
+pthread_sigmask (int how, const sigset_t *new_mask, sigset_t *old_mask)
+#undef pthread_sigmask
+{
+#if HAVE_PTHREAD_SIGMASK
+  int ret;
+
+# if PTHREAD_SIGMASK_INEFFECTIVE
+  sigset_t omask, omask_copy;
+  sigset_t *old_mask_ptr = &omask;
+  sigemptyset (&omask);
+  /* Add a signal unlikely to be blocked, so that OMASK_COPY
+     is unlikely to match the actual mask.  */
+  sigaddset (&omask, SIGILL);
+  memcpy (&omask_copy, &omask, sizeof omask);
+# else
+  sigset_t *old_mask_ptr = old_mask;
+# endif
+
+  ret = pthread_sigmask (how, new_mask, old_mask_ptr);
+
+# if PTHREAD_SIGMASK_INEFFECTIVE
+  if (ret == 0)
+    {
+      /* Detect whether pthread_sigmask is currently ineffective.
+         Don't cache the information: libpthread.so could be dynamically
+         loaded after the program started and after pthread_sigmask was
+         called for the first time.  */
+      if (memcmp (&omask_copy, &omask, sizeof omask) == 0
+          && pthread_sigmask (1729, &omask_copy, NULL) == 0)
+        {
+          /* pthread_sigmask is currently ineffective.  The program is not
+             linked to -lpthread.  So use sigprocmask instead.  */
+          return (sigprocmask (how, new_mask, old_mask) < 0 ? errno : 0);
+        }
+
+      if (old_mask)
+        memcpy (old_mask, &omask, sizeof omask);
+    }
+# endif
+# if PTHREAD_SIGMASK_FAILS_WITH_ERRNO
+  if (ret == -1)
+    return errno;
+# endif
+# if PTHREAD_SIGMASK_UNBLOCK_BUG
+  if (ret == 0
+      && new_mask != NULL
+      && (how == SIG_UNBLOCK || how == SIG_SETMASK))
+    {
+      /* Give the OS the opportunity to raise signals that were pending before
+         the pthread_sigmask call and have now been unblocked.  */
+      usleep (1);
+    }
+# endif
+  return ret;
+#else
+  int ret = sigprocmask (how, new_mask, old_mask);
+  return (ret < 0 ? errno : 0);
+#endif
+}
diff --git a/src/grep/gnulib-tests/putenv.c b/src/grep/gnulib-tests/putenv.c
new file mode 100644
index 0000000..435d10f
--- /dev/null
+++ b/src/grep/gnulib-tests/putenv.c
@@ -0,0 +1,196 @@
+/* Copyright (C) 1991, 1994, 1997-1998, 2000, 2003-2021 Free Software
+   Foundation, Inc.
+
+   NOTE: The canonical source of this file is maintained with the GNU C
+   Library.  Bugs can be reported to bug-glibc@prep.ai.mit.edu.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include <stddef.h>
+
+/* Include errno.h *after* sys/types.h to work around header problems
+   on AIX 3.2.5.  */
+#include <errno.h>
+#ifndef __set_errno
+# define __set_errno(ev) ((errno) = (ev))
+#endif
+
+#include <string.h>
+#include <unistd.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+#endif
+
+#if _LIBC
+# if HAVE_GNU_LD
+#  define environ __environ
+# else
+extern char **environ;
+# endif
+#endif
+
+#if _LIBC
+/* This lock protects against simultaneous modifications of 'environ'.  */
+# include <bits/libc-lock.h>
+__libc_lock_define_initialized (static, envlock)
+# define LOCK   __libc_lock_lock (envlock)
+# define UNLOCK __libc_lock_unlock (envlock)
+#else
+# define LOCK
+# define UNLOCK
+#endif
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Don't assume that UNICODE is not defined.  */
+# undef SetEnvironmentVariable
+# define SetEnvironmentVariable SetEnvironmentVariableA
+#endif
+
+static int
+_unsetenv (const char *name)
+{
+  size_t len;
+#if !HAVE_DECL__PUTENV
+  char **ep;
+#endif
+
+  if (name == NULL || *name == '\0' || strchr (name, '=') != NULL)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  len = strlen (name);
+
+#if HAVE_DECL__PUTENV
+  {
+    int putenv_result;
+    char *name_ = malloc (len + 2);
+    memcpy (name_, name, len);
+    name_[len] = '=';
+    name_[len + 1] = 0;
+    putenv_result = _putenv (name_);
+    free (name_);
+    return putenv_result;
+  }
+#else
+
+  LOCK;
+
+  ep = environ;
+  while (*ep != NULL)
+    if (!strncmp (*ep, name, len) && (*ep)[len] == '=')
+      {
+        /* Found it.  Remove this pointer by moving later ones back.  */
+        char **dp = ep;
+
+        do
+          dp[0] = dp[1];
+        while (*dp++);
+        /* Continue the loop in case NAME appears again.  */
+      }
+    else
+      ++ep;
+
+  UNLOCK;
+
+  return 0;
+#endif
+}
+
+
+/* Put STRING, which is of the form "NAME=VALUE", in the environment.
+   If STRING contains no '=', then remove STRING from the environment.  */
+int
+putenv (char *string)
+{
+  const char *name_end = strchr (string, '=');
+  char **ep;
+
+  if (name_end == NULL)
+    {
+      /* Remove the variable from the environment.  */
+      return _unsetenv (string);
+    }
+
+#if HAVE_DECL__PUTENV
+  /* Rely on _putenv to allocate the new environment.  If other
+     parts of the application use _putenv, the !HAVE_DECL__PUTENV code
+     would fight over who owns the environ vector, causing a crash.  */
+  if (name_end[1])
+    return _putenv (string);
+  else
+    {
+      /* _putenv ("NAME=") unsets NAME, so invoke _putenv ("NAME= ")
+         to allocate the environ vector and then replace the new
+         entry with "NAME=".  */
+      int putenv_result;
+      char *name_x = malloc (name_end - string + sizeof "= ");
+      if (!name_x)
+        return -1;
+      memcpy (name_x, string, name_end - string + 1);
+      name_x[name_end - string + 1] = ' ';
+      name_x[name_end - string + 2] = 0;
+      putenv_result = _putenv (name_x);
+      for (ep = environ; *ep; ep++)
+        if (strcmp (*ep, name_x) == 0)
+          {
+            *ep = string;
+            break;
+          }
+# if defined _WIN32 && ! defined __CYGWIN__
+      if (putenv_result == 0)
+        {
+          /* _putenv propagated "NAME= " into the subprocess environment;
+             fix that by calling SetEnvironmentVariable directly.  */
+          name_x[name_end - string] = 0;
+          putenv_result = SetEnvironmentVariable (name_x, "") ? 0 : -1;
+          errno = ENOMEM; /* ENOMEM is the only way to fail.  */
+        }
+# endif
+      free (name_x);
+      return putenv_result;
+    }
+#else
+  for (ep = environ; *ep; ep++)
+    if (strncmp (*ep, string, name_end - string) == 0
+        && (*ep)[name_end - string] == '=')
+      break;
+
+  if (*ep)
+    *ep = string;
+  else
+    {
+      static char **last_environ = NULL;
+      size_t size = ep - environ;
+      char **new_environ = malloc ((size + 2) * sizeof *new_environ);
+      if (! new_environ)
+        return -1;
+      new_environ[0] = string;
+      memcpy (new_environ + 1, environ, (size + 1) * sizeof *new_environ);
+      free (last_environ);
+      last_environ = new_environ;
+      environ = new_environ;
+    }
+
+  return 0;
+#endif
+}
diff --git a/src/grep/gnulib-tests/sched.in.h b/src/grep/gnulib-tests/sched.in.h
new file mode 100644
index 0000000..cdfe1ae
--- /dev/null
+++ b/src/grep/gnulib-tests/sched.in.h
@@ -0,0 +1,99 @@
+/* A GNU-like <sched.h>.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _@GUARD_PREFIX@_SCHED_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard.  */
+#if @HAVE_SCHED_H@
+# if @HAVE_SYS_CDEFS_H@
+#  include <sys/cdefs.h>
+# endif
+# @INCLUDE_NEXT@ @NEXT_SCHED_H@
+#endif
+
+#ifndef _@GUARD_PREFIX@_SCHED_H
+#define _@GUARD_PREFIX@_SCHED_H
+
+/* Get pid_t.
+   This is needed on glibc 2.11 (see
+   glibc bug <https://sourceware.org/bugzilla/show_bug.cgi?id=13198>)
+   and Mac OS X 10.5.  */
+#include <sys/types.h>
+
+#ifdef __KLIBC__
+/* On OS/2 kLIBC, struct sched_param is in spawn.h.  */
+# include <spawn.h>
+#endif
+
+#ifdef __VMS
+/* On OpenVMS, struct sched_param is in <pthread.h>.  */
+# include <pthread.h>
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+#if !@HAVE_STRUCT_SCHED_PARAM@
+
+# if !GNULIB_defined_struct_sched_param
+struct sched_param
+{
+  int sched_priority;
+};
+#  define GNULIB_defined_struct_sched_param 1
+# endif
+
+#endif
+
+#if !(defined SCHED_FIFO && defined SCHED_RR && defined SCHED_OTHER)
+# define SCHED_FIFO   1
+# define SCHED_RR     2
+# define SCHED_OTHER  0
+#endif
+
+#if @GNULIB_SCHED_YIELD@
+# if @REPLACE_SCHED_YIELD@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef sched_yield
+#   define sched_yield rpl_sched_yield
+#  endif
+_GL_FUNCDECL_RPL (sched_yield, int, (void));
+_GL_CXXALIAS_RPL (sched_yield, int, (void));
+# else
+#  if !@HAVE_SCHED_YIELD@
+_GL_FUNCDECL_SYS (sched_yield, int, (void));
+#  endif
+_GL_CXXALIAS_SYS (sched_yield, int, (void));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (sched_yield);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef sched_yield
+# if HAVE_RAW_DECL_SCHED_YIELD
+_GL_WARN_ON_USE (sched_yield, "sched_yield is not portable - "
+                 "use gnulib module sched_yield for portability");
+# endif
+#endif
+
+#endif /* _@GUARD_PREFIX@_SCHED_H */
+#endif /* _@GUARD_PREFIX@_SCHED_H */
diff --git a/src/grep/gnulib-tests/select.c b/src/grep/gnulib-tests/select.c
new file mode 100644
index 0000000..eddac4b
--- /dev/null
+++ b/src/grep/gnulib-tests/select.c
@@ -0,0 +1,598 @@
+/* Emulation for select(2)
+   Contributed by Paolo Bonzini.
+
+   Copyright 2008-2021 Free Software Foundation, Inc.
+
+   This file is part of gnulib.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <sys/select.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Native Windows.  */
+
+#include <alloca.h>
+#include <assert.h>
+#include <sys/types.h>
+#include <errno.h>
+#include <limits.h>
+
+#include <winsock2.h>
+#include <windows.h>
+#include <io.h>
+#include <stdio.h>
+#include <conio.h>
+#include <time.h>
+
+/* Get the overridden 'struct timeval'.  */
+#include <sys/time.h>
+
+#if GNULIB_MSVC_NOTHROW
+# include "msvc-nothrow.h"
+#else
+# include <io.h>
+#endif
+
+#undef select
+
+/* Don't assume that UNICODE is not defined.  */
+#undef GetModuleHandle
+#define GetModuleHandle GetModuleHandleA
+#undef PeekConsoleInput
+#define PeekConsoleInput PeekConsoleInputA
+#undef CreateEvent
+#define CreateEvent CreateEventA
+#undef PeekMessage
+#define PeekMessage PeekMessageA
+#undef DispatchMessage
+#define DispatchMessage DispatchMessageA
+
+/* Avoid warnings from gcc -Wcast-function-type.  */
+#define GetProcAddress \
+  (void *) GetProcAddress
+
+struct bitset {
+  unsigned char in[FD_SETSIZE / CHAR_BIT];
+  unsigned char out[FD_SETSIZE / CHAR_BIT];
+};
+
+/* Declare data structures for ntdll functions.  */
+typedef struct _FILE_PIPE_LOCAL_INFORMATION {
+  ULONG NamedPipeType;
+  ULONG NamedPipeConfiguration;
+  ULONG MaximumInstances;
+  ULONG CurrentInstances;
+  ULONG InboundQuota;
+  ULONG ReadDataAvailable;
+  ULONG OutboundQuota;
+  ULONG WriteQuotaAvailable;
+  ULONG NamedPipeState;
+  ULONG NamedPipeEnd;
+} FILE_PIPE_LOCAL_INFORMATION, *PFILE_PIPE_LOCAL_INFORMATION;
+
+typedef struct _IO_STATUS_BLOCK
+{
+  union {
+    DWORD Status;
+    PVOID Pointer;
+  } u;
+  ULONG_PTR Information;
+} IO_STATUS_BLOCK, *PIO_STATUS_BLOCK;
+
+typedef enum _FILE_INFORMATION_CLASS {
+  FilePipeLocalInformation = 24
+} FILE_INFORMATION_CLASS, *PFILE_INFORMATION_CLASS;
+
+typedef DWORD (WINAPI *PNtQueryInformationFile)
+         (HANDLE, IO_STATUS_BLOCK *, VOID *, ULONG, FILE_INFORMATION_CLASS);
+
+#ifndef PIPE_BUF
+#define PIPE_BUF        512
+#endif
+
+static BOOL IsConsoleHandle (HANDLE h)
+{
+  DWORD mode;
+  return GetConsoleMode (h, &mode) != 0;
+}
+
+static BOOL
+IsSocketHandle (HANDLE h)
+{
+  WSANETWORKEVENTS ev;
+
+  if (IsConsoleHandle (h))
+    return FALSE;
+
+  /* Under Wine, it seems that getsockopt returns 0 for pipes too.
+     WSAEnumNetworkEvents instead distinguishes the two correctly.  */
+  ev.lNetworkEvents = 0xDEADBEEF;
+  WSAEnumNetworkEvents ((SOCKET) h, NULL, &ev);
+  return ev.lNetworkEvents != 0xDEADBEEF;
+}
+
+/* Compute output fd_sets for libc descriptor FD (whose Windows handle is
+   H).  */
+
+static int
+windows_poll_handle (HANDLE h, int fd,
+                     struct bitset *rbits,
+                     struct bitset *wbits,
+                     struct bitset *xbits)
+{
+  BOOL read, write, except;
+  int i, ret;
+  INPUT_RECORD *irbuffer;
+  DWORD avail, nbuffer;
+  BOOL bRet;
+  IO_STATUS_BLOCK iosb;
+  FILE_PIPE_LOCAL_INFORMATION fpli;
+  static PNtQueryInformationFile NtQueryInformationFile;
+  static BOOL once_only;
+
+  read = write = except = FALSE;
+  switch (GetFileType (h))
+    {
+    case FILE_TYPE_DISK:
+      read = TRUE;
+      write = TRUE;
+      break;
+
+    case FILE_TYPE_PIPE:
+      if (!once_only)
+        {
+          NtQueryInformationFile = (PNtQueryInformationFile)
+            GetProcAddress (GetModuleHandle ("ntdll.dll"),
+                            "NtQueryInformationFile");
+          once_only = TRUE;
+        }
+
+      if (PeekNamedPipe (h, NULL, 0, NULL, &avail, NULL) != 0)
+        {
+          if (avail)
+            read = TRUE;
+        }
+      else if (GetLastError () == ERROR_BROKEN_PIPE)
+        ;
+
+      else
+        {
+          /* It was the write-end of the pipe.  Check if it is writable.
+             If NtQueryInformationFile fails, optimistically assume the pipe is
+             writable.  This could happen on Windows 9x, where
+             NtQueryInformationFile is not available, or if we inherit a pipe
+             that doesn't permit FILE_READ_ATTRIBUTES access on the write end
+             (I think this should not happen since Windows XP SP2; WINE seems
+             fine too).  Otherwise, ensure that enough space is available for
+             atomic writes.  */
+          memset (&iosb, 0, sizeof (iosb));
+          memset (&fpli, 0, sizeof (fpli));
+
+          if (!NtQueryInformationFile
+              || NtQueryInformationFile (h, &iosb, &fpli, sizeof (fpli),
+                                         FilePipeLocalInformation)
+              || fpli.WriteQuotaAvailable >= PIPE_BUF
+              || (fpli.OutboundQuota < PIPE_BUF &&
+                  fpli.WriteQuotaAvailable == fpli.OutboundQuota))
+            write = TRUE;
+        }
+      break;
+
+    case FILE_TYPE_CHAR:
+      write = TRUE;
+      if (!(rbits->in[fd / CHAR_BIT] & (1 << (fd & (CHAR_BIT - 1)))))
+        break;
+
+      ret = WaitForSingleObject (h, 0);
+      if (ret == WAIT_OBJECT_0)
+        {
+          if (!IsConsoleHandle (h))
+            {
+              read = TRUE;
+              break;
+            }
+
+          nbuffer = avail = 0;
+          bRet = GetNumberOfConsoleInputEvents (h, &nbuffer);
+
+          /* Screen buffers handles are filtered earlier.  */
+          assert (bRet);
+          if (nbuffer == 0)
+            {
+              except = TRUE;
+              break;
+            }
+
+          irbuffer = (INPUT_RECORD *) alloca (nbuffer * sizeof (INPUT_RECORD));
+          bRet = PeekConsoleInput (h, irbuffer, nbuffer, &avail);
+          if (!bRet || avail == 0)
+            {
+              except = TRUE;
+              break;
+            }
+
+          for (i = 0; i < avail; i++)
+            if (irbuffer[i].EventType == KEY_EVENT)
+              read = TRUE;
+        }
+      break;
+
+    default:
+      ret = WaitForSingleObject (h, 0);
+      write = TRUE;
+      if (ret == WAIT_OBJECT_0)
+        read = TRUE;
+
+      break;
+    }
+
+  ret = 0;
+  if (read && (rbits->in[fd / CHAR_BIT] & (1 << (fd & (CHAR_BIT - 1)))))
+    {
+      rbits->out[fd / CHAR_BIT] |= (1 << (fd & (CHAR_BIT - 1)));
+      ret++;
+    }
+
+  if (write && (wbits->in[fd / CHAR_BIT] & (1 << (fd & (CHAR_BIT - 1)))))
+    {
+      wbits->out[fd / CHAR_BIT] |= (1 << (fd & (CHAR_BIT - 1)));
+      ret++;
+    }
+
+  if (except && (xbits->in[fd / CHAR_BIT] & (1 << (fd & (CHAR_BIT - 1)))))
+    {
+      xbits->out[fd / CHAR_BIT] |= (1 << (fd & (CHAR_BIT - 1)));
+      ret++;
+    }
+
+  return ret;
+}
+
+int
+rpl_select (int nfds, fd_set *rfds, fd_set *wfds, fd_set *xfds,
+            struct timeval *timeout)
+#undef timeval
+{
+  static struct timeval tv0;
+  static HANDLE hEvent;
+  HANDLE h, handle_array[FD_SETSIZE + 2];
+  fd_set handle_rfds, handle_wfds, handle_xfds;
+  struct bitset rbits, wbits, xbits;
+  unsigned char anyfds_in[FD_SETSIZE / CHAR_BIT];
+  DWORD ret, wait_timeout, nhandles, nsock, nbuffer;
+  MSG msg;
+  int i, fd, rc;
+  clock_t tend;
+
+  if (nfds > FD_SETSIZE)
+    nfds = FD_SETSIZE;
+
+  if (!timeout)
+    wait_timeout = INFINITE;
+  else
+    {
+      wait_timeout = timeout->tv_sec * 1000 + timeout->tv_usec / 1000;
+
+      /* select is also used as a portable usleep.  */
+      if (!rfds && !wfds && !xfds)
+        {
+          Sleep (wait_timeout);
+          return 0;
+        }
+    }
+
+  if (!hEvent)
+    hEvent = CreateEvent (NULL, FALSE, FALSE, NULL);
+
+  handle_array[0] = hEvent;
+  nhandles = 1;
+  nsock = 0;
+
+  /* Copy descriptors to bitsets.  At the same time, eliminate
+     bits in the "wrong" direction for console input buffers
+     and screen buffers, because screen buffers are waitable
+     and they will block until a character is available.  */
+  memset (&rbits, 0, sizeof (rbits));
+  memset (&wbits, 0, sizeof (wbits));
+  memset (&xbits, 0, sizeof (xbits));
+  memset (anyfds_in, 0, sizeof (anyfds_in));
+  if (rfds)
+    for (i = 0; i < rfds->fd_count; i++)
+      {
+        fd = rfds->fd_array[i];
+        h = (HANDLE) _get_osfhandle (fd);
+        if (IsConsoleHandle (h)
+            && !GetNumberOfConsoleInputEvents (h, &nbuffer))
+          continue;
+
+        rbits.in[fd / CHAR_BIT] |= 1 << (fd & (CHAR_BIT - 1));
+        anyfds_in[fd / CHAR_BIT] |= 1 << (fd & (CHAR_BIT - 1));
+      }
+  else
+    rfds = (fd_set *) alloca (sizeof (fd_set));
+
+  if (wfds)
+    for (i = 0; i < wfds->fd_count; i++)
+      {
+        fd = wfds->fd_array[i];
+        h = (HANDLE) _get_osfhandle (fd);
+        if (IsConsoleHandle (h)
+            && GetNumberOfConsoleInputEvents (h, &nbuffer))
+          continue;
+
+        wbits.in[fd / CHAR_BIT] |= 1 << (fd & (CHAR_BIT - 1));
+        anyfds_in[fd / CHAR_BIT] |= 1 << (fd & (CHAR_BIT - 1));
+      }
+  else
+    wfds = (fd_set *) alloca (sizeof (fd_set));
+
+  if (xfds)
+    for (i = 0; i < xfds->fd_count; i++)
+      {
+        fd = xfds->fd_array[i];
+        xbits.in[fd / CHAR_BIT] |= 1 << (fd & (CHAR_BIT - 1));
+        anyfds_in[fd / CHAR_BIT] |= 1 << (fd & (CHAR_BIT - 1));
+      }
+  else
+    xfds = (fd_set *) alloca (sizeof (fd_set));
+
+  /* Zero all the fd_sets, including the application's.  */
+  FD_ZERO (rfds);
+  FD_ZERO (wfds);
+  FD_ZERO (xfds);
+  FD_ZERO (&handle_rfds);
+  FD_ZERO (&handle_wfds);
+  FD_ZERO (&handle_xfds);
+
+  /* Classify handles.  Create fd sets for sockets, poll the others. */
+  for (i = 0; i < nfds; i++)
+    {
+      if ((anyfds_in[i / CHAR_BIT] & (1 << (i & (CHAR_BIT - 1)))) == 0)
+        continue;
+
+      h = (HANDLE) _get_osfhandle (i);
+      if (!h)
+        {
+          errno = EBADF;
+          return -1;
+        }
+
+      if (IsSocketHandle (h))
+        {
+          int requested = FD_CLOSE;
+
+          /* See above; socket handles are mapped onto select, but we
+             need to map descriptors to handles.  */
+          if (rbits.in[i / CHAR_BIT] & (1 << (i & (CHAR_BIT - 1))))
+            {
+              requested |= FD_READ | FD_ACCEPT;
+              FD_SET ((SOCKET) h, rfds);
+              FD_SET ((SOCKET) h, &handle_rfds);
+            }
+          if (wbits.in[i / CHAR_BIT] & (1 << (i & (CHAR_BIT - 1))))
+            {
+              requested |= FD_WRITE | FD_CONNECT;
+              FD_SET ((SOCKET) h, wfds);
+              FD_SET ((SOCKET) h, &handle_wfds);
+            }
+          if (xbits.in[i / CHAR_BIT] & (1 << (i & (CHAR_BIT - 1))))
+            {
+              requested |= FD_OOB;
+              FD_SET ((SOCKET) h, xfds);
+              FD_SET ((SOCKET) h, &handle_xfds);
+            }
+
+          WSAEventSelect ((SOCKET) h, hEvent, requested);
+          nsock++;
+        }
+      else
+        {
+          handle_array[nhandles++] = h;
+
+          /* Poll now.  If we get an event, do not wait below.  */
+          if (wait_timeout != 0
+              && windows_poll_handle (h, i, &rbits, &wbits, &xbits))
+            wait_timeout = 0;
+        }
+    }
+
+  /* Place a sentinel at the end of the array.  */
+  handle_array[nhandles] = NULL;
+
+  /* When will the waiting period expire?  */
+  if (wait_timeout != INFINITE)
+    tend = clock () + wait_timeout;
+
+restart:
+  if (wait_timeout == 0 || nsock == 0)
+    rc = 0;
+  else
+    {
+      /* See if we need to wait in the loop below.  If any select is ready,
+         do MsgWaitForMultipleObjects anyway to dispatch messages, but
+         no need to call select again.  */
+      rc = select (0, &handle_rfds, &handle_wfds, &handle_xfds, &tv0);
+      if (rc == 0)
+        {
+          /* Restore the fd_sets for the other select we do below.  */
+          memcpy (&handle_rfds, rfds, sizeof (fd_set));
+          memcpy (&handle_wfds, wfds, sizeof (fd_set));
+          memcpy (&handle_xfds, xfds, sizeof (fd_set));
+        }
+      else
+        wait_timeout = 0;
+    }
+
+  /* How much is left to wait?  */
+  if (wait_timeout != INFINITE)
+    {
+      clock_t tnow = clock ();
+      if (tend >= tnow)
+        wait_timeout = tend - tnow;
+      else
+        wait_timeout = 0;
+    }
+
+  for (;;)
+    {
+      ret = MsgWaitForMultipleObjects (nhandles, handle_array, FALSE,
+                                       wait_timeout, QS_ALLINPUT);
+
+      if (ret == WAIT_OBJECT_0 + nhandles)
+        {
+          /* new input of some other kind */
+          BOOL bRet;
+          while ((bRet = PeekMessage (&msg, NULL, 0, 0, PM_REMOVE)) != 0)
+            {
+              TranslateMessage (&msg);
+              DispatchMessage (&msg);
+            }
+        }
+      else
+        break;
+    }
+
+  /* If we haven't done it yet, check the status of the sockets.  */
+  if (rc == 0 && nsock > 0)
+    rc = select (0, &handle_rfds, &handle_wfds, &handle_xfds, &tv0);
+
+  if (nhandles > 1)
+    {
+      /* Count results that are not counted in the return value of select.  */
+      nhandles = 1;
+      for (i = 0; i < nfds; i++)
+        {
+          if ((anyfds_in[i / CHAR_BIT] & (1 << (i & (CHAR_BIT - 1)))) == 0)
+            continue;
+
+          h = (HANDLE) _get_osfhandle (i);
+          if (h == handle_array[nhandles])
+            {
+              /* Not a socket.  */
+              nhandles++;
+              windows_poll_handle (h, i, &rbits, &wbits, &xbits);
+              if (rbits.out[i / CHAR_BIT] & (1 << (i & (CHAR_BIT - 1)))
+                  || wbits.out[i / CHAR_BIT] & (1 << (i & (CHAR_BIT - 1)))
+                  || xbits.out[i / CHAR_BIT] & (1 << (i & (CHAR_BIT - 1))))
+                rc++;
+            }
+        }
+
+      if (rc == 0
+          && (wait_timeout == INFINITE
+              /* If NHANDLES > 1, but no bits are set, it means we've
+                 been told incorrectly that some handle was signaled.
+                 This happens with anonymous pipes, which always cause
+                 MsgWaitForMultipleObjects to exit immediately, but no
+                 data is found ready to be read by windows_poll_handle.
+                 To avoid a total failure (whereby we return zero and
+                 don't wait at all), let's poll in a more busy loop.  */
+              || (wait_timeout != 0 && nhandles > 1)))
+        {
+          /* Sleep 1 millisecond to avoid busy wait and retry with the
+             original fd_sets.  */
+          memcpy (&handle_rfds, rfds, sizeof (fd_set));
+          memcpy (&handle_wfds, wfds, sizeof (fd_set));
+          memcpy (&handle_xfds, xfds, sizeof (fd_set));
+          SleepEx (1, TRUE);
+          goto restart;
+        }
+      if (timeout && wait_timeout == 0 && rc == 0)
+        timeout->tv_sec = timeout->tv_usec = 0;
+    }
+
+  /* Now fill in the results.  */
+  FD_ZERO (rfds);
+  FD_ZERO (wfds);
+  FD_ZERO (xfds);
+  nhandles = 1;
+  for (i = 0; i < nfds; i++)
+    {
+      if ((anyfds_in[i / CHAR_BIT] & (1 << (i & (CHAR_BIT - 1)))) == 0)
+        continue;
+
+      h = (HANDLE) _get_osfhandle (i);
+      if (h != handle_array[nhandles])
+        {
+          /* Perform handle->descriptor mapping.  */
+          SOCKET s = (SOCKET) h;
+          WSAEventSelect (s, NULL, 0);
+          if (FD_ISSET (s, &handle_rfds))
+            FD_SET (i, rfds);
+          if (FD_ISSET (s, &handle_wfds))
+            FD_SET (i, wfds);
+          if (FD_ISSET (s, &handle_xfds))
+            FD_SET (i, xfds);
+        }
+      else
+        {
+          /* Not a socket.  */
+          nhandles++;
+          if (rbits.out[i / CHAR_BIT] & (1 << (i & (CHAR_BIT - 1))))
+            FD_SET (i, rfds);
+          if (wbits.out[i / CHAR_BIT] & (1 << (i & (CHAR_BIT - 1))))
+            FD_SET (i, wfds);
+          if (xbits.out[i / CHAR_BIT] & (1 << (i & (CHAR_BIT - 1))))
+            FD_SET (i, xfds);
+        }
+    }
+
+  return rc;
+}
+
+#else /* ! Native Windows.  */
+
+#include <stddef.h> /* NULL */
+#include <errno.h>
+#include <unistd.h>
+
+#undef select
+
+int
+rpl_select (int nfds, fd_set *rfds, fd_set *wfds, fd_set *xfds,
+            struct timeval *timeout)
+{
+  int i;
+
+  /* FreeBSD 8.2 has a bug: it does not always detect invalid fds.  */
+  if (nfds < 0 || nfds > FD_SETSIZE)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+  for (i = 0; i < nfds; i++)
+    {
+      if (((rfds && FD_ISSET (i, rfds))
+           || (wfds && FD_ISSET (i, wfds))
+           || (xfds && FD_ISSET (i, xfds)))
+          && dup2 (i, i) != i)
+        return -1;
+    }
+
+  /* Interix 3.5 has a bug: it does not support nfds == 0.  */
+  if (nfds == 0)
+    {
+      nfds = 1;
+      rfds = NULL;
+      wfds = NULL;
+      xfds = NULL;
+    }
+  return select (nfds, rfds, wfds, xfds, timeout);
+}
+
+#endif
diff --git a/src/grep/gnulib-tests/setenv.c b/src/grep/gnulib-tests/setenv.c
new file mode 100644
index 0000000..3ad3477
--- /dev/null
+++ b/src/grep/gnulib-tests/setenv.c
@@ -0,0 +1,390 @@
+/* Copyright (C) 1992, 1995-2003, 2005-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#if !_LIBC
+/* Don't use __attribute__ __nonnull__ in this compilation unit.  Otherwise gcc
+   optimizes away the name == NULL test below.  */
+# define _GL_ARG_NONNULL(params)
+
+# define _GL_USE_STDLIB_ALLOC 1
+# include <config.h>
+#endif
+
+#include <alloca.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include <errno.h>
+#ifndef __set_errno
+# define __set_errno(ev) ((errno) = (ev))
+#endif
+
+#include <string.h>
+#if _LIBC || HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#if !_LIBC
+# include "malloca.h"
+#endif
+
+#if _LIBC || !HAVE_SETENV
+
+#if !_LIBC
+# define __environ      environ
+#endif
+
+#if _LIBC
+/* This lock protects against simultaneous modifications of 'environ'.  */
+# include <bits/libc-lock.h>
+__libc_lock_define_initialized (static, envlock)
+# define LOCK   __libc_lock_lock (envlock)
+# define UNLOCK __libc_lock_unlock (envlock)
+#else
+# define LOCK
+# define UNLOCK
+#endif
+
+/* In the GNU C library we must keep the namespace clean.  */
+#ifdef _LIBC
+# define setenv __setenv
+# define clearenv __clearenv
+# define tfind __tfind
+# define tsearch __tsearch
+#endif
+
+/* In the GNU C library implementation we try to be more clever and
+   allow arbitrarily many changes of the environment given that the used
+   values are from a small set.  Outside glibc this will eat up all
+   memory after a while.  */
+#if defined _LIBC || (defined HAVE_SEARCH_H && defined HAVE_TSEARCH \
+                      && (defined __GNUC__ || defined __clang__))
+# define USE_TSEARCH    1
+# include <search.h>
+typedef int (*compar_fn_t) (const void *, const void *);
+
+/* This is a pointer to the root of the search tree with the known
+   values.  */
+static void *known_values;
+
+# define KNOWN_VALUE(Str) \
+  ({                                                                          \
+    void *value = tfind (Str, &known_values, (compar_fn_t) strcmp);           \
+    value != NULL ? *(char **) value : NULL;                                  \
+  })
+# define STORE_VALUE(Str) \
+  tsearch (Str, &known_values, (compar_fn_t) strcmp)
+
+#else
+# undef USE_TSEARCH
+
+# define KNOWN_VALUE(Str) NULL
+# define STORE_VALUE(Str) do { } while (0)
+
+#endif
+
+
+/* If this variable is not a null pointer we allocated the current
+   environment.  */
+static char **last_environ;
+
+
+/* This function is used by 'setenv' and 'putenv'.  The difference between
+   the two functions is that for the former must create a new string which
+   is then placed in the environment, while the argument of 'putenv'
+   must be used directly.  This is all complicated by the fact that we try
+   to reuse values once generated for a 'setenv' call since we can never
+   free the strings.  */
+int
+__add_to_environ (const char *name, const char *value, const char *combined,
+                  int replace)
+{
+  char **ep;
+  size_t size;
+  const size_t namelen = strlen (name);
+  const size_t vallen = value != NULL ? strlen (value) + 1 : 0;
+
+  LOCK;
+
+  /* We have to get the pointer now that we have the lock and not earlier
+     since another thread might have created a new environment.  */
+  ep = __environ;
+
+  size = 0;
+  if (ep != NULL)
+    {
+      for (; *ep != NULL; ++ep)
+        if (!strncmp (*ep, name, namelen) && (*ep)[namelen] == '=')
+          break;
+        else
+          ++size;
+    }
+
+  if (ep == NULL || *ep == NULL)
+    {
+      char **new_environ;
+#ifdef USE_TSEARCH
+      char *new_value;
+#endif
+
+      /* We allocated this space; we can extend it.  */
+      new_environ =
+        (char **) (last_environ == NULL
+                   ? malloc ((size + 2) * sizeof (char *))
+                   : realloc (last_environ, (size + 2) * sizeof (char *)));
+      if (new_environ == NULL)
+        {
+          /* It's easier to set errno to ENOMEM than to rely on the
+             'malloc-posix' and 'realloc-posix' gnulib modules.  */
+          __set_errno (ENOMEM);
+          UNLOCK;
+          return -1;
+        }
+
+      /* If the whole entry is given add it.  */
+      if (combined != NULL)
+        /* We must not add the string to the search tree since it belongs
+           to the user.  */
+        new_environ[size] = (char *) combined;
+      else
+        {
+          /* See whether the value is already known.  */
+#ifdef USE_TSEARCH
+# ifdef _LIBC
+          new_value = (char *) alloca (namelen + 1 + vallen);
+          __mempcpy (__mempcpy (__mempcpy (new_value, name, namelen), "=", 1),
+                     value, vallen);
+# else
+          new_value = (char *) malloca (namelen + 1 + vallen);
+          if (new_value == NULL)
+            {
+              __set_errno (ENOMEM);
+              UNLOCK;
+              return -1;
+            }
+          memcpy (new_value, name, namelen);
+          new_value[namelen] = '=';
+          memcpy (&new_value[namelen + 1], value, vallen);
+# endif
+
+          new_environ[size] = KNOWN_VALUE (new_value);
+          if (new_environ[size] == NULL)
+#endif
+            {
+              new_environ[size] = (char *) malloc (namelen + 1 + vallen);
+              if (new_environ[size] == NULL)
+                {
+#if defined USE_TSEARCH && !defined _LIBC
+                  freea (new_value);
+#endif
+                  __set_errno (ENOMEM);
+                  UNLOCK;
+                  return -1;
+                }
+
+#ifdef USE_TSEARCH
+              memcpy (new_environ[size], new_value, namelen + 1 + vallen);
+#else
+              memcpy (new_environ[size], name, namelen);
+              new_environ[size][namelen] = '=';
+              memcpy (&new_environ[size][namelen + 1], value, vallen);
+#endif
+              /* And save the value now.  We cannot do this when we remove
+                 the string since then we cannot decide whether it is a
+                 user string or not.  */
+              STORE_VALUE (new_environ[size]);
+            }
+#if defined USE_TSEARCH && !defined _LIBC
+          freea (new_value);
+#endif
+        }
+
+      if (__environ != last_environ)
+        memcpy ((char *) new_environ, (char *) __environ,
+                size * sizeof (char *));
+
+      new_environ[size + 1] = NULL;
+
+      last_environ = __environ = new_environ;
+    }
+  else if (replace)
+    {
+      char *np;
+
+      /* Use the user string if given.  */
+      if (combined != NULL)
+        np = (char *) combined;
+      else
+        {
+#ifdef USE_TSEARCH
+          char *new_value;
+# ifdef _LIBC
+          new_value = alloca (namelen + 1 + vallen);
+          __mempcpy (__mempcpy (__mempcpy (new_value, name, namelen), "=", 1),
+                     value, vallen);
+# else
+          new_value = malloca (namelen + 1 + vallen);
+          if (new_value == NULL)
+            {
+              __set_errno (ENOMEM);
+              UNLOCK;
+              return -1;
+            }
+          memcpy (new_value, name, namelen);
+          new_value[namelen] = '=';
+          memcpy (&new_value[namelen + 1], value, vallen);
+# endif
+
+          np = KNOWN_VALUE (new_value);
+          if (np == NULL)
+#endif
+            {
+              np = (char *) malloc (namelen + 1 + vallen);
+              if (np == NULL)
+                {
+#if defined USE_TSEARCH && !defined _LIBC
+                  freea (new_value);
+#endif
+                  __set_errno (ENOMEM);
+                  UNLOCK;
+                  return -1;
+                }
+
+#ifdef USE_TSEARCH
+              memcpy (np, new_value, namelen + 1 + vallen);
+#else
+              memcpy (np, name, namelen);
+              np[namelen] = '=';
+              memcpy (&np[namelen + 1], value, vallen);
+#endif
+              /* And remember the value.  */
+              STORE_VALUE (np);
+            }
+#if defined USE_TSEARCH && !defined _LIBC
+          freea (new_value);
+#endif
+        }
+
+      *ep = np;
+    }
+
+  UNLOCK;
+
+  return 0;
+}
+
+int
+setenv (const char *name, const char *value, int replace)
+{
+  if (name == NULL || *name == '\0' || strchr (name, '=') != NULL)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  return __add_to_environ (name, value, NULL, replace);
+}
+
+/* The 'clearenv' was planned to be added to POSIX.1 but probably
+   never made it.  Nevertheless the POSIX.9 standard (POSIX bindings
+   for Fortran 77) requires this function.  */
+int
+clearenv (void)
+{
+  LOCK;
+
+  if (__environ == last_environ && __environ != NULL)
+    {
+      /* We allocated this environment so we can free it.  */
+      free (__environ);
+      last_environ = NULL;
+    }
+
+  /* Clear the environment pointer removes the whole environment.  */
+  __environ = NULL;
+
+  UNLOCK;
+
+  return 0;
+}
+
+#ifdef _LIBC
+static void
+free_mem (void)
+{
+  /* Remove all traces.  */
+  clearenv ();
+
+  /* Now remove the search tree.  */
+  __tdestroy (known_values, free);
+  known_values = NULL;
+}
+text_set_element (__libc_subfreeres, free_mem);
+
+
+# undef setenv
+# undef clearenv
+weak_alias (__setenv, setenv)
+weak_alias (__clearenv, clearenv)
+#endif
+
+#endif /* _LIBC || !HAVE_SETENV */
+
+/* The rest of this file is called into use when replacing an existing
+   but buggy setenv.  Known bugs include failure to diagnose invalid
+   name, and consuming a leading '=' from value.  */
+#if HAVE_SETENV
+
+# undef setenv
+# if !HAVE_DECL_SETENV
+extern int setenv (const char *, const char *, int);
+# endif
+# define STREQ(a, b) (strcmp (a, b) == 0)
+
+int
+rpl_setenv (const char *name, const char *value, int replace)
+{
+  int result;
+  if (!name || !*name || strchr (name, '='))
+    {
+      errno = EINVAL;
+      return -1;
+    }
+  /* Call the real setenv even if replace is 0, in case implementation
+     has underlying data to update, such as when environ changes.  */
+  result = setenv (name, value, replace);
+  if (result == 0 && replace && *value == '=')
+    {
+      char *tmp = getenv (name);
+      if (!STREQ (tmp, value))
+        {
+          int saved_errno;
+          size_t len = strlen (value);
+          tmp = malloca (len + 2);
+          /* Since leading '=' is eaten, double it up.  */
+          *tmp = '=';
+          memcpy (tmp + 1, value, len + 1);
+          result = setenv (name, tmp, replace);
+          saved_errno = errno;
+          freea (tmp);
+          errno = saved_errno;
+        }
+    }
+  return result;
+}
+
+#endif /* HAVE_SETENV */
diff --git a/src/grep/gnulib-tests/setlocale.c b/src/grep/gnulib-tests/setlocale.c
new file mode 100644
index 0000000..7a10c4b
--- /dev/null
+++ b/src/grep/gnulib-tests/setlocale.c
@@ -0,0 +1,1673 @@
+/* Set the current locale.  -*- coding: utf-8 -*-
+   Copyright (C) 2009, 2011-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+#include <config.h>
+
+/* Override setlocale() so that when the default locale is requested
+   (locale = ""), the environment variables LC_ALL, LC_*, and LANG are
+   considered.
+   Also include all the functionality from libintl's setlocale() override.  */
+
+/* Please keep this file in sync with
+   gettext/gettext-runtime/intl/setlocale.c !  */
+
+/* Specification.  */
+#include <locale.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "localename.h"
+
+#if HAVE_CFLOCALECOPYPREFERREDLANGUAGES || HAVE_CFPREFERENCESCOPYAPPVALUE
+# if HAVE_CFLOCALECOPYPREFERREDLANGUAGES
+#  include <CoreFoundation/CFLocale.h>
+# elif HAVE_CFPREFERENCESCOPYAPPVALUE
+#  include <CoreFoundation/CFPreferences.h>
+# endif
+# include <CoreFoundation/CFPropertyList.h>
+# include <CoreFoundation/CFArray.h>
+# include <CoreFoundation/CFString.h>
+extern void gl_locale_name_canonicalize (char *name);
+#endif
+
+#if 1
+
+# undef setlocale
+
+/* Which of the replacements to activate?  */
+# if NEED_SETLOCALE_IMPROVED
+#  define setlocale_improved rpl_setlocale
+# elif NEED_SETLOCALE_MTSAFE
+#  define setlocale_mtsafe rpl_setlocale
+# else
+#  error "This file should only be compiled if NEED_SETLOCALE_IMPROVED || NEED_SETLOCALE_MTSAFE."
+# endif
+
+/* Like setlocale, but guaranteed to be multithread-safe if LOCALE == NULL.  */
+# if !SETLOCALE_NULL_ALL_MTSAFE || !SETLOCALE_NULL_ONE_MTSAFE /* i.e. if NEED_SETLOCALE_MTSAFE */
+
+#  if NEED_SETLOCALE_IMPROVED
+static
+#  endif
+char *
+setlocale_mtsafe (int category, const char *locale)
+{
+  if (locale == NULL)
+    return (char *) setlocale_null (category);
+  else
+    return setlocale (category, locale);
+}
+# else /* !NEED_SETLOCALE_MTSAFE */
+
+#  define setlocale_mtsafe setlocale
+
+# endif /* NEED_SETLOCALE_MTSAFE */
+
+# if NEED_SETLOCALE_IMPROVED
+
+/* Return string representation of locale category CATEGORY.  */
+static const char *
+category_to_name (int category)
+{
+  const char *retval;
+
+  switch (category)
+  {
+  case LC_COLLATE:
+    retval = "LC_COLLATE";
+    break;
+  case LC_CTYPE:
+    retval = "LC_CTYPE";
+    break;
+  case LC_MONETARY:
+    retval = "LC_MONETARY";
+    break;
+  case LC_NUMERIC:
+    retval = "LC_NUMERIC";
+    break;
+  case LC_TIME:
+    retval = "LC_TIME";
+    break;
+  case LC_MESSAGES:
+    retval = "LC_MESSAGES";
+    break;
+  default:
+    /* If you have a better idea for a default value let me know.  */
+    retval = "LC_XXX";
+  }
+
+  return retval;
+}
+
+#  if defined _WIN32 && ! defined __CYGWIN__
+
+/* The native Windows setlocale() function expects locale names of the form
+   "German" or "German_Germany" or "DEU", but not "de" or "de_DE".  We need
+   to convert the names from the form with ISO 639 language code and ISO 3166
+   country code to the form with English names or with three-letter identifier.
+   The three-letter identifiers known by a Windows XP SP2 or SP3 are:
+     AFK  Afrikaans_South Africa.1252
+     ARA  Arabic_Saudi Arabia.1256
+     ARB  Arabic_Lebanon.1256
+     ARE  Arabic_Egypt.1256
+     ARG  Arabic_Algeria.1256
+     ARH  Arabic_Bahrain.1256
+     ARI  Arabic_Iraq.1256
+     ARJ  Arabic_Jordan.1256
+     ARK  Arabic_Kuwait.1256
+     ARL  Arabic_Libya.1256
+     ARM  Arabic_Morocco.1256
+     ARO  Arabic_Oman.1256
+     ARQ  Arabic_Qatar.1256
+     ARS  Arabic_Syria.1256
+     ART  Arabic_Tunisia.1256
+     ARU  Arabic_U.A.E..1256
+     ARY  Arabic_Yemen.1256
+     AZE  Azeri (Latin)_Azerbaijan.1254
+     BEL  Belarusian_Belarus.1251
+     BGR  Bulgarian_Bulgaria.1251
+     BSB  Bosnian_Bosnia and Herzegovina.1250
+     BSC  Bosnian (Cyrillic)_Bosnia and Herzegovina.1250  (wrong encoding!)
+     CAT  Catalan_Spain.1252
+     CHH  Chinese_Hong Kong S.A.R..950
+     CHI  Chinese_Singapore.936
+     CHS  Chinese_People's Republic of China.936
+     CHT  Chinese_Taiwan.950
+     CSY  Czech_Czech Republic.1250
+     CYM  Welsh_United Kingdom.1252
+     DAN  Danish_Denmark.1252
+     DEA  German_Austria.1252
+     DEC  German_Liechtenstein.1252
+     DEL  German_Luxembourg.1252
+     DES  German_Switzerland.1252
+     DEU  German_Germany.1252
+     ELL  Greek_Greece.1253
+     ENA  English_Australia.1252
+     ENB  English_Caribbean.1252
+     ENC  English_Canada.1252
+     ENG  English_United Kingdom.1252
+     ENI  English_Ireland.1252
+     ENJ  English_Jamaica.1252
+     ENL  English_Belize.1252
+     ENP  English_Republic of the Philippines.1252
+     ENS  English_South Africa.1252
+     ENT  English_Trinidad and Tobago.1252
+     ENU  English_United States.1252
+     ENW  English_Zimbabwe.1252
+     ENZ  English_New Zealand.1252
+     ESA  Spanish_Panama.1252
+     ESB  Spanish_Bolivia.1252
+     ESC  Spanish_Costa Rica.1252
+     ESD  Spanish_Dominican Republic.1252
+     ESE  Spanish_El Salvador.1252
+     ESF  Spanish_Ecuador.1252
+     ESG  Spanish_Guatemala.1252
+     ESH  Spanish_Honduras.1252
+     ESI  Spanish_Nicaragua.1252
+     ESL  Spanish_Chile.1252
+     ESM  Spanish_Mexico.1252
+     ESN  Spanish_Spain.1252
+     ESO  Spanish_Colombia.1252
+     ESP  Spanish_Spain.1252
+     ESR  Spanish_Peru.1252
+     ESS  Spanish_Argentina.1252
+     ESU  Spanish_Puerto Rico.1252
+     ESV  Spanish_Venezuela.1252
+     ESY  Spanish_Uruguay.1252
+     ESZ  Spanish_Paraguay.1252
+     ETI  Estonian_Estonia.1257
+     EUQ  Basque_Spain.1252
+     FAR  Farsi_Iran.1256
+     FIN  Finnish_Finland.1252
+     FOS  Faroese_Faroe Islands.1252
+     FPO  Filipino_Philippines.1252
+     FRA  French_France.1252
+     FRB  French_Belgium.1252
+     FRC  French_Canada.1252
+     FRL  French_Luxembourg.1252
+     FRM  French_Principality of Monaco.1252
+     FRS  French_Switzerland.1252
+     FYN  Frisian_Netherlands.1252
+     GLC  Galician_Spain.1252
+     HEB  Hebrew_Israel.1255
+     HRB  Croatian_Bosnia and Herzegovina.1250
+     HRV  Croatian_Croatia.1250
+     HUN  Hungarian_Hungary.1250
+     IND  Indonesian_Indonesia.1252
+     IRE  Irish_Ireland.1252
+     ISL  Icelandic_Iceland.1252
+     ITA  Italian_Italy.1252
+     ITS  Italian_Switzerland.1252
+     IUK  Inuktitut (Latin)_Canada.1252
+     JPN  Japanese_Japan.932
+     KKZ  Kazakh_Kazakhstan.1251
+     KOR  Korean_Korea.949
+     KYR  Kyrgyz_Kyrgyzstan.1251
+     LBX  Luxembourgish_Luxembourg.1252
+     LTH  Lithuanian_Lithuania.1257
+     LVI  Latvian_Latvia.1257
+     MKI  FYRO Macedonian_Former Yugoslav Republic of Macedonia.1251
+     MON  Mongolian_Mongolia.1251
+     MPD  Mapudungun_Chile.1252
+     MSB  Malay_Brunei Darussalam.1252
+     MSL  Malay_Malaysia.1252
+     MWK  Mohawk_Canada.1252
+     NLB  Dutch_Belgium.1252
+     NLD  Dutch_Netherlands.1252
+     NON  Norwegian-Nynorsk_Norway.1252
+     NOR  Norwegian (Bokmål)_Norway.1252
+     NSO  Northern Sotho_South Africa.1252
+     PLK  Polish_Poland.1250
+     PTB  Portuguese_Brazil.1252
+     PTG  Portuguese_Portugal.1252
+     QUB  Quechua_Bolivia.1252
+     QUE  Quechua_Ecuador.1252
+     QUP  Quechua_Peru.1252
+     RMC  Romansh_Switzerland.1252
+     ROM  Romanian_Romania.1250
+     RUS  Russian_Russia.1251
+     SKY  Slovak_Slovakia.1250
+     SLV  Slovenian_Slovenia.1250
+     SMA  Sami (Southern)_Norway.1252
+     SMB  Sami (Southern)_Sweden.1252
+     SME  Sami (Northern)_Norway.1252
+     SMF  Sami (Northern)_Sweden.1252
+     SMG  Sami (Northern)_Finland.1252
+     SMJ  Sami (Lule)_Norway.1252
+     SMK  Sami (Lule)_Sweden.1252
+     SMN  Sami (Inari)_Finland.1252
+     SMS  Sami (Skolt)_Finland.1252
+     SQI  Albanian_Albania.1250
+     SRB  Serbian (Cyrillic)_Serbia and Montenegro.1251
+     SRL  Serbian (Latin)_Serbia and Montenegro.1250
+     SRN  Serbian (Cyrillic)_Bosnia and Herzegovina.1251
+     SRS  Serbian (Latin)_Bosnia and Herzegovina.1250
+     SVE  Swedish_Sweden.1252
+     SVF  Swedish_Finland.1252
+     SWK  Swahili_Kenya.1252
+     THA  Thai_Thailand.874
+     TRK  Turkish_Turkey.1254
+     TSN  Tswana_South Africa.1252
+     TTT  Tatar_Russia.1251
+     UKR  Ukrainian_Ukraine.1251
+     URD  Urdu_Islamic Republic of Pakistan.1256
+     USA  English_United States.1252
+     UZB  Uzbek (Latin)_Uzbekistan.1254
+     VIT  Vietnamese_Viet Nam.1258
+     XHO  Xhosa_South Africa.1252
+     ZHH  Chinese_Hong Kong S.A.R..950
+     ZHI  Chinese_Singapore.936
+     ZHM  Chinese_Macau S.A.R..950
+     ZUL  Zulu_South Africa.1252
+ */
+
+/* Table from ISO 639 language code, optionally with country or script suffix,
+   to English name.
+   Keep in sync with the gl_locale_name_from_win32_LANGID function in
+   localename.c!  */
+struct table_entry
+{
+  const char *code;
+  const char *english;
+};
+static const struct table_entry language_table[] =
+  {
+    { "af", "Afrikaans" },
+    { "am", "Amharic" },
+    { "ar", "Arabic" },
+    { "arn", "Mapudungun" },
+    { "as", "Assamese" },
+    { "az@cyrillic", "Azeri (Cyrillic)" },
+    { "az@latin", "Azeri (Latin)" },
+    { "ba", "Bashkir" },
+    { "be", "Belarusian" },
+    { "ber", "Tamazight" },
+    { "ber@arabic", "Tamazight (Arabic)" },
+    { "ber@latin", "Tamazight (Latin)" },
+    { "bg", "Bulgarian" },
+    { "bin", "Edo" },
+    { "bn", "Bengali" },
+    { "bn_BD", "Bengali (Bangladesh)" },
+    { "bn_IN", "Bengali (India)" },
+    { "bnt", "Sutu" },
+    { "bo", "Tibetan" },
+    { "br", "Breton" },
+    { "bs", "BSB" }, /* "Bosnian (Latin)" */
+    { "bs@cyrillic", "BSC" }, /* Bosnian (Cyrillic) */
+    { "ca", "Catalan" },
+    { "chr", "Cherokee" },
+    { "co", "Corsican" },
+    { "cpe", "Hawaiian" },
+    { "cs", "Czech" },
+    { "cy", "Welsh" },
+    { "da", "Danish" },
+    { "de", "German" },
+    { "dsb", "Lower Sorbian" },
+    { "dv", "Divehi" },
+    { "el", "Greek" },
+    { "en", "English" },
+    { "es", "Spanish" },
+    { "et", "Estonian" },
+    { "eu", "Basque" },
+    { "fa", "Farsi" },
+    { "ff", "Fulfulde" },
+    { "fi", "Finnish" },
+    { "fo", "Faroese" }, /* "Faeroese" does not work */
+    { "fr", "French" },
+    { "fy", "Frisian" },
+    { "ga", "IRE" }, /* Gaelic (Ireland) */
+    { "gd", "Gaelic (Scotland)" },
+    { "gd", "Scottish Gaelic" },
+    { "gl", "Galician" },
+    { "gn", "Guarani" },
+    { "gsw", "Alsatian" },
+    { "gu", "Gujarati" },
+    { "ha", "Hausa" },
+    { "he", "Hebrew" },
+    { "hi", "Hindi" },
+    { "hr", "Croatian" },
+    { "hsb", "Upper Sorbian" },
+    { "hu", "Hungarian" },
+    { "hy", "Armenian" },
+    { "id", "Indonesian" },
+    { "ig", "Igbo" },
+    { "ii", "Yi" },
+    { "is", "Icelandic" },
+    { "it", "Italian" },
+    { "iu", "IUK" }, /* Inuktitut */
+    { "ja", "Japanese" },
+    { "ka", "Georgian" },
+    { "kk", "Kazakh" },
+    { "kl", "Greenlandic" },
+    { "km", "Cambodian" },
+    { "km", "Khmer" },
+    { "kn", "Kannada" },
+    { "ko", "Korean" },
+    { "kok", "Konkani" },
+    { "kr", "Kanuri" },
+    { "ks", "Kashmiri" },
+    { "ks_IN", "Kashmiri_India" },
+    { "ks_PK", "Kashmiri (Arabic)_Pakistan" },
+    { "ky", "Kyrgyz" },
+    { "la", "Latin" },
+    { "lb", "Luxembourgish" },
+    { "lo", "Lao" },
+    { "lt", "Lithuanian" },
+    { "lv", "Latvian" },
+    { "mi", "Maori" },
+    { "mk", "FYRO Macedonian" },
+    { "mk", "Macedonian" },
+    { "ml", "Malayalam" },
+    { "mn", "Mongolian" },
+    { "mni", "Manipuri" },
+    { "moh", "Mohawk" },
+    { "mr", "Marathi" },
+    { "ms", "Malay" },
+    { "mt", "Maltese" },
+    { "my", "Burmese" },
+    { "nb", "NOR" }, /* Norwegian Bokmål */
+    { "ne", "Nepali" },
+    { "nic", "Ibibio" },
+    { "nl", "Dutch" },
+    { "nn", "NON" }, /* Norwegian Nynorsk */
+    { "no", "Norwegian" },
+    { "nso", "Northern Sotho" },
+    { "nso", "Sepedi" },
+    { "oc", "Occitan" },
+    { "om", "Oromo" },
+    { "or", "Oriya" },
+    { "pa", "Punjabi" },
+    { "pap", "Papiamentu" },
+    { "pl", "Polish" },
+    { "prs", "Dari" },
+    { "ps", "Pashto" },
+    { "pt", "Portuguese" },
+    { "qu", "Quechua" },
+    { "qut", "K'iche'" },
+    { "rm", "Romansh" },
+    { "ro", "Romanian" },
+    { "ru", "Russian" },
+    { "rw", "Kinyarwanda" },
+    { "sa", "Sanskrit" },
+    { "sah", "Yakut" },
+    { "sd", "Sindhi" },
+    { "se", "Sami (Northern)" },
+    { "se", "Northern Sami" },
+    { "si", "Sinhalese" },
+    { "sk", "Slovak" },
+    { "sl", "Slovenian" },
+    { "sma", "Sami (Southern)" },
+    { "sma", "Southern Sami" },
+    { "smj", "Sami (Lule)" },
+    { "smj", "Lule Sami" },
+    { "smn", "Sami (Inari)" },
+    { "smn", "Inari Sami" },
+    { "sms", "Sami (Skolt)" },
+    { "sms", "Skolt Sami" },
+    { "so", "Somali" },
+    { "sq", "Albanian" },
+    { "sr", "Serbian (Latin)" },
+    { "sr@cyrillic", "SRB" }, /* Serbian (Cyrillic) */
+    { "sv", "Swedish" },
+    { "sw", "Swahili" },
+    { "syr", "Syriac" },
+    { "ta", "Tamil" },
+    { "te", "Telugu" },
+    { "tg", "Tajik" },
+    { "th", "Thai" },
+    { "ti", "Tigrinya" },
+    { "tk", "Turkmen" },
+    { "tl", "Filipino" },
+    { "tn", "Tswana" },
+    { "tr", "Turkish" },
+    { "ts", "Tsonga" },
+    { "tt", "Tatar" },
+    { "ug", "Uighur" },
+    { "uk", "Ukrainian" },
+    { "ur", "Urdu" },
+    { "uz", "Uzbek" },
+    { "uz", "Uzbek (Latin)" },
+    { "uz@cyrillic", "Uzbek (Cyrillic)" },
+    { "ve", "Venda" },
+    { "vi", "Vietnamese" },
+    { "wen", "Sorbian" },
+    { "wo", "Wolof" },
+    { "xh", "Xhosa" },
+    { "yi", "Yiddish" },
+    { "yo", "Yoruba" },
+    { "zh", "Chinese" },
+    { "zu", "Zulu" }
+  };
+
+/* Table from ISO 3166 country code to English name.
+   Keep in sync with the gl_locale_name_from_win32_LANGID function in
+   localename.c!  */
+static const struct table_entry country_table[] =
+  {
+    { "AE", "U.A.E." },
+    { "AF", "Afghanistan" },
+    { "AL", "Albania" },
+    { "AM", "Armenia" },
+    { "AN", "Netherlands Antilles" },
+    { "AR", "Argentina" },
+    { "AT", "Austria" },
+    { "AU", "Australia" },
+    { "AZ", "Azerbaijan" },
+    { "BA", "Bosnia and Herzegovina" },
+    { "BD", "Bangladesh" },
+    { "BE", "Belgium" },
+    { "BG", "Bulgaria" },
+    { "BH", "Bahrain" },
+    { "BN", "Brunei Darussalam" },
+    { "BO", "Bolivia" },
+    { "BR", "Brazil" },
+    { "BT", "Bhutan" },
+    { "BY", "Belarus" },
+    { "BZ", "Belize" },
+    { "CA", "Canada" },
+    { "CG", "Congo" },
+    { "CH", "Switzerland" },
+    { "CI", "Cote d'Ivoire" },
+    { "CL", "Chile" },
+    { "CM", "Cameroon" },
+    { "CN", "People's Republic of China" },
+    { "CO", "Colombia" },
+    { "CR", "Costa Rica" },
+    { "CS", "Serbia and Montenegro" },
+    { "CZ", "Czech Republic" },
+    { "DE", "Germany" },
+    { "DK", "Denmark" },
+    { "DO", "Dominican Republic" },
+    { "DZ", "Algeria" },
+    { "EC", "Ecuador" },
+    { "EE", "Estonia" },
+    { "EG", "Egypt" },
+    { "ER", "Eritrea" },
+    { "ES", "Spain" },
+    { "ET", "Ethiopia" },
+    { "FI", "Finland" },
+    { "FO", "Faroe Islands" },
+    { "FR", "France" },
+    { "GB", "United Kingdom" },
+    { "GD", "Caribbean" },
+    { "GE", "Georgia" },
+    { "GL", "Greenland" },
+    { "GR", "Greece" },
+    { "GT", "Guatemala" },
+    { "HK", "Hong Kong" },
+    { "HK", "Hong Kong S.A.R." },
+    { "HN", "Honduras" },
+    { "HR", "Croatia" },
+    { "HT", "Haiti" },
+    { "HU", "Hungary" },
+    { "ID", "Indonesia" },
+    { "IE", "Ireland" },
+    { "IL", "Israel" },
+    { "IN", "India" },
+    { "IQ", "Iraq" },
+    { "IR", "Iran" },
+    { "IS", "Iceland" },
+    { "IT", "Italy" },
+    { "JM", "Jamaica" },
+    { "JO", "Jordan" },
+    { "JP", "Japan" },
+    { "KE", "Kenya" },
+    { "KG", "Kyrgyzstan" },
+    { "KH", "Cambodia" },
+    { "KR", "South Korea" },
+    { "KW", "Kuwait" },
+    { "KZ", "Kazakhstan" },
+    { "LA", "Laos" },
+    { "LB", "Lebanon" },
+    { "LI", "Liechtenstein" },
+    { "LK", "Sri Lanka" },
+    { "LT", "Lithuania" },
+    { "LU", "Luxembourg" },
+    { "LV", "Latvia" },
+    { "LY", "Libya" },
+    { "MA", "Morocco" },
+    { "MC", "Principality of Monaco" },
+    { "MD", "Moldava" },
+    { "MD", "Moldova" },
+    { "ME", "Montenegro" },
+    { "MK", "Former Yugoslav Republic of Macedonia" },
+    { "ML", "Mali" },
+    { "MM", "Myanmar" },
+    { "MN", "Mongolia" },
+    { "MO", "Macau S.A.R." },
+    { "MT", "Malta" },
+    { "MV", "Maldives" },
+    { "MX", "Mexico" },
+    { "MY", "Malaysia" },
+    { "NG", "Nigeria" },
+    { "NI", "Nicaragua" },
+    { "NL", "Netherlands" },
+    { "NO", "Norway" },
+    { "NP", "Nepal" },
+    { "NZ", "New Zealand" },
+    { "OM", "Oman" },
+    { "PA", "Panama" },
+    { "PE", "Peru" },
+    { "PH", "Philippines" },
+    { "PK", "Islamic Republic of Pakistan" },
+    { "PL", "Poland" },
+    { "PR", "Puerto Rico" },
+    { "PT", "Portugal" },
+    { "PY", "Paraguay" },
+    { "QA", "Qatar" },
+    { "RE", "Reunion" },
+    { "RO", "Romania" },
+    { "RS", "Serbia" },
+    { "RU", "Russia" },
+    { "RW", "Rwanda" },
+    { "SA", "Saudi Arabia" },
+    { "SE", "Sweden" },
+    { "SG", "Singapore" },
+    { "SI", "Slovenia" },
+    { "SK", "Slovak" },
+    { "SN", "Senegal" },
+    { "SO", "Somalia" },
+    { "SR", "Suriname" },
+    { "SV", "El Salvador" },
+    { "SY", "Syria" },
+    { "TH", "Thailand" },
+    { "TJ", "Tajikistan" },
+    { "TM", "Turkmenistan" },
+    { "TN", "Tunisia" },
+    { "TR", "Turkey" },
+    { "TT", "Trinidad and Tobago" },
+    { "TW", "Taiwan" },
+    { "TZ", "Tanzania" },
+    { "UA", "Ukraine" },
+    { "US", "United States" },
+    { "UY", "Uruguay" },
+    { "VA", "Vatican" },
+    { "VE", "Venezuela" },
+    { "VN", "Viet Nam" },
+    { "YE", "Yemen" },
+    { "ZA", "South Africa" },
+    { "ZW", "Zimbabwe" }
+  };
+
+/* Given a string STRING, find the set of indices i such that TABLE[i].code is
+   the given STRING.  It is a range [lo,hi-1].  */
+typedef struct { size_t lo; size_t hi; } range_t;
+static void
+search (const struct table_entry *table, size_t table_size, const char *string,
+        range_t *result)
+{
+  /* The table is sorted.  Perform a binary search.  */
+  size_t hi = table_size;
+  size_t lo = 0;
+  while (lo < hi)
+    {
+      /* Invariant:
+         for i < lo, strcmp (table[i].code, string) < 0,
+         for i >= hi, strcmp (table[i].code, string) > 0.  */
+      size_t mid = (hi + lo) >> 1; /* >= lo, < hi */
+      int cmp = strcmp (table[mid].code, string);
+      if (cmp < 0)
+        lo = mid + 1;
+      else if (cmp > 0)
+        hi = mid;
+      else
+        {
+          /* Found an i with
+               strcmp (language_table[i].code, string) == 0.
+             Find the entire interval of such i.  */
+          {
+            size_t i;
+
+            for (i = mid; i > lo; )
+              {
+                i--;
+                if (strcmp (table[i].code, string) < 0)
+                  {
+                    lo = i + 1;
+                    break;
+                  }
+              }
+          }
+          {
+            size_t i;
+
+            for (i = mid + 1; i < hi; i++)
+              {
+                if (strcmp (table[i].code, string) > 0)
+                  {
+                    hi = i;
+                    break;
+                  }
+              }
+          }
+          /* The set of i with
+               strcmp (language_table[i].code, string) == 0
+             is the interval [lo, hi-1].  */
+          break;
+        }
+    }
+  result->lo = lo;
+  result->hi = hi;
+}
+
+/* Like setlocale, but accept also locale names in the form ll or ll_CC,
+   where ll is an ISO 639 language code and CC is an ISO 3166 country code.  */
+static char *
+setlocale_unixlike (int category, const char *locale)
+{
+  char *result;
+  char llCC_buf[64];
+  char ll_buf[64];
+  char CC_buf[64];
+
+  /* The native Windows implementation of setlocale understands the special
+     locale name "C", but not "POSIX".  Therefore map "POSIX" to "C".  */
+  if (locale != NULL && strcmp (locale, "POSIX") == 0)
+    locale = "C";
+
+  /* First, try setlocale with the original argument unchanged.  */
+  result = setlocale_mtsafe (category, locale);
+  if (result != NULL)
+    return result;
+
+  /* Otherwise, assume the argument is in the form
+       language[_territory][.codeset][@modifier]
+     and try to map it using the tables.  */
+  if (strlen (locale) < sizeof (llCC_buf))
+    {
+      /* Second try: Remove the codeset part.  */
+      {
+        const char *p = locale;
+        char *q = llCC_buf;
+
+        /* Copy the part before the dot.  */
+        for (; *p != '\0' && *p != '.'; p++, q++)
+          *q = *p;
+        if (*p == '.')
+          /* Skip the part up to the '@', if any.  */
+          for (; *p != '\0' && *p != '@'; p++)
+            ;
+        /* Copy the part starting with '@', if any.  */
+        for (; *p != '\0'; p++, q++)
+          *q = *p;
+        *q = '\0';
+      }
+      /* llCC_buf now contains
+           language[_territory][@modifier]
+       */
+      if (strcmp (llCC_buf, locale) != 0)
+        {
+          result = setlocale (category, llCC_buf);
+          if (result != NULL)
+            return result;
+        }
+      /* Look it up in language_table.  */
+      {
+        range_t range;
+        size_t i;
+
+        search (language_table,
+                sizeof (language_table) / sizeof (language_table[0]),
+                llCC_buf,
+                &range);
+
+        for (i = range.lo; i < range.hi; i++)
+          {
+            /* Try the replacement in language_table[i].  */
+            result = setlocale (category, language_table[i].english);
+            if (result != NULL)
+              return result;
+          }
+      }
+      /* Split language[_territory][@modifier]
+         into  ll_buf = language[@modifier]
+         and   CC_buf = territory
+       */
+      {
+        const char *underscore = strchr (llCC_buf, '_');
+        if (underscore != NULL)
+          {
+            const char *territory_start = underscore + 1;
+            const char *territory_end = strchr (territory_start, '@');
+            if (territory_end == NULL)
+              territory_end = territory_start + strlen (territory_start);
+
+            memcpy (ll_buf, llCC_buf, underscore - llCC_buf);
+            strcpy (ll_buf + (underscore - llCC_buf), territory_end);
+
+            memcpy (CC_buf, territory_start, territory_end - territory_start);
+            CC_buf[territory_end - territory_start] = '\0';
+
+            {
+              /* Look up ll_buf in language_table
+                 and CC_buf in country_table.  */
+              range_t language_range;
+
+              search (language_table,
+                      sizeof (language_table) / sizeof (language_table[0]),
+                      ll_buf,
+                      &language_range);
+              if (language_range.lo < language_range.hi)
+                {
+                  range_t country_range;
+
+                  search (country_table,
+                          sizeof (country_table) / sizeof (country_table[0]),
+                          CC_buf,
+                          &country_range);
+                  if (country_range.lo < country_range.hi)
+                    {
+                      size_t i;
+                      size_t j;
+
+                      for (i = language_range.lo; i < language_range.hi; i++)
+                        for (j = country_range.lo; j < country_range.hi; j++)
+                          {
+                            /* Concatenate the replacements.  */
+                            const char *part1 = language_table[i].english;
+                            size_t part1_len = strlen (part1);
+                            const char *part2 = country_table[j].english;
+                            size_t part2_len = strlen (part2) + 1;
+                            char buf[64+64];
+
+                            if (!(part1_len + 1 + part2_len <= sizeof (buf)))
+                              abort ();
+                            memcpy (buf, part1, part1_len);
+                            buf[part1_len] = '_';
+                            memcpy (buf + part1_len + 1, part2, part2_len);
+
+                            /* Try the concatenated replacements.  */
+                            result = setlocale (category, buf);
+                            if (result != NULL)
+                              return result;
+                          }
+                    }
+
+                  /* Try omitting the country entirely.  This may set a locale
+                     corresponding to the wrong country, but is better than
+                     failing entirely.  */
+                  {
+                    size_t i;
+
+                    for (i = language_range.lo; i < language_range.hi; i++)
+                      {
+                        /* Try only the language replacement.  */
+                        result =
+                          setlocale (category, language_table[i].english);
+                        if (result != NULL)
+                          return result;
+                      }
+                  }
+                }
+            }
+          }
+      }
+    }
+
+  /* Failed.  */
+  return NULL;
+}
+
+#  elif defined __ANDROID__
+
+/* Like setlocale, but accept also the locale names "C" and "POSIX".  */
+static char *
+setlocale_unixlike (int category, const char *locale)
+{
+  char *result = setlocale_mtsafe (category, locale);
+  if (result == NULL)
+    switch (category)
+      {
+      case LC_CTYPE:
+      case LC_NUMERIC:
+      case LC_TIME:
+      case LC_COLLATE:
+      case LC_MONETARY:
+      case LC_MESSAGES:
+      case LC_ALL:
+      case LC_PAPER:
+      case LC_NAME:
+      case LC_ADDRESS:
+      case LC_TELEPHONE:
+      case LC_MEASUREMENT:
+        if (locale == NULL
+            || strcmp (locale, "C") == 0 || strcmp (locale, "POSIX") == 0)
+          result = (char *) "C";
+        break;
+      default:
+        break;
+      }
+  return result;
+}
+#   define setlocale setlocale_unixlike
+
+#  else
+#   define setlocale_unixlike setlocale_mtsafe
+#  endif
+
+#  if LC_MESSAGES == 1729
+
+/* The system does not store an LC_MESSAGES locale category.  Do it here.  */
+static char lc_messages_name[64] = "C";
+
+/* Like setlocale, but support also LC_MESSAGES.  */
+static char *
+setlocale_single (int category, const char *locale)
+{
+  if (category == LC_MESSAGES)
+    {
+      if (locale != NULL)
+        {
+          lc_messages_name[sizeof (lc_messages_name) - 1] = '\0';
+          strncpy (lc_messages_name, locale, sizeof (lc_messages_name) - 1);
+        }
+      return lc_messages_name;
+    }
+  else
+    return setlocale_unixlike (category, locale);
+}
+
+#  else
+#   define setlocale_single setlocale_unixlike
+#  endif
+
+#  if defined __APPLE__ && defined __MACH__
+
+/* Mapping from language to main territory where that language is spoken.  */
+static char const locales_with_principal_territory[][6 + 1] =
+  {
+                /* Language     Main territory */
+    "ace_ID",   /* Achinese     Indonesia */
+    "af_ZA",    /* Afrikaans    South Africa */
+    "ak_GH",    /* Akan         Ghana */
+    "am_ET",    /* Amharic      Ethiopia */
+    "an_ES",    /* Aragonese    Spain */
+    "ang_GB",   /* Old English  Britain */
+    "arn_CL",   /* Mapudungun   Chile */
+    "as_IN",    /* Assamese     India */
+    "ast_ES",   /* Asturian     Spain */
+    "av_RU",    /* Avaric       Russia */
+    "awa_IN",   /* Awadhi       India */
+    "az_AZ",    /* Azerbaijani  Azerbaijan */
+    "ban_ID",   /* Balinese     Indonesia */
+    "be_BY",    /* Belarusian   Belarus */
+    "bej_SD",   /* Beja         Sudan */
+    "bem_ZM",   /* Bemba        Zambia */
+    "bg_BG",    /* Bulgarian    Bulgaria */
+    "bho_IN",   /* Bhojpuri     India */
+    "bi_VU",    /* Bislama      Vanuatu */
+    "bik_PH",   /* Bikol        Philippines */
+    "bin_NG",   /* Bini         Nigeria */
+    "bm_ML",    /* Bambara      Mali */
+    "bn_IN",    /* Bengali      India */
+    "bo_CN",    /* Tibetan      China */
+    "br_FR",    /* Breton       France */
+    "bs_BA",    /* Bosnian      Bosnia */
+    "bug_ID",   /* Buginese     Indonesia */
+    "ca_ES",    /* Catalan      Spain */
+    "ce_RU",    /* Chechen      Russia */
+    "ceb_PH",   /* Cebuano      Philippines */
+    "co_FR",    /* Corsican     France */
+    "cr_CA",    /* Cree         Canada */
+    /* Don't put "crh_UZ" or "crh_UA" here.  That would be asking for fruitless
+       political discussion.  */
+    "cs_CZ",    /* Czech        Czech Republic */
+    "csb_PL",   /* Kashubian    Poland */
+    "cy_GB",    /* Welsh        Britain */
+    "da_DK",    /* Danish       Denmark */
+    "de_DE",    /* German       Germany */
+    "din_SD",   /* Dinka        Sudan */
+    "doi_IN",   /* Dogri        India */
+    "dsb_DE",   /* Lower Sorbian        Germany */
+    "dv_MV",    /* Divehi       Maldives */
+    "dz_BT",    /* Dzongkha     Bhutan */
+    "ee_GH",    /* Éwé          Ghana */
+    "el_GR",    /* Greek        Greece */
+    /* Don't put "en_GB" or "en_US" here.  That would be asking for fruitless
+       political discussion.  */
+    "es_ES",    /* Spanish      Spain */
+    "et_EE",    /* Estonian     Estonia */
+    "fa_IR",    /* Persian      Iran */
+    "fi_FI",    /* Finnish      Finland */
+    "fil_PH",   /* Filipino     Philippines */
+    "fj_FJ",    /* Fijian       Fiji */
+    "fo_FO",    /* Faroese      Faeroe Islands */
+    "fon_BJ",   /* Fon          Benin */
+    "fr_FR",    /* French       France */
+    "fur_IT",   /* Friulian     Italy */
+    "fy_NL",    /* Western Frisian      Netherlands */
+    "ga_IE",    /* Irish        Ireland */
+    "gd_GB",    /* Scottish Gaelic      Britain */
+    "gon_IN",   /* Gondi        India */
+    "gsw_CH",   /* Swiss German Switzerland */
+    "gu_IN",    /* Gujarati     India */
+    "he_IL",    /* Hebrew       Israel */
+    "hi_IN",    /* Hindi        India */
+    "hil_PH",   /* Hiligaynon   Philippines */
+    "hr_HR",    /* Croatian     Croatia */
+    "hsb_DE",   /* Upper Sorbian        Germany */
+    "ht_HT",    /* Haitian      Haiti */
+    "hu_HU",    /* Hungarian    Hungary */
+    "hy_AM",    /* Armenian     Armenia */
+    "id_ID",    /* Indonesian   Indonesia */
+    "ig_NG",    /* Igbo         Nigeria */
+    "ii_CN",    /* Sichuan Yi   China */
+    "ilo_PH",   /* Iloko        Philippines */
+    "is_IS",    /* Icelandic    Iceland */
+    "it_IT",    /* Italian      Italy */
+    "ja_JP",    /* Japanese     Japan */
+    "jab_NG",   /* Hyam         Nigeria */
+    "jv_ID",    /* Javanese     Indonesia */
+    "ka_GE",    /* Georgian     Georgia */
+    "kab_DZ",   /* Kabyle       Algeria */
+    "kaj_NG",   /* Jju          Nigeria */
+    "kam_KE",   /* Kamba        Kenya */
+    "kmb_AO",   /* Kimbundu     Angola */
+    "kcg_NG",   /* Tyap         Nigeria */
+    "kdm_NG",   /* Kagoma       Nigeria */
+    "kg_CD",    /* Kongo        Democratic Republic of Congo */
+    "kk_KZ",    /* Kazakh       Kazakhstan */
+    "kl_GL",    /* Kalaallisut  Greenland */
+    "km_KH",    /* Central Khmer        Cambodia */
+    "kn_IN",    /* Kannada      India */
+    "ko_KR",    /* Korean       Korea (South) */
+    "kok_IN",   /* Konkani      India */
+    "kr_NG",    /* Kanuri       Nigeria */
+    "kru_IN",   /* Kurukh       India */
+    "ky_KG",    /* Kyrgyz       Kyrgyzstan */
+    "lg_UG",    /* Ganda        Uganda */
+    "li_BE",    /* Limburgish   Belgium */
+    "lo_LA",    /* Laotian      Laos */
+    "lt_LT",    /* Lithuanian   Lithuania */
+    "lu_CD",    /* Luba-Katanga Democratic Republic of Congo */
+    "lua_CD",   /* Luba-Lulua   Democratic Republic of Congo */
+    "luo_KE",   /* Luo          Kenya */
+    "lv_LV",    /* Latvian      Latvia */
+    "mad_ID",   /* Madurese     Indonesia */
+    "mag_IN",   /* Magahi       India */
+    "mai_IN",   /* Maithili     India */
+    "mak_ID",   /* Makasar      Indonesia */
+    "man_ML",   /* Mandingo     Mali */
+    "men_SL",   /* Mende        Sierra Leone */
+    "mfe_MU",   /* Mauritian Creole     Mauritius */
+    "mg_MG",    /* Malagasy     Madagascar */
+    "mi_NZ",    /* Maori        New Zealand */
+    "min_ID",   /* Minangkabau  Indonesia */
+    "mk_MK",    /* Macedonian   North Macedonia */
+    "ml_IN",    /* Malayalam    India */
+    "mn_MN",    /* Mongolian    Mongolia */
+    "mni_IN",   /* Manipuri     India */
+    "mos_BF",   /* Mossi        Burkina Faso */
+    "mr_IN",    /* Marathi      India */
+    "ms_MY",    /* Malay        Malaysia */
+    "mt_MT",    /* Maltese      Malta */
+    "mwr_IN",   /* Marwari      India */
+    "my_MM",    /* Burmese      Myanmar */
+    "na_NR",    /* Nauru        Nauru */
+    "nah_MX",   /* Nahuatl      Mexico */
+    "nap_IT",   /* Neapolitan   Italy */
+    "nb_NO",    /* Norwegian Bokmål    Norway */
+    "nds_DE",   /* Low Saxon    Germany */
+    "ne_NP",    /* Nepali       Nepal */
+    "nl_NL",    /* Dutch        Netherlands */
+    "nn_NO",    /* Norwegian Nynorsk    Norway */
+    "no_NO",    /* Norwegian    Norway */
+    "nr_ZA",    /* South Ndebele        South Africa */
+    "nso_ZA",   /* Northern Sotho       South Africa */
+    "ny_MW",    /* Chichewa     Malawi */
+    "nym_TZ",   /* Nyamwezi     Tanzania */
+    "nyn_UG",   /* Nyankole     Uganda */
+    "oc_FR",    /* Occitan      France */
+    "oj_CA",    /* Ojibwa       Canada */
+    "or_IN",    /* Oriya        India */
+    "pa_IN",    /* Punjabi      India */
+    "pag_PH",   /* Pangasinan   Philippines */
+    "pam_PH",   /* Pampanga     Philippines */
+    "pap_AN",   /* Papiamento   Netherlands Antilles - this line can be removed in 2018 */
+    "pbb_CO",   /* Páez         Colombia */
+    "pl_PL",    /* Polish       Poland */
+    "ps_AF",    /* Pashto       Afghanistan */
+    "pt_PT",    /* Portuguese   Portugal */
+    "raj_IN",   /* Rajasthani   India */
+    "rm_CH",    /* Romansh      Switzerland */
+    "rn_BI",    /* Kirundi      Burundi */
+    "ro_RO",    /* Romanian     Romania */
+    "ru_RU",    /* Russian      Russia */
+    "rw_RW",    /* Kinyarwanda  Rwanda */
+    "sa_IN",    /* Sanskrit     India */
+    "sah_RU",   /* Yakut        Russia */
+    "sas_ID",   /* Sasak        Indonesia */
+    "sat_IN",   /* Santali      India */
+    "sc_IT",    /* Sardinian    Italy */
+    "scn_IT",   /* Sicilian     Italy */
+    "sg_CF",    /* Sango        Central African Republic */
+    "shn_MM",   /* Shan         Myanmar */
+    "si_LK",    /* Sinhala      Sri Lanka */
+    "sid_ET",   /* Sidamo       Ethiopia */
+    "sk_SK",    /* Slovak       Slovakia */
+    "sl_SI",    /* Slovenian    Slovenia */
+    "sm_WS",    /* Samoan       Samoa */
+    "smn_FI",   /* Inari Sami   Finland */
+    "sms_FI",   /* Skolt Sami   Finland */
+    "so_SO",    /* Somali       Somalia */
+    "sq_AL",    /* Albanian     Albania */
+    "sr_RS",    /* Serbian      Serbia */
+    "srr_SN",   /* Serer        Senegal */
+    "suk_TZ",   /* Sukuma       Tanzania */
+    "sus_GN",   /* Susu         Guinea */
+    "sv_SE",    /* Swedish      Sweden */
+    "te_IN",    /* Telugu       India */
+    "tem_SL",   /* Timne        Sierra Leone */
+    "tet_ID",   /* Tetum        Indonesia */
+    "tg_TJ",    /* Tajik        Tajikistan */
+    "th_TH",    /* Thai         Thailand */
+    "ti_ER",    /* Tigrinya     Eritrea */
+    "tiv_NG",   /* Tiv          Nigeria */
+    "tk_TM",    /* Turkmen      Turkmenistan */
+    "tl_PH",    /* Tagalog      Philippines */
+    "to_TO",    /* Tonga        Tonga */
+    "tpi_PG",   /* Tok Pisin    Papua New Guinea */
+    "tr_TR",    /* Turkish      Turkey */
+    "tum_MW",   /* Tumbuka      Malawi */
+    "ug_CN",    /* Uighur       China */
+    "uk_UA",    /* Ukrainian    Ukraine */
+    "umb_AO",   /* Umbundu      Angola */
+    "ur_PK",    /* Urdu         Pakistan */
+    "uz_UZ",    /* Uzbek        Uzbekistan */
+    "ve_ZA",    /* Venda        South Africa */
+    "vi_VN",    /* Vietnamese   Vietnam */
+    "wa_BE",    /* Walloon      Belgium */
+    "wal_ET",   /* Walamo       Ethiopia */
+    "war_PH",   /* Waray        Philippines */
+    "wen_DE",   /* Sorbian      Germany */
+    "yao_MW",   /* Yao          Malawi */
+    "zap_MX"    /* Zapotec      Mexico */
+  };
+
+/* Compare just the language part of two locale names.  */
+static int
+langcmp (const char *locale1, const char *locale2)
+{
+  size_t locale1_len;
+  size_t locale2_len;
+  int cmp;
+
+  {
+    const char *locale1_end = strchr (locale1, '_');
+    if (locale1_end != NULL)
+      locale1_len = locale1_end - locale1;
+    else
+      locale1_len = strlen (locale1);
+  }
+  {
+    const char *locale2_end = strchr (locale2, '_');
+    if (locale2_end != NULL)
+      locale2_len = locale2_end - locale2;
+    else
+      locale2_len = strlen (locale2);
+  }
+
+  if (locale1_len < locale2_len)
+    {
+      cmp = memcmp (locale1, locale2, locale1_len);
+      if (cmp == 0)
+        cmp = -1;
+    }
+  else
+    {
+      cmp = memcmp (locale1, locale2, locale2_len);
+      if (locale1_len > locale2_len && cmp == 0)
+        cmp = 1;
+    }
+
+  return cmp;
+}
+
+/* Given a locale name, return the main locale with the same language,
+   or NULL if not found.
+   For example: "fr_DE" -> "fr_FR".  */
+static const char *
+get_main_locale_with_same_language (const char *locale)
+{
+#   define table locales_with_principal_territory
+  /* The table is sorted.  Perform a binary search.  */
+  size_t hi = sizeof (table) / sizeof (table[0]);
+  size_t lo = 0;
+  while (lo < hi)
+    {
+      /* Invariant:
+         for i < lo, langcmp (table[i], locale) < 0,
+         for i >= hi, langcmp (table[i], locale) > 0.  */
+      size_t mid = (hi + lo) >> 1; /* >= lo, < hi */
+      int cmp = langcmp (table[mid], locale);
+      if (cmp < 0)
+        lo = mid + 1;
+      else if (cmp > 0)
+        hi = mid;
+      else
+        {
+          /* Found an i with
+               langcmp (language_table[i], locale) == 0.
+             Verify that it is the only such i.  */
+          if (mid > lo && langcmp (table[mid - 1], locale) >= 0)
+            abort ();
+          if (mid + 1 < hi && langcmp (table[mid + 1], locale) <= 0)
+            abort ();
+          return table[mid];
+        }
+    }
+#   undef table
+  return NULL;
+}
+
+/* Mapping from territory to main language that is spoken in that territory.  */
+static char const locales_with_principal_language[][6 + 1] =
+  {
+    /* This is based on the set of existing locales in glibc, with duplicates
+       removed, and on the Wikipedia pages named "Languages of <territory>".
+       If in doubt, use the locale that exists in macOS.  For example, the only
+       "*_IN" locale in macOS 10.13 is "hi_IN", so use that.  */
+    /* A useful shell function for producing a line of this table is:
+         func_line ()
+         {
+           # Usage: func_line ll_CC
+           ll=`echo "$1" | sed -e 's|_.*||'`
+           cc=`echo "$1" | sed -e 's|^.*_||'`
+           llx=`sed -n -e "s|^${ll} ||p" < gettext-tools/doc/ISO_639`
+           ccx=`expand gettext-tools/doc/ISO_3166 | sed -n -e "s|^${cc}  *||p"`
+           echo "    \"$1\",    /$X* ${llx} ${ccx} *$X/"
+         }
+     */
+              /* Main language  Territory */
+    "ca_AD",    /* Catalan      Andorra */
+    "ar_AE",    /* Arabic       United Arab Emirates */
+    "ps_AF",    /* Pashto       Afghanistan */
+    "en_AG",    /* English      Antigua and Barbuda */
+    "sq_AL",    /* Albanian     Albania */
+    "hy_AM",    /* Armenian     Armenia */
+    "pap_AN",   /* Papiamento   Netherlands Antilles - this line can be removed in 2018 */
+    "pt_AO",    /* Portuguese   Angola */
+    "es_AR",    /* Spanish      Argentina */
+    "de_AT",    /* German       Austria */
+    "en_AU",    /* English      Australia */
+    /* Aruba has two official languages: "nl_AW", "pap_AW".  */
+    "az_AZ",    /* Azerbaijani  Azerbaijan */
+    "bs_BA",    /* Bosnian      Bosnia */
+    "bn_BD",    /* Bengali      Bangladesh */
+    "nl_BE",    /* Dutch        Belgium */
+    "fr_BF",    /* French       Burkina Faso */
+    "bg_BG",    /* Bulgarian    Bulgaria */
+    "ar_BH",    /* Arabic       Bahrain */
+    "rn_BI",    /* Kirundi      Burundi */
+    "fr_BJ",    /* French       Benin */
+    "es_BO",    /* Spanish      Bolivia */
+    "pt_BR",    /* Portuguese   Brazil */
+    "dz_BT",    /* Dzongkha     Bhutan */
+    "en_BW",    /* English      Botswana */
+    "be_BY",    /* Belarusian   Belarus */
+    "en_CA",    /* English      Canada */
+    "fr_CD",    /* French       Democratic Republic of Congo */
+    "sg_CF",    /* Sango        Central African Republic */
+    "de_CH",    /* German       Switzerland */
+    "es_CL",    /* Spanish      Chile */
+    "zh_CN",    /* Chinese      China */
+    "es_CO",    /* Spanish      Colombia */
+    "es_CR",    /* Spanish      Costa Rica */
+    "es_CU",    /* Spanish      Cuba */
+    /* Curaçao has three official languages: "nl_CW", "pap_CW", "en_CW".  */
+    "el_CY",    /* Greek        Cyprus */
+    "cs_CZ",    /* Czech        Czech Republic */
+    "de_DE",    /* German       Germany */
+    /* Djibouti has two official languages: "ar_DJ" and "fr_DJ".  */
+    "da_DK",    /* Danish       Denmark */
+    "es_DO",    /* Spanish      Dominican Republic */
+    "ar_DZ",    /* Arabic       Algeria */
+    "es_EC",    /* Spanish      Ecuador */
+    "et_EE",    /* Estonian     Estonia */
+    "ar_EG",    /* Arabic       Egypt */
+    "ti_ER",    /* Tigrinya     Eritrea */
+    "es_ES",    /* Spanish      Spain */
+    "am_ET",    /* Amharic      Ethiopia */
+    "fi_FI",    /* Finnish      Finland */
+    /* Fiji has three official languages: "en_FJ", "fj_FJ", "hif_FJ".  */
+    "fo_FO",    /* Faroese      Faeroe Islands */
+    "fr_FR",    /* French       France */
+    "en_GB",    /* English      Britain */
+    "ka_GE",    /* Georgian     Georgia */
+    "en_GH",    /* English      Ghana */
+    "kl_GL",    /* Kalaallisut  Greenland */
+    "fr_GN",    /* French       Guinea */
+    "el_GR",    /* Greek        Greece */
+    "es_GT",    /* Spanish      Guatemala */
+    "zh_HK",    /* Chinese      Hong Kong */
+    "es_HN",    /* Spanish      Honduras */
+    "hr_HR",    /* Croatian     Croatia */
+    "ht_HT",    /* Haitian      Haiti */
+    "hu_HU",    /* Hungarian    Hungary */
+    "id_ID",    /* Indonesian   Indonesia */
+    "en_IE",    /* English      Ireland */
+    "he_IL",    /* Hebrew       Israel */
+    "hi_IN",    /* Hindi        India */
+    "ar_IQ",    /* Arabic       Iraq */
+    "fa_IR",    /* Persian      Iran */
+    "is_IS",    /* Icelandic    Iceland */
+    "it_IT",    /* Italian      Italy */
+    "ar_JO",    /* Arabic       Jordan */
+    "ja_JP",    /* Japanese     Japan */
+    "sw_KE",    /* Swahili      Kenya */
+    "ky_KG",    /* Kyrgyz       Kyrgyzstan */
+    "km_KH",    /* Central Khmer        Cambodia */
+    "ko_KR",    /* Korean       Korea (South) */
+    "ar_KW",    /* Arabic       Kuwait */
+    "kk_KZ",    /* Kazakh       Kazakhstan */
+    "lo_LA",    /* Laotian      Laos */
+    "ar_LB",    /* Arabic       Lebanon */
+    "de_LI",    /* German       Liechtenstein */
+    "si_LK",    /* Sinhala      Sri Lanka */
+    "lt_LT",    /* Lithuanian   Lithuania */
+    /* Luxembourg has three official languages: "lb_LU", "fr_LU", "de_LU".  */
+    "lv_LV",    /* Latvian      Latvia */
+    "ar_LY",    /* Arabic       Libya */
+    "ar_MA",    /* Arabic       Morocco */
+    "sr_ME",    /* Serbian      Montenegro */
+    "mg_MG",    /* Malagasy     Madagascar */
+    "mk_MK",    /* Macedonian   North Macedonia */
+    "fr_ML",    /* French       Mali */
+    "my_MM",    /* Burmese      Myanmar */
+    "mn_MN",    /* Mongolian    Mongolia */
+    "mt_MT",    /* Maltese      Malta */
+    "mfe_MU",   /* Mauritian Creole     Mauritius */
+    "dv_MV",    /* Divehi       Maldives */
+    "ny_MW",    /* Chichewa     Malawi */
+    "es_MX",    /* Spanish      Mexico */
+    "ms_MY",    /* Malay        Malaysia */
+    "en_NG",    /* English      Nigeria */
+    "es_NI",    /* Spanish      Nicaragua */
+    "nl_NL",    /* Dutch        Netherlands */
+    "no_NO",    /* Norwegian    Norway */
+    "ne_NP",    /* Nepali       Nepal */
+    "na_NR",    /* Nauru        Nauru */
+    "niu_NU",   /* Niuean       Niue */
+    "en_NZ",    /* English      New Zealand */
+    "ar_OM",    /* Arabic       Oman */
+    "es_PA",    /* Spanish      Panama */
+    "es_PE",    /* Spanish      Peru */
+    "tpi_PG",   /* Tok Pisin    Papua New Guinea */
+    "fil_PH",   /* Filipino     Philippines */
+    "pa_PK",    /* Punjabi      Pakistan */
+    "pl_PL",    /* Polish       Poland */
+    "es_PR",    /* Spanish      Puerto Rico */
+    "pt_PT",    /* Portuguese   Portugal */
+    "es_PY",    /* Spanish      Paraguay */
+    "ar_QA",    /* Arabic       Qatar */
+    "ro_RO",    /* Romanian     Romania */
+    "sr_RS",    /* Serbian      Serbia */
+    "ru_RU",    /* Russian      Russia */
+    "rw_RW",    /* Kinyarwanda  Rwanda */
+    "ar_SA",    /* Arabic       Saudi Arabia */
+    "en_SC",    /* English      Seychelles */
+    "ar_SD",    /* Arabic       Sudan */
+    "sv_SE",    /* Swedish      Sweden */
+    "en_SG",    /* English      Singapore */
+    "sl_SI",    /* Slovenian    Slovenia */
+    "sk_SK",    /* Slovak       Slovakia */
+    "en_SL",    /* English      Sierra Leone */
+    "fr_SN",    /* French       Senegal */
+    "so_SO",    /* Somali       Somalia */
+    "ar_SS",    /* Arabic       South Sudan */
+    "es_SV",    /* Spanish      El Salvador */
+    "ar_SY",    /* Arabic       Syria */
+    "th_TH",    /* Thai         Thailand */
+    "tg_TJ",    /* Tajik        Tajikistan */
+    "tk_TM",    /* Turkmen      Turkmenistan */
+    "ar_TN",    /* Arabic       Tunisia */
+    "to_TO",    /* Tonga        Tonga */
+    "tr_TR",    /* Turkish      Turkey */
+    "zh_TW",    /* Chinese      Taiwan */
+    "sw_TZ",    /* Swahili      Tanzania */
+    "uk_UA",    /* Ukrainian    Ukraine */
+    "lg_UG",    /* Ganda        Uganda */
+    "en_US",    /* English      United States of America */
+    "es_UY",    /* Spanish      Uruguay */
+    "uz_UZ",    /* Uzbek        Uzbekistan */
+    "es_VE",    /* Spanish      Venezuela */
+    "vi_VN",    /* Vietnamese   Vietnam */
+    "bi_VU",    /* Bislama      Vanuatu */
+    "sm_WS",    /* Samoan       Samoa */
+    "ar_YE",    /* Arabic       Yemen */
+    "en_ZA",    /* English      South Africa */
+    "en_ZM",    /* English      Zambia */
+    "en_ZW"     /* English      Zimbabwe */
+  };
+
+/* Compare just the territory part of two locale names.  */
+static int
+terrcmp (const char *locale1, const char *locale2)
+{
+  const char *territory1 = strrchr (locale1, '_') + 1;
+  const char *territory2 = strrchr (locale2, '_') + 1;
+
+  return strcmp (territory1, territory2);
+}
+
+/* Given a locale name, return the locale corresponding to the main language
+   with the same territory, or NULL if not found.
+   For example: "fr_DE" -> "de_DE".  */
+static const char *
+get_main_locale_with_same_territory (const char *locale)
+{
+  if (strrchr (locale, '_') != NULL)
+    {
+#   define table locales_with_principal_language
+      /* The table is sorted.  Perform a binary search.  */
+      size_t hi = sizeof (table) / sizeof (table[0]);
+      size_t lo = 0;
+      while (lo < hi)
+        {
+          /* Invariant:
+             for i < lo, terrcmp (table[i], locale) < 0,
+             for i >= hi, terrcmp (table[i], locale) > 0.  */
+          size_t mid = (hi + lo) >> 1; /* >= lo, < hi */
+          int cmp = terrcmp (table[mid], locale);
+          if (cmp < 0)
+            lo = mid + 1;
+          else if (cmp > 0)
+            hi = mid;
+          else
+            {
+              /* Found an i with
+                   terrcmp (language_table[i], locale) == 0.
+                 Verify that it is the only such i.  */
+              if (mid > lo && terrcmp (table[mid - 1], locale) >= 0)
+                abort ();
+              if (mid + 1 < hi && terrcmp (table[mid + 1], locale) <= 0)
+                abort ();
+              return table[mid];
+            }
+        }
+#   undef table
+    }
+  return NULL;
+}
+
+#  endif
+
+char *
+setlocale_improved (int category, const char *locale)
+{
+  if (locale != NULL && locale[0] == '\0')
+    {
+      /* A request to the set the current locale to the default locale.  */
+      if (category == LC_ALL)
+        {
+          /* Set LC_CTYPE first.  Then the other categories.  */
+          static int const categories[] =
+            {
+              LC_CTYPE,
+              LC_NUMERIC,
+              LC_TIME,
+              LC_COLLATE,
+              LC_MONETARY,
+              LC_MESSAGES
+            };
+          char *saved_locale;
+          const char *base_name;
+          unsigned int i;
+
+          /* Back up the old locale, in case one of the steps fails.  */
+          saved_locale = setlocale (LC_ALL, NULL);
+          if (saved_locale == NULL)
+            return NULL;
+          saved_locale = strdup (saved_locale);
+          if (saved_locale == NULL)
+            return NULL;
+
+          /* Set LC_CTYPE category.  Set all other categories (except possibly
+             LC_MESSAGES) to the same value in the same call; this is likely to
+             save calls.  */
+          base_name =
+            gl_locale_name_environ (LC_CTYPE, category_to_name (LC_CTYPE));
+          if (base_name == NULL)
+            base_name = gl_locale_name_default ();
+
+          if (setlocale_unixlike (LC_ALL, base_name) != NULL)
+            {
+              /* LC_CTYPE category already set.  */
+              i = 1;
+            }
+          else
+            {
+              /* On Mac OS X, "UTF-8" is a valid locale name for LC_CTYPE but
+                 not for LC_ALL.  Therefore this call may fail.  So, try
+                 another base_name.  */
+              base_name = "C";
+              if (setlocale_unixlike (LC_ALL, base_name) == NULL)
+                goto fail;
+              i = 0;
+            }
+#  if defined _WIN32 && ! defined __CYGWIN__
+          /* On native Windows, setlocale(LC_ALL,...) may succeed but set the
+             LC_CTYPE category to an invalid value ("C") when it does not
+             support the specified encoding.  Report a failure instead.  */
+          if (strchr (base_name, '.') != NULL
+              && strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+            goto fail;
+#  endif
+
+          for (; i < sizeof (categories) / sizeof (categories[0]); i++)
+            {
+              int cat = categories[i];
+              const char *name;
+
+              name = gl_locale_name_environ (cat, category_to_name (cat));
+              if (name == NULL)
+                name = gl_locale_name_default ();
+
+              /* If name is the same as base_name, it has already been set
+                 through the setlocale call before the loop.  */
+              if (strcmp (name, base_name) != 0
+#  if LC_MESSAGES == 1729
+                  || cat == LC_MESSAGES
+#  endif
+                 )
+                if (setlocale_single (cat, name) == NULL)
+#  if defined __APPLE__ && defined __MACH__
+                  {
+                    /* On Mac OS X 10.13, some locales can be set through
+                       System Preferences > Language & Region, that are not
+                       supported by libc.  The system's setlocale() falls
+                       back to "C" for these locale categories.  We can do
+                       better, by trying an existing locale with the same
+                       language or an existing locale with the same territory.
+                       If we can't, print a warning, to limit user
+                       expectations.  */
+                    int warn = 0;
+
+                    if (cat == LC_CTYPE)
+                      warn = (setlocale_single (cat, "UTF-8") == NULL);
+                    else if (cat == LC_MESSAGES)
+                      {
+#   if HAVE_CFLOCALECOPYPREFERREDLANGUAGES || HAVE_CFPREFERENCESCOPYAPPVALUE /* MacOS X 10.4 or newer */
+                        /* Take the primary language preference.  */
+#    if HAVE_CFLOCALECOPYPREFERREDLANGUAGES /* MacOS X 10.5 or newer */
+                        CFArrayRef prefArray = CFLocaleCopyPreferredLanguages ();
+#    elif HAVE_CFPREFERENCESCOPYAPPVALUE /* MacOS X 10.4 or newer */
+                        CFTypeRef preferences =
+                          CFPreferencesCopyAppValue (CFSTR ("AppleLanguages"),
+                                                     kCFPreferencesCurrentApplication);
+                        if (preferences != NULL
+                            && CFGetTypeID (preferences) == CFArrayGetTypeID ())
+                          {
+                            CFArrayRef prefArray = (CFArrayRef)preferences;
+#    endif
+                            int n = CFArrayGetCount (prefArray);
+                            if (n > 0)
+                              {
+                                char buf[256];
+                                CFTypeRef element = CFArrayGetValueAtIndex (prefArray, 0);
+                                if (element != NULL
+                                    && CFGetTypeID (element) == CFStringGetTypeID ()
+                                    && CFStringGetCString ((CFStringRef)element,
+                                                           buf, sizeof (buf),
+                                                           kCFStringEncodingASCII))
+                                  {
+                                    /* Remove the country.
+                                       E.g. "zh-Hans-DE" -> "zh-Hans".  */
+                                    char *last_minus = strrchr (buf, '-');
+                                    if (last_minus != NULL)
+                                      *last_minus = '\0';
+
+                                    /* Convert to Unix locale name.
+                                       E.g. "zh-Hans" -> "zh_CN".  */
+                                    gl_locale_name_canonicalize (buf);
+
+                                    /* Try setlocale with this value.  */
+                                    if (setlocale_single (cat, buf) == NULL)
+                                      {
+                                        const char *last_try =
+                                          get_main_locale_with_same_language (buf);
+
+                                        if (last_try == NULL
+                                            || setlocale_single (cat, last_try) == NULL)
+                                          warn = 1;
+                                      }
+                                  }
+                              }
+#    if HAVE_CFLOCALECOPYPREFERREDLANGUAGES /* MacOS X 10.5 or newer */
+                        CFRelease (prefArray);
+#    elif HAVE_CFPREFERENCESCOPYAPPVALUE /* MacOS X 10.4 or newer */
+                          }
+#    endif
+#   else
+                        const char *last_try =
+                          get_main_locale_with_same_language (name);
+
+                        if (last_try == NULL
+                            || setlocale_single (cat, last_try) == NULL)
+                          warn = 1;
+#   endif
+                      }
+                    else
+                      {
+                        /* For LC_NUMERIC, the application should use the locale
+                           properties kCFLocaleDecimalSeparator,
+                           kCFLocaleGroupingSeparator.
+                           For LC_TIME, the application should use the locale
+                           property kCFLocaleCalendarIdentifier.
+                           For LC_COLLATE, the application should use the locale
+                           properties kCFLocaleCollationIdentifier,
+                           kCFLocaleCollatorIdentifier.
+                           For LC_MONETARY, the applicationshould use the locale
+                           properties kCFLocaleCurrencySymbol,
+                           kCFLocaleCurrencyCode.
+                           But since most applications don't have macOS specific
+                           code like this, try an existing locale with the same
+                           territory.  */
+                        const char *last_try =
+                          get_main_locale_with_same_territory (name);
+
+                        if (last_try == NULL
+                            || setlocale_single (cat, last_try) == NULL)
+                          warn = 1;
+                      }
+
+                    if (warn)
+                      {
+                        /* Warn only if the environment variable
+                           SETLOCALE_VERBOSE is set.  Otherwise these warnings
+                           are just annoyances, since normal users won't invoke
+                           'localedef'.  */
+                        const char *verbose = getenv ("SETLOCALE_VERBOSE");
+                        if (verbose != NULL && verbose[0] != '\0')
+                          fprintf (stderr,
+                                   "Warning: Failed to set locale category %s to %s.\n",
+                                   category_to_name (cat), name);
+                      }
+                  }
+#  else
+                  goto fail;
+#  endif
+            }
+
+          /* All steps were successful.  */
+          free (saved_locale);
+          return setlocale (LC_ALL, NULL);
+
+        fail:
+          if (saved_locale[0] != '\0') /* don't risk an endless recursion */
+            setlocale (LC_ALL, saved_locale);
+          free (saved_locale);
+          return NULL;
+        }
+      else
+        {
+          const char *name =
+            gl_locale_name_environ (category, category_to_name (category));
+          if (name == NULL)
+            name = gl_locale_name_default ();
+
+          return setlocale_single (category, name);
+        }
+    }
+  else
+    {
+#  if defined _WIN32 && ! defined __CYGWIN__
+      if (category == LC_ALL && locale != NULL && strchr (locale, '.') != NULL)
+        {
+          char *saved_locale;
+
+          /* Back up the old locale.  */
+          saved_locale = setlocale (LC_ALL, NULL);
+          if (saved_locale == NULL)
+            return NULL;
+          saved_locale = strdup (saved_locale);
+          if (saved_locale == NULL)
+            return NULL;
+
+          if (setlocale_unixlike (LC_ALL, locale) == NULL)
+            {
+              free (saved_locale);
+              return NULL;
+            }
+
+          /* On native Windows, setlocale(LC_ALL,...) may succeed but set the
+             LC_CTYPE category to an invalid value ("C") when it does not
+             support the specified encoding.  Report a failure instead.  */
+          if (strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+            {
+              if (saved_locale[0] != '\0') /* don't risk an endless recursion */
+                setlocale (LC_ALL, saved_locale);
+              free (saved_locale);
+              return NULL;
+            }
+
+          /* It was really successful.  */
+          free (saved_locale);
+          return setlocale (LC_ALL, NULL);
+        }
+      else
+#  endif
+        return setlocale_single (category, locale);
+    }
+}
+
+# endif /* NEED_SETLOCALE_IMPROVED */
+
+#endif
diff --git a/src/grep/gnulib-tests/setsockopt.c b/src/grep/gnulib-tests/setsockopt.c
new file mode 100644
index 0000000..10b1e90
--- /dev/null
+++ b/src/grep/gnulib-tests/setsockopt.c
@@ -0,0 +1,65 @@
+/* setsockopt.c --- wrappers for Windows setsockopt function
+
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paolo Bonzini */
+
+#include <config.h>
+
+#define WIN32_LEAN_AND_MEAN
+/* Get winsock2.h. */
+#include <sys/socket.h>
+
+/* Get struct timeval. */
+#include <sys/time.h>
+
+/* Get set_winsock_errno, FD_TO_SOCKET etc. */
+#include "w32sock.h"
+
+#undef setsockopt
+
+int
+rpl_setsockopt (int fd, int level, int optname, const void *optval, socklen_t optlen)
+{
+  SOCKET sock = FD_TO_SOCKET (fd);
+  int r;
+
+  if (sock == INVALID_SOCKET)
+    {
+      errno = EBADF;
+      return -1;
+    }
+  else
+    {
+      if (level == SOL_SOCKET
+          && (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO))
+        {
+          const struct timeval *tv = optval;
+          int milliseconds = tv->tv_sec * 1000 + tv->tv_usec / 1000;
+          optval = &milliseconds;
+          r = setsockopt (sock, level, optname, optval, sizeof (int));
+        }
+      else
+        {
+          r = setsockopt (sock, level, optname, optval, optlen);
+        }
+
+      if (r < 0)
+        set_winsock_errno ();
+
+      return r;
+    }
+}
diff --git a/src/grep/gnulib-tests/sig-handler.c b/src/grep/gnulib-tests/sig-handler.c
new file mode 100644
index 0000000..6257914
--- /dev/null
+++ b/src/grep/gnulib-tests/sig-handler.c
@@ -0,0 +1,21 @@
+/* Convenience declarations when working with <signal.h>.
+
+   Copyright (C) 2012-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#define SIG_HANDLER_INLINE _GL_EXTERN_INLINE
+#include "sig-handler.h"
diff --git a/src/grep/gnulib-tests/sig-handler.h b/src/grep/gnulib-tests/sig-handler.h
new file mode 100644
index 0000000..0ce5897
--- /dev/null
+++ b/src/grep/gnulib-tests/sig-handler.h
@@ -0,0 +1,51 @@
+/* Convenience declarations when working with <signal.h>.
+
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GL_SIG_HANDLER_H
+#define _GL_SIG_HANDLER_H
+
+#include <signal.h>
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef SIG_HANDLER_INLINE
+# define SIG_HANDLER_INLINE _GL_INLINE
+#endif
+
+/* Convenience type when working with signal handlers.  */
+typedef void (*sa_handler_t) (int);
+
+/* Return the handler of a signal, as a sa_handler_t value regardless
+   of its true type.  The resulting function can be compared to
+   special values like SIG_IGN but it is not portable to call it.  */
+SIG_HANDLER_INLINE sa_handler_t _GL_ATTRIBUTE_PURE
+get_handler (struct sigaction const *a)
+{
+  /* POSIX says that special values like SIG_IGN can only occur when
+     action.sa_flags does not contain SA_SIGINFO.  But in Linux 2.4,
+     for example, sa_sigaction and sa_handler are aliases and a signal
+     is ignored if sa_sigaction (after casting) equals SIG_IGN.  In
+     this case, this implementation relies on the fact that the two
+     are aliases, and simply returns sa_handler.  */
+  return a->sa_handler;
+}
+
+_GL_INLINE_HEADER_END
+
+#endif /* _GL_SIG_HANDLER_H */
diff --git a/src/grep/gnulib-tests/sigaction.c b/src/grep/gnulib-tests/sigaction.c
new file mode 100644
index 0000000..e1ace46
--- /dev/null
+++ b/src/grep/gnulib-tests/sigaction.c
@@ -0,0 +1,204 @@
+/* POSIX compatible signal blocking.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+   Written by Eric Blake <ebb9@byu.net>, 2008.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <signal.h>
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+/* This implementation of sigaction is tailored to native Windows behavior:
+   signal() has SysV semantics (ie. the handler is uninstalled before
+   it is invoked).  This is an inherent data race if an asynchronous
+   signal is sent twice in a row before we can reinstall our handler,
+   but there's nothing we can do about it.  Meanwhile, sigprocmask()
+   is not present, and while we can use the gnulib replacement to
+   provide critical sections, it too suffers from potential data races
+   in the face of an ill-timed asynchronous signal.  And we compound
+   the situation by reading static storage in a signal handler, which
+   POSIX warns is not generically async-signal-safe.  Oh well.
+
+   Additionally:
+     - We don't implement SA_NOCLDSTOP or SA_NOCLDWAIT, because SIGCHLD
+       is not defined.
+     - We don't implement SA_ONSTACK, because sigaltstack() is not present.
+     - We ignore SA_RESTART, because blocking native Windows API calls are
+       not interrupted anyway when an asynchronous signal occurs, and the
+       MSVCRT runtime never sets errno to EINTR.
+     - We don't implement SA_SIGINFO because it is impossible to do so
+       portably.
+
+   POSIX states that an application should not mix signal() and
+   sigaction().  We support the use of signal() within the gnulib
+   sigprocmask() substitute, but all other application code linked
+   with this module should stick with only sigaction().  */
+
+/* Check some of our assumptions.  */
+#if defined SIGCHLD || defined HAVE_SIGALTSTACK || defined HAVE_SIGINTERRUPT
+# error "Revisit the assumptions made in the sigaction module"
+#endif
+
+/* Out-of-range substitutes make a good fallback for uncatchable
+   signals.  */
+#ifndef SIGKILL
+# define SIGKILL (-1)
+#endif
+#ifndef SIGSTOP
+# define SIGSTOP (-1)
+#endif
+
+/* On native Windows, as of 2008, the signal SIGABRT_COMPAT is an alias
+   for the signal SIGABRT.  Only one signal handler is stored for both
+   SIGABRT and SIGABRT_COMPAT.  SIGABRT_COMPAT is not a signal of its own.  */
+#if defined _WIN32 && ! defined __CYGWIN__
+# undef SIGABRT_COMPAT
+# define SIGABRT_COMPAT 6
+#endif
+
+/* A signal handler.  */
+typedef void (*handler_t) (int signal);
+
+/* Set of current actions.  If sa_handler for an entry is NULL, then
+   that signal is not currently handled by the sigaction handler.  */
+static struct sigaction volatile action_array[NSIG] /* = 0 */;
+
+/* Signal handler that is installed for signals.  */
+static void
+sigaction_handler (int sig)
+{
+  handler_t handler;
+  sigset_t mask;
+  sigset_t oldmask;
+  int saved_errno = errno;
+  if (sig < 0 || NSIG <= sig || !action_array[sig].sa_handler)
+    {
+      /* Unexpected situation; be careful to avoid recursive abort.  */
+      if (sig == SIGABRT)
+        signal (SIGABRT, SIG_DFL);
+      abort ();
+    }
+
+  /* Reinstall the signal handler when required; otherwise update the
+     bookkeeping so that the user's handler may call sigaction and get
+     accurate results.  We know the signal isn't currently blocked, or
+     we wouldn't be in its handler, therefore we know that we are not
+     interrupting a sigaction() call.  There is a race where any
+     asynchronous instance of the same signal occurring before we
+     reinstall the handler will trigger the default handler; oh
+     well.  */
+  handler = action_array[sig].sa_handler;
+  if ((action_array[sig].sa_flags & SA_RESETHAND) == 0)
+    signal (sig, sigaction_handler);
+  else
+    action_array[sig].sa_handler = NULL;
+
+  /* Block appropriate signals.  */
+  mask = action_array[sig].sa_mask;
+  if ((action_array[sig].sa_flags & SA_NODEFER) == 0)
+    sigaddset (&mask, sig);
+  sigprocmask (SIG_BLOCK, &mask, &oldmask);
+
+  /* Invoke the user's handler, then restore prior mask.  */
+  errno = saved_errno;
+  handler (sig);
+  saved_errno = errno;
+  sigprocmask (SIG_SETMASK, &oldmask, NULL);
+  errno = saved_errno;
+}
+
+/* Change and/or query the action that will be taken on delivery of
+   signal SIG.  If not NULL, ACT describes the new behavior.  If not
+   NULL, OACT is set to the prior behavior.  Return 0 on success, or
+   set errno and return -1 on failure.  */
+int
+sigaction (int sig, const struct sigaction *restrict act,
+           struct sigaction *restrict oact)
+{
+  sigset_t mask;
+  sigset_t oldmask;
+  int saved_errno;
+
+  if (sig < 0 || NSIG <= sig || sig == SIGKILL || sig == SIGSTOP
+      || (act && act->sa_handler == SIG_ERR))
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+#ifdef SIGABRT_COMPAT
+  if (sig == SIGABRT_COMPAT)
+    sig = SIGABRT;
+#endif
+
+  /* POSIX requires sigaction() to be async-signal-safe.  In other
+     words, if an asynchronous signal can occur while we are anywhere
+     inside this function, the user's handler could then call
+     sigaction() recursively and expect consistent results.  We meet
+     this rule by using sigprocmask to block all signals before
+     modifying any data structure that could be read from a signal
+     handler; this works since we know that the gnulib sigprocmask
+     replacement does not try to use sigaction() from its handler.  */
+  if (!act && !oact)
+    return 0;
+  sigfillset (&mask);
+  sigprocmask (SIG_BLOCK, &mask, &oldmask);
+  if (oact)
+    {
+      if (action_array[sig].sa_handler)
+        *oact = action_array[sig];
+      else
+        {
+          /* Safe to change the handler at will here, since all
+             signals are currently blocked.  */
+          oact->sa_handler = signal (sig, SIG_DFL);
+          if (oact->sa_handler == SIG_ERR)
+            goto failure;
+          signal (sig, oact->sa_handler);
+          oact->sa_flags = SA_RESETHAND | SA_NODEFER;
+          sigemptyset (&oact->sa_mask);
+        }
+    }
+
+  if (act)
+    {
+      /* Safe to install the handler before updating action_array,
+         since all signals are currently blocked.  */
+      if (act->sa_handler == SIG_DFL || act->sa_handler == SIG_IGN)
+        {
+          if (signal (sig, act->sa_handler) == SIG_ERR)
+            goto failure;
+          action_array[sig].sa_handler = NULL;
+        }
+      else
+        {
+          if (signal (sig, sigaction_handler) == SIG_ERR)
+            goto failure;
+          action_array[sig] = *act;
+        }
+    }
+  sigprocmask (SIG_SETMASK, &oldmask, NULL);
+  return 0;
+
+ failure:
+  saved_errno = errno;
+  sigprocmask (SIG_SETMASK, &oldmask, NULL);
+  errno = saved_errno;
+  return -1;
+}
diff --git a/src/grep/gnulib-tests/signature.h b/src/grep/gnulib-tests/signature.h
new file mode 100644
index 0000000..f791783
--- /dev/null
+++ b/src/grep/gnulib-tests/signature.h
@@ -0,0 +1,48 @@
+/* Macro for checking that a function declaration is compliant.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef SIGNATURE_CHECK
+
+/* Check that the function FN takes the specified arguments ARGS with
+   a return type of RET.  This header is designed to be included after
+   <config.h> and the one system header that is supposed to contain
+   the function being checked, but prior to any other system headers
+   that are necessary for the unit test.  Therefore, this file does
+   not include any system headers, nor reference anything outside of
+   the macro arguments.  For an example, if foo.h should provide:
+
+   extern int foo (char, float);
+
+   then the unit test named test-foo.c would start out with:
+
+   #include <config.h>
+   #include <foo.h>
+   #include "signature.h"
+   SIGNATURE_CHECK (foo, int, (char, float));
+   #include <other.h>
+   ...
+*/
+# define SIGNATURE_CHECK(fn, ret, args) \
+  SIGNATURE_CHECK1 (fn, ret, args, __LINE__)
+
+/* Necessary to allow multiple SIGNATURE_CHECK lines in a unit test.
+   Note that the checks must not occupy the same line.  */
+# define SIGNATURE_CHECK1(fn, ret, args, id) \
+  SIGNATURE_CHECK2 (fn, ret, args, id) /* macroexpand line */
+# define SIGNATURE_CHECK2(fn, ret, args, id) \
+  static ret (* _GL_UNUSED signature_check ## id) args = fn
+
+#endif /* SIGNATURE_CHECK */
diff --git a/src/grep/gnulib-tests/sigprocmask.c b/src/grep/gnulib-tests/sigprocmask.c
new file mode 100644
index 0000000..c479204
--- /dev/null
+++ b/src/grep/gnulib-tests/sigprocmask.c
@@ -0,0 +1,349 @@
+/* POSIX compatible signal blocking.
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2006.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <signal.h>
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+# include "msvc-inval.h"
+#endif
+
+/* We assume that a platform without POSIX signal blocking functions
+   also does not have the POSIX sigaction() function, only the
+   signal() function.  We also assume signal() has SysV semantics,
+   where any handler is uninstalled prior to being invoked.  This is
+   true for native Windows platforms.  */
+
+/* We use raw signal(), but also provide a wrapper rpl_signal() so
+   that applications can query or change a blocked signal.  */
+#undef signal
+
+/* Provide invalid signal numbers as fallbacks if the uncatchable
+   signals are not defined.  */
+#ifndef SIGKILL
+# define SIGKILL (-1)
+#endif
+#ifndef SIGSTOP
+# define SIGSTOP (-1)
+#endif
+
+/* On native Windows, as of 2008, the signal SIGABRT_COMPAT is an alias
+   for the signal SIGABRT.  Only one signal handler is stored for both
+   SIGABRT and SIGABRT_COMPAT.  SIGABRT_COMPAT is not a signal of its own.  */
+#if defined _WIN32 && ! defined __CYGWIN__
+# undef SIGABRT_COMPAT
+# define SIGABRT_COMPAT 6
+#endif
+#ifdef SIGABRT_COMPAT
+# define SIGABRT_COMPAT_MASK (1U << SIGABRT_COMPAT)
+#else
+# define SIGABRT_COMPAT_MASK 0
+#endif
+
+typedef void (*handler_t) (int);
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+static handler_t
+signal_nothrow (int sig, handler_t handler)
+{
+  handler_t result;
+
+  TRY_MSVC_INVAL
+    {
+      result = signal (sig, handler);
+    }
+  CATCH_MSVC_INVAL
+    {
+      result = SIG_ERR;
+      errno = EINVAL;
+    }
+  DONE_MSVC_INVAL;
+
+  return result;
+}
+# define signal signal_nothrow
+#endif
+
+/* Handling of gnulib defined signals.  */
+
+#if GNULIB_defined_SIGPIPE
+static handler_t SIGPIPE_handler = SIG_DFL;
+#endif
+
+#if GNULIB_defined_SIGPIPE
+static handler_t
+ext_signal (int sig, handler_t handler)
+{
+  switch (sig)
+    {
+    case SIGPIPE:
+      {
+        handler_t old_handler = SIGPIPE_handler;
+        SIGPIPE_handler = handler;
+        return old_handler;
+      }
+    default: /* System defined signal */
+      return signal (sig, handler);
+    }
+}
+# undef signal
+# define signal ext_signal
+#endif
+
+int
+sigismember (const sigset_t *set, int sig)
+{
+  if (sig >= 0 && sig < NSIG)
+    {
+      #ifdef SIGABRT_COMPAT
+      if (sig == SIGABRT_COMPAT)
+        sig = SIGABRT;
+      #endif
+
+      return (*set >> sig) & 1;
+    }
+  else
+    return 0;
+}
+
+int
+sigemptyset (sigset_t *set)
+{
+  *set = 0;
+  return 0;
+}
+
+int
+sigaddset (sigset_t *set, int sig)
+{
+  if (sig >= 0 && sig < NSIG)
+    {
+      #ifdef SIGABRT_COMPAT
+      if (sig == SIGABRT_COMPAT)
+        sig = SIGABRT;
+      #endif
+
+      *set |= 1U << sig;
+      return 0;
+    }
+  else
+    {
+      errno = EINVAL;
+      return -1;
+    }
+}
+
+int
+sigdelset (sigset_t *set, int sig)
+{
+  if (sig >= 0 && sig < NSIG)
+    {
+      #ifdef SIGABRT_COMPAT
+      if (sig == SIGABRT_COMPAT)
+        sig = SIGABRT;
+      #endif
+
+      *set &= ~(1U << sig);
+      return 0;
+    }
+  else
+    {
+      errno = EINVAL;
+      return -1;
+    }
+}
+
+
+int
+sigfillset (sigset_t *set)
+{
+  *set = ((2U << (NSIG - 1)) - 1) & ~ SIGABRT_COMPAT_MASK;
+  return 0;
+}
+
+/* Set of currently blocked signals.  */
+static volatile sigset_t blocked_set /* = 0 */;
+
+/* Set of currently blocked and pending signals.  */
+static volatile sig_atomic_t pending_array[NSIG] /* = { 0 } */;
+
+/* Signal handler that is installed for blocked signals.  */
+static void
+blocked_handler (int sig)
+{
+  /* Reinstall the handler, in case the signal occurs multiple times
+     while blocked.  There is an inherent race where an asynchronous
+     signal in between when the kernel uninstalled the handler and
+     when we reinstall it will trigger the default handler; oh
+     well.  */
+  signal (sig, blocked_handler);
+  if (sig >= 0 && sig < NSIG)
+    pending_array[sig] = 1;
+}
+
+int
+sigpending (sigset_t *set)
+{
+  sigset_t pending = 0;
+  int sig;
+
+  for (sig = 0; sig < NSIG; sig++)
+    if (pending_array[sig])
+      pending |= 1U << sig;
+  *set = pending;
+  return 0;
+}
+
+/* The previous signal handlers.
+   Only the array elements corresponding to blocked signals are relevant.  */
+static volatile handler_t old_handlers[NSIG];
+
+int
+sigprocmask (int operation, const sigset_t *set, sigset_t *old_set)
+{
+  if (old_set != NULL)
+    *old_set = blocked_set;
+
+  if (set != NULL)
+    {
+      sigset_t new_blocked_set;
+      sigset_t to_unblock;
+      sigset_t to_block;
+
+      switch (operation)
+        {
+        case SIG_BLOCK:
+          new_blocked_set = blocked_set | *set;
+          break;
+        case SIG_SETMASK:
+          new_blocked_set = *set;
+          break;
+        case SIG_UNBLOCK:
+          new_blocked_set = blocked_set & ~*set;
+          break;
+        default:
+          errno = EINVAL;
+          return -1;
+        }
+      to_unblock = blocked_set & ~new_blocked_set;
+      to_block = new_blocked_set & ~blocked_set;
+
+      if (to_block != 0)
+        {
+          int sig;
+
+          for (sig = 0; sig < NSIG; sig++)
+            if ((to_block >> sig) & 1)
+              {
+                pending_array[sig] = 0;
+                if ((old_handlers[sig] = signal (sig, blocked_handler)) != SIG_ERR)
+                  blocked_set |= 1U << sig;
+              }
+        }
+
+      if (to_unblock != 0)
+        {
+          sig_atomic_t received[NSIG];
+          int sig;
+
+          for (sig = 0; sig < NSIG; sig++)
+            if ((to_unblock >> sig) & 1)
+              {
+                if (signal (sig, old_handlers[sig]) != blocked_handler)
+                  /* The application changed a signal handler while the signal
+                     was blocked, bypassing our rpl_signal replacement.
+                     We don't support this.  */
+                  abort ();
+                received[sig] = pending_array[sig];
+                blocked_set &= ~(1U << sig);
+                pending_array[sig] = 0;
+              }
+            else
+              received[sig] = 0;
+
+          for (sig = 0; sig < NSIG; sig++)
+            if (received[sig])
+              raise (sig);
+        }
+    }
+  return 0;
+}
+
+/* Install the handler FUNC for signal SIG, and return the previous
+   handler.  */
+handler_t
+rpl_signal (int sig, handler_t handler)
+{
+  /* We must provide a wrapper, so that a user can query what handler
+     they installed even if that signal is currently blocked.  */
+  if (sig >= 0 && sig < NSIG && sig != SIGKILL && sig != SIGSTOP
+      && handler != SIG_ERR)
+    {
+      #ifdef SIGABRT_COMPAT
+      if (sig == SIGABRT_COMPAT)
+        sig = SIGABRT;
+      #endif
+
+      if (blocked_set & (1U << sig))
+        {
+          /* POSIX states that sigprocmask and signal are both
+             async-signal-safe.  This is not true of our
+             implementation - there is a slight data race where an
+             asynchronous interrupt on signal A can occur after we
+             install blocked_handler but before we have updated
+             old_handlers for signal B, such that handler A can see
+             stale information if it calls signal(B).  Oh well -
+             signal handlers really shouldn't try to manipulate the
+             installed handlers of unrelated signals.  */
+          handler_t result = old_handlers[sig];
+          old_handlers[sig] = handler;
+          return result;
+        }
+      else
+        return signal (sig, handler);
+    }
+  else
+    {
+      errno = EINVAL;
+      return SIG_ERR;
+    }
+}
+
+#if GNULIB_defined_SIGPIPE
+/* Raise the signal SIGPIPE.  */
+int
+_gl_raise_SIGPIPE (void)
+{
+  if (blocked_set & (1U << SIGPIPE))
+    pending_array[SIGPIPE] = 1;
+  else
+    {
+      handler_t handler = SIGPIPE_handler;
+      if (handler == SIG_DFL)
+        exit (128 + SIGPIPE);
+      else if (handler != SIG_IGN)
+        (*handler) (SIGPIPE);
+    }
+  return 0;
+}
+#endif
diff --git a/src/grep/gnulib-tests/size_max.h b/src/grep/gnulib-tests/size_max.h
new file mode 100644
index 0000000..1186ba9
--- /dev/null
+++ b/src/grep/gnulib-tests/size_max.h
@@ -0,0 +1,30 @@
+/* size_max.h -- declare SIZE_MAX through system headers
+   Copyright (C) 2005-2006, 2009-2021 Free Software Foundation, Inc.
+   Written by Simon Josefsson.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef GNULIB_SIZE_MAX_H
+#define GNULIB_SIZE_MAX_H
+
+/* Get SIZE_MAX declaration on systems like Solaris 7/8/9.  */
+# include <limits.h>
+/* Get SIZE_MAX declaration on systems like glibc 2.  */
+# if HAVE_STDINT_H
+#  include <stdint.h>
+# endif
+/* On systems where these include files don't define it, SIZE_MAX is defined
+   in config.h.  */
+
+#endif /* GNULIB_SIZE_MAX_H */
diff --git a/src/grep/gnulib-tests/sleep.c b/src/grep/gnulib-tests/sleep.c
new file mode 100644
index 0000000..0b49eb7
--- /dev/null
+++ b/src/grep/gnulib-tests/sleep.c
@@ -0,0 +1,76 @@
+/* Pausing execution of the current thread.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2007.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+#include <limits.h>
+
+#include "verify.h"
+
+#if defined _WIN32 && ! defined __CYGWIN__
+
+# define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+# include <windows.h>
+
+unsigned int
+sleep (unsigned int seconds)
+{
+  unsigned int remaining;
+
+  /* Sleep for 1 second many times, because
+       1. Sleep is not interruptible by Ctrl-C,
+       2. we want to avoid arithmetic overflow while multiplying with 1000.  */
+  for (remaining = seconds; remaining > 0; remaining--)
+    Sleep (1000);
+
+  return remaining;
+}
+
+#elif HAVE_SLEEP
+
+# undef sleep
+
+/* Guarantee unlimited sleep and a reasonable return value.  Cygwin
+   1.5.x rejects attempts to sleep more than 49.7 days (2**32
+   milliseconds), but uses uninitialized memory which results in a
+   garbage answer.  Similarly, Linux 2.6.9 with glibc 2.3.4 has a too
+   small return value when asked to sleep more than 24.85 days.  */
+unsigned int
+rpl_sleep (unsigned int seconds)
+{
+  /* This requires int larger than 16 bits.  */
+  verify (UINT_MAX / 24 / 24 / 60 / 60);
+  const unsigned int limit = 24 * 24 * 60 * 60;
+  while (limit < seconds)
+    {
+      unsigned int result;
+      seconds -= limit;
+      result = sleep (limit);
+      if (result)
+        return seconds + result;
+    }
+  return sleep (seconds);
+}
+
+#else /* !HAVE_SLEEP */
+
+ #error "Please port gnulib sleep.c to your platform, possibly using usleep() or select(), then report this to bug-gnulib."
+
+#endif
diff --git a/src/grep/gnulib-tests/snprintf.c b/src/grep/gnulib-tests/snprintf.c
new file mode 100644
index 0000000..a589cf1
--- /dev/null
+++ b/src/grep/gnulib-tests/snprintf.c
@@ -0,0 +1,71 @@
+/* Formatted output to strings.
+   Copyright (C) 2004, 2006-2021 Free Software Foundation, Inc.
+   Written by Simon Josefsson and Paul Eggert.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdio.h>
+
+#include <errno.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "vasnprintf.h"
+
+/* Print formatted output to string STR.  Similar to sprintf, but
+   additional length SIZE limit how much is written into STR.  Returns
+   string length of formatted string (which may be larger than SIZE).
+   STR may be NULL, in which case nothing will be written.  On error,
+   return a negative value.  */
+int
+snprintf (char *str, size_t size, const char *format, ...)
+{
+  char *output;
+  size_t len;
+  size_t lenbuf = size;
+  va_list args;
+
+  va_start (args, format);
+  output = vasnprintf (str, &lenbuf, format, args);
+  len = lenbuf;
+  va_end (args);
+
+  if (!output)
+    return -1;
+
+  if (output != str)
+    {
+      if (size)
+        {
+          size_t pruned_len = (len < size ? len : size - 1);
+          memcpy (str, output, pruned_len);
+          str[pruned_len] = '\0';
+        }
+
+      free (output);
+    }
+
+  if (INT_MAX < len)
+    {
+      errno = EOVERFLOW;
+      return -1;
+    }
+
+  return len;
+}
diff --git a/src/grep/gnulib-tests/socket.c b/src/grep/gnulib-tests/socket.c
new file mode 100644
index 0000000..0f2e6ff
--- /dev/null
+++ b/src/grep/gnulib-tests/socket.c
@@ -0,0 +1,53 @@
+/* socket.c --- wrappers for Windows socket function
+
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paolo Bonzini */
+
+#include <config.h>
+
+#define WIN32_LEAN_AND_MEAN
+/* Get winsock2.h. */
+#include <sys/socket.h>
+
+/* Get set_winsock_errno, FD_TO_SOCKET etc. */
+#include "w32sock.h"
+
+#include "sockets.h"
+
+/* Don't assume that UNICODE is defined.  */
+#undef WSASocket
+#define WSASocket WSASocketW
+
+int
+rpl_socket (int domain, int type, int protocol)
+{
+  SOCKET fh;
+
+  gl_sockets_startup (SOCKETS_1_1);
+
+  /* We have to use WSASocket() to create non-overlapped IO sockets.
+     Overlapped IO sockets cannot be used with read/write.  */
+  fh = WSASocket (domain, type, protocol, NULL, 0, 0);
+
+  if (fh == INVALID_SOCKET)
+    {
+      set_winsock_errno ();
+      return -1;
+    }
+  else
+    return SOCKET_TO_FD (fh);
+}
diff --git a/src/grep/gnulib-tests/sockets.c b/src/grep/gnulib-tests/sockets.c
new file mode 100644
index 0000000..934da73
--- /dev/null
+++ b/src/grep/gnulib-tests/sockets.c
@@ -0,0 +1,161 @@
+/* sockets.c --- wrappers for Windows socket functions
+
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Simon Josefsson */
+
+#include <config.h>
+
+/* Specification.  */
+#include "sockets.h"
+
+#if WINDOWS_SOCKETS
+
+/* This includes winsock2.h on MinGW. */
+# include <sys/socket.h>
+
+# include "fd-hook.h"
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+
+/* Get set_winsock_errno, FD_TO_SOCKET etc. */
+# include "w32sock.h"
+
+static int
+close_fd_maybe_socket (const struct fd_hook *remaining_list,
+                       gl_close_fn primary,
+                       int fd)
+{
+  /* Note about multithread-safety: There is a race condition where, between
+     our calls to closesocket() and the primary close(), some other thread
+     could make system calls that allocate precisely the same HANDLE value
+     as sock; then the primary close() would call CloseHandle() on it.  */
+  SOCKET sock;
+  WSANETWORKEVENTS ev;
+
+  /* Test whether fd refers to a socket.  */
+  sock = FD_TO_SOCKET (fd);
+  ev.lNetworkEvents = 0xDEADBEEF;
+  WSAEnumNetworkEvents (sock, NULL, &ev);
+  if (ev.lNetworkEvents != 0xDEADBEEF)
+    {
+      /* fd refers to a socket.  */
+      /* FIXME: other applications, like squid, use an undocumented
+         _free_osfhnd free function.  But this is not enough: The 'osfile'
+         flags for fd also needs to be cleared, but it is hard to access it.
+         Instead, here we just close twice the file descriptor.  */
+      if (closesocket (sock))
+        {
+          set_winsock_errno ();
+          return -1;
+        }
+      else
+        {
+          /* This call frees the file descriptor and does a
+             CloseHandle ((HANDLE) _get_osfhandle (fd)), which fails.  */
+          _close (fd);
+          return 0;
+        }
+    }
+  else
+    /* Some other type of file descriptor.  */
+    return execute_close_hooks (remaining_list, primary, fd);
+}
+
+static int
+ioctl_fd_maybe_socket (const struct fd_hook *remaining_list,
+                       gl_ioctl_fn primary,
+                       int fd, int request, void *arg)
+{
+  SOCKET sock;
+  WSANETWORKEVENTS ev;
+
+  /* Test whether fd refers to a socket.  */
+  sock = FD_TO_SOCKET (fd);
+  ev.lNetworkEvents = 0xDEADBEEF;
+  WSAEnumNetworkEvents (sock, NULL, &ev);
+  if (ev.lNetworkEvents != 0xDEADBEEF)
+    {
+      /* fd refers to a socket.  */
+      if (ioctlsocket (sock, request, arg) < 0)
+        {
+          set_winsock_errno ();
+          return -1;
+        }
+      else
+        return 0;
+    }
+  else
+    /* Some other type of file descriptor.  */
+    return execute_ioctl_hooks (remaining_list, primary, fd, request, arg);
+}
+
+static struct fd_hook fd_sockets_hook;
+
+static int initialized_sockets_version /* = 0 */;
+
+#endif /* WINDOWS_SOCKETS */
+
+int
+gl_sockets_startup (int version _GL_UNUSED)
+{
+#if WINDOWS_SOCKETS
+  if (version > initialized_sockets_version)
+    {
+      WSADATA data;
+      int err;
+
+      err = WSAStartup (version, &data);
+      if (err != 0)
+        return 1;
+
+      if (data.wVersion != version)
+        {
+          WSACleanup ();
+          return 2;
+        }
+
+      if (initialized_sockets_version == 0)
+        register_fd_hook (close_fd_maybe_socket, ioctl_fd_maybe_socket,
+                          &fd_sockets_hook);
+
+      initialized_sockets_version = version;
+    }
+#endif
+
+  return 0;
+}
+
+int
+gl_sockets_cleanup (void)
+{
+#if WINDOWS_SOCKETS
+  int err;
+
+  initialized_sockets_version = 0;
+
+  unregister_fd_hook (&fd_sockets_hook);
+
+  err = WSACleanup ();
+  if (err != 0)
+    return 1;
+#endif
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/sockets.h b/src/grep/gnulib-tests/sockets.h
new file mode 100644
index 0000000..e70c2bb
--- /dev/null
+++ b/src/grep/gnulib-tests/sockets.h
@@ -0,0 +1,66 @@
+/* sockets.h - wrappers for Windows socket functions
+
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Simon Josefsson */
+
+#ifndef SOCKETS_H
+#define SOCKETS_H 1
+
+#define SOCKETS_1_0 0x0001
+#define SOCKETS_1_1 0x0101
+#define SOCKETS_2_0 0x0002
+#define SOCKETS_2_1 0x0102
+#define SOCKETS_2_2 0x0202
+
+int gl_sockets_startup (int version)
+#ifndef WINDOWS_SOCKETS
+  _GL_ATTRIBUTE_CONST
+#endif
+  ;
+
+int gl_sockets_cleanup (void)
+#ifndef WINDOWS_SOCKETS
+  _GL_ATTRIBUTE_CONST
+#endif
+  ;
+
+/* This function is useful it you create a socket using gnulib's
+   Winsock wrappers but needs to pass on the socket handle to some
+   other library that only accepts sockets. */
+#ifdef WINDOWS_SOCKETS
+
+# include <sys/socket.h>
+
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+
+static inline SOCKET
+gl_fd_to_handle (int fd)
+{
+  return _get_osfhandle (fd);
+}
+
+#else
+
+# define gl_fd_to_handle(x) (x)
+
+#endif /* WINDOWS_SOCKETS */
+
+#endif /* SOCKETS_H */
diff --git a/src/grep/gnulib-tests/strerror_r.c b/src/grep/gnulib-tests/strerror_r.c
new file mode 100644
index 0000000..f024452
--- /dev/null
+++ b/src/grep/gnulib-tests/strerror_r.c
@@ -0,0 +1,452 @@
+/* strerror_r.c --- POSIX compatible system error routine
+
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2010.  */
+
+#include <config.h>
+
+/* Enable declaration of sys_nerr and sys_errlist in <errno.h> on NetBSD.  */
+#define _NETBSD_SOURCE 1
+
+/* Specification.  */
+#include <string.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#if !HAVE_SNPRINTF
+# include <stdarg.h>
+#endif
+
+#include "strerror-override.h"
+
+#if (__GLIBC__ >= 2 || defined __UCLIBC__ || defined __CYGWIN__) && HAVE___XPG_STRERROR_R /* glibc >= 2.3.4, cygwin >= 1.7.9 */
+
+# define USE_XPG_STRERROR_R 1
+extern
+#ifdef __cplusplus
+"C"
+#endif
+int __xpg_strerror_r (int errnum, char *buf, size_t buflen);
+
+#elif HAVE_DECL_STRERROR_R && !(__GLIBC__ >= 2 || defined __UCLIBC__ || defined __CYGWIN__)
+
+/* The system's strerror_r function is OK, except that its third argument
+   is 'int', not 'size_t', or its return type is wrong.  */
+
+# include <limits.h>
+
+# define USE_SYSTEM_STRERROR_R 1
+
+#else /* (__GLIBC__ >= 2 || defined __UCLIBC__ || defined __CYGWIN__ ? !HAVE___XPG_STRERROR_R : !HAVE_DECL_STRERROR_R) */
+
+/* Use the system's strerror().  Exclude glibc and cygwin because the
+   system strerror_r has the wrong return type, and cygwin 1.7.9
+   strerror_r clobbers strerror.  */
+# undef strerror
+
+# define USE_SYSTEM_STRERROR 1
+
+# if defined __NetBSD__ || defined __hpux || (defined _WIN32 && !defined __CYGWIN__) || defined __sgi || (defined __sun && !defined _LP64) || defined __CYGWIN__
+
+/* No locking needed.  */
+
+/* Get catgets internationalization functions.  */
+#  if HAVE_CATGETS
+#   include <nl_types.h>
+#  endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Get sys_nerr, sys_errlist on HP-UX (otherwise only declared in C++ mode).
+   Get sys_nerr, sys_errlist on IRIX (otherwise only declared with _SGIAPI).  */
+#  if defined __hpux || defined __sgi
+extern int sys_nerr;
+extern char *sys_errlist[];
+#  endif
+
+/* Get sys_nerr on Solaris.  */
+#  if defined __sun && !defined _LP64
+extern int sys_nerr;
+#  endif
+
+#ifdef __cplusplus
+}
+#endif
+
+# else
+
+#  include "glthread/lock.h"
+
+/* This lock protects the buffer returned by strerror().  We assume that
+   no other uses of strerror() exist in the program.  */
+gl_lock_define_initialized(static, strerror_lock)
+
+# endif
+
+#endif
+
+/* On MSVC, there is no snprintf() function, just a _snprintf().
+   It is of lower quality, but sufficient for the simple use here.
+   We only have to make sure to NUL terminate the result (_snprintf
+   does not NUL terminate, like strncpy).  */
+#if !HAVE_SNPRINTF
+static int
+local_snprintf (char *buf, size_t buflen, const char *format, ...)
+{
+  va_list args;
+  int result;
+
+  va_start (args, format);
+  result = _vsnprintf (buf, buflen, format, args);
+  va_end (args);
+  if (buflen > 0 && (result < 0 || result >= buflen))
+    buf[buflen - 1] = '\0';
+  return result;
+}
+# undef snprintf
+# define snprintf local_snprintf
+#endif
+
+/* Copy as much of MSG into BUF as possible, without corrupting errno.
+   Return 0 if MSG fit in BUFLEN, otherwise return ERANGE.  */
+static int
+safe_copy (char *buf, size_t buflen, const char *msg)
+{
+  size_t len = strlen (msg);
+  size_t moved = len < buflen ? len : buflen - 1;
+
+  /* Although POSIX lets memmove corrupt errno, we don't
+     know of any implementation where this is a real problem.  */
+  memmove (buf, msg, moved);
+  buf[moved] = '\0';
+  return len < buflen ? 0 : ERANGE;
+}
+
+
+int
+strerror_r (int errnum, char *buf, size_t buflen)
+#undef strerror_r
+{
+  /* Filter this out now, so that rest of this replacement knows that
+     there is room for a non-empty message and trailing NUL.  */
+  if (buflen <= 1)
+    {
+      if (buflen)
+        *buf = '\0';
+      return ERANGE;
+    }
+  *buf = '\0';
+
+  /* Check for gnulib overrides.  */
+  {
+    char const *msg = strerror_override (errnum);
+
+    if (msg)
+      return safe_copy (buf, buflen, msg);
+  }
+
+  {
+    int ret;
+    int saved_errno = errno;
+
+#if USE_XPG_STRERROR_R
+
+    {
+      ret = __xpg_strerror_r (errnum, buf, buflen);
+      if (ret < 0)
+        ret = errno;
+      if (!*buf)
+        {
+          /* glibc 2.13 would not touch buf on err, so we have to fall
+             back to GNU strerror_r which always returns a thread-safe
+             untruncated string to (partially) copy into our buf.  */
+          safe_copy (buf, buflen, strerror_r (errnum, buf, buflen));
+        }
+    }
+
+#elif USE_SYSTEM_STRERROR_R
+
+    if (buflen > INT_MAX)
+      buflen = INT_MAX;
+
+# ifdef __hpux
+    /* On HP-UX 11.31, strerror_r always fails when buflen < 80; it
+       also fails to change buf on EINVAL.  */
+    {
+      char stackbuf[80];
+
+      if (buflen < sizeof stackbuf)
+        {
+          ret = strerror_r (errnum, stackbuf, sizeof stackbuf);
+          if (ret == 0)
+            ret = safe_copy (buf, buflen, stackbuf);
+        }
+      else
+        ret = strerror_r (errnum, buf, buflen);
+    }
+# else
+    ret = strerror_r (errnum, buf, buflen);
+
+    /* Some old implementations may return (-1, EINVAL) instead of EINVAL.
+       But on Haiku, valid error numbers are negative.  */
+#  if !defined __HAIKU__
+    if (ret < 0)
+      ret = errno;
+#  endif
+# endif
+
+# if defined _AIX || defined __HAIKU__
+    /* AIX and Haiku return 0 rather than ERANGE when truncating strings; try
+       again until we are sure we got the entire string.  */
+    if (!ret && strlen (buf) == buflen - 1)
+      {
+        char stackbuf[STACKBUF_LEN];
+        size_t len;
+        strerror_r (errnum, stackbuf, sizeof stackbuf);
+        len = strlen (stackbuf);
+        /* STACKBUF_LEN should have been large enough.  */
+        if (len + 1 == sizeof stackbuf)
+          abort ();
+        if (buflen <= len)
+          ret = ERANGE;
+      }
+# else
+    /* Solaris 10 does not populate buf on ERANGE.  OpenBSD 4.7
+       truncates early on ERANGE rather than return a partial integer.
+       We prefer the maximal string.  We set buf[0] earlier, and we
+       know of no implementation that modifies buf to be an
+       unterminated string, so this strlen should be portable in
+       practice (rather than pulling in a safer strnlen).  */
+    if (ret == ERANGE && strlen (buf) < buflen - 1)
+      {
+        char stackbuf[STACKBUF_LEN];
+
+        /* STACKBUF_LEN should have been large enough.  */
+        if (strerror_r (errnum, stackbuf, sizeof stackbuf) == ERANGE)
+          abort ();
+        safe_copy (buf, buflen, stackbuf);
+      }
+# endif
+
+#else /* USE_SYSTEM_STRERROR */
+
+    /* Try to do what strerror (errnum) does, but without clobbering the
+       buffer used by strerror().  */
+
+# if defined __NetBSD__ || defined __hpux || (defined _WIN32 && !defined __CYGWIN__) || defined __CYGWIN__ /* NetBSD, HP-UX, native Windows, Cygwin */
+
+    /* NetBSD:         sys_nerr, sys_errlist are declared through _NETBSD_SOURCE
+                       and <errno.h> above.
+       HP-UX:          sys_nerr, sys_errlist are declared explicitly above.
+       native Windows: sys_nerr, sys_errlist are declared in <stdlib.h>.
+       Cygwin:         sys_nerr, sys_errlist are declared in <errno.h>.  */
+    if (errnum >= 0 && errnum < sys_nerr)
+      {
+#  if HAVE_CATGETS && (defined __NetBSD__ || defined __hpux)
+#   if defined __NetBSD__
+        nl_catd catd = catopen ("libc", NL_CAT_LOCALE);
+        const char *errmsg =
+          (catd != (nl_catd)-1
+           ? catgets (catd, 1, errnum, sys_errlist[errnum])
+           : sys_errlist[errnum]);
+#   endif
+#   if defined __hpux
+        nl_catd catd = catopen ("perror", NL_CAT_LOCALE);
+        const char *errmsg =
+          (catd != (nl_catd)-1
+           ? catgets (catd, 1, 1 + errnum, sys_errlist[errnum])
+           : sys_errlist[errnum]);
+#   endif
+#  else
+        const char *errmsg = sys_errlist[errnum];
+#  endif
+        if (errmsg == NULL || *errmsg == '\0')
+          ret = EINVAL;
+        else
+          ret = safe_copy (buf, buflen, errmsg);
+#  if HAVE_CATGETS && (defined __NetBSD__ || defined __hpux)
+        if (catd != (nl_catd)-1)
+          catclose (catd);
+#  endif
+      }
+    else
+      ret = EINVAL;
+
+# elif defined __sgi || (defined __sun && !defined _LP64) /* IRIX, Solaris <= 9 32-bit */
+
+    /* For a valid error number, the system's strerror() function returns
+       a pointer to a not copied string, not to a buffer.  */
+    if (errnum >= 0 && errnum < sys_nerr)
+      {
+        char *errmsg = strerror (errnum);
+
+        if (errmsg == NULL || *errmsg == '\0')
+          ret = EINVAL;
+        else
+          ret = safe_copy (buf, buflen, errmsg);
+      }
+    else
+      ret = EINVAL;
+
+# else
+
+    gl_lock_lock (strerror_lock);
+
+    {
+      char *errmsg = strerror (errnum);
+
+      /* For invalid error numbers, strerror() on
+           - IRIX 6.5 returns NULL,
+           - HP-UX 11 returns an empty string.  */
+      if (errmsg == NULL || *errmsg == '\0')
+        ret = EINVAL;
+      else
+        ret = safe_copy (buf, buflen, errmsg);
+    }
+
+    gl_lock_unlock (strerror_lock);
+
+# endif
+
+#endif
+
+#if defined _WIN32 && !defined __CYGWIN__
+    /* MSVC 14 defines names for many error codes in the range 100..140,
+       but _sys_errlist contains strings only for the error codes
+       < _sys_nerr = 43.  */
+    if (ret == EINVAL)
+      {
+        const char *errmsg;
+
+        switch (errnum)
+          {
+          case 100 /* EADDRINUSE */:
+            errmsg = "Address already in use";
+            break;
+          case 101 /* EADDRNOTAVAIL */:
+            errmsg = "Cannot assign requested address";
+            break;
+          case 102 /* EAFNOSUPPORT */:
+            errmsg = "Address family not supported by protocol";
+            break;
+          case 103 /* EALREADY */:
+            errmsg = "Operation already in progress";
+            break;
+          case 105 /* ECANCELED */:
+            errmsg = "Operation canceled";
+            break;
+          case 106 /* ECONNABORTED */:
+            errmsg = "Software caused connection abort";
+            break;
+          case 107 /* ECONNREFUSED */:
+            errmsg = "Connection refused";
+            break;
+          case 108 /* ECONNRESET */:
+            errmsg = "Connection reset by peer";
+            break;
+          case 109 /* EDESTADDRREQ */:
+            errmsg = "Destination address required";
+            break;
+          case 110 /* EHOSTUNREACH */:
+            errmsg = "No route to host";
+            break;
+          case 112 /* EINPROGRESS */:
+            errmsg = "Operation now in progress";
+            break;
+          case 113 /* EISCONN */:
+            errmsg = "Transport endpoint is already connected";
+            break;
+          case 114 /* ELOOP */:
+            errmsg = "Too many levels of symbolic links";
+            break;
+          case 115 /* EMSGSIZE */:
+            errmsg = "Message too long";
+            break;
+          case 116 /* ENETDOWN */:
+            errmsg = "Network is down";
+            break;
+          case 117 /* ENETRESET */:
+            errmsg = "Network dropped connection on reset";
+            break;
+          case 118 /* ENETUNREACH */:
+            errmsg = "Network is unreachable";
+            break;
+          case 119 /* ENOBUFS */:
+            errmsg = "No buffer space available";
+            break;
+          case 123 /* ENOPROTOOPT */:
+            errmsg = "Protocol not available";
+            break;
+          case 126 /* ENOTCONN */:
+            errmsg = "Transport endpoint is not connected";
+            break;
+          case 128 /* ENOTSOCK */:
+            errmsg = "Socket operation on non-socket";
+            break;
+          case 129 /* ENOTSUP */:
+            errmsg = "Not supported";
+            break;
+          case 130 /* EOPNOTSUPP */:
+            errmsg = "Operation not supported";
+            break;
+          case 132 /* EOVERFLOW */:
+            errmsg = "Value too large for defined data type";
+            break;
+          case 133 /* EOWNERDEAD */:
+            errmsg = "Owner died";
+            break;
+          case 134 /* EPROTO */:
+            errmsg = "Protocol error";
+            break;
+          case 135 /* EPROTONOSUPPORT */:
+            errmsg = "Protocol not supported";
+            break;
+          case 136 /* EPROTOTYPE */:
+            errmsg = "Protocol wrong type for socket";
+            break;
+          case 138 /* ETIMEDOUT */:
+            errmsg = "Connection timed out";
+            break;
+          case 140 /* EWOULDBLOCK */:
+            errmsg = "Operation would block";
+            break;
+          default:
+            errmsg = NULL;
+            break;
+          }
+        if (errmsg != NULL)
+          ret = safe_copy (buf, buflen, errmsg);
+      }
+#endif
+
+    if (ret == EINVAL && !*buf)
+      {
+#if defined __HAIKU__
+        /* For consistency with perror().  */
+        snprintf (buf, buflen, "Unknown Application Error (%d)", errnum);
+#else
+        snprintf (buf, buflen, "Unknown error %d", errnum);
+#endif
+      }
+
+    errno = saved_errno;
+    return ret;
+  }
+}
diff --git a/src/grep/gnulib-tests/symlink.c b/src/grep/gnulib-tests/symlink.c
new file mode 100644
index 0000000..6e48898
--- /dev/null
+++ b/src/grep/gnulib-tests/symlink.c
@@ -0,0 +1,57 @@
+/* Stub for symlink().
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+#include <errno.h>
+#include <string.h>
+#include <sys/stat.h>
+
+
+#if HAVE_SYMLINK
+
+# undef symlink
+
+/* Create a symlink, but reject trailing slash.  */
+int
+rpl_symlink (char const *contents, char const *name)
+{
+  size_t len = strlen (name);
+  if (len && name[len - 1] == '/')
+    {
+      struct stat st;
+      if (lstat (name, &st) == 0 || errno == EOVERFLOW)
+        errno = EEXIST;
+      return -1;
+    }
+  return symlink (contents, name);
+}
+
+#else /* !HAVE_SYMLINK */
+
+/* The system does not support symlinks.  */
+int
+symlink (char const *contents _GL_UNUSED,
+         char const *name _GL_UNUSED)
+{
+  errno = ENOSYS;
+  return -1;
+}
+
+#endif /* !HAVE_SYMLINK */
diff --git a/src/grep/gnulib-tests/sys_ioctl.in.h b/src/grep/gnulib-tests/sys_ioctl.in.h
new file mode 100644
index 0000000..f1b2a1b
--- /dev/null
+++ b/src/grep/gnulib-tests/sys_ioctl.in.h
@@ -0,0 +1,79 @@
+/* Substitute for and wrapper around <sys/ioctl.h>.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _@GUARD_PREFIX@_SYS_IOCTL_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard.  */
+#if @HAVE_SYS_IOCTL_H@
+# @INCLUDE_NEXT@ @NEXT_SYS_IOCTL_H@
+#endif
+
+#ifndef _@GUARD_PREFIX@_SYS_IOCTL_H
+#define _@GUARD_PREFIX@_SYS_IOCTL_H
+
+/* AIX 5.1 and Solaris 10 declare ioctl() in <unistd.h> and in <stropts.h>,
+   but not in <sys/ioctl.h>.
+   Haiku declares ioctl() in <unistd.h>, but not in <sys/ioctl.h>.
+   But avoid namespace pollution on glibc systems.  */
+#ifndef __GLIBC__
+# include <unistd.h>
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+
+/* Declare overridden functions.  */
+
+#if @GNULIB_IOCTL@
+# if @REPLACE_IOCTL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef ioctl
+#   define ioctl rpl_ioctl
+#  endif
+_GL_FUNCDECL_RPL (ioctl, int,
+                  (int fd, int request, ... /* {void *,char *} arg */));
+_GL_CXXALIAS_RPL (ioctl, int,
+                  (int fd, int request, ... /* {void *,char *} arg */));
+# else
+#  if @SYS_IOCTL_H_HAVE_WINSOCK2_H@ || 1
+_GL_FUNCDECL_SYS (ioctl, int,
+                  (int fd, int request, ... /* {void *,char *} arg */));
+#  endif
+_GL_CXXALIAS_SYS (ioctl, int,
+                  (int fd, int request, ... /* {void *,char *} arg */));
+# endif
+_GL_CXXALIASWARN (ioctl);
+#elif @SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
+# undef ioctl
+# define ioctl ioctl_used_without_requesting_gnulib_module_ioctl
+#elif defined GNULIB_POSIXCHECK
+# undef ioctl
+# if HAVE_RAW_DECL_IOCTL
+_GL_WARN_ON_USE (ioctl, "ioctl does not portably work on sockets - "
+                 "use gnulib module ioctl for portability");
+# endif
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_SYS_IOCTL_H */
+#endif /* _@GUARD_PREFIX@_SYS_IOCTL_H */
diff --git a/src/grep/gnulib-tests/sys_select.in.h b/src/grep/gnulib-tests/sys_select.in.h
new file mode 100644
index 0000000..f8ef648
--- /dev/null
+++ b/src/grep/gnulib-tests/sys_select.in.h
@@ -0,0 +1,326 @@
+/* Substitute for <sys/select.h>.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+# if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+# endif
+@PRAGMA_COLUMNS@
+
+/* On OSF/1 and Solaris 2.6, <sys/types.h> and <sys/time.h>
+   both include <sys/select.h>.
+   On Cygwin, <sys/time.h> includes <sys/select.h>.
+   Simply delegate to the system's header in this case.  */
+#if (@HAVE_SYS_SELECT_H@                                                \
+     && !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H             \
+     && ((defined __osf__ && defined _SYS_TYPES_H_                      \
+          && defined _OSF_SOURCE)                                       \
+         || (defined __sun && defined _SYS_TYPES_H                      \
+             && (! (defined _XOPEN_SOURCE || defined _POSIX_C_SOURCE)   \
+                 || defined __EXTENSIONS__))))
+
+# define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H
+# @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
+
+#elif (@HAVE_SYS_SELECT_H@                                              \
+       && (defined _CYGWIN_SYS_TIME_H                                   \
+           || (!defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H       \
+               && ((defined __osf__ && defined _SYS_TIME_H_             \
+                    && defined _OSF_SOURCE)                             \
+                   || (defined __sun && defined _SYS_TIME_H             \
+                       && (! (defined _XOPEN_SOURCE                     \
+                              || defined _POSIX_C_SOURCE)               \
+                           || defined __EXTENSIONS__))))))
+
+# define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H
+# @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
+
+/* On IRIX 6.5, <sys/timespec.h> includes <sys/types.h>, which includes
+   <sys/bsd_types.h>, which includes <sys/select.h>.  At this point we cannot
+   include <signal.h>, because that includes <internal/signal_core.h>, which
+   gives a syntax error because <sys/timespec.h> has not been completely
+   processed.  Simply delegate to the system's header in this case.  */
+#elif @HAVE_SYS_SELECT_H@ && defined __sgi && (defined _SYS_BSD_TYPES_H && !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_BSD_TYPES_H)
+
+# define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_BSD_TYPES_H
+# @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
+
+/* On OpenBSD 5.0, <pthread.h> includes <sys/types.h>, which includes
+   <sys/select.h>.  At this point we cannot include <signal.h>, because that
+   includes gnulib's pthread.h override, which gives a syntax error because
+   /usr/include/pthread.h has not been completely processed.  Simply delegate
+   to the system's header in this case.  */
+#elif @HAVE_SYS_SELECT_H@ && defined __OpenBSD__ && (defined _PTHREAD_H_ && !defined PTHREAD_MUTEX_INITIALIZER)
+
+# @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
+
+#else
+
+#ifndef _@GUARD_PREFIX@_SYS_SELECT_H
+
+/* On many platforms, <sys/select.h> assumes prior inclusion of
+   <sys/types.h>.  Also, mingw defines sigset_t there, instead of
+   in <signal.h> where it belongs.  */
+#include <sys/types.h>
+
+#if @HAVE_SYS_SELECT_H@
+
+/* On OSF/1 4.0, <sys/select.h> provides only a forward declaration
+   of 'struct timeval', and no definition of this type.
+   Also, Mac OS X, AIX, HP-UX, IRIX, Solaris, Interix declare select()
+   in <sys/time.h>.
+   But avoid namespace pollution on glibc systems and "unknown type
+   name" problems on Cygwin.  */
+# if !(defined __GLIBC__ || defined __CYGWIN__)
+#  include <sys/time.h>
+# endif
+
+/* On AIX 7 and Solaris 10, <sys/select.h> provides an FD_ZERO implementation
+   that relies on memset(), but without including <string.h>.
+   But in any case avoid namespace pollution on glibc systems.  */
+# if (defined __OpenBSD__ || defined _AIX || defined __sun || defined __osf__ || defined __BEOS__) \
+     && ! defined __GLIBC__
+#  include <string.h>
+# endif
+
+/* The include_next requires a split double-inclusion guard.  */
+# @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
+
+#endif
+
+/* Get definition of 'sigset_t'.
+   But avoid namespace pollution on glibc systems and "unknown type
+   name" problems on Cygwin.
+   On OS/2 kLIBC, sigset_t is defined in <sys/select.h>, too. In addition,
+   if <sys/param.h> is included, <types.h> -> <sys/types.h> -> <sys/select.h>
+   are included. Then <signal.h> -> <pthread.h> are included by GNULIB. By the
+   way, <pthread.h> requires PAGE_SIZE defined in <sys/param.h>. However,
+   <sys/param.h> has not been processed, yet. As a result, 'PAGE_SIZE'
+   undeclared error occurs in <pthread.h>.
+   Do this after the include_next (for the sake of OpenBSD 5.0) but before
+   the split double-inclusion guard (for the sake of Solaris).  */
+#if !((defined __GLIBC__ || defined __CYGWIN__ || defined __KLIBC__) \
+      && !defined __UCLIBC__)
+# include <signal.h>
+#endif
+
+#ifndef _@GUARD_PREFIX@_SYS_SELECT_H
+#define _@GUARD_PREFIX@_SYS_SELECT_H
+
+#if !@HAVE_SYS_SELECT_H@
+/* A platform that lacks <sys/select.h>.  */
+/* Get the 'struct timeval' and 'fd_set' types and the FD_* macros
+   on most platforms.  */
+# include <sys/time.h>
+/* On HP-UX 11, <sys/time.h> provides an FD_ZERO implementation
+   that relies on memset(), but without including <string.h>.  */
+# if defined __hpux
+#  include <string.h>
+# endif
+/* On native Windows platforms:
+   Get the 'fd_set' type.
+   Get the close() declaration before we override it.  */
+# if @HAVE_WINSOCK2_H@
+#  if !defined _GL_INCLUDING_WINSOCK2_H
+#   define _GL_INCLUDING_WINSOCK2_H
+#   include <winsock2.h>
+#   undef _GL_INCLUDING_WINSOCK2_H
+#  endif
+#  include <io.h>
+# endif
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+
+/* Fix some definitions from <winsock2.h>.  */
+
+#if @HAVE_WINSOCK2_H@
+
+# if !GNULIB_defined_rpl_fd_isset
+
+/* Re-define FD_ISSET to avoid a WSA call while we are not using
+   network sockets.  */
+static int
+rpl_fd_isset (SOCKET fd, fd_set * set)
+{
+  u_int i;
+  if (set == NULL)
+    return 0;
+
+  for (i = 0; i < set->fd_count; i++)
+    if (set->fd_array[i] == fd)
+      return 1;
+
+  return 0;
+}
+
+#  define GNULIB_defined_rpl_fd_isset 1
+# endif
+
+# undef FD_ISSET
+# define FD_ISSET(fd, set) rpl_fd_isset(fd, set)
+
+#endif
+
+/* Hide some function declarations from <winsock2.h>.  */
+
+#if @HAVE_WINSOCK2_H@
+# if !defined _@GUARD_PREFIX@_UNISTD_H
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef close
+#   define close close_used_without_including_unistd_h
+#  elif !defined __clang__
+    _GL_WARN_ON_USE (close,
+                     "close() used without including <unistd.h>");
+#  endif
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef gethostname
+#   define gethostname gethostname_used_without_including_unistd_h
+#  elif !defined __clang__
+    _GL_WARN_ON_USE (gethostname,
+                     "gethostname() used without including <unistd.h>");
+#  endif
+# endif
+# if !defined _@GUARD_PREFIX@_SYS_SOCKET_H
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef socket
+#   define socket              socket_used_without_including_sys_socket_h
+#   undef connect
+#   define connect             connect_used_without_including_sys_socket_h
+#   undef accept
+#   define accept              accept_used_without_including_sys_socket_h
+#   undef bind
+#   define bind                bind_used_without_including_sys_socket_h
+#   undef getpeername
+#   define getpeername         getpeername_used_without_including_sys_socket_h
+#   undef getsockname
+#   define getsockname         getsockname_used_without_including_sys_socket_h
+#   undef getsockopt
+#   define getsockopt          getsockopt_used_without_including_sys_socket_h
+#   undef listen
+#   define listen              listen_used_without_including_sys_socket_h
+#   undef recv
+#   define recv                recv_used_without_including_sys_socket_h
+#   undef send
+#   define send                send_used_without_including_sys_socket_h
+#   undef recvfrom
+#   define recvfrom            recvfrom_used_without_including_sys_socket_h
+#   undef sendto
+#   define sendto              sendto_used_without_including_sys_socket_h
+#   undef setsockopt
+#   define setsockopt          setsockopt_used_without_including_sys_socket_h
+#   undef shutdown
+#   define shutdown            shutdown_used_without_including_sys_socket_h
+#  elif !defined __clang__
+    _GL_WARN_ON_USE (socket,
+                     "socket() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (connect,
+                     "connect() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (accept,
+                     "accept() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (bind,
+                     "bind() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (getpeername,
+                     "getpeername() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (getsockname,
+                     "getsockname() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (getsockopt,
+                     "getsockopt() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (listen,
+                     "listen() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (recv,
+                     "recv() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (send,
+                     "send() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (recvfrom,
+                     "recvfrom() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (sendto,
+                     "sendto() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (setsockopt,
+                     "setsockopt() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (shutdown,
+                     "shutdown() used without including <sys/socket.h>");
+#  endif
+# endif
+#endif
+
+
+#if @GNULIB_PSELECT@
+# if @REPLACE_PSELECT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pselect
+#   define pselect rpl_pselect
+#  endif
+_GL_FUNCDECL_RPL (pselect, int,
+                  (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
+                   struct timespec const *restrict, const sigset_t *restrict));
+_GL_CXXALIAS_RPL (pselect, int,
+                  (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
+                   struct timespec const *restrict, const sigset_t *restrict));
+# else
+#  if !@HAVE_PSELECT@
+_GL_FUNCDECL_SYS (pselect, int,
+                  (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
+                   struct timespec const *restrict, const sigset_t *restrict));
+#  endif
+_GL_CXXALIAS_SYS (pselect, int,
+                  (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
+                   struct timespec const *restrict, const sigset_t *restrict));
+# endif
+_GL_CXXALIASWARN (pselect);
+#elif defined GNULIB_POSIXCHECK
+# undef pselect
+# if HAVE_RAW_DECL_PSELECT
+_GL_WARN_ON_USE (pselect, "pselect is not portable - "
+                 "use gnulib module pselect for portability");
+# endif
+#endif
+
+#if @GNULIB_SELECT@
+# if @REPLACE_SELECT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef select
+#   define select rpl_select
+#  endif
+_GL_FUNCDECL_RPL (select, int,
+                  (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
+                   struct timeval *restrict));
+_GL_CXXALIAS_RPL (select, int,
+                  (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
+                   timeval *restrict));
+# else
+_GL_CXXALIAS_SYS (select, int,
+                  (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
+                   timeval *restrict));
+# endif
+_GL_CXXALIASWARN (select);
+#elif @HAVE_WINSOCK2_H@
+# undef select
+# define select select_used_without_requesting_gnulib_module_select
+#elif defined GNULIB_POSIXCHECK
+# undef select
+# if HAVE_RAW_DECL_SELECT
+_GL_WARN_ON_USE (select, "select is not always POSIX compliant - "
+                 "use gnulib module select for portability");
+# endif
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_SYS_SELECT_H */
+#endif /* _@GUARD_PREFIX@_SYS_SELECT_H */
+#endif /* OSF/1 */
diff --git a/src/grep/gnulib-tests/sys_socket.c b/src/grep/gnulib-tests/sys_socket.c
new file mode 100644
index 0000000..d90b32c
--- /dev/null
+++ b/src/grep/gnulib-tests/sys_socket.c
@@ -0,0 +1,22 @@
+/* Inline functions for <sys/socket.h>.
+
+   Copyright (C) 2012-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#define _GL_SYS_SOCKET_INLINE _GL_EXTERN_INLINE
+#include "sys/socket.h"
+typedef int dummy;
diff --git a/src/grep/gnulib-tests/sys_socket.in.h b/src/grep/gnulib-tests/sys_socket.in.h
new file mode 100644
index 0000000..0a2c57d
--- /dev/null
+++ b/src/grep/gnulib-tests/sys_socket.in.h
@@ -0,0 +1,734 @@
+/* Provide a sys/socket header file for systems lacking it (read: MinGW)
+   and for systems where it is incomplete.
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+   Written by Simon Josefsson.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* This file is supposed to be used on platforms that lack <sys/socket.h>,
+   on platforms where <sys/socket.h> cannot be included standalone, and on
+   platforms where <sys/socket.h> does not provide all necessary definitions.
+   It is intended to provide definitions and prototypes needed by an
+   application.  */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if defined _GL_ALREADY_INCLUDING_SYS_SOCKET_H
+/* Special invocation convention:
+   - On Cygwin 1.5.x we have a sequence of nested includes
+     <sys/socket.h> -> <cygwin/socket.h> -> <asm/socket.h> -> <cygwin/if.h>,
+     and the latter includes <sys/socket.h>.  In this situation, the functions
+     are not yet declared, therefore we cannot provide the C++ aliases.  */
+
+#@INCLUDE_NEXT@ @NEXT_SYS_SOCKET_H@
+
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_SYS_SOCKET_H
+
+#if @HAVE_SYS_SOCKET_H@
+
+# define _GL_ALREADY_INCLUDING_SYS_SOCKET_H
+
+/* On many platforms, <sys/socket.h> assumes prior inclusion of
+   <sys/types.h>.  */
+# include <sys/types.h>
+
+/* On FreeBSD 6.4, <sys/socket.h> defines some macros that assume that NULL
+   is defined.  */
+# include <stddef.h>
+
+/* The include_next requires a split double-inclusion guard.  */
+# @INCLUDE_NEXT@ @NEXT_SYS_SOCKET_H@
+
+# undef _GL_ALREADY_INCLUDING_SYS_SOCKET_H
+
+#endif
+
+#ifndef _@GUARD_PREFIX@_SYS_SOCKET_H
+#define _@GUARD_PREFIX@_SYS_SOCKET_H
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef _GL_SYS_SOCKET_INLINE
+# define _GL_SYS_SOCKET_INLINE _GL_INLINE
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+#if !@HAVE_SA_FAMILY_T@
+# if !GNULIB_defined_sa_family_t
+/* On OS/2 kLIBC, sa_family_t is unsigned char unless TCPV40HDRS is defined. */
+#  if !defined __KLIBC__ || defined TCPV40HDRS
+typedef unsigned short  sa_family_t;
+#  else
+typedef unsigned char   sa_family_t;
+#  endif
+#  define GNULIB_defined_sa_family_t 1
+# endif
+#endif
+
+#if @HAVE_STRUCT_SOCKADDR_STORAGE@
+/* Make the 'struct sockaddr_storage' field 'ss_family' visible on AIX 7.1.  */
+# if !@HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY@
+#  ifndef ss_family
+#   define ss_family __ss_family
+#  endif
+# endif
+#else
+# include <stdalign.h>
+/* Code taken from glibc sysdeps/unix/sysv/linux/bits/socket.h on
+   2009-05-08, licensed under LGPLv2.1+, plus portability fixes. */
+# define __ss_aligntype unsigned long int
+# define _SS_SIZE 256
+# define _SS_PADSIZE \
+    (_SS_SIZE - ((sizeof (sa_family_t) >= alignof (__ss_aligntype)      \
+                  ? sizeof (sa_family_t)                                \
+                  : alignof (__ss_aligntype))                           \
+                 + sizeof (__ss_aligntype)))
+
+# if !GNULIB_defined_struct_sockaddr_storage
+struct sockaddr_storage
+{
+  sa_family_t ss_family;      /* Address family, etc.  */
+  __ss_aligntype __ss_align;  /* Force desired alignment.  */
+  char __ss_padding[_SS_PADSIZE];
+};
+#  define GNULIB_defined_struct_sockaddr_storage 1
+# endif
+
+#endif
+
+/* Get struct iovec.  */
+/* But avoid namespace pollution on glibc systems.  */
+#if ! defined __GLIBC__
+# include <sys/uio.h>
+#endif
+
+#if @HAVE_SYS_SOCKET_H@
+
+/* A platform that has <sys/socket.h>.  */
+
+/* For shutdown().  */
+# if !defined SHUT_RD
+#  define SHUT_RD 0
+# endif
+# if !defined SHUT_WR
+#  define SHUT_WR 1
+# endif
+# if !defined SHUT_RDWR
+#  define SHUT_RDWR 2
+# endif
+
+# ifdef __VMS                        /* OpenVMS */
+#  ifndef CMSG_SPACE
+#   define CMSG_SPACE(length) _CMSG_SPACE(length)
+#  endif
+#  ifndef CMSG_LEN
+#   define CMSG_LEN(length) _CMSG_LEN(length)
+#  endif
+# endif
+
+#else
+
+# ifdef __CYGWIN__
+#  error "Cygwin does have a sys/socket.h, doesn't it?!?"
+# endif
+
+/* A platform that lacks <sys/socket.h>.
+
+   Currently only MinGW is supported.  See the gnulib manual regarding
+   Windows sockets.  MinGW has the header files winsock2.h and
+   ws2tcpip.h that declare the sys/socket.h definitions we need.  Note
+   that you can influence which definitions you get by setting the
+   WINVER symbol before including these two files.  For example,
+   getaddrinfo is only available if _WIN32_WINNT >= 0x0501 (that
+   symbol is set indirectly through WINVER).  You can set this by
+   adding AC_DEFINE(WINVER, 0x0501) to configure.ac.  Note that your
+   code may not run on older Windows releases then.  My Windows 2000
+   box was not able to run the code, for example.  The situation is
+   slightly confusing because
+   <https://docs.microsoft.com/en-us/windows/desktop/api/ws2tcpip/nf-ws2tcpip-getaddrinfo>
+   suggests that getaddrinfo should be available on all Windows
+   releases. */
+
+# if @HAVE_WINSOCK2_H@
+#  include <winsock2.h>
+# endif
+# if @HAVE_WS2TCPIP_H@
+#  include <ws2tcpip.h>
+# endif
+
+/* For shutdown(). */
+# if !defined SHUT_RD && defined SD_RECEIVE
+#  define SHUT_RD SD_RECEIVE
+# endif
+# if !defined SHUT_WR && defined SD_SEND
+#  define SHUT_WR SD_SEND
+# endif
+# if !defined SHUT_RDWR && defined SD_BOTH
+#  define SHUT_RDWR SD_BOTH
+# endif
+
+# if @HAVE_WINSOCK2_H@
+/* Include headers needed by the emulation code.  */
+#  include <sys/types.h>
+#  include <io.h>
+/* If these headers don't define socklen_t, <config.h> does.  */
+# endif
+
+/* Rudimentary 'struct msghdr'; this works as long as you don't try to
+   access msg_control or msg_controllen.  */
+struct msghdr {
+  void *msg_name;
+  socklen_t msg_namelen;
+  struct iovec *msg_iov;
+  int msg_iovlen;
+  int msg_flags;
+};
+
+#endif
+
+/* Ensure SO_REUSEPORT is defined.  */
+/* For the subtle differences between SO_REUSEPORT and SO_REUSEADDR, see
+   https://stackoverflow.com/questions/14388706/socket-options-so-reuseaddr-and-so-reuseport-how-do-they-differ-do-they-mean-t
+   and https://lwn.net/Articles/542629/
+ */
+#ifndef SO_REUSEPORT
+# define SO_REUSEPORT SO_REUSEADDR
+#endif
+
+/* Fix some definitions from <winsock2.h>.  */
+
+#if @HAVE_WINSOCK2_H@
+
+# if !GNULIB_defined_rpl_fd_isset
+
+/* Re-define FD_ISSET to avoid a WSA call while we are not using
+   network sockets.  */
+_GL_SYS_SOCKET_INLINE int
+rpl_fd_isset (SOCKET fd, fd_set * set)
+{
+  u_int i;
+  if (set == NULL)
+    return 0;
+
+  for (i = 0; i < set->fd_count; i++)
+    if (set->fd_array[i] == fd)
+      return 1;
+
+  return 0;
+}
+
+#  define GNULIB_defined_rpl_fd_isset 1
+# endif
+
+# undef FD_ISSET
+# define FD_ISSET(fd, set) rpl_fd_isset(fd, set)
+
+#endif
+
+/* Hide some function declarations from <winsock2.h>.  */
+
+#if @HAVE_WINSOCK2_H@
+# if !defined _@GUARD_PREFIX@_UNISTD_H
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef close
+#   define close close_used_without_including_unistd_h
+#  elif !defined __clang__
+    _GL_WARN_ON_USE (close,
+                     "close() used without including <unistd.h>");
+#  endif
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef gethostname
+#   define gethostname gethostname_used_without_including_unistd_h
+#  else
+    _GL_WARN_ON_USE (gethostname,
+                     "gethostname() used without including <unistd.h>");
+#  endif
+# endif
+# if !defined _@GUARD_PREFIX@_SYS_SELECT_H
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef select
+#   define select select_used_without_including_sys_select_h
+#  else
+    _GL_WARN_ON_USE (select,
+                     "select() used without including <sys/select.h>");
+#  endif
+# endif
+#endif
+
+/* Wrap everything else to use libc file descriptors for sockets.  */
+
+#if @GNULIB_SOCKET@
+# if @HAVE_WINSOCK2_H@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef socket
+#   define socket rpl_socket
+#  endif
+_GL_FUNCDECL_RPL (socket, int, (int domain, int type, int protocol));
+_GL_CXXALIAS_RPL (socket, int, (int domain, int type, int protocol));
+# else
+_GL_CXXALIAS_SYS (socket, int, (int domain, int type, int protocol));
+# endif
+_GL_CXXALIASWARN (socket);
+#elif @HAVE_WINSOCK2_H@
+# undef socket
+# define socket socket_used_without_requesting_gnulib_module_socket
+#elif defined GNULIB_POSIXCHECK
+# undef socket
+# if HAVE_RAW_DECL_SOCKET
+_GL_WARN_ON_USE (socket, "socket is not always POSIX compliant - "
+                 "use gnulib module socket for portability");
+# endif
+#endif
+
+#if @GNULIB_CONNECT@
+# if @HAVE_WINSOCK2_H@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef connect
+#   define connect rpl_connect
+#  endif
+_GL_FUNCDECL_RPL (connect, int,
+                  (int fd, const struct sockaddr *addr, socklen_t addrlen)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (connect, int,
+                  (int fd, const struct sockaddr *addr, socklen_t addrlen));
+# else
+/* Need to cast, because on NonStop Kernel, the third parameter is
+                                                     size_t addrlen.  */
+_GL_CXXALIAS_SYS_CAST (connect, int,
+                       (int fd,
+                        const struct sockaddr *addr, socklen_t addrlen));
+# endif
+_GL_CXXALIASWARN (connect);
+#elif @HAVE_WINSOCK2_H@
+# undef connect
+# define connect socket_used_without_requesting_gnulib_module_connect
+#elif defined GNULIB_POSIXCHECK
+# undef connect
+# if HAVE_RAW_DECL_CONNECT
+_GL_WARN_ON_USE (connect, "connect is not always POSIX compliant - "
+                 "use gnulib module connect for portability");
+# endif
+#endif
+
+#if @GNULIB_ACCEPT@
+# if @HAVE_WINSOCK2_H@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef accept
+#   define accept rpl_accept
+#  endif
+_GL_FUNCDECL_RPL (accept, int,
+                  (int fd,
+                   struct sockaddr *restrict addr,
+                   socklen_t *restrict addrlen));
+_GL_CXXALIAS_RPL (accept, int,
+                  (int fd,
+                   struct sockaddr *restrict addr,
+                   socklen_t *restrict addrlen));
+# else
+/* Need to cast, because on Solaris 10 systems, the third parameter is
+                        void *addrlen.  */
+_GL_CXXALIAS_SYS_CAST (accept, int,
+                       (int fd,
+                        struct sockaddr *restrict addr,
+                        socklen_t *restrict addrlen));
+# endif
+_GL_CXXALIASWARN (accept);
+#elif @HAVE_WINSOCK2_H@
+# undef accept
+# define accept accept_used_without_requesting_gnulib_module_accept
+#elif defined GNULIB_POSIXCHECK
+# undef accept
+# if HAVE_RAW_DECL_ACCEPT
+_GL_WARN_ON_USE (accept, "accept is not always POSIX compliant - "
+                 "use gnulib module accept for portability");
+# endif
+#endif
+
+#if @GNULIB_BIND@
+# if @HAVE_WINSOCK2_H@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef bind
+#   define bind rpl_bind
+#  endif
+_GL_FUNCDECL_RPL (bind, int,
+                  (int fd, const struct sockaddr *addr, socklen_t addrlen)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (bind, int,
+                  (int fd, const struct sockaddr *addr, socklen_t addrlen));
+# else
+/* Need to cast, because on NonStop Kernel, the third parameter is
+                                                     size_t addrlen.  */
+_GL_CXXALIAS_SYS_CAST (bind, int,
+                       (int fd,
+                        const struct sockaddr *addr, socklen_t addrlen));
+# endif
+_GL_CXXALIASWARN (bind);
+#elif @HAVE_WINSOCK2_H@
+# undef bind
+# define bind bind_used_without_requesting_gnulib_module_bind
+#elif defined GNULIB_POSIXCHECK
+# undef bind
+# if HAVE_RAW_DECL_BIND
+_GL_WARN_ON_USE (bind, "bind is not always POSIX compliant - "
+                 "use gnulib module bind for portability");
+# endif
+#endif
+
+#if @GNULIB_GETPEERNAME@
+# if @HAVE_WINSOCK2_H@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef getpeername
+#   define getpeername rpl_getpeername
+#  endif
+_GL_FUNCDECL_RPL (getpeername, int,
+                  (int fd, struct sockaddr *restrict addr,
+                   socklen_t *restrict addrlen)
+                  _GL_ARG_NONNULL ((2, 3)));
+_GL_CXXALIAS_RPL (getpeername, int,
+                  (int fd, struct sockaddr *restrict addr,
+                   socklen_t *restrict addrlen));
+# else
+/* Need to cast, because on Solaris 10 systems, the third parameter is
+                        void *addrlen.  */
+_GL_CXXALIAS_SYS_CAST (getpeername, int,
+                       (int fd, struct sockaddr *restrict addr,
+                        socklen_t *restrict addrlen));
+# endif
+_GL_CXXALIASWARN (getpeername);
+#elif @HAVE_WINSOCK2_H@
+# undef getpeername
+# define getpeername getpeername_used_without_requesting_gnulib_module_getpeername
+#elif defined GNULIB_POSIXCHECK
+# undef getpeername
+# if HAVE_RAW_DECL_GETPEERNAME
+_GL_WARN_ON_USE (getpeername, "getpeername is not always POSIX compliant - "
+                 "use gnulib module getpeername for portability");
+# endif
+#endif
+
+#if @GNULIB_GETSOCKNAME@
+# if @HAVE_WINSOCK2_H@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef getsockname
+#   define getsockname rpl_getsockname
+#  endif
+_GL_FUNCDECL_RPL (getsockname, int,
+                  (int fd, struct sockaddr *restrict addr,
+                   socklen_t *restrict addrlen)
+                  _GL_ARG_NONNULL ((2, 3)));
+_GL_CXXALIAS_RPL (getsockname, int,
+                  (int fd, struct sockaddr *restrict addr,
+                   socklen_t *restrict addrlen));
+# else
+/* Need to cast, because on Solaris 10 systems, the third parameter is
+                        void *addrlen.  */
+_GL_CXXALIAS_SYS_CAST (getsockname, int,
+                       (int fd, struct sockaddr *restrict addr,
+                        socklen_t *restrict addrlen));
+# endif
+_GL_CXXALIASWARN (getsockname);
+#elif @HAVE_WINSOCK2_H@
+# undef getsockname
+# define getsockname getsockname_used_without_requesting_gnulib_module_getsockname
+#elif defined GNULIB_POSIXCHECK
+# undef getsockname
+# if HAVE_RAW_DECL_GETSOCKNAME
+_GL_WARN_ON_USE (getsockname, "getsockname is not always POSIX compliant - "
+                 "use gnulib module getsockname for portability");
+# endif
+#endif
+
+#if @GNULIB_GETSOCKOPT@
+# if @HAVE_WINSOCK2_H@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef getsockopt
+#   define getsockopt rpl_getsockopt
+#  endif
+_GL_FUNCDECL_RPL (getsockopt, int,
+                  (int fd, int level, int optname,
+                   void *restrict optval, socklen_t *restrict optlen)
+                  _GL_ARG_NONNULL ((4, 5)));
+_GL_CXXALIAS_RPL (getsockopt, int,
+                  (int fd, int level, int optname,
+                   void *restrict optval, socklen_t *restrict optlen));
+# else
+/* Need to cast, because on Solaris 10 systems, the fifth parameter is
+                                                       void *optlen.  */
+_GL_CXXALIAS_SYS_CAST (getsockopt, int,
+                       (int fd, int level, int optname,
+                        void *restrict optval, socklen_t *restrict optlen));
+# endif
+_GL_CXXALIASWARN (getsockopt);
+#elif @HAVE_WINSOCK2_H@
+# undef getsockopt
+# define getsockopt getsockopt_used_without_requesting_gnulib_module_getsockopt
+#elif defined GNULIB_POSIXCHECK
+# undef getsockopt
+# if HAVE_RAW_DECL_GETSOCKOPT
+_GL_WARN_ON_USE (getsockopt, "getsockopt is not always POSIX compliant - "
+                 "use gnulib module getsockopt for portability");
+# endif
+#endif
+
+#if @GNULIB_LISTEN@
+# if @HAVE_WINSOCK2_H@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef listen
+#   define listen rpl_listen
+#  endif
+_GL_FUNCDECL_RPL (listen, int, (int fd, int backlog));
+_GL_CXXALIAS_RPL (listen, int, (int fd, int backlog));
+# else
+_GL_CXXALIAS_SYS (listen, int, (int fd, int backlog));
+# endif
+_GL_CXXALIASWARN (listen);
+#elif @HAVE_WINSOCK2_H@
+# undef listen
+# define listen listen_used_without_requesting_gnulib_module_listen
+#elif defined GNULIB_POSIXCHECK
+# undef listen
+# if HAVE_RAW_DECL_LISTEN
+_GL_WARN_ON_USE (listen, "listen is not always POSIX compliant - "
+                 "use gnulib module listen for portability");
+# endif
+#endif
+
+#if @GNULIB_RECV@
+# if @HAVE_WINSOCK2_H@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef recv
+#   define recv rpl_recv
+#  endif
+_GL_FUNCDECL_RPL (recv, ssize_t, (int fd, void *buf, size_t len, int flags)
+                                 _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (recv, ssize_t, (int fd, void *buf, size_t len, int flags));
+# else
+/* Need to cast, because on HP-UX 11.31 the return type may be
+                             int,
+   depending on compiler options.  */
+_GL_CXXALIAS_SYS_CAST (recv, ssize_t, (int fd, void *buf, size_t len, int flags));
+# endif
+_GL_CXXALIASWARN (recv);
+#elif @HAVE_WINSOCK2_H@
+# undef recv
+# define recv recv_used_without_requesting_gnulib_module_recv
+#elif defined GNULIB_POSIXCHECK
+# undef recv
+# if HAVE_RAW_DECL_RECV
+_GL_WARN_ON_USE (recv, "recv is not always POSIX compliant - "
+                 "use gnulib module recv for portability");
+# endif
+#endif
+
+#if @GNULIB_SEND@
+# if @HAVE_WINSOCK2_H@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef send
+#   define send rpl_send
+#  endif
+_GL_FUNCDECL_RPL (send, ssize_t,
+                  (int fd, const void *buf, size_t len, int flags)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (send, ssize_t,
+                  (int fd, const void *buf, size_t len, int flags));
+# else
+/* Need to cast, because on HP-UX 11.31 the return type may be
+                             int,
+   depending on compiler options.  */
+_GL_CXXALIAS_SYS_CAST (send, ssize_t,
+                       (int fd, const void *buf, size_t len, int flags));
+# endif
+_GL_CXXALIASWARN (send);
+#elif @HAVE_WINSOCK2_H@
+# undef send
+# define send send_used_without_requesting_gnulib_module_send
+#elif defined GNULIB_POSIXCHECK
+# undef send
+# if HAVE_RAW_DECL_SEND
+_GL_WARN_ON_USE (send, "send is not always POSIX compliant - "
+                 "use gnulib module send for portability");
+# endif
+#endif
+
+#if @GNULIB_RECVFROM@
+# if @HAVE_WINSOCK2_H@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef recvfrom
+#   define recvfrom rpl_recvfrom
+#  endif
+_GL_FUNCDECL_RPL (recvfrom, ssize_t,
+                  (int fd, void *restrict buf, size_t len, int flags,
+                   struct sockaddr *restrict from,
+                   socklen_t *restrict fromlen)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (recvfrom, ssize_t,
+                  (int fd, void *restrict buf, size_t len, int flags,
+                   struct sockaddr *restrict from,
+                   socklen_t *restrict fromlen));
+# else
+/* Need to cast, because on Solaris 10 systems, the sixth parameter is
+                                               void *fromlen.  */
+_GL_CXXALIAS_SYS_CAST (recvfrom, ssize_t,
+                       (int fd, void *restrict buf, size_t len, int flags,
+                        struct sockaddr *restrict from,
+                        socklen_t *restrict fromlen));
+# endif
+_GL_CXXALIASWARN (recvfrom);
+#elif @HAVE_WINSOCK2_H@
+# undef recvfrom
+# define recvfrom recvfrom_used_without_requesting_gnulib_module_recvfrom
+#elif defined GNULIB_POSIXCHECK
+# undef recvfrom
+# if HAVE_RAW_DECL_RECVFROM
+_GL_WARN_ON_USE (recvfrom, "recvfrom is not always POSIX compliant - "
+                 "use gnulib module recvfrom for portability");
+# endif
+#endif
+
+#if @GNULIB_SENDTO@
+# if @HAVE_WINSOCK2_H@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef sendto
+#   define sendto rpl_sendto
+#  endif
+_GL_FUNCDECL_RPL (sendto, ssize_t,
+                  (int fd, const void *buf, size_t len, int flags,
+                   const struct sockaddr *to, socklen_t tolen)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (sendto, ssize_t,
+                  (int fd, const void *buf, size_t len, int flags,
+                   const struct sockaddr *to, socklen_t tolen));
+# else
+/* Need to cast, because on NonStop Kernel, the sixth parameter is
+                                                   size_t tolen.  */
+_GL_CXXALIAS_SYS_CAST (sendto, ssize_t,
+                       (int fd, const void *buf, size_t len, int flags,
+                        const struct sockaddr *to, socklen_t tolen));
+# endif
+_GL_CXXALIASWARN (sendto);
+#elif @HAVE_WINSOCK2_H@
+# undef sendto
+# define sendto sendto_used_without_requesting_gnulib_module_sendto
+#elif defined GNULIB_POSIXCHECK
+# undef sendto
+# if HAVE_RAW_DECL_SENDTO
+_GL_WARN_ON_USE (sendto, "sendto is not always POSIX compliant - "
+                 "use gnulib module sendto for portability");
+# endif
+#endif
+
+#if @GNULIB_SETSOCKOPT@
+# if @HAVE_WINSOCK2_H@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef setsockopt
+#   define setsockopt rpl_setsockopt
+#  endif
+_GL_FUNCDECL_RPL (setsockopt, int, (int fd, int level, int optname,
+                                    const void * optval, socklen_t optlen)
+                                   _GL_ARG_NONNULL ((4)));
+_GL_CXXALIAS_RPL (setsockopt, int, (int fd, int level, int optname,
+                                    const void * optval, socklen_t optlen));
+# else
+/* Need to cast, because on NonStop Kernel, the fifth parameter is
+                                             size_t optlen.  */
+_GL_CXXALIAS_SYS_CAST (setsockopt, int,
+                       (int fd, int level, int optname,
+                        const void * optval, socklen_t optlen));
+# endif
+_GL_CXXALIASWARN (setsockopt);
+#elif @HAVE_WINSOCK2_H@
+# undef setsockopt
+# define setsockopt setsockopt_used_without_requesting_gnulib_module_setsockopt
+#elif defined GNULIB_POSIXCHECK
+# undef setsockopt
+# if HAVE_RAW_DECL_SETSOCKOPT
+_GL_WARN_ON_USE (setsockopt, "setsockopt is not always POSIX compliant - "
+                 "use gnulib module setsockopt for portability");
+# endif
+#endif
+
+#if @GNULIB_SHUTDOWN@
+# if @HAVE_WINSOCK2_H@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef shutdown
+#   define shutdown rpl_shutdown
+#  endif
+_GL_FUNCDECL_RPL (shutdown, int, (int fd, int how));
+_GL_CXXALIAS_RPL (shutdown, int, (int fd, int how));
+# else
+_GL_CXXALIAS_SYS (shutdown, int, (int fd, int how));
+# endif
+_GL_CXXALIASWARN (shutdown);
+#elif @HAVE_WINSOCK2_H@
+# undef shutdown
+# define shutdown shutdown_used_without_requesting_gnulib_module_shutdown
+#elif defined GNULIB_POSIXCHECK
+# undef shutdown
+# if HAVE_RAW_DECL_SHUTDOWN
+_GL_WARN_ON_USE (shutdown, "shutdown is not always POSIX compliant - "
+                 "use gnulib module shutdown for portability");
+# endif
+#endif
+
+#if @GNULIB_ACCEPT4@
+/* Accept a connection on a socket, with specific opening flags.
+   The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
+   and O_TEXT, O_BINARY (defined in "binary-io.h").
+   See also the Linux man page at
+   <https://www.kernel.org/doc/man-pages/online/pages/man2/accept4.2.html>.  */
+# if @HAVE_ACCEPT4@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define accept4 rpl_accept4
+#  endif
+_GL_FUNCDECL_RPL (accept4, int,
+                  (int sockfd, struct sockaddr *addr, socklen_t *addrlen,
+                   int flags));
+_GL_CXXALIAS_RPL (accept4, int,
+                  (int sockfd, struct sockaddr *addr, socklen_t *addrlen,
+                   int flags));
+# else
+_GL_FUNCDECL_SYS (accept4, int,
+                  (int sockfd, struct sockaddr *addr, socklen_t *addrlen,
+                   int flags));
+_GL_CXXALIAS_SYS (accept4, int,
+                  (int sockfd, struct sockaddr *addr, socklen_t *addrlen,
+                   int flags));
+# endif
+_GL_CXXALIASWARN (accept4);
+#elif defined GNULIB_POSIXCHECK
+# undef accept4
+# if HAVE_RAW_DECL_ACCEPT4
+_GL_WARN_ON_USE (accept4, "accept4 is unportable - "
+                 "use gnulib module accept4 for portability");
+# endif
+#endif
+
+_GL_INLINE_HEADER_END
+
+#endif /* _@GUARD_PREFIX@_SYS_SOCKET_H */
+#endif /* _@GUARD_PREFIX@_SYS_SOCKET_H */
+#endif
diff --git a/src/grep/gnulib-tests/sys_time.in.h b/src/grep/gnulib-tests/sys_time.in.h
new file mode 100644
index 0000000..8035fbe
--- /dev/null
+++ b/src/grep/gnulib-tests/sys_time.in.h
@@ -0,0 +1,224 @@
+/* Provide a more complete sys/time.h.
+
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+#ifndef _@GUARD_PREFIX@_SYS_TIME_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* On Cygwin and on many BSDish systems, <sys/time.h> includes itself
+   recursively via <sys/select.h>.
+   Simply delegate to the system's header in this case; it is a no-op.
+   Without this extra ifdef, the C++ gettimeofday declaration below
+   would be a forward declaration in gnulib's nested <sys/time.h>.  */
+#if defined _CYGWIN_SYS_TIME_H || defined _SYS_TIME_H || defined _SYS_TIME_H_
+# @INCLUDE_NEXT@ @NEXT_SYS_TIME_H@
+#else
+
+/* The include_next requires a split double-inclusion guard.  */
+#if @HAVE_SYS_TIME_H@
+# @INCLUDE_NEXT@ @NEXT_SYS_TIME_H@
+#endif
+
+#ifndef _@GUARD_PREFIX@_SYS_TIME_H
+#define _@GUARD_PREFIX@_SYS_TIME_H
+
+#if ! @HAVE_SYS_TIME_H@
+# include <time.h>
+#endif
+
+/* On native Windows with MSVC, get the 'struct timeval' type.
+   Also, on native Windows with a 64-bit time_t, where we are overriding the
+   'struct timeval' type, get all declarations of system functions whose
+   signature contains 'struct timeval'.  */
+#if (defined _MSC_VER || @REPLACE_STRUCT_TIMEVAL@) && @HAVE_WINSOCK2_H@ && !defined _GL_INCLUDING_WINSOCK2_H
+# define _GL_INCLUDING_WINSOCK2_H
+# include <winsock2.h>
+# undef _GL_INCLUDING_WINSOCK2_H
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if !@HAVE_STRUCT_TIMEVAL@ || @REPLACE_STRUCT_TIMEVAL@
+
+# if @REPLACE_STRUCT_TIMEVAL@
+#  define timeval rpl_timeval
+# endif
+
+# if !GNULIB_defined_struct_timeval
+struct timeval
+{
+  time_t tv_sec;
+  long int tv_usec;
+};
+#  define GNULIB_defined_struct_timeval 1
+# endif
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#if @GNULIB_GETTIMEOFDAY@
+# if @REPLACE_GETTIMEOFDAY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef gettimeofday
+#   define gettimeofday rpl_gettimeofday
+#  endif
+_GL_FUNCDECL_RPL (gettimeofday, int,
+                  (struct timeval *restrict, void *restrict)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (gettimeofday, int,
+                  (struct timeval *restrict, void *restrict));
+# else
+#  if !@HAVE_GETTIMEOFDAY@
+_GL_FUNCDECL_SYS (gettimeofday, int,
+                  (struct timeval *restrict, void *restrict)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+/* Need to cast, because on glibc systems, by default, the second argument is
+                                                  struct timezone *.  */
+_GL_CXXALIAS_SYS_CAST (gettimeofday, int,
+                       (struct timeval *restrict, void *restrict));
+# endif
+_GL_CXXALIASWARN (gettimeofday);
+# if defined __cplusplus && defined GNULIB_NAMESPACE
+namespace GNULIB_NAMESPACE {
+  typedef ::timeval
+#  undef timeval
+    timeval;
+#  if @REPLACE_STRUCT_TIMEVAL@
+#   define timeval rpl_timeval
+  typedef ::timeval timeval;
+#  endif
+}
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef gettimeofday
+# if HAVE_RAW_DECL_GETTIMEOFDAY
+_GL_WARN_ON_USE (gettimeofday, "gettimeofday is unportable - "
+                 "use gnulib module gettimeofday for portability");
+# endif
+#endif
+
+/* Hide some function declarations from <winsock2.h>.  */
+
+#if defined _MSC_VER && @HAVE_WINSOCK2_H@
+# if !defined _@GUARD_PREFIX@_UNISTD_H
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef close
+#   define close close_used_without_including_unistd_h
+#  elif !defined __clang__
+     _GL_WARN_ON_USE (close,
+                      "close() used without including <unistd.h>");
+#  endif
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef gethostname
+#   define gethostname gethostname_used_without_including_unistd_h
+#  else
+     _GL_WARN_ON_USE (gethostname,
+                      "gethostname() used without including <unistd.h>");
+#  endif
+# endif
+# if !defined _@GUARD_PREFIX@_SYS_SOCKET_H
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef socket
+#   define socket              socket_used_without_including_sys_socket_h
+#   undef connect
+#   define connect             connect_used_without_including_sys_socket_h
+#   undef accept
+#   define accept              accept_used_without_including_sys_socket_h
+#   undef bind
+#   define bind                bind_used_without_including_sys_socket_h
+#   undef getpeername
+#   define getpeername         getpeername_used_without_including_sys_socket_h
+#   undef getsockname
+#   define getsockname         getsockname_used_without_including_sys_socket_h
+#   undef getsockopt
+#   define getsockopt          getsockopt_used_without_including_sys_socket_h
+#   undef listen
+#   define listen              listen_used_without_including_sys_socket_h
+#   undef recv
+#   define recv                recv_used_without_including_sys_socket_h
+#   undef send
+#   define send                send_used_without_including_sys_socket_h
+#   undef recvfrom
+#   define recvfrom            recvfrom_used_without_including_sys_socket_h
+#   undef sendto
+#   define sendto              sendto_used_without_including_sys_socket_h
+#   undef setsockopt
+#   define setsockopt          setsockopt_used_without_including_sys_socket_h
+#   undef shutdown
+#   define shutdown            shutdown_used_without_including_sys_socket_h
+#  else
+     _GL_WARN_ON_USE (socket,
+                      "socket() used without including <sys/socket.h>");
+     _GL_WARN_ON_USE (connect,
+                      "connect() used without including <sys/socket.h>");
+     _GL_WARN_ON_USE (accept,
+                      "accept() used without including <sys/socket.h>");
+     _GL_WARN_ON_USE (bind,
+                      "bind() used without including <sys/socket.h>");
+     _GL_WARN_ON_USE (getpeername,
+                      "getpeername() used without including <sys/socket.h>");
+     _GL_WARN_ON_USE (getsockname,
+                      "getsockname() used without including <sys/socket.h>");
+     _GL_WARN_ON_USE (getsockopt,
+                      "getsockopt() used without including <sys/socket.h>");
+     _GL_WARN_ON_USE (listen,
+                      "listen() used without including <sys/socket.h>");
+     _GL_WARN_ON_USE (recv,
+                      "recv() used without including <sys/socket.h>");
+     _GL_WARN_ON_USE (send,
+                      "send() used without including <sys/socket.h>");
+     _GL_WARN_ON_USE (recvfrom,
+                      "recvfrom() used without including <sys/socket.h>");
+     _GL_WARN_ON_USE (sendto,
+                      "sendto() used without including <sys/socket.h>");
+     _GL_WARN_ON_USE (setsockopt,
+                      "setsockopt() used without including <sys/socket.h>");
+     _GL_WARN_ON_USE (shutdown,
+                      "shutdown() used without including <sys/socket.h>");
+#  endif
+# endif
+# if !defined _@GUARD_PREFIX@_SYS_SELECT_H
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef select
+#   define select select_used_without_including_sys_select_h
+#  else
+     _GL_WARN_ON_USE (select,
+                      "select() used without including <sys/select.h>");
+#  endif
+# endif
+#endif
+
+#endif /* _@GUARD_PREFIX@_SYS_TIME_H */
+#endif /* _CYGWIN_SYS_TIME_H */
+#endif /* _@GUARD_PREFIX@_SYS_TIME_H */
diff --git a/src/grep/gnulib-tests/sys_uio.in.h b/src/grep/gnulib-tests/sys_uio.in.h
new file mode 100644
index 0000000..507ab01
--- /dev/null
+++ b/src/grep/gnulib-tests/sys_uio.in.h
@@ -0,0 +1,63 @@
+/* Substitute for <sys/uio.h>.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+# if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+# endif
+@PRAGMA_COLUMNS@
+
+#ifndef _@GUARD_PREFIX@_SYS_UIO_H
+
+#if @HAVE_SYS_UIO_H@
+
+/* On OpenBSD 4.4, <sys/uio.h> assumes prior inclusion of <sys/types.h>.  */
+# include <sys/types.h>
+
+/* The include_next requires a split double-inclusion guard.  */
+# @INCLUDE_NEXT@ @NEXT_SYS_UIO_H@
+
+#endif
+
+#ifndef _@GUARD_PREFIX@_SYS_UIO_H
+#define _@GUARD_PREFIX@_SYS_UIO_H
+
+#if !@HAVE_SYS_UIO_H@
+/* A platform that lacks <sys/uio.h>.  */
+/* Get 'size_t' and 'ssize_t'.  */
+# include <sys/types.h>
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+# if !GNULIB_defined_struct_iovec
+/* All known platforms that lack <sys/uio.h> also lack any declaration
+   of struct iovec in any other header.  */
+struct iovec {
+  void *iov_base;
+  size_t iov_len;
+};
+#  define GNULIB_defined_struct_iovec 1
+# endif
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+#endif /* _@GUARD_PREFIX@_SYS_UIO_H */
+#endif /* _@GUARD_PREFIX@_SYS_UIO_H */
diff --git a/src/grep/gnulib-tests/test-accept.c b/src/grep/gnulib-tests/test-accept.c
new file mode 100644
index 0000000..49b87b1
--- /dev/null
+++ b/src/grep/gnulib-tests/test-accept.c
@@ -0,0 +1,56 @@
+/* Test accepting a connection to a server socket.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (accept, int, (int, struct sockaddr *, socklen_t *));
+
+#include <errno.h>
+#include <netinet/in.h>
+#include <unistd.h>
+
+#include "sockets.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    struct sockaddr_in addr;
+    socklen_t addrlen = sizeof (addr);
+
+    errno = 0;
+    ASSERT (accept (-1, (struct sockaddr *) &addr, &addrlen) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    struct sockaddr_in addr;
+    socklen_t addrlen = sizeof (addr);
+
+    close (99);
+    errno = 0;
+    ASSERT (accept (99, (struct sockaddr *) &addr, &addrlen) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-alignof.c b/src/grep/gnulib-tests/test-alignof.c
new file mode 100644
index 0000000..593b608
--- /dev/null
+++ b/src/grep/gnulib-tests/test-alignof.c
@@ -0,0 +1,59 @@
+/* Test of <alignof.h>.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+#include <config.h>
+
+#include <alignof.h>
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "verify.h"
+
+typedef long double longdouble;
+typedef struct { char a[1]; } struct1;
+typedef struct { char a[2]; } struct2;
+typedef struct { char a[3]; } struct3;
+typedef struct { char a[4]; } struct4;
+
+#define CHECK(type) \
+  typedef struct { char slot1; type slot2; } type##_helper; \
+  verify (alignof_slot (type) == offsetof (type##_helper, slot2)); \
+  const int type##_slot_alignment = alignof_slot (type); \
+  const int type##_type_alignment = alignof_type (type);
+
+CHECK (char)
+CHECK (short)
+CHECK (int)
+CHECK (long)
+CHECK (float)
+CHECK (double)
+CHECK (longdouble)
+#ifdef INT64_MAX
+CHECK (int64_t)
+#endif
+CHECK (struct1)
+CHECK (struct2)
+CHECK (struct3)
+CHECK (struct4)
+
+int
+main ()
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-alloca-opt.c b/src/grep/gnulib-tests/test-alloca-opt.c
new file mode 100644
index 0000000..fdbf6f5
--- /dev/null
+++ b/src/grep/gnulib-tests/test-alloca-opt.c
@@ -0,0 +1,62 @@
+/* Test of optional automatic memory allocation.
+   Copyright (C) 2005, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <alloca.h>
+
+#if HAVE_ALLOCA
+
+static void
+do_allocation (int n)
+{
+  void *volatile ptr = alloca (n);
+  (void) ptr;
+}
+
+void (*func) (int) = do_allocation;
+
+#endif
+
+int
+main ()
+{
+#if HAVE_ALLOCA
+  int i;
+
+  /* Repeat a lot of times, to make sure there's no memory leak.  */
+  for (i = 0; i < 100000; i++)
+    {
+      /* Try various values.
+         n = 0 gave a crash on Alpha with gcc-2.5.8.
+         Some versions of Mac OS X have a stack size limit of 512 KB.  */
+      func (34);
+      func (134);
+      func (399);
+      func (510823);
+      func (129321);
+      func (0);
+      func (4070);
+      func (4095);
+      func (1);
+      func (16582);
+    }
+#endif
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-argmatch.c b/src/grep/gnulib-tests/test-argmatch.c
new file mode 100644
index 0000000..ef10536
--- /dev/null
+++ b/src/grep/gnulib-tests/test-argmatch.c
@@ -0,0 +1,164 @@
+/* Test of exact or abbreviated match search.
+   Copyright (C) 1990, 1998-1999, 2001-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007, based on test code
+   by David MacKenzie <djm@gnu.ai.mit.edu>.  */
+
+#include <config.h>
+
+/* As of GCC 11.2.1, gcc -Wanalyzer-too-complex reports that main's
+   use of CHECK macros expands to code that is too complicated for gcc
+   -fanalyzer.  Suppress the resulting bogus warnings.  */
+#if 10 <= __GNUC__
+# pragma GCC diagnostic ignored "-Wanalyzer-null-argument"
+#endif
+
+#include "argmatch.h"
+
+#include <stdlib.h>
+
+#include "macros.h"
+
+# define N_(Msgid) (Msgid)
+
+/* Some packages define ARGMATCH_DIE and ARGMATCH_DIE_DECL in <config.h>, and
+   thus must link with a definition of that function.  Provide it here.  */
+#ifdef ARGMATCH_DIE_DECL
+
+_Noreturn ARGMATCH_DIE_DECL;
+ARGMATCH_DIE_DECL { exit (1); }
+
+#endif
+
+enum backup_type
+{
+  no_backups,
+  simple_backups,
+  numbered_existing_backups,
+  numbered_backups
+};
+
+static const char *const backup_args[] =
+{
+  "no", "none", "off",
+  "simple", "never", "single",
+  "existing", "nil", "numbered-existing",
+  "numbered", "t", "newstyle",
+  NULL
+};
+
+static const enum backup_type backup_vals[] =
+{
+  no_backups, no_backups, no_backups,
+  simple_backups, simple_backups, simple_backups,
+  numbered_existing_backups, numbered_existing_backups, numbered_existing_backups,
+  numbered_backups, numbered_backups, numbered_backups
+};
+
+ARGMATCH_DEFINE_GROUP(backup, enum backup_type)
+
+static const argmatch_backup_doc argmatch_backup_docs[] =
+{
+  { "no",       N_("never make backups (even if --backup is given)") },
+  { "numbered", N_("make numbered backups") },
+  { "existing", N_("numbered if numbered backups exist, simple otherwise") },
+  { "simple",   N_("always make simple backups") },
+  { NULL, NULL }
+};
+
+static const argmatch_backup_arg argmatch_backup_args[] =
+{
+  { "no",                no_backups },
+  { "none",              no_backups },
+  { "off",               no_backups },
+  { "simple",            simple_backups },
+  { "never",             simple_backups },
+  { "single",            simple_backups },
+  { "existing",          numbered_existing_backups },
+  { "nil",               numbered_existing_backups },
+  { "numbered-existing", numbered_existing_backups },
+  { "numbered",          numbered_backups },
+  { "t",                 numbered_backups },
+  { "newstyle",          numbered_backups },
+  { NULL, no_backups }
+};
+
+const argmatch_backup_group_type argmatch_backup_group =
+{
+  argmatch_backup_args,
+  argmatch_backup_docs,
+  N_("\
+The backup suffix is '~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX.\n\
+The version control method may be selected via the --backup option or through\n\
+the VERSION_CONTROL environment variable.  Here are the values:\n"),
+  NULL
+};
+
+int
+main (int argc, char *argv[])
+{
+#define CHECK(Input, Output)                                            \
+  do {                                                                  \
+    ASSERT (ARGMATCH (Input, backup_args, backup_vals) == Output);      \
+    ASSERT (argmatch_backup_choice (Input) == Output);                  \
+    if (0 <= Output)                                                    \
+      {                                                                 \
+        enum backup_type val                                            \
+          = argmatch_backup_args[Output < 0 ? 0 : Output].val;          \
+        ASSERT (*argmatch_backup_value ("test", Input) == val);         \
+        ASSERT (*argmatch_backup_value ("test",                         \
+                                        argmatch_backup_argument (&val)) \
+                == val);                                                \
+      }                                                                 \
+  } while (0)
+
+  /* Not found.  */
+  CHECK ("klingon", -1);
+
+  /* Exact match.  */
+  CHECK ("none", 1);
+  CHECK ("nil", 7);
+
+  /* Too long.  */
+  CHECK ("nilpotent", -1);
+
+  /* Abbreviated.  */
+  CHECK ("simpl", 3);
+  CHECK ("simp", 3);
+  CHECK ("sim", 3);
+
+  /* Exact match and abbreviated.  */
+  CHECK ("numbered", 9);
+  CHECK ("numbere", -2);
+  CHECK ("number", -2);
+  CHECK ("numbe", -2);
+  CHECK ("numb", -2);
+  CHECK ("num", -2);
+  CHECK ("nu", -2);
+  CHECK ("n", -2);
+
+  /* Ambiguous abbreviated.  */
+  CHECK ("ne", -2);
+
+  /* Ambiguous abbreviated, but same value ("single" and "simple").  */
+  CHECK ("si", 3);
+  CHECK ("s", 3);
+#undef CHECK
+
+  argmatch_backup_usage (stdout);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-arpa_inet.c b/src/grep/gnulib-tests/test-arpa_inet.c
new file mode 100644
index 0000000..10a27e1
--- /dev/null
+++ b/src/grep/gnulib-tests/test-arpa_inet.c
@@ -0,0 +1,27 @@
+/* Test of <arpa/inet.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <arpa/inet.h>
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-binary-io.c b/src/grep/gnulib-tests/test-binary-io.c
new file mode 100644
index 0000000..7da8f8b
--- /dev/null
+++ b/src/grep/gnulib-tests/test-binary-io.c
@@ -0,0 +1,63 @@
+/* Test of binary mode I/O.
+   Copyright (C) 2005, 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.  */
+
+#include <config.h>
+
+#include "binary-io.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  /* Test the O_BINARY macro.  */
+  {
+    int fd =
+      open ("t-bin-out0.tmp", O_CREAT | O_TRUNC | O_RDWR | O_BINARY, 0600);
+    if (write (fd, "Hello\n", 6) < 0)
+      exit (1);
+    close (fd);
+  }
+  {
+    struct stat statbuf;
+    if (stat ("t-bin-out0.tmp", &statbuf) < 0)
+      exit (1);
+    ASSERT (statbuf.st_size == 6);
+  }
+
+  switch (argv[1][0])
+    {
+    case '1':
+      /* Test the set_binary_mode() function.  */
+      set_binary_mode (1, O_BINARY);
+      fputs ("Hello\n", stdout);
+      break;
+
+    default:
+      break;
+    }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-binary-io.sh b/src/grep/gnulib-tests/test-binary-io.sh
new file mode 100755
index 0000000..a177d94
--- /dev/null
+++ b/src/grep/gnulib-tests/test-binary-io.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+tmpfiles=""
+trap 'rm -fr $tmpfiles' 1 2 3 15
+
+tmpfiles="$tmpfiles t-bin-out0.tmp t-bin-out1.tmp"
+${CHECKER} ./test-binary-io${EXEEXT} 1 > t-bin-out1.tmp || exit 1
+cmp t-bin-out0.tmp t-bin-out1.tmp > /dev/null || exit 1
+
+rm -fr $tmpfiles
+
+exit 0
diff --git a/src/grep/gnulib-tests/test-bind.c b/src/grep/gnulib-tests/test-bind.c
new file mode 100644
index 0000000..8054e9d
--- /dev/null
+++ b/src/grep/gnulib-tests/test-bind.c
@@ -0,0 +1,58 @@
+/* Test binding a server socket to a port.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (bind, int, (int, const struct sockaddr *, socklen_t));
+
+#include <errno.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+
+#include "sockets.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    struct sockaddr_in addr;
+
+    addr.sin_family = AF_INET;
+    inet_pton (AF_INET, "127.0.0.1", &addr.sin_addr);
+    addr.sin_port = htons (80);
+    {
+      errno = 0;
+      ASSERT (bind (-1, (const struct sockaddr *) &addr, sizeof (addr)) == -1);
+      ASSERT (errno == EBADF);
+    }
+    {
+      close (99);
+      errno = 0;
+      ASSERT (bind (99, (const struct sockaddr *) &addr, sizeof (addr)) == -1);
+      ASSERT (errno == EBADF);
+    }
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-bitrotate.c b/src/grep/gnulib-tests/test-bitrotate.c
new file mode 100644
index 0000000..98d15e2
--- /dev/null
+++ b/src/grep/gnulib-tests/test-bitrotate.c
@@ -0,0 +1,279 @@
+/* Test of <bitrotate.h> substitute.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Simon Josefsson <simon@josefsson.org>, 2008.  */
+
+#include <config.h>
+
+#include "bitrotate.h"
+
+#include "macros.h"
+
+int
+main (void)
+{
+  ASSERT (rotl8 (42, 0) == 42);
+  ASSERT (rotl8 (42, 1) == 84);
+  ASSERT (rotl8 (42, 2) == 168);
+  ASSERT (rotl8 (42, 3) == 81);
+  ASSERT (rotl8 (42, 4) == 162);
+  ASSERT (rotl8 (42, 5) == 69);
+  ASSERT (rotl8 (42, 6) == 138);
+  ASSERT (rotl8 (42, 7) == 21);
+  ASSERT (rotl8 (42, 8) == 42);
+
+  ASSERT (rotr8 (42, 0) == 42);
+  ASSERT (rotr8 (42, 1) == 21);
+  ASSERT (rotr8 (42, 2) == 138);
+  ASSERT (rotr8 (42, 3) == 69);
+  ASSERT (rotr8 (42, 4) == 162);
+  ASSERT (rotr8 (42, 5) == 81);
+  ASSERT (rotr8 (42, 6) == 168);
+  ASSERT (rotr8 (42, 7) == 84);
+  ASSERT (rotr8 (42, 8) == 42);
+
+  ASSERT (rotl16 (43981, 0) == 43981);
+  ASSERT (rotl16 (43981, 1) == 22427);
+  ASSERT (rotl16 (43981, 2) == 44854);
+  ASSERT (rotl16 (43981, 3) == 24173);
+  ASSERT (rotl16 (43981, 4) == 48346);
+  ASSERT (rotl16 (43981, 5) == 31157);
+  ASSERT (rotl16 (43981, 6) == 62314);
+  ASSERT (rotl16 (43981, 7) == 59093);
+  ASSERT (rotl16 (43981, 8) == 52651);
+  ASSERT (rotl16 (43981, 9) == 39767);
+  ASSERT (rotl16 (43981, 10) == 13999);
+  ASSERT (rotl16 (43981, 11) == 27998);
+  ASSERT (rotl16 (43981, 12) == 55996);
+  ASSERT (rotl16 (43981, 13) == 46457);
+  ASSERT (rotl16 (43981, 14) == 27379);
+  ASSERT (rotl16 (43981, 15) == 54758);
+  ASSERT (rotl16 (43981, 16) == 43981);
+
+  ASSERT (rotr16 (43981, 0) == 43981);
+  ASSERT (rotr16 (43981, 1) == 54758);
+  ASSERT (rotr16 (43981, 2) == 27379);
+  ASSERT (rotr16 (43981, 3) == 46457);
+  ASSERT (rotr16 (43981, 4) == 55996);
+  ASSERT (rotr16 (43981, 5) == 27998);
+  ASSERT (rotr16 (43981, 6) == 13999);
+  ASSERT (rotr16 (43981, 7) == 39767);
+  ASSERT (rotr16 (43981, 8) == 52651);
+  ASSERT (rotr16 (43981, 9) == 59093);
+  ASSERT (rotr16 (43981, 10) == 62314);
+  ASSERT (rotr16 (43981, 11) == 31157);
+  ASSERT (rotr16 (43981, 12) == 48346);
+  ASSERT (rotr16 (43981, 13) == 24173);
+  ASSERT (rotr16 (43981, 14) == 44854);
+  ASSERT (rotr16 (43981, 15) == 22427);
+  ASSERT (rotr16 (43981, 16) == 43981);
+
+  ASSERT (rotl32 (2309737967U, 1) == 324508639U);
+  ASSERT (rotl32 (2309737967U, 2) == 649017278U);
+  ASSERT (rotl32 (2309737967U, 3) == 1298034556U);
+  ASSERT (rotl32 (2309737967U, 4) == 2596069112U);
+  ASSERT (rotl32 (2309737967U, 5) == 897170929U);
+  ASSERT (rotl32 (2309737967U, 6) == 1794341858U);
+  ASSERT (rotl32 (2309737967U, 7) == 3588683716U);
+  ASSERT (rotl32 (2309737967U, 8) == 2882400137U);
+  ASSERT (rotl32 (2309737967U, 9) == 1469832979U);
+  ASSERT (rotl32 (2309737967U, 10) == 2939665958U);
+  ASSERT (rotl32 (2309737967U, 11) == 1584364621U);
+  ASSERT (rotl32 (2309737967U, 12) == 3168729242U);
+  ASSERT (rotl32 (2309737967U, 13) == 2042491189U);
+  ASSERT (rotl32 (2309737967U, 14) == 4084982378U);
+  ASSERT (rotl32 (2309737967U, 15) == 3874997461U);
+  ASSERT (rotl32 (2309737967U, 16) == 3455027627U);
+  ASSERT (rotl32 (2309737967U, 17) == 2615087959U);
+  ASSERT (rotl32 (2309737967U, 18) == 935208623U);
+  ASSERT (rotl32 (2309737967U, 19) == 1870417246U);
+  ASSERT (rotl32 (2309737967U, 20) == 3740834492U);
+  ASSERT (rotl32 (2309737967U, 21) == 3186701689U);
+  ASSERT (rotl32 (2309737967U, 22) == 2078436083U);
+  ASSERT (rotl32 (2309737967U, 23) == 4156872166U);
+  ASSERT (rotl32 (2309737967U, 24) == 4018777037U);
+  ASSERT (rotl32 (2309737967U, 25) == 3742586779U);
+  ASSERT (rotl32 (2309737967U, 26) == 3190206263U);
+  ASSERT (rotl32 (2309737967U, 27) == 2085445231U);
+  ASSERT (rotl32 (2309737967U, 28) == 4170890462U);
+  ASSERT (rotl32 (2309737967U, 29) == 4046813629U);
+  ASSERT (rotl32 (2309737967U, 30) == 3798659963U);
+  ASSERT (rotl32 (2309737967U, 31) == 3302352631U);
+
+  ASSERT (rotr32 (2309737967U, 1) == 3302352631lU);
+  ASSERT (rotr32 (2309737967U, 2) == 3798659963lU);
+  ASSERT (rotr32 (2309737967U, 3) == 4046813629lU);
+  ASSERT (rotr32 (2309737967U, 4) == 4170890462lU);
+  ASSERT (rotr32 (2309737967U, 5) == 2085445231lU);
+  ASSERT (rotr32 (2309737967U, 6) == 3190206263lU);
+  ASSERT (rotr32 (2309737967U, 7) == 3742586779lU);
+  ASSERT (rotr32 (2309737967U, 8) == 4018777037lU);
+  ASSERT (rotr32 (2309737967U, 9) == 4156872166lU);
+  ASSERT (rotr32 (2309737967U, 10) == 2078436083lU);
+  ASSERT (rotr32 (2309737967U, 11) == 3186701689lU);
+  ASSERT (rotr32 (2309737967U, 12) == 3740834492lU);
+  ASSERT (rotr32 (2309737967U, 13) == 1870417246lU);
+  ASSERT (rotr32 (2309737967U, 14) == 935208623lU);
+  ASSERT (rotr32 (2309737967U, 15) == 2615087959lU);
+  ASSERT (rotr32 (2309737967U, 16) == 3455027627lU);
+  ASSERT (rotr32 (2309737967U, 17) == 3874997461lU);
+  ASSERT (rotr32 (2309737967U, 18) == 4084982378lU);
+  ASSERT (rotr32 (2309737967U, 19) == 2042491189lU);
+  ASSERT (rotr32 (2309737967U, 20) == 3168729242lU);
+  ASSERT (rotr32 (2309737967U, 21) == 1584364621lU);
+  ASSERT (rotr32 (2309737967U, 22) == 2939665958lU);
+  ASSERT (rotr32 (2309737967U, 23) == 1469832979lU);
+  ASSERT (rotr32 (2309737967U, 24) == 2882400137lU);
+  ASSERT (rotr32 (2309737967U, 25) == 3588683716lU);
+  ASSERT (rotr32 (2309737967U, 26) == 1794341858lU);
+  ASSERT (rotr32 (2309737967U, 27) == 897170929lU);
+  ASSERT (rotr32 (2309737967U, 28) == 2596069112lU);
+  ASSERT (rotr32 (2309737967U, 29) == 1298034556lU);
+  ASSERT (rotr32 (2309737967U, 30) == 649017278lU);
+  ASSERT (rotr32 (2309737967U, 31) == 324508639lU);
+
+#ifdef UINT64_MAX
+  ASSERT (rotl64 (16045690984503098046ULL, 1) == 13644637895296644477ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 2) == 8842531716883737339ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 3) == 17685063433767474678ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 4) == 16923382793825397741ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 5) == 15400021513941243867ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 6) == 12353298954172936119ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 7) == 6259853834636320623ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 8) == 12519707669272641246ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 9) == 6592671264835730877ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 10) == 13185342529671461754ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 11) == 7923940985633371893ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 12) == 15847881971266743786ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 13) == 13249019868823935957ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 14) == 8051295663938320299ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 15) == 16102591327876640598ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 16) == 13758438582043729581ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 17) == 9070133090377907547ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 18) == 18140266180755815094ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 19) == 17833788287802078573ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 20) == 17220832501894605531ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 21) == 15994920930079659447ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 22) == 13543097786449767279ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 23) == 8639451499189982943ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 24) == 17278902998379965886ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 25) == 16111061923050380157ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 26) == 13775379772391208699ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 27) == 9104015471072865783ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 28) == 18208030942145731566ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 29) == 17969317810581911517ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 30) == 17491891547454271419ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 31) == 16537039021198991223ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 32) == 14627333968688430831ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 33) == 10807923863667310047ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 34) == 3169103653625068479ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 35) == 6338207307250136958ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 36) == 12676414614500273916ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 37) == 6906085155290996217ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 38) == 13812170310581992434ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 39) == 9177596547454433253ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 40) == 18355193094908866506ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 41) == 18263642116108181397ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 42) == 18080540158506811179ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 43) == 17714336243304070743ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 44) == 16981928412898589871ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 45) == 15517112752087628127ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 46) == 12587481430465704639ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 47) == 6728218787221857663ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 48) == 13456437574443715326ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 49) == 8466131075177879037ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 50) == 16932262150355758074ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 51) == 15417780227001964533ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 52) == 12388816380294377451ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 53) == 6330888686879203287ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 54) == 12661777373758406574ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 55) == 6876810673807261533ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 56) == 13753621347614523066ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 57) == 9060498621519494517ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 58) == 18120997243038989034ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 59) == 17795250412368426453ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 60) == 17143756751027301291ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 61) == 15840769428345050967ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 62) == 13234794782980550319ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 63) == 8022845492251549023ULL);
+
+  ASSERT (rotr64 (16045690984503098046ULL, 1) == 8022845492251549023ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 2) == 13234794782980550319ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 3) == 15840769428345050967ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 4) == 17143756751027301291ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 5) == 17795250412368426453ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 6) == 18120997243038989034ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 7) == 9060498621519494517ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 8) == 13753621347614523066ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 9) == 6876810673807261533ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 10) == 12661777373758406574ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 11) == 6330888686879203287ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 12) == 12388816380294377451ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 13) == 15417780227001964533ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 14) == 16932262150355758074ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 15) == 8466131075177879037ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 16) == 13456437574443715326ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 17) == 6728218787221857663ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 18) == 12587481430465704639ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 19) == 15517112752087628127ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 20) == 16981928412898589871ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 21) == 17714336243304070743ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 22) == 18080540158506811179ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 23) == 18263642116108181397ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 24) == 18355193094908866506ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 25) == 9177596547454433253ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 26) == 13812170310581992434ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 27) == 6906085155290996217ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 28) == 12676414614500273916ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 29) == 6338207307250136958ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 30) == 3169103653625068479ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 31) == 10807923863667310047ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 32) == 14627333968688430831ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 33) == 16537039021198991223ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 34) == 17491891547454271419ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 35) == 17969317810581911517ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 36) == 18208030942145731566ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 37) == 9104015471072865783ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 38) == 13775379772391208699ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 39) == 16111061923050380157ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 40) == 17278902998379965886ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 41) == 8639451499189982943ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 42) == 13543097786449767279ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 43) == 15994920930079659447ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 44) == 17220832501894605531ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 45) == 17833788287802078573ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 46) == 18140266180755815094ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 47) == 9070133090377907547ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 48) == 13758438582043729581ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 49) == 16102591327876640598ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 50) == 8051295663938320299ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 51) == 13249019868823935957ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 52) == 15847881971266743786ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 53) == 7923940985633371893ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 54) == 13185342529671461754ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 55) == 6592671264835730877ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 56) == 12519707669272641246ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 57) == 6259853834636320623ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 58) == 12353298954172936119ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 59) == 15400021513941243867ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 60) == 16923382793825397741ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 61) == 17685063433767474678ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 62) == 8842531716883737339ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 63) == 13644637895296644477ULL);
+#endif /* UINT64_MAX */
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-btowc.c b/src/grep/gnulib-tests/test-btowc.c
new file mode 100644
index 0000000..040abff
--- /dev/null
+++ b/src/grep/gnulib-tests/test-btowc.c
@@ -0,0 +1,63 @@
+/* Test of conversion of unibyte character to wide character.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include <wchar.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (btowc, wint_t, (int));
+
+#include <locale.h>
+#include <stdio.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  int c;
+
+  /* configure should already have checked that the locale is supported.  */
+  if (setlocale (LC_ALL, "") == NULL)
+    return 1;
+
+  ASSERT (btowc (EOF) == WEOF);
+
+  if (argc > 1)
+    switch (argv[1][0])
+      {
+      case '1':
+        /* Locale encoding is ISO-8859-1 or ISO-8859-15.  */
+        for (c = 0; c < 0x80; c++)
+          ASSERT (btowc (c) == c);
+        for (c = 0xA0; c < 0x100; c++)
+          ASSERT (btowc (c) != WEOF);
+        return 0;
+
+      case '2':
+        /* Locale encoding is UTF-8.  */
+        for (c = 0; c < 0x80; c++)
+          ASSERT (btowc (c) == c);
+        for (c = 0x80; c < 0x100; c++)
+          ASSERT (btowc (c) == WEOF);
+        return 0;
+      }
+
+  return 1;
+}
diff --git a/src/grep/gnulib-tests/test-btowc1.sh b/src/grep/gnulib-tests/test-btowc1.sh
new file mode 100755
index 0000000..ab4b287
--- /dev/null
+++ b/src/grep/gnulib-tests/test-btowc1.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Test in an ISO-8859-1 or ISO-8859-15 locale.
+: ${LOCALE_FR=fr_FR}
+if test $LOCALE_FR = none; then
+  if test -f /usr/bin/localedef; then
+    echo "Skipping test: no traditional french locale is installed"
+  else
+    echo "Skipping test: no traditional french locale is supported"
+  fi
+  exit 77
+fi
+
+LC_ALL=$LOCALE_FR \
+${CHECKER} ./test-btowc${EXEEXT} 1
diff --git a/src/grep/gnulib-tests/test-btowc2.sh b/src/grep/gnulib-tests/test-btowc2.sh
new file mode 100755
index 0000000..d7d4d9c
--- /dev/null
+++ b/src/grep/gnulib-tests/test-btowc2.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Test whether a specific UTF-8 locale is installed.
+: ${LOCALE_FR_UTF8=fr_FR.UTF-8}
+if test $LOCALE_FR_UTF8 = none; then
+  if test -f /usr/bin/localedef; then
+    echo "Skipping test: no french Unicode locale is installed"
+  else
+    echo "Skipping test: no french Unicode locale is supported"
+  fi
+  exit 77
+fi
+
+LC_ALL=$LOCALE_FR_UTF8 \
+${CHECKER} ./test-btowc${EXEEXT} 2
diff --git a/src/grep/gnulib-tests/test-c-ctype.c b/src/grep/gnulib-tests/test-c-ctype.c
new file mode 100644
index 0000000..2077eb4
--- /dev/null
+++ b/src/grep/gnulib-tests/test-c-ctype.c
@@ -0,0 +1,228 @@
+/* Test of character handling in C locale.
+   Copyright (C) 2005, 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.  */
+
+#include <config.h>
+
+#include "c-ctype.h"
+
+#include <ctype.h>
+#include <limits.h>
+#include <locale.h>
+
+#include "macros.h"
+
+static void
+test_agree_with_C_locale (void)
+{
+  int c;
+
+  for (c = 0; c <= UCHAR_MAX; c++)
+    {
+      ASSERT (c_isascii (c) == (isascii (c) != 0));
+      if (c_isascii (c))
+        {
+          ASSERT (c_isalnum (c) == (isalnum (c) != 0));
+          ASSERT (c_isalpha (c) == (isalpha (c) != 0));
+          ASSERT (c_isblank (c) == (isblank (c) != 0));
+          ASSERT (c_iscntrl (c) == (iscntrl (c) != 0));
+          ASSERT (c_isdigit (c) == (isdigit (c) != 0));
+          ASSERT (c_islower (c) == (islower (c) != 0));
+          ASSERT (c_isgraph (c) == (isgraph (c) != 0));
+          ASSERT (c_isprint (c) == (isprint (c) != 0));
+          ASSERT (c_ispunct (c) == (ispunct (c) != 0));
+          ASSERT (c_isspace (c) == (isspace (c) != 0));
+          ASSERT (c_isupper (c) == (isupper (c) != 0));
+          ASSERT (c_isxdigit (c) == (isxdigit (c) != 0));
+          ASSERT (c_tolower (c) == tolower (c));
+          ASSERT (c_toupper (c) == toupper (c));
+        }
+    }
+}
+
+static void
+test_all (void)
+{
+  int c;
+  int n_isascii = 0;
+
+  for (c = CHAR_MIN; c <= UCHAR_MAX; c++)
+    {
+      if (! (0 <= c && c <= CHAR_MAX))
+        {
+          ASSERT (! c_isascii (c));
+          ASSERT (! c_isalnum (c));
+          ASSERT (! c_isalpha (c));
+          ASSERT (! c_isblank (c));
+          ASSERT (! c_iscntrl (c));
+          ASSERT (! c_isdigit (c));
+          ASSERT (! c_islower (c));
+          ASSERT (! c_isgraph (c));
+          ASSERT (! c_isprint (c));
+          ASSERT (! c_ispunct (c));
+          ASSERT (! c_isspace (c));
+          ASSERT (! c_isupper (c));
+          ASSERT (! c_isxdigit (c));
+          ASSERT (c_tolower (c) == c);
+          ASSERT (c_toupper (c) == c);
+        }
+
+      n_isascii += c_isascii (c);
+
+#ifdef C_CTYPE_ASCII
+      ASSERT (c_isascii (c) == (0 <= c && c <= 0x7f));
+#endif
+
+      ASSERT (c_isascii (c) == (c_isprint (c) || c_iscntrl (c)));
+
+      ASSERT (c_isalnum (c) == (c_isalpha (c) || c_isdigit (c)));
+
+      ASSERT (c_isalpha (c) == (c_islower (c) || c_isupper (c)));
+
+      switch (c)
+        {
+        case '\t': case ' ':
+          ASSERT (c_isblank (c) == 1);
+          break;
+        default:
+          ASSERT (c_isblank (c) == 0);
+          break;
+        }
+
+#ifdef C_CTYPE_ASCII
+      ASSERT (c_iscntrl (c) == ((c >= 0 && c < 0x20) || c == 0x7f));
+#endif
+
+      switch (c)
+        {
+        case '\a': case '\b': case '\f': case '\n':
+        case '\r': case '\t': case '\v':
+          ASSERT (c_iscntrl (c));
+          break;
+        }
+
+      ASSERT (! (c_iscntrl (c) && c_isprint (c)));
+
+      switch (c)
+        {
+        case '0': case '1': case '2': case '3': case '4': case '5':
+        case '6': case '7': case '8': case '9':
+          ASSERT (c_isdigit (c) == 1);
+          break;
+        default:
+          ASSERT (c_isdigit (c) == 0);
+          break;
+        }
+
+      switch (c)
+        {
+        case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
+        case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
+        case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
+        case 's': case 't': case 'u': case 'v': case 'w': case 'x':
+        case 'y': case 'z':
+          ASSERT (c_islower (c) == 1);
+          ASSERT (c_toupper (c) == c - 'a' + 'A');
+          break;
+        default:
+          ASSERT (c_islower (c) == 0);
+          ASSERT (c_toupper (c) == c);
+          break;
+        }
+
+#ifdef C_CTYPE_ASCII
+      ASSERT (c_isgraph (c) == ((c >= 0x20 && c < 0x7f) && c != ' '));
+
+      ASSERT (c_isprint (c) == (c >= 0x20 && c < 0x7f));
+#endif
+
+      ASSERT (c_isgraph (c) == (c_isalnum (c) || c_ispunct (c)));
+
+      ASSERT (c_isprint (c) == (c_isgraph (c) || c == ' '));
+
+      switch (c)
+        {
+        case '!': case '"': case '#': case '$': case '%': case '&': case '\'':
+        case '(': case ')': case '*': case '+': case ',': case '-': case '.':
+        case '/': case ':': case ';': case '<': case '=': case '>': case '?':
+        case '@': case '[': case'\\': case ']': case '^': case '_': case '`':
+        case '{': case '|': case '}': case '~':
+          ASSERT (c_ispunct (c) == 1);
+          break;
+        default:
+          ASSERT (c_ispunct (c) == 0);
+          break;
+        }
+
+      switch (c)
+        {
+        case ' ': case '\t': case '\n': case '\v': case '\f': case '\r':
+          ASSERT (c_isspace (c) == 1);
+          break;
+        default:
+          ASSERT (c_isspace (c) == 0);
+          break;
+        }
+
+      switch (c)
+        {
+        case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
+        case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
+        case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
+        case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
+        case 'Y': case 'Z':
+          ASSERT (c_isupper (c) == 1);
+          ASSERT (c_tolower (c) == c - 'A' + 'a');
+          break;
+        default:
+          ASSERT (c_isupper (c) == 0);
+          ASSERT (c_tolower (c) == c);
+          break;
+        }
+
+      switch (c)
+        {
+        case '0': case '1': case '2': case '3': case '4': case '5':
+        case '6': case '7': case '8': case '9':
+        case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
+        case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
+          ASSERT (c_isxdigit (c) == 1);
+          break;
+        default:
+          ASSERT (c_isxdigit (c) == 0);
+          break;
+        }
+    }
+
+  ASSERT (n_isascii == 128);
+}
+
+int
+main ()
+{
+  test_agree_with_C_locale ();
+
+  test_all ();
+
+  setlocale (LC_ALL, "de_DE");
+  test_all ();
+
+  setlocale (LC_ALL, "ja_JP.EUC-JP");
+  test_all ();
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-c-stack.c b/src/grep/gnulib-tests/test-c-stack.c
new file mode 100644
index 0000000..2c5a49a
--- /dev/null
+++ b/src/grep/gnulib-tests/test-c-stack.c
@@ -0,0 +1,73 @@
+/* Test of c-stack module.
+   Copyright (C) 2002, 2004, 2006, 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "c-stack.h"
+
+#include "exitfail.h"
+#include <stdio.h>
+#if HAVE_SETRLIMIT
+/* At least FreeBSD 5.0 needs extra headers before <sys/resource.h>
+   will compile.  */
+# include <sys/types.h>
+# include <sys/time.h>
+# include <sys/resource.h>
+#endif
+
+#include "macros.h"
+
+static volatile int *
+recurse_1 (volatile int n, volatile int *p)
+{
+  if (n >= 0)
+    *recurse_1 (n + 1, p) += n;
+  return p;
+}
+
+static int
+recurse (volatile int n)
+{
+  int sum = 0;
+  return *recurse_1 (n, &sum);
+}
+
+int
+main (int argc, char **argv)
+{
+#if HAVE_SETRLIMIT && defined RLIMIT_STACK
+  /* Before starting the endless recursion, try to be friendly to the
+     user's machine.  On some Linux 2.2.x systems, there is no stack
+     limit for user processes at all.  We don't want to kill such
+     systems.  */
+  struct rlimit rl;
+  rl.rlim_cur = rl.rlim_max = 0x100000; /* 1 MB */
+  setrlimit (RLIMIT_STACK, &rl);
+#endif
+
+  if (c_stack_action (NULL) == 0)
+    {
+      if (1 < argc)
+        {
+          exit_failure = 77;
+          ++*argv[argc]; /* Intentionally dereference NULL.  */
+        }
+      return recurse (0);
+    }
+  fputs ("skipping test: ", stderr);
+  perror ("c_stack_action");
+  return 77;
+}
diff --git a/src/grep/gnulib-tests/test-c-stack.sh b/src/grep/gnulib-tests/test-c-stack.sh
new file mode 100755
index 0000000..54009d3
--- /dev/null
+++ b/src/grep/gnulib-tests/test-c-stack.sh
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+tmpfiles=""
+trap 'rm -fr $tmpfiles' 1 2 3 15
+
+tmpfiles="t-c-stack.tmp"
+${CHECKER} ./test-c-stack${EXEEXT} 2> t-c-stack.tmp
+case $? in
+  77) cat t-c-stack.tmp >&2; (exit 77); exit 77 ;;
+  1) ;;
+  *) (exit 1); exit 1 ;;
+esac
+if grep 'stack overflow' t-c-stack.tmp >/dev/null ; then
+  :
+else
+  (exit 1); exit 1
+fi
+
+rm -fr $tmpfiles
+
+exit 0
diff --git a/src/grep/gnulib-tests/test-c-stack2.sh b/src/grep/gnulib-tests/test-c-stack2.sh
new file mode 100755
index 0000000..7f03593
--- /dev/null
+++ b/src/grep/gnulib-tests/test-c-stack2.sh
@@ -0,0 +1,43 @@
+#!/bin/sh
+
+tmpfiles=""
+trap 'rm -fr $tmpfiles' 1 2 3 15
+
+tmpfiles="t-c-stack2.tmp"
+
+# Sanitize exit status within a subshell, since some shells fail to
+# redirect stderr on their message about death due to signal.
+(${CHECKER} ./test-c-stack${EXEEXT} 1; exit $?) 2> t-c-stack2.tmp
+
+case $? in
+  77) if grep 'stack overflow' t-c-stack2.tmp >/dev/null ; then
+        if test -z "$LIBSIGSEGV"; then
+          echo 'cannot tell stack overflow from crash; consider installing libsigsegv' >&2
+          exit 77
+        else
+          echo 'cannot tell stack overflow from crash, in spite of libsigsegv' >&2
+          exit 1
+        fi
+      else
+        cat t-c-stack2.tmp >&2
+        exit 77
+      fi
+      ;;
+  1)
+      # Dereferencing NULL exits the program with status 1,
+      # so this test doesn't check the c-stack testing harness like it should.
+      # https://lists.gnu.org/r/grep-devel/2020-09/msg00034.html
+      cat t-c-stack2.tmp >&2
+      echo 'skipping test (perhaps gcc -fsanitize=undefined is in use?)'
+      exit 77;;
+  0) (exit 1); exit 1 ;;
+esac
+if grep 'program error' t-c-stack2.tmp >/dev/null ; then
+  :
+else
+  (exit 1); exit 1
+fi
+
+rm -fr $tmpfiles
+
+exit 0
diff --git a/src/grep/gnulib-tests/test-c-strcase.sh b/src/grep/gnulib-tests/test-c-strcase.sh
new file mode 100755
index 0000000..14bdfb2
--- /dev/null
+++ b/src/grep/gnulib-tests/test-c-strcase.sh
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+# Test in the C locale.
+${CHECKER} ./test-c-strcasecmp${EXEEXT} || exit 1
+${CHECKER} ./test-c-strncasecmp${EXEEXT} || exit 1
+
+# Test in an ISO-8859-1 or ISO-8859-15 locale.
+: ${LOCALE_FR=fr_FR}
+if test $LOCALE_FR != none; then
+  LC_ALL=$LOCALE_FR ${CHECKER} ./test-c-strcasecmp${EXEEXT} locale || exit 1
+  LC_ALL=$LOCALE_FR ${CHECKER} ./test-c-strncasecmp${EXEEXT} locale || exit 1
+fi
+
+# Test in a Turkish UTF-8 locale.
+: ${LOCALE_TR_UTF8=tr_TR.UTF-8}
+if test $LOCALE_TR_UTF8 != none; then
+  LC_ALL=$LOCALE_TR_UTF8 ${CHECKER} ./test-c-strcasecmp${EXEEXT} locale || exit 1
+  LC_ALL=$LOCALE_TR_UTF8 ${CHECKER} ./test-c-strncasecmp${EXEEXT} locale || exit 1
+fi
+
+exit 0
diff --git a/src/grep/gnulib-tests/test-c-strcasecmp.c b/src/grep/gnulib-tests/test-c-strcasecmp.c
new file mode 100644
index 0000000..cc2efb0
--- /dev/null
+++ b/src/grep/gnulib-tests/test-c-strcasecmp.c
@@ -0,0 +1,68 @@
+/* Test of case-insensitive string comparison function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include "c-strcase.h"
+#include "c-ctype.h"
+
+#include <locale.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  if (argc > 1)
+    {
+      /* configure should already have checked that the locale is supported.  */
+      if (setlocale (LC_ALL, "") == NULL)
+        return 1;
+    }
+
+  ASSERT (c_strcasecmp ("paragraph", "Paragraph") == 0);
+
+  ASSERT (c_strcasecmp ("paragrapH", "parAgRaph") == 0);
+
+  ASSERT (c_strcasecmp ("paragraph", "paraLyzed") < 0);
+  ASSERT (c_strcasecmp ("paraLyzed", "paragraph") > 0);
+
+  ASSERT (c_strcasecmp ("para", "paragraph") < 0);
+  ASSERT (c_strcasecmp ("paragraph", "para") > 0);
+
+  /* The following tests shows how c_strcasecmp() is different from
+     strcasecmp().  */
+
+  ASSERT (c_strcasecmp ("\311mile", "\351mile") < 0);
+  ASSERT (c_strcasecmp ("\351mile", "\311mile") > 0);
+
+  /* The following tests shows how c_strcasecmp() is different from
+     mbscasecmp().  */
+
+  ASSERT (c_strcasecmp ("\303\266zg\303\274r", "\303\226ZG\303\234R") > 0); /* özgür */
+  ASSERT (c_strcasecmp ("\303\226ZG\303\234R", "\303\266zg\303\274r") < 0); /* özgür */
+
+#if C_CTYPE_ASCII
+  /* This test shows how strings of different size cannot compare equal.  */
+  ASSERT (c_strcasecmp ("turkish", "TURK\304\260SH") < 0);
+  ASSERT (c_strcasecmp ("TURK\304\260SH", "turkish") > 0);
+#endif
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-c-strncasecmp.c b/src/grep/gnulib-tests/test-c-strncasecmp.c
new file mode 100644
index 0000000..6cbdce0
--- /dev/null
+++ b/src/grep/gnulib-tests/test-c-strncasecmp.c
@@ -0,0 +1,82 @@
+/* Test of case-insensitive string comparison function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include "c-strcase.h"
+#include "c-ctype.h"
+
+#include <locale.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  if (argc > 1)
+    {
+      /* configure should already have checked that the locale is supported.  */
+      if (setlocale (LC_ALL, "") == NULL)
+        return 1;
+    }
+
+  ASSERT (c_strncasecmp ("paragraph", "Paragraph", 1000000) == 0);
+  ASSERT (c_strncasecmp ("paragraph", "Paragraph", 9) == 0);
+
+  ASSERT (c_strncasecmp ("paragrapH", "parAgRaph", 1000000) == 0);
+  ASSERT (c_strncasecmp ("paragrapH", "parAgRaph", 9) == 0);
+
+  ASSERT (c_strncasecmp ("paragraph", "paraLyzed", 10) < 0);
+  ASSERT (c_strncasecmp ("paragraph", "paraLyzed", 9) < 0);
+  ASSERT (c_strncasecmp ("paragraph", "paraLyzed", 5) < 0);
+  ASSERT (c_strncasecmp ("paragraph", "paraLyzed", 4) == 0);
+  ASSERT (c_strncasecmp ("paraLyzed", "paragraph", 10) > 0);
+  ASSERT (c_strncasecmp ("paraLyzed", "paragraph", 9) > 0);
+  ASSERT (c_strncasecmp ("paraLyzed", "paragraph", 5) > 0);
+  ASSERT (c_strncasecmp ("paraLyzed", "paragraph", 4) == 0);
+
+  ASSERT (c_strncasecmp ("para", "paragraph", 10) < 0);
+  ASSERT (c_strncasecmp ("para", "paragraph", 9) < 0);
+  ASSERT (c_strncasecmp ("para", "paragraph", 5) < 0);
+  ASSERT (c_strncasecmp ("para", "paragraph", 4) == 0);
+  ASSERT (c_strncasecmp ("paragraph", "para", 10) > 0);
+  ASSERT (c_strncasecmp ("paragraph", "para", 9) > 0);
+  ASSERT (c_strncasecmp ("paragraph", "para", 5) > 0);
+  ASSERT (c_strncasecmp ("paragraph", "para", 4) == 0);
+
+  /* The following tests shows how c_strncasecmp() is different from
+     strncasecmp().  */
+
+  ASSERT (c_strncasecmp ("\311mily", "\351mile", 4) < 0);
+  ASSERT (c_strncasecmp ("\351mile", "\311mily", 4) > 0);
+
+  /* The following tests shows how c_strncasecmp() is different from
+     mbsncasecmp().  */
+
+  ASSERT (c_strncasecmp ("\303\266zg\303\274r", "\303\226ZG\303\234R", 99) > 0); /* özgür */
+  ASSERT (c_strncasecmp ("\303\226ZG\303\234R", "\303\266zg\303\274r", 99) < 0); /* özgür */
+
+#if C_CTYPE_ASCII
+  /* This test shows how strings of different size cannot compare equal.  */
+  ASSERT (c_strncasecmp ("turkish", "TURK\304\260SH", 7) < 0);
+  ASSERT (c_strncasecmp ("TURK\304\260SH", "turkish", 7) > 0);
+#endif
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-calloc-gnu.c b/src/grep/gnulib-tests/test-calloc-gnu.c
new file mode 100644
index 0000000..a98a75f
--- /dev/null
+++ b/src/grep/gnulib-tests/test-calloc-gnu.c
@@ -0,0 +1,73 @@
+/* Test of calloc function.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include <errno.h>
+#include <stdint.h>
+
+#include "macros.h"
+
+/* Return N.
+   Usual compilers are not able to infer something about the return value.  */
+static size_t
+identity (size_t n)
+{
+  unsigned int x = rand ();
+  unsigned int y = x * x * x * x;
+  x++; y |= x * x * x * x;
+  x++; y |= x * x * x * x;
+  x++; y |= x * x * x * x;
+  y = y >> 1;
+  y &= -y;
+  y -= 8;
+  /* At this point Y is zero but GCC doesn't infer this.  */
+  return n + y;
+}
+
+int
+main ()
+{
+  /* Check that calloc (0, 0) is not a NULL pointer.  */
+  {
+    void * volatile p = calloc (0, 0);
+    ASSERT (p != NULL);
+    free (p);
+  }
+
+  /* Check that calloc fails when requested to allocate a block of memory
+     larger than PTRDIFF_MAX or SIZE_MAX bytes.
+     Use 'identity' to avoid a compiler warning from GCC 7.
+     'volatile' is needed to defeat an incorrect optimization by clang 10,
+     see <https://bugs.llvm.org/show_bug.cgi?id=46055>.  */
+  {
+    for (size_t n = 2; n != 0; n <<= 1)
+      {
+        void *volatile p = calloc (PTRDIFF_MAX / n + 1, identity (n));
+        ASSERT (p == NULL);
+        ASSERT (errno == ENOMEM);
+
+	p = calloc (SIZE_MAX / n + 1, identity (n));
+        ASSERT (p == NULL);
+        ASSERT (errno == ENOMEM);
+      }
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-chdir.c b/src/grep/gnulib-tests/test-chdir.c
new file mode 100644
index 0000000..3b247d7
--- /dev/null
+++ b/src/grep/gnulib-tests/test-chdir.c
@@ -0,0 +1,33 @@
+/* Test changing to a directory.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (chdir, int, (const char *));
+
+#include "macros.h"
+
+int
+main (void)
+{
+  ASSERT (chdir ("/") == 0);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-cloexec.c b/src/grep/gnulib-tests/test-cloexec.c
new file mode 100644
index 0000000..660e455
--- /dev/null
+++ b/src/grep/gnulib-tests/test-cloexec.c
@@ -0,0 +1,148 @@
+/* Test duplicating non-inheritable file descriptors.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include "cloexec.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Get declarations of the native Windows API functions.  */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+/* Get _get_osfhandle.  */
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+#endif
+
+#include "binary-io.h"
+#include "macros.h"
+
+/* Return non-zero if FD is open and inheritable across exec/spawn.  */
+static int
+is_inheritable (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  /* On native Windows, the initial state of unassigned standard file
+     descriptors is that they are open but point to an
+     INVALID_HANDLE_VALUE, and there is no fcntl.  */
+  HANDLE h = (HANDLE) _get_osfhandle (fd);
+  DWORD flags;
+  if (h == INVALID_HANDLE_VALUE || GetHandleInformation (h, &flags) == 0)
+    return 0;
+  return (flags & HANDLE_FLAG_INHERIT) != 0;
+#else
+# ifndef F_GETFD
+#  error Please port fcntl to your platform
+# endif
+  int i = fcntl (fd, F_GETFD);
+  return 0 <= i && (i & FD_CLOEXEC) == 0;
+#endif
+}
+
+#if !O_BINARY
+# define set_binary_mode(f,m) zero ()
+static int zero (void) { return 0; }
+#endif
+
+/* Return non-zero if FD is open in the given MODE, which is either
+   O_TEXT or O_BINARY.  */
+static int
+is_mode (int fd, int mode)
+{
+  int value = set_binary_mode (fd, O_BINARY);
+  set_binary_mode (fd, value);
+  return mode == value;
+}
+
+int
+main (void)
+{
+  const char *file = "test-cloexec.tmp";
+  int fd = creat (file, 0600);
+  int fd2;
+  int bad_fd = getdtablesize ();
+
+  /* Assume std descriptors were provided by invoker.  */
+  ASSERT (STDERR_FILENO < fd);
+  ASSERT (is_inheritable (fd));
+
+  /* Normal use of set_cloexec_flag.  */
+  ASSERT (set_cloexec_flag (fd, true) == 0);
+#if !(defined _WIN32 && ! defined __CYGWIN__)
+  ASSERT (!is_inheritable (fd));
+#endif
+  ASSERT (set_cloexec_flag (fd, false) == 0);
+  ASSERT (is_inheritable (fd));
+
+  /* Normal use of dup_cloexec.  */
+  fd2 = dup_cloexec (fd);
+  ASSERT (fd < fd2);
+  ASSERT (!is_inheritable (fd2));
+  ASSERT (close (fd) == 0);
+  ASSERT (dup_cloexec (fd2) == fd);
+  ASSERT (!is_inheritable (fd));
+  ASSERT (close (fd2) == 0);
+
+  /* On systems that distinguish between text and binary mode,
+     dup_cloexec reuses the mode of the source.  */
+  set_binary_mode (fd, O_BINARY);
+  ASSERT (is_mode (fd, O_BINARY));
+  fd2 = dup_cloexec (fd);
+  ASSERT (fd < fd2);
+  ASSERT (is_mode (fd2, O_BINARY));
+  ASSERT (close (fd2) == 0);
+  set_binary_mode (fd, O_TEXT);
+  ASSERT (is_mode (fd, O_TEXT));
+  fd2 = dup_cloexec (fd);
+  ASSERT (fd < fd2);
+  ASSERT (is_mode (fd2, O_TEXT));
+  ASSERT (close (fd2) == 0);
+
+  /* Test error handling.  */
+  errno = 0;
+  ASSERT (set_cloexec_flag (-1, false) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (set_cloexec_flag (bad_fd, false) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (set_cloexec_flag (fd2, false) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (dup_cloexec (-1) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (dup_cloexec (bad_fd) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (dup_cloexec (fd2) == -1);
+  ASSERT (errno == EBADF);
+
+  /* Clean up.  */
+  ASSERT (close (fd) == 0);
+  ASSERT (unlink (file) == 0);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-close.c b/src/grep/gnulib-tests/test-close.c
new file mode 100644
index 0000000..992475f
--- /dev/null
+++ b/src/grep/gnulib-tests/test-close.c
@@ -0,0 +1,45 @@
+/* Test closing a file or socket.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (close, int, (int));
+
+#include <errno.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    errno = 0;
+    ASSERT (close (-1) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    close (99);
+    errno = 0;
+    ASSERT (close (99) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-connect.c b/src/grep/gnulib-tests/test-connect.c
new file mode 100644
index 0000000..5e2905b
--- /dev/null
+++ b/src/grep/gnulib-tests/test-connect.c
@@ -0,0 +1,60 @@
+/* Test connecting a client socket.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (connect, int, (int, const struct sockaddr *, socklen_t));
+
+#include <errno.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+
+#include "sockets.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    struct sockaddr_in addr;
+
+    addr.sin_family = AF_INET;
+    inet_pton (AF_INET, "127.0.0.1", &addr.sin_addr);
+    addr.sin_port = htons (80);
+    {
+      errno = 0;
+      ASSERT (connect (-1, (const struct sockaddr *) &addr, sizeof (addr))
+              == -1);
+      ASSERT (errno == EBADF);
+    }
+    {
+      close (99);
+      errno = 0;
+      ASSERT (connect (99, (const struct sockaddr *) &addr, sizeof (addr))
+              == -1);
+      ASSERT (errno == EBADF);
+    }
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-ctype.c b/src/grep/gnulib-tests/test-ctype.c
new file mode 100644
index 0000000..43256a4
--- /dev/null
+++ b/src/grep/gnulib-tests/test-ctype.c
@@ -0,0 +1,27 @@
+/* Test of <ctype.h> substitute.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <ctype.h>
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-dfa-invalid-char-class.sh b/src/grep/gnulib-tests/test-dfa-invalid-char-class.sh
new file mode 100755
index 0000000..10c408c
--- /dev/null
+++ b/src/grep/gnulib-tests/test-dfa-invalid-char-class.sh
@@ -0,0 +1,30 @@
+#!/bin/sh
+# This use of our DFA-testing helper would fail for grep-2.21.
+
+# Copyright 2014-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+# Add "." to PATH for the use of test-dfa-match-aux.
+path_prepend_ .
+
+fail=0
+
+echo 'dfaerror: invalid character class' > exp
+LC_ALL=C ${CHECKER} test-dfa-match-aux '[[:foo:]]' a > out 2>&1
+compare exp out || fail=1
+
+Exit $fail
diff --git a/src/grep/gnulib-tests/test-dfa-invalid-merge.sh b/src/grep/gnulib-tests/test-dfa-invalid-merge.sh
new file mode 100755
index 0000000..e527dca
--- /dev/null
+++ b/src/grep/gnulib-tests/test-dfa-invalid-merge.sh
@@ -0,0 +1,31 @@
+#!/bin/sh
+# The DFA matcher would wrongly convert a regular expression like
+# a+a+a to a+a, thus possibly reporting a false match.
+# Introduced in v0.1-2111-g4299106ce
+
+# Copyright 2020-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+# Add "." to PATH for the use of test-dfa-match-aux.
+path_prepend_ .
+
+fail=0
+
+LC_ALL=C returns_ 0 ${CHECKER} test-dfa-match-aux 'x+x+x+' xx > out 2>&1
+compare /dev/null out || fail=1
+
+Exit $fail
diff --git a/src/grep/gnulib-tests/test-dfa-match-aux.c b/src/grep/gnulib-tests/test-dfa-match-aux.c
new file mode 100644
index 0000000..7b7706a
--- /dev/null
+++ b/src/grep/gnulib-tests/test-dfa-match-aux.c
@@ -0,0 +1,73 @@
+/* Auxiliary program to test a DFA code path that cannot be triggered
+   by grep or gawk.
+   Copyright 2014-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+#include <config.h>
+#include <locale.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <regex.h>
+#include <dfa.h>
+#include <localeinfo.h>
+
+_Noreturn void
+dfaerror (char const *mesg)
+{
+  printf ("dfaerror: %s\n", mesg);
+  exit (EXIT_FAILURE);
+}
+
+static int exit_status = EXIT_SUCCESS;
+
+void
+dfawarn (char const *mesg)
+{
+  printf ("dfawarn: %s\n", mesg);
+  exit_status = EXIT_FAILURE;
+}
+
+int
+main (int argc, char **argv)
+{
+  struct dfa *dfa;
+  char *beg, *end, *p;
+  int allow_nl;
+  struct localeinfo localeinfo;
+
+  if (argc < 3)
+    exit (EXIT_FAILURE);
+
+  setlocale (LC_ALL, "");
+  init_localeinfo (&localeinfo);
+
+  dfa = dfaalloc ();
+  dfasyntax (dfa, &localeinfo, RE_SYNTAX_EGREP | RE_NO_EMPTY_RANGES, 0);
+  dfacomp (argv[1], strlen (argv[1]), dfa, 0);
+
+  beg = argv[2];
+  end = argv[2] + strlen (argv[2]);
+  allow_nl = argc > 3 && atoi (argv[3]);
+
+  p = dfaexec (dfa, beg, end, allow_nl, NULL, NULL);
+
+  if (p != NULL)
+    printf ("%zd\n", p - beg);
+
+  exit (exit_status);
+}
diff --git a/src/grep/gnulib-tests/test-dfa-match.sh b/src/grep/gnulib-tests/test-dfa-match.sh
new file mode 100755
index 0000000..983cdae
--- /dev/null
+++ b/src/grep/gnulib-tests/test-dfa-match.sh
@@ -0,0 +1,45 @@
+#!/bin/sh
+# This would fail with grep-2.21's dfa.c.
+
+# Copyright 2014-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+# Add "." to PATH for the use of test-dfa-match-aux.
+path_prepend_ .
+
+if (type timeout) >/dev/null 2>&1; then
+    # Busybox's timeout required -t until its 1.30.0 release on 2018-12-31,
+    # after which it became compatible with coreutils' timeout.
+  if timeout --help 2>&1 | grep BusyBox && timeout -t 0 true; then
+    timeout_10='timeout -t 10'
+  else
+    timeout_10='timeout 10'
+  fi
+else
+  timeout_10=
+fi
+
+fail=0
+
+${CHECKER} test-dfa-match-aux a ba 0 > out || fail=1
+compare /dev/null out || fail=1
+
+in=$(printf "bb\nbb")
+$timeout_10 ${CHECKER} test-dfa-match-aux a "$in" 1 > out || fail=1
+compare /dev/null out || fail=1
+
+Exit $fail
diff --git a/src/grep/gnulib-tests/test-dirent.c b/src/grep/gnulib-tests/test-dirent.c
new file mode 100644
index 0000000..e964330
--- /dev/null
+++ b/src/grep/gnulib-tests/test-dirent.c
@@ -0,0 +1,32 @@
+/* Test of <dirent.h> substitute.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <dirent.h>
+
+/* Check for existence of required types.  */
+static DIR *dir _GL_UNUSED;
+static struct dirent d;
+static ino_t i;
+
+int
+main (void)
+{
+  return d.d_name[0] + i;
+}
diff --git a/src/grep/gnulib-tests/test-dup-safer.c b/src/grep/gnulib-tests/test-dup-safer.c
new file mode 100644
index 0000000..7ad768f
--- /dev/null
+++ b/src/grep/gnulib-tests/test-dup-safer.c
@@ -0,0 +1,180 @@
+/* Test that dup_safer leaves standard fds alone.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include "unistd--.h"
+
+#include <fcntl.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "binary-io.h"
+#include "cloexec.h"
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Get declarations of the native Windows API functions.  */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+/* Get _get_osfhandle.  */
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+#endif
+
+#if !O_BINARY
+# define set_binary_mode(f,m) zero ()
+static int zero (void) { return 0; }
+#endif
+
+/* This test intentionally closes stderr.  So, we arrange to have fd 10
+   (outside the range of interesting fd's during the test) set up to
+   duplicate the original stderr.  */
+
+#define BACKUP_STDERR_FILENO 10
+#define ASSERT_STREAM myerr
+#include "macros.h"
+
+static FILE *myerr;
+
+/* Return true if FD is open.  */
+static bool
+is_open (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  /* On native Windows, the initial state of unassigned standard file
+     descriptors is that they are open but point to an
+     INVALID_HANDLE_VALUE, and there is no fcntl.  */
+  return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
+#else
+# ifndef F_GETFL
+#  error Please port fcntl to your platform
+# endif
+  return 0 <= fcntl (fd, F_GETFL);
+#endif
+}
+
+/* Return true if FD is open and inheritable across exec/spawn.  */
+static bool
+is_inheritable (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  /* On native Windows, the initial state of unassigned standard file
+     descriptors is that they are open but point to an
+     INVALID_HANDLE_VALUE, and there is no fcntl.  */
+  HANDLE h = (HANDLE) _get_osfhandle (fd);
+  DWORD flags;
+  if (h == INVALID_HANDLE_VALUE || GetHandleInformation (h, &flags) == 0)
+    return 0;
+  return (flags & HANDLE_FLAG_INHERIT) != 0;
+#else
+# ifndef F_GETFD
+#  error Please port fcntl to your platform
+# endif
+  int i = fcntl (fd, F_GETFD);
+  return 0 <= i && (i & FD_CLOEXEC) == 0;
+#endif
+}
+
+/* Return true if FD is open in the given MODE, which is either
+   O_TEXT or O_BINARY.  */
+static bool
+is_mode (int fd, int mode)
+{
+  int value = set_binary_mode (fd, O_BINARY);
+  set_binary_mode (fd, value);
+  return mode == value;
+}
+
+#define witness "test-dup-safer.txt"
+
+int
+main (void)
+{
+  int i;
+  int fd;
+  int bad_fd = getdtablesize ();
+
+  /* We close fd 2 later, so save it in fd 10.  */
+  if (dup2 (STDERR_FILENO, BACKUP_STDERR_FILENO) != BACKUP_STDERR_FILENO
+      || (myerr = fdopen (BACKUP_STDERR_FILENO, "w")) == NULL)
+    return 2;
+
+  /* Create file for later checks.  */
+  fd = creat (witness, 0600);
+  ASSERT (STDERR_FILENO < fd);
+
+  /* Four iterations, with progressively more standard descriptors
+     closed.  */
+  for (i = -1; i <= STDERR_FILENO; i++)
+    {
+      if (0 <= i)
+        ASSERT (close (i) == 0);
+
+      /* Detect errors.  */
+      errno = 0;
+      ASSERT (dup (-1) == -1);
+      ASSERT (errno == EBADF);
+      errno = 0;
+      ASSERT (dup (bad_fd) == -1);
+      ASSERT (errno == EBADF);
+      close (fd + 1);
+      errno = 0;
+      ASSERT (dup (fd + 1) == -1);
+      ASSERT (errno == EBADF);
+
+      /* Preserve text vs. binary.  */
+      set_binary_mode (fd, O_BINARY);
+      ASSERT (dup (fd) == fd + 1);
+      ASSERT (is_open (fd + 1));
+      ASSERT (is_inheritable (fd + 1));
+      ASSERT (is_mode (fd + 1, O_BINARY));
+
+      ASSERT (close (fd + 1) == 0);
+      set_binary_mode (fd, O_TEXT);
+      ASSERT (dup (fd) == fd + 1);
+      ASSERT (is_open (fd + 1));
+      ASSERT (is_inheritable (fd + 1));
+      ASSERT (is_mode (fd + 1, O_TEXT));
+
+      /* Create cloexec copy.  */
+      ASSERT (close (fd + 1) == 0);
+      ASSERT (fd_safer_flag (dup_cloexec (fd), O_CLOEXEC) == fd + 1);
+      ASSERT (set_cloexec_flag (fd + 1, true) == 0);
+      ASSERT (is_open (fd + 1));
+      ASSERT (!is_inheritable (fd + 1));
+      ASSERT (close (fd) == 0);
+
+      /* dup always creates inheritable copies.  Also, check that
+         earliest slot past std fds is used.  */
+      ASSERT (dup (fd + 1) == fd);
+      ASSERT (is_open (fd));
+      ASSERT (is_inheritable (fd));
+      ASSERT (close (fd + 1) == 0);
+    }
+
+  /* Cleanup.  */
+  ASSERT (close (fd) == 0);
+  ASSERT (unlink (witness) == 0);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-dup.c b/src/grep/gnulib-tests/test-dup.c
new file mode 100644
index 0000000..52dd891
--- /dev/null
+++ b/src/grep/gnulib-tests/test-dup.c
@@ -0,0 +1,45 @@
+/* Test duplicating a file descriptor.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (dup, int, (int));
+
+#include <errno.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    errno = 0;
+    ASSERT (dup (-1) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    close (99);
+    errno = 0;
+    ASSERT (dup (99) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-dup2.c b/src/grep/gnulib-tests/test-dup2.c
new file mode 100644
index 0000000..6c2e65e
--- /dev/null
+++ b/src/grep/gnulib-tests/test-dup2.c
@@ -0,0 +1,222 @@
+/* Test duplicating file descriptors.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (dup2, int, (int, int));
+
+#include <errno.h>
+#include <fcntl.h>
+
+#if HAVE_SYS_RESOURCE_H
+# include <sys/resource.h>
+#endif
+
+#include "binary-io.h"
+
+#if GNULIB_TEST_CLOEXEC
+# include "cloexec.h"
+#endif
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Get declarations of the native Windows API functions.  */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+/* Get _get_osfhandle.  */
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+#endif
+
+#include "macros.h"
+
+/* Return non-zero if FD is open.  */
+static int
+is_open (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  /* On native Windows, the initial state of unassigned standard file
+     descriptors is that they are open but point to an
+     INVALID_HANDLE_VALUE, and there is no fcntl.  */
+  return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
+#else
+# ifndef F_GETFL
+#  error Please port fcntl to your platform
+# endif
+  return 0 <= fcntl (fd, F_GETFL);
+#endif
+}
+
+#if GNULIB_TEST_CLOEXEC
+/* Return non-zero if FD is open and inheritable across exec/spawn.  */
+static int
+is_inheritable (int fd)
+{
+# if defined _WIN32 && ! defined __CYGWIN__
+  /* On native Windows, the initial state of unassigned standard file
+     descriptors is that they are open but point to an
+     INVALID_HANDLE_VALUE, and there is no fcntl.  */
+  HANDLE h = (HANDLE) _get_osfhandle (fd);
+  DWORD flags;
+  if (h == INVALID_HANDLE_VALUE || GetHandleInformation (h, &flags) == 0)
+    return 0;
+  return (flags & HANDLE_FLAG_INHERIT) != 0;
+# else
+#  ifndef F_GETFD
+#   error Please port fcntl to your platform
+#  endif
+  int i = fcntl (fd, F_GETFD);
+  return 0 <= i && (i & FD_CLOEXEC) == 0;
+# endif
+}
+#endif /* GNULIB_TEST_CLOEXEC */
+
+#if !O_BINARY
+# define set_binary_mode(f,m) zero ()
+static int zero (void) { return 0; }
+#endif
+
+/* Return non-zero if FD is open in the given MODE, which is either
+   O_TEXT or O_BINARY.  */
+static int
+is_mode (int fd, int mode)
+{
+  int value = set_binary_mode (fd, O_BINARY);
+  set_binary_mode (fd, value);
+  return mode == value;
+}
+
+int
+main (void)
+{
+  const char *file = "test-dup2.tmp";
+  char buffer[1];
+  int bad_fd = getdtablesize ();
+  int fd = open (file, O_CREAT | O_TRUNC | O_RDWR, 0600);
+
+  /* Assume std descriptors were provided by invoker.  */
+  ASSERT (STDERR_FILENO < fd);
+  ASSERT (is_open (fd));
+  /* Ignore any other fd's leaked into this process.  */
+  close (fd + 1);
+  close (fd + 2);
+  ASSERT (!is_open (fd + 1));
+  ASSERT (!is_open (fd + 2));
+
+  /* Assigning to self must be a no-op.  */
+  ASSERT (dup2 (fd, fd) == fd);
+  ASSERT (is_open (fd));
+
+  /* The source must be valid.  */
+  errno = 0;
+  ASSERT (dup2 (-1, fd) == -1);
+  ASSERT (errno == EBADF);
+  close (99);
+  errno = 0;
+  ASSERT (dup2 (99, fd) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (dup2 (AT_FDCWD, fd) == -1);
+  ASSERT (errno == EBADF);
+  ASSERT (is_open (fd));
+
+  /* If the source is not open, then the destination is unaffected.  */
+  errno = 0;
+  ASSERT (dup2 (fd + 1, fd + 1) == -1);
+  ASSERT (errno == EBADF);
+  ASSERT (!is_open (fd + 1));
+  errno = 0;
+  ASSERT (dup2 (fd + 1, fd) == -1);
+  ASSERT (errno == EBADF);
+  ASSERT (is_open (fd));
+
+  /* The destination must be valid.  */
+  errno = 0;
+  ASSERT (dup2 (fd, -2) == -1);
+  ASSERT (errno == EBADF);
+  if (bad_fd > 256)
+    {
+      ASSERT (dup2 (fd, 255) == 255);
+      ASSERT (dup2 (fd, 256) == 256);
+      ASSERT (close (255) == 0);
+      ASSERT (close (256) == 0);
+    }
+  ASSERT (dup2 (fd, bad_fd - 1) == bad_fd - 1);
+  ASSERT (close (bad_fd - 1) == 0);
+  errno = 0;
+  ASSERT (dup2 (fd, bad_fd) == -1);
+  ASSERT (errno == EBADF);
+
+  /* Using dup2 can skip fds.  */
+  ASSERT (dup2 (fd, fd + 2) == fd + 2);
+  ASSERT (is_open (fd));
+  ASSERT (!is_open (fd + 1));
+  ASSERT (is_open (fd + 2));
+
+  /* Verify that dup2 closes the previous occupant of a fd.  */
+  ASSERT (open ("/dev/null", O_WRONLY, 0600) == fd + 1);
+  ASSERT (dup2 (fd + 1, fd) == fd);
+  ASSERT (close (fd + 1) == 0);
+  ASSERT (write (fd, "1", 1) == 1);
+  ASSERT (dup2 (fd + 2, fd) == fd);
+  ASSERT (lseek (fd, 0, SEEK_END) == 0);
+  ASSERT (write (fd + 2, "2", 1) == 1);
+  ASSERT (lseek (fd, 0, SEEK_SET) == 0);
+  ASSERT (read (fd, buffer, 1) == 1);
+  ASSERT (*buffer == '2');
+
+#if GNULIB_TEST_CLOEXEC
+  /* Any new fd created by dup2 must not be cloexec.  */
+  ASSERT (close (fd + 2) == 0);
+  ASSERT (dup_cloexec (fd) == fd + 1);
+  ASSERT (!is_inheritable (fd + 1));
+  ASSERT (dup2 (fd + 1, fd + 1) == fd + 1);
+  ASSERT (!is_inheritable (fd + 1));
+  ASSERT (dup2 (fd + 1, fd + 2) == fd + 2);
+  ASSERT (!is_inheritable (fd + 1));
+  ASSERT (is_inheritable (fd + 2));
+  errno = 0;
+  ASSERT (dup2 (fd + 1, -1) == -1);
+  ASSERT (errno == EBADF);
+  ASSERT (!is_inheritable (fd + 1));
+#endif
+
+  /* On systems that distinguish between text and binary mode, dup2
+     reuses the mode of the source.  */
+  set_binary_mode (fd, O_BINARY);
+  ASSERT (is_mode (fd, O_BINARY));
+  ASSERT (dup2 (fd, fd + 1) == fd + 1);
+  ASSERT (is_mode (fd + 1, O_BINARY));
+  set_binary_mode (fd, O_TEXT);
+  ASSERT (is_mode (fd, O_TEXT));
+  ASSERT (dup2 (fd, fd + 1) == fd + 1);
+  ASSERT (is_mode (fd + 1, O_TEXT));
+
+  /* Clean up.  */
+  ASSERT (close (fd + 2) == 0);
+  ASSERT (close (fd + 1) == 0);
+  ASSERT (close (fd) == 0);
+  ASSERT (unlink (file) == 0);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-dynarray.c b/src/grep/gnulib-tests/test-dynarray.c
new file mode 100644
index 0000000..c3f9a29
--- /dev/null
+++ b/src/grep/gnulib-tests/test-dynarray.c
@@ -0,0 +1,53 @@
+/* Test of type-safe arrays that grow dynamically.
+   Copyright (C) 2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2021.  */
+
+#include <config.h>
+
+#define DYNARRAY_STRUCT int_sequence
+#define DYNARRAY_ELEMENT int
+#define DYNARRAY_PREFIX intseq_
+#include "dynarray.h"
+
+#include "macros.h"
+
+#define N 100000
+
+static int
+value_at (long long int i)
+{
+  return (i % 13) + ((i * i) % 251);
+}
+
+int
+main ()
+{
+  struct int_sequence s;
+  int i;
+
+  intseq_init (&s);
+  for (i = 0; i < N; i++)
+    intseq_add (&s, value_at (i));
+  for (i = N - 1; i >= N / 2; i--)
+    {
+      ASSERT (* intseq_at (&s, i) == value_at (i));
+      intseq_remove_last (&s);
+    }
+  intseq_free (&s);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-environ.c b/src/grep/gnulib-tests/test-environ.c
new file mode 100644
index 0000000..2935e43
--- /dev/null
+++ b/src/grep/gnulib-tests/test-environ.c
@@ -0,0 +1,44 @@
+/* Test of environ variable.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include <string.h>
+
+int
+main ()
+{
+  /* The environment variables that are set even in the weirdest situations
+     are HOME and PATH.
+     POSIX says that HOME is initialized by the system, and that PATH may be
+     unset.  But in practice it's more frequent to see HOME unset and PATH
+     set.  So we test the presence of PATH.  */
+  char **remaining_variables = environ;
+  char *string;
+
+  for (; (string = *remaining_variables) != NULL; remaining_variables++)
+    {
+      if (strncmp (string, "PATH=", 5) == 0)
+        /* Found the PATH environment variable.  */
+        return 0;
+    }
+  /* Failed to find the PATH environment variable.  */
+  return 1;
+}
diff --git a/src/grep/gnulib-tests/test-errno.c b/src/grep/gnulib-tests/test-errno.c
new file mode 100644
index 0000000..59c5344
--- /dev/null
+++ b/src/grep/gnulib-tests/test-errno.c
@@ -0,0 +1,119 @@
+/* Test of <errno.h> substitute.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include <errno.h>
+
+/* Verify that the POSIX mandated errno values exist and can be used as
+   initializers outside of a function.
+   The variable names happen to match the Linux/x86 error numbers.  */
+int e1 = EPERM;
+int e2 = ENOENT;
+int e3 = ESRCH;
+int e4 = EINTR;
+int e5 = EIO;
+int e6 = ENXIO;
+int e7 = E2BIG;
+int e8 = ENOEXEC;
+int e9 = EBADF;
+int e10 = ECHILD;
+int e11 = EAGAIN;
+int e11a = EWOULDBLOCK;
+int e12 = ENOMEM;
+int e13 = EACCES;
+int e14 = EFAULT;
+int e16 = EBUSY;
+int e17 = EEXIST;
+int e18 = EXDEV;
+int e19 = ENODEV;
+int e20 = ENOTDIR;
+int e21 = EISDIR;
+int e22 = EINVAL;
+int e23 = ENFILE;
+int e24 = EMFILE;
+int e25 = ENOTTY;
+int e26 = ETXTBSY;
+int e27 = EFBIG;
+int e28 = ENOSPC;
+int e29 = ESPIPE;
+int e30 = EROFS;
+int e31 = EMLINK;
+int e32 = EPIPE;
+int e33 = EDOM;
+int e34 = ERANGE;
+int e35 = EDEADLK;
+int e36 = ENAMETOOLONG;
+int e37 = ENOLCK;
+int e38 = ENOSYS;
+int e39 = ENOTEMPTY;
+int e40 = ELOOP;
+int e42 = ENOMSG;
+int e43 = EIDRM;
+int e67 = ENOLINK;
+int e71 = EPROTO;
+int e72 = EMULTIHOP;
+int e74 = EBADMSG;
+int e75 = EOVERFLOW;
+int e84 = EILSEQ;
+int e88 = ENOTSOCK;
+int e89 = EDESTADDRREQ;
+int e90 = EMSGSIZE;
+int e91 = EPROTOTYPE;
+int e92 = ENOPROTOOPT;
+int e93 = EPROTONOSUPPORT;
+int e95 = EOPNOTSUPP;
+int e95a = ENOTSUP;
+int e97 = EAFNOSUPPORT;
+int e98 = EADDRINUSE;
+int e99 = EADDRNOTAVAIL;
+int e100 = ENETDOWN;
+int e101 = ENETUNREACH;
+int e102 = ENETRESET;
+int e103 = ECONNABORTED;
+int e104 = ECONNRESET;
+int e105 = ENOBUFS;
+int e106 = EISCONN;
+int e107 = ENOTCONN;
+int e110 = ETIMEDOUT;
+int e111 = ECONNREFUSED;
+int e113 = EHOSTUNREACH;
+int e114 = EALREADY;
+int e115 = EINPROGRESS;
+int e116 = ESTALE;
+int e122 = EDQUOT;
+int e125 = ECANCELED;
+int e130 = EOWNERDEAD;
+int e131 = ENOTRECOVERABLE;
+
+/* Don't verify that these errno values are all different, except for possibly
+   EWOULDBLOCK == EAGAIN.  Even Linux/x86 does not pass this check: it has
+   ENOTSUP == EOPNOTSUPP.  */
+
+int
+main ()
+{
+  /* Verify that errno can be assigned.  */
+  errno = EOVERFLOW;
+
+  /* snprintf() callers want to distinguish EINVAL and EOVERFLOW.  */
+  if (errno == EINVAL)
+    return 1;
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-exclude.c b/src/grep/gnulib-tests/test-exclude.c
new file mode 100644
index 0000000..1f4baf3
--- /dev/null
+++ b/src/grep/gnulib-tests/test-exclude.c
@@ -0,0 +1,128 @@
+/* Test suite for exclude.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+   This file is part of the GNUlib Library.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <stdbool.h>
+#include <fnmatch.h>
+
+#include "exclude.h"
+#include "error.h"
+#include "argmatch.h"
+
+#ifndef FNM_CASEFOLD
+# define FNM_CASEFOLD 0
+#endif
+#ifndef FNM_LEADING_DIR
+# define FNM_LEADING_DIR 0
+#endif
+
+char const * const exclude_keywords[] = {
+  "noescape",
+  "pathname",
+  "period",
+  "leading_dir",
+  "casefold",
+  "anchored",
+  "include",
+  "wildcards",
+  NULL
+};
+
+int exclude_flags[] = {
+  FNM_NOESCAPE,
+  FNM_PATHNAME,
+  FNM_PERIOD,
+  FNM_LEADING_DIR,
+  FNM_CASEFOLD,
+  EXCLUDE_ANCHORED,
+  EXCLUDE_INCLUDE,
+  EXCLUDE_WILDCARDS
+};
+
+ARGMATCH_VERIFY (exclude_keywords, exclude_flags);
+
+/* Some packages define ARGMATCH_DIE and ARGMATCH_DIE_DECL in <config.h>, and
+   thus must link with a definition of that function.  Provide it here.  */
+#ifdef ARGMATCH_DIE_DECL
+
+_Noreturn ARGMATCH_DIE_DECL;
+ARGMATCH_DIE_DECL { exit (1); }
+
+#endif
+
+int
+main (int argc, char **argv)
+{
+  int exclude_options = 0;
+  struct exclude *exclude = new_exclude ();
+
+  if (argc == 1)
+    error (1, 0, "usage: %s file -- words...", argv[0]);
+
+  while (--argc)
+    {
+      char *opt = *++argv;
+      if (opt[0] == '-')
+        {
+          int neg = 0;
+          int flag;
+          char *s = opt + 1;
+
+          if (opt[1] == '-' && opt[2] == 0)
+            {
+              argc--;
+              break;
+            }
+          if (strlen (s) > 3 && memcmp (s, "no-", 3) == 0)
+            {
+              neg = 1;
+              s += 3;
+            }
+          flag = XARGMATCH (opt, s, exclude_keywords, exclude_flags);
+          if (neg)
+            exclude_options &= ~flag;
+          else
+            exclude_options |= flag;
+
+          /* Skip this test if invoked with -leading-dir on a system that
+             lacks support for FNM_LEADING_DIR. */
+          if (strcmp (s, "leading_dir") == 0 && FNM_LEADING_DIR == 0)
+            exit (77);
+
+          /* Likewise for -casefold and FNM_CASEFOLD.  */
+          if (strcmp (s, "casefold") == 0 && FNM_CASEFOLD == 0)
+            exit (77);
+        }
+      else if (add_exclude_file (add_exclude, exclude, opt,
+                                 exclude_options, '\n') != 0)
+        error (1, errno, "error loading %s", opt);
+    }
+
+  for (; argc; --argc)
+    {
+      char *word = *++argv;
+
+      printf ("%s: %d\n", word, excluded_file_name (exclude, word));
+    }
+
+  free_exclude (exclude);
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-exclude1.sh b/src/grep/gnulib-tests/test-exclude1.sh
new file mode 100755
index 0000000..613994c
--- /dev/null
+++ b/src/grep/gnulib-tests/test-exclude1.sh
@@ -0,0 +1,50 @@
+#! /bin/sh
+# Test suite for exclude.
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+# This file is part of the GNUlib Library.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ .
+fail=0
+
+# Test literal matches
+
+cat > in <<EOT
+foo*
+bar
+Baz
+EOT
+
+cat > expected <<EOT
+foo: 0
+foo*: 1
+bar: 1
+foobar: 0
+baz: 0
+bar/qux: 0
+EOT
+
+${CHECKER} test-exclude in -- foo 'foo*' bar foobar baz bar/qux > out || exit $?
+
+# Find out how to remove carriage returns from output. Solaris /usr/ucb/tr
+# does not understand '\r'.
+case $(echo r | tr -d '\r') in '') cr='\015';; *) cr='\r';; esac
+
+# normalize output
+LC_ALL=C tr -d "$cr" < out > k && mv k out
+
+compare expected out || fail=1
+
+Exit $fail
diff --git a/src/grep/gnulib-tests/test-exclude2.sh b/src/grep/gnulib-tests/test-exclude2.sh
new file mode 100755
index 0000000..a0d078d
--- /dev/null
+++ b/src/grep/gnulib-tests/test-exclude2.sh
@@ -0,0 +1,50 @@
+#! /bin/sh
+# Test suite for exclude.
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+# This file is part of the GNUlib Library.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ .
+fail=0
+
+cat > in <<EOT
+foo*
+bar
+Baz
+EOT
+
+# Test case-insensitive literal matches
+
+cat > expected <<EOT
+foo: 0
+foo*: 1
+bar: 1
+foobar: 0
+baz: 1
+bar/qux: 0
+EOT
+
+${CHECKER} test-exclude -casefold in -- foo 'foo*' bar foobar baz bar/qux > out || exit $?
+
+# Find out how to remove carriage returns from output. Solaris /usr/ucb/tr
+# does not understand '\r'.
+case $(echo r | tr -d '\r') in '') cr='\015';; *) cr='\r';; esac
+
+# normalize output
+LC_ALL=C tr -d "$cr" < out > k && mv k out
+
+compare expected out || fail=1
+
+Exit $fail
diff --git a/src/grep/gnulib-tests/test-exclude3.sh b/src/grep/gnulib-tests/test-exclude3.sh
new file mode 100755
index 0000000..3c6c9a9
--- /dev/null
+++ b/src/grep/gnulib-tests/test-exclude3.sh
@@ -0,0 +1,50 @@
+#! /bin/sh
+# Test suite for exclude.
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+# This file is part of the GNUlib Library.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ .
+fail=0
+
+# Test include
+
+cat > in <<EOT
+foo*
+bar
+Baz
+EOT
+
+cat > expected <<EOT
+foo: 1
+foo*: 0
+bar: 0
+foobar: 1
+baz: 1
+bar/qux: 1
+EOT
+
+${CHECKER} test-exclude -include in -- foo 'foo*' bar foobar baz bar/qux > out || exit $?
+
+# Find out how to remove carriage returns from output. Solaris /usr/ucb/tr
+# does not understand '\r'.
+case $(echo r | tr -d '\r') in '') cr='\015';; *) cr='\r';; esac
+
+# normalize output
+LC_ALL=C tr -d "$cr" < out > k && mv k out
+
+compare expected out || fail=1
+
+Exit $fail
diff --git a/src/grep/gnulib-tests/test-exclude4.sh b/src/grep/gnulib-tests/test-exclude4.sh
new file mode 100755
index 0000000..8fa1405
--- /dev/null
+++ b/src/grep/gnulib-tests/test-exclude4.sh
@@ -0,0 +1,45 @@
+#! /bin/sh
+# Test suite for exclude.
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+# This file is part of the GNUlib Library.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ .
+fail=0
+
+# Test wildcard matching
+
+cat > in <<EOT
+foo*
+bar
+Baz
+EOT
+
+cat > expected <<EOT
+foobar: 1
+EOT
+
+${CHECKER} test-exclude -wildcards in -- foobar > out || exit $?
+
+# Find out how to remove carriage returns from output. Solaris /usr/ucb/tr
+# does not understand '\r'.
+case $(echo r | tr -d '\r') in '') cr='\015';; *) cr='\r';; esac
+
+# normalize output
+LC_ALL=C tr -d "$cr" < out > k && mv k out
+
+compare expected out || fail=1
+
+Exit $fail
diff --git a/src/grep/gnulib-tests/test-exclude5.sh b/src/grep/gnulib-tests/test-exclude5.sh
new file mode 100755
index 0000000..86dfc49
--- /dev/null
+++ b/src/grep/gnulib-tests/test-exclude5.sh
@@ -0,0 +1,48 @@
+#! /bin/sh
+# Test suite for exclude.
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+# This file is part of the GNUlib Library.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ .
+fail=0
+
+# Test FNM_LEADING_DIR
+
+cat > in <<EOT
+foo*
+bar
+Baz
+EOT
+
+cat > expected <<EOT
+bar: 1
+bar/qux: 1
+barz: 0
+foo/bar: 1
+EOT
+
+${CHECKER} test-exclude -leading_dir in -- bar bar/qux barz foo/bar > out || exit $?
+
+# Find out how to remove carriage returns from output. Solaris /usr/ucb/tr
+# does not understand '\r'.
+case $(echo r | tr -d '\r') in '') cr='\015';; *) cr='\r';; esac
+
+# normalize output
+LC_ALL=C tr -d "$cr" < out > k && mv k out
+
+compare expected out || fail=1
+
+Exit $fail
diff --git a/src/grep/gnulib-tests/test-exclude6.sh b/src/grep/gnulib-tests/test-exclude6.sh
new file mode 100755
index 0000000..87dfe3a
--- /dev/null
+++ b/src/grep/gnulib-tests/test-exclude6.sh
@@ -0,0 +1,46 @@
+#! /bin/sh
+# Test suite for exclude.
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+# This file is part of the GNUlib Library.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ .
+fail=0
+
+# Test anchored
+
+cat > in <<EOT
+foo*
+bar
+Baz
+EOT
+
+cat > expected <<EOT
+bar: 1
+foo/bar: 0
+EOT
+
+${CHECKER} test-exclude -anchored in -- bar foo/bar > out || exit $?
+
+# Find out how to remove carriage returns from output. Solaris /usr/ucb/tr
+# does not understand '\r'.
+case $(echo r | tr -d '\r') in '') cr='\015';; *) cr='\r';; esac
+
+# normalize output
+LC_ALL=C tr -d "$cr" < out > k && mv k out
+
+compare expected out || fail=1
+
+Exit $fail
diff --git a/src/grep/gnulib-tests/test-exclude7.sh b/src/grep/gnulib-tests/test-exclude7.sh
new file mode 100755
index 0000000..ed09185
--- /dev/null
+++ b/src/grep/gnulib-tests/test-exclude7.sh
@@ -0,0 +1,47 @@
+#! /bin/sh
+# Test suite for exclude.
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+# This file is part of the GNUlib Library.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ .
+fail=0
+
+# Test exclude precedence
+
+cat > in <<EOT
+foo*
+bar
+Baz
+EOT
+
+cat > expected <<EOT
+bar: 0
+bar: 1
+EOT
+
+${CHECKER} test-exclude in -include in -- bar > out || exit $?
+${CHECKER} test-exclude -include in -no-include in -- bar >> out || exit $?
+
+# Find out how to remove carriage returns from output. Solaris /usr/ucb/tr
+# does not understand '\r'.
+case $(echo r | tr -d '\r') in '') cr='\015';; *) cr='\r';; esac
+
+# normalize output
+LC_ALL=C tr -d "$cr" < out > k && mv k out
+
+compare expected out || fail=1
+
+Exit $fail
diff --git a/src/grep/gnulib-tests/test-exclude8.sh b/src/grep/gnulib-tests/test-exclude8.sh
new file mode 100755
index 0000000..e4f6791
--- /dev/null
+++ b/src/grep/gnulib-tests/test-exclude8.sh
@@ -0,0 +1,46 @@
+#! /bin/sh
+# Test suite for exclude.
+# Copyright (C) 2010-2021 Free Software Foundation, Inc.
+# This file is part of the GNUlib Library.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ .
+fail=0
+
+# Test escaped metacharacters.
+
+cat > in <<'EOT'
+f\*e
+b[a\*]r
+EOT
+
+cat > expected <<'EOT'
+f*e: 1
+file: 0
+bar: 1
+EOT
+
+${CHECKER} test-exclude -wildcards in -- 'f*e' 'file' 'bar' > out || exit $?
+
+# Find out how to remove carriage returns from output. Solaris /usr/ucb/tr
+# does not understand '\r'.
+case $(echo r | tr -d '\r') in '') cr='\015';; *) cr='\r';; esac
+
+# normalize output
+LC_ALL=C tr -d "$cr" < out > k && mv k out
+
+compare expected out || fail=1
+
+Exit $fail
diff --git a/src/grep/gnulib-tests/test-fchdir.c b/src/grep/gnulib-tests/test-fchdir.c
new file mode 100644
index 0000000..8ee4508
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fchdir.c
@@ -0,0 +1,110 @@
+/* Test changing to a directory named by a file descriptor.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fchdir, int, (int));
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "cloexec.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  char *cwd;
+  int fd;
+  int i;
+
+  cwd = getcwd (NULL, 0);
+  ASSERT (cwd);
+
+  fd = open (".", O_RDONLY);
+  ASSERT (0 <= fd);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    errno = 0;
+    ASSERT (fchdir (-1) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    close (99);
+    errno = 0;
+    ASSERT (fchdir (99) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  /* Check for other failure cases.  */
+  {
+    int bad_fd = open ("/dev/null", O_RDONLY);
+    ASSERT (0 <= bad_fd);
+    errno = 0;
+    ASSERT (fchdir (bad_fd) == -1);
+    ASSERT (errno == ENOTDIR);
+    ASSERT (close (bad_fd) == 0);
+  }
+
+  /* Repeat test twice, once in '.' and once in '..'.  */
+  for (i = 0; i < 2; i++)
+    {
+      ASSERT (chdir (&".."[1 - i]) == 0);
+      ASSERT (fchdir (fd) == 0);
+      {
+        size_t len = strlen (cwd) + 1;
+        char *new_dir = malloc (len);
+        ASSERT (new_dir);
+        ASSERT (getcwd (new_dir, len) == new_dir);
+        ASSERT (strcmp (cwd, new_dir) == 0);
+        free (new_dir);
+      }
+
+      /* For second iteration, use a cloned fd, to ensure that dup
+         remembers whether an fd was associated with a directory.  */
+      if (!i)
+        {
+          int new_fd = dup (fd);
+          ASSERT (0 <= new_fd);
+          ASSERT (close (fd) == 0);
+          ASSERT (dup2 (new_fd, fd) == fd);
+          ASSERT (close (new_fd) == 0);
+          ASSERT (dup_cloexec (fd) == new_fd);
+          ASSERT (dup2 (new_fd, fd) == fd);
+          ASSERT (close (new_fd) == 0);
+          ASSERT (fcntl (fd, F_DUPFD_CLOEXEC, new_fd) == new_fd);
+          ASSERT (close (fd) == 0);
+          ASSERT (fcntl (new_fd, F_DUPFD, fd) == fd);
+          ASSERT (close (new_fd) == 0);
+#if GNULIB_TEST_DUP3
+          ASSERT (dup3 (fd, new_fd, 0) == new_fd);
+          ASSERT (dup3 (new_fd, fd, 0) == fd);
+          ASSERT (close (new_fd) == 0);
+#endif
+        }
+    }
+
+  free (cwd);
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-fcntl-h.c b/src/grep/gnulib-tests/test-fcntl-h.c
new file mode 100644
index 0000000..ab25cf7
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fcntl-h.c
@@ -0,0 +1,130 @@
+/* Test of <fcntl.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <fcntl.h>
+
+/* Check that the various O_* macros are defined.  */
+int o = (O_DIRECT | O_DIRECTORY | O_DSYNC | O_IGNORE_CTTY | O_NDELAY | O_NOATIME
+         | O_NONBLOCK | O_NOCTTY | O_NOFOLLOW | O_NOLINK | O_NOLINKS | O_NOTRANS
+         | O_RSYNC | O_SYNC | O_TTY_INIT | O_BINARY | O_TEXT);
+
+/* Check that the various SEEK_* macros are defined.  */
+int sk[] = { SEEK_CUR, SEEK_END, SEEK_SET };
+
+/* Check that the FD_* macros are defined.  */
+int i = FD_CLOEXEC;
+
+/* Check that the types are all defined.  */
+pid_t t1;
+off_t t2;
+mode_t t3;
+
+int
+main (void)
+{
+  /* Ensure no overlap in SEEK_*. */
+  switch (0)
+    {
+    case SEEK_CUR:
+    case SEEK_END:
+    case SEEK_SET:
+      ;
+    }
+
+  /* Ensure no dangerous overlap in non-zero gnulib-defined replacements.  */
+  switch (O_RDONLY)
+    {
+      /* Access modes */
+    case O_RDONLY:
+    case O_WRONLY:
+    case O_RDWR:
+#if O_EXEC && O_EXEC != O_RDONLY
+    case O_EXEC:
+#endif
+#if O_SEARCH && O_EXEC != O_SEARCH && O_SEARCH != O_RDONLY
+    case O_SEARCH:
+#endif
+      i = ! (~O_ACCMODE & (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH));
+      break;
+
+      /* Everyone should have these */
+    case O_CREAT:
+    case O_EXCL:
+    case O_TRUNC:
+    case O_APPEND:
+      break;
+
+      /* These might be 0 or O_RDONLY, only test non-zero versions.  */
+#if O_CLOEXEC
+    case O_CLOEXEC:
+#endif
+#if O_DIRECT
+    case O_DIRECT:
+#endif
+#if O_DIRECTORY
+    case O_DIRECTORY:
+#endif
+#if O_DSYNC
+    case O_DSYNC:
+#endif
+#if O_IGNORE_CTTY
+    case O_IGNORE_CTTY:
+#endif
+#if O_NOATIME
+    case O_NOATIME:
+#endif
+#if O_NONBLOCK
+    case O_NONBLOCK:
+#endif
+#if O_NOCTTY
+    case O_NOCTTY:
+#endif
+#if O_NOFOLLOW
+    case O_NOFOLLOW:
+#endif
+#if O_NOLINK
+    case O_NOLINK:
+#endif
+#if O_NOLINKS
+    case O_NOLINKS:
+#endif
+#if O_NOTRANS
+    case O_NOTRANS:
+#endif
+#if O_RSYNC && O_RSYNC != O_DSYNC
+    case O_RSYNC:
+#endif
+#if O_SYNC && O_SYNC != O_DSYNC && O_SYNC != O_RSYNC
+    case O_SYNC:
+#endif
+#if O_TTY_INIT
+    case O_TTY_INIT:
+#endif
+#if O_BINARY
+    case O_BINARY:
+#endif
+#if O_TEXT
+    case O_TEXT:
+#endif
+      ;
+    }
+
+  return !i;
+}
diff --git a/src/grep/gnulib-tests/test-fcntl-safer.c b/src/grep/gnulib-tests/test-fcntl-safer.c
new file mode 100644
index 0000000..e6b2379
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fcntl-safer.c
@@ -0,0 +1,38 @@
+/* Test of opening a file descriptor.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include "fcntl--.h"
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#define BASE "test-fcntl-safer.t"
+
+#include "test-open.h"
+
+int
+main (void)
+{
+  return test_open (open, true);
+}
diff --git a/src/grep/gnulib-tests/test-fcntl.c b/src/grep/gnulib-tests/test-fcntl.c
new file mode 100644
index 0000000..cb834b4
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fcntl.c
@@ -0,0 +1,435 @@
+/* Test of fcntl(2).
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <fcntl.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fcntl, int, (int, int, ...));
+
+/* Helpers.  */
+#include <errno.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <unistd.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Get declarations of the native Windows API functions.  */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+/* Get _get_osfhandle.  */
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+#endif
+
+#include "binary-io.h"
+#include "macros.h"
+
+#if !O_BINARY
+# define set_binary_mode(f,m) zero ()
+static int zero (void) { return 0; }
+#endif
+
+/* Return true if FD is open.  */
+static bool
+is_open (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  /* On native Windows, the initial state of unassigned standard file
+     descriptors is that they are open but point to an
+     INVALID_HANDLE_VALUE, and there is no fcntl.  */
+  return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
+#else
+# ifndef F_GETFL
+#  error Please port fcntl to your platform
+# endif
+  return 0 <= fcntl (fd, F_GETFL);
+#endif
+}
+
+/* Return true if FD is open and inheritable across exec/spawn.  */
+static bool
+is_inheritable (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  /* On native Windows, the initial state of unassigned standard file
+     descriptors is that they are open but point to an
+     INVALID_HANDLE_VALUE, and there is no fcntl.  */
+  HANDLE h = (HANDLE) _get_osfhandle (fd);
+  DWORD flags;
+  if (h == INVALID_HANDLE_VALUE || GetHandleInformation (h, &flags) == 0)
+    return false;
+  return (flags & HANDLE_FLAG_INHERIT) != 0;
+#else
+# ifndef F_GETFD
+#  error Please port fcntl to your platform
+# endif
+  int i = fcntl (fd, F_GETFD);
+  return 0 <= i && (i & FD_CLOEXEC) == 0;
+#endif
+}
+
+/* Return non-zero if FD is open in the given MODE, which is either
+   O_TEXT or O_BINARY.  */
+static bool
+is_mode (int fd, int mode)
+{
+  int value = set_binary_mode (fd, O_BINARY);
+  set_binary_mode (fd, value);
+  return mode == value;
+}
+
+/* Since native fcntl can have more supported operations than our
+   replacement is aware of, and since various operations assign
+   different types to the vararg argument, a wrapper around fcntl must
+   be able to pass a vararg of unknown type on through to the original
+   fcntl.  Make sure that this works properly: func1 behaves like the
+   original fcntl interpreting the vararg as an int or a pointer to a
+   struct, and func2 behaves like rpl_fcntl that doesn't know what
+   type to forward.  */
+struct dummy_struct
+{
+  long filler;
+  int value;
+};
+static int
+func1 (int a, ...)
+{
+  va_list arg;
+  int i;
+  va_start (arg, a);
+  if (a < 4)
+    i = va_arg (arg, int);
+  else
+    {
+      struct dummy_struct *s = va_arg (arg, struct dummy_struct *);
+      i = s->value;
+    }
+  va_end (arg);
+  return i;
+}
+static int
+func2 (int a, ...)
+{
+  va_list arg;
+  void *p;
+  va_start (arg, a);
+  p = va_arg (arg, void *);
+  va_end (arg);
+  return func1 (a, p);
+}
+
+/* Ensure that all supported fcntl actions are distinct, and
+   usable in preprocessor expressions.  */
+static void
+check_flags (void)
+{
+  switch (0)
+    {
+    case F_DUPFD:
+#if F_DUPFD
+#endif
+
+    case F_DUPFD_CLOEXEC:
+#if F_DUPFD_CLOEXEC
+#endif
+
+    case F_GETFD:
+#if F_GETFD
+#endif
+
+#ifdef F_SETFD
+    case F_SETFD:
+# if F_SETFD
+# endif
+#endif
+
+#ifdef F_GETFL
+    case F_GETFL:
+# if F_GETFL
+# endif
+#endif
+
+#ifdef F_SETFL
+    case F_SETFL:
+# if F_SETFL
+# endif
+#endif
+
+#ifdef F_GETOWN
+    case F_GETOWN:
+# if F_GETOWN
+# endif
+#endif
+
+#ifdef F_SETOWN
+    case F_SETOWN:
+# if F_SETOWN
+# endif
+#endif
+
+#ifdef F_GETLK
+    case F_GETLK:
+# if F_GETLK
+# endif
+#endif
+
+#ifdef F_SETLK
+    case F_SETLK:
+# if F_SETLK
+# endif
+#endif
+
+#ifdef F_SETLKW
+    case F_SETLKW:
+# if F_SETLKW
+# endif
+#endif
+
+    default:
+      ;
+    }
+}
+
+int
+main (int argc, char *argv[])
+{
+  if (argc > 1)
+    /* child process */
+    return (is_open (10) ? 42 : 0);
+
+  const char *file = "test-fcntl.tmp";
+  int fd;
+  int bad_fd = getdtablesize ();
+
+  /* Sanity check that rpl_fcntl is likely to work.  */
+  ASSERT (func2 (1, 2) == 2);
+  ASSERT (func2 (2, -2) == -2);
+  ASSERT (func2 (3, 0x80000000) == 0x80000000);
+  {
+    struct dummy_struct s = { 0L, 4 };
+    ASSERT (func2 (4, &s) == 4);
+  }
+  check_flags ();
+
+  /* Assume std descriptors were provided by invoker, and ignore fds
+     that might have been inherited.  */
+  fd = creat (file, 0600);
+  ASSERT (STDERR_FILENO < fd);
+  close (fd + 1);
+  close (fd + 2);
+
+  /* For F_DUPFD*, the source must be valid.  */
+  errno = 0;
+  ASSERT (fcntl (-1, F_DUPFD, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (fd + 1, F_DUPFD, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (bad_fd, F_DUPFD, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (-1, F_DUPFD_CLOEXEC, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (fd + 1, F_DUPFD_CLOEXEC, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (bad_fd, F_DUPFD_CLOEXEC, 0) == -1);
+  ASSERT (errno == EBADF);
+
+  /* For F_DUPFD*, the destination must be valid.  */
+  errno = 0;
+  ASSERT (fcntl (fd, F_DUPFD, -1) == -1);
+  ASSERT (errno == EINVAL);
+  errno = 0;
+  ASSERT (fcntl (fd, F_DUPFD, bad_fd) == -1);
+  ASSERT (errno == EINVAL);
+  errno = 0;
+  ASSERT (fcntl (fd, F_DUPFD_CLOEXEC, -1) == -1);
+  ASSERT (errno == EINVAL);
+  errno = 0;
+  ASSERT (fcntl (fd, F_DUPFD_CLOEXEC, bad_fd) == -1);
+  ASSERT (errno == EINVAL
+          || errno == EMFILE /* WSL */);
+
+  /* For F_DUPFD*, check for correct inheritance, as well as
+     preservation of text vs. binary.  */
+  set_binary_mode (fd, O_BINARY);
+  ASSERT (is_open (fd));
+  ASSERT (!is_open (fd + 1));
+  ASSERT (!is_open (fd + 2));
+  ASSERT (is_inheritable (fd));
+  ASSERT (is_mode (fd, O_BINARY));
+
+  ASSERT (fcntl (fd, F_DUPFD, fd) == fd + 1);
+  ASSERT (is_open (fd));
+  ASSERT (is_open (fd + 1));
+  ASSERT (!is_open (fd + 2));
+  ASSERT (is_inheritable (fd + 1));
+  ASSERT (is_mode (fd, O_BINARY));
+  ASSERT (is_mode (fd + 1, O_BINARY));
+  ASSERT (close (fd + 1) == 0);
+
+  ASSERT (fcntl (fd, F_DUPFD_CLOEXEC, fd + 2) == fd + 2);
+  ASSERT (is_open (fd));
+  ASSERT (!is_open (fd + 1));
+  ASSERT (is_open (fd + 2));
+  ASSERT (is_inheritable (fd));
+  ASSERT (!is_inheritable (fd + 2));
+  ASSERT (is_mode (fd, O_BINARY));
+  ASSERT (is_mode (fd + 2, O_BINARY));
+  ASSERT (close (fd) == 0);
+
+  set_binary_mode (fd + 2, O_TEXT);
+  ASSERT (fcntl (fd + 2, F_DUPFD, fd + 1) == fd + 1);
+  ASSERT (!is_open (fd));
+  ASSERT (is_open (fd + 1));
+  ASSERT (is_open (fd + 2));
+  ASSERT (is_inheritable (fd + 1));
+  ASSERT (!is_inheritable (fd + 2));
+  ASSERT (is_mode (fd + 1, O_TEXT));
+  ASSERT (is_mode (fd + 2, O_TEXT));
+  ASSERT (close (fd + 1) == 0);
+
+  ASSERT (fcntl (fd + 2, F_DUPFD_CLOEXEC, 0) == fd);
+  ASSERT (is_open (fd));
+  ASSERT (!is_open (fd + 1));
+  ASSERT (is_open (fd + 2));
+  ASSERT (!is_inheritable (fd));
+  ASSERT (!is_inheritable (fd + 2));
+  ASSERT (is_mode (fd, O_TEXT));
+  ASSERT (is_mode (fd + 2, O_TEXT));
+  ASSERT (close (fd + 2) == 0);
+
+  /* Test F_GETFD on invalid file descriptors.  */
+  errno = 0;
+  ASSERT (fcntl (-1, F_GETFD) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (fd + 1, F_GETFD) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (bad_fd, F_GETFD) == -1);
+  ASSERT (errno == EBADF);
+
+  /* Test F_GETFD, the FD_CLOEXEC bit.  */
+  {
+    int result = fcntl (fd, F_GETFD);
+    ASSERT (0 <= result);
+    ASSERT ((result & FD_CLOEXEC) == FD_CLOEXEC);
+    ASSERT (dup (fd) == fd + 1);
+    result = fcntl (fd + 1, F_GETFD);
+    ASSERT (0 <= result);
+    ASSERT ((result & FD_CLOEXEC) == 0);
+    ASSERT (close (fd + 1) == 0);
+  }
+
+#ifdef F_SETFD
+  /* Test F_SETFD on invalid file descriptors.  */
+  errno = 0;
+  ASSERT (fcntl (-1, F_SETFD, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (fd + 1, F_SETFD, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (bad_fd, F_SETFD, 0) == -1);
+  ASSERT (errno == EBADF);
+#endif
+
+#ifdef F_GETFL
+  /* Test F_GETFL on invalid file descriptors.  */
+  errno = 0;
+  ASSERT (fcntl (-1, F_GETFL) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (fd + 1, F_GETFL) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (bad_fd, F_GETFL) == -1);
+  ASSERT (errno == EBADF);
+#endif
+
+#ifdef F_SETFL
+  /* Test F_SETFL on invalid file descriptors.  */
+  errno = 0;
+  ASSERT (fcntl (-1, F_SETFL, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (fd + 1, F_SETFL, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (bad_fd, F_SETFL, 0) == -1);
+  ASSERT (errno == EBADF);
+#endif
+
+#ifdef F_GETOWN
+  /* Test F_GETOWN on invalid file descriptors.  */
+  errno = 0;
+  ASSERT (fcntl (-1, F_GETOWN) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (fd + 1, F_GETOWN) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (bad_fd, F_GETOWN) == -1);
+  ASSERT (errno == EBADF);
+#endif
+
+#ifdef F_SETOWN
+  /* Test F_SETFL on invalid file descriptors.  */
+  errno = 0;
+  ASSERT (fcntl (-1, F_SETOWN, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (fd + 1, F_SETOWN, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (bad_fd, F_SETOWN, 0) == -1);
+  ASSERT (errno == EBADF);
+#endif
+
+  /* Cleanup.  */
+  ASSERT (close (fd) == 0);
+  ASSERT (unlink (file) == 0);
+
+  /* Close file descriptors that may have been inherited from the parent
+     process and that would cause failures below.
+     Such file descriptors have been seen:
+       - with GNU make, when invoked as 'make -j N' with j > 1,
+       - in some versions of the KDE desktop environment,
+       - on NetBSD,
+       - in MacPorts with the "trace mode" enabled.
+   */
+  (void) close (10);
+
+  /* Test whether F_DUPFD_CLOEXEC is effective.  */
+  ASSERT (fcntl (1, F_DUPFD_CLOEXEC, 10) >= 0);
+#if defined _WIN32 && !defined __CYGWIN__
+  return _execl ("./test-fcntl", "./test-fcntl", "child", NULL);
+#else
+  return execl ("./test-fcntl", "./test-fcntl", "child", NULL);
+#endif
+}
diff --git a/src/grep/gnulib-tests/test-fdopen.c b/src/grep/gnulib-tests/test-fdopen.c
new file mode 100644
index 0000000..86793bc
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fdopen.c
@@ -0,0 +1,49 @@
+/* Test opening a stream with a file descriptor.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fdopen, FILE *, (int, const char *));
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  /* Test behavior on failure.  POSIX makes it hard to check for
+     failure, since the behavior is not well-defined on invalid file
+     descriptors, so try fdopen 1000 times and if that's not enough to
+     fail due to EMFILE, so be it.  */
+
+  int i;
+  for (i = 0; i < 1000; i++)
+    {
+      errno = 0;
+      if (! fdopen (STDOUT_FILENO, "w"))
+        {
+          ASSERT (errno != 0);
+          break;
+        }
+    }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-fdopendir.c b/src/grep/gnulib-tests/test-fdopendir.c
new file mode 100644
index 0000000..7d53b8a
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fdopendir.c
@@ -0,0 +1,80 @@
+/* Test opening a directory stream from a file descriptor.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <dirent.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fdopendir, DIR *, (int));
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (int argc _GL_UNUSED, char *argv[])
+{
+  DIR *d;
+  int fd;
+
+  /* A non-directory cannot be turned into a directory stream.  */
+  fd = open ("test-fdopendir.tmp", O_RDONLY | O_CREAT, 0600);
+  ASSERT (0 <= fd);
+  errno = 0;
+  ASSERT (fdopendir (fd) == NULL);
+  ASSERT (errno == ENOTDIR);
+  ASSERT (close (fd) == 0);
+  ASSERT (unlink ("test-fdopendir.tmp") == 0);
+
+  /* A bad fd cannot be turned into a stream.  */
+  {
+    errno = 0;
+    ASSERT (fdopendir (-1) == NULL);
+    ASSERT (errno == EBADF);
+  }
+  {
+    close (99);
+    errno = 0;
+    ASSERT (fdopendir (99) == NULL);
+    ASSERT (errno == EBADF);
+  }
+
+  /* This should work.  */
+  fd = open (".", O_RDONLY);
+  ASSERT (0 <= fd);
+  d = fdopendir (fd);
+  ASSERT (d);
+  /* fdopendir should not close fd.  */
+  ASSERT (dup2 (fd, fd) == fd);
+
+  /* Don't test dirfd here.  dirfd (d) must return fd on current POSIX
+     platforms, but on pre-2008 platforms or on non-POSIX platforms
+     dirfd (fd) might return some other descriptor, or -1, and gnulib
+     does not work around this porting problem.  */
+
+  ASSERT (closedir (d) == 0);
+  /* Now we can guarantee that fd must be closed.  */
+  errno = 0;
+  ASSERT (dup2 (fd, fd) == -1);
+  ASSERT (errno == EBADF);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-fgetc.c b/src/grep/gnulib-tests/test-fgetc.c
new file mode 100644
index 0000000..6faae5c
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fgetc.c
@@ -0,0 +1,99 @@
+/* Test of fgetc() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fgetc, int, (FILE *));
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+# include "msvc-inval.h"
+#endif
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  const char *filename = "test-fgetc.txt";
+
+  /* We don't have an fgetc() function that installs an invalid parameter
+     handler so far.  So install that handler here, explicitly.  */
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
+    && MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
+  gl_msvc_inval_ensure_handler ();
+#endif
+
+  /* Prepare a file.  */
+  {
+    const char text[] = "hello world";
+    int fd = open (filename, O_RDWR | O_CREAT | O_TRUNC, 0600);
+    ASSERT (fd >= 0);
+    ASSERT (write (fd, text, sizeof (text)) == sizeof (text));
+    ASSERT (close (fd) == 0);
+  }
+
+  /* Test that fgetc() sets errno if someone else closes the stream
+     fd behind the back of stdio.  */
+  {
+    FILE *fp = fopen (filename, "r");
+    ASSERT (fp != NULL);
+    ASSERT (close (fileno (fp)) == 0);
+    errno = 0;
+    ASSERT (fgetc (fp) == EOF);
+    ASSERT (errno == EBADF);
+    ASSERT (ferror (fp));
+    fclose (fp);
+  }
+
+  /* Test that fgetc() sets errno if the stream was constructed with
+     an invalid file descriptor.  */
+  {
+    FILE *fp = fdopen (-1, "r");
+    if (fp != NULL)
+      {
+        errno = 0;
+        ASSERT (fgetc (fp) == EOF);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+  {
+    FILE *fp;
+    close (99);
+    fp = fdopen (99, "r");
+    if (fp != NULL)
+      {
+        errno = 0;
+        ASSERT (fgetc (fp) == EOF);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+
+  /* Clean up.  */
+  unlink (filename);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-float.c b/src/grep/gnulib-tests/test-float.c
new file mode 100644
index 0000000..f79e819
--- /dev/null
+++ b/src/grep/gnulib-tests/test-float.c
@@ -0,0 +1,384 @@
+/* Test of <float.h> substitute.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include <float.h>
+
+#include "fpucw.h"
+#include "macros.h"
+
+/* Check that FLT_RADIX is a constant expression.  */
+int a[] = { FLT_RADIX };
+
+#if FLT_RADIX == 2
+
+/* Return 2^n.  */
+static float
+pow2f (int n)
+{
+  int k = n;
+  volatile float x = 1;
+  volatile float y = 2;
+  /* Invariant: 2^n == x * y^k.  */
+  if (k < 0)
+    {
+      y = 0.5f;
+      k = - k;
+    }
+  while (k > 0)
+    {
+      if (k != 2 * (k / 2))
+        {
+          x = x * y;
+          k = k - 1;
+        }
+      if (k == 0)
+        break;
+      y = y * y;
+      k = k / 2;
+    }
+  /* Now k == 0, hence x == 2^n.  */
+  return x;
+}
+
+/* Return 2^n.  */
+static double
+pow2d (int n)
+{
+  int k = n;
+  volatile double x = 1;
+  volatile double y = 2;
+  /* Invariant: 2^n == x * y^k.  */
+  if (k < 0)
+    {
+      y = 0.5;
+      k = - k;
+    }
+  while (k > 0)
+    {
+      if (k != 2 * (k / 2))
+        {
+          x = x * y;
+          k = k - 1;
+        }
+      if (k == 0)
+        break;
+      y = y * y;
+      k = k / 2;
+    }
+  /* Now k == 0, hence x == 2^n.  */
+  return x;
+}
+
+/* Return 2^n.  */
+static long double
+pow2l (int n)
+{
+  int k = n;
+  volatile long double x = 1;
+  volatile long double y = 2;
+  /* Invariant: 2^n == x * y^k.  */
+  if (k < 0)
+    {
+      y = 0.5L;
+      k = - k;
+    }
+  while (k > 0)
+    {
+      if (k != 2 * (k / 2))
+        {
+          x = x * y;
+          k = k - 1;
+        }
+      if (k == 0)
+        break;
+      y = y * y;
+      k = k / 2;
+    }
+  /* Now k == 0, hence x == 2^n.  */
+  return x;
+}
+
+/* ----------------------- Check macros for 'float' ----------------------- */
+
+/* Check that the FLT_* macros expand to constant expressions.  */
+int fb[] =
+  {
+    FLT_MANT_DIG, FLT_MIN_EXP, FLT_MAX_EXP,
+    FLT_DIG, FLT_MIN_10_EXP, FLT_MAX_10_EXP
+  };
+float fc[] = { FLT_EPSILON, FLT_MIN, FLT_MAX };
+
+static void
+test_float (void)
+{
+  /* Check that the value of FLT_MIN_EXP is well parenthesized.  */
+  ASSERT ((FLT_MIN_EXP % 101111) == (FLT_MIN_EXP) % 101111);
+
+  /* Check that the value of DBL_MIN_10_EXP is well parenthesized.  */
+  ASSERT ((FLT_MIN_10_EXP % 101111) == (FLT_MIN_10_EXP) % 101111);
+
+  /* Check that 'float' is as specified in IEEE 754.  */
+  ASSERT (FLT_MANT_DIG == 24);
+  ASSERT (FLT_MIN_EXP == -125);
+  ASSERT (FLT_MAX_EXP == 128);
+
+  /* Check the value of FLT_MIN_10_EXP.  */
+  ASSERT (FLT_MIN_10_EXP == - (int) (- (FLT_MIN_EXP - 1) * 0.30103));
+
+  /* Check the value of FLT_DIG.  */
+  ASSERT (FLT_DIG == (int) ((FLT_MANT_DIG - 1) * 0.30103));
+
+  /* Check the value of FLT_MIN_10_EXP.  */
+  ASSERT (FLT_MIN_10_EXP == - (int) (- (FLT_MIN_EXP - 1) * 0.30103));
+
+  /* Check the value of FLT_MAX_10_EXP.  */
+  ASSERT (FLT_MAX_10_EXP == (int) (FLT_MAX_EXP * 0.30103));
+
+  /* Check the value of FLT_MAX.  */
+  {
+    volatile float m = FLT_MAX;
+    int n;
+
+    ASSERT (m + m > m);
+    for (n = 0; n <= 2 * FLT_MANT_DIG; n++)
+      {
+        volatile float pow2_n = pow2f (n); /* 2^n */
+        volatile float x = m + (m / pow2_n);
+        if (x > m)
+          ASSERT (x + x == x);
+        else
+          ASSERT (!(x + x == x));
+      }
+  }
+
+  /* Check the value of FLT_MIN.  */
+  {
+    volatile float m = FLT_MIN;
+    volatile float x = pow2f (FLT_MIN_EXP - 1);
+    ASSERT (m == x);
+  }
+
+  /* Check the value of FLT_EPSILON.  */
+  {
+    volatile float e = FLT_EPSILON;
+    volatile float me;
+    int n;
+
+    me = 1.0f + e;
+    ASSERT (me > 1.0f);
+    ASSERT (me - 1.0f == e);
+    for (n = 0; n <= 2 * FLT_MANT_DIG; n++)
+      {
+        volatile float half_n = pow2f (- n); /* 2^-n */
+        volatile float x = me - half_n;
+        if (x < me)
+          ASSERT (x <= 1.0f);
+      }
+  }
+}
+
+/* ----------------------- Check macros for 'double' ----------------------- */
+
+/* Check that the DBL_* macros expand to constant expressions.  */
+int db[] =
+  {
+    DBL_MANT_DIG, DBL_MIN_EXP, DBL_MAX_EXP,
+    DBL_DIG, DBL_MIN_10_EXP, DBL_MAX_10_EXP
+  };
+double dc[] = { DBL_EPSILON, DBL_MIN, DBL_MAX };
+
+static void
+test_double (void)
+{
+  /* Check that the value of DBL_MIN_EXP is well parenthesized.  */
+  ASSERT ((DBL_MIN_EXP % 101111) == (DBL_MIN_EXP) % 101111);
+
+  /* Check that the value of DBL_MIN_10_EXP is well parenthesized.  */
+  ASSERT ((DBL_MIN_10_EXP % 101111) == (DBL_MIN_10_EXP) % 101111);
+
+  /* Check that 'double' is as specified in IEEE 754.  */
+  ASSERT (DBL_MANT_DIG == 53);
+  ASSERT (DBL_MIN_EXP == -1021);
+  ASSERT (DBL_MAX_EXP == 1024);
+
+  /* Check the value of DBL_MIN_10_EXP.  */
+  ASSERT (DBL_MIN_10_EXP == - (int) (- (DBL_MIN_EXP - 1) * 0.30103));
+
+  /* Check the value of DBL_DIG.  */
+  ASSERT (DBL_DIG == (int) ((DBL_MANT_DIG - 1) * 0.30103));
+
+  /* Check the value of DBL_MIN_10_EXP.  */
+  ASSERT (DBL_MIN_10_EXP == - (int) (- (DBL_MIN_EXP - 1) * 0.30103));
+
+  /* Check the value of DBL_MAX_10_EXP.  */
+  ASSERT (DBL_MAX_10_EXP == (int) (DBL_MAX_EXP * 0.30103));
+
+  /* Check the value of DBL_MAX.  */
+  {
+    volatile double m = DBL_MAX;
+    int n;
+
+    ASSERT (m + m > m);
+    for (n = 0; n <= 2 * DBL_MANT_DIG; n++)
+      {
+        volatile double pow2_n = pow2d (n); /* 2^n */
+        volatile double x = m + (m / pow2_n);
+        if (x > m)
+          ASSERT (x + x == x);
+        else
+          ASSERT (!(x + x == x));
+      }
+  }
+
+  /* Check the value of DBL_MIN.  */
+  {
+    volatile double m = DBL_MIN;
+    volatile double x = pow2d (DBL_MIN_EXP - 1);
+    ASSERT (m == x);
+  }
+
+  /* Check the value of DBL_EPSILON.  */
+  {
+    volatile double e = DBL_EPSILON;
+    volatile double me;
+    int n;
+
+    me = 1.0 + e;
+    ASSERT (me > 1.0);
+    ASSERT (me - 1.0 == e);
+    for (n = 0; n <= 2 * DBL_MANT_DIG; n++)
+      {
+        volatile double half_n = pow2d (- n); /* 2^-n */
+        volatile double x = me - half_n;
+        if (x < me)
+          ASSERT (x <= 1.0);
+      }
+  }
+}
+
+/* -------------------- Check macros for 'long double' -------------------- */
+
+/* Check that the LDBL_* macros expand to constant expressions.  */
+int lb[] =
+  {
+    LDBL_MANT_DIG, LDBL_MIN_EXP, LDBL_MAX_EXP,
+    LDBL_DIG, LDBL_MIN_10_EXP, LDBL_MAX_10_EXP
+  };
+long double lc1 = LDBL_EPSILON;
+long double lc2 = LDBL_MIN;
+#if 0 /* LDBL_MAX is not a constant expression on some platforms.  */
+long double lc3 = LDBL_MAX;
+#endif
+
+static void
+test_long_double (void)
+{
+  /* Check that the value of LDBL_MIN_EXP is well parenthesized.  */
+  ASSERT ((LDBL_MIN_EXP % 101111) == (LDBL_MIN_EXP) % 101111);
+
+  /* Check that the value of LDBL_MIN_10_EXP is well parenthesized.  */
+  ASSERT ((LDBL_MIN_10_EXP % 101111) == (LDBL_MIN_10_EXP) % 101111);
+
+  /* Check that 'long double' is at least as wide as 'double'.  */
+  ASSERT (LDBL_MANT_DIG >= DBL_MANT_DIG);
+  ASSERT (LDBL_MIN_EXP - LDBL_MANT_DIG <= DBL_MIN_EXP - DBL_MANT_DIG);
+  ASSERT (LDBL_MAX_EXP >= DBL_MAX_EXP);
+
+  /* Check the value of LDBL_DIG.  */
+  ASSERT (LDBL_DIG == (int)((LDBL_MANT_DIG - 1) * 0.30103));
+
+  /* Check the value of LDBL_MIN_10_EXP.  */
+  ASSERT (LDBL_MIN_10_EXP == - (int) (- (LDBL_MIN_EXP - 1) * 0.30103));
+
+  /* Check the value of LDBL_MAX_10_EXP.  */
+  ASSERT (LDBL_MAX_10_EXP == (int) (LDBL_MAX_EXP * 0.30103));
+
+  /* Check the value of LDBL_MAX.  */
+  {
+    volatile long double m = LDBL_MAX;
+    int n;
+
+    ASSERT (m + m > m);
+    for (n = 0; n <= 2 * LDBL_MANT_DIG; n++)
+      {
+        volatile long double pow2_n = pow2l (n); /* 2^n */
+        volatile long double x = m + (m / pow2_n);
+        if (x > m)
+          ASSERT (x + x == x);
+        else
+          ASSERT (!(x + x == x));
+      }
+  }
+
+  /* Check the value of LDBL_MIN.  */
+  {
+    volatile long double m = LDBL_MIN;
+    volatile long double x = pow2l (LDBL_MIN_EXP - 1);
+    ASSERT (m == x);
+  }
+
+  /* Check the value of LDBL_EPSILON.  */
+  {
+    volatile long double e = LDBL_EPSILON;
+    volatile long double me;
+    int n;
+
+    me = 1.0L + e;
+    ASSERT (me > 1.0L);
+    ASSERT (me - 1.0L == e);
+    for (n = 0; n <= 2 * LDBL_MANT_DIG; n++)
+      {
+        volatile long double half_n = pow2l (- n); /* 2^-n */
+        volatile long double x = me - half_n;
+        if (x < me)
+          ASSERT (x <= 1.0L);
+      }
+  }
+}
+
+int
+main ()
+{
+  test_float ();
+  test_double ();
+
+  {
+    DECL_LONG_DOUBLE_ROUNDING
+
+    BEGIN_LONG_DOUBLE_ROUNDING ();
+
+    test_long_double ();
+
+    END_LONG_DOUBLE_ROUNDING ();
+  }
+
+  return 0;
+}
+
+#else
+
+int
+main ()
+{
+  fprintf (stderr, "Skipping test: FLT_RADIX is not 2.\n");
+  return 77;
+}
+
+#endif
diff --git a/src/grep/gnulib-tests/test-fnmatch-h.c b/src/grep/gnulib-tests/test-fnmatch-h.c
new file mode 100644
index 0000000..86246fd
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fnmatch-h.c
@@ -0,0 +1,31 @@
+/* Test of <fnmatch.h> substitute.
+   Copyright (C) 2018-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2018.  */
+
+#include <config.h>
+
+#include <fnmatch.h>
+
+/* Check that the various FNM_* macros are defined.  */
+int ret = FNM_NOMATCH;
+int options[] = { FNM_PATHNAME, FNM_PERIOD, FNM_NOESCAPE };
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-fnmatch.c b/src/grep/gnulib-tests/test-fnmatch.c
new file mode 100644
index 0000000..ae7fc8a
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fnmatch.c
@@ -0,0 +1,66 @@
+/* Test of fnmatch string matching function.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Simon Josefsson <simon@josefsson.org>, 2009.  */
+
+#include <config.h>
+
+#include <fnmatch.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fnmatch, int, (char const *, char const *, int));
+
+#include "macros.h"
+
+int
+main ()
+{
+  int res;
+
+  ASSERT (res = fnmatch ("", "", 0) == 0);
+
+  ASSERT (res = fnmatch ("*", "", 0) == 0);
+  ASSERT (res = fnmatch ("*", "foo", 0) == 0);
+  ASSERT (res = fnmatch ("*", "bar", 0) == 0);
+  ASSERT (res = fnmatch ("*", "*", 0) == 0);
+  ASSERT (res = fnmatch ("**", "f", 0) == 0);
+  ASSERT (res = fnmatch ("**", "foo.txt", 0) == 0);
+  ASSERT (res = fnmatch ("*.*", "foo.txt", 0) == 0);
+
+  ASSERT (res = fnmatch ("foo*.txt", "foobar.txt", 0) == 0);
+
+  ASSERT (res = fnmatch ("foo.txt", "foo.txt", 0) == 0);
+  ASSERT (res = fnmatch ("foo\\.txt", "foo.txt", 0) == 0);
+  ASSERT (res = fnmatch ("foo\\.txt", "foo.txt", FNM_NOESCAPE) == FNM_NOMATCH);
+
+  /* Verify that an unmatched [ is treated as a literal, as POSIX
+     requires.  This test ensures that glibc Bugzilla bug #12378 stays
+     fixed.
+   */
+  ASSERT (res = fnmatch ("[/b", "[/b", 0) == 0);
+
+  ASSERT (fnmatch ("[[:alpha:]'[:alpha:]\0]", "a", 0) == FNM_NOMATCH);
+  ASSERT (fnmatch ("[a[.\0.]]", "a", 0) == FNM_NOMATCH);
+#ifdef FNM_EXTMATCH
+  ASSERT (fnmatch ("**(!()", "**(!()", FNM_EXTMATCH) == 0);
+#endif
+#ifdef FNM_LEADING_DIR
+  ASSERT (fnmatch ("x?y", "x/y/z", FNM_PATHNAME | FNM_LEADING_DIR)
+          == FNM_NOMATCH);
+#endif
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-fopen-gnu.c b/src/grep/gnulib-tests/test-fopen-gnu.c
new file mode 100644
index 0000000..26c5762
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fopen-gnu.c
@@ -0,0 +1,88 @@
+/* Test of opening a file stream.
+   Copyright (C) 2020-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2020.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdio.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#define BASE "test-fopen-gnu.t"
+
+/* 0x1a is an EOF on Windows.  */
+#define DATA "abc\x1axyz"
+
+int
+main (void)
+{
+  FILE *f;
+  int fd;
+  int flags;
+  char buf[16];
+
+  /* Remove anything from prior partial run.  */
+  unlink (BASE "file");
+  unlink (BASE "binary");
+
+  /* Create the file.  */
+  f = fopen (BASE "file", "w");
+  ASSERT (f);
+  fd = fileno (f);
+  ASSERT (fd >= 0);
+  flags = fcntl (fd, F_GETFD);
+  ASSERT (flags >= 0);
+  ASSERT ((flags & FD_CLOEXEC) == 0);
+  ASSERT (fclose (f) == 0);
+
+  /* Create the file and check the 'e' mode.  */
+  f = fopen (BASE "file", "we");
+  ASSERT (f);
+  fd = fileno (f);
+  ASSERT (fd >= 0);
+  flags = fcntl (fd, F_GETFD);
+  ASSERT (flags >= 0);
+  ASSERT ((flags & FD_CLOEXEC) != 0);
+  ASSERT (fclose (f) == 0);
+
+  /* Open the file and check the 'x' mode.  */
+  f = fopen (BASE "file", "ax");
+  ASSERT (f == NULL);
+  ASSERT (errno == EEXIST);
+
+  /* Open a binary file and check that the 'e' mode doesn't interfere.  */
+  f = fopen (BASE "binary", "wbe");
+  ASSERT (f);
+  ASSERT (fwrite (DATA, 1, sizeof (DATA)-1, f) == sizeof (DATA)-1);
+  ASSERT (fclose (f) == 0);
+
+  f = fopen (BASE "binary", "rbe");
+  ASSERT (f);
+  ASSERT (fread (buf, 1, sizeof (buf), f) == sizeof (DATA)-1);
+  ASSERT (fclose (f) == 0);
+
+  /* Cleanup.  */
+  ASSERT (unlink (BASE "file") == 0);
+  ASSERT (unlink (BASE "binary") == 0);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-fopen.c b/src/grep/gnulib-tests/test-fopen.c
new file mode 100644
index 0000000..f69a13a
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fopen.c
@@ -0,0 +1,34 @@
+/* Test of opening a file stream.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fopen, FILE *, (char const *, char const *));
+
+#define BASE "test-fopen.t"
+
+#include "test-fopen.h"
+
+int
+main (void)
+{
+  return test_fopen ();
+}
diff --git a/src/grep/gnulib-tests/test-fopen.h b/src/grep/gnulib-tests/test-fopen.h
new file mode 100644
index 0000000..b6a3dcb
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fopen.h
@@ -0,0 +1,89 @@
+/* Test of opening a file stream.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+/* Include <config.h> and a form of <stdio.h> first.  */
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+/* Test fopen.  Assumes BASE is defined.  */
+
+static int
+test_fopen (void)
+{
+  FILE *f;
+  /* Remove anything from prior partial run.  */
+  unlink (BASE "file");
+
+  /* Read requires existing file.  */
+  errno = 0;
+  ASSERT (fopen (BASE "file", "r") == NULL);
+  ASSERT (errno == ENOENT);
+
+  /* Write can create a file.  */
+  f = fopen (BASE "file", "w");
+  ASSERT (f);
+  ASSERT (fclose (f) == 0);
+
+  /* Trailing slash is invalid on non-directory.  */
+  errno = 0;
+  ASSERT (fopen (BASE "file/", "r") == NULL);
+  ASSERT (errno == ENOTDIR || errno == EISDIR || errno == EINVAL);
+
+  errno = 0;
+  ASSERT (fopen (BASE "file/", "r+") == NULL);
+  ASSERT (errno == ENOTDIR || errno == EISDIR || errno == EINVAL);
+
+  /* Cannot create a directory.  */
+  errno = 0;
+  ASSERT (fopen ("nonexist.ent/", "w") == NULL);
+  ASSERT (errno == ENOTDIR || errno == EISDIR || errno == ENOENT
+          || errno == EINVAL);
+
+  /* Directories cannot be opened for writing.  */
+  errno = 0;
+  ASSERT (fopen (".", "w") == NULL);
+  ASSERT (errno == EISDIR || errno == EINVAL || errno == EACCES);
+
+  errno = 0;
+  ASSERT (fopen ("./", "w") == NULL);
+  ASSERT (errno == EISDIR || errno == EINVAL || errno == EACCES);
+
+  errno = 0;
+  ASSERT (fopen (".", "r+") == NULL);
+  ASSERT (errno == EISDIR || errno == EINVAL || errno == EACCES);
+
+  errno = 0;
+  ASSERT (fopen ("./", "r+") == NULL);
+  ASSERT (errno == EISDIR || errno == EINVAL || errno == EACCES);
+
+  /* /dev/null must exist, and be writable.  */
+  f = fopen ("/dev/null", "r");
+  ASSERT (f);
+  ASSERT (fclose (f) == 0);
+  f = fopen ("/dev/null", "w");
+  ASSERT (f);
+  ASSERT (fclose (f) == 0);
+
+  /* Cleanup.  */
+  ASSERT (unlink (BASE "file") == 0);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-fpending.c b/src/grep/gnulib-tests/test-fpending.c
new file mode 100644
index 0000000..bf79f71
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fpending.c
@@ -0,0 +1,41 @@
+/* Ensure that __fpending works.
+
+   Copyright (C) 2004, 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+   Written by Jim Meyering.  */
+
+#include <config.h>
+
+#include "fpending.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  ASSERT (__fpending (stdout) == 0);
+
+  fputs ("foo", stdout);
+  ASSERT (__fpending (stdout) == 3);
+
+  fflush (stdout);
+  ASSERT (__fpending (stdout) == 0);
+
+  exit (0);
+}
diff --git a/src/grep/gnulib-tests/test-fpending.sh b/src/grep/gnulib-tests/test-fpending.sh
new file mode 100755
index 0000000..abe7d83
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fpending.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+tmpfile=
+trap 'rm -fr $tmpfile' 1 2 3 15
+
+tmpfile=test-fpending.t
+
+${CHECKER} ./test-fpending${EXEEXT} > $tmpfile || exit 1
+
+rm -fr $tmpfile
+
+exit 0
diff --git a/src/grep/gnulib-tests/test-fputc.c b/src/grep/gnulib-tests/test-fputc.c
new file mode 100644
index 0000000..47bb844
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fputc.c
@@ -0,0 +1,93 @@
+/* Test of fputc() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fputc, int, (int, FILE *));
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+# include "msvc-inval.h"
+#endif
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  const char *filename = "test-fputc.txt";
+
+  /* We don't have an fputc() function that installs an invalid parameter
+     handler so far.  So install that handler here, explicitly.  */
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
+    && MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
+  gl_msvc_inval_ensure_handler ();
+#endif
+
+  /* Test that fputc() on an unbuffered stream sets errno if someone else
+     closes the stream fd behind the back of stdio.  */
+  {
+    FILE *fp = fopen (filename, "w");
+    ASSERT (fp != NULL);
+    setvbuf (fp, NULL, _IONBF, 0);
+    ASSERT (close (fileno (fp)) == 0);
+    errno = 0;
+    ASSERT (fputc ('x', fp) == EOF);
+    ASSERT (errno == EBADF);
+    ASSERT (ferror (fp));
+    fclose (fp);
+  }
+
+  /* Test that fputc() on an unbuffered stream sets errno if the stream
+     was constructed with an invalid file descriptor.  */
+  {
+    FILE *fp = fdopen (-1, "w");
+    if (fp != NULL)
+      {
+        setvbuf (fp, NULL, _IONBF, 0);
+        errno = 0;
+        ASSERT (fputc ('x', fp) == EOF);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+  {
+    FILE *fp;
+    close (99);
+    fp = fdopen (99, "w");
+    if (fp != NULL)
+      {
+        setvbuf (fp, NULL, _IONBF, 0);
+        errno = 0;
+        ASSERT (fputc ('x', fp) == EOF);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+
+  /* Clean up.  */
+  unlink (filename);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-fread.c b/src/grep/gnulib-tests/test-fread.c
new file mode 100644
index 0000000..f8214ca
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fread.c
@@ -0,0 +1,102 @@
+/* Test of fread() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fread, size_t, (void *, size_t, size_t, FILE *));
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+# include "msvc-inval.h"
+#endif
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  const char *filename = "test-fread.txt";
+
+  /* We don't have an fread() function that installs an invalid parameter
+     handler so far.  So install that handler here, explicitly.  */
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
+    && MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
+  gl_msvc_inval_ensure_handler ();
+#endif
+
+  /* Prepare a file.  */
+  {
+    const char text[] = "hello world";
+    int fd = open (filename, O_RDWR | O_CREAT | O_TRUNC, 0600);
+    ASSERT (fd >= 0);
+    ASSERT (write (fd, text, sizeof (text)) == sizeof (text));
+    ASSERT (close (fd) == 0);
+  }
+
+  /* Test that fread() sets errno if someone else closes the stream
+     fd behind the back of stdio.  */
+  {
+    FILE *fp = fopen (filename, "r");
+    char buf[5];
+    ASSERT (fp != NULL);
+    ASSERT (close (fileno (fp)) == 0);
+    errno = 0;
+    ASSERT (fread (buf, 1, sizeof (buf), fp) == 0);
+    ASSERT (errno == EBADF);
+    ASSERT (ferror (fp));
+    fclose (fp);
+  }
+
+  /* Test that fread() sets errno if the stream was constructed with
+     an invalid file descriptor.  */
+  {
+    FILE *fp = fdopen (-1, "r");
+    if (fp != NULL)
+      {
+        char buf[1];
+        errno = 0;
+        ASSERT (fread (buf, 1, 1, fp) == 0);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+  {
+    FILE *fp;
+    close (99);
+    fp = fdopen (99, "r");
+    if (fp != NULL)
+      {
+        char buf[1];
+        errno = 0;
+        ASSERT (fread (buf, 1, 1, fp) == 0);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+
+  /* Clean up.  */
+  unlink (filename);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-free.c b/src/grep/gnulib-tests/test-free.c
new file mode 100644
index 0000000..53f1085
--- /dev/null
+++ b/src/grep/gnulib-tests/test-free.c
@@ -0,0 +1,175 @@
+/* Test of free() function.
+   Copyright (C) 2020-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2020.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#if defined __linux__
+# include <fcntl.h>
+# include <stdint.h>
+# include <string.h>
+# include <sys/mman.h>
+#endif
+
+#include "macros.h"
+
+/* The indirection through a volatile function pointer is necessary to prevent
+   a GCC optimization.  Without it, when optimizing, GCC would "know" that errno
+   is unchanged by calling free(ptr), when ptr was the result of a malloc(...)
+   call in the same function.  */
+static int
+get_errno (void)
+{
+  volatile int err = errno;
+  return err;
+}
+
+static int (* volatile get_errno_func) (void) = get_errno;
+
+int
+main ()
+{
+  /* Check that free() preserves errno.  */
+  {
+    errno = 1789; /* Liberté, égalité, fraternité.  */
+    free (NULL);
+    ASSERT_NO_STDIO (get_errno_func () == 1789);
+  }
+  { /* Small memory allocations.  */
+    #define N 10000
+    void * volatile ptrs[N];
+    size_t i;
+    for (i = 0; i < N; i++)
+      ptrs[i] = malloc (15);
+    for (i = 0; i < N; i++)
+      {
+        errno = 1789;
+        free (ptrs[i]);
+        ASSERT_NO_STDIO (get_errno_func () == 1789);
+      }
+    #undef N
+  }
+  { /* Medium memory allocations.  */
+    #define N 1000
+    void * volatile ptrs[N];
+    size_t i;
+    for (i = 0; i < N; i++)
+      ptrs[i] = malloc (729);
+    for (i = 0; i < N; i++)
+      {
+        errno = 1789;
+        free (ptrs[i]);
+        ASSERT_NO_STDIO (get_errno_func () == 1789);
+      }
+    #undef N
+  }
+  { /* Large memory allocations.  */
+    #define N 10
+    void * volatile ptrs[N];
+    size_t i;
+    for (i = 0; i < N; i++)
+      ptrs[i] = malloc (5318153);
+    for (i = 0; i < N; i++)
+      {
+        errno = 1789;
+        free (ptrs[i]);
+        ASSERT_NO_STDIO (get_errno_func () == 1789);
+      }
+    #undef N
+  }
+
+  /* Test a less common code path.
+     When malloc() is based on mmap(), free() can sometimes call munmap().
+     munmap() usually succeeds, but fails in a particular situation: when
+       - it has to unmap the middle part of a VMA, and
+       - the number of VMAs of a process is limited and the limit is
+         already reached.
+     The latter condition is fulfilled on Linux, when the file
+     /proc/sys/vm/max_map_count exists.  This file contains the limit
+       - for Linux >= 2.4.19: 65536 (DEFAULT_MAX_MAP_COUNT in linux/include/linux/sched.h)
+       - for Linux >= 2.6.31: 65530 (DEFAULT_MAX_MAP_COUNT in linux/include/linux/mm.h).
+     But do not test it with glibc < 2.15, since that triggers a glibc internal
+     abort: "malloc.c:3551: munmap_chunk: Assertion `ret == 0' failed."
+   */
+  #if defined __linux__ && !(__GLIBC__ == 2 && __GLIBC_MINOR__ < 15)
+  if (open ("/proc/sys/vm/max_map_count", O_RDONLY) >= 0)
+    {
+      /* Preparations.  */
+      size_t pagesize = getpagesize ();
+      void *firstpage_backup = malloc (pagesize);
+      void *lastpage_backup = malloc (pagesize);
+      /* Allocate a large memory area, as a bumper, so that the MAP_FIXED
+         allocation later will not overwrite parts of the memory areas
+         allocated to ld.so or libc.so.  */
+      void *bumper_region =
+        mmap (NULL, 0x1000000, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+      /* A file descriptor pointing to a regular file.  */
+      int fd = open ("test-free", O_RDONLY);
+
+      if (firstpage_backup != NULL && lastpage_backup != NULL
+          && bumper_region != (void *)(-1)
+          && fd >= 0)
+        {
+          /* Do a large memory allocation.  */
+          size_t big_size = 0x1000000;
+          void * volatile ptr = malloc (big_size - 0x100);
+          char *ptr_aligned = (char *) ((uintptr_t) ptr & ~(pagesize - 1));
+          /* This large memory allocation allocated a memory area
+             from ptr_aligned to ptr_aligned + big_size.
+             Enlarge this memory area by adding a page before and a page
+             after it.  */
+          memcpy (firstpage_backup, ptr_aligned, pagesize);
+          memcpy (lastpage_backup, ptr_aligned + big_size - pagesize, pagesize);
+          if (mmap (ptr_aligned - pagesize, pagesize + big_size + pagesize,
+                    PROT_READ | PROT_WRITE,
+                    MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0)
+              != (void *)(-1))
+            {
+              memcpy (ptr_aligned, firstpage_backup, pagesize);
+              memcpy (ptr_aligned + big_size - pagesize, lastpage_backup, pagesize);
+
+              /* Now add as many mappings as we can.
+                 Stop at 65536, in order not to crash the machine (in case the
+                 limit has been increased by the system administrator).  */
+              size_t i;
+              for (i = 0; i < 65536; i++)
+                if (mmap (NULL, pagesize, PROT_READ, MAP_FILE | MAP_PRIVATE, fd, 0)
+                    == (void *)(-1))
+                  break;
+              /* Now the number of VMAs of this process has hopefully attained
+                 its limit.  */
+
+              errno = 1789;
+              /* This call to free() is supposed to call
+                   munmap (ptr_aligned, big_size);
+                 which increases the number of VMAs by 1, which is supposed
+                 to fail.  */
+              free (ptr);
+              ASSERT_NO_STDIO (get_errno_func () == 1789);
+            }
+        }
+    }
+  #endif
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-fstat.c b/src/grep/gnulib-tests/test-fstat.c
new file mode 100644
index 0000000..0d78e17
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fstat.c
@@ -0,0 +1,50 @@
+/* Tests of fstat() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/stat.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fstat, int, (int, struct stat *));
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    struct stat statbuf;
+
+    errno = 0;
+    ASSERT (fstat (-1, &statbuf) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    struct stat statbuf;
+
+    close (99);
+    errno = 0;
+    ASSERT (fstat (99, &statbuf) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-fstatat.c b/src/grep/gnulib-tests/test-fstatat.c
new file mode 100644
index 0000000..3c8ce74
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fstatat.c
@@ -0,0 +1,108 @@
+/* Tests of fstatat.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <sys/stat.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fstatat, int, (int, char const *, struct stat *, int));
+
+#include <fcntl.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "openat.h"
+#include "same-inode.h"
+#include "ignore-value.h"
+#include "macros.h"
+
+#ifndef BASE
+# define BASE "test-fstatat.t"
+#endif
+
+#include "test-lstat.h"
+#include "test-stat.h"
+
+static int dfd = AT_FDCWD;
+
+/* Wrapper around fstatat to test stat behavior.  */
+static int
+do_stat (char const *name, struct stat *st)
+{
+#ifdef TEST_STATAT
+  return statat (dfd, name, st);
+#else
+  return fstatat (dfd, name, st, 0);
+#endif
+}
+
+/* Wrapper around fstatat to test lstat behavior.  */
+static int
+do_lstat (char const *name, struct stat *st)
+{
+#ifdef TEST_STATAT
+  return lstatat (dfd, name, st);
+#else
+  return fstatat (dfd, name, st, AT_SYMLINK_NOFOLLOW);
+#endif
+}
+
+int
+main (int argc _GL_UNUSED, char *argv[])
+{
+  int result;
+
+  /* Remove any leftovers from a previous partial run.  */
+  ignore_value (system ("rm -rf " BASE "*"));
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    struct stat statbuf;
+
+    errno = 0;
+    ASSERT (fstatat (-1, "foo", &statbuf, 0) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    struct stat statbuf;
+
+    close (99);
+    errno = 0;
+    ASSERT (fstatat (99, "foo", &statbuf, 0) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  result = test_stat_func (do_stat, false);
+  ASSERT (test_lstat_func (do_lstat, false) == result);
+  dfd = open (".", O_RDONLY);
+  ASSERT (0 <= dfd);
+  ASSERT (test_stat_func (do_stat, false) == result);
+  ASSERT (test_lstat_func (do_lstat, false) == result);
+  ASSERT (close (dfd) == 0);
+
+  /* FIXME - add additional tests of dfd not at current directory.  */
+
+  if (result == 77)
+    fputs ("skipping test: symlinks not supported on this file system\n",
+           stderr);
+  return result;
+}
diff --git a/src/grep/gnulib-tests/test-ftruncate.c b/src/grep/gnulib-tests/test-ftruncate.c
new file mode 100644
index 0000000..d11b8eb
--- /dev/null
+++ b/src/grep/gnulib-tests/test-ftruncate.c
@@ -0,0 +1,60 @@
+/* Test truncating a file.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (ftruncate, int, (int, off_t));
+
+#include <errno.h>
+#include <fcntl.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  const char *filename = argv[1];
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    errno = 0;
+    ASSERT (ftruncate (-1, 0) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    close (99);
+    errno = 0;
+    ASSERT (ftruncate (99, 0) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  /* Test behaviour for read-only file descriptors.  */
+  {
+    int fd = open (filename, O_RDONLY);
+    ASSERT (fd >= 0);
+    errno = 0;
+    ASSERT (ftruncate (fd, 0) == -1);
+    ASSERT (errno == EBADF || errno == EINVAL
+            || errno == EACCES /* seen on mingw */
+           );
+    close (fd);
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-ftruncate.sh b/src/grep/gnulib-tests/test-ftruncate.sh
new file mode 100755
index 0000000..203e07b
--- /dev/null
+++ b/src/grep/gnulib-tests/test-ftruncate.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+exec ${CHECKER} ./test-ftruncate${EXEEXT} "$srcdir/test-ftruncate.sh"
diff --git a/src/grep/gnulib-tests/test-fwrite.c b/src/grep/gnulib-tests/test-fwrite.c
new file mode 100644
index 0000000..17e80bd
--- /dev/null
+++ b/src/grep/gnulib-tests/test-fwrite.c
@@ -0,0 +1,96 @@
+/* Test of fwrite() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fwrite, size_t, (const void *, size_t, size_t, FILE *));
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+# include "msvc-inval.h"
+#endif
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  const char *filename = "test-fwrite.txt";
+
+  /* We don't have an fwrite() function that installs an invalid parameter
+     handler so far.  So install that handler here, explicitly.  */
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
+    && MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
+  gl_msvc_inval_ensure_handler ();
+#endif
+
+  /* Test that fwrite() on an unbuffered stream sets errno if someone else
+     closes the stream fd behind the back of stdio.  */
+  {
+    FILE *fp = fopen (filename, "w");
+    char buf[5] = "world";
+    ASSERT (fp != NULL);
+    setvbuf (fp, NULL, _IONBF, 0);
+    ASSERT (close (fileno (fp)) == 0);
+    errno = 0;
+    ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0);
+    ASSERT (errno == EBADF);
+    ASSERT (ferror (fp));
+    fclose (fp);
+  }
+
+  /* Test that fwrite() on an unbuffered stream sets errno if the stream
+     was constructed with an invalid file descriptor.  */
+  {
+    FILE *fp = fdopen (-1, "w");
+    if (fp != NULL)
+      {
+        char buf[5] = "world";
+        setvbuf (fp, NULL, _IONBF, 0);
+        errno = 0;
+        ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+  {
+    FILE *fp;
+    close (99);
+    fp = fdopen (99, "w");
+    if (fp != NULL)
+      {
+        char buf[5] = "world";
+        setvbuf (fp, NULL, _IONBF, 0);
+        errno = 0;
+        ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+
+  /* Clean up.  */
+  unlink (filename);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-getcwd-lgpl.c b/src/grep/gnulib-tests/test-getcwd-lgpl.c
new file mode 100644
index 0000000..17080d9
--- /dev/null
+++ b/src/grep/gnulib-tests/test-getcwd-lgpl.c
@@ -0,0 +1,102 @@
+/* Test of getcwd() function.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (getcwd, char *, (char *, size_t));
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  char *pwd1;
+  char *pwd2;
+  /* If the user provides an argument, attempt to chdir there first.  */
+  if (1 < argc)
+    {
+      if (chdir (argv[1]) == 0)
+        printf ("changed to directory %s\n", argv[1]);
+    }
+
+  pwd1 = getcwd (NULL, 0);
+  ASSERT (pwd1 && *pwd1);
+  if (1 < argc)
+    printf ("cwd=%s\n", pwd1);
+
+  /* Make sure the result is usable.  */
+  ASSERT (chdir (pwd1) == 0);
+  ASSERT (chdir (".//./.") == 0);
+
+  /* Make sure that result is normalized.  */
+  pwd2 = getcwd (NULL, 0);
+  ASSERT (pwd2);
+  ASSERT (strcmp (pwd1, pwd2) == 0);
+  free (pwd2);
+  {
+    size_t len = strlen (pwd1);
+    ssize_t i = len - 10;
+    if (i < 1)
+      i = 1;
+    pwd2 = getcwd (NULL, len + 1);
+    ASSERT (pwd2);
+    free (pwd2);
+    pwd2 = malloc (len + 2);
+    for ( ; i <= len; i++)
+      {
+        char *tmp;
+        errno = 0;
+        ASSERT (getcwd (pwd2, i) == NULL);
+        ASSERT (errno == ERANGE);
+        /* Allow either glibc or BSD behavior, since POSIX allows both.  */
+        errno = 0;
+        tmp = getcwd (NULL, i);
+        if (tmp)
+          {
+            ASSERT (strcmp (pwd1, tmp) == 0);
+            free (tmp);
+          }
+        else
+          {
+            ASSERT (errno == ERANGE);
+          }
+      }
+    ASSERT (getcwd (pwd2, len + 1) == pwd2);
+    pwd2[len] = '/';
+    pwd2[len + 1] = '\0';
+  }
+  ASSERT (strstr (pwd2, "/./") == NULL);
+  ASSERT (strstr (pwd2, "/../") == NULL);
+  ASSERT (strstr (pwd2 + 1 + (pwd2[1] == '/'), "//") == NULL);
+
+  /* Validate a POSIX requirement on size.  */
+  errno = 0;
+  ASSERT (getcwd(pwd2, 0) == NULL);
+  ASSERT (errno == EINVAL);
+
+  free (pwd1);
+  free (pwd2);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-getdtablesize.c b/src/grep/gnulib-tests/test-getdtablesize.c
new file mode 100644
index 0000000..d56c682
--- /dev/null
+++ b/src/grep/gnulib-tests/test-getdtablesize.c
@@ -0,0 +1,36 @@
+/* Test of getdtablesize() function.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (getdtablesize, int, (void));
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  ASSERT (getdtablesize () >= 3);
+  ASSERT (dup2 (0, getdtablesize() - 1) == getdtablesize () - 1);
+  ASSERT (dup2 (0, getdtablesize()) == -1);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-getopt-gnu.c b/src/grep/gnulib-tests/test-getopt-gnu.c
new file mode 100644
index 0000000..fe1ab3c
--- /dev/null
+++ b/src/grep/gnulib-tests/test-getopt-gnu.c
@@ -0,0 +1,45 @@
+/* Test of command line argument processing.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+#include <config.h>
+
+/* None of the files accessed by this test are large, so disable the
+   ftell link warning if we are not using the gnulib ftell module.  */
+#define _GL_NO_LARGE_FILES
+
+/* POSIX and glibc provide the getopt() function in <unistd.h>, see
+   https://pubs.opengroup.org/onlinepubs/9699919799/functions/getopt.html
+   https://www.gnu.org/software/libc/manual/html_node/Using-Getopt.html
+   But gnulib provides the getopt() function in <getopt.h>, not in <unistd.h>.
+   This is what we are testing here.  */
+#include <getopt.h>
+
+#ifndef __getopt_argv_const
+# define __getopt_argv_const const
+#endif
+#include "signature.h"
+SIGNATURE_CHECK (getopt_long, int, (int, char *__getopt_argv_const *,
+                                    char const *, struct option const *,
+                                    int *));
+SIGNATURE_CHECK (getopt_long_only, int, (int, char *__getopt_argv_const *,
+                                         char const *, struct option const *,
+                                         int *));
+
+#define TEST_GETOPT_GNU 1
+#define TEST_GETOPT_TMP_NAME "test-getopt-gnu.tmp"
+#include "test-getopt-main.h"
diff --git a/src/grep/gnulib-tests/test-getopt-main.h b/src/grep/gnulib-tests/test-getopt-main.h
new file mode 100644
index 0000000..c86dc8d
--- /dev/null
+++ b/src/grep/gnulib-tests/test-getopt-main.h
@@ -0,0 +1,76 @@
+/* Test of command line argument processing.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+#include "signature.h"
+SIGNATURE_CHECK (getopt, int, (int, char * const[], char const *));
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+/* This test intentionally remaps stderr.  So, we arrange to have fd 10
+   (outside the range of interesting fd's during the test) set up to
+   duplicate the original stderr.  */
+
+#define BACKUP_STDERR_FILENO 10
+#define ASSERT_STREAM myerr
+#include "macros.h"
+
+static FILE *myerr;
+
+#include "test-getopt.h"
+#if TEST_GETOPT_GNU
+# include "test-getopt_long.h"
+#endif
+
+int
+main (void)
+{
+   /* This test validates that stderr is used correctly, so move the
+      original into fd 10.  */
+  if (dup2 (STDERR_FILENO, BACKUP_STDERR_FILENO) != BACKUP_STDERR_FILENO
+      || (myerr = fdopen (BACKUP_STDERR_FILENO, "w")) == NULL)
+    return 2;
+
+  ASSERT (freopen (TEST_GETOPT_TMP_NAME, "w", stderr) == stderr);
+
+  /* These default values are required by POSIX.  */
+  ASSERT (optind == 1);
+  ASSERT (opterr != 0);
+
+  setenv ("POSIXLY_CORRECT", "1", 1);
+  test_getopt ();
+
+#if TEST_GETOPT_GNU
+  test_getopt_long_posix ();
+#endif
+
+  unsetenv ("POSIXLY_CORRECT");
+  test_getopt ();
+
+#if TEST_GETOPT_GNU
+  test_getopt_long ();
+  test_getopt_long_only ();
+#endif
+
+  ASSERT (fclose (stderr) == 0);
+  ASSERT (remove (TEST_GETOPT_TMP_NAME) == 0);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-getopt-posix.c b/src/grep/gnulib-tests/test-getopt-posix.c
new file mode 100644
index 0000000..26d5764
--- /dev/null
+++ b/src/grep/gnulib-tests/test-getopt-posix.c
@@ -0,0 +1,34 @@
+/* Test of command line argument processing.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+#include <config.h>
+
+/* None of the files accessed by this test are large, so disable the
+   ftell link warning if we are not using the gnulib ftell module.  */
+#define _GL_NO_LARGE_FILES
+
+/* POSIX and glibc provide the getopt() function in <unistd.h>, see
+   https://pubs.opengroup.org/onlinepubs/9699919799/functions/getopt.html
+   https://www.gnu.org/software/libc/manual/html_node/Using-Getopt.html
+   But gnulib provides the getopt() function in <getopt.h>, not in <unistd.h>.
+   Nevertheless the getopt() function should also be found in <unistd.h>.  */
+#include <unistd.h>
+
+#define TEST_GETOPT_GNU 0
+#define TEST_GETOPT_TMP_NAME "test-getopt-posix.tmp"
+#include "test-getopt-main.h"
diff --git a/src/grep/gnulib-tests/test-getopt.h b/src/grep/gnulib-tests/test-getopt.h
new file mode 100644
index 0000000..5cc9d8c
--- /dev/null
+++ b/src/grep/gnulib-tests/test-getopt.h
@@ -0,0 +1,1391 @@
+/* Test of command line argument processing.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+#include <stdbool.h>
+
+/* The glibc/gnulib implementation of getopt supports setting optind =
+   0, but not all other implementations do.  This matters for getopt.
+   But for getopt_long, we require GNU compatibility.  */
+#if defined __GETOPT_PREFIX || (__GLIBC__ >= 2 && !defined __UCLIBC__)
+# define OPTIND_MIN 0
+#elif HAVE_DECL_OPTRESET
+# define OPTIND_MIN (optreset = 1)
+#else
+# define OPTIND_MIN 1
+#endif
+
+static void
+getopt_loop (int argc, const char **argv,
+             const char *options,
+             int *a_seen, int *b_seen,
+             const char **p_value, const char **q_value,
+             int *non_options_count, const char **non_options,
+             int *unrecognized, bool *message_issued)
+{
+  int c;
+  int pos = ftell (stderr);
+
+  while ((c = getopt (argc, (char **) argv, options)) != -1)
+    {
+      switch (c)
+        {
+        case 'a':
+          (*a_seen)++;
+          break;
+        case 'b':
+          (*b_seen)++;
+          break;
+        case 'p':
+          *p_value = optarg;
+          break;
+        case 'q':
+          *q_value = optarg;
+          break;
+        case '\1':
+          /* Must only happen with option '-' at the beginning.  */
+          ASSERT (options[0] == '-');
+          non_options[(*non_options_count)++] = optarg;
+          break;
+        case ':':
+          /* Must only happen with option ':' at the beginning.  */
+          ASSERT (options[0] == ':'
+                  || ((options[0] == '-' || options[0] == '+')
+                      && options[1] == ':'));
+          FALLTHROUGH;
+        case '?':
+          *unrecognized = optopt;
+          break;
+        default:
+          *unrecognized = c;
+          break;
+        }
+    }
+
+  *message_issued = pos < ftell (stderr);
+}
+
+static void
+test_getopt (void)
+{
+  int start;
+  bool posixly = !!getenv ("POSIXLY_CORRECT");
+  /* See comment in getopt.c:
+     glibc gets a LSB-compliant getopt.
+     Standalone applications get a POSIX-compliant getopt.  */
+#if defined __GETOPT_PREFIX || !(__GLIBC__ >= 2 || defined __MINGW32__)
+  /* Using getopt from gnulib or from a non-glibc system.  */
+  posixly = true;
+#endif
+
+  /* Test processing of boolean options.  */
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-a";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "ab",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+      ASSERT (!output);
+    }
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-b";
+      argv[argc++] = "-a";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "ab",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 1);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 3);
+      ASSERT (!output);
+    }
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-ba";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "ab",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 1);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+      ASSERT (!output);
+    }
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-ab";
+      argv[argc++] = "-a";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "ab",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 2);
+      ASSERT (b_seen == 1);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 3);
+      ASSERT (!output);
+    }
+
+  /* Test processing of options with arguments.  */
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-pfoo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "p:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+      ASSERT (!output);
+    }
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "p:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 3);
+      ASSERT (!output);
+    }
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-ab";
+      argv[argc++] = "-q";
+      argv[argc++] = "baz";
+      argv[argc++] = "-pfoo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 1);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value != NULL && strcmp (q_value, "baz") == 0);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 5);
+      ASSERT (!output);
+    }
+
+#if GNULIB_TEST_GETOPT_GNU
+  /* Test processing of options with optional arguments.  */
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-pfoo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "p::q::",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+      ASSERT (!output);
+    }
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "p::q::",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+      ASSERT (!output);
+    }
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "abp::q::",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 3);
+      ASSERT (!output);
+    }
+#endif /* GNULIB_TEST_GETOPT_GNU */
+
+  /* Check that invalid options are recognized; and that both opterr
+     and leading ':' can silence output.  */
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc++] = "foo";
+      argv[argc++] = "-x";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 42;
+      getopt_loop (argc, argv, "abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 'x');
+      ASSERT (optind == 5);
+      ASSERT (output);
+    }
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc++] = "foo";
+      argv[argc++] = "-x";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 0;
+      getopt_loop (argc, argv, "abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 'x');
+      ASSERT (optind == 5);
+      ASSERT (!output);
+    }
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc++] = "foo";
+      argv[argc++] = "-x";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, ":abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 'x');
+      ASSERT (optind == 5);
+      ASSERT (!output);
+    }
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc++] = "foo";
+      argv[argc++] = "-:";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 42;
+      getopt_loop (argc, argv, "abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == ':');
+      ASSERT (optind == 5);
+      ASSERT (output);
+    }
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc++] = "foo";
+      argv[argc++] = "-:";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 0;
+      getopt_loop (argc, argv, "abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == ':');
+      ASSERT (optind == 5);
+      ASSERT (!output);
+    }
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc++] = "foo";
+      argv[argc++] = "-:";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, ":abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == ':');
+      ASSERT (optind == 5);
+      ASSERT (!output);
+    }
+
+  /* Check for missing argument behavior.  */
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-ap";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 'p');
+      ASSERT (optind == 2);
+      ASSERT (output);
+    }
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-ap";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 0;
+      getopt_loop (argc, argv, "abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 'p');
+      ASSERT (optind == 2);
+      ASSERT (!output);
+    }
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-ap";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, ":abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 'p');
+      ASSERT (optind == 2);
+      ASSERT (!output);
+    }
+
+  /* Check that by default, non-options arguments are moved to the end.  */
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      if (posixly)
+        {
+          ASSERT (strcmp (argv[0], "program") == 0);
+          ASSERT (strcmp (argv[1], "donald") == 0);
+          ASSERT (strcmp (argv[2], "-p") == 0);
+          ASSERT (strcmp (argv[3], "billy") == 0);
+          ASSERT (strcmp (argv[4], "duck") == 0);
+          ASSERT (strcmp (argv[5], "-a") == 0);
+          ASSERT (strcmp (argv[6], "bar") == 0);
+          ASSERT (argv[7] == NULL);
+          ASSERT (a_seen == 0);
+          ASSERT (b_seen == 0);
+          ASSERT (p_value == NULL);
+          ASSERT (q_value == NULL);
+          ASSERT (non_options_count == 0);
+          ASSERT (unrecognized == 0);
+          ASSERT (optind == 1);
+          ASSERT (!output);
+        }
+      else
+        {
+          ASSERT (strcmp (argv[0], "program") == 0);
+          ASSERT (strcmp (argv[1], "-p") == 0);
+          ASSERT (strcmp (argv[2], "billy") == 0);
+          ASSERT (strcmp (argv[3], "-a") == 0);
+          ASSERT (strcmp (argv[4], "donald") == 0);
+          ASSERT (strcmp (argv[5], "duck") == 0);
+          ASSERT (strcmp (argv[6], "bar") == 0);
+          ASSERT (argv[7] == NULL);
+          ASSERT (a_seen == 1);
+          ASSERT (b_seen == 0);
+          ASSERT (p_value != NULL && strcmp (p_value, "billy") == 0);
+          ASSERT (q_value == NULL);
+          ASSERT (non_options_count == 0);
+          ASSERT (unrecognized == 0);
+          ASSERT (optind == 4);
+          ASSERT (!output);
+        }
+    }
+
+  /* Check that '--' ends the argument processing.  */
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[20];
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "--";
+      argv[argc++] = "-b";
+      argv[argc++] = "foo";
+      argv[argc++] = "-q";
+      argv[argc++] = "johnny";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      if (posixly)
+        {
+          ASSERT (strcmp (argv[0], "program") == 0);
+          ASSERT (strcmp (argv[1], "donald") == 0);
+          ASSERT (strcmp (argv[2], "-p") == 0);
+          ASSERT (strcmp (argv[3], "billy") == 0);
+          ASSERT (strcmp (argv[4], "duck") == 0);
+          ASSERT (strcmp (argv[5], "-a") == 0);
+          ASSERT (strcmp (argv[6], "--") == 0);
+          ASSERT (strcmp (argv[7], "-b") == 0);
+          ASSERT (strcmp (argv[8], "foo") == 0);
+          ASSERT (strcmp (argv[9], "-q") == 0);
+          ASSERT (strcmp (argv[10], "johnny") == 0);
+          ASSERT (strcmp (argv[11], "bar") == 0);
+          ASSERT (argv[12] == NULL);
+          ASSERT (a_seen == 0);
+          ASSERT (b_seen == 0);
+          ASSERT (p_value == NULL);
+          ASSERT (q_value == NULL);
+          ASSERT (non_options_count == 0);
+          ASSERT (unrecognized == 0);
+          ASSERT (optind == 1);
+          ASSERT (!output);
+        }
+      else
+        {
+          ASSERT (strcmp (argv[0], "program") == 0);
+          ASSERT (strcmp (argv[1], "-p") == 0);
+          ASSERT (strcmp (argv[2], "billy") == 0);
+          ASSERT (strcmp (argv[3], "-a") == 0);
+          ASSERT (strcmp (argv[4], "--") == 0);
+          ASSERT (strcmp (argv[5], "donald") == 0);
+          ASSERT (strcmp (argv[6], "duck") == 0);
+          ASSERT (strcmp (argv[7], "-b") == 0);
+          ASSERT (strcmp (argv[8], "foo") == 0);
+          ASSERT (strcmp (argv[9], "-q") == 0);
+          ASSERT (strcmp (argv[10], "johnny") == 0);
+          ASSERT (strcmp (argv[11], "bar") == 0);
+          ASSERT (argv[12] == NULL);
+          ASSERT (a_seen == 1);
+          ASSERT (b_seen == 0);
+          ASSERT (p_value != NULL && strcmp (p_value, "billy") == 0);
+          ASSERT (q_value == NULL);
+          ASSERT (non_options_count == 0);
+          ASSERT (unrecognized == 0);
+          ASSERT (optind == 5);
+          ASSERT (!output);
+        }
+    }
+
+#if GNULIB_TEST_GETOPT_GNU
+  /* Check that the '-' flag causes non-options to be returned in order.  */
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "-abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (strcmp (argv[0], "program") == 0);
+      ASSERT (strcmp (argv[1], "donald") == 0);
+      ASSERT (strcmp (argv[2], "-p") == 0);
+      ASSERT (strcmp (argv[3], "billy") == 0);
+      ASSERT (strcmp (argv[4], "duck") == 0);
+      ASSERT (strcmp (argv[5], "-a") == 0);
+      ASSERT (strcmp (argv[6], "bar") == 0);
+      ASSERT (argv[7] == NULL);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "billy") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 3);
+      ASSERT (strcmp (non_options[0], "donald") == 0);
+      ASSERT (strcmp (non_options[1], "duck") == 0);
+      ASSERT (strcmp (non_options[2], "bar") == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 7);
+      ASSERT (!output);
+    }
+
+  /* Check that '--' ends the argument processing.  */
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[20];
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "--";
+      argv[argc++] = "-b";
+      argv[argc++] = "foo";
+      argv[argc++] = "-q";
+      argv[argc++] = "johnny";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "-abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (strcmp (argv[0], "program") == 0);
+      ASSERT (strcmp (argv[1], "donald") == 0);
+      ASSERT (strcmp (argv[2], "-p") == 0);
+      ASSERT (strcmp (argv[3], "billy") == 0);
+      ASSERT (strcmp (argv[4], "duck") == 0);
+      ASSERT (strcmp (argv[5], "-a") == 0);
+      ASSERT (strcmp (argv[6], "--") == 0);
+      ASSERT (strcmp (argv[7], "-b") == 0);
+      ASSERT (strcmp (argv[8], "foo") == 0);
+      ASSERT (strcmp (argv[9], "-q") == 0);
+      ASSERT (strcmp (argv[10], "johnny") == 0);
+      ASSERT (strcmp (argv[11], "bar") == 0);
+      ASSERT (argv[12] == NULL);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "billy") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (!output);
+      if (non_options_count == 2)
+        {
+          /* glibc behaviour.  */
+          ASSERT (non_options_count == 2);
+          ASSERT (strcmp (non_options[0], "donald") == 0);
+          ASSERT (strcmp (non_options[1], "duck") == 0);
+          ASSERT (unrecognized == 0);
+          ASSERT (optind == 7);
+        }
+      else
+        {
+          /* Another valid behaviour.  */
+          ASSERT (non_options_count == 7);
+          ASSERT (strcmp (non_options[0], "donald") == 0);
+          ASSERT (strcmp (non_options[1], "duck") == 0);
+          ASSERT (strcmp (non_options[2], "-b") == 0);
+          ASSERT (strcmp (non_options[3], "foo") == 0);
+          ASSERT (strcmp (non_options[4], "-q") == 0);
+          ASSERT (strcmp (non_options[5], "johnny") == 0);
+          ASSERT (strcmp (non_options[6], "bar") == 0);
+          ASSERT (unrecognized == 0);
+          ASSERT (optind == 12);
+        }
+    }
+
+  /* Check that the '-' flag has to come first.  */
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "abp:q:-",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      if (posixly)
+        {
+          ASSERT (strcmp (argv[0], "program") == 0);
+          ASSERT (strcmp (argv[1], "donald") == 0);
+          ASSERT (strcmp (argv[2], "-p") == 0);
+          ASSERT (strcmp (argv[3], "billy") == 0);
+          ASSERT (strcmp (argv[4], "duck") == 0);
+          ASSERT (strcmp (argv[5], "-a") == 0);
+          ASSERT (strcmp (argv[6], "bar") == 0);
+          ASSERT (argv[7] == NULL);
+          ASSERT (a_seen == 0);
+          ASSERT (b_seen == 0);
+          ASSERT (p_value == NULL);
+          ASSERT (q_value == NULL);
+          ASSERT (non_options_count == 0);
+          ASSERT (unrecognized == 0);
+          ASSERT (optind == 1);
+          ASSERT (!output);
+        }
+      else
+        {
+          ASSERT (strcmp (argv[0], "program") == 0);
+          ASSERT (strcmp (argv[1], "-p") == 0);
+          ASSERT (strcmp (argv[2], "billy") == 0);
+          ASSERT (strcmp (argv[3], "-a") == 0);
+          ASSERT (strcmp (argv[4], "donald") == 0);
+          ASSERT (strcmp (argv[5], "duck") == 0);
+          ASSERT (strcmp (argv[6], "bar") == 0);
+          ASSERT (argv[7] == NULL);
+          ASSERT (a_seen == 1);
+          ASSERT (b_seen == 0);
+          ASSERT (p_value != NULL && strcmp (p_value, "billy") == 0);
+          ASSERT (q_value == NULL);
+          ASSERT (non_options_count == 0);
+          ASSERT (unrecognized == 0);
+          ASSERT (optind == 4);
+          ASSERT (!output);
+        }
+    }
+
+  /* Check that the '+' flag causes the first non-option to terminate the
+     loop.  */
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "+abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (strcmp (argv[0], "program") == 0);
+      ASSERT (strcmp (argv[1], "donald") == 0);
+      ASSERT (strcmp (argv[2], "-p") == 0);
+      ASSERT (strcmp (argv[3], "billy") == 0);
+      ASSERT (strcmp (argv[4], "duck") == 0);
+      ASSERT (strcmp (argv[5], "-a") == 0);
+      ASSERT (strcmp (argv[6], "bar") == 0);
+      ASSERT (argv[7] == NULL);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 1);
+      ASSERT (!output);
+    }
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-+";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_loop (argc, argv, "+abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == '+');
+      ASSERT (optind == 2);
+      ASSERT (output);
+    }
+
+  /* Check that '--' ends the argument processing.  */
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[20];
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "--";
+      argv[argc++] = "-b";
+      argv[argc++] = "foo";
+      argv[argc++] = "-q";
+      argv[argc++] = "johnny";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "+abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (strcmp (argv[0], "program") == 0);
+      ASSERT (strcmp (argv[1], "donald") == 0);
+      ASSERT (strcmp (argv[2], "-p") == 0);
+      ASSERT (strcmp (argv[3], "billy") == 0);
+      ASSERT (strcmp (argv[4], "duck") == 0);
+      ASSERT (strcmp (argv[5], "-a") == 0);
+      ASSERT (strcmp (argv[6], "--") == 0);
+      ASSERT (strcmp (argv[7], "-b") == 0);
+      ASSERT (strcmp (argv[8], "foo") == 0);
+      ASSERT (strcmp (argv[9], "-q") == 0);
+      ASSERT (strcmp (argv[10], "johnny") == 0);
+      ASSERT (strcmp (argv[11], "bar") == 0);
+      ASSERT (argv[12] == NULL);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 1);
+      ASSERT (!output);
+    }
+#endif /* GNULIB_TEST_GETOPT_GNU */
+
+  /* Check that the '+' flag has to come first.  */
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "abp:q:+",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      if (posixly)
+        {
+          ASSERT (strcmp (argv[0], "program") == 0);
+          ASSERT (strcmp (argv[1], "donald") == 0);
+          ASSERT (strcmp (argv[2], "-p") == 0);
+          ASSERT (strcmp (argv[3], "billy") == 0);
+          ASSERT (strcmp (argv[4], "duck") == 0);
+          ASSERT (strcmp (argv[5], "-a") == 0);
+          ASSERT (strcmp (argv[6], "bar") == 0);
+          ASSERT (argv[7] == NULL);
+          ASSERT (a_seen == 0);
+          ASSERT (b_seen == 0);
+          ASSERT (p_value == NULL);
+          ASSERT (q_value == NULL);
+          ASSERT (non_options_count == 0);
+          ASSERT (unrecognized == 0);
+          ASSERT (optind == 1);
+          ASSERT (!output);
+        }
+      else
+        {
+          ASSERT (strcmp (argv[0], "program") == 0);
+          ASSERT (strcmp (argv[1], "-p") == 0);
+          ASSERT (strcmp (argv[2], "billy") == 0);
+          ASSERT (strcmp (argv[3], "-a") == 0);
+          ASSERT (strcmp (argv[4], "donald") == 0);
+          ASSERT (strcmp (argv[5], "duck") == 0);
+          ASSERT (strcmp (argv[6], "bar") == 0);
+          ASSERT (argv[7] == NULL);
+          ASSERT (a_seen == 1);
+          ASSERT (b_seen == 0);
+          ASSERT (p_value != NULL && strcmp (p_value, "billy") == 0);
+          ASSERT (q_value == NULL);
+          ASSERT (non_options_count == 0);
+          ASSERT (unrecognized == 0);
+          ASSERT (optind == 4);
+          ASSERT (!output);
+        }
+    }
+
+#if GNULIB_TEST_GETOPT_GNU
+  /* If GNU extensions are supported, require compliance with POSIX
+     interpretation on leading '+' behavior.
+     http://austingroupbugs.net/view.php?id=191  */
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      getopt_loop (argc, argv, "+:abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (strcmp (argv[0], "program") == 0);
+      ASSERT (strcmp (argv[1], "donald") == 0);
+      ASSERT (strcmp (argv[2], "-p") == 0);
+      ASSERT (strcmp (argv[3], "billy") == 0);
+      ASSERT (strcmp (argv[4], "duck") == 0);
+      ASSERT (strcmp (argv[5], "-a") == 0);
+      ASSERT (strcmp (argv[6], "bar") == 0);
+      ASSERT (argv[7] == NULL);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 1);
+      ASSERT (!output);
+    }
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_loop (argc, argv, "+:abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 'p');
+      ASSERT (optind == 2);
+      ASSERT (!output);
+    }
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int a_seen = 0;
+      int b_seen = 0;
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      bool output;
+      int argc = 0;
+      const char *argv[10];
+
+      argv[argc++] = "program";
+      argv[argc++] = "-b";
+      argv[argc++] = "-p";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_loop (argc, argv, "+:abp:q:",
+                   &a_seen, &b_seen, &p_value, &q_value,
+                   &non_options_count, non_options, &unrecognized, &output);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 1);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 'p');
+      ASSERT (optind == 3);
+      ASSERT (!output);
+    }
+
+  /* Check that 'W' does not dump core:
+     https://sourceware.org/bugzilla/show_bug.cgi?id=12922
+     Technically, POSIX says the presence of ';' in the opt-string
+     gives unspecified behavior, so we only test this when GNU compliance
+     is desired.  */
+  for (start = OPTIND_MIN; start <= 1; start++)
+    {
+      int argc = 0;
+      const char *argv[10];
+      int pos = ftell (stderr);
+
+      argv[argc++] = "program";
+      argv[argc++] = "-W";
+      argv[argc++] = "dummy";
+      argv[argc] = NULL;
+      optind = start;
+      opterr = 1;
+      ASSERT (getopt (argc, (char **) argv, "W;") == 'W');
+      ASSERT (ftell (stderr) == pos);
+      ASSERT (optind == 2);
+    }
+#endif /* GNULIB_TEST_GETOPT_GNU */
+}
diff --git a/src/grep/gnulib-tests/test-getopt_long.h b/src/grep/gnulib-tests/test-getopt_long.h
new file mode 100644
index 0000000..5e3c50a
--- /dev/null
+++ b/src/grep/gnulib-tests/test-getopt_long.h
@@ -0,0 +1,2144 @@
+/* Test of command line argument processing.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+static int a_seen;
+static int b_seen;
+static int q_seen;
+
+static const struct option long_options_required[] =
+  {
+    { "alpha",    no_argument,       NULL, 'a' },
+    { "beta",     no_argument,       &b_seen, 1 },
+    { "prune",    required_argument, NULL, 'p' },
+    { "quetsche", required_argument, &q_seen, 1 },
+    { "xtremely-",no_argument,       NULL, 1003 },
+    { "xtra",     no_argument,       NULL, 1001 },
+    { "xtreme",   no_argument,       NULL, 1002 },
+    { "xtremely", no_argument,       NULL, 1003 },
+    { NULL,       0,                 NULL, 0 }
+  };
+
+static const struct option long_options_optional[] =
+  {
+    { "alpha",    no_argument,       NULL, 'a' },
+    { "beta",     no_argument,       &b_seen, 1 },
+    { "prune",    optional_argument, NULL, 'p' },
+    { "quetsche", optional_argument, &q_seen, 1 },
+    { NULL,       0,                 NULL, 0 }
+  };
+
+static void
+getopt_long_loop (int argc, const char **argv,
+                  const char *options, const struct option *long_options,
+                  const char **p_value, const char **q_value,
+                  int *non_options_count, const char **non_options,
+                  int *unrecognized)
+{
+  int option_index = -1;
+  int c;
+
+  opterr = 0;
+  q_seen = 0;
+  while ((c = getopt_long (argc, (char **) argv, options, long_options,
+                           &option_index))
+         != -1)
+    {
+      switch (c)
+        {
+        case 0:
+          /* An option with a non-NULL flag pointer was processed.  */
+          if (q_seen)
+            *q_value = optarg;
+          break;
+        case 'a':
+          a_seen++;
+          break;
+        case 'b':
+          b_seen = 1;
+          break;
+        case 'p':
+          *p_value = optarg;
+          break;
+        case 'q':
+          *q_value = optarg;
+          break;
+        case '\1':
+          /* Must only happen with option '-' at the beginning.  */
+          ASSERT (options[0] == '-');
+          non_options[(*non_options_count)++] = optarg;
+          break;
+        case ':':
+          /* Must only happen with option ':' at the beginning.  */
+          ASSERT (options[0] == ':'
+                  || ((options[0] == '-' || options[0] == '+')
+                      && options[1] == ':'));
+          FALLTHROUGH;
+        case '?':
+          *unrecognized = optopt;
+          break;
+        default:
+          *unrecognized = c;
+          break;
+        }
+    }
+}
+
+/* Reduce casting, so we can use string literals elsewhere.
+   getopt_long takes an array of char*, but luckily does not modify
+   those elements, so we can pass const char*.  */
+static int
+do_getopt_long (int argc, const char **argv, const char *shortopts,
+                const struct option *longopts, int *longind)
+{
+  return getopt_long (argc, (char **) argv, shortopts, longopts, longind);
+}
+
+static void
+test_getopt_long (void)
+{
+  int start;
+
+  /* Test disambiguation of options.  */
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "--x";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long (argc, argv, "ab", long_options_required, &option_index);
+    ASSERT (c == '?');
+    ASSERT (optopt == 0);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "--xt";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long (argc, argv, "ab", long_options_required, &option_index);
+    ASSERT (c == '?');
+    ASSERT (optopt == 0);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "--xtr";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long (argc, argv, "ab", long_options_required, &option_index);
+    ASSERT (c == '?');
+    ASSERT (optopt == 0);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "--xtra";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long (argc, argv, "ab", long_options_required, &option_index);
+    ASSERT (c == 1001);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "--xtre";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long (argc, argv, "ab", long_options_required, &option_index);
+    ASSERT (c == '?');
+    ASSERT (optopt == 0);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "--xtrem";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long (argc, argv, "ab", long_options_required, &option_index);
+    ASSERT (c == '?');
+    ASSERT (optopt == 0);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "--xtreme";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long (argc, argv, "ab", long_options_required, &option_index);
+    ASSERT (c == 1002);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "--xtremel";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long (argc, argv, "ab", long_options_required, &option_index);
+    ASSERT (c == 1003);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "--xtremely";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long (argc, argv, "ab", long_options_required, &option_index);
+    ASSERT (c == 1003);
+  }
+
+  /* Check that -W handles unknown options.  */
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "-W";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long (argc, argv, "W;", long_options_required, &option_index);
+    ASSERT (c == '?');
+    ASSERT (optopt == 'W');
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "-Wunknown";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long (argc, argv, "W;", long_options_required, &option_index);
+    /* glibc and BSD behave differently here, but for now, we allow
+       both behaviors since W support is not frequently used.  */
+    if (c == '?')
+      {
+        ASSERT (optopt == 0);
+        ASSERT (optarg == NULL);
+      }
+    else
+      {
+        ASSERT (c == 'W');
+        ASSERT (strcmp (optarg, "unknown") == 0);
+      }
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "-W";
+    argv[argc++] = "unknown";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long (argc, argv, "W;", long_options_required, &option_index);
+    /* glibc and BSD behave differently here, but for now, we allow
+       both behaviors since W support is not frequently used.  */
+    if (c == '?')
+      {
+        ASSERT (optopt == 0);
+        ASSERT (optarg == NULL);
+      }
+    else
+      {
+        ASSERT (c == 'W');
+        ASSERT (strcmp (optarg, "unknown") == 0);
+      }
+  }
+
+  /* Test that 'W' does not dump core:
+     https://sourceware.org/bugzilla/show_bug.cgi?id=12922  */
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "-W";
+    argv[argc++] = "dummy";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long (argc, argv, "W;", NULL, &option_index);
+    ASSERT (c == 'W');
+    ASSERT (optind == 2);
+  }
+
+  /* Test processing of boolean short options.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-a";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "ab", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-b";
+      argv[argc++] = "-a";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "ab", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 1);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 3);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-ba";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "ab", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 1);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-ab";
+      argv[argc++] = "-a";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "ab", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 2);
+      ASSERT (b_seen == 1);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 3);
+    }
+
+  /* Test processing of boolean long options.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "--alpha";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "ab", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "--beta";
+      argv[argc++] = "--alpha";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "ab", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 1);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 3);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "--alpha";
+      argv[argc++] = "--beta";
+      argv[argc++] = "--alpha";
+      argv[argc++] = "--beta";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "ab", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 2);
+      ASSERT (b_seen == 1);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 5);
+    }
+
+  /* Test processing of boolean long options via -W.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-Walpha";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "abW;", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-W";
+      argv[argc++] = "beta";
+      argv[argc++] = "-W";
+      argv[argc++] = "alpha";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "aW;b", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 1);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 5);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-Walpha";
+      argv[argc++] = "-Wbeta";
+      argv[argc++] = "-Walpha";
+      argv[argc++] = "-Wbeta";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "W;ab", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 2);
+      ASSERT (b_seen == 1);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 5);
+    }
+
+  /* Test processing of short options with arguments.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-pfoo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "p:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "p:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 3);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-ab";
+      argv[argc++] = "-q";
+      argv[argc++] = "baz";
+      argv[argc++] = "-pfoo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "abp:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 1);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value != NULL && strcmp (q_value, "baz") == 0);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 5);
+    }
+
+  /* Test processing of long options with arguments.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "--p=foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "p:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "--p";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "p:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 3);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-ab";
+      argv[argc++] = "--q";
+      argv[argc++] = "baz";
+      argv[argc++] = "--p=foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "abp:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 1);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value != NULL && strcmp (q_value, "baz") == 0);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 5);
+    }
+
+  /* Test processing of long options with arguments via -W.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-Wp=foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "p:q:W;", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-W";
+      argv[argc++] = "p";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "p:W;q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 4);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-ab";
+      argv[argc++] = "-Wq";
+      argv[argc++] = "baz";
+      argv[argc++] = "-W";
+      argv[argc++] = "p=foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "W;abp:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 1);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value != NULL && strcmp (q_value, "baz") == 0);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 6);
+    }
+
+  /* Test processing of short options with optional arguments.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-pfoo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "p::q::", long_options_optional,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "p::q::", long_options_optional,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "abp::q::", long_options_optional,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 3);
+    }
+
+  /* Test processing of long options with optional arguments.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "--p=foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "p::q::", long_options_optional,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "--p";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "p::q::", long_options_optional,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "--p=";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "p::q::", long_options_optional,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && *p_value == '\0');
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "--p";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "abp::q::", long_options_optional,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 3);
+    }
+
+  /* Test processing of long options with optional arguments via -W.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-Wp=foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "p::q::W;", long_options_optional,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-Wp";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "p::q::W;", long_options_optional,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-Wp=";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "W;p::q::", long_options_optional,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && *p_value == '\0');
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-W";
+      argv[argc++] = "p=";
+      argv[argc++] = "foo";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "W;p::q::", long_options_optional,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && *p_value == '\0');
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 3);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-W";
+      argv[argc++] = "p";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "W;abp::q::", long_options_optional,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      /* ASSERT (p_value == NULL); */
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 4);
+    }
+
+  /* Check that invalid options are recognized.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc++] = "foo";
+      argv[argc++] = "-x";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "abp:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 'x');
+      ASSERT (optind == 5);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc++] = "foo";
+      argv[argc++] = "-:";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "abp:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == ':');
+      ASSERT (optind == 5);
+    }
+
+  /* Check that unexpected arguments are recognized.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc++] = "foo";
+      argv[argc++] = "--a=";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "abp:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 'a');
+      ASSERT (optind == 4);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc++] = "foo";
+      argv[argc++] = "--b=";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "abp:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "foo") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      /* When flag is non-zero, glibc sets optopt anyway, but BSD
+         leaves optopt unchanged.  */
+      ASSERT (unrecognized == 1 || unrecognized == 0);
+      ASSERT (optind == 4);
+    }
+
+  /* Check that by default, non-options arguments are moved to the end.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "abp:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (strcmp (argv[0], "program") == 0);
+      ASSERT (strcmp (argv[1], "-p") == 0);
+      ASSERT (strcmp (argv[2], "billy") == 0);
+      ASSERT (strcmp (argv[3], "-a") == 0);
+      ASSERT (strcmp (argv[4], "donald") == 0);
+      ASSERT (strcmp (argv[5], "duck") == 0);
+      ASSERT (strcmp (argv[6], "bar") == 0);
+      ASSERT (argv[7] == NULL);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "billy") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 4);
+    }
+
+  /* Check that '--' ends the argument processing.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[20];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "--";
+      argv[argc++] = "-b";
+      argv[argc++] = "foo";
+      argv[argc++] = "-q";
+      argv[argc++] = "johnny";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "abp:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (strcmp (argv[0], "program") == 0);
+      ASSERT (strcmp (argv[1], "-p") == 0);
+      ASSERT (strcmp (argv[2], "billy") == 0);
+      ASSERT (strcmp (argv[3], "-a") == 0);
+      ASSERT (strcmp (argv[4], "--") == 0);
+      ASSERT (strcmp (argv[5], "donald") == 0);
+      ASSERT (strcmp (argv[6], "duck") == 0);
+      ASSERT (strcmp (argv[7], "-b") == 0);
+      ASSERT (strcmp (argv[8], "foo") == 0);
+      ASSERT (strcmp (argv[9], "-q") == 0);
+      ASSERT (strcmp (argv[10], "johnny") == 0);
+      ASSERT (strcmp (argv[11], "bar") == 0);
+      ASSERT (argv[12] == NULL);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "billy") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 5);
+    }
+
+  /* Check that the '-' flag causes non-options to be returned in order.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "-abp:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (strcmp (argv[0], "program") == 0);
+      ASSERT (strcmp (argv[1], "donald") == 0);
+      ASSERT (strcmp (argv[2], "-p") == 0);
+      ASSERT (strcmp (argv[3], "billy") == 0);
+      ASSERT (strcmp (argv[4], "duck") == 0);
+      ASSERT (strcmp (argv[5], "-a") == 0);
+      ASSERT (strcmp (argv[6], "bar") == 0);
+      ASSERT (argv[7] == NULL);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "billy") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 3);
+      ASSERT (strcmp (non_options[0], "donald") == 0);
+      ASSERT (strcmp (non_options[1], "duck") == 0);
+      ASSERT (strcmp (non_options[2], "bar") == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 7);
+    }
+
+  /* Check that '--' ends the argument processing.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[20];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "--";
+      argv[argc++] = "-b";
+      argv[argc++] = "foo";
+      argv[argc++] = "-q";
+      argv[argc++] = "johnny";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "-abp:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (strcmp (argv[0], "program") == 0);
+      ASSERT (strcmp (argv[1], "donald") == 0);
+      ASSERT (strcmp (argv[2], "-p") == 0);
+      ASSERT (strcmp (argv[3], "billy") == 0);
+      ASSERT (strcmp (argv[4], "duck") == 0);
+      ASSERT (strcmp (argv[5], "-a") == 0);
+      ASSERT (strcmp (argv[6], "--") == 0);
+      ASSERT (strcmp (argv[7], "-b") == 0);
+      ASSERT (strcmp (argv[8], "foo") == 0);
+      ASSERT (strcmp (argv[9], "-q") == 0);
+      ASSERT (strcmp (argv[10], "johnny") == 0);
+      ASSERT (strcmp (argv[11], "bar") == 0);
+      ASSERT (argv[12] == NULL);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "billy") == 0);
+      ASSERT (q_value == NULL);
+      if (non_options_count == 2)
+      {
+        /* glibc behaviour.  */
+        ASSERT (non_options_count == 2);
+        ASSERT (strcmp (non_options[0], "donald") == 0);
+        ASSERT (strcmp (non_options[1], "duck") == 0);
+        ASSERT (unrecognized == 0);
+        ASSERT (optind == 7);
+      }
+      else
+      {
+        /* Another valid behaviour.  */
+        ASSERT (non_options_count == 7);
+        ASSERT (strcmp (non_options[0], "donald") == 0);
+        ASSERT (strcmp (non_options[1], "duck") == 0);
+        ASSERT (strcmp (non_options[2], "-b") == 0);
+        ASSERT (strcmp (non_options[3], "foo") == 0);
+        ASSERT (strcmp (non_options[4], "-q") == 0);
+        ASSERT (strcmp (non_options[5], "johnny") == 0);
+        ASSERT (strcmp (non_options[6], "bar") == 0);
+        ASSERT (unrecognized == 0);
+        ASSERT (optind == 12);
+      }
+    }
+
+  /* Check that the '-' flag has to come first.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "abp:q:-", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (strcmp (argv[0], "program") == 0);
+      ASSERT (strcmp (argv[1], "-p") == 0);
+      ASSERT (strcmp (argv[2], "billy") == 0);
+      ASSERT (strcmp (argv[3], "-a") == 0);
+      ASSERT (strcmp (argv[4], "donald") == 0);
+      ASSERT (strcmp (argv[5], "duck") == 0);
+      ASSERT (strcmp (argv[6], "bar") == 0);
+      ASSERT (argv[7] == NULL);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "billy") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 4);
+    }
+
+  /* Check that the '+' flag causes the first non-option to terminate the
+     loop.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "+abp:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (strcmp (argv[0], "program") == 0);
+      ASSERT (strcmp (argv[1], "donald") == 0);
+      ASSERT (strcmp (argv[2], "-p") == 0);
+      ASSERT (strcmp (argv[3], "billy") == 0);
+      ASSERT (strcmp (argv[4], "duck") == 0);
+      ASSERT (strcmp (argv[5], "-a") == 0);
+      ASSERT (strcmp (argv[6], "bar") == 0);
+      ASSERT (argv[7] == NULL);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 1);
+    }
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-+";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "+abp:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == '+');
+      ASSERT (optind == 2);
+    }
+
+  /* Check that '--' ends the argument processing.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[20];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "--";
+      argv[argc++] = "-b";
+      argv[argc++] = "foo";
+      argv[argc++] = "-q";
+      argv[argc++] = "johnny";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "+abp:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (strcmp (argv[0], "program") == 0);
+      ASSERT (strcmp (argv[1], "donald") == 0);
+      ASSERT (strcmp (argv[2], "-p") == 0);
+      ASSERT (strcmp (argv[3], "billy") == 0);
+      ASSERT (strcmp (argv[4], "duck") == 0);
+      ASSERT (strcmp (argv[5], "-a") == 0);
+      ASSERT (strcmp (argv[6], "--") == 0);
+      ASSERT (strcmp (argv[7], "-b") == 0);
+      ASSERT (strcmp (argv[8], "foo") == 0);
+      ASSERT (strcmp (argv[9], "-q") == 0);
+      ASSERT (strcmp (argv[10], "johnny") == 0);
+      ASSERT (strcmp (argv[11], "bar") == 0);
+      ASSERT (argv[12] == NULL);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 1);
+    }
+
+  /* Check that the '+' flag has to come first.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "abp:q:+", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (strcmp (argv[0], "program") == 0);
+      ASSERT (strcmp (argv[1], "-p") == 0);
+      ASSERT (strcmp (argv[2], "billy") == 0);
+      ASSERT (strcmp (argv[3], "-a") == 0);
+      ASSERT (strcmp (argv[4], "donald") == 0);
+      ASSERT (strcmp (argv[5], "duck") == 0);
+      ASSERT (strcmp (argv[6], "bar") == 0);
+      ASSERT (argv[7] == NULL);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value != NULL && strcmp (p_value, "billy") == 0);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 4);
+    }
+}
+
+/* Test behavior of getopt_long when POSIXLY_CORRECT is set in the
+   environment.  Options with optional arguments should not change
+   behavior just because of an environment variable.
+   https://lists.gnu.org/r/bug-m4/2006-09/msg00028.html  */
+static void
+test_getopt_long_posix (void)
+{
+  int start;
+
+  /* Check that POSIXLY_CORRECT stops parsing the same as leading '+'.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "donald";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc++] = "duck";
+      argv[argc++] = "-a";
+      argv[argc++] = "bar";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "abp:q:", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (strcmp (argv[0], "program") == 0);
+      ASSERT (strcmp (argv[1], "donald") == 0);
+      ASSERT (strcmp (argv[2], "-p") == 0);
+      ASSERT (strcmp (argv[3], "billy") == 0);
+      ASSERT (strcmp (argv[4], "duck") == 0);
+      ASSERT (strcmp (argv[5], "-a") == 0);
+      ASSERT (strcmp (argv[6], "bar") == 0);
+      ASSERT (argv[7] == NULL);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 1);
+    }
+
+  /* Check that POSIXLY_CORRECT doesn't change optional arguments.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-p";
+      argv[argc++] = "billy";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "p::", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 0);
+      ASSERT (b_seen == 0);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 2);
+    }
+
+  /* Check that leading - still sees options after non-options.  */
+  for (start = 0; start <= 1; start++)
+    {
+      const char *p_value = NULL;
+      const char *q_value = NULL;
+      int non_options_count = 0;
+      const char *non_options[10];
+      int unrecognized = 0;
+      int argc = 0;
+      const char *argv[10];
+      a_seen = 0;
+      b_seen = 0;
+
+      argv[argc++] = "program";
+      argv[argc++] = "-a";
+      argv[argc++] = "billy";
+      argv[argc++] = "-b";
+      argv[argc] = NULL;
+      optind = start;
+      getopt_long_loop (argc, argv, "-ab", long_options_required,
+                        &p_value, &q_value,
+                        &non_options_count, non_options, &unrecognized);
+      ASSERT (a_seen == 1);
+      ASSERT (b_seen == 1);
+      ASSERT (p_value == NULL);
+      ASSERT (q_value == NULL);
+      ASSERT (non_options_count == 1);
+      ASSERT (strcmp (non_options[0], "billy") == 0);
+      ASSERT (unrecognized == 0);
+      ASSERT (optind == 4);
+    }
+}
+
+/* Reduce casting, so we can use string literals elsewhere.
+   getopt_long_only takes an array of char*, but luckily does not
+   modify those elements, so we can pass const char*.  */
+static int
+do_getopt_long_only (int argc, const char **argv, const char *shortopts,
+                     const struct option *longopts, int *longind)
+{
+  return getopt_long_only (argc, (char **) argv, shortopts, longopts, longind);
+}
+
+static void
+test_getopt_long_only (void)
+{
+  /* Test disambiguation of options.  */
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "-x";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long_only (argc, argv, "ab", long_options_required,
+                             &option_index);
+    ASSERT (c == '?');
+    ASSERT (optopt == 0);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "-x";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long_only (argc, argv, "abx", long_options_required,
+                             &option_index);
+    ASSERT (c == 'x');
+    ASSERT (optopt == 0);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "--x";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long_only (argc, argv, "abx", long_options_required,
+                             &option_index);
+    ASSERT (c == '?');
+    ASSERT (optopt == 0);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "-b";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    b_seen = 0;
+    c = do_getopt_long_only (argc, argv, "abx", long_options_required,
+                             &option_index);
+    ASSERT (c == 'b');
+    ASSERT (b_seen == 0);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "--b";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    b_seen = 0;
+    c = do_getopt_long_only (argc, argv, "abx", long_options_required,
+                             &option_index);
+    ASSERT (c == 0);
+    ASSERT (b_seen == 1);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "-xt";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long_only (argc, argv, "ab", long_options_required,
+                             &option_index);
+    ASSERT (c == '?');
+    ASSERT (optopt == 0);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "-xt";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long_only (argc, argv, "abx", long_options_required,
+                             &option_index);
+    ASSERT (c == '?');
+    ASSERT (optopt == 0);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "-xtra";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long_only (argc, argv, "ab", long_options_required,
+                             &option_index);
+    ASSERT (c == 1001);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "-xtreme";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long_only (argc, argv, "abx:", long_options_required,
+                             &option_index);
+    ASSERT (c == 1002);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "-xtremel";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long_only (argc, argv, "ab", long_options_required,
+                             &option_index);
+    /* glibc getopt_long_only is intentionally different from
+       getopt_long when handling a prefix that is common to two
+       spellings, when both spellings have the same option directives.
+       BSD getopt_long_only treats both cases the same.  */
+    ASSERT (c == 1003 || c == '?');
+    ASSERT (optind == 2);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "-xtremel";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long_only (argc, argv, "abx::", long_options_required,
+                             &option_index);
+    /* glibc getopt_long_only is intentionally different from
+       getopt_long when handling a prefix that is common to two
+       spellings, when both spellings have the same option directives.
+       BSD getopt_long_only treats both cases the same.  */
+    ASSERT (c == 1003 || c == '?');
+    ASSERT (optind == 2);
+    ASSERT (optarg == NULL);
+  }
+  {
+    int argc = 0;
+    const char *argv[10];
+    int option_index;
+    int c;
+
+    argv[argc++] = "program";
+    argv[argc++] = "-xtras";
+    argv[argc] = NULL;
+    optind = 1;
+    opterr = 0;
+    c = do_getopt_long_only (argc, argv, "abx::", long_options_required,
+                             &option_index);
+    ASSERT (c == 'x');
+    ASSERT (strcmp (optarg, "tras") == 0);
+  }
+}
diff --git a/src/grep/gnulib-tests/test-getprogname.c b/src/grep/gnulib-tests/test-getprogname.c
new file mode 100644
index 0000000..21eb338
--- /dev/null
+++ b/src/grep/gnulib-tests/test-getprogname.c
@@ -0,0 +1,58 @@
+/* Test the gnulib getprogname module.
+   Copyright (C) 2016-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "getprogname.h"
+#include <string.h>
+#include <assert.h>
+
+#ifdef __hpux
+# define STREQ(a, b) (strncmp (a, b, 14) == 0)
+#else
+# define STREQ(a, b) (strcmp (a, b) == 0)
+#endif
+
+int
+main (void)
+{
+  char const *p = getprogname ();
+
+  /* libtool creates a temporary executable whose name is sometimes prefixed
+     with "lt-" (depends on the platform).  But the name of the temporary
+     executable is a detail that should not be visible to the end user and to
+     the test suite.  Remove this "lt-" prefix here.  */
+  if (strncmp (p, "lt-", 3) == 0)
+    p += 3;
+
+  /* Note: You can make this test fail
+     a) by running it on a case-insensitive file system (such as on Windows,
+        Cygwin, or on Mac OS X with a case-insensitive HFS+ file system),
+        with an invocation that contains upper case characters, e.g.
+        test-GETPROGNAME,
+     b) by hardlinking or symlinking it to a different name (e.g. test-foo)
+        and invoking it through that name.
+     That's not the intended use. The Makefile always invokes it as
+     'test-getprogname${EXEEXT}'. */
+#if defined __CYGWIN__
+  /* The Cygwin getprogname() function strips the ".exe" suffix. */
+  assert (STREQ (p, "test-getprogname"));
+#else
+  assert (STREQ (p, "test-getprogname" EXEEXT));
+#endif
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-gettimeofday.c b/src/grep/gnulib-tests/test-gettimeofday.c
new file mode 100644
index 0000000..f9139d0
--- /dev/null
+++ b/src/grep/gnulib-tests/test-gettimeofday.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2005, 2007, 2009-2021 Free Software Foundation, Inc.
+ * Written by Jim Meyering.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/time.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (gettimeofday, int,
+                 (struct timeval *, GETTIMEOFDAY_TIMEZONE *));
+
+#include <time.h>
+
+#include <stdio.h>
+#include <string.h>
+
+int
+main (void)
+{
+  time_t t = 0;
+  struct tm *lt;
+  struct tm saved_lt;
+  struct timeval tv;
+  lt = localtime (&t);
+  saved_lt = *lt;
+  gettimeofday (&tv, NULL);
+  if (memcmp (lt, &saved_lt, sizeof (struct tm)) != 0)
+    {
+      fprintf (stderr, "gettimeofday still clobbers the localtime buffer!\n");
+      return 1;
+    }
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-hard-locale.c b/src/grep/gnulib-tests/test-hard-locale.c
new file mode 100644
index 0000000..ff29b36
--- /dev/null
+++ b/src/grep/gnulib-tests/test-hard-locale.c
@@ -0,0 +1,109 @@
+/* Test of determination whether a locale is different from the "C" locale.
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+#include "hard-locale.h"
+
+#include <locale.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+
+/* True if all locale names are accepted and all locales are trivial.
+   This is the case e.g. on OpenBSD 3.8.  */
+static bool all_trivial;
+
+static int
+test_one (const char *name, int failure_bitmask)
+{
+  if (setlocale (LC_ALL, name) != NULL)
+    {
+      bool expected;
+
+      /* musl libc has special code for the C.UTF-8 locale; other than that,
+         all locale names are accepted and all locales are trivial.
+         OpenBSD returns the locale name that was set, but we don't know how it
+         behaves under the hood.  Likewise for Haiku.  */
+#if defined MUSL_LIBC || defined __OpenBSD__ || defined __HAIKU__
+      expected = true;
+#else
+      expected = !all_trivial;
+#endif
+      if (hard_locale (LC_CTYPE) != expected)
+        {
+          if (expected)
+            fprintf (stderr, "Unexpected: The category LC_CTYPE of the locale '%s' is not equivalent to C or POSIX.\n",
+                     name);
+          else
+            fprintf (stderr, "Unexpected: The category LC_CTYPE of the locale '%s' is equivalent to C or POSIX.\n",
+                     name);
+          return failure_bitmask;
+        }
+
+      /* On NetBSD 7.0, some locales such as de_DE.ISO8859-1 and de_DE.UTF-8
+         have the LC_COLLATE category set to "C".
+         Similarly, on musl libc, with the C.UTF-8 locale.  */
+#if defined __NetBSD__
+      expected = false;
+#elif defined MUSL_LIBC
+      expected = strcmp (name, "C.UTF-8") != 0;
+#elif (defined __OpenBSD__ && HAVE_DUPLOCALE) || defined __HAIKU__ /* OpenBSD >= 6.2, Haiku */
+      expected = true;
+#else
+      expected = !all_trivial;
+#endif
+      if (hard_locale (LC_COLLATE) != expected)
+        {
+          if (expected)
+            fprintf (stderr, "Unexpected: The category LC_COLLATE of the locale '%s' is not equivalent to C or POSIX.\n",
+                     name);
+          else
+            fprintf (stderr, "Unexpected: The category LC_COLLATE of the locale '%s' is equivalent to C or POSIX.\n",
+                     name);
+          return failure_bitmask;
+        }
+    }
+  return 0;
+}
+
+int
+main ()
+{
+  int fail = 0;
+
+  /* The initial locale is the "C" or "POSIX" locale.  */
+  if (hard_locale (LC_CTYPE) || hard_locale (LC_COLLATE))
+    {
+      fprintf (stderr, "The initial locale should not be hard!\n");
+      fail |= 1;
+    }
+
+  all_trivial = (setlocale (LC_ALL, "foobar") != NULL);
+
+  fail |= test_one ("de", 2);
+  fail |= test_one ("de_DE", 4);
+  fail |= test_one ("de_DE.ISO8859-1", 8);
+  fail |= test_one ("de_DE.iso88591", 8);
+  fail |= test_one ("de_DE.UTF-8", 16);
+  fail |= test_one ("de_DE.utf8", 16);
+  fail |= test_one ("german", 32);
+  fail |= test_one ("C.UTF-8", 64);
+
+  return fail;
+}
diff --git a/src/grep/gnulib-tests/test-hash.c b/src/grep/gnulib-tests/test-hash.c
new file mode 100644
index 0000000..4e8c59f
--- /dev/null
+++ b/src/grep/gnulib-tests/test-hash.c
@@ -0,0 +1,263 @@
+/*
+ * Copyright (C) 2009-2021 Free Software Foundation, Inc.
+ * Written by Jim Meyering
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "hash.h"
+#include "hash-pjw.h"
+#include "inttostr.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#define STREQ(a, b) (strcmp (a, b) == 0)
+#define ARRAY_CARDINALITY(Array) (sizeof (Array) / sizeof *(Array))
+
+static bool
+hash_compare_strings (void const *x, void const *y)
+{
+  ASSERT (x != y);
+  return STREQ (x, y) ? true : false;
+}
+
+static void
+hash_freer (void *x)
+{
+  free (x);
+}
+
+static void
+insert_new (Hash_table *ht, const void *ent)
+{
+  void *e = hash_insert (ht, ent);
+  ASSERT (e == ent);
+}
+
+static bool
+walk (void *ent, void *data)
+{
+  char *str = ent;
+  unsigned int *map = data;
+  switch (*str)
+    {
+    case 'a': *map |= 1; return true;
+    case 'b': *map |= 2; return true;
+    case 'c': *map |= 4; return true;
+    }
+  *map |= 8;
+  return false;
+}
+
+static int
+get_seed (char const *str, unsigned int *seed)
+{
+  size_t len = strlen (str);
+  if (len == 0 || strspn (str, "0123456789") != len || 10 < len)
+    return 1;
+
+  *seed = atoi (str);
+  return 0;
+}
+
+int
+main (int argc, char **argv)
+{
+  unsigned int i;
+  unsigned int k;
+  unsigned int table_size[] = {1, 2, 3, 4, 5, 23, 53};
+  Hash_table *ht;
+  Hash_tuning tuning;
+
+  hash_reset_tuning (&tuning);
+  tuning.shrink_threshold = 0.3;
+  tuning.shrink_factor = 0.707;
+  tuning.growth_threshold = 1.5;
+  tuning.growth_factor = 2.0;
+  tuning.is_n_buckets = true;
+
+  if (1 < argc)
+    {
+      unsigned int seed;
+      if (get_seed (argv[1], &seed) != 0)
+        {
+          fprintf (stderr, "invalid seed: %s\n", argv[1]);
+          exit (EXIT_FAILURE);
+        }
+
+      srand (seed);
+    }
+
+  for (i = 0; i < ARRAY_CARDINALITY (table_size); i++)
+    {
+      size_t sz = table_size[i];
+      ht = hash_initialize (sz, NULL, hash_pjw, hash_compare_strings, NULL);
+      ASSERT (ht);
+      insert_new (ht, "a");
+      {
+        char *str1 = strdup ("a");
+        char *str2;
+        ASSERT (str1);
+        str2 = hash_insert (ht, str1);
+        ASSERT (str1 != str2);
+        ASSERT (STREQ (str1, str2));
+        free (str1);
+      }
+      insert_new (ht, "b");
+      insert_new (ht, "c");
+      i = 0;
+      ASSERT (hash_do_for_each (ht, walk, &i) == 3);
+      ASSERT (i == 7);
+      {
+        void *buf[5] = { NULL };
+        ASSERT (hash_get_entries (ht, NULL, 0) == 0);
+        ASSERT (hash_get_entries (ht, buf, 5) == 3);
+        ASSERT (STREQ (buf[0], "a") || STREQ (buf[0], "b") || STREQ (buf[0], "c"));
+      }
+      ASSERT (hash_remove (ht, "a"));
+      ASSERT (hash_remove (ht, "a") == NULL);
+      ASSERT (hash_remove (ht, "b"));
+      ASSERT (hash_remove (ht, "c"));
+
+      ASSERT (hash_rehash (ht, 47));
+      ASSERT (hash_rehash (ht, 467));
+
+      /* Free an empty table. */
+      hash_clear (ht);
+      hash_free (ht);
+
+      ht = hash_initialize (sz, NULL, hash_pjw, hash_compare_strings, NULL);
+      ASSERT (ht);
+
+      insert_new (ht, "z");
+      insert_new (ht, "y");
+      insert_new (ht, "x");
+      insert_new (ht, "w");
+      insert_new (ht, "v");
+      insert_new (ht, "u");
+
+      hash_clear (ht);
+      ASSERT (hash_get_n_entries (ht) == 0);
+      hash_free (ht);
+
+      /* Test pointer hashing.  */
+      ht = hash_initialize (sz, NULL, NULL, NULL, NULL);
+      ASSERT (ht);
+      {
+        char *str = strdup ("a");
+        ASSERT (str);
+        insert_new (ht, "a");
+        insert_new (ht, str);
+        ASSERT (hash_lookup (ht, str) == str);
+        free (str);
+      }
+      hash_free (ht);
+    }
+
+  hash_reset_tuning (&tuning);
+  tuning.shrink_threshold = 0.3;
+  tuning.shrink_factor = 0.707;
+  tuning.growth_threshold = 1.5;
+  tuning.growth_factor = 2.0;
+  tuning.is_n_buckets = true;
+  /* Invalid tuning.  */
+  ht = hash_initialize (4651, &tuning, hash_pjw, hash_compare_strings,
+                        hash_freer);
+  ASSERT (!ht);
+
+  /* Alternate tuning.  */
+  tuning.growth_threshold = 0.89;
+
+  /* Run with default tuning, then with custom tuning settings.  */
+  for (k = 0; k < 2; k++)
+    {
+      Hash_tuning const *tune = (k == 0 ? NULL : &tuning);
+      /* Now, each entry is malloc'd.  */
+      ht = hash_initialize (4651, tune, hash_pjw,
+                            hash_compare_strings, hash_freer);
+      ASSERT (ht);
+      for (i = 0; i < 10000; i++)
+        {
+          unsigned int op = rand () % 10;
+          switch (op)
+            {
+            case 0:
+            case 1:
+            case 2:
+            case 3:
+            case 4:
+            case 5:
+              {
+                char buf[50];
+                char const *p = uinttostr (i, buf);
+                char *p_dup = strdup (p);
+                ASSERT (p_dup);
+                insert_new (ht, p_dup);
+              }
+              break;
+
+            case 6:
+              {
+                size_t n = hash_get_n_entries (ht);
+                ASSERT (hash_rehash (ht, n + rand () % 20));
+              }
+              break;
+
+            case 7:
+              {
+                size_t n = hash_get_n_entries (ht);
+                size_t delta = rand () % 20;
+                if (delta < n)
+                  ASSERT (hash_rehash (ht, n - delta));
+              }
+              break;
+
+            case 8:
+            case 9:
+              {
+                /* Delete a random entry.  */
+                size_t n = hash_get_n_entries (ht);
+                if (n)
+                  {
+                    size_t kk = rand () % n;
+                    void const *p;
+                    void *v;
+                    for (p = hash_get_first (ht); kk;
+                         --kk, p = hash_get_next (ht, p))
+                      {
+                        /* empty */
+                      }
+                    ASSERT (p);
+                    v = hash_remove (ht, p);
+                    ASSERT (v);
+                    free (v);
+                  }
+                break;
+              }
+            }
+          ASSERT (hash_table_ok (ht));
+        }
+
+      hash_free (ht);
+    }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-i-ring.c b/src/grep/gnulib-tests/test-i-ring.c
new file mode 100644
index 0000000..9a73541
--- /dev/null
+++ b/src/grep/gnulib-tests/test-i-ring.c
@@ -0,0 +1,63 @@
+/* Test the simple ring buffer.
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering */
+
+#include <config.h>
+
+#include "i-ring.h"
+
+#include "macros.h"
+
+int
+main (void)
+{
+  int o;
+  I_ring ir;
+  i_ring_init (&ir, -1);
+  o = i_ring_push (&ir, 1);
+  ASSERT (o == -1);
+  o = i_ring_push (&ir, 2);
+  ASSERT (o == -1);
+  o = i_ring_push (&ir, 3);
+  ASSERT (o == -1);
+  o = i_ring_push (&ir, 4);
+  ASSERT (o == -1);
+  o = i_ring_push (&ir, 5);
+  ASSERT (o == 1);
+  o = i_ring_push (&ir, 6);
+  ASSERT (o == 2);
+  o = i_ring_push (&ir, 7);
+  ASSERT (o == 3);
+
+  o = i_ring_pop (&ir);
+  ASSERT (o == 7);
+  o = i_ring_pop (&ir);
+  ASSERT (o == 6);
+  o = i_ring_pop (&ir);
+  ASSERT (o == 5);
+  o = i_ring_pop (&ir);
+  ASSERT (o == 4);
+  ASSERT (i_ring_empty (&ir));
+
+  o = i_ring_push (&ir, 8);
+  ASSERT (o == -1);
+  o = i_ring_pop (&ir);
+  ASSERT (o == 8);
+  ASSERT (i_ring_empty (&ir));
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-iconv-h.c b/src/grep/gnulib-tests/test-iconv-h.c
new file mode 100644
index 0000000..bba7fe3
--- /dev/null
+++ b/src/grep/gnulib-tests/test-iconv-h.c
@@ -0,0 +1,27 @@
+/* Test of <iconv.h> substitute.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#if HAVE_ICONV
+# include <iconv.h>
+#endif
+
+int
+main ()
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-iconv.c b/src/grep/gnulib-tests/test-iconv.c
new file mode 100644
index 0000000..f35113f
--- /dev/null
+++ b/src/grep/gnulib-tests/test-iconv.c
@@ -0,0 +1,159 @@
+/* Test of character set conversion.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#if HAVE_ICONV
+# include <iconv.h>
+
+# ifndef ICONV_CONST
+#  define ICONV_CONST /* empty */
+# endif
+
+#include "signature.h"
+SIGNATURE_CHECK (iconv, size_t, (iconv_t, ICONV_CONST char **, size_t *,
+                                 char **, size_t *));
+SIGNATURE_CHECK (iconv_close, int, (iconv_t x));
+SIGNATURE_CHECK (iconv_open, iconv_t, (char const *, char const *));
+
+#endif
+
+#include <errno.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main ()
+{
+#if HAVE_ICONV
+  /* Assume that iconv() supports at least the encodings ASCII, ISO-8859-1,
+     and UTF-8.  */
+  iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1");
+  iconv_t cd_utf8_to_88591 = iconv_open ("ISO-8859-1", "UTF-8");
+
+#if defined __MVS__ && defined __IBMC__
+  /* String literals below are in ASCII, not EBCDIC.  */
+# pragma convert("ISO8859-1")
+# define CONVERT_ENABLED
+#endif
+
+  ASSERT (cd_88591_to_utf8 != (iconv_t)(-1));
+  ASSERT (cd_utf8_to_88591 != (iconv_t)(-1));
+
+  /* Test conversion from ISO-8859-1 to UTF-8 with no errors.  */
+  {
+    static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
+    static const char expected[] = "\303\204rger mit b\303\266sen B\303\274bchen ohne Augenma\303\237";
+    char buf[50];
+    const char *inptr = input;
+    size_t inbytesleft = strlen (input);
+    char *outptr = buf;
+    size_t outbytesleft = sizeof (buf);
+    size_t res = iconv (cd_88591_to_utf8,
+                        (ICONV_CONST char **) &inptr, &inbytesleft,
+                        &outptr, &outbytesleft);
+    ASSERT (res == 0 && inbytesleft == 0);
+    ASSERT (outptr == buf + strlen (expected));
+    ASSERT (memcmp (buf, expected, strlen (expected)) == 0);
+  }
+
+  /* Test conversion from ISO-8859-1 to UTF-8 with E2BIG.  */
+  {
+    static const char input[] = "\304";
+    static char buf[2] = { (char)0xDE, (char)0xAD };
+    const char *inptr = input;
+    size_t inbytesleft = 1;
+    char *outptr = buf;
+    size_t outbytesleft = 1;
+    size_t res = iconv (cd_88591_to_utf8,
+                        (ICONV_CONST char **) &inptr, &inbytesleft,
+                        &outptr, &outbytesleft);
+    ASSERT (res == (size_t)(-1) && errno == E2BIG);
+    ASSERT (inbytesleft == 1);
+    ASSERT (outbytesleft == 1);
+    ASSERT ((unsigned char) buf[1] == 0xAD);
+    ASSERT ((unsigned char) buf[0] == 0xDE);
+  }
+
+  /* Test conversion from UTF-8 to ISO-8859-1 with no errors.  */
+  {
+    static const char input[] = "\303\204rger mit b\303\266sen B\303\274bchen ohne Augenma\303\237";
+    static const char expected[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
+    char buf[50];
+    const char *inptr = input;
+    size_t inbytesleft = strlen (input);
+    char *outptr = buf;
+    size_t outbytesleft = sizeof (buf);
+    size_t res = iconv (cd_utf8_to_88591,
+                        (ICONV_CONST char **) &inptr, &inbytesleft,
+                        &outptr, &outbytesleft);
+    ASSERT (res == 0 && inbytesleft == 0);
+    ASSERT (outptr == buf + strlen (expected));
+    ASSERT (memcmp (buf, expected, strlen (expected)) == 0);
+  }
+
+  /* Test conversion from UTF-8 to ISO-8859-1 with EILSEQ.  */
+  {
+    static const char input[] = "\342\202\254"; /* EURO SIGN */
+    char buf[10];
+    const char *inptr = input;
+    size_t inbytesleft = strlen (input);
+    char *outptr = buf;
+    size_t outbytesleft = sizeof (buf);
+    size_t res = iconv (cd_utf8_to_88591,
+                        (ICONV_CONST char **) &inptr, &inbytesleft,
+                        &outptr, &outbytesleft);
+    if (res == (size_t)(-1))
+      {
+        ASSERT (errno == EILSEQ);
+        ASSERT (inbytesleft == strlen (input) && outptr == buf);
+      }
+    else
+      {
+        ASSERT (res == 1);
+        ASSERT (inbytesleft == 0);
+      }
+  }
+
+  /* Test conversion from UTF-8 to ISO-8859-1 with EINVAL.  */
+  {
+    static const char input[] = "\342";
+    char buf[10];
+    const char *inptr = input;
+    size_t inbytesleft = 1;
+    char *outptr = buf;
+    size_t outbytesleft = sizeof (buf);
+    size_t res = iconv (cd_utf8_to_88591,
+                        (ICONV_CONST char **) &inptr, &inbytesleft,
+                        &outptr, &outbytesleft);
+    ASSERT (res == (size_t)(-1) && errno == EINVAL);
+    ASSERT (inbytesleft == 1 && outptr == buf);
+  }
+
+  iconv_close (cd_88591_to_utf8);
+  iconv_close (cd_utf8_to_88591);
+
+#ifdef CONVERT_ENABLED
+# pragma convert(pop)
+#endif
+
+#endif /* HAVE_ICONV */
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-ignore-value.c b/src/grep/gnulib-tests/test-ignore-value.c
new file mode 100644
index 0000000..6191d7d
--- /dev/null
+++ b/src/grep/gnulib-tests/test-ignore-value.c
@@ -0,0 +1,78 @@
+/* Test the "ignore-value" module.
+
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake.  */
+
+#include <config.h>
+
+#include "ignore-value.h"
+
+#include <stdio.h>
+
+#include "attribute.h"
+
+struct s { int i; };
+NODISCARD static char doChar (void);
+NODISCARD static int doInt (void);
+NODISCARD static off_t doOff (void);
+NODISCARD static void *doPtr (void);
+NODISCARD static struct s doStruct (void);
+
+static char
+doChar (void)
+{
+  return 0;
+}
+
+static int
+doInt (void)
+{
+  return 0;
+}
+
+static off_t
+doOff (void)
+{
+  return 0;
+}
+
+static void *
+doPtr (void)
+{
+  return NULL;
+}
+
+static struct s
+doStruct (void)
+{
+  static struct s s1;
+  return s1;
+}
+
+int
+main (void)
+{
+  /* If this test can compile with -Werror and the same warnings as
+     the rest of the project, then we are properly silencing warnings
+     about ignored return values.  */
+  ignore_value (doChar ());
+  ignore_value (doInt ());
+  ignore_value (doOff ());
+  ignore_value (doPtr ());
+  ignore_value (doStruct ());
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-inet_pton.c b/src/grep/gnulib-tests/test-inet_pton.c
new file mode 100644
index 0000000..9d2e50f
--- /dev/null
+++ b/src/grep/gnulib-tests/test-inet_pton.c
@@ -0,0 +1,58 @@
+/* Test of inet_pton function.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+#include <config.h>
+
+#include <arpa/inet.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (inet_pton, int, (int, const char *, void *));
+
+#include <netinet/in.h>
+#include <sys/socket.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+#if defined AF_INET /* HAVE_IPV4 */
+  {
+    /* This machine was for a long time known as
+       ma2s2.mathematik.uni-karlsruhe.de.  */
+    const char printable[] = "129.13.115.2";
+    struct in_addr internal;
+    int ret;
+
+    ret = inet_pton (AF_INET, printable, &internal);
+    ASSERT (ret == 1);
+    /* Verify that internal is filled in network byte order.  */
+    ASSERT (((unsigned char *) &internal)[0] == 0x81);
+    ASSERT (((unsigned char *) &internal)[1] == 0x0D);
+    ASSERT (((unsigned char *) &internal)[2] == 0x73);
+    ASSERT (((unsigned char *) &internal)[3] == 0x02);
+# ifdef WORDS_BIGENDIAN
+    ASSERT (internal.s_addr == 0x810D7302);
+# else
+    ASSERT (internal.s_addr == 0x02730D81);
+# endif
+  }
+#endif
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-init.sh b/src/grep/gnulib-tests/test-init.sh
new file mode 100755
index 0000000..7b8c451
--- /dev/null
+++ b/src/grep/gnulib-tests/test-init.sh
@@ -0,0 +1,74 @@
+#!/bin/sh
+# Unit tests for init.sh
+# Copyright (C) 2011-2021 Free Software Foundation, Inc.
+# This file is part of the GNUlib Library.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+: ${srcdir=.}
+. "$srcdir/init.sh"; path_prepend_ .
+
+fail=0
+
+test_compare()
+{
+  touch empty || fail=1
+  echo xyz > in || fail=1
+
+  compare /dev/null /dev/null >out 2>err || fail=1
+  test -s out && fail_ "out not empty: $(cat out)"
+  # "err" should be empty, too, but has "set -x" output when VERBOSE=yes
+  case $- in *x*) ;; *) test -s err && fail_ "err not empty: $(cat err)";; esac
+
+  compare /dev/null empty >out 2>err || fail=1
+  test -s out && fail_ "out not empty: $(cat out)"
+  case $- in *x*) ;; *) test -s err && fail_ "err not empty: $(cat err)";; esac
+
+  compare in in >out 2>err || fail=1
+  test -s out && fail_ "out not empty: $(cat out)"
+  case $- in *x*) ;; *) test -s err && fail_ "err not empty: $(cat err)";; esac
+
+  compare /dev/null in >out 2>err && fail=1
+  cat <<\EOF > exp
+diff -u /dev/null in
+--- /dev/null	1970-01-01
++++ in	1970-01-01
++xyz
+EOF
+  compare exp out || fail=1
+  case $- in *x*) ;; *) test -s err && fail_ "err not empty: $(cat err)";; esac
+
+  compare empty in >out 2>err && fail=1
+  # Compare against expected output only if compare is using diff -u.
+  if grep @ out >/dev/null; then
+    # Remove the TAB-date suffix on each --- and +++ line,
+    # for both the expected and the actual output files.
+    # Also remove the @@ line, since Solaris 5.10 and GNU diff formats differ:
+    # -@@ -0,0 +1 @@
+    # +@@ -1,0 +1,1 @@
+    # Also, remove space after leading '+', since AIX 7.1 diff outputs a space.
+    sed 's/	.*//;/^@@/d;s/^+ /+/' out > k && mv k out
+    cat <<\EOF > exp
+--- empty
++++ in
++xyz
+EOF
+    compare exp out || fail=1
+  fi
+  case $- in *x*) ;; *) test -s err && fail_ "err not empty: $(cat err)";; esac
+}
+
+test_compare
+
+Exit $fail
diff --git a/src/grep/gnulib-tests/test-intprops.c b/src/grep/gnulib-tests/test-intprops.c
new file mode 100644
index 0000000..fff4218
--- /dev/null
+++ b/src/grep/gnulib-tests/test-intprops.c
@@ -0,0 +1,441 @@
+/* Test intprops.h.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+/* Tell gcc not to warn about the long expressions that the overflow
+   macros expand to, or about the (X < 0) expressions.  */
+#if 4 < __GNUC__ + (3 <= __GNUC_MINOR__)
+# pragma GCC diagnostic ignored "-Woverlength-strings"
+# pragma GCC diagnostic ignored "-Wtype-limits"
+
+/* Work around a bug in GCC 6.1 and earlier; see:
+   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68971  */
+# pragma GCC diagnostic ignored "-Woverflow"
+
+#endif
+
+#include <config.h>
+
+#include "intprops.h"
+#include "verify.h"
+
+#include <stdbool.h>
+#include <inttypes.h>
+#include <limits.h>
+
+#include "macros.h"
+
+/* Compile-time verification of expression X.
+   In this file, we need it as a statement, rather than as a declaration.  */
+#define verify_stmt(x) do { verify (x); } while (0)
+
+/* VERIFY (X) uses a static assertion for compilers that are known to work,
+   and falls back on a dynamic assertion for other compilers.
+   These tests should be checkable via 'verify' rather than 'ASSERT', but
+   using 'verify' would run into a bug with HP-UX 11.23 cc; see
+   <https://lists.gnu.org/r/bug-gnulib/2011-05/msg00401.html>.  */
+#if __GNUC__ || __clang__ || __SUNPRO_C
+# define VERIFY(x) verify_stmt (x)
+#else
+# define VERIFY(x) ASSERT (x)
+#endif
+
+#define DONTCARE __LINE__
+
+int int_minus_2 = -2;
+int int_1 = 1;
+
+int
+main (void)
+{
+  /* Use VERIFY for tests that must be integer constant expressions,
+     ASSERT otherwise.  */
+
+  /* TYPE_IS_INTEGER.  */
+  ASSERT (TYPE_IS_INTEGER (bool));
+  ASSERT (TYPE_IS_INTEGER (char));
+  ASSERT (TYPE_IS_INTEGER (signed char));
+  ASSERT (TYPE_IS_INTEGER (unsigned char));
+  ASSERT (TYPE_IS_INTEGER (short int));
+  ASSERT (TYPE_IS_INTEGER (unsigned short int));
+  ASSERT (TYPE_IS_INTEGER (int));
+  ASSERT (TYPE_IS_INTEGER (unsigned int));
+  ASSERT (TYPE_IS_INTEGER (long int));
+  ASSERT (TYPE_IS_INTEGER (unsigned long int));
+  ASSERT (TYPE_IS_INTEGER (intmax_t));
+  ASSERT (TYPE_IS_INTEGER (uintmax_t));
+  ASSERT (! TYPE_IS_INTEGER (float));
+  ASSERT (! TYPE_IS_INTEGER (double));
+  ASSERT (! TYPE_IS_INTEGER (long double));
+
+  /* TYPE_SIGNED.  */
+  /* VERIFY (! TYPE_SIGNED (bool)); // not guaranteed by gnulib substitute */
+  VERIFY (TYPE_SIGNED (signed char));
+  VERIFY (! TYPE_SIGNED (unsigned char));
+  VERIFY (TYPE_SIGNED (short int));
+  VERIFY (! TYPE_SIGNED (unsigned short int));
+  VERIFY (TYPE_SIGNED (int));
+  VERIFY (! TYPE_SIGNED (unsigned int));
+  VERIFY (TYPE_SIGNED (long int));
+  VERIFY (! TYPE_SIGNED (unsigned long int));
+  VERIFY (TYPE_SIGNED (intmax_t));
+  VERIFY (! TYPE_SIGNED (uintmax_t));
+  ASSERT (TYPE_SIGNED (float));
+  ASSERT (TYPE_SIGNED (double));
+  ASSERT (TYPE_SIGNED (long double));
+
+  /* Integer representation.  Check that it is two's complement.  */
+  VERIFY (INT_MIN + INT_MAX < 0);
+
+  /* TYPE_MINIMUM, TYPE_MAXIMUM.  */
+  VERIFY (TYPE_MINIMUM (char) == CHAR_MIN);
+  VERIFY (TYPE_MAXIMUM (char) == CHAR_MAX);
+  VERIFY (TYPE_MINIMUM (unsigned char) == 0);
+  VERIFY (TYPE_MAXIMUM (unsigned char) == UCHAR_MAX);
+  VERIFY (TYPE_MINIMUM (signed char) == SCHAR_MIN);
+  VERIFY (TYPE_MAXIMUM (signed char) == SCHAR_MAX);
+  VERIFY (TYPE_MINIMUM (short int) == SHRT_MIN);
+  VERIFY (TYPE_MAXIMUM (short int) == SHRT_MAX);
+  VERIFY (TYPE_MINIMUM (unsigned short int) == 0);
+  VERIFY (TYPE_MAXIMUM (unsigned short int) == USHRT_MAX);
+  VERIFY (TYPE_MINIMUM (int) == INT_MIN);
+  VERIFY (TYPE_MAXIMUM (int) == INT_MAX);
+  VERIFY (TYPE_MINIMUM (unsigned int) == 0);
+  VERIFY (TYPE_MAXIMUM (unsigned int) == UINT_MAX);
+  VERIFY (TYPE_MINIMUM (long int) == LONG_MIN);
+  VERIFY (TYPE_MAXIMUM (long int) == LONG_MAX);
+  VERIFY (TYPE_MINIMUM (unsigned long int) == 0);
+  VERIFY (TYPE_MAXIMUM (unsigned long int) == ULONG_MAX);
+  #ifdef LLONG_MAX
+   verify_stmt (TYPE_MINIMUM (long long int) == LLONG_MIN);
+   verify_stmt (TYPE_MAXIMUM (long long int) == LLONG_MAX);
+   verify_stmt (TYPE_MINIMUM (unsigned long long int) == 0);
+   verify_stmt (TYPE_MAXIMUM (unsigned long long int) == ULLONG_MAX);
+  #endif
+  VERIFY (TYPE_MINIMUM (intmax_t) == INTMAX_MIN);
+  VERIFY (TYPE_MAXIMUM (intmax_t) == INTMAX_MAX);
+  VERIFY (TYPE_MINIMUM (uintmax_t) == 0);
+  VERIFY (TYPE_MAXIMUM (uintmax_t) == UINTMAX_MAX);
+
+  /* TYPE_WIDTH.  */
+  #ifdef CHAR_WIDTH
+   verify_stmt (TYPE_WIDTH (char) == CHAR_WIDTH);
+   verify_stmt (TYPE_WIDTH (signed char) == SCHAR_WIDTH);
+   verify_stmt (TYPE_WIDTH (unsigned char) == UCHAR_WIDTH);
+   verify_stmt (TYPE_WIDTH (short int) == SHRT_WIDTH);
+   verify_stmt (TYPE_WIDTH (unsigned short int) == USHRT_WIDTH);
+   verify_stmt (TYPE_WIDTH (int) == INT_WIDTH);
+   verify_stmt (TYPE_WIDTH (unsigned int) == UINT_WIDTH);
+   verify_stmt (TYPE_WIDTH (long int) == LONG_WIDTH);
+   verify_stmt (TYPE_WIDTH (unsigned long int) == ULONG_WIDTH);
+   #ifdef LLONG_WIDTH
+    verify_stmt (TYPE_WIDTH (long long int) == LLONG_WIDTH);
+    verify_stmt (TYPE_WIDTH (unsigned long long int) == ULLONG_WIDTH);
+   #endif
+  #endif
+
+  /* INT_BITS_STRLEN_BOUND.  */
+  VERIFY (INT_BITS_STRLEN_BOUND (1) == 1);
+  VERIFY (INT_BITS_STRLEN_BOUND (2620) == 789);
+
+  /* INT_STRLEN_BOUND, INT_BUFSIZE_BOUND.  */
+  #ifdef INT32_MAX /* POSIX guarantees int32_t; this ports to non-POSIX.  */
+  VERIFY (INT_STRLEN_BOUND (int32_t) == sizeof ("-2147483648") - 1);
+  VERIFY (INT_BUFSIZE_BOUND (int32_t) == sizeof ("-2147483648"));
+  #endif
+  #ifdef INT64_MAX
+  VERIFY (INT_STRLEN_BOUND (int64_t) == sizeof ("-9223372036854775808") - 1);
+  VERIFY (INT_BUFSIZE_BOUND (int64_t) == sizeof ("-9223372036854775808"));
+  #endif
+
+  /* All the INT_<op>_RANGE_OVERFLOW tests are equally valid as
+     INT_<op>_OVERFLOW tests, so define macros to do both.  OP is the
+     operation, OPNAME its symbolic name, A and B its operands, T the
+     result type, V the overflow flag, and VRES the result if V and if
+     two's complement.  CHECK_BINOP is for most binary operatinos,
+     CHECK_SBINOP for binary +, -, * when the result type is signed,
+     and CHECK_UNOP for unary operations.  */
+  #define CHECK_BINOP(op, opname, a, b, t, v, vres)                       \
+    VERIFY (INT_##opname##_RANGE_OVERFLOW (a, b, TYPE_MINIMUM (t),        \
+                                           TYPE_MAXIMUM (t))              \
+            == (v));                                                      \
+    VERIFY (INT_##opname##_OVERFLOW (a, b) == (v))
+  #define CHECK_SBINOP(op, opname, a, b, t, v, vres)                      \
+    CHECK_BINOP(op, opname, a, b, t, v, vres);                            \
+    {                                                                     \
+      t result;                                                           \
+      ASSERT (INT_##opname##_WRAPV (a, b, &result) == (v));               \
+      ASSERT (result == ((v) ? (vres) : ((a) op (b))));                   \
+    }
+  #define CHECK_UNOP(op, opname, a, t, v)                                 \
+    VERIFY (INT_##opname##_RANGE_OVERFLOW (a, TYPE_MINIMUM (t),           \
+                                           TYPE_MAXIMUM (t))              \
+            == (v));                                                      \
+    VERIFY (INT_##opname##_OVERFLOW (a) == (v))
+
+  /* INT_<op>_RANGE_OVERFLOW, INT_<op>_OVERFLOW.  */
+  VERIFY (INT_ADD_RANGE_OVERFLOW (INT_MAX, 1, INT_MIN, INT_MAX));
+  VERIFY (INT_ADD_OVERFLOW (INT_MAX, 1));
+
+  CHECK_SBINOP (+, ADD, INT_MAX, 1, int, true, INT_MIN);
+  CHECK_SBINOP (+, ADD, INT_MAX, -1, int, false, INT_MAX - 1);
+  CHECK_SBINOP (+, ADD, INT_MIN, 1, int, false, INT_MIN + 1);
+  CHECK_SBINOP (+, ADD, INT_MIN, -1, int, true, INT_MAX);
+  CHECK_BINOP (+, ADD, UINT_MAX, 1u, unsigned int, true, 0u);
+  CHECK_BINOP (+, ADD, 0u, 1u, unsigned int, false, 1u);
+
+  CHECK_SBINOP (-, SUBTRACT, INT_MAX, 1, int, false, INT_MAX - 1);
+  CHECK_SBINOP (-, SUBTRACT, INT_MAX, -1, int, true, INT_MIN);
+  CHECK_SBINOP (-, SUBTRACT, INT_MIN, 1, int, true, INT_MAX);
+  CHECK_SBINOP (-, SUBTRACT, INT_MIN, -1, int, false, INT_MIN - -1);
+  CHECK_BINOP (-, SUBTRACT, UINT_MAX, 1u, unsigned int, false, UINT_MAX - 1u);
+  CHECK_BINOP (-, SUBTRACT, 0u, 1u, unsigned int, true, 0u - 1u);
+
+  CHECK_UNOP (-, NEGATE, INT_MIN, int, true);
+  CHECK_UNOP (-, NEGATE, 0, int, false);
+  CHECK_UNOP (-, NEGATE, INT_MAX, int, false);
+  CHECK_UNOP (-, NEGATE, 0u, unsigned int, false);
+  CHECK_UNOP (-, NEGATE, 1u, unsigned int, true);
+  CHECK_UNOP (-, NEGATE, UINT_MAX, unsigned int, true);
+
+  CHECK_SBINOP (*, MULTIPLY, INT_MAX, INT_MAX, int, true, 1);
+  CHECK_SBINOP (*, MULTIPLY, INT_MAX, INT_MIN, int, true, INT_MIN);
+  CHECK_SBINOP (*, MULTIPLY, INT_MIN, INT_MAX, int, true, INT_MIN);
+  CHECK_SBINOP (*, MULTIPLY, INT_MIN, INT_MIN, int, true, 0);
+  CHECK_SBINOP (*, MULTIPLY, -1, INT_MIN, int,
+                INT_NEGATE_OVERFLOW (INT_MIN), INT_MIN);
+#if !defined __HP_cc
+  CHECK_SBINOP (*, MULTIPLY, LONG_MIN / INT_MAX, (long int) INT_MAX,
+                long int, false, LONG_MIN - LONG_MIN % INT_MAX);
+#endif
+
+  CHECK_BINOP (/, DIVIDE, INT_MIN, -1, int,
+               INT_NEGATE_OVERFLOW (INT_MIN), INT_MIN);
+  CHECK_BINOP (/, DIVIDE, INT_MAX, 1, int, false, INT_MAX);
+  CHECK_BINOP (/, DIVIDE, (unsigned int) INT_MIN, -1u, unsigned int,
+               false, INT_MIN / -1u);
+
+  CHECK_BINOP (%, REMAINDER, INT_MIN, -1, int, INT_NEGATE_OVERFLOW (INT_MIN), 0);
+  CHECK_BINOP (%, REMAINDER, INT_MAX, 1, int, false, 0);
+  CHECK_BINOP (%, REMAINDER, (unsigned int) INT_MIN, -1u, unsigned int,
+               false, INT_MIN % -1u);
+
+  CHECK_BINOP (<<, LEFT_SHIFT, UINT_MAX, 1, unsigned int, true, UINT_MAX << 1);
+  CHECK_BINOP (<<, LEFT_SHIFT, UINT_MAX / 2 + 1, 1, unsigned int, true,
+               (UINT_MAX / 2 + 1) << 1);
+  CHECK_BINOP (<<, LEFT_SHIFT, UINT_MAX / 2, 1, unsigned int, false,
+               (UINT_MAX / 2) << 1);
+
+  /* INT_<op>_OVERFLOW and INT_<op>_WRAPV with mixed types.  */
+  #define CHECK_SUM(a, b, t, v, vres)                                     \
+    CHECK_SUM1 (a, b, t, v, vres);                                        \
+    CHECK_SUM1 (b, a, t, v, vres)
+  #define CHECK_SUM_WRAPV(a, b, t, v, vres, okres)                        \
+    CHECK_SUM_WRAPV1 (a, b, t, v, vres, okres);                           \
+    CHECK_SUM_WRAPV1 (b, a, t, v, vres, okres)
+  #define CHECK_SUM1(a, b, t, v, vres)                                    \
+    VERIFY (INT_ADD_OVERFLOW (a, b) == (v));                              \
+    CHECK_SUM_WRAPV1 (a, b, t, v, vres, (a) + (b))
+  #define CHECK_SUM_WRAPV1(a, b, t, v, vres, okres)                       \
+    {                                                                     \
+      t result;                                                           \
+      ASSERT (INT_ADD_WRAPV (a, b, &result) == (v));                      \
+      ASSERT (result == ((v) ? (vres) : (okres)));                        \
+    }
+  CHECK_SUM (-1, LONG_MIN, long int, true, LONG_MAX);
+  CHECK_SUM (-1, UINT_MAX, unsigned int, false, DONTCARE);
+  CHECK_SUM (-1L, INT_MIN, long int, INT_MIN == LONG_MIN,
+              INT_MIN == LONG_MIN ? INT_MAX : DONTCARE);
+  CHECK_SUM (0u, -1, unsigned int, true, 0u + -1);
+  CHECK_SUM (0u, 0, unsigned int, false, DONTCARE);
+  CHECK_SUM (0u, 1, unsigned int, false, DONTCARE);
+  CHECK_SUM (1, LONG_MAX, long int, true, LONG_MIN);
+  CHECK_SUM (1, UINT_MAX, unsigned int, true, 0u);
+  CHECK_SUM (1L, INT_MAX, long int, INT_MAX == LONG_MAX,
+              INT_MAX == LONG_MAX ? INT_MIN : DONTCARE);
+  CHECK_SUM (1u, INT_MAX, unsigned int, INT_MAX == UINT_MAX, 1u + INT_MAX);
+  CHECK_SUM (1u, INT_MIN, unsigned int, true, 1u + INT_MIN);
+  CHECK_SUM_WRAPV (-1, 1u, int, false, DONTCARE, 0);
+  CHECK_SUM_WRAPV (-1, 1ul, int, false, DONTCARE, 0);
+  CHECK_SUM_WRAPV (-1l, 1u, int, false, DONTCARE, 0);
+  CHECK_SUM_WRAPV (-100, 1000u, int, false, DONTCARE, 900);
+  CHECK_SUM_WRAPV (INT_MIN, UINT_MAX, int, false, DONTCARE, INT_MAX);
+  CHECK_SUM_WRAPV (1u, INT_MAX, int, true, INT_MIN, DONTCARE);
+  CHECK_SUM_WRAPV (INT_MAX, 1, long int, LONG_MAX <= INT_MAX, INT_MIN,
+                   INT_MAX + 1L);
+  CHECK_SUM_WRAPV (UINT_MAX, 1, long int, LONG_MAX <= UINT_MAX, 0,
+                   UINT_MAX + 1L);
+  CHECK_SUM_WRAPV (INT_MAX, 1, unsigned long int, ULONG_MAX <= INT_MAX, 0,
+                   INT_MAX + 1uL);
+  CHECK_SUM_WRAPV (UINT_MAX, 1, unsigned long int, ULONG_MAX <= UINT_MAX, 0,
+                   UINT_MAX + 1uL);
+
+  {
+    long int result;
+    ASSERT (INT_ADD_WRAPV (1, INT_MAX, &result) == (INT_MAX == LONG_MAX));
+    ASSERT (INT_ADD_WRAPV (-1, INT_MIN, &result) == (INT_MIN == LONG_MIN));
+  }
+
+  #define CHECK_DIFFERENCE(a, b, t, v, vres)                              \
+    VERIFY (INT_SUBTRACT_OVERFLOW (a, b) == (v))
+  #define CHECK_SDIFFERENCE(a, b, t, v, vres)                             \
+    CHECK_DIFFERENCE (a, b, t, v, vres);                                  \
+    CHECK_SDIFFERENCE_WRAPV (a, b, t, v, vres)
+  #define CHECK_SDIFFERENCE_WRAPV(a, b, t, v, vres)                       \
+    {                                                                     \
+      t result;                                                           \
+      ASSERT (INT_SUBTRACT_WRAPV (a, b, &result) == (v));                 \
+      ASSERT (result == ((v) ? (vres) : ((a) - (b))));                    \
+    }
+  CHECK_DIFFERENCE (INT_MAX, 1u, unsigned int, UINT_MAX < INT_MAX - 1,
+                    INT_MAX - 1u);
+  CHECK_DIFFERENCE (UINT_MAX, 1, unsigned int, false, UINT_MAX - 1);
+  CHECK_DIFFERENCE (0u, -1, unsigned int, false, 0u - -1);
+  CHECK_DIFFERENCE (UINT_MAX, -1, unsigned int, true, UINT_MAX - -1);
+  CHECK_DIFFERENCE (INT_MIN, 1u, unsigned int, true, INT_MIN - 1u);
+  CHECK_DIFFERENCE (-1, 0u, unsigned int, true, -1 - 0u);
+  CHECK_SDIFFERENCE (-1, INT_MIN, int, false, -1 - INT_MIN);
+  CHECK_SDIFFERENCE (-1, INT_MAX, int, false, -1 - INT_MAX);
+  CHECK_SDIFFERENCE (0, INT_MIN, int, INT_MIN < -INT_MAX, INT_MIN);
+  CHECK_SDIFFERENCE (0, INT_MAX, int, false, 0 - INT_MAX);
+  CHECK_SDIFFERENCE_WRAPV (-1, 1u, int, false, DONTCARE);
+  CHECK_SDIFFERENCE_WRAPV (-1, 1ul, int, false, DONTCARE);
+  CHECK_SDIFFERENCE_WRAPV (-1l, 1u, int, false, DONTCARE);
+  CHECK_SDIFFERENCE_WRAPV (0u, INT_MAX, int, false, DONTCARE);
+  CHECK_SDIFFERENCE_WRAPV (1u, INT_MIN, int, true, 1u - INT_MIN);
+  {
+    long int result;
+    ASSERT (INT_SUBTRACT_WRAPV (INT_MAX, -1, &result) == (INT_MAX == LONG_MAX));
+    ASSERT (INT_SUBTRACT_WRAPV (INT_MIN, 1, &result) == (INT_MAX == LONG_MAX));
+  }
+
+  #define CHECK_PRODUCT(a, b, t, v, vres)                                 \
+    CHECK_PRODUCT1 (a, b, t, v, vres);                                    \
+    CHECK_PRODUCT1 (b, a, t, v, vres)
+  #define CHECK_SPRODUCT(a, b, t, v, vres)                                \
+    CHECK_SPRODUCT1 (a, b, t, v, vres);                                   \
+    CHECK_SPRODUCT1 (b, a, t, v, vres)
+  #define CHECK_SPRODUCT_WRAPV(a, b, t, v, vres)                          \
+    CHECK_SPRODUCT_WRAPV1 (a, b, t, v, vres);                             \
+    CHECK_SPRODUCT_WRAPV1 (b, a, t, v, vres)
+  #define CHECK_PRODUCT1(a, b, t, v, vres)                                \
+    VERIFY (INT_MULTIPLY_OVERFLOW (a, b) == (v))
+  #define CHECK_SPRODUCT1(a, b, t, v, vres)                               \
+    CHECK_PRODUCT1 (a, b, t, v, vres);                                    \
+    CHECK_SPRODUCT_WRAPV1 (a, b, t, v, vres)
+  #define CHECK_SPRODUCT_WRAPV1(a, b, t, v, vres)                         \
+    {                                                                     \
+      t result;                                                           \
+      ASSERT (INT_MULTIPLY_WRAPV (a, b, &result) == (v));                 \
+      ASSERT (result == ((v) ? (vres) : ((a) * (b))));                    \
+    }
+  CHECK_PRODUCT (-1, 1u, unsigned int, true, -1 * 1u);
+  CHECK_SPRODUCT (-1, INT_MIN, int, INT_NEGATE_OVERFLOW (INT_MIN), INT_MIN);
+  CHECK_PRODUCT (-1, UINT_MAX, unsigned int, true, -1 * UINT_MAX);
+  CHECK_SPRODUCT (-32768, LONG_MAX / -32768 - 1, long int, true, LONG_MIN);
+  CHECK_SPRODUCT (-12345, LONG_MAX / -12345, long int, false, DONTCARE);
+  CHECK_SPRODUCT (0, -1, int, false, DONTCARE);
+  CHECK_SPRODUCT (0, 0, int, false, DONTCARE);
+  CHECK_PRODUCT (0, 0u, unsigned int, false, DONTCARE);
+  CHECK_SPRODUCT (0, 1, int, false, DONTCARE);
+  CHECK_SPRODUCT (0, INT_MAX, int, false, DONTCARE);
+  CHECK_SPRODUCT (0, INT_MIN, int, false, DONTCARE);
+  CHECK_PRODUCT (0, UINT_MAX, unsigned int, false, DONTCARE);
+  CHECK_PRODUCT (0u, -1, unsigned int, false, DONTCARE);
+  CHECK_PRODUCT (0u, 0, unsigned int, false, DONTCARE);
+  CHECK_PRODUCT (0u, 0u, unsigned int, false, DONTCARE);
+  CHECK_PRODUCT (0u, 1, unsigned int, false, DONTCARE);
+  CHECK_PRODUCT (0u, INT_MAX, unsigned int, false, DONTCARE);
+  CHECK_PRODUCT (0u, INT_MIN, unsigned int, false, DONTCARE);
+  CHECK_PRODUCT (0u, UINT_MAX, unsigned int, false, DONTCARE);
+  CHECK_SPRODUCT (1, INT_MAX, int, false, DONTCARE);
+  CHECK_SPRODUCT (1, INT_MIN, int, false, DONTCARE);
+  CHECK_PRODUCT (1, UINT_MAX, unsigned int, false, DONTCARE);
+  CHECK_PRODUCT (1u, INT_MIN, unsigned int, true, 1u * INT_MIN);
+  CHECK_PRODUCT (1u, INT_MAX, unsigned int, UINT_MAX < INT_MAX, 1u * INT_MAX);
+  CHECK_PRODUCT (INT_MAX, UINT_MAX, unsigned int, true, INT_MAX * UINT_MAX);
+  CHECK_PRODUCT (INT_MAX, ULONG_MAX, unsigned long int, true,
+                 INT_MAX * ULONG_MAX);
+#if !defined __HP_cc
+  CHECK_SPRODUCT (INT_MIN, LONG_MAX / INT_MIN - 1, long int, true, LONG_MIN);
+  CHECK_SPRODUCT (INT_MIN, LONG_MAX / INT_MIN, long int, false, DONTCARE);
+#endif
+  CHECK_PRODUCT (INT_MIN, UINT_MAX, unsigned int, true, INT_MIN * UINT_MAX);
+  CHECK_PRODUCT (INT_MIN, ULONG_MAX, unsigned long int, true,
+                 INT_MIN * ULONG_MAX);
+  CHECK_SPRODUCT_WRAPV (-1, INT_MAX + 1u, int, false, DONTCARE);
+  CHECK_SPRODUCT_WRAPV (-1, 1u, int, false, DONTCARE);
+  CHECK_SPRODUCT (0, ULONG_MAX, int, false, DONTCARE);
+  CHECK_SPRODUCT (0u, LONG_MIN, int, false, DONTCARE);
+  {
+    long int result;
+    ASSERT (INT_MULTIPLY_WRAPV (INT_MAX, INT_MAX, &result)
+            == (LONG_MAX / INT_MAX < INT_MAX));
+    ASSERT (INT_MULTIPLY_WRAPV (INT_MAX, INT_MAX, &result)
+            || result == INT_MAX * (long int) INT_MAX);
+    ASSERT (INT_MULTIPLY_WRAPV (INT_MIN, INT_MIN, &result)
+            || result == INT_MIN * (long int) INT_MIN);
+  }
+
+# ifdef LLONG_MAX
+  {
+    long long int result;
+    ASSERT (INT_MULTIPLY_WRAPV (LONG_MAX, LONG_MAX, &result)
+            == (LLONG_MAX / LONG_MAX < LONG_MAX));
+    ASSERT (INT_MULTIPLY_WRAPV (LONG_MAX, LONG_MAX, &result)
+            || result == LONG_MAX * (long long int) LONG_MAX);
+    ASSERT (INT_MULTIPLY_WRAPV (LONG_MIN, LONG_MIN, &result)
+            || result == LONG_MIN * (long long int) LONG_MIN);
+  }
+# endif
+
+  /* Check for GCC bug 91450.  */
+  {
+    unsigned long long result;
+    ASSERT (INT_MULTIPLY_WRAPV (int_minus_2, int_1, &result) && result == -2);
+  }
+
+  #define CHECK_QUOTIENT(a, b, v) VERIFY (INT_DIVIDE_OVERFLOW (a, b) == (v))
+
+  CHECK_QUOTIENT (INT_MIN, -1L, INT_MIN == LONG_MIN);
+  CHECK_QUOTIENT (INT_MIN, UINT_MAX, false);
+  CHECK_QUOTIENT (INTMAX_MIN, UINTMAX_MAX, false);
+  CHECK_QUOTIENT (INTMAX_MIN, UINT_MAX, false);
+  CHECK_QUOTIENT (-11, 10u, true);
+  CHECK_QUOTIENT (-10, 10u, true);
+  CHECK_QUOTIENT (-9, 10u, false);
+  CHECK_QUOTIENT (11u, -10, true);
+  CHECK_QUOTIENT (10u, -10, true);
+  CHECK_QUOTIENT (9u, -10, false);
+
+  #define CHECK_REMAINDER(a, b, v) VERIFY (INT_REMAINDER_OVERFLOW (a, b) == (v))
+
+  CHECK_REMAINDER (INT_MIN, -1L, INT_MIN == LONG_MIN);
+  CHECK_REMAINDER (-1, UINT_MAX, true);
+  CHECK_REMAINDER ((intmax_t) -1, UINTMAX_MAX, true);
+  CHECK_REMAINDER (INTMAX_MIN, UINT_MAX,
+                   (INTMAX_MAX < UINT_MAX
+                    && - (unsigned int) INTMAX_MIN % UINT_MAX != 0));
+  CHECK_REMAINDER (INT_MIN, ULONG_MAX, INT_MIN % ULONG_MAX != 1);
+  CHECK_REMAINDER (1u, -1, false);
+  CHECK_REMAINDER (37*39u, -39, false);
+  CHECK_REMAINDER (37*39u + 1, -39, true);
+  CHECK_REMAINDER (37*39u - 1, -39, true);
+  CHECK_REMAINDER (LONG_MAX, -INT_MAX, false);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-inttostr.c b/src/grep/gnulib-tests/test-inttostr.c
new file mode 100644
index 0000000..9422ad4
--- /dev/null
+++ b/src/grep/gnulib-tests/test-inttostr.c
@@ -0,0 +1,94 @@
+/* Test inttostr functions, and incidentally, INT_BUFSIZE_BOUND
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering.  */
+
+#include <config.h>
+
+#include "inttostr.h"
+#include "intprops.h"
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+
+#define STREQ(a, b) (strcmp (a, b) == 0)
+#define IS_TIGHT(T) (_GL_SIGNED_TYPE_OR_EXPR (T) == TYPE_SIGNED (T))
+#define ISDIGIT(c) ((unsigned int) (c) - '0' <= 9)
+
+/* Verify that an inttostr function works as advertised.
+   Convert maximum and minimum (per-type, T) values using both snprintf --
+   with a cast to intmax_t or uintmax_t -- and FN, and compare the
+   resulting strings.  Use malloc for the inttostr buffer, so that if
+   we ever exceed the usually-tight INT_BUFSIZE_BOUND, tools like
+   valgrind will detect the failure. */
+#define CK(T, Fn)                                                       \
+  do                                                                    \
+    {                                                                   \
+      char ref[100];                                                    \
+      char *buf = malloc (INT_BUFSIZE_BOUND (T));                       \
+      char const *p;                                                    \
+      ASSERT (buf);                                                     \
+      *buf = '\0';                                                      \
+      ASSERT                                                            \
+        ((TYPE_SIGNED (T)                                               \
+          ? snprintf (ref, sizeof ref, "%jd", (intmax_t) TYPE_MINIMUM (T)) \
+          : snprintf (ref, sizeof ref, "%ju", (uintmax_t) TYPE_MINIMUM (T))) \
+         < sizeof ref);                                                 \
+      ASSERT (STREQ ((p = Fn (TYPE_MINIMUM (T), buf)), ref));           \
+      /* Ensure that INT_BUFSIZE_BOUND is tight for signed types.  */   \
+      ASSERT (! TYPE_SIGNED (T) || (p == buf && *p == '-'));            \
+      ASSERT                                                            \
+        ((TYPE_SIGNED (T)                                               \
+          ? snprintf (ref, sizeof ref, "%jd", (intmax_t) TYPE_MAXIMUM (T)) \
+          : snprintf (ref, sizeof ref, "%ju", (uintmax_t) TYPE_MAXIMUM (T))) \
+         < sizeof ref);                                                 \
+      ASSERT (STREQ ((p = Fn (TYPE_MAXIMUM (T), buf)), ref));           \
+      /* For unsigned types, the bound is not always tight.  */         \
+      ASSERT (! IS_TIGHT (T) || TYPE_SIGNED (T)                         \
+              || (p == buf && ISDIGIT (*p)));                           \
+      free (buf);                                                       \
+    }                                                                   \
+  while (0)
+
+int
+main (void)
+{
+  size_t b_size = 2;
+  char *b = malloc (b_size);
+  ASSERT (b);
+
+  /* Ideally we would rely on the snprintf-posix module, in which case
+     this guard would not be required, but due to limitations in gnulib's
+     implementation (see modules/snprintf-posix), we cannot.  */
+  if (snprintf (b, b_size, "%ju", (uintmax_t) 3) == 1
+      && b[0] == '3' && b[1] == '\0')
+    {
+      CK (int,          inttostr);
+      CK (unsigned int, uinttostr);
+      CK (off_t,        offtostr);
+      CK (uintmax_t,    umaxtostr);
+      CK (intmax_t,     imaxtostr);
+      free (b);
+      return 0;
+    }
+
+  /* snprintf doesn't accept %ju; skip this test.  */
+  free (b);
+  return 77;
+}
diff --git a/src/grep/gnulib-tests/test-inttypes.c b/src/grep/gnulib-tests/test-inttypes.c
new file mode 100644
index 0000000..f7f2e3a
--- /dev/null
+++ b/src/grep/gnulib-tests/test-inttypes.c
@@ -0,0 +1,118 @@
+/* Test of <inttypes.h> substitute.
+   Copyright (C) 2006-2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <inttypes.h>
+
+#include <stddef.h>
+
+/* Tests for macros supposed to be defined in inttypes.h.  */
+
+const char *k = /* implicit string concatenation */
+#ifdef INT8_MAX
+  PRId8 PRIi8
+#endif
+#ifdef UINT8_MAX
+  PRIo8 PRIu8 PRIx8 PRIX8
+#endif
+#ifdef INT16_MAX
+  PRId16 PRIi16
+#endif
+#ifdef UINT16_MAX
+  PRIo16 PRIu16 PRIx16 PRIX16
+#endif
+#ifdef INT32_MAX
+  PRId32 PRIi32
+#endif
+#ifdef UINT32_MAX
+  PRIo32 PRIu32 PRIx32 PRIX32
+#endif
+#ifdef INT64_MAX
+  PRId64 PRIi64
+#endif
+#ifdef UINT64_MAX
+  PRIo64 PRIu64 PRIx64 PRIX64
+#endif
+  PRIdLEAST8 PRIiLEAST8 PRIoLEAST8 PRIuLEAST8 PRIxLEAST8 PRIXLEAST8
+  PRIdLEAST16 PRIiLEAST16 PRIoLEAST16 PRIuLEAST16 PRIxLEAST16 PRIXLEAST16
+  PRIdLEAST32 PRIiLEAST32 PRIoLEAST32 PRIuLEAST32 PRIxLEAST32 PRIXLEAST32
+  PRIdLEAST64 PRIiLEAST64
+  PRIoLEAST64 PRIuLEAST64 PRIxLEAST64 PRIXLEAST64
+  PRIdFAST8 PRIiFAST8 PRIoFAST8 PRIuFAST8 PRIxFAST8 PRIXFAST8
+  PRIdFAST16 PRIiFAST16 PRIoFAST16 PRIuFAST16 PRIxFAST16 PRIXFAST16
+  PRIdFAST32 PRIiFAST32 PRIoFAST32 PRIuFAST32 PRIxFAST32 PRIXFAST32
+  PRIdFAST64 PRIiFAST64
+  PRIoFAST64 PRIuFAST64 PRIxFAST64 PRIXFAST64
+  PRIdMAX PRIiMAX PRIoMAX PRIuMAX PRIxMAX PRIXMAX
+#ifdef INTPTR_MAX
+  PRIdPTR PRIiPTR
+#endif
+#ifdef UINTPTR_MAX
+  PRIoPTR PRIuPTR PRIxPTR PRIXPTR
+#endif
+  ;
+const char *l = /* implicit string concatenation */
+#ifdef INT8_MAX
+  SCNd8 SCNi8
+#endif
+#ifdef UINT8_MAX
+  SCNo8 SCNu8 SCNx8
+#endif
+#ifdef INT16_MAX
+  SCNd16 SCNi16
+#endif
+#ifdef UINT16_MAX
+  SCNo16 SCNu16 SCNx16
+#endif
+#ifdef INT32_MAX
+  SCNd32 SCNi32
+#endif
+#ifdef UINT32_MAX
+  SCNo32 SCNu32 SCNx32
+#endif
+#ifdef INT64_MAX
+  SCNd64 SCNi64
+#endif
+#ifdef UINT64_MAX
+  SCNo64 SCNu64 SCNx64
+#endif
+  SCNdLEAST8 SCNiLEAST8 SCNoLEAST8 SCNuLEAST8 SCNxLEAST8
+  SCNdLEAST16 SCNiLEAST16 SCNoLEAST16 SCNuLEAST16 SCNxLEAST16
+  SCNdLEAST32 SCNiLEAST32 SCNoLEAST32 SCNuLEAST32 SCNxLEAST32
+  SCNdLEAST64 SCNiLEAST64
+  SCNoLEAST64 SCNuLEAST64 SCNxLEAST64
+  SCNdFAST8 SCNiFAST8 SCNoFAST8 SCNuFAST8 SCNxFAST8
+  SCNdFAST16 SCNiFAST16 SCNoFAST16 SCNuFAST16 SCNxFAST16
+  SCNdFAST32 SCNiFAST32 SCNoFAST32 SCNuFAST32 SCNxFAST32
+  SCNdFAST64 SCNiFAST64
+  SCNoFAST64 SCNuFAST64 SCNxFAST64
+  SCNdMAX SCNiMAX SCNoMAX SCNuMAX SCNxMAX
+#ifdef INTPTR_MAX
+  SCNdPTR SCNiPTR
+#endif
+#ifdef UINTPTR_MAX
+  SCNoPTR SCNuPTR SCNxPTR
+#endif
+  ;
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-ioctl.c b/src/grep/gnulib-tests/test-ioctl.c
new file mode 100644
index 0000000..6d7b629
--- /dev/null
+++ b/src/grep/gnulib-tests/test-ioctl.c
@@ -0,0 +1,51 @@
+/* Test of ioctl() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <sys/ioctl.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (ioctl, int, (int, int, ...));
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+#ifdef FIONREAD
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    int value;
+    errno = 0;
+    ASSERT (ioctl (-1, FIONREAD, &value) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    int value;
+    close (99);
+    errno = 0;
+    ASSERT (ioctl (99, FIONREAD, &value) == -1);
+    ASSERT (errno == EBADF);
+  }
+#endif
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-isatty.c b/src/grep/gnulib-tests/test-isatty.c
new file mode 100644
index 0000000..d6b7117
--- /dev/null
+++ b/src/grep/gnulib-tests/test-isatty.c
@@ -0,0 +1,99 @@
+/* Test isatty() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (isatty, int, (int));
+
+#include <errno.h>
+#include <fcntl.h>
+
+#include "macros.h"
+
+/* The name of the "always silent" device.  */
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Native Windows API.  */
+# define DEV_NULL "NUL"
+#else
+/* Unix API.  */
+# define DEV_NULL "/dev/null"
+#endif
+
+int
+main (void)
+{
+  const char *file = "test-isatty.txt";
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    errno = 0;
+    ASSERT (isatty (-1) == 0);
+    ASSERT (errno == EBADF
+            || errno == 0 /* seen on IRIX 6.5, Solaris 10 */
+           );
+  }
+  {
+    close (99);
+    errno = 0;
+    ASSERT (isatty (99) == 0);
+    ASSERT (errno == EBADF
+            || errno == 0 /* seen on IRIX 6.5, Solaris 10 */
+           );
+  }
+
+  /* Test behaviour for regular files.  */
+  {
+    int fd;
+
+    fd = open (file, O_WRONLY|O_CREAT|O_TRUNC, 0644);
+    ASSERT (0 <= fd);
+    ASSERT (write (fd, "hello", 5) == 5);
+    ASSERT (close (fd) == 0);
+
+    fd = open (file, O_RDONLY);
+    ASSERT (0 <= fd);
+    ASSERT (! isatty (fd));
+    ASSERT (close (fd) == 0);
+  }
+
+  /* Test behaviour for pipes.  */
+  {
+    int fd[2];
+
+    ASSERT (pipe (fd) == 0);
+    ASSERT (! isatty (fd[0]));
+    ASSERT (! isatty (fd[1]));
+    ASSERT (close (fd[0]) == 0);
+    ASSERT (close (fd[1]) == 0);
+  }
+
+  /* Test behaviour for /dev/null.  */
+  {
+    int fd;
+
+    fd = open (DEV_NULL, O_RDONLY);
+    ASSERT (0 <= fd);
+    ASSERT (! isatty (fd));
+    ASSERT (close (fd) == 0);
+  }
+
+  ASSERT (unlink (file) == 0);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-isblank.c b/src/grep/gnulib-tests/test-isblank.c
new file mode 100644
index 0000000..eca2366
--- /dev/null
+++ b/src/grep/gnulib-tests/test-isblank.c
@@ -0,0 +1,50 @@
+/* Test of isblank() function.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+#include <config.h>
+
+#include <ctype.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (isblank, int, (int));
+
+#include <limits.h>
+#include <stdio.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  unsigned int c;
+
+  /* Verify the property in the "C" locale.
+     POSIX specifies in
+       <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html>
+     that
+       - in all locales, the blank characters include the <space> and <tab>
+         characters,
+       - in the "POSIX" locale (which is usually the same as the "C" locale),
+         the blank characters include only the ASCII <space> and <tab>
+         characters.  */
+  for (c = 0; c <= UCHAR_MAX; c++)
+    ASSERT (!isblank (c) == !(c == ' ' || c == '\t'));
+  ASSERT (!isblank (EOF));
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-iswblank.c b/src/grep/gnulib-tests/test-iswblank.c
new file mode 100644
index 0000000..3f69114
--- /dev/null
+++ b/src/grep/gnulib-tests/test-iswblank.c
@@ -0,0 +1,35 @@
+/* Test of iswblank() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <wctype.h>
+
+#include "macros.h"
+
+/* Check that WEOF is defined.  */
+wint_t e = WEOF;
+
+int
+main (void)
+{
+  /* Check that the function exist as a function or as a macro.  */
+  (void) iswblank (0);
+  /* Check that the isw* functions map WEOF to 0.  */
+  ASSERT (!iswblank (e));
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-iswdigit.c b/src/grep/gnulib-tests/test-iswdigit.c
new file mode 100644
index 0000000..bcd66a0
--- /dev/null
+++ b/src/grep/gnulib-tests/test-iswdigit.c
@@ -0,0 +1,233 @@
+/* Test of iswdigit() function.
+   Copyright (C) 2020-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <wctype.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (iswdigit, int, (wint_t));
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+
+#include "macros.h"
+
+/* Returns the value of iswdigit for the multibyte character s[0..n-1].  */
+static int
+for_character (const char *s, size_t n)
+{
+  mbstate_t state;
+  wchar_t wc;
+  size_t ret;
+
+  memset (&state, '\0', sizeof (mbstate_t));
+  wc = (wchar_t) 0xBADFACE;
+  ret = mbrtowc (&wc, s, n, &state);
+  if (ret == n)
+    return iswdigit (wc);
+  else
+    return 0;
+}
+
+int
+main (int argc, char *argv[])
+{
+  int is;
+  char buf[4];
+
+  /* configure should already have checked that the locale is supported.  */
+  if (setlocale (LC_ALL, "") == NULL)
+    return 1;
+
+  /* Test WEOF.  */
+  is = iswdigit (WEOF);
+  ASSERT (is == 0);
+
+  /* Test single-byte characters.
+     ISO C 99 sections 7.25.2.1.5 and 5.2.1 specify that the decimal digits
+     include only the ASCII 0 ... 9 characters.  */
+  {
+    int c;
+
+    for (c = 0; c < 0x100; c++)
+      switch (c)
+        {
+        case '\t': case '\v': case '\f':
+        case ' ': case '!': case '"': case '#': case '%':
+        case '&': case '\'': case '(': case ')': case '*':
+        case '+': case ',': case '-': case '.': case '/':
+        case '0': case '1': case '2': case '3': case '4':
+        case '5': case '6': case '7': case '8': case '9':
+        case ':': case ';': case '<': case '=': case '>':
+        case '?':
+        case 'A': case 'B': case 'C': case 'D': case 'E':
+        case 'F': case 'G': case 'H': case 'I': case 'J':
+        case 'K': case 'L': case 'M': case 'N': case 'O':
+        case 'P': case 'Q': case 'R': case 'S': case 'T':
+        case 'U': case 'V': case 'W': case 'X': case 'Y':
+        case 'Z':
+        case '[': case '\\': case ']': case '^': case '_':
+        case 'a': case 'b': case 'c': case 'd': case 'e':
+        case 'f': case 'g': case 'h': case 'i': case 'j':
+        case 'k': case 'l': case 'm': case 'n': case 'o':
+        case 'p': case 'q': case 'r': case 's': case 't':
+        case 'u': case 'v': case 'w': case 'x': case 'y':
+        case 'z': case '{': case '|': case '}': case '~':
+          /* c is in the ISO C "basic character set".  */
+          buf[0] = (unsigned char) c;
+          is = for_character (buf, 1);
+          switch (c)
+            {
+            case '0': case '1': case '2': case '3': case '4':
+            case '5': case '6': case '7': case '8': case '9':
+              ASSERT (is != 0);
+              break;
+            default:
+              ASSERT (is == 0);
+              break;
+            }
+          break;
+        }
+  }
+
+  if (argc > 1)
+    switch (argv[1][0])
+      {
+      case '0':
+        /* C locale; tested above.  */
+        return 0;
+
+      case '1':
+        /* Locale encoding is ISO-8859-1 or ISO-8859-15.  */
+        {
+          /* U+00B2 SUPERSCRIPT TWO */
+          is = for_character ("\262", 1);
+          ASSERT (is == 0);
+          /* U+00B3 SUPERSCRIPT THREE */
+          is = for_character ("\263", 1);
+          ASSERT (is == 0);
+          /* U+00B9 SUPERSCRIPT ONE */
+          is = for_character ("\271", 1);
+          ASSERT (is == 0);
+        }
+        return 0;
+
+      case '2':
+        /* Locale encoding is EUC-JP.  */
+        {
+          /* U+FF11 FULLWIDTH DIGIT ONE */
+          is = for_character ("\243\261", 2);
+          ASSERT (is == 0);
+        }
+        return 0;
+
+      case '3':
+        /* Locale encoding is UTF-8.  */
+        {
+          /* U+00B2 SUPERSCRIPT TWO */
+          is = for_character ("\302\262", 2);
+          ASSERT (is == 0);
+          /* U+00B3 SUPERSCRIPT THREE */
+          is = for_character ("\302\263", 2);
+          ASSERT (is == 0);
+          /* U+00B9 SUPERSCRIPT ONE */
+          is = for_character ("\302\271", 2);
+          ASSERT (is == 0);
+          /* U+0663 ARABIC-INDIC DIGIT THREE */
+          is = for_character ("\331\243", 2);
+          ASSERT (is == 0);
+          /* U+2070 SUPERSCRIPT ZERO */
+          is = for_character ("\342\201\260", 3);
+          ASSERT (is == 0);
+          /* U+2079 SUPERSCRIPT NINE */
+          is = for_character ("\342\201\271", 3);
+          ASSERT (is == 0);
+          /* U+FF11 FULLWIDTH DIGIT ONE */
+          is = for_character ("\357\274\221", 3);
+          ASSERT (is == 0);
+          /* U+1D7D1 MATHEMATICAL BOLD DIGIT THREE */
+          is = for_character ("\360\235\237\221", 4);
+          ASSERT (is == 0);
+          /* U+1D7DB MATHEMATICAL DOUBLE-STRUCK DIGIT THREE */
+          is = for_character ("\360\235\237\233", 4);
+          ASSERT (is == 0);
+          /* U+1D7E5 MATHEMATICAL SANS-SERIF DIGIT THREE */
+          is = for_character ("\360\235\237\245", 4);
+          ASSERT (is == 0);
+          /* U+1D7EF MATHEMATICAL SANS-SERIF BOLD DIGIT THREE */
+          is = for_character ("\360\235\237\257", 4);
+          ASSERT (is == 0);
+          /* U+1D7F9 MATHEMATICAL MONOSPACE DIGIT THREE */
+          is = for_character ("\360\235\237\271", 4);
+          ASSERT (is == 0);
+          /* U+E0033 TAG DIGIT THREE */
+          is = for_character ("\363\240\200\263", 4);
+          ASSERT (is == 0);
+        }
+        return 0;
+
+      case '4':
+        /* Locale encoding is GB18030.  */
+        {
+          /* U+00B2 SUPERSCRIPT TWO */
+          is = for_character ("\201\060\205\065", 4);
+          ASSERT (is == 0);
+          /* U+00B3 SUPERSCRIPT THREE */
+          is = for_character ("\201\060\205\066", 4);
+          ASSERT (is == 0);
+          /* U+00B9 SUPERSCRIPT ONE */
+          is = for_character ("\201\060\206\061", 4);
+          ASSERT (is == 0);
+          /* U+0663 ARABIC-INDIC DIGIT THREE */
+          is = for_character ("\201\061\211\071", 4);
+          ASSERT (is == 0);
+          /* U+2070 SUPERSCRIPT ZERO */
+          is = for_character ("\201\066\255\062", 4);
+          ASSERT (is == 0);
+          /* U+2079 SUPERSCRIPT NINE */
+          is = for_character ("\201\066\256\061", 4);
+          ASSERT (is == 0);
+          /* U+FF11 FULLWIDTH DIGIT ONE */
+          is = for_character ("\243\261", 2);
+          ASSERT (is == 0);
+          /* U+1D7D1 MATHEMATICAL BOLD DIGIT THREE */
+          is = for_character ("\224\063\353\071", 4);
+          ASSERT (is == 0);
+          /* U+1D7DB MATHEMATICAL DOUBLE-STRUCK DIGIT THREE */
+          is = for_character ("\224\063\354\071", 4);
+          ASSERT (is == 0);
+          /* U+1D7E5 MATHEMATICAL SANS-SERIF DIGIT THREE */
+          is = for_character ("\224\063\355\071", 4);
+          ASSERT (is == 0);
+          /* U+1D7EF MATHEMATICAL SANS-SERIF BOLD DIGIT THREE */
+          is = for_character ("\224\063\356\071", 4);
+          ASSERT (is == 0);
+          /* U+1D7F9 MATHEMATICAL MONOSPACE DIGIT THREE */
+          is = for_character ("\224\063\357\071", 4);
+          ASSERT (is == 0);
+          /* U+E0033 TAG DIGIT THREE */
+          is = for_character ("\323\066\232\071", 4);
+          ASSERT (is == 0);
+        }
+        return 0;
+
+      }
+
+  return 1;
+}
diff --git a/src/grep/gnulib-tests/test-iswdigit.sh b/src/grep/gnulib-tests/test-iswdigit.sh
new file mode 100755
index 0000000..1bde602
--- /dev/null
+++ b/src/grep/gnulib-tests/test-iswdigit.sh
@@ -0,0 +1,39 @@
+#!/bin/sh
+
+# Test in the POSIX locale.
+LC_ALL=C     ${CHECKER} ./test-iswdigit${EXEEXT} 0 || exit 1
+LC_ALL=POSIX ${CHECKER} ./test-iswdigit${EXEEXT} 0 || exit 1
+
+# Test in an ISO-8859-1 or ISO-8859-15 locale.
+: ${LOCALE_FR=fr_FR}
+if test $LOCALE_FR != none; then
+  LC_ALL=$LOCALE_FR \
+  ${CHECKER} ./test-iswdigit${EXEEXT} 1 \
+  || exit 1
+fi
+
+# Test whether a specific EUC-JP locale is installed.
+: ${LOCALE_JA=ja_JP}
+if test $LOCALE_JA != none; then
+  LC_ALL=$LOCALE_JA \
+  ${CHECKER} ./test-iswdigit${EXEEXT} 2 \
+  || exit 1
+fi
+
+# Test whether a specific UTF-8 locale is installed.
+: ${LOCALE_FR_UTF8=fr_FR.UTF-8}
+if test $LOCALE_FR_UTF8 != none; then
+  LC_ALL=$LOCALE_FR_UTF8 \
+  ${CHECKER} ./test-iswdigit${EXEEXT} 3 \
+  || exit 1
+fi
+
+# Test whether a specific GB18030 locale is installed.
+: ${LOCALE_ZH_CN=zh_CN.GB18030}
+if test $LOCALE_ZH_CN != none; then
+  LC_ALL=$LOCALE_ZH_CN \
+  ${CHECKER} ./test-iswdigit${EXEEXT} 4 \
+  || exit 1
+fi
+
+exit 0
diff --git a/src/grep/gnulib-tests/test-iswxdigit.c b/src/grep/gnulib-tests/test-iswxdigit.c
new file mode 100644
index 0000000..15425ee
--- /dev/null
+++ b/src/grep/gnulib-tests/test-iswxdigit.c
@@ -0,0 +1,259 @@
+/* Test of iswxdigit() function.
+   Copyright (C) 2020-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <wctype.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (iswxdigit, int, (wint_t));
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+
+#include "macros.h"
+
+/* Returns the value of iswxdigit for the multibyte character s[0..n-1].  */
+static int
+for_character (const char *s, size_t n)
+{
+  mbstate_t state;
+  wchar_t wc;
+  size_t ret;
+
+  memset (&state, '\0', sizeof (mbstate_t));
+  wc = (wchar_t) 0xBADFACE;
+  ret = mbrtowc (&wc, s, n, &state);
+  if (ret == n)
+    return iswxdigit (wc);
+  else
+    return 0;
+}
+
+int
+main (int argc, char *argv[])
+{
+  int is;
+  char buf[4];
+
+  /* configure should already have checked that the locale is supported.  */
+  if (setlocale (LC_ALL, "") == NULL)
+    return 1;
+
+  /* Test WEOF.  */
+  is = iswxdigit (WEOF);
+  ASSERT (is == 0);
+
+  /* Test single-byte characters.
+     ISO C 99 sections 7.25.2.1.12 and 6.4.4.1 specify that the hexadecimal
+     digits include only the ASCII 0 ... 9 A ... F a ... f characters.  */
+  {
+    int c;
+
+    for (c = 0; c < 0x100; c++)
+      switch (c)
+        {
+        case '\t': case '\v': case '\f':
+        case ' ': case '!': case '"': case '#': case '%':
+        case '&': case '\'': case '(': case ')': case '*':
+        case '+': case ',': case '-': case '.': case '/':
+        case '0': case '1': case '2': case '3': case '4':
+        case '5': case '6': case '7': case '8': case '9':
+        case ':': case ';': case '<': case '=': case '>':
+        case '?':
+        case 'A': case 'B': case 'C': case 'D': case 'E':
+        case 'F': case 'G': case 'H': case 'I': case 'J':
+        case 'K': case 'L': case 'M': case 'N': case 'O':
+        case 'P': case 'Q': case 'R': case 'S': case 'T':
+        case 'U': case 'V': case 'W': case 'X': case 'Y':
+        case 'Z':
+        case '[': case '\\': case ']': case '^': case '_':
+        case 'a': case 'b': case 'c': case 'd': case 'e':
+        case 'f': case 'g': case 'h': case 'i': case 'j':
+        case 'k': case 'l': case 'm': case 'n': case 'o':
+        case 'p': case 'q': case 'r': case 's': case 't':
+        case 'u': case 'v': case 'w': case 'x': case 'y':
+        case 'z': case '{': case '|': case '}': case '~':
+          /* c is in the ISO C "basic character set".  */
+          buf[0] = (unsigned char) c;
+          is = for_character (buf, 1);
+          switch (c)
+            {
+            case '0': case '1': case '2': case '3': case '4':
+            case '5': case '6': case '7': case '8': case '9':
+            case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
+            case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
+              ASSERT (is != 0);
+              break;
+            default:
+              ASSERT (is == 0);
+              break;
+            }
+          break;
+        }
+  }
+
+  if (argc > 1)
+    switch (argv[1][0])
+      {
+      case '0':
+        /* C locale; tested above.  */
+        return 0;
+
+      case '1':
+        /* Locale encoding is ISO-8859-1 or ISO-8859-15.  */
+        {
+          /* U+00B2 SUPERSCRIPT TWO */
+          is = for_character ("\262", 1);
+          ASSERT (is == 0);
+          /* U+00B3 SUPERSCRIPT THREE */
+          is = for_character ("\263", 1);
+          ASSERT (is == 0);
+          /* U+00B9 SUPERSCRIPT ONE */
+          is = for_character ("\271", 1);
+          ASSERT (is == 0);
+        }
+        return 0;
+
+      case '2':
+        /* Locale encoding is EUC-JP.  */
+        {
+          /* U+FF11 FULLWIDTH DIGIT ONE */
+          is = for_character ("\243\261", 2);
+          ASSERT (is == 0);
+          /* U+FF21 FULLWIDTH LATIN CAPITAL LETTER A */
+          is = for_character ("\243\301", 2);
+          ASSERT (is == 0);
+          /* U+FF41 FULLWIDTH LATIN SMALL LETTER A */
+          is = for_character ("\243\341", 2);
+          ASSERT (is == 0);
+        }
+        return 0;
+
+      case '3':
+        /* Locale encoding is UTF-8.  */
+        {
+          /* U+00B2 SUPERSCRIPT TWO */
+          is = for_character ("\302\262", 2);
+          ASSERT (is == 0);
+          /* U+00B3 SUPERSCRIPT THREE */
+          is = for_character ("\302\263", 2);
+          ASSERT (is == 0);
+          /* U+00B9 SUPERSCRIPT ONE */
+          is = for_character ("\302\271", 2);
+          ASSERT (is == 0);
+          /* U+0663 ARABIC-INDIC DIGIT THREE */
+          is = for_character ("\331\243", 2);
+          ASSERT (is == 0);
+          /* U+2070 SUPERSCRIPT ZERO */
+          is = for_character ("\342\201\260", 3);
+          ASSERT (is == 0);
+          /* U+2079 SUPERSCRIPT NINE */
+          is = for_character ("\342\201\271", 3);
+          ASSERT (is == 0);
+          /* U+FF11 FULLWIDTH DIGIT ONE */
+          is = for_character ("\357\274\221", 3);
+          ASSERT (is == 0);
+          /* U+FF21 FULLWIDTH LATIN CAPITAL LETTER A */
+          is = for_character ("\357\274\241", 3);
+          ASSERT (is == 0);
+          /* U+FF41 FULLWIDTH LATIN SMALL LETTER A */
+          is = for_character ("\357\275\201", 3);
+          ASSERT (is == 0);
+          /* U+1D7D1 MATHEMATICAL BOLD DIGIT THREE */
+          is = for_character ("\360\235\237\221", 4);
+          ASSERT (is == 0);
+          /* U+1D7DB MATHEMATICAL DOUBLE-STRUCK DIGIT THREE */
+          is = for_character ("\360\235\237\233", 4);
+          ASSERT (is == 0);
+          /* U+1D7E5 MATHEMATICAL SANS-SERIF DIGIT THREE */
+          is = for_character ("\360\235\237\245", 4);
+          ASSERT (is == 0);
+          /* U+1D7EF MATHEMATICAL SANS-SERIF BOLD DIGIT THREE */
+          is = for_character ("\360\235\237\257", 4);
+          ASSERT (is == 0);
+          /* U+1D7F9 MATHEMATICAL MONOSPACE DIGIT THREE */
+          is = for_character ("\360\235\237\271", 4);
+          ASSERT (is == 0);
+          /* U+E0033 TAG DIGIT THREE */
+          is = for_character ("\363\240\200\263", 4);
+          ASSERT (is == 0);
+          /* U+E0041 TAG LATIN CAPITAL LETTER A */
+          is = for_character ("\363\240\201\201", 4);
+          ASSERT (is == 0);
+        }
+        return 0;
+
+      case '4':
+        /* Locale encoding is GB18030.  */
+        {
+          /* U+00B2 SUPERSCRIPT TWO */
+          is = for_character ("\201\060\205\065", 4);
+          ASSERT (is == 0);
+          /* U+00B3 SUPERSCRIPT THREE */
+          is = for_character ("\201\060\205\066", 4);
+          ASSERT (is == 0);
+          /* U+00B9 SUPERSCRIPT ONE */
+          is = for_character ("\201\060\206\061", 4);
+          ASSERT (is == 0);
+          /* U+0663 ARABIC-INDIC DIGIT THREE */
+          is = for_character ("\201\061\211\071", 4);
+          ASSERT (is == 0);
+          /* U+2070 SUPERSCRIPT ZERO */
+          is = for_character ("\201\066\255\062", 4);
+          ASSERT (is == 0);
+          /* U+2079 SUPERSCRIPT NINE */
+          is = for_character ("\201\066\256\061", 4);
+          ASSERT (is == 0);
+          /* U+FF11 FULLWIDTH DIGIT ONE */
+          is = for_character ("\243\261", 2);
+          ASSERT (is == 0);
+          /* U+FF21 FULLWIDTH LATIN CAPITAL LETTER A */
+          is = for_character ("\243\301", 2);
+          ASSERT (is == 0);
+          /* U+FF41 FULLWIDTH LATIN SMALL LETTER A */
+          is = for_character ("\243\341", 2);
+          ASSERT (is == 0);
+          /* U+1D7D1 MATHEMATICAL BOLD DIGIT THREE */
+          is = for_character ("\224\063\353\071", 4);
+          ASSERT (is == 0);
+          /* U+1D7DB MATHEMATICAL DOUBLE-STRUCK DIGIT THREE */
+          is = for_character ("\224\063\354\071", 4);
+          ASSERT (is == 0);
+          /* U+1D7E5 MATHEMATICAL SANS-SERIF DIGIT THREE */
+          is = for_character ("\224\063\355\071", 4);
+          ASSERT (is == 0);
+          /* U+1D7EF MATHEMATICAL SANS-SERIF BOLD DIGIT THREE */
+          is = for_character ("\224\063\356\071", 4);
+          ASSERT (is == 0);
+          /* U+1D7F9 MATHEMATICAL MONOSPACE DIGIT THREE */
+          is = for_character ("\224\063\357\071", 4);
+          ASSERT (is == 0);
+          /* U+E0033 TAG DIGIT THREE */
+          is = for_character ("\323\066\232\071", 4);
+          ASSERT (is == 0);
+          /* U+E0041 TAG LATIN CAPITAL LETTER A */
+          is = for_character ("\323\066\234\063", 4);
+          ASSERT (is == 0);
+        }
+        return 0;
+
+      }
+
+  return 1;
+}
diff --git a/src/grep/gnulib-tests/test-iswxdigit.sh b/src/grep/gnulib-tests/test-iswxdigit.sh
new file mode 100755
index 0000000..f545438
--- /dev/null
+++ b/src/grep/gnulib-tests/test-iswxdigit.sh
@@ -0,0 +1,39 @@
+#!/bin/sh
+
+# Test in the POSIX locale.
+LC_ALL=C     ${CHECKER} ./test-iswxdigit${EXEEXT} 0 || exit 1
+LC_ALL=POSIX ${CHECKER} ./test-iswxdigit${EXEEXT} 0 || exit 1
+
+# Test in an ISO-8859-1 or ISO-8859-15 locale.
+: ${LOCALE_FR=fr_FR}
+if test $LOCALE_FR != none; then
+  LC_ALL=$LOCALE_FR \
+  ${CHECKER} ./test-iswxdigit${EXEEXT} 1 \
+  || exit 1
+fi
+
+# Test whether a specific EUC-JP locale is installed.
+: ${LOCALE_JA=ja_JP}
+if test $LOCALE_JA != none; then
+  LC_ALL=$LOCALE_JA \
+  ${CHECKER} ./test-iswxdigit${EXEEXT} 2 \
+  || exit 1
+fi
+
+# Test whether a specific UTF-8 locale is installed.
+: ${LOCALE_FR_UTF8=fr_FR.UTF-8}
+if test $LOCALE_FR_UTF8 != none; then
+  LC_ALL=$LOCALE_FR_UTF8 \
+  ${CHECKER} ./test-iswxdigit${EXEEXT} 3 \
+  || exit 1
+fi
+
+# Test whether a specific GB18030 locale is installed.
+: ${LOCALE_ZH_CN=zh_CN.GB18030}
+if test $LOCALE_ZH_CN != none; then
+  LC_ALL=$LOCALE_ZH_CN \
+  ${CHECKER} ./test-iswxdigit${EXEEXT} 4 \
+  || exit 1
+fi
+
+exit 0
diff --git a/src/grep/gnulib-tests/test-langinfo.c b/src/grep/gnulib-tests/test-langinfo.c
new file mode 100644
index 0000000..4215ea7
--- /dev/null
+++ b/src/grep/gnulib-tests/test-langinfo.c
@@ -0,0 +1,92 @@
+/* Test of <langinfo.h> substitute.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+#include <config.h>
+
+#include <langinfo.h>
+
+/* Check that all the nl_item values are defined.  */
+int items[] =
+  {
+    /* nl_langinfo items of the LC_CTYPE category */
+    CODESET,
+    /* nl_langinfo items of the LC_NUMERIC category */
+    RADIXCHAR,
+    THOUSEP,
+    /* nl_langinfo items of the LC_TIME category */
+    D_T_FMT,
+    D_FMT,
+    T_FMT,
+    T_FMT_AMPM,
+    AM_STR,
+    PM_STR,
+    DAY_1,
+    DAY_2,
+    DAY_3,
+    DAY_4,
+    DAY_5,
+    DAY_6,
+    DAY_7,
+    ABDAY_1,
+    ABDAY_2,
+    ABDAY_3,
+    ABDAY_4,
+    ABDAY_5,
+    ABDAY_6,
+    ABDAY_7,
+    MON_1,
+    MON_2,
+    MON_3,
+    MON_4,
+    MON_5,
+    MON_6,
+    MON_7,
+    MON_8,
+    MON_9,
+    MON_10,
+    MON_11,
+    MON_12,
+    ABMON_1,
+    ABMON_2,
+    ABMON_3,
+    ABMON_4,
+    ABMON_5,
+    ABMON_6,
+    ABMON_7,
+    ABMON_8,
+    ABMON_9,
+    ABMON_10,
+    ABMON_11,
+    ABMON_12,
+    ERA,
+    ERA_D_FMT,
+    ERA_D_T_FMT,
+    ERA_T_FMT,
+    ALT_DIGITS,
+    /* nl_langinfo items of the LC_MONETARY category */
+    CRNCYSTR,
+    /* nl_langinfo items of the LC_MESSAGES category */
+    YESEXPR,
+    NOEXPR
+  };
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-limits-h.c b/src/grep/gnulib-tests/test-limits-h.c
new file mode 100644
index 0000000..f3394c1
--- /dev/null
+++ b/src/grep/gnulib-tests/test-limits-h.c
@@ -0,0 +1,122 @@
+/* Test of <limits.h> substitute.
+   Copyright 2016-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+#include <config.h>
+
+#include <limits.h>
+
+#include "verify.h"
+
+#if 4 < __GNUC__ + (3 <= __GNUC_MINOR__)
+# pragma GCC diagnostic ignored "-Woverlength-strings"
+#endif
+
+#define verify_width(width, min, max) \
+  verify ((max) >> ((width) - 1 - ((min) < 0)) == 1)
+
+/* Macros borrowed from intprops.h.  */
+#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
+#define TYPE_WIDTH(t) (sizeof (t) * CHAR_BIT)
+#define TYPE_MINIMUM(t) ((t) ~ TYPE_MAXIMUM (t))
+#define TYPE_MAXIMUM(t)                                                 \
+  ((t) (! TYPE_SIGNED (t)                                               \
+        ? (t) -1                                                        \
+        : ((((t) 1 << (TYPE_WIDTH (t) - 2)) - 1) * 2 + 1)))
+
+/* Type width macros.  */
+
+int type_bits[] =
+  {
+    CHAR_BIT,
+    WORD_BIT,
+    LONG_BIT
+  };
+verify_width (CHAR_BIT, CHAR_MIN, CHAR_MAX);
+verify_width (WORD_BIT, INT_MIN, INT_MAX);
+verify_width (LONG_BIT, LONG_MIN, LONG_MAX);
+
+/* Numerical limit macros.  */
+
+char               limits1[]  = { CHAR_MIN, CHAR_MAX };
+verify (TYPE_MINIMUM (char) == CHAR_MIN);
+verify (TYPE_MAXIMUM (char) == CHAR_MAX);
+
+signed char        limits2[]  = { SCHAR_MIN, SCHAR_MAX };
+verify (TYPE_MINIMUM (signed char) == SCHAR_MIN);
+verify (TYPE_MAXIMUM (signed char) == SCHAR_MAX);
+
+unsigned char      limits3[]  = { UCHAR_MAX };
+verify (TYPE_MINIMUM (unsigned char) == 0);
+verify (TYPE_MAXIMUM (unsigned char) == UCHAR_MAX);
+
+short              limits4[]  = { SHRT_MIN, SHRT_MAX };
+verify (TYPE_MINIMUM (short int) == SHRT_MIN);
+verify (TYPE_MAXIMUM (short int) == SHRT_MAX);
+
+unsigned short     limits5[]  = { USHRT_MAX };
+verify (TYPE_MINIMUM (unsigned short int) == 0);
+verify (TYPE_MAXIMUM (unsigned short int) == USHRT_MAX);
+
+int                limits6[]  = { INT_MIN, INT_MAX };
+verify (TYPE_MINIMUM (int) == INT_MIN);
+verify (TYPE_MAXIMUM (int) == INT_MAX);
+
+unsigned int       limits7[]  = { UINT_MAX };
+verify (TYPE_MINIMUM (unsigned int) == 0);
+verify (TYPE_MAXIMUM (unsigned int) == UINT_MAX);
+
+long               limits8[]  = { LONG_MIN, LONG_MAX };
+verify (TYPE_MINIMUM (long int) == LONG_MIN);
+verify (TYPE_MAXIMUM (long int) == LONG_MAX);
+
+unsigned long      limits9[]  = { ULONG_MAX };
+verify (TYPE_MINIMUM (unsigned long int) == 0);
+verify (TYPE_MAXIMUM (unsigned long int) == ULONG_MAX);
+
+long long          limits10[] = { LLONG_MIN, LLONG_MAX };
+verify (TYPE_MINIMUM (long long int) == LLONG_MIN);
+verify (TYPE_MAXIMUM (long long int) == LLONG_MAX);
+
+unsigned long long limits11[] = { ULLONG_MAX };
+verify (TYPE_MINIMUM (unsigned long long int) == 0);
+verify (TYPE_MAXIMUM (unsigned long long int) == ULLONG_MAX);
+
+/* Macros specified by ISO/IEC TS 18661-1:2014.  */
+
+verify_width (CHAR_WIDTH, CHAR_MIN, CHAR_MAX);
+verify_width (SCHAR_WIDTH, SCHAR_MIN, SCHAR_MAX);
+verify_width (UCHAR_WIDTH, 0, UCHAR_MAX);
+verify_width (SHRT_WIDTH, SHRT_MIN, SHRT_MAX);
+verify_width (USHRT_WIDTH, 0, USHRT_MAX);
+verify_width (INT_WIDTH, INT_MIN, INT_MAX);
+verify_width (UINT_WIDTH, 0, UINT_MAX);
+verify_width (LONG_WIDTH, LONG_MIN, LONG_MAX);
+verify_width (ULONG_WIDTH, 0, ULONG_MAX);
+verify_width (LLONG_WIDTH, LLONG_MIN, LLONG_MAX);
+verify_width (ULLONG_WIDTH, 0, ULLONG_MAX);
+
+/* Macros specified by C2x.  */
+
+int bool_attrs[] = { BOOL_MAX, BOOL_WIDTH };
+verify (BOOL_MAX == (((1U << (BOOL_WIDTH - 1)) - 1) * 2) + 1);
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-listen.c b/src/grep/gnulib-tests/test-listen.c
new file mode 100644
index 0000000..3692514
--- /dev/null
+++ b/src/grep/gnulib-tests/test-listen.c
@@ -0,0 +1,49 @@
+/* Test listen() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (listen, int, (int, int));
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "sockets.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    errno = 0;
+    ASSERT (listen (-1, 1) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    close (99);
+    errno = 0;
+    ASSERT (listen (99 ,1) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-localcharset.c b/src/grep/gnulib-tests/test-localcharset.c
new file mode 100644
index 0000000..07b756c
--- /dev/null
+++ b/src/grep/gnulib-tests/test-localcharset.c
@@ -0,0 +1,39 @@
+/* Manual test of localcharset() function.
+   Copyright (C) 2018-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* This program prints the result of locale_charset in the current locale.
+   One way to use it is:
+     $ for l in `locale -a`; do
+         echo -n "$l               "; LANG=$l ./test-localcharset;
+       done \
+       | sort -k 2
+ */
+
+#include <config.h>
+
+#include "localcharset.h"
+
+#include <locale.h>
+#include <stdio.h>
+
+int
+main (void)
+{
+  setlocale (LC_ALL, "");
+  printf ("%s\n", locale_charset ());
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-locale.c b/src/grep/gnulib-tests/test-locale.c
new file mode 100644
index 0000000..59644fa
--- /dev/null
+++ b/src/grep/gnulib-tests/test-locale.c
@@ -0,0 +1,80 @@
+/* Test of <locale.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <locale.h>
+
+#include "verify.h"
+
+int a[] =
+  {
+    LC_ALL,
+    LC_COLLATE,
+    LC_CTYPE,
+    LC_MESSAGES,
+    LC_MONETARY,
+    LC_NUMERIC,
+    LC_TIME
+  };
+
+/* Check that the 'struct lconv' type is defined.  */
+struct lconv l;
+int ls;
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
+int
+main ()
+{
+#if HAVE_WORKING_NEWLOCALE
+  /* Check that the locale_t type and the LC_GLOBAL_LOCALE macro are defined.  */
+  locale_t b = LC_GLOBAL_LOCALE;
+  (void) b;
+#endif
+
+  /* Check that 'struct lconv' has the ISO C and POSIX specified members.  */
+  ls += sizeof (*l.decimal_point);
+  ls += sizeof (*l.thousands_sep);
+  ls += sizeof (*l.grouping);
+  ls += sizeof (*l.mon_decimal_point);
+  ls += sizeof (*l.mon_thousands_sep);
+  ls += sizeof (*l.mon_grouping);
+  ls += sizeof (*l.positive_sign);
+  ls += sizeof (*l.negative_sign);
+  ls += sizeof (*l.currency_symbol);
+  ls += sizeof (l.frac_digits);
+  ls += sizeof (l.p_cs_precedes);
+  ls += sizeof (l.p_sign_posn);
+  ls += sizeof (l.p_sep_by_space);
+  ls += sizeof (l.n_cs_precedes);
+  ls += sizeof (l.n_sign_posn);
+  ls += sizeof (l.n_sep_by_space);
+  ls += sizeof (*l.int_curr_symbol);
+  ls += sizeof (l.int_frac_digits);
+  ls += sizeof (l.int_p_cs_precedes);
+  ls += sizeof (l.int_p_sign_posn);
+  ls += sizeof (l.int_p_sep_by_space);
+  ls += sizeof (l.int_n_cs_precedes);
+  ls += sizeof (l.int_n_sign_posn);
+  ls += sizeof (l.int_n_sep_by_space);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-localeconv.c b/src/grep/gnulib-tests/test-localeconv.c
new file mode 100644
index 0000000..b7998ef
--- /dev/null
+++ b/src/grep/gnulib-tests/test-localeconv.c
@@ -0,0 +1,72 @@
+/* Test of localeconv() function.
+   Copyright (C) 2012-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2012.  */
+
+#include <config.h>
+
+#include <locale.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (localeconv, struct lconv *, (void));
+
+#include <limits.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main ()
+{
+  /* Test localeconv() result in the "C" locale.  */
+  {
+    struct lconv *l = localeconv ();
+
+    ASSERT (STREQ (l->decimal_point, "."));
+    ASSERT (STREQ (l->thousands_sep, ""));
+#if !((defined __FreeBSD__ || defined __DragonFly__) || defined __sun || defined __CYGWIN__)
+    ASSERT (STREQ (l->grouping, ""));
+#endif
+
+    ASSERT (STREQ (l->mon_decimal_point, ""));
+    ASSERT (STREQ (l->mon_thousands_sep, ""));
+#if !((defined __FreeBSD__ || defined __DragonFly__) || defined __sun || defined __CYGWIN__)
+    ASSERT (STREQ (l->mon_grouping, ""));
+#endif
+    ASSERT (STREQ (l->positive_sign, ""));
+    ASSERT (STREQ (l->negative_sign, ""));
+
+    ASSERT (STREQ (l->currency_symbol, ""));
+    ASSERT (l->frac_digits == CHAR_MAX);
+    ASSERT (l->p_cs_precedes == CHAR_MAX);
+    ASSERT (l->p_sign_posn == CHAR_MAX);
+    ASSERT (l->p_sep_by_space == CHAR_MAX);
+    ASSERT (l->n_cs_precedes == CHAR_MAX);
+    ASSERT (l->n_sign_posn == CHAR_MAX);
+    ASSERT (l->n_sep_by_space == CHAR_MAX);
+
+    ASSERT (STREQ (l->int_curr_symbol, ""));
+    ASSERT (l->int_frac_digits == CHAR_MAX);
+    ASSERT (l->int_p_cs_precedes == CHAR_MAX);
+    ASSERT (l->int_p_sign_posn == CHAR_MAX);
+    ASSERT (l->int_p_sep_by_space == CHAR_MAX);
+    ASSERT (l->int_n_cs_precedes == CHAR_MAX);
+    ASSERT (l->int_n_sign_posn == CHAR_MAX);
+    ASSERT (l->int_n_sep_by_space == CHAR_MAX);
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-localename.c b/src/grep/gnulib-tests/test-localename.c
new file mode 100644
index 0000000..22790ab
--- /dev/null
+++ b/src/grep/gnulib-tests/test-localename.c
@@ -0,0 +1,816 @@
+/* Test of gl_locale_name function and its variants.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include "localename.h"
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+
+#if HAVE_WORKING_NEWLOCALE && HAVE_WORKING_USELOCALE && !HAVE_FAKE_LOCALES
+# define HAVE_GOOD_USELOCALE 1
+#endif
+
+
+#if HAVE_GOOD_USELOCALE
+
+static struct { int cat; int mask; const char *string; } const categories[] =
+  {
+      { LC_CTYPE,          LC_CTYPE_MASK,          "LC_CTYPE" },
+      { LC_NUMERIC,        LC_NUMERIC_MASK,        "LC_NUMERIC" },
+      { LC_TIME,           LC_TIME_MASK,           "LC_TIME" },
+      { LC_COLLATE,        LC_COLLATE_MASK,        "LC_COLLATE" },
+      { LC_MONETARY,       LC_MONETARY_MASK,       "LC_MONETARY" },
+      { LC_MESSAGES,       LC_MESSAGES_MASK,       "LC_MESSAGES" }
+# ifdef LC_PAPER
+    , { LC_PAPER,          LC_PAPER_MASK,          "LC_PAPER" }
+# endif
+# ifdef LC_NAME
+    , { LC_NAME,           LC_NAME_MASK,           "LC_NAME" }
+# endif
+# ifdef LC_ADDRESS
+    , { LC_ADDRESS,        LC_ADDRESS_MASK,        "LC_ADDRESS" }
+# endif
+# ifdef LC_TELEPHONE
+    , { LC_TELEPHONE,      LC_TELEPHONE_MASK,      "LC_TELEPHONE" }
+# endif
+# ifdef LC_MEASUREMENT
+    , { LC_MEASUREMENT,    LC_MEASUREMENT_MASK,    "LC_MEASUREMENT" }
+# endif
+# ifdef LC_IDENTIFICATION
+    , { LC_IDENTIFICATION, LC_IDENTIFICATION_MASK, "LC_IDENTIFICATION" }
+# endif
+  };
+
+#endif
+
+/* Test the gl_locale_name() function.  */
+static void
+test_locale_name (void)
+{
+  const char *ret;
+  const char *name;
+
+  /* Check that gl_locale_name returns non-NULL.  */
+  ASSERT (gl_locale_name (LC_MESSAGES, "LC_MESSAGES") != NULL);
+
+  /* Get into a defined state,  */
+  setlocale (LC_ALL, "en_US.UTF-8");
+#if HAVE_GOOD_USELOCALE
+  uselocale (LC_GLOBAL_LOCALE);
+#endif
+
+  /* Check that when all environment variables are unset,
+     gl_locale_name returns the default locale.  */
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LC_NUMERIC");
+  unsetenv ("LANG");
+  /* Need also to unset all environment variables that specify standard or
+     non-standard locale categories.  Otherwise, on glibc systems, when some
+     of these variables are set and reference a nonexistent locale, the
+     setlocale (LC_ALL, "") call below would fail.  */
+  unsetenv ("LC_COLLATE");
+  unsetenv ("LC_MONETARY");
+  unsetenv ("LC_TIME");
+  unsetenv ("LC_ADDRESS");
+  unsetenv ("LC_IDENTIFICATION");
+  unsetenv ("LC_MEASUREMENT");
+  unsetenv ("LC_NAME");
+  unsetenv ("LC_PAPER");
+  unsetenv ("LC_TELEPHONE");
+  ret = setlocale (LC_ALL, "");
+  ASSERT (ret != NULL);
+  ASSERT (strcmp (gl_locale_name (LC_MESSAGES, "LC_MESSAGES"),
+                  gl_locale_name_default ()) == 0);
+  ASSERT (strcmp (gl_locale_name (LC_NUMERIC, "LC_NUMERIC"),
+                  gl_locale_name_default ()) == 0);
+
+  /* Check that an empty environment variable is treated like an unset
+     environment variable.  */
+
+  setenv ("LC_ALL", "", 1);
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  ASSERT (strcmp (gl_locale_name (LC_MESSAGES, "LC_MESSAGES"),
+                  gl_locale_name_default ()) == 0);
+
+  unsetenv ("LC_ALL");
+  setenv ("LC_CTYPE", "", 1);
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  ASSERT (strcmp (gl_locale_name (LC_MESSAGES, "LC_MESSAGES"),
+                  gl_locale_name_default ()) == 0);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "", 1);
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  ASSERT (strcmp (gl_locale_name (LC_MESSAGES, "LC_MESSAGES"),
+                  gl_locale_name_default ()) == 0);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  setenv ("LANG", "", 1);
+  setlocale (LC_ALL, "");
+  ASSERT (strcmp (gl_locale_name (LC_MESSAGES, "LC_MESSAGES"),
+                  gl_locale_name_default ()) == 0);
+
+  /* Check that LC_ALL overrides the others, and LANG is overridden by the
+     others.  */
+
+  setenv ("LC_ALL", "C", 1);
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  ASSERT (strcmp (gl_locale_name (LC_MESSAGES, "LC_MESSAGES"), "C") == 0);
+
+  unsetenv ("LC_ALL");
+  setenv ("LC_CTYPE", "C", 1);
+  setenv ("LC_MESSAGES", "C", 1);
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  ASSERT (strcmp (gl_locale_name (LC_MESSAGES, "LC_MESSAGES"), "C") == 0);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  setenv ("LANG", "C", 1);
+  setlocale (LC_ALL, "");
+  ASSERT (strcmp (gl_locale_name (LC_MESSAGES, "LC_MESSAGES"), "C") == 0);
+
+  /* Check mixed situations.  */
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "fr_FR.UTF-8", 1);
+  setenv ("LANG", "de_DE.UTF-8", 1);
+  if (setlocale (LC_ALL, "") != NULL)
+    {
+      name = gl_locale_name (LC_CTYPE, "LC_CTYPE");
+#if defined _WIN32 && !defined __CYGWIN__
+      /* On native Windows, here,
+           gl_locale_name_thread (LC_CTYPE, "LC_CTYPE")
+         returns NULL and
+           gl_locale_name_posix (LC_CTYPE, "LC_CTYPE")
+         returns either "de_DE" or "de_DE.UTF-8".  */
+      ASSERT (strcmp (name, "de_DE") == 0 || strcmp (name, "de_DE.UTF-8") == 0);
+#else
+      ASSERT (strcmp (name, "de_DE.UTF-8") == 0);
+#endif
+      name = gl_locale_name (LC_MESSAGES, "LC_MESSAGES");
+      ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+    }
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "fr_FR.UTF-8", 1);
+  unsetenv ("LANG");
+  if (setlocale (LC_ALL, "") != NULL)
+    {
+      name = gl_locale_name (LC_CTYPE, "LC_CTYPE");
+      ASSERT (strcmp (name, gl_locale_name_default ()) == 0);
+      name = gl_locale_name (LC_MESSAGES, "LC_MESSAGES");
+      ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+    }
+
+#if HAVE_GOOD_USELOCALE
+  /* Check that gl_locale_name considers the thread locale.  */
+  {
+    locale_t locale = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", NULL);
+    if (locale != NULL)
+      {
+        uselocale (locale);
+        name = gl_locale_name (LC_CTYPE, "LC_CTYPE");
+        ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+        name = gl_locale_name (LC_MESSAGES, "LC_MESSAGES");
+        ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+        uselocale (LC_GLOBAL_LOCALE);
+        freelocale (locale);
+      }
+  }
+
+  /* Check that gl_locale_name distinguishes different categories of the
+     thread locale, and that the name is the right one for each.  */
+  {
+    unsigned int i;
+
+    for (i = 0; i < SIZEOF (categories); i++)
+      {
+        int category_mask = categories[i].mask;
+        locale_t loc = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", NULL);
+        if (loc != NULL)
+          {
+            locale_t locale = newlocale (category_mask, "de_DE.UTF-8", loc);
+            if (locale == NULL)
+              freelocale (loc);
+            else
+              {
+                unsigned int j;
+
+                uselocale (locale);
+                for (j = 0; j < SIZEOF (categories); j++)
+                  {
+                    const char *name_j =
+                      gl_locale_name (categories[j].cat, categories[j].string);
+                    if (j == i)
+                      ASSERT (strcmp (name_j, "de_DE.UTF-8") == 0);
+                    else
+                      ASSERT (strcmp (name_j, "fr_FR.UTF-8") == 0);
+                  }
+                uselocale (LC_GLOBAL_LOCALE);
+                freelocale (locale);
+              }
+          }
+      }
+  }
+#endif
+}
+
+/* Test the gl_locale_name_thread() function.  */
+static void
+test_locale_name_thread (void)
+{
+  /* Get into a defined state,  */
+  setlocale (LC_ALL, "en_US.UTF-8");
+
+#if HAVE_GOOD_USELOCALE
+  /* Check that gl_locale_name_thread returns NULL when no thread locale is
+     set.  */
+  uselocale (LC_GLOBAL_LOCALE);
+  ASSERT (gl_locale_name_thread (LC_CTYPE, "LC_CTYPE") == NULL);
+  ASSERT (gl_locale_name_thread (LC_MESSAGES, "LC_MESSAGES") == NULL);
+
+  /* Check that gl_locale_name_thread considers the thread locale.  */
+  {
+    locale_t locale = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", NULL);
+    if (locale != NULL)
+      {
+        const char *name;
+
+        uselocale (locale);
+        name = gl_locale_name_thread (LC_CTYPE, "LC_CTYPE");
+        ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+        name = gl_locale_name_thread (LC_MESSAGES, "LC_MESSAGES");
+        ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+        uselocale (LC_GLOBAL_LOCALE);
+        freelocale (locale);
+      }
+  }
+
+  /* Check that gl_locale_name_thread distinguishes different categories of the
+     thread locale, and that the name is the right one for each.  */
+  {
+    unsigned int i;
+
+    for (i = 0; i < SIZEOF (categories); i++)
+      {
+        int category_mask = categories[i].mask;
+        locale_t loc = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", NULL);
+        if (loc != NULL)
+          {
+            locale_t locale = newlocale (category_mask, "de_DE.UTF-8", loc);
+            if (locale == NULL)
+              freelocale (loc);
+            else
+              {
+                unsigned int j;
+
+                uselocale (locale);
+                for (j = 0; j < SIZEOF (categories); j++)
+                  {
+                    const char *name_j =
+                      gl_locale_name_thread (categories[j].cat,
+                                             categories[j].string);
+                    if (j == i)
+                      ASSERT (strcmp (name_j, "de_DE.UTF-8") == 0);
+                    else
+                      ASSERT (strcmp (name_j, "fr_FR.UTF-8") == 0);
+                  }
+                uselocale (LC_GLOBAL_LOCALE);
+                freelocale (locale);
+              }
+          }
+      }
+  }
+
+  /* Check that gl_locale_name_thread returns a string that is allocated with
+     indefinite extent.  */
+  {
+    /* Try many locale names in turn, in order to defeat possible caches.  */
+    static const char * const choices[] =
+      {
+        "C",
+        "POSIX",
+        "af_ZA",
+        "af_ZA.UTF-8",
+        "am_ET",
+        "am_ET.UTF-8",
+        "be_BY",
+        "be_BY.UTF-8",
+        "bg_BG",
+        "bg_BG.UTF-8",
+        "ca_ES",
+        "ca_ES.UTF-8",
+        "cs_CZ",
+        "cs_CZ.UTF-8",
+        "da_DK",
+        "da_DK.UTF-8",
+        "de_AT",
+        "de_AT.UTF-8",
+        "de_CH",
+        "de_CH.UTF-8",
+        "de_DE",
+        "de_DE.UTF-8",
+        "el_GR",
+        "el_GR.UTF-8",
+        "en_AU",
+        "en_AU.UTF-8",
+        "en_CA",
+        "en_CA.UTF-8",
+        "en_GB",
+        "en_GB.UTF-8",
+        "en_IE",
+        "en_IE.UTF-8",
+        "en_NZ",
+        "en_NZ.UTF-8",
+        "en_US",
+        "en_US.UTF-8",
+        "es_ES",
+        "es_ES.UTF-8",
+        "et_EE",
+        "et_EE.UTF-8",
+        "eu_ES",
+        "eu_ES.UTF-8",
+        "fi_FI",
+        "fi_FI.UTF-8",
+        "fr_BE",
+        "fr_BE.UTF-8",
+        "fr_CA",
+        "fr_CA.UTF-8",
+        "fr_CH",
+        "fr_CH.UTF-8",
+        "fr_FR",
+        "fr_FR.UTF-8",
+        "he_IL",
+        "he_IL.UTF-8",
+        "hr_HR",
+        "hr_HR.UTF-8",
+        "hu_HU",
+        "hu_HU.UTF-8",
+        "hy_AM",
+        "is_IS",
+        "is_IS.UTF-8",
+        "it_CH",
+        "it_CH.UTF-8",
+        "it_IT",
+        "it_IT.UTF-8",
+        "ja_JP.UTF-8",
+        "kk_KZ",
+        "kk_KZ.UTF-8",
+        "ko_KR.UTF-8",
+        "lt_LT",
+        "lt_LT.UTF-8",
+        "nl_BE",
+        "nl_BE.UTF-8",
+        "nl_NL",
+        "nl_NL.UTF-8",
+        "no_NO",
+        "no_NO.UTF-8",
+        "pl_PL",
+        "pl_PL.UTF-8",
+        "pt_BR",
+        "pt_BR.UTF-8",
+        "pt_PT",
+        "pt_PT.UTF-8",
+        "ro_RO",
+        "ro_RO.UTF-8",
+        "ru_RU",
+        "ru_RU.UTF-8",
+        "sk_SK",
+        "sk_SK.UTF-8",
+        "sl_SI",
+        "sl_SI.UTF-8",
+        "sv_SE",
+        "sv_SE.UTF-8",
+        "tr_TR",
+        "tr_TR.UTF-8",
+        "uk_UA",
+        "uk_UA.UTF-8",
+        "zh_CN",
+        "zh_CN.UTF-8",
+        "zh_HK",
+        "zh_HK.UTF-8",
+        "zh_TW",
+        "zh_TW.UTF-8"
+      };
+    /* Remember which locales are available.  */
+    unsigned char /* bool */ available[SIZEOF (choices)];
+    /* Array of remembered results of gl_locale_name_thread.  */
+    const char *unsaved_names[SIZEOF (choices)][SIZEOF (categories)];
+    /* Array of remembered results of gl_locale_name_thread, stored in safe
+       memory.  */
+    char *saved_names[SIZEOF (choices)][SIZEOF (categories)];
+    unsigned int j;
+
+    for (j = 0; j < SIZEOF (choices); j++)
+      {
+        locale_t locale = newlocale (LC_ALL_MASK, choices[j], NULL);
+        available[j] = (locale != NULL);
+        if (locale != NULL)
+          {
+            unsigned int i;
+
+            uselocale (locale);
+            for (i = 0; i < SIZEOF (categories); i++)
+              {
+                unsaved_names[j][i] = gl_locale_name_thread (categories[i].cat, categories[i].string);
+                saved_names[j][i] = strdup (unsaved_names[j][i]);
+              }
+            uselocale (LC_GLOBAL_LOCALE);
+            freelocale (locale);
+          }
+      }
+    /* Verify the unsaved_names are still valid.  */
+    for (j = 0; j < SIZEOF (choices); j++)
+      if (available[j])
+        {
+          unsigned int i;
+
+          for (i = 0; i < SIZEOF (categories); i++)
+            ASSERT (strcmp (unsaved_names[j][i], saved_names[j][i]) == 0);
+        }
+    /* Allocate many locales, without freeing them.  This is an attempt at
+       overwriting as much of the previously allocated memory as possible.  */
+    for (j = SIZEOF (choices); j > 0; )
+      {
+        j--;
+        if (available[j])
+          {
+            locale_t locale = newlocale (LC_ALL_MASK, choices[j], NULL);
+            unsigned int i;
+
+            ASSERT (locale != NULL);
+            uselocale (locale);
+            for (i = 0; i < SIZEOF (categories); i++)
+              {
+                const char *name = gl_locale_name_thread (categories[i].cat, categories[i].string);
+                ASSERT (strcmp (unsaved_names[j][i], name) == 0);
+              }
+            uselocale (LC_GLOBAL_LOCALE);
+            freelocale (locale);
+          }
+      }
+    /* Verify the unsaved_names are still valid.  */
+    for (j = 0; j < SIZEOF (choices); j++)
+      if (available[j])
+        {
+          unsigned int i;
+
+          for (i = 0; i < SIZEOF (categories); i++)
+            {
+              ASSERT (strcmp (unsaved_names[j][i], saved_names[j][i]) == 0);
+              free (saved_names[j][i]);
+            }
+        }
+  }
+#else
+  /* Check that gl_locale_name_thread always returns NULL.  */
+  ASSERT (gl_locale_name_thread (LC_CTYPE, "LC_CTYPE") == NULL);
+  ASSERT (gl_locale_name_thread (LC_MESSAGES, "LC_MESSAGES") == NULL);
+#endif
+}
+
+/* Test the gl_locale_name_posix() function.  */
+static void
+test_locale_name_posix (void)
+{
+  const char *ret;
+  const char *name;
+
+  /* Get into a defined state,  */
+  setlocale (LC_ALL, "en_US.UTF-8");
+#if HAVE_GOOD_USELOCALE
+  uselocale (LC_GLOBAL_LOCALE);
+#endif
+
+  /* Check that when all environment variables are unset,
+     gl_locale_name_posix returns either NULL or the default locale.  */
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LC_NUMERIC");
+  unsetenv ("LANG");
+  /* Need also to unset all environment variables that specify standard or
+     non-standard locale categories.  Otherwise, on glibc systems, when some
+     of these variables are set and reference a nonexistent locale, the
+     setlocale (LC_ALL, "") call below would fail.  */
+  unsetenv ("LC_COLLATE");
+  unsetenv ("LC_MONETARY");
+  unsetenv ("LC_TIME");
+  unsetenv ("LC_ADDRESS");
+  unsetenv ("LC_IDENTIFICATION");
+  unsetenv ("LC_MEASUREMENT");
+  unsetenv ("LC_NAME");
+  unsetenv ("LC_PAPER");
+  unsetenv ("LC_TELEPHONE");
+  ret = setlocale (LC_ALL, "");
+  ASSERT (ret != NULL);
+  name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (name == NULL || strcmp (name, gl_locale_name_default ()) == 0);
+  name = gl_locale_name_posix (LC_NUMERIC, "LC_NUMERIC");
+  ASSERT (name == NULL || strcmp (name, gl_locale_name_default ()) == 0);
+
+  /* Check that an empty environment variable is treated like an unset
+     environment variable.  */
+
+  setenv ("LC_ALL", "", 1);
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (name == NULL || strcmp (name, gl_locale_name_default ()) == 0);
+
+  unsetenv ("LC_ALL");
+  setenv ("LC_CTYPE", "", 1);
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (name == NULL || strcmp (name, gl_locale_name_default ()) == 0);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "", 1);
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (name == NULL || strcmp (name, gl_locale_name_default ()) == 0);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  setenv ("LANG", "", 1);
+  setlocale (LC_ALL, "");
+  name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (name == NULL || strcmp (name, gl_locale_name_default ()) == 0);
+
+  /* Check that LC_ALL overrides the others, and LANG is overridden by the
+     others.  */
+
+  setenv ("LC_ALL", "C", 1);
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (strcmp (name, "C") == 0);
+
+  unsetenv ("LC_ALL");
+  setenv ("LC_CTYPE", "C", 1);
+  setenv ("LC_MESSAGES", "C", 1);
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (strcmp (name, "C") == 0);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  setenv ("LANG", "C", 1);
+  setlocale (LC_ALL, "");
+  name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (strcmp (name, "C") == 0);
+
+  /* Check mixed situations.  */
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "fr_FR.UTF-8", 1);
+  setenv ("LANG", "de_DE.UTF-8", 1);
+  if (setlocale (LC_ALL, "") != NULL)
+    {
+      name = gl_locale_name_posix (LC_CTYPE, "LC_CTYPE");
+#if defined _WIN32 && !defined __CYGWIN__
+      ASSERT (strcmp (name, "de_DE") == 0 || strcmp (name, "de_DE.UTF-8") == 0);
+#else
+      ASSERT (strcmp (name, "de_DE.UTF-8") == 0);
+#endif
+      name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+      ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+    }
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "fr_FR.UTF-8", 1);
+  unsetenv ("LANG");
+  if (setlocale (LC_ALL, "") != NULL)
+    {
+      name = gl_locale_name_posix (LC_CTYPE, "LC_CTYPE");
+      ASSERT (name == NULL || strcmp (name, gl_locale_name_default ()) == 0);
+      name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+      ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+    }
+
+#if HAVE_GOOD_USELOCALE
+  /* Check that gl_locale_name_posix ignores the thread locale.  */
+  {
+    locale_t locale = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", NULL);
+    if (locale != NULL)
+      {
+        unsetenv ("LC_ALL");
+        unsetenv ("LC_CTYPE");
+        unsetenv ("LC_MESSAGES");
+        setenv ("LANG", "C", 1);
+        setlocale (LC_ALL, "");
+        uselocale (locale);
+        name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+        ASSERT (strcmp (name, "C") == 0);
+        uselocale (LC_GLOBAL_LOCALE);
+        freelocale (locale);
+      }
+  }
+#endif
+}
+
+/* Test the gl_locale_name_environ() function.  */
+static void
+test_locale_name_environ (void)
+{
+  const char *name;
+
+  /* Get into a defined state,  */
+  setlocale (LC_ALL, "en_US.UTF-8");
+#if HAVE_GOOD_USELOCALE
+  uselocale (LC_GLOBAL_LOCALE);
+#endif
+
+  /* Check that when all environment variables are unset,
+     gl_locale_name_environ returns NULL.  */
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LC_NUMERIC");
+  unsetenv ("LANG");
+  ASSERT (gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES") == NULL);
+  ASSERT (gl_locale_name_environ (LC_NUMERIC, "LC_NUMERIC") == NULL);
+
+  /* Check that an empty environment variable is treated like an unset
+     environment variable.  */
+
+  setenv ("LC_ALL", "", 1);
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  ASSERT (gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES") == NULL);
+
+  unsetenv ("LC_ALL");
+  setenv ("LC_CTYPE", "", 1);
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  ASSERT (gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES") == NULL);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "", 1);
+  unsetenv ("LANG");
+  ASSERT (gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES") == NULL);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  setenv ("LANG", "", 1);
+  ASSERT (gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES") == NULL);
+
+  /* Check that LC_ALL overrides the others, and LANG is overridden by the
+     others.  */
+
+  setenv ("LC_ALL", "C", 1);
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  name = gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (strcmp (name, "C") == 0);
+
+  unsetenv ("LC_ALL");
+  setenv ("LC_CTYPE", "C", 1);
+  setenv ("LC_MESSAGES", "C", 1);
+  unsetenv ("LANG");
+  name = gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (strcmp (name, "C") == 0);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  setenv ("LANG", "C", 1);
+  name = gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (strcmp (name, "C") == 0);
+
+  /* Check mixed situations.  */
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "fr_FR.UTF-8", 1);
+  setenv ("LANG", "de_DE.UTF-8", 1);
+  name = gl_locale_name_environ (LC_CTYPE, "LC_CTYPE");
+  ASSERT (strcmp (name, "de_DE.UTF-8") == 0);
+  name = gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "fr_FR.UTF-8", 1);
+  unsetenv ("LANG");
+  name = gl_locale_name_environ (LC_CTYPE, "LC_CTYPE");
+  ASSERT (name == NULL);
+  name = gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+
+#if HAVE_GOOD_USELOCALE
+  /* Check that gl_locale_name_environ ignores the thread locale.  */
+  {
+    locale_t locale = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", NULL);
+    if (locale != NULL)
+      {
+        unsetenv ("LC_ALL");
+        unsetenv ("LC_CTYPE");
+        unsetenv ("LC_MESSAGES");
+        setenv ("LANG", "C", 1);
+        setlocale (LC_ALL, "");
+        uselocale (locale);
+        name = gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES");
+        ASSERT (strcmp (name, "C") == 0);
+        uselocale (LC_GLOBAL_LOCALE);
+        freelocale (locale);
+      }
+  }
+#endif
+}
+
+/* Test the gl_locale_name_default() function.  */
+static void
+test_locale_name_default (void)
+{
+  const char *name = gl_locale_name_default ();
+
+  ASSERT (name != NULL);
+
+  /* Only Mac OS X and Windows have a facility for the user to set the default
+     locale.  */
+#if !((defined __APPLE__ && defined __MACH__) || (defined _WIN32 || defined __CYGWIN__))
+  ASSERT (strcmp (name, "C") == 0);
+#endif
+
+#if HAVE_GOOD_USELOCALE
+  /* Check that gl_locale_name_default ignores the thread locale.  */
+  {
+    locale_t locale = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", NULL);
+    if (locale != NULL)
+      {
+        uselocale (locale);
+        ASSERT (strcmp (gl_locale_name_default (), name) == 0);
+        uselocale (LC_GLOBAL_LOCALE);
+        freelocale (locale);
+      }
+  }
+#endif
+}
+
+int
+main ()
+{
+  test_locale_name ();
+  test_locale_name_thread ();
+  test_locale_name_posix ();
+  test_locale_name_environ ();
+  test_locale_name_default ();
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-lseek.c b/src/grep/gnulib-tests/test-lseek.c
new file mode 100644
index 0000000..9f531d8
--- /dev/null
+++ b/src/grep/gnulib-tests/test-lseek.c
@@ -0,0 +1,109 @@
+/* Test of lseek() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake, 2007.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (lseek, off_t, (int, off_t, int));
+
+#include <errno.h>
+
+#include "macros.h"
+
+/* ARGC must be 2; *ARGV[1] is '0' if stdin and stdout are files, '1'
+   if they are pipes, and '2' if they are closed.  Check for proper
+   semantics of lseek.  */
+int
+main (int argc, char **argv)
+{
+  if (argc != 2)
+    return 2;
+  switch (*argv[1])
+    {
+    case '0': /* regular files */
+      ASSERT (lseek (0, (off_t)2, SEEK_SET) == 2);
+      ASSERT (lseek (0, (off_t)-4, SEEK_CUR) == -1);
+      ASSERT (errno == EINVAL);
+      errno = 0;
+#if ! defined __BEOS__
+      /* POSIX says that the last lseek call, when failing, does not change
+         the current offset.  But BeOS sets it to 0.  */
+      ASSERT (lseek (0, (off_t)0, SEEK_CUR) == 2);
+#endif
+#if 0 /* leads to SIGSYS on IRIX 6.5 */
+      ASSERT (lseek (0, (off_t)0, (SEEK_SET | SEEK_CUR | SEEK_END) + 1) == -1);
+      ASSERT (errno == EINVAL);
+#endif
+      ASSERT (lseek (1, (off_t)2, SEEK_SET) == 2);
+      errno = 0;
+      ASSERT (lseek (1, (off_t)-4, SEEK_CUR) == -1);
+      ASSERT (errno == EINVAL);
+      errno = 0;
+#if ! defined __BEOS__
+      /* POSIX says that the last lseek call, when failing, does not change
+         the current offset.  But BeOS sets it to 0.  */
+      ASSERT (lseek (1, (off_t)0, SEEK_CUR) == 2);
+#endif
+#if 0 /* leads to SIGSYS on IRIX 6.5 */
+      ASSERT (lseek (1, (off_t)0, (SEEK_SET | SEEK_CUR | SEEK_END) + 1) == -1);
+      ASSERT (errno == EINVAL);
+#endif
+      break;
+
+    case '1': /* pipes */
+      errno = 0;
+      ASSERT (lseek (0, (off_t)0, SEEK_CUR) == -1);
+      ASSERT (errno == ESPIPE);
+      errno = 0;
+      ASSERT (lseek (1, (off_t)0, SEEK_CUR) == -1);
+      ASSERT (errno == ESPIPE);
+      break;
+
+    case '2': /* closed */
+      /* Explicitly close file descriptors 0 and 1.  The <&- and >&- in the
+         invoking shell are not enough on HP-UX.  */
+      close (0);
+      close (1);
+
+      errno = 0;
+      ASSERT (lseek (0, (off_t)0, SEEK_CUR) == -1);
+      ASSERT (errno == EBADF);
+
+      errno = 0;
+      ASSERT (lseek (1, (off_t)0, SEEK_CUR) == -1);
+      ASSERT (errno == EBADF);
+
+      /* Test behaviour for invalid file descriptors.  */
+      errno = 0;
+      ASSERT (lseek (-1, (off_t)0, SEEK_CUR) == -1);
+      ASSERT (errno == EBADF);
+
+      close (99);
+      errno = 0;
+      ASSERT (lseek (99, (off_t)0, SEEK_CUR) == -1);
+      ASSERT (errno == EBADF);
+
+      break;
+
+    default:
+      return 1;
+    }
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-lseek.sh b/src/grep/gnulib-tests/test-lseek.sh
new file mode 100755
index 0000000..ff206c6
--- /dev/null
+++ b/src/grep/gnulib-tests/test-lseek.sh
@@ -0,0 +1,18 @@
+#!/bin/sh
+
+tmpfiles=
+trap 'rm -fr $tmpfiles' 1 2 3 15
+
+tmpfiles=t-lseek.tmp
+# seekable files
+${CHECKER} ./test-lseek${EXEEXT} 0 < "$srcdir/test-lseek.sh" > t-lseek.tmp || exit 1
+
+# pipes
+echo hi | { ${CHECKER} ./test-lseek${EXEEXT} 1; echo $? > t-lseek.tmp; cat > /dev/null; } | cat
+test "`cat t-lseek.tmp`" = "0" || exit 1
+
+# closed descriptors
+${CHECKER} ./test-lseek${EXEEXT} 2 <&- >&- || exit 1
+
+rm -rf $tmpfiles
+exit 0
diff --git a/src/grep/gnulib-tests/test-lstat.c b/src/grep/gnulib-tests/test-lstat.c
new file mode 100644
index 0000000..b8481fb
--- /dev/null
+++ b/src/grep/gnulib-tests/test-lstat.c
@@ -0,0 +1,60 @@
+/* Test of lstat() function.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Simon Josefsson, 2008; and Eric Blake, 2009.  */
+
+#include <config.h>
+
+#include <sys/stat.h>
+
+/* Caution: lstat may be a function-like macro.  Although this
+   signature check must pass, it may be the signature of the real (and
+   broken) lstat rather than rpl_lstat.  Most code should not use the
+   address of lstat.  */
+#include "signature.h"
+SIGNATURE_CHECK (lstat, int, (char const *, struct stat *));
+
+#include <fcntl.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "same-inode.h"
+#include "ignore-value.h"
+#include "macros.h"
+
+#define BASE "test-lstat.t"
+
+#include "test-lstat.h"
+
+/* Wrapper around lstat, which works even if lstat is a function-like
+   macro, where test_lstat_func(lstat) would do the wrong thing.  */
+static int
+do_lstat (char const *name, struct stat *st)
+{
+  return lstat (name, st);
+}
+
+int
+main (void)
+{
+  /* Remove any leftovers from a previous partial run.  */
+  ignore_value (system ("rm -rf " BASE "*"));
+
+  return test_lstat_func (do_lstat, true);
+}
diff --git a/src/grep/gnulib-tests/test-lstat.h b/src/grep/gnulib-tests/test-lstat.h
new file mode 100644
index 0000000..08803da
--- /dev/null
+++ b/src/grep/gnulib-tests/test-lstat.h
@@ -0,0 +1,122 @@
+/* Test of lstat() function.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Simon Josefsson, 2008; and Eric Blake, 2009.  */
+
+/* This file is designed to test both lstat(n,buf) and
+   fstatat(AT_FDCWD,n,buf,AT_SYMLINK_NOFOLLOW).  FUNC is the function
+   to test.  Assumes that BASE and ASSERT are already defined, and
+   that appropriate headers are already included.  If PRINT, warn
+   before skipping symlink tests with status 77.  */
+
+static int
+test_lstat_func (int (*func) (char const *, struct stat *), bool print)
+{
+  struct stat st1;
+  struct stat st2;
+
+  /* Test for common directories.  */
+  ASSERT (func (".", &st1) == 0);
+  ASSERT (func ("./", &st2) == 0);
+#if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
+  ASSERT (SAME_INODE (st1, st2));
+#endif
+  ASSERT (S_ISDIR (st1.st_mode));
+  ASSERT (S_ISDIR (st2.st_mode));
+  ASSERT (func ("/", &st1) == 0);
+  ASSERT (func ("///", &st2) == 0);
+#if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
+  ASSERT (SAME_INODE (st1, st2));
+#endif
+  ASSERT (S_ISDIR (st1.st_mode));
+  ASSERT (S_ISDIR (st2.st_mode));
+  ASSERT (func ("..", &st1) == 0);
+  ASSERT (S_ISDIR (st1.st_mode));
+
+  /* Test for error conditions.  */
+  errno = 0;
+  ASSERT (func ("", &st1) == -1);
+  ASSERT (errno == ENOENT);
+  errno = 0;
+  ASSERT (func ("nosuch", &st1) == -1);
+  ASSERT (errno == ENOENT);
+  errno = 0;
+  ASSERT (func ("nosuch/", &st1) == -1);
+  ASSERT (errno == ENOENT);
+
+  ASSERT (close (creat (BASE "file", 0600)) == 0);
+  ASSERT (func (BASE "file", &st1) == 0);
+  ASSERT (S_ISREG (st1.st_mode));
+  errno = 0;
+  ASSERT (func (BASE "file/", &st1) == -1);
+  ASSERT (errno == ENOTDIR);
+
+  /* Now for some symlink tests, where supported.  We set up:
+     link1 -> directory
+     link2 -> file
+     link3 -> dangling
+     link4 -> loop
+     then test behavior both with and without trailing slash.
+  */
+  if (symlink (".", BASE "link1") != 0)
+    {
+      ASSERT (unlink (BASE "file") == 0);
+      if (print)
+        fputs ("skipping test: symlinks not supported on this file system\n",
+               stderr);
+      return 77;
+    }
+  ASSERT (symlink (BASE "file", BASE "link2") == 0);
+  ASSERT (symlink (BASE "nosuch", BASE "link3") == 0);
+  ASSERT (symlink (BASE "link4", BASE "link4") == 0);
+
+  ASSERT (func (BASE "link1", &st1) == 0);
+  ASSERT (S_ISLNK (st1.st_mode));
+  ASSERT (func (BASE "link1/", &st1) == 0);
+  ASSERT (stat (BASE "link1", &st2) == 0);
+  ASSERT (S_ISDIR (st1.st_mode));
+  ASSERT (S_ISDIR (st2.st_mode));
+#if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
+  ASSERT (SAME_INODE (st1, st2));
+#endif
+
+  ASSERT (func (BASE "link2", &st1) == 0);
+  ASSERT (S_ISLNK (st1.st_mode));
+  errno = 0;
+  ASSERT (func (BASE "link2/", &st1) == -1);
+  ASSERT (errno == ENOTDIR);
+
+  ASSERT (func (BASE "link3", &st1) == 0);
+  ASSERT (S_ISLNK (st1.st_mode));
+  errno = 0;
+  ASSERT (func (BASE "link3/", &st1) == -1);
+  ASSERT (errno == ENOENT);
+
+  ASSERT (func (BASE "link4", &st1) == 0);
+  ASSERT (S_ISLNK (st1.st_mode));
+  errno = 0;
+  ASSERT (func (BASE "link4/", &st1) == -1);
+  ASSERT (errno == ELOOP);
+
+  /* Cleanup.  */
+  ASSERT (unlink (BASE "file") == 0);
+  ASSERT (unlink (BASE "link1") == 0);
+  ASSERT (unlink (BASE "link2") == 0);
+  ASSERT (unlink (BASE "link3") == 0);
+  ASSERT (unlink (BASE "link4") == 0);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-malloc-gnu.c b/src/grep/gnulib-tests/test-malloc-gnu.c
new file mode 100644
index 0000000..0160c6c
--- /dev/null
+++ b/src/grep/gnulib-tests/test-malloc-gnu.c
@@ -0,0 +1,45 @@
+/* Test of malloc function.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include <errno.h>
+#include <stdint.h>
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  /* Check that malloc (0) is not a NULL pointer.  */
+  void *volatile p = malloc (0);
+  ASSERT (p != NULL);
+  free (p);
+
+  /* Check that malloc (n) fails when n exceeds PTRDIFF_MAX.  */
+  if (PTRDIFF_MAX < SIZE_MAX)
+    {
+      size_t one = argc != 12345;
+      p = malloc (PTRDIFF_MAX + one);
+      ASSERT (p == NULL);
+      ASSERT (errno == ENOMEM);
+    }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-malloca.c b/src/grep/gnulib-tests/test-malloca.c
new file mode 100644
index 0000000..52d95a5
--- /dev/null
+++ b/src/grep/gnulib-tests/test-malloca.c
@@ -0,0 +1,62 @@
+/* Test of safe automatic memory allocation.
+   Copyright (C) 2005, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.  */
+
+#include <config.h>
+
+#include "malloca.h"
+
+#include <stdlib.h>
+
+static void
+do_allocation (int n)
+{
+  void *volatile ptr = malloca (n);
+  freea (ptr);
+  safe_alloca (n);
+}
+
+void (*func) (int) = do_allocation;
+
+int
+main ()
+{
+  int i;
+
+  /* This slows down malloc a lot.  */
+  unsetenv ("MALLOC_PERTURB_");
+
+  /* Repeat a lot of times, to make sure there's no memory leak.  */
+  for (i = 0; i < 50000; i++)
+    {
+      /* Try various values.
+         n = 0 gave a crash on Alpha with gcc-2.5.8.
+         Some versions of Mac OS X have a stack size limit of 512 KB.  */
+      func (34);
+      func (134);
+      func (399);
+      func (510823);
+      func (129321);
+      func (0);
+      func (4070);
+      func (4095);
+      func (1);
+      func (16582);
+    }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-mbscasecmp.c b/src/grep/gnulib-tests/test-mbscasecmp.c
new file mode 100644
index 0000000..c1b5c8f
--- /dev/null
+++ b/src/grep/gnulib-tests/test-mbscasecmp.c
@@ -0,0 +1,55 @@
+/* Test of case-insensitive string comparison function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include <locale.h>
+
+#include "macros.h"
+
+int
+main ()
+{
+  /* configure should already have checked that the locale is supported.  */
+  if (setlocale (LC_ALL, "") == NULL)
+    return 1;
+
+  ASSERT (mbscasecmp ("paragraph", "Paragraph") == 0);
+
+  ASSERT (mbscasecmp ("paragrapH", "parAgRaph") == 0);
+
+  ASSERT (mbscasecmp ("paragraph", "paraLyzed") < 0);
+  ASSERT (mbscasecmp ("paraLyzed", "paragraph") > 0);
+
+  ASSERT (mbscasecmp ("para", "paragraph") < 0);
+  ASSERT (mbscasecmp ("paragraph", "para") > 0);
+
+  /* The following tests shows how mbscasecmp() is different from
+     strcasecmp().  */
+
+  ASSERT (mbscasecmp ("\303\266zg\303\274r", "\303\226ZG\303\234R") == 0); /* özgür */
+  ASSERT (mbscasecmp ("\303\226ZG\303\234R", "\303\266zg\303\274r") == 0); /* özgür */
+
+  /* This test shows how strings of different size can compare equal.  */
+  ASSERT (mbscasecmp ("turkish", "TURK\304\260SH") == 0);
+  ASSERT (mbscasecmp ("TURK\304\260SH", "turkish") == 0);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-mbscasecmp.sh b/src/grep/gnulib-tests/test-mbscasecmp.sh
new file mode 100755
index 0000000..5201951
--- /dev/null
+++ b/src/grep/gnulib-tests/test-mbscasecmp.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Test whether a specific Turkish locale is installed.
+: ${LOCALE_TR_UTF8=tr_TR.UTF-8}
+if test $LOCALE_TR_UTF8 = none; then
+  if test -f /usr/bin/localedef; then
+    echo "Skipping test: no turkish Unicode locale is installed"
+  else
+    echo "Skipping test: no turkish Unicode locale is supported"
+  fi
+  exit 77
+fi
+
+LC_ALL=$LOCALE_TR_UTF8 \
+${CHECKER} ./test-mbscasecmp${EXEEXT}
diff --git a/src/grep/gnulib-tests/test-mbsinit.c b/src/grep/gnulib-tests/test-mbsinit.c
new file mode 100644
index 0000000..bda3a3b
--- /dev/null
+++ b/src/grep/gnulib-tests/test-mbsinit.c
@@ -0,0 +1,55 @@
+/* Test of test for initial conversion state.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include <wchar.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (mbsinit, int, (const mbstate_t *));
+
+#include <locale.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  static mbstate_t state;
+
+  ASSERT (mbsinit (NULL));
+
+  ASSERT (mbsinit (&state));
+
+  if (argc > 1)
+    {
+      static const char input[1] = "\303";
+      wchar_t wc;
+      size_t ret;
+
+      /* configure should already have checked that the locale is supported.  */
+      if (setlocale (LC_ALL, "") == NULL)
+        return 1;
+
+      ret = mbrtowc (&wc, input, 1, &state);
+      ASSERT (ret == (size_t)(-2));
+      ASSERT (!mbsinit (&state));
+    }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-mbsinit.sh b/src/grep/gnulib-tests/test-mbsinit.sh
new file mode 100755
index 0000000..7308714
--- /dev/null
+++ b/src/grep/gnulib-tests/test-mbsinit.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Test whether a specific UTF-8 locale is installed.
+: ${LOCALE_FR_UTF8=fr_FR.UTF-8}
+if test $LOCALE_FR_UTF8 = none; then
+  if test -f /usr/bin/localedef; then
+    echo "Skipping test: no french Unicode locale is installed"
+  else
+    echo "Skipping test: no french Unicode locale is supported"
+  fi
+  exit 77
+fi
+
+LC_ALL=$LOCALE_FR_UTF8 \
+${CHECKER} ./test-mbsinit${EXEEXT}
diff --git a/src/grep/gnulib-tests/test-mbsrtowcs.c b/src/grep/gnulib-tests/test-mbsrtowcs.c
new file mode 100644
index 0000000..1489978
--- /dev/null
+++ b/src/grep/gnulib-tests/test-mbsrtowcs.c
@@ -0,0 +1,293 @@
+/* Test of conversion of string to wide string.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include <wchar.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (mbsrtowcs, size_t, (wchar_t *, char const **, size_t,
+                                     mbstate_t *));
+
+#include <locale.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  mbstate_t state;
+  wchar_t wc;
+  size_t ret;
+
+  /* configure should already have checked that the locale is supported.  */
+  if (setlocale (LC_ALL, "") == NULL)
+    return 1;
+
+  /* Test NUL byte input.  */
+  {
+    const char *src;
+
+    memset (&state, '\0', sizeof (mbstate_t));
+
+    src = "";
+    ret = mbsrtowcs (NULL, &src, 0, &state);
+    ASSERT (ret == 0);
+    ASSERT (mbsinit (&state));
+
+    src = "";
+    ret = mbsrtowcs (NULL, &src, 1, &state);
+    ASSERT (ret == 0);
+    ASSERT (mbsinit (&state));
+
+    wc = (wchar_t) 0xBADFACE;
+    src = "";
+    ret = mbsrtowcs (&wc, &src, 0, &state);
+    ASSERT (ret == 0);
+    ASSERT (wc == (wchar_t) 0xBADFACE);
+    ASSERT (mbsinit (&state));
+
+    wc = (wchar_t) 0xBADFACE;
+    src = "";
+    ret = mbsrtowcs (&wc, &src, 1, &state);
+    ASSERT (ret == 0);
+    ASSERT (wc == 0);
+    ASSERT (mbsinit (&state));
+  }
+
+  if (argc > 1)
+    {
+      int unlimited;
+
+      for (unlimited = 0; unlimited < 2; unlimited++)
+        {
+          #define BUFSIZE 10
+          wchar_t buf[BUFSIZE];
+          const char *src;
+          mbstate_t temp_state;
+
+          {
+            size_t i;
+            for (i = 0; i < BUFSIZE; i++)
+              buf[i] = (wchar_t) 0xBADFACE;
+          }
+
+          switch (argv[1][0])
+            {
+            case '1':
+              /* Locale encoding is ISO-8859-1 or ISO-8859-15.  */
+              {
+                char input[] = "B\374\337er"; /* "Büßer" */
+                memset (&state, '\0', sizeof (mbstate_t));
+
+                wc = (wchar_t) 0xBADFACE;
+                ret = mbrtowc (&wc, input, 1, &state);
+                ASSERT (ret == 1);
+                ASSERT (wc == 'B');
+                ASSERT (mbsinit (&state));
+                input[0] = '\0';
+
+                wc = (wchar_t) 0xBADFACE;
+                ret = mbrtowc (&wc, input + 1, 1, &state);
+                ASSERT (ret == 1);
+                ASSERT (wctob (wc) == (unsigned char) '\374');
+                ASSERT (mbsinit (&state));
+                input[1] = '\0';
+
+                src = input + 2;
+                temp_state = state;
+                ret = mbsrtowcs (NULL, &src, unlimited ? BUFSIZE : 1, &temp_state);
+                ASSERT (ret == 3);
+                ASSERT (src == input + 2);
+                ASSERT (mbsinit (&state));
+
+                src = input + 2;
+                ret = mbsrtowcs (buf, &src, unlimited ? BUFSIZE : 1, &state);
+                ASSERT (ret == (unlimited ? 3 : 1));
+                ASSERT (src == (unlimited ? NULL : input + 3));
+                ASSERT (wctob (buf[0]) == (unsigned char) '\337');
+                if (unlimited)
+                  {
+                    ASSERT (buf[1] == 'e');
+                    ASSERT (buf[2] == 'r');
+                    ASSERT (buf[3] == 0);
+                    ASSERT (buf[4] == (wchar_t) 0xBADFACE);
+                  }
+                else
+                  ASSERT (buf[1] == (wchar_t) 0xBADFACE);
+                ASSERT (mbsinit (&state));
+              }
+              break;
+
+            case '2':
+              /* Locale encoding is UTF-8.  */
+              {
+                char input[] = "B\303\274\303\237er"; /* "Büßer" */
+                memset (&state, '\0', sizeof (mbstate_t));
+
+                wc = (wchar_t) 0xBADFACE;
+                ret = mbrtowc (&wc, input, 1, &state);
+                ASSERT (ret == 1);
+                ASSERT (wc == 'B');
+                ASSERT (mbsinit (&state));
+                input[0] = '\0';
+
+                wc = (wchar_t) 0xBADFACE;
+                ret = mbrtowc (&wc, input + 1, 1, &state);
+                ASSERT (ret == (size_t)(-2));
+                ASSERT (wc == (wchar_t) 0xBADFACE);
+                ASSERT (!mbsinit (&state));
+                input[1] = '\0';
+
+                src = input + 2;
+                temp_state = state;
+                ret = mbsrtowcs (NULL, &src, unlimited ? BUFSIZE : 2, &temp_state);
+                ASSERT (ret == 4);
+                ASSERT (src == input + 2);
+                ASSERT (!mbsinit (&state));
+
+                src = input + 2;
+                ret = mbsrtowcs (buf, &src, unlimited ? BUFSIZE : 2, &state);
+                ASSERT (ret == (unlimited ? 4 : 2));
+                ASSERT (src == (unlimited ? NULL : input + 5));
+                ASSERT (wctob (buf[0]) == EOF);
+                ASSERT (wctob (buf[1]) == EOF);
+                if (unlimited)
+                  {
+                    ASSERT (buf[2] == 'e');
+                    ASSERT (buf[3] == 'r');
+                    ASSERT (buf[4] == 0);
+                    ASSERT (buf[5] == (wchar_t) 0xBADFACE);
+                  }
+                else
+                  ASSERT (buf[2] == (wchar_t) 0xBADFACE);
+                ASSERT (mbsinit (&state));
+              }
+              break;
+
+            case '3':
+              /* Locale encoding is EUC-JP.  */
+              {
+                char input[] = "<\306\374\313\334\270\354>"; /* "<日本語>" */
+                memset (&state, '\0', sizeof (mbstate_t));
+
+                wc = (wchar_t) 0xBADFACE;
+                ret = mbrtowc (&wc, input, 1, &state);
+                ASSERT (ret == 1);
+                ASSERT (wc == '<');
+                ASSERT (mbsinit (&state));
+                input[0] = '\0';
+
+                wc = (wchar_t) 0xBADFACE;
+                ret = mbrtowc (&wc, input + 1, 2, &state);
+                ASSERT (ret == 2);
+                ASSERT (wctob (wc) == EOF);
+                ASSERT (mbsinit (&state));
+                input[1] = '\0';
+                input[2] = '\0';
+
+                wc = (wchar_t) 0xBADFACE;
+                ret = mbrtowc (&wc, input + 3, 1, &state);
+                ASSERT (ret == (size_t)(-2));
+                ASSERT (wc == (wchar_t) 0xBADFACE);
+                ASSERT (!mbsinit (&state));
+                input[3] = '\0';
+
+                src = input + 4;
+                temp_state = state;
+                ret = mbsrtowcs (NULL, &src, unlimited ? BUFSIZE : 2, &temp_state);
+                ASSERT (ret == 3);
+                ASSERT (src == input + 4);
+                ASSERT (!mbsinit (&state));
+
+                src = input + 4;
+                ret = mbsrtowcs (buf, &src, unlimited ? BUFSIZE : 2, &state);
+                ASSERT (ret == (unlimited ? 3 : 2));
+                ASSERT (src == (unlimited ? NULL : input + 7));
+                ASSERT (wctob (buf[0]) == EOF);
+                ASSERT (wctob (buf[1]) == EOF);
+                if (unlimited)
+                  {
+                    ASSERT (buf[2] == '>');
+                    ASSERT (buf[3] == 0);
+                    ASSERT (buf[4] == (wchar_t) 0xBADFACE);
+                  }
+                else
+                  ASSERT (buf[2] == (wchar_t) 0xBADFACE);
+                ASSERT (mbsinit (&state));
+              }
+              break;
+
+            case '4':
+              /* Locale encoding is GB18030.  */
+              {
+                char input[] = "B\250\271\201\060\211\070er"; /* "Büßer" */
+                memset (&state, '\0', sizeof (mbstate_t));
+
+                wc = (wchar_t) 0xBADFACE;
+                ret = mbrtowc (&wc, input, 1, &state);
+                ASSERT (ret == 1);
+                ASSERT (wc == 'B');
+                ASSERT (mbsinit (&state));
+                input[0] = '\0';
+
+                wc = (wchar_t) 0xBADFACE;
+                ret = mbrtowc (&wc, input + 1, 1, &state);
+                ASSERT (ret == (size_t)(-2));
+                ASSERT (wc == (wchar_t) 0xBADFACE);
+                ASSERT (!mbsinit (&state));
+                input[1] = '\0';
+
+                src = input + 2;
+                temp_state = state;
+                ret = mbsrtowcs (NULL, &src, unlimited ? BUFSIZE : 2, &temp_state);
+                ASSERT (ret == 4);
+                ASSERT (src == input + 2);
+                ASSERT (!mbsinit (&state));
+
+                src = input + 2;
+                ret = mbsrtowcs (buf, &src, unlimited ? BUFSIZE : 2, &state);
+                ASSERT (ret == (unlimited ? 4 : 2));
+                ASSERT (src == (unlimited ? NULL : input + 7));
+                ASSERT (wctob (buf[0]) == EOF);
+                ASSERT (wctob (buf[1]) == EOF);
+                if (unlimited)
+                  {
+                    ASSERT (buf[2] == 'e');
+                    ASSERT (buf[3] == 'r');
+                    ASSERT (buf[4] == 0);
+                    ASSERT (buf[5] == (wchar_t) 0xBADFACE);
+                  }
+                else
+                  ASSERT (buf[2] == (wchar_t) 0xBADFACE);
+                ASSERT (mbsinit (&state));
+              }
+              break;
+
+            default:
+              return 1;
+            }
+        }
+
+      return 0;
+    }
+
+  return 1;
+}
diff --git a/src/grep/gnulib-tests/test-mbsrtowcs1.sh b/src/grep/gnulib-tests/test-mbsrtowcs1.sh
new file mode 100755
index 0000000..66ba231
--- /dev/null
+++ b/src/grep/gnulib-tests/test-mbsrtowcs1.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Test in an ISO-8859-1 or ISO-8859-15 locale.
+: ${LOCALE_FR=fr_FR}
+if test $LOCALE_FR = none; then
+  if test -f /usr/bin/localedef; then
+    echo "Skipping test: no traditional french locale is installed"
+  else
+    echo "Skipping test: no traditional french locale is supported"
+  fi
+  exit 77
+fi
+
+LC_ALL=$LOCALE_FR \
+${CHECKER} ./test-mbsrtowcs${EXEEXT} 1
diff --git a/src/grep/gnulib-tests/test-mbsrtowcs2.sh b/src/grep/gnulib-tests/test-mbsrtowcs2.sh
new file mode 100755
index 0000000..6786efd
--- /dev/null
+++ b/src/grep/gnulib-tests/test-mbsrtowcs2.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Test whether a specific UTF-8 locale is installed.
+: ${LOCALE_FR_UTF8=fr_FR.UTF-8}
+if test $LOCALE_FR_UTF8 = none; then
+  if test -f /usr/bin/localedef; then
+    echo "Skipping test: no french Unicode locale is installed"
+  else
+    echo "Skipping test: no french Unicode locale is supported"
+  fi
+  exit 77
+fi
+
+LC_ALL=$LOCALE_FR_UTF8 \
+${CHECKER} ./test-mbsrtowcs${EXEEXT} 2
diff --git a/src/grep/gnulib-tests/test-mbsrtowcs3.sh b/src/grep/gnulib-tests/test-mbsrtowcs3.sh
new file mode 100755
index 0000000..54e9832
--- /dev/null
+++ b/src/grep/gnulib-tests/test-mbsrtowcs3.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Test whether a specific EUC-JP locale is installed.
+: ${LOCALE_JA=ja_JP}
+if test $LOCALE_JA = none; then
+  if test -f /usr/bin/localedef; then
+    echo "Skipping test: no traditional japanese locale is installed"
+  else
+    echo "Skipping test: no traditional japanese locale is supported"
+  fi
+  exit 77
+fi
+
+LC_ALL=$LOCALE_JA \
+${CHECKER} ./test-mbsrtowcs${EXEEXT} 3
diff --git a/src/grep/gnulib-tests/test-mbsrtowcs4.sh b/src/grep/gnulib-tests/test-mbsrtowcs4.sh
new file mode 100755
index 0000000..8acda08
--- /dev/null
+++ b/src/grep/gnulib-tests/test-mbsrtowcs4.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Test whether a specific GB18030 locale is installed.
+: ${LOCALE_ZH_CN=zh_CN.GB18030}
+if test $LOCALE_ZH_CN = none; then
+  if test -f /usr/bin/localedef; then
+    echo "Skipping test: no transitional chinese locale is installed"
+  else
+    echo "Skipping test: no transitional chinese locale is supported"
+  fi
+  exit 77
+fi
+
+LC_ALL=$LOCALE_ZH_CN \
+${CHECKER} ./test-mbsrtowcs${EXEEXT} 4
diff --git a/src/grep/gnulib-tests/test-mbsstr1.c b/src/grep/gnulib-tests/test-mbsstr1.c
new file mode 100644
index 0000000..a34cfe6
--- /dev/null
+++ b/src/grep/gnulib-tests/test-mbsstr1.c
@@ -0,0 +1,128 @@
+/* Test of searching in a string.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include <stdlib.h>
+
+#include "macros.h"
+
+int
+main ()
+{
+  /* This test is executed in the C locale.  */
+
+  {
+    const char input[] = "foo";
+    const char *result = mbsstr (input, "");
+    ASSERT (result == input);
+  }
+
+  {
+    const char input[] = "foo";
+    const char *result = mbsstr (input, "o");
+    ASSERT (result == input + 1);
+  }
+
+  {
+    const char input[] = "ABC ABCDAB ABCDABCDABDE";
+    const char *result = mbsstr (input, "ABCDABD");
+    ASSERT (result == input + 15);
+  }
+
+  {
+    const char input[] = "ABC ABCDAB ABCDABCDABDE";
+    const char *result = mbsstr (input, "ABCDABE");
+    ASSERT (result == NULL);
+  }
+
+  /* Check that a very long haystack is handled quickly if the needle is
+     short and occurs near the beginning.  */
+  {
+    size_t repeat = 10000;
+    size_t m = 1000000;
+    const char *needle =
+      "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+      "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
+    char *haystack = (char *) malloc (m + 1);
+    if (haystack != NULL)
+      {
+        memset (haystack, 'A', m);
+        haystack[0] = 'B';
+        haystack[m] = '\0';
+
+        for (; repeat > 0; repeat--)
+          {
+            ASSERT (mbsstr (haystack, needle) == haystack + 1);
+          }
+
+        free (haystack);
+      }
+  }
+
+  /* Check that a very long needle is discarded quickly if the haystack is
+     short.  */
+  {
+    size_t repeat = 10000;
+    size_t m = 1000000;
+    const char *haystack =
+      "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+      "ABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABAB";
+    char *needle = (char *) malloc (m + 1);
+    if (needle != NULL)
+      {
+        memset (needle, 'A', m);
+        needle[m] = '\0';
+
+        for (; repeat > 0; repeat--)
+          {
+            ASSERT (mbsstr (haystack, needle) == NULL);
+          }
+
+        free (needle);
+      }
+  }
+
+  /* Check that the asymptotic worst-case complexity is not quadratic.  */
+  {
+    size_t m = 1000000;
+    char *haystack = (char *) malloc (2 * m + 2);
+    char *needle = (char *) malloc (m + 2);
+    if (haystack != NULL && needle != NULL)
+      {
+        const char *result;
+
+        memset (haystack, 'A', 2 * m);
+        haystack[2 * m] = 'B';
+        haystack[2 * m + 1] = '\0';
+
+        memset (needle, 'A', m);
+        needle[m] = 'B';
+        needle[m + 1] = '\0';
+
+        result = mbsstr (haystack, needle);
+        ASSERT (result == haystack + m);
+      }
+    free (needle);
+    free (haystack);
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-mbsstr2.c b/src/grep/gnulib-tests/test-mbsstr2.c
new file mode 100644
index 0000000..6727358
--- /dev/null
+++ b/src/grep/gnulib-tests/test-mbsstr2.c
@@ -0,0 +1,141 @@
+/* Test of searching in a string.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include <locale.h>
+#include <stdlib.h>
+
+#include "macros.h"
+
+int
+main ()
+{
+  /* configure should already have checked that the locale is supported.  */
+  if (setlocale (LC_ALL, "") == NULL)
+    return 1;
+
+  {
+    const char input[] = "f\303\266\303\266";
+    const char *result = mbsstr (input, "");
+    ASSERT (result == input);
+  }
+
+  {
+    const char input[] = "f\303\266\303\266";
+    const char *result = mbsstr (input, "\303\266");
+    ASSERT (result == input + 1);
+  }
+
+  {
+    const char input[] = "f\303\266\303\266";
+    const char *result = mbsstr (input, "\266\303");
+    ASSERT (result == NULL);
+  }
+
+  {
+    const char input[] = "\303\204BC \303\204BCD\303\204B \303\204BCD\303\204BCD\303\204BDE"; /* "ÄBC ÄBCDÄB ÄBCDÄBCDÄBDE" */
+    const char *result = mbsstr (input, "\303\204BCD\303\204BD"); /* "ÄBCDÄBD" */
+    ASSERT (result == input + 19);
+  }
+
+  {
+    const char input[] = "\303\204BC \303\204BCD\303\204B \303\204BCD\303\204BCD\303\204BDE"; /* "ÄBC ÄBCDÄB ÄBCDÄBCDÄBDE" */
+    const char *result = mbsstr (input, "\303\204BCD\303\204BE"); /* "ÄBCDÄBE" */
+    ASSERT (result == NULL);
+  }
+
+  /* Check that a very long haystack is handled quickly if the needle is
+     short and occurs near the beginning.  */
+  {
+    size_t repeat = 10000;
+    size_t m = 1000000;
+    const char *needle =
+      "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+      "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
+    char *haystack = (char *) malloc (m + 1);
+    if (haystack != NULL)
+      {
+        memset (haystack, 'A', m);
+        haystack[0] = '\303'; haystack[1] = '\204';
+        haystack[m] = '\0';
+
+        for (; repeat > 0; repeat--)
+          {
+            ASSERT (mbsstr (haystack, needle) == haystack + 2);
+          }
+
+        free (haystack);
+      }
+  }
+
+  /* Check that a very long needle is discarded quickly if the haystack is
+     short.  */
+  {
+    size_t repeat = 10000;
+    size_t m = 1000000;
+    const char *haystack =
+      "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+      "A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207"
+      "A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207"
+      "A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207"
+      "A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207"
+      "A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207";
+    char *needle = (char *) malloc (m + 1);
+    if (needle != NULL)
+      {
+        memset (needle, 'A', m);
+        needle[m] = '\0';
+
+        for (; repeat > 0; repeat--)
+          {
+            ASSERT (mbsstr (haystack, needle) == NULL);
+          }
+
+        free (needle);
+      }
+  }
+
+  /* Check that the asymptotic worst-case complexity is not quadratic.  */
+  {
+    size_t m = 1000000;
+    char *haystack = (char *) malloc (2 * m + 3);
+    char *needle = (char *) malloc (m + 3);
+    if (haystack != NULL && needle != NULL)
+      {
+        const char *result;
+
+        memset (haystack, 'A', 2 * m);
+        haystack[2 * m] = '\303'; haystack[2 * m + 1] = '\207';
+        haystack[2 * m + 2] = '\0';
+
+        memset (needle, 'A', m);
+        needle[m] = '\303'; needle[m + 1] = '\207';
+        needle[m + 2] = '\0';
+
+        result = mbsstr (haystack, needle);
+        ASSERT (result == haystack + m);
+      }
+    free (needle);
+    free (haystack);
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-mbsstr2.sh b/src/grep/gnulib-tests/test-mbsstr2.sh
new file mode 100755
index 0000000..5ef7139
--- /dev/null
+++ b/src/grep/gnulib-tests/test-mbsstr2.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Test whether a specific UTF-8 locale is installed.
+: ${LOCALE_FR_UTF8=fr_FR.UTF-8}
+if test $LOCALE_FR_UTF8 = none; then
+  if test -f /usr/bin/localedef; then
+    echo "Skipping test: no french Unicode locale is installed"
+  else
+    echo "Skipping test: no french Unicode locale is supported"
+  fi
+  exit 77
+fi
+
+LC_ALL=$LOCALE_FR_UTF8 \
+${CHECKER} ./test-mbsstr2${EXEEXT}
diff --git a/src/grep/gnulib-tests/test-mbsstr3.c b/src/grep/gnulib-tests/test-mbsstr3.c
new file mode 100644
index 0000000..91834df
--- /dev/null
+++ b/src/grep/gnulib-tests/test-mbsstr3.c
@@ -0,0 +1,81 @@
+/* Test of searching in a string.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include <locale.h>
+
+#include "macros.h"
+
+int
+main ()
+{
+  /* configure should already have checked that the locale is supported.  */
+  if (setlocale (LC_ALL, "") == NULL)
+    return 1;
+
+  /* Tests with a character < 0x30.  */
+  {
+    const char input[] = "\312\276\300\375 \312\276\300\375 \312\276\300\375"; /* "示例 示例 示例" */
+    const char *result = mbsstr (input, " ");
+    ASSERT (result == input + 4);
+  }
+
+  {
+    const char input[] = "\312\276\300\375"; /* "示例" */
+    const char *result = mbsstr (input, " ");
+    ASSERT (result == NULL);
+  }
+
+  /* Tests with a character >= 0x30.  */
+  {
+    const char input[] = "\272\305123\324\313\320\320\241\243"; /* "号123运行。" */
+    const char *result = mbsstr (input, "2");
+    ASSERT (result == input + 3);
+  }
+
+  /* The following tests show how mbsstr() is different from strstr().  */
+
+  {
+    const char input[] = "\313\320\320\320"; /* "诵行" */
+    const char *result = mbsstr (input, "\320\320"); /* "行" */
+    ASSERT (result == input + 2);
+  }
+
+  {
+    const char input[] = "\203\062\332\066123\324\313\320\320\241\243"; /* "씋123运行。" */
+    const char *result = mbsstr (input, "2");
+    ASSERT (result == input + 5);
+  }
+
+  {
+    const char input[] = "\312\276\300\375 \312\276\300\375 \312\276\300\375"; /* "示例 示例 示例" */
+    const char *result = mbsstr (input, "\276\300"); /* "纠" */
+    ASSERT (result == NULL);
+  }
+
+  {
+    const char input[] = "\312\276\300\375 \312\276\300\375 \312\276\300\375"; /* "示例 示例 示例" */
+    const char *result = mbsstr (input, "\375 "); /* invalid multibyte sequence */
+    ASSERT (result == NULL);
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-mbsstr3.sh b/src/grep/gnulib-tests/test-mbsstr3.sh
new file mode 100755
index 0000000..539f9c0
--- /dev/null
+++ b/src/grep/gnulib-tests/test-mbsstr3.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Test whether a specific GB18030 locale is installed.
+: ${LOCALE_ZH_CN=zh_CN.GB18030}
+if test $LOCALE_ZH_CN = none; then
+  if test -f /usr/bin/localedef; then
+    echo "Skipping test: no chinese GB18030 locale is installed"
+  else
+    echo "Skipping test: no chinese GB18030 locale is supported"
+  fi
+  exit 77
+fi
+
+LC_ALL=$LOCALE_ZH_CN \
+${CHECKER} ./test-mbsstr3${EXEEXT}
diff --git a/src/grep/gnulib-tests/test-memchr.c b/src/grep/gnulib-tests/test-memchr.c
new file mode 100644
index 0000000..1357d08
--- /dev/null
+++ b/src/grep/gnulib-tests/test-memchr.c
@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2008-2021 Free Software Foundation, Inc.
+ * Written by Eric Blake and Bruno Haible
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (memchr, void *, (void const *, int, size_t));
+
+#include <stdlib.h>
+
+#include "zerosize-ptr.h"
+#include "macros.h"
+
+/* Calculating void * + int is not portable, so this wrapper converts
+   to char * to make the tests easier to write.  */
+#define MEMCHR (char *) memchr
+
+int
+main (void)
+{
+  size_t n = 0x100000;
+  char *input = malloc (n);
+  ASSERT (input);
+
+  input[0] = 'a';
+  input[1] = 'b';
+  memset (input + 2, 'c', 1024);
+  memset (input + 1026, 'd', n - 1028);
+  input[n - 2] = 'e';
+  input[n - 1] = 'a';
+
+  /* Basic behavior tests.  */
+  ASSERT (MEMCHR (input, 'a', n) == input);
+
+  ASSERT (MEMCHR (input, 'a', 0) == NULL);
+
+  {
+    void *page_boundary = zerosize_ptr ();
+    if (page_boundary)
+      ASSERT (MEMCHR (page_boundary, 'a', 0) == NULL);
+  }
+
+  ASSERT (MEMCHR (input, 'b', n) == input + 1);
+  ASSERT (MEMCHR (input, 'c', n) == input + 2);
+  ASSERT (MEMCHR (input, 'd', n) == input + 1026);
+
+  ASSERT (MEMCHR (input + 1, 'a', n - 1) == input + n - 1);
+  ASSERT (MEMCHR (input + 1, 'e', n - 1) == input + n - 2);
+  ASSERT (MEMCHR (input + 1, 0x789abc00 | 'e', n - 1) == input + n - 2);
+
+  ASSERT (MEMCHR (input, 'f', n) == NULL);
+  ASSERT (MEMCHR (input, '\0', n) == NULL);
+
+  /* Check that a very long haystack is handled quickly if the byte is
+     found near the beginning.  */
+  {
+    size_t repeat = 10000;
+    for (; repeat > 0; repeat--)
+      {
+        ASSERT (MEMCHR (input, 'c', n) == input + 2);
+      }
+  }
+
+  /* Alignment tests.  */
+  {
+    int i, j;
+    for (i = 0; i < 32; i++)
+      {
+        for (j = 0; j < 256; j++)
+          input[i + j] = j;
+        for (j = 0; j < 256; j++)
+          {
+            ASSERT (MEMCHR (input + i, j, 256) == input + i + j);
+          }
+      }
+  }
+
+  /* Check that memchr() does not read past the first occurrence of the
+     byte being searched.  See the Austin Group's clarification
+     <https://www.opengroup.org/austin/docs/austin_454.txt>.
+     Test both '\0' and something else, since some implementations
+     special-case searching for NUL.
+  */
+  {
+    char *page_boundary = (char *) zerosize_ptr ();
+    /* Too small, and we miss cache line boundary tests; too large,
+       and the test takes cubically longer to complete.  */
+    int limit = 257;
+
+    if (page_boundary != NULL)
+      {
+        for (n = 1; n <= limit; n++)
+          {
+            char *mem = page_boundary - n;
+            memset (mem, 'X', n);
+            ASSERT (MEMCHR (mem, 'U', n) == NULL);
+            ASSERT (MEMCHR (mem, 0, n) == NULL);
+
+            {
+              size_t i;
+              size_t k;
+
+              for (i = 0; i < n; i++)
+                {
+                  mem[i] = 'U';
+                  for (k = i + 1; k < n + limit; k++)
+                    ASSERT (MEMCHR (mem, 'U', k) == mem + i);
+                  mem[i] = 0;
+                  for (k = i + 1; k < n + limit; k++)
+                    ASSERT (MEMCHR (mem, 0, k) == mem + i);
+                  mem[i] = 'X';
+                }
+            }
+          }
+      }
+  }
+
+  free (input);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-memchr2.c b/src/grep/gnulib-tests/test-memchr2.c
new file mode 100644
index 0000000..abaa18e
--- /dev/null
+++ b/src/grep/gnulib-tests/test-memchr2.c
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2008-2021 Free Software Foundation, Inc.
+ * Written by Eric Blake
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "memchr2.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "zerosize-ptr.h"
+#include "macros.h"
+
+/* Calculating void * + int is not portable, so this wrapper converts
+   to char * to make the tests easier to write.  */
+#define MEMCHR2 (char *) memchr2
+
+int
+main (void)
+{
+  size_t n = 0x100000;
+  char *input = malloc (n);
+  ASSERT (input);
+
+  input[0] = 'a';
+  input[1] = 'b';
+  memset (input + 2, 'c', 1024);
+  memset (input + 1026, 'd', n - 1028);
+  input[n - 2] = 'e';
+  input[n - 1] = 'a';
+
+  /* Basic behavior tests.  */
+  ASSERT (MEMCHR2 (input, 'a', 'b', n) == input);
+  ASSERT (MEMCHR2 (input, 'b', 'a', n) == input);
+
+  ASSERT (MEMCHR2 (input, 'a', 'b', 0) == NULL);
+  void *page_boundary = zerosize_ptr ();
+  if (page_boundary)
+    ASSERT (MEMCHR2 (page_boundary, 'a', 'b', 0) == NULL);
+
+  ASSERT (MEMCHR2 (input, 'b', 'd', n) == input + 1);
+  ASSERT (MEMCHR2 (input + 2, 'b', 'd', n - 2) == input + 1026);
+
+  ASSERT (MEMCHR2 (input, 'd', 'e', n) == input + 1026);
+  ASSERT (MEMCHR2 (input, 'e', 'd', n) == input + 1026);
+
+  ASSERT (MEMCHR2 (input + 1, 'a', 'e', n - 1) == input + n - 2);
+  ASSERT (MEMCHR2 (input + 1, 'e', 'a', n - 1) == input + n - 2);
+
+  ASSERT (MEMCHR2 (input, 'f', 'g', n) == NULL);
+  ASSERT (MEMCHR2 (input, 'f', '\0', n) == NULL);
+
+  ASSERT (MEMCHR2 (input, 'a', 'a', n) == input);
+  ASSERT (MEMCHR2 (input + 1, 'a', 'a', n - 1) == input + n - 1);
+  ASSERT (MEMCHR2 (input, 'f', 'f', n) == NULL);
+
+  /* Check that a very long haystack is handled quickly if one of the
+     two bytes is found near the beginning.  */
+  {
+    size_t repeat = 10000;
+    for (; repeat > 0; repeat--)
+      {
+        ASSERT (MEMCHR2 (input, 'c', 'e', n) == input + 2);
+        ASSERT (MEMCHR2 (input, 'e', 'c', n) == input + 2);
+        ASSERT (MEMCHR2 (input, 'c', '\0', n) == input + 2);
+        ASSERT (MEMCHR2 (input, '\0', 'c', n) == input + 2);
+      }
+  }
+
+  /* Alignment tests.  */
+  {
+    int i, j;
+    for (i = 0; i < 32; i++)
+      {
+        for (j = 0; j < 256; j++)
+          input[i + j] = j;
+        for (j = 0; j < 256; j++)
+          {
+            ASSERT (MEMCHR2 (input + i, j, 0xff, 256) == input + i + j);
+            ASSERT (MEMCHR2 (input + i, 0xff, j, 256) == input + i + j);
+          }
+      }
+  }
+
+  free (input);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-memrchr.c b/src/grep/gnulib-tests/test-memrchr.c
new file mode 100644
index 0000000..9df55c1
--- /dev/null
+++ b/src/grep/gnulib-tests/test-memrchr.c
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2008-2021 Free Software Foundation, Inc.
+ * Written by Eric Blake and Bruno Haible
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (memrchr, void *, (void const *, int, size_t));
+
+#include <stdlib.h>
+
+#include "zerosize-ptr.h"
+#include "macros.h"
+
+/* Work around GCC bug 101494.  */
+#if 4 < __GNUC__ + (3 <= __GNUC_MINOR__)
+# pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif
+
+/* Calculating void * + int is not portable, so this wrapper converts
+   to char * to make the tests easier to write.  */
+#define MEMRCHR (char *) memrchr
+
+int
+main (void)
+{
+  size_t n = 0x100000;
+  char *input = malloc (n);
+  ASSERT (input);
+
+  input[n - 1] = 'a';
+  input[n - 2] = 'b';
+  memset (input + n - 1026, 'c', 1024);
+  memset (input + 2, 'd', n - 1028);
+  input[1] = 'e';
+  input[0] = 'a';
+
+  /* Basic behavior tests.  */
+  ASSERT (MEMRCHR (input, 'a', n) == input + n - 1);
+
+  ASSERT (MEMRCHR (input, 'a', 0) == NULL);
+  void *page_boundary = zerosize_ptr ();
+  if (page_boundary)
+    ASSERT (MEMRCHR (page_boundary, 'a', 0) == NULL);
+
+  ASSERT (MEMRCHR (input, 'b', n) == input + n - 2);
+  ASSERT (MEMRCHR (input, 'c', n) == input + n - 3);
+  ASSERT (MEMRCHR (input, 'd', n) == input + n - 1027);
+
+  ASSERT (MEMRCHR (input, 'a', n - 1) == input);
+  ASSERT (MEMRCHR (input, 'e', n - 1) == input + 1);
+
+  ASSERT (MEMRCHR (input, 'f', n) == NULL);
+  ASSERT (MEMRCHR (input, '\0', n) == NULL);
+
+  /* Check that a very long haystack is handled quickly if the byte is
+     found near the end.  */
+  {
+    size_t repeat = 10000;
+    for (; repeat > 0; repeat--)
+      {
+        ASSERT (MEMRCHR (input, 'c', n) == input + n - 3);
+      }
+  }
+
+  /* Alignment tests.  */
+  {
+    int i, j;
+    for (i = 0; i < 32; i++)
+      {
+        for (j = 0; j < 256; j++)
+          input[i + j] = j;
+        for (j = 0; j < 256; j++)
+          {
+            ASSERT (MEMRCHR (input + i, j, 256) == input + i + j);
+          }
+      }
+  }
+
+  free (input);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-nanosleep.c b/src/grep/gnulib-tests/test-nanosleep.c
new file mode 100644
index 0000000..4464006
--- /dev/null
+++ b/src/grep/gnulib-tests/test-nanosleep.c
@@ -0,0 +1,83 @@
+/* Test of nanosleep() function.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <time.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (nanosleep, int, (struct timespec const *, struct timespec *));
+
+#include <errno.h>
+#include <signal.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#if HAVE_DECL_ALARM
+static void
+handle_alarm (int sig)
+{
+  if (sig != SIGALRM)
+    _exit (1);
+}
+#endif
+
+int
+main (void)
+{
+  struct timespec ts;
+
+  ts.tv_sec = 1000;
+  ts.tv_nsec = -1;
+  errno = 0;
+  ASSERT (nanosleep (&ts, NULL) == -1);
+  ASSERT (errno == EINVAL);
+  ts.tv_nsec = 1000000000;
+  errno = 0;
+  ASSERT (nanosleep (&ts, NULL) == -1);
+  ASSERT (errno == EINVAL);
+
+  ts.tv_sec = 0;
+  ts.tv_nsec = 1;
+  ASSERT (nanosleep (&ts, &ts) == 0);
+  /* Remaining time is only defined on EINTR failure; but on success,
+     it is typically either 0 or unchanged from input.  At any rate,
+     it shouldn't be randomly changed to unrelated values.  */
+  ASSERT (ts.tv_sec == 0);
+  ASSERT (ts.tv_nsec == 0 || ts.tv_nsec == 1);
+  ts.tv_nsec = 0;
+  ASSERT (nanosleep (&ts, NULL) == 0);
+
+#if HAVE_DECL_ALARM
+  {
+    const time_t pentecost = 50 * 24 * 60 * 60; /* 50 days.  */
+    signal (SIGALRM, handle_alarm);
+    alarm (1);
+    ts.tv_sec = pentecost;
+    ts.tv_nsec = 999999999;
+    errno = 0;
+    ASSERT (nanosleep (&ts, &ts) == -1);
+    ASSERT (errno == EINTR);
+    ASSERT (pentecost - 10 < ts.tv_sec && ts.tv_sec <= pentecost);
+    ASSERT (0 <= ts.tv_nsec && ts.tv_nsec <= 999999999);
+  }
+#endif
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-netinet_in.c b/src/grep/gnulib-tests/test-netinet_in.c
new file mode 100644
index 0000000..c0de97f
--- /dev/null
+++ b/src/grep/gnulib-tests/test-netinet_in.c
@@ -0,0 +1,27 @@
+/* Test of <netinet/in.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <netinet/in.h>
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-nl_langinfo-mt.c b/src/grep/gnulib-tests/test-nl_langinfo-mt.c
new file mode 100644
index 0000000..5ff6490
--- /dev/null
+++ b/src/grep/gnulib-tests/test-nl_langinfo-mt.c
@@ -0,0 +1,253 @@
+/* Multithread-safety test for nl_langinfo().
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+/* Work around GCC bug 44511.  */
+#if 4 < __GNUC__ + (3 <= __GNUC_MINOR__)
+# pragma GCC diagnostic ignored "-Wreturn-type"
+#endif
+
+#if USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS
+
+/* Specification.  */
+#include <langinfo.h>
+
+#include <locale.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "glthread/thread.h"
+
+
+/* Some common locale names.  */
+
+#if defined _WIN32 && !defined __CYGWIN__
+# define ENGLISH "English_United States"
+# define FRENCH  "French_France"
+# define GERMAN  "German_Germany"
+# define ENCODING ".1252"
+#else
+# define ENGLISH "en_US"
+# define FRENCH  "fr_FR"
+# define GERMAN  "de_DE"
+# if defined __sgi
+#  define ENCODING ".ISO8859-15"
+# elif defined __hpux
+#  define ENCODING ".utf8"
+# else
+#  define ENCODING ".UTF-8"
+# endif
+#endif
+
+static const char LOCALE1[] = ENGLISH ENCODING;
+static const char LOCALE2[] = FRENCH ENCODING;
+static const char LOCALE3[] = GERMAN ENCODING;
+
+static char *expected1;
+
+static void *
+thread1_func (void *arg)
+{
+  for (;;)
+    {
+      const char *value = nl_langinfo (CODESET);
+      if (strcmp (expected1, value) != 0)
+        {
+          fprintf (stderr, "thread1 disturbed by threadN!\n"); fflush (stderr);
+          abort ();
+        }
+    }
+
+  /*NOTREACHED*/
+}
+
+static char *expected2;
+
+static void *
+thread2_func (void *arg)
+{
+  for (;;)
+    {
+      const char *value = nl_langinfo (PM_STR);
+      if (strcmp (expected2, value) != 0)
+        {
+          fprintf (stderr, "thread2 disturbed by threadN!\n"); fflush (stderr);
+          abort ();
+        }
+    }
+
+  /*NOTREACHED*/
+}
+
+static char *expected3;
+
+static void *
+thread3_func (void *arg)
+{
+  for (;;)
+    {
+      const char *value = nl_langinfo (DAY_2);
+      if (strcmp (expected3, value) != 0)
+        {
+          fprintf (stderr, "thread3 disturbed by threadN!\n"); fflush (stderr);
+          abort ();
+        }
+    }
+
+  /*NOTREACHED*/
+}
+
+static char *expected4;
+
+static void *
+thread4_func (void *arg)
+{
+  for (;;)
+    {
+      const char *value = nl_langinfo (ALTMON_2);
+      if (strcmp (expected4, value) != 0)
+        {
+          fprintf (stderr, "thread4 disturbed by threadN!\n"); fflush (stderr);
+          abort ();
+        }
+    }
+
+  /*NOTREACHED*/
+}
+
+static char *expected5;
+
+static void *
+thread5_func (void *arg)
+{
+  for (;;)
+    {
+      const char *value = nl_langinfo (CRNCYSTR);
+      if (strcmp (expected5, value) != 0)
+        {
+          fprintf (stderr, "thread5 disturbed by threadN!\n"); fflush (stderr);
+          abort ();
+        }
+    }
+
+  /*NOTREACHED*/
+}
+
+static char *expected6;
+
+static void *
+thread6_func (void *arg)
+{
+  for (;;)
+    {
+      const char *value = nl_langinfo (RADIXCHAR);
+      if (strcmp (expected6, value) != 0)
+        {
+          fprintf (stderr, "thread6 disturbed by threadN!\n"); fflush (stderr);
+          abort ();
+        }
+    }
+
+  /*NOTREACHED*/
+}
+
+static void *
+threadN_func (void *arg)
+{
+  for (;;)
+    {
+      nl_langinfo (CODESET);   /* LC_CTYPE */    /* locale charmap */
+      nl_langinfo (AM_STR);    /* LC_TIME */     /* locale -k am_pm */
+      nl_langinfo (PM_STR);    /* LC_TIME */     /* locale -k am_pm */
+      nl_langinfo (DAY_2);     /* LC_TIME */     /* locale -k day */
+      nl_langinfo (DAY_5);     /* LC_TIME */     /* locale -k day */
+      nl_langinfo (ALTMON_2);  /* LC_TIME */     /* locale -k alt_mon */
+      nl_langinfo (ALTMON_9);  /* LC_TIME */     /* locale -k alt_mon */
+      nl_langinfo (CRNCYSTR);  /* LC_MONETARY */ /* locale -k currency_symbol */
+      nl_langinfo (RADIXCHAR); /* LC_NUMERIC */  /* locale -k decimal_point */
+      nl_langinfo (THOUSEP);   /* LC_NUMERIC */  /* locale -k thousands_sep */
+    }
+
+  /*NOTREACHED*/
+}
+
+int
+main (int argc, char *argv[])
+{
+  if (setlocale (LC_ALL, LOCALE1) == NULL)
+    {
+      fprintf (stderr, "Skipping test: LOCALE1 not recognized\n");
+      return 77;
+    }
+  if (setlocale (LC_MONETARY, LOCALE2) == NULL)
+    {
+      fprintf (stderr, "Skipping test: LOCALE2 not recognized\n");
+      return 77;
+    }
+  if (setlocale (LC_NUMERIC, LOCALE3) == NULL)
+    {
+      fprintf (stderr, "Skipping test: LOCALE3 not recognized\n");
+      return 77;
+    }
+
+  expected1 = strdup (nl_langinfo (CODESET));
+  expected2 = strdup (nl_langinfo (PM_STR));
+  expected3 = strdup (nl_langinfo (DAY_2));
+  expected4 = strdup (nl_langinfo (ALTMON_2));
+  expected5 = strdup (nl_langinfo (CRNCYSTR));
+  expected6 = strdup (nl_langinfo (RADIXCHAR));
+
+  /* Create the checker threads.  */
+  gl_thread_create (thread1_func, NULL);
+  gl_thread_create (thread2_func, NULL);
+  gl_thread_create (thread3_func, NULL);
+  gl_thread_create (thread4_func, NULL);
+  gl_thread_create (thread5_func, NULL);
+  gl_thread_create (thread6_func, NULL);
+  /* Create the disturber thread.  */
+  gl_thread_create (threadN_func, NULL);
+
+  /* Let them run for 2 seconds.  */
+  {
+    struct timespec duration;
+    duration.tv_sec = (argc > 1 ? atoi (argv[1]) : 2);
+    duration.tv_nsec = 0;
+
+    nanosleep (&duration, NULL);
+  }
+
+  return 0;
+}
+
+#else
+
+/* No multithreading available.  */
+
+#include <stdio.h>
+
+int
+main ()
+{
+  fputs ("Skipping test: multithreading not enabled\n", stderr);
+  return 77;
+}
+
+#endif
diff --git a/src/grep/gnulib-tests/test-nl_langinfo.c b/src/grep/gnulib-tests/test-nl_langinfo.c
new file mode 100644
index 0000000..def628b
--- /dev/null
+++ b/src/grep/gnulib-tests/test-nl_langinfo.c
@@ -0,0 +1,152 @@
+/* Test of nl_langinfo replacement.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+#include <config.h>
+
+#include <langinfo.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (nl_langinfo, char *, (nl_item));
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "c-strcase.h"
+#include "macros.h"
+
+/* For GCC >= 4.3, silence the warnings
+     "comparison of unsigned expression >= 0 is always true"
+   in this file.  */
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
+# pragma GCC diagnostic ignored "-Wtype-limits"
+#endif
+
+int
+main (int argc, char *argv[])
+{
+  int pass = atoi (argv[1]);
+  /* pass    locale
+      0        C
+      1        traditional French locale
+      2        French UTF-8 locale
+   */
+
+  setlocale (LC_ALL, "");
+
+  /* nl_langinfo items of the LC_CTYPE category */
+  ASSERT (strlen (nl_langinfo (CODESET)) > 0);
+  if (pass == 2)
+    {
+      const char *codeset = nl_langinfo (CODESET);
+      ASSERT (c_strcasecmp (codeset, "UTF-8") == 0 || c_strcasecmp (codeset, "UTF8") == 0);
+    }
+  /* nl_langinfo items of the LC_NUMERIC category */
+  ASSERT (strlen (nl_langinfo (RADIXCHAR)) > 0);
+  ASSERT (strlen (nl_langinfo (THOUSEP)) >= 0);
+  /* nl_langinfo items of the LC_TIME category */
+  ASSERT (strlen (nl_langinfo (D_T_FMT)) > 0);
+  ASSERT (strlen (nl_langinfo (D_FMT)) > 0);
+  ASSERT (strlen (nl_langinfo (T_FMT)) > 0);
+  ASSERT (strlen (nl_langinfo (T_FMT_AMPM)) >= (pass == 0 ? 1 : 0));
+  ASSERT (strlen (nl_langinfo (AM_STR)) >= (pass == 0 ? 1 : 0));
+  ASSERT (strlen (nl_langinfo (PM_STR)) >= (pass == 0 ? 1 : 0));
+  ASSERT (strlen (nl_langinfo (DAY_1)) > 0);
+  ASSERT (strlen (nl_langinfo (DAY_2)) > 0);
+  ASSERT (strlen (nl_langinfo (DAY_3)) > 0);
+  ASSERT (strlen (nl_langinfo (DAY_4)) > 0);
+  ASSERT (strlen (nl_langinfo (DAY_5)) > 0);
+  ASSERT (strlen (nl_langinfo (DAY_6)) > 0);
+  ASSERT (strlen (nl_langinfo (DAY_7)) > 0);
+  ASSERT (strlen (nl_langinfo (ABDAY_1)) > 0);
+  ASSERT (strlen (nl_langinfo (ABDAY_2)) > 0);
+  ASSERT (strlen (nl_langinfo (ABDAY_3)) > 0);
+  ASSERT (strlen (nl_langinfo (ABDAY_4)) > 0);
+  ASSERT (strlen (nl_langinfo (ABDAY_5)) > 0);
+  ASSERT (strlen (nl_langinfo (ABDAY_6)) > 0);
+  ASSERT (strlen (nl_langinfo (ABDAY_7)) > 0);
+  ASSERT (strlen (nl_langinfo (MON_1)) > 0);
+  ASSERT (strlen (nl_langinfo (MON_2)) > 0);
+  ASSERT (strlen (nl_langinfo (MON_3)) > 0);
+  ASSERT (strlen (nl_langinfo (MON_4)) > 0);
+  ASSERT (strlen (nl_langinfo (MON_5)) > 0);
+  ASSERT (strlen (nl_langinfo (MON_6)) > 0);
+  ASSERT (strlen (nl_langinfo (MON_7)) > 0);
+  ASSERT (strlen (nl_langinfo (MON_8)) > 0);
+  ASSERT (strlen (nl_langinfo (MON_9)) > 0);
+  ASSERT (strlen (nl_langinfo (MON_10)) > 0);
+  ASSERT (strlen (nl_langinfo (MON_11)) > 0);
+  ASSERT (strlen (nl_langinfo (MON_12)) > 0);
+  ASSERT (strlen (nl_langinfo (ALTMON_1)) > 0);
+  ASSERT (strlen (nl_langinfo (ALTMON_2)) > 0);
+  ASSERT (strlen (nl_langinfo (ALTMON_3)) > 0);
+  ASSERT (strlen (nl_langinfo (ALTMON_4)) > 0);
+  ASSERT (strlen (nl_langinfo (ALTMON_5)) > 0);
+  ASSERT (strlen (nl_langinfo (ALTMON_6)) > 0);
+  ASSERT (strlen (nl_langinfo (ALTMON_7)) > 0);
+  ASSERT (strlen (nl_langinfo (ALTMON_8)) > 0);
+  ASSERT (strlen (nl_langinfo (ALTMON_9)) > 0);
+  ASSERT (strlen (nl_langinfo (ALTMON_10)) > 0);
+  ASSERT (strlen (nl_langinfo (ALTMON_11)) > 0);
+  ASSERT (strlen (nl_langinfo (ALTMON_12)) > 0);
+  /* In the tested locales, alternate month names and month names ought to be
+     the same.  */
+  ASSERT (strcmp (nl_langinfo (ALTMON_1), nl_langinfo (MON_1)) == 0);
+  ASSERT (strcmp (nl_langinfo (ALTMON_2), nl_langinfo (MON_2)) == 0);
+  ASSERT (strcmp (nl_langinfo (ALTMON_3), nl_langinfo (MON_3)) == 0);
+  ASSERT (strcmp (nl_langinfo (ALTMON_4), nl_langinfo (MON_4)) == 0);
+  ASSERT (strcmp (nl_langinfo (ALTMON_5), nl_langinfo (MON_5)) == 0);
+  ASSERT (strcmp (nl_langinfo (ALTMON_6), nl_langinfo (MON_6)) == 0);
+  ASSERT (strcmp (nl_langinfo (ALTMON_7), nl_langinfo (MON_7)) == 0);
+  ASSERT (strcmp (nl_langinfo (ALTMON_8), nl_langinfo (MON_8)) == 0);
+  ASSERT (strcmp (nl_langinfo (ALTMON_9), nl_langinfo (MON_9)) == 0);
+  ASSERT (strcmp (nl_langinfo (ALTMON_10), nl_langinfo (MON_10)) == 0);
+  ASSERT (strcmp (nl_langinfo (ALTMON_11), nl_langinfo (MON_11)) == 0);
+  ASSERT (strcmp (nl_langinfo (ALTMON_12), nl_langinfo (MON_12)) == 0);
+  ASSERT (strlen (nl_langinfo (ABMON_1)) > 0);
+  ASSERT (strlen (nl_langinfo (ABMON_2)) > 0);
+  ASSERT (strlen (nl_langinfo (ABMON_3)) > 0);
+  ASSERT (strlen (nl_langinfo (ABMON_4)) > 0);
+  ASSERT (strlen (nl_langinfo (ABMON_5)) > 0);
+  ASSERT (strlen (nl_langinfo (ABMON_6)) > 0);
+  ASSERT (strlen (nl_langinfo (ABMON_7)) > 0);
+  ASSERT (strlen (nl_langinfo (ABMON_8)) > 0);
+  ASSERT (strlen (nl_langinfo (ABMON_9)) > 0);
+  ASSERT (strlen (nl_langinfo (ABMON_10)) > 0);
+  ASSERT (strlen (nl_langinfo (ABMON_11)) > 0);
+  ASSERT (strlen (nl_langinfo (ABMON_12)) > 0);
+  ASSERT (strlen (nl_langinfo (ERA)) >= 0);
+  ASSERT (strlen (nl_langinfo (ERA_D_FMT)) >= 0);
+  ASSERT (strlen (nl_langinfo (ERA_D_T_FMT)) >= 0);
+  ASSERT (strlen (nl_langinfo (ERA_T_FMT)) >= 0);
+  ASSERT (nl_langinfo (ALT_DIGITS) != NULL);
+  /* nl_langinfo items of the LC_MONETARY category */
+  {
+    const char *currency = nl_langinfo (CRNCYSTR);
+    ASSERT (strlen (currency) >= 0);
+#if !defined __NetBSD__
+    if (pass > 0)
+      ASSERT (strlen (currency) >= 1);
+#endif
+  }
+  /* nl_langinfo items of the LC_MESSAGES category */
+  ASSERT (strlen (nl_langinfo (YESEXPR)) > 0);
+  ASSERT (strlen (nl_langinfo (NOEXPR)) > 0);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-nl_langinfo.sh b/src/grep/gnulib-tests/test-nl_langinfo.sh
new file mode 100755
index 0000000..b1ce46c
--- /dev/null
+++ b/src/grep/gnulib-tests/test-nl_langinfo.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+LC_ALL=C ${CHECKER} ./test-nl_langinfo${EXEEXT} 0 || exit 1
+
+# Test whether a specific traditional locale is installed.
+: ${LOCALE_FR=fr_FR}
+if test $LOCALE_FR != none; then
+  LC_ALL=$LOCALE_FR ${CHECKER} ./test-nl_langinfo${EXEEXT} 1 || exit 1
+fi
+
+# Test whether a specific UTF-8 locale is installed.
+: ${LOCALE_FR_UTF8=fr_FR.UTF-8}
+if test $LOCALE_FR_UTF8 != none; then
+  LC_ALL=$LOCALE_FR_UTF8 ${CHECKER} ./test-nl_langinfo${EXEEXT} 2 || exit 1
+fi
+
+exit 0
diff --git a/src/grep/gnulib-tests/test-open.c b/src/grep/gnulib-tests/test-open.c
new file mode 100644
index 0000000..1524af4
--- /dev/null
+++ b/src/grep/gnulib-tests/test-open.c
@@ -0,0 +1,41 @@
+/* Test of opening a file descriptor.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <fcntl.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (open, int, (char const *, int, ...));
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#define BASE "test-open.t"
+
+#include "test-open.h"
+
+int
+main (void)
+{
+  return test_open (open, true);
+}
diff --git a/src/grep/gnulib-tests/test-open.h b/src/grep/gnulib-tests/test-open.h
new file mode 100644
index 0000000..9ceb798
--- /dev/null
+++ b/src/grep/gnulib-tests/test-open.h
@@ -0,0 +1,133 @@
+/* Test of opening a file descriptor.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+/* Make test_open always inline if we're using Fortify, which defines
+   __always_inline to do that.  Do nothing otherwise.  This works
+   around a glibc bug whereby 'open' cannot be used as a function
+   pointer when _FORTIFY_SOURCE is positive.  */
+
+#if __GLIBC__ && defined __always_inline
+# define ALWAYS_INLINE __always_inline
+#else
+# define ALWAYS_INLINE
+#endif
+
+/* This file is designed to test both open(n,buf[,mode]) and
+   openat(AT_FDCWD,n,buf[,mode]).  FUNC is the function to test.
+   Assumes that BASE and ASSERT are already defined, and that
+   appropriate headers are already included.  If PRINT, warn before
+   skipping symlink tests with status 77.  */
+
+static ALWAYS_INLINE int
+test_open (int (*func) (char const *, int, ...), bool print)
+{
+  int fd;
+
+  /* Remove anything from prior partial run.  */
+  unlink (BASE "file");
+  unlink (BASE "e.exe");
+  unlink (BASE "link");
+
+  /* Cannot create directory.  */
+  errno = 0;
+  ASSERT (func ("nonexist.ent/", O_CREAT | O_RDONLY, 0600) == -1);
+  ASSERT (errno == ENOTDIR || errno == EISDIR || errno == ENOENT
+          || errno == EINVAL);
+
+  /* Create a regular file.  */
+  fd = func (BASE "file", O_CREAT | O_RDONLY, 0600);
+  ASSERT (0 <= fd);
+  ASSERT (close (fd) == 0);
+
+  /* Create an executable regular file.  */
+  fd = func (BASE "e.exe", O_CREAT | O_RDONLY, 0700);
+  ASSERT (0 <= fd);
+  ASSERT (close (fd) == 0);
+
+  /* Trailing slash handling.  */
+  errno = 0;
+  ASSERT (func (BASE "file/", O_RDONLY) == -1);
+  ASSERT (errno == ENOTDIR || errno == EISDIR || errno == EINVAL);
+
+  /* Directories cannot be opened for writing.  */
+  errno = 0;
+  ASSERT (func (".", O_WRONLY) == -1);
+  ASSERT (errno == EISDIR || errno == EACCES);
+
+  /* /dev/null must exist, and be writable.  */
+  fd = func ("/dev/null", O_RDONLY);
+  ASSERT (0 <= fd);
+  {
+    char c;
+    ASSERT (read (fd, &c, 1) == 0);
+  }
+  ASSERT (close (fd) == 0);
+  fd = func ("/dev/null", O_WRONLY);
+  ASSERT (0 <= fd);
+  ASSERT (write (fd, "c", 1) == 1);
+  ASSERT (close (fd) == 0);
+
+  /* Although O_NONBLOCK on regular files can be ignored, it must not
+     cause a failure.  */
+  fd = func (BASE "file", O_NONBLOCK | O_RDONLY);
+  ASSERT (0 <= fd);
+  ASSERT (close (fd) == 0);
+
+  /* O_CLOEXEC must be honoured.  */
+  if (O_CLOEXEC)
+    {
+      /* Since the O_CLOEXEC handling goes through a special code path at its
+         first invocation, test it twice.  */
+      int i;
+
+      for (i = 0; i < 2; i++)
+        {
+          int flags;
+
+          fd = func (BASE "file", O_CLOEXEC | O_RDONLY);
+          ASSERT (0 <= fd);
+          flags = fcntl (fd, F_GETFD);
+          ASSERT (flags >= 0);
+          ASSERT ((flags & FD_CLOEXEC) != 0);
+          ASSERT (close (fd) == 0);
+        }
+    }
+
+  /* Symlink handling, where supported.  */
+  if (symlink (BASE "file", BASE "link") != 0)
+    {
+      ASSERT (unlink (BASE "file") == 0);
+      if (print)
+        fputs ("skipping test: symlinks not supported on this file system\n",
+               stderr);
+      return 77;
+    }
+  errno = 0;
+  ASSERT (func (BASE "link/", O_RDONLY) == -1);
+  ASSERT (errno == ENOTDIR);
+  fd = func (BASE "link", O_RDONLY);
+  ASSERT (0 <= fd);
+  ASSERT (close (fd) == 0);
+
+  /* Cleanup.  */
+  ASSERT (unlink (BASE "file") == 0);
+  ASSERT (unlink (BASE "e.exe") == 0);
+  ASSERT (unlink (BASE "link") == 0);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-openat-safer.c b/src/grep/gnulib-tests/test-openat-safer.c
new file mode 100644
index 0000000..92f641c
--- /dev/null
+++ b/src/grep/gnulib-tests/test-openat-safer.c
@@ -0,0 +1,125 @@
+/* Test that openat_safer leave standard fds alone.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include "fcntl--.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+/* This test intentionally closes stderr.  So, we arrange to have fd 10
+   (outside the range of interesting fd's during the test) set up to
+   duplicate the original stderr.  */
+
+#define BACKUP_STDERR_FILENO 10
+#define ASSERT_STREAM myerr
+#include "macros.h"
+
+static FILE *myerr;
+
+#define witness "test-openat-safer.txt"
+
+int
+main (void)
+{
+  int i;
+  int j;
+  int dfd;
+  int fd;
+  char buf[2];
+
+  /* We close fd 2 later, so save it in fd 10.  */
+  if (dup2 (STDERR_FILENO, BACKUP_STDERR_FILENO) != BACKUP_STDERR_FILENO
+      || (myerr = fdopen (BACKUP_STDERR_FILENO, "w")) == NULL)
+    return 2;
+
+  /* Create handle for future use.  */
+  dfd = openat (AT_FDCWD, ".", O_RDONLY);
+  ASSERT (STDERR_FILENO < dfd);
+
+  /* Create file for later checks.  */
+  remove (witness);
+  fd = openat (dfd, witness, O_WRONLY | O_CREAT | O_EXCL, 0600);
+  ASSERT (STDERR_FILENO < fd);
+  ASSERT (write (fd, "hi", 2) == 2);
+  ASSERT (close (fd) == 0);
+
+  /* Four iterations, with progressively more standard descriptors
+     closed.  */
+  for (i = -1; i <= STDERR_FILENO; i++)
+    {
+      ASSERT (fchdir (dfd) == 0);
+      if (0 <= i)
+        ASSERT (close (i) == 0);
+
+      /* Execute once in ".", once in "..".  */
+      for (j = 0; j <= 1; j++)
+        {
+          if (j)
+            ASSERT (chdir ("..") == 0);
+
+          /* Check for error detection.  */
+          errno = 0;
+          ASSERT (openat (AT_FDCWD, "", O_RDONLY) == -1);
+          ASSERT (errno == ENOENT);
+          errno = 0;
+          ASSERT (openat (dfd, "", O_RDONLY) == -1);
+          ASSERT (errno == ENOENT);
+          errno = 0;
+          ASSERT (openat (-1, ".", O_RDONLY) == -1);
+          ASSERT (errno == EBADF);
+
+          /* Check for trailing slash and /dev/null handling.  */
+          errno = 0;
+          ASSERT (openat (dfd, "nonexist.ent/", O_CREAT | O_RDONLY,
+                          S_IRUSR | S_IWUSR) == -1);
+          ASSERT (errno == ENOTDIR || errno == EISDIR || errno == ENOENT
+                  || errno == EINVAL);
+          errno = 0;
+          ASSERT (openat (dfd, witness "/", O_RDONLY) == -1);
+          ASSERT (errno == ENOTDIR || errno == EISDIR || errno == EINVAL);
+#if defined __linux__ || defined __ANDROID__
+          /* Using a bad directory is okay for absolute paths.  */
+          fd = openat (-1, "/dev/null", O_WRONLY);
+          ASSERT (STDERR_FILENO < fd);
+#endif
+          /* Using a non-directory is wrong for relative paths.  */
+          errno = 0;
+          fd = open ("/dev/null", O_RDONLY);
+          ASSERT (STDERR_FILENO < fd);
+          ASSERT (openat (fd, ".", O_RDONLY) == -1);
+          ASSERT (errno == EBADF || errno == ENOTDIR);
+          ASSERT (close (fd) == 0);
+
+          /* Check for our witness file.  */
+          fd = openat (dfd, witness, O_RDONLY | O_NOFOLLOW);
+          ASSERT (STDERR_FILENO < fd);
+          ASSERT (read (fd, buf, 2) == 2);
+          ASSERT (buf[0] == 'h' && buf[1] == 'i');
+          ASSERT (close (fd) == 0);
+        }
+    }
+  ASSERT (fchdir (dfd) == 0);
+  ASSERT (unlink (witness) == 0);
+  ASSERT (close (dfd) == 0);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-openat.c b/src/grep/gnulib-tests/test-openat.c
new file mode 100644
index 0000000..d876a77
--- /dev/null
+++ b/src/grep/gnulib-tests/test-openat.c
@@ -0,0 +1,99 @@
+/* Test that openat works.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <fcntl.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (openat, int, (int, char const *, int, ...));
+
+#include <errno.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#define BASE "test-openat.t"
+
+#include "test-open.h"
+
+static int dfd = AT_FDCWD;
+
+/* Wrapper around openat to test open behavior.  */
+static int
+do_open (char const *name, int flags, ...)
+{
+  if (flags & O_CREAT)
+    {
+      mode_t mode = 0;
+      va_list arg;
+      va_start (arg, flags);
+
+      /* We have to use PROMOTED_MODE_T instead of mode_t, otherwise GCC 4
+         creates crashing code when 'mode_t' is smaller than 'int'.  */
+      mode = va_arg (arg, PROMOTED_MODE_T);
+
+      va_end (arg);
+      return openat (dfd, name, flags, mode);
+    }
+  return openat (dfd, name, flags);
+}
+
+int
+main (int argc _GL_UNUSED, char *argv[])
+{
+  int result;
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    errno = 0;
+    ASSERT (openat (-1, "foo", O_RDONLY) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    close (99);
+    errno = 0;
+    ASSERT (openat (99, "foo", O_RDONLY) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  /* Basic checks.  */
+  result = test_open (do_open, false);
+  dfd = open (".", O_RDONLY);
+  ASSERT (0 <= dfd);
+  ASSERT (test_open (do_open, false) == result);
+  ASSERT (close (dfd) == 0);
+
+  /* Check that even when *-safer modules are in use, plain openat can
+     land in fd 0.  Do this test last, since it is destructive to
+     stdin.  */
+  ASSERT (close (STDIN_FILENO) == 0);
+  ASSERT (openat (AT_FDCWD, ".", O_RDONLY) == STDIN_FILENO);
+  {
+    dfd = open (".", O_RDONLY);
+    ASSERT (STDIN_FILENO < dfd);
+    ASSERT (chdir ("..") == 0);
+    ASSERT (close (STDIN_FILENO) == 0);
+    ASSERT (openat (dfd, ".", O_RDONLY) == STDIN_FILENO);
+    ASSERT (close (dfd) == 0);
+  }
+  return result;
+}
diff --git a/src/grep/gnulib-tests/test-pathmax.c b/src/grep/gnulib-tests/test-pathmax.c
new file mode 100644
index 0000000..2ba1cc2
--- /dev/null
+++ b/src/grep/gnulib-tests/test-pathmax.c
@@ -0,0 +1,32 @@
+/* Test of "pathmax.h".
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include "pathmax.h"
+
+/* Check that PATH_MAX is a constant if it is defined.  */
+#ifdef PATH_MAX
+int a = PATH_MAX;
+#endif
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-perror.c b/src/grep/gnulib-tests/test-perror.c
new file mode 100644
index 0000000..1012396
--- /dev/null
+++ b/src/grep/gnulib-tests/test-perror.c
@@ -0,0 +1,36 @@
+/* Test of perror() function.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (perror, void, (char const *));
+
+#include <errno.h>
+
+int
+main (int argc, char **argv)
+{
+  const char *prefix = (argc > 1 ? argv[1] : NULL);
+
+  errno = EACCES;    perror (prefix);
+  errno = ETIMEDOUT; perror (prefix);
+  errno = EOVERFLOW; perror (prefix);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-perror.sh b/src/grep/gnulib-tests/test-perror.sh
new file mode 100755
index 0000000..e776609
--- /dev/null
+++ b/src/grep/gnulib-tests/test-perror.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+: ${srcdir=.}
+. "$srcdir/init.sh"; path_prepend_ .
+
+# Test NULL prefix. Result should not contain a number, except in lines that
+# start with 'EDC' (IBM z/OS libc produces an error identifier before the
+# error message).
+${CHECKER} test-perror 2>&1 >/dev/null | LC_ALL=C tr -d '\r' > t-perror.tmp
+grep -v '^EDC' t-perror.tmp | grep '[0-9]' > /dev/null \
+  && fail_ "result should not contain a number"
+
+# Test empty prefix. Result should be the same.
+${CHECKER} test-perror '' 2>&1 >/dev/null | LC_ALL=C tr -d '\r' > t-perror1.tmp
+diff t-perror.tmp t-perror1.tmp \
+  || fail_ "empty prefix should behave like NULL argument"
+
+# Test non-empty prefix.
+${CHECKER} test-perror foo 2>&1 >/dev/null | LC_ALL=C tr -d '\r' > t-perror3.tmp
+sed -e 's/^/foo: /' < t-perror.tmp > t-perror2.tmp
+diff t-perror2.tmp t-perror3.tmp || fail_ "prefix applied incorrectly"
+
+# Test exit status.
+${CHECKER} test-perror >out 2>/dev/null || fail_ "unexpected exit status"
+test -s out && fail_ "unexpected output"
+
+Exit 0
diff --git a/src/grep/gnulib-tests/test-perror2.c b/src/grep/gnulib-tests/test-perror2.c
new file mode 100644
index 0000000..adce4a6
--- /dev/null
+++ b/src/grep/gnulib-tests/test-perror2.c
@@ -0,0 +1,133 @@
+/* Test of perror() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+/* This test intentionally parses stderr.  So, we arrange to have fd 10
+   (outside the range of interesting fd's during the test) set up to
+   duplicate the original stderr.  */
+#define BACKUP_STDERR_FILENO 10
+#define ASSERT_STREAM myerr
+#include "macros.h"
+
+static FILE *myerr;
+
+#define BASE "test-perror2"
+
+int
+main (void)
+{
+  /* We change fd 2 later, so save it in fd 10.  */
+  if (dup2 (STDERR_FILENO, BACKUP_STDERR_FILENO) != BACKUP_STDERR_FILENO
+      || (myerr = fdopen (BACKUP_STDERR_FILENO, "w")) == NULL)
+    return 2;
+
+  ASSERT (freopen (BASE ".tmp", "w+", stderr) == stderr);
+
+  /* Test that perror does not clobber strerror buffer.  */
+  {
+    const char *msg1;
+    const char *msg2;
+    const char *msg3;
+    const char *msg4;
+    char *str1;
+    char *str2;
+    char *str3;
+    char *str4;
+
+    msg1 = strerror (ENOENT);
+    ASSERT (msg1);
+    str1 = strdup (msg1);
+    ASSERT (str1);
+
+    msg2 = strerror (ERANGE);
+    ASSERT (msg2);
+    str2 = strdup (msg2);
+    ASSERT (str2);
+
+    msg3 = strerror (-4);
+    ASSERT (msg3);
+    str3 = strdup (msg3);
+    ASSERT (str3);
+
+    msg4 = strerror (1729576);
+    ASSERT (msg4);
+    str4 = strdup (msg4);
+    ASSERT (str4);
+
+    errno = EACCES;
+    perror ("");
+    errno = -5;
+    perror ("");
+    ASSERT (!ferror (stderr));
+    ASSERT (STREQ (msg4, str4));
+
+    free (str1);
+    free (str2);
+    free (str3);
+    free (str4);
+  }
+
+  /* Test that perror uses the same message as strerror.  */
+  {
+    int errs[] = { EACCES, 0, -3, };
+    int i;
+    for (i = 0; i < SIZEOF (errs); i++)
+      {
+        char buf[256];
+        const char *err = strerror (errs[i]);
+
+        ASSERT (err);
+        ASSERT (strlen (err) < sizeof buf);
+        rewind (stderr);
+        ASSERT (ftruncate (fileno (stderr), 0) == 0);
+        errno = errs[i];
+        perror (NULL);
+        ASSERT (!ferror (stderr));
+        rewind (stderr);
+        ASSERT (fgets (buf, sizeof buf, stderr) == buf);
+        ASSERT (strstr (buf, err));
+      }
+  }
+
+  /* Test that perror reports write failure.  */
+  {
+    ASSERT (freopen (BASE ".tmp", "r", stderr) == stderr);
+    ASSERT (setvbuf (stderr, NULL, _IONBF, BUFSIZ) == 0);
+    errno = -1;
+    ASSERT (!ferror (stderr));
+    perror (NULL);
+#if 0
+    /* Commented out until cygwin behaves:
+       https://sourceware.org/ml/newlib/2011/msg00228.html */
+    ASSERT (errno > 0);
+    /* Commented out until glibc behaves:
+       https://sourceware.org/bugzilla/show_bug.cgi?id=12792 */
+    ASSERT (ferror (stderr));
+#endif
+  }
+
+  ASSERT (fclose (stderr) == 0);
+  ASSERT (remove (BASE ".tmp") == 0);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-pipe.c b/src/grep/gnulib-tests/test-pipe.c
new file mode 100644
index 0000000..5ae2a0a
--- /dev/null
+++ b/src/grep/gnulib-tests/test-pipe.c
@@ -0,0 +1,108 @@
+/* Test of pipe.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (pipe, int, (int[2]));
+
+#include <fcntl.h>
+#include <stdbool.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Get declarations of the native Windows API functions.  */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+/* Get _get_osfhandle.  */
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+#endif
+
+#include "binary-io.h"
+#include "macros.h"
+
+/* Return true if FD is open.  */
+static bool
+is_open (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  /* On native Windows, the initial state of unassigned standard file
+     descriptors is that they are open but point to an
+     INVALID_HANDLE_VALUE, and there is no fcntl.  */
+  return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
+#else
+# ifndef F_GETFL
+#  error Please port fcntl to your platform
+# endif
+  return 0 <= fcntl (fd, F_GETFL);
+#endif
+}
+
+/* Return true if FD is not inherited to child processes.  */
+static bool
+is_cloexec (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  HANDLE h = (HANDLE) _get_osfhandle (fd);
+  DWORD flags;
+  ASSERT (GetHandleInformation (h, &flags));
+  return (flags & HANDLE_FLAG_INHERIT) == 0;
+#else
+  int flags;
+  ASSERT ((flags = fcntl (fd, F_GETFD)) >= 0);
+  return (flags & FD_CLOEXEC) != 0;
+#endif
+}
+
+/* Return true if FD is in non-blocking mode.  */
+static bool
+is_nonblocking (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  /* We don't use the non-blocking mode for sockets here.  */
+  return 0;
+#else
+  int flags;
+  ASSERT ((flags = fcntl (fd, F_GETFL)) >= 0);
+  return (flags & O_NONBLOCK) != 0;
+#endif
+}
+
+int
+main ()
+{
+  int fd[2];
+
+  fd[0] = -1;
+  fd[1] = -1;
+  ASSERT (pipe (fd) >= 0);
+  ASSERT (fd[0] >= 0);
+  ASSERT (fd[1] >= 0);
+  ASSERT (fd[0] != fd[1]);
+  ASSERT (is_open (fd[0]));
+  ASSERT (is_open (fd[1]));
+  ASSERT (!is_cloexec (fd[0]));
+  ASSERT (!is_cloexec (fd[1]));
+  ASSERT (!is_nonblocking (fd[0]));
+  ASSERT (!is_nonblocking (fd[1]));
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-pthread-thread.c b/src/grep/gnulib-tests/test-pthread-thread.c
new file mode 100644
index 0000000..094e8d1
--- /dev/null
+++ b/src/grep/gnulib-tests/test-pthread-thread.c
@@ -0,0 +1,73 @@
+/* Test of pthread_create () function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include <pthread.h>
+
+#include <stdio.h>
+#include <string.h>
+
+#include "macros.h"
+
+static pthread_t main_thread_before;
+static pthread_t main_thread_after;
+static pthread_t worker_thread;
+
+#define MAGIC ((void *) 1266074729)
+static volatile int work_done;
+
+static void *
+worker_thread_func (void *arg)
+{
+  work_done = 1;
+  return MAGIC;
+}
+
+int
+main ()
+{
+  main_thread_before = pthread_self ();
+
+  if (pthread_create (&worker_thread, NULL, worker_thread_func, NULL) == 0)
+    {
+      void *ret;
+
+      /* Check that pthread_self () has the same value before than after the
+         first call to pthread_create ().  */
+      main_thread_after = pthread_self ();
+      ASSERT (memcmp (&main_thread_before, &main_thread_after,
+                      sizeof (pthread_t))
+              == 0);
+
+      ASSERT (pthread_join (worker_thread, &ret) == 0);
+
+      /* Check the return value of the thread.  */
+      ASSERT (ret == MAGIC);
+
+      /* Check that worker_thread_func () has finished executing.  */
+      ASSERT (work_done);
+
+      return 0;
+    }
+  else
+    {
+      fputs ("pthread_create failed\n", stderr);
+      return 1;
+    }
+}
diff --git a/src/grep/gnulib-tests/test-pthread.c b/src/grep/gnulib-tests/test-pthread.c
new file mode 100644
index 0000000..89c68dc
--- /dev/null
+++ b/src/grep/gnulib-tests/test-pthread.c
@@ -0,0 +1,90 @@
+/* Test of <pthread.h> substitute.
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+#include <pthread.h>
+
+#include "verify.h"
+
+/* Check that the types are all defined.  */
+
+pthread_t t1;
+pthread_attr_t t2;
+
+pthread_once_t t3 = PTHREAD_ONCE_INIT;
+
+pthread_mutex_t t4 = PTHREAD_MUTEX_INITIALIZER;
+pthread_mutexattr_t t5;
+
+pthread_rwlock_t t6 = PTHREAD_RWLOCK_INITIALIZER;
+pthread_rwlockattr_t t7;
+
+pthread_cond_t t8 = PTHREAD_COND_INITIALIZER;
+pthread_condattr_t t9;
+
+pthread_key_t t10;
+
+pthread_spinlock_t t11;
+
+#ifdef TODO /* Not implemented in gnulib yet */
+pthread_barrier_t t12;
+pthread_barrierattr_t t13;
+#endif
+
+/* Check that the various macros are defined.  */
+
+/* Constants for pthread_attr_setdetachstate().  */
+int ds[] = { PTHREAD_CREATE_JOINABLE, PTHREAD_CREATE_DETACHED };
+
+/* Constants for pthread_exit().  */
+void *canceled = PTHREAD_CANCELED;
+
+/* Constants for pthread_mutexattr_settype().  */
+int mt[] = {
+  PTHREAD_MUTEX_DEFAULT,
+  PTHREAD_MUTEX_NORMAL,
+  PTHREAD_MUTEX_RECURSIVE,
+  PTHREAD_MUTEX_ERRORCHECK
+};
+
+#ifdef TODO /* Not implemented in gnulib yet */
+
+/* Constants for pthread_mutexattr_setrobust().  */
+int mr[] = { PTHREAD_MUTEX_ROBUST, PTHREAD_MUTEX_STALLED };
+
+/* Constants for pthread_barrierattr_setpshared().  */
+int bp[] = { PTHREAD_PROCESS_SHARED, PTHREAD_PROCESS_PRIVATE };
+
+/* Constants for pthread_barrier_wait().  */
+int bw[] = { PTHREAD_BARRIER_SERIAL_THREAD };
+
+/* Constants for pthread_setcancelstate().  */
+int cs[] = { PTHREAD_CANCEL_ENABLE, PTHREAD_CANCEL_DISABLE };
+
+/* Constants for pthread_setcanceltype().  */
+int ct[] = { PTHREAD_CANCEL_DEFERRED, PTHREAD_CANCEL_ASYNCHRONOUS };
+
+#endif
+
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-pthread_sigmask1.c b/src/grep/gnulib-tests/test-pthread_sigmask1.c
new file mode 100644
index 0000000..f12b17c
--- /dev/null
+++ b/src/grep/gnulib-tests/test-pthread_sigmask1.c
@@ -0,0 +1,95 @@
+/* Test of pthread_sigmask in a single-threaded program.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include <signal.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (pthread_sigmask, int, (int, const sigset_t *, sigset_t *));
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#if !(defined _WIN32 && !defined __CYGWIN__)
+
+static volatile int sigint_occurred;
+
+static void
+sigint_handler (int sig)
+{
+  sigint_occurred++;
+}
+
+int
+main (int argc, char *argv[])
+{
+  sigset_t set;
+  int pid = getpid ();
+  char command[80];
+
+  signal (SIGINT, sigint_handler);
+
+  sigemptyset (&set);
+  sigaddset (&set, SIGINT);
+
+  /* Check error handling.  */
+  ASSERT (pthread_sigmask (1729, &set, NULL) == EINVAL);
+
+  /* Block SIGINT.  */
+  ASSERT (pthread_sigmask (SIG_BLOCK, &set, NULL) == 0);
+
+  /* Request a SIGINT signal from outside.  */
+  sprintf (command, "sh -c 'sleep 1; kill -%d %d' &", SIGINT, pid);
+  ASSERT (system (command) == 0);
+
+  /* Wait.  */
+  sleep (2);
+
+  /* The signal should not have arrived yet, because it is blocked.  */
+  ASSERT (sigint_occurred == 0);
+
+  /* Unblock SIGINT.  */
+  ASSERT (pthread_sigmask (SIG_UNBLOCK, &set, NULL) == 0);
+
+  /* The signal should have arrived now, because POSIX says
+       "If there are any pending unblocked signals after the call to
+        pthread_sigmask(), at least one of those signals shall be delivered
+        before the call to pthread_sigmask() returns."  */
+  ASSERT (sigint_occurred == 1);
+
+  return 0;
+}
+
+#else
+
+/* On native Windows, getpid() values and the arguments that are passed to
+   the (Cygwin?) 'kill' program are not necessarily related.  */
+
+int
+main ()
+{
+  fputs ("Skipping test: native Windows platform\n", stderr);
+  return 77;
+}
+
+#endif
diff --git a/src/grep/gnulib-tests/test-pthread_sigmask2.c b/src/grep/gnulib-tests/test-pthread_sigmask2.c
new file mode 100644
index 0000000..f57fc93
--- /dev/null
+++ b/src/grep/gnulib-tests/test-pthread_sigmask2.c
@@ -0,0 +1,105 @@
+/* Test of pthread_sigmask in a multi-threaded program.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include <signal.h>
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#if USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS
+
+static pthread_t main_thread;
+static pthread_t killer_thread;
+
+static void *
+killer_thread_func (void *arg)
+{
+  sleep (1);
+  pthread_kill (main_thread, SIGINT);
+  return NULL;
+}
+
+static volatile int sigint_occurred;
+
+static void
+sigint_handler (int sig)
+{
+  sigint_occurred++;
+}
+
+int
+main (int argc, char *argv[])
+{
+  sigset_t set;
+
+  signal (SIGINT, sigint_handler);
+
+  sigemptyset (&set);
+  sigaddset (&set, SIGINT);
+
+  /* Check error handling.  */
+  /* This call returns 0 on NetBSD 8.0.  */
+#if !defined __NetBSD__
+  ASSERT (pthread_sigmask (1729, &set, NULL) == EINVAL);
+#endif
+
+  /* Block SIGINT.  */
+  ASSERT (pthread_sigmask (SIG_BLOCK, &set, NULL) == 0);
+
+  /* Request a SIGINT signal from another thread.  */
+  main_thread = pthread_self ();
+  ASSERT (pthread_create (&killer_thread, NULL, killer_thread_func, NULL) == 0);
+
+  /* Wait.  */
+  sleep (2);
+
+  /* The signal should not have arrived yet, because it is blocked.  */
+  ASSERT (sigint_occurred == 0);
+
+  /* Unblock SIGINT.  */
+  ASSERT (pthread_sigmask (SIG_UNBLOCK, &set, NULL) == 0);
+
+  /* The signal should have arrived now, because POSIX says
+       "If there are any pending unblocked signals after the call to
+        pthread_sigmask(), at least one of those signals shall be delivered
+        before the call to pthread_sigmask() returns."  */
+  ASSERT (sigint_occurred == 1);
+
+  /* Clean up the thread.  This avoid a "ThreadSanitizer: thread leak" warning
+     from "gcc -fsanitize=thread".  */
+  ASSERT (pthread_join (killer_thread, NULL) == 0);
+
+  return 0;
+}
+
+#else
+
+int
+main ()
+{
+  fputs ("Skipping test: POSIX threads not enabled\n", stderr);
+  return 77;
+}
+
+#endif
diff --git a/src/grep/gnulib-tests/test-quotearg-simple.c b/src/grep/gnulib-tests/test-quotearg-simple.c
new file mode 100644
index 0000000..795e30f
--- /dev/null
+++ b/src/grep/gnulib-tests/test-quotearg-simple.c
@@ -0,0 +1,366 @@
+/* Test of quotearg family of functions.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2008.  */
+
+#include <config.h>
+
+#include "quotearg.h"
+
+#include <ctype.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "localcharset.h"
+#include "macros.h"
+#include "zerosize-ptr.h"
+
+#include "test-quotearg.h"
+
+static struct result_groups results_g[] = {
+  /* literal_quoting_style */
+  { { "", "\0""1\0", 3, "simple", " \t\n'\"\033?""?/\\", "a:b", "a\\b",
+      "a' b", LQ RQ, LQ RQ },
+    { "", "1", 1, "simple", " \t\n'\"\033?""?/\\", "a:b", "a\\b",
+      "a' b", LQ RQ, LQ RQ },
+    { "", "1", 1, "simple", " \t\n'\"\033?""?/\\", "a:b", "a\\b",
+      "a' b", LQ RQ, LQ RQ } },
+
+  /* shell_quoting_style */
+  { { "''", "\0""1\0", 3, "simple", "' \t\n'\\''\"\033?""?/\\'", "a:b",
+      "'a\\b'", "\"a' b\"", LQ RQ, LQ RQ },
+    { "''", "1", 1, "simple", "' \t\n'\\''\"\033?""?/\\'", "a:b",
+      "'a\\b'", "\"a' b\"", LQ RQ, LQ RQ },
+    { "''", "1", 1, "simple", "' \t\n'\\''\"\033?""?/\\'", "'a:b'",
+      "'a\\b'", "\"a' b\"", LQ RQ, LQ RQ } },
+
+  /* shell_always_quoting_style */
+  { { "''", "'\0""1\0'", 5, "'simple'", "' \t\n'\\''\"\033?""?/\\'", "'a:b'",
+      "'a\\b'", "\"a' b\"", "'" LQ RQ "'", "'" LQ RQ "'" },
+    { "''", "'1'", 3, "'simple'", "' \t\n'\\''\"\033?""?/\\'", "'a:b'",
+      "'a\\b'", "\"a' b\"", "'" LQ RQ "'", "'" LQ RQ "'" },
+    { "''", "'1'", 3, "'simple'", "' \t\n'\\''\"\033?""?/\\'", "'a:b'",
+      "'a\\b'", "\"a' b\"", "'" LQ RQ "'", "'" LQ RQ "'" } },
+
+  /* shell_escape_quoting_style */
+  { { "''", "''$'\\0''1'$'\\0'", 15, "simple",
+      "' '$'\\t\\n'\\''\"'$'\\033''?""?/\\'", "a:b",
+      "'a\\b'", "\"a' b\"", "''$'" LQ_ENC RQ_ENC "'", LQ RQ },
+    { "''", "''$'\\0''1'$'\\0'", 15, "simple",
+      "' '$'\\t\\n'\\''\"'$'\\033''?""?/\\'", "a:b",
+      "'a\\b'", "\"a' b\"", "''$'" LQ_ENC RQ_ENC "'", LQ RQ },
+    { "''", "''$'\\0''1'$'\\0'", 15, "simple",
+      "' '$'\\t\\n'\\''\"'$'\\033''?""?/\\'", "'a:b'",
+      "'a\\b'", "\"a' b\"", "''$'" LQ_ENC RQ_ENC "'", LQ RQ } },
+
+  /* shell_escape_always_quoting_style */
+  { { "''", "''$'\\0''1'$'\\0'", 15, "'simple'",
+      "' '$'\\t\\n'\\''\"'$'\\033''?""?/\\'", "'a:b'",
+      "'a\\b'", "\"a' b\"", "''$'" LQ_ENC RQ_ENC "'", "'" LQ RQ "'" },
+    { "''", "''$'\\0''1'$'\\0'", 15, "'simple'",
+      "' '$'\\t\\n'\\''\"'$'\\033''?""?/\\'", "'a:b'",
+      "'a\\b'", "\"a' b\"", "''$'" LQ_ENC RQ_ENC "'", "'" LQ RQ "'" },
+    { "''", "''$'\\0''1'$'\\0'", 15, "'simple'",
+      "' '$'\\t\\n'\\''\"'$'\\033''?""?/\\'", "'a:b'",
+      "'a\\b'", "\"a' b\"", "''$'" LQ_ENC RQ_ENC "'", "'" LQ RQ "'" } },
+
+  /* c_quoting_style */
+  { { "\"\"", "\"\\0001\\0\"", 9, "\"simple\"",
+      "\" \\t\\n'\\\"\\033?""?/\\\\\"", "\"a:b\"", "\"a\\\\b\"",
+      "\"a' b\"", "\"" LQ_ENC RQ_ENC "\"", "\"" LQ RQ "\"" },
+    { "\"\"", "\"\\0001\\0\"", 9, "\"simple\"",
+      "\" \\t\\n'\\\"\\033?""?/\\\\\"", "\"a:b\"", "\"a\\\\b\"",
+      "\"a' b\"", "\"" LQ_ENC RQ_ENC "\"", "\"" LQ RQ "\"" },
+    { "\"\"", "\"\\0001\\0\"", 9, "\"simple\"",
+      "\" \\t\\n'\\\"\\033?""?/\\\\\"", "\"a\\:b\"", "\"a\\\\b\"",
+      "\"a' b\"", "\"" LQ_ENC RQ_ENC "\"", "\"" LQ RQ "\"" } },
+
+  /* c_maybe_quoting_style */
+  { { "", "\"\\0001\\0\"", 9, "simple", "\" \\t\\n'\\\"\\033?""?/\\\\\"",
+      "a:b", "a\\b", "a' b", "\"" LQ_ENC RQ_ENC "\"", LQ RQ },
+    { "", "\"\\0001\\0\"", 9, "simple", "\" \\t\\n'\\\"\\033?""?/\\\\\"",
+      "a:b", "a\\b", "a' b", "\"" LQ_ENC RQ_ENC "\"", LQ RQ },
+    { "", "\"\\0001\\0\"", 9, "simple", "\" \\t\\n'\\\"\\033?""?/\\\\\"",
+      "\"a:b\"", "a\\b", "a' b", "\"" LQ_ENC RQ_ENC "\"", LQ RQ } },
+
+  /* escape_quoting_style */
+  { { "", "\\0001\\0", 7, "simple", " \\t\\n'\"\\033?""?/\\\\", "a:b",
+      "a\\\\b", "a' b", LQ_ENC RQ_ENC, LQ RQ },
+    { "", "\\0001\\0", 7, "simple", " \\t\\n'\"\\033?""?/\\\\", "a:b",
+      "a\\\\b", "a' b", LQ_ENC RQ_ENC, LQ RQ },
+    { "", "\\0001\\0", 7, "simple", " \\t\\n'\"\\033?""?/\\\\", "a\\:b",
+      "a\\\\b", "a' b", LQ_ENC RQ_ENC, LQ RQ } },
+
+  /* locale_quoting_style */
+  { { "''", "'\\0001\\0'", 9, "'simple'", "' \\t\\n\\'\"\\033?""?/\\\\'",
+      "'a:b'", "'a\\\\b'", "'a\\' b'", "'" LQ_ENC RQ_ENC "'", "'" LQ RQ "'" },
+    { "''", "'\\0001\\0'", 9, "'simple'", "' \\t\\n\\'\"\\033?""?/\\\\'",
+      "'a:b'", "'a\\\\b'", "'a\\' b'", "'" LQ_ENC RQ_ENC "'", "'" LQ RQ "'" },
+    { "''", "'\\0001\\0'", 9, "'simple'", "' \\t\\n\\'\"\\033?""?/\\\\'",
+      "'a\\:b'", "'a\\\\b'", "'a\\' b'",
+      "'" LQ_ENC RQ_ENC "'", "'" LQ RQ "'" } },
+
+  /* clocale_quoting_style */
+  { { "\"\"", "\"\\0001\\0\"", 9, "\"simple\"",
+      "\" \\t\\n'\\\"\\033?""?/\\\\\"", "\"a:b\"", "\"a\\\\b\"",
+      "\"a' b\"", "\"" LQ_ENC RQ_ENC "\"", "\"" LQ RQ "\"" },
+    { "\"\"", "\"\\0001\\0\"", 9, "\"simple\"",
+      "\" \\t\\n'\\\"\\033?""?/\\\\\"", "\"a:b\"", "\"a\\\\b\"",
+      "\"a' b\"", "\"" LQ_ENC RQ_ENC "\"", "\"" LQ RQ "\"" },
+    { "\"\"", "\"\\0001\\0\"", 9, "\"simple\"",
+      "\" \\t\\n'\\\"\\033?""?/\\\\\"", "\"a\\:b\"", "\"a\\\\b\"",
+      "\"a' b\"", "\"" LQ_ENC RQ_ENC "\"", "\"" LQ RQ "\"" } }
+};
+
+static struct result_groups flag_results[] = {
+  /* literal_quoting_style and QA_ELIDE_NULL_BYTES */
+  { { "", "1", 1, "simple", " \t\n'\"\033?""?/\\", "a:b", "a\\b", "a' b",
+      LQ RQ, LQ RQ },
+    { "", "1", 1, "simple", " \t\n'\"\033?""?/\\", "a:b", "a\\b", "a' b",
+      LQ RQ, LQ RQ },
+    { "", "1", 1, "simple", " \t\n'\"\033?""?/\\", "a:b", "a\\b", "a' b",
+      LQ RQ, LQ RQ } },
+
+  /* c_quoting_style and QA_ELIDE_OUTER_QUOTES */
+  { { "", "\"\\0001\\0\"", 9, "simple", "\" \\t\\n'\\\"\\033?""?/\\\\\"",
+      "a:b", "a\\b", "a' b", "\"" LQ_ENC RQ_ENC "\"", LQ RQ },
+    { "", "\"\\0001\\0\"", 9, "simple", "\" \\t\\n'\\\"\\033?""?/\\\\\"",
+      "a:b", "a\\b", "a' b", "\"" LQ_ENC RQ_ENC "\"", LQ RQ },
+    { "", "\"\\0001\\0\"", 9, "simple", "\" \\t\\n'\\\"\\033?""?/\\\\\"",
+      "\"a:b\"", "a\\b", "a' b", "\"" LQ_ENC RQ_ENC "\"", LQ RQ } },
+
+  /* c_quoting_style and QA_SPLIT_TRIGRAPHS */
+  { { "\"\"", "\"\\0001\\0\"", 9, "\"simple\"",
+      "\" \\t\\n'\\\"\\033?\"\"?/\\\\\"", "\"a:b\"", "\"a\\\\b\"",
+      "\"a' b\"", "\"" LQ_ENC RQ_ENC "\"", "\"" LQ RQ "\"" },
+    { "\"\"", "\"\\0001\\0\"", 9, "\"simple\"",
+      "\" \\t\\n'\\\"\\033?\"\"?/\\\\\"", "\"a:b\"", "\"a\\\\b\"",
+      "\"a' b\"", "\"" LQ_ENC RQ_ENC "\"", "\"" LQ RQ "\"" },
+    { "\"\"", "\"\\0001\\0\"", 9, "\"simple\"",
+      "\" \\t\\n'\\\"\\033?\"\"?/\\\\\"", "\"a\\:b\"", "\"a\\\\b\"",
+      "\"a' b\"", "\"" LQ_ENC RQ_ENC "\"", "\"" LQ RQ "\"" } }
+};
+
+static char const *custom_quotes[][2] = {
+  { "", ""  },
+  { "'", "'"  },
+  { "(", ")"  },
+  { ":", " "  },
+  { " ", ":"  },
+  { "# ", "\n" },
+  { "\"'", "'\"" }
+};
+
+static struct result_groups custom_results[] = {
+  /* left_quote = right_quote = "" */
+  { { "", "\\0001\\0", 7, "simple",
+      " \\t\\n'\"\\033?""?/\\\\", "a:b", "a\\\\b",
+      "a' b", LQ_ENC RQ_ENC, LQ RQ },
+    { "", "\\0001\\0", 7, "simple",
+      " \\t\\n'\"\\033?""?/\\\\", "a:b", "a\\\\b",
+      "a' b", LQ_ENC RQ_ENC, LQ RQ },
+    { "", "\\0001\\0", 7, "simple",
+      " \\t\\n'\"\\033?""?/\\\\", "a\\:b", "a\\\\b",
+      "a' b", LQ_ENC RQ_ENC, LQ RQ } },
+
+  /* left_quote = right_quote = "'" */
+  { { "''", "'\\0001\\0'", 9, "'simple'",
+      "' \\t\\n\\'\"\\033?""?/\\\\'", "'a:b'", "'a\\\\b'",
+      "'a\\' b'", "'" LQ_ENC RQ_ENC "'", "'" LQ RQ "'" },
+    { "''", "'\\0001\\0'", 9, "'simple'",
+      "' \\t\\n\\'\"\\033?""?/\\\\'", "'a:b'", "'a\\\\b'",
+      "'a\\' b'", "'" LQ_ENC RQ_ENC "'", "'" LQ RQ "'" },
+    { "''", "'\\0001\\0'", 9, "'simple'",
+      "' \\t\\n\\'\"\\033?""?/\\\\'", "'a\\:b'", "'a\\\\b'",
+      "'a\\' b'", "'" LQ_ENC RQ_ENC "'", "'" LQ RQ "'" } },
+
+  /* left_quote = "(" and right_quote = ")" */
+  { { "()", "(\\0001\\0)", 9, "(simple)",
+      "( \\t\\n'\"\\033?""?/\\\\)", "(a:b)", "(a\\\\b)",
+      "(a' b)", "(" LQ_ENC RQ_ENC ")", "(" LQ RQ ")" },
+    { "()", "(\\0001\\0)", 9, "(simple)",
+      "( \\t\\n'\"\\033?""?/\\\\)", "(a:b)", "(a\\\\b)",
+      "(a' b)", "(" LQ_ENC RQ_ENC ")", "(" LQ RQ ")" },
+    { "()", "(\\0001\\0)", 9, "(simple)",
+      "( \\t\\n'\"\\033?""?/\\\\)", "(a\\:b)", "(a\\\\b)",
+      "(a' b)", "(" LQ_ENC RQ_ENC ")", "(" LQ RQ ")" } },
+
+  /* left_quote = ":" and right_quote = " " */
+  { { ": ", ":\\0001\\0 ", 9, ":simple ",
+      ":\\ \\t\\n'\"\\033?""?/\\\\ ", ":a:b ", ":a\\\\b ",
+      ":a'\\ b ", ":" LQ_ENC RQ_ENC " ", ":" LQ RQ " " },
+    { ": ", ":\\0001\\0 ", 9, ":simple ",
+      ":\\ \\t\\n'\"\\033?""?/\\\\ ", ":a:b ", ":a\\\\b ",
+      ":a'\\ b ", ":" LQ_ENC RQ_ENC " ", ":" LQ RQ " " },
+    { ": ", ":\\0001\\0 ", 9, ":simple ",
+      ":\\ \\t\\n'\"\\033?""?/\\\\ ", ":a\\:b ", ":a\\\\b ",
+      ":a'\\ b ", ":" LQ_ENC RQ_ENC " ", ":" LQ RQ " " } },
+
+  /* left_quote = " " and right_quote = ":" */
+  { { " :", " \\0001\\0:", 9, " simple:",
+      "  \\t\\n'\"\\033?""?/\\\\:", " a\\:b:", " a\\\\b:",
+      " a' b:", " " LQ_ENC RQ_ENC ":", " " LQ RQ ":" },
+    { " :", " \\0001\\0:", 9, " simple:",
+      "  \\t\\n'\"\\033?""?/\\\\:", " a\\:b:", " a\\\\b:",
+      " a' b:", " " LQ_ENC RQ_ENC ":", " " LQ RQ ":" },
+    { " :", " \\0001\\0:", 9, " simple:",
+      "  \\t\\n'\"\\033?""?/\\\\:", " a\\:b:", " a\\\\b:",
+      " a' b:", " " LQ_ENC RQ_ENC ":", " " LQ RQ ":" } },
+
+  /* left_quote = "# " and right_quote = "\n" */
+  { { "# \n", "# \\0001\\0\n", 10, "# simple\n",
+      "#  \\t\\n'\"\\033?""?/\\\\\n", "# a:b\n", "# a\\\\b\n",
+      "# a' b\n", "# " LQ_ENC RQ_ENC "\n", "# " LQ RQ "\n" },
+    { "# \n", "# \\0001\\0\n", 10, "# simple\n",
+      "#  \\t\\n'\"\\033?""?/\\\\\n", "# a:b\n", "# a\\\\b\n",
+      "# a' b\n", "# " LQ_ENC RQ_ENC "\n", "# " LQ RQ "\n" },
+    { "# \n", "# \\0001\\0\n", 10, "# simple\n",
+      "#  \\t\\n'\"\\033?""?/\\\\\n", "# a\\:b\n", "# a\\\\b\n",
+      "# a' b\n", "# " LQ_ENC RQ_ENC "\n", "# " LQ RQ "\n" } },
+
+  /* left_quote = "\"'" and right_quote = "'\"" */
+  { { "\"''\"", "\"'\\0001\\0'\"", 11, "\"'simple'\"",
+      "\"' \\t\\n\\'\"\\033?""?/\\\\'\"", "\"'a:b'\"", "\"'a\\\\b'\"",
+      "\"'a' b'\"", "\"'" LQ_ENC RQ_ENC "'\"", "\"'" LQ RQ "'\"" },
+    { "\"''\"", "\"'\\0001\\0'\"", 11, "\"'simple'\"",
+      "\"' \\t\\n\\'\"\\033?""?/\\\\'\"", "\"'a:b'\"", "\"'a\\\\b'\"",
+      "\"'a' b'\"", "\"'" LQ_ENC RQ_ENC "'\"", "\"'" LQ RQ "'\"" },
+    { "\"''\"", "\"'\\0001\\0'\"", 11, "\"'simple'\"",
+      "\"' \\t\\n\\'\"\\033?""?/\\\\'\"", "\"'a\\:b'\"", "\"'a\\\\b'\"",
+      "\"'a' b'\"", "\"'" LQ_ENC RQ_ENC "'\"", "\"'" LQ RQ "'\"" } }
+};
+
+static char *
+use_quote_double_quotes (const char *str, size_t *len)
+{
+  char *p = *len == SIZE_MAX ? quotearg_char (str, '"')
+                               : quotearg_char_mem (str, *len, '"');
+  *len = strlen (p);
+  return p;
+}
+
+int
+main (int argc _GL_UNUSED, char *argv[])
+{
+  int i;
+  bool ascii_only = MB_CUR_MAX == 1 && !isprint ((unsigned char) LQ[0]);
+
+  /* This part of the program is hard-wired to the C locale since it
+     does not call setlocale.  However, according to POSIX, the use of
+     8-bit bytes in a character context in the C locale gives
+     unspecified results (that is, the C locale charset is allowed to
+     be unibyte with 8-bit bytes rejected [ASCII], unibyte with 8-bit
+     bytes being characters [often ISO-8859-1], or multibyte [often
+     UTF-8]).  We assume that the latter two cases will be
+     indistinguishable in this test - that is, the LQ and RQ sequences
+     will pass through unchanged in either type of charset.  So when
+     testing for quoting of str7, use the ascii_only flag to decide
+     what to expect for the 8-bit data being quoted.  */
+  ASSERT (!isprint ('\033'));
+  for (i = literal_quoting_style; i <= clocale_quoting_style; i++)
+    {
+      set_quoting_style (NULL, (enum quoting_style) i);
+      if (!(i == locale_quoting_style || i == clocale_quoting_style)
+          || (strcmp (locale_charset (), "ASCII") == 0
+              || strcmp (locale_charset (), "ANSI_X3.4-1968") == 0))
+        {
+          compare_strings (use_quotearg_buffer, &results_g[i].group1,
+                           ascii_only);
+          compare_strings (use_quotearg, &results_g[i].group2,
+                           ascii_only);
+          if (i == c_quoting_style)
+            compare_strings (use_quote_double_quotes, &results_g[i].group2,
+                             ascii_only);
+          compare_strings (use_quotearg_colon, &results_g[i].group3,
+                           ascii_only);
+        }
+    }
+
+  set_quoting_style (NULL, literal_quoting_style);
+  ASSERT (set_quoting_flags (NULL, QA_ELIDE_NULL_BYTES) == 0);
+  compare_strings (use_quotearg_buffer, &flag_results[0].group1, ascii_only);
+  compare_strings (use_quotearg, &flag_results[0].group2, ascii_only);
+  compare_strings (use_quotearg_colon, &flag_results[0].group3, ascii_only);
+
+  set_quoting_style (NULL, c_quoting_style);
+  ASSERT (set_quoting_flags (NULL, QA_ELIDE_OUTER_QUOTES)
+          == QA_ELIDE_NULL_BYTES);
+  compare_strings (use_quotearg_buffer, &flag_results[1].group1, ascii_only);
+  compare_strings (use_quotearg, &flag_results[1].group2, ascii_only);
+  compare_strings (use_quote_double_quotes, &flag_results[1].group2,
+                   ascii_only);
+  compare_strings (use_quotearg_colon, &flag_results[1].group3, ascii_only);
+
+  ASSERT (set_quoting_flags (NULL, QA_SPLIT_TRIGRAPHS)
+          == QA_ELIDE_OUTER_QUOTES);
+  compare_strings (use_quotearg_buffer, &flag_results[2].group1, ascii_only);
+  compare_strings (use_quotearg, &flag_results[2].group2, ascii_only);
+  compare_strings (use_quote_double_quotes, &flag_results[2].group2,
+                   ascii_only);
+  compare_strings (use_quotearg_colon, &flag_results[2].group3, ascii_only);
+
+  ASSERT (set_quoting_flags (NULL, 0) == QA_SPLIT_TRIGRAPHS);
+
+  for (i = 0; i < sizeof custom_quotes / sizeof *custom_quotes; ++i)
+    {
+      set_custom_quoting (NULL,
+                          custom_quotes[i][0], custom_quotes[i][1]);
+      compare_strings (use_quotearg_buffer, &custom_results[i].group1,
+                       ascii_only);
+      compare_strings (use_quotearg, &custom_results[i].group2, ascii_only);
+      compare_strings (use_quotearg_colon, &custom_results[i].group3,
+                       ascii_only);
+    }
+
+  {
+    /* Trigger the bug whereby quotearg_buffer would read beyond the NUL
+       that defines the end of the string being quoted.  Use an input
+       string whose NUL is the last byte before an unreadable page.  */
+    char *z = zerosize_ptr ();
+
+    if (z)
+      {
+        size_t q_len = 1024;
+        char *q = malloc (q_len + 1);
+        char buf[10];
+        memset (q, 'Q', q_len);
+        q[q_len] = 0;
+
+        /* Z points to the boundary between a readable/writable page
+           and one that is neither readable nor writable.  Position
+           our string so its NUL is at the end of the writable one.  */
+        char const *str = "____";
+        size_t s_len = strlen (str);
+        z -= s_len + 1;
+        memcpy (z, str, s_len + 1);
+
+        set_custom_quoting (NULL, q, q);
+        /* Whether this actually triggers a SEGV depends on the
+           implementation of memcmp: whether it compares only byte-at-
+           a-time, and from left to right (no SEGV) or some other way.  */
+        size_t n = quotearg_buffer (buf, sizeof buf, z, SIZE_MAX, NULL);
+        ASSERT (n == s_len + 2 * q_len);
+        ASSERT (memcmp (buf, q, sizeof buf) == 0);
+        free (q);
+      }
+  }
+
+  quotearg_free ();
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-quotearg.h b/src/grep/gnulib-tests/test-quotearg.h
new file mode 100644
index 0000000..065b54b
--- /dev/null
+++ b/src/grep/gnulib-tests/test-quotearg.h
@@ -0,0 +1,128 @@
+/* Test of quotearg family of functions.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2008.  */
+
+struct result_strings {
+  char const *str1; /* Translation of "".  */
+  char const *str2; /* Translation of "\0""1\0".  */
+  size_t len2; /* Length of str2.  */
+  char const *str3; /* Translation of "simple".  */
+  char const *str4; /* Translation of " \t\n'\"\033?""?/\\".  */
+  char const *str5; /* Translation of "a:b".  */
+  char const *str6; /* Translation of "a\\b".  */
+  char const *str7; /* Translation of "a' b".  */
+  char const *str8a; /* Translation of LQ RQ, in ASCII charset.  */
+  char const *str8b; /* Translation of LQ RQ, in Latin1 or UTF-8 charset.  */
+};
+
+struct result_groups {
+  struct result_strings group1; /* Via quotearg_buffer.  */
+  struct result_strings group2; /* Via quotearg{,_mem}.  */
+  struct result_strings group3; /* Via quotearg_colon{,_mem}.  */
+};
+
+/* These quotes are borrowed from a pt_PT.utf8 translation.  */
+# define LQ "\302\253"
+# define RQ "\302\273"
+# define LQ_ENC "\\302\\253"
+# define RQ_ENC "\\302\\273"
+# define RQ_ESC "\\\302\273"
+
+static struct result_strings inputs = {
+  "", "\0001\0", 3, "simple", " \t\n'\"\033?""?/\\", "a:b", "a\\b",
+  "a' b", LQ RQ, NULL
+};
+
+static void
+compare (char const *a, size_t la, char const *b, size_t lb)
+{
+  ASSERT (la == lb);
+  ASSERT (memcmp (a, b, la) == 0);
+  ASSERT (b[lb] == '\0');
+}
+
+static void
+compare_strings (char *(func) (char const *, size_t *),
+                 struct result_strings *results, bool ascii_only)
+{
+  size_t len;
+  char *p;
+
+  len = 0;
+  p = func (inputs.str1, &len);
+  compare (results->str1, strlen (results->str1), p, len);
+
+  len = inputs.len2;
+  p = func (inputs.str2, &len);
+  compare (results->str2, results->len2, p, len);
+
+  len = SIZE_MAX;
+  p = func (inputs.str3, &len);
+  compare (results->str3, strlen (results->str3), p, len);
+
+  len = strlen (inputs.str4);
+  p = func (inputs.str4, &len);
+  compare (results->str4, strlen (results->str4), p, len);
+
+  len = SIZE_MAX;
+  p = func (inputs.str5, &len);
+  compare (results->str5, strlen (results->str5), p, len);
+
+  len = strlen (inputs.str6);
+  p = func (inputs.str6, &len);
+  compare (results->str6, strlen (results->str6), p, len);
+
+  len = strlen (inputs.str7);
+  p = func (inputs.str7, &len);
+  compare (results->str7, strlen (results->str7), p, len);
+
+  len = strlen (inputs.str8a);
+  p = func (inputs.str8a, &len);
+  if (ascii_only)
+    compare (results->str8a, strlen (results->str8a), p, len);
+  else
+    compare (results->str8b, strlen (results->str8b), p, len);
+}
+
+static char *
+use_quotearg_buffer (const char *str, size_t *len)
+{
+  static char buf[100];
+  size_t size;
+  memset (buf, 0xa5, 100);
+  size = quotearg_buffer (buf, 100, str, *len, NULL);
+  *len = size;
+  ASSERT ((unsigned char) buf[size + 1] == 0xa5);
+  return buf;
+}
+
+static char *
+use_quotearg (const char *str, size_t *len)
+{
+  char *p = *len == SIZE_MAX ? quotearg (str) : quotearg_mem (str, *len);
+  *len = strlen (p);
+  return p;
+}
+
+static char *
+use_quotearg_colon (const char *str, size_t *len)
+{
+  char *p = (*len == SIZE_MAX ? quotearg_colon (str)
+             : quotearg_colon_mem (str, *len));
+  *len = strlen (p);
+  return p;
+}
diff --git a/src/grep/gnulib-tests/test-raise.c b/src/grep/gnulib-tests/test-raise.c
new file mode 100644
index 0000000..d7fe02b
--- /dev/null
+++ b/src/grep/gnulib-tests/test-raise.c
@@ -0,0 +1,51 @@
+/* Test raising a signal.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <signal.h>
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (raise, int, (int));
+
+#include <stdlib.h>
+
+#include "macros.h"
+
+/* It is safe to use _Noreturn here: exit() never returns, and GCC knows that
+   exit() is a non-returning function, even on platforms where its declaration
+   in <stdlib.h> does not have the 'noreturn' attribute.  */
+static _Noreturn void
+handler (int sig)
+{
+  _exit (0);
+}
+
+int
+main (void)
+{
+  /* Test behaviour for invalid argument.  */
+  ASSERT (raise (-1) != 0);
+
+  /* Test behaviour for SIGINT.  */
+  ASSERT (signal (SIGINT, handler) != SIG_ERR);
+
+  raise (SIGINT);
+
+  /* We should not get here, because the handler takes away the control.  */
+  exit (1);
+}
diff --git a/src/grep/gnulib-tests/test-rawmemchr.c b/src/grep/gnulib-tests/test-rawmemchr.c
new file mode 100644
index 0000000..f53f875
--- /dev/null
+++ b/src/grep/gnulib-tests/test-rawmemchr.c
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2008-2021 Free Software Foundation, Inc.
+ * Written by Eric Blake and Bruno Haible
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (rawmemchr, void *, (void const *, int));
+
+#include <stdlib.h>
+
+#include "zerosize-ptr.h"
+#include "macros.h"
+
+/* Calculating void * + int is not portable, so this wrapper converts
+   to char * to make the tests easier to write.  */
+#define RAWMEMCHR (char *) rawmemchr
+
+int
+main (void)
+{
+  size_t n = 0x100000;
+  char *input = malloc (n + 1);
+  ASSERT (input);
+
+  input[0] = 'a';
+  input[1] = 'b';
+  memset (input + 2, 'c', 1024);
+  memset (input + 1026, 'd', n - 1028);
+  input[n - 2] = 'e';
+  input[n - 1] = 'a';
+  input[n] = '\0';
+
+  /* Basic behavior tests.  */
+  ASSERT (RAWMEMCHR (input, 'a') == input);
+  ASSERT (RAWMEMCHR (input, 'b') == input + 1);
+  ASSERT (RAWMEMCHR (input, 'c') == input + 2);
+  ASSERT (RAWMEMCHR (input, 'd') == input + 1026);
+
+  ASSERT (RAWMEMCHR (input + 1, 'a') == input + n - 1);
+  ASSERT (RAWMEMCHR (input + 1, 'e') == input + n - 2);
+  ASSERT (RAWMEMCHR (input + 1, 0x789abc00 | 'e') == input + n - 2);
+
+  ASSERT (RAWMEMCHR (input, '\0') == input + n);
+
+  /* Alignment tests.  */
+  {
+    int i, j;
+    for (i = 0; i < 32; i++)
+      {
+        for (j = 0; j < 256; j++)
+          input[i + j] = j;
+        for (j = 0; j < 256; j++)
+          {
+            ASSERT (RAWMEMCHR (input + i, j) == input + i + j);
+          }
+      }
+  }
+
+  /* Ensure that no unaligned oversized reads occur.  */
+  {
+    char *page_boundary = (char *) zerosize_ptr ();
+    size_t i;
+
+    if (!page_boundary)
+      page_boundary = input + 4096;
+    memset (page_boundary - 512, '1', 511);
+    page_boundary[-1] = '2';
+    for (i = 1; i <= 512; i++)
+      ASSERT (RAWMEMCHR (page_boundary - i, (i * 0x01010100) | '2')
+              == page_boundary - 1);
+  }
+
+  free (input);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-read.c b/src/grep/gnulib-tests/test-read.c
new file mode 100644
index 0000000..9d2a9ce
--- /dev/null
+++ b/src/grep/gnulib-tests/test-read.c
@@ -0,0 +1,73 @@
+/* Test the read() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (read, ssize_t, (int, void *, size_t));
+
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  const char *filename = "test-read.tmp";
+  int fd;
+
+  /* Create a file with a simple contents.  */
+  fd = open (filename, O_CREAT | O_WRONLY, 0600);
+  ASSERT (fd >= 0);
+  ASSERT (write (fd, "Hello World", 11) == 11);
+  ASSERT (close (fd) == 0);
+
+  /* Read from the middle of the file.  */
+  fd = open (filename, O_RDONLY);
+  ASSERT (fd >= 0);
+  ASSERT (lseek (fd, 6, SEEK_SET) == 6);
+  {
+    char buf[10];
+    ssize_t ret = read (fd, buf, 10);
+    ASSERT (ret == 5);
+    ASSERT (memcmp (buf, "World", 5) == 0);
+  }
+  ASSERT (close (fd) == 0);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    char byte;
+    errno = 0;
+    ASSERT (read (-1, &byte, 1) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    char byte;
+    close (99);
+    errno = 0;
+    ASSERT (read (99, &byte, 1) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  /* Clean up.  */
+  unlink (filename);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-realloc-gnu.c b/src/grep/gnulib-tests/test-realloc-gnu.c
new file mode 100644
index 0000000..6f98be0
--- /dev/null
+++ b/src/grep/gnulib-tests/test-realloc-gnu.c
@@ -0,0 +1,49 @@
+/* Test of realloc function.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include <errno.h>
+#include <stdint.h>
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  /* Check that realloc (NULL, 0) is not a NULL pointer.  */
+  void *volatile p = realloc (NULL, 0);
+  ASSERT (p != NULL);
+
+  /* Check that realloc (p, n) fails when p is non-null and n exceeds
+     PTRDIFF_MAX.  */
+  if (PTRDIFF_MAX < SIZE_MAX)
+    {
+      size_t one = argc != 12345;
+      p = realloc (p, PTRDIFF_MAX + one);
+      ASSERT (p == NULL);
+      /* Avoid a test failure due to glibc bug
+         <https://sourceware.org/bugzilla/show_bug.cgi?id=27870>.  */
+      if (!getenv ("MALLOC_CHECK_"))
+        ASSERT (errno == ENOMEM);
+    }
+
+  free (p);
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-reallocarray.c b/src/grep/gnulib-tests/test-reallocarray.c
new file mode 100644
index 0000000..ff90962
--- /dev/null
+++ b/src/grep/gnulib-tests/test-reallocarray.c
@@ -0,0 +1,58 @@
+/* Test of reallocarray function.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include <errno.h>
+#include <stdint.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (reallocarray, void *, (void *, size_t, size_t));
+
+#include "macros.h"
+
+int
+main ()
+{
+  /* Check that reallocarray fails when requested to allocate a block
+     of memory larger than PTRDIFF_MAX or SIZE_MAX bytes.  */
+  for (size_t n = 2; n != 0; n <<= 1)
+    {
+      void *volatile p = NULL;
+
+      if (PTRDIFF_MAX / n + 1 <= SIZE_MAX)
+        {
+          p = reallocarray (p, PTRDIFF_MAX / n + 1, n);
+          ASSERT (p == NULL);
+          ASSERT (errno == ENOMEM);
+        }
+
+      p = reallocarray (p, SIZE_MAX / n + 1, n);
+      ASSERT (p == NULL);
+      ASSERT (errno == ENOMEM
+              || errno == EOVERFLOW /* NetBSD */);
+
+      /* Reallocarray should not crash with zero sizes.  */
+      p = reallocarray (p, 0, n);
+      p = reallocarray (p, n, 0);
+      free (p);
+    }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-regex.c b/src/grep/gnulib-tests/test-regex.c
new file mode 100644
index 0000000..ed4ca64
--- /dev/null
+++ b/src/grep/gnulib-tests/test-regex.c
@@ -0,0 +1,488 @@
+/* Test regular expressions
+   Copyright 1996-2001, 2003-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "regex.h"
+
+#include <locale.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wctype.h>
+#if HAVE_DECL_ALARM
+# include <unistd.h>
+# include <signal.h>
+#endif
+
+#include "localcharset.h"
+
+static int exit_status;
+
+static void
+report_error (char const *format, ...)
+{
+  va_list args;
+  va_start (args, format);
+  fprintf (stderr, "test-regex: ");
+  vfprintf (stderr, format, args);
+  fprintf (stderr, "\n");
+  va_end (args);
+  exit_status = 1;
+}
+
+/* Check whether it's really a UTF-8 locale.
+   On mingw, setlocale (LC_ALL, "en_US.UTF-8") succeeds but returns
+   "English_United States.1252", with locale_charset () returning "CP1252".  */
+static int
+really_utf8 (void)
+{
+  return strcmp (locale_charset (), "UTF-8") == 0;
+}
+
+/* Tests supposed to match; copied from glibc posix/bug-regex11.c.  */
+static struct
+{
+  const char *pattern;
+  const char *string;
+  int flags, nmatch;
+  regmatch_t rm[5];
+} const tests[] = {
+  /* Test for newline handling in regex.  */
+  { "[^~]*~", "\nx~y", 0, 2, { { 0, 3 }, { -1, -1 } } },
+  /* Other tests.  */
+  { "a(.*)b", "a b", REG_EXTENDED, 2, { { 0, 3 }, { 1, 2 } } },
+  { ".*|\\([KIO]\\)\\([^|]*\\).*|?[KIO]", "10~.~|P|K0|I10|O16|?KSb", 0, 3,
+    { { 0, 21 }, { 15, 16 }, { 16, 18 } } },
+  { ".*|\\([KIO]\\)\\([^|]*\\).*|?\\1", "10~.~|P|K0|I10|O16|?KSb", 0, 3,
+    { { 0, 21 }, { 8, 9 }, { 9, 10 } } },
+  { "^\\(a*\\)\\1\\{9\\}\\(a\\{0,9\\}\\)\\([0-9]*;.*[^a]\\2\\([0-9]\\)\\)",
+    "a1;;0a1aa2aaa3aaaa4aaaaa5aaaaaa6aaaaaaa7aaaaaaaa8aaaaaaaaa9aa2aa1a0", 0,
+    5, { { 0, 67 }, { 0, 0 }, { 0, 1 }, { 1, 67 }, { 66, 67 } } },
+  /* Test for BRE expression anchoring.  POSIX says just that this may match;
+     in glibc regex it always matched, so avoid changing it.  */
+  { "\\(^\\|foo\\)bar", "bar", 0, 2, { { 0, 3 }, { -1, -1 } } },
+  { "\\(foo\\|^\\)bar", "bar", 0, 2, { { 0, 3 }, { -1, -1 } } },
+  /* In ERE this must be treated as an anchor.  */
+  { "(^|foo)bar", "bar", REG_EXTENDED, 2, { { 0, 3 }, { -1, -1 } } },
+  { "(foo|^)bar", "bar", REG_EXTENDED, 2, { { 0, 3 }, { -1, -1 } } },
+  /* Here ^ cannot be treated as an anchor according to POSIX.  */
+  { "(^|foo)bar", "(^|foo)bar", 0, 2, { { 0, 10 }, { -1, -1 } } },
+  { "(foo|^)bar", "(foo|^)bar", 0, 2, { { 0, 10 }, { -1, -1 } } },
+  /* More tests on backreferences.  */
+  { "()\\1", "x", REG_EXTENDED, 2, { { 0, 0 }, { 0, 0 } } },
+  { "()x\\1", "x", REG_EXTENDED, 2, { { 0, 1 }, { 0, 0 } } },
+  { "()\\1*\\1*", "", REG_EXTENDED, 2, { { 0, 0 }, { 0, 0 } } },
+  { "([0-9]).*\\1(a*)", "7;7a6", REG_EXTENDED, 3, { { 0, 4 }, { 0, 1 }, { 3, 4 } } },
+  { "([0-9]).*\\1(a*)", "7;7a", REG_EXTENDED, 3, { { 0, 4 }, { 0, 1 }, { 3, 4 } } },
+  { "(b)()c\\1", "bcb", REG_EXTENDED, 3, { { 0, 3 }, { 0, 1 }, { 1, 1 } } },
+  { "()(b)c\\2", "bcb", REG_EXTENDED, 3, { { 0, 3 }, { 0, 0 }, { 0, 1 } } },
+  { "a(b)()c\\1", "abcb", REG_EXTENDED, 3, { { 0, 4 }, { 1, 2 }, { 2, 2 } } },
+  { "a()(b)c\\2", "abcb", REG_EXTENDED, 3, { { 0, 4 }, { 1, 1 }, { 1, 2 } } },
+  { "()(b)\\1c\\2", "bcb", REG_EXTENDED, 3, { { 0, 3 }, { 0, 0 }, { 0, 1 } } },
+  { "(b())\\2\\1", "bbbb", REG_EXTENDED, 3, { { 0, 2 }, { 0, 1 }, { 1, 1 } } },
+  { "a()(b)\\1c\\2", "abcb", REG_EXTENDED, 3, { { 0, 4 }, { 1, 1 }, { 1, 2 } } },
+  { "a()d(b)\\1c\\2", "adbcb", REG_EXTENDED, 3, { { 0, 5 }, { 1, 1 }, { 2, 3 } } },
+  { "a(b())\\2\\1", "abbbb", REG_EXTENDED, 3, { { 0, 3 }, { 1, 2 }, { 2, 2 } } },
+  { "(bb())\\2\\1", "bbbb", REG_EXTENDED, 3, { { 0, 4 }, { 0, 2 }, { 2, 2 } } },
+  { "^([^,]*),\\1,\\1$", "a,a,a", REG_EXTENDED, 2, { { 0, 5 }, { 0, 1 } } },
+  { "^([^,]*),\\1,\\1$", "ab,ab,ab", REG_EXTENDED, 2, { { 0, 8 }, { 0, 2 } } },
+  { "^([^,]*),\\1,\\1,\\1$", "abc,abc,abc,abc", REG_EXTENDED, 2,
+    { { 0, 15 }, { 0, 3 } } },
+  { "^(.?)(.?)(.?)(.?)(.?).?\\5\\4\\3\\2\\1$",
+    "level", REG_NOSUB | REG_EXTENDED, 0, { { -1, -1 } } },
+  { "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$|^.?$",
+    "level", REG_NOSUB | REG_EXTENDED, 0, { { -1, -1 } } },
+  { "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$|^.?$",
+    "abcdedcba", REG_EXTENDED, 1, { { 0, 9 } } },
+  { "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$|^.?$",
+    "ababababa", REG_EXTENDED, 1, { { 0, 9 } } },
+  { "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$",
+    "level", REG_NOSUB | REG_EXTENDED, 0, { { -1, -1 } } },
+  { "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$",
+    "ababababa", REG_EXTENDED, 1, { { 0, 9 } } },
+  /* Test for *+ match.  */
+  { "^a*+(.)", "ab", REG_EXTENDED, 2, { { 0, 2 }, { 1, 2 } } },
+  /* Test for ** match.  */
+  { "^(a*)*(.)", "ab", REG_EXTENDED, 3, { { 0, 2 }, { 0, 1 }, { 1, 2 } } },
+};
+
+static void
+bug_regex11 (void)
+{
+  regex_t re;
+  regmatch_t rm[5];
+  size_t i;
+  int n;
+
+  for (i = 0; i < sizeof (tests) / sizeof (tests[0]); ++i)
+    {
+      n = regcomp (&re, tests[i].pattern, tests[i].flags);
+      if (n != 0)
+	{
+	  char buf[500];
+	  regerror (n, &re, buf, sizeof (buf));
+	  report_error ("%s: regcomp %zd failed: %s", tests[i].pattern, i, buf);
+	  continue;
+	}
+
+      if (regexec (&re, tests[i].string, tests[i].nmatch, rm, 0))
+	{
+	  report_error ("%s: regexec %zd failed", tests[i].pattern, i);
+	  regfree (&re);
+	  continue;
+	}
+
+      for (n = 0; n < tests[i].nmatch; ++n)
+	if (rm[n].rm_so != tests[i].rm[n].rm_so
+              || rm[n].rm_eo != tests[i].rm[n].rm_eo)
+	  {
+	    if (tests[i].rm[n].rm_so == -1 && tests[i].rm[n].rm_eo == -1)
+	      break;
+	    report_error ("%s: regexec %zd match failure rm[%d] %d..%d",
+                          tests[i].pattern, i, n,
+                          (int) rm[n].rm_so, (int) rm[n].rm_eo);
+	    break;
+	  }
+
+      regfree (&re);
+    }
+}
+
+int
+main (void)
+{
+  static struct re_pattern_buffer regex;
+  unsigned char folded_chars[UCHAR_MAX + 1];
+  int i;
+  const char *s;
+  struct re_registers regs;
+
+#if HAVE_DECL_ALARM
+  /* In case a bug causes glibc to go into an infinite loop.
+     The tests should take less than 10 s on a reasonably modern CPU.  */
+  int alarm_value = 1000;
+  signal (SIGALRM, SIG_DFL);
+  alarm (alarm_value);
+#endif
+
+  bug_regex11 ();
+
+  if (setlocale (LC_ALL, "en_US.UTF-8"))
+    {
+      {
+        /* https://sourceware.org/ml/libc-hacker/2006-09/msg00008.html
+           This test needs valgrind to catch the bug on Debian
+           GNU/Linux 3.1 x86, but it might catch the bug better
+           on other platforms and it shouldn't hurt to try the
+           test here.  */
+        static char const pat[] = "insert into";
+        static char const data[] =
+          "\xFF\0\x12\xA2\xAA\xC4\xB1,K\x12\xC4\xB1*\xACK";
+        re_set_syntax (RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE
+                       | RE_ICASE);
+        memset (&regex, 0, sizeof regex);
+        s = re_compile_pattern (pat, sizeof pat - 1, &regex);
+        if (s)
+          report_error ("%s: %s", pat, s);
+        else
+          {
+            memset (&regs, 0, sizeof regs);
+            i = re_search (&regex, data, sizeof data - 1,
+                           0, sizeof data - 1, &regs);
+            if (i != -1)
+              report_error ("re_search '%s' on '%s' returned %d",
+                            pat, data, i);
+            regfree (&regex);
+            free (regs.start);
+            free (regs.end);
+          }
+      }
+
+      if (really_utf8 ())
+        {
+          /* This test is from glibc bug 15078.
+             The test case is from Andreas Schwab in
+             <https://sourceware.org/ml/libc-alpha/2013-01/msg00967.html>.
+          */
+          static char const pat[] = "[^x]x";
+          static char const data[] =
+            /* <U1000><U103B><U103D><U1014><U103A><U102F><U1015><U103A> */
+            "\xe1\x80\x80"
+            "\xe1\x80\xbb"
+            "\xe1\x80\xbd"
+            "\xe1\x80\x94"
+            "\xe1\x80\xba"
+            "\xe1\x80\xaf"
+            "\xe1\x80\x95"
+            "\xe1\x80\xba"
+            "x";
+          re_set_syntax (0);
+          memset (&regex, 0, sizeof regex);
+          s = re_compile_pattern (pat, sizeof pat - 1, &regex);
+          if (s)
+            report_error ("%s: %s", pat, s);
+          else
+            {
+              memset (&regs, 0, sizeof regs);
+              i = re_search (&regex, data, sizeof data - 1,
+                             0, sizeof data - 1, 0);
+              if (i != 0 && i != 21)
+                report_error ("re_search '%s' on '%s' returned %d",
+                              pat, data, i);
+              regfree (&regex);
+              free (regs.start);
+              free (regs.end);
+            }
+        }
+
+      if (! setlocale (LC_ALL, "C"))
+        {
+          report_error ("setlocale \"C\" failed");
+          return exit_status;
+        }
+    }
+
+  if (setlocale (LC_ALL, "tr_TR.UTF-8"))
+    {
+      if (really_utf8 () && towupper (L'i') == 0x0130 /* U+0130; see below.  */)
+        {
+          re_set_syntax (RE_SYNTAX_GREP | RE_ICASE);
+          memset (&regex, 0, sizeof regex);
+          static char const pat[] = "i";
+          s = re_compile_pattern (pat, sizeof pat - 1, &regex);
+          if (s)
+            report_error ("%s: %s", pat, s);
+          else
+            {
+              /* UTF-8 encoding of U+0130 LATIN CAPITAL LETTER I WITH DOT ABOVE.
+                 In Turkish, this is the upper-case equivalent of ASCII "i".
+                 Older versions of Gnulib failed to match "i" to U+0130 when
+                 ignoring case in Turkish <https://bugs.gnu.org/43577>.  */
+              static char const data[] = "\xc4\xb0";
+
+              memset (&regs, 0, sizeof regs);
+              i = re_search (&regex, data, sizeof data - 1, 0, sizeof data - 1,
+                             &regs);
+              if (i != 0)
+                report_error ("re_search '%s' on '%s' returned %d",
+                              pat, data, i);
+              regfree (&regex);
+              free (regs.start);
+              free (regs.end);
+            }
+        }
+
+      if (! setlocale (LC_ALL, "C"))
+        {
+          report_error ("setlocale \"C\" failed");
+          return exit_status;
+        }
+    }
+
+  /* This test is from glibc bug 3957, reported by Andrew Mackey.  */
+  re_set_syntax (RE_SYNTAX_EGREP | RE_HAT_LISTS_NOT_NEWLINE);
+  memset (&regex, 0, sizeof regex);
+  static char const pat_3957[] = "a[^x]b";
+  s = re_compile_pattern (pat_3957, sizeof pat_3957 - 1, &regex);
+  if (s)
+    report_error ("%s: %s", pat_3957, s);
+  else
+    {
+      /* This should fail, but succeeds for glibc-2.5.  */
+      memset (&regs, 0, sizeof regs);
+      static char const data[] = "a\nb";
+      i = re_search (&regex, data, sizeof data - 1, 0, sizeof data - 1, &regs);
+      if (i != -1)
+        report_error ("re_search '%s' on '%s' returned %d",
+                      pat_3957, data, i);
+      regfree (&regex);
+      free (regs.start);
+      free (regs.end);
+    }
+
+  /* This regular expression is from Spencer ere test number 75
+     in grep-2.3.  */
+  re_set_syntax (RE_SYNTAX_POSIX_EGREP);
+  memset (&regex, 0, sizeof regex);
+  for (i = 0; i <= UCHAR_MAX; i++)
+    folded_chars[i] = i;
+  regex.translate = folded_chars;
+  static char const pat75[] = "a[[:@:>@:]]b\n";
+  s = re_compile_pattern (pat75, sizeof pat75 - 1, &regex);
+  /* This should fail with _Invalid character class name_ error.  */
+  if (!s)
+    {
+      report_error ("re_compile_pattern: failed to reject '%s'", pat75);
+      regfree (&regex);
+    }
+
+  /* Ensure that [b-a] is diagnosed as invalid, when
+     using RE_NO_EMPTY_RANGES. */
+  re_set_syntax (RE_SYNTAX_POSIX_EGREP | RE_NO_EMPTY_RANGES);
+  memset (&regex, 0, sizeof regex);
+  static char const pat_b_a[] = "a[b-a]";
+  s = re_compile_pattern (pat_b_a, sizeof pat_b_a - 1, &regex);
+  if (s == 0)
+    {
+      report_error ("re_compile_pattern: failed to reject '%s'", pat_b_a);
+      regfree (&regex);
+    }
+
+  /* This should succeed, but does not for glibc-2.1.3.  */
+  memset (&regex, 0, sizeof regex);
+  static char const pat_213[] = "{1";
+  s = re_compile_pattern (pat_213, sizeof pat_213 - 1, &regex);
+  if (s)
+    report_error ("%s: %s", pat_213, s);
+  else
+    regfree (&regex);
+
+  /* The following example is derived from a problem report
+     against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>.  */
+  memset (&regex, 0, sizeof regex);
+  static char const pat_stolfi[] = "[an\371]*n";
+  s = re_compile_pattern (pat_stolfi, sizeof pat_stolfi - 1, &regex);
+  if (s)
+    report_error ("%s: %s", pat_stolfi, s);
+  /* This should match, but does not for glibc-2.2.1.  */
+  else
+    {
+      memset (&regs, 0, sizeof regs);
+      static char const data[] = "an";
+      i = re_match (&regex, data, sizeof data - 1, 0, &regs);
+      if (i != 2)
+        report_error ("re_match '%s' on '%s' at 2 returned %d",
+                      pat_stolfi, data, i);
+      regfree (&regex);
+      free (regs.start);
+      free (regs.end);
+    }
+
+  memset (&regex, 0, sizeof regex);
+  static char const pat_x[] = "x";
+  s = re_compile_pattern (pat_x, sizeof pat_x - 1, &regex);
+  if (s)
+    report_error ("%s: %s", pat_x, s);
+  /* glibc-2.2.93 does not work with a negative RANGE argument.  */
+  else
+    {
+      memset (&regs, 0, sizeof regs);
+      static char const data[] = "wxy";
+      i = re_search (&regex, data, sizeof data - 1, 2, -2, &regs);
+      if (i != 1)
+        report_error ("re_search '%s' on '%s' returned %d", pat_x, data, i);
+      regfree (&regex);
+      free (regs.start);
+      free (regs.end);
+    }
+
+  /* The version of regex.c in older versions of gnulib
+     ignored RE_ICASE.  Detect that problem too.  */
+  re_set_syntax (RE_SYNTAX_EMACS | RE_ICASE);
+  memset (&regex, 0, sizeof regex);
+  s = re_compile_pattern (pat_x, 1, &regex);
+  if (s)
+    report_error ("%s: %s", pat_x, s);
+  else
+    {
+      memset (&regs, 0, sizeof regs);
+      static char const data[] = "WXY";
+      i = re_search (&regex, data, sizeof data - 1, 0, 3, &regs);
+      if (i < 0)
+        report_error ("re_search '%s' on '%s' returned %d", pat_x, data, i);
+      regfree (&regex);
+      free (regs.start);
+      free (regs.end);
+    }
+
+  /* glibc bug 11053.  */
+  re_set_syntax (RE_SYNTAX_POSIX_BASIC);
+  memset (&regex, 0, sizeof regex);
+  static char const pat_sub2[] = "\\(a*\\)*a*\\1";
+  s = re_compile_pattern (pat_sub2, sizeof pat_sub2 - 1, &regex);
+  if (s)
+    report_error ("%s: %s", pat_sub2, s);
+  else
+    {
+      memset (&regs, 0, sizeof regs);
+      static char const data[] = "a";
+      int datalen = sizeof data - 1;
+      i = re_search (&regex, data, datalen, 0, datalen, &regs);
+      if (i != 0)
+        report_error ("re_search '%s' on '%s' returned %d", pat_sub2, data, i);
+      else if (regs.num_regs < 2)
+        report_error ("re_search '%s' on '%s' returned only %d registers",
+                      pat_sub2, data, (int) regs.num_regs);
+      else if (! (regs.start[0] == 0 && regs.end[0] == 1))
+        report_error ("re_search '%s' on '%s' returned wrong match [%d,%d)",
+                      pat_sub2, data, (int) regs.start[0], (int) regs.end[0]);
+      else if (! (regs.start[1] == 0 && regs.end[1] == 0))
+        report_error ("re_search '%s' on '%s' returned wrong submatch [%d,%d)",
+                      pat_sub2, data, (int) regs.start[1], (int) regs.end[1]);
+      regfree (&regex);
+      free (regs.start);
+      free (regs.end);
+    }
+
+  /* Catch a bug reported by Vin Shelton in
+     https://lists.gnu.org/r/bug-coreutils/2007-06/msg00089.html
+     */
+  re_set_syntax (RE_SYNTAX_POSIX_BASIC
+                 & ~RE_CONTEXT_INVALID_DUP
+                 & ~RE_NO_EMPTY_RANGES);
+  static char const pat_shelton[] = "[[:alnum:]_-]\\\\+$";
+  s = re_compile_pattern (pat_shelton, sizeof pat_shelton - 1, &regex);
+  if (s)
+    report_error ("%s: %s", pat_shelton, s);
+  else
+    regfree (&regex);
+
+  /* REG_STARTEND was added to glibc on 2004-01-15.
+     Reject older versions.  */
+  if (REG_STARTEND == 0)
+    report_error ("REG_STARTEND is zero");
+
+  /* Matching with the compiled form of this regexp would provoke
+     an assertion failure prior to glibc-2.28:
+       regexec.c:1375: pop_fail_stack: Assertion 'num >= 0' failed
+     With glibc-2.28, compilation fails and reports the invalid
+     back reference.  */
+  re_set_syntax (RE_SYNTAX_POSIX_EGREP);
+  memset (&regex, 0, sizeof regex);
+  static char const pat_badback[] = "0|()0|\\1|0";
+  s = re_compile_pattern (pat_badback, sizeof pat_badback, &regex);
+  if (!s && re_search (&regex, "x", 1, 0, 1, &regs) != -1)
+    s = "mishandled invalid back reference";
+  if (s && strcmp (s, "Invalid back reference") != 0)
+    report_error ("%s: %s", pat_badback, s);
+
+#if 0
+  /* It would be nice to reject hosts whose regoff_t values are too
+     narrow (including glibc on hosts with 64-bit ptrdiff_t and
+     32-bit int), but we should wait until glibc implements this
+     feature.  Otherwise, support for equivalence classes and
+     multibyte collation symbols would always be broken except
+     when compiling --without-included-regex.   */
+  if (sizeof (regoff_t) < sizeof (ptrdiff_t)
+      || sizeof (regoff_t) < sizeof (ssize_t))
+    report_error ("regoff_t values are too narrow");
+#endif
+
+  return exit_status;
+}
diff --git a/src/grep/gnulib-tests/test-sched.c b/src/grep/gnulib-tests/test-sched.c
new file mode 100644
index 0000000..f3c4195
--- /dev/null
+++ b/src/grep/gnulib-tests/test-sched.c
@@ -0,0 +1,41 @@
+/* Test of <sched.h> substitute.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include <sched.h>
+
+/* Check that 'struct sched_param' is defined.  */
+static struct sched_param a;
+
+/* Check that the SCHED_* macros are defined and compile-time constants.  */
+int b[] = { SCHED_FIFO, SCHED_RR, SCHED_OTHER };
+
+/* Check that the types are all defined.  */
+pid_t t1;
+
+static int f1;
+
+int
+main ()
+{
+  /* Check fields of 'struct sched_param'.  */
+  f1 = a.sched_priority;
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-select-fd.c b/src/grep/gnulib-tests/test-select-fd.c
new file mode 100644
index 0000000..229e821
--- /dev/null
+++ b/src/grep/gnulib-tests/test-select-fd.c
@@ -0,0 +1,72 @@
+/* Test of select() substitute, reading or writing from a given file descriptor.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/select.h>
+
+int
+main (int argc, char *argv[])
+{
+  if (argc == 4)
+    {
+      char mode = argv[1][0];
+
+      if (mode == 'r' || mode == 'w')
+        {
+          int fd = atoi (argv[2]);
+
+          if (fd >= 0)
+            {
+              const char *result_file_name = argv[3];
+              FILE *result_file = fopen (result_file_name, "wb");
+
+              if (result_file != NULL)
+                {
+                  fd_set fds;
+                  struct timeval timeout;
+                  int ret;
+
+                  FD_ZERO (&fds);
+                  FD_SET (fd, &fds);
+                  timeout.tv_sec = 0;
+                  timeout.tv_usec = 10000;
+                  ret = (mode == 'r'
+                         ? select (fd + 1, &fds, NULL, NULL, &timeout)
+                         : select (fd + 1, NULL, &fds, NULL, &timeout));
+                  if (ret < 0)
+                    {
+                      perror ("select failed");
+                      exit (1);
+                    }
+                  if ((ret == 0) != ! FD_ISSET (fd, &fds))
+                    {
+                      fprintf (stderr, "incorrect return value\n");
+                      exit (1);
+                    }
+                  fprintf (result_file, "%d\n", ret);
+                  exit (0);
+                }
+            }
+        }
+    }
+  fprintf (stderr, "Usage: test-select-fd mode fd result-file-name\n");
+  exit (1);
+}
diff --git a/src/grep/gnulib-tests/test-select-in.sh b/src/grep/gnulib-tests/test-select-in.sh
new file mode 100755
index 0000000..68176d3
--- /dev/null
+++ b/src/grep/gnulib-tests/test-select-in.sh
@@ -0,0 +1,38 @@
+#!/bin/sh
+# Test select() on file descriptors opened for reading.
+
+# This test is known to fail on Solaris 2.6 and older, due to its handling
+# of /dev/null.
+
+tmpfiles=""
+trap 'rm -fr $tmpfiles' 1 2 3 15
+
+tmpfiles="$tmpfiles t-select-in.tmp"
+
+# Regular files.
+
+rm -f t-select-in.tmp
+${CHECKER} ./test-select-fd${EXEEXT} r 0 t-select-in.tmp < ./test-select-fd${EXEEXT}
+test `cat t-select-in.tmp` = "1" || exit 1
+
+# Pipes.
+
+rm -f t-select-in.tmp
+{ sleep 1; echo abc; } | \
+  { ${CHECKER} ./test-select-fd${EXEEXT} r 0 t-select-in.tmp; cat > /dev/null; }
+test `cat t-select-in.tmp` = "0" || exit 1
+
+rm -f t-select-in.tmp
+echo abc | { sleep 1; ${CHECKER} ./test-select-fd${EXEEXT} r 0 t-select-in.tmp; }
+test `cat t-select-in.tmp` = "1" || exit 1
+
+# Special files.
+# This part of the test is known to fail on Solaris 2.6 and older.
+
+rm -f t-select-in.tmp
+${CHECKER} ./test-select-fd${EXEEXT} r 0 t-select-in.tmp < /dev/null
+test `cat t-select-in.tmp` = "1" || exit 1
+
+rm -fr $tmpfiles
+
+exit 0
diff --git a/src/grep/gnulib-tests/test-select-out.sh b/src/grep/gnulib-tests/test-select-out.sh
new file mode 100755
index 0000000..dbeace5
--- /dev/null
+++ b/src/grep/gnulib-tests/test-select-out.sh
@@ -0,0 +1,35 @@
+#!/bin/sh
+# Test select() on file descriptors opened for writing.
+
+tmpfiles=""
+trap 'rm -fr $tmpfiles' 1 2 3 15
+
+tmpfiles="$tmpfiles t-select-out.out t-select-out.tmp"
+
+# Regular files.
+
+rm -f t-select-out.tmp
+${CHECKER} ./test-select-fd${EXEEXT} w 1 t-select-out.tmp > t-select-out.out
+test `cat t-select-out.tmp` = "1" || exit 1
+
+# Pipes.
+
+if false; then # This test fails on some platforms.
+  rm -f t-select-out.tmp
+  ( { echo abc; ${CHECKER} ./test-select-fd${EXEEXT} w 1 t-select-out.tmp; } | { sleep 1; cat; } ) > /dev/null
+  test `cat t-select-out.tmp` = "0" || exit 1
+fi
+
+rm -f t-select-out.tmp
+( { sleep 1; echo abc; ${CHECKER} ./test-select-fd${EXEEXT} w 1 t-select-out.tmp; } | cat) > /dev/null
+test `cat t-select-out.tmp` = "1" || exit 1
+
+# Special files.
+
+rm -f t-select-out.tmp
+${CHECKER} ./test-select-fd${EXEEXT} w 1 t-select-out.tmp > /dev/null
+test `cat t-select-out.tmp` = "1" || exit 1
+
+rm -fr $tmpfiles
+
+exit 0
diff --git a/src/grep/gnulib-tests/test-select-stdin.c b/src/grep/gnulib-tests/test-select-stdin.c
new file mode 100644
index 0000000..26ca8a8
--- /dev/null
+++ b/src/grep/gnulib-tests/test-select-stdin.c
@@ -0,0 +1,83 @@
+/* Test of select() substitute, reading from stdin.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/select.h>
+#include <sys/time.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  printf ("Applying select() from standard input. Press Ctrl-C to abort.\n");
+  for (;;)
+    {
+      struct timeval before;
+      struct timeval after;
+      unsigned long spent_usec;
+      fd_set readfds;
+      struct timeval timeout;
+      int ret;
+
+      gettimeofday (&before, NULL);
+
+      FD_ZERO (&readfds);
+      FD_SET (0, &readfds);
+      timeout.tv_sec = 0;
+      timeout.tv_usec = 500000;
+      ret = select (1, &readfds, NULL, NULL, &timeout);
+
+      gettimeofday (&after, NULL);
+      spent_usec = (after.tv_sec - before.tv_sec) * 1000000
+                   + after.tv_usec - before.tv_usec;
+
+      if (ret < 0)
+        {
+          perror ("select failed");
+          exit (1);
+        }
+      if ((ret == 0) != ! FD_ISSET (0, &readfds))
+        {
+          fprintf (stderr, "incorrect return value\n");
+          exit (1);
+        }
+      if (ret == 0)
+        {
+          if (spent_usec < 250000)
+            {
+              fprintf (stderr, "returned too early\n");
+              exit (1);
+            }
+          /* Timeout */
+          printf (".");
+          ASSERT (fflush (stdout) == 0);
+        }
+      else
+        {
+          char c;
+
+          printf ("Input available! Trying to read 1 byte...\n");
+          ASSERT (read (0, &c, 1) == 1);
+        }
+    }
+}
diff --git a/src/grep/gnulib-tests/test-select.c b/src/grep/gnulib-tests/test-select.c
new file mode 100644
index 0000000..a4ff8d1
--- /dev/null
+++ b/src/grep/gnulib-tests/test-select.c
@@ -0,0 +1,34 @@
+/* Test of select() substitute.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paolo Bonzini, 2008.  */
+
+#include <config.h>
+
+#include <sys/select.h>
+
+#include "signature.h"
+
+SIGNATURE_CHECK (select, int, (int, fd_set *, fd_set *, fd_set *,
+                               struct timeval *));
+
+#include "test-select.h"
+
+int
+main (void)
+{
+  return test_function (select);
+}
diff --git a/src/grep/gnulib-tests/test-select.h b/src/grep/gnulib-tests/test-select.h
new file mode 100644
index 0000000..6348a49
--- /dev/null
+++ b/src/grep/gnulib-tests/test-select.h
@@ -0,0 +1,466 @@
+/* Test of select() substitute.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paolo Bonzini, 2008.  */
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+
+#include "macros.h"
+
+#if defined _WIN32 && ! defined __CYGWIN__
+# define WINDOWS_NATIVE
+#endif
+
+#ifdef HAVE_SYS_WAIT_H
+# include <sys/wait.h>
+#endif
+
+#define TEST_PORT       12345
+
+
+typedef int (*select_fn) (int, fd_set *, fd_set *, fd_set *, struct timeval *);
+
+
+/* Minimal testing infrastructure.  */
+
+static int failures;
+
+static void
+failed (const char *reason)
+{
+  if (++failures > 1)
+    printf ("  ");
+  printf ("failed (%s)\n", reason);
+}
+
+static int
+test (void (*fn) (select_fn), select_fn my_select, const char *msg)
+{
+  failures = 0;
+  printf ("%s... ", msg);
+  fflush (stdout);
+  fn (my_select);
+
+  if (!failures)
+    printf ("passed\n");
+
+  return failures;
+}
+
+
+/* Funny socket code.  */
+
+static int
+open_server_socket (void)
+{
+  int s, x;
+  struct sockaddr_in ia;
+
+  s = socket (AF_INET, SOCK_STREAM, 0);
+
+  x = 1;
+  setsockopt (s, SOL_SOCKET, SO_REUSEPORT, &x, sizeof (x));
+
+  memset (&ia, 0, sizeof (ia));
+  ia.sin_family = AF_INET;
+  inet_pton (AF_INET, "127.0.0.1", &ia.sin_addr);
+  ia.sin_port = htons (TEST_PORT);
+  if (bind (s, (struct sockaddr *) &ia, sizeof (ia)) < 0)
+    {
+      perror ("bind");
+      exit (77);
+    }
+
+  if (listen (s, 1) < 0)
+    {
+      perror ("listen");
+      exit (77);
+    }
+
+  return s;
+}
+
+static int
+connect_to_socket (bool blocking)
+{
+  int s;
+  struct sockaddr_in ia;
+
+  s = socket (AF_INET, SOCK_STREAM, 0);
+
+  memset (&ia, 0, sizeof (ia));
+  ia.sin_family = AF_INET;
+  inet_pton (AF_INET, "127.0.0.1", &ia.sin_addr);
+  ia.sin_port = htons (TEST_PORT);
+
+  if (!blocking)
+    {
+#ifdef WINDOWS_NATIVE
+      unsigned long iMode = 1;
+      ioctl (s, FIONBIO, (char *) &iMode);
+
+#elif defined F_GETFL
+      int oldflags = fcntl (s, F_GETFL, NULL);
+
+      if (!(oldflags & O_NONBLOCK))
+        fcntl (s, F_SETFL, oldflags | O_NONBLOCK);
+#endif
+    }
+
+  if (connect (s, (struct sockaddr *) &ia, sizeof (ia)) < 0
+      && (blocking || errno != EINPROGRESS))
+    {
+      perror ("connect");
+      exit (77);
+    }
+
+  return s;
+}
+
+
+/* A slightly more convenient interface to select(2).
+   Waits until a specific event occurs on a file descriptor FD.
+   EV is a bit mask of events to look for:
+     SEL_IN - input can be polled without blocking,
+     SEL_OUT - output can be provided without blocking,
+     SEL_EXC - an exception occurred,
+   A maximum wait time is specified by TIMEOUT.
+   *TIMEOUT = { 0, 0 } means to return immediately,
+   TIMEOUT = NULL means to wait indefinitely.  */
+
+enum { SEL_IN = 1, SEL_OUT = 2, SEL_EXC = 4 };
+
+static int
+do_select (int fd, int ev, struct timeval *timeout, select_fn my_select)
+{
+  fd_set rfds, wfds, xfds;
+  int r, rev;
+
+  FD_ZERO (&rfds);
+  FD_ZERO (&wfds);
+  FD_ZERO (&xfds);
+  if (ev & SEL_IN)
+    FD_SET (fd, &rfds);
+  if (ev & SEL_OUT)
+    FD_SET (fd, &wfds);
+  if (ev & SEL_EXC)
+    FD_SET (fd, &xfds);
+  r = my_select (fd + 1, &rfds, &wfds, &xfds, timeout);
+  if (r < 0)
+    return r;
+
+  rev = 0;
+  if (FD_ISSET (fd, &rfds))
+    rev |= SEL_IN;
+  if (FD_ISSET (fd, &wfds))
+    rev |= SEL_OUT;
+  if (FD_ISSET (fd, &xfds))
+    rev |= SEL_EXC;
+  if (rev && r == 0)
+    failed ("select returned 0");
+  if (rev & ~ev)
+    failed ("select returned unrequested events");
+
+  return rev;
+}
+
+static int
+do_select_nowait (int fd, int ev, select_fn my_select)
+{
+  struct timeval tv0;
+  tv0.tv_sec = 0;
+  tv0.tv_usec = 0;
+  return do_select (fd, ev, &tv0, my_select);
+}
+
+static int
+do_select_wait (int fd, int ev, select_fn my_select)
+{
+  return do_select (fd, ev, NULL, my_select);
+}
+
+
+/* Test select(2) for TTYs.  */
+
+#ifdef INTERACTIVE
+static void
+test_tty (select_fn my_select)
+{
+  if (do_select_nowait (0, SEL_IN, my_select) != 0)
+    failed ("can read");
+  if (do_select_nowait (0, SEL_OUT, my_select) == 0)
+    failed ("cannot write");
+
+  if (do_select_wait (0, SEL_IN, my_select) == 0)
+    failed ("return with infinite timeout");
+
+  getchar ();
+  if (do_select_nowait (0, SEL_IN, my_select) != 0)
+    failed ("can read after getc");
+}
+#endif
+
+
+static int
+do_select_bad_nfd_nowait (int nfd, select_fn my_select)
+{
+  struct timeval tv0;
+  tv0.tv_sec = 0;
+  tv0.tv_usec = 0;
+  errno = 0;
+  return my_select (nfd, NULL, NULL, NULL, &tv0);
+}
+
+static void
+test_bad_nfd (select_fn my_select)
+{
+  if (do_select_bad_nfd_nowait (-1, my_select) != -1 || errno != EINVAL)
+    failed ("invalid errno after negative nfds");
+  /* Can't test FD_SETSIZE + 1 for EINVAL, since some systems allow
+     dynamically larger set size by redefining FD_SETSIZE anywhere up
+     to the actual maximum fd.  */
+#if 0
+  if (do_select_bad_nfd_nowait (FD_SETSIZE + 1, my_select) != -1
+      || errno != EINVAL)
+    failed ("invalid errno after bogus nfds");
+#endif
+}
+
+/* Test select(2) on invalid file descriptors.  */
+
+static int
+do_select_bad_fd (int fd, int ev, struct timeval *timeout, select_fn my_select)
+{
+  fd_set rfds, wfds, xfds;
+
+  FD_ZERO (&rfds);
+  FD_ZERO (&wfds);
+  FD_ZERO (&xfds);
+  if (ev & SEL_IN)
+    FD_SET (fd, &rfds);
+  if (ev & SEL_OUT)
+    FD_SET (fd, &wfds);
+  if (ev & SEL_EXC)
+    FD_SET (fd, &xfds);
+  errno = 0;
+  return my_select (fd + 1, &rfds, &wfds, &xfds, timeout);
+  /* In this case, when fd is invalid, on some platforms, the bit for fd
+     is left alone in the fd_set, whereas on other platforms it is cleared.
+     So, don't check the bit for fd here.  */
+}
+
+static int
+do_select_bad_fd_nowait (int fd, int ev, select_fn my_select)
+{
+  struct timeval tv0;
+  tv0.tv_sec = 0;
+  tv0.tv_usec = 0;
+  return do_select_bad_fd (fd, ev, &tv0, my_select);
+}
+
+static void
+test_bad_fd (select_fn my_select)
+{
+  /* This tests fails on OSF/1 and native Windows, even with fd = 16.  */
+#if !(defined __osf__ || defined WINDOWS_NATIVE)
+  int fd;
+
+  /* On Linux, Mac OS X, *BSD, values of fd like 99 or 399 are discarded
+     by the kernel early and therefore do *not* lead to EBADF, as required
+     by POSIX.  */
+# if defined __linux__ || (defined __APPLE__ && defined __MACH__) || (defined __FreeBSD__ || defined __DragonFly__) || defined __OpenBSD__ || defined __NetBSD__
+  fd = 14;
+# else
+  fd = 99;
+# endif
+  /* Even on the best POSIX compliant platforms, values of fd >= FD_SETSIZE
+     require an nfds argument that is > FD_SETSIZE and thus may lead to EINVAL,
+     not EBADF.  */
+  if (fd >= FD_SETSIZE)
+    fd = FD_SETSIZE - 1;
+  close (fd);
+
+  if (do_select_bad_fd_nowait (fd, SEL_IN, my_select) == 0 || errno != EBADF)
+    failed ("invalid fd among rfds");
+  if (do_select_bad_fd_nowait (fd, SEL_OUT, my_select) == 0 || errno != EBADF)
+    failed ("invalid fd among wfds");
+  if (do_select_bad_fd_nowait (fd, SEL_EXC, my_select) == 0 || errno != EBADF)
+    failed ("invalid fd among xfds");
+#endif
+}
+
+
+/* Test select(2) for unconnected nonblocking sockets.  */
+
+static void
+test_connect_first (select_fn my_select)
+{
+  int s = open_server_socket ();
+  struct sockaddr_in ia;
+  socklen_t addrlen;
+
+  int c1, c2;
+
+  if (do_select_nowait (s, SEL_IN | SEL_EXC, my_select) != 0)
+    failed ("can read, socket not connected");
+
+  c1 = connect_to_socket (false);
+
+  if (do_select_wait (s, SEL_IN | SEL_EXC, my_select) != SEL_IN)
+    failed ("expecting readability on passive socket");
+  if (do_select_nowait (s, SEL_IN | SEL_EXC, my_select) != SEL_IN)
+    failed ("expecting readability on passive socket");
+
+  addrlen = sizeof (ia);
+  c2 = accept (s, (struct sockaddr *) &ia, &addrlen);
+  ASSERT (close (s) == 0);
+  ASSERT (close (c1) == 0);
+  ASSERT (close (c2) == 0);
+}
+
+
+/* Test select(2) for unconnected blocking sockets.  */
+
+static void
+test_accept_first (select_fn my_select)
+{
+#ifndef WINDOWS_NATIVE
+  int s = open_server_socket ();
+  struct sockaddr_in ia;
+  socklen_t addrlen;
+  char buf[3];
+  int c, pid;
+
+  pid = fork ();
+  if (pid < 0)
+    return;
+
+  if (pid == 0)
+    {
+      addrlen = sizeof (ia);
+      c = accept (s, (struct sockaddr *) &ia, &addrlen);
+      ASSERT (close (s) == 0);
+      ASSERT (write (c, "foo", 3) == 3);
+      ASSERT (read (c, buf, 3) == 3);
+      shutdown (c, SHUT_RD);
+      ASSERT (close (c) == 0);
+      exit (0);
+    }
+  else
+    {
+      ASSERT (close (s) == 0);
+      c = connect_to_socket (true);
+      if (do_select_nowait (c, SEL_OUT, my_select) != SEL_OUT)
+        failed ("cannot write after blocking connect");
+      ASSERT (write (c, "foo", 3) == 3);
+      wait (&pid);
+      if (do_select_wait (c, SEL_IN, my_select) != SEL_IN)
+        failed ("cannot read data left in the socket by closed process");
+      ASSERT (read (c, buf, 3) == 3);
+      ASSERT (write (c, "foo", 3) == 3);
+      (void) close (c); /* may fail with errno = ECONNRESET */
+    }
+#endif
+}
+
+
+/* Common code for pipes and connected sockets.  */
+
+static void
+test_pair (int rd, int wd, select_fn my_select)
+{
+  char buf[3];
+  if (do_select_wait (wd, SEL_IN | SEL_OUT | SEL_EXC, my_select) != SEL_OUT)
+    failed ("expecting writability before writing");
+  if (do_select_nowait (wd, SEL_IN | SEL_OUT | SEL_EXC, my_select) != SEL_OUT)
+    failed ("expecting writability before writing");
+
+  ASSERT (write (wd, "foo", 3) == 3);
+  if (do_select_wait (rd, SEL_IN, my_select) != SEL_IN)
+    failed ("expecting readability after writing");
+  if (do_select_nowait (rd, SEL_IN, my_select) != SEL_IN)
+    failed ("expecting readability after writing");
+
+  ASSERT (read (rd, buf, 3) == 3);
+}
+
+
+/* Test select(2) on connected sockets.  */
+
+static void
+test_socket_pair (select_fn my_select)
+{
+  struct sockaddr_in ia;
+
+  socklen_t addrlen = sizeof (ia);
+  int s = open_server_socket ();
+  int c1 = connect_to_socket (false);
+  int c2 = accept (s, (struct sockaddr *) &ia, &addrlen);
+
+  ASSERT (close (s) == 0);
+
+  test_pair (c1, c2, my_select);
+  ASSERT (close (c1) == 0);
+  ASSERT (write (c2, "foo", 3) == 3);
+  (void) close (c2); /* may fail with errno = ECONNRESET */
+}
+
+
+/* Test select(2) on pipes.  */
+
+static void
+test_pipe (select_fn my_select)
+{
+  int fd[2];
+
+  ASSERT (pipe (fd) == 0);
+  test_pair (fd[0], fd[1], my_select);
+  ASSERT (close (fd[0]) == 0);
+  ASSERT (close (fd[1]) == 0);
+}
+
+
+/* Do them all.  */
+
+static int
+test_function (select_fn my_select)
+{
+  int result = 0;
+
+#ifdef INTERACTIVE
+  printf ("Please press Enter\n");
+  test (test_tty, "TTY", my_select);
+#endif
+
+  result += test (test_bad_nfd, my_select, "Invalid nfd test");
+  result += test (test_bad_fd, my_select, "Invalid fd test");
+  result += test (test_connect_first, my_select, "Unconnected socket test");
+  result += test (test_socket_pair, my_select, "Connected sockets test");
+  result += test (test_accept_first, my_select, "General socket test with fork");
+  result += test (test_pipe, my_select, "Pipe test");
+
+  return result;
+}
diff --git a/src/grep/gnulib-tests/test-setenv.c b/src/grep/gnulib-tests/test-setenv.c
new file mode 100644
index 0000000..034a7d2
--- /dev/null
+++ b/src/grep/gnulib-tests/test-setenv.c
@@ -0,0 +1,56 @@
+/* Tests of setenv.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <stdlib.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (setenv, int, (char const *, char const *, int));
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  /* Test overwriting.  */
+  ASSERT (setenv ("a", "==", -1) == 0);
+  ASSERT (setenv ("a", "2", 0) == 0);
+  ASSERT (strcmp (getenv ("a"), "==") == 0);
+
+  /* Required to fail with EINVAL.  */
+  errno = 0;
+  ASSERT (setenv ("", "", 1) == -1);
+  ASSERT (errno == EINVAL);
+  errno = 0;
+  ASSERT (setenv ("a=b", "", 0) == -1);
+  ASSERT (errno == EINVAL);
+#if 0
+  /* glibc and gnulib's implementation guarantee this, but POSIX no
+     longer requires it: http://austingroupbugs.net/view.php?id=185  */
+  errno = 0;
+  ASSERT (setenv (NULL, "", 0) == -1);
+  ASSERT (errno == EINVAL);
+#endif
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-setlocale1.c b/src/grep/gnulib-tests/test-setlocale1.c
new file mode 100644
index 0000000..f7897c1
--- /dev/null
+++ b/src/grep/gnulib-tests/test-setlocale1.c
@@ -0,0 +1,64 @@
+/* Test of setting the current locale.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <locale.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (setlocale, char *, (int, const char *));
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  char *name1;
+  char *name2;
+
+  /* Try to set the locale by implicitly looking at the LC_ALL environment
+     variable.
+     configure should already have checked that the locale is supported.  */
+  if (setlocale (LC_ALL, "") == NULL)
+    return 1;
+
+  name1 = strdup (setlocale (LC_ALL, NULL));
+
+  /* Reset the locale.  */
+  if (setlocale (LC_ALL, "C") == NULL)
+    return 1;
+
+  /* Try to set the locale by explicitly looking at the LC_ALL environment
+     variable.
+     configure should already have checked that the locale is supported.  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL)
+    return 1;
+
+  name2 = strdup (setlocale (LC_ALL, NULL));
+
+  ASSERT (name1);
+  ASSERT (name2);
+
+  /* Test that the two results are the same.  */
+  ASSERT (strcmp (name1, name2) == 0);
+  free (name1);
+  free (name2);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-setlocale1.sh b/src/grep/gnulib-tests/test-setlocale1.sh
new file mode 100755
index 0000000..53ad09f
--- /dev/null
+++ b/src/grep/gnulib-tests/test-setlocale1.sh
@@ -0,0 +1,34 @@
+#!/bin/sh
+
+: ${LOCALE_FR=fr_FR}
+: ${LOCALE_FR_UTF8=fr_FR.UTF-8}
+: ${LOCALE_JA=ja_JP}
+: ${LOCALE_ZH_CN=zh_CN.GB18030}
+
+if test $LOCALE_FR = none && test $LOCALE_FR_UTF8 = none \
+   && test $LOCALE_JA = none && test $LOCALE_ZH_CN = none; then
+  if test -f /usr/bin/localedef; then
+    echo "Skipping test: no locale for testing is installed"
+  else
+    echo "Skipping test: no locale for testing is supported"
+  fi
+  exit 77
+fi
+
+if test $LOCALE_FR != none; then
+  LC_ALL=$LOCALE_FR      ${CHECKER} ./test-setlocale1${EXEEXT} || exit 1
+fi
+
+if test $LOCALE_FR_UTF8 != none; then
+  LC_ALL=$LOCALE_FR_UTF8 ${CHECKER} ./test-setlocale1${EXEEXT} || exit 1
+fi
+
+if test $LOCALE_JA != none; then
+  LC_ALL=$LOCALE_JA      ${CHECKER} ./test-setlocale1${EXEEXT} || exit 1
+fi
+
+if test $LOCALE_ZH_CN != none; then
+  LC_ALL=$LOCALE_ZH_CN   ${CHECKER} ./test-setlocale1${EXEEXT} || exit 1
+fi
+
+exit 0
diff --git a/src/grep/gnulib-tests/test-setlocale2.c b/src/grep/gnulib-tests/test-setlocale2.c
new file mode 100644
index 0000000..ecb890b
--- /dev/null
+++ b/src/grep/gnulib-tests/test-setlocale2.c
@@ -0,0 +1,55 @@
+/* Test of setting the current locale.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <locale.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int
+main ()
+{
+  /* Try to set the locale by implicitly looking at the LC_ALL environment
+     variable.  */
+  if (setlocale (LC_ALL, "") != NULL)
+    /* It was successful.  Check whether LC_CTYPE is non-trivial.  */
+    if (strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+      {
+        fprintf (stderr, "setlocale did not fail for implicit %s\n",
+                 getenv ("LC_ALL"));
+        return 1;
+      }
+
+  /* Reset the locale.  */
+  if (setlocale (LC_ALL, "C") == NULL)
+    return 1;
+
+  /* Try to set the locale by explicitly looking at the LC_ALL environment
+     variable.  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) != NULL)
+    /* It was successful.  Check whether LC_CTYPE is non-trivial.  */
+    if (strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+      {
+        fprintf (stderr, "setlocale did not fail for explicit %s\n",
+                 getenv ("LC_ALL"));
+        return 1;
+      }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-setlocale2.sh b/src/grep/gnulib-tests/test-setlocale2.sh
new file mode 100755
index 0000000..79ea32f
--- /dev/null
+++ b/src/grep/gnulib-tests/test-setlocale2.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# Test locale names with likely unsupported encoding in Unix syntax.
+for name in ar_SA.ISO-8859-1 fr_FR.CP1251 zh_TW.GB18030 zh_CN.BIG5; do
+  env LC_ALL=$name ${CHECKER} ./test-setlocale2${EXEEXT} 1 || exit 1
+done
+
+# Test locale names with likely unsupported encoding in native Windows syntax.
+for name in "Arabic_Saudi Arabia.1252" "Arabic_Saudi Arabia.65001" \
+            French_France.65001 Japanese_Japan.65001 Turkish_Turkey.65001 \
+            Chinese_Taiwan.65001 Chinese_China.54936 Chinese_China.65001; do
+  # Here we use 'env' to set the LC_ALL environment variable, because on
+  # Solaris 11.0, the /bin/sh refuses to do it for Turkish_Turkey.65001.
+  env LC_ALL="$name" ${CHECKER} ./test-setlocale2${EXEEXT} 1 || exit 1
+done
+
+exit 0
diff --git a/src/grep/gnulib-tests/test-setlocale_null-mt-all.c b/src/grep/gnulib-tests/test-setlocale_null-mt-all.c
new file mode 100644
index 0000000..f733036
--- /dev/null
+++ b/src/grep/gnulib-tests/test-setlocale_null-mt-all.c
@@ -0,0 +1,172 @@
+/* Multithread-safety test for setlocale_null_r (LC_ALL, ...).
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+/* Work around GCC bug 44511.  */
+#if 4 < __GNUC__ + (3 <= __GNUC_MINOR__)
+# pragma GCC diagnostic ignored "-Wreturn-type"
+#endif
+
+#if USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS
+
+/* Specification.  */
+#include <locale.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "glthread/thread.h"
+
+/* We want to use the system's setlocale() function here, not the gnulib
+   override.  */
+#undef setlocale
+
+
+/* Some common locale names.  */
+
+#if defined _WIN32 && !defined __CYGWIN__
+# define ENGLISH "English_United States"
+# define GERMAN  "German_Germany"
+# define FRENCH  "French_France"
+# define ENCODING ".1252"
+#else
+# define ENGLISH "en_US"
+# define GERMAN  "de_DE"
+# define FRENCH  "fr_FR"
+# if defined __sgi
+#  define ENCODING ".ISO8859-15"
+# elif defined __hpux
+#  define ENCODING ".utf8"
+# else
+#  define ENCODING ".UTF-8"
+# endif
+#endif
+
+static const char LOCALE1[] = ENGLISH ENCODING;
+static const char LOCALE2[] = GERMAN ENCODING;
+static const char LOCALE3[] = FRENCH ENCODING;
+
+static char *expected;
+
+static void *
+thread1_func (void *arg)
+{
+  for (;;)
+    {
+      char buf[SETLOCALE_NULL_ALL_MAX];
+
+      if (setlocale_null_r (LC_ALL, buf, sizeof (buf)))
+        abort ();
+      if (strcmp (expected, buf) != 0)
+        {
+          fprintf (stderr, "thread1 disturbed by thread2!\n"); fflush (stderr);
+          abort ();
+        }
+    }
+
+  /*NOTREACHED*/
+}
+
+static void *
+thread2_func (void *arg)
+{
+  for (;;)
+    {
+      char buf[SETLOCALE_NULL_ALL_MAX];
+
+      setlocale_null_r (LC_NUMERIC, buf, sizeof (buf));
+      setlocale_null_r (LC_ALL, buf, sizeof (buf));
+    }
+
+  /*NOTREACHED*/
+}
+
+int
+main (int argc, char *argv[])
+{
+  if (setlocale (LC_ALL, LOCALE1) == NULL)
+    {
+      fprintf (stderr, "Skipping test: LOCALE1 not recognized\n");
+      return 77;
+    }
+  if (setlocale (LC_NUMERIC, LOCALE2) == NULL)
+    {
+      fprintf (stderr, "Skipping test: LOCALE2 not recognized\n");
+      return 77;
+    }
+  if (setlocale (LC_TIME, LOCALE3) == NULL)
+    {
+      fprintf (stderr, "Skipping test: LOCALE3 not recognized\n");
+      return 77;
+    }
+
+  expected = strdup (setlocale (LC_ALL, NULL));
+
+  /* Create the two threads.  */
+  gl_thread_create (thread1_func, NULL);
+  gl_thread_create (thread2_func, NULL);
+
+  /* Let them run for 5 seconds.  */
+  {
+    struct timespec duration;
+    duration.tv_sec = 5;
+    duration.tv_nsec = 0;
+
+    nanosleep (&duration, NULL);
+  }
+
+  return 0;
+}
+
+#else
+
+/* No multithreading available.  */
+
+#include <stdio.h>
+
+int
+main ()
+{
+  fputs ("Skipping test: multithreading not enabled\n", stderr);
+  return 77;
+}
+
+#endif
+
+/* Without locking, the results of this test would be:
+glibc                OK
+musl libc            crash < 10 sec
+macOS                crash < 1 sec
+FreeBSD              crash < 1 sec
+NetBSD               crash < 2 sec
+OpenBSD              crash < 1 sec
+AIX                  crash < 2 sec
+HP-UX                OK
+IRIX                 OK
+Solaris 10           OK
+Solaris 11.0         OK
+Solaris 11.4         OK
+Solaris OpenIndiana  OK
+Haiku                crash < 1 sec
+Cygwin               crash < 1 sec
+mingw                OK
+MSVC                 OK (assuming compiler option /MD !)
+*/
diff --git a/src/grep/gnulib-tests/test-setlocale_null-mt-one.c b/src/grep/gnulib-tests/test-setlocale_null-mt-one.c
new file mode 100644
index 0000000..5f9b85b
--- /dev/null
+++ b/src/grep/gnulib-tests/test-setlocale_null-mt-one.c
@@ -0,0 +1,172 @@
+/* Multithread-safety test for setlocale_null_r (LC_xxx, ...).
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+/* Work around GCC bug 44511.  */
+#if 4 < __GNUC__ + (3 <= __GNUC_MINOR__)
+# pragma GCC diagnostic ignored "-Wreturn-type"
+#endif
+
+#if USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS
+
+/* Specification.  */
+#include <locale.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "glthread/thread.h"
+
+/* We want to use the system's setlocale() function here, not the gnulib
+   override.  */
+#undef setlocale
+
+
+/* Some common locale names.  */
+
+#if defined _WIN32 && !defined __CYGWIN__
+# define ENGLISH "English_United States"
+# define GERMAN  "German_Germany"
+# define FRENCH  "French_France"
+# define ENCODING ".1252"
+#else
+# define ENGLISH "en_US"
+# define GERMAN  "de_DE"
+# define FRENCH  "fr_FR"
+# if defined __sgi
+#  define ENCODING ".ISO8859-15"
+# elif defined __hpux
+#  define ENCODING ".utf8"
+# else
+#  define ENCODING ".UTF-8"
+# endif
+#endif
+
+static const char LOCALE1[] = ENGLISH ENCODING;
+static const char LOCALE2[] = GERMAN ENCODING;
+static const char LOCALE3[] = FRENCH ENCODING;
+
+static char *expected;
+
+static void *
+thread1_func (void *arg)
+{
+  for (;;)
+    {
+      char buf[SETLOCALE_NULL_MAX];
+
+      if (setlocale_null_r (LC_NUMERIC, buf, sizeof (buf)))
+        abort ();
+      if (strcmp (expected, buf) != 0)
+        {
+          fprintf (stderr, "thread1 disturbed by thread2!\n"); fflush (stderr);
+          abort ();
+        }
+    }
+
+  /*NOTREACHED*/
+}
+
+static void *
+thread2_func (void *arg)
+{
+  for (;;)
+    {
+      char buf[SETLOCALE_NULL_MAX];
+
+      setlocale_null_r (LC_NUMERIC, buf, sizeof (buf));
+      setlocale_null_r (LC_TIME, buf, sizeof (buf));
+    }
+
+  /*NOTREACHED*/
+}
+
+int
+main (int argc, char *argv[])
+{
+  if (setlocale (LC_ALL, LOCALE1) == NULL)
+    {
+      fprintf (stderr, "Skipping test: LOCALE1 not recognized\n");
+      return 77;
+    }
+  if (setlocale (LC_NUMERIC, LOCALE2) == NULL)
+    {
+      fprintf (stderr, "Skipping test: LOCALE2 not recognized\n");
+      return 77;
+    }
+  if (setlocale (LC_TIME, LOCALE3) == NULL)
+    {
+      fprintf (stderr, "Skipping test: LOCALE3 not recognized\n");
+      return 77;
+    }
+
+  expected = strdup (setlocale (LC_NUMERIC, NULL));
+
+  /* Create the two threads.  */
+  gl_thread_create (thread1_func, NULL);
+  gl_thread_create (thread2_func, NULL);
+
+  /* Let them run for 2 seconds.  */
+  {
+    struct timespec duration;
+    duration.tv_sec = 2;
+    duration.tv_nsec = 0;
+
+    nanosleep (&duration, NULL);
+  }
+
+  return 0;
+}
+
+#else
+
+/* No multithreading available.  */
+
+#include <stdio.h>
+
+int
+main ()
+{
+  fputs ("Skipping test: multithreading not enabled\n", stderr);
+  return 77;
+}
+
+#endif
+
+/* Without locking, the results of this test would be:
+glibc                OK
+musl libc            OK
+macOS                OK
+FreeBSD              OK
+NetBSD               OK
+OpenBSD              crash < 1 sec
+AIX                  crash < 2 sec
+HP-UX                OK
+IRIX                 OK
+Solaris 10           OK
+Solaris 11.0         OK
+Solaris 11.4         OK
+Solaris OpenIndiana  OK
+Haiku                OK
+Cygwin               OK
+mingw                OK
+MSVC                 OK (assuming compiler option /MD !)
+*/
diff --git a/src/grep/gnulib-tests/test-setlocale_null.c b/src/grep/gnulib-tests/test-setlocale_null.c
new file mode 100644
index 0000000..ebe0d36
--- /dev/null
+++ b/src/grep/gnulib-tests/test-setlocale_null.c
@@ -0,0 +1,32 @@
+/* Test of setlocale_null_r function.
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <locale.h>
+
+/* Check that SETLOCALE_NULL_ALL_MAX is a constant expression.  */
+static char buf[SETLOCALE_NULL_ALL_MAX];
+
+int
+main ()
+{
+  /* Check that setlocale_null_r() can be used with $(LIB_SETLOCALE_NULL).  */
+  return setlocale_null_r (LC_ALL, buf, sizeof (buf)) != 0;
+}
diff --git a/src/grep/gnulib-tests/test-setsockopt.c b/src/grep/gnulib-tests/test-setsockopt.c
new file mode 100644
index 0000000..09ae1aa
--- /dev/null
+++ b/src/grep/gnulib-tests/test-setsockopt.c
@@ -0,0 +1,55 @@
+/* Test setsockopt() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (setsockopt, int, (int, int, int, const void *, socklen_t));
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "sockets.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    int value = 1;
+
+    errno = 0;
+    ASSERT (setsockopt (-1, SOL_SOCKET, SO_REUSEADDR, &value, sizeof (value))
+            == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    int value = 1;
+
+    close (99);
+    errno = 0;
+    ASSERT (setsockopt (99, SOL_SOCKET, SO_REUSEADDR, &value, sizeof (value))
+            == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-sigaction.c b/src/grep/gnulib-tests/test-sigaction.c
new file mode 100644
index 0000000..fc4a45c
--- /dev/null
+++ b/src/grep/gnulib-tests/test-sigaction.c
@@ -0,0 +1,122 @@
+/* Test of sigaction() function.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2008.  */
+
+#include <config.h>
+
+#include <signal.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (sigaction, int, (int, struct sigaction const *,
+                                  struct sigaction *));
+
+#include <stddef.h>
+
+#include "macros.h"
+
+#ifndef SA_NOCLDSTOP
+# define SA_NOCLDSTOP 0
+#endif
+#ifndef SA_ONSTACK
+# define SA_ONSTACK 0
+#endif
+#ifndef SA_RESETHAND
+# define SA_RESETHAND 0
+#endif
+#ifndef SA_RESTART
+# define SA_RESTART 0
+#endif
+#ifndef SA_SIGINFO
+# define SA_SIGINFO 0
+#endif
+#ifndef SA_NOCLDWAIT
+# define SA_NOCLDWAIT 0
+#endif
+
+/* Define a mask of flags required by POSIX.  Some implementations
+   provide other flags as extensions, such as SA_RESTORER, that we
+   must ignore in this test.  */
+#define MASK_SA_FLAGS (SA_NOCLDSTOP | SA_ONSTACK | SA_RESETHAND | SA_RESTART \
+                       | SA_SIGINFO | SA_NOCLDWAIT | SA_NODEFER)
+
+/* This test is unsafe in the presence of an asynchronous SIGABRT,
+   because we install a signal-handler that is intentionally not
+   async-safe.  Hopefully, this does not lead to too many reports of
+   false failures, since people don't generally use 'kill -s SIGABRT'
+   to end a runaway program.  */
+
+static void
+handler (int sig)
+{
+  static int entry_count;
+  struct sigaction sa;
+  ASSERT (sig == SIGABRT);
+  ASSERT (sigaction (SIGABRT, NULL, &sa) == 0);
+  ASSERT ((sa.sa_flags & SA_SIGINFO) == 0);
+  switch (entry_count++)
+    {
+    case 0:
+      ASSERT ((sa.sa_flags & SA_RESETHAND) == 0);
+      ASSERT (sa.sa_handler == handler);
+      break;
+    case 1:
+      /* This assertion fails on glibc-2.3.6 systems with LinuxThreads,
+         when this program is linked with -lpthread, due to the sigaction()
+         override in libpthread.so.  */
+#if !(defined __GLIBC__ || defined __UCLIBC__)
+      ASSERT (sa.sa_handler == SIG_DFL);
+#endif
+      break;
+    default:
+      ASSERT (0);
+    }
+}
+
+int
+main (void)
+{
+  struct sigaction sa;
+  struct sigaction old_sa;
+  sa.sa_handler = handler;
+
+  sa.sa_flags = 0;
+  ASSERT (sigemptyset (&sa.sa_mask) == 0);
+  ASSERT (sigaction (SIGABRT, &sa, NULL) == 0);
+  ASSERT (raise (SIGABRT) == 0);
+
+  sa.sa_flags = SA_RESETHAND | SA_NODEFER;
+  ASSERT (sigaction (SIGABRT, &sa, &old_sa) == 0);
+  ASSERT ((old_sa.sa_flags & MASK_SA_FLAGS) == 0);
+  ASSERT (old_sa.sa_handler == handler);
+  ASSERT (raise (SIGABRT) == 0);
+
+  sa.sa_handler = SIG_DFL;
+  ASSERT (sigaction (SIGABRT, &sa, &old_sa) == 0);
+  ASSERT ((old_sa.sa_flags & SA_SIGINFO) == 0);
+#if !(defined __GLIBC__ || defined __UCLIBC__) /* see above */
+  ASSERT (old_sa.sa_handler == SIG_DFL);
+#endif
+
+  sa.sa_handler = SIG_IGN;
+  ASSERT (sigaction (SIGABRT, &sa, NULL) == 0);
+  ASSERT (raise (SIGABRT) == 0);
+  ASSERT (sigaction (SIGABRT, NULL, &old_sa) == 0);
+  ASSERT (old_sa.sa_handler == SIG_IGN);
+  ASSERT (raise (SIGABRT) == 0);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-signal-h.c b/src/grep/gnulib-tests/test-signal-h.c
new file mode 100644
index 0000000..b9d5176
--- /dev/null
+++ b/src/grep/gnulib-tests/test-signal-h.c
@@ -0,0 +1,129 @@
+/* Test of <signal.h> substitute.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <signal.h>
+
+/* Check for required types.  */
+struct
+{
+  size_t a;
+  uid_t b;
+  volatile sig_atomic_t c;
+  sigset_t d;
+  pid_t e;
+#if 0
+  /* Not guaranteed by gnulib.  */
+  pthread_t f;
+  struct timespec g;
+#endif
+} s;
+
+/* Check that NSIG is defined.  */
+int nsig = NSIG;
+
+int
+main (void)
+{
+  switch (0)
+    {
+      /* The following are guaranteed by C.  */
+    case 0:
+    case SIGABRT:
+    case SIGFPE:
+    case SIGILL:
+    case SIGINT:
+    case SIGSEGV:
+    case SIGTERM:
+      /* The following is guaranteed by gnulib.  */
+#if GNULIB_SIGPIPE || defined SIGPIPE
+    case SIGPIPE:
+#endif
+      /* Ensure no conflict with other standardized names.  */
+#ifdef SIGALRM
+    case SIGALRM:
+#endif
+      /* On Haiku, SIGBUS is mistakenly equal to SIGSEGV.  */
+#if defined SIGBUS && SIGBUS != SIGSEGV
+    case SIGBUS:
+#endif
+#ifdef SIGCHLD
+    case SIGCHLD:
+#endif
+#ifdef SIGCONT
+    case SIGCONT:
+#endif
+#ifdef SIGHUP
+    case SIGHUP:
+#endif
+#ifdef SIGKILL
+    case SIGKILL:
+#endif
+#ifdef SIGQUIT
+    case SIGQUIT:
+#endif
+#ifdef SIGSTOP
+    case SIGSTOP:
+#endif
+#ifdef SIGTSTP
+    case SIGTSTP:
+#endif
+#ifdef SIGTTIN
+    case SIGTTIN:
+#endif
+#ifdef SIGTTOU
+    case SIGTTOU:
+#endif
+#ifdef SIGUSR1
+    case SIGUSR1:
+#endif
+#ifdef SIGUSR2
+    case SIGUSR2:
+#endif
+#ifdef SIGSYS
+    case SIGSYS:
+#endif
+#ifdef SIGTRAP
+    case SIGTRAP:
+#endif
+#ifdef SIGURG
+    case SIGURG:
+#endif
+#ifdef SIGVTALRM
+    case SIGVTALRM:
+#endif
+#ifdef SIGXCPU
+    case SIGXCPU:
+#endif
+#ifdef SIGXFSZ
+    case SIGXFSZ:
+#endif
+      /* SIGRTMIN and SIGRTMAX need not be compile-time constants.  */
+#if 0
+# ifdef SIGRTMIN
+    case SIGRTMIN:
+# endif
+# ifdef SIGRTMAX
+    case SIGRTMAX:
+# endif
+#endif
+      ;
+    }
+  return s.a + s.b + s.c + s.e;
+}
diff --git a/src/grep/gnulib-tests/test-sigprocmask.c b/src/grep/gnulib-tests/test-sigprocmask.c
new file mode 100644
index 0000000..bf000d7
--- /dev/null
+++ b/src/grep/gnulib-tests/test-sigprocmask.c
@@ -0,0 +1,102 @@
+/* Test of sigprocmask.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include <signal.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (sigprocmask, int, (int, const sigset_t *, sigset_t *));
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#if !(defined _WIN32 && !defined __CYGWIN__)
+
+static volatile int sigint_occurred;
+
+static void
+sigint_handler (int sig)
+{
+  sigint_occurred++;
+}
+
+int
+main (int argc, char *argv[])
+{
+  sigset_t set;
+  pid_t pid = getpid ();
+  char command[80];
+
+  if (sizeof (int) < sizeof pid && 0x7fffffff < pid)
+    {
+      fputs ("Skipping test: pid too large\n", stderr);
+      return 77;
+    }
+
+  signal (SIGINT, sigint_handler);
+
+  sigemptyset (&set);
+  sigaddset (&set, SIGINT);
+
+  /* Check error handling.  */
+  ASSERT (sigprocmask (1729, &set, NULL) == -1);
+  ASSERT (errno == EINVAL);
+
+  /* Block SIGINT.  */
+  ASSERT (sigprocmask (SIG_BLOCK, &set, NULL) == 0);
+
+  /* Request a SIGINT signal from outside.  */
+  sprintf (command, "sh -c 'sleep 1; kill -%d %d' &", SIGINT, (int) pid);
+  ASSERT (system (command) == 0);
+
+  /* Wait.  */
+  sleep (2);
+
+  /* The signal should not have arrived yet, because it is blocked.  */
+  ASSERT (sigint_occurred == 0);
+
+  /* Unblock SIGINT.  */
+  ASSERT (sigprocmask (SIG_UNBLOCK, &set, NULL) == 0);
+
+  /* The signal should have arrived now, because POSIX says
+       "If there are any pending unblocked signals after the call to
+        sigprocmask(), at least one of those signals shall be delivered
+        before the call to sigprocmask() returns."  */
+  ASSERT (sigint_occurred == 1);
+
+  return 0;
+}
+
+#else
+
+/* On native Windows, getpid() values and the arguments that are passed to
+   the (Cygwin?) 'kill' program are not necessarily related.  */
+
+int
+main ()
+{
+  fputs ("Skipping test: native Windows platform\n", stderr);
+  return 77;
+}
+
+#endif
diff --git a/src/grep/gnulib-tests/test-sigsegv-catch-segv1.c b/src/grep/gnulib-tests/test-sigsegv-catch-segv1.c
new file mode 100644
index 0000000..4f6989e
--- /dev/null
+++ b/src/grep/gnulib-tests/test-sigsegv-catch-segv1.c
@@ -0,0 +1,130 @@
+/* Test that the handler is called, with the right fault address.
+   Copyright (C) 2002-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "sigsegv.h"
+
+#include <stdint.h>
+#include <stdio.h>
+
+#if HAVE_SIGSEGV_RECOVERY
+
+# include "mmap-anon-util.h"
+# include <stdlib.h>
+
+# if SIGSEGV_FAULT_ADDRESS_ALIGNMENT > 1UL
+#  include <unistd.h>
+#  define SIGSEGV_FAULT_ADDRESS_ROUNDOFF_BITS (getpagesize () - 1)
+# else
+#  define SIGSEGV_FAULT_ADDRESS_ROUNDOFF_BITS 0
+# endif
+
+uintptr_t page;
+
+volatile int handler_called = 0;
+
+static int
+handler (void *fault_address, int serious)
+{
+  handler_called++;
+  if (handler_called > 10)
+    abort ();
+  if (fault_address
+      != (void *)((page + 0x678) & ~SIGSEGV_FAULT_ADDRESS_ROUNDOFF_BITS))
+    abort ();
+  if (mprotect ((void *) page, 0x4000, PROT_READ_WRITE) == 0)
+    return 1;
+  return 0;
+}
+
+static void
+crasher (uintptr_t p)
+{
+  *(volatile int *) (p + 0x678) = 42;
+}
+
+int
+main ()
+{
+  int prot_unwritable;
+  void *p;
+
+  /* Preparations.  */
+# if !HAVE_MAP_ANONYMOUS
+  zero_fd = open ("/dev/zero", O_RDONLY, 0644);
+# endif
+
+# if defined __linux__ && defined __sparc__
+  /* On Linux 2.6.26/SPARC64, PROT_READ has the same effect as
+     PROT_READ | PROT_WRITE.  */
+  prot_unwritable = PROT_NONE;
+# else
+  prot_unwritable = PROT_READ;
+# endif
+
+  /* Setup some mmaped memory.  */
+  p = mmap_zeromap ((void *) 0x12340000, 0x4000);
+  if (p == (void *)(-1))
+    {
+      fprintf (stderr, "mmap_zeromap failed.\n");
+      exit (2);
+    }
+  page = (uintptr_t) p;
+
+  /* Make it read-only.  */
+  if (mprotect ((void *) page, 0x4000, prot_unwritable) < 0)
+    {
+      fprintf (stderr, "mprotect failed.\n");
+      exit (2);
+    }
+  /* Test whether it's possible to make it read-write after it was read-only.
+     This is not possible on Cygwin.  */
+  if (mprotect ((void *) page, 0x4000, PROT_READ_WRITE) < 0
+      || mprotect ((void *) page, 0x4000, prot_unwritable) < 0)
+    {
+      fprintf (stderr, "mprotect failed.\n");
+      exit (2);
+    }
+
+  /* Install the SIGSEGV handler.  */
+  sigsegv_install_handler (&handler);
+
+  /* The first write access should invoke the handler and then complete.  */
+  crasher (page);
+  /* The second write access should not invoke the handler.  */
+  crasher (page);
+
+  /* Check that the handler was called only once.  */
+  if (handler_called != 1)
+    exit (1);
+  /* Test passed!  */
+  printf ("Test passed.\n");
+  return 0;
+}
+
+#else
+
+int
+main ()
+{
+  return 77;
+}
+
+#endif
diff --git a/src/grep/gnulib-tests/test-sigsegv-catch-segv2.c b/src/grep/gnulib-tests/test-sigsegv-catch-segv2.c
new file mode 100644
index 0000000..b2a4804
--- /dev/null
+++ b/src/grep/gnulib-tests/test-sigsegv-catch-segv2.c
@@ -0,0 +1,153 @@
+/* Test that the handler can be exited multiple times.
+   Copyright (C) 2002-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "sigsegv.h"
+
+#include <stdint.h>
+#include <stdio.h>
+
+#if HAVE_SIGSEGV_RECOVERY
+
+# if defined _WIN32 && !defined __CYGWIN__
+  /* Windows doesn't have sigset_t.  */
+  typedef int sigset_t;
+#  define sigemptyset(set)
+#  define sigprocmask(how,set,oldset)
+# endif
+
+# include "mmap-anon-util.h"
+# include <stdlib.h> /* for abort, exit */
+# include <signal.h>
+# include <setjmp.h>
+
+# if SIGSEGV_FAULT_ADDRESS_ALIGNMENT > 1UL
+#  include <unistd.h>
+#  define SIGSEGV_FAULT_ADDRESS_ROUNDOFF_BITS (getpagesize () - 1)
+# else
+#  define SIGSEGV_FAULT_ADDRESS_ROUNDOFF_BITS 0
+# endif
+
+jmp_buf mainloop;
+sigset_t mainsigset;
+
+volatile int pass = 0;
+uintptr_t page;
+
+volatile int handler_called = 0;
+
+static void
+handler_continuation (void *arg1, void *arg2, void *arg3)
+{
+  longjmp (mainloop, pass);
+}
+
+int
+handler (void *fault_address, int serious)
+{
+  handler_called++;
+  if (handler_called > 10)
+    abort ();
+  if (fault_address
+      != (void *)((page + 0x678 + 8 * pass) & ~SIGSEGV_FAULT_ADDRESS_ROUNDOFF_BITS))
+    abort ();
+  pass++;
+  printf ("Fault %d caught.\n", pass);
+  sigprocmask (SIG_SETMASK, &mainsigset, NULL);
+  return sigsegv_leave_handler (handler_continuation, NULL, NULL, NULL);
+}
+
+void
+crasher (uintptr_t p)
+{
+  *(volatile int *) (p + 0x678 + 8 * pass) = 42;
+}
+
+int
+main ()
+{
+  int prot_unwritable;
+  void *p;
+  sigset_t emptyset;
+
+  /* Preparations.  */
+# if !HAVE_MAP_ANONYMOUS
+  zero_fd = open ("/dev/zero", O_RDONLY, 0644);
+# endif
+
+# if defined __linux__ && defined __sparc__
+  /* On Linux 2.6.26/SPARC64, PROT_READ has the same effect as
+     PROT_READ | PROT_WRITE.  */
+  prot_unwritable = PROT_NONE;
+# else
+  prot_unwritable = PROT_READ;
+# endif
+
+  /* Setup some mmaped memory.  */
+  p = mmap_zeromap ((void *) 0x12340000, 0x4000);
+  if (p == (void *)(-1))
+    {
+      fprintf (stderr, "mmap_zeromap failed.\n");
+      exit (2);
+    }
+  page = (uintptr_t) p;
+
+  /* Make it read-only.  */
+  if (mprotect ((void *) page, 0x4000, prot_unwritable) < 0)
+    {
+      fprintf (stderr, "mprotect failed.\n");
+      exit (2);
+    }
+
+  /* Install the SIGSEGV handler.  */
+  if (sigsegv_install_handler (&handler) < 0)
+    exit (2);
+
+  /* Save the current signal mask.  */
+  sigemptyset (&emptyset);
+  sigprocmask (SIG_BLOCK, &emptyset, &mainsigset);
+
+  /* Provoke two SIGSEGVs in a row.  */
+  switch (setjmp (mainloop))
+    {
+    case 0: case 1:
+      printf ("Doing SIGSEGV pass %d.\n", pass + 1);
+      crasher (page);
+      printf ("no SIGSEGV?!\n"); exit (1);
+    case 2:
+      break;
+    default:
+      abort ();
+    }
+
+  /* Test passed!  */
+  printf ("Test passed.\n");
+  return 0;
+}
+
+#else
+
+int
+main ()
+{
+  return 77;
+}
+
+#endif
diff --git a/src/grep/gnulib-tests/test-sigsegv-catch-stackoverflow1.c b/src/grep/gnulib-tests/test-sigsegv-catch-stackoverflow1.c
new file mode 100644
index 0000000..3c22997
--- /dev/null
+++ b/src/grep/gnulib-tests/test-sigsegv-catch-stackoverflow1.c
@@ -0,0 +1,149 @@
+/* Test the stack overflow handler.
+   Copyright (C) 2002-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible and Eric Blake.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "sigsegv.h"
+
+#include <stdio.h>
+#include <limits.h>
+
+#if HAVE_STACK_OVERFLOW_RECOVERY
+
+# if defined _WIN32 && !defined __CYGWIN__
+  /* Windows doesn't have sigset_t.  */
+  typedef int sigset_t;
+#  define sigemptyset(set)
+#  define sigprocmask(how,set,oldset)
+# endif
+
+# include <stddef.h> /* needed for NULL on SunOS4 */
+# include <stdlib.h> /* for abort, exit */
+# include <signal.h>
+# include <setjmp.h>
+# if HAVE_SETRLIMIT
+#  include <sys/types.h>
+#  include <sys/time.h>
+#  include <sys/resource.h>
+# endif
+# include "altstack-util.h"
+
+static jmp_buf mainloop;
+static sigset_t mainsigset;
+
+static volatile int pass = 0;
+
+static volatile char *stack_lower_bound;
+static volatile char *stack_upper_bound;
+
+static void
+stackoverflow_handler_continuation (void *arg1, void *arg2, void *arg3)
+{
+  int arg = (int) (long) arg1;
+  longjmp (mainloop, arg);
+}
+
+static void
+stackoverflow_handler (int emergency, stackoverflow_context_t scp)
+{
+  char dummy;
+  volatile char *addr = &dummy;
+  if (!(addr >= stack_lower_bound && addr <= stack_upper_bound))
+    abort ();
+  pass++;
+  printf ("Stack overflow %d caught.\n", pass);
+  sigprocmask (SIG_SETMASK, &mainsigset, NULL);
+  sigsegv_leave_handler (stackoverflow_handler_continuation,
+                         (void *) (long) (emergency ? -1 : pass), NULL, NULL);
+}
+
+static volatile int *
+recurse_1 (int n, volatile int *p)
+{
+  if (n < INT_MAX)
+    *recurse_1 (n + 1, p) += n;
+  return p;
+}
+
+static int
+recurse (volatile int n)
+{
+  return *recurse_1 (n, &n);
+}
+
+int
+main ()
+{
+  sigset_t emptyset;
+
+# if HAVE_SETRLIMIT && defined RLIMIT_STACK
+  /* Before starting the endless recursion, try to be friendly to the user's
+     machine.  On some Linux 2.2.x systems, there is no stack limit for user
+     processes at all.  We don't want to kill such systems.  */
+  struct rlimit rl;
+  rl.rlim_cur = rl.rlim_max = 0x100000; /* 1 MB */
+  setrlimit (RLIMIT_STACK, &rl);
+# endif
+
+  /* Prepare the storage for the alternate stack.  */
+  prepare_alternate_stack ();
+
+  /* Install the stack overflow handler.  */
+  if (stackoverflow_install_handler (&stackoverflow_handler,
+                                     mystack, MYSTACK_SIZE)
+      < 0)
+    exit (2);
+  stack_lower_bound = mystack;
+  stack_upper_bound = mystack + MYSTACK_SIZE - 1;
+
+  /* Save the current signal mask.  */
+  sigemptyset (&emptyset);
+  sigprocmask (SIG_BLOCK, &emptyset, &mainsigset);
+
+  /* Provoke two stack overflows in a row.  */
+  switch (setjmp (mainloop))
+    {
+    case -1:
+      printf ("emergency exit\n"); exit (1);
+    case 0: case 1:
+      printf ("Starting recursion pass %d.\n", pass + 1);
+      recurse (0);
+      printf ("no endless recursion?!\n"); exit (1);
+    case 2:
+      break;
+    default:
+      abort ();
+    }
+
+  /* Validate that the alternate stack did not overflow.  */
+  check_alternate_stack_no_overflow ();
+
+  printf ("Test passed.\n");
+  exit (0);
+}
+
+#else
+
+int
+main ()
+{
+  return 77;
+}
+
+#endif
diff --git a/src/grep/gnulib-tests/test-sigsegv-catch-stackoverflow2.c b/src/grep/gnulib-tests/test-sigsegv-catch-stackoverflow2.c
new file mode 100644
index 0000000..ea79b96
--- /dev/null
+++ b/src/grep/gnulib-tests/test-sigsegv-catch-stackoverflow2.c
@@ -0,0 +1,211 @@
+/* Test that stack overflow and SIGSEGV are correctly distinguished.
+   Copyright (C) 2002-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible and Eric Blake.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "sigsegv.h"
+
+#include <stdint.h>
+#include <stdio.h>
+#include <limits.h>
+
+#if HAVE_STACK_OVERFLOW_RECOVERY && HAVE_SIGSEGV_RECOVERY
+
+# if defined _WIN32 && !defined __CYGWIN__
+  /* Windows doesn't have sigset_t.  */
+  typedef int sigset_t;
+#  define sigemptyset(set)
+#  define sigprocmask(how,set,oldset)
+# endif
+
+# include "mmap-anon-util.h"
+# include <stddef.h> /* needed for NULL on SunOS4 */
+# include <stdlib.h> /* for abort, exit */
+# include <signal.h>
+# include <setjmp.h>
+# if HAVE_SETRLIMIT
+#  include <sys/types.h>
+#  include <sys/time.h>
+#  include <sys/resource.h>
+# endif
+# include "altstack-util.h"
+
+static jmp_buf mainloop;
+static sigset_t mainsigset;
+
+static volatile int pass = 0;
+static uintptr_t page;
+static volatile int *null_pointer_to_volatile_int /* = NULL */;
+
+static void
+stackoverflow_handler_continuation (void *arg1, void *arg2, void *arg3)
+{
+  int arg = (int) (long) arg1;
+  longjmp (mainloop, arg);
+}
+
+static void
+stackoverflow_handler (int emergency, stackoverflow_context_t scp)
+{
+  pass++;
+  if (pass <= 2)
+    printf ("Stack overflow %d caught.\n", pass);
+  else
+    {
+      printf ("Segmentation violation misdetected as stack overflow.\n");
+      exit (1);
+    }
+  sigprocmask (SIG_SETMASK, &mainsigset, NULL);
+  sigsegv_leave_handler (stackoverflow_handler_continuation,
+                         (void *) (long) (emergency ? -1 : pass), NULL, NULL);
+}
+
+static int
+sigsegv_handler (void *address, int emergency)
+{
+  /* This test is necessary to distinguish stack overflow and SIGSEGV.  */
+  if (!emergency)
+    return 0;
+
+  pass++;
+  if (pass <= 2)
+    {
+      printf ("Stack overflow %d missed.\n", pass);
+      exit (1);
+    }
+  else
+    printf ("Segmentation violation correctly detected.\n");
+  sigprocmask (SIG_SETMASK, &mainsigset, NULL);
+  return sigsegv_leave_handler (stackoverflow_handler_continuation,
+                                (void *) (long) pass, NULL, NULL);
+}
+
+static volatile int *
+recurse_1 (int n, volatile int *p)
+{
+  if (n < INT_MAX)
+    *recurse_1 (n + 1, p) += n;
+  return p;
+}
+
+static int
+recurse (volatile int n)
+{
+  return *recurse_1 (n, &n);
+}
+
+int
+main ()
+{
+  int prot_unwritable;
+  void *p;
+  sigset_t emptyset;
+
+# if HAVE_SETRLIMIT && defined RLIMIT_STACK
+  /* Before starting the endless recursion, try to be friendly to the user's
+     machine.  On some Linux 2.2.x systems, there is no stack limit for user
+     processes at all.  We don't want to kill such systems.  */
+  struct rlimit rl;
+  rl.rlim_cur = rl.rlim_max = 0x100000; /* 1 MB */
+  setrlimit (RLIMIT_STACK, &rl);
+# endif
+
+  /* Prepare the storage for the alternate stack.  */
+  prepare_alternate_stack ();
+
+  /* Install the stack overflow handler.  */
+  if (stackoverflow_install_handler (&stackoverflow_handler,
+                                     mystack, MYSTACK_SIZE)
+      < 0)
+    exit (2);
+
+  /* Preparations.  */
+# if !HAVE_MAP_ANONYMOUS
+  zero_fd = open ("/dev/zero", O_RDONLY, 0644);
+# endif
+
+# if defined __linux__ && defined __sparc__
+  /* On Linux 2.6.26/SPARC64, PROT_READ has the same effect as
+     PROT_READ | PROT_WRITE.  */
+  prot_unwritable = PROT_NONE;
+# else
+  prot_unwritable = PROT_READ;
+# endif
+
+  /* Setup some mmaped memory.  */
+  p = mmap_zeromap ((void *) 0x12340000, 0x4000);
+  if (p == (void *)(-1))
+    {
+      fprintf (stderr, "mmap_zeromap failed.\n");
+      exit (2);
+    }
+  page = (uintptr_t) p;
+
+  /* Make it read-only.  */
+  if (mprotect ((void *) page, 0x4000, prot_unwritable) < 0)
+    {
+      fprintf (stderr, "mprotect failed.\n");
+      exit (2);
+    }
+
+  /* Install the SIGSEGV handler.  */
+  if (sigsegv_install_handler (&sigsegv_handler) < 0)
+    exit (2);
+
+  /* Save the current signal mask.  */
+  sigemptyset (&emptyset);
+  sigprocmask (SIG_BLOCK, &emptyset, &mainsigset);
+
+  /* Provoke two stack overflows in a row.  */
+  switch (setjmp (mainloop))
+    {
+    case -1:
+      printf ("emergency exit\n"); exit (1);
+    case 0: case 1:
+      printf ("Starting recursion pass %d.\n", pass + 1);
+      recurse (0);
+      printf ("no endless recursion?!\n"); exit (1);
+    case 2:
+      *(volatile int *) (page + 0x678) = 42;
+      break;
+    case 3:
+      *null_pointer_to_volatile_int = 42;
+      break;
+    case 4:
+      break;
+    default:
+      abort ();
+    }
+
+  /* Validate that the alternate stack did not overflow.  */
+  check_alternate_stack_no_overflow ();
+
+  printf ("Test passed.\n");
+  exit (0);
+}
+
+#else
+
+int
+main ()
+{
+  return 77;
+}
+
+#endif
diff --git a/src/grep/gnulib-tests/test-sleep.c b/src/grep/gnulib-tests/test-sleep.c
new file mode 100644
index 0000000..be9ee83
--- /dev/null
+++ b/src/grep/gnulib-tests/test-sleep.c
@@ -0,0 +1,58 @@
+/* Test of sleep() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (sleep, unsigned int, (unsigned int));
+
+#include <signal.h>
+
+#include "macros.h"
+
+#if HAVE_DECL_ALARM
+static void
+handle_alarm (int sig)
+{
+  if (sig != SIGALRM)
+    _exit (1);
+}
+#endif
+
+int
+main (void)
+{
+  ASSERT (sleep (1) <= 1);
+
+  ASSERT (sleep (0) == 0);
+
+#if HAVE_DECL_ALARM
+  {
+    const unsigned int pentecost = 50 * 24 * 60 * 60; /* 50 days.  */
+    unsigned int remaining;
+    signal (SIGALRM, handle_alarm);
+    alarm (1);
+    remaining = sleep (pentecost);
+    ASSERT (pentecost - 10 < remaining && remaining <= pentecost);
+  }
+#endif
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-snprintf.c b/src/grep/gnulib-tests/test-snprintf.c
new file mode 100644
index 0000000..ea6de1c
--- /dev/null
+++ b/src/grep/gnulib-tests/test-snprintf.c
@@ -0,0 +1,72 @@
+/* Test of snprintf() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (snprintf, int, (char *, size_t, char const *, ...));
+
+#include <string.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  char buf[8];
+  int size;
+  int retval;
+
+  retval = snprintf (NULL, 0, "%d", 12345);
+  ASSERT (retval == 5);
+
+  for (size = 0; size <= 8; size++)
+    {
+      memcpy (buf, "DEADBEEF", 8);
+      retval = snprintf (buf, size, "%d", 12345);
+      ASSERT (retval == 5);
+      if (size < 6)
+        {
+          if (size > 0)
+            {
+              ASSERT (memcmp (buf, "12345", size - 1) == 0);
+              ASSERT (buf[size - 1] == '\0' || buf[size - 1] == '0' + size);
+            }
+#if !CHECK_SNPRINTF_POSIX
+          if (size > 0)
+#endif
+            ASSERT (memcmp (buf + size, &"DEADBEEF"[size], 8 - size) == 0);
+        }
+      else
+        {
+          ASSERT (memcmp (buf, "12345\0EF", 8) == 0);
+        }
+    }
+
+  /* Test the support of the POSIX/XSI format strings with positions.  */
+  {
+    char result[100];
+    retval = snprintf (result, sizeof (result), "%2$d %1$d", 33, 55);
+    ASSERT (strcmp (result, "55 33") == 0);
+    ASSERT (retval == strlen (result));
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-sockets.c b/src/grep/gnulib-tests/test-sockets.c
new file mode 100644
index 0000000..8fd603c
--- /dev/null
+++ b/src/grep/gnulib-tests/test-sockets.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2008-2021 Free Software Foundation, Inc.
+ * Written by Simon Josefsson.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "sockets.h"
+
+int
+main (void)
+{
+  int err;
+
+  err = gl_sockets_startup (SOCKETS_1_1);
+  if (err != 0)
+    {
+      printf ("wsastartup failed %d\n", err);
+      return 1;
+    }
+
+  err = gl_sockets_cleanup ();
+  if (err != 0)
+    {
+      printf ("wsacleanup failed %d\n", err);
+      return 1;
+    }
+
+  (void) gl_fd_to_handle (0);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-stat-time.c b/src/grep/gnulib-tests/test-stat-time.c
new file mode 100644
index 0000000..cd0f3c3
--- /dev/null
+++ b/src/grep/gnulib-tests/test-stat-time.c
@@ -0,0 +1,248 @@
+/* Test of <stat-time.h>.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by James Youngman <jay@gnu.org>, 2007.  */
+
+#include <config.h>
+
+#include "stat-time.h"
+
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <time.h>
+
+#include "macros.h"
+
+#define BASE "test-stat-time.t"
+#include "nap.h"
+
+enum { NFILES = 4 };
+
+static char filename_stamp1[50];
+static char filename_testfile[50];
+static char filename_stamp2[50];
+static char filename_stamp3[50];
+
+/* Use file names that are different at each run.
+   This is necessary for test_birthtime() to pass on native Windows:
+   On this platform, the file system apparently remembers the creation time
+   of a file even after it is removed and created anew.  See
+   "Windows NT Contains File System Tunneling Capabilities"
+   <https://support.microsoft.com/en-us/help/172190/>  */
+static void
+initialize_filenames (void)
+{
+  long t = (long) time (NULL);
+  sprintf (filename_stamp1,   "t-stt-%ld-stamp1", t);
+  sprintf (filename_testfile, "t-stt-%ld-testfile", t);
+  sprintf (filename_stamp2,   "t-stt-%ld-stamp2", t);
+  sprintf (filename_stamp3,   "t-stt-%ld-stamp3", t);
+}
+
+static int
+force_unlink (const char *filename)
+{
+  /* This chmod is necessary on mingw, where unlink() of a read-only file
+     fails with EPERM.  */
+  chmod (filename, 0600);
+  return unlink (filename);
+}
+
+static void
+cleanup (int sig)
+{
+  /* Remove temporary files.  */
+  force_unlink (filename_stamp1);
+  force_unlink (filename_testfile);
+  force_unlink (filename_stamp2);
+  force_unlink (filename_stamp3);
+
+  if (sig != 0)
+    _exit (1);
+}
+
+static int
+open_file (const char *filename, int flags)
+{
+  int fd = open (filename, flags | O_WRONLY, 0500);
+  if (fd >= 0)
+    {
+      close (fd);
+      return 1;
+    }
+  else
+    {
+      return 0;
+    }
+}
+
+static void
+create_file (const char *filename)
+{
+  ASSERT (open_file (filename, O_CREAT | O_EXCL));
+}
+
+static void
+do_stat (const char *filename, struct stat *p)
+{
+  ASSERT (stat (filename, p) == 0);
+}
+
+static void
+prepare_test (struct stat *statinfo, struct timespec *modtimes)
+{
+  int i;
+
+  create_file (filename_stamp1);
+  nap ();
+  create_file (filename_testfile);
+  nap ();
+  create_file (filename_stamp2);
+  nap ();
+  ASSERT (chmod (filename_testfile, 0400) == 0);
+  nap ();
+  create_file (filename_stamp3);
+
+  do_stat (filename_stamp1,   &statinfo[0]);
+  do_stat (filename_testfile, &statinfo[1]);
+  do_stat (filename_stamp2,   &statinfo[2]);
+  do_stat (filename_stamp3,   &statinfo[3]);
+
+  /* Now use our access functions. */
+  for (i = 0; i < NFILES; ++i)
+    {
+      modtimes[i] = get_stat_mtime (&statinfo[i]);
+    }
+}
+
+static void
+test_mtime (const struct stat *statinfo, struct timespec *modtimes)
+{
+  int i;
+
+  /* Use the struct stat fields directly. */
+  /* mtime(stamp1) < mtime(stamp2) */
+  ASSERT (statinfo[0].st_mtime < statinfo[2].st_mtime
+          || (statinfo[0].st_mtime == statinfo[2].st_mtime
+              && (get_stat_mtime_ns (&statinfo[0])
+                  < get_stat_mtime_ns (&statinfo[2]))));
+  /* mtime(stamp2) < mtime(stamp3) */
+  ASSERT (statinfo[2].st_mtime < statinfo[3].st_mtime
+          || (statinfo[2].st_mtime == statinfo[3].st_mtime
+              && (get_stat_mtime_ns (&statinfo[2])
+                  < get_stat_mtime_ns (&statinfo[3]))));
+
+  /* Now check the result of the access functions. */
+  /* mtime(stamp1) < mtime(stamp2) */
+  ASSERT (modtimes[0].tv_sec < modtimes[2].tv_sec
+          || (modtimes[0].tv_sec == modtimes[2].tv_sec
+              && modtimes[0].tv_nsec < modtimes[2].tv_nsec));
+  /* mtime(stamp2) < mtime(stamp3) */
+  ASSERT (modtimes[2].tv_sec < modtimes[3].tv_sec
+          || (modtimes[2].tv_sec == modtimes[3].tv_sec
+              && modtimes[2].tv_nsec < modtimes[3].tv_nsec));
+
+  /* verify equivalence */
+  for (i = 0; i < NFILES; ++i)
+    {
+      struct timespec ts;
+      ts = get_stat_mtime (&statinfo[i]);
+      ASSERT (ts.tv_sec == statinfo[i].st_mtime);
+    }
+}
+
+#if defined _WIN32 && !defined __CYGWIN__
+/* Skip the ctime tests on native Windows platforms, because their
+   st_ctime is either the same as st_mtime (plus or minus an offset)
+   or set to the file _creation_ time, and is not influenced by rename
+   or chmod.  */
+# define test_ctime(ignored) ((void) 0)
+#else
+static void
+test_ctime (const struct stat *statinfo)
+{
+  /* On some buggy NFS clients, mtime and ctime are disproportionately
+     skewed from one another.  Skip this test in that case.  */
+  if (statinfo[0].st_mtime != statinfo[0].st_ctime)
+    return;
+
+  /* mtime(stamp2) < ctime(testfile) */
+  ASSERT (statinfo[2].st_mtime < statinfo[1].st_ctime
+          || (statinfo[2].st_mtime == statinfo[1].st_ctime
+              && (get_stat_mtime_ns (&statinfo[2])
+                  < get_stat_ctime_ns (&statinfo[1]))));
+}
+#endif
+
+static void
+test_birthtime (const struct stat *statinfo,
+                const struct timespec *modtimes,
+                struct timespec *birthtimes)
+{
+  int i;
+
+  /* Collect the birth times.  */
+  for (i = 0; i < NFILES; ++i)
+    {
+      birthtimes[i] = get_stat_birthtime (&statinfo[i]);
+      if (birthtimes[i].tv_nsec < 0)
+        return;
+    }
+
+  /* mtime(stamp1) < birthtime(testfile) */
+  ASSERT (modtimes[0].tv_sec < birthtimes[1].tv_sec
+          || (modtimes[0].tv_sec == birthtimes[1].tv_sec
+              && modtimes[0].tv_nsec < birthtimes[1].tv_nsec));
+  /* birthtime(testfile) < mtime(stamp2) */
+  ASSERT (birthtimes[1].tv_sec < modtimes[2].tv_sec
+          || (birthtimes[1].tv_sec == modtimes[2].tv_sec
+              && birthtimes[1].tv_nsec < modtimes[2].tv_nsec));
+}
+
+int
+main (void)
+{
+  struct stat statinfo[NFILES];
+  struct timespec modtimes[NFILES];
+  struct timespec birthtimes[NFILES];
+
+  initialize_filenames ();
+
+#ifdef SIGHUP
+  signal (SIGHUP, cleanup);
+#endif
+#ifdef SIGINT
+  signal (SIGINT, cleanup);
+#endif
+#ifdef SIGQUIT
+  signal (SIGQUIT, cleanup);
+#endif
+#ifdef SIGTERM
+  signal (SIGTERM, cleanup);
+#endif
+
+  cleanup (0);
+  prepare_test (statinfo, modtimes);
+  test_mtime (statinfo, modtimes);
+  test_ctime (statinfo);
+  test_birthtime (statinfo, modtimes, birthtimes);
+
+  cleanup (0);
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-stat.c b/src/grep/gnulib-tests/test-stat.c
new file mode 100644
index 0000000..6f0a995
--- /dev/null
+++ b/src/grep/gnulib-tests/test-stat.c
@@ -0,0 +1,56 @@
+/* Tests of stat.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <sys/stat.h>
+
+/* Caution: stat may be a function-like macro.  Although this
+   signature check must pass, it may be the signature of the real (and
+   broken) stat rather than rpl_stat.  Most code should not use the
+   address of stat.  */
+#include "signature.h"
+SIGNATURE_CHECK (stat, int, (char const *, struct stat *));
+
+#include <fcntl.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "same-inode.h"
+#include "macros.h"
+
+#define BASE "test-stat.t"
+
+#include "test-stat.h"
+
+/* Wrapper around stat, which works even if stat is a function-like
+   macro, where test_stat_func(stat) would do the wrong thing.  */
+static int
+do_stat (char const *name, struct stat *st)
+{
+  return stat (name, st);
+}
+
+int
+main (void)
+{
+  return test_stat_func (do_stat, true);
+}
diff --git a/src/grep/gnulib-tests/test-stat.h b/src/grep/gnulib-tests/test-stat.h
new file mode 100644
index 0000000..e728ca2
--- /dev/null
+++ b/src/grep/gnulib-tests/test-stat.h
@@ -0,0 +1,107 @@
+/* Tests of stat.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+/* This file is designed to test both stat(n,buf) and
+   fstatat(AT_FDCWD,n,buf,0).  FUNC is the function to test.  Assumes
+   that BASE and ASSERT are already defined, and that appropriate
+   headers are already included.  If PRINT, warn before skipping
+   symlink tests with status 77.  */
+
+static int
+test_stat_func (int (*func) (char const *, struct stat *), bool print)
+{
+  struct stat st1;
+  struct stat st2;
+  char *cwd = getcwd (NULL, 0);
+
+  ASSERT (cwd);
+  ASSERT (func (".", &st1) == 0);
+  ASSERT (func ("./", &st2) == 0);
+#if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
+  ASSERT (SAME_INODE (st1, st2));
+#endif
+  ASSERT (func (cwd, &st2) == 0);
+#if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
+  ASSERT (SAME_INODE (st1, st2));
+#endif
+  ASSERT (func ("/", &st1) == 0);
+  ASSERT (func ("///", &st2) == 0);
+#if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
+  ASSERT (SAME_INODE (st1, st2));
+#endif
+
+  errno = 0;
+  ASSERT (func ("", &st1) == -1);
+  ASSERT (errno == ENOENT);
+  errno = 0;
+  ASSERT (func ("nosuch", &st1) == -1);
+  ASSERT (errno == ENOENT);
+  errno = 0;
+  ASSERT (func ("nosuch/", &st1) == -1);
+  ASSERT (errno == ENOENT);
+
+  ASSERT (close (creat (BASE "file", 0600)) == 0);
+  ASSERT (func (BASE "file", &st1) == 0);
+  errno = 0;
+  ASSERT (func (BASE "file/", &st1) == -1);
+  ASSERT (errno == ENOTDIR);
+
+  /* Now for some symlink tests, where supported.  We set up:
+     link1 -> directory
+     link2 -> file
+     link3 -> dangling
+     link4 -> loop
+     then test behavior with trailing slash.
+  */
+  if (symlink (".", BASE "link1") != 0)
+    {
+      ASSERT (unlink (BASE "file") == 0);
+      if (print)
+        fputs ("skipping test: symlinks not supported on this file system\n",
+               stderr);
+      return 77;
+    }
+  ASSERT (symlink (BASE "file", BASE "link2") == 0);
+  ASSERT (symlink (BASE "nosuch", BASE "link3") == 0);
+  ASSERT (symlink (BASE "link4", BASE "link4") == 0);
+
+  ASSERT (func (BASE "link1/", &st1) == 0);
+  ASSERT (S_ISDIR (st1.st_mode));
+
+  errno = 0;
+  ASSERT (func (BASE "link2/", &st1) == -1);
+  ASSERT (errno == ENOTDIR);
+
+  errno = 0;
+  ASSERT (func (BASE "link3/", &st1) == -1);
+  ASSERT (errno == ENOENT);
+
+  errno = 0;
+  ASSERT (func (BASE "link4/", &st1) == -1);
+  ASSERT (errno == ELOOP);
+
+  /* Cleanup.  */
+  ASSERT (unlink (BASE "file") == 0);
+  ASSERT (unlink (BASE "link1") == 0);
+  ASSERT (unlink (BASE "link2") == 0);
+  ASSERT (unlink (BASE "link3") == 0);
+  ASSERT (unlink (BASE "link4") == 0);
+  free (cwd);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-stdalign.c b/src/grep/gnulib-tests/test-stdalign.c
new file mode 100644
index 0000000..38812b6
--- /dev/null
+++ b/src/grep/gnulib-tests/test-stdalign.c
@@ -0,0 +1,126 @@
+/* Test of <stdalign.h>.
+   Copyright 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert, inspired by Bruno Haible's test-alignof.c.  */
+
+#include <config.h>
+
+#include <stdalign.h>
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "verify.h"
+
+#include "macros.h"
+
+typedef long double longdouble;
+typedef struct { char a[1]; } struct1;
+typedef struct { char a[2]; } struct2;
+typedef struct { char a[3]; } struct3;
+typedef struct { char a[4]; } struct4;
+
+verify (__alignof_is_defined == 1);
+#ifndef alignof
+# error "alignof is not a macro"
+#endif
+
+#if __alignas_is_defined
+verify (__alignas_is_defined == 1);
+# ifndef alignas
+#  error "alignas is not a macro"
+# endif
+/* mingw can go up only to 8.  8 is all that GNU Emacs needs, so let's
+   limit the test to 8 for now.  */
+# define TEST_ALIGNMENT 8
+#else
+# define _Alignas(alignment)
+# define alignas(alignment)
+# define TEST_ALIGNMENT 1
+#endif
+
+#define CHECK_STATIC(type) \
+  typedef struct { char slot1; type slot2; } type##_helper; \
+  verify (alignof (type) == offsetof (type##_helper, slot2)); \
+  verify (_Alignof (type) == alignof (type)); \
+  const int type##_alignment = alignof (type); \
+  type alignas (TEST_ALIGNMENT) static_##type##_alignas; \
+  type _Alignas (TEST_ALIGNMENT) static_##type##_Alignas
+
+#define CHECK_ALIGNED(var) ASSERT ((uintptr_t) &(var) % TEST_ALIGNMENT == 0)
+
+CHECK_STATIC (char);
+CHECK_STATIC (short);
+CHECK_STATIC (int);
+CHECK_STATIC (long);
+#ifdef INT64_MAX
+CHECK_STATIC (int64_t);
+#endif
+CHECK_STATIC (float);
+CHECK_STATIC (double);
+/* CHECK_STATIC (longdouble); */
+CHECK_STATIC (struct1);
+CHECK_STATIC (struct2);
+CHECK_STATIC (struct3);
+CHECK_STATIC (struct4);
+
+int
+main ()
+{
+#if defined __SUNPRO_C && __SUNPRO_C < 0x5150
+  /* Avoid a test failure due to Sun Studio Developer Bug Report #2125432.  */
+  fputs ("Skipping test: known Sun C compiler bug\n", stderr);
+  return 77;
+#elif defined __HP_cc && __ia64
+  /* Avoid a test failure due to HP-UX Itanium cc bug; see:
+     https://lists.gnu.org/r/bug-gnulib/2017-03/msg00078.html  */
+  fputs ("Skipping test: known HP-UX Itanium cc compiler bug\n", stderr);
+  return 77;
+#elif defined __clang__ && defined __ibmxl__
+  /* Avoid a test failure with IBM xlc 16.1.  It ignores alignas (8),
+     _Alignas (8), and __attribute__ ((__aligned__ (8))).  */
+  fputs ("Skipping test: known AIX XL C compiler deficiency\n", stderr);
+  return 77;
+#else
+  CHECK_ALIGNED (static_char_alignas);
+  CHECK_ALIGNED (static_char_Alignas);
+  CHECK_ALIGNED (static_short_alignas);
+  CHECK_ALIGNED (static_short_Alignas);
+  CHECK_ALIGNED (static_int_alignas);
+  CHECK_ALIGNED (static_int_Alignas);
+  CHECK_ALIGNED (static_long_alignas);
+  CHECK_ALIGNED (static_long_Alignas);
+# ifdef INT64_MAX
+  CHECK_ALIGNED (static_int64_t_alignas);
+  CHECK_ALIGNED (static_int64_t_Alignas);
+# endif
+  CHECK_ALIGNED (static_float_alignas);
+  CHECK_ALIGNED (static_float_Alignas);
+  CHECK_ALIGNED (static_double_alignas);
+  CHECK_ALIGNED (static_double_Alignas);
+  /* CHECK_ALIGNED (static_longdouble_alignas); */
+  /* CHECK_ALIGNED (static_longdouble_Alignas); */
+  CHECK_ALIGNED (static_struct1_alignas);
+  CHECK_ALIGNED (static_struct1_Alignas);
+  CHECK_ALIGNED (static_struct2_alignas);
+  CHECK_ALIGNED (static_struct2_Alignas);
+  CHECK_ALIGNED (static_struct3_alignas);
+  CHECK_ALIGNED (static_struct3_Alignas);
+  CHECK_ALIGNED (static_struct4_alignas);
+  CHECK_ALIGNED (static_struct4_Alignas);
+  return 0;
+#endif
+}
diff --git a/src/grep/gnulib-tests/test-stdbool.c b/src/grep/gnulib-tests/test-stdbool.c
new file mode 100644
index 0000000..60e5242
--- /dev/null
+++ b/src/grep/gnulib-tests/test-stdbool.c
@@ -0,0 +1,122 @@
+/* Test of <stdbool.h> substitute.
+   Copyright (C) 2002-2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+/* Define ADDRESS_CHECK_OKAY if it is OK to assign an address to a 'bool'
+   and this does not generate a warning (because we want this test to succeed
+   even when using gcc's -Werror).  */
+#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) \
+    || (__clang_major__ >= 4)
+/* We can silence the warning.  */
+# pragma GCC diagnostic ignored "-Waddress"
+# define ADDRESS_CHECK_OKAY
+#elif defined __GNUC__ || defined __clang__
+/* There may be a warning.  */
+#else
+/* Ignore warnings from other compilers.  */
+# define ADDRESS_CHECK_OKAY
+#endif
+
+#include <config.h>
+
+#include <stdbool.h>
+
+#ifndef bool
+ "error: bool is not defined"
+#endif
+#ifndef false
+ "error: false is not defined"
+#endif
+#if false
+ "error: false is not 0"
+#endif
+#ifndef true
+ "error: true is not defined"
+#endif
+#if true != 1
+ "error: true is not 1"
+#endif
+#ifndef __bool_true_false_are_defined
+ "error: __bool_true_false_are_defined is not defined"
+#endif
+
+/* Several tests cannot be guaranteed with gnulib's <stdbool.h>, at
+   least, not for all compilers and compiler options.  */
+#if HAVE_STDBOOL_H || 3 <= __GNUC__ || 4 <= __clang_major__
+struct s { _Bool s: 1; _Bool t; } s;
+#endif
+
+char a[true == 1 ? 1 : -1];
+char b[false == 0 ? 1 : -1];
+char c[__bool_true_false_are_defined == 1 ? 1 : -1];
+#if HAVE_STDBOOL_H || 3 <= __GNUC__ || 4 <= __clang_major__ /* See above.  */
+char d[(bool) 0.5 == true ? 1 : -1];
+# ifdef ADDRESS_CHECK_OKAY /* Avoid gcc warning.  */
+/* C99 may plausibly be interpreted as not requiring support for a cast from
+   a variable's address to bool in a static initializer.  So treat it like a
+   GCC extension.  */
+#  if defined __GNUC__ || defined __clang__
+bool e = &s;
+#  endif
+# endif
+char f[(_Bool) 0.0 == false ? 1 : -1];
+#endif
+char g[true];
+char h[sizeof (_Bool)];
+#if HAVE_STDBOOL_H || 3 <= __GNUC__ || 4 <= __clang_major__ /* See above.  */
+char i[sizeof s.t];
+#endif
+enum { j = false, k = true, l = false * true, m = true * 256 };
+_Bool n[m];
+char o[sizeof n == m * sizeof n[0] ? 1 : -1];
+char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1];
+/* Catch a bug in an HP-UX C compiler.  See
+   https://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
+   https://lists.gnu.org/r/bug-coreutils/2005-11/msg00161.html
+ */
+_Bool q = true;
+_Bool *pq = &q;
+
+int
+main ()
+{
+  int error = 0;
+
+#if HAVE_STDBOOL_H || 3 <= __GNUC_ || 4 <= __clang_major___ /* See above.  */
+# ifdef ADDRESS_CHECK_OKAY /* Avoid gcc warning.  */
+  /* A cast from a variable's address to bool is valid in expressions.  */
+  {
+    bool e1 = &s;
+    if (!e1)
+      error = 1;
+  }
+# endif
+#endif
+
+  /* Catch a bug in IBM AIX xlc compiler version 6.0.0.0
+     reported by James Lemley on 2005-10-05; see
+     https://lists.gnu.org/r/bug-coreutils/2005-10/msg00086.html
+     This is a runtime test, since a corresponding compile-time
+     test would rely on initializer extensions.  */
+  {
+    char digs[] = "0123456789";
+    if (&(digs + 5)[-2 + (bool) 1] != &digs[4])
+      error = 1;
+  }
+
+  return error;
+}
diff --git a/src/grep/gnulib-tests/test-stddef.c b/src/grep/gnulib-tests/test-stddef.c
new file mode 100644
index 0000000..21b46b9
--- /dev/null
+++ b/src/grep/gnulib-tests/test-stddef.c
@@ -0,0 +1,77 @@
+/* Test of <stddef.h> substitute.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <stddef.h>
+#include <limits.h>
+#include <stdalign.h>
+#include "verify.h"
+
+/* Check that appropriate types are defined.  */
+wchar_t a = 'c';
+ptrdiff_t b = 1;
+size_t c = 2;
+max_align_t x;
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
+/* Check that offsetof produces integer constants with correct type.  */
+struct d
+{
+  char e;
+  char f;
+};
+/* Solaris 10 has a bug where offsetof is under-parenthesized, and
+   cannot be used as an arbitrary expression.  However, since it is
+   unlikely to bite real code, we ignore that short-coming.  */
+/* verify (sizeof offsetof (struct d, e) == sizeof (size_t)); */
+verify (sizeof (offsetof (struct d, e)) == sizeof (size_t));
+verify (offsetof (struct d, f) == 1);
+
+/* offsetof promotes to an unsigned integer if and only if sizes do
+   not fit in int.  */
+verify ((offsetof (struct d, e) < -1) == (INT_MAX < (size_t) -1));
+
+/* Check max_align_t's alignment.  */
+verify (alignof (double) <= alignof (max_align_t));
+verify (alignof (int) <= alignof (max_align_t));
+verify (alignof (long double) <= alignof (max_align_t));
+verify (alignof (long int) <= alignof (max_align_t));
+verify (alignof (ptrdiff_t) <= alignof (max_align_t));
+verify (alignof (size_t) <= alignof (max_align_t));
+verify (alignof (wchar_t) <= alignof (max_align_t));
+verify (alignof (struct d) <= alignof (max_align_t));
+#if defined __GNUC__ || defined __clang__ || defined __IBM__ALIGNOF__
+verify (__alignof__ (double) <= __alignof__ (max_align_t));
+verify (__alignof__ (int) <= __alignof__ (max_align_t));
+verify (__alignof__ (long double) <= __alignof__ (max_align_t));
+verify (__alignof__ (long int) <= __alignof__ (max_align_t));
+verify (__alignof__ (ptrdiff_t) <= __alignof__ (max_align_t));
+verify (__alignof__ (size_t) <= __alignof__ (max_align_t));
+verify (__alignof__ (wchar_t) <= __alignof__ (max_align_t));
+verify (__alignof__ (struct d) <= __alignof__ (max_align_t));
+#endif
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-stdint.c b/src/grep/gnulib-tests/test-stdint.c
new file mode 100644
index 0000000..dc6fad7
--- /dev/null
+++ b/src/grep/gnulib-tests/test-stdint.c
@@ -0,0 +1,428 @@
+/* Test of <stdint.h> substitute.
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2006.  */
+
+#include <config.h>
+
+/* Whether to enable pedantic checks. */
+#define DO_PEDANTIC 0
+
+#include <stdint.h>
+
+#include "verify.h"
+#include "intprops.h"
+
+#if ((__GNUC__ >= 2) || (__clang_major__ >= 4)) && DO_PEDANTIC
+# define verify_same_types(expr1,expr2)  \
+    extern void _verify_func(__LINE__) (__typeof__ (expr1) *); \
+    extern void _verify_func(__LINE__) (__typeof__ (expr2) *);
+# define _verify_func(line) _verify_func2(line)
+# define _verify_func2(line) verify_func_ ## line
+#else
+# define verify_same_types(expr1,expr2) extern void verify_func (int)
+#endif
+
+/* 7.18.1.1. Exact-width integer types */
+/* 7.18.2.1. Limits of exact-width integer types */
+
+int8_t a1[3] = { INT8_C (17), INT8_MIN, INT8_MAX };
+verify (TYPE_MINIMUM (int8_t) == INT8_MIN);
+verify (TYPE_MAXIMUM (int8_t) == INT8_MAX);
+verify_same_types (INT8_MIN, (int8_t) 0 + 0);
+verify_same_types (INT8_MAX, (int8_t) 0 + 0);
+
+int16_t a2[3] = { INT16_C (17), INT16_MIN, INT16_MAX };
+verify (TYPE_MINIMUM (int16_t) == INT16_MIN);
+verify (TYPE_MAXIMUM (int16_t) == INT16_MAX);
+verify_same_types (INT16_MIN, (int16_t) 0 + 0);
+verify_same_types (INT16_MAX, (int16_t) 0 + 0);
+
+int32_t a3[3] = { INT32_C (17), INT32_MIN, INT32_MAX };
+verify (TYPE_MINIMUM (int32_t) == INT32_MIN);
+verify (TYPE_MAXIMUM (int32_t) == INT32_MAX);
+verify_same_types (INT32_MIN, (int32_t) 0 + 0);
+verify_same_types (INT32_MAX, (int32_t) 0 + 0);
+
+#ifdef INT64_MAX
+int64_t a4[3] = { INT64_C (17), INT64_MIN, INT64_MAX };
+verify (TYPE_MINIMUM (int64_t) == INT64_MIN);
+verify (TYPE_MAXIMUM (int64_t) == INT64_MAX);
+verify_same_types (INT64_MIN, (int64_t) 0 + 0);
+verify_same_types (INT64_MAX, (int64_t) 0 + 0);
+#endif
+
+uint8_t b1[2] = { UINT8_C (17), UINT8_MAX };
+verify (TYPE_MAXIMUM (uint8_t) == UINT8_MAX);
+verify_same_types (UINT8_MAX, (uint8_t) 0 + 0);
+
+uint16_t b2[2] = { UINT16_C (17), UINT16_MAX };
+verify (TYPE_MAXIMUM (uint16_t) == UINT16_MAX);
+verify_same_types (UINT16_MAX, (uint16_t) 0 + 0);
+
+uint32_t b3[2] = { UINT32_C (17), UINT32_MAX };
+verify (TYPE_MAXIMUM (uint32_t) == UINT32_MAX);
+verify_same_types (UINT32_MAX, (uint32_t) 0 + 0);
+
+#ifdef UINT64_MAX
+uint64_t b4[2] = { UINT64_C (17), UINT64_MAX };
+verify (TYPE_MAXIMUM (uint64_t) == UINT64_MAX);
+verify_same_types (UINT64_MAX, (uint64_t) 0 + 0);
+#endif
+
+#if INT8_MIN && INT8_MAX && INT16_MIN && INT16_MAX && INT32_MIN && INT32_MAX
+/* ok */
+#else
+err or;
+#endif
+
+#if UINT8_MAX && UINT16_MAX && UINT32_MAX
+/* ok */
+#else
+err or;
+#endif
+
+/* 7.18.1.2. Minimum-width integer types */
+/* 7.18.2.2. Limits of minimum-width integer types */
+
+int_least8_t c1[3] = { 17, INT_LEAST8_MIN, INT_LEAST8_MAX };
+verify (TYPE_MINIMUM (int_least8_t) == INT_LEAST8_MIN);
+verify (TYPE_MAXIMUM (int_least8_t) == INT_LEAST8_MAX);
+verify_same_types (INT_LEAST8_MIN, (int_least8_t) 0 + 0);
+verify_same_types (INT_LEAST8_MAX, (int_least8_t) 0 + 0);
+
+int_least16_t c2[3] = { 17, INT_LEAST16_MIN, INT_LEAST16_MAX };
+verify (TYPE_MINIMUM (int_least16_t) == INT_LEAST16_MIN);
+verify (TYPE_MAXIMUM (int_least16_t) == INT_LEAST16_MAX);
+verify_same_types (INT_LEAST16_MIN, (int_least16_t) 0 + 0);
+verify_same_types (INT_LEAST16_MAX, (int_least16_t) 0 + 0);
+
+int_least32_t c3[3] = { 17, INT_LEAST32_MIN, INT_LEAST32_MAX };
+verify (TYPE_MINIMUM (int_least32_t) == INT_LEAST32_MIN);
+verify (TYPE_MAXIMUM (int_least32_t) == INT_LEAST32_MAX);
+verify_same_types (INT_LEAST32_MIN, (int_least32_t) 0 + 0);
+verify_same_types (INT_LEAST32_MAX, (int_least32_t) 0 + 0);
+
+#ifdef INT_LEAST64_MAX
+int_least64_t c4[3] = { 17, INT_LEAST64_MIN, INT_LEAST64_MAX };
+verify (TYPE_MINIMUM (int_least64_t) == INT_LEAST64_MIN);
+verify (TYPE_MAXIMUM (int_least64_t) == INT_LEAST64_MAX);
+verify_same_types (INT_LEAST64_MIN, (int_least64_t) 0 + 0);
+verify_same_types (INT_LEAST64_MAX, (int_least64_t) 0 + 0);
+#endif
+
+uint_least8_t d1[2] = { 17, UINT_LEAST8_MAX };
+verify (TYPE_MAXIMUM (uint_least8_t) == UINT_LEAST8_MAX);
+verify_same_types (UINT_LEAST8_MAX, (uint_least8_t) 0 + 0);
+
+uint_least16_t d2[2] = { 17, UINT_LEAST16_MAX };
+verify (TYPE_MAXIMUM (uint_least16_t) == UINT_LEAST16_MAX);
+verify_same_types (UINT_LEAST16_MAX, (uint_least16_t) 0 + 0);
+
+uint_least32_t d3[2] = { 17, UINT_LEAST32_MAX };
+verify (TYPE_MAXIMUM (uint_least32_t) == UINT_LEAST32_MAX);
+verify_same_types (UINT_LEAST32_MAX, (uint_least32_t) 0 + 0);
+
+#ifdef UINT_LEAST64_MAX
+uint_least64_t d4[2] = { 17, UINT_LEAST64_MAX };
+verify (TYPE_MAXIMUM (uint_least64_t) == UINT_LEAST64_MAX);
+verify_same_types (UINT_LEAST64_MAX, (uint_least64_t) 0 + 0);
+#endif
+
+#if INT_LEAST8_MIN && INT_LEAST8_MAX && INT_LEAST16_MIN && INT_LEAST16_MAX && INT_LEAST32_MIN && INT_LEAST32_MAX
+/* ok */
+#else
+err or;
+#endif
+
+#if UINT_LEAST8_MAX && UINT_LEAST16_MAX && UINT_LEAST32_MAX
+/* ok */
+#else
+err or;
+#endif
+
+/* 7.18.1.3. Fastest minimum-width integer types */
+/* 7.18.2.3. Limits of fastest minimum-width integer types */
+
+int_fast8_t e1[3] = { 17, INT_FAST8_MIN, INT_FAST8_MAX };
+verify (TYPE_MINIMUM (int_fast8_t) == INT_FAST8_MIN);
+verify (TYPE_MAXIMUM (int_fast8_t) == INT_FAST8_MAX);
+verify_same_types (INT_FAST8_MIN, (int_fast8_t) 0 + 0);
+verify_same_types (INT_FAST8_MAX, (int_fast8_t) 0 + 0);
+
+int_fast16_t e2[3] = { 17, INT_FAST16_MIN, INT_FAST16_MAX };
+verify (TYPE_MINIMUM (int_fast16_t) == INT_FAST16_MIN);
+verify (TYPE_MAXIMUM (int_fast16_t) == INT_FAST16_MAX);
+verify_same_types (INT_FAST16_MIN, (int_fast16_t) 0 + 0);
+verify_same_types (INT_FAST16_MAX, (int_fast16_t) 0 + 0);
+
+int_fast32_t e3[3] = { 17, INT_FAST32_MIN, INT_FAST32_MAX };
+verify (TYPE_MINIMUM (int_fast32_t) == INT_FAST32_MIN);
+verify (TYPE_MAXIMUM (int_fast32_t) == INT_FAST32_MAX);
+verify_same_types (INT_FAST32_MIN, (int_fast32_t) 0 + 0);
+verify_same_types (INT_FAST32_MAX, (int_fast32_t) 0 + 0);
+
+#ifdef INT_FAST64_MAX
+int_fast64_t e4[3] = { 17, INT_FAST64_MIN, INT_FAST64_MAX };
+verify (TYPE_MINIMUM (int_fast64_t) == INT_FAST64_MIN);
+verify (TYPE_MAXIMUM (int_fast64_t) == INT_FAST64_MAX);
+verify_same_types (INT_FAST64_MIN, (int_fast64_t) 0 + 0);
+verify_same_types (INT_FAST64_MAX, (int_fast64_t) 0 + 0);
+#endif
+
+uint_fast8_t f1[2] = { 17, UINT_FAST8_MAX };
+verify (TYPE_MAXIMUM (uint_fast8_t) == UINT_FAST8_MAX);
+verify_same_types (UINT_FAST8_MAX, (uint_fast8_t) 0 + 0);
+
+uint_fast16_t f2[2] = { 17, UINT_FAST16_MAX };
+verify (TYPE_MAXIMUM (uint_fast16_t) == UINT_FAST16_MAX);
+verify_same_types (UINT_FAST16_MAX, (uint_fast16_t) 0 + 0);
+
+uint_fast32_t f3[2] = { 17, UINT_FAST32_MAX };
+verify (TYPE_MAXIMUM (uint_fast32_t) == UINT_FAST32_MAX);
+verify_same_types (UINT_FAST32_MAX, (uint_fast32_t) 0 + 0);
+
+#ifdef UINT_FAST64_MAX
+uint_fast64_t f4[2] = { 17, UINT_FAST64_MAX };
+verify (TYPE_MAXIMUM (uint_fast64_t) == UINT_FAST64_MAX);
+verify_same_types (UINT_FAST64_MAX, (uint_fast64_t) 0 + 0);
+#endif
+
+#if INT_FAST8_MIN && INT_FAST8_MAX && INT_FAST16_MIN && INT_FAST16_MAX && INT_FAST32_MIN && INT_FAST32_MAX
+/* ok */
+#else
+err or;
+#endif
+
+#if UINT_FAST8_MAX && UINT_FAST16_MAX && UINT_FAST32_MAX
+/* ok */
+#else
+err or;
+#endif
+
+/* 7.18.1.4. Integer types capable of holding object pointers */
+/* 7.18.2.4. Limits of integer types capable of holding object pointers */
+
+intptr_t g[3] = { 17, INTPTR_MIN, INTPTR_MAX };
+verify (sizeof (void *) <= sizeof (intptr_t));
+verify (TYPE_MINIMUM (intptr_t) == INTPTR_MIN);
+verify (TYPE_MAXIMUM (intptr_t) == INTPTR_MAX);
+verify_same_types (INTPTR_MIN, (intptr_t) 0 + 0);
+verify_same_types (INTPTR_MAX, (intptr_t) 0 + 0);
+
+uintptr_t h[2] = { 17, UINTPTR_MAX };
+verify (sizeof (void *) <= sizeof (uintptr_t));
+verify (TYPE_MAXIMUM (uintptr_t) == UINTPTR_MAX);
+verify_same_types (UINTPTR_MAX, (uintptr_t) 0 + 0);
+
+#if INTPTR_MIN && INTPTR_MAX && UINTPTR_MAX
+/* ok */
+#else
+err or;
+#endif
+
+/* 7.18.1.5. Greatest-width integer types */
+/* 7.18.2.5. Limits of greatest-width integer types */
+
+intmax_t i[3] = { INTMAX_C (17), INTMAX_MIN, INTMAX_MAX };
+verify (TYPE_MINIMUM (intmax_t) == INTMAX_MIN);
+verify (TYPE_MAXIMUM (intmax_t) == INTMAX_MAX);
+verify_same_types (INTMAX_MIN, (intmax_t) 0 + 0);
+verify_same_types (INTMAX_MAX, (intmax_t) 0 + 0);
+
+uintmax_t j[2] = { UINTMAX_C (17), UINTMAX_MAX };
+verify (TYPE_MAXIMUM (uintmax_t) == UINTMAX_MAX);
+verify_same_types (UINTMAX_MAX, (uintmax_t) 0 + 0);
+
+/* As of 2007, Sun C and HP-UX 10.20 cc don't support 'long long' constants in
+   the preprocessor.  */
+#if !(defined __SUNPRO_C || (defined __hpux && !defined __GNUC__))
+#if INTMAX_MIN && INTMAX_MAX && UINTMAX_MAX
+/* ok */
+#else
+err or;
+#endif
+#endif
+
+/* 7.18.3. Limits of other integer types */
+
+#include <stddef.h>
+
+verify (TYPE_MINIMUM (ptrdiff_t) == PTRDIFF_MIN);
+verify (TYPE_MAXIMUM (ptrdiff_t) == PTRDIFF_MAX);
+verify_same_types (PTRDIFF_MIN, (ptrdiff_t) 0 + 0);
+verify_same_types (PTRDIFF_MAX, (ptrdiff_t) 0 + 0);
+
+#if PTRDIFF_MIN && PTRDIFF_MAX
+/* ok */
+#else
+err or;
+#endif
+
+#include <signal.h>
+
+verify (TYPE_MINIMUM (sig_atomic_t) == SIG_ATOMIC_MIN);
+verify (TYPE_MAXIMUM (sig_atomic_t) == SIG_ATOMIC_MAX);
+verify_same_types (SIG_ATOMIC_MIN, (sig_atomic_t) 0 + 0);
+verify_same_types (SIG_ATOMIC_MAX, (sig_atomic_t) 0 + 0);
+
+#if SIG_ATOMIC_MIN != 17 && SIG_ATOMIC_MAX
+/* ok */
+#else
+err or;
+#endif
+
+verify (TYPE_MAXIMUM (size_t) == SIZE_MAX);
+verify_same_types (SIZE_MAX, (size_t) 0 + 0);
+
+#if SIZE_MAX
+/* ok */
+#else
+err or;
+#endif
+
+#if HAVE_WCHAR_T
+verify (TYPE_MINIMUM (wchar_t) == WCHAR_MIN);
+verify (TYPE_MAXIMUM (wchar_t) == WCHAR_MAX);
+verify_same_types (WCHAR_MIN, (wchar_t) 0 + 0);
+verify_same_types (WCHAR_MAX, (wchar_t) 0 + 0);
+
+# if WCHAR_MIN != 17 && WCHAR_MAX
+/* ok */
+# else
+err or;
+# endif
+#endif
+
+#if HAVE_WINT_T
+# include <wchar.h>
+
+verify (TYPE_MINIMUM (wint_t) == WINT_MIN);
+verify (TYPE_MAXIMUM (wint_t) == WINT_MAX);
+verify_same_types (WINT_MIN, (wint_t) 0 + 0);
+verify_same_types (WINT_MAX, (wint_t) 0 + 0);
+
+# if WINT_MIN != 17 && WINT_MAX
+/* ok */
+# else
+err or;
+# endif
+#endif
+
+/* 7.18.4. Macros for integer constants */
+
+verify (INT8_C (17) == 17);
+verify_same_types (INT8_C (17), (int_least8_t)0 + 0);
+verify (UINT8_C (17) == 17);
+verify_same_types (UINT8_C (17), (uint_least8_t)0 + 0);
+
+verify (INT16_C (17) == 17);
+verify_same_types (INT16_C (17), (int_least16_t)0 + 0);
+verify (UINT16_C (17) == 17);
+verify_same_types (UINT16_C (17), (uint_least16_t)0 + 0);
+
+verify (INT32_C (17) == 17);
+verify_same_types (INT32_C (17), (int_least32_t)0 + 0);
+verify (UINT32_C (17) == 17);
+verify_same_types (UINT32_C (17), (uint_least32_t)0 + 0);
+
+#ifdef INT64_C
+verify (INT64_C (17) == 17);
+verify_same_types (INT64_C (17), (int_least64_t)0 + 0);
+#endif
+#ifdef UINT64_C
+verify (UINT64_C (17) == 17);
+verify_same_types (UINT64_C (17), (uint_least64_t)0 + 0);
+#endif
+
+verify (INTMAX_C (17) == 17);
+verify_same_types (INTMAX_C (17), (intmax_t)0 + 0);
+verify (UINTMAX_C (17) == 17);
+verify_same_types (UINTMAX_C (17), (uintmax_t)0 + 0);
+
+/* Use _GL_VERIFY (with a fixed-length diagnostic string) rather than verify,
+   because the latter would require forming each stringified expression, and
+   many of these would be so long as to trigger a warning/error like this:
+
+   test-stdint.c:407:1: error: string length '6980' is greater than the \
+     length '4095' ISO C99 compilers are required to support \
+     [-Werror=overlength-strings]
+  */
+#define verify_width(width, min, max) \
+  _GL_VERIFY ((max) >> ((width) - 1 - ((min) < 0)) == 1, \
+              "verify_width check", -)
+
+/* Macros specified by ISO/IEC TS 18661-1:2014.  */
+
+#ifdef INT8_MAX
+verify_width (INT8_WIDTH, INT8_MIN, INT8_MAX);
+#endif
+#ifdef UINT8_MAX
+verify_width (UINT8_WIDTH, 0, UINT8_MAX);
+#endif
+#ifdef INT16_MAX
+verify_width (INT16_WIDTH, INT16_MIN, INT16_MAX);
+#endif
+#ifdef UINT16_MAX
+verify_width (UINT16_WIDTH, 0, UINT16_MAX);
+#endif
+#ifdef INT32_MAX
+verify_width (INT32_WIDTH, INT32_MIN, INT32_MAX);
+#endif
+#ifdef UINT32_MAX
+verify_width (UINT32_WIDTH, 0, UINT32_MAX);
+#endif
+#ifdef INT64_MAX
+verify_width (INT64_WIDTH, INT64_MIN, INT64_MAX);
+#endif
+#ifdef UINT64_MAX
+verify_width (UINT64_WIDTH, 0, UINT64_MAX);
+#endif
+verify_width (INT_LEAST8_WIDTH, INT_LEAST8_MIN, INT_LEAST8_MAX);
+verify_width (UINT_LEAST8_WIDTH, 0, UINT_LEAST8_MAX);
+verify_width (INT_LEAST16_WIDTH, INT_LEAST16_MIN, INT_LEAST16_MAX);
+verify_width (UINT_LEAST16_WIDTH, 0, UINT_LEAST16_MAX);
+verify_width (INT_LEAST32_WIDTH, INT_LEAST32_MIN, INT_LEAST32_MAX);
+verify_width (UINT_LEAST32_WIDTH, 0, UINT_LEAST32_MAX);
+verify_width (INT_LEAST64_WIDTH, INT_LEAST64_MIN, INT_LEAST64_MAX);
+verify_width (UINT_LEAST64_WIDTH, 0, UINT_LEAST64_MAX);
+verify_width (INT_FAST8_WIDTH, INT_FAST8_MIN, INT_FAST8_MAX);
+verify_width (UINT_FAST8_WIDTH, 0, UINT_FAST8_MAX);
+verify_width (INT_FAST16_WIDTH, INT_FAST16_MIN, INT_FAST16_MAX);
+verify_width (UINT_FAST16_WIDTH, 0, UINT_FAST16_MAX);
+verify_width (INT_FAST32_WIDTH, INT_FAST32_MIN, INT_FAST32_MAX);
+verify_width (UINT_FAST32_WIDTH, 0, UINT_FAST32_MAX);
+verify_width (INT_FAST64_WIDTH, INT_FAST64_MIN, INT_FAST64_MAX);
+verify_width (UINT_FAST64_WIDTH, 0, UINT_FAST64_MAX);
+verify_width (INTPTR_WIDTH, INTPTR_MIN, INTPTR_MAX);
+verify_width (UINTPTR_WIDTH, 0, UINTPTR_MAX);
+verify_width (INTMAX_WIDTH, INTMAX_MIN, INTMAX_MAX);
+verify_width (UINTMAX_WIDTH, 0, UINTMAX_MAX);
+verify_width (PTRDIFF_WIDTH, PTRDIFF_MIN, PTRDIFF_MAX);
+verify_width (SIZE_WIDTH, 0, SIZE_MAX);
+verify_width (WCHAR_WIDTH, WCHAR_MIN, WCHAR_MAX);
+#ifdef WINT_MAX
+verify_width (WINT_WIDTH, WINT_MIN, WINT_MAX);
+#endif
+#ifdef SIG_ATOMIC_MAX
+verify_width (SIG_ATOMIC_WIDTH, SIG_ATOMIC_MIN, SIG_ATOMIC_MAX);
+#endif
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-stdio.c b/src/grep/gnulib-tests/test-stdio.c
new file mode 100644
index 0000000..8fd000a
--- /dev/null
+++ b/src/grep/gnulib-tests/test-stdio.c
@@ -0,0 +1,43 @@
+/* Test of <stdio.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "verify.h"
+
+/* Check that the various SEEK_* macros are defined.  */
+int sk[] = { SEEK_CUR, SEEK_END, SEEK_SET };
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
+/* Check that the types are all defined.  */
+fpos_t t1;
+off_t t2;
+size_t t3;
+ssize_t t4;
+va_list t5;
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-stdlib.c b/src/grep/gnulib-tests/test-stdlib.c
new file mode 100644
index 0000000..427263e
--- /dev/null
+++ b/src/grep/gnulib-tests/test-stdlib.c
@@ -0,0 +1,54 @@
+/* Test of <stdlib.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <stdlib.h>
+
+#include "verify.h"
+
+/* Check that EXIT_SUCCESS is 0, per POSIX.  */
+static int exitcode = EXIT_SUCCESS;
+#if EXIT_SUCCESS
+"oops"
+#endif
+
+/* Check for GNU value (not guaranteed by POSIX, but is guaranteed by
+   gnulib).  */
+#if EXIT_FAILURE != 1
+"oops"
+#endif
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
+#if GNULIB_TEST_SYSTEM_POSIX
+# include "test-sys_wait.h"
+#else
+# define test_sys_wait_macros() 0
+#endif
+
+int
+main (void)
+{
+  if (test_sys_wait_macros ())
+    return 1;
+
+  return exitcode;
+}
diff --git a/src/grep/gnulib-tests/test-strerror.c b/src/grep/gnulib-tests/test-strerror.c
new file mode 100644
index 0000000..2e4125b
--- /dev/null
+++ b/src/grep/gnulib-tests/test-strerror.c
@@ -0,0 +1,75 @@
+/* Test of strerror() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2007.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (strerror, char *, (int));
+
+#include <errno.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  char *str;
+
+  errno = 0;
+  str = strerror (EACCES);
+  ASSERT (str);
+  ASSERT (*str);
+  ASSERT (errno == 0);
+
+  errno = 0;
+  str = strerror (ETIMEDOUT);
+  ASSERT (str);
+  ASSERT (*str);
+  ASSERT (errno == 0);
+
+  errno = 0;
+  str = strerror (EOVERFLOW);
+  ASSERT (str);
+  ASSERT (*str);
+  ASSERT (errno == 0);
+
+  /* POSIX requires strerror (0) to succeed.  Reject use of "Unknown
+     error", but allow "Success", "No error", or even Solaris' "Error
+     0" which are distinct patterns from true out-of-range strings.
+     http://austingroupbugs.net/view.php?id=382  */
+  errno = 0;
+  str = strerror (0);
+  ASSERT (str);
+  ASSERT (*str);
+  ASSERT (errno == 0);
+  ASSERT (strstr (str, "nknown") == NULL);
+  ASSERT (strstr (str, "ndefined") == NULL);
+
+  /* POSIX requires strerror to produce a non-NULL result for all
+     inputs; as an extension, we also guarantee a non-empty result.
+     Reporting EINVAL is optional.  */
+  errno = 0;
+  str = strerror (-3);
+  ASSERT (str);
+  ASSERT (*str);
+  ASSERT (errno == 0 || errno == EINVAL);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-strerror_r.c b/src/grep/gnulib-tests/test-strerror_r.c
new file mode 100644
index 0000000..6e72194
--- /dev/null
+++ b/src/grep/gnulib-tests/test-strerror_r.c
@@ -0,0 +1,178 @@
+/* Test of strerror_r() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (strerror_r, int, (int, char *, size_t));
+
+#include <errno.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  char buf[100];
+  int ret;
+
+  /* Test results with valid errnum and enough room.  */
+
+  errno = 0;
+  buf[0] = '\0';
+  ASSERT (strerror_r (EACCES, buf, sizeof buf) == 0);
+  ASSERT (buf[0] != '\0');
+  ASSERT (errno == 0);
+  ASSERT (strlen (buf) < sizeof buf);
+
+  errno = 0;
+  buf[0] = '\0';
+  ASSERT (strerror_r (ETIMEDOUT, buf, sizeof buf) == 0);
+  ASSERT (buf[0] != '\0');
+  ASSERT (errno == 0);
+  ASSERT (strlen (buf) < sizeof buf);
+
+  errno = 0;
+  buf[0] = '\0';
+  ASSERT (strerror_r (EOVERFLOW, buf, sizeof buf) == 0);
+  ASSERT (buf[0] != '\0');
+  ASSERT (errno == 0);
+  ASSERT (strlen (buf) < sizeof buf);
+
+  /* POSIX requires strerror (0) to succeed.  Reject use of "Unknown
+     error", but allow "Success", "No error", or even Solaris' "Error
+     0" which are distinct patterns from true out-of-range strings.
+     http://austingroupbugs.net/view.php?id=382  */
+  errno = 0;
+  buf[0] = '\0';
+  ret = strerror_r (0, buf, sizeof buf);
+  ASSERT (ret == 0);
+  ASSERT (buf[0]);
+  ASSERT (errno == 0);
+  ASSERT (strstr (buf, "nknown") == NULL);
+  ASSERT (strstr (buf, "ndefined") == NULL);
+
+  /* Test results with out-of-range errnum and enough room.  POSIX
+     allows an empty string on success, and allows an unchanged buf on
+     error, but these are not useful, so we guarantee contents.  */
+  errno = 0;
+  buf[0] = '^';
+  ret = strerror_r (-3, buf, sizeof buf);
+  ASSERT (ret == 0 || ret == EINVAL);
+  ASSERT (buf[0] != '^');
+  ASSERT (*buf);
+  ASSERT (errno == 0);
+  ASSERT (strlen (buf) < sizeof buf);
+
+  /* Test results with a too small buffer.  POSIX requires an error;
+     only ERANGE for 0 and valid errors, and a choice of ERANGE or
+     EINVAL for out-of-range values.  On error, POSIX permits buf to
+     be empty, unchanged, or unterminated, but these are not useful,
+     so we guarantee NUL-terminated truncated contents for all but
+     size 0.  http://austingroupbugs.net/view.php?id=398.  Also ensure
+     that no out-of-bounds writes occur.  */
+  {
+    int errs[] = { EACCES, 0, -3, };
+    int j;
+
+    buf[sizeof buf - 1] = '\0';
+    for (j = 0; j < SIZEOF (errs); j++)
+      {
+        int err = errs[j];
+        char buf2[sizeof buf] = "";
+        size_t len;
+        size_t i;
+
+        strerror_r (err, buf2, sizeof buf2);
+        len = strlen (buf2);
+        ASSERT (len < sizeof buf);
+
+        for (i = 0; i <= len; i++)
+          {
+            memset (buf, '^', sizeof buf - 1);
+            errno = 0;
+            ret = strerror_r (err, buf, i);
+            ASSERT (errno == 0);
+            if (j == 2)
+              ASSERT (ret == ERANGE || ret == EINVAL);
+            else
+              ASSERT (ret == ERANGE);
+            if (i)
+              {
+                ASSERT (strncmp (buf, buf2, i - 1) == 0);
+                ASSERT (buf[i - 1] == '\0');
+              }
+            ASSERT (strspn (buf + i, "^") == sizeof buf - 1 - i);
+          }
+
+        strcpy (buf, "BADFACE");
+        errno = 0;
+        ret = strerror_r (err, buf, len + 1);
+        ASSERT (ret != ERANGE);
+        ASSERT (errno == 0);
+        ASSERT (strcmp (buf, buf2) == 0);
+      }
+  }
+
+#if GNULIB_STRERROR
+  /* Test that strerror_r does not clobber strerror buffer.  On some
+     platforms, this test can only succeed if gnulib also replaces
+     strerror.  */
+  {
+    const char *msg1;
+    const char *msg2;
+    const char *msg3;
+    const char *msg4;
+    char *str1;
+    char *str2;
+    char *str3;
+    char *str4;
+
+    msg1 = strerror (ENOENT);
+    ASSERT (msg1);
+    str1 = strdup (msg1);
+    ASSERT (str1);
+
+    msg2 = strerror (ERANGE);
+    ASSERT (msg2);
+    str2 = strdup (msg2);
+    ASSERT (str2);
+
+    msg3 = strerror (-4);
+    ASSERT (msg3);
+    str3 = strdup (msg3);
+    ASSERT (str3);
+
+    msg4 = strerror (1729576);
+    ASSERT (msg4);
+    str4 = strdup (msg4);
+    ASSERT (str4);
+
+    strerror_r (EACCES, buf, sizeof buf);
+    strerror_r (-5, buf, sizeof buf);
+    ASSERT (STREQ (msg4, str4));
+
+    free (str1);
+    free (str2);
+    free (str3);
+    free (str4);
+  }
+#endif
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-striconv.c b/src/grep/gnulib-tests/test-striconv.c
new file mode 100644
index 0000000..55bd3df
--- /dev/null
+++ b/src/grep/gnulib-tests/test-striconv.c
@@ -0,0 +1,180 @@
+/* Test of character set conversion.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include "striconv.h"
+
+#if HAVE_ICONV
+# include <iconv.h>
+#endif
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main ()
+{
+#if HAVE_ICONV
+  /* Assume that iconv() supports at least the encodings ASCII, ISO-8859-1,
+     and UTF-8.  */
+  iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1");
+  iconv_t cd_utf8_to_88591 = iconv_open ("ISO-8859-1", "UTF-8");
+
+  ASSERT (cd_88591_to_utf8 != (iconv_t)(-1));
+  ASSERT (cd_utf8_to_88591 != (iconv_t)(-1));
+
+  /* ------------------------- Test mem_cd_iconv() ------------------------- */
+
+  /* Test conversion from ISO-8859-1 to UTF-8 with no errors.  */
+  {
+    static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
+    static const char expected[] = "\303\204rger mit b\303\266sen B\303\274bchen ohne Augenma\303\237";
+    char *result = NULL;
+    size_t length = 0;
+    int retval = mem_cd_iconv (input, strlen (input), cd_88591_to_utf8,
+                               &result, &length);
+    ASSERT (retval == 0);
+    ASSERT (length == strlen (expected));
+    ASSERT (result != NULL && memcmp (result, expected, strlen (expected)) == 0);
+    free (result);
+  }
+
+  /* Test conversion from UTF-8 to ISO-8859-1 with no errors.  */
+  {
+    static const char input[] = "\303\204rger mit b\303\266sen B\303\274bchen ohne Augenma\303\237";
+    static const char expected[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
+    char *result = NULL;
+    size_t length = 0;
+    int retval = mem_cd_iconv (input, strlen (input), cd_utf8_to_88591,
+                               &result, &length);
+    ASSERT (retval == 0);
+    ASSERT (length == strlen (expected));
+    ASSERT (result != NULL && memcmp (result, expected, strlen (expected)) == 0);
+    free (result);
+  }
+
+  /* Test conversion from UTF-8 to ISO-8859-1 with EILSEQ.  */
+  {
+    static const char input[] = "\342\202\254"; /* EURO SIGN */
+    char *result = NULL;
+    size_t length = 0;
+    int retval = mem_cd_iconv (input, strlen (input), cd_utf8_to_88591,
+                               &result, &length);
+    ASSERT (retval == -1 && errno == EILSEQ);
+    ASSERT (result == NULL);
+  }
+
+  /* Test conversion from UTF-8 to ISO-8859-1 with EINVAL.  */
+  {
+    static const char input[] = "\342";
+    char *result = NULL;
+    size_t length = 0;
+    int retval = mem_cd_iconv (input, strlen (input), cd_utf8_to_88591,
+                               &result, &length);
+    ASSERT (retval == 0);
+    ASSERT (length == 0);
+    free (result);
+  }
+
+  /* ------------------------- Test str_cd_iconv() ------------------------- */
+
+  /* Test conversion from ISO-8859-1 to UTF-8 with no errors.  */
+  {
+    static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
+    static const char expected[] = "\303\204rger mit b\303\266sen B\303\274bchen ohne Augenma\303\237";
+    char *result = str_cd_iconv (input, cd_88591_to_utf8);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, expected) == 0);
+    free (result);
+  }
+
+  /* Test conversion from UTF-8 to ISO-8859-1 with no errors.  */
+  {
+    static const char input[] = "\303\204rger mit b\303\266sen B\303\274bchen ohne Augenma\303\237";
+    static const char expected[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
+    char *result = str_cd_iconv (input, cd_utf8_to_88591);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, expected) == 0);
+    free (result);
+  }
+
+  /* Test conversion from UTF-8 to ISO-8859-1 with EILSEQ.  */
+  {
+    static const char input[] = "Costs: 27 \342\202\254"; /* EURO SIGN */
+    char *result = str_cd_iconv (input, cd_utf8_to_88591);
+    ASSERT (result == NULL && errno == EILSEQ);
+  }
+
+  /* Test conversion from UTF-8 to ISO-8859-1 with EINVAL.  */
+  {
+    static const char input[] = "\342";
+    char *result = str_cd_iconv (input, cd_utf8_to_88591);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "") == 0);
+    free (result);
+  }
+
+  iconv_close (cd_88591_to_utf8);
+  iconv_close (cd_utf8_to_88591);
+
+  /* -------------------------- Test str_iconv() -------------------------- */
+
+  /* Test conversion from ISO-8859-1 to UTF-8 with no errors.  */
+  {
+    static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
+    static const char expected[] = "\303\204rger mit b\303\266sen B\303\274bchen ohne Augenma\303\237";
+    char *result = str_iconv (input, "ISO-8859-1", "UTF-8");
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, expected) == 0);
+    free (result);
+  }
+
+  /* Test conversion from UTF-8 to ISO-8859-1 with no errors.  */
+  {
+    static const char input[] = "\303\204rger mit b\303\266sen B\303\274bchen ohne Augenma\303\237";
+    static const char expected[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
+    char *result = str_iconv (input, "UTF-8", "ISO-8859-1");
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, expected) == 0);
+    free (result);
+  }
+
+  /* Test conversion from UTF-8 to ISO-8859-1 with EILSEQ.  */
+  {
+    static const char input[] = "Costs: 27 \342\202\254"; /* EURO SIGN */
+    char *result = str_iconv (input, "UTF-8", "ISO-8859-1");
+    ASSERT (result == NULL && errno == EILSEQ);
+  }
+
+  /* Test conversion from UTF-8 to ISO-8859-1 with EINVAL.  */
+  {
+    static const char input[] = "\342";
+    char *result = str_iconv (input, "UTF-8", "ISO-8859-1");
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "") == 0);
+    free (result);
+  }
+
+#endif
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-string.c b/src/grep/gnulib-tests/test-string.c
new file mode 100644
index 0000000..bad996f
--- /dev/null
+++ b/src/grep/gnulib-tests/test-string.c
@@ -0,0 +1,33 @@
+/* Test of <string.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include "verify.h"
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-strnlen.c b/src/grep/gnulib-tests/test-strnlen.c
new file mode 100644
index 0000000..6470ebc
--- /dev/null
+++ b/src/grep/gnulib-tests/test-strnlen.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2010-2021 Free Software Foundation, Inc.
+ * Written by Eric Blake
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (strnlen, size_t, (char const *, size_t));
+
+#include <stdlib.h>
+
+#include "zerosize-ptr.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  size_t i;
+  char *page_boundary = (char *) zerosize_ptr ();
+  if (!page_boundary)
+    {
+      page_boundary = malloc (0x1000);
+      ASSERT (page_boundary);
+      page_boundary += 0x1000;
+    }
+
+  /* Basic behavior tests.  */
+  ASSERT (strnlen ("a", 0) == 0);
+  ASSERT (strnlen ("a", 1) == 1);
+  ASSERT (strnlen ("a", 2) == 1);
+  ASSERT (strnlen ("", 0x100000) == 0);
+
+  /* Memory fence and alignment testing.  */
+  for (i = 0; i < 512; i++)
+    {
+      char *start = page_boundary - i;
+      size_t j = i;
+      memset (start, 'x', i);
+      do
+        {
+          if (i != j)
+            {
+              start[j] = 0;
+              ASSERT (strnlen (start, i + j) == j);
+            }
+          ASSERT (strnlen (start, i) == j);
+          ASSERT (strnlen (start, j) == j);
+        }
+      while (j--);
+    }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-strstr.c b/src/grep/gnulib-tests/test-strstr.c
new file mode 100644
index 0000000..434fc23
--- /dev/null
+++ b/src/grep/gnulib-tests/test-strstr.c
@@ -0,0 +1,301 @@
+/*
+ * Copyright (C) 2004, 2007-2021 Free Software Foundation, Inc.
+ * Written by Bruno Haible and Eric Blake
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (strstr, char *, (char const *, char const *));
+
+#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "zerosize-ptr.h"
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+#if HAVE_DECL_ALARM
+  /* Declare failure if test takes too long, by using default abort
+     caused by SIGALRM.  All known platforms that lack alarm also have
+     a quadratic strstr, and the replacement strstr is known to not
+     take too long.  */
+  int alarm_value = 50;
+  signal (SIGALRM, SIG_DFL);
+  alarm (alarm_value);
+#endif
+
+  {
+    const char input[] = "foo";
+    const char *result = strstr (input, "");
+    ASSERT (result == input);
+  }
+
+  {
+    const char input[] = "foo";
+    const char *result = strstr (input, "o");
+    ASSERT (result == input + 1);
+  }
+
+  {
+    /* On some platforms, the memchr() functions reads past the first
+       occurrence of the byte to be searched, leading to an out-of-bounds
+       read access for strstr().
+       See <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=521737>.
+       This is a bug in memchr(), see the Austin Group's clarification
+       <https://www.opengroup.org/austin/docs/austin_454.txt>.  */
+    const char *fix = "aBaaaaaaaaaaax";
+    char *page_boundary = (char *) zerosize_ptr ();
+    size_t len = strlen (fix) + 1;
+    char *input = page_boundary ? page_boundary - len : malloc (len);
+    const char *result;
+
+    strcpy (input, fix);
+    result = strstr (input, "B1x");
+    ASSERT (result == NULL);
+    if (!page_boundary)
+      free (input);
+  }
+
+  {
+    const char input[] = "ABC ABCDAB ABCDABCDABDE";
+    const char *result = strstr (input, "ABCDABD");
+    ASSERT (result == input + 15);
+  }
+
+  {
+    const char input[] = "ABC ABCDAB ABCDABCDABDE";
+    const char *result = strstr (input, "ABCDABE");
+    ASSERT (result == NULL);
+  }
+
+  {
+    const char input[] = "ABC ABCDAB ABCDABCDABDE";
+    const char *result = strstr (input, "ABCDABCD");
+    ASSERT (result == input + 11);
+  }
+
+  /* Check that a long periodic needle does not cause false positives.  */
+  {
+    const char input[] = "F_BD_CE_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD"
+                         "_C3_88_20_EF_BF_BD_EF_BF_BD_EF_BF_BD"
+                         "_C3_A7_20_EF_BF_BD";
+    const char need[] = "_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD";
+    const char *result = strstr (input, need);
+    ASSERT (result == NULL);
+  }
+  {
+    const char input[] = "F_BD_CE_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD"
+                         "_C3_88_20_EF_BF_BD_EF_BF_BD_EF_BF_BD"
+                         "_C3_A7_20_EF_BF_BD_DA_B5_C2_A6_20"
+                         "_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD";
+    const char need[] = "_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD";
+    const char *result = strstr (input, need);
+    ASSERT (result == input + 115);
+  }
+
+  /* Check that a very long haystack is handled quickly if the needle is
+     short and occurs near the beginning.  */
+  {
+    size_t repeat = 10000;
+    size_t m = 1000000;
+    const char *needle =
+      "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+      "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
+    char *haystack = (char *) malloc (m + 1);
+    if (haystack != NULL)
+      {
+        memset (haystack, 'A', m);
+        haystack[0] = 'B';
+        haystack[m] = '\0';
+
+        for (; repeat > 0; repeat--)
+          {
+            ASSERT (strstr (haystack, needle) == haystack + 1);
+          }
+
+        free (haystack);
+      }
+  }
+
+  /* Check that a very long needle is discarded quickly if the haystack is
+     short.  */
+  {
+    size_t repeat = 10000;
+    size_t m = 1000000;
+    const char *haystack =
+      "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+      "ABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABAB";
+    char *needle = (char *) malloc (m + 1);
+    if (needle != NULL)
+      {
+        memset (needle, 'A', m);
+        needle[m] = '\0';
+
+        for (; repeat > 0; repeat--)
+          {
+            ASSERT (strstr (haystack, needle) == NULL);
+          }
+
+        free (needle);
+      }
+  }
+
+  /* Check that the asymptotic worst-case complexity is not quadratic.  */
+  {
+    size_t m = 1000000;
+    char *haystack = (char *) malloc (2 * m + 2);
+    char *needle = (char *) malloc (m + 2);
+    if (haystack != NULL && needle != NULL)
+      {
+        const char *result;
+
+        memset (haystack, 'A', 2 * m);
+        haystack[2 * m] = 'B';
+        haystack[2 * m + 1] = '\0';
+
+        memset (needle, 'A', m);
+        needle[m] = 'B';
+        needle[m + 1] = '\0';
+
+        result = strstr (haystack, needle);
+        ASSERT (result == haystack + m);
+      }
+    free (needle);
+    free (haystack);
+  }
+
+  /* Sublinear speed is only possible in memmem; strstr must examine
+     every character of haystack to find its length.  */
+
+
+  {
+    /* Ensure that with a barely periodic "short" needle, strstr's
+       search does not mistakenly skip just past the match point.
+       This use of strstr would mistakenly return NULL before
+       gnulib v0.0-4927.  */
+    const char *haystack =
+      "\n"
+      "with_build_libsubdir\n"
+      "with_local_prefix\n"
+      "with_gxx_include_dir\n"
+      "with_cpp_install_dir\n"
+      "enable_generated_files_in_srcdir\n"
+      "with_gnu_ld\n"
+      "with_ld\n"
+      "with_demangler_in_ld\n"
+      "with_gnu_as\n"
+      "with_as\n"
+      "enable_largefile\n"
+      "enable_werror_always\n"
+      "enable_checking\n"
+      "enable_coverage\n"
+      "enable_gather_detailed_mem_stats\n"
+      "enable_build_with_cxx\n"
+      "with_stabs\n"
+      "enable_multilib\n"
+      "enable___cxa_atexit\n"
+      "enable_decimal_float\n"
+      "enable_fixed_point\n"
+      "enable_threads\n"
+      "enable_tls\n"
+      "enable_objc_gc\n"
+      "with_dwarf2\n"
+      "enable_shared\n"
+      "with_build_sysroot\n"
+      "with_sysroot\n"
+      "with_specs\n"
+      "with_pkgversion\n"
+      "with_bugurl\n"
+      "enable_languages\n"
+      "with_multilib_list\n";
+    const char *needle = "\n"
+      "with_gnu_ld\n";
+    const char* p = strstr (haystack, needle);
+    ASSERT (p - haystack == 114);
+  }
+
+  {
+    /* Same bug, shorter trigger.  */
+    const char *haystack = "..wi.d.";
+    const char *needle = ".d.";
+    const char* p = strstr (haystack, needle);
+    ASSERT (p - haystack == 4);
+  }
+
+  {
+    /* Like the above, but trigger the flaw in two_way_long_needle
+       by using a needle of length LONG_NEEDLE_THRESHOLD (32) or greater.
+       Rather than trying to find the right alignment manually, I've
+       arbitrarily chosen the following needle and template for the
+       haystack, and ensure that for each placement of the needle in
+       that haystack, strstr finds it.  */
+    const char *needle = "\nwith_gnu_ld-extend-to-len-32-b\n";
+    const char *h =
+      "\n"
+      "with_build_libsubdir\n"
+      "with_local_prefix\n"
+      "with_gxx_include_dir\n"
+      "with_cpp_install_dir\n"
+      "with_e_\n"
+      "..............................\n"
+      "with_FGHIJKLMNOPQRSTUVWXYZ\n"
+      "with_567890123456789\n"
+      "with_multilib_list\n";
+    size_t h_len = strlen (h);
+    char *haystack = malloc (h_len + 1);
+    size_t i;
+    ASSERT (haystack);
+    for (i = 0; i < h_len - strlen (needle); i++)
+      {
+        const char *p;
+        memcpy (haystack, h, h_len + 1);
+        memcpy (haystack + i, needle, strlen (needle) + 1);
+        p = strstr (haystack, needle);
+        ASSERT (p);
+        ASSERT (p - haystack == i);
+      }
+    free (haystack);
+  }
+
+  /* Test long needles.  */
+  {
+    size_t m = 1024;
+    char *haystack = (char *) malloc (2 * m + 1);
+    char *needle = (char *) malloc (m + 1);
+    if (haystack != NULL && needle != NULL)
+      {
+        const char *p;
+        haystack[0] = 'x';
+        memset (haystack + 1, ' ', m - 1);
+        memset (haystack + m, 'x', m);
+        haystack[2 * m] = '\0';
+        memset (needle, 'x', m);
+        needle[m] = '\0';
+        p = strstr (haystack, needle);
+        ASSERT (p);
+        ASSERT (p - haystack == m);
+      }
+    free (needle);
+    free (haystack);
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-strtoimax.c b/src/grep/gnulib-tests/test-strtoimax.c
new file mode 100644
index 0000000..3aa83c6
--- /dev/null
+++ b/src/grep/gnulib-tests/test-strtoimax.c
@@ -0,0 +1,181 @@
+/*
+ * Copyright (C) 2011-2021 Free Software Foundation, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <inttypes.h>
+
+#include "signature.h"
+#ifndef strtoimax
+SIGNATURE_CHECK (strtoimax, intmax_t, (const char *, char **, int));
+#endif
+
+#include <errno.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  /* Subject sequence empty or invalid.  */
+  {
+    const char input[] = "";
+    char *ptr;
+    intmax_t result;
+    errno = 0;
+    result = strtoimax (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+  {
+    const char input[] = " ";
+    char *ptr;
+    intmax_t result;
+    errno = 0;
+    result = strtoimax (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+  {
+    const char input[] = " +";
+    char *ptr;
+    intmax_t result;
+    errno = 0;
+    result = strtoimax (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+  {
+    const char input[] = " -";
+    char *ptr;
+    intmax_t result;
+    errno = 0;
+    result = strtoimax (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+
+  /* Simple integer values.  */
+  {
+    const char input[] = "0";
+    char *ptr;
+    intmax_t result;
+    errno = 0;
+    result = strtoimax (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input + 1);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "+0";
+    char *ptr;
+    intmax_t result;
+    errno = 0;
+    result = strtoimax (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input + 2);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "-0";
+    char *ptr;
+    intmax_t result;
+    errno = 0;
+    result = strtoimax (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input + 2);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "23";
+    char *ptr;
+    intmax_t result;
+    errno = 0;
+    result = strtoimax (input, &ptr, 10);
+    ASSERT (result == 23);
+    ASSERT (ptr == input + 2);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = " 23";
+    char *ptr;
+    intmax_t result;
+    errno = 0;
+    result = strtoimax (input, &ptr, 10);
+    ASSERT (result == 23);
+    ASSERT (ptr == input + 3);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "+23";
+    char *ptr;
+    intmax_t result;
+    errno = 0;
+    result = strtoimax (input, &ptr, 10);
+    ASSERT (result == 23);
+    ASSERT (ptr == input + 3);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "-23";
+    char *ptr;
+    intmax_t result;
+    errno = 0;
+    result = strtoimax (input, &ptr, 10);
+    ASSERT (result == -23);
+    ASSERT (ptr == input + 3);
+    ASSERT (errno == 0);
+  }
+
+  /* Large integer values.  */
+  {
+    const char input[] = "2147483647";
+    char *ptr;
+    intmax_t result;
+    errno = 0;
+    result = strtoimax (input, &ptr, 10);
+    ASSERT (result == 2147483647);
+    ASSERT (ptr == input + 10);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "-2147483648";
+    char *ptr;
+    intmax_t result;
+    errno = 0;
+    result = strtoimax (input, &ptr, 10);
+    ASSERT (result == -2147483647 - 1);
+    ASSERT (ptr == input + 11);
+    ASSERT (errno == 0);
+  }
+  if (sizeof (intmax_t) > sizeof (int))
+    {
+      const char input[] = "4294967295";
+      char *ptr;
+      intmax_t result;
+      errno = 0;
+      result = strtoimax (input, &ptr, 10);
+      ASSERT (result == (intmax_t) 65535 * (intmax_t) 65537);
+      ASSERT (ptr == input + 10);
+      ASSERT (errno == 0);
+    }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-strtoll.c b/src/grep/gnulib-tests/test-strtoll.c
new file mode 100644
index 0000000..5f2b193
--- /dev/null
+++ b/src/grep/gnulib-tests/test-strtoll.c
@@ -0,0 +1,243 @@
+/*
+ * Copyright (C) 2011-2021 Free Software Foundation, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdlib.h>
+
+#include "signature.h"
+#ifndef strtoll
+SIGNATURE_CHECK (strtoll, long long, (const char *, char **, int));
+#endif
+
+#include <errno.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  /* Subject sequence empty or invalid.  */
+  {
+    const char input[] = "";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+  {
+    const char input[] = " ";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+  {
+    const char input[] = " +";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+  {
+    const char input[] = " -";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+
+  /* Simple integer values.  */
+  {
+    const char input[] = "0";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input + 1);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "+0";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input + 2);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "-0";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input + 2);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "23";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 23);
+    ASSERT (ptr == input + 2);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = " 23";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 23);
+    ASSERT (ptr == input + 3);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "+23";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 23);
+    ASSERT (ptr == input + 3);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "-23";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == -23);
+    ASSERT (ptr == input + 3);
+    ASSERT (errno == 0);
+  }
+
+  /* Large integer values.  */
+  {
+    const char input[] = "2147483647";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 2147483647);
+    ASSERT (ptr == input + 10);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "-2147483648";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == -2147483647 - 1);
+    ASSERT (ptr == input + 11);
+    ASSERT (errno == 0);
+  }
+  if (sizeof (long long) > sizeof (int))
+    {
+      const char input[] = "4294967295";
+      char *ptr;
+      long long result;
+      errno = 0;
+      result = strtoll (input, &ptr, 10);
+      ASSERT (result == 65535LL * 65537LL);
+      ASSERT (ptr == input + 10);
+      ASSERT (errno == 0);
+    }
+
+  /* Hexadecimal integer syntax.  */
+  {
+    const char input[] = "0x2A";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0LL);
+    ASSERT (ptr == input + 1);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "0x2A";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 16);
+    ASSERT (result == 42LL);
+    ASSERT (ptr == input + 4);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "0x2A";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 0);
+    ASSERT (result == 42LL);
+    ASSERT (ptr == input + 4);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "0x";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0LL);
+    ASSERT (ptr == input + 1);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "0x";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 16);
+    ASSERT (result == 0LL);
+    ASSERT (ptr == input + 1);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "0x";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 0);
+    ASSERT (result == 0LL);
+    ASSERT (ptr == input + 1);
+    ASSERT (errno == 0);
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-strtoull.c b/src/grep/gnulib-tests/test-strtoull.c
new file mode 100644
index 0000000..db7b371
--- /dev/null
+++ b/src/grep/gnulib-tests/test-strtoull.c
@@ -0,0 +1,242 @@
+/*
+ * Copyright (C) 2011-2021 Free Software Foundation, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdlib.h>
+
+#include "signature.h"
+#ifndef strtoull
+SIGNATURE_CHECK (strtoull, unsigned long long, (const char *, char **, int));
+#endif
+
+#include <errno.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  /* Subject sequence empty or invalid.  */
+  {
+    const char input[] = "";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+  {
+    const char input[] = " ";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+  {
+    const char input[] = " +";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+  {
+    const char input[] = " -";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+
+  /* Simple integer values.  */
+  {
+    const char input[] = "0";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input + 1);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "+0";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input + 2);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "-0";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input + 2);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "23";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 10);
+    ASSERT (result == 23);
+    ASSERT (ptr == input + 2);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = " 23";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 10);
+    ASSERT (result == 23);
+    ASSERT (ptr == input + 3);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "+23";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 10);
+    ASSERT (result == 23);
+    ASSERT (ptr == input + 3);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "-23";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 10);
+    ASSERT (result == - 23ULL);
+    ASSERT (ptr == input + 3);
+    ASSERT (errno == 0);
+  }
+
+  /* Large integer values.  */
+  {
+    const char input[] = "2147483647";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 10);
+    ASSERT (result == 2147483647);
+    ASSERT (ptr == input + 10);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "-2147483648";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 10);
+    ASSERT (result == - 2147483648ULL);
+    ASSERT (ptr == input + 11);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "4294967295";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 10);
+    ASSERT (result == 4294967295U);
+    ASSERT (ptr == input + 10);
+    ASSERT (errno == 0);
+  }
+
+  /* Hexadecimal integer syntax.  */
+  {
+    const char input[] = "0x2A";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 10);
+    ASSERT (result == 0ULL);
+    ASSERT (ptr == input + 1);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "0x2A";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 16);
+    ASSERT (result == 42ULL);
+    ASSERT (ptr == input + 4);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "0x2A";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 0);
+    ASSERT (result == 42ULL);
+    ASSERT (ptr == input + 4);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "0x";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 10);
+    ASSERT (result == 0ULL);
+    ASSERT (ptr == input + 1);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "0x";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 16);
+    ASSERT (result == 0ULL);
+    ASSERT (ptr == input + 1);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "0x";
+    char *ptr;
+    unsigned long long result;
+    errno = 0;
+    result = strtoull (input, &ptr, 0);
+    ASSERT (result == 0ULL);
+    ASSERT (ptr == input + 1);
+    ASSERT (errno == 0);
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-strtoumax.c b/src/grep/gnulib-tests/test-strtoumax.c
new file mode 100644
index 0000000..8c16ea4
--- /dev/null
+++ b/src/grep/gnulib-tests/test-strtoumax.c
@@ -0,0 +1,180 @@
+/*
+ * Copyright (C) 2011-2021 Free Software Foundation, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <inttypes.h>
+
+#include "signature.h"
+#ifndef strtoumax
+SIGNATURE_CHECK (strtoumax, uintmax_t, (const char *, char **, int));
+#endif
+
+#include <errno.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  /* Subject sequence empty or invalid.  */
+  {
+    const char input[] = "";
+    char *ptr;
+    uintmax_t result;
+    errno = 0;
+    result = strtoumax (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+  {
+    const char input[] = " ";
+    char *ptr;
+    uintmax_t result;
+    errno = 0;
+    result = strtoumax (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+  {
+    const char input[] = " +";
+    char *ptr;
+    uintmax_t result;
+    errno = 0;
+    result = strtoumax (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+  {
+    const char input[] = " -";
+    char *ptr;
+    uintmax_t result;
+    errno = 0;
+    result = strtoumax (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+
+  /* Simple integer values.  */
+  {
+    const char input[] = "0";
+    char *ptr;
+    uintmax_t result;
+    errno = 0;
+    result = strtoumax (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input + 1);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "+0";
+    char *ptr;
+    uintmax_t result;
+    errno = 0;
+    result = strtoumax (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input + 2);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "-0";
+    char *ptr;
+    uintmax_t result;
+    errno = 0;
+    result = strtoumax (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input + 2);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "23";
+    char *ptr;
+    uintmax_t result;
+    errno = 0;
+    result = strtoumax (input, &ptr, 10);
+    ASSERT (result == 23);
+    ASSERT (ptr == input + 2);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = " 23";
+    char *ptr;
+    uintmax_t result;
+    errno = 0;
+    result = strtoumax (input, &ptr, 10);
+    ASSERT (result == 23);
+    ASSERT (ptr == input + 3);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "+23";
+    char *ptr;
+    uintmax_t result;
+    errno = 0;
+    result = strtoumax (input, &ptr, 10);
+    ASSERT (result == 23);
+    ASSERT (ptr == input + 3);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "-23";
+    char *ptr;
+    uintmax_t result;
+    errno = 0;
+    result = strtoumax (input, &ptr, 10);
+    ASSERT (result == - (uintmax_t) 23);
+    ASSERT (ptr == input + 3);
+    ASSERT (errno == 0);
+  }
+
+  /* Large integer values.  */
+  {
+    const char input[] = "2147483647";
+    char *ptr;
+    uintmax_t result;
+    errno = 0;
+    result = strtoumax (input, &ptr, 10);
+    ASSERT (result == 2147483647);
+    ASSERT (ptr == input + 10);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "-2147483648";
+    char *ptr;
+    uintmax_t result;
+    errno = 0;
+    result = strtoumax (input, &ptr, 10);
+    ASSERT (result == - (uintmax_t) 2147483648U);
+    ASSERT (ptr == input + 11);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "4294967295";
+    char *ptr;
+    uintmax_t result;
+    errno = 0;
+    result = strtoumax (input, &ptr, 10);
+    ASSERT (result == 4294967295U);
+    ASSERT (ptr == input + 10);
+    ASSERT (errno == 0);
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-symlink.c b/src/grep/gnulib-tests/test-symlink.c
new file mode 100644
index 0000000..95a3fbf
--- /dev/null
+++ b/src/grep/gnulib-tests/test-symlink.c
@@ -0,0 +1,47 @@
+/* Tests of symlink.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (symlink, int, (char const *, char const *));
+
+#include <fcntl.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+
+#include "ignore-value.h"
+#include "macros.h"
+
+#define BASE "test-symlink.t"
+
+#include "test-symlink.h"
+
+int
+main (void)
+{
+  /* Remove any leftovers from a previous partial run.  */
+  ignore_value (system ("rm -rf " BASE "*"));
+
+  return test_symlink (symlink, true);
+}
diff --git a/src/grep/gnulib-tests/test-symlink.h b/src/grep/gnulib-tests/test-symlink.h
new file mode 100644
index 0000000..3128d0a
--- /dev/null
+++ b/src/grep/gnulib-tests/test-symlink.h
@@ -0,0 +1,96 @@
+/* Tests of symlink.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+/* This file is designed to test both symlink(a,b) and
+   symlinkat(a,AT_FDCWD,b).  FUNC is the function to test.  Assumes
+   that BASE and ASSERT are already defined, and that appropriate
+   headers are already included.  If PRINT, warn before skipping
+   symlink tests with status 77.  */
+
+static int
+test_symlink (int (*func) (char const *, char const *), bool print)
+{
+  if (func ("nowhere", BASE "link1"))
+    {
+      if (print)
+        fputs ("skipping test: symlinks not supported on this file system\n",
+               stderr);
+      return 77;
+    }
+
+  /* Some systems allow the creation of 0-length symlinks as a synonym
+     for "."; but most reject it.  */
+  {
+    int status;
+    errno = 0;
+    status = func ("", BASE "link2");
+    if (status == -1)
+      ASSERT (errno == ENOENT || errno == EINVAL);
+    else
+      {
+        ASSERT (status == 0);
+        ASSERT (unlink (BASE "link2") == 0);
+      }
+  }
+
+  /* Sanity checks of failures.  */
+  errno = 0;
+  ASSERT (func ("nowhere", "") == -1);
+  ASSERT (errno == ENOENT);
+  errno = 0;
+  ASSERT (func ("nowhere", ".") == -1);
+  ASSERT (errno == EEXIST || errno == EINVAL);
+  errno = 0;
+  ASSERT (func ("somewhere", BASE "link1") == -1);
+  ASSERT (errno == EEXIST);
+  errno = 0;
+  ASSERT (func ("nowhere", BASE "link2/") == -1);
+  ASSERT (errno == ENOTDIR || errno == ENOENT);
+  ASSERT (mkdir (BASE "dir", 0700) == 0);
+  errno = 0;
+  ASSERT (func ("nowhere", BASE "dir") == -1);
+  ASSERT (errno == EEXIST);
+  errno = 0;
+  ASSERT (func ("nowhere", BASE "dir/") == -1);
+  ASSERT (errno == EEXIST || errno == EINVAL
+          || errno == ENOENT /* Lustre FS on Linux */);
+  ASSERT (close (creat (BASE "file", 0600)) == 0);
+  errno = 0;
+  ASSERT (func ("nowhere", BASE "file") == -1);
+  ASSERT (errno == EEXIST);
+  errno = 0;
+  ASSERT (func ("nowhere", BASE "file/") == -1);
+  ASSERT (errno == EEXIST || errno == ENOTDIR || errno == ENOENT);
+
+  /* Trailing slash must always be rejected.  */
+  ASSERT (unlink (BASE "link1") == 0);
+  ASSERT (func (BASE "link2", BASE "link1") == 0);
+  errno = 0;
+  ASSERT (func (BASE "nowhere", BASE "link1/") == -1);
+  ASSERT (errno == EEXIST || errno == ENOTDIR || errno == ENOENT);
+  errno = 0;
+  ASSERT (unlink (BASE "link2") == -1);
+  ASSERT (errno == ENOENT);
+
+  /* Cleanup.  */
+  ASSERT (rmdir (BASE "dir") == 0);
+  ASSERT (unlink (BASE "file") == 0);
+  ASSERT (unlink (BASE "link1") == 0);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-sys_ioctl.c b/src/grep/gnulib-tests/test-sys_ioctl.c
new file mode 100644
index 0000000..151bf31
--- /dev/null
+++ b/src/grep/gnulib-tests/test-sys_ioctl.c
@@ -0,0 +1,27 @@
+/* Test of <sys/ioctl.h> substitute.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <sys/ioctl.h>
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-sys_select.c b/src/grep/gnulib-tests/test-sys_select.c
new file mode 100644
index 0000000..48667ce
--- /dev/null
+++ b/src/grep/gnulib-tests/test-sys_select.c
@@ -0,0 +1,59 @@
+/* Test of <sys/select.h> substitute.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <sys/select.h>
+
+#include "signature.h"
+
+/* The following may be macros without underlying functions, so only
+   check signature if they are not macros.  */
+#ifndef FD_CLR
+SIGNATURE_CHECK (FD_CLR, void, (int, fd_set *));
+#endif
+#ifndef FD_ISSET
+SIGNATURE_CHECK (FD_ISSET, void, (int, fd_set *));
+#endif
+#ifndef FD_SET
+SIGNATURE_CHECK (FD_SET, int, (int, fd_set *));
+#endif
+#ifndef FD_ZERO
+SIGNATURE_CHECK (FD_ZERO, void, (fd_set *));
+#endif
+
+/* Check that the 'struct timeval' type is defined.  */
+struct timeval a;
+
+/* Check that a.tv_sec is wide enough to hold a time_t, ignoring
+   signedness issues.  */
+typedef int verify_tv_sec_type[sizeof (time_t) <= sizeof (a.tv_sec) ? 1 : -1];
+
+/* Check that sigset_t is defined.  */
+sigset_t t2;
+
+int
+main (void)
+{
+  /* Check that FD_ZERO can be used.  This should not yield a warning
+     such as "warning: implicit declaration of function 'memset'".  */
+  fd_set fds;
+  FD_ZERO (&fds);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-sys_socket.c b/src/grep/gnulib-tests/test-sys_socket.c
new file mode 100644
index 0000000..49f4958
--- /dev/null
+++ b/src/grep/gnulib-tests/test-sys_socket.c
@@ -0,0 +1,68 @@
+/* Test of <sys/socket.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include <errno.h>
+
+#if HAVE_SHUTDOWN
+/* Check some integer constant expressions.  */
+int a[] = { SHUT_RD, SHUT_WR, SHUT_RDWR };
+#endif
+
+/* Check that the 'socklen_t' type is defined.  */
+socklen_t t1;
+
+/* Check that the 'size_t' and 'ssize_t' types are defined.  */
+size_t t2;
+ssize_t t3;
+
+/* Check that 'struct iovec' is defined.  */
+struct iovec io;
+
+/* Check that a minimal set of 'struct msghdr' is defined.  */
+struct msghdr msg;
+
+int
+main (void)
+{
+  struct sockaddr_storage x;
+  sa_family_t i;
+
+  /* Check some errno values.  */
+  switch (ENOTSOCK)
+    {
+    case ENOTSOCK:
+    case EADDRINUSE:
+    case ENETRESET:
+    case ECONNABORTED:
+    case ECONNRESET:
+    case ENOTCONN:
+    case ESHUTDOWN:
+      break;
+    }
+
+  x.ss_family = 42;
+  i = 42;
+  msg.msg_iov = &io;
+
+  return (x.ss_family - i + msg.msg_namelen + msg.msg_iov->iov_len
+          + msg.msg_iovlen);
+}
diff --git a/src/grep/gnulib-tests/test-sys_stat.c b/src/grep/gnulib-tests/test-sys_stat.c
new file mode 100644
index 0000000..e5f88c0
--- /dev/null
+++ b/src/grep/gnulib-tests/test-sys_stat.c
@@ -0,0 +1,340 @@
+/* Test of <sys/stat.h> substitute.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <sys/stat.h>
+
+#include "verify.h"
+
+/* Check the existence of some macros.  */
+int a[] =
+  {
+    S_IFMT,
+#ifdef S_IFBLK /* missing on MSVC */
+    S_IFBLK,
+#endif
+    S_IFCHR, S_IFDIR, S_IFIFO, S_IFREG,
+#ifdef S_IFLNK /* missing on native Windows and DJGPP */
+    S_IFLNK,
+#endif
+#ifdef S_IFSOCK /* missing on native Windows and DJGPP */
+    S_IFSOCK,
+#endif
+    S_IRWXU, S_IRUSR, S_IWUSR, S_IXUSR,
+    S_IRWXG, S_IRGRP, S_IWGRP, S_IXGRP,
+    S_IRWXO, S_IROTH, S_IWOTH, S_IXOTH,
+    S_ISUID, S_ISGID, S_ISVTX,
+    S_ISBLK (S_IFREG),
+    S_ISCHR (S_IFREG),
+    S_ISDIR (S_IFREG),
+    S_ISFIFO (S_IFREG),
+    S_ISREG (S_IFREG),
+    S_ISLNK (S_IFREG),
+    S_ISSOCK (S_IFREG),
+    S_ISDOOR (S_IFREG),
+    S_ISMPB (S_IFREG),
+    S_ISMPX (S_IFREG),
+    S_ISNAM (S_IFREG),
+    S_ISNWK (S_IFREG),
+    S_ISPORT (S_IFREG),
+    S_ISCTG (S_IFREG),
+    S_ISOFD (S_IFREG),
+    S_ISOFL (S_IFREG),
+    S_ISWHT (S_IFREG)
+  };
+
+/* Sanity checks.  */
+
+verify (S_IRWXU == (S_IRUSR | S_IWUSR | S_IXUSR));
+verify (S_IRWXG == (S_IRGRP | S_IWGRP | S_IXGRP));
+verify (S_IRWXO == (S_IROTH | S_IWOTH | S_IXOTH));
+
+#ifdef S_IFBLK
+verify (S_ISBLK (S_IFBLK));
+#endif
+verify (!S_ISBLK (S_IFCHR));
+verify (!S_ISBLK (S_IFDIR));
+verify (!S_ISBLK (S_IFIFO));
+verify (!S_ISBLK (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISBLK (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISBLK (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISCHR (S_IFBLK));
+#endif
+verify (S_ISCHR (S_IFCHR));
+verify (!S_ISCHR (S_IFDIR));
+verify (!S_ISCHR (S_IFIFO));
+verify (!S_ISCHR (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISCHR (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISCHR (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISDIR (S_IFBLK));
+#endif
+verify (!S_ISDIR (S_IFCHR));
+verify (S_ISDIR (S_IFDIR));
+verify (!S_ISDIR (S_IFIFO));
+verify (!S_ISDIR (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISDIR (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISDIR (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISFIFO (S_IFBLK));
+#endif
+verify (!S_ISFIFO (S_IFCHR));
+verify (!S_ISFIFO (S_IFDIR));
+verify (S_ISFIFO (S_IFIFO));
+verify (!S_ISFIFO (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISFIFO (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISFIFO (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISREG (S_IFBLK));
+#endif
+verify (!S_ISREG (S_IFCHR));
+verify (!S_ISREG (S_IFDIR));
+verify (!S_ISREG (S_IFIFO));
+verify (S_ISREG (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISREG (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISREG (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISLNK (S_IFBLK));
+#endif
+verify (!S_ISLNK (S_IFCHR));
+verify (!S_ISLNK (S_IFDIR));
+verify (!S_ISLNK (S_IFIFO));
+verify (!S_ISLNK (S_IFREG));
+#ifdef S_IFLNK
+verify (S_ISLNK (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISLNK (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISSOCK (S_IFBLK));
+#endif
+verify (!S_ISSOCK (S_IFCHR));
+verify (!S_ISSOCK (S_IFDIR));
+verify (!S_ISSOCK (S_IFIFO));
+verify (!S_ISSOCK (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISSOCK (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (S_ISSOCK (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISDOOR (S_IFBLK));
+#endif
+verify (!S_ISDOOR (S_IFCHR));
+verify (!S_ISDOOR (S_IFDIR));
+verify (!S_ISDOOR (S_IFIFO));
+verify (!S_ISDOOR (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISDOOR (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISDOOR (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISMPB (S_IFBLK));
+#endif
+verify (!S_ISMPB (S_IFCHR));
+verify (!S_ISMPB (S_IFDIR));
+verify (!S_ISMPB (S_IFIFO));
+verify (!S_ISMPB (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISMPB (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISMPB (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISMPX (S_IFBLK));
+#endif
+verify (!S_ISMPX (S_IFCHR));
+verify (!S_ISMPX (S_IFDIR));
+verify (!S_ISMPX (S_IFIFO));
+verify (!S_ISMPX (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISMPX (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISMPX (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISNAM (S_IFBLK));
+#endif
+verify (!S_ISNAM (S_IFCHR));
+verify (!S_ISNAM (S_IFDIR));
+verify (!S_ISNAM (S_IFIFO));
+verify (!S_ISNAM (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISNAM (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISNAM (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISNWK (S_IFBLK));
+#endif
+verify (!S_ISNWK (S_IFCHR));
+verify (!S_ISNWK (S_IFDIR));
+verify (!S_ISNWK (S_IFIFO));
+verify (!S_ISNWK (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISNWK (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISNWK (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISPORT (S_IFBLK));
+#endif
+verify (!S_ISPORT (S_IFCHR));
+verify (!S_ISPORT (S_IFDIR));
+verify (!S_ISPORT (S_IFIFO));
+verify (!S_ISPORT (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISPORT (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISPORT (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISCTG (S_IFBLK));
+#endif
+verify (!S_ISCTG (S_IFCHR));
+verify (!S_ISCTG (S_IFDIR));
+verify (!S_ISCTG (S_IFIFO));
+verify (!S_ISCTG (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISCTG (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISCTG (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISOFD (S_IFBLK));
+#endif
+verify (!S_ISOFD (S_IFCHR));
+verify (!S_ISOFD (S_IFDIR));
+verify (!S_ISOFD (S_IFIFO));
+verify (!S_ISOFD (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISOFD (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISOFD (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISOFL (S_IFBLK));
+#endif
+verify (!S_ISOFL (S_IFCHR));
+verify (!S_ISOFL (S_IFDIR));
+verify (!S_ISOFL (S_IFIFO));
+verify (!S_ISOFL (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISOFL (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISOFL (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISWHT (S_IFBLK));
+#endif
+verify (!S_ISWHT (S_IFCHR));
+verify (!S_ISWHT (S_IFDIR));
+verify (!S_ISWHT (S_IFIFO));
+verify (!S_ISWHT (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISWHT (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISWHT (S_IFSOCK));
+#endif
+
+/* POSIX 2008 requires traditional encoding of permission constants.  */
+verify (S_IRWXU == 00700);
+verify (S_IRUSR == 00400);
+verify (S_IWUSR == 00200);
+verify (S_IXUSR == 00100);
+verify (S_IRWXG == 00070);
+verify (S_IRGRP == 00040);
+verify (S_IWGRP == 00020);
+verify (S_IXGRP == 00010);
+verify (S_IRWXO == 00007);
+verify (S_IROTH == 00004);
+verify (S_IWOTH == 00002);
+verify (S_IXOTH == 00001);
+verify (S_ISUID == 04000);
+verify (S_ISGID == 02000);
+verify (S_ISVTX == 01000);
+
+#if ((0 <= UTIME_NOW && UTIME_NOW < 1000000000)           \
+     || (0 <= UTIME_OMIT && UTIME_OMIT < 1000000000)      \
+     || UTIME_NOW == UTIME_OMIT)
+invalid UTIME macros
+#endif
+
+/* Check the existence of some types.  */
+nlink_t t1;
+off_t t2;
+mode_t t3;
+
+struct timespec st;
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-sys_time.c b/src/grep/gnulib-tests/test-sys_time.c
new file mode 100644
index 0000000..764321b
--- /dev/null
+++ b/src/grep/gnulib-tests/test-sys_time.c
@@ -0,0 +1,34 @@
+/* Test of <sys/time.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <sys/time.h>
+
+/* Check that the 'struct timeval' type is defined.  */
+struct timeval a;
+
+/* Check that a.tv_sec is wide enough to hold a time_t, ignoring
+   signedness issues.  */
+typedef int verify_tv_sec_type[sizeof (time_t) <= sizeof (a.tv_sec) ? 1 : -1];
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-sys_types.c b/src/grep/gnulib-tests/test-sys_types.c
new file mode 100644
index 0000000..a0bcc04
--- /dev/null
+++ b/src/grep/gnulib-tests/test-sys_types.c
@@ -0,0 +1,34 @@
+/* Test of <sys/types.h> substitute.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include <sys/types.h>
+
+/* Check that the types are all defined.  */
+pid_t t1;
+size_t t2;
+ssize_t t3;
+off_t t4;
+mode_t t5;
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-sys_uio.c b/src/grep/gnulib-tests/test-sys_uio.c
new file mode 100644
index 0000000..723f36b
--- /dev/null
+++ b/src/grep/gnulib-tests/test-sys_uio.c
@@ -0,0 +1,32 @@
+/* Test of <sys/uio.h> substitute.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <eblake@redhat.com>, 2011.  */
+
+#include <config.h>
+
+#include <sys/uio.h>
+
+/* Check that necessary types are defined.  */
+size_t a;
+ssize_t b;
+struct iovec c;
+
+int
+main (void)
+{
+  return a + b + !!c.iov_base + c.iov_len;
+}
diff --git a/src/grep/gnulib-tests/test-sys_wait.h b/src/grep/gnulib-tests/test-sys_wait.h
new file mode 100644
index 0000000..4508f57
--- /dev/null
+++ b/src/grep/gnulib-tests/test-sys_wait.h
@@ -0,0 +1,53 @@
+/* Test of macros shared between <sys/wait.h> and <stdlib.h>.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2010.  */
+
+static int
+test_sys_wait_macros (void)
+{
+  /* Check subset of <sys/wait.h> macros that must be visible here.
+     Note that some of these macros are only portable when operating
+     on an lvalue.  */
+  int i;
+  for (i = 0; i < 0x8000; i = (i ? i << 1 : 1))
+    {
+      /* POSIX requires that for all valid process statuses, that
+         exactly one of these three macros is true.  But not all
+         possible 16-bit values map to valid process status.
+         Traditionally, 8 of the bits are for WIFEXITED, 7 of the bits
+         to tell between WIFSIGNALED and WIFSTOPPED, and either 0x80
+         or 0x8000 to flag that core was also dumped.  Since we don't
+         know which byte is WIFEXITED, we skip the both possible bits
+         that can signal core dump.  */
+      if (i == 0x80)
+        continue;
+      if (!!WIFSIGNALED (i) + !!WIFEXITED (i) + !!WIFSTOPPED (i) != 1)
+        return 1;
+    }
+  i = WEXITSTATUS (i) + WSTOPSIG (i) + WTERMSIG (i);
+
+  switch (i)
+    {
+#if 0
+  /* Gnulib doesn't guarantee these, yet.  */
+    case WNOHANG:
+    case WUNTRACED:
+#endif
+      break;
+    }
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-thread_create.c b/src/grep/gnulib-tests/test-thread_create.c
new file mode 100644
index 0000000..f4213d4
--- /dev/null
+++ b/src/grep/gnulib-tests/test-thread_create.c
@@ -0,0 +1,78 @@
+/* Test of gl_thread_create () macro.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include "glthread/thread.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include "macros.h"
+
+static gl_thread_t main_thread_before;
+static gl_thread_t main_thread_after;
+static gl_thread_t worker_thread;
+
+static int dummy;
+static volatile int work_done;
+
+static void *
+worker_thread_func (void *arg)
+{
+  work_done = 1;
+  return &dummy;
+}
+
+int
+main ()
+{
+  main_thread_before = gl_thread_self ();
+
+  if (glthread_create (&worker_thread, worker_thread_func, NULL) == 0)
+    {
+      void *ret;
+
+      /* Check that gl_thread_self () has the same value before than after the
+         first call to gl_thread_create ().  */
+      main_thread_after = gl_thread_self ();
+      ASSERT (memcmp (&main_thread_before, &main_thread_after,
+                      sizeof (gl_thread_t))
+              == 0);
+
+      gl_thread_join (worker_thread, &ret);
+
+      /* Check the return value of the thread.  */
+      ASSERT (ret == &dummy);
+
+      /* Check that worker_thread_func () has finished executing.  */
+      ASSERT (work_done);
+
+      return 0;
+    }
+  else
+    {
+#if USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS
+      fputs ("glthread_create failed\n", stderr);
+      return 1;
+#else
+      fputs ("Skipping test: multithreading not enabled\n", stderr);
+      return 77;
+#endif
+    }
+}
diff --git a/src/grep/gnulib-tests/test-thread_self.c b/src/grep/gnulib-tests/test-thread_self.c
new file mode 100644
index 0000000..69d876d
--- /dev/null
+++ b/src/grep/gnulib-tests/test-thread_self.c
@@ -0,0 +1,39 @@
+/* Test of gl_thread_self () macro.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include "glthread/thread.h"
+
+gl_thread_t main_thread;
+
+int
+main ()
+{
+  /* Check that gl_thread_self () can be used with just $(LIBTHREAD), not
+     $(LIBMULTITHREAD), i.e. in libraries that are multithread-safe but don't
+     create threads themselves.  */
+  /* This is not the case on AIX with --enable-threads=isoc+posix, because in
+     this case, $(LIBTHREAD) is empty whereas $(LIBMULTITHREAD) is '-lpthread'.
+   */
+#if !defined _AIX
+  main_thread = gl_thread_self ();
+#endif
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-time.c b/src/grep/gnulib-tests/test-time.c
new file mode 100644
index 0000000..e5a4522
--- /dev/null
+++ b/src/grep/gnulib-tests/test-time.c
@@ -0,0 +1,45 @@
+/* Test of <time.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <time.h>
+
+#include "verify.h"
+
+/* Check that the types are all defined.  */
+struct timespec t1;
+#if 0
+/* POSIX:2008 does not require pid_t in <time.h> unconditionally, and indeed
+   it's missing on Mac OS X 10.5, FreeBSD 6.4, OpenBSD 4.9, mingw.  */
+pid_t t2;
+#endif
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
+/* Check that TIME_UTC is defined and a positive integer.  */
+int t3 = TIME_UTC;
+verify (TIME_UTC > 0);
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-unistd.c b/src/grep/gnulib-tests/test-unistd.c
new file mode 100644
index 0000000..ca7422c
--- /dev/null
+++ b/src/grep/gnulib-tests/test-unistd.c
@@ -0,0 +1,56 @@
+/* Test of <unistd.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "verify.h"
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
+/* Check that the various SEEK_* macros are defined.  */
+int sk[] = { SEEK_CUR, SEEK_END, SEEK_SET };
+
+/* Check that the various *_FILENO macros are defined.  */
+#if ! (defined STDIN_FILENO                                     \
+       && (STDIN_FILENO + STDOUT_FILENO + STDERR_FILENO == 3))
+missing or broken *_FILENO macros
+#endif
+
+/* Check that the types are all defined.  */
+size_t t1;
+ssize_t t2;
+#ifdef TODO /* Not implemented in gnulib yet */
+uid_t t3;
+gid_t t4;
+#endif
+off_t t5;
+pid_t t6;
+#ifdef TODO
+useconds_t t7;
+intptr_t t8;
+#endif
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-unsetenv.c b/src/grep/gnulib-tests/test-unsetenv.c
new file mode 100644
index 0000000..e61fbbc
--- /dev/null
+++ b/src/grep/gnulib-tests/test-unsetenv.c
@@ -0,0 +1,61 @@
+/* Tests of unsetenv.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <stdlib.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (unsetenv, int, (char const *));
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  char entry[] = "b=2";
+
+  /* Test removal when multiple entries present.  */
+  ASSERT (putenv ((char *) "a=1") == 0);
+  ASSERT (putenv (entry) == 0);
+  entry[0] = 'a'; /* Unspecified what getenv("a") would be at this point.  */
+  ASSERT (unsetenv ("a") == 0); /* Both entries will be removed.  */
+  ASSERT (getenv ("a") == NULL);
+  ASSERT (unsetenv ("a") == 0);
+
+  /* Required to fail with EINVAL.  */
+  errno = 0;
+  ASSERT (unsetenv ("") == -1);
+  ASSERT (errno == EINVAL);
+  errno = 0;
+  ASSERT (unsetenv ("a=b") == -1);
+  ASSERT (errno == EINVAL);
+#if 0
+  /* glibc and gnulib's implementation guarantee this, but POSIX no
+     longer requires it: http://austingroupbugs.net/view.php?id=185  */
+  errno = 0;
+  ASSERT (unsetenv (NULL) == -1);
+  ASSERT (errno == EINVAL);
+#endif
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-vasnprintf.c b/src/grep/gnulib-tests/test-vasnprintf.c
new file mode 100644
index 0000000..9d99743
--- /dev/null
+++ b/src/grep/gnulib-tests/test-vasnprintf.c
@@ -0,0 +1,121 @@
+/* Test of vasnprintf() and asnprintf() functions.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include "vasnprintf.h"
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+
+static void
+test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
+{
+  char buf[8];
+  int size;
+
+  for (size = 0; size <= 8; size++)
+    {
+      size_t length = size;
+      char *result = my_asnprintf (NULL, &length, "%d", 12345);
+      ASSERT (result != NULL);
+      ASSERT (strcmp (result, "12345") == 0);
+      ASSERT (length == 5);
+      free (result);
+    }
+
+  for (size = 0; size <= 8; size++)
+    {
+      size_t length;
+      char *result;
+
+      memcpy (buf, "DEADBEEF", 8);
+      length = size;
+      result = my_asnprintf (buf, &length, "%d", 12345);
+      ASSERT (result != NULL);
+      ASSERT (strcmp (result, "12345") == 0);
+      ASSERT (length == 5);
+      if (size < 5 + 1)
+        ASSERT (result != buf);
+      ASSERT (memcmp (buf + size, &"DEADBEEF"[size], 8 - size) == 0);
+      if (result != buf)
+        free (result);
+    }
+
+  /* Note: This test assumes IEEE 754 representation of 'double' floats.  */
+  for (size = 0; size <= 8; size++)
+    {
+      size_t length;
+      char *result;
+
+      memcpy (buf, "DEADBEEF", 8);
+      length = size;
+      result = my_asnprintf (buf, &length, "%2.0f", 1.6314159265358979e+125);
+      ASSERT (result != NULL);
+      /* The exact result and the result on glibc systems is
+         163141592653589790215729350939528493057529598899734151772468186268423257777068536614838678161083520756952076273094236944990208
+         On Cygwin, the result is
+         163141592653589790215729350939528493057529600000000000000000000000000000000000000000000000000000000000000000000000000000000000
+         On HP-UX 11.31 / hppa and IRIX 6.5, the result is
+         163141592653589790000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+       */
+      ASSERT (strlen (result) == 126);
+      ASSERT (memcmp (result, "163141592653589790", 18) == 0);
+      ASSERT (length == 126);
+      if (size < 126 + 1)
+        ASSERT (result != buf);
+      ASSERT (memcmp (buf + size, &"DEADBEEF"[size], 8 - size) == 0);
+      if (result != buf)
+        free (result);
+    }
+}
+
+static char *
+my_asnprintf (char *resultbuf, size_t *lengthp, const char *format, ...)
+{
+  va_list args;
+  char *ret;
+
+  va_start (args, format);
+  ret = vasnprintf (resultbuf, lengthp, format, args);
+  va_end (args);
+  return ret;
+}
+
+static void
+test_vasnprintf ()
+{
+  test_function (my_asnprintf);
+}
+
+static void
+test_asnprintf ()
+{
+  test_function (asnprintf);
+}
+
+int
+main (int argc, char *argv[])
+{
+  test_vasnprintf ();
+  test_asnprintf ();
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-vc-list-files-cvs.sh b/src/grep/gnulib-tests/test-vc-list-files-cvs.sh
new file mode 100755
index 0000000..3a7e1c5
--- /dev/null
+++ b/src/grep/gnulib-tests/test-vc-list-files-cvs.sh
@@ -0,0 +1,53 @@
+#!/bin/sh
+# Unit tests for vc-list-files
+# Copyright (C) 2008-2021 Free Software Foundation, Inc.
+# This file is part of the GNUlib Library.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+: ${srcdir=.}
+. "$srcdir/init.sh"; path_prepend_ .
+
+tmpdir=vc-cvs
+repo=`pwd`/$tmpdir/repo
+
+fail=0
+for i in with-cvsu without; do
+  # On the first iteration, test using cvsu, if it's in your path.
+  # On the second iteration, ensure that cvsu fails, so we'll
+  # exercise the awk-using code.
+  if test $i = without; then
+    printf '%s\n' '#!/bin/sh' 'exit 1' > cvsu
+    chmod a+x cvsu
+    PATH=`pwd`:$PATH
+    export PATH
+  fi
+  ok=0
+  mkdir $tmpdir && cd $tmpdir &&
+    # without cvs, skip the test
+    { ( cvs -Q -d "$repo" init ) > /dev/null 2>&1 \
+      || skip_ "cvs not found in PATH"; } &&
+    mkdir w && cd w &&
+    mkdir d &&
+    touch d/a b c &&
+    cvs -Q -d "$repo" import -m imp m M M0 &&
+    cvs -Q -d "$repo" co m && cd m &&
+    printf '%s\n' b c d/a > expected &&
+    $BOURNE_SHELL "$abs_aux_dir/vc-list-files" | sort > actual &&
+    compare expected actual &&
+    ok=1
+  test $ok = 0 && fail=1
+done
+
+Exit $fail
diff --git a/src/grep/gnulib-tests/test-vc-list-files-git.sh b/src/grep/gnulib-tests/test-vc-list-files-git.sh
new file mode 100755
index 0000000..3359ffb
--- /dev/null
+++ b/src/grep/gnulib-tests/test-vc-list-files-git.sh
@@ -0,0 +1,42 @@
+#!/bin/sh
+# Unit tests for vc-list-files
+# Copyright (C) 2008-2021 Free Software Foundation, Inc.
+# This file is part of the GNUlib Library.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+: ${srcdir=.}
+. "$srcdir/init.sh"; path_prepend_ .
+
+tmpdir=vc-git-$$
+GIT_DIR= GIT_WORK_TREE=; unset GIT_DIR GIT_WORK_TREE
+
+fail=1
+mkdir $tmpdir && cd $tmpdir &&
+  # without git, skip the test
+  # The double use of 'exit' is needed for the reference to $? inside the trap.
+  { ( git init -q ) > /dev/null 2>&1 \
+    || skip_ "git not found in PATH"; } &&
+  mkdir d &&
+  touch d/a b c &&
+  git config user.email "you@example.com" &&
+  git config user.name "Your Name" &&
+  git add . > /dev/null &&
+  git commit -q -a -m log &&
+  printf '%s\n' b c d/a > expected &&
+  $BOURNE_SHELL "$abs_aux_dir/vc-list-files" > actual &&
+  compare expected actual &&
+  fail=0
+
+Exit $fail
diff --git a/src/grep/gnulib-tests/test-verify-try.c b/src/grep/gnulib-tests/test-verify-try.c
new file mode 100644
index 0000000..e97ea2a
--- /dev/null
+++ b/src/grep/gnulib-tests/test-verify-try.c
@@ -0,0 +1,21 @@
+/* Test the "verify" module.
+
+   Copyright (C) 2017-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* This is a separate source file, so that the execution of test-verify.sh
+   does not interfere with the building of the 'test-verify' program.  */
+
+#include "test-verify.c"
diff --git a/src/grep/gnulib-tests/test-verify.c b/src/grep/gnulib-tests/test-verify.c
new file mode 100644
index 0000000..65b926a
--- /dev/null
+++ b/src/grep/gnulib-tests/test-verify.c
@@ -0,0 +1,119 @@
+/* Test the "verify" module.
+
+   Copyright (C) 2005, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible.  */
+
+#include <config.h>
+
+#include "verify.h"
+
+#ifndef EXP_FAIL
+# define EXP_FAIL 0
+#endif
+
+/* ======================= Test verify, verify_expr ======================= */
+
+int gx;
+enum { A, B, C };
+
+#if EXP_FAIL == 1
+verify (gx >= 0);                 /* should give ERROR: non-constant expression */
+#endif
+verify (C == 2);                  /* should be ok */
+#if EXP_FAIL == 2
+verify (1 + 1 == 3);              /* should give ERROR */
+#endif
+verify (1 == 1); verify (1 == 1); /* should be ok */
+
+enum
+{
+  item = verify_expr (1 == 1, 10 * 0 + 17) /* should be ok */
+};
+
+static int
+function (int n)
+{
+#if EXP_FAIL == 3
+  verify (n >= 0);                  /* should give ERROR: non-constant expression */
+#endif
+  verify (C == 2);                  /* should be ok */
+#if EXP_FAIL == 4
+  verify (1 + 1 == 3);              /* should give ERROR */
+#endif
+  verify (1 == 1); verify (1 == 1); /* should be ok */
+
+  if (n)
+    return ((void) verify_expr (1 == 1, 1), verify_expr (1 == 1, 8)); /* should be ok */
+#if EXP_FAIL == 5
+  return verify_expr (1 == 2, 5); /* should give ERROR */
+#endif
+  return 0;
+}
+
+/* ============================== Test assume ============================== */
+
+static int
+f (int a)
+{
+  return a;
+}
+
+typedef struct { unsigned int context : 4; unsigned int halt : 1; } state;
+
+void test_assume_expressions (state *s);
+int test_assume_optimization (int x);
+_Noreturn void test_assume_noreturn (void);
+
+void
+test_assume_expressions (state *s)
+{
+  /* Check that 'assume' accepts a function call, even of a non-const
+     function.  */
+  assume (f (1));
+  /* Check that 'assume' accepts a bit-field expression.  */
+  assume (s->halt);
+}
+
+int
+test_assume_optimization (int x)
+{
+  /* Check that the compiler uses 'assume' for optimization.
+     This function, when compiled with optimization, should have code
+     equivalent to
+       return x + 3;
+     Use 'objdump --disassemble test-verify.o' to verify this.  */
+  assume (x >= 4);
+  return (x > 1 ? x + 3 : 2 * x + 10);
+}
+
+_Noreturn void
+test_assume_noreturn (void)
+{
+  /* Check that the compiler's data-flow analysis recognizes 'assume (0)'.
+     This function should not elicit a warning.  */
+  assume (0);
+}
+
+/* ============================== Main ===================================== */
+int
+main (void)
+{
+  state s = { 0, 1 };
+  test_assume_expressions (&s);
+  test_assume_optimization (5);
+  return !(function (0) == 0 && function (1) == 8);
+}
diff --git a/src/grep/gnulib-tests/test-verify.sh b/src/grep/gnulib-tests/test-verify.sh
new file mode 100755
index 0000000..1e75d55
--- /dev/null
+++ b/src/grep/gnulib-tests/test-verify.sh
@@ -0,0 +1,25 @@
+#!/bin/sh
+. "${srcdir=.}/init.sh"
+
+# We are not interested in triggering bugs in the compilers and tools
+# (such as gcc 4.3.1 on openSUSE 11.0).
+unset MALLOC_PERTURB_
+
+# Rather than figure out how to invoke the compiler with the right
+# include path ourselves, we let make do it:
+(cd "$initial_cwd_" \
+ && rm -f test-verify-try.o \
+ && $MAKE test-verify-try.o >/dev/null 2>&1) \
+  || skip_ "cannot compile error-free"
+
+# Now, prove that we encounter all expected compilation failures:
+: >out
+: >err
+for i in 1 2 3 4 5; do
+  (cd "$initial_cwd_"
+   rm -f test-verify-try.o
+   $MAKE CFLAGS=-DEXP_FAIL=$i test-verify-try.o) >>out 2>>err \
+  && { warn_ "compiler didn't detect verification failure $i"; fail=1; }
+done
+
+Exit $fail
diff --git a/src/grep/gnulib-tests/test-version-etc.c b/src/grep/gnulib-tests/test-version-etc.c
new file mode 100644
index 0000000..a098556
--- /dev/null
+++ b/src/grep/gnulib-tests/test-version-etc.c
@@ -0,0 +1,31 @@
+/* Test suite for version-etc.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+   This file is part of the GNUlib Library.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "version-etc.h"
+
+
+#define AUTHORS "Sergey Poznyakoff", "Eric Blake"
+
+int
+main (int argc _GL_UNUSED, char **argv)
+{
+  version_etc (stdout, "test-version-etc", "dummy", "0", AUTHORS,
+               (const char *) NULL);
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-version-etc.sh b/src/grep/gnulib-tests/test-version-etc.sh
new file mode 100755
index 0000000..20b9e9b
--- /dev/null
+++ b/src/grep/gnulib-tests/test-version-etc.sh
@@ -0,0 +1,45 @@
+#! /bin/sh
+# Test suite for version-etc.
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+# This file is part of the GNUlib Library.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ .
+
+TMP=ve-expected.tmp
+LC_ALL=C
+export LC_ALL
+ERR=0
+
+cat > $TMP <<EOT
+test-version-etc (PROJECT) VERSION
+COPYRIGHT Free Software Foundation, Inc.
+License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
+
+Written by Sergey Poznyakoff and Eric Blake.
+EOT
+
+${CHECKER} test-version-etc${EXEEXT} --version |
+ sed '1s/test-version-etc (.*) .*/test-version-etc (PROJECT) VERSION/
+      /^Packaged by/d
+      2,3 s/Copyright (C) [0-9]\{4,4\}/COPYRIGHT/' |
+ tr -d '\015' |
+ compare $TMP - || ERR=1
+
+rm $TMP
+
+exit $ERR
diff --git a/src/grep/gnulib-tests/test-wchar.c b/src/grep/gnulib-tests/test-wchar.c
new file mode 100644
index 0000000..65c685c
--- /dev/null
+++ b/src/grep/gnulib-tests/test-wchar.c
@@ -0,0 +1,37 @@
+/* Test of <wchar.h> substitute.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <wchar.h>
+
+#include "verify.h"
+
+/* Check that the types wchar_t and wint_t are defined.  */
+wchar_t a = 'c';
+wint_t b = 'x';
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-wcrtomb-w32-1.sh b/src/grep/gnulib-tests/test-wcrtomb-w32-1.sh
new file mode 100755
index 0000000..b01c543
--- /dev/null
+++ b/src/grep/gnulib-tests/test-wcrtomb-w32-1.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+# Test a CP1252 locale.
+${CHECKER} ./test-wcrtomb-w32${EXEEXT} French_France 1252
diff --git a/src/grep/gnulib-tests/test-wcrtomb-w32-2.sh b/src/grep/gnulib-tests/test-wcrtomb-w32-2.sh
new file mode 100755
index 0000000..5481634
--- /dev/null
+++ b/src/grep/gnulib-tests/test-wcrtomb-w32-2.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+# Test a CP1256 locale.
+${CHECKER} ./test-wcrtomb-w32${EXEEXT} "Arabic_Saudi Arabia" 1256
diff --git a/src/grep/gnulib-tests/test-wcrtomb-w32-3.sh b/src/grep/gnulib-tests/test-wcrtomb-w32-3.sh
new file mode 100755
index 0000000..f35879d
--- /dev/null
+++ b/src/grep/gnulib-tests/test-wcrtomb-w32-3.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+# Test a CP932 locale.
+${CHECKER} ./test-wcrtomb-w32${EXEEXT} Japanese_Japan 932
diff --git a/src/grep/gnulib-tests/test-wcrtomb-w32-4.sh b/src/grep/gnulib-tests/test-wcrtomb-w32-4.sh
new file mode 100755
index 0000000..8eec6cb
--- /dev/null
+++ b/src/grep/gnulib-tests/test-wcrtomb-w32-4.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+# Test a CP950 locale.
+${CHECKER} ./test-wcrtomb-w32${EXEEXT} Chinese_Taiwan 950
diff --git a/src/grep/gnulib-tests/test-wcrtomb-w32-5.sh b/src/grep/gnulib-tests/test-wcrtomb-w32-5.sh
new file mode 100755
index 0000000..fd47d6f
--- /dev/null
+++ b/src/grep/gnulib-tests/test-wcrtomb-w32-5.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+# Test a CP936 locale.
+${CHECKER} ./test-wcrtomb-w32${EXEEXT} Chinese_China 936
diff --git a/src/grep/gnulib-tests/test-wcrtomb-w32-6.sh b/src/grep/gnulib-tests/test-wcrtomb-w32-6.sh
new file mode 100755
index 0000000..802237d
--- /dev/null
+++ b/src/grep/gnulib-tests/test-wcrtomb-w32-6.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+# Test a GB18030 locale.
+${CHECKER} ./test-wcrtomb-w32${EXEEXT} Chinese_China 54936
diff --git a/src/grep/gnulib-tests/test-wcrtomb-w32-7.sh b/src/grep/gnulib-tests/test-wcrtomb-w32-7.sh
new file mode 100755
index 0000000..fb04e58
--- /dev/null
+++ b/src/grep/gnulib-tests/test-wcrtomb-w32-7.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+# Test some UTF-8 locales.
+${CHECKER} ./test-wcrtomb-w32${EXEEXT} French_France Japanese_Japan Chinese_Taiwan Chinese_China 65001
diff --git a/src/grep/gnulib-tests/test-wcrtomb-w32.c b/src/grep/gnulib-tests/test-wcrtomb-w32.c
new file mode 100644
index 0000000..b354260
--- /dev/null
+++ b/src/grep/gnulib-tests/test-wcrtomb-w32.c
@@ -0,0 +1,337 @@
+/* Test of conversion of wide character to multibyte character.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <wchar.h>
+
+#include <locale.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "localcharset.h"
+#include "macros.h"
+
+#if defined _WIN32 && !defined __CYGWIN__
+
+static int
+test_one_locale (const char *name, int codepage)
+{
+  char buf[64];
+  size_t ret;
+
+# if 1
+  /* Portable code to set the locale.  */
+  {
+    char name_with_codepage[1024];
+
+    sprintf (name_with_codepage, "%s.%d", name, codepage);
+
+    /* Set the locale.  */
+    if (setlocale (LC_ALL, name_with_codepage) == NULL)
+      return 77;
+  }
+# else
+  /* Hacky way to set a locale.codepage combination that setlocale() refuses
+     to set.  */
+  {
+    /* Codepage of the current locale, set with setlocale().
+       Not necessarily the same as GetACP().  */
+    extern __declspec(dllimport) unsigned int __lc_codepage;
+
+    /* Set the locale.  */
+    if (setlocale (LC_ALL, name) == NULL)
+      return 77;
+
+    /* Clobber the codepage and MB_CUR_MAX, both set by setlocale().  */
+    __lc_codepage = codepage;
+    switch (codepage)
+      {
+      case 1252:
+      case 1256:
+        MB_CUR_MAX = 1;
+        break;
+      case 932:
+      case 950:
+      case 936:
+        MB_CUR_MAX = 2;
+        break;
+      case 54936:
+      case 65001:
+        MB_CUR_MAX = 4;
+        break;
+      }
+
+    /* Test whether the codepage is really available.  */
+    {
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, " ", 1, &state) == (size_t)(-1))
+        return 77;
+    }
+  }
+# endif
+
+  /* Test NUL character.  */
+  {
+    buf[0] = 'x';
+    ret = wcrtomb (buf, 0, NULL);
+    ASSERT (ret == 1);
+    ASSERT (buf[0] == '\0');
+  }
+
+  /* Test single bytes.  */
+  {
+    int c;
+
+    for (c = 0; c < 0x100; c++)
+      switch (c)
+        {
+        case '\t': case '\v': case '\f':
+        case ' ': case '!': case '"': case '#': case '%':
+        case '&': case '\'': case '(': case ')': case '*':
+        case '+': case ',': case '-': case '.': case '/':
+        case '0': case '1': case '2': case '3': case '4':
+        case '5': case '6': case '7': case '8': case '9':
+        case ':': case ';': case '<': case '=': case '>':
+        case '?':
+        case 'A': case 'B': case 'C': case 'D': case 'E':
+        case 'F': case 'G': case 'H': case 'I': case 'J':
+        case 'K': case 'L': case 'M': case 'N': case 'O':
+        case 'P': case 'Q': case 'R': case 'S': case 'T':
+        case 'U': case 'V': case 'W': case 'X': case 'Y':
+        case 'Z':
+        case '[': case '\\': case ']': case '^': case '_':
+        case 'a': case 'b': case 'c': case 'd': case 'e':
+        case 'f': case 'g': case 'h': case 'i': case 'j':
+        case 'k': case 'l': case 'm': case 'n': case 'o':
+        case 'p': case 'q': case 'r': case 's': case 't':
+        case 'u': case 'v': case 'w': case 'x': case 'y':
+        case 'z': case '{': case '|': case '}': case '~':
+          /* c is in the ISO C "basic character set".  */
+          ret = wcrtomb (buf, btowc (c), NULL);
+          ASSERT (ret == 1);
+          ASSERT (buf[0] == (char) c);
+          break;
+        }
+  }
+
+  /* Test special calling convention, passing a NULL pointer.  */
+  {
+    ret = wcrtomb (NULL, '\0', NULL);
+    ASSERT (ret == 1);
+    ret = wcrtomb (NULL, btowc ('x'), NULL);
+    ASSERT (ret == 1);
+  }
+
+  switch (codepage)
+    {
+    case 1252:
+      /* Locale encoding is CP1252, an extension of ISO-8859-1.  */
+      {
+        /* Convert "B\374\337er": "Büßer" */
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x00FC, NULL);
+        ASSERT (ret == 1);
+        ASSERT (memcmp (buf, "\374", 1) == 0);
+        ASSERT (buf[1] == 'x');
+
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x00DF, NULL);
+        ASSERT (ret == 1);
+        ASSERT (memcmp (buf, "\337", 1) == 0);
+        ASSERT (buf[1] == 'x');
+      }
+      return 0;
+
+    case 1256:
+      /* Locale encoding is CP1256, not the same as ISO-8859-6.  */
+      {
+        /* Convert "x\302\341\346y": "xآلوy" */
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x0622, NULL);
+        ASSERT (ret == 1);
+        ASSERT (memcmp (buf, "\302", 1) == 0);
+        ASSERT (buf[1] == 'x');
+
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x0644, NULL);
+        ASSERT (ret == 1);
+        ASSERT (memcmp (buf, "\341", 1) == 0);
+        ASSERT (buf[1] == 'x');
+
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x0648, NULL);
+        ASSERT (ret == 1);
+        ASSERT (memcmp (buf, "\346", 1) == 0);
+        ASSERT (buf[1] == 'x');
+      }
+      return 0;
+
+    case 932:
+      /* Locale encoding is CP932, similar to Shift_JIS.  */
+      {
+        /* Convert "<\223\372\226\173\214\352>": "<日本語>" */
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x65E5, NULL);
+        ASSERT (ret == 2);
+        ASSERT (memcmp (buf, "\223\372", 2) == 0);
+        ASSERT (buf[2] == 'x');
+
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x672C, NULL);
+        ASSERT (ret == 2);
+        ASSERT (memcmp (buf, "\226\173", 2) == 0);
+        ASSERT (buf[2] == 'x');
+
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x8A9E, NULL);
+        ASSERT (ret == 2);
+        ASSERT (memcmp (buf, "\214\352", 2) == 0);
+        ASSERT (buf[2] == 'x');
+      }
+      return 0;
+
+    case 950:
+      /* Locale encoding is CP950, similar to Big5.  */
+      {
+        /* Convert "<\244\351\245\273\273\171>": "<日本語>" */
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x65E5, NULL);
+        ASSERT (ret == 2);
+        ASSERT (memcmp (buf, "\244\351", 2) == 0);
+        ASSERT (buf[2] == 'x');
+
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x672C, NULL);
+        ASSERT (ret == 2);
+        ASSERT (memcmp (buf, "\245\273", 2) == 0);
+        ASSERT (buf[2] == 'x');
+
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x8A9E, NULL);
+        ASSERT (ret == 2);
+        ASSERT (memcmp (buf, "\273\171", 2) == 0);
+        ASSERT (buf[2] == 'x');
+      }
+      return 0;
+
+    case 936:
+      /* Locale encoding is CP936 = GBK, an extension of GB2312.  */
+      {
+        /* Convert "<\310\325\261\276\325\132>": "<日本語>" */
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x65E5, NULL);
+        ASSERT (ret == 2);
+        ASSERT (memcmp (buf, "\310\325", 2) == 0);
+        ASSERT (buf[2] == 'x');
+
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x672C, NULL);
+        ASSERT (ret == 2);
+        ASSERT (memcmp (buf, "\261\276", 2) == 0);
+        ASSERT (buf[2] == 'x');
+
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x8A9E, NULL);
+        ASSERT (ret == 2);
+        ASSERT (memcmp (buf, "\325\132", 2) == 0);
+        ASSERT (buf[2] == 'x');
+      }
+      return 0;
+
+    case 54936:
+      /* Locale encoding is CP54936 = GB18030.  */
+      if (strcmp (locale_charset (), "GB18030") != 0)
+        return 77;
+      {
+        /* Convert "B\250\271\201\060\211\070er": "Büßer" */
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x00FC, NULL);
+        ASSERT (ret == 2);
+        ASSERT (memcmp (buf, "\250\271", 2) == 0);
+        ASSERT (buf[2] == 'x');
+
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x00DF, NULL);
+        ASSERT (ret == 4);
+        ASSERT (memcmp (buf, "\201\060\211\070", 4) == 0);
+        ASSERT (buf[4] == 'x');
+      }
+      return 0;
+
+    case 65001:
+      /* Locale encoding is CP65001 = UTF-8.  */
+      if (strcmp (locale_charset (), "UTF-8") != 0)
+        return 77;
+      {
+        /* Convert "B\303\274\303\237er": "Büßer" */
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x00FC, NULL);
+        ASSERT (ret == 2);
+        ASSERT (memcmp (buf, "\303\274", 2) == 0);
+        ASSERT (buf[2] == 'x');
+
+        memset (buf, 'x', 8);
+        ret = wcrtomb (buf, 0x00DF, NULL);
+        ASSERT (ret == 2);
+        ASSERT (memcmp (buf, "\303\237", 2) == 0);
+        ASSERT (buf[2] == 'x');
+      }
+      return 0;
+
+    default:
+      return 1;
+    }
+}
+
+int
+main (int argc, char *argv[])
+{
+  int codepage = atoi (argv[argc - 1]);
+  int result;
+  int i;
+
+  result = 77;
+  for (i = 1; i < argc - 1; i++)
+    {
+      int ret = test_one_locale (argv[i], codepage);
+
+      if (ret != 77)
+        result = ret;
+    }
+
+  if (result == 77)
+    {
+      fprintf (stderr, "Skipping test: found no locale with codepage %d\n",
+               codepage);
+    }
+  return result;
+}
+
+#else
+
+int
+main (int argc, char *argv[])
+{
+  fputs ("Skipping test: not a native Windows system\n", stderr);
+  return 77;
+}
+
+#endif
diff --git a/src/grep/gnulib-tests/test-wcrtomb.c b/src/grep/gnulib-tests/test-wcrtomb.c
new file mode 100644
index 0000000..74f2d1d
--- /dev/null
+++ b/src/grep/gnulib-tests/test-wcrtomb.c
@@ -0,0 +1,166 @@
+/* Test of conversion of wide character to multibyte character.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include <wchar.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (wcrtomb, size_t, (char *, wchar_t, mbstate_t *));
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+
+/* Check the multibyte character s[0..n-1].  */
+static void
+check_character (const char *s, size_t n)
+{
+  wchar_t wc;
+  char buf[64];
+  int iret;
+  size_t ret;
+
+  wc = (wchar_t) 0xBADFACE;
+  iret = mbtowc (&wc, s, n);
+  ASSERT (iret == n);
+
+  ret = wcrtomb (buf, wc, NULL);
+  ASSERT (ret == n);
+  ASSERT (memcmp (buf, s, n) == 0);
+
+  /* Test special calling convention, passing a NULL pointer.  */
+  ret = wcrtomb (NULL, wc, NULL);
+  ASSERT (ret == 1);
+}
+
+int
+main (int argc, char *argv[])
+{
+  char buf[64];
+  size_t ret;
+
+  /* configure should already have checked that the locale is supported.  */
+  if (setlocale (LC_ALL, "") == NULL)
+    return 1;
+
+  /* Test NUL character.  */
+  {
+    buf[0] = 'x';
+    ret = wcrtomb (buf, 0, NULL);
+    ASSERT (ret == 1);
+    ASSERT (buf[0] == '\0');
+  }
+
+  /* Test single bytes.  */
+  {
+    int c;
+
+    for (c = 0; c < 0x100; c++)
+      switch (c)
+        {
+        case '\t': case '\v': case '\f':
+        case ' ': case '!': case '"': case '#': case '%':
+        case '&': case '\'': case '(': case ')': case '*':
+        case '+': case ',': case '-': case '.': case '/':
+        case '0': case '1': case '2': case '3': case '4':
+        case '5': case '6': case '7': case '8': case '9':
+        case ':': case ';': case '<': case '=': case '>':
+        case '?':
+        case 'A': case 'B': case 'C': case 'D': case 'E':
+        case 'F': case 'G': case 'H': case 'I': case 'J':
+        case 'K': case 'L': case 'M': case 'N': case 'O':
+        case 'P': case 'Q': case 'R': case 'S': case 'T':
+        case 'U': case 'V': case 'W': case 'X': case 'Y':
+        case 'Z':
+        case '[': case '\\': case ']': case '^': case '_':
+        case 'a': case 'b': case 'c': case 'd': case 'e':
+        case 'f': case 'g': case 'h': case 'i': case 'j':
+        case 'k': case 'l': case 'm': case 'n': case 'o':
+        case 'p': case 'q': case 'r': case 's': case 't':
+        case 'u': case 'v': case 'w': case 'x': case 'y':
+        case 'z': case '{': case '|': case '}': case '~':
+          /* c is in the ISO C "basic character set".  */
+          ret = wcrtomb (buf, btowc (c), NULL);
+          ASSERT (ret == 1);
+          ASSERT (buf[0] == (char) c);
+          break;
+        }
+  }
+
+  /* Test special calling convention, passing a NULL pointer.  */
+  {
+    ret = wcrtomb (NULL, '\0', NULL);
+    ASSERT (ret == 1);
+    ret = wcrtomb (NULL, btowc ('x'), NULL);
+    ASSERT (ret == 1);
+  }
+
+  if (argc > 1)
+    switch (argv[1][0])
+      {
+      case '1':
+        /* Locale encoding is ISO-8859-1 or ISO-8859-15.  */
+        {
+          const char input[] = "B\374\337er"; /* "Büßer" */
+
+          check_character (input + 1, 1);
+          check_character (input + 2, 1);
+        }
+        return 0;
+
+      case '2':
+        /* Locale encoding is UTF-8.  */
+        {
+          const char input[] = "B\303\274\303\237er"; /* "Büßer" */
+
+          check_character (input + 1, 2);
+          check_character (input + 3, 2);
+        }
+        return 0;
+
+      case '3':
+        /* Locale encoding is EUC-JP.  */
+        {
+          const char input[] = "<\306\374\313\334\270\354>"; /* "<日本語>" */
+
+          check_character (input + 1, 2);
+          check_character (input + 3, 2);
+          check_character (input + 5, 2);
+        }
+        return 0;
+
+      case '4':
+        /* Locale encoding is GB18030.  */
+        {
+          const char input[] = "B\250\271\201\060\211\070er"; /* "Büßer" */
+
+          check_character (input + 1, 2);
+          check_character (input + 3, 4);
+        }
+        return 0;
+
+      case '5':
+        /* C locale; tested above.  */
+        return 0;
+      }
+
+  return 1;
+}
diff --git a/src/grep/gnulib-tests/test-wcrtomb.sh b/src/grep/gnulib-tests/test-wcrtomb.sh
new file mode 100755
index 0000000..1a31b6e
--- /dev/null
+++ b/src/grep/gnulib-tests/test-wcrtomb.sh
@@ -0,0 +1,39 @@
+#!/bin/sh
+
+# Test in an ISO-8859-1 or ISO-8859-15 locale.
+: ${LOCALE_FR=fr_FR}
+if test $LOCALE_FR != none; then
+  LC_ALL=$LOCALE_FR \
+  ${CHECKER} ./test-wcrtomb${EXEEXT} 1 \
+  || exit 1
+fi
+
+# Test whether a specific UTF-8 locale is installed.
+: ${LOCALE_FR_UTF8=fr_FR.UTF-8}
+if test $LOCALE_FR_UTF8 != none; then
+  LC_ALL=$LOCALE_FR_UTF8 \
+  ${CHECKER} ./test-wcrtomb${EXEEXT} 2 \
+  || exit 1
+fi
+
+# Test whether a specific EUC-JP locale is installed.
+: ${LOCALE_JA=ja_JP}
+if test $LOCALE_JA != none; then
+  LC_ALL=$LOCALE_JA \
+  ${CHECKER} ./test-wcrtomb${EXEEXT} 3 \
+  || exit 1
+fi
+
+# Test whether a specific GB18030 locale is installed.
+: ${LOCALE_ZH_CN=zh_CN.GB18030}
+if test $LOCALE_ZH_CN != none; then
+  LC_ALL=$LOCALE_ZH_CN \
+  ${CHECKER} ./test-wcrtomb${EXEEXT} 4 \
+  || exit 1
+fi
+
+# Test in the POSIX locale.
+LC_ALL=C     ${CHECKER} ./test-wcrtomb${EXEEXT} 5 || exit 1
+LC_ALL=POSIX ${CHECKER} ./test-wcrtomb${EXEEXT} 5 || exit 1
+
+exit 0
diff --git a/src/grep/gnulib-tests/test-wctype-h.c b/src/grep/gnulib-tests/test-wctype-h.c
new file mode 100644
index 0000000..f96c73d
--- /dev/null
+++ b/src/grep/gnulib-tests/test-wctype-h.c
@@ -0,0 +1,74 @@
+/* Test of <wctype.h> substitute.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <wctype.h>
+
+#include "macros.h"
+
+/* Check that the type wint_t is defined.  */
+wint_t a = 'x';
+/* Check that WEOF is defined.  */
+wint_t e = WEOF;
+
+/* Check that the type wctype_t is defined.  */
+wctype_t p;
+
+/* Check that the type wctrans_t is defined.  */
+wctrans_t q;
+
+int
+main (void)
+{
+  /* Check that the isw* functions exist as functions or as macros.  */
+  (void) iswalnum (0);
+  (void) iswalpha (0);
+  (void) iswcntrl (0);
+  (void) iswdigit (0);
+  (void) iswgraph (0);
+  (void) iswlower (0);
+  (void) iswprint (0);
+  (void) iswpunct (0);
+  (void) iswspace (0);
+  (void) iswupper (0);
+  (void) iswxdigit (0);
+
+  /* Check that the isw* functions map WEOF to 0.  */
+  ASSERT (!iswalnum (e));
+  ASSERT (!iswalpha (e));
+  ASSERT (!iswcntrl (e));
+  ASSERT (!iswdigit (e));
+  ASSERT (!iswgraph (e));
+  ASSERT (!iswlower (e));
+  ASSERT (!iswprint (e));
+  ASSERT (!iswpunct (e));
+  ASSERT (!iswspace (e));
+  ASSERT (!iswupper (e));
+  ASSERT (!iswxdigit (e));
+
+  /* Check that the tow* functions exist as functions or as macros.  */
+  (void) towlower (0);
+  (void) towupper (0);
+
+  /* Check that the tow* functions map WEOF to WEOF.  */
+  ASSERT (towlower (e) == e);
+  ASSERT (towupper (e) == e);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-wcwidth.c b/src/grep/gnulib-tests/test-wcwidth.c
new file mode 100644
index 0000000..e5e3a54
--- /dev/null
+++ b/src/grep/gnulib-tests/test-wcwidth.c
@@ -0,0 +1,106 @@
+/* Test of wcwidth() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <wchar.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (wcwidth, int, (wchar_t));
+
+#include <locale.h>
+#include <string.h>
+
+#include "c-ctype.h"
+#include "localcharset.h"
+#include "macros.h"
+
+int
+main ()
+{
+  wchar_t wc;
+
+#if !GNULIB_WCHAR_SINGLE_LOCALE
+# ifdef C_CTYPE_ASCII
+  /* Test width of ASCII characters.  */
+  for (wc = 0x20; wc < 0x7F; wc++)
+    ASSERT (wcwidth (wc) == 1);
+# endif
+#endif
+
+  /* Switch to an UTF-8 locale.  */
+  if (setlocale (LC_ALL, "fr_FR.UTF-8") != NULL
+      /* Check whether it's really an UTF-8 locale.
+         On OpenBSD 4.0, the setlocale call succeeds only for the LC_CTYPE
+         category and therefore returns "C/fr_FR.UTF-8/C/C/C/C", but the
+         LC_CTYPE category is effectively set to an ASCII LC_CTYPE category;
+         in particular, locale_charset() returns "ASCII".  */
+      && strcmp (locale_charset (), "UTF-8") == 0)
+    {
+      /* Test width of ASCII characters.  */
+      for (wc = 0x20; wc < 0x7F; wc++)
+        ASSERT (wcwidth (wc) == 1);
+
+      /* Test width of some non-spacing characters.  */
+      ASSERT (wcwidth (0x0301) == 0);
+      ASSERT (wcwidth (0x05B0) == 0);
+
+      /* Test width of some format control characters.  */
+      ASSERT (wcwidth (0x200E) <= 0);
+      ASSERT (wcwidth (0x2060) <= 0);
+#if 0  /* wchar_t may be only 16 bits.  */
+      ASSERT (wcwidth (0xE0001) <= 0);
+      ASSERT (wcwidth (0xE0044) <= 0);
+#endif
+
+      /* Test width of some zero width characters.  */
+      /* While it is desirable that U+200B, U+200C, U+200D have width 0,
+         because this makes wcswidth work better on strings that contain these
+         characters, it is acceptable if an implementation treats these
+         characters like control characters.  */
+      ASSERT (wcwidth (0x200B) <= 0);
+      ASSERT (wcwidth (0xFEFF) <= 0);
+
+      /* Test width of some math symbols.
+         U+2202 is marked as having ambiguous width (A) in EastAsianWidth.txt
+         (see <https://www.unicode.org/Public/12.0.0/ucd/EastAsianWidth.txt>).
+         The Unicode Standard Annex 11
+         <https://www.unicode.org/reports/tr11/tr11-36.html>
+         says
+           "Ambiguous characters behave like wide or narrow characters
+            depending on the context (language tag, script identification,
+            associated font, source of data, or explicit markup; all can
+            provide the context). If the context cannot be established
+            reliably, they should be treated as narrow characters by default."
+         For wcwidth(), the only available context information is the locale.
+         "fr_FR.UTF-8" is a Western locale, not an East Asian locale, therefore
+         U+2202 should be treated like a narrow character.  */
+      ASSERT (wcwidth (0x2202) == 1);
+
+      /* Test width of some CJK characters.  */
+      ASSERT (wcwidth (0x3000) == 2);
+      ASSERT (wcwidth (0xB250) == 2);
+      ASSERT (wcwidth (0xFF1A) == 2);
+#if 0  /* wchar_t may be only 16 bits.  */
+      ASSERT (wcwidth (0x20369) == 2);
+      ASSERT (wcwidth (0x2F876) == 2);
+#endif
+    }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-xalloc-die.c b/src/grep/gnulib-tests/test-xalloc-die.c
new file mode 100644
index 0000000..3da598b
--- /dev/null
+++ b/src/grep/gnulib-tests/test-xalloc-die.c
@@ -0,0 +1,28 @@
+/* Test of xalloc_die() function.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Simon Josefsson <simon@josefsson.org>, 2009.  */
+
+#include <config.h>
+
+#include "xalloc.h"
+
+int
+main (int argc _GL_UNUSED, char **argv)
+{
+  xalloc_die ();
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/test-xalloc-die.sh b/src/grep/gnulib-tests/test-xalloc-die.sh
new file mode 100755
index 0000000..b88d959
--- /dev/null
+++ b/src/grep/gnulib-tests/test-xalloc-die.sh
@@ -0,0 +1,36 @@
+#!/bin/sh
+# Test suite for xalloc_die.
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+# This file is part of the GNUlib Library.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ .
+
+${CHECKER} test-xalloc-die${EXEEXT} > out 2> err
+case $? in
+  1) ;;
+  *) Exit 1;;
+esac
+
+tr -d '\015' < err \
+  | sed 's,.*test-xalloc-die[.ex]*:,test-xalloc-die:,' > err2 || Exit 1
+
+compare - err2 <<\EOF || Exit 1
+test-xalloc-die: memory exhausted
+EOF
+
+test -s out && Exit 1
+
+Exit $fail
diff --git a/src/grep/gnulib-tests/test-xstrtoimax.c b/src/grep/gnulib-tests/test-xstrtoimax.c
new file mode 100644
index 0000000..cc2f6ae
--- /dev/null
+++ b/src/grep/gnulib-tests/test-xstrtoimax.c
@@ -0,0 +1,4 @@
+#define __xstrtol xstrtoimax
+#define __strtol_t intmax_t
+#define __spec PRIdMAX
+#include "test-xstrtol.c"
diff --git a/src/grep/gnulib-tests/test-xstrtoimax.sh b/src/grep/gnulib-tests/test-xstrtoimax.sh
new file mode 100755
index 0000000..6a48e67
--- /dev/null
+++ b/src/grep/gnulib-tests/test-xstrtoimax.sh
@@ -0,0 +1,46 @@
+#!/bin/sh
+: ${srcdir=.}
+. "$srcdir/init.sh"; path_prepend_ .
+
+too_big=99999999999999999999999999999999999999999999999999999999999999999999
+result=0
+
+# test xstrtoimax
+${CHECKER} test-xstrtoimax 1 >> out 2>&1 || result=1
+${CHECKER} test-xstrtoimax -1 >> out 2>&1 || result=1
+${CHECKER} test-xstrtoimax 1k >> out 2>&1 || result=1
+${CHECKER} test-xstrtoimax ${too_big}h >> out 2>&1 && result=1
+${CHECKER} test-xstrtoimax $too_big >> out 2>&1 && result=1
+${CHECKER} test-xstrtoimax x >> out 2>&1 && result=1
+${CHECKER} test-xstrtoimax 9x >> out 2>&1 && result=1
+${CHECKER} test-xstrtoimax 010 >> out 2>&1 || result=1
+${CHECKER} test-xstrtoimax MiB >> out 2>&1 || result=1
+
+# Find out how to remove carriage returns from output. Solaris /usr/ucb/tr
+# does not understand '\r'.
+if echo solaris | tr -d '\r' | grep solais > /dev/null; then
+  cr='\015'
+else
+  cr='\r'
+fi
+
+# normalize output
+LC_ALL=C tr -d "$cr" < out > k
+mv k out
+
+# compare expected output
+cat > exp <<EOF
+1->1 ()
+-1->-1 ()
+1k->1024 ()
+invalid suffix in X argument '${too_big}h'
+X argument '$too_big' too large
+invalid X argument 'x'
+invalid suffix in X argument '9x'
+010->8 ()
+MiB->1048576 ()
+EOF
+
+compare exp out || result=1
+
+Exit $result
diff --git a/src/grep/gnulib-tests/test-xstrtol.c b/src/grep/gnulib-tests/test-xstrtol.c
new file mode 100644
index 0000000..f07a1f4
--- /dev/null
+++ b/src/grep/gnulib-tests/test-xstrtol.c
@@ -0,0 +1,62 @@
+/* Test of xstrtol module.
+   Copyright (C) 1995-1996, 1998-2001, 2003-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <inttypes.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "xstrtol-error.h"
+#include "error.h"
+
+#ifndef __xstrtol
+# define __xstrtol xstrtol
+# define __strtol_t long int
+# define __spec "ld"
+#endif
+
+/* Don't show the program name in error messages.  */
+static void
+print_no_progname (void)
+{
+}
+
+int
+main (int argc, char **argv)
+{
+  strtol_error s_err;
+  int i;
+
+  error_print_progname = print_no_progname;
+
+  for (i = 1; i < argc; i++)
+    {
+      char *p;
+      __strtol_t val;
+
+      s_err = __xstrtol (argv[i], &p, 0, &val, "bckMw0");
+      if (s_err == LONGINT_OK)
+        {
+          printf ("%s->%" __spec " (%s)\n", argv[i], val, p);
+        }
+      else
+        {
+          xstrtol_fatal (s_err, -2, 'X', NULL, argv[i]);
+        }
+    }
+  exit (0);
+}
diff --git a/src/grep/gnulib-tests/test-xstrtol.sh b/src/grep/gnulib-tests/test-xstrtol.sh
new file mode 100755
index 0000000..15dd911
--- /dev/null
+++ b/src/grep/gnulib-tests/test-xstrtol.sh
@@ -0,0 +1,71 @@
+#!/bin/sh
+: ${srcdir=.}
+. "$srcdir/init.sh"; path_prepend_ .
+
+too_big=99999999999999999999999999999999999999999999999999999999999999999999
+result=0
+
+# test xstrtol
+${CHECKER} test-xstrtol 1 >> out 2>&1 || result=1
+${CHECKER} test-xstrtol -1 >> out 2>&1 || result=1
+${CHECKER} test-xstrtol 1k >> out 2>&1 || result=1
+${CHECKER} test-xstrtol ${too_big}h >> out 2>&1 && result=1
+${CHECKER} test-xstrtol $too_big >> out 2>&1 && result=1
+${CHECKER} test-xstrtol x >> out 2>&1 && result=1
+${CHECKER} test-xstrtol 9x >> out 2>&1 && result=1
+${CHECKER} test-xstrtol 010 >> out 2>&1 || result=1
+# suffix without integer is valid
+${CHECKER} test-xstrtol MiB >> out 2>&1 || result=1
+${CHECKER} test-xstrtol 1bB >> out 2>&1 && result=1
+
+# test xstrtoul
+${CHECKER} test-xstrtoul 1 >> out 2>&1 || result=1
+${CHECKER} test-xstrtoul -1 >> out 2>&1 && result=1
+${CHECKER} test-xstrtoul 1k >> out 2>&1 || result=1
+${CHECKER} test-xstrtoul ${too_big}h >> out 2>&1 && result=1
+${CHECKER} test-xstrtoul $too_big >> out 2>&1 && result=1
+${CHECKER} test-xstrtoul x >> out 2>&1 && result=1
+${CHECKER} test-xstrtoul 9x >> out 2>&1 && result=1
+${CHECKER} test-xstrtoul 010 >> out 2>&1 || result=1
+${CHECKER} test-xstrtoul MiB >> out 2>&1 || result=1
+${CHECKER} test-xstrtoul 1bB >> out 2>&1 && result=1
+
+# Find out how to remove carriage returns from output. Solaris /usr/ucb/tr
+# does not understand '\r'.
+if echo solaris | tr -d '\r' | grep solais > /dev/null; then
+  cr='\015'
+else
+  cr='\r'
+fi
+
+# normalize output
+LC_ALL=C tr -d "$cr" < out > k
+mv k out
+
+# compare expected output
+cat > expected <<EOF
+1->1 ()
+-1->-1 ()
+1k->1024 ()
+invalid suffix in X argument '${too_big}h'
+X argument '$too_big' too large
+invalid X argument 'x'
+invalid suffix in X argument '9x'
+010->8 ()
+MiB->1048576 ()
+invalid suffix in X argument '1bB'
+1->1 ()
+invalid X argument '-1'
+1k->1024 ()
+invalid suffix in X argument '${too_big}h'
+X argument '$too_big' too large
+invalid X argument 'x'
+invalid suffix in X argument '9x'
+010->8 ()
+MiB->1048576 ()
+invalid suffix in X argument '1bB'
+EOF
+
+compare expected out || result=1
+
+Exit $result
diff --git a/src/grep/gnulib-tests/test-xstrtoul.c b/src/grep/gnulib-tests/test-xstrtoul.c
new file mode 100644
index 0000000..9dda9ee
--- /dev/null
+++ b/src/grep/gnulib-tests/test-xstrtoul.c
@@ -0,0 +1,4 @@
+#define __xstrtol xstrtoul
+#define __strtol_t unsigned long int
+#define __spec "lu"
+#include "test-xstrtol.c"
diff --git a/src/grep/gnulib-tests/thread-optim.h b/src/grep/gnulib-tests/thread-optim.h
new file mode 100644
index 0000000..0a4ba16
--- /dev/null
+++ b/src/grep/gnulib-tests/thread-optim.h
@@ -0,0 +1,60 @@
+/* Optimization of multithreaded code.
+
+   Copyright (C) 2020-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2020.  */
+
+#ifndef _THREAD_OPTIM_H
+#define _THREAD_OPTIM_H
+
+/* This file defines a way to optimize multithreaded code for the single-thread
+   case, based on the variable '__libc_single_threaded', defined in
+   glibc >= 2.32.  */
+
+/* Typical use: In a block or function, use
+
+     bool mt = gl_multithreaded ();
+     ...
+     if (mt)
+       if (pthread_mutex_lock (&lock)) abort ();
+     ...
+     if (mt)
+       if (pthread_mutex_unlock (&lock)) abort ();
+
+   The gl_multithreaded () invocation determines whether the program currently
+   is multithreaded.
+
+   if (mt) STATEMENT executes STATEMENT in the multithreaded case, and skips
+   it in the single-threaded case.
+
+   The code between the gl_multithreaded () invocation and any use of the
+   variable 'mt' must not create threads or invoke functions that may
+   indirectly create threads (e.g. 'dlopen' may, indirectly through C++
+   initializers of global variables in the shared library being opened,
+   create threads).
+
+   The lock here is meant to synchronize threads in the same process.  The
+   same optimization cannot be applied to locks that synchronize different
+   processes (e.g. through shared memory mappings).  */
+
+#if HAVE_SYS_SINGLE_THREADED_H /* glibc >= 2.32 */
+# include <sys/single_threaded.h>
+# define gl_multithreaded()  !__libc_single_threaded
+#else
+# define gl_multithreaded()  1
+#endif
+
+#endif /* _THREAD_OPTIM_H */
diff --git a/src/grep/gnulib-tests/uinttostr.c b/src/grep/gnulib-tests/uinttostr.c
new file mode 100644
index 0000000..46537eb
--- /dev/null
+++ b/src/grep/gnulib-tests/uinttostr.c
@@ -0,0 +1,20 @@
+/* Convert 'unsigned int' integer to printable string.
+
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#define anytostr uinttostr
+#define inttype unsigned int
+#include "anytostr.c"
diff --git a/src/grep/gnulib-tests/umaxtostr.c b/src/grep/gnulib-tests/umaxtostr.c
new file mode 100644
index 0000000..f8a7abc
--- /dev/null
+++ b/src/grep/gnulib-tests/umaxtostr.c
@@ -0,0 +1,20 @@
+/* Convert 'uintmax_t' integer to printable string.
+
+   Copyright (C) 2004-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#define anytostr umaxtostr
+#define inttype uintmax_t
+#include "anytostr.c"
diff --git a/src/grep/gnulib-tests/unistr/test-u8-mbtoucr.c b/src/grep/gnulib-tests/unistr/test-u8-mbtoucr.c
new file mode 100644
index 0000000..680014b
--- /dev/null
+++ b/src/grep/gnulib-tests/unistr/test-u8-mbtoucr.c
@@ -0,0 +1,187 @@
+/* Test of u8_mbtoucr() function.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2010.  */
+
+#include <config.h>
+
+#include "unistr.h"
+
+#include "macros.h"
+
+int
+main ()
+{
+  ucs4_t uc;
+  int ret;
+
+  /* Test NUL unit input.  */
+  {
+    static const uint8_t input[] = "";
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 1);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0);
+  }
+
+  /* Test ISO 646 unit input.  */
+  {
+    ucs4_t c;
+    uint8_t buf[1];
+
+    for (c = 0; c < 0x80; c++)
+      {
+        buf[0] = c;
+        uc = 0xBADFACE;
+        ret = u8_mbtoucr (&uc, buf, 1);
+        ASSERT (ret == 1);
+        ASSERT (uc == c);
+      }
+  }
+
+  /* Test 2-byte character input.  */
+  {
+    static const uint8_t input[] = { 0xC3, 0x97 };
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 2);
+    ASSERT (ret == 2);
+    ASSERT (uc == 0x00D7);
+  }
+
+  /* Test 3-byte character input.  */
+  {
+    static const uint8_t input[] = { 0xE2, 0x82, 0xAC };
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 3);
+    ASSERT (ret == 3);
+    ASSERT (uc == 0x20AC);
+  }
+
+  /* Test 4-byte character input.  */
+  {
+    static const uint8_t input[] = { 0xF4, 0x8F, 0xBF, 0xBD };
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 4);
+    ASSERT (ret == 4);
+    ASSERT (uc == 0x10FFFD);
+  }
+
+  /* Test incomplete/invalid 1-byte input.  */
+  {
+    static const uint8_t input[] = { 0xC1 };
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 1);
+    ASSERT (ret == -1);
+    ASSERT (uc == 0xFFFD);
+  }
+  {
+    static const uint8_t input[] = { 0xC3 };
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 1);
+    ASSERT (ret == -2);
+    ASSERT (uc == 0xFFFD);
+  }
+  {
+    static const uint8_t input[] = { 0xE2 };
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 1);
+    ASSERT (ret == -2);
+    ASSERT (uc == 0xFFFD);
+  }
+  {
+    static const uint8_t input[] = { 0xF4 };
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 1);
+    ASSERT (ret == -2);
+    ASSERT (uc == 0xFFFD);
+  }
+  {
+    static const uint8_t input[] = { 0xFE };
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 1);
+    ASSERT (ret == -1);
+    ASSERT (uc == 0xFFFD);
+  }
+
+  /* Test incomplete/invalid 2-byte input.  */
+  {
+    static const uint8_t input[] = { 0xE0, 0x9F };
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 2);
+    ASSERT (ret == -1);
+    ASSERT (uc == 0xFFFD);
+  }
+  {
+    static const uint8_t input[] = { 0xE2, 0x82 };
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 2);
+    ASSERT (ret == -2);
+    ASSERT (uc == 0xFFFD);
+  }
+  {
+    static const uint8_t input[] = { 0xE2, 0xD0 };
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 2);
+    ASSERT (ret == -1);
+    ASSERT (uc == 0xFFFD);
+  }
+  {
+    static const uint8_t input[] = { 0xF0, 0x8F };
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 2);
+    ASSERT (ret == -1);
+    ASSERT (uc == 0xFFFD);
+  }
+  {
+    static const uint8_t input[] = { 0xF3, 0x8F };
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 2);
+    ASSERT (ret == -2);
+    ASSERT (uc == 0xFFFD);
+  }
+  {
+    static const uint8_t input[] = { 0xF3, 0xD0 };
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 2);
+    ASSERT (ret == -1);
+    ASSERT (uc == 0xFFFD);
+  }
+
+  /* Test incomplete/invalid 3-byte input.  */
+  {
+    static const uint8_t input[] = { 0xF3, 0x8F, 0xBF };
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 3);
+    ASSERT (ret == -2);
+    ASSERT (uc == 0xFFFD);
+  }
+  {
+    static const uint8_t input[] = { 0xF3, 0xD0, 0xBF };
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 3);
+    ASSERT (ret == -1);
+    ASSERT (uc == 0xFFFD);
+  }
+  {
+    static const uint8_t input[] = { 0xF3, 0x8F, 0xD0 };
+    uc = 0xBADFACE;
+    ret = u8_mbtoucr (&uc, input, 3);
+    ASSERT (ret == -1);
+    ASSERT (uc == 0xFFFD);
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/unistr/test-u8-uctomb.c b/src/grep/gnulib-tests/unistr/test-u8-uctomb.c
new file mode 100644
index 0000000..ed8b077
--- /dev/null
+++ b/src/grep/gnulib-tests/unistr/test-u8-uctomb.c
@@ -0,0 +1,157 @@
+/* Test of u8_uctomb() function.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2010.  */
+
+#include <config.h>
+
+#include "unistr.h"
+
+#include "macros.h"
+
+#define MAGIC 0xBA
+
+int
+main ()
+{
+  /* Test ISO 646 character, in particular the NUL character.  */
+  {
+    ucs4_t uc;
+
+    for (uc = 0; uc < 0x80; uc++)
+      {
+        uint8_t buf[5] = { MAGIC, MAGIC, MAGIC, MAGIC, MAGIC };
+        int ret;
+
+        ret = u8_uctomb (buf, uc, 0);
+        ASSERT (ret == -2);
+        ASSERT (buf[0] == MAGIC);
+
+        ret = u8_uctomb (buf, uc, 1);
+        ASSERT (ret == 1);
+        ASSERT (buf[0] == uc);
+        ASSERT (buf[1] == MAGIC);
+      }
+  }
+
+  /* Test 2-byte character.  */
+  {
+    ucs4_t uc = 0x00D7;
+    uint8_t buf[5] = { MAGIC, MAGIC, MAGIC, MAGIC, MAGIC };
+    int ret;
+
+    ret = u8_uctomb (buf, uc, 0);
+    ASSERT (ret == -2);
+    ASSERT (buf[0] == MAGIC);
+
+    ret = u8_uctomb (buf, uc, 1);
+    ASSERT (ret == -2);
+    ASSERT (buf[0] == MAGIC);
+
+    ret = u8_uctomb (buf, uc, 2);
+    ASSERT (ret == 2);
+    ASSERT (buf[0] == 0xC3);
+    ASSERT (buf[1] == 0x97);
+    ASSERT (buf[2] == MAGIC);
+  }
+
+  /* Test 3-byte character.  */
+  {
+    ucs4_t uc = 0x20AC;
+    uint8_t buf[5] = { MAGIC, MAGIC, MAGIC, MAGIC, MAGIC };
+    int ret;
+
+    ret = u8_uctomb (buf, uc, 0);
+    ASSERT (ret == -2);
+    ASSERT (buf[0] == MAGIC);
+
+    ret = u8_uctomb (buf, uc, 1);
+    ASSERT (ret == -2);
+    ASSERT (buf[0] == MAGIC);
+
+    ret = u8_uctomb (buf, uc, 2);
+    ASSERT (ret == -2);
+    ASSERT (buf[0] == MAGIC);
+    ASSERT (buf[1] == MAGIC);
+
+    ret = u8_uctomb (buf, uc, 3);
+    ASSERT (ret == 3);
+    ASSERT (buf[0] == 0xE2);
+    ASSERT (buf[1] == 0x82);
+    ASSERT (buf[2] == 0xAC);
+    ASSERT (buf[3] == MAGIC);
+  }
+
+  /* Test 4-byte character.  */
+  {
+    ucs4_t uc = 0x10FFFD;
+    uint8_t buf[5] = { MAGIC, MAGIC, MAGIC, MAGIC, MAGIC };
+    int ret;
+
+    ret = u8_uctomb (buf, uc, 0);
+    ASSERT (ret == -2);
+    ASSERT (buf[0] == MAGIC);
+
+    ret = u8_uctomb (buf, uc, 1);
+    ASSERT (ret == -2);
+    ASSERT (buf[0] == MAGIC);
+
+    ret = u8_uctomb (buf, uc, 2);
+    ASSERT (ret == -2);
+    ASSERT (buf[0] == MAGIC);
+    ASSERT (buf[1] == MAGIC);
+
+    ret = u8_uctomb (buf, uc, 3);
+    ASSERT (ret == -2);
+    ASSERT (buf[0] == MAGIC);
+    ASSERT (buf[1] == MAGIC);
+    ASSERT (buf[2] == MAGIC);
+
+    ret = u8_uctomb (buf, uc, 4);
+    ASSERT (ret == 4);
+    ASSERT (buf[0] == 0xF4);
+    ASSERT (buf[1] == 0x8F);
+    ASSERT (buf[2] == 0xBF);
+    ASSERT (buf[3] == 0xBD);
+    ASSERT (buf[4] == MAGIC);
+  }
+
+  /* Test invalid characters.  */
+  {
+    ucs4_t invalid[] = { 0x110000, 0xD800, 0xDBFF, 0xDC00, 0xDFFF };
+    uint8_t buf[5] = { MAGIC, MAGIC, MAGIC, MAGIC, MAGIC };
+    size_t i;
+
+    for (i = 0; i < SIZEOF (invalid); i++)
+      {
+        ucs4_t uc = invalid[i];
+        int n;
+
+        for (n = 0; n <= 4; n++)
+          {
+            int ret = u8_uctomb (buf, uc, n);
+            ASSERT (ret == -1);
+            ASSERT (buf[0] == MAGIC);
+            ASSERT (buf[1] == MAGIC);
+            ASSERT (buf[2] == MAGIC);
+            ASSERT (buf[3] == MAGIC);
+            ASSERT (buf[4] == MAGIC);
+          }
+      }
+  }
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/uniwidth/test-uc_width.c b/src/grep/gnulib-tests/uniwidth/test-uc_width.c
new file mode 100644
index 0000000..c957d3c
--- /dev/null
+++ b/src/grep/gnulib-tests/uniwidth/test-uc_width.c
@@ -0,0 +1,56 @@
+/* Test of uc_width() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include "uniwidth.h"
+
+#include "macros.h"
+
+int
+main ()
+{
+  ucs4_t uc;
+
+  /* Test width of ASCII characters.  */
+  for (uc = 0x0020; uc < 0x007F; uc++)
+    ASSERT (uc_width (uc, "ISO-8859-2") == 1);
+
+  /* Test width of some non-spacing characters.  */
+  ASSERT (uc_width (0x0301, "UTF-8") == 0);
+  ASSERT (uc_width (0x05B0, "UTF-8") == 0);
+
+  /* Test width of some format control characters.  */
+  ASSERT (uc_width (0x200E, "UTF-8") == 0);
+  ASSERT (uc_width (0x2060, "UTF-8") == 0);
+  ASSERT (uc_width (0xE0001, "UTF-8") == 0);
+  ASSERT (uc_width (0xE0044, "UTF-8") == 0);
+
+  /* Test width of some zero width characters.  */
+  ASSERT (uc_width (0x200B, "UTF-8") == 0);
+  ASSERT (uc_width (0xFEFF, "UTF-8") == 0);
+
+  /* Test width of some CJK characters.  */
+  ASSERT (uc_width (0x3000, "UTF-8") == 2);
+  ASSERT (uc_width (0xB250, "UTF-8") == 2);
+  ASSERT (uc_width (0xFF1A, "UTF-8") == 2);
+  ASSERT (uc_width (0x20369, "UTF-8") == 2);
+  ASSERT (uc_width (0x2F876, "UTF-8") == 2);
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/uniwidth/test-uc_width2.c b/src/grep/gnulib-tests/uniwidth/test-uc_width2.c
new file mode 100644
index 0000000..2a68670
--- /dev/null
+++ b/src/grep/gnulib-tests/uniwidth/test-uc_width2.c
@@ -0,0 +1,86 @@
+/* Test of uc_width() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include "uniwidth.h"
+
+#include <stdio.h>
+
+#include "macros.h"
+
+/* One of 0, '0', '1', 'A', '2'.  */
+static char current_width;
+/* The interval for which the current_width holds.  */
+static ucs4_t current_start;
+static ucs4_t current_end;
+
+static void
+finish_interval (void)
+{
+  if (current_width != 0)
+    {
+      if (current_start == current_end)
+        printf ("%04X\t\t%c\n", (unsigned) current_start, current_width);
+      else
+        printf ("%04X..%04X\t%c\n", (unsigned) current_start,
+                (unsigned) current_end, current_width);
+      current_width = 0;
+    }
+}
+
+static void
+add_to_interval (ucs4_t uc, char width)
+{
+  if (current_width == width && uc == current_end + 1)
+    current_end = uc;
+  else
+    {
+      finish_interval ();
+      current_width = width;
+      current_start = current_end = uc;
+    }
+}
+
+int
+main ()
+{
+  ucs4_t uc;
+
+  for (uc = 0; uc < 0x110000; uc++)
+    {
+      int w1 = uc_width (uc, "UTF-8");
+      int w2 = uc_width (uc, "GBK");
+      char width =
+        (w1 == 0 && w2 == 0 ? '0' :
+         w1 == 1 && w2 == 1 ? '1' :
+         w1 == 1 && w2 == 2 ? 'A' :
+         w1 == 2 && w2 == 2 ? '2' :
+         0);
+      if (width == 0)
+        {
+          /* uc must be a control character.  */
+          ASSERT (w1 < 0 && w2 < 0);
+        }
+      else
+        add_to_interval (uc, width);
+    }
+  finish_interval ();
+
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/uniwidth/test-uc_width2.sh b/src/grep/gnulib-tests/uniwidth/test-uc_width2.sh
new file mode 100755
index 0000000..23866c9
--- /dev/null
+++ b/src/grep/gnulib-tests/uniwidth/test-uc_width2.sh
@@ -0,0 +1,631 @@
+#!/bin/sh
+
+tmpfiles=""
+trap 'rm -fr $tmpfiles' 1 2 3 15
+
+tmpfiles="$tmpfiles uc_width.out"
+${CHECKER} ./test-uc_width2${EXEEXT} | LC_ALL=C tr -d '\r' > uc_width.out
+
+tmpfiles="$tmpfiles uc_width.ok"
+cat > uc_width.ok <<\EOF
+0000		0
+0020..007E	1
+00A0		1
+00A1..00AC	A
+00AD		0
+00AE..02FF	A
+0300..036F	0
+0370..0482	A
+0483..0489	0
+048A..0590	A
+0591..05BD	0
+05BE		A
+05BF		0
+05C0		A
+05C1..05C2	0
+05C3		A
+05C4..05C5	0
+05C6		A
+05C7		0
+05C8..05FF	A
+0600..0605	0
+0606..060F	A
+0610..061A	0
+061B		A
+061C		0
+061D..064A	A
+064B..065F	0
+0660..066F	A
+0670		0
+0671..06D5	A
+06D6..06DD	0
+06DE		A
+06DF..06E4	0
+06E5..06E6	A
+06E7..06E8	0
+06E9		A
+06EA..06ED	0
+06EE..070E	A
+070F		0
+0710		A
+0711		0
+0712..072F	A
+0730..074A	0
+074B..07A5	A
+07A6..07B0	0
+07B1..07EA	A
+07EB..07F3	0
+07F4..0815	A
+0816..0819	0
+081A		A
+081B..0823	0
+0824		A
+0825..0827	0
+0828		A
+0829..082D	0
+082E..0858	A
+0859..085B	0
+085C..08D3	A
+08D4..0902	0
+0903..0939	A
+093A		0
+093B		A
+093C		0
+093D..0940	A
+0941..0948	0
+0949..094C	A
+094D		0
+094E..0950	A
+0951..0957	0
+0958..0961	A
+0962..0963	0
+0964..0980	A
+0981		0
+0982..09BB	A
+09BC		0
+09BD..09C0	A
+09C1..09C4	0
+09C5..09CC	A
+09CD		0
+09CE..09E1	A
+09E2..09E3	0
+09E4..0A00	A
+0A01..0A02	0
+0A03..0A3B	A
+0A3C		0
+0A3D..0A40	A
+0A41..0A42	0
+0A43..0A46	A
+0A47..0A48	0
+0A49..0A4A	A
+0A4B..0A4D	0
+0A4E..0A50	A
+0A51		0
+0A52..0A6F	A
+0A70..0A71	0
+0A72..0A74	A
+0A75		0
+0A76..0A80	A
+0A81..0A82	0
+0A83..0ABB	A
+0ABC		0
+0ABD..0AC0	A
+0AC1..0AC5	0
+0AC6		A
+0AC7..0AC8	0
+0AC9..0ACC	A
+0ACD		0
+0ACE..0AE1	A
+0AE2..0AE3	0
+0AE4..0B00	A
+0B01		0
+0B02..0B3B	A
+0B3C		0
+0B3D..0B3E	A
+0B3F		0
+0B40		A
+0B41..0B44	0
+0B45..0B4C	A
+0B4D		0
+0B4E..0B55	A
+0B56		0
+0B57..0B61	A
+0B62..0B63	0
+0B64..0B81	A
+0B82		0
+0B83..0BBF	A
+0BC0		0
+0BC1..0BCC	A
+0BCD		0
+0BCE..0BFF	A
+0C00		0
+0C01..0C3D	A
+0C3E..0C40	0
+0C41..0C45	A
+0C46..0C48	0
+0C49		A
+0C4A..0C4D	0
+0C4E..0C54	A
+0C55..0C56	0
+0C57..0C61	A
+0C62..0C63	0
+0C64..0C80	A
+0C81		0
+0C82..0CBB	A
+0CBC		0
+0CBD..0CCB	A
+0CCC..0CCD	0
+0CCE..0CE1	A
+0CE2..0CE3	0
+0CE4..0D00	A
+0D01		0
+0D02..0D40	A
+0D41..0D44	0
+0D45..0D4C	A
+0D4D		0
+0D4E..0D61	A
+0D62..0D63	0
+0D64..0DC9	A
+0DCA		0
+0DCB..0DD1	A
+0DD2..0DD4	0
+0DD5		A
+0DD6		0
+0DD7..0E30	A
+0E31		0
+0E32..0E33	A
+0E34..0E3A	0
+0E3B..0E46	A
+0E47..0E4E	0
+0E4F..0EB0	A
+0EB1		0
+0EB2..0EB3	A
+0EB4..0EB9	0
+0EBA		A
+0EBB..0EBC	0
+0EBD..0EC7	A
+0EC8..0ECD	0
+0ECE..0F17	A
+0F18..0F19	0
+0F1A..0F34	A
+0F35		0
+0F36		A
+0F37		0
+0F38		A
+0F39		0
+0F3A..0F70	A
+0F71..0F7E	0
+0F7F		A
+0F80..0F84	0
+0F85		A
+0F86..0F87	0
+0F88..0F8C	A
+0F8D..0F97	0
+0F98		A
+0F99..0FBC	0
+0FBD..0FC5	A
+0FC6		0
+0FC7..102C	A
+102D..1030	0
+1031		A
+1032..1037	0
+1038		A
+1039..103A	0
+103B..103C	A
+103D..103E	0
+103F..1057	A
+1058..1059	0
+105A..105D	A
+105E..1060	0
+1061..1070	A
+1071..1074	0
+1075..1081	A
+1082		0
+1083..1084	A
+1085..1086	0
+1087..108C	A
+108D		0
+108E..109C	A
+109D		0
+109E..10FF	A
+1100..115F	2
+1160..135C	A
+135D..135F	0
+1360..1711	A
+1712..1714	0
+1715..1731	A
+1732..1734	0
+1735..1751	A
+1752..1753	0
+1754..1771	A
+1772..1773	0
+1774..17B3	A
+17B4..17B5	0
+17B6		A
+17B7..17BD	0
+17BE..17C5	A
+17C6		0
+17C7..17C8	A
+17C9..17D3	0
+17D4..17DC	A
+17DD		0
+17DE..180A	A
+180B..180E	0
+180F..1884	A
+1885..1886	0
+1887..18A8	A
+18A9		0
+18AA..191F	A
+1920..1922	0
+1923..1926	A
+1927..1928	0
+1929..1931	A
+1932		0
+1933..1938	A
+1939..193B	0
+193C..1A16	A
+1A17..1A18	0
+1A19..1A1A	A
+1A1B		0
+1A1C..1A55	A
+1A56		0
+1A57		A
+1A58..1A5E	0
+1A5F		A
+1A60		0
+1A61		A
+1A62		0
+1A63..1A64	A
+1A65..1A6C	0
+1A6D..1A72	A
+1A73..1A7C	0
+1A7D..1A7E	A
+1A7F		0
+1A80..1AAF	A
+1AB0..1ABE	0
+1ABF..1AFF	A
+1B00..1B03	0
+1B04..1B33	A
+1B34		0
+1B35		A
+1B36..1B3A	0
+1B3B		A
+1B3C		0
+1B3D..1B41	A
+1B42		0
+1B43..1B6A	A
+1B6B..1B73	0
+1B74..1B7F	A
+1B80..1B81	0
+1B82..1BA1	A
+1BA2..1BA5	0
+1BA6..1BA7	A
+1BA8..1BA9	0
+1BAA		A
+1BAB..1BAD	0
+1BAE..1BE5	A
+1BE6		0
+1BE7		A
+1BE8..1BE9	0
+1BEA..1BEC	A
+1BED		0
+1BEE		A
+1BEF..1BF1	0
+1BF2..1C2B	A
+1C2C..1C33	0
+1C34..1C35	A
+1C36..1C37	0
+1C38..1CCF	A
+1CD0..1CD2	0
+1CD3		A
+1CD4..1CE0	0
+1CE1		A
+1CE2..1CE8	0
+1CE9..1CEC	A
+1CED		0
+1CEE..1CF3	A
+1CF4		0
+1CF5..1CF7	A
+1CF8..1CF9	0
+1CFA..1DBF	A
+1DC0..1DF5	0
+1DF6..1DFA	A
+1DFB..1DFF	0
+1E00..200A	A
+200B..200F	0
+2010..2029	A
+202A..202E	0
+202F..205F	A
+2060..2064	0
+2065		A
+2066..206F	0
+2070..20A8	A
+20A9		1
+20AA..20CF	A
+20D0..20F0	0
+20F1..2328	A
+2329..232A	2
+232B..2CEE	A
+2CEF..2CF1	0
+2CF2..2D7E	A
+2D7F		0
+2D80..2DDF	A
+2DE0..2DFF	0
+2E00..2E7F	A
+2E80..3029	2
+302A..302D	0
+302E..303E	2
+303F		A
+3040..3098	2
+3099..309A	0
+309B..4DBF	2
+4DC0..4DFF	A
+4E00..A4CF	2
+A4D0..A66E	A
+A66F..A672	0
+A673		A
+A674..A67D	0
+A67E..A69D	A
+A69E..A69F	0
+A6A0..A6EF	A
+A6F0..A6F1	0
+A6F2..A801	A
+A802		0
+A803..A805	A
+A806		0
+A807..A80A	A
+A80B		0
+A80C..A824	A
+A825..A826	0
+A827..A8C3	A
+A8C4..A8C5	0
+A8C6..A8DF	A
+A8E0..A8F1	0
+A8F2..A925	A
+A926..A92D	0
+A92E..A946	A
+A947..A951	0
+A952..A97F	A
+A980..A982	0
+A983..A9B2	A
+A9B3		0
+A9B4..A9B5	A
+A9B6..A9B9	0
+A9BA..A9BB	A
+A9BC		0
+A9BD..A9E4	A
+A9E5		0
+A9E6..AA28	A
+AA29..AA2E	0
+AA2F..AA30	A
+AA31..AA32	0
+AA33..AA34	A
+AA35..AA36	0
+AA37..AA42	A
+AA43		0
+AA44..AA4B	A
+AA4C		0
+AA4D..AA7B	A
+AA7C		0
+AA7D..AAAF	A
+AAB0		0
+AAB1		A
+AAB2..AAB4	0
+AAB5..AAB6	A
+AAB7..AAB8	0
+AAB9..AABD	A
+AABE..AABF	0
+AAC0		A
+AAC1		0
+AAC2..AAEB	A
+AAEC..AAED	0
+AAEE..AAF5	A
+AAF6		0
+AAF7..ABE4	A
+ABE5		0
+ABE6..ABE7	A
+ABE8		0
+ABE9..ABEC	A
+ABED		0
+ABEE..ABFF	A
+AC00..D7A3	2
+D7A4..F8FF	A
+F900..FAFF	2
+FB00..FB1D	A
+FB1E		0
+FB1F..FDFF	A
+FE00..FE0F	0
+FE10..FE1F	2
+FE20..FE2F	0
+FE30..FE6F	2
+FE70..FEFE	A
+FEFF		0
+FF00..FF60	2
+FF61..FFDF	1
+FFE0..FFE6	2
+FFE7..FFF8	1
+FFF9..FFFB	0
+FFFC..101FC	1
+101FD		0
+101FE..102DF	1
+102E0		0
+102E1..10375	1
+10376..1037A	0
+1037B..10A00	1
+10A01..10A03	0
+10A04		1
+10A05..10A06	0
+10A07..10A0B	1
+10A0C..10A0F	0
+10A10..10A37	1
+10A38..10A3A	0
+10A3B..10A3E	1
+10A3F		0
+10A40..10AE4	1
+10AE5..10AE6	0
+10AE7..11000	1
+11001		0
+11002..11037	1
+11038..11046	0
+11047..1107E	1
+1107F..11081	0
+11082..110B2	1
+110B3..110B6	0
+110B7..110B8	1
+110B9..110BA	0
+110BB..110BC	1
+110BD		0
+110BE..110FF	1
+11100..11102	0
+11103..11126	1
+11127..1112B	0
+1112C		1
+1112D..11134	0
+11135..11172	1
+11173		0
+11174..1117F	1
+11180..11181	0
+11182..111B5	1
+111B6..111BE	0
+111BF..111C9	1
+111CA..111CC	0
+111CD..1122E	1
+1122F..11231	0
+11232..11233	1
+11234		0
+11235		1
+11236..11237	0
+11238..1123D	1
+1123E		0
+1123F..112DE	1
+112DF		0
+112E0..112E2	1
+112E3..112EA	0
+112EB..112FF	1
+11300..11301	0
+11302..1133B	1
+1133C		0
+1133D..1133F	1
+11340		0
+11341..11365	1
+11366..1136C	0
+1136D..1136F	1
+11370..11374	0
+11375..11437	1
+11438..1143F	0
+11440..11441	1
+11442..11444	0
+11445		1
+11446		0
+11447..114B2	1
+114B3..114B8	0
+114B9		1
+114BA		0
+114BB..114BE	1
+114BF..114C0	0
+114C1		1
+114C2..114C3	0
+114C4..115B1	1
+115B2..115B5	0
+115B6..115BB	1
+115BC..115BD	0
+115BE		1
+115BF..115C0	0
+115C1..115DB	1
+115DC..115DD	0
+115DE..11632	1
+11633..1163A	0
+1163B..1163C	1
+1163D		0
+1163E		1
+1163F..11640	0
+11641..116AA	1
+116AB		0
+116AC		1
+116AD		0
+116AE..116AF	1
+116B0..116B5	0
+116B6		1
+116B7		0
+116B8..1171C	1
+1171D..1171F	0
+11720..11721	1
+11722..11725	0
+11726		1
+11727..1172B	0
+1172C..11C2F	1
+11C30..11C36	0
+11C37		1
+11C38..11C3D	0
+11C3E..11C91	1
+11C92..11CA7	0
+11CA8..11CA9	1
+11CAA..11CB0	0
+11CB1		1
+11CB2..11CB3	0
+11CB4		1
+11CB5..11CB6	0
+11CB7..16AEF	1
+16AF0..16AF4	0
+16AF5..16B2F	1
+16B30..16B36	0
+16B37..16F8E	1
+16F8F..16F92	0
+16F93..1BC9C	1
+1BC9D..1BC9E	0
+1BC9F		1
+1BCA0..1BCA3	0
+1BCA4..1D166	1
+1D167..1D169	0
+1D16A..1D172	1
+1D173..1D182	0
+1D183..1D184	1
+1D185..1D18B	0
+1D18C..1D1A9	1
+1D1AA..1D1AD	0
+1D1AE..1D241	1
+1D242..1D244	0
+1D245..1D9FF	1
+1DA00..1DA36	0
+1DA37..1DA3A	1
+1DA3B..1DA6C	0
+1DA6D..1DA74	1
+1DA75		0
+1DA76..1DA83	1
+1DA84		0
+1DA85..1DA9A	1
+1DA9B..1DA9F	0
+1DAA0		1
+1DAA1..1DAAF	0
+1DAB0..1DFFF	1
+1E000..1E006	0
+1E007		1
+1E008..1E018	0
+1E019..1E01A	1
+1E01B..1E021	0
+1E022		1
+1E023..1E024	0
+1E025		1
+1E026..1E02A	0
+1E02B..1E8CF	1
+1E8D0..1E8D6	0
+1E8D7..1E943	1
+1E944..1E94A	0
+1E94B..1FFFF	1
+20000..3FFFF	2
+40000..E0000	1
+E0001		0
+E0002..E001F	1
+E0020..E007F	0
+E0080..E00FF	1
+E0100..E01EF	0
+E01F0..10FFFF	1
+EOF
+
+: ${DIFF=diff}
+${DIFF} uc_width.ok uc_width.out
+result=$?
+
+rm -fr $tmpfiles
+
+exit $result
diff --git a/src/grep/gnulib-tests/unsetenv.c b/src/grep/gnulib-tests/unsetenv.c
new file mode 100644
index 0000000..b2e910e
--- /dev/null
+++ b/src/grep/gnulib-tests/unsetenv.c
@@ -0,0 +1,127 @@
+/* Copyright (C) 1992, 1995-2002, 2005-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Don't use __attribute__ __nonnull__ in this compilation unit.  Otherwise gcc
+   optimizes away the name == NULL test below.  */
+#define _GL_ARG_NONNULL(params)
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include <errno.h>
+#if !_LIBC
+# define __set_errno(ev) ((errno) = (ev))
+#endif
+
+#include <string.h>
+#include <unistd.h>
+
+#if !_LIBC
+# define __environ      environ
+#endif
+
+#if _LIBC
+/* This lock protects against simultaneous modifications of 'environ'.  */
+# include <bits/libc-lock.h>
+__libc_lock_define_initialized (static, envlock)
+# define LOCK   __libc_lock_lock (envlock)
+# define UNLOCK __libc_lock_unlock (envlock)
+#else
+# define LOCK
+# define UNLOCK
+#endif
+
+/* In the GNU C library we must keep the namespace clean.  */
+#ifdef _LIBC
+# define unsetenv __unsetenv
+#endif
+
+#if _LIBC || !HAVE_UNSETENV
+
+int
+unsetenv (const char *name)
+{
+  size_t len;
+  char **ep;
+
+  if (name == NULL || *name == '\0' || strchr (name, '=') != NULL)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  len = strlen (name);
+
+  LOCK;
+
+  ep = __environ;
+  while (*ep != NULL)
+    if (!strncmp (*ep, name, len) && (*ep)[len] == '=')
+      {
+        /* Found it.  Remove this pointer by moving later ones back.  */
+        char **dp = ep;
+
+        do
+          dp[0] = dp[1];
+        while (*dp++);
+        /* Continue the loop in case NAME appears again.  */
+      }
+    else
+      ++ep;
+
+  UNLOCK;
+
+  return 0;
+}
+
+#ifdef _LIBC
+# undef unsetenv
+weak_alias (__unsetenv, unsetenv)
+#endif
+
+#else /* HAVE_UNSETENV */
+
+# undef unsetenv
+# if !HAVE_DECL_UNSETENV
+#  if VOID_UNSETENV
+extern void unsetenv (const char *);
+#  else
+extern int unsetenv (const char *);
+#  endif
+# endif
+
+/* Call the underlying unsetenv, in case there is hidden bookkeeping
+   that needs updating beyond just modifying environ.  */
+int
+rpl_unsetenv (const char *name)
+{
+  int result = 0;
+  if (!name || !*name || strchr (name, '='))
+    {
+      errno = EINVAL;
+      return -1;
+    }
+  while (getenv (name))
+# if !VOID_UNSETENV
+    result =
+# endif
+      unsetenv (name);
+  return result;
+}
+
+#endif /* HAVE_UNSETENV */
diff --git a/src/grep/gnulib-tests/vasnprintf.c b/src/grep/gnulib-tests/vasnprintf.c
new file mode 100644
index 0000000..d9b669d
--- /dev/null
+++ b/src/grep/gnulib-tests/vasnprintf.c
@@ -0,0 +1,5872 @@
+/* vsprintf with automatic memory allocation.
+   Copyright (C) 1999, 2002-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* This file can be parametrized with the following macros:
+     VASNPRINTF         The name of the function being defined.
+     FCHAR_T            The element type of the format string.
+     DCHAR_T            The element type of the destination (result) string.
+     FCHAR_T_ONLY_ASCII Set to 1 to enable verification that all characters
+                        in the format string are ASCII. MUST be set if
+                        FCHAR_T and DCHAR_T are not the same type.
+     DIRECTIVE          Structure denoting a format directive.
+                        Depends on FCHAR_T.
+     DIRECTIVES         Structure denoting the set of format directives of a
+                        format string.  Depends on FCHAR_T.
+     PRINTF_PARSE       Function that parses a format string.
+                        Depends on FCHAR_T.
+     DCHAR_CPY          memcpy like function for DCHAR_T[] arrays.
+     DCHAR_SET          memset like function for DCHAR_T[] arrays.
+     DCHAR_MBSNLEN      mbsnlen like function for DCHAR_T[] arrays.
+     SNPRINTF           The system's snprintf (or similar) function.
+                        This may be either snprintf or swprintf.
+     TCHAR_T            The element type of the argument and result string
+                        of the said SNPRINTF function.  This may be either
+                        char or wchar_t.  The code exploits that
+                        sizeof (TCHAR_T) | sizeof (DCHAR_T) and
+                        alignof (TCHAR_T) <= alignof (DCHAR_T).
+     DCHAR_IS_TCHAR     Set to 1 if DCHAR_T and TCHAR_T are the same type.
+     DCHAR_CONV_FROM_ENCODING A function to convert from char[] to DCHAR[].
+     DCHAR_IS_UINT8_T   Set to 1 if DCHAR_T is uint8_t.
+     DCHAR_IS_UINT16_T  Set to 1 if DCHAR_T is uint16_t.
+     DCHAR_IS_UINT32_T  Set to 1 if DCHAR_T is uint32_t.
+     ENABLE_UNISTDIO    Set to 1 to enable the unistdio extensions.
+     ENABLE_WCHAR_FALLBACK  Set to 1 to avoid EILSEQ during conversion of wide
+                        characters (wchar_t) and wide character strings
+                        (wchar_t[]) to multibyte sequences.  The fallback is the
+                        hexadecimal escape syntax (\unnnn or \Unnnnnnnn) or,
+                        if wchar_t is not Unicode encoded, \wnnnn or \Wnnnnnnnn.
+ */
+
+/* Tell glibc's <stdio.h> to provide a prototype for snprintf().
+   This must come before <config.h> because <config.h> may include
+   <features.h>, and once <features.h> has been included, it's too late.  */
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE    1
+#endif
+
+#ifndef VASNPRINTF
+# include <config.h>
+#endif
+
+/* As of GCC 11.2.1, gcc -Wanalyzer-too-complex reports that main's
+   use of CHECK macros expands to code that is too complicated for gcc
+   -fanalyzer.  Suppress the resulting bogus warnings.  */
+#if 10 <= __GNUC__
+# pragma GCC diagnostic ignored "-Wanalyzer-null-argument"
+#endif
+
+#include <alloca.h>
+
+/* Specification.  */
+#ifndef VASNPRINTF
+# if WIDE_CHAR_VERSION
+#  include "vasnwprintf.h"
+# else
+#  include "vasnprintf.h"
+# endif
+#endif
+
+#include <locale.h>     /* localeconv() */
+#include <stdio.h>      /* snprintf(), sprintf() */
+#include <stdlib.h>     /* abort(), malloc(), realloc(), free() */
+#include <string.h>     /* memcpy(), strlen() */
+#include <errno.h>      /* errno */
+#include <limits.h>     /* CHAR_BIT */
+#include <float.h>      /* DBL_MAX_EXP, LDBL_MAX_EXP */
+#if HAVE_NL_LANGINFO
+# include <langinfo.h>
+#endif
+#ifndef VASNPRINTF
+# if WIDE_CHAR_VERSION
+#  include "wprintf-parse.h"
+# else
+#  include "printf-parse.h"
+# endif
+#endif
+
+/* Checked size_t computations.  */
+#include "xsize.h"
+
+#include "attribute.h"
+#include "verify.h"
+
+#if (NEED_PRINTF_DOUBLE || NEED_PRINTF_LONG_DOUBLE) && !defined IN_LIBINTL
+# include <math.h>
+# include "float+.h"
+#endif
+
+#if (NEED_PRINTF_DOUBLE || NEED_PRINTF_INFINITE_DOUBLE) && !defined IN_LIBINTL
+# include <math.h>
+# include "isnand-nolibm.h"
+#endif
+
+#if (NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_INFINITE_LONG_DOUBLE) && !defined IN_LIBINTL
+# include <math.h>
+# include "isnanl-nolibm.h"
+# include "fpucw.h"
+#endif
+
+#if (NEED_PRINTF_DIRECTIVE_A || NEED_PRINTF_DOUBLE) && !defined IN_LIBINTL
+# include <math.h>
+# include "isnand-nolibm.h"
+# include "printf-frexp.h"
+#endif
+
+#if (NEED_PRINTF_DIRECTIVE_A || NEED_PRINTF_LONG_DOUBLE) && !defined IN_LIBINTL
+# include <math.h>
+# include "isnanl-nolibm.h"
+# include "printf-frexpl.h"
+# include "fpucw.h"
+#endif
+
+/* Default parameters.  */
+#ifndef VASNPRINTF
+# if WIDE_CHAR_VERSION
+#  define VASNPRINTF vasnwprintf
+#  define FCHAR_T wchar_t
+#  define DCHAR_T wchar_t
+#  define TCHAR_T wchar_t
+#  define DCHAR_IS_TCHAR 1
+#  define DIRECTIVE wchar_t_directive
+#  define DIRECTIVES wchar_t_directives
+#  define PRINTF_PARSE wprintf_parse
+#  define DCHAR_CPY wmemcpy
+#  define DCHAR_SET wmemset
+# else
+#  define VASNPRINTF vasnprintf
+#  define FCHAR_T char
+#  define DCHAR_T char
+#  define TCHAR_T char
+#  define DCHAR_IS_TCHAR 1
+#  define DIRECTIVE char_directive
+#  define DIRECTIVES char_directives
+#  define PRINTF_PARSE printf_parse
+#  define DCHAR_CPY memcpy
+#  define DCHAR_SET memset
+# endif
+#endif
+#if WIDE_CHAR_VERSION
+  /* TCHAR_T is wchar_t.  */
+# define USE_SNPRINTF 1
+# if HAVE_DECL__SNWPRINTF
+   /* On Windows, the function swprintf() has a different signature than
+      on Unix; we use the function _snwprintf() or - on mingw - snwprintf()
+      instead.  The mingw function snwprintf() has fewer bugs than the
+      MSVCRT function _snwprintf(), so prefer that.  */
+#  if defined __MINGW32__
+#   define SNPRINTF snwprintf
+#  else
+#   define SNPRINTF _snwprintf
+#   define USE_MSVC__SNPRINTF 1
+#  endif
+# else
+   /* Unix.  */
+#  define SNPRINTF swprintf
+# endif
+#else
+  /* TCHAR_T is char.  */
+  /* Use snprintf if it exists under the name 'snprintf' or '_snprintf'.
+     But don't use it on BeOS, since BeOS snprintf produces no output if the
+     size argument is >= 0x3000000.
+     Also don't use it on Linux libc5, since there snprintf with size = 1
+     writes any output without bounds, like sprintf.  */
+# if (HAVE_DECL__SNPRINTF || HAVE_SNPRINTF) && !defined __BEOS__ && !(__GNU_LIBRARY__ == 1)
+#  define USE_SNPRINTF 1
+# else
+#  define USE_SNPRINTF 0
+# endif
+# if HAVE_DECL__SNPRINTF
+   /* Windows.  The mingw function snprintf() has fewer bugs than the MSVCRT
+      function _snprintf(), so prefer that.  */
+#  if defined __MINGW32__
+#   define SNPRINTF snprintf
+    /* Here we need to call the native snprintf, not rpl_snprintf.  */
+#   undef snprintf
+#  else
+    /* MSVC versions < 14 did not have snprintf, only _snprintf.  */
+#   define SNPRINTF _snprintf
+#   define USE_MSVC__SNPRINTF 1
+#  endif
+# else
+   /* Unix.  */
+#  define SNPRINTF snprintf
+   /* Here we need to call the native snprintf, not rpl_snprintf.  */
+#  undef snprintf
+# endif
+#endif
+/* Here we need to call the native sprintf, not rpl_sprintf.  */
+#undef sprintf
+
+/* GCC >= 4.0 with -Wall emits unjustified "... may be used uninitialized"
+   warnings in this file.  Use -Dlint to suppress them.  */
+#if defined GCC_LINT || defined lint
+# define IF_LINT(Code) Code
+#else
+# define IF_LINT(Code) /* empty */
+#endif
+
+/* Avoid some warnings from "gcc -Wshadow".
+   This file doesn't use the exp() and remainder() functions.  */
+#undef exp
+#define exp expo
+#undef remainder
+#define remainder rem
+
+#if (!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF) && !WIDE_CHAR_VERSION
+# if (HAVE_STRNLEN && !defined _AIX)
+#  define local_strnlen strnlen
+# else
+#  ifndef local_strnlen_defined
+#   define local_strnlen_defined 1
+static size_t
+local_strnlen (const char *string, size_t maxlen)
+{
+  const char *end = memchr (string, '\0', maxlen);
+  return end ? (size_t) (end - string) : maxlen;
+}
+#  endif
+# endif
+#endif
+
+#if (((!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF) && WIDE_CHAR_VERSION) || ((!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || (NEED_PRINTF_DIRECTIVE_LS && !defined IN_LIBINTL)) && !WIDE_CHAR_VERSION && DCHAR_IS_TCHAR)) && HAVE_WCHAR_T
+# if HAVE_WCSLEN
+#  define local_wcslen wcslen
+# else
+   /* Solaris 2.5.1 has wcslen() in a separate library libw.so. To avoid
+      a dependency towards this library, here is a local substitute.
+      Define this substitute only once, even if this file is included
+      twice in the same compilation unit.  */
+#  ifndef local_wcslen_defined
+#   define local_wcslen_defined 1
+static size_t
+local_wcslen (const wchar_t *s)
+{
+  const wchar_t *ptr;
+
+  for (ptr = s; *ptr != (wchar_t) 0; ptr++)
+    ;
+  return ptr - s;
+}
+#  endif
+# endif
+#endif
+
+#if (!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF) && HAVE_WCHAR_T && WIDE_CHAR_VERSION
+# if HAVE_WCSNLEN
+#  define local_wcsnlen wcsnlen
+# else
+#  ifndef local_wcsnlen_defined
+#   define local_wcsnlen_defined 1
+static size_t
+local_wcsnlen (const wchar_t *s, size_t maxlen)
+{
+  const wchar_t *ptr;
+
+  for (ptr = s; maxlen > 0 && *ptr != (wchar_t) 0; ptr++, maxlen--)
+    ;
+  return ptr - s;
+}
+#  endif
+# endif
+#endif
+
+#if (((!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || (NEED_PRINTF_DIRECTIVE_LS && !defined IN_LIBINTL) || ENABLE_WCHAR_FALLBACK) && HAVE_WCHAR_T) || (ENABLE_WCHAR_FALLBACK && HAVE_WINT_T)) && !WIDE_CHAR_VERSION
+# if ENABLE_WCHAR_FALLBACK
+static size_t
+wctomb_fallback (char *s, wchar_t wc)
+{
+  static char hex[16] = "0123456789ABCDEF";
+
+  s[0] = '\\';
+  if (sizeof (wchar_t) > 2 && wc > 0xffff)
+    {
+#  if __STDC_ISO_10646__ || (__GLIBC__ >= 2) || (defined _WIN32 || defined __CYGWIN__)
+      s[1] = 'U';
+#  else
+      s[1] = 'W';
+#  endif
+      s[2] = hex[(wc & 0xf0000000U) >> 28];
+      s[3] = hex[(wc & 0xf000000U) >> 24];
+      s[4] = hex[(wc & 0xf00000U) >> 20];
+      s[5] = hex[(wc & 0xf0000U) >> 16];
+      s[6] = hex[(wc & 0xf000U) >> 12];
+      s[7] = hex[(wc & 0xf00U) >> 8];
+      s[8] = hex[(wc & 0xf0U) >> 4];
+      s[9] = hex[wc & 0xfU];
+      return 10;
+    }
+  else
+    {
+#  if __STDC_ISO_10646__ || (__GLIBC__ >= 2) || (defined _WIN32 || defined __CYGWIN__)
+      s[1] = 'u';
+#  else
+      s[1] = 'w';
+#  endif
+      s[2] = hex[(wc & 0xf000U) >> 12];
+      s[3] = hex[(wc & 0xf00U) >> 8];
+      s[4] = hex[(wc & 0xf0U) >> 4];
+      s[5] = hex[wc & 0xfU];
+      return 6;
+    }
+}
+#  if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
+static size_t
+local_wcrtomb (char *s, wchar_t wc, mbstate_t *ps)
+{
+  size_t count = wcrtomb (s, wc, ps);
+  if (count == (size_t)(-1))
+    count = wctomb_fallback (s, wc);
+  return count;
+}
+#  else
+static int
+local_wctomb (char *s, wchar_t wc)
+{
+  int count = wctomb (s, wc);
+  if (count < 0)
+    count = wctomb_fallback (s, wc);
+  return count;
+}
+#   define local_wcrtomb(S, WC, PS)  local_wctomb ((S), (WC))
+#  endif
+# else
+#  if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
+#   define local_wcrtomb(S, WC, PS)  wcrtomb ((S), (WC), (PS))
+#  else
+#   define local_wcrtomb(S, WC, PS)  wctomb ((S), (WC))
+#  endif
+# endif
+#endif
+
+#if (NEED_PRINTF_DIRECTIVE_A || NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_INFINITE_LONG_DOUBLE || NEED_PRINTF_DOUBLE || NEED_PRINTF_INFINITE_DOUBLE) && !defined IN_LIBINTL
+/* Determine the decimal-point character according to the current locale.  */
+# ifndef decimal_point_char_defined
+#  define decimal_point_char_defined 1
+static char
+decimal_point_char (void)
+{
+  const char *point;
+  /* Determine it in a multithread-safe way.  We know nl_langinfo is
+     multithread-safe on glibc systems and Mac OS X systems, but is not required
+     to be multithread-safe by POSIX.  sprintf(), however, is multithread-safe.
+     localeconv() is rarely multithread-safe.  */
+#  if HAVE_NL_LANGINFO && (__GLIBC__ || defined __UCLIBC__ || (defined __APPLE__ && defined __MACH__))
+  point = nl_langinfo (RADIXCHAR);
+#  elif 1
+  char pointbuf[5];
+  sprintf (pointbuf, "%#.0f", 1.0);
+  point = &pointbuf[1];
+#  else
+  point = localeconv () -> decimal_point;
+#  endif
+  /* The decimal point is always a single byte: either '.' or ','.  */
+  return (point[0] != '\0' ? point[0] : '.');
+}
+# endif
+#endif
+
+#if NEED_PRINTF_INFINITE_DOUBLE && !NEED_PRINTF_DOUBLE && !defined IN_LIBINTL
+
+/* Equivalent to !isfinite(x) || x == 0, but does not require libm.  */
+static int
+is_infinite_or_zero (double x)
+{
+  return isnand (x) || x + x == x;
+}
+
+#endif
+
+#if NEED_PRINTF_INFINITE_LONG_DOUBLE && !NEED_PRINTF_LONG_DOUBLE && !defined IN_LIBINTL
+
+/* Equivalent to !isfinite(x) || x == 0, but does not require libm.  */
+static int
+is_infinite_or_zerol (long double x)
+{
+  return isnanl (x) || x + x == x;
+}
+
+#endif
+
+#if (NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_DOUBLE) && !defined IN_LIBINTL
+
+/* Converting 'long double' to decimal without rare rounding bugs requires
+   real bignums.  We use the naming conventions of GNU gmp, but vastly simpler
+   (and slower) algorithms.  */
+
+typedef unsigned int mp_limb_t;
+# define GMP_LIMB_BITS 32
+verify (sizeof (mp_limb_t) * CHAR_BIT == GMP_LIMB_BITS);
+
+typedef unsigned long long mp_twolimb_t;
+# define GMP_TWOLIMB_BITS 64
+verify (sizeof (mp_twolimb_t) * CHAR_BIT == GMP_TWOLIMB_BITS);
+
+/* Representation of a bignum >= 0.  */
+typedef struct
+{
+  size_t nlimbs;
+  mp_limb_t *limbs; /* Bits in little-endian order, allocated with malloc().  */
+} mpn_t;
+
+/* Compute the product of two bignums >= 0.
+   Return the allocated memory in case of success, NULL in case of memory
+   allocation failure.  */
+static void *
+multiply (mpn_t src1, mpn_t src2, mpn_t *dest)
+{
+  const mp_limb_t *p1;
+  const mp_limb_t *p2;
+  size_t len1;
+  size_t len2;
+
+  if (src1.nlimbs <= src2.nlimbs)
+    {
+      len1 = src1.nlimbs;
+      p1 = src1.limbs;
+      len2 = src2.nlimbs;
+      p2 = src2.limbs;
+    }
+  else
+    {
+      len1 = src2.nlimbs;
+      p1 = src2.limbs;
+      len2 = src1.nlimbs;
+      p2 = src1.limbs;
+    }
+  /* Now 0 <= len1 <= len2.  */
+  if (len1 == 0)
+    {
+      /* src1 or src2 is zero.  */
+      dest->nlimbs = 0;
+      dest->limbs = (mp_limb_t *) malloc (1);
+    }
+  else
+    {
+      /* Here 1 <= len1 <= len2.  */
+      size_t dlen;
+      mp_limb_t *dp;
+      size_t k, i, j;
+
+      dlen = len1 + len2;
+      dp = (mp_limb_t *) malloc (dlen * sizeof (mp_limb_t));
+      if (dp == NULL)
+        return NULL;
+      for (k = len2; k > 0; )
+        dp[--k] = 0;
+      for (i = 0; i < len1; i++)
+        {
+          mp_limb_t digit1 = p1[i];
+          mp_twolimb_t carry = 0;
+          for (j = 0; j < len2; j++)
+            {
+              mp_limb_t digit2 = p2[j];
+              carry += (mp_twolimb_t) digit1 * (mp_twolimb_t) digit2;
+              carry += dp[i + j];
+              dp[i + j] = (mp_limb_t) carry;
+              carry = carry >> GMP_LIMB_BITS;
+            }
+          dp[i + len2] = (mp_limb_t) carry;
+        }
+      /* Normalise.  */
+      while (dlen > 0 && dp[dlen - 1] == 0)
+        dlen--;
+      dest->nlimbs = dlen;
+      dest->limbs = dp;
+    }
+  return dest->limbs;
+}
+
+/* Compute the quotient of a bignum a >= 0 and a bignum b > 0.
+   a is written as  a = q * b + r  with 0 <= r < b.  q is the quotient, r
+   the remainder.
+   Finally, round-to-even is performed: If r > b/2 or if r = b/2 and q is odd,
+   q is incremented.
+   Return the allocated memory in case of success, NULL in case of memory
+   allocation failure.  */
+static void *
+divide (mpn_t a, mpn_t b, mpn_t *q)
+{
+  /* Algorithm:
+     First normalise a and b: a=[a[m-1],...,a[0]], b=[b[n-1],...,b[0]]
+     with m>=0 and n>0 (in base beta = 2^GMP_LIMB_BITS).
+     If m<n, then q:=0 and r:=a.
+     If m>=n=1, perform a single-precision division:
+       r:=0, j:=m,
+       while j>0 do
+         {Here (q[m-1]*beta^(m-1)+...+q[j]*beta^j) * b[0] + r*beta^j =
+               = a[m-1]*beta^(m-1)+...+a[j]*beta^j und 0<=r<b[0]<beta}
+         j:=j-1, r:=r*beta+a[j], q[j]:=floor(r/b[0]), r:=r-b[0]*q[j].
+       Normalise [q[m-1],...,q[0]], yields q.
+     If m>=n>1, perform a multiple-precision division:
+       We have a/b < beta^(m-n+1).
+       s:=intDsize-1-(highest bit in b[n-1]), 0<=s<intDsize.
+       Shift a and b left by s bits, copying them. r:=a.
+       r=[r[m],...,r[0]], b=[b[n-1],...,b[0]] with b[n-1]>=beta/2.
+       For j=m-n,...,0: {Here 0 <= r < b*beta^(j+1).}
+         Compute q* :
+           q* := floor((r[j+n]*beta+r[j+n-1])/b[n-1]).
+           In case of overflow (q* >= beta) set q* := beta-1.
+           Compute c2 := ((r[j+n]*beta+r[j+n-1]) - q* * b[n-1])*beta + r[j+n-2]
+           and c3 := b[n-2] * q*.
+           {We have 0 <= c2 < 2*beta^2, even 0 <= c2 < beta^2 if no overflow
+            occurred.  Furthermore 0 <= c3 < beta^2.
+            If there was overflow and
+            r[j+n]*beta+r[j+n-1] - q* * b[n-1] >= beta, i.e. c2 >= beta^2,
+            the next test can be skipped.}
+           While c3 > c2, {Here 0 <= c2 < c3 < beta^2}
+             Put q* := q* - 1, c2 := c2 + b[n-1]*beta, c3 := c3 - b[n-2].
+           If q* > 0:
+             Put r := r - b * q* * beta^j. In detail:
+               [r[n+j],...,r[j]] := [r[n+j],...,r[j]] - q* * [b[n-1],...,b[0]].
+               hence: u:=0, for i:=0 to n-1 do
+                              u := u + q* * b[i],
+                              r[j+i]:=r[j+i]-(u mod beta) (+ beta, if carry),
+                              u:=u div beta (+ 1, if carry in subtraction)
+                      r[n+j]:=r[n+j]-u.
+               {Since always u = (q* * [b[i-1],...,b[0]] div beta^i) + 1
+                               < q* + 1 <= beta,
+                the carry u does not overflow.}
+             If a negative carry occurs, put q* := q* - 1
+               and [r[n+j],...,r[j]] := [r[n+j],...,r[j]] + [0,b[n-1],...,b[0]].
+         Set q[j] := q*.
+       Normalise [q[m-n],..,q[0]]; this yields the quotient q.
+       Shift [r[n-1],...,r[0]] right by s bits and normalise; this yields the
+       rest r.
+       The room for q[j] can be allocated at the memory location of r[n+j].
+     Finally, round-to-even:
+       Shift r left by 1 bit.
+       If r > b or if r = b and q[0] is odd, q := q+1.
+   */
+  const mp_limb_t *a_ptr = a.limbs;
+  size_t a_len = a.nlimbs;
+  const mp_limb_t *b_ptr = b.limbs;
+  size_t b_len = b.nlimbs;
+  mp_limb_t *roomptr;
+  mp_limb_t *tmp_roomptr = NULL;
+  mp_limb_t *q_ptr;
+  size_t q_len;
+  mp_limb_t *r_ptr;
+  size_t r_len;
+
+  /* Allocate room for a_len+2 digits.
+     (Need a_len+1 digits for the real division and 1 more digit for the
+     final rounding of q.)  */
+  roomptr = (mp_limb_t *) malloc ((a_len + 2) * sizeof (mp_limb_t));
+  if (roomptr == NULL)
+    return NULL;
+
+  /* Normalise a.  */
+  while (a_len > 0 && a_ptr[a_len - 1] == 0)
+    a_len--;
+
+  /* Normalise b.  */
+  for (;;)
+    {
+      if (b_len == 0)
+        /* Division by zero.  */
+        abort ();
+      if (b_ptr[b_len - 1] == 0)
+        b_len--;
+      else
+        break;
+    }
+
+  /* Here m = a_len >= 0 and n = b_len > 0.  */
+
+  if (a_len < b_len)
+    {
+      /* m<n: trivial case.  q=0, r := copy of a.  */
+      r_ptr = roomptr;
+      r_len = a_len;
+      memcpy (r_ptr, a_ptr, a_len * sizeof (mp_limb_t));
+      q_ptr = roomptr + a_len;
+      q_len = 0;
+    }
+  else if (b_len == 1)
+    {
+      /* n=1: single precision division.
+         beta^(m-1) <= a < beta^m  ==>  beta^(m-2) <= a/b < beta^m  */
+      r_ptr = roomptr;
+      q_ptr = roomptr + 1;
+      {
+        mp_limb_t den = b_ptr[0];
+        mp_limb_t remainder = 0;
+        const mp_limb_t *sourceptr = a_ptr + a_len;
+        mp_limb_t *destptr = q_ptr + a_len;
+        size_t count;
+        for (count = a_len; count > 0; count--)
+          {
+            mp_twolimb_t num =
+              ((mp_twolimb_t) remainder << GMP_LIMB_BITS) | *--sourceptr;
+            *--destptr = num / den;
+            remainder = num % den;
+          }
+        /* Normalise and store r.  */
+        if (remainder > 0)
+          {
+            r_ptr[0] = remainder;
+            r_len = 1;
+          }
+        else
+          r_len = 0;
+        /* Normalise q.  */
+        q_len = a_len;
+        if (q_ptr[q_len - 1] == 0)
+          q_len--;
+      }
+    }
+  else
+    {
+      /* n>1: multiple precision division.
+         beta^(m-1) <= a < beta^m, beta^(n-1) <= b < beta^n  ==>
+         beta^(m-n-1) <= a/b < beta^(m-n+1).  */
+      /* Determine s.  */
+      size_t s;
+      {
+        mp_limb_t msd = b_ptr[b_len - 1]; /* = b[n-1], > 0 */
+        /* Determine s = GMP_LIMB_BITS - integer_length (msd).
+           Code copied from gnulib's integer_length.c.  */
+# if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) \
+     || (__clang_major__ >= 4)
+        s = __builtin_clz (msd);
+# else
+#  if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT
+        if (GMP_LIMB_BITS <= DBL_MANT_BIT)
+          {
+            /* Use 'double' operations.
+               Assumes an IEEE 754 'double' implementation.  */
+#   define DBL_EXP_MASK ((DBL_MAX_EXP - DBL_MIN_EXP) | 7)
+#   define DBL_EXP_BIAS (DBL_EXP_MASK / 2 - 1)
+#   define NWORDS \
+     ((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
+            union { double value; unsigned int word[NWORDS]; } m;
+
+            /* Use a single integer to floating-point conversion.  */
+            m.value = msd;
+
+            s = GMP_LIMB_BITS
+                - (((m.word[DBL_EXPBIT0_WORD] >> DBL_EXPBIT0_BIT) & DBL_EXP_MASK)
+                   - DBL_EXP_BIAS);
+          }
+        else
+#   undef NWORDS
+#  endif
+          {
+            s = 31;
+            if (msd >= 0x10000)
+              {
+                msd = msd >> 16;
+                s -= 16;
+              }
+            if (msd >= 0x100)
+              {
+                msd = msd >> 8;
+                s -= 8;
+              }
+            if (msd >= 0x10)
+              {
+                msd = msd >> 4;
+                s -= 4;
+              }
+            if (msd >= 0x4)
+              {
+                msd = msd >> 2;
+                s -= 2;
+              }
+            if (msd >= 0x2)
+              {
+                msd = msd >> 1;
+                s -= 1;
+              }
+          }
+# endif
+      }
+      /* 0 <= s < GMP_LIMB_BITS.
+         Copy b, shifting it left by s bits.  */
+      if (s > 0)
+        {
+          tmp_roomptr = (mp_limb_t *) malloc (b_len * sizeof (mp_limb_t));
+          if (tmp_roomptr == NULL)
+            {
+              free (roomptr);
+              return NULL;
+            }
+          {
+            const mp_limb_t *sourceptr = b_ptr;
+            mp_limb_t *destptr = tmp_roomptr;
+            mp_twolimb_t accu = 0;
+            size_t count;
+            for (count = b_len; count > 0; count--)
+              {
+                accu += (mp_twolimb_t) *sourceptr++ << s;
+                *destptr++ = (mp_limb_t) accu;
+                accu = accu >> GMP_LIMB_BITS;
+              }
+            /* accu must be zero, since that was how s was determined.  */
+            if (accu != 0)
+              abort ();
+          }
+          b_ptr = tmp_roomptr;
+        }
+      /* Copy a, shifting it left by s bits, yields r.
+         Memory layout:
+         At the beginning: r = roomptr[0..a_len],
+         at the end: r = roomptr[0..b_len-1], q = roomptr[b_len..a_len]  */
+      r_ptr = roomptr;
+      if (s == 0)
+        {
+          memcpy (r_ptr, a_ptr, a_len * sizeof (mp_limb_t));
+          r_ptr[a_len] = 0;
+        }
+      else
+        {
+          const mp_limb_t *sourceptr = a_ptr;
+          mp_limb_t *destptr = r_ptr;
+          mp_twolimb_t accu = 0;
+          size_t count;
+          for (count = a_len; count > 0; count--)
+            {
+              accu += (mp_twolimb_t) *sourceptr++ << s;
+              *destptr++ = (mp_limb_t) accu;
+              accu = accu >> GMP_LIMB_BITS;
+            }
+          *destptr++ = (mp_limb_t) accu;
+        }
+      q_ptr = roomptr + b_len;
+      q_len = a_len - b_len + 1; /* q will have m-n+1 limbs */
+      {
+        size_t j = a_len - b_len; /* m-n */
+        mp_limb_t b_msd = b_ptr[b_len - 1]; /* b[n-1] */
+        mp_limb_t b_2msd = b_ptr[b_len - 2]; /* b[n-2] */
+        mp_twolimb_t b_msdd = /* b[n-1]*beta+b[n-2] */
+          ((mp_twolimb_t) b_msd << GMP_LIMB_BITS) | b_2msd;
+        /* Division loop, traversed m-n+1 times.
+           j counts down, b is unchanged, beta/2 <= b[n-1] < beta.  */
+        for (;;)
+          {
+            mp_limb_t q_star;
+            mp_limb_t c1;
+            if (r_ptr[j + b_len] < b_msd) /* r[j+n] < b[n-1] ? */
+              {
+                /* Divide r[j+n]*beta+r[j+n-1] by b[n-1], no overflow.  */
+                mp_twolimb_t num =
+                  ((mp_twolimb_t) r_ptr[j + b_len] << GMP_LIMB_BITS)
+                  | r_ptr[j + b_len - 1];
+                q_star = num / b_msd;
+                c1 = num % b_msd;
+              }
+            else
+              {
+                /* Overflow, hence r[j+n]*beta+r[j+n-1] >= beta*b[n-1].  */
+                q_star = (mp_limb_t)~(mp_limb_t)0; /* q* = beta-1 */
+                /* Test whether r[j+n]*beta+r[j+n-1] - (beta-1)*b[n-1] >= beta
+                   <==> r[j+n]*beta+r[j+n-1] + b[n-1] >= beta*b[n-1]+beta
+                   <==> b[n-1] < floor((r[j+n]*beta+r[j+n-1]+b[n-1])/beta)
+                        {<= beta !}.
+                   If yes, jump directly to the subtraction loop.
+                   (Otherwise, r[j+n]*beta+r[j+n-1] - (beta-1)*b[n-1] < beta
+                    <==> floor((r[j+n]*beta+r[j+n-1]+b[n-1])/beta) = b[n-1] ) */
+                if (r_ptr[j + b_len] > b_msd
+                    || (c1 = r_ptr[j + b_len - 1] + b_msd) < b_msd)
+                  /* r[j+n] >= b[n-1]+1 or
+                     r[j+n] = b[n-1] and the addition r[j+n-1]+b[n-1] gives a
+                     carry.  */
+                  goto subtract;
+              }
+            /* q_star = q*,
+               c1 = (r[j+n]*beta+r[j+n-1]) - q* * b[n-1] (>=0, <beta).  */
+            {
+              mp_twolimb_t c2 = /* c1*beta+r[j+n-2] */
+                ((mp_twolimb_t) c1 << GMP_LIMB_BITS) | r_ptr[j + b_len - 2];
+              mp_twolimb_t c3 = /* b[n-2] * q* */
+                (mp_twolimb_t) b_2msd * (mp_twolimb_t) q_star;
+              /* While c2 < c3, increase c2 and decrease c3.
+                 Consider c3-c2.  While it is > 0, decrease it by
+                 b[n-1]*beta+b[n-2].  Because of b[n-1]*beta+b[n-2] >= beta^2/2
+                 this can happen only twice.  */
+              if (c3 > c2)
+                {
+                  q_star = q_star - 1; /* q* := q* - 1 */
+                  if (c3 - c2 > b_msdd)
+                    q_star = q_star - 1; /* q* := q* - 1 */
+                }
+            }
+            if (q_star > 0)
+              subtract:
+              {
+                /* Subtract r := r - b * q* * beta^j.  */
+                mp_limb_t cr;
+                {
+                  const mp_limb_t *sourceptr = b_ptr;
+                  mp_limb_t *destptr = r_ptr + j;
+                  mp_twolimb_t carry = 0;
+                  size_t count;
+                  for (count = b_len; count > 0; count--)
+                    {
+                      /* Here 0 <= carry <= q*.  */
+                      carry =
+                        carry
+                        + (mp_twolimb_t) q_star * (mp_twolimb_t) *sourceptr++
+                        + (mp_limb_t) ~(*destptr);
+                      /* Here 0 <= carry <= beta*q* + beta-1.  */
+                      *destptr++ = ~(mp_limb_t) carry;
+                      carry = carry >> GMP_LIMB_BITS; /* <= q* */
+                    }
+                  cr = (mp_limb_t) carry;
+                }
+                /* Subtract cr from r_ptr[j + b_len], then forget about
+                   r_ptr[j + b_len].  */
+                if (cr > r_ptr[j + b_len])
+                  {
+                    /* Subtraction gave a carry.  */
+                    q_star = q_star - 1; /* q* := q* - 1 */
+                    /* Add b back.  */
+                    {
+                      const mp_limb_t *sourceptr = b_ptr;
+                      mp_limb_t *destptr = r_ptr + j;
+                      mp_limb_t carry = 0;
+                      size_t count;
+                      for (count = b_len; count > 0; count--)
+                        {
+                          mp_limb_t source1 = *sourceptr++;
+                          mp_limb_t source2 = *destptr;
+                          *destptr++ = source1 + source2 + carry;
+                          carry =
+                            (carry
+                             ? source1 >= (mp_limb_t) ~source2
+                             : source1 > (mp_limb_t) ~source2);
+                        }
+                    }
+                    /* Forget about the carry and about r[j+n].  */
+                  }
+              }
+            /* q* is determined.  Store it as q[j].  */
+            q_ptr[j] = q_star;
+            if (j == 0)
+              break;
+            j--;
+          }
+      }
+      r_len = b_len;
+      /* Normalise q.  */
+      if (q_ptr[q_len - 1] == 0)
+        q_len--;
+# if 0 /* Not needed here, since we need r only to compare it with b/2, and
+          b is shifted left by s bits.  */
+      /* Shift r right by s bits.  */
+      if (s > 0)
+        {
+          mp_limb_t ptr = r_ptr + r_len;
+          mp_twolimb_t accu = 0;
+          size_t count;
+          for (count = r_len; count > 0; count--)
+            {
+              accu = (mp_twolimb_t) (mp_limb_t) accu << GMP_LIMB_BITS;
+              accu += (mp_twolimb_t) *--ptr << (GMP_LIMB_BITS - s);
+              *ptr = (mp_limb_t) (accu >> GMP_LIMB_BITS);
+            }
+        }
+# endif
+      /* Normalise r.  */
+      while (r_len > 0 && r_ptr[r_len - 1] == 0)
+        r_len--;
+    }
+  /* Compare r << 1 with b.  */
+  if (r_len > b_len)
+    goto increment_q;
+  {
+    size_t i;
+    for (i = b_len;;)
+      {
+        mp_limb_t r_i =
+          (i <= r_len && i > 0 ? r_ptr[i - 1] >> (GMP_LIMB_BITS - 1) : 0)
+          | (i < r_len ? r_ptr[i] << 1 : 0);
+        mp_limb_t b_i = (i < b_len ? b_ptr[i] : 0);
+        if (r_i > b_i)
+          goto increment_q;
+        if (r_i < b_i)
+          goto keep_q;
+        if (i == 0)
+          break;
+        i--;
+      }
+  }
+  if (q_len > 0 && ((q_ptr[0] & 1) != 0))
+    /* q is odd.  */
+    increment_q:
+    {
+      size_t i;
+      for (i = 0; i < q_len; i++)
+        if (++(q_ptr[i]) != 0)
+          goto keep_q;
+      q_ptr[q_len++] = 1;
+    }
+  keep_q:
+  if (tmp_roomptr != NULL)
+    free (tmp_roomptr);
+  q->limbs = q_ptr;
+  q->nlimbs = q_len;
+  return roomptr;
+}
+
+/* Convert a bignum a >= 0, multiplied with 10^extra_zeroes, to decimal
+   representation.
+   Destroys the contents of a.
+   Return the allocated memory - containing the decimal digits in low-to-high
+   order, terminated with a NUL character - in case of success, NULL in case
+   of memory allocation failure.  */
+static char *
+convert_to_decimal (mpn_t a, size_t extra_zeroes)
+{
+  mp_limb_t *a_ptr = a.limbs;
+  size_t a_len = a.nlimbs;
+  /* 0.03345 is slightly larger than log(2)/(9*log(10)).  */
+  size_t c_len = 9 * ((size_t)(a_len * (GMP_LIMB_BITS * 0.03345f)) + 1);
+  /* We need extra_zeroes bytes for zeroes, followed by c_len bytes for the
+     digits of a, followed by 1 byte for the terminating NUL.  */
+  char *c_ptr = (char *) malloc (xsum (xsum (extra_zeroes, c_len), 1));
+  if (c_ptr != NULL)
+    {
+      char *d_ptr = c_ptr;
+      for (; extra_zeroes > 0; extra_zeroes--)
+        *d_ptr++ = '0';
+      while (a_len > 0)
+        {
+          /* Divide a by 10^9, in-place.  */
+          mp_limb_t remainder = 0;
+          mp_limb_t *ptr = a_ptr + a_len;
+          size_t count;
+          for (count = a_len; count > 0; count--)
+            {
+              mp_twolimb_t num =
+                ((mp_twolimb_t) remainder << GMP_LIMB_BITS) | *--ptr;
+              *ptr = num / 1000000000;
+              remainder = num % 1000000000;
+            }
+          /* Store the remainder as 9 decimal digits.  */
+          for (count = 9; count > 0; count--)
+            {
+              *d_ptr++ = '0' + (remainder % 10);
+              remainder = remainder / 10;
+            }
+          /* Normalize a.  */
+          if (a_ptr[a_len - 1] == 0)
+            a_len--;
+        }
+      /* Remove leading zeroes.  */
+      while (d_ptr > c_ptr && d_ptr[-1] == '0')
+        d_ptr--;
+      /* But keep at least one zero.  */
+      if (d_ptr == c_ptr)
+        *d_ptr++ = '0';
+      /* Terminate the string.  */
+      *d_ptr = '\0';
+    }
+  return c_ptr;
+}
+
+# if NEED_PRINTF_LONG_DOUBLE
+
+/* Assuming x is finite and >= 0:
+   write x as x = 2^e * m, where m is a bignum.
+   Return the allocated memory in case of success, NULL in case of memory
+   allocation failure.  */
+static void *
+decode_long_double (long double x, int *ep, mpn_t *mp)
+{
+  mpn_t m;
+  int exp;
+  long double y;
+  size_t i;
+
+  /* Allocate memory for result.  */
+  m.nlimbs = (LDBL_MANT_BIT + GMP_LIMB_BITS - 1) / GMP_LIMB_BITS;
+  m.limbs = (mp_limb_t *) malloc (m.nlimbs * sizeof (mp_limb_t));
+  if (m.limbs == NULL)
+    return NULL;
+  /* Split into exponential part and mantissa.  */
+  y = frexpl (x, &exp);
+  if (!(y >= 0.0L && y < 1.0L))
+    abort ();
+  /* x = 2^exp * y = 2^(exp - LDBL_MANT_BIT) * (y * 2^LDBL_MANT_BIT), and the
+     latter is an integer.  */
+  /* Convert the mantissa (y * 2^LDBL_MANT_BIT) to a sequence of limbs.
+     I'm not sure whether it's safe to cast a 'long double' value between
+     2^31 and 2^32 to 'unsigned int', therefore play safe and cast only
+     'long double' values between 0 and 2^16 (to 'unsigned int' or 'int',
+     doesn't matter).  */
+#  if (LDBL_MANT_BIT % GMP_LIMB_BITS) != 0
+#   if (LDBL_MANT_BIT % GMP_LIMB_BITS) > GMP_LIMB_BITS / 2
+    {
+      mp_limb_t hi, lo;
+      y *= (mp_limb_t) 1 << (LDBL_MANT_BIT % (GMP_LIMB_BITS / 2));
+      hi = (int) y;
+      y -= hi;
+      if (!(y >= 0.0L && y < 1.0L))
+        abort ();
+      y *= (mp_limb_t) 1 << (GMP_LIMB_BITS / 2);
+      lo = (int) y;
+      y -= lo;
+      if (!(y >= 0.0L && y < 1.0L))
+        abort ();
+      m.limbs[LDBL_MANT_BIT / GMP_LIMB_BITS] = (hi << (GMP_LIMB_BITS / 2)) | lo;
+    }
+#   else
+    {
+      mp_limb_t d;
+      y *= (mp_limb_t) 1 << (LDBL_MANT_BIT % GMP_LIMB_BITS);
+      d = (int) y;
+      y -= d;
+      if (!(y >= 0.0L && y < 1.0L))
+        abort ();
+      m.limbs[LDBL_MANT_BIT / GMP_LIMB_BITS] = d;
+    }
+#   endif
+#  endif
+  for (i = LDBL_MANT_BIT / GMP_LIMB_BITS; i > 0; )
+    {
+      mp_limb_t hi, lo;
+      y *= (mp_limb_t) 1 << (GMP_LIMB_BITS / 2);
+      hi = (int) y;
+      y -= hi;
+      if (!(y >= 0.0L && y < 1.0L))
+        abort ();
+      y *= (mp_limb_t) 1 << (GMP_LIMB_BITS / 2);
+      lo = (int) y;
+      y -= lo;
+      if (!(y >= 0.0L && y < 1.0L))
+        abort ();
+      m.limbs[--i] = (hi << (GMP_LIMB_BITS / 2)) | lo;
+    }
+#  if 0 /* On FreeBSD 6.1/x86, 'long double' numbers sometimes have excess
+           precision.  */
+  if (!(y == 0.0L))
+    abort ();
+#  endif
+  /* Normalise.  */
+  while (m.nlimbs > 0 && m.limbs[m.nlimbs - 1] == 0)
+    m.nlimbs--;
+  *mp = m;
+  *ep = exp - LDBL_MANT_BIT;
+  return m.limbs;
+}
+
+# endif
+
+# if NEED_PRINTF_DOUBLE
+
+/* Assuming x is finite and >= 0:
+   write x as x = 2^e * m, where m is a bignum.
+   Return the allocated memory in case of success, NULL in case of memory
+   allocation failure.  */
+static void *
+decode_double (double x, int *ep, mpn_t *mp)
+{
+  mpn_t m;
+  int exp;
+  double y;
+  size_t i;
+
+  /* Allocate memory for result.  */
+  m.nlimbs = (DBL_MANT_BIT + GMP_LIMB_BITS - 1) / GMP_LIMB_BITS;
+  m.limbs = (mp_limb_t *) malloc (m.nlimbs * sizeof (mp_limb_t));
+  if (m.limbs == NULL)
+    return NULL;
+  /* Split into exponential part and mantissa.  */
+  y = frexp (x, &exp);
+  if (!(y >= 0.0 && y < 1.0))
+    abort ();
+  /* x = 2^exp * y = 2^(exp - DBL_MANT_BIT) * (y * 2^DBL_MANT_BIT), and the
+     latter is an integer.  */
+  /* Convert the mantissa (y * 2^DBL_MANT_BIT) to a sequence of limbs.
+     I'm not sure whether it's safe to cast a 'double' value between
+     2^31 and 2^32 to 'unsigned int', therefore play safe and cast only
+     'double' values between 0 and 2^16 (to 'unsigned int' or 'int',
+     doesn't matter).  */
+#  if (DBL_MANT_BIT % GMP_LIMB_BITS) != 0
+#   if (DBL_MANT_BIT % GMP_LIMB_BITS) > GMP_LIMB_BITS / 2
+    {
+      mp_limb_t hi, lo;
+      y *= (mp_limb_t) 1 << (DBL_MANT_BIT % (GMP_LIMB_BITS / 2));
+      hi = (int) y;
+      y -= hi;
+      if (!(y >= 0.0 && y < 1.0))
+        abort ();
+      y *= (mp_limb_t) 1 << (GMP_LIMB_BITS / 2);
+      lo = (int) y;
+      y -= lo;
+      if (!(y >= 0.0 && y < 1.0))
+        abort ();
+      m.limbs[DBL_MANT_BIT / GMP_LIMB_BITS] = (hi << (GMP_LIMB_BITS / 2)) | lo;
+    }
+#   else
+    {
+      mp_limb_t d;
+      y *= (mp_limb_t) 1 << (DBL_MANT_BIT % GMP_LIMB_BITS);
+      d = (int) y;
+      y -= d;
+      if (!(y >= 0.0 && y < 1.0))
+        abort ();
+      m.limbs[DBL_MANT_BIT / GMP_LIMB_BITS] = d;
+    }
+#   endif
+#  endif
+  for (i = DBL_MANT_BIT / GMP_LIMB_BITS; i > 0; )
+    {
+      mp_limb_t hi, lo;
+      y *= (mp_limb_t) 1 << (GMP_LIMB_BITS / 2);
+      hi = (int) y;
+      y -= hi;
+      if (!(y >= 0.0 && y < 1.0))
+        abort ();
+      y *= (mp_limb_t) 1 << (GMP_LIMB_BITS / 2);
+      lo = (int) y;
+      y -= lo;
+      if (!(y >= 0.0 && y < 1.0))
+        abort ();
+      m.limbs[--i] = (hi << (GMP_LIMB_BITS / 2)) | lo;
+    }
+  if (!(y == 0.0))
+    abort ();
+  /* Normalise.  */
+  while (m.nlimbs > 0 && m.limbs[m.nlimbs - 1] == 0)
+    m.nlimbs--;
+  *mp = m;
+  *ep = exp - DBL_MANT_BIT;
+  return m.limbs;
+}
+
+# endif
+
+/* Assuming x = 2^e * m is finite and >= 0, and n is an integer:
+   Returns the decimal representation of round (x * 10^n).
+   Return the allocated memory - containing the decimal digits in low-to-high
+   order, terminated with a NUL character - in case of success, NULL in case
+   of memory allocation failure.  */
+static char *
+scale10_round_decimal_decoded (int e, mpn_t m, void *memory, int n)
+{
+  int s;
+  size_t extra_zeroes;
+  unsigned int abs_n;
+  unsigned int abs_s;
+  mp_limb_t *pow5_ptr;
+  size_t pow5_len;
+  unsigned int s_limbs;
+  unsigned int s_bits;
+  mpn_t pow5;
+  mpn_t z;
+  void *z_memory;
+  char *digits;
+
+  if (memory == NULL)
+    return NULL;
+  /* x = 2^e * m, hence
+     y = round (2^e * 10^n * m) = round (2^(e+n) * 5^n * m)
+       = round (2^s * 5^n * m).  */
+  s = e + n;
+  extra_zeroes = 0;
+  /* Factor out a common power of 10 if possible.  */
+  if (s > 0 && n > 0)
+    {
+      extra_zeroes = (s < n ? s : n);
+      s -= extra_zeroes;
+      n -= extra_zeroes;
+    }
+  /* Here y = round (2^s * 5^n * m) * 10^extra_zeroes.
+     Before converting to decimal, we need to compute
+     z = round (2^s * 5^n * m).  */
+  /* Compute 5^|n|, possibly shifted by |s| bits if n and s have the same
+     sign.  2.322 is slightly larger than log(5)/log(2).  */
+  abs_n = (n >= 0 ? n : -n);
+  abs_s = (s >= 0 ? s : -s);
+  pow5_ptr = (mp_limb_t *) malloc (((int)(abs_n * (2.322f / GMP_LIMB_BITS)) + 1
+                                    + abs_s / GMP_LIMB_BITS + 1)
+                                   * sizeof (mp_limb_t));
+  if (pow5_ptr == NULL)
+    {
+      free (memory);
+      return NULL;
+    }
+  /* Initialize with 1.  */
+  pow5_ptr[0] = 1;
+  pow5_len = 1;
+  /* Multiply with 5^|n|.  */
+  if (abs_n > 0)
+    {
+      static mp_limb_t const small_pow5[13 + 1] =
+        {
+          1, 5, 25, 125, 625, 3125, 15625, 78125, 390625, 1953125, 9765625,
+          48828125, 244140625, 1220703125
+        };
+      unsigned int n13;
+      for (n13 = 0; n13 <= abs_n; n13 += 13)
+        {
+          mp_limb_t digit1 = small_pow5[n13 + 13 <= abs_n ? 13 : abs_n - n13];
+          size_t j;
+          mp_twolimb_t carry = 0;
+          for (j = 0; j < pow5_len; j++)
+            {
+              mp_limb_t digit2 = pow5_ptr[j];
+              carry += (mp_twolimb_t) digit1 * (mp_twolimb_t) digit2;
+              pow5_ptr[j] = (mp_limb_t) carry;
+              carry = carry >> GMP_LIMB_BITS;
+            }
+          if (carry > 0)
+            pow5_ptr[pow5_len++] = (mp_limb_t) carry;
+        }
+    }
+  s_limbs = abs_s / GMP_LIMB_BITS;
+  s_bits = abs_s % GMP_LIMB_BITS;
+  if (n >= 0 ? s >= 0 : s <= 0)
+    {
+      /* Multiply with 2^|s|.  */
+      if (s_bits > 0)
+        {
+          mp_limb_t *ptr = pow5_ptr;
+          mp_twolimb_t accu = 0;
+          size_t count;
+          for (count = pow5_len; count > 0; count--)
+            {
+              accu += (mp_twolimb_t) *ptr << s_bits;
+              *ptr++ = (mp_limb_t) accu;
+              accu = accu >> GMP_LIMB_BITS;
+            }
+          if (accu > 0)
+            {
+              *ptr = (mp_limb_t) accu;
+              pow5_len++;
+            }
+        }
+      if (s_limbs > 0)
+        {
+          size_t count;
+          for (count = pow5_len; count > 0;)
+            {
+              count--;
+              pow5_ptr[s_limbs + count] = pow5_ptr[count];
+            }
+          for (count = s_limbs; count > 0;)
+            {
+              count--;
+              pow5_ptr[count] = 0;
+            }
+          pow5_len += s_limbs;
+        }
+      pow5.limbs = pow5_ptr;
+      pow5.nlimbs = pow5_len;
+      if (n >= 0)
+        {
+          /* Multiply m with pow5.  No division needed.  */
+          z_memory = multiply (m, pow5, &z);
+        }
+      else
+        {
+          /* Divide m by pow5 and round.  */
+          z_memory = divide (m, pow5, &z);
+        }
+    }
+  else
+    {
+      pow5.limbs = pow5_ptr;
+      pow5.nlimbs = pow5_len;
+      if (n >= 0)
+        {
+          /* n >= 0, s < 0.
+             Multiply m with pow5, then divide by 2^|s|.  */
+          mpn_t numerator;
+          mpn_t denominator;
+          void *tmp_memory;
+          tmp_memory = multiply (m, pow5, &numerator);
+          if (tmp_memory == NULL)
+            {
+              free (pow5_ptr);
+              free (memory);
+              return NULL;
+            }
+          /* Construct 2^|s|.  */
+          {
+            mp_limb_t *ptr = pow5_ptr + pow5_len;
+            size_t i;
+            for (i = 0; i < s_limbs; i++)
+              ptr[i] = 0;
+            ptr[s_limbs] = (mp_limb_t) 1 << s_bits;
+            denominator.limbs = ptr;
+            denominator.nlimbs = s_limbs + 1;
+          }
+          z_memory = divide (numerator, denominator, &z);
+          free (tmp_memory);
+        }
+      else
+        {
+          /* n < 0, s > 0.
+             Multiply m with 2^s, then divide by pow5.  */
+          mpn_t numerator;
+          mp_limb_t *num_ptr;
+          num_ptr = (mp_limb_t *) malloc ((m.nlimbs + s_limbs + 1)
+                                          * sizeof (mp_limb_t));
+          if (num_ptr == NULL)
+            {
+              free (pow5_ptr);
+              free (memory);
+              return NULL;
+            }
+          {
+            mp_limb_t *destptr = num_ptr;
+            {
+              size_t i;
+              for (i = 0; i < s_limbs; i++)
+                *destptr++ = 0;
+            }
+            if (s_bits > 0)
+              {
+                const mp_limb_t *sourceptr = m.limbs;
+                mp_twolimb_t accu = 0;
+                size_t count;
+                for (count = m.nlimbs; count > 0; count--)
+                  {
+                    accu += (mp_twolimb_t) *sourceptr++ << s_bits;
+                    *destptr++ = (mp_limb_t) accu;
+                    accu = accu >> GMP_LIMB_BITS;
+                  }
+                if (accu > 0)
+                  *destptr++ = (mp_limb_t) accu;
+              }
+            else
+              {
+                const mp_limb_t *sourceptr = m.limbs;
+                size_t count;
+                for (count = m.nlimbs; count > 0; count--)
+                  *destptr++ = *sourceptr++;
+              }
+            numerator.limbs = num_ptr;
+            numerator.nlimbs = destptr - num_ptr;
+          }
+          z_memory = divide (numerator, pow5, &z);
+          free (num_ptr);
+        }
+    }
+  free (pow5_ptr);
+  free (memory);
+
+  /* Here y = round (x * 10^n) = z * 10^extra_zeroes.  */
+
+  if (z_memory == NULL)
+    return NULL;
+  digits = convert_to_decimal (z, extra_zeroes);
+  free (z_memory);
+  return digits;
+}
+
+# if NEED_PRINTF_LONG_DOUBLE
+
+/* Assuming x is finite and >= 0, and n is an integer:
+   Returns the decimal representation of round (x * 10^n).
+   Return the allocated memory - containing the decimal digits in low-to-high
+   order, terminated with a NUL character - in case of success, NULL in case
+   of memory allocation failure.  */
+static char *
+scale10_round_decimal_long_double (long double x, int n)
+{
+  int e IF_LINT(= 0);
+  mpn_t m;
+  void *memory = decode_long_double (x, &e, &m);
+  return scale10_round_decimal_decoded (e, m, memory, n);
+}
+
+# endif
+
+# if NEED_PRINTF_DOUBLE
+
+/* Assuming x is finite and >= 0, and n is an integer:
+   Returns the decimal representation of round (x * 10^n).
+   Return the allocated memory - containing the decimal digits in low-to-high
+   order, terminated with a NUL character - in case of success, NULL in case
+   of memory allocation failure.  */
+static char *
+scale10_round_decimal_double (double x, int n)
+{
+  int e IF_LINT(= 0);
+  mpn_t m;
+  void *memory = decode_double (x, &e, &m);
+  return scale10_round_decimal_decoded (e, m, memory, n);
+}
+
+# endif
+
+# if NEED_PRINTF_LONG_DOUBLE
+
+/* Assuming x is finite and > 0:
+   Return an approximation for n with 10^n <= x < 10^(n+1).
+   The approximation is usually the right n, but may be off by 1 sometimes.  */
+static int
+floorlog10l (long double x)
+{
+  int exp;
+  long double y;
+  double z;
+  double l;
+
+  /* Split into exponential part and mantissa.  */
+  y = frexpl (x, &exp);
+  if (!(y >= 0.0L && y < 1.0L))
+    abort ();
+  if (y == 0.0L)
+    return INT_MIN;
+  if (y < 0.5L)
+    {
+      while (y < (1.0L / (1 << (GMP_LIMB_BITS / 2)) / (1 << (GMP_LIMB_BITS / 2))))
+        {
+          y *= 1.0L * (1 << (GMP_LIMB_BITS / 2)) * (1 << (GMP_LIMB_BITS / 2));
+          exp -= GMP_LIMB_BITS;
+        }
+      if (y < (1.0L / (1 << 16)))
+        {
+          y *= 1.0L * (1 << 16);
+          exp -= 16;
+        }
+      if (y < (1.0L / (1 << 8)))
+        {
+          y *= 1.0L * (1 << 8);
+          exp -= 8;
+        }
+      if (y < (1.0L / (1 << 4)))
+        {
+          y *= 1.0L * (1 << 4);
+          exp -= 4;
+        }
+      if (y < (1.0L / (1 << 2)))
+        {
+          y *= 1.0L * (1 << 2);
+          exp -= 2;
+        }
+      if (y < (1.0L / (1 << 1)))
+        {
+          y *= 1.0L * (1 << 1);
+          exp -= 1;
+        }
+    }
+  if (!(y >= 0.5L && y < 1.0L))
+    abort ();
+  /* Compute an approximation for l = log2(x) = exp + log2(y).  */
+  l = exp;
+  z = y;
+  if (z < 0.70710678118654752444)
+    {
+      z *= 1.4142135623730950488;
+      l -= 0.5;
+    }
+  if (z < 0.8408964152537145431)
+    {
+      z *= 1.1892071150027210667;
+      l -= 0.25;
+    }
+  if (z < 0.91700404320467123175)
+    {
+      z *= 1.0905077326652576592;
+      l -= 0.125;
+    }
+  if (z < 0.9576032806985736469)
+    {
+      z *= 1.0442737824274138403;
+      l -= 0.0625;
+    }
+  /* Now 0.95 <= z <= 1.01.  */
+  z = 1 - z;
+  /* log2(1-z) = 1/log(2) * (- z - z^2/2 - z^3/3 - z^4/4 - ...)
+     Four terms are enough to get an approximation with error < 10^-7.  */
+  l -= 1.4426950408889634074 * z * (1.0 + z * (0.5 + z * ((1.0 / 3) + z * 0.25)));
+  /* Finally multiply with log(2)/log(10), yields an approximation for
+     log10(x).  */
+  l *= 0.30102999566398119523;
+  /* Round down to the next integer.  */
+  return (int) l + (l < 0 ? -1 : 0);
+}
+
+# endif
+
+# if NEED_PRINTF_DOUBLE
+
+/* Assuming x is finite and > 0:
+   Return an approximation for n with 10^n <= x < 10^(n+1).
+   The approximation is usually the right n, but may be off by 1 sometimes.  */
+static int
+floorlog10 (double x)
+{
+  int exp;
+  double y;
+  double z;
+  double l;
+
+  /* Split into exponential part and mantissa.  */
+  y = frexp (x, &exp);
+  if (!(y >= 0.0 && y < 1.0))
+    abort ();
+  if (y == 0.0)
+    return INT_MIN;
+  if (y < 0.5)
+    {
+      while (y < (1.0 / (1 << (GMP_LIMB_BITS / 2)) / (1 << (GMP_LIMB_BITS / 2))))
+        {
+          y *= 1.0 * (1 << (GMP_LIMB_BITS / 2)) * (1 << (GMP_LIMB_BITS / 2));
+          exp -= GMP_LIMB_BITS;
+        }
+      if (y < (1.0 / (1 << 16)))
+        {
+          y *= 1.0 * (1 << 16);
+          exp -= 16;
+        }
+      if (y < (1.0 / (1 << 8)))
+        {
+          y *= 1.0 * (1 << 8);
+          exp -= 8;
+        }
+      if (y < (1.0 / (1 << 4)))
+        {
+          y *= 1.0 * (1 << 4);
+          exp -= 4;
+        }
+      if (y < (1.0 / (1 << 2)))
+        {
+          y *= 1.0 * (1 << 2);
+          exp -= 2;
+        }
+      if (y < (1.0 / (1 << 1)))
+        {
+          y *= 1.0 * (1 << 1);
+          exp -= 1;
+        }
+    }
+  if (!(y >= 0.5 && y < 1.0))
+    abort ();
+  /* Compute an approximation for l = log2(x) = exp + log2(y).  */
+  l = exp;
+  z = y;
+  if (z < 0.70710678118654752444)
+    {
+      z *= 1.4142135623730950488;
+      l -= 0.5;
+    }
+  if (z < 0.8408964152537145431)
+    {
+      z *= 1.1892071150027210667;
+      l -= 0.25;
+    }
+  if (z < 0.91700404320467123175)
+    {
+      z *= 1.0905077326652576592;
+      l -= 0.125;
+    }
+  if (z < 0.9576032806985736469)
+    {
+      z *= 1.0442737824274138403;
+      l -= 0.0625;
+    }
+  /* Now 0.95 <= z <= 1.01.  */
+  z = 1 - z;
+  /* log2(1-z) = 1/log(2) * (- z - z^2/2 - z^3/3 - z^4/4 - ...)
+     Four terms are enough to get an approximation with error < 10^-7.  */
+  l -= 1.4426950408889634074 * z * (1.0 + z * (0.5 + z * ((1.0 / 3) + z * 0.25)));
+  /* Finally multiply with log(2)/log(10), yields an approximation for
+     log10(x).  */
+  l *= 0.30102999566398119523;
+  /* Round down to the next integer.  */
+  return (int) l + (l < 0 ? -1 : 0);
+}
+
+# endif
+
+/* Tests whether a string of digits consists of exactly PRECISION zeroes and
+   a single '1' digit.  */
+static int
+is_borderline (const char *digits, size_t precision)
+{
+  for (; precision > 0; precision--, digits++)
+    if (*digits != '0')
+      return 0;
+  if (*digits != '1')
+    return 0;
+  digits++;
+  return *digits == '\0';
+}
+
+#endif
+
+#if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF
+
+/* Use a different function name, to make it possible that the 'wchar_t'
+   parametrization and the 'char' parametrization get compiled in the same
+   translation unit.  */
+# if WIDE_CHAR_VERSION
+#  define MAX_ROOM_NEEDED wmax_room_needed
+# else
+#  define MAX_ROOM_NEEDED max_room_needed
+# endif
+
+/* Returns the number of TCHAR_T units needed as temporary space for the result
+   of sprintf or SNPRINTF of a single conversion directive.  */
+static size_t
+MAX_ROOM_NEEDED (const arguments *ap, size_t arg_index, FCHAR_T conversion,
+                 arg_type type, int flags, size_t width, int has_precision,
+                 size_t precision, int pad_ourselves)
+{
+  size_t tmp_length;
+
+  switch (conversion)
+    {
+    case 'd': case 'i': case 'u':
+      if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
+        tmp_length =
+          (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
+                          * 0.30103 /* binary -> decimal */
+                         )
+          + 1; /* turn floor into ceil */
+      else if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
+        tmp_length =
+          (unsigned int) (sizeof (unsigned long) * CHAR_BIT
+                          * 0.30103 /* binary -> decimal */
+                         )
+          + 1; /* turn floor into ceil */
+      else
+        tmp_length =
+          (unsigned int) (sizeof (unsigned int) * CHAR_BIT
+                          * 0.30103 /* binary -> decimal */
+                         )
+          + 1; /* turn floor into ceil */
+      if (tmp_length < precision)
+        tmp_length = precision;
+      /* Multiply by 2, as an estimate for FLAG_GROUP.  */
+      tmp_length = xsum (tmp_length, tmp_length);
+      /* Add 1, to account for a leading sign.  */
+      tmp_length = xsum (tmp_length, 1);
+      break;
+
+    case 'o':
+      if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
+        tmp_length =
+          (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
+                          * 0.333334 /* binary -> octal */
+                         )
+          + 1; /* turn floor into ceil */
+      else if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
+        tmp_length =
+          (unsigned int) (sizeof (unsigned long) * CHAR_BIT
+                          * 0.333334 /* binary -> octal */
+                         )
+          + 1; /* turn floor into ceil */
+      else
+        tmp_length =
+          (unsigned int) (sizeof (unsigned int) * CHAR_BIT
+                          * 0.333334 /* binary -> octal */
+                         )
+          + 1; /* turn floor into ceil */
+      if (tmp_length < precision)
+        tmp_length = precision;
+      /* Add 1, to account for a leading sign.  */
+      tmp_length = xsum (tmp_length, 1);
+      break;
+
+    case 'x': case 'X':
+      if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
+        tmp_length =
+          (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
+                          * 0.25 /* binary -> hexadecimal */
+                         )
+          + 1; /* turn floor into ceil */
+      else if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
+        tmp_length =
+          (unsigned int) (sizeof (unsigned long) * CHAR_BIT
+                          * 0.25 /* binary -> hexadecimal */
+                         )
+          + 1; /* turn floor into ceil */
+      else
+        tmp_length =
+          (unsigned int) (sizeof (unsigned int) * CHAR_BIT
+                          * 0.25 /* binary -> hexadecimal */
+                         )
+          + 1; /* turn floor into ceil */
+      if (tmp_length < precision)
+        tmp_length = precision;
+      /* Add 2, to account for a leading sign or alternate form.  */
+      tmp_length = xsum (tmp_length, 2);
+      break;
+
+    case 'f': case 'F':
+      if (type == TYPE_LONGDOUBLE)
+        tmp_length =
+          (unsigned int) (LDBL_MAX_EXP
+                          * 0.30103 /* binary -> decimal */
+                          * 2 /* estimate for FLAG_GROUP */
+                         )
+          + 1 /* turn floor into ceil */
+          + 10; /* sign, decimal point etc. */
+      else
+        tmp_length =
+          (unsigned int) (DBL_MAX_EXP
+                          * 0.30103 /* binary -> decimal */
+                          * 2 /* estimate for FLAG_GROUP */
+                         )
+          + 1 /* turn floor into ceil */
+          + 10; /* sign, decimal point etc. */
+      tmp_length = xsum (tmp_length, precision);
+      break;
+
+    case 'e': case 'E': case 'g': case 'G':
+      tmp_length =
+        12; /* sign, decimal point, exponent etc. */
+      tmp_length = xsum (tmp_length, precision);
+      break;
+
+    case 'a': case 'A':
+      if (type == TYPE_LONGDOUBLE)
+        tmp_length =
+          (unsigned int) (LDBL_DIG
+                          * 0.831 /* decimal -> hexadecimal */
+                         )
+          + 1; /* turn floor into ceil */
+      else
+        tmp_length =
+          (unsigned int) (DBL_DIG
+                          * 0.831 /* decimal -> hexadecimal */
+                         )
+          + 1; /* turn floor into ceil */
+      if (tmp_length < precision)
+        tmp_length = precision;
+      /* Account for sign, decimal point etc. */
+      tmp_length = xsum (tmp_length, 12);
+      break;
+
+    case 'c':
+# if HAVE_WINT_T && !WIDE_CHAR_VERSION
+      if (type == TYPE_WIDE_CHAR)
+        {
+          tmp_length = MB_CUR_MAX;
+#  if ENABLE_WCHAR_FALLBACK
+          if (tmp_length < (sizeof (wchar_t) > 2 ? 10 : 6))
+            tmp_length = (sizeof (wchar_t) > 2 ? 10 : 6);
+#  endif
+        }
+      else
+# endif
+        tmp_length = 1;
+      break;
+
+    case 's':
+# if HAVE_WCHAR_T
+      if (type == TYPE_WIDE_STRING)
+        {
+#  if WIDE_CHAR_VERSION
+          /* ISO C says about %ls in fwprintf:
+               "If the precision is not specified or is greater than the size
+                of the array, the array shall contain a null wide character."
+             So if there is a precision, we must not use wcslen.  */
+          const wchar_t *arg = ap->arg[arg_index].a.a_wide_string;
+
+          if (has_precision)
+            tmp_length = local_wcsnlen (arg, precision);
+          else
+            tmp_length = local_wcslen (arg);
+#  else
+          /* ISO C says about %ls in fprintf:
+               "If a precision is specified, no more than that many bytes are
+                written (including shift sequences, if any), and the array
+                shall contain a null wide character if, to equal the multibyte
+                character sequence length given by the precision, the function
+                would need to access a wide character one past the end of the
+                array."
+             So if there is a precision, we must not use wcslen.  */
+          /* This case has already been handled separately in VASNPRINTF.  */
+          abort ();
+#  endif
+        }
+      else
+# endif
+        {
+# if WIDE_CHAR_VERSION
+          /* ISO C says about %s in fwprintf:
+               "If the precision is not specified or is greater than the size
+                of the converted array, the converted array shall contain a
+                null wide character."
+             So if there is a precision, we must not use strlen.  */
+          /* This case has already been handled separately in VASNPRINTF.  */
+          abort ();
+# else
+          /* ISO C says about %s in fprintf:
+               "If the precision is not specified or greater than the size of
+                the array, the array shall contain a null character."
+             So if there is a precision, we must not use strlen.  */
+          const char *arg = ap->arg[arg_index].a.a_string;
+
+          if (has_precision)
+            tmp_length = local_strnlen (arg, precision);
+          else
+            tmp_length = strlen (arg);
+# endif
+        }
+      break;
+
+    case 'p':
+      tmp_length =
+        (unsigned int) (sizeof (void *) * CHAR_BIT
+                        * 0.25 /* binary -> hexadecimal */
+                       )
+          + 1 /* turn floor into ceil */
+          + 2; /* account for leading 0x */
+      break;
+
+    default:
+      abort ();
+    }
+
+  if (!pad_ourselves)
+    {
+# if ENABLE_UNISTDIO
+      /* Padding considers the number of characters, therefore the number of
+         elements after padding may be
+           > max (tmp_length, width)
+         but is certainly
+           <= tmp_length + width.  */
+      tmp_length = xsum (tmp_length, width);
+# else
+      /* Padding considers the number of elements, says POSIX.  */
+      if (tmp_length < width)
+        tmp_length = width;
+# endif
+    }
+
+  tmp_length = xsum (tmp_length, 1); /* account for trailing NUL */
+
+  return tmp_length;
+}
+
+#endif
+
+DCHAR_T *
+VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
+            const FCHAR_T *format, va_list args)
+{
+  DIRECTIVES d;
+  arguments a;
+
+  if (PRINTF_PARSE (format, &d, &a) < 0)
+    /* errno is already set.  */
+    return NULL;
+
+  /* Frees the memory allocated by this function.  Preserves errno.  */
+#define CLEANUP() \
+  if (d.dir != d.direct_alloc_dir)                                      \
+    free (d.dir);                                                       \
+  if (a.arg != a.direct_alloc_arg)                                      \
+    free (a.arg);
+
+  if (PRINTF_FETCHARGS (args, &a) < 0)
+    {
+      CLEANUP ();
+      errno = EINVAL;
+      return NULL;
+    }
+
+  {
+    size_t buf_neededlength;
+    TCHAR_T *buf;
+    TCHAR_T *buf_malloced;
+    const FCHAR_T *cp;
+    size_t i;
+    DIRECTIVE *dp;
+    /* Output string accumulator.  */
+    DCHAR_T *result;
+    size_t allocated;
+    size_t length;
+
+    /* Allocate a small buffer that will hold a directive passed to
+       sprintf or snprintf.  */
+    buf_neededlength =
+      xsum4 (7, d.max_width_length, d.max_precision_length, 6);
+#if HAVE_ALLOCA
+    if (buf_neededlength < 4000 / sizeof (TCHAR_T))
+      {
+        buf = (TCHAR_T *) alloca (buf_neededlength * sizeof (TCHAR_T));
+        buf_malloced = NULL;
+      }
+    else
+#endif
+      {
+        size_t buf_memsize = xtimes (buf_neededlength, sizeof (TCHAR_T));
+        if (size_overflow_p (buf_memsize))
+          goto out_of_memory_1;
+        buf = (TCHAR_T *) malloc (buf_memsize);
+        if (buf == NULL)
+          goto out_of_memory_1;
+        buf_malloced = buf;
+      }
+
+    if (resultbuf != NULL)
+      {
+        result = resultbuf;
+        allocated = *lengthp;
+      }
+    else
+      {
+        result = NULL;
+        allocated = 0;
+      }
+    length = 0;
+    /* Invariants:
+       result is either == resultbuf or == NULL or malloc-allocated.
+       If length > 0, then result != NULL.  */
+
+    /* Ensures that allocated >= needed.  Aborts through a jump to
+       out_of_memory if needed is SIZE_MAX or otherwise too big.  */
+#define ENSURE_ALLOCATION_ELSE(needed, oom_statement) \
+    if ((needed) > allocated)                                                \
+      {                                                                      \
+        size_t memory_size;                                                  \
+        DCHAR_T *memory;                                                     \
+                                                                             \
+        allocated = (allocated > 0 ? xtimes (allocated, 2) : 12);            \
+        if ((needed) > allocated)                                            \
+          allocated = (needed);                                              \
+        memory_size = xtimes (allocated, sizeof (DCHAR_T));                  \
+        if (size_overflow_p (memory_size))                                   \
+          oom_statement                                                      \
+        if (result == resultbuf || result == NULL)                           \
+          memory = (DCHAR_T *) malloc (memory_size);                         \
+        else                                                                 \
+          memory = (DCHAR_T *) realloc (result, memory_size);                \
+        if (memory == NULL)                                                  \
+          oom_statement                                                      \
+        if (result == resultbuf && length > 0)                               \
+          DCHAR_CPY (memory, result, length);                                \
+        result = memory;                                                     \
+      }
+#define ENSURE_ALLOCATION(needed) \
+  ENSURE_ALLOCATION_ELSE((needed), goto out_of_memory; )
+
+    for (cp = format, i = 0, dp = &d.dir[0]; ; cp = dp->dir_end, i++, dp++)
+      {
+        if (cp != dp->dir_start)
+          {
+            size_t n = dp->dir_start - cp;
+            size_t augmented_length = xsum (length, n);
+
+            ENSURE_ALLOCATION (augmented_length);
+            /* This copies a piece of FCHAR_T[] into a DCHAR_T[].  Here we
+               need that the format string contains only ASCII characters
+               if FCHAR_T and DCHAR_T are not the same type.  */
+            if (sizeof (FCHAR_T) == sizeof (DCHAR_T))
+              {
+                DCHAR_CPY (result + length, (const DCHAR_T *) cp, n);
+                length = augmented_length;
+              }
+            else
+              {
+                do
+                  result[length++] = *cp++;
+                while (--n > 0);
+              }
+          }
+        if (i == d.count)
+          break;
+
+        /* Execute a single directive.  */
+        if (dp->conversion == '%')
+          {
+            size_t augmented_length;
+
+            if (!(dp->arg_index == ARG_NONE))
+              abort ();
+            augmented_length = xsum (length, 1);
+            ENSURE_ALLOCATION (augmented_length);
+            result[length] = '%';
+            length = augmented_length;
+          }
+        else
+          {
+            if (!(dp->arg_index != ARG_NONE))
+              abort ();
+
+            if (dp->conversion == 'n')
+              {
+                switch (a.arg[dp->arg_index].type)
+                  {
+                  case TYPE_COUNT_SCHAR_POINTER:
+                    *a.arg[dp->arg_index].a.a_count_schar_pointer = length;
+                    break;
+                  case TYPE_COUNT_SHORT_POINTER:
+                    *a.arg[dp->arg_index].a.a_count_short_pointer = length;
+                    break;
+                  case TYPE_COUNT_INT_POINTER:
+                    *a.arg[dp->arg_index].a.a_count_int_pointer = length;
+                    break;
+                  case TYPE_COUNT_LONGINT_POINTER:
+                    *a.arg[dp->arg_index].a.a_count_longint_pointer = length;
+                    break;
+                  case TYPE_COUNT_LONGLONGINT_POINTER:
+                    *a.arg[dp->arg_index].a.a_count_longlongint_pointer = length;
+                    break;
+                  default:
+                    abort ();
+                  }
+              }
+#if ENABLE_UNISTDIO
+            /* The unistdio extensions.  */
+            else if (dp->conversion == 'U')
+              {
+                arg_type type = a.arg[dp->arg_index].type;
+                int flags = dp->flags;
+                int has_width;
+                size_t width;
+                int has_precision;
+                size_t precision;
+
+                has_width = 0;
+                width = 0;
+                if (dp->width_start != dp->width_end)
+                  {
+                    if (dp->width_arg_index != ARG_NONE)
+                      {
+                        int arg;
+
+                        if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
+                          abort ();
+                        arg = a.arg[dp->width_arg_index].a.a_int;
+                        width = arg;
+                        if (arg < 0)
+                          {
+                            /* "A negative field width is taken as a '-' flag
+                                followed by a positive field width."  */
+                            flags |= FLAG_LEFT;
+                            width = -width;
+                          }
+                      }
+                    else
+                      {
+                        const FCHAR_T *digitp = dp->width_start;
+
+                        do
+                          width = xsum (xtimes (width, 10), *digitp++ - '0');
+                        while (digitp != dp->width_end);
+                      }
+                    has_width = 1;
+                  }
+
+                has_precision = 0;
+                precision = 0;
+                if (dp->precision_start != dp->precision_end)
+                  {
+                    if (dp->precision_arg_index != ARG_NONE)
+                      {
+                        int arg;
+
+                        if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
+                          abort ();
+                        arg = a.arg[dp->precision_arg_index].a.a_int;
+                        /* "A negative precision is taken as if the precision
+                            were omitted."  */
+                        if (arg >= 0)
+                          {
+                            precision = arg;
+                            has_precision = 1;
+                          }
+                      }
+                    else
+                      {
+                        const FCHAR_T *digitp = dp->precision_start + 1;
+
+                        precision = 0;
+                        while (digitp != dp->precision_end)
+                          precision = xsum (xtimes (precision, 10), *digitp++ - '0');
+                        has_precision = 1;
+                      }
+                  }
+
+                switch (type)
+                  {
+                  case TYPE_U8_STRING:
+                    {
+                      const uint8_t *arg = a.arg[dp->arg_index].a.a_u8_string;
+                      const uint8_t *arg_end;
+                      size_t characters;
+
+                      if (has_precision)
+                        {
+                          /* Use only PRECISION characters, from the left.  */
+                          arg_end = arg;
+                          characters = 0;
+                          for (; precision > 0; precision--)
+                            {
+                              int count = u8_strmblen (arg_end);
+                              if (count == 0)
+                                break;
+                              if (count < 0)
+                                {
+                                  if (!(result == resultbuf || result == NULL))
+                                    free (result);
+                                  if (buf_malloced != NULL)
+                                    free (buf_malloced);
+                                  CLEANUP ();
+                                  errno = EILSEQ;
+                                  return NULL;
+                                }
+                              arg_end += count;
+                              characters++;
+                            }
+                        }
+                      else if (has_width)
+                        {
+                          /* Use the entire string, and count the number of
+                             characters.  */
+                          arg_end = arg;
+                          characters = 0;
+                          for (;;)
+                            {
+                              int count = u8_strmblen (arg_end);
+                              if (count == 0)
+                                break;
+                              if (count < 0)
+                                {
+                                  if (!(result == resultbuf || result == NULL))
+                                    free (result);
+                                  if (buf_malloced != NULL)
+                                    free (buf_malloced);
+                                  CLEANUP ();
+                                  errno = EILSEQ;
+                                  return NULL;
+                                }
+                              arg_end += count;
+                              characters++;
+                            }
+                        }
+                      else
+                        {
+                          /* Use the entire string.  */
+                          arg_end = arg + u8_strlen (arg);
+                          /* The number of characters doesn't matter.  */
+                          characters = 0;
+                        }
+
+                      if (characters < width && !(dp->flags & FLAG_LEFT))
+                        {
+                          size_t n = width - characters;
+                          ENSURE_ALLOCATION (xsum (length, n));
+                          DCHAR_SET (result + length, ' ', n);
+                          length += n;
+                        }
+
+# if DCHAR_IS_UINT8_T
+                      {
+                        size_t n = arg_end - arg;
+                        ENSURE_ALLOCATION (xsum (length, n));
+                        DCHAR_CPY (result + length, arg, n);
+                        length += n;
+                      }
+# else
+                      { /* Convert.  */
+                        DCHAR_T *converted = result + length;
+                        size_t converted_len = allocated - length;
+#  if DCHAR_IS_TCHAR
+                        /* Convert from UTF-8 to locale encoding.  */
+                        converted =
+                          u8_conv_to_encoding (locale_charset (),
+                                               iconveh_question_mark,
+                                               arg, arg_end - arg, NULL,
+                                               converted, &converted_len);
+#  else
+                        /* Convert from UTF-8 to UTF-16/UTF-32.  */
+                        converted =
+                          U8_TO_DCHAR (arg, arg_end - arg,
+                                       converted, &converted_len);
+#  endif
+                        if (converted == NULL)
+                          {
+                            if (!(result == resultbuf || result == NULL))
+                              free (result);
+                            if (buf_malloced != NULL)
+                              free (buf_malloced);
+                            CLEANUP ();
+                            return NULL;
+                          }
+                        if (converted != result + length)
+                          {
+                            ENSURE_ALLOCATION_ELSE (xsum (length, converted_len),
+                                                    { free (converted); goto out_of_memory; });
+                            DCHAR_CPY (result + length, converted, converted_len);
+                            free (converted);
+                          }
+                        length += converted_len;
+                      }
+# endif
+
+                      if (characters < width && (dp->flags & FLAG_LEFT))
+                        {
+                          size_t n = width - characters;
+                          ENSURE_ALLOCATION (xsum (length, n));
+                          DCHAR_SET (result + length, ' ', n);
+                          length += n;
+                        }
+                    }
+                    break;
+
+                  case TYPE_U16_STRING:
+                    {
+                      const uint16_t *arg = a.arg[dp->arg_index].a.a_u16_string;
+                      const uint16_t *arg_end;
+                      size_t characters;
+
+                      if (has_precision)
+                        {
+                          /* Use only PRECISION characters, from the left.  */
+                          arg_end = arg;
+                          characters = 0;
+                          for (; precision > 0; precision--)
+                            {
+                              int count = u16_strmblen (arg_end);
+                              if (count == 0)
+                                break;
+                              if (count < 0)
+                                {
+                                  if (!(result == resultbuf || result == NULL))
+                                    free (result);
+                                  if (buf_malloced != NULL)
+                                    free (buf_malloced);
+                                  CLEANUP ();
+                                  errno = EILSEQ;
+                                  return NULL;
+                                }
+                              arg_end += count;
+                              characters++;
+                            }
+                        }
+                      else if (has_width)
+                        {
+                          /* Use the entire string, and count the number of
+                             characters.  */
+                          arg_end = arg;
+                          characters = 0;
+                          for (;;)
+                            {
+                              int count = u16_strmblen (arg_end);
+                              if (count == 0)
+                                break;
+                              if (count < 0)
+                                {
+                                  if (!(result == resultbuf || result == NULL))
+                                    free (result);
+                                  if (buf_malloced != NULL)
+                                    free (buf_malloced);
+                                  CLEANUP ();
+                                  errno = EILSEQ;
+                                  return NULL;
+                                }
+                              arg_end += count;
+                              characters++;
+                            }
+                        }
+                      else
+                        {
+                          /* Use the entire string.  */
+                          arg_end = arg + u16_strlen (arg);
+                          /* The number of characters doesn't matter.  */
+                          characters = 0;
+                        }
+
+                      if (characters < width && !(dp->flags & FLAG_LEFT))
+                        {
+                          size_t n = width - characters;
+                          ENSURE_ALLOCATION (xsum (length, n));
+                          DCHAR_SET (result + length, ' ', n);
+                          length += n;
+                        }
+
+# if DCHAR_IS_UINT16_T
+                      {
+                        size_t n = arg_end - arg;
+                        ENSURE_ALLOCATION (xsum (length, n));
+                        DCHAR_CPY (result + length, arg, n);
+                        length += n;
+                      }
+# else
+                      { /* Convert.  */
+                        DCHAR_T *converted = result + length;
+                        size_t converted_len = allocated - length;
+#  if DCHAR_IS_TCHAR
+                        /* Convert from UTF-16 to locale encoding.  */
+                        converted =
+                          u16_conv_to_encoding (locale_charset (),
+                                                iconveh_question_mark,
+                                                arg, arg_end - arg, NULL,
+                                                converted, &converted_len);
+#  else
+                        /* Convert from UTF-16 to UTF-8/UTF-32.  */
+                        converted =
+                          U16_TO_DCHAR (arg, arg_end - arg,
+                                        converted, &converted_len);
+#  endif
+                        if (converted == NULL)
+                          {
+                            if (!(result == resultbuf || result == NULL))
+                              free (result);
+                            if (buf_malloced != NULL)
+                              free (buf_malloced);
+                            CLEANUP ();
+                            return NULL;
+                          }
+                        if (converted != result + length)
+                          {
+                            ENSURE_ALLOCATION_ELSE (xsum (length, converted_len),
+                                                    { free (converted); goto out_of_memory; });
+                            DCHAR_CPY (result + length, converted, converted_len);
+                            free (converted);
+                          }
+                        length += converted_len;
+                      }
+# endif
+
+                      if (characters < width && (dp->flags & FLAG_LEFT))
+                        {
+                          size_t n = width - characters;
+                          ENSURE_ALLOCATION (xsum (length, n));
+                          DCHAR_SET (result + length, ' ', n);
+                          length += n;
+                        }
+                    }
+                    break;
+
+                  case TYPE_U32_STRING:
+                    {
+                      const uint32_t *arg = a.arg[dp->arg_index].a.a_u32_string;
+                      const uint32_t *arg_end;
+                      size_t characters;
+
+                      if (has_precision)
+                        {
+                          /* Use only PRECISION characters, from the left.  */
+                          arg_end = arg;
+                          characters = 0;
+                          for (; precision > 0; precision--)
+                            {
+                              int count = u32_strmblen (arg_end);
+                              if (count == 0)
+                                break;
+                              if (count < 0)
+                                {
+                                  if (!(result == resultbuf || result == NULL))
+                                    free (result);
+                                  if (buf_malloced != NULL)
+                                    free (buf_malloced);
+                                  CLEANUP ();
+                                  errno = EILSEQ;
+                                  return NULL;
+                                }
+                              arg_end += count;
+                              characters++;
+                            }
+                        }
+                      else if (has_width)
+                        {
+                          /* Use the entire string, and count the number of
+                             characters.  */
+                          arg_end = arg;
+                          characters = 0;
+                          for (;;)
+                            {
+                              int count = u32_strmblen (arg_end);
+                              if (count == 0)
+                                break;
+                              if (count < 0)
+                                {
+                                  if (!(result == resultbuf || result == NULL))
+                                    free (result);
+                                  if (buf_malloced != NULL)
+                                    free (buf_malloced);
+                                  CLEANUP ();
+                                  errno = EILSEQ;
+                                  return NULL;
+                                }
+                              arg_end += count;
+                              characters++;
+                            }
+                        }
+                      else
+                        {
+                          /* Use the entire string.  */
+                          arg_end = arg + u32_strlen (arg);
+                          /* The number of characters doesn't matter.  */
+                          characters = 0;
+                        }
+
+                      if (characters < width && !(dp->flags & FLAG_LEFT))
+                        {
+                          size_t n = width - characters;
+                          ENSURE_ALLOCATION (xsum (length, n));
+                          DCHAR_SET (result + length, ' ', n);
+                          length += n;
+                        }
+
+# if DCHAR_IS_UINT32_T
+                      {
+                        size_t n = arg_end - arg;
+                        ENSURE_ALLOCATION (xsum (length, n));
+                        DCHAR_CPY (result + length, arg, n);
+                        length += n;
+                      }
+# else
+                      { /* Convert.  */
+                        DCHAR_T *converted = result + length;
+                        size_t converted_len = allocated - length;
+#  if DCHAR_IS_TCHAR
+                        /* Convert from UTF-32 to locale encoding.  */
+                        converted =
+                          u32_conv_to_encoding (locale_charset (),
+                                                iconveh_question_mark,
+                                                arg, arg_end - arg, NULL,
+                                                converted, &converted_len);
+#  else
+                        /* Convert from UTF-32 to UTF-8/UTF-16.  */
+                        converted =
+                          U32_TO_DCHAR (arg, arg_end - arg,
+                                        converted, &converted_len);
+#  endif
+                        if (converted == NULL)
+                          {
+                            if (!(result == resultbuf || result == NULL))
+                              free (result);
+                            if (buf_malloced != NULL)
+                              free (buf_malloced);
+                            CLEANUP ();
+                            return NULL;
+                          }
+                        if (converted != result + length)
+                          {
+                            ENSURE_ALLOCATION_ELSE (xsum (length, converted_len),
+                                                    { free (converted); goto out_of_memory; });
+                            DCHAR_CPY (result + length, converted, converted_len);
+                            free (converted);
+                          }
+                        length += converted_len;
+                      }
+# endif
+
+                      if (characters < width && (dp->flags & FLAG_LEFT))
+                        {
+                          size_t n = width - characters;
+                          ENSURE_ALLOCATION (xsum (length, n));
+                          DCHAR_SET (result + length, ' ', n);
+                          length += n;
+                        }
+                    }
+                    break;
+
+                  default:
+                    abort ();
+                  }
+              }
+#endif
+#if (!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || (NEED_PRINTF_DIRECTIVE_LS && !defined IN_LIBINTL) || ENABLE_WCHAR_FALLBACK) && HAVE_WCHAR_T
+            else if (dp->conversion == 's'
+# if WIDE_CHAR_VERSION
+                     && a.arg[dp->arg_index].type != TYPE_WIDE_STRING
+# else
+                     && a.arg[dp->arg_index].type == TYPE_WIDE_STRING
+# endif
+                    )
+              {
+                /* The normal handling of the 's' directive below requires
+                   allocating a temporary buffer.  The determination of its
+                   length (tmp_length), in the case when a precision is
+                   specified, below requires a conversion between a char[]
+                   string and a wchar_t[] wide string.  It could be done, but
+                   we have no guarantee that the implementation of sprintf will
+                   use the exactly same algorithm.  Without this guarantee, it
+                   is possible to have buffer overrun bugs.  In order to avoid
+                   such bugs, we implement the entire processing of the 's'
+                   directive ourselves.  */
+                int flags = dp->flags;
+                int has_width;
+                size_t width;
+                int has_precision;
+                size_t precision;
+
+                has_width = 0;
+                width = 0;
+                if (dp->width_start != dp->width_end)
+                  {
+                    if (dp->width_arg_index != ARG_NONE)
+                      {
+                        int arg;
+
+                        if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
+                          abort ();
+                        arg = a.arg[dp->width_arg_index].a.a_int;
+                        width = arg;
+                        if (arg < 0)
+                          {
+                            /* "A negative field width is taken as a '-' flag
+                                followed by a positive field width."  */
+                            flags |= FLAG_LEFT;
+                            width = -width;
+                          }
+                      }
+                    else
+                      {
+                        const FCHAR_T *digitp = dp->width_start;
+
+                        do
+                          width = xsum (xtimes (width, 10), *digitp++ - '0');
+                        while (digitp != dp->width_end);
+                      }
+                    has_width = 1;
+                  }
+
+                has_precision = 0;
+                precision = 6;
+                if (dp->precision_start != dp->precision_end)
+                  {
+                    if (dp->precision_arg_index != ARG_NONE)
+                      {
+                        int arg;
+
+                        if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
+                          abort ();
+                        arg = a.arg[dp->precision_arg_index].a.a_int;
+                        /* "A negative precision is taken as if the precision
+                            were omitted."  */
+                        if (arg >= 0)
+                          {
+                            precision = arg;
+                            has_precision = 1;
+                          }
+                      }
+                    else
+                      {
+                        const FCHAR_T *digitp = dp->precision_start + 1;
+
+                        precision = 0;
+                        while (digitp != dp->precision_end)
+                          precision = xsum (xtimes (precision, 10), *digitp++ - '0');
+                        has_precision = 1;
+                      }
+                  }
+
+# if WIDE_CHAR_VERSION
+                /* %s in vasnwprintf.  See the specification of fwprintf.  */
+                {
+                  const char *arg = a.arg[dp->arg_index].a.a_string;
+                  const char *arg_end;
+                  size_t characters;
+
+                  if (has_precision)
+                    {
+                      /* Use only as many bytes as needed to produce PRECISION
+                         wide characters, from the left.  */
+#  if HAVE_MBRTOWC
+                      mbstate_t state;
+                      memset (&state, '\0', sizeof (mbstate_t));
+#  endif
+                      arg_end = arg;
+                      characters = 0;
+                      for (; precision > 0; precision--)
+                        {
+                          int count;
+#  if HAVE_MBRTOWC
+                          count = mbrlen (arg_end, MB_CUR_MAX, &state);
+#  else
+                          count = mblen (arg_end, MB_CUR_MAX);
+#  endif
+                          if (count == 0)
+                            /* Found the terminating NUL.  */
+                            break;
+                          if (count < 0)
+                            {
+                              /* Invalid or incomplete multibyte character.  */
+                              if (!(result == resultbuf || result == NULL))
+                                free (result);
+                              if (buf_malloced != NULL)
+                                free (buf_malloced);
+                              CLEANUP ();
+                              errno = EILSEQ;
+                              return NULL;
+                            }
+                          arg_end += count;
+                          characters++;
+                        }
+                    }
+                  else if (has_width)
+                    {
+                      /* Use the entire string, and count the number of wide
+                         characters.  */
+#  if HAVE_MBRTOWC
+                      mbstate_t state;
+                      memset (&state, '\0', sizeof (mbstate_t));
+#  endif
+                      arg_end = arg;
+                      characters = 0;
+                      for (;;)
+                        {
+                          int count;
+#  if HAVE_MBRTOWC
+                          count = mbrlen (arg_end, MB_CUR_MAX, &state);
+#  else
+                          count = mblen (arg_end, MB_CUR_MAX);
+#  endif
+                          if (count == 0)
+                            /* Found the terminating NUL.  */
+                            break;
+                          if (count < 0)
+                            {
+                              /* Invalid or incomplete multibyte character.  */
+                              if (!(result == resultbuf || result == NULL))
+                                free (result);
+                              if (buf_malloced != NULL)
+                                free (buf_malloced);
+                              CLEANUP ();
+                              errno = EILSEQ;
+                              return NULL;
+                            }
+                          arg_end += count;
+                          characters++;
+                        }
+                    }
+                  else
+                    {
+                      /* Use the entire string.  */
+                      arg_end = arg + strlen (arg);
+                      /* The number of characters doesn't matter.  */
+                      characters = 0;
+                    }
+
+                  if (characters < width && !(dp->flags & FLAG_LEFT))
+                    {
+                      size_t n = width - characters;
+                      ENSURE_ALLOCATION (xsum (length, n));
+                      DCHAR_SET (result + length, ' ', n);
+                      length += n;
+                    }
+
+                  if (has_precision || has_width)
+                    {
+                      /* We know the number of wide characters in advance.  */
+                      size_t remaining;
+#  if HAVE_MBRTOWC
+                      mbstate_t state;
+                      memset (&state, '\0', sizeof (mbstate_t));
+#  endif
+                      ENSURE_ALLOCATION (xsum (length, characters));
+                      for (remaining = characters; remaining > 0; remaining--)
+                        {
+                          wchar_t wc;
+                          int count;
+#  if HAVE_MBRTOWC
+                          count = mbrtowc (&wc, arg, arg_end - arg, &state);
+#  else
+                          count = mbtowc (&wc, arg, arg_end - arg);
+#  endif
+                          if (count <= 0)
+                            /* mbrtowc not consistent with mbrlen, or mbtowc
+                               not consistent with mblen.  */
+                            abort ();
+                          result[length++] = wc;
+                          arg += count;
+                        }
+                      if (!(arg == arg_end))
+                        abort ();
+                    }
+                  else
+                    {
+#  if HAVE_MBRTOWC
+                      mbstate_t state;
+                      memset (&state, '\0', sizeof (mbstate_t));
+#  endif
+                      while (arg < arg_end)
+                        {
+                          wchar_t wc;
+                          int count;
+#  if HAVE_MBRTOWC
+                          count = mbrtowc (&wc, arg, arg_end - arg, &state);
+#  else
+                          count = mbtowc (&wc, arg, arg_end - arg);
+#  endif
+                          if (count <= 0)
+                            /* mbrtowc not consistent with mbrlen, or mbtowc
+                               not consistent with mblen.  */
+                            abort ();
+                          ENSURE_ALLOCATION (xsum (length, 1));
+                          result[length++] = wc;
+                          arg += count;
+                        }
+                    }
+
+                  if (characters < width && (dp->flags & FLAG_LEFT))
+                    {
+                      size_t n = width - characters;
+                      ENSURE_ALLOCATION (xsum (length, n));
+                      DCHAR_SET (result + length, ' ', n);
+                      length += n;
+                    }
+                }
+# else
+                /* %ls in vasnprintf.  See the specification of fprintf.  */
+                {
+                  const wchar_t *arg = a.arg[dp->arg_index].a.a_wide_string;
+                  const wchar_t *arg_end;
+                  size_t characters;
+#  if !DCHAR_IS_TCHAR
+                  /* This code assumes that TCHAR_T is 'char'.  */
+                  verify (sizeof (TCHAR_T) == 1);
+                  TCHAR_T *tmpsrc;
+                  DCHAR_T *tmpdst;
+                  size_t tmpdst_len;
+#  endif
+                  size_t w;
+
+                  if (has_precision)
+                    {
+                      /* Use only as many wide characters as needed to produce
+                         at most PRECISION bytes, from the left.  */
+#  if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
+                      mbstate_t state;
+                      memset (&state, '\0', sizeof (mbstate_t));
+#  endif
+                      arg_end = arg;
+                      characters = 0;
+                      while (precision > 0)
+                        {
+                          char cbuf[64]; /* Assume MB_CUR_MAX <= 64.  */
+                          int count;
+
+                          if (*arg_end == 0)
+                            /* Found the terminating null wide character.  */
+                            break;
+                          count = local_wcrtomb (cbuf, *arg_end, &state);
+                          if (count < 0)
+                            {
+                              /* Cannot convert.  */
+                              if (!(result == resultbuf || result == NULL))
+                                free (result);
+                              if (buf_malloced != NULL)
+                                free (buf_malloced);
+                              CLEANUP ();
+                              errno = EILSEQ;
+                              return NULL;
+                            }
+                          if (precision < (unsigned int) count)
+                            break;
+                          arg_end++;
+                          characters += count;
+                          precision -= count;
+                        }
+                    }
+#  if DCHAR_IS_TCHAR
+                  else if (has_width)
+#  else
+                  else
+#  endif
+                    {
+                      /* Use the entire string, and count the number of
+                         bytes.  */
+#  if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
+                      mbstate_t state;
+                      memset (&state, '\0', sizeof (mbstate_t));
+#  endif
+                      arg_end = arg;
+                      characters = 0;
+                      for (;;)
+                        {
+                          char cbuf[64]; /* Assume MB_CUR_MAX <= 64.  */
+                          int count;
+
+                          if (*arg_end == 0)
+                            /* Found the terminating null wide character.  */
+                            break;
+                          count = local_wcrtomb (cbuf, *arg_end, &state);
+                          if (count < 0)
+                            {
+                              /* Cannot convert.  */
+                              if (!(result == resultbuf || result == NULL))
+                                free (result);
+                              if (buf_malloced != NULL)
+                                free (buf_malloced);
+                              CLEANUP ();
+                              errno = EILSEQ;
+                              return NULL;
+                            }
+                          arg_end++;
+                          characters += count;
+                        }
+                    }
+#  if DCHAR_IS_TCHAR
+                  else
+                    {
+                      /* Use the entire string.  */
+                      arg_end = arg + local_wcslen (arg);
+                      /* The number of bytes doesn't matter.  */
+                      characters = 0;
+                    }
+#  endif
+
+#  if !DCHAR_IS_TCHAR
+                  /* Convert the string into a piece of temporary memory.  */
+                  tmpsrc = (TCHAR_T *) malloc (characters * sizeof (TCHAR_T));
+                  if (tmpsrc == NULL)
+                    goto out_of_memory;
+                  {
+                    TCHAR_T *tmpptr = tmpsrc;
+                    size_t remaining;
+#   if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
+                    mbstate_t state;
+                    memset (&state, '\0', sizeof (mbstate_t));
+#   endif
+                    for (remaining = characters; remaining > 0; )
+                      {
+                        char cbuf[64]; /* Assume MB_CUR_MAX <= 64.  */
+                        int count;
+
+                        if (*arg == 0)
+                          abort ();
+                        count = local_wcrtomb (cbuf, *arg, &state);
+                        if (count <= 0)
+                          /* Inconsistency.  */
+                          abort ();
+                        memcpy (tmpptr, cbuf, count);
+                        tmpptr += count;
+                        arg++;
+                        remaining -= count;
+                      }
+                    if (!(arg == arg_end))
+                      abort ();
+                  }
+
+                  /* Convert from TCHAR_T[] to DCHAR_T[].  */
+                  tmpdst =
+                    DCHAR_CONV_FROM_ENCODING (locale_charset (),
+                                              iconveh_question_mark,
+                                              tmpsrc, characters,
+                                              NULL,
+                                              NULL, &tmpdst_len);
+                  if (tmpdst == NULL)
+                    {
+                      free (tmpsrc);
+                      if (!(result == resultbuf || result == NULL))
+                        free (result);
+                      if (buf_malloced != NULL)
+                        free (buf_malloced);
+                      CLEANUP ();
+                      return NULL;
+                    }
+                  free (tmpsrc);
+#  endif
+
+                  if (has_width)
+                    {
+#  if ENABLE_UNISTDIO
+                      /* Outside POSIX, it's preferable to compare the width
+                         against the number of _characters_ of the converted
+                         value.  */
+                      w = DCHAR_MBSNLEN (result + length, characters);
+#  else
+                      /* The width is compared against the number of _bytes_
+                         of the converted value, says POSIX.  */
+                      w = characters;
+#  endif
+                    }
+                  else
+                    /* w doesn't matter.  */
+                    w = 0;
+
+                  if (w < width && !(dp->flags & FLAG_LEFT))
+                    {
+                      size_t n = width - w;
+                      ENSURE_ALLOCATION (xsum (length, n));
+                      DCHAR_SET (result + length, ' ', n);
+                      length += n;
+                    }
+
+#  if DCHAR_IS_TCHAR
+                  if (has_precision || has_width)
+                    {
+                      /* We know the number of bytes in advance.  */
+                      size_t remaining;
+#   if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
+                      mbstate_t state;
+                      memset (&state, '\0', sizeof (mbstate_t));
+#   endif
+                      ENSURE_ALLOCATION (xsum (length, characters));
+                      for (remaining = characters; remaining > 0; )
+                        {
+                          char cbuf[64]; /* Assume MB_CUR_MAX <= 64.  */
+                          int count;
+
+                          if (*arg == 0)
+                            abort ();
+                          count = local_wcrtomb (cbuf, *arg, &state);
+                          if (count <= 0)
+                            /* Inconsistency.  */
+                            abort ();
+                          memcpy (result + length, cbuf, count);
+                          length += count;
+                          arg++;
+                          remaining -= count;
+                        }
+                      if (!(arg == arg_end))
+                        abort ();
+                    }
+                  else
+                    {
+#   if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
+                      mbstate_t state;
+                      memset (&state, '\0', sizeof (mbstate_t));
+#   endif
+                      while (arg < arg_end)
+                        {
+                          char cbuf[64]; /* Assume MB_CUR_MAX <= 64.  */
+                          int count;
+
+                          if (*arg == 0)
+                            abort ();
+                          count = local_wcrtomb (cbuf, *arg, &state);
+                          if (count <= 0)
+                            {
+                              /* Cannot convert.  */
+                              if (!(result == resultbuf || result == NULL))
+                                free (result);
+                              if (buf_malloced != NULL)
+                                free (buf_malloced);
+                              CLEANUP ();
+                              errno = EILSEQ;
+                              return NULL;
+                            }
+                          ENSURE_ALLOCATION (xsum (length, count));
+                          memcpy (result + length, cbuf, count);
+                          length += count;
+                          arg++;
+                        }
+                    }
+#  else
+                  ENSURE_ALLOCATION_ELSE (xsum (length, tmpdst_len),
+                                          { free (tmpdst); goto out_of_memory; });
+                  DCHAR_CPY (result + length, tmpdst, tmpdst_len);
+                  free (tmpdst);
+                  length += tmpdst_len;
+#  endif
+
+                  if (w < width && (dp->flags & FLAG_LEFT))
+                    {
+                      size_t n = width - w;
+                      ENSURE_ALLOCATION (xsum (length, n));
+                      DCHAR_SET (result + length, ' ', n);
+                      length += n;
+                    }
+                }
+# endif
+              }
+#endif
+#if ENABLE_WCHAR_FALLBACK && HAVE_WINT_T && !WIDE_CHAR_VERSION
+            else if (dp->conversion == 'c'
+                     && a.arg[dp->arg_index].type == TYPE_WIDE_CHAR)
+              {
+                /* Implement the 'lc' directive ourselves, in order to provide
+                   the fallback that avoids EILSEQ.  */
+                int flags = dp->flags;
+                int has_width;
+                size_t width;
+
+                has_width = 0;
+                width = 0;
+                if (dp->width_start != dp->width_end)
+                  {
+                    if (dp->width_arg_index != ARG_NONE)
+                      {
+                        int arg;
+
+                        if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
+                          abort ();
+                        arg = a.arg[dp->width_arg_index].a.a_int;
+                        width = arg;
+                        if (arg < 0)
+                          {
+                            /* "A negative field width is taken as a '-' flag
+                                followed by a positive field width."  */
+                            flags |= FLAG_LEFT;
+                            width = -width;
+                          }
+                      }
+                    else
+                      {
+                        const FCHAR_T *digitp = dp->width_start;
+
+                        do
+                          width = xsum (xtimes (width, 10), *digitp++ - '0');
+                        while (digitp != dp->width_end);
+                      }
+                    has_width = 1;
+                  }
+
+                /* %lc in vasnprintf.  See the specification of fprintf.  */
+                {
+                  wchar_t arg = (wchar_t) a.arg[dp->arg_index].a.a_wide_char;
+                  size_t characters;
+# if !DCHAR_IS_TCHAR
+                  /* This code assumes that TCHAR_T is 'char'.  */
+                  verify (sizeof (TCHAR_T) == 1);
+                  TCHAR_T tmpsrc[64]; /* Assume MB_CUR_MAX <= 64.  */
+                  DCHAR_T *tmpdst;
+                  size_t tmpdst_len;
+# endif
+                  size_t w;
+
+# if DCHAR_IS_TCHAR
+                  if (has_width)
+# endif
+                    {
+                      /* Count the number of bytes.  */
+                      characters = 0;
+                      if (arg != 0)
+                        {
+                          char cbuf[64]; /* Assume MB_CUR_MAX <= 64.  */
+                          int count;
+# if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
+                          mbstate_t state;
+                          memset (&state, '\0', sizeof (mbstate_t));
+# endif
+
+                          count = local_wcrtomb (cbuf, arg, &state);
+                          if (count < 0)
+                            /* Inconsistency.  */
+                            abort ();
+                          characters = count;
+                        }
+                    }
+# if DCHAR_IS_TCHAR
+                  else
+                    {
+                      /* The number of bytes doesn't matter.  */
+                      characters = 0;
+                    }
+# endif
+
+# if !DCHAR_IS_TCHAR
+                  /* Convert the string into a piece of temporary memory.  */
+                  if (characters > 0) /* implies arg != 0 */
+                    {
+                      char cbuf[64]; /* Assume MB_CUR_MAX <= 64.  */
+                      int count;
+#  if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
+                      mbstate_t state;
+                      memset (&state, '\0', sizeof (mbstate_t));
+#  endif
+
+                      count = local_wcrtomb (cbuf, arg, &state);
+                      if (count <= 0)
+                        /* Inconsistency.  */
+                        abort ();
+                      memcpy (tmpsrc, cbuf, count);
+                    }
+
+                  /* Convert from TCHAR_T[] to DCHAR_T[].  */
+                  tmpdst =
+                    DCHAR_CONV_FROM_ENCODING (locale_charset (),
+                                              iconveh_question_mark,
+                                              tmpsrc, characters,
+                                              NULL,
+                                              NULL, &tmpdst_len);
+                  if (tmpdst == NULL)
+                    {
+                      if (!(result == resultbuf || result == NULL))
+                        free (result);
+                      if (buf_malloced != NULL)
+                        free (buf_malloced);
+                      CLEANUP ();
+                      return NULL;
+                    }
+# endif
+
+                  if (has_width)
+                    {
+# if ENABLE_UNISTDIO
+                      /* Outside POSIX, it's preferable to compare the width
+                         against the number of _characters_ of the converted
+                         value.  */
+                      w = DCHAR_MBSNLEN (result + length, characters);
+# else
+                      /* The width is compared against the number of _bytes_
+                         of the converted value, says POSIX.  */
+                      w = characters;
+# endif
+                    }
+                  else
+                    /* w doesn't matter.  */
+                    w = 0;
+
+                  if (w < width && !(dp->flags & FLAG_LEFT))
+                    {
+                      size_t n = width - w;
+                      ENSURE_ALLOCATION (xsum (length, n));
+                      DCHAR_SET (result + length, ' ', n);
+                      length += n;
+                    }
+
+# if DCHAR_IS_TCHAR
+                  if (has_width)
+                    {
+                      /* We know the number of bytes in advance.  */
+                      ENSURE_ALLOCATION (xsum (length, characters));
+                      if (characters > 0) /* implies arg != 0 */
+                        {
+                          int count;
+#  if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
+                          mbstate_t state;
+                          memset (&state, '\0', sizeof (mbstate_t));
+#  endif
+
+                          count = local_wcrtomb (result + length, arg, &state);
+                          if (count <= 0)
+                            /* Inconsistency.  */
+                            abort ();
+                          length += count;
+                        }
+                    }
+                  else
+                    {
+                      if (arg != 0)
+                        {
+                          char cbuf[64]; /* Assume MB_CUR_MAX <= 64.  */
+                          int count;
+#  if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
+                          mbstate_t state;
+                          memset (&state, '\0', sizeof (mbstate_t));
+#  endif
+
+                          count = local_wcrtomb (cbuf, arg, &state);
+                          if (count <= 0)
+                            /* Inconsistency.  */
+                            abort ();
+                          ENSURE_ALLOCATION (xsum (length, count));
+                          memcpy (result + length, cbuf, count);
+                          length += count;
+                        }
+                    }
+# else
+                  ENSURE_ALLOCATION_ELSE (xsum (length, tmpdst_len),
+                                          { free (tmpdst); goto out_of_memory; });
+                  DCHAR_CPY (result + length, tmpdst, tmpdst_len);
+                  free (tmpdst);
+                  length += tmpdst_len;
+# endif
+
+                  if (w < width && (dp->flags & FLAG_LEFT))
+                    {
+                      size_t n = width - w;
+                      ENSURE_ALLOCATION (xsum (length, n));
+                      DCHAR_SET (result + length, ' ', n);
+                      length += n;
+                    }
+                }
+              }
+#endif
+#if (NEED_PRINTF_DIRECTIVE_A || NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_DOUBLE) && !defined IN_LIBINTL
+            else if ((dp->conversion == 'a' || dp->conversion == 'A')
+# if !(NEED_PRINTF_DIRECTIVE_A || (NEED_PRINTF_LONG_DOUBLE && NEED_PRINTF_DOUBLE))
+                     && (0
+#  if NEED_PRINTF_DOUBLE
+                         || a.arg[dp->arg_index].type == TYPE_DOUBLE
+#  endif
+#  if NEED_PRINTF_LONG_DOUBLE
+                         || a.arg[dp->arg_index].type == TYPE_LONGDOUBLE
+#  endif
+                        )
+# endif
+                    )
+              {
+                arg_type type = a.arg[dp->arg_index].type;
+                int flags = dp->flags;
+                size_t width;
+                int has_precision;
+                size_t precision;
+                size_t tmp_length;
+                size_t count;
+                DCHAR_T tmpbuf[700];
+                DCHAR_T *tmp;
+                DCHAR_T *pad_ptr;
+                DCHAR_T *p;
+
+                width = 0;
+                if (dp->width_start != dp->width_end)
+                  {
+                    if (dp->width_arg_index != ARG_NONE)
+                      {
+                        int arg;
+
+                        if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
+                          abort ();
+                        arg = a.arg[dp->width_arg_index].a.a_int;
+                        width = arg;
+                        if (arg < 0)
+                          {
+                            /* "A negative field width is taken as a '-' flag
+                                followed by a positive field width."  */
+                            flags |= FLAG_LEFT;
+                            width = -width;
+                          }
+                      }
+                    else
+                      {
+                        const FCHAR_T *digitp = dp->width_start;
+
+                        do
+                          width = xsum (xtimes (width, 10), *digitp++ - '0');
+                        while (digitp != dp->width_end);
+                      }
+                  }
+
+                has_precision = 0;
+                precision = 0;
+                if (dp->precision_start != dp->precision_end)
+                  {
+                    if (dp->precision_arg_index != ARG_NONE)
+                      {
+                        int arg;
+
+                        if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
+                          abort ();
+                        arg = a.arg[dp->precision_arg_index].a.a_int;
+                        /* "A negative precision is taken as if the precision
+                            were omitted."  */
+                        if (arg >= 0)
+                          {
+                            precision = arg;
+                            has_precision = 1;
+                          }
+                      }
+                    else
+                      {
+                        const FCHAR_T *digitp = dp->precision_start + 1;
+
+                        precision = 0;
+                        while (digitp != dp->precision_end)
+                          precision = xsum (xtimes (precision, 10), *digitp++ - '0');
+                        has_precision = 1;
+                      }
+                  }
+
+                /* Allocate a temporary buffer of sufficient size.  */
+                if (type == TYPE_LONGDOUBLE)
+                  tmp_length =
+                    (unsigned int) ((LDBL_DIG + 1)
+                                    * 0.831 /* decimal -> hexadecimal */
+                                   )
+                    + 1; /* turn floor into ceil */
+                else
+                  tmp_length =
+                    (unsigned int) ((DBL_DIG + 1)
+                                    * 0.831 /* decimal -> hexadecimal */
+                                   )
+                    + 1; /* turn floor into ceil */
+                if (tmp_length < precision)
+                  tmp_length = precision;
+                /* Account for sign, decimal point etc. */
+                tmp_length = xsum (tmp_length, 12);
+
+                if (tmp_length < width)
+                  tmp_length = width;
+
+                tmp_length = xsum (tmp_length, 1); /* account for trailing NUL */
+
+                if (tmp_length <= sizeof (tmpbuf) / sizeof (DCHAR_T))
+                  tmp = tmpbuf;
+                else
+                  {
+                    size_t tmp_memsize = xtimes (tmp_length, sizeof (DCHAR_T));
+
+                    if (size_overflow_p (tmp_memsize))
+                      /* Overflow, would lead to out of memory.  */
+                      goto out_of_memory;
+                    tmp = (DCHAR_T *) malloc (tmp_memsize);
+                    if (tmp == NULL)
+                      /* Out of memory.  */
+                      goto out_of_memory;
+                  }
+
+                pad_ptr = NULL;
+                p = tmp;
+                if (type == TYPE_LONGDOUBLE)
+                  {
+# if NEED_PRINTF_DIRECTIVE_A || NEED_PRINTF_LONG_DOUBLE
+                    long double arg = a.arg[dp->arg_index].a.a_longdouble;
+
+                    if (isnanl (arg))
+                      {
+                        if (dp->conversion == 'A')
+                          {
+                            *p++ = 'N'; *p++ = 'A'; *p++ = 'N';
+                          }
+                        else
+                          {
+                            *p++ = 'n'; *p++ = 'a'; *p++ = 'n';
+                          }
+                      }
+                    else
+                      {
+                        int sign = 0;
+                        DECL_LONG_DOUBLE_ROUNDING
+
+                        BEGIN_LONG_DOUBLE_ROUNDING ();
+
+                        if (signbit (arg)) /* arg < 0.0L or negative zero */
+                          {
+                            sign = -1;
+                            arg = -arg;
+                          }
+
+                        if (sign < 0)
+                          *p++ = '-';
+                        else if (flags & FLAG_SHOWSIGN)
+                          *p++ = '+';
+                        else if (flags & FLAG_SPACE)
+                          *p++ = ' ';
+
+                        if (arg > 0.0L && arg + arg == arg)
+                          {
+                            if (dp->conversion == 'A')
+                              {
+                                *p++ = 'I'; *p++ = 'N'; *p++ = 'F';
+                              }
+                            else
+                              {
+                                *p++ = 'i'; *p++ = 'n'; *p++ = 'f';
+                              }
+                          }
+                        else
+                          {
+                            int exponent;
+                            long double mantissa;
+
+                            if (arg > 0.0L)
+                              mantissa = printf_frexpl (arg, &exponent);
+                            else
+                              {
+                                exponent = 0;
+                                mantissa = 0.0L;
+                              }
+
+                            if (has_precision
+                                && precision < (unsigned int) ((LDBL_DIG + 1) * 0.831) + 1)
+                              {
+                                /* Round the mantissa.  */
+                                long double tail = mantissa;
+                                size_t q;
+
+                                for (q = precision; ; q--)
+                                  {
+                                    int digit = (int) tail;
+                                    tail -= digit;
+                                    if (q == 0)
+                                      {
+                                        if (digit & 1 ? tail >= 0.5L : tail > 0.5L)
+                                          tail = 1 - tail;
+                                        else
+                                          tail = - tail;
+                                        break;
+                                      }
+                                    tail *= 16.0L;
+                                  }
+                                if (tail != 0.0L)
+                                  for (q = precision; q > 0; q--)
+                                    tail *= 0.0625L;
+                                mantissa += tail;
+                              }
+
+                            *p++ = '0';
+                            *p++ = dp->conversion - 'A' + 'X';
+                            pad_ptr = p;
+                            {
+                              int digit;
+
+                              digit = (int) mantissa;
+                              mantissa -= digit;
+                              *p++ = '0' + digit;
+                              if ((flags & FLAG_ALT)
+                                  || mantissa > 0.0L || precision > 0)
+                                {
+                                  *p++ = decimal_point_char ();
+                                  /* This loop terminates because we assume
+                                     that FLT_RADIX is a power of 2.  */
+                                  while (mantissa > 0.0L)
+                                    {
+                                      mantissa *= 16.0L;
+                                      digit = (int) mantissa;
+                                      mantissa -= digit;
+                                      *p++ = digit
+                                             + (digit < 10
+                                                ? '0'
+                                                : dp->conversion - 10);
+                                      if (precision > 0)
+                                        precision--;
+                                    }
+                                  while (precision > 0)
+                                    {
+                                      *p++ = '0';
+                                      precision--;
+                                    }
+                                }
+                              }
+                              *p++ = dp->conversion - 'A' + 'P';
+#  if WIDE_CHAR_VERSION
+                              {
+                                static const wchar_t decimal_format[] =
+                                  { '%', '+', 'd', '\0' };
+                                SNPRINTF (p, 6 + 1, decimal_format, exponent);
+                              }
+                              while (*p != '\0')
+                                p++;
+#  else
+                              if (sizeof (DCHAR_T) == 1)
+                                {
+                                  sprintf ((char *) p, "%+d", exponent);
+                                  while (*p != '\0')
+                                    p++;
+                                }
+                              else
+                                {
+                                  char expbuf[6 + 1];
+                                  const char *ep;
+                                  sprintf (expbuf, "%+d", exponent);
+                                  for (ep = expbuf; (*p = *ep) != '\0'; ep++)
+                                    p++;
+                                }
+#  endif
+                          }
+
+                        END_LONG_DOUBLE_ROUNDING ();
+                      }
+# else
+                    abort ();
+# endif
+                  }
+                else
+                  {
+# if NEED_PRINTF_DIRECTIVE_A || NEED_PRINTF_DOUBLE
+                    double arg = a.arg[dp->arg_index].a.a_double;
+
+                    if (isnand (arg))
+                      {
+                        if (dp->conversion == 'A')
+                          {
+                            *p++ = 'N'; *p++ = 'A'; *p++ = 'N';
+                          }
+                        else
+                          {
+                            *p++ = 'n'; *p++ = 'a'; *p++ = 'n';
+                          }
+                      }
+                    else
+                      {
+                        int sign = 0;
+
+                        if (signbit (arg)) /* arg < 0.0 or negative zero */
+                          {
+                            sign = -1;
+                            arg = -arg;
+                          }
+
+                        if (sign < 0)
+                          *p++ = '-';
+                        else if (flags & FLAG_SHOWSIGN)
+                          *p++ = '+';
+                        else if (flags & FLAG_SPACE)
+                          *p++ = ' ';
+
+                        if (arg > 0.0 && arg + arg == arg)
+                          {
+                            if (dp->conversion == 'A')
+                              {
+                                *p++ = 'I'; *p++ = 'N'; *p++ = 'F';
+                              }
+                            else
+                              {
+                                *p++ = 'i'; *p++ = 'n'; *p++ = 'f';
+                              }
+                          }
+                        else
+                          {
+                            int exponent;
+                            double mantissa;
+
+                            if (arg > 0.0)
+                              mantissa = printf_frexp (arg, &exponent);
+                            else
+                              {
+                                exponent = 0;
+                                mantissa = 0.0;
+                              }
+
+                            if (has_precision
+                                && precision < (unsigned int) ((DBL_DIG + 1) * 0.831) + 1)
+                              {
+                                /* Round the mantissa.  */
+                                double tail = mantissa;
+                                size_t q;
+
+                                for (q = precision; ; q--)
+                                  {
+                                    int digit = (int) tail;
+                                    tail -= digit;
+                                    if (q == 0)
+                                      {
+                                        if (digit & 1 ? tail >= 0.5 : tail > 0.5)
+                                          tail = 1 - tail;
+                                        else
+                                          tail = - tail;
+                                        break;
+                                      }
+                                    tail *= 16.0;
+                                  }
+                                if (tail != 0.0)
+                                  for (q = precision; q > 0; q--)
+                                    tail *= 0.0625;
+                                mantissa += tail;
+                              }
+
+                            *p++ = '0';
+                            *p++ = dp->conversion - 'A' + 'X';
+                            pad_ptr = p;
+                            {
+                              int digit;
+
+                              digit = (int) mantissa;
+                              mantissa -= digit;
+                              *p++ = '0' + digit;
+                              if ((flags & FLAG_ALT)
+                                  || mantissa > 0.0 || precision > 0)
+                                {
+                                  *p++ = decimal_point_char ();
+                                  /* This loop terminates because we assume
+                                     that FLT_RADIX is a power of 2.  */
+                                  while (mantissa > 0.0)
+                                    {
+                                      mantissa *= 16.0;
+                                      digit = (int) mantissa;
+                                      mantissa -= digit;
+                                      *p++ = digit
+                                             + (digit < 10
+                                                ? '0'
+                                                : dp->conversion - 10);
+                                      if (precision > 0)
+                                        precision--;
+                                    }
+                                  while (precision > 0)
+                                    {
+                                      *p++ = '0';
+                                      precision--;
+                                    }
+                                }
+                              }
+                              *p++ = dp->conversion - 'A' + 'P';
+#  if WIDE_CHAR_VERSION
+                              {
+                                static const wchar_t decimal_format[] =
+                                  { '%', '+', 'd', '\0' };
+                                SNPRINTF (p, 6 + 1, decimal_format, exponent);
+                              }
+                              while (*p != '\0')
+                                p++;
+#  else
+                              if (sizeof (DCHAR_T) == 1)
+                                {
+                                  sprintf ((char *) p, "%+d", exponent);
+                                  while (*p != '\0')
+                                    p++;
+                                }
+                              else
+                                {
+                                  char expbuf[6 + 1];
+                                  const char *ep;
+                                  sprintf (expbuf, "%+d", exponent);
+                                  for (ep = expbuf; (*p = *ep) != '\0'; ep++)
+                                    p++;
+                                }
+#  endif
+                          }
+                      }
+# else
+                    abort ();
+# endif
+                  }
+
+                /* The generated string now extends from tmp to p, with the
+                   zero padding insertion point being at pad_ptr.  */
+                count = p - tmp;
+
+                if (count < width)
+                  {
+                    size_t pad = width - count;
+                    DCHAR_T *end = p + pad;
+
+                    if (flags & FLAG_LEFT)
+                      {
+                        /* Pad with spaces on the right.  */
+                        for (; pad > 0; pad--)
+                          *p++ = ' ';
+                      }
+                    else if ((flags & FLAG_ZERO) && pad_ptr != NULL)
+                      {
+                        /* Pad with zeroes.  */
+                        DCHAR_T *q = end;
+
+                        while (p > pad_ptr)
+                          *--q = *--p;
+                        for (; pad > 0; pad--)
+                          *p++ = '0';
+                      }
+                    else
+                      {
+                        /* Pad with spaces on the left.  */
+                        DCHAR_T *q = end;
+
+                        while (p > tmp)
+                          *--q = *--p;
+                        for (; pad > 0; pad--)
+                          *p++ = ' ';
+                      }
+
+                    p = end;
+                  }
+
+                count = p - tmp;
+
+                if (count >= tmp_length)
+                  /* tmp_length was incorrectly calculated - fix the
+                     code above!  */
+                  abort ();
+
+                /* Make room for the result.  */
+                if (count >= allocated - length)
+                  {
+                    size_t n = xsum (length, count);
+
+                    ENSURE_ALLOCATION (n);
+                  }
+
+                /* Append the result.  */
+                memcpy (result + length, tmp, count * sizeof (DCHAR_T));
+                if (tmp != tmpbuf)
+                  free (tmp);
+                length += count;
+              }
+#endif
+#if (NEED_PRINTF_INFINITE_DOUBLE || NEED_PRINTF_DOUBLE || NEED_PRINTF_INFINITE_LONG_DOUBLE || NEED_PRINTF_LONG_DOUBLE) && !defined IN_LIBINTL
+            else if ((dp->conversion == 'f' || dp->conversion == 'F'
+                      || dp->conversion == 'e' || dp->conversion == 'E'
+                      || dp->conversion == 'g' || dp->conversion == 'G'
+                      || dp->conversion == 'a' || dp->conversion == 'A')
+                     && (0
+# if NEED_PRINTF_DOUBLE
+                         || a.arg[dp->arg_index].type == TYPE_DOUBLE
+# elif NEED_PRINTF_INFINITE_DOUBLE
+                         || (a.arg[dp->arg_index].type == TYPE_DOUBLE
+                             /* The systems (mingw) which produce wrong output
+                                for Inf, -Inf, and NaN also do so for -0.0.
+                                Therefore we treat this case here as well.  */
+                             && is_infinite_or_zero (a.arg[dp->arg_index].a.a_double))
+# endif
+# if NEED_PRINTF_LONG_DOUBLE
+                         || a.arg[dp->arg_index].type == TYPE_LONGDOUBLE
+# elif NEED_PRINTF_INFINITE_LONG_DOUBLE
+                         || (a.arg[dp->arg_index].type == TYPE_LONGDOUBLE
+                             /* Some systems produce wrong output for Inf,
+                                -Inf, and NaN.  Some systems in this category
+                                (IRIX 5.3) also do so for -0.0.  Therefore we
+                                treat this case here as well.  */
+                             && is_infinite_or_zerol (a.arg[dp->arg_index].a.a_longdouble))
+# endif
+                        ))
+              {
+# if (NEED_PRINTF_DOUBLE || NEED_PRINTF_INFINITE_DOUBLE) && (NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_INFINITE_LONG_DOUBLE)
+                arg_type type = a.arg[dp->arg_index].type;
+# endif
+                int flags = dp->flags;
+                size_t width;
+                size_t count;
+                int has_precision;
+                size_t precision;
+                size_t tmp_length;
+                DCHAR_T tmpbuf[700];
+                DCHAR_T *tmp;
+                DCHAR_T *pad_ptr;
+                DCHAR_T *p;
+
+                width = 0;
+                if (dp->width_start != dp->width_end)
+                  {
+                    if (dp->width_arg_index != ARG_NONE)
+                      {
+                        int arg;
+
+                        if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
+                          abort ();
+                        arg = a.arg[dp->width_arg_index].a.a_int;
+                        width = arg;
+                        if (arg < 0)
+                          {
+                            /* "A negative field width is taken as a '-' flag
+                                followed by a positive field width."  */
+                            flags |= FLAG_LEFT;
+                            width = -width;
+                          }
+                      }
+                    else
+                      {
+                        const FCHAR_T *digitp = dp->width_start;
+
+                        do
+                          width = xsum (xtimes (width, 10), *digitp++ - '0');
+                        while (digitp != dp->width_end);
+                      }
+                  }
+
+                has_precision = 0;
+                precision = 0;
+                if (dp->precision_start != dp->precision_end)
+                  {
+                    if (dp->precision_arg_index != ARG_NONE)
+                      {
+                        int arg;
+
+                        if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
+                          abort ();
+                        arg = a.arg[dp->precision_arg_index].a.a_int;
+                        /* "A negative precision is taken as if the precision
+                            were omitted."  */
+                        if (arg >= 0)
+                          {
+                            precision = arg;
+                            has_precision = 1;
+                          }
+                      }
+                    else
+                      {
+                        const FCHAR_T *digitp = dp->precision_start + 1;
+
+                        precision = 0;
+                        while (digitp != dp->precision_end)
+                          precision = xsum (xtimes (precision, 10), *digitp++ - '0');
+                        has_precision = 1;
+                      }
+                  }
+
+                /* POSIX specifies the default precision to be 6 for %f, %F,
+                   %e, %E, but not for %g, %G.  Implementations appear to use
+                   the same default precision also for %g, %G.  But for %a, %A,
+                   the default precision is 0.  */
+                if (!has_precision)
+                  if (!(dp->conversion == 'a' || dp->conversion == 'A'))
+                    precision = 6;
+
+                /* Allocate a temporary buffer of sufficient size.  */
+# if NEED_PRINTF_DOUBLE && NEED_PRINTF_LONG_DOUBLE
+                tmp_length = (type == TYPE_LONGDOUBLE ? LDBL_DIG + 1 : DBL_DIG + 1);
+# elif NEED_PRINTF_INFINITE_DOUBLE && NEED_PRINTF_LONG_DOUBLE
+                tmp_length = (type == TYPE_LONGDOUBLE ? LDBL_DIG + 1 : 0);
+# elif NEED_PRINTF_LONG_DOUBLE
+                tmp_length = LDBL_DIG + 1;
+# elif NEED_PRINTF_DOUBLE
+                tmp_length = DBL_DIG + 1;
+# else
+                tmp_length = 0;
+# endif
+                if (tmp_length < precision)
+                  tmp_length = precision;
+# if NEED_PRINTF_LONG_DOUBLE
+#  if NEED_PRINTF_DOUBLE || NEED_PRINTF_INFINITE_DOUBLE
+                if (type == TYPE_LONGDOUBLE)
+#  endif
+                  if (dp->conversion == 'f' || dp->conversion == 'F')
+                    {
+                      long double arg = a.arg[dp->arg_index].a.a_longdouble;
+                      if (!(isnanl (arg) || arg + arg == arg))
+                        {
+                          /* arg is finite and nonzero.  */
+                          int exponent = floorlog10l (arg < 0 ? -arg : arg);
+                          if (exponent >= 0 && tmp_length < exponent + precision)
+                            tmp_length = exponent + precision;
+                        }
+                    }
+# endif
+# if NEED_PRINTF_DOUBLE
+#  if NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_INFINITE_LONG_DOUBLE
+                if (type == TYPE_DOUBLE)
+#  endif
+                  if (dp->conversion == 'f' || dp->conversion == 'F')
+                    {
+                      double arg = a.arg[dp->arg_index].a.a_double;
+                      if (!(isnand (arg) || arg + arg == arg))
+                        {
+                          /* arg is finite and nonzero.  */
+                          int exponent = floorlog10 (arg < 0 ? -arg : arg);
+                          if (exponent >= 0 && tmp_length < exponent + precision)
+                            tmp_length = exponent + precision;
+                        }
+                    }
+# endif
+                /* Account for sign, decimal point etc. */
+                tmp_length = xsum (tmp_length, 12);
+
+                if (tmp_length < width)
+                  tmp_length = width;
+
+                tmp_length = xsum (tmp_length, 1); /* account for trailing NUL */
+
+                if (tmp_length <= sizeof (tmpbuf) / sizeof (DCHAR_T))
+                  tmp = tmpbuf;
+                else
+                  {
+                    size_t tmp_memsize = xtimes (tmp_length, sizeof (DCHAR_T));
+
+                    if (size_overflow_p (tmp_memsize))
+                      /* Overflow, would lead to out of memory.  */
+                      goto out_of_memory;
+                    tmp = (DCHAR_T *) malloc (tmp_memsize);
+                    if (tmp == NULL)
+                      /* Out of memory.  */
+                      goto out_of_memory;
+                  }
+
+                pad_ptr = NULL;
+                p = tmp;
+
+# if NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_INFINITE_LONG_DOUBLE
+#  if NEED_PRINTF_DOUBLE || NEED_PRINTF_INFINITE_DOUBLE
+                if (type == TYPE_LONGDOUBLE)
+#  endif
+                  {
+                    long double arg = a.arg[dp->arg_index].a.a_longdouble;
+
+                    if (isnanl (arg))
+                      {
+                        if (dp->conversion >= 'A' && dp->conversion <= 'Z')
+                          {
+                            *p++ = 'N'; *p++ = 'A'; *p++ = 'N';
+                          }
+                        else
+                          {
+                            *p++ = 'n'; *p++ = 'a'; *p++ = 'n';
+                          }
+                      }
+                    else
+                      {
+                        int sign = 0;
+                        DECL_LONG_DOUBLE_ROUNDING
+
+                        BEGIN_LONG_DOUBLE_ROUNDING ();
+
+                        if (signbit (arg)) /* arg < 0.0L or negative zero */
+                          {
+                            sign = -1;
+                            arg = -arg;
+                          }
+
+                        if (sign < 0)
+                          *p++ = '-';
+                        else if (flags & FLAG_SHOWSIGN)
+                          *p++ = '+';
+                        else if (flags & FLAG_SPACE)
+                          *p++ = ' ';
+
+                        if (arg > 0.0L && arg + arg == arg)
+                          {
+                            if (dp->conversion >= 'A' && dp->conversion <= 'Z')
+                              {
+                                *p++ = 'I'; *p++ = 'N'; *p++ = 'F';
+                              }
+                            else
+                              {
+                                *p++ = 'i'; *p++ = 'n'; *p++ = 'f';
+                              }
+                          }
+                        else
+                          {
+#  if NEED_PRINTF_LONG_DOUBLE
+                            pad_ptr = p;
+
+                            if (dp->conversion == 'f' || dp->conversion == 'F')
+                              {
+                                char *digits;
+                                size_t ndigits;
+
+                                digits =
+                                  scale10_round_decimal_long_double (arg, precision);
+                                if (digits == NULL)
+                                  {
+                                    END_LONG_DOUBLE_ROUNDING ();
+                                    goto out_of_memory;
+                                  }
+                                ndigits = strlen (digits);
+
+                                if (ndigits > precision)
+                                  do
+                                    {
+                                      --ndigits;
+                                      *p++ = digits[ndigits];
+                                    }
+                                  while (ndigits > precision);
+                                else
+                                  *p++ = '0';
+                                /* Here ndigits <= precision.  */
+                                if ((flags & FLAG_ALT) || precision > 0)
+                                  {
+                                    *p++ = decimal_point_char ();
+                                    for (; precision > ndigits; precision--)
+                                      *p++ = '0';
+                                    while (ndigits > 0)
+                                      {
+                                        --ndigits;
+                                        *p++ = digits[ndigits];
+                                      }
+                                  }
+
+                                free (digits);
+                              }
+                            else if (dp->conversion == 'e' || dp->conversion == 'E')
+                              {
+                                int exponent;
+
+                                if (arg == 0.0L)
+                                  {
+                                    exponent = 0;
+                                    *p++ = '0';
+                                    if ((flags & FLAG_ALT) || precision > 0)
+                                      {
+                                        *p++ = decimal_point_char ();
+                                        for (; precision > 0; precision--)
+                                          *p++ = '0';
+                                      }
+                                  }
+                                else
+                                  {
+                                    /* arg > 0.0L.  */
+                                    int adjusted;
+                                    char *digits;
+                                    size_t ndigits;
+
+                                    exponent = floorlog10l (arg);
+                                    adjusted = 0;
+                                    for (;;)
+                                      {
+                                        digits =
+                                          scale10_round_decimal_long_double (arg,
+                                                                             (int)precision - exponent);
+                                        if (digits == NULL)
+                                          {
+                                            END_LONG_DOUBLE_ROUNDING ();
+                                            goto out_of_memory;
+                                          }
+                                        ndigits = strlen (digits);
+
+                                        if (ndigits == precision + 1)
+                                          break;
+                                        if (ndigits < precision
+                                            || ndigits > precision + 2)
+                                          /* The exponent was not guessed
+                                             precisely enough.  */
+                                          abort ();
+                                        if (adjusted)
+                                          /* None of two values of exponent is
+                                             the right one.  Prevent an endless
+                                             loop.  */
+                                          abort ();
+                                        free (digits);
+                                        if (ndigits == precision)
+                                          exponent -= 1;
+                                        else
+                                          exponent += 1;
+                                        adjusted = 1;
+                                      }
+                                    /* Here ndigits = precision+1.  */
+                                    if (is_borderline (digits, precision))
+                                      {
+                                        /* Maybe the exponent guess was too high
+                                           and a smaller exponent can be reached
+                                           by turning a 10...0 into 9...9x.  */
+                                        char *digits2 =
+                                          scale10_round_decimal_long_double (arg,
+                                                                             (int)precision - exponent + 1);
+                                        if (digits2 == NULL)
+                                          {
+                                            free (digits);
+                                            END_LONG_DOUBLE_ROUNDING ();
+                                            goto out_of_memory;
+                                          }
+                                        if (strlen (digits2) == precision + 1)
+                                          {
+                                            free (digits);
+                                            digits = digits2;
+                                            exponent -= 1;
+                                          }
+                                        else
+                                          free (digits2);
+                                      }
+                                    /* Here ndigits = precision+1.  */
+
+                                    *p++ = digits[--ndigits];
+                                    if ((flags & FLAG_ALT) || precision > 0)
+                                      {
+                                        *p++ = decimal_point_char ();
+                                        while (ndigits > 0)
+                                          {
+                                            --ndigits;
+                                            *p++ = digits[ndigits];
+                                          }
+                                      }
+
+                                    free (digits);
+                                  }
+
+                                *p++ = dp->conversion; /* 'e' or 'E' */
+#   if WIDE_CHAR_VERSION
+                                {
+                                  static const wchar_t decimal_format[] =
+                                    { '%', '+', '.', '2', 'd', '\0' };
+                                  SNPRINTF (p, 6 + 1, decimal_format, exponent);
+                                }
+                                while (*p != '\0')
+                                  p++;
+#   else
+                                if (sizeof (DCHAR_T) == 1)
+                                  {
+                                    sprintf ((char *) p, "%+.2d", exponent);
+                                    while (*p != '\0')
+                                      p++;
+                                  }
+                                else
+                                  {
+                                    char expbuf[6 + 1];
+                                    const char *ep;
+                                    sprintf (expbuf, "%+.2d", exponent);
+                                    for (ep = expbuf; (*p = *ep) != '\0'; ep++)
+                                      p++;
+                                  }
+#   endif
+                              }
+                            else if (dp->conversion == 'g' || dp->conversion == 'G')
+                              {
+                                if (precision == 0)
+                                  precision = 1;
+                                /* precision >= 1.  */
+
+                                if (arg == 0.0L)
+                                  /* The exponent is 0, >= -4, < precision.
+                                     Use fixed-point notation.  */
+                                  {
+                                    size_t ndigits = precision;
+                                    /* Number of trailing zeroes that have to be
+                                       dropped.  */
+                                    size_t nzeroes =
+                                      (flags & FLAG_ALT ? 0 : precision - 1);
+
+                                    --ndigits;
+                                    *p++ = '0';
+                                    if ((flags & FLAG_ALT) || ndigits > nzeroes)
+                                      {
+                                        *p++ = decimal_point_char ();
+                                        while (ndigits > nzeroes)
+                                          {
+                                            --ndigits;
+                                            *p++ = '0';
+                                          }
+                                      }
+                                  }
+                                else
+                                  {
+                                    /* arg > 0.0L.  */
+                                    int exponent;
+                                    int adjusted;
+                                    char *digits;
+                                    size_t ndigits;
+                                    size_t nzeroes;
+
+                                    exponent = floorlog10l (arg);
+                                    adjusted = 0;
+                                    for (;;)
+                                      {
+                                        digits =
+                                          scale10_round_decimal_long_double (arg,
+                                                                             (int)(precision - 1) - exponent);
+                                        if (digits == NULL)
+                                          {
+                                            END_LONG_DOUBLE_ROUNDING ();
+                                            goto out_of_memory;
+                                          }
+                                        ndigits = strlen (digits);
+
+                                        if (ndigits == precision)
+                                          break;
+                                        if (ndigits < precision - 1
+                                            || ndigits > precision + 1)
+                                          /* The exponent was not guessed
+                                             precisely enough.  */
+                                          abort ();
+                                        if (adjusted)
+                                          /* None of two values of exponent is
+                                             the right one.  Prevent an endless
+                                             loop.  */
+                                          abort ();
+                                        free (digits);
+                                        if (ndigits < precision)
+                                          exponent -= 1;
+                                        else
+                                          exponent += 1;
+                                        adjusted = 1;
+                                      }
+                                    /* Here ndigits = precision.  */
+                                    if (is_borderline (digits, precision - 1))
+                                      {
+                                        /* Maybe the exponent guess was too high
+                                           and a smaller exponent can be reached
+                                           by turning a 10...0 into 9...9x.  */
+                                        char *digits2 =
+                                          scale10_round_decimal_long_double (arg,
+                                                                             (int)(precision - 1) - exponent + 1);
+                                        if (digits2 == NULL)
+                                          {
+                                            free (digits);
+                                            END_LONG_DOUBLE_ROUNDING ();
+                                            goto out_of_memory;
+                                          }
+                                        if (strlen (digits2) == precision)
+                                          {
+                                            free (digits);
+                                            digits = digits2;
+                                            exponent -= 1;
+                                          }
+                                        else
+                                          free (digits2);
+                                      }
+                                    /* Here ndigits = precision.  */
+
+                                    /* Determine the number of trailing zeroes
+                                       that have to be dropped.  */
+                                    nzeroes = 0;
+                                    if ((flags & FLAG_ALT) == 0)
+                                      while (nzeroes < ndigits
+                                             && digits[nzeroes] == '0')
+                                        nzeroes++;
+
+                                    /* The exponent is now determined.  */
+                                    if (exponent >= -4
+                                        && exponent < (long)precision)
+                                      {
+                                        /* Fixed-point notation:
+                                           max(exponent,0)+1 digits, then the
+                                           decimal point, then the remaining
+                                           digits without trailing zeroes.  */
+                                        if (exponent >= 0)
+                                          {
+                                            size_t ecount = exponent + 1;
+                                            /* Note: count <= precision = ndigits.  */
+                                            for (; ecount > 0; ecount--)
+                                              *p++ = digits[--ndigits];
+                                            if ((flags & FLAG_ALT) || ndigits > nzeroes)
+                                              {
+                                                *p++ = decimal_point_char ();
+                                                while (ndigits > nzeroes)
+                                                  {
+                                                    --ndigits;
+                                                    *p++ = digits[ndigits];
+                                                  }
+                                              }
+                                          }
+                                        else
+                                          {
+                                            size_t ecount = -exponent - 1;
+                                            *p++ = '0';
+                                            *p++ = decimal_point_char ();
+                                            for (; ecount > 0; ecount--)
+                                              *p++ = '0';
+                                            while (ndigits > nzeroes)
+                                              {
+                                                --ndigits;
+                                                *p++ = digits[ndigits];
+                                              }
+                                          }
+                                      }
+                                    else
+                                      {
+                                        /* Exponential notation.  */
+                                        *p++ = digits[--ndigits];
+                                        if ((flags & FLAG_ALT) || ndigits > nzeroes)
+                                          {
+                                            *p++ = decimal_point_char ();
+                                            while (ndigits > nzeroes)
+                                              {
+                                                --ndigits;
+                                                *p++ = digits[ndigits];
+                                              }
+                                          }
+                                        *p++ = dp->conversion - 'G' + 'E'; /* 'e' or 'E' */
+#   if WIDE_CHAR_VERSION
+                                        {
+                                          static const wchar_t decimal_format[] =
+                                            { '%', '+', '.', '2', 'd', '\0' };
+                                          SNPRINTF (p, 6 + 1, decimal_format, exponent);
+                                        }
+                                        while (*p != '\0')
+                                          p++;
+#   else
+                                        if (sizeof (DCHAR_T) == 1)
+                                          {
+                                            sprintf ((char *) p, "%+.2d", exponent);
+                                            while (*p != '\0')
+                                              p++;
+                                          }
+                                        else
+                                          {
+                                            char expbuf[6 + 1];
+                                            const char *ep;
+                                            sprintf (expbuf, "%+.2d", exponent);
+                                            for (ep = expbuf; (*p = *ep) != '\0'; ep++)
+                                              p++;
+                                          }
+#   endif
+                                      }
+
+                                    free (digits);
+                                  }
+                              }
+                            else
+                              abort ();
+#  else
+                            /* arg is finite.  */
+                            if (!(arg == 0.0L))
+                              abort ();
+
+                            pad_ptr = p;
+
+                            if (dp->conversion == 'f' || dp->conversion == 'F')
+                              {
+                                *p++ = '0';
+                                if ((flags & FLAG_ALT) || precision > 0)
+                                  {
+                                    *p++ = decimal_point_char ();
+                                    for (; precision > 0; precision--)
+                                      *p++ = '0';
+                                  }
+                              }
+                            else if (dp->conversion == 'e' || dp->conversion == 'E')
+                              {
+                                *p++ = '0';
+                                if ((flags & FLAG_ALT) || precision > 0)
+                                  {
+                                    *p++ = decimal_point_char ();
+                                    for (; precision > 0; precision--)
+                                      *p++ = '0';
+                                  }
+                                *p++ = dp->conversion; /* 'e' or 'E' */
+                                *p++ = '+';
+                                *p++ = '0';
+                                *p++ = '0';
+                              }
+                            else if (dp->conversion == 'g' || dp->conversion == 'G')
+                              {
+                                *p++ = '0';
+                                if (flags & FLAG_ALT)
+                                  {
+                                    size_t ndigits =
+                                      (precision > 0 ? precision - 1 : 0);
+                                    *p++ = decimal_point_char ();
+                                    for (; ndigits > 0; --ndigits)
+                                      *p++ = '0';
+                                  }
+                              }
+                            else if (dp->conversion == 'a' || dp->conversion == 'A')
+                              {
+                                *p++ = '0';
+                                *p++ = dp->conversion - 'A' + 'X';
+                                pad_ptr = p;
+                                *p++ = '0';
+                                if ((flags & FLAG_ALT) || precision > 0)
+                                  {
+                                    *p++ = decimal_point_char ();
+                                    for (; precision > 0; precision--)
+                                      *p++ = '0';
+                                  }
+                                *p++ = dp->conversion - 'A' + 'P';
+                                *p++ = '+';
+                                *p++ = '0';
+                              }
+                            else
+                              abort ();
+#  endif
+                          }
+
+                        END_LONG_DOUBLE_ROUNDING ();
+                      }
+                  }
+#  if NEED_PRINTF_DOUBLE || NEED_PRINTF_INFINITE_DOUBLE
+                else
+#  endif
+# endif
+# if NEED_PRINTF_DOUBLE || NEED_PRINTF_INFINITE_DOUBLE
+                  {
+                    double arg = a.arg[dp->arg_index].a.a_double;
+
+                    if (isnand (arg))
+                      {
+                        if (dp->conversion >= 'A' && dp->conversion <= 'Z')
+                          {
+                            *p++ = 'N'; *p++ = 'A'; *p++ = 'N';
+                          }
+                        else
+                          {
+                            *p++ = 'n'; *p++ = 'a'; *p++ = 'n';
+                          }
+                      }
+                    else
+                      {
+                        int sign = 0;
+
+                        if (signbit (arg)) /* arg < 0.0 or negative zero */
+                          {
+                            sign = -1;
+                            arg = -arg;
+                          }
+
+                        if (sign < 0)
+                          *p++ = '-';
+                        else if (flags & FLAG_SHOWSIGN)
+                          *p++ = '+';
+                        else if (flags & FLAG_SPACE)
+                          *p++ = ' ';
+
+                        if (arg > 0.0 && arg + arg == arg)
+                          {
+                            if (dp->conversion >= 'A' && dp->conversion <= 'Z')
+                              {
+                                *p++ = 'I'; *p++ = 'N'; *p++ = 'F';
+                              }
+                            else
+                              {
+                                *p++ = 'i'; *p++ = 'n'; *p++ = 'f';
+                              }
+                          }
+                        else
+                          {
+#  if NEED_PRINTF_DOUBLE
+                            pad_ptr = p;
+
+                            if (dp->conversion == 'f' || dp->conversion == 'F')
+                              {
+                                char *digits;
+                                size_t ndigits;
+
+                                digits =
+                                  scale10_round_decimal_double (arg, precision);
+                                if (digits == NULL)
+                                  goto out_of_memory;
+                                ndigits = strlen (digits);
+
+                                if (ndigits > precision)
+                                  do
+                                    {
+                                      --ndigits;
+                                      *p++ = digits[ndigits];
+                                    }
+                                  while (ndigits > precision);
+                                else
+                                  *p++ = '0';
+                                /* Here ndigits <= precision.  */
+                                if ((flags & FLAG_ALT) || precision > 0)
+                                  {
+                                    *p++ = decimal_point_char ();
+                                    for (; precision > ndigits; precision--)
+                                      *p++ = '0';
+                                    while (ndigits > 0)
+                                      {
+                                        --ndigits;
+                                        *p++ = digits[ndigits];
+                                      }
+                                  }
+
+                                free (digits);
+                              }
+                            else if (dp->conversion == 'e' || dp->conversion == 'E')
+                              {
+                                int exponent;
+
+                                if (arg == 0.0)
+                                  {
+                                    exponent = 0;
+                                    *p++ = '0';
+                                    if ((flags & FLAG_ALT) || precision > 0)
+                                      {
+                                        *p++ = decimal_point_char ();
+                                        for (; precision > 0; precision--)
+                                          *p++ = '0';
+                                      }
+                                  }
+                                else
+                                  {
+                                    /* arg > 0.0.  */
+                                    int adjusted;
+                                    char *digits;
+                                    size_t ndigits;
+
+                                    exponent = floorlog10 (arg);
+                                    adjusted = 0;
+                                    for (;;)
+                                      {
+                                        digits =
+                                          scale10_round_decimal_double (arg,
+                                                                        (int)precision - exponent);
+                                        if (digits == NULL)
+                                          goto out_of_memory;
+                                        ndigits = strlen (digits);
+
+                                        if (ndigits == precision + 1)
+                                          break;
+                                        if (ndigits < precision
+                                            || ndigits > precision + 2)
+                                          /* The exponent was not guessed
+                                             precisely enough.  */
+                                          abort ();
+                                        if (adjusted)
+                                          /* None of two values of exponent is
+                                             the right one.  Prevent an endless
+                                             loop.  */
+                                          abort ();
+                                        free (digits);
+                                        if (ndigits == precision)
+                                          exponent -= 1;
+                                        else
+                                          exponent += 1;
+                                        adjusted = 1;
+                                      }
+                                    /* Here ndigits = precision+1.  */
+                                    if (is_borderline (digits, precision))
+                                      {
+                                        /* Maybe the exponent guess was too high
+                                           and a smaller exponent can be reached
+                                           by turning a 10...0 into 9...9x.  */
+                                        char *digits2 =
+                                          scale10_round_decimal_double (arg,
+                                                                        (int)precision - exponent + 1);
+                                        if (digits2 == NULL)
+                                          {
+                                            free (digits);
+                                            goto out_of_memory;
+                                          }
+                                        if (strlen (digits2) == precision + 1)
+                                          {
+                                            free (digits);
+                                            digits = digits2;
+                                            exponent -= 1;
+                                          }
+                                        else
+                                          free (digits2);
+                                      }
+                                    /* Here ndigits = precision+1.  */
+
+                                    *p++ = digits[--ndigits];
+                                    if ((flags & FLAG_ALT) || precision > 0)
+                                      {
+                                        *p++ = decimal_point_char ();
+                                        while (ndigits > 0)
+                                          {
+                                            --ndigits;
+                                            *p++ = digits[ndigits];
+                                          }
+                                      }
+
+                                    free (digits);
+                                  }
+
+                                *p++ = dp->conversion; /* 'e' or 'E' */
+#   if WIDE_CHAR_VERSION
+                                {
+                                  static const wchar_t decimal_format[] =
+                                    /* Produce the same number of exponent digits
+                                       as the native printf implementation.  */
+#    if defined _WIN32 && ! defined __CYGWIN__
+                                    { '%', '+', '.', '3', 'd', '\0' };
+#    else
+                                    { '%', '+', '.', '2', 'd', '\0' };
+#    endif
+                                  SNPRINTF (p, 6 + 1, decimal_format, exponent);
+                                }
+                                while (*p != '\0')
+                                  p++;
+#   else
+                                {
+                                  static const char decimal_format[] =
+                                    /* Produce the same number of exponent digits
+                                       as the native printf implementation.  */
+#    if defined _WIN32 && ! defined __CYGWIN__
+                                    "%+.3d";
+#    else
+                                    "%+.2d";
+#    endif
+                                  if (sizeof (DCHAR_T) == 1)
+                                    {
+                                      sprintf ((char *) p, decimal_format, exponent);
+                                      while (*p != '\0')
+                                        p++;
+                                    }
+                                  else
+                                    {
+                                      char expbuf[6 + 1];
+                                      const char *ep;
+                                      sprintf (expbuf, decimal_format, exponent);
+                                      for (ep = expbuf; (*p = *ep) != '\0'; ep++)
+                                        p++;
+                                    }
+                                }
+#   endif
+                              }
+                            else if (dp->conversion == 'g' || dp->conversion == 'G')
+                              {
+                                if (precision == 0)
+                                  precision = 1;
+                                /* precision >= 1.  */
+
+                                if (arg == 0.0)
+                                  /* The exponent is 0, >= -4, < precision.
+                                     Use fixed-point notation.  */
+                                  {
+                                    size_t ndigits = precision;
+                                    /* Number of trailing zeroes that have to be
+                                       dropped.  */
+                                    size_t nzeroes =
+                                      (flags & FLAG_ALT ? 0 : precision - 1);
+
+                                    --ndigits;
+                                    *p++ = '0';
+                                    if ((flags & FLAG_ALT) || ndigits > nzeroes)
+                                      {
+                                        *p++ = decimal_point_char ();
+                                        while (ndigits > nzeroes)
+                                          {
+                                            --ndigits;
+                                            *p++ = '0';
+                                          }
+                                      }
+                                  }
+                                else
+                                  {
+                                    /* arg > 0.0.  */
+                                    int exponent;
+                                    int adjusted;
+                                    char *digits;
+                                    size_t ndigits;
+                                    size_t nzeroes;
+
+                                    exponent = floorlog10 (arg);
+                                    adjusted = 0;
+                                    for (;;)
+                                      {
+                                        digits =
+                                          scale10_round_decimal_double (arg,
+                                                                        (int)(precision - 1) - exponent);
+                                        if (digits == NULL)
+                                          goto out_of_memory;
+                                        ndigits = strlen (digits);
+
+                                        if (ndigits == precision)
+                                          break;
+                                        if (ndigits < precision - 1
+                                            || ndigits > precision + 1)
+                                          /* The exponent was not guessed
+                                             precisely enough.  */
+                                          abort ();
+                                        if (adjusted)
+                                          /* None of two values of exponent is
+                                             the right one.  Prevent an endless
+                                             loop.  */
+                                          abort ();
+                                        free (digits);
+                                        if (ndigits < precision)
+                                          exponent -= 1;
+                                        else
+                                          exponent += 1;
+                                        adjusted = 1;
+                                      }
+                                    /* Here ndigits = precision.  */
+                                    if (is_borderline (digits, precision - 1))
+                                      {
+                                        /* Maybe the exponent guess was too high
+                                           and a smaller exponent can be reached
+                                           by turning a 10...0 into 9...9x.  */
+                                        char *digits2 =
+                                          scale10_round_decimal_double (arg,
+                                                                        (int)(precision - 1) - exponent + 1);
+                                        if (digits2 == NULL)
+                                          {
+                                            free (digits);
+                                            goto out_of_memory;
+                                          }
+                                        if (strlen (digits2) == precision)
+                                          {
+                                            free (digits);
+                                            digits = digits2;
+                                            exponent -= 1;
+                                          }
+                                        else
+                                          free (digits2);
+                                      }
+                                    /* Here ndigits = precision.  */
+
+                                    /* Determine the number of trailing zeroes
+                                       that have to be dropped.  */
+                                    nzeroes = 0;
+                                    if ((flags & FLAG_ALT) == 0)
+                                      while (nzeroes < ndigits
+                                             && digits[nzeroes] == '0')
+                                        nzeroes++;
+
+                                    /* The exponent is now determined.  */
+                                    if (exponent >= -4
+                                        && exponent < (long)precision)
+                                      {
+                                        /* Fixed-point notation:
+                                           max(exponent,0)+1 digits, then the
+                                           decimal point, then the remaining
+                                           digits without trailing zeroes.  */
+                                        if (exponent >= 0)
+                                          {
+                                            size_t ecount = exponent + 1;
+                                            /* Note: ecount <= precision = ndigits.  */
+                                            for (; ecount > 0; ecount--)
+                                              *p++ = digits[--ndigits];
+                                            if ((flags & FLAG_ALT) || ndigits > nzeroes)
+                                              {
+                                                *p++ = decimal_point_char ();
+                                                while (ndigits > nzeroes)
+                                                  {
+                                                    --ndigits;
+                                                    *p++ = digits[ndigits];
+                                                  }
+                                              }
+                                          }
+                                        else
+                                          {
+                                            size_t ecount = -exponent - 1;
+                                            *p++ = '0';
+                                            *p++ = decimal_point_char ();
+                                            for (; ecount > 0; ecount--)
+                                              *p++ = '0';
+                                            while (ndigits > nzeroes)
+                                              {
+                                                --ndigits;
+                                                *p++ = digits[ndigits];
+                                              }
+                                          }
+                                      }
+                                    else
+                                      {
+                                        /* Exponential notation.  */
+                                        *p++ = digits[--ndigits];
+                                        if ((flags & FLAG_ALT) || ndigits > nzeroes)
+                                          {
+                                            *p++ = decimal_point_char ();
+                                            while (ndigits > nzeroes)
+                                              {
+                                                --ndigits;
+                                                *p++ = digits[ndigits];
+                                              }
+                                          }
+                                        *p++ = dp->conversion - 'G' + 'E'; /* 'e' or 'E' */
+#   if WIDE_CHAR_VERSION
+                                        {
+                                          static const wchar_t decimal_format[] =
+                                            /* Produce the same number of exponent digits
+                                               as the native printf implementation.  */
+#    if defined _WIN32 && ! defined __CYGWIN__
+                                            { '%', '+', '.', '3', 'd', '\0' };
+#    else
+                                            { '%', '+', '.', '2', 'd', '\0' };
+#    endif
+                                          SNPRINTF (p, 6 + 1, decimal_format, exponent);
+                                        }
+                                        while (*p != '\0')
+                                          p++;
+#   else
+                                        {
+                                          static const char decimal_format[] =
+                                            /* Produce the same number of exponent digits
+                                               as the native printf implementation.  */
+#    if defined _WIN32 && ! defined __CYGWIN__
+                                            "%+.3d";
+#    else
+                                            "%+.2d";
+#    endif
+                                          if (sizeof (DCHAR_T) == 1)
+                                            {
+                                              sprintf ((char *) p, decimal_format, exponent);
+                                              while (*p != '\0')
+                                                p++;
+                                            }
+                                          else
+                                            {
+                                              char expbuf[6 + 1];
+                                              const char *ep;
+                                              sprintf (expbuf, decimal_format, exponent);
+                                              for (ep = expbuf; (*p = *ep) != '\0'; ep++)
+                                                p++;
+                                            }
+                                        }
+#   endif
+                                      }
+
+                                    free (digits);
+                                  }
+                              }
+                            else
+                              abort ();
+#  else
+                            /* arg is finite.  */
+                            if (!(arg == 0.0))
+                              abort ();
+
+                            pad_ptr = p;
+
+                            if (dp->conversion == 'f' || dp->conversion == 'F')
+                              {
+                                *p++ = '0';
+                                if ((flags & FLAG_ALT) || precision > 0)
+                                  {
+                                    *p++ = decimal_point_char ();
+                                    for (; precision > 0; precision--)
+                                      *p++ = '0';
+                                  }
+                              }
+                            else if (dp->conversion == 'e' || dp->conversion == 'E')
+                              {
+                                *p++ = '0';
+                                if ((flags & FLAG_ALT) || precision > 0)
+                                  {
+                                    *p++ = decimal_point_char ();
+                                    for (; precision > 0; precision--)
+                                      *p++ = '0';
+                                  }
+                                *p++ = dp->conversion; /* 'e' or 'E' */
+                                *p++ = '+';
+                                /* Produce the same number of exponent digits as
+                                   the native printf implementation.  */
+#   if defined _WIN32 && ! defined __CYGWIN__
+                                *p++ = '0';
+#   endif
+                                *p++ = '0';
+                                *p++ = '0';
+                              }
+                            else if (dp->conversion == 'g' || dp->conversion == 'G')
+                              {
+                                *p++ = '0';
+                                if (flags & FLAG_ALT)
+                                  {
+                                    size_t ndigits =
+                                      (precision > 0 ? precision - 1 : 0);
+                                    *p++ = decimal_point_char ();
+                                    for (; ndigits > 0; --ndigits)
+                                      *p++ = '0';
+                                  }
+                              }
+                            else
+                              abort ();
+#  endif
+                          }
+                      }
+                  }
+# endif
+
+                /* The generated string now extends from tmp to p, with the
+                   zero padding insertion point being at pad_ptr.  */
+                count = p - tmp;
+
+                if (count < width)
+                  {
+                    size_t pad = width - count;
+                    DCHAR_T *end = p + pad;
+
+                    if (flags & FLAG_LEFT)
+                      {
+                        /* Pad with spaces on the right.  */
+                        for (; pad > 0; pad--)
+                          *p++ = ' ';
+                      }
+                    else if ((flags & FLAG_ZERO) && pad_ptr != NULL)
+                      {
+                        /* Pad with zeroes.  */
+                        DCHAR_T *q = end;
+
+                        while (p > pad_ptr)
+                          *--q = *--p;
+                        for (; pad > 0; pad--)
+                          *p++ = '0';
+                      }
+                    else
+                      {
+                        /* Pad with spaces on the left.  */
+                        DCHAR_T *q = end;
+
+                        while (p > tmp)
+                          *--q = *--p;
+                        for (; pad > 0; pad--)
+                          *p++ = ' ';
+                      }
+
+                    p = end;
+                  }
+
+                count = p - tmp;
+
+                if (count >= tmp_length)
+                  /* tmp_length was incorrectly calculated - fix the
+                     code above!  */
+                  abort ();
+
+                /* Make room for the result.  */
+                if (count >= allocated - length)
+                  {
+                    size_t n = xsum (length, count);
+
+                    ENSURE_ALLOCATION (n);
+                  }
+
+                /* Append the result.  */
+                memcpy (result + length, tmp, count * sizeof (DCHAR_T));
+                if (tmp != tmpbuf)
+                  free (tmp);
+                length += count;
+              }
+#endif
+            else
+              {
+                arg_type type = a.arg[dp->arg_index].type;
+                int flags = dp->flags;
+#if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
+                int has_width;
+#endif
+#if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
+                size_t width;
+#endif
+#if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || NEED_PRINTF_UNBOUNDED_PRECISION
+                int has_precision;
+                size_t precision;
+#endif
+#if NEED_PRINTF_UNBOUNDED_PRECISION
+                int prec_ourselves;
+#else
+#               define prec_ourselves 0
+#endif
+#if NEED_PRINTF_FLAG_LEFTADJUST
+#               define pad_ourselves 1
+#elif !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
+                int pad_ourselves;
+#else
+#               define pad_ourselves 0
+#endif
+                TCHAR_T *fbp;
+                unsigned int prefix_count;
+                int prefixes[2] IF_LINT (= { 0 });
+                int orig_errno;
+#if !USE_SNPRINTF
+                size_t tmp_length;
+                TCHAR_T tmpbuf[700];
+                TCHAR_T *tmp;
+#endif
+
+#if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
+                has_width = 0;
+#endif
+#if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
+                width = 0;
+                if (dp->width_start != dp->width_end)
+                  {
+                    if (dp->width_arg_index != ARG_NONE)
+                      {
+                        int arg;
+
+                        if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
+                          abort ();
+                        arg = a.arg[dp->width_arg_index].a.a_int;
+                        width = arg;
+                        if (arg < 0)
+                          {
+                            /* "A negative field width is taken as a '-' flag
+                                followed by a positive field width."  */
+                            flags |= FLAG_LEFT;
+                            width = -width;
+                          }
+                      }
+                    else
+                      {
+                        const FCHAR_T *digitp = dp->width_start;
+
+                        do
+                          width = xsum (xtimes (width, 10), *digitp++ - '0');
+                        while (digitp != dp->width_end);
+                      }
+#if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
+                    has_width = 1;
+#endif
+                  }
+#endif
+
+#if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || NEED_PRINTF_UNBOUNDED_PRECISION
+                has_precision = 0;
+                precision = 6;
+                if (dp->precision_start != dp->precision_end)
+                  {
+                    if (dp->precision_arg_index != ARG_NONE)
+                      {
+                        int arg;
+
+                        if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
+                          abort ();
+                        arg = a.arg[dp->precision_arg_index].a.a_int;
+                        /* "A negative precision is taken as if the precision
+                            were omitted."  */
+                        if (arg >= 0)
+                          {
+                            precision = arg;
+                            has_precision = 1;
+                          }
+                      }
+                    else
+                      {
+                        const FCHAR_T *digitp = dp->precision_start + 1;
+
+                        precision = 0;
+                        while (digitp != dp->precision_end)
+                          precision = xsum (xtimes (precision, 10), *digitp++ - '0');
+                        has_precision = 1;
+                      }
+                  }
+#endif
+
+                /* Decide whether to handle the precision ourselves.  */
+#if NEED_PRINTF_UNBOUNDED_PRECISION
+                switch (dp->conversion)
+                  {
+                  case 'd': case 'i': case 'u':
+                  case 'o':
+                  case 'x': case 'X': case 'p':
+                    prec_ourselves = has_precision && (precision > 0);
+                    break;
+                  default:
+                    prec_ourselves = 0;
+                    break;
+                  }
+#endif
+
+                /* Decide whether to perform the padding ourselves.  */
+#if !NEED_PRINTF_FLAG_LEFTADJUST && (!DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION)
+                switch (dp->conversion)
+                  {
+# if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO
+                  /* If we need conversion from TCHAR_T[] to DCHAR_T[], we need
+                     to perform the padding after this conversion.  Functions
+                     with unistdio extensions perform the padding based on
+                     character count rather than element count.  */
+                  case 'c': case 's':
+# endif
+# if NEED_PRINTF_FLAG_ZERO
+                  case 'f': case 'F': case 'e': case 'E': case 'g': case 'G':
+                  case 'a': case 'A':
+# endif
+                    pad_ourselves = 1;
+                    break;
+                  default:
+                    pad_ourselves = prec_ourselves;
+                    break;
+                  }
+#endif
+
+#if !USE_SNPRINTF
+                /* Allocate a temporary buffer of sufficient size for calling
+                   sprintf.  */
+                tmp_length =
+                  MAX_ROOM_NEEDED (&a, dp->arg_index, dp->conversion, type,
+                                   flags, width, has_precision, precision,
+                                   pad_ourselves);
+
+                if (tmp_length <= sizeof (tmpbuf) / sizeof (TCHAR_T))
+                  tmp = tmpbuf;
+                else
+                  {
+                    size_t tmp_memsize = xtimes (tmp_length, sizeof (TCHAR_T));
+
+                    if (size_overflow_p (tmp_memsize))
+                      /* Overflow, would lead to out of memory.  */
+                      goto out_of_memory;
+                    tmp = (TCHAR_T *) malloc (tmp_memsize);
+                    if (tmp == NULL)
+                      /* Out of memory.  */
+                      goto out_of_memory;
+                  }
+#endif
+
+                /* Construct the format string for calling snprintf or
+                   sprintf.  */
+                fbp = buf;
+                *fbp++ = '%';
+#if NEED_PRINTF_FLAG_GROUPING
+                /* The underlying implementation doesn't support the ' flag.
+                   Produce no grouping characters in this case; this is
+                   acceptable because the grouping is locale dependent.  */
+#else
+                if (flags & FLAG_GROUP)
+                  *fbp++ = '\'';
+#endif
+                if (flags & FLAG_LEFT)
+                  *fbp++ = '-';
+                if (flags & FLAG_SHOWSIGN)
+                  *fbp++ = '+';
+                if (flags & FLAG_SPACE)
+                  *fbp++ = ' ';
+                if (flags & FLAG_ALT)
+                  *fbp++ = '#';
+#if __GLIBC__ >= 2 && !defined __UCLIBC__
+                if (flags & FLAG_LOCALIZED)
+                  *fbp++ = 'I';
+#endif
+                if (!pad_ourselves)
+                  {
+                    if (flags & FLAG_ZERO)
+                      *fbp++ = '0';
+                    if (dp->width_start != dp->width_end)
+                      {
+                        size_t n = dp->width_end - dp->width_start;
+                        /* The width specification is known to consist only
+                           of standard ASCII characters.  */
+                        if (sizeof (FCHAR_T) == sizeof (TCHAR_T))
+                          {
+                            memcpy (fbp, dp->width_start, n * sizeof (TCHAR_T));
+                            fbp += n;
+                          }
+                        else
+                          {
+                            const FCHAR_T *mp = dp->width_start;
+                            do
+                              *fbp++ = *mp++;
+                            while (--n > 0);
+                          }
+                      }
+                  }
+                if (!prec_ourselves)
+                  {
+                    if (dp->precision_start != dp->precision_end)
+                      {
+                        size_t n = dp->precision_end - dp->precision_start;
+                        /* The precision specification is known to consist only
+                           of standard ASCII characters.  */
+                        if (sizeof (FCHAR_T) == sizeof (TCHAR_T))
+                          {
+                            memcpy (fbp, dp->precision_start, n * sizeof (TCHAR_T));
+                            fbp += n;
+                          }
+                        else
+                          {
+                            const FCHAR_T *mp = dp->precision_start;
+                            do
+                              *fbp++ = *mp++;
+                            while (--n > 0);
+                          }
+                      }
+                  }
+
+                switch (type)
+                  {
+                  case TYPE_LONGLONGINT:
+                  case TYPE_ULONGLONGINT:
+#if defined _WIN32 && ! defined __CYGWIN__
+                    *fbp++ = 'I';
+                    *fbp++ = '6';
+                    *fbp++ = '4';
+                    break;
+#else
+                    *fbp++ = 'l';
+#endif
+                    FALLTHROUGH;
+                  case TYPE_LONGINT:
+                  case TYPE_ULONGINT:
+#if HAVE_WINT_T
+                  case TYPE_WIDE_CHAR:
+#endif
+#if HAVE_WCHAR_T
+                  case TYPE_WIDE_STRING:
+#endif
+                    *fbp++ = 'l';
+                    break;
+                  case TYPE_LONGDOUBLE:
+                    *fbp++ = 'L';
+                    break;
+                  default:
+                    break;
+                  }
+#if NEED_PRINTF_DIRECTIVE_F
+                if (dp->conversion == 'F')
+                  *fbp = 'f';
+                else
+#endif
+                  *fbp = dp->conversion;
+#if USE_SNPRINTF
+# if ((HAVE_SNPRINTF_RETVAL_C99 && HAVE_SNPRINTF_TRUNCATION_C99)            \
+      || ((__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3))       \
+          && !defined __UCLIBC__)                                           \
+      || (defined __APPLE__ && defined __MACH__)                            \
+      || defined __ANDROID__                                                \
+      || (defined _WIN32 && ! defined __CYGWIN__))
+                /* On systems where we know that snprintf's return value
+                   conforms to ISO C 99 (HAVE_SNPRINTF_RETVAL_C99) and that
+                   snprintf always produces NUL-terminated strings
+                   (HAVE_SNPRINTF_TRUNCATION_C99), it is possible to avoid
+                   using %n.  And it is desirable to do so, because more and
+                   more platforms no longer support %n, for "security reasons".
+                   In particular, the following platforms:
+                     - On glibc2 systems from 2004-10-18 or newer, the use of
+                       %n in format strings in writable memory may crash the
+                       program (if compiled with _FORTIFY_SOURCE=2).
+                     - On Mac OS X 10.13 or newer, the use of %n in format
+                       strings in writable memory by default crashes the
+                       program.
+                     - On Android, starting on 2018-03-07, the use of %n in
+                       format strings produces a fatal error (see
+                       <https://android.googlesource.com/platform/bionic/+/41398d03b7e8e0dfb951660ae713e682e9fc0336>).
+                   On these platforms, HAVE_SNPRINTF_RETVAL_C99 and
+                   HAVE_SNPRINTF_TRUNCATION_C99 are 1. We have listed them
+                   explicitly in the condition above, in case of cross-
+                   compilation (just to be sure).  */
+                /* On native Windows systems (such as mingw), we can avoid using
+                   %n because:
+                     - Although the gl_SNPRINTF_TRUNCATION_C99 test fails,
+                       snprintf does not write more than the specified number
+                       of bytes. (snprintf (buf, 3, "%d %d", 4567, 89) writes
+                       '4', '5', '6' into buf, not '4', '5', '\0'.)
+                     - Although the gl_SNPRINTF_RETVAL_C99 test fails, snprintf
+                       allows us to recognize the case of an insufficient
+                       buffer size: it returns -1 in this case.
+                   On native Windows systems (such as mingw) where the OS is
+                   Windows Vista, the use of %n in format strings by default
+                   crashes the program. See
+                     <https://gcc.gnu.org/ml/gcc/2007-06/msg00122.html> and
+                     <https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/set-printf-count-output>
+                   So we should avoid %n in this situation.  */
+                fbp[1] = '\0';
+# else           /* AIX <= 5.1, HP-UX, IRIX, OSF/1, Solaris <= 9, BeOS */
+                fbp[1] = '%';
+                fbp[2] = 'n';
+                fbp[3] = '\0';
+# endif
+#else
+                fbp[1] = '\0';
+#endif
+
+                /* Construct the arguments for calling snprintf or sprintf.  */
+                prefix_count = 0;
+                if (!pad_ourselves && dp->width_arg_index != ARG_NONE)
+                  {
+                    if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
+                      abort ();
+                    prefixes[prefix_count++] = a.arg[dp->width_arg_index].a.a_int;
+                  }
+                if (!prec_ourselves && dp->precision_arg_index != ARG_NONE)
+                  {
+                    if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
+                      abort ();
+                    prefixes[prefix_count++] = a.arg[dp->precision_arg_index].a.a_int;
+                  }
+
+#if USE_SNPRINTF
+                /* The SNPRINTF result is appended after result[0..length].
+                   The latter is an array of DCHAR_T; SNPRINTF appends an
+                   array of TCHAR_T to it.  This is possible because
+                   sizeof (TCHAR_T) divides sizeof (DCHAR_T) and
+                   alignof (TCHAR_T) <= alignof (DCHAR_T).  */
+# define TCHARS_PER_DCHAR (sizeof (DCHAR_T) / sizeof (TCHAR_T))
+                /* Ensure that maxlen below will be >= 2.  Needed on BeOS,
+                   where an snprintf() with maxlen==1 acts like sprintf().  */
+                ENSURE_ALLOCATION (xsum (length,
+                                         (2 + TCHARS_PER_DCHAR - 1)
+                                         / TCHARS_PER_DCHAR));
+                /* Prepare checking whether snprintf returns the count
+                   via %n.  */
+                *(TCHAR_T *) (result + length) = '\0';
+#endif
+
+                orig_errno = errno;
+
+                for (;;)
+                  {
+                    int count = -1;
+
+#if USE_SNPRINTF
+                    int retcount = 0;
+                    size_t maxlen = allocated - length;
+                    /* SNPRINTF can fail if its second argument is
+                       > INT_MAX.  */
+                    if (maxlen > INT_MAX / TCHARS_PER_DCHAR)
+                      maxlen = INT_MAX / TCHARS_PER_DCHAR;
+                    maxlen = maxlen * TCHARS_PER_DCHAR;
+# define SNPRINTF_BUF(arg) \
+                    switch (prefix_count)                                   \
+                      {                                                     \
+                      case 0:                                               \
+                        retcount = SNPRINTF ((TCHAR_T *) (result + length), \
+                                             maxlen, buf,                   \
+                                             arg, &count);                  \
+                        break;                                              \
+                      case 1:                                               \
+                        retcount = SNPRINTF ((TCHAR_T *) (result + length), \
+                                             maxlen, buf,                   \
+                                             prefixes[0], arg, &count);     \
+                        break;                                              \
+                      case 2:                                               \
+                        retcount = SNPRINTF ((TCHAR_T *) (result + length), \
+                                             maxlen, buf,                   \
+                                             prefixes[0], prefixes[1], arg, \
+                                             &count);                       \
+                        break;                                              \
+                      default:                                              \
+                        abort ();                                           \
+                      }
+#else
+# define SNPRINTF_BUF(arg) \
+                    switch (prefix_count)                                   \
+                      {                                                     \
+                      case 0:                                               \
+                        count = sprintf (tmp, buf, arg);                    \
+                        break;                                              \
+                      case 1:                                               \
+                        count = sprintf (tmp, buf, prefixes[0], arg);       \
+                        break;                                              \
+                      case 2:                                               \
+                        count = sprintf (tmp, buf, prefixes[0], prefixes[1],\
+                                         arg);                              \
+                        break;                                              \
+                      default:                                              \
+                        abort ();                                           \
+                      }
+#endif
+
+                    errno = 0;
+                    switch (type)
+                      {
+                      case TYPE_SCHAR:
+                        {
+                          int arg = a.arg[dp->arg_index].a.a_schar;
+                          SNPRINTF_BUF (arg);
+                        }
+                        break;
+                      case TYPE_UCHAR:
+                        {
+                          unsigned int arg = a.arg[dp->arg_index].a.a_uchar;
+                          SNPRINTF_BUF (arg);
+                        }
+                        break;
+                      case TYPE_SHORT:
+                        {
+                          int arg = a.arg[dp->arg_index].a.a_short;
+                          SNPRINTF_BUF (arg);
+                        }
+                        break;
+                      case TYPE_USHORT:
+                        {
+                          unsigned int arg = a.arg[dp->arg_index].a.a_ushort;
+                          SNPRINTF_BUF (arg);
+                        }
+                        break;
+                      case TYPE_INT:
+                        {
+                          int arg = a.arg[dp->arg_index].a.a_int;
+                          SNPRINTF_BUF (arg);
+                        }
+                        break;
+                      case TYPE_UINT:
+                        {
+                          unsigned int arg = a.arg[dp->arg_index].a.a_uint;
+                          SNPRINTF_BUF (arg);
+                        }
+                        break;
+                      case TYPE_LONGINT:
+                        {
+                          long int arg = a.arg[dp->arg_index].a.a_longint;
+                          SNPRINTF_BUF (arg);
+                        }
+                        break;
+                      case TYPE_ULONGINT:
+                        {
+                          unsigned long int arg = a.arg[dp->arg_index].a.a_ulongint;
+                          SNPRINTF_BUF (arg);
+                        }
+                        break;
+                      case TYPE_LONGLONGINT:
+                        {
+                          long long int arg = a.arg[dp->arg_index].a.a_longlongint;
+                          SNPRINTF_BUF (arg);
+                        }
+                        break;
+                      case TYPE_ULONGLONGINT:
+                        {
+                          unsigned long long int arg = a.arg[dp->arg_index].a.a_ulonglongint;
+                          SNPRINTF_BUF (arg);
+                        }
+                        break;
+                      case TYPE_DOUBLE:
+                        {
+                          double arg = a.arg[dp->arg_index].a.a_double;
+                          SNPRINTF_BUF (arg);
+                        }
+                        break;
+                      case TYPE_LONGDOUBLE:
+                        {
+                          long double arg = a.arg[dp->arg_index].a.a_longdouble;
+                          SNPRINTF_BUF (arg);
+                        }
+                        break;
+                      case TYPE_CHAR:
+                        {
+                          int arg = a.arg[dp->arg_index].a.a_char;
+                          SNPRINTF_BUF (arg);
+                        }
+                        break;
+#if HAVE_WINT_T
+                      case TYPE_WIDE_CHAR:
+                        {
+                          wint_t arg = a.arg[dp->arg_index].a.a_wide_char;
+                          SNPRINTF_BUF (arg);
+                        }
+                        break;
+#endif
+                      case TYPE_STRING:
+                        {
+                          const char *arg = a.arg[dp->arg_index].a.a_string;
+                          SNPRINTF_BUF (arg);
+                        }
+                        break;
+#if HAVE_WCHAR_T
+                      case TYPE_WIDE_STRING:
+                        {
+                          const wchar_t *arg = a.arg[dp->arg_index].a.a_wide_string;
+                          SNPRINTF_BUF (arg);
+                        }
+                        break;
+#endif
+                      case TYPE_POINTER:
+                        {
+                          void *arg = a.arg[dp->arg_index].a.a_pointer;
+                          SNPRINTF_BUF (arg);
+                        }
+                        break;
+                      default:
+                        abort ();
+                      }
+
+#if USE_SNPRINTF
+                    /* Portability: Not all implementations of snprintf()
+                       are ISO C 99 compliant.  Determine the number of
+                       bytes that snprintf() has produced or would have
+                       produced.  */
+                    if (count >= 0)
+                      {
+                        /* Verify that snprintf() has NUL-terminated its
+                           result.  */
+                        if ((unsigned int) count < maxlen
+                            && ((TCHAR_T *) (result + length)) [count] != '\0')
+                          abort ();
+                        /* Portability hack.  */
+                        if (retcount > count)
+                          count = retcount;
+                      }
+                    else
+                      {
+                        /* snprintf() doesn't understand the '%n'
+                           directive.  */
+                        if (fbp[1] != '\0')
+                          {
+                            /* Don't use the '%n' directive; instead, look
+                               at the snprintf() return value.  */
+                            fbp[1] = '\0';
+                            continue;
+                          }
+                        else
+                          {
+                            /* Look at the snprintf() return value.  */
+                            if (retcount < 0)
+                              {
+# if !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF
+                                /* HP-UX 10.20 snprintf() is doubly deficient:
+                                   It doesn't understand the '%n' directive,
+                                   *and* it returns -1 (rather than the length
+                                   that would have been required) when the
+                                   buffer is too small.
+                                   But a failure at this point can also come
+                                   from other reasons than a too small buffer,
+                                   such as an invalid wide string argument to
+                                   the %ls directive, or possibly an invalid
+                                   floating-point argument.  */
+                                size_t tmp_length =
+                                  MAX_ROOM_NEEDED (&a, dp->arg_index,
+                                                   dp->conversion, type, flags,
+                                                   width,
+                                                   has_precision,
+                                                   precision, pad_ourselves);
+
+                                if (maxlen < tmp_length)
+                                  {
+                                    /* Make more room.  But try to do through
+                                       this reallocation only once.  */
+                                    size_t bigger_need =
+                                      xsum (length,
+                                            xsum (tmp_length,
+                                                  TCHARS_PER_DCHAR - 1)
+                                            / TCHARS_PER_DCHAR);
+                                    /* And always grow proportionally.
+                                       (There may be several arguments, each
+                                       needing a little more room than the
+                                       previous one.)  */
+                                    size_t bigger_need2 =
+                                      xsum (xtimes (allocated, 2), 12);
+                                    if (bigger_need < bigger_need2)
+                                      bigger_need = bigger_need2;
+                                    ENSURE_ALLOCATION (bigger_need);
+                                    continue;
+                                  }
+# endif
+                              }
+                            else
+                              count = retcount;
+                          }
+                      }
+#endif
+
+                    /* Attempt to handle failure.  */
+                    if (count < 0)
+                      {
+                        /* SNPRINTF or sprintf failed.  Use the errno that it
+                           has set, if any.  */
+                        if (errno == 0)
+                          {
+                            if (dp->conversion == 'c' || dp->conversion == 's')
+                              errno = EILSEQ;
+                            else
+                              errno = EINVAL;
+                          }
+
+                        if (!(result == resultbuf || result == NULL))
+                          free (result);
+                        if (buf_malloced != NULL)
+                          free (buf_malloced);
+                        CLEANUP ();
+
+                        return NULL;
+                      }
+
+#if USE_SNPRINTF
+                    /* Handle overflow of the allocated buffer.
+                       If such an overflow occurs, a C99 compliant snprintf()
+                       returns a count >= maxlen.  However, a non-compliant
+                       snprintf() function returns only count = maxlen - 1.  To
+                       cover both cases, test whether count >= maxlen - 1.  */
+                    if ((unsigned int) count + 1 >= maxlen)
+                      {
+                        /* If maxlen already has attained its allowed maximum,
+                           allocating more memory will not increase maxlen.
+                           Instead of looping, bail out.  */
+                        if (maxlen == INT_MAX / TCHARS_PER_DCHAR)
+                          goto overflow;
+                        else
+                          {
+                            /* Need at least (count + 1) * sizeof (TCHAR_T)
+                               bytes.  (The +1 is for the trailing NUL.)
+                               But ask for (count + 2) * sizeof (TCHAR_T)
+                               bytes, so that in the next round, we likely get
+                                 maxlen > (unsigned int) count + 1
+                               and so we don't get here again.
+                               And allocate proportionally, to avoid looping
+                               eternally if snprintf() reports a too small
+                               count.  */
+                            size_t n =
+                              xmax (xsum (length,
+                                          ((unsigned int) count + 2
+                                           + TCHARS_PER_DCHAR - 1)
+                                          / TCHARS_PER_DCHAR),
+                                    xtimes (allocated, 2));
+
+                            ENSURE_ALLOCATION (n);
+                            continue;
+                          }
+                      }
+#endif
+
+#if NEED_PRINTF_UNBOUNDED_PRECISION
+                    if (prec_ourselves)
+                      {
+                        /* Handle the precision.  */
+                        TCHAR_T *prec_ptr =
+# if USE_SNPRINTF
+                          (TCHAR_T *) (result + length);
+# else
+                          tmp;
+# endif
+                        size_t prefix_count;
+                        size_t move;
+
+                        prefix_count = 0;
+                        /* Put the additional zeroes after the sign.  */
+                        if (count >= 1
+                            && (*prec_ptr == '-' || *prec_ptr == '+'
+                                || *prec_ptr == ' '))
+                          prefix_count = 1;
+                        /* Put the additional zeroes after the 0x prefix if
+                           (flags & FLAG_ALT) || (dp->conversion == 'p').  */
+                        else if (count >= 2
+                                 && prec_ptr[0] == '0'
+                                 && (prec_ptr[1] == 'x' || prec_ptr[1] == 'X'))
+                          prefix_count = 2;
+
+                        move = count - prefix_count;
+                        if (precision > move)
+                          {
+                            /* Insert zeroes.  */
+                            size_t insert = precision - move;
+                            TCHAR_T *prec_end;
+
+# if USE_SNPRINTF
+                            size_t n =
+                              xsum (length,
+                                    (count + insert + TCHARS_PER_DCHAR - 1)
+                                    / TCHARS_PER_DCHAR);
+                            length += (count + TCHARS_PER_DCHAR - 1) / TCHARS_PER_DCHAR;
+                            ENSURE_ALLOCATION (n);
+                            length -= (count + TCHARS_PER_DCHAR - 1) / TCHARS_PER_DCHAR;
+                            prec_ptr = (TCHAR_T *) (result + length);
+# endif
+
+                            prec_end = prec_ptr + count;
+                            prec_ptr += prefix_count;
+
+                            while (prec_end > prec_ptr)
+                              {
+                                prec_end--;
+                                prec_end[insert] = prec_end[0];
+                              }
+
+                            prec_end += insert;
+                            do
+                              *--prec_end = '0';
+                            while (prec_end > prec_ptr);
+
+                            count += insert;
+                          }
+                      }
+#endif
+
+#if !USE_SNPRINTF
+                    if (count >= tmp_length)
+                      /* tmp_length was incorrectly calculated - fix the
+                         code above!  */
+                      abort ();
+#endif
+
+#if !DCHAR_IS_TCHAR
+                    /* Convert from TCHAR_T[] to DCHAR_T[].  */
+                    if (dp->conversion == 'c' || dp->conversion == 's')
+                      {
+                        /* type = TYPE_CHAR or TYPE_WIDE_CHAR or TYPE_STRING
+                           TYPE_WIDE_STRING.
+                           The result string is not certainly ASCII.  */
+                        const TCHAR_T *tmpsrc;
+                        DCHAR_T *tmpdst;
+                        size_t tmpdst_len;
+                        /* This code assumes that TCHAR_T is 'char'.  */
+                        verify (sizeof (TCHAR_T) == 1);
+# if USE_SNPRINTF
+                        tmpsrc = (TCHAR_T *) (result + length);
+# else
+                        tmpsrc = tmp;
+# endif
+                        tmpdst =
+                          DCHAR_CONV_FROM_ENCODING (locale_charset (),
+                                                    iconveh_question_mark,
+                                                    tmpsrc, count,
+                                                    NULL,
+                                                    NULL, &tmpdst_len);
+                        if (tmpdst == NULL)
+                          {
+                            if (!(result == resultbuf || result == NULL))
+                              free (result);
+                            if (buf_malloced != NULL)
+                              free (buf_malloced);
+                            CLEANUP ();
+                            return NULL;
+                          }
+                        ENSURE_ALLOCATION_ELSE (xsum (length, tmpdst_len),
+                                                { free (tmpdst); goto out_of_memory; });
+                        DCHAR_CPY (result + length, tmpdst, tmpdst_len);
+                        free (tmpdst);
+                        count = tmpdst_len;
+                      }
+                    else
+                      {
+                        /* The result string is ASCII.
+                           Simple 1:1 conversion.  */
+# if USE_SNPRINTF
+                        /* If sizeof (DCHAR_T) == sizeof (TCHAR_T), it's a
+                           no-op conversion, in-place on the array starting
+                           at (result + length).  */
+                        if (sizeof (DCHAR_T) != sizeof (TCHAR_T))
+# endif
+                          {
+                            const TCHAR_T *tmpsrc;
+                            DCHAR_T *tmpdst;
+                            size_t n;
+
+# if USE_SNPRINTF
+                            if (result == resultbuf)
+                              {
+                                tmpsrc = (TCHAR_T *) (result + length);
+                                /* ENSURE_ALLOCATION will not move tmpsrc
+                                   (because it's part of resultbuf).  */
+                                ENSURE_ALLOCATION (xsum (length, count));
+                              }
+                            else
+                              {
+                                /* ENSURE_ALLOCATION will move the array
+                                   (because it uses realloc().  */
+                                ENSURE_ALLOCATION (xsum (length, count));
+                                tmpsrc = (TCHAR_T *) (result + length);
+                              }
+# else
+                            tmpsrc = tmp;
+                            ENSURE_ALLOCATION (xsum (length, count));
+# endif
+                            tmpdst = result + length;
+                            /* Copy backwards, because of overlapping.  */
+                            tmpsrc += count;
+                            tmpdst += count;
+                            for (n = count; n > 0; n--)
+                              *--tmpdst = *--tmpsrc;
+                          }
+                      }
+#endif
+
+#if DCHAR_IS_TCHAR && !USE_SNPRINTF
+                    /* Make room for the result.  */
+                    if (count > allocated - length)
+                      {
+                        /* Need at least count elements.  But allocate
+                           proportionally.  */
+                        size_t n =
+                          xmax (xsum (length, count), xtimes (allocated, 2));
+
+                        ENSURE_ALLOCATION (n);
+                      }
+#endif
+
+                    /* Here count <= allocated - length.  */
+
+                    /* Perform padding.  */
+#if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
+                    if (pad_ourselves && has_width)
+                      {
+                        size_t w;
+# if ENABLE_UNISTDIO
+                        /* Outside POSIX, it's preferable to compare the width
+                           against the number of _characters_ of the converted
+                           value.  */
+                        w = DCHAR_MBSNLEN (result + length, count);
+# else
+                        /* The width is compared against the number of _bytes_
+                           of the converted value, says POSIX.  */
+                        w = count;
+# endif
+                        if (w < width)
+                          {
+                            size_t pad = width - w;
+
+                            /* Make room for the result.  */
+                            if (xsum (count, pad) > allocated - length)
+                              {
+                                /* Need at least count + pad elements.  But
+                                   allocate proportionally.  */
+                                size_t n =
+                                  xmax (xsum3 (length, count, pad),
+                                        xtimes (allocated, 2));
+
+# if USE_SNPRINTF
+                                length += count;
+                                ENSURE_ALLOCATION (n);
+                                length -= count;
+# else
+                                ENSURE_ALLOCATION (n);
+# endif
+                              }
+                            /* Here count + pad <= allocated - length.  */
+
+                            {
+# if !DCHAR_IS_TCHAR || USE_SNPRINTF
+                              DCHAR_T * const rp = result + length;
+# else
+                              DCHAR_T * const rp = tmp;
+# endif
+                              DCHAR_T *p = rp + count;
+                              DCHAR_T *end = p + pad;
+                              DCHAR_T *pad_ptr;
+# if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO
+                              if (dp->conversion == 'c'
+                                  || dp->conversion == 's')
+                                /* No zero-padding for string directives.  */
+                                pad_ptr = NULL;
+                              else
+# endif
+                                {
+                                  pad_ptr = (*rp == '-' ? rp + 1 : rp);
+                                  /* No zero-padding of "inf" and "nan".  */
+                                  if ((*pad_ptr >= 'A' && *pad_ptr <= 'Z')
+                                      || (*pad_ptr >= 'a' && *pad_ptr <= 'z'))
+                                    pad_ptr = NULL;
+                                }
+                              /* The generated string now extends from rp to p,
+                                 with the zero padding insertion point being at
+                                 pad_ptr.  */
+
+                              count = count + pad; /* = end - rp */
+
+                              if (flags & FLAG_LEFT)
+                                {
+                                  /* Pad with spaces on the right.  */
+                                  for (; pad > 0; pad--)
+                                    *p++ = ' ';
+                                }
+                              else if ((flags & FLAG_ZERO) && pad_ptr != NULL)
+                                {
+                                  /* Pad with zeroes.  */
+                                  DCHAR_T *q = end;
+
+                                  while (p > pad_ptr)
+                                    *--q = *--p;
+                                  for (; pad > 0; pad--)
+                                    *p++ = '0';
+                                }
+                              else
+                                {
+                                  /* Pad with spaces on the left.  */
+                                  DCHAR_T *q = end;
+
+                                  while (p > rp)
+                                    *--q = *--p;
+                                  for (; pad > 0; pad--)
+                                    *p++ = ' ';
+                                }
+                            }
+                          }
+                      }
+#endif
+
+                    /* Here still count <= allocated - length.  */
+
+#if !DCHAR_IS_TCHAR || USE_SNPRINTF
+                    /* The snprintf() result did fit.  */
+#else
+                    /* Append the sprintf() result.  */
+                    memcpy (result + length, tmp, count * sizeof (DCHAR_T));
+#endif
+#if !USE_SNPRINTF
+                    if (tmp != tmpbuf)
+                      free (tmp);
+#endif
+
+#if NEED_PRINTF_DIRECTIVE_F
+                    if (dp->conversion == 'F')
+                      {
+                        /* Convert the %f result to upper case for %F.  */
+                        DCHAR_T *rp = result + length;
+                        size_t rc;
+                        for (rc = count; rc > 0; rc--, rp++)
+                          if (*rp >= 'a' && *rp <= 'z')
+                            *rp = *rp - 'a' + 'A';
+                      }
+#endif
+
+                    length += count;
+                    break;
+                  }
+                errno = orig_errno;
+#undef pad_ourselves
+#undef prec_ourselves
+              }
+          }
+      }
+
+    /* Add the final NUL.  */
+    ENSURE_ALLOCATION (xsum (length, 1));
+    result[length] = '\0';
+
+    if (result != resultbuf && length + 1 < allocated)
+      {
+        /* Shrink the allocated memory if possible.  */
+        DCHAR_T *memory;
+
+        memory = (DCHAR_T *) realloc (result, (length + 1) * sizeof (DCHAR_T));
+        if (memory != NULL)
+          result = memory;
+      }
+
+    if (buf_malloced != NULL)
+      free (buf_malloced);
+    CLEANUP ();
+    *lengthp = length;
+    /* Note that we can produce a big string of a length > INT_MAX.  POSIX
+       says that snprintf() fails with errno = EOVERFLOW in this case, but
+       that's only because snprintf() returns an 'int'.  This function does
+       not have this limitation.  */
+    return result;
+
+#if USE_SNPRINTF
+  overflow:
+    if (!(result == resultbuf || result == NULL))
+      free (result);
+    if (buf_malloced != NULL)
+      free (buf_malloced);
+    CLEANUP ();
+    errno = EOVERFLOW;
+    return NULL;
+#endif
+
+  out_of_memory:
+    if (!(result == resultbuf || result == NULL))
+      free (result);
+    if (buf_malloced != NULL)
+      free (buf_malloced);
+  out_of_memory_1:
+    CLEANUP ();
+    errno = ENOMEM;
+    return NULL;
+  }
+}
+
+#undef MAX_ROOM_NEEDED
+#undef TCHARS_PER_DCHAR
+#undef SNPRINTF
+#undef USE_SNPRINTF
+#undef DCHAR_SET
+#undef DCHAR_CPY
+#undef PRINTF_PARSE
+#undef DIRECTIVES
+#undef DIRECTIVE
+#undef DCHAR_IS_TCHAR
+#undef TCHAR_T
+#undef DCHAR_T
+#undef FCHAR_T
+#undef VASNPRINTF
diff --git a/src/grep/gnulib-tests/vasnprintf.h b/src/grep/gnulib-tests/vasnprintf.h
new file mode 100644
index 0000000..9b02cdf
--- /dev/null
+++ b/src/grep/gnulib-tests/vasnprintf.h
@@ -0,0 +1,72 @@
+/* vsprintf with automatic memory allocation.
+   Copyright (C) 2002-2004, 2007-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _VASNPRINTF_H
+#define _VASNPRINTF_H
+
+/* Get va_list.  */
+#include <stdarg.h>
+
+/* Get size_t.  */
+#include <stddef.h>
+
+/* Get _GL_ATTRIBUTE_SPEC_PRINTF_STANDARD.  */
+#include <stdio.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Write formatted output to a string dynamically allocated with malloc().
+   You can pass a preallocated buffer for the result in RESULTBUF and its
+   size in *LENGTHP; otherwise you pass RESULTBUF = NULL.
+   If successful, return the address of the string (this may be = RESULTBUF
+   if no dynamic memory allocation was necessary) and set *LENGTHP to the
+   number of resulting bytes, excluding the trailing NUL.  Upon error, set
+   errno and return NULL.
+
+   When dynamic memory allocation occurs, the preallocated buffer is left
+   alone (with possibly modified contents).  This makes it possible to use
+   a statically allocated or stack-allocated buffer, like this:
+
+          char buf[100];
+          size_t len = sizeof (buf);
+          char *output = vasnprintf (buf, &len, format, args);
+          if (output == NULL)
+            ... error handling ...;
+          else
+            {
+              ... use the output string ...;
+              if (output != buf)
+                free (output);
+            }
+  */
+#if REPLACE_VASNPRINTF
+# define asnprintf rpl_asnprintf
+# define vasnprintf rpl_vasnprintf
+#endif
+extern char * asnprintf (char *restrict resultbuf, size_t *lengthp,
+                         const char *format, ...)
+       _GL_ATTRIBUTE_FORMAT ((_GL_ATTRIBUTE_SPEC_PRINTF_STANDARD, 3, 4));
+extern char * vasnprintf (char *restrict resultbuf, size_t *lengthp,
+                          const char *format, va_list args)
+       _GL_ATTRIBUTE_FORMAT ((_GL_ATTRIBUTE_SPEC_PRINTF_STANDARD, 3, 0));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _VASNPRINTF_H */
diff --git a/src/grep/gnulib-tests/w32sock.h b/src/grep/gnulib-tests/w32sock.h
new file mode 100644
index 0000000..635a1b2
--- /dev/null
+++ b/src/grep/gnulib-tests/w32sock.h
@@ -0,0 +1,140 @@
+/* w32sock.h --- internal auxiliary functions for Windows socket functions
+
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paolo Bonzini */
+
+#include <errno.h>
+
+/* Get O_RDWR and O_BINARY.  */
+#include <fcntl.h>
+
+/* Get _open_osfhandle().  */
+#include <io.h>
+
+/* Get _get_osfhandle().  */
+#if GNULIB_MSVC_NOTHROW
+# include "msvc-nothrow.h"
+#else
+# include <io.h>
+#endif
+
+#define FD_TO_SOCKET(fd)   ((SOCKET) _get_osfhandle ((fd)))
+#define SOCKET_TO_FD(fh)   (_open_osfhandle ((intptr_t) (fh), O_RDWR | O_BINARY))
+
+static inline void
+set_winsock_errno (void)
+{
+  int err = WSAGetLastError ();
+
+  /* Map some WSAE* errors to the runtime library's error codes.  */
+  switch (err)
+    {
+    case WSA_INVALID_HANDLE:
+      errno = EBADF;
+      break;
+    case WSA_NOT_ENOUGH_MEMORY:
+      errno = ENOMEM;
+      break;
+    case WSA_INVALID_PARAMETER:
+      errno = EINVAL;
+      break;
+    case WSAENAMETOOLONG:
+      errno = ENAMETOOLONG;
+      break;
+    case WSAENOTEMPTY:
+      errno = ENOTEMPTY;
+      break;
+    case WSAEWOULDBLOCK:
+      errno = EWOULDBLOCK;
+      break;
+    case WSAEINPROGRESS:
+      errno = EINPROGRESS;
+      break;
+    case WSAEALREADY:
+      errno = EALREADY;
+      break;
+    case WSAENOTSOCK:
+      errno = ENOTSOCK;
+      break;
+    case WSAEDESTADDRREQ:
+      errno = EDESTADDRREQ;
+      break;
+    case WSAEMSGSIZE:
+      errno = EMSGSIZE;
+      break;
+    case WSAEPROTOTYPE:
+      errno = EPROTOTYPE;
+      break;
+    case WSAENOPROTOOPT:
+      errno = ENOPROTOOPT;
+      break;
+    case WSAEPROTONOSUPPORT:
+      errno = EPROTONOSUPPORT;
+      break;
+    case WSAEOPNOTSUPP:
+      errno = EOPNOTSUPP;
+      break;
+    case WSAEAFNOSUPPORT:
+      errno = EAFNOSUPPORT;
+      break;
+    case WSAEADDRINUSE:
+      errno = EADDRINUSE;
+      break;
+    case WSAEADDRNOTAVAIL:
+      errno = EADDRNOTAVAIL;
+      break;
+    case WSAENETDOWN:
+      errno = ENETDOWN;
+      break;
+    case WSAENETUNREACH:
+      errno = ENETUNREACH;
+      break;
+    case WSAENETRESET:
+      errno = ENETRESET;
+      break;
+    case WSAECONNABORTED:
+      errno = ECONNABORTED;
+      break;
+    case WSAECONNRESET:
+      errno = ECONNRESET;
+      break;
+    case WSAENOBUFS:
+      errno = ENOBUFS;
+      break;
+    case WSAEISCONN:
+      errno = EISCONN;
+      break;
+    case WSAENOTCONN:
+      errno = ENOTCONN;
+      break;
+    case WSAETIMEDOUT:
+      errno = ETIMEDOUT;
+      break;
+    case WSAECONNREFUSED:
+      errno = ECONNREFUSED;
+      break;
+    case WSAELOOP:
+      errno = ELOOP;
+      break;
+    case WSAEHOSTUNREACH:
+      errno = EHOSTUNREACH;
+      break;
+    default:
+      errno = (err > 10000 && err < 10025) ? err - 10000 : err;
+      break;
+    }
+}
diff --git a/src/grep/gnulib-tests/warn-on-use.h b/src/grep/gnulib-tests/warn-on-use.h
new file mode 100644
index 0000000..612937a
--- /dev/null
+++ b/src/grep/gnulib-tests/warn-on-use.h
@@ -0,0 +1,149 @@
+/* A C macro for emitting warnings if a function is used.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as published
+   by the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* _GL_WARN_ON_USE (function, "literal string") issues a declaration
+   for FUNCTION which will then trigger a compiler warning containing
+   the text of "literal string" anywhere that function is called, if
+   supported by the compiler.  If the compiler does not support this
+   feature, the macro expands to an unused extern declaration.
+
+   _GL_WARN_ON_USE_ATTRIBUTE ("literal string") expands to the
+   attribute used in _GL_WARN_ON_USE.  If the compiler does not support
+   this feature, it expands to empty.
+
+   These macros are useful for marking a function as a potential
+   portability trap, with the intent that "literal string" include
+   instructions on the replacement function that should be used
+   instead.
+   _GL_WARN_ON_USE is for functions with 'extern' linkage.
+   _GL_WARN_ON_USE_ATTRIBUTE is for functions with 'static' or 'inline'
+   linkage.
+
+   However, one of the reasons that a function is a portability trap is
+   if it has the wrong signature.  Declaring FUNCTION with a different
+   signature in C is a compilation error, so this macro must use the
+   same type as any existing declaration so that programs that avoid
+   the problematic FUNCTION do not fail to compile merely because they
+   included a header that poisoned the function.  But this implies that
+   _GL_WARN_ON_USE is only safe to use if FUNCTION is known to already
+   have a declaration.  Use of this macro implies that there must not
+   be any other macro hiding the declaration of FUNCTION; but
+   undefining FUNCTION first is part of the poisoning process anyway
+   (although for symbols that are provided only via a macro, the result
+   is a compilation error rather than a warning containing
+   "literal string").  Also note that in C++, it is only safe to use if
+   FUNCTION has no overloads.
+
+   For an example, it is possible to poison 'getline' by:
+   - adding a call to gl_WARN_ON_USE_PREPARE([[#include <stdio.h>]],
+     [getline]) in configure.ac, which potentially defines
+     HAVE_RAW_DECL_GETLINE
+   - adding this code to a header that wraps the system <stdio.h>:
+     #undef getline
+     #if HAVE_RAW_DECL_GETLINE
+     _GL_WARN_ON_USE (getline, "getline is required by POSIX 2008, but"
+       "not universally present; use the gnulib module getline");
+     #endif
+
+   It is not possible to directly poison global variables.  But it is
+   possible to write a wrapper accessor function, and poison that
+   (less common usage, like &environ, will cause a compilation error
+   rather than issue the nice warning, but the end result of informing
+   the developer about their portability problem is still achieved):
+     #if HAVE_RAW_DECL_ENVIRON
+     static char ***
+     rpl_environ (void) { return &environ; }
+     _GL_WARN_ON_USE (rpl_environ, "environ is not always properly declared");
+     # undef environ
+     # define environ (*rpl_environ ())
+     #endif
+   or better (avoiding contradictory use of 'static' and 'extern'):
+     #if HAVE_RAW_DECL_ENVIRON
+     static char ***
+     _GL_WARN_ON_USE_ATTRIBUTE ("environ is not always properly declared")
+     rpl_environ (void) { return &environ; }
+     # undef environ
+     # define environ (*rpl_environ ())
+     #endif
+   */
+#ifndef _GL_WARN_ON_USE
+
+# if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__)
+/* A compiler attribute is available in gcc versions 4.3.0 and later.  */
+#  define _GL_WARN_ON_USE(function, message) \
+extern __typeof__ (function) function __attribute__ ((__warning__ (message)))
+#  define _GL_WARN_ON_USE_ATTRIBUTE(message) \
+  __attribute__ ((__warning__ (message)))
+# elif __clang_major__ >= 4
+/* Another compiler attribute is available in clang.  */
+#  define _GL_WARN_ON_USE(function, message) \
+extern __typeof__ (function) function \
+  __attribute__ ((__diagnose_if__ (1, message, "warning")))
+#  define _GL_WARN_ON_USE_ATTRIBUTE(message) \
+  __attribute__ ((__diagnose_if__ (1, message, "warning")))
+# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
+/* Verify the existence of the function.  */
+#  define _GL_WARN_ON_USE(function, message) \
+extern __typeof__ (function) function
+#  define _GL_WARN_ON_USE_ATTRIBUTE(message)
+# else /* Unsupported.  */
+#  define _GL_WARN_ON_USE(function, message) \
+_GL_WARN_EXTERN_C int _gl_warn_on_use
+#  define _GL_WARN_ON_USE_ATTRIBUTE(message)
+# endif
+#endif
+
+/* _GL_WARN_ON_USE_CXX (function, rettype_gcc, rettype_clang, parameters_and_attributes, "message")
+   is like _GL_WARN_ON_USE (function, "message"), except that in C++ mode the
+   function is declared with the given prototype, consisting of return type,
+   parameters, and attributes.
+   This variant is useful for overloaded functions in C++. _GL_WARN_ON_USE does
+   not work in this case.  */
+#ifndef _GL_WARN_ON_USE_CXX
+# if !defined __cplusplus
+#  define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
+     _GL_WARN_ON_USE (function, msg)
+# else
+#  if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__)
+/* A compiler attribute is available in gcc versions 4.3.0 and later.  */
+#   define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
+extern rettype_gcc function parameters_and_attributes \
+  __attribute__ ((__warning__ (msg)))
+#  elif __clang_major__ >= 4
+/* Another compiler attribute is available in clang.  */
+#   define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
+extern rettype_clang function parameters_and_attributes \
+  __attribute__ ((__diagnose_if__ (1, msg, "warning")))
+#  elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
+/* Verify the existence of the function.  */
+#   define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
+extern rettype_gcc function parameters_and_attributes
+#  else /* Unsupported.  */
+#   define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
+_GL_WARN_EXTERN_C int _gl_warn_on_use
+#  endif
+# endif
+#endif
+
+/* _GL_WARN_EXTERN_C declaration;
+   performs the declaration with C linkage.  */
+#ifndef _GL_WARN_EXTERN_C
+# if defined __cplusplus
+#  define _GL_WARN_EXTERN_C extern "C"
+# else
+#  define _GL_WARN_EXTERN_C extern
+# endif
+#endif
diff --git a/src/grep/gnulib-tests/windows-thread.c b/src/grep/gnulib-tests/windows-thread.c
new file mode 100644
index 0000000..a60967f
--- /dev/null
+++ b/src/grep/gnulib-tests/windows-thread.c
@@ -0,0 +1,243 @@
+/* Creating and controlling threads (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-win32.h.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "windows-thread.h"
+
+#include <errno.h>
+#include <process.h>
+#include <stdlib.h>
+
+#include "windows-once.h"
+#include "windows-tls.h"
+
+/* The Thread-Local Storage (TLS) key that allows to access each thread's
+   'struct glwthread_thread_struct *' pointer.  */
+static DWORD self_key = (DWORD)-1;
+
+/* Initializes self_key.  This function must only be called once.  */
+static void
+do_init_self_key (void)
+{
+  self_key = TlsAlloc ();
+  /* If this fails, we're hosed.  */
+  if (self_key == (DWORD)-1)
+    abort ();
+}
+
+/* Initializes self_key.  */
+static void
+init_self_key (void)
+{
+  static glwthread_once_t once = GLWTHREAD_ONCE_INIT;
+  glwthread_once (&once, do_init_self_key);
+}
+
+/* This structure contains information about a thread.
+   It is stored in TLS under key self_key.  */
+struct glwthread_thread_struct
+{
+  /* Fields for managing the handle.  */
+  HANDLE volatile handle;
+  CRITICAL_SECTION handle_lock;
+  /* Fields for managing the exit value.  */
+  BOOL volatile detached;
+  void * volatile result;
+  /* Fields for managing the thread start.  */
+  void * (*func) (void *);
+  void *arg;
+};
+
+/* Return a real HANDLE object for the current thread.  */
+static HANDLE
+get_current_thread_handle (void)
+{
+  HANDLE this_handle;
+
+  /* GetCurrentThread() returns a pseudo-handle, i.e. only a symbolic
+     identifier, not a real handle.  */
+  if (!DuplicateHandle (GetCurrentProcess (), GetCurrentThread (),
+                        GetCurrentProcess (), &this_handle,
+                        0, FALSE, DUPLICATE_SAME_ACCESS))
+    abort ();
+  return this_handle;
+}
+
+glwthread_thread_t
+glwthread_thread_self (void)
+{
+  glwthread_thread_t thread;
+
+  if (self_key == (DWORD)-1)
+    init_self_key ();
+  thread = TlsGetValue (self_key);
+  if (thread == NULL)
+    {
+      /* This happens only in threads that have not been created through
+         glthread_create(), such as the main thread.  */
+      for (;;)
+        {
+          thread =
+            (struct glwthread_thread_struct *)
+            malloc (sizeof (struct glwthread_thread_struct));
+          if (thread != NULL)
+            break;
+          /* Memory allocation failed.  There is not much we can do.  Have to
+             busy-loop, waiting for the availability of memory.  */
+          Sleep (1);
+        }
+
+      thread->handle = get_current_thread_handle ();
+      InitializeCriticalSection (&thread->handle_lock);
+      thread->detached = FALSE; /* This can lead to a memory leak.  */
+      thread->result = NULL; /* just to be deterministic */
+      TlsSetValue (self_key, thread);
+    }
+  return thread;
+}
+
+/* The main function of a freshly creating thread.  It's a wrapper around
+   the FUNC and ARG arguments passed to glthread_create_func.  */
+static unsigned int WINAPI
+wrapper_func (void *varg)
+{
+  struct glwthread_thread_struct *thread =
+    (struct glwthread_thread_struct *) varg;
+
+  EnterCriticalSection (&thread->handle_lock);
+  /* Create a new handle for the thread only if the parent thread did not yet
+     fill in the handle.  */
+  if (thread->handle == NULL)
+    thread->handle = get_current_thread_handle ();
+  LeaveCriticalSection (&thread->handle_lock);
+
+  if (self_key == (DWORD)-1)
+    init_self_key ();
+  TlsSetValue (self_key, thread);
+
+  /* Run the thread.  Store the exit value if the thread was not terminated
+     otherwise.  */
+  thread->result = thread->func (thread->arg);
+
+  /* Process the TLS destructors.  */
+  glwthread_tls_process_destructors ();
+
+  if (thread->detached)
+    {
+      /* Clean up the thread, like thrd_join would do.  */
+      DeleteCriticalSection (&thread->handle_lock);
+      CloseHandle (thread->handle);
+      free (thread);
+    }
+
+  return 0;
+}
+
+int
+glwthread_thread_create (glwthread_thread_t *threadp, unsigned int attr,
+                         void * (*func) (void *), void *arg)
+{
+  struct glwthread_thread_struct *thread =
+    (struct glwthread_thread_struct *)
+    malloc (sizeof (struct glwthread_thread_struct));
+  if (thread == NULL)
+    return ENOMEM;
+  thread->handle = NULL;
+  InitializeCriticalSection (&thread->handle_lock);
+  thread->detached = (attr & GLWTHREAD_ATTR_DETACHED ? TRUE : FALSE);
+  thread->result = NULL; /* just to be deterministic */
+  thread->func = func;
+  thread->arg = arg;
+
+  {
+    unsigned int thread_id;
+    HANDLE thread_handle;
+
+    thread_handle = (HANDLE)
+      _beginthreadex (NULL, 100000, wrapper_func, thread, 0, &thread_id);
+      /* calls CreateThread with the same arguments */
+    if (thread_handle == NULL)
+      {
+        DeleteCriticalSection (&thread->handle_lock);
+        free (thread);
+        return EAGAIN;
+      }
+
+    EnterCriticalSection (&thread->handle_lock);
+    if (thread->handle == NULL)
+      thread->handle = thread_handle;
+    else
+      /* thread->handle was already set by the thread itself.  */
+      CloseHandle (thread_handle);
+    LeaveCriticalSection (&thread->handle_lock);
+
+    *threadp = thread;
+    return 0;
+  }
+}
+
+int
+glwthread_thread_join (glwthread_thread_t thread, void **retvalp)
+{
+  if (thread == NULL)
+    return EINVAL;
+
+  if (thread == glwthread_thread_self ())
+    return EDEADLK;
+
+  if (thread->detached)
+    return EINVAL;
+
+  if (WaitForSingleObject (thread->handle, INFINITE) == WAIT_FAILED)
+    return EINVAL;
+
+  if (retvalp != NULL)
+    *retvalp = thread->result;
+
+  DeleteCriticalSection (&thread->handle_lock);
+  CloseHandle (thread->handle);
+  free (thread);
+
+  return 0;
+}
+
+int
+glwthread_thread_detach (glwthread_thread_t thread)
+{
+  if (thread == NULL)
+    return EINVAL;
+
+  if (thread->detached)
+    return EINVAL;
+
+  thread->detached = TRUE;
+  return 0;
+}
+
+void
+glwthread_thread_exit (void *retval)
+{
+  glwthread_thread_t thread = glwthread_thread_self ();
+  thread->result = retval;
+  glwthread_tls_process_destructors ();
+  _endthreadex (0); /* calls ExitThread (0) */
+  abort ();
+}
diff --git a/src/grep/gnulib-tests/windows-thread.h b/src/grep/gnulib-tests/windows-thread.h
new file mode 100644
index 0000000..680565d
--- /dev/null
+++ b/src/grep/gnulib-tests/windows-thread.h
@@ -0,0 +1,55 @@
+/* Creating and controlling threads (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-win32.h.  */
+
+#ifndef _WINDOWS_THREAD_H
+#define _WINDOWS_THREAD_H
+
+#define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#include <windows.h>
+
+/* The glwthread_thread_t is a pointer to a structure in memory.
+   Why not the thread handle?  If it were the thread handle, it would be hard
+   to implement glwthread_thread_self() (since GetCurrentThread () returns a
+   pseudo-handle, DuplicateHandle (GetCurrentThread ()) returns a handle that
+   must be closed afterwards, and there is no function for quickly retrieving
+   a thread handle from its id).
+   Why not the thread id?  I tried it.  It did not work: Sometimes ids appeared
+   that did not belong to running threads, and glthread_join failed with ESRCH.
+ */
+typedef struct glwthread_thread_struct *glwthread_thread_t;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* attr is a bit mask, consisting of the following bits: */
+#define GLWTHREAD_ATTR_DETACHED 1
+extern int glwthread_thread_create (glwthread_thread_t *threadp,
+                                    unsigned int attr,
+                                    void * (*func) (void *), void *arg);
+extern int glwthread_thread_join (glwthread_thread_t thread, void **retvalp);
+extern int glwthread_thread_detach (glwthread_thread_t thread);
+extern glwthread_thread_t glwthread_thread_self (void);
+extern _Noreturn void glwthread_thread_exit (void *retval);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _WINDOWS_THREAD_H */
diff --git a/src/grep/gnulib-tests/windows-tls.c b/src/grep/gnulib-tests/windows-tls.c
new file mode 100644
index 0000000..dfadcfd
--- /dev/null
+++ b/src/grep/gnulib-tests/windows-tls.c
@@ -0,0 +1,339 @@
+/* Thread-local storage (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "windows-tls.h"
+
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+
+#include "windows-once.h"
+
+void *
+glwthread_tls_get (glwthread_tls_key_t key)
+{
+  return TlsGetValue (key);
+}
+
+int
+glwthread_tls_set (glwthread_tls_key_t key, void *value)
+{
+  if (!TlsSetValue (key, value))
+    return EINVAL;
+  return 0;
+}
+
+/* The following variables keep track of TLS keys with non-NULL destructor.  */
+
+static glwthread_once_t dtor_table_init_once = GLWTHREAD_ONCE_INIT;
+
+static CRITICAL_SECTION dtor_table_lock;
+
+struct dtor { glwthread_tls_key_t key; void (*destructor) (void *); };
+
+/* The table of dtors.  */
+static struct dtor *dtor_table;
+/* Number of active entries in the dtor_table.  */
+static unsigned int dtors_count;
+/* Valid indices into dtor_table are 0..dtors_used-1.  */
+static unsigned int dtors_used;
+/* Allocation size of dtor_table.  */
+static unsigned int dtors_allocated;
+/* Invariant: 0 <= dtors_count <= dtors_used <= dtors_allocated.  */
+
+/* Number of threads that are currently processing destructors.  */
+static unsigned int dtor_processing_threads;
+
+static void
+dtor_table_initialize (void)
+{
+  InitializeCriticalSection (&dtor_table_lock);
+  /* The other variables are already initialized to NULL or 0, respectively.  */
+}
+
+static void
+dtor_table_ensure_initialized (void)
+{
+  glwthread_once (&dtor_table_init_once, dtor_table_initialize);
+}
+
+/* Shrinks dtors_used down to dtors_count, by replacing inactive entries
+   with active ones.  */
+static void
+dtor_table_shrink_used (void)
+{
+  unsigned int i = 0;
+  unsigned int j = dtors_used;
+
+  for (;;)
+    {
+      BOOL i_found = FALSE;
+      BOOL j_found = FALSE;
+      /* Find the next inactive entry, from the left.  */
+      for (; i < dtors_count;)
+        {
+          if (dtor_table[i].destructor == NULL)
+            {
+              i_found = TRUE;
+              break;
+            }
+          i++;
+        }
+
+      /* Find the next active entry, from the right.  */
+      for (; j > dtors_count;)
+        {
+          j--;
+          if (dtor_table[j].destructor != NULL)
+            {
+              j_found = TRUE;
+              break;
+            }
+        }
+
+      if (i_found != j_found)
+        /* dtors_count was apparently wrong.  */
+        abort ();
+
+      if (!i_found)
+        break;
+
+      /* i_found and j_found are TRUE.  Swap the two entries.  */
+      dtor_table[i] = dtor_table[j];
+
+      i++;
+    }
+
+  dtors_used = dtors_count;
+}
+
+void
+glwthread_tls_process_destructors (void)
+{
+  unsigned int repeat;
+
+  dtor_table_ensure_initialized ();
+
+  EnterCriticalSection (&dtor_table_lock);
+  if (dtor_processing_threads == 0)
+    {
+      /* Now it's the appropriate time for shrinking dtors_used.  */
+      if (dtors_used > dtors_count)
+        dtor_table_shrink_used ();
+    }
+  dtor_processing_threads++;
+
+  for (repeat = GLWTHREAD_DESTRUCTOR_ITERATIONS; repeat > 0; repeat--)
+    {
+      unsigned int destructors_run = 0;
+
+      /* Iterate across dtor_table.  We don't need to make a copy of dtor_table,
+         because
+           * When another thread calls glwthread_tls_key_create with a non-NULL
+             destructor argument, this will possibly reallocate the dtor_table
+             array and increase dtors_allocated as well as dtors_used and
+             dtors_count, but it will not change dtors_used nor the contents of
+             the first dtors_used entries of dtor_table.
+           * When another thread calls glwthread_tls_key_delete, this will
+             possibly set some 'destructor' member to NULL, thus marking an
+             entry as inactive, but it will not otherwise change dtors_used nor
+             the contents of the first dtors_used entries of dtor_table.  */
+      unsigned int i_limit = dtors_used;
+      unsigned int i;
+
+      for (i = 0; i < i_limit; i++)
+        {
+          struct dtor current = dtor_table[i];
+          if (current.destructor != NULL)
+            {
+              /* The current dtor has not been deleted yet.  */
+              void *current_value = glwthread_tls_get (current.key);
+              if (current_value != NULL)
+                {
+                  /* The current value is non-NULL.  Run the destructor.  */
+                  glwthread_tls_set (current.key, NULL);
+                  LeaveCriticalSection (&dtor_table_lock);
+                  current.destructor (current_value);
+                  EnterCriticalSection (&dtor_table_lock);
+                  destructors_run++;
+                }
+            }
+        }
+
+      /* When all TLS values were already NULL, no further iterations are
+         needed.  */
+      if (destructors_run == 0)
+        break;
+    }
+
+  dtor_processing_threads--;
+  LeaveCriticalSection (&dtor_table_lock);
+}
+
+int
+glwthread_tls_key_create (glwthread_tls_key_t *keyp, void (*destructor) (void *))
+{
+  if (destructor != NULL)
+    {
+      dtor_table_ensure_initialized ();
+
+      EnterCriticalSection (&dtor_table_lock);
+      if (dtor_processing_threads == 0)
+        {
+          /* Now it's the appropriate time for shrinking dtors_used.  */
+          if (dtors_used > dtors_count)
+            dtor_table_shrink_used ();
+        }
+
+      while (dtors_used == dtors_allocated)
+        {
+          /* Need to grow the dtor_table.  */
+          unsigned int new_allocated = 2 * dtors_allocated + 1;
+          if (new_allocated < 7)
+            new_allocated = 7;
+          if (new_allocated <= dtors_allocated) /* overflow? */
+            new_allocated = UINT_MAX;
+
+          LeaveCriticalSection (&dtor_table_lock);
+          {
+            struct dtor *new_table =
+              (struct dtor *) malloc (new_allocated * sizeof (struct dtor));
+            if (new_table == NULL)
+              return ENOMEM;
+            EnterCriticalSection (&dtor_table_lock);
+            /* Attention! dtors_used, dtors_allocated may have changed!  */
+            if (dtors_used < new_allocated)
+              {
+                if (dtors_allocated < new_allocated)
+                  {
+                    /* The new_table is useful.  */
+                    memcpy (new_table, dtor_table,
+                            dtors_used * sizeof (struct dtor));
+                    dtor_table = new_table;
+                    dtors_allocated = new_allocated;
+                  }
+                else
+                  {
+                    /* The new_table is not useful, since another thread
+                       meanwhile allocated a drop_table that is at least
+                       as large.  */
+                    free (new_table);
+                  }
+                break;
+              }
+            /* The new_table is not useful, since other threads increased
+               dtors_used.  Free it any retry.  */
+            free (new_table);
+          }
+        }
+      /* Here dtors_used < dtors_allocated.  */
+      {
+        /* Allocate a new key.  */
+        glwthread_tls_key_t key = TlsAlloc ();
+        if (key == (DWORD)-1)
+          {
+            LeaveCriticalSection (&dtor_table_lock);
+            return EAGAIN;
+          }
+        /* Store the new dtor in the dtor_table, after all used entries.
+           Do not overwrite inactive entries with indices < dtors_used, in order
+           not to disturb glwthread_tls_process_destructors invocations that may
+           be executing in other threads.  */
+        dtor_table[dtors_used].key = key;
+        dtor_table[dtors_used].destructor = destructor;
+        dtors_used++;
+        dtors_count++;
+        LeaveCriticalSection (&dtor_table_lock);
+        *keyp = key;
+      }
+    }
+  else
+    {
+      /* Allocate a new key.  */
+      glwthread_tls_key_t key = TlsAlloc ();
+      if (key == (DWORD)-1)
+        return EAGAIN;
+      *keyp = key;
+    }
+  return 0;
+}
+
+int
+glwthread_tls_key_delete (glwthread_tls_key_t key)
+{
+  /* Should the destructor be called for all threads that are currently running?
+     Probably not, because
+       - ISO C does not specify when the destructor is to be invoked at all.
+       - In POSIX, the destructor functions specified with pthread_key_create()
+         are invoked at thread exit.
+       - It would be hard to implement, because there are no primitives for
+         accessing thread-specific values from a different thread.  */
+  dtor_table_ensure_initialized ();
+
+  EnterCriticalSection (&dtor_table_lock);
+  if (dtor_processing_threads == 0)
+    {
+      /* Now it's the appropriate time for shrinking dtors_used.  */
+      if (dtors_used > dtors_count)
+        dtor_table_shrink_used ();
+      /* Here dtors_used == dtors_count.  */
+
+      /* Find the key in dtor_table.  */
+      {
+        unsigned int i_limit = dtors_used;
+        unsigned int i;
+
+        for (i = 0; i < i_limit; i++)
+          if (dtor_table[i].key == key)
+            {
+              if (i < dtors_used - 1)
+                /* Swap the entries i and dtors_used - 1.  */
+                dtor_table[i] = dtor_table[dtors_used - 1];
+              dtors_count = dtors_used = dtors_used - 1;
+              break;
+            }
+      }
+    }
+  else
+    {
+      /* Be careful not to disturb the glwthread_tls_process_destructors
+         invocations that are executing in other threads.  */
+      unsigned int i_limit = dtors_used;
+      unsigned int i;
+
+      for (i = 0; i < i_limit; i++)
+        if (dtor_table[i].destructor != NULL /* skip inactive entries */
+            && dtor_table[i].key == key)
+          {
+            /* Mark this entry as inactive.  */
+            dtor_table[i].destructor = NULL;
+            dtors_count = dtors_count - 1;
+            break;
+          }
+    }
+  LeaveCriticalSection (&dtor_table_lock);
+  /* Now we have ensured that glwthread_tls_process_destructors will no longer
+     use this key.  */
+
+  if (!TlsFree (key))
+    return EINVAL;
+  return 0;
+}
diff --git a/src/grep/gnulib-tests/windows-tls.h b/src/grep/gnulib-tests/windows-tls.h
new file mode 100644
index 0000000..c822d25
--- /dev/null
+++ b/src/grep/gnulib-tests/windows-tls.h
@@ -0,0 +1,42 @@
+/* Thread-local storage (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.  */
+
+#ifndef _WINDOWS_TLS_H
+#define _WINDOWS_TLS_H
+
+#define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#include <windows.h>
+
+typedef DWORD glwthread_tls_key_t;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern int glwthread_tls_key_create (glwthread_tls_key_t *keyp, void (*destructor) (void *));
+extern void *glwthread_tls_get (glwthread_tls_key_t key);
+extern int glwthread_tls_set (glwthread_tls_key_t key, void *value);
+extern int glwthread_tls_key_delete (glwthread_tls_key_t key);
+extern void glwthread_tls_process_destructors (void);
+#define GLWTHREAD_DESTRUCTOR_ITERATIONS 4
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _WINDOWS_TLS_H */
diff --git a/src/grep/gnulib-tests/xsize.c b/src/grep/gnulib-tests/xsize.c
new file mode 100644
index 0000000..b3d73a2
--- /dev/null
+++ b/src/grep/gnulib-tests/xsize.c
@@ -0,0 +1,21 @@
+/* Checked size_t computations.
+
+   Copyright (C) 2012-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#define XSIZE_INLINE _GL_EXTERN_INLINE
+#include "xsize.h"
diff --git a/src/grep/gnulib-tests/xsize.h b/src/grep/gnulib-tests/xsize.h
new file mode 100644
index 0000000..91fa877
--- /dev/null
+++ b/src/grep/gnulib-tests/xsize.h
@@ -0,0 +1,108 @@
+/* xsize.h -- Checked size_t computations.
+
+   Copyright (C) 2003, 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _XSIZE_H
+#define _XSIZE_H
+
+/* Get size_t.  */
+#include <stddef.h>
+
+/* Get SIZE_MAX.  */
+#include <limits.h>
+#if HAVE_STDINT_H
+# include <stdint.h>
+#endif
+
+/* Get ATTRIBUTE_PURE.  */
+#include "attribute.h"
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef XSIZE_INLINE
+# define XSIZE_INLINE _GL_INLINE
+#endif
+
+/* The size of memory objects is often computed through expressions of
+   type size_t. Example:
+      void* p = malloc (header_size + n * element_size).
+   These computations can lead to overflow.  When this happens, malloc()
+   returns a piece of memory that is way too small, and the program then
+   crashes while attempting to fill the memory.
+   To avoid this, the functions and macros in this file check for overflow.
+   The convention is that SIZE_MAX represents overflow.
+   malloc (SIZE_MAX) is not guaranteed to fail -- think of a malloc
+   implementation that uses mmap --, it's recommended to use size_overflow_p()
+   or size_in_bounds_p() before invoking malloc().
+   The example thus becomes:
+      size_t size = xsum (header_size, xtimes (n, element_size));
+      void *p = (size_in_bounds_p (size) ? malloc (size) : NULL);
+*/
+
+/* Convert an arbitrary value >= 0 to type size_t.  */
+#define xcast_size_t(N) \
+  ((N) <= SIZE_MAX ? (size_t) (N) : SIZE_MAX)
+
+/* Sum of two sizes, with overflow check.  */
+XSIZE_INLINE size_t ATTRIBUTE_PURE
+xsum (size_t size1, size_t size2)
+{
+  size_t sum = size1 + size2;
+  return (sum >= size1 ? sum : SIZE_MAX);
+}
+
+/* Sum of three sizes, with overflow check.  */
+XSIZE_INLINE size_t ATTRIBUTE_PURE
+xsum3 (size_t size1, size_t size2, size_t size3)
+{
+  return xsum (xsum (size1, size2), size3);
+}
+
+/* Sum of four sizes, with overflow check.  */
+XSIZE_INLINE size_t ATTRIBUTE_PURE
+xsum4 (size_t size1, size_t size2, size_t size3, size_t size4)
+{
+  return xsum (xsum (xsum (size1, size2), size3), size4);
+}
+
+/* Maximum of two sizes, with overflow check.  */
+XSIZE_INLINE size_t ATTRIBUTE_PURE
+xmax (size_t size1, size_t size2)
+{
+  /* No explicit check is needed here, because for any n:
+     max (SIZE_MAX, n) == SIZE_MAX and max (n, SIZE_MAX) == SIZE_MAX.  */
+  return (size1 >= size2 ? size1 : size2);
+}
+
+/* Multiplication of a count with an element size, with overflow check.
+   The count must be >= 0 and the element size must be > 0.
+   This is a macro, not a function, so that it works correctly even
+   when N is of a wider type and N > SIZE_MAX.  */
+#define xtimes(N, ELSIZE) \
+  ((N) <= SIZE_MAX / (ELSIZE) ? (size_t) (N) * (ELSIZE) : SIZE_MAX)
+
+/* Check for overflow.  */
+#define size_overflow_p(SIZE) \
+  ((SIZE) == SIZE_MAX)
+/* Check against overflow.  */
+#define size_in_bounds_p(SIZE) \
+  ((SIZE) != SIZE_MAX)
+
+_GL_INLINE_HEADER_END
+
+#endif /* _XSIZE_H */
diff --git a/src/grep/gnulib-tests/xstrtol-error.c b/src/grep/gnulib-tests/xstrtol-error.c
new file mode 100644
index 0000000..80b650f
--- /dev/null
+++ b/src/grep/gnulib-tests/xstrtol-error.c
@@ -0,0 +1,98 @@
+/* A more useful interface to strtol.
+
+   Copyright (C) 1995-1996, 1998-1999, 2001-2004, 2006-2021 Free Software
+   Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+#include "xstrtol-error.h"
+
+#include <stdlib.h>
+
+#include "error.h"
+#include "exitfail.h"
+#include "gettext.h"
+
+#define N_(msgid) msgid
+
+/* Report an error for an invalid integer in an option argument.
+
+   ERR is the error code returned by one of the xstrto* functions.
+
+   Use OPT_IDX to decide whether to print the short option string "C"
+   or "-C" or a long option string derived from LONG_OPTION.  OPT_IDX
+   is -2 if the short option "C" was used, without any leading "-"; it
+   is -1 if the short option "-C" was used; otherwise it is an index
+   into LONG_OPTIONS, which should have a name preceded by two '-'
+   characters.
+
+   ARG is the option-argument containing the integer.
+
+   After reporting an error, exit with status EXIT_STATUS if it is
+   nonzero.  */
+
+static void
+xstrtol_error (enum strtol_error err,
+               int opt_idx, char c, struct option const *long_options,
+               char const *arg,
+               int exit_status)
+{
+  char const *hyphens = "--";
+  char const *msgid;
+  char const *option;
+  char option_buffer[2];
+
+  switch (err)
+    {
+    default:
+      abort ();
+
+    case LONGINT_INVALID:
+      msgid = N_("invalid %s%s argument '%s'");
+      break;
+
+    case LONGINT_INVALID_SUFFIX_CHAR:
+    case LONGINT_INVALID_SUFFIX_CHAR_WITH_OVERFLOW:
+      msgid = N_("invalid suffix in %s%s argument '%s'");
+      break;
+
+    case LONGINT_OVERFLOW:
+      msgid = N_("%s%s argument '%s' too large");
+      break;
+    }
+
+  if (opt_idx < 0)
+    {
+      hyphens -= opt_idx;
+      option_buffer[0] = c;
+      option_buffer[1] = '\0';
+      option = option_buffer;
+    }
+  else
+    option = long_options[opt_idx].name;
+
+  error (exit_status, 0, gettext (msgid), hyphens, option, arg);
+}
+
+/* Like xstrtol_error, except exit with a failure status.  */
+
+void
+xstrtol_fatal (enum strtol_error err,
+               int opt_idx, char c, struct option const *long_options,
+               char const *arg)
+{
+  xstrtol_error (err, opt_idx, c, long_options, arg, exit_failure);
+  abort ();
+}
diff --git a/src/grep/gnulib-tests/xstrtol-error.h b/src/grep/gnulib-tests/xstrtol-error.h
new file mode 100644
index 0000000..83abc68
--- /dev/null
+++ b/src/grep/gnulib-tests/xstrtol-error.h
@@ -0,0 +1,45 @@
+/* Error reporting interface for xstrto* functions.
+
+   Copyright (C) 1995-1996, 1998-1999, 2001-2004, 2006-2021 Free Software
+   Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef XSTRTOL_ERROR_H_
+# define XSTRTOL_ERROR_H_ 1
+
+# include "xstrtol.h"
+
+# include <getopt.h>
+
+/* Report an error for an invalid integer in an option argument.
+
+   ERR is the error code returned by one of the xstrto* functions.
+
+   Use OPT_IDX to decide whether to print the short option string "C"
+   or "-C" or a long option string derived from LONG_OPTION.  OPT_IDX
+   is -2 if the short option "C" was used, without any leading "-"; it
+   is -1 if the short option "-C" was used; otherwise it is an index
+   into LONG_OPTIONS, which should have a name preceded by two '-'
+   characters.
+
+   ARG is the option-argument containing the integer.
+
+   After reporting an error, exit with a failure status.  */
+
+_Noreturn void xstrtol_fatal (enum strtol_error,
+                              int, char, struct option const *,
+                              char const *);
+
+#endif /* not XSTRTOL_ERROR_H_ */
diff --git a/src/grep/gnulib-tests/zerosize-ptr.h b/src/grep/gnulib-tests/zerosize-ptr.h
new file mode 100644
index 0000000..bfeff50
--- /dev/null
+++ b/src/grep/gnulib-tests/zerosize-ptr.h
@@ -0,0 +1,82 @@
+/* Return a pointer to a zero-size object in memory.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* ISO C 99 does not allow memcmp(), memchr() etc. to be invoked with a NULL
+   argument.  Therefore this file produces a non-NULL pointer which cannot
+   be dereferenced, if possible.  */
+
+/* On Android, when targeting Android 4.4 or older with a GCC toolchain,
+   prevent a compilation error
+     "error: call to 'mmap' declared with attribute error: mmap is not
+      available with _FILE_OFFSET_BITS=64 when using GCC until android-21.
+      Either raise your minSdkVersion, disable _FILE_OFFSET_BITS=64, or
+      switch to Clang."
+   The files that we access in this compilation unit are less than 2 GB
+   large.  */
+#if defined __ANDROID__
+# undef _FILE_OFFSET_BITS
+# undef __USE_FILE_OFFSET64
+#endif
+
+#include <stdlib.h>
+
+/* Test whether mmap() and mprotect() are available.
+   We don't use HAVE_MMAP, because AC_FUNC_MMAP would not define it on HP-UX.
+   HAVE_MPROTECT is not enough, because mingw does not have mmap() but has an
+   mprotect() function in libgcc.a.
+   And OS/2 kLIBC has <sys/mman.h> and mprotect(), but not mmap().  */
+#if HAVE_SYS_MMAN_H && HAVE_MPROTECT && !defined __KLIBC__
+# include <fcntl.h>
+# include <unistd.h>
+# include <sys/types.h>
+# include <sys/mman.h>
+/* Define MAP_FILE when it isn't otherwise.  */
+# ifndef MAP_FILE
+#  define MAP_FILE 0
+# endif
+#endif
+
+/* Return a pointer to a zero-size object in memory (that is, actually, a
+   pointer to a page boundary where the previous page is readable and writable
+   and the next page is neither readable not writable), if possible.
+   Return NULL otherwise.  */
+
+static void *
+zerosize_ptr (void)
+{
+/* Use mmap and mprotect when they exist.  Don't test HAVE_MMAP, because it is
+   not defined on HP-UX 11 (since it does not support MAP_FIXED).  */
+#if HAVE_SYS_MMAN_H && HAVE_MPROTECT && !defined __KLIBC__
+# if HAVE_MAP_ANONYMOUS
+  const int flags = MAP_ANONYMOUS | MAP_PRIVATE;
+  const int fd = -1;
+# else /* !HAVE_MAP_ANONYMOUS */
+  const int flags = MAP_FILE | MAP_PRIVATE;
+  int fd = open ("/dev/zero", O_RDONLY, 0666);
+  if (fd >= 0)
+# endif
+    {
+      int pagesize = getpagesize ();
+      char *two_pages =
+        (char *) mmap (NULL, 2 * pagesize, PROT_READ | PROT_WRITE,
+                       flags, fd, 0);
+      if (two_pages != (char *)(-1)
+          && mprotect (two_pages + pagesize, pagesize, PROT_NONE) == 0)
+        return two_pages + pagesize;
+    }
+#endif
+  return NULL;
+}
diff --git a/src/grep/lib/Makefile.am b/src/grep/lib/Makefile.am
new file mode 100644
index 0000000..6a75199
--- /dev/null
+++ b/src/grep/lib/Makefile.am
@@ -0,0 +1,41 @@
+# Copyright 1997-1998, 2005-2021 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
+AM_CFLAGS =
+AM_CPPFLAGS =
+BUILT_SOURCES =
+CLEANFILES =
+EXTRA_DIST =
+MAINTAINERCLEANFILES =
+MOSTLYCLEANDIRS =
+MOSTLYCLEANFILES =
+SUFFIXES =
+noinst_LIBRARIES =
+
+include gnulib.mk
+
+AM_CFLAGS += $(GNULIB_WARN_CFLAGS) $(WERROR_CFLAGS)
+
+nodist_libgreputils_a_SOURCES = colorize.c
+libgreputils_a_SOURCES += colorize.h
+EXTRA_DIST += colorize-posix.c colorize-w32.c
+CLEANFILES += colorize.c
+colorize.c:
+	$(AM_V_at)echo '#include <$(COLORIZE_SOURCE)>' >$@-t
+	$(AM_V_at)mv $@-t $@
+
+libgreputils_a_LIBADD += $(LIBOBJS) $(ALLOCA)
+libgreputils_a_DEPENDENCIES += $(LIBOBJS) $(ALLOCA)
diff --git a/src/grep/lib/Makefile.in b/src/grep/lib/Makefile.in
new file mode 100644
index 0000000..9d6564e
--- /dev/null
+++ b/src/grep/lib/Makefile.in
@@ -0,0 +1,4314 @@
+# Makefile.in generated by automake 1.16d from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+# Copyright 1997-1998, 2005-2021 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
+# Copyright (C) 2002-2021 Free Software Foundation, Inc.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This file is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this file.  If not, see <https://www.gnu.org/licenses/>.
+#
+# As a special exception to the GNU General Public License,
+# this file may be distributed as part of a program that
+# contains a configuration script generated by Autoconf, under
+# the same distribution terms as the rest of that program.
+#
+# Generated by gnulib-tool.
+# Reproduce by:
+# gnulib-tool --import --local-dir=gl \
+#  --lib=libgreputils \
+#  --source-base=lib \
+#  --m4-base=m4 \
+#  --doc-base=doc \
+#  --tests-base=gnulib-tests \
+#  --aux-dir=build-aux \
+#  --with-tests \
+#  --makefile-name=gnulib.mk \
+#  --no-conditional-dependencies \
+#  --no-libtool \
+#  --macro-prefix=gl \
+#  --avoid=lock-tests \
+#  --avoid=mbrtowc-tests \
+#  --avoid=update-copyright-tests \
+#  alloca \
+#  announce-gen \
+#  argmatch \
+#  c-ctype \
+#  c-stack \
+#  c-strcase \
+#  closeout \
+#  configmake \
+#  dfa \
+#  dirname-lgpl \
+#  do-release-commit-and-tag \
+#  error \
+#  exclude \
+#  fcntl-h \
+#  fdl \
+#  fnmatch \
+#  fstatat \
+#  fts \
+#  getopt-gnu \
+#  getpagesize \
+#  getprogname \
+#  gettext-h \
+#  git-version-gen \
+#  gitlog-to-changelog \
+#  gnu-web-doc-update \
+#  gnupload \
+#  hash \
+#  ignore-value \
+#  intprops \
+#  inttypes \
+#  isatty \
+#  isblank \
+#  iswctype \
+#  largefile \
+#  locale \
+#  lseek \
+#  maintainer-makefile \
+#  malloc-gnu \
+#  manywarnings \
+#  mbrlen \
+#  mbrtowc \
+#  memchr \
+#  memchr2 \
+#  mempcpy \
+#  minmax \
+#  obstack \
+#  openat-safer \
+#  perl \
+#  propername \
+#  rawmemchr \
+#  readme-release \
+#  realloc-gnu \
+#  regex \
+#  safe-read \
+#  same-inode \
+#  ssize_t \
+#  stddef \
+#  stdlib \
+#  stpcpy \
+#  strerror \
+#  string \
+#  strstr \
+#  strtoull \
+#  strtoumax \
+#  sys_stat \
+#  unistd \
+#  unlocked-io \
+#  update-copyright \
+#  useless-if-before-free \
+#  verify \
+#  version-etc-fsf \
+#  wchar \
+#  wcrtomb \
+#  wctob \
+#  wctype-h \
+#  windows-stat-inodes \
+#  xalloc \
+#  xbinary-io \
+#  xstrtoimax
+
+VPATH = @srcdir@
+am__is_gnu_make = { \
+  if test -z '$(MAKELEVEL)'; then \
+    false; \
+  elif test -n '$(MAKE_HOST)'; then \
+    true; \
+  elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+    true; \
+  else \
+    false; \
+  fi; \
+}
+am__make_running_with_option = \
+  case $${target_option-} in \
+      ?) ;; \
+      *) echo "am__make_running_with_option: internal error: invalid" \
+              "target option '$${target_option-}' specified" >&2; \
+         exit 1;; \
+  esac; \
+  has_opt=no; \
+  sane_makeflags=$$MAKEFLAGS; \
+  if $(am__is_gnu_make); then \
+    sane_makeflags=$$MFLAGS; \
+  else \
+    case $$MAKEFLAGS in \
+      *\\[\ \	]*) \
+        bs=\\; \
+        sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \
+          | sed "s/$$bs$$bs[$$bs $$bs	]*//g"`;; \
+    esac; \
+  fi; \
+  skip_next=no; \
+  strip_trailopt () \
+  { \
+    flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \
+  }; \
+  for flg in $$sane_makeflags; do \
+    test $$skip_next = yes && { skip_next=no; continue; }; \
+    case $$flg in \
+      *=*|--*) continue;; \
+        -*I) strip_trailopt 'I'; skip_next=yes;; \
+      -*I?*) strip_trailopt 'I';; \
+        -*O) strip_trailopt 'O'; skip_next=yes;; \
+      -*O?*) strip_trailopt 'O';; \
+        -*l) strip_trailopt 'l'; skip_next=yes;; \
+      -*l?*) strip_trailopt 'l';; \
+      -[dEDm]) skip_next=yes;; \
+      -[JT]) skip_next=yes;; \
+    esac; \
+    case $$flg in \
+      *$$target_option*) has_opt=yes; break;; \
+    esac; \
+  done; \
+  test $$has_opt = yes
+am__make_dryrun = (target_option=n; $(am__make_running_with_option))
+am__make_keepgoing = (target_option=k; $(am__make_running_with_option))
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+@GL_GENERATE_SIGSEGV_H_TRUE@am__append_1 = sigsegv.c stackvma.c
+@LIBUNISTRING_COMPILE_UNISTR_U8_MBTOUCR_TRUE@am__append_2 = unistr/u8-mbtoucr.c
+@LIBUNISTRING_COMPILE_UNISTR_U8_UCTOMB_TRUE@am__append_3 = unistr/u8-uctomb.c unistr/u8-uctomb-aux.c
+@LIBUNISTRING_COMPILE_UNIWIDTH_WIDTH_TRUE@am__append_4 = uniwidth/width.c
+subdir = lib
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/m4/00gnulib.m4 \
+	$(top_srcdir)/m4/__inline.m4 \
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+GL_GNULIB_ALPHASORT = @GL_GNULIB_ALPHASORT@
+GL_GNULIB_ATOLL = @GL_GNULIB_ATOLL@
+GL_GNULIB_BIND = @GL_GNULIB_BIND@
+GL_GNULIB_BTOWC = @GL_GNULIB_BTOWC@
+GL_GNULIB_CALLOC_POSIX = @GL_GNULIB_CALLOC_POSIX@
+GL_GNULIB_CANONICALIZE_FILE_NAME = @GL_GNULIB_CANONICALIZE_FILE_NAME@
+GL_GNULIB_CHDIR = @GL_GNULIB_CHDIR@
+GL_GNULIB_CHOWN = @GL_GNULIB_CHOWN@
+GL_GNULIB_CLOSE = @GL_GNULIB_CLOSE@
+GL_GNULIB_CLOSEDIR = @GL_GNULIB_CLOSEDIR@
+GL_GNULIB_CONNECT = @GL_GNULIB_CONNECT@
+GL_GNULIB_COPY_FILE_RANGE = @GL_GNULIB_COPY_FILE_RANGE@
+GL_GNULIB_CREAT = @GL_GNULIB_CREAT@
+GL_GNULIB_CTIME = @GL_GNULIB_CTIME@
+GL_GNULIB_DIRFD = @GL_GNULIB_DIRFD@
+GL_GNULIB_DPRINTF = @GL_GNULIB_DPRINTF@
+GL_GNULIB_DUP = @GL_GNULIB_DUP@
+GL_GNULIB_DUP2 = @GL_GNULIB_DUP2@
+GL_GNULIB_DUP3 = @GL_GNULIB_DUP3@
+GL_GNULIB_DUPLOCALE = @GL_GNULIB_DUPLOCALE@
+GL_GNULIB_ENVIRON = @GL_GNULIB_ENVIRON@
+GL_GNULIB_EUIDACCESS = @GL_GNULIB_EUIDACCESS@
+GL_GNULIB_EXECL = @GL_GNULIB_EXECL@
+GL_GNULIB_EXECLE = @GL_GNULIB_EXECLE@
+GL_GNULIB_EXECLP = @GL_GNULIB_EXECLP@
+GL_GNULIB_EXECV = @GL_GNULIB_EXECV@
+GL_GNULIB_EXECVE = @GL_GNULIB_EXECVE@
+GL_GNULIB_EXECVP = @GL_GNULIB_EXECVP@
+GL_GNULIB_EXECVPE = @GL_GNULIB_EXECVPE@
+GL_GNULIB_EXPLICIT_BZERO = @GL_GNULIB_EXPLICIT_BZERO@
+GL_GNULIB_FACCESSAT = @GL_GNULIB_FACCESSAT@
+GL_GNULIB_FCHDIR = @GL_GNULIB_FCHDIR@
+GL_GNULIB_FCHMODAT = @GL_GNULIB_FCHMODAT@
+GL_GNULIB_FCHOWNAT = @GL_GNULIB_FCHOWNAT@
+GL_GNULIB_FCLOSE = @GL_GNULIB_FCLOSE@
+GL_GNULIB_FCNTL = @GL_GNULIB_FCNTL@
+GL_GNULIB_FDATASYNC = @GL_GNULIB_FDATASYNC@
+GL_GNULIB_FDOPEN = @GL_GNULIB_FDOPEN@
+GL_GNULIB_FDOPENDIR = @GL_GNULIB_FDOPENDIR@
+GL_GNULIB_FFLUSH = @GL_GNULIB_FFLUSH@
+GL_GNULIB_FFSL = @GL_GNULIB_FFSL@
+GL_GNULIB_FFSLL = @GL_GNULIB_FFSLL@
+GL_GNULIB_FGETC = @GL_GNULIB_FGETC@
+GL_GNULIB_FGETS = @GL_GNULIB_FGETS@
+GL_GNULIB_FNMATCH = @GL_GNULIB_FNMATCH@
+GL_GNULIB_FOPEN = @GL_GNULIB_FOPEN@
+GL_GNULIB_FPRINTF = @GL_GNULIB_FPRINTF@
+GL_GNULIB_FPRINTF_POSIX = @GL_GNULIB_FPRINTF_POSIX@
+GL_GNULIB_FPURGE = @GL_GNULIB_FPURGE@
+GL_GNULIB_FPUTC = @GL_GNULIB_FPUTC@
+GL_GNULIB_FPUTS = @GL_GNULIB_FPUTS@
+GL_GNULIB_FREAD = @GL_GNULIB_FREAD@
+GL_GNULIB_FREE_POSIX = @GL_GNULIB_FREE_POSIX@
+GL_GNULIB_FREOPEN = @GL_GNULIB_FREOPEN@
+GL_GNULIB_FSCANF = @GL_GNULIB_FSCANF@
+GL_GNULIB_FSEEK = @GL_GNULIB_FSEEK@
+GL_GNULIB_FSEEKO = @GL_GNULIB_FSEEKO@
+GL_GNULIB_FSTAT = @GL_GNULIB_FSTAT@
+GL_GNULIB_FSTATAT = @GL_GNULIB_FSTATAT@
+GL_GNULIB_FSYNC = @GL_GNULIB_FSYNC@
+GL_GNULIB_FTELL = @GL_GNULIB_FTELL@
+GL_GNULIB_FTELLO = @GL_GNULIB_FTELLO@
+GL_GNULIB_FTRUNCATE = @GL_GNULIB_FTRUNCATE@
+GL_GNULIB_FUTIMENS = @GL_GNULIB_FUTIMENS@
+GL_GNULIB_FWRITE = @GL_GNULIB_FWRITE@
+GL_GNULIB_GETC = @GL_GNULIB_GETC@
+GL_GNULIB_GETCHAR = @GL_GNULIB_GETCHAR@
+GL_GNULIB_GETCWD = @GL_GNULIB_GETCWD@
+GL_GNULIB_GETDELIM = @GL_GNULIB_GETDELIM@
+GL_GNULIB_GETDOMAINNAME = @GL_GNULIB_GETDOMAINNAME@
+GL_GNULIB_GETDTABLESIZE = @GL_GNULIB_GETDTABLESIZE@
+GL_GNULIB_GETENTROPY = @GL_GNULIB_GETENTROPY@
+GL_GNULIB_GETGROUPS = @GL_GNULIB_GETGROUPS@
+GL_GNULIB_GETHOSTNAME = @GL_GNULIB_GETHOSTNAME@
+GL_GNULIB_GETLINE = @GL_GNULIB_GETLINE@
+GL_GNULIB_GETLOADAVG = @GL_GNULIB_GETLOADAVG@
+GL_GNULIB_GETLOGIN = @GL_GNULIB_GETLOGIN@
+GL_GNULIB_GETLOGIN_R = @GL_GNULIB_GETLOGIN_R@
+GL_GNULIB_GETOPT_POSIX = @GL_GNULIB_GETOPT_POSIX@
+GL_GNULIB_GETPAGESIZE = @GL_GNULIB_GETPAGESIZE@
+GL_GNULIB_GETPASS = @GL_GNULIB_GETPASS@
+GL_GNULIB_GETPEERNAME = @GL_GNULIB_GETPEERNAME@
+GL_GNULIB_GETSOCKNAME = @GL_GNULIB_GETSOCKNAME@
+GL_GNULIB_GETSOCKOPT = @GL_GNULIB_GETSOCKOPT@
+GL_GNULIB_GETSUBOPT = @GL_GNULIB_GETSUBOPT@
+GL_GNULIB_GETTIMEOFDAY = @GL_GNULIB_GETTIMEOFDAY@
+GL_GNULIB_GETUMASK = @GL_GNULIB_GETUMASK@
+GL_GNULIB_GETUSERSHELL = @GL_GNULIB_GETUSERSHELL@
+GL_GNULIB_GRANTPT = @GL_GNULIB_GRANTPT@
+GL_GNULIB_GROUP_MEMBER = @GL_GNULIB_GROUP_MEMBER@
+GL_GNULIB_ICONV = @GL_GNULIB_ICONV@
+GL_GNULIB_IMAXABS = @GL_GNULIB_IMAXABS@
+GL_GNULIB_IMAXDIV = @GL_GNULIB_IMAXDIV@
+GL_GNULIB_INET_NTOP = @GL_GNULIB_INET_NTOP@
+GL_GNULIB_INET_PTON = @GL_GNULIB_INET_PTON@
+GL_GNULIB_IOCTL = @GL_GNULIB_IOCTL@
+GL_GNULIB_ISATTY = @GL_GNULIB_ISATTY@
+GL_GNULIB_ISBLANK = @GL_GNULIB_ISBLANK@
+GL_GNULIB_ISWBLANK = @GL_GNULIB_ISWBLANK@
+GL_GNULIB_ISWCTYPE = @GL_GNULIB_ISWCTYPE@
+GL_GNULIB_ISWDIGIT = @GL_GNULIB_ISWDIGIT@
+GL_GNULIB_ISWXDIGIT = @GL_GNULIB_ISWXDIGIT@
+GL_GNULIB_LCHMOD = @GL_GNULIB_LCHMOD@
+GL_GNULIB_LCHOWN = @GL_GNULIB_LCHOWN@
+GL_GNULIB_LINK = @GL_GNULIB_LINK@
+GL_GNULIB_LINKAT = @GL_GNULIB_LINKAT@
+GL_GNULIB_LISTEN = @GL_GNULIB_LISTEN@
+GL_GNULIB_LOCALECONV = @GL_GNULIB_LOCALECONV@
+GL_GNULIB_LOCALENAME = @GL_GNULIB_LOCALENAME@
+GL_GNULIB_LOCALTIME = @GL_GNULIB_LOCALTIME@
+GL_GNULIB_LSEEK = @GL_GNULIB_LSEEK@
+GL_GNULIB_LSTAT = @GL_GNULIB_LSTAT@
+GL_GNULIB_MALLOC_POSIX = @GL_GNULIB_MALLOC_POSIX@
+GL_GNULIB_MBRLEN = @GL_GNULIB_MBRLEN@
+GL_GNULIB_MBRTOWC = @GL_GNULIB_MBRTOWC@
+GL_GNULIB_MBSCASECMP = @GL_GNULIB_MBSCASECMP@
+GL_GNULIB_MBSCASESTR = @GL_GNULIB_MBSCASESTR@
+GL_GNULIB_MBSCHR = @GL_GNULIB_MBSCHR@
+GL_GNULIB_MBSCSPN = @GL_GNULIB_MBSCSPN@
+GL_GNULIB_MBSINIT = @GL_GNULIB_MBSINIT@
+GL_GNULIB_MBSLEN = @GL_GNULIB_MBSLEN@
+GL_GNULIB_MBSNCASECMP = @GL_GNULIB_MBSNCASECMP@
+GL_GNULIB_MBSNLEN = @GL_GNULIB_MBSNLEN@
+GL_GNULIB_MBSNRTOWCS = @GL_GNULIB_MBSNRTOWCS@
+GL_GNULIB_MBSPBRK = @GL_GNULIB_MBSPBRK@
+GL_GNULIB_MBSPCASECMP = @GL_GNULIB_MBSPCASECMP@
+GL_GNULIB_MBSRCHR = @GL_GNULIB_MBSRCHR@
+GL_GNULIB_MBSRTOWCS = @GL_GNULIB_MBSRTOWCS@
+GL_GNULIB_MBSSEP = @GL_GNULIB_MBSSEP@
+GL_GNULIB_MBSSPN = @GL_GNULIB_MBSSPN@
+GL_GNULIB_MBSSTR = @GL_GNULIB_MBSSTR@
+GL_GNULIB_MBSTOK_R = @GL_GNULIB_MBSTOK_R@
+GL_GNULIB_MBTOWC = @GL_GNULIB_MBTOWC@
+GL_GNULIB_MDA_ACCESS = @GL_GNULIB_MDA_ACCESS@
+GL_GNULIB_MDA_CHDIR = @GL_GNULIB_MDA_CHDIR@
+GL_GNULIB_MDA_CHMOD = @GL_GNULIB_MDA_CHMOD@
+GL_GNULIB_MDA_CLOSE = @GL_GNULIB_MDA_CLOSE@
+GL_GNULIB_MDA_CREAT = @GL_GNULIB_MDA_CREAT@
+GL_GNULIB_MDA_DUP = @GL_GNULIB_MDA_DUP@
+GL_GNULIB_MDA_DUP2 = @GL_GNULIB_MDA_DUP2@
+GL_GNULIB_MDA_ECVT = @GL_GNULIB_MDA_ECVT@
+GL_GNULIB_MDA_EXECL = @GL_GNULIB_MDA_EXECL@
+GL_GNULIB_MDA_EXECLE = @GL_GNULIB_MDA_EXECLE@
+GL_GNULIB_MDA_EXECLP = @GL_GNULIB_MDA_EXECLP@
+GL_GNULIB_MDA_EXECV = @GL_GNULIB_MDA_EXECV@
+GL_GNULIB_MDA_EXECVE = @GL_GNULIB_MDA_EXECVE@
+GL_GNULIB_MDA_EXECVP = @GL_GNULIB_MDA_EXECVP@
+GL_GNULIB_MDA_EXECVPE = @GL_GNULIB_MDA_EXECVPE@
+GL_GNULIB_MDA_FCLOSEALL = @GL_GNULIB_MDA_FCLOSEALL@
+GL_GNULIB_MDA_FCVT = @GL_GNULIB_MDA_FCVT@
+GL_GNULIB_MDA_FDOPEN = @GL_GNULIB_MDA_FDOPEN@
+GL_GNULIB_MDA_FILENO = @GL_GNULIB_MDA_FILENO@
+GL_GNULIB_MDA_GCVT = @GL_GNULIB_MDA_GCVT@
+GL_GNULIB_MDA_GETCWD = @GL_GNULIB_MDA_GETCWD@
+GL_GNULIB_MDA_GETPID = @GL_GNULIB_MDA_GETPID@
+GL_GNULIB_MDA_GETW = @GL_GNULIB_MDA_GETW@
+GL_GNULIB_MDA_ISATTY = @GL_GNULIB_MDA_ISATTY@
+GL_GNULIB_MDA_LSEEK = @GL_GNULIB_MDA_LSEEK@
+GL_GNULIB_MDA_MEMCCPY = @GL_GNULIB_MDA_MEMCCPY@
+GL_GNULIB_MDA_MKDIR = @GL_GNULIB_MDA_MKDIR@
+GL_GNULIB_MDA_MKTEMP = @GL_GNULIB_MDA_MKTEMP@
+GL_GNULIB_MDA_OPEN = @GL_GNULIB_MDA_OPEN@
+GL_GNULIB_MDA_PUTENV = @GL_GNULIB_MDA_PUTENV@
+GL_GNULIB_MDA_PUTW = @GL_GNULIB_MDA_PUTW@
+GL_GNULIB_MDA_READ = @GL_GNULIB_MDA_READ@
+GL_GNULIB_MDA_RMDIR = @GL_GNULIB_MDA_RMDIR@
+GL_GNULIB_MDA_STRDUP = @GL_GNULIB_MDA_STRDUP@
+GL_GNULIB_MDA_SWAB = @GL_GNULIB_MDA_SWAB@
+GL_GNULIB_MDA_TEMPNAM = @GL_GNULIB_MDA_TEMPNAM@
+GL_GNULIB_MDA_TZSET = @GL_GNULIB_MDA_TZSET@
+GL_GNULIB_MDA_UMASK = @GL_GNULIB_MDA_UMASK@
+GL_GNULIB_MDA_UNLINK = @GL_GNULIB_MDA_UNLINK@
+GL_GNULIB_MDA_WCSDUP = @GL_GNULIB_MDA_WCSDUP@
+GL_GNULIB_MDA_WRITE = @GL_GNULIB_MDA_WRITE@
+GL_GNULIB_MEMCHR = @GL_GNULIB_MEMCHR@
+GL_GNULIB_MEMMEM = @GL_GNULIB_MEMMEM@
+GL_GNULIB_MEMPCPY = @GL_GNULIB_MEMPCPY@
+GL_GNULIB_MEMRCHR = @GL_GNULIB_MEMRCHR@
+GL_GNULIB_MKDIR = @GL_GNULIB_MKDIR@
+GL_GNULIB_MKDIRAT = @GL_GNULIB_MKDIRAT@
+GL_GNULIB_MKDTEMP = @GL_GNULIB_MKDTEMP@
+GL_GNULIB_MKFIFO = @GL_GNULIB_MKFIFO@
+GL_GNULIB_MKFIFOAT = @GL_GNULIB_MKFIFOAT@
+GL_GNULIB_MKNOD = @GL_GNULIB_MKNOD@
+GL_GNULIB_MKNODAT = @GL_GNULIB_MKNODAT@
+GL_GNULIB_MKOSTEMP = @GL_GNULIB_MKOSTEMP@
+GL_GNULIB_MKOSTEMPS = @GL_GNULIB_MKOSTEMPS@
+GL_GNULIB_MKSTEMP = @GL_GNULIB_MKSTEMP@
+GL_GNULIB_MKSTEMPS = @GL_GNULIB_MKSTEMPS@
+GL_GNULIB_MKTIME = @GL_GNULIB_MKTIME@
+GL_GNULIB_NANOSLEEP = @GL_GNULIB_NANOSLEEP@
+GL_GNULIB_NL_LANGINFO = @GL_GNULIB_NL_LANGINFO@
+GL_GNULIB_NONBLOCKING = @GL_GNULIB_NONBLOCKING@
+GL_GNULIB_OBSTACK_PRINTF = @GL_GNULIB_OBSTACK_PRINTF@
+GL_GNULIB_OBSTACK_PRINTF_POSIX = @GL_GNULIB_OBSTACK_PRINTF_POSIX@
+GL_GNULIB_OPEN = @GL_GNULIB_OPEN@
+GL_GNULIB_OPENAT = @GL_GNULIB_OPENAT@
+GL_GNULIB_OPENDIR = @GL_GNULIB_OPENDIR@
+GL_GNULIB_OVERRIDES_STRUCT_STAT = @GL_GNULIB_OVERRIDES_STRUCT_STAT@
+GL_GNULIB_PCLOSE = @GL_GNULIB_PCLOSE@
+GL_GNULIB_PERROR = @GL_GNULIB_PERROR@
+GL_GNULIB_PIPE = @GL_GNULIB_PIPE@
+GL_GNULIB_PIPE2 = @GL_GNULIB_PIPE2@
+GL_GNULIB_POPEN = @GL_GNULIB_POPEN@
+GL_GNULIB_POSIX_MEMALIGN = @GL_GNULIB_POSIX_MEMALIGN@
+GL_GNULIB_POSIX_OPENPT = @GL_GNULIB_POSIX_OPENPT@
+GL_GNULIB_PREAD = @GL_GNULIB_PREAD@
+GL_GNULIB_PRINTF = @GL_GNULIB_PRINTF@
+GL_GNULIB_PRINTF_POSIX = @GL_GNULIB_PRINTF_POSIX@
+GL_GNULIB_PSELECT = @GL_GNULIB_PSELECT@
+GL_GNULIB_PTHREAD_COND = @GL_GNULIB_PTHREAD_COND@
+GL_GNULIB_PTHREAD_MUTEX = @GL_GNULIB_PTHREAD_MUTEX@
+GL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK = @GL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK@
+GL_GNULIB_PTHREAD_ONCE = @GL_GNULIB_PTHREAD_ONCE@
+GL_GNULIB_PTHREAD_RWLOCK = @GL_GNULIB_PTHREAD_RWLOCK@
+GL_GNULIB_PTHREAD_SIGMASK = @GL_GNULIB_PTHREAD_SIGMASK@
+GL_GNULIB_PTHREAD_SPIN = @GL_GNULIB_PTHREAD_SPIN@
+GL_GNULIB_PTHREAD_THREAD = @GL_GNULIB_PTHREAD_THREAD@
+GL_GNULIB_PTHREAD_TSS = @GL_GNULIB_PTHREAD_TSS@
+GL_GNULIB_PTSNAME = @GL_GNULIB_PTSNAME@
+GL_GNULIB_PTSNAME_R = @GL_GNULIB_PTSNAME_R@
+GL_GNULIB_PUTC = @GL_GNULIB_PUTC@
+GL_GNULIB_PUTCHAR = @GL_GNULIB_PUTCHAR@
+GL_GNULIB_PUTENV = @GL_GNULIB_PUTENV@
+GL_GNULIB_PUTS = @GL_GNULIB_PUTS@
+GL_GNULIB_PWRITE = @GL_GNULIB_PWRITE@
+GL_GNULIB_QSORT_R = @GL_GNULIB_QSORT_R@
+GL_GNULIB_RAISE = @GL_GNULIB_RAISE@
+GL_GNULIB_RANDOM = @GL_GNULIB_RANDOM@
+GL_GNULIB_RANDOM_R = @GL_GNULIB_RANDOM_R@
+GL_GNULIB_RAWMEMCHR = @GL_GNULIB_RAWMEMCHR@
+GL_GNULIB_READ = @GL_GNULIB_READ@
+GL_GNULIB_READDIR = @GL_GNULIB_READDIR@
+GL_GNULIB_READLINK = @GL_GNULIB_READLINK@
+GL_GNULIB_READLINKAT = @GL_GNULIB_READLINKAT@
+GL_GNULIB_REALLOCARRAY = @GL_GNULIB_REALLOCARRAY@
+GL_GNULIB_REALLOC_POSIX = @GL_GNULIB_REALLOC_POSIX@
+GL_GNULIB_REALPATH = @GL_GNULIB_REALPATH@
+GL_GNULIB_RECV = @GL_GNULIB_RECV@
+GL_GNULIB_RECVFROM = @GL_GNULIB_RECVFROM@
+GL_GNULIB_REMOVE = @GL_GNULIB_REMOVE@
+GL_GNULIB_RENAME = @GL_GNULIB_RENAME@
+GL_GNULIB_RENAMEAT = @GL_GNULIB_RENAMEAT@
+GL_GNULIB_REWINDDIR = @GL_GNULIB_REWINDDIR@
+GL_GNULIB_RMDIR = @GL_GNULIB_RMDIR@
+GL_GNULIB_RPMATCH = @GL_GNULIB_RPMATCH@
+GL_GNULIB_SCANDIR = @GL_GNULIB_SCANDIR@
+GL_GNULIB_SCANF = @GL_GNULIB_SCANF@
+GL_GNULIB_SCHED_YIELD = @GL_GNULIB_SCHED_YIELD@
+GL_GNULIB_SECURE_GETENV = @GL_GNULIB_SECURE_GETENV@
+GL_GNULIB_SELECT = @GL_GNULIB_SELECT@
+GL_GNULIB_SEND = @GL_GNULIB_SEND@
+GL_GNULIB_SENDTO = @GL_GNULIB_SENDTO@
+GL_GNULIB_SETENV = @GL_GNULIB_SETENV@
+GL_GNULIB_SETHOSTNAME = @GL_GNULIB_SETHOSTNAME@
+GL_GNULIB_SETLOCALE = @GL_GNULIB_SETLOCALE@
+GL_GNULIB_SETLOCALE_NULL = @GL_GNULIB_SETLOCALE_NULL@
+GL_GNULIB_SETSOCKOPT = @GL_GNULIB_SETSOCKOPT@
+GL_GNULIB_SHUTDOWN = @GL_GNULIB_SHUTDOWN@
+GL_GNULIB_SIGABBREV_NP = @GL_GNULIB_SIGABBREV_NP@
+GL_GNULIB_SIGACTION = @GL_GNULIB_SIGACTION@
+GL_GNULIB_SIGDESCR_NP = @GL_GNULIB_SIGDESCR_NP@
+GL_GNULIB_SIGNAL_H_SIGPIPE = @GL_GNULIB_SIGNAL_H_SIGPIPE@
+GL_GNULIB_SIGPROCMASK = @GL_GNULIB_SIGPROCMASK@
+GL_GNULIB_SLEEP = @GL_GNULIB_SLEEP@
+GL_GNULIB_SNPRINTF = @GL_GNULIB_SNPRINTF@
+GL_GNULIB_SOCKET = @GL_GNULIB_SOCKET@
+GL_GNULIB_SPRINTF_POSIX = @GL_GNULIB_SPRINTF_POSIX@
+GL_GNULIB_STAT = @GL_GNULIB_STAT@
+GL_GNULIB_STDIO_H_NONBLOCKING = @GL_GNULIB_STDIO_H_NONBLOCKING@
+GL_GNULIB_STDIO_H_SIGPIPE = @GL_GNULIB_STDIO_H_SIGPIPE@
+GL_GNULIB_STPCPY = @GL_GNULIB_STPCPY@
+GL_GNULIB_STPNCPY = @GL_GNULIB_STPNCPY@
+GL_GNULIB_STRCASESTR = @GL_GNULIB_STRCASESTR@
+GL_GNULIB_STRCHRNUL = @GL_GNULIB_STRCHRNUL@
+GL_GNULIB_STRDUP = @GL_GNULIB_STRDUP@
+GL_GNULIB_STRERROR = @GL_GNULIB_STRERROR@
+GL_GNULIB_STRERRORNAME_NP = @GL_GNULIB_STRERRORNAME_NP@
+GL_GNULIB_STRERROR_R = @GL_GNULIB_STRERROR_R@
+GL_GNULIB_STRFTIME = @GL_GNULIB_STRFTIME@
+GL_GNULIB_STRNCAT = @GL_GNULIB_STRNCAT@
+GL_GNULIB_STRNDUP = @GL_GNULIB_STRNDUP@
+GL_GNULIB_STRNLEN = @GL_GNULIB_STRNLEN@
+GL_GNULIB_STRPBRK = @GL_GNULIB_STRPBRK@
+GL_GNULIB_STRPTIME = @GL_GNULIB_STRPTIME@
+GL_GNULIB_STRSEP = @GL_GNULIB_STRSEP@
+GL_GNULIB_STRSIGNAL = @GL_GNULIB_STRSIGNAL@
+GL_GNULIB_STRSTR = @GL_GNULIB_STRSTR@
+GL_GNULIB_STRTOD = @GL_GNULIB_STRTOD@
+GL_GNULIB_STRTOIMAX = @GL_GNULIB_STRTOIMAX@
+GL_GNULIB_STRTOK_R = @GL_GNULIB_STRTOK_R@
+GL_GNULIB_STRTOL = @GL_GNULIB_STRTOL@
+GL_GNULIB_STRTOLD = @GL_GNULIB_STRTOLD@
+GL_GNULIB_STRTOLL = @GL_GNULIB_STRTOLL@
+GL_GNULIB_STRTOUL = @GL_GNULIB_STRTOUL@
+GL_GNULIB_STRTOULL = @GL_GNULIB_STRTOULL@
+GL_GNULIB_STRTOUMAX = @GL_GNULIB_STRTOUMAX@
+GL_GNULIB_STRVERSCMP = @GL_GNULIB_STRVERSCMP@
+GL_GNULIB_SYMLINK = @GL_GNULIB_SYMLINK@
+GL_GNULIB_SYMLINKAT = @GL_GNULIB_SYMLINKAT@
+GL_GNULIB_SYSTEM_POSIX = @GL_GNULIB_SYSTEM_POSIX@
+GL_GNULIB_TIMEGM = @GL_GNULIB_TIMEGM@
+GL_GNULIB_TIMESPEC_GET = @GL_GNULIB_TIMESPEC_GET@
+GL_GNULIB_TIME_R = @GL_GNULIB_TIME_R@
+GL_GNULIB_TIME_RZ = @GL_GNULIB_TIME_RZ@
+GL_GNULIB_TMPFILE = @GL_GNULIB_TMPFILE@
+GL_GNULIB_TOWCTRANS = @GL_GNULIB_TOWCTRANS@
+GL_GNULIB_TRUNCATE = @GL_GNULIB_TRUNCATE@
+GL_GNULIB_TTYNAME_R = @GL_GNULIB_TTYNAME_R@
+GL_GNULIB_TZSET = @GL_GNULIB_TZSET@
+GL_GNULIB_UNISTD_H_GETOPT = @GL_GNULIB_UNISTD_H_GETOPT@
+GL_GNULIB_UNISTD_H_NONBLOCKING = @GL_GNULIB_UNISTD_H_NONBLOCKING@
+GL_GNULIB_UNISTD_H_SIGPIPE = @GL_GNULIB_UNISTD_H_SIGPIPE@
+GL_GNULIB_UNLINK = @GL_GNULIB_UNLINK@
+GL_GNULIB_UNLINKAT = @GL_GNULIB_UNLINKAT@
+GL_GNULIB_UNLOCKPT = @GL_GNULIB_UNLOCKPT@
+GL_GNULIB_UNSETENV = @GL_GNULIB_UNSETENV@
+GL_GNULIB_USLEEP = @GL_GNULIB_USLEEP@
+GL_GNULIB_UTIMENSAT = @GL_GNULIB_UTIMENSAT@
+GL_GNULIB_VASPRINTF = @GL_GNULIB_VASPRINTF@
+GL_GNULIB_VDPRINTF = @GL_GNULIB_VDPRINTF@
+GL_GNULIB_VFPRINTF = @GL_GNULIB_VFPRINTF@
+GL_GNULIB_VFPRINTF_POSIX = @GL_GNULIB_VFPRINTF_POSIX@
+GL_GNULIB_VFSCANF = @GL_GNULIB_VFSCANF@
+GL_GNULIB_VPRINTF = @GL_GNULIB_VPRINTF@
+GL_GNULIB_VPRINTF_POSIX = @GL_GNULIB_VPRINTF_POSIX@
+GL_GNULIB_VSCANF = @GL_GNULIB_VSCANF@
+GL_GNULIB_VSNPRINTF = @GL_GNULIB_VSNPRINTF@
+GL_GNULIB_VSPRINTF_POSIX = @GL_GNULIB_VSPRINTF_POSIX@
+GL_GNULIB_WCPCPY = @GL_GNULIB_WCPCPY@
+GL_GNULIB_WCPNCPY = @GL_GNULIB_WCPNCPY@
+GL_GNULIB_WCRTOMB = @GL_GNULIB_WCRTOMB@
+GL_GNULIB_WCSCASECMP = @GL_GNULIB_WCSCASECMP@
+GL_GNULIB_WCSCAT = @GL_GNULIB_WCSCAT@
+GL_GNULIB_WCSCHR = @GL_GNULIB_WCSCHR@
+GL_GNULIB_WCSCMP = @GL_GNULIB_WCSCMP@
+GL_GNULIB_WCSCOLL = @GL_GNULIB_WCSCOLL@
+GL_GNULIB_WCSCPY = @GL_GNULIB_WCSCPY@
+GL_GNULIB_WCSCSPN = @GL_GNULIB_WCSCSPN@
+GL_GNULIB_WCSDUP = @GL_GNULIB_WCSDUP@
+GL_GNULIB_WCSFTIME = @GL_GNULIB_WCSFTIME@
+GL_GNULIB_WCSLEN = @GL_GNULIB_WCSLEN@
+GL_GNULIB_WCSNCASECMP = @GL_GNULIB_WCSNCASECMP@
+GL_GNULIB_WCSNCAT = @GL_GNULIB_WCSNCAT@
+GL_GNULIB_WCSNCMP = @GL_GNULIB_WCSNCMP@
+GL_GNULIB_WCSNCPY = @GL_GNULIB_WCSNCPY@
+GL_GNULIB_WCSNLEN = @GL_GNULIB_WCSNLEN@
+GL_GNULIB_WCSNRTOMBS = @GL_GNULIB_WCSNRTOMBS@
+GL_GNULIB_WCSPBRK = @GL_GNULIB_WCSPBRK@
+GL_GNULIB_WCSRCHR = @GL_GNULIB_WCSRCHR@
+GL_GNULIB_WCSRTOMBS = @GL_GNULIB_WCSRTOMBS@
+GL_GNULIB_WCSSPN = @GL_GNULIB_WCSSPN@
+GL_GNULIB_WCSSTR = @GL_GNULIB_WCSSTR@
+GL_GNULIB_WCSTOK = @GL_GNULIB_WCSTOK@
+GL_GNULIB_WCSWIDTH = @GL_GNULIB_WCSWIDTH@
+GL_GNULIB_WCSXFRM = @GL_GNULIB_WCSXFRM@
+GL_GNULIB_WCTOB = @GL_GNULIB_WCTOB@
+GL_GNULIB_WCTOMB = @GL_GNULIB_WCTOMB@
+GL_GNULIB_WCTRANS = @GL_GNULIB_WCTRANS@
+GL_GNULIB_WCTYPE = @GL_GNULIB_WCTYPE@
+GL_GNULIB_WCWIDTH = @GL_GNULIB_WCWIDTH@
+GL_GNULIB_WMEMCHR = @GL_GNULIB_WMEMCHR@
+GL_GNULIB_WMEMCMP = @GL_GNULIB_WMEMCMP@
+GL_GNULIB_WMEMCPY = @GL_GNULIB_WMEMCPY@
+GL_GNULIB_WMEMMOVE = @GL_GNULIB_WMEMMOVE@
+GL_GNULIB_WMEMPCPY = @GL_GNULIB_WMEMPCPY@
+GL_GNULIB_WMEMSET = @GL_GNULIB_WMEMSET@
+GL_GNULIB_WRITE = @GL_GNULIB_WRITE@
+GL_GNULIB__EXIT = @GL_GNULIB__EXIT@
+GMSGFMT = @GMSGFMT@
+GMSGFMT_015 = @GMSGFMT_015@
+GNULIBHEADERS_OVERRIDE_WINT_T = @GNULIBHEADERS_OVERRIDE_WINT_T@
+GNULIB_GETTIMEOFDAY = @GNULIB_GETTIMEOFDAY@
+GNULIB_TEST_WARN_CFLAGS = @GNULIB_TEST_WARN_CFLAGS@
+GNULIB_WARN_CFLAGS = @GNULIB_WARN_CFLAGS@
+GREP = @GREP@
+HAVE_ACCEPT4 = @HAVE_ACCEPT4@
+HAVE_ALIGNED_ALLOC = @HAVE_ALIGNED_ALLOC@
+HAVE_ALLOCA_H = @HAVE_ALLOCA_H@
+HAVE_ALPHASORT = @HAVE_ALPHASORT@
+HAVE_ARPA_INET_H = @HAVE_ARPA_INET_H@
+HAVE_ATOLL = @HAVE_ATOLL@
+HAVE_BTOWC = @HAVE_BTOWC@
+HAVE_C99_STDINT_H = @HAVE_C99_STDINT_H@
+HAVE_CANONICALIZE_FILE_NAME = @HAVE_CANONICALIZE_FILE_NAME@
+HAVE_CHOWN = @HAVE_CHOWN@
+HAVE_CLOSEDIR = @HAVE_CLOSEDIR@
+HAVE_COPY_FILE_RANGE = @HAVE_COPY_FILE_RANGE@
+HAVE_CRTDEFS_H = @HAVE_CRTDEFS_H@
+HAVE_DECL_DIRFD = @HAVE_DECL_DIRFD@
+HAVE_DECL_ECVT = @HAVE_DECL_ECVT@
+HAVE_DECL_ENVIRON = @HAVE_DECL_ENVIRON@
+HAVE_DECL_EXECVPE = @HAVE_DECL_EXECVPE@
+HAVE_DECL_FCHDIR = @HAVE_DECL_FCHDIR@
+HAVE_DECL_FCLOSEALL = @HAVE_DECL_FCLOSEALL@
+HAVE_DECL_FCVT = @HAVE_DECL_FCVT@
+HAVE_DECL_FDATASYNC = @HAVE_DECL_FDATASYNC@
+HAVE_DECL_FDOPENDIR = @HAVE_DECL_FDOPENDIR@
+HAVE_DECL_FPURGE = @HAVE_DECL_FPURGE@
+HAVE_DECL_FSEEKO = @HAVE_DECL_FSEEKO@
+HAVE_DECL_FTELLO = @HAVE_DECL_FTELLO@
+HAVE_DECL_GCVT = @HAVE_DECL_GCVT@
+HAVE_DECL_GETDELIM = @HAVE_DECL_GETDELIM@
+HAVE_DECL_GETDOMAINNAME = @HAVE_DECL_GETDOMAINNAME@
+HAVE_DECL_GETLINE = @HAVE_DECL_GETLINE@
+HAVE_DECL_GETLOADAVG = @HAVE_DECL_GETLOADAVG@
+HAVE_DECL_GETLOGIN = @HAVE_DECL_GETLOGIN@
+HAVE_DECL_GETLOGIN_R = @HAVE_DECL_GETLOGIN_R@
+HAVE_DECL_GETPAGESIZE = @HAVE_DECL_GETPAGESIZE@
+HAVE_DECL_GETUSERSHELL = @HAVE_DECL_GETUSERSHELL@
+HAVE_DECL_IMAXABS = @HAVE_DECL_IMAXABS@
+HAVE_DECL_IMAXDIV = @HAVE_DECL_IMAXDIV@
+HAVE_DECL_INET_NTOP = @HAVE_DECL_INET_NTOP@
+HAVE_DECL_INET_PTON = @HAVE_DECL_INET_PTON@
+HAVE_DECL_INITSTATE = @HAVE_DECL_INITSTATE@
+HAVE_DECL_LOCALTIME_R = @HAVE_DECL_LOCALTIME_R@
+HAVE_DECL_MEMMEM = @HAVE_DECL_MEMMEM@
+HAVE_DECL_MEMRCHR = @HAVE_DECL_MEMRCHR@
+HAVE_DECL_OBSTACK_PRINTF = @HAVE_DECL_OBSTACK_PRINTF@
+HAVE_DECL_SETENV = @HAVE_DECL_SETENV@
+HAVE_DECL_SETHOSTNAME = @HAVE_DECL_SETHOSTNAME@
+HAVE_DECL_SETSTATE = @HAVE_DECL_SETSTATE@
+HAVE_DECL_SNPRINTF = @HAVE_DECL_SNPRINTF@
+HAVE_DECL_STRDUP = @HAVE_DECL_STRDUP@
+HAVE_DECL_STRERROR_R = @HAVE_DECL_STRERROR_R@
+HAVE_DECL_STRNDUP = @HAVE_DECL_STRNDUP@
+HAVE_DECL_STRNLEN = @HAVE_DECL_STRNLEN@
+HAVE_DECL_STRSIGNAL = @HAVE_DECL_STRSIGNAL@
+HAVE_DECL_STRTOIMAX = @HAVE_DECL_STRTOIMAX@
+HAVE_DECL_STRTOK_R = @HAVE_DECL_STRTOK_R@
+HAVE_DECL_STRTOUMAX = @HAVE_DECL_STRTOUMAX@
+HAVE_DECL_TRUNCATE = @HAVE_DECL_TRUNCATE@
+HAVE_DECL_TTYNAME_R = @HAVE_DECL_TTYNAME_R@
+HAVE_DECL_UNSETENV = @HAVE_DECL_UNSETENV@
+HAVE_DECL_VSNPRINTF = @HAVE_DECL_VSNPRINTF@
+HAVE_DECL_WCSDUP = @HAVE_DECL_WCSDUP@
+HAVE_DECL_WCTOB = @HAVE_DECL_WCTOB@
+HAVE_DECL_WCWIDTH = @HAVE_DECL_WCWIDTH@
+HAVE_DIRENT_H = @HAVE_DIRENT_H@
+HAVE_DPRINTF = @HAVE_DPRINTF@
+HAVE_DUP3 = @HAVE_DUP3@
+HAVE_DUPLOCALE = @HAVE_DUPLOCALE@
+HAVE_EUIDACCESS = @HAVE_EUIDACCESS@
+HAVE_EXECVPE = @HAVE_EXECVPE@
+HAVE_EXPLICIT_BZERO = @HAVE_EXPLICIT_BZERO@
+HAVE_FACCESSAT = @HAVE_FACCESSAT@
+HAVE_FCHDIR = @HAVE_FCHDIR@
+HAVE_FCHMODAT = @HAVE_FCHMODAT@
+HAVE_FCHOWNAT = @HAVE_FCHOWNAT@
+HAVE_FCNTL = @HAVE_FCNTL@
+HAVE_FDATASYNC = @HAVE_FDATASYNC@
+HAVE_FDOPENDIR = @HAVE_FDOPENDIR@
+HAVE_FEATURES_H = @HAVE_FEATURES_H@
+HAVE_FFSL = @HAVE_FFSL@
+HAVE_FFSLL = @HAVE_FFSLL@
+HAVE_FNMATCH = @HAVE_FNMATCH@
+HAVE_FNMATCH_H = @HAVE_FNMATCH_H@
+HAVE_FREELOCALE = @HAVE_FREELOCALE@
+HAVE_FSEEKO = @HAVE_FSEEKO@
+HAVE_FSTATAT = @HAVE_FSTATAT@
+HAVE_FSYNC = @HAVE_FSYNC@
+HAVE_FTELLO = @HAVE_FTELLO@
+HAVE_FTRUNCATE = @HAVE_FTRUNCATE@
+HAVE_FUTIMENS = @HAVE_FUTIMENS@
+HAVE_GETDTABLESIZE = @HAVE_GETDTABLESIZE@
+HAVE_GETENTROPY = @HAVE_GETENTROPY@
+HAVE_GETGROUPS = @HAVE_GETGROUPS@
+HAVE_GETHOSTNAME = @HAVE_GETHOSTNAME@
+HAVE_GETLOGIN = @HAVE_GETLOGIN@
+HAVE_GETOPT_H = @HAVE_GETOPT_H@
+HAVE_GETPAGESIZE = @HAVE_GETPAGESIZE@
+HAVE_GETPASS = @HAVE_GETPASS@
+HAVE_GETSUBOPT = @HAVE_GETSUBOPT@
+HAVE_GETTIMEOFDAY = @HAVE_GETTIMEOFDAY@
+HAVE_GETUMASK = @HAVE_GETUMASK@
+HAVE_GRANTPT = @HAVE_GRANTPT@
+HAVE_GROUP_MEMBER = @HAVE_GROUP_MEMBER@
+HAVE_IMAXDIV_T = @HAVE_IMAXDIV_T@
+HAVE_INITSTATE = @HAVE_INITSTATE@
+HAVE_INTTYPES_H = @HAVE_INTTYPES_H@
+HAVE_ISBLANK = @HAVE_ISBLANK@
+HAVE_ISWBLANK = @HAVE_ISWBLANK@
+HAVE_ISWCNTRL = @HAVE_ISWCNTRL@
+HAVE_LANGINFO_ALTMON = @HAVE_LANGINFO_ALTMON@
+HAVE_LANGINFO_CODESET = @HAVE_LANGINFO_CODESET@
+HAVE_LANGINFO_ERA = @HAVE_LANGINFO_ERA@
+HAVE_LANGINFO_H = @HAVE_LANGINFO_H@
+HAVE_LANGINFO_T_FMT_AMPM = @HAVE_LANGINFO_T_FMT_AMPM@
+HAVE_LANGINFO_YESEXPR = @HAVE_LANGINFO_YESEXPR@
+HAVE_LCHMOD = @HAVE_LCHMOD@
+HAVE_LCHOWN = @HAVE_LCHOWN@
+HAVE_LIBSIGSEGV = @HAVE_LIBSIGSEGV@
+HAVE_LINK = @HAVE_LINK@
+HAVE_LINKAT = @HAVE_LINKAT@
+HAVE_LSTAT = @HAVE_LSTAT@
+HAVE_MAX_ALIGN_T = @HAVE_MAX_ALIGN_T@
+HAVE_MBRLEN = @HAVE_MBRLEN@
+HAVE_MBRTOWC = @HAVE_MBRTOWC@
+HAVE_MBSINIT = @HAVE_MBSINIT@
+HAVE_MBSLEN = @HAVE_MBSLEN@
+HAVE_MBSNRTOWCS = @HAVE_MBSNRTOWCS@
+HAVE_MBSRTOWCS = @HAVE_MBSRTOWCS@
+HAVE_MBTOWC = @HAVE_MBTOWC@
+HAVE_MEMPCPY = @HAVE_MEMPCPY@
+HAVE_MKDIRAT = @HAVE_MKDIRAT@
+HAVE_MKDTEMP = @HAVE_MKDTEMP@
+HAVE_MKFIFO = @HAVE_MKFIFO@
+HAVE_MKFIFOAT = @HAVE_MKFIFOAT@
+HAVE_MKNOD = @HAVE_MKNOD@
+HAVE_MKNODAT = @HAVE_MKNODAT@
+HAVE_MKOSTEMP = @HAVE_MKOSTEMP@
+HAVE_MKOSTEMPS = @HAVE_MKOSTEMPS@
+HAVE_MKSTEMP = @HAVE_MKSTEMP@
+HAVE_MKSTEMPS = @HAVE_MKSTEMPS@
+HAVE_MSVC_INVALID_PARAMETER_HANDLER = @HAVE_MSVC_INVALID_PARAMETER_HANDLER@
+HAVE_NANOSLEEP = @HAVE_NANOSLEEP@
+HAVE_NETINET_IN_H = @HAVE_NETINET_IN_H@
+HAVE_NEWLOCALE = @HAVE_NEWLOCALE@
+HAVE_NL_LANGINFO = @HAVE_NL_LANGINFO@
+HAVE_OPENAT = @HAVE_OPENAT@
+HAVE_OPENDIR = @HAVE_OPENDIR@
+HAVE_OS_H = @HAVE_OS_H@
+HAVE_PCLOSE = @HAVE_PCLOSE@
+HAVE_PIPE = @HAVE_PIPE@
+HAVE_PIPE2 = @HAVE_PIPE2@
+HAVE_POPEN = @HAVE_POPEN@
+HAVE_POSIX_MEMALIGN = @HAVE_POSIX_MEMALIGN@
+HAVE_POSIX_OPENPT = @HAVE_POSIX_OPENPT@
+HAVE_POSIX_SIGNALBLOCKING = @HAVE_POSIX_SIGNALBLOCKING@
+HAVE_PREAD = @HAVE_PREAD@
+HAVE_PSELECT = @HAVE_PSELECT@
+HAVE_PTHREAD_ATTR_DESTROY = @HAVE_PTHREAD_ATTR_DESTROY@
+HAVE_PTHREAD_ATTR_GETDETACHSTATE = @HAVE_PTHREAD_ATTR_GETDETACHSTATE@
+HAVE_PTHREAD_ATTR_INIT = @HAVE_PTHREAD_ATTR_INIT@
+HAVE_PTHREAD_ATTR_SETDETACHSTATE = @HAVE_PTHREAD_ATTR_SETDETACHSTATE@
+HAVE_PTHREAD_CONDATTR_DESTROY = @HAVE_PTHREAD_CONDATTR_DESTROY@
+HAVE_PTHREAD_CONDATTR_INIT = @HAVE_PTHREAD_CONDATTR_INIT@
+HAVE_PTHREAD_COND_BROADCAST = @HAVE_PTHREAD_COND_BROADCAST@
+HAVE_PTHREAD_COND_DESTROY = @HAVE_PTHREAD_COND_DESTROY@
+HAVE_PTHREAD_COND_INIT = @HAVE_PTHREAD_COND_INIT@
+HAVE_PTHREAD_COND_SIGNAL = @HAVE_PTHREAD_COND_SIGNAL@
+HAVE_PTHREAD_COND_TIMEDWAIT = @HAVE_PTHREAD_COND_TIMEDWAIT@
+HAVE_PTHREAD_COND_WAIT = @HAVE_PTHREAD_COND_WAIT@
+HAVE_PTHREAD_CREATE = @HAVE_PTHREAD_CREATE@
+HAVE_PTHREAD_CREATE_DETACHED = @HAVE_PTHREAD_CREATE_DETACHED@
+HAVE_PTHREAD_DETACH = @HAVE_PTHREAD_DETACH@
+HAVE_PTHREAD_EQUAL = @HAVE_PTHREAD_EQUAL@
+HAVE_PTHREAD_EXIT = @HAVE_PTHREAD_EXIT@
+HAVE_PTHREAD_GETSPECIFIC = @HAVE_PTHREAD_GETSPECIFIC@
+HAVE_PTHREAD_H = @HAVE_PTHREAD_H@
+HAVE_PTHREAD_JOIN = @HAVE_PTHREAD_JOIN@
+HAVE_PTHREAD_KEY_CREATE = @HAVE_PTHREAD_KEY_CREATE@
+HAVE_PTHREAD_KEY_DELETE = @HAVE_PTHREAD_KEY_DELETE@
+HAVE_PTHREAD_MUTEXATTR_DESTROY = @HAVE_PTHREAD_MUTEXATTR_DESTROY@
+HAVE_PTHREAD_MUTEXATTR_GETROBUST = @HAVE_PTHREAD_MUTEXATTR_GETROBUST@
+HAVE_PTHREAD_MUTEXATTR_GETTYPE = @HAVE_PTHREAD_MUTEXATTR_GETTYPE@
+HAVE_PTHREAD_MUTEXATTR_INIT = @HAVE_PTHREAD_MUTEXATTR_INIT@
+HAVE_PTHREAD_MUTEXATTR_SETROBUST = @HAVE_PTHREAD_MUTEXATTR_SETROBUST@
+HAVE_PTHREAD_MUTEXATTR_SETTYPE = @HAVE_PTHREAD_MUTEXATTR_SETTYPE@
+HAVE_PTHREAD_MUTEX_DESTROY = @HAVE_PTHREAD_MUTEX_DESTROY@
+HAVE_PTHREAD_MUTEX_INIT = @HAVE_PTHREAD_MUTEX_INIT@
+HAVE_PTHREAD_MUTEX_LOCK = @HAVE_PTHREAD_MUTEX_LOCK@
+HAVE_PTHREAD_MUTEX_RECURSIVE = @HAVE_PTHREAD_MUTEX_RECURSIVE@
+HAVE_PTHREAD_MUTEX_ROBUST = @HAVE_PTHREAD_MUTEX_ROBUST@
+HAVE_PTHREAD_MUTEX_TIMEDLOCK = @HAVE_PTHREAD_MUTEX_TIMEDLOCK@
+HAVE_PTHREAD_MUTEX_TRYLOCK = @HAVE_PTHREAD_MUTEX_TRYLOCK@
+HAVE_PTHREAD_MUTEX_UNLOCK = @HAVE_PTHREAD_MUTEX_UNLOCK@
+HAVE_PTHREAD_ONCE = @HAVE_PTHREAD_ONCE@
+HAVE_PTHREAD_PROCESS_SHARED = @HAVE_PTHREAD_PROCESS_SHARED@
+HAVE_PTHREAD_RWLOCKATTR_DESTROY = @HAVE_PTHREAD_RWLOCKATTR_DESTROY@
+HAVE_PTHREAD_RWLOCKATTR_INIT = @HAVE_PTHREAD_RWLOCKATTR_INIT@
+HAVE_PTHREAD_RWLOCK_DESTROY = @HAVE_PTHREAD_RWLOCK_DESTROY@
+HAVE_PTHREAD_RWLOCK_INIT = @HAVE_PTHREAD_RWLOCK_INIT@
+HAVE_PTHREAD_RWLOCK_RDLOCK = @HAVE_PTHREAD_RWLOCK_RDLOCK@
+HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK = @HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK@
+HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK = @HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK@
+HAVE_PTHREAD_RWLOCK_TRYRDLOCK = @HAVE_PTHREAD_RWLOCK_TRYRDLOCK@
+HAVE_PTHREAD_RWLOCK_TRYWRLOCK = @HAVE_PTHREAD_RWLOCK_TRYWRLOCK@
+HAVE_PTHREAD_RWLOCK_UNLOCK = @HAVE_PTHREAD_RWLOCK_UNLOCK@
+HAVE_PTHREAD_RWLOCK_WRLOCK = @HAVE_PTHREAD_RWLOCK_WRLOCK@
+HAVE_PTHREAD_SELF = @HAVE_PTHREAD_SELF@
+HAVE_PTHREAD_SETSPECIFIC = @HAVE_PTHREAD_SETSPECIFIC@
+HAVE_PTHREAD_SIGMASK = @HAVE_PTHREAD_SIGMASK@
+HAVE_PTHREAD_SPINLOCK_T = @HAVE_PTHREAD_SPINLOCK_T@
+HAVE_PTHREAD_SPIN_DESTROY = @HAVE_PTHREAD_SPIN_DESTROY@
+HAVE_PTHREAD_SPIN_INIT = @HAVE_PTHREAD_SPIN_INIT@
+HAVE_PTHREAD_SPIN_LOCK = @HAVE_PTHREAD_SPIN_LOCK@
+HAVE_PTHREAD_SPIN_TRYLOCK = @HAVE_PTHREAD_SPIN_TRYLOCK@
+HAVE_PTHREAD_SPIN_UNLOCK = @HAVE_PTHREAD_SPIN_UNLOCK@
+HAVE_PTHREAD_T = @HAVE_PTHREAD_T@
+HAVE_PTSNAME = @HAVE_PTSNAME@
+HAVE_PTSNAME_R = @HAVE_PTSNAME_R@
+HAVE_PWRITE = @HAVE_PWRITE@
+HAVE_QSORT_R = @HAVE_QSORT_R@
+HAVE_RAISE = @HAVE_RAISE@
+HAVE_RANDOM = @HAVE_RANDOM@
+HAVE_RANDOM_H = @HAVE_RANDOM_H@
+HAVE_RANDOM_R = @HAVE_RANDOM_R@
+HAVE_RAWMEMCHR = @HAVE_RAWMEMCHR@
+HAVE_READDIR = @HAVE_READDIR@
+HAVE_READLINK = @HAVE_READLINK@
+HAVE_READLINKAT = @HAVE_READLINKAT@
+HAVE_REALLOCARRAY = @HAVE_REALLOCARRAY@
+HAVE_REALPATH = @HAVE_REALPATH@
+HAVE_RENAMEAT = @HAVE_RENAMEAT@
+HAVE_REWINDDIR = @HAVE_REWINDDIR@
+HAVE_RPMATCH = @HAVE_RPMATCH@
+HAVE_SA_FAMILY_T = @HAVE_SA_FAMILY_T@
+HAVE_SCANDIR = @HAVE_SCANDIR@
+HAVE_SCHED_H = @HAVE_SCHED_H@
+HAVE_SCHED_YIELD = @HAVE_SCHED_YIELD@
+HAVE_SECURE_GETENV = @HAVE_SECURE_GETENV@
+HAVE_SETENV = @HAVE_SETENV@
+HAVE_SETHOSTNAME = @HAVE_SETHOSTNAME@
+HAVE_SETSTATE = @HAVE_SETSTATE@
+HAVE_SIGABBREV_NP = @HAVE_SIGABBREV_NP@
+HAVE_SIGACTION = @HAVE_SIGACTION@
+HAVE_SIGDESCR_NP = @HAVE_SIGDESCR_NP@
+HAVE_SIGHANDLER_T = @HAVE_SIGHANDLER_T@
+HAVE_SIGINFO_T = @HAVE_SIGINFO_T@
+HAVE_SIGNED_SIG_ATOMIC_T = @HAVE_SIGNED_SIG_ATOMIC_T@
+HAVE_SIGNED_WCHAR_T = @HAVE_SIGNED_WCHAR_T@
+HAVE_SIGNED_WINT_T = @HAVE_SIGNED_WINT_T@
+HAVE_SIGSET_T = @HAVE_SIGSET_T@
+HAVE_SLEEP = @HAVE_SLEEP@
+HAVE_STDINT_H = @HAVE_STDINT_H@
+HAVE_STPCPY = @HAVE_STPCPY@
+HAVE_STPNCPY = @HAVE_STPNCPY@
+HAVE_STRCASESTR = @HAVE_STRCASESTR@
+HAVE_STRCHRNUL = @HAVE_STRCHRNUL@
+HAVE_STRERRORNAME_NP = @HAVE_STRERRORNAME_NP@
+HAVE_STRPBRK = @HAVE_STRPBRK@
+HAVE_STRPTIME = @HAVE_STRPTIME@
+HAVE_STRSEP = @HAVE_STRSEP@
+HAVE_STRTOD = @HAVE_STRTOD@
+HAVE_STRTOL = @HAVE_STRTOL@
+HAVE_STRTOLD = @HAVE_STRTOLD@
+HAVE_STRTOLL = @HAVE_STRTOLL@
+HAVE_STRTOUL = @HAVE_STRTOUL@
+HAVE_STRTOULL = @HAVE_STRTOULL@
+HAVE_STRUCT_RANDOM_DATA = @HAVE_STRUCT_RANDOM_DATA@
+HAVE_STRUCT_SCHED_PARAM = @HAVE_STRUCT_SCHED_PARAM@
+HAVE_STRUCT_SIGACTION_SA_SIGACTION = @HAVE_STRUCT_SIGACTION_SA_SIGACTION@
+HAVE_STRUCT_SOCKADDR_STORAGE = @HAVE_STRUCT_SOCKADDR_STORAGE@
+HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY = @HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY@
+HAVE_STRUCT_TIMEVAL = @HAVE_STRUCT_TIMEVAL@
+HAVE_STRVERSCMP = @HAVE_STRVERSCMP@
+HAVE_SYMLINK = @HAVE_SYMLINK@
+HAVE_SYMLINKAT = @HAVE_SYMLINKAT@
+HAVE_SYS_BITYPES_H = @HAVE_SYS_BITYPES_H@
+HAVE_SYS_CDEFS_H = @HAVE_SYS_CDEFS_H@
+HAVE_SYS_INTTYPES_H = @HAVE_SYS_INTTYPES_H@
+HAVE_SYS_IOCTL_H = @HAVE_SYS_IOCTL_H@
+HAVE_SYS_LOADAVG_H = @HAVE_SYS_LOADAVG_H@
+HAVE_SYS_PARAM_H = @HAVE_SYS_PARAM_H@
+HAVE_SYS_SELECT_H = @HAVE_SYS_SELECT_H@
+HAVE_SYS_SOCKET_H = @HAVE_SYS_SOCKET_H@
+HAVE_SYS_TIME_H = @HAVE_SYS_TIME_H@
+HAVE_SYS_TYPES_H = @HAVE_SYS_TYPES_H@
+HAVE_SYS_UIO_H = @HAVE_SYS_UIO_H@
+HAVE_TIMEGM = @HAVE_TIMEGM@
+HAVE_TIMESPEC_GET = @HAVE_TIMESPEC_GET@
+HAVE_TIMEZONE_T = @HAVE_TIMEZONE_T@
+HAVE_TYPE_VOLATILE_SIG_ATOMIC_T = @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
+HAVE_UNISTD_H = @HAVE_UNISTD_H@
+HAVE_UNLINKAT = @HAVE_UNLINKAT@
+HAVE_UNLOCKPT = @HAVE_UNLOCKPT@
+HAVE_USLEEP = @HAVE_USLEEP@
+HAVE_UTIMENSAT = @HAVE_UTIMENSAT@
+HAVE_VASPRINTF = @HAVE_VASPRINTF@
+HAVE_VDPRINTF = @HAVE_VDPRINTF@
+HAVE_VISIBILITY = @HAVE_VISIBILITY@
+HAVE_WCHAR_H = @HAVE_WCHAR_H@
+HAVE_WCHAR_T = @HAVE_WCHAR_T@
+HAVE_WCPCPY = @HAVE_WCPCPY@
+HAVE_WCPNCPY = @HAVE_WCPNCPY@
+HAVE_WCRTOMB = @HAVE_WCRTOMB@
+HAVE_WCSCASECMP = @HAVE_WCSCASECMP@
+HAVE_WCSCAT = @HAVE_WCSCAT@
+HAVE_WCSCHR = @HAVE_WCSCHR@
+HAVE_WCSCMP = @HAVE_WCSCMP@
+HAVE_WCSCOLL = @HAVE_WCSCOLL@
+HAVE_WCSCPY = @HAVE_WCSCPY@
+HAVE_WCSCSPN = @HAVE_WCSCSPN@
+HAVE_WCSDUP = @HAVE_WCSDUP@
+HAVE_WCSFTIME = @HAVE_WCSFTIME@
+HAVE_WCSLEN = @HAVE_WCSLEN@
+HAVE_WCSNCASECMP = @HAVE_WCSNCASECMP@
+HAVE_WCSNCAT = @HAVE_WCSNCAT@
+HAVE_WCSNCMP = @HAVE_WCSNCMP@
+HAVE_WCSNCPY = @HAVE_WCSNCPY@
+HAVE_WCSNLEN = @HAVE_WCSNLEN@
+HAVE_WCSNRTOMBS = @HAVE_WCSNRTOMBS@
+HAVE_WCSPBRK = @HAVE_WCSPBRK@
+HAVE_WCSRCHR = @HAVE_WCSRCHR@
+HAVE_WCSRTOMBS = @HAVE_WCSRTOMBS@
+HAVE_WCSSPN = @HAVE_WCSSPN@
+HAVE_WCSSTR = @HAVE_WCSSTR@
+HAVE_WCSTOK = @HAVE_WCSTOK@
+HAVE_WCSWIDTH = @HAVE_WCSWIDTH@
+HAVE_WCSXFRM = @HAVE_WCSXFRM@
+HAVE_WCTRANS_T = @HAVE_WCTRANS_T@
+HAVE_WCTYPE_H = @HAVE_WCTYPE_H@
+HAVE_WCTYPE_T = @HAVE_WCTYPE_T@
+HAVE_WINSOCK2_H = @HAVE_WINSOCK2_H@
+HAVE_WINT_T = @HAVE_WINT_T@
+HAVE_WMEMCHR = @HAVE_WMEMCHR@
+HAVE_WMEMCMP = @HAVE_WMEMCMP@
+HAVE_WMEMCPY = @HAVE_WMEMCPY@
+HAVE_WMEMMOVE = @HAVE_WMEMMOVE@
+HAVE_WMEMPCPY = @HAVE_WMEMPCPY@
+HAVE_WMEMSET = @HAVE_WMEMSET@
+HAVE_WS2TCPIP_H = @HAVE_WS2TCPIP_H@
+HAVE_XLOCALE_H = @HAVE_XLOCALE_H@
+HAVE__BOOL = @HAVE__BOOL@
+HAVE__EXIT = @HAVE__EXIT@
+HOST_CPU = @HOST_CPU@
+HOST_CPU_C_ABI = @HOST_CPU_C_ABI@
+ICONV_CONST = @ICONV_CONST@
+ICONV_H = @ICONV_H@
+INCLUDE_NEXT = @INCLUDE_NEXT@
+INCLUDE_NEXT_AS_FIRST_DIRECTIVE = @INCLUDE_NEXT_AS_FIRST_DIRECTIVE@
+INET_PTON_LIB = @INET_PTON_LIB@
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+INT32_MAX_LT_INTMAX_MAX = @INT32_MAX_LT_INTMAX_MAX@
+INT64_MAX_EQ_LONG_MAX = @INT64_MAX_EQ_LONG_MAX@
+INTLLIBS = @INTLLIBS@
+INTL_MACOSX_LIBS = @INTL_MACOSX_LIBS@
+LDFLAGS = @LDFLAGS@
+LIBCSTACK = @LIBCSTACK@
+LIBGREPUTILS_LIBDEPS = @LIBGREPUTILS_LIBDEPS@
+LIBGREPUTILS_LTLIBDEPS = @LIBGREPUTILS_LTLIBDEPS@
+LIBICONV = @LIBICONV@
+LIBINTL = @LIBINTL@
+LIBMULTITHREAD = @LIBMULTITHREAD@
+LIBOBJS = @LIBOBJS@
+LIBPMULTITHREAD = @LIBPMULTITHREAD@
+LIBPTHREAD = @LIBPTHREAD@
+LIBS = @LIBS@
+LIBSIGSEGV = @LIBSIGSEGV@
+LIBSIGSEGV_PREFIX = @LIBSIGSEGV_PREFIX@
+LIBSOCKET = @LIBSOCKET@
+LIBSTDTHREAD = @LIBSTDTHREAD@
+LIBTESTS_LIBDEPS = @LIBTESTS_LIBDEPS@
+LIBTHREAD = @LIBTHREAD@
+LIBUNISTRING_UNISTR_H = @LIBUNISTRING_UNISTR_H@
+LIBUNISTRING_UNITYPES_H = @LIBUNISTRING_UNITYPES_H@
+LIBUNISTRING_UNIWIDTH_H = @LIBUNISTRING_UNIWIDTH_H@
+LIB_HARD_LOCALE = @LIB_HARD_LOCALE@
+LIB_MBRTOWC = @LIB_MBRTOWC@
+LIB_NANOSLEEP = @LIB_NANOSLEEP@
+LIB_NL_LANGINFO = @LIB_NL_LANGINFO@
+LIB_PTHREAD = @LIB_PTHREAD@
+LIB_PTHREAD_SIGMASK = @LIB_PTHREAD_SIGMASK@
+LIB_SCHED_YIELD = @LIB_SCHED_YIELD@
+LIB_SELECT = @LIB_SELECT@
+LIB_SETLOCALE = @LIB_SETLOCALE@
+LIB_SETLOCALE_NULL = @LIB_SETLOCALE_NULL@
+LIMITS_H = @LIMITS_H@
+LOCALCHARSET_TESTS_ENVIRONMENT = @LOCALCHARSET_TESTS_ENVIRONMENT@
+LOCALENAME_ENHANCE_LOCALE_FUNCS = @LOCALENAME_ENHANCE_LOCALE_FUNCS@
+LOCALE_FR = @LOCALE_FR@
+LOCALE_FR_UTF8 = @LOCALE_FR_UTF8@
+LOCALE_JA = @LOCALE_JA@
+LOCALE_TR_UTF8 = @LOCALE_TR_UTF8@
+LOCALE_ZH_CN = @LOCALE_ZH_CN@
+LTLIBCSTACK = @LTLIBCSTACK@
+LTLIBICONV = @LTLIBICONV@
+LTLIBINTL = @LTLIBINTL@
+LTLIBMULTITHREAD = @LTLIBMULTITHREAD@
+LTLIBOBJS = @LTLIBOBJS@
+LTLIBSIGSEGV = @LTLIBSIGSEGV@
+LTLIBTHREAD = @LTLIBTHREAD@
+MAKEINFO = @MAKEINFO@
+MKDIR_P = @MKDIR_P@
+MSGFMT = @MSGFMT@
+MSGFMT_015 = @MSGFMT_015@
+MSGMERGE = @MSGMERGE@
+NETINET_IN_H = @NETINET_IN_H@
+NEXT_ARPA_INET_H = @NEXT_ARPA_INET_H@
+NEXT_AS_FIRST_DIRECTIVE_ARPA_INET_H = @NEXT_AS_FIRST_DIRECTIVE_ARPA_INET_H@
+NEXT_AS_FIRST_DIRECTIVE_CTYPE_H = @NEXT_AS_FIRST_DIRECTIVE_CTYPE_H@
+NEXT_AS_FIRST_DIRECTIVE_DIRENT_H = @NEXT_AS_FIRST_DIRECTIVE_DIRENT_H@
+NEXT_AS_FIRST_DIRECTIVE_ERRNO_H = @NEXT_AS_FIRST_DIRECTIVE_ERRNO_H@
+NEXT_AS_FIRST_DIRECTIVE_FCNTL_H = @NEXT_AS_FIRST_DIRECTIVE_FCNTL_H@
+NEXT_AS_FIRST_DIRECTIVE_FLOAT_H = @NEXT_AS_FIRST_DIRECTIVE_FLOAT_H@
+NEXT_AS_FIRST_DIRECTIVE_FNMATCH_H = @NEXT_AS_FIRST_DIRECTIVE_FNMATCH_H@
+NEXT_AS_FIRST_DIRECTIVE_GETOPT_H = @NEXT_AS_FIRST_DIRECTIVE_GETOPT_H@
+NEXT_AS_FIRST_DIRECTIVE_ICONV_H = @NEXT_AS_FIRST_DIRECTIVE_ICONV_H@
+NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H = @NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H@
+NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H = @NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H@
+NEXT_AS_FIRST_DIRECTIVE_LIMITS_H = @NEXT_AS_FIRST_DIRECTIVE_LIMITS_H@
+NEXT_AS_FIRST_DIRECTIVE_LOCALE_H = @NEXT_AS_FIRST_DIRECTIVE_LOCALE_H@
+NEXT_AS_FIRST_DIRECTIVE_NETINET_IN_H = @NEXT_AS_FIRST_DIRECTIVE_NETINET_IN_H@
+NEXT_AS_FIRST_DIRECTIVE_PTHREAD_H = @NEXT_AS_FIRST_DIRECTIVE_PTHREAD_H@
+NEXT_AS_FIRST_DIRECTIVE_SCHED_H = @NEXT_AS_FIRST_DIRECTIVE_SCHED_H@
+NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H = @NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H@
+NEXT_AS_FIRST_DIRECTIVE_STDARG_H = @NEXT_AS_FIRST_DIRECTIVE_STDARG_H@
+NEXT_AS_FIRST_DIRECTIVE_STDDEF_H = @NEXT_AS_FIRST_DIRECTIVE_STDDEF_H@
+NEXT_AS_FIRST_DIRECTIVE_STDINT_H = @NEXT_AS_FIRST_DIRECTIVE_STDINT_H@
+NEXT_AS_FIRST_DIRECTIVE_STDIO_H = @NEXT_AS_FIRST_DIRECTIVE_STDIO_H@
+NEXT_AS_FIRST_DIRECTIVE_STDLIB_H = @NEXT_AS_FIRST_DIRECTIVE_STDLIB_H@
+NEXT_AS_FIRST_DIRECTIVE_STRING_H = @NEXT_AS_FIRST_DIRECTIVE_STRING_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H@
+NEXT_AS_FIRST_DIRECTIVE_TIME_H = @NEXT_AS_FIRST_DIRECTIVE_TIME_H@
+NEXT_AS_FIRST_DIRECTIVE_UNISTD_H = @NEXT_AS_FIRST_DIRECTIVE_UNISTD_H@
+NEXT_AS_FIRST_DIRECTIVE_WCHAR_H = @NEXT_AS_FIRST_DIRECTIVE_WCHAR_H@
+NEXT_AS_FIRST_DIRECTIVE_WCTYPE_H = @NEXT_AS_FIRST_DIRECTIVE_WCTYPE_H@
+NEXT_CTYPE_H = @NEXT_CTYPE_H@
+NEXT_DIRENT_H = @NEXT_DIRENT_H@
+NEXT_ERRNO_H = @NEXT_ERRNO_H@
+NEXT_FCNTL_H = @NEXT_FCNTL_H@
+NEXT_FLOAT_H = @NEXT_FLOAT_H@
+NEXT_FNMATCH_H = @NEXT_FNMATCH_H@
+NEXT_GETOPT_H = @NEXT_GETOPT_H@
+NEXT_ICONV_H = @NEXT_ICONV_H@
+NEXT_INTTYPES_H = @NEXT_INTTYPES_H@
+NEXT_LANGINFO_H = @NEXT_LANGINFO_H@
+NEXT_LIMITS_H = @NEXT_LIMITS_H@
+NEXT_LOCALE_H = @NEXT_LOCALE_H@
+NEXT_NETINET_IN_H = @NEXT_NETINET_IN_H@
+NEXT_PTHREAD_H = @NEXT_PTHREAD_H@
+NEXT_SCHED_H = @NEXT_SCHED_H@
+NEXT_SIGNAL_H = @NEXT_SIGNAL_H@
+NEXT_STDARG_H = @NEXT_STDARG_H@
+NEXT_STDDEF_H = @NEXT_STDDEF_H@
+NEXT_STDINT_H = @NEXT_STDINT_H@
+NEXT_STDIO_H = @NEXT_STDIO_H@
+NEXT_STDLIB_H = @NEXT_STDLIB_H@
+NEXT_STRING_H = @NEXT_STRING_H@
+NEXT_SYS_IOCTL_H = @NEXT_SYS_IOCTL_H@
+NEXT_SYS_SELECT_H = @NEXT_SYS_SELECT_H@
+NEXT_SYS_SOCKET_H = @NEXT_SYS_SOCKET_H@
+NEXT_SYS_STAT_H = @NEXT_SYS_STAT_H@
+NEXT_SYS_TIME_H = @NEXT_SYS_TIME_H@
+NEXT_SYS_TYPES_H = @NEXT_SYS_TYPES_H@
+NEXT_SYS_UIO_H = @NEXT_SYS_UIO_H@
+NEXT_TIME_H = @NEXT_TIME_H@
+NEXT_UNISTD_H = @NEXT_UNISTD_H@
+NEXT_WCHAR_H = @NEXT_WCHAR_H@
+NEXT_WCTYPE_H = @NEXT_WCTYPE_H@
+OBJEXT = @OBJEXT@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_STRING = @PACKAGE_STRING@
+PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+PCRE_CFLAGS = @PCRE_CFLAGS@
+PCRE_LIBS = @PCRE_LIBS@
+PERL = @PERL@
+PKG_CONFIG = @PKG_CONFIG@
+PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@
+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
+POSUB = @POSUB@
+PRAGMA_COLUMNS = @PRAGMA_COLUMNS@
+PRAGMA_SYSTEM_HEADER = @PRAGMA_SYSTEM_HEADER@
+PRIPTR_PREFIX = @PRIPTR_PREFIX@
+PTHREAD_H_DEFINES_STRUCT_TIMESPEC = @PTHREAD_H_DEFINES_STRUCT_TIMESPEC@
+PTRDIFF_T_SUFFIX = @PTRDIFF_T_SUFFIX@
+RANLIB = @RANLIB@
+REPLACE_ACCESS = @REPLACE_ACCESS@
+REPLACE_ALIGNED_ALLOC = @REPLACE_ALIGNED_ALLOC@
+REPLACE_BTOWC = @REPLACE_BTOWC@
+REPLACE_CALLOC = @REPLACE_CALLOC@
+REPLACE_CANONICALIZE_FILE_NAME = @REPLACE_CANONICALIZE_FILE_NAME@
+REPLACE_CHOWN = @REPLACE_CHOWN@
+REPLACE_CLOSE = @REPLACE_CLOSE@
+REPLACE_CLOSEDIR = @REPLACE_CLOSEDIR@
+REPLACE_CREAT = @REPLACE_CREAT@
+REPLACE_CTIME = @REPLACE_CTIME@
+REPLACE_DIRFD = @REPLACE_DIRFD@
+REPLACE_DPRINTF = @REPLACE_DPRINTF@
+REPLACE_DUP = @REPLACE_DUP@
+REPLACE_DUP2 = @REPLACE_DUP2@
+REPLACE_DUPLOCALE = @REPLACE_DUPLOCALE@
+REPLACE_EXECL = @REPLACE_EXECL@
+REPLACE_EXECLE = @REPLACE_EXECLE@
+REPLACE_EXECLP = @REPLACE_EXECLP@
+REPLACE_EXECV = @REPLACE_EXECV@
+REPLACE_EXECVE = @REPLACE_EXECVE@
+REPLACE_EXECVP = @REPLACE_EXECVP@
+REPLACE_EXECVPE = @REPLACE_EXECVPE@
+REPLACE_FACCESSAT = @REPLACE_FACCESSAT@
+REPLACE_FCHMODAT = @REPLACE_FCHMODAT@
+REPLACE_FCHOWNAT = @REPLACE_FCHOWNAT@
+REPLACE_FCLOSE = @REPLACE_FCLOSE@
+REPLACE_FCNTL = @REPLACE_FCNTL@
+REPLACE_FDOPEN = @REPLACE_FDOPEN@
+REPLACE_FDOPENDIR = @REPLACE_FDOPENDIR@
+REPLACE_FFLUSH = @REPLACE_FFLUSH@
+REPLACE_FFSLL = @REPLACE_FFSLL@
+REPLACE_FNMATCH = @REPLACE_FNMATCH@
+REPLACE_FOPEN = @REPLACE_FOPEN@
+REPLACE_FPRINTF = @REPLACE_FPRINTF@
+REPLACE_FPURGE = @REPLACE_FPURGE@
+REPLACE_FREE = @REPLACE_FREE@
+REPLACE_FREELOCALE = @REPLACE_FREELOCALE@
+REPLACE_FREOPEN = @REPLACE_FREOPEN@
+REPLACE_FSEEK = @REPLACE_FSEEK@
+REPLACE_FSEEKO = @REPLACE_FSEEKO@
+REPLACE_FSTAT = @REPLACE_FSTAT@
+REPLACE_FSTATAT = @REPLACE_FSTATAT@
+REPLACE_FTELL = @REPLACE_FTELL@
+REPLACE_FTELLO = @REPLACE_FTELLO@
+REPLACE_FTRUNCATE = @REPLACE_FTRUNCATE@
+REPLACE_FUTIMENS = @REPLACE_FUTIMENS@
+REPLACE_GETCWD = @REPLACE_GETCWD@
+REPLACE_GETDELIM = @REPLACE_GETDELIM@
+REPLACE_GETDOMAINNAME = @REPLACE_GETDOMAINNAME@
+REPLACE_GETDTABLESIZE = @REPLACE_GETDTABLESIZE@
+REPLACE_GETGROUPS = @REPLACE_GETGROUPS@
+REPLACE_GETLINE = @REPLACE_GETLINE@
+REPLACE_GETLOGIN_R = @REPLACE_GETLOGIN_R@
+REPLACE_GETPAGESIZE = @REPLACE_GETPAGESIZE@
+REPLACE_GETPASS = @REPLACE_GETPASS@
+REPLACE_GETTIMEOFDAY = @REPLACE_GETTIMEOFDAY@
+REPLACE_GMTIME = @REPLACE_GMTIME@
+REPLACE_ICONV = @REPLACE_ICONV@
+REPLACE_ICONV_OPEN = @REPLACE_ICONV_OPEN@
+REPLACE_ICONV_UTF = @REPLACE_ICONV_UTF@
+REPLACE_INET_NTOP = @REPLACE_INET_NTOP@
+REPLACE_INET_PTON = @REPLACE_INET_PTON@
+REPLACE_INITSTATE = @REPLACE_INITSTATE@
+REPLACE_IOCTL = @REPLACE_IOCTL@
+REPLACE_ISATTY = @REPLACE_ISATTY@
+REPLACE_ISWBLANK = @REPLACE_ISWBLANK@
+REPLACE_ISWCNTRL = @REPLACE_ISWCNTRL@
+REPLACE_ISWDIGIT = @REPLACE_ISWDIGIT@
+REPLACE_ISWXDIGIT = @REPLACE_ISWXDIGIT@
+REPLACE_ITOLD = @REPLACE_ITOLD@
+REPLACE_LCHOWN = @REPLACE_LCHOWN@
+REPLACE_LINK = @REPLACE_LINK@
+REPLACE_LINKAT = @REPLACE_LINKAT@
+REPLACE_LOCALECONV = @REPLACE_LOCALECONV@
+REPLACE_LOCALTIME = @REPLACE_LOCALTIME@
+REPLACE_LOCALTIME_R = @REPLACE_LOCALTIME_R@
+REPLACE_LSEEK = @REPLACE_LSEEK@
+REPLACE_LSTAT = @REPLACE_LSTAT@
+REPLACE_MALLOC = @REPLACE_MALLOC@
+REPLACE_MBRLEN = @REPLACE_MBRLEN@
+REPLACE_MBRTOWC = @REPLACE_MBRTOWC@
+REPLACE_MBSINIT = @REPLACE_MBSINIT@
+REPLACE_MBSNRTOWCS = @REPLACE_MBSNRTOWCS@
+REPLACE_MBSRTOWCS = @REPLACE_MBSRTOWCS@
+REPLACE_MBSTATE_T = @REPLACE_MBSTATE_T@
+REPLACE_MBTOWC = @REPLACE_MBTOWC@
+REPLACE_MEMCHR = @REPLACE_MEMCHR@
+REPLACE_MEMMEM = @REPLACE_MEMMEM@
+REPLACE_MKDIR = @REPLACE_MKDIR@
+REPLACE_MKFIFO = @REPLACE_MKFIFO@
+REPLACE_MKFIFOAT = @REPLACE_MKFIFOAT@
+REPLACE_MKNOD = @REPLACE_MKNOD@
+REPLACE_MKNODAT = @REPLACE_MKNODAT@
+REPLACE_MKSTEMP = @REPLACE_MKSTEMP@
+REPLACE_MKTIME = @REPLACE_MKTIME@
+REPLACE_NANOSLEEP = @REPLACE_NANOSLEEP@
+REPLACE_NEWLOCALE = @REPLACE_NEWLOCALE@
+REPLACE_NL_LANGINFO = @REPLACE_NL_LANGINFO@
+REPLACE_NULL = @REPLACE_NULL@
+REPLACE_OBSTACK_PRINTF = @REPLACE_OBSTACK_PRINTF@
+REPLACE_OPEN = @REPLACE_OPEN@
+REPLACE_OPENAT = @REPLACE_OPENAT@
+REPLACE_OPENDIR = @REPLACE_OPENDIR@
+REPLACE_PERROR = @REPLACE_PERROR@
+REPLACE_POPEN = @REPLACE_POPEN@
+REPLACE_POSIX_MEMALIGN = @REPLACE_POSIX_MEMALIGN@
+REPLACE_PREAD = @REPLACE_PREAD@
+REPLACE_PRINTF = @REPLACE_PRINTF@
+REPLACE_PSELECT = @REPLACE_PSELECT@
+REPLACE_PTHREAD_ATTR_DESTROY = @REPLACE_PTHREAD_ATTR_DESTROY@
+REPLACE_PTHREAD_ATTR_GETDETACHSTATE = @REPLACE_PTHREAD_ATTR_GETDETACHSTATE@
+REPLACE_PTHREAD_ATTR_INIT = @REPLACE_PTHREAD_ATTR_INIT@
+REPLACE_PTHREAD_ATTR_SETDETACHSTATE = @REPLACE_PTHREAD_ATTR_SETDETACHSTATE@
+REPLACE_PTHREAD_CONDATTR_DESTROY = @REPLACE_PTHREAD_CONDATTR_DESTROY@
+REPLACE_PTHREAD_CONDATTR_INIT = @REPLACE_PTHREAD_CONDATTR_INIT@
+REPLACE_PTHREAD_COND_BROADCAST = @REPLACE_PTHREAD_COND_BROADCAST@
+REPLACE_PTHREAD_COND_DESTROY = @REPLACE_PTHREAD_COND_DESTROY@
+REPLACE_PTHREAD_COND_INIT = @REPLACE_PTHREAD_COND_INIT@
+REPLACE_PTHREAD_COND_SIGNAL = @REPLACE_PTHREAD_COND_SIGNAL@
+REPLACE_PTHREAD_COND_TIMEDWAIT = @REPLACE_PTHREAD_COND_TIMEDWAIT@
+REPLACE_PTHREAD_COND_WAIT = @REPLACE_PTHREAD_COND_WAIT@
+REPLACE_PTHREAD_CREATE = @REPLACE_PTHREAD_CREATE@
+REPLACE_PTHREAD_DETACH = @REPLACE_PTHREAD_DETACH@
+REPLACE_PTHREAD_EQUAL = @REPLACE_PTHREAD_EQUAL@
+REPLACE_PTHREAD_EXIT = @REPLACE_PTHREAD_EXIT@
+REPLACE_PTHREAD_GETSPECIFIC = @REPLACE_PTHREAD_GETSPECIFIC@
+REPLACE_PTHREAD_JOIN = @REPLACE_PTHREAD_JOIN@
+REPLACE_PTHREAD_KEY_CREATE = @REPLACE_PTHREAD_KEY_CREATE@
+REPLACE_PTHREAD_KEY_DELETE = @REPLACE_PTHREAD_KEY_DELETE@
+REPLACE_PTHREAD_MUTEXATTR_DESTROY = @REPLACE_PTHREAD_MUTEXATTR_DESTROY@
+REPLACE_PTHREAD_MUTEXATTR_GETROBUST = @REPLACE_PTHREAD_MUTEXATTR_GETROBUST@
+REPLACE_PTHREAD_MUTEXATTR_GETTYPE = @REPLACE_PTHREAD_MUTEXATTR_GETTYPE@
+REPLACE_PTHREAD_MUTEXATTR_INIT = @REPLACE_PTHREAD_MUTEXATTR_INIT@
+REPLACE_PTHREAD_MUTEXATTR_SETROBUST = @REPLACE_PTHREAD_MUTEXATTR_SETROBUST@
+REPLACE_PTHREAD_MUTEXATTR_SETTYPE = @REPLACE_PTHREAD_MUTEXATTR_SETTYPE@
+REPLACE_PTHREAD_MUTEX_DESTROY = @REPLACE_PTHREAD_MUTEX_DESTROY@
+REPLACE_PTHREAD_MUTEX_INIT = @REPLACE_PTHREAD_MUTEX_INIT@
+REPLACE_PTHREAD_MUTEX_LOCK = @REPLACE_PTHREAD_MUTEX_LOCK@
+REPLACE_PTHREAD_MUTEX_TIMEDLOCK = @REPLACE_PTHREAD_MUTEX_TIMEDLOCK@
+REPLACE_PTHREAD_MUTEX_TRYLOCK = @REPLACE_PTHREAD_MUTEX_TRYLOCK@
+REPLACE_PTHREAD_MUTEX_UNLOCK = @REPLACE_PTHREAD_MUTEX_UNLOCK@
+REPLACE_PTHREAD_ONCE = @REPLACE_PTHREAD_ONCE@
+REPLACE_PTHREAD_RWLOCKATTR_DESTROY = @REPLACE_PTHREAD_RWLOCKATTR_DESTROY@
+REPLACE_PTHREAD_RWLOCKATTR_INIT = @REPLACE_PTHREAD_RWLOCKATTR_INIT@
+REPLACE_PTHREAD_RWLOCK_DESTROY = @REPLACE_PTHREAD_RWLOCK_DESTROY@
+REPLACE_PTHREAD_RWLOCK_INIT = @REPLACE_PTHREAD_RWLOCK_INIT@
+REPLACE_PTHREAD_RWLOCK_RDLOCK = @REPLACE_PTHREAD_RWLOCK_RDLOCK@
+REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK = @REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK@
+REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK = @REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK@
+REPLACE_PTHREAD_RWLOCK_TRYRDLOCK = @REPLACE_PTHREAD_RWLOCK_TRYRDLOCK@
+REPLACE_PTHREAD_RWLOCK_TRYWRLOCK = @REPLACE_PTHREAD_RWLOCK_TRYWRLOCK@
+REPLACE_PTHREAD_RWLOCK_UNLOCK = @REPLACE_PTHREAD_RWLOCK_UNLOCK@
+REPLACE_PTHREAD_RWLOCK_WRLOCK = @REPLACE_PTHREAD_RWLOCK_WRLOCK@
+REPLACE_PTHREAD_SELF = @REPLACE_PTHREAD_SELF@
+REPLACE_PTHREAD_SETSPECIFIC = @REPLACE_PTHREAD_SETSPECIFIC@
+REPLACE_PTHREAD_SIGMASK = @REPLACE_PTHREAD_SIGMASK@
+REPLACE_PTHREAD_SPIN_DESTROY = @REPLACE_PTHREAD_SPIN_DESTROY@
+REPLACE_PTHREAD_SPIN_INIT = @REPLACE_PTHREAD_SPIN_INIT@
+REPLACE_PTHREAD_SPIN_LOCK = @REPLACE_PTHREAD_SPIN_LOCK@
+REPLACE_PTHREAD_SPIN_TRYLOCK = @REPLACE_PTHREAD_SPIN_TRYLOCK@
+REPLACE_PTHREAD_SPIN_UNLOCK = @REPLACE_PTHREAD_SPIN_UNLOCK@
+REPLACE_PTSNAME = @REPLACE_PTSNAME@
+REPLACE_PTSNAME_R = @REPLACE_PTSNAME_R@
+REPLACE_PUTENV = @REPLACE_PUTENV@
+REPLACE_PWRITE = @REPLACE_PWRITE@
+REPLACE_QSORT_R = @REPLACE_QSORT_R@
+REPLACE_RAISE = @REPLACE_RAISE@
+REPLACE_RANDOM = @REPLACE_RANDOM@
+REPLACE_RANDOM_R = @REPLACE_RANDOM_R@
+REPLACE_READ = @REPLACE_READ@
+REPLACE_READLINK = @REPLACE_READLINK@
+REPLACE_READLINKAT = @REPLACE_READLINKAT@
+REPLACE_REALLOC = @REPLACE_REALLOC@
+REPLACE_REALLOCARRAY = @REPLACE_REALLOCARRAY@
+REPLACE_REALPATH = @REPLACE_REALPATH@
+REPLACE_REMOVE = @REPLACE_REMOVE@
+REPLACE_RENAME = @REPLACE_RENAME@
+REPLACE_RENAMEAT = @REPLACE_RENAMEAT@
+REPLACE_RMDIR = @REPLACE_RMDIR@
+REPLACE_SCHED_YIELD = @REPLACE_SCHED_YIELD@
+REPLACE_SELECT = @REPLACE_SELECT@
+REPLACE_SETENV = @REPLACE_SETENV@
+REPLACE_SETLOCALE = @REPLACE_SETLOCALE@
+REPLACE_SETSTATE = @REPLACE_SETSTATE@
+REPLACE_SLEEP = @REPLACE_SLEEP@
+REPLACE_SNPRINTF = @REPLACE_SNPRINTF@
+REPLACE_SPRINTF = @REPLACE_SPRINTF@
+REPLACE_STAT = @REPLACE_STAT@
+REPLACE_STDIO_READ_FUNCS = @REPLACE_STDIO_READ_FUNCS@
+REPLACE_STDIO_WRITE_FUNCS = @REPLACE_STDIO_WRITE_FUNCS@
+REPLACE_STPNCPY = @REPLACE_STPNCPY@
+REPLACE_STRCASESTR = @REPLACE_STRCASESTR@
+REPLACE_STRCHRNUL = @REPLACE_STRCHRNUL@
+REPLACE_STRDUP = @REPLACE_STRDUP@
+REPLACE_STRERROR = @REPLACE_STRERROR@
+REPLACE_STRERRORNAME_NP = @REPLACE_STRERRORNAME_NP@
+REPLACE_STRERROR_R = @REPLACE_STRERROR_R@
+REPLACE_STRFTIME = @REPLACE_STRFTIME@
+REPLACE_STRNCAT = @REPLACE_STRNCAT@
+REPLACE_STRNDUP = @REPLACE_STRNDUP@
+REPLACE_STRNLEN = @REPLACE_STRNLEN@
+REPLACE_STRSIGNAL = @REPLACE_STRSIGNAL@
+REPLACE_STRSTR = @REPLACE_STRSTR@
+REPLACE_STRTOD = @REPLACE_STRTOD@
+REPLACE_STRTOIMAX = @REPLACE_STRTOIMAX@
+REPLACE_STRTOK_R = @REPLACE_STRTOK_R@
+REPLACE_STRTOL = @REPLACE_STRTOL@
+REPLACE_STRTOLD = @REPLACE_STRTOLD@
+REPLACE_STRTOLL = @REPLACE_STRTOLL@
+REPLACE_STRTOUL = @REPLACE_STRTOUL@
+REPLACE_STRTOULL = @REPLACE_STRTOULL@
+REPLACE_STRTOUMAX = @REPLACE_STRTOUMAX@
+REPLACE_STRUCT_LCONV = @REPLACE_STRUCT_LCONV@
+REPLACE_STRUCT_TIMEVAL = @REPLACE_STRUCT_TIMEVAL@
+REPLACE_SYMLINK = @REPLACE_SYMLINK@
+REPLACE_SYMLINKAT = @REPLACE_SYMLINKAT@
+REPLACE_TIMEGM = @REPLACE_TIMEGM@
+REPLACE_TMPFILE = @REPLACE_TMPFILE@
+REPLACE_TOWLOWER = @REPLACE_TOWLOWER@
+REPLACE_TRUNCATE = @REPLACE_TRUNCATE@
+REPLACE_TTYNAME_R = @REPLACE_TTYNAME_R@
+REPLACE_TZSET = @REPLACE_TZSET@
+REPLACE_UNLINK = @REPLACE_UNLINK@
+REPLACE_UNLINKAT = @REPLACE_UNLINKAT@
+REPLACE_UNSETENV = @REPLACE_UNSETENV@
+REPLACE_USLEEP = @REPLACE_USLEEP@
+REPLACE_UTIMENSAT = @REPLACE_UTIMENSAT@
+REPLACE_VASPRINTF = @REPLACE_VASPRINTF@
+REPLACE_VDPRINTF = @REPLACE_VDPRINTF@
+REPLACE_VFPRINTF = @REPLACE_VFPRINTF@
+REPLACE_VPRINTF = @REPLACE_VPRINTF@
+REPLACE_VSNPRINTF = @REPLACE_VSNPRINTF@
+REPLACE_VSPRINTF = @REPLACE_VSPRINTF@
+REPLACE_WCRTOMB = @REPLACE_WCRTOMB@
+REPLACE_WCSFTIME = @REPLACE_WCSFTIME@
+REPLACE_WCSNRTOMBS = @REPLACE_WCSNRTOMBS@
+REPLACE_WCSRTOMBS = @REPLACE_WCSRTOMBS@
+REPLACE_WCSTOK = @REPLACE_WCSTOK@
+REPLACE_WCSWIDTH = @REPLACE_WCSWIDTH@
+REPLACE_WCTOB = @REPLACE_WCTOB@
+REPLACE_WCTOMB = @REPLACE_WCTOMB@
+REPLACE_WCWIDTH = @REPLACE_WCWIDTH@
+REPLACE_WRITE = @REPLACE_WRITE@
+SED = @SED@
+SET_MAKE = @SET_MAKE@
+SHELL = @SHELL@
+SIGSEGV_H = @SIGSEGV_H@
+SIG_ATOMIC_T_SUFFIX = @SIG_ATOMIC_T_SUFFIX@
+SIZE_T_SUFFIX = @SIZE_T_SUFFIX@
+STDALIGN_H = @STDALIGN_H@
+STDARG_H = @STDARG_H@
+STDBOOL_H = @STDBOOL_H@
+STDDEF_H = @STDDEF_H@
+STDINT_H = @STDINT_H@
+STRIP = @STRIP@
+SYS_IOCTL_H_HAVE_WINSOCK2_H = @SYS_IOCTL_H_HAVE_WINSOCK2_H@
+SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS = @SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
+SYS_TIME_H_DEFINES_STRUCT_TIMESPEC = @SYS_TIME_H_DEFINES_STRUCT_TIMESPEC@
+TIME_H_DEFINES_STRUCT_TIMESPEC = @TIME_H_DEFINES_STRUCT_TIMESPEC@
+TIME_H_DEFINES_TIME_UTC = @TIME_H_DEFINES_TIME_UTC@
+UINT32_MAX_LT_UINTMAX_MAX = @UINT32_MAX_LT_UINTMAX_MAX@
+UINT64_MAX_EQ_ULONG_MAX = @UINT64_MAX_EQ_ULONG_MAX@
+UNDEFINE_STRTOK_R = @UNDEFINE_STRTOK_R@
+UNISTD_H_DEFINES_STRUCT_TIMESPEC = @UNISTD_H_DEFINES_STRUCT_TIMESPEC@
+UNISTD_H_HAVE_SYS_RANDOM_H = @UNISTD_H_HAVE_SYS_RANDOM_H@
+UNISTD_H_HAVE_WINSOCK2_H = @UNISTD_H_HAVE_WINSOCK2_H@
+UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS = @UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
+USE_NLS = @USE_NLS@
+VERSION = @VERSION@
+WARN_CFLAGS = @WARN_CFLAGS@
+WCHAR_T_SUFFIX = @WCHAR_T_SUFFIX@
+WERROR_CFLAGS = @WERROR_CFLAGS@
+WINDOWS_64_BIT_OFF_T = @WINDOWS_64_BIT_OFF_T@
+WINDOWS_64_BIT_ST_SIZE = @WINDOWS_64_BIT_ST_SIZE@
+WINDOWS_STAT_INODES = @WINDOWS_STAT_INODES@
+WINDOWS_STAT_TIMESPEC = @WINDOWS_STAT_TIMESPEC@
+WINT_T_SUFFIX = @WINT_T_SUFFIX@
+XGETTEXT = @XGETTEXT@
+XGETTEXT_015 = @XGETTEXT_015@
+XGETTEXT_EXTRA_OPTIONS = @XGETTEXT_EXTRA_OPTIONS@
+abs_aux_dir = @abs_aux_dir@
+abs_builddir = @abs_builddir@
+abs_srcdir = @abs_srcdir@
+abs_top_builddir = @abs_top_builddir@
+abs_top_srcdir = @abs_top_srcdir@
+ac_ct_CC = @ac_ct_CC@
+am__include = @am__include@
+am__leading_dot = @am__leading_dot@
+am__quote = @am__quote@
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+bindir = @bindir@
+build = @build@
+build_alias = @build_alias@
+build_cpu = @build_cpu@
+build_os = @build_os@
+build_vendor = @build_vendor@
+builddir = @builddir@
+datadir = @datadir@
+datarootdir = @datarootdir@
+docdir = @docdir@
+dvidir = @dvidir@
+exec_prefix = @exec_prefix@
+gl_LIBOBJS = @gl_LIBOBJS@
+gl_LTLIBOBJS = @gl_LTLIBOBJS@
+gltests_LIBOBJS = @gltests_LIBOBJS@
+gltests_LTLIBOBJS = @gltests_LTLIBOBJS@
+gltests_WITNESS = @gltests_WITNESS@
+host = @host@
+host_alias = @host_alias@
+host_cpu = @host_cpu@
+host_os = @host_os@
+host_vendor = @host_vendor@
+htmldir = @htmldir@
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+infodir = @infodir@
+install_sh = @install_sh@
+libdir = @libdir@
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+lispdir = @lispdir@
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+mandir = @mandir@
+mkdir_p = @mkdir_p@
+oldincludedir = @oldincludedir@
+pdfdir = @pdfdir@
+prefix = @prefix@
+program_transform_name = @program_transform_name@
+psdir = @psdir@
+runstatedir = @runstatedir@
+sbindir = @sbindir@
+sharedstatedir = @sharedstatedir@
+srcdir = @srcdir@
+sysconfdir = @sysconfdir@
+target_alias = @target_alias@
+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+AM_CFLAGS = $(GNULIB_WARN_CFLAGS) $(WERROR_CFLAGS)
+AM_CPPFLAGS = 
+BUILT_SOURCES = $(ALLOCA_H) configmake.h ctype.h dirent.h \
+	malloc/dynarray.gl.h malloc/dynarray-skeleton.gl.h $(ERRNO_H) \
+	fcntl.h $(FNMATCH_H) $(GETOPT_H) $(GETOPT_CDEFS_H) $(ICONV_H) \
+	iconv_open-aix.h iconv_open-hpux.h iconv_open-irix.h \
+	iconv_open-osf.h iconv_open-solaris.h iconv_open-zos.h \
+	inttypes.h langinfo.h $(LIMITS_H) locale.h signal.h \
+	$(SIGSEGV_H) $(STDALIGN_H) $(STDARG_H) $(STDBOOL_H) \
+	$(STDDEF_H) $(STDINT_H) stdio.h stdlib.h string.h sys/stat.h \
+	sys/types.h time.h unistd.h $(LIBUNISTRING_UNISTR_H) \
+	$(LIBUNISTRING_UNITYPES_H) $(LIBUNISTRING_UNIWIDTH_H) wchar.h \
+	wctype.h
+CLEANFILES = configmake.h configmake.h-t colorize.c
+EXTRA_DIST = alignof.h alloca.c alloca.in.h \
+	$(top_srcdir)/build-aux/announce-gen argmatch.h assure.h \
+	attribute.h basename-lgpl.h btowc.c c-strcaseeq.h calloc.c \
+	calloc.c chdir-long.c chdir-long.h cloexec.h close.c \
+	close-stream.h closedir.c dirent-private.h closeout.h \
+	ctype.in.h cycle-check.h dev-ino.h dfa.h localeinfo.h \
+	dirent.in.h dirfd.c dirname.h \
+	$(top_srcdir)/build-aux/do-release-commit-and-tag dup.c dup2.c \
+	dynarray.h malloc/dynarray-skeleton.c malloc/dynarray.h \
+	errno.in.h error.c error.h exclude.h exitfail.h fchdir.c \
+	fcntl.c fcntl.in.h fcntl--.h fcntl-safer.h fd-hook.h \
+	fdopendir.c filename.h filenamecat.h flexmember.h fnmatch.c \
+	fnmatch_loop.c fnmatch.in.h fopen.c fopen.c fpending.c \
+	fpending.h stdio-impl.h free.c fstat.c stat-w32.c stat-w32.h \
+	at-func.c fstatat.c fts-cycle.c fts.c fts_.h \
+	$(top_srcdir)/build-aux/gendocs.sh getcwd-lgpl.c \
+	getdtablesize.c getopt-cdefs.in.h getopt-core.h getopt-ext.h \
+	getopt-pfx-core.h getopt-pfx-ext.h getopt.c getopt.in.h \
+	getopt1.c getopt_int.h getpagesize.c \
+	$(top_srcdir)/build-aux/git-version-gen \
+	$(top_srcdir)/build-aux/gitlog-to-changelog \
+	$(top_srcdir)/build-aux/gnu-web-doc-update \
+	$(top_srcdir)/GNUmakefile $(top_srcdir)/build-aux/gnupload \
+	hard-locale.h hash.h $(top_srcdir)/build-aux/config.rpath \
+	i-ring.h ialloc.h iconv.in.h iconv_open-aix.h \
+	iconv_open-hpux.h iconv_open-irix.h iconv_open-osf.h \
+	iconv_open-solaris.h iconv_open-zos.h iconv.c iconv_close.c \
+	iconv_open-aix.gperf iconv_open-hpux.gperf \
+	iconv_open-irix.gperf iconv_open-osf.gperf \
+	iconv_open-solaris.gperf iconv_open-zos.gperf iconv_open.c \
+	ignore-value.h intprops.h inttypes.in.h isatty.c isblank.c \
+	iswblank.c iswctype-impl.h iswctype.c iswdigit.c iswxdigit.c \
+	langinfo.in.h cdefs.h libc-config.h limits.in.h localcharset.h \
+	locale.in.h localeconv.c lseek.c lstat.c \
+	$(top_srcdir)/maint.mk malloc.c malloc.c malloca.h mbchar.h \
+	mbrlen.c lc-charset-dispatch.c lc-charset-dispatch.h \
+	mbrtowc-impl-utf8.h mbrtowc-impl.h mbrtowc.c mbtowc-lock.c \
+	mbtowc-lock.h windows-initguard.h mbsinit.c mbsrtowcs-impl.h \
+	mbsrtowcs-state.c mbsrtowcs.c str-kmp.h mbtowc-impl.h mbtowc.c \
+	memchr.c memchr.valgrind memchr2.valgrind mempcpy.c memrchr.c \
+	msvc-inval.c msvc-inval.h msvc-nothrow.c msvc-nothrow.h \
+	nl_langinfo-lock.c nl_langinfo.c windows-initguard.h obstack.c \
+	obstack.h open.c openat.c openat.h fcntl--.h fcntl-safer.h \
+	dirent-private.h opendir.c opendirat.h pathmax.h pipe.c \
+	quote.h quote.h quotearg.h raise.c rawmemchr.c \
+	rawmemchr.valgrind read.c dirent-private.h readdir.c realloc.c \
+	realloc.c reallocarray.c regcomp.c regex.c regex.h \
+	regex_internal.c regex_internal.h regexec.c safe-read.h \
+	sys-limits.h same-inode.h save-cwd.h setlocale-lock.c \
+	setlocale_null.h windows-initguard.h signal.in.h sigsegv.in.h \
+	stackvma.h _Noreturn.h arg-nonnull.h c++defs.h warn-on-use.h \
+	stat-w32.c stat-w32.h stat.c stat-time.h stdalign.in.h \
+	stdarg.in.h stdbool.in.h stddef.in.h stdint.in.h stdio.in.h \
+	stdlib.in.h stpcpy.c strdup.c streq.h strerror.c \
+	strerror-override.c strerror-override.h string.in.h strnlen.c \
+	strstr.c str-two-way.h strstr.c strtoimax.c strtol.c strtoll.c \
+	strtol.c strtoul.c strtoull.c strtoimax.c strtoumax.c \
+	sys_stat.in.h sys_types.in.h time.in.h trim.h unistd.in.h \
+	unistd--.h unistd-safer.h unistr.in.h unitypes.in.h \
+	localcharset.h uniwidth.in.h uniwidth/cjk.h unlocked-io.h \
+	$(top_srcdir)/build-aux/update-copyright \
+	$(top_srcdir)/build-aux/useless-if-before-free \
+	$(top_srcdir)/build-aux/vc-list-files verify.h wchar.in.h \
+	wcrtomb.c wctob.c wctomb-impl.h wctomb.c wctype.in.h wcwidth.c \
+	windows-initguard.h windows-mutex.c windows-mutex.h \
+	windows-once.c windows-once.h windows-initguard.h \
+	windows-recmutex.c windows-recmutex.h windows-initguard.h \
+	windows-rwlock.c windows-rwlock.h wmemchr-impl.h wmemchr.c \
+	wmempcpy.c xalloc.h xalloc.h xalloc-oversized.h xstrtol.h \
+	colorize-posix.c colorize-w32.c
+MAINTAINERCLEANFILES = iconv_open-aix.h iconv_open-hpux.h \
+	iconv_open-irix.h iconv_open-osf.h iconv_open-solaris.h \
+	iconv_open-zos.h
+MOSTLYCLEANDIRS = sys
+MOSTLYCLEANFILES = core *.stackdump alloca.h alloca.h-t ctype.h \
+	ctype.h-t dirent.h dirent.h-t malloc/dynarray.gl.h \
+	malloc/dynarray.gl.h-t malloc/dynarray-skeleton.gl.h \
+	malloc/dynarray-skeleton.gl.h-t errno.h errno.h-t fcntl.h \
+	fcntl.h-t fnmatch.h fnmatch.h-t getopt.h getopt.h-t \
+	getopt-cdefs.h getopt-cdefs.h-t iconv.h iconv.h-t \
+	iconv_open-aix.h-t iconv_open-hpux.h-t iconv_open-irix.h-t \
+	iconv_open-osf.h-t iconv_open-solaris.h-t iconv_open-zos.h-t \
+	inttypes.h inttypes.h-t langinfo.h langinfo.h-t limits.h \
+	limits.h-t locale.h locale.h-t signal.h signal.h-t sigsegv.h \
+	sigsegv.h-t stdalign.h stdalign.h-t stdarg.h stdarg.h-t \
+	stdbool.h stdbool.h-t stddef.h stddef.h-t stdint.h stdint.h-t \
+	stdio.h stdio.h-t stdlib.h stdlib.h-t string.h string.h-t \
+	sys/stat.h sys/stat.h-t sys/types.h sys/types.h-t time.h \
+	time.h-t unistd.h unistd.h-t unistr.h unistr.h-t unitypes.h \
+	unitypes.h-t uniwidth.h uniwidth.h-t wchar.h wchar.h-t \
+	wctype.h wctype.h-t
+SUFFIXES = 
+# No GNU Make output.
+noinst_LIBRARIES = libgreputils.a
+libgreputils_a_SOURCES = argmatch.c openat-priv.h openat-proc.c \
+	basename-lgpl.c binary-io.h binary-io.c bitrotate.h \
+	bitrotate.c c-ctype.h c-ctype.c c-stack.h c-stack.c \
+	c-strcase.h c-strcasecmp.c c-strncasecmp.c cloexec.c \
+	close-stream.c closeout.c cycle-check.c dfa.c localeinfo.c \
+	dirname-lgpl.c stripslash.c malloc/dynarray_at_failure.c \
+	malloc/dynarray_emplace_enlarge.c malloc/dynarray_finalize.c \
+	malloc/dynarray_resize.c malloc/dynarray_resize_clear.c \
+	exclude.c exitfail.c creat-safer.c open-safer.c fd-hook.c \
+	fd-safer-flag.c dup-safer-flag.c filenamecat-lgpl.c \
+	getprogname.h getprogname.c gettext.h hard-locale.c hash.c \
+	i-ring.c ialloc.c idx.h localcharset.c glthread/lock.h \
+	glthread/lock.c malloca.c mbchar.c mbiter.h mbiter.c \
+	mbscasecmp.c mbslen.c mbsstr.c mbuiter.h mbuiter.c memchr2.h \
+	memchr2.c minmax.h openat-die.c openat-safer.c opendirat.c \
+	propername.h propername.c quotearg.c safe-read.c save-cwd.c \
+	setlocale_null.c $(am__append_1) stat-time.c striconv.h \
+	striconv.c strnlen1.h strnlen1.c glthread/threadlib.c trim.c \
+	unistd.c dup-safer.c fd-safer.c pipe-safer.c $(am__append_2) \
+	$(am__append_3) $(am__append_4) version-etc.h version-etc.c \
+	version-etc-fsf.c wctype-h.c xmalloc.c xalloc-die.c \
+	xbinary-io.h xbinary-io.c xstriconv.h xstriconv.c xstrtoimax.c \
+	xstrtol.c xstrtoul.c colorize.h
+libgreputils_a_LIBADD = $(gl_LIBOBJS) @ALLOCA@ $(LIBOBJS) $(ALLOCA)
+libgreputils_a_DEPENDENCIES = $(gl_LIBOBJS) @ALLOCA@ $(LIBOBJS) \
+	$(ALLOCA)
+EXTRA_libgreputils_a_SOURCES = alloca.c btowc.c calloc.c calloc.c \
+	chdir-long.c close.c closedir.c dirfd.c dup.c dup2.c \
+	malloc/dynarray-skeleton.c error.c fchdir.c fcntl.c \
+	fdopendir.c fnmatch.c fnmatch_loop.c fopen.c fopen.c \
+	fpending.c free.c fstat.c stat-w32.c at-func.c fstatat.c \
+	fts-cycle.c fts.c getcwd-lgpl.c getdtablesize.c getopt.c \
+	getopt1.c getpagesize.c iconv.c iconv_close.c iconv_open.c \
+	isatty.c isblank.c iswblank.c iswctype.c iswdigit.c \
+	iswxdigit.c localeconv.c lseek.c lstat.c malloc.c malloc.c \
+	mbrlen.c lc-charset-dispatch.c mbrtowc.c mbtowc-lock.c \
+	mbsinit.c mbsrtowcs-state.c mbsrtowcs.c mbtowc.c memchr.c \
+	mempcpy.c memrchr.c msvc-inval.c msvc-nothrow.c \
+	nl_langinfo-lock.c nl_langinfo.c obstack.c open.c openat.c \
+	opendir.c pipe.c raise.c rawmemchr.c read.c readdir.c \
+	realloc.c realloc.c reallocarray.c regcomp.c regex.c \
+	regex_internal.c regexec.c setlocale-lock.c stat-w32.c stat.c \
+	stpcpy.c strdup.c strerror.c strerror-override.c strnlen.c \
+	strstr.c strstr.c strtoimax.c strtol.c strtoll.c strtol.c \
+	strtoul.c strtoull.c strtoimax.c strtoumax.c wcrtomb.c wctob.c \
+	wctomb.c wcwidth.c windows-mutex.c windows-once.c \
+	windows-recmutex.c windows-rwlock.c wmemchr.c wmempcpy.c
+
+# Use this preprocessor expression to decide whether #include_next works.
+# Do not rely on a 'configure'-time test for this, since the expression
+# might appear in an installed header, which is used by some other compiler.
+HAVE_INCLUDE_NEXT = (__GNUC__ || __clang__ || 60000000 <= __DECC_VER)
+GPERF = gperf
+V_GPERF = $(V_GPERF_@AM_V@)
+V_GPERF_ = $(V_GPERF_@AM_DEFAULT_V@)
+V_GPERF_0 = @echo "  GPERF   " $@;
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+_NORETURN_H = $(srcdir)/_Noreturn.h
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+ARG_NONNULL_H = $(srcdir)/arg-nonnull.h
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+CXXDEFS_H = $(srcdir)/c++defs.h
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+WARN_ON_USE_H = $(srcdir)/warn-on-use.h
+nodist_libgreputils_a_SOURCES = colorize.c
+all: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .o .obj
+$(srcdir)/Makefile.in:  $(srcdir)/Makefile.am $(srcdir)/gnulib.mk $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu lib/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu lib/Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles);; \
+	esac;
+$(srcdir)/gnulib.mk $(am__empty):
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure:  $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4):  $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+clean-noinstLIBRARIES:
+	-test -z "$(noinst_LIBRARIES)" || rm -f $(noinst_LIBRARIES)
+malloc/$(am__dirstamp):
+	@$(MKDIR_P) malloc
+	@: > malloc/$(am__dirstamp)
+malloc/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) malloc/$(DEPDIR)
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+	-rm -f ./$(DEPDIR)/mbslen.Po
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+	-rm -f ./$(DEPDIR)/mbsrtowcs.Po
+	-rm -f ./$(DEPDIR)/mbsstr.Po
+	-rm -f ./$(DEPDIR)/mbtowc-lock.Po
+	-rm -f ./$(DEPDIR)/mbtowc.Po
+	-rm -f ./$(DEPDIR)/mbuiter.Po
+	-rm -f ./$(DEPDIR)/memchr.Po
+	-rm -f ./$(DEPDIR)/memchr2.Po
+	-rm -f ./$(DEPDIR)/mempcpy.Po
+	-rm -f ./$(DEPDIR)/memrchr.Po
+	-rm -f ./$(DEPDIR)/msvc-inval.Po
+	-rm -f ./$(DEPDIR)/msvc-nothrow.Po
+	-rm -f ./$(DEPDIR)/nl_langinfo-lock.Po
+	-rm -f ./$(DEPDIR)/nl_langinfo.Po
+	-rm -f ./$(DEPDIR)/obstack.Po
+	-rm -f ./$(DEPDIR)/open-safer.Po
+	-rm -f ./$(DEPDIR)/open.Po
+	-rm -f ./$(DEPDIR)/openat-die.Po
+	-rm -f ./$(DEPDIR)/openat-proc.Po
+	-rm -f ./$(DEPDIR)/openat-safer.Po
+	-rm -f ./$(DEPDIR)/openat.Po
+	-rm -f ./$(DEPDIR)/opendir.Po
+	-rm -f ./$(DEPDIR)/opendirat.Po
+	-rm -f ./$(DEPDIR)/pipe-safer.Po
+	-rm -f ./$(DEPDIR)/pipe.Po
+	-rm -f ./$(DEPDIR)/propername.Po
+	-rm -f ./$(DEPDIR)/quotearg.Po
+	-rm -f ./$(DEPDIR)/raise.Po
+	-rm -f ./$(DEPDIR)/rawmemchr.Po
+	-rm -f ./$(DEPDIR)/read.Po
+	-rm -f ./$(DEPDIR)/readdir.Po
+	-rm -f ./$(DEPDIR)/realloc.Po
+	-rm -f ./$(DEPDIR)/reallocarray.Po
+	-rm -f ./$(DEPDIR)/regcomp.Po
+	-rm -f ./$(DEPDIR)/regex.Po
+	-rm -f ./$(DEPDIR)/regex_internal.Po
+	-rm -f ./$(DEPDIR)/regexec.Po
+	-rm -f ./$(DEPDIR)/safe-read.Po
+	-rm -f ./$(DEPDIR)/save-cwd.Po
+	-rm -f ./$(DEPDIR)/setlocale-lock.Po
+	-rm -f ./$(DEPDIR)/setlocale_null.Po
+	-rm -f ./$(DEPDIR)/sigsegv.Po
+	-rm -f ./$(DEPDIR)/stackvma.Po
+	-rm -f ./$(DEPDIR)/stat-time.Po
+	-rm -f ./$(DEPDIR)/stat-w32.Po
+	-rm -f ./$(DEPDIR)/stat.Po
+	-rm -f ./$(DEPDIR)/stpcpy.Po
+	-rm -f ./$(DEPDIR)/strdup.Po
+	-rm -f ./$(DEPDIR)/strerror-override.Po
+	-rm -f ./$(DEPDIR)/strerror.Po
+	-rm -f ./$(DEPDIR)/striconv.Po
+	-rm -f ./$(DEPDIR)/stripslash.Po
+	-rm -f ./$(DEPDIR)/strnlen.Po
+	-rm -f ./$(DEPDIR)/strnlen1.Po
+	-rm -f ./$(DEPDIR)/strstr.Po
+	-rm -f ./$(DEPDIR)/strtoimax.Po
+	-rm -f ./$(DEPDIR)/strtol.Po
+	-rm -f ./$(DEPDIR)/strtoll.Po
+	-rm -f ./$(DEPDIR)/strtoul.Po
+	-rm -f ./$(DEPDIR)/strtoull.Po
+	-rm -f ./$(DEPDIR)/strtoumax.Po
+	-rm -f ./$(DEPDIR)/trim.Po
+	-rm -f ./$(DEPDIR)/unistd.Po
+	-rm -f ./$(DEPDIR)/version-etc-fsf.Po
+	-rm -f ./$(DEPDIR)/version-etc.Po
+	-rm -f ./$(DEPDIR)/wcrtomb.Po
+	-rm -f ./$(DEPDIR)/wctob.Po
+	-rm -f ./$(DEPDIR)/wctomb.Po
+	-rm -f ./$(DEPDIR)/wctype-h.Po
+	-rm -f ./$(DEPDIR)/wcwidth.Po
+	-rm -f ./$(DEPDIR)/windows-mutex.Po
+	-rm -f ./$(DEPDIR)/windows-once.Po
+	-rm -f ./$(DEPDIR)/windows-recmutex.Po
+	-rm -f ./$(DEPDIR)/windows-rwlock.Po
+	-rm -f ./$(DEPDIR)/wmemchr.Po
+	-rm -f ./$(DEPDIR)/wmempcpy.Po
+	-rm -f ./$(DEPDIR)/xalloc-die.Po
+	-rm -f ./$(DEPDIR)/xbinary-io.Po
+	-rm -f ./$(DEPDIR)/xmalloc.Po
+	-rm -f ./$(DEPDIR)/xstriconv.Po
+	-rm -f ./$(DEPDIR)/xstrtoimax.Po
+	-rm -f ./$(DEPDIR)/xstrtol.Po
+	-rm -f ./$(DEPDIR)/xstrtoul.Po
+	-rm -f glthread/$(DEPDIR)/lock.Po
+	-rm -f glthread/$(DEPDIR)/threadlib.Po
+	-rm -f malloc/$(DEPDIR)/dynarray-skeleton.Po
+	-rm -f malloc/$(DEPDIR)/dynarray_at_failure.Po
+	-rm -f malloc/$(DEPDIR)/dynarray_emplace_enlarge.Po
+	-rm -f malloc/$(DEPDIR)/dynarray_finalize.Po
+	-rm -f malloc/$(DEPDIR)/dynarray_resize.Po
+	-rm -f malloc/$(DEPDIR)/dynarray_resize_clear.Po
+	-rm -f unistr/$(DEPDIR)/u8-mbtoucr.Po
+	-rm -f unistr/$(DEPDIR)/u8-uctomb-aux.Po
+	-rm -f unistr/$(DEPDIR)/u8-uctomb.Po
+	-rm -f uniwidth/$(DEPDIR)/width.Po
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-local
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am:
+
+.MAKE: all check install install-am install-exec install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+	clean-generic clean-noinstLIBRARIES cscopelist-am ctags \
+	ctags-am distclean distclean-compile distclean-generic \
+	distclean-local distclean-tags distdir dvi dvi-am html html-am \
+	info info-am install install-am install-data install-data-am \
+	install-dvi install-dvi-am install-exec install-exec-am \
+	install-html install-html-am install-info install-info-am \
+	install-man install-pdf install-pdf-am install-ps \
+	install-ps-am install-strip installcheck installcheck-am \
+	installdirs maintainer-clean maintainer-clean-generic \
+	mostlyclean mostlyclean-compile mostlyclean-generic \
+	mostlyclean-local pdf pdf-am ps ps-am tags tags-am uninstall \
+	uninstall-am
+
+.PRECIOUS: Makefile
+
+
+# We need the following in order to create <alloca.h> when the system
+# doesn't have one that works with the given compiler.
+@GL_GENERATE_ALLOCA_H_TRUE@alloca.h: alloca.in.h $(top_builddir)/config.status
+@GL_GENERATE_ALLOCA_H_TRUE@	$(AM_V_GEN)rm -f $@-t $@ && \
+@GL_GENERATE_ALLOCA_H_TRUE@	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+@GL_GENERATE_ALLOCA_H_TRUE@	  sed -e 's|@''HAVE_ALLOCA_H''@|$(HAVE_ALLOCA_H)|g' < $(srcdir)/alloca.in.h; \
+@GL_GENERATE_ALLOCA_H_TRUE@	} > $@-t && \
+@GL_GENERATE_ALLOCA_H_TRUE@	mv -f $@-t $@
+@GL_GENERATE_ALLOCA_H_FALSE@alloca.h: $(top_builddir)/config.status
+@GL_GENERATE_ALLOCA_H_FALSE@	rm -f $@
+
+# Listed in the same order as the GNU makefile conventions, and
+# provided by autoconf 2.59c+ or 2.70.
+# The Automake-defined pkg* macros are appended, in the order
+# listed in the Automake 1.10a+ documentation.
+configmake.h: Makefile
+	$(AM_V_GEN)rm -f $@-t && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  echo '#if HAVE_WINSOCK2_H'; \
+	  echo '# include <winsock2.h> /* avoid mingw pollution on DATADIR */'; \
+	  echo '#endif'; \
+	  echo '#define PREFIX "$(prefix)"'; \
+	  echo '#define EXEC_PREFIX "$(exec_prefix)"'; \
+	  echo '#define BINDIR "$(bindir)"'; \
+	  echo '#define SBINDIR "$(sbindir)"'; \
+	  echo '#define LIBEXECDIR "$(libexecdir)"'; \
+	  echo '#define DATAROOTDIR "$(datarootdir)"'; \
+	  echo '#define DATADIR "$(datadir)"'; \
+	  echo '#define SYSCONFDIR "$(sysconfdir)"'; \
+	  echo '#define SHAREDSTATEDIR "$(sharedstatedir)"'; \
+	  echo '#define LOCALSTATEDIR "$(localstatedir)"'; \
+	  echo '#define RUNSTATEDIR "$(runstatedir)"'; \
+	  echo '#define INCLUDEDIR "$(includedir)"'; \
+	  echo '#define OLDINCLUDEDIR "$(oldincludedir)"'; \
+	  echo '#define DOCDIR "$(docdir)"'; \
+	  echo '#define INFODIR "$(infodir)"'; \
+	  echo '#define HTMLDIR "$(htmldir)"'; \
+	  echo '#define DVIDIR "$(dvidir)"'; \
+	  echo '#define PDFDIR "$(pdfdir)"'; \
+	  echo '#define PSDIR "$(psdir)"'; \
+	  echo '#define LIBDIR "$(libdir)"'; \
+	  echo '#define LISPDIR "$(lispdir)"'; \
+	  echo '#define LOCALEDIR "$(localedir)"'; \
+	  echo '#define MANDIR "$(mandir)"'; \
+	  echo '#define MANEXT "$(manext)"'; \
+	  echo '#define PKGDATADIR "$(pkgdatadir)"'; \
+	  echo '#define PKGINCLUDEDIR "$(pkgincludedir)"'; \
+	  echo '#define PKGLIBDIR "$(pkglibdir)"'; \
+	  echo '#define PKGLIBEXECDIR "$(pkglibexecdir)"'; \
+	} | sed '/""/d' > $@-t && \
+	mv -f $@-t $@
+
+# We need the following in order to create <ctype.h> when the system
+# doesn't have one that works with the given compiler.
+ctype.h: ctype.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_CTYPE_H''@|$(NEXT_CTYPE_H)|g' \
+	      -e 's/@''GNULIB_ISBLANK''@/$(GL_GNULIB_ISBLANK)/g' \
+	      -e 's/@''HAVE_ISBLANK''@/$(HAVE_ISBLANK)/g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/ctype.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <dirent.h> when the system
+# doesn't have one that works with the given compiler.
+dirent.h: dirent.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''HAVE_DIRENT_H''@|$(HAVE_DIRENT_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_DIRENT_H''@|$(NEXT_DIRENT_H)|g' \
+	      -e 's/@''GNULIB_OPENDIR''@/$(GL_GNULIB_OPENDIR)/g' \
+	      -e 's/@''GNULIB_READDIR''@/$(GL_GNULIB_READDIR)/g' \
+	      -e 's/@''GNULIB_REWINDDIR''@/$(GL_GNULIB_REWINDDIR)/g' \
+	      -e 's/@''GNULIB_CLOSEDIR''@/$(GL_GNULIB_CLOSEDIR)/g' \
+	      -e 's/@''GNULIB_DIRFD''@/$(GL_GNULIB_DIRFD)/g' \
+	      -e 's/@''GNULIB_FDOPENDIR''@/$(GL_GNULIB_FDOPENDIR)/g' \
+	      -e 's/@''GNULIB_SCANDIR''@/$(GL_GNULIB_SCANDIR)/g' \
+	      -e 's/@''GNULIB_ALPHASORT''@/$(GL_GNULIB_ALPHASORT)/g' \
+	      -e 's/@''HAVE_OPENDIR''@/$(HAVE_OPENDIR)/g' \
+	      -e 's/@''HAVE_READDIR''@/$(HAVE_READDIR)/g' \
+	      -e 's/@''HAVE_REWINDDIR''@/$(HAVE_REWINDDIR)/g' \
+	      -e 's/@''HAVE_CLOSEDIR''@/$(HAVE_CLOSEDIR)/g' \
+	      -e 's|@''HAVE_DECL_DIRFD''@|$(HAVE_DECL_DIRFD)|g' \
+	      -e 's|@''HAVE_DECL_FDOPENDIR''@|$(HAVE_DECL_FDOPENDIR)|g' \
+	      -e 's|@''HAVE_FDOPENDIR''@|$(HAVE_FDOPENDIR)|g' \
+	      -e 's|@''HAVE_SCANDIR''@|$(HAVE_SCANDIR)|g' \
+	      -e 's|@''HAVE_ALPHASORT''@|$(HAVE_ALPHASORT)|g' \
+	      -e 's|@''REPLACE_OPENDIR''@|$(REPLACE_OPENDIR)|g' \
+	      -e 's|@''REPLACE_CLOSEDIR''@|$(REPLACE_CLOSEDIR)|g' \
+	      -e 's|@''REPLACE_DIRFD''@|$(REPLACE_DIRFD)|g' \
+	      -e 's|@''REPLACE_FDOPENDIR''@|$(REPLACE_FDOPENDIR)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/dirent.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+malloc/dynarray.gl.h: malloc/dynarray.h
+	$(AM_V_at)$(MKDIR_P) malloc
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e '/libc_hidden_proto/d' < $(srcdir)/malloc/dynarray.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+malloc/dynarray-skeleton.gl.h: malloc/dynarray-skeleton.c
+	$(AM_V_at)$(MKDIR_P) malloc
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|<malloc/dynarray\.h>|<malloc/dynarray.gl.h>|g' \
+	      -e 's|__attribute_maybe_unused__|_GL_ATTRIBUTE_MAYBE_UNUSED|g' \
+	      -e 's|__attribute_nonnull__|_GL_ATTRIBUTE_NONNULL|g' \
+	      -e 's|__attribute_warn_unused_result__|_GL_ATTRIBUTE_NODISCARD|g' \
+	      -e 's|__glibc_likely|_GL_LIKELY|g' \
+	      -e 's|__glibc_unlikely|_GL_UNLIKELY|g' \
+	      < $(srcdir)/malloc/dynarray-skeleton.c; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <errno.h> when the system
+# doesn't have one that is POSIX compliant.
+@GL_GENERATE_ERRNO_H_TRUE@errno.h: errno.in.h $(top_builddir)/config.status
+@GL_GENERATE_ERRNO_H_TRUE@	$(AM_V_GEN)rm -f $@-t $@ && \
+@GL_GENERATE_ERRNO_H_TRUE@	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+@GL_GENERATE_ERRNO_H_TRUE@	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''NEXT_ERRNO_H''@|$(NEXT_ERRNO_H)|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''EMULTIHOP_HIDDEN''@|$(EMULTIHOP_HIDDEN)|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''EMULTIHOP_VALUE''@|$(EMULTIHOP_VALUE)|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''ENOLINK_HIDDEN''@|$(ENOLINK_HIDDEN)|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''ENOLINK_VALUE''@|$(ENOLINK_VALUE)|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''EOVERFLOW_HIDDEN''@|$(EOVERFLOW_HIDDEN)|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      -e 's|@''EOVERFLOW_VALUE''@|$(EOVERFLOW_VALUE)|g' \
+@GL_GENERATE_ERRNO_H_TRUE@	      < $(srcdir)/errno.in.h; \
+@GL_GENERATE_ERRNO_H_TRUE@	} > $@-t && \
+@GL_GENERATE_ERRNO_H_TRUE@	mv $@-t $@
+@GL_GENERATE_ERRNO_H_FALSE@errno.h: $(top_builddir)/config.status
+@GL_GENERATE_ERRNO_H_FALSE@	rm -f $@
+
+# We need the following in order to create <fcntl.h> when the system
+# doesn't have one that works with the given compiler.
+fcntl.h: fcntl.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_FCNTL_H''@|$(NEXT_FCNTL_H)|g' \
+	      -e 's/@''GNULIB_CREAT''@/$(GL_GNULIB_CREAT)/g' \
+	      -e 's/@''GNULIB_FCNTL''@/$(GL_GNULIB_FCNTL)/g' \
+	      -e 's/@''GNULIB_NONBLOCKING''@/$(GL_GNULIB_NONBLOCKING)/g' \
+	      -e 's/@''GNULIB_OPEN''@/$(GL_GNULIB_OPEN)/g' \
+	      -e 's/@''GNULIB_OPENAT''@/$(GL_GNULIB_OPENAT)/g' \
+	      -e 's/@''GNULIB_MDA_CREAT''@/$(GL_GNULIB_MDA_CREAT)/g' \
+	      -e 's/@''GNULIB_MDA_OPEN''@/$(GL_GNULIB_MDA_OPEN)/g' \
+	      -e 's|@''HAVE_FCNTL''@|$(HAVE_FCNTL)|g' \
+	      -e 's|@''HAVE_OPENAT''@|$(HAVE_OPENAT)|g' \
+	      -e 's|@''REPLACE_CREAT''@|$(REPLACE_CREAT)|g' \
+	      -e 's|@''REPLACE_FCNTL''@|$(REPLACE_FCNTL)|g' \
+	      -e 's|@''REPLACE_OPEN''@|$(REPLACE_OPEN)|g' \
+	      -e 's|@''REPLACE_OPENAT''@|$(REPLACE_OPENAT)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/fcntl.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <fnmatch.h>.
+@GL_GENERATE_FNMATCH_H_TRUE@fnmatch.h: fnmatch.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+@GL_GENERATE_FNMATCH_H_TRUE@	$(AM_V_GEN)rm -f $@-t $@ && \
+@GL_GENERATE_FNMATCH_H_TRUE@	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+@GL_GENERATE_FNMATCH_H_TRUE@	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+@GL_GENERATE_FNMATCH_H_TRUE@	      -e 's|@''HAVE_FNMATCH_H''@|$(HAVE_FNMATCH_H)|g' \
+@GL_GENERATE_FNMATCH_H_TRUE@	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+@GL_GENERATE_FNMATCH_H_TRUE@	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+@GL_GENERATE_FNMATCH_H_TRUE@	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+@GL_GENERATE_FNMATCH_H_TRUE@	      -e 's|@''NEXT_FNMATCH_H''@|$(NEXT_FNMATCH_H)|g' \
+@GL_GENERATE_FNMATCH_H_TRUE@	      -e 's/@''GNULIB_FNMATCH''@/$(GL_GNULIB_FNMATCH)/g' \
+@GL_GENERATE_FNMATCH_H_TRUE@	      -e 's|@''HAVE_FNMATCH''@|$(HAVE_FNMATCH)|g' \
+@GL_GENERATE_FNMATCH_H_TRUE@	      -e 's|@''REPLACE_FNMATCH''@|$(REPLACE_FNMATCH)|g' \
+@GL_GENERATE_FNMATCH_H_TRUE@	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+@GL_GENERATE_FNMATCH_H_TRUE@	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+@GL_GENERATE_FNMATCH_H_TRUE@	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+@GL_GENERATE_FNMATCH_H_TRUE@	      < $(srcdir)/fnmatch.in.h; \
+@GL_GENERATE_FNMATCH_H_TRUE@	} > $@-t && \
+@GL_GENERATE_FNMATCH_H_TRUE@	mv $@-t $@
+@GL_GENERATE_FNMATCH_H_FALSE@fnmatch.h: $(top_builddir)/config.status
+@GL_GENERATE_FNMATCH_H_FALSE@	rm -f $@
+
+# We need the following in order to create <getopt.h> when the system
+# doesn't have one that works with the given compiler.
+getopt.h: getopt.in.h $(top_builddir)/config.status $(ARG_NONNULL_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''HAVE_GETOPT_H''@|$(HAVE_GETOPT_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_GETOPT_H''@|$(NEXT_GETOPT_H)|g' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      < $(srcdir)/getopt.in.h; \
+	} > $@-t && \
+	mv -f $@-t $@
+
+getopt-cdefs.h: getopt-cdefs.in.h $(top_builddir)/config.status
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+          sed -e 's|@''HAVE_SYS_CDEFS_H''@|$(HAVE_SYS_CDEFS_H)|g' \
+	      < $(srcdir)/getopt-cdefs.in.h; \
+	} > $@-t && \
+	mv -f $@-t $@
+distclean-local: clean-GNUmakefile
+clean-GNUmakefile:
+	test '$(srcdir)' = . || rm -f $(top_builddir)/GNUmakefile
+
+# We need the following in order to create <iconv.h> when the system
+# doesn't have one that works with the given compiler.
+@GL_GENERATE_ICONV_H_TRUE@iconv.h: iconv.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+@GL_GENERATE_ICONV_H_TRUE@	$(AM_V_GEN)rm -f $@-t $@ && \
+@GL_GENERATE_ICONV_H_TRUE@	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+@GL_GENERATE_ICONV_H_TRUE@	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+@GL_GENERATE_ICONV_H_TRUE@	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+@GL_GENERATE_ICONV_H_TRUE@	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+@GL_GENERATE_ICONV_H_TRUE@	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+@GL_GENERATE_ICONV_H_TRUE@	      -e 's|@''NEXT_ICONV_H''@|$(NEXT_ICONV_H)|g' \
+@GL_GENERATE_ICONV_H_TRUE@	      -e 's/@''GNULIB_ICONV''@/$(GL_GNULIB_ICONV)/g' \
+@GL_GENERATE_ICONV_H_TRUE@	      -e 's|@''ICONV_CONST''@|$(ICONV_CONST)|g' \
+@GL_GENERATE_ICONV_H_TRUE@	      -e 's|@''REPLACE_ICONV''@|$(REPLACE_ICONV)|g' \
+@GL_GENERATE_ICONV_H_TRUE@	      -e 's|@''REPLACE_ICONV_OPEN''@|$(REPLACE_ICONV_OPEN)|g' \
+@GL_GENERATE_ICONV_H_TRUE@	      -e 's|@''REPLACE_ICONV_UTF''@|$(REPLACE_ICONV_UTF)|g' \
+@GL_GENERATE_ICONV_H_TRUE@	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+@GL_GENERATE_ICONV_H_TRUE@	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+@GL_GENERATE_ICONV_H_TRUE@	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+@GL_GENERATE_ICONV_H_TRUE@	      < $(srcdir)/iconv.in.h; \
+@GL_GENERATE_ICONV_H_TRUE@	} > $@-t && \
+@GL_GENERATE_ICONV_H_TRUE@	mv $@-t $@
+@GL_GENERATE_ICONV_H_FALSE@iconv.h: $(top_builddir)/config.status
+@GL_GENERATE_ICONV_H_FALSE@	rm -f $@
+
+$(srcdir)/iconv_open-aix.h: $(srcdir)/iconv_open-aix.gperf
+	$(V_GPERF)$(GPERF) -m 10 $(srcdir)/iconv_open-aix.gperf > $(srcdir)/iconv_open-aix.h-t && \
+	mv $(srcdir)/iconv_open-aix.h-t $(srcdir)/iconv_open-aix.h
+$(srcdir)/iconv_open-hpux.h: $(srcdir)/iconv_open-hpux.gperf
+	$(V_GPERF)$(GPERF) -m 10 $(srcdir)/iconv_open-hpux.gperf > $(srcdir)/iconv_open-hpux.h-t && \
+	mv $(srcdir)/iconv_open-hpux.h-t $(srcdir)/iconv_open-hpux.h
+$(srcdir)/iconv_open-irix.h: $(srcdir)/iconv_open-irix.gperf
+	$(V_GPERF)$(GPERF) -m 10 $(srcdir)/iconv_open-irix.gperf > $(srcdir)/iconv_open-irix.h-t && \
+	mv $(srcdir)/iconv_open-irix.h-t $(srcdir)/iconv_open-irix.h
+$(srcdir)/iconv_open-osf.h: $(srcdir)/iconv_open-osf.gperf
+	$(V_GPERF)$(GPERF) -m 10 $(srcdir)/iconv_open-osf.gperf > $(srcdir)/iconv_open-osf.h-t && \
+	mv $(srcdir)/iconv_open-osf.h-t $(srcdir)/iconv_open-osf.h
+$(srcdir)/iconv_open-solaris.h: $(srcdir)/iconv_open-solaris.gperf
+	$(V_GPERF)$(GPERF) -m 10 $(srcdir)/iconv_open-solaris.gperf > $(srcdir)/iconv_open-solaris.h-t && \
+	mv $(srcdir)/iconv_open-solaris.h-t $(srcdir)/iconv_open-solaris.h
+$(srcdir)/iconv_open-zos.h: $(srcdir)/iconv_open-zos.gperf
+	$(V_GPERF)$(GPERF) -m 10 $(srcdir)/iconv_open-zos.gperf > $(srcdir)/iconv_open-zos.h-t && \
+	mv $(srcdir)/iconv_open-zos.h-t $(srcdir)/iconv_open-zos.h
+
+# We need the following in order to create <inttypes.h> when the system
+# doesn't have one that works with the given compiler.
+inttypes.h: inttypes.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H) $(ARG_NONNULL_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's/@''HAVE_INTTYPES_H''@/$(HAVE_INTTYPES_H)/g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_INTTYPES_H''@|$(NEXT_INTTYPES_H)|g' \
+	      -e 's/@''APPLE_UNIVERSAL_BUILD''@/$(APPLE_UNIVERSAL_BUILD)/g' \
+	      -e 's/@''PRIPTR_PREFIX''@/$(PRIPTR_PREFIX)/g' \
+	      -e 's/@''GNULIB_IMAXABS''@/$(GL_GNULIB_IMAXABS)/g' \
+	      -e 's/@''GNULIB_IMAXDIV''@/$(GL_GNULIB_IMAXDIV)/g' \
+	      -e 's/@''GNULIB_STRTOIMAX''@/$(GL_GNULIB_STRTOIMAX)/g' \
+	      -e 's/@''GNULIB_STRTOUMAX''@/$(GL_GNULIB_STRTOUMAX)/g' \
+	      -e 's/@''HAVE_DECL_IMAXABS''@/$(HAVE_DECL_IMAXABS)/g' \
+	      -e 's/@''HAVE_DECL_IMAXDIV''@/$(HAVE_DECL_IMAXDIV)/g' \
+	      -e 's/@''HAVE_DECL_STRTOIMAX''@/$(HAVE_DECL_STRTOIMAX)/g' \
+	      -e 's/@''HAVE_DECL_STRTOUMAX''@/$(HAVE_DECL_STRTOUMAX)/g' \
+	      -e 's/@''HAVE_IMAXDIV_T''@/$(HAVE_IMAXDIV_T)/g' \
+	      -e 's/@''REPLACE_STRTOIMAX''@/$(REPLACE_STRTOIMAX)/g' \
+	      -e 's/@''REPLACE_STRTOUMAX''@/$(REPLACE_STRTOUMAX)/g' \
+	      -e 's/@''INT32_MAX_LT_INTMAX_MAX''@/$(INT32_MAX_LT_INTMAX_MAX)/g' \
+	      -e 's/@''INT64_MAX_EQ_LONG_MAX''@/$(INT64_MAX_EQ_LONG_MAX)/g' \
+	      -e 's/@''UINT32_MAX_LT_UINTMAX_MAX''@/$(UINT32_MAX_LT_UINTMAX_MAX)/g' \
+	      -e 's/@''UINT64_MAX_EQ_ULONG_MAX''@/$(UINT64_MAX_EQ_ULONG_MAX)/g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/inttypes.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create an empty placeholder for
+# <langinfo.h> when the system doesn't have one.
+langinfo.h: langinfo.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''HAVE_LANGINFO_H''@|$(HAVE_LANGINFO_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_LANGINFO_H''@|$(NEXT_LANGINFO_H)|g' \
+	      -e 's/@''GNULIB_NL_LANGINFO''@/$(GL_GNULIB_NL_LANGINFO)/g' \
+	      -e 's|@''HAVE_LANGINFO_CODESET''@|$(HAVE_LANGINFO_CODESET)|g' \
+	      -e 's|@''HAVE_LANGINFO_T_FMT_AMPM''@|$(HAVE_LANGINFO_T_FMT_AMPM)|g' \
+	      -e 's|@''HAVE_LANGINFO_ALTMON''@|$(HAVE_LANGINFO_ALTMON)|g' \
+	      -e 's|@''HAVE_LANGINFO_ERA''@|$(HAVE_LANGINFO_ERA)|g' \
+	      -e 's|@''HAVE_LANGINFO_YESEXPR''@|$(HAVE_LANGINFO_YESEXPR)|g' \
+	      -e 's|@''HAVE_NL_LANGINFO''@|$(HAVE_NL_LANGINFO)|g' \
+	      -e 's|@''REPLACE_NL_LANGINFO''@|$(REPLACE_NL_LANGINFO)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/langinfo.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <limits.h> when the system
+# doesn't have one that is compatible with GNU.
+@GL_GENERATE_LIMITS_H_TRUE@limits.h: limits.in.h $(top_builddir)/config.status
+@GL_GENERATE_LIMITS_H_TRUE@	$(AM_V_GEN)rm -f $@-t $@ && \
+@GL_GENERATE_LIMITS_H_TRUE@	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+@GL_GENERATE_LIMITS_H_TRUE@	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+@GL_GENERATE_LIMITS_H_TRUE@	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+@GL_GENERATE_LIMITS_H_TRUE@	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+@GL_GENERATE_LIMITS_H_TRUE@	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+@GL_GENERATE_LIMITS_H_TRUE@	      -e 's|@''NEXT_LIMITS_H''@|$(NEXT_LIMITS_H)|g' \
+@GL_GENERATE_LIMITS_H_TRUE@	      < $(srcdir)/limits.in.h; \
+@GL_GENERATE_LIMITS_H_TRUE@	} > $@-t && \
+@GL_GENERATE_LIMITS_H_TRUE@	mv $@-t $@
+@GL_GENERATE_LIMITS_H_FALSE@limits.h: $(top_builddir)/config.status
+@GL_GENERATE_LIMITS_H_FALSE@	rm -f $@
+
+# We need the following in order to create <locale.h> when the system
+# doesn't have one that provides all definitions.
+locale.h: locale.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_LOCALE_H''@|$(NEXT_LOCALE_H)|g' \
+	      -e 's/@''GNULIB_LOCALECONV''@/$(GL_GNULIB_LOCALECONV)/g' \
+	      -e 's/@''GNULIB_SETLOCALE''@/$(GL_GNULIB_SETLOCALE)/g' \
+	      -e 's/@''GNULIB_SETLOCALE_NULL''@/$(GL_GNULIB_SETLOCALE_NULL)/g' \
+	      -e 's/@''GNULIB_DUPLOCALE''@/$(GL_GNULIB_DUPLOCALE)/g' \
+	      -e 's/@''GNULIB_LOCALENAME''@/$(GL_GNULIB_LOCALENAME)/g' \
+	      -e 's|@''HAVE_NEWLOCALE''@|$(HAVE_NEWLOCALE)|g' \
+	      -e 's|@''HAVE_DUPLOCALE''@|$(HAVE_DUPLOCALE)|g' \
+	      -e 's|@''HAVE_FREELOCALE''@|$(HAVE_FREELOCALE)|g' \
+	      -e 's|@''HAVE_XLOCALE_H''@|$(HAVE_XLOCALE_H)|g' \
+	      -e 's|@''REPLACE_LOCALECONV''@|$(REPLACE_LOCALECONV)|g' \
+	      -e 's|@''REPLACE_SETLOCALE''@|$(REPLACE_SETLOCALE)|g' \
+	      -e 's|@''REPLACE_NEWLOCALE''@|$(REPLACE_NEWLOCALE)|g' \
+	      -e 's|@''REPLACE_DUPLOCALE''@|$(REPLACE_DUPLOCALE)|g' \
+	      -e 's|@''REPLACE_FREELOCALE''@|$(REPLACE_FREELOCALE)|g' \
+	      -e 's|@''REPLACE_STRUCT_LCONV''@|$(REPLACE_STRUCT_LCONV)|g' \
+	      -e 's|@''LOCALENAME_ENHANCE_LOCALE_FUNCS''@|$(LOCALENAME_ENHANCE_LOCALE_FUNCS)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/locale.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <signal.h> when the system
+# doesn't have a complete one.
+signal.h: signal.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SIGNAL_H''@|$(NEXT_SIGNAL_H)|g' \
+	      -e 's/@''GNULIB_PTHREAD_SIGMASK''@/$(GL_GNULIB_PTHREAD_SIGMASK)/g' \
+	      -e 's/@''GNULIB_RAISE''@/$(GL_GNULIB_RAISE)/g' \
+	      -e 's/@''GNULIB_SIGNAL_H_SIGPIPE''@/$(GL_GNULIB_SIGNAL_H_SIGPIPE)/g' \
+	      -e 's/@''GNULIB_SIGPROCMASK''@/$(GL_GNULIB_SIGPROCMASK)/g' \
+	      -e 's/@''GNULIB_SIGACTION''@/$(GL_GNULIB_SIGACTION)/g' \
+	      -e 's|@''HAVE_POSIX_SIGNALBLOCKING''@|$(HAVE_POSIX_SIGNALBLOCKING)|g' \
+	      -e 's|@''HAVE_PTHREAD_SIGMASK''@|$(HAVE_PTHREAD_SIGMASK)|g' \
+	      -e 's|@''HAVE_RAISE''@|$(HAVE_RAISE)|g' \
+	      -e 's|@''HAVE_SIGSET_T''@|$(HAVE_SIGSET_T)|g' \
+	      -e 's|@''HAVE_SIGINFO_T''@|$(HAVE_SIGINFO_T)|g' \
+	      -e 's|@''HAVE_SIGACTION''@|$(HAVE_SIGACTION)|g' \
+	      -e 's|@''HAVE_STRUCT_SIGACTION_SA_SIGACTION''@|$(HAVE_STRUCT_SIGACTION_SA_SIGACTION)|g' \
+	      -e 's|@''HAVE_TYPE_VOLATILE_SIG_ATOMIC_T''@|$(HAVE_TYPE_VOLATILE_SIG_ATOMIC_T)|g' \
+	      -e 's|@''HAVE_SIGHANDLER_T''@|$(HAVE_SIGHANDLER_T)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SIGMASK''@|$(REPLACE_PTHREAD_SIGMASK)|g' \
+	      -e 's|@''REPLACE_RAISE''@|$(REPLACE_RAISE)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/signal.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+@GL_GENERATE_SIGSEGV_H_TRUE@sigsegv.h: sigsegv.in.h $(top_builddir)/config.status
+@GL_GENERATE_SIGSEGV_H_TRUE@	$(AM_V_GEN)rm -f $@-t $@ && \
+@GL_GENERATE_SIGSEGV_H_TRUE@	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+@GL_GENERATE_SIGSEGV_H_TRUE@	  cat $(srcdir)/sigsegv.in.h; \
+@GL_GENERATE_SIGSEGV_H_TRUE@	} > $@-t && \
+@GL_GENERATE_SIGSEGV_H_TRUE@	mv $@-t $@
+@GL_GENERATE_SIGSEGV_H_FALSE@sigsegv.h: $(top_builddir)/config.status
+@GL_GENERATE_SIGSEGV_H_FALSE@	rm -f $@
+
+# We need the following in order to create <stdalign.h> when the system
+# doesn't have one that works.
+@GL_GENERATE_STDALIGN_H_TRUE@stdalign.h: stdalign.in.h $(top_builddir)/config.status
+@GL_GENERATE_STDALIGN_H_TRUE@	$(AM_V_GEN)rm -f $@-t $@ && \
+@GL_GENERATE_STDALIGN_H_TRUE@	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+@GL_GENERATE_STDALIGN_H_TRUE@	  cat $(srcdir)/stdalign.in.h; \
+@GL_GENERATE_STDALIGN_H_TRUE@	} > $@-t && \
+@GL_GENERATE_STDALIGN_H_TRUE@	mv $@-t $@
+@GL_GENERATE_STDALIGN_H_FALSE@stdalign.h: $(top_builddir)/config.status
+@GL_GENERATE_STDALIGN_H_FALSE@	rm -f $@
+
+# We need the following in order to create <stdarg.h> when the system
+# doesn't have one that works with the given compiler.
+@GL_GENERATE_STDARG_H_TRUE@stdarg.h: stdarg.in.h $(top_builddir)/config.status
+@GL_GENERATE_STDARG_H_TRUE@	$(AM_V_GEN)rm -f $@-t $@ && \
+@GL_GENERATE_STDARG_H_TRUE@	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+@GL_GENERATE_STDARG_H_TRUE@	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+@GL_GENERATE_STDARG_H_TRUE@	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+@GL_GENERATE_STDARG_H_TRUE@	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+@GL_GENERATE_STDARG_H_TRUE@	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+@GL_GENERATE_STDARG_H_TRUE@	      -e 's|@''NEXT_STDARG_H''@|$(NEXT_STDARG_H)|g' \
+@GL_GENERATE_STDARG_H_TRUE@	      < $(srcdir)/stdarg.in.h; \
+@GL_GENERATE_STDARG_H_TRUE@	} > $@-t && \
+@GL_GENERATE_STDARG_H_TRUE@	mv $@-t $@
+@GL_GENERATE_STDARG_H_FALSE@stdarg.h: $(top_builddir)/config.status
+@GL_GENERATE_STDARG_H_FALSE@	rm -f $@
+
+# We need the following in order to create <stdbool.h> when the system
+# doesn't have one that works.
+@GL_GENERATE_STDBOOL_H_TRUE@stdbool.h: stdbool.in.h $(top_builddir)/config.status
+@GL_GENERATE_STDBOOL_H_TRUE@	$(AM_V_GEN)rm -f $@-t $@ && \
+@GL_GENERATE_STDBOOL_H_TRUE@	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+@GL_GENERATE_STDBOOL_H_TRUE@	  sed -e 's/@''HAVE__BOOL''@/$(HAVE__BOOL)/g' < $(srcdir)/stdbool.in.h; \
+@GL_GENERATE_STDBOOL_H_TRUE@	} > $@-t && \
+@GL_GENERATE_STDBOOL_H_TRUE@	mv $@-t $@
+@GL_GENERATE_STDBOOL_H_FALSE@stdbool.h: $(top_builddir)/config.status
+@GL_GENERATE_STDBOOL_H_FALSE@	rm -f $@
+
+# We need the following in order to create <stddef.h> when the system
+# doesn't have one that works with the given compiler.
+@GL_GENERATE_STDDEF_H_TRUE@stddef.h: stddef.in.h $(top_builddir)/config.status
+@GL_GENERATE_STDDEF_H_TRUE@	$(AM_V_GEN)rm -f $@-t $@ && \
+@GL_GENERATE_STDDEF_H_TRUE@	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+@GL_GENERATE_STDDEF_H_TRUE@	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+@GL_GENERATE_STDDEF_H_TRUE@	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+@GL_GENERATE_STDDEF_H_TRUE@	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+@GL_GENERATE_STDDEF_H_TRUE@	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+@GL_GENERATE_STDDEF_H_TRUE@	      -e 's|@''NEXT_STDDEF_H''@|$(NEXT_STDDEF_H)|g' \
+@GL_GENERATE_STDDEF_H_TRUE@	      -e 's|@''HAVE_MAX_ALIGN_T''@|$(HAVE_MAX_ALIGN_T)|g' \
+@GL_GENERATE_STDDEF_H_TRUE@	      -e 's|@''HAVE_WCHAR_T''@|$(HAVE_WCHAR_T)|g' \
+@GL_GENERATE_STDDEF_H_TRUE@	      -e 's|@''REPLACE_NULL''@|$(REPLACE_NULL)|g' \
+@GL_GENERATE_STDDEF_H_TRUE@	      < $(srcdir)/stddef.in.h; \
+@GL_GENERATE_STDDEF_H_TRUE@	} > $@-t && \
+@GL_GENERATE_STDDEF_H_TRUE@	mv $@-t $@
+@GL_GENERATE_STDDEF_H_FALSE@stddef.h: $(top_builddir)/config.status
+@GL_GENERATE_STDDEF_H_FALSE@	rm -f $@
+
+# We need the following in order to create <stdint.h> when the system
+# doesn't have one that works with the given compiler.
+@GL_GENERATE_STDINT_H_TRUE@stdint.h: stdint.in.h $(top_builddir)/config.status
+@GL_GENERATE_STDINT_H_TRUE@	$(AM_V_GEN)rm -f $@-t $@ && \
+@GL_GENERATE_STDINT_H_TRUE@	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+@GL_GENERATE_STDINT_H_TRUE@	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''HAVE_STDINT_H''@/$(HAVE_STDINT_H)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's|@''NEXT_STDINT_H''@|$(NEXT_STDINT_H)|g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''HAVE_C99_STDINT_H''@/$(HAVE_C99_STDINT_H)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''HAVE_SYS_TYPES_H''@/$(HAVE_SYS_TYPES_H)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''HAVE_INTTYPES_H''@/$(HAVE_INTTYPES_H)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''HAVE_SYS_INTTYPES_H''@/$(HAVE_SYS_INTTYPES_H)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''HAVE_SYS_BITYPES_H''@/$(HAVE_SYS_BITYPES_H)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''HAVE_WCHAR_H''@/$(HAVE_WCHAR_H)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''APPLE_UNIVERSAL_BUILD''@/$(APPLE_UNIVERSAL_BUILD)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''BITSIZEOF_PTRDIFF_T''@/$(BITSIZEOF_PTRDIFF_T)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''PTRDIFF_T_SUFFIX''@/$(PTRDIFF_T_SUFFIX)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''BITSIZEOF_SIG_ATOMIC_T''@/$(BITSIZEOF_SIG_ATOMIC_T)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''HAVE_SIGNED_SIG_ATOMIC_T''@/$(HAVE_SIGNED_SIG_ATOMIC_T)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''SIG_ATOMIC_T_SUFFIX''@/$(SIG_ATOMIC_T_SUFFIX)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''BITSIZEOF_SIZE_T''@/$(BITSIZEOF_SIZE_T)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''SIZE_T_SUFFIX''@/$(SIZE_T_SUFFIX)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''BITSIZEOF_WCHAR_T''@/$(BITSIZEOF_WCHAR_T)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''HAVE_SIGNED_WCHAR_T''@/$(HAVE_SIGNED_WCHAR_T)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''WCHAR_T_SUFFIX''@/$(WCHAR_T_SUFFIX)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''BITSIZEOF_WINT_T''@/$(BITSIZEOF_WINT_T)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''HAVE_SIGNED_WINT_T''@/$(HAVE_SIGNED_WINT_T)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''WINT_T_SUFFIX''@/$(WINT_T_SUFFIX)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      -e 's/@''GNULIBHEADERS_OVERRIDE_WINT_T''@/$(GNULIBHEADERS_OVERRIDE_WINT_T)/g' \
+@GL_GENERATE_STDINT_H_TRUE@	      < $(srcdir)/stdint.in.h; \
+@GL_GENERATE_STDINT_H_TRUE@	} > $@-t && \
+@GL_GENERATE_STDINT_H_TRUE@	mv $@-t $@
+@GL_GENERATE_STDINT_H_FALSE@stdint.h: $(top_builddir)/config.status
+@GL_GENERATE_STDINT_H_FALSE@	rm -f $@
+
+# We need the following in order to create <stdio.h> when the system
+# doesn't have one that works with the given compiler.
+stdio.h: stdio.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_STDIO_H''@|$(NEXT_STDIO_H)|g' \
+	      -e 's/@''GNULIB_DPRINTF''@/$(GL_GNULIB_DPRINTF)/g' \
+	      -e 's/@''GNULIB_FCLOSE''@/$(GL_GNULIB_FCLOSE)/g' \
+	      -e 's/@''GNULIB_FDOPEN''@/$(GL_GNULIB_FDOPEN)/g' \
+	      -e 's/@''GNULIB_FFLUSH''@/$(GL_GNULIB_FFLUSH)/g' \
+	      -e 's/@''GNULIB_FGETC''@/$(GL_GNULIB_FGETC)/g' \
+	      -e 's/@''GNULIB_FGETS''@/$(GL_GNULIB_FGETS)/g' \
+	      -e 's/@''GNULIB_FOPEN''@/$(GL_GNULIB_FOPEN)/g' \
+	      -e 's/@''GNULIB_FPRINTF''@/$(GL_GNULIB_FPRINTF)/g' \
+	      -e 's/@''GNULIB_FPRINTF_POSIX''@/$(GL_GNULIB_FPRINTF_POSIX)/g' \
+	      -e 's/@''GNULIB_FPURGE''@/$(GL_GNULIB_FPURGE)/g' \
+	      -e 's/@''GNULIB_FPUTC''@/$(GL_GNULIB_FPUTC)/g' \
+	      -e 's/@''GNULIB_FPUTS''@/$(GL_GNULIB_FPUTS)/g' \
+	      -e 's/@''GNULIB_FREAD''@/$(GL_GNULIB_FREAD)/g' \
+	      -e 's/@''GNULIB_FREOPEN''@/$(GL_GNULIB_FREOPEN)/g' \
+	      -e 's/@''GNULIB_FSCANF''@/$(GL_GNULIB_FSCANF)/g' \
+	      -e 's/@''GNULIB_FSEEK''@/$(GL_GNULIB_FSEEK)/g' \
+	      -e 's/@''GNULIB_FSEEKO''@/$(GL_GNULIB_FSEEKO)/g' \
+	      -e 's/@''GNULIB_FTELL''@/$(GL_GNULIB_FTELL)/g' \
+	      -e 's/@''GNULIB_FTELLO''@/$(GL_GNULIB_FTELLO)/g' \
+	      -e 's/@''GNULIB_FWRITE''@/$(GL_GNULIB_FWRITE)/g' \
+	      -e 's/@''GNULIB_GETC''@/$(GL_GNULIB_GETC)/g' \
+	      -e 's/@''GNULIB_GETCHAR''@/$(GL_GNULIB_GETCHAR)/g' \
+	      -e 's/@''GNULIB_GETDELIM''@/$(GL_GNULIB_GETDELIM)/g' \
+	      -e 's/@''GNULIB_GETLINE''@/$(GL_GNULIB_GETLINE)/g' \
+	      -e 's/@''GNULIB_OBSTACK_PRINTF''@/$(GL_GNULIB_OBSTACK_PRINTF)/g' \
+	      -e 's/@''GNULIB_OBSTACK_PRINTF_POSIX''@/$(GL_GNULIB_OBSTACK_PRINTF_POSIX)/g' \
+	      -e 's/@''GNULIB_PCLOSE''@/$(GL_GNULIB_PCLOSE)/g' \
+	      -e 's/@''GNULIB_PERROR''@/$(GL_GNULIB_PERROR)/g' \
+	      -e 's/@''GNULIB_POPEN''@/$(GL_GNULIB_POPEN)/g' \
+	      -e 's/@''GNULIB_PRINTF''@/$(GL_GNULIB_PRINTF)/g' \
+	      -e 's/@''GNULIB_PRINTF_POSIX''@/$(GL_GNULIB_PRINTF_POSIX)/g' \
+	      -e 's/@''GNULIB_PUTC''@/$(GL_GNULIB_PUTC)/g' \
+	      -e 's/@''GNULIB_PUTCHAR''@/$(GL_GNULIB_PUTCHAR)/g' \
+	      -e 's/@''GNULIB_PUTS''@/$(GL_GNULIB_PUTS)/g' \
+	      -e 's/@''GNULIB_REMOVE''@/$(GL_GNULIB_REMOVE)/g' \
+	      -e 's/@''GNULIB_RENAME''@/$(GL_GNULIB_RENAME)/g' \
+	      -e 's/@''GNULIB_RENAMEAT''@/$(GL_GNULIB_RENAMEAT)/g' \
+	      -e 's/@''GNULIB_SCANF''@/$(GL_GNULIB_SCANF)/g' \
+	      -e 's/@''GNULIB_SNPRINTF''@/$(GL_GNULIB_SNPRINTF)/g' \
+	      -e 's/@''GNULIB_SPRINTF_POSIX''@/$(GL_GNULIB_SPRINTF_POSIX)/g' \
+	      -e 's/@''GNULIB_STDIO_H_NONBLOCKING''@/$(GL_GNULIB_STDIO_H_NONBLOCKING)/g' \
+	      -e 's/@''GNULIB_STDIO_H_SIGPIPE''@/$(GL_GNULIB_STDIO_H_SIGPIPE)/g' \
+	      -e 's/@''GNULIB_TMPFILE''@/$(GL_GNULIB_TMPFILE)/g' \
+	      -e 's/@''GNULIB_VASPRINTF''@/$(GL_GNULIB_VASPRINTF)/g' \
+	      -e 's/@''GNULIB_VDPRINTF''@/$(GL_GNULIB_VDPRINTF)/g' \
+	      -e 's/@''GNULIB_VFPRINTF''@/$(GL_GNULIB_VFPRINTF)/g' \
+	      -e 's/@''GNULIB_VFPRINTF_POSIX''@/$(GL_GNULIB_VFPRINTF_POSIX)/g' \
+	      -e 's/@''GNULIB_VFSCANF''@/$(GL_GNULIB_VFSCANF)/g' \
+	      -e 's/@''GNULIB_VSCANF''@/$(GL_GNULIB_VSCANF)/g' \
+	      -e 's/@''GNULIB_VPRINTF''@/$(GL_GNULIB_VPRINTF)/g' \
+	      -e 's/@''GNULIB_VPRINTF_POSIX''@/$(GL_GNULIB_VPRINTF_POSIX)/g' \
+	      -e 's/@''GNULIB_VSNPRINTF''@/$(GL_GNULIB_VSNPRINTF)/g' \
+	      -e 's/@''GNULIB_VSPRINTF_POSIX''@/$(GL_GNULIB_VSPRINTF_POSIX)/g' \
+	      -e 's/@''GNULIB_MDA_FCLOSEALL''@/$(GL_GNULIB_MDA_FCLOSEALL)/g' \
+	      -e 's/@''GNULIB_MDA_FDOPEN''@/$(GL_GNULIB_MDA_FDOPEN)/g' \
+	      -e 's/@''GNULIB_MDA_FILENO''@/$(GL_GNULIB_MDA_FILENO)/g' \
+	      -e 's/@''GNULIB_MDA_GETW''@/$(GL_GNULIB_MDA_GETW)/g' \
+	      -e 's/@''GNULIB_MDA_PUTW''@/$(GL_GNULIB_MDA_PUTW)/g' \
+	      -e 's/@''GNULIB_MDA_TEMPNAM''@/$(GL_GNULIB_MDA_TEMPNAM)/g' \
+	      < $(srcdir)/stdio.in.h | \
+	  sed -e 's|@''HAVE_DECL_FCLOSEALL''@|$(HAVE_DECL_FCLOSEALL)|g' \
+	      -e 's|@''HAVE_DECL_FPURGE''@|$(HAVE_DECL_FPURGE)|g' \
+	      -e 's|@''HAVE_DECL_FSEEKO''@|$(HAVE_DECL_FSEEKO)|g' \
+	      -e 's|@''HAVE_DECL_FTELLO''@|$(HAVE_DECL_FTELLO)|g' \
+	      -e 's|@''HAVE_DECL_GETDELIM''@|$(HAVE_DECL_GETDELIM)|g' \
+	      -e 's|@''HAVE_DECL_GETLINE''@|$(HAVE_DECL_GETLINE)|g' \
+	      -e 's|@''HAVE_DECL_OBSTACK_PRINTF''@|$(HAVE_DECL_OBSTACK_PRINTF)|g' \
+	      -e 's|@''HAVE_DECL_SNPRINTF''@|$(HAVE_DECL_SNPRINTF)|g' \
+	      -e 's|@''HAVE_DECL_VSNPRINTF''@|$(HAVE_DECL_VSNPRINTF)|g' \
+	      -e 's|@''HAVE_DPRINTF''@|$(HAVE_DPRINTF)|g' \
+	      -e 's|@''HAVE_FSEEKO''@|$(HAVE_FSEEKO)|g' \
+	      -e 's|@''HAVE_FTELLO''@|$(HAVE_FTELLO)|g' \
+	      -e 's|@''HAVE_PCLOSE''@|$(HAVE_PCLOSE)|g' \
+	      -e 's|@''HAVE_POPEN''@|$(HAVE_POPEN)|g' \
+	      -e 's|@''HAVE_RENAMEAT''@|$(HAVE_RENAMEAT)|g' \
+	      -e 's|@''HAVE_VASPRINTF''@|$(HAVE_VASPRINTF)|g' \
+	      -e 's|@''HAVE_VDPRINTF''@|$(HAVE_VDPRINTF)|g' \
+	      -e 's|@''REPLACE_DPRINTF''@|$(REPLACE_DPRINTF)|g' \
+	      -e 's|@''REPLACE_FCLOSE''@|$(REPLACE_FCLOSE)|g' \
+	      -e 's|@''REPLACE_FDOPEN''@|$(REPLACE_FDOPEN)|g' \
+	      -e 's|@''REPLACE_FFLUSH''@|$(REPLACE_FFLUSH)|g' \
+	      -e 's|@''REPLACE_FOPEN''@|$(REPLACE_FOPEN)|g' \
+	      -e 's|@''REPLACE_FPRINTF''@|$(REPLACE_FPRINTF)|g' \
+	      -e 's|@''REPLACE_FPURGE''@|$(REPLACE_FPURGE)|g' \
+	      -e 's|@''REPLACE_FREOPEN''@|$(REPLACE_FREOPEN)|g' \
+	      -e 's|@''REPLACE_FSEEK''@|$(REPLACE_FSEEK)|g' \
+	      -e 's|@''REPLACE_FSEEKO''@|$(REPLACE_FSEEKO)|g' \
+	      -e 's|@''REPLACE_FTELL''@|$(REPLACE_FTELL)|g' \
+	      -e 's|@''REPLACE_FTELLO''@|$(REPLACE_FTELLO)|g' \
+	      -e 's|@''REPLACE_GETDELIM''@|$(REPLACE_GETDELIM)|g' \
+	      -e 's|@''REPLACE_GETLINE''@|$(REPLACE_GETLINE)|g' \
+	      -e 's|@''REPLACE_OBSTACK_PRINTF''@|$(REPLACE_OBSTACK_PRINTF)|g' \
+	      -e 's|@''REPLACE_PERROR''@|$(REPLACE_PERROR)|g' \
+	      -e 's|@''REPLACE_POPEN''@|$(REPLACE_POPEN)|g' \
+	      -e 's|@''REPLACE_PRINTF''@|$(REPLACE_PRINTF)|g' \
+	      -e 's|@''REPLACE_REMOVE''@|$(REPLACE_REMOVE)|g' \
+	      -e 's|@''REPLACE_RENAME''@|$(REPLACE_RENAME)|g' \
+	      -e 's|@''REPLACE_RENAMEAT''@|$(REPLACE_RENAMEAT)|g' \
+	      -e 's|@''REPLACE_SNPRINTF''@|$(REPLACE_SNPRINTF)|g' \
+	      -e 's|@''REPLACE_SPRINTF''@|$(REPLACE_SPRINTF)|g' \
+	      -e 's|@''REPLACE_STDIO_READ_FUNCS''@|$(REPLACE_STDIO_READ_FUNCS)|g' \
+	      -e 's|@''REPLACE_STDIO_WRITE_FUNCS''@|$(REPLACE_STDIO_WRITE_FUNCS)|g' \
+	      -e 's|@''REPLACE_TMPFILE''@|$(REPLACE_TMPFILE)|g' \
+	      -e 's|@''REPLACE_VASPRINTF''@|$(REPLACE_VASPRINTF)|g' \
+	      -e 's|@''REPLACE_VDPRINTF''@|$(REPLACE_VDPRINTF)|g' \
+	      -e 's|@''REPLACE_VFPRINTF''@|$(REPLACE_VFPRINTF)|g' \
+	      -e 's|@''REPLACE_VPRINTF''@|$(REPLACE_VPRINTF)|g' \
+	      -e 's|@''REPLACE_VSNPRINTF''@|$(REPLACE_VSNPRINTF)|g' \
+	      -e 's|@''REPLACE_VSPRINTF''@|$(REPLACE_VSPRINTF)|g' \
+	      -e 's|@''ASM_SYMBOL_PREFIX''@|$(ASM_SYMBOL_PREFIX)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)'; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <stdlib.h> when the system
+# doesn't have one that works with the given compiler.
+stdlib.h: stdlib.in.h $(top_builddir)/config.status $(CXXDEFS_H) \
+  $(_NORETURN_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_STDLIB_H''@|$(NEXT_STDLIB_H)|g' \
+	      -e 's/@''GNULIB__EXIT''@/$(GL_GNULIB__EXIT)/g' \
+	      -e 's/@''GNULIB_ALIGNED_ALLOC''@/$(GL_GNULIB_ALIGNED_ALLOC)/g' \
+	      -e 's/@''GNULIB_ATOLL''@/$(GL_GNULIB_ATOLL)/g' \
+	      -e 's/@''GNULIB_CALLOC_POSIX''@/$(GL_GNULIB_CALLOC_POSIX)/g' \
+	      -e 's/@''GNULIB_CANONICALIZE_FILE_NAME''@/$(GL_GNULIB_CANONICALIZE_FILE_NAME)/g' \
+	      -e 's/@''GNULIB_FREE_POSIX''@/$(GL_GNULIB_FREE_POSIX)/g' \
+	      -e 's/@''GNULIB_GETLOADAVG''@/$(GL_GNULIB_GETLOADAVG)/g' \
+	      -e 's/@''GNULIB_GETSUBOPT''@/$(GL_GNULIB_GETSUBOPT)/g' \
+	      -e 's/@''GNULIB_GRANTPT''@/$(GL_GNULIB_GRANTPT)/g' \
+	      -e 's/@''GNULIB_MALLOC_POSIX''@/$(GL_GNULIB_MALLOC_POSIX)/g' \
+	      -e 's/@''GNULIB_MBTOWC''@/$(GL_GNULIB_MBTOWC)/g' \
+	      -e 's/@''GNULIB_MKDTEMP''@/$(GL_GNULIB_MKDTEMP)/g' \
+	      -e 's/@''GNULIB_MKOSTEMP''@/$(GL_GNULIB_MKOSTEMP)/g' \
+	      -e 's/@''GNULIB_MKOSTEMPS''@/$(GL_GNULIB_MKOSTEMPS)/g' \
+	      -e 's/@''GNULIB_MKSTEMP''@/$(GL_GNULIB_MKSTEMP)/g' \
+	      -e 's/@''GNULIB_MKSTEMPS''@/$(GL_GNULIB_MKSTEMPS)/g' \
+	      -e 's/@''GNULIB_POSIX_MEMALIGN''@/$(GL_GNULIB_POSIX_MEMALIGN)/g' \
+	      -e 's/@''GNULIB_POSIX_OPENPT''@/$(GL_GNULIB_POSIX_OPENPT)/g' \
+	      -e 's/@''GNULIB_PTSNAME''@/$(GL_GNULIB_PTSNAME)/g' \
+	      -e 's/@''GNULIB_PTSNAME_R''@/$(GL_GNULIB_PTSNAME_R)/g' \
+	      -e 's/@''GNULIB_PUTENV''@/$(GL_GNULIB_PUTENV)/g' \
+	      -e 's/@''GNULIB_QSORT_R''@/$(GL_GNULIB_QSORT_R)/g' \
+	      -e 's/@''GNULIB_RANDOM''@/$(GL_GNULIB_RANDOM)/g' \
+	      -e 's/@''GNULIB_RANDOM_R''@/$(GL_GNULIB_RANDOM_R)/g' \
+	      -e 's/@''GNULIB_REALLOC_POSIX''@/$(GL_GNULIB_REALLOC_POSIX)/g' \
+	      -e 's/@''GNULIB_REALLOCARRAY''@/$(GL_GNULIB_REALLOCARRAY)/g' \
+	      -e 's/@''GNULIB_REALPATH''@/$(GL_GNULIB_REALPATH)/g' \
+	      -e 's/@''GNULIB_RPMATCH''@/$(GL_GNULIB_RPMATCH)/g' \
+	      -e 's/@''GNULIB_SECURE_GETENV''@/$(GL_GNULIB_SECURE_GETENV)/g' \
+	      -e 's/@''GNULIB_SETENV''@/$(GL_GNULIB_SETENV)/g' \
+	      -e 's/@''GNULIB_STRTOD''@/$(GL_GNULIB_STRTOD)/g' \
+	      -e 's/@''GNULIB_STRTOL''@/$(GL_GNULIB_STRTOL)/g' \
+	      -e 's/@''GNULIB_STRTOLD''@/$(GL_GNULIB_STRTOLD)/g' \
+	      -e 's/@''GNULIB_STRTOLL''@/$(GL_GNULIB_STRTOLL)/g' \
+	      -e 's/@''GNULIB_STRTOUL''@/$(GL_GNULIB_STRTOUL)/g' \
+	      -e 's/@''GNULIB_STRTOULL''@/$(GL_GNULIB_STRTOULL)/g' \
+	      -e 's/@''GNULIB_SYSTEM_POSIX''@/$(GL_GNULIB_SYSTEM_POSIX)/g' \
+	      -e 's/@''GNULIB_UNLOCKPT''@/$(GL_GNULIB_UNLOCKPT)/g' \
+	      -e 's/@''GNULIB_UNSETENV''@/$(GL_GNULIB_UNSETENV)/g' \
+	      -e 's/@''GNULIB_WCTOMB''@/$(GL_GNULIB_WCTOMB)/g' \
+	      -e 's/@''GNULIB_MDA_ECVT''@/$(GL_GNULIB_MDA_ECVT)/g' \
+	      -e 's/@''GNULIB_MDA_FCVT''@/$(GL_GNULIB_MDA_FCVT)/g' \
+	      -e 's/@''GNULIB_MDA_GCVT''@/$(GL_GNULIB_MDA_GCVT)/g' \
+	      -e 's/@''GNULIB_MDA_MKTEMP''@/$(GL_GNULIB_MDA_MKTEMP)/g' \
+	      -e 's/@''GNULIB_MDA_PUTENV''@/$(GL_GNULIB_MDA_PUTENV)/g' \
+	      < $(srcdir)/stdlib.in.h | \
+	  sed -e 's|@''HAVE__EXIT''@|$(HAVE__EXIT)|g' \
+	      -e 's|@''HAVE_ALIGNED_ALLOC''@|$(HAVE_ALIGNED_ALLOC)|g' \
+	      -e 's|@''HAVE_ATOLL''@|$(HAVE_ATOLL)|g' \
+	      -e 's|@''HAVE_CANONICALIZE_FILE_NAME''@|$(HAVE_CANONICALIZE_FILE_NAME)|g' \
+	      -e 's|@''HAVE_DECL_ECVT''@|$(HAVE_DECL_ECVT)|g' \
+	      -e 's|@''HAVE_DECL_FCVT''@|$(HAVE_DECL_FCVT)|g' \
+	      -e 's|@''HAVE_DECL_GCVT''@|$(HAVE_DECL_GCVT)|g' \
+	      -e 's|@''HAVE_DECL_GETLOADAVG''@|$(HAVE_DECL_GETLOADAVG)|g' \
+	      -e 's|@''HAVE_GETSUBOPT''@|$(HAVE_GETSUBOPT)|g' \
+	      -e 's|@''HAVE_GRANTPT''@|$(HAVE_GRANTPT)|g' \
+	      -e 's|@''HAVE_INITSTATE''@|$(HAVE_INITSTATE)|g' \
+	      -e 's|@''HAVE_DECL_INITSTATE''@|$(HAVE_DECL_INITSTATE)|g' \
+	      -e 's|@''HAVE_MBTOWC''@|$(HAVE_MBTOWC)|g' \
+	      -e 's|@''HAVE_MKDTEMP''@|$(HAVE_MKDTEMP)|g' \
+	      -e 's|@''HAVE_MKOSTEMP''@|$(HAVE_MKOSTEMP)|g' \
+	      -e 's|@''HAVE_MKOSTEMPS''@|$(HAVE_MKOSTEMPS)|g' \
+	      -e 's|@''HAVE_MKSTEMP''@|$(HAVE_MKSTEMP)|g' \
+	      -e 's|@''HAVE_MKSTEMPS''@|$(HAVE_MKSTEMPS)|g' \
+	      -e 's|@''HAVE_POSIX_MEMALIGN''@|$(HAVE_POSIX_MEMALIGN)|g' \
+	      -e 's|@''HAVE_POSIX_OPENPT''@|$(HAVE_POSIX_OPENPT)|g' \
+	      -e 's|@''HAVE_PTSNAME''@|$(HAVE_PTSNAME)|g' \
+	      -e 's|@''HAVE_PTSNAME_R''@|$(HAVE_PTSNAME_R)|g' \
+	      -e 's|@''HAVE_QSORT_R''@|$(HAVE_QSORT_R)|g' \
+	      -e 's|@''HAVE_RANDOM''@|$(HAVE_RANDOM)|g' \
+	      -e 's|@''HAVE_RANDOM_H''@|$(HAVE_RANDOM_H)|g' \
+	      -e 's|@''HAVE_RANDOM_R''@|$(HAVE_RANDOM_R)|g' \
+	      -e 's|@''HAVE_REALLOCARRAY''@|$(HAVE_REALLOCARRAY)|g' \
+	      -e 's|@''HAVE_REALPATH''@|$(HAVE_REALPATH)|g' \
+	      -e 's|@''HAVE_RPMATCH''@|$(HAVE_RPMATCH)|g' \
+	      -e 's|@''HAVE_SECURE_GETENV''@|$(HAVE_SECURE_GETENV)|g' \
+	      -e 's|@''HAVE_DECL_SETENV''@|$(HAVE_DECL_SETENV)|g' \
+	      -e 's|@''HAVE_SETSTATE''@|$(HAVE_SETSTATE)|g' \
+	      -e 's|@''HAVE_DECL_SETSTATE''@|$(HAVE_DECL_SETSTATE)|g' \
+	      -e 's|@''HAVE_STRTOD''@|$(HAVE_STRTOD)|g' \
+	      -e 's|@''HAVE_STRTOL''@|$(HAVE_STRTOL)|g' \
+	      -e 's|@''HAVE_STRTOLD''@|$(HAVE_STRTOLD)|g' \
+	      -e 's|@''HAVE_STRTOLL''@|$(HAVE_STRTOLL)|g' \
+	      -e 's|@''HAVE_STRTOUL''@|$(HAVE_STRTOUL)|g' \
+	      -e 's|@''HAVE_STRTOULL''@|$(HAVE_STRTOULL)|g' \
+	      -e 's|@''HAVE_STRUCT_RANDOM_DATA''@|$(HAVE_STRUCT_RANDOM_DATA)|g' \
+	      -e 's|@''HAVE_SYS_LOADAVG_H''@|$(HAVE_SYS_LOADAVG_H)|g' \
+	      -e 's|@''HAVE_UNLOCKPT''@|$(HAVE_UNLOCKPT)|g' \
+	      -e 's|@''HAVE_DECL_UNSETENV''@|$(HAVE_DECL_UNSETENV)|g' \
+	      -e 's|@''REPLACE_ALIGNED_ALLOC''@|$(REPLACE_ALIGNED_ALLOC)|g' \
+	      -e 's|@''REPLACE_CALLOC''@|$(REPLACE_CALLOC)|g' \
+	      -e 's|@''REPLACE_CANONICALIZE_FILE_NAME''@|$(REPLACE_CANONICALIZE_FILE_NAME)|g' \
+	      -e 's|@''REPLACE_FREE''@|$(REPLACE_FREE)|g' \
+	      -e 's|@''REPLACE_INITSTATE''@|$(REPLACE_INITSTATE)|g' \
+	      -e 's|@''REPLACE_MALLOC''@|$(REPLACE_MALLOC)|g' \
+	      -e 's|@''REPLACE_MBTOWC''@|$(REPLACE_MBTOWC)|g' \
+	      -e 's|@''REPLACE_MKSTEMP''@|$(REPLACE_MKSTEMP)|g' \
+	      -e 's|@''REPLACE_POSIX_MEMALIGN''@|$(REPLACE_POSIX_MEMALIGN)|g' \
+	      -e 's|@''REPLACE_PTSNAME''@|$(REPLACE_PTSNAME)|g' \
+	      -e 's|@''REPLACE_PTSNAME_R''@|$(REPLACE_PTSNAME_R)|g' \
+	      -e 's|@''REPLACE_PUTENV''@|$(REPLACE_PUTENV)|g' \
+	      -e 's|@''REPLACE_QSORT_R''@|$(REPLACE_QSORT_R)|g' \
+	      -e 's|@''REPLACE_RANDOM''@|$(REPLACE_RANDOM)|g' \
+	      -e 's|@''REPLACE_RANDOM_R''@|$(REPLACE_RANDOM_R)|g' \
+	      -e 's|@''REPLACE_REALLOC''@|$(REPLACE_REALLOC)|g' \
+	      -e 's|@''REPLACE_REALLOCARRAY''@|$(REPLACE_REALLOCARRAY)|g' \
+	      -e 's|@''REPLACE_REALPATH''@|$(REPLACE_REALPATH)|g' \
+	      -e 's|@''REPLACE_SETENV''@|$(REPLACE_SETENV)|g' \
+	      -e 's|@''REPLACE_SETSTATE''@|$(REPLACE_SETSTATE)|g' \
+	      -e 's|@''REPLACE_STRTOD''@|$(REPLACE_STRTOD)|g' \
+	      -e 's|@''REPLACE_STRTOL''@|$(REPLACE_STRTOL)|g' \
+	      -e 's|@''REPLACE_STRTOLD''@|$(REPLACE_STRTOLD)|g' \
+	      -e 's|@''REPLACE_STRTOLL''@|$(REPLACE_STRTOLL)|g' \
+	      -e 's|@''REPLACE_STRTOUL''@|$(REPLACE_STRTOUL)|g' \
+	      -e 's|@''REPLACE_STRTOULL''@|$(REPLACE_STRTOULL)|g' \
+	      -e 's|@''REPLACE_UNSETENV''@|$(REPLACE_UNSETENV)|g' \
+	      -e 's|@''REPLACE_WCTOMB''@|$(REPLACE_WCTOMB)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _Noreturn/r $(_NORETURN_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)'; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <string.h> when the system
+# doesn't have one that works with the given compiler.
+string.h: string.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_STRING_H''@|$(NEXT_STRING_H)|g' \
+	      -e 's/@''GNULIB_EXPLICIT_BZERO''@/$(GL_GNULIB_EXPLICIT_BZERO)/g' \
+	      -e 's/@''GNULIB_FFSL''@/$(GL_GNULIB_FFSL)/g' \
+	      -e 's/@''GNULIB_FFSLL''@/$(GL_GNULIB_FFSLL)/g' \
+	      -e 's/@''GNULIB_MBSLEN''@/$(GL_GNULIB_MBSLEN)/g' \
+	      -e 's/@''GNULIB_MBSNLEN''@/$(GL_GNULIB_MBSNLEN)/g' \
+	      -e 's/@''GNULIB_MBSCHR''@/$(GL_GNULIB_MBSCHR)/g' \
+	      -e 's/@''GNULIB_MBSRCHR''@/$(GL_GNULIB_MBSRCHR)/g' \
+	      -e 's/@''GNULIB_MBSSTR''@/$(GL_GNULIB_MBSSTR)/g' \
+	      -e 's/@''GNULIB_MBSCASECMP''@/$(GL_GNULIB_MBSCASECMP)/g' \
+	      -e 's/@''GNULIB_MBSNCASECMP''@/$(GL_GNULIB_MBSNCASECMP)/g' \
+	      -e 's/@''GNULIB_MBSPCASECMP''@/$(GL_GNULIB_MBSPCASECMP)/g' \
+	      -e 's/@''GNULIB_MBSCASESTR''@/$(GL_GNULIB_MBSCASESTR)/g' \
+	      -e 's/@''GNULIB_MBSCSPN''@/$(GL_GNULIB_MBSCSPN)/g' \
+	      -e 's/@''GNULIB_MBSPBRK''@/$(GL_GNULIB_MBSPBRK)/g' \
+	      -e 's/@''GNULIB_MBSSPN''@/$(GL_GNULIB_MBSSPN)/g' \
+	      -e 's/@''GNULIB_MBSSEP''@/$(GL_GNULIB_MBSSEP)/g' \
+	      -e 's/@''GNULIB_MBSTOK_R''@/$(GL_GNULIB_MBSTOK_R)/g' \
+	      -e 's/@''GNULIB_MEMCHR''@/$(GL_GNULIB_MEMCHR)/g' \
+	      -e 's/@''GNULIB_MEMMEM''@/$(GL_GNULIB_MEMMEM)/g' \
+	      -e 's/@''GNULIB_MEMPCPY''@/$(GL_GNULIB_MEMPCPY)/g' \
+	      -e 's/@''GNULIB_MEMRCHR''@/$(GL_GNULIB_MEMRCHR)/g' \
+	      -e 's/@''GNULIB_RAWMEMCHR''@/$(GL_GNULIB_RAWMEMCHR)/g' \
+	      -e 's/@''GNULIB_STPCPY''@/$(GL_GNULIB_STPCPY)/g' \
+	      -e 's/@''GNULIB_STPNCPY''@/$(GL_GNULIB_STPNCPY)/g' \
+	      -e 's/@''GNULIB_STRCHRNUL''@/$(GL_GNULIB_STRCHRNUL)/g' \
+	      -e 's/@''GNULIB_STRDUP''@/$(GL_GNULIB_STRDUP)/g' \
+	      -e 's/@''GNULIB_STRNCAT''@/$(GL_GNULIB_STRNCAT)/g' \
+	      -e 's/@''GNULIB_STRNDUP''@/$(GL_GNULIB_STRNDUP)/g' \
+	      -e 's/@''GNULIB_STRNLEN''@/$(GL_GNULIB_STRNLEN)/g' \
+	      -e 's/@''GNULIB_STRPBRK''@/$(GL_GNULIB_STRPBRK)/g' \
+	      -e 's/@''GNULIB_STRSEP''@/$(GL_GNULIB_STRSEP)/g' \
+	      -e 's/@''GNULIB_STRSTR''@/$(GL_GNULIB_STRSTR)/g' \
+	      -e 's/@''GNULIB_STRCASESTR''@/$(GL_GNULIB_STRCASESTR)/g' \
+	      -e 's/@''GNULIB_STRTOK_R''@/$(GL_GNULIB_STRTOK_R)/g' \
+	      -e 's/@''GNULIB_STRERROR''@/$(GL_GNULIB_STRERROR)/g' \
+	      -e 's/@''GNULIB_STRERROR_R''@/$(GL_GNULIB_STRERROR_R)/g' \
+	      -e 's/@''GNULIB_STRERRORNAME_NP''@/$(GL_GNULIB_STRERRORNAME_NP)/g' \
+	      -e 's/@''GNULIB_SIGABBREV_NP''@/$(GL_GNULIB_SIGABBREV_NP)/g' \
+	      -e 's/@''GNULIB_SIGDESCR_NP''@/$(GL_GNULIB_SIGDESCR_NP)/g' \
+	      -e 's/@''GNULIB_STRSIGNAL''@/$(GL_GNULIB_STRSIGNAL)/g' \
+	      -e 's/@''GNULIB_STRVERSCMP''@/$(GL_GNULIB_STRVERSCMP)/g' \
+	      -e 's/@''GNULIB_MDA_MEMCCPY''@/$(GL_GNULIB_MDA_MEMCCPY)/g' \
+	      -e 's/@''GNULIB_MDA_STRDUP''@/$(GL_GNULIB_MDA_STRDUP)/g' \
+	      < $(srcdir)/string.in.h | \
+	  sed -e 's|@''HAVE_EXPLICIT_BZERO''@|$(HAVE_EXPLICIT_BZERO)|g' \
+	      -e 's|@''HAVE_FFSL''@|$(HAVE_FFSL)|g' \
+	      -e 's|@''HAVE_FFSLL''@|$(HAVE_FFSLL)|g' \
+	      -e 's|@''HAVE_MBSLEN''@|$(HAVE_MBSLEN)|g' \
+	      -e 's|@''HAVE_DECL_MEMMEM''@|$(HAVE_DECL_MEMMEM)|g' \
+	      -e 's|@''HAVE_MEMPCPY''@|$(HAVE_MEMPCPY)|g' \
+	      -e 's|@''HAVE_DECL_MEMRCHR''@|$(HAVE_DECL_MEMRCHR)|g' \
+	      -e 's|@''HAVE_RAWMEMCHR''@|$(HAVE_RAWMEMCHR)|g' \
+	      -e 's|@''HAVE_STPCPY''@|$(HAVE_STPCPY)|g' \
+	      -e 's|@''HAVE_STPNCPY''@|$(HAVE_STPNCPY)|g' \
+	      -e 's|@''HAVE_STRCHRNUL''@|$(HAVE_STRCHRNUL)|g' \
+	      -e 's|@''HAVE_DECL_STRDUP''@|$(HAVE_DECL_STRDUP)|g' \
+	      -e 's|@''HAVE_DECL_STRNDUP''@|$(HAVE_DECL_STRNDUP)|g' \
+	      -e 's|@''HAVE_DECL_STRNLEN''@|$(HAVE_DECL_STRNLEN)|g' \
+	      -e 's|@''HAVE_STRPBRK''@|$(HAVE_STRPBRK)|g' \
+	      -e 's|@''HAVE_STRSEP''@|$(HAVE_STRSEP)|g' \
+	      -e 's|@''HAVE_STRCASESTR''@|$(HAVE_STRCASESTR)|g' \
+	      -e 's|@''HAVE_DECL_STRTOK_R''@|$(HAVE_DECL_STRTOK_R)|g' \
+	      -e 's|@''HAVE_DECL_STRERROR_R''@|$(HAVE_DECL_STRERROR_R)|g' \
+	      -e 's|@''HAVE_STRERRORNAME_NP''@|$(HAVE_STRERRORNAME_NP)|g' \
+	      -e 's|@''HAVE_SIGABBREV_NP''@|$(HAVE_SIGABBREV_NP)|g' \
+	      -e 's|@''HAVE_SIGDESCR_NP''@|$(HAVE_SIGDESCR_NP)|g' \
+	      -e 's|@''HAVE_DECL_STRSIGNAL''@|$(HAVE_DECL_STRSIGNAL)|g' \
+	      -e 's|@''HAVE_STRVERSCMP''@|$(HAVE_STRVERSCMP)|g' \
+	      -e 's|@''REPLACE_FFSLL''@|$(REPLACE_FFSLL)|g' \
+	      -e 's|@''REPLACE_MEMCHR''@|$(REPLACE_MEMCHR)|g' \
+	      -e 's|@''REPLACE_MEMMEM''@|$(REPLACE_MEMMEM)|g' \
+	      -e 's|@''REPLACE_STPNCPY''@|$(REPLACE_STPNCPY)|g' \
+	      -e 's|@''REPLACE_STRCHRNUL''@|$(REPLACE_STRCHRNUL)|g' \
+	      -e 's|@''REPLACE_STRDUP''@|$(REPLACE_STRDUP)|g' \
+	      -e 's|@''REPLACE_STRNCAT''@|$(REPLACE_STRNCAT)|g' \
+	      -e 's|@''REPLACE_STRNDUP''@|$(REPLACE_STRNDUP)|g' \
+	      -e 's|@''REPLACE_STRNLEN''@|$(REPLACE_STRNLEN)|g' \
+	      -e 's|@''REPLACE_STRSTR''@|$(REPLACE_STRSTR)|g' \
+	      -e 's|@''REPLACE_STRCASESTR''@|$(REPLACE_STRCASESTR)|g' \
+	      -e 's|@''REPLACE_STRTOK_R''@|$(REPLACE_STRTOK_R)|g' \
+	      -e 's|@''REPLACE_STRERROR''@|$(REPLACE_STRERROR)|g' \
+	      -e 's|@''REPLACE_STRERROR_R''@|$(REPLACE_STRERROR_R)|g' \
+	      -e 's|@''REPLACE_STRERRORNAME_NP''@|$(REPLACE_STRERRORNAME_NP)|g' \
+	      -e 's|@''REPLACE_STRSIGNAL''@|$(REPLACE_STRSIGNAL)|g' \
+	      -e 's|@''UNDEFINE_STRTOK_R''@|$(UNDEFINE_STRTOK_R)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)'; \
+	      < $(srcdir)/string.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <sys/stat.h> when the system
+# has one that is incomplete.
+sys/stat.h: sys_stat.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_at)$(MKDIR_P) sys
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SYS_STAT_H''@|$(NEXT_SYS_STAT_H)|g' \
+	      -e 's|@''WINDOWS_64_BIT_ST_SIZE''@|$(WINDOWS_64_BIT_ST_SIZE)|g' \
+	      -e 's|@''WINDOWS_STAT_TIMESPEC''@|$(WINDOWS_STAT_TIMESPEC)|g' \
+	      -e 's/@''GNULIB_FCHMODAT''@/$(GL_GNULIB_FCHMODAT)/g' \
+	      -e 's/@''GNULIB_FSTAT''@/$(GL_GNULIB_FSTAT)/g' \
+	      -e 's/@''GNULIB_FSTATAT''@/$(GL_GNULIB_FSTATAT)/g' \
+	      -e 's/@''GNULIB_FUTIMENS''@/$(GL_GNULIB_FUTIMENS)/g' \
+	      -e 's/@''GNULIB_GETUMASK''@/$(GL_GNULIB_GETUMASK)/g' \
+	      -e 's/@''GNULIB_LCHMOD''@/$(GL_GNULIB_LCHMOD)/g' \
+	      -e 's/@''GNULIB_LSTAT''@/$(GL_GNULIB_LSTAT)/g' \
+	      -e 's/@''GNULIB_MKDIR''@/$(GL_GNULIB_MKDIR)/g' \
+	      -e 's/@''GNULIB_MKDIRAT''@/$(GL_GNULIB_MKDIRAT)/g' \
+	      -e 's/@''GNULIB_MKFIFO''@/$(GL_GNULIB_MKFIFO)/g' \
+	      -e 's/@''GNULIB_MKFIFOAT''@/$(GL_GNULIB_MKFIFOAT)/g' \
+	      -e 's/@''GNULIB_MKNOD''@/$(GL_GNULIB_MKNOD)/g' \
+	      -e 's/@''GNULIB_MKNODAT''@/$(GL_GNULIB_MKNODAT)/g' \
+	      -e 's/@''GNULIB_STAT''@/$(GL_GNULIB_STAT)/g' \
+	      -e 's/@''GNULIB_UTIMENSAT''@/$(GL_GNULIB_UTIMENSAT)/g' \
+	      -e 's/@''GNULIB_OVERRIDES_STRUCT_STAT''@/$(GL_GNULIB_OVERRIDES_STRUCT_STAT)/g' \
+	      -e 's/@''GNULIB_MDA_CHMOD''@/$(GL_GNULIB_MDA_CHMOD)/g' \
+	      -e 's/@''GNULIB_MDA_MKDIR''@/$(GL_GNULIB_MDA_MKDIR)/g' \
+	      -e 's/@''GNULIB_MDA_UMASK''@/$(GL_GNULIB_MDA_UMASK)/g' \
+	      -e 's|@''HAVE_FCHMODAT''@|$(HAVE_FCHMODAT)|g' \
+	      -e 's|@''HAVE_FSTATAT''@|$(HAVE_FSTATAT)|g' \
+	      -e 's|@''HAVE_FUTIMENS''@|$(HAVE_FUTIMENS)|g' \
+	      -e 's|@''HAVE_GETUMASK''@|$(HAVE_GETUMASK)|g' \
+	      -e 's|@''HAVE_LCHMOD''@|$(HAVE_LCHMOD)|g' \
+	      -e 's|@''HAVE_LSTAT''@|$(HAVE_LSTAT)|g' \
+	      -e 's|@''HAVE_MKDIRAT''@|$(HAVE_MKDIRAT)|g' \
+	      -e 's|@''HAVE_MKFIFO''@|$(HAVE_MKFIFO)|g' \
+	      -e 's|@''HAVE_MKFIFOAT''@|$(HAVE_MKFIFOAT)|g' \
+	      -e 's|@''HAVE_MKNOD''@|$(HAVE_MKNOD)|g' \
+	      -e 's|@''HAVE_MKNODAT''@|$(HAVE_MKNODAT)|g' \
+	      -e 's|@''HAVE_UTIMENSAT''@|$(HAVE_UTIMENSAT)|g' \
+	      -e 's|@''REPLACE_FCHMODAT''@|$(REPLACE_FCHMODAT)|g' \
+	      -e 's|@''REPLACE_FSTAT''@|$(REPLACE_FSTAT)|g' \
+	      -e 's|@''REPLACE_FSTATAT''@|$(REPLACE_FSTATAT)|g' \
+	      -e 's|@''REPLACE_FUTIMENS''@|$(REPLACE_FUTIMENS)|g' \
+	      -e 's|@''REPLACE_LSTAT''@|$(REPLACE_LSTAT)|g' \
+	      -e 's|@''REPLACE_MKDIR''@|$(REPLACE_MKDIR)|g' \
+	      -e 's|@''REPLACE_MKFIFO''@|$(REPLACE_MKFIFO)|g' \
+	      -e 's|@''REPLACE_MKFIFOAT''@|$(REPLACE_MKFIFOAT)|g' \
+	      -e 's|@''REPLACE_MKNOD''@|$(REPLACE_MKNOD)|g' \
+	      -e 's|@''REPLACE_MKNODAT''@|$(REPLACE_MKNODAT)|g' \
+	      -e 's|@''REPLACE_STAT''@|$(REPLACE_STAT)|g' \
+	      -e 's|@''REPLACE_UTIMENSAT''@|$(REPLACE_UTIMENSAT)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/sys_stat.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <sys/types.h> when the system
+# doesn't have one that works with the given compiler.
+sys/types.h: sys_types.in.h $(top_builddir)/config.status
+	$(AM_V_at)$(MKDIR_P) sys
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SYS_TYPES_H''@|$(NEXT_SYS_TYPES_H)|g' \
+	      -e 's|@''WINDOWS_64_BIT_OFF_T''@|$(WINDOWS_64_BIT_OFF_T)|g' \
+	      -e 's|@''WINDOWS_STAT_INODES''@|$(WINDOWS_STAT_INODES)|g' \
+	      < $(srcdir)/sys_types.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <time.h> when the system
+# doesn't have one that works with the given compiler.
+time.h: time.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_TIME_H''@|$(NEXT_TIME_H)|g' \
+	      -e 's/@''GNULIB_CTIME''@/$(GL_GNULIB_CTIME)/g' \
+	      -e 's/@''GNULIB_LOCALTIME''@/$(GL_GNULIB_LOCALTIME)/g' \
+	      -e 's/@''GNULIB_MKTIME''@/$(GL_GNULIB_MKTIME)/g' \
+	      -e 's/@''GNULIB_NANOSLEEP''@/$(GL_GNULIB_NANOSLEEP)/g' \
+	      -e 's/@''GNULIB_STRFTIME''@/$(GL_GNULIB_STRFTIME)/g' \
+	      -e 's/@''GNULIB_STRPTIME''@/$(GL_GNULIB_STRPTIME)/g' \
+	      -e 's/@''GNULIB_TIMEGM''@/$(GL_GNULIB_TIMEGM)/g' \
+	      -e 's/@''GNULIB_TIMESPEC_GET''@/$(GL_GNULIB_TIMESPEC_GET)/g' \
+	      -e 's/@''GNULIB_TIME_R''@/$(GL_GNULIB_TIME_R)/g' \
+	      -e 's/@''GNULIB_TIME_RZ''@/$(GL_GNULIB_TIME_RZ)/g' \
+	      -e 's/@''GNULIB_TZSET''@/$(GL_GNULIB_TZSET)/g' \
+	      -e 's/@''GNULIB_MDA_TZSET''@/$(GL_GNULIB_MDA_TZSET)/g' \
+	      -e 's|@''HAVE_DECL_LOCALTIME_R''@|$(HAVE_DECL_LOCALTIME_R)|g' \
+	      -e 's|@''HAVE_NANOSLEEP''@|$(HAVE_NANOSLEEP)|g' \
+	      -e 's|@''HAVE_STRPTIME''@|$(HAVE_STRPTIME)|g' \
+	      -e 's|@''HAVE_TIMEGM''@|$(HAVE_TIMEGM)|g' \
+	      -e 's|@''HAVE_TIMESPEC_GET''@|$(HAVE_TIMESPEC_GET)|g' \
+	      -e 's|@''HAVE_TIMEZONE_T''@|$(HAVE_TIMEZONE_T)|g' \
+	      -e 's|@''REPLACE_CTIME''@|$(REPLACE_CTIME)|g' \
+	      -e 's|@''REPLACE_GMTIME''@|$(REPLACE_GMTIME)|g' \
+	      -e 's|@''REPLACE_LOCALTIME''@|$(REPLACE_LOCALTIME)|g' \
+	      -e 's|@''REPLACE_LOCALTIME_R''@|$(REPLACE_LOCALTIME_R)|g' \
+	      -e 's|@''REPLACE_MKTIME''@|$(REPLACE_MKTIME)|g' \
+	      -e 's|@''REPLACE_NANOSLEEP''@|$(REPLACE_NANOSLEEP)|g' \
+	      -e 's|@''REPLACE_STRFTIME''@|$(REPLACE_STRFTIME)|g' \
+	      -e 's|@''REPLACE_TIMEGM''@|$(REPLACE_TIMEGM)|g' \
+	      -e 's|@''REPLACE_TZSET''@|$(REPLACE_TZSET)|g' \
+	      -e 's|@''PTHREAD_H_DEFINES_STRUCT_TIMESPEC''@|$(PTHREAD_H_DEFINES_STRUCT_TIMESPEC)|g' \
+	      -e 's|@''SYS_TIME_H_DEFINES_STRUCT_TIMESPEC''@|$(SYS_TIME_H_DEFINES_STRUCT_TIMESPEC)|g' \
+	      -e 's|@''TIME_H_DEFINES_STRUCT_TIMESPEC''@|$(TIME_H_DEFINES_STRUCT_TIMESPEC)|g' \
+	      -e 's|@''UNISTD_H_DEFINES_STRUCT_TIMESPEC''@|$(UNISTD_H_DEFINES_STRUCT_TIMESPEC)|g' \
+	      -e 's|@''TIME_H_DEFINES_TIME_UTC''@|$(TIME_H_DEFINES_TIME_UTC)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/time.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create an empty placeholder for
+# <unistd.h> when the system doesn't have one.
+unistd.h: unistd.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''HAVE_UNISTD_H''@|$(HAVE_UNISTD_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_UNISTD_H''@|$(NEXT_UNISTD_H)|g' \
+	      -e 's|@''WINDOWS_64_BIT_OFF_T''@|$(WINDOWS_64_BIT_OFF_T)|g' \
+	      -e 's/@''GNULIB_ACCESS''@/$(GL_GNULIB_ACCESS)/g' \
+	      -e 's/@''GNULIB_CHDIR''@/$(GL_GNULIB_CHDIR)/g' \
+	      -e 's/@''GNULIB_CHOWN''@/$(GL_GNULIB_CHOWN)/g' \
+	      -e 's/@''GNULIB_CLOSE''@/$(GL_GNULIB_CLOSE)/g' \
+	      -e 's/@''GNULIB_COPY_FILE_RANGE''@/$(GL_GNULIB_COPY_FILE_RANGE)/g' \
+	      -e 's/@''GNULIB_DUP''@/$(GL_GNULIB_DUP)/g' \
+	      -e 's/@''GNULIB_DUP2''@/$(GL_GNULIB_DUP2)/g' \
+	      -e 's/@''GNULIB_DUP3''@/$(GL_GNULIB_DUP3)/g' \
+	      -e 's/@''GNULIB_ENVIRON''@/$(GL_GNULIB_ENVIRON)/g' \
+	      -e 's/@''GNULIB_EUIDACCESS''@/$(GL_GNULIB_EUIDACCESS)/g' \
+	      -e 's/@''GNULIB_EXECL''@/$(GL_GNULIB_EXECL)/g' \
+	      -e 's/@''GNULIB_EXECLE''@/$(GL_GNULIB_EXECLE)/g' \
+	      -e 's/@''GNULIB_EXECLP''@/$(GL_GNULIB_EXECLP)/g' \
+	      -e 's/@''GNULIB_EXECV''@/$(GL_GNULIB_EXECV)/g' \
+	      -e 's/@''GNULIB_EXECVE''@/$(GL_GNULIB_EXECVE)/g' \
+	      -e 's/@''GNULIB_EXECVP''@/$(GL_GNULIB_EXECVP)/g' \
+	      -e 's/@''GNULIB_EXECVPE''@/$(GL_GNULIB_EXECVPE)/g' \
+	      -e 's/@''GNULIB_FACCESSAT''@/$(GL_GNULIB_FACCESSAT)/g' \
+	      -e 's/@''GNULIB_FCHDIR''@/$(GL_GNULIB_FCHDIR)/g' \
+	      -e 's/@''GNULIB_FCHOWNAT''@/$(GL_GNULIB_FCHOWNAT)/g' \
+	      -e 's/@''GNULIB_FDATASYNC''@/$(GL_GNULIB_FDATASYNC)/g' \
+	      -e 's/@''GNULIB_FSYNC''@/$(GL_GNULIB_FSYNC)/g' \
+	      -e 's/@''GNULIB_FTRUNCATE''@/$(GL_GNULIB_FTRUNCATE)/g' \
+	      -e 's/@''GNULIB_GETCWD''@/$(GL_GNULIB_GETCWD)/g' \
+	      -e 's/@''GNULIB_GETDOMAINNAME''@/$(GL_GNULIB_GETDOMAINNAME)/g' \
+	      -e 's/@''GNULIB_GETDTABLESIZE''@/$(GL_GNULIB_GETDTABLESIZE)/g' \
+	      -e 's/@''GNULIB_GETENTROPY''@/$(GL_GNULIB_GETENTROPY)/g' \
+	      -e 's/@''GNULIB_GETGROUPS''@/$(GL_GNULIB_GETGROUPS)/g' \
+	      -e 's/@''GNULIB_GETHOSTNAME''@/$(GL_GNULIB_GETHOSTNAME)/g' \
+	      -e 's/@''GNULIB_GETLOGIN''@/$(GL_GNULIB_GETLOGIN)/g' \
+	      -e 's/@''GNULIB_GETLOGIN_R''@/$(GL_GNULIB_GETLOGIN_R)/g' \
+	      -e 's/@''GNULIB_GETOPT_POSIX''@/$(GL_GNULIB_GETOPT_POSIX)/g' \
+	      -e 's/@''GNULIB_GETPAGESIZE''@/$(GL_GNULIB_GETPAGESIZE)/g' \
+	      -e 's/@''GNULIB_GETPASS''@/$(GL_GNULIB_GETPASS)/g' \
+	      -e 's/@''GNULIB_GETUSERSHELL''@/$(GL_GNULIB_GETUSERSHELL)/g' \
+	      -e 's/@''GNULIB_GROUP_MEMBER''@/$(GL_GNULIB_GROUP_MEMBER)/g' \
+	      -e 's/@''GNULIB_ISATTY''@/$(GL_GNULIB_ISATTY)/g' \
+	      -e 's/@''GNULIB_LCHOWN''@/$(GL_GNULIB_LCHOWN)/g' \
+	      -e 's/@''GNULIB_LINK''@/$(GL_GNULIB_LINK)/g' \
+	      -e 's/@''GNULIB_LINKAT''@/$(GL_GNULIB_LINKAT)/g' \
+	      -e 's/@''GNULIB_LSEEK''@/$(GL_GNULIB_LSEEK)/g' \
+	      -e 's/@''GNULIB_PIPE''@/$(GL_GNULIB_PIPE)/g' \
+	      -e 's/@''GNULIB_PIPE2''@/$(GL_GNULIB_PIPE2)/g' \
+	      -e 's/@''GNULIB_PREAD''@/$(GL_GNULIB_PREAD)/g' \
+	      -e 's/@''GNULIB_PWRITE''@/$(GL_GNULIB_PWRITE)/g' \
+	      -e 's/@''GNULIB_READ''@/$(GL_GNULIB_READ)/g' \
+	      -e 's/@''GNULIB_READLINK''@/$(GL_GNULIB_READLINK)/g' \
+	      -e 's/@''GNULIB_READLINKAT''@/$(GL_GNULIB_READLINKAT)/g' \
+	      -e 's/@''GNULIB_RMDIR''@/$(GL_GNULIB_RMDIR)/g' \
+	      -e 's/@''GNULIB_SETHOSTNAME''@/$(GL_GNULIB_SETHOSTNAME)/g' \
+	      -e 's/@''GNULIB_SLEEP''@/$(GL_GNULIB_SLEEP)/g' \
+	      -e 's/@''GNULIB_SYMLINK''@/$(GL_GNULIB_SYMLINK)/g' \
+	      -e 's/@''GNULIB_SYMLINKAT''@/$(GL_GNULIB_SYMLINKAT)/g' \
+	      -e 's/@''GNULIB_TRUNCATE''@/$(GL_GNULIB_TRUNCATE)/g' \
+	      -e 's/@''GNULIB_TTYNAME_R''@/$(GL_GNULIB_TTYNAME_R)/g' \
+	      -e 's/@''GNULIB_UNISTD_H_GETOPT''@/0$(GL_GNULIB_UNISTD_H_GETOPT)/g' \
+	      -e 's/@''GNULIB_UNISTD_H_NONBLOCKING''@/$(GL_GNULIB_UNISTD_H_NONBLOCKING)/g' \
+	      -e 's/@''GNULIB_UNISTD_H_SIGPIPE''@/$(GL_GNULIB_UNISTD_H_SIGPIPE)/g' \
+	      -e 's/@''GNULIB_UNLINK''@/$(GL_GNULIB_UNLINK)/g' \
+	      -e 's/@''GNULIB_UNLINKAT''@/$(GL_GNULIB_UNLINKAT)/g' \
+	      -e 's/@''GNULIB_USLEEP''@/$(GL_GNULIB_USLEEP)/g' \
+	      -e 's/@''GNULIB_WRITE''@/$(GL_GNULIB_WRITE)/g' \
+	      -e 's/@''GNULIB_MDA_ACCESS''@/$(GL_GNULIB_MDA_ACCESS)/g' \
+	      -e 's/@''GNULIB_MDA_CHDIR''@/$(GL_GNULIB_MDA_CHDIR)/g' \
+	      -e 's/@''GNULIB_MDA_CLOSE''@/$(GL_GNULIB_MDA_CLOSE)/g' \
+	      -e 's/@''GNULIB_MDA_DUP''@/$(GL_GNULIB_MDA_DUP)/g' \
+	      -e 's/@''GNULIB_MDA_DUP2''@/$(GL_GNULIB_MDA_DUP2)/g' \
+	      -e 's/@''GNULIB_MDA_EXECL''@/$(GL_GNULIB_MDA_EXECL)/g' \
+	      -e 's/@''GNULIB_MDA_EXECLE''@/$(GL_GNULIB_MDA_EXECLE)/g' \
+	      -e 's/@''GNULIB_MDA_EXECLP''@/$(GL_GNULIB_MDA_EXECLP)/g' \
+	      -e 's/@''GNULIB_MDA_EXECV''@/$(GL_GNULIB_MDA_EXECV)/g' \
+	      -e 's/@''GNULIB_MDA_EXECVE''@/$(GL_GNULIB_MDA_EXECVE)/g' \
+	      -e 's/@''GNULIB_MDA_EXECVP''@/$(GL_GNULIB_MDA_EXECVP)/g' \
+	      -e 's/@''GNULIB_MDA_EXECVPE''@/$(GL_GNULIB_MDA_EXECVPE)/g' \
+	      -e 's/@''GNULIB_MDA_GETCWD''@/$(GL_GNULIB_MDA_GETCWD)/g' \
+	      -e 's/@''GNULIB_MDA_GETPID''@/$(GL_GNULIB_MDA_GETPID)/g' \
+	      -e 's/@''GNULIB_MDA_ISATTY''@/$(GL_GNULIB_MDA_ISATTY)/g' \
+	      -e 's/@''GNULIB_MDA_LSEEK''@/$(GL_GNULIB_MDA_LSEEK)/g' \
+	      -e 's/@''GNULIB_MDA_READ''@/$(GL_GNULIB_MDA_READ)/g' \
+	      -e 's/@''GNULIB_MDA_RMDIR''@/$(GL_GNULIB_MDA_RMDIR)/g' \
+	      -e 's/@''GNULIB_MDA_SWAB''@/$(GL_GNULIB_MDA_SWAB)/g' \
+	      -e 's/@''GNULIB_MDA_UNLINK''@/$(GL_GNULIB_MDA_UNLINK)/g' \
+	      -e 's/@''GNULIB_MDA_WRITE''@/$(GL_GNULIB_MDA_WRITE)/g' \
+	      < $(srcdir)/unistd.in.h | \
+	  sed -e 's|@''HAVE_CHOWN''@|$(HAVE_CHOWN)|g' \
+	      -e 's|@''HAVE_COPY_FILE_RANGE''@|$(HAVE_COPY_FILE_RANGE)|g' \
+	      -e 's|@''HAVE_DUP3''@|$(HAVE_DUP3)|g' \
+	      -e 's|@''HAVE_EUIDACCESS''@|$(HAVE_EUIDACCESS)|g' \
+	      -e 's|@''HAVE_EXECVPE''@|$(HAVE_EXECVPE)|g' \
+	      -e 's|@''HAVE_FACCESSAT''@|$(HAVE_FACCESSAT)|g' \
+	      -e 's|@''HAVE_FCHDIR''@|$(HAVE_FCHDIR)|g' \
+	      -e 's|@''HAVE_FCHOWNAT''@|$(HAVE_FCHOWNAT)|g' \
+	      -e 's|@''HAVE_FDATASYNC''@|$(HAVE_FDATASYNC)|g' \
+	      -e 's|@''HAVE_FSYNC''@|$(HAVE_FSYNC)|g' \
+	      -e 's|@''HAVE_FTRUNCATE''@|$(HAVE_FTRUNCATE)|g' \
+	      -e 's|@''HAVE_GETDTABLESIZE''@|$(HAVE_GETDTABLESIZE)|g' \
+	      -e 's|@''HAVE_GETENTROPY''@|$(HAVE_GETENTROPY)|g' \
+	      -e 's|@''HAVE_GETGROUPS''@|$(HAVE_GETGROUPS)|g' \
+	      -e 's|@''HAVE_GETHOSTNAME''@|$(HAVE_GETHOSTNAME)|g' \
+	      -e 's|@''HAVE_GETPAGESIZE''@|$(HAVE_GETPAGESIZE)|g' \
+	      -e 's|@''HAVE_GETPASS''@|$(HAVE_GETPASS)|g' \
+	      -e 's|@''HAVE_GROUP_MEMBER''@|$(HAVE_GROUP_MEMBER)|g' \
+	      -e 's|@''HAVE_LCHOWN''@|$(HAVE_LCHOWN)|g' \
+	      -e 's|@''HAVE_LINK''@|$(HAVE_LINK)|g' \
+	      -e 's|@''HAVE_LINKAT''@|$(HAVE_LINKAT)|g' \
+	      -e 's|@''HAVE_PIPE''@|$(HAVE_PIPE)|g' \
+	      -e 's|@''HAVE_PIPE2''@|$(HAVE_PIPE2)|g' \
+	      -e 's|@''HAVE_PREAD''@|$(HAVE_PREAD)|g' \
+	      -e 's|@''HAVE_PWRITE''@|$(HAVE_PWRITE)|g' \
+	      -e 's|@''HAVE_READLINK''@|$(HAVE_READLINK)|g' \
+	      -e 's|@''HAVE_READLINKAT''@|$(HAVE_READLINKAT)|g' \
+	      -e 's|@''HAVE_SETHOSTNAME''@|$(HAVE_SETHOSTNAME)|g' \
+	      -e 's|@''HAVE_SLEEP''@|$(HAVE_SLEEP)|g' \
+	      -e 's|@''HAVE_SYMLINK''@|$(HAVE_SYMLINK)|g' \
+	      -e 's|@''HAVE_SYMLINKAT''@|$(HAVE_SYMLINKAT)|g' \
+	      -e 's|@''HAVE_UNLINKAT''@|$(HAVE_UNLINKAT)|g' \
+	      -e 's|@''HAVE_USLEEP''@|$(HAVE_USLEEP)|g' \
+	      -e 's|@''HAVE_DECL_ENVIRON''@|$(HAVE_DECL_ENVIRON)|g' \
+	      -e 's|@''HAVE_DECL_EXECVPE''@|$(HAVE_DECL_EXECVPE)|g' \
+	      -e 's|@''HAVE_DECL_FCHDIR''@|$(HAVE_DECL_FCHDIR)|g' \
+	      -e 's|@''HAVE_DECL_FDATASYNC''@|$(HAVE_DECL_FDATASYNC)|g' \
+	      -e 's|@''HAVE_DECL_GETDOMAINNAME''@|$(HAVE_DECL_GETDOMAINNAME)|g' \
+	      -e 's|@''HAVE_DECL_GETLOGIN''@|$(HAVE_DECL_GETLOGIN)|g' \
+	      -e 's|@''HAVE_DECL_GETLOGIN_R''@|$(HAVE_DECL_GETLOGIN_R)|g' \
+	      -e 's|@''HAVE_DECL_GETPAGESIZE''@|$(HAVE_DECL_GETPAGESIZE)|g' \
+	      -e 's|@''HAVE_DECL_GETUSERSHELL''@|$(HAVE_DECL_GETUSERSHELL)|g' \
+	      -e 's|@''HAVE_DECL_SETHOSTNAME''@|$(HAVE_DECL_SETHOSTNAME)|g' \
+	      -e 's|@''HAVE_DECL_TRUNCATE''@|$(HAVE_DECL_TRUNCATE)|g' \
+	      -e 's|@''HAVE_DECL_TTYNAME_R''@|$(HAVE_DECL_TTYNAME_R)|g' \
+	      -e 's|@''HAVE_OS_H''@|$(HAVE_OS_H)|g' \
+	      -e 's|@''HAVE_SYS_PARAM_H''@|$(HAVE_SYS_PARAM_H)|g' \
+	  | \
+	  sed -e 's|@''REPLACE_ACCESS''@|$(REPLACE_ACCESS)|g' \
+	      -e 's|@''REPLACE_CHOWN''@|$(REPLACE_CHOWN)|g' \
+	      -e 's|@''REPLACE_CLOSE''@|$(REPLACE_CLOSE)|g' \
+	      -e 's|@''REPLACE_DUP''@|$(REPLACE_DUP)|g' \
+	      -e 's|@''REPLACE_DUP2''@|$(REPLACE_DUP2)|g' \
+	      -e 's|@''REPLACE_EXECL''@|$(REPLACE_EXECL)|g' \
+	      -e 's|@''REPLACE_EXECLE''@|$(REPLACE_EXECLE)|g' \
+	      -e 's|@''REPLACE_EXECLP''@|$(REPLACE_EXECLP)|g' \
+	      -e 's|@''REPLACE_EXECV''@|$(REPLACE_EXECV)|g' \
+	      -e 's|@''REPLACE_EXECVE''@|$(REPLACE_EXECVE)|g' \
+	      -e 's|@''REPLACE_EXECVP''@|$(REPLACE_EXECVP)|g' \
+	      -e 's|@''REPLACE_EXECVPE''@|$(REPLACE_EXECVPE)|g' \
+	      -e 's|@''REPLACE_FACCESSAT''@|$(REPLACE_FACCESSAT)|g' \
+	      -e 's|@''REPLACE_FCHOWNAT''@|$(REPLACE_FCHOWNAT)|g' \
+	      -e 's|@''REPLACE_FTRUNCATE''@|$(REPLACE_FTRUNCATE)|g' \
+	      -e 's|@''REPLACE_GETCWD''@|$(REPLACE_GETCWD)|g' \
+	      -e 's|@''REPLACE_GETDOMAINNAME''@|$(REPLACE_GETDOMAINNAME)|g' \
+	      -e 's|@''REPLACE_GETDTABLESIZE''@|$(REPLACE_GETDTABLESIZE)|g' \
+	      -e 's|@''REPLACE_GETLOGIN_R''@|$(REPLACE_GETLOGIN_R)|g' \
+	      -e 's|@''REPLACE_GETGROUPS''@|$(REPLACE_GETGROUPS)|g' \
+	      -e 's|@''REPLACE_GETPAGESIZE''@|$(REPLACE_GETPAGESIZE)|g' \
+	      -e 's|@''REPLACE_GETPASS''@|$(REPLACE_GETPASS)|g' \
+	      -e 's|@''REPLACE_ISATTY''@|$(REPLACE_ISATTY)|g' \
+	      -e 's|@''REPLACE_LCHOWN''@|$(REPLACE_LCHOWN)|g' \
+	      -e 's|@''REPLACE_LINK''@|$(REPLACE_LINK)|g' \
+	      -e 's|@''REPLACE_LINKAT''@|$(REPLACE_LINKAT)|g' \
+	      -e 's|@''REPLACE_LSEEK''@|$(REPLACE_LSEEK)|g' \
+	      -e 's|@''REPLACE_PREAD''@|$(REPLACE_PREAD)|g' \
+	      -e 's|@''REPLACE_PWRITE''@|$(REPLACE_PWRITE)|g' \
+	      -e 's|@''REPLACE_READ''@|$(REPLACE_READ)|g' \
+	      -e 's|@''REPLACE_READLINK''@|$(REPLACE_READLINK)|g' \
+	      -e 's|@''REPLACE_READLINKAT''@|$(REPLACE_READLINKAT)|g' \
+	      -e 's|@''REPLACE_RMDIR''@|$(REPLACE_RMDIR)|g' \
+	      -e 's|@''REPLACE_SLEEP''@|$(REPLACE_SLEEP)|g' \
+	      -e 's|@''REPLACE_SYMLINK''@|$(REPLACE_SYMLINK)|g' \
+	      -e 's|@''REPLACE_SYMLINKAT''@|$(REPLACE_SYMLINKAT)|g' \
+	      -e 's|@''REPLACE_TRUNCATE''@|$(REPLACE_TRUNCATE)|g' \
+	      -e 's|@''REPLACE_TTYNAME_R''@|$(REPLACE_TTYNAME_R)|g' \
+	      -e 's|@''REPLACE_UNLINK''@|$(REPLACE_UNLINK)|g' \
+	      -e 's|@''REPLACE_UNLINKAT''@|$(REPLACE_UNLINKAT)|g' \
+	      -e 's|@''REPLACE_USLEEP''@|$(REPLACE_USLEEP)|g' \
+	      -e 's|@''REPLACE_WRITE''@|$(REPLACE_WRITE)|g' \
+	      -e 's|@''UNISTD_H_HAVE_SYS_RANDOM_H''@|$(UNISTD_H_HAVE_SYS_RANDOM_H)|g' \
+	      -e 's|@''UNISTD_H_HAVE_WINSOCK2_H''@|$(UNISTD_H_HAVE_WINSOCK2_H)|g' \
+	      -e 's|@''UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS''@|$(UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)'; \
+	} > $@-t && \
+	mv $@-t $@
+
+unistr.h: unistr.in.h
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  cat $(srcdir)/unistr.in.h; \
+	} > $@-t && \
+	mv -f $@-t $@
+
+unitypes.h: unitypes.in.h
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  cat $(srcdir)/unitypes.in.h; \
+	} > $@-t && \
+	mv -f $@-t $@
+
+uniwidth.h: uniwidth.in.h
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  cat $(srcdir)/uniwidth.in.h; \
+	} > $@-t && \
+	mv -f $@-t $@
+
+# We need the following in order to create <wchar.h> when the system
+# version does not work standalone.
+wchar.h: wchar.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''HAVE_FEATURES_H''@|$(HAVE_FEATURES_H)|g' \
+	      -e 's|@''NEXT_WCHAR_H''@|$(NEXT_WCHAR_H)|g' \
+	      -e 's|@''HAVE_WCHAR_H''@|$(HAVE_WCHAR_H)|g' \
+	      -e 's/@''HAVE_CRTDEFS_H''@/$(HAVE_CRTDEFS_H)/g' \
+	      -e 's/@''GNULIBHEADERS_OVERRIDE_WINT_T''@/$(GNULIBHEADERS_OVERRIDE_WINT_T)/g' \
+	      -e 's/@''GNULIB_BTOWC''@/$(GL_GNULIB_BTOWC)/g' \
+	      -e 's/@''GNULIB_WCTOB''@/$(GL_GNULIB_WCTOB)/g' \
+	      -e 's/@''GNULIB_MBSINIT''@/$(GL_GNULIB_MBSINIT)/g' \
+	      -e 's/@''GNULIB_MBRTOWC''@/$(GL_GNULIB_MBRTOWC)/g' \
+	      -e 's/@''GNULIB_MBRLEN''@/$(GL_GNULIB_MBRLEN)/g' \
+	      -e 's/@''GNULIB_MBSRTOWCS''@/$(GL_GNULIB_MBSRTOWCS)/g' \
+	      -e 's/@''GNULIB_MBSNRTOWCS''@/$(GL_GNULIB_MBSNRTOWCS)/g' \
+	      -e 's/@''GNULIB_WCRTOMB''@/$(GL_GNULIB_WCRTOMB)/g' \
+	      -e 's/@''GNULIB_WCSRTOMBS''@/$(GL_GNULIB_WCSRTOMBS)/g' \
+	      -e 's/@''GNULIB_WCSNRTOMBS''@/$(GL_GNULIB_WCSNRTOMBS)/g' \
+	      -e 's/@''GNULIB_WCWIDTH''@/$(GL_GNULIB_WCWIDTH)/g' \
+	      -e 's/@''GNULIB_WMEMCHR''@/$(GL_GNULIB_WMEMCHR)/g' \
+	      -e 's/@''GNULIB_WMEMCMP''@/$(GL_GNULIB_WMEMCMP)/g' \
+	      -e 's/@''GNULIB_WMEMCPY''@/$(GL_GNULIB_WMEMCPY)/g' \
+	      -e 's/@''GNULIB_WMEMMOVE''@/$(GL_GNULIB_WMEMMOVE)/g' \
+	      -e 's/@''GNULIB_WMEMPCPY''@/$(GL_GNULIB_WMEMPCPY)/g' \
+	      -e 's/@''GNULIB_WMEMSET''@/$(GL_GNULIB_WMEMSET)/g' \
+	      -e 's/@''GNULIB_WCSLEN''@/$(GL_GNULIB_WCSLEN)/g' \
+	      -e 's/@''GNULIB_WCSNLEN''@/$(GL_GNULIB_WCSNLEN)/g' \
+	      -e 's/@''GNULIB_WCSCPY''@/$(GL_GNULIB_WCSCPY)/g' \
+	      -e 's/@''GNULIB_WCPCPY''@/$(GL_GNULIB_WCPCPY)/g' \
+	      -e 's/@''GNULIB_WCSNCPY''@/$(GL_GNULIB_WCSNCPY)/g' \
+	      -e 's/@''GNULIB_WCPNCPY''@/$(GL_GNULIB_WCPNCPY)/g' \
+	      -e 's/@''GNULIB_WCSCAT''@/$(GL_GNULIB_WCSCAT)/g' \
+	      -e 's/@''GNULIB_WCSNCAT''@/$(GL_GNULIB_WCSNCAT)/g' \
+	      -e 's/@''GNULIB_WCSCMP''@/$(GL_GNULIB_WCSCMP)/g' \
+	      -e 's/@''GNULIB_WCSNCMP''@/$(GL_GNULIB_WCSNCMP)/g' \
+	      -e 's/@''GNULIB_WCSCASECMP''@/$(GL_GNULIB_WCSCASECMP)/g' \
+	      -e 's/@''GNULIB_WCSNCASECMP''@/$(GL_GNULIB_WCSNCASECMP)/g' \
+	      -e 's/@''GNULIB_WCSCOLL''@/$(GL_GNULIB_WCSCOLL)/g' \
+	      -e 's/@''GNULIB_WCSXFRM''@/$(GL_GNULIB_WCSXFRM)/g' \
+	      -e 's/@''GNULIB_WCSDUP''@/$(GL_GNULIB_WCSDUP)/g' \
+	      -e 's/@''GNULIB_WCSCHR''@/$(GL_GNULIB_WCSCHR)/g' \
+	      -e 's/@''GNULIB_WCSRCHR''@/$(GL_GNULIB_WCSRCHR)/g' \
+	      -e 's/@''GNULIB_WCSCSPN''@/$(GL_GNULIB_WCSCSPN)/g' \
+	      -e 's/@''GNULIB_WCSSPN''@/$(GL_GNULIB_WCSSPN)/g' \
+	      -e 's/@''GNULIB_WCSPBRK''@/$(GL_GNULIB_WCSPBRK)/g' \
+	      -e 's/@''GNULIB_WCSSTR''@/$(GL_GNULIB_WCSSTR)/g' \
+	      -e 's/@''GNULIB_WCSTOK''@/$(GL_GNULIB_WCSTOK)/g' \
+	      -e 's/@''GNULIB_WCSWIDTH''@/$(GL_GNULIB_WCSWIDTH)/g' \
+	      -e 's/@''GNULIB_WCSFTIME''@/$(GL_GNULIB_WCSFTIME)/g' \
+	      -e 's/@''GNULIB_MDA_WCSDUP''@/$(GL_GNULIB_MDA_WCSDUP)/g' \
+	      < $(srcdir)/wchar.in.h | \
+	  sed -e 's|@''HAVE_WINT_T''@|$(HAVE_WINT_T)|g' \
+	      -e 's|@''HAVE_BTOWC''@|$(HAVE_BTOWC)|g' \
+	      -e 's|@''HAVE_MBSINIT''@|$(HAVE_MBSINIT)|g' \
+	      -e 's|@''HAVE_MBRTOWC''@|$(HAVE_MBRTOWC)|g' \
+	      -e 's|@''HAVE_MBRLEN''@|$(HAVE_MBRLEN)|g' \
+	      -e 's|@''HAVE_MBSRTOWCS''@|$(HAVE_MBSRTOWCS)|g' \
+	      -e 's|@''HAVE_MBSNRTOWCS''@|$(HAVE_MBSNRTOWCS)|g' \
+	      -e 's|@''HAVE_WCRTOMB''@|$(HAVE_WCRTOMB)|g' \
+	      -e 's|@''HAVE_WCSRTOMBS''@|$(HAVE_WCSRTOMBS)|g' \
+	      -e 's|@''HAVE_WCSNRTOMBS''@|$(HAVE_WCSNRTOMBS)|g' \
+	      -e 's|@''HAVE_WMEMCHR''@|$(HAVE_WMEMCHR)|g' \
+	      -e 's|@''HAVE_WMEMCMP''@|$(HAVE_WMEMCMP)|g' \
+	      -e 's|@''HAVE_WMEMCPY''@|$(HAVE_WMEMCPY)|g' \
+	      -e 's|@''HAVE_WMEMMOVE''@|$(HAVE_WMEMMOVE)|g' \
+	      -e 's|@''HAVE_WMEMPCPY''@|$(HAVE_WMEMPCPY)|g' \
+	      -e 's|@''HAVE_WMEMSET''@|$(HAVE_WMEMSET)|g' \
+	      -e 's|@''HAVE_WCSLEN''@|$(HAVE_WCSLEN)|g' \
+	      -e 's|@''HAVE_WCSNLEN''@|$(HAVE_WCSNLEN)|g' \
+	      -e 's|@''HAVE_WCSCPY''@|$(HAVE_WCSCPY)|g' \
+	      -e 's|@''HAVE_WCPCPY''@|$(HAVE_WCPCPY)|g' \
+	      -e 's|@''HAVE_WCSNCPY''@|$(HAVE_WCSNCPY)|g' \
+	      -e 's|@''HAVE_WCPNCPY''@|$(HAVE_WCPNCPY)|g' \
+	      -e 's|@''HAVE_WCSCAT''@|$(HAVE_WCSCAT)|g' \
+	      -e 's|@''HAVE_WCSNCAT''@|$(HAVE_WCSNCAT)|g' \
+	      -e 's|@''HAVE_WCSCMP''@|$(HAVE_WCSCMP)|g' \
+	      -e 's|@''HAVE_WCSNCMP''@|$(HAVE_WCSNCMP)|g' \
+	      -e 's|@''HAVE_WCSCASECMP''@|$(HAVE_WCSCASECMP)|g' \
+	      -e 's|@''HAVE_WCSNCASECMP''@|$(HAVE_WCSNCASECMP)|g' \
+	      -e 's|@''HAVE_WCSCOLL''@|$(HAVE_WCSCOLL)|g' \
+	      -e 's|@''HAVE_WCSXFRM''@|$(HAVE_WCSXFRM)|g' \
+	      -e 's|@''HAVE_WCSDUP''@|$(HAVE_WCSDUP)|g' \
+	      -e 's|@''HAVE_WCSCHR''@|$(HAVE_WCSCHR)|g' \
+	      -e 's|@''HAVE_WCSRCHR''@|$(HAVE_WCSRCHR)|g' \
+	      -e 's|@''HAVE_WCSCSPN''@|$(HAVE_WCSCSPN)|g' \
+	      -e 's|@''HAVE_WCSSPN''@|$(HAVE_WCSSPN)|g' \
+	      -e 's|@''HAVE_WCSPBRK''@|$(HAVE_WCSPBRK)|g' \
+	      -e 's|@''HAVE_WCSSTR''@|$(HAVE_WCSSTR)|g' \
+	      -e 's|@''HAVE_WCSTOK''@|$(HAVE_WCSTOK)|g' \
+	      -e 's|@''HAVE_WCSWIDTH''@|$(HAVE_WCSWIDTH)|g' \
+	      -e 's|@''HAVE_WCSFTIME''@|$(HAVE_WCSFTIME)|g' \
+	      -e 's|@''HAVE_DECL_WCTOB''@|$(HAVE_DECL_WCTOB)|g' \
+	      -e 's|@''HAVE_DECL_WCSDUP''@|$(HAVE_DECL_WCSDUP)|g' \
+	      -e 's|@''HAVE_DECL_WCWIDTH''@|$(HAVE_DECL_WCWIDTH)|g' \
+	  | \
+	  sed -e 's|@''REPLACE_MBSTATE_T''@|$(REPLACE_MBSTATE_T)|g' \
+	      -e 's|@''REPLACE_BTOWC''@|$(REPLACE_BTOWC)|g' \
+	      -e 's|@''REPLACE_WCTOB''@|$(REPLACE_WCTOB)|g' \
+	      -e 's|@''REPLACE_MBSINIT''@|$(REPLACE_MBSINIT)|g' \
+	      -e 's|@''REPLACE_MBRTOWC''@|$(REPLACE_MBRTOWC)|g' \
+	      -e 's|@''REPLACE_MBRLEN''@|$(REPLACE_MBRLEN)|g' \
+	      -e 's|@''REPLACE_MBSRTOWCS''@|$(REPLACE_MBSRTOWCS)|g' \
+	      -e 's|@''REPLACE_MBSNRTOWCS''@|$(REPLACE_MBSNRTOWCS)|g' \
+	      -e 's|@''REPLACE_WCRTOMB''@|$(REPLACE_WCRTOMB)|g' \
+	      -e 's|@''REPLACE_WCSRTOMBS''@|$(REPLACE_WCSRTOMBS)|g' \
+	      -e 's|@''REPLACE_WCSNRTOMBS''@|$(REPLACE_WCSNRTOMBS)|g' \
+	      -e 's|@''REPLACE_WCWIDTH''@|$(REPLACE_WCWIDTH)|g' \
+	      -e 's|@''REPLACE_WCSWIDTH''@|$(REPLACE_WCSWIDTH)|g' \
+	      -e 's|@''REPLACE_WCSFTIME''@|$(REPLACE_WCSFTIME)|g' \
+	      -e 's|@''REPLACE_WCSTOK''@|$(REPLACE_WCSTOK)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)'; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <wctype.h> when the system
+# doesn't have one that works with the given compiler.
+wctype.h: wctype.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's/@''HAVE_WCTYPE_H''@/$(HAVE_WCTYPE_H)/g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_WCTYPE_H''@|$(NEXT_WCTYPE_H)|g' \
+	      -e 's/@''HAVE_CRTDEFS_H''@/$(HAVE_CRTDEFS_H)/g' \
+	      -e 's/@''GNULIBHEADERS_OVERRIDE_WINT_T''@/$(GNULIBHEADERS_OVERRIDE_WINT_T)/g' \
+	      -e 's/@''GNULIB_ISWBLANK''@/$(GL_GNULIB_ISWBLANK)/g' \
+	      -e 's/@''GNULIB_ISWDIGIT''@/$(GL_GNULIB_ISWDIGIT)/g' \
+	      -e 's/@''GNULIB_ISWXDIGIT''@/$(GL_GNULIB_ISWXDIGIT)/g' \
+	      -e 's/@''GNULIB_WCTYPE''@/$(GL_GNULIB_WCTYPE)/g' \
+	      -e 's/@''GNULIB_ISWCTYPE''@/$(GL_GNULIB_ISWCTYPE)/g' \
+	      -e 's/@''GNULIB_WCTRANS''@/$(GL_GNULIB_WCTRANS)/g' \
+	      -e 's/@''GNULIB_TOWCTRANS''@/$(GL_GNULIB_TOWCTRANS)/g' \
+	      -e 's/@''HAVE_ISWBLANK''@/$(HAVE_ISWBLANK)/g' \
+	      -e 's/@''HAVE_ISWCNTRL''@/$(HAVE_ISWCNTRL)/g' \
+	      -e 's/@''HAVE_WCTYPE_T''@/$(HAVE_WCTYPE_T)/g' \
+	      -e 's/@''HAVE_WCTRANS_T''@/$(HAVE_WCTRANS_T)/g' \
+	      -e 's/@''HAVE_WINT_T''@/$(HAVE_WINT_T)/g' \
+	      -e 's/@''REPLACE_ISWBLANK''@/$(REPLACE_ISWBLANK)/g' \
+	      -e 's/@''REPLACE_ISWDIGIT''@/$(REPLACE_ISWDIGIT)/g' \
+	      -e 's/@''REPLACE_ISWXDIGIT''@/$(REPLACE_ISWXDIGIT)/g' \
+	      -e 's/@''REPLACE_ISWCNTRL''@/$(REPLACE_ISWCNTRL)/g' \
+	      -e 's/@''REPLACE_TOWLOWER''@/$(REPLACE_TOWLOWER)/g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/wctype.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+mostlyclean-local: mostlyclean-generic
+	@for dir in '' $(MOSTLYCLEANDIRS); do \
+	  if test -n "$$dir" && test -d $$dir; then \
+	    echo "rmdir $$dir"; rmdir $$dir; \
+	  fi; \
+	done; \
+	:
+colorize.c:
+	$(AM_V_at)echo '#include <$(COLORIZE_SOURCE)>' >$@-t
+	$(AM_V_at)mv $@-t $@
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/grep/lib/_Noreturn.h b/src/grep/lib/_Noreturn.h
new file mode 100644
index 0000000..cb72f26
--- /dev/null
+++ b/src/grep/lib/_Noreturn.h
@@ -0,0 +1,45 @@
+/* A C macro for declaring that a function does not return.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as published
+   by the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _Noreturn
+# if (defined __cplusplus \
+      && ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \
+          || (defined _MSC_VER && 1900 <= _MSC_VER)) \
+      && 0)
+    /* [[noreturn]] is not practically usable, because with it the syntax
+         extern _Noreturn void func (...);
+       would not be valid; such a declaration would only be valid with 'extern'
+       and '_Noreturn' swapped, or without the 'extern' keyword.  However, some
+       AIX system header files and several gnulib header files use precisely
+       this syntax with 'extern'.  */
+#  define _Noreturn [[noreturn]]
+# elif ((!defined __cplusplus || defined __clang__) \
+        && (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \
+            || (!defined __STRICT_ANSI__ \
+                && (__4 < __GNUC__ + (7 <= __GNUC_MINOR__) \
+                    || (defined __apple_build_version__ \
+                        ? 6000000 <= __apple_build_version__ \
+                        : 3 < __clang_major__ + (5 <= __clang_minor__))))))
+   /* _Noreturn works as-is.  */
+# elif (2 < __GNUC__ + (8 <= __GNUC_MINOR__) || defined __clang__ \
+        || 0x5110 <= __SUNPRO_C)
+#  define _Noreturn __attribute__ ((__noreturn__))
+# elif 1200 <= (defined _MSC_VER ? _MSC_VER : 0)
+#  define _Noreturn __declspec (noreturn)
+# else
+#  define _Noreturn
+# endif
+#endif
diff --git a/src/grep/lib/alignof.h b/src/grep/lib/alignof.h
new file mode 100644
index 0000000..e6e7a51
--- /dev/null
+++ b/src/grep/lib/alignof.h
@@ -0,0 +1,52 @@
+/* Determine alignment of types.
+   Copyright (C) 2003-2004, 2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _ALIGNOF_H
+#define _ALIGNOF_H
+
+#include <stddef.h>
+
+/* alignof_slot (TYPE)
+   Determine the alignment of a structure slot (field) of a given type,
+   at compile time.  Note that the result depends on the ABI.
+   This is the same as alignof (TYPE) and _Alignof (TYPE), defined in
+   <stdalign.h> if __alignof_is_defined is 1.
+   Note: The result cannot be used as a value for an 'enum' constant,
+   due to bugs in HP-UX 10.20 cc and AIX 3.2.5 xlc.  */
+#if defined __cplusplus
+  template <class type> struct alignof_helper { char __slot1; type __slot2; };
+# define alignof_slot(type) offsetof (alignof_helper<type>, __slot2)
+#else
+# define alignof_slot(type) offsetof (struct { char __slot1; type __slot2; }, __slot2)
+#endif
+
+/* alignof_type (TYPE)
+   Determine the good alignment of an object of the given type at compile time.
+   Note that this is not necessarily the same as alignof_slot(type).
+   For example, with GNU C on x86 platforms and with clang on Linux/x86:
+   alignof_type(long long) = 8, but alignof_slot(long long) = 4.
+   And alignof_type(double) = 8, but
+   - when -malign-double is not specified:  alignof_slot(double) = 4,
+   - when -malign-double is specified:      alignof_slot(double) = 8.
+   Note: The result cannot be used as a value for an 'enum' constant,
+   due to bugs in HP-UX 10.20 cc and AIX 3.2.5 xlc.  */
+#if defined __GNUC__ || defined __clang__ || defined __IBM__ALIGNOF__
+# define alignof_type __alignof__
+#else
+# define alignof_type alignof_slot
+#endif
+
+#endif /* _ALIGNOF_H */
diff --git a/src/grep/lib/alloca.c b/src/grep/lib/alloca.c
new file mode 100644
index 0000000..4880283
--- /dev/null
+++ b/src/grep/lib/alloca.c
@@ -0,0 +1,202 @@
+/* alloca.c -- allocate automatically reclaimed memory
+   This file is in the public domain.  */
+
+/* (Mostly) portable implementation -- D A Gwyn
+
+   This implementation of the PWB library alloca function,
+   which is used to allocate space off the run-time stack so
+   that it is automatically reclaimed upon procedure exit,
+   was inspired by discussions with J. Q. Johnson of Cornell.
+   J.Otto Tennant <jot@cray.com> contributed the Cray support.
+
+   There are some preprocessor constants that can
+   be defined when compiling for your specific system, for
+   improved efficiency; however, the defaults should be okay.
+
+   The general concept of this implementation is to keep
+   track of all alloca-allocated blocks, and reclaim any
+   that are found to be deeper in the stack than the current
+   invocation.  This heuristic does not reclaim storage as
+   soon as it becomes invalid, but it will do so eventually.
+
+   As a special case, alloca(0) reclaims storage without
+   allocating any.  It is a good idea to use alloca(0) in
+   your main control loop, etc. to force garbage collection.  */
+
+#include <config.h>
+
+#include <alloca.h>
+
+#include <string.h>
+#include <stdlib.h>
+
+#ifdef emacs
+# include "lisp.h"
+# include "blockinput.h"
+# ifdef EMACS_FREE
+#  undef free
+#  define free EMACS_FREE
+# endif
+#else
+# define memory_full() abort ()
+#endif
+
+/* If compiling with GCC or clang, this file is not needed.  */
+#if !(defined __GNUC__ || defined __clang__)
+
+/* If someone has defined alloca as a macro,
+   there must be some other way alloca is supposed to work.  */
+# ifndef alloca
+
+#  ifdef emacs
+#   ifdef static
+/* actually, only want this if static is defined as ""
+   -- this is for usg, in which emacs must undefine static
+   in order to make unexec workable
+   */
+#    ifndef STACK_DIRECTION
+you
+lose
+-- must know STACK_DIRECTION at compile-time
+/* Using #error here is not wise since this file should work for
+   old and obscure compilers.  */
+#    endif /* STACK_DIRECTION undefined */
+#   endif /* static */
+#  endif /* emacs */
+
+/* Define STACK_DIRECTION if you know the direction of stack
+   growth for your system; otherwise it will be automatically
+   deduced at run-time.
+
+   STACK_DIRECTION > 0 => grows toward higher addresses
+   STACK_DIRECTION < 0 => grows toward lower addresses
+   STACK_DIRECTION = 0 => direction of growth unknown  */
+
+#  ifndef STACK_DIRECTION
+#   define STACK_DIRECTION      0       /* Direction unknown.  */
+#  endif
+
+#  if STACK_DIRECTION != 0
+
+#   define STACK_DIR    STACK_DIRECTION /* Known at compile-time.  */
+
+#  else /* STACK_DIRECTION == 0; need run-time code.  */
+
+static int stack_dir;           /* 1 or -1 once known.  */
+#   define STACK_DIR    stack_dir
+
+static int
+find_stack_direction (int *addr, int depth)
+{
+  int dir, dummy = 0;
+  if (! addr)
+    addr = &dummy;
+  *addr = addr < &dummy ? 1 : addr == &dummy ? 0 : -1;
+  dir = depth ? find_stack_direction (addr, depth - 1) : 0;
+  return dir + dummy;
+}
+
+#  endif /* STACK_DIRECTION == 0 */
+
+/* An "alloca header" is used to:
+   (a) chain together all alloca'ed blocks;
+   (b) keep track of stack depth.
+
+   It is very important that sizeof(header) agree with malloc
+   alignment chunk size.  The following default should work okay.  */
+
+#  ifndef       ALIGN_SIZE
+#   define ALIGN_SIZE   sizeof(double)
+#  endif
+
+typedef union hdr
+{
+  char align[ALIGN_SIZE];       /* To force sizeof(header).  */
+  struct
+    {
+      union hdr *next;          /* For chaining headers.  */
+      char *deep;               /* For stack depth measure.  */
+    } h;
+} header;
+
+static header *last_alloca_header = NULL;       /* -> last alloca header.  */
+
+/* Return a pointer to at least SIZE bytes of storage,
+   which will be automatically reclaimed upon exit from
+   the procedure that called alloca.  Originally, this space
+   was supposed to be taken from the current stack frame of the
+   caller, but that method cannot be made to work for some
+   implementations of C, for example under Gould's UTX/32.  */
+
+void *
+alloca (size_t size)
+{
+  auto char probe;              /* Probes stack depth: */
+  register char *depth = &probe;
+
+#  if STACK_DIRECTION == 0
+  if (STACK_DIR == 0)           /* Unknown growth direction.  */
+    STACK_DIR = find_stack_direction (NULL, (size & 1) + 20);
+#  endif
+
+  /* Reclaim garbage, defined as all alloca'd storage that
+     was allocated from deeper in the stack than currently.  */
+
+  {
+    register header *hp;        /* Traverses linked list.  */
+
+#  ifdef emacs
+    BLOCK_INPUT;
+#  endif
+
+    for (hp = last_alloca_header; hp != NULL;)
+      if ((STACK_DIR > 0 && hp->h.deep > depth)
+          || (STACK_DIR < 0 && hp->h.deep < depth))
+        {
+          register header *np = hp->h.next;
+
+          free (hp);            /* Collect garbage.  */
+
+          hp = np;              /* -> next header.  */
+        }
+      else
+        break;                  /* Rest are not deeper.  */
+
+    last_alloca_header = hp;    /* -> last valid storage.  */
+
+#  ifdef emacs
+    UNBLOCK_INPUT;
+#  endif
+  }
+
+  if (size == 0)
+    return NULL;                /* No allocation required.  */
+
+  /* Allocate combined header + user data storage.  */
+
+  {
+    /* Address of header.  */
+    register header *new;
+
+    size_t combined_size = sizeof (header) + size;
+    if (combined_size < sizeof (header))
+      memory_full ();
+
+    new = malloc (combined_size);
+
+    if (! new)
+      memory_full ();
+
+    new->h.next = last_alloca_header;
+    new->h.deep = depth;
+
+    last_alloca_header = new;
+
+    /* User storage begins just after header.  */
+
+    return (void *) (new + 1);
+  }
+}
+
+# endif /* no alloca */
+#endif /* not GCC || clang */
diff --git a/src/grep/lib/alloca.in.h b/src/grep/lib/alloca.in.h
new file mode 100644
index 0000000..65c2d4d
--- /dev/null
+++ b/src/grep/lib/alloca.in.h
@@ -0,0 +1,72 @@
+/* Memory allocation on the stack.
+
+   Copyright (C) 1995, 1999, 2001-2004, 2006-2021 Free Software Foundation,
+   Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Avoid using the symbol _ALLOCA_H here, as Bison assumes _ALLOCA_H
+   means there is a real alloca function.  */
+#ifndef _GL_ALLOCA_H
+#define _GL_ALLOCA_H
+
+/* alloca (N) returns a pointer to N bytes of memory
+   allocated on the stack, which will last until the function returns.
+   Use of alloca should be avoided:
+     - inside arguments of function calls - undefined behaviour,
+     - in inline functions - the allocation may actually last until the
+       calling function returns,
+     - for huge N (say, N >= 65536) - you never know how large (or small)
+       the stack is, and when the stack cannot fulfill the memory allocation
+       request, the program just crashes.
+ */
+
+#ifndef alloca
+  /* Some version of mingw have an <alloca.h> that causes trouble when
+     included after 'alloca' gets defined as a macro.  As a workaround,
+     include this <alloca.h> first and define 'alloca' as a macro afterwards
+     if needed.  */
+# if defined __GNUC__ && (defined _WIN32 && ! defined __CYGWIN__) && @HAVE_ALLOCA_H@
+#  include_next <alloca.h>
+# endif
+#endif
+#ifndef alloca
+# if defined __GNUC__ || (__clang_major__ >= 4)
+#  define alloca __builtin_alloca
+# elif defined _AIX
+#  define alloca __alloca
+# elif defined _MSC_VER
+#  include <malloc.h>
+#  define alloca _alloca
+# elif defined __DECC && defined __VMS
+#  define alloca __ALLOCA
+# elif defined __TANDEM && defined _TNS_E_TARGET
+#  ifdef  __cplusplus
+extern "C"
+#  endif
+void *_alloca (unsigned short);
+#  pragma intrinsic (_alloca)
+#  define alloca _alloca
+# elif defined __MVS__
+#  include <stdlib.h>
+# else
+#  include <stddef.h>
+#  ifdef  __cplusplus
+extern "C"
+#  endif
+void *alloca (size_t);
+# endif
+#endif
+
+#endif /* _GL_ALLOCA_H */
diff --git a/src/grep/lib/arg-nonnull.h b/src/grep/lib/arg-nonnull.h
new file mode 100644
index 0000000..b4de241
--- /dev/null
+++ b/src/grep/lib/arg-nonnull.h
@@ -0,0 +1,26 @@
+/* A C macro for declaring that specific arguments must not be NULL.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as published
+   by the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* _GL_ARG_NONNULL((n,...,m)) tells the compiler and static analyzer tools
+   that the values passed as arguments n, ..., m must be non-NULL pointers.
+   n = 1 stands for the first argument, n = 2 for the second argument etc.  */
+#ifndef _GL_ARG_NONNULL
+# if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || defined __clang__
+#  define _GL_ARG_NONNULL(params) __attribute__ ((__nonnull__ params))
+# else
+#  define _GL_ARG_NONNULL(params)
+# endif
+#endif
diff --git a/src/grep/lib/argmatch.c b/src/grep/lib/argmatch.c
new file mode 100644
index 0000000..dfdb4e3
--- /dev/null
+++ b/src/grep/lib/argmatch.c
@@ -0,0 +1,273 @@
+/* argmatch.c -- find a match for a string in an array
+
+   Copyright (C) 1990, 1998-1999, 2001-2007, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by David MacKenzie <djm@ai.mit.edu>
+   Modified by Akim Demaille <demaille@inf.enst.fr> */
+
+#include <config.h>
+
+/* Specification.  */
+#include "argmatch.h"
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define _(msgid) gettext (msgid)
+
+#include "error.h"
+#include "quotearg.h"
+#include "getprogname.h"
+
+#if USE_UNLOCKED_IO
+# include "unlocked-io.h"
+#endif
+
+/* When reporting an invalid argument, show nonprinting characters
+   by using the quoting style ARGMATCH_QUOTING_STYLE.  Do not use
+   literal_quoting_style.  */
+#ifndef ARGMATCH_QUOTING_STYLE
+# define ARGMATCH_QUOTING_STYLE locale_quoting_style
+#endif
+
+/* Non failing version of argmatch call this function after failing. */
+#ifndef ARGMATCH_DIE
+# include "exitfail.h"
+# define ARGMATCH_DIE exit (exit_failure)
+#endif
+
+#ifdef ARGMATCH_DIE_DECL
+ARGMATCH_DIE_DECL;
+#endif
+
+static void
+__argmatch_die (void)
+{
+  ARGMATCH_DIE;
+}
+
+/* Used by XARGMATCH and XARGCASEMATCH.  See description in argmatch.h.
+   Default to __argmatch_die, but allow caller to change this at run-time. */
+argmatch_exit_fn argmatch_die = __argmatch_die;
+
+
+/* If ARG is an unambiguous match for an element of the
+   NULL-terminated array ARGLIST, return the index in ARGLIST
+   of the matched element, else -1 if it does not match any element
+   or -2 if it is ambiguous (is a prefix of more than one element).
+
+   If VALLIST is none null, use it to resolve ambiguities limited to
+   synonyms, i.e., for
+     "yes", "yop" -> 0
+     "no", "nope" -> 1
+   "y" is a valid argument, for 0, and "n" for 1.  */
+
+ptrdiff_t
+argmatch (const char *arg, const char *const *arglist,
+          const void *vallist, size_t valsize)
+{
+  size_t i;                     /* Temporary index in ARGLIST.  */
+  size_t arglen;                /* Length of ARG.  */
+  ptrdiff_t matchind = -1;      /* Index of first nonexact match.  */
+  bool ambiguous = false;       /* If true, multiple nonexact match(es).  */
+
+  arglen = strlen (arg);
+
+  /* Test all elements for either exact match or abbreviated matches.  */
+  for (i = 0; arglist[i]; i++)
+    {
+      if (!strncmp (arglist[i], arg, arglen))
+        {
+          if (strlen (arglist[i]) == arglen)
+            /* Exact match found.  */
+            return i;
+          else if (matchind == -1)
+            /* First nonexact match found.  */
+            matchind = i;
+          else
+            {
+              /* Second nonexact match found.  */
+              if (vallist == NULL
+                  || memcmp ((char const *) vallist + valsize * matchind,
+                             (char const *) vallist + valsize * i, valsize))
+                {
+                  /* There is a real ambiguity, or we could not
+                     disambiguate. */
+                  ambiguous = true;
+                }
+            }
+        }
+    }
+  if (ambiguous)
+    return -2;
+  else
+    return matchind;
+}
+
+/* Error reporting for argmatch.
+   CONTEXT is a description of the type of entity that was being matched.
+   VALUE is the invalid value that was given.
+   PROBLEM is the return value from argmatch.  */
+
+void
+argmatch_invalid (const char *context, const char *value, ptrdiff_t problem)
+{
+  char const *format = (problem == -1
+                        ? _("invalid argument %s for %s")
+                        : _("ambiguous argument %s for %s"));
+
+  error (0, 0, format, quotearg_n_style (0, ARGMATCH_QUOTING_STYLE, value),
+         quote_n (1, context));
+}
+
+/* List the valid arguments for argmatch.
+   ARGLIST is the same as in argmatch.
+   VALLIST is a pointer to an array of values.
+   VALSIZE is the size of the elements of VALLIST */
+void
+argmatch_valid (const char *const *arglist,
+                const void *vallist, size_t valsize)
+{
+  size_t i;
+  const char *last_val = NULL;
+
+  /* We try to put synonyms on the same line.  The assumption is that
+     synonyms follow each other */
+  fputs (_("Valid arguments are:"), stderr);
+  for (i = 0; arglist[i]; i++)
+    if ((i == 0)
+        || memcmp (last_val, (char const *) vallist + valsize * i, valsize))
+      {
+        fprintf (stderr, "\n  - %s", quote (arglist[i]));
+        last_val = (char const *) vallist + valsize * i;
+      }
+    else
+      {
+        fprintf (stderr, ", %s", quote (arglist[i]));
+      }
+  putc ('\n', stderr);
+}
+
+/* Never failing versions of the previous functions.
+
+   CONTEXT is the context for which argmatch is called (e.g.,
+   "--version-control", or "$VERSION_CONTROL" etc.).  Upon failure,
+   calls the (supposed never to return) function EXIT_FN. */
+
+ptrdiff_t
+__xargmatch_internal (const char *context,
+                      const char *arg, const char *const *arglist,
+                      const void *vallist, size_t valsize,
+                      argmatch_exit_fn exit_fn)
+{
+  ptrdiff_t res = argmatch (arg, arglist, vallist, valsize);
+  if (res >= 0)
+    /* Success. */
+    return res;
+
+  /* We failed.  Explain why. */
+  argmatch_invalid (context, arg, res);
+  argmatch_valid (arglist, vallist, valsize);
+  (*exit_fn) ();
+
+  return -1; /* To please the compilers. */
+}
+
+/* Look for VALUE in VALLIST, an array of objects of size VALSIZE and
+   return the first corresponding argument in ARGLIST */
+const char *
+argmatch_to_argument (const void *value,
+                      const char *const *arglist,
+                      const void *vallist, size_t valsize)
+{
+  size_t i;
+
+  for (i = 0; arglist[i]; i++)
+    if (!memcmp (value, (char const *) vallist + valsize * i, valsize))
+      return arglist[i];
+  return NULL;
+}
+
+#ifdef TEST
+/*
+ * Based on "getversion.c" by David MacKenzie <djm@gnu.ai.mit.edu>
+ */
+
+/* When to make backup files.  */
+enum backup_type
+{
+  /* Never make backups.  */
+  no_backups,
+
+  /* Make simple backups of every file.  */
+  simple_backups,
+
+  /* Make numbered backups of files that already have numbered backups,
+     and simple backups of the others.  */
+  numbered_existing_backups,
+
+  /* Make numbered backups of every file.  */
+  numbered_backups
+};
+
+/* Two tables describing arguments (keys) and their corresponding
+   values */
+static const char *const backup_args[] =
+{
+  "no", "none", "off",
+  "simple", "never",
+  "existing", "nil",
+  "numbered", "t",
+  0
+};
+
+static const enum backup_type backup_vals[] =
+{
+  no_backups, no_backups, no_backups,
+  simple_backups, simple_backups,
+  numbered_existing_backups, numbered_existing_backups,
+  numbered_backups, numbered_backups
+};
+
+int
+main (int argc, const char *const *argv)
+{
+  const char *cp;
+  enum backup_type backup_type = no_backups;
+
+  if (argc > 2)
+    {
+      fprintf (stderr, "Usage: %s [VERSION_CONTROL]\n", getprogname ());
+      exit (1);
+    }
+
+  if ((cp = getenv ("VERSION_CONTROL")))
+    backup_type = XARGMATCH ("$VERSION_CONTROL", cp,
+                             backup_args, backup_vals);
+
+  if (argc == 2)
+    backup_type = XARGMATCH (getprogname (), argv[1],
+                             backup_args, backup_vals);
+
+  printf ("The version control is '%s'\n",
+          ARGMATCH_TO_ARGUMENT (&backup_type, backup_args, backup_vals));
+
+  return 0;
+}
+#endif
diff --git a/src/grep/lib/argmatch.h b/src/grep/lib/argmatch.h
new file mode 100644
index 0000000..3ef6813
--- /dev/null
+++ b/src/grep/lib/argmatch.h
@@ -0,0 +1,331 @@
+/* argmatch.h -- definitions and prototypes for argmatch.c
+
+   Copyright (C) 1990, 1998-1999, 2001-2002, 2004-2005, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by David MacKenzie <djm@ai.mit.edu>
+   Modified by Akim Demaille <demaille@inf.enst.fr> */
+
+#ifndef ARGMATCH_H_
+# define ARGMATCH_H_ 1
+
+# include <limits.h>
+# include <stdbool.h>
+# include <stddef.h>
+# include <stdio.h>
+# include <string.h> /* memcmp */
+
+# include "gettext.h"
+# include "quote.h"
+# include "verify.h"
+
+# ifdef  __cplusplus
+extern "C" {
+# endif
+
+# define ARRAY_CARDINALITY(Array) (sizeof (Array) / sizeof *(Array))
+
+/* Assert there are as many real arguments as there are values
+   (argument list ends with a NULL guard).  */
+
+# define ARGMATCH_VERIFY(Arglist, Vallist) \
+    verify (ARRAY_CARDINALITY (Arglist) == ARRAY_CARDINALITY (Vallist) + 1)
+
+/* Return the index of the element of ARGLIST (NULL terminated) that
+   matches with ARG.  If VALLIST is not NULL, then use it to resolve
+   false ambiguities (i.e., different matches of ARG but corresponding
+   to the same values in VALLIST).  */
+
+ptrdiff_t argmatch (char const *arg, char const *const *arglist,
+                    void const *vallist, size_t valsize) _GL_ATTRIBUTE_PURE;
+
+# define ARGMATCH(Arg, Arglist, Vallist) \
+  argmatch (Arg, Arglist, (void const *) (Vallist), sizeof *(Vallist))
+
+/* xargmatch calls this function when it fails.  This function should not
+   return.  By default, this is a function that calls ARGMATCH_DIE which
+   in turn defaults to 'exit (exit_failure)'.  */
+typedef void (*argmatch_exit_fn) (void);
+extern argmatch_exit_fn argmatch_die;
+
+/* Report on stderr why argmatch failed.  Report correct values. */
+
+void argmatch_invalid (char const *context, char const *value,
+                       ptrdiff_t problem);
+
+/* Left for compatibility with the old name invalid_arg */
+
+# define invalid_arg(Context, Value, Problem) \
+  argmatch_invalid (Context, Value, Problem)
+
+
+
+/* Report on stderr the list of possible arguments.  */
+
+void argmatch_valid (char const *const *arglist,
+                     void const *vallist, size_t valsize);
+
+# define ARGMATCH_VALID(Arglist, Vallist) \
+  argmatch_valid (Arglist, (void const *) (Vallist), sizeof *(Vallist))
+
+
+
+/* Same as argmatch, but upon failure, report an explanation of the
+   failure, and exit using the function EXIT_FN. */
+
+ptrdiff_t __xargmatch_internal (char const *context,
+                                char const *arg, char const *const *arglist,
+                                void const *vallist, size_t valsize,
+                                argmatch_exit_fn exit_fn);
+
+/* Programmer friendly interface to __xargmatch_internal. */
+
+# define XARGMATCH(Context, Arg, Arglist, Vallist)              \
+  ((Vallist) [__xargmatch_internal (Context, Arg, Arglist,      \
+                                    (void const *) (Vallist),   \
+                                    sizeof *(Vallist),          \
+                                    argmatch_die)])
+
+/* Convert a value into a corresponding argument. */
+
+char const *argmatch_to_argument (void const *value,
+                                  char const *const *arglist,
+                                  void const *vallist, size_t valsize)
+  _GL_ATTRIBUTE_PURE;
+
+# define ARGMATCH_TO_ARGUMENT(Value, Arglist, Vallist)                  \
+  argmatch_to_argument (Value, Arglist,                                 \
+                        (void const *) (Vallist), sizeof *(Vallist))
+
+# define ARGMATCH_DEFINE_GROUP(Name, Type)                              \
+  /* The type of the values of this group.  */                          \
+  typedef Type argmatch_##Name##_type;                                  \
+                                                                        \
+  /* The size of the type of the values of this group. */               \
+  enum argmatch_##Name##_size_enum                                      \
+  {                                                                     \
+    argmatch_##Name##_size = sizeof (argmatch_##Name##_type)            \
+  };                                                                    \
+                                                                        \
+  /* Argument mapping of this group.  */                                \
+  typedef struct                                                        \
+  {                                                                     \
+    /* Argument (e.g., "simple").  */                                   \
+    const char *arg;                                                    \
+    /* Value (e.g., simple_backups).  */                                \
+    const argmatch_##Name##_type val;                                   \
+  } argmatch_##Name##_arg;                                              \
+                                                                        \
+  /* Documentation of this group.  */                                   \
+  typedef struct                                                        \
+  {                                                                     \
+    /* Argument (e.g., "simple").  */                                   \
+    const char *arg;                                                    \
+    /* Documentation (e.g., N_("always make simple backups")).  */      \
+    const char *doc;                                                    \
+  } argmatch_##Name##_doc;                                              \
+                                                                        \
+  /* All the features of an argmatch group.  */                         \
+  typedef struct                                                        \
+  {                                                                     \
+    const argmatch_##Name##_arg* args;                                  \
+    const argmatch_##Name##_doc* docs;                                  \
+                                                                        \
+    /* Printed before the usage message.  */                            \
+    const char *doc_pre;                                                \
+    /* Printed after the usage message.  */                             \
+    const char *doc_post;                                               \
+  } argmatch_##Name##_group_type;                                       \
+                                                                        \
+  /* The structure the user must build.  */                             \
+  extern const argmatch_##Name##_group_type argmatch_##Name##_group;    \
+                                                                        \
+  /* Print the documentation of this group.  */                         \
+  void argmatch_##Name##_usage (FILE *out);                             \
+                                                                        \
+  /* If nonnegative, the index I of ARG in ARGS, i.e,                   \
+     ARGS[I] == ARG.                                                    \
+     Return -1 for invalid argument, -2 for ambiguous argument. */      \
+  ptrdiff_t argmatch_##Name##_choice (const char *arg);                 \
+                                                                        \
+  /* A pointer to the corresponding value if it exists, or              \
+     report an error and exit with failure if the argument was          \
+     not recognized. */                                                 \
+  const argmatch_##Name##_type*                                         \
+  argmatch_##Name##_value (const char *context, const char *arg);       \
+                                                                        \
+  /* The first argument in ARGS that matches this value, or NULL.  */   \
+  const char *                                                          \
+  argmatch_##Name##_argument (const argmatch_##Name##_type *val);       \
+                                                                        \
+  ptrdiff_t                                                             \
+  argmatch_##Name##_choice (const char *arg)                            \
+  {                                                                     \
+    const argmatch_##Name##_group_type *g = &argmatch_##Name##_group;   \
+    size_t size = argmatch_##Name##_size;                               \
+    ptrdiff_t res = -1;      /* Index of first nonexact match.  */      \
+    bool ambiguous = false;  /* Whether multiple nonexact match(es). */ \
+    size_t arglen = strlen (arg);                                       \
+                                                                        \
+    /* Test all elements for either exact match or abbreviated          \
+       matches.  */                                                     \
+    for (size_t i = 0; g->args[i].arg; i++)                             \
+      if (!strncmp (g->args[i].arg, arg, arglen))                       \
+        {                                                               \
+          if (strlen (g->args[i].arg) == arglen)                        \
+            /* Exact match found.  */                                   \
+            return i;                                                   \
+          else if (res == -1)                                           \
+            /* First nonexact match found.  */                          \
+            res = i;                                                    \
+          else if (memcmp (&g->args[res].val, &g->args[i].val, size))   \
+            /* Second nonexact match found.  */                         \
+            /* There is a real ambiguity, or we could not               \
+               disambiguate. */                                         \
+            ambiguous = true;                                           \
+        }                                                               \
+    return ambiguous ? -2 : res;                                        \
+  }                                                                     \
+                                                                        \
+  const char *                                                          \
+  argmatch_##Name##_argument (const argmatch_##Name##_type *val)        \
+  {                                                                     \
+    const argmatch_##Name##_group_type *g = &argmatch_##Name##_group;   \
+    size_t size = argmatch_##Name##_size;                               \
+    for (size_t i = 0; g->args[i].arg; i++)                             \
+      if (!memcmp (val, &g->args[i].val, size))                         \
+        return g->args[i].arg;                                          \
+    return NULL;                                                        \
+  }                                                                     \
+                                                                        \
+  /* List the valid values of this group. */                            \
+  static void                                                           \
+  argmatch_##Name##_valid (FILE *out)                                   \
+  {                                                                     \
+    const argmatch_##Name##_group_type *g = &argmatch_##Name##_group;   \
+    size_t size = argmatch_##Name##_size;                               \
+                                                                        \
+    /* Try to put synonyms on the same line.  Synonyms are expected     \
+       to follow each other. */                                         \
+    fputs (gettext ("Valid arguments are:"), out);                      \
+    for (int i = 0; g->args[i].arg; i++)                                \
+      if (i == 0                                                        \
+          || memcmp (&g->args[i-1].val, &g->args[i].val, size))         \
+        fprintf (out, "\n  - %s", quote (g->args[i].arg));              \
+      else                                                              \
+        fprintf (out, ", %s", quote (g->args[i].arg));                  \
+    putc ('\n', out);                                                   \
+  }                                                                     \
+                                                                        \
+  const argmatch_##Name##_type*                                         \
+  argmatch_##Name##_value (const char *context, const char *arg)        \
+  {                                                                     \
+    const argmatch_##Name##_group_type *g = &argmatch_##Name##_group;   \
+    ptrdiff_t res = argmatch_##Name##_choice (arg);                     \
+    if (res < 0)                                                        \
+      {                                                                 \
+        argmatch_invalid (context, arg, res);                           \
+        argmatch_##Name##_valid (stderr);                               \
+        argmatch_die ();                                                \
+      }                                                                 \
+    return &g->args[res].val;                                           \
+  }                                                                     \
+                                                                        \
+  /* The column in which the documentation is displayed.                \
+     The leftmost possible, but no more than 20. */                     \
+  static int                                                            \
+  argmatch_##Name##_doc_col (void)                                      \
+  {                                                                     \
+    const argmatch_##Name##_group_type *g = &argmatch_##Name##_group;   \
+    size_t size = argmatch_##Name##_size;                               \
+    int res = 0;                                                        \
+    for (int i = 0; g->docs[i].arg; ++i)                                \
+      {                                                                 \
+        int col = 4;                                                    \
+        int ival = argmatch_##Name##_choice (g->docs[i].arg);           \
+        if (ival < 0)                                                   \
+          /* Pseudo argument, display it. */                            \
+          col += strlen (g->docs[i].arg);                               \
+        else                                                            \
+          /* Genuine argument, display it with its synonyms. */         \
+          for (int j = 0; g->args[j].arg; ++j)                          \
+            if (! memcmp (&g->args[ival].val, &g->args[j].val, size))   \
+              col += (col == 4 ? 0 : 2) + strlen (g->args[j].arg);      \
+        if (res <= col)                                                 \
+          res = col <= 20 ? col : 20;                                   \
+      }                                                                 \
+    return res ? res : 20;                                              \
+  }                                                                     \
+                                                                        \
+  void                                                                  \
+  argmatch_##Name##_usage (FILE *out)                                   \
+  {                                                                     \
+    const argmatch_##Name##_group_type *g = &argmatch_##Name##_group;   \
+    size_t size = argmatch_##Name##_size;                               \
+    /* Width of the screen.  Help2man does not seem to support          \
+       arguments on several lines, so in that case pretend a very       \
+       large width. */                                                  \
+    const int screen_width = getenv ("HELP2MAN") ? INT_MAX : 80;        \
+    if (g->doc_pre)                                                     \
+      fprintf (out, "%s\n", gettext (g->doc_pre));                      \
+    int doc_col = argmatch_##Name##_doc_col ();                         \
+    for (int i = 0; g->docs[i].arg; ++i)                                \
+      {                                                                 \
+        int col = 0;                                                    \
+        bool first = true;                                              \
+        int ival = argmatch_##Name##_choice (g->docs[i].arg);           \
+        if (ival < 0)                                                   \
+          /* Pseudo argument, display it. */                            \
+          col += fprintf (out,  "  %s", g->docs[i].arg);                \
+        else                                                            \
+          /* Genuine argument, display it with its synonyms. */         \
+          for (int j = 0; g->args[j].arg; ++j)                          \
+            if (! memcmp (&g->args[ival].val, &g->args[j].val, size))   \
+              {                                                         \
+                if (!first                                              \
+                    && screen_width < col + 2 + strlen (g->args[j].arg)) \
+                  {                                                     \
+                    fprintf (out, ",\n");                               \
+                    col = 0;                                            \
+                    first = true;                                       \
+                  }                                                     \
+                if (first)                                              \
+                  {                                                     \
+                    col += fprintf (out, " ");                          \
+                    first = false;                                      \
+                  }                                                     \
+                else                                                    \
+                  col += fprintf (out, ",");                            \
+                col += fprintf (out,  " %s", g->args[j].arg);           \
+              }                                                         \
+        /* The doc.  Separated by at least two spaces. */               \
+        if (doc_col < col + 2)                                          \
+          {                                                             \
+            fprintf (out, "\n");                                        \
+            col = 0;                                                    \
+          }                                                             \
+        fprintf (out, "%*s%s\n",                                        \
+                 doc_col - col, "", gettext (g->docs[i].doc));          \
+      }                                                                 \
+    if (g->doc_post)                                                    \
+      fprintf (out, "%s\n", gettext (g->doc_post));                     \
+  }
+
+# ifdef  __cplusplus
+}
+# endif
+
+#endif /* ARGMATCH_H_ */
diff --git a/src/grep/lib/assure.h b/src/grep/lib/assure.h
new file mode 100644
index 0000000..49aa82f
--- /dev/null
+++ b/src/grep/lib/assure.h
@@ -0,0 +1,57 @@
+/* Run-time assert-like macros.
+
+   Copyright (C) 2014-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+#ifndef _GL_ASSURE_H
+#define _GL_ASSURE_H
+
+#include <assert.h>
+#include "verify.h"
+
+/* Evaluate an assertion E that is guaranteed to be true.
+   If NDEBUG is not defined, abort the program if E is false.
+   If NDEBUG is defined, the compiler can assume E and behavior is
+   undefined if E is false, fails to evaluate, or has side effects.
+
+   Unlike standard 'assert', this macro evaluates E even when NDEBUG
+   is defined, so as to catch typos, avoid some GCC warnings, and
+   improve performance when E is simple enough.
+
+   Also see the documentation for 'assume' in verify.h.  */
+
+#ifdef NDEBUG
+# define affirm(E) assume (E)
+#else
+# define affirm(E) assert (E)
+#endif
+
+/* Check E's value at runtime, and report an error and abort if not.
+   However, do nothing if NDEBUG is defined.
+
+   Unlike standard 'assert', this macro compiles E even when NDEBUG
+   is defined, so as to catch typos and avoid some GCC warnings.
+   Unlike 'affirm', it is OK for E to use hard-to-optimize features,
+   since E is not executed if NDEBUG is defined.  */
+
+#ifdef NDEBUG
+# define assure(E) ((void) (0 && (E)))
+#else
+# define assure(E) assert (E)
+#endif
+
+#endif
diff --git a/src/grep/lib/at-func.c b/src/grep/lib/at-func.c
new file mode 100644
index 0000000..b6d9de7
--- /dev/null
+++ b/src/grep/lib/at-func.c
@@ -0,0 +1,146 @@
+/* Define at-style functions like fstatat, unlinkat, fchownat, etc.
+   Copyright (C) 2006, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering */
+
+#include "filename.h" /* solely for definition of IS_ABSOLUTE_FILE_NAME */
+
+#ifdef GNULIB_SUPPORT_ONLY_AT_FDCWD
+# include <errno.h>
+# ifndef ENOTSUP
+#  define ENOTSUP EINVAL
+# endif
+#else
+# include "openat.h"
+# include "openat-priv.h"
+# include "save-cwd.h"
+#endif
+
+#ifdef AT_FUNC_USE_F1_COND
+# define CALL_FUNC(F)                           \
+  (flag == AT_FUNC_USE_F1_COND                  \
+    ? AT_FUNC_F1 (F AT_FUNC_POST_FILE_ARGS)     \
+    : AT_FUNC_F2 (F AT_FUNC_POST_FILE_ARGS))
+# define VALIDATE_FLAG(F)                       \
+  if (flag & ~AT_FUNC_USE_F1_COND)              \
+    {                                           \
+      errno = EINVAL;                           \
+      return FUNC_FAIL;                         \
+    }
+#else
+# define CALL_FUNC(F) (AT_FUNC_F1 (F AT_FUNC_POST_FILE_ARGS))
+# define VALIDATE_FLAG(F) /* empty */
+#endif
+
+#ifdef AT_FUNC_RESULT
+# define FUNC_RESULT AT_FUNC_RESULT
+#else
+# define FUNC_RESULT int
+#endif
+
+#ifdef AT_FUNC_FAIL
+# define FUNC_FAIL AT_FUNC_FAIL
+#else
+# define FUNC_FAIL -1
+#endif
+
+/* Call AT_FUNC_F1 to operate on FILE, which is in the directory
+   open on descriptor FD.  If AT_FUNC_USE_F1_COND is defined to a value,
+   AT_FUNC_POST_FILE_PARAM_DECLS must include a parameter named flag;
+   call AT_FUNC_F2 if FLAG is 0 or fail if FLAG contains more bits than
+   AT_FUNC_USE_F1_COND.  Return int and fail with -1 unless AT_FUNC_RESULT
+   or AT_FUNC_FAIL are defined.  If possible, do it without changing the
+   working directory.  Otherwise, resort to using save_cwd/fchdir,
+   then AT_FUNC_F?/restore_cwd.  If either the save_cwd or the restore_cwd
+   fails, then give a diagnostic and exit nonzero.  */
+FUNC_RESULT
+AT_FUNC_NAME (int fd, char const *file AT_FUNC_POST_FILE_PARAM_DECLS)
+{
+  VALIDATE_FLAG (flag);
+
+  if (fd == AT_FDCWD || IS_ABSOLUTE_FILE_NAME (file))
+    return CALL_FUNC (file);
+
+#ifdef GNULIB_SUPPORT_ONLY_AT_FDCWD
+  errno = ENOTSUP;
+  return FUNC_FAIL;
+#else
+  {
+  /* Be careful to choose names unlikely to conflict with
+     AT_FUNC_POST_FILE_PARAM_DECLS.  */
+  struct saved_cwd saved_cwd;
+  int saved_errno;
+  FUNC_RESULT err;
+
+  {
+    char proc_buf[OPENAT_BUFFER_SIZE];
+    char *proc_file = openat_proc_name (proc_buf, fd, file);
+    if (proc_file)
+      {
+        FUNC_RESULT proc_result = CALL_FUNC (proc_file);
+        int proc_errno = errno;
+        if (proc_file != proc_buf)
+          free (proc_file);
+        /* If the syscall succeeds, or if it fails with an unexpected
+           errno value, then return right away.  Otherwise, fall through
+           and resort to using save_cwd/restore_cwd.  */
+        if (FUNC_FAIL != proc_result)
+          return proc_result;
+        if (! EXPECTED_ERRNO (proc_errno))
+          {
+            errno = proc_errno;
+            return proc_result;
+          }
+      }
+  }
+
+  if (save_cwd (&saved_cwd) != 0)
+    openat_save_fail (errno);
+  if (0 <= fd && fd == saved_cwd.desc)
+    {
+      /* If saving the working directory collides with the user's
+         requested fd, then the user's fd must have been closed to
+         begin with.  */
+      free_cwd (&saved_cwd);
+      errno = EBADF;
+      return FUNC_FAIL;
+    }
+
+  if (fchdir (fd) != 0)
+    {
+      saved_errno = errno;
+      free_cwd (&saved_cwd);
+      errno = saved_errno;
+      return FUNC_FAIL;
+    }
+
+  err = CALL_FUNC (file);
+  saved_errno = (err == FUNC_FAIL ? errno : 0);
+
+  if (restore_cwd (&saved_cwd) != 0)
+    openat_restore_fail (errno);
+
+  free_cwd (&saved_cwd);
+
+  if (saved_errno)
+    errno = saved_errno;
+  return err;
+  }
+#endif
+}
+#undef CALL_FUNC
+#undef FUNC_RESULT
+#undef FUNC_FAIL
diff --git a/src/grep/lib/attribute.h b/src/grep/lib/attribute.h
new file mode 100644
index 0000000..80a23f5
--- /dev/null
+++ b/src/grep/lib/attribute.h
@@ -0,0 +1,218 @@
+/* ATTRIBUTE_* macros for using attributes in GCC and similar compilers
+
+   Copyright 2020-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+/* Provide public ATTRIBUTE_* names for the private _GL_ATTRIBUTE_*
+   macros used within Gnulib.  */
+
+/* These attributes can be placed in two ways:
+     - At the start of a declaration (i.e. even before storage-class
+       specifiers!); then they apply to all entities that are declared
+       by the declaration.
+     - Immediately after the name of an entity being declared by the
+       declaration; then they apply to that entity only.  */
+
+#ifndef _GL_ATTRIBUTE_H
+#define _GL_ATTRIBUTE_H
+
+
+/* This file defines two types of attributes:
+   * C2x standard attributes.  These have macro names that do not begin with
+     'ATTRIBUTE_'.
+   * Selected GCC attributes; see:
+     https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html
+     https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html
+     https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html
+     These names begin with 'ATTRIBUTE_' to avoid name clashes.  */
+
+
+/* =============== Attributes for specific kinds of functions =============== */
+
+/* Attributes for functions that should not be used.  */
+
+/* Warn if the entity is used.  */
+/* Applies to:
+     - function, variable,
+     - struct, union, struct/union member,
+     - enumeration, enumeration item,
+     - typedef,
+   in C++ also: namespace, class, template specialization.  */
+#define DEPRECATED _GL_ATTRIBUTE_DEPRECATED
+
+/* If a function call is not optimized way, warn with MSG.  */
+/* Applies to: functions.  */
+#define ATTRIBUTE_WARNING(msg) _GL_ATTRIBUTE_WARNING (msg)
+
+/* If a function call is not optimized way, report an error with MSG.  */
+/* Applies to: functions.  */
+#define ATTRIBUTE_ERROR(msg) _GL_ATTRIBUTE_ERROR (msg)
+
+
+/* Attributes for memory-allocating functions.  */
+
+/* The function returns a pointer to freshly allocated memory.  */
+/* Applies to: functions.  */
+#define ATTRIBUTE_MALLOC _GL_ATTRIBUTE_MALLOC
+
+/* ATTRIBUTE_ALLOC_SIZE ((N)) - The Nth argument of the function
+   is the size of the returned memory block.
+   ATTRIBUTE_ALLOC_SIZE ((M, N)) - Multiply the Mth and Nth arguments
+   to determine the size of the returned memory block.  */
+/* Applies to: function, pointer to function, function types.  */
+#define ATTRIBUTE_ALLOC_SIZE(args) _GL_ATTRIBUTE_ALLOC_SIZE (args)
+
+
+/* Attributes for variadic functions.  */
+
+/* The variadic function expects a trailing NULL argument.
+   ATTRIBUTE_SENTINEL () - The last argument is NULL (requires C99).
+   ATTRIBUTE_SENTINEL ((N)) - The (N+1)st argument from the end is NULL.  */
+/* Applies to: functions.  */
+#define ATTRIBUTE_SENTINEL(pos) _GL_ATTRIBUTE_SENTINEL (pos)
+
+
+/* ================== Attributes for compiler diagnostics ================== */
+
+/* Attributes that help the compiler diagnose programmer mistakes.
+   Some of them may also help for some compiler optimizations.  */
+
+/* ATTRIBUTE_FORMAT ((ARCHETYPE, STRING-INDEX, FIRST-TO-CHECK)) -
+   The STRING-INDEXth function argument is a format string of style
+   ARCHETYPE, which is one of:
+     printf, gnu_printf
+     scanf, gnu_scanf,
+     strftime, gnu_strftime,
+     strfmon,
+   or the same thing prefixed and suffixed with '__'.
+   If FIRST-TO-CHECK is not 0, arguments starting at FIRST-TO_CHECK
+   are suitable for the format string.  */
+/* Applies to: functions.  */
+#define ATTRIBUTE_FORMAT(spec) _GL_ATTRIBUTE_FORMAT (spec)
+
+/* ATTRIBUTE_NONNULL ((N1, N2,...)) - Arguments N1, N2,... must not be NULL.
+   ATTRIBUTE_NONNULL () - All pointer arguments must not be null.  */
+/* Applies to: functions.  */
+#define ATTRIBUTE_NONNULL(args) _GL_ATTRIBUTE_NONNULL (args)
+
+/* The function's return value is a non-NULL pointer.  */
+/* Applies to: functions.  */
+#define ATTRIBUTE_RETURNS_NONNULL _GL_ATTRIBUTE_RETURNS_NONNULL
+
+/* Warn if the caller does not use the return value,
+   unless the caller uses something like ignore_value.  */
+/* Applies to: function, enumeration, class.  */
+#define NODISCARD _GL_ATTRIBUTE_NODISCARD
+
+
+/* Attributes that disable false alarms when the compiler diagnoses
+   programmer "mistakes".  */
+
+/* Do not warn if the entity is not used.  */
+/* Applies to:
+     - function, variable,
+     - struct, union, struct/union member,
+     - enumeration, enumeration item,
+     - typedef,
+   in C++ also: class.  */
+#define MAYBE_UNUSED _GL_ATTRIBUTE_MAYBE_UNUSED
+
+/* The contents of a character array is not meant to be NUL-terminated.  */
+/* Applies to: struct/union members and variables that are arrays of element
+   type '[[un]signed] char'.  */
+#define ATTRIBUTE_NONSTRING _GL_ATTRIBUTE_NONSTRING
+
+/* Do not warn if control flow falls through to the immediately
+   following 'case' or 'default' label.  */
+/* Applies to: Empty statement (;), inside a 'switch' statement.  */
+#define FALLTHROUGH _GL_ATTRIBUTE_FALLTHROUGH
+
+
+/* ================== Attributes for debugging information ================== */
+
+/* Attributes regarding debugging information emitted by the compiler.  */
+
+/* Omit the function from stack traces when debugging.  */
+/* Applies to: function.  */
+#define ATTRIBUTE_ARTIFICIAL _GL_ATTRIBUTE_ARTIFICIAL
+
+/* Make the entity visible to debuggers etc., even with '-fwhole-program'.  */
+/* Applies to: functions, variables.  */
+#define ATTRIBUTE_EXTERNALLY_VISIBLE _GL_ATTRIBUTE_EXTERNALLY_VISIBLE
+
+
+/* ========== Attributes that mainly direct compiler optimizations ========== */
+
+/* The function does not throw exceptions.  */
+/* Applies to: functions.  */
+#define ATTRIBUTE_NOTHROW _GL_ATTRIBUTE_NOTHROW
+
+/* Do not inline the function.  */
+/* Applies to: functions.  */
+#define ATTRIBUTE_NOINLINE _GL_ATTRIBUTE_NOINLINE
+
+/* Always inline the function, and report an error if the compiler
+   cannot inline.  */
+/* Applies to: function.  */
+#define ATTRIBUTE_ALWAYS_INLINE _GL_ATTRIBUTE_ALWAYS_INLINE
+
+/* It is OK for a compiler to omit duplicate calls with the same arguments.
+   This attribute is safe for a function that neither depends on
+   nor affects observable state, and always returns exactly once -
+   e.g., does not loop forever, and does not call longjmp.
+   (This attribute is stricter than ATTRIBUTE_PURE.)  */
+/* Applies to: functions.  */
+#define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST
+
+/* It is OK for a compiler to omit duplicate calls with the same
+   arguments if observable state is not changed between calls.
+   This attribute is safe for a function that does not affect
+   observable state, and always returns exactly once.
+   (This attribute is looser than ATTRIBUTE_CONST.)  */
+/* Applies to: functions.  */
+#define ATTRIBUTE_PURE _GL_ATTRIBUTE_PURE
+
+/* The function is rarely executed.  */
+/* Applies to: functions.  */
+#define ATTRIBUTE_COLD _GL_ATTRIBUTE_COLD
+
+/* If called from some other compilation unit, the function executes
+   code from that unit only by return or by exception handling,
+   letting the compiler optimize that unit more aggressively.  */
+/* Applies to: functions.  */
+#define ATTRIBUTE_LEAF _GL_ATTRIBUTE_LEAF
+
+/* For struct members: The member has the smallest possible alignment.
+   For struct, union, class: All members have the smallest possible alignment,
+   minimizing the memory required.  */
+/* Applies to: struct members, struct, union,
+   in C++ also: class.  */
+#define ATTRIBUTE_PACKED _GL_ATTRIBUTE_PACKED
+
+
+/* ================ Attributes that make invalid code valid ================ */
+
+/* Attributes that prevent fatal compiler optimizations for code that is not
+   fully ISO C compliant.  */
+
+/* Pointers to the type may point to the same storage as pointers to
+   other types, thus disabling strict aliasing optimization.  */
+/* Applies to: types.  */
+#define ATTRIBUTE_MAY_ALIAS _GL_ATTRIBUTE_MAY_ALIAS
+
+
+#endif /* _GL_ATTRIBUTE_H */
diff --git a/src/grep/lib/basename-lgpl.c b/src/grep/lib/basename-lgpl.c
new file mode 100644
index 0000000..5dbd157
--- /dev/null
+++ b/src/grep/lib/basename-lgpl.c
@@ -0,0 +1,71 @@
+/* basename.c -- return the last element in a file name
+
+   Copyright (C) 1990, 1998-2001, 2003-2006, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "basename-lgpl.h"
+
+#include <stdbool.h>
+#include <string.h>
+
+#include "filename.h"
+
+char *
+last_component (char const *name)
+{
+  char const *base = name + FILE_SYSTEM_PREFIX_LEN (name);
+  char const *p;
+  bool last_was_slash = false;
+
+  while (ISSLASH (*base))
+    base++;
+
+  for (p = base; *p; p++)
+    {
+      if (ISSLASH (*p))
+        last_was_slash = true;
+      else if (last_was_slash)
+        {
+          base = p;
+          last_was_slash = false;
+        }
+    }
+
+  return (char *) base;
+}
+
+size_t
+base_len (char const *name)
+{
+  size_t len;
+  size_t prefix_len = FILE_SYSTEM_PREFIX_LEN (name);
+
+  for (len = strlen (name);  1 < len && ISSLASH (name[len - 1]);  len--)
+    continue;
+
+  if (DOUBLE_SLASH_IS_DISTINCT_ROOT && len == 1
+      && ISSLASH (name[0]) && ISSLASH (name[1]) && ! name[2])
+    return 2;
+
+  if (FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE && prefix_len
+      && len == prefix_len && ISSLASH (name[prefix_len]))
+    return prefix_len + 1;
+
+  return len;
+}
diff --git a/src/grep/lib/basename-lgpl.h b/src/grep/lib/basename-lgpl.h
new file mode 100644
index 0000000..d520c09
--- /dev/null
+++ b/src/grep/lib/basename-lgpl.h
@@ -0,0 +1,78 @@
+/* Extract the last component (base name) of a file name.
+
+   Copyright (C) 1998, 2001, 2003-2006, 2009-2021 Free Software Foundation,
+   Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _BASENAME_LGPL_H
+#define _BASENAME_LGPL_H
+
+#include <stddef.h>
+
+#ifndef DOUBLE_SLASH_IS_DISTINCT_ROOT
+# define DOUBLE_SLASH_IS_DISTINCT_ROOT 0
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Return the address of the last file name component of FILENAME.
+   If FILENAME has some trailing slash(es), they are considered to be
+   part of the last component.
+   If FILENAME has no relative file name components because it is a file
+   system root, return the empty string.
+   Examples:
+              FILENAME      RESULT
+              "foo.c"       "foo.c"
+              "foo/bar.c"   "bar.c"
+              "/foo/bar.c"  "bar.c"
+              "foo/bar/"    "bar/"
+              "foo/bar//"   "bar//"
+              "/"           ""
+              "//"          ""
+              ""            ""
+   The return value is a tail of the given FILENAME; do NOT free() it!  */
+
+/* This function was traditionally called 'basename', but we avoid this
+   function name because
+     * Various platforms have different functions in their libc.
+       In particular, the glibc basename(), defined in <string.h>, does
+       not consider trailing slashes to be part of the component:
+              FILENAME      RESULT
+              "foo/bar/"    ""
+              "foo/bar//"   ""
+     * The 'basename' command eliminates trailing slashes and for a root
+       produces a non-empty result:
+              FILENAME      RESULT
+              "foo/bar/"    "bar"
+              "foo/bar//"   "bar"
+              "/"           "/"
+              "//"          "/"
+ */
+extern char *last_component (char const *filename) _GL_ATTRIBUTE_PURE;
+
+/* Return the length of the basename FILENAME.
+   Typically FILENAME is the value returned by base_name or last_component.
+   Act like strlen (FILENAME), except omit all trailing slashes.  */
+extern size_t base_len (char const *filename) _GL_ATTRIBUTE_PURE;
+
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* _BASENAME_LGPL_H */
diff --git a/src/grep/lib/binary-io.c b/src/grep/lib/binary-io.c
new file mode 100644
index 0000000..adc0ae2
--- /dev/null
+++ b/src/grep/lib/binary-io.c
@@ -0,0 +1,39 @@
+/* Binary mode I/O.
+   Copyright 2017-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#define BINARY_IO_INLINE _GL_EXTERN_INLINE
+#include "binary-io.h"
+
+#if defined __DJGPP__ || defined __EMX__
+# include <unistd.h>
+
+int
+set_binary_mode (int fd, int mode)
+{
+  if (isatty (fd))
+    /* If FD refers to a console (not a pipe, not a regular file),
+       O_TEXT is the only reasonable mode, both on input and on output.
+       Silently ignore the request.  If we were to return -1 here,
+       all programs that use xset_binary_mode would fail when run
+       with console input or console output.  */
+    return O_TEXT;
+  else
+    return __gl_setmode (fd, mode);
+}
+
+#endif
diff --git a/src/grep/lib/binary-io.h b/src/grep/lib/binary-io.h
new file mode 100644
index 0000000..9b785c1
--- /dev/null
+++ b/src/grep/lib/binary-io.h
@@ -0,0 +1,80 @@
+/* Binary mode I/O.
+   Copyright (C) 2001, 2003, 2005, 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _BINARY_H
+#define _BINARY_H
+
+/* For systems that distinguish between text and binary I/O.
+   O_BINARY is guaranteed by the gnulib <fcntl.h>. */
+#include <fcntl.h>
+
+/* The MSVC7 <stdio.h> doesn't like to be included after '#define fileno ...',
+   so we include it here first.  */
+#include <stdio.h>
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef BINARY_IO_INLINE
+# define BINARY_IO_INLINE _GL_INLINE
+#endif
+
+#if O_BINARY
+# if defined __EMX__ || defined __DJGPP__ || defined __CYGWIN__
+#  include <io.h> /* declares setmode() */
+#  define __gl_setmode setmode
+# else
+#  ifdef KMK_GREP
+#   include <io.h> /* declares _setmode() */
+#  endif
+#  define __gl_setmode _setmode
+#  undef fileno
+#  define fileno _fileno
+# endif
+#else
+  /* On reasonable systems, binary I/O is the only choice.  */
+  /* Use a function rather than a macro, to avoid gcc warnings
+     "warning: statement with no effect".  */
+BINARY_IO_INLINE int
+__gl_setmode (int fd _GL_UNUSED, int mode _GL_UNUSED)
+{
+  return O_BINARY;
+}
+#endif
+
+/* Set FD's mode to MODE, which should be either O_TEXT or O_BINARY.
+   Return the old mode if successful, -1 (setting errno) on failure.
+   Ordinarily this function would be called 'setmode', since that is
+   its old name on MS-Windows, but it is called 'set_binary_mode' here
+   to avoid colliding with a BSD function of another name.  */
+
+#if defined __DJGPP__ || defined __EMX__
+extern int set_binary_mode (int fd, int mode);
+#else
+BINARY_IO_INLINE int
+set_binary_mode (int fd, int mode)
+{
+  return __gl_setmode (fd, mode);
+}
+#endif
+
+/* This macro is obsolescent.  */
+#define SET_BINARY(fd) ((void) set_binary_mode (fd, O_BINARY))
+
+_GL_INLINE_HEADER_END
+
+#endif /* _BINARY_H */
diff --git a/src/grep/lib/bitrotate.c b/src/grep/lib/bitrotate.c
new file mode 100644
index 0000000..e8987f2
--- /dev/null
+++ b/src/grep/lib/bitrotate.c
@@ -0,0 +1,21 @@
+/* Rotate bits in integers.
+
+   Copyright (C) 2012-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#define BITROTATE_INLINE _GL_EXTERN_INLINE
+#include "bitrotate.h"
diff --git a/src/grep/lib/bitrotate.h b/src/grep/lib/bitrotate.h
new file mode 100644
index 0000000..ceb734a
--- /dev/null
+++ b/src/grep/lib/bitrotate.h
@@ -0,0 +1,138 @@
+/* bitrotate.h - Rotate bits in integers
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Simon Josefsson <simon@josefsson.org>, 2008. */
+
+#ifndef _GL_BITROTATE_H
+#define _GL_BITROTATE_H
+
+#include <limits.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef BITROTATE_INLINE
+# define BITROTATE_INLINE _GL_INLINE
+#endif
+
+#ifdef UINT64_MAX
+/* Given an unsigned 64-bit argument X, return the value corresponding
+   to rotating the bits N steps to the left.  N must be between 1 and
+   63 inclusive. */
+BITROTATE_INLINE uint64_t
+rotl64 (uint64_t x, int n)
+{
+  return ((x << n) | (x >> (64 - n))) & UINT64_MAX;
+}
+
+/* Given an unsigned 64-bit argument X, return the value corresponding
+   to rotating the bits N steps to the right.  N must be between 1 to
+   63 inclusive.*/
+BITROTATE_INLINE uint64_t
+rotr64 (uint64_t x, int n)
+{
+  return ((x >> n) | (x << (64 - n))) & UINT64_MAX;
+}
+#endif
+
+/* Given an unsigned 32-bit argument X, return the value corresponding
+   to rotating the bits N steps to the left.  N must be between 1 and
+   31 inclusive. */
+BITROTATE_INLINE uint32_t
+rotl32 (uint32_t x, int n)
+{
+  return ((x << n) | (x >> (32 - n))) & UINT32_MAX;
+}
+
+/* Given an unsigned 32-bit argument X, return the value corresponding
+   to rotating the bits N steps to the right.  N must be between 1 to
+   31 inclusive.*/
+BITROTATE_INLINE uint32_t
+rotr32 (uint32_t x, int n)
+{
+  return ((x >> n) | (x << (32 - n))) & UINT32_MAX;
+}
+
+/* Given a size_t argument X, return the value corresponding
+   to rotating the bits N steps to the left.  N must be between 1 and
+   (CHAR_BIT * sizeof (size_t) - 1) inclusive.  */
+BITROTATE_INLINE size_t
+rotl_sz (size_t x, int n)
+{
+  return ((x << n) | (x >> ((CHAR_BIT * sizeof x) - n))) & SIZE_MAX;
+}
+
+/* Given a size_t argument X, return the value corresponding
+   to rotating the bits N steps to the right.  N must be between 1 to
+   (CHAR_BIT * sizeof (size_t) - 1) inclusive.  */
+BITROTATE_INLINE size_t
+rotr_sz (size_t x, int n)
+{
+  return ((x >> n) | (x << ((CHAR_BIT * sizeof x) - n))) & SIZE_MAX;
+}
+
+/* Given an unsigned 16-bit argument X, return the value corresponding
+   to rotating the bits N steps to the left.  N must be between 1 to
+   15 inclusive, but on most relevant targets N can also be 0 and 16
+   because 'int' is at least 32 bits and the arguments must widen
+   before shifting. */
+BITROTATE_INLINE uint16_t
+rotl16 (uint16_t x, int n)
+{
+  return (((unsigned int) x << n) | ((unsigned int) x >> (16 - n)))
+         & UINT16_MAX;
+}
+
+/* Given an unsigned 16-bit argument X, return the value corresponding
+   to rotating the bits N steps to the right.  N must be in 1 to 15
+   inclusive, but on most relevant targets N can also be 0 and 16
+   because 'int' is at least 32 bits and the arguments must widen
+   before shifting. */
+BITROTATE_INLINE uint16_t
+rotr16 (uint16_t x, int n)
+{
+  return (((unsigned int) x >> n) | ((unsigned int) x << (16 - n)))
+         & UINT16_MAX;
+}
+
+/* Given an unsigned 8-bit argument X, return the value corresponding
+   to rotating the bits N steps to the left.  N must be between 1 to 7
+   inclusive, but on most relevant targets N can also be 0 and 8
+   because 'int' is at least 32 bits and the arguments must widen
+   before shifting. */
+BITROTATE_INLINE uint8_t
+rotl8 (uint8_t x, int n)
+{
+  return (((unsigned int) x << n) | ((unsigned int) x >> (8 - n))) & UINT8_MAX;
+}
+
+/* Given an unsigned 8-bit argument X, return the value corresponding
+   to rotating the bits N steps to the right.  N must be in 1 to 7
+   inclusive, but on most relevant targets N can also be 0 and 8
+   because 'int' is at least 32 bits and the arguments must widen
+   before shifting. */
+BITROTATE_INLINE uint8_t
+rotr8 (uint8_t x, int n)
+{
+  return (((unsigned int) x >> n) | ((unsigned int) x << (8 - n))) & UINT8_MAX;
+}
+
+_GL_INLINE_HEADER_END
+
+#endif /* _GL_BITROTATE_H */
diff --git a/src/grep/lib/btowc.c b/src/grep/lib/btowc.c
new file mode 100644
index 0000000..b8239af
--- /dev/null
+++ b/src/grep/lib/btowc.c
@@ -0,0 +1,39 @@
+/* Convert unibyte character to wide character.
+   Copyright (C) 2008, 2010-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2008.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <wchar.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+wint_t
+btowc (int c)
+{
+  if (c != EOF)
+    {
+      char buf[1];
+      wchar_t wc;
+
+      buf[0] = c;
+      if (mbtowc (&wc, buf, 1) >= 0)
+        return wc;
+    }
+  return WEOF;
+}
diff --git a/src/grep/lib/c++defs.h b/src/grep/lib/c++defs.h
new file mode 100644
index 0000000..a47b61a
--- /dev/null
+++ b/src/grep/lib/c++defs.h
@@ -0,0 +1,331 @@
+/* C++ compatible function declaration macros.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as published
+   by the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GL_CXXDEFS_H
+#define _GL_CXXDEFS_H
+
+/* Begin/end the GNULIB_NAMESPACE namespace.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_BEGIN_NAMESPACE namespace GNULIB_NAMESPACE {
+# define _GL_END_NAMESPACE }
+#else
+# define _GL_BEGIN_NAMESPACE
+# define _GL_END_NAMESPACE
+#endif
+
+/* The three most frequent use cases of these macros are:
+
+   * For providing a substitute for a function that is missing on some
+     platforms, but is declared and works fine on the platforms on which
+     it exists:
+
+       #if @GNULIB_FOO@
+       # if !@HAVE_FOO@
+       _GL_FUNCDECL_SYS (foo, ...);
+       # endif
+       _GL_CXXALIAS_SYS (foo, ...);
+       _GL_CXXALIASWARN (foo);
+       #elif defined GNULIB_POSIXCHECK
+       ...
+       #endif
+
+   * For providing a replacement for a function that exists on all platforms,
+     but is broken/insufficient and needs to be replaced on some platforms:
+
+       #if @GNULIB_FOO@
+       # if @REPLACE_FOO@
+       #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+       #   undef foo
+       #   define foo rpl_foo
+       #  endif
+       _GL_FUNCDECL_RPL (foo, ...);
+       _GL_CXXALIAS_RPL (foo, ...);
+       # else
+       _GL_CXXALIAS_SYS (foo, ...);
+       # endif
+       _GL_CXXALIASWARN (foo);
+       #elif defined GNULIB_POSIXCHECK
+       ...
+       #endif
+
+   * For providing a replacement for a function that exists on some platforms
+     but is broken/insufficient and needs to be replaced on some of them and
+     is additionally either missing or undeclared on some other platforms:
+
+       #if @GNULIB_FOO@
+       # if @REPLACE_FOO@
+       #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+       #   undef foo
+       #   define foo rpl_foo
+       #  endif
+       _GL_FUNCDECL_RPL (foo, ...);
+       _GL_CXXALIAS_RPL (foo, ...);
+       # else
+       #  if !@HAVE_FOO@   or   if !@HAVE_DECL_FOO@
+       _GL_FUNCDECL_SYS (foo, ...);
+       #  endif
+       _GL_CXXALIAS_SYS (foo, ...);
+       # endif
+       _GL_CXXALIASWARN (foo);
+       #elif defined GNULIB_POSIXCHECK
+       ...
+       #endif
+*/
+
+/* _GL_EXTERN_C declaration;
+   performs the declaration with C linkage.  */
+#if defined __cplusplus
+# define _GL_EXTERN_C extern "C"
+#else
+# define _GL_EXTERN_C extern
+#endif
+
+/* _GL_FUNCDECL_RPL (func, rettype, parameters_and_attributes);
+   declares a replacement function, named rpl_func, with the given prototype,
+   consisting of return type, parameters, and attributes.
+   Example:
+     _GL_FUNCDECL_RPL (open, int, (const char *filename, int flags, ...)
+                                  _GL_ARG_NONNULL ((1)));
+ */
+#define _GL_FUNCDECL_RPL(func,rettype,parameters_and_attributes) \
+  _GL_FUNCDECL_RPL_1 (rpl_##func, rettype, parameters_and_attributes)
+#define _GL_FUNCDECL_RPL_1(rpl_func,rettype,parameters_and_attributes) \
+  _GL_EXTERN_C rettype rpl_func parameters_and_attributes
+
+/* _GL_FUNCDECL_SYS (func, rettype, parameters_and_attributes);
+   declares the system function, named func, with the given prototype,
+   consisting of return type, parameters, and attributes.
+   Example:
+     _GL_FUNCDECL_SYS (open, int, (const char *filename, int flags, ...)
+                                  _GL_ARG_NONNULL ((1)));
+ */
+#define _GL_FUNCDECL_SYS(func,rettype,parameters_and_attributes) \
+  _GL_EXTERN_C rettype func parameters_and_attributes
+
+/* _GL_CXXALIAS_RPL (func, rettype, parameters);
+   declares a C++ alias called GNULIB_NAMESPACE::func
+   that redirects to rpl_func, if GNULIB_NAMESPACE is defined.
+   Example:
+     _GL_CXXALIAS_RPL (open, int, (const char *filename, int flags, ...));
+
+   Wrapping rpl_func in an object with an inline conversion operator
+   avoids a reference to rpl_func unless GNULIB_NAMESPACE::func is
+   actually used in the program.  */
+#define _GL_CXXALIAS_RPL(func,rettype,parameters) \
+  _GL_CXXALIAS_RPL_1 (func, rpl_##func, rettype, parameters)
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
+    namespace GNULIB_NAMESPACE                                \
+    {                                                         \
+      static const struct _gl_ ## func ## _wrapper            \
+      {                                                       \
+        typedef rettype (*type) parameters;                   \
+                                                              \
+        inline operator type () const                         \
+        {                                                     \
+          return ::rpl_func;                                  \
+        }                                                     \
+      } func = {};                                            \
+    }                                                         \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#else
+# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIAS_MDA (func, rettype, parameters);
+   is to be used when func is a Microsoft deprecated alias, on native Windows.
+   It declares a C++ alias called GNULIB_NAMESPACE::func
+   that redirects to _func, if GNULIB_NAMESPACE is defined.
+   Example:
+     _GL_CXXALIAS_MDA (open, int, (const char *filename, int flags, ...));
+ */
+#define _GL_CXXALIAS_MDA(func,rettype,parameters) \
+  _GL_CXXALIAS_RPL_1 (func, _##func, rettype, parameters)
+
+/* _GL_CXXALIAS_RPL_CAST_1 (func, rpl_func, rettype, parameters);
+   is like  _GL_CXXALIAS_RPL_1 (func, rpl_func, rettype, parameters);
+   except that the C function rpl_func may have a slightly different
+   declaration.  A cast is used to silence the "invalid conversion" error
+   that would otherwise occur.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \
+    namespace GNULIB_NAMESPACE                                     \
+    {                                                              \
+      static const struct _gl_ ## func ## _wrapper                 \
+      {                                                            \
+        typedef rettype (*type) parameters;                        \
+                                                                   \
+        inline operator type () const                              \
+        {                                                          \
+          return reinterpret_cast<type>(::rpl_func);               \
+        }                                                          \
+      } func = {};                                                 \
+    }                                                              \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#else
+# define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIAS_MDA_CAST (func, rettype, parameters);
+   is like  _GL_CXXALIAS_MDA (func, rettype, parameters);
+   except that the C function func may have a slightly different declaration.
+   A cast is used to silence the "invalid conversion" error that would
+   otherwise occur.  */
+#define _GL_CXXALIAS_MDA_CAST(func,rettype,parameters) \
+  _GL_CXXALIAS_RPL_CAST_1 (func, _##func, rettype, parameters)
+
+/* _GL_CXXALIAS_SYS (func, rettype, parameters);
+   declares a C++ alias called GNULIB_NAMESPACE::func
+   that redirects to the system provided function func, if GNULIB_NAMESPACE
+   is defined.
+   Example:
+     _GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...));
+
+   Wrapping func in an object with an inline conversion operator
+   avoids a reference to func unless GNULIB_NAMESPACE::func is
+   actually used in the program.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIAS_SYS(func,rettype,parameters)            \
+    namespace GNULIB_NAMESPACE                                \
+    {                                                         \
+      static const struct _gl_ ## func ## _wrapper            \
+      {                                                       \
+        typedef rettype (*type) parameters;                   \
+                                                              \
+        inline operator type () const                         \
+        {                                                     \
+          return ::func;                                      \
+        }                                                     \
+      } func = {};                                            \
+    }                                                         \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#else
+# define _GL_CXXALIAS_SYS(func,rettype,parameters) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIAS_SYS_CAST (func, rettype, parameters);
+   is like  _GL_CXXALIAS_SYS (func, rettype, parameters);
+   except that the C function func may have a slightly different declaration.
+   A cast is used to silence the "invalid conversion" error that would
+   otherwise occur.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \
+    namespace GNULIB_NAMESPACE                          \
+    {                                                   \
+      static const struct _gl_ ## func ## _wrapper      \
+      {                                                 \
+        typedef rettype (*type) parameters;             \
+                                                        \
+        inline operator type () const                   \
+        {                                               \
+          return reinterpret_cast<type>(::func);        \
+        }                                               \
+      } func = {};                                      \
+    }                                                   \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#else
+# define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIAS_SYS_CAST2 (func, rettype, parameters, rettype2, parameters2);
+   is like  _GL_CXXALIAS_SYS (func, rettype, parameters);
+   except that the C function is picked among a set of overloaded functions,
+   namely the one with rettype2 and parameters2.  Two consecutive casts
+   are used to silence the "cannot find a match" and "invalid conversion"
+   errors that would otherwise occur.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+  /* The outer cast must be a reinterpret_cast.
+     The inner cast: When the function is defined as a set of overloaded
+     functions, it works as a static_cast<>, choosing the designated variant.
+     When the function is defined as a single variant, it works as a
+     reinterpret_cast<>. The parenthesized cast syntax works both ways.  */
+# define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \
+    namespace GNULIB_NAMESPACE                                                \
+    {                                                                         \
+      static const struct _gl_ ## func ## _wrapper                            \
+      {                                                                       \
+        typedef rettype (*type) parameters;                                   \
+                                                                              \
+        inline operator type () const                                         \
+        {                                                                     \
+          return reinterpret_cast<type>((rettype2 (*) parameters2)(::func));  \
+        }                                                                     \
+      } func = {};                                                            \
+    }                                                                         \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#else
+# define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIASWARN (func);
+   causes a warning to be emitted when ::func is used but not when
+   GNULIB_NAMESPACE::func is used.  func must be defined without overloaded
+   variants.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIASWARN(func) \
+   _GL_CXXALIASWARN_1 (func, GNULIB_NAMESPACE)
+# define _GL_CXXALIASWARN_1(func,namespace) \
+   _GL_CXXALIASWARN_2 (func, namespace)
+/* To work around GCC bug <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>,
+   we enable the warning only when not optimizing.  */
+# if !(defined __GNUC__ && !defined __clang__ && __OPTIMIZE__)
+#  define _GL_CXXALIASWARN_2(func,namespace) \
+    _GL_WARN_ON_USE (func, \
+                     "The symbol ::" #func " refers to the system function. " \
+                     "Use " #namespace "::" #func " instead.")
+# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
+#  define _GL_CXXALIASWARN_2(func,namespace) \
+     extern __typeof__ (func) func
+# else
+#  define _GL_CXXALIASWARN_2(func,namespace) \
+     _GL_EXTERN_C int _gl_cxxalias_dummy
+# endif
+#else
+# define _GL_CXXALIASWARN(func) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIASWARN1 (func, rettype, parameters_and_attributes);
+   causes a warning to be emitted when the given overloaded variant of ::func
+   is used but not when GNULIB_NAMESPACE::func is used.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \
+   _GL_CXXALIASWARN1_1 (func, rettype, parameters_and_attributes, \
+                        GNULIB_NAMESPACE)
+# define _GL_CXXALIASWARN1_1(func,rettype,parameters_and_attributes,namespace) \
+   _GL_CXXALIASWARN1_2 (func, rettype, parameters_and_attributes, namespace)
+/* To work around GCC bug <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>,
+   we enable the warning only when not optimizing.  */
+# if !(defined __GNUC__ && !defined __clang__ && __OPTIMIZE__)
+#  define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
+    _GL_WARN_ON_USE_CXX (func, rettype, rettype, parameters_and_attributes, \
+                         "The symbol ::" #func " refers to the system function. " \
+                         "Use " #namespace "::" #func " instead.")
+# else
+#  define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
+     _GL_EXTERN_C int _gl_cxxalias_dummy
+# endif
+#else
+# define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+#endif /* _GL_CXXDEFS_H */
diff --git a/src/grep/lib/c-ctype.c b/src/grep/lib/c-ctype.c
new file mode 100644
index 0000000..300f97c
--- /dev/null
+++ b/src/grep/lib/c-ctype.c
@@ -0,0 +1,21 @@
+/* Character handling in C locale.
+
+   Copyright (C) 2003-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#define C_CTYPE_INLINE _GL_EXTERN_INLINE
+#include "c-ctype.h"
diff --git a/src/grep/lib/c-ctype.h b/src/grep/lib/c-ctype.h
new file mode 100644
index 0000000..3a652ac
--- /dev/null
+++ b/src/grep/lib/c-ctype.h
@@ -0,0 +1,366 @@
+/* Character handling in C locale.
+
+   These functions work like the corresponding functions in <ctype.h>,
+   except that they have the C (POSIX) locale hardwired, whereas the
+   <ctype.h> functions' behaviour depends on the current locale set via
+   setlocale.
+
+   Copyright (C) 2000-2003, 2006, 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef C_CTYPE_H
+#define C_CTYPE_H
+
+#include <stdbool.h>
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef C_CTYPE_INLINE
+# define C_CTYPE_INLINE _GL_INLINE
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* The functions defined in this file assume the "C" locale and a character
+   set without diacritics (ASCII-US or EBCDIC-US or something like that).
+   Even if the "C" locale on a particular system is an extension of the ASCII
+   character set (like on BeOS, where it is UTF-8, or on AmigaOS, where it
+   is ISO-8859-1), the functions in this file recognize only the ASCII
+   characters.  */
+
+
+#if (' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
+    && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \
+    && (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \
+    && ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \
+    && ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \
+    && ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \
+    && ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \
+    && ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \
+    && ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \
+    && ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \
+    && ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \
+    && ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \
+    && ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \
+    && ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \
+    && ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \
+    && ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \
+    && ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \
+    && ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \
+    && ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \
+    && ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \
+    && ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \
+    && ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \
+    && ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126)
+/* The character set is ASCII or one of its variants or extensions, not EBCDIC.
+   Testing the value of '\n' and '\r' is not relevant.  */
+# define C_CTYPE_ASCII 1
+#elif ! (' ' == '\x40' && '0' == '\xf0'                     \
+         && 'A' == '\xc1' && 'J' == '\xd1' && 'S' == '\xe2' \
+         && 'a' == '\x81' && 'j' == '\x91' && 's' == '\xa2')
+# error "Only ASCII and EBCDIC are supported"
+#endif
+
+#if 'A' < 0
+# error "EBCDIC and char is signed -- not supported"
+#endif
+
+/* Cases for control characters.  */
+
+#define _C_CTYPE_CNTRL \
+   case '\a': case '\b': case '\f': case '\n': \
+   case '\r': case '\t': case '\v': \
+   _C_CTYPE_OTHER_CNTRL
+
+/* ASCII control characters other than those with \-letter escapes.  */
+
+#if C_CTYPE_ASCII
+# define _C_CTYPE_OTHER_CNTRL \
+    case '\x00': case '\x01': case '\x02': case '\x03': \
+    case '\x04': case '\x05': case '\x06': case '\x0e': \
+    case '\x0f': case '\x10': case '\x11': case '\x12': \
+    case '\x13': case '\x14': case '\x15': case '\x16': \
+    case '\x17': case '\x18': case '\x19': case '\x1a': \
+    case '\x1b': case '\x1c': case '\x1d': case '\x1e': \
+    case '\x1f': case '\x7f'
+#else
+   /* Use EBCDIC code page 1047's assignments for ASCII control chars;
+      assume all EBCDIC code pages agree about these assignments.  */
+# define _C_CTYPE_OTHER_CNTRL \
+    case '\x00': case '\x01': case '\x02': case '\x03': \
+    case '\x07': case '\x0e': case '\x0f': case '\x10': \
+    case '\x11': case '\x12': case '\x13': case '\x18': \
+    case '\x19': case '\x1c': case '\x1d': case '\x1e': \
+    case '\x1f': case '\x26': case '\x27': case '\x2d': \
+    case '\x2e': case '\x32': case '\x37': case '\x3c': \
+    case '\x3d': case '\x3f'
+#endif
+
+/* Cases for lowercase hex letters, and lowercase letters, all offset by N.  */
+
+#define _C_CTYPE_LOWER_A_THRU_F_N(N) \
+   case 'a' + (N): case 'b' + (N): case 'c' + (N): case 'd' + (N): \
+   case 'e' + (N): case 'f' + (N)
+#define _C_CTYPE_LOWER_N(N) \
+   _C_CTYPE_LOWER_A_THRU_F_N(N): \
+   case 'g' + (N): case 'h' + (N): case 'i' + (N): case 'j' + (N): \
+   case 'k' + (N): case 'l' + (N): case 'm' + (N): case 'n' + (N): \
+   case 'o' + (N): case 'p' + (N): case 'q' + (N): case 'r' + (N): \
+   case 's' + (N): case 't' + (N): case 'u' + (N): case 'v' + (N): \
+   case 'w' + (N): case 'x' + (N): case 'y' + (N): case 'z' + (N)
+
+/* Cases for hex letters, digits, lower, punct, and upper.  */
+
+#define _C_CTYPE_A_THRU_F \
+   _C_CTYPE_LOWER_A_THRU_F_N (0): \
+   _C_CTYPE_LOWER_A_THRU_F_N ('A' - 'a')
+#define _C_CTYPE_DIGIT                     \
+   case '0': case '1': case '2': case '3': \
+   case '4': case '5': case '6': case '7': \
+   case '8': case '9'
+#define _C_CTYPE_LOWER _C_CTYPE_LOWER_N (0)
+#define _C_CTYPE_PUNCT \
+   case '!': case '"': case '#': case '$':  \
+   case '%': case '&': case '\'': case '(': \
+   case ')': case '*': case '+': case ',':  \
+   case '-': case '.': case '/': case ':':  \
+   case ';': case '<': case '=': case '>':  \
+   case '?': case '@': case '[': case '\\': \
+   case ']': case '^': case '_': case '`':  \
+   case '{': case '|': case '}': case '~'
+#define _C_CTYPE_UPPER _C_CTYPE_LOWER_N ('A' - 'a')
+
+
+/* Function definitions.  */
+
+/* Unlike the functions in <ctype.h>, which require an argument in the range
+   of the 'unsigned char' type, the functions here operate on values that are
+   in the 'unsigned char' range or in the 'char' range.  In other words,
+   when you have a 'char' value, you need to cast it before using it as
+   argument to a <ctype.h> function:
+
+         const char *s = ...;
+         if (isalpha ((unsigned char) *s)) ...
+
+   but you don't need to cast it for the functions defined in this file:
+
+         const char *s = ...;
+         if (c_isalpha (*s)) ...
+ */
+
+C_CTYPE_INLINE bool
+c_isalnum (int c)
+{
+  switch (c)
+    {
+    _C_CTYPE_DIGIT:
+    _C_CTYPE_LOWER:
+    _C_CTYPE_UPPER:
+      return true;
+    default:
+      return false;
+    }
+}
+
+C_CTYPE_INLINE bool
+c_isalpha (int c)
+{
+  switch (c)
+    {
+    _C_CTYPE_LOWER:
+    _C_CTYPE_UPPER:
+      return true;
+    default:
+      return false;
+    }
+}
+
+/* The function isascii is not locale dependent.
+   Its use in EBCDIC is questionable. */
+C_CTYPE_INLINE bool
+c_isascii (int c)
+{
+  switch (c)
+    {
+    case ' ':
+    _C_CTYPE_CNTRL:
+    _C_CTYPE_DIGIT:
+    _C_CTYPE_LOWER:
+    _C_CTYPE_PUNCT:
+    _C_CTYPE_UPPER:
+      return true;
+    default:
+      return false;
+    }
+}
+
+C_CTYPE_INLINE bool
+c_isblank (int c)
+{
+  return c == ' ' || c == '\t';
+}
+
+C_CTYPE_INLINE bool
+c_iscntrl (int c)
+{
+  switch (c)
+    {
+    _C_CTYPE_CNTRL:
+      return true;
+    default:
+      return false;
+    }
+}
+
+C_CTYPE_INLINE bool
+c_isdigit (int c)
+{
+  switch (c)
+    {
+    _C_CTYPE_DIGIT:
+      return true;
+    default:
+      return false;
+    }
+}
+
+C_CTYPE_INLINE bool
+c_isgraph (int c)
+{
+  switch (c)
+    {
+    _C_CTYPE_DIGIT:
+    _C_CTYPE_LOWER:
+    _C_CTYPE_PUNCT:
+    _C_CTYPE_UPPER:
+      return true;
+    default:
+      return false;
+    }
+}
+
+C_CTYPE_INLINE bool
+c_islower (int c)
+{
+  switch (c)
+    {
+    _C_CTYPE_LOWER:
+      return true;
+    default:
+      return false;
+    }
+}
+
+C_CTYPE_INLINE bool
+c_isprint (int c)
+{
+  switch (c)
+    {
+    case ' ':
+    _C_CTYPE_DIGIT:
+    _C_CTYPE_LOWER:
+    _C_CTYPE_PUNCT:
+    _C_CTYPE_UPPER:
+      return true;
+    default:
+      return false;
+    }
+}
+
+C_CTYPE_INLINE bool
+c_ispunct (int c)
+{
+  switch (c)
+    {
+    _C_CTYPE_PUNCT:
+      return true;
+    default:
+      return false;
+    }
+}
+
+C_CTYPE_INLINE bool
+c_isspace (int c)
+{
+  switch (c)
+    {
+    case ' ': case '\t': case '\n': case '\v': case '\f': case '\r':
+      return true;
+    default:
+      return false;
+    }
+}
+
+C_CTYPE_INLINE bool
+c_isupper (int c)
+{
+  switch (c)
+    {
+    _C_CTYPE_UPPER:
+      return true;
+    default:
+      return false;
+    }
+}
+
+C_CTYPE_INLINE bool
+c_isxdigit (int c)
+{
+  switch (c)
+    {
+    _C_CTYPE_DIGIT:
+    _C_CTYPE_A_THRU_F:
+      return true;
+    default:
+      return false;
+    }
+}
+
+C_CTYPE_INLINE int
+c_tolower (int c)
+{
+  switch (c)
+    {
+    _C_CTYPE_UPPER:
+      return c - 'A' + 'a';
+    default:
+      return c;
+    }
+}
+
+C_CTYPE_INLINE int
+c_toupper (int c)
+{
+  switch (c)
+    {
+    _C_CTYPE_LOWER:
+      return c - 'a' + 'A';
+    default:
+      return c;
+    }
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+_GL_INLINE_HEADER_END
+
+#endif /* C_CTYPE_H */
diff --git a/src/grep/lib/c-stack.c b/src/grep/lib/c-stack.c
new file mode 100644
index 0000000..1965bdd
--- /dev/null
+++ b/src/grep/lib/c-stack.c
@@ -0,0 +1,214 @@
+/* Stack overflow handling.
+
+   Copyright (C) 2002, 2004, 2006, 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+/* NOTES:
+
+   A program that uses alloca, dynamic arrays, or large local
+   variables may extend the stack by more than a page at a time.  If
+   so, when the stack overflows the operating system may not detect
+   the overflow until the program uses the array, and this module may
+   incorrectly report a program error instead of a stack overflow.
+
+   To avoid this problem, allocate only small objects on the stack; a
+   program should be OK if it limits single allocations to a page or
+   less.  Allocate larger arrays in static storage, or on the heap
+   (e.g., with malloc).  Yes, this is a pain, but we don't know of any
+   better solution that is portable.
+
+   No attempt has been made to deal with multithreaded applications.  */
+
+#include <config.h>
+
+#include "c-stack.h"
+
+#include <errno.h>
+#include <inttypes.h>
+#include <signal.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#if DEBUG
+# include <stdio.h>
+#endif
+
+#include <sigsegv.h>
+
+#include "exitfail.h"
+#include "getprogname.h"
+#include "idx.h"
+#include "ignore-value.h"
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+#if HAVE_STACK_OVERFLOW_RECOVERY
+
+/* Storage for the alternate signal stack.
+   64 KiB is not too large for Gnulib-using apps, and is large enough
+   for all known platforms.  Smaller sizes may run into trouble.
+   For example, libsigsegv 2.6 through 2.8 have a bug where some
+   architectures use more than the Linux default of an 8 KiB alternate
+   stack when deciding if a fault was caused by stack overflow.  */
+static max_align_t alternate_signal_stack[(64 * 1024
+                                           + sizeof (max_align_t) - 1)
+                                          / sizeof (max_align_t)];
+
+/* The user-specified action to take when a SEGV-related program error
+   or stack overflow occurs.  */
+static _GL_ASYNC_SAFE void (* volatile segv_action) (int);
+
+/* Translated messages for program errors and stack overflow.  Do not
+   translate them in the signal handler, since gettext is not
+   async-signal-safe.  */
+static char const * volatile program_error_message;
+static char const * volatile stack_overflow_message;
+
+/* Output an error message, then exit with status EXIT_FAILURE if it
+   appears to have been a stack overflow, or with a core dump
+   otherwise.  This function is async-signal-safe.  */
+
+static char const * volatile progname;
+
+static _GL_ASYNC_SAFE _Noreturn void
+die (int signo)
+{
+  segv_action (signo);
+  char const *message = signo ? program_error_message : stack_overflow_message;
+
+  /* If the message is short, write it all at once to avoid
+     interleaving with other messages.  Avoid writev as it is not
+     documented to be async-signal-safe.  */
+  size_t prognamelen = strlen (progname);
+  size_t messagelen = strlen (message);
+  static char const separator[] = {':', ' '};
+  char buf[sizeof alternate_signal_stack / 16 + sizeof separator];
+  idx_t buflen;
+  if (prognamelen + messagelen < sizeof buf - sizeof separator)
+    {
+      char *p = mempcpy (buf, progname, prognamelen);
+      p = mempcpy (p, separator, sizeof separator);
+      p = mempcpy (p, message, messagelen);
+      *p++ = '\n';
+      buflen = p - buf;
+    }
+  else
+    {
+      ignore_value (write (STDERR_FILENO, progname, prognamelen));
+      ignore_value (write (STDERR_FILENO, separator, sizeof separator));
+      ignore_value (write (STDERR_FILENO, message, messagelen));
+      buf[0] = '\n';
+      buflen = 1;
+    }
+  ignore_value (write (STDERR_FILENO, buf, buflen));
+
+  if (! signo)
+    _exit (exit_failure);
+  raise (signo);
+  abort ();
+}
+
+static _GL_ASYNC_SAFE void
+null_action (int signo _GL_UNUSED)
+{
+}
+
+/* Pacify GCC 9.3.1, which otherwise would complain about segv_handler.  */
+# if 4 < __GNUC__ + (6 <= __GNUC_MINOR__)
+#  pragma GCC diagnostic ignored "-Wsuggest-attribute=pure"
+# endif
+
+/* Nonzero if general segv handler could not be installed.  */
+static volatile int segv_handler_missing;
+
+/* Handle a segmentation violation and exit if it cannot be stack
+   overflow.  This function is async-signal-safe.  */
+
+static _GL_ASYNC_SAFE int
+segv_handler (void *address _GL_UNUSED, int serious)
+{
+# if DEBUG
+  {
+    char buf[1024];
+    int saved_errno = errno;
+    ignore_value (write (STDERR_FILENO, buf,
+                         sprintf (buf, "segv_handler serious=%d\n", serious)));
+    errno = saved_errno;
+  }
+# endif
+
+  /* If this fault is not serious, return 0 to let the stack overflow
+     handler take a shot at it.  */
+  if (!serious)
+    return 0;
+  die (SIGSEGV);
+}
+
+/* Handle a segmentation violation that is likely to be a stack
+   overflow and exit.  This function is async-signal-safe.  */
+
+static _GL_ASYNC_SAFE _Noreturn void
+overflow_handler (int emergency, stackoverflow_context_t context _GL_UNUSED)
+{
+# if DEBUG
+  {
+    char buf[1024];
+    ignore_value (write (STDERR_FILENO, buf,
+                         sprintf (buf, ("overflow_handler emergency=%d"
+                                        " segv_handler_missing=%d\n"),
+                                  emergency, segv_handler_missing)));
+  }
+# endif
+
+  die ((!emergency || segv_handler_missing) ? 0 : SIGSEGV);
+}
+
+int
+c_stack_action (_GL_ASYNC_SAFE void (*action) (int))
+{
+  segv_action = action ? action : null_action;
+  program_error_message = _("program error");
+  stack_overflow_message = _("stack overflow");
+  progname = getprogname ();
+
+  /* Always install the overflow handler.  */
+  if (stackoverflow_install_handler (overflow_handler,
+                                     alternate_signal_stack,
+                                     sizeof alternate_signal_stack))
+    {
+      errno = ENOTSUP;
+      return -1;
+    }
+  /* Try installing a general handler; if it fails, then treat all
+     segv as stack overflow.  */
+  segv_handler_missing = sigsegv_install_handler (segv_handler);
+  return 0;
+}
+
+#else /* !HAVE_STACK_OVERFLOW_RECOVERY */
+
+int
+c_stack_action (_GL_ASYNC_SAFE void (*action) (int)  _GL_UNUSED)
+{
+  errno = ENOTSUP;
+  return -1;
+}
+
+#endif
diff --git a/src/grep/lib/c-stack.h b/src/grep/lib/c-stack.h
new file mode 100644
index 0000000..a9a8b13
--- /dev/null
+++ b/src/grep/lib/c-stack.h
@@ -0,0 +1,49 @@
+/* Stack overflow handling.
+
+   Copyright (C) 2002, 2004, 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+
+/* Set up ACTION so that it is invoked on C stack overflow and on other,
+   stack-unrelated, segmentation violation.
+   Return -1 (setting errno) if this cannot be done.
+
+   When a stack overflow or segmentation violation occurs:
+   1) ACTION is called.  It is passed an argument equal to
+        - 0, for a stack overflow,
+        - SIGSEGV, for a segmentation violation that does not appear related
+          to stack overflow.
+      On many platforms the two cases are hard to distinguish; when in doubt,
+      zero is passed.
+   2) If ACTION returns, a message is written to standard error, and the
+      program is terminated: in the case of stack overflow, with exit code
+      exit_failure (see "exitfail.h"), otherwise through a signal SIGSEGV.
+
+   A null ACTION acts like an action that does nothing.
+
+   Restrictions:
+   - ACTION must be async-signal-safe.
+   - ACTION together with its callees must not require more than 64 KiB of
+     stack space.
+   - ACTION must not create and then invoke nested functions
+     <https://gcc.gnu.org/onlinedocs/gcc/Nested-Functions.html>, because
+     this implementation does not guarantee an executable stack.
+   - ACTION should not call longjmp, because this implementation does not
+     guarantee that it is safe to return to the original stack.
+
+   This function may install a handler for the SIGSEGV signal or for the SIGBUS
+   signal or exercise other system dependent exception handling APIs.  */
+
+extern int c_stack_action (_GL_ASYNC_SAFE void (* /*action*/) (int));
diff --git a/src/grep/lib/c-strcase.h b/src/grep/lib/c-strcase.h
new file mode 100644
index 0000000..82f99bb
--- /dev/null
+++ b/src/grep/lib/c-strcase.h
@@ -0,0 +1,56 @@
+/* Case-insensitive string comparison functions in C locale.
+   Copyright (C) 1995-1996, 2001, 2003, 2005, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef C_STRCASE_H
+#define C_STRCASE_H
+
+#include <stddef.h>
+
+
+/* The functions defined in this file assume the "C" locale and a character
+   set without diacritics (ASCII-US or EBCDIC-US or something like that).
+   Even if the "C" locale on a particular system is an extension of the ASCII
+   character set (like on BeOS, where it is UTF-8, or on AmigaOS, where it
+   is ISO-8859-1), the functions in this file recognize only the ASCII
+   characters.  More precisely, one of the string arguments must be an ASCII
+   string; the other one can also contain non-ASCII characters (but then
+   the comparison result will be nonzero).  */
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Compare strings S1 and S2, ignoring case, returning less than, equal to or
+   greater than zero if S1 is lexicographically less than, equal to or greater
+   than S2.  */
+extern int c_strcasecmp (const char *s1, const char *s2) _GL_ATTRIBUTE_PURE;
+
+/* Compare no more than N characters of strings S1 and S2, ignoring case,
+   returning less than, equal to or greater than zero if S1 is
+   lexicographically less than, equal to or greater than S2.  */
+extern int c_strncasecmp (const char *s1, const char *s2, size_t n)
+  _GL_ATTRIBUTE_PURE;
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* C_STRCASE_H */
diff --git a/src/grep/lib/c-strcasecmp.c b/src/grep/lib/c-strcasecmp.c
new file mode 100644
index 0000000..3c22455
--- /dev/null
+++ b/src/grep/lib/c-strcasecmp.c
@@ -0,0 +1,56 @@
+/* c-strcasecmp.c -- case insensitive string comparator in C locale
+   Copyright (C) 1998-1999, 2005-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "c-strcase.h"
+
+#include <limits.h>
+
+#include "c-ctype.h"
+
+int
+c_strcasecmp (const char *s1, const char *s2)
+{
+  register const unsigned char *p1 = (const unsigned char *) s1;
+  register const unsigned char *p2 = (const unsigned char *) s2;
+  unsigned char c1, c2;
+
+  if (p1 == p2)
+    return 0;
+
+  do
+    {
+      c1 = c_tolower (*p1);
+      c2 = c_tolower (*p2);
+
+      if (c1 == '\0')
+        break;
+
+      ++p1;
+      ++p2;
+    }
+  while (c1 == c2);
+
+  if (UCHAR_MAX <= INT_MAX)
+    return c1 - c2;
+  else
+    /* On machines where 'char' and 'int' are types of the same size, the
+       difference of two 'unsigned char' values - including the sign bit -
+       doesn't fit in an 'int'.  */
+    return _GL_CMP (c1, c2);
+}
diff --git a/src/grep/lib/c-strcaseeq.h b/src/grep/lib/c-strcaseeq.h
new file mode 100644
index 0000000..66b9cf3
--- /dev/null
+++ b/src/grep/lib/c-strcaseeq.h
@@ -0,0 +1,181 @@
+/* Optimized case-insensitive string comparison in C locale.
+   Copyright (C) 2001-2002, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>.  */
+
+#include "c-strcase.h"
+#include "c-ctype.h"
+
+/* STRCASEEQ allows to optimize string comparison with a small literal string.
+     STRCASEEQ (s, "UTF-8", 'U','T','F','-','8',0,0,0,0)
+   is semantically equivalent to
+     c_strcasecmp (s, "UTF-8") == 0
+   just faster.  */
+
+/* Help GCC to generate good code for string comparisons with
+   immediate strings. */
+#if (defined __GNUC__ || defined __clang__) && defined __OPTIMIZE__
+
+/* Case insensitive comparison of ASCII characters.  */
+# if C_CTYPE_ASCII
+#  define CASEEQ(other,upper) \
+     (c_isupper (upper) ? ((other) & ~0x20) == (upper) : (other) == (upper))
+# else
+#  define CASEEQ(other,upper) \
+     (c_toupper (other) == (upper))
+# endif
+
+static inline int
+strcaseeq9 (const char *s1, const char *s2)
+{
+  return c_strcasecmp (s1 + 9, s2 + 9) == 0;
+}
+
+static inline int
+strcaseeq8 (const char *s1, const char *s2, char s28)
+{
+  if (CASEEQ (s1[8], s28))
+    {
+      if (s28 == 0)
+        return 1;
+      else
+        return strcaseeq9 (s1, s2);
+    }
+  else
+    return 0;
+}
+
+static inline int
+strcaseeq7 (const char *s1, const char *s2, char s27, char s28)
+{
+  if (CASEEQ (s1[7], s27))
+    {
+      if (s27 == 0)
+        return 1;
+      else
+        return strcaseeq8 (s1, s2, s28);
+    }
+  else
+    return 0;
+}
+
+static inline int
+strcaseeq6 (const char *s1, const char *s2, char s26, char s27, char s28)
+{
+  if (CASEEQ (s1[6], s26))
+    {
+      if (s26 == 0)
+        return 1;
+      else
+        return strcaseeq7 (s1, s2, s27, s28);
+    }
+  else
+    return 0;
+}
+
+static inline int
+strcaseeq5 (const char *s1, const char *s2, char s25, char s26, char s27, char s28)
+{
+  if (CASEEQ (s1[5], s25))
+    {
+      if (s25 == 0)
+        return 1;
+      else
+        return strcaseeq6 (s1, s2, s26, s27, s28);
+    }
+  else
+    return 0;
+}
+
+static inline int
+strcaseeq4 (const char *s1, const char *s2, char s24, char s25, char s26, char s27, char s28)
+{
+  if (CASEEQ (s1[4], s24))
+    {
+      if (s24 == 0)
+        return 1;
+      else
+        return strcaseeq5 (s1, s2, s25, s26, s27, s28);
+    }
+  else
+    return 0;
+}
+
+static inline int
+strcaseeq3 (const char *s1, const char *s2, char s23, char s24, char s25, char s26, char s27, char s28)
+{
+  if (CASEEQ (s1[3], s23))
+    {
+      if (s23 == 0)
+        return 1;
+      else
+        return strcaseeq4 (s1, s2, s24, s25, s26, s27, s28);
+    }
+  else
+    return 0;
+}
+
+static inline int
+strcaseeq2 (const char *s1, const char *s2, char s22, char s23, char s24, char s25, char s26, char s27, char s28)
+{
+  if (CASEEQ (s1[2], s22))
+    {
+      if (s22 == 0)
+        return 1;
+      else
+        return strcaseeq3 (s1, s2, s23, s24, s25, s26, s27, s28);
+    }
+  else
+    return 0;
+}
+
+static inline int
+strcaseeq1 (const char *s1, const char *s2, char s21, char s22, char s23, char s24, char s25, char s26, char s27, char s28)
+{
+  if (CASEEQ (s1[1], s21))
+    {
+      if (s21 == 0)
+        return 1;
+      else
+        return strcaseeq2 (s1, s2, s22, s23, s24, s25, s26, s27, s28);
+    }
+  else
+    return 0;
+}
+
+static inline int
+strcaseeq0 (const char *s1, const char *s2, char s20, char s21, char s22, char s23, char s24, char s25, char s26, char s27, char s28)
+{
+  if (CASEEQ (s1[0], s20))
+    {
+      if (s20 == 0)
+        return 1;
+      else
+        return strcaseeq1 (s1, s2, s21, s22, s23, s24, s25, s26, s27, s28);
+    }
+  else
+    return 0;
+}
+
+#define STRCASEEQ(s1,s2,s20,s21,s22,s23,s24,s25,s26,s27,s28) \
+  strcaseeq0 (s1, s2, s20, s21, s22, s23, s24, s25, s26, s27, s28)
+
+#else
+
+#define STRCASEEQ(s1,s2,s20,s21,s22,s23,s24,s25,s26,s27,s28) \
+  (c_strcasecmp (s1, s2) == 0)
+
+#endif
diff --git a/src/grep/lib/c-strncasecmp.c b/src/grep/lib/c-strncasecmp.c
new file mode 100644
index 0000000..f3ca786
--- /dev/null
+++ b/src/grep/lib/c-strncasecmp.c
@@ -0,0 +1,56 @@
+/* c-strncasecmp.c -- case insensitive string comparator in C locale
+   Copyright (C) 1998-1999, 2005-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "c-strcase.h"
+
+#include <limits.h>
+
+#include "c-ctype.h"
+
+int
+c_strncasecmp (const char *s1, const char *s2, size_t n)
+{
+  register const unsigned char *p1 = (const unsigned char *) s1;
+  register const unsigned char *p2 = (const unsigned char *) s2;
+  unsigned char c1, c2;
+
+  if (p1 == p2 || n == 0)
+    return 0;
+
+  do
+    {
+      c1 = c_tolower (*p1);
+      c2 = c_tolower (*p2);
+
+      if (--n == 0 || c1 == '\0')
+        break;
+
+      ++p1;
+      ++p2;
+    }
+  while (c1 == c2);
+
+  if (UCHAR_MAX <= INT_MAX)
+    return c1 - c2;
+  else
+    /* On machines where 'char' and 'int' are types of the same size, the
+       difference of two 'unsigned char' values - including the sign bit -
+       doesn't fit in an 'int'.  */
+    return _GL_CMP (c1, c2);
+}
diff --git a/src/grep/lib/calloc.c b/src/grep/lib/calloc.c
new file mode 100644
index 0000000..25064e9
--- /dev/null
+++ b/src/grep/lib/calloc.c
@@ -0,0 +1,55 @@
+/* calloc() function that is glibc compatible.
+   This wrapper function is required at least on Tru64 UNIX 5.1 and mingw.
+   Copyright (C) 2004-2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering and Bruno Haible */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include <errno.h>
+
+#include "xalloc-oversized.h"
+
+/* Call the system's calloc below.  */
+#undef calloc
+
+/* Allocate and zero-fill an NxS-byte block of memory from the heap,
+   even if N or S is zero.  */
+
+void *
+rpl_calloc (size_t n, size_t s)
+{
+  if (n == 0 || s == 0)
+    n = s = 1;
+
+  if (xalloc_oversized (n, s))
+    {
+      errno = ENOMEM;
+      return NULL;
+    }
+
+  void *result = calloc (n, s);
+
+#if !HAVE_MALLOC_POSIX
+  if (result == NULL)
+    errno = ENOMEM;
+#endif
+
+  return result;
+}
diff --git a/src/grep/lib/cdefs.h b/src/grep/lib/cdefs.h
new file mode 100644
index 0000000..b883b25
--- /dev/null
+++ b/src/grep/lib/cdefs.h
@@ -0,0 +1,614 @@
+/* Copyright (C) 1992-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef	_SYS_CDEFS_H
+#define	_SYS_CDEFS_H	1
+
+/* We are almost always included from features.h. */
+#ifndef _FEATURES_H
+# include <features.h>
+#endif
+
+/* The GNU libc does not support any K&R compilers or the traditional mode
+   of ISO C compilers anymore.  Check for some of the combinations not
+   supported anymore.  */
+#if defined __GNUC__ && !defined __STDC__
+# error "You need a ISO C conforming compiler to use the glibc headers"
+#endif
+
+/* Some user header file might have defined this before.  */
+#undef	__P
+#undef	__PMT
+
+/* Compilers that lack __has_attribute may object to
+       #if defined __has_attribute && __has_attribute (...)
+   even though they do not need to evaluate the right-hand side of the &&.
+   Similarly for __has_builtin, etc.  */
+#if (defined __has_attribute \
+     && (!defined __clang_minor__ \
+         || 3 < __clang_major__ + (5 <= __clang_minor__)))
+# define __glibc_has_attribute(attr) __has_attribute (attr)
+#else
+# define __glibc_has_attribute(attr) 0
+#endif
+#ifdef __has_builtin
+# define __glibc_has_builtin(name) __has_builtin (name)
+#else
+# define __glibc_has_builtin(name) 0
+#endif
+#ifdef __has_extension
+# define __glibc_has_extension(ext) __has_extension (ext)
+#else
+# define __glibc_has_extension(ext) 0
+#endif
+
+#if defined __GNUC__ || defined __clang__
+
+/* All functions, except those with callbacks or those that
+   synchronize memory, are leaf functions.  */
+# if __GNUC_PREREQ (4, 6) && !defined _LIBC
+#  define __LEAF , __leaf__
+#  define __LEAF_ATTR __attribute__ ((__leaf__))
+# else
+#  define __LEAF
+#  define __LEAF_ATTR
+# endif
+
+/* GCC can always grok prototypes.  For C++ programs we add throw()
+   to help it optimize the function calls.  But this only works with
+   gcc 2.8.x and egcs.  For gcc 3.4 and up we even mark C functions
+   as non-throwing using a function attribute since programs can use
+   the -fexceptions options for C code as well.  */
+# if !defined __cplusplus \
+     && (__GNUC_PREREQ (3, 4) || __glibc_has_attribute (__nothrow__))
+#  define __THROW	__attribute__ ((__nothrow__ __LEAF))
+#  define __THROWNL	__attribute__ ((__nothrow__))
+#  define __NTH(fct)	__attribute__ ((__nothrow__ __LEAF)) fct
+#  define __NTHNL(fct)  __attribute__ ((__nothrow__)) fct
+# else
+#  if defined __cplusplus && (__GNUC_PREREQ (2,8) || __clang_major >= 4)
+#   if __cplusplus >= 201103L
+#    define __THROW	noexcept (true)
+#   else
+#    define __THROW	throw ()
+#   endif
+#   define __THROWNL	__THROW
+#   define __NTH(fct)	__LEAF_ATTR fct __THROW
+#   define __NTHNL(fct) fct __THROW
+#  else
+#   define __THROW
+#   define __THROWNL
+#   define __NTH(fct)	fct
+#   define __NTHNL(fct) fct
+#  endif
+# endif
+
+#else	/* Not GCC or clang.  */
+
+# if (defined __cplusplus						\
+      || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L))
+#  define __inline	inline
+# else
+#  define __inline		/* No inline functions.  */
+# endif
+
+# define __THROW
+# define __THROWNL
+# define __NTH(fct)	fct
+
+#endif	/* GCC || clang.  */
+
+/* These two macros are not used in glibc anymore.  They are kept here
+   only because some other projects expect the macros to be defined.  */
+#define __P(args)	args
+#define __PMT(args)	args
+
+/* For these things, GCC behaves the ANSI way normally,
+   and the non-ANSI way under -traditional.  */
+
+#define __CONCAT(x,y)	x ## y
+#define __STRING(x)	#x
+
+/* This is not a typedef so `const __ptr_t' does the right thing.  */
+#define __ptr_t void *
+
+
+/* C++ needs to know that types and declarations are C, not C++.  */
+#ifdef	__cplusplus
+# define __BEGIN_DECLS	extern "C" {
+# define __END_DECLS	}
+#else
+# define __BEGIN_DECLS
+# define __END_DECLS
+#endif
+
+
+/* Fortify support.  */
+#define __bos(ptr) __builtin_object_size (ptr, __USE_FORTIFY_LEVEL > 1)
+#define __bos0(ptr) __builtin_object_size (ptr, 0)
+
+/* Use __builtin_dynamic_object_size at _FORTIFY_SOURCE=3 when available.  */
+#if __USE_FORTIFY_LEVEL == 3 && __glibc_clang_prereq (9, 0)
+# define __glibc_objsize0(__o) __builtin_dynamic_object_size (__o, 0)
+# define __glibc_objsize(__o) __builtin_dynamic_object_size (__o, 1)
+#else
+# define __glibc_objsize0(__o) __bos0 (__o)
+# define __glibc_objsize(__o) __bos (__o)
+#endif
+
+#if __GNUC_PREREQ (4,3)
+# define __warnattr(msg) __attribute__((__warning__ (msg)))
+# define __errordecl(name, msg) \
+  extern void name (void) __attribute__((__error__ (msg)))
+#else
+# define __warnattr(msg)
+# define __errordecl(name, msg) extern void name (void)
+#endif
+
+/* Support for flexible arrays.
+   Headers that should use flexible arrays only if they're "real"
+   (e.g. only if they won't affect sizeof()) should test
+   #if __glibc_c99_flexarr_available.  */
+#if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L && !defined __HP_cc
+# define __flexarr	[]
+# define __glibc_c99_flexarr_available 1
+#elif __GNUC_PREREQ (2,97) || defined __clang__
+/* GCC 2.97 and clang support C99 flexible array members as an extension,
+   even when in C89 mode or compiling C++ (any version).  */
+# define __flexarr	[]
+# define __glibc_c99_flexarr_available 1
+#elif defined __GNUC__
+/* Pre-2.97 GCC did not support C99 flexible arrays but did have
+   an equivalent extension with slightly different notation.  */
+# define __flexarr	[0]
+# define __glibc_c99_flexarr_available 1
+#else
+/* Some other non-C99 compiler.  Approximate with [1].  */
+# define __flexarr	[1]
+# define __glibc_c99_flexarr_available 0
+#endif
+
+
+/* __asm__ ("xyz") is used throughout the headers to rename functions
+   at the assembly language level.  This is wrapped by the __REDIRECT
+   macro, in order to support compilers that can do this some other
+   way.  When compilers don't support asm-names at all, we have to do
+   preprocessor tricks instead (which don't have exactly the right
+   semantics, but it's the best we can do).
+
+   Example:
+   int __REDIRECT(setpgrp, (__pid_t pid, __pid_t pgrp), setpgid); */
+
+#if (defined __GNUC__ && __GNUC__ >= 2) || (__clang_major__ >= 4)
+
+# define __REDIRECT(name, proto, alias) name proto __asm__ (__ASMNAME (#alias))
+# ifdef __cplusplus
+#  define __REDIRECT_NTH(name, proto, alias) \
+     name proto __THROW __asm__ (__ASMNAME (#alias))
+#  define __REDIRECT_NTHNL(name, proto, alias) \
+     name proto __THROWNL __asm__ (__ASMNAME (#alias))
+# else
+#  define __REDIRECT_NTH(name, proto, alias) \
+     name proto __asm__ (__ASMNAME (#alias)) __THROW
+#  define __REDIRECT_NTHNL(name, proto, alias) \
+     name proto __asm__ (__ASMNAME (#alias)) __THROWNL
+# endif
+# define __ASMNAME(cname)  __ASMNAME2 (__USER_LABEL_PREFIX__, cname)
+# define __ASMNAME2(prefix, cname) __STRING (prefix) cname
+
+/*
+#elif __SOME_OTHER_COMPILER__
+
+# define __REDIRECT(name, proto, alias) name proto; \
+	_Pragma("let " #name " = " #alias)
+*/
+#endif
+
+/* GCC and clang have various useful declarations that can be made with
+   the '__attribute__' syntax.  All of the ways we use this do fine if
+   they are omitted for compilers that don't understand it.  */
+#if !(defined __GNUC__ || defined __clang__)
+# define __attribute__(xyz)	/* Ignore */
+#endif
+
+/* At some point during the gcc 2.96 development the `malloc' attribute
+   for functions was introduced.  We don't want to use it unconditionally
+   (although this would be possible) since it generates warnings.  */
+#if __GNUC_PREREQ (2,96) || __glibc_has_attribute (__malloc__)
+# define __attribute_malloc__ __attribute__ ((__malloc__))
+#else
+# define __attribute_malloc__ /* Ignore */
+#endif
+
+/* Tell the compiler which arguments to an allocation function
+   indicate the size of the allocation.  */
+#if __GNUC_PREREQ (4, 3)
+# define __attribute_alloc_size__(params) \
+  __attribute__ ((__alloc_size__ params))
+#else
+# define __attribute_alloc_size__(params) /* Ignore.  */
+#endif
+
+/* At some point during the gcc 2.96 development the `pure' attribute
+   for functions was introduced.  We don't want to use it unconditionally
+   (although this would be possible) since it generates warnings.  */
+#if __GNUC_PREREQ (2,96) || __glibc_has_attribute (__pure__)
+# define __attribute_pure__ __attribute__ ((__pure__))
+#else
+# define __attribute_pure__ /* Ignore */
+#endif
+
+/* This declaration tells the compiler that the value is constant.  */
+#if __GNUC_PREREQ (2,5) || __glibc_has_attribute (__const__)
+# define __attribute_const__ __attribute__ ((__const__))
+#else
+# define __attribute_const__ /* Ignore */
+#endif
+
+#if __GNUC_PREREQ (2,7) || __glibc_has_attribute (__unused__)
+# define __attribute_maybe_unused__ __attribute__ ((__unused__))
+/* Once the next version of the C standard comes out, we can
+   do something like the following here:
+   #elif defined __STDC_VERSION__ && 202???L <= __STDC_VERSION__
+   # define __attribute_maybe_unused__ [[__maybe_unused__]]   */
+#else
+# define __attribute_maybe_unused__ /* Ignore */
+#endif
+
+/* At some point during the gcc 3.1 development the `used' attribute
+   for functions was introduced.  We don't want to use it unconditionally
+   (although this would be possible) since it generates warnings.  */
+#if __GNUC_PREREQ (3,1) || __glibc_has_attribute (__used__)
+# define __attribute_used__ __attribute__ ((__used__))
+# define __attribute_noinline__ __attribute__ ((__noinline__))
+#else
+# define __attribute_used__ __attribute__ ((__unused__))
+# define __attribute_noinline__ /* Ignore */
+#endif
+
+/* Since version 3.2, gcc allows marking deprecated functions.  */
+#if __GNUC_PREREQ (3,2) || __glibc_has_attribute (__deprecated__)
+# define __attribute_deprecated__ __attribute__ ((__deprecated__))
+#else
+# define __attribute_deprecated__ /* Ignore */
+#endif
+
+/* Since version 4.5, gcc also allows one to specify the message printed
+   when a deprecated function is used.  clang claims to be gcc 4.2, but
+   may also support this feature.  */
+#if __GNUC_PREREQ (4,5) \
+    || __glibc_has_extension (__attribute_deprecated_with_message__)
+# define __attribute_deprecated_msg__(msg) \
+	 __attribute__ ((__deprecated__ (msg)))
+#else
+# define __attribute_deprecated_msg__(msg) __attribute_deprecated__
+#endif
+
+/* At some point during the gcc 2.8 development the `format_arg' attribute
+   for functions was introduced.  We don't want to use it unconditionally
+   (although this would be possible) since it generates warnings.
+   If several `format_arg' attributes are given for the same function, in
+   gcc-3.0 and older, all but the last one are ignored.  In newer gccs,
+   all designated arguments are considered.  */
+#if __GNUC_PREREQ (2,8) || __glibc_has_attribute (__format_arg__)
+# define __attribute_format_arg__(x) __attribute__ ((__format_arg__ (x)))
+#else
+# define __attribute_format_arg__(x) /* Ignore */
+#endif
+
+/* At some point during the gcc 2.97 development the `strfmon' format
+   attribute for functions was introduced.  We don't want to use it
+   unconditionally (although this would be possible) since it
+   generates warnings.  */
+#if __GNUC_PREREQ (2,97) || __glibc_has_attribute (__format__)
+# define __attribute_format_strfmon__(a,b) \
+  __attribute__ ((__format__ (__strfmon__, a, b)))
+#else
+# define __attribute_format_strfmon__(a,b) /* Ignore */
+#endif
+
+/* The nonnull function attribute marks pointer parameters that
+   must not be NULL.  This has the name __nonnull in glibc,
+   and __attribute_nonnull__ in files shared with Gnulib to avoid
+   collision with a different __nonnull in DragonFlyBSD 5.9.  */
+#ifndef __attribute_nonnull__
+# if __GNUC_PREREQ (3,3) || __glibc_has_attribute (__nonnull__)
+#  define __attribute_nonnull__(params) __attribute__ ((__nonnull__ params))
+# else
+#  define __attribute_nonnull__(params)
+# endif
+#endif
+#ifndef __nonnull
+# define __nonnull(params) __attribute_nonnull__ (params)
+#endif
+
+/* If fortification mode, we warn about unused results of certain
+   function calls which can lead to problems.  */
+#if __GNUC_PREREQ (3,4) || __glibc_has_attribute (__warn_unused_result__)
+# define __attribute_warn_unused_result__ \
+   __attribute__ ((__warn_unused_result__))
+# if defined __USE_FORTIFY_LEVEL && __USE_FORTIFY_LEVEL > 0
+#  define __wur __attribute_warn_unused_result__
+# endif
+#else
+# define __attribute_warn_unused_result__ /* empty */
+#endif
+#ifndef __wur
+# define __wur /* Ignore */
+#endif
+
+/* Forces a function to be always inlined.  */
+#if __GNUC_PREREQ (3,2) || __glibc_has_attribute (__always_inline__)
+/* The Linux kernel defines __always_inline in stddef.h (283d7573), and
+   it conflicts with this definition.  Therefore undefine it first to
+   allow either header to be included first.  */
+# undef __always_inline
+# define __always_inline __inline __attribute__ ((__always_inline__))
+#else
+# undef __always_inline
+# define __always_inline __inline
+#endif
+
+/* Associate error messages with the source location of the call site rather
+   than with the source location inside the function.  */
+#if __GNUC_PREREQ (4,3) || __glibc_has_attribute (__artificial__)
+# define __attribute_artificial__ __attribute__ ((__artificial__))
+#else
+# define __attribute_artificial__ /* Ignore */
+#endif
+
+/* GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
+   inline semantics, unless -fgnu89-inline is used.  Using __GNUC_STDC_INLINE__
+   or __GNUC_GNU_INLINE is not a good enough check for gcc because gcc versions
+   older than 4.3 may define these macros and still not guarantee GNU inlining
+   semantics.
+
+   clang++ identifies itself as gcc-4.2, but has support for GNU inlining
+   semantics, that can be checked for by using the __GNUC_STDC_INLINE_ and
+   __GNUC_GNU_INLINE__ macro definitions.  */
+#if (!defined __cplusplus || __GNUC_PREREQ (4,3) \
+     || (defined __clang__ && (defined __GNUC_STDC_INLINE__ \
+			       || defined __GNUC_GNU_INLINE__)))
+# if defined __GNUC_STDC_INLINE__ || defined __cplusplus
+#  define __extern_inline extern __inline __attribute__ ((__gnu_inline__))
+#  define __extern_always_inline \
+  extern __always_inline __attribute__ ((__gnu_inline__))
+# else
+#  define __extern_inline extern __inline
+#  define __extern_always_inline extern __always_inline
+# endif
+#endif
+
+#ifdef __extern_always_inline
+# define __fortify_function __extern_always_inline __attribute_artificial__
+#endif
+
+/* GCC 4.3 and above allow passing all anonymous arguments of an
+   __extern_always_inline function to some other vararg function.  */
+#if __GNUC_PREREQ (4,3)
+# define __va_arg_pack() __builtin_va_arg_pack ()
+# define __va_arg_pack_len() __builtin_va_arg_pack_len ()
+#endif
+
+/* It is possible to compile containing GCC extensions even if GCC is
+   run in pedantic mode if the uses are carefully marked using the
+   `__extension__' keyword.  But this is not generally available before
+   version 2.8.  */
+#if !(__GNUC_PREREQ (2,8) || defined __clang__)
+# define __extension__		/* Ignore */
+#endif
+
+/* __restrict is known in EGCS 1.2 and above, and in clang.
+   It works also in C++ mode (outside of arrays), but only when spelled
+   as '__restrict', not 'restrict'.  */
+#if !(__GNUC_PREREQ (2,92) || __clang_major__ >= 3)
+# if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
+#  define __restrict	restrict
+# else
+#  define __restrict	/* Ignore */
+# endif
+#endif
+
+/* ISO C99 also allows to declare arrays as non-overlapping.  The syntax is
+     array_name[restrict]
+   GCC 3.1 and clang support this.
+   This syntax is not usable in C++ mode.  */
+#if (__GNUC_PREREQ (3,1) || __clang_major__ >= 3) && !defined __cplusplus
+# define __restrict_arr	__restrict
+#else
+# ifdef __GNUC__
+#  define __restrict_arr	/* Not supported in old GCC.  */
+# else
+#  if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
+#   define __restrict_arr	restrict
+#  else
+/* Some other non-C99 compiler.  */
+#   define __restrict_arr	/* Not supported.  */
+#  endif
+# endif
+#endif
+
+#if (__GNUC__ >= 3) || __glibc_has_builtin (__builtin_expect)
+# define __glibc_unlikely(cond)	__builtin_expect ((cond), 0)
+# define __glibc_likely(cond)	__builtin_expect ((cond), 1)
+#else
+# define __glibc_unlikely(cond)	(cond)
+# define __glibc_likely(cond)	(cond)
+#endif
+
+#if (!defined _Noreturn \
+     && (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) < 201112 \
+     &&  !(__GNUC_PREREQ (4,7) \
+           || (3 < __clang_major__ + (5 <= __clang_minor__))))
+# if __GNUC_PREREQ (2,8)
+#  define _Noreturn __attribute__ ((__noreturn__))
+# else
+#  define _Noreturn
+# endif
+#endif
+
+#if __GNUC_PREREQ (8, 0)
+/* Describes a char array whose address can safely be passed as the first
+   argument to strncpy and strncat, as the char array is not necessarily
+   a NUL-terminated string.  */
+# define __attribute_nonstring__ __attribute__ ((__nonstring__))
+#else
+# define __attribute_nonstring__
+#endif
+
+/* Undefine (also defined in libc-symbols.h).  */
+#undef __attribute_copy__
+#if __GNUC_PREREQ (9, 0)
+/* Copies attributes from the declaration or type referenced by
+   the argument.  */
+# define __attribute_copy__(arg) __attribute__ ((__copy__ (arg)))
+#else
+# define __attribute_copy__(arg)
+#endif
+
+#if (!defined _Static_assert && !defined __cplusplus \
+     && (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) < 201112 \
+     && (!(__GNUC_PREREQ (4, 6) || __clang_major__ >= 4) \
+         || defined __STRICT_ANSI__))
+# define _Static_assert(expr, diagnostic) \
+    extern int (*__Static_assert_function (void)) \
+      [!!sizeof (struct { int __error_if_negative: (expr) ? 2 : -1; })]
+#endif
+
+/* Gnulib avoids including these, as they don't work on non-glibc or
+   older glibc platforms.  */
+#ifndef __GNULIB_CDEFS
+# include <bits/wordsize.h>
+# include <bits/long-double.h>
+#endif
+
+#if __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1
+# ifdef __REDIRECT
+
+/* Alias name defined automatically.  */
+#  define __LDBL_REDIR(name, proto) ... unused__ldbl_redir
+#  define __LDBL_REDIR_DECL(name) \
+  extern __typeof (name) name __asm (__ASMNAME ("__" #name "ieee128"));
+
+/* Alias name defined automatically, with leading underscores.  */
+#  define __LDBL_REDIR2_DECL(name) \
+  extern __typeof (__##name) __##name \
+    __asm (__ASMNAME ("__" #name "ieee128"));
+
+/* Alias name defined manually.  */
+#  define __LDBL_REDIR1(name, proto, alias) ... unused__ldbl_redir1
+#  define __LDBL_REDIR1_DECL(name, alias) \
+  extern __typeof (name) name __asm (__ASMNAME (#alias));
+
+#  define __LDBL_REDIR1_NTH(name, proto, alias) \
+  __REDIRECT_NTH (name, proto, alias)
+#  define __REDIRECT_NTH_LDBL(name, proto, alias) \
+  __LDBL_REDIR1_NTH (name, proto, __##alias##ieee128)
+
+/* Unused.  */
+#  define __REDIRECT_LDBL(name, proto, alias) ... unused__redirect_ldbl
+#  define __LDBL_REDIR_NTH(name, proto) ... unused__ldbl_redir_nth
+
+# else
+_Static_assert (0, "IEEE 128-bits long double requires redirection on this platform");
+# endif
+#elif defined __LONG_DOUBLE_MATH_OPTIONAL && defined __NO_LONG_DOUBLE_MATH
+# define __LDBL_COMPAT 1
+# ifdef __REDIRECT
+#  define __LDBL_REDIR1(name, proto, alias) __REDIRECT (name, proto, alias)
+#  define __LDBL_REDIR(name, proto) \
+  __LDBL_REDIR1 (name, proto, __nldbl_##name)
+#  define __LDBL_REDIR1_NTH(name, proto, alias) __REDIRECT_NTH (name, proto, alias)
+#  define __LDBL_REDIR_NTH(name, proto) \
+  __LDBL_REDIR1_NTH (name, proto, __nldbl_##name)
+#  define __LDBL_REDIR2_DECL(name) \
+  extern __typeof (__##name) __##name __asm (__ASMNAME ("__nldbl___" #name));
+#  define __LDBL_REDIR1_DECL(name, alias) \
+  extern __typeof (name) name __asm (__ASMNAME (#alias));
+#  define __LDBL_REDIR_DECL(name) \
+  extern __typeof (name) name __asm (__ASMNAME ("__nldbl_" #name));
+#  define __REDIRECT_LDBL(name, proto, alias) \
+  __LDBL_REDIR1 (name, proto, __nldbl_##alias)
+#  define __REDIRECT_NTH_LDBL(name, proto, alias) \
+  __LDBL_REDIR1_NTH (name, proto, __nldbl_##alias)
+# endif
+#endif
+#if (!defined __LDBL_COMPAT && __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 0) \
+    || !defined __REDIRECT
+# define __LDBL_REDIR1(name, proto, alias) name proto
+# define __LDBL_REDIR(name, proto) name proto
+# define __LDBL_REDIR1_NTH(name, proto, alias) name proto __THROW
+# define __LDBL_REDIR_NTH(name, proto) name proto __THROW
+# define __LDBL_REDIR2_DECL(name)
+# define __LDBL_REDIR_DECL(name)
+# ifdef __REDIRECT
+#  define __REDIRECT_LDBL(name, proto, alias) __REDIRECT (name, proto, alias)
+#  define __REDIRECT_NTH_LDBL(name, proto, alias) \
+  __REDIRECT_NTH (name, proto, alias)
+# endif
+#endif
+
+/* __glibc_macro_warning (MESSAGE) issues warning MESSAGE.  This is
+   intended for use in preprocessor macros.
+
+   Note: MESSAGE must be a _single_ string; concatenation of string
+   literals is not supported.  */
+#if __GNUC_PREREQ (4,8) || __glibc_clang_prereq (3,5)
+# define __glibc_macro_warning1(message) _Pragma (#message)
+# define __glibc_macro_warning(message) \
+  __glibc_macro_warning1 (GCC warning message)
+#else
+# define __glibc_macro_warning(msg)
+#endif
+
+/* Generic selection (ISO C11) is a C-only feature, available in GCC
+   since version 4.9.  Previous versions do not provide generic
+   selection, even though they might set __STDC_VERSION__ to 201112L,
+   when in -std=c11 mode.  Thus, we must check for !defined __GNUC__
+   when testing __STDC_VERSION__ for generic selection support.
+   On the other hand, Clang also defines __GNUC__, so a clang-specific
+   check is required to enable the use of generic selection.  */
+#if !defined __cplusplus \
+    && (__GNUC_PREREQ (4, 9) \
+	|| __glibc_has_extension (c_generic_selections) \
+	|| (!defined __GNUC__ && defined __STDC_VERSION__ \
+	    && __STDC_VERSION__ >= 201112L))
+# define __HAVE_GENERIC_SELECTION 1
+#else
+# define __HAVE_GENERIC_SELECTION 0
+#endif
+
+#if __GNUC_PREREQ (10, 0)
+/* Designates a 1-based positional argument ref-index of pointer type
+   that can be used to access size-index elements of the pointed-to
+   array according to access mode, or at least one element when
+   size-index is not provided:
+     access (access-mode, <ref-index> [, <size-index>])  */
+#define __attr_access(x) __attribute__ ((__access__ x))
+#else
+#  define __attr_access(x)
+#endif
+
+/* Specify that a function such as setjmp or vfork may return
+   twice.  */
+#if __GNUC_PREREQ (4, 1)
+# define __attribute_returns_twice__ __attribute__ ((__returns_twice__))
+#else
+# define __attribute_returns_twice__ /* Ignore.  */
+#endif
+
+#endif	 /* sys/cdefs.h */
diff --git a/src/grep/lib/chdir-long.c b/src/grep/lib/chdir-long.c
new file mode 100644
index 0000000..0d693b0
--- /dev/null
+++ b/src/grep/lib/chdir-long.c
@@ -0,0 +1,264 @@
+/* provide a chdir function that tries not to fail due to ENAMETOOLONG
+   Copyright (C) 2004-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering */
+
+#include <config.h>
+
+#include "chdir-long.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "assure.h"
+
+#ifndef PATH_MAX
+# error "compile this file only if your system defines PATH_MAX"
+#endif
+
+/* The results of openat() in this file are not leaked to any
+   single-threaded code that could use stdio.
+   FIXME - if the kernel ever adds support for multi-thread safety for
+   avoiding standard fds, then we should use openat_safer.  */
+
+struct cd_buf
+{
+  int fd;
+};
+
+static void
+cdb_init (struct cd_buf *cdb)
+{
+  cdb->fd = AT_FDCWD;
+}
+
+static int
+cdb_fchdir (struct cd_buf const *cdb)
+{
+  return fchdir (cdb->fd);
+}
+
+static void
+cdb_free (struct cd_buf const *cdb)
+{
+  if (0 <= cdb->fd)
+    {
+      bool close_fail = close (cdb->fd);
+      assure (! close_fail);
+    }
+}
+
+/* Given a file descriptor of an open directory (or AT_FDCWD), CDB->fd,
+   try to open the CDB->fd-relative directory, DIR.  If the open succeeds,
+   update CDB->fd with the resulting descriptor, close the incoming file
+   descriptor, and return zero.  Upon failure, return -1 and set errno.  */
+static int
+cdb_advance_fd (struct cd_buf *cdb, char const *dir)
+{
+  int new_fd = openat (cdb->fd, dir,
+                       O_SEARCH | O_DIRECTORY | O_NOCTTY | O_NONBLOCK);
+  if (new_fd < 0)
+    return -1;
+
+  cdb_free (cdb);
+  cdb->fd = new_fd;
+
+  return 0;
+}
+
+/* Return a pointer to the first non-slash in S.  */
+static char * _GL_ATTRIBUTE_PURE
+find_non_slash (char const *s)
+{
+  size_t n_slash = strspn (s, "/");
+  return (char *) s + n_slash;
+}
+
+/* This is a function much like chdir, but without the PATH_MAX limitation
+   on the length of the directory name.  A significant difference is that
+   it must be able to modify (albeit only temporarily) the directory
+   name.  It handles an arbitrarily long directory name by operating
+   on manageable portions of the name.  On systems without the openat
+   syscall, this means changing the working directory to more and more
+   "distant" points along the long directory name and then restoring
+   the working directory.  If any of those attempts to save or restore
+   the working directory fails, this function exits nonzero.
+
+   Note that this function may still fail with errno == ENAMETOOLONG, but
+   only if the specified directory name contains a component that is long
+   enough to provoke such a failure all by itself (e.g. if the component
+   has length PATH_MAX or greater on systems that define PATH_MAX).  */
+
+int
+chdir_long (char *dir)
+{
+  int e = chdir (dir);
+  if (e == 0 || errno != ENAMETOOLONG)
+    return e;
+
+  {
+    size_t len = strlen (dir);
+    char *dir_end = dir + len;
+    struct cd_buf cdb;
+    size_t n_leading_slash;
+
+    cdb_init (&cdb);
+
+    /* If DIR is the empty string, then the chdir above
+       must have failed and set errno to ENOENT.  */
+    assure (0 < len);
+    assure (PATH_MAX <= len);
+
+    /* Count leading slashes.  */
+    n_leading_slash = strspn (dir, "/");
+
+    /* Handle any leading slashes as well as any name that matches
+       the regular expression, m!^//hostname[/]*! .  Handling this
+       prefix separately usually results in a single additional
+       cdb_advance_fd call, but it's worthwhile, since it makes the
+       code in the following loop cleaner.  */
+    if (n_leading_slash == 2)
+      {
+        int err;
+        /* Find next slash.
+           We already know that dir[2] is neither a slash nor '\0'.  */
+        char *slash = memchr (dir + 3, '/', dir_end - (dir + 3));
+        if (slash == NULL)
+          {
+            errno = ENAMETOOLONG;
+            return -1;
+          }
+        *slash = '\0';
+        err = cdb_advance_fd (&cdb, dir);
+        *slash = '/';
+        if (err != 0)
+          goto Fail;
+        dir = find_non_slash (slash + 1);
+      }
+    else if (n_leading_slash)
+      {
+        if (cdb_advance_fd (&cdb, "/") != 0)
+          goto Fail;
+        dir += n_leading_slash;
+      }
+
+    assure (*dir != '/');
+    assure (dir <= dir_end);
+
+    while (PATH_MAX <= dir_end - dir)
+      {
+        int err;
+        /* Find a slash that is PATH_MAX or fewer bytes away from dir.
+           I.e. see if there is a slash that will give us a name of
+           length PATH_MAX-1 or less.  */
+        char *slash = memrchr (dir, '/', PATH_MAX);
+        if (slash == NULL)
+          {
+            errno = ENAMETOOLONG;
+            return -1;
+          }
+
+        *slash = '\0';
+        assure (slash - dir < PATH_MAX);
+        err = cdb_advance_fd (&cdb, dir);
+        *slash = '/';
+        if (err != 0)
+          goto Fail;
+
+        dir = find_non_slash (slash + 1);
+      }
+
+    if (dir < dir_end)
+      {
+        if (cdb_advance_fd (&cdb, dir) != 0)
+          goto Fail;
+      }
+
+    if (cdb_fchdir (&cdb) != 0)
+      goto Fail;
+
+    cdb_free (&cdb);
+    return 0;
+
+   Fail:
+    {
+      int saved_errno = errno;
+      cdb_free (&cdb);
+      errno = saved_errno;
+      return -1;
+    }
+  }
+}
+
+#if TEST_CHDIR
+
+# include "closeout.h"
+# include "error.h"
+
+int
+main (int argc, char *argv[])
+{
+  char *line = NULL;
+  size_t n = 0;
+  int len;
+
+  atexit (close_stdout);
+
+  len = getline (&line, &n, stdin);
+  if (len < 0)
+    {
+      int saved_errno = errno;
+      if (feof (stdin))
+        exit (0);
+
+      error (EXIT_FAILURE, saved_errno,
+             "reading standard input");
+    }
+  else if (len == 0)
+    exit (0);
+
+  if (line[len-1] == '\n')
+    line[len-1] = '\0';
+
+  if (chdir_long (line) != 0)
+    error (EXIT_FAILURE, errno,
+           "chdir_long failed: %s", line);
+
+  if (argc <= 1)
+    {
+      /* Using 'pwd' here makes sense only if it is a robust implementation,
+         like the one in coreutils after the 2004-04-19 changes.  */
+      char const *cmd = "pwd";
+      execlp (cmd, (char *) NULL);
+      error (EXIT_FAILURE, errno, "%s", cmd);
+    }
+
+  fclose (stdin);
+  fclose (stderr);
+
+  exit (EXIT_SUCCESS);
+}
+#endif
+
+/*
+Local Variables:
+compile-command: "gcc -DTEST_CHDIR=1 -g -O -W -Wall chdir-long.c libcoreutils.a"
+End:
+*/
diff --git a/src/grep/lib/chdir-long.h b/src/grep/lib/chdir-long.h
new file mode 100644
index 0000000..17d9aa5
--- /dev/null
+++ b/src/grep/lib/chdir-long.h
@@ -0,0 +1,30 @@
+/* provide a chdir function that tries not to fail due to ENAMETOOLONG
+   Copyright (C) 2004-2005, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering.  */
+
+#include <unistd.h>
+#include <limits.h>
+
+#include "pathmax.h"
+
+/* On systems without PATH_MAX, presume that chdir accepts
+   arbitrarily long directory names.  */
+#ifndef PATH_MAX
+# define chdir_long(Dir) chdir (Dir)
+#else
+int chdir_long (char *dir);
+#endif
diff --git a/src/grep/lib/cloexec.c b/src/grep/lib/cloexec.c
new file mode 100644
index 0000000..7defa93
--- /dev/null
+++ b/src/grep/lib/cloexec.c
@@ -0,0 +1,83 @@
+/* cloexec.c - set or clear the close-on-exec descriptor flag
+
+   Copyright (C) 1991, 2004-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* The code is taken from glibc/manual/llio.texi  */
+
+#include <config.h>
+
+#include "cloexec.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+/* Set the 'FD_CLOEXEC' flag of DESC if VALUE is true,
+   or clear the flag if VALUE is false.
+   Return 0 on success, or -1 on error with 'errno' set.
+
+   Note that on MingW, this function does NOT protect DESC from being
+   inherited into spawned children.  Instead, either use dup_cloexec
+   followed by closing the original DESC, or use interfaces such as
+   open or pipe2 that accept flags like O_CLOEXEC to create DESC
+   non-inheritable in the first place.  */
+
+int
+set_cloexec_flag (int desc, bool value)
+{
+#ifdef F_SETFD
+
+  int flags = fcntl (desc, F_GETFD, 0);
+
+  if (0 <= flags)
+    {
+      int newflags = (value ? flags | FD_CLOEXEC : flags & ~FD_CLOEXEC);
+
+      if (flags == newflags
+          || fcntl (desc, F_SETFD, newflags) != -1)
+        return 0;
+    }
+
+  return -1;
+
+#else /* !F_SETFD */
+
+  /* Use dup2 to reject invalid file descriptors; the cloexec flag
+     will be unaffected.  */
+  if (desc < 0)
+    {
+      errno = EBADF;
+      return -1;
+    }
+  if (dup2 (desc, desc) < 0)
+    /* errno is EBADF here.  */
+    return -1;
+
+  /* There is nothing we can do on this kind of platform.  Punt.  */
+  return 0;
+#endif /* !F_SETFD */
+}
+
+
+/* Duplicates a file handle FD, while marking the copy to be closed
+   prior to exec or spawn.  Returns -1 and sets errno if FD could not
+   be duplicated.  */
+
+int
+dup_cloexec (int fd)
+{
+  return fcntl (fd, F_DUPFD_CLOEXEC, 0);
+}
diff --git a/src/grep/lib/cloexec.h b/src/grep/lib/cloexec.h
new file mode 100644
index 0000000..97a3659
--- /dev/null
+++ b/src/grep/lib/cloexec.h
@@ -0,0 +1,36 @@
+/* cloexec.c - set or clear the close-on-exec descriptor flag
+
+   Copyright (C) 2004, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <stdbool.h>
+
+/* Set the 'FD_CLOEXEC' flag of DESC if VALUE is true,
+   or clear the flag if VALUE is false.
+   Return 0 on success, or -1 on error with 'errno' set.
+
+   Note that on MingW, this function does NOT protect DESC from being
+   inherited into spawned children.  Instead, either use dup_cloexec
+   followed by closing the original DESC, or use interfaces such as
+   open or pipe2 that accept flags like O_CLOEXEC to create DESC
+   non-inheritable in the first place.  */
+
+int set_cloexec_flag (int desc, bool value);
+
+/* Duplicates a file handle FD, while marking the copy to be closed
+   prior to exec or spawn.  Returns -1 and sets errno if FD could not
+   be duplicated.  */
+
+int dup_cloexec (int fd);
diff --git a/src/grep/lib/close-stream.c b/src/grep/lib/close-stream.c
new file mode 100644
index 0000000..86f6d6e
--- /dev/null
+++ b/src/grep/lib/close-stream.c
@@ -0,0 +1,78 @@
+/* Close a stream, with nicer error checking than fclose's.
+
+   Copyright (C) 1998-2002, 2004, 2006-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "close-stream.h"
+
+#include <errno.h>
+#include <stdbool.h>
+
+#include "fpending.h"
+
+#if USE_UNLOCKED_IO
+# include "unlocked-io.h"
+#endif
+
+/* Close STREAM.  Return 0 if successful, EOF (setting errno)
+   otherwise.  A failure might set errno to 0 if the error number
+   cannot be determined.
+
+   A failure with errno set to EPIPE may or may not indicate an error
+   situation worth signaling to the user.  See the documentation of the
+   close_stdout_set_ignore_EPIPE function for details.
+
+   If a program writes *anything* to STREAM, that program should close
+   STREAM and make sure that it succeeds before exiting.  Otherwise,
+   suppose that you go to the extreme of checking the return status
+   of every function that does an explicit write to STREAM.  The last
+   printf can succeed in writing to the internal stream buffer, and yet
+   the fclose(STREAM) could still fail (due e.g., to a disk full error)
+   when it tries to write out that buffered data.  Thus, you would be
+   left with an incomplete output file and the offending program would
+   exit successfully.  Even calling fflush is not always sufficient,
+   since some file systems (NFS and CODA) buffer written/flushed data
+   until an actual close call.
+
+   Besides, it's wasteful to check the return value from every call
+   that writes to STREAM -- just let the internal stream state record
+   the failure.  That's what the ferror test is checking below.  */
+
+int
+close_stream (FILE *stream)
+{
+  const bool some_pending = (__fpending (stream) != 0);
+  const bool prev_fail = (ferror (stream) != 0);
+  const bool fclose_fail = (fclose (stream) != 0);
+
+  /* Return an error indication if there was a previous failure or if
+     fclose failed, with one exception: ignore an fclose failure if
+     there was no previous error, no data remains to be flushed, and
+     fclose failed with EBADF.  That can happen when a program like cp
+     is invoked like this 'cp a b >&-' (i.e., with standard output
+     closed) and doesn't generate any output (hence no previous error
+     and nothing to be flushed).  */
+
+  if (prev_fail || (fclose_fail && (some_pending || errno != EBADF)))
+    {
+      if (! fclose_fail)
+        errno = 0;
+      return EOF;
+    }
+
+  return 0;
+}
diff --git a/src/grep/lib/close-stream.h b/src/grep/lib/close-stream.h
new file mode 100644
index 0000000..8a58a48
--- /dev/null
+++ b/src/grep/lib/close-stream.h
@@ -0,0 +1,20 @@
+/* Close a stream, with nicer error checking than fclose's.
+
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3 of the License,
+   or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+
+int close_stream (FILE *stream);
diff --git a/src/grep/lib/close.c b/src/grep/lib/close.c
new file mode 100644
index 0000000..5b9ab6c
--- /dev/null
+++ b/src/grep/lib/close.c
@@ -0,0 +1,75 @@
+/* close replacement.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+#include <errno.h>
+
+#include "fd-hook.h"
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+# include "msvc-inval.h"
+#endif
+
+#undef close
+
+#if defined _WIN32 && !defined __CYGWIN__
+# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+static int
+close_nothrow (int fd)
+{
+  int result;
+
+  TRY_MSVC_INVAL
+    {
+      result = _close (fd);
+    }
+  CATCH_MSVC_INVAL
+    {
+      result = -1;
+      errno = EBADF;
+    }
+  DONE_MSVC_INVAL;
+
+  return result;
+}
+# else
+#  define close_nothrow _close
+# endif
+#else
+# define close_nothrow close
+#endif
+
+/* Override close() to call into other gnulib modules.  */
+
+int
+rpl_close (int fd)
+{
+#if WINDOWS_SOCKETS
+  int retval = execute_all_close_hooks (close_nothrow, fd);
+#else
+  int retval = close_nothrow (fd);
+#endif
+
+#if REPLACE_FCHDIR
+  if (retval >= 0)
+    _gl_unregister_fd (fd);
+#endif
+
+  return retval;
+}
diff --git a/src/grep/lib/closedir.c b/src/grep/lib/closedir.c
new file mode 100644
index 0000000..80a500b
--- /dev/null
+++ b/src/grep/lib/closedir.c
@@ -0,0 +1,71 @@
+/* Stop reading the entries of a directory.
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <dirent.h>
+
+#if REPLACE_FCHDIR
+# include <unistd.h>
+#endif
+
+#if HAVE_CLOSEDIR
+
+/* Override closedir(), to keep track of the open file descriptors.
+   Needed because there is a function dirfd().  */
+
+#else
+
+# include <stdlib.h>
+
+# include "dirent-private.h"
+
+#endif
+
+int
+closedir (DIR *dirp)
+{
+# if REPLACE_FCHDIR || REPLACE_DIRFD
+  int fd = dirfd (dirp);
+# endif
+  int retval;
+
+#if HAVE_CLOSEDIR
+# undef closedir
+
+  retval = closedir (dirp);
+
+# ifdef __KLIBC__
+  if (!retval)
+    _gl_unregister_dirp_fd (fd);
+# endif
+#else
+
+  if (dirp->current != INVALID_HANDLE_VALUE)
+    FindClose (dirp->current);
+  free (dirp);
+
+  retval = 0;
+
+#endif
+
+#if REPLACE_FCHDIR
+  if (retval >= 0)
+    _gl_unregister_fd (fd);
+#endif
+  return retval;
+}
diff --git a/src/grep/lib/closeout.c b/src/grep/lib/closeout.c
new file mode 100644
index 0000000..a0c935f
--- /dev/null
+++ b/src/grep/lib/closeout.c
@@ -0,0 +1,136 @@
+/* Close standard output and standard error, exiting with a diagnostic on error.
+
+   Copyright (C) 1998-2002, 2004, 2006, 2008-2021 Free Software Foundation,
+   Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "closeout.h"
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+#include "close-stream.h"
+#include "error.h"
+#include "exitfail.h"
+#include "quotearg.h"
+
+#ifndef __has_feature
+# define __has_feature(a) false
+#endif
+
+#if defined __SANITIZE_ADDRESS__ || __has_feature (address_sanitizer)
+enum { SANITIZE_ADDRESS = true };
+#else
+enum { SANITIZE_ADDRESS = false };
+#endif
+
+static const char *file_name;
+
+/* Set the file name to be reported in the event an error is detected
+   by close_stdout.  */
+void
+close_stdout_set_file_name (const char *file)
+{
+  file_name = file;
+}
+
+static bool ignore_EPIPE /* = false */;
+
+/* Specify the reaction to an EPIPE error during the closing of stdout:
+     - If ignore = true, it shall be ignored.
+     - If ignore = false, it shall evoke a diagnostic, along with a nonzero
+       exit status.
+   The default is ignore = false.
+
+   This setting matters only if the SIGPIPE signal is ignored (i.e. its
+   handler set to SIG_IGN) or blocked.  Only particular programs need to
+   temporarily ignore SIGPIPE.  If SIGPIPE is ignored or blocked because
+   it was ignored or blocked in the parent process when it created the
+   child process, it usually is a bug in the parent process: It is bad
+   practice to have SIGPIPE ignored or blocked while creating a child
+   process.
+
+   EPIPE occurs when writing to a pipe or socket that has no readers now,
+   when SIGPIPE is ignored or blocked.
+
+   The ignore = false setting is suitable for a scenario where it is normally
+   guaranteed that the pipe writer terminates before the pipe reader.  In
+   this case, an EPIPE is an indication of a premature termination of the
+   pipe reader and should lead to a diagnostic and a nonzero exit status.
+
+   The ignore = true setting is suitable for a scenario where you don't know
+   ahead of time whether the pipe writer or the pipe reader will terminate
+   first.  In this case, an EPIPE is an indication that the pipe writer can
+   stop doing useless write() calls; this is what close_stdout does anyway.
+   EPIPE is part of the normal pipe/socket shutdown protocol in this case,
+   and should not lead to a diagnostic message.  */
+
+void
+close_stdout_set_ignore_EPIPE (bool ignore)
+{
+  ignore_EPIPE = ignore;
+}
+
+/* Close standard output.  On error, issue a diagnostic and _exit
+   with status 'exit_failure'.
+
+   Also close standard error.  On error, _exit with status 'exit_failure'.
+
+   Since close_stdout is commonly registered via 'atexit', POSIX
+   and the C standard both say that it should not call 'exit',
+   because the behavior is undefined if 'exit' is called more than
+   once.  So it calls '_exit' instead of 'exit'.  If close_stdout
+   is registered via atexit before other functions are registered,
+   the other functions can act before this _exit is invoked.
+
+   Applications that use close_stdout should flush any streams
+   other than stdout and stderr before exiting, since the call to
+   _exit will bypass other buffer flushing.  Applications should
+   be flushing and closing other streams anyway, to check for I/O
+   errors.  Also, applications should not use tmpfile, since _exit
+   can bypass the removal of these files.
+
+   It's important to detect such failures and exit nonzero because many
+   tools (most notably 'make' and other build-management systems) depend
+   on being able to detect failure in other tools via their exit status.  */
+
+void
+close_stdout (void)
+{
+  if (close_stream (stdout) != 0
+      && !(ignore_EPIPE && errno == EPIPE))
+    {
+      char const *write_error = _("write error");
+      if (file_name)
+        error (0, errno, "%s: %s", quotearg_colon (file_name),
+               write_error);
+      else
+        error (0, errno, "%s", write_error);
+
+      _exit (exit_failure);
+    }
+
+  /* Close stderr only if not sanitizing, as sanitizers may report to
+     stderr after this function returns.  */
+  if (!SANITIZE_ADDRESS && close_stream (stderr) != 0)
+    _exit (exit_failure);
+}
diff --git a/src/grep/lib/closeout.h b/src/grep/lib/closeout.h
new file mode 100644
index 0000000..68a6425
--- /dev/null
+++ b/src/grep/lib/closeout.h
@@ -0,0 +1,36 @@
+/* Close standard output and standard error.
+
+   Copyright (C) 1998, 2000, 2003-2004, 2006, 2008-2021 Free Software
+   Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef CLOSEOUT_H
+# define CLOSEOUT_H 1
+
+# include <stdbool.h>
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+void close_stdout_set_file_name (const char *file);
+void close_stdout_set_ignore_EPIPE (bool ignore);
+void close_stdout (void);
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
diff --git a/src/grep/lib/colorize-posix.c b/src/grep/lib/colorize-posix.c
new file mode 100644
index 0000000..977ea5b
--- /dev/null
+++ b/src/grep/lib/colorize-posix.c
@@ -0,0 +1,58 @@
+/* Output colorization.
+   Copyright 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+/* Without this pragma, gcc 4.7.0 20120102 suggests that the
+   init_colorize function might be candidate for attribute 'const'  */
+#if (__GNUC__ == 4 && 6 <= __GNUC_MINOR__) || 4 < __GNUC__
+# pragma GCC diagnostic ignored "-Wsuggest-attribute=const"
+#endif
+
+#include <config.h>
+
+#include "colorize.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+/* Return non-zero if we should highlight matches in output to file
+   descriptor FD.  */
+int
+should_colorize (void)
+{
+  char const *t = getenv ("TERM");
+  return t && strcmp (t, "dumb") != 0;
+}
+
+void init_colorize (void) { }
+
+/* Start a colorized text attribute on stdout using the SGR_START
+   format; the attribute is specified by SGR_SEQ.  */
+void
+print_start_colorize (char const *sgr_start, char const *sgr_seq)
+{
+  printf (sgr_start, sgr_seq);
+}
+
+/* Restore the normal text attribute using the SGR_END string.  */
+void
+print_end_colorize (char const *sgr_end)
+{
+  fputs (sgr_end, stdout);
+}
diff --git a/src/grep/lib/colorize-w32.c b/src/grep/lib/colorize-w32.c
new file mode 100644
index 0000000..a6e8d09
--- /dev/null
+++ b/src/grep/lib/colorize-w32.c
@@ -0,0 +1,208 @@
+/* Output colorization on MS-Windows.
+   Copyright 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+/* Written by Eli Zaretskii.  */
+
+#include <config.h>
+
+#include "colorize.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#undef DATADIR	/* conflicts with objidl.h, which is included by windows.h */
+#include <windows.h>
+
+static HANDLE hstdout = INVALID_HANDLE_VALUE;
+static SHORT norm_attr;
+
+/* Initialize the normal text attribute used by the console.  */
+void
+init_colorize (void)
+{
+  CONSOLE_SCREEN_BUFFER_INFO csbi;
+
+  hstdout = GetStdHandle (STD_OUTPUT_HANDLE);
+  if (hstdout != INVALID_HANDLE_VALUE
+      && GetConsoleScreenBufferInfo (hstdout, &csbi))
+     norm_attr = csbi.wAttributes;
+  else
+    hstdout = INVALID_HANDLE_VALUE;
+}
+
+/* Return non-zero if we should highlight matches in output.  */
+int
+should_colorize (void)
+{
+  /* $TERM is not normally defined on DOS/Windows, so don't require
+     it for highlighting.  But some programs, like Emacs, do define
+     it when running Grep as a subprocess, so make sure they don't
+     set TERM=dumb.  */
+  char const *t = getenv ("TERM");
+  return ! (t && strcmp (t, "dumb") == 0);
+}
+
+/* Convert a color spec, a semi-colon separated list of the form
+   "NN;MM;KK;...", where each number is a value of the SGR parameter,
+   into the corresponding Windows console text attribute.
+
+   This function supports a subset of the SGR rendition aspects that
+   the Windows console can display.  */
+static int
+w32_sgr2attr (const char *sgr_seq)
+{
+  const char *s, *p;
+  int code, fg = norm_attr & 15, bg = norm_attr & (15 << 4);
+  int bright = 0, inverse = 0;
+  static const int fg_color[] = {
+    0,			/* black */
+    FOREGROUND_RED,	/* red */
+    FOREGROUND_GREEN,	/* green */
+    FOREGROUND_GREEN | FOREGROUND_RED, /* yellow */
+    FOREGROUND_BLUE,		       /* blue */
+    FOREGROUND_BLUE | FOREGROUND_RED,  /* magenta */
+    FOREGROUND_BLUE | FOREGROUND_GREEN, /* cyan */
+    FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE /* gray */
+  };
+  static const int bg_color[] = {
+    0,			/* black */
+    BACKGROUND_RED,	/* red */
+    BACKGROUND_GREEN,	/* green */
+    BACKGROUND_GREEN | BACKGROUND_RED, /* yellow */
+    BACKGROUND_BLUE,		       /* blue */
+    BACKGROUND_BLUE | BACKGROUND_RED,  /* magenta */
+    BACKGROUND_BLUE | BACKGROUND_GREEN, /* cyan */
+    BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE /* gray */
+  };
+
+  for (s = p = sgr_seq; *s; p++)
+    {
+      if (*p == ';' || *p == '\0')
+        {
+          code = strtol (s, NULL, 10);
+          s = p + (*p != '\0');
+
+          switch (code)
+            {
+            case 0:	/* all attributes off */
+              fg = norm_attr & 15;
+              bg = norm_attr & (15 << 4);
+              bright = 0;
+              inverse = 0;
+              break;
+            case 1:	/* intensity on */
+              bright = 1;
+              break;
+            case 7:	/* inverse video */
+              inverse = 1;
+              break;
+            case 22:	/* intensity off */
+              bright = 0;
+              break;
+            case 27:	/* inverse off */
+              inverse = 0;
+              break;
+            case 30: case 31: case 32: case 33: /* foreground color */
+            case 34: case 35: case 36: case 37:
+              fg = fg_color[code - 30];
+              break;
+            case 39:	/* default foreground */
+              fg = norm_attr & 15;
+              break;
+            case 40: case 41: case 42: case 43: /* background color */
+            case 44: case 45: case 46: case 47:
+              bg = bg_color[code - 40];
+              break;
+            case 49:	/* default background */
+              bg = norm_attr & (15 << 4);
+              break;
+            default:
+              break;
+            }
+        }
+    }
+  if (inverse)
+    {
+      int t = fg;
+      fg = (bg >> 4);
+      bg = (t << 4);
+    }
+  if (bright)
+    fg |= FOREGROUND_INTENSITY;
+
+  return (bg & (15 << 4)) | (fg & 15);
+}
+
+/* Start a colorized text attribute on stdout using the SGR_START
+   format; the attribute is specified by SGR_SEQ.  */
+void
+print_start_colorize (char const *sgr_start, char const *sgr_seq)
+{
+  /* If stdout is connected to a console, set the console text
+     attribute directly instead of using SGR_START.  Otherwise, use
+     SGR_START to emit the SGR escape sequence as on Posix platforms;
+     this is needed when Grep is invoked as a subprocess of another
+     program, such as Emacs, which will handle the display of the
+     matches.  */
+  if (hstdout != INVALID_HANDLE_VALUE)
+    {
+      SHORT attr = w32_sgr2attr (sgr_seq);
+      SetConsoleTextAttribute (hstdout, attr);
+    }
+  else
+    printf (sgr_start, sgr_seq);
+}
+
+/* Clear to the end of the current line with the default attribute.
+   This is needed for reasons similar to those that require the "EL to
+   Right after SGR" operation on Posix platforms: if we don't do this,
+   setting the 'mt', 'ms', or 'mc' capabilities to use a non-default
+   background color spills that color to the empty space at the end of
+   the last screen line in a match whose line spans multiple screen
+   lines.  */
+static void
+w32_clreol (void)
+{
+  DWORD nchars;
+  COORD start_pos;
+  DWORD written;
+  CONSOLE_SCREEN_BUFFER_INFO csbi;
+
+  GetConsoleScreenBufferInfo (hstdout, &csbi);
+  start_pos = csbi.dwCursorPosition;
+  nchars = csbi.dwSize.X - start_pos.X;
+
+  FillConsoleOutputAttribute (hstdout, norm_attr, nchars, start_pos,
+                              &written);
+  FillConsoleOutputCharacter (hstdout, ' ', nchars, start_pos, &written);
+}
+
+/* Restore the normal text attribute using the SGR_END string.  */
+void
+print_end_colorize (char const *sgr_end)
+{
+  if (hstdout != INVALID_HANDLE_VALUE)
+    {
+      SetConsoleTextAttribute (hstdout, norm_attr);
+      w32_clreol ();
+    }
+  else
+    fputs (sgr_end, stdout);
+}
diff --git a/src/grep/lib/colorize.h b/src/grep/lib/colorize.h
new file mode 100644
index 0000000..c027ad9
--- /dev/null
+++ b/src/grep/lib/colorize.h
@@ -0,0 +1,22 @@
+/* Output colorization.
+
+   Copyright 2011-2021 Free Software Foundation, Inc.
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+extern int should_colorize (void);
+extern void init_colorize (void);
+extern void print_start_colorize (char const *sgr_start, char const *sgr_seq);
+extern void print_end_colorize (char const *sgr_end);
diff --git a/src/grep/lib/creat-safer.c b/src/grep/lib/creat-safer.c
new file mode 100644
index 0000000..4e3c61c
--- /dev/null
+++ b/src/grep/lib/creat-safer.c
@@ -0,0 +1,31 @@
+/* Invoke creat, but avoid some glitches.
+
+   Copyright (C) 2005-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering.  */
+
+#include <config.h>
+
+#include "fcntl-safer.h"
+
+#include <fcntl.h>
+#include "unistd-safer.h"
+
+int
+creat_safer (char const *file, mode_t mode)
+{
+  return fd_safer (creat (file, mode));
+}
diff --git a/src/grep/lib/ctype.in.h b/src/grep/lib/ctype.in.h
new file mode 100644
index 0000000..70ad70b
--- /dev/null
+++ b/src/grep/lib/ctype.in.h
@@ -0,0 +1,57 @@
+/* A substitute for ISO C99 <ctype.h>, for platforms on which it is incomplete.
+
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible.  */
+
+/*
+ * ISO C 99 <ctype.h> for platforms on which it is incomplete.
+ * <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/ctype.h.html>
+ */
+
+#ifndef _@GUARD_PREFIX@_CTYPE_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* Include the original <ctype.h>.  */
+/* The include_next requires a split double-inclusion guard.  */
+#@INCLUDE_NEXT@ @NEXT_CTYPE_H@
+
+#ifndef _@GUARD_PREFIX@_CTYPE_H
+#define _@GUARD_PREFIX@_CTYPE_H
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+/* Return non-zero if c is a blank, i.e. a space or tab character.  */
+#if @GNULIB_ISBLANK@
+# if !@HAVE_ISBLANK@
+_GL_EXTERN_C int isblank (int c);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef isblank
+# if HAVE_RAW_DECL_ISBLANK
+_GL_WARN_ON_USE (isblank, "isblank is unportable - "
+                 "use gnulib module isblank for portability");
+# endif
+#endif
+
+#endif /* _@GUARD_PREFIX@_CTYPE_H */
+#endif /* _@GUARD_PREFIX@_CTYPE_H */
diff --git a/src/grep/lib/cycle-check.c b/src/grep/lib/cycle-check.c
new file mode 100644
index 0000000..f064863
--- /dev/null
+++ b/src/grep/lib/cycle-check.c
@@ -0,0 +1,85 @@
+/* help detect directory cycles efficiently
+
+   Copyright (C) 2003-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering */
+
+#include <config.h>
+
+#include "cycle-check.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+#include "assure.h"
+
+#define CC_MAGIC 9827862
+
+/* Return true if I is a power of 2, or is zero.  */
+
+static bool
+is_zero_or_power_of_two (uintmax_t i)
+{
+  return (i & (i - 1)) == 0;
+}
+
+void
+cycle_check_init (struct cycle_check_state *state)
+{
+  state->chdir_counter = 0;
+  state->magic = CC_MAGIC;
+}
+
+/* In traversing a directory hierarchy, call this function once for each
+   descending chdir call, with SB corresponding to the chdir operand.
+   If SB corresponds to a directory that has already been seen,
+   return true to indicate that there is a directory cycle.
+   Note that this is done "lazily", which means that some of
+   the directories in the cycle may be processed twice before
+   the cycle is detected.  */
+
+bool
+cycle_check (struct cycle_check_state *state, struct stat const *sb)
+{
+  assure (state->magic == CC_MAGIC);
+
+  /* If the current directory ever happens to be the same
+     as the one we last recorded for the cycle detection,
+     then it's obviously part of a cycle.  */
+  if (state->chdir_counter && SAME_INODE (*sb, state->dev_ino))
+    return true;
+
+  /* If the number of "descending" chdir calls is a power of two,
+     record the dev/ino of the current directory.  */
+  if (is_zero_or_power_of_two (++(state->chdir_counter)))
+    {
+      /* On all architectures that we know about, if the counter
+         overflows then there is a directory cycle here somewhere,
+         even if we haven't detected it yet.  Typically this happens
+         only after the counter is incremented 2**64 times, so it's a
+         fairly theoretical point.  */
+      if (state->chdir_counter == 0)
+        return true;
+
+      state->dev_ino.st_dev = sb->st_dev;
+      state->dev_ino.st_ino = sb->st_ino;
+    }
+
+  return false;
+}
diff --git a/src/grep/lib/cycle-check.h b/src/grep/lib/cycle-check.h
new file mode 100644
index 0000000..84bf08a
--- /dev/null
+++ b/src/grep/lib/cycle-check.h
@@ -0,0 +1,52 @@
+/* help detect directory cycles efficiently
+
+   Copyright (C) 2003-2004, 2006, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering */
+
+#ifndef CYCLE_CHECK_H
+# define CYCLE_CHECK_H 1
+
+# include <stdint.h>
+# include <stdbool.h>
+# include "dev-ino.h"
+# include "same-inode.h"
+
+struct cycle_check_state
+{
+  struct dev_ino dev_ino;
+  uintmax_t chdir_counter;
+  int magic;
+};
+
+void cycle_check_init (struct cycle_check_state *state);
+bool cycle_check (struct cycle_check_state *state, struct stat const *sb);
+
+# define CYCLE_CHECK_REFLECT_CHDIR_UP(State, SB_dir, SB_subdir) \
+  do                                                            \
+    {                                                           \
+      /* You must call cycle_check at least once before using this macro.  */ \
+      if ((State)->chdir_counter == 0)                          \
+        abort ();                                               \
+      if (SAME_INODE ((State)->dev_ino, SB_subdir))             \
+        {                                                       \
+          (State)->dev_ino.st_dev = (SB_dir).st_dev;            \
+          (State)->dev_ino.st_ino = (SB_dir).st_ino;            \
+        }                                                       \
+    }                                                           \
+  while (0)
+
+#endif
diff --git a/src/grep/lib/dev-ino.h b/src/grep/lib/dev-ino.h
new file mode 100644
index 0000000..7cf1e5f
--- /dev/null
+++ b/src/grep/lib/dev-ino.h
@@ -0,0 +1,31 @@
+/* A simple (device, inode) struct.
+   Copyright (C) 2003-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering, 2003.  */
+
+#ifndef DEV_INO_H
+# define DEV_INO_H 1
+
+# include <sys/types.h>
+# include <sys/stat.h>
+
+struct dev_ino
+{
+  ino_t st_ino;
+  dev_t st_dev;
+};
+
+#endif
diff --git a/src/grep/lib/dfa.c b/src/grep/lib/dfa.c
new file mode 100644
index 0000000..3f85e75
--- /dev/null
+++ b/src/grep/lib/dfa.c
@@ -0,0 +1,4372 @@
+/* dfa.c - deterministic extended regexp routines for GNU
+   Copyright (C) 1988, 1998, 2000, 2002, 2004-2005, 2007-2021 Free Software
+   Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc.,
+   51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA */
+
+/* Written June, 1988 by Mike Haertel
+   Modified July, 1988 by Arthur David Olson to assist BMG speedups  */
+
+#include <config.h>
+
+#include "dfa.h"
+
+#include "flexmember.h"
+#include "idx.h"
+#include "verify.h"
+
+#include <assert.h>
+#include <ctype.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <string.h>
+
+/* Pacify gcc -Wanalyzer-null-dereference in areas where GCC
+   understandably cannot deduce that the input comes from a
+   well-formed regular expression.  There's little point to the
+   runtime overhead of 'assert' instead of 'assume_nonnull' when the
+   MMU will check anyway.  */
+#define assume_nonnull(x) assume ((x) != NULL)
+
+static bool
+streq (char const *a, char const *b)
+{
+  return strcmp (a, b) == 0;
+}
+
+static bool
+isasciidigit (char c)
+{
+  return '0' <= c && c <= '9';
+}
+
+#include "gettext.h"
+#define _(str) gettext (str)
+
+#include <wchar.h>
+
+#include "xalloc.h"
+#include "localeinfo.h"
+
+#ifndef FALLTHROUGH
+# if 201710L < __STDC_VERSION__
+#  define FALLTHROUGH [[__fallthrough__]]
+# elif (__GNUC__ >= 7) || (__clang_major__ >= 10)
+#  define FALLTHROUGH __attribute__ ((__fallthrough__))
+# else
+#  define FALLTHROUGH ((void) 0)
+# endif
+#endif
+
+#ifndef MIN
+# define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
+
+/* HPUX defines these as macros in sys/param.h.  */
+#ifdef setbit
+# undef setbit
+#endif
+#ifdef clrbit
+# undef clrbit
+#endif
+
+/* For code that does not use Gnulib’s isblank module.  */
+#if !defined isblank && !defined HAVE_ISBLANK && !defined GNULIB_ISBLANK
+# define isblank dfa_isblank
+static int
+isblank (int c)
+{
+  return c == ' ' || c == '\t';
+}
+#endif
+
+/* First integer value that is greater than any character code.  */
+enum { NOTCHAR = 1 << CHAR_BIT };
+
+#ifdef UINT_LEAST64_MAX
+
+/* Number of bits used in a charclass word.  */
+enum { CHARCLASS_WORD_BITS = 64 };
+
+/* This represents part of a character class.  It must be unsigned and
+   at least CHARCLASS_WORD_BITS wide.  Any excess bits are zero.  */
+typedef uint_least64_t charclass_word;
+
+/* Part of a charclass initializer that represents 64 bits' worth of a
+   charclass, where LO and HI are the low and high-order 32 bits of
+   the 64-bit quantity.  */
+# define CHARCLASS_PAIR(lo, hi) (((charclass_word) (hi) << 32) + (lo))
+
+#else
+/* Fallbacks for pre-C99 hosts that lack 64-bit integers.  */
+enum { CHARCLASS_WORD_BITS = 32 };
+typedef unsigned long charclass_word;
+# define CHARCLASS_PAIR(lo, hi) lo, hi
+#endif
+
+/* An initializer for a charclass whose 32-bit words are A through H.  */
+#define CHARCLASS_INIT(a, b, c, d, e, f, g, h)		\
+   {{							\
+      CHARCLASS_PAIR (a, b), CHARCLASS_PAIR (c, d),	\
+      CHARCLASS_PAIR (e, f), CHARCLASS_PAIR (g, h)	\
+   }}
+
+/* The maximum useful value of a charclass_word; all used bits are 1.  */
+static charclass_word const CHARCLASS_WORD_MASK
+  = ((charclass_word) 1 << (CHARCLASS_WORD_BITS - 1) << 1) - 1;
+
+/* Number of words required to hold a bit for every character.  */
+enum
+{
+  CHARCLASS_WORDS = (NOTCHAR + CHARCLASS_WORD_BITS - 1) / CHARCLASS_WORD_BITS
+};
+
+/* Sets of unsigned characters are stored as bit vectors in arrays of ints.  */
+typedef struct { charclass_word w[CHARCLASS_WORDS]; } charclass;
+
+/* Convert a possibly-signed character to an unsigned character.  This is
+   a bit safer than casting to unsigned char, since it catches some type
+   errors that the cast doesn't.  */
+static unsigned char
+to_uchar (char ch)
+{
+  return ch;
+}
+
+/* Contexts tell us whether a character is a newline or a word constituent.
+   Word-constituent characters are those that satisfy iswalnum, plus '_'.
+   Each character has a single CTX_* value; bitmasks of CTX_* values denote
+   a particular character class.
+
+   A state also stores a context value, which is a bitmask of CTX_* values.
+   A state's context represents a set of characters that the state's
+   predecessors must match.  For example, a state whose context does not
+   include CTX_LETTER will never have transitions where the previous
+   character is a word constituent.  A state whose context is CTX_ANY
+   might have transitions from any character.  */
+
+enum
+  {
+    CTX_NONE = 1,
+    CTX_LETTER = 2,
+    CTX_NEWLINE = 4,
+    CTX_ANY = 7
+  };
+
+/* Sometimes characters can only be matched depending on the surrounding
+   context.  Such context decisions depend on what the previous character
+   was, and the value of the current (lookahead) character.  Context
+   dependent constraints are encoded as 9-bit integers.  Each bit that
+   is set indicates that the constraint succeeds in the corresponding
+   context.
+
+   bit 6-8  - valid contexts when next character is CTX_NEWLINE
+   bit 3-5  - valid contexts when next character is CTX_LETTER
+   bit 0-2  - valid contexts when next character is CTX_NONE
+
+   succeeds_in_context determines whether a given constraint
+   succeeds in a particular context.  Prev is a bitmask of possible
+   context values for the previous character, curr is the (single-bit)
+   context value for the lookahead character.  */
+static int
+newline_constraint (int constraint)
+{
+  return (constraint >> 6) & 7;
+}
+static int
+letter_constraint (int constraint)
+{
+  return (constraint >> 3) & 7;
+}
+static int
+other_constraint (int constraint)
+{
+  return constraint & 7;
+}
+
+static bool
+succeeds_in_context (int constraint, int prev, int curr)
+{
+  return !! (((curr & CTX_NONE      ? other_constraint (constraint) : 0) \
+              | (curr & CTX_LETTER  ? letter_constraint (constraint) : 0) \
+              | (curr & CTX_NEWLINE ? newline_constraint (constraint) : 0)) \
+             & prev);
+}
+
+/* The following describe what a constraint depends on.  */
+static bool
+prev_newline_dependent (int constraint)
+{
+  return ((constraint ^ constraint >> 2) & 0111) != 0;
+}
+static bool
+prev_letter_dependent (int constraint)
+{
+  return ((constraint ^ constraint >> 1) & 0111) != 0;
+}
+
+/* Tokens that match the empty string subject to some constraint actually
+   work by applying that constraint to determine what may follow them,
+   taking into account what has gone before.  The following values are
+   the constraints corresponding to the special tokens previously defined.  */
+enum
+  {
+    NO_CONSTRAINT = 0777,
+    BEGLINE_CONSTRAINT = 0444,
+    ENDLINE_CONSTRAINT = 0700,
+    BEGWORD_CONSTRAINT = 0050,
+    ENDWORD_CONSTRAINT = 0202,
+    LIMWORD_CONSTRAINT = 0252,
+    NOTLIMWORD_CONSTRAINT = 0525
+  };
+
+/* The regexp is parsed into an array of tokens in postfix form.  Some tokens
+   are operators and others are terminal symbols.  Most (but not all) of these
+   codes are returned by the lexical analyzer.  */
+
+typedef ptrdiff_t token;
+static token const TOKEN_MAX = PTRDIFF_MAX;
+
+/* States are indexed by state_num values.  These are normally
+   nonnegative but -1 is used as a special value.  */
+typedef ptrdiff_t state_num;
+
+/* Predefined token values.  */
+enum
+{
+  END = -1,                     /* END is a terminal symbol that matches the
+                                   end of input; any value of END or less in
+                                   the parse tree is such a symbol.  Accepting
+                                   states of the DFA are those that would have
+                                   a transition on END.  This is -1, not some
+                                   more-negative value, to tweak the speed of
+                                   comparisons to END.  */
+
+  /* Ordinary character values are terminal symbols that match themselves.  */
+
+  /* CSET must come last in the following list of special tokens.  Otherwise,
+     the list order matters only for performance.  Related special tokens
+     should have nearby values so that code like (t == ANYCHAR || t == MBCSET
+     || CSET <= t) can be done with a single machine-level comparison.  */
+
+  EMPTY = NOTCHAR,              /* EMPTY is a terminal symbol that matches
+                                   the empty string.  */
+
+  QMARK,                        /* QMARK is an operator of one argument that
+                                   matches zero or one occurrences of its
+                                   argument.  */
+
+  STAR,                         /* STAR is an operator of one argument that
+                                   matches the Kleene closure (zero or more
+                                   occurrences) of its argument.  */
+
+  PLUS,                         /* PLUS is an operator of one argument that
+                                   matches the positive closure (one or more
+                                   occurrences) of its argument.  */
+
+  REPMN,                        /* REPMN is a lexical token corresponding
+                                   to the {m,n} construct.  REPMN never
+                                   appears in the compiled token vector.  */
+
+  CAT,                          /* CAT is an operator of two arguments that
+                                   matches the concatenation of its
+                                   arguments.  CAT is never returned by the
+                                   lexical analyzer.  */
+
+  OR,                           /* OR is an operator of two arguments that
+                                   matches either of its arguments.  */
+
+  LPAREN,                       /* LPAREN never appears in the parse tree,
+                                   it is only a lexeme.  */
+
+  RPAREN,                       /* RPAREN never appears in the parse tree.  */
+
+#if defined(KMK_GREP) && defined(KBUILD_OS_WINDOWS)
+# define WCHAR DFA_WCHAR
+#endif
+  WCHAR,                        /* Only returned by lex.  wctok contains
+                                   the wide character representation.  */
+
+  ANYCHAR,                      /* ANYCHAR is a terminal symbol that matches
+                                   a valid multibyte (or single byte) character.
+                                   It is used only if MB_CUR_MAX > 1.  */
+
+  BEG,                          /* BEG is an initial symbol that matches the
+                                   beginning of input.  */
+
+  BEGLINE,                      /* BEGLINE is a terminal symbol that matches
+                                   the empty string at the beginning of a
+                                   line.  */
+
+  ENDLINE,                      /* ENDLINE is a terminal symbol that matches
+                                   the empty string at the end of a line.  */
+
+  BEGWORD,                      /* BEGWORD is a terminal symbol that matches
+                                   the empty string at the beginning of a
+                                   word.  */
+
+  ENDWORD,                      /* ENDWORD is a terminal symbol that matches
+                                   the empty string at the end of a word.  */
+
+  LIMWORD,                      /* LIMWORD is a terminal symbol that matches
+                                   the empty string at the beginning or the
+                                   end of a word.  */
+
+  NOTLIMWORD,                   /* NOTLIMWORD is a terminal symbol that
+                                   matches the empty string not at
+                                   the beginning or end of a word.  */
+
+  BACKREF,                      /* BACKREF is generated by \<digit>
+                                   or by any other construct that
+                                   is not completely handled.  If the scanner
+                                   detects a transition on backref, it returns
+                                   a kind of "semi-success" indicating that
+                                   the match will have to be verified with
+                                   a backtracking matcher.  */
+
+  MBCSET,                       /* MBCSET is similar to CSET, but for
+                                   multibyte characters.  */
+
+  CSET                          /* CSET and (and any value greater) is a
+                                   terminal symbol that matches any of a
+                                   class of characters.  */
+};
+
+
+/* States of the recognizer correspond to sets of positions in the parse
+   tree, together with the constraints under which they may be matched.
+   So a position is encoded as an index into the parse tree together with
+   a constraint.  */
+typedef struct
+{
+  idx_t index;			/* Index into the parse array.  */
+  unsigned int constraint;      /* Constraint for matching this position.  */
+} position;
+
+/* Sets of positions are stored as arrays.  */
+typedef struct
+{
+  position *elems;              /* Elements of this position set.  */
+  idx_t nelem;			/* Number of elements in this set.  */
+  idx_t alloc;			/* Number of elements allocated in ELEMS.  */
+} position_set;
+
+/* A state of the dfa consists of a set of positions, some flags,
+   and the token value of the lowest-numbered position of the state that
+   contains an END token.  */
+typedef struct
+{
+  size_t hash;                  /* Hash of the positions of this state.  */
+  position_set elems;           /* Positions this state could match.  */
+  unsigned char context;        /* Context from previous state.  */
+  unsigned short constraint;    /* Constraint for this state to accept.  */
+  position_set mbps;            /* Positions which can match multibyte
+                                   characters or the follows, e.g., period.
+                                   Used only if MB_CUR_MAX > 1.  */
+  state_num mb_trindex;         /* Index of this state in MB_TRANS, or
+                                   negative if the state does not have
+                                   ANYCHAR.  */
+} dfa_state;
+
+/* Maximum for any transition table count.  This should be at least 3,
+   for the initial state setup.  */
+enum { MAX_TRCOUNT = 1024 };
+
+/* A bracket operator.
+   e.g., [a-c], [[:alpha:]], etc.  */
+struct mb_char_classes
+{
+  ptrdiff_t cset;
+  bool invert;
+  wchar_t *chars;               /* Normal characters.  */
+  idx_t nchars;
+  idx_t nchars_alloc;
+};
+
+struct regex_syntax
+{
+  /* Syntax bits controlling the behavior of the lexical analyzer.  */
+  reg_syntax_t syntax_bits;
+  bool syntax_bits_set;
+
+  /* Flag for case-folding letters into sets.  */
+  bool case_fold;
+
+  /* True if ^ and $ match only the start and end of data, and do not match
+     end-of-line within data.  */
+  bool anchor;
+
+  /* End-of-line byte in data.  */
+  unsigned char eolbyte;
+
+  /* Cache of char-context values.  */
+  char sbit[NOTCHAR];
+
+  /* If never_trail[B], the byte B cannot be a non-initial byte in a
+     multibyte character.  */
+  bool never_trail[NOTCHAR];
+
+  /* Set of characters considered letters.  */
+  charclass letters;
+
+  /* Set of characters that are newline.  */
+  charclass newline;
+};
+
+/* Lexical analyzer.  All the dross that deals with the obnoxious
+   GNU Regex syntax bits is located here.  The poor, suffering
+   reader is referred to the GNU Regex documentation for the
+   meaning of the @#%!@#%^!@ syntax bits.  */
+struct lexer_state
+{
+  char const *ptr;	/* Pointer to next input character.  */
+  idx_t left;		/* Number of characters remaining.  */
+  token lasttok;	/* Previous token returned; initially END.  */
+  idx_t parens;		/* Count of outstanding left parens.  */
+  int minrep, maxrep;	/* Repeat counts for {m,n}.  */
+
+  /* Wide character representation of the current multibyte character,
+     or WEOF if there was an encoding error.  Used only if
+     MB_CUR_MAX > 1.  */
+  wint_t wctok;
+
+  /* The most recently analyzed multibyte bracket expression.  */
+  struct mb_char_classes brack;
+
+  /* We're separated from beginning or (, | only by zero-width characters.  */
+  bool laststart;
+};
+
+/* Recursive descent parser for regular expressions.  */
+
+struct parser_state
+{
+  token tok;               /* Lookahead token.  */
+  idx_t depth;		   /* Current depth of a hypothetical stack
+                              holding deferred productions.  This is
+                              used to determine the depth that will be
+                              required of the real stack later on in
+                              dfaanalyze.  */
+};
+
+/* A compiled regular expression.  */
+struct dfa
+{
+  /* Fields filled by the scanner.  */
+  charclass *charclasses;       /* Array of character sets for CSET tokens.  */
+  idx_t cindex;			/* Index for adding new charclasses.  */
+  idx_t calloc;			/* Number of charclasses allocated.  */
+  ptrdiff_t canychar;           /* Index of anychar class, or -1.  */
+
+  /* Scanner state */
+  struct lexer_state lex;
+
+  /* Parser state */
+  struct parser_state parse;
+
+  /* Fields filled by the parser.  */
+  token *tokens;                /* Postfix parse array.  */
+  idx_t tindex;			/* Index for adding new tokens.  */
+  idx_t talloc;			/* Number of tokens currently allocated.  */
+  idx_t depth;			/* Depth required of an evaluation stack
+                                   used for depth-first traversal of the
+                                   parse tree.  */
+  idx_t nleaves;		/* Number of non-EMPTY leaves
+                                   in the parse tree.  */
+  idx_t nregexps;		/* Count of parallel regexps being built
+                                   with dfaparse.  */
+  bool fast;			/* The DFA is fast.  */
+  bool epsilon;			/* Does a token match only the empty string?  */
+  token utf8_anychar_classes[9]; /* To lower ANYCHAR in UTF-8 locales.  */
+  mbstate_t mbs;		/* Multibyte conversion state.  */
+
+  /* The following are valid only if MB_CUR_MAX > 1.  */
+
+  /* The value of multibyte_prop[i] is defined by following rule.
+     if tokens[i] < NOTCHAR
+     bit 0 : tokens[i] is the first byte of a character, including
+     single-byte characters.
+     bit 1 : tokens[i] is the last byte of a character, including
+     single-byte characters.
+
+     e.g.
+     tokens
+     = 'single_byte_a', 'multi_byte_A', single_byte_b'
+     = 'sb_a', 'mb_A(1st byte)', 'mb_A(2nd byte)', 'mb_A(3rd byte)', 'sb_b'
+     multibyte_prop
+     = 3     , 1               ,  0              ,  2              , 3
+   */
+  char *multibyte_prop;
+
+  /* Fields filled by the superset.  */
+  struct dfa *superset;             /* Hint of the dfa.  */
+
+  /* Fields filled by the state builder.  */
+  dfa_state *states;            /* States of the dfa.  */
+  state_num sindex;             /* Index for adding new states.  */
+  idx_t salloc;			/* Number of states currently allocated.  */
+
+  /* Fields filled by the parse tree->NFA conversion.  */
+  position_set *follows;        /* Array of follow sets, indexed by position
+                                   index.  The follow of a position is the set
+                                   of positions containing characters that
+                                   could conceivably follow a character
+                                   matching the given position in a string
+                                   matching the regexp.  Allocated to the
+                                   maximum possible position index.  */
+  bool searchflag;		/* We are supposed to build a searching
+                                   as opposed to an exact matcher.  A searching
+                                   matcher finds the first and shortest string
+                                   matching a regexp anywhere in the buffer,
+                                   whereas an exact matcher finds the longest
+                                   string matching, but anchored to the
+                                   beginning of the buffer.  */
+
+  /* Fields filled by dfaanalyze.  */
+  int *constraints;             /* Array of union of accepting constraints
+                                   in the follow of a position.  */
+  int *separates;               /* Array of contexts on follow of a
+                                   position.  */
+
+  /* Fields filled by dfaexec.  */
+  state_num tralloc;            /* Number of transition tables that have
+                                   slots so far, not counting trans[-1] and
+                                   trans[-2].  */
+  int trcount;                  /* Number of transition tables that have
+                                   been built, other than for initial
+                                   states.  */
+  int min_trcount;              /* Number of initial states.  Equivalently,
+                                   the minimum state number for which trcount
+                                   counts transitions.  */
+  state_num **trans;            /* Transition tables for states that can
+                                   never accept.  If the transitions for a
+                                   state have not yet been computed, or the
+                                   state could possibly accept, its entry in
+                                   this table is NULL.  This points to two
+                                   past the start of the allocated array,
+                                   and trans[-1] and trans[-2] are always
+                                   NULL.  */
+  state_num **fails;            /* Transition tables after failing to accept
+                                   on a state that potentially could do so.
+                                   If trans[i] is non-null, fails[i] must
+                                   be null.  */
+  char *success;                /* Table of acceptance conditions used in
+                                   dfaexec and computed in build_state.  */
+  state_num *newlines;          /* Transitions on newlines.  The entry for a
+                                   newline in any transition table is always
+                                   -1 so we can count lines without wasting
+                                   too many cycles.  The transition for a
+                                   newline is stored separately and handled
+                                   as a special case.  Newline is also used
+                                   as a sentinel at the end of the buffer.  */
+  state_num initstate_notbol;   /* Initial state for CTX_LETTER and CTX_NONE
+                                   context in multibyte locales, in which we
+                                   do not distinguish between their contexts,
+                                   as not supported word.  */
+  position_set mb_follows;      /* Follow set added by ANYCHAR on demand.  */
+  state_num **mb_trans;         /* Transition tables for states with
+                                   ANYCHAR.  */
+  state_num mb_trcount;         /* Number of transition tables for states with
+                                   ANYCHAR that have actually been built.  */
+
+  /* Syntax configuration.  This is near the end so that dfacopysyntax
+     can memset up to here.  */
+  struct regex_syntax syntax;
+
+  /* Information derived from the locale.  This is at the end so that
+     a quick memset need not clear it specially.  */
+
+  /* dfaexec implementation.  */
+  char *(*dfaexec) (struct dfa *, char const *, char *,
+                    bool, ptrdiff_t *, bool *);
+
+  /* Other cached information derived from the locale.  */
+  struct localeinfo localeinfo;
+};
+
+/* User access to dfa internals.  */
+
+/* S could possibly be an accepting state of R.  */
+static bool
+accepting (state_num s, struct dfa const *r)
+{
+  return r->states[s].constraint != 0;
+}
+
+/* STATE accepts in the specified context.  */
+static bool
+accepts_in_context (int prev, int curr, state_num state, struct dfa const *dfa)
+{
+  return succeeds_in_context (dfa->states[state].constraint, prev, curr);
+}
+
+static void regexp (struct dfa *dfa);
+
+/* Store into *PWC the result of converting the leading bytes of the
+   multibyte buffer S of length N bytes, using D->localeinfo.sbctowc
+   and updating the conversion state in *D.  On conversion error,
+   convert just a single byte, to WEOF.  Return the number of bytes
+   converted.
+
+   This differs from mbrtowc (PWC, S, N, &D->mbs) as follows:
+
+   * PWC points to wint_t, not to wchar_t.
+   * The last arg is a dfa *D instead of merely a multibyte conversion
+     state D->mbs.
+   * N is idx_t not size_t, and must be at least 1.
+   * S[N - 1] must be a sentinel byte.
+   * Shift encodings are not supported.
+   * The return value is always in the range 1..N.
+   * D->mbs is always valid afterwards.
+   * *PWC is always set to something.  */
+static int
+mbs_to_wchar (wint_t *pwc, char const *s, idx_t n, struct dfa *d)
+{
+  unsigned char uc = s[0];
+  wint_t wc = d->localeinfo.sbctowc[uc];
+
+  if (wc == WEOF)
+    {
+      wchar_t wch;
+      size_t nbytes = mbrtowc (&wch, s, n, &d->mbs);
+      if (0 < nbytes && nbytes < (size_t) -2)
+        {
+          *pwc = wch;
+          return nbytes;
+        }
+      memset (&d->mbs, 0, sizeof d->mbs);
+    }
+
+  *pwc = wc;
+  return 1;
+}
+
+#ifdef DEBUG
+
+static void
+prtok (token t)
+{
+  if (t <= END)
+    fprintf (stderr, "END");
+  else if (0 <= t && t < NOTCHAR)
+    {
+      unsigned int ch = t;
+      fprintf (stderr, "0x%02x", ch);
+    }
+  else
+    {
+      char const *s;
+      switch (t)
+        {
+        case BEG:
+          s = "BEG";
+          break;
+        case EMPTY:
+          s = "EMPTY";
+          break;
+        case BACKREF:
+          s = "BACKREF";
+          break;
+        case BEGLINE:
+          s = "BEGLINE";
+          break;
+        case ENDLINE:
+          s = "ENDLINE";
+          break;
+        case BEGWORD:
+          s = "BEGWORD";
+          break;
+        case ENDWORD:
+          s = "ENDWORD";
+          break;
+        case LIMWORD:
+          s = "LIMWORD";
+          break;
+        case NOTLIMWORD:
+          s = "NOTLIMWORD";
+          break;
+        case QMARK:
+          s = "QMARK";
+          break;
+        case STAR:
+          s = "STAR";
+          break;
+        case PLUS:
+          s = "PLUS";
+          break;
+        case CAT:
+          s = "CAT";
+          break;
+        case OR:
+          s = "OR";
+          break;
+        case LPAREN:
+          s = "LPAREN";
+          break;
+        case RPAREN:
+          s = "RPAREN";
+          break;
+        case ANYCHAR:
+          s = "ANYCHAR";
+          break;
+        case MBCSET:
+          s = "MBCSET";
+          break;
+        default:
+          s = "CSET";
+          break;
+        }
+      fprintf (stderr, "%s", s);
+    }
+}
+#endif /* DEBUG */
+
+/* Stuff pertaining to charclasses.  */
+
+static bool
+tstbit (unsigned int b, charclass const *c)
+{
+  return c->w[b / CHARCLASS_WORD_BITS] >> b % CHARCLASS_WORD_BITS & 1;
+}
+
+static void
+setbit (unsigned int b, charclass *c)
+{
+  charclass_word one = 1;
+  c->w[b / CHARCLASS_WORD_BITS] |= one << b % CHARCLASS_WORD_BITS;
+}
+
+static void
+clrbit (unsigned int b, charclass *c)
+{
+  charclass_word one = 1;
+  c->w[b / CHARCLASS_WORD_BITS] &= ~(one << b % CHARCLASS_WORD_BITS);
+}
+
+static void
+zeroset (charclass *s)
+{
+  memset (s, 0, sizeof *s);
+}
+
+static void
+fillset (charclass *s)
+{
+  for (int i = 0; i < CHARCLASS_WORDS; i++)
+    s->w[i] = CHARCLASS_WORD_MASK;
+}
+
+static void
+notset (charclass *s)
+{
+  for (int i = 0; i < CHARCLASS_WORDS; ++i)
+    s->w[i] = CHARCLASS_WORD_MASK & ~s->w[i];
+}
+
+static bool
+equal (charclass const *s1, charclass const *s2)
+{
+  charclass_word w = 0;
+  for (int i = 0; i < CHARCLASS_WORDS; i++)
+    w |= s1->w[i] ^ s2->w[i];
+  return w == 0;
+}
+
+static bool
+emptyset (charclass const *s)
+{
+  charclass_word w = 0;
+  for (int i = 0; i < CHARCLASS_WORDS; i++)
+    w |= s->w[i];
+  return w == 0;
+}
+
+/* Ensure that the array addressed by PA holds at least I + 1 items.
+   Either return PA, or reallocate the array and return its new address.
+   Although PA may be null, the returned value is never null.
+
+   The array holds *NITEMS items, where 0 <= I <= *NITEMS; *NITEMS
+   is updated on reallocation.  If PA is null, *NITEMS must be zero.
+   Do not allocate more than NITEMS_MAX items total; -1 means no limit.
+   ITEM_SIZE is the size of one item; it must be positive.
+   Avoid O(N**2) behavior on arrays growing linearly.  */
+static void *
+maybe_realloc (void *pa, idx_t i, idx_t *nitems,
+               ptrdiff_t nitems_max, idx_t item_size)
+{
+  if (i < *nitems)
+    return pa;
+  return xpalloc (pa, nitems, 1, nitems_max, item_size);
+}
+
+/* In DFA D, find the index of charclass S, or allocate a new one.  */
+static idx_t
+charclass_index (struct dfa *d, charclass const *s)
+{
+  idx_t i;
+
+  for (i = 0; i < d->cindex; ++i)
+    if (equal (s, &d->charclasses[i]))
+      return i;
+  d->charclasses = maybe_realloc (d->charclasses, d->cindex, &d->calloc,
+                                  TOKEN_MAX - CSET, sizeof *d->charclasses);
+  ++d->cindex;
+  d->charclasses[i] = *s;
+  return i;
+}
+
+static bool
+unibyte_word_constituent (struct dfa const *dfa, unsigned char c)
+{
+  return dfa->localeinfo.sbctowc[c] != WEOF && (isalnum (c) || (c) == '_');
+}
+
+static int
+char_context (struct dfa const *dfa, unsigned char c)
+{
+  if (c == dfa->syntax.eolbyte && !dfa->syntax.anchor)
+    return CTX_NEWLINE;
+  if (unibyte_word_constituent (dfa, c))
+    return CTX_LETTER;
+  return CTX_NONE;
+}
+
+/* Set a bit in the charclass for the given wchar_t.  Do nothing if WC
+   is represented by a multi-byte sequence.  Even for MB_CUR_MAX == 1,
+   this may happen when folding case in weird Turkish locales where
+   dotless i/dotted I are not included in the chosen character set.
+   Return whether a bit was set in the charclass.  */
+static bool
+setbit_wc (wint_t wc, charclass *c)
+{
+  int b = wctob (wc);
+  if (b < 0)
+    return false;
+
+  setbit (b, c);
+  return true;
+}
+
+/* Set a bit for B and its case variants in the charclass C.
+   MB_CUR_MAX must be 1.  */
+static void
+setbit_case_fold_c (int b, charclass *c)
+{
+  int ub = toupper (b);
+  for (int i = 0; i < NOTCHAR; i++)
+    if (toupper (i) == ub)
+      setbit (i, c);
+}
+
+/* Fetch the next lexical input character from the pattern.  There
+   must at least one byte of pattern input.  Set DFA->lex.wctok to the
+   value of the character or to WEOF depending on whether the input is
+   a valid multibyte character (possibly of length 1).  Then return
+   the next input byte value, except return EOF if the input is a
+   multibyte character of length greater than 1.  */
+static int
+fetch_wc (struct dfa *dfa)
+{
+  int nbytes = mbs_to_wchar (&dfa->lex.wctok, dfa->lex.ptr, dfa->lex.left,
+                             dfa);
+  int c = nbytes == 1 ? to_uchar (dfa->lex.ptr[0]) : EOF;
+  dfa->lex.ptr += nbytes;
+  dfa->lex.left -= nbytes;
+  return c;
+}
+
+/* If there is no more input, report an error about unbalanced brackets.
+   Otherwise, behave as with fetch_wc (DFA).  */
+static int
+bracket_fetch_wc (struct dfa *dfa)
+{
+  if (! dfa->lex.left)
+    dfaerror (_("unbalanced ["));
+  return fetch_wc (dfa);
+}
+
+typedef int predicate (int);
+
+/* The following list maps the names of the Posix named character classes
+   to predicate functions that determine whether a given character is in
+   the class.  The leading [ has already been eaten by the lexical
+   analyzer.  */
+struct dfa_ctype
+{
+  const char *name;
+  predicate *func;
+  bool single_byte_only;
+};
+
+static const struct dfa_ctype prednames[] = {
+  {"alpha", isalpha, false},
+  {"upper", isupper, false},
+  {"lower", islower, false},
+  {"digit", isdigit, true},
+  {"xdigit", isxdigit, false},
+  {"space", isspace, false},
+  {"punct", ispunct, false},
+  {"alnum", isalnum, false},
+  {"print", isprint, false},
+  {"graph", isgraph, false},
+  {"cntrl", iscntrl, false},
+  {"blank", isblank, false},
+  {NULL, NULL, false}
+};
+
+static const struct dfa_ctype *_GL_ATTRIBUTE_PURE
+find_pred (const char *str)
+{
+  for (int i = 0; prednames[i].name; i++)
+    if (streq (str, prednames[i].name))
+      return &prednames[i];
+  return NULL;
+}
+
+/* Parse a bracket expression, which possibly includes multibyte
+   characters.  */
+static token
+parse_bracket_exp (struct dfa *dfa)
+{
+  /* This is a bracket expression that dfaexec is known to
+     process correctly.  */
+  bool known_bracket_exp = true;
+
+  /* Used to warn about [:space:].
+     Bit 0 = first character is a colon.
+     Bit 1 = last character is a colon.
+     Bit 2 = includes any other character but a colon.
+     Bit 3 = includes ranges, char/equiv classes or collation elements.  */
+  int colon_warning_state;
+
+  dfa->lex.brack.nchars = 0;
+  charclass ccl;
+  zeroset (&ccl);
+  int c = bracket_fetch_wc (dfa);
+  bool invert = c == '^';
+  if (invert)
+    {
+      c = bracket_fetch_wc (dfa);
+      known_bracket_exp = dfa->localeinfo.simple;
+    }
+  wint_t wc = dfa->lex.wctok;
+  int c1;
+  wint_t wc1;
+  colon_warning_state = (c == ':');
+  do
+    {
+      c1 = NOTCHAR;	/* Mark c1 as not initialized.  */
+      colon_warning_state &= ~2;
+
+      /* Note that if we're looking at some other [:...:] construct,
+         we just treat it as a bunch of ordinary characters.  We can do
+         this because we assume regex has checked for syntax errors before
+         dfa is ever called.  */
+      if (c == '[')
+        {
+          c1 = bracket_fetch_wc (dfa);
+          wc1 = dfa->lex.wctok;
+
+          if ((c1 == ':' && (dfa->syntax.syntax_bits & RE_CHAR_CLASSES))
+              || c1 == '.' || c1 == '=')
+            {
+              enum { MAX_BRACKET_STRING_LEN = 32 };
+              char str[MAX_BRACKET_STRING_LEN + 1];
+              int len = 0;
+              for (;;)
+                {
+                  c = bracket_fetch_wc (dfa);
+                  if (dfa->lex.left == 0
+                      || (c == c1 && dfa->lex.ptr[0] == ']'))
+                    break;
+                  if (len < MAX_BRACKET_STRING_LEN)
+                    str[len++] = c;
+                  else
+                    /* This is in any case an invalid class name.  */
+                    str[0] = '\0';
+                }
+              str[len] = '\0';
+
+              /* Fetch bracket.  */
+              c = bracket_fetch_wc (dfa);
+              wc = dfa->lex.wctok;
+              if (c1 == ':')
+                /* Build character class.  POSIX allows character
+                   classes to match multicharacter collating elements,
+                   but the regex code does not support that, so do not
+                   worry about that possibility.  */
+                {
+                  char const *class
+                    = (dfa->syntax.case_fold && (streq (str, "upper")
+                                                 || streq (str, "lower"))
+                       ? "alpha" : str);
+                  const struct dfa_ctype *pred = find_pred (class);
+                  if (!pred)
+                    dfaerror (_("invalid character class"));
+
+                  if (dfa->localeinfo.multibyte && !pred->single_byte_only)
+                    known_bracket_exp = false;
+                  else
+                    for (int c2 = 0; c2 < NOTCHAR; ++c2)
+                      if (pred->func (c2))
+                        setbit (c2, &ccl);
+                }
+              else
+                known_bracket_exp = false;
+
+              colon_warning_state |= 8;
+
+              /* Fetch new lookahead character.  */
+              c1 = bracket_fetch_wc (dfa);
+              wc1 = dfa->lex.wctok;
+              continue;
+            }
+
+          /* We treat '[' as a normal character here.  c/c1/wc/wc1
+             are already set up.  */
+        }
+
+      if (c == '\\'
+          && (dfa->syntax.syntax_bits & RE_BACKSLASH_ESCAPE_IN_LISTS))
+        {
+          c = bracket_fetch_wc (dfa);
+          wc = dfa->lex.wctok;
+        }
+
+      if (c1 == NOTCHAR)
+        {
+          c1 = bracket_fetch_wc (dfa);
+          wc1 = dfa->lex.wctok;
+        }
+
+      if (c1 == '-')
+        /* build range characters.  */
+        {
+          int c2 = bracket_fetch_wc (dfa);
+          wint_t wc2 = dfa->lex.wctok;
+
+          /* A bracket expression like [a-[.aa.]] matches an unknown set.
+             Treat it like [-a[.aa.]] while parsing it, and
+             remember that the set is unknown.  */
+          if (c2 == '[' && dfa->lex.ptr[0] == '.')
+            {
+              known_bracket_exp = false;
+              c2 = ']';
+            }
+
+          if (c2 == ']')
+            {
+              /* In the case [x-], the - is an ordinary hyphen,
+                 which is left in c1, the lookahead character.  */
+              dfa->lex.ptr--;
+              dfa->lex.left++;
+            }
+          else
+            {
+              if (c2 == '\\' && (dfa->syntax.syntax_bits
+                                 & RE_BACKSLASH_ESCAPE_IN_LISTS))
+                {
+                  c2 = bracket_fetch_wc (dfa);
+                  wc2 = dfa->lex.wctok;
+                }
+
+              colon_warning_state |= 8;
+              c1 = bracket_fetch_wc (dfa);
+              wc1 = dfa->lex.wctok;
+
+              /* Treat [x-y] as a range if x != y.  */
+              if (wc != wc2 || wc == WEOF)
+                {
+                  if (dfa->localeinfo.simple
+                      || (isasciidigit (c) & isasciidigit (c2)))
+                    {
+                      for (int ci = c; ci <= c2; ci++)
+                        if (dfa->syntax.case_fold && isalpha (ci))
+                          setbit_case_fold_c (ci, &ccl);
+                        else
+                          setbit (ci, &ccl);
+                    }
+                  else
+                    known_bracket_exp = false;
+
+                  continue;
+                }
+            }
+        }
+
+      colon_warning_state |= (c == ':') ? 2 : 4;
+
+      if (!dfa->localeinfo.multibyte)
+        {
+          if (dfa->syntax.case_fold && isalpha (c))
+            setbit_case_fold_c (c, &ccl);
+          else
+            setbit (c, &ccl);
+          continue;
+        }
+
+      if (wc == WEOF)
+        known_bracket_exp = false;
+      else
+        {
+          wchar_t folded[CASE_FOLDED_BUFSIZE + 1];
+          int n = (dfa->syntax.case_fold
+                   ? case_folded_counterparts (wc, folded + 1) + 1
+                   : 1);
+          folded[0] = wc;
+          for (int i = 0; i < n; i++)
+            if (!setbit_wc (folded[i], &ccl))
+              {
+                dfa->lex.brack.chars
+                  = maybe_realloc (dfa->lex.brack.chars, dfa->lex.brack.nchars,
+                                   &dfa->lex.brack.nchars_alloc, -1,
+                                   sizeof *dfa->lex.brack.chars);
+                dfa->lex.brack.chars[dfa->lex.brack.nchars++] = folded[i];
+              }
+        }
+    }
+  while ((wc = wc1, (c = c1) != ']'));
+
+  if (colon_warning_state == 7)
+    dfawarn (_("character class syntax is [[:space:]], not [:space:]"));
+
+  if (! known_bracket_exp)
+    return BACKREF;
+
+  if (dfa->localeinfo.multibyte && (invert || dfa->lex.brack.nchars != 0))
+    {
+      dfa->lex.brack.invert = invert;
+      dfa->lex.brack.cset = emptyset (&ccl) ? -1 : charclass_index (dfa, &ccl);
+      return MBCSET;
+    }
+
+  if (invert)
+    {
+      notset (&ccl);
+      if (dfa->syntax.syntax_bits & RE_HAT_LISTS_NOT_NEWLINE)
+        clrbit ('\n', &ccl);
+    }
+
+  return CSET + charclass_index (dfa, &ccl);
+}
+
+struct lexptr
+{
+  char const *ptr;
+  idx_t left;
+};
+
+static void
+push_lex_state (struct dfa *dfa, struct lexptr *ls, char const *s)
+{
+  ls->ptr = dfa->lex.ptr;
+  ls->left = dfa->lex.left;
+  dfa->lex.ptr = s;
+  dfa->lex.left = strlen (s);
+}
+
+static void
+pop_lex_state (struct dfa *dfa, struct lexptr const *ls)
+{
+  dfa->lex.ptr = ls->ptr;
+  dfa->lex.left = ls->left;
+}
+
+static token
+lex (struct dfa *dfa)
+{
+  bool backslash = false;
+
+  /* Basic plan: We fetch a character.  If it's a backslash,
+     we set the backslash flag and go through the loop again.
+     On the plus side, this avoids having a duplicate of the
+     main switch inside the backslash case.  On the minus side,
+     it means that just about every case begins with
+     "if (backslash) ...".  */
+  for (int i = 0; i < 2; ++i)
+    {
+      if (! dfa->lex.left)
+        return dfa->lex.lasttok = END;
+      int c = fetch_wc (dfa);
+
+      switch (c)
+        {
+        case '\\':
+          if (backslash)
+            goto normal_char;
+          if (dfa->lex.left == 0)
+            dfaerror (_("unfinished \\ escape"));
+          backslash = true;
+          break;
+
+        case '^':
+          if (backslash)
+            goto normal_char;
+          if (dfa->syntax.syntax_bits & RE_CONTEXT_INDEP_ANCHORS
+              || dfa->lex.lasttok == END || dfa->lex.lasttok == LPAREN
+              || dfa->lex.lasttok == OR)
+            return dfa->lex.lasttok = BEGLINE;
+          goto normal_char;
+
+        case '$':
+          if (backslash)
+            goto normal_char;
+          if (dfa->syntax.syntax_bits & RE_CONTEXT_INDEP_ANCHORS
+              || dfa->lex.left == 0
+              || ((dfa->lex.left
+                   > !(dfa->syntax.syntax_bits & RE_NO_BK_PARENS))
+                  && (dfa->lex.ptr[!(dfa->syntax.syntax_bits & RE_NO_BK_PARENS)
+                                   & (dfa->lex.ptr[0] == '\\')]
+                      == ')'))
+              || ((dfa->lex.left
+                   > !(dfa->syntax.syntax_bits & RE_NO_BK_VBAR))
+                  && (dfa->lex.ptr[!(dfa->syntax.syntax_bits & RE_NO_BK_VBAR)
+                                   & (dfa->lex.ptr[0] == '\\')]
+                      == '|'))
+              || ((dfa->syntax.syntax_bits & RE_NEWLINE_ALT)
+                  && dfa->lex.left > 0 && dfa->lex.ptr[0] == '\n'))
+            return dfa->lex.lasttok = ENDLINE;
+          goto normal_char;
+
+        case '1':
+        case '2':
+        case '3':
+        case '4':
+        case '5':
+        case '6':
+        case '7':
+        case '8':
+        case '9':
+          if (backslash && !(dfa->syntax.syntax_bits & RE_NO_BK_REFS))
+            {
+              dfa->lex.laststart = false;
+              return dfa->lex.lasttok = BACKREF;
+            }
+          goto normal_char;
+
+        case '`':
+          if (backslash && !(dfa->syntax.syntax_bits & RE_NO_GNU_OPS))
+            {
+              /* FIXME: should be beginning of string */
+              return dfa->lex.lasttok = BEGLINE;
+            }
+          goto normal_char;
+
+        case '\'':
+          if (backslash && !(dfa->syntax.syntax_bits & RE_NO_GNU_OPS))
+            {
+              /* FIXME: should be end of string */
+              return dfa->lex.lasttok = ENDLINE;
+            }
+          goto normal_char;
+
+        case '<':
+          if (backslash && !(dfa->syntax.syntax_bits & RE_NO_GNU_OPS))
+            return dfa->lex.lasttok = BEGWORD;
+          goto normal_char;
+
+        case '>':
+          if (backslash && !(dfa->syntax.syntax_bits & RE_NO_GNU_OPS))
+            return dfa->lex.lasttok = ENDWORD;
+          goto normal_char;
+
+        case 'b':
+          if (backslash && !(dfa->syntax.syntax_bits & RE_NO_GNU_OPS))
+            return dfa->lex.lasttok = LIMWORD;
+          goto normal_char;
+
+        case 'B':
+          if (backslash && !(dfa->syntax.syntax_bits & RE_NO_GNU_OPS))
+            return dfa->lex.lasttok = NOTLIMWORD;
+          goto normal_char;
+
+        case '?':
+          if (dfa->syntax.syntax_bits & RE_LIMITED_OPS)
+            goto normal_char;
+          if (backslash != ((dfa->syntax.syntax_bits & RE_BK_PLUS_QM) != 0))
+            goto normal_char;
+          if (!(dfa->syntax.syntax_bits & RE_CONTEXT_INDEP_OPS)
+              && dfa->lex.laststart)
+            goto normal_char;
+          return dfa->lex.lasttok = QMARK;
+
+        case '*':
+          if (backslash)
+            goto normal_char;
+          if (!(dfa->syntax.syntax_bits & RE_CONTEXT_INDEP_OPS)
+              && dfa->lex.laststart)
+            goto normal_char;
+          return dfa->lex.lasttok = STAR;
+
+        case '+':
+          if (dfa->syntax.syntax_bits & RE_LIMITED_OPS)
+            goto normal_char;
+          if (backslash != ((dfa->syntax.syntax_bits & RE_BK_PLUS_QM) != 0))
+            goto normal_char;
+          if (!(dfa->syntax.syntax_bits & RE_CONTEXT_INDEP_OPS)
+              && dfa->lex.laststart)
+            goto normal_char;
+          return dfa->lex.lasttok = PLUS;
+
+        case '{':
+          if (!(dfa->syntax.syntax_bits & RE_INTERVALS))
+            goto normal_char;
+          if (backslash != ((dfa->syntax.syntax_bits & RE_NO_BK_BRACES) == 0))
+            goto normal_char;
+          if (!(dfa->syntax.syntax_bits & RE_CONTEXT_INDEP_OPS)
+              && dfa->lex.laststart)
+            goto normal_char;
+
+          /* Cases:
+             {M} - exact count
+             {M,} - minimum count, maximum is infinity
+             {,N} - 0 through N
+             {,} - 0 to infinity (same as '*')
+             {M,N} - M through N */
+          {
+            char const *p = dfa->lex.ptr;
+            char const *lim = p + dfa->lex.left;
+            dfa->lex.minrep = dfa->lex.maxrep = -1;
+            for (; p != lim && isasciidigit (*p); p++)
+              dfa->lex.minrep = (dfa->lex.minrep < 0
+                                 ? *p - '0'
+                                 : MIN (RE_DUP_MAX + 1,
+                                        dfa->lex.minrep * 10 + *p - '0'));
+            if (p != lim)
+              {
+                if (*p != ',')
+                  dfa->lex.maxrep = dfa->lex.minrep;
+                else
+                  {
+                    if (dfa->lex.minrep < 0)
+                      dfa->lex.minrep = 0;
+                    while (++p != lim && isasciidigit (*p))
+                      dfa->lex.maxrep
+                        = (dfa->lex.maxrep < 0
+                           ? *p - '0'
+                           : MIN (RE_DUP_MAX + 1,
+                                  dfa->lex.maxrep * 10 + *p - '0'));
+                  }
+              }
+            if (! ((! backslash || (p != lim && *p++ == '\\'))
+                   && p != lim && *p++ == '}'
+                   && 0 <= dfa->lex.minrep
+                   && (dfa->lex.maxrep < 0
+                       || dfa->lex.minrep <= dfa->lex.maxrep)))
+              {
+                if (dfa->syntax.syntax_bits & RE_INVALID_INTERVAL_ORD)
+                  goto normal_char;
+                dfaerror (_("invalid content of \\{\\}"));
+              }
+            if (RE_DUP_MAX < dfa->lex.maxrep)
+              dfaerror (_("regular expression too big"));
+            dfa->lex.ptr = p;
+            dfa->lex.left = lim - p;
+          }
+          dfa->lex.laststart = false;
+          return dfa->lex.lasttok = REPMN;
+
+        case '|':
+          if (dfa->syntax.syntax_bits & RE_LIMITED_OPS)
+            goto normal_char;
+          if (backslash != ((dfa->syntax.syntax_bits & RE_NO_BK_VBAR) == 0))
+            goto normal_char;
+          dfa->lex.laststart = true;
+          return dfa->lex.lasttok = OR;
+
+        case '\n':
+          if (dfa->syntax.syntax_bits & RE_LIMITED_OPS
+              || backslash || !(dfa->syntax.syntax_bits & RE_NEWLINE_ALT))
+            goto normal_char;
+          dfa->lex.laststart = true;
+          return dfa->lex.lasttok = OR;
+
+        case '(':
+          if (backslash != ((dfa->syntax.syntax_bits & RE_NO_BK_PARENS) == 0))
+            goto normal_char;
+          dfa->lex.parens++;
+          dfa->lex.laststart = true;
+          return dfa->lex.lasttok = LPAREN;
+
+        case ')':
+          if (backslash != ((dfa->syntax.syntax_bits & RE_NO_BK_PARENS) == 0))
+            goto normal_char;
+          if (dfa->lex.parens == 0
+              && dfa->syntax.syntax_bits & RE_UNMATCHED_RIGHT_PAREN_ORD)
+            goto normal_char;
+          dfa->lex.parens--;
+          dfa->lex.laststart = false;
+          return dfa->lex.lasttok = RPAREN;
+
+        case '.':
+          if (backslash)
+            goto normal_char;
+          if (dfa->canychar < 0)
+            {
+              charclass ccl;
+              fillset (&ccl);
+              if (!(dfa->syntax.syntax_bits & RE_DOT_NEWLINE))
+                clrbit ('\n', &ccl);
+              if (dfa->syntax.syntax_bits & RE_DOT_NOT_NULL)
+                clrbit ('\0', &ccl);
+              if (dfa->localeinfo.multibyte)
+                for (int c2 = 0; c2 < NOTCHAR; c2++)
+                  if (dfa->localeinfo.sbctowc[c2] == WEOF)
+                    clrbit (c2, &ccl);
+              dfa->canychar = charclass_index (dfa, &ccl);
+            }
+          dfa->lex.laststart = false;
+          return dfa->lex.lasttok = (dfa->localeinfo.multibyte
+                                     ? ANYCHAR
+                                     : CSET + dfa->canychar);
+
+        case 's':
+        case 'S':
+          if (!backslash || (dfa->syntax.syntax_bits & RE_NO_GNU_OPS))
+            goto normal_char;
+          if (!dfa->localeinfo.multibyte)
+            {
+              charclass ccl;
+              zeroset (&ccl);
+              for (int c2 = 0; c2 < NOTCHAR; ++c2)
+                if (isspace (c2))
+                  setbit (c2, &ccl);
+              if (c == 'S')
+                notset (&ccl);
+              dfa->lex.laststart = false;
+              return dfa->lex.lasttok = CSET + charclass_index (dfa, &ccl);
+            }
+
+          /* FIXME: see if optimizing this, as is done with ANYCHAR and
+             add_utf8_anychar, makes sense.  */
+
+          /* \s and \S are documented to be equivalent to [[:space:]] and
+             [^[:space:]] respectively, so tell the lexer to process those
+             strings, each minus its "already processed" '['.  */
+          {
+            struct lexptr ls;
+            push_lex_state (dfa, &ls, &"^[:space:]]"[c == 's']);
+            dfa->lex.lasttok = parse_bracket_exp (dfa);
+            pop_lex_state (dfa, &ls);
+          }
+
+          dfa->lex.laststart = false;
+          return dfa->lex.lasttok;
+
+        case 'w':
+        case 'W':
+          if (!backslash || (dfa->syntax.syntax_bits & RE_NO_GNU_OPS))
+            goto normal_char;
+
+          if (!dfa->localeinfo.multibyte)
+            {
+              charclass ccl;
+              zeroset (&ccl);
+              for (int c2 = 0; c2 < NOTCHAR; ++c2)
+                if (dfa->syntax.sbit[c2] == CTX_LETTER)
+                  setbit (c2, &ccl);
+              if (c == 'W')
+                notset (&ccl);
+              dfa->lex.laststart = false;
+              return dfa->lex.lasttok = CSET + charclass_index (dfa, &ccl);
+            }
+
+          /* FIXME: see if optimizing this, as is done with ANYCHAR and
+             add_utf8_anychar, makes sense.  */
+
+          /* \w and \W are documented to be equivalent to [_[:alnum:]] and
+             [^_[:alnum:]] respectively, so tell the lexer to process those
+             strings, each minus its "already processed" '['.  */
+          {
+            struct lexptr ls;
+            push_lex_state (dfa, &ls, &"^_[:alnum:]]"[c == 'w']);
+            dfa->lex.lasttok = parse_bracket_exp (dfa);
+            pop_lex_state (dfa, &ls);
+          }
+
+          dfa->lex.laststart = false;
+          return dfa->lex.lasttok;
+
+        case '[':
+          if (backslash)
+            goto normal_char;
+          dfa->lex.laststart = false;
+          return dfa->lex.lasttok = parse_bracket_exp (dfa);
+
+        default:
+        normal_char:
+          dfa->lex.laststart = false;
+          /* For multibyte character sets, folding is done in atom.  Always
+             return WCHAR.  */
+          if (dfa->localeinfo.multibyte)
+            return dfa->lex.lasttok = WCHAR;
+
+          if (dfa->syntax.case_fold && isalpha (c))
+            {
+              charclass ccl;
+              zeroset (&ccl);
+              setbit_case_fold_c (c, &ccl);
+              return dfa->lex.lasttok = CSET + charclass_index (dfa, &ccl);
+            }
+
+          return dfa->lex.lasttok = c;
+        }
+    }
+
+  /* The above loop should consume at most a backslash
+     and some other character.  */
+  abort ();
+  return END;                   /* keeps pedantic compilers happy.  */
+}
+
+static void
+addtok_mb (struct dfa *dfa, token t, char mbprop)
+{
+  if (dfa->talloc == dfa->tindex)
+    {
+      dfa->tokens = xpalloc (dfa->tokens, &dfa->talloc, 1, -1,
+                             sizeof *dfa->tokens);
+      if (dfa->localeinfo.multibyte)
+        dfa->multibyte_prop = xreallocarray (dfa->multibyte_prop, dfa->talloc,
+                                             sizeof *dfa->multibyte_prop);
+    }
+  if (dfa->localeinfo.multibyte)
+    dfa->multibyte_prop[dfa->tindex] = mbprop;
+  dfa->tokens[dfa->tindex++] = t;
+
+  switch (t)
+    {
+    case QMARK:
+    case STAR:
+    case PLUS:
+      break;
+
+    case CAT:
+    case OR:
+      dfa->parse.depth--;
+      break;
+
+    case EMPTY:
+      dfa->epsilon = true;
+      goto increment_depth;
+
+    case BACKREF:
+      dfa->fast = false;
+      goto increment_nleaves;
+
+    case BEGLINE:
+    case ENDLINE:
+    case BEGWORD:
+    case ENDWORD:
+    case LIMWORD:
+    case NOTLIMWORD:
+      dfa->epsilon = true;
+      FALLTHROUGH;
+    default:
+    increment_nleaves:
+      dfa->nleaves++;
+    increment_depth:
+      dfa->parse.depth++;
+      if (dfa->depth < dfa->parse.depth)
+        dfa->depth = dfa->parse.depth;
+      break;
+    }
+}
+
+static void addtok_wc (struct dfa *dfa, wint_t wc);
+
+/* Add the given token to the parse tree, maintaining the depth count and
+   updating the maximum depth if necessary.  */
+static void
+addtok (struct dfa *dfa, token t)
+{
+  if (dfa->localeinfo.multibyte && t == MBCSET)
+    {
+      bool need_or = false;
+
+      /* Extract wide characters into alternations for better performance.
+         This does not require UTF-8.  */
+      for (idx_t i = 0; i < dfa->lex.brack.nchars; i++)
+        {
+          addtok_wc (dfa, dfa->lex.brack.chars[i]);
+          if (need_or)
+            addtok (dfa, OR);
+          need_or = true;
+        }
+      dfa->lex.brack.nchars = 0;
+
+      /* Wide characters have been handled above, so it is possible
+         that the set is empty now.  Do nothing in that case.  */
+      if (dfa->lex.brack.cset != -1)
+        {
+          addtok (dfa, CSET + dfa->lex.brack.cset);
+          if (need_or)
+            addtok (dfa, OR);
+        }
+    }
+  else
+    {
+      addtok_mb (dfa, t, 3);
+    }
+}
+
+/* We treat a multibyte character as a single atom, so that DFA
+   can treat a multibyte character as a single expression.
+
+   e.g., we construct the following tree from "<mb1><mb2>".
+   <mb1(1st-byte)><mb1(2nd-byte)><CAT><mb1(3rd-byte)><CAT>
+   <mb2(1st-byte)><mb2(2nd-byte)><CAT><mb2(3rd-byte)><CAT><CAT> */
+static void
+addtok_wc (struct dfa *dfa, wint_t wc)
+{
+  unsigned char buf[MB_LEN_MAX];
+  mbstate_t s = { 0 };
+  size_t stored_bytes = wcrtomb ((char *) buf, wc, &s);
+  int buflen;
+
+  if (stored_bytes != (size_t) -1)
+    buflen = stored_bytes;
+  else
+    {
+      /* This is merely stop-gap.  buf[0] is undefined, yet skipping
+         the addtok_mb call altogether can corrupt the heap.  */
+      buflen = 1;
+      buf[0] = 0;
+    }
+
+  addtok_mb (dfa, buf[0], buflen == 1 ? 3 : 1);
+  for (int i = 1; i < buflen; i++)
+    {
+      addtok_mb (dfa, buf[i], i == buflen - 1 ? 2 : 0);
+      addtok (dfa, CAT);
+    }
+}
+
+static void
+add_utf8_anychar (struct dfa *dfa)
+{
+  /* Since the Unicode Standard Version 4.0.0 (2003), a well-formed
+     UTF-8 byte sequence has been defined as follows:
+
+     ([\x00-\x7f]
+     |[\xc2-\xdf][\x80-\xbf]
+     |[\xe0][\xa0-\xbf][\x80-\xbf]
+     |[\xe1-\xec\xee-\xef][\x80-\xbf][\x80-\xbf]
+     |[\xed][\x80-\x9f][\x80-\xbf]
+     |[\xf0][\x90-\xbf][\x80-\xbf][\x80-\xbf])
+     |[\xf1-\xf3][\x80-\xbf][\x80-\xbf][\x80-\xbf]
+     |[\xf4][\x80-\x8f][\x80-\xbf][\x80-\xbf])
+
+     which I'll write more concisely "A|BC|DEC|FCC|GHC|IJCC|KCCC|LMCC",
+     where A = [\x00-\x7f], B = [\xc2-\xdf], C = [\x80-\xbf],
+     D = [\xe0], E = [\xa0-\xbf], F = [\xe1-\xec\xee-\xef], G = [\xed],
+     H = [\x80-\x9f], I = [\xf0],
+     J = [\x90-\xbf], K = [\xf1-\xf3], L = [\xf4], M = [\x80-\x8f].
+
+     This can be refactored to "A|(B|DE|GH|(F|IJ|LM|KC)C)C".  */
+
+  /* Mnemonics for classes containing two or more bytes.  */
+  enum { A, B, C, E, F, H, J, K, M };
+
+  /* Mnemonics for single-byte tokens.  */
+  enum { D_token = 0xe0, G_token = 0xed, I_token = 0xf0, L_token = 0xf4 };
+
+  static charclass const utf8_classes[] = {
+    /* A. 00-7f: 1-byte sequence.  */
+    CHARCLASS_INIT (0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0, 0, 0, 0),
+
+    /* B. c2-df: 1st byte of a 2-byte sequence.  */
+    CHARCLASS_INIT (0, 0, 0, 0, 0, 0, 0xfffffffc, 0),
+
+    /* C. 80-bf: non-leading bytes.  */
+    CHARCLASS_INIT (0, 0, 0, 0, 0xffffffff, 0xffffffff, 0, 0),
+
+    /* D. e0 (just a token).  */
+
+    /* E. a0-bf: 2nd byte of a "DEC" sequence.  */
+    CHARCLASS_INIT (0, 0, 0, 0, 0, 0xffffffff, 0, 0),
+
+    /* F. e1-ec + ee-ef: 1st byte of an "FCC" sequence.  */
+    CHARCLASS_INIT (0, 0, 0, 0, 0, 0, 0, 0xdffe),
+
+    /* G. ed (just a token).  */
+
+    /* H. 80-9f: 2nd byte of a "GHC" sequence.  */
+    CHARCLASS_INIT (0, 0, 0, 0, 0xffff, 0, 0, 0),
+
+    /* I. f0 (just a token).  */
+
+    /* J. 90-bf: 2nd byte of an "IJCC" sequence.  */
+    CHARCLASS_INIT (0, 0, 0, 0, 0xffff0000, 0xffffffff, 0, 0),
+
+    /* K. f1-f3: 1st byte of a "KCCC" sequence.  */
+    CHARCLASS_INIT (0, 0, 0, 0, 0, 0, 0, 0xe0000),
+
+    /* L. f4 (just a token).  */
+
+    /* M. 80-8f: 2nd byte of a "LMCC" sequence.  */
+    CHARCLASS_INIT (0, 0, 0, 0, 0xff, 0, 0, 0),
+  };
+
+  /* Define the character classes that are needed below.  */
+  if (dfa->utf8_anychar_classes[0] == 0)
+    {
+      charclass c = utf8_classes[0];
+      if (! (dfa->syntax.syntax_bits & RE_DOT_NEWLINE))
+        clrbit ('\n', &c);
+      if (dfa->syntax.syntax_bits & RE_DOT_NOT_NULL)
+        clrbit ('\0', &c);
+      dfa->utf8_anychar_classes[0] = CSET + charclass_index (dfa, &c);
+
+      for (int i = 1; i < sizeof utf8_classes / sizeof *utf8_classes; i++)
+        dfa->utf8_anychar_classes[i]
+          = CSET + charclass_index (dfa, &utf8_classes[i]);
+    }
+
+  /* Implement the "A|(B|DE|GH|(F|IJ|LM|KC)C)C" pattern mentioned above.
+     The token buffer is in reverse Polish order, so we get
+     "A B D E CAT OR G H CAT OR F I J CAT OR L M CAT OR K
+      C CAT OR C CAT OR C CAT OR".  */
+  addtok (dfa, dfa->utf8_anychar_classes[A]);
+  addtok (dfa, dfa->utf8_anychar_classes[B]);
+  addtok (dfa, D_token);
+  addtok (dfa, dfa->utf8_anychar_classes[E]);
+  addtok (dfa, CAT);
+  addtok (dfa, OR);
+  addtok (dfa, G_token);
+  addtok (dfa, dfa->utf8_anychar_classes[H]);
+  addtok (dfa, CAT);
+  addtok (dfa, OR);
+  addtok (dfa, dfa->utf8_anychar_classes[F]);
+  addtok (dfa, I_token);
+  addtok (dfa, dfa->utf8_anychar_classes[J]);
+  addtok (dfa, CAT);
+  addtok (dfa, OR);
+  addtok (dfa, L_token);
+  addtok (dfa, dfa->utf8_anychar_classes[M]);
+  addtok (dfa, CAT);
+  addtok (dfa, OR);
+  addtok (dfa, dfa->utf8_anychar_classes[K]);
+  for (int i = 0; i < 3; i++)
+    {
+      addtok (dfa, dfa->utf8_anychar_classes[C]);
+      addtok (dfa, CAT);
+      addtok (dfa, OR);
+    }
+}
+
+/* The grammar understood by the parser is as follows.
+
+   regexp:
+     regexp OR branch
+     branch
+
+   branch:
+     branch closure
+     closure
+
+   closure:
+     closure QMARK
+     closure STAR
+     closure PLUS
+     closure REPMN
+     atom
+
+   atom:
+     <normal character>
+     <multibyte character>
+     ANYCHAR
+     MBCSET
+     CSET
+     BACKREF
+     BEGLINE
+     ENDLINE
+     BEGWORD
+     ENDWORD
+     LIMWORD
+     NOTLIMWORD
+     LPAREN regexp RPAREN
+     <empty>
+
+   The parser builds a parse tree in postfix form in an array of tokens.  */
+
+static void
+atom (struct dfa *dfa)
+{
+  if ((0 <= dfa->parse.tok && dfa->parse.tok < NOTCHAR)
+      || dfa->parse.tok >= CSET
+      || dfa->parse.tok == BEG || dfa->parse.tok == BACKREF
+      || dfa->parse.tok == BEGLINE || dfa->parse.tok == ENDLINE
+      || dfa->parse.tok == BEGWORD || dfa->parse.tok == ENDWORD
+      || dfa->parse.tok == LIMWORD || dfa->parse.tok == NOTLIMWORD
+      || dfa->parse.tok == ANYCHAR || dfa->parse.tok == MBCSET)
+    {
+      if (dfa->parse.tok == ANYCHAR && dfa->localeinfo.using_utf8)
+        {
+          /* For UTF-8 expand the period to a series of CSETs that define a
+             valid UTF-8 character.  This avoids using the slow multibyte
+             path.  I'm pretty sure it would be both profitable and correct to
+             do it for any encoding; however, the optimization must be done
+             manually as it is done above in add_utf8_anychar.  So, let's
+             start with UTF-8: it is the most used, and the structure of the
+             encoding makes the correctness more obvious.  */
+          add_utf8_anychar (dfa);
+        }
+      else
+        addtok (dfa, dfa->parse.tok);
+      dfa->parse.tok = lex (dfa);
+    }
+  else if (dfa->parse.tok == WCHAR)
+    {
+      if (dfa->lex.wctok == WEOF)
+        addtok (dfa, BACKREF);
+      else
+        {
+          addtok_wc (dfa, dfa->lex.wctok);
+
+          if (dfa->syntax.case_fold)
+            {
+              wchar_t folded[CASE_FOLDED_BUFSIZE];
+              int n = case_folded_counterparts (dfa->lex.wctok, folded);
+              for (int i = 0; i < n; i++)
+                {
+                  addtok_wc (dfa, folded[i]);
+                  addtok (dfa, OR);
+                }
+            }
+        }
+
+      dfa->parse.tok = lex (dfa);
+    }
+  else if (dfa->parse.tok == LPAREN)
+    {
+      dfa->parse.tok = lex (dfa);
+      regexp (dfa);
+      if (dfa->parse.tok != RPAREN)
+        dfaerror (_("unbalanced ("));
+      dfa->parse.tok = lex (dfa);
+    }
+  else
+    addtok (dfa, EMPTY);
+}
+
+/* Return the number of tokens in the given subexpression.  */
+static idx_t _GL_ATTRIBUTE_PURE
+nsubtoks (struct dfa const *dfa, idx_t tindex)
+{
+  switch (dfa->tokens[tindex - 1])
+    {
+    default:
+      return 1;
+    case QMARK:
+    case STAR:
+    case PLUS:
+      return 1 + nsubtoks (dfa, tindex - 1);
+    case CAT:
+    case OR:
+      {
+        idx_t ntoks1 = nsubtoks (dfa, tindex - 1);
+        return 1 + ntoks1 + nsubtoks (dfa, tindex - 1 - ntoks1);
+      }
+    }
+}
+
+/* Copy the given subexpression to the top of the tree.  */
+static void
+copytoks (struct dfa *dfa, idx_t tindex, idx_t ntokens)
+{
+  if (dfa->localeinfo.multibyte)
+    for (idx_t i = 0; i < ntokens; i++)
+      addtok_mb (dfa, dfa->tokens[tindex + i],
+                 dfa->multibyte_prop[tindex + i]);
+  else
+    for (idx_t i = 0; i < ntokens; i++)
+      addtok_mb (dfa, dfa->tokens[tindex + i], 3);
+}
+
+static void
+closure (struct dfa *dfa)
+{
+  atom (dfa);
+  while (dfa->parse.tok == QMARK || dfa->parse.tok == STAR
+         || dfa->parse.tok == PLUS || dfa->parse.tok == REPMN)
+    if (dfa->parse.tok == REPMN && (dfa->lex.minrep || dfa->lex.maxrep))
+      {
+        idx_t ntokens = nsubtoks (dfa, dfa->tindex);
+        idx_t tindex = dfa->tindex - ntokens;
+        if (dfa->lex.maxrep < 0)
+          addtok (dfa, PLUS);
+        if (dfa->lex.minrep == 0)
+          addtok (dfa, QMARK);
+        int i;
+        for (i = 1; i < dfa->lex.minrep; i++)
+          {
+            copytoks (dfa, tindex, ntokens);
+            addtok (dfa, CAT);
+          }
+        for (; i < dfa->lex.maxrep; i++)
+          {
+            copytoks (dfa, tindex, ntokens);
+            addtok (dfa, QMARK);
+            addtok (dfa, CAT);
+          }
+        dfa->parse.tok = lex (dfa);
+      }
+    else if (dfa->parse.tok == REPMN)
+      {
+        dfa->tindex -= nsubtoks (dfa, dfa->tindex);
+        dfa->parse.tok = lex (dfa);
+        closure (dfa);
+      }
+    else
+      {
+        addtok (dfa, dfa->parse.tok);
+        dfa->parse.tok = lex (dfa);
+      }
+}
+
+static void
+branch (struct dfa* dfa)
+{
+  closure (dfa);
+  while (dfa->parse.tok != RPAREN && dfa->parse.tok != OR
+         && dfa->parse.tok >= 0)
+    {
+      closure (dfa);
+      addtok (dfa, CAT);
+    }
+}
+
+static void
+regexp (struct dfa *dfa)
+{
+  branch (dfa);
+  while (dfa->parse.tok == OR)
+    {
+      dfa->parse.tok = lex (dfa);
+      branch (dfa);
+      addtok (dfa, OR);
+    }
+}
+
+/* Parse a string S of length LEN into D.  S can include NUL characters.
+   This is the main entry point for the parser.  */
+void
+dfaparse (char const *s, idx_t len, struct dfa *d)
+{
+  d->lex.ptr = s;
+  d->lex.left = len;
+  d->lex.lasttok = END;
+  d->lex.laststart = true;
+
+  if (!d->syntax.syntax_bits_set)
+    dfaerror (_("no syntax specified"));
+
+  if (!d->nregexps)
+    addtok (d, BEG);
+
+  d->parse.tok = lex (d);
+  d->parse.depth = d->depth;
+
+  regexp (d);
+
+  if (d->parse.tok != END)
+    dfaerror (_("unbalanced )"));
+
+  addtok (d, END - d->nregexps);
+  addtok (d, CAT);
+
+  if (d->nregexps)
+    addtok (d, OR);
+
+  ++d->nregexps;
+}
+
+/* Some primitives for operating on sets of positions.  */
+
+/* Copy one set to another.  */
+static void
+copy (position_set const *src, position_set *dst)
+{
+  if (dst->alloc < src->nelem)
+    {
+      free (dst->elems);
+      dst->elems = xpalloc (NULL, &dst->alloc, src->nelem - dst->alloc, -1,
+                            sizeof *dst->elems);
+    }
+  dst->nelem = src->nelem;
+  if (src->nelem != 0)
+    memcpy (dst->elems, src->elems, src->nelem * sizeof *dst->elems);
+}
+
+static void
+alloc_position_set (position_set *s, idx_t size)
+{
+  s->elems = xnmalloc (size, sizeof *s->elems);
+  s->alloc = size;
+  s->nelem = 0;
+}
+
+/* Insert position P in set S.  S is maintained in sorted order on
+   decreasing index.  If there is already an entry in S with P.index
+   then merge (logically-OR) P's constraints into the one in S.
+   S->elems must point to an array large enough to hold the resulting set.  */
+static void
+insert (position p, position_set *s)
+{
+  idx_t count = s->nelem;
+  idx_t lo = 0, hi = count;
+  while (lo < hi)
+    {
+      idx_t mid = (lo + hi) >> 1;
+      if (s->elems[mid].index < p.index)
+        lo = mid + 1;
+      else if (s->elems[mid].index == p.index)
+        {
+          s->elems[mid].constraint |= p.constraint;
+          return;
+        }
+      else
+        hi = mid;
+    }
+
+  s->elems = maybe_realloc (s->elems, count, &s->alloc, -1, sizeof *s->elems);
+  for (idx_t i = count; i > lo; i--)
+    s->elems[i] = s->elems[i - 1];
+  s->elems[lo] = p;
+  ++s->nelem;
+}
+
+static void
+append (position p, position_set *s)
+{
+  idx_t count = s->nelem;
+  s->elems = maybe_realloc (s->elems, count, &s->alloc, -1, sizeof *s->elems);
+  s->elems[s->nelem++] = p;
+}
+
+/* Merge S1 and S2 (with the additional constraint C2) into M.  The
+   result is as if the positions of S1, and of S2 with the additional
+   constraint C2, were inserted into an initially empty set.  */
+static void
+merge_constrained (position_set const *s1, position_set const *s2,
+                   unsigned int c2, position_set *m)
+{
+  idx_t i = 0, j = 0;
+
+  if (m->alloc - s1->nelem < s2->nelem)
+    {
+      free (m->elems);
+      m->alloc = s1->nelem;
+      m->elems = xpalloc (NULL, &m->alloc, s2->nelem, -1, sizeof *m->elems);
+    }
+  m->nelem = 0;
+  while (i < s1->nelem || j < s2->nelem)
+    if (! (j < s2->nelem)
+        || (i < s1->nelem && s1->elems[i].index <= s2->elems[j].index))
+      {
+        unsigned int c = ((i < s1->nelem && j < s2->nelem
+                           && s1->elems[i].index == s2->elems[j].index)
+                          ? s2->elems[j++].constraint & c2
+                          : 0);
+        m->elems[m->nelem].index = s1->elems[i].index;
+        m->elems[m->nelem++].constraint = s1->elems[i++].constraint | c;
+      }
+    else
+      {
+        if (s2->elems[j].constraint & c2)
+          {
+            m->elems[m->nelem].index = s2->elems[j].index;
+            m->elems[m->nelem++].constraint = s2->elems[j].constraint & c2;
+          }
+        j++;
+      }
+}
+
+/* Merge two sets of positions into a third.  The result is exactly as if
+   the positions of both sets were inserted into an initially empty set.  */
+static void
+merge (position_set const *s1, position_set const *s2, position_set *m)
+{
+  merge_constrained (s1, s2, -1, m);
+}
+
+/* Merge into DST all the elements of SRC, possibly destroying
+   the contents of the temporary M.  */
+static void
+merge2 (position_set *dst, position_set const *src, position_set *m)
+{
+  if (src->nelem < 4)
+    {
+      for (idx_t i = 0; i < src->nelem; i++)
+        insert (src->elems[i], dst);
+    }
+   else
+    {
+      merge (src, dst, m);
+      copy (m, dst);
+    }
+}
+
+/* Delete a position from a set.  Return the nonzero constraint of the
+   deleted position, or zero if there was no such position.  */
+static unsigned int
+delete (idx_t del, position_set *s)
+{
+  idx_t count = s->nelem;
+  idx_t lo = 0, hi = count;
+  while (lo < hi)
+    {
+      idx_t mid = (lo + hi) >> 1;
+      if (s->elems[mid].index < del)
+        lo = mid + 1;
+      else if (s->elems[mid].index == del)
+        {
+          unsigned int c = s->elems[mid].constraint;
+          idx_t i;
+          for (i = mid; i + 1 < count; i++)
+            s->elems[i] = s->elems[i + 1];
+          s->nelem = i;
+          return c;
+        }
+      else
+        hi = mid;
+    }
+  return 0;
+}
+
+/* Replace a position with the followed set.  */
+static void
+replace (position_set *dst, idx_t del, position_set *add,
+         unsigned int constraint, position_set *tmp)
+{
+  unsigned int c = delete (del, dst) & constraint;
+
+  if (c)
+    {
+      copy (dst, tmp);
+      merge_constrained (tmp, add, c, dst);
+    }
+}
+
+/* Find the index of the state corresponding to the given position set with
+   the given preceding context, or create a new state if there is no such
+   state.  Context tells whether we got here on a newline or letter.  */
+static state_num
+state_index (struct dfa *d, position_set const *s, int context)
+{
+  size_t hash = 0;
+  int constraint = 0;
+  state_num i;
+
+  for (i = 0; i < s->nelem; ++i)
+    {
+      idx_t ind = s->elems[i].index;
+      hash ^= ind + s->elems[i].constraint;
+    }
+
+  /* Try to find a state that exactly matches the proposed one.  */
+  for (i = 0; i < d->sindex; ++i)
+    {
+      if (hash != d->states[i].hash || s->nelem != d->states[i].elems.nelem
+          || context != d->states[i].context)
+        continue;
+      state_num j;
+      for (j = 0; j < s->nelem; ++j)
+        if (s->elems[j].constraint != d->states[i].elems.elems[j].constraint
+            || s->elems[j].index != d->states[i].elems.elems[j].index)
+          break;
+      if (j == s->nelem)
+        return i;
+    }
+
+#ifdef DEBUG
+  fprintf (stderr, "new state %td\n nextpos:", i);
+  for (state_num j = 0; j < s->nelem; j++)
+    {
+      fprintf (stderr, " %td:", s->elems[j].index);
+      prtok (d->tokens[s->elems[j].index]);
+    }
+  fprintf (stderr, "\n context:");
+  if (context ^ CTX_ANY)
+    {
+      if (context & CTX_NONE)
+        fprintf (stderr, " CTX_NONE");
+      if (context & CTX_LETTER)
+        fprintf (stderr, " CTX_LETTER");
+      if (context & CTX_NEWLINE)
+        fprintf (stderr, " CTX_NEWLINE");
+    }
+  else
+    fprintf (stderr, " CTX_ANY");
+  fprintf (stderr, "\n");
+#endif
+
+  for (state_num j = 0; j < s->nelem; j++)
+    {
+      int c = d->constraints[s->elems[j].index];
+
+      if (c != 0)
+        {
+          if (succeeds_in_context (c, context, CTX_ANY))
+            constraint |= c;
+        }
+      else if (d->tokens[s->elems[j].index] == BACKREF)
+        constraint = NO_CONSTRAINT;
+    }
+
+
+  /* Create a new state.  */
+  d->states = maybe_realloc (d->states, d->sindex, &d->salloc, -1,
+                             sizeof *d->states);
+  d->states[i].hash = hash;
+  alloc_position_set (&d->states[i].elems, s->nelem);
+  copy (s, &d->states[i].elems);
+  d->states[i].context = context;
+  d->states[i].constraint = constraint;
+  d->states[i].mbps.nelem = 0;
+  d->states[i].mbps.elems = NULL;
+  d->states[i].mb_trindex = -1;
+
+  ++d->sindex;
+
+  return i;
+}
+
+/* Find the epsilon closure of D's set of positions.  If any position of the set
+   contains a symbol that matches the empty string in some context, replace
+   that position with the elements of its follow labeled with an appropriate
+   constraint.  Repeat exhaustively until no funny positions are left.
+   S->elems must be large enough to hold the result.  BACKWARD is D's
+   backward set; use and update it too.  */
+static void
+epsclosure (struct dfa const *d, position_set *backward)
+{
+  position_set tmp;
+  alloc_position_set (&tmp, d->nleaves);
+  for (idx_t i = 0; i < d->tindex; i++)
+    if (0 < d->follows[i].nelem)
+      {
+        unsigned int constraint;
+        switch (d->tokens[i])
+          {
+          default:
+            continue;
+
+          case BEGLINE:
+            constraint = BEGLINE_CONSTRAINT;
+            break;
+          case ENDLINE:
+            constraint = ENDLINE_CONSTRAINT;
+            break;
+          case BEGWORD:
+            constraint = BEGWORD_CONSTRAINT;
+            break;
+          case ENDWORD:
+            constraint = ENDWORD_CONSTRAINT;
+            break;
+          case LIMWORD:
+            constraint = LIMWORD_CONSTRAINT;
+            break;
+          case NOTLIMWORD:
+            constraint = NOTLIMWORD_CONSTRAINT;
+            break;
+          case EMPTY:
+            constraint = NO_CONSTRAINT;
+            break;
+          }
+
+        delete (i, &d->follows[i]);
+
+        for (idx_t j = 0; j < backward[i].nelem; j++)
+          replace (&d->follows[backward[i].elems[j].index], i, &d->follows[i],
+                   constraint, &tmp);
+        for (idx_t j = 0; j < d->follows[i].nelem; j++)
+          replace (&backward[d->follows[i].elems[j].index], i, &backward[i],
+                   NO_CONSTRAINT, &tmp);
+      }
+  free (tmp.elems);
+}
+
+/* Returns the set of contexts for which there is at least one
+   character included in C.  */
+
+static int
+charclass_context (struct dfa const *dfa, charclass const *c)
+{
+  int context = 0;
+
+  for (int j = 0; j < CHARCLASS_WORDS; j++)
+    {
+      if (c->w[j] & dfa->syntax.newline.w[j])
+        context |= CTX_NEWLINE;
+      if (c->w[j] & dfa->syntax.letters.w[j])
+        context |= CTX_LETTER;
+      if (c->w[j] & ~(dfa->syntax.letters.w[j] | dfa->syntax.newline.w[j]))
+        context |= CTX_NONE;
+    }
+
+  return context;
+}
+
+/* Returns the contexts on which the position set S depends.  Each context
+   in the set of returned contexts (let's call it SC) may have a different
+   follow set than other contexts in SC, and also different from the
+   follow set of the complement set (sc ^ CTX_ANY).  However, all contexts
+   in the complement set will have the same follow set.  */
+
+static int _GL_ATTRIBUTE_PURE
+state_separate_contexts (struct dfa *d, position_set const *s)
+{
+  int separate_contexts = 0;
+
+  for (idx_t j = 0; j < s->nelem; j++)
+    separate_contexts |= d->separates[s->elems[j].index];
+
+  return separate_contexts;
+}
+
+enum
+{
+  /* Single token is repeated.  It is distinguished from non-repeated.  */
+  OPT_REPEAT = (1 << 0),
+
+  /* Multiple tokens are repeated.  This flag is on at head of tokens.  The
+     node is not merged.  */
+  OPT_LPAREN = (1 << 1),
+
+  /* Multiple branches are joined.  The node is not merged.  */
+  OPT_RPAREN = (1 << 2),
+
+  /* The node is walked.  If the node is found in walking again, OPT_RPAREN
+     flag is turned on. */
+  OPT_WALKED = (1 << 3),
+
+  /* The node is queued.  The node is not queued again.  */
+  OPT_QUEUED = (1 << 4)
+};
+
+static void
+merge_nfa_state (struct dfa *d, idx_t tindex, char *flags,
+                 position_set *merged)
+{
+  position_set *follows = d->follows;
+  idx_t nelem = 0;
+
+  for (idx_t i = 0; i < follows[tindex].nelem; i++)
+    {
+      idx_t sindex = follows[tindex].elems[i].index;
+
+      /* Skip the node as pruned in future.  */
+      unsigned int iconstraint = follows[tindex].elems[i].constraint;
+      if (iconstraint == 0)
+        continue;
+
+      if (d->tokens[follows[tindex].elems[i].index] <= END)
+        {
+          d->constraints[tindex] |= follows[tindex].elems[i].constraint;
+          continue;
+        }
+
+      if (sindex != tindex && !(flags[sindex] & (OPT_LPAREN | OPT_RPAREN)))
+        {
+          idx_t j;
+
+          for (j = 0; j < nelem; j++)
+            {
+              idx_t dindex = follows[tindex].elems[j].index;
+
+              if (dindex == tindex)
+                continue;
+
+              if (follows[tindex].elems[j].constraint != iconstraint)
+                continue;
+
+              if (flags[dindex] & (OPT_LPAREN | OPT_RPAREN))
+                continue;
+
+              if (d->tokens[sindex] != d->tokens[dindex])
+                continue;
+
+              if ((flags[sindex] ^ flags[dindex]) & OPT_REPEAT)
+                continue;
+
+              if (flags[sindex] & OPT_REPEAT)
+                delete (sindex, &follows[sindex]);
+
+              merge2 (&follows[dindex], &follows[sindex], merged);
+
+              break;
+            }
+
+          if (j < nelem)
+            continue;
+        }
+
+      follows[tindex].elems[nelem++] = follows[tindex].elems[i];
+      flags[sindex] |= OPT_QUEUED;
+    }
+
+  follows[tindex].nelem = nelem;
+}
+
+static int
+compare (const void *a, const void *b)
+{
+  position const *p = a, *q = b;
+  return (p->index > q->index) - (p->index < q->index);
+}
+
+static void
+reorder_tokens (struct dfa *d)
+{
+  idx_t nleaves = 0;
+  ptrdiff_t *map = xnmalloc (d->tindex, sizeof *map);
+  map[0] = nleaves++;
+  for (idx_t i = 1; i < d->tindex; i++)
+    map[i] = -1;
+
+  token *tokens = xnmalloc (d->nleaves, sizeof *tokens);
+  position_set *follows = xnmalloc (d->nleaves, sizeof *follows);
+  int *constraints = xnmalloc (d->nleaves, sizeof *constraints);
+  char *multibyte_prop = (d->localeinfo.multibyte
+                          ? xnmalloc (d->nleaves, sizeof *multibyte_prop)
+                          : NULL);
+
+  for (idx_t i = 0; i < d->tindex; i++)
+    {
+      if (map[i] < 0)
+        {
+          free (d->follows[i].elems);
+          d->follows[i].elems = NULL;
+          d->follows[i].nelem = 0;
+          continue;
+        }
+
+      tokens[map[i]] = d->tokens[i];
+      follows[map[i]] = d->follows[i];
+      constraints[map[i]] = d->constraints[i];
+
+      if (multibyte_prop != NULL)
+        multibyte_prop[map[i]] = d->multibyte_prop[i];
+
+      for (idx_t j = 0; j < d->follows[i].nelem; j++)
+        {
+          if (map[d->follows[i].elems[j].index] == -1)
+            map[d->follows[i].elems[j].index] = nleaves++;
+
+          d->follows[i].elems[j].index = map[d->follows[i].elems[j].index];
+        }
+
+      qsort (d->follows[i].elems, d->follows[i].nelem,
+             sizeof *d->follows[i].elems, compare);
+    }
+
+  for (idx_t i = 0; i < nleaves; i++)
+    {
+      d->tokens[i] = tokens[i];
+      d->follows[i] = follows[i];
+      d->constraints[i] = constraints[i];
+
+      if (multibyte_prop != NULL)
+        d->multibyte_prop[i] = multibyte_prop[i];
+    }
+
+  d->tindex = d->nleaves = nleaves;
+
+  free (tokens);
+  free (follows);
+  free (constraints);
+  free (multibyte_prop);
+  free (map);
+}
+
+static void
+dfaoptimize (struct dfa *d)
+{
+  char *flags = xizalloc (d->tindex);
+
+  for (idx_t i = 0; i < d->tindex; i++)
+    {
+      for (idx_t j = 0; j < d->follows[i].nelem; j++)
+        {
+          if (d->follows[i].elems[j].index == i)
+            flags[d->follows[i].elems[j].index] |= OPT_REPEAT;
+          else if (d->follows[i].elems[j].index < i)
+            flags[d->follows[i].elems[j].index] |= OPT_LPAREN;
+          else if (flags[d->follows[i].elems[j].index] &= OPT_WALKED)
+            flags[d->follows[i].elems[j].index] |= OPT_RPAREN;
+          else
+            flags[d->follows[i].elems[j].index] |= OPT_WALKED;
+        }
+    }
+
+  flags[0] |= OPT_QUEUED;
+
+  position_set merged0;
+  position_set *merged = &merged0;
+  alloc_position_set (merged, d->nleaves);
+
+  d->constraints = xicalloc (d->tindex, sizeof *d->constraints);
+
+  for (idx_t i = 0; i < d->tindex; i++)
+    if (flags[i] & OPT_QUEUED)
+      merge_nfa_state (d, i, flags, merged);
+
+  reorder_tokens (d);
+
+  free (merged->elems);
+  free (flags);
+}
+
+/* Perform bottom-up analysis on the parse tree, computing various functions.
+   Note that at this point, we're pretending constructs like \< are real
+   characters rather than constraints on what can follow them.
+
+   Nullable:  A node is nullable if it is at the root of a regexp that can
+   match the empty string.
+   *  EMPTY leaves are nullable.
+   * No other leaf is nullable.
+   * A QMARK or STAR node is nullable.
+   * A PLUS node is nullable if its argument is nullable.
+   * A CAT node is nullable if both its arguments are nullable.
+   * An OR node is nullable if either argument is nullable.
+
+   Firstpos:  The firstpos of a node is the set of positions (nonempty leaves)
+   that could correspond to the first character of a string matching the
+   regexp rooted at the given node.
+   * EMPTY leaves have empty firstpos.
+   * The firstpos of a nonempty leaf is that leaf itself.
+   * The firstpos of a QMARK, STAR, or PLUS node is the firstpos of its
+     argument.
+   * The firstpos of a CAT node is the firstpos of the left argument, union
+     the firstpos of the right if the left argument is nullable.
+   * The firstpos of an OR node is the union of firstpos of each argument.
+
+   Lastpos:  The lastpos of a node is the set of positions that could
+   correspond to the last character of a string matching the regexp at
+   the given node.
+   * EMPTY leaves have empty lastpos.
+   * The lastpos of a nonempty leaf is that leaf itself.
+   * The lastpos of a QMARK, STAR, or PLUS node is the lastpos of its
+     argument.
+   * The lastpos of a CAT node is the lastpos of its right argument, union
+     the lastpos of the left if the right argument is nullable.
+   * The lastpos of an OR node is the union of the lastpos of each argument.
+
+   Follow:  The follow of a position is the set of positions that could
+   correspond to the character following a character matching the node in
+   a string matching the regexp.  At this point we consider special symbols
+   that match the empty string in some context to be just normal characters.
+   Later, if we find that a special symbol is in a follow set, we will
+   replace it with the elements of its follow, labeled with an appropriate
+   constraint.
+   * Every node in the firstpos of the argument of a STAR or PLUS node is in
+     the follow of every node in the lastpos.
+   * Every node in the firstpos of the second argument of a CAT node is in
+     the follow of every node in the lastpos of the first argument.
+
+   Because of the postfix representation of the parse tree, the depth-first
+   analysis is conveniently done by a linear scan with the aid of a stack.
+   Sets are stored as arrays of the elements, obeying a stack-like allocation
+   scheme; the number of elements in each set deeper in the stack can be
+   used to determine the address of a particular set's array.  */
+static void
+dfaanalyze (struct dfa *d, bool searchflag)
+{
+  /* Array allocated to hold position sets.  */
+  position *posalloc = xnmalloc (d->nleaves, 2 * sizeof *posalloc);
+  /* Firstpos and lastpos elements.  */
+  position *firstpos = posalloc;
+  position *lastpos = firstpos + d->nleaves;
+  position pos;
+  position_set tmp;
+
+  /* Stack for element counts and nullable flags.  */
+  struct
+  {
+    /* Whether the entry is nullable.  */
+    bool nullable;
+
+    /* Counts of firstpos and lastpos sets.  */
+    idx_t nfirstpos;
+    idx_t nlastpos;
+  } *stkalloc = xnmalloc (d->depth, sizeof *stkalloc), *stk = stkalloc;
+
+  position_set merged;          /* Result of merging sets.  */
+
+  addtok (d, CAT);
+  idx_t tindex = d->tindex;
+
+#ifdef DEBUG
+  fprintf (stderr, "dfaanalyze:\n");
+  for (idx_t i = 0; i < tindex; i++)
+    {
+      fprintf (stderr, " %td:", i);
+      prtok (d->tokens[i]);
+    }
+  putc ('\n', stderr);
+#endif
+
+  d->searchflag = searchflag;
+  alloc_position_set (&merged, d->nleaves);
+  d->follows = xicalloc (tindex, sizeof *d->follows);
+  position_set *backward
+    = d->epsilon ? xicalloc (tindex, sizeof *backward) : NULL;
+
+  for (idx_t i = 0; i < tindex; i++)
+    {
+      switch (d->tokens[i])
+        {
+        case EMPTY:
+          /* The empty set is nullable.  */
+          stk->nullable = true;
+
+          /* The firstpos and lastpos of the empty leaf are both empty.  */
+          stk->nfirstpos = stk->nlastpos = 0;
+          stk++;
+          break;
+
+        case STAR:
+        case PLUS:
+          /* Every element in the lastpos of the argument is in the backward
+             set of every element in the firstpos.  */
+          if (d->epsilon)
+            {
+              tmp.elems = lastpos - stk[-1].nlastpos;
+              tmp.nelem = stk[-1].nlastpos;
+              for (position *p = firstpos - stk[-1].nfirstpos;
+                   p < firstpos; p++)
+                merge2 (&backward[p->index], &tmp, &merged);
+            }
+
+          /* Every element in the firstpos of the argument is in the follow
+             of every element in the lastpos.  */
+          {
+            tmp.elems = firstpos - stk[-1].nfirstpos;
+            tmp.nelem = stk[-1].nfirstpos;
+            for (position *p = lastpos - stk[-1].nlastpos; p < lastpos; p++)
+              merge2 (&d->follows[p->index], &tmp, &merged);
+          }
+          FALLTHROUGH;
+        case QMARK:
+          /* A QMARK or STAR node is automatically nullable.  */
+          if (d->tokens[i] != PLUS)
+            stk[-1].nullable = true;
+          break;
+
+        case CAT:
+          /* Every element in the lastpos of the first argument is in
+             the backward set of every element in the firstpos of the
+             second argument.  */
+          if (backward)
+            {
+              tmp.nelem = stk[-2].nlastpos;
+              tmp.elems = lastpos - stk[-1].nlastpos - stk[-2].nlastpos;
+              for (position *p = firstpos - stk[-1].nfirstpos;
+                   p < firstpos; p++)
+                merge2 (&backward[p->index], &tmp, &merged);
+            }
+
+          /* Every element in the firstpos of the second argument is in the
+             follow of every element in the lastpos of the first argument.  */
+          {
+            tmp.nelem = stk[-1].nfirstpos;
+            tmp.elems = firstpos - stk[-1].nfirstpos;
+            for (position *plim = lastpos - stk[-1].nlastpos,
+                   *p = plim - stk[-2].nlastpos;
+                 p < plim; p++)
+              merge2 (&d->follows[p->index], &tmp, &merged);
+          }
+
+          /* The firstpos of a CAT node is the firstpos of the first argument,
+             union that of the second argument if the first is nullable.  */
+          if (stk[-2].nullable)
+            stk[-2].nfirstpos += stk[-1].nfirstpos;
+          else
+            firstpos -= stk[-1].nfirstpos;
+
+          /* The lastpos of a CAT node is the lastpos of the second argument,
+             union that of the first argument if the second is nullable.  */
+          if (stk[-1].nullable)
+            stk[-2].nlastpos += stk[-1].nlastpos;
+          else
+            {
+              position *p = lastpos - stk[-1].nlastpos - stk[-2].nlastpos;
+              for (idx_t j = 0; j < stk[-1].nlastpos; j++)
+                p[j] = p[j + stk[-2].nlastpos];
+              lastpos -= stk[-2].nlastpos;
+              stk[-2].nlastpos = stk[-1].nlastpos;
+            }
+
+          /* A CAT node is nullable if both arguments are nullable.  */
+          stk[-2].nullable &= stk[-1].nullable;
+          stk--;
+          break;
+
+        case OR:
+          /* The firstpos is the union of the firstpos of each argument.  */
+          stk[-2].nfirstpos += stk[-1].nfirstpos;
+
+          /* The lastpos is the union of the lastpos of each argument.  */
+          stk[-2].nlastpos += stk[-1].nlastpos;
+
+          /* An OR node is nullable if either argument is nullable.  */
+          stk[-2].nullable |= stk[-1].nullable;
+          stk--;
+          break;
+
+        default:
+          /* Anything else is a nonempty position.  (Note that special
+             constructs like \< are treated as nonempty strings here;
+             an "epsilon closure" effectively makes them nullable later.
+             Backreferences have to get a real position so we can detect
+             transitions on them later.  But they are nullable.  */
+          stk->nullable = d->tokens[i] == BACKREF;
+
+          /* This position is in its own firstpos and lastpos.  */
+          stk->nfirstpos = stk->nlastpos = 1;
+          stk++;
+
+          firstpos->index = lastpos->index = i;
+          firstpos->constraint = lastpos->constraint = NO_CONSTRAINT;
+          firstpos++, lastpos++;
+
+          break;
+        }
+#ifdef DEBUG
+      /* ... balance the above nonsyntactic #ifdef goo...  */
+      fprintf (stderr, "node %td:", i);
+      prtok (d->tokens[i]);
+      putc ('\n', stderr);
+      fprintf (stderr,
+               stk[-1].nullable ? " nullable: yes\n" : " nullable: no\n");
+      fprintf (stderr, " firstpos:");
+      for (idx_t j = 0; j < stk[-1].nfirstpos; j++)
+        {
+          fprintf (stderr, " %td:", firstpos[j - stk[-1].nfirstpos].index);
+          prtok (d->tokens[firstpos[j - stk[-1].nfirstpos].index]);
+        }
+      fprintf (stderr, "\n lastpos:");
+      for (idx_t j = 0; j < stk[-1].nlastpos; j++)
+        {
+          fprintf (stderr, " %td:", lastpos[j - stk[-1].nlastpos].index);
+          prtok (d->tokens[lastpos[j - stk[-1].nlastpos].index]);
+        }
+      putc ('\n', stderr);
+#endif
+    }
+
+  if (backward)
+    {
+      /* For each follow set that is the follow set of a real position,
+         replace it with its epsilon closure.  */
+      epsclosure (d, backward);
+
+      for (idx_t i = 0; i < tindex; i++)
+        free (backward[i].elems);
+      free (backward);
+    }
+
+  dfaoptimize (d);
+
+#ifdef DEBUG
+  for (idx_t i = 0; i < tindex; i++)
+    if (d->tokens[i] == BEG || d->tokens[i] < NOTCHAR
+        || d->tokens[i] == BACKREF || d->tokens[i] == ANYCHAR
+        || d->tokens[i] == MBCSET || d->tokens[i] >= CSET)
+      {
+        fprintf (stderr, "follows(%td:", i);
+        prtok (d->tokens[i]);
+        fprintf (stderr, "):");
+        for (idx_t j = 0; j < d->follows[i].nelem; j++)
+          {
+            fprintf (stderr, " %td:", d->follows[i].elems[j].index);
+            prtok (d->tokens[d->follows[i].elems[j].index]);
+          }
+        putc ('\n', stderr);
+      }
+#endif
+
+  pos.index = 0;
+  pos.constraint = NO_CONSTRAINT;
+
+  alloc_position_set (&tmp, 1);
+
+  append (pos, &tmp);
+
+  d->separates = xicalloc (tindex, sizeof *d->separates);
+
+  for (idx_t i = 0; i < tindex; i++)
+    {
+      if (prev_newline_dependent (d->constraints[i]))
+        d->separates[i] |= CTX_NEWLINE;
+      if (prev_letter_dependent (d->constraints[i]))
+        d->separates[i] |= CTX_LETTER;
+
+      for (idx_t j = 0; j < d->follows[i].nelem; j++)
+        {
+          if (prev_newline_dependent (d->follows[i].elems[j].constraint))
+            d->separates[i] |= CTX_NEWLINE;
+          if (prev_letter_dependent (d->follows[i].elems[j].constraint))
+            d->separates[i] |= CTX_LETTER;
+        }
+    }
+
+  /* Context wanted by some position.  */
+  int separate_contexts = state_separate_contexts (d, &tmp);
+
+  /* Build the initial state.  */
+  if (separate_contexts & CTX_NEWLINE)
+    state_index (d, &tmp, CTX_NEWLINE);
+  d->initstate_notbol = d->min_trcount
+    = state_index (d, &tmp, separate_contexts ^ CTX_ANY);
+  if (separate_contexts & CTX_LETTER)
+    d->min_trcount = state_index (d, &tmp, CTX_LETTER);
+  d->min_trcount++;
+  d->trcount = 0;
+
+  free (posalloc);
+  free (stkalloc);
+  free (merged.elems);
+  free (tmp.elems);
+}
+
+/* Make sure D's state arrays are large enough to hold NEW_STATE.  */
+static void
+realloc_trans_if_necessary (struct dfa *d)
+{
+  state_num oldalloc = d->tralloc;
+  if (oldalloc < d->sindex)
+    {
+      state_num **realtrans = d->trans ? d->trans - 2 : NULL;
+      idx_t newalloc1 = realtrans ? d->tralloc + 2 : 0;
+      realtrans = xpalloc (realtrans, &newalloc1, d->sindex - oldalloc,
+                           -1, sizeof *realtrans);
+      realtrans[0] = realtrans[1] = NULL;
+      d->trans = realtrans + 2;
+      idx_t newalloc = d->tralloc = newalloc1 - 2;
+      d->fails = xreallocarray (d->fails, newalloc, sizeof *d->fails);
+      d->success = xreallocarray (d->success, newalloc, sizeof *d->success);
+      d->newlines = xreallocarray (d->newlines, newalloc, sizeof *d->newlines);
+      if (d->localeinfo.multibyte)
+        {
+          realtrans = d->mb_trans ? d->mb_trans - 2 : NULL;
+          realtrans = xreallocarray (realtrans, newalloc1, sizeof *realtrans);
+          if (oldalloc == 0)
+            realtrans[0] = realtrans[1] = NULL;
+          d->mb_trans = realtrans + 2;
+        }
+      for (; oldalloc < newalloc; oldalloc++)
+        {
+          d->trans[oldalloc] = NULL;
+          d->fails[oldalloc] = NULL;
+          if (d->localeinfo.multibyte)
+            d->mb_trans[oldalloc] = NULL;
+        }
+    }
+}
+
+/*
+   Calculate the transition table for a new state derived from state s
+   for a compiled dfa d after input character uc, and return the new
+   state number.
+
+   Do not worry about all possible input characters; calculate just the group
+   of positions that match uc.  Label it with the set of characters that
+   every position in the group matches (taking into account, if necessary,
+   preceding context information of s).  Then find the union
+   of these positions' follows, i.e., the set of positions of the
+   new state.  For each character in the group's label, set the transition
+   on this character to be to a state corresponding to the set's positions,
+   and its associated backward context information, if necessary.
+
+   When building a searching matcher, include the positions of state
+   0 in every state.
+
+   The group is constructed by building an equivalence-class
+   partition of the positions of s.
+
+   For each position, find the set of characters C that it matches.  Eliminate
+   any characters from C that fail on grounds of backward context.
+
+   Check whether the group's label L has nonempty
+   intersection with C.  If L - C is nonempty, create a new group labeled
+   L - C and having the same positions as the current group, and set L to
+   the intersection of L and C.  Insert the position in the group, set
+   C = C - L, and resume scanning.
+
+   If after comparing with every group there are characters remaining in C,
+   create a new group labeled with the characters of C and insert this
+   position in that group.  */
+
+static state_num
+build_state (state_num s, struct dfa *d, unsigned char uc)
+{
+  position_set follows;         /* Union of the follows for each
+                                   position of the current state.  */
+  position_set group;           /* Positions that match the input char.  */
+  position_set tmp;             /* Temporary space for merging sets.  */
+  state_num state;              /* New state.  */
+  state_num state_newline;      /* New state on a newline transition.  */
+  state_num state_letter;       /* New state on a letter transition.  */
+
+#ifdef DEBUG
+  fprintf (stderr, "build state %td\n", s);
+#endif
+
+  /* A pointer to the new transition table, and the table itself.  */
+  state_num **ptrans = (accepting (s, d) ? d->fails : d->trans) + s;
+  state_num *trans = *ptrans;
+
+  if (!trans)
+    {
+      /* MAX_TRCOUNT is an arbitrary upper limit on the number of
+         transition tables that can exist at once, other than for
+         initial states.  Often-used transition tables are quickly
+         rebuilt, whereas rarely-used ones are cleared away.  */
+      if (MAX_TRCOUNT <= d->trcount)
+        {
+          for (state_num i = d->min_trcount; i < d->tralloc; i++)
+            {
+              free (d->trans[i]);
+              free (d->fails[i]);
+              d->trans[i] = d->fails[i] = NULL;
+            }
+          d->trcount = 0;
+        }
+
+      d->trcount++;
+      *ptrans = trans = xmalloc (NOTCHAR * sizeof *trans);
+
+      /* Fill transition table with a default value which means that the
+         transited state has not been calculated yet.  */
+      for (int i = 0; i < NOTCHAR; i++)
+        trans[i] = -2;
+    }
+
+  /* Set up the success bits for this state.  */
+  d->success[s] = 0;
+  if (accepts_in_context (d->states[s].context, CTX_NEWLINE, s, d))
+    d->success[s] |= CTX_NEWLINE;
+  if (accepts_in_context (d->states[s].context, CTX_LETTER, s, d))
+    d->success[s] |= CTX_LETTER;
+  if (accepts_in_context (d->states[s].context, CTX_NONE, s, d))
+    d->success[s] |= CTX_NONE;
+
+  alloc_position_set (&follows, d->nleaves);
+
+  /* Find the union of the follows of the positions of the group.
+     This is a hideously inefficient loop.  Fix it someday.  */
+  for (idx_t j = 0; j < d->states[s].elems.nelem; j++)
+    for (idx_t k = 0;
+         k < d->follows[d->states[s].elems.elems[j].index].nelem; ++k)
+      insert (d->follows[d->states[s].elems.elems[j].index].elems[k],
+              &follows);
+
+  /* Positions that match the input char.  */
+  alloc_position_set (&group, d->nleaves);
+
+  /* The group's label.  */
+  charclass label;
+  fillset (&label);
+
+  for (idx_t i = 0; i < follows.nelem; i++)
+    {
+      charclass matches;            /* Set of matching characters.  */
+      position pos = follows.elems[i];
+      bool matched = false;
+      if (d->tokens[pos.index] >= 0 && d->tokens[pos.index] < NOTCHAR)
+        {
+          zeroset (&matches);
+          setbit (d->tokens[pos.index], &matches);
+          if (d->tokens[pos.index] == uc)
+            matched = true;
+        }
+      else if (d->tokens[pos.index] >= CSET)
+        {
+          matches = d->charclasses[d->tokens[pos.index] - CSET];
+          if (tstbit (uc, &matches))
+            matched = true;
+        }
+      else if (d->tokens[pos.index] == ANYCHAR)
+        {
+          matches = d->charclasses[d->canychar];
+          if (tstbit (uc, &matches))
+            matched = true;
+
+          /* ANYCHAR must match with a single character, so we must put
+             it to D->states[s].mbps which contains the positions which
+             can match with a single character not a byte.  If all
+             positions which has ANYCHAR does not depend on context of
+             next character, we put the follows instead of it to
+             D->states[s].mbps to optimize.  */
+          if (succeeds_in_context (pos.constraint, d->states[s].context,
+                                   CTX_NONE))
+            {
+              if (d->states[s].mbps.nelem == 0)
+                alloc_position_set (&d->states[s].mbps, 1);
+              insert (pos, &d->states[s].mbps);
+            }
+        }
+      else
+        continue;
+
+      /* Some characters may need to be eliminated from matches because
+         they fail in the current context.  */
+      if (pos.constraint != NO_CONSTRAINT)
+        {
+          if (!succeeds_in_context (pos.constraint,
+                                    d->states[s].context, CTX_NEWLINE))
+            for (int j = 0; j < CHARCLASS_WORDS; j++)
+              matches.w[j] &= ~d->syntax.newline.w[j];
+          if (!succeeds_in_context (pos.constraint,
+                                    d->states[s].context, CTX_LETTER))
+            for (int j = 0; j < CHARCLASS_WORDS; ++j)
+              matches.w[j] &= ~d->syntax.letters.w[j];
+          if (!succeeds_in_context (pos.constraint,
+                                    d->states[s].context, CTX_NONE))
+            for (int j = 0; j < CHARCLASS_WORDS; ++j)
+              matches.w[j] &= d->syntax.letters.w[j] | d->syntax.newline.w[j];
+
+          /* If there are no characters left, there's no point in going on.  */
+          if (emptyset (&matches))
+            continue;
+
+          /* If we have reset the bit that made us declare "matched", reset
+             that indicator, too.  This is required to avoid an infinite loop
+             with this command: echo cx | LC_ALL=C grep -E 'c\b[x ]'  */
+          if (!tstbit (uc, &matches))
+            matched = false;
+        }
+
+#ifdef DEBUG
+      fprintf (stderr, " nextpos %td:", pos.index);
+      prtok (d->tokens[pos.index]);
+      fprintf (stderr, " of");
+      for (unsigned j = 0; j < NOTCHAR; j++)
+        if (tstbit (j, &matches))
+          fprintf (stderr, " 0x%02x", j);
+      fprintf (stderr, "\n");
+#endif
+
+      if (matched)
+        {
+          for (int k = 0; k < CHARCLASS_WORDS; ++k)
+            label.w[k] &= matches.w[k];
+          append (pos, &group);
+        }
+      else
+        {
+          for (int k = 0; k < CHARCLASS_WORDS; ++k)
+            label.w[k] &= ~matches.w[k];
+        }
+    }
+
+  alloc_position_set (&tmp, d->nleaves);
+
+  if (group.nelem > 0)
+    {
+      /* If we are building a searching matcher, throw in the positions
+         of state 0 as well, if possible.  */
+      if (d->searchflag)
+        {
+          /* If a token in follows.elems is not 1st byte of a multibyte
+             character, or the states of follows must accept the bytes
+             which are not 1st byte of the multibyte character.
+             Then, if a state of follows encounters a byte, it must not be
+             a 1st byte of a multibyte character nor a single byte character.
+             In this case, do not add state[0].follows to next state, because
+             state[0] must accept 1st-byte.
+
+             For example, suppose <sb a> is a certain single byte character,
+             <mb A> is a certain multibyte character, and the codepoint of
+             <sb a> equals the 2nd byte of the codepoint of <mb A>.  When
+             state[0] accepts <sb a>, state[i] transits to state[i+1] by
+             accepting the 1st byte of <mb A>, and state[i+1] accepts the
+             2nd byte of <mb A>, if state[i+1] encounters the codepoint of
+             <sb a>, it must not be <sb a> but the 2nd byte of <mb A>, so do
+             not add state[0].  */
+
+          bool mergeit = !d->localeinfo.multibyte;
+          if (!mergeit)
+            {
+              mergeit = true;
+              for (idx_t j = 0; mergeit && j < group.nelem; j++)
+                mergeit &= d->multibyte_prop[group.elems[j].index];
+            }
+          if (mergeit)
+            merge2 (&group, &d->states[0].elems, &tmp);
+        }
+
+      /* Find out if the new state will want any context information,
+         by calculating possible contexts that the group can match,
+         and separate contexts that the new state wants to know.  */
+      int possible_contexts = charclass_context (d, &label);
+      int separate_contexts = state_separate_contexts (d, &group);
+
+      /* Find the state(s) corresponding to the union of the follows.  */
+      if (possible_contexts & ~separate_contexts)
+        state = state_index (d, &group, separate_contexts ^ CTX_ANY);
+      else
+        state = -1;
+      if (separate_contexts & possible_contexts & CTX_NEWLINE)
+        state_newline = state_index (d, &group, CTX_NEWLINE);
+      else
+        state_newline = state;
+      if (separate_contexts & possible_contexts & CTX_LETTER)
+        state_letter = state_index (d, &group, CTX_LETTER);
+      else
+        state_letter = state;
+
+      /* Reallocate now, to reallocate any newline transition properly.  */
+      realloc_trans_if_necessary (d);
+    }
+
+  /* If we are a searching matcher, the default transition is to a state
+     containing the positions of state 0, otherwise the default transition
+     is to fail miserably.  */
+  else if (d->searchflag)
+    {
+      state_newline = 0;
+      state_letter = d->min_trcount - 1;
+      state = d->initstate_notbol;
+    }
+  else
+    {
+      state_newline = -1;
+      state_letter = -1;
+      state = -1;
+    }
+
+  /* Set the transitions for each character in the label.  */
+  for (int i = 0; i < NOTCHAR; i++)
+    if (tstbit (i, &label))
+      switch (d->syntax.sbit[i])
+        {
+        case CTX_NEWLINE:
+          trans[i] = state_newline;
+          break;
+        case CTX_LETTER:
+          trans[i] = state_letter;
+          break;
+        default:
+          trans[i] = state;
+          break;
+        }
+
+#ifdef DEBUG
+  fprintf (stderr, "trans table %td", s);
+  for (int i = 0; i < NOTCHAR; ++i)
+    {
+      if (!(i & 0xf))
+        fprintf (stderr, "\n");
+      fprintf (stderr, " %2td", trans[i]);
+    }
+  fprintf (stderr, "\n");
+#endif
+
+  free (group.elems);
+  free (follows.elems);
+  free (tmp.elems);
+
+  /* Keep the newline transition in a special place so we can use it as
+     a sentinel.  */
+  if (tstbit (d->syntax.eolbyte, &label))
+    {
+      d->newlines[s] = trans[d->syntax.eolbyte];
+      trans[d->syntax.eolbyte] = -1;
+    }
+
+  return trans[uc];
+}
+
+/* Multibyte character handling sub-routines for dfaexec.  */
+
+/* Consume a single byte and transit state from 's' to '*next_state'.
+   This function is almost same as the state transition routin in dfaexec.
+   But state transition is done just once, otherwise matching succeed or
+   reach the end of the buffer.  */
+static state_num
+transit_state_singlebyte (struct dfa *d, state_num s, unsigned char const **pp)
+{
+  state_num *t;
+
+  if (d->trans[s])
+    t = d->trans[s];
+  else if (d->fails[s])
+    t = d->fails[s];
+  else
+    {
+      build_state (s, d, **pp);
+      if (d->trans[s])
+        t = d->trans[s];
+      else
+        {
+          t = d->fails[s];
+          assert (t);
+        }
+    }
+
+  if (t[**pp] == -2)
+    build_state (s, d, **pp);
+
+  return t[*(*pp)++];
+}
+
+/* Transit state from s, then return new state and update the pointer of
+   the buffer.  This function is for a period operator which can match a
+   multi-byte character.  */
+static state_num
+transit_state (struct dfa *d, state_num s, unsigned char const **pp,
+               unsigned char const *end)
+{
+  wint_t wc;
+
+  int mbclen = mbs_to_wchar (&wc, (char const *) *pp, end - *pp, d);
+
+  /* This state has some operators which can match a multibyte character.  */
+  d->mb_follows.nelem = 0;
+
+  /* Calculate the state which can be reached from the state 's' by
+     consuming 'mbclen' single bytes from the buffer.  */
+  state_num s1 = s;
+  int mbci;
+  for (mbci = 0; mbci < mbclen && (mbci == 0 || d->min_trcount <= s); mbci++)
+    s = transit_state_singlebyte (d, s, pp);
+  *pp += mbclen - mbci;
+
+  if (wc == WEOF)
+    {
+      /* It is an invalid character, so ANYCHAR is not accepted.  */
+      return s;
+    }
+
+  /* If all positions which have ANYCHAR do not depend on the context
+     of the next character, calculate the next state with
+     pre-calculated follows and cache the result.  */
+  if (d->states[s1].mb_trindex < 0)
+    {
+      if (MAX_TRCOUNT <= d->mb_trcount)
+        {
+          state_num s3;
+          for (s3 = -1; s3 < d->tralloc; s3++)
+            {
+              free (d->mb_trans[s3]);
+              d->mb_trans[s3] = NULL;
+            }
+
+          for (state_num i = 0; i < d->sindex; i++)
+            d->states[i].mb_trindex = -1;
+          d->mb_trcount = 0;
+        }
+      d->states[s1].mb_trindex = d->mb_trcount++;
+    }
+
+  if (! d->mb_trans[s])
+    {
+      enum { TRANSPTR_SIZE = sizeof *d->mb_trans[s] };
+      enum { TRANSALLOC_SIZE = MAX_TRCOUNT * TRANSPTR_SIZE };
+      d->mb_trans[s] = xmalloc (TRANSALLOC_SIZE);
+      for (int i = 0; i < MAX_TRCOUNT; i++)
+        d->mb_trans[s][i] = -1;
+    }
+  else if (d->mb_trans[s][d->states[s1].mb_trindex] >= 0)
+    return d->mb_trans[s][d->states[s1].mb_trindex];
+
+  if (s == -1)
+    copy (&d->states[s1].mbps, &d->mb_follows);
+  else
+    merge (&d->states[s1].mbps, &d->states[s].elems, &d->mb_follows);
+
+  int separate_contexts = state_separate_contexts (d, &d->mb_follows);
+  state_num s2 = state_index (d, &d->mb_follows, separate_contexts ^ CTX_ANY);
+  realloc_trans_if_necessary (d);
+
+  d->mb_trans[s][d->states[s1].mb_trindex] = s2;
+
+  return s2;
+}
+
+/* The initial state may encounter a byte which is not a single byte character
+   nor the first byte of a multibyte character.  But it is incorrect for the
+   initial state to accept such a byte.  For example, in Shift JIS the regular
+   expression "\\" accepts the codepoint 0x5c, but should not accept the second
+   byte of the codepoint 0x815c.  Then the initial state must skip the bytes
+   that are not a single byte character nor the first byte of a multibyte
+   character.
+
+   Given DFA state d, use mbs_to_wchar to advance MBP until it reaches
+   or exceeds P, and return the advanced MBP.  If WCP is non-NULL and
+   the result is greater than P, set *WCP to the final wide character
+   processed, or to WEOF if no wide character is processed.  Otherwise,
+   if WCP is non-NULL, *WCP may or may not be updated.
+
+   Both P and MBP must be no larger than END.  */
+static unsigned char const *
+skip_remains_mb (struct dfa *d, unsigned char const *p,
+                 unsigned char const *mbp, char const *end)
+{
+  if (d->syntax.never_trail[*p])
+    return p;
+  while (mbp < p)
+    {
+      wint_t wc;
+      mbp += mbs_to_wchar (&wc, (char const *) mbp,
+                           end - (char const *) mbp, d);
+    }
+  return mbp;
+}
+
+/* Search through a buffer looking for a match to the struct dfa *D.
+   Find the first occurrence of a string matching the regexp in the
+   buffer, and the shortest possible version thereof.  Return a pointer to
+   the first character after the match, or NULL if none is found.  BEGIN
+   points to the beginning of the buffer, and END points to the first byte
+   after its end.  Note however that we store a sentinel byte (usually
+   newline) in *END, so the actual buffer must be one byte longer.
+   When ALLOW_NL, newlines may appear in the matching string.
+   If COUNT is non-NULL, increment *COUNT once for each newline processed.
+   If MULTIBYTE, the input consists of multibyte characters and/or
+   encoding-error bytes.  Otherwise, it consists of single-byte characters.
+   Here is the list of features that make this DFA matcher punt:
+    - [M-N] range in non-simple locale: regex is up to 25% faster on [a-z]
+    - [^...] in non-simple locale
+    - [[=foo=]] or [[.foo.]]
+    - [[:alpha:]] etc. in multibyte locale (except [[:digit:]] works OK)
+    - back-reference: (.)\1
+    - word-delimiter in multibyte locale: \<, \>, \b, \B
+   See struct localeinfo.simple for the definition of "simple locale".  */
+
+static inline char *
+dfaexec_main (struct dfa *d, char const *begin, char *end, bool allow_nl,
+              ptrdiff_t *count, bool multibyte)
+{
+  if (MAX_TRCOUNT <= d->sindex)
+    {
+      for (state_num s = d->min_trcount; s < d->sindex; s++)
+        {
+          free (d->states[s].elems.elems);
+          free (d->states[s].mbps.elems);
+        }
+      d->sindex = d->min_trcount;
+
+      if (d->trans)
+        {
+          for (state_num s = 0; s < d->tralloc; s++)
+            {
+              free (d->trans[s]);
+              free (d->fails[s]);
+              d->trans[s] = d->fails[s] = NULL;
+            }
+          d->trcount = 0;
+        }
+
+      if (d->localeinfo.multibyte && d->mb_trans)
+        {
+          for (state_num s = -1; s < d->tralloc; s++)
+            {
+              free (d->mb_trans[s]);
+              d->mb_trans[s] = NULL;
+            }
+          for (state_num s = 0; s < d->min_trcount; s++)
+            d->states[s].mb_trindex = -1;
+          d->mb_trcount = 0;
+        }
+    }
+
+  if (!d->tralloc)
+    realloc_trans_if_necessary (d);
+
+  /* Current state.  */
+  state_num s = 0, s1 = 0;
+
+  /* Current input character.  */
+  unsigned char const *p = (unsigned char const *) begin;
+  unsigned char const *mbp = p;
+
+  /* Copy of d->trans so it can be optimized into a register.  */
+  state_num **trans = d->trans;
+  unsigned char eol = d->syntax.eolbyte;  /* Likewise for eolbyte.  */
+  unsigned char saved_end = *(unsigned char *) end;
+  *end = eol;
+
+  if (multibyte)
+    {
+      memset (&d->mbs, 0, sizeof d->mbs);
+      if (d->mb_follows.alloc == 0)
+        alloc_position_set (&d->mb_follows, d->nleaves);
+    }
+
+  idx_t nlcount = 0;
+  for (;;)
+    {
+      state_num *t;
+      while ((t = trans[s]) != NULL)
+        {
+          if (s < d->min_trcount)
+            {
+              if (!multibyte || d->states[s].mbps.nelem == 0)
+                {
+                  while (t[*p] == s)
+                    p++;
+                }
+              if (multibyte)
+                p = mbp = skip_remains_mb (d, p, mbp, end);
+            }
+
+          if (multibyte)
+            {
+              s1 = s;
+
+              if (d->states[s].mbps.nelem == 0
+                  || d->localeinfo.sbctowc[*p] != WEOF || (char *) p >= end)
+                {
+                  /* If an input character does not match ANYCHAR, do it
+                     like a single-byte character.  */
+                  s = t[*p++];
+                }
+              else
+                {
+                  s = transit_state (d, s, &p, (unsigned char *) end);
+                  mbp = p;
+                  trans = d->trans;
+                }
+            }
+          else
+            {
+              s1 = t[*p++];
+              t = trans[s1];
+              if (! t)
+                {
+                  state_num tmp = s;
+                  s = s1;
+                  s1 = tmp;     /* swap */
+                  break;
+                }
+              if (s < d->min_trcount)
+                {
+                  while (t[*p] == s1)
+                    p++;
+                }
+              s = t[*p++];
+            }
+        }
+
+      if (s < 0)
+        {
+          if (s == -2)
+            {
+              s = build_state (s1, d, p[-1]);
+              trans = d->trans;
+            }
+          else if ((char *) p <= end && p[-1] == eol && 0 <= d->newlines[s1])
+            {
+              /* The previous character was a newline.  Count it, and skip
+                 checking of multibyte character boundary until here.  */
+              nlcount++;
+              mbp = p;
+
+              s = (allow_nl ? d->newlines[s1]
+                   : d->syntax.sbit[eol] == CTX_NEWLINE ? 0
+                   : d->syntax.sbit[eol] == CTX_LETTER ? d->min_trcount - 1
+                   : d->initstate_notbol);
+            }
+          else
+            {
+              p = NULL;
+              goto done;
+            }
+        }
+      else if (d->fails[s])
+        {
+          if ((d->success[s] & d->syntax.sbit[*p])
+              || ((char *) p == end
+                  && accepts_in_context (d->states[s].context, CTX_NEWLINE, s,
+                                         d)))
+            goto done;
+
+          if (multibyte && s < d->min_trcount)
+            p = mbp = skip_remains_mb (d, p, mbp, end);
+
+          s1 = s;
+          if (!multibyte || d->states[s].mbps.nelem == 0
+              || d->localeinfo.sbctowc[*p] != WEOF || (char *) p >= end)
+            {
+              /* If a input character does not match ANYCHAR, do it
+                 like a single-byte character.  */
+              s = d->fails[s][*p++];
+            }
+          else
+            {
+              s = transit_state (d, s, &p, (unsigned char *) end);
+              mbp = p;
+              trans = d->trans;
+            }
+        }
+      else
+        {
+          build_state (s, d, p[0]);
+          trans = d->trans;
+        }
+    }
+
+ done:
+  if (count)
+    *count += nlcount;
+  *end = saved_end;
+  return (char *) p;
+}
+
+/* Specialized versions of dfaexec for multibyte and single-byte cases.
+   This is for performance, as dfaexec_main is an inline function.  */
+
+static char *
+dfaexec_mb (struct dfa *d, char const *begin, char *end,
+            bool allow_nl, ptrdiff_t *count, bool *backref)
+{
+  return dfaexec_main (d, begin, end, allow_nl, count, true);
+}
+
+static char *
+dfaexec_sb (struct dfa *d, char const *begin, char *end,
+            bool allow_nl, ptrdiff_t *count, bool *backref)
+{
+  return dfaexec_main (d, begin, end, allow_nl, count, false);
+}
+
+/* Always set *BACKREF and return BEGIN.  Use this wrapper for
+   any regexp that uses a construct not supported by this code.  */
+static char *
+dfaexec_noop (struct dfa *d, char const *begin, char *end,
+              bool allow_nl, ptrdiff_t *count, bool *backref)
+{
+  *backref = true;
+  return (char *) begin;
+}
+
+/* Like dfaexec_main (D, BEGIN, END, ALLOW_NL, COUNT, D->localeinfo.multibyte),
+   but faster and set *BACKREF if the DFA code does not support this
+   regexp usage.  */
+
+char *
+dfaexec (struct dfa *d, char const *begin, char *end,
+         bool allow_nl, ptrdiff_t *count, bool *backref)
+{
+  return d->dfaexec (d, begin, end, allow_nl, count, backref);
+}
+
+struct dfa *
+dfasuperset (struct dfa const *d)
+{
+  return d->superset;
+}
+
+bool
+dfaisfast (struct dfa const *d)
+{
+  return d->fast;
+}
+
+static void
+free_mbdata (struct dfa *d)
+{
+  free (d->multibyte_prop);
+  free (d->lex.brack.chars);
+  free (d->mb_follows.elems);
+
+  if (d->mb_trans)
+    {
+      state_num s;
+      for (s = -1; s < d->tralloc; s++)
+        free (d->mb_trans[s]);
+      free (d->mb_trans - 2);
+    }
+}
+
+/* Return true if every construct in D is supported by this DFA matcher.  */
+bool
+dfasupported (struct dfa const *d)
+{
+  for (idx_t i = 0; i < d->tindex; i++)
+    {
+      switch (d->tokens[i])
+        {
+        case BEGWORD:
+        case ENDWORD:
+        case LIMWORD:
+        case NOTLIMWORD:
+          if (!d->localeinfo.multibyte)
+            continue;
+          FALLTHROUGH;
+        case BACKREF:
+        case MBCSET:
+          return false;
+        }
+    }
+  return true;
+}
+
+/* Disable use of the superset DFA if it is not likely to help
+   performance.  */
+static void
+maybe_disable_superset_dfa (struct dfa *d)
+{
+  if (!d->localeinfo.using_utf8)
+    return;
+
+  bool have_backref = false;
+  for (idx_t i = 0; i < d->tindex; i++)
+    {
+      switch (d->tokens[i])
+        {
+        case ANYCHAR:
+          /* Lowered.  */
+          abort ();
+        case BACKREF:
+          have_backref = true;
+          break;
+        case MBCSET:
+          /* Requires multi-byte algorithm.  */
+          return;
+        default:
+          break;
+        }
+    }
+
+  if (!have_backref && d->superset)
+    {
+      /* The superset DFA is not likely to be much faster, so remove it.  */
+      dfafree (d->superset);
+      free (d->superset);
+      d->superset = NULL;
+    }
+
+  free_mbdata (d);
+  d->localeinfo.multibyte = false;
+  d->dfaexec = dfaexec_sb;
+  d->fast = true;
+}
+
+static void
+dfassbuild (struct dfa *d)
+{
+  struct dfa *sup = dfaalloc ();
+
+  *sup = *d;
+  sup->localeinfo.multibyte = false;
+  sup->dfaexec = dfaexec_sb;
+  sup->multibyte_prop = NULL;
+  sup->superset = NULL;
+  sup->states = NULL;
+  sup->sindex = 0;
+  sup->constraints = NULL;
+  sup->separates = NULL;
+  sup->follows = NULL;
+  sup->tralloc = 0;
+  sup->trans = NULL;
+  sup->fails = NULL;
+  sup->success = NULL;
+  sup->newlines = NULL;
+
+  sup->charclasses = xnmalloc (sup->calloc, sizeof *sup->charclasses);
+  if (d->cindex)
+    {
+      memcpy (sup->charclasses, d->charclasses,
+              d->cindex * sizeof *sup->charclasses);
+    }
+
+  sup->tokens = xnmalloc (d->tindex, 2 * sizeof *sup->tokens);
+  sup->talloc = d->tindex * 2;
+
+  bool have_achar = false;
+  bool have_nchar = false;
+  idx_t j;
+  for (idx_t i = j = 0; i < d->tindex; i++)
+    {
+      switch (d->tokens[i])
+        {
+        case ANYCHAR:
+        case MBCSET:
+        case BACKREF:
+          {
+            charclass ccl;
+            fillset (&ccl);
+            sup->tokens[j++] = CSET + charclass_index (sup, &ccl);
+            sup->tokens[j++] = STAR;
+            if (d->tokens[i + 1] == QMARK || d->tokens[i + 1] == STAR
+                || d->tokens[i + 1] == PLUS)
+              i++;
+            have_achar = true;
+          }
+          break;
+        case BEGWORD:
+        case ENDWORD:
+        case LIMWORD:
+        case NOTLIMWORD:
+          if (d->localeinfo.multibyte)
+            {
+              /* These constraints aren't supported in a multibyte locale.
+                 Ignore them in the superset DFA.  */
+              sup->tokens[j++] = EMPTY;
+              break;
+            }
+          FALLTHROUGH;
+        default:
+          sup->tokens[j++] = d->tokens[i];
+          if ((0 <= d->tokens[i] && d->tokens[i] < NOTCHAR)
+              || d->tokens[i] >= CSET)
+            have_nchar = true;
+          break;
+        }
+    }
+  sup->tindex = j;
+
+  if (have_nchar && (have_achar || d->localeinfo.multibyte))
+    d->superset = sup;
+  else
+    {
+      dfafree (sup);
+      free (sup);
+    }
+}
+
+/* Parse a string S of length LEN into D (but skip this step if S is null).
+   Then analyze D and build a matcher for it.
+   SEARCHFLAG says whether to build a searching or an exact matcher.  */
+void
+dfacomp (char const *s, idx_t len, struct dfa *d, bool searchflag)
+{
+  if (s != NULL)
+    dfaparse (s, len, d);
+
+  dfassbuild (d);
+
+  if (dfasupported (d))
+    {
+      maybe_disable_superset_dfa (d);
+      dfaanalyze (d, searchflag);
+    }
+  else
+    {
+      d->dfaexec = dfaexec_noop;
+    }
+
+  if (d->superset)
+    {
+      d->fast = true;
+      dfaanalyze (d->superset, searchflag);
+    }
+}
+
+/* Free the storage held by the components of a dfa.  */
+void
+dfafree (struct dfa *d)
+{
+  free (d->charclasses);
+  free (d->tokens);
+
+  if (d->localeinfo.multibyte)
+    free_mbdata (d);
+
+  free (d->constraints);
+  free (d->separates);
+
+  for (idx_t i = 0; i < d->sindex; i++)
+    {
+      free (d->states[i].elems.elems);
+      free (d->states[i].mbps.elems);
+    }
+  free (d->states);
+
+  if (d->follows)
+    {
+      for (idx_t i = 0; i < d->tindex; i++)
+        free (d->follows[i].elems);
+      free (d->follows);
+    }
+
+  if (d->trans)
+    {
+      for (idx_t i = 0; i < d->tralloc; i++)
+        {
+          free (d->trans[i]);
+          free (d->fails[i]);
+        }
+
+      free (d->trans - 2);
+      free (d->fails);
+      free (d->newlines);
+      free (d->success);
+    }
+
+  if (d->superset)
+    {
+      dfafree (d->superset);
+      free (d->superset);
+    }
+}
+
+/* Having found the postfix representation of the regular expression,
+   try to find a long sequence of characters that must appear in any line
+   containing the r.e.
+   Finding a "longest" sequence is beyond the scope here;
+   we take an easy way out and hope for the best.
+   (Take "(ab|a)b"--please.)
+
+   We do a bottom-up calculation of sequences of characters that must appear
+   in matches of r.e.'s represented by trees rooted at the nodes of the postfix
+   representation:
+        sequences that must appear at the left of the match ("left")
+        sequences that must appear at the right of the match ("right")
+        lists of sequences that must appear somewhere in the match ("in")
+        sequences that must constitute the match ("is")
+
+   When we get to the root of the tree, we use one of the longest of its
+   calculated "in" sequences as our answer.
+
+   The sequences calculated for the various types of node (in pseudo ANSI c)
+   are shown below.  "p" is the operand of unary operators (and the left-hand
+   operand of binary operators); "q" is the right-hand operand of binary
+   operators.
+
+   "ZERO" means "a zero-length sequence" below.
+
+        Type	left		right		is		in
+        ----	----		-----		--		--
+        char c	# c		# c		# c		# c
+
+        ANYCHAR	ZERO		ZERO		ZERO		ZERO
+
+        MBCSET	ZERO		ZERO		ZERO		ZERO
+
+        CSET	ZERO		ZERO		ZERO		ZERO
+
+        STAR	ZERO		ZERO		ZERO		ZERO
+
+        QMARK	ZERO		ZERO		ZERO		ZERO
+
+        PLUS	p->left		p->right	ZERO		p->in
+
+        CAT	(p->is==ZERO)?	(q->is==ZERO)?	(p->is!=ZERO &&	p->in plus
+                p->left :	q->right :	q->is!=ZERO) ?	q->in plus
+                p->is##q->left	p->right##q->is	p->is##q->is : p->right##q->left
+                                                ZERO
+
+        OR	longest common	longest common	(do p->is and substrings common
+                leading		trailing	to q->is have same p->in and
+                (sub)sequence	(sub)sequence	q->in length and content) ?
+                of p->left	of p->right
+                and q->left	and q->right	p->is : NULL
+
+   If there's anything else we recognize in the tree, all four sequences get set
+   to zero-length sequences.  If there's something we don't recognize in the
+   tree, we just return a zero-length sequence.
+
+   Break ties in favor of infrequent letters (choosing 'zzz' in preference to
+   'aaa')?
+
+   And ... is it here or someplace that we might ponder "optimizations" such as
+        egrep 'psi|epsilon'	->	egrep 'psi'
+        egrep 'pepsi|epsilon'	->	egrep 'epsi'
+                                        (Yes, we now find "epsi" as a "string
+                                        that must occur", but we might also
+                                        simplify the *entire* r.e. being sought)
+        grep '[c]'		->	grep 'c'
+        grep '(ab|a)b'		->	grep 'ab'
+        grep 'ab*'		->	grep 'a'
+        grep 'a*b'		->	grep 'b'
+
+   There are several issues:
+
+   Is optimization easy (enough)?
+
+   Does optimization actually accomplish anything,
+   or is the automaton you get from "psi|epsilon" (for example)
+   the same as the one you get from "psi" (for example)?
+
+   Are optimizable r.e.'s likely to be used in real-life situations
+   (something like 'ab*' is probably unlikely; something like is
+   'psi|epsilon' is likelier)?  */
+
+static char *
+icatalloc (char *old, char const *new)
+{
+  idx_t newsize = strlen (new);
+  if (newsize == 0)
+    return old;
+  idx_t oldsize = strlen (old);
+  char *result = xirealloc (old, oldsize + newsize + 1);
+  memcpy (result + oldsize, new, newsize + 1);
+  return result;
+}
+
+static void
+freelist (char **cpp)
+{
+  while (*cpp)
+    free (*cpp++);
+}
+
+static char **
+enlistnew (char **cpp, char *new)
+{
+  /* Is there already something in the list that's new (or longer)?  */
+  idx_t i;
+  for (i = 0; cpp[i] != NULL; i++)
+    if (strstr (cpp[i], new) != NULL)
+      {
+        free (new);
+        return cpp;
+      }
+  /* Eliminate any obsoleted strings.  */
+  for (idx_t j = 0; cpp[j] != NULL; )
+    if (strstr (new, cpp[j]) == NULL)
+      ++j;
+    else
+      {
+        free (cpp[j]);
+        if (--i == j)
+          break;
+        cpp[j] = cpp[i];
+        cpp[i] = NULL;
+      }
+  /* Add the new string.  */
+  cpp = xreallocarray (cpp, i + 2, sizeof *cpp);
+  cpp[i] = new;
+  cpp[i + 1] = NULL;
+  return cpp;
+}
+
+static char **
+enlist (char **cpp, char const *str, idx_t len)
+{
+  return enlistnew (cpp, ximemdup0 (str, len));
+}
+
+/* Given pointers to two strings, return a pointer to an allocated
+   list of their distinct common substrings.  */
+static char **
+comsubs (char *left, char const *right)
+{
+  char **cpp = xzalloc (sizeof *cpp);
+
+  for (char *lcp = left; *lcp != '\0'; lcp++)
+    {
+      idx_t len = 0;
+      char *rcp = strchr (right, *lcp);
+      while (rcp != NULL)
+        {
+          idx_t i;
+          for (i = 1; lcp[i] != '\0' && lcp[i] == rcp[i]; ++i)
+            continue;
+          if (i > len)
+            len = i;
+          rcp = strchr (rcp + 1, *lcp);
+        }
+      if (len != 0)
+        cpp = enlist (cpp, lcp, len);
+    }
+  return cpp;
+}
+
+static char **
+addlists (char **old, char **new)
+{
+  for (; *new; new++)
+    old = enlistnew (old, xstrdup (*new));
+  return old;
+}
+
+/* Given two lists of substrings, return a new list giving substrings
+   common to both.  */
+static char **
+inboth (char **left, char **right)
+{
+  char **both = xzalloc (sizeof *both);
+
+  for (idx_t lnum = 0; left[lnum] != NULL; lnum++)
+    {
+      for (idx_t rnum = 0; right[rnum] != NULL; rnum++)
+        {
+          char **temp = comsubs (left[lnum], right[rnum]);
+          both = addlists (both, temp);
+          freelist (temp);
+          free (temp);
+        }
+    }
+  return both;
+}
+
+typedef struct must must;
+
+struct must
+{
+  char **in;
+  char *left;
+  char *right;
+  char *is;
+  bool begline;
+  bool endline;
+  must *prev;
+};
+
+static must *
+allocmust (must *mp, idx_t size)
+{
+  must *new_mp = xmalloc (sizeof *new_mp);
+  new_mp->in = xzalloc (sizeof *new_mp->in);
+  new_mp->left = xizalloc (size);
+  new_mp->right = xizalloc (size);
+  new_mp->is = xizalloc (size);
+  new_mp->begline = false;
+  new_mp->endline = false;
+  new_mp->prev = mp;
+  return new_mp;
+}
+
+static void
+resetmust (must *mp)
+{
+  freelist (mp->in);
+  mp->in[0] = NULL;
+  mp->left[0] = mp->right[0] = mp->is[0] = '\0';
+  mp->begline = false;
+  mp->endline = false;
+}
+
+static void
+freemust (must *mp)
+{
+  freelist (mp->in);
+  free (mp->in);
+  free (mp->left);
+  free (mp->right);
+  free (mp->is);
+  free (mp);
+}
+
+struct dfamust *
+dfamust (struct dfa const *d)
+{
+  must *mp = NULL;
+  char const *result = "";
+  bool exact = false;
+  bool begline = false;
+  bool endline = false;
+  bool need_begline = false;
+  bool need_endline = false;
+  bool case_fold_unibyte = d->syntax.case_fold & !d->localeinfo.multibyte;
+
+  for (idx_t ri = 1; ri + 1 < d->tindex; ri++)
+    {
+      token t = d->tokens[ri];
+      switch (t)
+        {
+        case BEGLINE:
+          mp = allocmust (mp, 2);
+          mp->begline = true;
+          need_begline = true;
+          break;
+        case ENDLINE:
+          mp = allocmust (mp, 2);
+          mp->endline = true;
+          need_endline = true;
+          break;
+        case LPAREN:
+        case RPAREN:
+          assert (!"neither LPAREN nor RPAREN may appear here");
+
+        case EMPTY:
+        case BEGWORD:
+        case ENDWORD:
+        case LIMWORD:
+        case NOTLIMWORD:
+        case BACKREF:
+        case ANYCHAR:
+        case MBCSET:
+          mp = allocmust (mp, 2);
+          break;
+
+        case STAR:
+        case QMARK:
+          assume_nonnull (mp);
+          resetmust (mp);
+          break;
+
+        case OR:
+          {
+            char **new;
+            must *rmp = mp;
+            assume_nonnull (rmp);
+            must *lmp = mp = mp->prev;
+            assume_nonnull (lmp);
+            idx_t j, ln, rn, n;
+
+            /* Guaranteed to be.  Unlikely, but ...  */
+            if (streq (lmp->is, rmp->is))
+              {
+                lmp->begline &= rmp->begline;
+                lmp->endline &= rmp->endline;
+              }
+            else
+              {
+                lmp->is[0] = '\0';
+                lmp->begline = false;
+                lmp->endline = false;
+              }
+            /* Left side--easy */
+            idx_t i = 0;
+            while (lmp->left[i] != '\0' && lmp->left[i] == rmp->left[i])
+              ++i;
+            lmp->left[i] = '\0';
+            /* Right side */
+            ln = strlen (lmp->right);
+            rn = strlen (rmp->right);
+            n = ln;
+            if (n > rn)
+              n = rn;
+            for (i = 0; i < n; ++i)
+              if (lmp->right[ln - i - 1] != rmp->right[rn - i - 1])
+                break;
+            for (j = 0; j < i; ++j)
+              lmp->right[j] = lmp->right[(ln - i) + j];
+            lmp->right[j] = '\0';
+            new = inboth (lmp->in, rmp->in);
+            freelist (lmp->in);
+            free (lmp->in);
+            lmp->in = new;
+            freemust (rmp);
+          }
+          break;
+
+        case PLUS:
+          assume_nonnull (mp);
+          mp->is[0] = '\0';
+          break;
+
+        case END:
+          assume_nonnull (mp);
+          assert (!mp->prev);
+          for (idx_t i = 0; mp->in[i] != NULL; i++)
+            if (strlen (mp->in[i]) > strlen (result))
+              result = mp->in[i];
+          if (streq (result, mp->is))
+            {
+              if ((!need_begline || mp->begline) && (!need_endline
+                                                     || mp->endline))
+                exact = true;
+              begline = mp->begline;
+              endline = mp->endline;
+            }
+          goto done;
+
+        case CAT:
+          {
+            must *rmp = mp;
+            assume_nonnull (rmp);
+            must *lmp = mp = mp->prev;
+            assume_nonnull (lmp);
+
+            /* In.  Everything in left, plus everything in
+               right, plus concatenation of
+               left's right and right's left.  */
+            lmp->in = addlists (lmp->in, rmp->in);
+            if (lmp->right[0] != '\0' && rmp->left[0] != '\0')
+              {
+                idx_t lrlen = strlen (lmp->right);
+                idx_t rllen = strlen (rmp->left);
+                char *tp = ximalloc (lrlen + rllen + 1);
+                memcpy (tp + lrlen, rmp->left, rllen + 1);
+                memcpy (tp, lmp->right, lrlen);
+                lmp->in = enlistnew (lmp->in, tp);
+              }
+            /* Left-hand */
+            if (lmp->is[0] != '\0')
+              lmp->left = icatalloc (lmp->left, rmp->left);
+            /* Right-hand */
+            if (rmp->is[0] == '\0')
+              lmp->right[0] = '\0';
+            lmp->right = icatalloc (lmp->right, rmp->right);
+            /* Guaranteed to be */
+            if ((lmp->is[0] != '\0' || lmp->begline)
+                && (rmp->is[0] != '\0' || rmp->endline))
+              {
+                lmp->is = icatalloc (lmp->is, rmp->is);
+                lmp->endline = rmp->endline;
+              }
+            else
+              {
+                lmp->is[0] = '\0';
+                lmp->begline = false;
+                lmp->endline = false;
+              }
+            freemust (rmp);
+          }
+          break;
+
+        case '\0':
+          /* Not on *my* shift.  */
+          goto done;
+
+        default:
+          if (CSET <= t)
+            {
+              /* If T is a singleton, or if case-folding in a unibyte
+                 locale and T's members all case-fold to the same char,
+                 convert T to one of its members.  Otherwise, do
+                 nothing further with T.  */
+              charclass *ccl = &d->charclasses[t - CSET];
+              int j;
+              for (j = 0; j < NOTCHAR; j++)
+                if (tstbit (j, ccl))
+                  break;
+              if (! (j < NOTCHAR))
+                {
+                  mp = allocmust (mp, 2);
+                  break;
+                }
+              t = j;
+              while (++j < NOTCHAR)
+                if (tstbit (j, ccl)
+                    && ! (case_fold_unibyte
+                          && toupper (j) == toupper (t)))
+                  break;
+              if (j < NOTCHAR)
+                {
+                  mp = allocmust (mp, 2);
+                  break;
+                }
+            }
+
+          idx_t rj = ri + 2;
+          if (d->tokens[ri + 1] == CAT)
+            {
+              for (; rj < d->tindex - 1; rj += 2)
+                {
+                  if ((rj != ri && (d->tokens[rj] <= 0
+                                    || NOTCHAR <= d->tokens[rj]))
+                      || d->tokens[rj + 1] != CAT)
+                    break;
+                }
+            }
+          mp = allocmust (mp, ((rj - ri) >> 1) + 1);
+          mp->is[0] = mp->left[0] = mp->right[0]
+            = case_fold_unibyte ? toupper (t) : t;
+
+          idx_t i;
+          for (i = 1; ri + 2 < rj; i++)
+            {
+              ri += 2;
+              t = d->tokens[ri];
+              mp->is[i] = mp->left[i] = mp->right[i]
+                = case_fold_unibyte ? toupper (t) : t;
+            }
+          mp->is[i] = mp->left[i] = mp->right[i] = '\0';
+          mp->in = enlist (mp->in, mp->is, i);
+          break;
+        }
+    }
+ done:;
+
+  struct dfamust *dm = NULL;
+  if (*result)
+    {
+      dm = xmalloc (FLEXSIZEOF (struct dfamust, must, strlen (result) + 1));
+      dm->exact = exact;
+      dm->begline = begline;
+      dm->endline = endline;
+      strcpy (dm->must, result);
+    }
+
+  while (mp)
+    {
+      must *prev = mp->prev;
+      freemust (mp);
+      mp = prev;
+    }
+
+  return dm;
+}
+
+void
+dfamustfree (struct dfamust *dm)
+{
+  free (dm);
+}
+
+struct dfa *
+dfaalloc (void)
+{
+  return xmalloc (sizeof (struct dfa));
+}
+
+/* Initialize DFA.  */
+void
+dfasyntax (struct dfa *dfa, struct localeinfo const *linfo,
+           reg_syntax_t bits, int dfaopts)
+{
+  memset (dfa, 0, offsetof (struct dfa, dfaexec));
+  dfa->dfaexec = linfo->multibyte ? dfaexec_mb : dfaexec_sb;
+  dfa->localeinfo = *linfo;
+
+  dfa->fast = !dfa->localeinfo.multibyte;
+
+  dfa->canychar = -1;
+  dfa->syntax.syntax_bits_set = true;
+  dfa->syntax.case_fold = (bits & RE_ICASE) != 0;
+  dfa->syntax.anchor = (dfaopts & DFA_ANCHOR) != 0;
+  dfa->syntax.eolbyte = dfaopts & DFA_EOL_NUL ? '\0' : '\n';
+  dfa->syntax.syntax_bits = bits;
+
+  for (int i = CHAR_MIN; i <= CHAR_MAX; ++i)
+    {
+      unsigned char uc = i;
+
+      dfa->syntax.sbit[uc] = char_context (dfa, uc);
+      switch (dfa->syntax.sbit[uc])
+        {
+        case CTX_LETTER:
+          setbit (uc, &dfa->syntax.letters);
+          break;
+        case CTX_NEWLINE:
+          setbit (uc, &dfa->syntax.newline);
+          break;
+        }
+
+      /* POSIX requires that the five bytes in "\n\r./" (including the
+         terminating NUL) cannot occur inside a multibyte character.  */
+      dfa->syntax.never_trail[uc] = (dfa->localeinfo.using_utf8
+                                     ? (uc & 0xc0) != 0x80
+                                     : strchr ("\n\r./", uc) != NULL);
+    }
+}
+
+/* Initialize TO by copying FROM's syntax settings.  */
+void
+dfacopysyntax (struct dfa *to, struct dfa const *from)
+{
+  memset (to, 0, offsetof (struct dfa, syntax));
+  to->canychar = -1;
+  to->fast = from->fast;
+  to->syntax = from->syntax;
+  to->dfaexec = from->dfaexec;
+  to->localeinfo = from->localeinfo;
+}
+
+/* vim:set shiftwidth=2: */
diff --git a/src/grep/lib/dfa.h b/src/grep/lib/dfa.h
new file mode 100644
index 0000000..edc39dc
--- /dev/null
+++ b/src/grep/lib/dfa.h
@@ -0,0 +1,154 @@
+/* dfa.h - declarations for GNU deterministic regexp compiler
+   Copyright (C) 1988, 1998, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc.,
+   51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA */
+
+/* Written June, 1988 by Mike Haertel */
+
+#ifndef DFA_H_
+#define DFA_H_
+
+#include <regex.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct localeinfo; /* See localeinfo.h.  */
+
+/* Element of a list of strings, at least one of which is known to
+   appear in any R.E. matching the DFA. */
+struct dfamust
+{
+  bool exact;
+  bool begline;
+  bool endline;
+  char must[FLEXIBLE_ARRAY_MEMBER];
+};
+
+/* The dfa structure. It is completely opaque. */
+struct dfa;
+
+/* Needed when Gnulib is not used.  */
+#ifndef _GL_ATTRIBUTE_MALLOC
+# define _GL_ATTRIBUTE_MALLOC
+# define _GL_ATTRIBUTE_DEALLOC_FREE
+# define _GL_ATTRIBUTE_RETURNS_NONNULL
+#endif
+
+/* Entry points. */
+
+/* Allocate a struct dfa.  The struct dfa is completely opaque.
+   It should be initialized via dfasyntax or dfacopysyntax before other use.
+   The returned pointer should be passed directly to free() after
+   calling dfafree() on it. */
+extern struct dfa *dfaalloc (void)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_RETURNS_NONNULL;
+
+/* DFA options that can be ORed together, for dfasyntax's 4th arg.  */
+enum
+  {
+    /* ^ and $ match only the start and end of data, and do not match
+       end-of-line within data.  This is always false for grep, but
+       possibly true for other apps.  */
+    DFA_ANCHOR = 1 << 0,
+
+    /* '\0' in data is end-of-line, instead of the traditional '\n'.  */
+    DFA_EOL_NUL = 1 << 1
+  };
+
+/* Initialize or reinitialize a DFA.  The arguments are:
+   1. The DFA to operate on.
+   2. Information about the current locale.
+   3. Syntax bits described in regex.h.
+   4. Additional DFA options described above.  */
+extern void dfasyntax (struct dfa *, struct localeinfo const *,
+                       reg_syntax_t, int);
+
+/* Initialize or reinitialize a DFA from an already-initialized DFA.  */
+extern void dfacopysyntax (struct dfa *, struct dfa const *);
+
+/* Parse the given string of given length into the given struct dfa.  */
+extern void dfaparse (char const *, ptrdiff_t, struct dfa *);
+
+struct dfamust;
+
+/* Free the storage held by the components of a struct dfamust. */
+extern void dfamustfree (struct dfamust *);
+
+/* Allocate and return a struct dfamust from a struct dfa that was
+   initialized by dfaparse and not yet given to dfacomp.  */
+extern struct dfamust *dfamust (struct dfa const *)
+  _GL_ATTRIBUTE_DEALLOC (dfamustfree, 1);
+
+/* Compile the given string of the given length into the given struct dfa.
+   The last argument says whether to build a searching or an exact matcher.
+   A null first argument means the struct dfa has already been
+   initialized by dfaparse; the second argument is ignored.  */
+extern void dfacomp (char const *, ptrdiff_t, struct dfa *, bool);
+
+/* Search through a buffer looking for a match to the given struct dfa.
+   Find the first occurrence of a string matching the regexp in the
+   buffer, and the shortest possible version thereof.  Return a pointer to
+   the first character after the match, or NULL if none is found.  BEGIN
+   points to the beginning of the buffer, and END points to the first byte
+   after its end.  Note however that we store a sentinel byte (usually
+   newline) in *END, so the actual buffer must be one byte longer.
+   When ALLOW_NL is true, newlines may appear in the matching string.
+   If COUNT is non-NULL, increment *COUNT once for each newline processed.
+   Finally, if BACKREF is non-NULL set *BACKREF to indicate whether we
+   encountered a back-reference.  The caller can use this to decide
+   whether to fall back on a backtracking matcher.  */
+extern char *dfaexec (struct dfa *d, char const *begin, char *end,
+                      bool allow_nl, ptrdiff_t *count, bool *backref);
+
+/* Return a superset for D.  The superset matches everything that D
+   matches, along with some other strings (though the latter should be
+   rare, for efficiency reasons).  Return a null pointer if no useful
+   superset is available.  */
+extern struct dfa *dfasuperset (struct dfa const *d) _GL_ATTRIBUTE_PURE;
+
+/* The DFA is likely to be fast.  */
+extern bool dfaisfast (struct dfa const *) _GL_ATTRIBUTE_PURE;
+
+/* Return true if every construct in D is supported by this DFA matcher.  */
+extern bool dfasupported (struct dfa const *) _GL_ATTRIBUTE_PURE;
+
+/* Free the storage held by the components of a struct dfa. */
+extern void dfafree (struct dfa *);
+
+/* Error handling. */
+
+/* dfawarn() is called by the regexp routines whenever a regex is compiled
+   that likely doesn't do what the user wanted.  It takes a single
+   argument, a NUL-terminated string describing the situation.  The user
+   must supply a dfawarn.  */
+extern void dfawarn (const char *);
+
+/* dfaerror() is called by the regexp routines whenever an error occurs.  It
+   takes a single argument, a NUL-terminated string describing the error.
+   The user must supply a dfaerror.  */
+extern _Noreturn void dfaerror (const char *);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* dfa.h */
diff --git a/src/grep/lib/dirent-private.h b/src/grep/lib/dirent-private.h
new file mode 100644
index 0000000..81f48d7
--- /dev/null
+++ b/src/grep/lib/dirent-private.h
@@ -0,0 +1,44 @@
+/* Private details of the DIR type.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _DIRENT_PRIVATE_H
+#define _DIRENT_PRIVATE_H 1
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+/* Don't assume that UNICODE is not defined.  */
+#undef WIN32_FIND_DATA
+#define WIN32_FIND_DATA WIN32_FIND_DATAA
+
+struct gl_directory
+{
+  /* Status, or error code to produce in next readdir() call.
+     -2 means the end of the directory is already reached,
+     -1 means the entry was already filled by FindFirstFile,
+     0 means the entry needs to be filled using FindNextFile.
+     A positive value is an error code.  */
+  int status;
+  /* Handle, reading the directory, at current position.  */
+  HANDLE current;
+  /* Found directory entry.  */
+  WIN32_FIND_DATA entry;
+  /* Argument to pass to FindFirstFile.  It consists of the absolutized
+     directory name, followed by a directory separator and the wildcards.  */
+  char dir_name_mask[1];
+};
+
+#endif /* _DIRENT_PRIVATE_H */
diff --git a/src/grep/lib/dirent.in.h b/src/grep/lib/dirent.in.h
new file mode 100644
index 0000000..5775edf
--- /dev/null
+++ b/src/grep/lib/dirent.in.h
@@ -0,0 +1,299 @@
+/* A GNU-like <dirent.h>.
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _@GUARD_PREFIX@_DIRENT_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard.  */
+#if @HAVE_DIRENT_H@
+# @INCLUDE_NEXT@ @NEXT_DIRENT_H@
+#endif
+
+#ifndef _@GUARD_PREFIX@_DIRENT_H
+#define _@GUARD_PREFIX@_DIRENT_H
+
+/* Get ino_t.  Needed on some systems, including glibc 2.8.  */
+#include <sys/types.h>
+
+#if !@HAVE_DIRENT_H@
+/* Define types DIR and 'struct dirent'.  */
+# if !GNULIB_defined_struct_dirent
+struct dirent
+{
+  char d_type;
+  char d_name[1];
+};
+/* Possible values for 'd_type'.  */
+#  define DT_UNKNOWN 0
+#  define DT_FIFO    1          /* FIFO */
+#  define DT_CHR     2          /* character device */
+#  define DT_DIR     4          /* directory */
+#  define DT_BLK     6          /* block device */
+#  define DT_REG     8          /* regular file */
+#  define DT_LNK    10          /* symbolic link */
+#  define DT_SOCK   12          /* socket */
+#  define DT_WHT    14          /* whiteout */
+typedef struct gl_directory DIR;
+#  define GNULIB_defined_struct_dirent 1
+# endif
+#endif
+
+/* The __attribute__ feature is available in gcc versions 2.5 and later.
+   The attribute __pure__ was added in gcc 2.96.  */
+#ifndef _GL_ATTRIBUTE_PURE
+# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96) || defined __clang__
+#  define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+# else
+#  define _GL_ATTRIBUTE_PURE /* empty */
+# endif
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+
+/* Declare overridden functions.  */
+
+#if @GNULIB_CLOSEDIR@
+# if @REPLACE_CLOSEDIR@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef closedir
+#   define closedir rpl_closedir
+#   define GNULIB_defined_closedir 1
+#  endif
+_GL_FUNCDECL_RPL (closedir, int, (DIR *dirp) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (closedir, int, (DIR *dirp));
+# else
+#  if !@HAVE_CLOSEDIR@
+_GL_FUNCDECL_SYS (closedir, int, (DIR *dirp) _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (closedir, int, (DIR *dirp));
+# endif
+_GL_CXXALIASWARN (closedir);
+#elif defined GNULIB_POSIXCHECK
+# undef closedir
+# if HAVE_RAW_DECL_CLOSEDIR
+_GL_WARN_ON_USE (closedir, "closedir is not portable - "
+                 "use gnulib module closedir for portability");
+# endif
+#endif
+
+#if @GNULIB_OPENDIR@
+# if @REPLACE_OPENDIR@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef opendir
+#   define opendir rpl_opendir
+#   define GNULIB_defined_opendir 1
+#  endif
+_GL_FUNCDECL_RPL (opendir, DIR *,
+                  (const char *dir_name)
+                  _GL_ARG_NONNULL ((1))
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC (closedir, 1));
+_GL_CXXALIAS_RPL (opendir, DIR *, (const char *dir_name));
+# else
+#  if !@HAVE_OPENDIR@ || __GNUC__ >= 11
+_GL_FUNCDECL_SYS (opendir, DIR *,
+                  (const char *dir_name)
+                  _GL_ARG_NONNULL ((1))
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC (closedir, 1));
+#  endif
+_GL_CXXALIAS_SYS (opendir, DIR *, (const char *dir_name));
+# endif
+_GL_CXXALIASWARN (opendir);
+#else
+# if @GNULIB_CLOSEDIR@ && __GNUC__ >= 11 && !defined opendir
+/* For -Wmismatched-dealloc: Associate opendir with closedir or
+   rpl_closedir.  */
+_GL_FUNCDECL_SYS (opendir, DIR *,
+                  (const char *dir_name)
+                  _GL_ARG_NONNULL ((1))
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC (closedir, 1));
+# endif
+# if defined GNULIB_POSIXCHECK
+#  undef opendir
+#  if HAVE_RAW_DECL_OPENDIR
+_GL_WARN_ON_USE (opendir, "opendir is not portable - "
+                 "use gnulib module opendir for portability");
+#  endif
+# endif
+#endif
+
+#if @GNULIB_READDIR@
+# if !@HAVE_READDIR@
+_GL_FUNCDECL_SYS (readdir, struct dirent *, (DIR *dirp) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (readdir, struct dirent *, (DIR *dirp));
+_GL_CXXALIASWARN (readdir);
+#elif defined GNULIB_POSIXCHECK
+# undef readdir
+# if HAVE_RAW_DECL_READDIR
+_GL_WARN_ON_USE (readdir, "readdir is not portable - "
+                 "use gnulib module readdir for portability");
+# endif
+#endif
+
+#if @GNULIB_REWINDDIR@
+# if !@HAVE_REWINDDIR@
+_GL_FUNCDECL_SYS (rewinddir, void, (DIR *dirp) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (rewinddir, void, (DIR *dirp));
+_GL_CXXALIASWARN (rewinddir);
+#elif defined GNULIB_POSIXCHECK
+# undef rewinddir
+# if HAVE_RAW_DECL_REWINDDIR
+_GL_WARN_ON_USE (rewinddir, "rewinddir is not portable - "
+                 "use gnulib module rewinddir for portability");
+# endif
+#endif
+
+#if @GNULIB_DIRFD@
+/* Return the file descriptor associated with the given directory stream,
+   or -1 if none exists.  */
+# if @REPLACE_DIRFD@
+/* On kLIBC, dirfd() is a macro that does not work.  Undefine it.  */
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE) || defined dirfd
+#   undef dirfd
+#   define dirfd rpl_dirfd
+#  endif
+_GL_FUNCDECL_RPL (dirfd, int, (DIR *) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (dirfd, int, (DIR *));
+
+#  ifdef __KLIBC__
+/* Gnulib internal hooks needed to maintain the dirfd metadata.  */
+_GL_EXTERN_C int _gl_register_dirp_fd (int fd, DIR *dirp)
+     _GL_ARG_NONNULL ((2));
+_GL_EXTERN_C void _gl_unregister_dirp_fd (int fd);
+#  endif
+# else
+#  if defined __cplusplus && defined GNULIB_NAMESPACE && defined dirfd
+    /* dirfd is defined as a macro and not as a function.
+       Turn it into a function and get rid of the macro.  */
+static inline int (dirfd) (DIR *dp) { return dirfd (dp); }
+#   undef dirfd
+#  endif
+#  if !(@HAVE_DECL_DIRFD@ || defined dirfd)
+_GL_FUNCDECL_SYS (dirfd, int, (DIR *) _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (dirfd, int, (DIR *));
+# endif
+_GL_CXXALIASWARN (dirfd);
+#elif defined GNULIB_POSIXCHECK
+# undef dirfd
+# if HAVE_RAW_DECL_DIRFD
+_GL_WARN_ON_USE (dirfd, "dirfd is unportable - "
+                 "use gnulib module dirfd for portability");
+# endif
+#endif
+
+#if @GNULIB_FDOPENDIR@
+/* Open a directory stream visiting the given directory file
+   descriptor.  Return NULL and set errno if fd is not visiting a
+   directory.  On success, this function consumes fd (it will be
+   implicitly closed either by this function or by a subsequent
+   closedir).  */
+# if @REPLACE_FDOPENDIR@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fdopendir
+#   define fdopendir rpl_fdopendir
+#  endif
+_GL_FUNCDECL_RPL (fdopendir, DIR *,
+                  (int fd)
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC (closedir, 1));
+_GL_CXXALIAS_RPL (fdopendir, DIR *, (int fd));
+# else
+#  if !@HAVE_FDOPENDIR@ || !@HAVE_DECL_FDOPENDIR@ || __GNUC__ >= 11
+_GL_FUNCDECL_SYS (fdopendir, DIR *,
+                  (int fd)
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC (closedir, 1));
+#  endif
+_GL_CXXALIAS_SYS (fdopendir, DIR *, (int fd));
+# endif
+_GL_CXXALIASWARN (fdopendir);
+#else
+# if @GNULIB_CLOSEDIR@ && __GNUC__ >= 11 && !defined fdopendir
+/* For -Wmismatched-dealloc: Associate fdopendir with closedir or
+   rpl_closedir.  */
+_GL_FUNCDECL_SYS (fdopendir, DIR *,
+                  (int fd)
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC (closedir, 1));
+# endif
+# if defined GNULIB_POSIXCHECK
+#  undef fdopendir
+#  if HAVE_RAW_DECL_FDOPENDIR
+_GL_WARN_ON_USE (fdopendir, "fdopendir is unportable - "
+                 "use gnulib module fdopendir for portability");
+#  endif
+# endif
+#endif
+
+#if @GNULIB_SCANDIR@
+/* Scan the directory DIR, calling FILTER on each directory entry.
+   Entries for which FILTER returns nonzero are individually malloc'd,
+   sorted using qsort with CMP, and collected in a malloc'd array in
+   *NAMELIST.  Returns the number of entries selected, or -1 on error.  */
+# if !@HAVE_SCANDIR@
+_GL_FUNCDECL_SYS (scandir, int,
+                  (const char *dir, struct dirent ***namelist,
+                   int (*filter) (const struct dirent *),
+                   int (*cmp) (const struct dirent **, const struct dirent **))
+                  _GL_ARG_NONNULL ((1, 2, 4)));
+# endif
+/* Need to cast, because on glibc systems, the fourth parameter is
+                        int (*cmp) (const void *, const void *).  */
+_GL_CXXALIAS_SYS_CAST (scandir, int,
+                       (const char *dir, struct dirent ***namelist,
+                        int (*filter) (const struct dirent *),
+                        int (*cmp) (const struct dirent **, const struct dirent **)));
+_GL_CXXALIASWARN (scandir);
+#elif defined GNULIB_POSIXCHECK
+# undef scandir
+# if HAVE_RAW_DECL_SCANDIR
+_GL_WARN_ON_USE (scandir, "scandir is unportable - "
+                 "use gnulib module scandir for portability");
+# endif
+#endif
+
+#if @GNULIB_ALPHASORT@
+/* Compare two 'struct dirent' entries alphabetically.  */
+# if !@HAVE_ALPHASORT@
+_GL_FUNCDECL_SYS (alphasort, int,
+                  (const struct dirent **, const struct dirent **)
+                  _GL_ATTRIBUTE_PURE
+                  _GL_ARG_NONNULL ((1, 2)));
+# endif
+/* Need to cast, because on glibc systems, the parameters are
+                       (const void *, const void *).  */
+_GL_CXXALIAS_SYS_CAST (alphasort, int,
+                       (const struct dirent **, const struct dirent **));
+_GL_CXXALIASWARN (alphasort);
+#elif defined GNULIB_POSIXCHECK
+# undef alphasort
+# if HAVE_RAW_DECL_ALPHASORT
+_GL_WARN_ON_USE (alphasort, "alphasort is unportable - "
+                 "use gnulib module alphasort for portability");
+# endif
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_DIRENT_H */
+#endif /* _@GUARD_PREFIX@_DIRENT_H */
diff --git a/src/grep/lib/dirfd.c b/src/grep/lib/dirfd.c
new file mode 100644
index 0000000..640cb4f
--- /dev/null
+++ b/src/grep/lib/dirfd.c
@@ -0,0 +1,98 @@
+/* dirfd.c -- return the file descriptor associated with an open DIR*
+
+   Copyright (C) 2001, 2006, 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering. */
+
+#include <config.h>
+
+#include <dirent.h>
+#include <errno.h>
+
+#ifdef __KLIBC__
+# include <stdlib.h>
+# include <io.h>
+
+static struct dirp_fd_list
+{
+  DIR *dirp;
+  int fd;
+  struct dirp_fd_list *next;
+} *dirp_fd_start = NULL;
+
+/* Register fd associated with dirp to dirp_fd_list. */
+int
+_gl_register_dirp_fd (int fd, DIR *dirp)
+{
+  struct dirp_fd_list *new_dirp_fd = malloc (sizeof *new_dirp_fd);
+  if (!new_dirp_fd)
+    return -1;
+
+  new_dirp_fd->dirp = dirp;
+  new_dirp_fd->fd = fd;
+  new_dirp_fd->next = dirp_fd_start;
+
+  dirp_fd_start = new_dirp_fd;
+
+  return 0;
+}
+
+/* Unregister fd from dirp_fd_list with closing it */
+void
+_gl_unregister_dirp_fd (int fd)
+{
+  struct dirp_fd_list *dirp_fd;
+  struct dirp_fd_list *dirp_fd_prev;
+
+  for (dirp_fd_prev = NULL, dirp_fd = dirp_fd_start; dirp_fd;
+       dirp_fd_prev = dirp_fd, dirp_fd = dirp_fd->next)
+    {
+      if (dirp_fd->fd == fd)
+        {
+          if (dirp_fd_prev)
+            dirp_fd_prev->next = dirp_fd->next;
+          else  /* dirp_fd == dirp_fd_start */
+            dirp_fd_start = dirp_fd_start->next;
+
+          close (fd);
+          free (dirp_fd);
+          break;
+        }
+    }
+}
+#endif
+
+int
+dirfd (DIR *dir_p)
+{
+  int fd = DIR_TO_FD (dir_p);
+  if (fd == -1)
+#ifndef __KLIBC__
+    errno = ENOTSUP;
+#else
+    {
+      struct dirp_fd_list *dirp_fd;
+
+      for (dirp_fd = dirp_fd_start; dirp_fd; dirp_fd = dirp_fd->next)
+        if (dirp_fd->dirp == dir_p)
+          return dirp_fd->fd;
+
+      errno = EINVAL;
+    }
+#endif
+
+  return fd;
+}
diff --git a/src/grep/lib/dirname-lgpl.c b/src/grep/lib/dirname-lgpl.c
new file mode 100644
index 0000000..95f9c99
--- /dev/null
+++ b/src/grep/lib/dirname-lgpl.c
@@ -0,0 +1,86 @@
+/* dirname.c -- return all but the last element in a file name
+
+   Copyright (C) 1990, 1998, 2000-2001, 2003-2006, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "dirname.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+/* Return the length of the prefix of FILE that will be used by
+   dir_name.  If FILE is in the working directory, this returns zero
+   even though 'dir_name (FILE)' will return ".".  Works properly even
+   if there are trailing slashes (by effectively ignoring them).  */
+
+size_t
+dir_len (char const *file)
+{
+  size_t prefix_length = FILE_SYSTEM_PREFIX_LEN (file);
+  size_t length;
+
+  /* Advance prefix_length beyond important leading slashes.  */
+  prefix_length += (prefix_length != 0
+                    ? (FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
+                       && ISSLASH (file[prefix_length]))
+                    : (ISSLASH (file[0])
+                       ? ((DOUBLE_SLASH_IS_DISTINCT_ROOT
+                           && ISSLASH (file[1]) && ! ISSLASH (file[2])
+                           ? 2 : 1))
+                       : 0));
+
+  /* Strip the basename and any redundant slashes before it.  */
+  for (length = last_component (file) - file;
+       prefix_length < length; length--)
+    if (! ISSLASH (file[length - 1]))
+      break;
+  return length;
+}
+
+
+/* In general, we can't use the builtin 'dirname' function if available,
+   since it has different meanings in different environments.
+   In some environments the builtin 'dirname' modifies its argument.
+
+   Return the leading directories part of FILE, allocated with malloc.
+   Works properly even if there are trailing slashes (by effectively
+   ignoring them).  Return NULL on failure.
+
+   If lstat (FILE) would succeed, then { chdir (dir_name (FILE));
+   lstat (base_name (FILE)); } will access the same file.  Likewise,
+   if the sequence { chdir (dir_name (FILE));
+   rename (base_name (FILE), "foo"); } succeeds, you have renamed FILE
+   to "foo" in the same directory FILE was in.  */
+
+char *
+mdir_name (char const *file)
+{
+  size_t length = dir_len (file);
+  bool append_dot = (length == 0
+                     || (FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
+                         && length == FILE_SYSTEM_PREFIX_LEN (file)
+                         && file[2] != '\0' && ! ISSLASH (file[2])));
+  char *dir = malloc (length + append_dot + 1);
+  if (!dir)
+    return NULL;
+  memcpy (dir, file, length);
+  if (append_dot)
+    dir[length++] = '.';
+  dir[length] = '\0';
+  return dir;
+}
diff --git a/src/grep/lib/dirname.h b/src/grep/lib/dirname.h
new file mode 100644
index 0000000..25abc7b
--- /dev/null
+++ b/src/grep/lib/dirname.h
@@ -0,0 +1,54 @@
+/* Take file names apart into directory and base names.
+
+   Copyright (C) 1998, 2001, 2003-2006, 2009-2021 Free Software Foundation,
+   Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef DIRNAME_H_
+# define DIRNAME_H_ 1
+
+# include <stdbool.h>
+# include <stdlib.h>
+# include "filename.h"
+# include "basename-lgpl.h"
+
+# ifndef DIRECTORY_SEPARATOR
+#  define DIRECTORY_SEPARATOR '/'
+# endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+# if GNULIB_DIRNAME
+char *base_name (char const *file)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_RETURNS_NONNULL;
+char *dir_name (char const *file)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_RETURNS_NONNULL;
+# endif
+
+char *mdir_name (char const *file)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE;
+size_t dir_len (char const *file) _GL_ATTRIBUTE_PURE;
+
+bool strip_trailing_slashes (char *file);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* not DIRNAME_H_ */
diff --git a/src/grep/lib/dup-safer-flag.c b/src/grep/lib/dup-safer-flag.c
new file mode 100644
index 0000000..ec36a78
--- /dev/null
+++ b/src/grep/lib/dup-safer-flag.c
@@ -0,0 +1,54 @@
+/* Duplicate a file descriptor result, avoiding clobbering
+   STD{IN,OUT,ERR}_FILENO, with specific flags.
+
+   Copyright (C) 2001, 2004-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert and Eric Blake.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "unistd-safer.h"
+
+#include <fcntl.h>
+#include <unistd.h>
+
+/* Like dup, but do not return STDIN_FILENO, STDOUT_FILENO, or
+   STDERR_FILENO.  If FLAG contains O_CLOEXEC, behave like
+   fcntl(F_DUPFD_CLOEXEC) rather than fcntl(F_DUPFD).  */
+
+int
+dup_safer_flag (int fd, int flag)
+{
+#if defined(KMK_GREP) && defined(_MSC_VER)
+  int afd[STDERR_FILENO + 1];
+  int i;
+  for (i = 0; ; i++)
+    {
+      int fdNew = _dup(fd);
+      if (fdNew >= STDERR_FILENO + 1 || fdNew < 0)
+        {
+          while (i-- > 0)
+            close(afd[i]);
+          return fdNew;
+        }
+      afd[i] = fdNew;
+    }
+#else
+  return fcntl (fd, (flag & O_CLOEXEC) ? F_DUPFD_CLOEXEC : F_DUPFD,
+                STDERR_FILENO + 1);
+#endif
+}
diff --git a/src/grep/lib/dup-safer.c b/src/grep/lib/dup-safer.c
new file mode 100644
index 0000000..d8d3de3
--- /dev/null
+++ b/src/grep/lib/dup-safer.c
@@ -0,0 +1,50 @@
+/* Invoke dup, but avoid some glitches.
+
+   Copyright (C) 2001, 2004-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+#include <config.h>
+
+#include "unistd-safer.h"
+
+#include <fcntl.h>
+#include <unistd.h>
+
+/* Like dup, but do not return STDIN_FILENO, STDOUT_FILENO, or
+   STDERR_FILENO.  */
+
+int
+dup_safer (int fd)
+{
+#if defined(KMK_GREP) && defined(_MSC_VER)
+  int afd[STDERR_FILENO + 1];
+  int i;
+  for (i = 0; ; i++)
+    {
+      int fdNew = _dup(fd);
+      if (fdNew >= STDERR_FILENO + 1 || fdNew < 0)
+        {
+          while (i-- > 0)
+            close(afd[i]);
+          return fdNew;
+        }
+      afd[i] = fdNew;
+    }
+#else
+  return fcntl (fd, F_DUPFD, STDERR_FILENO + 1);
+#endif
+}
diff --git a/src/grep/lib/dup.c b/src/grep/lib/dup.c
new file mode 100644
index 0000000..c3c727a
--- /dev/null
+++ b/src/grep/lib/dup.c
@@ -0,0 +1,92 @@
+/* Duplicate an open file descriptor.
+
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+#include <errno.h>
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+# include "msvc-inval.h"
+#endif
+
+#undef dup
+
+#if defined _WIN32 && !defined __CYGWIN__
+# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+static int
+dup_nothrow (int fd)
+{
+  int result;
+
+  TRY_MSVC_INVAL
+    {
+      result = _dup (fd);
+    }
+  CATCH_MSVC_INVAL
+    {
+      result = -1;
+      errno = EBADF;
+    }
+  DONE_MSVC_INVAL;
+
+  return result;
+}
+# else
+#  define dup_nothrow _dup
+# endif
+#elif defined __KLIBC__
+# include <fcntl.h>
+# include <sys/stat.h>
+
+# include <InnoTekLIBC/backend.h>
+
+static int
+dup_nothrow (int fd)
+{
+  int dupfd;
+  struct stat sbuf;
+
+  dupfd = dup (fd);
+  if (dupfd == -1 && errno == ENOTSUP \
+      && !fstat (fd, &sbuf) && S_ISDIR (sbuf.st_mode))
+    {
+      char path[_MAX_PATH];
+
+      /* Get a path from fd */
+      if (!__libc_Back_ioFHToPath (fd, path, sizeof (path)))
+        dupfd = open (path, O_RDONLY);
+    }
+
+  return dupfd;
+}
+#else
+# define dup_nothrow dup
+#endif
+
+int
+rpl_dup (int fd)
+{
+  int result = dup_nothrow (fd);
+#if REPLACE_FCHDIR
+  if (result >= 0)
+    result = _gl_register_dup (fd, result);
+#endif
+  return result;
+}
diff --git a/src/grep/lib/dup2.c b/src/grep/lib/dup2.c
new file mode 100644
index 0000000..53e5552
--- /dev/null
+++ b/src/grep/lib/dup2.c
@@ -0,0 +1,189 @@
+/* Duplicate an open file descriptor to a specified file descriptor.
+
+   Copyright (C) 1999, 2004-2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Paul Eggert */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+#include <errno.h>
+#include <fcntl.h>
+
+#undef dup2
+
+#if defined _WIN32 && ! defined __CYGWIN__
+
+/* Get declarations of the native Windows API functions.  */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+
+# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+#  include "msvc-inval.h"
+# endif
+
+/* Get _get_osfhandle.  */
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+
+# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+static int
+dup2_nothrow (int fd, int desired_fd)
+{
+  int result;
+
+  TRY_MSVC_INVAL
+    {
+      result = _dup2 (fd, desired_fd);
+    }
+  CATCH_MSVC_INVAL
+    {
+      errno = EBADF;
+      result = -1;
+    }
+  DONE_MSVC_INVAL;
+
+  return result;
+}
+# else
+#  define dup2_nothrow _dup2
+# endif
+
+static int
+ms_windows_dup2 (int fd, int desired_fd)
+{
+  int result;
+
+  /* If fd is closed, mingw hangs on dup2 (fd, fd).  If fd is open,
+     dup2 (fd, fd) returns 0, but all further attempts to use fd in
+     future dup2 calls will hang.  */
+  if (fd == desired_fd)
+    {
+      if ((HANDLE) _get_osfhandle (fd) == INVALID_HANDLE_VALUE)
+        {
+          errno = EBADF;
+          return -1;
+        }
+      return fd;
+    }
+
+  /* Wine 1.0.1 return 0 when desired_fd is negative but not -1:
+     https://bugs.winehq.org/show_bug.cgi?id=21289 */
+  if (desired_fd < 0)
+    {
+      errno = EBADF;
+      return -1;
+    }
+
+  result = dup2_nothrow (fd, desired_fd);
+
+  if (result == 0)
+    result = desired_fd;
+
+  return result;
+}
+
+# define dup2 ms_windows_dup2
+
+#elif defined __KLIBC__
+
+# include <InnoTekLIBC/backend.h>
+
+static int
+klibc_dup2dirfd (int fd, int desired_fd)
+{
+  int tempfd;
+  int dupfd;
+
+  tempfd = open ("NUL", O_RDONLY);
+  if (tempfd == -1)
+    return -1;
+
+  if (tempfd == desired_fd)
+    {
+      close (tempfd);
+
+      char path[_MAX_PATH];
+      if (__libc_Back_ioFHToPath (fd, path, sizeof (path)))
+        return -1;
+
+      return open(path, O_RDONLY);
+    }
+
+  dupfd = klibc_dup2dirfd (fd, desired_fd);
+
+  close (tempfd);
+
+  return dupfd;
+}
+
+static int
+klibc_dup2 (int fd, int desired_fd)
+{
+  int dupfd;
+  struct stat sbuf;
+
+  dupfd = dup2 (fd, desired_fd);
+  if (dupfd == -1 && errno == ENOTSUP \
+      && !fstat (fd, &sbuf) && S_ISDIR (sbuf.st_mode))
+    {
+      close (desired_fd);
+
+      return klibc_dup2dirfd (fd, desired_fd);
+    }
+
+  return dupfd;
+}
+
+# define dup2 klibc_dup2
+#endif
+
+int
+rpl_dup2 (int fd, int desired_fd)
+{
+  int result;
+
+#ifdef F_GETFL
+  /* On Linux kernels 2.6.26-2.6.29, dup2 (fd, fd) returns -EBADF.
+     On Cygwin 1.5.x, dup2 (1, 1) returns 0.
+     On Cygwin 1.7.17, dup2 (1, -1) dumps core.
+     On Cygwin 1.7.25, dup2 (1, 256) can dump core.
+     On Haiku, dup2 (fd, fd) mistakenly clears FD_CLOEXEC.  */
+# if HAVE_SETDTABLESIZE
+  setdtablesize (desired_fd + 1);
+# endif
+  if (desired_fd < 0)
+    fd = desired_fd;
+  if (fd == desired_fd)
+    return fcntl (fd, F_GETFL) == -1 ? -1 : fd;
+#endif
+
+  result = dup2 (fd, desired_fd);
+
+  /* Correct an errno value on FreeBSD 6.1 and Cygwin 1.5.x.  */
+  if (result == -1 && errno == EMFILE)
+    errno = EBADF;
+#if REPLACE_FCHDIR
+  if (fd != desired_fd && result != -1)
+    result = _gl_register_dup (fd, result);
+#endif
+  return result;
+}
diff --git a/src/grep/lib/dynarray.h b/src/grep/lib/dynarray.h
new file mode 100644
index 0000000..ec64273
--- /dev/null
+++ b/src/grep/lib/dynarray.h
@@ -0,0 +1,284 @@
+/* Type-safe arrays which grow dynamically.
+   Copyright 2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert and Bruno Haible, 2021.  */
+
+#ifndef _GL_DYNARRAY_H
+#define _GL_DYNARRAY_H
+
+/* Before including this file, you need to define:
+
+   DYNARRAY_STRUCT
+      The struct tag of dynamic array to be defined.
+
+   DYNARRAY_ELEMENT
+      The type name of the element type.  Elements are copied
+      as if by memcpy, and can change address as the dynamic
+      array grows.
+
+   DYNARRAY_PREFIX
+      The prefix of the functions which are defined.
+
+   The following parameters are optional:
+
+   DYNARRAY_ELEMENT_FREE
+      DYNARRAY_ELEMENT_FREE (E) is evaluated to deallocate the
+      contents of elements. E is of type  DYNARRAY_ELEMENT *.
+
+   DYNARRAY_ELEMENT_INIT
+      DYNARRAY_ELEMENT_INIT (E) is evaluated to initialize a new
+      element.  E is of type  DYNARRAY_ELEMENT *.
+      If DYNARRAY_ELEMENT_FREE but not DYNARRAY_ELEMENT_INIT is
+      defined, new elements are automatically zero-initialized.
+      Otherwise, new elements have undefined contents.
+
+   DYNARRAY_INITIAL_SIZE
+      The size of the statically allocated array (default:
+      at least 2, more elements if they fit into 128 bytes).
+      Must be a preprocessor constant.  If DYNARRAY_INITIAL_SIZE is 0,
+      there is no statically allocated array at, and all non-empty
+      arrays are heap-allocated.
+
+   DYNARRAY_FINAL_TYPE
+      The name of the type which holds the final array.  If not
+      defined, is PREFIX##finalize not provided.  DYNARRAY_FINAL_TYPE
+      must be a struct type, with members of type DYNARRAY_ELEMENT and
+      size_t at the start (in this order).
+
+   These macros are undefined after this header file has been
+   included.
+
+   The following types are provided (their members are private to the
+   dynarray implementation):
+
+     struct DYNARRAY_STRUCT
+
+   The following functions are provided:
+ */
+
+/* Initialize a dynamic array object.  This must be called before any
+   use of the object.  */
+#if 0
+static void
+       DYNARRAY_PREFIX##init (struct DYNARRAY_STRUCT *list);
+#endif
+
+/* Deallocate the dynamic array and its elements.  */
+#if 0
+static void
+       DYNARRAY_PREFIX##free (struct DYNARRAY_STRUCT *list);
+#endif
+
+/* Return true if the dynamic array is in an error state.  */
+#if 0
+static bool
+       DYNARRAY_PREFIX##has_failed (const struct DYNARRAY_STRUCT *list);
+#endif
+
+/* Mark the dynamic array as failed.  All elements are deallocated as
+   a side effect.  */
+#if 0
+static void
+       DYNARRAY_PREFIX##mark_failed (struct DYNARRAY_STRUCT *list);
+#endif
+
+/* Return the number of elements which have been added to the dynamic
+   array.  */
+#if 0
+static size_t
+       DYNARRAY_PREFIX##size (const struct DYNARRAY_STRUCT *list);
+#endif
+
+/* Return a pointer to the first array element, if any.  For a
+   zero-length array, the pointer can be NULL even though the dynamic
+   array has not entered the failure state.  */
+#if 0
+static DYNARRAY_ELEMENT *
+       DYNARRAY_PREFIX##begin (const struct DYNARRAY_STRUCT *list);
+#endif
+
+/* Return a pointer one element past the last array element.  For a
+   zero-length array, the pointer can be NULL even though the dynamic
+   array has not entered the failure state.  */
+#if 0
+static DYNARRAY_ELEMENT *
+       DYNARRAY_PREFIX##end (const struct DYNARRAY_STRUCT *list);
+#endif
+
+/* Return a pointer to the array element at INDEX.  Terminate the
+   process if INDEX is out of bounds.  */
+#if 0
+static DYNARRAY_ELEMENT *
+       DYNARRAY_PREFIX##at (struct DYNARRAY_STRUCT *list, size_t index);
+#endif
+
+/* Add ITEM at the end of the array, enlarging it by one element.
+   Mark *LIST as failed if the dynamic array allocation size cannot be
+   increased.  */
+#if 0
+static void
+       DYNARRAY_PREFIX##add (struct DYNARRAY_STRUCT *list,
+                             DYNARRAY_ELEMENT item);
+#endif
+
+/* Allocate a place for a new element in *LIST and return a pointer to
+   it.  The pointer can be NULL if the dynamic array cannot be
+   enlarged due to a memory allocation failure.  */
+#if 0
+static DYNARRAY_ELEMENT *
+       DYNARRAY_PREFIX##emplace (struct DYNARRAY_STRUCT *list);
+#endif
+
+/* Change the size of *LIST to SIZE.  If SIZE is larger than the
+   existing size, new elements are added (which can be initialized).
+   Otherwise, the list is truncated, and elements are freed.  Return
+   false on memory allocation failure (and mark *LIST as failed).  */
+#if 0
+static bool
+       DYNARRAY_PREFIX##resize (struct DYNARRAY_STRUCT *list, size_t size);
+#endif
+
+/* Remove the last element of LIST if it is present.  */
+#if 0
+static void
+       DYNARRAY_PREFIX##remove_last (struct DYNARRAY_STRUCT *list);
+#endif
+
+/* Remove all elements from the list.  The elements are freed, but the
+   list itself is not.  */
+#if 0
+static void
+       DYNARRAY_PREFIX##clear (struct DYNARRAY_STRUCT *list);
+#endif
+
+#if defined DYNARRAY_FINAL_TYPE
+/* Transfer the dynamic array to a permanent location at *RESULT.
+   Returns true on success on false on allocation failure.  In either
+   case, *LIST is re-initialized and can be reused.  A NULL pointer is
+   stored in *RESULT if LIST refers to an empty list.  On success, the
+   pointer in *RESULT is heap-allocated and must be deallocated using
+   free.  */
+#if 0
+static bool
+       DYNARRAY_PREFIX##finalize (struct DYNARRAY_STRUCT *list,
+                                  DYNARRAY_FINAL_TYPE *result);
+#endif
+#else /* !defined DYNARRAY_FINAL_TYPE */
+/* Transfer the dynamic array to a heap-allocated array and return a
+   pointer to it.  The pointer is NULL if memory allocation fails, or
+   if the array is empty, so this function should be used only for
+   arrays which are known not be empty (usually because they always
+   have a sentinel at the end).  If LENGTHP is not NULL, the array
+   length is written to *LENGTHP.  *LIST is re-initialized and can be
+   reused.  */
+#if 0
+static DYNARRAY_ELEMENT *
+       DYNARRAY_PREFIX##finalize (struct DYNARRAY_STRUCT *list,
+                                  size_t *lengthp);
+#endif
+#endif
+
+/* A minimal example which provides a growing list of integers can be
+   defined like this:
+
+     struct int_array
+     {
+       // Pointer to result array followed by its length,
+       // as required by DYNARRAY_FINAL_TYPE.
+       int *array;
+       size_t length;
+     };
+
+     #define DYNARRAY_STRUCT dynarray_int
+     #define DYNARRAY_ELEMENT int
+     #define DYNARRAY_PREFIX dynarray_int_
+     #define DYNARRAY_FINAL_TYPE struct int_array
+     #include <malloc/dynarray-skeleton.c>
+
+   To create a three-element array with elements 1, 2, 3, use this
+   code:
+
+     struct dynarray_int dyn;
+     dynarray_int_init (&dyn);
+     for (int i = 1; i <= 3; ++i)
+       {
+         int *place = dynarray_int_emplace (&dyn);
+         assert (place != NULL);
+         *place = i;
+       }
+     struct int_array result;
+     bool ok = dynarray_int_finalize (&dyn, &result);
+     assert (ok);
+     assert (result.length == 3);
+     assert (result.array[0] == 1);
+     assert (result.array[1] == 2);
+     assert (result.array[2] == 3);
+     free (result.array);
+
+   If the elements contain resources which must be freed, define
+   DYNARRAY_ELEMENT_FREE appropriately, like this:
+
+     struct str_array
+     {
+       char **array;
+       size_t length;
+     };
+
+     #define DYNARRAY_STRUCT dynarray_str
+     #define DYNARRAY_ELEMENT char *
+     #define DYNARRAY_ELEMENT_FREE(ptr) free (*ptr)
+     #define DYNARRAY_PREFIX dynarray_str_
+     #define DYNARRAY_FINAL_TYPE struct str_array
+     #include <malloc/dynarray-skeleton.c>
+ */
+
+
+/* The implementation is imported from glibc.  */
+
+/* Avoid possible conflicts with symbols exported by the GNU libc.  */
+#define __libc_dynarray_at_failure gl_dynarray_at_failure
+#define __libc_dynarray_emplace_enlarge gl_dynarray_emplace_enlarge
+#define __libc_dynarray_finalize gl_dynarray_finalize
+#define __libc_dynarray_resize_clear gl_dynarray_resize_clear
+#define __libc_dynarray_resize gl_dynarray_resize
+
+#if defined DYNARRAY_STRUCT || defined DYNARRAY_ELEMENT || defined DYNARRAY_PREFIX
+
+# ifndef _GL_LIKELY
+/* Rely on __builtin_expect, as provided by the module 'builtin-expect'.  */
+#  define _GL_LIKELY(cond) __builtin_expect ((cond), 1)
+#  define _GL_UNLIKELY(cond) __builtin_expect ((cond), 0)
+# endif
+
+/* Define auxiliary structs and declare auxiliary functions, common to all
+   instantiations of dynarray.  */
+# include <malloc/dynarray.gl.h>
+
+/* Define the instantiation, specified through
+     DYNARRAY_STRUCT
+     DYNARRAY_ELEMENT
+     DYNARRAY_PREFIX
+   etc.  */
+# include <malloc/dynarray-skeleton.gl.h>
+
+#else
+
+/* This file is being included from one of the malloc/dynarray_*.c files.  */
+# include <malloc/dynarray.h>
+
+#endif
+
+#endif /* _GL_DYNARRAY_H */
diff --git a/src/grep/lib/errno.in.h b/src/grep/lib/errno.in.h
new file mode 100644
index 0000000..3cad9e2
--- /dev/null
+++ b/src/grep/lib/errno.in.h
@@ -0,0 +1,279 @@
+/* A POSIX-like <errno.h>.
+
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _@GUARD_PREFIX@_ERRNO_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard.  */
+#@INCLUDE_NEXT@ @NEXT_ERRNO_H@
+
+#ifndef _@GUARD_PREFIX@_ERRNO_H
+#define _@GUARD_PREFIX@_ERRNO_H
+
+
+/* On native Windows platforms, many macros are not defined.  */
+# if defined _WIN32 && ! defined __CYGWIN__
+
+/* These are the same values as defined by MSVC 10, for interoperability.  */
+
+#  ifndef ENOMSG
+#   define ENOMSG    122
+#   define GNULIB_defined_ENOMSG 1
+#  endif
+
+#  ifndef EIDRM
+#   define EIDRM     111
+#   define GNULIB_defined_EIDRM 1
+#  endif
+
+#  ifndef ENOLINK
+#   define ENOLINK   121
+#   define GNULIB_defined_ENOLINK 1
+#  endif
+
+#  ifndef EPROTO
+#   define EPROTO    134
+#   define GNULIB_defined_EPROTO 1
+#  endif
+
+#  ifndef EBADMSG
+#   define EBADMSG   104
+#   define GNULIB_defined_EBADMSG 1
+#  endif
+
+#  ifndef EOVERFLOW
+#   define EOVERFLOW 132
+#   define GNULIB_defined_EOVERFLOW 1
+#  endif
+
+#  ifndef ENOTSUP
+#   define ENOTSUP   129
+#   define GNULIB_defined_ENOTSUP 1
+#  endif
+
+#  ifndef ENETRESET
+#   define ENETRESET 117
+#   define GNULIB_defined_ENETRESET 1
+#  endif
+
+#  ifndef ECONNABORTED
+#   define ECONNABORTED 106
+#   define GNULIB_defined_ECONNABORTED 1
+#  endif
+
+#  ifndef ECANCELED
+#   define ECANCELED 105
+#   define GNULIB_defined_ECANCELED 1
+#  endif
+
+#  ifndef EOWNERDEAD
+#   define EOWNERDEAD 133
+#   define GNULIB_defined_EOWNERDEAD 1
+#  endif
+
+#  ifndef ENOTRECOVERABLE
+#   define ENOTRECOVERABLE 127
+#   define GNULIB_defined_ENOTRECOVERABLE 1
+#  endif
+
+#  ifndef EINPROGRESS
+#   define EINPROGRESS     112
+#   define EALREADY        103
+#   define ENOTSOCK        128
+#   define EDESTADDRREQ    109
+#   define EMSGSIZE        115
+#   define EPROTOTYPE      136
+#   define ENOPROTOOPT     123
+#   define EPROTONOSUPPORT 135
+#   define EOPNOTSUPP      130
+#   define EAFNOSUPPORT    102
+#   define EADDRINUSE      100
+#   define EADDRNOTAVAIL   101
+#   define ENETDOWN        116
+#   define ENETUNREACH     118
+#   define ECONNRESET      108
+#   define ENOBUFS         119
+#   define EISCONN         113
+#   define ENOTCONN        126
+#   define ETIMEDOUT       138
+#   define ECONNREFUSED    107
+#   define ELOOP           114
+#   define EHOSTUNREACH    110
+#   define EWOULDBLOCK     140
+#   define GNULIB_defined_ESOCK 1
+#  endif
+
+#  ifndef ETXTBSY
+#   define ETXTBSY         139
+#   define ENODATA         120  /* not required by POSIX */
+#   define ENOSR           124  /* not required by POSIX */
+#   define ENOSTR          125  /* not required by POSIX */
+#   define ETIME           137  /* not required by POSIX */
+#   define EOTHER          131  /* not required by POSIX */
+#   define GNULIB_defined_ESTREAMS 1
+#  endif
+
+/* These are intentionally the same values as the WSA* error numbers, defined
+   in <winsock2.h>.  */
+#  define ESOCKTNOSUPPORT 10044  /* not required by POSIX */
+#  define EPFNOSUPPORT    10046  /* not required by POSIX */
+#  define ESHUTDOWN       10058  /* not required by POSIX */
+#  define ETOOMANYREFS    10059  /* not required by POSIX */
+#  define EHOSTDOWN       10064  /* not required by POSIX */
+#  define EPROCLIM        10067  /* not required by POSIX */
+#  define EUSERS          10068  /* not required by POSIX */
+#  define EDQUOT          10069
+#  define ESTALE          10070
+#  define EREMOTE         10071  /* not required by POSIX */
+#  define GNULIB_defined_EWINSOCK 1
+
+# endif
+
+
+/* On OSF/1 5.1, when _XOPEN_SOURCE_EXTENDED is not defined, the macros
+   EMULTIHOP, ENOLINK, EOVERFLOW are not defined.  */
+# if @EMULTIHOP_HIDDEN@
+#  define EMULTIHOP @EMULTIHOP_VALUE@
+#  define GNULIB_defined_EMULTIHOP 1
+# endif
+# if @ENOLINK_HIDDEN@
+#  define ENOLINK   @ENOLINK_VALUE@
+#  define GNULIB_defined_ENOLINK 1
+# endif
+# if @EOVERFLOW_HIDDEN@
+#  define EOVERFLOW @EOVERFLOW_VALUE@
+#  define GNULIB_defined_EOVERFLOW 1
+# endif
+
+
+/* On OpenBSD 4.0 and on native Windows, the macros ENOMSG, EIDRM, ENOLINK,
+   EPROTO, EMULTIHOP, EBADMSG, EOVERFLOW, ENOTSUP, ECANCELED are not defined.
+   Likewise, on NonStop Kernel, EDQUOT is not defined.
+   Define them here.  Values >= 2000 seem safe to use: Solaris ESTALE = 151,
+   HP-UX EWOULDBLOCK = 246, IRIX EDQUOT = 1133.
+
+   Note: When one of these systems defines some of these macros some day,
+   binaries will have to be recompiled so that they recognizes the new
+   errno values from the system.  */
+
+# ifndef ENOMSG
+#  define ENOMSG    2000
+#  define GNULIB_defined_ENOMSG 1
+# endif
+
+# ifndef EIDRM
+#  define EIDRM     2001
+#  define GNULIB_defined_EIDRM 1
+# endif
+
+# ifndef ENOLINK
+#  define ENOLINK   2002
+#  define GNULIB_defined_ENOLINK 1
+# endif
+
+# ifndef EPROTO
+#  define EPROTO    2003
+#  define GNULIB_defined_EPROTO 1
+# endif
+
+# ifndef EMULTIHOP
+#  define EMULTIHOP 2004
+#  define GNULIB_defined_EMULTIHOP 1
+# endif
+
+# ifndef EBADMSG
+#  define EBADMSG   2005
+#  define GNULIB_defined_EBADMSG 1
+# endif
+
+# ifndef EOVERFLOW
+#  define EOVERFLOW 2006
+#  define GNULIB_defined_EOVERFLOW 1
+# endif
+
+# ifndef ENOTSUP
+#  define ENOTSUP   2007
+#  define GNULIB_defined_ENOTSUP 1
+# endif
+
+# ifndef ENETRESET
+#  define ENETRESET 2011
+#  define GNULIB_defined_ENETRESET 1
+# endif
+
+# ifndef ECONNABORTED
+#  define ECONNABORTED 2012
+#  define GNULIB_defined_ECONNABORTED 1
+# endif
+
+# ifndef ESTALE
+#  define ESTALE    2009
+#  define GNULIB_defined_ESTALE 1
+# endif
+
+# ifndef EDQUOT
+#  define EDQUOT 2010
+#  define GNULIB_defined_EDQUOT 1
+# endif
+
+# ifndef ECANCELED
+#  define ECANCELED 2008
+#  define GNULIB_defined_ECANCELED 1
+# endif
+
+/* On many platforms, the macros EOWNERDEAD and ENOTRECOVERABLE are not
+   defined.  */
+
+# ifndef EOWNERDEAD
+#  if defined __sun
+    /* Use the same values as defined for Solaris >= 8, for
+       interoperability.  */
+#   define EOWNERDEAD      58
+#   define ENOTRECOVERABLE 59
+#  elif defined _WIN32 && ! defined __CYGWIN__
+    /* We have a conflict here: pthreads-win32 defines these values
+       differently than MSVC 10.  It's hairy to decide which one to use.  */
+#   if defined __MINGW32__ && !defined USE_WINDOWS_THREADS
+     /* Use the same values as defined by pthreads-win32, for
+        interoperability.  */
+#    define EOWNERDEAD      43
+#    define ENOTRECOVERABLE 44
+#   else
+     /* Use the same values as defined by MSVC 10, for
+        interoperability.  */
+#    define EOWNERDEAD      133
+#    define ENOTRECOVERABLE 127
+#   endif
+#  else
+#   define EOWNERDEAD      2013
+#   define ENOTRECOVERABLE 2014
+#  endif
+#  define GNULIB_defined_EOWNERDEAD 1
+#  define GNULIB_defined_ENOTRECOVERABLE 1
+# endif
+
+# ifndef EILSEQ
+#  define EILSEQ 2015
+#  define GNULIB_defined_EILSEQ 1
+# endif
+
+#endif /* _@GUARD_PREFIX@_ERRNO_H */
+#endif /* _@GUARD_PREFIX@_ERRNO_H */
diff --git a/src/grep/lib/error.c b/src/grep/lib/error.c
new file mode 100644
index 0000000..f89dcc5
--- /dev/null
+++ b/src/grep/lib/error.c
@@ -0,0 +1,411 @@
+/* Error handler for noninteractive utilities
+   Copyright (C) 1990-1998, 2000-2007, 2009-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by David MacKenzie <djm@gnu.ai.mit.edu>.  */
+
+#if !_LIBC
+# include <config.h>
+#endif
+
+#include "error.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if !_LIBC && ENABLE_NLS
+# include "gettext.h"
+# define _(msgid) gettext (msgid)
+#endif
+
+#ifdef _LIBC
+# include <libintl.h>
+# include <stdbool.h>
+# include <stdint.h>
+# include <wchar.h>
+# define mbsrtowcs __mbsrtowcs
+# define USE_UNLOCKED_IO 0
+# define _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD(a, b)
+# define _GL_ARG_NONNULL(a)
+#else
+# include "getprogname.h"
+#endif
+
+#if USE_UNLOCKED_IO
+# include "unlocked-io.h"
+#endif
+
+#ifndef _
+# define _(String) String
+#endif
+
+/* If NULL, error will flush stdout, then print on stderr the program
+   name, a colon and a space.  Otherwise, error will call this
+   function without parameters instead.  */
+void (*error_print_progname) (void);
+
+/* This variable is incremented each time 'error' is called.  */
+unsigned int error_message_count;
+
+#ifdef _LIBC
+/* In the GNU C library, there is a predefined variable for this.  */
+
+# define program_name program_invocation_name
+# include <errno.h>
+# include <limits.h>
+# include <libio/libioP.h>
+
+/* In GNU libc we want do not want to use the common name 'error' directly.
+   Instead make it a weak alias.  */
+extern void __error (int status, int errnum, const char *message, ...)
+     __attribute__ ((__format__ (__printf__, 3, 4)));
+extern void __error_at_line (int status, int errnum, const char *file_name,
+                             unsigned int line_number, const char *message,
+                             ...)
+     __attribute__ ((__format__ (__printf__, 5, 6)));
+# define error __error
+# define error_at_line __error_at_line
+
+# include <libio/iolibio.h>
+# define fflush(s) _IO_fflush (s)
+# undef putc
+# define putc(c, fp) _IO_putc (c, fp)
+
+# include <bits/libc-lock.h>
+
+#else /* not _LIBC */
+
+# include <fcntl.h>
+# include <unistd.h>
+
+# if defined _WIN32 && ! defined __CYGWIN__
+/* Get declarations of the native Windows API functions.  */
+#  define WIN32_LEAN_AND_MEAN
+#  include <windows.h>
+/* Get _get_osfhandle.  */
+#  if GNULIB_MSVC_NOTHROW
+#   include "msvc-nothrow.h"
+#  else
+#   include <io.h>
+#  endif
+# endif
+
+/* The gnulib override of fcntl is not needed in this file.  */
+# undef fcntl
+
+# if !(GNULIB_STRERROR_R_POSIX || HAVE_DECL_STRERROR_R)
+#  ifndef HAVE_DECL_STRERROR_R
+"this configure-time declaration test was not run"
+#  endif
+#  if STRERROR_R_CHAR_P
+char *strerror_r (int errnum, char *buf, size_t buflen);
+#  else
+int strerror_r (int errnum, char *buf, size_t buflen);
+#  endif
+# endif
+
+# define program_name getprogname ()
+
+# if GNULIB_STRERROR_R_POSIX || HAVE_STRERROR_R || defined strerror_r
+#  define __strerror_r strerror_r
+# endif /* GNULIB_STRERROR_R_POSIX || HAVE_STRERROR_R || defined strerror_r */
+#endif  /* not _LIBC */
+
+#if !_LIBC
+/* Return non-zero if FD is open.  */
+static int
+is_open (int fd)
+{
+# if defined _WIN32 && ! defined __CYGWIN__
+  /* On native Windows: The initial state of unassigned standard file
+     descriptors is that they are open but point to an INVALID_HANDLE_VALUE.
+     There is no fcntl, and the gnulib replacement fcntl does not support
+     F_GETFL.  */
+  return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
+# else
+#  ifndef F_GETFL
+#   error Please port fcntl to your platform
+#  endif
+  return 0 <= fcntl (fd, F_GETFL);
+# endif
+}
+#endif
+
+static void
+flush_stdout (void)
+{
+#if !_LIBC
+  int stdout_fd;
+
+# if GNULIB_FREOPEN_SAFER
+  /* Use of gnulib's freopen-safer module normally ensures that
+       fileno (stdout) == 1
+     whenever stdout is open.  */
+  stdout_fd = STDOUT_FILENO;
+# else
+  /* POSIX states that fileno (stdout) after fclose is unspecified.  But in
+     practice it is not a problem, because stdout is statically allocated and
+     the fd of a FILE stream is stored as a field in its allocated memory.  */
+  stdout_fd = fileno (stdout);
+# endif
+  /* POSIX states that fflush (stdout) after fclose is unspecified; it
+     is safe in glibc, but not on all other platforms.  fflush (NULL)
+     is always defined, but too draconian.  */
+  if (0 <= stdout_fd && is_open (stdout_fd))
+#endif
+    fflush (stdout);
+}
+
+static void
+print_errno_message (int errnum)
+{
+  char const *s;
+
+#if _LIBC || GNULIB_STRERROR_R_POSIX || defined HAVE_STRERROR_R
+  char errbuf[1024];
+# if _LIBC || (!GNULIB_STRERROR_R_POSIX && STRERROR_R_CHAR_P)
+  s = __strerror_r (errnum, errbuf, sizeof errbuf);
+# else
+  if (__strerror_r (errnum, errbuf, sizeof errbuf) == 0)
+    s = errbuf;
+  else
+    s = 0;
+# endif
+#else
+  s = strerror (errnum);
+#endif
+
+#if !_LIBC
+  if (! s)
+    s = _("Unknown system error");
+#endif
+
+#if _LIBC
+  __fxprintf (NULL, ": %s", s);
+#else
+  fprintf (stderr, ": %s", s);
+#endif
+}
+
+static void _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (3, 0) _GL_ARG_NONNULL ((3))
+error_tail (int status, int errnum, const char *message, va_list args)
+{
+#if _LIBC
+  if (_IO_fwide (stderr, 0) > 0)
+    {
+      size_t len = strlen (message) + 1;
+      wchar_t *wmessage = NULL;
+      mbstate_t st;
+      size_t res;
+      const char *tmp;
+      bool use_malloc = false;
+
+      while (1)
+        {
+          if (__libc_use_alloca (len * sizeof (wchar_t)))
+            wmessage = (wchar_t *) alloca (len * sizeof (wchar_t));
+          else
+            {
+              if (!use_malloc)
+                wmessage = NULL;
+
+              wchar_t *p = (wchar_t *) realloc (wmessage,
+                                                len * sizeof (wchar_t));
+              if (p == NULL)
+                {
+                  free (wmessage);
+                  fputws_unlocked (L"out of memory\n", stderr);
+                  return;
+                }
+              wmessage = p;
+              use_malloc = true;
+            }
+
+          memset (&st, '\0', sizeof (st));
+          tmp = message;
+
+          res = mbsrtowcs (wmessage, &tmp, len, &st);
+          if (res != len)
+            break;
+
+          if (__builtin_expect (len >= SIZE_MAX / sizeof (wchar_t) / 2, 0))
+            {
+              /* This really should not happen if everything is fine.  */
+              res = (size_t) -1;
+              break;
+            }
+
+          len *= 2;
+        }
+
+      if (res == (size_t) -1)
+        {
+          /* The string cannot be converted.  */
+          if (use_malloc)
+            {
+              free (wmessage);
+              use_malloc = false;
+            }
+          wmessage = (wchar_t *) L"???";
+        }
+
+      __vfwprintf (stderr, wmessage, args);
+
+      if (use_malloc)
+        free (wmessage);
+    }
+  else
+#endif
+    vfprintf (stderr, message, args);
+
+  ++error_message_count;
+  if (errnum)
+    print_errno_message (errnum);
+#if _LIBC
+  __fxprintf (NULL, "\n");
+#else
+  putc ('\n', stderr);
+#endif
+  fflush (stderr);
+  if (status)
+    exit (status);
+}
+
+
+/* Print the program name and error message MESSAGE, which is a printf-style
+   format string with optional args.
+   If ERRNUM is nonzero, print its corresponding system error message.
+   Exit with status STATUS if it is nonzero.  */
+void
+error (int status, int errnum, const char *message, ...)
+{
+  va_list args;
+
+#if defined _LIBC && defined __libc_ptf_call
+  /* We do not want this call to be cut short by a thread
+     cancellation.  Therefore disable cancellation for now.  */
+  int state = PTHREAD_CANCEL_ENABLE;
+  __libc_ptf_call (pthread_setcancelstate, (PTHREAD_CANCEL_DISABLE, &state),
+                   0);
+#endif
+
+  flush_stdout ();
+#ifdef _LIBC
+  _IO_flockfile (stderr);
+#endif
+  if (error_print_progname)
+    (*error_print_progname) ();
+  else
+    {
+#if _LIBC
+      __fxprintf (NULL, "%s: ", program_name);
+#else
+      fprintf (stderr, "%s: ", program_name);
+#endif
+    }
+
+  va_start (args, message);
+  error_tail (status, errnum, message, args);
+  va_end (args);
+
+#ifdef _LIBC
+  _IO_funlockfile (stderr);
+# ifdef __libc_ptf_call
+  __libc_ptf_call (pthread_setcancelstate, (state, NULL), 0);
+# endif
+#endif
+}
+
+/* Sometimes we want to have at most one error per line.  This
+   variable controls whether this mode is selected or not.  */
+int error_one_per_line;
+
+void
+error_at_line (int status, int errnum, const char *file_name,
+               unsigned int line_number, const char *message, ...)
+{
+  va_list args;
+
+  if (error_one_per_line)
+    {
+      static const char *old_file_name;
+      static unsigned int old_line_number;
+
+      if (old_line_number == line_number
+          && (file_name == old_file_name
+              || (old_file_name != NULL
+                  && file_name != NULL
+                  && strcmp (old_file_name, file_name) == 0)))
+
+        /* Simply return and print nothing.  */
+        return;
+
+      old_file_name = file_name;
+      old_line_number = line_number;
+    }
+
+#if defined _LIBC && defined __libc_ptf_call
+  /* We do not want this call to be cut short by a thread
+     cancellation.  Therefore disable cancellation for now.  */
+  int state = PTHREAD_CANCEL_ENABLE;
+  __libc_ptf_call (pthread_setcancelstate, (PTHREAD_CANCEL_DISABLE, &state),
+                   0);
+#endif
+
+  flush_stdout ();
+#ifdef _LIBC
+  _IO_flockfile (stderr);
+#endif
+  if (error_print_progname)
+    (*error_print_progname) ();
+  else
+    {
+#if _LIBC
+      __fxprintf (NULL, "%s:", program_name);
+#else
+      fprintf (stderr, "%s:", program_name);
+#endif
+    }
+
+#if _LIBC
+  __fxprintf (NULL, file_name != NULL ? "%s:%u: " : " ",
+              file_name, line_number);
+#else
+  fprintf (stderr, file_name != NULL ? "%s:%u: " : " ",
+           file_name, line_number);
+#endif
+
+  va_start (args, message);
+  error_tail (status, errnum, message, args);
+  va_end (args);
+
+#ifdef _LIBC
+  _IO_funlockfile (stderr);
+# ifdef __libc_ptf_call
+  __libc_ptf_call (pthread_setcancelstate, (state, NULL), 0);
+# endif
+#endif
+}
+
+#ifdef _LIBC
+/* Make the weak alias.  */
+# undef error
+# undef error_at_line
+weak_alias (__error, error)
+weak_alias (__error_at_line, error_at_line)
+#endif
diff --git a/src/grep/lib/error.h b/src/grep/lib/error.h
new file mode 100644
index 0000000..814715e
--- /dev/null
+++ b/src/grep/lib/error.h
@@ -0,0 +1,66 @@
+/* Declaration for error-reporting function
+   Copyright (C) 1995-1997, 2003, 2006, 2008-2021 Free Software Foundation,
+   Inc.
+   This file is part of the GNU C Library.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _ERROR_H
+#define _ERROR_H 1
+
+/* Get _GL_ATTRIBUTE_SPEC_PRINTF_STANDARD, _GL_ATTRIBUTE_SPEC_PRINTF_SYSTEM.  */
+#include <stdio.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Print a message with 'fprintf (stderr, FORMAT, ...)';
+   if ERRNUM is nonzero, follow it with ": " and strerror (ERRNUM).
+   If STATUS is nonzero, terminate the program with 'exit (STATUS)'.  */
+
+extern void error (int __status, int __errnum, const char *__format, ...)
+#if GNULIB_VFPRINTF_POSIX
+     _GL_ATTRIBUTE_FORMAT ((_GL_ATTRIBUTE_SPEC_PRINTF_STANDARD, 3, 4))
+#else
+     _GL_ATTRIBUTE_FORMAT ((_GL_ATTRIBUTE_SPEC_PRINTF_SYSTEM, 3, 4))
+#endif
+     ;
+
+extern void error_at_line (int __status, int __errnum, const char *__fname,
+                           unsigned int __lineno, const char *__format, ...)
+#if GNULIB_VFPRINTF_POSIX
+     _GL_ATTRIBUTE_FORMAT ((_GL_ATTRIBUTE_SPEC_PRINTF_STANDARD, 5, 6))
+#else
+     _GL_ATTRIBUTE_FORMAT ((_GL_ATTRIBUTE_SPEC_PRINTF_SYSTEM, 5, 6))
+#endif
+     ;
+
+/* If NULL, error will flush stdout, then print on stderr the program
+   name, a colon and a space.  Otherwise, error will call this
+   function without parameters instead.  */
+extern void (*error_print_progname) (void);
+
+/* This variable is incremented each time 'error' is called.  */
+extern unsigned int error_message_count;
+
+/* Sometimes we want to have at most one error per line.  This
+   variable controls whether this mode is selected or not.  */
+extern int error_one_per_line;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* error.h */
diff --git a/src/grep/lib/exclude.c b/src/grep/lib/exclude.c
new file mode 100644
index 0000000..417ab23
--- /dev/null
+++ b/src/grep/lib/exclude.c
@@ -0,0 +1,692 @@
+/* exclude.c -- exclude file names
+
+   Copyright (C) 1992-1994, 1997, 1999-2007, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert <eggert@twinsun.com>
+   and Sergey Poznyakoff <gray@gnu.org>.
+   Thanks to Phil Proudman <phil@proudman51.freeserve.co.uk>
+   for improvement suggestions. */
+
+#include <config.h>
+
+#include <stdbool.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wctype.h>
+#include <regex.h>
+
+#include "exclude.h"
+#include "hash.h"
+#include "mbuiter.h"
+#include "fnmatch.h"
+#include "xalloc.h"
+#include "verify.h"
+#include "filename.h"
+
+#if GNULIB_EXCLUDE_SINGLE_THREAD
+# include "unlocked-io.h"
+#endif
+
+/* Non-GNU systems lack these options, so we don't need to check them.  */
+#ifndef FNM_CASEFOLD
+# define FNM_CASEFOLD 0
+#endif
+#ifndef FNM_EXTMATCH
+# define FNM_EXTMATCH 0
+#endif
+#ifndef FNM_LEADING_DIR
+# define FNM_LEADING_DIR 0
+#endif
+
+verify (((EXCLUDE_ANCHORED | EXCLUDE_INCLUDE | EXCLUDE_WILDCARDS)
+         & (FNM_PATHNAME | FNM_NOESCAPE | FNM_PERIOD | FNM_LEADING_DIR
+            | FNM_CASEFOLD | FNM_EXTMATCH))
+        == 0);
+
+
+/* Exclusion patterns are grouped into a singly-linked list of
+   "exclusion segments".  Each segment represents a set of patterns
+   that can be matches using the same algorithm.  Non-wildcard
+   patterns are kept in hash tables, to speed up searches.  Wildcard
+   patterns are stored as arrays of patterns. */
+
+
+/* An exclude pattern-options pair.  The options are fnmatch options
+   ORed with EXCLUDE_* options.  */
+
+struct patopts
+  {
+    int options;
+    union
+    {
+      char const *pattern;
+      regex_t re;
+    } v;
+  };
+
+/* An array of pattern-options pairs.  */
+
+struct exclude_pattern
+  {
+    struct patopts *exclude;
+    idx_t exclude_alloc;
+    idx_t exclude_count;
+  };
+
+enum exclude_type
+  {
+    exclude_hash,                    /* a hash table of excluded names */
+    exclude_pattern                  /* an array of exclude patterns */
+  };
+
+struct exclude_segment
+  {
+    struct exclude_segment *next;    /* next segment in list */
+    enum exclude_type type;          /* type of this segment */
+    int options;                     /* common options for this segment */
+    union
+    {
+      Hash_table *table;             /* for type == exclude_hash */
+      struct exclude_pattern pat;    /* for type == exclude_pattern */
+    } v;
+  };
+
+struct pattern_buffer
+  {
+    struct pattern_buffer *next;
+    char *base;
+  };
+
+/* The exclude structure keeps a singly-linked list of exclude segments,
+   maintained in reverse order.  */
+struct exclude
+  {
+    struct exclude_segment *head;
+    struct pattern_buffer *patbuf;
+  };
+
+/* Register BUF in the pattern buffer list of EX.  ADD_FUNC (see
+   add_exclude_file and add_exclude_fp below) can use this function
+   if it modifies the pattern, to ensure the allocated memory will be
+   properly reclaimed upon calling free_exclude. */
+void
+exclude_add_pattern_buffer (struct exclude *ex, char *buf)
+{
+  struct pattern_buffer *pbuf = xmalloc (sizeof *pbuf);
+  pbuf->base = buf;
+  pbuf->next = ex->patbuf;
+  ex->patbuf = pbuf;
+}
+
+/* Return true if STR has or may have wildcards, when matched with OPTIONS.
+   Return false if STR definitely does not have wildcards.  */
+bool
+fnmatch_pattern_has_wildcards (const char *str, int options)
+{
+  while (1)
+    {
+      switch (*str++)
+        {
+        case '.':
+        case '{':
+        case '}':
+        case '(':
+        case ')':
+          if (options & EXCLUDE_REGEX)
+            return true;
+          break;
+
+        case '\\':
+          if (options & EXCLUDE_REGEX)
+            continue;
+          else
+            str += ! (options & FNM_NOESCAPE) && *str;
+          break;
+
+        case '+': case '@': case '!':
+          if (options & FNM_EXTMATCH && *str == '(')
+            return true;
+          break;
+
+        case '?': case '*': case '[':
+          return true;
+
+        case '\0':
+          return false;
+        }
+    }
+}
+
+static void
+unescape_pattern (char *str)
+{
+  char const *q = str;
+  do
+    q += *q == '\\' && q[1];
+  while ((*str++ = *q++));
+}
+
+/* Return a newly allocated and empty exclude list.  */
+
+struct exclude *
+new_exclude (void)
+{
+  return xzalloc (sizeof *new_exclude ());
+}
+
+/* Calculate the hash of string.  */
+static size_t
+string_hasher (void const *data, size_t n_buckets)
+{
+  char const *p = data;
+  return hash_string (p, n_buckets);
+}
+
+/* Ditto, for case-insensitive hashes */
+static size_t
+string_hasher_ci (void const *data, size_t n_buckets)
+{
+  char const *p = data;
+  mbui_iterator_t iter;
+  size_t value = 0;
+
+  for (mbui_init (iter, p); mbui_avail (iter); mbui_advance (iter))
+    {
+      mbchar_t m = mbui_cur (iter);
+      wchar_t wc;
+
+      if (m.wc_valid)
+        wc = towlower (m.wc);
+      else
+        wc = *m.ptr;
+
+      value = value * 31 + wc;
+    }
+
+  return value % n_buckets;
+}
+
+/* compare two strings for equality */
+static bool
+string_compare (void const *data1, void const *data2)
+{
+  char const *p1 = data1;
+  char const *p2 = data2;
+  return strcmp (p1, p2) == 0;
+}
+
+/* compare two strings for equality, case-insensitive */
+static bool
+string_compare_ci (void const *data1, void const *data2)
+{
+  char const *p1 = data1;
+  char const *p2 = data2;
+  return mbscasecmp (p1, p2) == 0;
+}
+
+static void
+string_free (void *data)
+{
+  free (data);
+}
+
+/* Create new exclude segment of given TYPE and OPTIONS, and attach it
+   to the head of EX.  */
+static void
+new_exclude_segment (struct exclude *ex, enum exclude_type type, int options)
+{
+  struct exclude_segment *sp = xzalloc (sizeof (struct exclude_segment));
+  sp->type = type;
+  sp->options = options;
+  switch (type)
+    {
+    case exclude_pattern:
+      break;
+
+    case exclude_hash:
+      sp->v.table = hash_initialize (0, NULL,
+                                     (options & FNM_CASEFOLD) ?
+                                       string_hasher_ci
+                                       : string_hasher,
+                                     (options & FNM_CASEFOLD) ?
+                                       string_compare_ci
+                                       : string_compare,
+                                     string_free);
+      break;
+    }
+  sp->next = ex->head;
+  ex->head = sp;
+}
+
+/* Free a single exclude segment */
+static void
+free_exclude_segment (struct exclude_segment *seg)
+{
+  switch (seg->type)
+    {
+    case exclude_pattern:
+      for (idx_t i = 0; i < seg->v.pat.exclude_count; i++)
+        {
+          if (seg->v.pat.exclude[i].options & EXCLUDE_REGEX)
+            regfree (&seg->v.pat.exclude[i].v.re);
+        }
+      free (seg->v.pat.exclude);
+      break;
+
+    case exclude_hash:
+      hash_free (seg->v.table);
+      break;
+    }
+  free (seg);
+}
+
+/* Free the storage associated with an exclude list.  */
+void
+free_exclude (struct exclude *ex)
+{
+  struct exclude_segment *seg;
+  struct pattern_buffer *pbuf;
+
+  for (seg = ex->head; seg; )
+    {
+      struct exclude_segment *next = seg->next;
+      free_exclude_segment (seg);
+      seg = next;
+    }
+
+  for (pbuf = ex->patbuf; pbuf; )
+    {
+      struct pattern_buffer *next = pbuf->next;
+      free (pbuf->base);
+      free (pbuf);
+      pbuf = next;
+    }
+
+  free (ex);
+}
+
+/* Return zero if PATTERN matches F, obeying OPTIONS, except that
+   (unlike fnmatch) wildcards are disabled in PATTERN.  */
+
+static int
+fnmatch_no_wildcards (char const *pattern, char const *f, int options)
+{
+  if (! (options & FNM_LEADING_DIR))
+    return ((options & FNM_CASEFOLD)
+            ? mbscasecmp (pattern, f)
+            : strcmp (pattern, f));
+  else if (! (options & FNM_CASEFOLD))
+    {
+      size_t patlen = strlen (pattern);
+      int r = strncmp (pattern, f, patlen);
+      if (! r)
+        {
+          r = f[patlen];
+          if (r == '/')
+            r = 0;
+        }
+      return r;
+    }
+  else
+    {
+      /* Walk through a copy of F, seeing whether P matches any prefix
+         of F.
+
+         FIXME: This is an O(N**2) algorithm; it should be O(N).
+         Also, the copy should not be necessary.  However, fixing this
+         will probably involve a change to the mbs* API.  */
+
+      char *fcopy = xstrdup (f);
+      char *p;
+      int r;
+      for (p = fcopy; ; *p++ = '/')
+        {
+          p = strchr (p, '/');
+          if (p)
+            *p = '\0';
+          r = mbscasecmp (pattern, fcopy);
+          if (!p || r <= 0)
+            break;
+        }
+      free (fcopy);
+      return r;
+    }
+}
+
+bool
+exclude_fnmatch (char const *pattern, char const *f, int options)
+{
+  int (*matcher) (char const *, char const *, int) =
+    (options & EXCLUDE_WILDCARDS
+     ? fnmatch
+     : fnmatch_no_wildcards);
+  bool matched = ((*matcher) (pattern, f, options) == 0);
+  char const *p;
+
+  if (! (options & EXCLUDE_ANCHORED))
+    for (p = f; *p && ! matched; p++)
+      if (*p == '/' && p[1] != '/')
+        matched = ((*matcher) (pattern, p + 1, options) == 0);
+
+  return matched;
+}
+
+static bool
+exclude_patopts (struct patopts const *opts, char const *f)
+{
+  int options = opts->options;
+
+  return (options & EXCLUDE_REGEX)
+          ? regexec (&opts->v.re, f, 0, NULL, 0) == 0
+          : exclude_fnmatch (opts->v.pattern, f, options);
+}
+
+/* Return true if the exclude_pattern segment SEG matches F.  */
+
+static bool
+file_pattern_matches (struct exclude_segment const *seg, char const *f)
+{
+  idx_t exclude_count = seg->v.pat.exclude_count;
+  struct patopts const *exclude = seg->v.pat.exclude;
+
+  for (idx_t i = 0; i < exclude_count; i++)
+    {
+      if (exclude_patopts (exclude + i, f))
+        return true;
+    }
+  return false;
+}
+
+/* Return true if the exclude_hash segment SEG matches F.
+   BUFFER is an auxiliary storage of the same length as F (with nul
+   terminator included) */
+static bool
+file_name_matches (struct exclude_segment const *seg, char const *f,
+                   char *buffer)
+{
+  int options = seg->options;
+  Hash_table *table = seg->v.table;
+
+  do
+    {
+      /* initialize the pattern */
+      strcpy (buffer, f);
+
+      while (1)
+        {
+          if (hash_lookup (table, buffer))
+            return true;
+          if (options & FNM_LEADING_DIR)
+            {
+              char *p = strrchr (buffer, '/');
+              if (p)
+                {
+                  *p = 0;
+                  continue;
+                }
+            }
+          break;
+        }
+
+      if (!(options & EXCLUDE_ANCHORED))
+        {
+          f = strchr (f, '/');
+          if (f)
+            f++;
+        }
+      else
+        break;
+    }
+  while (f);
+
+  return false;
+}
+
+/* Return true if EX excludes F.  */
+
+bool
+excluded_file_name (struct exclude const *ex, char const *f)
+{
+  struct exclude_segment *seg;
+  bool invert = false;
+  char *filename = NULL;
+
+  /* If no patterns are given, the default is to include.  */
+  if (!ex->head)
+    return false;
+
+  /* Scan through the segments, reporting the status of the first match.
+     The segments are in reverse order, so this reports the status of
+     the last match in the original option list.  */
+  for (seg = ex->head; ; seg = seg->next)
+    {
+      if (seg->type == exclude_hash)
+        {
+          if (!filename)
+            filename = xmalloc (strlen (f) + 1);
+          if (file_name_matches (seg, f, filename))
+            break;
+        }
+      else
+        {
+          if (file_pattern_matches (seg, f))
+            break;
+        }
+
+      if (! seg->next)
+        {
+          /* If patterns are given but none match, the default is the
+             opposite of the last segment (i.e., the first in the
+             original option list).  For example, in the command
+             'grep -r --exclude="a*" --include="*b" pat dir', the
+             first option is --exclude so any file name matching
+             neither a* nor *b is included.  */
+          invert = true;
+          break;
+        }
+    }
+
+  free (filename);
+  return invert ^ ! (seg->options & EXCLUDE_INCLUDE);
+}
+
+/* Append to EX the exclusion PATTERN with OPTIONS.  */
+
+void
+add_exclude (struct exclude *ex, char const *pattern, int options)
+{
+  struct exclude_segment *seg;
+  struct exclude_pattern *pat;
+  struct patopts *patopts;
+
+  if ((options & (EXCLUDE_REGEX|EXCLUDE_WILDCARDS))
+      && fnmatch_pattern_has_wildcards (pattern, options))
+    {
+      if (! (ex->head && ex->head->type == exclude_pattern
+             && ((ex->head->options & EXCLUDE_INCLUDE)
+                 == (options & EXCLUDE_INCLUDE))))
+        new_exclude_segment (ex, exclude_pattern, options);
+
+      seg = ex->head;
+
+      pat = &seg->v.pat;
+      if (pat->exclude_count == pat->exclude_alloc)
+        pat->exclude = xpalloc (pat->exclude, &pat->exclude_alloc, 1, -1,
+                                sizeof *pat->exclude);
+      patopts = &pat->exclude[pat->exclude_count++];
+
+      patopts->options = options;
+      if (options & EXCLUDE_REGEX)
+        {
+          int rc;
+          int cflags = REG_NOSUB|REG_EXTENDED|
+                       ((options & FNM_CASEFOLD) ? REG_ICASE : 0);
+
+          if (options & FNM_LEADING_DIR)
+            {
+              char *tmp;
+              idx_t len = strlen (pattern);
+
+              while (len > 0 && ISSLASH (pattern[len-1]))
+                --len;
+
+              if (len == 0)
+                rc = 1;
+              else
+                {
+                  tmp = ximalloc (len + 7);
+                  memcpy (tmp, pattern, len);
+                  strcpy (tmp + len, "(/.*)?");
+                  rc = regcomp (&patopts->v.re, tmp, cflags);
+                  free (tmp);
+                }
+            }
+          else
+            rc = regcomp (&patopts->v.re, pattern, cflags);
+
+          if (rc)
+            {
+              pat->exclude_count--;
+              return;
+            }
+        }
+      else
+        {
+          if (options & EXCLUDE_ALLOC)
+            {
+              pattern = xstrdup (pattern);
+              exclude_add_pattern_buffer (ex, (char*) pattern);
+            }
+          patopts->v.pattern = pattern;
+        }
+    }
+  else
+    {
+      char *str, *p;
+      int exclude_hash_flags = (EXCLUDE_INCLUDE | EXCLUDE_ANCHORED
+                                | FNM_LEADING_DIR | FNM_CASEFOLD);
+      if (! (ex->head && ex->head->type == exclude_hash
+             && ((ex->head->options & exclude_hash_flags)
+                 == (options & exclude_hash_flags))))
+        new_exclude_segment (ex, exclude_hash, options);
+      seg = ex->head;
+
+      str = xstrdup (pattern);
+      if ((options & (EXCLUDE_WILDCARDS | FNM_NOESCAPE)) == EXCLUDE_WILDCARDS)
+        unescape_pattern (str);
+      p = hash_insert (seg->v.table, str);
+      if (p != str)
+        free (str);
+    }
+}
+
+/* Use ADD_FUNC to append to EX the patterns in FILE_NAME, each with
+   OPTIONS.  LINE_END terminates each pattern in the file.  If
+   LINE_END is a space character, ignore trailing spaces and empty
+   lines in FP.  Return -1 on failure, 0 on success.  */
+
+int
+add_exclude_fp (void (*add_func) (struct exclude *, char const *, int, void *),
+                struct exclude *ex, FILE *fp, int options,
+                char line_end,
+                void *data)
+{
+  char *buf = NULL;
+  char *p;
+  char *pattern;
+  char const *lim;
+  idx_t buf_alloc = 0;
+  idx_t buf_count = 0;
+  int c;
+  int e = 0;
+
+  while ((c = getc (fp)) != EOF)
+    {
+      if (buf_count == buf_alloc)
+        buf = xpalloc (buf, &buf_alloc, 1, -1, 1);
+      buf[buf_count++] = c;
+    }
+
+  if (ferror (fp))
+    e = errno;
+
+  buf = xirealloc (buf, buf_count + 1);
+  buf[buf_count] = line_end;
+  lim = buf + buf_count + ! (buf_count == 0 || buf[buf_count - 1] == line_end);
+
+  exclude_add_pattern_buffer (ex, buf);
+
+  pattern = buf;
+
+  for (p = buf; p < lim; p++)
+    if (*p == line_end)
+      {
+        char *pattern_end = p;
+
+        if (isspace ((unsigned char) line_end))
+          {
+            for (; ; pattern_end--)
+              if (pattern_end == pattern)
+                goto next_pattern;
+              else if (! isspace ((unsigned char) pattern_end[-1]))
+                break;
+          }
+
+        *pattern_end = '\0';
+        (*add_func) (ex, pattern, options, data);
+
+      next_pattern:
+        pattern = p + 1;
+      }
+
+  errno = e;
+  return e ? -1 : 0;
+}
+
+static void
+call_addfn (struct exclude *ex, char const *pattern, int options, void *data)
+{
+  void (**addfnptr) (struct exclude *, char const *, int) = data;
+  (*addfnptr) (ex, pattern, options);
+}
+
+int
+add_exclude_file (void (*add_func) (struct exclude *, char const *, int),
+                  struct exclude *ex, char const *file_name, int options,
+                  char line_end)
+{
+  bool use_stdin = file_name[0] == '-' && !file_name[1];
+  FILE *in;
+  int rc = 0;
+
+  if (use_stdin)
+    in = stdin;
+  else if (! (in = fopen (file_name, "re")))
+    return -1;
+
+  rc = add_exclude_fp (call_addfn, ex, in, options, line_end, &add_func);
+
+  if (!use_stdin && fclose (in) != 0)
+    rc = -1;
+
+  return rc;
+}
diff --git a/src/grep/lib/exclude.h b/src/grep/lib/exclude.h
new file mode 100644
index 0000000..8d6581a
--- /dev/null
+++ b/src/grep/lib/exclude.h
@@ -0,0 +1,65 @@
+/* exclude.h -- declarations for excluding file names
+
+   Copyright (C) 1992-1994, 1997, 1999, 2001-2003, 2005-2006, 2009-2021 Free
+   Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GL_EXCLUDE_H
+#define _GL_EXCLUDE_H 1
+
+#include <stdbool.h>
+#include <stdio.h>
+
+/* Written by Paul Eggert <eggert@twinsun.com>
+   and Sergey Poznyakoff <gray@gnu.org> */
+
+/* Exclude options, which can be ORed with fnmatch options.  */
+
+/* Patterns must match the start of file names, instead of matching
+   anywhere after a '/'.  */
+#define EXCLUDE_ANCHORED (1 << 30)
+
+/* Include instead of exclude.  */
+#define EXCLUDE_INCLUDE (1 << 29)
+
+/* '?', '*', '[', and '\\' are special in patterns.  Without this
+   option, these characters are ordinary and fnmatch is not used.  */
+#define EXCLUDE_WILDCARDS (1 << 28)
+
+/* Patterns are POSIX extended regular expressions */
+#define EXCLUDE_REGEX     (1 << 27)
+
+/* Allocate storage for the pattern */
+#define EXCLUDE_ALLOC     (1 << 26)
+
+struct exclude;
+
+bool fnmatch_pattern_has_wildcards (const char *, int) _GL_ATTRIBUTE_PURE;
+
+void free_exclude (struct exclude *)
+  _GL_ATTRIBUTE_NONNULL ((1));
+struct exclude *new_exclude (void)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_RETURNS_NONNULL
+  _GL_ATTRIBUTE_DEALLOC (free_exclude, 1);
+void add_exclude (struct exclude *, char const *, int);
+int add_exclude_file (void (*) (struct exclude *, char const *, int),
+                      struct exclude *, char const *, int, char);
+int add_exclude_fp (void (*) (struct exclude *, char const *, int, void *),
+                    struct exclude *, FILE *, int, char, void *);
+bool excluded_file_name (struct exclude const *, char const *);
+void exclude_add_pattern_buffer (struct exclude *ex, char *buf);
+bool exclude_fnmatch (char const *, char const *, int);
+
+#endif /* _GL_EXCLUDE_H */
diff --git a/src/grep/lib/exitfail.c b/src/grep/lib/exitfail.c
new file mode 100644
index 0000000..ebc1f58
--- /dev/null
+++ b/src/grep/lib/exitfail.c
@@ -0,0 +1,24 @@
+/* Failure exit status
+
+   Copyright (C) 2002-2003, 2005-2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "exitfail.h"
+
+#include <stdlib.h>
+
+int volatile exit_failure = EXIT_FAILURE;
diff --git a/src/grep/lib/exitfail.h b/src/grep/lib/exitfail.h
new file mode 100644
index 0000000..4add9e0
--- /dev/null
+++ b/src/grep/lib/exitfail.h
@@ -0,0 +1,18 @@
+/* Failure exit status
+
+   Copyright (C) 2002, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+extern int volatile exit_failure;
diff --git a/src/grep/lib/fchdir.c b/src/grep/lib/fchdir.c
new file mode 100644
index 0000000..b5ed4df
--- /dev/null
+++ b/src/grep/lib/fchdir.c
@@ -0,0 +1,206 @@
+/* fchdir replacement.
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "assure.h"
+#include "filename.h"
+#include "filenamecat.h"
+
+#ifndef REPLACE_OPEN_DIRECTORY
+# define REPLACE_OPEN_DIRECTORY 0
+#endif
+
+/* This replacement assumes that a directory is not renamed while opened
+   through a file descriptor.
+
+   FIXME: On mingw, this would be possible to enforce if we were to
+   also open a HANDLE to each directory currently visited by a file
+   descriptor, since mingw refuses to rename any in-use file system
+   object.  */
+
+/* Array of file descriptors opened.  If REPLACE_OPEN_DIRECTORY or if it points
+   to a directory, it stores info about this directory.  */
+typedef struct
+{
+  char *name;       /* Absolute name of the directory, or NULL.  */
+  /* FIXME - add a DIR* member to make dirfd possible on mingw?  */
+} dir_info_t;
+static dir_info_t *dirs;
+static size_t dirs_allocated;
+
+/* Try to ensure dirs has enough room for a slot at index fd; free any
+   contents already in that slot.  Return false and set errno to
+   ENOMEM on allocation failure.  */
+static bool
+ensure_dirs_slot (size_t fd)
+{
+  if (fd < dirs_allocated)
+    free (dirs[fd].name);
+  else
+    {
+      size_t new_allocated;
+      dir_info_t *new_dirs;
+
+      new_allocated = 2 * dirs_allocated + 1;
+      if (new_allocated <= fd)
+        new_allocated = fd + 1;
+      new_dirs =
+        (dirs != NULL
+         ? (dir_info_t *) realloc (dirs, new_allocated * sizeof *dirs)
+         : (dir_info_t *) malloc (new_allocated * sizeof *dirs));
+      if (new_dirs == NULL)
+        return false;
+      memset (new_dirs + dirs_allocated, 0,
+              (new_allocated - dirs_allocated) * sizeof *dirs);
+      dirs = new_dirs;
+      dirs_allocated = new_allocated;
+    }
+  return true;
+}
+
+/* Return an absolute name of DIR in malloc'd storage.
+   Upon failure, return NULL with errno set.  */
+static char *
+get_name (char const *dir)
+{
+  char *cwd;
+  char *result;
+
+  if (IS_ABSOLUTE_FILE_NAME (dir))
+    return strdup (dir);
+
+  /* We often encounter "."; treat it as a special case.  */
+  cwd = getcwd (NULL, 0);
+  if (!cwd || (dir[0] == '.' && dir[1] == '\0'))
+    return cwd;
+
+  result = mfile_name_concat (cwd, dir, NULL);
+  free (cwd);
+  return result;
+}
+
+/* Hook into the gnulib replacements for open() and close() to keep track
+   of the open file descriptors.  */
+
+/* Close FD, cleaning up any fd to name mapping if fd was visiting a
+   directory.  */
+void
+_gl_unregister_fd (int fd)
+{
+  if (fd >= 0 && fd < dirs_allocated)
+    {
+      free (dirs[fd].name);
+      dirs[fd].name = NULL;
+    }
+}
+
+/* Mark FD as visiting FILENAME.  FD must be non-negative, and refer
+   to an open file descriptor.  If REPLACE_OPEN_DIRECTORY is non-zero,
+   this should only be called if FD is visiting a directory.  Close FD
+   and return -1 with errno set if there is insufficient memory to track
+   the directory name; otherwise return FD.  */
+int
+_gl_register_fd (int fd, const char *filename)
+{
+  struct stat statbuf;
+
+  assure (0 <= fd);
+  if (REPLACE_OPEN_DIRECTORY
+      || (fstat (fd, &statbuf) == 0 && S_ISDIR (statbuf.st_mode)))
+    {
+      if (!ensure_dirs_slot (fd)
+          || (dirs[fd].name = get_name (filename)) == NULL)
+        {
+          int saved_errno = errno;
+          close (fd);
+          errno = saved_errno;
+          return -1;
+        }
+    }
+  return fd;
+}
+
+/* Mark NEWFD as a duplicate of OLDFD; useful from dup, dup2, dup3,
+   and fcntl.  Both arguments must be valid and distinct file
+   descriptors.  Close NEWFD and return -1 if OLDFD is tracking a
+   directory, but there is insufficient memory to track the same
+   directory in NEWFD; otherwise return NEWFD.  */
+int
+_gl_register_dup (int oldfd, int newfd)
+{
+  assure (0 <= oldfd && 0 <= newfd && oldfd != newfd);
+  if (oldfd < dirs_allocated && dirs[oldfd].name)
+    {
+      /* Duplicated a directory; must ensure newfd is allocated.  */
+      if (!ensure_dirs_slot (newfd)
+          || (dirs[newfd].name = strdup (dirs[oldfd].name)) == NULL)
+        {
+          int saved_errno = errno;
+          close (newfd);
+          errno = saved_errno;
+          newfd = -1;
+        }
+    }
+  else if (newfd < dirs_allocated)
+    {
+      /* Duplicated a non-directory; ensure newfd is cleared.  */
+      free (dirs[newfd].name);
+      dirs[newfd].name = NULL;
+    }
+  return newfd;
+}
+
+/* If FD is currently visiting a directory, then return the name of
+   that directory.  Otherwise, return NULL and set errno.  */
+const char *
+_gl_directory_name (int fd)
+{
+  if (0 <= fd && fd < dirs_allocated && dirs[fd].name != NULL)
+    return dirs[fd].name;
+  /* At this point, fd is either invalid, or open but not a directory.
+     If dup2 fails, errno is correctly EBADF.  */
+  if (0 <= fd)
+    {
+      if (dup2 (fd, fd) == fd)
+        errno = ENOTDIR;
+    }
+  else
+    errno = EBADF;
+  return NULL;
+}
+
+
+/* Implement fchdir() in terms of chdir().  */
+
+int
+fchdir (int fd)
+{
+  const char *name = _gl_directory_name (fd);
+  return name ? chdir (name) : -1;
+}
diff --git a/src/grep/lib/fcntl--.h b/src/grep/lib/fcntl--.h
new file mode 100644
index 0000000..9b01f38
--- /dev/null
+++ b/src/grep/lib/fcntl--.h
@@ -0,0 +1,32 @@
+/* Like fcntl.h, but redefine some names to avoid glitches.
+
+   Copyright (C) 2005, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+#include <fcntl.h>
+#include "fcntl-safer.h"
+
+#undef open
+#define open open_safer
+
+#undef creat
+#define creat creat_safer
+
+#if GNULIB_OPENAT_SAFER
+# undef openat
+# define openat openat_safer
+#endif
diff --git a/src/grep/lib/fcntl-safer.h b/src/grep/lib/fcntl-safer.h
new file mode 100644
index 0000000..68dd9ae
--- /dev/null
+++ b/src/grep/lib/fcntl-safer.h
@@ -0,0 +1,27 @@
+/* Invoke fcntl-like functions, but avoid some glitches.
+
+   Copyright (C) 2005, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+#include <sys/types.h>
+
+int open_safer (char const *, int, ...);
+int creat_safer (char const *, mode_t);
+
+#if GNULIB_OPENAT_SAFER
+int openat_safer (int, char const *, int, ...);
+#endif
diff --git a/src/grep/lib/fcntl.c b/src/grep/lib/fcntl.c
new file mode 100644
index 0000000..c744eb9
--- /dev/null
+++ b/src/grep/lib/fcntl.c
@@ -0,0 +1,629 @@
+/* Provide file descriptor control.
+
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <fcntl.h>
+
+#include <errno.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#ifdef __KLIBC__
+# define INCL_DOS
+# include <os2.h>
+#endif
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Get declarations of the native Windows API functions.  */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+
+/* Get _get_osfhandle.  */
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+
+/* Upper bound on getdtablesize().  See lib/getdtablesize.c.  */
+# define OPEN_MAX_MAX 0x10000
+
+/* Duplicate OLDFD into the first available slot of at least NEWFD,
+   which must be positive, with FLAGS determining whether the duplicate
+   will be inheritable.  */
+static int
+dupfd (int oldfd, int newfd, int flags)
+{
+  /* Mingw has no way to create an arbitrary fd.  Iterate until all
+     file descriptors less than newfd are filled up.  */
+  HANDLE curr_process = GetCurrentProcess ();
+  HANDLE old_handle = (HANDLE) _get_osfhandle (oldfd);
+  unsigned char fds_to_close[OPEN_MAX_MAX / CHAR_BIT];
+  unsigned int fds_to_close_bound = 0;
+  int result;
+  BOOL inherit = flags & O_CLOEXEC ? FALSE : TRUE;
+  int mode;
+
+  if (newfd < 0 || getdtablesize () <= newfd)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+  if (old_handle == INVALID_HANDLE_VALUE
+      || (mode = _setmode (oldfd, O_BINARY)) == -1)
+    {
+      /* oldfd is not open, or is an unassigned standard file
+         descriptor.  */
+      errno = EBADF;
+      return -1;
+    }
+  _setmode (oldfd, mode);
+  flags |= mode;
+
+  for (;;)
+    {
+      HANDLE new_handle;
+      int duplicated_fd;
+      unsigned int index;
+
+      if (!DuplicateHandle (curr_process,           /* SourceProcessHandle */
+                            old_handle,             /* SourceHandle */
+                            curr_process,           /* TargetProcessHandle */
+                            (PHANDLE) &new_handle,  /* TargetHandle */
+                            (DWORD) 0,              /* DesiredAccess */
+                            inherit,                /* InheritHandle */
+                            DUPLICATE_SAME_ACCESS)) /* Options */
+        {
+          switch (GetLastError ())
+            {
+              case ERROR_TOO_MANY_OPEN_FILES:
+                errno = EMFILE;
+                break;
+              case ERROR_INVALID_HANDLE:
+              case ERROR_INVALID_TARGET_HANDLE:
+              case ERROR_DIRECT_ACCESS_HANDLE:
+                errno = EBADF;
+                break;
+              case ERROR_INVALID_PARAMETER:
+              case ERROR_INVALID_FUNCTION:
+              case ERROR_INVALID_ACCESS:
+                errno = EINVAL;
+                break;
+              default:
+                errno = EACCES;
+                break;
+            }
+          result = -1;
+          break;
+        }
+      duplicated_fd = _open_osfhandle ((intptr_t) new_handle, flags);
+      if (duplicated_fd < 0)
+        {
+          CloseHandle (new_handle);
+          result = -1;
+          break;
+        }
+      if (newfd <= duplicated_fd)
+        {
+          result = duplicated_fd;
+          break;
+        }
+
+      /* Set the bit duplicated_fd in fds_to_close[].  */
+      index = (unsigned int) duplicated_fd / CHAR_BIT;
+      if (fds_to_close_bound <= index)
+        {
+          if (sizeof fds_to_close <= index)
+            /* Need to increase OPEN_MAX_MAX.  */
+            abort ();
+          memset (fds_to_close + fds_to_close_bound, '\0',
+                  index + 1 - fds_to_close_bound);
+          fds_to_close_bound = index + 1;
+        }
+      fds_to_close[index] |= 1 << ((unsigned int) duplicated_fd % CHAR_BIT);
+    }
+
+  /* Close the previous fds that turned out to be too small.  */
+  {
+    int saved_errno = errno;
+    unsigned int duplicated_fd;
+
+    for (duplicated_fd = 0;
+         duplicated_fd < fds_to_close_bound * CHAR_BIT;
+         duplicated_fd++)
+      if ((fds_to_close[duplicated_fd / CHAR_BIT]
+           >> (duplicated_fd % CHAR_BIT))
+          & 1)
+        close (duplicated_fd);
+
+    errno = saved_errno;
+  }
+
+# if REPLACE_FCHDIR
+  if (0 <= result)
+    result = _gl_register_dup (oldfd, result);
+# endif
+  return result;
+}
+#endif /* W32 */
+
+/* Forward declarations, because we '#undef fcntl' in the middle of this
+   compilation unit.  */
+/* Our implementation of fcntl (fd, F_DUPFD, target).  */
+static int rpl_fcntl_DUPFD (int fd, int target);
+/* Our implementation of fcntl (fd, F_DUPFD_CLOEXEC, target).  */
+static int rpl_fcntl_DUPFD_CLOEXEC (int fd, int target);
+#ifdef __KLIBC__
+/* Adds support for fcntl on directories.  */
+static int klibc_fcntl (int fd, int action, /* arg */...);
+#endif
+
+
+/* Perform the specified ACTION on the file descriptor FD, possibly
+   using the argument ARG further described below.  This replacement
+   handles the following actions, and forwards all others on to the
+   native fcntl.  An unrecognized ACTION returns -1 with errno set to
+   EINVAL.
+
+   F_DUPFD - duplicate FD, with int ARG being the minimum target fd.
+   If successful, return the duplicate, which will be inheritable;
+   otherwise return -1 and set errno.
+
+   F_DUPFD_CLOEXEC - duplicate FD, with int ARG being the minimum
+   target fd.  If successful, return the duplicate, which will not be
+   inheritable; otherwise return -1 and set errno.
+
+   F_GETFD - ARG need not be present.  If successful, return a
+   non-negative value containing the descriptor flags of FD (only
+   FD_CLOEXEC is portable, but other flags may be present); otherwise
+   return -1 and set errno.  */
+
+int
+fcntl (int fd, int action, /* arg */...)
+#undef fcntl
+#ifdef __KLIBC__
+# define fcntl klibc_fcntl
+#endif
+{
+  va_list arg;
+  int result = -1;
+  va_start (arg, action);
+  switch (action)
+    {
+    case F_DUPFD:
+      {
+        int target = va_arg (arg, int);
+        result = rpl_fcntl_DUPFD (fd, target);
+        break;
+      }
+
+    case F_DUPFD_CLOEXEC:
+      {
+        int target = va_arg (arg, int);
+        result = rpl_fcntl_DUPFD_CLOEXEC (fd, target);
+        break;
+      }
+
+#if !HAVE_FCNTL
+    case F_GETFD:
+      {
+# if defined _WIN32 && ! defined __CYGWIN__
+        HANDLE handle = (HANDLE) _get_osfhandle (fd);
+        DWORD flags;
+        if (handle == INVALID_HANDLE_VALUE
+            || GetHandleInformation (handle, &flags) == 0)
+          errno = EBADF;
+        else
+          result = (flags & HANDLE_FLAG_INHERIT) ? 0 : FD_CLOEXEC;
+# else /* !W32 */
+        /* Use dup2 to reject invalid file descriptors.  No way to
+           access this information, so punt.  */
+        if (0 <= dup2 (fd, fd))
+          result = 0;
+# endif /* !W32 */
+        break;
+      } /* F_GETFD */
+#endif /* !HAVE_FCNTL */
+
+      /* Implementing F_SETFD on mingw is not trivial - there is no
+         API for changing the O_NOINHERIT bit on an fd, and merely
+         changing the HANDLE_FLAG_INHERIT bit on the underlying handle
+         can lead to odd state.  It may be possible by duplicating the
+         handle, using _open_osfhandle with the right flags, then
+         using dup2 to move the duplicate onto the original, but that
+         is not supported for now.  */
+
+    default:
+      {
+#if HAVE_FCNTL
+        switch (action)
+          {
+          #ifdef F_BARRIERFSYNC                  /* macOS */
+          case F_BARRIERFSYNC:
+          #endif
+          #ifdef F_CHKCLEAN                      /* macOS */
+          case F_CHKCLEAN:
+          #endif
+          #ifdef F_CLOSEM                        /* NetBSD, HP-UX */
+          case F_CLOSEM:
+          #endif
+          #ifdef F_FLUSH_DATA                    /* macOS */
+          case F_FLUSH_DATA:
+          #endif
+          #ifdef F_FREEZE_FS                     /* macOS */
+          case F_FREEZE_FS:
+          #endif
+          #ifdef F_FULLFSYNC                     /* macOS */
+          case F_FULLFSYNC:
+          #endif
+          #ifdef F_GETCONFINED                   /* macOS */
+          case F_GETCONFINED:
+          #endif
+          #ifdef F_GETDEFAULTPROTLEVEL           /* macOS */
+          case F_GETDEFAULTPROTLEVEL:
+          #endif
+          #ifdef F_GETFD                         /* POSIX */
+          case F_GETFD:
+          #endif
+          #ifdef F_GETFL                         /* POSIX */
+          case F_GETFL:
+          #endif
+          #ifdef F_GETLEASE                      /* Linux */
+          case F_GETLEASE:
+          #endif
+          #ifdef F_GETNOSIGPIPE                  /* macOS */
+          case F_GETNOSIGPIPE:
+          #endif
+          #ifdef F_GETOWN                        /* POSIX */
+          case F_GETOWN:
+          #endif
+          #ifdef F_GETPIPE_SZ                    /* Linux */
+          case F_GETPIPE_SZ:
+          #endif
+          #ifdef F_GETPROTECTIONCLASS            /* macOS */
+          case F_GETPROTECTIONCLASS:
+          #endif
+          #ifdef F_GETPROTECTIONLEVEL            /* macOS */
+          case F_GETPROTECTIONLEVEL:
+          #endif
+          #ifdef F_GET_SEALS                     /* Linux */
+          case F_GET_SEALS:
+          #endif
+          #ifdef F_GETSIG                        /* Linux */
+          case F_GETSIG:
+          #endif
+          #ifdef F_MAXFD                         /* NetBSD */
+          case F_MAXFD:
+          #endif
+          #ifdef F_RECYCLE                       /* macOS */
+          case F_RECYCLE:
+          #endif
+          #ifdef F_SETFIFOENH                    /* HP-UX */
+          case F_SETFIFOENH:
+          #endif
+          #ifdef F_THAW_FS                       /* macOS */
+          case F_THAW_FS:
+          #endif
+            /* These actions take no argument.  */
+            result = fcntl (fd, action);
+            break;
+
+          #ifdef F_ADD_SEALS                     /* Linux */
+          case F_ADD_SEALS:
+          #endif
+          #ifdef F_BADFD                         /* Solaris */
+          case F_BADFD:
+          #endif
+          #ifdef F_CHECK_OPENEVT                 /* macOS */
+          case F_CHECK_OPENEVT:
+          #endif
+          #ifdef F_DUP2FD                        /* FreeBSD, AIX, Solaris */
+          case F_DUP2FD:
+          #endif
+          #ifdef F_DUP2FD_CLOEXEC                /* FreeBSD, Solaris */
+          case F_DUP2FD_CLOEXEC:
+          #endif
+          #ifdef F_DUP2FD_CLOFORK                /* Solaris */
+          case F_DUP2FD_CLOFORK:
+          #endif
+          #ifdef F_DUPFD                         /* POSIX */
+          case F_DUPFD:
+          #endif
+          #ifdef F_DUPFD_CLOEXEC                 /* POSIX */
+          case F_DUPFD_CLOEXEC:
+          #endif
+          #ifdef F_DUPFD_CLOFORK                 /* Solaris */
+          case F_DUPFD_CLOFORK:
+          #endif
+          #ifdef F_GETXFL                        /* Solaris */
+          case F_GETXFL:
+          #endif
+          #ifdef F_GLOBAL_NOCACHE                /* macOS */
+          case F_GLOBAL_NOCACHE:
+          #endif
+          #ifdef F_MAKECOMPRESSED                /* macOS */
+          case F_MAKECOMPRESSED:
+          #endif
+          #ifdef F_MOVEDATAEXTENTS               /* macOS */
+          case F_MOVEDATAEXTENTS:
+          #endif
+          #ifdef F_NOCACHE                       /* macOS */
+          case F_NOCACHE:
+          #endif
+          #ifdef F_NODIRECT                      /* macOS */
+          case F_NODIRECT:
+          #endif
+          #ifdef F_NOTIFY                        /* Linux */
+          case F_NOTIFY:
+          #endif
+          #ifdef F_OPLKACK                       /* IRIX */
+          case F_OPLKACK:
+          #endif
+          #ifdef F_OPLKREG                       /* IRIX */
+          case F_OPLKREG:
+          #endif
+          #ifdef F_RDAHEAD                       /* macOS */
+          case F_RDAHEAD:
+          #endif
+          #ifdef F_SETBACKINGSTORE               /* macOS */
+          case F_SETBACKINGSTORE:
+          #endif
+          #ifdef F_SETCONFINED                   /* macOS */
+          case F_SETCONFINED:
+          #endif
+          #ifdef F_SETFD                         /* POSIX */
+          case F_SETFD:
+          #endif
+          #ifdef F_SETFL                         /* POSIX */
+          case F_SETFL:
+          #endif
+          #ifdef F_SETLEASE                      /* Linux */
+          case F_SETLEASE:
+          #endif
+          #ifdef F_SETNOSIGPIPE                  /* macOS */
+          case F_SETNOSIGPIPE:
+          #endif
+          #ifdef F_SETOWN                        /* POSIX */
+          case F_SETOWN:
+          #endif
+          #ifdef F_SETPIPE_SZ                    /* Linux */
+          case F_SETPIPE_SZ:
+          #endif
+          #ifdef F_SETPROTECTIONCLASS            /* macOS */
+          case F_SETPROTECTIONCLASS:
+          #endif
+          #ifdef F_SETSIG                        /* Linux */
+          case F_SETSIG:
+          #endif
+          #ifdef F_SINGLE_WRITER                 /* macOS */
+          case F_SINGLE_WRITER:
+          #endif
+            /* These actions take an 'int' argument.  */
+            {
+              int x = va_arg (arg, int);
+              result = fcntl (fd, action, x);
+            }
+            break;
+
+          default:
+            /* Other actions take a pointer argument.  */
+            {
+              void *p = va_arg (arg, void *);
+              result = fcntl (fd, action, p);
+            }
+            break;
+          }
+#else
+        errno = EINVAL;
+#endif
+        break;
+      }
+    }
+  va_end (arg);
+  return result;
+}
+
+static int
+rpl_fcntl_DUPFD (int fd, int target)
+{
+  int result;
+#if !HAVE_FCNTL
+  result = dupfd (fd, target, 0);
+#elif FCNTL_DUPFD_BUGGY || REPLACE_FCHDIR
+  /* Detect invalid target; needed for cygwin 1.5.x.  */
+  if (target < 0 || getdtablesize () <= target)
+    {
+      result = -1;
+      errno = EINVAL;
+    }
+  else
+    {
+      /* Haiku alpha 2 loses fd flags on original.  */
+      int flags = fcntl (fd, F_GETFD);
+      if (flags < 0)
+        result = -1;
+      else
+        {
+          result = fcntl (fd, F_DUPFD, target);
+          if (0 <= result && fcntl (fd, F_SETFD, flags) == -1)
+            {
+              int saved_errno = errno;
+              close (result);
+              result = -1;
+              errno = saved_errno;
+            }
+# if REPLACE_FCHDIR
+          if (0 <= result)
+            result = _gl_register_dup (fd, result);
+# endif
+        }
+    }
+#else
+  result = fcntl (fd, F_DUPFD, target);
+#endif
+  return result;
+}
+
+static int
+rpl_fcntl_DUPFD_CLOEXEC (int fd, int target)
+{
+  int result;
+#if !HAVE_FCNTL
+  result = dupfd (fd, target, O_CLOEXEC);
+#else /* HAVE_FCNTL */
+# if defined __NetBSD__ || defined __HAIKU__
+  /* On NetBSD 9.0, the system fcntl (fd, F_DUPFD_CLOEXEC, target)
+     has only the same effect as fcntl (fd, F_DUPFD, target).  */
+  /* On Haiku, the system fcntl (fd, F_DUPFD_CLOEXEC, target) sets
+     the FD_CLOEXEC flag on fd, not on target.  Therefore avoid the
+     system fcntl in this case.  */
+#  define have_dupfd_cloexec -1
+# else
+  /* Try the system call first, if the headers claim it exists
+     (that is, if GNULIB_defined_F_DUPFD_CLOEXEC is 0), since we
+     may be running with a glibc that has the macro but with an
+     older kernel that does not support it.  Cache the
+     information on whether the system call really works, but
+     avoid caching failure if the corresponding F_DUPFD fails
+     for any reason.  0 = unknown, 1 = yes, -1 = no.  */
+  static int have_dupfd_cloexec = GNULIB_defined_F_DUPFD_CLOEXEC ? -1 : 0;
+  if (0 <= have_dupfd_cloexec)
+    {
+      result = fcntl (fd, F_DUPFD_CLOEXEC, target);
+      if (0 <= result || errno != EINVAL)
+        {
+          have_dupfd_cloexec = 1;
+#  if REPLACE_FCHDIR
+          if (0 <= result)
+            result = _gl_register_dup (fd, result);
+#  endif
+        }
+      else
+        {
+          result = rpl_fcntl_DUPFD (fd, target);
+          if (result >= 0)
+            have_dupfd_cloexec = -1;
+        }
+    }
+  else
+# endif
+    result = rpl_fcntl_DUPFD (fd, target);
+  if (0 <= result && have_dupfd_cloexec == -1)
+    {
+      int flags = fcntl (result, F_GETFD);
+      if (flags < 0 || fcntl (result, F_SETFD, flags | FD_CLOEXEC) == -1)
+        {
+          int saved_errno = errno;
+          close (result);
+          errno = saved_errno;
+          result = -1;
+        }
+    }
+#endif /* HAVE_FCNTL */
+  return result;
+}
+
+#undef fcntl
+
+#ifdef __KLIBC__
+
+static int
+klibc_fcntl (int fd, int action, /* arg */...)
+{
+  va_list arg_ptr;
+  int arg;
+  struct stat sbuf;
+  int result;
+
+  va_start (arg_ptr, action);
+  arg = va_arg (arg_ptr, int);
+  result = fcntl (fd, action, arg);
+  /* EPERM for F_DUPFD, ENOTSUP for others */
+  if (result == -1 && (errno == EPERM || errno == ENOTSUP)
+      && !fstat (fd, &sbuf) && S_ISDIR (sbuf.st_mode))
+    {
+      ULONG ulMode;
+
+      switch (action)
+        {
+        case F_DUPFD:
+          /* Find available fd */
+          while (fcntl (arg, F_GETFL) != -1 || errno != EBADF)
+            arg++;
+
+          result = dup2 (fd, arg);
+          break;
+
+        /* Using underlying APIs is right ? */
+        case F_GETFD:
+          if (DosQueryFHState (fd, &ulMode))
+            break;
+
+          result = (ulMode & OPEN_FLAGS_NOINHERIT) ? FD_CLOEXEC : 0;
+          break;
+
+        case F_SETFD:
+          if (arg & ~FD_CLOEXEC)
+            break;
+
+          if (DosQueryFHState (fd, &ulMode))
+            break;
+
+          if (arg & FD_CLOEXEC)
+            ulMode |= OPEN_FLAGS_NOINHERIT;
+          else
+            ulMode &= ~OPEN_FLAGS_NOINHERIT;
+
+          /* Filter supported flags.  */
+          ulMode &= (OPEN_FLAGS_WRITE_THROUGH | OPEN_FLAGS_FAIL_ON_ERROR
+                     | OPEN_FLAGS_NO_CACHE | OPEN_FLAGS_NOINHERIT);
+
+          if (DosSetFHState (fd, ulMode))
+            break;
+
+          result = 0;
+          break;
+
+        case F_GETFL:
+          result = 0;
+          break;
+
+        case F_SETFL:
+          if (arg != 0)
+            break;
+
+          result = 0;
+          break;
+
+        default:
+          errno = EINVAL;
+          break;
+        }
+    }
+
+  va_end (arg_ptr);
+
+  return result;
+}
+
+#endif
diff --git a/src/grep/lib/fcntl.in.h b/src/grep/lib/fcntl.in.h
new file mode 100644
index 0000000..26dedc3
--- /dev/null
+++ b/src/grep/lib/fcntl.in.h
@@ -0,0 +1,441 @@
+/* Like <fcntl.h>, but with non-working flags defined to 0.
+
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Paul Eggert */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if defined __need_system_fcntl_h
+/* Special invocation convention.  */
+
+/* Needed before <sys/stat.h>.
+   May also define off_t to a 64-bit type on native Windows.  */
+#include <sys/types.h>
+/* On some systems other than glibc, <sys/stat.h> is a prerequisite of
+   <fcntl.h>.  On glibc systems, we would like to avoid namespace pollution.
+   But on glibc systems, <fcntl.h> includes <sys/stat.h> inside an
+   extern "C" { ... } block, which leads to errors in C++ mode with the
+   overridden <sys/stat.h> from gnulib.  These errors are known to be gone
+   with g++ version >= 4.3.  */
+#if !(defined __GLIBC__ || defined __UCLIBC__) || (defined __cplusplus && defined GNULIB_NAMESPACE && (defined __ICC || !(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))))
+# include <sys/stat.h>
+#endif
+#@INCLUDE_NEXT@ @NEXT_FCNTL_H@
+
+/* Native Windows platforms declare open(), creat() in <io.h>.  */
+#if (@GNULIB_CREAT@ || @GNULIB_OPEN@ || defined GNULIB_POSIXCHECK) \
+    && (defined _WIN32 && ! defined __CYGWIN__)
+# include <io.h>
+#endif
+
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_FCNTL_H
+
+/* Needed before <sys/stat.h>.
+   May also define off_t to a 64-bit type on native Windows.  */
+#include <sys/types.h>
+/* On some systems other than glibc, <sys/stat.h> is a prerequisite of
+   <fcntl.h>.  On glibc systems, we would like to avoid namespace pollution.
+   But on glibc systems, <fcntl.h> includes <sys/stat.h> inside an
+   extern "C" { ... } block, which leads to errors in C++ mode with the
+   overridden <sys/stat.h> from gnulib.  These errors are known to be gone
+   with g++ version >= 4.3.  */
+#if !(defined __GLIBC__ || defined __UCLIBC__) || (defined __cplusplus && defined GNULIB_NAMESPACE && (defined __ICC || !(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))))
+# include <sys/stat.h>
+#endif
+/* The include_next requires a split double-inclusion guard.  */
+#@INCLUDE_NEXT@ @NEXT_FCNTL_H@
+
+/* Native Windows platforms declare open(), creat() in <io.h>.  */
+#if (@GNULIB_CREAT@ || @GNULIB_OPEN@ || defined GNULIB_POSIXCHECK) \
+    && (defined _WIN32 && ! defined __CYGWIN__)
+# include <io.h>
+#endif
+
+#ifndef _@GUARD_PREFIX@_FCNTL_H
+#define _@GUARD_PREFIX@_FCNTL_H
+
+#ifndef __GLIBC__ /* Avoid namespace pollution on glibc systems.  */
+# include <unistd.h>
+#endif
+
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+
+/* Declare overridden functions.  */
+
+#if @GNULIB_CREAT@
+# if @REPLACE_CREAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef creat
+#   define creat rpl_creat
+#  endif
+_GL_FUNCDECL_RPL (creat, int, (const char *filename, mode_t mode)
+                             _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (creat, int, (const char *filename, mode_t mode));
+# elif defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef creat
+#   define creat _creat
+#  endif
+_GL_CXXALIAS_MDA (creat, int, (const char *filename, mode_t mode));
+# else
+_GL_CXXALIAS_SYS (creat, int, (const char *filename, mode_t mode));
+# endif
+_GL_CXXALIASWARN (creat);
+#elif defined GNULIB_POSIXCHECK
+# undef creat
+/* Assume creat is always declared.  */
+_GL_WARN_ON_USE (creat, "creat is not always POSIX compliant - "
+                 "use gnulib module creat for portability");
+#elif @GNULIB_MDA_CREAT@
+/* On native Windows, map 'creat' to '_creat', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::creat always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef creat
+#   define creat _creat
+#  endif
+/* Need to cast, because in mingw the last argument is 'int mode'.  */
+_GL_CXXALIAS_MDA_CAST (creat, int, (const char *filename, mode_t mode));
+# else
+_GL_CXXALIAS_SYS (creat, int, (const char *filename, mode_t mode));
+# endif
+_GL_CXXALIASWARN (creat);
+#endif
+
+#if @GNULIB_FCNTL@
+# if @REPLACE_FCNTL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fcntl
+#   define fcntl rpl_fcntl
+#  endif
+_GL_FUNCDECL_RPL (fcntl, int, (int fd, int action, ...));
+_GL_CXXALIAS_RPL (fcntl, int, (int fd, int action, ...));
+#  if !GNULIB_defined_rpl_fcntl
+#   define GNULIB_defined_rpl_fcntl 1
+#  endif
+# else
+#  if !@HAVE_FCNTL@
+_GL_FUNCDECL_SYS (fcntl, int, (int fd, int action, ...));
+#   if !GNULIB_defined_fcntl
+#    define GNULIB_defined_fcntl 1
+#   endif
+#  endif
+_GL_CXXALIAS_SYS (fcntl, int, (int fd, int action, ...));
+# endif
+_GL_CXXALIASWARN (fcntl);
+#elif defined GNULIB_POSIXCHECK
+# undef fcntl
+# if HAVE_RAW_DECL_FCNTL
+_GL_WARN_ON_USE (fcntl, "fcntl is not always POSIX compliant - "
+                 "use gnulib module fcntl for portability");
+# endif
+#endif
+
+#if @GNULIB_OPEN@
+# if @REPLACE_OPEN@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef open
+#   define open rpl_open
+#  endif
+_GL_FUNCDECL_RPL (open, int, (const char *filename, int flags, ...)
+                             _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (open, int, (const char *filename, int flags, ...));
+# elif defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef open
+#   define open _open
+#  endif
+_GL_CXXALIAS_MDA (open, int, (const char *filename, int flags, ...));
+# else
+_GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...));
+# endif
+/* On HP-UX 11, in C++ mode, open() is defined as an inline function with a
+   default argument.  _GL_CXXALIASWARN does not work in this case.  */
+# if !defined __hpux
+_GL_CXXALIASWARN (open);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef open
+/* Assume open is always declared.  */
+_GL_WARN_ON_USE (open, "open is not always POSIX compliant - "
+                 "use gnulib module open for portability");
+#elif @GNULIB_MDA_OPEN@
+/* On native Windows, map 'open' to '_open', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::open always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef open
+#   define open _open
+#  endif
+_GL_CXXALIAS_MDA (open, int, (const char *filename, int flags, ...));
+# else
+_GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...));
+# endif
+# if !defined __hpux
+_GL_CXXALIASWARN (open);
+# endif
+#endif
+
+#if @GNULIB_OPENAT@
+# if @REPLACE_OPENAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef openat
+#   define openat rpl_openat
+#  endif
+_GL_FUNCDECL_RPL (openat, int,
+                  (int fd, char const *file, int flags, /* mode_t mode */ ...)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (openat, int,
+                  (int fd, char const *file, int flags, /* mode_t mode */ ...));
+# else
+#  if !@HAVE_OPENAT@
+_GL_FUNCDECL_SYS (openat, int,
+                  (int fd, char const *file, int flags, /* mode_t mode */ ...)
+                  _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (openat, int,
+                  (int fd, char const *file, int flags, /* mode_t mode */ ...));
+# endif
+_GL_CXXALIASWARN (openat);
+#elif defined GNULIB_POSIXCHECK
+# undef openat
+# if HAVE_RAW_DECL_OPENAT
+_GL_WARN_ON_USE (openat, "openat is not portable - "
+                 "use gnulib module openat for portability");
+# endif
+#endif
+
+
+/* Fix up the FD_* macros, only known to be missing on mingw.  */
+
+#ifndef FD_CLOEXEC
+# define FD_CLOEXEC 1
+#endif
+
+/* Fix up the supported F_* macros.  Intentionally leave other F_*
+   macros undefined.  Only known to be missing on mingw.  */
+
+#ifndef F_DUPFD_CLOEXEC
+# define F_DUPFD_CLOEXEC 0x40000000
+/* Witness variable: 1 if gnulib defined F_DUPFD_CLOEXEC, 0 otherwise.  */
+# define GNULIB_defined_F_DUPFD_CLOEXEC 1
+#else
+# define GNULIB_defined_F_DUPFD_CLOEXEC 0
+#endif
+
+#ifndef F_DUPFD
+# define F_DUPFD 1
+#endif
+
+#ifndef F_GETFD
+# define F_GETFD 2
+#endif
+
+/* Fix up the O_* macros.  */
+
+/* AIX 7.1 with XL C 12.1 defines O_CLOEXEC, O_NOFOLLOW, and O_TTY_INIT
+   to values outside 'int' range, so omit these misdefinitions.
+   But avoid namespace pollution on non-AIX systems.  */
+#ifdef _AIX
+# include <limits.h>
+# if defined O_CLOEXEC && ! (INT_MIN <= O_CLOEXEC && O_CLOEXEC <= INT_MAX)
+#  undef O_CLOEXEC
+# endif
+# if defined O_NOFOLLOW && ! (INT_MIN <= O_NOFOLLOW && O_NOFOLLOW <= INT_MAX)
+#  undef O_NOFOLLOW
+# endif
+# if defined O_TTY_INIT && ! (INT_MIN <= O_TTY_INIT && O_TTY_INIT <= INT_MAX)
+#  undef O_TTY_INIT
+# endif
+#endif
+
+#if !defined O_DIRECT && defined O_DIRECTIO
+/* Tru64 spells it 'O_DIRECTIO'.  */
+# define O_DIRECT O_DIRECTIO
+#endif
+
+#if !defined O_CLOEXEC && defined O_NOINHERIT
+/* Mingw spells it 'O_NOINHERIT'.  */
+# define O_CLOEXEC O_NOINHERIT
+#endif
+
+#ifndef O_CLOEXEC
+# define O_CLOEXEC 0x40000000 /* Try to not collide with system O_* flags.  */
+# define GNULIB_defined_O_CLOEXEC 1
+#else
+# define GNULIB_defined_O_CLOEXEC 0
+#endif
+
+#ifndef O_DIRECT
+# define O_DIRECT 0
+#endif
+
+#ifndef O_DIRECTORY
+# define O_DIRECTORY 0
+#endif
+
+#ifndef O_DSYNC
+# define O_DSYNC 0
+#endif
+
+#ifndef O_EXEC
+# define O_EXEC O_RDONLY /* This is often close enough in older systems.  */
+#endif
+
+#ifndef O_IGNORE_CTTY
+# define O_IGNORE_CTTY 0
+#endif
+
+#ifndef O_NDELAY
+# define O_NDELAY 0
+#endif
+
+#ifndef O_NOATIME
+# define O_NOATIME 0
+#endif
+
+#ifndef O_NONBLOCK
+# define O_NONBLOCK O_NDELAY
+#endif
+
+/* If the gnulib module 'nonblocking' is in use, guarantee a working non-zero
+   value of O_NONBLOCK.  Otherwise, O_NONBLOCK is defined (above) to O_NDELAY
+   or to 0 as fallback.  */
+#if @GNULIB_NONBLOCKING@
+# if O_NONBLOCK
+#  define GNULIB_defined_O_NONBLOCK 0
+# else
+#  define GNULIB_defined_O_NONBLOCK 1
+#  undef O_NONBLOCK
+#  define O_NONBLOCK 0x40000000
+# endif
+#endif
+
+#ifndef O_NOCTTY
+# define O_NOCTTY 0
+#endif
+
+#ifndef O_NOFOLLOW
+# define O_NOFOLLOW 0
+#endif
+
+#ifndef O_NOLINK
+# define O_NOLINK 0
+#endif
+
+#ifndef O_NOLINKS
+# define O_NOLINKS 0
+#endif
+
+#ifndef O_NOTRANS
+# define O_NOTRANS 0
+#endif
+
+#ifndef O_RSYNC
+# define O_RSYNC 0
+#endif
+
+#ifndef O_SEARCH
+# define O_SEARCH O_RDONLY /* This is often close enough in older systems.  */
+#endif
+
+#ifndef O_SYNC
+# define O_SYNC 0
+#endif
+
+#ifndef O_TTY_INIT
+# define O_TTY_INIT 0
+#endif
+
+#if ~O_ACCMODE & (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH)
+# undef O_ACCMODE
+# define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH)
+#endif
+
+/* For systems that distinguish between text and binary I/O.
+   O_BINARY is usually declared in fcntl.h  */
+#if !defined O_BINARY && defined _O_BINARY
+  /* For MSC-compatible compilers.  */
+# define O_BINARY _O_BINARY
+# define O_TEXT _O_TEXT
+#endif
+
+#if defined __BEOS__ || defined __HAIKU__
+  /* BeOS 5 and Haiku have O_BINARY and O_TEXT, but they have no effect.  */
+# undef O_BINARY
+# undef O_TEXT
+#endif
+
+#ifndef O_BINARY
+# define O_BINARY 0
+# define O_TEXT 0
+#endif
+
+/* Fix up the AT_* macros.  */
+
+/* Work around a bug in Solaris 9 and 10: AT_FDCWD is positive.  Its
+   value exceeds INT_MAX, so its use as an int doesn't conform to the
+   C standard, and GCC and Sun C complain in some cases.  If the bug
+   is present, undef AT_FDCWD here, so it can be redefined below.  */
+#if 0 < AT_FDCWD && AT_FDCWD == 0xffd19553
+# undef AT_FDCWD
+#endif
+
+/* Use the same bit pattern as Solaris 9, but with the proper
+   signedness.  The bit pattern is important, in case this actually is
+   Solaris with the above workaround.  */
+#ifndef AT_FDCWD
+# define AT_FDCWD (-3041965)
+#endif
+
+/* Use the same values as Solaris 9.  This shouldn't matter, but
+   there's no real reason to differ.  */
+#ifndef AT_SYMLINK_NOFOLLOW
+# define AT_SYMLINK_NOFOLLOW 4096
+#endif
+
+#ifndef AT_REMOVEDIR
+# define AT_REMOVEDIR 1
+#endif
+
+/* Solaris 9 lacks these two, so just pick unique values.  */
+#ifndef AT_SYMLINK_FOLLOW
+# define AT_SYMLINK_FOLLOW 2
+#endif
+
+#ifndef AT_EACCESS
+# define AT_EACCESS 4
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_FCNTL_H */
+#endif /* _@GUARD_PREFIX@_FCNTL_H */
+#endif
diff --git a/src/grep/lib/fd-hook.c b/src/grep/lib/fd-hook.c
new file mode 100644
index 0000000..75b1626
--- /dev/null
+++ b/src/grep/lib/fd-hook.c
@@ -0,0 +1,116 @@
+/* Hook for making file descriptor functions close(), ioctl() extensible.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2009.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "fd-hook.h"
+
+#include <stdlib.h>
+
+/* Currently, this entire code is only needed for the handling of sockets
+   on native Windows platforms.  */
+#if WINDOWS_SOCKETS
+
+/* The first and last link in the doubly linked list.
+   Initially the list is empty.  */
+static struct fd_hook anchor = { &anchor, &anchor, NULL, NULL };
+
+int
+execute_close_hooks (const struct fd_hook *remaining_list, gl_close_fn primary,
+                     int fd)
+{
+  if (remaining_list == &anchor)
+    /* End of list reached.  */
+    return primary (fd);
+  else
+    return remaining_list->private_close_fn (remaining_list->private_next,
+                                             primary, fd);
+}
+
+int
+execute_all_close_hooks (gl_close_fn primary, int fd)
+{
+  return execute_close_hooks (anchor.private_next, primary, fd);
+}
+
+int
+execute_ioctl_hooks (const struct fd_hook *remaining_list, gl_ioctl_fn primary,
+                     int fd, int request, void *arg)
+{
+  if (remaining_list == &anchor)
+    /* End of list reached.  */
+    return primary (fd, request, arg);
+  else
+    return remaining_list->private_ioctl_fn (remaining_list->private_next,
+                                             primary, fd, request, arg);
+}
+
+int
+execute_all_ioctl_hooks (gl_ioctl_fn primary,
+                         int fd, int request, void *arg)
+{
+  return execute_ioctl_hooks (anchor.private_next, primary, fd, request, arg);
+}
+
+void
+register_fd_hook (close_hook_fn close_hook, ioctl_hook_fn ioctl_hook, struct fd_hook *link)
+{
+  if (close_hook == NULL)
+    close_hook = execute_close_hooks;
+  if (ioctl_hook == NULL)
+    ioctl_hook = execute_ioctl_hooks;
+
+  if (link->private_next == NULL && link->private_prev == NULL)
+    {
+      /* Add the link to the doubly linked list.  */
+      link->private_next = anchor.private_next;
+      link->private_prev = &anchor;
+      link->private_close_fn = close_hook;
+      link->private_ioctl_fn = ioctl_hook;
+      anchor.private_next->private_prev = link;
+      anchor.private_next = link;
+    }
+  else
+    {
+      /* The link is already in use.  */
+      if (link->private_close_fn != close_hook
+          || link->private_ioctl_fn != ioctl_hook)
+        abort ();
+    }
+}
+
+void
+unregister_fd_hook (struct fd_hook *link)
+{
+  struct fd_hook *next = link->private_next;
+  struct fd_hook *prev = link->private_prev;
+
+  if (next != NULL && prev != NULL)
+    {
+      /* The link is in use.  Remove it from the doubly linked list.  */
+      prev->private_next = next;
+      next->private_prev = prev;
+      /* Clear the link, to mark it unused.  */
+      link->private_next = NULL;
+      link->private_prev = NULL;
+      link->private_close_fn = NULL;
+      link->private_ioctl_fn = NULL;
+    }
+}
+
+#endif
diff --git a/src/grep/lib/fd-hook.h b/src/grep/lib/fd-hook.h
new file mode 100644
index 0000000..98e2a52
--- /dev/null
+++ b/src/grep/lib/fd-hook.h
@@ -0,0 +1,119 @@
+/* Hook for making file descriptor functions close(), ioctl() extensible.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+
+#ifndef FD_HOOK_H
+#define FD_HOOK_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Currently, this entire code is only needed for the handling of sockets
+   on native Windows platforms.  */
+#if WINDOWS_SOCKETS
+
+
+/* Type of function that closes FD.  */
+typedef int (*gl_close_fn) (int fd);
+
+/* Type of function that applies a control request to FD.  */
+typedef int (*gl_ioctl_fn) (int fd, int request, void *arg);
+
+/* An element of the list of file descriptor hooks.
+   In CLOS (Common Lisp Object System) speak, it consists of an "around"
+   method for the close() function and an "around" method for the ioctl()
+   function.
+   The fields of this structure are considered private.  */
+struct fd_hook
+{
+  /* Doubly linked list.  */
+  struct fd_hook *private_next;
+  struct fd_hook *private_prev;
+  /* Function that treats the types of FD that it knows about and calls
+     execute_close_hooks (REMAINING_LIST, PRIMARY, FD) as a fallback.  */
+  int (*private_close_fn) (const struct fd_hook *remaining_list,
+                           gl_close_fn primary,
+                           int fd);
+  /* Function that treats the types of FD that it knows about and calls
+     execute_ioctl_hooks (REMAINING_LIST, PRIMARY, FD, REQUEST, ARG) as a
+     fallback.  */
+  int (*private_ioctl_fn) (const struct fd_hook *remaining_list,
+                           gl_ioctl_fn primary,
+                           int fd, int request, void *arg);
+};
+
+/* This type of function closes FD, applying special knowledge for the FD
+   types it knows about, and calls
+   execute_close_hooks (REMAINING_LIST, PRIMARY, FD)
+   for the other FD types.
+   In CLOS speak, REMAINING_LIST is the remaining list of "around" methods,
+   and PRIMARY is the "primary" method for close().  */
+typedef int (*close_hook_fn) (const struct fd_hook *remaining_list,
+                              gl_close_fn primary,
+                              int fd);
+
+/* Execute the close hooks in REMAINING_LIST, with PRIMARY as "primary" method.
+   Return 0 or -1, like close() would do.  */
+extern int execute_close_hooks (const struct fd_hook *remaining_list,
+                                gl_close_fn primary,
+                                int fd);
+
+/* Execute all close hooks, with PRIMARY as "primary" method.
+   Return 0 or -1, like close() would do.  */
+extern int execute_all_close_hooks (gl_close_fn primary, int fd);
+
+/* This type of function applies a control request to FD, applying special
+   knowledge for the FD types it knows about, and calls
+   execute_ioctl_hooks (REMAINING_LIST, PRIMARY, FD, REQUEST, ARG)
+   for the other FD types.
+   In CLOS speak, REMAINING_LIST is the remaining list of "around" methods,
+   and PRIMARY is the "primary" method for ioctl().  */
+typedef int (*ioctl_hook_fn) (const struct fd_hook *remaining_list,
+                              gl_ioctl_fn primary,
+                              int fd, int request, void *arg);
+
+/* Execute the ioctl hooks in REMAINING_LIST, with PRIMARY as "primary" method.
+   Return 0 or -1, like ioctl() would do.  */
+extern int execute_ioctl_hooks (const struct fd_hook *remaining_list,
+                                gl_ioctl_fn primary,
+                                int fd, int request, void *arg);
+
+/* Execute all ioctl hooks, with PRIMARY as "primary" method.
+   Return 0 or -1, like ioctl() would do.  */
+extern int execute_all_ioctl_hooks (gl_ioctl_fn primary,
+                                    int fd, int request, void *arg);
+
+/* Add a function pair to the list of file descriptor hooks.
+   CLOSE_HOOK and IOCTL_HOOK may be NULL, indicating no change.
+   The LINK variable points to a piece of memory which is guaranteed to be
+   accessible until the corresponding call to unregister_fd_hook.  */
+extern void register_fd_hook (close_hook_fn close_hook, ioctl_hook_fn ioctl_hook,
+                              struct fd_hook *link);
+
+/* Removes a hook from the list of file descriptor hooks.  */
+extern void unregister_fd_hook (struct fd_hook *link);
+
+
+#endif
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* FD_HOOK_H */
diff --git a/src/grep/lib/fd-safer-flag.c b/src/grep/lib/fd-safer-flag.c
new file mode 100644
index 0000000..bfaef4d
--- /dev/null
+++ b/src/grep/lib/fd-safer-flag.c
@@ -0,0 +1,52 @@
+/* Adjust a file descriptor result so that it avoids clobbering
+   STD{IN,OUT,ERR}_FILENO, with specific flags.
+
+   Copyright (C) 2005-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert and Eric Blake.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "unistd-safer.h"
+
+#include <errno.h>
+#include <unistd.h>
+
+/* Return FD, unless FD would be a copy of standard input, output, or
+   error; in that case, return a duplicate of FD, closing FD.  If FLAG
+   contains O_CLOEXEC, the returned FD will have close-on-exec
+   semantics.  On failure to duplicate, close FD, set errno, and
+   return -1.  Preserve errno if FD is negative, so that the caller
+   can always inspect errno when the returned value is negative.
+
+   This function is usefully wrapped around functions that return file
+   descriptors, e.g., fd_safer_flag (open ("file", O_RDONLY | flag), flag).  */
+
+int
+fd_safer_flag (int fd, int flag)
+{
+  if (STDIN_FILENO <= fd && fd <= STDERR_FILENO)
+    {
+      int f = dup_safer_flag (fd, flag);
+      int e = errno;
+      close (fd);
+      errno = e;
+      fd = f;
+    }
+
+  return fd;
+}
diff --git a/src/grep/lib/fd-safer.c b/src/grep/lib/fd-safer.c
new file mode 100644
index 0000000..487b039
--- /dev/null
+++ b/src/grep/lib/fd-safer.c
@@ -0,0 +1,49 @@
+/* Return a safer copy of a file descriptor.
+
+   Copyright (C) 2005-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+#include <config.h>
+
+#include "unistd-safer.h"
+
+#include <errno.h>
+#include <unistd.h>
+
+/* Return FD, unless FD would be a copy of standard input, output, or
+   error; in that case, return a duplicate of FD, closing FD.  On
+   failure to duplicate, close FD, set errno, and return -1.  Preserve
+   errno if FD is negative, so that the caller can always inspect
+   errno when the returned value is negative.
+
+   This function is usefully wrapped around functions that return file
+   descriptors, e.g., fd_safer (open ("file", O_RDONLY)).  */
+
+int
+fd_safer (int fd)
+{
+  if (STDIN_FILENO <= fd && fd <= STDERR_FILENO)
+    {
+      int f = dup_safer (fd);
+      int e = errno;
+      close (fd);
+      errno = e;
+      fd = f;
+    }
+
+  return fd;
+}
diff --git a/src/grep/lib/fdopendir.c b/src/grep/lib/fdopendir.c
new file mode 100644
index 0000000..451b4e1
--- /dev/null
+++ b/src/grep/lib/fdopendir.c
@@ -0,0 +1,249 @@
+/* provide a replacement fdopendir function
+   Copyright (C) 2004-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering */
+
+#include <config.h>
+
+#include <dirent.h>
+
+#include <stdlib.h>
+#include <unistd.h>
+
+#if !HAVE_FDOPENDIR
+
+# include "openat.h"
+# include "openat-priv.h"
+# include "save-cwd.h"
+
+# if GNULIB_DIRENT_SAFER
+#  include "dirent--.h"
+# endif
+
+# ifndef REPLACE_FCHDIR
+#  define REPLACE_FCHDIR 0
+# endif
+
+static DIR *fdopendir_with_dup (int, int, struct saved_cwd const *);
+static DIR *fd_clone_opendir (int, struct saved_cwd const *);
+
+/* Replacement for POSIX fdopendir.
+
+   First, try to simulate it via opendir ("/proc/self/fd/...").  Failing
+   that, simulate it by using fchdir metadata, or by doing
+   save_cwd/fchdir/opendir(".")/restore_cwd.
+   If either the save_cwd or the restore_cwd fails (relatively unlikely),
+   then give a diagnostic and exit nonzero.
+
+   If successful, the resulting stream is based on FD in
+   implementations where streams are based on file descriptors and in
+   applications where no other thread or signal handler allocates or
+   frees file descriptors.  In other cases, consult dirfd on the result
+   to find out whether FD is still being used.
+
+   Otherwise, this function works just like POSIX fdopendir.
+
+   W A R N I N G:
+
+   Unlike other fd-related functions, this one places constraints on FD.
+   If this function returns successfully, FD is under control of the
+   dirent.h system, and the caller should not close or modify the state of
+   FD other than by the dirent.h functions.  */
+# ifdef __KLIBC__
+#  include <InnoTekLIBC/backend.h>
+
+DIR *
+fdopendir (int fd)
+{
+  char path[_MAX_PATH];
+  DIR *dirp;
+
+  /* Get a path from fd */
+  if (__libc_Back_ioFHToPath (fd, path, sizeof (path)))
+    return NULL;
+
+  dirp = opendir (path);
+  if (!dirp)
+    return NULL;
+
+  /* Unregister fd registered by opendir() */
+  _gl_unregister_dirp_fd (dirfd (dirp));
+
+  /* Register our fd */
+  if (_gl_register_dirp_fd (fd, dirp))
+    {
+      int saved_errno = errno;
+
+      closedir (dirp);
+
+      errno = saved_errno;
+
+      dirp = NULL;
+    }
+
+  return dirp;
+}
+# else
+DIR *
+fdopendir (int fd)
+{
+  DIR *dir = fdopendir_with_dup (fd, -1, NULL);
+
+  if (! REPLACE_FCHDIR && ! dir)
+    {
+      int saved_errno = errno;
+      if (EXPECTED_ERRNO (saved_errno))
+        {
+          struct saved_cwd cwd;
+          if (save_cwd (&cwd) != 0)
+            openat_save_fail (errno);
+          dir = fdopendir_with_dup (fd, -1, &cwd);
+          saved_errno = errno;
+          free_cwd (&cwd);
+          errno = saved_errno;
+        }
+    }
+
+  return dir;
+}
+# endif
+
+/* Like fdopendir, except that if OLDER_DUPFD is not -1, it is known
+   to be a dup of FD which is less than FD - 1 and which will be
+   closed by the caller and not otherwise used by the caller.  This
+   function makes sure that FD is closed and all file descriptors less
+   than FD are open, and then calls fd_clone_opendir on a dup of FD.
+   That way, barring race conditions, fd_clone_opendir returns a
+   stream whose file descriptor is FD.
+
+   If REPLACE_FCHDIR or CWD is null, use opendir ("/proc/self/fd/...",
+   falling back on fchdir metadata.  Otherwise, CWD is a saved version
+   of the working directory; use fchdir/opendir(".")/restore_cwd(CWD).  */
+static DIR *
+fdopendir_with_dup (int fd, int older_dupfd, struct saved_cwd const *cwd)
+{
+  int dupfd = dup (fd);
+  if (dupfd < 0 && errno == EMFILE)
+    dupfd = older_dupfd;
+  if (dupfd < 0)
+    return NULL;
+  else
+    {
+      DIR *dir;
+      int saved_errno;
+      if (dupfd < fd - 1 && dupfd != older_dupfd)
+        {
+          dir = fdopendir_with_dup (fd, dupfd, cwd);
+          saved_errno = errno;
+        }
+      else
+        {
+          close (fd);
+          dir = fd_clone_opendir (dupfd, cwd);
+          saved_errno = errno;
+          if (! dir)
+            {
+              int fd1 = dup (dupfd);
+              if (fd1 != fd)
+                openat_save_fail (fd1 < 0 ? errno : EBADF);
+            }
+        }
+
+      if (dupfd != older_dupfd)
+        close (dupfd);
+      errno = saved_errno;
+      return dir;
+    }
+}
+
+/* Like fdopendir, except the result controls a clone of FD.  It is
+   the caller's responsibility both to close FD and (if the result is
+   not null) to closedir the result.  */
+static DIR *
+fd_clone_opendir (int fd, struct saved_cwd const *cwd)
+{
+  if (REPLACE_FCHDIR || ! cwd)
+    {
+      DIR *dir = NULL;
+      int saved_errno = EOPNOTSUPP;
+      char buf[OPENAT_BUFFER_SIZE];
+      char *proc_file = openat_proc_name (buf, fd, ".");
+      if (proc_file)
+        {
+          dir = opendir (proc_file);
+          saved_errno = errno;
+          if (proc_file != buf)
+            free (proc_file);
+        }
+# if REPLACE_FCHDIR
+      if (! dir && EXPECTED_ERRNO (saved_errno))
+        {
+          char const *name = _gl_directory_name (fd);
+          DIR *dp = name ? opendir (name) : NULL;
+
+          /* The caller has done an elaborate dance to arrange for opendir to
+             consume just the right file descriptor.  If dirfd returns -1,
+             though, we're on a system like mingw where opendir does not
+             consume a file descriptor.  Consume it via 'dup' instead.  */
+          if (dp && dirfd (dp) < 0)
+            dup (fd);
+
+          return dp;
+        }
+# endif
+      errno = saved_errno;
+      return dir;
+    }
+  else
+    {
+      if (fchdir (fd) != 0)
+        return NULL;
+      else
+        {
+          DIR *dir = opendir (".");
+          int saved_errno = errno;
+          if (restore_cwd (cwd) != 0)
+            openat_restore_fail (errno);
+          errno = saved_errno;
+          return dir;
+        }
+    }
+}
+
+#else /* HAVE_FDOPENDIR */
+
+# include <errno.h>
+# include <sys/stat.h>
+
+# undef fdopendir
+
+/* Like fdopendir, but work around GNU/Hurd bug by validating FD.  */
+
+DIR *
+rpl_fdopendir (int fd)
+{
+  struct stat st;
+  if (fstat (fd, &st))
+    return NULL;
+  if (!S_ISDIR (st.st_mode))
+    {
+      errno = ENOTDIR;
+      return NULL;
+    }
+  return fdopendir (fd);
+}
+
+#endif /* HAVE_FDOPENDIR */
diff --git a/src/grep/lib/filename.h b/src/grep/lib/filename.h
new file mode 100644
index 0000000..dafe3df
--- /dev/null
+++ b/src/grep/lib/filename.h
@@ -0,0 +1,112 @@
+/* Basic filename support macros.
+   Copyright (C) 2001-2004, 2007-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+/* From Paul Eggert and Jim Meyering.  */
+
+#ifndef _FILENAME_H
+#define _FILENAME_H
+
+#include <string.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Filename support.
+   ISSLASH(C)                  tests whether C is a directory separator
+                               character.
+   HAS_DEVICE(Filename)        tests whether Filename contains a device
+                               specification.
+   FILE_SYSTEM_PREFIX_LEN(Filename)  length of the device specification
+                                     at the beginning of Filename,
+                                     index of the part consisting of
+                                     alternating components and slashes.
+   FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
+                               1 when a non-empty device specification
+                               can be followed by an empty or relative
+                               part,
+                               0 when a non-empty device specification
+                               must be followed by a slash,
+                               0 when device specification don't exist.
+   IS_ABSOLUTE_FILE_NAME(Filename)
+                               tests whether Filename is independent of
+                               any notion of "current directory".
+   IS_RELATIVE_FILE_NAME(Filename)
+                               tests whether Filename may be concatenated
+                               to a directory filename.
+   Note: On native Windows, OS/2, DOS, "c:" is neither an absolute nor a
+   relative file name!
+   IS_FILE_NAME_WITH_DIR(Filename)  tests whether Filename contains a device
+                                    or directory specification.
+ */
+#if defined _WIN32 || defined __CYGWIN__ \
+    || defined __EMX__ || defined __MSDOS__ || defined __DJGPP__
+  /* Native Windows, Cygwin, OS/2, DOS */
+# define ISSLASH(C) ((C) == '/' || (C) == '\\')
+  /* Internal macro: Tests whether a character is a drive letter.  */
+# define _IS_DRIVE_LETTER(C) \
+    (((C) >= 'A' && (C) <= 'Z') || ((C) >= 'a' && (C) <= 'z'))
+  /* Help the compiler optimizing it.  This assumes ASCII.  */
+# undef _IS_DRIVE_LETTER
+# define _IS_DRIVE_LETTER(C) \
+    (((unsigned int) (C) | ('a' - 'A')) - 'a' <= 'z' - 'a')
+# define HAS_DEVICE(Filename) \
+    (_IS_DRIVE_LETTER ((Filename)[0]) && (Filename)[1] == ':')
+# define FILE_SYSTEM_PREFIX_LEN(Filename) (HAS_DEVICE (Filename) ? 2 : 0)
+# ifdef __CYGWIN__
+#  define FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE 0
+# else
+   /* On native Windows, OS/2, DOS, the system has the notion of a
+      "current directory" on each drive.  */
+#  define FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE 1
+# endif
+# if FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
+#  define IS_ABSOLUTE_FILE_NAME(Filename) \
+     ISSLASH ((Filename)[FILE_SYSTEM_PREFIX_LEN (Filename)])
+# else
+#  define IS_ABSOLUTE_FILE_NAME(Filename) \
+     (ISSLASH ((Filename)[0]) || HAS_DEVICE (Filename))
+# endif
+# define IS_RELATIVE_FILE_NAME(Filename) \
+    (! (ISSLASH ((Filename)[0]) || HAS_DEVICE (Filename)))
+# define IS_FILE_NAME_WITH_DIR(Filename) \
+    (strchr ((Filename), '/') != NULL || strchr ((Filename), '\\') != NULL \
+     || HAS_DEVICE (Filename))
+#else
+  /* Unix */
+# define ISSLASH(C) ((C) == '/')
+# define HAS_DEVICE(Filename) ((void) (Filename), 0)
+# define FILE_SYSTEM_PREFIX_LEN(Filename) ((void) (Filename), 0)
+# define FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE 0
+# define IS_ABSOLUTE_FILE_NAME(Filename) ISSLASH ((Filename)[0])
+# define IS_RELATIVE_FILE_NAME(Filename) (! ISSLASH ((Filename)[0]))
+# define IS_FILE_NAME_WITH_DIR(Filename) (strchr ((Filename), '/') != NULL)
+#endif
+
+/* Deprecated macros.  For backward compatibility with old users of the
+   'filename' module.  */
+#define IS_ABSOLUTE_PATH IS_ABSOLUTE_FILE_NAME
+#define IS_PATH_WITH_DIR IS_FILE_NAME_WITH_DIR
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _FILENAME_H */
diff --git a/src/grep/lib/filenamecat-lgpl.c b/src/grep/lib/filenamecat-lgpl.c
new file mode 100644
index 0000000..d52dc80
--- /dev/null
+++ b/src/grep/lib/filenamecat-lgpl.c
@@ -0,0 +1,90 @@
+/* Concatenate two arbitrary file names.
+
+   Copyright (C) 1996-2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "filenamecat.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "basename-lgpl.h"
+#include "filename.h"
+
+#if ! HAVE_MEMPCPY && ! defined mempcpy
+# define mempcpy(D, S, N) ((void *) ((char *) memcpy (D, S, N) + (N)))
+#endif
+
+/* Concatenate two file name components, DIR and BASE, in
+   newly-allocated storage and return the result.
+   The resulting file name F is such that the commands "ls F" and "(cd
+   DIR; ls ./BASE)" refer to the same file.  If necessary, put
+   a separator between DIR and BASE in the result.  Typically this
+   separator is "/", but in rare cases it might be ".".
+   In any case, if BASE_IN_RESULT is non-NULL, set
+   *BASE_IN_RESULT to point to the copy of BASE at the end of the
+   returned concatenation.
+
+   If malloc fails, return NULL with errno set.  */
+
+char *
+mfile_name_concat (char const *dir, char const *base, char **base_in_result)
+{
+  char const *dirbase = last_component (dir);
+  size_t dirbaselen = base_len (dirbase);
+  size_t dirlen = dirbase - dir + dirbaselen;
+  size_t baselen = strlen (base);
+  char sep = '\0';
+  if (dirbaselen)
+    {
+      /* DIR is not a file system root, so separate with / if needed.  */
+      if (! ISSLASH (dir[dirlen - 1]) && ! ISSLASH (*base))
+        sep = '/';
+    }
+  else if (ISSLASH (*base))
+    {
+      /* DIR is a file system root and BASE begins with a slash, so
+         separate with ".".  For example, if DIR is "/" and BASE is
+         "/foo" then return "/./foo", as "//foo" would be wrong on
+         some POSIX systems.  A fancier algorithm could omit "." in
+         some cases but is not worth the trouble.  */
+      sep = '.';
+    }
+
+  char *p_concat = malloc (dirlen + (sep != '\0')  + baselen + 1);
+  if (p_concat == NULL)
+    return NULL;
+
+  {
+    char *p;
+
+    p = mempcpy (p_concat, dir, dirlen);
+    *p = sep;
+    p += sep != '\0';
+
+    if (base_in_result)
+      *base_in_result = p;
+
+    p = mempcpy (p, base, baselen);
+    *p = '\0';
+  }
+
+  return p_concat;
+}
diff --git a/src/grep/lib/filenamecat.h b/src/grep/lib/filenamecat.h
new file mode 100644
index 0000000..e5acb15
--- /dev/null
+++ b/src/grep/lib/filenamecat.h
@@ -0,0 +1,32 @@
+/* Concatenate two arbitrary file names.
+
+   Copyright (C) 1996-1997, 2003, 2005, 2007, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering.  */
+
+#include <stdlib.h>
+
+#if GNULIB_FILENAMECAT
+char *file_name_concat (char const *dir, char const *base,
+                        char **base_in_result)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_RETURNS_NONNULL;
+#endif
+
+char *mfile_name_concat (char const *dir, char const *base,
+                         char **base_in_result)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE;
diff --git a/src/grep/lib/flexmember.h b/src/grep/lib/flexmember.h
new file mode 100644
index 0000000..1b19a2b
--- /dev/null
+++ b/src/grep/lib/flexmember.h
@@ -0,0 +1,60 @@
+/* Sizes of structs with flexible array members.
+
+   Copyright 2016-2021 Free Software Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.
+
+   Written by Paul Eggert.  */
+
+#include <stddef.h>
+
+/* Nonzero multiple of alignment of TYPE, suitable for FLEXSIZEOF below.
+   On older platforms without _Alignof, use a pessimistic bound that is
+   safe in practice even if FLEXIBLE_ARRAY_MEMBER is 1.
+   On newer platforms, use _Alignof to get a tighter bound.  */
+
+#if !defined __STDC_VERSION__ || __STDC_VERSION__ < 201112
+# define FLEXALIGNOF(type) (sizeof (type) & ~ (sizeof (type) - 1))
+#else
+# define FLEXALIGNOF(type) _Alignof (type)
+#endif
+
+/* Yield a properly aligned upper bound on the size of a struct of
+   type TYPE with a flexible array member named MEMBER that is
+   followed by N bytes of other data.  The result is suitable as an
+   argument to malloc.  For example:
+
+     struct s { int n; char d[FLEXIBLE_ARRAY_MEMBER]; };
+     struct s *p = malloc (FLEXSIZEOF (struct s, d, n * sizeof (char)));
+
+   FLEXSIZEOF (TYPE, MEMBER, N) is not simply (sizeof (TYPE) + N),
+   since FLEXIBLE_ARRAY_MEMBER may be 1 on pre-C11 platforms.  Nor is
+   it simply (offsetof (TYPE, MEMBER) + N), as that might yield a size
+   that causes malloc to yield a pointer that is not properly aligned
+   for TYPE; for example, if sizeof (int) == alignof (int) == 4,
+   malloc (offsetof (struct s, d) + 3 * sizeof (char)) is equivalent
+   to malloc (7) and might yield a pointer that is not a multiple of 4
+   (which means the pointer is not properly aligned for struct s),
+   whereas malloc (FLEXSIZEOF (struct s, d, 3 * sizeof (char))) is
+   equivalent to malloc (8) and must yield a pointer that is a
+   multiple of 4.
+
+   Yield a value less than N if and only if arithmetic overflow occurs.  */
+
+#define FLEXSIZEOF(type, member, n) \
+   ((offsetof (type, member) + FLEXALIGNOF (type) - 1 + (n)) \
+    & ~ (FLEXALIGNOF (type) - 1))
diff --git a/src/grep/lib/fnmatch.c b/src/grep/lib/fnmatch.c
new file mode 100644
index 0000000..b8a71f1
--- /dev/null
+++ b/src/grep/lib/fnmatch.c
@@ -0,0 +1,361 @@
+/* Copyright (C) 1991-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _LIBC
+# include <libc-config.h>
+#endif
+
+/* Enable GNU extensions in fnmatch.h.  */
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE    1
+#endif
+
+#include <fnmatch.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <ctype.h>
+#include <string.h>
+#include <stdlib.h>
+#if defined _LIBC || HAVE_ALLOCA
+# include <alloca.h>
+#endif
+#include <wchar.h>
+#include <wctype.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+/* We need some of the locale data (the collation sequence information)
+   but there is no interface to get this information in general.  Therefore
+   we support a correct implementation only in glibc.  */
+#ifdef _LIBC
+# include "../locale/localeinfo.h"
+# include "../locale/coll-lookup.h"
+# include <shlib-compat.h>
+
+# define CONCAT(a,b) __CONCAT(a,b)
+# define btowc __btowc
+# define iswctype __iswctype
+# define mbsrtowcs __mbsrtowcs
+# define mempcpy __mempcpy
+# define strnlen __strnlen
+# define towlower __towlower
+# define wcscat __wcscat
+# define wcslen __wcslen
+# define wctype __wctype
+# define wmemchr __wmemchr
+# define wmempcpy __wmempcpy
+# define fnmatch __fnmatch
+extern int fnmatch (const char *pattern, const char *string, int flags);
+#endif
+
+#ifdef _LIBC
+# if __GNUC__ >= 7
+#  define FALLTHROUGH __attribute__ ((__fallthrough__))
+# else
+#  define FALLTHROUGH ((void) 0)
+# endif
+#else
+# include "attribute.h"
+#endif
+
+#include <intprops.h>
+#include <flexmember.h>
+
+#ifdef _LIBC
+typedef ptrdiff_t idx_t;
+#else
+# include "idx.h"
+#endif
+
+/* We often have to test for FNM_FILE_NAME and FNM_PERIOD being both set.  */
+#define NO_LEADING_PERIOD(flags) \
+  ((flags & (FNM_FILE_NAME | FNM_PERIOD)) == (FNM_FILE_NAME | FNM_PERIOD))
+
+#ifndef _LIBC
+# if HAVE_ALLOCA
+/* The OS usually guarantees only one guard page at the bottom of the stack,
+   and a page size can be as small as 4096 bytes.  So we cannot safely
+   allocate anything larger than 4096 bytes.  Also care for the possibility
+   of a few compiler-allocated temporary stack slots.  */
+#  define __libc_use_alloca(n) ((n) < 4032)
+# else
+/* Just use malloc.  */
+#  define __libc_use_alloca(n) false
+#  undef alloca
+#  define alloca(n) malloc (n)
+# endif
+# define alloca_account(size, avar) ((avar) += (size), alloca (size))
+#endif
+
+/* Provide support for user-defined character classes, based on the functions
+   from ISO C 90 amendment 1.  */
+#ifdef CHARCLASS_NAME_MAX
+# define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX
+#else
+/* This shouldn't happen but some implementation might still have this
+   problem.  Use a reasonable default value.  */
+# define CHAR_CLASS_MAX_LENGTH 256
+#endif
+
+#define IS_CHAR_CLASS(string) wctype (string)
+
+/* Avoid depending on library functions or files
+   whose names are inconsistent.  */
+
+/* Global variable.  */
+static int posixly_correct;
+
+/* Note that this evaluates C many times.  */
+#define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c))
+#define CHAR    char
+#define UCHAR   unsigned char
+#define INT     int
+#define FCT     internal_fnmatch
+#define EXT     ext_match
+#define END     end_pattern
+#define STRUCT  fnmatch_struct
+#define L_(CS)  CS
+#define BTOWC(C) btowc (C)
+#define STRLEN(S) strlen (S)
+#define STRCAT(D, S) strcat (D, S)
+#define MEMPCPY(D, S, N) mempcpy (D, S, N)
+#define MEMCHR(S, C, N) memchr (S, C, N)
+#define WIDE_CHAR_VERSION 0
+#ifdef _LIBC
+# include <locale/weight.h>
+# define FINDIDX findidx
+#endif
+#include "fnmatch_loop.c"
+
+
+#define FOLD(c) ((flags & FNM_CASEFOLD) ? towlower (c) : (c))
+#define CHAR    wchar_t
+#define UCHAR   wint_t
+#define INT     wint_t
+#define FCT     internal_fnwmatch
+#define EXT     ext_wmatch
+#define END     end_wpattern
+#define L_(CS)  L##CS
+#define BTOWC(C) (C)
+#define STRLEN(S) wcslen (S)
+#define STRCAT(D, S) wcscat (D, S)
+#define MEMPCPY(D, S, N) wmempcpy (D, S, N)
+#define MEMCHR(S, C, N) wmemchr (S, C, N)
+#define WIDE_CHAR_VERSION 1
+#ifdef _LIBC
+/* Change the name the header defines so it doesn't conflict with
+   the <locale/weight.h> version included above.  */
+# define findidx findidxwc
+# include <locale/weightwc.h>
+# undef findidx
+# define FINDIDX findidxwc
+#endif
+
+#undef IS_CHAR_CLASS
+/* We have to convert the wide character string in a multibyte string.  But
+   we know that the character class names consist of alphanumeric characters
+   from the portable character set, and since the wide character encoding
+   for a member of the portable character set is the same code point as
+   its single-byte encoding, we can use a simplified method to convert the
+   string to a multibyte character string.  */
+static wctype_t
+is_char_class (const wchar_t *wcs)
+{
+  char s[CHAR_CLASS_MAX_LENGTH + 1];
+  char *cp = s;
+
+  do
+    {
+      /* Test for a printable character from the portable character set.  */
+#ifdef _LIBC
+      if (*wcs < 0x20 || *wcs > 0x7e
+          || *wcs == 0x24 || *wcs == 0x40 || *wcs == 0x60)
+        return (wctype_t) 0;
+#else
+      switch (*wcs)
+        {
+        case L' ': case L'!': case L'"': case L'#': case L'%':
+        case L'&': case L'\'': case L'(': case L')': case L'*':
+        case L'+': case L',': case L'-': case L'.': case L'/':
+        case L'0': case L'1': case L'2': case L'3': case L'4':
+        case L'5': case L'6': case L'7': case L'8': case L'9':
+        case L':': case L';': case L'<': case L'=': case L'>':
+        case L'?':
+        case L'A': case L'B': case L'C': case L'D': case L'E':
+        case L'F': case L'G': case L'H': case L'I': case L'J':
+        case L'K': case L'L': case L'M': case L'N': case L'O':
+        case L'P': case L'Q': case L'R': case L'S': case L'T':
+        case L'U': case L'V': case L'W': case L'X': case L'Y':
+        case L'Z':
+        case L'[': case L'\\': case L']': case L'^': case L'_':
+        case L'a': case L'b': case L'c': case L'd': case L'e':
+        case L'f': case L'g': case L'h': case L'i': case L'j':
+        case L'k': case L'l': case L'm': case L'n': case L'o':
+        case L'p': case L'q': case L'r': case L's': case L't':
+        case L'u': case L'v': case L'w': case L'x': case L'y':
+        case L'z': case L'{': case L'|': case L'}': case L'~':
+          break;
+        default:
+          return (wctype_t) 0;
+        }
+#endif
+
+      /* Avoid overrunning the buffer.  */
+      if (cp == s + CHAR_CLASS_MAX_LENGTH)
+        return (wctype_t) 0;
+
+      *cp++ = (char) *wcs++;
+    }
+  while (*wcs != L'\0');
+
+  *cp = '\0';
+
+  return wctype (s);
+}
+#define IS_CHAR_CLASS(string) is_char_class (string)
+
+#include "fnmatch_loop.c"
+
+
+int
+fnmatch (const char *pattern, const char *string, int flags)
+{
+  if (__glibc_unlikely (MB_CUR_MAX != 1))
+    {
+      mbstate_t ps;
+      size_t n;
+      const char *p;
+      wchar_t *wpattern_malloc = NULL;
+      wchar_t *wpattern;
+      wchar_t *wstring_malloc = NULL;
+      wchar_t *wstring;
+      size_t alloca_used = 0;
+
+      /* Convert the strings into wide characters.  */
+      memset (&ps, '\0', sizeof (ps));
+      p = pattern;
+      n = strnlen (pattern, 1024);
+      if (__glibc_likely (n < 1024))
+        {
+          wpattern = (wchar_t *) alloca_account ((n + 1) * sizeof (wchar_t),
+                                                 alloca_used);
+          n = mbsrtowcs (wpattern, &p, n + 1, &ps);
+          if (__glibc_unlikely (n == (size_t) -1))
+            /* Something wrong.
+               XXX Do we have to set 'errno' to something which mbsrtows hasn't
+               already done?  */
+            return -1;
+          if (p)
+            {
+              memset (&ps, '\0', sizeof (ps));
+              goto prepare_wpattern;
+            }
+        }
+      else
+        {
+        prepare_wpattern:
+          n = mbsrtowcs (NULL, &pattern, 0, &ps);
+          if (__glibc_unlikely (n == (size_t) -1))
+            /* Something wrong.
+               XXX Do we have to set 'errno' to something which mbsrtows hasn't
+               already done?  */
+            return -1;
+          if (__glibc_unlikely (n >= (size_t) -1 / sizeof (wchar_t)))
+            {
+              __set_errno (ENOMEM);
+              return -2;
+            }
+          wpattern_malloc = wpattern
+            = (wchar_t *) malloc ((n + 1) * sizeof (wchar_t));
+          assert (mbsinit (&ps));
+          if (wpattern == NULL)
+            return -2;
+          (void) mbsrtowcs (wpattern, &pattern, n + 1, &ps);
+        }
+
+      assert (mbsinit (&ps));
+      n = strnlen (string, 1024);
+      p = string;
+      if (__glibc_likely (n < 1024))
+        {
+          wstring = (wchar_t *) alloca_account ((n + 1) * sizeof (wchar_t),
+                                                alloca_used);
+          n = mbsrtowcs (wstring, &p, n + 1, &ps);
+          if (__glibc_unlikely (n == (size_t) -1))
+            {
+              /* Something wrong.
+                 XXX Do we have to set 'errno' to something which
+                 mbsrtows hasn't already done?  */
+            free_return:
+              free (wpattern_malloc);
+              return -1;
+            }
+          if (p)
+            {
+              memset (&ps, '\0', sizeof (ps));
+              goto prepare_wstring;
+            }
+        }
+      else
+        {
+        prepare_wstring:
+          n = mbsrtowcs (NULL, &string, 0, &ps);
+          if (__glibc_unlikely (n == (size_t) -1))
+            /* Something wrong.
+               XXX Do we have to set 'errno' to something which mbsrtows hasn't
+               already done?  */
+            goto free_return;
+          if (__glibc_unlikely (n >= (size_t) -1 / sizeof (wchar_t)))
+            {
+              free (wpattern_malloc);
+              __set_errno (ENOMEM);
+              return -2;
+            }
+
+          wstring_malloc = wstring
+            = (wchar_t *) malloc ((n + 1) * sizeof (wchar_t));
+          if (wstring == NULL)
+            {
+              free (wpattern_malloc);
+              return -2;
+            }
+          assert (mbsinit (&ps));
+          (void) mbsrtowcs (wstring, &string, n + 1, &ps);
+        }
+
+      int res = internal_fnwmatch (wpattern, wstring, wstring + n,
+                                   flags & FNM_PERIOD, flags, NULL,
+                                   alloca_used);
+
+      free (wstring_malloc);
+      free (wpattern_malloc);
+
+      return res;
+    }
+
+  return internal_fnmatch (pattern, string, string + strlen (string),
+                           flags & FNM_PERIOD, flags, NULL, 0);
+}
+
+#undef fnmatch
+versioned_symbol (libc, __fnmatch, fnmatch, GLIBC_2_2_3);
+#if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_2_3)
+strong_alias (__fnmatch, __fnmatch_old)
+compat_symbol (libc, __fnmatch_old, fnmatch, GLIBC_2_0);
+#endif
+libc_hidden_ver (__fnmatch, fnmatch)
diff --git a/src/grep/lib/fnmatch.in.h b/src/grep/lib/fnmatch.in.h
new file mode 100644
index 0000000..146c0e4
--- /dev/null
+++ b/src/grep/lib/fnmatch.in.h
@@ -0,0 +1,116 @@
+/* Substitute for and wrapper around <fnmatch.h>.
+   Copyright (C) 1991-1993, 1996-1999, 2001-2003, 2005, 2007, 2009-2021 Free
+   Software Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _@GUARD_PREFIX@_FNMATCH_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard.  */
+#if @HAVE_FNMATCH_H@ && !@REPLACE_FNMATCH@
+# @INCLUDE_NEXT@ @NEXT_FNMATCH_H@
+#endif
+
+#ifndef _@GUARD_PREFIX@_FNMATCH_H
+#define _@GUARD_PREFIX@_FNMATCH_H
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+#if defined(KMK_GREP)
+# include "c++defs.h"
+#endif
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+#if defined(KMK_GREP)
+# include "arg-nonnull.h"
+#endif
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+#if !@HAVE_FNMATCH_H@ || @REPLACE_FNMATCH@
+
+/* We #undef these before defining them because some losing systems
+   (HP-UX A.08.07 for example) define these in <unistd.h>.  */
+#undef  FNM_PATHNAME
+#undef  FNM_NOESCAPE
+#undef  FNM_PERIOD
+
+/* Bits set in the FLAGS argument to 'fnmatch'.  */
+#define FNM_PATHNAME    (1 << 0) /* No wildcard can ever match '/'.  */
+#define FNM_NOESCAPE    (1 << 1) /* Backslashes don't quote special chars.  */
+#define FNM_PERIOD      (1 << 2) /* Leading '.' is matched only explicitly.  */
+
+#if !defined _POSIX_C_SOURCE || _POSIX_C_SOURCE < 2 || defined _GNU_SOURCE
+# define FNM_FILE_NAME   FNM_PATHNAME   /* Preferred GNU name.  */
+# define FNM_LEADING_DIR (1 << 3)       /* Ignore '/...' after a match.  */
+# define FNM_CASEFOLD    (1 << 4)       /* Compare without regard to case.  */
+# define FNM_EXTMATCH    (1 << 5)       /* Use ksh-like extended matching. */
+#endif
+
+/* Value returned by 'fnmatch' if STRING does not match PATTERN.  */
+#define FNM_NOMATCH     1
+
+/* This value is returned if the implementation does not support
+   'fnmatch'.  Since this is not the case here it will never be
+   returned but the conformance test suites still require the symbol
+   to be defined.  */
+#ifdef _XOPEN_SOURCE
+# define FNM_NOSYS      (-1)
+#endif
+
+#endif
+
+
+#if @GNULIB_FNMATCH@
+/* Match NAME against the file name pattern PATTERN,
+   returning zero if it matches, FNM_NOMATCH if not.  */
+# if @REPLACE_FNMATCH@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define fnmatch rpl_fnmatch
+#  endif
+_GL_FUNCDECL_RPL (fnmatch, int,
+                  (const char *pattern, const char *name, int flags)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (fnmatch, int,
+                  (const char *pattern, const char *name, int flags));
+# else
+#  if !@HAVE_FNMATCH@
+_GL_FUNCDECL_SYS (fnmatch, int,
+                  (const char *pattern, const char *name, int flags)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (fnmatch, int,
+                  (const char *pattern, const char *name, int flags));
+# endif
+# if !GNULIB_FNMATCH_GNU && __GLIBC__ >= 2
+_GL_CXXALIASWARN (fnmatch);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef fnmatch
+# if HAVE_RAW_DECL_FNMATCH
+_GL_WARN_ON_USE (fnmatch,
+                 "fnmatch does not portably work - "
+                 "use gnulib module fnmatch for portability or gnulib module fnmatch-gnu for a glibc compatible implementation");
+# endif
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_FNMATCH_H */
+#endif /* _@GUARD_PREFIX@_FNMATCH_H */
diff --git a/src/grep/lib/fnmatch_loop.c b/src/grep/lib/fnmatch_loop.c
new file mode 100644
index 0000000..7f938af
--- /dev/null
+++ b/src/grep/lib/fnmatch_loop.c
@@ -0,0 +1,1211 @@
+/* Copyright (C) 1991-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifdef _LIBC
+# include <stdint.h>
+#endif
+
+struct STRUCT
+{
+  const CHAR *pattern;
+  const CHAR *string;
+  bool no_leading_period;
+};
+
+/* Match STRING against the file name pattern PATTERN, returning zero if
+   it matches, nonzero if not.  */
+static int FCT (const CHAR *pattern, const CHAR *string,
+                const CHAR *string_end, bool no_leading_period, int flags,
+                struct STRUCT *ends, size_t alloca_used);
+static int EXT (INT opt, const CHAR *pattern, const CHAR *string,
+                const CHAR *string_end, bool no_leading_period, int flags,
+                size_t alloca_used);
+static const CHAR *END (const CHAR *patternp);
+
+static int
+FCT (const CHAR *pattern, const CHAR *string, const CHAR *string_end,
+     bool no_leading_period, int flags, struct STRUCT *ends, size_t alloca_used)
+{
+  const CHAR *p = pattern, *n = string;
+  UCHAR c;
+#ifdef _LIBC
+# if WIDE_CHAR_VERSION
+  const char *collseq = (const char *)
+    _NL_CURRENT(LC_COLLATE, _NL_COLLATE_COLLSEQWC);
+# else
+  const UCHAR *collseq = (const UCHAR *)
+    _NL_CURRENT(LC_COLLATE, _NL_COLLATE_COLLSEQMB);
+# endif
+#endif
+
+  while ((c = *p++) != L_('\0'))
+    {
+      bool new_no_leading_period = false;
+      c = FOLD (c);
+
+      switch (c)
+        {
+        case L_('?'):
+          if (__glibc_unlikely (flags & FNM_EXTMATCH) && *p == '(')
+            {
+              int res = EXT (c, p, n, string_end, no_leading_period,
+                             flags, alloca_used);
+              if (res != -1)
+                return res;
+            }
+
+          if (n == string_end)
+            return FNM_NOMATCH;
+          else if (*n == L_('/') && (flags & FNM_FILE_NAME))
+            return FNM_NOMATCH;
+          else if (*n == L_('.') && no_leading_period)
+            return FNM_NOMATCH;
+          break;
+
+        case L_('\\'):
+          if (!(flags & FNM_NOESCAPE))
+            {
+              c = *p++;
+              if (c == L_('\0'))
+                /* Trailing \ loses.  */
+                return FNM_NOMATCH;
+              c = FOLD (c);
+            }
+          if (n == string_end || FOLD ((UCHAR) *n) != c)
+            return FNM_NOMATCH;
+          break;
+
+        case L_('*'):
+          if (__glibc_unlikely (flags & FNM_EXTMATCH) && *p == '(')
+            {
+              int res = EXT (c, p, n, string_end, no_leading_period,
+                             flags, alloca_used);
+              if (res != -1)
+                return res;
+            }
+          else if (ends != NULL)
+            {
+              ends->pattern = p - 1;
+              ends->string = n;
+              ends->no_leading_period = no_leading_period;
+              return 0;
+            }
+
+          if (n != string_end && *n == L_('.') && no_leading_period)
+            return FNM_NOMATCH;
+
+          for (c = *p++; c == L_('?') || c == L_('*'); c = *p++)
+            {
+              if (*p == L_('(') && (flags & FNM_EXTMATCH) != 0)
+                {
+                  const CHAR *endp = END (p);
+                  if (endp != p)
+                    {
+                      /* This is a pattern.  Skip over it.  */
+                      p = endp;
+                      continue;
+                    }
+                }
+
+              if (c == L_('?'))
+                {
+                  /* A ? needs to match one character.  */
+                  if (n == string_end)
+                    /* There isn't another character; no match.  */
+                    return FNM_NOMATCH;
+                  else if (*n == L_('/')
+                           && __glibc_unlikely (flags & FNM_FILE_NAME))
+                    /* A slash does not match a wildcard under
+                       FNM_FILE_NAME.  */
+                    return FNM_NOMATCH;
+                  else
+                    /* One character of the string is consumed in matching
+                       this ? wildcard, so *??? won't match if there are
+                       less than three characters.  */
+                    ++n;
+                }
+            }
+
+          if (c == L_('\0'))
+            /* The wildcard(s) is/are the last element of the pattern.
+               If the name is a file name and contains another slash
+               this means it cannot match, unless the FNM_LEADING_DIR
+               flag is set.  */
+            {
+              int result = (flags & FNM_FILE_NAME) == 0 ? 0 : FNM_NOMATCH;
+
+              if (flags & FNM_FILE_NAME)
+                {
+                  if (flags & FNM_LEADING_DIR)
+                    result = 0;
+                  else
+                    {
+                      if (MEMCHR (n, L_('/'), string_end - n) == NULL)
+                        result = 0;
+                    }
+                }
+
+              return result;
+            }
+          else
+            {
+              const CHAR *endp;
+              struct STRUCT end;
+
+              end.pattern = NULL;
+              endp = MEMCHR (n, (flags & FNM_FILE_NAME) ? L_('/') : L_('\0'),
+                             string_end - n);
+              if (endp == NULL)
+                endp = string_end;
+
+              if (c == L_('[')
+                  || (__glibc_unlikely (flags & FNM_EXTMATCH)
+                      && (c == L_('@') || c == L_('+') || c == L_('!'))
+                      && *p == L_('(')))
+                {
+                  int flags2 = ((flags & FNM_FILE_NAME)
+                                ? flags : (flags & ~FNM_PERIOD));
+
+                  for (--p; n < endp; ++n, no_leading_period = false)
+                    if (FCT (p, n, string_end, no_leading_period, flags2,
+                             &end, alloca_used) == 0)
+                      goto found;
+                }
+              else if (c == L_('/') && (flags & FNM_FILE_NAME))
+                {
+                  while (n < string_end && *n != L_('/'))
+                    ++n;
+                  if (n < string_end && *n == L_('/')
+                      && (FCT (p, n + 1, string_end, flags & FNM_PERIOD, flags,
+                               NULL, alloca_used) == 0))
+                    return 0;
+                }
+              else
+                {
+                  int flags2 = ((flags & FNM_FILE_NAME)
+                                ? flags : (flags & ~FNM_PERIOD));
+
+                  if (c == L_('\\') && !(flags & FNM_NOESCAPE))
+                    c = *p;
+                  c = FOLD (c);
+                  for (--p; n < endp; ++n, no_leading_period = false)
+                    if (FOLD ((UCHAR) *n) == c
+                        && (FCT (p, n, string_end, no_leading_period, flags2,
+                                 &end, alloca_used) == 0))
+                      {
+                      found:
+                        if (end.pattern == NULL)
+                          return 0;
+                        break;
+                      }
+                  if (end.pattern != NULL)
+                    {
+                      p = end.pattern;
+                      n = end.string;
+                      no_leading_period = end.no_leading_period;
+                      continue;
+                    }
+                }
+            }
+
+          /* If we come here no match is possible with the wildcard.  */
+          return FNM_NOMATCH;
+
+        case L_('['):
+          {
+            /* Nonzero if the sense of the character class is inverted.  */
+            const CHAR *p_init = p;
+            const CHAR *n_init = n;
+            bool not;
+            CHAR cold;
+            UCHAR fn;
+
+            if (posixly_correct == 0)
+              posixly_correct = getenv ("POSIXLY_CORRECT") != NULL ? 1 : -1;
+
+            if (n == string_end)
+              return FNM_NOMATCH;
+
+            if (*n == L_('.') && no_leading_period)
+              return FNM_NOMATCH;
+
+            if (*n == L_('/') && (flags & FNM_FILE_NAME))
+              /* '/' cannot be matched.  */
+              return FNM_NOMATCH;
+
+            not = (*p == L_('!') || (posixly_correct < 0 && *p == L_('^')));
+            if (not)
+              ++p;
+
+            fn = FOLD ((UCHAR) *n);
+
+            c = *p++;
+            for (;;)
+              {
+                if (!(flags & FNM_NOESCAPE) && c == L_('\\'))
+                  {
+                    if (*p == L_('\0'))
+                      return FNM_NOMATCH;
+                    c = FOLD ((UCHAR) *p);
+                    ++p;
+
+                    goto normal_bracket;
+                  }
+                else if (c == L_('[') && *p == L_(':'))
+                  {
+                    /* Leave room for the null.  */
+                    CHAR str[CHAR_CLASS_MAX_LENGTH + 1];
+                    size_t c1 = 0;
+                    wctype_t wt;
+                    const CHAR *startp = p;
+
+                    for (;;)
+                      {
+                        if (c1 == CHAR_CLASS_MAX_LENGTH)
+                          /* The name is too long and therefore the pattern
+                             is ill-formed.  */
+                          return FNM_NOMATCH;
+
+                        c = *++p;
+                        if (c == L_(':') && p[1] == L_(']'))
+                          {
+                            p += 2;
+                            break;
+                          }
+                        if (c < L_('a') || c >= L_('z'))
+                          {
+                            /* This cannot possibly be a character class name.
+                               Match it as a normal range.  */
+                            p = startp;
+                            c = L_('[');
+                            goto normal_bracket;
+                          }
+                        str[c1++] = c;
+                      }
+                    str[c1] = L_('\0');
+
+                    wt = IS_CHAR_CLASS (str);
+                    if (wt == 0)
+                      /* Invalid character class name.  */
+                      return FNM_NOMATCH;
+
+#if defined _LIBC && ! WIDE_CHAR_VERSION
+                    /* The following code is glibc specific but does
+                       there a good job in speeding up the code since
+                       we can avoid the btowc() call.  */
+                    if (_ISCTYPE ((UCHAR) *n, wt))
+                      goto matched;
+#else
+                    if (iswctype (BTOWC ((UCHAR) *n), wt))
+                      goto matched;
+#endif
+                    c = *p++;
+                  }
+#ifdef _LIBC
+                else if (c == L_('[') && *p == L_('='))
+                  {
+                    /* It's important that STR be a scalar variable rather
+                       than a one-element array, because GCC (at least 4.9.2
+                       -O2 on x86-64) can be confused by the array and
+                       diagnose a "used initialized" in a dead branch in the
+                       findidx function.  */
+                    UCHAR str;
+                    uint32_t nrules =
+                      _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
+                    const CHAR *startp = p;
+
+                    c = *++p;
+                    if (c == L_('\0'))
+                      {
+                        p = startp;
+                        c = L_('[');
+                        goto normal_bracket;
+                      }
+                    str = c;
+
+                    c = *++p;
+                    if (c != L_('=') || p[1] != L_(']'))
+                      {
+                        p = startp;
+                        c = L_('[');
+                        goto normal_bracket;
+                      }
+                    p += 2;
+
+                    if (nrules == 0)
+                      {
+                        if ((UCHAR) *n == str)
+                          goto matched;
+                      }
+                    else
+                      {
+                        const int32_t *table;
+# if WIDE_CHAR_VERSION
+                        const int32_t *weights;
+                        const wint_t *extra;
+# else
+                        const unsigned char *weights;
+                        const unsigned char *extra;
+# endif
+                        const int32_t *indirect;
+                        int32_t idx;
+                        const UCHAR *cp = (const UCHAR *) &str;
+
+# if WIDE_CHAR_VERSION
+                        table = (const int32_t *)
+                          _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEWC);
+                        weights = (const int32_t *)
+                          _NL_CURRENT (LC_COLLATE, _NL_COLLATE_WEIGHTWC);
+                        extra = (const wint_t *)
+                          _NL_CURRENT (LC_COLLATE, _NL_COLLATE_EXTRAWC);
+                        indirect = (const int32_t *)
+                          _NL_CURRENT (LC_COLLATE, _NL_COLLATE_INDIRECTWC);
+# else
+                        table = (const int32_t *)
+                          _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEMB);
+                        weights = (const unsigned char *)
+                          _NL_CURRENT (LC_COLLATE, _NL_COLLATE_WEIGHTMB);
+                        extra = (const unsigned char *)
+                          _NL_CURRENT (LC_COLLATE, _NL_COLLATE_EXTRAMB);
+                        indirect = (const int32_t *)
+                          _NL_CURRENT (LC_COLLATE, _NL_COLLATE_INDIRECTMB);
+# endif
+
+                        idx = FINDIDX (table, indirect, extra, &cp, 1);
+                        if (idx != 0)
+                          {
+                            /* We found a table entry.  Now see whether the
+                               character we are currently at has the same
+                               equivalence class value.  */
+                            int len = weights[idx & 0xffffff];
+                            int32_t idx2;
+                            const UCHAR *np = (const UCHAR *) n;
+
+                            idx2 = FINDIDX (table, indirect, extra,
+                                            &np, string_end - n);
+                            if (idx2 != 0
+                                && (idx >> 24) == (idx2 >> 24)
+                                && len == weights[idx2 & 0xffffff])
+                              {
+                                int cnt = 0;
+
+                                idx &= 0xffffff;
+                                idx2 &= 0xffffff;
+
+                                while (cnt < len
+                                       && (weights[idx + 1 + cnt]
+                                           == weights[idx2 + 1 + cnt]))
+                                  ++cnt;
+
+                                if (cnt == len)
+                                  goto matched;
+                              }
+                          }
+                      }
+
+                    c = *p++;
+                  }
+#endif
+                else if (c == L_('\0'))
+                  {
+                    /* [ unterminated, treat as normal character.  */
+                    p = p_init;
+                    n = n_init;
+                    c = L_('[');
+                    goto normal_match;
+                  }
+                else
+                  {
+                    bool is_range = false;
+
+#ifdef _LIBC
+                    bool is_seqval = false;
+
+                    if (c == L_('[') && *p == L_('.'))
+                      {
+                        uint32_t nrules =
+                          _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
+                        const CHAR *startp = p;
+                        size_t c1 = 0;
+
+                        while (1)
+                          {
+                            c = *++p;
+                            if (c == L_('.') && p[1] == L_(']'))
+                              {
+                                p += 2;
+                                break;
+                              }
+                            if (c == '\0')
+                              return FNM_NOMATCH;
+                            ++c1;
+                          }
+
+                        /* We have to handling the symbols differently in
+                           ranges since then the collation sequence is
+                           important.  */
+                        is_range = *p == L_('-') && p[1] != L_('\0');
+
+                        if (nrules == 0)
+                          {
+                            /* There are no names defined in the collation
+                               data.  Therefore we only accept the trivial
+                               names consisting of the character itself.  */
+                            if (c1 != 1)
+                              return FNM_NOMATCH;
+
+                            if (!is_range && *n == startp[1])
+                              goto matched;
+
+                            cold = startp[1];
+                            c = *p++;
+                          }
+                        else
+                          {
+                            int32_t table_size;
+                            const int32_t *symb_table;
+                            const unsigned char *extra;
+                            int32_t idx;
+                            int32_t elem;
+# if WIDE_CHAR_VERSION
+                            CHAR *wextra;
+# endif
+
+                            table_size =
+                              _NL_CURRENT_WORD (LC_COLLATE,
+                                                _NL_COLLATE_SYMB_HASH_SIZEMB);
+                            symb_table = (const int32_t *)
+                              _NL_CURRENT (LC_COLLATE,
+                                           _NL_COLLATE_SYMB_TABLEMB);
+                            extra = (const unsigned char *)
+                              _NL_CURRENT (LC_COLLATE,
+                                           _NL_COLLATE_SYMB_EXTRAMB);
+
+                            for (elem = 0; elem < table_size; elem++)
+                              if (symb_table[2 * elem] != 0)
+                                {
+                                  idx = symb_table[2 * elem + 1];
+                                  /* Skip the name of collating element.  */
+                                  idx += 1 + extra[idx];
+# if WIDE_CHAR_VERSION
+                                  /* Skip the byte sequence of the
+                                     collating element.  */
+                                  idx += 1 + extra[idx];
+                                  /* Adjust for the alignment.  */
+                                  idx = (idx + 3) & ~3;
+
+                                  wextra = (CHAR *) &extra[idx + 4];
+
+                                  if (/* Compare the length of the sequence.  */
+                                      c1 == wextra[0]
+                                      /* Compare the wide char sequence.  */
+                                      && (__wmemcmp (startp + 1, &wextra[1],
+                                                     c1)
+                                          == 0))
+                                    /* Yep, this is the entry.  */
+                                    break;
+# else
+                                  if (/* Compare the length of the sequence.  */
+                                      c1 == extra[idx]
+                                      /* Compare the byte sequence.  */
+                                      && memcmp (startp + 1,
+                                                 &extra[idx + 1], c1) == 0)
+                                    /* Yep, this is the entry.  */
+                                    break;
+# endif
+                                }
+
+                            if (elem < table_size)
+                              {
+                                /* Compare the byte sequence but only if
+                                   this is not part of a range.  */
+                                if (! is_range
+
+# if WIDE_CHAR_VERSION
+                                    && __wmemcmp (n, &wextra[1], c1) == 0
+# else
+                                    && memcmp (n, &extra[idx + 1], c1) == 0
+# endif
+                                    )
+                                  {
+                                    n += c1 - 1;
+                                    goto matched;
+                                  }
+
+                                /* Get the collation sequence value.  */
+                                is_seqval = true;
+# if WIDE_CHAR_VERSION
+                                cold = wextra[1 + wextra[0]];
+# else
+                                idx += 1 + extra[idx];
+                                /* Adjust for the alignment.  */
+                                idx = (idx + 3) & ~3;
+                                cold = *((int32_t *) &extra[idx]);
+# endif
+
+                                c = *p++;
+                              }
+                            else if (c1 == 1)
+                              {
+                                /* No valid character.  Match it as a
+                                   single byte.  */
+                                if (!is_range && *n == startp[1])
+                                  goto matched;
+
+                                cold = startp[1];
+                                c = *p++;
+                              }
+                            else
+                              return FNM_NOMATCH;
+                          }
+                      }
+                    else
+#endif
+                      {
+                        c = FOLD (c);
+                      normal_bracket:
+
+                        /* We have to handling the symbols differently in
+                           ranges since then the collation sequence is
+                           important.  */
+                        is_range = (*p == L_('-') && p[1] != L_('\0')
+                                    && p[1] != L_(']'));
+
+                        if (!is_range && c == fn)
+                          goto matched;
+
+#if _LIBC
+                        /* This is needed if we goto normal_bracket; from
+                           outside of is_seqval's scope.  */
+                        is_seqval = false;
+#endif
+                        cold = c;
+                        c = *p++;
+                      }
+
+                    if (c == L_('-') && *p != L_(']'))
+                      {
+#if _LIBC
+                        /* We have to find the collation sequence
+                           value for C.  Collation sequence is nothing
+                           we can regularly access.  The sequence
+                           value is defined by the order in which the
+                           definitions of the collation values for the
+                           various characters appear in the source
+                           file.  A strange concept, nowhere
+                           documented.  */
+                        uint32_t fcollseq;
+                        uint32_t lcollseq;
+                        UCHAR cend = *p++;
+
+# if WIDE_CHAR_VERSION
+                        /* Search in the 'names' array for the characters.  */
+                        fcollseq = __collseq_table_lookup (collseq, fn);
+                        if (fcollseq == ~((uint32_t) 0))
+                          /* XXX We don't know anything about the character
+                             we are supposed to match.  This means we are
+                             failing.  */
+                          goto range_not_matched;
+
+                        if (is_seqval)
+                          lcollseq = cold;
+                        else
+                          lcollseq = __collseq_table_lookup (collseq, cold);
+# else
+                        fcollseq = collseq[fn];
+                        lcollseq = is_seqval ? cold : collseq[(UCHAR) cold];
+# endif
+
+                        is_seqval = false;
+                        if (cend == L_('[') && *p == L_('.'))
+                          {
+                            uint32_t nrules =
+                              _NL_CURRENT_WORD (LC_COLLATE,
+                                                _NL_COLLATE_NRULES);
+                            const CHAR *startp = p;
+                            size_t c1 = 0;
+
+                            while (1)
+                              {
+                                c = *++p;
+                                if (c == L_('.') && p[1] == L_(']'))
+                                  {
+                                    p += 2;
+                                    break;
+                                  }
+                                if (c == '\0')
+                                  return FNM_NOMATCH;
+                                ++c1;
+                              }
+
+                            if (nrules == 0)
+                              {
+                                /* There are no names defined in the
+                                   collation data.  Therefore we only
+                                   accept the trivial names consisting
+                                   of the character itself.  */
+                                if (c1 != 1)
+                                  return FNM_NOMATCH;
+
+                                cend = startp[1];
+                              }
+                            else
+                              {
+                                int32_t table_size;
+                                const int32_t *symb_table;
+                                const unsigned char *extra;
+                                int32_t idx;
+                                int32_t elem;
+# if WIDE_CHAR_VERSION
+                                CHAR *wextra;
+# endif
+
+                                table_size =
+                                  _NL_CURRENT_WORD (LC_COLLATE,
+                                                    _NL_COLLATE_SYMB_HASH_SIZEMB);
+                                symb_table = (const int32_t *)
+                                  _NL_CURRENT (LC_COLLATE,
+                                               _NL_COLLATE_SYMB_TABLEMB);
+                                extra = (const unsigned char *)
+                                  _NL_CURRENT (LC_COLLATE,
+                                               _NL_COLLATE_SYMB_EXTRAMB);
+
+                                for (elem = 0; elem < table_size; elem++)
+                                  if (symb_table[2 * elem] != 0)
+                                    {
+                                      idx = symb_table[2 * elem + 1];
+                                      /* Skip the name of collating
+                                         element.  */
+                                      idx += 1 + extra[idx];
+# if WIDE_CHAR_VERSION
+                                      /* Skip the byte sequence of the
+                                         collating element.  */
+                                      idx += 1 + extra[idx];
+                                      /* Adjust for the alignment.  */
+                                      idx = (idx + 3) & ~3;
+
+                                      wextra = (CHAR *) &extra[idx + 4];
+
+                                      if (/* Compare the length of the
+                                             sequence.  */
+                                          c1 == wextra[0]
+                                          /* Compare the wide char sequence.  */
+                                          && (__wmemcmp (startp + 1,
+                                                         &wextra[1], c1)
+                                              == 0))
+                                        /* Yep, this is the entry.  */
+                                        break;
+# else
+                                      if (/* Compare the length of the
+                                             sequence.  */
+                                          c1 == extra[idx]
+                                          /* Compare the byte sequence.  */
+                                          && memcmp (startp + 1,
+                                                     &extra[idx + 1], c1) == 0)
+                                        /* Yep, this is the entry.  */
+                                        break;
+# endif
+                                    }
+
+                                if (elem < table_size)
+                                  {
+                                    /* Get the collation sequence value.  */
+                                    is_seqval = true;
+# if WIDE_CHAR_VERSION
+                                    cend = wextra[1 + wextra[0]];
+# else
+                                    idx += 1 + extra[idx];
+                                    /* Adjust for the alignment.  */
+                                    idx = (idx + 3) & ~3;
+                                    cend = *((int32_t *) &extra[idx]);
+# endif
+                                  }
+                                else if (c1 == 1)
+                                  {
+                                    cend = startp[1];
+                                    c = *p++;
+                                  }
+                                else
+                                  return FNM_NOMATCH;
+                              }
+                          }
+                        else
+                          {
+                            if (!(flags & FNM_NOESCAPE) && cend == L_('\\'))
+                              cend = *p++;
+                            if (cend == L_('\0'))
+                              return FNM_NOMATCH;
+                            cend = FOLD (cend);
+                          }
+
+                        /* XXX It is not entirely clear to me how to handle
+                           characters which are not mentioned in the
+                           collation specification.  */
+                        if (
+# if WIDE_CHAR_VERSION
+                            lcollseq == 0xffffffff ||
+# endif
+                            lcollseq <= fcollseq)
+                          {
+                            /* We have to look at the upper bound.  */
+                            uint32_t hcollseq;
+
+                            if (is_seqval)
+                              hcollseq = cend;
+                            else
+                              {
+# if WIDE_CHAR_VERSION
+                                hcollseq =
+                                  __collseq_table_lookup (collseq, cend);
+                                if (hcollseq == ~((uint32_t) 0))
+                                  {
+                                    /* Hum, no information about the upper
+                                       bound.  The matching succeeds if the
+                                       lower bound is matched exactly.  */
+                                    if (lcollseq != fcollseq)
+                                      goto range_not_matched;
+
+                                    goto matched;
+                                  }
+# else
+                                hcollseq = collseq[cend];
+# endif
+                              }
+
+                            if (lcollseq <= hcollseq && fcollseq <= hcollseq)
+                              goto matched;
+                          }
+# if WIDE_CHAR_VERSION
+                      range_not_matched:
+# endif
+#else
+                        /* We use a boring value comparison of the character
+                           values.  This is better than comparing using
+                           'strcoll' since the latter would have surprising
+                           and sometimes fatal consequences.  */
+                        UCHAR cend = *p++;
+
+                        if (!(flags & FNM_NOESCAPE) && cend == L_('\\'))
+                          cend = *p++;
+                        if (cend == L_('\0'))
+                          return FNM_NOMATCH;
+
+                        /* It is a range.  */
+                        if ((UCHAR) cold <= fn && fn <= cend)
+                          goto matched;
+#endif
+
+                        c = *p++;
+                      }
+                  }
+
+                if (c == L_(']'))
+                  break;
+              }
+
+            if (!not)
+              return FNM_NOMATCH;
+            break;
+
+          matched:
+            /* Skip the rest of the [...] that already matched.  */
+            while ((c = *p++) != L_(']'))
+              {
+                if (c == L_('\0'))
+                  /* [... (unterminated) loses.  */
+                  return FNM_NOMATCH;
+
+                if (!(flags & FNM_NOESCAPE) && c == L_('\\'))
+                  {
+                    if (*p == L_('\0'))
+                      return FNM_NOMATCH;
+                    /* XXX 1003.2d11 is unclear if this is right.  */
+                    ++p;
+                  }
+                else if (c == L_('[') && *p == L_(':'))
+                  {
+                    int c1 = 0;
+                    const CHAR *startp = p;
+
+                    while (1)
+                      {
+                        c = *++p;
+                        if (++c1 == CHAR_CLASS_MAX_LENGTH)
+                          return FNM_NOMATCH;
+
+                        if (*p == L_(':') && p[1] == L_(']'))
+                          break;
+
+                        if (c < L_('a') || c >= L_('z'))
+                          {
+                            p = startp - 2;
+                            break;
+                          }
+                      }
+                    p += 2;
+                  }
+                else if (c == L_('[') && *p == L_('='))
+                  {
+                    c = *++p;
+                    if (c == L_('\0'))
+                      return FNM_NOMATCH;
+                    c = *++p;
+                    if (c != L_('=') || p[1] != L_(']'))
+                      return FNM_NOMATCH;
+                    p += 2;
+                  }
+                else if (c == L_('[') && *p == L_('.'))
+                  {
+                    while (1)
+                      {
+                        c = *++p;
+                        if (c == L_('\0'))
+                          return FNM_NOMATCH;
+
+                        if (c == L_('.') && p[1] == L_(']'))
+                          break;
+                      }
+                    p += 2;
+                  }
+              }
+            if (not)
+              return FNM_NOMATCH;
+          }
+          break;
+
+        case L_('+'):
+        case L_('@'):
+        case L_('!'):
+          if (__glibc_unlikely (flags & FNM_EXTMATCH) && *p == '(')
+            {
+              int res = EXT (c, p, n, string_end, no_leading_period, flags,
+                             alloca_used);
+              if (res != -1)
+                return res;
+            }
+          goto normal_match;
+
+        case L_('/'):
+          if (NO_LEADING_PERIOD (flags))
+            {
+              if (n == string_end || c != (UCHAR) *n)
+                return FNM_NOMATCH;
+
+              new_no_leading_period = true;
+              break;
+            }
+          FALLTHROUGH;
+        default:
+        normal_match:
+          if (n == string_end || c != FOLD ((UCHAR) *n))
+            return FNM_NOMATCH;
+        }
+
+      no_leading_period = new_no_leading_period;
+      ++n;
+    }
+
+  if (n == string_end)
+    return 0;
+
+  if ((flags & FNM_LEADING_DIR) && n != string_end && *n == L_('/'))
+    /* The FNM_LEADING_DIR flag says that "foo*" matches "foobar/frobozz".  */
+    return 0;
+
+  return FNM_NOMATCH;
+}
+
+
+static const CHAR *
+END (const CHAR *pattern)
+{
+  const CHAR *p = pattern;
+
+  while (1)
+    if (*++p == L_('\0'))
+      /* This is an invalid pattern.  */
+      return pattern;
+    else if (*p == L_('['))
+      {
+        /* Handle brackets special.  */
+        if (posixly_correct == 0)
+          posixly_correct = getenv ("POSIXLY_CORRECT") != NULL ? 1 : -1;
+
+        /* Skip the not sign.  We have to recognize it because of a possibly
+           following ']'.  */
+        if (*++p == L_('!') || (posixly_correct < 0 && *p == L_('^')))
+          ++p;
+        /* A leading ']' is recognized as such.  */
+        if (*p == L_(']'))
+          ++p;
+        /* Skip over all characters of the list.  */
+        while (*p != L_(']'))
+          if (*p++ == L_('\0'))
+            /* This is no valid pattern.  */
+            return pattern;
+      }
+    else if ((*p == L_('?') || *p == L_('*') || *p == L_('+') || *p == L_('@')
+              || *p == L_('!')) && p[1] == L_('('))
+      {
+        p = END (p + 1);
+        if (*p == L_('\0'))
+          /* This is an invalid pattern.  */
+          return pattern;
+      }
+    else if (*p == L_(')'))
+      break;
+
+  return p + 1;
+}
+
+
+static int
+EXT (INT opt, const CHAR *pattern, const CHAR *string, const CHAR *string_end,
+     bool no_leading_period, int flags, size_t alloca_used)
+{
+  const CHAR *startp;
+  ptrdiff_t level;
+  struct patternlist
+  {
+    struct patternlist *next;
+    CHAR malloced;
+    CHAR str __flexarr;
+  } *list = NULL;
+  struct patternlist **lastp = &list;
+  size_t pattern_len = STRLEN (pattern);
+  bool any_malloced = false;
+  const CHAR *p;
+  const CHAR *rs;
+  int retval = 0;
+
+  /* Parse the pattern.  Store the individual parts in the list.  */
+  level = 0;
+  for (startp = p = pattern + 1; level >= 0; ++p)
+    if (*p == L_('\0'))
+      {
+        /* This is an invalid pattern.  */
+        retval = -1;
+        goto out;
+      }
+    else if (*p == L_('['))
+      {
+        /* Handle brackets special.  */
+        if (posixly_correct == 0)
+          posixly_correct = getenv ("POSIXLY_CORRECT") != NULL ? 1 : -1;
+
+        /* Skip the not sign.  We have to recognize it because of a possibly
+           following ']'.  */
+        if (*++p == L_('!') || (posixly_correct < 0 && *p == L_('^')))
+          ++p;
+        /* A leading ']' is recognized as such.  */
+        if (*p == L_(']'))
+          ++p;
+        /* Skip over all characters of the list.  */
+        while (*p != L_(']'))
+          if (*p++ == L_('\0'))
+            {
+              /* This is no valid pattern.  */
+              retval = -1;
+              goto out;
+            }
+      }
+    else if ((*p == L_('?') || *p == L_('*') || *p == L_('+') || *p == L_('@')
+              || *p == L_('!')) && p[1] == L_('('))
+      /* Remember the nesting level.  */
+      ++level;
+    else if (*p == L_(')'))
+      {
+        if (level-- == 0)
+          {
+            /* This means we found the end of the pattern.  */
+#define NEW_PATTERN \
+            struct patternlist *newp;                                         \
+            size_t plen = (opt == L_('?') || opt == L_('@')                   \
+                           ? pattern_len : (p - startp + 1UL));               \
+            idx_t slen = FLEXSIZEOF (struct patternlist, str, 0);             \
+            idx_t new_used = alloca_used + slen;                              \
+            idx_t plensize;                                                   \
+            if (INT_MULTIPLY_WRAPV (plen, sizeof (CHAR), &plensize)           \
+                || INT_ADD_WRAPV (new_used, plensize, &new_used))             \
+              {                                                               \
+                retval = -2;                                                  \
+                goto out;                                                     \
+              }                                                               \
+            slen += plensize;                                                 \
+            bool malloced = ! __libc_use_alloca (new_used);                   \
+            if (__glibc_unlikely (malloced))                                  \
+              {                                                               \
+                newp = malloc (slen);                                         \
+                if (newp == NULL)                                             \
+                  {                                                           \
+                    retval = -2;                                              \
+                    goto out;                                                 \
+                  }                                                           \
+                any_malloced = true;                                          \
+              }                                                               \
+            else                                                              \
+              newp = alloca_account (slen, alloca_used);                      \
+            newp->next = NULL;                                                \
+            newp->malloced = malloced;                                        \
+            *((CHAR *) MEMPCPY (newp->str, startp, p - startp)) = L_('\0');   \
+            *lastp = newp;                                                    \
+            lastp = &newp->next
+            NEW_PATTERN;
+          }
+      }
+    else if (*p == L_('|'))
+      {
+        if (level == 0)
+          {
+            NEW_PATTERN;
+            startp = p + 1;
+          }
+      }
+  assert (list != NULL);
+  assert (p[-1] == L_(')'));
+#undef NEW_PATTERN
+
+  switch (opt)
+    {
+    case L_('*'):
+      if (FCT (p, string, string_end, no_leading_period, flags, NULL,
+               alloca_used) == 0)
+        goto success;
+      FALLTHROUGH;
+    case L_('+'):
+      do
+        {
+          for (rs = string; rs <= string_end; ++rs)
+            /* First match the prefix with the current pattern with the
+               current pattern.  */
+            if (FCT (list->str, string, rs, no_leading_period,
+                     flags & FNM_FILE_NAME ? flags : flags & ~FNM_PERIOD,
+                     NULL, alloca_used) == 0
+                /* This was successful.  Now match the rest with the rest
+                   of the pattern.  */
+                && (FCT (p, rs, string_end,
+                         rs == string
+                         ? no_leading_period
+                         : rs[-1] == '/' && NO_LEADING_PERIOD (flags),
+                         flags & FNM_FILE_NAME
+                         ? flags : flags & ~FNM_PERIOD, NULL, alloca_used) == 0
+                    /* This didn't work.  Try the whole pattern.  */
+                    || (rs != string
+                        && FCT (pattern - 1, rs, string_end,
+                                rs == string
+                                ? no_leading_period
+                                : rs[-1] == '/' && NO_LEADING_PERIOD (flags),
+                                flags & FNM_FILE_NAME
+                                ? flags : flags & ~FNM_PERIOD, NULL,
+                                alloca_used) == 0)))
+              /* It worked.  Signal success.  */
+              goto success;
+        }
+      while ((list = list->next) != NULL);
+
+      /* None of the patterns lead to a match.  */
+      retval = FNM_NOMATCH;
+      break;
+
+    case L_('?'):
+      if (FCT (p, string, string_end, no_leading_period, flags, NULL,
+               alloca_used) == 0)
+        goto success;
+      FALLTHROUGH;
+    case L_('@'):
+      do
+        /* I cannot believe it but 'strcat' is actually acceptable
+           here.  Match the entire string with the prefix from the
+           pattern list and the rest of the pattern following the
+           pattern list.  */
+        if (FCT (STRCAT (list->str, p), string, string_end,
+                 no_leading_period,
+                 flags & FNM_FILE_NAME ? flags : flags & ~FNM_PERIOD,
+                 NULL, alloca_used) == 0)
+          /* It worked.  Signal success.  */
+          goto success;
+      while ((list = list->next) != NULL);
+
+      /* None of the patterns lead to a match.  */
+      retval = FNM_NOMATCH;
+      break;
+
+    case L_('!'):
+      for (rs = string; rs <= string_end; ++rs)
+        {
+          struct patternlist *runp;
+
+          for (runp = list; runp != NULL; runp = runp->next)
+            if (FCT (runp->str, string, rs,  no_leading_period,
+                     flags & FNM_FILE_NAME ? flags : flags & ~FNM_PERIOD,
+                     NULL, alloca_used) == 0)
+              break;
+
+          /* If none of the patterns matched see whether the rest does.  */
+          if (runp == NULL
+              && (FCT (p, rs, string_end,
+                       rs == string
+                       ? no_leading_period
+                       : rs[-1] == '/' && NO_LEADING_PERIOD (flags),
+                       flags & FNM_FILE_NAME ? flags : flags & ~FNM_PERIOD,
+                       NULL, alloca_used) == 0))
+            /* This is successful.  */
+            goto success;
+        }
+
+      /* None of the patterns together with the rest of the pattern
+         lead to a match.  */
+      retval = FNM_NOMATCH;
+      break;
+
+    default:
+      assert (! "Invalid extended matching operator");
+      retval = -1;
+      break;
+    }
+
+ success:
+ out:
+  if (any_malloced)
+    while (list != NULL)
+      {
+        struct patternlist *old = list;
+        list = list->next;
+        if (old->malloced)
+          free (old);
+      }
+
+  return retval;
+}
+
+
+#undef FOLD
+#undef CHAR
+#undef UCHAR
+#undef INT
+#undef FCT
+#undef EXT
+#undef END
+#undef STRUCT
+#undef MEMPCPY
+#undef MEMCHR
+#undef STRLEN
+#undef STRCAT
+#undef L_
+#undef BTOWC
+#undef WIDE_CHAR_VERSION
+#undef FINDIDX
diff --git a/src/grep/lib/fopen.c b/src/grep/lib/fopen.c
new file mode 100644
index 0000000..cebcdac
--- /dev/null
+++ b/src/grep/lib/fopen.c
@@ -0,0 +1,230 @@
+/* Open a stream to a file.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+/* If the user's config.h happens to include <stdio.h>, let it include only
+   the system's <stdio.h> here, so that orig_fopen doesn't recurse to
+   rpl_fopen.  */
+#define _GL_ALREADY_INCLUDING_STDIO_H
+#include <config.h>
+
+/* Get the original definition of fopen.  It might be defined as a macro.  */
+#include <stdio.h>
+#undef _GL_ALREADY_INCLUDING_STDIO_H
+
+static FILE *
+orig_fopen (const char *filename, const char *mode)
+{
+  return fopen (filename, mode);
+}
+
+/* Specification.  */
+/* Write "stdio.h" here, not <stdio.h>, otherwise OSF/1 5.1 DTK cc eliminates
+   this include because of the preliminary #include <stdio.h> above.  */
+#include "stdio.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+FILE *
+rpl_fopen (const char *filename, const char *mode)
+{
+  int open_direction;
+  int open_flags;
+#if GNULIB_FOPEN_GNU
+  bool open_flags_gnu;
+# define BUF_SIZE 80
+  char fdopen_mode_buf[BUF_SIZE + 1];
+#endif
+
+#if defined _WIN32 && ! defined __CYGWIN__
+  if (strcmp (filename, "/dev/null") == 0)
+    filename = "NUL";
+#endif
+
+  /* Parse the mode.  */
+  open_direction = 0;
+  open_flags = 0;
+#if GNULIB_FOPEN_GNU
+  open_flags_gnu = false;
+#endif
+  {
+    const char *p = mode;
+#if GNULIB_FOPEN_GNU
+    char *q = fdopen_mode_buf;
+#endif
+
+    for (; *p != '\0'; p++)
+      {
+        switch (*p)
+          {
+          case 'r':
+            open_direction = O_RDONLY;
+#if GNULIB_FOPEN_GNU
+            if (q < fdopen_mode_buf + BUF_SIZE)
+              *q++ = *p;
+#endif
+            continue;
+          case 'w':
+            open_direction = O_WRONLY;
+            open_flags |= O_CREAT | O_TRUNC;
+#if GNULIB_FOPEN_GNU
+            if (q < fdopen_mode_buf + BUF_SIZE)
+              *q++ = *p;
+#endif
+            continue;
+          case 'a':
+            open_direction = O_WRONLY;
+            open_flags |= O_CREAT | O_APPEND;
+#if GNULIB_FOPEN_GNU
+            if (q < fdopen_mode_buf + BUF_SIZE)
+              *q++ = *p;
+#endif
+            continue;
+          case 'b':
+            /* While it is non-standard, O_BINARY is guaranteed by
+               gnulib <fcntl.h>.  We can also assume that orig_fopen
+               supports the 'b' flag.  */
+            open_flags |= O_BINARY;
+#if GNULIB_FOPEN_GNU
+            if (q < fdopen_mode_buf + BUF_SIZE)
+              *q++ = *p;
+#endif
+            continue;
+          case '+':
+            open_direction = O_RDWR;
+#if GNULIB_FOPEN_GNU
+            if (q < fdopen_mode_buf + BUF_SIZE)
+              *q++ = *p;
+#endif
+            continue;
+#if GNULIB_FOPEN_GNU
+          case 'x':
+            open_flags |= O_EXCL;
+            open_flags_gnu = true;
+            continue;
+          case 'e':
+            open_flags |= O_CLOEXEC;
+            open_flags_gnu = true;
+            continue;
+#endif
+          default:
+            break;
+          }
+#if GNULIB_FOPEN_GNU
+        /* The rest of the mode string can be a platform-dependent extension.
+           Copy it unmodified.  */
+        {
+          size_t len = strlen (p);
+          if (len > fdopen_mode_buf + BUF_SIZE - q)
+            len = fdopen_mode_buf + BUF_SIZE - q;
+          memcpy (q, p, len);
+          q += len;
+        }
+#endif
+        break;
+      }
+#if GNULIB_FOPEN_GNU
+    *q = '\0';
+#endif
+  }
+
+#if FOPEN_TRAILING_SLASH_BUG
+  /* Fail if the mode requires write access and the filename ends in a slash,
+     as POSIX says such a filename must name a directory
+     <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_13>:
+       "A pathname that contains at least one non-<slash> character and that
+        ends with one or more trailing <slash> characters shall not be resolved
+        successfully unless the last pathname component before the trailing
+        <slash> characters names an existing directory"
+     If the named file already exists as a directory, then if a mode that
+     requires write access is specified, fopen() must fail because POSIX
+     <https://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html>
+     says that it fails with errno = EISDIR in this case.
+     If the named file does not exist or does not name a directory, then
+     fopen() must fail since the file does not contain a '.' directory.  */
+  {
+    size_t len = strlen (filename);
+    if (len > 0 && filename[len - 1] == '/')
+      {
+        int fd;
+        struct stat statbuf;
+        FILE *fp;
+
+        if (open_direction != O_RDONLY)
+          {
+            errno = EISDIR;
+            return NULL;
+          }
+
+        fd = open (filename, open_direction | open_flags,
+                   S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
+        if (fd < 0)
+          return NULL;
+
+        if (fstat (fd, &statbuf) >= 0 && !S_ISDIR (statbuf.st_mode))
+          {
+            close (fd);
+            errno = ENOTDIR;
+            return NULL;
+          }
+
+# if GNULIB_FOPEN_GNU
+        fp = fdopen (fd, fdopen_mode_buf);
+# else
+        fp = fdopen (fd, mode);
+# endif
+        if (fp == NULL)
+          {
+            int saved_errno = errno;
+            close (fd);
+            errno = saved_errno;
+          }
+        return fp;
+      }
+  }
+#endif
+
+#if GNULIB_FOPEN_GNU
+  if (open_flags_gnu)
+    {
+      int fd;
+      FILE *fp;
+
+      fd = open (filename, open_direction | open_flags,
+                 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
+      if (fd < 0)
+        return NULL;
+
+      fp = fdopen (fd, fdopen_mode_buf);
+      if (fp == NULL)
+        {
+          int saved_errno = errno;
+          close (fd);
+          errno = saved_errno;
+        }
+      return fp;
+    }
+#endif
+
+  return orig_fopen (filename, mode);
+}
diff --git a/src/grep/lib/fpending.c b/src/grep/lib/fpending.c
new file mode 100644
index 0000000..7c61f7e
--- /dev/null
+++ b/src/grep/lib/fpending.c
@@ -0,0 +1,63 @@
+/* fpending.c -- return the number of pending output bytes on a stream
+   Copyright (C) 2000, 2004, 2006-2007, 2009-2021 Free Software Foundation,
+   Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering. */
+
+#include <config.h>
+
+/* Specification.  */
+#include "fpending.h"
+
+#include "stdio-impl.h"
+
+/* This file is not used on systems that already have the __fpending function,
+   namely glibc >= 2.2, Solaris >= 7, UnixWare >= 7.1.4.MP4, Cygwin >= 1.7.34,
+   Android API >= 23.  */
+
+/* Return the number of pending (aka buffered, unflushed)
+   bytes on the stream, FP, that is open for writing.  */
+size_t
+__fpending (FILE *fp)
+{
+  /* Most systems provide FILE as a struct and the necessary bitmask in
+     <stdio.h>, because they need it for implementing getc() and putc() as
+     fast macros.  */
+#if defined _IO_EOF_SEEN || defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1
+  /* GNU libc, BeOS, Haiku, Linux libc5 */
+  return fp->_IO_write_ptr - fp->_IO_write_base;
+#elif defined __sferror || defined __DragonFly__ || defined __ANDROID__
+  /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin < 1.7.34, Minix 3, Android */
+  return fp->_p - fp->_bf._base;
+#elif defined __EMX__                /* emx+gcc */
+  return fp->_ptr - fp->_buffer;
+#elif defined __minix                /* Minix */
+  return fp_->_ptr - fp_->_buf;
+#elif defined _IOERR                 /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, UnixWare, mingw, MSVC, NonStop Kernel, OpenVMS */
+  return (fp_->_ptr ? fp_->_ptr - fp_->_base : 0);
+#elif defined __UCLIBC__             /* uClibc */
+  return (fp->__modeflags & __FLAG_WRITING ? fp->__bufpos - fp->__bufstart : 0);
+#elif defined __QNX__                /* QNX */
+  return (fp->_Mode & 0x2000 /*_MWRITE*/ ? fp->_Next - fp->_Buf : 0);
+#elif defined __MINT__               /* Atari FreeMiNT */
+  return fp->__bufp - fp->__buffer;
+#elif defined EPLAN9                 /* Plan9 */
+  return fp->wp - fp->buf;
+#else
+# error "Please port gnulib fpending.c to your platform!"
+  return 1;
+#endif
+}
diff --git a/src/grep/lib/fpending.h b/src/grep/lib/fpending.h
new file mode 100644
index 0000000..016341b
--- /dev/null
+++ b/src/grep/lib/fpending.h
@@ -0,0 +1,29 @@
+/* Declare __fpending.
+
+   Copyright (C) 2000, 2003, 2005-2006, 2009-2021 Free Software Foundation,
+   Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+   Written by Jim Meyering.  */
+
+#include <stddef.h>
+#include <stdio.h>
+#if HAVE_STDIO_EXT_H
+# include <stdio_ext.h>
+#endif
+
+#if !HAVE_DECL___FPENDING
+size_t __fpending (FILE *) _GL_ATTRIBUTE_PURE;
+#endif
diff --git a/src/grep/lib/free.c b/src/grep/lib/free.c
new file mode 100644
index 0000000..780f03d
--- /dev/null
+++ b/src/grep/lib/free.c
@@ -0,0 +1,53 @@
+/* Make free() preserve errno.
+
+   Copyright (C) 2003, 2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Paul Eggert */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+/* A function definition is only needed if HAVE_FREE_POSIX is not defined.  */
+#if !HAVE_FREE_POSIX
+
+# include <errno.h>
+
+void
+rpl_free (void *p)
+# undef free
+{
+# if defined __GNUC__ && !defined __clang__
+  /* An invalid GCC optimization
+     <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98396>
+     would optimize away the assignments in the code below, when link-time
+     optimization (LTO) is enabled.  Make the code more complicated, so that
+     GCC does not grok how to optimize it.  */
+  int err[2];
+  err[0] = errno;
+  err[1] = errno;
+  errno = 0;
+  free (p);
+  errno = err[errno == 0];
+# else
+  int err = errno;
+  free (p);
+  errno = err;
+# endif
+}
+
+#endif
diff --git a/src/grep/lib/fstat.c b/src/grep/lib/fstat.c
new file mode 100644
index 0000000..512c688
--- /dev/null
+++ b/src/grep/lib/fstat.c
@@ -0,0 +1,94 @@
+/* fstat() replacement.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* If the user's config.h happens to include <sys/stat.h>, let it include only
+   the system's <sys/stat.h> here, so that orig_fstat doesn't recurse to
+   rpl_fstat.  */
+#define __need_system_sys_stat_h
+#include <config.h>
+
+/* Get the original definition of fstat.  It might be defined as a macro.  */
+#include <sys/types.h>
+#include <sys/stat.h>
+#undef __need_system_sys_stat_h
+
+#if defined _WIN32 && ! defined __CYGWIN__
+# define WINDOWS_NATIVE
+#endif
+
+#if !defined WINDOWS_NATIVE
+
+static int
+orig_fstat (int fd, struct stat *buf)
+{
+  return fstat (fd, buf);
+}
+
+#endif
+
+/* Specification.  */
+#ifdef __osf__
+/* Write "sys/stat.h" here, not <sys/stat.h>, otherwise OSF/1 5.1 DTK cc
+   eliminates this include because of the preliminary #include <sys/stat.h>
+   above.  */
+# include "sys/stat.h"
+#else
+# include <sys/stat.h>
+#endif
+
+#include "stat-time.h"
+
+#include <errno.h>
+#include <unistd.h>
+#ifdef WINDOWS_NATIVE
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+# include "stat-w32.h"
+#endif
+
+int
+rpl_fstat (int fd, struct stat *buf)
+{
+#if REPLACE_FCHDIR && REPLACE_OPEN_DIRECTORY
+  /* Handle the case when rpl_open() used a dummy file descriptor to work
+     around an open() that can't normally visit directories.  */
+  const char *name = _gl_directory_name (fd);
+  if (name != NULL)
+    return stat (name, buf);
+#endif
+
+#ifdef WINDOWS_NATIVE
+  /* Fill the fields ourselves, because the original fstat function returns
+     values for st_atime, st_mtime, st_ctime that depend on the current time
+     zone.  See
+     <https://lists.gnu.org/r/bug-gnulib/2017-04/msg00134.html>  */
+  HANDLE h = (HANDLE) _get_osfhandle (fd);
+
+  if (h == INVALID_HANDLE_VALUE)
+    {
+      errno = EBADF;
+      return -1;
+    }
+  return _gl_fstat_by_handle (h, NULL, buf);
+#else
+  return stat_time_normalize (orig_fstat (fd, buf), buf);
+#endif
+}
diff --git a/src/grep/lib/fstatat.c b/src/grep/lib/fstatat.c
new file mode 100644
index 0000000..640a375
--- /dev/null
+++ b/src/grep/lib/fstatat.c
@@ -0,0 +1,148 @@
+/* Work around an fstatat bug on Solaris 9.
+
+   Copyright (C) 2006, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert and Jim Meyering.  */
+
+/* If the user's config.h happens to include <sys/stat.h>, let it include only
+   the system's <sys/stat.h> here, so that orig_fstatat doesn't recurse to
+   rpl_fstatat.  */
+#define __need_system_sys_stat_h
+#include <config.h>
+
+/* Get the original definition of fstatat.  It might be defined as a macro.  */
+#include <sys/types.h>
+#include <sys/stat.h>
+#undef __need_system_sys_stat_h
+
+#if HAVE_FSTATAT && HAVE_WORKING_FSTATAT_ZERO_FLAG
+static int
+orig_fstatat (int fd, char const *filename, struct stat *buf, int flags)
+{
+  return fstatat (fd, filename, buf, flags);
+}
+#endif
+
+#ifdef __osf__
+/* Write "sys/stat.h" here, not <sys/stat.h>, otherwise OSF/1 5.1 DTK cc
+   eliminates this include because of the preliminary #include <sys/stat.h>
+   above.  */
+# include "sys/stat.h"
+#else
+# include <sys/stat.h>
+#endif
+
+#include "stat-time.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if HAVE_FSTATAT && HAVE_WORKING_FSTATAT_ZERO_FLAG
+
+# ifndef LSTAT_FOLLOWS_SLASHED_SYMLINK
+#  define LSTAT_FOLLOWS_SLASHED_SYMLINK 0
+# endif
+
+static int
+normal_fstatat (int fd, char const *file, struct stat *st, int flag)
+{
+  return stat_time_normalize (orig_fstatat (fd, file, st, flag), st);
+}
+
+/* fstatat should always follow symbolic links that end in /, but on
+   Solaris 9 it doesn't if AT_SYMLINK_NOFOLLOW is specified.
+   Likewise, trailing slash on a non-directory should be an error.
+   These are the same problems that lstat.c and stat.c address, so
+   solve it in a similar way.
+
+   AIX 7.1 fstatat (AT_FDCWD, ..., 0) always fails, which is a bug.
+   Work around this bug if FSTATAT_AT_FDCWD_0_BROKEN is nonzero.  */
+
+int
+rpl_fstatat (int fd, char const *file, struct stat *st, int flag)
+{
+  int result = normal_fstatat (fd, file, st, flag);
+  size_t len;
+
+  if (LSTAT_FOLLOWS_SLASHED_SYMLINK || result != 0)
+    return result;
+  len = strlen (file);
+  if (flag & AT_SYMLINK_NOFOLLOW)
+    {
+      /* Fix lstat behavior.  */
+      if (file[len - 1] != '/' || S_ISDIR (st->st_mode))
+        return 0;
+      if (!S_ISLNK (st->st_mode))
+        {
+          errno = ENOTDIR;
+          return -1;
+        }
+      result = normal_fstatat (fd, file, st, flag & ~AT_SYMLINK_NOFOLLOW);
+    }
+  /* Fix stat behavior.  */
+  if (result == 0 && !S_ISDIR (st->st_mode) && file[len - 1] == '/')
+    {
+      errno = ENOTDIR;
+      return -1;
+    }
+  return result;
+}
+
+#else /* ! (HAVE_FSTATAT && HAVE_WORKING_FSTATAT_ZERO_FLAG) */
+
+/* On mingw, the gnulib <sys/stat.h> defines 'stat' as a function-like
+   macro; but using it in AT_FUNC_F2 causes compilation failure
+   because the preprocessor sees a use of a macro that requires two
+   arguments but is only given one.  Hence, we need an inline
+   forwarder to get past the preprocessor.  */
+static int
+stat_func (char const *name, struct stat *st)
+{
+  return stat (name, st);
+}
+
+/* Likewise, if there is no native 'lstat', then the gnulib
+   <sys/stat.h> defined it as stat, which also needs adjustment.  */
+# if !HAVE_LSTAT
+#  undef lstat
+#  define lstat stat_func
+# endif
+
+/* Replacement for Solaris' function by the same name.
+   <https://www.google.com/search?q=fstatat+site:docs.oracle.com>
+   First, try to simulate it via l?stat ("/proc/self/fd/FD/FILE").
+   Failing that, simulate it via save_cwd/fchdir/(stat|lstat)/restore_cwd.
+   If either the save_cwd or the restore_cwd fails (relatively unlikely),
+   then give a diagnostic and exit nonzero.
+   Otherwise, this function works just like Solaris' fstatat.  */
+
+# define AT_FUNC_NAME fstatat
+# define AT_FUNC_F1 lstat
+# define AT_FUNC_F2 stat_func
+# define AT_FUNC_USE_F1_COND AT_SYMLINK_NOFOLLOW
+# define AT_FUNC_POST_FILE_PARAM_DECLS , struct stat *st, int flag
+# define AT_FUNC_POST_FILE_ARGS        , st
+# include "at-func.c"
+# undef AT_FUNC_NAME
+# undef AT_FUNC_F1
+# undef AT_FUNC_F2
+# undef AT_FUNC_USE_F1_COND
+# undef AT_FUNC_POST_FILE_PARAM_DECLS
+# undef AT_FUNC_POST_FILE_ARGS
+
+#endif /* !HAVE_FSTATAT */
diff --git a/src/grep/lib/fts-cycle.c b/src/grep/lib/fts-cycle.c
new file mode 100644
index 0000000..5e04b54
--- /dev/null
+++ b/src/grep/lib/fts-cycle.c
@@ -0,0 +1,160 @@
+/* Detect cycles in file tree walks.
+
+   Copyright (C) 2003-2006, 2009-2021 Free Software Foundation, Inc.
+
+   Written by Jim Meyering.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include "cycle-check.h"
+#include "hash.h"
+
+/* Use each of these to map a device/inode pair to an FTSENT.  */
+struct Active_dir
+{
+  dev_t dev;
+  ino_t ino;
+  FTSENT *fts_ent;
+};
+
+static bool
+AD_compare (void const *x, void const *y)
+{
+  struct Active_dir const *ax = x;
+  struct Active_dir const *ay = y;
+  return ax->ino == ay->ino
+      && ax->dev == ay->dev;
+}
+
+static size_t
+AD_hash (void const *x, size_t table_size)
+{
+  struct Active_dir const *ax = x;
+  return (uintmax_t) ax->ino % table_size;
+}
+
+/* Set up the cycle-detection machinery.  */
+
+static bool
+setup_dir (FTS *fts)
+{
+  if (fts->fts_options & (FTS_TIGHT_CYCLE_CHECK | FTS_LOGICAL))
+    {
+      enum { HT_INITIAL_SIZE = 31 };
+      fts->fts_cycle.ht = hash_initialize (HT_INITIAL_SIZE, NULL, AD_hash,
+                                           AD_compare, free);
+      if (! fts->fts_cycle.ht)
+        return false;
+    }
+  else
+    {
+      fts->fts_cycle.state = malloc (sizeof *fts->fts_cycle.state);
+      if (! fts->fts_cycle.state)
+        return false;
+      cycle_check_init (fts->fts_cycle.state);
+    }
+
+  return true;
+}
+
+/* Enter a directory during a file tree walk.  */
+
+static bool
+enter_dir (FTS *fts, FTSENT *ent)
+{
+  if (fts->fts_options & (FTS_TIGHT_CYCLE_CHECK | FTS_LOGICAL))
+    {
+      struct stat const *st = ent->fts_statp;
+      struct Active_dir *ad = malloc (sizeof *ad);
+      struct Active_dir *ad_from_table;
+
+      if (!ad)
+        return false;
+
+      ad->dev = st->st_dev;
+      ad->ino = st->st_ino;
+      ad->fts_ent = ent;
+
+      /* See if we've already encountered this directory.
+         This can happen when following symlinks as well as
+         with a corrupted directory hierarchy. */
+      ad_from_table = hash_insert (fts->fts_cycle.ht, ad);
+
+      if (ad_from_table != ad)
+        {
+          free (ad);
+          if (!ad_from_table)
+            return false;
+
+          /* There was an entry with matching dev/inode already in the table.
+             Record the fact that we've found a cycle.  */
+          ent->fts_cycle = ad_from_table->fts_ent;
+          ent->fts_info = FTS_DC;
+        }
+    }
+  else
+    {
+      if (cycle_check (fts->fts_cycle.state, ent->fts_statp))
+        {
+          /* FIXME: setting fts_cycle like this isn't proper.
+             To do what the documentation requires, we'd have to
+             go around the cycle again and find the right entry.
+             But no callers in coreutils use the fts_cycle member. */
+          ent->fts_cycle = ent;
+          ent->fts_info = FTS_DC;
+        }
+    }
+
+  return true;
+}
+
+/* Leave a directory during a file tree walk.  */
+
+static void
+leave_dir (FTS *fts, FTSENT *ent)
+{
+  struct stat const *st = ent->fts_statp;
+  if (fts->fts_options & (FTS_TIGHT_CYCLE_CHECK | FTS_LOGICAL))
+    {
+      struct Active_dir obj;
+      void *found;
+      obj.dev = st->st_dev;
+      obj.ino = st->st_ino;
+      found = hash_remove (fts->fts_cycle.ht, &obj);
+      if (!found)
+        abort ();
+      free (found);
+    }
+  else
+    {
+      FTSENT *parent = ent->fts_parent;
+      if (parent != NULL && 0 <= parent->fts_level)
+        CYCLE_CHECK_REFLECT_CHDIR_UP (fts->fts_cycle.state,
+                                      *(parent->fts_statp), *st);
+    }
+}
+
+/* Free any memory used for cycle detection.  */
+
+static void
+free_dir (FTS *sp)
+{
+  if (sp->fts_options & (FTS_TIGHT_CYCLE_CHECK | FTS_LOGICAL))
+    {
+      if (sp->fts_cycle.ht)
+        hash_free (sp->fts_cycle.ht);
+    }
+  else
+    free (sp->fts_cycle.state);
+}
diff --git a/src/grep/lib/fts.c b/src/grep/lib/fts.c
new file mode 100644
index 0000000..e6603f4
--- /dev/null
+++ b/src/grep/lib/fts.c
@@ -0,0 +1,2085 @@
+/* Traverse a file hierarchy.
+
+   Copyright (C) 2004-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#if defined LIBC_SCCS && !defined GCC_LINT && !defined lint
+static char sccsid[] = "@(#)fts.c       8.6 (Berkeley) 8/14/94";
+#endif
+
+#include "fts_.h"
+
+#if HAVE_SYS_PARAM_H || defined _LIBC
+# include <sys/param.h>
+#endif
+#ifdef _LIBC
+# include <include/sys/stat.h>
+#else
+# include <sys/stat.h>
+#endif
+#include <fcntl.h>
+#include <errno.h>
+#include <stdalign.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#if ! _LIBC
+# include "attribute.h"
+# include "fcntl--.h"
+# include "flexmember.h"
+# include "openat.h"
+# include "opendirat.h"
+# include "same-inode.h"
+#endif
+
+#include <dirent.h>
+#ifndef _D_EXACT_NAMLEN
+# define _D_EXACT_NAMLEN(dirent) strlen ((dirent)->d_name)
+#endif
+
+#if HAVE_STRUCT_DIRENT_D_TYPE
+/* True if the type of the directory entry D is known.  */
+# define DT_IS_KNOWN(d) ((d)->d_type != DT_UNKNOWN)
+/* True if the type of the directory entry D must be T.  */
+# define DT_MUST_BE(d, t) ((d)->d_type == (t))
+# define D_TYPE(d) ((d)->d_type)
+#else
+# define DT_IS_KNOWN(d) false
+# define DT_MUST_BE(d, t) false
+# define D_TYPE(d) DT_UNKNOWN
+
+# undef DT_UNKNOWN
+# define DT_UNKNOWN 0
+
+/* Any nonzero values will do here, so long as they're distinct.
+   Undef any existing macros out of the way.  */
+# undef DT_BLK
+# undef DT_CHR
+# undef DT_DIR
+# undef DT_FIFO
+# undef DT_LNK
+# undef DT_REG
+# undef DT_SOCK
+# define DT_BLK 1
+# define DT_CHR 2
+# define DT_DIR 3
+# define DT_FIFO 4
+# define DT_LNK 5
+# define DT_REG 6
+# define DT_SOCK 7
+#endif
+
+#ifndef S_IFLNK
+# define S_IFLNK 0
+#endif
+#ifndef S_IFSOCK
+# define S_IFSOCK 0
+#endif
+
+enum
+{
+  NOT_AN_INODE_NUMBER = 0
+};
+
+#ifdef D_INO_IN_DIRENT
+# define D_INO(dp) (dp)->d_ino
+#else
+/* Some systems don't have inodes, so fake them to avoid lots of ifdefs.  */
+# define D_INO(dp) NOT_AN_INODE_NUMBER
+#endif
+
+/* If possible (see max_entries, below), read no more than this many directory
+   entries at a time.  Without this limit (i.e., when using non-NULL
+   fts_compar), processing a directory with 4,000,000 entries requires ~1GiB
+   of memory, and handling 64M entries would require 16GiB of memory.  */
+#ifndef FTS_MAX_READDIR_ENTRIES
+# define FTS_MAX_READDIR_ENTRIES 100000
+#endif
+
+/* If there are more than this many entries in a directory,
+   and the conditions mentioned below are satisfied, then sort
+   the entries on inode number before any further processing.  */
+#ifndef FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD
+# define FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD 10000
+#endif
+
+enum
+{
+  _FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD = FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD
+};
+
+enum Fts_stat
+{
+  FTS_NO_STAT_REQUIRED = 1,
+  FTS_STAT_REQUIRED = 2
+};
+
+#ifdef _LIBC
+# undef close
+# define close __close
+# undef closedir
+# define closedir __closedir
+# undef fchdir
+# define fchdir __fchdir
+# undef open
+# define open __open
+# undef readdir
+# define readdir __readdir
+#else
+# undef internal_function
+# define internal_function /* empty */
+#endif
+
+#ifndef __set_errno
+# define __set_errno(Val) errno = (Val)
+#endif
+
+/* If this host provides the openat function, then we can avoid
+   attempting to open "." in some initialization code below.  */
+#ifdef HAVE_OPENAT
+# define HAVE_OPENAT_SUPPORT 1
+#else
+# define HAVE_OPENAT_SUPPORT 0
+#endif
+
+#ifdef NDEBUG
+# define fts_assert(expr) ((void) (0 && (expr)))
+#else
+# define fts_assert(expr)       \
+    do                          \
+      {                         \
+        if (!(expr))            \
+          abort ();             \
+      }                         \
+    while (false)
+#endif
+
+#ifdef _LIBC
+# if __GNUC__ >= 7
+#  define FALLTHROUGH __attribute__ ((__fallthrough__))
+# else
+#  define FALLTHROUGH ((void) 0)
+# endif
+#endif
+
+static FTSENT   *fts_alloc (FTS *, const char *, size_t) internal_function;
+static FTSENT   *fts_build (FTS *, int) internal_function;
+static void      fts_lfree (FTSENT *) internal_function;
+static void      fts_load (FTS *, FTSENT *) internal_function;
+static size_t    fts_maxarglen (char * const *) internal_function;
+static void      fts_padjust (FTS *, FTSENT *) internal_function;
+static bool      fts_palloc (FTS *, size_t) internal_function;
+static FTSENT   *fts_sort (FTS *, FTSENT *, size_t) internal_function;
+static unsigned short int fts_stat (FTS *, FTSENT *, bool) internal_function;
+static int      fts_safe_changedir (FTS *, FTSENT *, int, const char *)
+     internal_function;
+
+#include "fts-cycle.c"
+
+#ifndef MAX
+# define MAX(a,b) ((a) > (b) ? (a) : (b))
+#endif
+
+#ifndef SIZE_MAX
+# define SIZE_MAX ((size_t) -1)
+#endif
+
+#define ISDOT(a)        (a[0] == '.' && (!a[1] || (a[1] == '.' && !a[2])))
+#define STREQ(a, b)     (strcmp (a, b) == 0)
+
+#define CLR(opt)        (sp->fts_options &= ~(opt))
+#define ISSET(opt)      (sp->fts_options & (opt))
+#define SET(opt)        (sp->fts_options |= (opt))
+
+/* FIXME: FTS_NOCHDIR is now misnamed.
+   Call it FTS_USE_FULL_RELATIVE_FILE_NAMES instead. */
+#define FCHDIR(sp, fd)                                  \
+  (!ISSET(FTS_NOCHDIR) && (ISSET(FTS_CWDFD)             \
+                           ? (cwd_advance_fd ((sp), (fd), true), 0) \
+                           : fchdir (fd)))
+
+
+/* fts_build flags */
+/* FIXME: make this an enum */
+#define BCHILD          1               /* fts_children */
+#define BNAMES          2               /* fts_children, names only */
+#define BREAD           3               /* fts_read */
+
+#if FTS_DEBUG
+# include <inttypes.h>
+# include <stdint.h>
+# include <stdio.h>
+# include "getcwdat.h"
+bool fts_debug = false;
+# define Dprintf(x) do { if (fts_debug) printf x; } while (false)
+#else
+# define Dprintf(x)
+# define fd_ring_check(x)
+# define fd_ring_print(a, b, c)
+#endif
+
+#define LEAVE_DIR(Fts, Ent, Tag)                                \
+  do                                                            \
+    {                                                           \
+      Dprintf (("  %s-leaving: %s\n", Tag, (Ent)->fts_path));   \
+      leave_dir (Fts, Ent);                                     \
+      fd_ring_check (Fts);                                      \
+    }                                                           \
+  while (false)
+
+static void
+fd_ring_clear (I_ring *fd_ring)
+{
+  while ( ! i_ring_empty (fd_ring))
+    {
+      int fd = i_ring_pop (fd_ring);
+      if (0 <= fd)
+        close (fd);
+    }
+}
+
+/* Overload the fts_statp->st_size member (otherwise unused, when
+   fts_info is FTS_NSOK) to indicate whether fts_read should stat
+   this entry or not.  */
+static void
+fts_set_stat_required (FTSENT *p, bool required)
+{
+  fts_assert (p->fts_info == FTS_NSOK);
+  p->fts_statp->st_size = (required
+                           ? FTS_STAT_REQUIRED
+                           : FTS_NO_STAT_REQUIRED);
+}
+
+/* Virtual fchdir.  Advance SP's working directory file descriptor,
+   SP->fts_cwd_fd, to FD, and push the previous value onto the fd_ring.
+   CHDIR_DOWN_ONE is true if FD corresponds to an entry in the directory
+   open on sp->fts_cwd_fd; i.e., to move the working directory one level
+   down.  */
+static void
+internal_function
+cwd_advance_fd (FTS *sp, int fd, bool chdir_down_one)
+{
+  int old = sp->fts_cwd_fd;
+  fts_assert (old != fd || old == AT_FDCWD);
+
+  if (chdir_down_one)
+    {
+      /* Push "old" onto the ring.
+         If the displaced file descriptor is non-negative, close it.  */
+      int prev_fd_in_slot = i_ring_push (&sp->fts_fd_ring, old);
+      fd_ring_print (sp, stderr, "post-push");
+      if (0 <= prev_fd_in_slot)
+        close (prev_fd_in_slot); /* ignore any close failure */
+    }
+  else if ( ! ISSET (FTS_NOCHDIR))
+    {
+      if (0 <= old)
+        close (old); /* ignore any close failure */
+    }
+
+  sp->fts_cwd_fd = fd;
+}
+
+/* Restore the initial, pre-traversal, "working directory".
+   In FTS_CWDFD mode, we merely call cwd_advance_fd, otherwise,
+   we may actually change the working directory.
+   Return 0 upon success. Upon failure, set errno and return nonzero.  */
+static int
+restore_initial_cwd (FTS *sp)
+{
+  int fail = FCHDIR (sp, ISSET (FTS_CWDFD) ? AT_FDCWD : sp->fts_rfd);
+  fd_ring_clear (&(sp->fts_fd_ring));
+  return fail;
+}
+
+/* Open the directory DIR if possible, and return a file
+   descriptor.  Return -1 and set errno on failure.  It doesn't matter
+   whether the file descriptor has read or write access.  */
+
+static int
+internal_function
+diropen (FTS const *sp, char const *dir)
+{
+  int open_flags = (O_SEARCH | O_CLOEXEC | O_DIRECTORY | O_NOCTTY | O_NONBLOCK
+                    | (ISSET (FTS_PHYSICAL) ? O_NOFOLLOW : 0));
+
+  int fd = (ISSET (FTS_CWDFD)
+            ? openat (sp->fts_cwd_fd, dir, open_flags)
+            : open (dir, open_flags));
+  return fd;
+}
+
+FTS *
+fts_open (char * const *argv,
+          register int options,
+          int (*compar) (FTSENT const **, FTSENT const **))
+{
+        register FTS *sp;
+        register FTSENT *p, *root;
+        register size_t nitems;
+        FTSENT *parent = NULL;
+        FTSENT *tmp = NULL;     /* pacify gcc */
+        bool defer_stat;
+
+        /* Options check. */
+        if (options & ~FTS_OPTIONMASK) {
+                __set_errno (EINVAL);
+                return (NULL);
+        }
+        if ((options & FTS_NOCHDIR) && (options & FTS_CWDFD)) {
+                __set_errno (EINVAL);
+                return (NULL);
+        }
+        if ( ! (options & (FTS_LOGICAL | FTS_PHYSICAL))) {
+                __set_errno (EINVAL);
+                return (NULL);
+        }
+
+        /* Allocate/initialize the stream */
+        sp = calloc (1, sizeof *sp);
+        if (sp == NULL)
+                return (NULL);
+        sp->fts_compar = compar;
+        sp->fts_options = options;
+
+        /* Logical walks turn on NOCHDIR; symbolic links are too hard. */
+        if (ISSET(FTS_LOGICAL)) {
+                SET(FTS_NOCHDIR);
+                CLR(FTS_CWDFD);
+        }
+
+        /* Initialize fts_cwd_fd.  */
+        sp->fts_cwd_fd = AT_FDCWD;
+        if ( ISSET(FTS_CWDFD) && ! HAVE_OPENAT_SUPPORT)
+          {
+            /* While it isn't technically necessary to open "." this
+               early, doing it here saves us the trouble of ensuring
+               later (where it'd be messier) that "." can in fact
+               be opened.  If not, revert to FTS_NOCHDIR mode.  */
+            int fd = open (".", O_SEARCH | O_CLOEXEC);
+            if (fd < 0)
+              {
+                /* Even if "." is unreadable, don't revert to FTS_NOCHDIR mode
+                   on systems like Linux+PROC_FS, where our openat emulation
+                   is good enough.  Note: on a system that emulates
+                   openat via /proc, this technique can still fail, but
+                   only in extreme conditions, e.g., when the working
+                   directory cannot be saved (i.e. save_cwd fails) --
+                   and that happens on Linux only when "." is unreadable
+                   and the CWD would be longer than PATH_MAX.
+                   FIXME: once Linux kernel openat support is well established,
+                   replace the above open call and this entire if/else block
+                   with the body of the if-block below.  */
+                if ( openat_needs_fchdir ())
+                  {
+                    SET(FTS_NOCHDIR);
+                    CLR(FTS_CWDFD);
+                  }
+              }
+            else
+              {
+                close (fd);
+              }
+          }
+
+        /*
+         * Start out with 1K of file name space, and enough, in any case,
+         * to hold the user's file names.
+         */
+#ifndef MAXPATHLEN
+# define MAXPATHLEN 1024
+#endif
+        {
+          size_t maxarglen = fts_maxarglen(argv);
+          if (! fts_palloc(sp, MAX(maxarglen, MAXPATHLEN)))
+                  goto mem1;
+        }
+
+        /* Allocate/initialize root's parent. */
+        if (*argv != NULL) {
+                if ((parent = fts_alloc(sp, "", 0)) == NULL)
+                        goto mem2;
+                parent->fts_level = FTS_ROOTPARENTLEVEL;
+          }
+
+        /* The classic fts implementation would call fts_stat with
+           a new entry for each iteration of the loop below.
+           If the comparison function is not specified or if the
+           FTS_DEFER_STAT option is in effect, don't stat any entry
+           in this loop.  This is an attempt to minimize the interval
+           between the initial stat/lstat/fstatat and the point at which
+           a directory argument is first opened.  This matters for any
+           directory command line argument that resides on a file system
+           without genuine i-nodes.  If you specify FTS_DEFER_STAT along
+           with a comparison function, that function must not access any
+           data via the fts_statp pointer.  */
+        defer_stat = (compar == NULL || ISSET(FTS_DEFER_STAT));
+
+        /* Allocate/initialize root(s). */
+        for (root = NULL, nitems = 0; *argv != NULL; ++argv, ++nitems) {
+                /* *Do* allow zero-length file names. */
+                size_t len = strlen(*argv);
+
+                if ( ! (options & FTS_VERBATIM))
+                  {
+                    /* If there are two or more trailing slashes, trim all but one,
+                       but don't change "//" to "/", and do map "///" to "/".  */
+                    char const *v = *argv;
+                    if (2 < len && v[len - 1] == '/')
+                      while (1 < len && v[len - 2] == '/')
+                        --len;
+                  }
+
+                if ((p = fts_alloc(sp, *argv, len)) == NULL)
+                        goto mem3;
+                p->fts_level = FTS_ROOTLEVEL;
+                p->fts_parent = parent;
+                p->fts_accpath = p->fts_name;
+                /* Even when defer_stat is true, be sure to stat the first
+                   command line argument, since fts_read (at least with
+                   FTS_XDEV) requires that.  */
+                if (defer_stat && root != NULL) {
+                        p->fts_info = FTS_NSOK;
+                        fts_set_stat_required(p, true);
+                } else {
+                        p->fts_info = fts_stat(sp, p, false);
+                }
+
+                /*
+                 * If comparison routine supplied, traverse in sorted
+                 * order; otherwise traverse in the order specified.
+                 */
+                if (compar) {
+                        p->fts_link = root;
+                        root = p;
+                } else {
+                        p->fts_link = NULL;
+                        if (root == NULL)
+                                tmp = root = p;
+                        else {
+                                tmp->fts_link = p;
+                                tmp = p;
+                        }
+                }
+        }
+        if (compar && nitems > 1)
+                root = fts_sort(sp, root, nitems);
+
+        /*
+         * Allocate a dummy pointer and make fts_read think that we've just
+         * finished the node before the root(s); set p->fts_info to FTS_INIT
+         * so that everything about the "current" node is ignored.
+         */
+        if ((sp->fts_cur = fts_alloc(sp, "", 0)) == NULL)
+                goto mem3;
+        sp->fts_cur->fts_link = root;
+        sp->fts_cur->fts_info = FTS_INIT;
+        sp->fts_cur->fts_level = 1;
+        if (! setup_dir (sp))
+                goto mem3;
+
+        /*
+         * If using chdir(2), grab a file descriptor pointing to dot to ensure
+         * that we can get back here; this could be avoided for some file names,
+         * but almost certainly not worth the effort.  Slashes, symbolic links,
+         * and ".." are all fairly nasty problems.  Note, if we can't get the
+         * descriptor we run anyway, just more slowly.
+         */
+        if (!ISSET(FTS_NOCHDIR) && !ISSET(FTS_CWDFD)
+            && (sp->fts_rfd = diropen (sp, ".")) < 0)
+                SET(FTS_NOCHDIR);
+
+        i_ring_init (&sp->fts_fd_ring, -1);
+        return (sp);
+
+mem3:   fts_lfree(root);
+        free(parent);
+mem2:   free(sp->fts_path);
+mem1:   free(sp);
+        return (NULL);
+}
+
+static void
+internal_function
+fts_load (FTS *sp, register FTSENT *p)
+{
+        register size_t len;
+        register char *cp;
+
+        /*
+         * Load the stream structure for the next traversal.  Since we don't
+         * actually enter the directory until after the preorder visit, set
+         * the fts_accpath field specially so the chdir gets done to the right
+         * place and the user can access the first node.  From fts_open it's
+         * known that the file name will fit.
+         */
+        len = p->fts_pathlen = p->fts_namelen;
+        memmove(sp->fts_path, p->fts_name, len + 1);
+        if ((cp = strrchr(p->fts_name, '/')) && (cp != p->fts_name || cp[1])) {
+                len = strlen(++cp);
+                memmove(p->fts_name, cp, len + 1);
+                p->fts_namelen = len;
+        }
+        p->fts_accpath = p->fts_path = sp->fts_path;
+}
+
+int
+fts_close (FTS *sp)
+{
+        register FTSENT *freep, *p;
+        int saved_errno = 0;
+
+        /*
+         * This still works if we haven't read anything -- the dummy structure
+         * points to the root list, so we step through to the end of the root
+         * list which has a valid parent pointer.
+         */
+        if (sp->fts_cur) {
+                for (p = sp->fts_cur; p->fts_level >= FTS_ROOTLEVEL;) {
+                        freep = p;
+                        p = p->fts_link != NULL ? p->fts_link : p->fts_parent;
+                        free(freep);
+                }
+                free(p);
+        }
+
+        /* Free up child linked list, sort array, file name buffer. */
+        if (sp->fts_child)
+                fts_lfree(sp->fts_child);
+        free(sp->fts_array);
+        free(sp->fts_path);
+
+        if (ISSET(FTS_CWDFD))
+          {
+            if (0 <= sp->fts_cwd_fd)
+              if (close (sp->fts_cwd_fd))
+                saved_errno = errno;
+          }
+        else if (!ISSET(FTS_NOCHDIR))
+          {
+            /* Return to original directory, save errno if necessary. */
+            if (fchdir(sp->fts_rfd))
+              saved_errno = errno;
+
+            /* If close fails, record errno only if saved_errno is zero,
+               so that we report the probably-more-meaningful fchdir errno.  */
+            if (close (sp->fts_rfd))
+              if (saved_errno == 0)
+                saved_errno = errno;
+          }
+
+        fd_ring_clear (&sp->fts_fd_ring);
+
+        if (sp->fts_leaf_optimization_works_ht)
+          hash_free (sp->fts_leaf_optimization_works_ht);
+
+        free_dir (sp);
+
+        /* Free up the stream pointer. */
+        free(sp);
+
+        /* Set errno and return. */
+        if (saved_errno) {
+                __set_errno (saved_errno);
+                return (-1);
+        }
+
+        return (0);
+}
+
+/* Minimum link count of a traditional Unix directory.  When leaf
+   optimization is OK and a directory's st_nlink == MIN_DIR_NLINK,
+   then the directory has no subdirectories.  */
+enum { MIN_DIR_NLINK = 2 };
+
+/* Whether leaf optimization is OK for a directory.  */
+enum leaf_optimization
+  {
+    /* st_nlink is not reliable for this directory's subdirectories.  */
+    NO_LEAF_OPTIMIZATION,
+
+    /* st_nlink == 2 means the directory lacks subdirectories.  */
+    OK_LEAF_OPTIMIZATION
+  };
+
+#if (defined __linux__ || defined __ANDROID__) \
+  && HAVE_SYS_VFS_H && HAVE_FSTATFS && HAVE_STRUCT_STATFS_F_TYPE
+
+# include <sys/vfs.h>
+
+/* Linux-specific constants from coreutils' src/fs.h */
+# define S_MAGIC_AFS 0x5346414F
+# define S_MAGIC_CIFS 0xFF534D42
+# define S_MAGIC_NFS 0x6969
+# define S_MAGIC_PROC 0x9FA0
+# define S_MAGIC_TMPFS 0x1021994
+
+# ifdef HAVE___FSWORD_T
+typedef __fsword_t fsword;
+# else
+typedef long int fsword;
+# endif
+
+/* Map a stat.st_dev number to a file system type number f_ftype.  */
+struct dev_type
+{
+  dev_t st_dev;
+  fsword f_type;
+};
+
+/* Use a tiny initial size.  If a traversal encounters more than
+   a few devices, the cost of growing/rehashing this table will be
+   rendered negligible by the number of inodes processed.  */
+enum { DEV_TYPE_HT_INITIAL_SIZE = 13 };
+
+static size_t
+dev_type_hash (void const *x, size_t table_size)
+{
+  struct dev_type const *ax = x;
+  uintmax_t dev = ax->st_dev;
+  return dev % table_size;
+}
+
+static bool
+dev_type_compare (void const *x, void const *y)
+{
+  struct dev_type const *ax = x;
+  struct dev_type const *ay = y;
+  return ax->st_dev == ay->st_dev;
+}
+
+/* Return the file system type of P with file descriptor FD, or 0 if not known.
+   If FD is negative, P's file descriptor is unavailable.
+   Try to cache known values.  */
+
+static fsword
+filesystem_type (FTSENT const *p, int fd)
+{
+  FTS *sp = p->fts_fts;
+  Hash_table *h = sp->fts_leaf_optimization_works_ht;
+  struct dev_type *ent;
+  struct statfs fs_buf;
+
+  /* If we're not in CWDFD mode, don't bother with this optimization,
+     since the caller is not serious about performance.  */
+  if (!ISSET (FTS_CWDFD))
+    return 0;
+
+  if (! h)
+    h = sp->fts_leaf_optimization_works_ht
+      = hash_initialize (DEV_TYPE_HT_INITIAL_SIZE, NULL, dev_type_hash,
+                         dev_type_compare, free);
+  if (h)
+    {
+      struct dev_type tmp;
+      tmp.st_dev = p->fts_statp->st_dev;
+      ent = hash_lookup (h, &tmp);
+      if (ent)
+        return ent->f_type;
+    }
+
+  /* Look-up failed.  Query directly and cache the result.  */
+  if (fd < 0 || fstatfs (fd, &fs_buf) != 0)
+    return 0;
+
+  if (h)
+    {
+      struct dev_type *t2 = malloc (sizeof *t2);
+      if (t2)
+        {
+          t2->st_dev = p->fts_statp->st_dev;
+          t2->f_type = fs_buf.f_type;
+
+          ent = hash_insert (h, t2);
+          if (ent)
+            fts_assert (ent == t2);
+          else
+            free (t2);
+        }
+    }
+
+  return fs_buf.f_type;
+}
+
+/* Return true if sorting dirents on inode numbers is known to improve
+   traversal performance for the directory P with descriptor DIR_FD.
+   Return false otherwise.  When in doubt, return true.
+   DIR_FD is negative if unavailable.  */
+static bool
+dirent_inode_sort_may_be_useful (FTSENT const *p, int dir_fd)
+{
+  /* Skip the sort only if we can determine efficiently
+     that skipping it is the right thing to do.
+     The cost of performing an unnecessary sort is negligible,
+     while the cost of *not* performing it can be O(N^2) with
+     a very large constant.  */
+
+  switch (filesystem_type (p, dir_fd))
+    {
+    case S_MAGIC_CIFS:
+    case S_MAGIC_NFS:
+    case S_MAGIC_TMPFS:
+      /* On a file system of any of these types, sorting
+         is unnecessary, and hence wasteful.  */
+      return false;
+
+    default:
+      return true;
+    }
+}
+
+/* Given an FTS entry P for a directory with descriptor DIR_FD,
+   return whether it is valid to apply leaf optimization.
+   The optimization is valid if a directory's st_nlink value equal
+   to MIN_DIR_NLINK means the directory has no subdirectories.
+   DIR_FD is negative if unavailable.  */
+static enum leaf_optimization
+leaf_optimization (FTSENT const *p, int dir_fd)
+{
+  switch (filesystem_type (p, dir_fd))
+    {
+    case 0:
+      /* Leaf optimization is unsafe if the file system type is unknown.  */
+      FALLTHROUGH;
+    case S_MAGIC_AFS:
+      /* Although AFS mount points are not counted in st_nlink, they
+         act like directories.  See <https://bugs.debian.org/143111>.  */
+      FALLTHROUGH;
+    case S_MAGIC_CIFS:
+      /* Leaf optimization causes 'find' to abort.  See
+         <https://lists.gnu.org/r/bug-gnulib/2018-04/msg00015.html>.  */
+      FALLTHROUGH;
+    case S_MAGIC_NFS:
+      /* NFS provides usable dirent.d_type but not necessarily for all entries
+         of large directories, so as per <https://bugzilla.redhat.com/1252549>
+         NFS should return true.  However st_nlink values are not accurate on
+         all implementations as per <https://bugzilla.redhat.com/1299169>.  */
+      FALLTHROUGH;
+    case S_MAGIC_PROC:
+      /* Per <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=143111> /proc
+         may have bogus stat.st_nlink values.  */
+      return NO_LEAF_OPTIMIZATION;
+
+    default:
+      return OK_LEAF_OPTIMIZATION;
+    }
+}
+
+#else
+static bool
+dirent_inode_sort_may_be_useful (FTSENT const *p _GL_UNUSED,
+                                 int dir_fd _GL_UNUSED)
+{
+  return true;
+}
+static enum leaf_optimization
+leaf_optimization (FTSENT const *p _GL_UNUSED, int dir_fd _GL_UNUSED)
+{
+  return NO_LEAF_OPTIMIZATION;
+}
+#endif
+
+/*
+ * Special case of "/" at the end of the file name so that slashes aren't
+ * appended which would cause file names to be written as "....//foo".
+ */
+#define NAPPEND(p)                                                      \
+        (p->fts_path[p->fts_pathlen - 1] == '/'                         \
+            ? p->fts_pathlen - 1 : p->fts_pathlen)
+
+FTSENT *
+fts_read (register FTS *sp)
+{
+        register FTSENT *p, *tmp;
+        register unsigned short int instr;
+        register char *t;
+
+        /* If finished or unrecoverable error, return NULL. */
+        if (sp->fts_cur == NULL || ISSET(FTS_STOP))
+                return (NULL);
+
+        /* Set current node pointer. */
+        p = sp->fts_cur;
+
+        /* Save and zero out user instructions. */
+        instr = p->fts_instr;
+        p->fts_instr = FTS_NOINSTR;
+
+        /* Any type of file may be re-visited; re-stat and re-turn. */
+        if (instr == FTS_AGAIN) {
+                p->fts_info = fts_stat(sp, p, false);
+                return (p);
+        }
+        Dprintf (("fts_read: p=%s\n",
+                  p->fts_info == FTS_INIT ? "" : p->fts_path));
+
+        /*
+         * Following a symlink -- SLNONE test allows application to see
+         * SLNONE and recover.  If indirecting through a symlink, have
+         * keep a pointer to current location.  If unable to get that
+         * pointer, follow fails.
+         */
+        if (instr == FTS_FOLLOW &&
+            (p->fts_info == FTS_SL || p->fts_info == FTS_SLNONE)) {
+                p->fts_info = fts_stat(sp, p, true);
+                if (p->fts_info == FTS_D && !ISSET(FTS_NOCHDIR)) {
+                        if ((p->fts_symfd = diropen (sp, ".")) < 0) {
+                                p->fts_errno = errno;
+                                p->fts_info = FTS_ERR;
+                        } else
+                                p->fts_flags |= FTS_SYMFOLLOW;
+                }
+                goto check_for_dir;
+        }
+
+        /* Directory in pre-order. */
+        if (p->fts_info == FTS_D) {
+                /* If skipped or crossed mount point, do post-order visit. */
+                if (instr == FTS_SKIP ||
+                    (ISSET(FTS_XDEV) && p->fts_statp->st_dev != sp->fts_dev)) {
+                        if (p->fts_flags & FTS_SYMFOLLOW)
+                                (void)close(p->fts_symfd);
+                        if (sp->fts_child) {
+                                fts_lfree(sp->fts_child);
+                                sp->fts_child = NULL;
+                        }
+                        p->fts_info = FTS_DP;
+                        LEAVE_DIR (sp, p, "1");
+                        return (p);
+                }
+
+                /* Rebuild if only read the names and now traversing. */
+                if (sp->fts_child != NULL && ISSET(FTS_NAMEONLY)) {
+                        CLR(FTS_NAMEONLY);
+                        fts_lfree(sp->fts_child);
+                        sp->fts_child = NULL;
+                }
+
+                /*
+                 * Cd to the subdirectory.
+                 *
+                 * If have already read and now fail to chdir, whack the list
+                 * to make the names come out right, and set the parent errno
+                 * so the application will eventually get an error condition.
+                 * Set the FTS_DONTCHDIR flag so that when we logically change
+                 * directories back to the parent we don't do a chdir.
+                 *
+                 * If haven't read do so.  If the read fails, fts_build sets
+                 * FTS_STOP or the fts_info field of the node.
+                 */
+                if (sp->fts_child != NULL) {
+                        if (fts_safe_changedir(sp, p, -1, p->fts_accpath)) {
+                                p->fts_errno = errno;
+                                p->fts_flags |= FTS_DONTCHDIR;
+                                for (p = sp->fts_child; p != NULL;
+                                     p = p->fts_link)
+                                        p->fts_accpath =
+                                            p->fts_parent->fts_accpath;
+                        }
+                } else if ((sp->fts_child = fts_build(sp, BREAD)) == NULL) {
+                        if (ISSET(FTS_STOP))
+                                return (NULL);
+                        /* If fts_build's call to fts_safe_changedir failed
+                           because it was not able to fchdir into a
+                           subdirectory, tell the caller.  */
+                        if (p->fts_errno && p->fts_info != FTS_DNR)
+                                p->fts_info = FTS_ERR;
+                        LEAVE_DIR (sp, p, "2");
+                        return (p);
+                }
+                p = sp->fts_child;
+                sp->fts_child = NULL;
+                goto name;
+        }
+
+        /* Move to the next node on this level. */
+next:   tmp = p;
+
+        /* If we have so many directory entries that we're reading them
+           in batches, and we've reached the end of the current batch,
+           read in a new batch.  */
+        if (p->fts_link == NULL && p->fts_parent->fts_dirp)
+          {
+            p = tmp->fts_parent;
+            sp->fts_cur = p;
+            sp->fts_path[p->fts_pathlen] = '\0';
+
+            if ((p = fts_build (sp, BREAD)) == NULL)
+              {
+                if (ISSET(FTS_STOP))
+                  return NULL;
+                goto cd_dot_dot;
+              }
+
+            free(tmp);
+            goto name;
+          }
+
+        if ((p = p->fts_link) != NULL) {
+                sp->fts_cur = p;
+                free(tmp);
+
+                /*
+                 * If reached the top, return to the original directory (or
+                 * the root of the tree), and load the file names for the next
+                 * root.
+                 */
+                if (p->fts_level == FTS_ROOTLEVEL) {
+                        if (restore_initial_cwd(sp)) {
+                                SET(FTS_STOP);
+                                return (NULL);
+                        }
+                        free_dir(sp);
+                        fts_load(sp, p);
+                        setup_dir(sp);
+                        goto check_for_dir;
+                }
+
+                /*
+                 * User may have called fts_set on the node.  If skipped,
+                 * ignore.  If followed, get a file descriptor so we can
+                 * get back if necessary.
+                 */
+                if (p->fts_instr == FTS_SKIP)
+                        goto next;
+                if (p->fts_instr == FTS_FOLLOW) {
+                        p->fts_info = fts_stat(sp, p, true);
+                        if (p->fts_info == FTS_D && !ISSET(FTS_NOCHDIR)) {
+                                if ((p->fts_symfd = diropen (sp, ".")) < 0) {
+                                        p->fts_errno = errno;
+                                        p->fts_info = FTS_ERR;
+                                } else
+                                        p->fts_flags |= FTS_SYMFOLLOW;
+                        }
+                        p->fts_instr = FTS_NOINSTR;
+                }
+
+name:           t = sp->fts_path + NAPPEND(p->fts_parent);
+                *t++ = '/';
+                memmove(t, p->fts_name, p->fts_namelen + 1);
+check_for_dir:
+                sp->fts_cur = p;
+                if (p->fts_info == FTS_NSOK)
+                  {
+                    if (p->fts_statp->st_size == FTS_STAT_REQUIRED)
+                      p->fts_info = fts_stat(sp, p, false);
+                    else
+                      fts_assert (p->fts_statp->st_size == FTS_NO_STAT_REQUIRED);
+                  }
+
+                if (p->fts_info == FTS_D)
+                  {
+                    /* Now that P->fts_statp is guaranteed to be valid,
+                       if this is a command-line directory, record its
+                       device number, to be used for FTS_XDEV.  */
+                    if (p->fts_level == FTS_ROOTLEVEL)
+                      sp->fts_dev = p->fts_statp->st_dev;
+                    Dprintf (("  entering: %s\n", p->fts_path));
+                    if (! enter_dir (sp, p))
+                      {
+                        __set_errno (ENOMEM);
+                        return NULL;
+                      }
+                  }
+                return p;
+        }
+cd_dot_dot:
+
+        /* Move up to the parent node. */
+        p = tmp->fts_parent;
+        sp->fts_cur = p;
+        free(tmp);
+
+        if (p->fts_level == FTS_ROOTPARENTLEVEL) {
+                /*
+                 * Done; free everything up and set errno to 0 so the user
+                 * can distinguish between error and EOF.
+                 */
+                free(p);
+                __set_errno (0);
+                return (sp->fts_cur = NULL);
+        }
+
+        fts_assert (p->fts_info != FTS_NSOK);
+
+        /* NUL terminate the file name.  */
+        sp->fts_path[p->fts_pathlen] = '\0';
+
+        /*
+         * Return to the parent directory.  If at a root node, restore
+         * the initial working directory.  If we came through a symlink,
+         * go back through the file descriptor.  Otherwise, move up
+         * one level, via "..".
+         */
+        if (p->fts_level == FTS_ROOTLEVEL) {
+                if (restore_initial_cwd(sp)) {
+                        p->fts_errno = errno;
+                        SET(FTS_STOP);
+                }
+        } else if (p->fts_flags & FTS_SYMFOLLOW) {
+                if (FCHDIR(sp, p->fts_symfd)) {
+                        p->fts_errno = errno;
+                        SET(FTS_STOP);
+                }
+                (void)close(p->fts_symfd);
+        } else if (!(p->fts_flags & FTS_DONTCHDIR) &&
+                   fts_safe_changedir(sp, p->fts_parent, -1, "..")) {
+                p->fts_errno = errno;
+                SET(FTS_STOP);
+        }
+
+        /* If the directory causes a cycle, preserve the FTS_DC flag and keep
+           the corresponding dev/ino pair in the hash table.  It is going to be
+           removed when leaving the original directory.  */
+        if (p->fts_info != FTS_DC) {
+                p->fts_info = p->fts_errno ? FTS_ERR : FTS_DP;
+                if (p->fts_errno == 0)
+                        LEAVE_DIR (sp, p, "3");
+        }
+        return ISSET(FTS_STOP) ? NULL : p;
+}
+
+/*
+ * Fts_set takes the stream as an argument although it's not used in this
+ * implementation; it would be necessary if anyone wanted to add global
+ * semantics to fts using fts_set.  An error return is allowed for similar
+ * reasons.
+ */
+/* ARGSUSED */
+int
+fts_set(FTS *sp _GL_UNUSED, FTSENT *p, int instr)
+{
+        if (instr != 0 && instr != FTS_AGAIN && instr != FTS_FOLLOW &&
+            instr != FTS_NOINSTR && instr != FTS_SKIP) {
+                __set_errno (EINVAL);
+                return (1);
+        }
+        p->fts_instr = instr;
+        return (0);
+}
+
+FTSENT *
+fts_children (register FTS *sp, int instr)
+{
+        register FTSENT *p;
+        int fd;
+
+        if (instr != 0 && instr != FTS_NAMEONLY) {
+                __set_errno (EINVAL);
+                return (NULL);
+        }
+
+        /* Set current node pointer. */
+        p = sp->fts_cur;
+
+        /*
+         * Errno set to 0 so user can distinguish empty directory from
+         * an error.
+         */
+        __set_errno (0);
+
+        /* Fatal errors stop here. */
+        if (ISSET(FTS_STOP))
+                return (NULL);
+
+        /* Return logical hierarchy of user's arguments. */
+        if (p->fts_info == FTS_INIT)
+                return (p->fts_link);
+
+        /*
+         * If not a directory being visited in pre-order, stop here.  Could
+         * allow FTS_DNR, assuming the user has fixed the problem, but the
+         * same effect is available with FTS_AGAIN.
+         */
+        if (p->fts_info != FTS_D /* && p->fts_info != FTS_DNR */)
+                return (NULL);
+
+        /* Free up any previous child list. */
+        if (sp->fts_child != NULL)
+                fts_lfree(sp->fts_child);
+
+        if (instr == FTS_NAMEONLY) {
+                SET(FTS_NAMEONLY);
+                instr = BNAMES;
+        } else
+                instr = BCHILD;
+
+        /*
+         * If using chdir on a relative file name and called BEFORE fts_read
+         * does its chdir to the root of a traversal, we can lose -- we need to
+         * chdir into the subdirectory, and we don't know where the current
+         * directory is, so we can't get back so that the upcoming chdir by
+         * fts_read will work.
+         */
+        if (p->fts_level != FTS_ROOTLEVEL || p->fts_accpath[0] == '/' ||
+            ISSET(FTS_NOCHDIR))
+                return (sp->fts_child = fts_build(sp, instr));
+
+        if ((fd = diropen (sp, ".")) < 0)
+                return (sp->fts_child = NULL);
+        sp->fts_child = fts_build(sp, instr);
+        if (ISSET(FTS_CWDFD))
+          {
+            cwd_advance_fd (sp, fd, true);
+          }
+        else
+          {
+            if (fchdir(fd))
+              {
+                int saved_errno = errno;
+                close (fd);
+                __set_errno (saved_errno);
+                return NULL;
+              }
+            close (fd);
+          }
+        return (sp->fts_child);
+}
+
+/* A comparison function to sort on increasing inode number.
+   For some file system types, sorting either way makes a huge
+   performance difference for a directory with very many entries,
+   but sorting on increasing values is slightly better than sorting
+   on decreasing values.  The difference is in the 5% range.  */
+static int
+fts_compare_ino (struct _ftsent const **a, struct _ftsent const **b)
+{
+  return _GL_CMP (a[0]->fts_statp->st_ino, b[0]->fts_statp->st_ino);
+}
+
+/* Map the dirent.d_type value, DTYPE, to the corresponding stat.st_mode
+   S_IF* bit and set ST.st_mode, thus clearing all other bits in that field.  */
+static void
+set_stat_type (struct stat *st, unsigned int dtype)
+{
+  mode_t type;
+  switch (dtype)
+    {
+    case DT_BLK:
+      type = S_IFBLK;
+      break;
+    case DT_CHR:
+      type = S_IFCHR;
+      break;
+    case DT_DIR:
+      type = S_IFDIR;
+      break;
+    case DT_FIFO:
+      type = S_IFIFO;
+      break;
+    case DT_LNK:
+      type = S_IFLNK;
+      break;
+    case DT_REG:
+      type = S_IFREG;
+      break;
+    case DT_SOCK:
+      type = S_IFSOCK;
+      break;
+    default:
+      type = 0;
+    }
+  st->st_mode = type;
+}
+
+#define closedir_and_clear(dirp)                \
+  do                                            \
+    {                                           \
+      closedir (dirp);                          \
+      dirp = NULL;                              \
+    }                                           \
+  while (0)
+
+#define fts_opendir(file, Pdir_fd)                              \
+        opendirat((! ISSET(FTS_NOCHDIR) && ISSET(FTS_CWDFD)     \
+                   ? sp->fts_cwd_fd : AT_FDCWD),                \
+                  file,                                         \
+                  (((ISSET(FTS_PHYSICAL)                        \
+                     && ! (ISSET(FTS_COMFOLLOW)                 \
+                           && cur->fts_level == FTS_ROOTLEVEL)) \
+                    ? O_NOFOLLOW : 0)),                         \
+                  Pdir_fd)
+
+/*
+ * This is the tricky part -- do not casually change *anything* in here.  The
+ * idea is to build the linked list of entries that are used by fts_children
+ * and fts_read.  There are lots of special cases.
+ *
+ * The real slowdown in walking the tree is the stat calls.  If FTS_NOSTAT is
+ * set and it's a physical walk (so that symbolic links can't be directories),
+ * we can do things quickly.  First, if it's a 4.4BSD file system, the type
+ * of the file is in the directory entry.  Otherwise, we assume that the number
+ * of subdirectories in a node is equal to the number of links to the parent.
+ * The former skips all stat calls.  The latter skips stat calls in any leaf
+ * directories and for any files after the subdirectories in the directory have
+ * been found, cutting the stat calls by about 2/3.
+ */
+static FTSENT *
+internal_function
+fts_build (register FTS *sp, int type)
+{
+        register FTSENT *p, *head;
+        register size_t nitems;
+        FTSENT *tail;
+        void *oldaddr;
+        int saved_errno;
+        bool descend;
+        bool doadjust;
+        ptrdiff_t level;
+        size_t len, maxlen, new_len;
+        char *cp;
+        int dir_fd;
+        FTSENT *cur = sp->fts_cur;
+        bool continue_readdir = !!cur->fts_dirp;
+        bool sort_by_inode = false;
+        size_t max_entries;
+
+        /* When cur->fts_dirp is non-NULL, that means we should
+           continue calling readdir on that existing DIR* pointer
+           rather than opening a new one.  */
+        if (continue_readdir)
+          {
+            DIR *dp = cur->fts_dirp;
+            dir_fd = dirfd (dp);
+            if (dir_fd < 0)
+              {
+                closedir_and_clear (cur->fts_dirp);
+                if (type == BREAD)
+                  {
+                    cur->fts_info = FTS_DNR;
+                    cur->fts_errno = errno;
+                  }
+                return NULL;
+              }
+          }
+        else
+          {
+            /* Open the directory for reading.  If this fails, we're done.
+               If being called from fts_read, set the fts_info field. */
+            if ((cur->fts_dirp = fts_opendir(cur->fts_accpath, &dir_fd)) == NULL)
+              {
+                if (type == BREAD)
+                  {
+                    cur->fts_info = FTS_DNR;
+                    cur->fts_errno = errno;
+                  }
+                return NULL;
+              }
+            /* Rather than calling fts_stat for each and every entry encountered
+               in the readdir loop (below), stat each directory only right after
+               opening it.  */
+            if (cur->fts_info == FTS_NSOK)
+              cur->fts_info = fts_stat(sp, cur, false);
+            else if (sp->fts_options & FTS_TIGHT_CYCLE_CHECK)
+              {
+                /* Now read the stat info again after opening a directory to
+                   reveal eventual changes caused by a submount triggered by
+                   the traversal.  But do it only for utilities which use
+                   FTS_TIGHT_CYCLE_CHECK.  Therefore, only find and du
+                   benefit/suffer from this feature for now.  */
+                LEAVE_DIR (sp, cur, "4");
+                fts_stat (sp, cur, false);
+                if (! enter_dir (sp, cur))
+                  {
+                    __set_errno (ENOMEM);
+                    return NULL;
+                  }
+              }
+          }
+
+        /* Maximum number of readdir entries to read at one time.  This
+           limitation is to avoid reading millions of entries into memory
+           at once.  When an fts_compar function is specified, we have no
+           choice: we must read all entries into memory before calling that
+           function.  But when no such function is specified, we can read
+           entries in batches that are large enough to help us with inode-
+           sorting, yet not so large that we risk exhausting memory.  */
+        max_entries = sp->fts_compar ? SIZE_MAX : FTS_MAX_READDIR_ENTRIES;
+
+        /*
+         * If we're going to need to stat anything or we want to descend
+         * and stay in the directory, chdir.  If this fails we keep going,
+         * but set a flag so we don't chdir after the post-order visit.
+         * We won't be able to stat anything, but we can still return the
+         * names themselves.  Note, that since fts_read won't be able to
+         * chdir into the directory, it will have to return different file
+         * names than before, i.e. "a/b" instead of "b".  Since the node
+         * has already been visited in pre-order, have to wait until the
+         * post-order visit to return the error.  There is a special case
+         * here, if there was nothing to stat then it's not an error to
+         * not be able to stat.  This is all fairly nasty.  If a program
+         * needed sorted entries or stat information, they had better be
+         * checking FTS_NS on the returned nodes.
+         */
+        if (continue_readdir)
+          {
+            /* When resuming a short readdir run, we already have
+               the required dirp and dir_fd.  */
+            descend = true;
+          }
+        else
+          {
+            /* Try to descend unless it is a names-only fts_children,
+               or the directory is known to lack subdirectories.  */
+            descend = (type != BNAMES
+                       && ! (ISSET (FTS_NOSTAT) && ISSET (FTS_PHYSICAL)
+                             && ! ISSET (FTS_SEEDOT)
+                             && cur->fts_statp->st_nlink == MIN_DIR_NLINK
+                             && (leaf_optimization (cur, dir_fd)
+                                 != NO_LEAF_OPTIMIZATION)));
+            if (descend || type == BREAD)
+              {
+                if (ISSET(FTS_CWDFD))
+                  dir_fd = fcntl (dir_fd, F_DUPFD_CLOEXEC, STDERR_FILENO + 1);
+                if (dir_fd < 0 || fts_safe_changedir(sp, cur, dir_fd, NULL)) {
+                        if (descend && type == BREAD)
+                                cur->fts_errno = errno;
+                        cur->fts_flags |= FTS_DONTCHDIR;
+                        descend = false;
+                        closedir_and_clear(cur->fts_dirp);
+                        if (ISSET(FTS_CWDFD) && 0 <= dir_fd)
+                                close (dir_fd);
+                        cur->fts_dirp = NULL;
+                } else
+                        descend = true;
+              }
+          }
+
+        /*
+         * Figure out the max file name length that can be stored in the
+         * current buffer -- the inner loop allocates more space as necessary.
+         * We really wouldn't have to do the maxlen calculations here, we
+         * could do them in fts_read before returning the name, but it's a
+         * lot easier here since the length is part of the dirent structure.
+         *
+         * If not changing directories set a pointer so that can just append
+         * each new component into the file name.
+         */
+        len = NAPPEND(cur);
+        if (ISSET(FTS_NOCHDIR)) {
+                cp = sp->fts_path + len;
+                *cp++ = '/';
+        } else {
+                /* GCC, you're too verbose. */
+                cp = NULL;
+        }
+        len++;
+        maxlen = sp->fts_pathlen - len;
+
+        level = cur->fts_level + 1;
+
+        /* Read the directory, attaching each entry to the "link" pointer. */
+        doadjust = false;
+        head = NULL;
+        tail = NULL;
+        nitems = 0;
+        while (cur->fts_dirp) {
+                size_t d_namelen;
+                __set_errno (0);
+                struct dirent *dp = readdir(cur->fts_dirp);
+                if (dp == NULL) {
+                        if (errno) {
+                                cur->fts_errno = errno;
+                                /* If we've not read any items yet, treat
+                                   the error as if we can't access the dir.  */
+                                cur->fts_info = (continue_readdir || nitems)
+                                                ? FTS_ERR : FTS_DNR;
+                        }
+                        break;
+                }
+                if (!ISSET(FTS_SEEDOT) && ISDOT(dp->d_name))
+                        continue;
+
+                d_namelen = _D_EXACT_NAMLEN (dp);
+                p = fts_alloc (sp, dp->d_name, d_namelen);
+                if (!p)
+                        goto mem1;
+                if (d_namelen >= maxlen) {
+                        /* include space for NUL */
+                        oldaddr = sp->fts_path;
+                        if (! fts_palloc(sp, d_namelen + len + 1)) {
+                                /*
+                                 * No more memory.  Save
+                                 * errno, free up the current structure and the
+                                 * structures already allocated.
+                                 */
+mem1:                           saved_errno = errno;
+                                free(p);
+                                fts_lfree(head);
+                                closedir_and_clear(cur->fts_dirp);
+                                cur->fts_info = FTS_ERR;
+                                SET(FTS_STOP);
+                                __set_errno (saved_errno);
+                                return (NULL);
+                        }
+                        /* Did realloc() change the pointer? */
+                        if (oldaddr != sp->fts_path) {
+                                doadjust = true;
+                                if (ISSET(FTS_NOCHDIR))
+                                        cp = sp->fts_path + len;
+                        }
+                        maxlen = sp->fts_pathlen - len;
+                }
+
+                new_len = len + d_namelen;
+                if (new_len < len) {
+                        /*
+                         * In the unlikely event that we would end up
+                         * with a file name longer than SIZE_MAX, free up
+                         * the current structure and the structures already
+                         * allocated, then error out with ENAMETOOLONG.
+                         */
+                        free(p);
+                        fts_lfree(head);
+                        closedir_and_clear(cur->fts_dirp);
+                        cur->fts_info = FTS_ERR;
+                        SET(FTS_STOP);
+                        __set_errno (ENAMETOOLONG);
+                        return (NULL);
+                }
+                p->fts_level = level;
+                p->fts_parent = sp->fts_cur;
+                p->fts_pathlen = new_len;
+
+                /* Store dirent.d_ino, in case we need to sort
+                   entries before processing them.  */
+                p->fts_statp->st_ino = D_INO (dp);
+
+                /* Build a file name for fts_stat to stat. */
+                if (ISSET(FTS_NOCHDIR)) {
+                        p->fts_accpath = p->fts_path;
+                        memmove(cp, p->fts_name, p->fts_namelen + 1);
+                } else
+                        p->fts_accpath = p->fts_name;
+
+                if (sp->fts_compar == NULL || ISSET(FTS_DEFER_STAT)) {
+                        /* Record what fts_read will have to do with this
+                           entry. In many cases, it will simply fts_stat it,
+                           but we can take advantage of any d_type information
+                           to optimize away the unnecessary stat calls.  I.e.,
+                           if FTS_NOSTAT is in effect and we're not following
+                           symlinks (FTS_PHYSICAL) and d_type indicates this
+                           is *not* a directory, then we won't have to stat it
+                           at all.  If it *is* a directory, then (currently)
+                           we stat it regardless, in order to get device and
+                           inode numbers.  Some day we might optimize that
+                           away, too, for directories where d_ino is known to
+                           be valid.  */
+                        bool skip_stat = (ISSET(FTS_NOSTAT)
+                                          && DT_IS_KNOWN(dp)
+                                          && ! DT_MUST_BE(dp, DT_DIR)
+                                          && (ISSET(FTS_PHYSICAL)
+                                              || ! DT_MUST_BE(dp, DT_LNK)));
+                        p->fts_info = FTS_NSOK;
+                        /* Propagate dirent.d_type information back
+                           to caller, when possible.  */
+                        set_stat_type (p->fts_statp, D_TYPE (dp));
+                        fts_set_stat_required(p, !skip_stat);
+                } else {
+                        p->fts_info = fts_stat(sp, p, false);
+                }
+
+                /* We walk in directory order so "ls -f" doesn't get upset. */
+                p->fts_link = NULL;
+                if (head == NULL)
+                        head = tail = p;
+                else {
+                        tail->fts_link = p;
+                        tail = p;
+                }
+
+                /* If there are many entries, no sorting function has been
+                   specified, and this file system is of a type that may be
+                   slow with a large number of entries, arrange to sort the
+                   directory entries on increasing inode numbers.
+
+                   The NITEMS comparison uses ==, not >, because the test
+                   needs to be tried at most once once, and NITEMS will exceed
+                   the threshold after it is incremented below.  */
+                if (nitems == _FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD
+                    && !sp->fts_compar)
+                  sort_by_inode = dirent_inode_sort_may_be_useful (cur, dir_fd);
+
+                ++nitems;
+                if (max_entries <= nitems) {
+                        /* When there are too many dir entries, leave
+                           fts_dirp open, so that a subsequent fts_read
+                           can take up where we leave off.  */
+                        goto break_without_closedir;
+                }
+        }
+
+        if (cur->fts_dirp)
+                closedir_and_clear(cur->fts_dirp);
+
+ break_without_closedir:
+
+        /*
+         * If realloc() changed the address of the file name, adjust the
+         * addresses for the rest of the tree and the dir list.
+         */
+        if (doadjust)
+                fts_padjust(sp, head);
+
+        /*
+         * If not changing directories, reset the file name back to original
+         * state.
+         */
+        if (ISSET(FTS_NOCHDIR)) {
+                if (len == sp->fts_pathlen || nitems == 0)
+                        --cp;
+                *cp = '\0';
+        }
+
+        /*
+         * If descended after called from fts_children or after called from
+         * fts_read and nothing found, get back.  At the root level we use
+         * the saved fd; if one of fts_open()'s arguments is a relative name
+         * to an empty directory, we wind up here with no other way back.  If
+         * can't get back, we're done.
+         */
+        if (!continue_readdir && descend && (type == BCHILD || !nitems) &&
+            (cur->fts_level == FTS_ROOTLEVEL
+             ? restore_initial_cwd(sp)
+             : fts_safe_changedir(sp, cur->fts_parent, -1, ".."))) {
+                cur->fts_info = FTS_ERR;
+                SET(FTS_STOP);
+                fts_lfree(head);
+                return (NULL);
+        }
+
+        /* If didn't find anything, return NULL. */
+        if (!nitems) {
+                if (type == BREAD
+                    && cur->fts_info != FTS_DNR && cur->fts_info != FTS_ERR)
+                        cur->fts_info = FTS_DP;
+                fts_lfree(head);
+                return (NULL);
+        }
+
+        if (sort_by_inode) {
+                sp->fts_compar = fts_compare_ino;
+                head = fts_sort (sp, head, nitems);
+                sp->fts_compar = NULL;
+        }
+
+        /* Sort the entries. */
+        if (sp->fts_compar && nitems > 1)
+                head = fts_sort(sp, head, nitems);
+        return (head);
+}
+
+#if FTS_DEBUG
+
+/* Walk ->fts_parent links starting at E_CURR, until the root of the
+   current hierarchy.  There should be a directory with dev/inode
+   matching those of AD.  If not, print a lot of diagnostics.  */
+static void
+find_matching_ancestor (FTSENT const *e_curr, struct Active_dir const *ad)
+{
+  FTSENT const *ent;
+  for (ent = e_curr; ent->fts_level >= FTS_ROOTLEVEL; ent = ent->fts_parent)
+    {
+      if (ad->ino == ent->fts_statp->st_ino
+          && ad->dev == ent->fts_statp->st_dev)
+        return;
+    }
+  printf ("ERROR: tree dir, %s, not active\n", ad->fts_ent->fts_accpath);
+  printf ("active dirs:\n");
+  for (ent = e_curr;
+       ent->fts_level >= FTS_ROOTLEVEL; ent = ent->fts_parent)
+    printf ("  %s(%"PRIuMAX"/%"PRIuMAX") to %s(%"PRIuMAX"/%"PRIuMAX")...\n",
+            ad->fts_ent->fts_accpath,
+            (uintmax_t) ad->dev,
+            (uintmax_t) ad->ino,
+            ent->fts_accpath,
+            (uintmax_t) ent->fts_statp->st_dev,
+            (uintmax_t) ent->fts_statp->st_ino);
+}
+
+void
+fts_cross_check (FTS const *sp)
+{
+  FTSENT const *ent = sp->fts_cur;
+  FTSENT const *t;
+  if ( ! ISSET (FTS_TIGHT_CYCLE_CHECK))
+    return;
+
+  Dprintf (("fts-cross-check cur=%s\n", ent->fts_path));
+  /* Make sure every parent dir is in the tree.  */
+  for (t = ent->fts_parent; t->fts_level >= FTS_ROOTLEVEL; t = t->fts_parent)
+    {
+      struct Active_dir ad;
+      ad.ino = t->fts_statp->st_ino;
+      ad.dev = t->fts_statp->st_dev;
+      if ( ! hash_lookup (sp->fts_cycle.ht, &ad))
+        printf ("ERROR: active dir, %s, not in tree\n", t->fts_path);
+    }
+
+  /* Make sure every dir in the tree is an active dir.
+     But ENT is not necessarily a directory.  If so, just skip this part. */
+  if (ent->fts_parent->fts_level >= FTS_ROOTLEVEL
+      && (ent->fts_info == FTS_DP
+          || ent->fts_info == FTS_D))
+    {
+      struct Active_dir *ad;
+      for (ad = hash_get_first (sp->fts_cycle.ht); ad != NULL;
+           ad = hash_get_next (sp->fts_cycle.ht, ad))
+        {
+          find_matching_ancestor (ent, ad);
+        }
+    }
+}
+
+static bool
+same_fd (int fd1, int fd2)
+{
+  struct stat sb1, sb2;
+  return (fstat (fd1, &sb1) == 0
+          && fstat (fd2, &sb2) == 0
+          && SAME_INODE (sb1, sb2));
+}
+
+static void
+fd_ring_print (FTS const *sp, FILE *stream, char const *msg)
+{
+  I_ring const *fd_ring = &sp->fts_fd_ring;
+  unsigned int i = fd_ring->fts_front;
+  char *cwd = getcwdat (sp->fts_cwd_fd, NULL, 0);
+  fprintf (stream, "=== %s ========== %s\n", msg, cwd);
+  free (cwd);
+  if (i_ring_empty (fd_ring))
+    return;
+
+  while (true)
+    {
+      int fd = fd_ring->fts_fd_ring[i];
+      if (fd < 0)
+        fprintf (stream, "%d: %d:\n", i, fd);
+      else
+        {
+          char *wd = getcwdat (fd, NULL, 0);
+          fprintf (stream, "%d: %d: %s\n", i, fd, wd);
+          free (wd);
+        }
+      if (i == fd_ring->fts_back)
+        break;
+      i = (i + I_RING_SIZE - 1) % I_RING_SIZE;
+    }
+}
+
+/* Ensure that each file descriptor on the fd_ring matches a
+   parent, grandparent, etc. of the current working directory.  */
+static void
+fd_ring_check (FTS const *sp)
+{
+  if (!fts_debug)
+    return;
+
+  /* Make a writable copy.  */
+  I_ring fd_w = sp->fts_fd_ring;
+
+  int cwd_fd = sp->fts_cwd_fd;
+  cwd_fd = fcntl (cwd_fd, F_DUPFD_CLOEXEC, STDERR_FILENO + 1);
+  char *dot = getcwdat (cwd_fd, NULL, 0);
+  error (0, 0, "===== check ===== cwd: %s", dot);
+  free (dot);
+  while ( ! i_ring_empty (&fd_w))
+    {
+      int fd = i_ring_pop (&fd_w);
+      if (0 <= fd)
+        {
+          int open_flags = O_SEARCH | O_CLOEXEC;
+          int parent_fd = openat (cwd_fd, "..", open_flags);
+          if (parent_fd < 0)
+            {
+              // Warn?
+              break;
+            }
+          if (!same_fd (fd, parent_fd))
+            {
+              char *cwd = getcwdat (fd, NULL, 0);
+              error (0, errno, "ring  : %s", cwd);
+              char *c2 = getcwdat (parent_fd, NULL, 0);
+              error (0, errno, "parent: %s", c2);
+              free (cwd);
+              free (c2);
+              fts_assert (0);
+            }
+          close (cwd_fd);
+          cwd_fd = parent_fd;
+        }
+    }
+  close (cwd_fd);
+}
+#endif
+
+static unsigned short int
+internal_function
+fts_stat(FTS *sp, register FTSENT *p, bool follow)
+{
+        struct stat *sbp = p->fts_statp;
+
+        if (p->fts_level == FTS_ROOTLEVEL && ISSET(FTS_COMFOLLOW))
+                follow = true;
+
+        /*
+         * If doing a logical walk, or application requested FTS_FOLLOW, do
+         * a stat(2).  If that fails, check for a non-existent symlink.  If
+         * fail, set the errno from the stat call.
+         */
+        if (ISSET(FTS_LOGICAL) || follow) {
+                if (stat(p->fts_accpath, sbp)) {
+                        if (errno == ENOENT
+                            && lstat(p->fts_accpath, sbp) == 0) {
+                                __set_errno (0);
+                                return (FTS_SLNONE);
+                        }
+                        p->fts_errno = errno;
+                        goto err;
+                }
+        } else if (fstatat(sp->fts_cwd_fd, p->fts_accpath, sbp,
+                           AT_SYMLINK_NOFOLLOW)) {
+                p->fts_errno = errno;
+err:            memset(sbp, 0, sizeof(struct stat));
+                return (FTS_NS);
+        }
+
+        if (S_ISDIR(sbp->st_mode)) {
+                if (ISDOT(p->fts_name)) {
+                        /* Command-line "." and ".." are real directories. */
+                        return (p->fts_level == FTS_ROOTLEVEL ? FTS_D : FTS_DOT);
+                }
+
+                return (FTS_D);
+        }
+        if (S_ISLNK(sbp->st_mode))
+                return (FTS_SL);
+        if (S_ISREG(sbp->st_mode))
+                return (FTS_F);
+        return (FTS_DEFAULT);
+}
+
+static int
+fts_compar (void const *a, void const *b)
+{
+  /* Convert A and B to the correct types, to pacify the compiler, and
+     for portability to bizarre hosts where "void const *" and "FTSENT
+     const **" differ in runtime representation.  The comparison
+     function cannot modify *a and *b, but there is no compile-time
+     check for this.  */
+  FTSENT const **pa = (FTSENT const **) a;
+  FTSENT const **pb = (FTSENT const **) b;
+  return pa[0]->fts_fts->fts_compar (pa, pb);
+}
+
+static FTSENT *
+internal_function
+fts_sort (FTS *sp, FTSENT *head, register size_t nitems)
+{
+        register FTSENT **ap, *p;
+
+        /* On most modern hosts, void * and FTSENT ** have the same
+           run-time representation, and one can convert sp->fts_compar to
+           the type qsort expects without problem.  Use the heuristic that
+           this is OK if the two pointer types are the same size, and if
+           converting FTSENT ** to long int is the same as converting
+           FTSENT ** to void * and then to long int.  This heuristic isn't
+           valid in general but we don't know of any counterexamples.  */
+        FTSENT *dummy;
+        int (*compare) (void const *, void const *) =
+          ((sizeof &dummy == sizeof (void *)
+            && (long int) &dummy == (long int) (void *) &dummy)
+           ? (int (*) (void const *, void const *)) sp->fts_compar
+           : fts_compar);
+
+        /*
+         * Construct an array of pointers to the structures and call qsort(3).
+         * Reassemble the array in the order returned by qsort.  If unable to
+         * sort for memory reasons, return the directory entries in their
+         * current order.  Allocate enough space for the current needs plus
+         * 40 so don't realloc one entry at a time.
+         */
+        if (nitems > sp->fts_nitems) {
+                FTSENT **a;
+
+                sp->fts_nitems = nitems + 40;
+                if (SIZE_MAX / sizeof *a < sp->fts_nitems
+                    || ! (a = realloc (sp->fts_array,
+                                       sp->fts_nitems * sizeof *a))) {
+                        free(sp->fts_array);
+                        sp->fts_array = NULL;
+                        sp->fts_nitems = 0;
+                        return (head);
+                }
+                sp->fts_array = a;
+        }
+        for (ap = sp->fts_array, p = head; p; p = p->fts_link)
+                *ap++ = p;
+        qsort((void *)sp->fts_array, nitems, sizeof(FTSENT *), compare);
+        for (head = *(ap = sp->fts_array); --nitems; ++ap)
+                ap[0]->fts_link = ap[1];
+        ap[0]->fts_link = NULL;
+        return (head);
+}
+
+static FTSENT *
+internal_function
+fts_alloc (FTS *sp, const char *name, register size_t namelen)
+{
+        register FTSENT *p;
+        size_t len;
+
+        /*
+         * The file name is a variable length array.  Allocate the FTSENT
+         * structure and the file name in one chunk.
+         */
+        len = FLEXSIZEOF(FTSENT, fts_name, namelen + 1);
+        if ((p = malloc(len)) == NULL)
+                return (NULL);
+
+        /* Copy the name and guarantee NUL termination. */
+        memcpy(p->fts_name, name, namelen);
+        p->fts_name[namelen] = '\0';
+
+        p->fts_namelen = namelen;
+        p->fts_fts = sp;
+        p->fts_path = sp->fts_path;
+        p->fts_errno = 0;
+        p->fts_dirp = NULL;
+        p->fts_flags = 0;
+        p->fts_instr = FTS_NOINSTR;
+        p->fts_number = 0;
+        p->fts_pointer = NULL;
+        return (p);
+}
+
+static void
+internal_function
+fts_lfree (register FTSENT *head)
+{
+        register FTSENT *p;
+
+        /* Free a linked list of structures. */
+        while ((p = head)) {
+                head = head->fts_link;
+                if (p->fts_dirp)
+                        closedir (p->fts_dirp);
+                free(p);
+        }
+}
+
+/*
+ * Allow essentially unlimited file name lengths; find, rm, ls should
+ * all work on any tree.  Most systems will allow creation of file
+ * names much longer than MAXPATHLEN, even though the kernel won't
+ * resolve them.  Add the size (not just what's needed) plus 256 bytes
+ * so don't realloc the file name 2 bytes at a time.
+ */
+static bool
+internal_function
+fts_palloc (FTS *sp, size_t more)
+{
+        char *p;
+        size_t new_len = sp->fts_pathlen + more + 256;
+
+        /*
+         * See if fts_pathlen would overflow.
+         */
+        if (new_len < sp->fts_pathlen) {
+                free(sp->fts_path);
+                sp->fts_path = NULL;
+                __set_errno (ENAMETOOLONG);
+                return false;
+        }
+        sp->fts_pathlen = new_len;
+        p = realloc(sp->fts_path, sp->fts_pathlen);
+        if (p == NULL) {
+                free(sp->fts_path);
+                sp->fts_path = NULL;
+                return false;
+        }
+        sp->fts_path = p;
+        return true;
+}
+
+/*
+ * When the file name is realloc'd, have to fix all of the pointers in
+ *  structures already returned.
+ */
+static void
+internal_function
+fts_padjust (FTS *sp, FTSENT *head)
+{
+        FTSENT *p;
+        char *addr = sp->fts_path;
+
+#define ADJUST(p) do {                                                  \
+        if ((p)->fts_accpath != (p)->fts_name) {                        \
+                (p)->fts_accpath =                                      \
+                    (char *)addr + ((p)->fts_accpath - (p)->fts_path);  \
+        }                                                               \
+        (p)->fts_path = addr;                                           \
+} while (0)
+        /* Adjust the current set of children. */
+        for (p = sp->fts_child; p; p = p->fts_link)
+                ADJUST(p);
+
+        /* Adjust the rest of the tree, including the current level. */
+        for (p = head; p->fts_level >= FTS_ROOTLEVEL;) {
+                ADJUST(p);
+                p = p->fts_link ? p->fts_link : p->fts_parent;
+        }
+}
+
+static size_t
+internal_function _GL_ATTRIBUTE_PURE
+fts_maxarglen (char * const *argv)
+{
+        size_t len, max;
+
+        for (max = 0; *argv; ++argv)
+                if ((len = strlen(*argv)) > max)
+                        max = len;
+        return (max + 1);
+}
+
+/*
+ * Change to dir specified by fd or file name without getting
+ * tricked by someone changing the world out from underneath us.
+ * Assumes p->fts_statp->st_dev and p->fts_statp->st_ino are filled in.
+ * If FD is non-negative, expect it to be used after this function returns,
+ * and to be closed eventually.  So don't pass e.g., 'dirfd(dirp)' and then
+ * do closedir(dirp), because that would invalidate the saved FD.
+ * Upon failure, close FD immediately and return nonzero.
+ */
+static int
+internal_function
+fts_safe_changedir (FTS *sp, FTSENT *p, int fd, char const *dir)
+{
+        int ret;
+        bool is_dotdot = dir && STREQ (dir, "..");
+        int newfd;
+
+        /* This clause handles the unusual case in which FTS_NOCHDIR
+           is specified, along with FTS_CWDFD.  In that case, there is
+           no need to change even the virtual cwd file descriptor.
+           However, if FD is non-negative, we do close it here.  */
+        if (ISSET (FTS_NOCHDIR))
+          {
+            if (ISSET (FTS_CWDFD) && 0 <= fd)
+              close (fd);
+            return 0;
+          }
+
+        if (fd < 0 && is_dotdot && ISSET (FTS_CWDFD))
+          {
+            /* When possible, skip the diropen and subsequent fstat+dev/ino
+               comparison.  I.e., when changing to parent directory
+               (chdir ("..")), use a file descriptor from the ring and
+               save the overhead of diropen+fstat, as well as avoiding
+               failure when we lack "x" access to the virtual cwd.  */
+            if ( ! i_ring_empty (&sp->fts_fd_ring))
+              {
+                int parent_fd;
+                fd_ring_print (sp, stderr, "pre-pop");
+                parent_fd = i_ring_pop (&sp->fts_fd_ring);
+                if (0 <= parent_fd)
+                  {
+                    fd = parent_fd;
+                    dir = NULL;
+                  }
+              }
+          }
+
+        newfd = fd;
+        if (fd < 0 && (newfd = diropen (sp, dir)) < 0)
+          return -1;
+
+        /* The following dev/inode check is necessary if we're doing a
+           "logical" traversal (through symlinks, a la chown -L), if the
+           system lacks O_NOFOLLOW support, or if we're changing to ".."
+           (but not via a popped file descriptor).  When changing to the
+           name "..", O_NOFOLLOW can't help.  In general, when the target is
+           not "..", diropen's use of O_NOFOLLOW ensures we don't mistakenly
+           follow a symlink, so we can avoid the expense of this fstat.  */
+        if (ISSET(FTS_LOGICAL) || ! HAVE_WORKING_O_NOFOLLOW
+            || (dir && STREQ (dir, "..")))
+          {
+            struct stat sb;
+            if (fstat(newfd, &sb))
+              {
+                ret = -1;
+                goto bail;
+              }
+            if (p->fts_statp->st_dev != sb.st_dev
+                || p->fts_statp->st_ino != sb.st_ino)
+              {
+                __set_errno (ENOENT);           /* disinformation */
+                ret = -1;
+                goto bail;
+              }
+          }
+
+        if (ISSET(FTS_CWDFD))
+          {
+            cwd_advance_fd (sp, newfd, ! is_dotdot);
+            return 0;
+          }
+
+        ret = fchdir(newfd);
+bail:
+        if (fd < 0)
+          {
+            int oerrno = errno;
+            (void)close(newfd);
+            __set_errno (oerrno);
+          }
+        return ret;
+}
diff --git a/src/grep/lib/fts_.h b/src/grep/lib/fts_.h
new file mode 100644
index 0000000..13cfa30
--- /dev/null
+++ b/src/grep/lib/fts_.h
@@ -0,0 +1,271 @@
+/* Traverse a file hierarchy.
+
+   Copyright (C) 2004-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/*
+ * Copyright (c) 1989, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *      @(#)fts.h       8.3 (Berkeley) 8/14/94
+ */
+
+#ifndef _FTS_H
+# define _FTS_H 1
+
+# ifdef _LIBC
+#  include <features.h>
+#  if __STDC_VERSION__ < 199901L
+#   define __FLEXIBLE_ARRAY_MEMBER 1
+#  else
+#   define __FLEXIBLE_ARRAY_MEMBER
+#  endif
+# else
+#  define __FLEXIBLE_ARRAY_MEMBER FLEXIBLE_ARRAY_MEMBER
+#  undef __THROW
+#  define __THROW
+#  undef __BEGIN_DECLS
+#  undef __END_DECLS
+#  ifdef __cplusplus
+#   define __BEGIN_DECLS extern "C" {
+#   define __END_DECLS }
+#  else
+#   define __BEGIN_DECLS
+#   define __END_DECLS
+#  endif
+# endif
+
+# include <stddef.h>
+# include <sys/types.h>
+# include <dirent.h>
+# include <sys/stat.h>
+# include "i-ring.h"
+
+typedef struct {
+        struct _ftsent *fts_cur;        /* current node */
+        struct _ftsent *fts_child;      /* linked list of children */
+        struct _ftsent **fts_array;     /* sort array */
+        dev_t fts_dev;                  /* starting device # */
+        char *fts_path;                 /* file name for this descent */
+        int fts_rfd;                    /* fd for root */
+        int fts_cwd_fd;                 /* the file descriptor on which the
+                                           virtual cwd is open, or AT_FDCWD */
+        size_t fts_pathlen;             /* sizeof(path) */
+        size_t fts_nitems;              /* elements in the sort array */
+        int (*fts_compar) (struct _ftsent const **, struct _ftsent const **);
+                                        /* compare fn */
+
+# define FTS_COMFOLLOW  0x0001          /* follow command line symlinks */
+# define FTS_LOGICAL    0x0002          /* logical walk */
+# define FTS_NOCHDIR    0x0004          /* don't change directories */
+# define FTS_NOSTAT     0x0008          /* don't get stat info */
+# define FTS_PHYSICAL   0x0010          /* physical walk */
+# define FTS_SEEDOT     0x0020          /* return dot and dot-dot */
+# define FTS_XDEV       0x0040          /* don't cross devices */
+# define FTS_WHITEOUT   0x0080          /* return whiteout information */
+
+  /* There are two ways to detect cycles.
+     The lazy way (which works only with FTS_PHYSICAL),
+     with which one may process a directory that is a
+     part of the cycle several times before detecting the cycle.
+     The "tight" way, whereby fts uses more memory (proportional
+     to number of "active" directories, aka distance from root
+     of current tree to current directory -- see active_dir_ht)
+     to detect any cycle right away.  For example, du must use
+     this option to avoid counting disk space in a cycle multiple
+     times, but chown -R need not.
+     The default is to use the constant-memory lazy way, when possible
+     (see below).
+
+     However, with FTS_LOGICAL (when following symlinks, e.g., chown -L)
+     using lazy cycle detection is inadequate.  For example, traversing
+     a directory containing a symbolic link to a peer directory, it is
+     possible to encounter the same directory twice even though there
+     is no cycle:
+     dir
+     ...
+     slink -> dir
+     So, when FTS_LOGICAL is selected, we have to use a different
+     mode of cycle detection: FTS_TIGHT_CYCLE_CHECK.  */
+# define FTS_TIGHT_CYCLE_CHECK  0x0100
+
+  /* Use this flag to enable semantics with which the parent
+     application may be made both more efficient and more robust.
+     Whereas the default is to visit each directory in a recursive
+     traversal (via chdir), using this flag makes it so the initial
+     working directory is never changed.  Instead, these functions
+     perform the traversal via a virtual working directory, maintained
+     through the file descriptor member, fts_cwd_fd.  */
+# define FTS_CWDFD              0x0200
+
+  /* Historically, for each directory that fts initially encounters, it would
+     open it, read all entries, and stat each entry, storing the results, and
+     then it would process the first entry.  But that behavior is bad for
+     locality of reference, and also causes trouble with inode-simulating
+     file systems like FAT, CIFS, FUSE-based ones, etc., when entries from
+     their name/inode cache are flushed too early.
+     Use this flag to make fts_open and fts_read defer the stat/lstat/fststat
+     of each entry until it is actually processed.  However, note that if you
+     use this option and also specify a comparison function, that function may
+     not examine any data via fts_statp.  However, when fts_statp->st_mode is
+     nonzero, the S_IFMT type bits are valid, with mapped dirent.d_type data.
+     Of course, that happens only on file systems that provide useful
+     dirent.d_type data.  */
+# define FTS_DEFER_STAT         0x0400
+
+  /* Use this flag to disable stripping of trailing slashes
+     from input path names during fts_open initialization.  */
+# define FTS_VERBATIM   0x0800
+
+# define FTS_OPTIONMASK 0x0fff          /* valid user option mask */
+
+# define FTS_NAMEONLY   0x1000          /* (private) child names only */
+# define FTS_STOP       0x2000          /* (private) unrecoverable error */
+        int fts_options;                /* fts_open options, global flags */
+
+        /* Map a directory's device number to a boolean.  The boolean is
+           true if for that file system (type determined by a single fstatfs
+           call per FS) st_nlink can be used to calculate the number of
+           sub-directory entries in a directory.
+           Using this table is an optimization that permits us to look up
+           file system type on a per-inode basis at the minimal cost of
+           calling fstatfs only once per traversed device.  */
+        struct hash_table *fts_leaf_optimization_works_ht;
+
+        union {
+                /* This data structure is used if FTS_TIGHT_CYCLE_CHECK is
+                   specified.  It records the directories between a starting
+                   point and the current directory.  I.e., a directory is
+                   recorded here IFF we have visited it once, but we have not
+                   yet completed processing of all its entries.  Every time we
+                   visit a new directory, we add that directory to this set.
+                   When we finish with a directory (usually by visiting it a
+                   second time), we remove it from this set.  Each entry in
+                   this data structure is a device/inode pair.  This data
+                   structure is used to detect directory cycles efficiently and
+                   promptly even when the depth of a hierarchy is in the tens
+                   of thousands.  */
+                struct hash_table *ht;
+
+                /* FIXME: rename these two members to have the fts_ prefix */
+                /* This data structure uses a lazy cycle-detection algorithm,
+                   as done by rm via cycle-check.c.  It's the default,
+                   but it's not appropriate for programs like du.  */
+                struct cycle_check_state *state;
+        } fts_cycle;
+
+        /* A stack of the file descriptors corresponding to the
+           most-recently traversed parent directories.
+           Currently used only in FTS_CWDFD mode.  */
+        I_ring fts_fd_ring;
+} FTS;
+
+typedef struct _ftsent {
+        struct _ftsent *fts_cycle;      /* cycle node */
+        struct _ftsent *fts_parent;     /* parent directory */
+        struct _ftsent *fts_link;       /* next file in directory */
+        DIR *fts_dirp;                  /* Dir pointer for any directory
+                                           containing more entries than we
+                                           read at one time.  */
+        long fts_number;                /* local numeric value */
+        void *fts_pointer;              /* local address value */
+        char *fts_accpath;              /* access file name */
+        char *fts_path;                 /* root name; == fts_fts->fts_path */
+        int fts_errno;                  /* errno for this node */
+        int fts_symfd;                  /* fd for symlink */
+        size_t fts_pathlen;             /* strlen(fts_path) */
+
+        FTS *fts_fts;                   /* the file hierarchy itself */
+
+# define FTS_ROOTPARENTLEVEL    (-1)
+# define FTS_ROOTLEVEL           0
+        ptrdiff_t fts_level;            /* depth (-1 to N) */
+
+        size_t fts_namelen;             /* strlen(fts_name) */
+
+# define FTS_D           1              /* preorder directory */
+# define FTS_DC          2              /* directory that causes cycles */
+# define FTS_DEFAULT     3              /* none of the above */
+# define FTS_DNR         4              /* unreadable directory */
+# define FTS_DOT         5              /* dot or dot-dot */
+# define FTS_DP          6              /* postorder directory */
+# define FTS_ERR         7              /* error; errno is set */
+# define FTS_F           8              /* regular file */
+# define FTS_INIT        9              /* initialized only */
+# define FTS_NS         10              /* stat(2) failed */
+# define FTS_NSOK       11              /* no stat(2) requested */
+# define FTS_SL         12              /* symbolic link */
+# define FTS_SLNONE     13              /* symbolic link without target */
+# define FTS_W          14              /* whiteout object */
+        unsigned short int fts_info;    /* user flags for FTSENT structure */
+
+# define FTS_DONTCHDIR   0x01           /* don't chdir .. to the parent */
+# define FTS_SYMFOLLOW   0x02           /* followed a symlink to get here */
+        unsigned short int fts_flags;   /* private flags for FTSENT structure */
+
+# define FTS_AGAIN       1              /* read node again */
+# define FTS_FOLLOW      2              /* follow symbolic link */
+# define FTS_NOINSTR     3              /* no instructions */
+# define FTS_SKIP        4              /* discard node */
+        unsigned short int fts_instr;   /* fts_set() instructions */
+
+        struct stat fts_statp[1];       /* stat(2) information */
+        char fts_name[__FLEXIBLE_ARRAY_MEMBER]; /* file name */
+} FTSENT;
+
+__BEGIN_DECLS
+
+ _GL_ATTRIBUTE_NODISCARD
+FTSENT  *fts_children (FTS *, int) __THROW;
+
+_GL_ATTRIBUTE_NODISCARD
+int      fts_close (FTS *) __THROW;
+
+_GL_ATTRIBUTE_NODISCARD
+FTS     *fts_open (char * const *, int,
+                   int (*)(const FTSENT **, const FTSENT **))
+  _GL_ATTRIBUTE_DEALLOC (fts_close, 1) __THROW;
+
+_GL_ATTRIBUTE_NODISCARD
+FTSENT  *fts_read (FTS *) __THROW;
+
+int      fts_set (FTS *, FTSENT *, int) __THROW;
+__END_DECLS
+
+#endif /* fts.h */
diff --git a/src/grep/lib/getcwd-lgpl.c b/src/grep/lib/getcwd-lgpl.c
new file mode 100644
index 0000000..a9dd848
--- /dev/null
+++ b/src/grep/lib/getcwd-lgpl.c
@@ -0,0 +1,127 @@
+/* Copyright (C) 2011-2021 Free Software Foundation, Inc.
+   This file is part of gnulib.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification */
+#include <unistd.h>
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if GNULIB_GETCWD
+/* Favor GPL getcwd.c if both getcwd and getcwd-lgpl modules are in use.  */
+typedef int dummy;
+#else
+
+/* Get the name of the current working directory, and put it in SIZE
+   bytes of BUF.  Returns NULL if the directory couldn't be determined
+   (perhaps because the absolute name was longer than PATH_MAX, or
+   because of missing read/search permissions on parent directories)
+   or SIZE was too small.  If successful, returns BUF.  If BUF is
+   NULL, an array is allocated with 'malloc'; the array is SIZE bytes
+   long, unless SIZE == 0, in which case it is as big as
+   necessary.  */
+
+# undef getcwd
+# if defined _WIN32 && !defined __CYGWIN__
+#  define getcwd _getcwd
+# endif
+
+char *
+rpl_getcwd (char *buf, size_t size)
+{
+  char *ptr;
+  char *result;
+
+  /* Handle single size operations.  */
+  if (buf)
+    {
+      if (!size)
+        {
+          errno = EINVAL;
+          return NULL;
+        }
+      return getcwd (buf, size);
+    }
+
+  if (size)
+    {
+      buf = malloc (size);
+      if (!buf)
+        {
+          errno = ENOMEM;
+          return NULL;
+        }
+      result = getcwd (buf, size);
+      if (!result)
+        free (buf);
+      return result;
+    }
+
+  /* Flexible sizing requested.  Avoid over-allocation for the common
+     case of a name that fits within a 4k page, minus some space for
+     local variables, to be sure we don't skip over a guard page.  */
+  {
+    char tmp[4032];
+    size = sizeof tmp;
+    ptr = getcwd (tmp, size);
+    if (ptr)
+      {
+        result = strdup (ptr);
+        if (!result)
+          errno = ENOMEM;
+        return result;
+      }
+    if (errno != ERANGE)
+      return NULL;
+  }
+
+  /* My what a large directory name we have.  */
+  do
+    {
+      size <<= 1;
+      ptr = realloc (buf, size);
+      if (ptr == NULL)
+        {
+          free (buf);
+          errno = ENOMEM;
+          return NULL;
+        }
+      buf = ptr;
+      result = getcwd (buf, size);
+    }
+  while (!result && errno == ERANGE);
+
+  if (!result)
+    free (buf);
+  else
+    {
+      /* Here result == buf.  */
+      /* Shrink result before returning it.  */
+      size_t actual_size = strlen (result) + 1;
+      if (actual_size < size)
+        {
+          char *shrinked_result = realloc (result, actual_size);
+          if (shrinked_result != NULL)
+            result = shrinked_result;
+        }
+    }
+  return result;
+}
+
+#endif
diff --git a/src/grep/lib/getdtablesize.c b/src/grep/lib/getdtablesize.c
new file mode 100644
index 0000000..5006c2d
--- /dev/null
+++ b/src/grep/lib/getdtablesize.c
@@ -0,0 +1,124 @@
+/* getdtablesize() function: Return maximum possible file descriptor value + 1.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2008.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+
+# include <stdio.h>
+
+# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+#  include "msvc-inval.h"
+# endif
+
+# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+static int
+_setmaxstdio_nothrow (int newmax)
+{
+  int result;
+
+  TRY_MSVC_INVAL
+    {
+      result = _setmaxstdio (newmax);
+    }
+  CATCH_MSVC_INVAL
+    {
+      result = -1;
+    }
+  DONE_MSVC_INVAL;
+
+  return result;
+}
+# else
+#  define _setmaxstdio_nothrow _setmaxstdio
+# endif
+
+/* Cache for the previous getdtablesize () result.  Safe to cache because
+   Windows also lacks setrlimit.  */
+static int dtablesize;
+
+int
+getdtablesize (void)
+{
+  if (dtablesize == 0)
+    {
+      /* We are looking for the number N such that the valid file descriptors
+         are 0..N-1.  It can be obtained through a loop as follows:
+           {
+             int fd;
+             for (fd = 3; fd < 65536; fd++)
+               if (dup2 (0, fd) == -1)
+                 break;
+             return fd;
+           }
+         On Windows XP, the result is 2048.
+         The drawback of this loop is that it allocates memory for a libc
+         internal array that is never freed.
+
+         The number N can also be obtained as the upper bound for
+         _getmaxstdio ().  _getmaxstdio () returns the maximum number of open
+         FILE objects.  The sanity check in _setmaxstdio reveals the maximum
+         number of file descriptors.  This too allocates memory, but it is
+         freed when we call _setmaxstdio with the original value.  */
+      int orig_max_stdio = _getmaxstdio ();
+      unsigned int bound;
+      for (bound = 0x10000; _setmaxstdio_nothrow (bound) < 0; bound = bound / 2)
+        ;
+      _setmaxstdio_nothrow (orig_max_stdio);
+      dtablesize = bound;
+    }
+  return dtablesize;
+}
+
+#else
+
+# include <limits.h>
+# include <sys/resource.h>
+
+# ifndef RLIM_SAVED_CUR
+#  define RLIM_SAVED_CUR RLIM_INFINITY
+# endif
+# ifndef RLIM_SAVED_MAX
+#  define RLIM_SAVED_MAX RLIM_INFINITY
+# endif
+
+# ifdef __CYGWIN__
+  /* Cygwin 1.7.25 auto-increases the RLIMIT_NOFILE soft limit until it
+     hits the compile-time constant hard limit of 3200.  We might as
+     well just report the hard limit.  */
+#  define rlim_cur rlim_max
+# endif
+
+int
+getdtablesize (void)
+{
+  struct rlimit lim;
+
+  if (getrlimit (RLIMIT_NOFILE, &lim) == 0
+      && 0 <= lim.rlim_cur && lim.rlim_cur <= INT_MAX
+      && lim.rlim_cur != RLIM_INFINITY
+      && lim.rlim_cur != RLIM_SAVED_CUR
+      && lim.rlim_cur != RLIM_SAVED_MAX)
+    return lim.rlim_cur;
+
+  return INT_MAX;
+}
+
+#endif
diff --git a/src/grep/lib/getopt-cdefs.in.h b/src/grep/lib/getopt-cdefs.in.h
new file mode 100644
index 0000000..33e3d4b
--- /dev/null
+++ b/src/grep/lib/getopt-cdefs.in.h
@@ -0,0 +1,66 @@
+/* getopt-on-non-glibc compatibility macros.
+   Copyright (C) 1989-2021 Free Software Foundation, Inc.
+   This file is part of gnulib.
+   Unlike most of the getopt implementation, it is NOT shared
+   with the GNU C Library.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GETOPT_CDEFS_H
+#define _GETOPT_CDEFS_H 1
+
+/* This header should not be used directly; include getopt.h or
+   unistd.h instead.  It does not have a protective #error, because
+   the guard macro for getopt.h in gnulib is not fixed.  */
+
+/* getopt-core.h and getopt-ext.h are shared with GNU libc, and expect
+   a number of the internal macros supplied to GNU libc's headers by
+   sys/cdefs.h.  Provide fallback definitions for all of them.  */
+#if @HAVE_SYS_CDEFS_H@
+# include <sys/cdefs.h>
+#endif
+
+#ifndef __BEGIN_DECLS
+# ifdef __cplusplus
+#  define __BEGIN_DECLS extern "C" {
+# else
+#  define __BEGIN_DECLS /* nothing */
+# endif
+#endif
+#ifndef __END_DECLS
+# ifdef __cplusplus
+#  define __END_DECLS }
+# else
+#  define __END_DECLS /* nothing */
+# endif
+#endif
+
+#ifndef __GNUC_PREREQ
+# if defined __GNUC__ && defined __GNUC_VERSION__
+# define __GNUC_PREREQ(maj, min) \
+        ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
+# else
+#  define __GNUC_PREREQ(maj, min) 0
+# endif
+#endif
+
+#ifndef __THROW
+# if defined __cplusplus && (__GNUC_PREREQ (2,8) || __clang_major__ >= 4)
+#  define __THROW       throw ()
+# else
+#  define __THROW
+# endif
+#endif
+
+#endif /* _GETOPT_CDEFS_H */
diff --git a/src/grep/lib/getopt-core.h b/src/grep/lib/getopt-core.h
new file mode 100644
index 0000000..ceb14d0
--- /dev/null
+++ b/src/grep/lib/getopt-core.h
@@ -0,0 +1,96 @@
+/* Declarations for getopt (basic, portable features only).
+   Copyright (C) 1989-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library and is also part of gnulib.
+   Patches to this file should be submitted to both projects.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GETOPT_CORE_H
+#define _GETOPT_CORE_H 1
+
+/* This header should not be used directly; include getopt.h or
+   unistd.h instead.  Unlike most bits headers, it does not have
+   a protective #error, because the guard macro for getopt.h in
+   gnulib is not fixed.  */
+
+__BEGIN_DECLS
+
+/* For communication from 'getopt' to the caller.
+   When 'getopt' finds an option that takes an argument,
+   the argument value is returned here.
+   Also, when 'ordering' is RETURN_IN_ORDER,
+   each non-option ARGV-element is returned here.  */
+
+extern char *optarg;
+
+/* Index in ARGV of the next element to be scanned.
+   This is used for communication to and from the caller
+   and for communication between successive calls to 'getopt'.
+
+   On entry to 'getopt', zero means this is the first call; initialize.
+
+   When 'getopt' returns -1, this is the index of the first of the
+   non-option elements that the caller should itself scan.
+
+   Otherwise, 'optind' communicates from one call to the next
+   how much of ARGV has been scanned so far.  */
+
+extern int optind;
+
+/* Callers store zero here to inhibit the error message 'getopt' prints
+   for unrecognized options.  */
+
+extern int opterr;
+
+/* Set to an option character which was unrecognized.  */
+
+extern int optopt;
+
+/* Get definitions and prototypes for functions to process the
+   arguments in ARGV (ARGC of them, minus the program name) for
+   options given in OPTS.
+
+   Return the option character from OPTS just read.  Return -1 when
+   there are no more options.  For unrecognized options, or options
+   missing arguments, 'optopt' is set to the option letter, and '?' is
+   returned.
+
+   The OPTS string is a list of characters which are recognized option
+   letters, optionally followed by colons, specifying that that letter
+   takes an argument, to be placed in 'optarg'.
+
+   If a letter in OPTS is followed by two colons, its argument is
+   optional.  This behavior is specific to the GNU 'getopt'.
+
+   The argument '--' causes premature termination of argument
+   scanning, explicitly telling 'getopt' that there are no more
+   options.
+
+   If OPTS begins with '-', then non-option arguments are treated as
+   arguments to the option '\1'.  This behavior is specific to the GNU
+   'getopt'.  If OPTS begins with '+', or POSIXLY_CORRECT is set in
+   the environment, then do not permute arguments.
+
+   For standards compliance, the 'argv' argument has the type
+   char *const *, but this is inaccurate; if argument permutation is
+   enabled, the argv array (not the strings it points to) must be
+   writable.  */
+
+extern int getopt (int ___argc, char *const *___argv, const char *__shortopts)
+       __THROW _GL_ARG_NONNULL ((2, 3));
+
+__END_DECLS
+
+#endif /* _GETOPT_CORE_H */
diff --git a/src/grep/lib/getopt-ext.h b/src/grep/lib/getopt-ext.h
new file mode 100644
index 0000000..f82a8c6
--- /dev/null
+++ b/src/grep/lib/getopt-ext.h
@@ -0,0 +1,77 @@
+/* Declarations for getopt (GNU extensions).
+   Copyright (C) 1989-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library and is also part of gnulib.
+   Patches to this file should be submitted to both projects.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GETOPT_EXT_H
+#define _GETOPT_EXT_H 1
+
+/* This header should not be used directly; include getopt.h instead.
+   Unlike most bits headers, it does not have a protective #error,
+   because the guard macro for getopt.h in gnulib is not fixed.  */
+
+__BEGIN_DECLS
+
+/* Describe the long-named options requested by the application.
+   The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
+   of 'struct option' terminated by an element containing a name which is
+   zero.
+
+   The field 'has_arg' is:
+   no_argument		(or 0) if the option does not take an argument,
+   required_argument	(or 1) if the option requires an argument,
+   optional_argument 	(or 2) if the option takes an optional argument.
+
+   If the field 'flag' is not NULL, it points to a variable that is set
+   to the value given in the field 'val' when the option is found, but
+   left unchanged if the option is not found.
+
+   To have a long-named option do something other than set an 'int' to
+   a compiled-in constant, such as set a value from 'optarg', set the
+   option's 'flag' field to zero and its 'val' field to a nonzero
+   value (the equivalent single-letter option character, if there is
+   one).  For long options that have a zero 'flag' field, 'getopt'
+   returns the contents of the 'val' field.  */
+
+struct option
+{
+  const char *name;
+  /* has_arg can't be an enum because some compilers complain about
+     type mismatches in all the code that assumes it is an int.  */
+  int has_arg;
+  int *flag;
+  int val;
+};
+
+/* Names for the values of the 'has_arg' field of 'struct option'.  */
+
+#define no_argument		0
+#define required_argument	1
+#define optional_argument	2
+
+extern int getopt_long (int ___argc, char *__getopt_argv_const *___argv,
+			const char *__shortopts,
+		        const struct option *__longopts, int *__longind)
+       __THROW _GL_ARG_NONNULL ((2, 3));
+extern int getopt_long_only (int ___argc, char *__getopt_argv_const *___argv,
+			     const char *__shortopts,
+		             const struct option *__longopts, int *__longind)
+       __THROW _GL_ARG_NONNULL ((2, 3));
+
+__END_DECLS
+
+#endif /* _GETOPT_EXT_H */
diff --git a/src/grep/lib/getopt-pfx-core.h b/src/grep/lib/getopt-pfx-core.h
new file mode 100644
index 0000000..b1733a3
--- /dev/null
+++ b/src/grep/lib/getopt-pfx-core.h
@@ -0,0 +1,66 @@
+/* getopt (basic, portable features) gnulib wrapper header.
+   Copyright (C) 1989-2021 Free Software Foundation, Inc.
+   This file is part of gnulib.
+   Unlike most of the getopt implementation, it is NOT shared
+   with the GNU C Library.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GETOPT_PFX_CORE_H
+#define _GETOPT_PFX_CORE_H 1
+
+/* This header should not be used directly; include getopt.h or
+   unistd.h instead.  It does not have a protective #error, because
+   the guard macro for getopt.h in gnulib is not fixed.  */
+
+/* Standalone applications should #define __GETOPT_PREFIX to an
+   identifier that prefixes the external functions and variables
+   defined in getopt-core.h and getopt-ext.h.  Systematically
+   rename identifiers so that they do not collide with the system
+   functions and variables.  Renaming avoids problems with some
+   compilers and linkers.  */
+#ifdef __GETOPT_PREFIX
+# ifndef __GETOPT_ID
+#  define __GETOPT_CONCAT(x, y) x ## y
+#  define __GETOPT_XCONCAT(x, y) __GETOPT_CONCAT (x, y)
+#  define __GETOPT_ID(y) __GETOPT_XCONCAT (__GETOPT_PREFIX, y)
+# endif
+# undef getopt
+# undef optarg
+# undef opterr
+# undef optind
+# undef optopt
+# define getopt __GETOPT_ID (getopt)
+# define optarg __GETOPT_ID (optarg)
+# define opterr __GETOPT_ID (opterr)
+# define optind __GETOPT_ID (optind)
+# define optopt __GETOPT_ID (optopt)
+
+/* Work around a a problem on macOS, which declares getopt with a
+   trailing __DARWIN_ALIAS(getopt) that would expand to something like
+   __asm("_" "rpl_getopt" "$UNIX2003") were it not for the following
+   hack to suppress the macOS declaration <https://bugs.gnu.org/40205>.  */
+# ifdef __APPLE__
+#  define _GETOPT
+# endif
+
+/* The system's getopt.h may have already included getopt-core.h to
+   declare the unprefixed identifiers.  Undef _GETOPT_CORE_H so that
+   getopt-core.h declares them with prefixes.  */
+# undef _GETOPT_CORE_H
+#endif
+
+#include <getopt-core.h>
+
+#endif /* _GETOPT_PFX_CORE_H */
diff --git a/src/grep/lib/getopt-pfx-ext.h b/src/grep/lib/getopt-pfx-ext.h
new file mode 100644
index 0000000..b9a14ba
--- /dev/null
+++ b/src/grep/lib/getopt-pfx-ext.h
@@ -0,0 +1,70 @@
+/* getopt (GNU extensions) gnulib wrapper header.
+   Copyright (C) 1989-2021 Free Software Foundation, Inc.
+   This file is part of gnulib.
+   Unlike most of the getopt implementation, it is NOT shared
+   with the GNU C Library.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GETOPT_PFX_EXT_H
+#define _GETOPT_PFX_EXT_H 1
+
+/* This header should not be used directly; include getopt.h instead.
+   It does not have a protective #error, because the guard macro for
+   getopt.h in gnulib is not fixed.  */
+
+/* Standalone applications should #define __GETOPT_PREFIX to an
+   identifier that prefixes the external functions and variables
+   defined in getopt-core.h and getopt-ext.h.  Systematically
+   rename identifiers so that they do not collide with the system
+   functions and variables.  Renaming avoids problems with some
+   compilers and linkers.  */
+#ifdef __GETOPT_PREFIX
+# ifndef __GETOPT_ID
+#  define __GETOPT_CONCAT(x, y) x ## y
+#  define __GETOPT_XCONCAT(x, y) __GETOPT_CONCAT (x, y)
+#  define __GETOPT_ID(y) __GETOPT_XCONCAT (__GETOPT_PREFIX, y)
+# endif
+# undef getopt_long
+# undef getopt_long_only
+# undef option
+# undef _getopt_internal
+# define getopt_long __GETOPT_ID (getopt_long)
+# define getopt_long_only __GETOPT_ID (getopt_long_only)
+# define option __GETOPT_ID (option)
+# define _getopt_internal __GETOPT_ID (getopt_internal)
+
+/* The system's getopt.h may have already included getopt-ext.h to
+   declare the unprefixed identifiers.  Undef _GETOPT_EXT_H so that
+   getopt-ext.h declares them with prefixes.  */
+# undef _GETOPT_EXT_H
+#endif
+
+/* Standalone applications get correct prototypes for getopt_long and
+   getopt_long_only; they declare "char **argv".  For backward
+   compatibility with old applications, if __GETOPT_PREFIX is not
+   defined, we supply GNU-libc-compatible, but incorrect, prototypes
+   using "char *const *argv".  (GNU libc is stuck with the incorrect
+   prototypes, as they are baked into older versions of LSB.)  */
+#ifndef __getopt_argv_const
+# if defined __GETOPT_PREFIX
+#  define __getopt_argv_const /* empty */
+# else
+#  define __getopt_argv_const const
+# endif
+#endif
+
+#include <getopt-ext.h>
+
+#endif /* _GETOPT_PFX_EXT_H */
diff --git a/src/grep/lib/getopt.c b/src/grep/lib/getopt.c
new file mode 100644
index 0000000..b106989
--- /dev/null
+++ b/src/grep/lib/getopt.c
@@ -0,0 +1,811 @@
+/* Getopt for GNU.
+   Copyright (C) 1987-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library and is also part of gnulib.
+   Patches to this file should be submitted to both projects.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _LIBC
+# include <config.h>
+#endif
+
+#include "getopt.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifdef _LIBC
+/* When used as part of glibc, error printing must be done differently
+   for standards compliance.  getopt is not a cancellation point, so
+   it must not call functions that are, and it is specified by an
+   older standard than stdio locking, so it must not refer to
+   functions in the "user namespace" related to stdio locking.
+   Finally, it must use glibc's internal message translation so that
+   the messages are looked up in the proper text domain.  */
+# include <libintl.h>
+# define fprintf __fxprintf_nocancel
+# define flockfile(fp) _IO_flockfile (fp)
+# define funlockfile(fp) _IO_funlockfile (fp)
+#else
+# include "gettext.h"
+# define _(msgid) gettext (msgid)
+/* When used standalone, flockfile and funlockfile might not be
+   available.  */
+# if (!defined _POSIX_THREAD_SAFE_FUNCTIONS \
+      || (defined _WIN32 && ! defined __CYGWIN__))
+#  define flockfile(fp) /* nop */
+#  define funlockfile(fp) /* nop */
+# endif
+/* When used standalone, do not attempt to use alloca.  */
+# define __libc_use_alloca(size) 0
+# undef alloca
+# define alloca(size) (abort (), (void *)0)
+#endif
+
+/* This implementation of 'getopt' has three modes for handling
+   options interspersed with non-option arguments.  It can stop
+   scanning for options at the first non-option argument encountered,
+   as POSIX specifies.  It can continue scanning for options after the
+   first non-option argument, but permute 'argv' as it goes so that,
+   after 'getopt' is done, all the options precede all the non-option
+   arguments and 'optind' points to the first non-option argument.
+   Or, it can report non-option arguments as if they were arguments to
+   the option character '\x01'.
+
+   The default behavior of 'getopt_long' is to permute the argument list.
+   When this implementation is used standalone, the default behavior of
+   'getopt' is to stop at the first non-option argument, but when it is
+   used as part of GNU libc it also permutes the argument list.  In both
+   cases, setting the environment variable POSIXLY_CORRECT to any value
+   disables permutation.
+
+   If the first character of the OPTSTRING argument to 'getopt' or
+   'getopt_long' is '+', both functions will stop at the first
+   non-option argument.  If it is '-', both functions will report
+   non-option arguments as arguments to the option character '\x01'.  */
+
+#include "getopt_int.h"
+
+/* For communication from 'getopt' to the caller.
+   When 'getopt' finds an option that takes an argument,
+   the argument value is returned here.
+   Also, when 'ordering' is RETURN_IN_ORDER,
+   each non-option ARGV-element is returned here.  */
+
+char *optarg;
+
+/* Index in ARGV of the next element to be scanned.
+   This is used for communication to and from the caller
+   and for communication between successive calls to 'getopt'.
+
+   On entry to 'getopt', zero means this is the first call; initialize.
+
+   When 'getopt' returns -1, this is the index of the first of the
+   non-option elements that the caller should itself scan.
+
+   Otherwise, 'optind' communicates from one call to the next
+   how much of ARGV has been scanned so far.  */
+
+/* 1003.2 says this must be 1 before any call.  */
+int optind = 1;
+
+/* Callers store zero here to inhibit the error message
+   for unrecognized options.  */
+
+int opterr = 1;
+
+/* Set to an option character which was unrecognized.
+   This must be initialized on some systems to avoid linking in the
+   system's own getopt implementation.  */
+
+int optopt = '?';
+
+/* Keep a global copy of all internal members of getopt_data.  */
+
+static struct _getopt_data getopt_data;
+
+/* Exchange two adjacent subsequences of ARGV.
+   One subsequence is elements [first_nonopt,last_nonopt)
+   which contains all the non-options that have been skipped so far.
+   The other is elements [last_nonopt,optind), which contains all
+   the options processed since those non-options were skipped.
+
+   'first_nonopt' and 'last_nonopt' are relocated so that they describe
+   the new indices of the non-options in ARGV after they are moved.  */
+
+static void
+exchange (char **argv, struct _getopt_data *d)
+{
+  int bottom = d->__first_nonopt;
+  int middle = d->__last_nonopt;
+  int top = d->optind;
+  char *tem;
+
+  /* Exchange the shorter segment with the far end of the longer segment.
+     That puts the shorter segment into the right place.
+     It leaves the longer segment in the right place overall,
+     but it consists of two parts that need to be swapped next.  */
+
+  while (top > middle && middle > bottom)
+    {
+      if (top - middle > middle - bottom)
+	{
+	  /* Bottom segment is the short one.  */
+	  int len = middle - bottom;
+	  int i;
+
+	  /* Swap it with the top part of the top segment.  */
+	  for (i = 0; i < len; i++)
+	    {
+	      tem = argv[bottom + i];
+	      argv[bottom + i] = argv[top - (middle - bottom) + i];
+	      argv[top - (middle - bottom) + i] = tem;
+	    }
+	  /* Exclude the moved bottom segment from further swapping.  */
+	  top -= len;
+	}
+      else
+	{
+	  /* Top segment is the short one.  */
+	  int len = top - middle;
+	  int i;
+
+	  /* Swap it with the bottom part of the bottom segment.  */
+	  for (i = 0; i < len; i++)
+	    {
+	      tem = argv[bottom + i];
+	      argv[bottom + i] = argv[middle + i];
+	      argv[middle + i] = tem;
+	    }
+	  /* Exclude the moved top segment from further swapping.  */
+	  bottom += len;
+	}
+    }
+
+  /* Update records for the slots the non-options now occupy.  */
+
+  d->__first_nonopt += (d->optind - d->__last_nonopt);
+  d->__last_nonopt = d->optind;
+}
+
+/* Process the argument starting with d->__nextchar as a long option.
+   d->optind should *not* have been advanced over this argument.
+
+   If the value returned is -1, it was not actually a long option, the
+   state is unchanged, and the argument should be processed as a set
+   of short options (this can only happen when long_only is true).
+   Otherwise, the option (and its argument, if any) have been consumed
+   and the return value is the value to return from _getopt_internal_r.  */
+static int
+process_long_option (int argc, char **argv, const char *optstring,
+		     const struct option *longopts, int *longind,
+		     int long_only, struct _getopt_data *d,
+		     int print_errors, const char *prefix)
+{
+  char *nameend;
+  size_t namelen;
+  const struct option *p;
+  const struct option *pfound = NULL;
+  int n_options;
+  int option_index;
+
+  for (nameend = d->__nextchar; *nameend && *nameend != '='; nameend++)
+    /* Do nothing.  */ ;
+  namelen = nameend - d->__nextchar;
+
+  /* First look for an exact match, counting the options as a side
+     effect.  */
+  for (p = longopts, n_options = 0; p->name; p++, n_options++)
+    if (!strncmp (p->name, d->__nextchar, namelen)
+	&& namelen == strlen (p->name))
+      {
+	/* Exact match found.  */
+	pfound = p;
+	option_index = n_options;
+	break;
+      }
+
+  if (pfound == NULL)
+    {
+      /* Didn't find an exact match, so look for abbreviations.  */
+      unsigned char *ambig_set = NULL;
+      int ambig_malloced = 0;
+      int ambig_fallback = 0;
+      int indfound = -1;
+
+      for (p = longopts, option_index = 0; p->name; p++, option_index++)
+	if (!strncmp (p->name, d->__nextchar, namelen))
+	  {
+	    if (pfound == NULL)
+	      {
+		/* First nonexact match found.  */
+		pfound = p;
+		indfound = option_index;
+	      }
+	    else if (long_only
+		     || pfound->has_arg != p->has_arg
+		     || pfound->flag != p->flag
+		     || pfound->val != p->val)
+	      {
+		/* Second or later nonexact match found.  */
+		if (!ambig_fallback)
+		  {
+		    if (!print_errors)
+		      /* Don't waste effort tracking the ambig set if
+			 we're not going to print it anyway.  */
+		      ambig_fallback = 1;
+		    else if (!ambig_set)
+		      {
+			if (__libc_use_alloca (n_options))
+			  ambig_set = alloca (n_options);
+			else if ((ambig_set = malloc (n_options)) == NULL)
+			  /* Fall back to simpler error message.  */
+			  ambig_fallback = 1;
+			else
+			  ambig_malloced = 1;
+
+			if (ambig_set)
+			  {
+			    memset (ambig_set, 0, n_options);
+			    ambig_set[indfound] = 1;
+			  }
+		      }
+		    if (ambig_set)
+		      ambig_set[option_index] = 1;
+		  }
+	      }
+	  }
+
+      if (ambig_set || ambig_fallback)
+	{
+	  if (print_errors)
+	    {
+	      if (ambig_fallback)
+		fprintf (stderr, _("%s: option '%s%s' is ambiguous\n"),
+			 argv[0], prefix, d->__nextchar);
+	      else
+		{
+		  flockfile (stderr);
+		  fprintf (stderr,
+			   _("%s: option '%s%s' is ambiguous; possibilities:"),
+			   argv[0], prefix, d->__nextchar);
+
+		  for (option_index = 0; option_index < n_options; option_index++)
+		    if (ambig_set[option_index])
+		      fprintf (stderr, " '%s%s'",
+			       prefix, longopts[option_index].name);
+
+		  /* This must use 'fprintf' even though it's only
+		     printing a single character, so that it goes through
+		     __fxprintf_nocancel when compiled as part of glibc.  */
+		  fprintf (stderr, "\n");
+		  funlockfile (stderr);
+		}
+	    }
+	  if (ambig_malloced)
+	    free (ambig_set);
+	  d->__nextchar += strlen (d->__nextchar);
+	  d->optind++;
+	  d->optopt = 0;
+	  return '?';
+	}
+
+      option_index = indfound;
+    }
+
+  if (pfound == NULL)
+    {
+      /* Can't find it as a long option.  If this is not getopt_long_only,
+	 or the option starts with '--' or is not a valid short option,
+	 then it's an error.  */
+      if (!long_only || argv[d->optind][1] == '-'
+	  || strchr (optstring, *d->__nextchar) == NULL)
+	{
+	  if (print_errors)
+	    fprintf (stderr, _("%s: unrecognized option '%s%s'\n"),
+		     argv[0], prefix, d->__nextchar);
+
+	  d->__nextchar = NULL;
+	  d->optind++;
+	  d->optopt = 0;
+	  return '?';
+	}
+
+      /* Otherwise interpret it as a short option.  */
+      return -1;
+    }
+
+  /* We have found a matching long option.  Consume it.  */
+  d->optind++;
+  d->__nextchar = NULL;
+  if (*nameend)
+    {
+      /* Don't test has_arg with >, because some C compilers don't
+	 allow it to be used on enums.  */
+      if (pfound->has_arg)
+	d->optarg = nameend + 1;
+      else
+	{
+	  if (print_errors)
+	    fprintf (stderr,
+		     _("%s: option '%s%s' doesn't allow an argument\n"),
+		     argv[0], prefix, pfound->name);
+
+	  d->optopt = pfound->val;
+	  return '?';
+	}
+    }
+  else if (pfound->has_arg == 1)
+    {
+      if (d->optind < argc)
+	d->optarg = argv[d->optind++];
+      else
+	{
+	  if (print_errors)
+	    fprintf (stderr,
+		     _("%s: option '%s%s' requires an argument\n"),
+		     argv[0], prefix, pfound->name);
+
+	  d->optopt = pfound->val;
+	  return optstring[0] == ':' ? ':' : '?';
+	}
+    }
+
+  if (longind != NULL)
+    *longind = option_index;
+  if (pfound->flag)
+    {
+      *(pfound->flag) = pfound->val;
+      return 0;
+    }
+  return pfound->val;
+}
+
+/* Initialize internal data upon the first call to getopt.  */
+
+static const char *
+_getopt_initialize (int argc _GL_UNUSED,
+		    char **argv _GL_UNUSED, const char *optstring,
+		    struct _getopt_data *d, int posixly_correct)
+{
+  /* Start processing options with ARGV-element 1 (since ARGV-element 0
+     is the program name); the sequence of previously skipped
+     non-option ARGV-elements is empty.  */
+  if (d->optind == 0)
+    d->optind = 1;
+
+  d->__first_nonopt = d->__last_nonopt = d->optind;
+  d->__nextchar = NULL;
+
+  /* Determine how to handle the ordering of options and nonoptions.  */
+  if (optstring[0] == '-')
+    {
+      d->__ordering = RETURN_IN_ORDER;
+      ++optstring;
+    }
+  else if (optstring[0] == '+')
+    {
+      d->__ordering = REQUIRE_ORDER;
+      ++optstring;
+    }
+  else if (posixly_correct || !!getenv ("POSIXLY_CORRECT"))
+    d->__ordering = REQUIRE_ORDER;
+  else
+    d->__ordering = PERMUTE;
+
+  d->__initialized = 1;
+  return optstring;
+}
+
+/* Scan elements of ARGV (whose length is ARGC) for option characters
+   given in OPTSTRING.
+
+   If an element of ARGV starts with '-', and is not exactly "-" or "--",
+   then it is an option element.  The characters of this element
+   (aside from the initial '-') are option characters.  If 'getopt'
+   is called repeatedly, it returns successively each of the option characters
+   from each of the option elements.
+
+   If 'getopt' finds another option character, it returns that character,
+   updating 'optind' and 'nextchar' so that the next call to 'getopt' can
+   resume the scan with the following option character or ARGV-element.
+
+   If there are no more option characters, 'getopt' returns -1.
+   Then 'optind' is the index in ARGV of the first ARGV-element
+   that is not an option.  (The ARGV-elements have been permuted
+   so that those that are not options now come last.)
+
+   OPTSTRING is a string containing the legitimate option characters.
+   If an option character is seen that is not listed in OPTSTRING,
+   return '?' after printing an error message.  If you set 'opterr' to
+   zero, the error message is suppressed but we still return '?'.
+
+   If a char in OPTSTRING is followed by a colon, that means it wants an arg,
+   so the following text in the same ARGV-element, or the text of the following
+   ARGV-element, is returned in 'optarg'.  Two colons mean an option that
+   wants an optional arg; if there is text in the current ARGV-element,
+   it is returned in 'optarg', otherwise 'optarg' is set to zero.
+
+   If OPTSTRING starts with '-' or '+', it requests different methods of
+   handling the non-option ARGV-elements.
+   See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
+
+   Long-named options begin with '--' instead of '-'.
+   Their names may be abbreviated as long as the abbreviation is unique
+   or is an exact match for some defined option.  If they have an
+   argument, it follows the option name in the same ARGV-element, separated
+   from the option name by a '=', or else the in next ARGV-element.
+   When 'getopt' finds a long-named option, it returns 0 if that option's
+   'flag' field is nonzero, the value of the option's 'val' field
+   if the 'flag' field is zero.
+
+   The elements of ARGV aren't really const, because we permute them.
+   But we pretend they're const in the prototype to be compatible
+   with other systems.
+
+   LONGOPTS is a vector of 'struct option' terminated by an
+   element containing a name which is zero.
+
+   LONGIND returns the index in LONGOPT of the long-named option found.
+   It is only valid when a long-named option has been found by the most
+   recent call.
+
+   If LONG_ONLY is nonzero, '-' as well as '--' can introduce
+   long-named options.  */
+
+int
+_getopt_internal_r (int argc, char **argv, const char *optstring,
+		    const struct option *longopts, int *longind,
+		    int long_only, struct _getopt_data *d, int posixly_correct)
+{
+  int print_errors = d->opterr;
+
+  if (argc < 1)
+    return -1;
+
+  d->optarg = NULL;
+
+  if (d->optind == 0 || !d->__initialized)
+    optstring = _getopt_initialize (argc, argv, optstring, d, posixly_correct);
+  else if (optstring[0] == '-' || optstring[0] == '+')
+    optstring++;
+
+  if (optstring[0] == ':')
+    print_errors = 0;
+
+  /* Test whether ARGV[optind] points to a non-option argument.  */
+#define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0')
+
+  if (d->__nextchar == NULL || *d->__nextchar == '\0')
+    {
+      /* Advance to the next ARGV-element.  */
+
+      /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
+	 moved back by the user (who may also have changed the arguments).  */
+      if (d->__last_nonopt > d->optind)
+	d->__last_nonopt = d->optind;
+      if (d->__first_nonopt > d->optind)
+	d->__first_nonopt = d->optind;
+
+      if (d->__ordering == PERMUTE)
+	{
+	  /* If we have just processed some options following some non-options,
+	     exchange them so that the options come first.  */
+
+	  if (d->__first_nonopt != d->__last_nonopt
+	      && d->__last_nonopt != d->optind)
+	    exchange (argv, d);
+	  else if (d->__last_nonopt != d->optind)
+	    d->__first_nonopt = d->optind;
+
+	  /* Skip any additional non-options
+	     and extend the range of non-options previously skipped.  */
+
+	  while (d->optind < argc && NONOPTION_P)
+	    d->optind++;
+	  d->__last_nonopt = d->optind;
+	}
+
+      /* The special ARGV-element '--' means premature end of options.
+	 Skip it like a null option,
+	 then exchange with previous non-options as if it were an option,
+	 then skip everything else like a non-option.  */
+
+      if (d->optind != argc && !strcmp (argv[d->optind], "--"))
+	{
+	  d->optind++;
+
+	  if (d->__first_nonopt != d->__last_nonopt
+	      && d->__last_nonopt != d->optind)
+	    exchange (argv, d);
+	  else if (d->__first_nonopt == d->__last_nonopt)
+	    d->__first_nonopt = d->optind;
+	  d->__last_nonopt = argc;
+
+	  d->optind = argc;
+	}
+
+      /* If we have done all the ARGV-elements, stop the scan
+	 and back over any non-options that we skipped and permuted.  */
+
+      if (d->optind == argc)
+	{
+	  /* Set the next-arg-index to point at the non-options
+	     that we previously skipped, so the caller will digest them.  */
+	  if (d->__first_nonopt != d->__last_nonopt)
+	    d->optind = d->__first_nonopt;
+	  return -1;
+	}
+
+      /* If we have come to a non-option and did not permute it,
+	 either stop the scan or describe it to the caller and pass it by.  */
+
+      if (NONOPTION_P)
+	{
+	  if (d->__ordering == REQUIRE_ORDER)
+	    return -1;
+	  d->optarg = argv[d->optind++];
+	  return 1;
+	}
+
+      /* We have found another option-ARGV-element.
+	 Check whether it might be a long option.  */
+      if (longopts)
+	{
+	  if (argv[d->optind][1] == '-')
+	    {
+	      /* "--foo" is always a long option.  The special option
+		 "--" was handled above.  */
+	      d->__nextchar = argv[d->optind] + 2;
+	      return process_long_option (argc, argv, optstring, longopts,
+					  longind, long_only, d,
+					  print_errors, "--");
+	    }
+
+	  /* If long_only and the ARGV-element has the form "-f",
+	     where f is a valid short option, don't consider it an
+	     abbreviated form of a long option that starts with f.
+	     Otherwise there would be no way to give the -f short
+	     option.
+
+	     On the other hand, if there's a long option "fubar" and
+	     the ARGV-element is "-fu", do consider that an
+	     abbreviation of the long option, just like "--fu", and
+	     not "-f" with arg "u".
+
+	     This distinction seems to be the most useful approach.  */
+	  if (long_only && (argv[d->optind][2]
+			    || !strchr (optstring, argv[d->optind][1])))
+	    {
+	      int code;
+	      d->__nextchar = argv[d->optind] + 1;
+	      code = process_long_option (argc, argv, optstring, longopts,
+					  longind, long_only, d,
+					  print_errors, "-");
+	      if (code != -1)
+		return code;
+	    }
+	}
+
+      /* It is not a long option.  Skip the initial punctuation.  */
+      d->__nextchar = argv[d->optind] + 1;
+    }
+
+  /* Look at and handle the next short option-character.  */
+
+  {
+    char c = *d->__nextchar++;
+    const char *temp = strchr (optstring, c);
+
+    /* Increment 'optind' when we start to process its last character.  */
+    if (*d->__nextchar == '\0')
+      ++d->optind;
+
+    if (temp == NULL || c == ':' || c == ';')
+      {
+	if (print_errors)
+	  fprintf (stderr, _("%s: invalid option -- '%c'\n"), argv[0], c);
+	d->optopt = c;
+	return '?';
+      }
+
+    /* Convenience. Treat POSIX -W foo same as long option --foo */
+    if (temp[0] == 'W' && temp[1] == ';' && longopts != NULL)
+      {
+	/* This is an option that requires an argument.  */
+	if (*d->__nextchar != '\0')
+	  d->optarg = d->__nextchar;
+	else if (d->optind == argc)
+	  {
+	    if (print_errors)
+	      fprintf (stderr,
+		       _("%s: option requires an argument -- '%c'\n"),
+		       argv[0], c);
+
+	    d->optopt = c;
+	    if (optstring[0] == ':')
+	      c = ':';
+	    else
+	      c = '?';
+	    return c;
+	  }
+	else
+	  d->optarg = argv[d->optind];
+
+	d->__nextchar = d->optarg;
+	d->optarg = NULL;
+	return process_long_option (argc, argv, optstring, longopts, longind,
+				    0 /* long_only */, d, print_errors, "-W ");
+      }
+    if (temp[1] == ':')
+      {
+	if (temp[2] == ':')
+	  {
+	    /* This is an option that accepts an argument optionally.  */
+	    if (*d->__nextchar != '\0')
+	      {
+		d->optarg = d->__nextchar;
+		d->optind++;
+	      }
+	    else
+	      d->optarg = NULL;
+	    d->__nextchar = NULL;
+	  }
+	else
+	  {
+	    /* This is an option that requires an argument.  */
+	    if (*d->__nextchar != '\0')
+	      {
+		d->optarg = d->__nextchar;
+		/* If we end this ARGV-element by taking the rest as an arg,
+		   we must advance to the next element now.  */
+		d->optind++;
+	      }
+	    else if (d->optind == argc)
+	      {
+		if (print_errors)
+		  fprintf (stderr,
+			   _("%s: option requires an argument -- '%c'\n"),
+			   argv[0], c);
+
+		d->optopt = c;
+		if (optstring[0] == ':')
+		  c = ':';
+		else
+		  c = '?';
+	      }
+	    else
+	      /* We already incremented 'optind' once;
+		 increment it again when taking next ARGV-elt as argument.  */
+	      d->optarg = argv[d->optind++];
+	    d->__nextchar = NULL;
+	  }
+      }
+    return c;
+  }
+}
+
+int
+_getopt_internal (int argc, char **argv, const char *optstring,
+		  const struct option *longopts, int *longind, int long_only,
+		  int posixly_correct)
+{
+  int result;
+
+  getopt_data.optind = optind;
+  getopt_data.opterr = opterr;
+
+  result = _getopt_internal_r (argc, argv, optstring, longopts,
+			       longind, long_only, &getopt_data,
+			       posixly_correct);
+
+  optind = getopt_data.optind;
+  optarg = getopt_data.optarg;
+  optopt = getopt_data.optopt;
+
+  return result;
+}
+
+/* glibc gets a LSB-compliant getopt and a POSIX-complaint __posix_getopt.
+   Standalone applications just get a POSIX-compliant getopt.
+   POSIX and LSB both require these functions to take 'char *const *argv'
+   even though this is incorrect (because of the permutation).  */
+#define GETOPT_ENTRY(NAME, POSIXLY_CORRECT)			\
+  int								\
+  NAME (int argc, char *const *argv, const char *optstring)	\
+  {								\
+    return _getopt_internal (argc, (char **)argv, optstring,	\
+			     0, 0, 0, POSIXLY_CORRECT);		\
+  }
+
+#ifdef _LIBC
+GETOPT_ENTRY(getopt, 0)
+GETOPT_ENTRY(__posix_getopt, 1)
+#else
+GETOPT_ENTRY(getopt, 1)
+#endif
+
+
+#ifdef TEST
+
+/* Compile with -DTEST to make an executable for use in testing
+   the above definition of 'getopt'.  */
+
+int
+main (int argc, char **argv)
+{
+  int c;
+  int digit_optind = 0;
+
+  while (1)
+    {
+      int this_option_optind = optind ? optind : 1;
+
+      c = getopt (argc, argv, "abc:d:0123456789");
+      if (c == -1)
+	break;
+
+      switch (c)
+	{
+	case '0':
+	case '1':
+	case '2':
+	case '3':
+	case '4':
+	case '5':
+	case '6':
+	case '7':
+	case '8':
+	case '9':
+	  if (digit_optind != 0 && digit_optind != this_option_optind)
+	    printf ("digits occur in two different argv-elements.\n");
+	  digit_optind = this_option_optind;
+	  printf ("option %c\n", c);
+	  break;
+
+	case 'a':
+	  printf ("option a\n");
+	  break;
+
+	case 'b':
+	  printf ("option b\n");
+	  break;
+
+	case 'c':
+	  printf ("option c with value '%s'\n", optarg);
+	  break;
+
+	case '?':
+	  break;
+
+	default:
+	  printf ("?? getopt returned character code 0%o ??\n", c);
+	}
+    }
+
+  if (optind < argc)
+    {
+      printf ("non-option ARGV-elements: ");
+      while (optind < argc)
+	printf ("%s ", argv[optind++]);
+      printf ("\n");
+    }
+
+  exit (0);
+}
+
+#endif /* TEST */
diff --git a/src/grep/lib/getopt.in.h b/src/grep/lib/getopt.in.h
new file mode 100644
index 0000000..bf884f0
--- /dev/null
+++ b/src/grep/lib/getopt.in.h
@@ -0,0 +1,61 @@
+/* Declarations for getopt.
+   Copyright (C) 1989-2021 Free Software Foundation, Inc.
+   This file is part of gnulib.
+   Unlike most of the getopt implementation, it is NOT shared
+   with the GNU C Library, which supplies a different version of
+   this file.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _@GUARD_PREFIX@_GETOPT_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard.  We must
+   also inform the replacement unistd.h to not recursively use
+   <getopt.h>; our definitions will be present soon enough.  */
+#if @HAVE_GETOPT_H@
+# define _GL_SYSTEM_GETOPT
+# @INCLUDE_NEXT@ @NEXT_GETOPT_H@
+# undef _GL_SYSTEM_GETOPT
+#endif
+
+#define _@GUARD_PREFIX@_GETOPT_H 1
+
+/* Standalone applications should #define __GETOPT_PREFIX to an
+   identifier that prefixes the external functions and variables
+   defined in getopt-core.h and getopt-ext.h.  When this happens,
+   include the headers that might declare getopt so that they will not
+   cause confusion if included after this file (if the system had
+   <getopt.h>, we have already included it).  */
+#if defined __GETOPT_PREFIX
+# if !@HAVE_GETOPT_H@
+#  define __need_system_stdlib_h
+#  include <stdlib.h>
+#  undef __need_system_stdlib_h
+#  include <stdio.h>
+#  include <unistd.h>
+# endif
+#endif
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+#include <getopt-cdefs.h>
+#include <getopt-pfx-core.h>
+#include <getopt-pfx-ext.h>
+
+#endif /* _@GUARD_PREFIX@_GETOPT_H */
diff --git a/src/grep/lib/getopt1.c b/src/grep/lib/getopt1.c
new file mode 100644
index 0000000..5a92806
--- /dev/null
+++ b/src/grep/lib/getopt1.c
@@ -0,0 +1,159 @@
+/* getopt_long and getopt_long_only entry points for GNU getopt.
+   Copyright (C) 1987-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library and is also part of gnulib.
+   Patches to this file should be submitted to both projects.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _LIBC
+# include <config.h>
+#endif
+
+#include "getopt.h"
+#include "getopt_int.h"
+
+int
+getopt_long (int argc, char *__getopt_argv_const *argv, const char *options,
+	     const struct option *long_options, int *opt_index)
+{
+  return _getopt_internal (argc, (char **) argv, options, long_options,
+			   opt_index, 0, 0);
+}
+
+int
+_getopt_long_r (int argc, char **argv, const char *options,
+		const struct option *long_options, int *opt_index,
+		struct _getopt_data *d)
+{
+  return _getopt_internal_r (argc, argv, options, long_options, opt_index,
+			     0, d, 0);
+}
+
+/* Like getopt_long, but '-' as well as '--' can indicate a long option.
+   If an option that starts with '-' (not '--') doesn't match a long option,
+   but does match a short option, it is parsed as a short option
+   instead.  */
+
+int
+getopt_long_only (int argc, char *__getopt_argv_const *argv,
+		  const char *options,
+		  const struct option *long_options, int *opt_index)
+{
+  return _getopt_internal (argc, (char **) argv, options, long_options,
+			   opt_index, 1, 0);
+}
+
+int
+_getopt_long_only_r (int argc, char **argv, const char *options,
+		     const struct option *long_options, int *opt_index,
+		     struct _getopt_data *d)
+{
+  return _getopt_internal_r (argc, argv, options, long_options, opt_index,
+			     1, d, 0);
+}
+
+
+#ifdef TEST
+
+#include <stdio.h>
+#include <stdlib.h>
+
+int
+main (int argc, char **argv)
+{
+  int c;
+  int digit_optind = 0;
+
+  while (1)
+    {
+      int this_option_optind = optind ? optind : 1;
+      int option_index = 0;
+      static const struct option long_options[] =
+      {
+	{"add", 1, 0, 0},
+	{"append", 0, 0, 0},
+	{"delete", 1, 0, 0},
+	{"verbose", 0, 0, 0},
+	{"create", 0, 0, 0},
+	{"file", 1, 0, 0},
+	{0, 0, 0, 0}
+      };
+
+      c = getopt_long (argc, argv, "abc:d:0123456789",
+		       long_options, &option_index);
+      if (c == -1)
+	break;
+
+      switch (c)
+	{
+	case 0:
+	  printf ("option %s", long_options[option_index].name);
+	  if (optarg)
+	    printf (" with arg %s", optarg);
+	  printf ("\n");
+	  break;
+
+	case '0':
+	case '1':
+	case '2':
+	case '3':
+	case '4':
+	case '5':
+	case '6':
+	case '7':
+	case '8':
+	case '9':
+	  if (digit_optind != 0 && digit_optind != this_option_optind)
+	    printf ("digits occur in two different argv-elements.\n");
+	  digit_optind = this_option_optind;
+	  printf ("option %c\n", c);
+	  break;
+
+	case 'a':
+	  printf ("option a\n");
+	  break;
+
+	case 'b':
+	  printf ("option b\n");
+	  break;
+
+	case 'c':
+	  printf ("option c with value '%s'\n", optarg);
+	  break;
+
+	case 'd':
+	  printf ("option d with value '%s'\n", optarg);
+	  break;
+
+	case '?':
+	  break;
+
+	default:
+	  printf ("?? getopt returned character code 0%o ??\n", c);
+	}
+    }
+
+  if (optind < argc)
+    {
+      printf ("non-option ARGV-elements: ");
+      while (optind < argc)
+	printf ("%s ", argv[optind++]);
+      printf ("\n");
+    }
+
+  exit (0);
+}
+
+#endif /* TEST */
diff --git a/src/grep/lib/getopt_int.h b/src/grep/lib/getopt_int.h
new file mode 100644
index 0000000..91254e4
--- /dev/null
+++ b/src/grep/lib/getopt_int.h
@@ -0,0 +1,118 @@
+/* Internal declarations for getopt.
+   Copyright (C) 1989-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library and is also part of gnulib.
+   Patches to this file should be submitted to both projects.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GETOPT_INT_H
+#define _GETOPT_INT_H	1
+
+#include <getopt.h>
+
+extern int _getopt_internal (int ___argc, char **___argv,
+			     const char *__shortopts,
+			     const struct option *__longopts, int *__longind,
+			     int __long_only, int __posixly_correct);
+
+
+/* Reentrant versions which can handle parsing multiple argument
+   vectors at the same time.  */
+
+/* Describe how to deal with options that follow non-option ARGV-elements.
+
+   REQUIRE_ORDER means don't recognize them as options; stop option
+   processing when the first non-option is seen.  This is what POSIX
+   specifies should happen.
+
+   PERMUTE means permute the contents of ARGV as we scan, so that
+   eventually all the non-options are at the end.  This allows options
+   to be given in any order, even with programs that were not written
+   to expect this.
+
+   RETURN_IN_ORDER is an option available to programs that were
+   written to expect options and other ARGV-elements in any order
+   and that care about the ordering of the two.  We describe each
+   non-option ARGV-element as if it were the argument of an option
+   with character code 1.
+
+   The special argument '--' forces an end of option-scanning regardless
+   of the value of 'ordering'.  In the case of RETURN_IN_ORDER, only
+   '--' can cause 'getopt' to return -1 with 'optind' != ARGC.  */
+
+enum __ord
+  {
+    REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
+  };
+
+/* Data type for reentrant functions.  */
+struct _getopt_data
+{
+  /* These have exactly the same meaning as the corresponding global
+     variables, except that they are used for the reentrant
+     versions of getopt.  */
+  int optind;
+  int opterr;
+  int optopt;
+  char *optarg;
+
+  /* Internal members.  */
+
+  /* True if the internal members have been initialized.  */
+  int __initialized;
+
+  /* The next char to be scanned in the option-element
+     in which the last option character we returned was found.
+     This allows us to pick up the scan where we left off.
+
+     If this is zero, or a null string, it means resume the scan
+     by advancing to the next ARGV-element.  */
+  char *__nextchar;
+
+  /* See __ord above.  */
+  enum __ord __ordering;
+
+  /* Handle permutation of arguments.  */
+
+  /* Describe the part of ARGV that contains non-options that have
+     been skipped.  'first_nonopt' is the index in ARGV of the first
+     of them; 'last_nonopt' is the index after the last of them.  */
+
+  int __first_nonopt;
+  int __last_nonopt;
+};
+
+/* The initializer is necessary to set OPTIND and OPTERR to their
+   default values and to clear the initialization flag.  */
+#define _GETOPT_DATA_INITIALIZER	{ 1, 1 }
+
+extern int _getopt_internal_r (int ___argc, char **___argv,
+			       const char *__shortopts,
+			       const struct option *__longopts, int *__longind,
+			       int __long_only, struct _getopt_data *__data,
+			       int __posixly_correct);
+
+extern int _getopt_long_r (int ___argc, char **___argv,
+			   const char *__shortopts,
+			   const struct option *__longopts, int *__longind,
+			   struct _getopt_data *__data);
+
+extern int _getopt_long_only_r (int ___argc, char **___argv,
+				const char *__shortopts,
+				const struct option *__longopts,
+				int *__longind,
+				struct _getopt_data *__data);
+
+#endif /* getopt_int.h */
diff --git a/src/grep/lib/getpagesize.c b/src/grep/lib/getpagesize.c
new file mode 100644
index 0000000..b7493ec
--- /dev/null
+++ b/src/grep/lib/getpagesize.c
@@ -0,0 +1,39 @@
+/* getpagesize emulation for systems where it cannot be done in a C macro.
+
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible and Martin Lambers.  */
+
+#include <config.h>
+
+/* Specification. */
+#include <unistd.h>
+
+/* This implementation is only for native Windows systems.  */
+#if defined _WIN32 && ! defined __CYGWIN__
+
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+
+int
+getpagesize (void)
+{
+  SYSTEM_INFO system_info;
+  GetSystemInfo (&system_info);
+  return system_info.dwPageSize;
+}
+
+#endif
diff --git a/src/grep/lib/getprogname-w32.c b/src/grep/lib/getprogname-w32.c
new file mode 100644
index 0000000..ab02a6c
--- /dev/null
+++ b/src/grep/lib/getprogname-w32.c
@@ -0,0 +1,24 @@
+/* Added by bird - Public Domain. */

+

+#include <windows.h>

+#include <string.h>

+

+static char g_szProgName[260] = {0};

+

+const char *getprogname(void)

+{

+    if (g_szProgName[0] == '\0')

+    {

+        char       szName[260];

+        UINT const cchName = GetModuleFileNameA(NULL, szName, sizeof(szName));

+        UINT       offName = cchName;

+        while (   offName > 0

+               && szName[offName - 1] != '\\'

+               && szName[offName - 1] != '/'

+               && szName[offName - 1] != ':')

+            offName--;

+        memcpy(g_szProgName, &szName[offName], cchName - offName);

+    }

+    return g_szProgName;

+}

+

diff --git a/src/grep/lib/getprogname.c b/src/grep/lib/getprogname.c
new file mode 100644
index 0000000..9a80281
--- /dev/null
+++ b/src/grep/lib/getprogname.c
@@ -0,0 +1,302 @@
+/* Program name management.
+   Copyright (C) 2016-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation; either version 2.1 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "getprogname.h"
+
+#include <errno.h> /* get program_invocation_name declaration */
+#include <stdlib.h> /* get __argv declaration */
+
+#ifdef _AIX
+# include <unistd.h>
+# include <procinfo.h>
+# include <string.h>
+#endif
+
+#ifdef __MVS__
+# ifndef _OPEN_SYS
+#  define _OPEN_SYS
+# endif
+# include <string.h>
+# include <sys/ps.h>
+#endif
+
+#ifdef __hpux
+# include <unistd.h>
+# include <sys/param.h>
+# include <sys/pstat.h>
+# include <string.h>
+#endif
+
+#if defined __sgi || defined __osf__
+# include <string.h>
+# include <unistd.h>
+# include <stdio.h>
+# include <fcntl.h>
+# include <sys/procfs.h>
+#endif
+
+#if defined __SCO_VERSION__ || defined __sysv5__
+# include <fcntl.h>
+# include <stdlib.h>
+# include <string.h>
+#endif
+
+#include "basename-lgpl.h"
+
+#ifndef HAVE_GETPROGNAME             /* not Mac OS X, FreeBSD, NetBSD, OpenBSD >= 5.4, Cygwin */
+char const *
+getprogname (void)
+{
+# if HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME                /* glibc, BeOS */
+  /* https://www.gnu.org/software/libc/manual/html_node/Error-Messages.html */
+  return program_invocation_short_name;
+# elif HAVE_DECL_PROGRAM_INVOCATION_NAME                    /* glibc, BeOS */
+  /* https://www.gnu.org/software/libc/manual/html_node/Error-Messages.html */
+  return last_component (program_invocation_name);
+# elif HAVE_GETEXECNAME                                     /* Solaris */
+  /* https://docs.oracle.com/cd/E19253-01/816-5168/6mbb3hrb1/index.html */
+  const char *p = getexecname ();
+  if (!p)
+    p = "?";
+  return last_component (p);
+# elif HAVE_DECL___ARGV                                     /* mingw, MSVC */
+  /* https://docs.microsoft.com/en-us/cpp/c-runtime-library/argc-argv-wargv */
+  const char *p = __argv && __argv[0] ? __argv[0] : "?";
+  return last_component (p);
+# elif HAVE_VAR___PROGNAME                                  /* OpenBSD, Android, QNX */
+  /* https://man.openbsd.org/style.9 */
+  /* http://www.qnx.de/developers/docs/6.5.0/index.jsp?topic=%2Fcom.qnx.doc.neutrino_lib_ref%2Fp%2F__progname.html */
+  /* Be careful to declare this only when we absolutely need it
+     (OpenBSD 5.1), rather than when it's available.  Otherwise,
+     its mere declaration makes program_invocation_short_name
+     malfunction (have zero length) with Fedora 25's glibc.  */
+  extern char *__progname;
+  const char *p = __progname;
+#  if defined __ANDROID__
+  return last_component (p);
+#  else
+  return p && p[0] ? p : "?";
+#  endif
+# elif _AIX                                                 /* AIX */
+  /* Idea by Bastien ROUCARIÈS,
+     https://lists.gnu.org/r/bug-gnulib/2010-12/msg00095.html
+     Reference: https://www.ibm.com/support/knowledgecenter/en/ssw_aix_61/com.ibm.aix.basetrf1/getprocs.htm
+  */
+  static char *p;
+  static int first = 1;
+  if (first)
+    {
+      first = 0;
+      pid_t pid = getpid ();
+      struct procentry64 procs;
+      p = (0 < getprocs64 (&procs, sizeof procs, NULL, 0, &pid, 1)
+           ? strdup (procs.pi_comm)
+           : NULL);
+      if (!p)
+        p = "?";
+    }
+  return p;
+# elif defined __hpux
+  static char *p;
+  static int first = 1;
+  if (first)
+    {
+      first = 0;
+      pid_t pid = getpid ();
+      struct pst_status status;
+      if (pstat_getproc (&status, sizeof status, 0, pid) > 0)
+        {
+          char *ucomm = status.pst_ucomm;
+          char *cmd = status.pst_cmd;
+          if (strlen (ucomm) < PST_UCOMMLEN - 1)
+            p = ucomm;
+          else
+            {
+              /* ucomm is truncated to length PST_UCOMMLEN - 1.
+                 Look at cmd instead.  */
+              char *space = strchr (cmd, ' ');
+              if (space != NULL)
+                *space = '\0';
+              p = strrchr (cmd, '/');
+              if (p != NULL)
+                p++;
+              else
+                p = cmd;
+              if (strlen (p) > PST_UCOMMLEN - 1
+                  && memcmp (p, ucomm, PST_UCOMMLEN - 1) == 0)
+                /* p is less truncated than ucomm.  */
+                ;
+              else
+                p = ucomm;
+            }
+          p = strdup (p);
+        }
+      else
+        {
+#  if !defined __LP64__
+          /* Support for 32-bit programs running in 64-bit HP-UX.
+             The documented way to do this is to use the same source code
+             as above, but in a compilation unit where '#define _PSTAT64 1'
+             is in effect.  I prefer a single compilation unit; the struct
+             size and the offsets are not going to change.  */
+          char status64[1216];
+          if (__pstat_getproc64 (status64, sizeof status64, 0, pid) > 0)
+            {
+              char *ucomm = status64 + 288;
+              char *cmd = status64 + 168;
+              if (strlen (ucomm) < PST_UCOMMLEN - 1)
+                p = ucomm;
+              else
+                {
+                  /* ucomm is truncated to length PST_UCOMMLEN - 1.
+                     Look at cmd instead.  */
+                  char *space = strchr (cmd, ' ');
+                  if (space != NULL)
+                    *space = '\0';
+                  p = strrchr (cmd, '/');
+                  if (p != NULL)
+                    p++;
+                  else
+                    p = cmd;
+                  if (strlen (p) > PST_UCOMMLEN - 1
+                      && memcmp (p, ucomm, PST_UCOMMLEN - 1) == 0)
+                    /* p is less truncated than ucomm.  */
+                    ;
+                  else
+                    p = ucomm;
+                }
+              p = strdup (p);
+            }
+          else
+#  endif
+            p = NULL;
+        }
+      if (!p)
+        p = "?";
+    }
+  return p;
+# elif __MVS__                                              /* z/OS */
+  /* https://www.ibm.com/support/knowledgecenter/SSLTBW_2.1.0/com.ibm.zos.v2r1.bpxbd00/rtwgetp.htm */
+  static char *p = "?";
+  static int first = 1;
+  if (first)
+    {
+      pid_t pid = getpid ();
+      int token;
+      W_PSPROC buf;
+      first = 0;
+      memset (&buf, 0, sizeof(buf));
+      buf.ps_cmdptr    = (char *) malloc (buf.ps_cmdlen    = PS_CMDBLEN_LONG);
+      buf.ps_conttyptr = (char *) malloc (buf.ps_conttylen = PS_CONTTYBLEN);
+      buf.ps_pathptr   = (char *) malloc (buf.ps_pathlen   = PS_PATHBLEN);
+      if (buf.ps_cmdptr && buf.ps_conttyptr && buf.ps_pathptr)
+        {
+          for (token = 0; token >= 0;
+               token = w_getpsent (token, &buf, sizeof(buf)))
+            {
+              if (token > 0 && buf.ps_pid == pid)
+                {
+                  char *s = strdup (last_component (buf.ps_pathptr));
+                  if (s)
+                    p = s;
+                  break;
+                }
+            }
+        }
+      free (buf.ps_cmdptr);
+      free (buf.ps_conttyptr);
+      free (buf.ps_pathptr);
+    }
+  return p;
+# elif defined __sgi || defined __osf__                     /* IRIX or Tru64 */
+  char filename[50];
+  int fd;
+
+  # if defined __sgi
+    sprintf (filename, "/proc/pinfo/%d", (int) getpid ());
+  # else
+    sprintf (filename, "/proc/%d", (int) getpid ());
+  # endif
+  fd = open (filename, O_RDONLY | O_CLOEXEC);
+  if (0 <= fd)
+    {
+      prpsinfo_t buf;
+      int ioctl_ok = 0 <= ioctl (fd, PIOCPSINFO, &buf);
+      close (fd);
+      if (ioctl_ok)
+        {
+          char *name = buf.pr_fname;
+          size_t namesize = sizeof buf.pr_fname;
+          /* It may not be NUL-terminated.  */
+          char *namenul = memchr (name, '\0', namesize);
+          size_t namelen = namenul ? namenul - name : namesize;
+          char *namecopy = malloc (namelen + 1);
+          if (namecopy)
+            {
+              namecopy[namelen] = '\0';
+              return memcpy (namecopy, name, namelen);
+            }
+        }
+    }
+  return NULL;
+# elif defined __SCO_VERSION__ || defined __sysv5__                /* SCO OpenServer6/UnixWare */
+  char buf[80];
+  int fd;
+  sprintf (buf, "/proc/%d/cmdline", getpid());
+  fd = open (buf, O_RDONLY);
+  if (0 <= fd)
+    {
+      size_t n = read (fd, buf, 79);
+      if (n > 0)
+        {
+          buf[n] = '\0'; /* Guarantee null-termination */
+          char *progname;
+          progname = strrchr (buf, '/');
+          if (progname)
+            {
+              progname = progname + 1; /* Skip the '/' */
+            }
+          else
+            {
+              progname = buf;
+            }
+          char *ret;
+          ret = malloc (strlen (progname) + 1);
+          if (ret)
+            {
+              strcpy (ret, progname);
+              return ret;
+            }
+        }
+      close (fd);
+    }
+  return "?";
+# else
+#  error "getprogname module not ported to this OS"
+# endif
+}
+
+#endif
+
+/*
+ * Hey Emacs!
+ * Local Variables:
+ * coding: utf-8
+ * End:
+ */
diff --git a/src/grep/lib/getprogname.h b/src/grep/lib/getprogname.h
new file mode 100644
index 0000000..eb12dcd
--- /dev/null
+++ b/src/grep/lib/getprogname.h
@@ -0,0 +1,40 @@
+/* Program name management.
+   Copyright (C) 2016-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation; either version 2.1 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GL_GETPROGNAME_H
+#define _GL_GETPROGNAME_H
+
+#include <stdlib.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Return the base name of the executing program.
+   On native Windows this will usually end in ".exe" or ".EXE". */
+#ifndef HAVE_GETPROGNAME
+extern char const *getprogname (void)
+# ifdef HAVE_DECL_PROGRAM_INVOCATION_NAME
+  _GL_ATTRIBUTE_PURE
+# endif
+  ;
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/src/grep/lib/gettext.h b/src/grep/lib/gettext.h
new file mode 100644
index 0000000..f1c7a24
--- /dev/null
+++ b/src/grep/lib/gettext.h
@@ -0,0 +1,301 @@
+/* Convenience header for conditional use of GNU <libintl.h>.
+   Copyright (C) 1995-1998, 2000-2002, 2004-2006, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _LIBGETTEXT_H
+#define _LIBGETTEXT_H 1
+
+/* NLS can be disabled through the configure --disable-nls option
+   or through "#define ENABLE NLS 0" before including this file.  */
+#if defined ENABLE_NLS && ENABLE_NLS
+
+/* Get declarations of GNU message catalog functions.  */
+# include <libintl.h>
+
+/* You can set the DEFAULT_TEXT_DOMAIN macro to specify the domain used by
+   the gettext() and ngettext() macros.  This is an alternative to calling
+   textdomain(), and is useful for libraries.  */
+# ifdef DEFAULT_TEXT_DOMAIN
+#  undef gettext
+#  define gettext(Msgid) \
+     dgettext (DEFAULT_TEXT_DOMAIN, Msgid)
+#  undef ngettext
+#  define ngettext(Msgid1, Msgid2, N) \
+     dngettext (DEFAULT_TEXT_DOMAIN, Msgid1, Msgid2, N)
+# endif
+
+#else
+
+/* Solaris /usr/include/locale.h includes /usr/include/libintl.h, which
+   chokes if dcgettext is defined as a macro.  So include it now, to make
+   later inclusions of <locale.h> a NOP.  We don't include <libintl.h>
+   as well because people using "gettext.h" will not include <libintl.h>,
+   and also including <libintl.h> would fail on SunOS 4, whereas <locale.h>
+   is OK.  */
+#if defined(__sun)
+# include <locale.h>
+#endif
+
+/* Many header files from the libstdc++ coming with g++ 3.3 or newer include
+   <libintl.h>, which chokes if dcgettext is defined as a macro.  So include
+   it now, to make later inclusions of <libintl.h> a NOP.  */
+#if defined(__cplusplus) && defined(__GNUG__) && (__GNUC__ >= 3)
+# include <cstdlib>
+# if (__GLIBC__ >= 2 && !defined __UCLIBC__) || _GLIBCXX_HAVE_LIBINTL_H
+#  include <libintl.h>
+# endif
+#endif
+
+/* Disabled NLS.
+   The casts to 'const char *' serve the purpose of producing warnings
+   for invalid uses of the value returned from these functions.
+   On pre-ANSI systems without 'const', the config.h file is supposed to
+   contain "#define const".  */
+# undef gettext
+# define gettext(Msgid) ((const char *) (Msgid))
+# undef dgettext
+# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
+# undef dcgettext
+# define dcgettext(Domainname, Msgid, Category) \
+    ((void) (Category), dgettext (Domainname, Msgid))
+# undef ngettext
+# define ngettext(Msgid1, Msgid2, N) \
+    ((N) == 1 \
+     ? ((void) (Msgid2), (const char *) (Msgid1)) \
+     : ((void) (Msgid1), (const char *) (Msgid2)))
+# undef dngettext
+# define dngettext(Domainname, Msgid1, Msgid2, N) \
+    ((void) (Domainname), ngettext (Msgid1, Msgid2, N))
+# undef dcngettext
+# define dcngettext(Domainname, Msgid1, Msgid2, N, Category) \
+    ((void) (Category), dngettext (Domainname, Msgid1, Msgid2, N))
+# undef textdomain
+# define textdomain(Domainname) ((const char *) (Domainname))
+# undef bindtextdomain
+# define bindtextdomain(Domainname, Dirname) \
+    ((void) (Domainname), (const char *) (Dirname))
+# undef bind_textdomain_codeset
+# define bind_textdomain_codeset(Domainname, Codeset) \
+    ((void) (Domainname), (const char *) (Codeset))
+
+#endif
+
+/* Prefer gnulib's setlocale override over libintl's setlocale override.  */
+#ifdef GNULIB_defined_setlocale
+# undef setlocale
+# define setlocale rpl_setlocale
+#endif
+
+/* A pseudo function call that serves as a marker for the automated
+   extraction of messages, but does not call gettext().  The run-time
+   translation is done at a different place in the code.
+   The argument, String, should be a literal string.  Concatenated strings
+   and other string expressions won't work.
+   The macro's expansion is not parenthesized, so that it is suitable as
+   initializer for static 'char[]' or 'const char[]' variables.  */
+#define gettext_noop(String) String
+
+/* The separator between msgctxt and msgid in a .mo file.  */
+#define GETTEXT_CONTEXT_GLUE "\004"
+
+/* Pseudo function calls, taking a MSGCTXT and a MSGID instead of just a
+   MSGID.  MSGCTXT and MSGID must be string literals.  MSGCTXT should be
+   short and rarely need to change.
+   The letter 'p' stands for 'particular' or 'special'.  */
+#ifdef DEFAULT_TEXT_DOMAIN
+# define pgettext(Msgctxt, Msgid) \
+   pgettext_aux (DEFAULT_TEXT_DOMAIN, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
+#else
+# define pgettext(Msgctxt, Msgid) \
+   pgettext_aux (NULL, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
+#endif
+#define dpgettext(Domainname, Msgctxt, Msgid) \
+  pgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
+#define dcpgettext(Domainname, Msgctxt, Msgid, Category) \
+  pgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, Category)
+#ifdef DEFAULT_TEXT_DOMAIN
+# define npgettext(Msgctxt, Msgid, MsgidPlural, N) \
+   npgettext_aux (DEFAULT_TEXT_DOMAIN, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
+#else
+# define npgettext(Msgctxt, Msgid, MsgidPlural, N) \
+   npgettext_aux (NULL, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
+#endif
+#define dnpgettext(Domainname, Msgctxt, Msgid, MsgidPlural, N) \
+  npgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
+#define dcnpgettext(Domainname, Msgctxt, Msgid, MsgidPlural, N, Category) \
+  npgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, Category)
+
+#ifdef __GNUC__
+__inline
+#else
+#ifdef __cplusplus
+inline
+#endif
+#endif
+static const char *
+pgettext_aux (const char *domain,
+              const char *msg_ctxt_id, const char *msgid,
+              int category)
+{
+  const char *translation = dcgettext (domain, msg_ctxt_id, category);
+  if (translation == msg_ctxt_id)
+    return msgid;
+  else
+    return translation;
+}
+
+#ifdef __GNUC__
+__inline
+#else
+#ifdef __cplusplus
+inline
+#endif
+#endif
+static const char *
+npgettext_aux (const char *domain,
+               const char *msg_ctxt_id, const char *msgid,
+               const char *msgid_plural, unsigned long int n,
+               int category)
+{
+  const char *translation =
+    dcngettext (domain, msg_ctxt_id, msgid_plural, n, category);
+  if (translation == msg_ctxt_id || translation == msgid_plural)
+    return (n == 1 ? msgid : msgid_plural);
+  else
+    return translation;
+}
+
+/* The same thing extended for non-constant arguments.  Here MSGCTXT and MSGID
+   can be arbitrary expressions.  But for string literals these macros are
+   less efficient than those above.  */
+
+#include <string.h>
+
+/* GNULIB_NO_VLA can be defined to disable use of VLAs even if supported.
+   This relates to the -Wvla and -Wvla-larger-than warnings, enabled in
+   the default GCC many warnings set.  This allows programs to disable use
+   of VLAs, which may be unintended, or may be awkward to support portably,
+   or may have security implications due to non-deterministic stack usage.  */
+
+#if (!defined GNULIB_NO_VLA \
+     && (((__GNUC__ >= 3 || __GNUG__ >= 2) && !defined __STRICT_ANSI__) \
+     /*  || (__STDC_VERSION__ == 199901L && !defined __HP_cc)
+         || (__STDC_VERSION__ >= 201112L && !defined __STDC_NO_VLA__) */ ))
+# define _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS 1
+#else
+# define _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS 0
+#endif
+
+#if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
+#include <stdlib.h>
+#endif
+
+#define pgettext_expr(Msgctxt, Msgid) \
+  dcpgettext_expr (NULL, Msgctxt, Msgid, LC_MESSAGES)
+#define dpgettext_expr(Domainname, Msgctxt, Msgid) \
+  dcpgettext_expr (Domainname, Msgctxt, Msgid, LC_MESSAGES)
+
+#ifdef __GNUC__
+__inline
+#else
+#ifdef __cplusplus
+inline
+#endif
+#endif
+static const char *
+dcpgettext_expr (const char *domain,
+                 const char *msgctxt, const char *msgid,
+                 int category)
+{
+  size_t msgctxt_len = strlen (msgctxt) + 1;
+  size_t msgid_len = strlen (msgid) + 1;
+  const char *translation;
+#if _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
+  char msg_ctxt_id[msgctxt_len + msgid_len];
+#else
+  char buf[1024];
+  char *msg_ctxt_id =
+    (msgctxt_len + msgid_len <= sizeof (buf)
+     ? buf
+     : (char *) malloc (msgctxt_len + msgid_len));
+  if (msg_ctxt_id != NULL)
+#endif
+    {
+      int found_translation;
+      memcpy (msg_ctxt_id, msgctxt, msgctxt_len - 1);
+      msg_ctxt_id[msgctxt_len - 1] = '\004';
+      memcpy (msg_ctxt_id + msgctxt_len, msgid, msgid_len);
+      translation = dcgettext (domain, msg_ctxt_id, category);
+      found_translation = (translation != msg_ctxt_id);
+#if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
+      if (msg_ctxt_id != buf)
+        free (msg_ctxt_id);
+#endif
+      if (found_translation)
+        return translation;
+    }
+  return msgid;
+}
+
+#define npgettext_expr(Msgctxt, Msgid, MsgidPlural, N) \
+  dcnpgettext_expr (NULL, Msgctxt, Msgid, MsgidPlural, N, LC_MESSAGES)
+#define dnpgettext_expr(Domainname, Msgctxt, Msgid, MsgidPlural, N) \
+  dcnpgettext_expr (Domainname, Msgctxt, Msgid, MsgidPlural, N, LC_MESSAGES)
+
+#ifdef __GNUC__
+__inline
+#else
+#ifdef __cplusplus
+inline
+#endif
+#endif
+static const char *
+dcnpgettext_expr (const char *domain,
+                  const char *msgctxt, const char *msgid,
+                  const char *msgid_plural, unsigned long int n,
+                  int category)
+{
+  size_t msgctxt_len = strlen (msgctxt) + 1;
+  size_t msgid_len = strlen (msgid) + 1;
+  const char *translation;
+#if _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
+  char msg_ctxt_id[msgctxt_len + msgid_len];
+#else
+  char buf[1024];
+  char *msg_ctxt_id =
+    (msgctxt_len + msgid_len <= sizeof (buf)
+     ? buf
+     : (char *) malloc (msgctxt_len + msgid_len));
+  if (msg_ctxt_id != NULL)
+#endif
+    {
+      int found_translation;
+      memcpy (msg_ctxt_id, msgctxt, msgctxt_len - 1);
+      msg_ctxt_id[msgctxt_len - 1] = '\004';
+      memcpy (msg_ctxt_id + msgctxt_len, msgid, msgid_len);
+      translation = dcngettext (domain, msg_ctxt_id, msgid_plural, n, category);
+      found_translation = !(translation == msg_ctxt_id || translation == msgid_plural);
+#if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
+      if (msg_ctxt_id != buf)
+        free (msg_ctxt_id);
+#endif
+      if (found_translation)
+        return translation;
+    }
+  return (n == 1 ? msgid : msgid_plural);
+}
+
+#endif /* _LIBGETTEXT_H */
diff --git a/src/grep/lib/glthread/lock.c b/src/grep/lib/glthread/lock.c
new file mode 100644
index 0000000..44335e3
--- /dev/null
+++ b/src/grep/lib/glthread/lock.c
@@ -0,0 +1,749 @@
+/* Locking in multithreaded situations.
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-posix.h, gthr-posix95.h.  */
+
+#include <config.h>
+
+#include "glthread/lock.h"
+
+/* ========================================================================= */
+
+#if USE_ISOC_THREADS || USE_ISOC_AND_POSIX_THREADS
+
+/* -------------------------- gl_lock_t datatype -------------------------- */
+
+int
+glthread_lock_init (gl_lock_t *lock)
+{
+  if (mtx_init (&lock->mutex, mtx_plain) != thrd_success)
+    return ENOMEM;
+  lock->init_needed = 0;
+  return 0;
+}
+
+int
+glthread_lock_lock (gl_lock_t *lock)
+{
+  if (lock->init_needed)
+    call_once (&lock->init_once, lock->init_func);
+  if (mtx_lock (&lock->mutex) != thrd_success)
+    return EAGAIN;
+  return 0;
+}
+
+int
+glthread_lock_unlock (gl_lock_t *lock)
+{
+  if (lock->init_needed)
+    call_once (&lock->init_once, lock->init_func);
+  if (mtx_unlock (&lock->mutex) != thrd_success)
+    return EINVAL;
+  return 0;
+}
+
+int
+glthread_lock_destroy (gl_lock_t *lock)
+{
+  if (lock->init_needed)
+    call_once (&lock->init_once, lock->init_func);
+  mtx_destroy (&lock->mutex);
+  return 0;
+}
+
+/* ------------------------- gl_rwlock_t datatype ------------------------- */
+
+int
+glthread_rwlock_init (gl_rwlock_t *lock)
+{
+  if (mtx_init (&lock->lock, mtx_plain) != thrd_success
+      || cnd_init (&lock->waiting_readers) != thrd_success
+      || cnd_init (&lock->waiting_writers) != thrd_success)
+    return ENOMEM;
+  lock->waiting_writers_count = 0;
+  lock->runcount = 0;
+  lock->init_needed = 0;
+  return 0;
+}
+
+int
+glthread_rwlock_rdlock (gl_rwlock_t *lock)
+{
+  if (lock->init_needed)
+    call_once (&lock->init_once, lock->init_func);
+  if (mtx_lock (&lock->lock) != thrd_success)
+    return EAGAIN;
+  /* Test whether only readers are currently running, and whether the runcount
+     field will not overflow, and whether no writer is waiting.  The latter
+     condition is because POSIX recommends that "write locks shall take
+     precedence over read locks", to avoid "writer starvation".  */
+  while (!(lock->runcount + 1 > 0 && lock->waiting_writers_count == 0))
+    {
+      /* This thread has to wait for a while.  Enqueue it among the
+         waiting_readers.  */
+      if (cnd_wait (&lock->waiting_readers, &lock->lock) != thrd_success)
+        {
+          mtx_unlock (&lock->lock);
+          return EINVAL;
+        }
+    }
+  lock->runcount++;
+  if (mtx_unlock (&lock->lock) != thrd_success)
+    return EINVAL;
+  return 0;
+}
+
+int
+glthread_rwlock_wrlock (gl_rwlock_t *lock)
+{
+  if (lock->init_needed)
+    call_once (&lock->init_once, lock->init_func);
+  if (mtx_lock (&lock->lock) != thrd_success)
+    return EAGAIN;
+  /* Test whether no readers or writers are currently running.  */
+  while (!(lock->runcount == 0))
+    {
+      /* This thread has to wait for a while.  Enqueue it among the
+         waiting_writers.  */
+      lock->waiting_writers_count++;
+      if (cnd_wait (&lock->waiting_writers, &lock->lock) != thrd_success)
+        {
+          lock->waiting_writers_count--;
+          mtx_unlock (&lock->lock);
+          return EINVAL;
+        }
+      lock->waiting_writers_count--;
+    }
+  lock->runcount--; /* runcount becomes -1 */
+  if (mtx_unlock (&lock->lock) != thrd_success)
+    return EINVAL;
+  return 0;
+}
+
+int
+glthread_rwlock_unlock (gl_rwlock_t *lock)
+{
+  if (lock->init_needed)
+    call_once (&lock->init_once, lock->init_func);
+  if (mtx_lock (&lock->lock) != thrd_success)
+    return EAGAIN;
+  if (lock->runcount < 0)
+    {
+      /* Drop a writer lock.  */
+      if (!(lock->runcount == -1))
+        {
+          mtx_unlock (&lock->lock);
+          return EINVAL;
+        }
+      lock->runcount = 0;
+    }
+  else
+    {
+      /* Drop a reader lock.  */
+      if (!(lock->runcount > 0))
+        {
+          mtx_unlock (&lock->lock);
+          return EINVAL;
+        }
+      lock->runcount--;
+    }
+  if (lock->runcount == 0)
+    {
+      /* POSIX recommends that "write locks shall take precedence over read
+         locks", to avoid "writer starvation".  */
+      if (lock->waiting_writers_count > 0)
+        {
+          /* Wake up one of the waiting writers.  */
+          if (cnd_signal (&lock->waiting_writers) != thrd_success)
+            {
+              mtx_unlock (&lock->lock);
+              return EINVAL;
+            }
+        }
+      else
+        {
+          /* Wake up all waiting readers.  */
+          if (cnd_broadcast (&lock->waiting_readers) != thrd_success)
+            {
+              mtx_unlock (&lock->lock);
+              return EINVAL;
+            }
+        }
+    }
+  if (mtx_unlock (&lock->lock) != thrd_success)
+    return EINVAL;
+  return 0;
+}
+
+int
+glthread_rwlock_destroy (gl_rwlock_t *lock)
+{
+  if (lock->init_needed)
+    call_once (&lock->init_once, lock->init_func);
+  mtx_destroy (&lock->lock);
+  cnd_destroy (&lock->waiting_readers);
+  cnd_destroy (&lock->waiting_writers);
+  return 0;
+}
+
+/* --------------------- gl_recursive_lock_t datatype --------------------- */
+
+int
+glthread_recursive_lock_init (gl_recursive_lock_t *lock)
+{
+  if (mtx_init (&lock->mutex, mtx_plain | mtx_recursive) != thrd_success)
+    return ENOMEM;
+  lock->init_needed = 0;
+  return 0;
+}
+
+int
+glthread_recursive_lock_lock (gl_recursive_lock_t *lock)
+{
+  if (lock->init_needed)
+    call_once (&lock->init_once, lock->init_func);
+  if (mtx_lock (&lock->mutex) != thrd_success)
+    return EAGAIN;
+  return 0;
+}
+
+int
+glthread_recursive_lock_unlock (gl_recursive_lock_t *lock)
+{
+  if (lock->init_needed)
+    call_once (&lock->init_once, lock->init_func);
+  if (mtx_unlock (&lock->mutex) != thrd_success)
+    return EINVAL;
+  return 0;
+}
+
+int
+glthread_recursive_lock_destroy (gl_recursive_lock_t *lock)
+{
+  if (lock->init_needed)
+    call_once (&lock->init_once, lock->init_func);
+  mtx_destroy (&lock->mutex);
+  return 0;
+}
+
+/* -------------------------- gl_once_t datatype -------------------------- */
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_POSIX_THREADS
+
+/* -------------------------- gl_lock_t datatype -------------------------- */
+
+/* ------------------------- gl_rwlock_t datatype ------------------------- */
+
+# if HAVE_PTHREAD_RWLOCK && (HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER || (defined PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP && (__GNU_LIBRARY__ > 1)))
+
+#  if defined PTHREAD_RWLOCK_INITIALIZER || defined PTHREAD_RWLOCK_INITIALIZER_NP
+
+#   if !HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER
+     /* glibc with bug https://sourceware.org/bugzilla/show_bug.cgi?id=13701 */
+
+int
+glthread_rwlock_init_for_glibc (pthread_rwlock_t *lock)
+{
+  pthread_rwlockattr_t attributes;
+  int err;
+
+  err = pthread_rwlockattr_init (&attributes);
+  if (err != 0)
+    return err;
+  /* Note: PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP is the only value that
+     causes the writer to be preferred. PTHREAD_RWLOCK_PREFER_WRITER_NP does not
+     do this; see
+     http://man7.org/linux/man-pages/man3/pthread_rwlockattr_setkind_np.3.html */
+  err = pthread_rwlockattr_setkind_np (&attributes,
+                                       PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP);
+  if (err == 0)
+    err = pthread_rwlock_init(lock, &attributes);
+  /* pthread_rwlockattr_destroy always returns 0.  It cannot influence the
+     return value.  */
+  pthread_rwlockattr_destroy (&attributes);
+  return err;
+}
+
+#   endif
+#  else
+
+int
+glthread_rwlock_init_multithreaded (gl_rwlock_t *lock)
+{
+  int err;
+
+  err = pthread_rwlock_init (&lock->rwlock, NULL);
+  if (err != 0)
+    return err;
+  lock->initialized = 1;
+  return 0;
+}
+
+int
+glthread_rwlock_rdlock_multithreaded (gl_rwlock_t *lock)
+{
+  if (!lock->initialized)
+    {
+      int err;
+
+      err = pthread_mutex_lock (&lock->guard);
+      if (err != 0)
+        return err;
+      if (!lock->initialized)
+        {
+          err = glthread_rwlock_init_multithreaded (lock);
+          if (err != 0)
+            {
+              pthread_mutex_unlock (&lock->guard);
+              return err;
+            }
+        }
+      err = pthread_mutex_unlock (&lock->guard);
+      if (err != 0)
+        return err;
+    }
+  return pthread_rwlock_rdlock (&lock->rwlock);
+}
+
+int
+glthread_rwlock_wrlock_multithreaded (gl_rwlock_t *lock)
+{
+  if (!lock->initialized)
+    {
+      int err;
+
+      err = pthread_mutex_lock (&lock->guard);
+      if (err != 0)
+        return err;
+      if (!lock->initialized)
+        {
+          err = glthread_rwlock_init_multithreaded (lock);
+          if (err != 0)
+            {
+              pthread_mutex_unlock (&lock->guard);
+              return err;
+            }
+        }
+      err = pthread_mutex_unlock (&lock->guard);
+      if (err != 0)
+        return err;
+    }
+  return pthread_rwlock_wrlock (&lock->rwlock);
+}
+
+int
+glthread_rwlock_unlock_multithreaded (gl_rwlock_t *lock)
+{
+  if (!lock->initialized)
+    return EINVAL;
+  return pthread_rwlock_unlock (&lock->rwlock);
+}
+
+int
+glthread_rwlock_destroy_multithreaded (gl_rwlock_t *lock)
+{
+  int err;
+
+  if (!lock->initialized)
+    return EINVAL;
+  err = pthread_rwlock_destroy (&lock->rwlock);
+  if (err != 0)
+    return err;
+  lock->initialized = 0;
+  return 0;
+}
+
+#  endif
+
+# else
+
+int
+glthread_rwlock_init_multithreaded (gl_rwlock_t *lock)
+{
+  int err;
+
+  err = pthread_mutex_init (&lock->lock, NULL);
+  if (err != 0)
+    return err;
+  err = pthread_cond_init (&lock->waiting_readers, NULL);
+  if (err != 0)
+    return err;
+  err = pthread_cond_init (&lock->waiting_writers, NULL);
+  if (err != 0)
+    return err;
+  lock->waiting_writers_count = 0;
+  lock->runcount = 0;
+  return 0;
+}
+
+int
+glthread_rwlock_rdlock_multithreaded (gl_rwlock_t *lock)
+{
+  int err;
+
+  err = pthread_mutex_lock (&lock->lock);
+  if (err != 0)
+    return err;
+  /* Test whether only readers are currently running, and whether the runcount
+     field will not overflow, and whether no writer is waiting.  The latter
+     condition is because POSIX recommends that "write locks shall take
+     precedence over read locks", to avoid "writer starvation".  */
+  while (!(lock->runcount + 1 > 0 && lock->waiting_writers_count == 0))
+    {
+      /* This thread has to wait for a while.  Enqueue it among the
+         waiting_readers.  */
+      err = pthread_cond_wait (&lock->waiting_readers, &lock->lock);
+      if (err != 0)
+        {
+          pthread_mutex_unlock (&lock->lock);
+          return err;
+        }
+    }
+  lock->runcount++;
+  return pthread_mutex_unlock (&lock->lock);
+}
+
+int
+glthread_rwlock_wrlock_multithreaded (gl_rwlock_t *lock)
+{
+  int err;
+
+  err = pthread_mutex_lock (&lock->lock);
+  if (err != 0)
+    return err;
+  /* Test whether no readers or writers are currently running.  */
+  while (!(lock->runcount == 0))
+    {
+      /* This thread has to wait for a while.  Enqueue it among the
+         waiting_writers.  */
+      lock->waiting_writers_count++;
+      err = pthread_cond_wait (&lock->waiting_writers, &lock->lock);
+      if (err != 0)
+        {
+          lock->waiting_writers_count--;
+          pthread_mutex_unlock (&lock->lock);
+          return err;
+        }
+      lock->waiting_writers_count--;
+    }
+  lock->runcount--; /* runcount becomes -1 */
+  return pthread_mutex_unlock (&lock->lock);
+}
+
+int
+glthread_rwlock_unlock_multithreaded (gl_rwlock_t *lock)
+{
+  int err;
+
+  err = pthread_mutex_lock (&lock->lock);
+  if (err != 0)
+    return err;
+  if (lock->runcount < 0)
+    {
+      /* Drop a writer lock.  */
+      if (!(lock->runcount == -1))
+        {
+          pthread_mutex_unlock (&lock->lock);
+          return EINVAL;
+        }
+      lock->runcount = 0;
+    }
+  else
+    {
+      /* Drop a reader lock.  */
+      if (!(lock->runcount > 0))
+        {
+          pthread_mutex_unlock (&lock->lock);
+          return EINVAL;
+        }
+      lock->runcount--;
+    }
+  if (lock->runcount == 0)
+    {
+      /* POSIX recommends that "write locks shall take precedence over read
+         locks", to avoid "writer starvation".  */
+      if (lock->waiting_writers_count > 0)
+        {
+          /* Wake up one of the waiting writers.  */
+          err = pthread_cond_signal (&lock->waiting_writers);
+          if (err != 0)
+            {
+              pthread_mutex_unlock (&lock->lock);
+              return err;
+            }
+        }
+      else
+        {
+          /* Wake up all waiting readers.  */
+          err = pthread_cond_broadcast (&lock->waiting_readers);
+          if (err != 0)
+            {
+              pthread_mutex_unlock (&lock->lock);
+              return err;
+            }
+        }
+    }
+  return pthread_mutex_unlock (&lock->lock);
+}
+
+int
+glthread_rwlock_destroy_multithreaded (gl_rwlock_t *lock)
+{
+  int err;
+
+  err = pthread_mutex_destroy (&lock->lock);
+  if (err != 0)
+    return err;
+  err = pthread_cond_destroy (&lock->waiting_readers);
+  if (err != 0)
+    return err;
+  err = pthread_cond_destroy (&lock->waiting_writers);
+  if (err != 0)
+    return err;
+  return 0;
+}
+
+# endif
+
+/* --------------------- gl_recursive_lock_t datatype --------------------- */
+
+# if HAVE_PTHREAD_MUTEX_RECURSIVE
+
+#  if defined PTHREAD_RECURSIVE_MUTEX_INITIALIZER || defined PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
+
+int
+glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock)
+{
+  pthread_mutexattr_t attributes;
+  int err;
+
+  err = pthread_mutexattr_init (&attributes);
+  if (err != 0)
+    return err;
+  err = pthread_mutexattr_settype (&attributes, PTHREAD_MUTEX_RECURSIVE);
+  if (err != 0)
+    {
+      pthread_mutexattr_destroy (&attributes);
+      return err;
+    }
+  err = pthread_mutex_init (lock, &attributes);
+  if (err != 0)
+    {
+      pthread_mutexattr_destroy (&attributes);
+      return err;
+    }
+  err = pthread_mutexattr_destroy (&attributes);
+  if (err != 0)
+    return err;
+  return 0;
+}
+
+#  else
+
+int
+glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock)
+{
+  pthread_mutexattr_t attributes;
+  int err;
+
+  err = pthread_mutexattr_init (&attributes);
+  if (err != 0)
+    return err;
+  err = pthread_mutexattr_settype (&attributes, PTHREAD_MUTEX_RECURSIVE);
+  if (err != 0)
+    {
+      pthread_mutexattr_destroy (&attributes);
+      return err;
+    }
+  err = pthread_mutex_init (&lock->recmutex, &attributes);
+  if (err != 0)
+    {
+      pthread_mutexattr_destroy (&attributes);
+      return err;
+    }
+  err = pthread_mutexattr_destroy (&attributes);
+  if (err != 0)
+    return err;
+  lock->initialized = 1;
+  return 0;
+}
+
+int
+glthread_recursive_lock_lock_multithreaded (gl_recursive_lock_t *lock)
+{
+  if (!lock->initialized)
+    {
+      int err;
+
+      err = pthread_mutex_lock (&lock->guard);
+      if (err != 0)
+        return err;
+      if (!lock->initialized)
+        {
+          err = glthread_recursive_lock_init_multithreaded (lock);
+          if (err != 0)
+            {
+              pthread_mutex_unlock (&lock->guard);
+              return err;
+            }
+        }
+      err = pthread_mutex_unlock (&lock->guard);
+      if (err != 0)
+        return err;
+    }
+  return pthread_mutex_lock (&lock->recmutex);
+}
+
+int
+glthread_recursive_lock_unlock_multithreaded (gl_recursive_lock_t *lock)
+{
+  if (!lock->initialized)
+    return EINVAL;
+  return pthread_mutex_unlock (&lock->recmutex);
+}
+
+int
+glthread_recursive_lock_destroy_multithreaded (gl_recursive_lock_t *lock)
+{
+  int err;
+
+  if (!lock->initialized)
+    return EINVAL;
+  err = pthread_mutex_destroy (&lock->recmutex);
+  if (err != 0)
+    return err;
+  lock->initialized = 0;
+  return 0;
+}
+
+#  endif
+
+# else
+
+int
+glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock)
+{
+  int err;
+
+  err = pthread_mutex_init (&lock->mutex, NULL);
+  if (err != 0)
+    return err;
+  lock->owner = (pthread_t) 0;
+  lock->depth = 0;
+  return 0;
+}
+
+int
+glthread_recursive_lock_lock_multithreaded (gl_recursive_lock_t *lock)
+{
+  pthread_t self = pthread_self ();
+  if (lock->owner != self)
+    {
+      int err;
+
+      err = pthread_mutex_lock (&lock->mutex);
+      if (err != 0)
+        return err;
+      lock->owner = self;
+    }
+  if (++(lock->depth) == 0) /* wraparound? */
+    {
+      lock->depth--;
+      return EAGAIN;
+    }
+  return 0;
+}
+
+int
+glthread_recursive_lock_unlock_multithreaded (gl_recursive_lock_t *lock)
+{
+  if (lock->owner != pthread_self ())
+    return EPERM;
+  if (lock->depth == 0)
+    return EINVAL;
+  if (--(lock->depth) == 0)
+    {
+      lock->owner = (pthread_t) 0;
+      return pthread_mutex_unlock (&lock->mutex);
+    }
+  else
+    return 0;
+}
+
+int
+glthread_recursive_lock_destroy_multithreaded (gl_recursive_lock_t *lock)
+{
+  if (lock->owner != (pthread_t) 0)
+    return EBUSY;
+  return pthread_mutex_destroy (&lock->mutex);
+}
+
+# endif
+
+/* -------------------------- gl_once_t datatype -------------------------- */
+
+static const pthread_once_t fresh_once = PTHREAD_ONCE_INIT;
+
+int
+glthread_once_singlethreaded (pthread_once_t *once_control)
+{
+  /* We don't know whether pthread_once_t is an integer type, a floating-point
+     type, a pointer type, or a structure type.  */
+  char *firstbyte = (char *)once_control;
+  if (*firstbyte == *(const char *)&fresh_once)
+    {
+      /* First time use of once_control.  Invert the first byte.  */
+      *firstbyte = ~ *(const char *)&fresh_once;
+      return 1;
+    }
+  else
+    return 0;
+}
+
+# if !(PTHREAD_IN_USE_DETECTION_HARD || USE_POSIX_THREADS_WEAK)
+
+int
+glthread_once_multithreaded (pthread_once_t *once_control,
+                             void (*init_function) (void))
+{
+  int err = pthread_once (once_control, init_function);
+  if (err == ENOSYS)
+    {
+      /* This happens on FreeBSD 11: The pthread_once function in libc returns
+         ENOSYS.  */
+      if (glthread_once_singlethreaded (once_control))
+        init_function ();
+      return 0;
+    }
+  return err;
+}
+
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_WINDOWS_THREADS
+
+#endif
+
+/* ========================================================================= */
diff --git a/src/grep/lib/glthread/lock.h b/src/grep/lib/glthread/lock.h
new file mode 100644
index 0000000..cc4c519
--- /dev/null
+++ b/src/grep/lib/glthread/lock.h
@@ -0,0 +1,791 @@
+/* Locking in multithreaded situations.
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-posix.h, gthr-posix95.h, gthr-win32.h.  */
+
+/* This file contains locking primitives for use with a given thread library.
+   It does not contain primitives for creating threads or for other
+   synchronization primitives.
+
+   Normal (non-recursive) locks:
+     Type:                gl_lock_t
+     Declaration:         gl_lock_define(extern, name)
+     Initializer:         gl_lock_define_initialized(, name)
+     Initialization:      gl_lock_init (name);
+     Taking the lock:     gl_lock_lock (name);
+     Releasing the lock:  gl_lock_unlock (name);
+     De-initialization:   gl_lock_destroy (name);
+   Equivalent functions with control of error handling:
+     Initialization:      err = glthread_lock_init (&name);
+     Taking the lock:     err = glthread_lock_lock (&name);
+     Releasing the lock:  err = glthread_lock_unlock (&name);
+     De-initialization:   err = glthread_lock_destroy (&name);
+
+   Read-Write (non-recursive) locks:
+     Type:                gl_rwlock_t
+     Declaration:         gl_rwlock_define(extern, name)
+     Initializer:         gl_rwlock_define_initialized(, name)
+     Initialization:      gl_rwlock_init (name);
+     Taking the lock:     gl_rwlock_rdlock (name);
+                          gl_rwlock_wrlock (name);
+     Releasing the lock:  gl_rwlock_unlock (name);
+     De-initialization:   gl_rwlock_destroy (name);
+   Equivalent functions with control of error handling:
+     Initialization:      err = glthread_rwlock_init (&name);
+     Taking the lock:     err = glthread_rwlock_rdlock (&name);
+                          err = glthread_rwlock_wrlock (&name);
+     Releasing the lock:  err = glthread_rwlock_unlock (&name);
+     De-initialization:   err = glthread_rwlock_destroy (&name);
+
+   Recursive locks:
+     Type:                gl_recursive_lock_t
+     Declaration:         gl_recursive_lock_define(extern, name)
+     Initializer:         gl_recursive_lock_define_initialized(, name)
+     Initialization:      gl_recursive_lock_init (name);
+     Taking the lock:     gl_recursive_lock_lock (name);
+     Releasing the lock:  gl_recursive_lock_unlock (name);
+     De-initialization:   gl_recursive_lock_destroy (name);
+   Equivalent functions with control of error handling:
+     Initialization:      err = glthread_recursive_lock_init (&name);
+     Taking the lock:     err = glthread_recursive_lock_lock (&name);
+     Releasing the lock:  err = glthread_recursive_lock_unlock (&name);
+     De-initialization:   err = glthread_recursive_lock_destroy (&name);
+
+  Once-only execution:
+     Type:                gl_once_t
+     Initializer:         gl_once_define(extern, name)
+     Execution:           gl_once (name, initfunction);
+   Equivalent functions with control of error handling:
+     Execution:           err = glthread_once (&name, initfunction);
+*/
+
+
+#ifndef _LOCK_H
+#define _LOCK_H
+
+#include <errno.h>
+#include <stdlib.h>
+
+#if !defined c11_threads_in_use
+# if HAVE_THREADS_H && USE_POSIX_THREADS_FROM_LIBC
+#  define c11_threads_in_use() 1
+# elif HAVE_THREADS_H && USE_POSIX_THREADS_WEAK
+#  include <threads.h>
+#  pragma weak thrd_exit
+#  define c11_threads_in_use() (thrd_exit != NULL)
+# else
+#  define c11_threads_in_use() 0
+# endif
+#endif
+
+/* ========================================================================= */
+
+#if USE_ISOC_THREADS || USE_ISOC_AND_POSIX_THREADS
+
+/* Use the ISO C threads library.  */
+
+# include <threads.h>
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+/* -------------------------- gl_lock_t datatype -------------------------- */
+
+typedef struct
+        {
+          int volatile init_needed;
+          once_flag init_once;
+          void (*init_func) (void);
+          mtx_t mutex;
+        }
+        gl_lock_t;
+# define gl_lock_define(STORAGECLASS, NAME) \
+    STORAGECLASS gl_lock_t NAME;
+# define gl_lock_define_initialized(STORAGECLASS, NAME) \
+    static void _atomic_init_##NAME (void);       \
+    STORAGECLASS gl_lock_t NAME =                 \
+      { 1, ONCE_FLAG_INIT, _atomic_init_##NAME }; \
+    static void _atomic_init_##NAME (void)        \
+    {                                             \
+      if (glthread_lock_init (&(NAME)))           \
+        abort ();                                 \
+    }
+extern int glthread_lock_init (gl_lock_t *lock);
+extern int glthread_lock_lock (gl_lock_t *lock);
+extern int glthread_lock_unlock (gl_lock_t *lock);
+extern int glthread_lock_destroy (gl_lock_t *lock);
+
+/* ------------------------- gl_rwlock_t datatype ------------------------- */
+
+typedef struct
+        {
+          int volatile init_needed;
+          once_flag init_once;
+          void (*init_func) (void);
+          mtx_t lock; /* protects the remaining fields */
+          cnd_t waiting_readers; /* waiting readers */
+          cnd_t waiting_writers; /* waiting writers */
+          unsigned int waiting_writers_count; /* number of waiting writers */
+          int runcount; /* number of readers running, or -1 when a writer runs */
+        }
+        gl_rwlock_t;
+# define gl_rwlock_define(STORAGECLASS, NAME) \
+    STORAGECLASS gl_rwlock_t NAME;
+# define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
+    static void _atomic_init_##NAME (void);       \
+    STORAGECLASS gl_rwlock_t NAME =               \
+      { 1, ONCE_FLAG_INIT, _atomic_init_##NAME }; \
+    static void _atomic_init_##NAME (void)        \
+    {                                             \
+      if (glthread_rwlock_init (&(NAME)))         \
+        abort ();                                 \
+    }
+extern int glthread_rwlock_init (gl_rwlock_t *lock);
+extern int glthread_rwlock_rdlock (gl_rwlock_t *lock);
+extern int glthread_rwlock_wrlock (gl_rwlock_t *lock);
+extern int glthread_rwlock_unlock (gl_rwlock_t *lock);
+extern int glthread_rwlock_destroy (gl_rwlock_t *lock);
+
+/* --------------------- gl_recursive_lock_t datatype --------------------- */
+
+typedef struct
+        {
+          int volatile init_needed;
+          once_flag init_once;
+          void (*init_func) (void);
+          mtx_t mutex;
+        }
+        gl_recursive_lock_t;
+# define gl_recursive_lock_define(STORAGECLASS, NAME) \
+    STORAGECLASS gl_recursive_lock_t NAME;
+# define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
+    static void _atomic_init_##NAME (void);       \
+    STORAGECLASS gl_recursive_lock_t NAME =       \
+      { 1, ONCE_FLAG_INIT, _atomic_init_##NAME }; \
+    static void _atomic_init_##NAME (void)        \
+    {                                             \
+      if (glthread_recursive_lock_init (&(NAME))) \
+        abort ();                                 \
+    }
+extern int glthread_recursive_lock_init (gl_recursive_lock_t *lock);
+extern int glthread_recursive_lock_lock (gl_recursive_lock_t *lock);
+extern int glthread_recursive_lock_unlock (gl_recursive_lock_t *lock);
+extern int glthread_recursive_lock_destroy (gl_recursive_lock_t *lock);
+
+/* -------------------------- gl_once_t datatype -------------------------- */
+
+typedef once_flag gl_once_t;
+# define gl_once_define(STORAGECLASS, NAME) \
+    STORAGECLASS once_flag NAME = ONCE_FLAG_INIT;
+# define glthread_once(ONCE_CONTROL, INITFUNCTION) \
+    (call_once (ONCE_CONTROL, INITFUNCTION), 0)
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_POSIX_THREADS
+
+/* Use the POSIX threads library.  */
+
+# include <pthread.h>
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+# if PTHREAD_IN_USE_DETECTION_HARD
+
+/* The pthread_in_use() detection needs to be done at runtime.  */
+#  define pthread_in_use() \
+     glthread_in_use ()
+extern int glthread_in_use (void);
+
+# endif
+
+# if USE_POSIX_THREADS_WEAK
+
+/* Use weak references to the POSIX threads library.  */
+
+/* Weak references avoid dragging in external libraries if the other parts
+   of the program don't use them.  Here we use them, because we don't want
+   every program that uses libintl to depend on libpthread.  This assumes
+   that libpthread would not be loaded after libintl; i.e. if libintl is
+   loaded first, by an executable that does not depend on libpthread, and
+   then a module is dynamically loaded that depends on libpthread, libintl
+   will not be multithread-safe.  */
+
+/* The way to test at runtime whether libpthread is present is to test
+   whether a function pointer's value, such as &pthread_mutex_init, is
+   non-NULL.  However, some versions of GCC have a bug through which, in
+   PIC mode, &foo != NULL always evaluates to true if there is a direct
+   call to foo(...) in the same function.  To avoid this, we test the
+   address of a function in libpthread that we don't use.  */
+
+#  pragma weak pthread_mutex_init
+#  pragma weak pthread_mutex_lock
+#  pragma weak pthread_mutex_unlock
+#  pragma weak pthread_mutex_destroy
+#  pragma weak pthread_rwlock_init
+#  pragma weak pthread_rwlock_rdlock
+#  pragma weak pthread_rwlock_wrlock
+#  pragma weak pthread_rwlock_unlock
+#  pragma weak pthread_rwlock_destroy
+#  pragma weak pthread_once
+#  pragma weak pthread_cond_init
+#  pragma weak pthread_cond_wait
+#  pragma weak pthread_cond_signal
+#  pragma weak pthread_cond_broadcast
+#  pragma weak pthread_cond_destroy
+#  pragma weak pthread_mutexattr_init
+#  pragma weak pthread_mutexattr_settype
+#  pragma weak pthread_mutexattr_destroy
+#  pragma weak pthread_rwlockattr_init
+#  if __GNU_LIBRARY__ > 1
+#   pragma weak pthread_rwlockattr_setkind_np
+#  endif
+#  pragma weak pthread_rwlockattr_destroy
+#  ifndef pthread_self
+#   pragma weak pthread_self
+#  endif
+
+#  if !PTHREAD_IN_USE_DETECTION_HARD
+    /* Considering all platforms with USE_POSIX_THREADS_WEAK, only few symbols
+       can be used to determine whether libpthread is in use.  These are:
+         pthread_mutexattr_gettype
+         pthread_rwlockattr_destroy
+         pthread_rwlockattr_init
+     */
+#   pragma weak pthread_mutexattr_gettype
+#   define pthread_in_use() \
+      (pthread_mutexattr_gettype != NULL || c11_threads_in_use ())
+#  endif
+
+# else
+
+#  if !PTHREAD_IN_USE_DETECTION_HARD
+#   define pthread_in_use() 1
+#  endif
+
+# endif
+
+/* -------------------------- gl_lock_t datatype -------------------------- */
+
+typedef pthread_mutex_t gl_lock_t;
+# define gl_lock_define(STORAGECLASS, NAME) \
+    STORAGECLASS pthread_mutex_t NAME;
+# define gl_lock_define_initialized(STORAGECLASS, NAME) \
+    STORAGECLASS pthread_mutex_t NAME = gl_lock_initializer;
+# define gl_lock_initializer \
+    PTHREAD_MUTEX_INITIALIZER
+# define glthread_lock_init(LOCK) \
+    (pthread_in_use () ? pthread_mutex_init (LOCK, NULL) : 0)
+# define glthread_lock_lock(LOCK) \
+    (pthread_in_use () ? pthread_mutex_lock (LOCK) : 0)
+# define glthread_lock_unlock(LOCK) \
+    (pthread_in_use () ? pthread_mutex_unlock (LOCK) : 0)
+# define glthread_lock_destroy(LOCK) \
+    (pthread_in_use () ? pthread_mutex_destroy (LOCK) : 0)
+
+/* ------------------------- gl_rwlock_t datatype ------------------------- */
+
+# if HAVE_PTHREAD_RWLOCK && (HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER || (defined PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP && (__GNU_LIBRARY__ > 1)))
+
+#  if defined PTHREAD_RWLOCK_INITIALIZER || defined PTHREAD_RWLOCK_INITIALIZER_NP
+
+typedef pthread_rwlock_t gl_rwlock_t;
+#   define gl_rwlock_define(STORAGECLASS, NAME) \
+      STORAGECLASS pthread_rwlock_t NAME;
+#   define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
+      STORAGECLASS pthread_rwlock_t NAME = gl_rwlock_initializer;
+#   if HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER
+#    if defined PTHREAD_RWLOCK_INITIALIZER
+#     define gl_rwlock_initializer \
+        PTHREAD_RWLOCK_INITIALIZER
+#    else
+#     define gl_rwlock_initializer \
+        PTHREAD_RWLOCK_INITIALIZER_NP
+#    endif
+#    define glthread_rwlock_init(LOCK) \
+       (pthread_in_use () ? pthread_rwlock_init (LOCK, NULL) : 0)
+#   else /* glibc with bug https://sourceware.org/bugzilla/show_bug.cgi?id=13701 */
+#    define gl_rwlock_initializer \
+       PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP
+#    define glthread_rwlock_init(LOCK) \
+       (pthread_in_use () ? glthread_rwlock_init_for_glibc (LOCK) : 0)
+extern int glthread_rwlock_init_for_glibc (pthread_rwlock_t *lock);
+#   endif
+#   define glthread_rwlock_rdlock(LOCK) \
+      (pthread_in_use () ? pthread_rwlock_rdlock (LOCK) : 0)
+#   define glthread_rwlock_wrlock(LOCK) \
+      (pthread_in_use () ? pthread_rwlock_wrlock (LOCK) : 0)
+#   define glthread_rwlock_unlock(LOCK) \
+      (pthread_in_use () ? pthread_rwlock_unlock (LOCK) : 0)
+#   define glthread_rwlock_destroy(LOCK) \
+      (pthread_in_use () ? pthread_rwlock_destroy (LOCK) : 0)
+
+#  else
+
+typedef struct
+        {
+          int initialized;
+          pthread_mutex_t guard;   /* protects the initialization */
+          pthread_rwlock_t rwlock; /* read-write lock */
+        }
+        gl_rwlock_t;
+#   define gl_rwlock_define(STORAGECLASS, NAME) \
+      STORAGECLASS gl_rwlock_t NAME;
+#   define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
+      STORAGECLASS gl_rwlock_t NAME = gl_rwlock_initializer;
+#   define gl_rwlock_initializer \
+      { 0, PTHREAD_MUTEX_INITIALIZER }
+#   define glthread_rwlock_init(LOCK) \
+      (pthread_in_use () ? glthread_rwlock_init_multithreaded (LOCK) : 0)
+#   define glthread_rwlock_rdlock(LOCK) \
+      (pthread_in_use () ? glthread_rwlock_rdlock_multithreaded (LOCK) : 0)
+#   define glthread_rwlock_wrlock(LOCK) \
+      (pthread_in_use () ? glthread_rwlock_wrlock_multithreaded (LOCK) : 0)
+#   define glthread_rwlock_unlock(LOCK) \
+      (pthread_in_use () ? glthread_rwlock_unlock_multithreaded (LOCK) : 0)
+#   define glthread_rwlock_destroy(LOCK) \
+      (pthread_in_use () ? glthread_rwlock_destroy_multithreaded (LOCK) : 0)
+extern int glthread_rwlock_init_multithreaded (gl_rwlock_t *lock);
+extern int glthread_rwlock_rdlock_multithreaded (gl_rwlock_t *lock);
+extern int glthread_rwlock_wrlock_multithreaded (gl_rwlock_t *lock);
+extern int glthread_rwlock_unlock_multithreaded (gl_rwlock_t *lock);
+extern int glthread_rwlock_destroy_multithreaded (gl_rwlock_t *lock);
+
+#  endif
+
+# else
+
+typedef struct
+        {
+          pthread_mutex_t lock; /* protects the remaining fields */
+          pthread_cond_t waiting_readers; /* waiting readers */
+          pthread_cond_t waiting_writers; /* waiting writers */
+          unsigned int waiting_writers_count; /* number of waiting writers */
+          int runcount; /* number of readers running, or -1 when a writer runs */
+        }
+        gl_rwlock_t;
+# define gl_rwlock_define(STORAGECLASS, NAME) \
+    STORAGECLASS gl_rwlock_t NAME;
+# define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
+    STORAGECLASS gl_rwlock_t NAME = gl_rwlock_initializer;
+# define gl_rwlock_initializer \
+    { PTHREAD_MUTEX_INITIALIZER, PTHREAD_COND_INITIALIZER, PTHREAD_COND_INITIALIZER, 0, 0 }
+# define glthread_rwlock_init(LOCK) \
+    (pthread_in_use () ? glthread_rwlock_init_multithreaded (LOCK) : 0)
+# define glthread_rwlock_rdlock(LOCK) \
+    (pthread_in_use () ? glthread_rwlock_rdlock_multithreaded (LOCK) : 0)
+# define glthread_rwlock_wrlock(LOCK) \
+    (pthread_in_use () ? glthread_rwlock_wrlock_multithreaded (LOCK) : 0)
+# define glthread_rwlock_unlock(LOCK) \
+    (pthread_in_use () ? glthread_rwlock_unlock_multithreaded (LOCK) : 0)
+# define glthread_rwlock_destroy(LOCK) \
+    (pthread_in_use () ? glthread_rwlock_destroy_multithreaded (LOCK) : 0)
+extern int glthread_rwlock_init_multithreaded (gl_rwlock_t *lock);
+extern int glthread_rwlock_rdlock_multithreaded (gl_rwlock_t *lock);
+extern int glthread_rwlock_wrlock_multithreaded (gl_rwlock_t *lock);
+extern int glthread_rwlock_unlock_multithreaded (gl_rwlock_t *lock);
+extern int glthread_rwlock_destroy_multithreaded (gl_rwlock_t *lock);
+
+# endif
+
+/* --------------------- gl_recursive_lock_t datatype --------------------- */
+
+# if HAVE_PTHREAD_MUTEX_RECURSIVE
+
+#  if defined PTHREAD_RECURSIVE_MUTEX_INITIALIZER || defined PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
+
+typedef pthread_mutex_t gl_recursive_lock_t;
+#   define gl_recursive_lock_define(STORAGECLASS, NAME) \
+      STORAGECLASS pthread_mutex_t NAME;
+#   define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
+      STORAGECLASS pthread_mutex_t NAME = gl_recursive_lock_initializer;
+#   ifdef PTHREAD_RECURSIVE_MUTEX_INITIALIZER
+#    define gl_recursive_lock_initializer \
+       PTHREAD_RECURSIVE_MUTEX_INITIALIZER
+#   else
+#    define gl_recursive_lock_initializer \
+       PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
+#   endif
+#   define glthread_recursive_lock_init(LOCK) \
+      (pthread_in_use () ? glthread_recursive_lock_init_multithreaded (LOCK) : 0)
+#   define glthread_recursive_lock_lock(LOCK) \
+      (pthread_in_use () ? pthread_mutex_lock (LOCK) : 0)
+#   define glthread_recursive_lock_unlock(LOCK) \
+      (pthread_in_use () ? pthread_mutex_unlock (LOCK) : 0)
+#   define glthread_recursive_lock_destroy(LOCK) \
+      (pthread_in_use () ? pthread_mutex_destroy (LOCK) : 0)
+extern int glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock);
+
+#  else
+
+typedef struct
+        {
+          pthread_mutex_t recmutex; /* recursive mutex */
+          pthread_mutex_t guard;    /* protects the initialization */
+          int initialized;
+        }
+        gl_recursive_lock_t;
+#   define gl_recursive_lock_define(STORAGECLASS, NAME) \
+      STORAGECLASS gl_recursive_lock_t NAME;
+#   define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
+      STORAGECLASS gl_recursive_lock_t NAME = gl_recursive_lock_initializer;
+#   define gl_recursive_lock_initializer \
+      { PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, 0 }
+#   define glthread_recursive_lock_init(LOCK) \
+      (pthread_in_use () ? glthread_recursive_lock_init_multithreaded (LOCK) : 0)
+#   define glthread_recursive_lock_lock(LOCK) \
+      (pthread_in_use () ? glthread_recursive_lock_lock_multithreaded (LOCK) : 0)
+#   define glthread_recursive_lock_unlock(LOCK) \
+      (pthread_in_use () ? glthread_recursive_lock_unlock_multithreaded (LOCK) : 0)
+#   define glthread_recursive_lock_destroy(LOCK) \
+      (pthread_in_use () ? glthread_recursive_lock_destroy_multithreaded (LOCK) : 0)
+extern int glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock);
+extern int glthread_recursive_lock_lock_multithreaded (gl_recursive_lock_t *lock);
+extern int glthread_recursive_lock_unlock_multithreaded (gl_recursive_lock_t *lock);
+extern int glthread_recursive_lock_destroy_multithreaded (gl_recursive_lock_t *lock);
+
+#  endif
+
+# else
+
+/* Old versions of POSIX threads on Solaris did not have recursive locks.
+   We have to implement them ourselves.  */
+
+typedef struct
+        {
+          pthread_mutex_t mutex;
+          pthread_t owner;
+          unsigned long depth;
+        }
+        gl_recursive_lock_t;
+#  define gl_recursive_lock_define(STORAGECLASS, NAME) \
+     STORAGECLASS gl_recursive_lock_t NAME;
+#  define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
+     STORAGECLASS gl_recursive_lock_t NAME = gl_recursive_lock_initializer;
+#  define gl_recursive_lock_initializer \
+     { PTHREAD_MUTEX_INITIALIZER, (pthread_t) 0, 0 }
+#  define glthread_recursive_lock_init(LOCK) \
+     (pthread_in_use () ? glthread_recursive_lock_init_multithreaded (LOCK) : 0)
+#  define glthread_recursive_lock_lock(LOCK) \
+     (pthread_in_use () ? glthread_recursive_lock_lock_multithreaded (LOCK) : 0)
+#  define glthread_recursive_lock_unlock(LOCK) \
+     (pthread_in_use () ? glthread_recursive_lock_unlock_multithreaded (LOCK) : 0)
+#  define glthread_recursive_lock_destroy(LOCK) \
+     (pthread_in_use () ? glthread_recursive_lock_destroy_multithreaded (LOCK) : 0)
+extern int glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock);
+extern int glthread_recursive_lock_lock_multithreaded (gl_recursive_lock_t *lock);
+extern int glthread_recursive_lock_unlock_multithreaded (gl_recursive_lock_t *lock);
+extern int glthread_recursive_lock_destroy_multithreaded (gl_recursive_lock_t *lock);
+
+# endif
+
+/* -------------------------- gl_once_t datatype -------------------------- */
+
+typedef pthread_once_t gl_once_t;
+# define gl_once_define(STORAGECLASS, NAME) \
+    STORAGECLASS pthread_once_t NAME = PTHREAD_ONCE_INIT;
+# if PTHREAD_IN_USE_DETECTION_HARD || USE_POSIX_THREADS_WEAK
+#  define glthread_once(ONCE_CONTROL, INITFUNCTION) \
+     (pthread_in_use ()                                                        \
+      ? pthread_once (ONCE_CONTROL, INITFUNCTION)                              \
+      : (glthread_once_singlethreaded (ONCE_CONTROL) ? (INITFUNCTION (), 0) : 0))
+# else
+#  define glthread_once(ONCE_CONTROL, INITFUNCTION) \
+     (pthread_in_use ()                                                        \
+      ? glthread_once_multithreaded (ONCE_CONTROL, INITFUNCTION)               \
+      : (glthread_once_singlethreaded (ONCE_CONTROL) ? (INITFUNCTION (), 0) : 0))
+extern int glthread_once_multithreaded (pthread_once_t *once_control,
+                                        void (*init_function) (void));
+# endif
+extern int glthread_once_singlethreaded (pthread_once_t *once_control);
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_WINDOWS_THREADS
+
+# define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+# include <windows.h>
+
+# include "windows-mutex.h"
+# include "windows-rwlock.h"
+# include "windows-recmutex.h"
+# include "windows-once.h"
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+/* We can use CRITICAL_SECTION directly, rather than the native Windows Event,
+   Mutex, Semaphore types, because
+     - we need only to synchronize inside a single process (address space),
+       not inter-process locking,
+     - we don't need to support trylock operations.  (TryEnterCriticalSection
+       does not work on Windows 95/98/ME.  Packages that need trylock usually
+       define their own mutex type.)  */
+
+/* There is no way to statically initialize a CRITICAL_SECTION.  It needs
+   to be done lazily, once only.  For this we need spinlocks.  */
+
+/* -------------------------- gl_lock_t datatype -------------------------- */
+
+typedef glwthread_mutex_t gl_lock_t;
+# define gl_lock_define(STORAGECLASS, NAME) \
+    STORAGECLASS gl_lock_t NAME;
+# define gl_lock_define_initialized(STORAGECLASS, NAME) \
+    STORAGECLASS gl_lock_t NAME = gl_lock_initializer;
+# define gl_lock_initializer \
+    GLWTHREAD_MUTEX_INIT
+# define glthread_lock_init(LOCK) \
+    (glwthread_mutex_init (LOCK), 0)
+# define glthread_lock_lock(LOCK) \
+    glwthread_mutex_lock (LOCK)
+# define glthread_lock_unlock(LOCK) \
+    glwthread_mutex_unlock (LOCK)
+# define glthread_lock_destroy(LOCK) \
+    glwthread_mutex_destroy (LOCK)
+
+/* ------------------------- gl_rwlock_t datatype ------------------------- */
+
+typedef glwthread_rwlock_t gl_rwlock_t;
+# define gl_rwlock_define(STORAGECLASS, NAME) \
+    STORAGECLASS gl_rwlock_t NAME;
+# define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
+    STORAGECLASS gl_rwlock_t NAME = gl_rwlock_initializer;
+# define gl_rwlock_initializer \
+    GLWTHREAD_RWLOCK_INIT
+# define glthread_rwlock_init(LOCK) \
+    (glwthread_rwlock_init (LOCK), 0)
+# define glthread_rwlock_rdlock(LOCK) \
+    glwthread_rwlock_rdlock (LOCK)
+# define glthread_rwlock_wrlock(LOCK) \
+    glwthread_rwlock_wrlock (LOCK)
+# define glthread_rwlock_unlock(LOCK) \
+    glwthread_rwlock_unlock (LOCK)
+# define glthread_rwlock_destroy(LOCK) \
+    glwthread_rwlock_destroy (LOCK)
+
+/* --------------------- gl_recursive_lock_t datatype --------------------- */
+
+typedef glwthread_recmutex_t gl_recursive_lock_t;
+# define gl_recursive_lock_define(STORAGECLASS, NAME) \
+    STORAGECLASS gl_recursive_lock_t NAME;
+# define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
+    STORAGECLASS gl_recursive_lock_t NAME = gl_recursive_lock_initializer;
+# define gl_recursive_lock_initializer \
+    GLWTHREAD_RECMUTEX_INIT
+# define glthread_recursive_lock_init(LOCK) \
+    (glwthread_recmutex_init (LOCK), 0)
+# define glthread_recursive_lock_lock(LOCK) \
+    glwthread_recmutex_lock (LOCK)
+# define glthread_recursive_lock_unlock(LOCK) \
+    glwthread_recmutex_unlock (LOCK)
+# define glthread_recursive_lock_destroy(LOCK) \
+    glwthread_recmutex_destroy (LOCK)
+
+/* -------------------------- gl_once_t datatype -------------------------- */
+
+typedef glwthread_once_t gl_once_t;
+# define gl_once_define(STORAGECLASS, NAME) \
+    STORAGECLASS gl_once_t NAME = GLWTHREAD_ONCE_INIT;
+# define glthread_once(ONCE_CONTROL, INITFUNCTION) \
+    (glwthread_once (ONCE_CONTROL, INITFUNCTION), 0)
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if !(USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS)
+
+/* Provide dummy implementation if threads are not supported.  */
+
+/* -------------------------- gl_lock_t datatype -------------------------- */
+
+typedef int gl_lock_t;
+# define gl_lock_define(STORAGECLASS, NAME)
+# define gl_lock_define_initialized(STORAGECLASS, NAME)
+# define glthread_lock_init(NAME) 0
+# define glthread_lock_lock(NAME) 0
+# define glthread_lock_unlock(NAME) 0
+# define glthread_lock_destroy(NAME) 0
+
+/* ------------------------- gl_rwlock_t datatype ------------------------- */
+
+typedef int gl_rwlock_t;
+# define gl_rwlock_define(STORAGECLASS, NAME)
+# define gl_rwlock_define_initialized(STORAGECLASS, NAME)
+# define glthread_rwlock_init(NAME) 0
+# define glthread_rwlock_rdlock(NAME) 0
+# define glthread_rwlock_wrlock(NAME) 0
+# define glthread_rwlock_unlock(NAME) 0
+# define glthread_rwlock_destroy(NAME) 0
+
+/* --------------------- gl_recursive_lock_t datatype --------------------- */
+
+typedef int gl_recursive_lock_t;
+# define gl_recursive_lock_define(STORAGECLASS, NAME)
+# define gl_recursive_lock_define_initialized(STORAGECLASS, NAME)
+# define glthread_recursive_lock_init(NAME) 0
+# define glthread_recursive_lock_lock(NAME) 0
+# define glthread_recursive_lock_unlock(NAME) 0
+# define glthread_recursive_lock_destroy(NAME) 0
+
+/* -------------------------- gl_once_t datatype -------------------------- */
+
+typedef int gl_once_t;
+# define gl_once_define(STORAGECLASS, NAME) \
+    STORAGECLASS gl_once_t NAME = 0;
+# define glthread_once(ONCE_CONTROL, INITFUNCTION) \
+    (*(ONCE_CONTROL) == 0 ? (*(ONCE_CONTROL) = ~ 0, INITFUNCTION (), 0) : 0)
+
+#endif
+
+/* ========================================================================= */
+
+/* Macros with built-in error handling.  */
+
+/* -------------------------- gl_lock_t datatype -------------------------- */
+
+#define gl_lock_init(NAME) \
+   do                                  \
+     {                                 \
+       if (glthread_lock_init (&NAME)) \
+         abort ();                     \
+     }                                 \
+   while (0)
+#define gl_lock_lock(NAME) \
+   do                                  \
+     {                                 \
+       if (glthread_lock_lock (&NAME)) \
+         abort ();                     \
+     }                                 \
+   while (0)
+#define gl_lock_unlock(NAME) \
+   do                                    \
+     {                                   \
+       if (glthread_lock_unlock (&NAME)) \
+         abort ();                       \
+     }                                   \
+   while (0)
+#define gl_lock_destroy(NAME) \
+   do                                     \
+     {                                    \
+       if (glthread_lock_destroy (&NAME)) \
+         abort ();                        \
+     }                                    \
+   while (0)
+
+/* ------------------------- gl_rwlock_t datatype ------------------------- */
+
+#define gl_rwlock_init(NAME) \
+   do                                    \
+     {                                   \
+       if (glthread_rwlock_init (&NAME)) \
+         abort ();                       \
+     }                                   \
+   while (0)
+#define gl_rwlock_rdlock(NAME) \
+   do                                      \
+     {                                     \
+       if (glthread_rwlock_rdlock (&NAME)) \
+         abort ();                         \
+     }                                     \
+   while (0)
+#define gl_rwlock_wrlock(NAME) \
+   do                                      \
+     {                                     \
+       if (glthread_rwlock_wrlock (&NAME)) \
+         abort ();                         \
+     }                                     \
+   while (0)
+#define gl_rwlock_unlock(NAME) \
+   do                                      \
+     {                                     \
+       if (glthread_rwlock_unlock (&NAME)) \
+         abort ();                         \
+     }                                     \
+   while (0)
+#define gl_rwlock_destroy(NAME) \
+   do                                       \
+     {                                      \
+       if (glthread_rwlock_destroy (&NAME)) \
+         abort ();                          \
+     }                                      \
+   while (0)
+
+/* --------------------- gl_recursive_lock_t datatype --------------------- */
+
+#define gl_recursive_lock_init(NAME) \
+   do                                            \
+     {                                           \
+       if (glthread_recursive_lock_init (&NAME)) \
+         abort ();                               \
+     }                                           \
+   while (0)
+#define gl_recursive_lock_lock(NAME) \
+   do                                            \
+     {                                           \
+       if (glthread_recursive_lock_lock (&NAME)) \
+         abort ();                               \
+     }                                           \
+   while (0)
+#define gl_recursive_lock_unlock(NAME) \
+   do                                              \
+     {                                             \
+       if (glthread_recursive_lock_unlock (&NAME)) \
+         abort ();                                 \
+     }                                             \
+   while (0)
+#define gl_recursive_lock_destroy(NAME) \
+   do                                               \
+     {                                              \
+       if (glthread_recursive_lock_destroy (&NAME)) \
+         abort ();                                  \
+     }                                              \
+   while (0)
+
+/* -------------------------- gl_once_t datatype -------------------------- */
+
+#define gl_once(NAME, INITFUNCTION) \
+   do                                           \
+     {                                          \
+       if (glthread_once (&NAME, INITFUNCTION)) \
+         abort ();                              \
+     }                                          \
+   while (0)
+
+/* ========================================================================= */
+
+#endif /* _LOCK_H */
diff --git a/src/grep/lib/glthread/threadlib.c b/src/grep/lib/glthread/threadlib.c
new file mode 100644
index 0000000..793bc69
--- /dev/null
+++ b/src/grep/lib/glthread/threadlib.c
@@ -0,0 +1,108 @@
+/* Multithreading primitives.
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.  */
+
+#include <config.h>
+
+/* ========================================================================= */
+
+#if USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS
+
+/* Use the POSIX threads library.  */
+
+# include <errno.h>
+# include <pthread.h>
+# include <stdlib.h>
+
+# if PTHREAD_IN_USE_DETECTION_HARD
+
+#  if defined __FreeBSD__ || defined __DragonFly__                 /* FreeBSD */
+
+/* Test using pthread_key_create.  */
+
+int
+glthread_in_use (void)
+{
+  static int tested;
+  static int result; /* 1: linked with -lpthread, 0: only with libc */
+
+  if (!tested)
+    {
+      pthread_key_t key;
+      int err = pthread_key_create (&key, NULL);
+
+      if (err == ENOSYS)
+        result = 0;
+      else
+        {
+          result = 1;
+          if (err == 0)
+            pthread_key_delete (key);
+        }
+      tested = 1;
+    }
+  return result;
+}
+
+#  else                                                     /* Solaris, HP-UX */
+
+/* Test using pthread_create.  */
+
+/* The function to be executed by a dummy thread.  */
+static void *
+dummy_thread_func (void *arg)
+{
+  return arg;
+}
+
+int
+glthread_in_use (void)
+{
+  static int tested;
+  static int result; /* 1: linked with -lpthread, 0: only with libc */
+
+  if (!tested)
+    {
+      pthread_t thread;
+
+      if (pthread_create (&thread, NULL, dummy_thread_func, NULL) != 0)
+        /* Thread creation failed.  */
+        result = 0;
+      else
+        {
+          /* Thread creation works.  */
+          void *retval;
+          if (pthread_join (thread, &retval) != 0)
+            abort ();
+          result = 1;
+        }
+      tested = 1;
+    }
+  return result;
+}
+
+#  endif
+
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+/* This declaration is solely to ensure that after preprocessing
+   this file is never empty.  */
+typedef int dummy;
diff --git a/src/grep/lib/gnulib.mk b/src/grep/lib/gnulib.mk
new file mode 100644
index 0000000..ae08701
--- /dev/null
+++ b/src/grep/lib/gnulib.mk
@@ -0,0 +1,3358 @@
+## DO NOT EDIT! GENERATED AUTOMATICALLY!
+## Process this file with automake to produce Makefile.in.
+# Copyright (C) 2002-2021 Free Software Foundation, Inc.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This file is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this file.  If not, see <https://www.gnu.org/licenses/>.
+#
+# As a special exception to the GNU General Public License,
+# this file may be distributed as part of a program that
+# contains a configuration script generated by Autoconf, under
+# the same distribution terms as the rest of that program.
+#
+# Generated by gnulib-tool.
+# Reproduce by:
+# gnulib-tool --import --local-dir=gl \
+#  --lib=libgreputils \
+#  --source-base=lib \
+#  --m4-base=m4 \
+#  --doc-base=doc \
+#  --tests-base=gnulib-tests \
+#  --aux-dir=build-aux \
+#  --with-tests \
+#  --makefile-name=gnulib.mk \
+#  --no-conditional-dependencies \
+#  --no-libtool \
+#  --macro-prefix=gl \
+#  --avoid=lock-tests \
+#  --avoid=mbrtowc-tests \
+#  --avoid=update-copyright-tests \
+#  alloca \
+#  announce-gen \
+#  argmatch \
+#  c-ctype \
+#  c-stack \
+#  c-strcase \
+#  closeout \
+#  configmake \
+#  dfa \
+#  dirname-lgpl \
+#  do-release-commit-and-tag \
+#  error \
+#  exclude \
+#  fcntl-h \
+#  fdl \
+#  fnmatch \
+#  fstatat \
+#  fts \
+#  getopt-gnu \
+#  getpagesize \
+#  getprogname \
+#  gettext-h \
+#  git-version-gen \
+#  gitlog-to-changelog \
+#  gnu-web-doc-update \
+#  gnupload \
+#  hash \
+#  ignore-value \
+#  intprops \
+#  inttypes \
+#  isatty \
+#  isblank \
+#  iswctype \
+#  largefile \
+#  locale \
+#  lseek \
+#  maintainer-makefile \
+#  malloc-gnu \
+#  manywarnings \
+#  mbrlen \
+#  mbrtowc \
+#  memchr \
+#  memchr2 \
+#  mempcpy \
+#  minmax \
+#  obstack \
+#  openat-safer \
+#  perl \
+#  propername \
+#  rawmemchr \
+#  readme-release \
+#  realloc-gnu \
+#  regex \
+#  safe-read \
+#  same-inode \
+#  ssize_t \
+#  stddef \
+#  stdlib \
+#  stpcpy \
+#  strerror \
+#  string \
+#  strstr \
+#  strtoull \
+#  strtoumax \
+#  sys_stat \
+#  unistd \
+#  unlocked-io \
+#  update-copyright \
+#  useless-if-before-free \
+#  verify \
+#  version-etc-fsf \
+#  wchar \
+#  wcrtomb \
+#  wctob \
+#  wctype-h \
+#  windows-stat-inodes \
+#  xalloc \
+#  xbinary-io \
+#  xstrtoimax
+
+
+MOSTLYCLEANFILES += core *.stackdump
+# No GNU Make output.
+
+noinst_LIBRARIES += libgreputils.a
+
+libgreputils_a_SOURCES =
+libgreputils_a_LIBADD = $(gl_LIBOBJS)
+libgreputils_a_DEPENDENCIES = $(gl_LIBOBJS)
+EXTRA_libgreputils_a_SOURCES =
+
+## begin gnulib module absolute-header
+
+# Use this preprocessor expression to decide whether #include_next works.
+# Do not rely on a 'configure'-time test for this, since the expression
+# might appear in an installed header, which is used by some other compiler.
+HAVE_INCLUDE_NEXT = (__GNUC__ || __clang__ || 60000000 <= __DECC_VER)
+
+## end   gnulib module absolute-header
+
+## begin gnulib module alignof
+
+
+EXTRA_DIST += alignof.h
+
+## end   gnulib module alignof
+
+## begin gnulib module alloca
+
+
+libgreputils_a_LIBADD += @ALLOCA@
+libgreputils_a_DEPENDENCIES += @ALLOCA@
+EXTRA_DIST += alloca.c
+
+EXTRA_libgreputils_a_SOURCES += alloca.c
+
+## end   gnulib module alloca
+
+## begin gnulib module alloca-opt
+
+BUILT_SOURCES += $(ALLOCA_H)
+
+# We need the following in order to create <alloca.h> when the system
+# doesn't have one that works with the given compiler.
+if GL_GENERATE_ALLOCA_H
+alloca.h: alloca.in.h $(top_builddir)/config.status
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''HAVE_ALLOCA_H''@|$(HAVE_ALLOCA_H)|g' < $(srcdir)/alloca.in.h; \
+	} > $@-t && \
+	mv -f $@-t $@
+else
+alloca.h: $(top_builddir)/config.status
+	rm -f $@
+endif
+MOSTLYCLEANFILES += alloca.h alloca.h-t
+
+EXTRA_DIST += alloca.in.h
+
+## end   gnulib module alloca-opt
+
+## begin gnulib module announce-gen
+
+
+EXTRA_DIST += $(top_srcdir)/build-aux/announce-gen
+
+## end   gnulib module announce-gen
+
+## begin gnulib module argmatch
+
+libgreputils_a_SOURCES += argmatch.c
+
+EXTRA_DIST += argmatch.h
+
+## end   gnulib module argmatch
+
+## begin gnulib module assure
+
+
+EXTRA_DIST += assure.h
+
+## end   gnulib module assure
+
+## begin gnulib module at-internal
+
+libgreputils_a_SOURCES += openat-priv.h openat-proc.c
+
+## end   gnulib module at-internal
+
+## begin gnulib module attribute
+
+
+EXTRA_DIST += attribute.h
+
+## end   gnulib module attribute
+
+## begin gnulib module basename-lgpl
+
+libgreputils_a_SOURCES += basename-lgpl.c
+
+EXTRA_DIST += basename-lgpl.h
+
+## end   gnulib module basename-lgpl
+
+## begin gnulib module binary-io
+
+libgreputils_a_SOURCES += binary-io.h binary-io.c
+
+## end   gnulib module binary-io
+
+## begin gnulib module bitrotate
+
+libgreputils_a_SOURCES += bitrotate.h bitrotate.c
+
+## end   gnulib module bitrotate
+
+## begin gnulib module btowc
+
+
+EXTRA_DIST += btowc.c
+
+EXTRA_libgreputils_a_SOURCES += btowc.c
+
+## end   gnulib module btowc
+
+## begin gnulib module c-ctype
+
+libgreputils_a_SOURCES += c-ctype.h c-ctype.c
+
+## end   gnulib module c-ctype
+
+## begin gnulib module c-stack
+
+libgreputils_a_SOURCES += c-stack.h c-stack.c
+
+## end   gnulib module c-stack
+
+## begin gnulib module c-strcase
+
+libgreputils_a_SOURCES += c-strcase.h c-strcasecmp.c c-strncasecmp.c
+
+## end   gnulib module c-strcase
+
+## begin gnulib module c-strcaseeq
+
+
+EXTRA_DIST += c-strcaseeq.h
+
+## end   gnulib module c-strcaseeq
+
+## begin gnulib module calloc-gnu
+
+
+EXTRA_DIST += calloc.c
+
+EXTRA_libgreputils_a_SOURCES += calloc.c
+
+## end   gnulib module calloc-gnu
+
+## begin gnulib module calloc-posix
+
+
+EXTRA_DIST += calloc.c
+
+EXTRA_libgreputils_a_SOURCES += calloc.c
+
+## end   gnulib module calloc-posix
+
+## begin gnulib module chdir-long
+
+
+EXTRA_DIST += chdir-long.c chdir-long.h
+
+EXTRA_libgreputils_a_SOURCES += chdir-long.c
+
+## end   gnulib module chdir-long
+
+## begin gnulib module cloexec
+
+libgreputils_a_SOURCES += cloexec.c
+
+EXTRA_DIST += cloexec.h
+
+## end   gnulib module cloexec
+
+## begin gnulib module close
+
+
+EXTRA_DIST += close.c
+
+EXTRA_libgreputils_a_SOURCES += close.c
+
+## end   gnulib module close
+
+## begin gnulib module close-stream
+
+libgreputils_a_SOURCES += close-stream.c
+
+EXTRA_DIST += close-stream.h
+
+## end   gnulib module close-stream
+
+## begin gnulib module closedir
+
+
+EXTRA_DIST += closedir.c dirent-private.h
+
+EXTRA_libgreputils_a_SOURCES += closedir.c
+
+## end   gnulib module closedir
+
+## begin gnulib module closeout
+
+libgreputils_a_SOURCES += closeout.c
+
+EXTRA_DIST += closeout.h
+
+## end   gnulib module closeout
+
+## begin gnulib module configmake
+
+# Listed in the same order as the GNU makefile conventions, and
+# provided by autoconf 2.59c+ or 2.70.
+# The Automake-defined pkg* macros are appended, in the order
+# listed in the Automake 1.10a+ documentation.
+configmake.h: Makefile
+	$(AM_V_GEN)rm -f $@-t && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  echo '#if HAVE_WINSOCK2_H'; \
+	  echo '# include <winsock2.h> /* avoid mingw pollution on DATADIR */'; \
+	  echo '#endif'; \
+	  echo '#define PREFIX "$(prefix)"'; \
+	  echo '#define EXEC_PREFIX "$(exec_prefix)"'; \
+	  echo '#define BINDIR "$(bindir)"'; \
+	  echo '#define SBINDIR "$(sbindir)"'; \
+	  echo '#define LIBEXECDIR "$(libexecdir)"'; \
+	  echo '#define DATAROOTDIR "$(datarootdir)"'; \
+	  echo '#define DATADIR "$(datadir)"'; \
+	  echo '#define SYSCONFDIR "$(sysconfdir)"'; \
+	  echo '#define SHAREDSTATEDIR "$(sharedstatedir)"'; \
+	  echo '#define LOCALSTATEDIR "$(localstatedir)"'; \
+	  echo '#define RUNSTATEDIR "$(runstatedir)"'; \
+	  echo '#define INCLUDEDIR "$(includedir)"'; \
+	  echo '#define OLDINCLUDEDIR "$(oldincludedir)"'; \
+	  echo '#define DOCDIR "$(docdir)"'; \
+	  echo '#define INFODIR "$(infodir)"'; \
+	  echo '#define HTMLDIR "$(htmldir)"'; \
+	  echo '#define DVIDIR "$(dvidir)"'; \
+	  echo '#define PDFDIR "$(pdfdir)"'; \
+	  echo '#define PSDIR "$(psdir)"'; \
+	  echo '#define LIBDIR "$(libdir)"'; \
+	  echo '#define LISPDIR "$(lispdir)"'; \
+	  echo '#define LOCALEDIR "$(localedir)"'; \
+	  echo '#define MANDIR "$(mandir)"'; \
+	  echo '#define MANEXT "$(manext)"'; \
+	  echo '#define PKGDATADIR "$(pkgdatadir)"'; \
+	  echo '#define PKGINCLUDEDIR "$(pkgincludedir)"'; \
+	  echo '#define PKGLIBDIR "$(pkglibdir)"'; \
+	  echo '#define PKGLIBEXECDIR "$(pkglibexecdir)"'; \
+	} | sed '/""/d' > $@-t && \
+	mv -f $@-t $@
+
+BUILT_SOURCES += configmake.h
+CLEANFILES += configmake.h configmake.h-t
+
+## end   gnulib module configmake
+
+## begin gnulib module ctype
+
+BUILT_SOURCES += ctype.h
+
+# We need the following in order to create <ctype.h> when the system
+# doesn't have one that works with the given compiler.
+ctype.h: ctype.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_CTYPE_H''@|$(NEXT_CTYPE_H)|g' \
+	      -e 's/@''GNULIB_ISBLANK''@/$(GL_GNULIB_ISBLANK)/g' \
+	      -e 's/@''HAVE_ISBLANK''@/$(HAVE_ISBLANK)/g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/ctype.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += ctype.h ctype.h-t
+
+EXTRA_DIST += ctype.in.h
+
+## end   gnulib module ctype
+
+## begin gnulib module cycle-check
+
+libgreputils_a_SOURCES += cycle-check.c
+
+EXTRA_DIST += cycle-check.h
+
+## end   gnulib module cycle-check
+
+## begin gnulib module dev-ino
+
+
+EXTRA_DIST += dev-ino.h
+
+## end   gnulib module dev-ino
+
+## begin gnulib module dfa
+
+libgreputils_a_SOURCES += dfa.c localeinfo.c
+
+EXTRA_DIST += dfa.h localeinfo.h
+
+## end   gnulib module dfa
+
+## begin gnulib module dirent
+
+BUILT_SOURCES += dirent.h
+
+# We need the following in order to create <dirent.h> when the system
+# doesn't have one that works with the given compiler.
+dirent.h: dirent.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''HAVE_DIRENT_H''@|$(HAVE_DIRENT_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_DIRENT_H''@|$(NEXT_DIRENT_H)|g' \
+	      -e 's/@''GNULIB_OPENDIR''@/$(GL_GNULIB_OPENDIR)/g' \
+	      -e 's/@''GNULIB_READDIR''@/$(GL_GNULIB_READDIR)/g' \
+	      -e 's/@''GNULIB_REWINDDIR''@/$(GL_GNULIB_REWINDDIR)/g' \
+	      -e 's/@''GNULIB_CLOSEDIR''@/$(GL_GNULIB_CLOSEDIR)/g' \
+	      -e 's/@''GNULIB_DIRFD''@/$(GL_GNULIB_DIRFD)/g' \
+	      -e 's/@''GNULIB_FDOPENDIR''@/$(GL_GNULIB_FDOPENDIR)/g' \
+	      -e 's/@''GNULIB_SCANDIR''@/$(GL_GNULIB_SCANDIR)/g' \
+	      -e 's/@''GNULIB_ALPHASORT''@/$(GL_GNULIB_ALPHASORT)/g' \
+	      -e 's/@''HAVE_OPENDIR''@/$(HAVE_OPENDIR)/g' \
+	      -e 's/@''HAVE_READDIR''@/$(HAVE_READDIR)/g' \
+	      -e 's/@''HAVE_REWINDDIR''@/$(HAVE_REWINDDIR)/g' \
+	      -e 's/@''HAVE_CLOSEDIR''@/$(HAVE_CLOSEDIR)/g' \
+	      -e 's|@''HAVE_DECL_DIRFD''@|$(HAVE_DECL_DIRFD)|g' \
+	      -e 's|@''HAVE_DECL_FDOPENDIR''@|$(HAVE_DECL_FDOPENDIR)|g' \
+	      -e 's|@''HAVE_FDOPENDIR''@|$(HAVE_FDOPENDIR)|g' \
+	      -e 's|@''HAVE_SCANDIR''@|$(HAVE_SCANDIR)|g' \
+	      -e 's|@''HAVE_ALPHASORT''@|$(HAVE_ALPHASORT)|g' \
+	      -e 's|@''REPLACE_OPENDIR''@|$(REPLACE_OPENDIR)|g' \
+	      -e 's|@''REPLACE_CLOSEDIR''@|$(REPLACE_CLOSEDIR)|g' \
+	      -e 's|@''REPLACE_DIRFD''@|$(REPLACE_DIRFD)|g' \
+	      -e 's|@''REPLACE_FDOPENDIR''@|$(REPLACE_FDOPENDIR)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/dirent.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += dirent.h dirent.h-t
+
+EXTRA_DIST += dirent.in.h
+
+## end   gnulib module dirent
+
+## begin gnulib module dirfd
+
+
+EXTRA_DIST += dirfd.c
+
+EXTRA_libgreputils_a_SOURCES += dirfd.c
+
+## end   gnulib module dirfd
+
+## begin gnulib module dirname-lgpl
+
+libgreputils_a_SOURCES += dirname-lgpl.c stripslash.c
+
+EXTRA_DIST += dirname.h
+
+## end   gnulib module dirname-lgpl
+
+## begin gnulib module do-release-commit-and-tag
+
+
+EXTRA_DIST += $(top_srcdir)/build-aux/do-release-commit-and-tag
+
+## end   gnulib module do-release-commit-and-tag
+
+## begin gnulib module dup
+
+
+EXTRA_DIST += dup.c
+
+EXTRA_libgreputils_a_SOURCES += dup.c
+
+## end   gnulib module dup
+
+## begin gnulib module dup2
+
+
+EXTRA_DIST += dup2.c
+
+EXTRA_libgreputils_a_SOURCES += dup2.c
+
+## end   gnulib module dup2
+
+## begin gnulib module dynarray
+
+BUILT_SOURCES += malloc/dynarray.gl.h malloc/dynarray-skeleton.gl.h
+
+malloc/dynarray.gl.h: malloc/dynarray.h
+	$(AM_V_at)$(MKDIR_P) malloc
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e '/libc_hidden_proto/d' < $(srcdir)/malloc/dynarray.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += malloc/dynarray.gl.h malloc/dynarray.gl.h-t
+
+malloc/dynarray-skeleton.gl.h: malloc/dynarray-skeleton.c
+	$(AM_V_at)$(MKDIR_P) malloc
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|<malloc/dynarray\.h>|<malloc/dynarray.gl.h>|g' \
+	      -e 's|__attribute_maybe_unused__|_GL_ATTRIBUTE_MAYBE_UNUSED|g' \
+	      -e 's|__attribute_nonnull__|_GL_ATTRIBUTE_NONNULL|g' \
+	      -e 's|__attribute_warn_unused_result__|_GL_ATTRIBUTE_NODISCARD|g' \
+	      -e 's|__glibc_likely|_GL_LIKELY|g' \
+	      -e 's|__glibc_unlikely|_GL_UNLIKELY|g' \
+	      < $(srcdir)/malloc/dynarray-skeleton.c; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += malloc/dynarray-skeleton.gl.h malloc/dynarray-skeleton.gl.h-t
+
+libgreputils_a_SOURCES += malloc/dynarray_at_failure.c                 malloc/dynarray_emplace_enlarge.c                 malloc/dynarray_finalize.c                 malloc/dynarray_resize.c                 malloc/dynarray_resize_clear.c
+
+EXTRA_DIST += dynarray.h malloc/dynarray-skeleton.c malloc/dynarray.h
+
+EXTRA_libgreputils_a_SOURCES += malloc/dynarray-skeleton.c
+
+## end   gnulib module dynarray
+
+## begin gnulib module errno
+
+BUILT_SOURCES += $(ERRNO_H)
+
+# We need the following in order to create <errno.h> when the system
+# doesn't have one that is POSIX compliant.
+if GL_GENERATE_ERRNO_H
+errno.h: errno.in.h $(top_builddir)/config.status
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_ERRNO_H''@|$(NEXT_ERRNO_H)|g' \
+	      -e 's|@''EMULTIHOP_HIDDEN''@|$(EMULTIHOP_HIDDEN)|g' \
+	      -e 's|@''EMULTIHOP_VALUE''@|$(EMULTIHOP_VALUE)|g' \
+	      -e 's|@''ENOLINK_HIDDEN''@|$(ENOLINK_HIDDEN)|g' \
+	      -e 's|@''ENOLINK_VALUE''@|$(ENOLINK_VALUE)|g' \
+	      -e 's|@''EOVERFLOW_HIDDEN''@|$(EOVERFLOW_HIDDEN)|g' \
+	      -e 's|@''EOVERFLOW_VALUE''@|$(EOVERFLOW_VALUE)|g' \
+	      < $(srcdir)/errno.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+else
+errno.h: $(top_builddir)/config.status
+	rm -f $@
+endif
+MOSTLYCLEANFILES += errno.h errno.h-t
+
+EXTRA_DIST += errno.in.h
+
+## end   gnulib module errno
+
+## begin gnulib module error
+
+
+EXTRA_DIST += error.c error.h
+
+EXTRA_libgreputils_a_SOURCES += error.c
+
+## end   gnulib module error
+
+## begin gnulib module exclude
+
+libgreputils_a_SOURCES += exclude.c
+
+EXTRA_DIST += exclude.h
+
+## end   gnulib module exclude
+
+## begin gnulib module exitfail
+
+libgreputils_a_SOURCES += exitfail.c
+
+EXTRA_DIST += exitfail.h
+
+## end   gnulib module exitfail
+
+## begin gnulib module fchdir
+
+
+EXTRA_DIST += fchdir.c
+
+EXTRA_libgreputils_a_SOURCES += fchdir.c
+
+## end   gnulib module fchdir
+
+## begin gnulib module fcntl
+
+
+EXTRA_DIST += fcntl.c
+
+EXTRA_libgreputils_a_SOURCES += fcntl.c
+
+## end   gnulib module fcntl
+
+## begin gnulib module fcntl-h
+
+BUILT_SOURCES += fcntl.h
+
+# We need the following in order to create <fcntl.h> when the system
+# doesn't have one that works with the given compiler.
+fcntl.h: fcntl.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_FCNTL_H''@|$(NEXT_FCNTL_H)|g' \
+	      -e 's/@''GNULIB_CREAT''@/$(GL_GNULIB_CREAT)/g' \
+	      -e 's/@''GNULIB_FCNTL''@/$(GL_GNULIB_FCNTL)/g' \
+	      -e 's/@''GNULIB_NONBLOCKING''@/$(GL_GNULIB_NONBLOCKING)/g' \
+	      -e 's/@''GNULIB_OPEN''@/$(GL_GNULIB_OPEN)/g' \
+	      -e 's/@''GNULIB_OPENAT''@/$(GL_GNULIB_OPENAT)/g' \
+	      -e 's/@''GNULIB_MDA_CREAT''@/$(GL_GNULIB_MDA_CREAT)/g' \
+	      -e 's/@''GNULIB_MDA_OPEN''@/$(GL_GNULIB_MDA_OPEN)/g' \
+	      -e 's|@''HAVE_FCNTL''@|$(HAVE_FCNTL)|g' \
+	      -e 's|@''HAVE_OPENAT''@|$(HAVE_OPENAT)|g' \
+	      -e 's|@''REPLACE_CREAT''@|$(REPLACE_CREAT)|g' \
+	      -e 's|@''REPLACE_FCNTL''@|$(REPLACE_FCNTL)|g' \
+	      -e 's|@''REPLACE_OPEN''@|$(REPLACE_OPEN)|g' \
+	      -e 's|@''REPLACE_OPENAT''@|$(REPLACE_OPENAT)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/fcntl.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += fcntl.h fcntl.h-t
+
+EXTRA_DIST += fcntl.in.h
+
+## end   gnulib module fcntl-h
+
+## begin gnulib module fcntl-safer
+
+libgreputils_a_SOURCES += creat-safer.c open-safer.c
+
+EXTRA_DIST += fcntl--.h fcntl-safer.h
+
+## end   gnulib module fcntl-safer
+
+## begin gnulib module fd-hook
+
+libgreputils_a_SOURCES += fd-hook.c
+
+EXTRA_DIST += fd-hook.h
+
+## end   gnulib module fd-hook
+
+## begin gnulib module fd-safer-flag
+
+libgreputils_a_SOURCES += fd-safer-flag.c dup-safer-flag.c
+
+## end   gnulib module fd-safer-flag
+
+## begin gnulib module fdopendir
+
+
+EXTRA_DIST += fdopendir.c
+
+EXTRA_libgreputils_a_SOURCES += fdopendir.c
+
+## end   gnulib module fdopendir
+
+## begin gnulib module filename
+
+
+EXTRA_DIST += filename.h
+
+## end   gnulib module filename
+
+## begin gnulib module filenamecat-lgpl
+
+libgreputils_a_SOURCES += filenamecat-lgpl.c
+
+EXTRA_DIST += filenamecat.h
+
+## end   gnulib module filenamecat-lgpl
+
+## begin gnulib module flexmember
+
+
+EXTRA_DIST += flexmember.h
+
+## end   gnulib module flexmember
+
+## begin gnulib module fnmatch
+
+
+EXTRA_DIST += fnmatch.c fnmatch_loop.c
+
+EXTRA_libgreputils_a_SOURCES += fnmatch.c fnmatch_loop.c
+
+## end   gnulib module fnmatch
+
+## begin gnulib module fnmatch-h
+
+BUILT_SOURCES += $(FNMATCH_H)
+
+# We need the following in order to create <fnmatch.h>.
+if GL_GENERATE_FNMATCH_H
+fnmatch.h: fnmatch.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''HAVE_FNMATCH_H''@|$(HAVE_FNMATCH_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_FNMATCH_H''@|$(NEXT_FNMATCH_H)|g' \
+	      -e 's/@''GNULIB_FNMATCH''@/$(GL_GNULIB_FNMATCH)/g' \
+	      -e 's|@''HAVE_FNMATCH''@|$(HAVE_FNMATCH)|g' \
+	      -e 's|@''REPLACE_FNMATCH''@|$(REPLACE_FNMATCH)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/fnmatch.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+else
+fnmatch.h: $(top_builddir)/config.status
+	rm -f $@
+endif
+MOSTLYCLEANFILES += fnmatch.h fnmatch.h-t
+
+EXTRA_DIST += fnmatch.in.h
+
+## end   gnulib module fnmatch-h
+
+## begin gnulib module fopen
+
+
+EXTRA_DIST += fopen.c
+
+EXTRA_libgreputils_a_SOURCES += fopen.c
+
+## end   gnulib module fopen
+
+## begin gnulib module fopen-gnu
+
+
+EXTRA_DIST += fopen.c
+
+EXTRA_libgreputils_a_SOURCES += fopen.c
+
+## end   gnulib module fopen-gnu
+
+## begin gnulib module fpending
+
+
+EXTRA_DIST += fpending.c fpending.h stdio-impl.h
+
+EXTRA_libgreputils_a_SOURCES += fpending.c
+
+## end   gnulib module fpending
+
+## begin gnulib module free-posix
+
+
+EXTRA_DIST += free.c
+
+EXTRA_libgreputils_a_SOURCES += free.c
+
+## end   gnulib module free-posix
+
+## begin gnulib module fstat
+
+
+EXTRA_DIST += fstat.c stat-w32.c stat-w32.h
+
+EXTRA_libgreputils_a_SOURCES += fstat.c stat-w32.c
+
+## end   gnulib module fstat
+
+## begin gnulib module fstatat
+
+
+EXTRA_DIST += at-func.c fstatat.c
+
+EXTRA_libgreputils_a_SOURCES += at-func.c fstatat.c
+
+## end   gnulib module fstatat
+
+## begin gnulib module fts
+
+
+EXTRA_DIST += fts-cycle.c fts.c fts_.h
+
+EXTRA_libgreputils_a_SOURCES += fts-cycle.c fts.c
+
+## end   gnulib module fts
+
+## begin gnulib module gendocs
+
+
+EXTRA_DIST += $(top_srcdir)/build-aux/gendocs.sh
+
+## end   gnulib module gendocs
+
+## begin gnulib module getcwd-lgpl
+
+
+EXTRA_DIST += getcwd-lgpl.c
+
+EXTRA_libgreputils_a_SOURCES += getcwd-lgpl.c
+
+## end   gnulib module getcwd-lgpl
+
+## begin gnulib module getdtablesize
+
+
+EXTRA_DIST += getdtablesize.c
+
+EXTRA_libgreputils_a_SOURCES += getdtablesize.c
+
+## end   gnulib module getdtablesize
+
+## begin gnulib module getopt-posix
+
+BUILT_SOURCES += $(GETOPT_H) $(GETOPT_CDEFS_H)
+
+# We need the following in order to create <getopt.h> when the system
+# doesn't have one that works with the given compiler.
+getopt.h: getopt.in.h $(top_builddir)/config.status $(ARG_NONNULL_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''HAVE_GETOPT_H''@|$(HAVE_GETOPT_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_GETOPT_H''@|$(NEXT_GETOPT_H)|g' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      < $(srcdir)/getopt.in.h; \
+	} > $@-t && \
+	mv -f $@-t $@
+
+getopt-cdefs.h: getopt-cdefs.in.h $(top_builddir)/config.status
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+          sed -e 's|@''HAVE_SYS_CDEFS_H''@|$(HAVE_SYS_CDEFS_H)|g' \
+	      < $(srcdir)/getopt-cdefs.in.h; \
+	} > $@-t && \
+	mv -f $@-t $@
+
+MOSTLYCLEANFILES += getopt.h getopt.h-t getopt-cdefs.h getopt-cdefs.h-t
+
+EXTRA_DIST += getopt-cdefs.in.h getopt-core.h getopt-ext.h getopt-pfx-core.h getopt-pfx-ext.h getopt.c getopt.in.h getopt1.c getopt_int.h
+
+EXTRA_libgreputils_a_SOURCES += getopt.c getopt1.c
+
+## end   gnulib module getopt-posix
+
+## begin gnulib module getpagesize
+
+
+EXTRA_DIST += getpagesize.c
+
+EXTRA_libgreputils_a_SOURCES += getpagesize.c
+
+## end   gnulib module getpagesize
+
+## begin gnulib module getprogname
+
+libgreputils_a_SOURCES += getprogname.h getprogname.c
+
+## end   gnulib module getprogname
+
+## begin gnulib module gettext-h
+
+libgreputils_a_SOURCES += gettext.h
+
+## end   gnulib module gettext-h
+
+## begin gnulib module git-version-gen
+
+
+EXTRA_DIST += $(top_srcdir)/build-aux/git-version-gen
+
+## end   gnulib module git-version-gen
+
+## begin gnulib module gitlog-to-changelog
+
+
+EXTRA_DIST += $(top_srcdir)/build-aux/gitlog-to-changelog
+
+## end   gnulib module gitlog-to-changelog
+
+## begin gnulib module gnu-web-doc-update
+
+
+EXTRA_DIST += $(top_srcdir)/build-aux/gnu-web-doc-update
+
+## end   gnulib module gnu-web-doc-update
+
+## begin gnulib module gnumakefile
+
+EXTRA_DIST += $(top_srcdir)/GNUmakefile
+distclean-local: clean-GNUmakefile
+clean-GNUmakefile:
+	test '$(srcdir)' = . || rm -f $(top_builddir)/GNUmakefile
+
+## end   gnulib module gnumakefile
+
+## begin gnulib module gnupload
+
+
+EXTRA_DIST += $(top_srcdir)/build-aux/gnupload
+
+## end   gnulib module gnupload
+
+## begin gnulib module gperf
+
+GPERF = gperf
+V_GPERF = $(V_GPERF_@AM_V@)
+V_GPERF_ = $(V_GPERF_@AM_DEFAULT_V@)
+V_GPERF_0 = @echo "  GPERF   " $@;
+
+## end   gnulib module gperf
+
+## begin gnulib module hard-locale
+
+libgreputils_a_SOURCES += hard-locale.c
+
+EXTRA_DIST += hard-locale.h
+
+## end   gnulib module hard-locale
+
+## begin gnulib module hash
+
+libgreputils_a_SOURCES += hash.c
+
+EXTRA_DIST += hash.h
+
+## end   gnulib module hash
+
+## begin gnulib module havelib
+
+
+EXTRA_DIST += $(top_srcdir)/build-aux/config.rpath
+
+## end   gnulib module havelib
+
+## begin gnulib module i-ring
+
+libgreputils_a_SOURCES += i-ring.c
+
+EXTRA_DIST += i-ring.h
+
+## end   gnulib module i-ring
+
+## begin gnulib module ialloc
+
+libgreputils_a_SOURCES += ialloc.c
+
+EXTRA_DIST += ialloc.h
+
+## end   gnulib module ialloc
+
+## begin gnulib module iconv-h
+
+BUILT_SOURCES += $(ICONV_H)
+
+# We need the following in order to create <iconv.h> when the system
+# doesn't have one that works with the given compiler.
+if GL_GENERATE_ICONV_H
+iconv.h: iconv.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_ICONV_H''@|$(NEXT_ICONV_H)|g' \
+	      -e 's/@''GNULIB_ICONV''@/$(GL_GNULIB_ICONV)/g' \
+	      -e 's|@''ICONV_CONST''@|$(ICONV_CONST)|g' \
+	      -e 's|@''REPLACE_ICONV''@|$(REPLACE_ICONV)|g' \
+	      -e 's|@''REPLACE_ICONV_OPEN''@|$(REPLACE_ICONV_OPEN)|g' \
+	      -e 's|@''REPLACE_ICONV_UTF''@|$(REPLACE_ICONV_UTF)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/iconv.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+else
+iconv.h: $(top_builddir)/config.status
+	rm -f $@
+endif
+MOSTLYCLEANFILES += iconv.h iconv.h-t
+
+EXTRA_DIST += iconv.in.h
+
+## end   gnulib module iconv-h
+
+## begin gnulib module iconv_open
+
+$(srcdir)/iconv_open-aix.h: $(srcdir)/iconv_open-aix.gperf
+	$(V_GPERF)$(GPERF) -m 10 $(srcdir)/iconv_open-aix.gperf > $(srcdir)/iconv_open-aix.h-t && \
+	mv $(srcdir)/iconv_open-aix.h-t $(srcdir)/iconv_open-aix.h
+$(srcdir)/iconv_open-hpux.h: $(srcdir)/iconv_open-hpux.gperf
+	$(V_GPERF)$(GPERF) -m 10 $(srcdir)/iconv_open-hpux.gperf > $(srcdir)/iconv_open-hpux.h-t && \
+	mv $(srcdir)/iconv_open-hpux.h-t $(srcdir)/iconv_open-hpux.h
+$(srcdir)/iconv_open-irix.h: $(srcdir)/iconv_open-irix.gperf
+	$(V_GPERF)$(GPERF) -m 10 $(srcdir)/iconv_open-irix.gperf > $(srcdir)/iconv_open-irix.h-t && \
+	mv $(srcdir)/iconv_open-irix.h-t $(srcdir)/iconv_open-irix.h
+$(srcdir)/iconv_open-osf.h: $(srcdir)/iconv_open-osf.gperf
+	$(V_GPERF)$(GPERF) -m 10 $(srcdir)/iconv_open-osf.gperf > $(srcdir)/iconv_open-osf.h-t && \
+	mv $(srcdir)/iconv_open-osf.h-t $(srcdir)/iconv_open-osf.h
+$(srcdir)/iconv_open-solaris.h: $(srcdir)/iconv_open-solaris.gperf
+	$(V_GPERF)$(GPERF) -m 10 $(srcdir)/iconv_open-solaris.gperf > $(srcdir)/iconv_open-solaris.h-t && \
+	mv $(srcdir)/iconv_open-solaris.h-t $(srcdir)/iconv_open-solaris.h
+$(srcdir)/iconv_open-zos.h: $(srcdir)/iconv_open-zos.gperf
+	$(V_GPERF)$(GPERF) -m 10 $(srcdir)/iconv_open-zos.gperf > $(srcdir)/iconv_open-zos.h-t && \
+	mv $(srcdir)/iconv_open-zos.h-t $(srcdir)/iconv_open-zos.h
+BUILT_SOURCES        += iconv_open-aix.h iconv_open-hpux.h iconv_open-irix.h iconv_open-osf.h iconv_open-solaris.h iconv_open-zos.h
+MOSTLYCLEANFILES     += iconv_open-aix.h-t iconv_open-hpux.h-t iconv_open-irix.h-t iconv_open-osf.h-t iconv_open-solaris.h-t iconv_open-zos.h-t
+MAINTAINERCLEANFILES += iconv_open-aix.h iconv_open-hpux.h iconv_open-irix.h iconv_open-osf.h iconv_open-solaris.h iconv_open-zos.h
+EXTRA_DIST           += iconv_open-aix.h iconv_open-hpux.h iconv_open-irix.h iconv_open-osf.h iconv_open-solaris.h iconv_open-zos.h
+
+EXTRA_DIST += iconv.c iconv_close.c iconv_open-aix.gperf iconv_open-hpux.gperf iconv_open-irix.gperf iconv_open-osf.gperf iconv_open-solaris.gperf iconv_open-zos.gperf iconv_open.c
+
+EXTRA_libgreputils_a_SOURCES += iconv.c iconv_close.c iconv_open.c
+
+## end   gnulib module iconv_open
+
+## begin gnulib module idx
+
+libgreputils_a_SOURCES += idx.h
+
+## end   gnulib module idx
+
+## begin gnulib module ignore-value
+
+
+EXTRA_DIST += ignore-value.h
+
+## end   gnulib module ignore-value
+
+## begin gnulib module intprops
+
+
+EXTRA_DIST += intprops.h
+
+## end   gnulib module intprops
+
+## begin gnulib module inttypes-incomplete
+
+BUILT_SOURCES += inttypes.h
+
+# We need the following in order to create <inttypes.h> when the system
+# doesn't have one that works with the given compiler.
+inttypes.h: inttypes.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H) $(ARG_NONNULL_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's/@''HAVE_INTTYPES_H''@/$(HAVE_INTTYPES_H)/g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_INTTYPES_H''@|$(NEXT_INTTYPES_H)|g' \
+	      -e 's/@''APPLE_UNIVERSAL_BUILD''@/$(APPLE_UNIVERSAL_BUILD)/g' \
+	      -e 's/@''PRIPTR_PREFIX''@/$(PRIPTR_PREFIX)/g' \
+	      -e 's/@''GNULIB_IMAXABS''@/$(GL_GNULIB_IMAXABS)/g' \
+	      -e 's/@''GNULIB_IMAXDIV''@/$(GL_GNULIB_IMAXDIV)/g' \
+	      -e 's/@''GNULIB_STRTOIMAX''@/$(GL_GNULIB_STRTOIMAX)/g' \
+	      -e 's/@''GNULIB_STRTOUMAX''@/$(GL_GNULIB_STRTOUMAX)/g' \
+	      -e 's/@''HAVE_DECL_IMAXABS''@/$(HAVE_DECL_IMAXABS)/g' \
+	      -e 's/@''HAVE_DECL_IMAXDIV''@/$(HAVE_DECL_IMAXDIV)/g' \
+	      -e 's/@''HAVE_DECL_STRTOIMAX''@/$(HAVE_DECL_STRTOIMAX)/g' \
+	      -e 's/@''HAVE_DECL_STRTOUMAX''@/$(HAVE_DECL_STRTOUMAX)/g' \
+	      -e 's/@''HAVE_IMAXDIV_T''@/$(HAVE_IMAXDIV_T)/g' \
+	      -e 's/@''REPLACE_STRTOIMAX''@/$(REPLACE_STRTOIMAX)/g' \
+	      -e 's/@''REPLACE_STRTOUMAX''@/$(REPLACE_STRTOUMAX)/g' \
+	      -e 's/@''INT32_MAX_LT_INTMAX_MAX''@/$(INT32_MAX_LT_INTMAX_MAX)/g' \
+	      -e 's/@''INT64_MAX_EQ_LONG_MAX''@/$(INT64_MAX_EQ_LONG_MAX)/g' \
+	      -e 's/@''UINT32_MAX_LT_UINTMAX_MAX''@/$(UINT32_MAX_LT_UINTMAX_MAX)/g' \
+	      -e 's/@''UINT64_MAX_EQ_ULONG_MAX''@/$(UINT64_MAX_EQ_ULONG_MAX)/g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/inttypes.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += inttypes.h inttypes.h-t
+
+EXTRA_DIST += inttypes.in.h
+
+## end   gnulib module inttypes-incomplete
+
+## begin gnulib module isatty
+
+
+EXTRA_DIST += isatty.c
+
+EXTRA_libgreputils_a_SOURCES += isatty.c
+
+## end   gnulib module isatty
+
+## begin gnulib module isblank
+
+
+EXTRA_DIST += isblank.c
+
+EXTRA_libgreputils_a_SOURCES += isblank.c
+
+## end   gnulib module isblank
+
+## begin gnulib module iswblank
+
+
+EXTRA_DIST += iswblank.c
+
+EXTRA_libgreputils_a_SOURCES += iswblank.c
+
+## end   gnulib module iswblank
+
+## begin gnulib module iswctype
+
+
+EXTRA_DIST += iswctype-impl.h iswctype.c
+
+EXTRA_libgreputils_a_SOURCES += iswctype.c
+
+## end   gnulib module iswctype
+
+## begin gnulib module iswdigit
+
+
+EXTRA_DIST += iswdigit.c
+
+EXTRA_libgreputils_a_SOURCES += iswdigit.c
+
+## end   gnulib module iswdigit
+
+## begin gnulib module iswxdigit
+
+
+EXTRA_DIST += iswxdigit.c
+
+EXTRA_libgreputils_a_SOURCES += iswxdigit.c
+
+## end   gnulib module iswxdigit
+
+## begin gnulib module langinfo
+
+BUILT_SOURCES += langinfo.h
+
+# We need the following in order to create an empty placeholder for
+# <langinfo.h> when the system doesn't have one.
+langinfo.h: langinfo.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''HAVE_LANGINFO_H''@|$(HAVE_LANGINFO_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_LANGINFO_H''@|$(NEXT_LANGINFO_H)|g' \
+	      -e 's/@''GNULIB_NL_LANGINFO''@/$(GL_GNULIB_NL_LANGINFO)/g' \
+	      -e 's|@''HAVE_LANGINFO_CODESET''@|$(HAVE_LANGINFO_CODESET)|g' \
+	      -e 's|@''HAVE_LANGINFO_T_FMT_AMPM''@|$(HAVE_LANGINFO_T_FMT_AMPM)|g' \
+	      -e 's|@''HAVE_LANGINFO_ALTMON''@|$(HAVE_LANGINFO_ALTMON)|g' \
+	      -e 's|@''HAVE_LANGINFO_ERA''@|$(HAVE_LANGINFO_ERA)|g' \
+	      -e 's|@''HAVE_LANGINFO_YESEXPR''@|$(HAVE_LANGINFO_YESEXPR)|g' \
+	      -e 's|@''HAVE_NL_LANGINFO''@|$(HAVE_NL_LANGINFO)|g' \
+	      -e 's|@''REPLACE_NL_LANGINFO''@|$(REPLACE_NL_LANGINFO)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/langinfo.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += langinfo.h langinfo.h-t
+
+EXTRA_DIST += langinfo.in.h
+
+## end   gnulib module langinfo
+
+## begin gnulib module libc-config
+
+
+EXTRA_DIST += cdefs.h libc-config.h
+
+## end   gnulib module libc-config
+
+## begin gnulib module limits-h
+
+BUILT_SOURCES += $(LIMITS_H)
+
+# We need the following in order to create <limits.h> when the system
+# doesn't have one that is compatible with GNU.
+if GL_GENERATE_LIMITS_H
+limits.h: limits.in.h $(top_builddir)/config.status
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_LIMITS_H''@|$(NEXT_LIMITS_H)|g' \
+	      < $(srcdir)/limits.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+else
+limits.h: $(top_builddir)/config.status
+	rm -f $@
+endif
+MOSTLYCLEANFILES += limits.h limits.h-t
+
+EXTRA_DIST += limits.in.h
+
+## end   gnulib module limits-h
+
+## begin gnulib module localcharset
+
+libgreputils_a_SOURCES += localcharset.c
+
+EXTRA_DIST += localcharset.h
+
+## end   gnulib module localcharset
+
+## begin gnulib module locale
+
+BUILT_SOURCES += locale.h
+
+# We need the following in order to create <locale.h> when the system
+# doesn't have one that provides all definitions.
+locale.h: locale.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_LOCALE_H''@|$(NEXT_LOCALE_H)|g' \
+	      -e 's/@''GNULIB_LOCALECONV''@/$(GL_GNULIB_LOCALECONV)/g' \
+	      -e 's/@''GNULIB_SETLOCALE''@/$(GL_GNULIB_SETLOCALE)/g' \
+	      -e 's/@''GNULIB_SETLOCALE_NULL''@/$(GL_GNULIB_SETLOCALE_NULL)/g' \
+	      -e 's/@''GNULIB_DUPLOCALE''@/$(GL_GNULIB_DUPLOCALE)/g' \
+	      -e 's/@''GNULIB_LOCALENAME''@/$(GL_GNULIB_LOCALENAME)/g' \
+	      -e 's|@''HAVE_NEWLOCALE''@|$(HAVE_NEWLOCALE)|g' \
+	      -e 's|@''HAVE_DUPLOCALE''@|$(HAVE_DUPLOCALE)|g' \
+	      -e 's|@''HAVE_FREELOCALE''@|$(HAVE_FREELOCALE)|g' \
+	      -e 's|@''HAVE_XLOCALE_H''@|$(HAVE_XLOCALE_H)|g' \
+	      -e 's|@''REPLACE_LOCALECONV''@|$(REPLACE_LOCALECONV)|g' \
+	      -e 's|@''REPLACE_SETLOCALE''@|$(REPLACE_SETLOCALE)|g' \
+	      -e 's|@''REPLACE_NEWLOCALE''@|$(REPLACE_NEWLOCALE)|g' \
+	      -e 's|@''REPLACE_DUPLOCALE''@|$(REPLACE_DUPLOCALE)|g' \
+	      -e 's|@''REPLACE_FREELOCALE''@|$(REPLACE_FREELOCALE)|g' \
+	      -e 's|@''REPLACE_STRUCT_LCONV''@|$(REPLACE_STRUCT_LCONV)|g' \
+	      -e 's|@''LOCALENAME_ENHANCE_LOCALE_FUNCS''@|$(LOCALENAME_ENHANCE_LOCALE_FUNCS)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/locale.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += locale.h locale.h-t
+
+EXTRA_DIST += locale.in.h
+
+## end   gnulib module locale
+
+## begin gnulib module localeconv
+
+
+EXTRA_DIST += localeconv.c
+
+EXTRA_libgreputils_a_SOURCES += localeconv.c
+
+## end   gnulib module localeconv
+
+## begin gnulib module lock
+
+libgreputils_a_SOURCES += glthread/lock.h glthread/lock.c
+
+## end   gnulib module lock
+
+## begin gnulib module lseek
+
+
+EXTRA_DIST += lseek.c
+
+EXTRA_libgreputils_a_SOURCES += lseek.c
+
+## end   gnulib module lseek
+
+## begin gnulib module lstat
+
+
+EXTRA_DIST += lstat.c
+
+EXTRA_libgreputils_a_SOURCES += lstat.c
+
+## end   gnulib module lstat
+
+## begin gnulib module maintainer-makefile
+
+EXTRA_DIST += $(top_srcdir)/maint.mk
+
+## end   gnulib module maintainer-makefile
+
+## begin gnulib module malloc-gnu
+
+
+EXTRA_DIST += malloc.c
+
+EXTRA_libgreputils_a_SOURCES += malloc.c
+
+## end   gnulib module malloc-gnu
+
+## begin gnulib module malloc-posix
+
+
+EXTRA_DIST += malloc.c
+
+EXTRA_libgreputils_a_SOURCES += malloc.c
+
+## end   gnulib module malloc-posix
+
+## begin gnulib module malloca
+
+libgreputils_a_SOURCES += malloca.c
+
+EXTRA_DIST += malloca.h
+
+## end   gnulib module malloca
+
+## begin gnulib module mbchar
+
+libgreputils_a_SOURCES += mbchar.c
+
+EXTRA_DIST += mbchar.h
+
+## end   gnulib module mbchar
+
+## begin gnulib module mbiter
+
+libgreputils_a_SOURCES += mbiter.h mbiter.c
+
+## end   gnulib module mbiter
+
+## begin gnulib module mbrlen
+
+
+EXTRA_DIST += mbrlen.c
+
+EXTRA_libgreputils_a_SOURCES += mbrlen.c
+
+## end   gnulib module mbrlen
+
+## begin gnulib module mbrtowc
+
+
+EXTRA_DIST += lc-charset-dispatch.c lc-charset-dispatch.h mbrtowc-impl-utf8.h mbrtowc-impl.h mbrtowc.c mbtowc-lock.c mbtowc-lock.h windows-initguard.h
+
+EXTRA_libgreputils_a_SOURCES += lc-charset-dispatch.c mbrtowc.c mbtowc-lock.c
+
+## end   gnulib module mbrtowc
+
+## begin gnulib module mbscasecmp
+
+libgreputils_a_SOURCES += mbscasecmp.c
+
+## end   gnulib module mbscasecmp
+
+## begin gnulib module mbsinit
+
+
+EXTRA_DIST += mbsinit.c
+
+EXTRA_libgreputils_a_SOURCES += mbsinit.c
+
+## end   gnulib module mbsinit
+
+## begin gnulib module mbslen
+
+libgreputils_a_SOURCES += mbslen.c
+
+## end   gnulib module mbslen
+
+## begin gnulib module mbsrtowcs
+
+
+EXTRA_DIST += mbsrtowcs-impl.h mbsrtowcs-state.c mbsrtowcs.c
+
+EXTRA_libgreputils_a_SOURCES += mbsrtowcs-state.c mbsrtowcs.c
+
+## end   gnulib module mbsrtowcs
+
+## begin gnulib module mbsstr
+
+libgreputils_a_SOURCES += mbsstr.c
+
+EXTRA_DIST += str-kmp.h
+
+## end   gnulib module mbsstr
+
+## begin gnulib module mbtowc
+
+
+EXTRA_DIST += mbtowc-impl.h mbtowc.c
+
+EXTRA_libgreputils_a_SOURCES += mbtowc.c
+
+## end   gnulib module mbtowc
+
+## begin gnulib module mbuiter
+
+libgreputils_a_SOURCES += mbuiter.h mbuiter.c
+
+## end   gnulib module mbuiter
+
+## begin gnulib module memchr
+
+
+EXTRA_DIST += memchr.c memchr.valgrind
+
+EXTRA_libgreputils_a_SOURCES += memchr.c
+
+## end   gnulib module memchr
+
+## begin gnulib module memchr2
+
+libgreputils_a_SOURCES += memchr2.h memchr2.c
+
+EXTRA_DIST += memchr2.valgrind
+
+## end   gnulib module memchr2
+
+## begin gnulib module mempcpy
+
+
+EXTRA_DIST += mempcpy.c
+
+EXTRA_libgreputils_a_SOURCES += mempcpy.c
+
+## end   gnulib module mempcpy
+
+## begin gnulib module memrchr
+
+
+EXTRA_DIST += memrchr.c
+
+EXTRA_libgreputils_a_SOURCES += memrchr.c
+
+## end   gnulib module memrchr
+
+## begin gnulib module minmax
+
+libgreputils_a_SOURCES += minmax.h
+
+## end   gnulib module minmax
+
+## begin gnulib module msvc-inval
+
+
+EXTRA_DIST += msvc-inval.c msvc-inval.h
+
+EXTRA_libgreputils_a_SOURCES += msvc-inval.c
+
+## end   gnulib module msvc-inval
+
+## begin gnulib module msvc-nothrow
+
+
+EXTRA_DIST += msvc-nothrow.c msvc-nothrow.h
+
+EXTRA_libgreputils_a_SOURCES += msvc-nothrow.c
+
+## end   gnulib module msvc-nothrow
+
+## begin gnulib module nl_langinfo
+
+
+EXTRA_DIST += nl_langinfo-lock.c nl_langinfo.c windows-initguard.h
+
+EXTRA_libgreputils_a_SOURCES += nl_langinfo-lock.c nl_langinfo.c
+
+## end   gnulib module nl_langinfo
+
+## begin gnulib module obstack
+
+
+EXTRA_DIST += obstack.c obstack.h
+
+EXTRA_libgreputils_a_SOURCES += obstack.c
+
+## end   gnulib module obstack
+
+## begin gnulib module open
+
+
+EXTRA_DIST += open.c
+
+EXTRA_libgreputils_a_SOURCES += open.c
+
+## end   gnulib module open
+
+## begin gnulib module openat
+
+
+EXTRA_DIST += openat.c
+
+EXTRA_libgreputils_a_SOURCES += openat.c
+
+## end   gnulib module openat
+
+## begin gnulib module openat-die
+
+libgreputils_a_SOURCES += openat-die.c
+
+## end   gnulib module openat-die
+
+## begin gnulib module openat-h
+
+
+EXTRA_DIST += openat.h
+
+## end   gnulib module openat-h
+
+## begin gnulib module openat-safer
+
+libgreputils_a_SOURCES += openat-safer.c
+
+EXTRA_DIST += fcntl--.h fcntl-safer.h
+
+## end   gnulib module openat-safer
+
+## begin gnulib module opendir
+
+
+EXTRA_DIST += dirent-private.h opendir.c
+
+EXTRA_libgreputils_a_SOURCES += opendir.c
+
+## end   gnulib module opendir
+
+## begin gnulib module opendirat
+
+libgreputils_a_SOURCES += opendirat.c
+
+EXTRA_DIST += opendirat.h
+
+## end   gnulib module opendirat
+
+## begin gnulib module pathmax
+
+
+EXTRA_DIST += pathmax.h
+
+## end   gnulib module pathmax
+
+## begin gnulib module pipe-posix
+
+
+EXTRA_DIST += pipe.c
+
+EXTRA_libgreputils_a_SOURCES += pipe.c
+
+## end   gnulib module pipe-posix
+
+## begin gnulib module propername
+
+libgreputils_a_SOURCES += propername.h propername.c
+
+## end   gnulib module propername
+
+## begin gnulib module quote
+
+
+EXTRA_DIST += quote.h
+
+## end   gnulib module quote
+
+## begin gnulib module quotearg
+
+libgreputils_a_SOURCES += quotearg.c
+
+EXTRA_DIST += quote.h quotearg.h
+
+## end   gnulib module quotearg
+
+## begin gnulib module raise
+
+
+EXTRA_DIST += raise.c
+
+EXTRA_libgreputils_a_SOURCES += raise.c
+
+## end   gnulib module raise
+
+## begin gnulib module rawmemchr
+
+
+EXTRA_DIST += rawmemchr.c rawmemchr.valgrind
+
+EXTRA_libgreputils_a_SOURCES += rawmemchr.c
+
+## end   gnulib module rawmemchr
+
+## begin gnulib module read
+
+
+EXTRA_DIST += read.c
+
+EXTRA_libgreputils_a_SOURCES += read.c
+
+## end   gnulib module read
+
+## begin gnulib module readdir
+
+
+EXTRA_DIST += dirent-private.h readdir.c
+
+EXTRA_libgreputils_a_SOURCES += readdir.c
+
+## end   gnulib module readdir
+
+## begin gnulib module realloc-gnu
+
+
+EXTRA_DIST += realloc.c
+
+EXTRA_libgreputils_a_SOURCES += realloc.c
+
+## end   gnulib module realloc-gnu
+
+## begin gnulib module realloc-posix
+
+
+EXTRA_DIST += realloc.c
+
+EXTRA_libgreputils_a_SOURCES += realloc.c
+
+## end   gnulib module realloc-posix
+
+## begin gnulib module reallocarray
+
+
+EXTRA_DIST += reallocarray.c
+
+EXTRA_libgreputils_a_SOURCES += reallocarray.c
+
+## end   gnulib module reallocarray
+
+## begin gnulib module regex
+
+
+EXTRA_DIST += regcomp.c regex.c regex.h regex_internal.c regex_internal.h regexec.c
+
+EXTRA_libgreputils_a_SOURCES += regcomp.c regex.c regex_internal.c regexec.c
+
+## end   gnulib module regex
+
+## begin gnulib module safe-read
+
+libgreputils_a_SOURCES += safe-read.c
+
+EXTRA_DIST += safe-read.h sys-limits.h
+
+## end   gnulib module safe-read
+
+## begin gnulib module same-inode
+
+
+EXTRA_DIST += same-inode.h
+
+## end   gnulib module same-inode
+
+## begin gnulib module save-cwd
+
+libgreputils_a_SOURCES += save-cwd.c
+
+EXTRA_DIST += save-cwd.h
+
+## end   gnulib module save-cwd
+
+## begin gnulib module setlocale-null
+
+libgreputils_a_SOURCES += setlocale_null.c
+
+EXTRA_DIST += setlocale-lock.c setlocale_null.h windows-initguard.h
+
+EXTRA_libgreputils_a_SOURCES += setlocale-lock.c
+
+## end   gnulib module setlocale-null
+
+## begin gnulib module signal-h
+
+BUILT_SOURCES += signal.h
+
+# We need the following in order to create <signal.h> when the system
+# doesn't have a complete one.
+signal.h: signal.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SIGNAL_H''@|$(NEXT_SIGNAL_H)|g' \
+	      -e 's/@''GNULIB_PTHREAD_SIGMASK''@/$(GL_GNULIB_PTHREAD_SIGMASK)/g' \
+	      -e 's/@''GNULIB_RAISE''@/$(GL_GNULIB_RAISE)/g' \
+	      -e 's/@''GNULIB_SIGNAL_H_SIGPIPE''@/$(GL_GNULIB_SIGNAL_H_SIGPIPE)/g' \
+	      -e 's/@''GNULIB_SIGPROCMASK''@/$(GL_GNULIB_SIGPROCMASK)/g' \
+	      -e 's/@''GNULIB_SIGACTION''@/$(GL_GNULIB_SIGACTION)/g' \
+	      -e 's|@''HAVE_POSIX_SIGNALBLOCKING''@|$(HAVE_POSIX_SIGNALBLOCKING)|g' \
+	      -e 's|@''HAVE_PTHREAD_SIGMASK''@|$(HAVE_PTHREAD_SIGMASK)|g' \
+	      -e 's|@''HAVE_RAISE''@|$(HAVE_RAISE)|g' \
+	      -e 's|@''HAVE_SIGSET_T''@|$(HAVE_SIGSET_T)|g' \
+	      -e 's|@''HAVE_SIGINFO_T''@|$(HAVE_SIGINFO_T)|g' \
+	      -e 's|@''HAVE_SIGACTION''@|$(HAVE_SIGACTION)|g' \
+	      -e 's|@''HAVE_STRUCT_SIGACTION_SA_SIGACTION''@|$(HAVE_STRUCT_SIGACTION_SA_SIGACTION)|g' \
+	      -e 's|@''HAVE_TYPE_VOLATILE_SIG_ATOMIC_T''@|$(HAVE_TYPE_VOLATILE_SIG_ATOMIC_T)|g' \
+	      -e 's|@''HAVE_SIGHANDLER_T''@|$(HAVE_SIGHANDLER_T)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SIGMASK''@|$(REPLACE_PTHREAD_SIGMASK)|g' \
+	      -e 's|@''REPLACE_RAISE''@|$(REPLACE_RAISE)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/signal.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += signal.h signal.h-t
+
+EXTRA_DIST += signal.in.h
+
+## end   gnulib module signal-h
+
+## begin gnulib module sigsegv
+
+BUILT_SOURCES += $(SIGSEGV_H)
+
+if GL_GENERATE_SIGSEGV_H
+sigsegv.h: sigsegv.in.h $(top_builddir)/config.status
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  cat $(srcdir)/sigsegv.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+else
+sigsegv.h: $(top_builddir)/config.status
+	rm -f $@
+endif
+MOSTLYCLEANFILES += sigsegv.h sigsegv.h-t
+
+if GL_GENERATE_SIGSEGV_H
+libgreputils_a_SOURCES += sigsegv.c stackvma.c
+endif
+
+EXTRA_DIST += sigsegv.in.h stackvma.h
+
+## end   gnulib module sigsegv
+
+## begin gnulib module snippet/_Noreturn
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+
+_NORETURN_H=$(srcdir)/_Noreturn.h
+
+EXTRA_DIST += _Noreturn.h
+
+## end   gnulib module snippet/_Noreturn
+
+## begin gnulib module snippet/arg-nonnull
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+
+ARG_NONNULL_H=$(srcdir)/arg-nonnull.h
+
+EXTRA_DIST += arg-nonnull.h
+
+## end   gnulib module snippet/arg-nonnull
+
+## begin gnulib module snippet/c++defs
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+
+CXXDEFS_H=$(srcdir)/c++defs.h
+
+EXTRA_DIST += c++defs.h
+
+## end   gnulib module snippet/c++defs
+
+## begin gnulib module snippet/warn-on-use
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+
+WARN_ON_USE_H=$(srcdir)/warn-on-use.h
+
+EXTRA_DIST += warn-on-use.h
+
+## end   gnulib module snippet/warn-on-use
+
+## begin gnulib module stat
+
+
+EXTRA_DIST += stat-w32.c stat-w32.h stat.c
+
+EXTRA_libgreputils_a_SOURCES += stat-w32.c stat.c
+
+## end   gnulib module stat
+
+## begin gnulib module stat-time
+
+libgreputils_a_SOURCES += stat-time.c
+
+EXTRA_DIST += stat-time.h
+
+## end   gnulib module stat-time
+
+## begin gnulib module stdalign
+
+BUILT_SOURCES += $(STDALIGN_H)
+
+# We need the following in order to create <stdalign.h> when the system
+# doesn't have one that works.
+if GL_GENERATE_STDALIGN_H
+stdalign.h: stdalign.in.h $(top_builddir)/config.status
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  cat $(srcdir)/stdalign.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+else
+stdalign.h: $(top_builddir)/config.status
+	rm -f $@
+endif
+MOSTLYCLEANFILES += stdalign.h stdalign.h-t
+
+EXTRA_DIST += stdalign.in.h
+
+## end   gnulib module stdalign
+
+## begin gnulib module stdarg
+
+BUILT_SOURCES += $(STDARG_H)
+
+# We need the following in order to create <stdarg.h> when the system
+# doesn't have one that works with the given compiler.
+if GL_GENERATE_STDARG_H
+stdarg.h: stdarg.in.h $(top_builddir)/config.status
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_STDARG_H''@|$(NEXT_STDARG_H)|g' \
+	      < $(srcdir)/stdarg.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+else
+stdarg.h: $(top_builddir)/config.status
+	rm -f $@
+endif
+MOSTLYCLEANFILES += stdarg.h stdarg.h-t
+
+EXTRA_DIST += stdarg.in.h
+
+## end   gnulib module stdarg
+
+## begin gnulib module stdbool
+
+BUILT_SOURCES += $(STDBOOL_H)
+
+# We need the following in order to create <stdbool.h> when the system
+# doesn't have one that works.
+if GL_GENERATE_STDBOOL_H
+stdbool.h: stdbool.in.h $(top_builddir)/config.status
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's/@''HAVE__BOOL''@/$(HAVE__BOOL)/g' < $(srcdir)/stdbool.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+else
+stdbool.h: $(top_builddir)/config.status
+	rm -f $@
+endif
+MOSTLYCLEANFILES += stdbool.h stdbool.h-t
+
+EXTRA_DIST += stdbool.in.h
+
+## end   gnulib module stdbool
+
+## begin gnulib module stddef
+
+BUILT_SOURCES += $(STDDEF_H)
+
+# We need the following in order to create <stddef.h> when the system
+# doesn't have one that works with the given compiler.
+if GL_GENERATE_STDDEF_H
+stddef.h: stddef.in.h $(top_builddir)/config.status
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_STDDEF_H''@|$(NEXT_STDDEF_H)|g' \
+	      -e 's|@''HAVE_MAX_ALIGN_T''@|$(HAVE_MAX_ALIGN_T)|g' \
+	      -e 's|@''HAVE_WCHAR_T''@|$(HAVE_WCHAR_T)|g' \
+	      -e 's|@''REPLACE_NULL''@|$(REPLACE_NULL)|g' \
+	      < $(srcdir)/stddef.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+else
+stddef.h: $(top_builddir)/config.status
+	rm -f $@
+endif
+MOSTLYCLEANFILES += stddef.h stddef.h-t
+
+EXTRA_DIST += stddef.in.h
+
+## end   gnulib module stddef
+
+## begin gnulib module stdint
+
+BUILT_SOURCES += $(STDINT_H)
+
+# We need the following in order to create <stdint.h> when the system
+# doesn't have one that works with the given compiler.
+if GL_GENERATE_STDINT_H
+stdint.h: stdint.in.h $(top_builddir)/config.status
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's/@''HAVE_STDINT_H''@/$(HAVE_STDINT_H)/g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_STDINT_H''@|$(NEXT_STDINT_H)|g' \
+	      -e 's/@''HAVE_C99_STDINT_H''@/$(HAVE_C99_STDINT_H)/g' \
+	      -e 's/@''HAVE_SYS_TYPES_H''@/$(HAVE_SYS_TYPES_H)/g' \
+	      -e 's/@''HAVE_INTTYPES_H''@/$(HAVE_INTTYPES_H)/g' \
+	      -e 's/@''HAVE_SYS_INTTYPES_H''@/$(HAVE_SYS_INTTYPES_H)/g' \
+	      -e 's/@''HAVE_SYS_BITYPES_H''@/$(HAVE_SYS_BITYPES_H)/g' \
+	      -e 's/@''HAVE_WCHAR_H''@/$(HAVE_WCHAR_H)/g' \
+	      -e 's/@''APPLE_UNIVERSAL_BUILD''@/$(APPLE_UNIVERSAL_BUILD)/g' \
+	      -e 's/@''BITSIZEOF_PTRDIFF_T''@/$(BITSIZEOF_PTRDIFF_T)/g' \
+	      -e 's/@''PTRDIFF_T_SUFFIX''@/$(PTRDIFF_T_SUFFIX)/g' \
+	      -e 's/@''BITSIZEOF_SIG_ATOMIC_T''@/$(BITSIZEOF_SIG_ATOMIC_T)/g' \
+	      -e 's/@''HAVE_SIGNED_SIG_ATOMIC_T''@/$(HAVE_SIGNED_SIG_ATOMIC_T)/g' \
+	      -e 's/@''SIG_ATOMIC_T_SUFFIX''@/$(SIG_ATOMIC_T_SUFFIX)/g' \
+	      -e 's/@''BITSIZEOF_SIZE_T''@/$(BITSIZEOF_SIZE_T)/g' \
+	      -e 's/@''SIZE_T_SUFFIX''@/$(SIZE_T_SUFFIX)/g' \
+	      -e 's/@''BITSIZEOF_WCHAR_T''@/$(BITSIZEOF_WCHAR_T)/g' \
+	      -e 's/@''HAVE_SIGNED_WCHAR_T''@/$(HAVE_SIGNED_WCHAR_T)/g' \
+	      -e 's/@''WCHAR_T_SUFFIX''@/$(WCHAR_T_SUFFIX)/g' \
+	      -e 's/@''BITSIZEOF_WINT_T''@/$(BITSIZEOF_WINT_T)/g' \
+	      -e 's/@''HAVE_SIGNED_WINT_T''@/$(HAVE_SIGNED_WINT_T)/g' \
+	      -e 's/@''WINT_T_SUFFIX''@/$(WINT_T_SUFFIX)/g' \
+	      -e 's/@''GNULIBHEADERS_OVERRIDE_WINT_T''@/$(GNULIBHEADERS_OVERRIDE_WINT_T)/g' \
+	      < $(srcdir)/stdint.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+else
+stdint.h: $(top_builddir)/config.status
+	rm -f $@
+endif
+MOSTLYCLEANFILES += stdint.h stdint.h-t
+
+EXTRA_DIST += stdint.in.h
+
+## end   gnulib module stdint
+
+## begin gnulib module stdio
+
+BUILT_SOURCES += stdio.h
+
+# We need the following in order to create <stdio.h> when the system
+# doesn't have one that works with the given compiler.
+stdio.h: stdio.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_STDIO_H''@|$(NEXT_STDIO_H)|g' \
+	      -e 's/@''GNULIB_DPRINTF''@/$(GL_GNULIB_DPRINTF)/g' \
+	      -e 's/@''GNULIB_FCLOSE''@/$(GL_GNULIB_FCLOSE)/g' \
+	      -e 's/@''GNULIB_FDOPEN''@/$(GL_GNULIB_FDOPEN)/g' \
+	      -e 's/@''GNULIB_FFLUSH''@/$(GL_GNULIB_FFLUSH)/g' \
+	      -e 's/@''GNULIB_FGETC''@/$(GL_GNULIB_FGETC)/g' \
+	      -e 's/@''GNULIB_FGETS''@/$(GL_GNULIB_FGETS)/g' \
+	      -e 's/@''GNULIB_FOPEN''@/$(GL_GNULIB_FOPEN)/g' \
+	      -e 's/@''GNULIB_FPRINTF''@/$(GL_GNULIB_FPRINTF)/g' \
+	      -e 's/@''GNULIB_FPRINTF_POSIX''@/$(GL_GNULIB_FPRINTF_POSIX)/g' \
+	      -e 's/@''GNULIB_FPURGE''@/$(GL_GNULIB_FPURGE)/g' \
+	      -e 's/@''GNULIB_FPUTC''@/$(GL_GNULIB_FPUTC)/g' \
+	      -e 's/@''GNULIB_FPUTS''@/$(GL_GNULIB_FPUTS)/g' \
+	      -e 's/@''GNULIB_FREAD''@/$(GL_GNULIB_FREAD)/g' \
+	      -e 's/@''GNULIB_FREOPEN''@/$(GL_GNULIB_FREOPEN)/g' \
+	      -e 's/@''GNULIB_FSCANF''@/$(GL_GNULIB_FSCANF)/g' \
+	      -e 's/@''GNULIB_FSEEK''@/$(GL_GNULIB_FSEEK)/g' \
+	      -e 's/@''GNULIB_FSEEKO''@/$(GL_GNULIB_FSEEKO)/g' \
+	      -e 's/@''GNULIB_FTELL''@/$(GL_GNULIB_FTELL)/g' \
+	      -e 's/@''GNULIB_FTELLO''@/$(GL_GNULIB_FTELLO)/g' \
+	      -e 's/@''GNULIB_FWRITE''@/$(GL_GNULIB_FWRITE)/g' \
+	      -e 's/@''GNULIB_GETC''@/$(GL_GNULIB_GETC)/g' \
+	      -e 's/@''GNULIB_GETCHAR''@/$(GL_GNULIB_GETCHAR)/g' \
+	      -e 's/@''GNULIB_GETDELIM''@/$(GL_GNULIB_GETDELIM)/g' \
+	      -e 's/@''GNULIB_GETLINE''@/$(GL_GNULIB_GETLINE)/g' \
+	      -e 's/@''GNULIB_OBSTACK_PRINTF''@/$(GL_GNULIB_OBSTACK_PRINTF)/g' \
+	      -e 's/@''GNULIB_OBSTACK_PRINTF_POSIX''@/$(GL_GNULIB_OBSTACK_PRINTF_POSIX)/g' \
+	      -e 's/@''GNULIB_PCLOSE''@/$(GL_GNULIB_PCLOSE)/g' \
+	      -e 's/@''GNULIB_PERROR''@/$(GL_GNULIB_PERROR)/g' \
+	      -e 's/@''GNULIB_POPEN''@/$(GL_GNULIB_POPEN)/g' \
+	      -e 's/@''GNULIB_PRINTF''@/$(GL_GNULIB_PRINTF)/g' \
+	      -e 's/@''GNULIB_PRINTF_POSIX''@/$(GL_GNULIB_PRINTF_POSIX)/g' \
+	      -e 's/@''GNULIB_PUTC''@/$(GL_GNULIB_PUTC)/g' \
+	      -e 's/@''GNULIB_PUTCHAR''@/$(GL_GNULIB_PUTCHAR)/g' \
+	      -e 's/@''GNULIB_PUTS''@/$(GL_GNULIB_PUTS)/g' \
+	      -e 's/@''GNULIB_REMOVE''@/$(GL_GNULIB_REMOVE)/g' \
+	      -e 's/@''GNULIB_RENAME''@/$(GL_GNULIB_RENAME)/g' \
+	      -e 's/@''GNULIB_RENAMEAT''@/$(GL_GNULIB_RENAMEAT)/g' \
+	      -e 's/@''GNULIB_SCANF''@/$(GL_GNULIB_SCANF)/g' \
+	      -e 's/@''GNULIB_SNPRINTF''@/$(GL_GNULIB_SNPRINTF)/g' \
+	      -e 's/@''GNULIB_SPRINTF_POSIX''@/$(GL_GNULIB_SPRINTF_POSIX)/g' \
+	      -e 's/@''GNULIB_STDIO_H_NONBLOCKING''@/$(GL_GNULIB_STDIO_H_NONBLOCKING)/g' \
+	      -e 's/@''GNULIB_STDIO_H_SIGPIPE''@/$(GL_GNULIB_STDIO_H_SIGPIPE)/g' \
+	      -e 's/@''GNULIB_TMPFILE''@/$(GL_GNULIB_TMPFILE)/g' \
+	      -e 's/@''GNULIB_VASPRINTF''@/$(GL_GNULIB_VASPRINTF)/g' \
+	      -e 's/@''GNULIB_VDPRINTF''@/$(GL_GNULIB_VDPRINTF)/g' \
+	      -e 's/@''GNULIB_VFPRINTF''@/$(GL_GNULIB_VFPRINTF)/g' \
+	      -e 's/@''GNULIB_VFPRINTF_POSIX''@/$(GL_GNULIB_VFPRINTF_POSIX)/g' \
+	      -e 's/@''GNULIB_VFSCANF''@/$(GL_GNULIB_VFSCANF)/g' \
+	      -e 's/@''GNULIB_VSCANF''@/$(GL_GNULIB_VSCANF)/g' \
+	      -e 's/@''GNULIB_VPRINTF''@/$(GL_GNULIB_VPRINTF)/g' \
+	      -e 's/@''GNULIB_VPRINTF_POSIX''@/$(GL_GNULIB_VPRINTF_POSIX)/g' \
+	      -e 's/@''GNULIB_VSNPRINTF''@/$(GL_GNULIB_VSNPRINTF)/g' \
+	      -e 's/@''GNULIB_VSPRINTF_POSIX''@/$(GL_GNULIB_VSPRINTF_POSIX)/g' \
+	      -e 's/@''GNULIB_MDA_FCLOSEALL''@/$(GL_GNULIB_MDA_FCLOSEALL)/g' \
+	      -e 's/@''GNULIB_MDA_FDOPEN''@/$(GL_GNULIB_MDA_FDOPEN)/g' \
+	      -e 's/@''GNULIB_MDA_FILENO''@/$(GL_GNULIB_MDA_FILENO)/g' \
+	      -e 's/@''GNULIB_MDA_GETW''@/$(GL_GNULIB_MDA_GETW)/g' \
+	      -e 's/@''GNULIB_MDA_PUTW''@/$(GL_GNULIB_MDA_PUTW)/g' \
+	      -e 's/@''GNULIB_MDA_TEMPNAM''@/$(GL_GNULIB_MDA_TEMPNAM)/g' \
+	      < $(srcdir)/stdio.in.h | \
+	  sed -e 's|@''HAVE_DECL_FCLOSEALL''@|$(HAVE_DECL_FCLOSEALL)|g' \
+	      -e 's|@''HAVE_DECL_FPURGE''@|$(HAVE_DECL_FPURGE)|g' \
+	      -e 's|@''HAVE_DECL_FSEEKO''@|$(HAVE_DECL_FSEEKO)|g' \
+	      -e 's|@''HAVE_DECL_FTELLO''@|$(HAVE_DECL_FTELLO)|g' \
+	      -e 's|@''HAVE_DECL_GETDELIM''@|$(HAVE_DECL_GETDELIM)|g' \
+	      -e 's|@''HAVE_DECL_GETLINE''@|$(HAVE_DECL_GETLINE)|g' \
+	      -e 's|@''HAVE_DECL_OBSTACK_PRINTF''@|$(HAVE_DECL_OBSTACK_PRINTF)|g' \
+	      -e 's|@''HAVE_DECL_SNPRINTF''@|$(HAVE_DECL_SNPRINTF)|g' \
+	      -e 's|@''HAVE_DECL_VSNPRINTF''@|$(HAVE_DECL_VSNPRINTF)|g' \
+	      -e 's|@''HAVE_DPRINTF''@|$(HAVE_DPRINTF)|g' \
+	      -e 's|@''HAVE_FSEEKO''@|$(HAVE_FSEEKO)|g' \
+	      -e 's|@''HAVE_FTELLO''@|$(HAVE_FTELLO)|g' \
+	      -e 's|@''HAVE_PCLOSE''@|$(HAVE_PCLOSE)|g' \
+	      -e 's|@''HAVE_POPEN''@|$(HAVE_POPEN)|g' \
+	      -e 's|@''HAVE_RENAMEAT''@|$(HAVE_RENAMEAT)|g' \
+	      -e 's|@''HAVE_VASPRINTF''@|$(HAVE_VASPRINTF)|g' \
+	      -e 's|@''HAVE_VDPRINTF''@|$(HAVE_VDPRINTF)|g' \
+	      -e 's|@''REPLACE_DPRINTF''@|$(REPLACE_DPRINTF)|g' \
+	      -e 's|@''REPLACE_FCLOSE''@|$(REPLACE_FCLOSE)|g' \
+	      -e 's|@''REPLACE_FDOPEN''@|$(REPLACE_FDOPEN)|g' \
+	      -e 's|@''REPLACE_FFLUSH''@|$(REPLACE_FFLUSH)|g' \
+	      -e 's|@''REPLACE_FOPEN''@|$(REPLACE_FOPEN)|g' \
+	      -e 's|@''REPLACE_FPRINTF''@|$(REPLACE_FPRINTF)|g' \
+	      -e 's|@''REPLACE_FPURGE''@|$(REPLACE_FPURGE)|g' \
+	      -e 's|@''REPLACE_FREOPEN''@|$(REPLACE_FREOPEN)|g' \
+	      -e 's|@''REPLACE_FSEEK''@|$(REPLACE_FSEEK)|g' \
+	      -e 's|@''REPLACE_FSEEKO''@|$(REPLACE_FSEEKO)|g' \
+	      -e 's|@''REPLACE_FTELL''@|$(REPLACE_FTELL)|g' \
+	      -e 's|@''REPLACE_FTELLO''@|$(REPLACE_FTELLO)|g' \
+	      -e 's|@''REPLACE_GETDELIM''@|$(REPLACE_GETDELIM)|g' \
+	      -e 's|@''REPLACE_GETLINE''@|$(REPLACE_GETLINE)|g' \
+	      -e 's|@''REPLACE_OBSTACK_PRINTF''@|$(REPLACE_OBSTACK_PRINTF)|g' \
+	      -e 's|@''REPLACE_PERROR''@|$(REPLACE_PERROR)|g' \
+	      -e 's|@''REPLACE_POPEN''@|$(REPLACE_POPEN)|g' \
+	      -e 's|@''REPLACE_PRINTF''@|$(REPLACE_PRINTF)|g' \
+	      -e 's|@''REPLACE_REMOVE''@|$(REPLACE_REMOVE)|g' \
+	      -e 's|@''REPLACE_RENAME''@|$(REPLACE_RENAME)|g' \
+	      -e 's|@''REPLACE_RENAMEAT''@|$(REPLACE_RENAMEAT)|g' \
+	      -e 's|@''REPLACE_SNPRINTF''@|$(REPLACE_SNPRINTF)|g' \
+	      -e 's|@''REPLACE_SPRINTF''@|$(REPLACE_SPRINTF)|g' \
+	      -e 's|@''REPLACE_STDIO_READ_FUNCS''@|$(REPLACE_STDIO_READ_FUNCS)|g' \
+	      -e 's|@''REPLACE_STDIO_WRITE_FUNCS''@|$(REPLACE_STDIO_WRITE_FUNCS)|g' \
+	      -e 's|@''REPLACE_TMPFILE''@|$(REPLACE_TMPFILE)|g' \
+	      -e 's|@''REPLACE_VASPRINTF''@|$(REPLACE_VASPRINTF)|g' \
+	      -e 's|@''REPLACE_VDPRINTF''@|$(REPLACE_VDPRINTF)|g' \
+	      -e 's|@''REPLACE_VFPRINTF''@|$(REPLACE_VFPRINTF)|g' \
+	      -e 's|@''REPLACE_VPRINTF''@|$(REPLACE_VPRINTF)|g' \
+	      -e 's|@''REPLACE_VSNPRINTF''@|$(REPLACE_VSNPRINTF)|g' \
+	      -e 's|@''REPLACE_VSPRINTF''@|$(REPLACE_VSPRINTF)|g' \
+	      -e 's|@''ASM_SYMBOL_PREFIX''@|$(ASM_SYMBOL_PREFIX)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)'; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += stdio.h stdio.h-t
+
+EXTRA_DIST += stdio.in.h
+
+## end   gnulib module stdio
+
+## begin gnulib module stdlib
+
+BUILT_SOURCES += stdlib.h
+
+# We need the following in order to create <stdlib.h> when the system
+# doesn't have one that works with the given compiler.
+stdlib.h: stdlib.in.h $(top_builddir)/config.status $(CXXDEFS_H) \
+  $(_NORETURN_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_STDLIB_H''@|$(NEXT_STDLIB_H)|g' \
+	      -e 's/@''GNULIB__EXIT''@/$(GL_GNULIB__EXIT)/g' \
+	      -e 's/@''GNULIB_ALIGNED_ALLOC''@/$(GL_GNULIB_ALIGNED_ALLOC)/g' \
+	      -e 's/@''GNULIB_ATOLL''@/$(GL_GNULIB_ATOLL)/g' \
+	      -e 's/@''GNULIB_CALLOC_POSIX''@/$(GL_GNULIB_CALLOC_POSIX)/g' \
+	      -e 's/@''GNULIB_CANONICALIZE_FILE_NAME''@/$(GL_GNULIB_CANONICALIZE_FILE_NAME)/g' \
+	      -e 's/@''GNULIB_FREE_POSIX''@/$(GL_GNULIB_FREE_POSIX)/g' \
+	      -e 's/@''GNULIB_GETLOADAVG''@/$(GL_GNULIB_GETLOADAVG)/g' \
+	      -e 's/@''GNULIB_GETSUBOPT''@/$(GL_GNULIB_GETSUBOPT)/g' \
+	      -e 's/@''GNULIB_GRANTPT''@/$(GL_GNULIB_GRANTPT)/g' \
+	      -e 's/@''GNULIB_MALLOC_POSIX''@/$(GL_GNULIB_MALLOC_POSIX)/g' \
+	      -e 's/@''GNULIB_MBTOWC''@/$(GL_GNULIB_MBTOWC)/g' \
+	      -e 's/@''GNULIB_MKDTEMP''@/$(GL_GNULIB_MKDTEMP)/g' \
+	      -e 's/@''GNULIB_MKOSTEMP''@/$(GL_GNULIB_MKOSTEMP)/g' \
+	      -e 's/@''GNULIB_MKOSTEMPS''@/$(GL_GNULIB_MKOSTEMPS)/g' \
+	      -e 's/@''GNULIB_MKSTEMP''@/$(GL_GNULIB_MKSTEMP)/g' \
+	      -e 's/@''GNULIB_MKSTEMPS''@/$(GL_GNULIB_MKSTEMPS)/g' \
+	      -e 's/@''GNULIB_POSIX_MEMALIGN''@/$(GL_GNULIB_POSIX_MEMALIGN)/g' \
+	      -e 's/@''GNULIB_POSIX_OPENPT''@/$(GL_GNULIB_POSIX_OPENPT)/g' \
+	      -e 's/@''GNULIB_PTSNAME''@/$(GL_GNULIB_PTSNAME)/g' \
+	      -e 's/@''GNULIB_PTSNAME_R''@/$(GL_GNULIB_PTSNAME_R)/g' \
+	      -e 's/@''GNULIB_PUTENV''@/$(GL_GNULIB_PUTENV)/g' \
+	      -e 's/@''GNULIB_QSORT_R''@/$(GL_GNULIB_QSORT_R)/g' \
+	      -e 's/@''GNULIB_RANDOM''@/$(GL_GNULIB_RANDOM)/g' \
+	      -e 's/@''GNULIB_RANDOM_R''@/$(GL_GNULIB_RANDOM_R)/g' \
+	      -e 's/@''GNULIB_REALLOC_POSIX''@/$(GL_GNULIB_REALLOC_POSIX)/g' \
+	      -e 's/@''GNULIB_REALLOCARRAY''@/$(GL_GNULIB_REALLOCARRAY)/g' \
+	      -e 's/@''GNULIB_REALPATH''@/$(GL_GNULIB_REALPATH)/g' \
+	      -e 's/@''GNULIB_RPMATCH''@/$(GL_GNULIB_RPMATCH)/g' \
+	      -e 's/@''GNULIB_SECURE_GETENV''@/$(GL_GNULIB_SECURE_GETENV)/g' \
+	      -e 's/@''GNULIB_SETENV''@/$(GL_GNULIB_SETENV)/g' \
+	      -e 's/@''GNULIB_STRTOD''@/$(GL_GNULIB_STRTOD)/g' \
+	      -e 's/@''GNULIB_STRTOL''@/$(GL_GNULIB_STRTOL)/g' \
+	      -e 's/@''GNULIB_STRTOLD''@/$(GL_GNULIB_STRTOLD)/g' \
+	      -e 's/@''GNULIB_STRTOLL''@/$(GL_GNULIB_STRTOLL)/g' \
+	      -e 's/@''GNULIB_STRTOUL''@/$(GL_GNULIB_STRTOUL)/g' \
+	      -e 's/@''GNULIB_STRTOULL''@/$(GL_GNULIB_STRTOULL)/g' \
+	      -e 's/@''GNULIB_SYSTEM_POSIX''@/$(GL_GNULIB_SYSTEM_POSIX)/g' \
+	      -e 's/@''GNULIB_UNLOCKPT''@/$(GL_GNULIB_UNLOCKPT)/g' \
+	      -e 's/@''GNULIB_UNSETENV''@/$(GL_GNULIB_UNSETENV)/g' \
+	      -e 's/@''GNULIB_WCTOMB''@/$(GL_GNULIB_WCTOMB)/g' \
+	      -e 's/@''GNULIB_MDA_ECVT''@/$(GL_GNULIB_MDA_ECVT)/g' \
+	      -e 's/@''GNULIB_MDA_FCVT''@/$(GL_GNULIB_MDA_FCVT)/g' \
+	      -e 's/@''GNULIB_MDA_GCVT''@/$(GL_GNULIB_MDA_GCVT)/g' \
+	      -e 's/@''GNULIB_MDA_MKTEMP''@/$(GL_GNULIB_MDA_MKTEMP)/g' \
+	      -e 's/@''GNULIB_MDA_PUTENV''@/$(GL_GNULIB_MDA_PUTENV)/g' \
+	      < $(srcdir)/stdlib.in.h | \
+	  sed -e 's|@''HAVE__EXIT''@|$(HAVE__EXIT)|g' \
+	      -e 's|@''HAVE_ALIGNED_ALLOC''@|$(HAVE_ALIGNED_ALLOC)|g' \
+	      -e 's|@''HAVE_ATOLL''@|$(HAVE_ATOLL)|g' \
+	      -e 's|@''HAVE_CANONICALIZE_FILE_NAME''@|$(HAVE_CANONICALIZE_FILE_NAME)|g' \
+	      -e 's|@''HAVE_DECL_ECVT''@|$(HAVE_DECL_ECVT)|g' \
+	      -e 's|@''HAVE_DECL_FCVT''@|$(HAVE_DECL_FCVT)|g' \
+	      -e 's|@''HAVE_DECL_GCVT''@|$(HAVE_DECL_GCVT)|g' \
+	      -e 's|@''HAVE_DECL_GETLOADAVG''@|$(HAVE_DECL_GETLOADAVG)|g' \
+	      -e 's|@''HAVE_GETSUBOPT''@|$(HAVE_GETSUBOPT)|g' \
+	      -e 's|@''HAVE_GRANTPT''@|$(HAVE_GRANTPT)|g' \
+	      -e 's|@''HAVE_INITSTATE''@|$(HAVE_INITSTATE)|g' \
+	      -e 's|@''HAVE_DECL_INITSTATE''@|$(HAVE_DECL_INITSTATE)|g' \
+	      -e 's|@''HAVE_MBTOWC''@|$(HAVE_MBTOWC)|g' \
+	      -e 's|@''HAVE_MKDTEMP''@|$(HAVE_MKDTEMP)|g' \
+	      -e 's|@''HAVE_MKOSTEMP''@|$(HAVE_MKOSTEMP)|g' \
+	      -e 's|@''HAVE_MKOSTEMPS''@|$(HAVE_MKOSTEMPS)|g' \
+	      -e 's|@''HAVE_MKSTEMP''@|$(HAVE_MKSTEMP)|g' \
+	      -e 's|@''HAVE_MKSTEMPS''@|$(HAVE_MKSTEMPS)|g' \
+	      -e 's|@''HAVE_POSIX_MEMALIGN''@|$(HAVE_POSIX_MEMALIGN)|g' \
+	      -e 's|@''HAVE_POSIX_OPENPT''@|$(HAVE_POSIX_OPENPT)|g' \
+	      -e 's|@''HAVE_PTSNAME''@|$(HAVE_PTSNAME)|g' \
+	      -e 's|@''HAVE_PTSNAME_R''@|$(HAVE_PTSNAME_R)|g' \
+	      -e 's|@''HAVE_QSORT_R''@|$(HAVE_QSORT_R)|g' \
+	      -e 's|@''HAVE_RANDOM''@|$(HAVE_RANDOM)|g' \
+	      -e 's|@''HAVE_RANDOM_H''@|$(HAVE_RANDOM_H)|g' \
+	      -e 's|@''HAVE_RANDOM_R''@|$(HAVE_RANDOM_R)|g' \
+	      -e 's|@''HAVE_REALLOCARRAY''@|$(HAVE_REALLOCARRAY)|g' \
+	      -e 's|@''HAVE_REALPATH''@|$(HAVE_REALPATH)|g' \
+	      -e 's|@''HAVE_RPMATCH''@|$(HAVE_RPMATCH)|g' \
+	      -e 's|@''HAVE_SECURE_GETENV''@|$(HAVE_SECURE_GETENV)|g' \
+	      -e 's|@''HAVE_DECL_SETENV''@|$(HAVE_DECL_SETENV)|g' \
+	      -e 's|@''HAVE_SETSTATE''@|$(HAVE_SETSTATE)|g' \
+	      -e 's|@''HAVE_DECL_SETSTATE''@|$(HAVE_DECL_SETSTATE)|g' \
+	      -e 's|@''HAVE_STRTOD''@|$(HAVE_STRTOD)|g' \
+	      -e 's|@''HAVE_STRTOL''@|$(HAVE_STRTOL)|g' \
+	      -e 's|@''HAVE_STRTOLD''@|$(HAVE_STRTOLD)|g' \
+	      -e 's|@''HAVE_STRTOLL''@|$(HAVE_STRTOLL)|g' \
+	      -e 's|@''HAVE_STRTOUL''@|$(HAVE_STRTOUL)|g' \
+	      -e 's|@''HAVE_STRTOULL''@|$(HAVE_STRTOULL)|g' \
+	      -e 's|@''HAVE_STRUCT_RANDOM_DATA''@|$(HAVE_STRUCT_RANDOM_DATA)|g' \
+	      -e 's|@''HAVE_SYS_LOADAVG_H''@|$(HAVE_SYS_LOADAVG_H)|g' \
+	      -e 's|@''HAVE_UNLOCKPT''@|$(HAVE_UNLOCKPT)|g' \
+	      -e 's|@''HAVE_DECL_UNSETENV''@|$(HAVE_DECL_UNSETENV)|g' \
+	      -e 's|@''REPLACE_ALIGNED_ALLOC''@|$(REPLACE_ALIGNED_ALLOC)|g' \
+	      -e 's|@''REPLACE_CALLOC''@|$(REPLACE_CALLOC)|g' \
+	      -e 's|@''REPLACE_CANONICALIZE_FILE_NAME''@|$(REPLACE_CANONICALIZE_FILE_NAME)|g' \
+	      -e 's|@''REPLACE_FREE''@|$(REPLACE_FREE)|g' \
+	      -e 's|@''REPLACE_INITSTATE''@|$(REPLACE_INITSTATE)|g' \
+	      -e 's|@''REPLACE_MALLOC''@|$(REPLACE_MALLOC)|g' \
+	      -e 's|@''REPLACE_MBTOWC''@|$(REPLACE_MBTOWC)|g' \
+	      -e 's|@''REPLACE_MKSTEMP''@|$(REPLACE_MKSTEMP)|g' \
+	      -e 's|@''REPLACE_POSIX_MEMALIGN''@|$(REPLACE_POSIX_MEMALIGN)|g' \
+	      -e 's|@''REPLACE_PTSNAME''@|$(REPLACE_PTSNAME)|g' \
+	      -e 's|@''REPLACE_PTSNAME_R''@|$(REPLACE_PTSNAME_R)|g' \
+	      -e 's|@''REPLACE_PUTENV''@|$(REPLACE_PUTENV)|g' \
+	      -e 's|@''REPLACE_QSORT_R''@|$(REPLACE_QSORT_R)|g' \
+	      -e 's|@''REPLACE_RANDOM''@|$(REPLACE_RANDOM)|g' \
+	      -e 's|@''REPLACE_RANDOM_R''@|$(REPLACE_RANDOM_R)|g' \
+	      -e 's|@''REPLACE_REALLOC''@|$(REPLACE_REALLOC)|g' \
+	      -e 's|@''REPLACE_REALLOCARRAY''@|$(REPLACE_REALLOCARRAY)|g' \
+	      -e 's|@''REPLACE_REALPATH''@|$(REPLACE_REALPATH)|g' \
+	      -e 's|@''REPLACE_SETENV''@|$(REPLACE_SETENV)|g' \
+	      -e 's|@''REPLACE_SETSTATE''@|$(REPLACE_SETSTATE)|g' \
+	      -e 's|@''REPLACE_STRTOD''@|$(REPLACE_STRTOD)|g' \
+	      -e 's|@''REPLACE_STRTOL''@|$(REPLACE_STRTOL)|g' \
+	      -e 's|@''REPLACE_STRTOLD''@|$(REPLACE_STRTOLD)|g' \
+	      -e 's|@''REPLACE_STRTOLL''@|$(REPLACE_STRTOLL)|g' \
+	      -e 's|@''REPLACE_STRTOUL''@|$(REPLACE_STRTOUL)|g' \
+	      -e 's|@''REPLACE_STRTOULL''@|$(REPLACE_STRTOULL)|g' \
+	      -e 's|@''REPLACE_UNSETENV''@|$(REPLACE_UNSETENV)|g' \
+	      -e 's|@''REPLACE_WCTOMB''@|$(REPLACE_WCTOMB)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _Noreturn/r $(_NORETURN_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)'; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += stdlib.h stdlib.h-t
+
+EXTRA_DIST += stdlib.in.h
+
+## end   gnulib module stdlib
+
+## begin gnulib module stpcpy
+
+
+EXTRA_DIST += stpcpy.c
+
+EXTRA_libgreputils_a_SOURCES += stpcpy.c
+
+## end   gnulib module stpcpy
+
+## begin gnulib module strdup-posix
+
+
+EXTRA_DIST += strdup.c
+
+EXTRA_libgreputils_a_SOURCES += strdup.c
+
+## end   gnulib module strdup-posix
+
+## begin gnulib module streq
+
+
+EXTRA_DIST += streq.h
+
+## end   gnulib module streq
+
+## begin gnulib module strerror
+
+
+EXTRA_DIST += strerror.c
+
+EXTRA_libgreputils_a_SOURCES += strerror.c
+
+## end   gnulib module strerror
+
+## begin gnulib module strerror-override
+
+
+EXTRA_DIST += strerror-override.c strerror-override.h
+
+EXTRA_libgreputils_a_SOURCES += strerror-override.c
+
+## end   gnulib module strerror-override
+
+## begin gnulib module striconv
+
+libgreputils_a_SOURCES += striconv.h striconv.c
+if GL_COND_LIBTOOL
+endif
+
+## end   gnulib module striconv
+
+## begin gnulib module string
+
+BUILT_SOURCES += string.h
+
+# We need the following in order to create <string.h> when the system
+# doesn't have one that works with the given compiler.
+string.h: string.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_STRING_H''@|$(NEXT_STRING_H)|g' \
+	      -e 's/@''GNULIB_EXPLICIT_BZERO''@/$(GL_GNULIB_EXPLICIT_BZERO)/g' \
+	      -e 's/@''GNULIB_FFSL''@/$(GL_GNULIB_FFSL)/g' \
+	      -e 's/@''GNULIB_FFSLL''@/$(GL_GNULIB_FFSLL)/g' \
+	      -e 's/@''GNULIB_MBSLEN''@/$(GL_GNULIB_MBSLEN)/g' \
+	      -e 's/@''GNULIB_MBSNLEN''@/$(GL_GNULIB_MBSNLEN)/g' \
+	      -e 's/@''GNULIB_MBSCHR''@/$(GL_GNULIB_MBSCHR)/g' \
+	      -e 's/@''GNULIB_MBSRCHR''@/$(GL_GNULIB_MBSRCHR)/g' \
+	      -e 's/@''GNULIB_MBSSTR''@/$(GL_GNULIB_MBSSTR)/g' \
+	      -e 's/@''GNULIB_MBSCASECMP''@/$(GL_GNULIB_MBSCASECMP)/g' \
+	      -e 's/@''GNULIB_MBSNCASECMP''@/$(GL_GNULIB_MBSNCASECMP)/g' \
+	      -e 's/@''GNULIB_MBSPCASECMP''@/$(GL_GNULIB_MBSPCASECMP)/g' \
+	      -e 's/@''GNULIB_MBSCASESTR''@/$(GL_GNULIB_MBSCASESTR)/g' \
+	      -e 's/@''GNULIB_MBSCSPN''@/$(GL_GNULIB_MBSCSPN)/g' \
+	      -e 's/@''GNULIB_MBSPBRK''@/$(GL_GNULIB_MBSPBRK)/g' \
+	      -e 's/@''GNULIB_MBSSPN''@/$(GL_GNULIB_MBSSPN)/g' \
+	      -e 's/@''GNULIB_MBSSEP''@/$(GL_GNULIB_MBSSEP)/g' \
+	      -e 's/@''GNULIB_MBSTOK_R''@/$(GL_GNULIB_MBSTOK_R)/g' \
+	      -e 's/@''GNULIB_MEMCHR''@/$(GL_GNULIB_MEMCHR)/g' \
+	      -e 's/@''GNULIB_MEMMEM''@/$(GL_GNULIB_MEMMEM)/g' \
+	      -e 's/@''GNULIB_MEMPCPY''@/$(GL_GNULIB_MEMPCPY)/g' \
+	      -e 's/@''GNULIB_MEMRCHR''@/$(GL_GNULIB_MEMRCHR)/g' \
+	      -e 's/@''GNULIB_RAWMEMCHR''@/$(GL_GNULIB_RAWMEMCHR)/g' \
+	      -e 's/@''GNULIB_STPCPY''@/$(GL_GNULIB_STPCPY)/g' \
+	      -e 's/@''GNULIB_STPNCPY''@/$(GL_GNULIB_STPNCPY)/g' \
+	      -e 's/@''GNULIB_STRCHRNUL''@/$(GL_GNULIB_STRCHRNUL)/g' \
+	      -e 's/@''GNULIB_STRDUP''@/$(GL_GNULIB_STRDUP)/g' \
+	      -e 's/@''GNULIB_STRNCAT''@/$(GL_GNULIB_STRNCAT)/g' \
+	      -e 's/@''GNULIB_STRNDUP''@/$(GL_GNULIB_STRNDUP)/g' \
+	      -e 's/@''GNULIB_STRNLEN''@/$(GL_GNULIB_STRNLEN)/g' \
+	      -e 's/@''GNULIB_STRPBRK''@/$(GL_GNULIB_STRPBRK)/g' \
+	      -e 's/@''GNULIB_STRSEP''@/$(GL_GNULIB_STRSEP)/g' \
+	      -e 's/@''GNULIB_STRSTR''@/$(GL_GNULIB_STRSTR)/g' \
+	      -e 's/@''GNULIB_STRCASESTR''@/$(GL_GNULIB_STRCASESTR)/g' \
+	      -e 's/@''GNULIB_STRTOK_R''@/$(GL_GNULIB_STRTOK_R)/g' \
+	      -e 's/@''GNULIB_STRERROR''@/$(GL_GNULIB_STRERROR)/g' \
+	      -e 's/@''GNULIB_STRERROR_R''@/$(GL_GNULIB_STRERROR_R)/g' \
+	      -e 's/@''GNULIB_STRERRORNAME_NP''@/$(GL_GNULIB_STRERRORNAME_NP)/g' \
+	      -e 's/@''GNULIB_SIGABBREV_NP''@/$(GL_GNULIB_SIGABBREV_NP)/g' \
+	      -e 's/@''GNULIB_SIGDESCR_NP''@/$(GL_GNULIB_SIGDESCR_NP)/g' \
+	      -e 's/@''GNULIB_STRSIGNAL''@/$(GL_GNULIB_STRSIGNAL)/g' \
+	      -e 's/@''GNULIB_STRVERSCMP''@/$(GL_GNULIB_STRVERSCMP)/g' \
+	      -e 's/@''GNULIB_MDA_MEMCCPY''@/$(GL_GNULIB_MDA_MEMCCPY)/g' \
+	      -e 's/@''GNULIB_MDA_STRDUP''@/$(GL_GNULIB_MDA_STRDUP)/g' \
+	      < $(srcdir)/string.in.h | \
+	  sed -e 's|@''HAVE_EXPLICIT_BZERO''@|$(HAVE_EXPLICIT_BZERO)|g' \
+	      -e 's|@''HAVE_FFSL''@|$(HAVE_FFSL)|g' \
+	      -e 's|@''HAVE_FFSLL''@|$(HAVE_FFSLL)|g' \
+	      -e 's|@''HAVE_MBSLEN''@|$(HAVE_MBSLEN)|g' \
+	      -e 's|@''HAVE_DECL_MEMMEM''@|$(HAVE_DECL_MEMMEM)|g' \
+	      -e 's|@''HAVE_MEMPCPY''@|$(HAVE_MEMPCPY)|g' \
+	      -e 's|@''HAVE_DECL_MEMRCHR''@|$(HAVE_DECL_MEMRCHR)|g' \
+	      -e 's|@''HAVE_RAWMEMCHR''@|$(HAVE_RAWMEMCHR)|g' \
+	      -e 's|@''HAVE_STPCPY''@|$(HAVE_STPCPY)|g' \
+	      -e 's|@''HAVE_STPNCPY''@|$(HAVE_STPNCPY)|g' \
+	      -e 's|@''HAVE_STRCHRNUL''@|$(HAVE_STRCHRNUL)|g' \
+	      -e 's|@''HAVE_DECL_STRDUP''@|$(HAVE_DECL_STRDUP)|g' \
+	      -e 's|@''HAVE_DECL_STRNDUP''@|$(HAVE_DECL_STRNDUP)|g' \
+	      -e 's|@''HAVE_DECL_STRNLEN''@|$(HAVE_DECL_STRNLEN)|g' \
+	      -e 's|@''HAVE_STRPBRK''@|$(HAVE_STRPBRK)|g' \
+	      -e 's|@''HAVE_STRSEP''@|$(HAVE_STRSEP)|g' \
+	      -e 's|@''HAVE_STRCASESTR''@|$(HAVE_STRCASESTR)|g' \
+	      -e 's|@''HAVE_DECL_STRTOK_R''@|$(HAVE_DECL_STRTOK_R)|g' \
+	      -e 's|@''HAVE_DECL_STRERROR_R''@|$(HAVE_DECL_STRERROR_R)|g' \
+	      -e 's|@''HAVE_STRERRORNAME_NP''@|$(HAVE_STRERRORNAME_NP)|g' \
+	      -e 's|@''HAVE_SIGABBREV_NP''@|$(HAVE_SIGABBREV_NP)|g' \
+	      -e 's|@''HAVE_SIGDESCR_NP''@|$(HAVE_SIGDESCR_NP)|g' \
+	      -e 's|@''HAVE_DECL_STRSIGNAL''@|$(HAVE_DECL_STRSIGNAL)|g' \
+	      -e 's|@''HAVE_STRVERSCMP''@|$(HAVE_STRVERSCMP)|g' \
+	      -e 's|@''REPLACE_FFSLL''@|$(REPLACE_FFSLL)|g' \
+	      -e 's|@''REPLACE_MEMCHR''@|$(REPLACE_MEMCHR)|g' \
+	      -e 's|@''REPLACE_MEMMEM''@|$(REPLACE_MEMMEM)|g' \
+	      -e 's|@''REPLACE_STPNCPY''@|$(REPLACE_STPNCPY)|g' \
+	      -e 's|@''REPLACE_STRCHRNUL''@|$(REPLACE_STRCHRNUL)|g' \
+	      -e 's|@''REPLACE_STRDUP''@|$(REPLACE_STRDUP)|g' \
+	      -e 's|@''REPLACE_STRNCAT''@|$(REPLACE_STRNCAT)|g' \
+	      -e 's|@''REPLACE_STRNDUP''@|$(REPLACE_STRNDUP)|g' \
+	      -e 's|@''REPLACE_STRNLEN''@|$(REPLACE_STRNLEN)|g' \
+	      -e 's|@''REPLACE_STRSTR''@|$(REPLACE_STRSTR)|g' \
+	      -e 's|@''REPLACE_STRCASESTR''@|$(REPLACE_STRCASESTR)|g' \
+	      -e 's|@''REPLACE_STRTOK_R''@|$(REPLACE_STRTOK_R)|g' \
+	      -e 's|@''REPLACE_STRERROR''@|$(REPLACE_STRERROR)|g' \
+	      -e 's|@''REPLACE_STRERROR_R''@|$(REPLACE_STRERROR_R)|g' \
+	      -e 's|@''REPLACE_STRERRORNAME_NP''@|$(REPLACE_STRERRORNAME_NP)|g' \
+	      -e 's|@''REPLACE_STRSIGNAL''@|$(REPLACE_STRSIGNAL)|g' \
+	      -e 's|@''UNDEFINE_STRTOK_R''@|$(UNDEFINE_STRTOK_R)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)'; \
+	      < $(srcdir)/string.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += string.h string.h-t
+
+EXTRA_DIST += string.in.h
+
+## end   gnulib module string
+
+## begin gnulib module strnlen
+
+
+EXTRA_DIST += strnlen.c
+
+EXTRA_libgreputils_a_SOURCES += strnlen.c
+
+## end   gnulib module strnlen
+
+## begin gnulib module strnlen1
+
+libgreputils_a_SOURCES += strnlen1.h strnlen1.c
+
+## end   gnulib module strnlen1
+
+## begin gnulib module strstr
+
+
+EXTRA_DIST += strstr.c
+
+EXTRA_libgreputils_a_SOURCES += strstr.c
+
+## end   gnulib module strstr
+
+## begin gnulib module strstr-simple
+
+
+EXTRA_DIST += str-two-way.h strstr.c
+
+EXTRA_libgreputils_a_SOURCES += strstr.c
+
+## end   gnulib module strstr-simple
+
+## begin gnulib module strtoimax
+
+
+EXTRA_DIST += strtoimax.c
+
+EXTRA_libgreputils_a_SOURCES += strtoimax.c
+
+## end   gnulib module strtoimax
+
+## begin gnulib module strtoll
+
+
+EXTRA_DIST += strtol.c strtoll.c
+
+EXTRA_libgreputils_a_SOURCES += strtol.c strtoll.c
+
+## end   gnulib module strtoll
+
+## begin gnulib module strtoull
+
+
+EXTRA_DIST += strtol.c strtoul.c strtoull.c
+
+EXTRA_libgreputils_a_SOURCES += strtol.c strtoul.c strtoull.c
+
+## end   gnulib module strtoull
+
+## begin gnulib module strtoumax
+
+
+EXTRA_DIST += strtoimax.c strtoumax.c
+
+EXTRA_libgreputils_a_SOURCES += strtoimax.c strtoumax.c
+
+## end   gnulib module strtoumax
+
+## begin gnulib module sys_stat
+
+BUILT_SOURCES += sys/stat.h
+
+# We need the following in order to create <sys/stat.h> when the system
+# has one that is incomplete.
+sys/stat.h: sys_stat.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_at)$(MKDIR_P) sys
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SYS_STAT_H''@|$(NEXT_SYS_STAT_H)|g' \
+	      -e 's|@''WINDOWS_64_BIT_ST_SIZE''@|$(WINDOWS_64_BIT_ST_SIZE)|g' \
+	      -e 's|@''WINDOWS_STAT_TIMESPEC''@|$(WINDOWS_STAT_TIMESPEC)|g' \
+	      -e 's/@''GNULIB_FCHMODAT''@/$(GL_GNULIB_FCHMODAT)/g' \
+	      -e 's/@''GNULIB_FSTAT''@/$(GL_GNULIB_FSTAT)/g' \
+	      -e 's/@''GNULIB_FSTATAT''@/$(GL_GNULIB_FSTATAT)/g' \
+	      -e 's/@''GNULIB_FUTIMENS''@/$(GL_GNULIB_FUTIMENS)/g' \
+	      -e 's/@''GNULIB_GETUMASK''@/$(GL_GNULIB_GETUMASK)/g' \
+	      -e 's/@''GNULIB_LCHMOD''@/$(GL_GNULIB_LCHMOD)/g' \
+	      -e 's/@''GNULIB_LSTAT''@/$(GL_GNULIB_LSTAT)/g' \
+	      -e 's/@''GNULIB_MKDIR''@/$(GL_GNULIB_MKDIR)/g' \
+	      -e 's/@''GNULIB_MKDIRAT''@/$(GL_GNULIB_MKDIRAT)/g' \
+	      -e 's/@''GNULIB_MKFIFO''@/$(GL_GNULIB_MKFIFO)/g' \
+	      -e 's/@''GNULIB_MKFIFOAT''@/$(GL_GNULIB_MKFIFOAT)/g' \
+	      -e 's/@''GNULIB_MKNOD''@/$(GL_GNULIB_MKNOD)/g' \
+	      -e 's/@''GNULIB_MKNODAT''@/$(GL_GNULIB_MKNODAT)/g' \
+	      -e 's/@''GNULIB_STAT''@/$(GL_GNULIB_STAT)/g' \
+	      -e 's/@''GNULIB_UTIMENSAT''@/$(GL_GNULIB_UTIMENSAT)/g' \
+	      -e 's/@''GNULIB_OVERRIDES_STRUCT_STAT''@/$(GL_GNULIB_OVERRIDES_STRUCT_STAT)/g' \
+	      -e 's/@''GNULIB_MDA_CHMOD''@/$(GL_GNULIB_MDA_CHMOD)/g' \
+	      -e 's/@''GNULIB_MDA_MKDIR''@/$(GL_GNULIB_MDA_MKDIR)/g' \
+	      -e 's/@''GNULIB_MDA_UMASK''@/$(GL_GNULIB_MDA_UMASK)/g' \
+	      -e 's|@''HAVE_FCHMODAT''@|$(HAVE_FCHMODAT)|g' \
+	      -e 's|@''HAVE_FSTATAT''@|$(HAVE_FSTATAT)|g' \
+	      -e 's|@''HAVE_FUTIMENS''@|$(HAVE_FUTIMENS)|g' \
+	      -e 's|@''HAVE_GETUMASK''@|$(HAVE_GETUMASK)|g' \
+	      -e 's|@''HAVE_LCHMOD''@|$(HAVE_LCHMOD)|g' \
+	      -e 's|@''HAVE_LSTAT''@|$(HAVE_LSTAT)|g' \
+	      -e 's|@''HAVE_MKDIRAT''@|$(HAVE_MKDIRAT)|g' \
+	      -e 's|@''HAVE_MKFIFO''@|$(HAVE_MKFIFO)|g' \
+	      -e 's|@''HAVE_MKFIFOAT''@|$(HAVE_MKFIFOAT)|g' \
+	      -e 's|@''HAVE_MKNOD''@|$(HAVE_MKNOD)|g' \
+	      -e 's|@''HAVE_MKNODAT''@|$(HAVE_MKNODAT)|g' \
+	      -e 's|@''HAVE_UTIMENSAT''@|$(HAVE_UTIMENSAT)|g' \
+	      -e 's|@''REPLACE_FCHMODAT''@|$(REPLACE_FCHMODAT)|g' \
+	      -e 's|@''REPLACE_FSTAT''@|$(REPLACE_FSTAT)|g' \
+	      -e 's|@''REPLACE_FSTATAT''@|$(REPLACE_FSTATAT)|g' \
+	      -e 's|@''REPLACE_FUTIMENS''@|$(REPLACE_FUTIMENS)|g' \
+	      -e 's|@''REPLACE_LSTAT''@|$(REPLACE_LSTAT)|g' \
+	      -e 's|@''REPLACE_MKDIR''@|$(REPLACE_MKDIR)|g' \
+	      -e 's|@''REPLACE_MKFIFO''@|$(REPLACE_MKFIFO)|g' \
+	      -e 's|@''REPLACE_MKFIFOAT''@|$(REPLACE_MKFIFOAT)|g' \
+	      -e 's|@''REPLACE_MKNOD''@|$(REPLACE_MKNOD)|g' \
+	      -e 's|@''REPLACE_MKNODAT''@|$(REPLACE_MKNODAT)|g' \
+	      -e 's|@''REPLACE_STAT''@|$(REPLACE_STAT)|g' \
+	      -e 's|@''REPLACE_UTIMENSAT''@|$(REPLACE_UTIMENSAT)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/sys_stat.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += sys/stat.h sys/stat.h-t
+MOSTLYCLEANDIRS += sys
+
+EXTRA_DIST += sys_stat.in.h
+
+## end   gnulib module sys_stat
+
+## begin gnulib module sys_types
+
+BUILT_SOURCES += sys/types.h
+
+# We need the following in order to create <sys/types.h> when the system
+# doesn't have one that works with the given compiler.
+sys/types.h: sys_types.in.h $(top_builddir)/config.status
+	$(AM_V_at)$(MKDIR_P) sys
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SYS_TYPES_H''@|$(NEXT_SYS_TYPES_H)|g' \
+	      -e 's|@''WINDOWS_64_BIT_OFF_T''@|$(WINDOWS_64_BIT_OFF_T)|g' \
+	      -e 's|@''WINDOWS_STAT_INODES''@|$(WINDOWS_STAT_INODES)|g' \
+	      < $(srcdir)/sys_types.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += sys/types.h sys/types.h-t
+
+EXTRA_DIST += sys_types.in.h
+
+## end   gnulib module sys_types
+
+## begin gnulib module threadlib
+
+libgreputils_a_SOURCES += glthread/threadlib.c
+
+## end   gnulib module threadlib
+
+## begin gnulib module time
+
+BUILT_SOURCES += time.h
+
+# We need the following in order to create <time.h> when the system
+# doesn't have one that works with the given compiler.
+time.h: time.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_TIME_H''@|$(NEXT_TIME_H)|g' \
+	      -e 's/@''GNULIB_CTIME''@/$(GL_GNULIB_CTIME)/g' \
+	      -e 's/@''GNULIB_LOCALTIME''@/$(GL_GNULIB_LOCALTIME)/g' \
+	      -e 's/@''GNULIB_MKTIME''@/$(GL_GNULIB_MKTIME)/g' \
+	      -e 's/@''GNULIB_NANOSLEEP''@/$(GL_GNULIB_NANOSLEEP)/g' \
+	      -e 's/@''GNULIB_STRFTIME''@/$(GL_GNULIB_STRFTIME)/g' \
+	      -e 's/@''GNULIB_STRPTIME''@/$(GL_GNULIB_STRPTIME)/g' \
+	      -e 's/@''GNULIB_TIMEGM''@/$(GL_GNULIB_TIMEGM)/g' \
+	      -e 's/@''GNULIB_TIMESPEC_GET''@/$(GL_GNULIB_TIMESPEC_GET)/g' \
+	      -e 's/@''GNULIB_TIME_R''@/$(GL_GNULIB_TIME_R)/g' \
+	      -e 's/@''GNULIB_TIME_RZ''@/$(GL_GNULIB_TIME_RZ)/g' \
+	      -e 's/@''GNULIB_TZSET''@/$(GL_GNULIB_TZSET)/g' \
+	      -e 's/@''GNULIB_MDA_TZSET''@/$(GL_GNULIB_MDA_TZSET)/g' \
+	      -e 's|@''HAVE_DECL_LOCALTIME_R''@|$(HAVE_DECL_LOCALTIME_R)|g' \
+	      -e 's|@''HAVE_NANOSLEEP''@|$(HAVE_NANOSLEEP)|g' \
+	      -e 's|@''HAVE_STRPTIME''@|$(HAVE_STRPTIME)|g' \
+	      -e 's|@''HAVE_TIMEGM''@|$(HAVE_TIMEGM)|g' \
+	      -e 's|@''HAVE_TIMESPEC_GET''@|$(HAVE_TIMESPEC_GET)|g' \
+	      -e 's|@''HAVE_TIMEZONE_T''@|$(HAVE_TIMEZONE_T)|g' \
+	      -e 's|@''REPLACE_CTIME''@|$(REPLACE_CTIME)|g' \
+	      -e 's|@''REPLACE_GMTIME''@|$(REPLACE_GMTIME)|g' \
+	      -e 's|@''REPLACE_LOCALTIME''@|$(REPLACE_LOCALTIME)|g' \
+	      -e 's|@''REPLACE_LOCALTIME_R''@|$(REPLACE_LOCALTIME_R)|g' \
+	      -e 's|@''REPLACE_MKTIME''@|$(REPLACE_MKTIME)|g' \
+	      -e 's|@''REPLACE_NANOSLEEP''@|$(REPLACE_NANOSLEEP)|g' \
+	      -e 's|@''REPLACE_STRFTIME''@|$(REPLACE_STRFTIME)|g' \
+	      -e 's|@''REPLACE_TIMEGM''@|$(REPLACE_TIMEGM)|g' \
+	      -e 's|@''REPLACE_TZSET''@|$(REPLACE_TZSET)|g' \
+	      -e 's|@''PTHREAD_H_DEFINES_STRUCT_TIMESPEC''@|$(PTHREAD_H_DEFINES_STRUCT_TIMESPEC)|g' \
+	      -e 's|@''SYS_TIME_H_DEFINES_STRUCT_TIMESPEC''@|$(SYS_TIME_H_DEFINES_STRUCT_TIMESPEC)|g' \
+	      -e 's|@''TIME_H_DEFINES_STRUCT_TIMESPEC''@|$(TIME_H_DEFINES_STRUCT_TIMESPEC)|g' \
+	      -e 's|@''UNISTD_H_DEFINES_STRUCT_TIMESPEC''@|$(UNISTD_H_DEFINES_STRUCT_TIMESPEC)|g' \
+	      -e 's|@''TIME_H_DEFINES_TIME_UTC''@|$(TIME_H_DEFINES_TIME_UTC)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/time.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += time.h time.h-t
+
+EXTRA_DIST += time.in.h
+
+## end   gnulib module time
+
+## begin gnulib module trim
+
+libgreputils_a_SOURCES += trim.c
+
+EXTRA_DIST += trim.h
+
+## end   gnulib module trim
+
+## begin gnulib module unistd
+
+BUILT_SOURCES += unistd.h
+libgreputils_a_SOURCES += unistd.c
+
+# We need the following in order to create an empty placeholder for
+# <unistd.h> when the system doesn't have one.
+unistd.h: unistd.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''HAVE_UNISTD_H''@|$(HAVE_UNISTD_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_UNISTD_H''@|$(NEXT_UNISTD_H)|g' \
+	      -e 's|@''WINDOWS_64_BIT_OFF_T''@|$(WINDOWS_64_BIT_OFF_T)|g' \
+	      -e 's/@''GNULIB_ACCESS''@/$(GL_GNULIB_ACCESS)/g' \
+	      -e 's/@''GNULIB_CHDIR''@/$(GL_GNULIB_CHDIR)/g' \
+	      -e 's/@''GNULIB_CHOWN''@/$(GL_GNULIB_CHOWN)/g' \
+	      -e 's/@''GNULIB_CLOSE''@/$(GL_GNULIB_CLOSE)/g' \
+	      -e 's/@''GNULIB_COPY_FILE_RANGE''@/$(GL_GNULIB_COPY_FILE_RANGE)/g' \
+	      -e 's/@''GNULIB_DUP''@/$(GL_GNULIB_DUP)/g' \
+	      -e 's/@''GNULIB_DUP2''@/$(GL_GNULIB_DUP2)/g' \
+	      -e 's/@''GNULIB_DUP3''@/$(GL_GNULIB_DUP3)/g' \
+	      -e 's/@''GNULIB_ENVIRON''@/$(GL_GNULIB_ENVIRON)/g' \
+	      -e 's/@''GNULIB_EUIDACCESS''@/$(GL_GNULIB_EUIDACCESS)/g' \
+	      -e 's/@''GNULIB_EXECL''@/$(GL_GNULIB_EXECL)/g' \
+	      -e 's/@''GNULIB_EXECLE''@/$(GL_GNULIB_EXECLE)/g' \
+	      -e 's/@''GNULIB_EXECLP''@/$(GL_GNULIB_EXECLP)/g' \
+	      -e 's/@''GNULIB_EXECV''@/$(GL_GNULIB_EXECV)/g' \
+	      -e 's/@''GNULIB_EXECVE''@/$(GL_GNULIB_EXECVE)/g' \
+	      -e 's/@''GNULIB_EXECVP''@/$(GL_GNULIB_EXECVP)/g' \
+	      -e 's/@''GNULIB_EXECVPE''@/$(GL_GNULIB_EXECVPE)/g' \
+	      -e 's/@''GNULIB_FACCESSAT''@/$(GL_GNULIB_FACCESSAT)/g' \
+	      -e 's/@''GNULIB_FCHDIR''@/$(GL_GNULIB_FCHDIR)/g' \
+	      -e 's/@''GNULIB_FCHOWNAT''@/$(GL_GNULIB_FCHOWNAT)/g' \
+	      -e 's/@''GNULIB_FDATASYNC''@/$(GL_GNULIB_FDATASYNC)/g' \
+	      -e 's/@''GNULIB_FSYNC''@/$(GL_GNULIB_FSYNC)/g' \
+	      -e 's/@''GNULIB_FTRUNCATE''@/$(GL_GNULIB_FTRUNCATE)/g' \
+	      -e 's/@''GNULIB_GETCWD''@/$(GL_GNULIB_GETCWD)/g' \
+	      -e 's/@''GNULIB_GETDOMAINNAME''@/$(GL_GNULIB_GETDOMAINNAME)/g' \
+	      -e 's/@''GNULIB_GETDTABLESIZE''@/$(GL_GNULIB_GETDTABLESIZE)/g' \
+	      -e 's/@''GNULIB_GETENTROPY''@/$(GL_GNULIB_GETENTROPY)/g' \
+	      -e 's/@''GNULIB_GETGROUPS''@/$(GL_GNULIB_GETGROUPS)/g' \
+	      -e 's/@''GNULIB_GETHOSTNAME''@/$(GL_GNULIB_GETHOSTNAME)/g' \
+	      -e 's/@''GNULIB_GETLOGIN''@/$(GL_GNULIB_GETLOGIN)/g' \
+	      -e 's/@''GNULIB_GETLOGIN_R''@/$(GL_GNULIB_GETLOGIN_R)/g' \
+	      -e 's/@''GNULIB_GETOPT_POSIX''@/$(GL_GNULIB_GETOPT_POSIX)/g' \
+	      -e 's/@''GNULIB_GETPAGESIZE''@/$(GL_GNULIB_GETPAGESIZE)/g' \
+	      -e 's/@''GNULIB_GETPASS''@/$(GL_GNULIB_GETPASS)/g' \
+	      -e 's/@''GNULIB_GETUSERSHELL''@/$(GL_GNULIB_GETUSERSHELL)/g' \
+	      -e 's/@''GNULIB_GROUP_MEMBER''@/$(GL_GNULIB_GROUP_MEMBER)/g' \
+	      -e 's/@''GNULIB_ISATTY''@/$(GL_GNULIB_ISATTY)/g' \
+	      -e 's/@''GNULIB_LCHOWN''@/$(GL_GNULIB_LCHOWN)/g' \
+	      -e 's/@''GNULIB_LINK''@/$(GL_GNULIB_LINK)/g' \
+	      -e 's/@''GNULIB_LINKAT''@/$(GL_GNULIB_LINKAT)/g' \
+	      -e 's/@''GNULIB_LSEEK''@/$(GL_GNULIB_LSEEK)/g' \
+	      -e 's/@''GNULIB_PIPE''@/$(GL_GNULIB_PIPE)/g' \
+	      -e 's/@''GNULIB_PIPE2''@/$(GL_GNULIB_PIPE2)/g' \
+	      -e 's/@''GNULIB_PREAD''@/$(GL_GNULIB_PREAD)/g' \
+	      -e 's/@''GNULIB_PWRITE''@/$(GL_GNULIB_PWRITE)/g' \
+	      -e 's/@''GNULIB_READ''@/$(GL_GNULIB_READ)/g' \
+	      -e 's/@''GNULIB_READLINK''@/$(GL_GNULIB_READLINK)/g' \
+	      -e 's/@''GNULIB_READLINKAT''@/$(GL_GNULIB_READLINKAT)/g' \
+	      -e 's/@''GNULIB_RMDIR''@/$(GL_GNULIB_RMDIR)/g' \
+	      -e 's/@''GNULIB_SETHOSTNAME''@/$(GL_GNULIB_SETHOSTNAME)/g' \
+	      -e 's/@''GNULIB_SLEEP''@/$(GL_GNULIB_SLEEP)/g' \
+	      -e 's/@''GNULIB_SYMLINK''@/$(GL_GNULIB_SYMLINK)/g' \
+	      -e 's/@''GNULIB_SYMLINKAT''@/$(GL_GNULIB_SYMLINKAT)/g' \
+	      -e 's/@''GNULIB_TRUNCATE''@/$(GL_GNULIB_TRUNCATE)/g' \
+	      -e 's/@''GNULIB_TTYNAME_R''@/$(GL_GNULIB_TTYNAME_R)/g' \
+	      -e 's/@''GNULIB_UNISTD_H_GETOPT''@/0$(GL_GNULIB_UNISTD_H_GETOPT)/g' \
+	      -e 's/@''GNULIB_UNISTD_H_NONBLOCKING''@/$(GL_GNULIB_UNISTD_H_NONBLOCKING)/g' \
+	      -e 's/@''GNULIB_UNISTD_H_SIGPIPE''@/$(GL_GNULIB_UNISTD_H_SIGPIPE)/g' \
+	      -e 's/@''GNULIB_UNLINK''@/$(GL_GNULIB_UNLINK)/g' \
+	      -e 's/@''GNULIB_UNLINKAT''@/$(GL_GNULIB_UNLINKAT)/g' \
+	      -e 's/@''GNULIB_USLEEP''@/$(GL_GNULIB_USLEEP)/g' \
+	      -e 's/@''GNULIB_WRITE''@/$(GL_GNULIB_WRITE)/g' \
+	      -e 's/@''GNULIB_MDA_ACCESS''@/$(GL_GNULIB_MDA_ACCESS)/g' \
+	      -e 's/@''GNULIB_MDA_CHDIR''@/$(GL_GNULIB_MDA_CHDIR)/g' \
+	      -e 's/@''GNULIB_MDA_CLOSE''@/$(GL_GNULIB_MDA_CLOSE)/g' \
+	      -e 's/@''GNULIB_MDA_DUP''@/$(GL_GNULIB_MDA_DUP)/g' \
+	      -e 's/@''GNULIB_MDA_DUP2''@/$(GL_GNULIB_MDA_DUP2)/g' \
+	      -e 's/@''GNULIB_MDA_EXECL''@/$(GL_GNULIB_MDA_EXECL)/g' \
+	      -e 's/@''GNULIB_MDA_EXECLE''@/$(GL_GNULIB_MDA_EXECLE)/g' \
+	      -e 's/@''GNULIB_MDA_EXECLP''@/$(GL_GNULIB_MDA_EXECLP)/g' \
+	      -e 's/@''GNULIB_MDA_EXECV''@/$(GL_GNULIB_MDA_EXECV)/g' \
+	      -e 's/@''GNULIB_MDA_EXECVE''@/$(GL_GNULIB_MDA_EXECVE)/g' \
+	      -e 's/@''GNULIB_MDA_EXECVP''@/$(GL_GNULIB_MDA_EXECVP)/g' \
+	      -e 's/@''GNULIB_MDA_EXECVPE''@/$(GL_GNULIB_MDA_EXECVPE)/g' \
+	      -e 's/@''GNULIB_MDA_GETCWD''@/$(GL_GNULIB_MDA_GETCWD)/g' \
+	      -e 's/@''GNULIB_MDA_GETPID''@/$(GL_GNULIB_MDA_GETPID)/g' \
+	      -e 's/@''GNULIB_MDA_ISATTY''@/$(GL_GNULIB_MDA_ISATTY)/g' \
+	      -e 's/@''GNULIB_MDA_LSEEK''@/$(GL_GNULIB_MDA_LSEEK)/g' \
+	      -e 's/@''GNULIB_MDA_READ''@/$(GL_GNULIB_MDA_READ)/g' \
+	      -e 's/@''GNULIB_MDA_RMDIR''@/$(GL_GNULIB_MDA_RMDIR)/g' \
+	      -e 's/@''GNULIB_MDA_SWAB''@/$(GL_GNULIB_MDA_SWAB)/g' \
+	      -e 's/@''GNULIB_MDA_UNLINK''@/$(GL_GNULIB_MDA_UNLINK)/g' \
+	      -e 's/@''GNULIB_MDA_WRITE''@/$(GL_GNULIB_MDA_WRITE)/g' \
+	      < $(srcdir)/unistd.in.h | \
+	  sed -e 's|@''HAVE_CHOWN''@|$(HAVE_CHOWN)|g' \
+	      -e 's|@''HAVE_COPY_FILE_RANGE''@|$(HAVE_COPY_FILE_RANGE)|g' \
+	      -e 's|@''HAVE_DUP3''@|$(HAVE_DUP3)|g' \
+	      -e 's|@''HAVE_EUIDACCESS''@|$(HAVE_EUIDACCESS)|g' \
+	      -e 's|@''HAVE_EXECVPE''@|$(HAVE_EXECVPE)|g' \
+	      -e 's|@''HAVE_FACCESSAT''@|$(HAVE_FACCESSAT)|g' \
+	      -e 's|@''HAVE_FCHDIR''@|$(HAVE_FCHDIR)|g' \
+	      -e 's|@''HAVE_FCHOWNAT''@|$(HAVE_FCHOWNAT)|g' \
+	      -e 's|@''HAVE_FDATASYNC''@|$(HAVE_FDATASYNC)|g' \
+	      -e 's|@''HAVE_FSYNC''@|$(HAVE_FSYNC)|g' \
+	      -e 's|@''HAVE_FTRUNCATE''@|$(HAVE_FTRUNCATE)|g' \
+	      -e 's|@''HAVE_GETDTABLESIZE''@|$(HAVE_GETDTABLESIZE)|g' \
+	      -e 's|@''HAVE_GETENTROPY''@|$(HAVE_GETENTROPY)|g' \
+	      -e 's|@''HAVE_GETGROUPS''@|$(HAVE_GETGROUPS)|g' \
+	      -e 's|@''HAVE_GETHOSTNAME''@|$(HAVE_GETHOSTNAME)|g' \
+	      -e 's|@''HAVE_GETPAGESIZE''@|$(HAVE_GETPAGESIZE)|g' \
+	      -e 's|@''HAVE_GETPASS''@|$(HAVE_GETPASS)|g' \
+	      -e 's|@''HAVE_GROUP_MEMBER''@|$(HAVE_GROUP_MEMBER)|g' \
+	      -e 's|@''HAVE_LCHOWN''@|$(HAVE_LCHOWN)|g' \
+	      -e 's|@''HAVE_LINK''@|$(HAVE_LINK)|g' \
+	      -e 's|@''HAVE_LINKAT''@|$(HAVE_LINKAT)|g' \
+	      -e 's|@''HAVE_PIPE''@|$(HAVE_PIPE)|g' \
+	      -e 's|@''HAVE_PIPE2''@|$(HAVE_PIPE2)|g' \
+	      -e 's|@''HAVE_PREAD''@|$(HAVE_PREAD)|g' \
+	      -e 's|@''HAVE_PWRITE''@|$(HAVE_PWRITE)|g' \
+	      -e 's|@''HAVE_READLINK''@|$(HAVE_READLINK)|g' \
+	      -e 's|@''HAVE_READLINKAT''@|$(HAVE_READLINKAT)|g' \
+	      -e 's|@''HAVE_SETHOSTNAME''@|$(HAVE_SETHOSTNAME)|g' \
+	      -e 's|@''HAVE_SLEEP''@|$(HAVE_SLEEP)|g' \
+	      -e 's|@''HAVE_SYMLINK''@|$(HAVE_SYMLINK)|g' \
+	      -e 's|@''HAVE_SYMLINKAT''@|$(HAVE_SYMLINKAT)|g' \
+	      -e 's|@''HAVE_UNLINKAT''@|$(HAVE_UNLINKAT)|g' \
+	      -e 's|@''HAVE_USLEEP''@|$(HAVE_USLEEP)|g' \
+	      -e 's|@''HAVE_DECL_ENVIRON''@|$(HAVE_DECL_ENVIRON)|g' \
+	      -e 's|@''HAVE_DECL_EXECVPE''@|$(HAVE_DECL_EXECVPE)|g' \
+	      -e 's|@''HAVE_DECL_FCHDIR''@|$(HAVE_DECL_FCHDIR)|g' \
+	      -e 's|@''HAVE_DECL_FDATASYNC''@|$(HAVE_DECL_FDATASYNC)|g' \
+	      -e 's|@''HAVE_DECL_GETDOMAINNAME''@|$(HAVE_DECL_GETDOMAINNAME)|g' \
+	      -e 's|@''HAVE_DECL_GETLOGIN''@|$(HAVE_DECL_GETLOGIN)|g' \
+	      -e 's|@''HAVE_DECL_GETLOGIN_R''@|$(HAVE_DECL_GETLOGIN_R)|g' \
+	      -e 's|@''HAVE_DECL_GETPAGESIZE''@|$(HAVE_DECL_GETPAGESIZE)|g' \
+	      -e 's|@''HAVE_DECL_GETUSERSHELL''@|$(HAVE_DECL_GETUSERSHELL)|g' \
+	      -e 's|@''HAVE_DECL_SETHOSTNAME''@|$(HAVE_DECL_SETHOSTNAME)|g' \
+	      -e 's|@''HAVE_DECL_TRUNCATE''@|$(HAVE_DECL_TRUNCATE)|g' \
+	      -e 's|@''HAVE_DECL_TTYNAME_R''@|$(HAVE_DECL_TTYNAME_R)|g' \
+	      -e 's|@''HAVE_OS_H''@|$(HAVE_OS_H)|g' \
+	      -e 's|@''HAVE_SYS_PARAM_H''@|$(HAVE_SYS_PARAM_H)|g' \
+	  | \
+	  sed -e 's|@''REPLACE_ACCESS''@|$(REPLACE_ACCESS)|g' \
+	      -e 's|@''REPLACE_CHOWN''@|$(REPLACE_CHOWN)|g' \
+	      -e 's|@''REPLACE_CLOSE''@|$(REPLACE_CLOSE)|g' \
+	      -e 's|@''REPLACE_DUP''@|$(REPLACE_DUP)|g' \
+	      -e 's|@''REPLACE_DUP2''@|$(REPLACE_DUP2)|g' \
+	      -e 's|@''REPLACE_EXECL''@|$(REPLACE_EXECL)|g' \
+	      -e 's|@''REPLACE_EXECLE''@|$(REPLACE_EXECLE)|g' \
+	      -e 's|@''REPLACE_EXECLP''@|$(REPLACE_EXECLP)|g' \
+	      -e 's|@''REPLACE_EXECV''@|$(REPLACE_EXECV)|g' \
+	      -e 's|@''REPLACE_EXECVE''@|$(REPLACE_EXECVE)|g' \
+	      -e 's|@''REPLACE_EXECVP''@|$(REPLACE_EXECVP)|g' \
+	      -e 's|@''REPLACE_EXECVPE''@|$(REPLACE_EXECVPE)|g' \
+	      -e 's|@''REPLACE_FACCESSAT''@|$(REPLACE_FACCESSAT)|g' \
+	      -e 's|@''REPLACE_FCHOWNAT''@|$(REPLACE_FCHOWNAT)|g' \
+	      -e 's|@''REPLACE_FTRUNCATE''@|$(REPLACE_FTRUNCATE)|g' \
+	      -e 's|@''REPLACE_GETCWD''@|$(REPLACE_GETCWD)|g' \
+	      -e 's|@''REPLACE_GETDOMAINNAME''@|$(REPLACE_GETDOMAINNAME)|g' \
+	      -e 's|@''REPLACE_GETDTABLESIZE''@|$(REPLACE_GETDTABLESIZE)|g' \
+	      -e 's|@''REPLACE_GETLOGIN_R''@|$(REPLACE_GETLOGIN_R)|g' \
+	      -e 's|@''REPLACE_GETGROUPS''@|$(REPLACE_GETGROUPS)|g' \
+	      -e 's|@''REPLACE_GETPAGESIZE''@|$(REPLACE_GETPAGESIZE)|g' \
+	      -e 's|@''REPLACE_GETPASS''@|$(REPLACE_GETPASS)|g' \
+	      -e 's|@''REPLACE_ISATTY''@|$(REPLACE_ISATTY)|g' \
+	      -e 's|@''REPLACE_LCHOWN''@|$(REPLACE_LCHOWN)|g' \
+	      -e 's|@''REPLACE_LINK''@|$(REPLACE_LINK)|g' \
+	      -e 's|@''REPLACE_LINKAT''@|$(REPLACE_LINKAT)|g' \
+	      -e 's|@''REPLACE_LSEEK''@|$(REPLACE_LSEEK)|g' \
+	      -e 's|@''REPLACE_PREAD''@|$(REPLACE_PREAD)|g' \
+	      -e 's|@''REPLACE_PWRITE''@|$(REPLACE_PWRITE)|g' \
+	      -e 's|@''REPLACE_READ''@|$(REPLACE_READ)|g' \
+	      -e 's|@''REPLACE_READLINK''@|$(REPLACE_READLINK)|g' \
+	      -e 's|@''REPLACE_READLINKAT''@|$(REPLACE_READLINKAT)|g' \
+	      -e 's|@''REPLACE_RMDIR''@|$(REPLACE_RMDIR)|g' \
+	      -e 's|@''REPLACE_SLEEP''@|$(REPLACE_SLEEP)|g' \
+	      -e 's|@''REPLACE_SYMLINK''@|$(REPLACE_SYMLINK)|g' \
+	      -e 's|@''REPLACE_SYMLINKAT''@|$(REPLACE_SYMLINKAT)|g' \
+	      -e 's|@''REPLACE_TRUNCATE''@|$(REPLACE_TRUNCATE)|g' \
+	      -e 's|@''REPLACE_TTYNAME_R''@|$(REPLACE_TTYNAME_R)|g' \
+	      -e 's|@''REPLACE_UNLINK''@|$(REPLACE_UNLINK)|g' \
+	      -e 's|@''REPLACE_UNLINKAT''@|$(REPLACE_UNLINKAT)|g' \
+	      -e 's|@''REPLACE_USLEEP''@|$(REPLACE_USLEEP)|g' \
+	      -e 's|@''REPLACE_WRITE''@|$(REPLACE_WRITE)|g' \
+	      -e 's|@''UNISTD_H_HAVE_SYS_RANDOM_H''@|$(UNISTD_H_HAVE_SYS_RANDOM_H)|g' \
+	      -e 's|@''UNISTD_H_HAVE_WINSOCK2_H''@|$(UNISTD_H_HAVE_WINSOCK2_H)|g' \
+	      -e 's|@''UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS''@|$(UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)'; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += unistd.h unistd.h-t
+
+EXTRA_DIST += unistd.in.h
+
+## end   gnulib module unistd
+
+## begin gnulib module unistd-safer
+
+libgreputils_a_SOURCES += dup-safer.c fd-safer.c pipe-safer.c
+
+EXTRA_DIST += unistd--.h unistd-safer.h
+
+## end   gnulib module unistd-safer
+
+## begin gnulib module unistr/base
+
+BUILT_SOURCES += $(LIBUNISTRING_UNISTR_H)
+
+unistr.h: unistr.in.h
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  cat $(srcdir)/unistr.in.h; \
+	} > $@-t && \
+	mv -f $@-t $@
+MOSTLYCLEANFILES += unistr.h unistr.h-t
+
+EXTRA_DIST += unistr.in.h
+
+## end   gnulib module unistr/base
+
+## begin gnulib module unistr/u8-mbtoucr
+
+if LIBUNISTRING_COMPILE_UNISTR_U8_MBTOUCR
+libgreputils_a_SOURCES += unistr/u8-mbtoucr.c
+endif
+
+## end   gnulib module unistr/u8-mbtoucr
+
+## begin gnulib module unistr/u8-uctomb
+
+if LIBUNISTRING_COMPILE_UNISTR_U8_UCTOMB
+libgreputils_a_SOURCES += unistr/u8-uctomb.c unistr/u8-uctomb-aux.c
+endif
+
+## end   gnulib module unistr/u8-uctomb
+
+## begin gnulib module unitypes
+
+BUILT_SOURCES += $(LIBUNISTRING_UNITYPES_H)
+
+unitypes.h: unitypes.in.h
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  cat $(srcdir)/unitypes.in.h; \
+	} > $@-t && \
+	mv -f $@-t $@
+MOSTLYCLEANFILES += unitypes.h unitypes.h-t
+
+EXTRA_DIST += unitypes.in.h
+
+## end   gnulib module unitypes
+
+## begin gnulib module uniwidth/base
+
+BUILT_SOURCES += $(LIBUNISTRING_UNIWIDTH_H)
+
+uniwidth.h: uniwidth.in.h
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  cat $(srcdir)/uniwidth.in.h; \
+	} > $@-t && \
+	mv -f $@-t $@
+MOSTLYCLEANFILES += uniwidth.h uniwidth.h-t
+
+EXTRA_DIST += localcharset.h uniwidth.in.h
+
+## end   gnulib module uniwidth/base
+
+## begin gnulib module uniwidth/width
+
+if LIBUNISTRING_COMPILE_UNIWIDTH_WIDTH
+libgreputils_a_SOURCES += uniwidth/width.c
+endif
+
+EXTRA_DIST += uniwidth/cjk.h
+
+## end   gnulib module uniwidth/width
+
+## begin gnulib module unlocked-io-internal
+
+
+EXTRA_DIST += unlocked-io.h
+
+## end   gnulib module unlocked-io-internal
+
+## begin gnulib module update-copyright
+
+
+EXTRA_DIST += $(top_srcdir)/build-aux/update-copyright
+
+## end   gnulib module update-copyright
+
+## begin gnulib module useless-if-before-free
+
+
+EXTRA_DIST += $(top_srcdir)/build-aux/useless-if-before-free
+
+## end   gnulib module useless-if-before-free
+
+## begin gnulib module vc-list-files
+
+
+EXTRA_DIST += $(top_srcdir)/build-aux/vc-list-files
+
+## end   gnulib module vc-list-files
+
+## begin gnulib module verify
+
+
+EXTRA_DIST += verify.h
+
+## end   gnulib module verify
+
+## begin gnulib module version-etc
+
+libgreputils_a_SOURCES += version-etc.h version-etc.c
+
+## end   gnulib module version-etc
+
+## begin gnulib module version-etc-fsf
+
+libgreputils_a_SOURCES += version-etc-fsf.c
+
+## end   gnulib module version-etc-fsf
+
+## begin gnulib module wchar
+
+BUILT_SOURCES += wchar.h
+
+# We need the following in order to create <wchar.h> when the system
+# version does not work standalone.
+wchar.h: wchar.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''HAVE_FEATURES_H''@|$(HAVE_FEATURES_H)|g' \
+	      -e 's|@''NEXT_WCHAR_H''@|$(NEXT_WCHAR_H)|g' \
+	      -e 's|@''HAVE_WCHAR_H''@|$(HAVE_WCHAR_H)|g' \
+	      -e 's/@''HAVE_CRTDEFS_H''@/$(HAVE_CRTDEFS_H)/g' \
+	      -e 's/@''GNULIBHEADERS_OVERRIDE_WINT_T''@/$(GNULIBHEADERS_OVERRIDE_WINT_T)/g' \
+	      -e 's/@''GNULIB_BTOWC''@/$(GL_GNULIB_BTOWC)/g' \
+	      -e 's/@''GNULIB_WCTOB''@/$(GL_GNULIB_WCTOB)/g' \
+	      -e 's/@''GNULIB_MBSINIT''@/$(GL_GNULIB_MBSINIT)/g' \
+	      -e 's/@''GNULIB_MBRTOWC''@/$(GL_GNULIB_MBRTOWC)/g' \
+	      -e 's/@''GNULIB_MBRLEN''@/$(GL_GNULIB_MBRLEN)/g' \
+	      -e 's/@''GNULIB_MBSRTOWCS''@/$(GL_GNULIB_MBSRTOWCS)/g' \
+	      -e 's/@''GNULIB_MBSNRTOWCS''@/$(GL_GNULIB_MBSNRTOWCS)/g' \
+	      -e 's/@''GNULIB_WCRTOMB''@/$(GL_GNULIB_WCRTOMB)/g' \
+	      -e 's/@''GNULIB_WCSRTOMBS''@/$(GL_GNULIB_WCSRTOMBS)/g' \
+	      -e 's/@''GNULIB_WCSNRTOMBS''@/$(GL_GNULIB_WCSNRTOMBS)/g' \
+	      -e 's/@''GNULIB_WCWIDTH''@/$(GL_GNULIB_WCWIDTH)/g' \
+	      -e 's/@''GNULIB_WMEMCHR''@/$(GL_GNULIB_WMEMCHR)/g' \
+	      -e 's/@''GNULIB_WMEMCMP''@/$(GL_GNULIB_WMEMCMP)/g' \
+	      -e 's/@''GNULIB_WMEMCPY''@/$(GL_GNULIB_WMEMCPY)/g' \
+	      -e 's/@''GNULIB_WMEMMOVE''@/$(GL_GNULIB_WMEMMOVE)/g' \
+	      -e 's/@''GNULIB_WMEMPCPY''@/$(GL_GNULIB_WMEMPCPY)/g' \
+	      -e 's/@''GNULIB_WMEMSET''@/$(GL_GNULIB_WMEMSET)/g' \
+	      -e 's/@''GNULIB_WCSLEN''@/$(GL_GNULIB_WCSLEN)/g' \
+	      -e 's/@''GNULIB_WCSNLEN''@/$(GL_GNULIB_WCSNLEN)/g' \
+	      -e 's/@''GNULIB_WCSCPY''@/$(GL_GNULIB_WCSCPY)/g' \
+	      -e 's/@''GNULIB_WCPCPY''@/$(GL_GNULIB_WCPCPY)/g' \
+	      -e 's/@''GNULIB_WCSNCPY''@/$(GL_GNULIB_WCSNCPY)/g' \
+	      -e 's/@''GNULIB_WCPNCPY''@/$(GL_GNULIB_WCPNCPY)/g' \
+	      -e 's/@''GNULIB_WCSCAT''@/$(GL_GNULIB_WCSCAT)/g' \
+	      -e 's/@''GNULIB_WCSNCAT''@/$(GL_GNULIB_WCSNCAT)/g' \
+	      -e 's/@''GNULIB_WCSCMP''@/$(GL_GNULIB_WCSCMP)/g' \
+	      -e 's/@''GNULIB_WCSNCMP''@/$(GL_GNULIB_WCSNCMP)/g' \
+	      -e 's/@''GNULIB_WCSCASECMP''@/$(GL_GNULIB_WCSCASECMP)/g' \
+	      -e 's/@''GNULIB_WCSNCASECMP''@/$(GL_GNULIB_WCSNCASECMP)/g' \
+	      -e 's/@''GNULIB_WCSCOLL''@/$(GL_GNULIB_WCSCOLL)/g' \
+	      -e 's/@''GNULIB_WCSXFRM''@/$(GL_GNULIB_WCSXFRM)/g' \
+	      -e 's/@''GNULIB_WCSDUP''@/$(GL_GNULIB_WCSDUP)/g' \
+	      -e 's/@''GNULIB_WCSCHR''@/$(GL_GNULIB_WCSCHR)/g' \
+	      -e 's/@''GNULIB_WCSRCHR''@/$(GL_GNULIB_WCSRCHR)/g' \
+	      -e 's/@''GNULIB_WCSCSPN''@/$(GL_GNULIB_WCSCSPN)/g' \
+	      -e 's/@''GNULIB_WCSSPN''@/$(GL_GNULIB_WCSSPN)/g' \
+	      -e 's/@''GNULIB_WCSPBRK''@/$(GL_GNULIB_WCSPBRK)/g' \
+	      -e 's/@''GNULIB_WCSSTR''@/$(GL_GNULIB_WCSSTR)/g' \
+	      -e 's/@''GNULIB_WCSTOK''@/$(GL_GNULIB_WCSTOK)/g' \
+	      -e 's/@''GNULIB_WCSWIDTH''@/$(GL_GNULIB_WCSWIDTH)/g' \
+	      -e 's/@''GNULIB_WCSFTIME''@/$(GL_GNULIB_WCSFTIME)/g' \
+	      -e 's/@''GNULIB_MDA_WCSDUP''@/$(GL_GNULIB_MDA_WCSDUP)/g' \
+	      < $(srcdir)/wchar.in.h | \
+	  sed -e 's|@''HAVE_WINT_T''@|$(HAVE_WINT_T)|g' \
+	      -e 's|@''HAVE_BTOWC''@|$(HAVE_BTOWC)|g' \
+	      -e 's|@''HAVE_MBSINIT''@|$(HAVE_MBSINIT)|g' \
+	      -e 's|@''HAVE_MBRTOWC''@|$(HAVE_MBRTOWC)|g' \
+	      -e 's|@''HAVE_MBRLEN''@|$(HAVE_MBRLEN)|g' \
+	      -e 's|@''HAVE_MBSRTOWCS''@|$(HAVE_MBSRTOWCS)|g' \
+	      -e 's|@''HAVE_MBSNRTOWCS''@|$(HAVE_MBSNRTOWCS)|g' \
+	      -e 's|@''HAVE_WCRTOMB''@|$(HAVE_WCRTOMB)|g' \
+	      -e 's|@''HAVE_WCSRTOMBS''@|$(HAVE_WCSRTOMBS)|g' \
+	      -e 's|@''HAVE_WCSNRTOMBS''@|$(HAVE_WCSNRTOMBS)|g' \
+	      -e 's|@''HAVE_WMEMCHR''@|$(HAVE_WMEMCHR)|g' \
+	      -e 's|@''HAVE_WMEMCMP''@|$(HAVE_WMEMCMP)|g' \
+	      -e 's|@''HAVE_WMEMCPY''@|$(HAVE_WMEMCPY)|g' \
+	      -e 's|@''HAVE_WMEMMOVE''@|$(HAVE_WMEMMOVE)|g' \
+	      -e 's|@''HAVE_WMEMPCPY''@|$(HAVE_WMEMPCPY)|g' \
+	      -e 's|@''HAVE_WMEMSET''@|$(HAVE_WMEMSET)|g' \
+	      -e 's|@''HAVE_WCSLEN''@|$(HAVE_WCSLEN)|g' \
+	      -e 's|@''HAVE_WCSNLEN''@|$(HAVE_WCSNLEN)|g' \
+	      -e 's|@''HAVE_WCSCPY''@|$(HAVE_WCSCPY)|g' \
+	      -e 's|@''HAVE_WCPCPY''@|$(HAVE_WCPCPY)|g' \
+	      -e 's|@''HAVE_WCSNCPY''@|$(HAVE_WCSNCPY)|g' \
+	      -e 's|@''HAVE_WCPNCPY''@|$(HAVE_WCPNCPY)|g' \
+	      -e 's|@''HAVE_WCSCAT''@|$(HAVE_WCSCAT)|g' \
+	      -e 's|@''HAVE_WCSNCAT''@|$(HAVE_WCSNCAT)|g' \
+	      -e 's|@''HAVE_WCSCMP''@|$(HAVE_WCSCMP)|g' \
+	      -e 's|@''HAVE_WCSNCMP''@|$(HAVE_WCSNCMP)|g' \
+	      -e 's|@''HAVE_WCSCASECMP''@|$(HAVE_WCSCASECMP)|g' \
+	      -e 's|@''HAVE_WCSNCASECMP''@|$(HAVE_WCSNCASECMP)|g' \
+	      -e 's|@''HAVE_WCSCOLL''@|$(HAVE_WCSCOLL)|g' \
+	      -e 's|@''HAVE_WCSXFRM''@|$(HAVE_WCSXFRM)|g' \
+	      -e 's|@''HAVE_WCSDUP''@|$(HAVE_WCSDUP)|g' \
+	      -e 's|@''HAVE_WCSCHR''@|$(HAVE_WCSCHR)|g' \
+	      -e 's|@''HAVE_WCSRCHR''@|$(HAVE_WCSRCHR)|g' \
+	      -e 's|@''HAVE_WCSCSPN''@|$(HAVE_WCSCSPN)|g' \
+	      -e 's|@''HAVE_WCSSPN''@|$(HAVE_WCSSPN)|g' \
+	      -e 's|@''HAVE_WCSPBRK''@|$(HAVE_WCSPBRK)|g' \
+	      -e 's|@''HAVE_WCSSTR''@|$(HAVE_WCSSTR)|g' \
+	      -e 's|@''HAVE_WCSTOK''@|$(HAVE_WCSTOK)|g' \
+	      -e 's|@''HAVE_WCSWIDTH''@|$(HAVE_WCSWIDTH)|g' \
+	      -e 's|@''HAVE_WCSFTIME''@|$(HAVE_WCSFTIME)|g' \
+	      -e 's|@''HAVE_DECL_WCTOB''@|$(HAVE_DECL_WCTOB)|g' \
+	      -e 's|@''HAVE_DECL_WCSDUP''@|$(HAVE_DECL_WCSDUP)|g' \
+	      -e 's|@''HAVE_DECL_WCWIDTH''@|$(HAVE_DECL_WCWIDTH)|g' \
+	  | \
+	  sed -e 's|@''REPLACE_MBSTATE_T''@|$(REPLACE_MBSTATE_T)|g' \
+	      -e 's|@''REPLACE_BTOWC''@|$(REPLACE_BTOWC)|g' \
+	      -e 's|@''REPLACE_WCTOB''@|$(REPLACE_WCTOB)|g' \
+	      -e 's|@''REPLACE_MBSINIT''@|$(REPLACE_MBSINIT)|g' \
+	      -e 's|@''REPLACE_MBRTOWC''@|$(REPLACE_MBRTOWC)|g' \
+	      -e 's|@''REPLACE_MBRLEN''@|$(REPLACE_MBRLEN)|g' \
+	      -e 's|@''REPLACE_MBSRTOWCS''@|$(REPLACE_MBSRTOWCS)|g' \
+	      -e 's|@''REPLACE_MBSNRTOWCS''@|$(REPLACE_MBSNRTOWCS)|g' \
+	      -e 's|@''REPLACE_WCRTOMB''@|$(REPLACE_WCRTOMB)|g' \
+	      -e 's|@''REPLACE_WCSRTOMBS''@|$(REPLACE_WCSRTOMBS)|g' \
+	      -e 's|@''REPLACE_WCSNRTOMBS''@|$(REPLACE_WCSNRTOMBS)|g' \
+	      -e 's|@''REPLACE_WCWIDTH''@|$(REPLACE_WCWIDTH)|g' \
+	      -e 's|@''REPLACE_WCSWIDTH''@|$(REPLACE_WCSWIDTH)|g' \
+	      -e 's|@''REPLACE_WCSFTIME''@|$(REPLACE_WCSFTIME)|g' \
+	      -e 's|@''REPLACE_WCSTOK''@|$(REPLACE_WCSTOK)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)'; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += wchar.h wchar.h-t
+
+EXTRA_DIST += wchar.in.h
+
+## end   gnulib module wchar
+
+## begin gnulib module wcrtomb
+
+
+EXTRA_DIST += wcrtomb.c
+
+EXTRA_libgreputils_a_SOURCES += wcrtomb.c
+
+## end   gnulib module wcrtomb
+
+## begin gnulib module wctob
+
+
+EXTRA_DIST += wctob.c
+
+EXTRA_libgreputils_a_SOURCES += wctob.c
+
+## end   gnulib module wctob
+
+## begin gnulib module wctomb
+
+
+EXTRA_DIST += wctomb-impl.h wctomb.c
+
+EXTRA_libgreputils_a_SOURCES += wctomb.c
+
+## end   gnulib module wctomb
+
+## begin gnulib module wctype-h
+
+BUILT_SOURCES += wctype.h
+libgreputils_a_SOURCES += wctype-h.c
+
+# We need the following in order to create <wctype.h> when the system
+# doesn't have one that works with the given compiler.
+wctype.h: wctype.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's/@''HAVE_WCTYPE_H''@/$(HAVE_WCTYPE_H)/g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_WCTYPE_H''@|$(NEXT_WCTYPE_H)|g' \
+	      -e 's/@''HAVE_CRTDEFS_H''@/$(HAVE_CRTDEFS_H)/g' \
+	      -e 's/@''GNULIBHEADERS_OVERRIDE_WINT_T''@/$(GNULIBHEADERS_OVERRIDE_WINT_T)/g' \
+	      -e 's/@''GNULIB_ISWBLANK''@/$(GL_GNULIB_ISWBLANK)/g' \
+	      -e 's/@''GNULIB_ISWDIGIT''@/$(GL_GNULIB_ISWDIGIT)/g' \
+	      -e 's/@''GNULIB_ISWXDIGIT''@/$(GL_GNULIB_ISWXDIGIT)/g' \
+	      -e 's/@''GNULIB_WCTYPE''@/$(GL_GNULIB_WCTYPE)/g' \
+	      -e 's/@''GNULIB_ISWCTYPE''@/$(GL_GNULIB_ISWCTYPE)/g' \
+	      -e 's/@''GNULIB_WCTRANS''@/$(GL_GNULIB_WCTRANS)/g' \
+	      -e 's/@''GNULIB_TOWCTRANS''@/$(GL_GNULIB_TOWCTRANS)/g' \
+	      -e 's/@''HAVE_ISWBLANK''@/$(HAVE_ISWBLANK)/g' \
+	      -e 's/@''HAVE_ISWCNTRL''@/$(HAVE_ISWCNTRL)/g' \
+	      -e 's/@''HAVE_WCTYPE_T''@/$(HAVE_WCTYPE_T)/g' \
+	      -e 's/@''HAVE_WCTRANS_T''@/$(HAVE_WCTRANS_T)/g' \
+	      -e 's/@''HAVE_WINT_T''@/$(HAVE_WINT_T)/g' \
+	      -e 's/@''REPLACE_ISWBLANK''@/$(REPLACE_ISWBLANK)/g' \
+	      -e 's/@''REPLACE_ISWDIGIT''@/$(REPLACE_ISWDIGIT)/g' \
+	      -e 's/@''REPLACE_ISWXDIGIT''@/$(REPLACE_ISWXDIGIT)/g' \
+	      -e 's/@''REPLACE_ISWCNTRL''@/$(REPLACE_ISWCNTRL)/g' \
+	      -e 's/@''REPLACE_TOWLOWER''@/$(REPLACE_TOWLOWER)/g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/wctype.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += wctype.h wctype.h-t
+
+EXTRA_DIST += wctype.in.h
+
+## end   gnulib module wctype-h
+
+## begin gnulib module wcwidth
+
+
+EXTRA_DIST += wcwidth.c
+
+EXTRA_libgreputils_a_SOURCES += wcwidth.c
+
+## end   gnulib module wcwidth
+
+## begin gnulib module windows-mutex
+
+
+EXTRA_DIST += windows-initguard.h windows-mutex.c windows-mutex.h
+
+EXTRA_libgreputils_a_SOURCES += windows-mutex.c
+
+## end   gnulib module windows-mutex
+
+## begin gnulib module windows-once
+
+
+EXTRA_DIST += windows-once.c windows-once.h
+
+EXTRA_libgreputils_a_SOURCES += windows-once.c
+
+## end   gnulib module windows-once
+
+## begin gnulib module windows-recmutex
+
+
+EXTRA_DIST += windows-initguard.h windows-recmutex.c windows-recmutex.h
+
+EXTRA_libgreputils_a_SOURCES += windows-recmutex.c
+
+## end   gnulib module windows-recmutex
+
+## begin gnulib module windows-rwlock
+
+
+EXTRA_DIST += windows-initguard.h windows-rwlock.c windows-rwlock.h
+
+EXTRA_libgreputils_a_SOURCES += windows-rwlock.c
+
+## end   gnulib module windows-rwlock
+
+## begin gnulib module wmemchr
+
+
+EXTRA_DIST += wmemchr-impl.h wmemchr.c
+
+EXTRA_libgreputils_a_SOURCES += wmemchr.c
+
+## end   gnulib module wmemchr
+
+## begin gnulib module wmempcpy
+
+
+EXTRA_DIST += wmempcpy.c
+
+EXTRA_libgreputils_a_SOURCES += wmempcpy.c
+
+## end   gnulib module wmempcpy
+
+## begin gnulib module xalloc
+
+libgreputils_a_SOURCES += xmalloc.c
+
+EXTRA_DIST += xalloc.h
+
+## end   gnulib module xalloc
+
+## begin gnulib module xalloc-die
+
+libgreputils_a_SOURCES += xalloc-die.c
+
+EXTRA_DIST += xalloc.h
+
+## end   gnulib module xalloc-die
+
+## begin gnulib module xalloc-oversized
+
+
+EXTRA_DIST += xalloc-oversized.h
+
+## end   gnulib module xalloc-oversized
+
+## begin gnulib module xbinary-io
+
+libgreputils_a_SOURCES += xbinary-io.h xbinary-io.c
+
+## end   gnulib module xbinary-io
+
+## begin gnulib module xstriconv
+
+libgreputils_a_SOURCES += xstriconv.h xstriconv.c
+
+## end   gnulib module xstriconv
+
+## begin gnulib module xstrtoimax
+
+libgreputils_a_SOURCES += xstrtoimax.c
+
+## end   gnulib module xstrtoimax
+
+## begin gnulib module xstrtol
+
+libgreputils_a_SOURCES += xstrtol.c xstrtoul.c
+
+EXTRA_DIST += xstrtol.h
+
+## end   gnulib module xstrtol
+
+
+mostlyclean-local: mostlyclean-generic
+	@for dir in '' $(MOSTLYCLEANDIRS); do \
+	  if test -n "$$dir" && test -d $$dir; then \
+	    echo "rmdir $$dir"; rmdir $$dir; \
+	  fi; \
+	done; \
+	:
diff --git a/src/grep/lib/hard-locale.c b/src/grep/lib/hard-locale.c
new file mode 100644
index 0000000..8b6802d
--- /dev/null
+++ b/src/grep/lib/hard-locale.c
@@ -0,0 +1,35 @@
+/* hard-locale.c -- Determine whether a locale is hard.
+
+   Copyright (C) 1997-1999, 2002-2004, 2006-2007, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "hard-locale.h"
+
+#include <locale.h>
+#include <string.h>
+
+bool
+hard_locale (int category)
+{
+  char locale[SETLOCALE_NULL_MAX];
+
+  if (setlocale_null_r (category, locale, sizeof (locale)))
+    return false;
+
+  return !(strcmp (locale, "C") == 0 || strcmp (locale, "POSIX") == 0);
+}
diff --git a/src/grep/lib/hard-locale.h b/src/grep/lib/hard-locale.h
new file mode 100644
index 0000000..eba6601
--- /dev/null
+++ b/src/grep/lib/hard-locale.h
@@ -0,0 +1,28 @@
+/* Determine whether a locale is hard.
+
+   Copyright (C) 1999, 2003-2004, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef HARD_LOCALE_H_
+# define HARD_LOCALE_H_ 1
+
+# include <stdbool.h>
+
+/* Return true if the specified CATEGORY of the current locale is hard, i.e.
+   different from the C or POSIX locale that has a fixed behavior.
+   CATEGORY must be one of the LC_* values, but not LC_ALL.  */
+extern bool hard_locale (int category);
+
+#endif /* HARD_LOCALE_H_ */
diff --git a/src/grep/lib/hash.c b/src/grep/lib/hash.c
new file mode 100644
index 0000000..5f5f8fc
--- /dev/null
+++ b/src/grep/lib/hash.c
@@ -0,0 +1,1106 @@
+/* hash - hashing table processing.
+
+   Copyright (C) 1998-2004, 2006-2007, 2009-2021 Free Software Foundation, Inc.
+
+   Written by Jim Meyering, 1992.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* A generic hash table package.  */
+
+/* Define USE_OBSTACK to 1 if you want the allocator to use obstacks instead
+   of malloc.  If you change USE_OBSTACK, you have to recompile!  */
+
+#include <config.h>
+
+#include "hash.h"
+
+#include "bitrotate.h"
+#include "xalloc-oversized.h"
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#if USE_OBSTACK
+# include "obstack.h"
+# ifndef obstack_chunk_alloc
+#  define obstack_chunk_alloc malloc
+# endif
+# ifndef obstack_chunk_free
+#  define obstack_chunk_free free
+# endif
+#endif
+
+struct hash_entry
+  {
+    void *data;
+    struct hash_entry *next;
+  };
+
+struct hash_table
+  {
+    /* The array of buckets starts at BUCKET and extends to BUCKET_LIMIT-1,
+       for a possibility of N_BUCKETS.  Among those, N_BUCKETS_USED buckets
+       are not empty, there are N_ENTRIES active entries in the table.  */
+    struct hash_entry *bucket;
+    struct hash_entry const *bucket_limit;
+    size_t n_buckets;
+    size_t n_buckets_used;
+    size_t n_entries;
+
+    /* Tuning arguments, kept in a physically separate structure.  */
+    const Hash_tuning *tuning;
+
+    /* Three functions are given to 'hash_initialize', see the documentation
+       block for this function.  In a word, HASHER randomizes a user entry
+       into a number up from 0 up to some maximum minus 1; COMPARATOR returns
+       true if two user entries compare equally; and DATA_FREER is the cleanup
+       function for a user entry.  */
+    Hash_hasher hasher;
+    Hash_comparator comparator;
+    Hash_data_freer data_freer;
+
+    /* A linked list of freed struct hash_entry structs.  */
+    struct hash_entry *free_entry_list;
+
+#if USE_OBSTACK
+    /* Whenever obstacks are used, it is possible to allocate all overflowed
+       entries into a single stack, so they all can be freed in a single
+       operation.  It is not clear if the speedup is worth the trouble.  */
+    struct obstack entry_stack;
+#endif
+  };
+
+/* A hash table contains many internal entries, each holding a pointer to
+   some user-provided data (also called a user entry).  An entry indistinctly
+   refers to both the internal entry and its associated user entry.  A user
+   entry contents may be hashed by a randomization function (the hashing
+   function, or just "hasher" for short) into a number (or "slot") between 0
+   and the current table size.  At each slot position in the hash table,
+   starts a linked chain of entries for which the user data all hash to this
+   slot.  A bucket is the collection of all entries hashing to the same slot.
+
+   A good "hasher" function will distribute entries rather evenly in buckets.
+   In the ideal case, the length of each bucket is roughly the number of
+   entries divided by the table size.  Finding the slot for a data is usually
+   done in constant time by the "hasher", and the later finding of a precise
+   entry is linear in time with the size of the bucket.  Consequently, a
+   larger hash table size (that is, a larger number of buckets) is prone to
+   yielding shorter chains, *given* the "hasher" function behaves properly.
+
+   Long buckets slow down the lookup algorithm.  One might use big hash table
+   sizes in hope to reduce the average length of buckets, but this might
+   become inordinate, as unused slots in the hash table take some space.  The
+   best bet is to make sure you are using a good "hasher" function (beware
+   that those are not that easy to write! :-), and to use a table size
+   larger than the actual number of entries.  */
+
+/* If an insertion makes the ratio of nonempty buckets to table size larger
+   than the growth threshold (a number between 0.0 and 1.0), then increase
+   the table size by multiplying by the growth factor (a number greater than
+   1.0).  The growth threshold defaults to 0.8, and the growth factor
+   defaults to 1.414, meaning that the table will have doubled its size
+   every second time 80% of the buckets get used.  */
+#define DEFAULT_GROWTH_THRESHOLD 0.8f
+#define DEFAULT_GROWTH_FACTOR 1.414f
+
+/* If a deletion empties a bucket and causes the ratio of used buckets to
+   table size to become smaller than the shrink threshold (a number between
+   0.0 and 1.0), then shrink the table by multiplying by the shrink factor (a
+   number greater than the shrink threshold but smaller than 1.0).  The shrink
+   threshold and factor default to 0.0 and 1.0, meaning that the table never
+   shrinks.  */
+#define DEFAULT_SHRINK_THRESHOLD 0.0f
+#define DEFAULT_SHRINK_FACTOR 1.0f
+
+/* Use this to initialize or reset a TUNING structure to
+   some sensible values. */
+static const Hash_tuning default_tuning =
+  {
+    DEFAULT_SHRINK_THRESHOLD,
+    DEFAULT_SHRINK_FACTOR,
+    DEFAULT_GROWTH_THRESHOLD,
+    DEFAULT_GROWTH_FACTOR,
+    false
+  };
+
+/* Information and lookup.  */
+
+size_t
+hash_get_n_buckets (const Hash_table *table)
+{
+  return table->n_buckets;
+}
+
+size_t
+hash_get_n_buckets_used (const Hash_table *table)
+{
+  return table->n_buckets_used;
+}
+
+size_t
+hash_get_n_entries (const Hash_table *table)
+{
+  return table->n_entries;
+}
+
+size_t
+hash_get_max_bucket_length (const Hash_table *table)
+{
+  struct hash_entry const *bucket;
+  size_t max_bucket_length = 0;
+
+  for (bucket = table->bucket; bucket < table->bucket_limit; bucket++)
+    {
+      if (bucket->data)
+        {
+          struct hash_entry const *cursor = bucket;
+          size_t bucket_length = 1;
+
+          while (cursor = cursor->next, cursor)
+            bucket_length++;
+
+          if (bucket_length > max_bucket_length)
+            max_bucket_length = bucket_length;
+        }
+    }
+
+  return max_bucket_length;
+}
+
+bool
+hash_table_ok (const Hash_table *table)
+{
+  struct hash_entry const *bucket;
+  size_t n_buckets_used = 0;
+  size_t n_entries = 0;
+
+  for (bucket = table->bucket; bucket < table->bucket_limit; bucket++)
+    {
+      if (bucket->data)
+        {
+          struct hash_entry const *cursor = bucket;
+
+          /* Count bucket head.  */
+          n_buckets_used++;
+          n_entries++;
+
+          /* Count bucket overflow.  */
+          while (cursor = cursor->next, cursor)
+            n_entries++;
+        }
+    }
+
+  if (n_buckets_used == table->n_buckets_used && n_entries == table->n_entries)
+    return true;
+
+  return false;
+}
+
+void
+hash_print_statistics (const Hash_table *table, FILE *stream)
+{
+  size_t n_entries = hash_get_n_entries (table);
+  size_t n_buckets = hash_get_n_buckets (table);
+  size_t n_buckets_used = hash_get_n_buckets_used (table);
+  size_t max_bucket_length = hash_get_max_bucket_length (table);
+
+  fprintf (stream, "# entries:         %lu\n", (unsigned long int) n_entries);
+  fprintf (stream, "# buckets:         %lu\n", (unsigned long int) n_buckets);
+  fprintf (stream, "# buckets used:    %lu (%.2f%%)\n",
+           (unsigned long int) n_buckets_used,
+           (100.0 * n_buckets_used) / n_buckets);
+  fprintf (stream, "max bucket length: %lu\n",
+           (unsigned long int) max_bucket_length);
+}
+
+/* Hash KEY and return a pointer to the selected bucket.
+   If TABLE->hasher misbehaves, abort.  */
+static struct hash_entry *
+safe_hasher (const Hash_table *table, const void *key)
+{
+  size_t n = table->hasher (key, table->n_buckets);
+  if (! (n < table->n_buckets))
+    abort ();
+  return table->bucket + n;
+}
+
+void *
+hash_lookup (const Hash_table *table, const void *entry)
+{
+  struct hash_entry const *bucket = safe_hasher (table, entry);
+  struct hash_entry const *cursor;
+
+  if (bucket->data == NULL)
+    return NULL;
+
+  for (cursor = bucket; cursor; cursor = cursor->next)
+    if (entry == cursor->data || table->comparator (entry, cursor->data))
+      return cursor->data;
+
+  return NULL;
+}
+
+/* Walking.  */
+
+void *
+hash_get_first (const Hash_table *table)
+{
+  struct hash_entry const *bucket;
+
+  if (table->n_entries == 0)
+    return NULL;
+
+  for (bucket = table->bucket; ; bucket++)
+    if (! (bucket < table->bucket_limit))
+      abort ();
+    else if (bucket->data)
+      return bucket->data;
+}
+
+void *
+hash_get_next (const Hash_table *table, const void *entry)
+{
+  struct hash_entry const *bucket = safe_hasher (table, entry);
+  struct hash_entry const *cursor;
+
+  /* Find next entry in the same bucket.  */
+  cursor = bucket;
+  do
+    {
+      if (cursor->data == entry && cursor->next)
+        return cursor->next->data;
+      cursor = cursor->next;
+    }
+  while (cursor != NULL);
+
+  /* Find first entry in any subsequent bucket.  */
+  while (++bucket < table->bucket_limit)
+    if (bucket->data)
+      return bucket->data;
+
+  /* None found.  */
+  return NULL;
+}
+
+size_t
+hash_get_entries (const Hash_table *table, void **buffer,
+                  size_t buffer_size)
+{
+  size_t counter = 0;
+  struct hash_entry const *bucket;
+  struct hash_entry const *cursor;
+
+  for (bucket = table->bucket; bucket < table->bucket_limit; bucket++)
+    {
+      if (bucket->data)
+        {
+          for (cursor = bucket; cursor; cursor = cursor->next)
+            {
+              if (counter >= buffer_size)
+                return counter;
+              buffer[counter++] = cursor->data;
+            }
+        }
+    }
+
+  return counter;
+}
+
+size_t
+hash_do_for_each (const Hash_table *table, Hash_processor processor,
+                  void *processor_data)
+{
+  size_t counter = 0;
+  struct hash_entry const *bucket;
+  struct hash_entry const *cursor;
+
+  for (bucket = table->bucket; bucket < table->bucket_limit; bucket++)
+    {
+      if (bucket->data)
+        {
+          for (cursor = bucket; cursor; cursor = cursor->next)
+            {
+              if (! processor (cursor->data, processor_data))
+                return counter;
+              counter++;
+            }
+        }
+    }
+
+  return counter;
+}
+
+/* Allocation and clean-up.  */
+
+#if USE_DIFF_HASH
+
+/* About hashings, Paul Eggert writes to me (FP), on 1994-01-01: "Please see
+   B. J. McKenzie, R. Harries & T. Bell, Selecting a hashing algorithm,
+   Software--practice & experience 20, 2 (Feb 1990), 209-224.  Good hash
+   algorithms tend to be domain-specific, so what's good for [diffutils'] io.c
+   may not be good for your application."  */
+
+size_t
+hash_string (const char *string, size_t n_buckets)
+{
+# define HASH_ONE_CHAR(Value, Byte) \
+  ((Byte) + rotl_sz (Value, 7))
+
+  size_t value = 0;
+  unsigned char ch;
+
+  for (; (ch = *string); string++)
+    value = HASH_ONE_CHAR (value, ch);
+  return value % n_buckets;
+
+# undef HASH_ONE_CHAR
+}
+
+#else /* not USE_DIFF_HASH */
+
+/* This one comes from 'recode', and performs a bit better than the above as
+   per a few experiments.  It is inspired from a hashing routine found in the
+   very old Cyber 'snoop', itself written in typical Greg Mansfield style.
+   (By the way, what happened to this excellent man?  Is he still alive?)  */
+
+size_t
+hash_string (const char *string, size_t n_buckets)
+{
+  size_t value = 0;
+  unsigned char ch;
+
+  for (; (ch = *string); string++)
+    value = (value * 31 + ch) % n_buckets;
+  return value;
+}
+
+#endif /* not USE_DIFF_HASH */
+
+/* Return true if CANDIDATE is a prime number.  CANDIDATE should be an odd
+   number at least equal to 11.  */
+
+static bool _GL_ATTRIBUTE_CONST
+is_prime (size_t candidate)
+{
+  size_t divisor = 3;
+  size_t square = divisor * divisor;
+
+  while (square < candidate && (candidate % divisor))
+    {
+      divisor++;
+      square += 4 * divisor;
+      divisor++;
+    }
+
+  return (candidate % divisor ? true : false);
+}
+
+/* Round a given CANDIDATE number up to the nearest prime, and return that
+   prime.  Primes lower than 10 are merely skipped.  */
+
+static size_t _GL_ATTRIBUTE_CONST
+next_prime (size_t candidate)
+{
+  /* Skip small primes.  */
+  if (candidate < 10)
+    candidate = 10;
+
+  /* Make it definitely odd.  */
+  candidate |= 1;
+
+  while (SIZE_MAX != candidate && !is_prime (candidate))
+    candidate += 2;
+
+  return candidate;
+}
+
+void
+hash_reset_tuning (Hash_tuning *tuning)
+{
+  *tuning = default_tuning;
+}
+
+/* If the user passes a NULL hasher, we hash the raw pointer.  */
+static size_t
+raw_hasher (const void *data, size_t n)
+{
+  /* When hashing unique pointers, it is often the case that they were
+     generated by malloc and thus have the property that the low-order
+     bits are 0.  As this tends to give poorer performance with small
+     tables, we rotate the pointer value before performing division,
+     in an attempt to improve hash quality.  */
+  size_t val = rotr_sz ((size_t) data, 3);
+  return val % n;
+}
+
+/* If the user passes a NULL comparator, we use pointer comparison.  */
+static bool
+raw_comparator (const void *a, const void *b)
+{
+  return a == b;
+}
+
+
+/* For the given hash TABLE, check the user supplied tuning structure for
+   reasonable values, and return true if there is no gross error with it.
+   Otherwise, definitively reset the TUNING field to some acceptable default
+   in the hash table (that is, the user loses the right of further modifying
+   tuning arguments), and return false.  */
+
+static bool
+check_tuning (Hash_table *table)
+{
+  const Hash_tuning *tuning = table->tuning;
+  float epsilon;
+  if (tuning == &default_tuning)
+    return true;
+
+  /* Be a bit stricter than mathematics would require, so that
+     rounding errors in size calculations do not cause allocations to
+     fail to grow or shrink as they should.  The smallest allocation
+     is 11 (due to next_prime's algorithm), so an epsilon of 0.1
+     should be good enough.  */
+  epsilon = 0.1f;
+
+  if (epsilon < tuning->growth_threshold
+      && tuning->growth_threshold < 1 - epsilon
+      && 1 + epsilon < tuning->growth_factor
+      && 0 <= tuning->shrink_threshold
+      && tuning->shrink_threshold + epsilon < tuning->shrink_factor
+      && tuning->shrink_factor <= 1
+      && tuning->shrink_threshold + epsilon < tuning->growth_threshold)
+    return true;
+
+  table->tuning = &default_tuning;
+  return false;
+}
+
+/* Compute the size of the bucket array for the given CANDIDATE and
+   TUNING, or return 0 if there is no possible way to allocate that
+   many entries.  */
+
+static size_t _GL_ATTRIBUTE_PURE
+compute_bucket_size (size_t candidate, const Hash_tuning *tuning)
+{
+  if (!tuning->is_n_buckets)
+    {
+      float new_candidate = candidate / tuning->growth_threshold;
+      if ((float) SIZE_MAX <= new_candidate)
+        return 0;
+      candidate = new_candidate;
+    }
+  candidate = next_prime (candidate);
+  if (xalloc_oversized (candidate, sizeof (struct hash_entry *)))
+    return 0;
+  return candidate;
+}
+
+Hash_table *
+hash_initialize (size_t candidate, const Hash_tuning *tuning,
+                 Hash_hasher hasher, Hash_comparator comparator,
+                 Hash_data_freer data_freer)
+{
+  Hash_table *table;
+
+  if (hasher == NULL)
+    hasher = raw_hasher;
+  if (comparator == NULL)
+    comparator = raw_comparator;
+
+  table = malloc (sizeof *table);
+  if (table == NULL)
+    return NULL;
+
+  if (!tuning)
+    tuning = &default_tuning;
+  table->tuning = tuning;
+  if (!check_tuning (table))
+    {
+      /* Fail if the tuning options are invalid.  This is the only occasion
+         when the user gets some feedback about it.  Once the table is created,
+         if the user provides invalid tuning options, we silently revert to
+         using the defaults, and ignore further request to change the tuning
+         options.  */
+      goto fail;
+    }
+
+  table->n_buckets = compute_bucket_size (candidate, tuning);
+  if (!table->n_buckets)
+    goto fail;
+
+  table->bucket = calloc (table->n_buckets, sizeof *table->bucket);
+  if (table->bucket == NULL)
+    goto fail;
+  table->bucket_limit = table->bucket + table->n_buckets;
+  table->n_buckets_used = 0;
+  table->n_entries = 0;
+
+  table->hasher = hasher;
+  table->comparator = comparator;
+  table->data_freer = data_freer;
+
+  table->free_entry_list = NULL;
+#if USE_OBSTACK
+  obstack_init (&table->entry_stack);
+#endif
+  return table;
+
+ fail:
+  free (table);
+  return NULL;
+}
+
+void
+hash_clear (Hash_table *table)
+{
+  struct hash_entry *bucket;
+
+  for (bucket = table->bucket; bucket < table->bucket_limit; bucket++)
+    {
+      if (bucket->data)
+        {
+          struct hash_entry *cursor;
+          struct hash_entry *next;
+
+          /* Free the bucket overflow.  */
+          for (cursor = bucket->next; cursor; cursor = next)
+            {
+              if (table->data_freer)
+                table->data_freer (cursor->data);
+              cursor->data = NULL;
+
+              next = cursor->next;
+              /* Relinking is done one entry at a time, as it is to be expected
+                 that overflows are either rare or short.  */
+              cursor->next = table->free_entry_list;
+              table->free_entry_list = cursor;
+            }
+
+          /* Free the bucket head.  */
+          if (table->data_freer)
+            table->data_freer (bucket->data);
+          bucket->data = NULL;
+          bucket->next = NULL;
+        }
+    }
+
+  table->n_buckets_used = 0;
+  table->n_entries = 0;
+}
+
+void
+hash_free (Hash_table *table)
+{
+  struct hash_entry *bucket;
+  struct hash_entry *cursor;
+  struct hash_entry *next;
+
+  /* Call the user data_freer function.  */
+  if (table->data_freer && table->n_entries)
+    {
+      for (bucket = table->bucket; bucket < table->bucket_limit; bucket++)
+        {
+          if (bucket->data)
+            {
+              for (cursor = bucket; cursor; cursor = cursor->next)
+                table->data_freer (cursor->data);
+            }
+        }
+    }
+
+#if USE_OBSTACK
+
+  obstack_free (&table->entry_stack, NULL);
+
+#else
+
+  /* Free all bucket overflowed entries.  */
+  for (bucket = table->bucket; bucket < table->bucket_limit; bucket++)
+    {
+      for (cursor = bucket->next; cursor; cursor = next)
+        {
+          next = cursor->next;
+          free (cursor);
+        }
+    }
+
+  /* Also reclaim the internal list of previously freed entries.  */
+  for (cursor = table->free_entry_list; cursor; cursor = next)
+    {
+      next = cursor->next;
+      free (cursor);
+    }
+
+#endif
+
+  /* Free the remainder of the hash table structure.  */
+  free (table->bucket);
+  free (table);
+}
+
+/* Insertion and deletion.  */
+
+/* Get a new hash entry for a bucket overflow, possibly by recycling a
+   previously freed one.  If this is not possible, allocate a new one.  */
+
+static struct hash_entry *
+allocate_entry (Hash_table *table)
+{
+  struct hash_entry *new;
+
+  if (table->free_entry_list)
+    {
+      new = table->free_entry_list;
+      table->free_entry_list = new->next;
+    }
+  else
+    {
+#if USE_OBSTACK
+      new = obstack_alloc (&table->entry_stack, sizeof *new);
+#else
+      new = malloc (sizeof *new);
+#endif
+    }
+
+  return new;
+}
+
+/* Free a hash entry which was part of some bucket overflow,
+   saving it for later recycling.  */
+
+static void
+free_entry (Hash_table *table, struct hash_entry *entry)
+{
+  entry->data = NULL;
+  entry->next = table->free_entry_list;
+  table->free_entry_list = entry;
+}
+
+/* This private function is used to help with insertion and deletion.  When
+   ENTRY matches an entry in the table, return a pointer to the corresponding
+   user data and set *BUCKET_HEAD to the head of the selected bucket.
+   Otherwise, return NULL.  When DELETE is true and ENTRY matches an entry in
+   the table, unlink the matching entry.  */
+
+static void *
+hash_find_entry (Hash_table *table, const void *entry,
+                 struct hash_entry **bucket_head, bool delete)
+{
+  struct hash_entry *bucket = safe_hasher (table, entry);
+  struct hash_entry *cursor;
+
+  *bucket_head = bucket;
+
+  /* Test for empty bucket.  */
+  if (bucket->data == NULL)
+    return NULL;
+
+  /* See if the entry is the first in the bucket.  */
+  if (entry == bucket->data || table->comparator (entry, bucket->data))
+    {
+      void *data = bucket->data;
+
+      if (delete)
+        {
+          if (bucket->next)
+            {
+              struct hash_entry *next = bucket->next;
+
+              /* Bump the first overflow entry into the bucket head, then save
+                 the previous first overflow entry for later recycling.  */
+              *bucket = *next;
+              free_entry (table, next);
+            }
+          else
+            {
+              bucket->data = NULL;
+            }
+        }
+
+      return data;
+    }
+
+  /* Scan the bucket overflow.  */
+  for (cursor = bucket; cursor->next; cursor = cursor->next)
+    {
+      if (entry == cursor->next->data
+          || table->comparator (entry, cursor->next->data))
+        {
+          void *data = cursor->next->data;
+
+          if (delete)
+            {
+              struct hash_entry *next = cursor->next;
+
+              /* Unlink the entry to delete, then save the freed entry for later
+                 recycling.  */
+              cursor->next = next->next;
+              free_entry (table, next);
+            }
+
+          return data;
+        }
+    }
+
+  /* No entry found.  */
+  return NULL;
+}
+
+/* Internal helper, to move entries from SRC to DST.  Both tables must
+   share the same free entry list.  If SAFE, only move overflow
+   entries, saving bucket heads for later, so that no allocations will
+   occur.  Return false if the free entry list is exhausted and an
+   allocation fails.  */
+
+static bool
+transfer_entries (Hash_table *dst, Hash_table *src, bool safe)
+{
+  struct hash_entry *bucket;
+  struct hash_entry *cursor;
+  struct hash_entry *next;
+  for (bucket = src->bucket; bucket < src->bucket_limit; bucket++)
+    if (bucket->data)
+      {
+        void *data;
+        struct hash_entry *new_bucket;
+
+        /* Within each bucket, transfer overflow entries first and
+           then the bucket head, to minimize memory pressure.  After
+           all, the only time we might allocate is when moving the
+           bucket head, but moving overflow entries first may create
+           free entries that can be recycled by the time we finally
+           get to the bucket head.  */
+        for (cursor = bucket->next; cursor; cursor = next)
+          {
+            data = cursor->data;
+            new_bucket = safe_hasher (dst, data);
+
+            next = cursor->next;
+
+            if (new_bucket->data)
+              {
+                /* Merely relink an existing entry, when moving from a
+                   bucket overflow into a bucket overflow.  */
+                cursor->next = new_bucket->next;
+                new_bucket->next = cursor;
+              }
+            else
+              {
+                /* Free an existing entry, when moving from a bucket
+                   overflow into a bucket header.  */
+                new_bucket->data = data;
+                dst->n_buckets_used++;
+                free_entry (dst, cursor);
+              }
+          }
+        /* Now move the bucket head.  Be sure that if we fail due to
+           allocation failure that the src table is in a consistent
+           state.  */
+        data = bucket->data;
+        bucket->next = NULL;
+        if (safe)
+          continue;
+        new_bucket = safe_hasher (dst, data);
+
+        if (new_bucket->data)
+          {
+            /* Allocate or recycle an entry, when moving from a bucket
+               header into a bucket overflow.  */
+            struct hash_entry *new_entry = allocate_entry (dst);
+
+            if (new_entry == NULL)
+              return false;
+
+            new_entry->data = data;
+            new_entry->next = new_bucket->next;
+            new_bucket->next = new_entry;
+          }
+        else
+          {
+            /* Move from one bucket header to another.  */
+            new_bucket->data = data;
+            dst->n_buckets_used++;
+          }
+        bucket->data = NULL;
+        src->n_buckets_used--;
+      }
+  return true;
+}
+
+bool
+hash_rehash (Hash_table *table, size_t candidate)
+{
+  Hash_table storage;
+  Hash_table *new_table;
+  size_t new_size = compute_bucket_size (candidate, table->tuning);
+
+  if (!new_size)
+    return false;
+  if (new_size == table->n_buckets)
+    return true;
+  new_table = &storage;
+  new_table->bucket = calloc (new_size, sizeof *new_table->bucket);
+  if (new_table->bucket == NULL)
+    return false;
+  new_table->n_buckets = new_size;
+  new_table->bucket_limit = new_table->bucket + new_size;
+  new_table->n_buckets_used = 0;
+  new_table->n_entries = 0;
+  new_table->tuning = table->tuning;
+  new_table->hasher = table->hasher;
+  new_table->comparator = table->comparator;
+  new_table->data_freer = table->data_freer;
+
+  /* In order for the transfer to successfully complete, we need
+     additional overflow entries when distinct buckets in the old
+     table collide into a common bucket in the new table.  The worst
+     case possible is a hasher that gives a good spread with the old
+     size, but returns a constant with the new size; if we were to
+     guarantee table->n_buckets_used-1 free entries in advance, then
+     the transfer would be guaranteed to not allocate memory.
+     However, for large tables, a guarantee of no further allocation
+     introduces a lot of extra memory pressure, all for an unlikely
+     corner case (most rehashes reduce, rather than increase, the
+     number of overflow entries needed).  So, we instead ensure that
+     the transfer process can be reversed if we hit a memory
+     allocation failure mid-transfer.  */
+
+  /* Merely reuse the extra old space into the new table.  */
+#if USE_OBSTACK
+  new_table->entry_stack = table->entry_stack;
+#endif
+  new_table->free_entry_list = table->free_entry_list;
+
+  if (transfer_entries (new_table, table, false))
+    {
+      /* Entries transferred successfully; tie up the loose ends.  */
+      free (table->bucket);
+      table->bucket = new_table->bucket;
+      table->bucket_limit = new_table->bucket_limit;
+      table->n_buckets = new_table->n_buckets;
+      table->n_buckets_used = new_table->n_buckets_used;
+      table->free_entry_list = new_table->free_entry_list;
+      /* table->n_entries and table->entry_stack already hold their value.  */
+      return true;
+    }
+
+  /* We've allocated new_table->bucket (and possibly some entries),
+     exhausted the free list, and moved some but not all entries into
+     new_table.  We must undo the partial move before returning
+     failure.  The only way to get into this situation is if new_table
+     uses fewer buckets than the old table, so we will reclaim some
+     free entries as overflows in the new table are put back into
+     distinct buckets in the old table.
+
+     There are some pathological cases where a single pass through the
+     table requires more intermediate overflow entries than using two
+     passes.  Two passes give worse cache performance and takes
+     longer, but at this point, we're already out of memory, so slow
+     and safe is better than failure.  */
+  table->free_entry_list = new_table->free_entry_list;
+  if (! (transfer_entries (table, new_table, true)
+         && transfer_entries (table, new_table, false)))
+    abort ();
+  /* table->n_entries already holds its value.  */
+  free (new_table->bucket);
+  return false;
+}
+
+int
+hash_insert_if_absent (Hash_table *table, void const *entry,
+                       void const **matched_ent)
+{
+  void *data;
+  struct hash_entry *bucket;
+
+  /* The caller cannot insert a NULL entry, since hash_lookup returns NULL
+     to indicate "not found", and hash_find_entry uses "bucket->data == NULL"
+     to indicate an empty bucket.  */
+  if (! entry)
+    abort ();
+
+  /* If there's a matching entry already in the table, return that.  */
+  if ((data = hash_find_entry (table, entry, &bucket, false)) != NULL)
+    {
+      if (matched_ent)
+        *matched_ent = data;
+      return 0;
+    }
+
+  /* If the growth threshold of the buckets in use has been reached, increase
+     the table size and rehash.  There's no point in checking the number of
+     entries:  if the hashing function is ill-conditioned, rehashing is not
+     likely to improve it.  */
+
+  if (table->n_buckets_used
+      > table->tuning->growth_threshold * table->n_buckets)
+    {
+      /* Check more fully, before starting real work.  If tuning arguments
+         became invalid, the second check will rely on proper defaults.  */
+      check_tuning (table);
+      if (table->n_buckets_used
+          > table->tuning->growth_threshold * table->n_buckets)
+        {
+          const Hash_tuning *tuning = table->tuning;
+          float candidate =
+            (tuning->is_n_buckets
+             ? (table->n_buckets * tuning->growth_factor)
+             : (table->n_buckets * tuning->growth_factor
+                * tuning->growth_threshold));
+
+          if ((float) SIZE_MAX <= candidate)
+            return -1;
+
+          /* If the rehash fails, arrange to return NULL.  */
+          if (!hash_rehash (table, candidate))
+            return -1;
+
+          /* Update the bucket we are interested in.  */
+          if (hash_find_entry (table, entry, &bucket, false) != NULL)
+            abort ();
+        }
+    }
+
+  /* ENTRY is not matched, it should be inserted.  */
+
+  if (bucket->data)
+    {
+      struct hash_entry *new_entry = allocate_entry (table);
+
+      if (new_entry == NULL)
+        return -1;
+
+      /* Add ENTRY in the overflow of the bucket.  */
+
+      new_entry->data = (void *) entry;
+      new_entry->next = bucket->next;
+      bucket->next = new_entry;
+      table->n_entries++;
+      return 1;
+    }
+
+  /* Add ENTRY right in the bucket head.  */
+
+  bucket->data = (void *) entry;
+  table->n_entries++;
+  table->n_buckets_used++;
+
+  return 1;
+}
+
+void *
+hash_insert (Hash_table *table, void const *entry)
+{
+  void const *matched_ent;
+  int err = hash_insert_if_absent (table, entry, &matched_ent);
+  return (err == -1
+          ? NULL
+          : (void *) (err == 0 ? matched_ent : entry));
+}
+
+void *
+hash_remove (Hash_table *table, const void *entry)
+{
+  void *data;
+  struct hash_entry *bucket;
+
+  data = hash_find_entry (table, entry, &bucket, true);
+  if (!data)
+    return NULL;
+
+  table->n_entries--;
+  if (!bucket->data)
+    {
+      table->n_buckets_used--;
+
+      /* If the shrink threshold of the buckets in use has been reached,
+         rehash into a smaller table.  */
+
+      if (table->n_buckets_used
+          < table->tuning->shrink_threshold * table->n_buckets)
+        {
+          /* Check more fully, before starting real work.  If tuning arguments
+             became invalid, the second check will rely on proper defaults.  */
+          check_tuning (table);
+          if (table->n_buckets_used
+              < table->tuning->shrink_threshold * table->n_buckets)
+            {
+              const Hash_tuning *tuning = table->tuning;
+              size_t candidate =
+                (tuning->is_n_buckets
+                 ? table->n_buckets * tuning->shrink_factor
+                 : (table->n_buckets * tuning->shrink_factor
+                    * tuning->growth_threshold));
+
+              if (!hash_rehash (table, candidate))
+                {
+                  /* Failure to allocate memory in an attempt to
+                     shrink the table is not fatal.  But since memory
+                     is low, we can at least be kind and free any
+                     spare entries, rather than keeping them tied up
+                     in the free entry list.  */
+#if ! USE_OBSTACK
+                  struct hash_entry *cursor = table->free_entry_list;
+                  struct hash_entry *next;
+                  while (cursor)
+                    {
+                      next = cursor->next;
+                      free (cursor);
+                      cursor = next;
+                    }
+                  table->free_entry_list = NULL;
+#endif
+                }
+            }
+        }
+    }
+
+  return data;
+}
+
+void *
+hash_delete (Hash_table *table, const void *entry)
+{
+  return hash_remove (table, entry);
+}
+
+/* Testing.  */
+
+#if TESTING
+
+void
+hash_print (const Hash_table *table)
+{
+  struct hash_entry *bucket = (struct hash_entry *) table->bucket;
+
+  for ( ; bucket < table->bucket_limit; bucket++)
+    {
+      struct hash_entry *cursor;
+
+      if (bucket)
+        printf ("%lu:\n", (unsigned long int) (bucket - table->bucket));
+
+      for (cursor = bucket; cursor; cursor = cursor->next)
+        {
+          char const *s = cursor->data;
+          /* FIXME */
+          if (s)
+            printf ("  %s\n", s);
+        }
+    }
+}
+
+#endif /* TESTING */
diff --git a/src/grep/lib/hash.h b/src/grep/lib/hash.h
new file mode 100644
index 0000000..5877b57
--- /dev/null
+++ b/src/grep/lib/hash.h
@@ -0,0 +1,264 @@
+/* hash - hashing table processing.
+   Copyright (C) 1998-1999, 2001, 2003, 2009-2021 Free Software Foundation,
+   Inc.
+   Written by Jim Meyering <meyering@ascend.com>, 1998.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* A generic hash table package.  */
+
+/* Make sure USE_OBSTACK is defined to 1 if you want the allocator to use
+   obstacks instead of malloc, and recompile 'hash.c' with same setting.  */
+
+#ifndef HASH_H_
+# define HASH_H_
+
+# include <stdio.h>
+# include <stdbool.h>
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+struct hash_tuning
+  {
+    /* This structure is mainly used for 'hash_initialize', see the block
+       documentation of 'hash_reset_tuning' for more complete comments.  */
+
+    float shrink_threshold;     /* ratio of used buckets to trigger a shrink */
+    float shrink_factor;        /* ratio of new smaller size to original size */
+    float growth_threshold;     /* ratio of used buckets to trigger a growth */
+    float growth_factor;        /* ratio of new bigger size to original size */
+    bool is_n_buckets;          /* if CANDIDATE really means table size */
+  };
+
+typedef struct hash_tuning Hash_tuning;
+
+struct hash_table;
+
+typedef struct hash_table Hash_table;
+
+/*
+ * Information and lookup.
+ */
+
+/* The following few functions provide information about the overall hash
+   table organization: the number of entries, number of buckets and maximum
+   length of buckets.  */
+
+/* Return the number of buckets in the hash table.  The table size, the total
+   number of buckets (used plus unused), or the maximum number of slots, are
+   the same quantity.  */
+extern size_t hash_get_n_buckets (const Hash_table *table)
+       _GL_ATTRIBUTE_PURE;
+
+/* Return the number of slots in use (non-empty buckets).  */
+extern size_t hash_get_n_buckets_used (const Hash_table *table)
+       _GL_ATTRIBUTE_PURE;
+
+/* Return the number of active entries.  */
+extern size_t hash_get_n_entries (const Hash_table *table)
+       _GL_ATTRIBUTE_PURE;
+
+/* Return the length of the longest chain (bucket).  */
+extern size_t hash_get_max_bucket_length (const Hash_table *table)
+       _GL_ATTRIBUTE_PURE;
+
+/* Do a mild validation of a hash table, by traversing it and checking two
+   statistics.  */
+extern bool hash_table_ok (const Hash_table *table)
+       _GL_ATTRIBUTE_PURE;
+
+extern void hash_print_statistics (const Hash_table *table, FILE *stream);
+
+/* If ENTRY matches an entry already in the hash table, return the
+   entry from the table.  Otherwise, return NULL.  */
+extern void *hash_lookup (const Hash_table *table, const void *entry);
+
+/*
+ * Walking.
+ */
+
+/* The functions in this page traverse the hash table and process the
+   contained entries.  For the traversal to work properly, the hash table
+   should not be resized nor modified while any particular entry is being
+   processed.  In particular, entries should not be added, and an entry
+   may be removed only if there is no shrink threshold and the entry being
+   removed has already been passed to hash_get_next.  */
+
+/* Return the first data in the table, or NULL if the table is empty.  */
+extern void *hash_get_first (const Hash_table *table)
+       _GL_ATTRIBUTE_PURE;
+
+/* Return the user data for the entry following ENTRY, where ENTRY has been
+   returned by a previous call to either 'hash_get_first' or 'hash_get_next'.
+   Return NULL if there are no more entries.  */
+extern void *hash_get_next (const Hash_table *table, const void *entry);
+
+/* Fill BUFFER with pointers to active user entries in the hash table, then
+   return the number of pointers copied.  Do not copy more than BUFFER_SIZE
+   pointers.  */
+extern size_t hash_get_entries (const Hash_table *table, void **buffer,
+                                size_t buffer_size);
+
+typedef bool (*Hash_processor) (void *entry, void *processor_data);
+
+/* Call a PROCESSOR function for each entry of a hash table, and return the
+   number of entries for which the processor function returned success.  A
+   pointer to some PROCESSOR_DATA which will be made available to each call to
+   the processor function.  The PROCESSOR accepts two arguments: the first is
+   the user entry being walked into, the second is the value of PROCESSOR_DATA
+   as received.  The walking continue for as long as the PROCESSOR function
+   returns nonzero.  When it returns zero, the walking is interrupted.  */
+extern size_t hash_do_for_each (const Hash_table *table,
+                                Hash_processor processor, void *processor_data);
+
+/*
+ * Allocation and clean-up.
+ */
+
+/* Return a hash index for a NUL-terminated STRING between 0 and N_BUCKETS-1.
+   This is a convenience routine for constructing other hashing functions.  */
+extern size_t hash_string (const char *string, size_t n_buckets)
+       _GL_ATTRIBUTE_PURE;
+
+extern void hash_reset_tuning (Hash_tuning *tuning);
+
+typedef size_t (*Hash_hasher) (const void *entry, size_t table_size);
+typedef bool (*Hash_comparator) (const void *entry1, const void *entry2);
+typedef void (*Hash_data_freer) (void *entry);
+
+/* Reclaim all storage associated with a hash table.  If a data_freer
+   function has been supplied by the user when the hash table was created,
+   this function applies it to the data of each entry before freeing that
+   entry.  */
+extern void hash_free (Hash_table *table);
+
+/* Allocate and return a new hash table, or NULL upon failure.  The initial
+   number of buckets is automatically selected so as to _guarantee_ that you
+   may insert at least CANDIDATE different user entries before any growth of
+   the hash table size occurs.  So, if have a reasonably tight a-priori upper
+   bound on the number of entries you intend to insert in the hash table, you
+   may save some table memory and insertion time, by specifying it here.  If
+   the IS_N_BUCKETS field of the TUNING structure is true, the CANDIDATE
+   argument has its meaning changed to the wanted number of buckets.
+
+   TUNING points to a structure of user-supplied values, in case some fine
+   tuning is wanted over the default behavior of the hasher.  If TUNING is
+   NULL, the default tuning parameters are used instead.  If TUNING is
+   provided but the values requested are out of bounds or might cause
+   rounding errors, return NULL.
+
+   The user-supplied HASHER function, when not NULL, accepts two
+   arguments ENTRY and TABLE_SIZE.  It computes, by hashing ENTRY contents, a
+   slot number for that entry which should be in the range 0..TABLE_SIZE-1.
+   This slot number is then returned.
+
+   The user-supplied COMPARATOR function, when not NULL, accepts two
+   arguments pointing to user data, it then returns true for a pair of entries
+   that compare equal, or false otherwise.  This function is internally called
+   on entries which are already known to hash to the same bucket index,
+   but which are distinct pointers.
+
+   The user-supplied DATA_FREER function, when not NULL, may be later called
+   with the user data as an argument, just before the entry containing the
+   data gets freed.  This happens from within 'hash_free' or 'hash_clear'.
+   You should specify this function only if you want these functions to free
+   all of your 'data' data.  This is typically the case when your data is
+   simply an auxiliary struct that you have malloc'd to aggregate several
+   values.  */
+_GL_ATTRIBUTE_NODISCARD
+extern Hash_table *hash_initialize (size_t candidate,
+                                    const Hash_tuning *tuning,
+                                    Hash_hasher hasher,
+                                    Hash_comparator comparator,
+                                    Hash_data_freer data_freer)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC (hash_free, 1);
+
+/* Same as hash_initialize, but invokes xalloc_die on memory exhaustion.  */
+/* This function is defined by module 'xhash'.  */
+_GL_ATTRIBUTE_NODISCARD
+extern Hash_table *hash_xinitialize (size_t candidate,
+                                     const Hash_tuning *tuning,
+                                     Hash_hasher hasher,
+                                     Hash_comparator comparator,
+                                     Hash_data_freer data_freer)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC (hash_free, 1)
+  _GL_ATTRIBUTE_RETURNS_NONNULL;
+
+/* Make all buckets empty, placing any chained entries on the free list.
+   Apply the user-specified function data_freer (if any) to the datas of any
+   affected entries.  */
+extern void hash_clear (Hash_table *table);
+
+/*
+ * Insertion and deletion.
+ */
+
+/* For an already existing hash table, change the number of buckets through
+   specifying CANDIDATE.  The contents of the hash table are preserved.  The
+   new number of buckets is automatically selected so as to _guarantee_ that
+   the table may receive at least CANDIDATE different user entries, including
+   those already in the table, before any other growth of the hash table size
+   occurs.  If TUNING->IS_N_BUCKETS is true, then CANDIDATE specifies the
+   exact number of buckets desired.  Return true iff the rehash succeeded.  */
+_GL_ATTRIBUTE_NODISCARD
+extern bool hash_rehash (Hash_table *table, size_t candidate);
+
+/* If ENTRY matches an entry already in the hash table, return the pointer
+   to the entry from the table.  Otherwise, insert ENTRY and return ENTRY.
+   Return NULL if the storage required for insertion cannot be allocated.
+   This implementation does not support duplicate entries or insertion of
+   NULL.  */
+_GL_ATTRIBUTE_NODISCARD
+extern void *hash_insert (Hash_table *table, const void *entry);
+
+/* Same as hash_insert, but invokes xalloc_die on memory exhaustion.  */
+/* This function is defined by module 'xhash'.  */
+extern void *hash_xinsert (Hash_table *table, const void *entry);
+
+/* Insert ENTRY into hash TABLE if there is not already a matching entry.
+
+   Return -1 upon memory allocation failure.
+   Return 1 if insertion succeeded.
+   Return 0 if there is already a matching entry in the table,
+   and in that case, if MATCHED_ENT is non-NULL, set *MATCHED_ENT
+   to that entry.
+
+   This interface is easier to use than hash_insert when you must
+   distinguish between the latter two cases.  More importantly,
+   hash_insert is unusable for some types of ENTRY values.  When using
+   hash_insert, the only way to distinguish those cases is to compare
+   the return value and ENTRY.  That works only when you can have two
+   different ENTRY values that point to data that compares "equal".  Thus,
+   when the ENTRY value is a simple scalar, you must use
+   hash_insert_if_absent.  ENTRY must not be NULL.  */
+extern int hash_insert_if_absent (Hash_table *table, const void *entry,
+                                  const void **matched_ent);
+
+/* If ENTRY is already in the table, remove it and return the just-deleted
+   data (the user may want to deallocate its storage).  If ENTRY is not in the
+   table, don't modify the table and return NULL.  */
+extern void *hash_remove (Hash_table *table, const void *entry);
+
+/* Same as hash_remove.  This interface is deprecated.
+   FIXME: Remove in 2022.  */
+_GL_ATTRIBUTE_DEPRECATED
+extern void *hash_delete (Hash_table *table, const void *entry);
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
diff --git a/src/grep/lib/i-ring.c b/src/grep/lib/i-ring.c
new file mode 100644
index 0000000..89c1dcc
--- /dev/null
+++ b/src/grep/lib/i-ring.c
@@ -0,0 +1,68 @@
+/* a simple ring buffer
+   Copyright (C) 2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering */
+
+#include <config.h>
+#include "i-ring.h"
+
+#include <stdlib.h>
+
+void
+i_ring_init (I_ring *ir, int default_val)
+{
+  int i;
+  ir->ir_empty = true;
+  ir->ir_front = 0;
+  ir->ir_back = 0;
+  for (i = 0; i < I_RING_SIZE; i++)
+    ir->ir_data[i] = default_val;
+  ir->ir_default_val = default_val;
+}
+
+bool
+i_ring_empty (I_ring const *ir)
+{
+  return ir->ir_empty;
+}
+
+int
+i_ring_push (I_ring *ir, int val)
+{
+  unsigned int dest_idx = (ir->ir_front + !ir->ir_empty) % I_RING_SIZE;
+  int old_val = ir->ir_data[dest_idx];
+  ir->ir_data[dest_idx] = val;
+  ir->ir_front = dest_idx;
+  if (dest_idx == ir->ir_back)
+    ir->ir_back = (ir->ir_back + !ir->ir_empty) % I_RING_SIZE;
+  ir->ir_empty = false;
+  return old_val;
+}
+
+int
+i_ring_pop (I_ring *ir)
+{
+  int top_val;
+  if (i_ring_empty (ir))
+    abort ();
+  top_val = ir->ir_data[ir->ir_front];
+  ir->ir_data[ir->ir_front] = ir->ir_default_val;
+  if (ir->ir_front == ir->ir_back)
+    ir->ir_empty = true;
+  else
+    ir->ir_front = ((ir->ir_front + I_RING_SIZE - 1) % I_RING_SIZE);
+  return top_val;
+}
diff --git a/src/grep/lib/i-ring.h b/src/grep/lib/i-ring.h
new file mode 100644
index 0000000..e75e846
--- /dev/null
+++ b/src/grep/lib/i-ring.h
@@ -0,0 +1,44 @@
+/* definitions for a simple ring buffer
+   Copyright (C) 2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <stdbool.h>
+#include "verify.h"
+
+enum { I_RING_SIZE = 4 };
+verify (1 <= I_RING_SIZE);
+
+/* When ir_empty is true, the ring is empty.
+   Otherwise, ir_data[B..F] are defined, where B..F is the contiguous
+   range of indices, modulo I_RING_SIZE, from back to front, inclusive.
+   Undefined elements of ir_data are always set to ir_default_val.
+   Popping from an empty ring aborts.
+   Pushing onto a full ring returns the displaced value.
+   An empty ring has F==B and ir_empty == true.
+   A ring with one entry still has F==B, but now ir_empty == false.  */
+struct I_ring
+{
+  int ir_data[I_RING_SIZE];
+  int ir_default_val;
+  unsigned int ir_front;
+  unsigned int ir_back;
+  bool ir_empty;
+};
+typedef struct I_ring I_ring;
+
+void i_ring_init (I_ring *ir, int ir_default_val);
+int i_ring_push (I_ring *ir, int val);
+int i_ring_pop (I_ring *ir);
+bool i_ring_empty (I_ring const *ir) _GL_ATTRIBUTE_PURE;
diff --git a/src/grep/lib/ialloc.c b/src/grep/lib/ialloc.c
new file mode 100644
index 0000000..f506b84
--- /dev/null
+++ b/src/grep/lib/ialloc.c
@@ -0,0 +1,21 @@
+/* malloc with idx_t rather than size_t
+
+   Copyright 2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#define IALLOC_INLINE _GL_EXTERN_INLINE
+#include "ialloc.h"
diff --git a/src/grep/lib/ialloc.h b/src/grep/lib/ialloc.h
new file mode 100644
index 0000000..5ceda46
--- /dev/null
+++ b/src/grep/lib/ialloc.h
@@ -0,0 +1,100 @@
+/* ialloc.h -- malloc with idx_t rather than size_t
+
+   Copyright 2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef IALLOC_H_
+#define IALLOC_H_
+
+#include "idx.h"
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef IALLOC_INLINE
+# define IALLOC_INLINE _GL_INLINE
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+IALLOC_INLINE void * _GL_ATTRIBUTE_COLD
+_gl_alloc_nomem (void)
+{
+  errno = ENOMEM;
+  return NULL;
+}
+
+IALLOC_INLINE
+_GL_ATTRIBUTE_MALLOC /*_GL_ATTRIBUTE_DEALLOC_FREE*/
+void *
+imalloc (idx_t s)
+{
+  return s <= SIZE_MAX ? malloc (s) : _gl_alloc_nomem ();
+}
+
+IALLOC_INLINE
+/*_GL_ATTRIBUTE_DEALLOC_FREE*/
+void *
+irealloc (void *p, idx_t s)
+{
+  /* Work around GNU realloc glitch by treating a zero size as if it
+     were 1, so that returning NULL is equivalent to failing.  */
+  return s <= SIZE_MAX ? realloc (p, s | !s) : _gl_alloc_nomem ();
+}
+
+IALLOC_INLINE
+_GL_ATTRIBUTE_MALLOC /*_GL_ATTRIBUTE_DEALLOC_FREE*/
+void *
+icalloc (idx_t n, idx_t s)
+{
+  if (SIZE_MAX < n)
+    {
+      if (s != 0)
+        return _gl_alloc_nomem ();
+      n = 0;
+    }
+  if (SIZE_MAX < s)
+    {
+      if (n != 0)
+        return _gl_alloc_nomem ();
+      s = 0;
+    }
+  return calloc (n, s);
+}
+
+IALLOC_INLINE void *
+ireallocarray (void *p, idx_t n, idx_t s)
+{
+  /* Work around GNU reallocarray glitch by treating a zero size as if
+     it were 1, so that returning NULL is equivalent to failing.  */
+  if (n == 0 || s == 0)
+    n = s = 1;
+  return (n <= SIZE_MAX && s <= SIZE_MAX
+          ? reallocarray (p, n, s)
+          : _gl_alloc_nomem ());
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/src/grep/lib/iconv.c b/src/grep/lib/iconv.c
new file mode 100644
index 0000000..bf51493
--- /dev/null
+++ b/src/grep/lib/iconv.c
@@ -0,0 +1,446 @@
+/* Character set conversion.
+   Copyright (C) 1999-2001, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <iconv.h>
+
+#include <stddef.h>
+
+#if REPLACE_ICONV_UTF
+# include <errno.h>
+# include <stdint.h>
+# include <stdlib.h>
+# include "unistr.h"
+#endif
+
+#if REPLACE_ICONV_UTF
+
+/* UTF-{16,32}{BE,LE} converters taken from GNU libiconv 1.11.  */
+
+/* Return code if invalid. (xxx_mbtowc) */
+# define RET_ILSEQ      -1
+/* Return code if no bytes were read. (xxx_mbtowc) */
+# define RET_TOOFEW     -2
+
+/* Return code if invalid. (xxx_wctomb) */
+# define RET_ILUNI      -1
+/* Return code if output buffer is too small. (xxx_wctomb, xxx_reset) */
+# define RET_TOOSMALL   -2
+
+/*
+ * UTF-16BE
+ */
+
+/* Specification: RFC 2781 */
+
+static int
+utf16be_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n)
+{
+  if (n >= 2)
+    {
+      ucs4_t wc = (s[0] << 8) + s[1];
+      if (wc >= 0xd800 && wc < 0xdc00)
+        {
+          if (n >= 4)
+            {
+              ucs4_t wc2 = (s[2] << 8) + s[3];
+              if (!(wc2 >= 0xdc00 && wc2 < 0xe000))
+                return RET_ILSEQ;
+              *pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00);
+              return 4;
+            }
+        }
+      else if (wc >= 0xdc00 && wc < 0xe000)
+        {
+          return RET_ILSEQ;
+        }
+      else
+        {
+          *pwc = wc;
+          return 2;
+        }
+    }
+  return RET_TOOFEW;
+}
+
+static int
+utf16be_wctomb (unsigned char *r, ucs4_t wc, size_t n)
+{
+  if (!(wc >= 0xd800 && wc < 0xe000))
+    {
+      if (wc < 0x10000)
+        {
+          if (n >= 2)
+            {
+              r[0] = (unsigned char) (wc >> 8);
+              r[1] = (unsigned char) wc;
+              return 2;
+            }
+          else
+            return RET_TOOSMALL;
+        }
+      else if (wc < 0x110000)
+        {
+          if (n >= 4)
+            {
+              ucs4_t wc1 = 0xd800 + ((wc - 0x10000) >> 10);
+              ucs4_t wc2 = 0xdc00 + ((wc - 0x10000) & 0x3ff);
+              r[0] = (unsigned char) (wc1 >> 8);
+              r[1] = (unsigned char) wc1;
+              r[2] = (unsigned char) (wc2 >> 8);
+              r[3] = (unsigned char) wc2;
+              return 4;
+            }
+          else
+            return RET_TOOSMALL;
+        }
+    }
+  return RET_ILUNI;
+}
+
+/*
+ * UTF-16LE
+ */
+
+/* Specification: RFC 2781 */
+
+static int
+utf16le_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n)
+{
+  if (n >= 2)
+    {
+      ucs4_t wc = s[0] + (s[1] << 8);
+      if (wc >= 0xd800 && wc < 0xdc00)
+        {
+          if (n >= 4)
+            {
+              ucs4_t wc2 = s[2] + (s[3] << 8);
+              if (!(wc2 >= 0xdc00 && wc2 < 0xe000))
+                return RET_ILSEQ;
+              *pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00);
+              return 4;
+            }
+        }
+      else if (wc >= 0xdc00 && wc < 0xe000)
+        {
+          return RET_ILSEQ;
+        }
+      else
+        {
+          *pwc = wc;
+          return 2;
+        }
+    }
+  return RET_TOOFEW;
+}
+
+static int
+utf16le_wctomb (unsigned char *r, ucs4_t wc, size_t n)
+{
+  if (!(wc >= 0xd800 && wc < 0xe000))
+    {
+      if (wc < 0x10000)
+        {
+          if (n >= 2)
+            {
+              r[0] = (unsigned char) wc;
+              r[1] = (unsigned char) (wc >> 8);
+              return 2;
+            }
+          else
+            return RET_TOOSMALL;
+        }
+      else if (wc < 0x110000)
+        {
+          if (n >= 4)
+            {
+              ucs4_t wc1 = 0xd800 + ((wc - 0x10000) >> 10);
+              ucs4_t wc2 = 0xdc00 + ((wc - 0x10000) & 0x3ff);
+              r[0] = (unsigned char) wc1;
+              r[1] = (unsigned char) (wc1 >> 8);
+              r[2] = (unsigned char) wc2;
+              r[3] = (unsigned char) (wc2 >> 8);
+              return 4;
+            }
+          else
+            return RET_TOOSMALL;
+        }
+    }
+  return RET_ILUNI;
+}
+
+/*
+ * UTF-32BE
+ */
+
+/* Specification: Unicode 3.1 Standard Annex #19 */
+
+static int
+utf32be_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n)
+{
+  if (n >= 4)
+    {
+      ucs4_t wc = (s[0] << 24) + (s[1] << 16) + (s[2] << 8) + s[3];
+      if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000))
+        {
+          *pwc = wc;
+          return 4;
+        }
+      else
+        return RET_ILSEQ;
+    }
+  return RET_TOOFEW;
+}
+
+static int
+utf32be_wctomb (unsigned char *r, ucs4_t wc, size_t n)
+{
+  if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000))
+    {
+      if (n >= 4)
+        {
+          r[0] = 0;
+          r[1] = (unsigned char) (wc >> 16);
+          r[2] = (unsigned char) (wc >> 8);
+          r[3] = (unsigned char) wc;
+          return 4;
+        }
+      else
+        return RET_TOOSMALL;
+    }
+  return RET_ILUNI;
+}
+
+/*
+ * UTF-32LE
+ */
+
+/* Specification: Unicode 3.1 Standard Annex #19 */
+
+static int
+utf32le_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n)
+{
+  if (n >= 4)
+    {
+      ucs4_t wc = s[0] + (s[1] << 8) + (s[2] << 16) + (s[3] << 24);
+      if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000))
+        {
+          *pwc = wc;
+          return 4;
+        }
+      else
+        return RET_ILSEQ;
+    }
+  return RET_TOOFEW;
+}
+
+static int
+utf32le_wctomb (unsigned char *r, ucs4_t wc, size_t n)
+{
+  if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000))
+    {
+      if (n >= 4)
+        {
+          r[0] = (unsigned char) wc;
+          r[1] = (unsigned char) (wc >> 8);
+          r[2] = (unsigned char) (wc >> 16);
+          r[3] = 0;
+          return 4;
+        }
+      else
+        return RET_TOOSMALL;
+    }
+  return RET_ILUNI;
+}
+
+#endif
+
+size_t
+rpl_iconv (iconv_t cd,
+           ICONV_CONST char **inbuf, size_t *inbytesleft,
+           char **outbuf, size_t *outbytesleft)
+#undef iconv
+{
+#if REPLACE_ICONV_UTF
+  switch ((uintptr_t) cd)
+    {
+      {
+        int (*xxx_wctomb) (unsigned char *, ucs4_t, size_t);
+
+        case (uintptr_t) _ICONV_UTF8_UTF16BE:
+          xxx_wctomb = utf16be_wctomb;
+          goto loop_from_utf8;
+        case (uintptr_t) _ICONV_UTF8_UTF16LE:
+          xxx_wctomb = utf16le_wctomb;
+          goto loop_from_utf8;
+        case (uintptr_t) _ICONV_UTF8_UTF32BE:
+          xxx_wctomb = utf32be_wctomb;
+          goto loop_from_utf8;
+        case (uintptr_t) _ICONV_UTF8_UTF32LE:
+          xxx_wctomb = utf32le_wctomb;
+          goto loop_from_utf8;
+
+       loop_from_utf8:
+        if (inbuf == NULL || *inbuf == NULL)
+          return 0;
+        {
+          ICONV_CONST char *inptr = *inbuf;
+          size_t inleft = *inbytesleft;
+          char *outptr = *outbuf;
+          size_t outleft = *outbytesleft;
+          size_t res = 0;
+          while (inleft > 0)
+            {
+              ucs4_t uc;
+              int m = u8_mbtoucr (&uc, (const uint8_t *) inptr, inleft);
+              if (m <= 0)
+                {
+                  if (m == -1)
+                    {
+                      errno = EILSEQ;
+                      res = (size_t)(-1);
+                      break;
+                    }
+                  if (m == -2)
+                    {
+                      errno = EINVAL;
+                      res = (size_t)(-1);
+                      break;
+                    }
+                  abort ();
+                }
+              else
+                {
+                  int n = xxx_wctomb ((uint8_t *) outptr, uc, outleft);
+                  if (n < 0)
+                    {
+                      if (n == RET_ILUNI)
+                        {
+                          errno = EILSEQ;
+                          res = (size_t)(-1);
+                          break;
+                        }
+                      if (n == RET_TOOSMALL)
+                        {
+                          errno = E2BIG;
+                          res = (size_t)(-1);
+                          break;
+                        }
+                      abort ();
+                    }
+                  else
+                    {
+                      inptr += m;
+                      inleft -= m;
+                      outptr += n;
+                      outleft -= n;
+                    }
+                }
+            }
+          *inbuf = inptr;
+          *inbytesleft = inleft;
+          *outbuf = outptr;
+          *outbytesleft = outleft;
+          return res;
+        }
+      }
+
+      {
+        int (*xxx_mbtowc) (ucs4_t *, const unsigned char *, size_t);
+
+        case (uintptr_t) _ICONV_UTF16BE_UTF8:
+          xxx_mbtowc = utf16be_mbtowc;
+          goto loop_to_utf8;
+        case (uintptr_t) _ICONV_UTF16LE_UTF8:
+          xxx_mbtowc = utf16le_mbtowc;
+          goto loop_to_utf8;
+        case (uintptr_t) _ICONV_UTF32BE_UTF8:
+          xxx_mbtowc = utf32be_mbtowc;
+          goto loop_to_utf8;
+        case (uintptr_t) _ICONV_UTF32LE_UTF8:
+          xxx_mbtowc = utf32le_mbtowc;
+          goto loop_to_utf8;
+
+       loop_to_utf8:
+        if (inbuf == NULL || *inbuf == NULL)
+          return 0;
+        {
+          ICONV_CONST char *inptr = *inbuf;
+          size_t inleft = *inbytesleft;
+          char *outptr = *outbuf;
+          size_t outleft = *outbytesleft;
+          size_t res = 0;
+          while (inleft > 0)
+            {
+              ucs4_t uc;
+              int m = xxx_mbtowc (&uc, (const uint8_t *) inptr, inleft);
+              if (m <= 0)
+                {
+                  if (m == RET_ILSEQ)
+                    {
+                      errno = EILSEQ;
+                      res = (size_t)(-1);
+                      break;
+                    }
+                  if (m == RET_TOOFEW)
+                    {
+                      errno = EINVAL;
+                      res = (size_t)(-1);
+                      break;
+                    }
+                  abort ();
+                }
+              else
+                {
+                  int n = u8_uctomb ((uint8_t *) outptr, uc, outleft);
+                  if (n < 0)
+                    {
+                      if (n == -1)
+                        {
+                          errno = EILSEQ;
+                          res = (size_t)(-1);
+                          break;
+                        }
+                      if (n == -2)
+                        {
+                          errno = E2BIG;
+                          res = (size_t)(-1);
+                          break;
+                        }
+                      abort ();
+                    }
+                  else
+                    {
+                      inptr += m;
+                      inleft -= m;
+                      outptr += n;
+                      outleft -= n;
+                    }
+                }
+            }
+          *inbuf = inptr;
+          *inbytesleft = inleft;
+          *outbuf = outptr;
+          *outbytesleft = outleft;
+          return res;
+        }
+      }
+    }
+#endif
+  return iconv (cd, inbuf, inbytesleft, outbuf, outbytesleft);
+}
diff --git a/src/grep/lib/iconv.in.h b/src/grep/lib/iconv.in.h
new file mode 100644
index 0000000..3a2f94e
--- /dev/null
+++ b/src/grep/lib/iconv.in.h
@@ -0,0 +1,127 @@
+/* A GNU-like <iconv.h>.
+
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _@GUARD_PREFIX@_ICONV_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard.  */
+#@INCLUDE_NEXT@ @NEXT_ICONV_H@
+
+#ifndef _@GUARD_PREFIX@_ICONV_H
+#define _@GUARD_PREFIX@_ICONV_H
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+
+#if @GNULIB_ICONV@
+# if @REPLACE_ICONV_OPEN@
+/* An iconv_open wrapper that supports the IANA standardized encoding names
+   ("ISO-8859-1" etc.) as far as possible.  */
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define iconv_open rpl_iconv_open
+#  endif
+_GL_FUNCDECL_RPL (iconv_open, iconv_t,
+                  (const char *tocode, const char *fromcode)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (iconv_open, iconv_t,
+                  (const char *tocode, const char *fromcode));
+# else
+_GL_CXXALIAS_SYS (iconv_open, iconv_t,
+                  (const char *tocode, const char *fromcode));
+# endif
+_GL_CXXALIASWARN (iconv_open);
+#elif defined GNULIB_POSIXCHECK
+# undef iconv_open
+# if HAVE_RAW_DECL_ICONV_OPEN
+_GL_WARN_ON_USE (iconv_open, "iconv_open is not working correctly everywhere - "
+                 "use gnulib module iconv for portability");
+# endif
+#endif
+
+#if @REPLACE_ICONV_UTF@
+/* Special constants for supporting UTF-{16,32}{BE,LE} encodings.
+   Not public.  */
+# define _ICONV_UTF8_UTF16BE (iconv_t)(-161)
+# define _ICONV_UTF8_UTF16LE (iconv_t)(-162)
+# define _ICONV_UTF8_UTF32BE (iconv_t)(-163)
+# define _ICONV_UTF8_UTF32LE (iconv_t)(-164)
+# define _ICONV_UTF16BE_UTF8 (iconv_t)(-165)
+# define _ICONV_UTF16LE_UTF8 (iconv_t)(-166)
+# define _ICONV_UTF32BE_UTF8 (iconv_t)(-167)
+# define _ICONV_UTF32LE_UTF8 (iconv_t)(-168)
+#endif
+
+#if @GNULIB_ICONV@
+# if @REPLACE_ICONV@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define iconv rpl_iconv
+#  endif
+_GL_FUNCDECL_RPL (iconv, size_t,
+                  (iconv_t cd,
+                   @ICONV_CONST@ char **restrict inbuf,
+                   size_t *restrict inbytesleft,
+                   char **restrict outbuf, size_t *restrict outbytesleft));
+_GL_CXXALIAS_RPL (iconv, size_t,
+                  (iconv_t cd,
+                   @ICONV_CONST@ char **restrict inbuf,
+                   size_t *restrict inbytesleft,
+                   char **restrict outbuf, size_t *restrict outbytesleft));
+# else
+/* Need to cast, because on some versions of Solaris, ICONV_CONST does
+   not have the right value for C++.  */
+_GL_CXXALIAS_SYS_CAST (iconv, size_t,
+                       (iconv_t cd,
+                        @ICONV_CONST@ char **restrict inbuf,
+                        size_t *restrict inbytesleft,
+                        char **restrict outbuf, size_t *restrict outbytesleft));
+# endif
+_GL_CXXALIASWARN (iconv);
+# ifndef ICONV_CONST
+#  define ICONV_CONST @ICONV_CONST@
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef iconv
+# if HAVE_RAW_DECL_ICONV
+_GL_WARN_ON_USE (iconv, "iconv is not working correctly everywhere - "
+                 "use gnulib module iconv for portability");
+# endif
+#endif
+
+#if @GNULIB_ICONV@
+# if @REPLACE_ICONV@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define iconv_close rpl_iconv_close
+#  endif
+_GL_FUNCDECL_RPL (iconv_close, int, (iconv_t cd));
+_GL_CXXALIAS_RPL (iconv_close, int, (iconv_t cd));
+# else
+_GL_CXXALIAS_SYS (iconv_close, int, (iconv_t cd));
+# endif
+_GL_CXXALIASWARN (iconv_close);
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_ICONV_H */
+#endif /* _@GUARD_PREFIX@_ICONV_H */
diff --git a/src/grep/lib/iconv_close.c b/src/grep/lib/iconv_close.c
new file mode 100644
index 0000000..7429b92
--- /dev/null
+++ b/src/grep/lib/iconv_close.c
@@ -0,0 +1,43 @@
+/* Character set conversion.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <iconv.h>
+
+#include <stdint.h>
+
+int
+rpl_iconv_close (iconv_t cd)
+#undef iconv_close
+{
+#if REPLACE_ICONV_UTF
+  switch ((uintptr_t) cd)
+    {
+    case (uintptr_t) _ICONV_UTF8_UTF16BE:
+    case (uintptr_t) _ICONV_UTF8_UTF16LE:
+    case (uintptr_t) _ICONV_UTF8_UTF32BE:
+    case (uintptr_t) _ICONV_UTF8_UTF32LE:
+    case (uintptr_t) _ICONV_UTF16BE_UTF8:
+    case (uintptr_t) _ICONV_UTF16LE_UTF8:
+    case (uintptr_t) _ICONV_UTF32BE_UTF8:
+    case (uintptr_t) _ICONV_UTF32LE_UTF8:
+      return 0;
+    }
+#endif
+  return iconv_close (cd);
+}
diff --git a/src/grep/lib/iconv_open-aix.gperf b/src/grep/lib/iconv_open-aix.gperf
new file mode 100644
index 0000000..d073759
--- /dev/null
+++ b/src/grep/lib/iconv_open-aix.gperf
@@ -0,0 +1,60 @@
+/* Character set conversion.
+   Copyright (C) 2007, 2020-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+struct mapping { int standard_name; const char vendor_name[10 + 1]; };
+%struct-type
+%language=ANSI-C
+%define slot-name standard_name
+%define hash-function-name mapping_hash
+%define lookup-function-name mapping_lookup
+%readonly-tables
+%global-table
+%define word-array-name mappings
+%pic
+%%
+# On AIX 5.1, look in /usr/lib/nls/loc/uconvTable.
+ISO-8859-1, "ISO8859-1"
+ISO-8859-2, "ISO8859-2"
+ISO-8859-3, "ISO8859-3"
+ISO-8859-4, "ISO8859-4"
+ISO-8859-5, "ISO8859-5"
+ISO-8859-6, "ISO8859-6"
+ISO-8859-7, "ISO8859-7"
+ISO-8859-8, "ISO8859-8"
+ISO-8859-9, "ISO8859-9"
+ISO-8859-15, "ISO8859-15"
+CP437, "IBM-437"
+CP850, "IBM-850"
+CP852, "IBM-852"
+CP856, "IBM-856"
+CP857, "IBM-857"
+CP861, "IBM-861"
+CP865, "IBM-865"
+CP869, "IBM-869"
+ISO-8859-13, "IBM-921"
+CP922, "IBM-922"
+CP932, "IBM-932"
+CP943, "IBM-943"
+CP1046, "IBM-1046"
+CP1124, "IBM-1124"
+CP1125, "IBM-1125"
+CP1129, "IBM-1129"
+CP1252, "IBM-1252"
+GB2312, "IBM-eucCN"
+EUC-JP, "IBM-eucJP"
+EUC-KR, "IBM-eucKR"
+EUC-TW, "IBM-eucTW"
+BIG5, "big5"
diff --git a/src/grep/lib/iconv_open-aix.h b/src/grep/lib/iconv_open-aix.h
new file mode 100644
index 0000000..85ed767
--- /dev/null
+++ b/src/grep/lib/iconv_open-aix.h
@@ -0,0 +1,250 @@
+/* ANSI-C code produced by gperf version 3.1 */
+/* Command-line: gperf -m 10 ./iconv_open-aix.gperf  */
+/* Computed positions: -k'4,$' */
+
+#if !((' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
+      && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \
+      && (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \
+      && ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \
+      && ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \
+      && ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \
+      && ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \
+      && ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \
+      && ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \
+      && ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \
+      && ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \
+      && ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \
+      && ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \
+      && ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \
+      && ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \
+      && ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \
+      && ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \
+      && ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \
+      && ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \
+      && ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \
+      && ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \
+      && ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \
+      && ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126))
+/* The character set is not based on ISO-646.  */
+#error "gperf generated tables don't work with this execution character set. Please report a bug to <bug-gperf@gnu.org>."
+#endif
+
+#line 17 "./iconv_open-aix.gperf"
+struct mapping { int standard_name; const char vendor_name[10 + 1]; };
+
+#define TOTAL_KEYWORDS 32
+#define MIN_WORD_LENGTH 4
+#define MAX_WORD_LENGTH 11
+#define MIN_HASH_VALUE 6
+#define MAX_HASH_VALUE 44
+/* maximum key range = 39, duplicates = 0 */
+
+#ifdef __GNUC__
+__inline
+#else
+#ifdef __cplusplus
+inline
+#endif
+#endif
+static unsigned int
+mapping_hash (register const char *str, register size_t len)
+{
+  static const unsigned char asso_values[] =
+    {
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45,  0,  4, 25,
+       0, 11, 24,  9, 17,  3, 14, 21, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+       3, 45,  1, 45, 45, 45, 45,  0, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
+      45, 45, 45, 45, 45, 45, 45, 45
+    };
+  return len + asso_values[(unsigned char)str[3]+2] + asso_values[(unsigned char)str[len - 1]];
+}
+
+struct stringpool_t
+  {
+    char stringpool_str6[sizeof("EUC-TW")];
+    char stringpool_str7[sizeof("EUC-KR")];
+    char stringpool_str8[sizeof("CP852")];
+    char stringpool_str9[sizeof("EUC-JP")];
+    char stringpool_str10[sizeof("ISO-8859-2")];
+    char stringpool_str11[sizeof("CP857")];
+    char stringpool_str12[sizeof("CP850")];
+    char stringpool_str13[sizeof("ISO-8859-7")];
+    char stringpool_str14[sizeof("CP932")];
+    char stringpool_str15[sizeof("GB2312")];
+    char stringpool_str16[sizeof("BIG5")];
+    char stringpool_str17[sizeof("CP437")];
+    char stringpool_str19[sizeof("ISO-8859-5")];
+    char stringpool_str20[sizeof("ISO-8859-15")];
+    char stringpool_str21[sizeof("ISO-8859-3")];
+    char stringpool_str22[sizeof("ISO-8859-13")];
+    char stringpool_str23[sizeof("CP1046")];
+    char stringpool_str24[sizeof("ISO-8859-8")];
+    char stringpool_str25[sizeof("CP856")];
+    char stringpool_str26[sizeof("CP1125")];
+    char stringpool_str27[sizeof("ISO-8859-6")];
+    char stringpool_str28[sizeof("CP865")];
+    char stringpool_str29[sizeof("CP922")];
+    char stringpool_str30[sizeof("CP1252")];
+    char stringpool_str31[sizeof("ISO-8859-9")];
+    char stringpool_str33[sizeof("CP943")];
+    char stringpool_str34[sizeof("ISO-8859-4")];
+    char stringpool_str35[sizeof("ISO-8859-1")];
+    char stringpool_str38[sizeof("CP1129")];
+    char stringpool_str40[sizeof("CP869")];
+    char stringpool_str41[sizeof("CP1124")];
+    char stringpool_str44[sizeof("CP861")];
+  };
+static const struct stringpool_t stringpool_contents =
+  {
+    "EUC-TW",
+    "EUC-KR",
+    "CP852",
+    "EUC-JP",
+    "ISO-8859-2",
+    "CP857",
+    "CP850",
+    "ISO-8859-7",
+    "CP932",
+    "GB2312",
+    "BIG5",
+    "CP437",
+    "ISO-8859-5",
+    "ISO-8859-15",
+    "ISO-8859-3",
+    "ISO-8859-13",
+    "CP1046",
+    "ISO-8859-8",
+    "CP856",
+    "CP1125",
+    "ISO-8859-6",
+    "CP865",
+    "CP922",
+    "CP1252",
+    "ISO-8859-9",
+    "CP943",
+    "ISO-8859-4",
+    "ISO-8859-1",
+    "CP1129",
+    "CP869",
+    "CP1124",
+    "CP861"
+  };
+#define stringpool ((const char *) &stringpool_contents)
+
+static const struct mapping mappings[] =
+  {
+    {-1}, {-1}, {-1}, {-1}, {-1}, {-1},
+#line 59 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str6, "IBM-eucTW"},
+#line 58 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str7, "IBM-eucKR"},
+#line 41 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str8, "IBM-852"},
+#line 57 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str9, "IBM-eucJP"},
+#line 30 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str10, "ISO8859-2"},
+#line 43 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str11, "IBM-857"},
+#line 40 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str12, "IBM-850"},
+#line 35 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str13, "ISO8859-7"},
+#line 49 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str14, "IBM-932"},
+#line 56 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str15, "IBM-eucCN"},
+#line 60 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str16, "big5"},
+#line 39 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str17, "IBM-437"},
+    {-1},
+#line 33 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str19, "ISO8859-5"},
+#line 38 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str20, "ISO8859-15"},
+#line 31 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str21, "ISO8859-3"},
+#line 47 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str22, "IBM-921"},
+#line 51 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str23, "IBM-1046"},
+#line 36 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str24, "ISO8859-8"},
+#line 42 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str25, "IBM-856"},
+#line 53 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str26, "IBM-1125"},
+#line 34 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str27, "ISO8859-6"},
+#line 45 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str28, "IBM-865"},
+#line 48 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str29, "IBM-922"},
+#line 55 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str30, "IBM-1252"},
+#line 37 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str31, "ISO8859-9"},
+    {-1},
+#line 50 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str33, "IBM-943"},
+#line 32 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str34, "ISO8859-4"},
+#line 29 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str35, "ISO8859-1"},
+    {-1}, {-1},
+#line 54 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str38, "IBM-1129"},
+    {-1},
+#line 46 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str40, "IBM-869"},
+#line 52 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str41, "IBM-1124"},
+    {-1}, {-1},
+#line 44 "./iconv_open-aix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str44, "IBM-861"}
+  };
+
+const struct mapping *
+mapping_lookup (register const char *str, register size_t len)
+{
+  if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)
+    {
+      register unsigned int key = mapping_hash (str, len);
+
+      if (key <= MAX_HASH_VALUE)
+        {
+          register int o = mappings[key].standard_name;
+          if (o >= 0)
+            {
+              register const char *s = o + stringpool;
+
+              if (*str == *s && !strcmp (str + 1, s + 1))
+                return &mappings[key];
+            }
+        }
+    }
+  return 0;
+}
diff --git a/src/grep/lib/iconv_open-hpux.gperf b/src/grep/lib/iconv_open-hpux.gperf
new file mode 100644
index 0000000..f4664d6
--- /dev/null
+++ b/src/grep/lib/iconv_open-hpux.gperf
@@ -0,0 +1,72 @@
+/* Character set conversion.
+   Copyright (C) 2007, 2020-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+struct mapping { int standard_name; const char vendor_name[9 + 1]; };
+%struct-type
+%language=ANSI-C
+%define slot-name standard_name
+%define hash-function-name mapping_hash
+%define lookup-function-name mapping_lookup
+%readonly-tables
+%global-table
+%define word-array-name mappings
+%pic
+%%
+# On HP-UX 11.11, look in /usr/lib/nls/iconv.
+ISO-8859-1, "iso88591"
+ISO-8859-2, "iso88592"
+ISO-8859-5, "iso88595"
+ISO-8859-6, "iso88596"
+ISO-8859-7, "iso88597"
+ISO-8859-8, "iso88598"
+ISO-8859-9, "iso88599"
+ISO-8859-15, "iso885915"
+CP437, "cp437"
+CP775, "cp775"
+CP850, "cp850"
+CP852, "cp852"
+CP855, "cp855"
+CP857, "cp857"
+CP861, "cp861"
+CP862, "cp862"
+CP864, "cp864"
+CP865, "cp865"
+CP866, "cp866"
+CP869, "cp869"
+CP874, "cp874"
+CP1250, "cp1250"
+CP1251, "cp1251"
+CP1252, "cp1252"
+CP1253, "cp1253"
+CP1254, "cp1254"
+CP1255, "cp1255"
+CP1256, "cp1256"
+CP1257, "cp1257"
+CP1258, "cp1258"
+HP-ROMAN8, "roman8"
+HP-ARABIC8, "arabic8"
+HP-GREEK8, "greek8"
+HP-HEBREW8, "hebrew8"
+HP-TURKISH8, "turkish8"
+HP-KANA8, "kana8"
+TIS-620, "tis620"
+GB2312, "hp15CN"
+EUC-JP, "eucJP"
+EUC-KR, "eucKR"
+EUC-TW, "eucTW"
+BIG5, "big5"
+SHIFT_JIS, "sjis"
+UTF-8, "utf8"
diff --git a/src/grep/lib/iconv_open-hpux.h b/src/grep/lib/iconv_open-hpux.h
new file mode 100644
index 0000000..fe3c289
--- /dev/null
+++ b/src/grep/lib/iconv_open-hpux.h
@@ -0,0 +1,293 @@
+/* ANSI-C code produced by gperf version 3.1 */
+/* Command-line: gperf -m 10 ./iconv_open-hpux.gperf  */
+/* Computed positions: -k'4,$' */
+
+#if !((' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
+      && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \
+      && (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \
+      && ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \
+      && ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \
+      && ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \
+      && ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \
+      && ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \
+      && ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \
+      && ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \
+      && ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \
+      && ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \
+      && ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \
+      && ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \
+      && ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \
+      && ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \
+      && ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \
+      && ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \
+      && ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \
+      && ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \
+      && ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \
+      && ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \
+      && ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126))
+/* The character set is not based on ISO-646.  */
+#error "gperf generated tables don't work with this execution character set. Please report a bug to <bug-gperf@gnu.org>."
+#endif
+
+#line 17 "./iconv_open-hpux.gperf"
+struct mapping { int standard_name; const char vendor_name[9 + 1]; };
+
+#define TOTAL_KEYWORDS 44
+#define MIN_WORD_LENGTH 4
+#define MAX_WORD_LENGTH 11
+#define MIN_HASH_VALUE 6
+#define MAX_HASH_VALUE 49
+/* maximum key range = 44, duplicates = 0 */
+
+#ifdef __GNUC__
+__inline
+#else
+#ifdef __cplusplus
+inline
+#endif
+#endif
+static unsigned int
+mapping_hash (register const char *str, register size_t len)
+{
+  static const unsigned char asso_values[] =
+    {
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50,  1,  2,
+      24, 43,  5, 10,  0, 13, 32,  3, 19, 18,
+      50, 50, 50, 50, 50, 50, 50, 50, 50,  5,
+      50, 50, 50, 50, 14,  5,  0, 50, 50,  0,
+      27, 50, 12, 14, 50, 50,  0,  5,  2, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50,
+      50, 50, 50, 50, 50, 50, 50, 50, 50, 50
+    };
+  return len + asso_values[(unsigned char)str[3]+4] + asso_values[(unsigned char)str[len - 1]];
+}
+
+struct stringpool_t
+  {
+    char stringpool_str6[sizeof("CP1256")];
+    char stringpool_str7[sizeof("CP1250")];
+    char stringpool_str8[sizeof("CP1251")];
+    char stringpool_str9[sizeof("CP850")];
+    char stringpool_str10[sizeof("TIS-620")];
+    char stringpool_str11[sizeof("CP1254")];
+    char stringpool_str12[sizeof("ISO-8859-6")];
+    char stringpool_str13[sizeof("EUC-TW")];
+    char stringpool_str14[sizeof("ISO-8859-1")];
+    char stringpool_str15[sizeof("ISO-8859-9")];
+    char stringpool_str16[sizeof("CP1255")];
+    char stringpool_str17[sizeof("BIG5")];
+    char stringpool_str18[sizeof("CP855")];
+    char stringpool_str19[sizeof("CP1257")];
+    char stringpool_str20[sizeof("EUC-KR")];
+    char stringpool_str21[sizeof("CP857")];
+    char stringpool_str22[sizeof("ISO-8859-5")];
+    char stringpool_str23[sizeof("ISO-8859-15")];
+    char stringpool_str24[sizeof("CP866")];
+    char stringpool_str25[sizeof("ISO-8859-7")];
+    char stringpool_str26[sizeof("CP861")];
+    char stringpool_str27[sizeof("CP869")];
+    char stringpool_str28[sizeof("CP874")];
+    char stringpool_str29[sizeof("CP864")];
+    char stringpool_str30[sizeof("CP1252")];
+    char stringpool_str31[sizeof("CP437")];
+    char stringpool_str32[sizeof("CP852")];
+    char stringpool_str33[sizeof("CP775")];
+    char stringpool_str34[sizeof("CP865")];
+    char stringpool_str35[sizeof("EUC-JP")];
+    char stringpool_str36[sizeof("ISO-8859-2")];
+    char stringpool_str37[sizeof("SHIFT_JIS")];
+    char stringpool_str38[sizeof("CP1258")];
+    char stringpool_str39[sizeof("UTF-8")];
+    char stringpool_str40[sizeof("HP-KANA8")];
+    char stringpool_str41[sizeof("HP-ROMAN8")];
+    char stringpool_str42[sizeof("HP-HEBREW8")];
+    char stringpool_str43[sizeof("GB2312")];
+    char stringpool_str44[sizeof("ISO-8859-8")];
+    char stringpool_str45[sizeof("HP-TURKISH8")];
+    char stringpool_str46[sizeof("HP-GREEK8")];
+    char stringpool_str47[sizeof("HP-ARABIC8")];
+    char stringpool_str48[sizeof("CP862")];
+    char stringpool_str49[sizeof("CP1253")];
+  };
+static const struct stringpool_t stringpool_contents =
+  {
+    "CP1256",
+    "CP1250",
+    "CP1251",
+    "CP850",
+    "TIS-620",
+    "CP1254",
+    "ISO-8859-6",
+    "EUC-TW",
+    "ISO-8859-1",
+    "ISO-8859-9",
+    "CP1255",
+    "BIG5",
+    "CP855",
+    "CP1257",
+    "EUC-KR",
+    "CP857",
+    "ISO-8859-5",
+    "ISO-8859-15",
+    "CP866",
+    "ISO-8859-7",
+    "CP861",
+    "CP869",
+    "CP874",
+    "CP864",
+    "CP1252",
+    "CP437",
+    "CP852",
+    "CP775",
+    "CP865",
+    "EUC-JP",
+    "ISO-8859-2",
+    "SHIFT_JIS",
+    "CP1258",
+    "UTF-8",
+    "HP-KANA8",
+    "HP-ROMAN8",
+    "HP-HEBREW8",
+    "GB2312",
+    "ISO-8859-8",
+    "HP-TURKISH8",
+    "HP-GREEK8",
+    "HP-ARABIC8",
+    "CP862",
+    "CP1253"
+  };
+#define stringpool ((const char *) &stringpool_contents)
+
+static const struct mapping mappings[] =
+  {
+    {-1}, {-1}, {-1}, {-1}, {-1}, {-1},
+#line 56 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str6, "cp1256"},
+#line 50 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str7, "cp1250"},
+#line 51 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str8, "cp1251"},
+#line 39 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str9, "cp850"},
+#line 65 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str10, "tis620"},
+#line 54 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str11, "cp1254"},
+#line 32 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str12, "iso88596"},
+#line 69 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str13, "eucTW"},
+#line 29 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str14, "iso88591"},
+#line 35 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str15, "iso88599"},
+#line 55 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str16, "cp1255"},
+#line 70 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str17, "big5"},
+#line 41 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str18, "cp855"},
+#line 57 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str19, "cp1257"},
+#line 68 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str20, "eucKR"},
+#line 42 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str21, "cp857"},
+#line 31 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str22, "iso88595"},
+#line 36 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str23, "iso885915"},
+#line 47 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str24, "cp866"},
+#line 33 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str25, "iso88597"},
+#line 43 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str26, "cp861"},
+#line 48 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str27, "cp869"},
+#line 49 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str28, "cp874"},
+#line 45 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str29, "cp864"},
+#line 52 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str30, "cp1252"},
+#line 37 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str31, "cp437"},
+#line 40 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str32, "cp852"},
+#line 38 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str33, "cp775"},
+#line 46 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str34, "cp865"},
+#line 67 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str35, "eucJP"},
+#line 30 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str36, "iso88592"},
+#line 71 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str37, "sjis"},
+#line 58 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str38, "cp1258"},
+#line 72 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str39, "utf8"},
+#line 64 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str40, "kana8"},
+#line 59 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str41, "roman8"},
+#line 62 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str42, "hebrew8"},
+#line 66 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str43, "hp15CN"},
+#line 34 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str44, "iso88598"},
+#line 63 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str45, "turkish8"},
+#line 61 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str46, "greek8"},
+#line 60 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str47, "arabic8"},
+#line 44 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str48, "cp862"},
+#line 53 "./iconv_open-hpux.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str49, "cp1253"}
+  };
+
+const struct mapping *
+mapping_lookup (register const char *str, register size_t len)
+{
+  if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)
+    {
+      register unsigned int key = mapping_hash (str, len);
+
+      if (key <= MAX_HASH_VALUE)
+        {
+          register int o = mappings[key].standard_name;
+          if (o >= 0)
+            {
+              register const char *s = o + stringpool;
+
+              if (*str == *s && !strcmp (str + 1, s + 1))
+                return &mappings[key];
+            }
+        }
+    }
+  return 0;
+}
diff --git a/src/grep/lib/iconv_open-irix.gperf b/src/grep/lib/iconv_open-irix.gperf
new file mode 100644
index 0000000..9885d92
--- /dev/null
+++ b/src/grep/lib/iconv_open-irix.gperf
@@ -0,0 +1,47 @@
+/* Character set conversion.
+   Copyright (C) 2007, 2020-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+struct mapping { int standard_name; const char vendor_name[10 + 1]; };
+%struct-type
+%language=ANSI-C
+%define slot-name standard_name
+%define hash-function-name mapping_hash
+%define lookup-function-name mapping_lookup
+%readonly-tables
+%global-table
+%define word-array-name mappings
+%pic
+%%
+# On IRIX 6.5, look in /usr/lib/iconv and /usr/lib/international/encodings.
+ISO-8859-1, "ISO8859-1"
+ISO-8859-2, "ISO8859-2"
+ISO-8859-3, "ISO8859-3"
+ISO-8859-4, "ISO8859-4"
+ISO-8859-5, "ISO8859-5"
+ISO-8859-6, "ISO8859-6"
+ISO-8859-7, "ISO8859-7"
+ISO-8859-8, "ISO8859-8"
+ISO-8859-9, "ISO8859-9"
+ISO-8859-15, "ISO8859-15"
+KOI8-R, "KOI8"
+CP855, "DOS855"
+CP1251, "WIN1251"
+GB2312, "eucCN"
+EUC-JP, "eucJP"
+EUC-KR, "eucKR"
+EUC-TW, "eucTW"
+SHIFT_JIS, "sjis"
+TIS-620, "TIS620"
diff --git a/src/grep/lib/iconv_open-irix.h b/src/grep/lib/iconv_open-irix.h
new file mode 100644
index 0000000..9eec045
--- /dev/null
+++ b/src/grep/lib/iconv_open-irix.h
@@ -0,0 +1,193 @@
+/* ANSI-C code produced by gperf version 3.1 */
+/* Command-line: gperf -m 10 ./iconv_open-irix.gperf  */
+/* Computed positions: -k'1,$' */
+
+#if !((' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
+      && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \
+      && (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \
+      && ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \
+      && ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \
+      && ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \
+      && ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \
+      && ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \
+      && ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \
+      && ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \
+      && ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \
+      && ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \
+      && ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \
+      && ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \
+      && ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \
+      && ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \
+      && ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \
+      && ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \
+      && ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \
+      && ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \
+      && ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \
+      && ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \
+      && ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126))
+/* The character set is not based on ISO-646.  */
+#error "gperf generated tables don't work with this execution character set. Please report a bug to <bug-gperf@gnu.org>."
+#endif
+
+#line 17 "./iconv_open-irix.gperf"
+struct mapping { int standard_name; const char vendor_name[10 + 1]; };
+
+#define TOTAL_KEYWORDS 19
+#define MIN_WORD_LENGTH 5
+#define MAX_WORD_LENGTH 11
+#define MIN_HASH_VALUE 5
+#define MAX_HASH_VALUE 23
+/* maximum key range = 19, duplicates = 0 */
+
+#ifdef __GNUC__
+__inline
+#else
+#ifdef __cplusplus
+inline
+#endif
+#endif
+static unsigned int
+mapping_hash (register const char *str, register size_t len)
+{
+  static const unsigned char asso_values[] =
+    {
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24,  8,  2,
+       5, 12, 11,  0, 10,  9,  8,  7, 24, 24,
+      24, 24, 24, 24, 24, 24, 24,  0, 24,  0,
+      24,  5, 24,  0, 24,  7, 24, 24, 24, 24,
+       7, 24,  1,  0,  8, 24, 24,  0, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+      24, 24, 24, 24, 24, 24
+    };
+  return len + asso_values[(unsigned char)str[len - 1]] + asso_values[(unsigned char)str[0]];
+}
+
+struct stringpool_t
+  {
+    char stringpool_str5[sizeof("CP855")];
+    char stringpool_str6[sizeof("EUC-TW")];
+    char stringpool_str7[sizeof("EUC-KR")];
+    char stringpool_str8[sizeof("CP1251")];
+    char stringpool_str9[sizeof("SHIFT_JIS")];
+    char stringpool_str10[sizeof("ISO-8859-5")];
+    char stringpool_str11[sizeof("ISO-8859-15")];
+    char stringpool_str12[sizeof("ISO-8859-1")];
+    char stringpool_str13[sizeof("EUC-JP")];
+    char stringpool_str14[sizeof("KOI8-R")];
+    char stringpool_str15[sizeof("ISO-8859-2")];
+    char stringpool_str16[sizeof("GB2312")];
+    char stringpool_str17[sizeof("ISO-8859-9")];
+    char stringpool_str18[sizeof("ISO-8859-8")];
+    char stringpool_str19[sizeof("ISO-8859-7")];
+    char stringpool_str20[sizeof("ISO-8859-6")];
+    char stringpool_str21[sizeof("ISO-8859-4")];
+    char stringpool_str22[sizeof("ISO-8859-3")];
+    char stringpool_str23[sizeof("TIS-620")];
+  };
+static const struct stringpool_t stringpool_contents =
+  {
+    "CP855",
+    "EUC-TW",
+    "EUC-KR",
+    "CP1251",
+    "SHIFT_JIS",
+    "ISO-8859-5",
+    "ISO-8859-15",
+    "ISO-8859-1",
+    "EUC-JP",
+    "KOI8-R",
+    "ISO-8859-2",
+    "GB2312",
+    "ISO-8859-9",
+    "ISO-8859-8",
+    "ISO-8859-7",
+    "ISO-8859-6",
+    "ISO-8859-4",
+    "ISO-8859-3",
+    "TIS-620"
+  };
+#define stringpool ((const char *) &stringpool_contents)
+
+static const struct mapping mappings[] =
+  {
+    {-1}, {-1}, {-1}, {-1}, {-1},
+#line 40 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str5, "DOS855"},
+#line 45 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str6, "eucTW"},
+#line 44 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str7, "eucKR"},
+#line 41 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str8, "WIN1251"},
+#line 46 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str9, "sjis"},
+#line 33 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str10, "ISO8859-5"},
+#line 38 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str11, "ISO8859-15"},
+#line 29 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str12, "ISO8859-1"},
+#line 43 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str13, "eucJP"},
+#line 39 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str14, "KOI8"},
+#line 30 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str15, "ISO8859-2"},
+#line 42 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str16, "eucCN"},
+#line 37 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str17, "ISO8859-9"},
+#line 36 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str18, "ISO8859-8"},
+#line 35 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str19, "ISO8859-7"},
+#line 34 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str20, "ISO8859-6"},
+#line 32 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str21, "ISO8859-4"},
+#line 31 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str22, "ISO8859-3"},
+#line 47 "./iconv_open-irix.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str23, "TIS620"}
+  };
+
+const struct mapping *
+mapping_lookup (register const char *str, register size_t len)
+{
+  if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)
+    {
+      register unsigned int key = mapping_hash (str, len);
+
+      if (key <= MAX_HASH_VALUE)
+        {
+          register int o = mappings[key].standard_name;
+          if (o >= 0)
+            {
+              register const char *s = o + stringpool;
+
+              if (*str == *s && !strcmp (str + 1, s + 1))
+                return &mappings[key];
+            }
+        }
+    }
+  return 0;
+}
diff --git a/src/grep/lib/iconv_open-osf.gperf b/src/grep/lib/iconv_open-osf.gperf
new file mode 100644
index 0000000..d818d79
--- /dev/null
+++ b/src/grep/lib/iconv_open-osf.gperf
@@ -0,0 +1,66 @@
+/* Character set conversion.
+   Copyright (C) 2007, 2020-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+struct mapping { int standard_name; const char vendor_name[10 + 1]; };
+%struct-type
+%language=ANSI-C
+%define slot-name standard_name
+%define hash-function-name mapping_hash
+%define lookup-function-name mapping_lookup
+%readonly-tables
+%global-table
+%define word-array-name mappings
+%pic
+%%
+# On OSF/1 5.1, look in /usr/lib/nls/loc/iconv.
+ISO-8859-1, "ISO8859-1"
+ISO-8859-2, "ISO8859-2"
+ISO-8859-3, "ISO8859-3"
+ISO-8859-4, "ISO8859-4"
+ISO-8859-5, "ISO8859-5"
+ISO-8859-6, "ISO8859-6"
+ISO-8859-7, "ISO8859-7"
+ISO-8859-8, "ISO8859-8"
+ISO-8859-9, "ISO8859-9"
+ISO-8859-15, "ISO8859-15"
+CP437, "cp437"
+CP775, "cp775"
+CP850, "cp850"
+CP852, "cp852"
+CP855, "cp855"
+CP857, "cp857"
+CP861, "cp861"
+CP862, "cp862"
+CP865, "cp865"
+CP866, "cp866"
+CP869, "cp869"
+CP874, "cp874"
+CP949, "KSC5601"
+CP1250, "cp1250"
+CP1251, "cp1251"
+CP1252, "cp1252"
+CP1253, "cp1253"
+CP1254, "cp1254"
+CP1255, "cp1255"
+CP1256, "cp1256"
+CP1257, "cp1257"
+CP1258, "cp1258"
+EUC-JP, "eucJP"
+EUC-KR, "eucKR"
+EUC-TW, "eucTW"
+BIG5, "big5"
+SHIFT_JIS, "SJIS"
+TIS-620, "TACTIS"
diff --git a/src/grep/lib/iconv_open-osf.h b/src/grep/lib/iconv_open-osf.h
new file mode 100644
index 0000000..cf23c08
--- /dev/null
+++ b/src/grep/lib/iconv_open-osf.h
@@ -0,0 +1,272 @@
+/* ANSI-C code produced by gperf version 3.1 */
+/* Command-line: gperf -m 10 ./iconv_open-osf.gperf  */
+/* Computed positions: -k'4,$' */
+
+#if !((' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
+      && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \
+      && (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \
+      && ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \
+      && ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \
+      && ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \
+      && ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \
+      && ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \
+      && ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \
+      && ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \
+      && ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \
+      && ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \
+      && ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \
+      && ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \
+      && ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \
+      && ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \
+      && ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \
+      && ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \
+      && ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \
+      && ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \
+      && ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \
+      && ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \
+      && ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126))
+/* The character set is not based on ISO-646.  */
+#error "gperf generated tables don't work with this execution character set. Please report a bug to <bug-gperf@gnu.org>."
+#endif
+
+#line 17 "./iconv_open-osf.gperf"
+struct mapping { int standard_name; const char vendor_name[10 + 1]; };
+
+#define TOTAL_KEYWORDS 38
+#define MIN_WORD_LENGTH 4
+#define MAX_WORD_LENGTH 11
+#define MIN_HASH_VALUE 6
+#define MAX_HASH_VALUE 47
+/* maximum key range = 42, duplicates = 0 */
+
+#ifdef __GNUC__
+__inline
+#else
+#ifdef __cplusplus
+inline
+#endif
+#endif
+static unsigned int
+mapping_hash (register const char *str, register size_t len)
+{
+  static const unsigned char asso_values[] =
+    {
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48,  2, 29,
+      24, 34, 31,  0, 15, 14, 10, 13,  2, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48,  7, 48, 48, 48, 48, 48, 48,
+      11, 48,  2,  7, 48, 48, 48,  1, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48, 48,
+      48, 48, 48, 48, 48, 48, 48, 48, 48
+    };
+  return len + asso_values[(unsigned char)str[3]+3] + asso_values[(unsigned char)str[len - 1]];
+}
+
+struct stringpool_t
+  {
+    char stringpool_str6[sizeof("CP1255")];
+    char stringpool_str7[sizeof("CP775")];
+    char stringpool_str8[sizeof("CP1250")];
+    char stringpool_str9[sizeof("EUC-TW")];
+    char stringpool_str10[sizeof("EUC-KR")];
+    char stringpool_str11[sizeof("TIS-620")];
+    char stringpool_str12[sizeof("ISO-8859-5")];
+    char stringpool_str13[sizeof("ISO-8859-15")];
+    char stringpool_str14[sizeof("BIG5")];
+    char stringpool_str15[sizeof("CP855")];
+    char stringpool_str16[sizeof("CP1258")];
+    char stringpool_str17[sizeof("CP850")];
+    char stringpool_str18[sizeof("CP865")];
+    char stringpool_str19[sizeof("EUC-JP")];
+    char stringpool_str20[sizeof("CP1257")];
+    char stringpool_str21[sizeof("CP1256")];
+    char stringpool_str22[sizeof("ISO-8859-8")];
+    char stringpool_str23[sizeof("SHIFT_JIS")];
+    char stringpool_str25[sizeof("ISO-8859-9")];
+    char stringpool_str26[sizeof("ISO-8859-7")];
+    char stringpool_str27[sizeof("ISO-8859-6")];
+    char stringpool_str29[sizeof("CP857")];
+    char stringpool_str30[sizeof("CP1252")];
+    char stringpool_str31[sizeof("CP869")];
+    char stringpool_str32[sizeof("CP949")];
+    char stringpool_str33[sizeof("CP866")];
+    char stringpool_str34[sizeof("CP437")];
+    char stringpool_str35[sizeof("CP1251")];
+    char stringpool_str36[sizeof("ISO-8859-2")];
+    char stringpool_str37[sizeof("CP1254")];
+    char stringpool_str38[sizeof("CP874")];
+    char stringpool_str39[sizeof("CP852")];
+    char stringpool_str40[sizeof("CP1253")];
+    char stringpool_str41[sizeof("ISO-8859-1")];
+    char stringpool_str42[sizeof("CP862")];
+    char stringpool_str43[sizeof("ISO-8859-4")];
+    char stringpool_str46[sizeof("ISO-8859-3")];
+    char stringpool_str47[sizeof("CP861")];
+  };
+static const struct stringpool_t stringpool_contents =
+  {
+    "CP1255",
+    "CP775",
+    "CP1250",
+    "EUC-TW",
+    "EUC-KR",
+    "TIS-620",
+    "ISO-8859-5",
+    "ISO-8859-15",
+    "BIG5",
+    "CP855",
+    "CP1258",
+    "CP850",
+    "CP865",
+    "EUC-JP",
+    "CP1257",
+    "CP1256",
+    "ISO-8859-8",
+    "SHIFT_JIS",
+    "ISO-8859-9",
+    "ISO-8859-7",
+    "ISO-8859-6",
+    "CP857",
+    "CP1252",
+    "CP869",
+    "CP949",
+    "CP866",
+    "CP437",
+    "CP1251",
+    "ISO-8859-2",
+    "CP1254",
+    "CP874",
+    "CP852",
+    "CP1253",
+    "ISO-8859-1",
+    "CP862",
+    "ISO-8859-4",
+    "ISO-8859-3",
+    "CP861"
+  };
+#define stringpool ((const char *) &stringpool_contents)
+
+static const struct mapping mappings[] =
+  {
+    {-1}, {-1}, {-1}, {-1}, {-1}, {-1},
+#line 57 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str6, "cp1255"},
+#line 40 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str7, "cp775"},
+#line 52 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str8, "cp1250"},
+#line 63 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str9, "eucTW"},
+#line 62 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str10, "eucKR"},
+#line 66 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str11, "TACTIS"},
+#line 33 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str12, "ISO8859-5"},
+#line 38 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str13, "ISO8859-15"},
+#line 64 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str14, "big5"},
+#line 43 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str15, "cp855"},
+#line 60 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str16, "cp1258"},
+#line 41 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str17, "cp850"},
+#line 47 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str18, "cp865"},
+#line 61 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str19, "eucJP"},
+#line 59 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str20, "cp1257"},
+#line 58 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str21, "cp1256"},
+#line 36 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str22, "ISO8859-8"},
+#line 65 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str23, "SJIS"},
+    {-1},
+#line 37 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str25, "ISO8859-9"},
+#line 35 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str26, "ISO8859-7"},
+#line 34 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str27, "ISO8859-6"},
+    {-1},
+#line 44 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str29, "cp857"},
+#line 54 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str30, "cp1252"},
+#line 49 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str31, "cp869"},
+#line 51 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str32, "KSC5601"},
+#line 48 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str33, "cp866"},
+#line 39 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str34, "cp437"},
+#line 53 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str35, "cp1251"},
+#line 30 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str36, "ISO8859-2"},
+#line 56 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str37, "cp1254"},
+#line 50 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str38, "cp874"},
+#line 42 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str39, "cp852"},
+#line 55 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str40, "cp1253"},
+#line 29 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str41, "ISO8859-1"},
+#line 46 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str42, "cp862"},
+#line 32 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str43, "ISO8859-4"},
+    {-1}, {-1},
+#line 31 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str46, "ISO8859-3"},
+#line 45 "./iconv_open-osf.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str47, "cp861"}
+  };
+
+const struct mapping *
+mapping_lookup (register const char *str, register size_t len)
+{
+  if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)
+    {
+      register unsigned int key = mapping_hash (str, len);
+
+      if (key <= MAX_HASH_VALUE)
+        {
+          register int o = mappings[key].standard_name;
+          if (o >= 0)
+            {
+              register const char *s = o + stringpool;
+
+              if (*str == *s && !strcmp (str + 1, s + 1))
+                return &mappings[key];
+            }
+        }
+    }
+  return 0;
+}
diff --git a/src/grep/lib/iconv_open-solaris.gperf b/src/grep/lib/iconv_open-solaris.gperf
new file mode 100644
index 0000000..648dd3a
--- /dev/null
+++ b/src/grep/lib/iconv_open-solaris.gperf
@@ -0,0 +1,46 @@
+/* Character set conversion.
+   Copyright (C) 2007, 2009, 2020-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+struct mapping { int standard_name; const char vendor_name[10 + 1]; };
+%struct-type
+%language=ANSI-C
+%define slot-name standard_name
+%define hash-function-name mapping_hash
+%define lookup-function-name mapping_lookup
+%readonly-tables
+%global-table
+%define word-array-name mappings
+%pic
+%%
+# On Solaris 10, look in the "iconv -l" output. Some aliases are advertised but
+# not actually supported by the iconv() function and by the 'iconv' program.
+# For example:
+#   $ echo abc | iconv -f 646 -t ISO-8859-1
+#   Not supported 646 to ISO-8859-1
+#   $ echo abc | iconv -f 646 -t ISO8859-1
+$   abc
+ASCII, "646"
+ISO-8859-1, "ISO8859-1"
+ISO-8859-2, "ISO8859-2"
+ISO-8859-3, "ISO8859-3"
+ISO-8859-4, "ISO8859-4"
+ISO-8859-5, "ISO8859-5"
+ISO-8859-6, "ISO8859-6"
+ISO-8859-7, "ISO8859-7"
+ISO-8859-8, "ISO8859-8"
+ISO-8859-9, "ISO8859-9"
+ISO-8859-15, "ISO8859-15"
+CP1251, "ansi-1251"
diff --git a/src/grep/lib/iconv_open-solaris.h b/src/grep/lib/iconv_open-solaris.h
new file mode 100644
index 0000000..b38b16c
--- /dev/null
+++ b/src/grep/lib/iconv_open-solaris.h
@@ -0,0 +1,184 @@
+/* ANSI-C code produced by gperf version 3.1 */
+/* Command-line: gperf -m 10 ./iconv_open-solaris.gperf  */
+/* Computed positions: -k'10' */
+
+#if !((' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
+      && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \
+      && (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \
+      && ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \
+      && ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \
+      && ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \
+      && ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \
+      && ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \
+      && ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \
+      && ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \
+      && ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \
+      && ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \
+      && ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \
+      && ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \
+      && ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \
+      && ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \
+      && ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \
+      && ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \
+      && ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \
+      && ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \
+      && ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \
+      && ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \
+      && ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126))
+/* The character set is not based on ISO-646.  */
+#error "gperf generated tables don't work with this execution character set. Please report a bug to <bug-gperf@gnu.org>."
+#endif
+
+#line 17 "./iconv_open-solaris.gperf"
+struct mapping { int standard_name; const char vendor_name[10 + 1]; };
+
+#define TOTAL_KEYWORDS 13
+#define MIN_WORD_LENGTH 5
+#define MAX_WORD_LENGTH 11
+#define MIN_HASH_VALUE 5
+#define MAX_HASH_VALUE 19
+/* maximum key range = 15, duplicates = 0 */
+
+#ifdef __GNUC__
+__inline
+#else
+#ifdef __cplusplus
+inline
+#endif
+#endif
+static unsigned int
+mapping_hash (register const char *str, register size_t len)
+{
+  static const unsigned char asso_values[] =
+    {
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20,  0,
+       9,  8,  7,  6,  5,  4,  3,  2, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+      20, 20, 20, 20, 20, 20
+    };
+  register unsigned int hval = len;
+
+  switch (hval)
+    {
+      default:
+        hval += asso_values[(unsigned char)str[9]];
+      /*FALLTHROUGH*/
+      case 9:
+      case 8:
+      case 7:
+      case 6:
+      case 5:
+        break;
+    }
+  return hval;
+}
+
+struct stringpool_t
+  {
+    char stringpool_str5[sizeof("ASCII")];
+    char stringpool_str6[sizeof("CP1251")];
+    char stringpool_str7[sizeof("$   abc")];
+    char stringpool_str10[sizeof("ISO-8859-1")];
+    char stringpool_str11[sizeof("ISO-8859-15")];
+    char stringpool_str12[sizeof("ISO-8859-9")];
+    char stringpool_str13[sizeof("ISO-8859-8")];
+    char stringpool_str14[sizeof("ISO-8859-7")];
+    char stringpool_str15[sizeof("ISO-8859-6")];
+    char stringpool_str16[sizeof("ISO-8859-5")];
+    char stringpool_str17[sizeof("ISO-8859-4")];
+    char stringpool_str18[sizeof("ISO-8859-3")];
+    char stringpool_str19[sizeof("ISO-8859-2")];
+  };
+static const struct stringpool_t stringpool_contents =
+  {
+    "ASCII",
+    "CP1251",
+    "$   abc",
+    "ISO-8859-1",
+    "ISO-8859-15",
+    "ISO-8859-9",
+    "ISO-8859-8",
+    "ISO-8859-7",
+    "ISO-8859-6",
+    "ISO-8859-5",
+    "ISO-8859-4",
+    "ISO-8859-3",
+    "ISO-8859-2"
+  };
+#define stringpool ((const char *) &stringpool_contents)
+
+static const struct mapping mappings[] =
+  {
+    {-1}, {-1}, {-1}, {-1}, {-1},
+#line 35 "./iconv_open-solaris.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str5, "646"},
+#line 46 "./iconv_open-solaris.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str6, "ansi-1251"},
+#line 34 "./iconv_open-solaris.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str7},
+    {-1}, {-1},
+#line 36 "./iconv_open-solaris.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str10, "ISO8859-1"},
+#line 45 "./iconv_open-solaris.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str11, "ISO8859-15"},
+#line 44 "./iconv_open-solaris.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str12, "ISO8859-9"},
+#line 43 "./iconv_open-solaris.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str13, "ISO8859-8"},
+#line 42 "./iconv_open-solaris.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str14, "ISO8859-7"},
+#line 41 "./iconv_open-solaris.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str15, "ISO8859-6"},
+#line 40 "./iconv_open-solaris.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str16, "ISO8859-5"},
+#line 39 "./iconv_open-solaris.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str17, "ISO8859-4"},
+#line 38 "./iconv_open-solaris.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str18, "ISO8859-3"},
+#line 37 "./iconv_open-solaris.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str19, "ISO8859-2"}
+  };
+
+const struct mapping *
+mapping_lookup (register const char *str, register size_t len)
+{
+  if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)
+    {
+      register unsigned int key = mapping_hash (str, len);
+
+      if (key <= MAX_HASH_VALUE)
+        {
+          register int o = mappings[key].standard_name;
+          if (o >= 0)
+            {
+              register const char *s = o + stringpool;
+
+              if (*str == *s && !strcmp (str + 1, s + 1))
+                return &mappings[key];
+            }
+        }
+    }
+  return 0;
+}
diff --git a/src/grep/lib/iconv_open-zos.gperf b/src/grep/lib/iconv_open-zos.gperf
new file mode 100644
index 0000000..1c3552e
--- /dev/null
+++ b/src/grep/lib/iconv_open-zos.gperf
@@ -0,0 +1,76 @@
+/* Character set conversion.
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+struct mapping { int standard_name; const char vendor_name[10 + 1]; };
+%struct-type
+%language=ANSI-C
+%define slot-name standard_name
+%define hash-function-name mapping_hash
+%define lookup-function-name mapping_lookup
+%readonly-tables
+%global-table
+%define word-array-name mappings
+%pic
+%%
+ASCII, "00367"
+ISO-8859-1, "ISO8859-1"
+ISO-8859-2, "ISO8859-2"
+ISO-8859-3, "00913"
+ISO-8859-4, "ISO8859-4"
+ISO-8859-5, "ISO8859-5"
+ISO-8859-6, "ISO8859-6"
+ISO-8859-7, "ISO8859-7"
+ISO-8859-8, "05012"
+ISO-8859-9, "ISO8859-9"
+ISO-8859-13, "ISO8859-13"
+ISO-8859-15, "ISO8859-15"
+KOI8-R, "00878"
+KOI8-U, "01168"
+CP437, "IBM-437"
+CP775, "00775"
+CP850, "09042"
+CP852, "IBM-852"
+CP855, "13143"
+CP856, "IBM-856"
+CP857, "00857"
+CP861, "IBM-861"
+CP862, "IBM-862"
+CP864, "IBM-864"
+CP865, "00865"
+CP866, "04962"
+CP869, "IBM-869"
+CP874, "TIS-620"
+CP922, "IBM-922"
+CP932, "IBM-943"
+CP943, "IBM-943"
+CP949, "IBM-1363"
+CP1046, "IBM-1046"
+CP1124, "IBM-1124"
+CP1125, "IBM-1125"
+CP1129, "01129"
+CP1131, "01131"
+CP1250, "IBM-5346"
+CP1251, "IBM-5347"
+CP1252, "IBM-5348"
+CP1253, "IBM-5349"
+CP1254, "IBM-5350"
+CP1255, "09447"
+CP1256, "09448"
+CP1257, "09449"
+GB2312, "IBM-eucCN"
+EUC-JP, "01350"
+EUC-KR, "IBM-eucKR"
+GBK, "IBM-1386"
diff --git a/src/grep/lib/iconv_open-zos.h b/src/grep/lib/iconv_open-zos.h
new file mode 100644
index 0000000..5f84725
--- /dev/null
+++ b/src/grep/lib/iconv_open-zos.h
@@ -0,0 +1,329 @@
+/* ANSI-C code produced by gperf version 3.1 */
+/* Command-line: gperf -m 10 ./iconv_open-zos.gperf  */
+/* Computed positions: -k'4,$' */
+
+#if !((' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
+      && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \
+      && (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \
+      && ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \
+      && ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \
+      && ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \
+      && ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \
+      && ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \
+      && ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \
+      && ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \
+      && ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \
+      && ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \
+      && ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \
+      && ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \
+      && ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \
+      && ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \
+      && ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \
+      && ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \
+      && ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \
+      && ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \
+      && ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \
+      && ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \
+      && ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126))
+/* The character set is not based on ISO-646.  */
+#error "gperf generated tables don't work with this execution character set. Please report a bug to <bug-gperf@gnu.org>."
+#endif
+
+#line 17 "./iconv_open-zos.gperf"
+struct mapping { int standard_name; const char vendor_name[10 + 1]; };
+
+#define TOTAL_KEYWORDS 49
+#define MIN_WORD_LENGTH 3
+#define MAX_WORD_LENGTH 11
+#define MIN_HASH_VALUE 3
+#define MAX_HASH_VALUE 64
+/* maximum key range = 62, duplicates = 0 */
+
+#ifdef __GNUC__
+__inline
+#else
+#ifdef __cplusplus
+inline
+#endif
+#endif
+static unsigned int
+mapping_hash (register const char *str, register size_t len)
+{
+  static const unsigned char asso_values[] =
+    {
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 16, 38,
+      14,  1, 32, 22, 29,  3,  0,  7, 40,  2,
+       5, 18, 23, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65,  0, 65,  0, 65, 65, 65,  0,
+      43, 65,  1, 65, 65,  8, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
+      65, 65
+    };
+  register unsigned int hval = len;
+
+  switch (hval)
+    {
+      default:
+        hval += asso_values[(unsigned char)str[3]+6];
+      /*FALLTHROUGH*/
+      case 3:
+        break;
+    }
+  return hval + asso_values[(unsigned char)str[len - 1]];
+}
+
+struct stringpool_t
+  {
+    char stringpool_str3[sizeof("GBK")];
+    char stringpool_str5[sizeof("ASCII")];
+    char stringpool_str7[sizeof("CP1253")];
+    char stringpool_str8[sizeof("EUC-KR")];
+    char stringpool_str9[sizeof("CP1257")];
+    char stringpool_str10[sizeof("CP857")];
+    char stringpool_str11[sizeof("ISO-8859-8")];
+    char stringpool_str12[sizeof("ISO-8859-3")];
+    char stringpool_str13[sizeof("ISO-8859-13")];
+    char stringpool_str14[sizeof("ISO-8859-7")];
+    char stringpool_str15[sizeof("CP437")];
+    char stringpool_str16[sizeof("CP1129")];
+    char stringpool_str17[sizeof("CP869")];
+    char stringpool_str18[sizeof("ISO-8859-9")];
+    char stringpool_str19[sizeof("CP922")];
+    char stringpool_str20[sizeof("CP1252")];
+    char stringpool_str21[sizeof("CP852")];
+    char stringpool_str22[sizeof("CP1250")];
+    char stringpool_str23[sizeof("CP850")];
+    char stringpool_str24[sizeof("CP862")];
+    char stringpool_str25[sizeof("ISO-8859-2")];
+    char stringpool_str26[sizeof("CP932")];
+    char stringpool_str27[sizeof("GB2312")];
+    char stringpool_str28[sizeof("CP1255")];
+    char stringpool_str29[sizeof("CP855")];
+    char stringpool_str30[sizeof("KOI8-R")];
+    char stringpool_str31[sizeof("CP1125")];
+    char stringpool_str32[sizeof("CP865")];
+    char stringpool_str33[sizeof("ISO-8859-5")];
+    char stringpool_str34[sizeof("ISO-8859-15")];
+    char stringpool_str35[sizeof("CP1256")];
+    char stringpool_str36[sizeof("CP856")];
+    char stringpool_str37[sizeof("KOI8-U")];
+    char stringpool_str38[sizeof("CP1254")];
+    char stringpool_str39[sizeof("CP866")];
+    char stringpool_str40[sizeof("ISO-8859-6")];
+    char stringpool_str41[sizeof("CP1124")];
+    char stringpool_str42[sizeof("CP864")];
+    char stringpool_str43[sizeof("ISO-8859-4")];
+    char stringpool_str44[sizeof("CP1251")];
+    char stringpool_str45[sizeof("CP775")];
+    char stringpool_str46[sizeof("CP943")];
+    char stringpool_str47[sizeof("CP1131")];
+    char stringpool_str48[sizeof("CP861")];
+    char stringpool_str49[sizeof("ISO-8859-1")];
+    char stringpool_str50[sizeof("EUC-JP")];
+    char stringpool_str52[sizeof("CP949")];
+    char stringpool_str55[sizeof("CP874")];
+    char stringpool_str64[sizeof("CP1046")];
+  };
+static const struct stringpool_t stringpool_contents =
+  {
+    "GBK",
+    "ASCII",
+    "CP1253",
+    "EUC-KR",
+    "CP1257",
+    "CP857",
+    "ISO-8859-8",
+    "ISO-8859-3",
+    "ISO-8859-13",
+    "ISO-8859-7",
+    "CP437",
+    "CP1129",
+    "CP869",
+    "ISO-8859-9",
+    "CP922",
+    "CP1252",
+    "CP852",
+    "CP1250",
+    "CP850",
+    "CP862",
+    "ISO-8859-2",
+    "CP932",
+    "GB2312",
+    "CP1255",
+    "CP855",
+    "KOI8-R",
+    "CP1125",
+    "CP865",
+    "ISO-8859-5",
+    "ISO-8859-15",
+    "CP1256",
+    "CP856",
+    "KOI8-U",
+    "CP1254",
+    "CP866",
+    "ISO-8859-6",
+    "CP1124",
+    "CP864",
+    "ISO-8859-4",
+    "CP1251",
+    "CP775",
+    "CP943",
+    "CP1131",
+    "CP861",
+    "ISO-8859-1",
+    "EUC-JP",
+    "CP949",
+    "CP874",
+    "CP1046"
+  };
+#define stringpool ((const char *) &stringpool_contents)
+
+static const struct mapping mappings[] =
+  {
+    {-1}, {-1}, {-1},
+#line 76 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str3, "IBM-1386"},
+    {-1},
+#line 28 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str5, "00367"},
+    {-1},
+#line 68 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str7, "IBM-5349"},
+#line 75 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str8, "IBM-eucKR"},
+#line 72 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str9, "09449"},
+#line 48 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str10, "00857"},
+#line 36 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str11, "05012"},
+#line 31 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str12, "00913"},
+#line 38 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str13, "ISO8859-13"},
+#line 35 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str14, "ISO8859-7"},
+#line 42 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str15, "IBM-437"},
+#line 63 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str16, "01129"},
+#line 54 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str17, "IBM-869"},
+#line 37 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str18, "ISO8859-9"},
+#line 56 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str19, "IBM-922"},
+#line 67 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str20, "IBM-5348"},
+#line 45 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str21, "IBM-852"},
+#line 65 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str22, "IBM-5346"},
+#line 44 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str23, "09042"},
+#line 50 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str24, "IBM-862"},
+#line 30 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str25, "ISO8859-2"},
+#line 57 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str26, "IBM-943"},
+#line 73 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str27, "IBM-eucCN"},
+#line 70 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str28, "09447"},
+#line 46 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str29, "13143"},
+#line 40 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str30, "00878"},
+#line 62 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str31, "IBM-1125"},
+#line 52 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str32, "00865"},
+#line 33 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str33, "ISO8859-5"},
+#line 39 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str34, "ISO8859-15"},
+#line 71 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str35, "09448"},
+#line 47 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str36, "IBM-856"},
+#line 41 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str37, "01168"},
+#line 69 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str38, "IBM-5350"},
+#line 53 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str39, "04962"},
+#line 34 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str40, "ISO8859-6"},
+#line 61 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str41, "IBM-1124"},
+#line 51 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str42, "IBM-864"},
+#line 32 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str43, "ISO8859-4"},
+#line 66 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str44, "IBM-5347"},
+#line 43 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str45, "00775"},
+#line 58 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str46, "IBM-943"},
+#line 64 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str47, "01131"},
+#line 49 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str48, "IBM-861"},
+#line 29 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str49, "ISO8859-1"},
+#line 74 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str50, "01350"},
+    {-1},
+#line 59 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str52, "IBM-1363"},
+    {-1}, {-1},
+#line 55 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str55, "TIS-620"},
+    {-1}, {-1}, {-1}, {-1}, {-1}, {-1}, {-1}, {-1},
+#line 60 "./iconv_open-zos.gperf"
+    {(int)(size_t)&((struct stringpool_t *)0)->stringpool_str64, "IBM-1046"}
+  };
+
+const struct mapping *
+mapping_lookup (register const char *str, register size_t len)
+{
+  if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)
+    {
+      register unsigned int key = mapping_hash (str, len);
+
+      if (key <= MAX_HASH_VALUE)
+        {
+          register int o = mappings[key].standard_name;
+          if (o >= 0)
+            {
+              register const char *s = o + stringpool;
+
+              if (*str == *s && !strcmp (str + 1, s + 1))
+                return &mappings[key];
+            }
+        }
+    }
+  return 0;
+}
diff --git a/src/grep/lib/iconv_open.c b/src/grep/lib/iconv_open.c
new file mode 100644
index 0000000..e573556
--- /dev/null
+++ b/src/grep/lib/iconv_open.c
@@ -0,0 +1,173 @@
+/* Character set conversion.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <iconv.h>
+
+#include <errno.h>
+#include <string.h>
+#include "c-ctype.h"
+#include "c-strcase.h"
+
+#define SIZEOF(a) (sizeof(a) / sizeof(a[0]))
+
+/* Namespace cleanliness.  */
+#define mapping_lookup rpl_iconv_open_mapping_lookup
+
+/* The macro ICONV_FLAVOR is defined to one of these or undefined.  */
+
+#define ICONV_FLAVOR_AIX "iconv_open-aix.h"
+#define ICONV_FLAVOR_HPUX "iconv_open-hpux.h"
+#define ICONV_FLAVOR_IRIX "iconv_open-irix.h"
+#define ICONV_FLAVOR_OSF "iconv_open-osf.h"
+#define ICONV_FLAVOR_SOLARIS "iconv_open-solaris.h"
+#define ICONV_FLAVOR_ZOS "iconv_open-zos.h"
+
+#ifdef ICONV_FLAVOR
+# include ICONV_FLAVOR
+#endif
+
+iconv_t
+rpl_iconv_open (const char *tocode, const char *fromcode)
+#undef iconv_open
+{
+  char fromcode_upper[32];
+  char tocode_upper[32];
+  char *fromcode_upper_end;
+  char *tocode_upper_end;
+
+#if REPLACE_ICONV_UTF
+  /* Special handling of conversion between UTF-8 and UTF-{16,32}{BE,LE}.
+     Do this here, before calling the real iconv_open(), because  OSF/1 5.1
+     iconv() to these encoding inserts a BOM, which is wrong.
+     We do not need to handle conversion between arbitrary encodings and
+     UTF-{16,32}{BE,LE}, because the 'striconveh' module implements two-step
+     conversion through UTF-8.
+     The _ICONV_* constants are chosen to be disjoint from any iconv_t
+     returned by the system's iconv_open() functions.  Recall that iconv_t
+     is a scalar type.  */
+  if (c_toupper (fromcode[0]) == 'U'
+      && c_toupper (fromcode[1]) == 'T'
+      && c_toupper (fromcode[2]) == 'F'
+      && fromcode[3] == '-')
+    {
+      if (c_toupper (tocode[0]) == 'U'
+          && c_toupper (tocode[1]) == 'T'
+          && c_toupper (tocode[2]) == 'F'
+          && tocode[3] == '-')
+        {
+          if (strcmp (fromcode + 4, "8") == 0)
+            {
+              if (c_strcasecmp (tocode + 4, "16BE") == 0)
+                return _ICONV_UTF8_UTF16BE;
+              if (c_strcasecmp (tocode + 4, "16LE") == 0)
+                return _ICONV_UTF8_UTF16LE;
+              if (c_strcasecmp (tocode + 4, "32BE") == 0)
+                return _ICONV_UTF8_UTF32BE;
+              if (c_strcasecmp (tocode + 4, "32LE") == 0)
+                return _ICONV_UTF8_UTF32LE;
+            }
+          else if (strcmp (tocode + 4, "8") == 0)
+            {
+              if (c_strcasecmp (fromcode + 4, "16BE") == 0)
+                return _ICONV_UTF16BE_UTF8;
+              if (c_strcasecmp (fromcode + 4, "16LE") == 0)
+                return _ICONV_UTF16LE_UTF8;
+              if (c_strcasecmp (fromcode + 4, "32BE") == 0)
+                return _ICONV_UTF32BE_UTF8;
+              if (c_strcasecmp (fromcode + 4, "32LE") == 0)
+                return _ICONV_UTF32LE_UTF8;
+            }
+        }
+    }
+#endif
+
+  /* Do *not* add special support for 8-bit encodings like ASCII or ISO-8859-1
+     here.  This would lead to programs that work in some locales (such as the
+     "C" or "en_US" locales) but do not work in East Asian locales.  It is
+     better if programmers make their programs depend on GNU libiconv (except
+     on glibc systems), e.g. by using the AM_ICONV macro and documenting the
+     dependency in an INSTALL or DEPENDENCIES file.  */
+
+  /* Try with the original names first.
+     This covers the case when fromcode or tocode is a lowercase encoding name
+     that is understood by the system's iconv_open but not listed in our
+     mappings table.  */
+  {
+    iconv_t cd = iconv_open (tocode, fromcode);
+    if (cd != (iconv_t)(-1))
+      return cd;
+  }
+
+  /* Convert the encodings to upper case, because
+       1. in the arguments of iconv_open() on AIX, HP-UX, and OSF/1 the case
+          matters,
+       2. it makes searching in the table faster.  */
+  {
+    const char *p = fromcode;
+    char *q = fromcode_upper;
+    while ((*q = c_toupper (*p)) != '\0')
+      {
+        p++;
+        q++;
+        if (q == &fromcode_upper[SIZEOF (fromcode_upper)])
+          {
+            errno = EINVAL;
+            return (iconv_t)(-1);
+          }
+      }
+    fromcode_upper_end = q;
+  }
+
+  {
+    const char *p = tocode;
+    char *q = tocode_upper;
+    while ((*q = c_toupper (*p)) != '\0')
+      {
+        p++;
+        q++;
+        if (q == &tocode_upper[SIZEOF (tocode_upper)])
+          {
+            errno = EINVAL;
+            return (iconv_t)(-1);
+          }
+      }
+    tocode_upper_end = q;
+  }
+
+#ifdef ICONV_FLAVOR
+  /* Apply the mappings.  */
+  {
+    const struct mapping *m =
+      mapping_lookup (fromcode_upper, fromcode_upper_end - fromcode_upper);
+
+    fromcode = (m != NULL ? m->vendor_name : fromcode_upper);
+  }
+  {
+    const struct mapping *m =
+      mapping_lookup (tocode_upper, tocode_upper_end - tocode_upper);
+
+    tocode = (m != NULL ? m->vendor_name : tocode_upper);
+  }
+#else
+  fromcode = fromcode_upper;
+  tocode = tocode_upper;
+#endif
+
+  return iconv_open (tocode, fromcode);
+}
diff --git a/src/grep/lib/idx.h b/src/grep/lib/idx.h
new file mode 100644
index 0000000..483587e
--- /dev/null
+++ b/src/grep/lib/idx.h
@@ -0,0 +1,114 @@
+/* A type for indices and sizes.
+   Copyright (C) 2020-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _IDX_H
+#define _IDX_H
+
+/* Get ptrdiff_t.  */
+#include <stddef.h>
+
+/* Get PTRDIFF_MAX.  */
+#include <stdint.h>
+
+/* The type 'idx_t' holds an (array) index or an (object) size.
+   Its implementation promotes to a signed integer type,
+   which can hold the values
+     0..2^63-1 (on 64-bit platforms) or
+     0..2^31-1 (on 32-bit platforms).
+
+   Why a signed integer type?
+
+     * Security: Signed types can be checked for overflow via
+       '-fsanitize=undefined', but unsigned types cannot.
+
+     * Comparisons without surprises: ISO C99 § 6.3.1.8 specifies a few
+       surprising results for comparisons, such as
+
+           (int) -3 < (unsigned long) 7  =>  false
+           (int) -3 < (unsigned int) 7   =>  false
+       and on 32-bit machines:
+           (long) -3 < (unsigned int) 7  =>  false
+
+       This is surprising because the natural comparison order is by
+       value in the realm of infinite-precision signed integers (ℤ).
+
+       The best way to get rid of such surprises is to use signed types
+       for numerical integer values, and use unsigned types only for
+       bit masks and enums.
+
+   Why not use 'size_t' directly?
+
+     * Because 'size_t' is an unsigned type, and a signed type is better.
+       See above.
+
+   Why not use 'ptrdiff_t' directly?
+
+     * Maintainability: When reading and modifying code, it helps to know that
+       a certain variable cannot have negative values.  For example, when you
+       have a loop
+
+         int n = ...;
+         for (int i = 0; i < n; i++) ...
+
+       or
+
+         ptrdiff_t n = ...;
+         for (ptrdiff_t i = 0; i < n; i++) ...
+
+       you have to ask yourself "what if n < 0?".  Whereas in
+
+         idx_t n = ...;
+         for (idx_t i = 0; i < n; i++) ...
+
+       you know that this case cannot happen.
+
+       Similarly, when a programmer writes
+
+         idx_t = ptr2 - ptr1;
+
+       there is an implied assertion that ptr1 and ptr2 point into the same
+       object and that ptr1 <= ptr2.
+
+     * Being future-proof: In the future, range types (integers which are
+       constrained to a certain range of values) may be added to C compilers
+       or to the C standard.  Several programming languages (Ada, Haskell,
+       Common Lisp, Pascal) already have range types.  Such range types may
+       help producing good code and good warnings.  The type 'idx_t' could
+       then be typedef'ed to a range type that is signed after promotion.  */
+
+/* In the future, idx_t could be typedef'ed to a signed range type.
+   The clang "extended integer types", supported in Clang 11 or newer
+   <https://clang.llvm.org/docs/LanguageExtensions.html#extended-integer-types>,
+   are a special case of range types.  However, these types don't support binary
+   operators with plain integer types (e.g. expressions such as x > 1).
+   Therefore, they don't behave like signed types (and not like unsigned types
+   either).  So, we cannot use them here.  */
+
+/* Use the signed type 'ptrdiff_t'.  */
+/* Note: ISO C does not mandate that 'size_t' and 'ptrdiff_t' have the same
+   size, but it is so on all platforms we have seen since 1990.  */
+typedef ptrdiff_t idx_t;
+
+/* IDX_MAX is the maximum value of an idx_t.  */
+#define IDX_MAX PTRDIFF_MAX
+
+/* So far no need has been found for an IDX_WIDTH macro.
+   Perhaps there should be another macro IDX_VALUE_BITS that does not
+   count the sign bit and is therefore one less than PTRDIFF_WIDTH.  */
+
+#endif /* _IDX_H */
diff --git a/src/grep/lib/ignore-value.h b/src/grep/lib/ignore-value.h
new file mode 100644
index 0000000..6099aba
--- /dev/null
+++ b/src/grep/lib/ignore-value.h
@@ -0,0 +1,51 @@
+/* ignore a function return without a compiler warning.  -*- coding: utf-8 -*-
+
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering, Eric Blake and Pádraig Brady.  */
+
+/* Use "ignore_value" to avoid a warning when using a function declared with
+   gcc's warn_unused_result attribute, but for which you really do want to
+   ignore the result.  Traditionally, people have used a "(void)" cast to
+   indicate that a function's return value is deliberately unused.  However,
+   if the function is declared with __attribute__((warn_unused_result)),
+   gcc issues a warning even with the cast.
+
+   Caution: most of the time, you really should heed gcc's warning, and
+   check the return value.  However, in those exceptional cases in which
+   you're sure you know what you're doing, use this function.
+
+   For the record, here's one of the ignorable warnings:
+   "copy.c:233: warning: ignoring return value of 'fchown',
+   declared with attribute warn_unused_result".  */
+
+#ifndef _GL_IGNORE_VALUE_H
+#define _GL_IGNORE_VALUE_H
+
+/* Normally casting an expression to void discards its value, but GCC
+   versions 3.4 and newer have __attribute__ ((__warn_unused_result__))
+   which may cause unwanted diagnostics in that case.  Use __typeof__
+   and __extension__ to work around the problem, if the workaround is
+   known to be needed.
+   The workaround is not needed with clang.  */
+#if (3 < __GNUC__ + (4 <= __GNUC_MINOR__)) && !defined __clang__
+# define ignore_value(x) \
+    (__extension__ ({ __typeof__ (x) __x = (x); (void) __x; }))
+#else
+# define ignore_value(x) ((void) (x))
+#endif
+
+#endif
diff --git a/src/grep/lib/intprops.h b/src/grep/lib/intprops.h
new file mode 100644
index 0000000..9d10028
--- /dev/null
+++ b/src/grep/lib/intprops.h
@@ -0,0 +1,640 @@
+/* intprops.h -- properties of integer types
+
+   Copyright (C) 2001-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as published
+   by the Free Software Foundation; either version 2.1 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+#ifndef _GL_INTPROPS_H
+#define _GL_INTPROPS_H
+
+#include <limits.h>
+
+/* Return a value with the common real type of E and V and the value of V.
+   Do not evaluate E.  */
+#define _GL_INT_CONVERT(e, v) ((1 ? 0 : (e)) + (v))
+
+/* Act like _GL_INT_CONVERT (E, -V) but work around a bug in IRIX 6.5 cc; see
+   <https://lists.gnu.org/r/bug-gnulib/2011-05/msg00406.html>.  */
+#define _GL_INT_NEGATE_CONVERT(e, v) ((1 ? 0 : (e)) - (v))
+
+/* The extra casts in the following macros work around compiler bugs,
+   e.g., in Cray C 5.0.3.0.  */
+
+/* True if the arithmetic type T is an integer type.  bool counts as
+   an integer.  */
+#define TYPE_IS_INTEGER(t) ((t) 1.5 == 1)
+
+/* True if the real type T is signed.  */
+#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
+
+/* Return 1 if the real expression E, after promotion, has a
+   signed or floating type.  Do not evaluate E.  */
+#define EXPR_SIGNED(e) (_GL_INT_NEGATE_CONVERT (e, 1) < 0)
+
+
+/* Minimum and maximum values for integer types and expressions.  */
+
+/* The width in bits of the integer type or expression T.
+   Do not evaluate T.  T must not be a bit-field expression.
+   Padding bits are not supported; this is checked at compile-time below.  */
+#define TYPE_WIDTH(t) (sizeof (t) * CHAR_BIT)
+
+/* The maximum and minimum values for the integer type T.  */
+#define TYPE_MINIMUM(t) ((t) ~ TYPE_MAXIMUM (t))
+#define TYPE_MAXIMUM(t)                                                 \
+  ((t) (! TYPE_SIGNED (t)                                               \
+        ? (t) -1                                                        \
+        : ((((t) 1 << (TYPE_WIDTH (t) - 2)) - 1) * 2 + 1)))
+
+/* The maximum and minimum values for the type of the expression E,
+   after integer promotion.  E is not evaluated.  */
+#define _GL_INT_MINIMUM(e)                                              \
+  (EXPR_SIGNED (e)                                                      \
+   ? ~ _GL_SIGNED_INT_MAXIMUM (e)                                       \
+   : _GL_INT_CONVERT (e, 0))
+#define _GL_INT_MAXIMUM(e)                                              \
+  (EXPR_SIGNED (e)                                                      \
+   ? _GL_SIGNED_INT_MAXIMUM (e)                                         \
+   : _GL_INT_NEGATE_CONVERT (e, 1))
+#define _GL_SIGNED_INT_MAXIMUM(e)                                       \
+  (((_GL_INT_CONVERT (e, 1) << (TYPE_WIDTH (+ (e)) - 2)) - 1) * 2 + 1)
+
+/* Work around OpenVMS incompatibility with C99.  */
+#if !defined LLONG_MAX && defined __INT64_MAX
+# define LLONG_MAX __INT64_MAX
+# define LLONG_MIN __INT64_MIN
+#endif
+
+/* This include file assumes that signed types are two's complement without
+   padding bits; the above macros have undefined behavior otherwise.
+   If this is a problem for you, please let us know how to fix it for your host.
+   This assumption is tested by the intprops-tests module.  */
+
+/* Does the __typeof__ keyword work?  This could be done by
+   'configure', but for now it's easier to do it by hand.  */
+#if (2 <= __GNUC__ \
+     || (4 <= __clang_major__) \
+     || (1210 <= __IBMC__ && defined __IBM__TYPEOF__) \
+     || (0x5110 <= __SUNPRO_C && !__STDC__))
+# define _GL_HAVE___TYPEOF__ 1
+#else
+# define _GL_HAVE___TYPEOF__ 0
+#endif
+
+/* Return 1 if the integer type or expression T might be signed.  Return 0
+   if it is definitely unsigned.  T must not be a bit-field expression.
+   This macro does not evaluate its argument, and expands to an
+   integer constant expression.  */
+#if _GL_HAVE___TYPEOF__
+# define _GL_SIGNED_TYPE_OR_EXPR(t) TYPE_SIGNED (__typeof__ (t))
+#else
+# define _GL_SIGNED_TYPE_OR_EXPR(t) 1
+#endif
+
+/* Bound on length of the string representing an unsigned integer
+   value representable in B bits.  log10 (2.0) < 146/485.  The
+   smallest value of B where this bound is not tight is 2621.  */
+#define INT_BITS_STRLEN_BOUND(b) (((b) * 146 + 484) / 485)
+
+/* Bound on length of the string representing an integer type or expression T.
+   T must not be a bit-field expression.
+
+   Subtract 1 for the sign bit if T is signed, and then add 1 more for
+   a minus sign if needed.
+
+   Because _GL_SIGNED_TYPE_OR_EXPR sometimes returns 1 when its argument is
+   unsigned, this macro may overestimate the true bound by one byte when
+   applied to unsigned types of size 2, 4, 16, ... bytes.  */
+#define INT_STRLEN_BOUND(t)                                     \
+  (INT_BITS_STRLEN_BOUND (TYPE_WIDTH (t) - _GL_SIGNED_TYPE_OR_EXPR (t)) \
+   + _GL_SIGNED_TYPE_OR_EXPR (t))
+
+/* Bound on buffer size needed to represent an integer type or expression T,
+   including the terminating null.  T must not be a bit-field expression.  */
+#define INT_BUFSIZE_BOUND(t) (INT_STRLEN_BOUND (t) + 1)
+
+
+/* Range overflow checks.
+
+   The INT_<op>_RANGE_OVERFLOW macros return 1 if the corresponding C
+   operators might not yield numerically correct answers due to
+   arithmetic overflow.  They do not rely on undefined or
+   implementation-defined behavior.  Their implementations are simple
+   and straightforward, but they are harder to use and may be less
+   efficient than the INT_<op>_WRAPV, INT_<op>_OK, and
+   INT_<op>_OVERFLOW macros described below.
+
+   Example usage:
+
+     long int i = ...;
+     long int j = ...;
+     if (INT_MULTIPLY_RANGE_OVERFLOW (i, j, LONG_MIN, LONG_MAX))
+       printf ("multiply would overflow");
+     else
+       printf ("product is %ld", i * j);
+
+   Restrictions on *_RANGE_OVERFLOW macros:
+
+   These macros do not check for all possible numerical problems or
+   undefined or unspecified behavior: they do not check for division
+   by zero, for bad shift counts, or for shifting negative numbers.
+
+   These macros may evaluate their arguments zero or multiple times,
+   so the arguments should not have side effects.  The arithmetic
+   arguments (including the MIN and MAX arguments) must be of the same
+   integer type after the usual arithmetic conversions, and the type
+   must have minimum value MIN and maximum MAX.  Unsigned types should
+   use a zero MIN of the proper type.
+
+   Because all arguments are subject to integer promotions, these
+   macros typically do not work on types narrower than 'int'.
+
+   These macros are tuned for constant MIN and MAX.  For commutative
+   operations such as A + B, they are also tuned for constant B.  */
+
+/* Return 1 if A + B would overflow in [MIN,MAX] arithmetic.
+   See above for restrictions.  */
+#define INT_ADD_RANGE_OVERFLOW(a, b, min, max)          \
+  ((b) < 0                                              \
+   ? (a) < (min) - (b)                                  \
+   : (max) - (b) < (a))
+
+/* Return 1 if A - B would overflow in [MIN,MAX] arithmetic.
+   See above for restrictions.  */
+#define INT_SUBTRACT_RANGE_OVERFLOW(a, b, min, max)     \
+  ((b) < 0                                              \
+   ? (max) + (b) < (a)                                  \
+   : (a) < (min) + (b))
+
+/* Return 1 if - A would overflow in [MIN,MAX] arithmetic.
+   See above for restrictions.  */
+#define INT_NEGATE_RANGE_OVERFLOW(a, min, max)          \
+  ((min) < 0                                            \
+   ? (a) < - (max)                                      \
+   : 0 < (a))
+
+/* Return 1 if A * B would overflow in [MIN,MAX] arithmetic.
+   See above for restrictions.  Avoid && and || as they tickle
+   bugs in Sun C 5.11 2010/08/13 and other compilers; see
+   <https://lists.gnu.org/r/bug-gnulib/2011-05/msg00401.html>.  */
+#define INT_MULTIPLY_RANGE_OVERFLOW(a, b, min, max)     \
+  ((b) < 0                                              \
+   ? ((a) < 0                                           \
+      ? (a) < (max) / (b)                               \
+      : (b) == -1                                       \
+      ? 0                                               \
+      : (min) / (b) < (a))                              \
+   : (b) == 0                                           \
+   ? 0                                                  \
+   : ((a) < 0                                           \
+      ? (a) < (min) / (b)                               \
+      : (max) / (b) < (a)))
+
+/* Return 1 if A / B would overflow in [MIN,MAX] arithmetic.
+   See above for restrictions.  Do not check for division by zero.  */
+#define INT_DIVIDE_RANGE_OVERFLOW(a, b, min, max)       \
+  ((min) < 0 && (b) == -1 && (a) < - (max))
+
+/* Return 1 if A % B would overflow in [MIN,MAX] arithmetic.
+   See above for restrictions.  Do not check for division by zero.
+   Mathematically, % should never overflow, but on x86-like hosts
+   INT_MIN % -1 traps, and the C standard permits this, so treat this
+   as an overflow too.  */
+#define INT_REMAINDER_RANGE_OVERFLOW(a, b, min, max)    \
+  INT_DIVIDE_RANGE_OVERFLOW (a, b, min, max)
+
+/* Return 1 if A << B would overflow in [MIN,MAX] arithmetic.
+   See above for restrictions.  Here, MIN and MAX are for A only, and B need
+   not be of the same type as the other arguments.  The C standard says that
+   behavior is undefined for shifts unless 0 <= B < wordwidth, and that when
+   A is negative then A << B has undefined behavior and A >> B has
+   implementation-defined behavior, but do not check these other
+   restrictions.  */
+#define INT_LEFT_SHIFT_RANGE_OVERFLOW(a, b, min, max)   \
+  ((a) < 0                                              \
+   ? (a) < (min) >> (b)                                 \
+   : (max) >> (b) < (a))
+
+/* True if __builtin_add_overflow (A, B, P) and __builtin_sub_overflow
+   (A, B, P) work when P is non-null.  */
+/* __builtin_{add,sub}_overflow exists but is not reliable in GCC 5.x and 6.x,
+   see <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98269>.  */
+#if 7 <= __GNUC__ && !defined __ICC
+# define _GL_HAS_BUILTIN_ADD_OVERFLOW 1
+#elif defined __has_builtin
+# define _GL_HAS_BUILTIN_ADD_OVERFLOW __has_builtin (__builtin_add_overflow)
+#else
+# define _GL_HAS_BUILTIN_ADD_OVERFLOW 0
+#endif
+
+/* True if __builtin_mul_overflow (A, B, P) works when P is non-null.  */
+#ifdef __clang__
+/* Work around Clang bug <https://bugs.llvm.org/show_bug.cgi?id=16404>.  */
+# define _GL_HAS_BUILTIN_MUL_OVERFLOW 0
+#else
+# define _GL_HAS_BUILTIN_MUL_OVERFLOW _GL_HAS_BUILTIN_ADD_OVERFLOW
+#endif
+
+/* True if __builtin_add_overflow_p (A, B, C) works, and similarly for
+   __builtin_sub_overflow_p and __builtin_mul_overflow_p.  */
+#if defined __clang__ || defined __ICC
+/* Clang 11 lacks __builtin_mul_overflow_p, and even if it did it
+   would presumably run afoul of Clang bug 16404.  ICC 2021.1's
+   __builtin_add_overflow_p etc. are not treated as integral constant
+   expressions even when all arguments are.  */
+# define _GL_HAS_BUILTIN_OVERFLOW_P 0
+#elif defined __has_builtin
+# define _GL_HAS_BUILTIN_OVERFLOW_P __has_builtin (__builtin_mul_overflow_p)
+#else
+# define _GL_HAS_BUILTIN_OVERFLOW_P (7 <= __GNUC__)
+#endif
+
+/* The _GL*_OVERFLOW macros have the same restrictions as the
+   *_RANGE_OVERFLOW macros, except that they do not assume that operands
+   (e.g., A and B) have the same type as MIN and MAX.  Instead, they assume
+   that the result (e.g., A + B) has that type.  */
+#if _GL_HAS_BUILTIN_OVERFLOW_P
+# define _GL_ADD_OVERFLOW(a, b, min, max)                               \
+   __builtin_add_overflow_p (a, b, (__typeof__ ((a) + (b))) 0)
+# define _GL_SUBTRACT_OVERFLOW(a, b, min, max)                          \
+   __builtin_sub_overflow_p (a, b, (__typeof__ ((a) - (b))) 0)
+# define _GL_MULTIPLY_OVERFLOW(a, b, min, max)                          \
+   __builtin_mul_overflow_p (a, b, (__typeof__ ((a) * (b))) 0)
+#else
+# define _GL_ADD_OVERFLOW(a, b, min, max)                                \
+   ((min) < 0 ? INT_ADD_RANGE_OVERFLOW (a, b, min, max)                  \
+    : (a) < 0 ? (b) <= (a) + (b)                                         \
+    : (b) < 0 ? (a) <= (a) + (b)                                         \
+    : (a) + (b) < (b))
+# define _GL_SUBTRACT_OVERFLOW(a, b, min, max)                           \
+   ((min) < 0 ? INT_SUBTRACT_RANGE_OVERFLOW (a, b, min, max)             \
+    : (a) < 0 ? 1                                                        \
+    : (b) < 0 ? (a) - (b) <= (a)                                         \
+    : (a) < (b))
+# define _GL_MULTIPLY_OVERFLOW(a, b, min, max)                           \
+   (((min) == 0 && (((a) < 0 && 0 < (b)) || ((b) < 0 && 0 < (a))))       \
+    || INT_MULTIPLY_RANGE_OVERFLOW (a, b, min, max))
+#endif
+#define _GL_DIVIDE_OVERFLOW(a, b, min, max)                             \
+  ((min) < 0 ? (b) == _GL_INT_NEGATE_CONVERT (min, 1) && (a) < - (max)  \
+   : (a) < 0 ? (b) <= (a) + (b) - 1                                     \
+   : (b) < 0 && (a) + (b) <= (a))
+#define _GL_REMAINDER_OVERFLOW(a, b, min, max)                          \
+  ((min) < 0 ? (b) == _GL_INT_NEGATE_CONVERT (min, 1) && (a) < - (max)  \
+   : (a) < 0 ? (a) % (b) != ((max) - (b) + 1) % (b)                     \
+   : (b) < 0 && ! _GL_UNSIGNED_NEG_MULTIPLE (a, b, max))
+
+/* Return a nonzero value if A is a mathematical multiple of B, where
+   A is unsigned, B is negative, and MAX is the maximum value of A's
+   type.  A's type must be the same as (A % B)'s type.  Normally (A %
+   -B == 0) suffices, but things get tricky if -B would overflow.  */
+#define _GL_UNSIGNED_NEG_MULTIPLE(a, b, max)                            \
+  (((b) < -_GL_SIGNED_INT_MAXIMUM (b)                                   \
+    ? (_GL_SIGNED_INT_MAXIMUM (b) == (max)                              \
+       ? (a)                                                            \
+       : (a) % (_GL_INT_CONVERT (a, _GL_SIGNED_INT_MAXIMUM (b)) + 1))   \
+    : (a) % - (b))                                                      \
+   == 0)
+
+/* Check for integer overflow, and report low order bits of answer.
+
+   The INT_<op>_OVERFLOW macros return 1 if the corresponding C operators
+   might not yield numerically correct answers due to arithmetic overflow.
+   The INT_<op>_WRAPV macros compute the low-order bits of the sum,
+   difference, and product of two C integers, and return 1 if these
+   low-order bits are not numerically correct.
+   These macros work correctly on all known practical hosts, and do not rely
+   on undefined behavior due to signed arithmetic overflow.
+
+   Example usage, assuming A and B are long int:
+
+     if (INT_MULTIPLY_OVERFLOW (a, b))
+       printf ("result would overflow\n");
+     else
+       printf ("result is %ld (no overflow)\n", a * b);
+
+   Example usage with WRAPV flavor:
+
+     long int result;
+     bool overflow = INT_MULTIPLY_WRAPV (a, b, &result);
+     printf ("result is %ld (%s)\n", result,
+             overflow ? "after overflow" : "no overflow");
+
+   Restrictions on these macros:
+
+   These macros do not check for all possible numerical problems or
+   undefined or unspecified behavior: they do not check for division
+   by zero, for bad shift counts, or for shifting negative numbers.
+
+   These macros may evaluate their arguments zero or multiple times, so the
+   arguments should not have side effects.
+
+   The WRAPV macros are not constant expressions.  They support only
+   +, binary -, and *.
+
+   Because the WRAPV macros convert the result, they report overflow
+   in different circumstances than the OVERFLOW macros do.  For
+   example, in the typical case with 16-bit 'short' and 32-bit 'int',
+   if A, B and R are all of type 'short' then INT_ADD_OVERFLOW (A, B)
+   returns false because the addition cannot overflow after A and B
+   are converted to 'int', whereas INT_ADD_WRAPV (A, B, &R) returns
+   true or false depending on whether the sum fits into 'short'.
+
+   These macros are tuned for their last input argument being a constant.
+
+   Return 1 if the integer expressions A * B, A - B, -A, A * B, A / B,
+   A % B, and A << B would overflow, respectively.  */
+
+#define INT_ADD_OVERFLOW(a, b) \
+  _GL_BINARY_OP_OVERFLOW (a, b, _GL_ADD_OVERFLOW)
+#define INT_SUBTRACT_OVERFLOW(a, b) \
+  _GL_BINARY_OP_OVERFLOW (a, b, _GL_SUBTRACT_OVERFLOW)
+#if _GL_HAS_BUILTIN_OVERFLOW_P
+# define INT_NEGATE_OVERFLOW(a) INT_SUBTRACT_OVERFLOW (0, a)
+#else
+# define INT_NEGATE_OVERFLOW(a) \
+   INT_NEGATE_RANGE_OVERFLOW (a, _GL_INT_MINIMUM (a), _GL_INT_MAXIMUM (a))
+#endif
+#define INT_MULTIPLY_OVERFLOW(a, b) \
+  _GL_BINARY_OP_OVERFLOW (a, b, _GL_MULTIPLY_OVERFLOW)
+#define INT_DIVIDE_OVERFLOW(a, b) \
+  _GL_BINARY_OP_OVERFLOW (a, b, _GL_DIVIDE_OVERFLOW)
+#define INT_REMAINDER_OVERFLOW(a, b) \
+  _GL_BINARY_OP_OVERFLOW (a, b, _GL_REMAINDER_OVERFLOW)
+#define INT_LEFT_SHIFT_OVERFLOW(a, b) \
+  INT_LEFT_SHIFT_RANGE_OVERFLOW (a, b, \
+                                 _GL_INT_MINIMUM (a), _GL_INT_MAXIMUM (a))
+
+/* Return 1 if the expression A <op> B would overflow,
+   where OP_RESULT_OVERFLOW (A, B, MIN, MAX) does the actual test,
+   assuming MIN and MAX are the minimum and maximum for the result type.
+   Arguments should be free of side effects.  */
+#define _GL_BINARY_OP_OVERFLOW(a, b, op_result_overflow)        \
+  op_result_overflow (a, b,                                     \
+                      _GL_INT_MINIMUM (_GL_INT_CONVERT (a, b)), \
+                      _GL_INT_MAXIMUM (_GL_INT_CONVERT (a, b)))
+
+/* Store the low-order bits of A + B, A - B, A * B, respectively, into *R.
+   Return 1 if the result overflows.  See above for restrictions.  */
+#if _GL_HAS_BUILTIN_ADD_OVERFLOW
+# define INT_ADD_WRAPV(a, b, r) __builtin_add_overflow (a, b, r)
+# define INT_SUBTRACT_WRAPV(a, b, r) __builtin_sub_overflow (a, b, r)
+#else
+# define INT_ADD_WRAPV(a, b, r) \
+   _GL_INT_OP_WRAPV (a, b, r, +, _GL_INT_ADD_RANGE_OVERFLOW)
+# define INT_SUBTRACT_WRAPV(a, b, r) \
+   _GL_INT_OP_WRAPV (a, b, r, -, _GL_INT_SUBTRACT_RANGE_OVERFLOW)
+#endif
+#if _GL_HAS_BUILTIN_MUL_OVERFLOW
+# if ((9 < __GNUC__ + (3 <= __GNUC_MINOR__) \
+       || (__GNUC__ == 8 && 4 <= __GNUC_MINOR__)) \
+      && !defined __ICC)
+#  define INT_MULTIPLY_WRAPV(a, b, r) __builtin_mul_overflow (a, b, r)
+# else
+   /* Work around GCC bug 91450.  */
+#  define INT_MULTIPLY_WRAPV(a, b, r) \
+    ((!_GL_SIGNED_TYPE_OR_EXPR (*(r)) && EXPR_SIGNED (a) && EXPR_SIGNED (b) \
+      && _GL_INT_MULTIPLY_RANGE_OVERFLOW (a, b, 0, (__typeof__ (*(r))) -1)) \
+     ? ((void) __builtin_mul_overflow (a, b, r), 1) \
+     : __builtin_mul_overflow (a, b, r))
+# endif
+#else
+# define INT_MULTIPLY_WRAPV(a, b, r) \
+   _GL_INT_OP_WRAPV (a, b, r, *, _GL_INT_MULTIPLY_RANGE_OVERFLOW)
+#endif
+
+/* Nonzero if this compiler has GCC bug 68193 or Clang bug 25390.  See:
+   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68193
+   https://llvm.org/bugs/show_bug.cgi?id=25390
+   For now, assume all versions of GCC-like compilers generate bogus
+   warnings for _Generic.  This matters only for compilers that
+   lack relevant builtins.  */
+#if __GNUC__ || defined __clang__
+# define _GL__GENERIC_BOGUS 1
+#else
+# define _GL__GENERIC_BOGUS 0
+#endif
+
+/* Store the low-order bits of A <op> B into *R, where OP specifies
+   the operation and OVERFLOW the overflow predicate.  Return 1 if the
+   result overflows.  See above for restrictions.  */
+#if 201112 <= __STDC_VERSION__ && !_GL__GENERIC_BOGUS
+# define _GL_INT_OP_WRAPV(a, b, r, op, overflow) \
+   (_Generic \
+    (*(r), \
+     signed char: \
+       _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
+                        signed char, SCHAR_MIN, SCHAR_MAX), \
+     unsigned char: \
+       _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
+                        unsigned char, 0, UCHAR_MAX), \
+     short int: \
+       _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
+                        short int, SHRT_MIN, SHRT_MAX), \
+     unsigned short int: \
+       _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
+                        unsigned short int, 0, USHRT_MAX), \
+     int: \
+       _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
+                        int, INT_MIN, INT_MAX), \
+     unsigned int: \
+       _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
+                        unsigned int, 0, UINT_MAX), \
+     long int: \
+       _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
+                        long int, LONG_MIN, LONG_MAX), \
+     unsigned long int: \
+       _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
+                        unsigned long int, 0, ULONG_MAX), \
+     long long int: \
+       _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long long int, \
+                        long long int, LLONG_MIN, LLONG_MAX), \
+     unsigned long long int: \
+       _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long long int, \
+                        unsigned long long int, 0, ULLONG_MAX)))
+#else
+/* Store the low-order bits of A <op> B into *R, where OP specifies
+   the operation and OVERFLOW the overflow predicate.  If *R is
+   signed, its type is ST with bounds SMIN..SMAX; otherwise its type
+   is UT with bounds U..UMAX.  ST and UT are narrower than int.
+   Return 1 if the result overflows.  See above for restrictions.  */
+# if _GL_HAVE___TYPEOF__
+#  define _GL_INT_OP_WRAPV_SMALLISH(a,b,r,op,overflow,st,smin,smax,ut,umax) \
+    (TYPE_SIGNED (__typeof__ (*(r))) \
+     ? _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, st, smin, smax) \
+     : _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, ut, 0, umax))
+# else
+#  define _GL_INT_OP_WRAPV_SMALLISH(a,b,r,op,overflow,st,smin,smax,ut,umax) \
+    (overflow (a, b, smin, smax) \
+     ? (overflow (a, b, 0, umax) \
+        ? (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a,b,op,unsigned,st), 1) \
+        : (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a,b,op,unsigned,st)) < 0) \
+     : (overflow (a, b, 0, umax) \
+        ? (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a,b,op,unsigned,st)) >= 0 \
+        : (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a,b,op,unsigned,st), 0)))
+# endif
+
+# define _GL_INT_OP_WRAPV(a, b, r, op, overflow) \
+   (sizeof *(r) == sizeof (signed char) \
+    ? _GL_INT_OP_WRAPV_SMALLISH (a, b, r, op, overflow, \
+                                 signed char, SCHAR_MIN, SCHAR_MAX, \
+                                 unsigned char, UCHAR_MAX) \
+    : sizeof *(r) == sizeof (short int) \
+    ? _GL_INT_OP_WRAPV_SMALLISH (a, b, r, op, overflow, \
+                                 short int, SHRT_MIN, SHRT_MAX, \
+                                 unsigned short int, USHRT_MAX) \
+    : sizeof *(r) == sizeof (int) \
+    ? (EXPR_SIGNED (*(r)) \
+       ? _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
+                          int, INT_MIN, INT_MAX) \
+       : _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
+                          unsigned int, 0, UINT_MAX)) \
+    : _GL_INT_OP_WRAPV_LONGISH(a, b, r, op, overflow))
+# ifdef LLONG_MAX
+#  define _GL_INT_OP_WRAPV_LONGISH(a, b, r, op, overflow) \
+    (sizeof *(r) == sizeof (long int) \
+     ? (EXPR_SIGNED (*(r)) \
+        ? _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
+                           long int, LONG_MIN, LONG_MAX) \
+        : _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
+                           unsigned long int, 0, ULONG_MAX)) \
+     : (EXPR_SIGNED (*(r)) \
+        ? _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long long int, \
+                           long long int, LLONG_MIN, LLONG_MAX) \
+        : _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long long int, \
+                           unsigned long long int, 0, ULLONG_MAX)))
+# else
+#  define _GL_INT_OP_WRAPV_LONGISH(a, b, r, op, overflow) \
+    (EXPR_SIGNED (*(r)) \
+     ? _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
+                        long int, LONG_MIN, LONG_MAX) \
+     : _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
+                        unsigned long int, 0, ULONG_MAX))
+# endif
+#endif
+
+/* Store the low-order bits of A <op> B into *R, where the operation
+   is given by OP.  Use the unsigned type UT for calculation to avoid
+   overflow problems.  *R's type is T, with extrema TMIN and TMAX.
+   T must be a signed integer type.  Return 1 if the result overflows.  */
+#define _GL_INT_OP_CALC(a, b, r, op, overflow, ut, t, tmin, tmax) \
+  (overflow (a, b, tmin, tmax) \
+   ? (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a, b, op, ut, t), 1) \
+   : (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a, b, op, ut, t), 0))
+
+/* Return the low-order bits of A <op> B, where the operation is given
+   by OP.  Use the unsigned type UT for calculation to avoid undefined
+   behavior on signed integer overflow, and convert the result to type T.
+   UT is at least as wide as T and is no narrower than unsigned int,
+   T is two's complement, and there is no padding or trap representations.
+   Assume that converting UT to T yields the low-order bits, as is
+   done in all known two's-complement C compilers.  E.g., see:
+   https://gcc.gnu.org/onlinedocs/gcc/Integers-implementation.html
+
+   According to the C standard, converting UT to T yields an
+   implementation-defined result or signal for values outside T's
+   range.  However, code that works around this theoretical problem
+   runs afoul of a compiler bug in Oracle Studio 12.3 x86.  See:
+   https://lists.gnu.org/r/bug-gnulib/2017-04/msg00049.html
+   As the compiler bug is real, don't try to work around the
+   theoretical problem.  */
+
+#define _GL_INT_OP_WRAPV_VIA_UNSIGNED(a, b, op, ut, t) \
+  ((t) ((ut) (a) op (ut) (b)))
+
+/* Return true if the numeric values A + B, A - B, A * B fall outside
+   the range TMIN..TMAX.  Arguments should be integer expressions
+   without side effects.  TMIN should be signed and nonpositive.
+   TMAX should be positive, and should be signed unless TMIN is zero.  */
+#define _GL_INT_ADD_RANGE_OVERFLOW(a, b, tmin, tmax) \
+  ((b) < 0 \
+   ? (((tmin) \
+       ? ((EXPR_SIGNED (_GL_INT_CONVERT (a, (tmin) - (b))) || (b) < (tmin)) \
+          && (a) < (tmin) - (b)) \
+       : (a) <= -1 - (b)) \
+      || ((EXPR_SIGNED (a) ? 0 <= (a) : (tmax) < (a)) && (tmax) < (a) + (b))) \
+   : (a) < 0 \
+   ? (((tmin) \
+       ? ((EXPR_SIGNED (_GL_INT_CONVERT (b, (tmin) - (a))) || (a) < (tmin)) \
+          && (b) < (tmin) - (a)) \
+       : (b) <= -1 - (a)) \
+      || ((EXPR_SIGNED (_GL_INT_CONVERT (a, b)) || (tmax) < (b)) \
+          && (tmax) < (a) + (b))) \
+   : (tmax) < (b) || (tmax) - (b) < (a))
+#define _GL_INT_SUBTRACT_RANGE_OVERFLOW(a, b, tmin, tmax) \
+  (((a) < 0) == ((b) < 0) \
+   ? ((a) < (b) \
+      ? !(tmin) || -1 - (tmin) < (b) - (a) - 1 \
+      : (tmax) < (a) - (b)) \
+   : (a) < 0 \
+   ? ((!EXPR_SIGNED (_GL_INT_CONVERT ((a) - (tmin), b)) && (a) - (tmin) < 0) \
+      || (a) - (tmin) < (b)) \
+   : ((! (EXPR_SIGNED (_GL_INT_CONVERT (tmax, b)) \
+          && EXPR_SIGNED (_GL_INT_CONVERT ((tmax) + (b), a))) \
+       && (tmax) <= -1 - (b)) \
+      || (tmax) + (b) < (a)))
+#define _GL_INT_MULTIPLY_RANGE_OVERFLOW(a, b, tmin, tmax) \
+  ((b) < 0 \
+   ? ((a) < 0 \
+      ? (EXPR_SIGNED (_GL_INT_CONVERT (tmax, b)) \
+         ? (a) < (tmax) / (b) \
+         : ((INT_NEGATE_OVERFLOW (b) \
+             ? _GL_INT_CONVERT (b, tmax) >> (TYPE_WIDTH (+ (b)) - 1) \
+             : (tmax) / -(b)) \
+            <= -1 - (a))) \
+      : INT_NEGATE_OVERFLOW (_GL_INT_CONVERT (b, tmin)) && (b) == -1 \
+      ? (EXPR_SIGNED (a) \
+         ? 0 < (a) + (tmin) \
+         : 0 < (a) && -1 - (tmin) < (a) - 1) \
+      : (tmin) / (b) < (a)) \
+   : (b) == 0 \
+   ? 0 \
+   : ((a) < 0 \
+      ? (INT_NEGATE_OVERFLOW (_GL_INT_CONVERT (a, tmin)) && (a) == -1 \
+         ? (EXPR_SIGNED (b) ? 0 < (b) + (tmin) : -1 - (tmin) < (b) - 1) \
+         : (tmin) / (a) < (b)) \
+      : (tmax) / (b) < (a)))
+
+/* The following macros compute A + B, A - B, and A * B, respectively.
+   If no overflow occurs, they set *R to the result and return 1;
+   otherwise, they return 0 and may modify *R.
+
+   Example usage:
+
+     long int result;
+     if (INT_ADD_OK (a, b, &result))
+       printf ("result is %ld\n", result);
+     else
+       printf ("overflow\n");
+
+   A, B, and *R should be integers; they need not be the same type,
+   and they need not be all signed or all unsigned.
+
+   These macros work correctly on all known practical hosts, and do not rely
+   on undefined behavior due to signed arithmetic overflow.
+
+   These macros are not constant expressions.
+
+   These macros may evaluate their arguments zero or multiple times, so the
+   arguments should not have side effects.
+
+   These macros are tuned for B being a constant.  */
+
+#define INT_ADD_OK(a, b, r) ! INT_ADD_WRAPV (a, b, r)
+#define INT_SUBTRACT_OK(a, b, r) ! INT_SUBTRACT_WRAPV (a, b, r)
+#define INT_MULTIPLY_OK(a, b, r) ! INT_MULTIPLY_WRAPV (a, b, r)
+
+#endif /* _GL_INTPROPS_H */
diff --git a/src/grep/lib/inttypes.in.h b/src/grep/lib/inttypes.in.h
new file mode 100644
index 0000000..41cb422
--- /dev/null
+++ b/src/grep/lib/inttypes.in.h
@@ -0,0 +1,1002 @@
+/* Copyright (C) 2006-2021 Free Software Foundation, Inc.
+   Written by Paul Eggert, Bruno Haible, Derek Price.
+   This file is part of gnulib.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/*
+ * ISO C 99 <inttypes.h> for platforms that lack it.
+ * <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/inttypes.h.html>
+ */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* Include the original <inttypes.h> if it exists, and if this file
+   has not been included yet or if this file includes gnulib stdint.h
+   which in turn includes this file.
+   The include_next requires a split double-inclusion guard.  */
+#if ! defined INTTYPES_H || defined _GL_JUST_INCLUDE_SYSTEM_INTTYPES_H
+# if @HAVE_INTTYPES_H@
+
+   /* Some pre-C++11 <stdint.h> implementations need this.  */
+#  if defined __cplusplus && ! defined __STDC_FORMAT_MACROS
+#   define __STDC_FORMAT_MACROS 1
+#  endif
+
+#  @INCLUDE_NEXT@ @NEXT_INTTYPES_H@
+
+#  define _GL_FINISHED_INCLUDING_SYSTEM_INTTYPES_H
+# endif
+#endif
+
+#if ! defined INTTYPES_H && ! defined _GL_JUST_INCLUDE_SYSTEM_INTTYPES_H
+#define INTTYPES_H
+
+/* Include <stdint.h> or the gnulib replacement.
+   But avoid namespace pollution on glibc systems.  */
+#ifndef __GLIBC__
+# include <stdint.h>
+#endif
+/* Get CHAR_BIT, INT_MAX, LONG_MAX, etc.  */
+#include <limits.h>
+/* On mingw, __USE_MINGW_ANSI_STDIO only works if <stdio.h> is also included */
+#if defined _WIN32 && ! defined __CYGWIN__
+# include <stdio.h>
+#endif
+
+#if !(INT_MAX == 0x7fffffff && INT_MIN + INT_MAX == -1)
+# error "This file assumes that 'int' is 32-bit two's complement. Please report your platform and compiler to <bug-gnulib@gnu.org>."
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+/* 7.8.1 Macros for format specifiers */
+
+#if defined _TNS_R_TARGET
+   /* Tandem NonStop R series and compatible platforms released before
+      July 2005 support %Ld but not %lld.  */
+# define _LONG_LONG_FORMAT_PREFIX "L"
+#else
+# define _LONG_LONG_FORMAT_PREFIX "ll"
+#endif
+
+#if !defined PRId8
+# ifdef INT8_MAX
+#  define PRId8 "d"
+# endif
+#endif
+#if !defined PRIi8
+# ifdef INT8_MAX
+#  define PRIi8 "i"
+# endif
+#endif
+#if !defined PRIo8
+# ifdef UINT8_MAX
+#  define PRIo8 "o"
+# endif
+#endif
+#if !defined PRIu8
+# ifdef UINT8_MAX
+#  define PRIu8 "u"
+# endif
+#endif
+#if !defined PRIx8
+# ifdef UINT8_MAX
+#  define PRIx8 "x"
+# endif
+#endif
+#if !defined PRIX8
+# ifdef UINT8_MAX
+#  define PRIX8 "X"
+# endif
+#endif
+#if !defined PRId16
+# ifdef INT16_MAX
+#  define PRId16 "d"
+# endif
+#endif
+#if !defined PRIi16
+# ifdef INT16_MAX
+#  define PRIi16 "i"
+# endif
+#endif
+#if !defined PRIo16
+# ifdef UINT16_MAX
+#  define PRIo16 "o"
+# endif
+#endif
+#if !defined PRIu16
+# ifdef UINT16_MAX
+#  define PRIu16 "u"
+# endif
+#endif
+#if !defined PRIx16
+# ifdef UINT16_MAX
+#  define PRIx16 "x"
+# endif
+#endif
+#if !defined PRIX16
+# ifdef UINT16_MAX
+#  define PRIX16 "X"
+# endif
+#endif
+#if !defined PRId32
+# ifdef INT32_MAX
+#  define PRId32 "d"
+# endif
+#endif
+#if !defined PRIi32
+# ifdef INT32_MAX
+#  define PRIi32 "i"
+# endif
+#endif
+#if !defined PRIo32
+# ifdef UINT32_MAX
+#  define PRIo32 "o"
+# endif
+#endif
+#if !defined PRIu32
+# ifdef UINT32_MAX
+#  define PRIu32 "u"
+# endif
+#endif
+#if !defined PRIx32
+# ifdef UINT32_MAX
+#  define PRIx32 "x"
+# endif
+#endif
+#if !defined PRIX32
+# ifdef UINT32_MAX
+#  define PRIX32 "X"
+# endif
+#endif
+#ifdef INT64_MAX
+# if (@APPLE_UNIVERSAL_BUILD@ ? defined _LP64 : @INT64_MAX_EQ_LONG_MAX@)
+#  define _PRI64_PREFIX "l"
+# elif defined _MSC_VER || defined __MINGW32__
+#  define _PRI64_PREFIX "I64"
+# elif LONG_MAX >> 30 == 1
+#  define _PRI64_PREFIX _LONG_LONG_FORMAT_PREFIX
+# endif
+# if !defined PRId64
+#  define PRId64 _PRI64_PREFIX "d"
+# endif
+# if !defined PRIi64
+#  define PRIi64 _PRI64_PREFIX "i"
+# endif
+#endif
+#ifdef UINT64_MAX
+# if (@APPLE_UNIVERSAL_BUILD@ ? defined _LP64 : @UINT64_MAX_EQ_ULONG_MAX@)
+#  define _PRIu64_PREFIX "l"
+# elif defined _MSC_VER || defined __MINGW32__
+#  define _PRIu64_PREFIX "I64"
+# elif ULONG_MAX >> 31 == 1
+#  define _PRIu64_PREFIX _LONG_LONG_FORMAT_PREFIX
+# endif
+# if !defined PRIo64
+#  define PRIo64 _PRIu64_PREFIX "o"
+# endif
+# if !defined PRIu64
+#  define PRIu64 _PRIu64_PREFIX "u"
+# endif
+# if !defined PRIx64
+#  define PRIx64 _PRIu64_PREFIX "x"
+# endif
+# if !defined PRIX64
+#  define PRIX64 _PRIu64_PREFIX "X"
+# endif
+#endif
+
+#if !defined PRIdLEAST8
+# define PRIdLEAST8 "d"
+#endif
+#if !defined PRIiLEAST8
+# define PRIiLEAST8 "i"
+#endif
+#if !defined PRIoLEAST8
+# define PRIoLEAST8 "o"
+#endif
+#if !defined PRIuLEAST8
+# define PRIuLEAST8 "u"
+#endif
+#if !defined PRIxLEAST8
+# define PRIxLEAST8 "x"
+#endif
+#if !defined PRIXLEAST8
+# define PRIXLEAST8 "X"
+#endif
+#if !defined PRIdLEAST16
+# define PRIdLEAST16 "d"
+#endif
+#if !defined PRIiLEAST16
+# define PRIiLEAST16 "i"
+#endif
+#if !defined PRIoLEAST16
+# define PRIoLEAST16 "o"
+#endif
+#if !defined PRIuLEAST16
+# define PRIuLEAST16 "u"
+#endif
+#if !defined PRIxLEAST16
+# define PRIxLEAST16 "x"
+#endif
+#if !defined PRIXLEAST16
+# define PRIXLEAST16 "X"
+#endif
+#if !defined PRIdLEAST32
+# define PRIdLEAST32 "d"
+#endif
+#if !defined PRIiLEAST32
+# define PRIiLEAST32 "i"
+#endif
+#if !defined PRIoLEAST32
+# define PRIoLEAST32 "o"
+#endif
+#if !defined PRIuLEAST32
+# define PRIuLEAST32 "u"
+#endif
+#if !defined PRIxLEAST32
+# define PRIxLEAST32 "x"
+#endif
+#if !defined PRIXLEAST32
+# define PRIXLEAST32 "X"
+#endif
+#ifdef INT64_MAX
+# if !defined PRIdLEAST64
+#  define PRIdLEAST64 PRId64
+# endif
+# if !defined PRIiLEAST64
+#  define PRIiLEAST64 PRIi64
+# endif
+#endif
+#ifdef UINT64_MAX
+# if !defined PRIoLEAST64
+#  define PRIoLEAST64 PRIo64
+# endif
+# if !defined PRIuLEAST64
+#  define PRIuLEAST64 PRIu64
+# endif
+# if !defined PRIxLEAST64
+#  define PRIxLEAST64 PRIx64
+# endif
+# if !defined PRIXLEAST64
+#  define PRIXLEAST64 PRIX64
+# endif
+#endif
+
+#if !defined PRIdFAST8
+# if INT_FAST8_MAX > INT32_MAX
+#  define PRIdFAST8 PRId64
+# else
+#  define PRIdFAST8 "d"
+# endif
+#endif
+#if !defined PRIiFAST8
+# if INT_FAST8_MAX > INT32_MAX
+#  define PRIiFAST8 PRIi64
+# else
+#  define PRIiFAST8 "i"
+# endif
+#endif
+#if !defined PRIoFAST8
+# if UINT_FAST8_MAX > UINT32_MAX
+#  define PRIoFAST8 PRIo64
+# else
+#  define PRIoFAST8 "o"
+# endif
+#endif
+#if !defined PRIuFAST8
+# if UINT_FAST8_MAX > UINT32_MAX
+#  define PRIuFAST8 PRIu64
+# else
+#  define PRIuFAST8 "u"
+# endif
+#endif
+#if !defined PRIxFAST8
+# if UINT_FAST8_MAX > UINT32_MAX
+#  define PRIxFAST8 PRIx64
+# else
+#  define PRIxFAST8 "x"
+# endif
+#endif
+#if !defined PRIXFAST8
+# if UINT_FAST8_MAX > UINT32_MAX
+#  define PRIXFAST8 PRIX64
+# else
+#  define PRIXFAST8 "X"
+# endif
+#endif
+#if !defined PRIdFAST16
+# if INT_FAST16_MAX > INT32_MAX
+#  define PRIdFAST16 PRId64
+# else
+#  define PRIdFAST16 "d"
+# endif
+#endif
+#if !defined PRIiFAST16
+# if INT_FAST16_MAX > INT32_MAX
+#  define PRIiFAST16 PRIi64
+# else
+#  define PRIiFAST16 "i"
+# endif
+#endif
+#if !defined PRIoFAST16
+# if UINT_FAST16_MAX > UINT32_MAX
+#  define PRIoFAST16 PRIo64
+# else
+#  define PRIoFAST16 "o"
+# endif
+#endif
+#if !defined PRIuFAST16
+# if UINT_FAST16_MAX > UINT32_MAX
+#  define PRIuFAST16 PRIu64
+# else
+#  define PRIuFAST16 "u"
+# endif
+#endif
+#if !defined PRIxFAST16
+# if UINT_FAST16_MAX > UINT32_MAX
+#  define PRIxFAST16 PRIx64
+# else
+#  define PRIxFAST16 "x"
+# endif
+#endif
+#if !defined PRIXFAST16
+# if UINT_FAST16_MAX > UINT32_MAX
+#  define PRIXFAST16 PRIX64
+# else
+#  define PRIXFAST16 "X"
+# endif
+#endif
+#if !defined PRIdFAST32
+# if INT_FAST32_MAX > INT32_MAX
+#  define PRIdFAST32 PRId64
+# else
+#  define PRIdFAST32 "d"
+# endif
+#endif
+#if !defined PRIiFAST32
+# if INT_FAST32_MAX > INT32_MAX
+#  define PRIiFAST32 PRIi64
+# else
+#  define PRIiFAST32 "i"
+# endif
+#endif
+#if !defined PRIoFAST32
+# if UINT_FAST32_MAX > UINT32_MAX
+#  define PRIoFAST32 PRIo64
+# else
+#  define PRIoFAST32 "o"
+# endif
+#endif
+#if !defined PRIuFAST32
+# if UINT_FAST32_MAX > UINT32_MAX
+#  define PRIuFAST32 PRIu64
+# else
+#  define PRIuFAST32 "u"
+# endif
+#endif
+#if !defined PRIxFAST32
+# if UINT_FAST32_MAX > UINT32_MAX
+#  define PRIxFAST32 PRIx64
+# else
+#  define PRIxFAST32 "x"
+# endif
+#endif
+#if !defined PRIXFAST32
+# if UINT_FAST32_MAX > UINT32_MAX
+#  define PRIXFAST32 PRIX64
+# else
+#  define PRIXFAST32 "X"
+# endif
+#endif
+#ifdef INT64_MAX
+# if !defined PRIdFAST64
+#  define PRIdFAST64 PRId64
+# endif
+# if !defined PRIiFAST64
+#  define PRIiFAST64 PRIi64
+# endif
+#endif
+#ifdef UINT64_MAX
+# if !defined PRIoFAST64
+#  define PRIoFAST64 PRIo64
+# endif
+# if !defined PRIuFAST64
+#  define PRIuFAST64 PRIu64
+# endif
+# if !defined PRIxFAST64
+#  define PRIxFAST64 PRIx64
+# endif
+# if !defined PRIXFAST64
+#  define PRIXFAST64 PRIX64
+# endif
+#endif
+
+#if !defined PRIdMAX
+# if @INT32_MAX_LT_INTMAX_MAX@
+#  define PRIdMAX PRId64
+# else
+#  define PRIdMAX "ld"
+# endif
+#endif
+#if !defined PRIiMAX
+# if @INT32_MAX_LT_INTMAX_MAX@
+#  define PRIiMAX PRIi64
+# else
+#  define PRIiMAX "li"
+# endif
+#endif
+#if !defined PRIoMAX
+# if @UINT32_MAX_LT_UINTMAX_MAX@
+#  define PRIoMAX PRIo64
+# else
+#  define PRIoMAX "lo"
+# endif
+#endif
+#if !defined PRIuMAX
+# if @UINT32_MAX_LT_UINTMAX_MAX@
+#  define PRIuMAX PRIu64
+# else
+#  define PRIuMAX "lu"
+# endif
+#endif
+#if !defined PRIxMAX
+# if @UINT32_MAX_LT_UINTMAX_MAX@
+#  define PRIxMAX PRIx64
+# else
+#  define PRIxMAX "lx"
+# endif
+#endif
+#if !defined PRIXMAX
+# if @UINT32_MAX_LT_UINTMAX_MAX@
+#  define PRIXMAX PRIX64
+# else
+#  define PRIXMAX "lX"
+# endif
+#endif
+
+#if !defined PRIdPTR
+# ifdef INTPTR_MAX
+#  define PRIdPTR @PRIPTR_PREFIX@ "d"
+# endif
+#endif
+#if !defined PRIiPTR
+# ifdef INTPTR_MAX
+#  define PRIiPTR @PRIPTR_PREFIX@ "i"
+# endif
+#endif
+#if !defined PRIoPTR
+# ifdef UINTPTR_MAX
+#  define PRIoPTR @PRIPTR_PREFIX@ "o"
+# endif
+#endif
+#if !defined PRIuPTR
+# ifdef UINTPTR_MAX
+#  define PRIuPTR @PRIPTR_PREFIX@ "u"
+# endif
+#endif
+#if !defined PRIxPTR
+# ifdef UINTPTR_MAX
+#  define PRIxPTR @PRIPTR_PREFIX@ "x"
+# endif
+#endif
+#if !defined PRIXPTR
+# ifdef UINTPTR_MAX
+#  define PRIXPTR @PRIPTR_PREFIX@ "X"
+# endif
+#endif
+
+#if !defined SCNd8
+# ifdef INT8_MAX
+#  define SCNd8 "hhd"
+# endif
+#endif
+#if !defined SCNi8
+# ifdef INT8_MAX
+#  define SCNi8 "hhi"
+# endif
+#endif
+#if !defined SCNo8
+# ifdef UINT8_MAX
+#  define SCNo8 "hho"
+# endif
+#endif
+#if !defined SCNu8
+# ifdef UINT8_MAX
+#  define SCNu8 "hhu"
+# endif
+#endif
+#if !defined SCNx8
+# ifdef UINT8_MAX
+#  define SCNx8 "hhx"
+# endif
+#endif
+#if !defined SCNd16
+# ifdef INT16_MAX
+#  define SCNd16 "hd"
+# endif
+#endif
+#if !defined SCNi16
+# ifdef INT16_MAX
+#  define SCNi16 "hi"
+# endif
+#endif
+#if !defined SCNo16
+# ifdef UINT16_MAX
+#  define SCNo16 "ho"
+# endif
+#endif
+#if !defined SCNu16
+# ifdef UINT16_MAX
+#  define SCNu16 "hu"
+# endif
+#endif
+#if !defined SCNx16
+# ifdef UINT16_MAX
+#  define SCNx16 "hx"
+# endif
+#endif
+#if !defined SCNd32
+# ifdef INT32_MAX
+#  define SCNd32 "d"
+# endif
+#endif
+#if !defined SCNi32
+# ifdef INT32_MAX
+#  define SCNi32 "i"
+# endif
+#endif
+#if !defined SCNo32
+# ifdef UINT32_MAX
+#  define SCNo32 "o"
+# endif
+#endif
+#if !defined SCNu32
+# ifdef UINT32_MAX
+#  define SCNu32 "u"
+# endif
+#endif
+#if !defined SCNx32
+# ifdef UINT32_MAX
+#  define SCNx32 "x"
+# endif
+#endif
+#ifdef INT64_MAX
+# if (@APPLE_UNIVERSAL_BUILD@ ? defined _LP64 : @INT64_MAX_EQ_LONG_MAX@)
+#  define _SCN64_PREFIX "l"
+# elif defined _MSC_VER || defined __MINGW32__
+#  define _SCN64_PREFIX "I64"
+# elif LONG_MAX >> 30 == 1
+#  define _SCN64_PREFIX _LONG_LONG_FORMAT_PREFIX
+# endif
+# if !defined SCNd64
+#  define SCNd64 _SCN64_PREFIX "d"
+# endif
+# if !defined SCNi64
+#  define SCNi64 _SCN64_PREFIX "i"
+# endif
+#endif
+#ifdef UINT64_MAX
+# if (@APPLE_UNIVERSAL_BUILD@ ? defined _LP64 : @UINT64_MAX_EQ_ULONG_MAX@)
+#  define _SCNu64_PREFIX "l"
+# elif defined _MSC_VER || defined __MINGW32__
+#  define _SCNu64_PREFIX "I64"
+# elif ULONG_MAX >> 31 == 1
+#  define _SCNu64_PREFIX _LONG_LONG_FORMAT_PREFIX
+# endif
+# if !defined SCNo64
+#  define SCNo64 _SCNu64_PREFIX "o"
+# endif
+# if !defined SCNu64
+#  define SCNu64 _SCNu64_PREFIX "u"
+# endif
+# if !defined SCNx64
+#  define SCNx64 _SCNu64_PREFIX "x"
+# endif
+#endif
+
+#if !defined SCNdLEAST8
+# define SCNdLEAST8 "hhd"
+#endif
+#if !defined SCNiLEAST8
+# define SCNiLEAST8 "hhi"
+#endif
+#if !defined SCNoLEAST8
+# define SCNoLEAST8 "hho"
+#endif
+#if !defined SCNuLEAST8
+# define SCNuLEAST8 "hhu"
+#endif
+#if !defined SCNxLEAST8
+# define SCNxLEAST8 "hhx"
+#endif
+#if !defined SCNdLEAST16
+# define SCNdLEAST16 "hd"
+#endif
+#if !defined SCNiLEAST16
+# define SCNiLEAST16 "hi"
+#endif
+#if !defined SCNoLEAST16
+# define SCNoLEAST16 "ho"
+#endif
+#if !defined SCNuLEAST16
+# define SCNuLEAST16 "hu"
+#endif
+#if !defined SCNxLEAST16
+# define SCNxLEAST16 "hx"
+#endif
+#if !defined SCNdLEAST32
+# define SCNdLEAST32 "d"
+#endif
+#if !defined SCNiLEAST32
+# define SCNiLEAST32 "i"
+#endif
+#if !defined SCNoLEAST32
+# define SCNoLEAST32 "o"
+#endif
+#if !defined SCNuLEAST32
+# define SCNuLEAST32 "u"
+#endif
+#if !defined SCNxLEAST32
+# define SCNxLEAST32 "x"
+#endif
+#ifdef INT64_MAX
+# if !defined SCNdLEAST64
+#  define SCNdLEAST64 SCNd64
+# endif
+# if !defined SCNiLEAST64
+#  define SCNiLEAST64 SCNi64
+# endif
+#endif
+#ifdef UINT64_MAX
+# if !defined SCNoLEAST64
+#  define SCNoLEAST64 SCNo64
+# endif
+# if !defined SCNuLEAST64
+#  define SCNuLEAST64 SCNu64
+# endif
+# if !defined SCNxLEAST64
+#  define SCNxLEAST64 SCNx64
+# endif
+#endif
+
+#if !defined SCNdFAST8
+# if INT_FAST8_MAX > INT32_MAX
+#  define SCNdFAST8 SCNd64
+# elif INT_FAST8_MAX == 0x7fff
+#  define SCNdFAST8 "hd"
+# elif INT_FAST8_MAX == 0x7f
+#  define SCNdFAST8 "hhd"
+# else
+#  define SCNdFAST8 "d"
+# endif
+#endif
+#if !defined SCNiFAST8
+# if INT_FAST8_MAX > INT32_MAX
+#  define SCNiFAST8 SCNi64
+# elif INT_FAST8_MAX == 0x7fff
+#  define SCNiFAST8 "hi"
+# elif INT_FAST8_MAX == 0x7f
+#  define SCNiFAST8 "hhi"
+# else
+#  define SCNiFAST8 "i"
+# endif
+#endif
+#if !defined SCNoFAST8
+# if UINT_FAST8_MAX > UINT32_MAX
+#  define SCNoFAST8 SCNo64
+# elif UINT_FAST8_MAX == 0xffff
+#  define SCNoFAST8 "ho"
+# elif UINT_FAST8_MAX == 0xff
+#  define SCNoFAST8 "hho"
+# else
+#  define SCNoFAST8 "o"
+# endif
+#endif
+#if !defined SCNuFAST8
+# if UINT_FAST8_MAX > UINT32_MAX
+#  define SCNuFAST8 SCNu64
+# elif UINT_FAST8_MAX == 0xffff
+#  define SCNuFAST8 "hu"
+# elif UINT_FAST8_MAX == 0xff
+#  define SCNuFAST8 "hhu"
+# else
+#  define SCNuFAST8 "u"
+# endif
+#endif
+#if !defined SCNxFAST8
+# if UINT_FAST8_MAX > UINT32_MAX
+#  define SCNxFAST8 SCNx64
+# elif UINT_FAST8_MAX == 0xffff
+#  define SCNxFAST8 "hx"
+# elif UINT_FAST8_MAX == 0xff
+#  define SCNxFAST8 "hhx"
+# else
+#  define SCNxFAST8 "x"
+# endif
+#endif
+#if !defined SCNdFAST16
+# if INT_FAST16_MAX > INT32_MAX
+#  define SCNdFAST16 SCNd64
+# elif INT_FAST16_MAX == 0x7fff
+#  define SCNdFAST16 "hd"
+# else
+#  define SCNdFAST16 "d"
+# endif
+#endif
+#if !defined SCNiFAST16
+# if INT_FAST16_MAX > INT32_MAX
+#  define SCNiFAST16 SCNi64
+# elif INT_FAST16_MAX == 0x7fff
+#  define SCNiFAST16 "hi"
+# else
+#  define SCNiFAST16 "i"
+# endif
+#endif
+#if !defined SCNoFAST16
+# if UINT_FAST16_MAX > UINT32_MAX
+#  define SCNoFAST16 SCNo64
+# elif UINT_FAST16_MAX == 0xffff
+#  define SCNoFAST16 "ho"
+# else
+#  define SCNoFAST16 "o"
+# endif
+#endif
+#if !defined SCNuFAST16
+# if UINT_FAST16_MAX > UINT32_MAX
+#  define SCNuFAST16 SCNu64
+# elif UINT_FAST16_MAX == 0xffff
+#  define SCNuFAST16 "hu"
+# else
+#  define SCNuFAST16 "u"
+# endif
+#endif
+#if !defined SCNxFAST16
+# if UINT_FAST16_MAX > UINT32_MAX
+#  define SCNxFAST16 SCNx64
+# elif UINT_FAST16_MAX == 0xffff
+#  define SCNxFAST16 "hx"
+# else
+#  define SCNxFAST16 "x"
+# endif
+#endif
+#if !defined SCNdFAST32
+# if INT_FAST32_MAX > INT32_MAX
+#  define SCNdFAST32 SCNd64
+# else
+#  define SCNdFAST32 "d"
+# endif
+#endif
+#if !defined SCNiFAST32
+# if INT_FAST32_MAX > INT32_MAX
+#  define SCNiFAST32 SCNi64
+# else
+#  define SCNiFAST32 "i"
+# endif
+#endif
+#if !defined SCNoFAST32
+# if UINT_FAST32_MAX > UINT32_MAX
+#  define SCNoFAST32 SCNo64
+# else
+#  define SCNoFAST32 "o"
+# endif
+#endif
+#if !defined SCNuFAST32
+# if UINT_FAST32_MAX > UINT32_MAX
+#  define SCNuFAST32 SCNu64
+# else
+#  define SCNuFAST32 "u"
+# endif
+#endif
+#if !defined SCNxFAST32
+# if UINT_FAST32_MAX > UINT32_MAX
+#  define SCNxFAST32 SCNx64
+# else
+#  define SCNxFAST32 "x"
+# endif
+#endif
+#ifdef INT64_MAX
+# if !defined SCNdFAST64
+#  define SCNdFAST64 SCNd64
+# endif
+# if !defined SCNiFAST64
+#  define SCNiFAST64 SCNi64
+# endif
+#endif
+#ifdef UINT64_MAX
+# if !defined SCNoFAST64
+#  define SCNoFAST64 SCNo64
+# endif
+# if !defined SCNuFAST64
+#  define SCNuFAST64 SCNu64
+# endif
+# if !defined SCNxFAST64
+#  define SCNxFAST64 SCNx64
+# endif
+#endif
+
+#if !defined SCNdMAX
+# if @INT32_MAX_LT_INTMAX_MAX@
+#  define SCNdMAX SCNd64
+# else
+#  define SCNdMAX "ld"
+# endif
+#endif
+#if !defined SCNiMAX
+# if @INT32_MAX_LT_INTMAX_MAX@
+#  define SCNiMAX SCNi64
+# else
+#  define SCNiMAX "li"
+# endif
+#endif
+#if !defined SCNoMAX
+# if @UINT32_MAX_LT_UINTMAX_MAX@
+#  define SCNoMAX SCNo64
+# else
+#  define SCNoMAX "lo"
+# endif
+#endif
+#if !defined SCNuMAX
+# if @UINT32_MAX_LT_UINTMAX_MAX@
+#  define SCNuMAX SCNu64
+# else
+#  define SCNuMAX "lu"
+# endif
+#endif
+#if !defined SCNxMAX
+# if @UINT32_MAX_LT_UINTMAX_MAX@
+#  define SCNxMAX SCNx64
+# else
+#  define SCNxMAX "lx"
+# endif
+#endif
+
+#if !defined SCNdPTR
+# ifdef INTPTR_MAX
+#  define SCNdPTR @PRIPTR_PREFIX@ "d"
+# endif
+#endif
+#if !defined SCNiPTR
+# ifdef INTPTR_MAX
+#  define SCNiPTR @PRIPTR_PREFIX@ "i"
+# endif
+#endif
+#if !defined SCNoPTR
+# ifdef UINTPTR_MAX
+#  define SCNoPTR @PRIPTR_PREFIX@ "o"
+# endif
+#endif
+#if !defined SCNuPTR
+# ifdef UINTPTR_MAX
+#  define SCNuPTR @PRIPTR_PREFIX@ "u"
+# endif
+#endif
+#if !defined SCNxPTR
+# ifdef UINTPTR_MAX
+#  define SCNxPTR @PRIPTR_PREFIX@ "x"
+# endif
+#endif
+
+/* 7.8.2 Functions for greatest-width integer types */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if @GNULIB_IMAXABS@
+# if !@HAVE_DECL_IMAXABS@
+extern intmax_t imaxabs (intmax_t);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef imaxabs
+# if HAVE_RAW_DECL_IMAXABS
+_GL_WARN_ON_USE (imaxabs, "imaxabs is unportable - "
+                 "use gnulib module imaxabs for portability");
+# endif
+#endif
+
+#if @GNULIB_IMAXDIV@
+# if !@HAVE_IMAXDIV_T@
+#  if !GNULIB_defined_imaxdiv_t
+typedef struct { intmax_t quot; intmax_t rem; } imaxdiv_t;
+#   define GNULIB_defined_imaxdiv_t 1
+#  endif
+# endif
+# if !@HAVE_DECL_IMAXDIV@
+extern imaxdiv_t imaxdiv (intmax_t, intmax_t);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef imaxdiv
+# if HAVE_RAW_DECL_IMAXDIV
+_GL_WARN_ON_USE (imaxdiv, "imaxdiv is unportable - "
+                 "use gnulib module imaxdiv for portability");
+# endif
+#endif
+
+#if @GNULIB_STRTOIMAX@
+# if @REPLACE_STRTOIMAX@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef strtoimax
+#   define strtoimax rpl_strtoimax
+#  endif
+_GL_FUNCDECL_RPL (strtoimax, intmax_t,
+                  (const char *restrict, char **restrict, int)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (strtoimax, intmax_t,
+                  (const char *restrict, char **restrict, int));
+# else
+#  if !@HAVE_DECL_STRTOIMAX@
+#   undef strtoimax
+_GL_FUNCDECL_SYS (strtoimax, intmax_t,
+                  (const char *restrict, char **restrict, int)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (strtoimax, intmax_t,
+                  (const char *restrict, char **restrict, int));
+# endif
+_GL_CXXALIASWARN (strtoimax);
+#elif defined GNULIB_POSIXCHECK
+# undef strtoimax
+# if HAVE_RAW_DECL_STRTOIMAX
+_GL_WARN_ON_USE (strtoimax, "strtoimax is unportable - "
+                 "use gnulib module strtoimax for portability");
+# endif
+#endif
+
+#if @GNULIB_STRTOUMAX@
+# if @REPLACE_STRTOUMAX@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef strtoumax
+#   define strtoumax rpl_strtoumax
+#  endif
+_GL_FUNCDECL_RPL (strtoumax, uintmax_t,
+                  (const char *restrict, char **restrict, int)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (strtoumax, uintmax_t,
+                  (const char *restrict, char **restrict, int));
+# else
+#  if !@HAVE_DECL_STRTOUMAX@
+#   undef strtoumax
+_GL_FUNCDECL_SYS (strtoumax, uintmax_t,
+                  (const char *restrict, char **restrict, int)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (strtoumax, uintmax_t,
+                  (const char *restrict, char **restrict, int));
+# endif
+_GL_CXXALIASWARN (strtoumax);
+#elif defined GNULIB_POSIXCHECK
+# undef strtoumax
+# if HAVE_RAW_DECL_STRTOUMAX
+_GL_WARN_ON_USE (strtoumax, "strtoumax is unportable - "
+                 "use gnulib module strtoumax for portability");
+# endif
+#endif
+
+/* Don't bother defining or declaring wcstoimax and wcstoumax, since
+   wide-character functions like this are hardly ever useful.  */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* !defined INTTYPES_H && !defined _GL_JUST_INCLUDE_SYSTEM_INTTYPES_H */
diff --git a/src/grep/lib/isatty.c b/src/grep/lib/isatty.c
new file mode 100644
index 0000000..74686d3
--- /dev/null
+++ b/src/grep/lib/isatty.c
@@ -0,0 +1,187 @@
+/* isatty() replacement.
+   Copyright (C) 2012-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+/* This replacement is enabled on native Windows.  */
+
+#include <errno.h>
+#include <string.h>
+
+/* Get declarations of the Win32 API functions.  */
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+# include "msvc-inval.h"
+#endif
+
+/* Get _get_osfhandle().  */
+#if GNULIB_MSVC_NOTHROW
+# include "msvc-nothrow.h"
+#else
+# include <io.h>
+#endif
+
+/* Don't assume that UNICODE is not defined.  */
+#undef LoadLibrary
+#define LoadLibrary LoadLibraryA
+#undef QueryFullProcessImageName
+#define QueryFullProcessImageName QueryFullProcessImageNameA
+
+#if !(_WIN32_WINNT >= _WIN32_WINNT_VISTA)
+
+/* Avoid warnings from gcc -Wcast-function-type.  */
+# define GetProcAddress \
+   (void *) GetProcAddress
+
+/* GetNamedPipeClientProcessId was introduced only in Windows Vista.  */
+typedef BOOL (WINAPI * GetNamedPipeClientProcessIdFuncType) (HANDLE hPipe,
+                                                             PULONG pClientProcessId);
+static GetNamedPipeClientProcessIdFuncType GetNamedPipeClientProcessIdFunc = NULL;
+/* QueryFullProcessImageName was introduced only in Windows Vista.  */
+typedef BOOL (WINAPI * QueryFullProcessImageNameFuncType) (HANDLE hProcess,
+                                                           DWORD dwFlags,
+                                                           LPSTR lpExeName,
+                                                           PDWORD pdwSize);
+static QueryFullProcessImageNameFuncType QueryFullProcessImageNameFunc = NULL;
+static BOOL initialized = FALSE;
+
+static void
+initialize (void)
+{
+  HMODULE kernel32 = LoadLibrary ("kernel32.dll");
+  if (kernel32 != NULL)
+    {
+      GetNamedPipeClientProcessIdFunc =
+        (GetNamedPipeClientProcessIdFuncType) GetProcAddress (kernel32, "GetNamedPipeClientProcessId");
+      QueryFullProcessImageNameFunc =
+        (QueryFullProcessImageNameFuncType) GetProcAddress (kernel32, "QueryFullProcessImageNameA");
+    }
+  initialized = TRUE;
+}
+
+#else
+
+# define GetNamedPipeClientProcessIdFunc GetNamedPipeClientProcessId
+# define QueryFullProcessImageNameFunc QueryFullProcessImageName
+
+#endif
+
+static BOOL IsConsoleHandle (HANDLE h)
+{
+  DWORD mode;
+  /* GetConsoleMode
+     <https://docs.microsoft.com/en-us/windows/console/getconsolemode> */
+  return GetConsoleMode (h, &mode) != 0;
+}
+
+static BOOL IsCygwinConsoleHandle (HANDLE h)
+{
+  /* A handle to a Cygwin console is in fact a named pipe whose client process
+     and server process is <CYGWIN_INSTALL_DIR>\bin\mintty.exe.  */
+  BOOL result = FALSE;
+  ULONG processId;
+
+#if !(_WIN32_WINNT >= _WIN32_WINNT_VISTA)
+  if (!initialized)
+    initialize ();
+#endif
+
+  /* GetNamedPipeClientProcessId
+     <https://docs.microsoft.com/en-us/windows/desktop/api/winbase/nf-winbase-getnamedpipeclientprocessid>
+     It requires -D_WIN32_WINNT=_WIN32_WINNT_VISTA or higher.  */
+  if (GetNamedPipeClientProcessIdFunc && QueryFullProcessImageNameFunc
+      && GetNamedPipeClientProcessIdFunc (h, &processId))
+    {
+      /* OpenProcess
+         <https://docs.microsoft.com/en-us/windows/desktop/api/processthreadsapi/nf-processthreadsapi-openprocess> */
+      HANDLE processHandle =
+        OpenProcess (PROCESS_QUERY_LIMITED_INFORMATION, FALSE, processId);
+      if (processHandle != NULL)
+        {
+          char buf[1024];
+          DWORD bufsize = sizeof (buf);
+          /* The file name can be determined through
+             GetProcessImageFileName
+             <https://docs.microsoft.com/en-us/windows/desktop/api/psapi/nf-psapi-getprocessimagefilenamea>
+             or
+             QueryFullProcessImageName
+             <https://docs.microsoft.com/en-us/windows/desktop/api/winbase/nf-winbase-queryfullprocessimagenamea>
+             The former returns a file name in non-standard notation (it starts
+             with '\Device\') and may require linking with psapi.dll.
+             The latter is better, but requires -D_WIN32_WINNT=_WIN32_WINNT_VISTA
+             or higher.  */
+          if (QueryFullProcessImageNameFunc (processHandle, 0, buf, &bufsize))
+            {
+              if (strlen (buf) >= 11
+                  && strcmp (buf + strlen (buf) - 11, "\\mintty.exe") == 0)
+                result = TRUE;
+            }
+          CloseHandle (processHandle);
+        }
+    }
+  return result;
+}
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+static int
+_isatty_nothrow (int fd)
+{
+  int result;
+
+  TRY_MSVC_INVAL
+    {
+      result = _isatty (fd);
+    }
+  CATCH_MSVC_INVAL
+    {
+      result = 0;
+    }
+  DONE_MSVC_INVAL;
+
+  return result;
+}
+#else
+# define _isatty_nothrow _isatty
+#endif
+
+/* Determine whether FD refers to a console device.  Return 1 if yes.
+   Return 0 and set errno if no. (ptsname_r relies on the errno value.)  */
+int
+isatty (int fd)
+{
+  HANDLE h = (HANDLE) _get_osfhandle (fd);
+  if (h == INVALID_HANDLE_VALUE)
+    {
+      errno = EBADF;
+      return 0;
+    }
+  /* _isatty (fd) tests whether GetFileType of the handle is FILE_TYPE_CHAR.
+     But it does not set errno when it returns 0.  */
+  if (_isatty_nothrow (fd))
+    {
+      if (IsConsoleHandle (h))
+        return 1;
+    }
+  if (IsCygwinConsoleHandle (h))
+    return 1;
+  errno = ENOTTY;
+  return 0;
+}
diff --git a/src/grep/lib/isblank.c b/src/grep/lib/isblank.c
new file mode 100644
index 0000000..8984f37
--- /dev/null
+++ b/src/grep/lib/isblank.c
@@ -0,0 +1,33 @@
+/* Test whether a character is a blank.
+
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <ctype.h>
+
+int
+isblank (int c)
+{
+  /* On all known platforms, in all predefined locales, isblank(c) is likely
+     equivalent with  (c == ' ' || c == '\t').  Look at the glibc definition
+     (in glibc/localedata/locales/i18n): The "blank" characters are '\t', ' ',
+     U+1680, U+180E, U+2000..U+2006, U+2008..U+200A, U+205F, U+3000, and none
+     except the first two is present in a common 8-bit encoding.  Therefore
+     the substitute for other platforms is not more complicated than this.  */
+  return (c == ' ' || c == '\t');
+}
diff --git a/src/grep/lib/iswblank.c b/src/grep/lib/iswblank.c
new file mode 100644
index 0000000..55628ec
--- /dev/null
+++ b/src/grep/lib/iswblank.c
@@ -0,0 +1,26 @@
+/* Test wide character for being blank.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <wctype.h>
+
+int
+iswblank (wint_t wc)
+{
+  return wc == ' ' || wc == '\t';
+}
diff --git a/src/grep/lib/iswctype-impl.h b/src/grep/lib/iswctype-impl.h
new file mode 100644
index 0000000..c3a2508
--- /dev/null
+++ b/src/grep/lib/iswctype-impl.h
@@ -0,0 +1,22 @@
+/* Test whether a wide character has a given property.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2011.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+int
+iswctype (wint_t wc, wctype_t desc)
+{
+  return ((int (*) (wint_t)) desc) (wc);
+}
diff --git a/src/grep/lib/iswctype.c b/src/grep/lib/iswctype.c
new file mode 100644
index 0000000..3e833c5
--- /dev/null
+++ b/src/grep/lib/iswctype.c
@@ -0,0 +1,36 @@
+/* Test whether a wide character has a given property.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2011.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <wctype.h>
+
+#if GNULIB_defined_wint_t
+
+int
+iswctype (wint_t wc, wctype_t desc)
+# undef iswctype
+{
+  return ((wchar_t) wc == wc ? iswctype ((wchar_t) wc, desc) : 0);
+}
+
+#else
+
+# include "iswctype-impl.h"
+
+#endif
diff --git a/src/grep/lib/iswdigit.c b/src/grep/lib/iswdigit.c
new file mode 100644
index 0000000..8ec9a6e
--- /dev/null
+++ b/src/grep/lib/iswdigit.c
@@ -0,0 +1,26 @@
+/* Test wide character for being a digit.
+   Copyright (C) 2020-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <wctype.h>
+
+int
+iswdigit (wint_t wc)
+{
+  return wc >= '0' && wc <= '9';
+}
diff --git a/src/grep/lib/iswxdigit.c b/src/grep/lib/iswxdigit.c
new file mode 100644
index 0000000..fcdcdba
--- /dev/null
+++ b/src/grep/lib/iswxdigit.c
@@ -0,0 +1,33 @@
+/* Test wide character for being a hexadecimal digit.
+   Copyright (C) 2020-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <wctype.h>
+
+int
+iswxdigit (wint_t wc)
+{
+  return ((wc >= '0' && wc <= '9')
+#if 'A' == 0x41 && 'a' == 0x61
+          /* Optimization, assuming ASCII */
+          || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'F')
+#else
+          || (wc >= 'A' && wc <= 'F') || (wc >= 'a' && wc <= 'f')
+#endif
+         );
+}
diff --git a/src/grep/lib/langinfo.in.h b/src/grep/lib/langinfo.in.h
new file mode 100644
index 0000000..4873899
--- /dev/null
+++ b/src/grep/lib/langinfo.in.h
@@ -0,0 +1,222 @@
+/* Substitute for and wrapper around <langinfo.h>.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/*
+ * POSIX <langinfo.h> for platforms that lack it or have an incomplete one.
+ * <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/langinfo.h.html>
+ */
+
+#ifndef _@GUARD_PREFIX@_LANGINFO_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard.  */
+#if @HAVE_LANGINFO_H@
+# @INCLUDE_NEXT@ @NEXT_LANGINFO_H@
+#endif
+
+#ifndef _@GUARD_PREFIX@_LANGINFO_H
+#define _@GUARD_PREFIX@_LANGINFO_H
+
+
+#if !@HAVE_LANGINFO_H@
+
+/* A platform that lacks <langinfo.h>.  */
+
+/* Assume that it also lacks <nl_types.h> and the nl_item type.  */
+# if !GNULIB_defined_nl_item
+typedef int nl_item;
+#  define GNULIB_defined_nl_item 1
+# endif
+
+/* nl_langinfo items of the LC_CTYPE category */
+# define CODESET     10000
+/* nl_langinfo items of the LC_NUMERIC category */
+# define RADIXCHAR   10001
+# define DECIMAL_POINT RADIXCHAR
+# define THOUSEP     10002
+# define THOUSANDS_SEP THOUSEP
+# define GROUPING    10114
+/* nl_langinfo items of the LC_TIME category */
+# define D_T_FMT     10003
+# define D_FMT       10004
+# define T_FMT       10005
+# define T_FMT_AMPM  10006
+# define AM_STR      10007
+# define PM_STR      10008
+# define DAY_1       10009
+# define DAY_2       (DAY_1 + 1)
+# define DAY_3       (DAY_1 + 2)
+# define DAY_4       (DAY_1 + 3)
+# define DAY_5       (DAY_1 + 4)
+# define DAY_6       (DAY_1 + 5)
+# define DAY_7       (DAY_1 + 6)
+# define ABDAY_1     10016
+# define ABDAY_2     (ABDAY_1 + 1)
+# define ABDAY_3     (ABDAY_1 + 2)
+# define ABDAY_4     (ABDAY_1 + 3)
+# define ABDAY_5     (ABDAY_1 + 4)
+# define ABDAY_6     (ABDAY_1 + 5)
+# define ABDAY_7     (ABDAY_1 + 6)
+# define MON_1       10023
+# define MON_2       (MON_1 + 1)
+# define MON_3       (MON_1 + 2)
+# define MON_4       (MON_1 + 3)
+# define MON_5       (MON_1 + 4)
+# define MON_6       (MON_1 + 5)
+# define MON_7       (MON_1 + 6)
+# define MON_8       (MON_1 + 7)
+# define MON_9       (MON_1 + 8)
+# define MON_10      (MON_1 + 9)
+# define MON_11      (MON_1 + 10)
+# define MON_12      (MON_1 + 11)
+# define ALTMON_1    10200
+# define ALTMON_2    (ALTMON_1 + 1)
+# define ALTMON_3    (ALTMON_1 + 2)
+# define ALTMON_4    (ALTMON_1 + 3)
+# define ALTMON_5    (ALTMON_1 + 4)
+# define ALTMON_6    (ALTMON_1 + 5)
+# define ALTMON_7    (ALTMON_1 + 6)
+# define ALTMON_8    (ALTMON_1 + 7)
+# define ALTMON_9    (ALTMON_1 + 8)
+# define ALTMON_10   (ALTMON_1 + 9)
+# define ALTMON_11   (ALTMON_1 + 10)
+# define ALTMON_12   (ALTMON_1 + 11)
+# define ABMON_1     10035
+# define ABMON_2     (ABMON_1 + 1)
+# define ABMON_3     (ABMON_1 + 2)
+# define ABMON_4     (ABMON_1 + 3)
+# define ABMON_5     (ABMON_1 + 4)
+# define ABMON_6     (ABMON_1 + 5)
+# define ABMON_7     (ABMON_1 + 6)
+# define ABMON_8     (ABMON_1 + 7)
+# define ABMON_9     (ABMON_1 + 8)
+# define ABMON_10    (ABMON_1 + 9)
+# define ABMON_11    (ABMON_1 + 10)
+# define ABMON_12    (ABMON_1 + 11)
+# define ERA         10047
+# define ERA_D_FMT   10048
+# define ERA_D_T_FMT 10049
+# define ERA_T_FMT   10050
+# define ALT_DIGITS  10051
+/* nl_langinfo items of the LC_MONETARY category */
+# define CRNCYSTR    10052
+# define CURRENCY_SYMBOL   CRNCYSTR
+# define INT_CURR_SYMBOL   10100
+# define MON_DECIMAL_POINT 10101
+# define MON_THOUSANDS_SEP 10102
+# define MON_GROUPING      10103
+# define POSITIVE_SIGN     10104
+# define NEGATIVE_SIGN     10105
+# define FRAC_DIGITS       10106
+# define INT_FRAC_DIGITS   10107
+# define P_CS_PRECEDES     10108
+# define N_CS_PRECEDES     10109
+# define P_SEP_BY_SPACE    10110
+# define N_SEP_BY_SPACE    10111
+# define P_SIGN_POSN       10112
+# define N_SIGN_POSN       10113
+/* nl_langinfo items of the LC_MESSAGES category */
+# define YESEXPR     10053
+# define NOEXPR      10054
+
+#else
+
+/* A platform that has <langinfo.h>.  */
+
+# if !@HAVE_LANGINFO_CODESET@
+#  define CODESET     10000
+#  define GNULIB_defined_CODESET 1
+# endif
+
+# if !@HAVE_LANGINFO_T_FMT_AMPM@
+#  define T_FMT_AMPM  10006
+#  define GNULIB_defined_T_FMT_AMPM 1
+# endif
+
+# if !@HAVE_LANGINFO_ALTMON@
+#  define ALTMON_1    10200
+#  define ALTMON_2    (ALTMON_1 + 1)
+#  define ALTMON_3    (ALTMON_1 + 2)
+#  define ALTMON_4    (ALTMON_1 + 3)
+#  define ALTMON_5    (ALTMON_1 + 4)
+#  define ALTMON_6    (ALTMON_1 + 5)
+#  define ALTMON_7    (ALTMON_1 + 6)
+#  define ALTMON_8    (ALTMON_1 + 7)
+#  define ALTMON_9    (ALTMON_1 + 8)
+#  define ALTMON_10   (ALTMON_1 + 9)
+#  define ALTMON_11   (ALTMON_1 + 10)
+#  define ALTMON_12   (ALTMON_1 + 11)
+#  define GNULIB_defined_ALTMON 1
+# endif
+
+# if !@HAVE_LANGINFO_ERA@
+#  define ERA         10047
+#  define ERA_D_FMT   10048
+#  define ERA_D_T_FMT 10049
+#  define ERA_T_FMT   10050
+#  define ALT_DIGITS  10051
+#  define GNULIB_defined_ERA 1
+# endif
+
+# if !@HAVE_LANGINFO_YESEXPR@
+#  define YESEXPR     10053
+#  define NOEXPR      10054
+#  define GNULIB_defined_YESEXPR 1
+# endif
+
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+/* Declare overridden functions.  */
+
+
+/* Return a piece of locale dependent information.
+   Note: The difference between nl_langinfo (CODESET) and locale_charset ()
+   is that the latter normalizes the encoding names to GNU conventions.  */
+
+#if @GNULIB_NL_LANGINFO@
+# if @REPLACE_NL_LANGINFO@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef nl_langinfo
+#   define nl_langinfo rpl_nl_langinfo
+#  endif
+_GL_FUNCDECL_RPL (nl_langinfo, char *, (nl_item item));
+_GL_CXXALIAS_RPL (nl_langinfo, char *, (nl_item item));
+# else
+#  if !@HAVE_NL_LANGINFO@
+_GL_FUNCDECL_SYS (nl_langinfo, char *, (nl_item item));
+#  endif
+_GL_CXXALIAS_SYS (nl_langinfo, char *, (nl_item item));
+# endif
+_GL_CXXALIASWARN (nl_langinfo);
+#elif defined GNULIB_POSIXCHECK
+# undef nl_langinfo
+# if HAVE_RAW_DECL_NL_LANGINFO
+_GL_WARN_ON_USE (nl_langinfo, "nl_langinfo is not portable - "
+                 "use gnulib module nl_langinfo for portability");
+# endif
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_LANGINFO_H */
+#endif /* _@GUARD_PREFIX@_LANGINFO_H */
diff --git a/src/grep/lib/lc-charset-dispatch.c b/src/grep/lib/lc-charset-dispatch.c
new file mode 100644
index 0000000..88a0bd3
--- /dev/null
+++ b/src/grep/lib/lc-charset-dispatch.c
@@ -0,0 +1,82 @@
+/* Dispatching based on the current locale's character encoding.
+   Copyright (C) 2018-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2018.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "lc-charset-dispatch.h"
+
+#if GNULIB_defined_mbstate_t
+
+# include "localcharset.h"
+# include "streq.h"
+
+# if GNULIB_WCHAR_SINGLE_LOCALE
+/* When we know that the locale does not change, provide a speedup by
+   caching the value of locale_encoding_classification.  */
+#  define locale_encoding_classification_cached locale_encoding_classification
+# else
+/* By default, don't make assumptions, hence no caching.  */
+#  define locale_encoding_classification_uncached locale_encoding_classification
+# endif
+
+# if GNULIB_WCHAR_SINGLE_LOCALE
+static inline
+# endif
+enc_t
+locale_encoding_classification_uncached (void)
+{
+  const char *encoding = locale_charset ();
+  if (STREQ_OPT (encoding, "UTF-8", 'U', 'T', 'F', '-', '8', 0, 0, 0, 0))
+    return enc_utf8;
+  if (STREQ_OPT (encoding, "EUC-JP", 'E', 'U', 'C', '-', 'J', 'P', 0, 0, 0))
+    return enc_eucjp;
+  if (STREQ_OPT (encoding, "EUC-KR", 'E', 'U', 'C', '-', 'K', 'R', 0, 0, 0)
+      || STREQ_OPT (encoding, "GB2312", 'G', 'B', '2', '3', '1', '2', 0, 0, 0)
+      || STREQ_OPT (encoding, "BIG5", 'B', 'I', 'G', '5', 0, 0, 0, 0, 0))
+    return enc_94;
+  if (STREQ_OPT (encoding, "EUC-TW", 'E', 'U', 'C', '-', 'T', 'W', 0, 0, 0))
+    return enc_euctw;
+  if (STREQ_OPT (encoding, "GB18030", 'G', 'B', '1', '8', '0', '3', '0', 0, 0))
+    return enc_gb18030;
+  if (STREQ_OPT (encoding, "SJIS", 'S', 'J', 'I', 'S', 0, 0, 0, 0, 0))
+    return enc_sjis;
+  return enc_other;
+}
+
+# if GNULIB_WCHAR_SINGLE_LOCALE
+
+static int cached_locale_enc = -1;
+
+enc_t
+locale_encoding_classification_cached (void)
+{
+  if (cached_locale_enc < 0)
+    cached_locale_enc = locale_encoding_classification_uncached ();
+  return cached_locale_enc;
+}
+
+# endif
+
+#else
+
+/* This declaration is solely to ensure that after preprocessing
+   this file is never empty.  */
+typedef int dummy;
+
+#endif
diff --git a/src/grep/lib/lc-charset-dispatch.h b/src/grep/lib/lc-charset-dispatch.h
new file mode 100644
index 0000000..59b485d
--- /dev/null
+++ b/src/grep/lib/lc-charset-dispatch.h
@@ -0,0 +1,40 @@
+/* Dispatching based on the current locale's character encoding.
+   Copyright (C) 2018-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2018.  */
+
+#include <wchar.h>
+
+#if GNULIB_defined_mbstate_t
+
+/* A classification of special values of the encoding of the current locale.  */
+typedef enum
+  {
+    enc_other,      /* other */
+    enc_utf8,       /* UTF-8 */
+    enc_eucjp,      /* EUC-JP */
+    enc_94,         /* EUC-KR, GB2312, BIG5 */
+    enc_euctw,      /* EUC-TW */
+    enc_gb18030,    /* GB18030 */
+    enc_sjis        /* SJIS */
+  }
+  enc_t;
+
+/* Returns a classification of special values of the encoding of the current
+   locale.  */
+extern enc_t locale_encoding_classification (void);
+
+#endif
diff --git a/src/grep/lib/libc-config.h b/src/grep/lib/libc-config.h
new file mode 100644
index 0000000..f68749f
--- /dev/null
+++ b/src/grep/lib/libc-config.h
@@ -0,0 +1,188 @@
+/* System definitions for code taken from the GNU C Library
+
+   Copyright 2017-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this program; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+/* This is intended to be a good-enough substitute for glibc system
+   macros like those defined in <sys/cdefs.h>, so that Gnulib code
+   shared with glibc can do this as the first #include:
+
+     #ifndef _LIBC
+     # include <libc-config.h>
+     #endif
+
+   When compiled as part of glibc this is a no-op; when compiled as
+   part of Gnulib this includes Gnulib's <config.h> and defines macros
+   that glibc library code would normally assume.
+
+   Note: This header file MUST NOT be included by public header files
+   of Gnulib.  */
+
+#include <config.h>
+
+/* On glibc this includes <features.h> and <sys/cdefs.h> and #defines
+   _FEATURES_H, __WORDSIZE, and __set_errno.  On FreeBSD 11 and
+   DragonFlyBSD 5.9 it includes <sys/cdefs.h> which defines __nonnull.
+   Elsewhere it is harmless.  */
+#include <errno.h>
+
+/* From glibc <errno.h>.  */
+#ifndef __set_errno
+# define __set_errno(val) (errno = (val))
+#endif
+
+/* From glibc <features.h>.  */
+
+#ifndef __GNUC_PREREQ
+# if defined __GNUC__ && defined __GNUC_MINOR__
+#  define __GNUC_PREREQ(maj, min) ((maj) < __GNUC__ + ((min) <= __GNUC_MINOR__))
+# else
+#  define __GNUC_PREREQ(maj, min) 0
+# endif
+#endif
+
+#ifndef __glibc_clang_prereq
+# if defined __clang_major__ && defined __clang_minor__
+#  ifdef __apple_build_version__
+/* Apple for some reason renumbers __clang_major__ and __clang_minor__.
+   Gnulib code uses only __glibc_clang_prereq (3, 5); map it to
+   6000000 <= __apple_build_version__.  Support for other calls to
+   __glibc_clang_prereq can be added here as needed.  */
+#   define __glibc_clang_prereq(maj, min) \
+      ((maj) == 3 && (min) == 5 ? 6000000 <= __apple_build_version__ : 0)
+#  else
+#   define __glibc_clang_prereq(maj, min) \
+      ((maj) < __clang_major__ + ((min) <= __clang_minor__))
+#  endif
+# else
+#  define __glibc_clang_prereq(maj, min) 0
+# endif
+#endif
+
+#ifndef __attribute_nonnull__
+/* <sys/cdefs.h> either does not exist, or is too old for Gnulib.
+   Prepare to include <cdefs.h>, which is Gnulib's version of a
+   more-recent glibc <sys/cdefs.h>.  */
+
+/* Define _FEATURES_H so that <cdefs.h> does not include <features.h>.  */
+# ifndef _FEATURES_H
+#  define _FEATURES_H 1
+# endif
+/* Define __GNULIB_CDEFS so that <cdefs.h> does not attempt to include
+   nonexistent files.  */
+# define __GNULIB_CDEFS
+/* Undef the macros unconditionally defined by our copy of glibc
+   <sys/cdefs.h>, so that they do not clash with any system-defined
+   versions.  */
+# undef _SYS_CDEFS_H
+# undef __ASMNAME
+# undef __ASMNAME2
+# undef __BEGIN_DECLS
+# undef __CONCAT
+# undef __END_DECLS
+# undef __HAVE_GENERIC_SELECTION
+# undef __LDBL_COMPAT
+# undef __LDBL_REDIR
+# undef __LDBL_REDIR1
+# undef __LDBL_REDIR1_DECL
+# undef __LDBL_REDIR1_NTH
+# undef __LDBL_REDIR2_DECL
+# undef __LDBL_REDIR_DECL
+# undef __LDBL_REDIR_NTH
+# undef __LEAF
+# undef __LEAF_ATTR
+# undef __NTH
+# undef __NTHNL
+# undef __REDIRECT
+# undef __REDIRECT_LDBL
+# undef __REDIRECT_NTH
+# undef __REDIRECT_NTHNL
+# undef __REDIRECT_NTH_LDBL
+# undef __STRING
+# undef __THROW
+# undef __THROWNL
+# undef __attr_access
+# undef __attribute__
+# undef __attribute_alloc_size__
+# undef __attribute_artificial__
+# undef __attribute_const__
+# undef __attribute_deprecated__
+# undef __attribute_deprecated_msg__
+# undef __attribute_format_arg__
+# undef __attribute_format_strfmon__
+# undef __attribute_malloc__
+# undef __attribute_noinline__
+# undef __attribute_nonstring__
+# undef __attribute_pure__
+# undef __attribute_returns_twice__
+# undef __attribute_used__
+# undef __attribute_warn_unused_result__
+# undef __bos
+# undef __bos0
+# undef __errordecl
+# undef __extension__
+# undef __extern_always_inline
+# undef __extern_inline
+# undef __flexarr
+# undef __fortify_function
+# undef __glibc_c99_flexarr_available
+# undef __glibc_has_attribute
+# undef __glibc_has_builtin
+# undef __glibc_has_extension
+# undef __glibc_macro_warning
+# undef __glibc_macro_warning1
+# undef __glibc_objsize
+# undef __glibc_objsize0
+# undef __glibc_unlikely
+# undef __inline
+# undef __ptr_t
+# undef __restrict
+# undef __restrict_arr
+# undef __va_arg_pack
+# undef __va_arg_pack_len
+# undef __warnattr
+
+/* Include our copy of glibc <sys/cdefs.h>.  */
+# include <cdefs.h>
+
+/* <cdefs.h> __inline is too pessimistic for non-GCC.  */
+# undef __inline
+# ifndef HAVE___INLINE
+#  if 199901 <= __STDC_VERSION__ || defined inline
+#   define __inline inline
+#  else
+#   define __inline
+#  endif
+# endif
+
+#endif /* defined __glibc_likely */
+
+
+/* A substitute for glibc <libc-symbols.h>, good enough for Gnulib.  */
+#define attribute_hidden
+#define libc_hidden_proto(name)
+#define libc_hidden_def(name)
+#define libc_hidden_weak(name)
+#define libc_hidden_ver(local, name)
+#define strong_alias(name, aliasname)
+#define weak_alias(name, aliasname)
+
+/* A substitute for glibc <shlib-compat.h>, good enough for Gnulib.  */
+#define SHLIB_COMPAT(lib, introduced, obsoleted) 0
+#define compat_symbol(lib, local, symbol, version) extern int dummy
+#define versioned_symbol(lib, local, symbol, version) extern int dummy
diff --git a/src/grep/lib/limits.in.h b/src/grep/lib/limits.in.h
new file mode 100644
index 0000000..2ecafeb
--- /dev/null
+++ b/src/grep/lib/limits.in.h
@@ -0,0 +1,131 @@
+/* A GNU-like <limits.h>.
+
+   Copyright 2016-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if defined _GL_ALREADY_INCLUDING_LIMITS_H
+/* Special invocation convention:
+   On Haiku/x86_64, we have a sequence of nested includes
+   <limits.h> -> <syslimits.h> -> <limits.h>.
+   In this situation, LONG_MAX and INT_MAX are not yet defined,
+   therefore we should not attempt to define LONG_BIT.  */
+
+#@INCLUDE_NEXT@ @NEXT_LIMITS_H@
+
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_LIMITS_H
+
+# define _GL_ALREADY_INCLUDING_LIMITS_H
+
+/* The include_next requires a split double-inclusion guard.  */
+# @INCLUDE_NEXT@ @NEXT_LIMITS_H@
+
+# undef _GL_ALREADY_INCLUDING_LIMITS_H
+
+#ifndef _@GUARD_PREFIX@_LIMITS_H
+#define _@GUARD_PREFIX@_LIMITS_H
+
+#ifndef LLONG_MIN
+# if defined LONG_LONG_MIN /* HP-UX 11.31 */
+#  define LLONG_MIN LONG_LONG_MIN
+# elif defined LONGLONG_MIN /* IRIX 6.5 */
+#  define LLONG_MIN LONGLONG_MIN
+# elif defined __GNUC__
+#  define LLONG_MIN (- __LONG_LONG_MAX__ - 1LL)
+# endif
+#endif
+#ifndef LLONG_MAX
+# if defined LONG_LONG_MAX /* HP-UX 11.31 */
+#  define LLONG_MAX LONG_LONG_MAX
+# elif defined LONGLONG_MAX /* IRIX 6.5 */
+#  define LLONG_MAX LONGLONG_MAX
+# elif defined __GNUC__
+#  define LLONG_MAX __LONG_LONG_MAX__
+# endif
+#endif
+#ifndef ULLONG_MAX
+# if defined ULONG_LONG_MAX /* HP-UX 11.31 */
+#  define ULLONG_MAX ULONG_LONG_MAX
+# elif defined ULONGLONG_MAX /* IRIX 6.5 */
+#  define ULLONG_MAX ULONGLONG_MAX
+# elif defined __GNUC__
+#  define ULLONG_MAX (__LONG_LONG_MAX__ * 2ULL + 1ULL)
+# endif
+#endif
+
+/* The number of usable bits in an unsigned or signed integer type
+   with minimum value MIN and maximum value MAX, as an int expression
+   suitable in #if.  Cover all known practical hosts.  This
+   implementation exploits the fact that MAX is 1 less than a power of
+   2, and merely counts the number of 1 bits in MAX; "COBn" means
+   "count the number of 1 bits in the low-order n bits").  */
+#define _GL_INTEGER_WIDTH(min, max) (((min) < 0) + _GL_COB128 (max))
+#define _GL_COB128(n) (_GL_COB64 ((n) >> 31 >> 31 >> 2) + _GL_COB64 (n))
+#define _GL_COB64(n) (_GL_COB32 ((n) >> 31 >> 1) + _GL_COB32 (n))
+#define _GL_COB32(n) (_GL_COB16 ((n) >> 16) + _GL_COB16 (n))
+#define _GL_COB16(n) (_GL_COB8 ((n) >> 8) + _GL_COB8 (n))
+#define _GL_COB8(n) (_GL_COB4 ((n) >> 4) + _GL_COB4 (n))
+#define _GL_COB4(n) (!!((n) & 8) + !!((n) & 4) + !!((n) & 2) + !!((n) & 1))
+
+#ifndef WORD_BIT
+/* Assume 'int' is 32 bits wide.  */
+# define WORD_BIT 32
+#endif
+#ifndef LONG_BIT
+/* Assume 'long' is 32 or 64 bits wide.  */
+# if LONG_MAX == INT_MAX
+#  define LONG_BIT 32
+# else
+#  define LONG_BIT 64
+# endif
+#endif
+
+/* Macros specified by C2x and by ISO/IEC TS 18661-1:2014.  */
+
+#if (! defined ULLONG_WIDTH                                             \
+     && (defined _GNU_SOURCE || defined __STDC_WANT_IEC_60559_BFP_EXT__ \
+         || (defined __STDC_VERSION__ && 201710 < __STDC_VERSION__)))
+# define CHAR_WIDTH _GL_INTEGER_WIDTH (CHAR_MIN, CHAR_MAX)
+# define SCHAR_WIDTH _GL_INTEGER_WIDTH (SCHAR_MIN, SCHAR_MAX)
+# define UCHAR_WIDTH _GL_INTEGER_WIDTH (0, UCHAR_MAX)
+# define SHRT_WIDTH _GL_INTEGER_WIDTH (SHRT_MIN, SHRT_MAX)
+# define USHRT_WIDTH _GL_INTEGER_WIDTH (0, USHRT_MAX)
+# define INT_WIDTH _GL_INTEGER_WIDTH (INT_MIN, INT_MAX)
+# define UINT_WIDTH _GL_INTEGER_WIDTH (0, UINT_MAX)
+# define LONG_WIDTH _GL_INTEGER_WIDTH (LONG_MIN, LONG_MAX)
+# define ULONG_WIDTH _GL_INTEGER_WIDTH (0, ULONG_MAX)
+# define LLONG_WIDTH _GL_INTEGER_WIDTH (LLONG_MIN, LLONG_MAX)
+# define ULLONG_WIDTH _GL_INTEGER_WIDTH (0, ULLONG_MAX)
+#endif
+
+/* Macros specified by C2x.  */
+
+#if (! defined BOOL_WIDTH \
+     && (defined _GNU_SOURCE \
+         || (defined __STDC_VERSION__ && 201710 < __STDC_VERSION__)))
+# define BOOL_MAX 1
+# define BOOL_WIDTH 1
+#endif
+
+#endif /* _@GUARD_PREFIX@_LIMITS_H */
+#endif /* _@GUARD_PREFIX@_LIMITS_H */
+#endif
diff --git a/src/grep/lib/localcharset.c b/src/grep/lib/localcharset.c
new file mode 100644
index 0000000..3c50858
--- /dev/null
+++ b/src/grep/lib/localcharset.c
@@ -0,0 +1,1159 @@
+/* Determine a canonical name for the current locale's character encoding.
+
+   Copyright (C) 2000-2006, 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "localcharset.h"
+
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#if defined __APPLE__ && defined __MACH__ && HAVE_LANGINFO_CODESET
+# define DARWIN7 /* Darwin 7 or newer, i.e. Mac OS X 10.3 or newer */
+#endif
+
+#if defined _WIN32 && !defined __CYGWIN__
+# define WINDOWS_NATIVE
+# include <locale.h>
+#endif
+
+#if defined __EMX__
+/* Assume EMX program runs on OS/2, even if compiled under DOS.  */
+# ifndef OS2
+#  define OS2
+# endif
+#endif
+
+#if !defined WINDOWS_NATIVE
+# if HAVE_LANGINFO_CODESET
+#  include <langinfo.h>
+# else
+#  if 0 /* see comment regarding use of setlocale(), below */
+#   include <locale.h>
+#  endif
+# endif
+# ifdef __CYGWIN__
+#  define WIN32_LEAN_AND_MEAN
+#  include <windows.h>
+# endif
+#elif defined WINDOWS_NATIVE
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+  /* For the use of setlocale() below, the Gnulib override in setlocale.c is
+     not needed; see the platform lists in setlocale_null.m4.  */
+# undef setlocale
+#endif
+#if defined OS2
+# define INCL_DOS
+# include <os2.h>
+#endif
+
+/* For MB_CUR_MAX_L */
+#if defined DARWIN7
+# include <xlocale.h>
+#endif
+
+
+#if HAVE_LANGINFO_CODESET || defined WINDOWS_NATIVE || defined OS2
+
+/* On these platforms, we use a mapping from non-canonical encoding name
+   to GNU canonical encoding name.  */
+
+/* With glibc-2.1 or newer, we don't need any canonicalization,
+   because glibc has iconv and both glibc and libiconv support all
+   GNU canonical names directly.  */
+# if !((defined __GNU_LIBRARY__ && __GLIBC__ >= 2) || defined __UCLIBC__)
+
+struct table_entry
+{
+  const char alias[11+1];
+  const char canonical[11+1];
+};
+
+/* Table of platform-dependent mappings, sorted in ascending order.  */
+static const struct table_entry alias_table[] =
+  {
+#  if defined __FreeBSD__                                   /* FreeBSD */
+  /*{ "ARMSCII-8",  "ARMSCII-8" },*/
+    { "Big5",       "BIG5" },
+    { "C",          "ASCII" },
+  /*{ "CP1131",     "CP1131" },*/
+  /*{ "CP1251",     "CP1251" },*/
+  /*{ "CP866",      "CP866" },*/
+  /*{ "GB18030",    "GB18030" },*/
+  /*{ "GB2312",     "GB2312" },*/
+  /*{ "GBK",        "GBK" },*/
+  /*{ "ISCII-DEV",  "?" },*/
+    { "ISO8859-1",  "ISO-8859-1" },
+    { "ISO8859-13", "ISO-8859-13" },
+    { "ISO8859-15", "ISO-8859-15" },
+    { "ISO8859-2",  "ISO-8859-2" },
+    { "ISO8859-5",  "ISO-8859-5" },
+    { "ISO8859-7",  "ISO-8859-7" },
+    { "ISO8859-9",  "ISO-8859-9" },
+  /*{ "KOI8-R",     "KOI8-R" },*/
+  /*{ "KOI8-U",     "KOI8-U" },*/
+    { "SJIS",       "SHIFT_JIS" },
+    { "US-ASCII",   "ASCII" },
+    { "eucCN",      "GB2312" },
+    { "eucJP",      "EUC-JP" },
+    { "eucKR",      "EUC-KR" }
+#   define alias_table_defined
+#  endif
+#  if defined __NetBSD__                                    /* NetBSD */
+    { "646",        "ASCII" },
+  /*{ "ARMSCII-8",  "ARMSCII-8" },*/
+  /*{ "BIG5",       "BIG5" },*/
+    { "Big5-HKSCS", "BIG5-HKSCS" },
+  /*{ "CP1251",     "CP1251" },*/
+  /*{ "CP866",      "CP866" },*/
+  /*{ "GB18030",    "GB18030" },*/
+  /*{ "GB2312",     "GB2312" },*/
+    { "ISO8859-1",  "ISO-8859-1" },
+    { "ISO8859-13", "ISO-8859-13" },
+    { "ISO8859-15", "ISO-8859-15" },
+    { "ISO8859-2",  "ISO-8859-2" },
+    { "ISO8859-4",  "ISO-8859-4" },
+    { "ISO8859-5",  "ISO-8859-5" },
+    { "ISO8859-7",  "ISO-8859-7" },
+  /*{ "KOI8-R",     "KOI8-R" },*/
+  /*{ "KOI8-U",     "KOI8-U" },*/
+  /*{ "PT154",      "PT154" },*/
+    { "SJIS",       "SHIFT_JIS" },
+    { "eucCN",      "GB2312" },
+    { "eucJP",      "EUC-JP" },
+    { "eucKR",      "EUC-KR" },
+    { "eucTW",      "EUC-TW" }
+#   define alias_table_defined
+#  endif
+#  if defined __OpenBSD__                                   /* OpenBSD */
+    { "646",        "ASCII" },
+    { "ISO8859-1",  "ISO-8859-1" },
+    { "ISO8859-13", "ISO-8859-13" },
+    { "ISO8859-15", "ISO-8859-15" },
+    { "ISO8859-2",  "ISO-8859-2" },
+    { "ISO8859-4",  "ISO-8859-4" },
+    { "ISO8859-5",  "ISO-8859-5" },
+    { "ISO8859-7",  "ISO-8859-7" },
+    { "US-ASCII",   "ASCII" }
+#   define alias_table_defined
+#  endif
+#  if defined __APPLE__ && defined __MACH__                 /* Mac OS X */
+    /* Darwin 7.5 has nl_langinfo(CODESET), but sometimes its value is
+       useless:
+       - It returns the empty string when LANG is set to a locale of the
+         form ll_CC, although ll_CC/LC_CTYPE is a symlink to an UTF-8
+         LC_CTYPE file.
+       - The environment variables LANG, LC_CTYPE, LC_ALL are not set by
+         the system; nl_langinfo(CODESET) returns "US-ASCII" in this case.
+       - The documentation says:
+           "... all code that calls BSD system routines should ensure
+            that the const *char parameters of these routines are in UTF-8
+            encoding. All BSD system functions expect their string
+            parameters to be in UTF-8 encoding and nothing else."
+         It also says
+           "An additional caveat is that string parameters for files,
+            paths, and other file-system entities must be in canonical
+            UTF-8. In a canonical UTF-8 Unicode string, all decomposable
+            characters are decomposed ..."
+         but this is not true: You can pass non-decomposed UTF-8 strings
+         to file system functions, and it is the OS which will convert
+         them to decomposed UTF-8 before accessing the file system.
+       - The Apple Terminal application displays UTF-8 by default.
+       - However, other applications are free to use different encodings:
+         - xterm uses ISO-8859-1 by default.
+         - TextEdit uses MacRoman by default.
+       We prefer UTF-8 over decomposed UTF-8-MAC because one should
+       minimize the use of decomposed Unicode. Unfortunately, through the
+       Darwin file system, decomposed UTF-8 strings are leaked into user
+       space nevertheless.
+       Then there are also the locales with encodings other than US-ASCII
+       and UTF-8. These locales can be occasionally useful to users (e.g.
+       when grepping through ISO-8859-1 encoded text files), when all their
+       file names are in US-ASCII.
+     */
+    { "ARMSCII-8",  "ARMSCII-8" },
+    { "Big5",       "BIG5" },
+    { "Big5HKSCS",  "BIG5-HKSCS" },
+    { "CP1131",     "CP1131" },
+    { "CP1251",     "CP1251" },
+    { "CP866",      "CP866" },
+    { "CP949",      "CP949" },
+    { "GB18030",    "GB18030" },
+    { "GB2312",     "GB2312" },
+    { "GBK",        "GBK" },
+  /*{ "ISCII-DEV",  "?" },*/
+    { "ISO8859-1",  "ISO-8859-1" },
+    { "ISO8859-13", "ISO-8859-13" },
+    { "ISO8859-15", "ISO-8859-15" },
+    { "ISO8859-2",  "ISO-8859-2" },
+    { "ISO8859-4",  "ISO-8859-4" },
+    { "ISO8859-5",  "ISO-8859-5" },
+    { "ISO8859-7",  "ISO-8859-7" },
+    { "ISO8859-9",  "ISO-8859-9" },
+    { "KOI8-R",     "KOI8-R" },
+    { "KOI8-U",     "KOI8-U" },
+    { "PT154",      "PT154" },
+    { "SJIS",       "SHIFT_JIS" },
+    { "eucCN",      "GB2312" },
+    { "eucJP",      "EUC-JP" },
+    { "eucKR",      "EUC-KR" }
+#   define alias_table_defined
+#  endif
+#  if defined _AIX                                          /* AIX */
+  /*{ "GBK",        "GBK" },*/
+    { "IBM-1046",   "CP1046" },
+    { "IBM-1124",   "CP1124" },
+    { "IBM-1129",   "CP1129" },
+    { "IBM-1252",   "CP1252" },
+    { "IBM-850",    "CP850" },
+    { "IBM-856",    "CP856" },
+    { "IBM-921",    "ISO-8859-13" },
+    { "IBM-922",    "CP922" },
+    { "IBM-932",    "CP932" },
+    { "IBM-943",    "CP943" },
+    { "IBM-eucCN",  "GB2312" },
+    { "IBM-eucJP",  "EUC-JP" },
+    { "IBM-eucKR",  "EUC-KR" },
+    { "IBM-eucTW",  "EUC-TW" },
+    { "ISO8859-1",  "ISO-8859-1" },
+    { "ISO8859-15", "ISO-8859-15" },
+    { "ISO8859-2",  "ISO-8859-2" },
+    { "ISO8859-5",  "ISO-8859-5" },
+    { "ISO8859-6",  "ISO-8859-6" },
+    { "ISO8859-7",  "ISO-8859-7" },
+    { "ISO8859-8",  "ISO-8859-8" },
+    { "ISO8859-9",  "ISO-8859-9" },
+    { "TIS-620",    "TIS-620" },
+  /*{ "UTF-8",      "UTF-8" },*/
+    { "big5",       "BIG5" }
+#   define alias_table_defined
+#  endif
+#  if defined __hpux                                        /* HP-UX */
+    { "SJIS",      "SHIFT_JIS" },
+    { "arabic8",   "HP-ARABIC8" },
+    { "big5",      "BIG5" },
+    { "cp1251",    "CP1251" },
+    { "eucJP",     "EUC-JP" },
+    { "eucKR",     "EUC-KR" },
+    { "eucTW",     "EUC-TW" },
+    { "gb18030",   "GB18030" },
+    { "greek8",    "HP-GREEK8" },
+    { "hebrew8",   "HP-HEBREW8" },
+    { "hkbig5",    "BIG5-HKSCS" },
+    { "hp15CN",    "GB2312" },
+    { "iso88591",  "ISO-8859-1" },
+    { "iso885913", "ISO-8859-13" },
+    { "iso885915", "ISO-8859-15" },
+    { "iso88592",  "ISO-8859-2" },
+    { "iso88594",  "ISO-8859-4" },
+    { "iso88595",  "ISO-8859-5" },
+    { "iso88596",  "ISO-8859-6" },
+    { "iso88597",  "ISO-8859-7" },
+    { "iso88598",  "ISO-8859-8" },
+    { "iso88599",  "ISO-8859-9" },
+    { "kana8",     "HP-KANA8" },
+    { "koi8r",     "KOI8-R" },
+    { "roman8",    "HP-ROMAN8" },
+    { "tis620",    "TIS-620" },
+    { "turkish8",  "HP-TURKISH8" },
+    { "utf8",      "UTF-8" }
+#   define alias_table_defined
+#  endif
+#  if defined __sgi                                         /* IRIX */
+    { "ISO8859-1",  "ISO-8859-1" },
+    { "ISO8859-15", "ISO-8859-15" },
+    { "ISO8859-2",  "ISO-8859-2" },
+    { "ISO8859-5",  "ISO-8859-5" },
+    { "ISO8859-7",  "ISO-8859-7" },
+    { "ISO8859-9",  "ISO-8859-9" },
+    { "eucCN",      "GB2312" },
+    { "eucJP",      "EUC-JP" },
+    { "eucKR",      "EUC-KR" },
+    { "eucTW",      "EUC-TW" }
+#   define alias_table_defined
+#  endif
+#  if defined __osf__                                       /* OSF/1 */
+  /*{ "GBK",        "GBK" },*/
+    { "ISO8859-1",  "ISO-8859-1" },
+    { "ISO8859-15", "ISO-8859-15" },
+    { "ISO8859-2",  "ISO-8859-2" },
+    { "ISO8859-4",  "ISO-8859-4" },
+    { "ISO8859-5",  "ISO-8859-5" },
+    { "ISO8859-7",  "ISO-8859-7" },
+    { "ISO8859-8",  "ISO-8859-8" },
+    { "ISO8859-9",  "ISO-8859-9" },
+    { "KSC5601",    "CP949" },
+    { "SJIS",       "SHIFT_JIS" },
+    { "TACTIS",     "TIS-620" },
+  /*{ "UTF-8",      "UTF-8" },*/
+    { "big5",       "BIG5" },
+    { "cp850",      "CP850" },
+    { "dechanyu",   "DEC-HANYU" },
+    { "dechanzi",   "GB2312" },
+    { "deckanji",   "DEC-KANJI" },
+    { "deckorean",  "EUC-KR" },
+    { "eucJP",      "EUC-JP" },
+    { "eucKR",      "EUC-KR" },
+    { "eucTW",      "EUC-TW" },
+    { "sdeckanji",  "EUC-JP" }
+#   define alias_table_defined
+#  endif
+#  if defined __sun                                         /* Solaris */
+    { "5601",        "EUC-KR" },
+    { "646",         "ASCII" },
+  /*{ "BIG5",        "BIG5" },*/
+    { "Big5-HKSCS",  "BIG5-HKSCS" },
+    { "GB18030",     "GB18030" },
+  /*{ "GBK",         "GBK" },*/
+    { "ISO8859-1",   "ISO-8859-1" },
+    { "ISO8859-11",  "TIS-620" },
+    { "ISO8859-13",  "ISO-8859-13" },
+    { "ISO8859-15",  "ISO-8859-15" },
+    { "ISO8859-2",   "ISO-8859-2" },
+    { "ISO8859-3",   "ISO-8859-3" },
+    { "ISO8859-4",   "ISO-8859-4" },
+    { "ISO8859-5",   "ISO-8859-5" },
+    { "ISO8859-6",   "ISO-8859-6" },
+    { "ISO8859-7",   "ISO-8859-7" },
+    { "ISO8859-8",   "ISO-8859-8" },
+    { "ISO8859-9",   "ISO-8859-9" },
+    { "PCK",         "SHIFT_JIS" },
+    { "TIS620.2533", "TIS-620" },
+  /*{ "UTF-8",       "UTF-8" },*/
+    { "ansi-1251",   "CP1251" },
+    { "cns11643",    "EUC-TW" },
+    { "eucJP",       "EUC-JP" },
+    { "gb2312",      "GB2312" },
+    { "koi8-r",      "KOI8-R" }
+#   define alias_table_defined
+#  endif
+#  if defined __minix                                       /* Minix */
+    { "646", "ASCII" }
+#   define alias_table_defined
+#  endif
+#  if defined WINDOWS_NATIVE || defined __CYGWIN__          /* Windows */
+    { "CP1361",  "JOHAB" },
+    { "CP20127", "ASCII" },
+    { "CP20866", "KOI8-R" },
+    { "CP20936", "GB2312" },
+    { "CP21866", "KOI8-RU" },
+    { "CP28591", "ISO-8859-1" },
+    { "CP28592", "ISO-8859-2" },
+    { "CP28593", "ISO-8859-3" },
+    { "CP28594", "ISO-8859-4" },
+    { "CP28595", "ISO-8859-5" },
+    { "CP28596", "ISO-8859-6" },
+    { "CP28597", "ISO-8859-7" },
+    { "CP28598", "ISO-8859-8" },
+    { "CP28599", "ISO-8859-9" },
+    { "CP28605", "ISO-8859-15" },
+    { "CP38598", "ISO-8859-8" },
+    { "CP51932", "EUC-JP" },
+    { "CP51936", "GB2312" },
+    { "CP51949", "EUC-KR" },
+    { "CP51950", "EUC-TW" },
+    { "CP54936", "GB18030" },
+    { "CP65001", "UTF-8" },
+    { "CP936",   "GBK" }
+#   define alias_table_defined
+#  endif
+#  if defined OS2                                           /* OS/2 */
+    /* The list of encodings is taken from "List of OS/2 Codepages"
+       by Alex Taylor:
+       <http://altsan.org/os2/toolkits/uls/index.html#codepages>.
+       See also "__convcp() of kLIBC":
+       <https://github.com/bitwiseworks/libc/blob/master/src/emx/src/lib/locale/__convcp.c>.  */
+    { "CP1004",        "CP1252" },
+  /*{ "CP1041",        "CP943" },*/
+  /*{ "CP1088",        "CP949" },*/
+    { "CP1089",        "ISO-8859-6" },
+  /*{ "CP1114",        "CP950" },*/
+  /*{ "CP1115",        "GB2312" },*/
+    { "CP1208",        "UTF-8" },
+  /*{ "CP1380",        "GB2312" },*/
+    { "CP1381",        "GB2312" },
+    { "CP1383",        "GB2312" },
+    { "CP1386",        "GBK" },
+  /*{ "CP301",         "CP943" },*/
+    { "CP3372",        "EUC-JP" },
+    { "CP4946",        "CP850" },
+  /*{ "CP5048",        "JIS_X0208-1990" },*/
+  /*{ "CP5049",        "JIS_X0212-1990" },*/
+  /*{ "CP5067",        "KS_C_5601-1987" },*/
+    { "CP813",         "ISO-8859-7" },
+    { "CP819",         "ISO-8859-1" },
+    { "CP878",         "KOI8-R" },
+  /*{ "CP897",         "CP943" },*/
+    { "CP912",         "ISO-8859-2" },
+    { "CP913",         "ISO-8859-3" },
+    { "CP914",         "ISO-8859-4" },
+    { "CP915",         "ISO-8859-5" },
+    { "CP916",         "ISO-8859-8" },
+    { "CP920",         "ISO-8859-9" },
+    { "CP921",         "ISO-8859-13" },
+    { "CP923",         "ISO-8859-15" },
+  /*{ "CP941",         "CP943" },*/
+  /*{ "CP947",         "CP950" },*/
+  /*{ "CP951",         "CP949" },*/
+  /*{ "CP952",         "JIS_X0208-1990" },*/
+  /*{ "CP953",         "JIS_X0212-1990" },*/
+    { "CP954",         "EUC-JP" },
+    { "CP964",         "EUC-TW" },
+    { "CP970",         "EUC-KR" },
+  /*{ "CP971",         "KS_C_5601-1987" },*/
+    { "IBM-1004",      "CP1252" },
+  /*{ "IBM-1006",      "?" },*/
+  /*{ "IBM-1008",      "?" },*/
+  /*{ "IBM-1041",      "CP943" },*/
+  /*{ "IBM-1051",      "?" },*/
+  /*{ "IBM-1088",      "CP949" },*/
+    { "IBM-1089",      "ISO-8859-6" },
+  /*{ "IBM-1098",      "?" },*/
+  /*{ "IBM-1114",      "CP950" },*/
+  /*{ "IBM-1115",      "GB2312" },*/
+  /*{ "IBM-1116",      "?" },*/
+  /*{ "IBM-1117",      "?" },*/
+  /*{ "IBM-1118",      "?" },*/
+  /*{ "IBM-1119",      "?" },*/
+    { "IBM-1124",      "CP1124" },
+    { "IBM-1125",      "CP1125" },
+    { "IBM-1131",      "CP1131" },
+    { "IBM-1208",      "UTF-8" },
+    { "IBM-1250",      "CP1250" },
+    { "IBM-1251",      "CP1251" },
+    { "IBM-1252",      "CP1252" },
+    { "IBM-1253",      "CP1253" },
+    { "IBM-1254",      "CP1254" },
+    { "IBM-1255",      "CP1255" },
+    { "IBM-1256",      "CP1256" },
+    { "IBM-1257",      "CP1257" },
+  /*{ "IBM-1275",      "?" },*/
+  /*{ "IBM-1276",      "?" },*/
+  /*{ "IBM-1277",      "?" },*/
+  /*{ "IBM-1280",      "?" },*/
+  /*{ "IBM-1281",      "?" },*/
+  /*{ "IBM-1282",      "?" },*/
+  /*{ "IBM-1283",      "?" },*/
+  /*{ "IBM-1380",      "GB2312" },*/
+    { "IBM-1381",      "GB2312" },
+    { "IBM-1383",      "GB2312" },
+    { "IBM-1386",      "GBK" },
+  /*{ "IBM-301",       "CP943" },*/
+    { "IBM-3372",      "EUC-JP" },
+    { "IBM-367",       "ASCII" },
+    { "IBM-437",       "CP437" },
+    { "IBM-4946",      "CP850" },
+  /*{ "IBM-5048",      "JIS_X0208-1990" },*/
+  /*{ "IBM-5049",      "JIS_X0212-1990" },*/
+  /*{ "IBM-5067",      "KS_C_5601-1987" },*/
+    { "IBM-813",       "ISO-8859-7" },
+    { "IBM-819",       "ISO-8859-1" },
+    { "IBM-850",       "CP850" },
+  /*{ "IBM-851",       "?" },*/
+    { "IBM-852",       "CP852" },
+    { "IBM-855",       "CP855" },
+    { "IBM-856",       "CP856" },
+    { "IBM-857",       "CP857" },
+  /*{ "IBM-859",       "?" },*/
+    { "IBM-860",       "CP860" },
+    { "IBM-861",       "CP861" },
+    { "IBM-862",       "CP862" },
+    { "IBM-863",       "CP863" },
+    { "IBM-864",       "CP864" },
+    { "IBM-865",       "CP865" },
+    { "IBM-866",       "CP866" },
+  /*{ "IBM-868",       "?" },*/
+    { "IBM-869",       "CP869" },
+    { "IBM-874",       "CP874" },
+    { "IBM-878",       "KOI8-R" },
+  /*{ "IBM-895",       "?" },*/
+  /*{ "IBM-897",       "CP943" },*/
+  /*{ "IBM-907",       "?" },*/
+  /*{ "IBM-909",       "?" },*/
+    { "IBM-912",       "ISO-8859-2" },
+    { "IBM-913",       "ISO-8859-3" },
+    { "IBM-914",       "ISO-8859-4" },
+    { "IBM-915",       "ISO-8859-5" },
+    { "IBM-916",       "ISO-8859-8" },
+    { "IBM-920",       "ISO-8859-9" },
+    { "IBM-921",       "ISO-8859-13" },
+    { "IBM-922",       "CP922" },
+    { "IBM-923",       "ISO-8859-15" },
+    { "IBM-932",       "CP932" },
+  /*{ "IBM-941",       "CP943" },*/
+  /*{ "IBM-942",       "?" },*/
+    { "IBM-943",       "CP943" },
+  /*{ "IBM-947",       "CP950" },*/
+    { "IBM-949",       "CP949" },
+    { "IBM-950",       "CP950" },
+  /*{ "IBM-951",       "CP949" },*/
+  /*{ "IBM-952",       "JIS_X0208-1990" },*/
+  /*{ "IBM-953",       "JIS_X0212-1990" },*/
+    { "IBM-954",       "EUC-JP" },
+  /*{ "IBM-955",       "?" },*/
+    { "IBM-964",       "EUC-TW" },
+    { "IBM-970",       "EUC-KR" },
+  /*{ "IBM-971",       "KS_C_5601-1987" },*/
+    { "IBM-eucCN",     "GB2312" },
+    { "IBM-eucJP",     "EUC-JP" },
+    { "IBM-eucKR",     "EUC-KR" },
+    { "IBM-eucTW",     "EUC-TW" },
+    { "IBM33722",      "EUC-JP" },
+    { "ISO8859-1",     "ISO-8859-1" },
+    { "ISO8859-2",     "ISO-8859-2" },
+    { "ISO8859-3",     "ISO-8859-3" },
+    { "ISO8859-4",     "ISO-8859-4" },
+    { "ISO8859-5",     "ISO-8859-5" },
+    { "ISO8859-6",     "ISO-8859-6" },
+    { "ISO8859-7",     "ISO-8859-7" },
+    { "ISO8859-8",     "ISO-8859-8" },
+    { "ISO8859-9",     "ISO-8859-9" },
+  /*{ "JISX0201-1976", "JISX0201-1976" },*/
+  /*{ "JISX0208-1978", "?" },*/
+  /*{ "JISX0208-1983", "JIS_X0208-1983" },*/
+  /*{ "JISX0208-1990", "JIS_X0208-1990" },*/
+  /*{ "JISX0212-1990", "JIS_X0212-1990" },*/
+  /*{ "KSC5601-1987",  "KS_C_5601-1987" },*/
+    { "SJIS-1",        "CP943" },
+    { "SJIS-2",        "CP943" },
+    { "eucJP",         "EUC-JP" },
+    { "eucKR",         "EUC-KR" },
+    { "eucTW-1993",    "EUC-TW" }
+#   define alias_table_defined
+#  endif
+#  if defined VMS                                           /* OpenVMS */
+    /* The list of encodings is taken from the OpenVMS 7.3-1 documentation
+       "Compaq C Run-Time Library Reference Manual for OpenVMS systems"
+       section 10.7 "Handling Different Character Sets".  */
+    { "DECHANYU",  "DEC-HANYU" },
+    { "DECHANZI",  "GB2312" },
+    { "DECKANJI",  "DEC-KANJI" },
+    { "DECKOREAN", "EUC-KR" },
+    { "ISO8859-1", "ISO-8859-1" },
+    { "ISO8859-2", "ISO-8859-2" },
+    { "ISO8859-5", "ISO-8859-5" },
+    { "ISO8859-7", "ISO-8859-7" },
+    { "ISO8859-8", "ISO-8859-8" },
+    { "ISO8859-9", "ISO-8859-9" },
+    { "SDECKANJI", "EUC-JP" },
+    { "SJIS",      "SHIFT_JIS" },
+    { "eucJP",     "EUC-JP" },
+    { "eucTW",     "EUC-TW" }
+#   define alias_table_defined
+#  endif
+#  ifndef alias_table_defined
+    /* Just a dummy entry, to avoid a C syntax error.  */
+    { "", "" }
+#  endif
+  };
+
+# endif
+
+#else
+
+/* On these platforms, we use a mapping from locale name to GNU canonical
+   encoding name.  */
+
+struct table_entry
+{
+  const char locale[17+1];
+  const char canonical[11+1];
+};
+
+/* Table of platform-dependent mappings, sorted in ascending order.  */
+static const struct table_entry locale_table[] =
+  {
+# if defined __FreeBSD__                                    /* FreeBSD 4.2 */
+    { "cs_CZ.ISO_8859-2",  "ISO-8859-2" },
+    { "da_DK.DIS_8859-15", "ISO-8859-15" },
+    { "da_DK.ISO_8859-1",  "ISO-8859-1" },
+    { "de_AT.DIS_8859-15", "ISO-8859-15" },
+    { "de_AT.ISO_8859-1",  "ISO-8859-1" },
+    { "de_CH.DIS_8859-15", "ISO-8859-15" },
+    { "de_CH.ISO_8859-1",  "ISO-8859-1" },
+    { "de_DE.DIS_8859-15", "ISO-8859-15" },
+    { "de_DE.ISO_8859-1",  "ISO-8859-1" },
+    { "en_AU.DIS_8859-15", "ISO-8859-15" },
+    { "en_AU.ISO_8859-1",  "ISO-8859-1" },
+    { "en_CA.DIS_8859-15", "ISO-8859-15" },
+    { "en_CA.ISO_8859-1",  "ISO-8859-1" },
+    { "en_GB.DIS_8859-15", "ISO-8859-15" },
+    { "en_GB.ISO_8859-1",  "ISO-8859-1" },
+    { "en_US.DIS_8859-15", "ISO-8859-15" },
+    { "en_US.ISO_8859-1",  "ISO-8859-1" },
+    { "es_ES.DIS_8859-15", "ISO-8859-15" },
+    { "es_ES.ISO_8859-1",  "ISO-8859-1" },
+    { "fi_FI.DIS_8859-15", "ISO-8859-15" },
+    { "fi_FI.ISO_8859-1",  "ISO-8859-1" },
+    { "fr_BE.DIS_8859-15", "ISO-8859-15" },
+    { "fr_BE.ISO_8859-1",  "ISO-8859-1" },
+    { "fr_CA.DIS_8859-15", "ISO-8859-15" },
+    { "fr_CA.ISO_8859-1",  "ISO-8859-1" },
+    { "fr_CH.DIS_8859-15", "ISO-8859-15" },
+    { "fr_CH.ISO_8859-1",  "ISO-8859-1" },
+    { "fr_FR.DIS_8859-15", "ISO-8859-15" },
+    { "fr_FR.ISO_8859-1",  "ISO-8859-1" },
+    { "hr_HR.ISO_8859-2",  "ISO-8859-2" },
+    { "hu_HU.ISO_8859-2",  "ISO-8859-2" },
+    { "is_IS.DIS_8859-15", "ISO-8859-15" },
+    { "is_IS.ISO_8859-1",  "ISO-8859-1" },
+    { "it_CH.DIS_8859-15", "ISO-8859-15" },
+    { "it_CH.ISO_8859-1",  "ISO-8859-1" },
+    { "it_IT.DIS_8859-15", "ISO-8859-15" },
+    { "it_IT.ISO_8859-1",  "ISO-8859-1" },
+    { "ja_JP.EUC",         "EUC-JP" },
+    { "ja_JP.SJIS",        "SHIFT_JIS" },
+    { "ja_JP.Shift_JIS",   "SHIFT_JIS" },
+    { "ko_KR.EUC",         "EUC-KR" },
+    { "la_LN.ASCII",       "ASCII" },
+    { "la_LN.DIS_8859-15", "ISO-8859-15" },
+    { "la_LN.ISO_8859-1",  "ISO-8859-1" },
+    { "la_LN.ISO_8859-2",  "ISO-8859-2" },
+    { "la_LN.ISO_8859-4",  "ISO-8859-4" },
+    { "lt_LN.ASCII",       "ASCII" },
+    { "lt_LN.DIS_8859-15", "ISO-8859-15" },
+    { "lt_LN.ISO_8859-1",  "ISO-8859-1" },
+    { "lt_LN.ISO_8859-2",  "ISO-8859-2" },
+    { "lt_LT.ISO_8859-4",  "ISO-8859-4" },
+    { "nl_BE.DIS_8859-15", "ISO-8859-15" },
+    { "nl_BE.ISO_8859-1",  "ISO-8859-1" },
+    { "nl_NL.DIS_8859-15", "ISO-8859-15" },
+    { "nl_NL.ISO_8859-1",  "ISO-8859-1" },
+    { "no_NO.DIS_8859-15", "ISO-8859-15" },
+    { "no_NO.ISO_8859-1",  "ISO-8859-1" },
+    { "pl_PL.ISO_8859-2",  "ISO-8859-2" },
+    { "pt_PT.DIS_8859-15", "ISO-8859-15" },
+    { "pt_PT.ISO_8859-1",  "ISO-8859-1" },
+    { "ru_RU.CP866",       "CP866" },
+    { "ru_RU.ISO_8859-5",  "ISO-8859-5" },
+    { "ru_RU.KOI8-R",      "KOI8-R" },
+    { "ru_SU.CP866",       "CP866" },
+    { "ru_SU.ISO_8859-5",  "ISO-8859-5" },
+    { "ru_SU.KOI8-R",      "KOI8-R" },
+    { "sl_SI.ISO_8859-2",  "ISO-8859-2" },
+    { "sv_SE.DIS_8859-15", "ISO-8859-15" },
+    { "sv_SE.ISO_8859-1",  "ISO-8859-1" },
+    { "uk_UA.KOI8-U",      "KOI8-U" },
+    { "zh_CN.EUC",         "GB2312" },
+    { "zh_TW.BIG5",        "BIG5" },
+    { "zh_TW.Big5",        "BIG5" }
+#  define locale_table_defined
+# endif
+# if defined __DJGPP__                                      /* DOS / DJGPP 2.03 */
+    /* The encodings given here may not all be correct.
+       If you find that the encoding given for your language and
+       country is not the one your DOS machine actually uses, just
+       correct it in this file, and send a mail to
+       Juan Manuel Guerrero <juan.guerrero@gmx.de>
+       and <bug-gnulib@gnu.org>.  */
+    { "C",     "ASCII" },
+    { "ar",    "CP864" },
+    { "ar_AE", "CP864" },
+    { "ar_DZ", "CP864" },
+    { "ar_EG", "CP864" },
+    { "ar_IQ", "CP864" },
+    { "ar_IR", "CP864" },
+    { "ar_JO", "CP864" },
+    { "ar_KW", "CP864" },
+    { "ar_MA", "CP864" },
+    { "ar_OM", "CP864" },
+    { "ar_QA", "CP864" },
+    { "ar_SA", "CP864" },
+    { "ar_SY", "CP864" },
+    { "be",    "CP866" },
+    { "be_BE", "CP866" },
+    { "bg",    "CP866" }, /* not CP855 ?? */
+    { "bg_BG", "CP866" }, /* not CP855 ?? */
+    { "ca",    "CP850" },
+    { "ca_ES", "CP850" },
+    { "cs",    "CP852" },
+    { "cs_CZ", "CP852" },
+    { "da",    "CP865" }, /* not CP850 ?? */
+    { "da_DK", "CP865" }, /* not CP850 ?? */
+    { "de",    "CP850" },
+    { "de_AT", "CP850" },
+    { "de_CH", "CP850" },
+    { "de_DE", "CP850" },
+    { "el",    "CP869" },
+    { "el_GR", "CP869" },
+    { "en",    "CP850" },
+    { "en_AU", "CP850" }, /* not CP437 ?? */
+    { "en_CA", "CP850" },
+    { "en_GB", "CP850" },
+    { "en_NZ", "CP437" },
+    { "en_US", "CP437" },
+    { "en_ZA", "CP850" }, /* not CP437 ?? */
+    { "eo",    "CP850" },
+    { "eo_EO", "CP850" },
+    { "es",    "CP850" },
+    { "es_AR", "CP850" },
+    { "es_BO", "CP850" },
+    { "es_CL", "CP850" },
+    { "es_CO", "CP850" },
+    { "es_CR", "CP850" },
+    { "es_CU", "CP850" },
+    { "es_DO", "CP850" },
+    { "es_EC", "CP850" },
+    { "es_ES", "CP850" },
+    { "es_GT", "CP850" },
+    { "es_HN", "CP850" },
+    { "es_MX", "CP850" },
+    { "es_NI", "CP850" },
+    { "es_PA", "CP850" },
+    { "es_PE", "CP850" },
+    { "es_PY", "CP850" },
+    { "es_SV", "CP850" },
+    { "es_UY", "CP850" },
+    { "es_VE", "CP850" },
+    { "et",    "CP850" },
+    { "et_EE", "CP850" },
+    { "eu",    "CP850" },
+    { "eu_ES", "CP850" },
+    { "fi",    "CP850" },
+    { "fi_FI", "CP850" },
+    { "fr",    "CP850" },
+    { "fr_BE", "CP850" },
+    { "fr_CA", "CP850" },
+    { "fr_CH", "CP850" },
+    { "fr_FR", "CP850" },
+    { "ga",    "CP850" },
+    { "ga_IE", "CP850" },
+    { "gd",    "CP850" },
+    { "gd_GB", "CP850" },
+    { "gl",    "CP850" },
+    { "gl_ES", "CP850" },
+    { "he",    "CP862" },
+    { "he_IL", "CP862" },
+    { "hr",    "CP852" },
+    { "hr_HR", "CP852" },
+    { "hu",    "CP852" },
+    { "hu_HU", "CP852" },
+    { "id",    "CP850" }, /* not CP437 ?? */
+    { "id_ID", "CP850" }, /* not CP437 ?? */
+    { "is",    "CP861" }, /* not CP850 ?? */
+    { "is_IS", "CP861" }, /* not CP850 ?? */
+    { "it",    "CP850" },
+    { "it_CH", "CP850" },
+    { "it_IT", "CP850" },
+    { "ja",    "CP932" },
+    { "ja_JP", "CP932" },
+    { "kr",    "CP949" }, /* not CP934 ?? */
+    { "kr_KR", "CP949" }, /* not CP934 ?? */
+    { "lt",    "CP775" },
+    { "lt_LT", "CP775" },
+    { "lv",    "CP775" },
+    { "lv_LV", "CP775" },
+    { "mk",    "CP866" }, /* not CP855 ?? */
+    { "mk_MK", "CP866" }, /* not CP855 ?? */
+    { "mt",    "CP850" },
+    { "mt_MT", "CP850" },
+    { "nb",    "CP865" }, /* not CP850 ?? */
+    { "nb_NO", "CP865" }, /* not CP850 ?? */
+    { "nl",    "CP850" },
+    { "nl_BE", "CP850" },
+    { "nl_NL", "CP850" },
+    { "nn",    "CP865" }, /* not CP850 ?? */
+    { "nn_NO", "CP865" }, /* not CP850 ?? */
+    { "no",    "CP865" }, /* not CP850 ?? */
+    { "no_NO", "CP865" }, /* not CP850 ?? */
+    { "pl",    "CP852" },
+    { "pl_PL", "CP852" },
+    { "pt",    "CP850" },
+    { "pt_BR", "CP850" },
+    { "pt_PT", "CP850" },
+    { "ro",    "CP852" },
+    { "ro_RO", "CP852" },
+    { "ru",    "CP866" },
+    { "ru_RU", "CP866" },
+    { "sk",    "CP852" },
+    { "sk_SK", "CP852" },
+    { "sl",    "CP852" },
+    { "sl_SI", "CP852" },
+    { "sq",    "CP852" },
+    { "sq_AL", "CP852" },
+    { "sr",    "CP852" }, /* CP852 or CP866 or CP855 ?? */
+    { "sr_CS", "CP852" }, /* CP852 or CP866 or CP855 ?? */
+    { "sr_YU", "CP852" }, /* CP852 or CP866 or CP855 ?? */
+    { "sv",    "CP850" },
+    { "sv_SE", "CP850" },
+    { "th",    "CP874" },
+    { "th_TH", "CP874" },
+    { "tr",    "CP857" },
+    { "tr_TR", "CP857" },
+    { "uk",    "CP1125" },
+    { "uk_UA", "CP1125" },
+    { "zh_CN", "GBK" },
+    { "zh_TW", "CP950" } /* not CP938 ?? */
+#  define locale_table_defined
+# endif
+# ifndef locale_table_defined
+    /* Just a dummy entry, to avoid a C syntax error.  */
+    { "", "" }
+# endif
+  };
+
+#endif
+
+
+/* Determine the current locale's character encoding, and canonicalize it
+   into one of the canonical names listed below.
+   The result must not be freed; it is statically allocated.  The result
+   becomes invalid when setlocale() is used to change the global locale, or
+   when the value of one of the environment variables LC_ALL, LC_CTYPE, LANG
+   is changed; threads in multithreaded programs should not do this.
+   If the canonical name cannot be determined, the result is a non-canonical
+   name.  */
+
+#ifdef STATIC
+STATIC
+#endif
+const char *
+locale_charset (void)
+{
+  const char *codeset;
+
+  /* This function must be multithread-safe.  To achieve this without using
+     thread-local storage, we use a simple strcpy or memcpy to fill this static
+     buffer.  Filling it through, for example, strcpy + strcat would not be
+     guaranteed to leave the buffer's contents intact if another thread is
+     currently accessing it.  If necessary, the contents is first assembled in
+     a stack-allocated buffer.  */
+
+#if HAVE_LANGINFO_CODESET || defined WINDOWS_NATIVE || defined OS2
+
+# if HAVE_LANGINFO_CODESET
+
+  /* Most systems support nl_langinfo (CODESET) nowadays.  */
+  codeset = nl_langinfo (CODESET);
+
+#  ifdef __CYGWIN__
+  /* Cygwin < 1.7 does not have locales.  nl_langinfo (CODESET) always
+     returns "US-ASCII".  Return the suffix of the locale name from the
+     environment variables (if present) or the codepage as a number.  */
+  if (codeset != NULL && strcmp (codeset, "US-ASCII") == 0)
+    {
+      const char *locale;
+      static char resultbuf[2 + 10 + 1];
+
+      locale = getenv ("LC_ALL");
+      if (locale == NULL || locale[0] == '\0')
+        {
+          locale = getenv ("LC_CTYPE");
+          if (locale == NULL || locale[0] == '\0')
+            locale = getenv ("LANG");
+        }
+      if (locale != NULL && locale[0] != '\0')
+        {
+          /* If the locale name contains an encoding after the dot, return
+             it.  */
+          const char *dot = strchr (locale, '.');
+
+          if (dot != NULL)
+            {
+              const char *modifier;
+
+              dot++;
+              /* Look for the possible @... trailer and remove it, if any.  */
+              modifier = strchr (dot, '@');
+              if (modifier == NULL)
+                return dot;
+              if (modifier - dot < sizeof (resultbuf))
+                {
+                  /* This way of filling resultbuf is multithread-safe.  */
+                  memcpy (resultbuf, dot, modifier - dot);
+                  resultbuf [modifier - dot] = '\0';
+                  return resultbuf;
+                }
+            }
+        }
+
+      /* The Windows API has a function returning the locale's codepage as a
+         number: GetACP().  This encoding is used by Cygwin, unless the user
+         has set the environment variable CYGWIN=codepage:oem (which very few
+         people do).
+         Output directed to console windows needs to be converted (to
+         GetOEMCP() if the console is using a raster font, or to
+         GetConsoleOutputCP() if it is using a TrueType font).  Cygwin does
+         this conversion transparently (see winsup/cygwin/fhandler_console.cc),
+         converting to GetConsoleOutputCP().  This leads to correct results,
+         except when SetConsoleOutputCP has been called and a raster font is
+         in use.  */
+      {
+        char buf[2 + 10 + 1];
+
+        sprintf (buf, "CP%u", GetACP ());
+        strcpy (resultbuf, buf);
+        codeset = resultbuf;
+      }
+    }
+#  endif
+
+  if (codeset == NULL)
+    /* The canonical name cannot be determined.  */
+    codeset = "";
+
+# elif defined WINDOWS_NATIVE
+
+  char buf[2 + 10 + 1];
+  static char resultbuf[2 + 10 + 1];
+
+  /* The Windows API has a function returning the locale's codepage as
+     a number, but the value doesn't change according to what the
+     'setlocale' call specified.  So we use it as a last resort, in
+     case the string returned by 'setlocale' doesn't specify the
+     codepage.  */
+  char *current_locale = setlocale (LC_CTYPE, NULL);
+  char *pdot = strrchr (current_locale, '.');
+
+  if (pdot && 2 + strlen (pdot + 1) + 1 <= sizeof (buf))
+    sprintf (buf, "CP%s", pdot + 1);
+  else
+    {
+      /* The Windows API has a function returning the locale's codepage as a
+         number: GetACP().
+         When the output goes to a console window, it needs to be provided in
+         GetOEMCP() encoding if the console is using a raster font, or in
+         GetConsoleOutputCP() encoding if it is using a TrueType font.
+         But in GUI programs and for output sent to files and pipes, GetACP()
+         encoding is the best bet.  */
+      sprintf (buf, "CP%u", GetACP ());
+    }
+  /* For a locale name such as "French_France.65001", in Windows 10,
+     setlocale now returns "French_France.utf8" instead.  */
+  if (strcmp (buf + 2, "65001") == 0 || strcmp (buf + 2, "utf8") == 0)
+    codeset = "UTF-8";
+  else
+    {
+      strcpy (resultbuf, buf);
+      codeset = resultbuf;
+    }
+
+# elif defined OS2
+
+  const char *locale;
+  static char resultbuf[2 + 10 + 1];
+  ULONG cp[3];
+  ULONG cplen;
+
+  codeset = NULL;
+
+  /* Allow user to override the codeset, as set in the operating system,
+     with standard language environment variables.  */
+  locale = getenv ("LC_ALL");
+  if (locale == NULL || locale[0] == '\0')
+    {
+      locale = getenv ("LC_CTYPE");
+      if (locale == NULL || locale[0] == '\0')
+        locale = getenv ("LANG");
+    }
+  if (locale != NULL && locale[0] != '\0')
+    {
+      /* If the locale name contains an encoding after the dot, return it.  */
+      const char *dot = strchr (locale, '.');
+
+      if (dot != NULL)
+        {
+          const char *modifier;
+
+          dot++;
+          /* Look for the possible @... trailer and remove it, if any.  */
+          modifier = strchr (dot, '@');
+          if (modifier == NULL)
+            return dot;
+          if (modifier - dot < sizeof (resultbuf))
+            {
+              /* This way of filling resultbuf is multithread-safe.  */
+              memcpy (resultbuf, dot, modifier - dot);
+              resultbuf [modifier - dot] = '\0';
+              return resultbuf;
+            }
+        }
+
+      /* For the POSIX locale, don't use the system's codepage.  */
+      if (strcmp (locale, "C") == 0 || strcmp (locale, "POSIX") == 0)
+        codeset = "";
+    }
+
+  if (codeset == NULL)
+    {
+      /* OS/2 has a function returning the locale's codepage as a number.  */
+      if (DosQueryCp (sizeof (cp), cp, &cplen))
+        codeset = "";
+      else
+        {
+          char buf[2 + 10 + 1];
+
+          sprintf (buf, "CP%u", cp[0]);
+          strcpy (resultbuf, buf);
+          codeset = resultbuf;
+        }
+    }
+
+# else
+
+#  error "Add code for other platforms here."
+
+# endif
+
+  /* Resolve alias.  */
+  {
+# ifdef alias_table_defined
+    /* On some platforms, UTF-8 locales are the most frequently used ones.
+       Speed up the common case and slow down the less common cases by
+       testing for this case first.  */
+#  if defined __OpenBSD__ || (defined __APPLE__ && defined __MACH__) || defined __sun || defined __CYGWIN__
+    if (strcmp (codeset, "UTF-8") == 0)
+      goto done_table_lookup;
+    else
+#  endif
+      {
+        const struct table_entry * const table = alias_table;
+        size_t const table_size =
+          sizeof (alias_table) / sizeof (struct table_entry);
+        /* The table is sorted.  Perform a binary search.  */
+        size_t hi = table_size;
+        size_t lo = 0;
+        while (lo < hi)
+          {
+            /* Invariant:
+               for i < lo, strcmp (table[i].alias, codeset) < 0,
+               for i >= hi, strcmp (table[i].alias, codeset) > 0.  */
+            size_t mid = (hi + lo) >> 1; /* >= lo, < hi */
+            int cmp = strcmp (table[mid].alias, codeset);
+            if (cmp < 0)
+              lo = mid + 1;
+            else if (cmp > 0)
+              hi = mid;
+            else
+              {
+                /* Found an i with
+                     strcmp (table[i].alias, codeset) == 0.  */
+                codeset = table[mid].canonical;
+                goto done_table_lookup;
+              }
+          }
+      }
+    if (0)
+      done_table_lookup: ;
+    else
+# endif
+      {
+        /* Did not find it in the table.  */
+        /* On Mac OS X, all modern locales use the UTF-8 encoding.
+           BeOS and Haiku have a single locale, and it has UTF-8 encoding.  */
+# if (defined __APPLE__ && defined __MACH__) || defined __BEOS__ || defined __HAIKU__
+        codeset = "UTF-8";
+# else
+        /* Don't return an empty string.  GNU libc and GNU libiconv interpret
+           the empty string as denoting "the locale's character encoding",
+           thus GNU libiconv would call this function a second time.  */
+        if (codeset[0] == '\0')
+          codeset = "ASCII";
+# endif
+      }
+  }
+
+#else
+
+  /* On old systems which lack it, use setlocale or getenv.  */
+  const char *locale = NULL;
+
+  /* But most old systems don't have a complete set of locales.  Some
+     (like DJGPP) have only the C locale.  Therefore we don't use setlocale
+     here; it would return "C" when it doesn't support the locale name the
+     user has set.  */
+# if 0
+  locale = setlocale (LC_CTYPE, NULL);
+# endif
+  if (locale == NULL || locale[0] == '\0')
+    {
+      locale = getenv ("LC_ALL");
+      if (locale == NULL || locale[0] == '\0')
+        {
+          locale = getenv ("LC_CTYPE");
+          if (locale == NULL || locale[0] == '\0')
+            locale = getenv ("LANG");
+            if (locale == NULL)
+              locale = "";
+        }
+    }
+
+  /* Map locale name to canonical encoding name.  */
+  {
+# ifdef locale_table_defined
+    const struct table_entry * const table = locale_table;
+    size_t const table_size =
+      sizeof (locale_table) / sizeof (struct table_entry);
+    /* The table is sorted.  Perform a binary search.  */
+    size_t hi = table_size;
+    size_t lo = 0;
+    while (lo < hi)
+      {
+        /* Invariant:
+           for i < lo, strcmp (table[i].locale, locale) < 0,
+           for i >= hi, strcmp (table[i].locale, locale) > 0.  */
+        size_t mid = (hi + lo) >> 1; /* >= lo, < hi */
+        int cmp = strcmp (table[mid].locale, locale);
+        if (cmp < 0)
+          lo = mid + 1;
+        else if (cmp > 0)
+          hi = mid;
+        else
+          {
+            /* Found an i with
+                 strcmp (table[i].locale, locale) == 0.  */
+            codeset = table[mid].canonical;
+            goto done_table_lookup;
+          }
+      }
+    if (0)
+      done_table_lookup: ;
+    else
+# endif
+      {
+        /* Did not find it in the table.  */
+        /* On Mac OS X, all modern locales use the UTF-8 encoding.
+           BeOS and Haiku have a single locale, and it has UTF-8 encoding.  */
+# if (defined __APPLE__ && defined __MACH__) || defined __BEOS__ || defined __HAIKU__
+        codeset = "UTF-8";
+# else
+        /* The canonical name cannot be determined.  */
+        /* Don't return an empty string.  GNU libc and GNU libiconv interpret
+           the empty string as denoting "the locale's character encoding",
+           thus GNU libiconv would call this function a second time.  */
+        codeset = "ASCII";
+# endif
+      }
+  }
+
+#endif
+
+#ifdef DARWIN7
+  /* Mac OS X sets MB_CUR_MAX to 1 when LC_ALL=C, and "UTF-8"
+     (the default codeset) does not work when MB_CUR_MAX is 1.  */
+  if (strcmp (codeset, "UTF-8") == 0 && MB_CUR_MAX_L (uselocale (NULL)) <= 1)
+    codeset = "ASCII";
+#endif
+
+  return codeset;
+}
diff --git a/src/grep/lib/localcharset.h b/src/grep/lib/localcharset.h
new file mode 100644
index 0000000..0ff4954
--- /dev/null
+++ b/src/grep/lib/localcharset.h
@@ -0,0 +1,137 @@
+/* Determine a canonical name for the current locale's character encoding.
+   Copyright (C) 2000-2003, 2009-2021 Free Software Foundation, Inc.
+   This file is part of the GNU CHARSET Library.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _LOCALCHARSET_H
+#define _LOCALCHARSET_H
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Determine the current locale's character encoding, and canonicalize it
+   into one of the canonical names listed below.
+   The result must not be freed; it is statically allocated.  The result
+   becomes invalid when setlocale() is used to change the global locale, or
+   when the value of one of the environment variables LC_ALL, LC_CTYPE, LANG
+   is changed; threads in multithreaded programs should not do this.
+   If the canonical name cannot be determined, the result is a non-canonical
+   name.  */
+extern const char * locale_charset (void);
+
+/* About GNU canonical names for character encodings:
+
+   Every canonical name must be supported by GNU libiconv.  Support by GNU libc
+   is also desirable.
+
+   The name is case insensitive.  Usually an upper case MIME charset name is
+   preferred.
+
+   The current list of these GNU canonical names is:
+
+       name              MIME?             used by which systems
+                                    (darwin = Mac OS X, windows = native Windows)
+
+   ASCII, ANSI_X3.4-1968       glibc solaris freebsd netbsd darwin minix cygwin
+   ISO-8859-1              Y   glibc aix hpux irix osf solaris freebsd netbsd openbsd darwin cygwin zos
+   ISO-8859-2              Y   glibc aix hpux irix osf solaris freebsd netbsd openbsd darwin cygwin zos
+   ISO-8859-3              Y   glibc solaris cygwin
+   ISO-8859-4              Y   hpux osf solaris freebsd netbsd openbsd darwin
+   ISO-8859-5              Y   glibc aix hpux irix osf solaris freebsd netbsd openbsd darwin cygwin zos
+   ISO-8859-6              Y   glibc aix hpux solaris cygwin
+   ISO-8859-7              Y   glibc aix hpux irix osf solaris freebsd netbsd openbsd darwin cygwin zos
+   ISO-8859-8              Y   glibc aix hpux osf solaris cygwin zos
+   ISO-8859-9              Y   glibc aix hpux irix osf solaris freebsd darwin cygwin zos
+   ISO-8859-13                 glibc hpux solaris freebsd netbsd openbsd darwin cygwin
+   ISO-8859-14                 glibc cygwin
+   ISO-8859-15                 glibc aix irix osf solaris freebsd netbsd openbsd darwin cygwin
+   KOI8-R                  Y   glibc hpux solaris freebsd netbsd openbsd darwin
+   KOI8-U                  Y   glibc freebsd netbsd openbsd darwin cygwin
+   KOI8-T                      glibc
+   CP437                       dos
+   CP775                       dos
+   CP850                       aix osf dos
+   CP852                       dos
+   CP855                       dos
+   CP856                       aix
+   CP857                       dos
+   CP861                       dos
+   CP862                       dos
+   CP864                       dos
+   CP865                       dos
+   CP866                       freebsd netbsd openbsd darwin dos
+   CP869                       dos
+   CP874                       windows dos
+   CP922                       aix
+   CP932                       aix cygwin windows dos
+   CP943                       aix zos
+   CP949                       osf darwin windows dos
+   CP950                       windows dos
+   CP1046                      aix
+   CP1124                      aix
+   CP1125                      dos
+   CP1129                      aix
+   CP1131                      freebsd darwin
+   CP1250                      windows
+   CP1251                      glibc hpux solaris freebsd netbsd openbsd darwin cygwin windows
+   CP1252                      aix windows
+   CP1253                      windows
+   CP1254                      windows
+   CP1255                      glibc windows
+   CP1256                      windows
+   CP1257                      windows
+   GB2312                  Y   glibc aix hpux irix solaris freebsd netbsd darwin cygwin zos
+   EUC-JP                  Y   glibc aix hpux irix osf solaris freebsd netbsd darwin cygwin
+   EUC-KR                  Y   glibc aix hpux irix osf solaris freebsd netbsd darwin cygwin zos
+   EUC-TW                      glibc aix hpux irix osf solaris netbsd
+   BIG5                    Y   glibc aix hpux osf solaris freebsd netbsd darwin cygwin zos
+   BIG5-HKSCS                  glibc hpux solaris netbsd darwin
+   GBK                         glibc aix osf solaris freebsd darwin cygwin windows dos
+   GB18030                     glibc hpux solaris freebsd netbsd darwin
+   SHIFT_JIS               Y   hpux osf solaris freebsd netbsd darwin
+   JOHAB                       glibc solaris windows
+   TIS-620                     glibc aix hpux osf solaris cygwin zos
+   VISCII                  Y   glibc
+   TCVN5712-1                  glibc
+   ARMSCII-8                   glibc freebsd netbsd darwin
+   GEORGIAN-PS                 glibc cygwin
+   PT154                       glibc netbsd cygwin
+   HP-ROMAN8                   hpux
+   HP-ARABIC8                  hpux
+   HP-GREEK8                   hpux
+   HP-HEBREW8                  hpux
+   HP-TURKISH8                 hpux
+   HP-KANA8                    hpux
+   DEC-KANJI                   osf
+   DEC-HANYU                   osf
+   UTF-8                   Y   glibc aix hpux osf solaris netbsd darwin cygwin zos
+
+   Note: Names which are not marked as being a MIME name should not be used in
+   Internet protocols for information interchange (mail, news, etc.).
+
+   Note: ASCII and ANSI_X3.4-1968 are synonymous canonical names.  Applications
+   must understand both names and treat them as equivalent.
+ */
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* _LOCALCHARSET_H */
diff --git a/src/grep/lib/locale.in.h b/src/grep/lib/locale.in.h
new file mode 100644
index 0000000..1063070
--- /dev/null
+++ b/src/grep/lib/locale.in.h
@@ -0,0 +1,305 @@
+/* A POSIX <locale.h>.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if (defined _WIN32 && !defined __CYGWIN__ && defined __need_locale_t) \
+    || defined _GL_ALREADY_INCLUDING_LOCALE_H
+
+/* Special invocation convention:
+   - Inside mingw header files,
+   - To handle Solaris header files (through Solaris 10) when combined
+     with gettext's libintl.h.  */
+
+#@INCLUDE_NEXT@ @NEXT_LOCALE_H@
+
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_LOCALE_H
+
+#define _GL_ALREADY_INCLUDING_LOCALE_H
+
+/* The include_next requires a split double-inclusion guard.  */
+#@INCLUDE_NEXT@ @NEXT_LOCALE_H@
+
+#undef _GL_ALREADY_INCLUDING_LOCALE_H
+
+#ifndef _@GUARD_PREFIX@_LOCALE_H
+#define _@GUARD_PREFIX@_LOCALE_H
+
+/* NetBSD 5.0 mis-defines NULL.  */
+#include <stddef.h>
+
+/* Mac OS X 10.5 defines the locale_t type in <xlocale.h>.  */
+#if @HAVE_XLOCALE_H@
+# include <xlocale.h>
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+/* The LC_MESSAGES locale category is specified in POSIX, but not in ISO C.
+   On systems that don't define it, use the same value as GNU libintl.  */
+#if !defined LC_MESSAGES
+# define LC_MESSAGES 1729
+#endif
+
+/* On native Windows with MSVC, 'struct lconv' lacks the members int_p_* and
+   int_n_*.  Instead of overriding 'struct lconv', merely define these member
+   names as macros.  This avoids trouble in C++ mode.  */
+#if defined _MSC_VER
+# define int_p_cs_precedes   p_cs_precedes
+# define int_p_sign_posn     p_sign_posn
+# define int_p_sep_by_space  p_sep_by_space
+# define int_n_cs_precedes   n_cs_precedes
+# define int_n_sign_posn     n_sign_posn
+# define int_n_sep_by_space  n_sep_by_space
+#endif
+
+/* Bionic libc's 'struct lconv' is just a dummy.  */
+#if @REPLACE_STRUCT_LCONV@
+# define lconv rpl_lconv
+struct lconv
+{
+  /* All 'char *' are actually 'const char *'.  */
+
+  /* Members that depend on the LC_NUMERIC category of the locale.  See
+     <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html#tag_07_03_04> */
+
+  /* Symbol used as decimal point.  */
+  char *decimal_point;
+  /* Symbol used to separate groups of digits to the left of the decimal
+     point.  */
+  char *thousands_sep;
+  /* Definition of the size of groups of digits to the left of the decimal
+     point.  */
+  char *grouping;
+
+  /* Members that depend on the LC_MONETARY category of the locale.  See
+     <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html#tag_07_03_03> */
+
+  /* Symbol used as decimal point.  */
+  char *mon_decimal_point;
+  /* Symbol used to separate groups of digits to the left of the decimal
+     point.  */
+  char *mon_thousands_sep;
+  /* Definition of the size of groups of digits to the left of the decimal
+     point.  */
+  char *mon_grouping;
+  /* Sign used to indicate a value >= 0.  */
+  char *positive_sign;
+  /* Sign used to indicate a value < 0.  */
+  char *negative_sign;
+
+  /* For formatting local currency.  */
+  /* Currency symbol (3 characters) followed by separator (1 character).  */
+  char *currency_symbol;
+  /* Number of digits after the decimal point.  */
+  char frac_digits;
+  /* For values >= 0: 1 if the currency symbol precedes the number, 0 if it
+     comes after the number.  */
+  char p_cs_precedes;
+  /* For values >= 0: Position of the sign.  */
+  char p_sign_posn;
+  /* For values >= 0: Placement of spaces between currency symbol, sign, and
+     number.  */
+  char p_sep_by_space;
+  /* For values < 0: 1 if the currency symbol precedes the number, 0 if it
+     comes after the number.  */
+  char n_cs_precedes;
+  /* For values < 0: Position of the sign.  */
+  char n_sign_posn;
+  /* For values < 0: Placement of spaces between currency symbol, sign, and
+     number.  */
+  char n_sep_by_space;
+
+  /* For formatting international currency.  */
+  /* Currency symbol (3 characters) followed by separator (1 character).  */
+  char *int_curr_symbol;
+  /* Number of digits after the decimal point.  */
+  char int_frac_digits;
+  /* For values >= 0: 1 if the currency symbol precedes the number, 0 if it
+     comes after the number.  */
+  char int_p_cs_precedes;
+  /* For values >= 0: Position of the sign.  */
+  char int_p_sign_posn;
+  /* For values >= 0: Placement of spaces between currency symbol, sign, and
+     number.  */
+  char int_p_sep_by_space;
+  /* For values < 0: 1 if the currency symbol precedes the number, 0 if it
+     comes after the number.  */
+  char int_n_cs_precedes;
+  /* For values < 0: Position of the sign.  */
+  char int_n_sign_posn;
+  /* For values < 0: Placement of spaces between currency symbol, sign, and
+     number.  */
+  char int_n_sep_by_space;
+};
+#endif
+
+#if @GNULIB_LOCALECONV@
+# if @REPLACE_LOCALECONV@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef localeconv
+#   define localeconv rpl_localeconv
+#  endif
+_GL_FUNCDECL_RPL (localeconv, struct lconv *, (void));
+_GL_CXXALIAS_RPL (localeconv, struct lconv *, (void));
+# else
+_GL_CXXALIAS_SYS (localeconv, struct lconv *, (void));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (localeconv);
+# endif
+#elif @REPLACE_STRUCT_LCONV@
+# undef localeconv
+# define localeconv localeconv_used_without_requesting_gnulib_module_localeconv
+#elif defined GNULIB_POSIXCHECK
+# undef localeconv
+# if HAVE_RAW_DECL_LOCALECONV
+_GL_WARN_ON_USE (localeconv,
+                 "localeconv returns too few information on some platforms - "
+                 "use gnulib module localeconv for portability");
+# endif
+#endif
+
+#if @GNULIB_SETLOCALE@
+# if @REPLACE_SETLOCALE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef setlocale
+#   define setlocale rpl_setlocale
+#   define GNULIB_defined_setlocale 1
+#  endif
+_GL_FUNCDECL_RPL (setlocale, char *, (int category, const char *locale));
+_GL_CXXALIAS_RPL (setlocale, char *, (int category, const char *locale));
+# else
+_GL_CXXALIAS_SYS (setlocale, char *, (int category, const char *locale));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (setlocale);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef setlocale
+# if HAVE_RAW_DECL_SETLOCALE
+_GL_WARN_ON_USE (setlocale, "setlocale works differently on native Windows - "
+                 "use gnulib module setlocale for portability");
+# endif
+#endif
+
+#if @GNULIB_SETLOCALE_NULL@
+/* Included here for convenience.  */
+# include "setlocale_null.h"
+#endif
+
+#if /*@GNULIB_NEWLOCALE@ ||*/ (@GNULIB_LOCALENAME@ && @LOCALENAME_ENHANCE_LOCALE_FUNCS@ && @HAVE_NEWLOCALE@)
+# if @REPLACE_NEWLOCALE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef newlocale
+#   define newlocale rpl_newlocale
+#   define GNULIB_defined_newlocale 1
+#  endif
+_GL_FUNCDECL_RPL (newlocale, locale_t,
+                  (int category_mask, const char *name, locale_t base)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (newlocale, locale_t,
+                  (int category_mask, const char *name, locale_t base));
+# else
+#  if @HAVE_NEWLOCALE@
+_GL_CXXALIAS_SYS (newlocale, locale_t,
+                  (int category_mask, const char *name, locale_t base));
+#  endif
+# endif
+# if @HAVE_NEWLOCALE@
+_GL_CXXALIASWARN (newlocale);
+# endif
+# if @HAVE_NEWLOCALE@ || @REPLACE_NEWLOCALE@
+#  ifndef HAVE_WORKING_NEWLOCALE
+#   define HAVE_WORKING_NEWLOCALE 1
+#  endif
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef newlocale
+# if HAVE_RAW_DECL_NEWLOCALE
+_GL_WARN_ON_USE (newlocale, "newlocale is not portable");
+# endif
+#endif
+
+#if @GNULIB_DUPLOCALE@ || (@GNULIB_LOCALENAME@ && @LOCALENAME_ENHANCE_LOCALE_FUNCS@ && @HAVE_DUPLOCALE@)
+# if @REPLACE_DUPLOCALE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef duplocale
+#   define duplocale rpl_duplocale
+#   define GNULIB_defined_duplocale 1
+#  endif
+_GL_FUNCDECL_RPL (duplocale, locale_t, (locale_t locale) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (duplocale, locale_t, (locale_t locale));
+# else
+#  if @HAVE_DUPLOCALE@
+_GL_CXXALIAS_SYS (duplocale, locale_t, (locale_t locale));
+#  endif
+# endif
+# if @HAVE_DUPLOCALE@
+_GL_CXXALIASWARN (duplocale);
+# endif
+# if @HAVE_DUPLOCALE@ || @REPLACE_DUPLOCALE@
+#  ifndef HAVE_WORKING_DUPLOCALE
+#   define HAVE_WORKING_DUPLOCALE 1
+#  endif
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef duplocale
+# if HAVE_RAW_DECL_DUPLOCALE
+_GL_WARN_ON_USE (duplocale, "duplocale is buggy on some glibc systems - "
+                 "use gnulib module duplocale for portability");
+# endif
+#endif
+
+#if /*@GNULIB_FREELOCALE@ ||*/ (@GNULIB_LOCALENAME@ && @LOCALENAME_ENHANCE_LOCALE_FUNCS@ && @HAVE_FREELOCALE@)
+# if @REPLACE_FREELOCALE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef freelocale
+#   define freelocale rpl_freelocale
+#   define GNULIB_defined_freelocale 1
+#  endif
+_GL_FUNCDECL_RPL (freelocale, void, (locale_t locale) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (freelocale, void, (locale_t locale));
+# else
+#  if @HAVE_FREELOCALE@
+/* Need to cast, because on FreeBSD and Mac OS X 10.13, the return type is
+                                   int.  */
+_GL_CXXALIAS_SYS_CAST (freelocale, void, (locale_t locale));
+#  endif
+# endif
+# if @HAVE_FREELOCALE@
+_GL_CXXALIASWARN (freelocale);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef freelocale
+# if HAVE_RAW_DECL_FREELOCALE
+_GL_WARN_ON_USE (freelocale, "freelocale is not portable");
+# endif
+#endif
+
+#endif /* _@GUARD_PREFIX@_LOCALE_H */
+#endif /* _@GUARD_PREFIX@_LOCALE_H */
+#endif /* !(__need_locale_t || _GL_ALREADY_INCLUDING_LOCALE_H) */
diff --git a/src/grep/lib/localeconv.c b/src/grep/lib/localeconv.c
new file mode 100644
index 0000000..25e95a1
--- /dev/null
+++ b/src/grep/lib/localeconv.c
@@ -0,0 +1,103 @@
+/* Query locale dependent information for formatting numbers.
+   Copyright (C) 2012-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <locale.h>
+
+#if HAVE_STRUCT_LCONV_DECIMAL_POINT
+
+/* Override for platforms where 'struct lconv' lacks the int_p_*, int_n_*
+   members.  */
+
+struct lconv *
+localeconv (void)
+{
+  static struct lconv result;
+# undef lconv
+# undef localeconv
+  struct lconv *sys_result = localeconv ();
+
+  result.decimal_point = sys_result->decimal_point;
+  result.thousands_sep = sys_result->thousands_sep;
+  result.grouping = sys_result->grouping;
+  result.mon_decimal_point = sys_result->mon_decimal_point;
+  result.mon_thousands_sep = sys_result->mon_thousands_sep;
+  result.mon_grouping = sys_result->mon_grouping;
+  result.positive_sign = sys_result->positive_sign;
+  result.negative_sign = sys_result->negative_sign;
+  result.currency_symbol = sys_result->currency_symbol;
+  result.frac_digits = sys_result->frac_digits;
+  result.p_cs_precedes = sys_result->p_cs_precedes;
+  result.p_sign_posn = sys_result->p_sign_posn;
+  result.p_sep_by_space = sys_result->p_sep_by_space;
+  result.n_cs_precedes = sys_result->n_cs_precedes;
+  result.n_sign_posn = sys_result->n_sign_posn;
+  result.n_sep_by_space = sys_result->n_sep_by_space;
+  result.int_curr_symbol = sys_result->int_curr_symbol;
+  result.int_frac_digits = sys_result->int_frac_digits;
+  result.int_p_cs_precedes = sys_result->p_cs_precedes;
+  result.int_p_sign_posn = sys_result->p_sign_posn;
+  result.int_p_sep_by_space = sys_result->p_sep_by_space;
+  result.int_n_cs_precedes = sys_result->n_cs_precedes;
+  result.int_n_sign_posn = sys_result->n_sign_posn;
+  result.int_n_sep_by_space = sys_result->n_sep_by_space;
+
+  return &result;
+}
+
+#else
+
+/* Override for platforms where 'struct lconv' is a dummy.  */
+
+# include <limits.h>
+
+struct lconv *
+localeconv (void)
+{
+  static /*const*/ struct lconv result =
+    {
+      /* decimal_point */ ".",
+      /* thousands_sep */ "",
+      /* grouping */ "",
+      /* mon_decimal_point */ "",
+      /* mon_thousands_sep */ "",
+      /* mon_grouping */ "",
+      /* positive_sign */ "",
+      /* negative_sign */ "",
+      /* currency_symbol */ "",
+      /* frac_digits */ CHAR_MAX,
+      /* p_cs_precedes */ CHAR_MAX,
+      /* p_sign_posn */ CHAR_MAX,
+      /* p_sep_by_space */ CHAR_MAX,
+      /* n_cs_precedes */ CHAR_MAX,
+      /* n_sign_posn */ CHAR_MAX,
+      /* n_sep_by_space */ CHAR_MAX,
+      /* int_curr_symbol */ "",
+      /* int_frac_digits */ CHAR_MAX,
+      /* int_p_cs_precedes */ CHAR_MAX,
+      /* int_p_sign_posn */ CHAR_MAX,
+      /* int_p_sep_by_space */ CHAR_MAX,
+      /* int_n_cs_precedes */ CHAR_MAX,
+      /* int_n_sign_posn */ CHAR_MAX,
+      /* int_n_sep_by_space */ CHAR_MAX
+    };
+
+  return &result;
+}
+
+#endif
diff --git a/src/grep/lib/localeinfo.c b/src/grep/lib/localeinfo.c
new file mode 100644
index 0000000..4996018
--- /dev/null
+++ b/src/grep/lib/localeinfo.c
@@ -0,0 +1,151 @@
+/* locale information
+
+   Copyright 2016-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+/* Written by Paul Eggert.  */
+
+#include <config.h>
+
+#include <localeinfo.h>
+
+#include <verify.h>
+
+#include <limits.h>
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wctype.h>
+
+/* The sbclen implementation relies on this.  */
+verify (MB_LEN_MAX <= SCHAR_MAX);
+
+/* Return true if the locale uses UTF-8.  */
+
+static bool
+is_using_utf8 (void)
+{
+  wchar_t wc;
+  mbstate_t mbs = {0};
+  return mbrtowc (&wc, "\xc4\x80", 2, &mbs) == 2 && wc == 0x100;
+}
+
+/* Return true if the locale is compatible enough with the C locale so
+   that the locale is single-byte, bytes are in collating-sequence
+   order, and there are no multi-character collating elements.  */
+
+static bool
+using_simple_locale (bool multibyte)
+{
+  /* The native character set is known to be compatible with
+     the C locale.  The following test isn't perfect, but it's good
+     enough in practice, as only ASCII and EBCDIC are in common use
+     and this test correctly accepts ASCII and rejects EBCDIC.  */
+  enum { native_c_charset =
+    ('\b' == 8 && '\t' == 9 && '\n' == 10 && '\v' == 11 && '\f' == 12
+     && '\r' == 13 && ' ' == 32 && '!' == 33 && '"' == 34 && '#' == 35
+     && '%' == 37 && '&' == 38 && '\'' == 39 && '(' == 40 && ')' == 41
+     && '*' == 42 && '+' == 43 && ',' == 44 && '-' == 45 && '.' == 46
+     && '/' == 47 && '0' == 48 && '9' == 57 && ':' == 58 && ';' == 59
+     && '<' == 60 && '=' == 61 && '>' == 62 && '?' == 63 && 'A' == 65
+     && 'Z' == 90 && '[' == 91 && '\\' == 92 && ']' == 93 && '^' == 94
+     && '_' == 95 && 'a' == 97 && 'z' == 122 && '{' == 123 && '|' == 124
+     && '}' == 125 && '~' == 126)
+  };
+
+  if (!native_c_charset || multibyte)
+    return false;
+
+  /* As a heuristic, use strcoll to compare native character order.
+     If this agrees with byte order the locale should be simple.
+     This heuristic should work for all known practical locales,
+     although it would be invalid for artificially-constructed locales
+     where the native order is the collating-sequence order but there
+     are multi-character collating elements.  */
+  for (int i = 0; i < UCHAR_MAX; i++)
+    if (0 <= strcoll (((char []) {i, 0}), ((char []) {i + 1, 0})))
+      return false;
+
+  return true;
+}
+
+/* Initialize *LOCALEINFO from the current locale.  */
+
+void
+init_localeinfo (struct localeinfo *localeinfo)
+{
+  localeinfo->multibyte = MB_CUR_MAX > 1;
+  localeinfo->simple = using_simple_locale (localeinfo->multibyte);
+  localeinfo->using_utf8 = is_using_utf8 ();
+
+  for (int i = CHAR_MIN; i <= CHAR_MAX; i++)
+    {
+      char c = i;
+      unsigned char uc = i;
+      mbstate_t s = {0};
+      wchar_t wc;
+      size_t len = mbrtowc (&wc, &c, 1, &s);
+      localeinfo->sbclen[uc] = len <= 1 ? 1 : - (int) - len;
+      localeinfo->sbctowc[uc] = len <= 1 ? wc : WEOF;
+    }
+}
+
+/* The set of wchar_t values C such that there's a useful locale
+   somewhere where C != towupper (C) && C != towlower (towupper (C)).
+   For example, 0x00B5 (U+00B5 MICRO SIGN) is in this table, because
+   towupper (0x00B5) == 0x039C (U+039C GREEK CAPITAL LETTER MU), and
+   towlower (0x039C) == 0x03BC (U+03BC GREEK SMALL LETTER MU).  */
+static short const lonesome_lower[] =
+  {
+    0x00B5, 0x0131, 0x017F, 0x01C5, 0x01C8, 0x01CB, 0x01F2, 0x0345,
+    0x03C2, 0x03D0, 0x03D1, 0x03D5, 0x03D6, 0x03F0, 0x03F1,
+
+    /* U+03F2 GREEK LUNATE SIGMA SYMBOL lacks a specific uppercase
+       counterpart in locales predating Unicode 4.0.0 (April 2003).  */
+    0x03F2,
+
+    0x03F5, 0x1E9B, 0x1FBE,
+  };
+
+/* Verify that the worst case fits.  This is 1 for towupper, 1 for
+   towlower, and 1 for each entry in LONESOME_LOWER.  */
+verify (1 + 1 + sizeof lonesome_lower / sizeof *lonesome_lower
+        <= CASE_FOLDED_BUFSIZE);
+
+/* Find the characters equal to C after case-folding, other than C
+   itself, and store them into FOLDED.  Return the number of characters
+   stored; this is zero if C is WEOF.  */
+
+int
+case_folded_counterparts (wint_t c, wchar_t folded[CASE_FOLDED_BUFSIZE])
+{
+  int i;
+  int n = 0;
+  wint_t uc = towupper (c);
+  wint_t lc = towlower (uc);
+  if (uc != c)
+    folded[n++] = uc;
+  if (lc != uc && lc != c && towupper (lc) == uc)
+    folded[n++] = lc;
+  for (i = 0; i < sizeof lonesome_lower / sizeof *lonesome_lower; i++)
+    {
+      wint_t li = lonesome_lower[i];
+      if (li != lc && li != uc && li != c && towupper (li) == uc)
+        folded[n++] = li;
+    }
+  return n;
+}
diff --git a/src/grep/lib/localeinfo.h b/src/grep/lib/localeinfo.h
new file mode 100644
index 0000000..5013612
--- /dev/null
+++ b/src/grep/lib/localeinfo.h
@@ -0,0 +1,60 @@
+/* locale information
+
+   Copyright 2016-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+/* Written by Paul Eggert.  */
+
+#include <limits.h>
+#include <stdbool.h>
+#include <wchar.h>
+
+struct localeinfo
+{
+  /* MB_CUR_MAX > 1.  */
+  bool multibyte;
+
+  /* The locale is simple, like the C locale.  These locales can be
+     processed more efficiently, as they are single-byte, their native
+     character set is in collating-sequence order, and they do not
+     have multi-character collating elements.  */
+  bool simple;
+
+  /* The locale uses UTF-8.  */
+  bool using_utf8;
+
+  /* An array indexed by byte values B that contains 1 if B is a
+     single-byte character, -1 if B is an encoding error, and -2 if B
+     is the leading byte of a multibyte character that contains more
+     than one byte.  */
+  signed char sbclen[UCHAR_MAX + 1];
+
+  /* An array indexed by byte values B that contains the corresponding
+     wide character (if any) for B if sbclen[B] == 1.  WEOF means the
+     byte is not a valid single-byte character, i.e., sbclen[B] == -1
+     or -2.  */
+  wint_t sbctowc[UCHAR_MAX + 1];
+};
+
+extern void init_localeinfo (struct localeinfo *);
+
+/* Maximum number of characters that can be the case-folded
+   counterparts of a single character, not counting the character
+   itself.  This is a generous upper bound.  */
+enum { CASE_FOLDED_BUFSIZE = 32 };
+
+extern int case_folded_counterparts (wint_t, wchar_t[CASE_FOLDED_BUFSIZE]);
diff --git a/src/grep/lib/lseek.c b/src/grep/lib/lseek.c
new file mode 100644
index 0000000..0042546
--- /dev/null
+++ b/src/grep/lib/lseek.c
@@ -0,0 +1,71 @@
+/* An lseek() function that detects pipes.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Windows platforms.  */
+/* Get GetFileType.  */
+# include <windows.h>
+/* Get _get_osfhandle.  */
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+#else
+# include <sys/stat.h>
+#endif
+#include <errno.h>
+
+#undef lseek
+
+off_t
+rpl_lseek (int fd, off_t offset, int whence)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  /* mingw lseek mistakenly succeeds on pipes, sockets, and terminals.  */
+  HANDLE h = (HANDLE) _get_osfhandle (fd);
+  if (h == INVALID_HANDLE_VALUE)
+    {
+      errno = EBADF;
+      return -1;
+    }
+  if (GetFileType (h) != FILE_TYPE_DISK)
+    {
+      errno = ESPIPE;
+      return -1;
+    }
+#else
+  /* BeOS lseek mistakenly succeeds on pipes...  */
+  struct stat statbuf;
+  if (fstat (fd, &statbuf) < 0)
+    return -1;
+  if (!S_ISREG (statbuf.st_mode))
+    {
+      errno = ESPIPE;
+      return -1;
+    }
+#endif
+#if _GL_WINDOWS_64_BIT_OFF_T || (defined __MINGW32__ && defined _FILE_OFFSET_BITS && (_FILE_OFFSET_BITS == 64))
+  return _lseeki64 (fd, offset, whence);
+#else
+  return lseek (fd, offset, whence);
+#endif
+}
diff --git a/src/grep/lib/lstat.c b/src/grep/lib/lstat.c
new file mode 100644
index 0000000..7de0bf1
--- /dev/null
+++ b/src/grep/lib/lstat.c
@@ -0,0 +1,104 @@
+/* Work around a bug of lstat on some systems
+
+   Copyright (C) 1997-2006, 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering */
+
+/* If the user's config.h happens to include <sys/stat.h>, let it include only
+   the system's <sys/stat.h> here, so that orig_lstat doesn't recurse to
+   rpl_lstat.  */
+#define __need_system_sys_stat_h
+#include <config.h>
+
+#if !HAVE_LSTAT
+/* On systems that lack symlinks, our replacement <sys/stat.h> already
+   defined lstat as stat, so there is nothing further to do other than
+   avoid an empty file.  */
+typedef int dummy;
+#else /* HAVE_LSTAT */
+
+/* Get the original definition of lstat.  It might be defined as a macro.  */
+# include <sys/types.h>
+# include <sys/stat.h>
+# undef __need_system_sys_stat_h
+
+static int
+orig_lstat (const char *filename, struct stat *buf)
+{
+  return lstat (filename, buf);
+}
+
+/* Specification.  */
+# ifdef __osf__
+/* Write "sys/stat.h" here, not <sys/stat.h>, otherwise OSF/1 5.1 DTK cc
+   eliminates this include because of the preliminary #include <sys/stat.h>
+   above.  */
+#  include "sys/stat.h"
+# else
+#  include <sys/stat.h>
+# endif
+
+# include "stat-time.h"
+
+# include <string.h>
+# include <errno.h>
+
+/* lstat works differently on Linux and Solaris systems.  POSIX (see
+   "pathname resolution" in the glossary) requires that programs like
+   'ls' take into consideration the fact that FILE has a trailing slash
+   when FILE is a symbolic link.  On Linux and Solaris 10 systems, the
+   lstat function already has the desired semantics (in treating
+   'lstat ("symlink/", sbuf)' just like 'lstat ("symlink/.", sbuf)',
+   but on Solaris 9 and earlier it does not.
+
+   If FILE has a trailing slash and specifies a symbolic link,
+   then use stat() to get more info on the referent of FILE.
+   If the referent is a non-directory, then set errno to ENOTDIR
+   and return -1.  Otherwise, return stat's result.  */
+
+int
+rpl_lstat (const char *file, struct stat *sbuf)
+{
+  int result = orig_lstat (file, sbuf);
+
+  /* This replacement file can blindly check against '/' rather than
+     using the ISSLASH macro, because all platforms with '\\' either
+     lack symlinks (mingw) or have working lstat (cygwin) and thus do
+     not compile this file.  0 len should have already been filtered
+     out above, with a failure return of ENOENT.  */
+  if (result == 0)
+    {
+      if (S_ISDIR (sbuf->st_mode) || file[strlen (file) - 1] != '/')
+        result = stat_time_normalize (result, sbuf);
+      else
+        {
+          /* At this point, a trailing slash is permitted only on
+             symlink-to-dir; but it should have found information on the
+             directory, not the symlink.  Call 'stat' to get info about the
+             link's referent.  Our replacement stat guarantees valid results,
+             even if the symlink is not pointing to a directory.  */
+          if (!S_ISLNK (sbuf->st_mode))
+            {
+              errno = ENOTDIR;
+              return -1;
+            }
+          result = stat (file, sbuf);
+        }
+    }
+  return result;
+}
+
+#endif /* HAVE_LSTAT */
diff --git a/src/grep/lib/malloc.c b/src/grep/lib/malloc.c
new file mode 100644
index 0000000..0d8b359
--- /dev/null
+++ b/src/grep/lib/malloc.c
@@ -0,0 +1,51 @@
+/* malloc() function that is glibc compatible.
+
+   Copyright (C) 1997-1998, 2006-2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering and Bruno Haible */
+
+#define _GL_USE_STDLIB_ALLOC 1
+#include <config.h>
+
+#include <stdlib.h>
+
+#include <errno.h>
+
+#include "xalloc-oversized.h"
+
+/* Allocate an N-byte block of memory from the heap, even if N is 0.  */
+
+void *
+rpl_malloc (size_t n)
+{
+  if (n == 0)
+    n = 1;
+
+  if (xalloc_oversized (n, 1))
+    {
+      errno = ENOMEM;
+      return NULL;
+    }
+
+  void *result = malloc (n);
+
+#if !HAVE_MALLOC_POSIX
+  if (result == NULL)
+    errno = ENOMEM;
+#endif
+
+  return result;
+}
diff --git a/src/grep/lib/malloc/dynarray-skeleton.c b/src/grep/lib/malloc/dynarray-skeleton.c
new file mode 100644
index 0000000..48210e3
--- /dev/null
+++ b/src/grep/lib/malloc/dynarray-skeleton.c
@@ -0,0 +1,528 @@
+/* Type-safe arrays which grow dynamically.
+   Copyright (C) 2017-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+/* Pre-processor macros which act as parameters:
+
+   DYNARRAY_STRUCT
+      The struct tag of dynamic array to be defined.
+   DYNARRAY_ELEMENT
+      The type name of the element type.  Elements are copied
+      as if by memcpy, and can change address as the dynamic
+      array grows.
+   DYNARRAY_PREFIX
+      The prefix of the functions which are defined.
+
+   The following parameters are optional:
+
+   DYNARRAY_ELEMENT_FREE
+      DYNARRAY_ELEMENT_FREE (E) is evaluated to deallocate the
+      contents of elements. E is of type  DYNARRAY_ELEMENT *.
+   DYNARRAY_ELEMENT_INIT
+      DYNARRAY_ELEMENT_INIT (E) is evaluated to initialize a new
+      element.  E is of type  DYNARRAY_ELEMENT *.
+      If DYNARRAY_ELEMENT_FREE but not DYNARRAY_ELEMENT_INIT is
+      defined, new elements are automatically zero-initialized.
+      Otherwise, new elements have undefined contents.
+   DYNARRAY_INITIAL_SIZE
+      The size of the statically allocated array (default:
+      at least 2, more elements if they fit into 128 bytes).
+      Must be a preprocessor constant.  If DYNARRAY_INITIAL_SIZE is 0,
+      there is no statically allocated array at, and all non-empty
+      arrays are heap-allocated.
+   DYNARRAY_FINAL_TYPE
+      The name of the type which holds the final array.  If not
+      defined, is PREFIX##finalize not provided.  DYNARRAY_FINAL_TYPE
+      must be a struct type, with members of type DYNARRAY_ELEMENT and
+      size_t at the start (in this order).
+
+   These macros are undefined after this header file has been
+   included.
+
+   The following types are provided (their members are private to the
+   dynarray implementation):
+
+     struct DYNARRAY_STRUCT
+
+   The following functions are provided:
+
+     void DYNARRAY_PREFIX##init (struct DYNARRAY_STRUCT *);
+     void DYNARRAY_PREFIX##free (struct DYNARRAY_STRUCT *);
+     bool DYNARRAY_PREFIX##has_failed (const struct DYNARRAY_STRUCT *);
+     void DYNARRAY_PREFIX##mark_failed (struct DYNARRAY_STRUCT *);
+     size_t DYNARRAY_PREFIX##size (const struct DYNARRAY_STRUCT *);
+     DYNARRAY_ELEMENT *DYNARRAY_PREFIX##begin (const struct DYNARRAY_STRUCT *);
+     DYNARRAY_ELEMENT *DYNARRAY_PREFIX##end (const struct DYNARRAY_STRUCT *);
+     DYNARRAY_ELEMENT *DYNARRAY_PREFIX##at (struct DYNARRAY_STRUCT *, size_t);
+     void DYNARRAY_PREFIX##add (struct DYNARRAY_STRUCT *, DYNARRAY_ELEMENT);
+     DYNARRAY_ELEMENT *DYNARRAY_PREFIX##emplace (struct DYNARRAY_STRUCT *);
+     bool DYNARRAY_PREFIX##resize (struct DYNARRAY_STRUCT *, size_t);
+     void DYNARRAY_PREFIX##remove_last (struct DYNARRAY_STRUCT *);
+     void DYNARRAY_PREFIX##clear (struct DYNARRAY_STRUCT *);
+
+   The following functions are provided are provided if the
+   prerequisites are met:
+
+     bool DYNARRAY_PREFIX##finalize (struct DYNARRAY_STRUCT *,
+                                     DYNARRAY_FINAL_TYPE *);
+       (if DYNARRAY_FINAL_TYPE is defined)
+     DYNARRAY_ELEMENT *DYNARRAY_PREFIX##finalize (struct DYNARRAY_STRUCT *,
+                                                  size_t *);
+       (if DYNARRAY_FINAL_TYPE is not defined)
+*/
+
+#include <malloc/dynarray.h>
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifndef DYNARRAY_STRUCT
+# error "DYNARRAY_STRUCT must be defined"
+#endif
+
+#ifndef DYNARRAY_ELEMENT
+# error "DYNARRAY_ELEMENT must be defined"
+#endif
+
+#ifndef DYNARRAY_PREFIX
+# error "DYNARRAY_PREFIX must be defined"
+#endif
+
+#ifdef DYNARRAY_INITIAL_SIZE
+# if DYNARRAY_INITIAL_SIZE < 0
+#  error "DYNARRAY_INITIAL_SIZE must be non-negative"
+# endif
+# if DYNARRAY_INITIAL_SIZE > 0
+#  define DYNARRAY_HAVE_SCRATCH 1
+# else
+#  define DYNARRAY_HAVE_SCRATCH 0
+# endif
+#else
+/* Provide a reasonable default which limits the size of
+   DYNARRAY_STRUCT.  */
+# define DYNARRAY_INITIAL_SIZE \
+  (sizeof (DYNARRAY_ELEMENT) > 64 ? 2 : 128 / sizeof (DYNARRAY_ELEMENT))
+# define DYNARRAY_HAVE_SCRATCH 1
+#endif
+
+/* Public type definitions.  */
+
+/* All fields of this struct are private to the implementation.  */
+struct DYNARRAY_STRUCT
+{
+  union
+  {
+    struct dynarray_header dynarray_abstract;
+    struct
+    {
+      /* These fields must match struct dynarray_header.  */
+      size_t used;
+      size_t allocated;
+      DYNARRAY_ELEMENT *array;
+    } dynarray_header;
+  } u;
+
+#if DYNARRAY_HAVE_SCRATCH
+  /* Initial inline allocation.  */
+  DYNARRAY_ELEMENT scratch[DYNARRAY_INITIAL_SIZE];
+#endif
+};
+
+/* Internal use only: Helper macros.  */
+
+/* Ensure macro-expansion of DYNARRAY_PREFIX.  */
+#define DYNARRAY_CONCAT0(prefix, name) prefix##name
+#define DYNARRAY_CONCAT1(prefix, name) DYNARRAY_CONCAT0(prefix, name)
+#define DYNARRAY_NAME(name) DYNARRAY_CONCAT1(DYNARRAY_PREFIX, name)
+
+/* Use DYNARRAY_FREE instead of DYNARRAY_NAME (free),
+   so that Gnulib does not change 'free' to 'rpl_free'.  */
+#define DYNARRAY_FREE DYNARRAY_CONCAT1 (DYNARRAY_NAME (f), ree)
+
+/* Address of the scratch buffer if any.  */
+#if DYNARRAY_HAVE_SCRATCH
+# define DYNARRAY_SCRATCH(list) (list)->scratch
+#else
+# define DYNARRAY_SCRATCH(list) NULL
+#endif
+
+/* Internal use only: Helper functions.  */
+
+/* Internal function.  Call DYNARRAY_ELEMENT_FREE with the array
+   elements.  Name mangling needed due to the DYNARRAY_ELEMENT_FREE
+   macro expansion.  */
+static inline void
+DYNARRAY_NAME (free__elements__) (DYNARRAY_ELEMENT *__dynarray_array,
+                                  size_t __dynarray_used)
+{
+#ifdef DYNARRAY_ELEMENT_FREE
+  for (size_t __dynarray_i = 0; __dynarray_i < __dynarray_used; ++__dynarray_i)
+    DYNARRAY_ELEMENT_FREE (&__dynarray_array[__dynarray_i]);
+#endif /* DYNARRAY_ELEMENT_FREE */
+}
+
+/* Internal function.  Free the non-scratch array allocation.  */
+static inline void
+DYNARRAY_NAME (free__array__) (struct DYNARRAY_STRUCT *list)
+{
+#if DYNARRAY_HAVE_SCRATCH
+  if (list->u.dynarray_header.array != list->scratch)
+    free (list->u.dynarray_header.array);
+#else
+  free (list->u.dynarray_header.array);
+#endif
+}
+
+/* Public functions.  */
+
+/* Initialize a dynamic array object.  This must be called before any
+   use of the object.  */
+__attribute_nonnull__ ((1))
+static void
+DYNARRAY_NAME (init) (struct DYNARRAY_STRUCT *list)
+{
+  list->u.dynarray_header.used = 0;
+  list->u.dynarray_header.allocated = DYNARRAY_INITIAL_SIZE;
+  list->u.dynarray_header.array = DYNARRAY_SCRATCH (list);
+}
+
+/* Deallocate the dynamic array and its elements.  */
+__attribute_maybe_unused__ __attribute_nonnull__ ((1))
+static void
+DYNARRAY_FREE (struct DYNARRAY_STRUCT *list)
+{
+  DYNARRAY_NAME (free__elements__)
+    (list->u.dynarray_header.array, list->u.dynarray_header.used);
+  DYNARRAY_NAME (free__array__) (list);
+  DYNARRAY_NAME (init) (list);
+}
+
+/* Return true if the dynamic array is in an error state.  */
+__attribute_nonnull__ ((1))
+static inline bool
+DYNARRAY_NAME (has_failed) (const struct DYNARRAY_STRUCT *list)
+{
+  return list->u.dynarray_header.allocated == __dynarray_error_marker ();
+}
+
+/* Mark the dynamic array as failed.  All elements are deallocated as
+   a side effect.  */
+__attribute_nonnull__ ((1))
+static void
+DYNARRAY_NAME (mark_failed) (struct DYNARRAY_STRUCT *list)
+{
+  DYNARRAY_NAME (free__elements__)
+    (list->u.dynarray_header.array, list->u.dynarray_header.used);
+  DYNARRAY_NAME (free__array__) (list);
+  list->u.dynarray_header.array = DYNARRAY_SCRATCH (list);
+  list->u.dynarray_header.used = 0;
+  list->u.dynarray_header.allocated = __dynarray_error_marker ();
+}
+
+/* Return the number of elements which have been added to the dynamic
+   array.  */
+__attribute_nonnull__ ((1))
+static inline size_t
+DYNARRAY_NAME (size) (const struct DYNARRAY_STRUCT *list)
+{
+  return list->u.dynarray_header.used;
+}
+
+/* Return a pointer to the array element at INDEX.  Terminate the
+   process if INDEX is out of bounds.  */
+__attribute_nonnull__ ((1))
+static inline DYNARRAY_ELEMENT *
+DYNARRAY_NAME (at) (struct DYNARRAY_STRUCT *list, size_t index)
+{
+  if (__glibc_unlikely (index >= DYNARRAY_NAME (size) (list)))
+    __libc_dynarray_at_failure (DYNARRAY_NAME (size) (list), index);
+  return list->u.dynarray_header.array + index;
+}
+
+/* Return a pointer to the first array element, if any.  For a
+   zero-length array, the pointer can be NULL even though the dynamic
+   array has not entered the failure state.  */
+__attribute_nonnull__ ((1))
+static inline DYNARRAY_ELEMENT *
+DYNARRAY_NAME (begin) (struct DYNARRAY_STRUCT *list)
+{
+  return list->u.dynarray_header.array;
+}
+
+/* Return a pointer one element past the last array element.  For a
+   zero-length array, the pointer can be NULL even though the dynamic
+   array has not entered the failure state.  */
+__attribute_nonnull__ ((1))
+static inline DYNARRAY_ELEMENT *
+DYNARRAY_NAME (end) (struct DYNARRAY_STRUCT *list)
+{
+  return list->u.dynarray_header.array + list->u.dynarray_header.used;
+}
+
+/* Internal function.  Slow path for the add function below.  */
+static void
+DYNARRAY_NAME (add__) (struct DYNARRAY_STRUCT *list, DYNARRAY_ELEMENT item)
+{
+  if (__glibc_unlikely
+      (!__libc_dynarray_emplace_enlarge (&list->u.dynarray_abstract,
+                                         DYNARRAY_SCRATCH (list),
+                                         sizeof (DYNARRAY_ELEMENT))))
+    {
+      DYNARRAY_NAME (mark_failed) (list);
+      return;
+    }
+
+  /* Copy the new element and increase the array length.  */
+  list->u.dynarray_header.array[list->u.dynarray_header.used++] = item;
+}
+
+/* Add ITEM at the end of the array, enlarging it by one element.
+   Mark *LIST as failed if the dynamic array allocation size cannot be
+   increased.  */
+__attribute_nonnull__ ((1))
+static inline void
+DYNARRAY_NAME (add) (struct DYNARRAY_STRUCT *list, DYNARRAY_ELEMENT item)
+{
+  /* Do nothing in case of previous error.  */
+  if (DYNARRAY_NAME (has_failed) (list))
+    return;
+
+  /* Enlarge the array if necessary.  */
+  if (__glibc_unlikely (list->u.dynarray_header.used
+                        == list->u.dynarray_header.allocated))
+    {
+      DYNARRAY_NAME (add__) (list, item);
+      return;
+    }
+
+  /* Copy the new element and increase the array length.  */
+  list->u.dynarray_header.array[list->u.dynarray_header.used++] = item;
+}
+
+/* Internal function.  Building block for the emplace functions below.
+   Assumes space for one more element in *LIST.  */
+static inline DYNARRAY_ELEMENT *
+DYNARRAY_NAME (emplace__tail__) (struct DYNARRAY_STRUCT *list)
+{
+  DYNARRAY_ELEMENT *result
+    = &list->u.dynarray_header.array[list->u.dynarray_header.used];
+  ++list->u.dynarray_header.used;
+#if defined (DYNARRAY_ELEMENT_INIT)
+  DYNARRAY_ELEMENT_INIT (result);
+#elif defined (DYNARRAY_ELEMENT_FREE)
+  memset (result, 0, sizeof (*result));
+#endif
+  return result;
+}
+
+/* Internal function.  Slow path for the emplace function below.  */
+static DYNARRAY_ELEMENT *
+DYNARRAY_NAME (emplace__) (struct DYNARRAY_STRUCT *list)
+{
+  if (__glibc_unlikely
+      (!__libc_dynarray_emplace_enlarge (&list->u.dynarray_abstract,
+                                         DYNARRAY_SCRATCH (list),
+                                         sizeof (DYNARRAY_ELEMENT))))
+    {
+      DYNARRAY_NAME (mark_failed) (list);
+      return NULL;
+    }
+  return DYNARRAY_NAME (emplace__tail__) (list);
+}
+
+/* Allocate a place for a new element in *LIST and return a pointer to
+   it.  The pointer can be NULL if the dynamic array cannot be
+   enlarged due to a memory allocation failure.  */
+__attribute_maybe_unused__ __attribute_warn_unused_result__
+__attribute_nonnull__ ((1))
+static
+/* Avoid inlining with the larger initialization code.  */
+#if !(defined (DYNARRAY_ELEMENT_INIT) || defined (DYNARRAY_ELEMENT_FREE))
+inline
+#endif
+DYNARRAY_ELEMENT *
+DYNARRAY_NAME (emplace) (struct DYNARRAY_STRUCT *list)
+{
+  /* Do nothing in case of previous error.  */
+  if (DYNARRAY_NAME (has_failed) (list))
+    return NULL;
+
+  /* Enlarge the array if necessary.  */
+  if (__glibc_unlikely (list->u.dynarray_header.used
+                        == list->u.dynarray_header.allocated))
+    return (DYNARRAY_NAME (emplace__) (list));
+  return DYNARRAY_NAME (emplace__tail__) (list);
+}
+
+/* Change the size of *LIST to SIZE.  If SIZE is larger than the
+   existing size, new elements are added (which can be initialized).
+   Otherwise, the list is truncated, and elements are freed.  Return
+   false on memory allocation failure (and mark *LIST as failed).  */
+__attribute_maybe_unused__ __attribute_nonnull__ ((1))
+static bool
+DYNARRAY_NAME (resize) (struct DYNARRAY_STRUCT *list, size_t size)
+{
+  if (size > list->u.dynarray_header.used)
+    {
+      bool ok;
+#if defined (DYNARRAY_ELEMENT_INIT)
+      /* The new elements have to be initialized.  */
+      size_t old_size = list->u.dynarray_header.used;
+      ok = __libc_dynarray_resize (&list->u.dynarray_abstract,
+                                   size, DYNARRAY_SCRATCH (list),
+                                   sizeof (DYNARRAY_ELEMENT));
+      if (ok)
+        for (size_t i = old_size; i < size; ++i)
+          {
+            DYNARRAY_ELEMENT_INIT (&list->u.dynarray_header.array[i]);
+          }
+#elif defined (DYNARRAY_ELEMENT_FREE)
+      /* Zero initialization is needed so that the elements can be
+         safely freed.  */
+      ok = __libc_dynarray_resize_clear
+        (&list->u.dynarray_abstract, size,
+         DYNARRAY_SCRATCH (list), sizeof (DYNARRAY_ELEMENT));
+#else
+      ok =  __libc_dynarray_resize (&list->u.dynarray_abstract,
+                                    size, DYNARRAY_SCRATCH (list),
+                                    sizeof (DYNARRAY_ELEMENT));
+#endif
+      if (__glibc_unlikely (!ok))
+        DYNARRAY_NAME (mark_failed) (list);
+      return ok;
+    }
+  else
+    {
+      /* The list has shrunk in size.  Free the removed elements.  */
+      DYNARRAY_NAME (free__elements__)
+        (list->u.dynarray_header.array + size,
+         list->u.dynarray_header.used - size);
+      list->u.dynarray_header.used = size;
+      return true;
+    }
+}
+
+/* Remove the last element of LIST if it is present.  */
+__attribute_maybe_unused__ __attribute_nonnull__ ((1))
+static void
+DYNARRAY_NAME (remove_last) (struct DYNARRAY_STRUCT *list)
+{
+  /* used > 0 implies that the array is the non-failed state.  */
+  if (list->u.dynarray_header.used > 0)
+    {
+      size_t new_length = list->u.dynarray_header.used - 1;
+#ifdef DYNARRAY_ELEMENT_FREE
+      DYNARRAY_ELEMENT_FREE (&list->u.dynarray_header.array[new_length]);
+#endif
+      list->u.dynarray_header.used = new_length;
+    }
+}
+
+/* Remove all elements from the list.  The elements are freed, but the
+   list itself is not.  */
+__attribute_maybe_unused__ __attribute_nonnull__ ((1))
+static void
+DYNARRAY_NAME (clear) (struct DYNARRAY_STRUCT *list)
+{
+  /* free__elements__ does nothing if the list is in the failed
+     state.  */
+  DYNARRAY_NAME (free__elements__)
+    (list->u.dynarray_header.array, list->u.dynarray_header.used);
+  list->u.dynarray_header.used = 0;
+}
+
+#ifdef DYNARRAY_FINAL_TYPE
+/* Transfer the dynamic array to a permanent location at *RESULT.
+   Returns true on success on false on allocation failure.  In either
+   case, *LIST is re-initialized and can be reused.  A NULL pointer is
+   stored in *RESULT if LIST refers to an empty list.  On success, the
+   pointer in *RESULT is heap-allocated and must be deallocated using
+   free.  */
+__attribute_maybe_unused__ __attribute_warn_unused_result__
+__attribute_nonnull__ ((1, 2))
+static bool
+DYNARRAY_NAME (finalize) (struct DYNARRAY_STRUCT *list,
+                          DYNARRAY_FINAL_TYPE *result)
+{
+  struct dynarray_finalize_result res;
+  if (__libc_dynarray_finalize (&list->u.dynarray_abstract,
+                                DYNARRAY_SCRATCH (list),
+                                sizeof (DYNARRAY_ELEMENT), &res))
+    {
+      /* On success, the result owns all the data.  */
+      DYNARRAY_NAME (init) (list);
+      *result = (DYNARRAY_FINAL_TYPE) { res.array, res.length };
+      return true;
+    }
+  else
+    {
+      /* On error, we need to free all data.  */
+      DYNARRAY_FREE (list);
+      errno = ENOMEM;
+      return false;
+    }
+}
+#else /* !DYNARRAY_FINAL_TYPE */
+/* Transfer the dynamic array to a heap-allocated array and return a
+   pointer to it.  The pointer is NULL if memory allocation fails, or
+   if the array is empty, so this function should be used only for
+   arrays which are known not be empty (usually because they always
+   have a sentinel at the end).  If LENGTHP is not NULL, the array
+   length is written to *LENGTHP.  *LIST is re-initialized and can be
+   reused.  */
+__attribute_maybe_unused__ __attribute_warn_unused_result__
+__attribute_nonnull__ ((1))
+static DYNARRAY_ELEMENT *
+DYNARRAY_NAME (finalize) (struct DYNARRAY_STRUCT *list, size_t *lengthp)
+{
+  struct dynarray_finalize_result res;
+  if (__libc_dynarray_finalize (&list->u.dynarray_abstract,
+                                DYNARRAY_SCRATCH (list),
+                                sizeof (DYNARRAY_ELEMENT), &res))
+    {
+      /* On success, the result owns all the data.  */
+      DYNARRAY_NAME (init) (list);
+      if (lengthp != NULL)
+        *lengthp = res.length;
+      return res.array;
+    }
+  else
+    {
+      /* On error, we need to free all data.  */
+      DYNARRAY_FREE (list);
+      errno = ENOMEM;
+      return NULL;
+    }
+}
+#endif /* !DYNARRAY_FINAL_TYPE */
+
+/* Undo macro definitions.  */
+
+#undef DYNARRAY_CONCAT0
+#undef DYNARRAY_CONCAT1
+#undef DYNARRAY_NAME
+#undef DYNARRAY_SCRATCH
+#undef DYNARRAY_HAVE_SCRATCH
+
+#undef DYNARRAY_STRUCT
+#undef DYNARRAY_ELEMENT
+#undef DYNARRAY_PREFIX
+#undef DYNARRAY_ELEMENT_FREE
+#undef DYNARRAY_ELEMENT_INIT
+#undef DYNARRAY_INITIAL_SIZE
+#undef DYNARRAY_FINAL_TYPE
diff --git a/src/grep/lib/malloc/dynarray.h b/src/grep/lib/malloc/dynarray.h
new file mode 100644
index 0000000..638c33f
--- /dev/null
+++ b/src/grep/lib/malloc/dynarray.h
@@ -0,0 +1,178 @@
+/* Type-safe arrays which grow dynamically.  Shared definitions.
+   Copyright (C) 2017-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+/* To use the dynarray facility, you need to include
+   <malloc/dynarray-skeleton.c> and define the parameter macros
+   documented in that file.
+
+   A minimal example which provides a growing list of integers can be
+   defined like this:
+
+     struct int_array
+     {
+       // Pointer to result array followed by its length,
+       // as required by DYNARRAY_FINAL_TYPE.
+       int *array;
+       size_t length;
+     };
+
+     #define DYNARRAY_STRUCT dynarray_int
+     #define DYNARRAY_ELEMENT int
+     #define DYNARRAY_PREFIX dynarray_int_
+     #define DYNARRAY_FINAL_TYPE struct int_array
+     #include <malloc/dynarray-skeleton.c>
+
+   To create a three-element array with elements 1, 2, 3, use this
+   code:
+
+     struct dynarray_int dyn;
+     dynarray_int_init (&dyn);
+     for (int i = 1; i <= 3; ++i)
+       {
+         int *place = dynarray_int_emplace (&dyn);
+         assert (place != NULL);
+         *place = i;
+       }
+     struct int_array result;
+     bool ok = dynarray_int_finalize (&dyn, &result);
+     assert (ok);
+     assert (result.length == 3);
+     assert (result.array[0] == 1);
+     assert (result.array[1] == 2);
+     assert (result.array[2] == 3);
+     free (result.array);
+
+   If the elements contain resources which must be freed, define
+   DYNARRAY_ELEMENT_FREE appropriately, like this:
+
+     struct str_array
+     {
+       char **array;
+       size_t length;
+     };
+
+     #define DYNARRAY_STRUCT dynarray_str
+     #define DYNARRAY_ELEMENT char *
+     #define DYNARRAY_ELEMENT_FREE(ptr) free (*ptr)
+     #define DYNARRAY_PREFIX dynarray_str_
+     #define DYNARRAY_FINAL_TYPE struct str_array
+     #include <malloc/dynarray-skeleton.c>
+
+   Compared to scratch buffers, dynamic arrays have the following
+   features:
+
+   - They have an element type, and are not just an untyped buffer of
+     bytes.
+
+   - When growing, previously stored elements are preserved.  (It is
+     expected that scratch_buffer_grow_preserve and
+     scratch_buffer_set_array_size eventually go away because all
+     current users are moved to dynamic arrays.)
+
+   - Scratch buffers have a more aggressive growth policy because
+     growing them typically means a retry of an operation (across an
+     NSS service module boundary), which is expensive.
+
+   - For the same reason, scratch buffers have a much larger initial
+     stack allocation.  */
+
+#ifndef _DYNARRAY_H
+#define _DYNARRAY_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <string.h>
+
+struct dynarray_header
+{
+  size_t used;
+  size_t allocated;
+  void *array;
+};
+
+/* Marker used in the allocated member to indicate that an error was
+   encountered.  */
+static inline size_t
+__dynarray_error_marker (void)
+{
+  return -1;
+}
+
+/* Internal function.  See the has_failed function in
+   dynarray-skeleton.c.  */
+static inline bool
+__dynarray_error (struct dynarray_header *list)
+{
+  return list->allocated == __dynarray_error_marker ();
+}
+
+/* Internal function.  Enlarge the dynamically allocated area of the
+   array to make room for one more element.  SCRATCH is a pointer to
+   the scratch area (which is not heap-allocated and must not be
+   freed).  ELEMENT_SIZE is the size, in bytes, of one element.
+   Return false on failure, true on success.  */
+bool __libc_dynarray_emplace_enlarge (struct dynarray_header *,
+                                      void *scratch, size_t element_size);
+
+/* Internal function.  Enlarge the dynamically allocated area of the
+   array to make room for at least SIZE elements (which must be larger
+   than the existing used part of the dynamic array).  SCRATCH is a
+   pointer to the scratch area (which is not heap-allocated and must
+   not be freed).  ELEMENT_SIZE is the size, in bytes, of one element.
+   Return false on failure, true on success.  */
+bool __libc_dynarray_resize (struct dynarray_header *, size_t size,
+                             void *scratch, size_t element_size);
+
+/* Internal function.  Like __libc_dynarray_resize, but clear the new
+   part of the dynamic array.  */
+bool __libc_dynarray_resize_clear (struct dynarray_header *, size_t size,
+                                   void *scratch, size_t element_size);
+
+/* Internal type.  */
+struct dynarray_finalize_result
+{
+  void *array;
+  size_t length;
+};
+
+/* Internal function.  Copy the dynamically-allocated area to an
+   explicitly-sized heap allocation.  SCRATCH is a pointer to the
+   embedded scratch space.  ELEMENT_SIZE is the size, in bytes, of the
+   element type.  On success, true is returned, and pointer and length
+   are written to *RESULT.  On failure, false is returned.  The caller
+   has to take care of some of the memory management; this function is
+   expected to be called from dynarray-skeleton.c.  */
+bool __libc_dynarray_finalize (struct dynarray_header *list, void *scratch,
+                               size_t element_size,
+                               struct dynarray_finalize_result *result);
+
+
+/* Internal function.  Terminate the process after an index error.
+   SIZE is the number of elements of the dynamic array.  INDEX is the
+   lookup index which triggered the failure.  */
+_Noreturn void __libc_dynarray_at_failure (size_t size, size_t index);
+
+#ifndef _ISOMAC
+libc_hidden_proto (__libc_dynarray_emplace_enlarge)
+libc_hidden_proto (__libc_dynarray_resize)
+libc_hidden_proto (__libc_dynarray_resize_clear)
+libc_hidden_proto (__libc_dynarray_finalize)
+libc_hidden_proto (__libc_dynarray_at_failure)
+#endif
+
+#endif /* _DYNARRAY_H */
diff --git a/src/grep/lib/malloc/dynarray_at_failure.c b/src/grep/lib/malloc/dynarray_at_failure.c
new file mode 100644
index 0000000..4f840db
--- /dev/null
+++ b/src/grep/lib/malloc/dynarray_at_failure.c
@@ -0,0 +1,39 @@
+/* Report an dynamic array index out of bounds condition.
+   Copyright (C) 2017-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _LIBC
+# include <libc-config.h>
+#endif
+
+#include <dynarray.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+void
+__libc_dynarray_at_failure (size_t size, size_t index)
+{
+#ifdef _LIBC
+  char buf[200];
+  __snprintf (buf, sizeof (buf), "Fatal glibc error: "
+              "array index %zu not less than array length %zu\n",
+              index, size);
+#else
+ abort ();
+#endif
+}
+libc_hidden_def (__libc_dynarray_at_failure)
diff --git a/src/grep/lib/malloc/dynarray_emplace_enlarge.c b/src/grep/lib/malloc/dynarray_emplace_enlarge.c
new file mode 100644
index 0000000..0f8baf9
--- /dev/null
+++ b/src/grep/lib/malloc/dynarray_emplace_enlarge.c
@@ -0,0 +1,77 @@
+/* Increase the size of a dynamic array in preparation of an emplace operation.
+   Copyright (C) 2017-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _LIBC
+# include <libc-config.h>
+#endif
+
+#include <dynarray.h>
+#include <errno.h>
+#include <intprops.h>
+#include <stdlib.h>
+#include <string.h>
+
+bool
+__libc_dynarray_emplace_enlarge (struct dynarray_header *list,
+                                 void *scratch, size_t element_size)
+{
+  size_t new_allocated;
+  if (list->allocated == 0)
+    {
+      /* No scratch buffer provided.  Choose a reasonable default
+         size.  */
+      if (element_size < 4)
+        new_allocated = 16;
+      else if (element_size < 8)
+        new_allocated = 8;
+      else
+        new_allocated = 4;
+    }
+  else
+    /* Increase the allocated size, using an exponential growth
+       policy.  */
+    {
+      new_allocated = list->allocated + list->allocated / 2 + 1;
+      if (new_allocated <= list->allocated)
+        {
+          /* Overflow.  */
+          __set_errno (ENOMEM);
+          return false;
+        }
+    }
+
+  size_t new_size;
+  if (INT_MULTIPLY_WRAPV (new_allocated, element_size, &new_size))
+    return false;
+  void *new_array;
+  if (list->array == scratch)
+    {
+      /* The previous array was not heap-allocated.  */
+      new_array = malloc (new_size);
+      if (new_array != NULL && list->array != NULL)
+        memcpy (new_array, list->array, list->used * element_size);
+    }
+  else
+    new_array = realloc (list->array, new_size);
+  if (new_array == NULL)
+    return false;
+  list->array = new_array;
+  list->allocated = new_allocated;
+  return true;
+}
+libc_hidden_def (__libc_dynarray_emplace_enlarge)
diff --git a/src/grep/lib/malloc/dynarray_finalize.c b/src/grep/lib/malloc/dynarray_finalize.c
new file mode 100644
index 0000000..c33da41
--- /dev/null
+++ b/src/grep/lib/malloc/dynarray_finalize.c
@@ -0,0 +1,66 @@
+/* Copy the dynamically-allocated area to an explicitly-sized heap allocation.
+   Copyright (C) 2017-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _LIBC
+# include <libc-config.h>
+#endif
+
+#include <dynarray.h>
+#include <stdlib.h>
+#include <string.h>
+
+bool
+__libc_dynarray_finalize (struct dynarray_header *list,
+                          void *scratch, size_t element_size,
+                          struct dynarray_finalize_result *result)
+{
+  if (__dynarray_error (list))
+    /* The caller will reported the deferred error.  */
+    return false;
+
+  size_t used = list->used;
+
+  /* Empty list.  */
+  if (used == 0)
+    {
+      /* An empty list could still be backed by a heap-allocated
+         array.  Free it if necessary.  */
+      if (list->array != scratch)
+        free (list->array);
+      *result = (struct dynarray_finalize_result) { NULL, 0 };
+      return true;
+    }
+
+  size_t allocation_size = used * element_size;
+  void *heap_array = malloc (allocation_size);
+  if (heap_array != NULL)
+    {
+      /* The new array takes ownership of the strings.  */
+      if (list->array != NULL)
+        memcpy (heap_array, list->array, allocation_size);
+      if (list->array != scratch)
+        free (list->array);
+      *result = (struct dynarray_finalize_result)
+        { .array = heap_array, .length = used };
+      return true;
+    }
+  else
+    /* The caller will perform the freeing operation.  */
+    return false;
+}
+libc_hidden_def (__libc_dynarray_finalize)
diff --git a/src/grep/lib/malloc/dynarray_resize.c b/src/grep/lib/malloc/dynarray_resize.c
new file mode 100644
index 0000000..5a57166
--- /dev/null
+++ b/src/grep/lib/malloc/dynarray_resize.c
@@ -0,0 +1,68 @@
+/* Increase the size of a dynamic array.
+   Copyright (C) 2017-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _LIBC
+# include <libc-config.h>
+#endif
+
+#include <dynarray.h>
+#include <errno.h>
+#include <intprops.h>
+#include <stdlib.h>
+#include <string.h>
+
+bool
+__libc_dynarray_resize (struct dynarray_header *list, size_t size,
+                        void *scratch, size_t element_size)
+{
+  /* The existing allocation provides sufficient room.  */
+  if (size <= list->allocated)
+    {
+      list->used = size;
+      return true;
+    }
+
+  /* Otherwise, use size as the new allocation size.  The caller is
+     expected to provide the final size of the array, so there is no
+     over-allocation here.  */
+
+  size_t new_size_bytes;
+  if (INT_MULTIPLY_WRAPV (size, element_size, &new_size_bytes))
+    {
+      /* Overflow.  */
+      __set_errno (ENOMEM);
+      return false;
+    }
+  void *new_array;
+  if (list->array == scratch)
+    {
+      /* The previous array was not heap-allocated.  */
+      new_array = malloc (new_size_bytes);
+      if (new_array != NULL && list->array != NULL)
+        memcpy (new_array, list->array, list->used * element_size);
+    }
+  else
+    new_array = realloc (list->array, new_size_bytes);
+  if (new_array == NULL)
+    return false;
+  list->array = new_array;
+  list->allocated = size;
+  list->used = size;
+  return true;
+}
+libc_hidden_def (__libc_dynarray_resize)
diff --git a/src/grep/lib/malloc/dynarray_resize_clear.c b/src/grep/lib/malloc/dynarray_resize_clear.c
new file mode 100644
index 0000000..9c43b00
--- /dev/null
+++ b/src/grep/lib/malloc/dynarray_resize_clear.c
@@ -0,0 +1,39 @@
+/* Increase the size of a dynamic array and clear the new part.
+   Copyright (C) 2017-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _LIBC
+# include <libc-config.h>
+#endif
+
+#include <dynarray.h>
+#include <string.h>
+
+bool
+__libc_dynarray_resize_clear (struct dynarray_header *list, size_t size,
+                              void *scratch, size_t element_size)
+{
+  size_t old_size = list->used;
+  if (!__libc_dynarray_resize (list, size, scratch, element_size))
+    return false;
+  /* __libc_dynarray_resize already checked for overflow.  */
+  char *array = list->array;
+  memset (array + (old_size * element_size), 0,
+          (size - old_size) * element_size);
+  return true;
+}
+libc_hidden_def (__libc_dynarray_resize_clear)
diff --git a/src/grep/lib/malloca.c b/src/grep/lib/malloca.c
new file mode 100644
index 0000000..b488423
--- /dev/null
+++ b/src/grep/lib/malloca.c
@@ -0,0 +1,113 @@
+/* Safe automatic memory allocation.
+   Copyright (C) 2003, 2006-2007, 2009-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2003, 2018.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#define _GL_USE_STDLIB_ALLOC 1
+#include <config.h>
+
+/* Specification.  */
+#include "malloca.h"
+
+#include "idx.h"
+#include "intprops.h"
+#include "verify.h"
+
+/* The speed critical point in this file is freea() applied to an alloca()
+   result: it must be fast, to match the speed of alloca().  The speed of
+   mmalloca() and freea() in the other case are not critical, because they
+   are only invoked for big memory sizes.
+   Here we use a bit in the address as an indicator, an idea by Ondřej Bílka.
+   malloca() can return three types of pointers:
+     - Pointers ≡ 0 mod 2*sa_alignment_max come from stack allocation.
+     - Pointers ≡ sa_alignment_max mod 2*sa_alignment_max come from heap
+       allocation.
+     - NULL comes from a failed heap allocation.  */
+
+/* Type for holding very small pointer differences.  */
+typedef unsigned char small_t;
+/* Verify that it is wide enough.  */
+verify (2 * sa_alignment_max - 1 <= (small_t) -1);
+
+void *
+mmalloca (size_t n)
+{
+#if HAVE_ALLOCA
+  /* Allocate one more word, used to determine the address to pass to freea(),
+     and room for the alignment ≡ sa_alignment_max mod 2*sa_alignment_max.  */
+  uintptr_t alignment2_mask = 2 * sa_alignment_max - 1;
+  int plus = sizeof (small_t) + alignment2_mask;
+  idx_t nplus;
+  if (!INT_ADD_WRAPV (n, plus, &nplus) && !xalloc_oversized (nplus, 1))
+    {
+      char *mem = (char *) malloc (nplus);
+
+      if (mem != NULL)
+        {
+          uintptr_t umem = (uintptr_t)mem, umemplus;
+          /* The INT_ADD_WRAPV avoids signed integer overflow on
+             theoretical platforms where UINTPTR_MAX <= INT_MAX.  */
+          INT_ADD_WRAPV (umem, sizeof (small_t) + sa_alignment_max - 1,
+                         &umemplus);
+          idx_t offset = ((umemplus & ~alignment2_mask)
+                          + sa_alignment_max - umem);
+          void *vp = mem + offset;
+          small_t *p = vp;
+          /* Here p >= mem + sizeof (small_t),
+             and p <= mem + sizeof (small_t) + 2 * sa_alignment_max - 1
+             hence p + n <= mem + nplus.
+             So, the memory range [p, p+n) lies in the allocated memory range
+             [mem, mem + nplus).  */
+          p[-1] = offset;
+          /* p ≡ sa_alignment_max mod 2*sa_alignment_max.  */
+          return p;
+        }
+    }
+  /* Out of memory.  */
+  return NULL;
+#else
+# if !MALLOC_0_IS_NONNULL
+  if (n == 0)
+    n = 1;
+# endif
+  return malloc (n);
+#endif
+}
+
+#if HAVE_ALLOCA
+void
+freea (void *p)
+{
+  /* Check argument.  */
+  if ((uintptr_t) p & (sa_alignment_max - 1))
+    {
+      /* p was not the result of a malloca() call.  Invalid argument.  */
+      abort ();
+    }
+  /* Determine whether p was a non-NULL pointer returned by mmalloca().  */
+  if ((uintptr_t) p & sa_alignment_max)
+    {
+      void *mem = (char *) p - ((small_t *) p)[-1];
+      free (mem);
+    }
+}
+#endif
+
+/*
+ * Hey Emacs!
+ * Local Variables:
+ * coding: utf-8
+ * End:
+ */
diff --git a/src/grep/lib/malloca.h b/src/grep/lib/malloca.h
new file mode 100644
index 0000000..7eb63d2
--- /dev/null
+++ b/src/grep/lib/malloca.h
@@ -0,0 +1,126 @@
+/* Safe automatic memory allocation.
+   Copyright (C) 2003-2007, 2009-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2003.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _MALLOCA_H
+#define _MALLOCA_H
+
+#include <alloca.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "xalloc-oversized.h"
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* safe_alloca(N) is equivalent to alloca(N) when it is safe to call
+   alloca(N); otherwise it returns NULL.  It either returns N bytes of
+   memory allocated on the stack, that lasts until the function returns,
+   or NULL.
+   Use of safe_alloca should be avoided:
+     - inside arguments of function calls - undefined behaviour,
+     - in inline functions - the allocation may actually last until the
+       calling function returns.
+*/
+#if HAVE_ALLOCA
+/* The OS usually guarantees only one guard page at the bottom of the stack,
+   and a page size can be as small as 4096 bytes.  So we cannot safely
+   allocate anything larger than 4096 bytes.  Also care for the possibility
+   of a few compiler-allocated temporary stack slots.
+   This must be a macro, not a function.  */
+# define safe_alloca(N) ((N) < 4032 ? alloca (N) : NULL)
+#else
+# define safe_alloca(N) ((void) (N), NULL)
+#endif
+
+/* Free a block of memory allocated through malloca().  */
+#if HAVE_ALLOCA
+extern void freea (void *p);
+#else
+# define freea free
+#endif
+
+/* malloca(N) is a safe variant of alloca(N).  It allocates N bytes of
+   memory allocated on the stack, that must be freed using freea() before
+   the function returns.  Upon failure, it returns NULL.  */
+#if HAVE_ALLOCA
+# define malloca(N) \
+  ((N) < 4032 - (2 * sa_alignment_max - 1)                                   \
+   ? (void *) (((uintptr_t) (char *) alloca ((N) + 2 * sa_alignment_max - 1) \
+                + (2 * sa_alignment_max - 1))                                \
+               & ~(uintptr_t)(2 * sa_alignment_max - 1))                     \
+   : mmalloca (N))
+#else
+# define malloca(N) \
+  mmalloca (N)
+#endif
+extern void *mmalloca (size_t n)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC (freea, 1)
+  _GL_ATTRIBUTE_ALLOC_SIZE ((1));
+
+/* nmalloca(N,S) is an overflow-safe variant of malloca (N * S).
+   It allocates an array of N objects, each with S bytes of memory,
+   on the stack.  N and S should be nonnegative and free of side effects.
+   The array must be freed using freea() before the function returns.  */
+#define nmalloca(n, s) \
+  (xalloc_oversized (n, s) ? NULL : malloca ((n) * (size_t) (s)))
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+/* ------------------- Auxiliary, non-public definitions ------------------- */
+
+/* Determine the alignment of a type at compile time.  */
+#if defined __GNUC__ || defined __clang__ || defined __IBM__ALIGNOF__
+# define sa_alignof __alignof__
+#elif defined __cplusplus
+  template <class type> struct sa_alignof_helper { char __slot1; type __slot2; };
+# define sa_alignof(type) offsetof (sa_alignof_helper<type>, __slot2)
+#elif defined __hpux
+  /* Work around a HP-UX 10.20 cc bug with enums constants defined as offsetof
+     values.  */
+# define sa_alignof(type) (sizeof (type) <= 4 ? 4 : 8)
+#elif defined _AIX
+  /* Work around an AIX 3.2.5 xlc bug with enums constants defined as offsetof
+     values.  */
+# define sa_alignof(type) (sizeof (type) <= 4 ? 4 : 8)
+#else
+# define sa_alignof(type) offsetof (struct { char __slot1; type __slot2; }, __slot2)
+#endif
+
+enum
+{
+/* The desired alignment of memory allocations is the maximum alignment
+   among all elementary types.  */
+  sa_alignment_long = sa_alignof (long),
+  sa_alignment_double = sa_alignof (double),
+  sa_alignment_longlong = sa_alignof (long long),
+  sa_alignment_longdouble = sa_alignof (long double),
+  sa_alignment_max = ((sa_alignment_long - 1) | (sa_alignment_double - 1)
+                      | (sa_alignment_longlong - 1)
+                      | (sa_alignment_longdouble - 1)
+                     ) + 1
+};
+
+#endif /* _MALLOCA_H */
diff --git a/src/grep/lib/mbchar.c b/src/grep/lib/mbchar.c
new file mode 100644
index 0000000..a466257
--- /dev/null
+++ b/src/grep/lib/mbchar.c
@@ -0,0 +1,37 @@
+/* Copyright (C) 2001, 2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+
+#include <config.h>
+
+#define MBCHAR_INLINE _GL_EXTERN_INLINE
+
+#include <limits.h>
+
+#include "mbchar.h"
+
+#if IS_BASIC_ASCII
+
+/* Bit table of characters in the ISO C "basic character set".  */
+const unsigned int is_basic_table [UCHAR_MAX / 32 + 1] =
+{
+  0x00001a00,           /* '\t' '\v' '\f' */
+  0xffffffef,           /* ' '...'#' '%'...'?' */
+  0xfffffffe,           /* 'A'...'Z' '[' '\\' ']' '^' '_' */
+  0x7ffffffe            /* 'a'...'z' '{' '|' '}' '~' */
+  /* The remaining bits are 0.  */
+};
+
+#endif /* IS_BASIC_ASCII */
diff --git a/src/grep/lib/mbchar.h b/src/grep/lib/mbchar.h
new file mode 100644
index 0000000..704814a
--- /dev/null
+++ b/src/grep/lib/mbchar.h
@@ -0,0 +1,353 @@
+/* Multibyte character data type.
+   Copyright (C) 2001, 2005-2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>.  */
+
+/* A multibyte character is a short subsequence of a char* string,
+   representing a single wide character.
+
+   We use multibyte characters instead of wide characters because of
+   the following goals:
+   1) correct multibyte handling, i.e. operate according to the LC_CTYPE
+      locale,
+   2) ease of maintenance, i.e. the maintainer needs not know all details
+      of the ISO C 99 standard,
+   3) don't fail grossly if the input is not in the encoding set by the
+      locale, because often different encodings are in use in the same
+      countries (ISO-8859-1/UTF-8, EUC-JP/Shift_JIS, ...),
+   4) fast in the case of ASCII characters,
+   5) portability, i.e. don't make unportable assumptions about wchar_t.
+
+   Multibyte characters are only accessed through the mb* macros.
+
+   mb_ptr (mbc)
+     return a pointer to the beginning of the multibyte sequence.
+
+   mb_len (mbc)
+     returns the number of bytes occupied by the multibyte sequence.
+     Always > 0.
+
+   mb_iseq (mbc, sc)
+     returns true if mbc is the standard ASCII character sc.
+
+   mb_isnul (mbc)
+     returns true if mbc is the nul character.
+
+   mb_cmp (mbc1, mbc2)
+     returns a positive, zero, or negative value depending on whether mbc1
+     sorts after, same or before mbc2.
+
+   mb_casecmp (mbc1, mbc2)
+     returns a positive, zero, or negative value depending on whether mbc1
+     sorts after, same or before mbc2, modulo upper/lowercase conversion.
+
+   mb_equal (mbc1, mbc2)
+     returns true if mbc1 and mbc2 are equal.
+
+   mb_caseequal (mbc1, mbc2)
+     returns true if mbc1 and mbc2 are equal modulo upper/lowercase conversion.
+
+   mb_isalnum (mbc)
+     returns true if mbc is alphanumeric.
+
+   mb_isalpha (mbc)
+     returns true if mbc is alphabetic.
+
+   mb_isascii(mbc)
+     returns true if mbc is plain ASCII.
+
+   mb_isblank (mbc)
+     returns true if mbc is a blank.
+
+   mb_iscntrl (mbc)
+     returns true if mbc is a control character.
+
+   mb_isdigit (mbc)
+     returns true if mbc is a decimal digit.
+
+   mb_isgraph (mbc)
+     returns true if mbc is a graphic character.
+
+   mb_islower (mbc)
+     returns true if mbc is lowercase.
+
+   mb_isprint (mbc)
+     returns true if mbc is a printable character.
+
+   mb_ispunct (mbc)
+     returns true if mbc is a punctuation character.
+
+   mb_isspace (mbc)
+     returns true if mbc is a space character.
+
+   mb_isupper (mbc)
+     returns true if mbc is uppercase.
+
+   mb_isxdigit (mbc)
+     returns true if mbc is a hexadecimal digit.
+
+   mb_width (mbc)
+     returns the number of columns on the output device occupied by mbc.
+     Always >= 0.
+
+   mb_putc (mbc, stream)
+     outputs mbc on stream, a byte oriented FILE stream opened for output.
+
+   mb_setascii (&mbc, sc)
+     assigns the standard ASCII character sc to mbc.
+
+   mb_copy (&destmbc, &srcmbc)
+     copies srcmbc to destmbc.
+
+   Here are the function prototypes of the macros.
+
+   extern const char *  mb_ptr (const mbchar_t mbc);
+   extern size_t        mb_len (const mbchar_t mbc);
+   extern bool          mb_iseq (const mbchar_t mbc, char sc);
+   extern bool          mb_isnul (const mbchar_t mbc);
+   extern int           mb_cmp (const mbchar_t mbc1, const mbchar_t mbc2);
+   extern int           mb_casecmp (const mbchar_t mbc1, const mbchar_t mbc2);
+   extern bool          mb_equal (const mbchar_t mbc1, const mbchar_t mbc2);
+   extern bool          mb_caseequal (const mbchar_t mbc1, const mbchar_t mbc2);
+   extern bool          mb_isalnum (const mbchar_t mbc);
+   extern bool          mb_isalpha (const mbchar_t mbc);
+   extern bool          mb_isascii (const mbchar_t mbc);
+   extern bool          mb_isblank (const mbchar_t mbc);
+   extern bool          mb_iscntrl (const mbchar_t mbc);
+   extern bool          mb_isdigit (const mbchar_t mbc);
+   extern bool          mb_isgraph (const mbchar_t mbc);
+   extern bool          mb_islower (const mbchar_t mbc);
+   extern bool          mb_isprint (const mbchar_t mbc);
+   extern bool          mb_ispunct (const mbchar_t mbc);
+   extern bool          mb_isspace (const mbchar_t mbc);
+   extern bool          mb_isupper (const mbchar_t mbc);
+   extern bool          mb_isxdigit (const mbchar_t mbc);
+   extern int           mb_width (const mbchar_t mbc);
+   extern void          mb_putc (const mbchar_t mbc, FILE *stream);
+   extern void          mb_setascii (mbchar_t *new, char sc);
+   extern void          mb_copy (mbchar_t *new, const mbchar_t *old);
+ */
+
+#ifndef _MBCHAR_H
+#define _MBCHAR_H 1
+
+#include <stdbool.h>
+#include <string.h>
+#include <wchar.h>
+#include <wctype.h>
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef MBCHAR_INLINE
+# define MBCHAR_INLINE _GL_INLINE
+#endif
+
+#define MBCHAR_BUF_SIZE 24
+
+struct mbchar
+{
+  const char *ptr;      /* pointer to current character */
+  size_t bytes;         /* number of bytes of current character, > 0 */
+  bool wc_valid;        /* true if wc is a valid wide character */
+  wchar_t wc;           /* if wc_valid: the current character */
+  char buf[MBCHAR_BUF_SIZE]; /* room for the bytes, used for file input only */
+};
+
+/* EOF (not a real character) is represented with bytes = 0 and
+   wc_valid = false.  */
+
+typedef struct mbchar mbchar_t;
+
+/* Access the current character.  */
+#define mb_ptr(mbc) ((mbc).ptr)
+#define mb_len(mbc) ((mbc).bytes)
+
+/* Comparison of characters.  */
+#define mb_iseq(mbc, sc) ((mbc).wc_valid && (mbc).wc == (sc))
+#define mb_isnul(mbc) ((mbc).wc_valid && (mbc).wc == 0)
+#define mb_cmp(mbc1, mbc2) \
+  ((mbc1).wc_valid                                                      \
+   ? ((mbc2).wc_valid                                                   \
+      ? (int) (mbc1).wc - (int) (mbc2).wc                               \
+      : -1)                                                             \
+   : ((mbc2).wc_valid                                                   \
+      ? 1                                                               \
+      : (mbc1).bytes == (mbc2).bytes                                    \
+        ? memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes)                 \
+        : (mbc1).bytes < (mbc2).bytes                                   \
+          ? (memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) > 0 ? 1 : -1) \
+          : (memcmp ((mbc1).ptr, (mbc2).ptr, (mbc2).bytes) >= 0 ? 1 : -1)))
+#define mb_casecmp(mbc1, mbc2) \
+  ((mbc1).wc_valid                                                      \
+   ? ((mbc2).wc_valid                                                   \
+      ? (int) towlower ((mbc1).wc) - (int) towlower ((mbc2).wc)         \
+      : -1)                                                             \
+   : ((mbc2).wc_valid                                                   \
+      ? 1                                                               \
+      : (mbc1).bytes == (mbc2).bytes                                    \
+        ? memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes)                 \
+        : (mbc1).bytes < (mbc2).bytes                                   \
+          ? (memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) > 0 ? 1 : -1) \
+          : (memcmp ((mbc1).ptr, (mbc2).ptr, (mbc2).bytes) >= 0 ? 1 : -1)))
+#define mb_equal(mbc1, mbc2) \
+  ((mbc1).wc_valid && (mbc2).wc_valid                                   \
+   ? (mbc1).wc == (mbc2).wc                                             \
+   : (mbc1).bytes == (mbc2).bytes                                       \
+     && memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) == 0)
+#define mb_caseequal(mbc1, mbc2) \
+  ((mbc1).wc_valid && (mbc2).wc_valid                                   \
+   ? towlower ((mbc1).wc) == towlower ((mbc2).wc)                       \
+   : (mbc1).bytes == (mbc2).bytes                                       \
+     && memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) == 0)
+
+/* <ctype.h>, <wctype.h> classification.  */
+#define mb_isascii(mbc) \
+  ((mbc).wc_valid && (mbc).wc >= 0 && (mbc).wc <= 127)
+#define mb_isalnum(mbc) ((mbc).wc_valid && iswalnum ((mbc).wc))
+#define mb_isalpha(mbc) ((mbc).wc_valid && iswalpha ((mbc).wc))
+#define mb_isblank(mbc) ((mbc).wc_valid && iswblank ((mbc).wc))
+#define mb_iscntrl(mbc) ((mbc).wc_valid && iswcntrl ((mbc).wc))
+#define mb_isdigit(mbc) ((mbc).wc_valid && iswdigit ((mbc).wc))
+#define mb_isgraph(mbc) ((mbc).wc_valid && iswgraph ((mbc).wc))
+#define mb_islower(mbc) ((mbc).wc_valid && iswlower ((mbc).wc))
+#define mb_isprint(mbc) ((mbc).wc_valid && iswprint ((mbc).wc))
+#define mb_ispunct(mbc) ((mbc).wc_valid && iswpunct ((mbc).wc))
+#define mb_isspace(mbc) ((mbc).wc_valid && iswspace ((mbc).wc))
+#define mb_isupper(mbc) ((mbc).wc_valid && iswupper ((mbc).wc))
+#define mb_isxdigit(mbc) ((mbc).wc_valid && iswxdigit ((mbc).wc))
+
+/* Extra <wchar.h> function.  */
+
+/* Unprintable characters appear as a small box of width 1.  */
+#define MB_UNPRINTABLE_WIDTH 1
+
+MBCHAR_INLINE int
+mb_width_aux (wint_t wc)
+{
+  int w = wcwidth (wc);
+  /* For unprintable characters, arbitrarily return 0 for control characters
+     and MB_UNPRINTABLE_WIDTH otherwise.  */
+  return (w >= 0 ? w : iswcntrl (wc) ? 0 : MB_UNPRINTABLE_WIDTH);
+}
+
+#define mb_width(mbc) \
+  ((mbc).wc_valid ? mb_width_aux ((mbc).wc) : MB_UNPRINTABLE_WIDTH)
+
+/* Output.  */
+#define mb_putc(mbc, stream)  fwrite ((mbc).ptr, 1, (mbc).bytes, (stream))
+
+/* Assignment.  */
+#define mb_setascii(mbc, sc) \
+  ((mbc)->ptr = (mbc)->buf, (mbc)->bytes = 1, (mbc)->wc_valid = 1, \
+   (mbc)->wc = (mbc)->buf[0] = (sc))
+
+/* Copying a character.  */
+MBCHAR_INLINE void
+mb_copy (mbchar_t *new_mbc, const mbchar_t *old_mbc)
+{
+  if (old_mbc->ptr == &old_mbc->buf[0])
+    {
+      memcpy (&new_mbc->buf[0], &old_mbc->buf[0], old_mbc->bytes);
+      new_mbc->ptr = &new_mbc->buf[0];
+    }
+  else
+    new_mbc->ptr = old_mbc->ptr;
+  new_mbc->bytes = old_mbc->bytes;
+  if ((new_mbc->wc_valid = old_mbc->wc_valid))
+    new_mbc->wc = old_mbc->wc;
+}
+
+
+/* is_basic(c) tests whether the single-byte character c is in the
+   ISO C "basic character set".
+   This is a convenience function, and is in this file only to share code
+   between mbiter_multi.h and mbfile_multi.h.  */
+#if (' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
+    && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \
+    && (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \
+    && ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \
+    && ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \
+    && ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \
+    && ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \
+    && ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \
+    && ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \
+    && ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \
+    && ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \
+    && ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \
+    && ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \
+    && ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \
+    && ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \
+    && ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \
+    && ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \
+    && ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \
+    && ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \
+    && ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \
+    && ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \
+    && ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \
+    && ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126)
+/* The character set is ISO-646, not EBCDIC. */
+# define IS_BASIC_ASCII 1
+
+extern const unsigned int is_basic_table[];
+
+MBCHAR_INLINE bool
+is_basic (char c)
+{
+  return (is_basic_table [(unsigned char) c >> 5] >> ((unsigned char) c & 31))
+         & 1;
+}
+
+#else
+
+MBCHAR_INLINE bool
+is_basic (char c)
+{
+  switch (c)
+    {
+    case '\t': case '\v': case '\f':
+    case ' ': case '!': case '"': case '#': case '%':
+    case '&': case '\'': case '(': case ')': case '*':
+    case '+': case ',': case '-': case '.': case '/':
+    case '0': case '1': case '2': case '3': case '4':
+    case '5': case '6': case '7': case '8': case '9':
+    case ':': case ';': case '<': case '=': case '>':
+    case '?':
+    case 'A': case 'B': case 'C': case 'D': case 'E':
+    case 'F': case 'G': case 'H': case 'I': case 'J':
+    case 'K': case 'L': case 'M': case 'N': case 'O':
+    case 'P': case 'Q': case 'R': case 'S': case 'T':
+    case 'U': case 'V': case 'W': case 'X': case 'Y':
+    case 'Z':
+    case '[': case '\\': case ']': case '^': case '_':
+    case 'a': case 'b': case 'c': case 'd': case 'e':
+    case 'f': case 'g': case 'h': case 'i': case 'j':
+    case 'k': case 'l': case 'm': case 'n': case 'o':
+    case 'p': case 'q': case 'r': case 's': case 't':
+    case 'u': case 'v': case 'w': case 'x': case 'y':
+    case 'z': case '{': case '|': case '}': case '~':
+      return 1;
+    default:
+      return 0;
+    }
+}
+
+#endif
+
+_GL_INLINE_HEADER_END
+
+#endif /* _MBCHAR_H */
diff --git a/src/grep/lib/mbiter.c b/src/grep/lib/mbiter.c
new file mode 100644
index 0000000..8c49fd7
--- /dev/null
+++ b/src/grep/lib/mbiter.c
@@ -0,0 +1,21 @@
+/* Iterating through multibyte strings: macros for multi-byte encodings.
+
+   Copyright (C) 2012-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#define MBITER_INLINE _GL_EXTERN_INLINE
+#include "mbiter.h"
diff --git a/src/grep/lib/mbiter.h b/src/grep/lib/mbiter.h
new file mode 100644
index 0000000..8337b33
--- /dev/null
+++ b/src/grep/lib/mbiter.h
@@ -0,0 +1,218 @@
+/* Iterating through multibyte strings: macros for multi-byte encodings.
+   Copyright (C) 2001, 2005, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>.  */
+
+/* The macros in this file implement forward iteration through a
+   multi-byte string.
+
+   With these macros, an iteration loop that looks like
+
+      char *iter;
+      for (iter = buf; iter < buf + buflen; iter++)
+        {
+          do_something (*iter);
+        }
+
+   becomes
+
+      mbi_iterator_t iter;
+      for (mbi_init (iter, buf, buflen); mbi_avail (iter); mbi_advance (iter))
+        {
+          do_something (mbi_cur_ptr (iter), mb_len (mbi_cur (iter)));
+        }
+
+   The benefit of these macros over plain use of mbrtowc is:
+   - Handling of invalid multibyte sequences is possible without
+     making the code more complicated, while still preserving the
+     invalid multibyte sequences.
+
+   mbi_iterator_t
+     is a type usable for variable declarations.
+
+   mbi_init (iter, startptr, length)
+     initializes the iterator, starting at startptr and crossing length bytes.
+
+   mbi_avail (iter)
+     returns true if there are more multibyte characters available before
+     the end of string is reached. In this case, mbi_cur (iter) is
+     initialized to the next multibyte character.
+
+   mbi_advance (iter)
+     advances the iterator by one multibyte character.
+
+   mbi_cur (iter)
+     returns the current multibyte character, of type mbchar_t.  All the
+     macros defined in mbchar.h can be used on it.
+
+   mbi_cur_ptr (iter)
+     return a pointer to the beginning of the current multibyte character.
+
+   mbi_reloc (iter, ptrdiff)
+     relocates iterator when the string is moved by ptrdiff bytes.
+
+   mbi_copy (&destiter, &srciter)
+     copies srciter to destiter.
+
+   Here are the function prototypes of the macros.
+
+   extern void          mbi_init (mbi_iterator_t iter,
+                                  const char *startptr, size_t length);
+   extern bool          mbi_avail (mbi_iterator_t iter);
+   extern void          mbi_advance (mbi_iterator_t iter);
+   extern mbchar_t      mbi_cur (mbi_iterator_t iter);
+   extern const char *  mbi_cur_ptr (mbi_iterator_t iter);
+   extern void          mbi_reloc (mbi_iterator_t iter, ptrdiff_t ptrdiff);
+   extern void          mbi_copy (mbi_iterator_t *new, const mbi_iterator_t *old);
+ */
+
+#ifndef _MBITER_H
+#define _MBITER_H 1
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <string.h>
+#include <wchar.h>
+
+#include "mbchar.h"
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef MBITER_INLINE
+# define MBITER_INLINE _GL_INLINE
+#endif
+
+struct mbiter_multi
+{
+  const char *limit;    /* pointer to end of string */
+  bool in_shift;        /* true if next byte may not be interpreted as ASCII */
+  mbstate_t state;      /* if in_shift: current shift state */
+  bool next_done;       /* true if mbi_avail has already filled the following */
+  struct mbchar cur;    /* the current character:
+        const char *cur.ptr             pointer to current character
+        The following are only valid after mbi_avail.
+        size_t cur.bytes                number of bytes of current character
+        bool cur.wc_valid               true if wc is a valid wide character
+        wchar_t cur.wc                  if wc_valid: the current character
+        */
+};
+
+MBITER_INLINE void
+mbiter_multi_next (struct mbiter_multi *iter)
+{
+  if (iter->next_done)
+    return;
+  if (iter->in_shift)
+    goto with_shift;
+  /* Handle most ASCII characters quickly, without calling mbrtowc().  */
+  if (is_basic (*iter->cur.ptr))
+    {
+      /* These characters are part of the basic character set.  ISO C 99
+         guarantees that their wide character code is identical to their
+         char code.  */
+      iter->cur.bytes = 1;
+      iter->cur.wc = *iter->cur.ptr;
+      iter->cur.wc_valid = true;
+    }
+  else
+    {
+      assert (mbsinit (&iter->state));
+      iter->in_shift = true;
+    with_shift:
+      iter->cur.bytes = mbrtowc (&iter->cur.wc, iter->cur.ptr,
+                                 iter->limit - iter->cur.ptr, &iter->state);
+      if (iter->cur.bytes == (size_t) -1)
+        {
+          /* An invalid multibyte sequence was encountered.  */
+          iter->cur.bytes = 1;
+          iter->cur.wc_valid = false;
+          /* Whether to set iter->in_shift = false and reset iter->state
+             or not is not very important; the string is bogus anyway.  */
+        }
+      else if (iter->cur.bytes == (size_t) -2)
+        {
+          /* An incomplete multibyte character at the end.  */
+          iter->cur.bytes = iter->limit - iter->cur.ptr;
+          iter->cur.wc_valid = false;
+          /* Whether to set iter->in_shift = false and reset iter->state
+             or not is not important; the string end is reached anyway.  */
+        }
+      else
+        {
+          if (iter->cur.bytes == 0)
+            {
+              /* A null wide character was encountered.  */
+              iter->cur.bytes = 1;
+              assert (*iter->cur.ptr == '\0');
+              assert (iter->cur.wc == 0);
+            }
+          iter->cur.wc_valid = true;
+
+          /* When in the initial state, we can go back treating ASCII
+             characters more quickly.  */
+          if (mbsinit (&iter->state))
+            iter->in_shift = false;
+        }
+    }
+  iter->next_done = true;
+}
+
+MBITER_INLINE void
+mbiter_multi_reloc (struct mbiter_multi *iter, ptrdiff_t ptrdiff)
+{
+  iter->cur.ptr += ptrdiff;
+  iter->limit += ptrdiff;
+}
+
+MBITER_INLINE void
+mbiter_multi_copy (struct mbiter_multi *new_iter, const struct mbiter_multi *old_iter)
+{
+  new_iter->limit = old_iter->limit;
+  if ((new_iter->in_shift = old_iter->in_shift))
+    memcpy (&new_iter->state, &old_iter->state, sizeof (mbstate_t));
+  else
+    memset (&new_iter->state, 0, sizeof (mbstate_t));
+  new_iter->next_done = old_iter->next_done;
+  mb_copy (&new_iter->cur, &old_iter->cur);
+}
+
+/* Iteration macros.  */
+typedef struct mbiter_multi mbi_iterator_t;
+#define mbi_init(iter, startptr, length) \
+  ((iter).cur.ptr = (startptr), (iter).limit = (iter).cur.ptr + (length), \
+   (iter).in_shift = false, memset (&(iter).state, '\0', sizeof (mbstate_t)), \
+   (iter).next_done = false)
+#define mbi_avail(iter) \
+  ((iter).cur.ptr < (iter).limit && (mbiter_multi_next (&(iter)), true))
+#define mbi_advance(iter) \
+  ((iter).cur.ptr += (iter).cur.bytes, (iter).next_done = false)
+
+/* Access to the current character.  */
+#define mbi_cur(iter) (iter).cur
+#define mbi_cur_ptr(iter) (iter).cur.ptr
+
+/* Relocation.  */
+#define mbi_reloc(iter, ptrdiff) mbiter_multi_reloc (&iter, ptrdiff)
+
+/* Copying an iterator.  */
+#define mbi_copy mbiter_multi_copy
+
+_GL_INLINE_HEADER_END
+
+#endif /* _MBITER_H */
diff --git a/src/grep/lib/mbrlen.c b/src/grep/lib/mbrlen.c
new file mode 100644
index 0000000..aca8c83
--- /dev/null
+++ b/src/grep/lib/mbrlen.c
@@ -0,0 +1,32 @@
+/* Recognize multibyte character.
+   Copyright (C) 1999-2000, 2008-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2008.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <wchar.h>
+
+
+static mbstate_t internal_state;
+
+size_t
+mbrlen (const char *s, size_t n, mbstate_t *ps)
+{
+  if (ps == NULL)
+    ps = &internal_state;
+  return mbrtowc (NULL, s, n, ps);
+}
diff --git a/src/grep/lib/mbrtowc-impl-utf8.h b/src/grep/lib/mbrtowc-impl-utf8.h
new file mode 100644
index 0000000..330fb10
--- /dev/null
+++ b/src/grep/lib/mbrtowc-impl-utf8.h
@@ -0,0 +1,138 @@
+/* Convert multibyte character to wide character.
+   Copyright (C) 1999-2002, 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+/* This file contains the part of the body of the mbrtowc and mbrtoc32 functions
+   that handles the special case of the UTF-8 encoding.  */
+
+        /* Cf. unistr/u8-mbtouc.c.  */
+        unsigned char c = (unsigned char) p[0];
+
+        if (c < 0x80)
+          {
+            if (pwc != NULL)
+              *pwc = c;
+            res = (c == 0 ? 0 : 1);
+            goto success;
+          }
+        if (c >= 0xc2)
+          {
+            if (c < 0xe0)
+              {
+                if (m == 1)
+                  goto incomplete;
+                else /* m >= 2 */
+                  {
+                    unsigned char c2 = (unsigned char) p[1];
+
+                    if ((c2 ^ 0x80) < 0x40)
+                      {
+                        if (pwc != NULL)
+                          *pwc = ((unsigned int) (c & 0x1f) << 6)
+                                 | (unsigned int) (c2 ^ 0x80);
+                        res = 2;
+                        goto success;
+                      }
+                  }
+              }
+            else if (c < 0xf0)
+              {
+                if (m == 1)
+                  goto incomplete;
+                else
+                  {
+                    unsigned char c2 = (unsigned char) p[1];
+
+                    if ((c2 ^ 0x80) < 0x40
+                        && (c >= 0xe1 || c2 >= 0xa0)
+                        && (c != 0xed || c2 < 0xa0))
+                      {
+                        if (m == 2)
+                          goto incomplete;
+                        else /* m >= 3 */
+                          {
+                            unsigned char c3 = (unsigned char) p[2];
+
+                            if ((c3 ^ 0x80) < 0x40)
+                              {
+                                unsigned int wc =
+                                  (((unsigned int) (c & 0x0f) << 12)
+                                   | ((unsigned int) (c2 ^ 0x80) << 6)
+                                   | (unsigned int) (c3 ^ 0x80));
+
+                                if (FITS_IN_CHAR_TYPE (wc))
+                                  {
+                                    if (pwc != NULL)
+                                      *pwc = wc;
+                                    res = 3;
+                                    goto success;
+                                  }
+                              }
+                          }
+                      }
+                  }
+              }
+            else if (c <= 0xf4)
+              {
+                if (m == 1)
+                  goto incomplete;
+                else
+                  {
+                    unsigned char c2 = (unsigned char) p[1];
+
+                    if ((c2 ^ 0x80) < 0x40
+                        && (c >= 0xf1 || c2 >= 0x90)
+                        && (c < 0xf4 || (/* c == 0xf4 && */ c2 < 0x90)))
+                      {
+                        if (m == 2)
+                          goto incomplete;
+                        else
+                          {
+                            unsigned char c3 = (unsigned char) p[2];
+
+                            if ((c3 ^ 0x80) < 0x40)
+                              {
+                                if (m == 3)
+                                  goto incomplete;
+                                else /* m >= 4 */
+                                  {
+                                    unsigned char c4 = (unsigned char) p[3];
+
+                                    if ((c4 ^ 0x80) < 0x40)
+                                      {
+                                        unsigned int wc =
+                                          (((unsigned int) (c & 0x07) << 18)
+                                           | ((unsigned int) (c2 ^ 0x80) << 12)
+                                           | ((unsigned int) (c3 ^ 0x80) << 6)
+                                           | (unsigned int) (c4 ^ 0x80));
+
+                                        if (FITS_IN_CHAR_TYPE (wc))
+                                          {
+                                            if (pwc != NULL)
+                                              *pwc = wc;
+                                            res = 4;
+                                            goto success;
+                                          }
+                                      }
+                                  }
+                              }
+                          }
+                      }
+                  }
+              }
+          }
+        goto invalid;
diff --git a/src/grep/lib/mbrtowc-impl.h b/src/grep/lib/mbrtowc-impl.h
new file mode 100644
index 0000000..bc3e688
--- /dev/null
+++ b/src/grep/lib/mbrtowc-impl.h
@@ -0,0 +1,262 @@
+/* Convert multibyte character to wide character.
+   Copyright (C) 1999-2002, 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+/* This file contains the body of the mbrtowc and mbrtoc32 functions,
+   when GNULIB_defined_mbstate_t is defined.  */
+
+  char *pstate = (char *)ps;
+
+  if (s == NULL)
+    {
+      pwc = NULL;
+      s = "";
+      n = 1;
+    }
+
+  if (n == 0)
+    return (size_t)(-2);
+
+  /* Here n > 0.  */
+
+  if (pstate == NULL)
+    pstate = internal_state;
+
+  {
+    size_t nstate = pstate[0];
+    char buf[4];
+    const char *p;
+    size_t m;
+    enc_t enc;
+    int res;
+
+    switch (nstate)
+      {
+      case 0:
+        p = s;
+        m = n;
+        break;
+      case 3:
+        buf[2] = pstate[3];
+        FALLTHROUGH;
+      case 2:
+        buf[1] = pstate[2];
+        FALLTHROUGH;
+      case 1:
+        buf[0] = pstate[1];
+        p = buf;
+        m = nstate;
+        buf[m++] = s[0];
+        if (n >= 2 && m < 4)
+          {
+            buf[m++] = s[1];
+            if (n >= 3 && m < 4)
+              buf[m++] = s[2];
+          }
+        break;
+      default:
+        errno = EINVAL;
+        return (size_t)(-1);
+      }
+
+    /* Here m > 0.  */
+
+    enc = locale_encoding_classification ();
+
+    if (enc == enc_utf8) /* UTF-8 */
+      {
+        /* Achieve
+             - multi-thread safety and
+             - the ability to produce wide character values > WCHAR_MAX
+           by not calling mbtowc() at all.  */
+#include "mbrtowc-impl-utf8.h"
+      }
+    else
+      {
+        /* The hidden internal state of mbtowc would make this function not
+           multi-thread safe.  Achieve multi-thread safety through a lock.  */
+        wchar_t wc;
+        res = mbtowc_with_lock (&wc, p, m);
+
+        if (res >= 0)
+          {
+            if ((wc == 0) != (res == 0))
+              abort ();
+            if (pwc != NULL)
+              *pwc = wc;
+            goto success;
+          }
+
+        /* mbtowc does not distinguish between invalid and incomplete multibyte
+           sequences.  But mbrtowc needs to make this distinction.
+           There are two possible approaches:
+             - Use iconv() and its return value.
+             - Use built-in knowledge about the possible encodings.
+           Given the low quality of implementation of iconv() on the systems
+           that lack mbrtowc(), we use the second approach.
+           The possible encodings are:
+             - 8-bit encodings,
+             - EUC-JP, EUC-KR, GB2312, EUC-TW, BIG5, GB18030, SJIS,
+             - UTF-8 (already handled above).
+           Use specialized code for each.  */
+        if (m >= 4 || m >= MB_CUR_MAX)
+          goto invalid;
+        /* Here MB_CUR_MAX > 1 and 0 < m < 4.  */
+        switch (enc)
+          {
+          /* As a reference for this code, you can use the GNU libiconv
+             implementation.  Look for uses of the RET_TOOFEW macro.  */
+
+          case enc_eucjp: /* EUC-JP */
+            {
+              if (m == 1)
+                {
+                  unsigned char c = (unsigned char) p[0];
+
+                  if ((c >= 0xa1 && c < 0xff) || c == 0x8e || c == 0x8f)
+                    goto incomplete;
+                }
+              if (m == 2)
+                {
+                  unsigned char c = (unsigned char) p[0];
+
+                  if (c == 0x8f)
+                    {
+                      unsigned char c2 = (unsigned char) p[1];
+
+                      if (c2 >= 0xa1 && c2 < 0xff)
+                        goto incomplete;
+                    }
+                }
+              goto invalid;
+            }
+
+          case enc_94: /* EUC-KR, GB2312, BIG5 */
+            {
+              if (m == 1)
+                {
+                  unsigned char c = (unsigned char) p[0];
+
+                  if (c >= 0xa1 && c < 0xff)
+                    goto incomplete;
+                }
+              goto invalid;
+            }
+
+          case enc_euctw: /* EUC-TW */
+            {
+              if (m == 1)
+                {
+                  unsigned char c = (unsigned char) p[0];
+
+                  if ((c >= 0xa1 && c < 0xff) || c == 0x8e)
+                    goto incomplete;
+                }
+              else /* m == 2 || m == 3 */
+                {
+                  unsigned char c = (unsigned char) p[0];
+
+                  if (c == 0x8e)
+                    goto incomplete;
+                }
+              goto invalid;
+            }
+
+          case enc_gb18030: /* GB18030 */
+            {
+              if (m == 1)
+                {
+                  unsigned char c = (unsigned char) p[0];
+
+                  if ((c >= 0x90 && c <= 0xe3) || (c >= 0xf8 && c <= 0xfe))
+                    goto incomplete;
+                }
+              else /* m == 2 || m == 3 */
+                {
+                  unsigned char c = (unsigned char) p[0];
+
+                  if (c >= 0x90 && c <= 0xe3)
+                    {
+                      unsigned char c2 = (unsigned char) p[1];
+
+                      if (c2 >= 0x30 && c2 <= 0x39)
+                        {
+                          if (m == 2)
+                            goto incomplete;
+                          else /* m == 3 */
+                            {
+                              unsigned char c3 = (unsigned char) p[2];
+
+                              if (c3 >= 0x81 && c3 <= 0xfe)
+                                goto incomplete;
+                            }
+                        }
+                    }
+                }
+              goto invalid;
+            }
+
+          case enc_sjis: /* SJIS */
+            {
+              if (m == 1)
+                {
+                  unsigned char c = (unsigned char) p[0];
+
+                  if ((c >= 0x81 && c <= 0x9f) || (c >= 0xe0 && c <= 0xea)
+                      || (c >= 0xf0 && c <= 0xf9))
+                    goto incomplete;
+                }
+              goto invalid;
+            }
+
+          default:
+            /* An unknown multibyte encoding.  */
+            goto incomplete;
+          }
+      }
+
+   success:
+    /* res >= 0 is the corrected return value of
+       mbtowc_with_lock (&wc, p, m).  */
+    if (nstate >= (res > 0 ? res : 1))
+      abort ();
+    res -= nstate;
+    pstate[0] = 0;
+    return res;
+
+   incomplete:
+    {
+      size_t k = nstate;
+      /* Here 0 <= k < m < 4.  */
+      pstate[++k] = s[0];
+      if (k < m)
+        {
+          pstate[++k] = s[1];
+          if (k < m)
+            pstate[++k] = s[2];
+        }
+      if (k != m)
+        abort ();
+    }
+    pstate[0] = m;
+    return (size_t)(-2);
+
+   invalid:
+    errno = EILSEQ;
+    /* The conversion state is undefined, says POSIX.  */
+    return (size_t)(-1);
+  }
diff --git a/src/grep/lib/mbrtowc.c b/src/grep/lib/mbrtowc.c
new file mode 100644
index 0000000..8832f6e
--- /dev/null
+++ b/src/grep/lib/mbrtowc.c
@@ -0,0 +1,158 @@
+/* Convert multibyte character to wide character.
+   Copyright (C) 1999-2002, 2005-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2008.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <wchar.h>
+
+#if GNULIB_defined_mbstate_t
+/* Implement mbrtowc() on top of mbtowc() for the non-UTF-8 locales
+   and directly for the UTF-8 locales.  */
+
+# include <errno.h>
+# include <stdint.h>
+# include <stdlib.h>
+
+# if defined _WIN32 && !defined __CYGWIN__
+
+#  define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#  include <windows.h>
+
+# elif HAVE_PTHREAD_API
+
+#  include <pthread.h>
+#  if HAVE_THREADS_H && HAVE_WEAK_SYMBOLS
+#   include <threads.h>
+#   pragma weak thrd_exit
+#   define c11_threads_in_use() (thrd_exit != NULL)
+#  else
+#   define c11_threads_in_use() 0
+#  endif
+
+# elif HAVE_THREADS_H
+
+#  include <threads.h>
+
+# endif
+
+# include "attribute.h"
+# include "verify.h"
+# include "lc-charset-dispatch.h"
+# include "mbtowc-lock.h"
+
+verify (sizeof (mbstate_t) >= 4);
+static char internal_state[4];
+
+size_t
+mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
+{
+# define FITS_IN_CHAR_TYPE(wc)  ((wc) <= WCHAR_MAX)
+# include "mbrtowc-impl.h"
+}
+
+#else
+/* Override the system's mbrtowc() function.  */
+
+# if MBRTOWC_IN_C_LOCALE_MAYBE_EILSEQ
+#  include "hard-locale.h"
+#  include <locale.h>
+# endif
+
+# undef mbrtowc
+
+size_t
+rpl_mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
+{
+  size_t ret;
+  wchar_t wc;
+
+# if MBRTOWC_NULL_ARG2_BUG || MBRTOWC_RETVAL_BUG || MBRTOWC_EMPTY_INPUT_BUG
+  if (s == NULL)
+    {
+      pwc = NULL;
+      s = "";
+      n = 1;
+    }
+# endif
+
+# if MBRTOWC_EMPTY_INPUT_BUG
+  if (n == 0)
+    return (size_t) -2;
+# endif
+
+  if (! pwc)
+    pwc = &wc;
+
+# if MBRTOWC_RETVAL_BUG
+  {
+    static mbstate_t internal_state;
+
+    /* Override mbrtowc's internal state.  We cannot call mbsinit() on the
+       hidden internal state, but we can call it on our variable.  */
+    if (ps == NULL)
+      ps = &internal_state;
+
+    if (!mbsinit (ps))
+      {
+        /* Parse the rest of the multibyte character byte for byte.  */
+        size_t count = 0;
+        for (; n > 0; s++, n--)
+          {
+            ret = mbrtowc (&wc, s, 1, ps);
+
+            if (ret == (size_t)(-1))
+              return (size_t)(-1);
+            count++;
+            if (ret != (size_t)(-2))
+              {
+                /* The multibyte character has been completed.  */
+                *pwc = wc;
+                return (wc == 0 ? 0 : count);
+              }
+          }
+        return (size_t)(-2);
+      }
+  }
+# endif
+
+# if MBRTOWC_STORES_INCOMPLETE_BUG
+  ret = mbrtowc (&wc, s, n, ps);
+  if (ret < (size_t) -2 && pwc != NULL)
+    *pwc = wc;
+# else
+  ret = mbrtowc (pwc, s, n, ps);
+# endif
+
+# if MBRTOWC_NUL_RETVAL_BUG
+  if (ret < (size_t) -2 && !*pwc)
+    return 0;
+# endif
+
+# if MBRTOWC_IN_C_LOCALE_MAYBE_EILSEQ
+  if ((size_t) -2 <= ret && n != 0 && ! hard_locale (LC_CTYPE))
+    {
+      unsigned char uc = *s;
+      *pwc = uc;
+      return 1;
+    }
+# endif
+
+  return ret;
+}
+
+#endif
diff --git a/src/grep/lib/mbscasecmp.c b/src/grep/lib/mbscasecmp.c
new file mode 100644
index 0000000..cad1de5
--- /dev/null
+++ b/src/grep/lib/mbscasecmp.c
@@ -0,0 +1,98 @@
+/* Case-insensitive string comparison function.
+   Copyright (C) 1998-1999, 2005-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2005,
+   based on earlier glibc code.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <string.h>
+
+#include <ctype.h>
+#include <limits.h>
+
+#include "mbuiter.h"
+
+#define TOLOWER(Ch) (isupper (Ch) ? tolower (Ch) : (Ch))
+
+/* Compare the character strings S1 and S2, ignoring case, returning less than,
+   equal to or greater than zero if S1 is lexicographically less than, equal to
+   or greater than S2.
+   Note: This function may, in multibyte locales, return 0 for strings of
+   different lengths!  */
+int
+mbscasecmp (const char *s1, const char *s2)
+{
+  if (s1 == s2)
+    return 0;
+
+  /* Be careful not to look at the entire extent of s1 or s2 until needed.
+     This is useful because when two strings differ, the difference is
+     most often already in the very few first characters.  */
+  if (MB_CUR_MAX > 1)
+    {
+      mbui_iterator_t iter1;
+      mbui_iterator_t iter2;
+
+      mbui_init (iter1, s1);
+      mbui_init (iter2, s2);
+
+      while (mbui_avail (iter1) && mbui_avail (iter2))
+        {
+          int cmp = mb_casecmp (mbui_cur (iter1), mbui_cur (iter2));
+
+          if (cmp != 0)
+            return cmp;
+
+          mbui_advance (iter1);
+          mbui_advance (iter2);
+        }
+      if (mbui_avail (iter1))
+        /* s2 terminated before s1.  */
+        return 1;
+      if (mbui_avail (iter2))
+        /* s1 terminated before s2.  */
+        return -1;
+      return 0;
+    }
+  else
+    {
+      const unsigned char *p1 = (const unsigned char *) s1;
+      const unsigned char *p2 = (const unsigned char *) s2;
+      unsigned char c1, c2;
+
+      do
+        {
+          c1 = TOLOWER (*p1);
+          c2 = TOLOWER (*p2);
+
+          if (c1 == '\0')
+            break;
+
+          ++p1;
+          ++p2;
+        }
+      while (c1 == c2);
+
+      if (UCHAR_MAX <= INT_MAX)
+        return c1 - c2;
+      else
+        /* On machines where 'char' and 'int' are types of the same size, the
+           difference of two 'unsigned char' values - including the sign bit -
+           doesn't fit in an 'int'.  */
+        return _GL_CMP (c1, c2);
+    }
+}
diff --git a/src/grep/lib/mbsinit.c b/src/grep/lib/mbsinit.c
new file mode 100644
index 0000000..f440155
--- /dev/null
+++ b/src/grep/lib/mbsinit.c
@@ -0,0 +1,70 @@
+/* Test for initial conversion state.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2008.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <wchar.h>
+
+#include "verify.h"
+
+#if GNULIB_defined_mbstate_t
+
+/* Platforms that lack mbsinit() also lack mbrlen(), mbrtowc(), mbsrtowcs()
+   and wcrtomb(), wcsrtombs().
+   We assume that
+     - sizeof (mbstate_t) >= 4,
+     - only stateless encodings are supported (such as UTF-8 and EUC-JP, but
+       not ISO-2022 variants),
+     - for each encoding, the number of bytes for a wide character is <= 4.
+       (This maximum is attained for UTF-8, GB18030, EUC-TW.)
+   We define the meaning of mbstate_t as follows:
+     - In mb -> wc direction, mbstate_t's first byte contains the number of
+       buffered bytes (in the range 0..3), followed by up to 3 buffered bytes.
+       See mbrtowc.c.
+     - In wc -> mb direction, mbstate_t contains no information. In other
+       words, it is always in the initial state.  */
+
+verify (sizeof (mbstate_t) >= 4);
+
+int
+mbsinit (const mbstate_t *ps)
+{
+  const char *pstate = (const char *)ps;
+
+  return pstate == NULL || pstate[0] == 0;
+}
+
+#else
+
+int
+mbsinit (const mbstate_t *ps)
+{
+# if defined _WIN32 && !defined __CYGWIN__
+  /* Native Windows.  */
+  /* MSVC defines 'mbstate_t' as an 8-byte struct; the first 4 bytes matter.
+     On mingw, 'mbstate_t' is sometimes defined as 'int', sometimes defined as
+     an 8-byte struct, of which the first 4 bytes matter.  */
+  return ps == NULL || *(const unsigned int *)ps == 0;
+# else
+  /* Minix, HP-UX 11.00, Solaris 2.6, Interix, ...  */
+  /* Maybe this definition works, maybe not...  */
+  return ps == NULL || *(const char *)ps == 0;
+# endif
+}
+
+#endif
diff --git a/src/grep/lib/mbslen.c b/src/grep/lib/mbslen.c
new file mode 100644
index 0000000..8517f51
--- /dev/null
+++ b/src/grep/lib/mbslen.c
@@ -0,0 +1,44 @@
+/* Counting the multibyte characters in a string.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2007.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <string.h>
+
+#include <stdlib.h>
+
+#include "mbuiter.h"
+
+/* Return the number of multibyte characters in the character string STRING.  */
+size_t
+mbslen (const char *string)
+{
+  if (MB_CUR_MAX > 1)
+    {
+      size_t count;
+      mbui_iterator_t iter;
+
+      count = 0;
+      for (mbui_init (iter, string); mbui_avail (iter); mbui_advance (iter))
+        count++;
+
+      return count;
+    }
+  else
+    return strlen (string);
+}
diff --git a/src/grep/lib/mbsrtowcs-impl.h b/src/grep/lib/mbsrtowcs-impl.h
new file mode 100644
index 0000000..ab3bab5
--- /dev/null
+++ b/src/grep/lib/mbsrtowcs-impl.h
@@ -0,0 +1,122 @@
+/* Convert string to wide string.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2008.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+size_t
+FUNC (DCHAR_T *dest, const char **srcp, size_t len, mbstate_t *ps)
+{
+  if (ps == NULL)
+    ps = &INTERNAL_STATE;
+  {
+    const char *src = *srcp;
+
+    if (dest != NULL)
+      {
+        DCHAR_T *destptr = dest;
+
+        for (; len > 0; destptr++, len--)
+          {
+            size_t src_avail;
+            size_t ret;
+
+            /* An optimized variant of
+               src_avail = strnlen1 (src, MB_LEN_MAX);  */
+            if (src[0] == '\0')
+              src_avail = 1;
+            else if (src[1] == '\0')
+              src_avail = 2;
+            else if (src[2] == '\0')
+              src_avail = 3;
+            else if (MB_LEN_MAX <= 4 || src[3] == '\0')
+              src_avail = 4;
+            else
+              src_avail = 4 + strnlen1 (src + 4, MB_LEN_MAX - 4);
+
+            /* Parse the next multibyte character.  */
+            ret = MBRTOWC (destptr, src, src_avail, ps);
+
+            if (ret == (size_t)(-2))
+              /* Encountered a multibyte character that extends past a '\0' byte
+                 or that is longer than MB_LEN_MAX bytes.  Cannot happen.  */
+              abort ();
+
+            if (ret == (size_t)(-1))
+              goto bad_input;
+            if (ret == 0)
+              {
+                src = NULL;
+                /* Here mbsinit (ps).  */
+                break;
+              }
+            src += ret;
+          }
+
+        *srcp = src;
+        return destptr - dest;
+      }
+    else
+      {
+        /* Ignore dest and len, don't store *srcp at the end, and
+           don't clobber *ps.  */
+        mbstate_t state = *ps;
+        size_t totalcount = 0;
+
+        for (;; totalcount++)
+          {
+            size_t src_avail;
+            size_t ret;
+
+            /* An optimized variant of
+               src_avail = strnlen1 (src, MB_LEN_MAX);  */
+            if (src[0] == '\0')
+              src_avail = 1;
+            else if (src[1] == '\0')
+              src_avail = 2;
+            else if (src[2] == '\0')
+              src_avail = 3;
+            else if (MB_LEN_MAX <= 4 || src[3] == '\0')
+              src_avail = 4;
+            else
+              src_avail = 4 + strnlen1 (src + 4, MB_LEN_MAX - 4);
+
+            /* Parse the next multibyte character.  */
+            ret = MBRTOWC (NULL, src, src_avail, &state);
+
+            if (ret == (size_t)(-2))
+              /* Encountered a multibyte character that extends past a '\0' byte
+                 or that is longer than MB_LEN_MAX bytes.  Cannot happen.  */
+              abort ();
+
+            if (ret == (size_t)(-1))
+              goto bad_input2;
+            if (ret == 0)
+              {
+                /* Here mbsinit (&state).  */
+                break;
+              }
+            src += ret;
+          }
+
+        return totalcount;
+      }
+
+   bad_input:
+    *srcp = src;
+   bad_input2:
+    errno = EILSEQ;
+    return (size_t)(-1);
+  }
+}
diff --git a/src/grep/lib/mbsrtowcs-state.c b/src/grep/lib/mbsrtowcs-state.c
new file mode 100644
index 0000000..83445fe
--- /dev/null
+++ b/src/grep/lib/mbsrtowcs-state.c
@@ -0,0 +1,37 @@
+/* Convert string to wide string.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2008.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <wchar.h>
+
+/* Internal state used by the functions mbsrtowcs() and mbsnrtowcs().  */
+mbstate_t _gl_mbsrtowcs_state
+/* The state must initially be in the "initial state"; so, zero-initialize it.
+   On most systems, putting it into BSS is sufficient.  Not so on Mac OS X 10.3,
+   see <https://lists.gnu.org/r/bug-gnulib/2009-01/msg00329.html>.
+   When it needs an initializer, use 0 or {0} as initializer? 0 only works
+   when mbstate_t is a scalar type (such as when gnulib defines it, or on
+   AIX, IRIX, mingw). {0} works as an initializer in all cases: for a struct
+   or union type, but also for a scalar type (ISO C 99, 6.7.8.(11)).  */
+#if defined __ELF__
+  /* On ELF systems, variables in BSS behave well.  */
+#else
+  /* Use braces, to be on the safe side.  */
+  = { 0 }
+#endif
+  ;
diff --git a/src/grep/lib/mbsrtowcs.c b/src/grep/lib/mbsrtowcs.c
new file mode 100644
index 0000000..64fb9ff
--- /dev/null
+++ b/src/grep/lib/mbsrtowcs.c
@@ -0,0 +1,36 @@
+/* Convert string to wide string.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2008.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <wchar.h>
+
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+
+#include "strnlen1.h"
+
+
+extern mbstate_t _gl_mbsrtowcs_state;
+
+#define FUNC mbsrtowcs
+#define DCHAR_T wchar_t
+#define INTERNAL_STATE _gl_mbsrtowcs_state
+#define MBRTOWC mbrtowc
+#include "mbsrtowcs-impl.h"
diff --git a/src/grep/lib/mbsstr.c b/src/grep/lib/mbsstr.c
new file mode 100644
index 0000000..aafe931
--- /dev/null
+++ b/src/grep/lib/mbsstr.c
@@ -0,0 +1,385 @@
+/* Searching in a string.  -*- coding: utf-8 -*-
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2005.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <string.h>
+
+#include <stdbool.h>
+#include <stddef.h>  /* for NULL, in case a nonstandard string.h lacks it */
+#include <stdlib.h>
+
+#include "malloca.h"
+#include "mbuiter.h"
+
+/* Knuth-Morris-Pratt algorithm.  */
+#define UNIT unsigned char
+#define CANON_ELEMENT(c) c
+#include "str-kmp.h"
+
+/* Knuth-Morris-Pratt algorithm.
+   See https://en.wikipedia.org/wiki/Knuth-Morris-Pratt_algorithm
+   Return a boolean indicating success:
+   Return true and set *RESULTP if the search was completed.
+   Return false if it was aborted because not enough memory was available.  */
+static bool
+knuth_morris_pratt_multibyte (const char *haystack, const char *needle,
+                              const char **resultp)
+{
+  size_t m = mbslen (needle);
+  mbchar_t *needle_mbchars;
+  size_t *table;
+
+  /* Allocate room for needle_mbchars and the table.  */
+  void *memory = nmalloca (m, sizeof (mbchar_t) + sizeof (size_t));
+  void *table_memory;
+  if (memory == NULL)
+    return false;
+  needle_mbchars = memory;
+  table_memory = needle_mbchars + m;
+  table = table_memory;
+
+  /* Fill needle_mbchars.  */
+  {
+    mbui_iterator_t iter;
+    size_t j;
+
+    j = 0;
+    for (mbui_init (iter, needle); mbui_avail (iter); mbui_advance (iter), j++)
+      mb_copy (&needle_mbchars[j], &mbui_cur (iter));
+  }
+
+  /* Fill the table.
+     For 0 < i < m:
+       0 < table[i] <= i is defined such that
+       forall 0 < x < table[i]: needle[x..i-1] != needle[0..i-1-x],
+       and table[i] is as large as possible with this property.
+     This implies:
+     1) For 0 < i < m:
+          If table[i] < i,
+          needle[table[i]..i-1] = needle[0..i-1-table[i]].
+     2) For 0 < i < m:
+          rhaystack[0..i-1] == needle[0..i-1]
+          and exists h, i <= h < m: rhaystack[h] != needle[h]
+          implies
+          forall 0 <= x < table[i]: rhaystack[x..x+m-1] != needle[0..m-1].
+     table[0] remains uninitialized.  */
+  {
+    size_t i, j;
+
+    /* i = 1: Nothing to verify for x = 0.  */
+    table[1] = 1;
+    j = 0;
+
+    for (i = 2; i < m; i++)
+      {
+        /* Here: j = i-1 - table[i-1].
+           The inequality needle[x..i-1] != needle[0..i-1-x] is known to hold
+           for x < table[i-1], by induction.
+           Furthermore, if j>0: needle[i-1-j..i-2] = needle[0..j-1].  */
+        mbchar_t *b = &needle_mbchars[i - 1];
+
+        for (;;)
+          {
+            /* Invariants: The inequality needle[x..i-1] != needle[0..i-1-x]
+               is known to hold for x < i-1-j.
+               Furthermore, if j>0: needle[i-1-j..i-2] = needle[0..j-1].  */
+            if (mb_equal (*b, needle_mbchars[j]))
+              {
+                /* Set table[i] := i-1-j.  */
+                table[i] = i - ++j;
+                break;
+              }
+            /* The inequality needle[x..i-1] != needle[0..i-1-x] also holds
+               for x = i-1-j, because
+                 needle[i-1] != needle[j] = needle[i-1-x].  */
+            if (j == 0)
+              {
+                /* The inequality holds for all possible x.  */
+                table[i] = i;
+                break;
+              }
+            /* The inequality needle[x..i-1] != needle[0..i-1-x] also holds
+               for i-1-j < x < i-1-j+table[j], because for these x:
+                 needle[x..i-2]
+                 = needle[x-(i-1-j)..j-1]
+                 != needle[0..j-1-(x-(i-1-j))]  (by definition of table[j])
+                    = needle[0..i-2-x],
+               hence needle[x..i-1] != needle[0..i-1-x].
+               Furthermore
+                 needle[i-1-j+table[j]..i-2]
+                 = needle[table[j]..j-1]
+                 = needle[0..j-1-table[j]]  (by definition of table[j]).  */
+            j = j - table[j];
+          }
+        /* Here: j = i - table[i].  */
+      }
+  }
+
+  /* Search, using the table to accelerate the processing.  */
+  {
+    size_t j;
+    mbui_iterator_t rhaystack;
+    mbui_iterator_t phaystack;
+
+    *resultp = NULL;
+    j = 0;
+    mbui_init (rhaystack, haystack);
+    mbui_init (phaystack, haystack);
+    /* Invariant: phaystack = rhaystack + j.  */
+    while (mbui_avail (phaystack))
+      if (mb_equal (needle_mbchars[j], mbui_cur (phaystack)))
+        {
+          j++;
+          mbui_advance (phaystack);
+          if (j == m)
+            {
+              /* The entire needle has been found.  */
+              *resultp = mbui_cur_ptr (rhaystack);
+              break;
+            }
+        }
+      else if (j > 0)
+        {
+          /* Found a match of needle[0..j-1], mismatch at needle[j].  */
+          size_t count = table[j];
+          j -= count;
+          for (; count > 0; count--)
+            {
+              if (!mbui_avail (rhaystack))
+                abort ();
+              mbui_advance (rhaystack);
+            }
+        }
+      else
+        {
+          /* Found a mismatch at needle[0] already.  */
+          if (!mbui_avail (rhaystack))
+            abort ();
+          mbui_advance (rhaystack);
+          mbui_advance (phaystack);
+        }
+  }
+
+  freea (memory);
+  return true;
+}
+
+/* Find the first occurrence of the character string NEEDLE in the character
+   string HAYSTACK.  Return NULL if NEEDLE is not found in HAYSTACK.  */
+char *
+mbsstr (const char *haystack, const char *needle)
+{
+  /* Be careful not to look at the entire extent of haystack or needle
+     until needed.  This is useful because of these two cases:
+       - haystack may be very long, and a match of needle found early,
+       - needle may be very long, and not even a short initial segment of
+         needle may be found in haystack.  */
+  if (MB_CUR_MAX > 1)
+    {
+      mbui_iterator_t iter_needle;
+
+      mbui_init (iter_needle, needle);
+      if (mbui_avail (iter_needle))
+        {
+          /* Minimizing the worst-case complexity:
+             Let n = mbslen(haystack), m = mbslen(needle).
+             The naïve algorithm is O(n*m) worst-case.
+             The Knuth-Morris-Pratt algorithm is O(n) worst-case but it needs a
+             memory allocation.
+             To achieve linear complexity and yet amortize the cost of the
+             memory allocation, we activate the Knuth-Morris-Pratt algorithm
+             only once the naïve algorithm has already run for some time; more
+             precisely, when
+               - the outer loop count is >= 10,
+               - the average number of comparisons per outer loop is >= 5,
+               - the total number of comparisons is >= m.
+             But we try it only once.  If the memory allocation attempt failed,
+             we don't retry it.  */
+          bool try_kmp = true;
+          size_t outer_loop_count = 0;
+          size_t comparison_count = 0;
+          size_t last_ccount = 0;                  /* last comparison count */
+          mbui_iterator_t iter_needle_last_ccount; /* = needle + last_ccount */
+
+          mbui_iterator_t iter_haystack;
+
+          mbui_init (iter_needle_last_ccount, needle);
+          mbui_init (iter_haystack, haystack);
+          for (;; mbui_advance (iter_haystack))
+            {
+              if (!mbui_avail (iter_haystack))
+                /* No match.  */
+                return NULL;
+
+              /* See whether it's advisable to use an asymptotically faster
+                 algorithm.  */
+              if (try_kmp
+                  && outer_loop_count >= 10
+                  && comparison_count >= 5 * outer_loop_count)
+                {
+                  /* See if needle + comparison_count now reaches the end of
+                     needle.  */
+                  size_t count = comparison_count - last_ccount;
+                  for (;
+                       count > 0 && mbui_avail (iter_needle_last_ccount);
+                       count--)
+                    mbui_advance (iter_needle_last_ccount);
+                  last_ccount = comparison_count;
+                  if (!mbui_avail (iter_needle_last_ccount))
+                    {
+                      /* Try the Knuth-Morris-Pratt algorithm.  */
+                      const char *result;
+                      bool success =
+                        knuth_morris_pratt_multibyte (haystack, needle,
+                                                      &result);
+                      if (success)
+                        return (char *) result;
+                      try_kmp = false;
+                    }
+                }
+
+              outer_loop_count++;
+              comparison_count++;
+              if (mb_equal (mbui_cur (iter_haystack), mbui_cur (iter_needle)))
+                /* The first character matches.  */
+                {
+                  mbui_iterator_t rhaystack;
+                  mbui_iterator_t rneedle;
+
+                  memcpy (&rhaystack, &iter_haystack, sizeof (mbui_iterator_t));
+                  mbui_advance (rhaystack);
+
+                  mbui_init (rneedle, needle);
+                  if (!mbui_avail (rneedle))
+                    abort ();
+                  mbui_advance (rneedle);
+
+                  for (;; mbui_advance (rhaystack), mbui_advance (rneedle))
+                    {
+                      if (!mbui_avail (rneedle))
+                        /* Found a match.  */
+                        return (char *) mbui_cur_ptr (iter_haystack);
+                      if (!mbui_avail (rhaystack))
+                        /* No match.  */
+                        return NULL;
+                      comparison_count++;
+                      if (!mb_equal (mbui_cur (rhaystack), mbui_cur (rneedle)))
+                        /* Nothing in this round.  */
+                        break;
+                    }
+                }
+            }
+        }
+      else
+        return (char *) haystack;
+    }
+  else
+    {
+      if (*needle != '\0')
+        {
+          /* Minimizing the worst-case complexity:
+             Let n = strlen(haystack), m = strlen(needle).
+             The naïve algorithm is O(n*m) worst-case.
+             The Knuth-Morris-Pratt algorithm is O(n) worst-case but it needs a
+             memory allocation.
+             To achieve linear complexity and yet amortize the cost of the
+             memory allocation, we activate the Knuth-Morris-Pratt algorithm
+             only once the naïve algorithm has already run for some time; more
+             precisely, when
+               - the outer loop count is >= 10,
+               - the average number of comparisons per outer loop is >= 5,
+               - the total number of comparisons is >= m.
+             But we try it only once.  If the memory allocation attempt failed,
+             we don't retry it.  */
+          bool try_kmp = true;
+          size_t outer_loop_count = 0;
+          size_t comparison_count = 0;
+          size_t last_ccount = 0;                  /* last comparison count */
+          const char *needle_last_ccount = needle; /* = needle + last_ccount */
+
+          /* Speed up the following searches of needle by caching its first
+             character.  */
+          char b = *needle++;
+
+          for (;; haystack++)
+            {
+              if (*haystack == '\0')
+                /* No match.  */
+                return NULL;
+
+              /* See whether it's advisable to use an asymptotically faster
+                 algorithm.  */
+              if (try_kmp
+                  && outer_loop_count >= 10
+                  && comparison_count >= 5 * outer_loop_count)
+                {
+                  /* See if needle + comparison_count now reaches the end of
+                     needle.  */
+                  if (needle_last_ccount != NULL)
+                    {
+                      needle_last_ccount +=
+                        strnlen (needle_last_ccount,
+                                 comparison_count - last_ccount);
+                      if (*needle_last_ccount == '\0')
+                        needle_last_ccount = NULL;
+                      last_ccount = comparison_count;
+                    }
+                  if (needle_last_ccount == NULL)
+                    {
+                      /* Try the Knuth-Morris-Pratt algorithm.  */
+                      const unsigned char *result;
+                      bool success =
+                        knuth_morris_pratt ((const unsigned char *) haystack,
+                                            (const unsigned char *) (needle - 1),
+                                            strlen (needle - 1),
+                                            &result);
+                      if (success)
+                        return (char *) result;
+                      try_kmp = false;
+                    }
+                }
+
+              outer_loop_count++;
+              comparison_count++;
+              if (*haystack == b)
+                /* The first character matches.  */
+                {
+                  const char *rhaystack = haystack + 1;
+                  const char *rneedle = needle;
+
+                  for (;; rhaystack++, rneedle++)
+                    {
+                      if (*rneedle == '\0')
+                        /* Found a match.  */
+                        return (char *) haystack;
+                      if (*rhaystack == '\0')
+                        /* No match.  */
+                        return NULL;
+                      comparison_count++;
+                      if (*rhaystack != *rneedle)
+                        /* Nothing in this round.  */
+                        break;
+                    }
+                }
+            }
+        }
+      else
+        return (char *) haystack;
+    }
+}
diff --git a/src/grep/lib/mbtowc-impl.h b/src/grep/lib/mbtowc-impl.h
new file mode 100644
index 0000000..30d715d
--- /dev/null
+++ b/src/grep/lib/mbtowc-impl.h
@@ -0,0 +1,44 @@
+/* Convert multibyte character to wide character.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2011.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* We don't need a static internal state, because the encoding is not state
+   dependent, and when mbrtowc returns (size_t)(-2). we throw the result
+   away. */
+
+int
+mbtowc (wchar_t *pwc, const char *s, size_t n)
+{
+  if (s == NULL)
+    return 0;
+  else
+    {
+      mbstate_t state;
+      wchar_t wc;
+      size_t result;
+
+      memset (&state, 0, sizeof (mbstate_t));
+      result = mbrtowc (&wc, s, n, &state);
+      if (result == (size_t)-1 || result == (size_t)-2)
+        {
+          errno = EILSEQ;
+          return -1;
+        }
+      if (pwc != NULL)
+        *pwc = wc;
+      return (wc == 0 ? 0 : result);
+    }
+}
diff --git a/src/grep/lib/mbtowc-lock.c b/src/grep/lib/mbtowc-lock.c
new file mode 100644
index 0000000..0f7ae6c
--- /dev/null
+++ b/src/grep/lib/mbtowc-lock.c
@@ -0,0 +1,150 @@
+/* Return the internal lock used by mbrtowc and mbrtoc32.
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019-2020.  */
+
+#include <config.h>
+
+/* When it is known that the gl_get_mbtowc_lock function is defined
+   by a dependency library, it should not be defined here.  */
+#if OMIT_MBTOWC_LOCK
+
+/* This declaration is solely to ensure that after preprocessing
+   this file is never empty.  */
+typedef int dummy;
+
+#else
+
+/* This file defines the internal lock used by mbrtowc and mbrtoc32.
+   It is a separate compilation unit, so that only one copy of it is
+   present when linking statically.  */
+
+/* Prohibit renaming this symbol.  */
+# undef gl_get_mbtowc_lock
+
+/* Macro for exporting a symbol (function, not variable) defined in this file,
+   when compiled into a shared library.  */
+# ifndef DLL_EXPORTED
+#  if HAVE_VISIBILITY
+  /* Override the effect of the compiler option '-fvisibility=hidden'.  */
+#   define DLL_EXPORTED __attribute__((__visibility__("default")))
+#  elif defined _WIN32 || defined __CYGWIN__
+#   define DLL_EXPORTED __declspec(dllexport)
+#  else
+#   define DLL_EXPORTED
+#  endif
+# endif
+
+# if defined _WIN32 && !defined __CYGWIN__
+
+#  define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#  include <windows.h>
+
+#  include "windows-initguard.h"
+
+/* The return type is a 'CRITICAL_SECTION *', not a 'glwthread_mutex_t *',
+   because the latter is not guaranteed to be a stable ABI in the future.  */
+
+/* Make sure the function gets exported from DLLs.  */
+DLL_EXPORTED CRITICAL_SECTION *gl_get_mbtowc_lock (void);
+
+static glwthread_initguard_t guard = GLWTHREAD_INITGUARD_INIT;
+static CRITICAL_SECTION lock;
+
+/* Returns the internal lock used by mbrtowc and mbrtoc32.  */
+CRITICAL_SECTION *
+gl_get_mbtowc_lock (void)
+{
+  if (!guard.done)
+    {
+      if (InterlockedIncrement (&guard.started) == 0)
+        {
+          /* This thread is the first one to need the lock.  Initialize it.  */
+          InitializeCriticalSection (&lock);
+          guard.done = 1;
+        }
+      else
+        {
+          /* Don't let guard.started grow and wrap around.  */
+          InterlockedDecrement (&guard.started);
+          /* Yield the CPU while waiting for another thread to finish
+             initializing this mutex.  */
+          while (!guard.done)
+            Sleep (0);
+        }
+    }
+  return &lock;
+}
+
+# elif HAVE_PTHREAD_API
+
+#  include <pthread.h>
+
+static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+
+/* Make sure the function gets exported from shared libraries.  */
+DLL_EXPORTED pthread_mutex_t *gl_get_mbtowc_lock (void);
+
+/* Returns the internal lock used by mbrtowc and mbrtoc32.  */
+pthread_mutex_t *
+gl_get_mbtowc_lock (void)
+{
+  return &mutex;
+}
+
+# elif HAVE_THREADS_H
+
+#  include <threads.h>
+#  include <stdlib.h>
+
+static int volatile init_needed = 1;
+static once_flag init_once = ONCE_FLAG_INIT;
+static mtx_t mutex;
+
+static void
+atomic_init (void)
+{
+  if (mtx_init (&mutex, mtx_plain) != thrd_success)
+    abort ();
+  init_needed = 0;
+}
+
+/* Make sure the function gets exported from shared libraries.  */
+DLL_EXPORTED mtx_t *gl_get_mbtowc_lock (void);
+
+/* Returns the internal lock used by mbrtowc and mbrtoc32.  */
+mtx_t *
+gl_get_mbtowc_lock (void)
+{
+  if (init_needed)
+    call_once (&init_once, atomic_init);
+  return &mutex;
+}
+
+# endif
+
+# if (defined _WIN32 || defined __CYGWIN__) && !defined _MSC_VER
+/* Make sure the '__declspec(dllimport)' in mbrtowc.c and mbrtoc32.c does not
+   cause a link failure when no DLLs are involved.  */
+#  if defined _WIN64 || defined _LP64
+#   define IMP(x) __imp_##x
+#  else
+#   define IMP(x) _imp__##x
+#  endif
+void * IMP(gl_get_mbtowc_lock) = &gl_get_mbtowc_lock;
+# endif
+
+#endif
diff --git a/src/grep/lib/mbtowc-lock.h b/src/grep/lib/mbtowc-lock.h
new file mode 100644
index 0000000..d31b0b6
--- /dev/null
+++ b/src/grep/lib/mbtowc-lock.h
@@ -0,0 +1,125 @@
+/* Use the internal lock used by mbrtowc and mbrtoc32.
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019-2020.  */
+
+/* Use a lock, so that no two threads can invoke mbtowc at the same time.  */
+
+static inline int
+mbtowc_unlocked (wchar_t *pwc, const char *p, size_t m)
+{
+  /* Put the hidden internal state of mbtowc into its initial state.
+     This is needed at least with glibc, uClibc, and MSVC CRT.
+     See <https://sourceware.org/bugzilla/show_bug.cgi?id=9674>.  */
+  mbtowc (NULL, NULL, 0);
+
+  return mbtowc (pwc, p, m);
+}
+
+/* Prohibit renaming this symbol.  */
+#undef gl_get_mbtowc_lock
+
+#if GNULIB_MBRTOWC_SINGLE_THREAD
+
+/* All uses of this function are in a single thread.  No locking needed.  */
+
+static int
+mbtowc_with_lock (wchar_t *pwc, const char *p, size_t m)
+{
+  return mbtowc_unlocked (pwc, p, m);
+}
+
+#elif defined _WIN32 && !defined __CYGWIN__
+
+extern __declspec(dllimport) CRITICAL_SECTION *gl_get_mbtowc_lock (void);
+
+static int
+mbtowc_with_lock (wchar_t *pwc, const char *p, size_t m)
+{
+  CRITICAL_SECTION *lock = gl_get_mbtowc_lock ();
+  int ret;
+
+  EnterCriticalSection (lock);
+  ret = mbtowc_unlocked (pwc, p, m);
+  LeaveCriticalSection (lock);
+
+  return ret;
+}
+
+#elif HAVE_PTHREAD_API /* AIX, IRIX, Cygwin */
+
+extern
+# if defined _WIN32 || defined __CYGWIN__
+  __declspec(dllimport)
+# endif
+  pthread_mutex_t *gl_get_mbtowc_lock (void);
+
+# if HAVE_WEAK_SYMBOLS /* IRIX */
+
+   /* Avoid the need to link with '-lpthread'.  */
+#  pragma weak pthread_mutex_lock
+#  pragma weak pthread_mutex_unlock
+
+   /* Determine whether libpthread is in use.  */
+#  pragma weak pthread_mutexattr_gettype
+   /* See the comments in lock.h.  */
+#  define pthread_in_use() \
+     (pthread_mutexattr_gettype != NULL || c11_threads_in_use ())
+
+# else
+#  define pthread_in_use() 1
+# endif
+
+static int
+mbtowc_with_lock (wchar_t *pwc, const char *p, size_t m)
+{
+  if (pthread_in_use())
+    {
+      pthread_mutex_t *lock = gl_get_mbtowc_lock ();
+      int ret;
+
+      if (pthread_mutex_lock (lock))
+        abort ();
+      ret = mbtowc_unlocked (pwc, p, m);
+      if (pthread_mutex_unlock (lock))
+        abort ();
+
+      return ret;
+    }
+  else
+    return mbtowc_unlocked (pwc, p, m);
+}
+
+#elif HAVE_THREADS_H
+
+extern mtx_t *gl_get_mbtowc_lock (void);
+
+static int
+mbtowc_with_lock (wchar_t *pwc, const char *p, size_t m)
+{
+  mtx_t *lock = gl_get_mbtowc_lock ();
+  int ret;
+
+  if (mtx_lock (lock) != thrd_success)
+    abort ();
+  ret = mbtowc_unlocked (pwc, p, m);
+  if (mtx_unlock (lock) != thrd_success)
+    abort ();
+
+  return ret;
+}
+
+#endif
diff --git a/src/grep/lib/mbtowc.c b/src/grep/lib/mbtowc.c
new file mode 100644
index 0000000..47b431a
--- /dev/null
+++ b/src/grep/lib/mbtowc.c
@@ -0,0 +1,26 @@
+/* Convert multibyte character to wide character.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2011.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdlib.h>
+
+#include <errno.h>
+#include <string.h>
+#include <wchar.h>
+
+#include "mbtowc-impl.h"
diff --git a/src/grep/lib/mbuiter.c b/src/grep/lib/mbuiter.c
new file mode 100644
index 0000000..d740bb0
--- /dev/null
+++ b/src/grep/lib/mbuiter.c
@@ -0,0 +1,20 @@
+/* Iterating through multibyte strings: macros for multi-byte encodings.
+   Copyright (C) 2012-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#define MBUITER_INLINE _GL_EXTERN_INLINE
+#include "mbuiter.h"
diff --git a/src/grep/lib/mbuiter.h b/src/grep/lib/mbuiter.h
new file mode 100644
index 0000000..8e87c5c
--- /dev/null
+++ b/src/grep/lib/mbuiter.h
@@ -0,0 +1,225 @@
+/* Iterating through multibyte strings: macros for multi-byte encodings.
+   Copyright (C) 2001, 2005, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>.  */
+
+/* The macros in this file implement forward iteration through a
+   multi-byte string, without knowing its length a-priori.
+
+   With these macros, an iteration loop that looks like
+
+      char *iter;
+      for (iter = buf; *iter != '\0'; iter++)
+        {
+          do_something (*iter);
+        }
+
+   becomes
+
+      mbui_iterator_t iter;
+      for (mbui_init (iter, buf); mbui_avail (iter); mbui_advance (iter))
+        {
+          do_something (mbui_cur_ptr (iter), mb_len (mbui_cur (iter)));
+        }
+
+   The benefit of these macros over plain use of mbrtowc is:
+   - Handling of invalid multibyte sequences is possible without
+     making the code more complicated, while still preserving the
+     invalid multibyte sequences.
+
+   Compared to mbiter.h, the macros here don't need to know the string's
+   length a-priori.  The downside is that at each step, the look-ahead
+   that guards against overrunning the terminating '\0' is more expensive.
+   The mbui_* macros are therefore suitable when there is a high probability
+   that only the first few multibyte characters need to be inspected.
+   Whereas the mbi_* macros are better if usually the iteration runs
+   through the entire string.
+
+   mbui_iterator_t
+     is a type usable for variable declarations.
+
+   mbui_init (iter, startptr)
+     initializes the iterator, starting at startptr.
+
+   mbui_avail (iter)
+     returns true if there are more multibyte characters available before
+     the end of string is reached. In this case, mbui_cur (iter) is
+     initialized to the next multibyte character.
+
+   mbui_advance (iter)
+     advances the iterator by one multibyte character.
+
+   mbui_cur (iter)
+     returns the current multibyte character, of type mbchar_t.  All the
+     macros defined in mbchar.h can be used on it.
+
+   mbui_cur_ptr (iter)
+     return a pointer to the beginning of the current multibyte character.
+
+   mbui_reloc (iter, ptrdiff)
+     relocates iterator when the string is moved by ptrdiff bytes.
+
+   mbui_copy (&destiter, &srciter)
+     copies srciter to destiter.
+
+   Here are the function prototypes of the macros.
+
+   extern void          mbui_init (mbui_iterator_t iter, const char *startptr);
+   extern bool          mbui_avail (mbui_iterator_t iter);
+   extern void          mbui_advance (mbui_iterator_t iter);
+   extern mbchar_t      mbui_cur (mbui_iterator_t iter);
+   extern const char *  mbui_cur_ptr (mbui_iterator_t iter);
+   extern void          mbui_reloc (mbui_iterator_t iter, ptrdiff_t ptrdiff);
+   extern void          mbui_copy (mbui_iterator_t *new, const mbui_iterator_t *old);
+ */
+
+#ifndef _MBUITER_H
+#define _MBUITER_H 1
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+
+#include "mbchar.h"
+#include "strnlen1.h"
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef MBUITER_INLINE
+# define MBUITER_INLINE _GL_INLINE
+#endif
+
+struct mbuiter_multi
+{
+  bool in_shift;        /* true if next byte may not be interpreted as ASCII */
+  mbstate_t state;      /* if in_shift: current shift state */
+  bool next_done;       /* true if mbui_avail has already filled the following */
+  struct mbchar cur;    /* the current character:
+        const char *cur.ptr             pointer to current character
+        The following are only valid after mbui_avail.
+        size_t cur.bytes                number of bytes of current character
+        bool cur.wc_valid               true if wc is a valid wide character
+        wchar_t cur.wc                  if wc_valid: the current character
+        */
+};
+
+MBUITER_INLINE void
+mbuiter_multi_next (struct mbuiter_multi *iter)
+{
+  if (iter->next_done)
+    return;
+  if (iter->in_shift)
+    goto with_shift;
+  /* Handle most ASCII characters quickly, without calling mbrtowc().  */
+  if (is_basic (*iter->cur.ptr))
+    {
+      /* These characters are part of the basic character set.  ISO C 99
+         guarantees that their wide character code is identical to their
+         char code.  */
+      iter->cur.bytes = 1;
+      iter->cur.wc = *iter->cur.ptr;
+      iter->cur.wc_valid = true;
+    }
+  else
+    {
+      assert (mbsinit (&iter->state));
+      iter->in_shift = true;
+    with_shift:
+      iter->cur.bytes = mbrtowc (&iter->cur.wc, iter->cur.ptr,
+                                 strnlen1 (iter->cur.ptr, MB_CUR_MAX),
+                                 &iter->state);
+      if (iter->cur.bytes == (size_t) -1)
+        {
+          /* An invalid multibyte sequence was encountered.  */
+          iter->cur.bytes = 1;
+          iter->cur.wc_valid = false;
+          /* Whether to set iter->in_shift = false and reset iter->state
+             or not is not very important; the string is bogus anyway.  */
+        }
+      else if (iter->cur.bytes == (size_t) -2)
+        {
+          /* An incomplete multibyte character at the end.  */
+          iter->cur.bytes = strlen (iter->cur.ptr);
+          iter->cur.wc_valid = false;
+          /* Whether to set iter->in_shift = false and reset iter->state
+             or not is not important; the string end is reached anyway.  */
+        }
+      else
+        {
+          if (iter->cur.bytes == 0)
+            {
+              /* A null wide character was encountered.  */
+              iter->cur.bytes = 1;
+              assert (*iter->cur.ptr == '\0');
+              assert (iter->cur.wc == 0);
+            }
+          iter->cur.wc_valid = true;
+
+          /* When in the initial state, we can go back treating ASCII
+             characters more quickly.  */
+          if (mbsinit (&iter->state))
+            iter->in_shift = false;
+        }
+    }
+  iter->next_done = true;
+}
+
+MBUITER_INLINE void
+mbuiter_multi_reloc (struct mbuiter_multi *iter, ptrdiff_t ptrdiff)
+{
+  iter->cur.ptr += ptrdiff;
+}
+
+MBUITER_INLINE void
+mbuiter_multi_copy (struct mbuiter_multi *new_iter, const struct mbuiter_multi *old_iter)
+{
+  if ((new_iter->in_shift = old_iter->in_shift))
+    memcpy (&new_iter->state, &old_iter->state, sizeof (mbstate_t));
+  else
+    memset (&new_iter->state, 0, sizeof (mbstate_t));
+  new_iter->next_done = old_iter->next_done;
+  mb_copy (&new_iter->cur, &old_iter->cur);
+}
+
+/* Iteration macros.  */
+typedef struct mbuiter_multi mbui_iterator_t;
+#define mbui_init(iter, startptr) \
+  ((iter).cur.ptr = (startptr), \
+   (iter).in_shift = false, memset (&(iter).state, '\0', sizeof (mbstate_t)), \
+   (iter).next_done = false)
+#define mbui_avail(iter) \
+  (mbuiter_multi_next (&(iter)), !mb_isnul ((iter).cur))
+#define mbui_advance(iter) \
+  ((iter).cur.ptr += (iter).cur.bytes, (iter).next_done = false)
+
+/* Access to the current character.  */
+#define mbui_cur(iter) (iter).cur
+#define mbui_cur_ptr(iter) (iter).cur.ptr
+
+/* Relocation.  */
+#define mbui_reloc(iter, ptrdiff) mbuiter_multi_reloc (&iter, ptrdiff)
+
+/* Copying an iterator.  */
+#define mbui_copy mbuiter_multi_copy
+
+_GL_INLINE_HEADER_END
+
+#endif /* _MBUITER_H */
diff --git a/src/grep/lib/memchr.c b/src/grep/lib/memchr.c
new file mode 100644
index 0000000..56fd59d
--- /dev/null
+++ b/src/grep/lib/memchr.c
@@ -0,0 +1,172 @@
+/* Copyright (C) 1991, 1993, 1996-1997, 1999-2000, 2003-2004, 2006, 2008-2021
+   Free Software Foundation, Inc.
+
+   Based on strlen implementation by Torbjorn Granlund (tege@sics.se),
+   with help from Dan Sahlin (dan@sics.se) and
+   commentary by Jim Blandy (jimb@ai.mit.edu);
+   adaptation to memchr suggested by Dick Karpinski (dick@cca.ucsf.edu),
+   and implemented by Roland McGrath (roland@ai.mit.edu).
+
+   NOTE: The canonical source of this file is maintained with the GNU C Library.
+   Bugs can be reported to bug-glibc@prep.ai.mit.edu.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _LIBC
+# include <config.h>
+#endif
+
+#include <string.h>
+
+#include <stddef.h>
+
+#if defined _LIBC
+# include <memcopy.h>
+#else
+# define reg_char char
+#endif
+
+#include <limits.h>
+
+#if HAVE_BP_SYM_H || defined _LIBC
+# include <bp-sym.h>
+#else
+# define BP_SYM(sym) sym
+#endif
+
+#undef __memchr
+#ifdef _LIBC
+# undef memchr
+#endif
+
+#ifndef weak_alias
+# define __memchr memchr
+#endif
+
+/* Search no more than N bytes of S for C.  */
+void *
+__memchr (void const *s, int c_in, size_t n)
+{
+  /* On 32-bit hardware, choosing longword to be a 32-bit unsigned
+     long instead of a 64-bit uintmax_t tends to give better
+     performance.  On 64-bit hardware, unsigned long is generally 64
+     bits already.  Change this typedef to experiment with
+     performance.  */
+  typedef unsigned long int longword;
+
+  const unsigned char *char_ptr;
+  const longword *longword_ptr;
+  longword repeated_one;
+  longword repeated_c;
+  unsigned reg_char c;
+
+  c = (unsigned char) c_in;
+
+  /* Handle the first few bytes by reading one byte at a time.
+     Do this until CHAR_PTR is aligned on a longword boundary.  */
+  for (char_ptr = (const unsigned char *) s;
+       n > 0 && (size_t) char_ptr % sizeof (longword) != 0;
+       --n, ++char_ptr)
+    if (*char_ptr == c)
+      return (void *) char_ptr;
+
+  longword_ptr = (const longword *) char_ptr;
+
+  /* All these elucidatory comments refer to 4-byte longwords,
+     but the theory applies equally well to any size longwords.  */
+
+  /* Compute auxiliary longword values:
+     repeated_one is a value which has a 1 in every byte.
+     repeated_c has c in every byte.  */
+  repeated_one = 0x01010101;
+  repeated_c = c | (c << 8);
+  repeated_c |= repeated_c << 16;
+  if (0xffffffffU < (longword) -1)
+    {
+      repeated_one |= repeated_one << 31 << 1;
+      repeated_c |= repeated_c << 31 << 1;
+      if (8 < sizeof (longword))
+        {
+          size_t i;
+
+          for (i = 64; i < sizeof (longword) * 8; i *= 2)
+            {
+              repeated_one |= repeated_one << i;
+              repeated_c |= repeated_c << i;
+            }
+        }
+    }
+
+  /* Instead of the traditional loop which tests each byte, we will test a
+     longword at a time.  The tricky part is testing if *any of the four*
+     bytes in the longword in question are equal to c.  We first use an xor
+     with repeated_c.  This reduces the task to testing whether *any of the
+     four* bytes in longword1 is zero.
+
+     We compute tmp =
+       ((longword1 - repeated_one) & ~longword1) & (repeated_one << 7).
+     That is, we perform the following operations:
+       1. Subtract repeated_one.
+       2. & ~longword1.
+       3. & a mask consisting of 0x80 in every byte.
+     Consider what happens in each byte:
+       - If a byte of longword1 is zero, step 1 and 2 transform it into 0xff,
+         and step 3 transforms it into 0x80.  A carry can also be propagated
+         to more significant bytes.
+       - If a byte of longword1 is nonzero, let its lowest 1 bit be at
+         position k (0 <= k <= 7); so the lowest k bits are 0.  After step 1,
+         the byte ends in a single bit of value 0 and k bits of value 1.
+         After step 2, the result is just k bits of value 1: 2^k - 1.  After
+         step 3, the result is 0.  And no carry is produced.
+     So, if longword1 has only non-zero bytes, tmp is zero.
+     Whereas if longword1 has a zero byte, call j the position of the least
+     significant zero byte.  Then the result has a zero at positions 0, ...,
+     j-1 and a 0x80 at position j.  We cannot predict the result at the more
+     significant bytes (positions j+1..3), but it does not matter since we
+     already have a non-zero bit at position 8*j+7.
+
+     So, the test whether any byte in longword1 is zero is equivalent to
+     testing whether tmp is nonzero.  */
+
+  while (n >= sizeof (longword))
+    {
+      longword longword1 = *longword_ptr ^ repeated_c;
+
+      if ((((longword1 - repeated_one) & ~longword1)
+           & (repeated_one << 7)) != 0)
+        break;
+      longword_ptr++;
+      n -= sizeof (longword);
+    }
+
+  char_ptr = (const unsigned char *) longword_ptr;
+
+  /* At this point, we know that either n < sizeof (longword), or one of the
+     sizeof (longword) bytes starting at char_ptr is == c.  On little-endian
+     machines, we could determine the first such byte without any further
+     memory accesses, just by looking at the tmp result from the last loop
+     iteration.  But this does not work on big-endian machines.  Choose code
+     that works in both cases.  */
+
+  for (; n > 0; --n, ++char_ptr)
+    {
+      if (*char_ptr == c)
+        return (void *) char_ptr;
+    }
+
+  return NULL;
+}
+#ifdef weak_alias
+weak_alias (__memchr, BP_SYM (memchr))
+#endif
diff --git a/src/grep/lib/memchr.valgrind b/src/grep/lib/memchr.valgrind
new file mode 100644
index 0000000..4f16481
--- /dev/null
+++ b/src/grep/lib/memchr.valgrind
@@ -0,0 +1,30 @@
+# Suppress a valgrind message about use of uninitialized memory in memchr().
+
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+#
+# This file is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as
+# published by the Free Software Foundation; either version 2.1 of the
+# License, or (at your option) any later version.
+#
+# This file is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# POSIX states that when the character is found, memchr must not read extra
+# bytes in an overestimated length (for example, where memchr is used to
+# implement strnlen).  However, we use a safe word read to provide a speedup.
+{
+    memchr-value4
+    Memcheck:Value4
+    fun:rpl_memchr
+}
+{
+    memchr-value8
+    Memcheck:Value8
+    fun:rpl_memchr
+}
diff --git a/src/grep/lib/memchr2.c b/src/grep/lib/memchr2.c
new file mode 100644
index 0000000..9466b3e
--- /dev/null
+++ b/src/grep/lib/memchr2.c
@@ -0,0 +1,169 @@
+/* Copyright (C) 1991, 1993, 1996-1997, 1999-2000, 2003-2004, 2006, 2008-2021
+   Free Software Foundation, Inc.
+
+   Based on strlen implementation by Torbjorn Granlund (tege@sics.se),
+   with help from Dan Sahlin (dan@sics.se) and
+   commentary by Jim Blandy (jimb@ai.mit.edu);
+   adaptation to memchr suggested by Dick Karpinski (dick@cca.ucsf.edu),
+   and implemented in glibc by Roland McGrath (roland@ai.mit.edu).
+   Extension to memchr2 implemented by Eric Blake (ebb9@byu.net).
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "memchr2.h"
+
+#include <limits.h>
+#include <stdint.h>
+#include <string.h>
+
+/* Return the first address of either C1 or C2 (treated as unsigned
+   char) that occurs within N bytes of the memory region S.  If
+   neither byte appears, return NULL.  */
+void *
+memchr2 (void const *s, int c1_in, int c2_in, size_t n)
+{
+  /* On 32-bit hardware, choosing longword to be a 32-bit unsigned
+     long instead of a 64-bit uintmax_t tends to give better
+     performance.  On 64-bit hardware, unsigned long is generally 64
+     bits already.  Change this typedef to experiment with
+     performance.  */
+  typedef unsigned long int longword;
+
+  const unsigned char *char_ptr;
+  void const *void_ptr;
+  const longword *longword_ptr;
+  longword repeated_one;
+  longword repeated_c1;
+  longword repeated_c2;
+  unsigned char c1;
+  unsigned char c2;
+
+  c1 = (unsigned char) c1_in;
+  c2 = (unsigned char) c2_in;
+
+  if (c1 == c2)
+    return memchr (s, c1, n);
+
+  /* Handle the first few bytes by reading one byte at a time.
+     Do this until VOID_PTR is aligned on a longword boundary.  */
+  for (void_ptr = s;
+       n > 0 && (uintptr_t) void_ptr % sizeof (longword) != 0;
+       --n)
+    {
+      char_ptr = void_ptr;
+      if (*char_ptr == c1 || *char_ptr == c2)
+        return (void *) void_ptr;
+      void_ptr = char_ptr + 1;
+    }
+
+  longword_ptr = void_ptr;
+
+  /* All these elucidatory comments refer to 4-byte longwords,
+     but the theory applies equally well to any size longwords.  */
+
+  /* Compute auxiliary longword values:
+     repeated_one is a value which has a 1 in every byte.
+     repeated_c1 has c1 in every byte.
+     repeated_c2 has c2 in every byte.  */
+  repeated_one = 0x01010101;
+  repeated_c1 = c1 | (c1 << 8);
+  repeated_c2 = c2 | (c2 << 8);
+  repeated_c1 |= repeated_c1 << 16;
+  repeated_c2 |= repeated_c2 << 16;
+  if (0xffffffffU < (longword) -1)
+    {
+      repeated_one |= repeated_one << 31 << 1;
+      repeated_c1 |= repeated_c1 << 31 << 1;
+      repeated_c2 |= repeated_c2 << 31 << 1;
+      if (8 < sizeof (longword))
+        {
+          size_t i;
+
+          for (i = 64; i < sizeof (longword) * 8; i *= 2)
+            {
+              repeated_one |= repeated_one << i;
+              repeated_c1 |= repeated_c1 << i;
+              repeated_c2 |= repeated_c2 << i;
+            }
+        }
+    }
+
+  /* Instead of the traditional loop which tests each byte, we will test a
+     longword at a time.  The tricky part is testing if *any of the four*
+     bytes in the longword in question are equal to c1 or c2.  We first use
+     an xor with repeated_c1 and repeated_c2, respectively.  This reduces
+     the task to testing whether *any of the four* bytes in longword1 or
+     longword2 is zero.
+
+     Let's consider longword1.  We compute tmp1 =
+       ((longword1 - repeated_one) & ~longword1) & (repeated_one << 7).
+     That is, we perform the following operations:
+       1. Subtract repeated_one.
+       2. & ~longword1.
+       3. & a mask consisting of 0x80 in every byte.
+     Consider what happens in each byte:
+       - If a byte of longword1 is zero, step 1 and 2 transform it into 0xff,
+         and step 3 transforms it into 0x80.  A carry can also be propagated
+         to more significant bytes.
+       - If a byte of longword1 is nonzero, let its lowest 1 bit be at
+         position k (0 <= k <= 7); so the lowest k bits are 0.  After step 1,
+         the byte ends in a single bit of value 0 and k bits of value 1.
+         After step 2, the result is just k bits of value 1: 2^k - 1.  After
+         step 3, the result is 0.  And no carry is produced.
+     So, if longword1 has only non-zero bytes, tmp1 is zero.
+     Whereas if longword1 has a zero byte, call j the position of the least
+     significant zero byte.  Then the result has a zero at positions 0, ...,
+     j-1 and a 0x80 at position j.  We cannot predict the result at the more
+     significant bytes (positions j+1..3), but it does not matter since we
+     already have a non-zero bit at position 8*j+7.
+
+     Similarly, we compute tmp2 =
+       ((longword2 - repeated_one) & ~longword2) & (repeated_one << 7).
+
+     The test whether any byte in longword1 or longword2 is zero is equivalent
+     to testing whether tmp1 is nonzero or tmp2 is nonzero.  We can combine
+     this into a single test, whether (tmp1 | tmp2) is nonzero.  */
+
+  while (n >= sizeof (longword))
+    {
+      longword longword1 = *longword_ptr ^ repeated_c1;
+      longword longword2 = *longword_ptr ^ repeated_c2;
+
+      if (((((longword1 - repeated_one) & ~longword1)
+            | ((longword2 - repeated_one) & ~longword2))
+           & (repeated_one << 7)) != 0)
+        break;
+      longword_ptr++;
+      n -= sizeof (longword);
+    }
+
+  char_ptr = (const unsigned char *) longword_ptr;
+
+  /* At this point, we know that either n < sizeof (longword), or one of the
+     sizeof (longword) bytes starting at char_ptr is == c1 or == c2.  On
+     little-endian machines, we could determine the first such byte without
+     any further memory accesses, just by looking at the (tmp1 | tmp2) result
+     from the last loop iteration.  But this does not work on big-endian
+     machines.  Choose code that works in both cases.  */
+
+  for (; n > 0; --n, ++char_ptr)
+    {
+      if (*char_ptr == c1 || *char_ptr == c2)
+        return (void *) char_ptr;
+    }
+
+  return NULL;
+}
diff --git a/src/grep/lib/memchr2.h b/src/grep/lib/memchr2.h
new file mode 100644
index 0000000..c9ed118
--- /dev/null
+++ b/src/grep/lib/memchr2.h
@@ -0,0 +1,32 @@
+/* Scan memory for the first of two bytes.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Return the first address of either C1 or C2 (treated as unsigned
+   char) that occurs within N bytes of the memory region S.  If
+   neither byte appears, return NULL.  */
+
+extern void *memchr2 (void const *s, int c1, int c2, size_t n)
+  _GL_ATTRIBUTE_PURE;
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/src/grep/lib/memchr2.valgrind b/src/grep/lib/memchr2.valgrind
new file mode 100644
index 0000000..aa095b1
--- /dev/null
+++ b/src/grep/lib/memchr2.valgrind
@@ -0,0 +1,30 @@
+# Suppress a valgrind message about use of uninitialized memory in memchr2().
+
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+#
+# This file is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as
+# published by the Free Software Foundation; either version 2.1 of the
+# License, or (at your option) any later version.
+#
+# This file is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# Like memchr, it is safe to overestimate the length when the terminator
+# is guaranteed to be found.  In this case, we may end up reading a word
+# that is partially uninitialized, but this use is OK for a speedup.
+{
+    memchr2-value4
+    Memcheck:Value4
+    fun:memchr2
+}
+{
+    memchr2-value8
+    Memcheck:Value8
+    fun:memchr2
+}
diff --git a/src/grep/lib/mempcpy.c b/src/grep/lib/mempcpy.c
new file mode 100644
index 0000000..cacacdb
--- /dev/null
+++ b/src/grep/lib/mempcpy.c
@@ -0,0 +1,33 @@
+/* Copy memory area and return pointer after last written byte.
+   Copyright (C) 2003, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <string.h>
+
+/* A function definition is only needed if HAVE_MEMPCPY is not defined.  */
+#if !HAVE_MEMPCPY
+
+/* Copy N bytes of SRC to DEST, return pointer to bytes after the
+   last written byte.  */
+void *
+mempcpy (void *dest, const void *src, size_t n)
+{
+  return (char *) memcpy (dest, src, n) + n;
+}
+
+#endif
diff --git a/src/grep/lib/memrchr.c b/src/grep/lib/memrchr.c
new file mode 100644
index 0000000..e0d47d1
--- /dev/null
+++ b/src/grep/lib/memrchr.c
@@ -0,0 +1,161 @@
+/* memrchr -- find the last occurrence of a byte in a memory block
+
+   Copyright (C) 1991, 1993, 1996-1997, 1999-2000, 2003-2021 Free Software
+   Foundation, Inc.
+
+   Based on strlen implementation by Torbjorn Granlund (tege@sics.se),
+   with help from Dan Sahlin (dan@sics.se) and
+   commentary by Jim Blandy (jimb@ai.mit.edu);
+   adaptation to memchr suggested by Dick Karpinski (dick@cca.ucsf.edu),
+   and implemented by Roland McGrath (roland@ai.mit.edu).
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#if defined _LIBC
+# include <memcopy.h>
+#else
+# include <config.h>
+# define reg_char char
+#endif
+
+#include <string.h>
+#include <limits.h>
+
+#undef __memrchr
+#ifdef _LIBC
+# undef memrchr
+#endif
+
+#ifndef weak_alias
+# define __memrchr memrchr
+#endif
+
+/* Search no more than N bytes of S for C.  */
+void *
+__memrchr (void const *s, int c_in, size_t n)
+{
+  /* On 32-bit hardware, choosing longword to be a 32-bit unsigned
+     long instead of a 64-bit uintmax_t tends to give better
+     performance.  On 64-bit hardware, unsigned long is generally 64
+     bits already.  Change this typedef to experiment with
+     performance.  */
+  typedef unsigned long int longword;
+
+  const unsigned char *char_ptr;
+  const longword *longword_ptr;
+  longword repeated_one;
+  longword repeated_c;
+  unsigned reg_char c;
+
+  c = (unsigned char) c_in;
+
+  /* Handle the last few bytes by reading one byte at a time.
+     Do this until CHAR_PTR is aligned on a longword boundary.  */
+  for (char_ptr = (const unsigned char *) s + n;
+       n > 0 && (size_t) char_ptr % sizeof (longword) != 0;
+       --n)
+    if (*--char_ptr == c)
+      return (void *) char_ptr;
+
+  longword_ptr = (const void *) char_ptr;
+
+  /* All these elucidatory comments refer to 4-byte longwords,
+     but the theory applies equally well to any size longwords.  */
+
+  /* Compute auxiliary longword values:
+     repeated_one is a value which has a 1 in every byte.
+     repeated_c has c in every byte.  */
+  repeated_one = 0x01010101;
+  repeated_c = c | (c << 8);
+  repeated_c |= repeated_c << 16;
+  if (0xffffffffU < (longword) -1)
+    {
+      repeated_one |= repeated_one << 31 << 1;
+      repeated_c |= repeated_c << 31 << 1;
+      if (8 < sizeof (longword))
+        {
+          size_t i;
+
+          for (i = 64; i < sizeof (longword) * 8; i *= 2)
+            {
+              repeated_one |= repeated_one << i;
+              repeated_c |= repeated_c << i;
+            }
+        }
+    }
+
+  /* Instead of the traditional loop which tests each byte, we will test a
+     longword at a time.  The tricky part is testing if *any of the four*
+     bytes in the longword in question are equal to c.  We first use an xor
+     with repeated_c.  This reduces the task to testing whether *any of the
+     four* bytes in longword1 is zero.
+
+     We compute tmp =
+       ((longword1 - repeated_one) & ~longword1) & (repeated_one << 7).
+     That is, we perform the following operations:
+       1. Subtract repeated_one.
+       2. & ~longword1.
+       3. & a mask consisting of 0x80 in every byte.
+     Consider what happens in each byte:
+       - If a byte of longword1 is zero, step 1 and 2 transform it into 0xff,
+         and step 3 transforms it into 0x80.  A carry can also be propagated
+         to more significant bytes.
+       - If a byte of longword1 is nonzero, let its lowest 1 bit be at
+         position k (0 <= k <= 7); so the lowest k bits are 0.  After step 1,
+         the byte ends in a single bit of value 0 and k bits of value 1.
+         After step 2, the result is just k bits of value 1: 2^k - 1.  After
+         step 3, the result is 0.  And no carry is produced.
+     So, if longword1 has only non-zero bytes, tmp is zero.
+     Whereas if longword1 has a zero byte, call j the position of the least
+     significant zero byte.  Then the result has a zero at positions 0, ...,
+     j-1 and a 0x80 at position j.  We cannot predict the result at the more
+     significant bytes (positions j+1..3), but it does not matter since we
+     already have a non-zero bit at position 8*j+7.
+
+     So, the test whether any byte in longword1 is zero is equivalent to
+     testing whether tmp is nonzero.  */
+
+  while (n >= sizeof (longword))
+    {
+      longword longword1 = *--longword_ptr ^ repeated_c;
+
+      if ((((longword1 - repeated_one) & ~longword1)
+           & (repeated_one << 7)) != 0)
+        {
+          longword_ptr++;
+          break;
+        }
+      n -= sizeof (longword);
+    }
+
+  char_ptr = (const unsigned char *) longword_ptr;
+
+  /* At this point, we know that either n < sizeof (longword), or one of the
+     sizeof (longword) bytes starting at char_ptr is == c.  On little-endian
+     machines, we could determine the first such byte without any further
+     memory accesses, just by looking at the tmp result from the last loop
+     iteration.  But this does not work on big-endian machines.  Choose code
+     that works in both cases.  */
+
+  while (n-- > 0)
+    {
+      if (*--char_ptr == c)
+        return (void *) char_ptr;
+    }
+
+  return NULL;
+}
+#ifdef weak_alias
+weak_alias (__memrchr, memrchr)
+#endif
diff --git a/src/grep/lib/minmax.h b/src/grep/lib/minmax.h
new file mode 100644
index 0000000..a03361b
--- /dev/null
+++ b/src/grep/lib/minmax.h
@@ -0,0 +1,60 @@
+/* MIN, MAX macros.
+   Copyright (C) 1995, 1998, 2001, 2003, 2005, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _MINMAX_H
+#define _MINMAX_H
+
+/* Note: MIN, MAX are also defined in <sys/param.h> on some systems
+   (glibc, IRIX, HP-UX, OSF/1).  Therefore you might get warnings about
+   MIN, MAX macro redefinitions on some systems; the workaround is to
+   #include this file as the last one among the #include list.  */
+
+/* Before we define the following symbols we get the <limits.h> file
+   since otherwise we get redefinitions on some systems if <limits.h> is
+   included after this file.  Likewise for <sys/param.h>.
+   If more than one of these system headers define MIN and MAX, pick just
+   one of the headers (because the definitions most likely are the same).  */
+#if HAVE_MINMAX_IN_LIMITS_H
+# include <limits.h>
+#elif HAVE_MINMAX_IN_SYS_PARAM_H
+# include <sys/param.h>
+#endif
+
+/* Note: MIN and MAX should be used with two arguments of the
+   same type.  They might not return the minimum and maximum of their two
+   arguments, if the arguments have different types or have unusual
+   floating-point values.  For example, on a typical host with 32-bit 'int',
+   64-bit 'long long', and 64-bit IEEE 754 'double' types:
+
+     MAX (-1, 2147483648) returns 4294967295.
+     MAX (9007199254740992.0, 9007199254740993) returns 9007199254740992.0.
+     MAX (NaN, 0.0) returns 0.0.
+     MAX (+0.0, -0.0) returns -0.0.
+
+   and in each case the answer is in some sense bogus.  */
+
+/* MAX(a,b) returns the maximum of A and B.  */
+#ifndef MAX
+# define MAX(a,b) ((a) > (b) ? (a) : (b))
+#endif
+
+/* MIN(a,b) returns the minimum of A and B.  */
+#ifndef MIN
+# define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
+
+#endif /* _MINMAX_H */
diff --git a/src/grep/lib/msvc-inval.c b/src/grep/lib/msvc-inval.c
new file mode 100644
index 0000000..a23dac9
--- /dev/null
+++ b/src/grep/lib/msvc-inval.c
@@ -0,0 +1,129 @@
+/* Invalid parameter handler for MSVC runtime libraries.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "msvc-inval.h"
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
+    && !(MSVC_INVALID_PARAMETER_HANDLING == SANE_LIBRARY_HANDLING)
+
+/* Get _invalid_parameter_handler type and _set_invalid_parameter_handler
+   declaration.  */
+# include <stdlib.h>
+
+# if MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
+
+static void __cdecl
+gl_msvc_invalid_parameter_handler (const wchar_t *expression,
+                                   const wchar_t *function,
+                                   const wchar_t *file,
+                                   unsigned int line,
+                                   uintptr_t dummy)
+{
+}
+
+# else
+
+/* Get declarations of the native Windows API functions.  */
+#  define WIN32_LEAN_AND_MEAN
+#  include <windows.h>
+
+#  if defined _MSC_VER
+
+static void __cdecl
+gl_msvc_invalid_parameter_handler (const wchar_t *expression,
+                                   const wchar_t *function,
+                                   const wchar_t *file,
+                                   unsigned int line,
+                                   uintptr_t dummy)
+{
+  RaiseException (STATUS_GNULIB_INVALID_PARAMETER, 0, 0, NULL);
+}
+
+#  else
+
+/* An index to thread-local storage.  */
+static DWORD tls_index;
+static int tls_initialized /* = 0 */;
+
+/* Used as a fallback only.  */
+static struct gl_msvc_inval_per_thread not_per_thread;
+
+struct gl_msvc_inval_per_thread *
+gl_msvc_inval_current (void)
+{
+  if (!tls_initialized)
+    {
+      tls_index = TlsAlloc ();
+      tls_initialized = 1;
+    }
+  if (tls_index == TLS_OUT_OF_INDEXES)
+    /* TlsAlloc had failed.  */
+    return &not_per_thread;
+  else
+    {
+      struct gl_msvc_inval_per_thread *pointer =
+        (struct gl_msvc_inval_per_thread *) TlsGetValue (tls_index);
+      if (pointer == NULL)
+        {
+          /* First call.  Allocate a new 'struct gl_msvc_inval_per_thread'.  */
+          pointer =
+            (struct gl_msvc_inval_per_thread *)
+            malloc (sizeof (struct gl_msvc_inval_per_thread));
+          if (pointer == NULL)
+            /* Could not allocate memory.  Use the global storage.  */
+            pointer = &not_per_thread;
+          TlsSetValue (tls_index, pointer);
+        }
+      return pointer;
+    }
+}
+
+static void __cdecl
+gl_msvc_invalid_parameter_handler (const wchar_t *expression,
+                                   const wchar_t *function,
+                                   const wchar_t *file,
+                                   unsigned int line,
+                                   uintptr_t dummy)
+{
+  struct gl_msvc_inval_per_thread *current = gl_msvc_inval_current ();
+  if (current->restart_valid)
+    longjmp (current->restart, 1);
+  else
+    /* An invalid parameter notification from outside the gnulib code.
+       Give the caller a chance to intervene.  */
+    RaiseException (STATUS_GNULIB_INVALID_PARAMETER, 0, 0, NULL);
+}
+
+#  endif
+
+# endif
+
+static int gl_msvc_inval_initialized /* = 0 */;
+
+void
+gl_msvc_inval_ensure_handler (void)
+{
+  if (gl_msvc_inval_initialized == 0)
+    {
+      _set_invalid_parameter_handler (gl_msvc_invalid_parameter_handler);
+      gl_msvc_inval_initialized = 1;
+    }
+}
+
+#endif
diff --git a/src/grep/lib/msvc-inval.h b/src/grep/lib/msvc-inval.h
new file mode 100644
index 0000000..e115a35
--- /dev/null
+++ b/src/grep/lib/msvc-inval.h
@@ -0,0 +1,222 @@
+/* Invalid parameter handler for MSVC runtime libraries.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _MSVC_INVAL_H
+#define _MSVC_INVAL_H
+
+/* With MSVC runtime libraries with the "invalid parameter handler" concept,
+   functions like fprintf(), dup2(), or close() crash when the caller passes
+   an invalid argument.  But POSIX wants error codes (such as EINVAL or EBADF)
+   instead.
+   This file defines macros that turn such an invalid parameter notification
+   into a non-local exit.  An error code can then be produced at the target
+   of this exit.  You can thus write code like
+
+     TRY_MSVC_INVAL
+       {
+         <Code that can trigger an invalid parameter notification
+          but does not do 'return', 'break', 'continue', nor 'goto'.>
+       }
+     CATCH_MSVC_INVAL
+       {
+         <Code that handles an invalid parameter notification
+          but does not do 'return', 'break', 'continue', nor 'goto'.>
+       }
+     DONE_MSVC_INVAL;
+
+   This entire block expands to a single statement.
+
+   The handling of invalid parameters can be done in three ways:
+
+     * The default way, which is reasonable for programs (not libraries):
+       AC_DEFINE([MSVC_INVALID_PARAMETER_HANDLING], [DEFAULT_HANDLING])
+
+     * The way for libraries that make "hairy" calls (like close(-1), or
+       fclose(fp) where fileno(fp) is closed, or simply getdtablesize()):
+       AC_DEFINE([MSVC_INVALID_PARAMETER_HANDLING], [HAIRY_LIBRARY_HANDLING])
+
+     * The way for libraries that make no "hairy" calls:
+       AC_DEFINE([MSVC_INVALID_PARAMETER_HANDLING], [SANE_LIBRARY_HANDLING])
+ */
+
+#define DEFAULT_HANDLING       0
+#define HAIRY_LIBRARY_HANDLING 1
+#define SANE_LIBRARY_HANDLING  2
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
+    && !(MSVC_INVALID_PARAMETER_HANDLING == SANE_LIBRARY_HANDLING)
+/* A native Windows platform with the "invalid parameter handler" concept,
+   and either DEFAULT_HANDLING or HAIRY_LIBRARY_HANDLING.  */
+
+# if MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
+/* Default handling.  */
+
+#  ifdef __cplusplus
+extern "C" {
+#  endif
+
+/* Ensure that the invalid parameter handler in installed that just returns.
+   Because we assume no other part of the program installs a different
+   invalid parameter handler, this solution is multithread-safe.  */
+extern void gl_msvc_inval_ensure_handler (void);
+
+#  ifdef __cplusplus
+}
+#  endif
+
+#  define TRY_MSVC_INVAL \
+     do                                                                        \
+       {                                                                       \
+         gl_msvc_inval_ensure_handler ();                                      \
+         if (1)
+#  define CATCH_MSVC_INVAL \
+         else
+#  define DONE_MSVC_INVAL \
+       }                                                                       \
+     while (0)
+
+# else
+/* Handling for hairy libraries.  */
+
+#  include <excpt.h>
+
+/* Gnulib can define its own status codes, as described in the page
+   "Raising Software Exceptions" on microsoft.com
+   <https://docs.microsoft.com/en-us/cpp/cpp/raising-software-exceptions>.
+   Our status codes are composed of
+     - 0xE0000000, mandatory for all user-defined status codes,
+     - 0x474E550, a API identifier ("GNU"),
+     - 0, 1, 2, ..., used to distinguish different status codes from the
+       same API.  */
+#  define STATUS_GNULIB_INVALID_PARAMETER (0xE0000000 + 0x474E550 + 0)
+
+#  if defined _MSC_VER
+/* A compiler that supports __try/__except, as described in the page
+   "try-except statement" on microsoft.com
+   <https://docs.microsoft.com/en-us/cpp/cpp/try-except-statement>.
+   With __try/__except, we can use the multithread-safe exception handling.  */
+
+#   ifdef __cplusplus
+extern "C" {
+#   endif
+
+/* Ensure that the invalid parameter handler in installed that raises a
+   software exception with code STATUS_GNULIB_INVALID_PARAMETER.
+   Because we assume no other part of the program installs a different
+   invalid parameter handler, this solution is multithread-safe.  */
+extern void gl_msvc_inval_ensure_handler (void);
+
+#   ifdef __cplusplus
+}
+#   endif
+
+#   define TRY_MSVC_INVAL \
+      do                                                                       \
+        {                                                                      \
+          gl_msvc_inval_ensure_handler ();                                     \
+          __try
+#   define CATCH_MSVC_INVAL \
+          __except (GetExceptionCode () == STATUS_GNULIB_INVALID_PARAMETER     \
+                    ? EXCEPTION_EXECUTE_HANDLER                                \
+                    : EXCEPTION_CONTINUE_SEARCH)
+#   define DONE_MSVC_INVAL \
+        }                                                                      \
+      while (0)
+
+#  else
+/* Any compiler.
+   We can only use setjmp/longjmp.  */
+
+#   include <setjmp.h>
+
+#   ifdef __cplusplus
+extern "C" {
+#   endif
+
+struct gl_msvc_inval_per_thread
+{
+  /* The restart that will resume execution at the code between
+     CATCH_MSVC_INVAL and DONE_MSVC_INVAL.  It is enabled only between
+     TRY_MSVC_INVAL and CATCH_MSVC_INVAL.  */
+  jmp_buf restart;
+
+  /* Tells whether the contents of restart is valid.  */
+  int restart_valid;
+};
+
+/* Ensure that the invalid parameter handler in installed that passes
+   control to the gl_msvc_inval_restart if it is valid, or raises a
+   software exception with code STATUS_GNULIB_INVALID_PARAMETER otherwise.
+   Because we assume no other part of the program installs a different
+   invalid parameter handler, this solution is multithread-safe.  */
+extern void gl_msvc_inval_ensure_handler (void);
+
+/* Return a pointer to the per-thread data for the current thread.  */
+extern struct gl_msvc_inval_per_thread *gl_msvc_inval_current (void);
+
+#   ifdef __cplusplus
+}
+#   endif
+
+#   define TRY_MSVC_INVAL \
+      do                                                                       \
+        {                                                                      \
+          struct gl_msvc_inval_per_thread *msvc_inval_current;                 \
+          gl_msvc_inval_ensure_handler ();                                     \
+          msvc_inval_current = gl_msvc_inval_current ();                       \
+          /* First, initialize gl_msvc_inval_restart.  */                      \
+          if (setjmp (msvc_inval_current->restart) == 0)                       \
+            {                                                                  \
+              /* Then, mark it as valid.  */                                   \
+              msvc_inval_current->restart_valid = 1;
+#   define CATCH_MSVC_INVAL \
+              /* Execution completed.                                          \
+                 Mark gl_msvc_inval_restart as invalid.  */                    \
+              msvc_inval_current->restart_valid = 0;                           \
+            }                                                                  \
+          else                                                                 \
+            {                                                                  \
+              /* Execution triggered an invalid parameter notification.        \
+                 Mark gl_msvc_inval_restart as invalid.  */                    \
+              msvc_inval_current->restart_valid = 0;
+#   define DONE_MSVC_INVAL \
+            }                                                                  \
+        }                                                                      \
+      while (0)
+
+#  endif
+
+# endif
+
+#else
+/* A platform that does not need to the invalid parameter handler,
+   or when SANE_LIBRARY_HANDLING is desired.  */
+
+/* The braces here avoid GCC warnings like
+   "warning: suggest explicit braces to avoid ambiguous 'else'".  */
+# define TRY_MSVC_INVAL \
+    do                                                                         \
+      {                                                                        \
+        if (1)
+# define CATCH_MSVC_INVAL \
+        else
+# define DONE_MSVC_INVAL \
+      }                                                                        \
+    while (0)
+
+#endif
+
+#endif /* _MSVC_INVAL_H */
diff --git a/src/grep/lib/msvc-nothrow.c b/src/grep/lib/msvc-nothrow.c
new file mode 100644
index 0000000..d3c1f54
--- /dev/null
+++ b/src/grep/lib/msvc-nothrow.c
@@ -0,0 +1,51 @@
+/* Wrappers that don't throw invalid parameter notifications
+   with MSVC runtime libraries.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "msvc-nothrow.h"
+
+/* Get declarations of the native Windows API functions.  */
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+# include "msvc-inval.h"
+#endif
+
+#undef _get_osfhandle
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+intptr_t
+_gl_nothrow_get_osfhandle (int fd)
+{
+  intptr_t result;
+
+  TRY_MSVC_INVAL
+    {
+      result = _get_osfhandle (fd);
+    }
+  CATCH_MSVC_INVAL
+    {
+      result = (intptr_t) INVALID_HANDLE_VALUE;
+    }
+  DONE_MSVC_INVAL;
+
+  return result;
+}
+#endif
diff --git a/src/grep/lib/msvc-nothrow.h b/src/grep/lib/msvc-nothrow.h
new file mode 100644
index 0000000..057b5dd
--- /dev/null
+++ b/src/grep/lib/msvc-nothrow.h
@@ -0,0 +1,43 @@
+/* Wrappers that don't throw invalid parameter notifications
+   with MSVC runtime libraries.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _MSVC_NOTHROW_H
+#define _MSVC_NOTHROW_H
+
+/* With MSVC runtime libraries with the "invalid parameter handler" concept,
+   functions like fprintf(), dup2(), or close() crash when the caller passes
+   an invalid argument.  But POSIX wants error codes (such as EINVAL or EBADF)
+   instead.
+   This file defines wrappers that turn such an invalid parameter notification
+   into an error code.  */
+
+#if defined _WIN32 && ! defined __CYGWIN__
+
+/* Get original declaration of _get_osfhandle.  */
+# include <io.h>
+
+# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+
+/* Override _get_osfhandle.  */
+extern intptr_t _gl_nothrow_get_osfhandle (int fd);
+#  define _get_osfhandle _gl_nothrow_get_osfhandle
+
+# endif
+
+#endif
+
+#endif /* _MSVC_NOTHROW_H */
diff --git a/src/grep/lib/nl_langinfo-lock.c b/src/grep/lib/nl_langinfo-lock.c
new file mode 100644
index 0000000..fcdf56d
--- /dev/null
+++ b/src/grep/lib/nl_langinfo-lock.c
@@ -0,0 +1,150 @@
+/* Return the internal lock used by nl_langinfo.
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019-2020.  */
+
+#include <config.h>
+
+/* When it is known that the gl_get_nl_langinfo_lock function is defined
+   by a dependency library, it should not be defined here.  */
+#if OMIT_NL_LANGINFO_LOCK
+
+/* This declaration is solely to ensure that after preprocessing
+   this file is never empty.  */
+typedef int dummy;
+
+#else
+
+/* This file defines the internal lock used by nl_langinfo.
+   It is a separate compilation unit, so that only one copy of it is
+   present when linking statically.  */
+
+/* Prohibit renaming this symbol.  */
+# undef gl_get_nl_langinfo_lock
+
+/* Macro for exporting a symbol (function, not variable) defined in this file,
+   when compiled into a shared library.  */
+# ifndef DLL_EXPORTED
+#  if HAVE_VISIBILITY
+  /* Override the effect of the compiler option '-fvisibility=hidden'.  */
+#   define DLL_EXPORTED __attribute__((__visibility__("default")))
+#  elif defined _WIN32 || defined __CYGWIN__
+#   define DLL_EXPORTED __declspec(dllexport)
+#  else
+#   define DLL_EXPORTED
+#  endif
+# endif
+
+# if defined _WIN32 && !defined __CYGWIN__
+
+#  define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#  include <windows.h>
+
+#  include "windows-initguard.h"
+
+/* The return type is a 'CRITICAL_SECTION *', not a 'glwthread_mutex_t *',
+   because the latter is not guaranteed to be a stable ABI in the future.  */
+
+/* Make sure the function gets exported from DLLs.  */
+DLL_EXPORTED CRITICAL_SECTION *gl_get_nl_langinfo_lock (void);
+
+static glwthread_initguard_t guard = GLWTHREAD_INITGUARD_INIT;
+static CRITICAL_SECTION lock;
+
+/* Returns the internal lock used by nl_langinfo.  */
+CRITICAL_SECTION *
+gl_get_nl_langinfo_lock (void)
+{
+  if (!guard.done)
+    {
+      if (InterlockedIncrement (&guard.started) == 0)
+        {
+          /* This thread is the first one to need the lock.  Initialize it.  */
+          InitializeCriticalSection (&lock);
+          guard.done = 1;
+        }
+      else
+        {
+          /* Don't let guard.started grow and wrap around.  */
+          InterlockedDecrement (&guard.started);
+          /* Yield the CPU while waiting for another thread to finish
+             initializing this mutex.  */
+          while (!guard.done)
+            Sleep (0);
+        }
+    }
+  return &lock;
+}
+
+# elif HAVE_PTHREAD_API
+
+#  include <pthread.h>
+
+static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+
+/* Make sure the function gets exported from shared libraries.  */
+DLL_EXPORTED pthread_mutex_t *gl_get_nl_langinfo_lock (void);
+
+/* Returns the internal lock used by nl_langinfo.  */
+pthread_mutex_t *
+gl_get_nl_langinfo_lock (void)
+{
+  return &mutex;
+}
+
+# elif HAVE_THREADS_H
+
+#  include <threads.h>
+#  include <stdlib.h>
+
+static int volatile init_needed = 1;
+static once_flag init_once = ONCE_FLAG_INIT;
+static mtx_t mutex;
+
+static void
+atomic_init (void)
+{
+  if (mtx_init (&mutex, mtx_plain) != thrd_success)
+    abort ();
+  init_needed = 0;
+}
+
+/* Make sure the function gets exported from shared libraries.  */
+DLL_EXPORTED mtx_t *gl_get_nl_langinfo_lock (void);
+
+/* Returns the internal lock used by nl_langinfo.  */
+mtx_t *
+gl_get_nl_langinfo_lock (void)
+{
+  if (init_needed)
+    call_once (&init_once, atomic_init);
+  return &mutex;
+}
+
+# endif
+
+# if (defined _WIN32 || defined __CYGWIN__) && !defined _MSC_VER
+/* Make sure the '__declspec(dllimport)' in nl_langinfo.c does not cause
+   a link failure when no DLLs are involved.  */
+#  if defined _WIN64 || defined _LP64
+#   define IMP(x) __imp_##x
+#  else
+#   define IMP(x) _imp__##x
+#  endif
+void * IMP(gl_get_nl_langinfo_lock) = &gl_get_nl_langinfo_lock;
+# endif
+
+#endif
diff --git a/src/grep/lib/nl_langinfo.c b/src/grep/lib/nl_langinfo.c
new file mode 100644
index 0000000..b481f20
--- /dev/null
+++ b/src/grep/lib/nl_langinfo.c
@@ -0,0 +1,572 @@
+/* nl_langinfo() replacement: query locale dependent information.
+
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <langinfo.h>
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#if defined _WIN32 && ! defined __CYGWIN__
+# define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+# include <windows.h>
+# include <stdio.h>
+#endif
+
+#if REPLACE_NL_LANGINFO && !NL_LANGINFO_MTSAFE
+# if defined _WIN32 && !defined __CYGWIN__
+
+#  define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#  include <windows.h>
+
+# elif HAVE_PTHREAD_API
+
+#  include <pthread.h>
+#  if HAVE_THREADS_H && HAVE_WEAK_SYMBOLS
+#   include <threads.h>
+#   pragma weak thrd_exit
+#   define c11_threads_in_use() (thrd_exit != NULL)
+#  else
+#   define c11_threads_in_use() 0
+#  endif
+
+# elif HAVE_THREADS_H
+
+#  include <threads.h>
+
+# endif
+#endif
+
+/* nl_langinfo() must be multithread-safe.  To achieve this without using
+   thread-local storage:
+     1. We use a specific static buffer for each possible argument.
+        So that different threads can call nl_langinfo with different arguments,
+        without interfering.
+     2. We use a simple strcpy or memcpy to fill this static buffer.  Filling it
+        through, for example, strcpy + strcat would not be guaranteed to leave
+        the buffer's contents intact if another thread is currently accessing
+        it.  If necessary, the contents is first assembled in a stack-allocated
+        buffer.  */
+
+#if !REPLACE_NL_LANGINFO || GNULIB_defined_CODESET
+/* Return the codeset of the current locale, if this is easily deducible.
+   Otherwise, return "".  */
+static char *
+ctype_codeset (void)
+{
+  static char result[2 + 10 + 1];
+  char buf[2 + 10 + 1];
+  char locale[SETLOCALE_NULL_MAX];
+  char *codeset;
+  size_t codesetlen;
+
+  if (setlocale_null_r (LC_CTYPE, locale, sizeof (locale)))
+    locale[0] = '\0';
+
+  codeset = buf;
+  codeset[0] = '\0';
+
+  if (locale[0])
+    {
+      /* If the locale name contains an encoding after the dot, return it.  */
+      char *dot = strchr (locale, '.');
+
+      if (dot)
+        {
+          /* Look for the possible @... trailer and remove it, if any.  */
+          char *codeset_start = dot + 1;
+          char const *modifier = strchr (codeset_start, '@');
+
+          if (! modifier)
+            codeset = codeset_start;
+          else
+            {
+              codesetlen = modifier - codeset_start;
+              if (codesetlen < sizeof buf)
+                {
+                  codeset = memcpy (buf, codeset_start, codesetlen);
+                  codeset[codesetlen] = '\0';
+                }
+            }
+        }
+    }
+
+# if defined _WIN32 && ! defined __CYGWIN__
+  /* If setlocale is successful, it returns the number of the
+     codepage, as a string.  Otherwise, fall back on Windows API
+     GetACP, which returns the locale's codepage as a number (although
+     this doesn't change according to what the 'setlocale' call specified).
+     Either way, prepend "CP" to make it a valid codeset name.  */
+  codesetlen = strlen (codeset);
+  if (0 < codesetlen && codesetlen < sizeof buf - 2)
+    memmove (buf + 2, codeset, codesetlen + 1);
+  else
+    sprintf (buf + 2, "%u", GetACP ());
+  /* For a locale name such as "French_France.65001", in Windows 10,
+     setlocale now returns "French_France.utf8" instead.  */
+  if (strcmp (buf + 2, "65001") == 0 || strcmp (buf + 2, "utf8") == 0)
+    return (char *) "UTF-8";
+  else
+    {
+      memcpy (buf, "CP", 2);
+      strcpy (result, buf);
+      return result;
+    }
+# else
+  strcpy (result, codeset);
+  return result;
+#endif
+}
+#endif
+
+
+#if REPLACE_NL_LANGINFO
+
+/* Override nl_langinfo with support for added nl_item values.  */
+
+# undef nl_langinfo
+
+/* Without locking, on Solaris 11.3, test-nl_langinfo-mt fails, with message
+   "thread5 disturbed by threadN!", even when threadN invokes only
+      nl_langinfo (CODESET);
+      nl_langinfo (CRNCYSTR);
+   Similarly on Solaris 10.  */
+
+# if !NL_LANGINFO_MTSAFE /* Solaris */
+
+#  define ITEMS (MAXSTRMSG + 1)
+#  define MAX_RESULT_LEN 80
+
+static char *
+nl_langinfo_unlocked (nl_item item)
+{
+  static char result[ITEMS][MAX_RESULT_LEN];
+
+  /* The result of nl_langinfo is in storage that can be overwritten by
+     other calls to nl_langinfo.  */
+  char *tmp = nl_langinfo (item);
+  if (item >= 0 && item < ITEMS && tmp != NULL)
+    {
+      size_t tmp_len = strlen (tmp);
+      if (tmp_len < MAX_RESULT_LEN)
+        strcpy (result[item], tmp);
+      else
+        {
+          /* Produce a truncated result.  Oh well...  */
+          result[item][MAX_RESULT_LEN - 1] = '\0';
+          memcpy (result[item], tmp, MAX_RESULT_LEN - 1);
+        }
+      return result[item];
+    }
+  else
+    return tmp;
+}
+
+/* Use a lock, so that no two threads can invoke nl_langinfo_unlocked
+   at the same time.  */
+
+/* Prohibit renaming this symbol.  */
+#  undef gl_get_nl_langinfo_lock
+
+#  if defined _WIN32 && !defined __CYGWIN__
+
+extern __declspec(dllimport) CRITICAL_SECTION *gl_get_nl_langinfo_lock (void);
+
+static char *
+nl_langinfo_with_lock (nl_item item)
+{
+  CRITICAL_SECTION *lock = gl_get_nl_langinfo_lock ();
+  char *ret;
+
+  EnterCriticalSection (lock);
+  ret = nl_langinfo_unlocked (item);
+  LeaveCriticalSection (lock);
+
+  return ret;
+}
+
+#  elif HAVE_PTHREAD_API
+
+extern
+#   if defined _WIN32 || defined __CYGWIN__
+  __declspec(dllimport)
+#   endif
+  pthread_mutex_t *gl_get_nl_langinfo_lock (void);
+
+#   if HAVE_WEAK_SYMBOLS /* musl libc, FreeBSD, NetBSD, OpenBSD, Haiku */
+
+     /* Avoid the need to link with '-lpthread'.  */
+#    pragma weak pthread_mutex_lock
+#    pragma weak pthread_mutex_unlock
+
+     /* Determine whether libpthread is in use.  */
+#    pragma weak pthread_mutexattr_gettype
+     /* See the comments in lock.h.  */
+#    define pthread_in_use() \
+       (pthread_mutexattr_gettype != NULL || c11_threads_in_use ())
+
+#   else
+#    define pthread_in_use() 1
+#   endif
+
+static char *
+nl_langinfo_with_lock (nl_item item)
+{
+  if (pthread_in_use())
+    {
+      pthread_mutex_t *lock = gl_get_nl_langinfo_lock ();
+      char *ret;
+
+      if (pthread_mutex_lock (lock))
+        abort ();
+      ret = nl_langinfo_unlocked (item);
+      if (pthread_mutex_unlock (lock))
+        abort ();
+
+      return ret;
+    }
+  else
+    return nl_langinfo_unlocked (item);
+}
+
+#  elif HAVE_THREADS_H
+
+extern mtx_t *gl_get_nl_langinfo_lock (void);
+
+static char *
+nl_langinfo_with_lock (nl_item item)
+{
+  mtx_t *lock = gl_get_nl_langinfo_lock ();
+  char *ret;
+
+  if (mtx_lock (lock) != thrd_success)
+    abort ();
+  ret = nl_langinfo_unlocked (item);
+  if (mtx_unlock (lock) != thrd_success)
+    abort ();
+
+  return ret;
+}
+
+#  endif
+
+# else
+
+/* On other platforms, no lock is needed.  */
+#  define nl_langinfo_with_lock nl_langinfo
+
+# endif
+
+char *
+rpl_nl_langinfo (nl_item item)
+{
+  switch (item)
+    {
+# if GNULIB_defined_CODESET
+    case CODESET:
+      return ctype_codeset ();
+# endif
+# if GNULIB_defined_T_FMT_AMPM
+    case T_FMT_AMPM:
+      return (char *) "%I:%M:%S %p";
+# endif
+# if GNULIB_defined_ALTMON
+    case ALTMON_1:
+    case ALTMON_2:
+    case ALTMON_3:
+    case ALTMON_4:
+    case ALTMON_5:
+    case ALTMON_6:
+    case ALTMON_7:
+    case ALTMON_8:
+    case ALTMON_9:
+    case ALTMON_10:
+    case ALTMON_11:
+    case ALTMON_12:
+      /* We don't ship the appropriate localizations with gnulib.  Therefore,
+         treat ALTMON_i like MON_i.  */
+      item = item - ALTMON_1 + MON_1;
+      break;
+# endif
+# if GNULIB_defined_ERA
+    case ERA:
+      /* The format is not standardized.  In glibc it is a sequence of strings
+         of the form "direction:offset:start_date:end_date:era_name:era_format"
+         with an empty string at the end.  */
+      return (char *) "";
+    case ERA_D_FMT:
+      /* The %Ex conversion in strftime behaves like %x if the locale does not
+         have an alternative time format.  */
+      item = D_FMT;
+      break;
+    case ERA_D_T_FMT:
+      /* The %Ec conversion in strftime behaves like %c if the locale does not
+         have an alternative time format.  */
+      item = D_T_FMT;
+      break;
+    case ERA_T_FMT:
+      /* The %EX conversion in strftime behaves like %X if the locale does not
+         have an alternative time format.  */
+      item = T_FMT;
+      break;
+    case ALT_DIGITS:
+      /* The format is not standardized.  In glibc it is a sequence of 10
+         strings, appended in memory.  */
+      return (char *) "\0\0\0\0\0\0\0\0\0\0";
+# endif
+# if GNULIB_defined_YESEXPR || !FUNC_NL_LANGINFO_YESEXPR_WORKS
+    case YESEXPR:
+      return (char *) "^[yY]";
+    case NOEXPR:
+      return (char *) "^[nN]";
+# endif
+    default:
+      break;
+    }
+  return nl_langinfo_with_lock (item);
+}
+
+#else
+
+/* Provide nl_langinfo from scratch, either for native MS-Windows, or
+   for old Unix platforms without locales, such as Linux libc5 or
+   BeOS.  */
+
+# include <time.h>
+
+char *
+nl_langinfo (nl_item item)
+{
+  char buf[100];
+  struct tm tmm = { 0 };
+
+  switch (item)
+    {
+    /* nl_langinfo items of the LC_CTYPE category */
+    case CODESET:
+      {
+        char *codeset = ctype_codeset ();
+        if (*codeset)
+          return codeset;
+      }
+# ifdef __BEOS__
+      return (char *) "UTF-8";
+# else
+      return (char *) "ISO-8859-1";
+# endif
+    /* nl_langinfo items of the LC_NUMERIC category */
+    case RADIXCHAR:
+      return localeconv () ->decimal_point;
+    case THOUSEP:
+      return localeconv () ->thousands_sep;
+# ifdef GROUPING
+    case GROUPING:
+      return localeconv () ->grouping;
+# endif
+    /* nl_langinfo items of the LC_TIME category.
+       TODO: Really use the locale.  */
+    case D_T_FMT:
+    case ERA_D_T_FMT:
+      return (char *) "%a %b %e %H:%M:%S %Y";
+    case D_FMT:
+    case ERA_D_FMT:
+      return (char *) "%m/%d/%y";
+    case T_FMT:
+    case ERA_T_FMT:
+      return (char *) "%H:%M:%S";
+    case T_FMT_AMPM:
+      return (char *) "%I:%M:%S %p";
+    case AM_STR:
+      {
+        static char result[80];
+        if (!strftime (buf, sizeof result, "%p", &tmm))
+          return (char *) "AM";
+        strcpy (result, buf);
+        return result;
+      }
+    case PM_STR:
+      {
+        static char result[80];
+        tmm.tm_hour = 12;
+        if (!strftime (buf, sizeof result, "%p", &tmm))
+          return (char *) "PM";
+        strcpy (result, buf);
+        return result;
+      }
+    case DAY_1:
+    case DAY_2:
+    case DAY_3:
+    case DAY_4:
+    case DAY_5:
+    case DAY_6:
+    case DAY_7:
+      {
+        static char result[7][50];
+        static char const days[][sizeof "Wednesday"] = {
+          "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday",
+          "Friday", "Saturday"
+        };
+        tmm.tm_wday = item - DAY_1;
+        if (!strftime (buf, sizeof result[0], "%A", &tmm))
+          return (char *) days[item - DAY_1];
+        strcpy (result[item - DAY_1], buf);
+        return result[item - DAY_1];
+      }
+    case ABDAY_1:
+    case ABDAY_2:
+    case ABDAY_3:
+    case ABDAY_4:
+    case ABDAY_5:
+    case ABDAY_6:
+    case ABDAY_7:
+      {
+        static char result[7][30];
+        static char const abdays[][sizeof "Sun"] = {
+          "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
+        };
+        tmm.tm_wday = item - ABDAY_1;
+        if (!strftime (buf, sizeof result[0], "%a", &tmm))
+          return (char *) abdays[item - ABDAY_1];
+        strcpy (result[item - ABDAY_1], buf);
+        return result[item - ABDAY_1];
+      }
+    {
+      static char const months[][sizeof "September"] = {
+        "January", "February", "March", "April", "May", "June", "July",
+        "September", "October", "November", "December"
+      };
+      case MON_1:
+      case MON_2:
+      case MON_3:
+      case MON_4:
+      case MON_5:
+      case MON_6:
+      case MON_7:
+      case MON_8:
+      case MON_9:
+      case MON_10:
+      case MON_11:
+      case MON_12:
+        {
+          static char result[12][50];
+          tmm.tm_mon = item - MON_1;
+          if (!strftime (buf, sizeof result[0], "%B", &tmm))
+            return (char *) months[item - MON_1];
+          strcpy (result[item - MON_1], buf);
+          return result[item - MON_1];
+        }
+      case ALTMON_1:
+      case ALTMON_2:
+      case ALTMON_3:
+      case ALTMON_4:
+      case ALTMON_5:
+      case ALTMON_6:
+      case ALTMON_7:
+      case ALTMON_8:
+      case ALTMON_9:
+      case ALTMON_10:
+      case ALTMON_11:
+      case ALTMON_12:
+        {
+          static char result[12][50];
+          tmm.tm_mon = item - ALTMON_1;
+          /* The platforms without nl_langinfo() don't support strftime with
+             %OB.  We don't even need to try.  */
+          #if 0
+          if (!strftime (buf, sizeof result[0], "%OB", &tmm))
+          #endif
+            if (!strftime (buf, sizeof result[0], "%B", &tmm))
+              return (char *) months[item - ALTMON_1];
+          strcpy (result[item - ALTMON_1], buf);
+          return result[item - ALTMON_1];
+        }
+    }
+    case ABMON_1:
+    case ABMON_2:
+    case ABMON_3:
+    case ABMON_4:
+    case ABMON_5:
+    case ABMON_6:
+    case ABMON_7:
+    case ABMON_8:
+    case ABMON_9:
+    case ABMON_10:
+    case ABMON_11:
+    case ABMON_12:
+      {
+        static char result[12][30];
+        static char const abmonths[][sizeof "Jan"] = {
+          "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul",
+          "Sep", "Oct", "Nov", "Dec"
+        };
+        tmm.tm_mon = item - ABMON_1;
+        if (!strftime (buf, sizeof result[0], "%b", &tmm))
+          return (char *) abmonths[item - ABMON_1];
+        strcpy (result[item - ABMON_1], buf);
+        return result[item - ABMON_1];
+      }
+    case ERA:
+      return (char *) "";
+    case ALT_DIGITS:
+      return (char *) "\0\0\0\0\0\0\0\0\0\0";
+    /* nl_langinfo items of the LC_MONETARY category.  */
+    case CRNCYSTR:
+      return localeconv () ->currency_symbol;
+# ifdef INT_CURR_SYMBOL
+    case INT_CURR_SYMBOL:
+      return localeconv () ->int_curr_symbol;
+    case MON_DECIMAL_POINT:
+      return localeconv () ->mon_decimal_point;
+    case MON_THOUSANDS_SEP:
+      return localeconv () ->mon_thousands_sep;
+    case MON_GROUPING:
+      return localeconv () ->mon_grouping;
+    case POSITIVE_SIGN:
+      return localeconv () ->positive_sign;
+    case NEGATIVE_SIGN:
+      return localeconv () ->negative_sign;
+    case FRAC_DIGITS:
+      return & localeconv () ->frac_digits;
+    case INT_FRAC_DIGITS:
+      return & localeconv () ->int_frac_digits;
+    case P_CS_PRECEDES:
+      return & localeconv () ->p_cs_precedes;
+    case N_CS_PRECEDES:
+      return & localeconv () ->n_cs_precedes;
+    case P_SEP_BY_SPACE:
+      return & localeconv () ->p_sep_by_space;
+    case N_SEP_BY_SPACE:
+      return & localeconv () ->n_sep_by_space;
+    case P_SIGN_POSN:
+      return & localeconv () ->p_sign_posn;
+    case N_SIGN_POSN:
+      return & localeconv () ->n_sign_posn;
+# endif
+    /* nl_langinfo items of the LC_MESSAGES category
+       TODO: Really use the locale. */
+    case YESEXPR:
+      return (char *) "^[yY]";
+    case NOEXPR:
+      return (char *) "^[nN]";
+    default:
+      return (char *) "";
+    }
+}
+
+#endif
diff --git a/src/grep/lib/obstack.c b/src/grep/lib/obstack.c
new file mode 100644
index 0000000..3017b58
--- /dev/null
+++ b/src/grep/lib/obstack.c
@@ -0,0 +1,353 @@
+/* obstack.c - subroutines used implicitly by object stack macros
+   Copyright (C) 1988-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+
+#ifdef _LIBC
+# include <obstack.h>
+#else
+# include <config.h>
+# include "obstack.h"
+#endif
+
+/* NOTE BEFORE MODIFYING THIS FILE: _OBSTACK_INTERFACE_VERSION in
+   obstack.h must be incremented whenever callers compiled using an old
+   obstack.h can no longer properly call the functions in this file.  */
+
+/* Comment out all this code if we are using the GNU C Library, and are not
+   actually compiling the library itself, and the installed library
+   supports the same library interface we do.  This code is part of the GNU
+   C Library, but also included in many other GNU distributions.  Compiling
+   and linking in this code is a waste when using the GNU C library
+   (especially if it is a shared library).  Rather than having every GNU
+   program understand 'configure --with-gnu-libc' and omit the object
+   files, it is simpler to just do this in the source for each such file.  */
+#if !defined _LIBC && defined __GNU_LIBRARY__ && __GNU_LIBRARY__ > 1
+# include <gnu-versions.h>
+# if (_GNU_OBSTACK_INTERFACE_VERSION == _OBSTACK_INTERFACE_VERSION	      \
+      || (_GNU_OBSTACK_INTERFACE_VERSION == 1				      \
+          && _OBSTACK_INTERFACE_VERSION == 2				      \
+          && defined SIZEOF_INT && defined SIZEOF_SIZE_T		      \
+          && SIZEOF_INT == SIZEOF_SIZE_T))
+#  define _OBSTACK_ELIDE_CODE
+# endif
+#endif
+
+#ifndef _OBSTACK_ELIDE_CODE
+/* If GCC, or if an oddball (testing?) host that #defines __alignof__,
+   use the already-supplied __alignof__.  Otherwise, this must be Gnulib
+   (as glibc assumes GCC); defer to Gnulib's alignof_type.  */
+# if !defined __GNUC__ && !defined __alignof__
+#  include <alignof.h>
+#  define __alignof__(type) alignof_type (type)
+# endif
+# include <stdlib.h>
+# include <stdint.h>
+
+# ifndef MAX
+#  define MAX(a,b) ((a) > (b) ? (a) : (b))
+# endif
+
+/* Determine default alignment.  */
+
+/* If malloc were really smart, it would round addresses to DEFAULT_ALIGNMENT.
+   But in fact it might be less smart and round addresses to as much as
+   DEFAULT_ROUNDING.  So we prepare for it to do that.
+
+   DEFAULT_ALIGNMENT cannot be an enum constant; see gnulib's alignof.h.  */
+#define DEFAULT_ALIGNMENT MAX (__alignof__ (long double),		      \
+                               MAX (__alignof__ (uintmax_t),		      \
+                                    __alignof__ (void *)))
+#define DEFAULT_ROUNDING MAX (sizeof (long double),			      \
+                               MAX (sizeof (uintmax_t),			      \
+                                    sizeof (void *)))
+
+/* Call functions with either the traditional malloc/free calling
+   interface, or the mmalloc/mfree interface (that adds an extra first
+   argument), based on the value of use_extra_arg.  */
+
+static void *
+call_chunkfun (struct obstack *h, size_t size)
+{
+  if (h->use_extra_arg)
+    return h->chunkfun.extra (h->extra_arg, size);
+  else
+    return h->chunkfun.plain (size);
+}
+
+static void
+call_freefun (struct obstack *h, void *old_chunk)
+{
+  if (h->use_extra_arg)
+    h->freefun.extra (h->extra_arg, old_chunk);
+  else
+    h->freefun.plain (old_chunk);
+}
+
+
+/* Initialize an obstack H for use.  Specify chunk size SIZE (0 means default).
+   Objects start on multiples of ALIGNMENT (0 means use default).
+
+   Return nonzero if successful, calls obstack_alloc_failed_handler if
+   allocation fails.  */
+
+static int
+_obstack_begin_worker (struct obstack *h,
+                       _OBSTACK_SIZE_T size, _OBSTACK_SIZE_T alignment)
+{
+  struct _obstack_chunk *chunk; /* points to new chunk */
+
+  if (alignment == 0)
+    alignment = DEFAULT_ALIGNMENT;
+  if (size == 0)
+    /* Default size is what GNU malloc can fit in a 4096-byte block.  */
+    {
+      /* 12 is sizeof (mhead) and 4 is EXTRA from GNU malloc.
+         Use the values for range checking, because if range checking is off,
+         the extra bytes won't be missed terribly, but if range checking is on
+         and we used a larger request, a whole extra 4096 bytes would be
+         allocated.
+
+         These number are irrelevant to the new GNU malloc.  I suspect it is
+         less sensitive to the size of the request.  */
+      int extra = ((((12 + DEFAULT_ROUNDING - 1) & ~(DEFAULT_ROUNDING - 1))
+                    + 4 + DEFAULT_ROUNDING - 1)
+                   & ~(DEFAULT_ROUNDING - 1));
+      size = 4096 - extra;
+    }
+
+  h->chunk_size = size;
+  h->alignment_mask = alignment - 1;
+
+  chunk = h->chunk = call_chunkfun (h, h->chunk_size);
+  if (!chunk)
+    (*obstack_alloc_failed_handler) ();
+  h->next_free = h->object_base = __PTR_ALIGN ((char *) chunk, chunk->contents,
+                                               alignment - 1);
+  h->chunk_limit = chunk->limit = (char *) chunk + h->chunk_size;
+  chunk->prev = 0;
+  /* The initial chunk now contains no empty object.  */
+  h->maybe_empty_object = 0;
+  h->alloc_failed = 0;
+  return 1;
+}
+
+int
+_obstack_begin (struct obstack *h,
+                _OBSTACK_SIZE_T size, _OBSTACK_SIZE_T alignment,
+                void *(*chunkfun) (size_t),
+                void (*freefun) (void *))
+{
+  h->chunkfun.plain = chunkfun;
+  h->freefun.plain = freefun;
+  h->use_extra_arg = 0;
+  return _obstack_begin_worker (h, size, alignment);
+}
+
+int
+_obstack_begin_1 (struct obstack *h,
+                  _OBSTACK_SIZE_T size, _OBSTACK_SIZE_T alignment,
+                  void *(*chunkfun) (void *, size_t),
+                  void (*freefun) (void *, void *),
+                  void *arg)
+{
+  h->chunkfun.extra = chunkfun;
+  h->freefun.extra = freefun;
+  h->extra_arg = arg;
+  h->use_extra_arg = 1;
+  return _obstack_begin_worker (h, size, alignment);
+}
+
+/* Allocate a new current chunk for the obstack *H
+   on the assumption that LENGTH bytes need to be added
+   to the current object, or a new object of length LENGTH allocated.
+   Copies any partial object from the end of the old chunk
+   to the beginning of the new one.  */
+
+void
+_obstack_newchunk (struct obstack *h, _OBSTACK_SIZE_T length)
+{
+  struct _obstack_chunk *old_chunk = h->chunk;
+  struct _obstack_chunk *new_chunk = 0;
+  size_t obj_size = h->next_free - h->object_base;
+  char *object_base;
+
+  /* Compute size for new chunk.  */
+  size_t sum1 = obj_size + length;
+  size_t sum2 = sum1 + h->alignment_mask;
+  size_t new_size = sum2 + (obj_size >> 3) + 100;
+  if (new_size < sum2)
+    new_size = sum2;
+  if (new_size < h->chunk_size)
+    new_size = h->chunk_size;
+
+  /* Allocate and initialize the new chunk.  */
+  if (obj_size <= sum1 && sum1 <= sum2)
+    new_chunk = call_chunkfun (h, new_size);
+  if (!new_chunk)
+    (*obstack_alloc_failed_handler)();
+  h->chunk = new_chunk;
+  new_chunk->prev = old_chunk;
+  new_chunk->limit = h->chunk_limit = (char *) new_chunk + new_size;
+
+  /* Compute an aligned object_base in the new chunk */
+  object_base =
+    __PTR_ALIGN ((char *) new_chunk, new_chunk->contents, h->alignment_mask);
+
+  /* Move the existing object to the new chunk.  */
+  memcpy (object_base, h->object_base, obj_size);
+
+  /* If the object just copied was the only data in OLD_CHUNK,
+     free that chunk and remove it from the chain.
+     But not if that chunk might contain an empty object.  */
+  if (!h->maybe_empty_object
+      && (h->object_base
+          == __PTR_ALIGN ((char *) old_chunk, old_chunk->contents,
+                          h->alignment_mask)))
+    {
+      new_chunk->prev = old_chunk->prev;
+      call_freefun (h, old_chunk);
+    }
+
+  h->object_base = object_base;
+  h->next_free = h->object_base + obj_size;
+  /* The new chunk certainly contains no empty object yet.  */
+  h->maybe_empty_object = 0;
+}
+
+/* Return nonzero if object OBJ has been allocated from obstack H.
+   This is here for debugging.
+   If you use it in a program, you are probably losing.  */
+
+/* Suppress -Wmissing-prototypes warning.  We don't want to declare this in
+   obstack.h because it is just for debugging.  */
+int _obstack_allocated_p (struct obstack *h, void *obj) __attribute_pure__;
+
+int
+_obstack_allocated_p (struct obstack *h, void *obj)
+{
+  struct _obstack_chunk *lp;    /* below addr of any objects in this chunk */
+  struct _obstack_chunk *plp;   /* point to previous chunk if any */
+
+  lp = (h)->chunk;
+  /* We use >= rather than > since the object cannot be exactly at
+     the beginning of the chunk but might be an empty object exactly
+     at the end of an adjacent chunk.  */
+  while (lp != 0 && ((void *) lp >= obj || (void *) (lp)->limit < obj))
+    {
+      plp = lp->prev;
+      lp = plp;
+    }
+  return lp != 0;
+}
+
+/* Free objects in obstack H, including OBJ and everything allocate
+   more recently than OBJ.  If OBJ is zero, free everything in H.  */
+
+void
+_obstack_free (struct obstack *h, void *obj)
+{
+  struct _obstack_chunk *lp;    /* below addr of any objects in this chunk */
+  struct _obstack_chunk *plp;   /* point to previous chunk if any */
+
+  lp = h->chunk;
+  /* We use >= because there cannot be an object at the beginning of a chunk.
+     But there can be an empty object at that address
+     at the end of another chunk.  */
+  while (lp != 0 && ((void *) lp >= obj || (void *) (lp)->limit < obj))
+    {
+      plp = lp->prev;
+      call_freefun (h, lp);
+      lp = plp;
+      /* If we switch chunks, we can't tell whether the new current
+         chunk contains an empty object, so assume that it may.  */
+      h->maybe_empty_object = 1;
+    }
+  if (lp)
+    {
+      h->object_base = h->next_free = (char *) (obj);
+      h->chunk_limit = lp->limit;
+      h->chunk = lp;
+    }
+  else if (obj != 0)
+    /* obj is not in any of the chunks! */
+    abort ();
+}
+
+_OBSTACK_SIZE_T
+_obstack_memory_used (struct obstack *h)
+{
+  struct _obstack_chunk *lp;
+  _OBSTACK_SIZE_T nbytes = 0;
+
+  for (lp = h->chunk; lp != 0; lp = lp->prev)
+    {
+      nbytes += lp->limit - (char *) lp;
+    }
+  return nbytes;
+}
+
+# ifndef _OBSTACK_NO_ERROR_HANDLER
+/* Define the error handler.  */
+#  include <stdio.h>
+
+/* Exit value used when 'print_and_abort' is used.  */
+#  ifdef _LIBC
+int obstack_exit_failure = EXIT_FAILURE;
+#  else
+#   include "exitfail.h"
+#   define obstack_exit_failure exit_failure
+#  endif
+
+#  ifdef _LIBC
+#   include <libintl.h>
+#  else
+#   include "gettext.h"
+#  endif
+#  ifndef _
+#   define _(msgid) gettext (msgid)
+#  endif
+
+#  ifdef _LIBC
+#   include <libio/iolibio.h>
+#  endif
+
+static __attribute_noreturn__ void
+print_and_abort (void)
+{
+  /* Don't change any of these strings.  Yes, it would be possible to add
+     the newline to the string and use fputs or so.  But this must not
+     happen because the "memory exhausted" message appears in other places
+     like this and the translation should be reused instead of creating
+     a very similar string which requires a separate translation.  */
+#  ifdef _LIBC
+  (void) __fxprintf (NULL, "%s\n", _("memory exhausted"));
+#  else
+  fprintf (stderr, "%s\n", _("memory exhausted"));
+#  endif
+  exit (obstack_exit_failure);
+}
+
+/* The functions allocating more room by calling 'obstack_chunk_alloc'
+   jump to the handler pointed to by 'obstack_alloc_failed_handler'.
+   This can be set to a user defined function which should either
+   abort gracefully or use longjump - but shouldn't return.  This
+   variable by default points to the internal function
+   'print_and_abort'.  */
+__attribute_noreturn__ void (*obstack_alloc_failed_handler) (void)
+  = print_and_abort;
+# endif /* !_OBSTACK_NO_ERROR_HANDLER */
+#endif /* !_OBSTACK_ELIDE_CODE */
diff --git a/src/grep/lib/obstack.h b/src/grep/lib/obstack.h
new file mode 100644
index 0000000..92aa49f
--- /dev/null
+++ b/src/grep/lib/obstack.h
@@ -0,0 +1,546 @@
+/* obstack.h - object stack macros
+   Copyright (C) 1988-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Summary:
+
+   All the apparent functions defined here are macros. The idea
+   is that you would use these pre-tested macros to solve a
+   very specific set of problems, and they would run fast.
+   Caution: no side-effects in arguments please!! They may be
+   evaluated MANY times!!
+
+   These macros operate a stack of objects.  Each object starts life
+   small, and may grow to maturity.  (Consider building a word syllable
+   by syllable.)  An object can move while it is growing.  Once it has
+   been "finished" it never changes address again.  So the "top of the
+   stack" is typically an immature growing object, while the rest of the
+   stack is of mature, fixed size and fixed address objects.
+
+   These routines grab large chunks of memory, using a function you
+   supply, called 'obstack_chunk_alloc'.  On occasion, they free chunks,
+   by calling 'obstack_chunk_free'.  You must define them and declare
+   them before using any obstack macros.
+
+   Each independent stack is represented by a 'struct obstack'.
+   Each of the obstack macros expects a pointer to such a structure
+   as the first argument.
+
+   One motivation for this package is the problem of growing char strings
+   in symbol tables.  Unless you are "fascist pig with a read-only mind"
+   --Gosper's immortal quote from HAKMEM item 154, out of context--you
+   would not like to put any arbitrary upper limit on the length of your
+   symbols.
+
+   In practice this often means you will build many short symbols and a
+   few long symbols.  At the time you are reading a symbol you don't know
+   how long it is.  One traditional method is to read a symbol into a
+   buffer, realloc()ating the buffer every time you try to read a symbol
+   that is longer than the buffer.  This is beaut, but you still will
+   want to copy the symbol from the buffer to a more permanent
+   symbol-table entry say about half the time.
+
+   With obstacks, you can work differently.  Use one obstack for all symbol
+   names.  As you read a symbol, grow the name in the obstack gradually.
+   When the name is complete, finalize it.  Then, if the symbol exists already,
+   free the newly read name.
+
+   The way we do this is to take a large chunk, allocating memory from
+   low addresses.  When you want to build a symbol in the chunk you just
+   add chars above the current "high water mark" in the chunk.  When you
+   have finished adding chars, because you got to the end of the symbol,
+   you know how long the chars are, and you can create a new object.
+   Mostly the chars will not burst over the highest address of the chunk,
+   because you would typically expect a chunk to be (say) 100 times as
+   long as an average object.
+
+   In case that isn't clear, when we have enough chars to make up
+   the object, THEY ARE ALREADY CONTIGUOUS IN THE CHUNK (guaranteed)
+   so we just point to it where it lies.  No moving of chars is
+   needed and this is the second win: potentially long strings need
+   never be explicitly shuffled. Once an object is formed, it does not
+   change its address during its lifetime.
+
+   When the chars burst over a chunk boundary, we allocate a larger
+   chunk, and then copy the partly formed object from the end of the old
+   chunk to the beginning of the new larger chunk.  We then carry on
+   accreting characters to the end of the object as we normally would.
+
+   A special macro is provided to add a single char at a time to a
+   growing object.  This allows the use of register variables, which
+   break the ordinary 'growth' macro.
+
+   Summary:
+        We allocate large chunks.
+        We carve out one object at a time from the current chunk.
+        Once carved, an object never moves.
+        We are free to append data of any size to the currently
+          growing object.
+        Exactly one object is growing in an obstack at any one time.
+        You can run one obstack per control block.
+        You may have as many control blocks as you dare.
+        Because of the way we do it, you can "unwind" an obstack
+          back to a previous state. (You may remove objects much
+          as you would with a stack.)
+ */
+
+
+/* Don't do the contents of this file more than once.  */
+
+#ifndef _OBSTACK_H
+#define _OBSTACK_H 1
+
+#ifndef _OBSTACK_INTERFACE_VERSION
+# define _OBSTACK_INTERFACE_VERSION 2
+#endif
+
+#include <stddef.h>             /* For size_t and ptrdiff_t.  */
+#include <string.h>             /* For __GNU_LIBRARY__, and memcpy.  */
+
+#if __STDC_VERSION__ < 199901L || defined __HP_cc
+# define __FLEXIBLE_ARRAY_MEMBER 1
+#else
+# define __FLEXIBLE_ARRAY_MEMBER
+#endif
+
+#if _OBSTACK_INTERFACE_VERSION == 1
+/* For binary compatibility with obstack version 1, which used "int"
+   and "long" for these two types.  */
+# define _OBSTACK_SIZE_T unsigned int
+# define _CHUNK_SIZE_T unsigned long
+# define _OBSTACK_CAST(type, expr) ((type) (expr))
+#else
+/* Version 2 with sane types, especially for 64-bit hosts.  */
+# define _OBSTACK_SIZE_T size_t
+# define _CHUNK_SIZE_T size_t
+# define _OBSTACK_CAST(type, expr) (expr)
+#endif
+
+/* If B is the base of an object addressed by P, return the result of
+   aligning P to the next multiple of A + 1.  B and P must be of type
+   char *.  A + 1 must be a power of 2.  */
+
+#define __BPTR_ALIGN(B, P, A) ((B) + (((P) - (B) + (A)) & ~(A)))
+
+/* Similar to __BPTR_ALIGN (B, P, A), except optimize the common case
+   where pointers can be converted to integers, aligned as integers,
+   and converted back again.  If ptrdiff_t is narrower than a
+   pointer (e.g., the AS/400), play it safe and compute the alignment
+   relative to B.  Otherwise, use the faster strategy of computing the
+   alignment relative to 0.  */
+
+#define __PTR_ALIGN(B, P, A)						      \
+  __BPTR_ALIGN (sizeof (ptrdiff_t) < sizeof (void *) ? (B) : (char *) 0,      \
+                P, A)
+
+#ifndef __attribute_pure__
+# define __attribute_pure__ _GL_ATTRIBUTE_PURE
+#endif
+
+/* Not the same as _Noreturn, since it also works with function pointers.  */
+#ifndef __attribute_noreturn__
+# if 2 < __GNUC__ + (8 <= __GNUC_MINOR__) || defined __clang__ || 0x5110 <= __SUNPRO_C
+#  define __attribute_noreturn__ __attribute__ ((__noreturn__))
+# else
+#  define __attribute_noreturn__
+# endif
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct _obstack_chunk           /* Lives at front of each chunk. */
+{
+  char *limit;                  /* 1 past end of this chunk */
+  struct _obstack_chunk *prev;  /* address of prior chunk or NULL */
+  char contents[__FLEXIBLE_ARRAY_MEMBER]; /* objects begin here */
+};
+
+struct obstack          /* control current object in current chunk */
+{
+  _CHUNK_SIZE_T chunk_size;     /* preferred size to allocate chunks in */
+  struct _obstack_chunk *chunk; /* address of current struct obstack_chunk */
+  char *object_base;            /* address of object we are building */
+  char *next_free;              /* where to add next char to current object */
+  char *chunk_limit;            /* address of char after current chunk */
+  union
+  {
+    _OBSTACK_SIZE_T i;
+    void *p;
+  } temp;                       /* Temporary for some macros.  */
+  _OBSTACK_SIZE_T alignment_mask;  /* Mask of alignment for each object. */
+
+  /* These prototypes vary based on 'use_extra_arg'.  */
+  union
+  {
+    void *(*plain) (size_t);
+    void *(*extra) (void *, size_t);
+  } chunkfun;
+  union
+  {
+    void (*plain) (void *);
+    void (*extra) (void *, void *);
+  } freefun;
+
+  void *extra_arg;              /* first arg for chunk alloc/dealloc funcs */
+  unsigned use_extra_arg : 1;     /* chunk alloc/dealloc funcs take extra arg */
+  unsigned maybe_empty_object : 1; /* There is a possibility that the current
+                                      chunk contains a zero-length object.  This
+                                      prevents freeing the chunk if we allocate
+                                      a bigger chunk to replace it. */
+  unsigned alloc_failed : 1;      /* No longer used, as we now call the failed
+                                     handler on error, but retained for binary
+                                     compatibility.  */
+};
+
+/* Declare the external functions we use; they are in obstack.c.  */
+
+extern void _obstack_newchunk (struct obstack *, _OBSTACK_SIZE_T);
+extern void _obstack_free (struct obstack *, void *);
+extern int _obstack_begin (struct obstack *,
+                           _OBSTACK_SIZE_T, _OBSTACK_SIZE_T,
+                           void *(*) (size_t), void (*) (void *));
+extern int _obstack_begin_1 (struct obstack *,
+                             _OBSTACK_SIZE_T, _OBSTACK_SIZE_T,
+                             void *(*) (void *, size_t),
+                             void (*) (void *, void *), void *);
+extern _OBSTACK_SIZE_T _obstack_memory_used (struct obstack *)
+  __attribute_pure__;
+
+
+/* Error handler called when 'obstack_chunk_alloc' failed to allocate
+   more memory.  This can be set to a user defined function which
+   should either abort gracefully or use longjump - but shouldn't
+   return.  The default action is to print a message and abort.  */
+extern __attribute_noreturn__ void (*obstack_alloc_failed_handler) (void);
+
+/* Exit value used when 'print_and_abort' is used.  */
+extern int obstack_exit_failure;
+
+/* Pointer to beginning of object being allocated or to be allocated next.
+   Note that this might not be the final address of the object
+   because a new chunk might be needed to hold the final size.  */
+
+#define obstack_base(h) ((void *) (h)->object_base)
+
+/* Size for allocating ordinary chunks.  */
+
+#define obstack_chunk_size(h) ((h)->chunk_size)
+
+/* Pointer to next byte not yet allocated in current chunk.  */
+
+#define obstack_next_free(h) ((void *) (h)->next_free)
+
+/* Mask specifying low bits that should be clear in address of an object.  */
+
+#define obstack_alignment_mask(h) ((h)->alignment_mask)
+
+/* To prevent prototype warnings provide complete argument list.  */
+#define obstack_init(h)							      \
+  _obstack_begin ((h), 0, 0,						      \
+                  _OBSTACK_CAST (void *(*) (size_t), obstack_chunk_alloc),    \
+                  _OBSTACK_CAST (void (*) (void *), obstack_chunk_free))
+
+#define obstack_begin(h, size)						      \
+  _obstack_begin ((h), (size), 0,					      \
+                  _OBSTACK_CAST (void *(*) (size_t), obstack_chunk_alloc), \
+                  _OBSTACK_CAST (void (*) (void *), obstack_chunk_free))
+
+#define obstack_specify_allocation(h, size, alignment, chunkfun, freefun)     \
+  _obstack_begin ((h), (size), (alignment),				      \
+                  _OBSTACK_CAST (void *(*) (size_t), chunkfun),		      \
+                  _OBSTACK_CAST (void (*) (void *), freefun))
+
+#define obstack_specify_allocation_with_arg(h, size, alignment, chunkfun, freefun, arg) \
+  _obstack_begin_1 ((h), (size), (alignment),				      \
+                    _OBSTACK_CAST (void *(*) (void *, size_t), chunkfun),     \
+                    _OBSTACK_CAST (void (*) (void *, void *), freefun), arg)
+
+#define obstack_chunkfun(h, newchunkfun)				      \
+  ((void) ((h)->chunkfun.extra = (void *(*) (void *, size_t)) (newchunkfun)))
+
+#define obstack_freefun(h, newfreefun)					      \
+  ((void) ((h)->freefun.extra = (void *(*) (void *, void *)) (newfreefun)))
+
+#define obstack_1grow_fast(h, achar) ((void) (*((h)->next_free)++ = (achar)))
+
+#define obstack_blank_fast(h, n) ((void) ((h)->next_free += (n)))
+
+#define obstack_memory_used(h) _obstack_memory_used (h)
+
+#if defined __GNUC__ || defined __clang__
+# if !(defined __GNUC_MINOR__ && __GNUC__ * 1000 + __GNUC_MINOR__ >= 2008 \
+       || defined __clang__)
+#  define __extension__
+# endif
+
+/* For GNU C, if not -traditional,
+   we can define these macros to compute all args only once
+   without using a global variable.
+   Also, we can avoid using the 'temp' slot, to make faster code.  */
+
+# define obstack_object_size(OBSTACK)					      \
+  __extension__								      \
+    ({ struct obstack const *__o = (OBSTACK);				      \
+       (_OBSTACK_SIZE_T) (__o->next_free - __o->object_base); })
+
+/* The local variable is named __o1 to avoid a shadowed variable
+   warning when invoked from other obstack macros.  */
+# define obstack_room(OBSTACK)						      \
+  __extension__								      \
+    ({ struct obstack const *__o1 = (OBSTACK);				      \
+       (_OBSTACK_SIZE_T) (__o1->chunk_limit - __o1->next_free); })
+
+# define obstack_make_room(OBSTACK, length)				      \
+  __extension__								      \
+    ({ struct obstack *__o = (OBSTACK);					      \
+       _OBSTACK_SIZE_T __len = (length);				      \
+       if (obstack_room (__o) < __len)					      \
+         _obstack_newchunk (__o, __len);				      \
+       (void) 0; })
+
+# define obstack_empty_p(OBSTACK)					      \
+  __extension__								      \
+    ({ struct obstack const *__o = (OBSTACK);				      \
+       (__o->chunk->prev == 0						      \
+        && __o->next_free == __PTR_ALIGN ((char *) __o->chunk,		      \
+                                          __o->chunk->contents,		      \
+                                          __o->alignment_mask)); })
+
+# define obstack_grow(OBSTACK, where, length)				      \
+  __extension__								      \
+    ({ struct obstack *__o = (OBSTACK);					      \
+       _OBSTACK_SIZE_T __len = (length);				      \
+       if (obstack_room (__o) < __len)					      \
+         _obstack_newchunk (__o, __len);				      \
+       memcpy (__o->next_free, where, __len);				      \
+       __o->next_free += __len;						      \
+       (void) 0; })
+
+# define obstack_grow0(OBSTACK, where, length)				      \
+  __extension__								      \
+    ({ struct obstack *__o = (OBSTACK);					      \
+       _OBSTACK_SIZE_T __len = (length);				      \
+       if (obstack_room (__o) < __len + 1)				      \
+         _obstack_newchunk (__o, __len + 1);				      \
+       memcpy (__o->next_free, where, __len);				      \
+       __o->next_free += __len;						      \
+       *(__o->next_free)++ = 0;						      \
+       (void) 0; })
+
+# define obstack_1grow(OBSTACK, datum)					      \
+  __extension__								      \
+    ({ struct obstack *__o = (OBSTACK);					      \
+       if (obstack_room (__o) < 1)					      \
+         _obstack_newchunk (__o, 1);					      \
+       obstack_1grow_fast (__o, datum); })
+
+/* These assume that the obstack alignment is good enough for pointers
+   or ints, and that the data added so far to the current object
+   shares that much alignment.  */
+
+# define obstack_ptr_grow(OBSTACK, datum)				      \
+  __extension__								      \
+    ({ struct obstack *__o = (OBSTACK);					      \
+       if (obstack_room (__o) < sizeof (void *))			      \
+         _obstack_newchunk (__o, sizeof (void *));			      \
+       obstack_ptr_grow_fast (__o, datum); })
+
+# define obstack_int_grow(OBSTACK, datum)				      \
+  __extension__								      \
+    ({ struct obstack *__o = (OBSTACK);					      \
+       if (obstack_room (__o) < sizeof (int))				      \
+         _obstack_newchunk (__o, sizeof (int));				      \
+       obstack_int_grow_fast (__o, datum); })
+
+# define obstack_ptr_grow_fast(OBSTACK, aptr)				      \
+  __extension__								      \
+    ({ struct obstack *__o1 = (OBSTACK);				      \
+       void *__p1 = __o1->next_free;					      \
+       *(const void **) __p1 = (aptr);					      \
+       __o1->next_free += sizeof (const void *);			      \
+       (void) 0; })
+
+# define obstack_int_grow_fast(OBSTACK, aint)				      \
+  __extension__								      \
+    ({ struct obstack *__o1 = (OBSTACK);				      \
+       void *__p1 = __o1->next_free;					      \
+       *(int *) __p1 = (aint);						      \
+       __o1->next_free += sizeof (int);					      \
+       (void) 0; })
+
+# define obstack_blank(OBSTACK, length)					      \
+  __extension__								      \
+    ({ struct obstack *__o = (OBSTACK);					      \
+       _OBSTACK_SIZE_T __len = (length);				      \
+       if (obstack_room (__o) < __len)					      \
+         _obstack_newchunk (__o, __len);				      \
+       obstack_blank_fast (__o, __len); })
+
+# define obstack_alloc(OBSTACK, length)					      \
+  __extension__								      \
+    ({ struct obstack *__h = (OBSTACK);					      \
+       obstack_blank (__h, (length));					      \
+       obstack_finish (__h); })
+
+# define obstack_copy(OBSTACK, where, length)				      \
+  __extension__								      \
+    ({ struct obstack *__h = (OBSTACK);					      \
+       obstack_grow (__h, (where), (length));				      \
+       obstack_finish (__h); })
+
+# define obstack_copy0(OBSTACK, where, length)				      \
+  __extension__								      \
+    ({ struct obstack *__h = (OBSTACK);					      \
+       obstack_grow0 (__h, (where), (length));				      \
+       obstack_finish (__h); })
+
+/* The local variable is named __o1 to avoid a shadowed variable
+   warning when invoked from other obstack macros, typically obstack_free.  */
+# define obstack_finish(OBSTACK)					      \
+  __extension__								      \
+    ({ struct obstack *__o1 = (OBSTACK);				      \
+       void *__value = (void *) __o1->object_base;			      \
+       if (__o1->next_free == __value)					      \
+         __o1->maybe_empty_object = 1;					      \
+       __o1->next_free							      \
+         = __PTR_ALIGN (__o1->object_base, __o1->next_free,		      \
+                        __o1->alignment_mask);				      \
+       if ((size_t) (__o1->next_free - (char *) __o1->chunk)		      \
+           > (size_t) (__o1->chunk_limit - (char *) __o1->chunk))	      \
+         __o1->next_free = __o1->chunk_limit;				      \
+       __o1->object_base = __o1->next_free;				      \
+       __value; })
+
+# define obstack_free(OBSTACK, OBJ)					      \
+  __extension__								      \
+    ({ struct obstack *__o = (OBSTACK);					      \
+       void *__obj = (void *) (OBJ);					      \
+       if (__obj > (void *) __o->chunk && __obj < (void *) __o->chunk_limit)  \
+         __o->next_free = __o->object_base = (char *) __obj;		      \
+       else								      \
+         _obstack_free (__o, __obj); })
+
+#else /* not __GNUC__ */
+
+# define obstack_object_size(h)						      \
+  ((_OBSTACK_SIZE_T) ((h)->next_free - (h)->object_base))
+
+# define obstack_room(h)						      \
+  ((_OBSTACK_SIZE_T) ((h)->chunk_limit - (h)->next_free))
+
+# define obstack_empty_p(h)						      \
+  ((h)->chunk->prev == 0						      \
+   && (h)->next_free == __PTR_ALIGN ((char *) (h)->chunk,		      \
+                                     (h)->chunk->contents,		      \
+                                     (h)->alignment_mask))
+
+/* Note that the call to _obstack_newchunk is enclosed in (..., 0)
+   so that we can avoid having void expressions
+   in the arms of the conditional expression.
+   Casting the third operand to void was tried before,
+   but some compilers won't accept it.  */
+
+# define obstack_make_room(h, length)					      \
+  ((h)->temp.i = (length),						      \
+   ((obstack_room (h) < (h)->temp.i)					      \
+    ? (_obstack_newchunk (h, (h)->temp.i), 0) : 0),			      \
+   (void) 0)
+
+# define obstack_grow(h, where, length)					      \
+  ((h)->temp.i = (length),						      \
+   ((obstack_room (h) < (h)->temp.i)					      \
+   ? (_obstack_newchunk ((h), (h)->temp.i), 0) : 0),			      \
+   memcpy ((h)->next_free, where, (h)->temp.i),				      \
+   (h)->next_free += (h)->temp.i,					      \
+   (void) 0)
+
+# define obstack_grow0(h, where, length)				      \
+  ((h)->temp.i = (length),						      \
+   ((obstack_room (h) < (h)->temp.i + 1)				      \
+   ? (_obstack_newchunk ((h), (h)->temp.i + 1), 0) : 0),		      \
+   memcpy ((h)->next_free, where, (h)->temp.i),				      \
+   (h)->next_free += (h)->temp.i,					      \
+   *((h)->next_free)++ = 0,						      \
+   (void) 0)
+
+# define obstack_1grow(h, datum)					      \
+  (((obstack_room (h) < 1)						      \
+    ? (_obstack_newchunk ((h), 1), 0) : 0),				      \
+   obstack_1grow_fast (h, datum))
+
+# define obstack_ptr_grow(h, datum)					      \
+  (((obstack_room (h) < sizeof (char *))				      \
+    ? (_obstack_newchunk ((h), sizeof (char *)), 0) : 0),		      \
+   obstack_ptr_grow_fast (h, datum))
+
+# define obstack_int_grow(h, datum)					      \
+  (((obstack_room (h) < sizeof (int))					      \
+    ? (_obstack_newchunk ((h), sizeof (int)), 0) : 0),			      \
+   obstack_int_grow_fast (h, datum))
+
+# define obstack_ptr_grow_fast(h, aptr)					      \
+  (((const void **) ((h)->next_free += sizeof (void *)))[-1] = (aptr),	      \
+   (void) 0)
+
+# define obstack_int_grow_fast(h, aint)					      \
+  (((int *) ((h)->next_free += sizeof (int)))[-1] = (aint),		      \
+   (void) 0)
+
+# define obstack_blank(h, length)					      \
+  ((h)->temp.i = (length),						      \
+   ((obstack_room (h) < (h)->temp.i)					      \
+   ? (_obstack_newchunk ((h), (h)->temp.i), 0) : 0),			      \
+   obstack_blank_fast (h, (h)->temp.i))
+
+# define obstack_alloc(h, length)					      \
+  (obstack_blank ((h), (length)), obstack_finish ((h)))
+
+# define obstack_copy(h, where, length)					      \
+  (obstack_grow ((h), (where), (length)), obstack_finish ((h)))
+
+# define obstack_copy0(h, where, length)				      \
+  (obstack_grow0 ((h), (where), (length)), obstack_finish ((h)))
+
+# define obstack_finish(h)						      \
+  (((h)->next_free == (h)->object_base					      \
+    ? (((h)->maybe_empty_object = 1), 0)				      \
+    : 0),								      \
+   (h)->temp.p = (h)->object_base,					      \
+   (h)->next_free							      \
+     = __PTR_ALIGN ((h)->object_base, (h)->next_free,			      \
+                    (h)->alignment_mask),				      \
+   (((size_t) ((h)->next_free - (char *) (h)->chunk)			      \
+     > (size_t) ((h)->chunk_limit - (char *) (h)->chunk))		      \
+   ? ((h)->next_free = (h)->chunk_limit) : 0),				      \
+   (h)->object_base = (h)->next_free,					      \
+   (h)->temp.p)
+
+# define obstack_free(h, obj)						      \
+  ((h)->temp.p = (void *) (obj),					      \
+   (((h)->temp.p > (void *) (h)->chunk					      \
+     && (h)->temp.p < (void *) (h)->chunk_limit)			      \
+    ? (void) ((h)->next_free = (h)->object_base = (char *) (h)->temp.p)       \
+    : _obstack_free ((h), (h)->temp.p)))
+
+#endif /* not __GNUC__ */
+
+#ifdef __cplusplus
+}       /* C++ */
+#endif
+
+#endif /* _OBSTACK_H */
diff --git a/src/grep/lib/open-safer.c b/src/grep/lib/open-safer.c
new file mode 100644
index 0000000..4bde6dd
--- /dev/null
+++ b/src/grep/lib/open-safer.c
@@ -0,0 +1,46 @@
+/* Invoke open, but avoid some glitches.
+
+   Copyright (C) 2005-2006, 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+#include <config.h>
+
+#include "fcntl-safer.h"
+
+#include <fcntl.h>
+#include <stdarg.h>
+#include "unistd-safer.h"
+
+int
+open_safer (char const *file, int flags, ...)
+{
+  mode_t mode = 0;
+
+  if (flags & O_CREAT)
+    {
+      va_list ap;
+      va_start (ap, flags);
+
+      /* We have to use PROMOTED_MODE_T instead of mode_t, otherwise GCC 4
+         creates crashing code when 'mode_t' is smaller than 'int'.  */
+      mode = va_arg (ap, PROMOTED_MODE_T);
+
+      va_end (ap);
+    }
+
+  return fd_safer (open (file, flags, mode));
+}
diff --git a/src/grep/lib/open.c b/src/grep/lib/open.c
new file mode 100644
index 0000000..372cda8
--- /dev/null
+++ b/src/grep/lib/open.c
@@ -0,0 +1,209 @@
+/* Open a descriptor to a file.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+/* If the user's config.h happens to include <fcntl.h>, let it include only
+   the system's <fcntl.h> here, so that orig_open doesn't recurse to
+   rpl_open.  */
+#define __need_system_fcntl_h
+#include <config.h>
+
+/* Get the original definition of open.  It might be defined as a macro.  */
+#include <fcntl.h>
+#include <sys/types.h>
+#undef __need_system_fcntl_h
+
+static int
+orig_open (const char *filename, int flags, mode_t mode)
+{
+#if defined _WIN32 && !defined __CYGWIN__
+  return _open (filename, flags, mode);
+#else
+  return open (filename, flags, mode);
+#endif
+}
+
+/* Specification.  */
+/* Write "fcntl.h" here, not <fcntl.h>, otherwise OSF/1 5.1 DTK cc eliminates
+   this include because of the preliminary #include <fcntl.h> above.  */
+#include "fcntl.h"
+
+#include "cloexec.h"
+
+#include <errno.h>
+#include <stdarg.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#ifndef REPLACE_OPEN_DIRECTORY
+# define REPLACE_OPEN_DIRECTORY 0
+#endif
+
+int
+open (const char *filename, int flags, ...)
+{
+  /* 0 = unknown, 1 = yes, -1 = no.  */
+#if GNULIB_defined_O_CLOEXEC
+  int have_cloexec = -1;
+#else
+  static int have_cloexec;
+#endif
+
+  mode_t mode;
+  int fd;
+
+  mode = 0;
+  if (flags & O_CREAT)
+    {
+      va_list arg;
+      va_start (arg, flags);
+
+      /* We have to use PROMOTED_MODE_T instead of mode_t, otherwise GCC 4
+         creates crashing code when 'mode_t' is smaller than 'int'.  */
+      mode = va_arg (arg, PROMOTED_MODE_T);
+
+      va_end (arg);
+    }
+
+#if GNULIB_defined_O_NONBLOCK
+  /* The only known platform that lacks O_NONBLOCK is mingw, but it
+     also lacks named pipes and Unix sockets, which are the only two
+     file types that require non-blocking handling in open().
+     Therefore, it is safe to ignore O_NONBLOCK here.  It is handy
+     that mingw also lacks openat(), so that is also covered here.  */
+  flags &= ~O_NONBLOCK;
+#endif
+
+#if defined _WIN32 && ! defined __CYGWIN__
+  if (strcmp (filename, "/dev/null") == 0)
+    filename = "NUL";
+#endif
+
+#if OPEN_TRAILING_SLASH_BUG
+  /* Fail if one of O_CREAT, O_WRONLY, O_RDWR is specified and the filename
+     ends in a slash, as POSIX says such a filename must name a directory
+     <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_13>:
+       "A pathname that contains at least one non-<slash> character and that
+        ends with one or more trailing <slash> characters shall not be resolved
+        successfully unless the last pathname component before the trailing
+        <slash> characters names an existing directory"
+     If the named file already exists as a directory, then
+       - if O_CREAT is specified, open() must fail because of the semantics
+         of O_CREAT,
+       - if O_WRONLY or O_RDWR is specified, open() must fail because POSIX
+         <https://pubs.opengroup.org/onlinepubs/9699919799/functions/open.html>
+         says that it fails with errno = EISDIR in this case.
+     If the named file does not exist or does not name a directory, then
+       - if O_CREAT is specified, open() must fail since open() cannot create
+         directories,
+       - if O_WRONLY or O_RDWR is specified, open() must fail because the
+         file does not contain a '.' directory.  */
+  if ((flags & O_CREAT)
+      || (flags & O_ACCMODE) == O_RDWR
+      || (flags & O_ACCMODE) == O_WRONLY)
+    {
+      size_t len = strlen (filename);
+      if (len > 0 && filename[len - 1] == '/')
+        {
+          errno = EISDIR;
+          return -1;
+        }
+    }
+#endif
+
+  fd = orig_open (filename,
+                  flags & ~(have_cloexec < 0 ? O_CLOEXEC : 0), mode);
+
+  if (flags & O_CLOEXEC)
+    {
+      if (! have_cloexec)
+        {
+          if (0 <= fd)
+            have_cloexec = 1;
+          else if (errno == EINVAL)
+            {
+              fd = orig_open (filename, flags & ~O_CLOEXEC, mode);
+              have_cloexec = -1;
+            }
+        }
+      if (have_cloexec < 0 && 0 <= fd)
+        set_cloexec_flag (fd, true);
+    }
+
+
+#if REPLACE_FCHDIR
+  /* Implementing fchdir and fdopendir requires the ability to open a
+     directory file descriptor.  If open doesn't support that (as on
+     mingw), we use a dummy file that behaves the same as directories
+     on Linux (ie. always reports EOF on attempts to read()), and
+     override fstat() in fchdir.c to hide the fact that we have a
+     dummy.  */
+  if (REPLACE_OPEN_DIRECTORY && fd < 0 && errno == EACCES
+      && ((flags & O_ACCMODE) == O_RDONLY
+          || (O_SEARCH != O_RDONLY && (flags & O_ACCMODE) == O_SEARCH)))
+    {
+      struct stat statbuf;
+      if (stat (filename, &statbuf) == 0 && S_ISDIR (statbuf.st_mode))
+        {
+          /* Maximum recursion depth of 1.  */
+          fd = open ("/dev/null", flags, mode);
+          if (0 <= fd)
+            fd = _gl_register_fd (fd, filename);
+        }
+      else
+        errno = EACCES;
+    }
+#endif
+
+#if OPEN_TRAILING_SLASH_BUG
+  /* If the filename ends in a slash and fd does not refer to a directory,
+     then fail.
+     Rationale: POSIX says such a filename must name a directory
+     <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_13>:
+       "A pathname that contains at least one non-<slash> character and that
+        ends with one or more trailing <slash> characters shall not be resolved
+        successfully unless the last pathname component before the trailing
+        <slash> characters names an existing directory"
+     If the named file without the slash is not a directory, open() must fail
+     with ENOTDIR.  */
+  if (fd >= 0)
+    {
+      /* We know len is positive, since open did not fail with ENOENT.  */
+      size_t len = strlen (filename);
+      if (filename[len - 1] == '/')
+        {
+          struct stat statbuf;
+
+          if (fstat (fd, &statbuf) >= 0 && !S_ISDIR (statbuf.st_mode))
+            {
+              close (fd);
+              errno = ENOTDIR;
+              return -1;
+            }
+        }
+    }
+#endif
+
+#if REPLACE_FCHDIR
+  if (!REPLACE_OPEN_DIRECTORY && 0 <= fd)
+    fd = _gl_register_fd (fd, filename);
+#endif
+
+  return fd;
+}
diff --git a/src/grep/lib/openat-die.c b/src/grep/lib/openat-die.c
new file mode 100644
index 0000000..f30e210
--- /dev/null
+++ b/src/grep/lib/openat-die.c
@@ -0,0 +1,62 @@
+/* Report a save- or restore-cwd failure in our openat replacement and then exit.
+
+   Copyright (C) 2005-2006, 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "openat.h"
+
+#include <stdlib.h>
+
+#ifndef GNULIB_LIBPOSIX
+# include "error.h"
+#endif
+
+#include "exitfail.h"
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+_Noreturn void
+openat_save_fail (int errnum)
+{
+#ifndef GNULIB_LIBPOSIX
+  error (exit_failure, errnum,
+         _("unable to record current working directory"));
+#endif
+  /* _Noreturn cannot be applied to error, since it returns
+     when its first argument is 0.  To help compilers understand that this
+     function does not return, call abort.  Also, the abort is a
+     safety feature if exit_failure is 0 (which shouldn't happen).  */
+  abort ();
+}
+
+
+/* Exit with an error about failure to restore the working directory
+   during an openat emulation.  The caller must ensure that fd 2 is
+   not a just-opened fd, even when openat_safer is not in use.  */
+
+_Noreturn void
+openat_restore_fail (int errnum)
+{
+#ifndef GNULIB_LIBPOSIX
+  error (exit_failure, errnum,
+         _("failed to return to initial working directory"));
+#endif
+
+  /* As above.  */
+  abort ();
+}
diff --git a/src/grep/lib/openat-priv.h b/src/grep/lib/openat-priv.h
new file mode 100644
index 0000000..5c42d03
--- /dev/null
+++ b/src/grep/lib/openat-priv.h
@@ -0,0 +1,64 @@
+/* Internals for openat-like functions.
+
+   Copyright (C) 2005-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering */
+
+#ifndef _GL_HEADER_OPENAT_PRIV
+#define _GL_HEADER_OPENAT_PRIV
+
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+
+/* Maximum number of bytes that it is safe to allocate as a single
+   array on the stack, and that is known as a compile-time constant.
+   The assumption is that we'll touch the array very quickly, or a
+   temporary very near the array, provoking an out-of-memory trap.  On
+   some operating systems, there is only one guard page for the stack,
+   and a page size can be as small as 4096 bytes.  Subtract 64 in the
+   hope that this will let the compiler touch a nearby temporary and
+   provoke a trap.  */
+#define SAFER_ALLOCA_MAX (4096 - 64)
+
+#define SAFER_ALLOCA(m) ((m) < SAFER_ALLOCA_MAX ? (m) : SAFER_ALLOCA_MAX)
+
+#if defined PATH_MAX
+# define OPENAT_BUFFER_SIZE SAFER_ALLOCA (PATH_MAX)
+#elif defined _XOPEN_PATH_MAX
+# define OPENAT_BUFFER_SIZE SAFER_ALLOCA (_XOPEN_PATH_MAX)
+#else
+# define OPENAT_BUFFER_SIZE SAFER_ALLOCA (1024)
+#endif
+
+char *openat_proc_name (char buf[OPENAT_BUFFER_SIZE], int fd, char const *file);
+
+/* Trying to access a BUILD_PROC_NAME file will fail on systems without
+   /proc support, and even on systems *with* ProcFS support.  Return
+   nonzero if the failure may be legitimate, e.g., because /proc is not
+   readable, or the particular .../fd/N directory is not present.  */
+#define EXPECTED_ERRNO(Errno)                   \
+  ((Errno) == ENOTDIR || (Errno) == ENOENT      \
+   || (Errno) == EPERM || (Errno) == EACCES     \
+   || (Errno) == ENOSYS /* Solaris 8 */         \
+   || (Errno) == EOPNOTSUPP /* FreeBSD */)
+
+/* Wrapper function shared among linkat and renameat.  */
+int at_func2 (int fd1, char const *file1,
+              int fd2, char const *file2,
+              int (*func) (char const *file1, char const *file2));
+
+#endif /* _GL_HEADER_OPENAT_PRIV */
diff --git a/src/grep/lib/openat-proc.c b/src/grep/lib/openat-proc.c
new file mode 100644
index 0000000..4f8be90
--- /dev/null
+++ b/src/grep/lib/openat-proc.c
@@ -0,0 +1,135 @@
+/* Create /proc/self/fd-related names for subfiles of open directories.
+
+   Copyright (C) 2006, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+#include <config.h>
+
+#include "openat-priv.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifdef __KLIBC__
+# include <InnoTekLIBC/backend.h>
+#endif
+
+#include "intprops.h"
+
+/* Set BUF to the name of the subfile of the directory identified by
+   FD, where the subfile is named FILE.  If successful, return BUF if
+   the result fits in BUF, dynamically allocated memory otherwise.
+   Return NULL (setting errno) on error.  */
+char *
+openat_proc_name (char buf[OPENAT_BUFFER_SIZE], int fd, char const *file)
+{
+  char *result = buf;
+  int dirlen;
+
+  /* Make sure the caller gets ENOENT when appropriate.  */
+  if (!*file)
+    {
+      buf[0] = '\0';
+      return buf;
+    }
+
+#ifndef __KLIBC__
+# define PROC_SELF_FD_FORMAT "/proc/self/fd/%d/"
+  {
+    enum {
+      PROC_SELF_FD_DIR_SIZE_BOUND
+        = (sizeof PROC_SELF_FD_FORMAT - (sizeof "%d" - 1)
+           + INT_STRLEN_BOUND (int))
+    };
+
+    static int proc_status = 0;
+    if (! proc_status)
+      {
+        /* Set PROC_STATUS to a positive value if /proc/self/fd is
+           reliable, and a negative value otherwise.  Solaris 10
+           /proc/self/fd mishandles "..", and any file name might expand
+           to ".." after symbolic link expansion, so avoid /proc/self/fd
+           if it mishandles "..".  Solaris 10 has openat, but this
+           problem is exhibited on code that built on Solaris 8 and
+           running on Solaris 10.  */
+
+        int proc_self_fd =
+          open ("/proc/self/fd",
+                O_SEARCH | O_DIRECTORY | O_NOCTTY | O_NONBLOCK | O_CLOEXEC);
+        if (proc_self_fd < 0)
+          proc_status = -1;
+        else
+          {
+            /* Detect whether /proc/self/fd/%i/../fd exists, where %i is the
+               number of a file descriptor open on /proc/self/fd.  On Linux,
+               that name resolves to /proc/self/fd, which was opened above.
+               However, on Solaris, it may resolve to /proc/self/fd/fd, which
+               cannot exist, since all names in /proc/self/fd are numeric.  */
+            char dotdot_buf[PROC_SELF_FD_DIR_SIZE_BOUND + sizeof "../fd" - 1];
+            sprintf (dotdot_buf, PROC_SELF_FD_FORMAT "../fd", proc_self_fd);
+            proc_status = access (dotdot_buf, F_OK) ? -1 : 1;
+            close (proc_self_fd);
+          }
+      }
+
+    if (proc_status < 0)
+      return NULL;
+    else
+      {
+        size_t bufsize = PROC_SELF_FD_DIR_SIZE_BOUND + strlen (file);
+        if (OPENAT_BUFFER_SIZE < bufsize)
+          {
+            result = malloc (bufsize);
+            if (! result)
+              return NULL;
+          }
+
+        dirlen = sprintf (result, PROC_SELF_FD_FORMAT, fd);
+      }
+  }
+#else
+  /* OS/2 kLIBC provides a function to retrieve a path from a fd.  */
+  {
+    char dir[_MAX_PATH];
+    size_t bufsize;
+
+    if (__libc_Back_ioFHToPath (fd, dir, sizeof dir))
+      return NULL;
+
+    dirlen = strlen (dir);
+    bufsize = dirlen + 1 + strlen (file) + 1; /* 1 for '/', 1 for null */
+    if (OPENAT_BUFFER_SIZE < bufsize)
+      {
+        result = malloc (bufsize);
+        if (! result)
+          return NULL;
+      }
+
+    strcpy (result, dir);
+    result[dirlen++] = '/';
+  }
+#endif
+
+  strcpy (result + dirlen, file);
+  return result;
+}
diff --git a/src/grep/lib/openat-safer.c b/src/grep/lib/openat-safer.c
new file mode 100644
index 0000000..3dfd5d4
--- /dev/null
+++ b/src/grep/lib/openat-safer.c
@@ -0,0 +1,46 @@
+/* Invoke openat, but avoid some glitches.
+
+   Copyright (C) 2005-2006, 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert for open, ported by Eric Blake for openat.  */
+
+#include <config.h>
+
+#include "fcntl-safer.h"
+
+#include <fcntl.h>
+#include <stdarg.h>
+#include "unistd-safer.h"
+
+int
+openat_safer (int fd, char const *file, int flags, ...)
+{
+  mode_t mode = 0;
+
+  if (flags & O_CREAT)
+    {
+      va_list ap;
+      va_start (ap, flags);
+
+      /* We have to use PROMOTED_MODE_T instead of mode_t, otherwise GCC 4
+         creates crashing code when 'mode_t' is smaller than 'int'.  */
+      mode = va_arg (ap, PROMOTED_MODE_T);
+
+      va_end (ap);
+    }
+
+  return fd_safer (openat (fd, file, flags, mode));
+}
diff --git a/src/grep/lib/openat.c b/src/grep/lib/openat.c
new file mode 100644
index 0000000..ac92374
--- /dev/null
+++ b/src/grep/lib/openat.c
@@ -0,0 +1,312 @@
+/* provide a replacement openat function
+   Copyright (C) 2004-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering */
+
+/* If the user's config.h happens to include <fcntl.h>, let it include only
+   the system's <fcntl.h> here, so that orig_openat doesn't recurse to
+   rpl_openat.  */
+#define __need_system_fcntl_h
+#include <config.h>
+
+/* Get the original definition of open.  It might be defined as a macro.  */
+#include <fcntl.h>
+#include <sys/types.h>
+#undef __need_system_fcntl_h
+
+#if HAVE_OPENAT
+static int
+orig_openat (int fd, char const *filename, int flags, mode_t mode)
+{
+  return openat (fd, filename, flags, mode);
+}
+#endif
+
+/* Write "fcntl.h" here, not <fcntl.h>, otherwise OSF/1 5.1 DTK cc eliminates
+   this include because of the preliminary #include <fcntl.h> above.  */
+#include "fcntl.h"
+
+#include "openat.h"
+
+#include "cloexec.h"
+
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+#if HAVE_OPENAT
+
+/* Like openat, but support O_CLOEXEC and work around Solaris 9 bugs
+   with trailing slash.  */
+int
+rpl_openat (int dfd, char const *filename, int flags, ...)
+{
+  /* 0 = unknown, 1 = yes, -1 = no.  */
+#if GNULIB_defined_O_CLOEXEC
+  int have_cloexec = -1;
+#else
+  static int have_cloexec;
+#endif
+
+  mode_t mode;
+  int fd;
+
+  mode = 0;
+  if (flags & O_CREAT)
+    {
+      va_list arg;
+      va_start (arg, flags);
+
+      /* We have to use PROMOTED_MODE_T instead of mode_t, otherwise GCC 4
+         creates crashing code when 'mode_t' is smaller than 'int'.  */
+      mode = va_arg (arg, PROMOTED_MODE_T);
+
+      va_end (arg);
+    }
+
+# if OPEN_TRAILING_SLASH_BUG
+  /* Fail if one of O_CREAT, O_WRONLY, O_RDWR is specified and the filename
+     ends in a slash, as POSIX says such a filename must name a directory
+     <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_13>:
+       "A pathname that contains at least one non-<slash> character and that
+        ends with one or more trailing <slash> characters shall not be resolved
+        successfully unless the last pathname component before the trailing
+        <slash> characters names an existing directory"
+     If the named file already exists as a directory, then
+       - if O_CREAT is specified, open() must fail because of the semantics
+         of O_CREAT,
+       - if O_WRONLY or O_RDWR is specified, open() must fail because POSIX
+         <https://pubs.opengroup.org/onlinepubs/9699919799/functions/openat.html>
+         says that it fails with errno = EISDIR in this case.
+     If the named file does not exist or does not name a directory, then
+       - if O_CREAT is specified, open() must fail since open() cannot create
+         directories,
+       - if O_WRONLY or O_RDWR is specified, open() must fail because the
+         file does not contain a '.' directory.  */
+  if ((flags & O_CREAT)
+      || (flags & O_ACCMODE) == O_RDWR
+      || (flags & O_ACCMODE) == O_WRONLY)
+    {
+      size_t len = strlen (filename);
+      if (len > 0 && filename[len - 1] == '/')
+        {
+          errno = EISDIR;
+          return -1;
+        }
+    }
+# endif
+
+  fd = orig_openat (dfd, filename,
+                    flags & ~(have_cloexec < 0 ? O_CLOEXEC : 0), mode);
+
+  if (flags & O_CLOEXEC)
+    {
+      if (! have_cloexec)
+        {
+          if (0 <= fd)
+            have_cloexec = 1;
+          else if (errno == EINVAL)
+            {
+              fd = orig_openat (dfd, filename, flags & ~O_CLOEXEC, mode);
+              have_cloexec = -1;
+            }
+        }
+      if (have_cloexec < 0 && 0 <= fd)
+        set_cloexec_flag (fd, true);
+    }
+
+
+# if OPEN_TRAILING_SLASH_BUG
+  /* If the filename ends in a slash and fd does not refer to a directory,
+     then fail.
+     Rationale: POSIX says such a filename must name a directory
+     <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_13>:
+       "A pathname that contains at least one non-<slash> character and that
+        ends with one or more trailing <slash> characters shall not be resolved
+        successfully unless the last pathname component before the trailing
+        <slash> characters names an existing directory"
+     If the named file without the slash is not a directory, open() must fail
+     with ENOTDIR.  */
+  if (fd >= 0)
+    {
+      /* We know len is positive, since open did not fail with ENOENT.  */
+      size_t len = strlen (filename);
+      if (filename[len - 1] == '/')
+        {
+          struct stat statbuf;
+
+          if (fstat (fd, &statbuf) >= 0 && !S_ISDIR (statbuf.st_mode))
+            {
+              close (fd);
+              errno = ENOTDIR;
+              return -1;
+            }
+        }
+    }
+# endif
+
+  return fd;
+}
+
+#else /* !HAVE_OPENAT */
+
+# include "filename.h" /* solely for definition of IS_ABSOLUTE_FILE_NAME */
+# include "openat-priv.h"
+# include "save-cwd.h"
+
+/* Replacement for Solaris' openat function.
+   <https://www.google.com/search?q=openat+site:docs.oracle.com>
+   First, try to simulate it via open ("/proc/self/fd/FD/FILE").
+   Failing that, simulate it by doing save_cwd/fchdir/open/restore_cwd.
+   If either the save_cwd or the restore_cwd fails (relatively unlikely),
+   then give a diagnostic and exit nonzero.
+   Otherwise, upon failure, set errno and return -1, as openat does.
+   Upon successful completion, return a file descriptor.  */
+int
+openat (int fd, char const *file, int flags, ...)
+{
+  mode_t mode = 0;
+
+  if (flags & O_CREAT)
+    {
+      va_list arg;
+      va_start (arg, flags);
+
+      /* We have to use PROMOTED_MODE_T instead of mode_t, otherwise GCC 4
+         creates crashing code when 'mode_t' is smaller than 'int'.  */
+      mode = va_arg (arg, PROMOTED_MODE_T);
+
+      va_end (arg);
+    }
+
+  return openat_permissive (fd, file, flags, mode, NULL);
+}
+
+/* Like openat (FD, FILE, FLAGS, MODE), but if CWD_ERRNO is
+   nonnull, set *CWD_ERRNO to an errno value if unable to save
+   or restore the initial working directory.  This is needed only
+   the first time remove.c's remove_dir opens a command-line
+   directory argument.
+
+   If a previous attempt to restore the current working directory
+   failed, then we must not even try to access a '.'-relative name.
+   It is the caller's responsibility not to call this function
+   in that case.  */
+
+int
+openat_permissive (int fd, char const *file, int flags, mode_t mode,
+                   int *cwd_errno)
+{
+  struct saved_cwd saved_cwd;
+  int saved_errno;
+  int err;
+  bool save_ok;
+
+  if (fd == AT_FDCWD || IS_ABSOLUTE_FILE_NAME (file))
+    return open (file, flags, mode);
+
+  {
+    char buf[OPENAT_BUFFER_SIZE];
+    char *proc_file = openat_proc_name (buf, fd, file);
+    if (proc_file)
+      {
+        int open_result = open (proc_file, flags, mode);
+        int open_errno = errno;
+        if (proc_file != buf)
+          free (proc_file);
+        /* If the syscall succeeds, or if it fails with an unexpected
+           errno value, then return right away.  Otherwise, fall through
+           and resort to using save_cwd/restore_cwd.  */
+        if (0 <= open_result || ! EXPECTED_ERRNO (open_errno))
+          {
+            errno = open_errno;
+            return open_result;
+          }
+      }
+  }
+
+  save_ok = (save_cwd (&saved_cwd) == 0);
+  if (! save_ok)
+    {
+      if (! cwd_errno)
+        openat_save_fail (errno);
+      *cwd_errno = errno;
+    }
+  if (0 <= fd && fd == saved_cwd.desc)
+    {
+      /* If saving the working directory collides with the user's
+         requested fd, then the user's fd must have been closed to
+         begin with.  */
+      free_cwd (&saved_cwd);
+      errno = EBADF;
+      return -1;
+    }
+
+  err = fchdir (fd);
+  saved_errno = errno;
+
+  if (! err)
+    {
+      err = open (file, flags, mode);
+      saved_errno = errno;
+      if (save_ok && restore_cwd (&saved_cwd) != 0)
+        {
+          if (! cwd_errno)
+            {
+              /* Don't write a message to just-created fd 2.  */
+              saved_errno = errno;
+              if (err == STDERR_FILENO)
+                close (err);
+              openat_restore_fail (saved_errno);
+            }
+          *cwd_errno = errno;
+        }
+    }
+
+  free_cwd (&saved_cwd);
+  errno = saved_errno;
+  return err;
+}
+
+/* Return true if our openat implementation must resort to
+   using save_cwd and restore_cwd.  */
+bool
+openat_needs_fchdir (void)
+{
+  bool needs_fchdir = true;
+  int fd = open ("/", O_SEARCH | O_CLOEXEC);
+
+  if (0 <= fd)
+    {
+      char buf[OPENAT_BUFFER_SIZE];
+      char *proc_file = openat_proc_name (buf, fd, ".");
+      if (proc_file)
+        {
+          needs_fchdir = false;
+          if (proc_file != buf)
+            free (proc_file);
+        }
+      close (fd);
+    }
+
+  return needs_fchdir;
+}
+
+#endif /* !HAVE_OPENAT */
diff --git a/src/grep/lib/openat.h b/src/grep/lib/openat.h
new file mode 100644
index 0000000..7098124
--- /dev/null
+++ b/src/grep/lib/openat.h
@@ -0,0 +1,123 @@
+/* provide a replacement openat function
+   Copyright (C) 2004-2006, 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering */
+
+#ifndef _GL_HEADER_OPENAT
+#define _GL_HEADER_OPENAT
+
+#include <fcntl.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <stdbool.h>
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+
+#if !HAVE_OPENAT
+
+int openat_permissive (int fd, char const *file, int flags, mode_t mode,
+                       int *cwd_errno);
+bool openat_needs_fchdir (void);
+
+#else
+
+# define openat_permissive(Fd, File, Flags, Mode, Cwd_errno) \
+    openat (Fd, File, Flags, Mode)
+# define openat_needs_fchdir() false
+
+#endif
+
+_Noreturn void openat_restore_fail (int);
+_Noreturn void openat_save_fail (int);
+
+/* Using these function names makes application code
+   slightly more readable than it would be with
+   fchownat (..., 0) or fchownat (..., AT_SYMLINK_NOFOLLOW).  */
+
+#if GNULIB_CHOWNAT
+
+# ifndef CHOWNAT_INLINE
+#  define CHOWNAT_INLINE _GL_INLINE
+# endif
+
+CHOWNAT_INLINE int
+chownat (int fd, char const *file, uid_t owner, gid_t group)
+{
+  return fchownat (fd, file, owner, group, 0);
+}
+
+CHOWNAT_INLINE int
+lchownat (int fd, char const *file, uid_t owner, gid_t group)
+{
+  return fchownat (fd, file, owner, group, AT_SYMLINK_NOFOLLOW);
+}
+
+#endif
+
+#if GNULIB_CHMODAT
+
+# ifndef CHMODAT_INLINE
+#  define CHMODAT_INLINE _GL_INLINE
+# endif
+
+CHMODAT_INLINE int
+chmodat (int fd, char const *file, mode_t mode)
+{
+  return fchmodat (fd, file, mode, 0);
+}
+
+CHMODAT_INLINE int
+lchmodat (int fd, char const *file, mode_t mode)
+{
+  return fchmodat (fd, file, mode, AT_SYMLINK_NOFOLLOW);
+}
+
+#endif
+
+#if GNULIB_STATAT
+
+# ifndef STATAT_INLINE
+#  define STATAT_INLINE _GL_INLINE
+# endif
+
+STATAT_INLINE int
+statat (int fd, char const *name, struct stat *st)
+{
+  return fstatat (fd, name, st, 0);
+}
+
+STATAT_INLINE int
+lstatat (int fd, char const *name, struct stat *st)
+{
+  return fstatat (fd, name, st, AT_SYMLINK_NOFOLLOW);
+}
+
+#endif
+
+/* For now, there are no wrappers named laccessat or leuidaccessat,
+   since gnulib doesn't support faccessat(,AT_SYMLINK_NOFOLLOW) and
+   since access rights on symlinks are of limited utility.  Likewise,
+   wrappers are not provided for accessat or euidaccessat, so as to
+   avoid dragging in -lgen on some platforms.  */
+
+_GL_INLINE_HEADER_END
+
+#endif /* _GL_HEADER_OPENAT */
diff --git a/src/grep/lib/opendir.c b/src/grep/lib/opendir.c
new file mode 100644
index 0000000..2b86529
--- /dev/null
+++ b/src/grep/lib/opendir.c
@@ -0,0 +1,179 @@
+/* Start reading the entries of a directory.
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <dirent.h>
+
+#include <errno.h>
+#include <stddef.h>
+
+#if HAVE_OPENDIR
+
+/* Override opendir(), to keep track of the open file descriptors.
+   Needed because there is a function dirfd().  */
+
+#else
+
+# include <stdlib.h>
+
+# include "dirent-private.h"
+# include "filename.h"
+
+#endif
+
+#if REPLACE_FCHDIR
+# include <unistd.h>
+#endif
+
+#ifdef __KLIBC__
+# include <io.h>
+# include <fcntl.h>
+#endif
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Don't assume that UNICODE is not defined.  */
+# undef WIN32_FIND_DATA
+# define WIN32_FIND_DATA WIN32_FIND_DATAA
+# undef GetFullPathName
+# define GetFullPathName GetFullPathNameA
+# undef FindFirstFile
+# define FindFirstFile FindFirstFileA
+#endif
+
+DIR *
+opendir (const char *dir_name)
+{
+#if HAVE_OPENDIR
+# undef opendir
+  DIR *dirp;
+
+  dirp = opendir (dir_name);
+  if (dirp == NULL)
+    return NULL;
+
+# ifdef __KLIBC__
+  {
+    int fd = open (dir_name, O_RDONLY);
+    if (fd == -1 || _gl_register_dirp_fd (fd, dirp))
+      {
+        int saved_errno = errno;
+
+        close (fd);
+        closedir (dirp);
+
+        errno = saved_errno;
+
+        return NULL;
+      }
+  }
+# endif
+#else
+
+  char dir_name_mask[MAX_PATH + 1 + 1 + 1];
+  int status;
+  HANDLE current;
+  WIN32_FIND_DATA entry;
+  struct gl_directory *dirp;
+
+  if (dir_name[0] == '\0')
+    {
+      errno = ENOENT;
+      return NULL;
+    }
+
+  /* Make the dir_name absolute, so that we continue reading the same
+     directory if the current directory changed between this opendir()
+     call and a subsequent rewinddir() call.  */
+  if (!GetFullPathName (dir_name, MAX_PATH, dir_name_mask, NULL))
+    {
+      errno = EINVAL;
+      return NULL;
+    }
+
+  /* Append the mask.
+     "*" and "*.*" appear to be equivalent.  */
+  {
+    char *p;
+
+    p = dir_name_mask + strlen (dir_name_mask);
+    if (p > dir_name_mask && !ISSLASH (p[-1]))
+      *p++ = '\\';
+    *p++ = '*';
+    *p = '\0';
+  }
+
+  /* Start searching the directory.  */
+  status = -1;
+  current = FindFirstFile (dir_name_mask, &entry);
+  if (current == INVALID_HANDLE_VALUE)
+    {
+      switch (GetLastError ())
+        {
+        case ERROR_FILE_NOT_FOUND:
+          status = -2;
+          break;
+        case ERROR_PATH_NOT_FOUND:
+          errno = ENOENT;
+          return NULL;
+        case ERROR_DIRECTORY:
+          errno = ENOTDIR;
+          return NULL;
+        case ERROR_ACCESS_DENIED:
+          errno = EACCES;
+          return NULL;
+        default:
+          errno = EIO;
+          return NULL;
+        }
+    }
+
+  /* Allocate the result.  */
+  dirp =
+    (struct gl_directory *)
+    malloc (offsetof (struct gl_directory, dir_name_mask[0])
+            + strlen (dir_name_mask) + 1);
+  if (dirp == NULL)
+    {
+      if (current != INVALID_HANDLE_VALUE)
+        FindClose (current);
+      errno = ENOMEM;
+      return NULL;
+    }
+  dirp->status = status;
+  dirp->current = current;
+  if (status == -1)
+    memcpy (&dirp->entry, &entry, sizeof (WIN32_FIND_DATA));
+  strcpy (dirp->dir_name_mask, dir_name_mask);
+
+#endif
+
+#if REPLACE_FCHDIR
+  {
+    int fd = dirfd (dirp);
+    if (0 <= fd && _gl_register_fd (fd, dir_name) != fd)
+      {
+        int saved_errno = errno;
+        closedir (dirp);
+        errno = saved_errno;
+        return NULL;
+      }
+  }
+#endif
+
+  return dirp;
+}
diff --git a/src/grep/lib/opendirat.c b/src/grep/lib/opendirat.c
new file mode 100644
index 0000000..116d6dd
--- /dev/null
+++ b/src/grep/lib/opendirat.c
@@ -0,0 +1,54 @@
+/* Open a directory relative to another directory.
+
+   Copyright 2006-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+   Written by Jim Meyering and Paul Eggert.  */
+
+#include <config.h>
+
+#include <opendirat.h>
+
+#include <errno.h>
+#include <fcntl--.h>
+#include <unistd.h>
+
+/* Relative to DIR_FD, open the directory DIR, passing EXTRA_FLAGS to
+   the underlying openat call.  On success, store into *PNEW_FD the
+   underlying file descriptor of the newly opened directory and return
+   the directory stream.  On failure, return NULL and set errno.
+
+   On success, *PNEW_FD is at least 3, so this is a "safer" function.  */
+
+DIR *
+opendirat (int dir_fd, char const *dir, int extra_flags, int *pnew_fd)
+{
+  int open_flags = (O_RDONLY | O_CLOEXEC | O_DIRECTORY | O_NOCTTY
+                    | O_NONBLOCK | extra_flags);
+  int new_fd = openat (dir_fd, dir, open_flags);
+
+  if (new_fd < 0)
+    return NULL;
+  DIR *dirp = fdopendir (new_fd);
+  if (dirp)
+    *pnew_fd = new_fd;
+  else
+    {
+      int fdopendir_errno = errno;
+      close (new_fd);
+      errno = fdopendir_errno;
+    }
+  return dirp;
+}
diff --git a/src/grep/lib/opendirat.h b/src/grep/lib/opendirat.h
new file mode 100644
index 0000000..9765615
--- /dev/null
+++ b/src/grep/lib/opendirat.h
@@ -0,0 +1,21 @@
+/* Open a directory relative to another directory.
+
+   Copyright (C) 2018-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3 of the License,
+   or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <dirent.h>
+
+DIR *opendirat (int, char const *, int, int *)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC (closedir, 1);
diff --git a/src/grep/lib/pathmax.h b/src/grep/lib/pathmax.h
new file mode 100644
index 0000000..716f4a9
--- /dev/null
+++ b/src/grep/lib/pathmax.h
@@ -0,0 +1,83 @@
+/* Define PATH_MAX somehow.  Requires sys/types.h.
+   Copyright (C) 1992, 1999, 2001, 2003, 2005, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _PATHMAX_H
+# define _PATHMAX_H
+
+/* POSIX:2008 defines PATH_MAX to be the maximum number of bytes in a filename,
+   including the terminating NUL byte.
+   <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/limits.h.html>
+   PATH_MAX is not defined on systems which have no limit on filename length,
+   such as GNU/Hurd.
+
+   This file does *not* define PATH_MAX always.  Programs that use this file
+   can handle the GNU/Hurd case in several ways:
+     - Either with a package-wide handling, or with a per-file handling,
+     - Either through a
+         #ifdef PATH_MAX
+       or through a fallback like
+         #ifndef PATH_MAX
+         # define PATH_MAX 8192
+         #endif
+       or through a fallback like
+         #ifndef PATH_MAX
+         # define PATH_MAX pathconf ("/", _PC_PATH_MAX)
+         #endif
+ */
+
+# include <unistd.h>
+
+# include <limits.h>
+
+# ifndef _POSIX_PATH_MAX
+#  define _POSIX_PATH_MAX 256
+# endif
+
+/* Don't include sys/param.h if it already has been.  */
+# if defined HAVE_SYS_PARAM_H && !defined PATH_MAX && !defined MAXPATHLEN
+#  include <sys/param.h>
+# endif
+
+# if !defined PATH_MAX && defined MAXPATHLEN
+#  define PATH_MAX MAXPATHLEN
+# endif
+
+# ifdef __hpux
+/* On HP-UX, PATH_MAX designates the maximum number of bytes in a filename,
+   *not* including the terminating NUL byte, and is set to 1023.
+   Additionally, when _XOPEN_SOURCE is defined to 500 or more, PATH_MAX is
+   not defined at all any more.  */
+#  undef PATH_MAX
+#  define PATH_MAX 1024
+# endif
+
+# if defined _WIN32 && ! defined __CYGWIN__
+/* The page "Naming Files, Paths, and Namespaces" on msdn.microsoft.com,
+   section "Maximum Path Length Limitation",
+   <https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file#maximum-path-length-limitation>
+   explains that the maximum size of a filename, including the terminating
+   NUL byte, is 260 = 3 + 256 + 1.
+   This is the same value as
+     - FILENAME_MAX in <stdio.h>,
+     - _MAX_PATH in <stdlib.h>,
+     - MAX_PATH in <windef.h>.
+   Undefine the original value, because mingw's <limits.h> gets it wrong.  */
+#  undef PATH_MAX
+#  define PATH_MAX 260
+# endif
+
+#endif /* _PATHMAX_H */
diff --git a/src/grep/lib/pipe-safer.c b/src/grep/lib/pipe-safer.c
new file mode 100644
index 0000000..efa4bd6
--- /dev/null
+++ b/src/grep/lib/pipe-safer.c
@@ -0,0 +1,52 @@
+/* Invoke pipe, but avoid some glitches.
+   Copyright (C) 2005-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering.  */
+
+#include <config.h>
+
+#include "unistd-safer.h"
+
+#include <unistd.h>
+#include <errno.h>
+
+/* Like pipe, but ensure that neither of the file descriptors is
+   STDIN_FILENO, STDOUT_FILENO, or STDERR_FILENO.  Fail with ENOSYS on
+   platforms that lack pipe.  */
+
+int
+pipe_safer (int fd[2])
+{
+  if (pipe (fd) == 0)
+    {
+      int i;
+      for (i = 0; i < 2; i++)
+        {
+          fd[i] = fd_safer (fd[i]);
+          if (fd[i] < 0)
+            {
+              int saved_errno = errno;
+              close (fd[1 - i]);
+              errno = saved_errno;
+              return -1;
+            }
+        }
+
+      return 0;
+    }
+
+  return -1;
+}
diff --git a/src/grep/lib/pipe.c b/src/grep/lib/pipe.c
new file mode 100644
index 0000000..fc978f2
--- /dev/null
+++ b/src/grep/lib/pipe.c
@@ -0,0 +1,50 @@
+/* Create a pipe.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Native Windows API.  */
+
+/* Get _pipe().  */
+# include <io.h>
+
+/* Get _O_BINARY.  */
+# include <fcntl.h>
+
+int
+pipe (int fd[2])
+{
+  /* Mingw changes fd to {-1,-1} on failure, but this violates
+     http://austingroupbugs.net/view.php?id=467 */
+  int tmp[2];
+  int result = _pipe (tmp, 4096, _O_BINARY);
+  if (!result)
+    {
+      fd[0] = tmp[0];
+      fd[1] = tmp[1];
+    }
+  return result;
+}
+
+#else
+
+# error "This platform lacks a pipe function, and Gnulib doesn't provide a replacement. This is a bug in Gnulib."
+
+#endif
diff --git a/src/grep/lib/propername.c b/src/grep/lib/propername.c
new file mode 100644
index 0000000..561566b
--- /dev/null
+++ b/src/grep/lib/propername.c
@@ -0,0 +1,318 @@
+/* Localization of proper names.
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2006.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Without this pragma, gcc 4.7.0 20111124 mistakenly suggests that
+   the proper_name function might be candidate for attribute 'const'  */
+#if (__GNUC__ == 4 && 6 <= __GNUC_MINOR__) || 4 < __GNUC__
+# pragma GCC diagnostic ignored "-Wsuggest-attribute=const"
+#endif
+
+#include <config.h>
+
+/* Specification.  */
+#include "propername.h"
+
+#include <ctype.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#if HAVE_ICONV
+# include <iconv.h>
+#endif
+
+#include "trim.h"
+#include "mbchar.h"
+#include "mbuiter.h"
+#include "localcharset.h"
+#include "c-strcase.h"
+#include "xstriconv.h"
+#include "xalloc.h"
+#include "gettext.h"
+
+
+/* Tests whether STRING contains trim (SUB), starting and ending at word
+   boundaries.
+   Here, instead of implementing Unicode Standard Annex #29 for determining
+   word boundaries, we assume that trim (SUB) starts and ends with words and
+   only test whether the part before it ends with a non-word and the part
+   after it starts with a non-word.  */
+static bool
+mbsstr_trimmed_wordbounded (const char *string, const char *sub)
+{
+  char *tsub = trim (sub);
+  bool found = false;
+
+  for (; *string != '\0';)
+    {
+      const char *tsub_in_string = mbsstr (string, tsub);
+      if (tsub_in_string == NULL)
+        break;
+      else
+        {
+          if (MB_CUR_MAX > 1)
+            {
+              mbui_iterator_t string_iter;
+              bool word_boundary_before;
+              bool word_boundary_after;
+
+              mbui_init (string_iter, string);
+              word_boundary_before = true;
+              if (mbui_cur_ptr (string_iter) < tsub_in_string)
+                {
+                  mbchar_t last_char_before_tsub;
+                  do
+                    {
+                      if (!mbui_avail (string_iter))
+                        abort ();
+                      last_char_before_tsub = mbui_cur (string_iter);
+                      mbui_advance (string_iter);
+                    }
+                  while (mbui_cur_ptr (string_iter) < tsub_in_string);
+                  if (mb_isalnum (last_char_before_tsub))
+                    word_boundary_before = false;
+                }
+
+              mbui_init (string_iter, tsub_in_string);
+              {
+                mbui_iterator_t tsub_iter;
+
+                for (mbui_init (tsub_iter, tsub);
+                     mbui_avail (tsub_iter);
+                     mbui_advance (tsub_iter))
+                  {
+                    if (!mbui_avail (string_iter))
+                      abort ();
+                    mbui_advance (string_iter);
+                  }
+              }
+              word_boundary_after = true;
+              if (mbui_avail (string_iter))
+                {
+                  mbchar_t first_char_after_tsub = mbui_cur (string_iter);
+                  if (mb_isalnum (first_char_after_tsub))
+                    word_boundary_after = false;
+                }
+
+              if (word_boundary_before && word_boundary_after)
+                {
+                  found = true;
+                  break;
+                }
+
+              mbui_init (string_iter, tsub_in_string);
+              if (!mbui_avail (string_iter))
+                break;
+              string = tsub_in_string + mb_len (mbui_cur (string_iter));
+            }
+          else
+            {
+              bool word_boundary_before;
+              const char *p;
+              bool word_boundary_after;
+
+              word_boundary_before = true;
+              if (string < tsub_in_string)
+                if (isalnum ((unsigned char) tsub_in_string[-1]))
+                  word_boundary_before = false;
+
+              p = tsub_in_string + strlen (tsub);
+              word_boundary_after = true;
+              if (*p != '\0')
+                if (isalnum ((unsigned char) *p))
+                  word_boundary_after = false;
+
+              if (word_boundary_before && word_boundary_after)
+                {
+                  found = true;
+                  break;
+                }
+
+              if (*tsub_in_string == '\0')
+                break;
+              string = tsub_in_string + 1;
+            }
+        }
+    }
+  free (tsub);
+  return found;
+}
+
+/* Return the localization of NAME.  NAME is written in ASCII.  */
+
+const char *
+proper_name (const char *name)
+{
+  /* See whether there is a translation.   */
+  const char *translation = gettext (name);
+
+  if (translation != name)
+    {
+      /* See whether the translation contains the original name.  */
+      if (mbsstr_trimmed_wordbounded (translation, name))
+        return translation;
+      else
+        {
+          /* Return "TRANSLATION (NAME)".  */
+          char *result =
+            XNMALLOC (strlen (translation) + 2 + strlen (name) + 1 + 1, char);
+
+          sprintf (result, "%s (%s)", translation, name);
+          return result;
+        }
+    }
+  else
+    return name;
+}
+
+/* Return the localization of a name whose original writing is not ASCII.
+   NAME_UTF8 is the real name, written in UTF-8 with octal or hexadecimal
+   escape sequences.  NAME_ASCII is a fallback written only with ASCII
+   characters.  */
+
+const char *
+proper_name_utf8 (const char *name_ascii, const char *name_utf8)
+{
+  /* See whether there is a translation.   */
+  const char *translation = gettext (name_ascii);
+
+  /* Try to convert NAME_UTF8 to the locale encoding.  */
+  const char *locale_code = locale_charset ();
+  char *alloc_name_converted = NULL;
+  char *alloc_name_converted_translit = NULL;
+  const char *name_converted = NULL;
+  const char *name_converted_translit = NULL;
+  const char *name;
+
+  if (c_strcasecmp (locale_code, "UTF-8") != 0)
+    {
+#if HAVE_ICONV
+      name_converted = alloc_name_converted =
+        xstr_iconv (name_utf8, "UTF-8", locale_code);
+
+# if (((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2) || __GLIBC__ > 2) \
+      && !defined __UCLIBC__) \
+     || _LIBICONV_VERSION >= 0x0105
+      {
+        char *converted_translit;
+
+        size_t len = strlen (locale_code);
+        char *locale_code_translit = XNMALLOC (len + 10 + 1, char);
+        memcpy (locale_code_translit, locale_code, len);
+        memcpy (locale_code_translit + len, "//TRANSLIT", 10 + 1);
+
+        converted_translit =
+          xstr_iconv (name_utf8, "UTF-8", locale_code_translit);
+
+        free (locale_code_translit);
+
+        if (converted_translit != NULL)
+          {
+#  if !_LIBICONV_VERSION
+            /* Don't use the transliteration if it added question marks.
+               glibc's transliteration falls back to question marks; libiconv's
+               transliteration does not.
+               mbschr is equivalent to strchr in this case.  */
+            if (strchr (converted_translit, '?') != NULL)
+              free (converted_translit);
+            else
+#  endif
+              name_converted_translit = alloc_name_converted_translit =
+                converted_translit;
+          }
+      }
+# endif
+#endif
+    }
+  else
+    {
+      name_converted = name_utf8;
+      name_converted_translit = name_utf8;
+    }
+
+  /* The name in locale encoding.  */
+  name = (name_converted != NULL ? name_converted :
+          name_converted_translit != NULL ? name_converted_translit :
+          name_ascii);
+
+  /* See whether we have a translation.  Some translators have not understood
+     that they should use the UTF-8 form of the name, if possible.  So if the
+     translator provided a no-op translation, we ignore it.  */
+  if (strcmp (translation, name_ascii) != 0)
+    {
+      /* See whether the translation contains the original name.  */
+      if (mbsstr_trimmed_wordbounded (translation, name_ascii)
+          || (name_converted != NULL
+              && mbsstr_trimmed_wordbounded (translation, name_converted))
+          || (name_converted_translit != NULL
+              && mbsstr_trimmed_wordbounded (translation, name_converted_translit)))
+        {
+          if (alloc_name_converted != NULL)
+            free (alloc_name_converted);
+          if (alloc_name_converted_translit != NULL)
+            free (alloc_name_converted_translit);
+          return translation;
+        }
+      else
+        {
+          /* Return "TRANSLATION (NAME)".  */
+          char *result =
+            XNMALLOC (strlen (translation) + 2 + strlen (name) + 1 + 1, char);
+
+          sprintf (result, "%s (%s)", translation, name);
+
+          if (alloc_name_converted != NULL)
+            free (alloc_name_converted);
+          if (alloc_name_converted_translit != NULL)
+            free (alloc_name_converted_translit);
+          return result;
+        }
+    }
+  else
+    {
+      if (alloc_name_converted != NULL && alloc_name_converted != name)
+        free (alloc_name_converted);
+      if (alloc_name_converted_translit != NULL
+          && alloc_name_converted_translit != name)
+        free (alloc_name_converted_translit);
+      return name;
+    }
+}
+
+#ifdef TEST1
+# include <locale.h>
+int
+main (int argc, char *argv[])
+{
+  setlocale (LC_ALL, "");
+  if (mbsstr_trimmed_wordbounded (argv[1], argv[2]))
+    printf("found\n");
+  return 0;
+}
+#endif
+
+#ifdef TEST2
+# include <locale.h>
+# include <stdio.h>
+int
+main (int argc, char *argv[])
+{
+  setlocale (LC_ALL, "");
+  printf ("%s\n", proper_name_utf8 ("Franc,ois Pinard", "Fran\303\247ois Pinard"));
+  return 0;
+}
+#endif
diff --git a/src/grep/lib/propername.h b/src/grep/lib/propername.h
new file mode 100644
index 0000000..ee09d7c
--- /dev/null
+++ b/src/grep/lib/propername.h
@@ -0,0 +1,96 @@
+/* Localization of proper names.  -*- coding: utf-8 -*-
+   Copyright (C) 2006, 2008-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2006.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* INTRODUCTION
+
+   What do
+
+      Torbjörn Granlund    (coreutils)
+      François Pinard      (coreutils)
+      Danilo Šegan         (gettext)
+
+   have in common?
+
+   A non-ASCII name. This causes trouble in the --version output. The simple
+   "solution" unfortunately mutilates the name.
+
+     $ du --version | grep Granlund
+     Écrit par Torbjorn Granlund, David MacKenzie, Paul Eggert et Jim Meyering.
+
+     $ ptx --version | grep Pinard
+     Écrit par F. Pinard.
+
+   What is desirable, is to print the full name if the output character set
+   allows it, and the ASCIIfied name only as a fallback.
+
+     $ recode-sr-latin --version
+     ...
+     Written by Danilo Šegan and Bruno Haible.
+
+     $ LC_ALL=C recode-sr-latin --version
+     ...
+     Written by Danilo Segan and Bruno Haible.
+
+   The 'propername' module does exactly this. Plus, for languages that use
+   a different writing system than the Latin alphabet, it allows a translator
+   to write the name using that different writing system. In that case the
+   output will look like this:
+      <translated name> (<original name in English>)
+
+   To use the 'propername' module requires two simple steps:
+
+     1) Add it to the list of gnulib modules to import,
+
+     2) Change the arguments of version_etc(),
+
+          from "Paul Eggert"
+          to   proper_name ("Paul Eggert")
+
+          from "Torbjorn Granlund"
+          to   proper_name_utf8 ("Torbjorn Granlund", "Torbj\303\266rn Granlund")
+
+          from "F. Pinard"
+          to   proper_name_utf8 ("Franc,ois Pinard", "Fran\303\247ois Pinard")
+
+        (Optionally, here you can also add / * TRANSLATORS: ... * / comments
+        explaining how the name is written or pronounced.)
+ */
+
+#ifndef _PROPERNAME_H
+#define _PROPERNAME_H
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Return the localization of NAME.  NAME is written in ASCII.  */
+extern const char * proper_name (const char *name) /* NOT attribute const */;
+
+/* Return the localization of a name whose original writing is not ASCII.
+   NAME_UTF8 is the real name, written in UTF-8 with octal or hexadecimal
+   escape sequences.  NAME_ASCII is a fallback written only with ASCII
+   characters.  */
+extern const char * proper_name_utf8 (const char *name_ascii,
+                                      const char *name_utf8);
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* _PROPERNAME_H */
diff --git a/src/grep/lib/quote.h b/src/grep/lib/quote.h
new file mode 100644
index 0000000..3204997
--- /dev/null
+++ b/src/grep/lib/quote.h
@@ -0,0 +1,46 @@
+/* quote.h - prototypes for quote.c
+
+   Copyright (C) 1998-2001, 2003, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef QUOTE_H_
+# define QUOTE_H_ 1
+
+# include <stddef.h>
+
+/* The quoting options used by quote_n and quote.  Its type is incomplete,
+   so it's useful only in expressions like '&quote_quoting_options'.  */
+extern struct quoting_options quote_quoting_options;
+
+/* Return an unambiguous printable representation of ARG (of size
+   ARGSIZE), allocated in slot N, suitable for diagnostics.  If
+   ARGSIZE is SIZE_MAX, use the string length of the argument for
+   ARGSIZE.  */
+char const *quote_n_mem (int n, char const *arg, size_t argsize);
+
+/* Return an unambiguous printable representation of ARG (of size
+   ARGSIZE), suitable for diagnostics.  If ARGSIZE is SIZE_MAX, use
+   the string length of the argument for ARGSIZE.  */
+char const *quote_mem (char const *arg, size_t argsize);
+
+/* Return an unambiguous printable representation of ARG, allocated in
+   slot N, suitable for diagnostics.  */
+char const *quote_n (int n, char const *arg);
+
+/* Return an unambiguous printable representation of ARG, suitable for
+   diagnostics.  */
+char const *quote (char const *arg);
+
+#endif /* !QUOTE_H_ */
diff --git a/src/grep/lib/quotearg.c b/src/grep/lib/quotearg.c
new file mode 100644
index 0000000..dc4babc
--- /dev/null
+++ b/src/grep/lib/quotearg.c
@@ -0,0 +1,1081 @@
+/* quotearg.c - quote arguments for output
+
+   Copyright (C) 1998-2002, 2004-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert <eggert@twinsun.com> */
+
+/* Without this pragma, gcc 4.7.0 20111124 mistakenly suggests that
+   the quoting_options_from_style function might be candidate for
+   attribute 'pure'  */
+#if (__GNUC__ == 4 && 6 <= __GNUC_MINOR__) || 4 < __GNUC__
+# pragma GCC diagnostic ignored "-Wsuggest-attribute=pure"
+#endif
+
+#include <config.h>
+
+#include "quotearg.h"
+#include "quote.h"
+
+#include "attribute.h"
+#include "minmax.h"
+#include "xalloc.h"
+#include "c-strcaseeq.h"
+#include "localcharset.h"
+
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#include <wctype.h>
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+#define N_(msgid) msgid
+
+#ifndef SIZE_MAX
+# define SIZE_MAX ((size_t) -1)
+#endif
+
+#define INT_BITS (sizeof (int) * CHAR_BIT)
+
+struct quoting_options
+{
+  /* Basic quoting style.  */
+  enum quoting_style style;
+
+  /* Additional flags.  Bitwise combination of enum quoting_flags.  */
+  int flags;
+
+  /* Quote the characters indicated by this bit vector even if the
+     quoting style would not normally require them to be quoted.  */
+  unsigned int quote_these_too[(UCHAR_MAX / INT_BITS) + 1];
+
+  /* The left quote for custom_quoting_style.  */
+  char const *left_quote;
+
+  /* The right quote for custom_quoting_style.  */
+  char const *right_quote;
+};
+
+/* Names of quoting styles.  */
+char const *const quoting_style_args[] =
+{
+  "literal",
+  "shell",
+  "shell-always",
+  "shell-escape",
+  "shell-escape-always",
+  "c",
+  "c-maybe",
+  "escape",
+  "locale",
+  "clocale",
+  0
+};
+
+/* Correspondences to quoting style names.  */
+enum quoting_style const quoting_style_vals[] =
+{
+  literal_quoting_style,
+  shell_quoting_style,
+  shell_always_quoting_style,
+  shell_escape_quoting_style,
+  shell_escape_always_quoting_style,
+  c_quoting_style,
+  c_maybe_quoting_style,
+  escape_quoting_style,
+  locale_quoting_style,
+  clocale_quoting_style
+};
+
+/* The default quoting options.  */
+static struct quoting_options default_quoting_options;
+
+/* Allocate a new set of quoting options, with contents initially identical
+   to O if O is not null, or to the default if O is null.
+   It is the caller's responsibility to free the result.  */
+struct quoting_options *
+clone_quoting_options (struct quoting_options *o)
+{
+  int e = errno;
+  struct quoting_options *p = xmemdup (o ? o : &default_quoting_options,
+                                       sizeof *o);
+  errno = e;
+  return p;
+}
+
+/* Get the value of O's quoting style.  If O is null, use the default.  */
+enum quoting_style
+get_quoting_style (struct quoting_options const *o)
+{
+  return (o ? o : &default_quoting_options)->style;
+}
+
+/* In O (or in the default if O is null),
+   set the value of the quoting style to S.  */
+void
+set_quoting_style (struct quoting_options *o, enum quoting_style s)
+{
+  (o ? o : &default_quoting_options)->style = s;
+}
+
+/* In O (or in the default if O is null),
+   set the value of the quoting options for character C to I.
+   Return the old value.  Currently, the only values defined for I are
+   0 (the default) and 1 (which means to quote the character even if
+   it would not otherwise be quoted).  */
+int
+set_char_quoting (struct quoting_options *o, char c, int i)
+{
+  unsigned char uc = c;
+  unsigned int *p =
+    (o ? o : &default_quoting_options)->quote_these_too + uc / INT_BITS;
+  int shift = uc % INT_BITS;
+  int r = (*p >> shift) & 1;
+  *p ^= ((i & 1) ^ r) << shift;
+  return r;
+}
+
+/* In O (or in the default if O is null),
+   set the value of the quoting options flag to I, which can be a
+   bitwise combination of enum quoting_flags, or 0 for default
+   behavior.  Return the old value.  */
+int
+set_quoting_flags (struct quoting_options *o, int i)
+{
+  int r;
+  if (!o)
+    o = &default_quoting_options;
+  r = o->flags;
+  o->flags = i;
+  return r;
+}
+
+void
+set_custom_quoting (struct quoting_options *o,
+                    char const *left_quote, char const *right_quote)
+{
+  if (!o)
+    o = &default_quoting_options;
+  o->style = custom_quoting_style;
+  if (!left_quote || !right_quote)
+    abort ();
+  o->left_quote = left_quote;
+  o->right_quote = right_quote;
+}
+
+/* Return quoting options for STYLE, with no extra quoting.  */
+static struct quoting_options /* NOT PURE!! */
+quoting_options_from_style (enum quoting_style style)
+{
+  struct quoting_options o = { literal_quoting_style, 0, { 0 }, NULL, NULL };
+  if (style == custom_quoting_style)
+    abort ();
+  o.style = style;
+  return o;
+}
+
+/* MSGID approximates a quotation mark.  Return its translation if it
+   has one; otherwise, return either it or "\"", depending on S.
+
+   S is either clocale_quoting_style or locale_quoting_style.  */
+static char const *
+gettext_quote (char const *msgid, enum quoting_style s)
+{
+  char const *translation = _(msgid);
+  char const *locale_code;
+
+  if (translation != msgid)
+    return translation;
+
+  /* For UTF-8 and GB-18030, use single quotes U+2018 and U+2019.
+     Here is a list of other locales that include U+2018 and U+2019:
+
+        ISO-8859-7   0xA1                 KOI8-T       0x91
+        CP869        0x8B                 CP874        0x91
+        CP932        0x81 0x65            CP936        0xA1 0xAE
+        CP949        0xA1 0xAE            CP950        0xA1 0xA5
+        CP1250       0x91                 CP1251       0x91
+        CP1252       0x91                 CP1253       0x91
+        CP1254       0x91                 CP1255       0x91
+        CP1256       0x91                 CP1257       0x91
+        EUC-JP       0xA1 0xC6            EUC-KR       0xA1 0xAE
+        EUC-TW       0xA1 0xE4            BIG5         0xA1 0xA5
+        BIG5-HKSCS   0xA1 0xA5            EUC-CN       0xA1 0xAE
+        GBK          0xA1 0xAE            Georgian-PS  0x91
+        PT154        0x91
+
+     None of these is still in wide use; using iconv is overkill.  */
+  locale_code = locale_charset ();
+  if (STRCASEEQ (locale_code, "UTF-8", 'U','T','F','-','8',0,0,0,0))
+    return msgid[0] == '`' ? "\xe2\x80\x98": "\xe2\x80\x99";
+  if (STRCASEEQ (locale_code, "GB18030", 'G','B','1','8','0','3','0',0,0))
+    return msgid[0] == '`' ? "\xa1\ae": "\xa1\xaf";
+
+  return (s == clocale_quoting_style ? "\"" : "'");
+}
+
+/* Place into buffer BUFFER (of size BUFFERSIZE) a quoted version of
+   argument ARG (of size ARGSIZE), using QUOTING_STYLE, FLAGS, and
+   QUOTE_THESE_TOO to control quoting.
+   Terminate the output with a null character, and return the written
+   size of the output, not counting the terminating null.
+   If BUFFERSIZE is too small to store the output string, return the
+   value that would have been returned had BUFFERSIZE been large enough.
+   If ARGSIZE is SIZE_MAX, use the string length of the argument for ARGSIZE.
+
+   This function acts like quotearg_buffer (BUFFER, BUFFERSIZE, ARG,
+   ARGSIZE, O), except it breaks O into its component pieces and is
+   not careful about errno.  */
+
+static size_t
+quotearg_buffer_restyled (char *buffer, size_t buffersize,
+                          char const *arg, size_t argsize,
+                          enum quoting_style quoting_style, int flags,
+                          unsigned int const *quote_these_too,
+                          char const *left_quote,
+                          char const *right_quote)
+{
+  size_t i;
+  size_t len = 0;
+  size_t orig_buffersize = 0;
+  char const *quote_string = 0;
+  size_t quote_string_len = 0;
+  bool backslash_escapes = false;
+  bool unibyte_locale = MB_CUR_MAX == 1;
+  bool elide_outer_quotes = (flags & QA_ELIDE_OUTER_QUOTES) != 0;
+  bool pending_shell_escape_end = false;
+  bool encountered_single_quote = false;
+  bool all_c_and_shell_quote_compat = true;
+
+#define STORE(c) \
+    do \
+      { \
+        if (len < buffersize) \
+          buffer[len] = (c); \
+        len++; \
+      } \
+    while (0)
+
+#define START_ESC() \
+    do \
+      { \
+        if (elide_outer_quotes) \
+          goto force_outer_quoting_style; \
+        escaping = true; \
+        if (quoting_style == shell_always_quoting_style \
+            && ! pending_shell_escape_end) \
+          { \
+            STORE ('\''); \
+            STORE ('$'); \
+            STORE ('\''); \
+            pending_shell_escape_end = true; \
+          } \
+        STORE ('\\'); \
+      } \
+    while (0)
+
+#define END_ESC() \
+    do \
+      { \
+        if (pending_shell_escape_end && ! escaping) \
+          { \
+            STORE ('\''); \
+            STORE ('\''); \
+            pending_shell_escape_end = false; \
+          } \
+      } \
+    while (0)
+
+ process_input:
+
+  switch (quoting_style)
+    {
+    case c_maybe_quoting_style:
+      quoting_style = c_quoting_style;
+      elide_outer_quotes = true;
+      FALLTHROUGH;
+    case c_quoting_style:
+      if (!elide_outer_quotes)
+        STORE ('"');
+      backslash_escapes = true;
+      quote_string = "\"";
+      quote_string_len = 1;
+      break;
+
+    case escape_quoting_style:
+      backslash_escapes = true;
+      elide_outer_quotes = false;
+      break;
+
+    case locale_quoting_style:
+    case clocale_quoting_style:
+    case custom_quoting_style:
+      {
+        if (quoting_style != custom_quoting_style)
+          {
+            /* TRANSLATORS:
+               Get translations for open and closing quotation marks.
+               The message catalog should translate "`" to a left
+               quotation mark suitable for the locale, and similarly for
+               "'".  For example, a French Unicode local should translate
+               these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+               QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+               QUOTATION MARK), respectively.
+
+               If the catalog has no translation, we will try to
+               use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+               Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+               current locale is not Unicode, locale_quoting_style
+               will quote 'like this', and clocale_quoting_style will
+               quote "like this".  You should always include translations
+               for "`" and "'" even if U+2018 and U+2019 are appropriate
+               for your locale.
+
+               If you don't know what to put here, please see
+               <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+               and use glyphs suitable for your language.  */
+            left_quote = gettext_quote (N_("`"), quoting_style);
+            right_quote = gettext_quote (N_("'"), quoting_style);
+          }
+        if (!elide_outer_quotes)
+          for (quote_string = left_quote; *quote_string; quote_string++)
+            STORE (*quote_string);
+        backslash_escapes = true;
+        quote_string = right_quote;
+        quote_string_len = strlen (quote_string);
+      }
+      break;
+
+    case shell_escape_quoting_style:
+      backslash_escapes = true;
+      FALLTHROUGH;
+    case shell_quoting_style:
+      elide_outer_quotes = true;
+      FALLTHROUGH;
+    case shell_escape_always_quoting_style:
+      if (!elide_outer_quotes)
+        backslash_escapes = true;
+      FALLTHROUGH;
+    case shell_always_quoting_style:
+      quoting_style = shell_always_quoting_style;
+      if (!elide_outer_quotes)
+        STORE ('\'');
+      quote_string = "'";
+      quote_string_len = 1;
+      break;
+
+    case literal_quoting_style:
+      elide_outer_quotes = false;
+      break;
+
+    default:
+      abort ();
+    }
+
+  for (i = 0;  ! (argsize == SIZE_MAX ? arg[i] == '\0' : i == argsize);  i++)
+    {
+      unsigned char c;
+      unsigned char esc;
+      bool is_right_quote = false;
+      bool escaping = false;
+      bool c_and_shell_quote_compat = false;
+
+      if (backslash_escapes
+          && quoting_style != shell_always_quoting_style
+          && quote_string_len
+          && (i + quote_string_len
+              <= (argsize == SIZE_MAX && 1 < quote_string_len
+                  /* Use strlen only if we must: when argsize is SIZE_MAX,
+                     and when the quote string is more than 1 byte long.
+                     If we do call strlen, save the result.  */
+                  ? (argsize = strlen (arg)) : argsize))
+          && memcmp (arg + i, quote_string, quote_string_len) == 0)
+        {
+          if (elide_outer_quotes)
+            goto force_outer_quoting_style;
+          is_right_quote = true;
+        }
+
+      c = arg[i];
+      switch (c)
+        {
+        case '\0':
+          if (backslash_escapes)
+            {
+              START_ESC ();
+              /* If quote_string were to begin with digits, we'd need to
+                 test for the end of the arg as well.  However, it's
+                 hard to imagine any locale that would use digits in
+                 quotes, and set_custom_quoting is documented not to
+                 accept them.  Use only a single \0 with shell-escape
+                 as currently digits are not printed within $'...'  */
+              if (quoting_style != shell_always_quoting_style
+                  && i + 1 < argsize && '0' <= arg[i + 1] && arg[i + 1] <= '9')
+                {
+                  STORE ('0');
+                  STORE ('0');
+                }
+              c = '0';
+              /* We don't have to worry that this last '0' will be
+                 backslash-escaped because, again, quote_string should
+                 not start with it and because quote_these_too is
+                 documented as not accepting it.  */
+            }
+          else if (flags & QA_ELIDE_NULL_BYTES)
+            continue;
+          break;
+
+        case '?':
+          switch (quoting_style)
+            {
+            case shell_always_quoting_style:
+              if (elide_outer_quotes)
+                goto force_outer_quoting_style;
+              break;
+
+            case c_quoting_style:
+              if ((flags & QA_SPLIT_TRIGRAPHS)
+                  && i + 2 < argsize && arg[i + 1] == '?')
+                switch (arg[i + 2])
+                  {
+                  case '!': case '\'':
+                  case '(': case ')': case '-': case '/':
+                  case '<': case '=': case '>':
+                    /* Escape the second '?' in what would otherwise be
+                       a trigraph.  */
+                    if (elide_outer_quotes)
+                      goto force_outer_quoting_style;
+                    c = arg[i + 2];
+                    i += 2;
+                    STORE ('?');
+                    STORE ('"');
+                    STORE ('"');
+                    STORE ('?');
+                    break;
+
+                  default:
+                    break;
+                  }
+              break;
+
+            default:
+              break;
+            }
+          break;
+
+        case '\a': esc = 'a'; goto c_escape;
+        case '\b': esc = 'b'; goto c_escape;
+        case '\f': esc = 'f'; goto c_escape;
+        case '\n': esc = 'n'; goto c_and_shell_escape;
+        case '\r': esc = 'r'; goto c_and_shell_escape;
+        case '\t': esc = 't'; goto c_and_shell_escape;
+        case '\v': esc = 'v'; goto c_escape;
+        case '\\': esc = c;
+          /* Never need to escape '\' in shell case.  */
+          if (quoting_style == shell_always_quoting_style)
+            {
+              if (elide_outer_quotes)
+                goto force_outer_quoting_style;
+              goto store_c;
+            }
+
+          /* No need to escape the escape if we are trying to elide
+             outer quotes and nothing else is problematic.  */
+          if (backslash_escapes && elide_outer_quotes && quote_string_len)
+            goto store_c;
+
+        c_and_shell_escape:
+          if (quoting_style == shell_always_quoting_style
+              && elide_outer_quotes)
+            goto force_outer_quoting_style;
+          /* fall through */
+        c_escape:
+          if (backslash_escapes)
+            {
+              c = esc;
+              goto store_escape;
+            }
+          break;
+
+        case '{': case '}': /* sometimes special if isolated */
+          if (! (argsize == SIZE_MAX ? arg[1] == '\0' : argsize == 1))
+            break;
+          FALLTHROUGH;
+        case '#': case '~':
+          if (i != 0)
+            break;
+          FALLTHROUGH;
+        case ' ':
+          c_and_shell_quote_compat = true;
+          FALLTHROUGH;
+        case '!': /* special in bash */
+        case '"': case '$': case '&':
+        case '(': case ')': case '*': case ';':
+        case '<':
+        case '=': /* sometimes special in 0th or (with "set -k") later args */
+        case '>': case '[':
+        case '^': /* special in old /bin/sh, e.g. SunOS 4.1.4 */
+        case '`': case '|':
+          /* A shell special character.  In theory, '$' and '`' could
+             be the first bytes of multibyte characters, which means
+             we should check them with mbrtowc, but in practice this
+             doesn't happen so it's not worth worrying about.  */
+          if (quoting_style == shell_always_quoting_style
+              && elide_outer_quotes)
+            goto force_outer_quoting_style;
+          break;
+
+        case '\'':
+          encountered_single_quote = true;
+          c_and_shell_quote_compat = true;
+          if (quoting_style == shell_always_quoting_style)
+            {
+              if (elide_outer_quotes)
+                goto force_outer_quoting_style;
+
+              if (buffersize && ! orig_buffersize)
+                {
+                  /* Just scan string to see if supports a more concise
+                     representation, rather than writing a longer string
+                     but returning the length of the more concise form.  */
+                  orig_buffersize = buffersize;
+                  buffersize = 0;
+                }
+
+              STORE ('\'');
+              STORE ('\\');
+              STORE ('\'');
+              pending_shell_escape_end = false;
+            }
+          break;
+
+        case '%': case '+': case ',': case '-': case '.': case '/':
+        case '0': case '1': case '2': case '3': case '4': case '5':
+        case '6': case '7': case '8': case '9': case ':':
+        case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
+        case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
+        case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
+        case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
+        case 'Y': case 'Z': case ']': case '_': case 'a': case 'b':
+        case 'c': case 'd': case 'e': case 'f': case 'g': case 'h':
+        case 'i': case 'j': case 'k': case 'l': case 'm': case 'n':
+        case 'o': case 'p': case 'q': case 'r': case 's': case 't':
+        case 'u': case 'v': case 'w': case 'x': case 'y': case 'z':
+          /* These characters don't cause problems, no matter what the
+             quoting style is.  They cannot start multibyte sequences.
+             A digit or a special letter would cause trouble if it
+             appeared at the beginning of quote_string because we'd then
+             escape by prepending a backslash.  However, it's hard to
+             imagine any locale that would use digits or letters as
+             quotes, and set_custom_quoting is documented not to accept
+             them.  Also, a digit or a special letter would cause
+             trouble if it appeared in quote_these_too, but that's also
+             documented as not accepting them.  */
+          c_and_shell_quote_compat = true;
+          break;
+
+        default:
+          /* If we have a multibyte sequence, copy it until we reach
+             its end, find an error, or come back to the initial shift
+             state.  For C-like styles, if the sequence has
+             unprintable characters, escape the whole sequence, since
+             we can't easily escape single characters within it.  */
+          {
+            /* Length of multibyte sequence found so far.  */
+            size_t m;
+
+            bool printable;
+
+            if (unibyte_locale)
+              {
+                m = 1;
+                printable = isprint (c) != 0;
+              }
+            else
+              {
+                mbstate_t mbstate;
+                memset (&mbstate, 0, sizeof mbstate);
+
+                m = 0;
+                printable = true;
+                if (argsize == SIZE_MAX)
+                  argsize = strlen (arg);
+
+                do
+                  {
+                    wchar_t w;
+                    size_t bytes = mbrtowc (&w, &arg[i + m],
+                                            argsize - (i + m), &mbstate);
+                    if (bytes == 0)
+                      break;
+                    else if (bytes == (size_t) -1)
+                      {
+                        printable = false;
+                        break;
+                      }
+                    else if (bytes == (size_t) -2)
+                      {
+                        printable = false;
+                        while (i + m < argsize && arg[i + m])
+                          m++;
+                        break;
+                      }
+                    else
+                      {
+                        /* Work around a bug with older shells that "see" a '\'
+                           that is really the 2nd byte of a multibyte character.
+                           In practice the problem is limited to ASCII
+                           chars >= '@' that are shell special chars.  */
+                        if ('[' == 0x5b && elide_outer_quotes
+                            && quoting_style == shell_always_quoting_style)
+                          {
+                            size_t j;
+                            for (j = 1; j < bytes; j++)
+                              switch (arg[i + m + j])
+                                {
+                                case '[': case '\\': case '^':
+                                case '`': case '|':
+                                  goto force_outer_quoting_style;
+
+                                default:
+                                  break;
+                                }
+                          }
+
+                        if (! iswprint (w))
+                          printable = false;
+                        m += bytes;
+                      }
+                  }
+                while (! mbsinit (&mbstate));
+              }
+
+            c_and_shell_quote_compat = printable;
+
+            if (1 < m || (backslash_escapes && ! printable))
+              {
+                /* Output a multibyte sequence, or an escaped
+                   unprintable unibyte character.  */
+                size_t ilim = i + m;
+
+                for (;;)
+                  {
+                    if (backslash_escapes && ! printable)
+                      {
+                        START_ESC ();
+                        STORE ('0' + (c >> 6));
+                        STORE ('0' + ((c >> 3) & 7));
+                        c = '0' + (c & 7);
+                      }
+                    else if (is_right_quote)
+                      {
+                        STORE ('\\');
+                        is_right_quote = false;
+                      }
+                    if (ilim <= i + 1)
+                      break;
+                    END_ESC ();
+                    STORE (c);
+                    c = arg[++i];
+                  }
+
+                goto store_c;
+              }
+          }
+        }
+
+      if (! (((backslash_escapes && quoting_style != shell_always_quoting_style)
+              || elide_outer_quotes)
+             && quote_these_too
+             && quote_these_too[c / INT_BITS] >> (c % INT_BITS) & 1)
+          && !is_right_quote)
+        goto store_c;
+
+    store_escape:
+      START_ESC ();
+
+    store_c:
+      END_ESC ();
+      STORE (c);
+
+      if (! c_and_shell_quote_compat)
+        all_c_and_shell_quote_compat = false;
+    }
+
+  if (len == 0 && quoting_style == shell_always_quoting_style
+      && elide_outer_quotes)
+    goto force_outer_quoting_style;
+
+  /* Single shell quotes (') are commonly enough used as an apostrophe,
+     that we attempt to minimize the quoting in this case.  Note itʼs
+     better to use the apostrophe modifier "\u02BC" if possible, as that
+     renders better and works with the word match regex \W+ etc.  */
+  if (quoting_style == shell_always_quoting_style && ! elide_outer_quotes
+      && encountered_single_quote)
+    {
+      if (all_c_and_shell_quote_compat)
+        return quotearg_buffer_restyled (buffer, orig_buffersize, arg, argsize,
+                                         c_quoting_style,
+                                         flags, quote_these_too,
+                                         left_quote, right_quote);
+      else if (! buffersize && orig_buffersize)
+        {
+          /* Disable read-only scan, and reprocess to write quoted string.  */
+          buffersize = orig_buffersize;
+          len = 0;
+          goto process_input;
+        }
+    }
+
+  if (quote_string && !elide_outer_quotes)
+    for (; *quote_string; quote_string++)
+      STORE (*quote_string);
+
+  if (len < buffersize)
+    buffer[len] = '\0';
+  return len;
+
+ force_outer_quoting_style:
+  /* Don't reuse quote_these_too, since the addition of outer quotes
+     sufficiently quotes the specified characters.  */
+  if (quoting_style == shell_always_quoting_style && backslash_escapes)
+    quoting_style = shell_escape_always_quoting_style;
+  return quotearg_buffer_restyled (buffer, buffersize, arg, argsize,
+                                   quoting_style,
+                                   flags & ~QA_ELIDE_OUTER_QUOTES, NULL,
+                                   left_quote, right_quote);
+}
+
+/* Place into buffer BUFFER (of size BUFFERSIZE) a quoted version of
+   argument ARG (of size ARGSIZE), using O to control quoting.
+   If O is null, use the default.
+   Terminate the output with a null character, and return the written
+   size of the output, not counting the terminating null.
+   If BUFFERSIZE is too small to store the output string, return the
+   value that would have been returned had BUFFERSIZE been large enough.
+   If ARGSIZE is SIZE_MAX, use the string length of the argument for
+   ARGSIZE.  */
+size_t
+quotearg_buffer (char *buffer, size_t buffersize,
+                 char const *arg, size_t argsize,
+                 struct quoting_options const *o)
+{
+  struct quoting_options const *p = o ? o : &default_quoting_options;
+  int e = errno;
+  size_t r = quotearg_buffer_restyled (buffer, buffersize, arg, argsize,
+                                       p->style, p->flags, p->quote_these_too,
+                                       p->left_quote, p->right_quote);
+  errno = e;
+  return r;
+}
+
+char *
+quotearg_alloc (char const *arg, size_t argsize,
+                struct quoting_options const *o)
+{
+  return quotearg_alloc_mem (arg, argsize, NULL, o);
+}
+
+/* Like quotearg_buffer (..., ARG, ARGSIZE, O), except return newly
+   allocated storage containing the quoted string, and store the
+   resulting size into *SIZE, if non-NULL.  The result can contain
+   embedded null bytes only if ARGSIZE is not SIZE_MAX, SIZE is not
+   NULL, and set_quoting_flags has not set the null byte elision
+   flag.  */
+char *
+quotearg_alloc_mem (char const *arg, size_t argsize, size_t *size,
+                    struct quoting_options const *o)
+{
+  struct quoting_options const *p = o ? o : &default_quoting_options;
+  int e = errno;
+  /* Elide embedded null bytes if we can't return a size.  */
+  int flags = p->flags | (size ? 0 : QA_ELIDE_NULL_BYTES);
+  size_t bufsize = quotearg_buffer_restyled (0, 0, arg, argsize, p->style,
+                                             flags, p->quote_these_too,
+                                             p->left_quote,
+                                             p->right_quote) + 1;
+  char *buf = xcharalloc (bufsize);
+  quotearg_buffer_restyled (buf, bufsize, arg, argsize, p->style, flags,
+                            p->quote_these_too,
+                            p->left_quote, p->right_quote);
+  errno = e;
+  if (size)
+    *size = bufsize - 1;
+  return buf;
+}
+
+/* A storage slot with size and pointer to a value.  */
+struct slotvec
+{
+  size_t size;
+  char *val;
+};
+
+/* Preallocate a slot 0 buffer, so that the caller can always quote
+   one small component of a "memory exhausted" message in slot 0.  */
+static char slot0[256];
+static int nslots = 1;
+static struct slotvec slotvec0 = {sizeof slot0, slot0};
+static struct slotvec *slotvec = &slotvec0;
+
+void
+quotearg_free (void)
+{
+  struct slotvec *sv = slotvec;
+  int i;
+  for (i = 1; i < nslots; i++)
+    free (sv[i].val);
+  if (sv[0].val != slot0)
+    {
+      free (sv[0].val);
+      slotvec0.size = sizeof slot0;
+      slotvec0.val = slot0;
+    }
+  if (sv != &slotvec0)
+    {
+      free (sv);
+      slotvec = &slotvec0;
+    }
+  nslots = 1;
+}
+
+/* Use storage slot N to return a quoted version of argument ARG.
+   ARG is of size ARGSIZE, but if that is SIZE_MAX, ARG is a
+   null-terminated string.
+   OPTIONS specifies the quoting options.
+   The returned value points to static storage that can be
+   reused by the next call to this function with the same value of N.
+   N must be nonnegative; it is typically small, and must be
+   less than MIN (INT_MAX, IDX_MAX).  The type of N is signed
+   to allow for future extensions (using negative values).  */
+static char *
+quotearg_n_options (int n, char const *arg, size_t argsize,
+                    struct quoting_options const *options)
+{
+  int e = errno;
+
+  struct slotvec *sv = slotvec;
+
+  int nslots_max = MIN (INT_MAX, IDX_MAX);
+  if (! (0 <= n && n < nslots_max))
+    abort ();
+
+  if (nslots <= n)
+    {
+      bool preallocated = (sv == &slotvec0);
+      idx_t new_nslots = nslots;
+
+      slotvec = sv = xpalloc (preallocated ? NULL : sv, &new_nslots,
+                              n - nslots + 1, nslots_max, sizeof *sv);
+      if (preallocated)
+        *sv = slotvec0;
+      memset (sv + nslots, 0, (new_nslots - nslots) * sizeof *sv);
+      nslots = new_nslots;
+    }
+
+  {
+    size_t size = sv[n].size;
+    char *val = sv[n].val;
+    /* Elide embedded null bytes since we don't return a size.  */
+    int flags = options->flags | QA_ELIDE_NULL_BYTES;
+    size_t qsize = quotearg_buffer_restyled (val, size, arg, argsize,
+                                             options->style, flags,
+                                             options->quote_these_too,
+                                             options->left_quote,
+                                             options->right_quote);
+
+    if (size <= qsize)
+      {
+        sv[n].size = size = qsize + 1;
+        if (val != slot0)
+          free (val);
+        sv[n].val = val = xcharalloc (size);
+        quotearg_buffer_restyled (val, size, arg, argsize, options->style,
+                                  flags, options->quote_these_too,
+                                  options->left_quote,
+                                  options->right_quote);
+      }
+
+    errno = e;
+    return val;
+  }
+}
+
+char *
+quotearg_n (int n, char const *arg)
+{
+  return quotearg_n_options (n, arg, SIZE_MAX, &default_quoting_options);
+}
+
+char *
+quotearg_n_mem (int n, char const *arg, size_t argsize)
+{
+  return quotearg_n_options (n, arg, argsize, &default_quoting_options);
+}
+
+char *
+quotearg (char const *arg)
+{
+  return quotearg_n (0, arg);
+}
+
+char *
+quotearg_mem (char const *arg, size_t argsize)
+{
+  return quotearg_n_mem (0, arg, argsize);
+}
+
+char *
+quotearg_n_style (int n, enum quoting_style s, char const *arg)
+{
+  struct quoting_options const o = quoting_options_from_style (s);
+  return quotearg_n_options (n, arg, SIZE_MAX, &o);
+}
+
+char *
+quotearg_n_style_mem (int n, enum quoting_style s,
+                      char const *arg, size_t argsize)
+{
+  struct quoting_options const o = quoting_options_from_style (s);
+  return quotearg_n_options (n, arg, argsize, &o);
+}
+
+char *
+quotearg_style (enum quoting_style s, char const *arg)
+{
+  return quotearg_n_style (0, s, arg);
+}
+
+char *
+quotearg_style_mem (enum quoting_style s, char const *arg, size_t argsize)
+{
+  return quotearg_n_style_mem (0, s, arg, argsize);
+}
+
+char *
+quotearg_char_mem (char const *arg, size_t argsize, char ch)
+{
+  struct quoting_options options;
+  options = default_quoting_options;
+  set_char_quoting (&options, ch, 1);
+  return quotearg_n_options (0, arg, argsize, &options);
+}
+
+char *
+quotearg_char (char const *arg, char ch)
+{
+  return quotearg_char_mem (arg, SIZE_MAX, ch);
+}
+
+char *
+quotearg_colon (char const *arg)
+{
+  return quotearg_char (arg, ':');
+}
+
+char *
+quotearg_colon_mem (char const *arg, size_t argsize)
+{
+  return quotearg_char_mem (arg, argsize, ':');
+}
+
+char *
+quotearg_n_style_colon (int n, enum quoting_style s, char const *arg)
+{
+  struct quoting_options options;
+  options = quoting_options_from_style (s);
+  set_char_quoting (&options, ':', 1);
+  return quotearg_n_options (n, arg, SIZE_MAX, &options);
+}
+
+char *
+quotearg_n_custom (int n, char const *left_quote,
+                   char const *right_quote, char const *arg)
+{
+  return quotearg_n_custom_mem (n, left_quote, right_quote, arg,
+                                SIZE_MAX);
+}
+
+char *
+quotearg_n_custom_mem (int n, char const *left_quote,
+                       char const *right_quote,
+                       char const *arg, size_t argsize)
+{
+  struct quoting_options o = default_quoting_options;
+  set_custom_quoting (&o, left_quote, right_quote);
+  return quotearg_n_options (n, arg, argsize, &o);
+}
+
+char *
+quotearg_custom (char const *left_quote, char const *right_quote,
+                 char const *arg)
+{
+  return quotearg_n_custom (0, left_quote, right_quote, arg);
+}
+
+char *
+quotearg_custom_mem (char const *left_quote, char const *right_quote,
+                     char const *arg, size_t argsize)
+{
+  return quotearg_n_custom_mem (0, left_quote, right_quote, arg,
+                                argsize);
+}
+
+
+/* The quoting option used by the functions of quote.h.  */
+struct quoting_options quote_quoting_options =
+  {
+    locale_quoting_style,
+    0,
+    { 0 },
+    NULL, NULL
+  };
+
+char const *
+quote_n_mem (int n, char const *arg, size_t argsize)
+{
+  return quotearg_n_options (n, arg, argsize, &quote_quoting_options);
+}
+
+char const *
+quote_mem (char const *arg, size_t argsize)
+{
+  return quote_n_mem (0, arg, argsize);
+}
+
+char const *
+quote_n (int n, char const *arg)
+{
+  return quote_n_mem (n, arg, SIZE_MAX);
+}
+
+char const *
+quote (char const *arg)
+{
+  return quote_n (0, arg);
+}
+
+/*
+ * Hey Emacs!
+ * Local Variables:
+ * coding: utf-8
+ * End:
+ */
diff --git a/src/grep/lib/quotearg.h b/src/grep/lib/quotearg.h
new file mode 100644
index 0000000..f5644b8
--- /dev/null
+++ b/src/grep/lib/quotearg.h
@@ -0,0 +1,431 @@
+/* quotearg.h - quote arguments for output
+
+   Copyright (C) 1998-2002, 2004, 2006, 2008-2021 Free Software Foundation,
+   Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert <eggert@twinsun.com> */
+
+#ifndef QUOTEARG_H_
+# define QUOTEARG_H_ 1
+
+# include <stdlib.h>
+
+/* Basic quoting styles.  For each style, an example is given on the
+   input strings "simple", "\0 \t\n'\"\033?""?/\\", and "a:b", using
+   quotearg_buffer, quotearg_mem, and quotearg_colon_mem with that
+   style and the default flags and quoted characters.  Note that the
+   examples are shown here as valid C strings rather than what
+   displays on a terminal (with "??/" as a trigraph for "\\").  */
+enum quoting_style
+  {
+    /* Output names as-is (ls --quoting-style=literal).  Can result in
+       embedded null bytes if QA_ELIDE_NULL_BYTES is not in
+       effect.
+
+       quotearg_buffer:
+       "simple", "\0 \t\n'\"\033??/\\", "a:b"
+       quotearg:
+       "simple", " \t\n'\"\033??/\\", "a:b"
+       quotearg_colon:
+       "simple", " \t\n'\"\033??/\\", "a:b"
+    */
+    literal_quoting_style,
+
+    /* Quote names for the shell if they contain shell metacharacters
+       or would cause ambiguous output (ls --quoting-style=shell).
+       Can result in embedded null bytes if QA_ELIDE_NULL_BYTES is not
+       in effect.
+
+       quotearg_buffer:
+       "simple", "'\0 \t\n'\\''\"\033??/\\'", "a:b"
+       quotearg:
+       "simple", "' \t\n'\\''\"\033??/\\'", "a:b"
+       quotearg_colon:
+       "simple", "' \t\n'\\''\"\033??/\\'", "'a:b'"
+    */
+    shell_quoting_style,
+
+    /* Quote names for the shell, even if they would normally not
+       require quoting (ls --quoting-style=shell-always).  Can result
+       in embedded null bytes if QA_ELIDE_NULL_BYTES is not in effect.
+       Behaves like shell_quoting_style if QA_ELIDE_OUTER_QUOTES is in
+       effect.
+
+       quotearg_buffer:
+       "'simple'", "'\0 \t\n'\\''\"\033??/\\'", "'a:b'"
+       quotearg:
+       "'simple'", "' \t\n'\\''\"\033??/\\'", "'a:b'"
+       quotearg_colon:
+       "'simple'", "' \t\n'\\''\"\033??/\\'", "'a:b'"
+    */
+    shell_always_quoting_style,
+
+    /* Quote names for the shell if they contain shell metacharacters
+       or other problematic characters (ls --quoting-style=shell-escape).
+       Non printable characters are quoted using the $'...' syntax,
+       which originated in ksh93 and is widely supported by most shells,
+       and proposed for inclusion in POSIX.
+
+       quotearg_buffer:
+       "simple", "''$'\\0'' '$'\\t\\n'\\''\"'$'\\033''??/\\'", "a:b"
+       quotearg:
+       "simple", "''$'\\0'' '$'\\t\\n'\\''\"'$'\\033''??/\\'", "a:b"
+       quotearg_colon:
+       "simple", "''$'\\0'' '$'\\t\\n'\\''\"'$'\\033''??/\\'", "'a:b'"
+    */
+    shell_escape_quoting_style,
+
+    /* Quote names for the shell even if they would normally not
+       require quoting (ls --quoting-style=shell-escape).
+       Non printable characters are quoted using the $'...' syntax,
+       which originated in ksh93 and is widely supported by most shells,
+       and proposed for inclusion in POSIX.  Behaves like
+       shell_escape_quoting_style if QA_ELIDE_OUTER_QUOTES is in effect.
+
+       quotearg_buffer:
+       "simple", "''$'\\0'' '$'\\t\\n'\\''\"'$'\\033''??/\'", "a:b"
+       quotearg:
+       "simple", "''$'\\0'' '$'\\t\\n'\\''\"'$'\\033''??/\'", "a:b"
+       quotearg_colon:
+       "simple", "''$'\\0'' '$'\\t\\n'\\''\"'$'\\033''??/\'", "'a:b'"
+    */
+    shell_escape_always_quoting_style,
+
+    /* Quote names as for a C language string (ls --quoting-style=c).
+       Behaves like c_maybe_quoting_style if QA_ELIDE_OUTER_QUOTES is
+       in effect.  Split into consecutive strings if
+       QA_SPLIT_TRIGRAPHS.
+
+       quotearg_buffer:
+       "\"simple\"", "\"\\0 \\t\\n'\\\"\\033??/\\\\\"", "\"a:b\""
+       quotearg:
+       "\"simple\"", "\"\\0 \\t\\n'\\\"\\033??/\\\\\"", "\"a:b\""
+       quotearg_colon:
+       "\"simple\"", "\"\\0 \\t\\n'\\\"\\033??/\\\\\"", "\"a\\:b\""
+    */
+    c_quoting_style,
+
+    /* Like c_quoting_style except omit the surrounding double-quote
+       characters if no quoted characters are encountered.
+
+       quotearg_buffer:
+       "simple", "\"\\0 \\t\\n'\\\"\\033??/\\\\\"", "a:b"
+       quotearg:
+       "simple", "\"\\0 \\t\\n'\\\"\\033??/\\\\\"", "a:b"
+       quotearg_colon:
+       "simple", "\"\\0 \\t\\n'\\\"\\033??/\\\\\"", "\"a:b\""
+    */
+    c_maybe_quoting_style,
+
+    /* Like c_quoting_style except always omit the surrounding
+       double-quote characters and ignore QA_SPLIT_TRIGRAPHS
+       (ls --quoting-style=escape).
+
+       quotearg_buffer:
+       "simple", "\\0 \\t\\n'\"\\033??/\\\\", "a:b"
+       quotearg:
+       "simple", "\\0 \\t\\n'\"\\033??/\\\\", "a:b"
+       quotearg_colon:
+       "simple", "\\0 \\t\\n'\"\\033??/\\\\", "a\\:b"
+    */
+    escape_quoting_style,
+
+    /* Like clocale_quoting_style, but use single quotes in the
+       default C locale or if the program does not use gettext
+       (ls --quoting-style=locale).  For UTF-8 locales, quote
+       characters will use Unicode.
+
+       LC_MESSAGES=C
+       quotearg_buffer:
+       "`simple'", "`\\0 \\t\\n\\'\"\\033??/\\\\'", "`a:b'"
+       quotearg:
+       "`simple'", "`\\0 \\t\\n\\'\"\\033??/\\\\'", "`a:b'"
+       quotearg_colon:
+       "`simple'", "`\\0 \\t\\n\\'\"\\033??/\\\\'", "`a\\:b'"
+
+       LC_MESSAGES=pt_PT.utf8
+       quotearg_buffer:
+       "\302\253simple\302\273",
+       "\302\253\\0 \\t\\n'\"\\033??/\\\\\302\253", "\302\253a:b\302\273"
+       quotearg:
+       "\302\253simple\302\273",
+       "\302\253\\0 \\t\\n'\"\\033??/\\\\\302\253", "\302\253a:b\302\273"
+       quotearg_colon:
+       "\302\253simple\302\273",
+       "\302\253\\0 \\t\\n'\"\\033??/\\\\\302\253", "\302\253a\\:b\302\273"
+    */
+    locale_quoting_style,
+
+    /* Like c_quoting_style except use quotation marks appropriate for
+       the locale and ignore QA_SPLIT_TRIGRAPHS
+       (ls --quoting-style=clocale).
+
+       LC_MESSAGES=C
+       quotearg_buffer:
+       "\"simple\"", "\"\\0 \\t\\n'\\\"\\033??/\\\\\"", "\"a:b\""
+       quotearg:
+       "\"simple\"", "\"\\0 \\t\\n'\\\"\\033??/\\\\\"", "\"a:b\""
+       quotearg_colon:
+       "\"simple\"", "\"\\0 \\t\\n'\\\"\\033??/\\\\\"", "\"a\\:b\""
+
+       LC_MESSAGES=pt_PT.utf8
+       quotearg_buffer:
+       "\302\253simple\302\273",
+       "\302\253\\0 \\t\\n'\"\\033??/\\\\\302\253", "\302\253a:b\302\273"
+       quotearg:
+       "\302\253simple\302\273",
+       "\302\253\\0 \\t\\n'\"\\033??/\\\\\302\253", "\302\253a:b\302\273"
+       quotearg_colon:
+       "\302\253simple\302\273",
+       "\302\253\\0 \\t\\n'\"\\033??/\\\\\302\253", "\302\253a\\:b\302\273"
+    */
+    clocale_quoting_style,
+
+    /* Like clocale_quoting_style except use the custom quotation marks
+       set by set_custom_quoting.  If custom quotation marks are not
+       set, the behavior is undefined.
+
+       left_quote = right_quote = "'"
+       quotearg_buffer:
+       "'simple'", "'\\0 \\t\\n\\'\"\\033??/\\\\'", "'a:b'"
+       quotearg:
+       "'simple'", "'\\0 \\t\\n\\'\"\\033??/\\\\'", "'a:b'"
+       quotearg_colon:
+       "'simple'", "'\\0 \\t\\n\\'\"\\033??/\\\\'", "'a\\:b'"
+
+       left_quote = "(" and right_quote = ")"
+       quotearg_buffer:
+       "(simple)", "(\\0 \\t\\n'\"\\033??/\\\\)", "(a:b)"
+       quotearg:
+       "(simple)", "(\\0 \\t\\n'\"\\033??/\\\\)", "(a:b)"
+       quotearg_colon:
+       "(simple)", "(\\0 \\t\\n'\"\\033??/\\\\)", "(a\\:b)"
+
+       left_quote = ":" and right_quote = " "
+       quotearg_buffer:
+       ":simple ", ":\\0\\ \\t\\n'\"\\033??/\\\\ ", ":a:b "
+       quotearg:
+       ":simple ", ":\\0\\ \\t\\n'\"\\033??/\\\\ ", ":a:b "
+       quotearg_colon:
+       ":simple ", ":\\0\\ \\t\\n'\"\\033??/\\\\ ", ":a\\:b "
+
+       left_quote = "\"'" and right_quote = "'\""
+       Notice that this is treated as a single level of quotes or two
+       levels where the outer quote need not be escaped within the inner
+       quotes.  For two levels where the outer quote must be escaped
+       within the inner quotes, you must use separate quotearg
+       invocations.
+       quotearg_buffer:
+       "\"'simple'\"", "\"'\\0 \\t\\n\\'\"\\033??/\\\\'\"", "\"'a:b'\""
+       quotearg:
+       "\"'simple'\"", "\"'\\0 \\t\\n\\'\"\\033??/\\\\'\"", "\"'a:b'\""
+       quotearg_colon:
+       "\"'simple'\"", "\"'\\0 \\t\\n\\'\"\\033??/\\\\'\"", "\"'a\\:b'\""
+    */
+    custom_quoting_style
+  };
+
+/* Flags for use in set_quoting_flags.  */
+enum quoting_flags
+  {
+    /* Always elide null bytes from styles that do not quote them,
+       even when the length of the result is available to the
+       caller.  */
+    QA_ELIDE_NULL_BYTES = 0x01,
+
+    /* Omit the surrounding quote characters if no escaped characters
+       are encountered.  Note that if no other character needs
+       escaping, then neither does the escape character.  */
+    QA_ELIDE_OUTER_QUOTES = 0x02,
+
+    /* In the c_quoting_style and c_maybe_quoting_style, split ANSI
+       trigraph sequences into concatenated strings (for example,
+       "?""?/" rather than "??/", which could be confused with
+       "\\").  */
+    QA_SPLIT_TRIGRAPHS = 0x04
+  };
+
+/* For now, --quoting-style=literal is the default, but this may change.  */
+# ifndef DEFAULT_QUOTING_STYLE
+#  define DEFAULT_QUOTING_STYLE literal_quoting_style
+# endif
+
+/* Names of quoting styles and their corresponding values.  */
+extern char const *const quoting_style_args[];
+extern enum quoting_style const quoting_style_vals[];
+
+struct quoting_options;
+
+/* The functions listed below set and use a hidden variable
+   that contains the default quoting style options.  */
+
+/* Allocate a new set of quoting options, with contents initially identical
+   to O if O is not null, or to the default if O is null.
+   It is the caller's responsibility to free the result.  */
+struct quoting_options *clone_quoting_options (struct quoting_options *o)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_RETURNS_NONNULL;
+
+/* Get the value of O's quoting style.  If O is null, use the default.  */
+enum quoting_style get_quoting_style (struct quoting_options const *o);
+
+/* In O (or in the default if O is null),
+   set the value of the quoting style to S.  */
+void set_quoting_style (struct quoting_options *o, enum quoting_style s);
+
+/* In O (or in the default if O is null),
+   set the value of the quoting options for character C to I.
+   Return the old value.  Currently, the only values defined for I are
+   0 (the default) and 1 (which means to quote the character even if
+   it would not otherwise be quoted).  C must never be a digit or a
+   letter that has special meaning after a backslash (for example, "\t"
+   for tab).  */
+int set_char_quoting (struct quoting_options *o, char c, int i);
+
+/* In O (or in the default if O is null),
+   set the value of the quoting options flag to I, which can be a
+   bitwise combination of enum quoting_flags, or 0 for default
+   behavior.  Return the old value.  */
+int set_quoting_flags (struct quoting_options *o, int i);
+
+/* In O (or in the default if O is null),
+   set the value of the quoting style to custom_quoting_style,
+   set the left quote to LEFT_QUOTE, and set the right quote to
+   RIGHT_QUOTE.  Each of LEFT_QUOTE and RIGHT_QUOTE must be
+   null-terminated and can be the empty string.  Because backslashes are
+   used for escaping, it does not make sense for RIGHT_QUOTE to contain
+   a backslash.  RIGHT_QUOTE must not begin with a digit or a letter
+   that has special meaning after a backslash (for example, "\t" for
+   tab).  */
+void set_custom_quoting (struct quoting_options *o,
+                         char const *left_quote,
+                         char const *right_quote);
+
+/* Place into buffer BUFFER (of size BUFFERSIZE) a quoted version of
+   argument ARG (of size ARGSIZE), using O to control quoting.
+   If O is null, use the default.
+   Terminate the output with a null character, and return the written
+   size of the output, not counting the terminating null.
+   If BUFFERSIZE is too small to store the output string, return the
+   value that would have been returned had BUFFERSIZE been large enough.
+   If ARGSIZE is -1, use the string length of the argument for ARGSIZE.
+   On output, BUFFER might contain embedded null bytes if ARGSIZE was
+   not -1, the style of O does not use backslash escapes, and the
+   flags of O do not request elision of null bytes.*/
+size_t quotearg_buffer (char *restrict buffer, size_t buffersize,
+                        char const *arg, size_t argsize,
+                        struct quoting_options const *o);
+
+/* Like quotearg_buffer, except return the result in a newly allocated
+   buffer.  It is the caller's responsibility to free the result.  The
+   result will not contain embedded null bytes.  */
+char *quotearg_alloc (char const *arg, size_t argsize,
+                      struct quoting_options const *o)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_RETURNS_NONNULL;
+
+/* Like quotearg_alloc, except that the length of the result,
+   excluding the terminating null byte, is stored into SIZE if it is
+   non-NULL.  The result might contain embedded null bytes if ARGSIZE
+   was not -1, SIZE was not NULL, the style of O does not use
+   backslash escapes, and the flags of O do not request elision of
+   null bytes.*/
+char *quotearg_alloc_mem (char const *arg, size_t argsize,
+                          size_t *size, struct quoting_options const *o)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_RETURNS_NONNULL;
+
+/* Use storage slot N to return a quoted version of the string ARG.
+   Use the default quoting options.
+   The returned value points to static storage that can be
+   reused by the next call to this function with the same value of N.
+   N must be nonnegative.  The output of all functions in the
+   quotearg_n family are guaranteed to not contain embedded null
+   bytes.*/
+char *quotearg_n (int n, char const *arg);
+
+/* Equivalent to quotearg_n (0, ARG).  */
+char *quotearg (char const *arg);
+
+/* Use storage slot N to return a quoted version of the argument ARG
+   of size ARGSIZE.  This is like quotearg_n (N, ARG), except it can
+   quote null bytes.  */
+char *quotearg_n_mem (int n, char const *arg, size_t argsize);
+
+/* Equivalent to quotearg_n_mem (0, ARG, ARGSIZE).  */
+char *quotearg_mem (char const *arg, size_t argsize);
+
+/* Use style S and storage slot N to return a quoted version of the string ARG.
+   This is like quotearg_n (N, ARG), except that it uses S with no other
+   options to specify the quoting method.  */
+char *quotearg_n_style (int n, enum quoting_style s, char const *arg);
+
+/* Use style S and storage slot N to return a quoted version of the
+   argument ARG of size ARGSIZE.  This is like quotearg_n_style
+   (N, S, ARG), except it can quote null bytes.  */
+char *quotearg_n_style_mem (int n, enum quoting_style s,
+                            char const *arg, size_t argsize);
+
+/* Equivalent to quotearg_n_style (0, S, ARG).  */
+char *quotearg_style (enum quoting_style s, char const *arg);
+
+/* Equivalent to quotearg_n_style_mem (0, S, ARG, ARGSIZE).  */
+char *quotearg_style_mem (enum quoting_style s,
+                          char const *arg, size_t argsize);
+
+/* Like quotearg (ARG), except also quote any instances of CH.
+   See set_char_quoting for a description of acceptable CH values.  */
+char *quotearg_char (char const *arg, char ch);
+
+/* Like quotearg_char (ARG, CH), except it can quote null bytes.  */
+char *quotearg_char_mem (char const *arg, size_t argsize, char ch);
+
+/* Equivalent to quotearg_char (ARG, ':').  */
+char *quotearg_colon (char const *arg);
+
+/* Like quotearg_colon (ARG), except it can quote null bytes.  */
+char *quotearg_colon_mem (char const *arg, size_t argsize);
+
+/* Like quotearg_n_style, except with ':' quoting enabled.  */
+char *quotearg_n_style_colon (int n, enum quoting_style s, char const *arg);
+
+/* Like quotearg_n_style (N, S, ARG) but with S as custom_quoting_style
+   with left quote as LEFT_QUOTE and right quote as RIGHT_QUOTE.  See
+   set_custom_quoting for a description of acceptable LEFT_QUOTE and
+   RIGHT_QUOTE values.  */
+char *quotearg_n_custom (int n, char const *left_quote,
+                         char const *right_quote, char const *arg);
+
+/* Like quotearg_n_custom (N, LEFT_QUOTE, RIGHT_QUOTE, ARG) except it
+   can quote null bytes.  */
+char *quotearg_n_custom_mem (int n, char const *left_quote,
+                             char const *right_quote,
+                             char const *arg, size_t argsize);
+
+/* Equivalent to quotearg_n_custom (0, LEFT_QUOTE, RIGHT_QUOTE, ARG).  */
+char *quotearg_custom (char const *left_quote, char const *right_quote,
+                       char const *arg);
+
+/* Equivalent to quotearg_n_custom_mem (0, LEFT_QUOTE, RIGHT_QUOTE, ARG,
+                                        ARGSIZE).  */
+char *quotearg_custom_mem (char const *left_quote,
+                           char const *right_quote,
+                           char const *arg, size_t argsize);
+
+/* Free any dynamically allocated memory.  */
+void quotearg_free (void);
+
+#endif /* !QUOTEARG_H_ */
diff --git a/src/grep/lib/raise.c b/src/grep/lib/raise.c
new file mode 100644
index 0000000..37c100d
--- /dev/null
+++ b/src/grep/lib/raise.c
@@ -0,0 +1,83 @@
+/* Provide a non-threads replacement for the POSIX raise function.
+
+   Copyright (C) 2002-2003, 2005-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering and Bruno Haible */
+
+#include <config.h>
+
+/* Specification.  */
+#include <signal.h>
+
+#if HAVE_RAISE
+/* Native Windows platform.  */
+
+# include <errno.h>
+
+# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+#  include "msvc-inval.h"
+# endif
+
+# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+/* Forward declaration.  */
+static int raise_nothrow (int sig);
+# else
+#  define raise_nothrow raise
+# endif
+
+#else
+/* An old Unix platform.  */
+
+# include <unistd.h>
+
+#endif
+
+int
+raise (int sig)
+#undef raise
+{
+#if GNULIB_defined_signal_blocking && GNULIB_defined_SIGPIPE
+  if (sig == SIGPIPE)
+    return _gl_raise_SIGPIPE ();
+#endif
+
+#if HAVE_RAISE
+  return raise_nothrow (sig);
+#else
+  return kill (getpid (), sig);
+#endif
+}
+
+#if HAVE_RAISE && HAVE_MSVC_INVALID_PARAMETER_HANDLER
+static int
+raise_nothrow (int sig)
+{
+  int result;
+
+  TRY_MSVC_INVAL
+    {
+      result = raise (sig);
+    }
+  CATCH_MSVC_INVAL
+    {
+      result = -1;
+      errno = EINVAL;
+    }
+  DONE_MSVC_INVAL;
+
+  return result;
+}
+#endif
diff --git a/src/grep/lib/rawmemchr.c b/src/grep/lib/rawmemchr.c
new file mode 100644
index 0000000..896d435
--- /dev/null
+++ b/src/grep/lib/rawmemchr.c
@@ -0,0 +1,141 @@
+/* Searching in a string.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <string.h>
+
+/* A function definition is only needed if HAVE_RAWMEMCHR is not defined.  */
+#if !HAVE_RAWMEMCHR
+
+/* Find the first occurrence of C in S.  */
+void *
+rawmemchr (const void *s, int c_in)
+{
+  /* On 32-bit hardware, choosing longword to be a 32-bit unsigned
+     long instead of a 64-bit uintmax_t tends to give better
+     performance.  On 64-bit hardware, unsigned long is generally 64
+     bits already.  Change this typedef to experiment with
+     performance.  */
+  typedef unsigned long int longword;
+
+  const unsigned char *char_ptr;
+  const longword *longword_ptr;
+  longword repeated_one;
+  longword repeated_c;
+  unsigned char c;
+
+  c = (unsigned char) c_in;
+
+  /* Handle the first few bytes by reading one byte at a time.
+     Do this until CHAR_PTR is aligned on a longword boundary.  */
+  for (char_ptr = (const unsigned char *) s;
+       (size_t) char_ptr % sizeof (longword) != 0;
+       ++char_ptr)
+    if (*char_ptr == c)
+      return (void *) char_ptr;
+
+  longword_ptr = (const longword *) char_ptr;
+
+  /* All these elucidatory comments refer to 4-byte longwords,
+     but the theory applies equally well to any size longwords.  */
+
+  /* Compute auxiliary longword values:
+     repeated_one is a value which has a 1 in every byte.
+     repeated_c has c in every byte.  */
+  repeated_one = 0x01010101;
+  repeated_c = c | (c << 8);
+  repeated_c |= repeated_c << 16;
+  if (0xffffffffU < (longword) -1)
+    {
+      repeated_one |= repeated_one << 31 << 1;
+      repeated_c |= repeated_c << 31 << 1;
+      if (8 < sizeof (longword))
+        {
+          size_t i;
+
+          for (i = 64; i < sizeof (longword) * 8; i *= 2)
+            {
+              repeated_one |= repeated_one << i;
+              repeated_c |= repeated_c << i;
+            }
+        }
+    }
+
+  /* Instead of the traditional loop which tests each byte, we will
+     test a longword at a time.  The tricky part is testing if *any of
+     the four* bytes in the longword in question are equal to NUL or
+     c.  We first use an xor with repeated_c.  This reduces the task
+     to testing whether *any of the four* bytes in longword1 is zero.
+
+     We compute tmp =
+       ((longword1 - repeated_one) & ~longword1) & (repeated_one << 7).
+     That is, we perform the following operations:
+       1. Subtract repeated_one.
+       2. & ~longword1.
+       3. & a mask consisting of 0x80 in every byte.
+     Consider what happens in each byte:
+       - If a byte of longword1 is zero, step 1 and 2 transform it into 0xff,
+         and step 3 transforms it into 0x80.  A carry can also be propagated
+         to more significant bytes.
+       - If a byte of longword1 is nonzero, let its lowest 1 bit be at
+         position k (0 <= k <= 7); so the lowest k bits are 0.  After step 1,
+         the byte ends in a single bit of value 0 and k bits of value 1.
+         After step 2, the result is just k bits of value 1: 2^k - 1.  After
+         step 3, the result is 0.  And no carry is produced.
+     So, if longword1 has only non-zero bytes, tmp is zero.
+     Whereas if longword1 has a zero byte, call j the position of the least
+     significant zero byte.  Then the result has a zero at positions 0, ...,
+     j-1 and a 0x80 at position j.  We cannot predict the result at the more
+     significant bytes (positions j+1..3), but it does not matter since we
+     already have a non-zero bit at position 8*j+7.
+
+     The test whether any byte in longword1 is zero is equivalent
+     to testing whether tmp is nonzero.
+
+     This test can read beyond the end of a string, depending on where
+     C_IN is encountered.  However, this is considered safe since the
+     initialization phase ensured that the read will be aligned,
+     therefore, the read will not cross page boundaries and will not
+     cause a fault.  */
+
+  while (1)
+    {
+      longword longword1 = *longword_ptr ^ repeated_c;
+
+      if ((((longword1 - repeated_one) & ~longword1)
+           & (repeated_one << 7)) != 0)
+        break;
+      longword_ptr++;
+    }
+
+  char_ptr = (const unsigned char *) longword_ptr;
+
+  /* At this point, we know that one of the sizeof (longword) bytes
+     starting at char_ptr is == c.  On little-endian machines, we
+     could determine the first such byte without any further memory
+     accesses, just by looking at the tmp result from the last loop
+     iteration.  But this does not work on big-endian machines.
+     Choose code that works in both cases.  */
+
+  char_ptr = (unsigned char *) longword_ptr;
+  while (*char_ptr != c)
+    char_ptr++;
+  return (void *) char_ptr;
+}
+
+#endif
diff --git a/src/grep/lib/rawmemchr.valgrind b/src/grep/lib/rawmemchr.valgrind
new file mode 100644
index 0000000..d489c32
--- /dev/null
+++ b/src/grep/lib/rawmemchr.valgrind
@@ -0,0 +1,28 @@
+# Suppress a valgrind message about use of uninitialized memory in rawmemchr().
+
+# Copyright (C) 2008-2021 Free Software Foundation, Inc.
+#
+# This file is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as
+# published by the Free Software Foundation; either version 2.1 of the
+# License, or (at your option) any later version.
+#
+# This file is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# This use is OK because it provides only a speedup.
+{
+    rawmemchr-value4
+    Memcheck:Value4
+    fun:rawmemchr
+}
+{
+    rawmemchr-value8
+    Memcheck:Value8
+    fun:rawmemchr
+}
diff --git a/src/grep/lib/read.c b/src/grep/lib/read.c
new file mode 100644
index 0000000..840d9ed
--- /dev/null
+++ b/src/grep/lib/read.c
@@ -0,0 +1,95 @@
+/* POSIX compatible read() function.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2011.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+
+# include <errno.h>
+# include <io.h>
+
+# define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+# include <windows.h>
+
+# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+#  include "msvc-inval.h"
+# endif
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+
+/* Don't assume that UNICODE is not defined.  */
+# undef GetNamedPipeHandleState
+# define GetNamedPipeHandleState GetNamedPipeHandleStateA
+
+# undef read
+
+# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+static ssize_t
+read_nothrow (int fd, void *buf, size_t count)
+{
+  ssize_t result;
+
+  TRY_MSVC_INVAL
+    {
+      result = _read (fd, buf, count);
+    }
+  CATCH_MSVC_INVAL
+    {
+      result = -1;
+      errno = EBADF;
+    }
+  DONE_MSVC_INVAL;
+
+  return result;
+}
+# else
+#  define read_nothrow _read
+# endif
+
+ssize_t
+rpl_read (int fd, void *buf, size_t count)
+{
+  ssize_t ret = read_nothrow (fd, buf, count);
+
+# if GNULIB_NONBLOCKING
+  if (ret < 0
+      && GetLastError () == ERROR_NO_DATA)
+    {
+      HANDLE h = (HANDLE) _get_osfhandle (fd);
+      if (GetFileType (h) == FILE_TYPE_PIPE)
+        {
+          /* h is a pipe or socket.  */
+          DWORD state;
+          if (GetNamedPipeHandleState (h, &state, NULL, NULL, NULL, NULL, 0)
+              && (state & PIPE_NOWAIT) != 0)
+            /* h is a pipe in non-blocking mode.
+               Change errno from EINVAL to EAGAIN.  */
+            errno = EAGAIN;
+        }
+    }
+# endif
+
+  return ret;
+}
+
+#endif
diff --git a/src/grep/lib/readdir.c b/src/grep/lib/readdir.c
new file mode 100644
index 0000000..9e8e1c3
--- /dev/null
+++ b/src/grep/lib/readdir.c
@@ -0,0 +1,102 @@
+/* Read the next entry of a directory.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <dirent.h>
+
+#include <errno.h>
+#include <stddef.h>
+
+#include "dirent-private.h"
+
+/* Don't assume that UNICODE is not defined.  */
+#undef FindNextFile
+#define FindNextFile FindNextFileA
+
+struct dirent *
+readdir (DIR *dirp)
+{
+  char type;
+  struct dirent *result;
+
+  /* There is no need to add code to produce entries for "." and "..".
+     According to the POSIX:2008 section "4.12 Pathname Resolution"
+     <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html>
+     "." and ".." are syntactic entities.
+     POSIX also says:
+       "If entries for dot or dot-dot exist, one entry shall be returned
+        for dot and one entry shall be returned for dot-dot; otherwise,
+        they shall not be returned."  */
+
+  switch (dirp->status)
+    {
+    case -2:
+      /* End of directory already reached.  */
+      return NULL;
+    case -1:
+      break;
+    case 0:
+      if (!FindNextFile (dirp->current, &dirp->entry))
+        {
+          switch (GetLastError ())
+            {
+            case ERROR_NO_MORE_FILES:
+              dirp->status = -2;
+              return NULL;
+            default:
+              errno = EIO;
+              return NULL;
+            }
+        }
+      break;
+    default:
+      errno = dirp->status;
+      return NULL;
+    }
+
+  dirp->status = 0;
+
+  if (dirp->entry.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
+    type = DT_DIR;
+  else if (dirp->entry.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)
+    type = DT_LNK;
+  else if ((dirp->entry.dwFileAttributes
+            & ~(FILE_ATTRIBUTE_READONLY
+                | FILE_ATTRIBUTE_HIDDEN
+                | FILE_ATTRIBUTE_SYSTEM
+                | FILE_ATTRIBUTE_ARCHIVE
+                | FILE_ATTRIBUTE_NORMAL
+                | FILE_ATTRIBUTE_TEMPORARY
+                | FILE_ATTRIBUTE_SPARSE_FILE
+                | FILE_ATTRIBUTE_COMPRESSED
+                | FILE_ATTRIBUTE_NOT_CONTENT_INDEXED
+                | FILE_ATTRIBUTE_ENCRYPTED)) == 0)
+    /* Devices like COM1, LPT1, NUL would also have the attributes 0x20 but
+       they cannot occur here.  */
+    type = DT_REG;
+  else
+    type = DT_UNKNOWN;
+
+  /* Reuse the memory of dirp->entry for the result.  */
+  result =
+    (struct dirent *)
+    ((char *) dirp->entry.cFileName - offsetof (struct dirent, d_name[0]));
+  result->d_type = type;
+
+  return result;
+}
diff --git a/src/grep/lib/realloc.c b/src/grep/lib/realloc.c
new file mode 100644
index 0000000..af03f0c
--- /dev/null
+++ b/src/grep/lib/realloc.c
@@ -0,0 +1,63 @@
+/* realloc() function that is glibc compatible.
+
+   Copyright (C) 1997, 2003-2004, 2006-2007, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering and Bruno Haible */
+
+#include <config.h>
+
+#include <stdlib.h>
+
+#include <errno.h>
+
+#include "xalloc-oversized.h"
+
+/* Call the system's realloc below.  This file does not define
+   _GL_USE_STDLIB_ALLOC because it needs Gnulib's malloc if present.  */
+#undef realloc
+
+/* Change the size of an allocated block of memory P to N bytes,
+   with error checking.  If P is NULL, use malloc.  Otherwise if N is zero,
+   free P and return NULL.  */
+
+void *
+rpl_realloc (void *p, size_t n)
+{
+  if (p == NULL)
+    return malloc (n);
+
+  if (n == 0)
+    {
+      free (p);
+      return NULL;
+    }
+
+  if (xalloc_oversized (n, 1))
+    {
+      errno = ENOMEM;
+      return NULL;
+    }
+
+  void *result = realloc (p, n);
+
+#if !HAVE_MALLOC_POSIX
+  if (result == NULL)
+    errno = ENOMEM;
+#endif
+
+  return result;
+}
diff --git a/src/grep/lib/reallocarray.c b/src/grep/lib/reallocarray.c
new file mode 100644
index 0000000..1fb2f3c
--- /dev/null
+++ b/src/grep/lib/reallocarray.c
@@ -0,0 +1,39 @@
+/* reallocarray function that is glibc compatible.
+
+   Copyright (C) 2017-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Darshit Shah */
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <errno.h>
+
+#include "intprops.h"
+
+void *
+reallocarray (void *ptr, size_t nmemb, size_t size)
+{
+  size_t nbytes;
+  if (INT_MULTIPLY_WRAPV (nmemb, size, &nbytes))
+    {
+      errno = ENOMEM;
+      return NULL;
+    }
+
+  /* Rely on the semantics of GNU realloc.  */
+  return realloc (ptr, nbytes);
+}
diff --git a/src/grep/lib/regcomp.c b/src/grep/lib/regcomp.c
new file mode 100644
index 0000000..02b0e70
--- /dev/null
+++ b/src/grep/lib/regcomp.c
@@ -0,0 +1,3922 @@
+/* Extended regular expression matching and search library.
+   Copyright (C) 2002-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifdef _LIBC
+# include <locale/weight.h>
+#endif
+
+static reg_errcode_t re_compile_internal (regex_t *preg, const char * pattern,
+					  size_t length, reg_syntax_t syntax);
+static void re_compile_fastmap_iter (regex_t *bufp,
+				     const re_dfastate_t *init_state,
+				     char *fastmap);
+static reg_errcode_t init_dfa (re_dfa_t *dfa, size_t pat_len);
+#ifdef RE_ENABLE_I18N
+static void free_charset (re_charset_t *cset);
+#endif /* RE_ENABLE_I18N */
+static void free_workarea_compile (regex_t *preg);
+static reg_errcode_t create_initial_state (re_dfa_t *dfa);
+#ifdef RE_ENABLE_I18N
+static void optimize_utf8 (re_dfa_t *dfa);
+#endif
+static reg_errcode_t analyze (regex_t *preg);
+static reg_errcode_t preorder (bin_tree_t *root,
+			       reg_errcode_t (fn (void *, bin_tree_t *)),
+			       void *extra);
+static reg_errcode_t postorder (bin_tree_t *root,
+				reg_errcode_t (fn (void *, bin_tree_t *)),
+				void *extra);
+static reg_errcode_t optimize_subexps (void *extra, bin_tree_t *node);
+static reg_errcode_t lower_subexps (void *extra, bin_tree_t *node);
+static bin_tree_t *lower_subexp (reg_errcode_t *err, regex_t *preg,
+				 bin_tree_t *node);
+static reg_errcode_t calc_first (void *extra, bin_tree_t *node);
+static reg_errcode_t calc_next (void *extra, bin_tree_t *node);
+static reg_errcode_t link_nfa_nodes (void *extra, bin_tree_t *node);
+static Idx duplicate_node (re_dfa_t *dfa, Idx org_idx, unsigned int constraint);
+static Idx search_duplicated_node (const re_dfa_t *dfa, Idx org_node,
+				   unsigned int constraint);
+static reg_errcode_t calc_eclosure (re_dfa_t *dfa);
+static reg_errcode_t calc_eclosure_iter (re_node_set *new_set, re_dfa_t *dfa,
+					 Idx node, bool root);
+static reg_errcode_t calc_inveclosure (re_dfa_t *dfa);
+static Idx fetch_number (re_string_t *input, re_token_t *token,
+			 reg_syntax_t syntax);
+static int peek_token (re_token_t *token, re_string_t *input,
+			reg_syntax_t syntax);
+static bin_tree_t *parse (re_string_t *regexp, regex_t *preg,
+			  reg_syntax_t syntax, reg_errcode_t *err);
+static bin_tree_t *parse_reg_exp (re_string_t *regexp, regex_t *preg,
+				  re_token_t *token, reg_syntax_t syntax,
+				  Idx nest, reg_errcode_t *err);
+static bin_tree_t *parse_branch (re_string_t *regexp, regex_t *preg,
+				 re_token_t *token, reg_syntax_t syntax,
+				 Idx nest, reg_errcode_t *err);
+static bin_tree_t *parse_expression (re_string_t *regexp, regex_t *preg,
+				     re_token_t *token, reg_syntax_t syntax,
+				     Idx nest, reg_errcode_t *err);
+static bin_tree_t *parse_sub_exp (re_string_t *regexp, regex_t *preg,
+				  re_token_t *token, reg_syntax_t syntax,
+				  Idx nest, reg_errcode_t *err);
+static bin_tree_t *parse_dup_op (bin_tree_t *dup_elem, re_string_t *regexp,
+				 re_dfa_t *dfa, re_token_t *token,
+				 reg_syntax_t syntax, reg_errcode_t *err);
+static bin_tree_t *parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa,
+				      re_token_t *token, reg_syntax_t syntax,
+				      reg_errcode_t *err);
+static reg_errcode_t parse_bracket_element (bracket_elem_t *elem,
+					    re_string_t *regexp,
+					    re_token_t *token, int token_len,
+					    re_dfa_t *dfa,
+					    reg_syntax_t syntax,
+					    bool accept_hyphen);
+static reg_errcode_t parse_bracket_symbol (bracket_elem_t *elem,
+					  re_string_t *regexp,
+					  re_token_t *token);
+#ifdef RE_ENABLE_I18N
+static reg_errcode_t build_equiv_class (bitset_t sbcset,
+					re_charset_t *mbcset,
+					Idx *equiv_class_alloc,
+					const unsigned char *name);
+static reg_errcode_t build_charclass (RE_TRANSLATE_TYPE trans,
+				      bitset_t sbcset,
+				      re_charset_t *mbcset,
+				      Idx *char_class_alloc,
+				      const char *class_name,
+				      reg_syntax_t syntax);
+#else  /* not RE_ENABLE_I18N */
+static reg_errcode_t build_equiv_class (bitset_t sbcset,
+					const unsigned char *name);
+static reg_errcode_t build_charclass (RE_TRANSLATE_TYPE trans,
+				      bitset_t sbcset,
+				      const char *class_name,
+				      reg_syntax_t syntax);
+#endif /* not RE_ENABLE_I18N */
+static bin_tree_t *build_charclass_op (re_dfa_t *dfa,
+				       RE_TRANSLATE_TYPE trans,
+				       const char *class_name,
+				       const char *extra,
+				       bool non_match, reg_errcode_t *err);
+static bin_tree_t *create_tree (re_dfa_t *dfa,
+				bin_tree_t *left, bin_tree_t *right,
+				re_token_type_t type);
+static bin_tree_t *create_token_tree (re_dfa_t *dfa,
+				      bin_tree_t *left, bin_tree_t *right,
+				      const re_token_t *token);
+static bin_tree_t *duplicate_tree (const bin_tree_t *src, re_dfa_t *dfa);
+static void free_token (re_token_t *node);
+static reg_errcode_t free_tree (void *extra, bin_tree_t *node);
+static reg_errcode_t mark_opt_subexp (void *extra, bin_tree_t *node);
+
+/* This table gives an error message for each of the error codes listed
+   in regex.h.  Obviously the order here has to be same as there.
+   POSIX doesn't require that we do anything for REG_NOERROR,
+   but why not be nice?  */
+
+static const char __re_error_msgid[] =
+  {
+#define REG_NOERROR_IDX	0
+    gettext_noop ("Success")	/* REG_NOERROR */
+    "\0"
+#define REG_NOMATCH_IDX (REG_NOERROR_IDX + sizeof "Success")
+    gettext_noop ("No match")	/* REG_NOMATCH */
+    "\0"
+#define REG_BADPAT_IDX	(REG_NOMATCH_IDX + sizeof "No match")
+    gettext_noop ("Invalid regular expression") /* REG_BADPAT */
+    "\0"
+#define REG_ECOLLATE_IDX (REG_BADPAT_IDX + sizeof "Invalid regular expression")
+    gettext_noop ("Invalid collation character") /* REG_ECOLLATE */
+    "\0"
+#define REG_ECTYPE_IDX	(REG_ECOLLATE_IDX + sizeof "Invalid collation character")
+    gettext_noop ("Invalid character class name") /* REG_ECTYPE */
+    "\0"
+#define REG_EESCAPE_IDX	(REG_ECTYPE_IDX + sizeof "Invalid character class name")
+    gettext_noop ("Trailing backslash") /* REG_EESCAPE */
+    "\0"
+#define REG_ESUBREG_IDX	(REG_EESCAPE_IDX + sizeof "Trailing backslash")
+    gettext_noop ("Invalid back reference") /* REG_ESUBREG */
+    "\0"
+#define REG_EBRACK_IDX	(REG_ESUBREG_IDX + sizeof "Invalid back reference")
+    gettext_noop ("Unmatched [, [^, [:, [., or [=")	/* REG_EBRACK */
+    "\0"
+#define REG_EPAREN_IDX	(REG_EBRACK_IDX + sizeof "Unmatched [, [^, [:, [., or [=")
+    gettext_noop ("Unmatched ( or \\(") /* REG_EPAREN */
+    "\0"
+#define REG_EBRACE_IDX	(REG_EPAREN_IDX + sizeof "Unmatched ( or \\(")
+    gettext_noop ("Unmatched \\{") /* REG_EBRACE */
+    "\0"
+#define REG_BADBR_IDX	(REG_EBRACE_IDX + sizeof "Unmatched \\{")
+    gettext_noop ("Invalid content of \\{\\}") /* REG_BADBR */
+    "\0"
+#define REG_ERANGE_IDX	(REG_BADBR_IDX + sizeof "Invalid content of \\{\\}")
+    gettext_noop ("Invalid range end")	/* REG_ERANGE */
+    "\0"
+#define REG_ESPACE_IDX	(REG_ERANGE_IDX + sizeof "Invalid range end")
+    gettext_noop ("Memory exhausted") /* REG_ESPACE */
+    "\0"
+#define REG_BADRPT_IDX	(REG_ESPACE_IDX + sizeof "Memory exhausted")
+    gettext_noop ("Invalid preceding regular expression") /* REG_BADRPT */
+    "\0"
+#define REG_EEND_IDX	(REG_BADRPT_IDX + sizeof "Invalid preceding regular expression")
+    gettext_noop ("Premature end of regular expression") /* REG_EEND */
+    "\0"
+#define REG_ESIZE_IDX	(REG_EEND_IDX + sizeof "Premature end of regular expression")
+    gettext_noop ("Regular expression too big") /* REG_ESIZE */
+    "\0"
+#define REG_ERPAREN_IDX	(REG_ESIZE_IDX + sizeof "Regular expression too big")
+    gettext_noop ("Unmatched ) or \\)") /* REG_ERPAREN */
+  };
+
+static const size_t __re_error_msgid_idx[] =
+  {
+    REG_NOERROR_IDX,
+    REG_NOMATCH_IDX,
+    REG_BADPAT_IDX,
+    REG_ECOLLATE_IDX,
+    REG_ECTYPE_IDX,
+    REG_EESCAPE_IDX,
+    REG_ESUBREG_IDX,
+    REG_EBRACK_IDX,
+    REG_EPAREN_IDX,
+    REG_EBRACE_IDX,
+    REG_BADBR_IDX,
+    REG_ERANGE_IDX,
+    REG_ESPACE_IDX,
+    REG_BADRPT_IDX,
+    REG_EEND_IDX,
+    REG_ESIZE_IDX,
+    REG_ERPAREN_IDX
+  };
+
+/* Entry points for GNU code.  */
+
+/* re_compile_pattern is the GNU regular expression compiler: it
+   compiles PATTERN (of length LENGTH) and puts the result in BUFP.
+   Returns 0 if the pattern was valid, otherwise an error string.
+
+   Assumes the 'allocated' (and perhaps 'buffer') and 'translate' fields
+   are set in BUFP on entry.  */
+
+const char *
+re_compile_pattern (const char *pattern, size_t length,
+		    struct re_pattern_buffer *bufp)
+{
+  reg_errcode_t ret;
+
+  /* And GNU code determines whether or not to get register information
+     by passing null for the REGS argument to re_match, etc., not by
+     setting no_sub, unless RE_NO_SUB is set.  */
+  bufp->no_sub = !!(re_syntax_options & RE_NO_SUB);
+
+  /* Match anchors at newline.  */
+  bufp->newline_anchor = 1;
+
+  ret = re_compile_internal (bufp, pattern, length, re_syntax_options);
+
+  if (!ret)
+    return NULL;
+  return gettext (__re_error_msgid + __re_error_msgid_idx[(int) ret]);
+}
+weak_alias (__re_compile_pattern, re_compile_pattern)
+
+/* Set by 're_set_syntax' to the current regexp syntax to recognize.  Can
+   also be assigned to arbitrarily: each pattern buffer stores its own
+   syntax, so it can be changed between regex compilations.  */
+/* This has no initializer because initialized variables in Emacs
+   become read-only after dumping.  */
+reg_syntax_t re_syntax_options;
+
+
+/* Specify the precise syntax of regexps for compilation.  This provides
+   for compatibility for various utilities which historically have
+   different, incompatible syntaxes.
+
+   The argument SYNTAX is a bit mask comprised of the various bits
+   defined in regex.h.  We return the old syntax.  */
+
+reg_syntax_t
+re_set_syntax (reg_syntax_t syntax)
+{
+  reg_syntax_t ret = re_syntax_options;
+
+  re_syntax_options = syntax;
+  return ret;
+}
+weak_alias (__re_set_syntax, re_set_syntax)
+
+int
+re_compile_fastmap (struct re_pattern_buffer *bufp)
+{
+  re_dfa_t *dfa = bufp->buffer;
+  char *fastmap = bufp->fastmap;
+
+  memset (fastmap, '\0', sizeof (char) * SBC_MAX);
+  re_compile_fastmap_iter (bufp, dfa->init_state, fastmap);
+  if (dfa->init_state != dfa->init_state_word)
+    re_compile_fastmap_iter (bufp, dfa->init_state_word, fastmap);
+  if (dfa->init_state != dfa->init_state_nl)
+    re_compile_fastmap_iter (bufp, dfa->init_state_nl, fastmap);
+  if (dfa->init_state != dfa->init_state_begbuf)
+    re_compile_fastmap_iter (bufp, dfa->init_state_begbuf, fastmap);
+  bufp->fastmap_accurate = 1;
+  return 0;
+}
+weak_alias (__re_compile_fastmap, re_compile_fastmap)
+
+static inline void
+__attribute__ ((always_inline))
+re_set_fastmap (char *fastmap, bool icase, int ch)
+{
+  fastmap[ch] = 1;
+  if (icase)
+    fastmap[tolower (ch)] = 1;
+}
+
+/* Helper function for re_compile_fastmap.
+   Compile fastmap for the initial_state INIT_STATE.  */
+
+static void
+re_compile_fastmap_iter (regex_t *bufp, const re_dfastate_t *init_state,
+			 char *fastmap)
+{
+  re_dfa_t *dfa = bufp->buffer;
+  Idx node_cnt;
+  bool icase = (dfa->mb_cur_max == 1 && (bufp->syntax & RE_ICASE));
+  for (node_cnt = 0; node_cnt < init_state->nodes.nelem; ++node_cnt)
+    {
+      Idx node = init_state->nodes.elems[node_cnt];
+      re_token_type_t type = dfa->nodes[node].type;
+
+      if (type == CHARACTER)
+	{
+	  re_set_fastmap (fastmap, icase, dfa->nodes[node].opr.c);
+#ifdef RE_ENABLE_I18N
+	  if ((bufp->syntax & RE_ICASE) && dfa->mb_cur_max > 1)
+	    {
+	      unsigned char buf[MB_LEN_MAX];
+	      unsigned char *p;
+	      wchar_t wc;
+	      mbstate_t state;
+
+	      p = buf;
+	      *p++ = dfa->nodes[node].opr.c;
+	      while (++node < dfa->nodes_len
+		     &&	dfa->nodes[node].type == CHARACTER
+		     && dfa->nodes[node].mb_partial)
+		*p++ = dfa->nodes[node].opr.c;
+	      memset (&state, '\0', sizeof (state));
+	      if (__mbrtowc (&wc, (const char *) buf, p - buf,
+			     &state) == p - buf
+		  && (__wcrtomb ((char *) buf, __towlower (wc), &state)
+		      != (size_t) -1))
+		re_set_fastmap (fastmap, false, buf[0]);
+	    }
+#endif
+	}
+      else if (type == SIMPLE_BRACKET)
+	{
+	  int i, ch;
+	  for (i = 0, ch = 0; i < BITSET_WORDS; ++i)
+	    {
+	      int j;
+	      bitset_word_t w = dfa->nodes[node].opr.sbcset[i];
+	      for (j = 0; j < BITSET_WORD_BITS; ++j, ++ch)
+		if (w & ((bitset_word_t) 1 << j))
+		  re_set_fastmap (fastmap, icase, ch);
+	    }
+	}
+#ifdef RE_ENABLE_I18N
+      else if (type == COMPLEX_BRACKET)
+	{
+	  re_charset_t *cset = dfa->nodes[node].opr.mbcset;
+	  Idx i;
+
+# ifdef _LIBC
+	  /* See if we have to try all bytes which start multiple collation
+	     elements.
+	     e.g. In da_DK, we want to catch 'a' since "aa" is a valid
+		  collation element, and don't catch 'b' since 'b' is
+		  the only collation element which starts from 'b' (and
+		  it is caught by SIMPLE_BRACKET).  */
+	      if (_NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES) != 0
+		  && (cset->ncoll_syms || cset->nranges))
+		{
+		  const int32_t *table = (const int32_t *)
+		    _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEMB);
+		  for (i = 0; i < SBC_MAX; ++i)
+		    if (table[i] < 0)
+		      re_set_fastmap (fastmap, icase, i);
+		}
+# endif /* _LIBC */
+
+	  /* See if we have to start the match at all multibyte characters,
+	     i.e. where we would not find an invalid sequence.  This only
+	     applies to multibyte character sets; for single byte character
+	     sets, the SIMPLE_BRACKET again suffices.  */
+	  if (dfa->mb_cur_max > 1
+	      && (cset->nchar_classes || cset->non_match || cset->nranges
+# ifdef _LIBC
+		  || cset->nequiv_classes
+# endif /* _LIBC */
+		 ))
+	    {
+	      unsigned char c = 0;
+	      do
+		{
+		  mbstate_t mbs;
+		  memset (&mbs, 0, sizeof (mbs));
+		  if (__mbrtowc (NULL, (char *) &c, 1, &mbs) == (size_t) -2)
+		    re_set_fastmap (fastmap, false, (int) c);
+		}
+	      while (++c != 0);
+	    }
+
+	  else
+	    {
+	      /* ... Else catch all bytes which can start the mbchars.  */
+	      for (i = 0; i < cset->nmbchars; ++i)
+		{
+		  char buf[256];
+		  mbstate_t state;
+		  memset (&state, '\0', sizeof (state));
+		  if (__wcrtomb (buf, cset->mbchars[i], &state) != (size_t) -1)
+		    re_set_fastmap (fastmap, icase, *(unsigned char *) buf);
+		  if ((bufp->syntax & RE_ICASE) && dfa->mb_cur_max > 1)
+		    {
+		      if (__wcrtomb (buf, __towlower (cset->mbchars[i]), &state)
+			  != (size_t) -1)
+			re_set_fastmap (fastmap, false, *(unsigned char *) buf);
+		    }
+		}
+	    }
+	}
+#endif /* RE_ENABLE_I18N */
+      else if (type == OP_PERIOD
+#ifdef RE_ENABLE_I18N
+	       || type == OP_UTF8_PERIOD
+#endif /* RE_ENABLE_I18N */
+	       || type == END_OF_RE)
+	{
+	  memset (fastmap, '\1', sizeof (char) * SBC_MAX);
+	  if (type == END_OF_RE)
+	    bufp->can_be_null = 1;
+	  return;
+	}
+    }
+}
+
+/* Entry point for POSIX code.  */
+/* regcomp takes a regular expression as a string and compiles it.
+
+   PREG is a regex_t *.  We do not expect any fields to be initialized,
+   since POSIX says we shouldn't.  Thus, we set
+
+     'buffer' to the compiled pattern;
+     'used' to the length of the compiled pattern;
+     'syntax' to RE_SYNTAX_POSIX_EXTENDED if the
+       REG_EXTENDED bit in CFLAGS is set; otherwise, to
+       RE_SYNTAX_POSIX_BASIC;
+     'newline_anchor' to REG_NEWLINE being set in CFLAGS;
+     'fastmap' to an allocated space for the fastmap;
+     'fastmap_accurate' to zero;
+     're_nsub' to the number of subexpressions in PATTERN.
+
+   PATTERN is the address of the pattern string.
+
+   CFLAGS is a series of bits which affect compilation.
+
+     If REG_EXTENDED is set, we use POSIX extended syntax; otherwise, we
+     use POSIX basic syntax.
+
+     If REG_NEWLINE is set, then . and [^...] don't match newline.
+     Also, regexec will try a match beginning after every newline.
+
+     If REG_ICASE is set, then we considers upper- and lowercase
+     versions of letters to be equivalent when matching.
+
+     If REG_NOSUB is set, then when PREG is passed to regexec, that
+     routine will report only success or failure, and nothing about the
+     registers.
+
+   It returns 0 if it succeeds, nonzero if it doesn't.  (See regex.h for
+   the return codes and their meanings.)  */
+
+int
+regcomp (regex_t *__restrict preg, const char *__restrict pattern, int cflags)
+{
+  reg_errcode_t ret;
+  reg_syntax_t syntax = ((cflags & REG_EXTENDED) ? RE_SYNTAX_POSIX_EXTENDED
+			 : RE_SYNTAX_POSIX_BASIC);
+
+  preg->buffer = NULL;
+  preg->allocated = 0;
+  preg->used = 0;
+
+  /* Try to allocate space for the fastmap.  */
+  preg->fastmap = re_malloc (char, SBC_MAX);
+  if (__glibc_unlikely (preg->fastmap == NULL))
+    return REG_ESPACE;
+
+  syntax |= (cflags & REG_ICASE) ? RE_ICASE : 0;
+
+  /* If REG_NEWLINE is set, newlines are treated differently.  */
+  if (cflags & REG_NEWLINE)
+    { /* REG_NEWLINE implies neither . nor [^...] match newline.  */
+      syntax &= ~RE_DOT_NEWLINE;
+      syntax |= RE_HAT_LISTS_NOT_NEWLINE;
+      /* It also changes the matching behavior.  */
+      preg->newline_anchor = 1;
+    }
+  else
+    preg->newline_anchor = 0;
+  preg->no_sub = !!(cflags & REG_NOSUB);
+  preg->translate = NULL;
+
+  ret = re_compile_internal (preg, pattern, strlen (pattern), syntax);
+
+  /* POSIX doesn't distinguish between an unmatched open-group and an
+     unmatched close-group: both are REG_EPAREN.  */
+  if (ret == REG_ERPAREN)
+    ret = REG_EPAREN;
+
+  /* We have already checked preg->fastmap != NULL.  */
+  if (__glibc_likely (ret == REG_NOERROR))
+    /* Compute the fastmap now, since regexec cannot modify the pattern
+       buffer.  This function never fails in this implementation.  */
+    (void) re_compile_fastmap (preg);
+  else
+    {
+      /* Some error occurred while compiling the expression.  */
+      re_free (preg->fastmap);
+      preg->fastmap = NULL;
+    }
+
+  return (int) ret;
+}
+libc_hidden_def (__regcomp)
+weak_alias (__regcomp, regcomp)
+
+/* Returns a message corresponding to an error code, ERRCODE, returned
+   from either regcomp or regexec.   We don't use PREG here.  */
+
+size_t
+regerror (int errcode, const regex_t *__restrict preg, char *__restrict errbuf,
+	  size_t errbuf_size)
+{
+  const char *msg;
+  size_t msg_size;
+  int nerrcodes = sizeof __re_error_msgid_idx / sizeof __re_error_msgid_idx[0];
+
+  if (__glibc_unlikely (errcode < 0 || errcode >= nerrcodes))
+    /* Only error codes returned by the rest of the code should be passed
+       to this routine.  If we are given anything else, or if other regex
+       code generates an invalid error code, then the program has a bug.
+       Dump core so we can fix it.  */
+    abort ();
+
+  msg = gettext (__re_error_msgid + __re_error_msgid_idx[errcode]);
+
+  msg_size = strlen (msg) + 1; /* Includes the null.  */
+
+  if (__glibc_likely (errbuf_size != 0))
+    {
+      size_t cpy_size = msg_size;
+      if (__glibc_unlikely (msg_size > errbuf_size))
+	{
+	  cpy_size = errbuf_size - 1;
+	  errbuf[cpy_size] = '\0';
+	}
+      memcpy (errbuf, msg, cpy_size);
+    }
+
+  return msg_size;
+}
+weak_alias (__regerror, regerror)
+
+
+#ifdef RE_ENABLE_I18N
+/* This static array is used for the map to single-byte characters when
+   UTF-8 is used.  Otherwise we would allocate memory just to initialize
+   it the same all the time.  UTF-8 is the preferred encoding so this is
+   a worthwhile optimization.  */
+static const bitset_t utf8_sb_map =
+{
+  /* Set the first 128 bits.  */
+# if (defined __GNUC__ || __clang_major__ >= 4) && !defined __STRICT_ANSI__
+  [0 ... 0x80 / BITSET_WORD_BITS - 1] = BITSET_WORD_MAX
+# else
+#  if 4 * BITSET_WORD_BITS < ASCII_CHARS
+#   error "bitset_word_t is narrower than 32 bits"
+#  elif 3 * BITSET_WORD_BITS < ASCII_CHARS
+  BITSET_WORD_MAX, BITSET_WORD_MAX, BITSET_WORD_MAX,
+#  elif 2 * BITSET_WORD_BITS < ASCII_CHARS
+  BITSET_WORD_MAX, BITSET_WORD_MAX,
+#  elif 1 * BITSET_WORD_BITS < ASCII_CHARS
+  BITSET_WORD_MAX,
+#  endif
+  (BITSET_WORD_MAX
+   >> (SBC_MAX % BITSET_WORD_BITS == 0
+       ? 0
+       : BITSET_WORD_BITS - SBC_MAX % BITSET_WORD_BITS))
+# endif
+};
+#endif
+
+
+static void
+free_dfa_content (re_dfa_t *dfa)
+{
+  Idx i, j;
+
+  if (dfa->nodes)
+    for (i = 0; i < dfa->nodes_len; ++i)
+      free_token (dfa->nodes + i);
+  re_free (dfa->nexts);
+  for (i = 0; i < dfa->nodes_len; ++i)
+    {
+      if (dfa->eclosures != NULL)
+	re_node_set_free (dfa->eclosures + i);
+      if (dfa->inveclosures != NULL)
+	re_node_set_free (dfa->inveclosures + i);
+      if (dfa->edests != NULL)
+	re_node_set_free (dfa->edests + i);
+    }
+  re_free (dfa->edests);
+  re_free (dfa->eclosures);
+  re_free (dfa->inveclosures);
+  re_free (dfa->nodes);
+
+  if (dfa->state_table)
+    for (i = 0; i <= dfa->state_hash_mask; ++i)
+      {
+	struct re_state_table_entry *entry = dfa->state_table + i;
+	for (j = 0; j < entry->num; ++j)
+	  {
+	    re_dfastate_t *state = entry->array[j];
+	    free_state (state);
+	  }
+	re_free (entry->array);
+      }
+  re_free (dfa->state_table);
+#ifdef RE_ENABLE_I18N
+  if (dfa->sb_char != utf8_sb_map)
+    re_free (dfa->sb_char);
+#endif
+  re_free (dfa->subexp_map);
+#ifdef DEBUG
+  re_free (dfa->re_str);
+#endif
+
+  re_free (dfa);
+}
+
+
+/* Free dynamically allocated space used by PREG.  */
+
+void
+regfree (regex_t *preg)
+{
+  re_dfa_t *dfa = preg->buffer;
+  if (__glibc_likely (dfa != NULL))
+    {
+      lock_fini (dfa->lock);
+      free_dfa_content (dfa);
+    }
+  preg->buffer = NULL;
+  preg->allocated = 0;
+
+  re_free (preg->fastmap);
+  preg->fastmap = NULL;
+
+  re_free (preg->translate);
+  preg->translate = NULL;
+}
+libc_hidden_def (__regfree)
+weak_alias (__regfree, regfree)
+
+/* Entry points compatible with 4.2 BSD regex library.  We don't define
+   them unless specifically requested.  */
+
+#if defined _REGEX_RE_COMP || defined _LIBC
+
+/* BSD has one and only one pattern buffer.  */
+static struct re_pattern_buffer re_comp_buf;
+
+char *
+# ifdef _LIBC
+/* Make these definitions weak in libc, so POSIX programs can redefine
+   these names if they don't use our functions, and still use
+   regcomp/regexec above without link errors.  */
+weak_function
+# endif
+re_comp (const char *s)
+{
+  reg_errcode_t ret;
+  char *fastmap;
+
+  if (!s)
+    {
+      if (!re_comp_buf.buffer)
+	return gettext ("No previous regular expression");
+      return 0;
+    }
+
+  if (re_comp_buf.buffer)
+    {
+      fastmap = re_comp_buf.fastmap;
+      re_comp_buf.fastmap = NULL;
+      __regfree (&re_comp_buf);
+      memset (&re_comp_buf, '\0', sizeof (re_comp_buf));
+      re_comp_buf.fastmap = fastmap;
+    }
+
+  if (re_comp_buf.fastmap == NULL)
+    {
+      re_comp_buf.fastmap = re_malloc (char, SBC_MAX);
+      if (re_comp_buf.fastmap == NULL)
+	return (char *) gettext (__re_error_msgid
+				 + __re_error_msgid_idx[(int) REG_ESPACE]);
+    }
+
+  /* Since 're_exec' always passes NULL for the 'regs' argument, we
+     don't need to initialize the pattern buffer fields which affect it.  */
+
+  /* Match anchors at newlines.  */
+  re_comp_buf.newline_anchor = 1;
+
+  ret = re_compile_internal (&re_comp_buf, s, strlen (s), re_syntax_options);
+
+  if (!ret)
+    return NULL;
+
+  /* Yes, we're discarding 'const' here if !HAVE_LIBINTL.  */
+  return (char *) gettext (__re_error_msgid + __re_error_msgid_idx[(int) ret]);
+}
+
+#ifdef _LIBC
+libc_freeres_fn (free_mem)
+{
+  __regfree (&re_comp_buf);
+}
+#endif
+
+#endif /* _REGEX_RE_COMP */
+
+/* Internal entry point.
+   Compile the regular expression PATTERN, whose length is LENGTH.
+   SYNTAX indicate regular expression's syntax.  */
+
+static reg_errcode_t
+re_compile_internal (regex_t *preg, const char * pattern, size_t length,
+		     reg_syntax_t syntax)
+{
+  reg_errcode_t err = REG_NOERROR;
+  re_dfa_t *dfa;
+  re_string_t regexp;
+
+  /* Initialize the pattern buffer.  */
+  preg->fastmap_accurate = 0;
+  preg->syntax = syntax;
+  preg->not_bol = preg->not_eol = 0;
+  preg->used = 0;
+  preg->re_nsub = 0;
+  preg->can_be_null = 0;
+  preg->regs_allocated = REGS_UNALLOCATED;
+
+  /* Initialize the dfa.  */
+  dfa = preg->buffer;
+  if (__glibc_unlikely (preg->allocated < sizeof (re_dfa_t)))
+    {
+      /* If zero allocated, but buffer is non-null, try to realloc
+	 enough space.  This loses if buffer's address is bogus, but
+	 that is the user's responsibility.  If ->buffer is NULL this
+	 is a simple allocation.  */
+      dfa = re_realloc (preg->buffer, re_dfa_t, 1);
+      if (dfa == NULL)
+	return REG_ESPACE;
+      preg->allocated = sizeof (re_dfa_t);
+      preg->buffer = dfa;
+    }
+  preg->used = sizeof (re_dfa_t);
+
+  err = init_dfa (dfa, length);
+  if (__glibc_unlikely (err == REG_NOERROR && lock_init (dfa->lock) != 0))
+    err = REG_ESPACE;
+  if (__glibc_unlikely (err != REG_NOERROR))
+    {
+      free_dfa_content (dfa);
+      preg->buffer = NULL;
+      preg->allocated = 0;
+      return err;
+    }
+#ifdef DEBUG
+  /* Note: length+1 will not overflow since it is checked in init_dfa.  */
+  dfa->re_str = re_malloc (char, length + 1);
+  strncpy (dfa->re_str, pattern, length + 1);
+#endif
+
+  err = re_string_construct (&regexp, pattern, length, preg->translate,
+			     (syntax & RE_ICASE) != 0, dfa);
+  if (__glibc_unlikely (err != REG_NOERROR))
+    {
+    re_compile_internal_free_return:
+      free_workarea_compile (preg);
+      re_string_destruct (&regexp);
+      lock_fini (dfa->lock);
+      free_dfa_content (dfa);
+      preg->buffer = NULL;
+      preg->allocated = 0;
+      return err;
+    }
+
+  /* Parse the regular expression, and build a structure tree.  */
+  preg->re_nsub = 0;
+  dfa->str_tree = parse (&regexp, preg, syntax, &err);
+  if (__glibc_unlikely (dfa->str_tree == NULL))
+    goto re_compile_internal_free_return;
+
+  /* Analyze the tree and create the nfa.  */
+  err = analyze (preg);
+  if (__glibc_unlikely (err != REG_NOERROR))
+    goto re_compile_internal_free_return;
+
+#ifdef RE_ENABLE_I18N
+  /* If possible, do searching in single byte encoding to speed things up.  */
+  if (dfa->is_utf8 && !(syntax & RE_ICASE) && preg->translate == NULL)
+    optimize_utf8 (dfa);
+#endif
+
+  /* Then create the initial state of the dfa.  */
+  err = create_initial_state (dfa);
+
+  /* Release work areas.  */
+  free_workarea_compile (preg);
+  re_string_destruct (&regexp);
+
+  if (__glibc_unlikely (err != REG_NOERROR))
+    {
+      lock_fini (dfa->lock);
+      free_dfa_content (dfa);
+      preg->buffer = NULL;
+      preg->allocated = 0;
+    }
+
+  return err;
+}
+
+/* Initialize DFA.  We use the length of the regular expression PAT_LEN
+   as the initial length of some arrays.  */
+
+static reg_errcode_t
+init_dfa (re_dfa_t *dfa, size_t pat_len)
+{
+  __re_size_t table_size;
+#ifndef _LIBC
+  const char *codeset_name;
+#endif
+#ifdef RE_ENABLE_I18N
+  size_t max_i18n_object_size = MAX (sizeof (wchar_t), sizeof (wctype_t));
+#else
+  size_t max_i18n_object_size = 0;
+#endif
+  size_t max_object_size =
+    MAX (sizeof (struct re_state_table_entry),
+	 MAX (sizeof (re_token_t),
+	      MAX (sizeof (re_node_set),
+		   MAX (sizeof (regmatch_t),
+			max_i18n_object_size))));
+
+  memset (dfa, '\0', sizeof (re_dfa_t));
+
+  /* Force allocation of str_tree_storage the first time.  */
+  dfa->str_tree_storage_idx = BIN_TREE_STORAGE_SIZE;
+
+  /* Avoid overflows.  The extra "/ 2" is for the table_size doubling
+     calculation below, and for similar doubling calculations
+     elsewhere.  And it's <= rather than <, because some of the
+     doubling calculations add 1 afterwards.  */
+  if (__glibc_unlikely (MIN (IDX_MAX, SIZE_MAX / max_object_size) / 2
+			<= pat_len))
+    return REG_ESPACE;
+
+  dfa->nodes_alloc = pat_len + 1;
+  dfa->nodes = re_malloc (re_token_t, dfa->nodes_alloc);
+
+  /*  table_size = 2 ^ ceil(log pat_len) */
+  for (table_size = 1; ; table_size <<= 1)
+    if (table_size > pat_len)
+      break;
+
+  dfa->state_table = calloc (sizeof (struct re_state_table_entry), table_size);
+  dfa->state_hash_mask = table_size - 1;
+
+  dfa->mb_cur_max = MB_CUR_MAX;
+#ifdef _LIBC
+  if (dfa->mb_cur_max == 6
+      && strcmp (_NL_CURRENT (LC_CTYPE, _NL_CTYPE_CODESET_NAME), "UTF-8") == 0)
+    dfa->is_utf8 = 1;
+  dfa->map_notascii = (_NL_CURRENT_WORD (LC_CTYPE, _NL_CTYPE_MAP_TO_NONASCII)
+		       != 0);
+#else
+# ifdef _MSC_VER
+  (void)codeset_name;
+  if (get_crt_codepage() == CP_UTF8)
+# else
+  codeset_name = nl_langinfo (CODESET);
+  if ((codeset_name[0] == 'U' || codeset_name[0] == 'u')
+      && (codeset_name[1] == 'T' || codeset_name[1] == 't')
+      && (codeset_name[2] == 'F' || codeset_name[2] == 'f')
+      && strcmp (codeset_name + 3 + (codeset_name[3] == '-'), "8") == 0)
+# endif
+    dfa->is_utf8 = 1;
+
+  /* We check exhaustively in the loop below if this charset is a
+     superset of ASCII.  */
+  dfa->map_notascii = 0;
+#endif
+
+#ifdef RE_ENABLE_I18N
+  if (dfa->mb_cur_max > 1)
+    {
+      if (dfa->is_utf8)
+	dfa->sb_char = (re_bitset_ptr_t) utf8_sb_map;
+      else
+	{
+	  int i, j, ch;
+
+	  dfa->sb_char = (re_bitset_ptr_t) calloc (sizeof (bitset_t), 1);
+	  if (__glibc_unlikely (dfa->sb_char == NULL))
+	    return REG_ESPACE;
+
+	  /* Set the bits corresponding to single byte chars.  */
+	  for (i = 0, ch = 0; i < BITSET_WORDS; ++i)
+	    for (j = 0; j < BITSET_WORD_BITS; ++j, ++ch)
+	      {
+		wint_t wch = __btowc (ch);
+		if (wch != WEOF)
+		  dfa->sb_char[i] |= (bitset_word_t) 1 << j;
+# ifndef _LIBC
+		if (isascii (ch) && wch != ch)
+		  dfa->map_notascii = 1;
+# endif
+	      }
+	}
+    }
+#endif
+
+  if (__glibc_unlikely (dfa->nodes == NULL || dfa->state_table == NULL))
+    return REG_ESPACE;
+  return REG_NOERROR;
+}
+
+/* Initialize WORD_CHAR table, which indicate which character is
+   "word".  In this case "word" means that it is the word construction
+   character used by some operators like "\<", "\>", etc.  */
+
+static void
+init_word_char (re_dfa_t *dfa)
+{
+  int i = 0;
+  int j;
+  int ch = 0;
+  dfa->word_ops_used = 1;
+  if (__glibc_likely (dfa->map_notascii == 0))
+    {
+      /* Avoid uint32_t and uint64_t as some non-GCC platforms lack
+	 them, an issue when this code is used in Gnulib.  */
+      bitset_word_t bits0 = 0x00000000;
+      bitset_word_t bits1 = 0x03ff0000;
+      bitset_word_t bits2 = 0x87fffffe;
+      bitset_word_t bits3 = 0x07fffffe;
+      if (BITSET_WORD_BITS == 64)
+	{
+	  /* Pacify gcc -Woverflow on 32-bit platformns.  */
+	  dfa->word_char[0] = bits1 << 31 << 1 | bits0;
+	  dfa->word_char[1] = bits3 << 31 << 1 | bits2;
+	  i = 2;
+	}
+      else if (BITSET_WORD_BITS == 32)
+	{
+	  dfa->word_char[0] = bits0;
+	  dfa->word_char[1] = bits1;
+	  dfa->word_char[2] = bits2;
+	  dfa->word_char[3] = bits3;
+	  i = 4;
+	}
+      else
+        goto general_case;
+      ch = 128;
+
+      if (__glibc_likely (dfa->is_utf8))
+	{
+	  memset (&dfa->word_char[i], '\0', (SBC_MAX - ch) / 8);
+	  return;
+	}
+    }
+
+ general_case:
+  for (; i < BITSET_WORDS; ++i)
+    for (j = 0; j < BITSET_WORD_BITS; ++j, ++ch)
+      if (isalnum (ch) || ch == '_')
+	dfa->word_char[i] |= (bitset_word_t) 1 << j;
+}
+
+/* Free the work area which are only used while compiling.  */
+
+static void
+free_workarea_compile (regex_t *preg)
+{
+  re_dfa_t *dfa = preg->buffer;
+  bin_tree_storage_t *storage, *next;
+  for (storage = dfa->str_tree_storage; storage; storage = next)
+    {
+      next = storage->next;
+      re_free (storage);
+    }
+  dfa->str_tree_storage = NULL;
+  dfa->str_tree_storage_idx = BIN_TREE_STORAGE_SIZE;
+  dfa->str_tree = NULL;
+  re_free (dfa->org_indices);
+  dfa->org_indices = NULL;
+}
+
+/* Create initial states for all contexts.  */
+
+static reg_errcode_t
+create_initial_state (re_dfa_t *dfa)
+{
+  Idx first, i;
+  reg_errcode_t err;
+  re_node_set init_nodes;
+
+  /* Initial states have the epsilon closure of the node which is
+     the first node of the regular expression.  */
+  first = dfa->str_tree->first->node_idx;
+  dfa->init_node = first;
+  err = re_node_set_init_copy (&init_nodes, dfa->eclosures + first);
+  if (__glibc_unlikely (err != REG_NOERROR))
+    return err;
+
+  /* The back-references which are in initial states can epsilon transit,
+     since in this case all of the subexpressions can be null.
+     Then we add epsilon closures of the nodes which are the next nodes of
+     the back-references.  */
+  if (dfa->nbackref > 0)
+    for (i = 0; i < init_nodes.nelem; ++i)
+      {
+	Idx node_idx = init_nodes.elems[i];
+	re_token_type_t type = dfa->nodes[node_idx].type;
+
+	Idx clexp_idx;
+	if (type != OP_BACK_REF)
+	  continue;
+	for (clexp_idx = 0; clexp_idx < init_nodes.nelem; ++clexp_idx)
+	  {
+	    re_token_t *clexp_node;
+	    clexp_node = dfa->nodes + init_nodes.elems[clexp_idx];
+	    if (clexp_node->type == OP_CLOSE_SUBEXP
+		&& clexp_node->opr.idx == dfa->nodes[node_idx].opr.idx)
+	      break;
+	  }
+	if (clexp_idx == init_nodes.nelem)
+	  continue;
+
+	if (type == OP_BACK_REF)
+	  {
+	    Idx dest_idx = dfa->edests[node_idx].elems[0];
+	    if (!re_node_set_contains (&init_nodes, dest_idx))
+	      {
+		reg_errcode_t merge_err
+                  = re_node_set_merge (&init_nodes, dfa->eclosures + dest_idx);
+		if (merge_err != REG_NOERROR)
+		  return merge_err;
+		i = 0;
+	      }
+	  }
+      }
+
+  /* It must be the first time to invoke acquire_state.  */
+  dfa->init_state = re_acquire_state_context (&err, dfa, &init_nodes, 0);
+  /* We don't check ERR here, since the initial state must not be NULL.  */
+  if (__glibc_unlikely (dfa->init_state == NULL))
+    return err;
+  if (dfa->init_state->has_constraint)
+    {
+      dfa->init_state_word = re_acquire_state_context (&err, dfa, &init_nodes,
+						       CONTEXT_WORD);
+      dfa->init_state_nl = re_acquire_state_context (&err, dfa, &init_nodes,
+						     CONTEXT_NEWLINE);
+      dfa->init_state_begbuf = re_acquire_state_context (&err, dfa,
+							 &init_nodes,
+							 CONTEXT_NEWLINE
+							 | CONTEXT_BEGBUF);
+      if (__glibc_unlikely (dfa->init_state_word == NULL
+			    || dfa->init_state_nl == NULL
+			    || dfa->init_state_begbuf == NULL))
+	return err;
+    }
+  else
+    dfa->init_state_word = dfa->init_state_nl
+      = dfa->init_state_begbuf = dfa->init_state;
+
+  re_node_set_free (&init_nodes);
+  return REG_NOERROR;
+}
+
+#ifdef RE_ENABLE_I18N
+/* If it is possible to do searching in single byte encoding instead of UTF-8
+   to speed things up, set dfa->mb_cur_max to 1, clear is_utf8 and change
+   DFA nodes where needed.  */
+
+static void
+optimize_utf8 (re_dfa_t *dfa)
+{
+  Idx node;
+  int i;
+  bool mb_chars = false;
+  bool has_period = false;
+
+  for (node = 0; node < dfa->nodes_len; ++node)
+    switch (dfa->nodes[node].type)
+      {
+      case CHARACTER:
+	if (dfa->nodes[node].opr.c >= ASCII_CHARS)
+	  mb_chars = true;
+	break;
+      case ANCHOR:
+	switch (dfa->nodes[node].opr.ctx_type)
+	  {
+	  case LINE_FIRST:
+	  case LINE_LAST:
+	  case BUF_FIRST:
+	  case BUF_LAST:
+	    break;
+	  default:
+	    /* Word anchors etc. cannot be handled.  It's okay to test
+	       opr.ctx_type since constraints (for all DFA nodes) are
+	       created by ORing one or more opr.ctx_type values.  */
+	    return;
+	  }
+	break;
+      case OP_PERIOD:
+	has_period = true;
+	break;
+      case OP_BACK_REF:
+      case OP_ALT:
+      case END_OF_RE:
+      case OP_DUP_ASTERISK:
+      case OP_OPEN_SUBEXP:
+      case OP_CLOSE_SUBEXP:
+	break;
+      case COMPLEX_BRACKET:
+	return;
+      case SIMPLE_BRACKET:
+	/* Just double check.  */
+	{
+	  int rshift = (ASCII_CHARS % BITSET_WORD_BITS == 0
+			? 0
+			: BITSET_WORD_BITS - ASCII_CHARS % BITSET_WORD_BITS);
+	  for (i = ASCII_CHARS / BITSET_WORD_BITS; i < BITSET_WORDS; ++i)
+	    {
+	      if (dfa->nodes[node].opr.sbcset[i] >> rshift != 0)
+		return;
+	      rshift = 0;
+	    }
+	}
+	break;
+      default:
+	abort ();
+      }
+
+  if (mb_chars || has_period)
+    for (node = 0; node < dfa->nodes_len; ++node)
+      {
+	if (dfa->nodes[node].type == CHARACTER
+	    && dfa->nodes[node].opr.c >= ASCII_CHARS)
+	  dfa->nodes[node].mb_partial = 0;
+	else if (dfa->nodes[node].type == OP_PERIOD)
+	  dfa->nodes[node].type = OP_UTF8_PERIOD;
+      }
+
+  /* The search can be in single byte locale.  */
+  dfa->mb_cur_max = 1;
+  dfa->is_utf8 = 0;
+  dfa->has_mb_node = dfa->nbackref > 0 || has_period;
+}
+#endif
+
+/* Analyze the structure tree, and calculate "first", "next", "edest",
+   "eclosure", and "inveclosure".  */
+
+static reg_errcode_t
+analyze (regex_t *preg)
+{
+  re_dfa_t *dfa = preg->buffer;
+  reg_errcode_t ret;
+
+  /* Allocate arrays.  */
+  dfa->nexts = re_malloc (Idx, dfa->nodes_alloc);
+  dfa->org_indices = re_malloc (Idx, dfa->nodes_alloc);
+  dfa->edests = re_malloc (re_node_set, dfa->nodes_alloc);
+  dfa->eclosures = re_malloc (re_node_set, dfa->nodes_alloc);
+  if (__glibc_unlikely (dfa->nexts == NULL || dfa->org_indices == NULL
+			|| dfa->edests == NULL || dfa->eclosures == NULL))
+    return REG_ESPACE;
+
+  dfa->subexp_map = re_malloc (Idx, preg->re_nsub);
+  if (dfa->subexp_map != NULL)
+    {
+      Idx i;
+      for (i = 0; i < preg->re_nsub; i++)
+	dfa->subexp_map[i] = i;
+      preorder (dfa->str_tree, optimize_subexps, dfa);
+      for (i = 0; i < preg->re_nsub; i++)
+	if (dfa->subexp_map[i] != i)
+	  break;
+      if (i == preg->re_nsub)
+	{
+	  re_free (dfa->subexp_map);
+	  dfa->subexp_map = NULL;
+	}
+    }
+
+  ret = postorder (dfa->str_tree, lower_subexps, preg);
+  if (__glibc_unlikely (ret != REG_NOERROR))
+    return ret;
+  ret = postorder (dfa->str_tree, calc_first, dfa);
+  if (__glibc_unlikely (ret != REG_NOERROR))
+    return ret;
+  preorder (dfa->str_tree, calc_next, dfa);
+  ret = preorder (dfa->str_tree, link_nfa_nodes, dfa);
+  if (__glibc_unlikely (ret != REG_NOERROR))
+    return ret;
+  ret = calc_eclosure (dfa);
+  if (__glibc_unlikely (ret != REG_NOERROR))
+    return ret;
+
+  /* We only need this during the prune_impossible_nodes pass in regexec.c;
+     skip it if p_i_n will not run, as calc_inveclosure can be quadratic.  */
+  if ((!preg->no_sub && preg->re_nsub > 0 && dfa->has_plural_match)
+      || dfa->nbackref)
+    {
+      dfa->inveclosures = re_malloc (re_node_set, dfa->nodes_len);
+      if (__glibc_unlikely (dfa->inveclosures == NULL))
+	return REG_ESPACE;
+      ret = calc_inveclosure (dfa);
+    }
+
+  return ret;
+}
+
+/* Our parse trees are very unbalanced, so we cannot use a stack to
+   implement parse tree visits.  Instead, we use parent pointers and
+   some hairy code in these two functions.  */
+static reg_errcode_t
+postorder (bin_tree_t *root, reg_errcode_t (fn (void *, bin_tree_t *)),
+	   void *extra)
+{
+  bin_tree_t *node, *prev;
+
+  for (node = root; ; )
+    {
+      /* Descend down the tree, preferably to the left (or to the right
+	 if that's the only child).  */
+      while (node->left || node->right)
+	if (node->left)
+	  node = node->left;
+	else
+	  node = node->right;
+
+      do
+	{
+	  reg_errcode_t err = fn (extra, node);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    return err;
+	  if (node->parent == NULL)
+	    return REG_NOERROR;
+	  prev = node;
+	  node = node->parent;
+	}
+      /* Go up while we have a node that is reached from the right.  */
+      while (node->right == prev || node->right == NULL);
+      node = node->right;
+    }
+}
+
+static reg_errcode_t
+preorder (bin_tree_t *root, reg_errcode_t (fn (void *, bin_tree_t *)),
+	  void *extra)
+{
+  bin_tree_t *node;
+
+  for (node = root; ; )
+    {
+      reg_errcode_t err = fn (extra, node);
+      if (__glibc_unlikely (err != REG_NOERROR))
+	return err;
+
+      /* Go to the left node, or up and to the right.  */
+      if (node->left)
+	node = node->left;
+      else
+	{
+	  bin_tree_t *prev = NULL;
+	  while (node->right == prev || node->right == NULL)
+	    {
+	      prev = node;
+	      node = node->parent;
+	      if (!node)
+		return REG_NOERROR;
+	    }
+	  node = node->right;
+	}
+    }
+}
+
+/* Optimization pass: if a SUBEXP is entirely contained, strip it and tell
+   re_search_internal to map the inner one's opr.idx to this one's.  Adjust
+   backreferences as well.  Requires a preorder visit.  */
+static reg_errcode_t
+optimize_subexps (void *extra, bin_tree_t *node)
+{
+  re_dfa_t *dfa = (re_dfa_t *) extra;
+
+  if (node->token.type == OP_BACK_REF && dfa->subexp_map)
+    {
+      int idx = node->token.opr.idx;
+      node->token.opr.idx = dfa->subexp_map[idx];
+      dfa->used_bkref_map |= 1 << node->token.opr.idx;
+    }
+
+  else if (node->token.type == SUBEXP
+	   && node->left && node->left->token.type == SUBEXP)
+    {
+      Idx other_idx = node->left->token.opr.idx;
+
+      node->left = node->left->left;
+      if (node->left)
+	node->left->parent = node;
+
+      dfa->subexp_map[other_idx] = dfa->subexp_map[node->token.opr.idx];
+      if (other_idx < BITSET_WORD_BITS)
+	dfa->used_bkref_map &= ~((bitset_word_t) 1 << other_idx);
+    }
+
+  return REG_NOERROR;
+}
+
+/* Lowering pass: Turn each SUBEXP node into the appropriate concatenation
+   of OP_OPEN_SUBEXP, the body of the SUBEXP (if any) and OP_CLOSE_SUBEXP.  */
+static reg_errcode_t
+lower_subexps (void *extra, bin_tree_t *node)
+{
+  regex_t *preg = (regex_t *) extra;
+  reg_errcode_t err = REG_NOERROR;
+
+  if (node->left && node->left->token.type == SUBEXP)
+    {
+      node->left = lower_subexp (&err, preg, node->left);
+      if (node->left)
+	node->left->parent = node;
+    }
+  if (node->right && node->right->token.type == SUBEXP)
+    {
+      node->right = lower_subexp (&err, preg, node->right);
+      if (node->right)
+	node->right->parent = node;
+    }
+
+  return err;
+}
+
+static bin_tree_t *
+lower_subexp (reg_errcode_t *err, regex_t *preg, bin_tree_t *node)
+{
+  re_dfa_t *dfa = preg->buffer;
+  bin_tree_t *body = node->left;
+  bin_tree_t *op, *cls, *tree1, *tree;
+
+  if (preg->no_sub
+      /* We do not optimize empty subexpressions, because otherwise we may
+	 have bad CONCAT nodes with NULL children.  This is obviously not
+	 very common, so we do not lose much.  An example that triggers
+	 this case is the sed "script" /\(\)/x.  */
+      && node->left != NULL
+      && (node->token.opr.idx >= BITSET_WORD_BITS
+	  || !(dfa->used_bkref_map
+	       & ((bitset_word_t) 1 << node->token.opr.idx))))
+    return node->left;
+
+  /* Convert the SUBEXP node to the concatenation of an
+     OP_OPEN_SUBEXP, the contents, and an OP_CLOSE_SUBEXP.  */
+  op = create_tree (dfa, NULL, NULL, OP_OPEN_SUBEXP);
+  cls = create_tree (dfa, NULL, NULL, OP_CLOSE_SUBEXP);
+  tree1 = body ? create_tree (dfa, body, cls, CONCAT) : cls;
+  tree = create_tree (dfa, op, tree1, CONCAT);
+  if (__glibc_unlikely (tree == NULL || tree1 == NULL
+			|| op == NULL || cls == NULL))
+    {
+      *err = REG_ESPACE;
+      return NULL;
+    }
+
+  op->token.opr.idx = cls->token.opr.idx = node->token.opr.idx;
+  op->token.opt_subexp = cls->token.opt_subexp = node->token.opt_subexp;
+  return tree;
+}
+
+/* Pass 1 in building the NFA: compute FIRST and create unlinked automaton
+   nodes.  Requires a postorder visit.  */
+static reg_errcode_t
+calc_first (void *extra, bin_tree_t *node)
+{
+  re_dfa_t *dfa = (re_dfa_t *) extra;
+  if (node->token.type == CONCAT)
+    {
+      node->first = node->left->first;
+      node->node_idx = node->left->node_idx;
+    }
+  else
+    {
+      node->first = node;
+      node->node_idx = re_dfa_add_node (dfa, node->token);
+      if (__glibc_unlikely (node->node_idx == -1))
+	return REG_ESPACE;
+      if (node->token.type == ANCHOR)
+	dfa->nodes[node->node_idx].constraint = node->token.opr.ctx_type;
+    }
+  return REG_NOERROR;
+}
+
+/* Pass 2: compute NEXT on the tree.  Preorder visit.  */
+static reg_errcode_t
+calc_next (void *extra, bin_tree_t *node)
+{
+  switch (node->token.type)
+    {
+    case OP_DUP_ASTERISK:
+      node->left->next = node;
+      break;
+    case CONCAT:
+      node->left->next = node->right->first;
+      node->right->next = node->next;
+      break;
+    default:
+      if (node->left)
+	node->left->next = node->next;
+      if (node->right)
+	node->right->next = node->next;
+      break;
+    }
+  return REG_NOERROR;
+}
+
+/* Pass 3: link all DFA nodes to their NEXT node (any order will do).  */
+static reg_errcode_t
+link_nfa_nodes (void *extra, bin_tree_t *node)
+{
+  re_dfa_t *dfa = (re_dfa_t *) extra;
+  Idx idx = node->node_idx;
+  reg_errcode_t err = REG_NOERROR;
+
+  switch (node->token.type)
+    {
+    case CONCAT:
+      break;
+
+    case END_OF_RE:
+      DEBUG_ASSERT (node->next == NULL);
+      break;
+
+    case OP_DUP_ASTERISK:
+    case OP_ALT:
+      {
+	Idx left, right;
+	dfa->has_plural_match = 1;
+	if (node->left != NULL)
+	  left = node->left->first->node_idx;
+	else
+	  left = node->next->node_idx;
+	if (node->right != NULL)
+	  right = node->right->first->node_idx;
+	else
+	  right = node->next->node_idx;
+	DEBUG_ASSERT (left > -1);
+	DEBUG_ASSERT (right > -1);
+	err = re_node_set_init_2 (dfa->edests + idx, left, right);
+      }
+      break;
+
+    case ANCHOR:
+    case OP_OPEN_SUBEXP:
+    case OP_CLOSE_SUBEXP:
+      err = re_node_set_init_1 (dfa->edests + idx, node->next->node_idx);
+      break;
+
+    case OP_BACK_REF:
+      dfa->nexts[idx] = node->next->node_idx;
+      if (node->token.type == OP_BACK_REF)
+	err = re_node_set_init_1 (dfa->edests + idx, dfa->nexts[idx]);
+      break;
+
+    default:
+      DEBUG_ASSERT (!IS_EPSILON_NODE (node->token.type));
+      dfa->nexts[idx] = node->next->node_idx;
+      break;
+    }
+
+  return err;
+}
+
+/* Duplicate the epsilon closure of the node ROOT_NODE.
+   Note that duplicated nodes have constraint INIT_CONSTRAINT in addition
+   to their own constraint.  */
+
+static reg_errcode_t
+duplicate_node_closure (re_dfa_t *dfa, Idx top_org_node, Idx top_clone_node,
+			Idx root_node, unsigned int init_constraint)
+{
+  Idx org_node, clone_node;
+  bool ok;
+  unsigned int constraint = init_constraint;
+  for (org_node = top_org_node, clone_node = top_clone_node;;)
+    {
+      Idx org_dest, clone_dest;
+      if (dfa->nodes[org_node].type == OP_BACK_REF)
+	{
+	  /* If the back reference epsilon-transit, its destination must
+	     also have the constraint.  Then duplicate the epsilon closure
+	     of the destination of the back reference, and store it in
+	     edests of the back reference.  */
+	  org_dest = dfa->nexts[org_node];
+	  re_node_set_empty (dfa->edests + clone_node);
+	  clone_dest = duplicate_node (dfa, org_dest, constraint);
+	  if (__glibc_unlikely (clone_dest == -1))
+	    return REG_ESPACE;
+	  dfa->nexts[clone_node] = dfa->nexts[org_node];
+	  ok = re_node_set_insert (dfa->edests + clone_node, clone_dest);
+	  if (__glibc_unlikely (! ok))
+	    return REG_ESPACE;
+	}
+      else if (dfa->edests[org_node].nelem == 0)
+	{
+	  /* In case of the node can't epsilon-transit, don't duplicate the
+	     destination and store the original destination as the
+	     destination of the node.  */
+	  dfa->nexts[clone_node] = dfa->nexts[org_node];
+	  break;
+	}
+      else if (dfa->edests[org_node].nelem == 1)
+	{
+	  /* In case of the node can epsilon-transit, and it has only one
+	     destination.  */
+	  org_dest = dfa->edests[org_node].elems[0];
+	  re_node_set_empty (dfa->edests + clone_node);
+	  /* If the node is root_node itself, it means the epsilon closure
+	     has a loop.  Then tie it to the destination of the root_node.  */
+	  if (org_node == root_node && clone_node != org_node)
+	    {
+	      ok = re_node_set_insert (dfa->edests + clone_node, org_dest);
+	      if (__glibc_unlikely (! ok))
+	        return REG_ESPACE;
+	      break;
+	    }
+	  /* In case the node has another constraint, append it.  */
+	  constraint |= dfa->nodes[org_node].constraint;
+	  clone_dest = duplicate_node (dfa, org_dest, constraint);
+	  if (__glibc_unlikely (clone_dest == -1))
+	    return REG_ESPACE;
+	  ok = re_node_set_insert (dfa->edests + clone_node, clone_dest);
+	  if (__glibc_unlikely (! ok))
+	    return REG_ESPACE;
+	}
+      else /* dfa->edests[org_node].nelem == 2 */
+	{
+	  /* In case of the node can epsilon-transit, and it has two
+	     destinations. In the bin_tree_t and DFA, that's '|' and '*'.   */
+	  org_dest = dfa->edests[org_node].elems[0];
+	  re_node_set_empty (dfa->edests + clone_node);
+	  /* Search for a duplicated node which satisfies the constraint.  */
+	  clone_dest = search_duplicated_node (dfa, org_dest, constraint);
+	  if (clone_dest == -1)
+	    {
+	      /* There is no such duplicated node, create a new one.  */
+	      reg_errcode_t err;
+	      clone_dest = duplicate_node (dfa, org_dest, constraint);
+	      if (__glibc_unlikely (clone_dest == -1))
+		return REG_ESPACE;
+	      ok = re_node_set_insert (dfa->edests + clone_node, clone_dest);
+	      if (__glibc_unlikely (! ok))
+		return REG_ESPACE;
+	      err = duplicate_node_closure (dfa, org_dest, clone_dest,
+					    root_node, constraint);
+	      if (__glibc_unlikely (err != REG_NOERROR))
+		return err;
+	    }
+	  else
+	    {
+	      /* There is a duplicated node which satisfies the constraint,
+		 use it to avoid infinite loop.  */
+	      ok = re_node_set_insert (dfa->edests + clone_node, clone_dest);
+	      if (__glibc_unlikely (! ok))
+		return REG_ESPACE;
+	    }
+
+	  org_dest = dfa->edests[org_node].elems[1];
+	  clone_dest = duplicate_node (dfa, org_dest, constraint);
+	  if (__glibc_unlikely (clone_dest == -1))
+	    return REG_ESPACE;
+	  ok = re_node_set_insert (dfa->edests + clone_node, clone_dest);
+	  if (__glibc_unlikely (! ok))
+	    return REG_ESPACE;
+	}
+      org_node = org_dest;
+      clone_node = clone_dest;
+    }
+  return REG_NOERROR;
+}
+
+/* Search for a node which is duplicated from the node ORG_NODE, and
+   satisfies the constraint CONSTRAINT.  */
+
+static Idx
+search_duplicated_node (const re_dfa_t *dfa, Idx org_node,
+			unsigned int constraint)
+{
+  Idx idx;
+  for (idx = dfa->nodes_len - 1; dfa->nodes[idx].duplicated && idx > 0; --idx)
+    {
+      if (org_node == dfa->org_indices[idx]
+	  && constraint == dfa->nodes[idx].constraint)
+	return idx; /* Found.  */
+    }
+  return -1; /* Not found.  */
+}
+
+/* Duplicate the node whose index is ORG_IDX and set the constraint CONSTRAINT.
+   Return the index of the new node, or -1 if insufficient storage is
+   available.  */
+
+static Idx
+duplicate_node (re_dfa_t *dfa, Idx org_idx, unsigned int constraint)
+{
+  Idx dup_idx = re_dfa_add_node (dfa, dfa->nodes[org_idx]);
+  if (__glibc_likely (dup_idx != -1))
+    {
+      dfa->nodes[dup_idx].constraint = constraint;
+      dfa->nodes[dup_idx].constraint |= dfa->nodes[org_idx].constraint;
+      dfa->nodes[dup_idx].duplicated = 1;
+
+      /* Store the index of the original node.  */
+      dfa->org_indices[dup_idx] = org_idx;
+    }
+  return dup_idx;
+}
+
+static reg_errcode_t
+calc_inveclosure (re_dfa_t *dfa)
+{
+  Idx src, idx;
+  bool ok;
+  for (idx = 0; idx < dfa->nodes_len; ++idx)
+    re_node_set_init_empty (dfa->inveclosures + idx);
+
+  for (src = 0; src < dfa->nodes_len; ++src)
+    {
+      Idx *elems = dfa->eclosures[src].elems;
+      for (idx = 0; idx < dfa->eclosures[src].nelem; ++idx)
+	{
+	  ok = re_node_set_insert_last (dfa->inveclosures + elems[idx], src);
+	  if (__glibc_unlikely (! ok))
+	    return REG_ESPACE;
+	}
+    }
+
+  return REG_NOERROR;
+}
+
+/* Calculate "eclosure" for all the node in DFA.  */
+
+static reg_errcode_t
+calc_eclosure (re_dfa_t *dfa)
+{
+  Idx node_idx;
+  bool incomplete;
+  DEBUG_ASSERT (dfa->nodes_len > 0);
+  incomplete = false;
+  /* For each nodes, calculate epsilon closure.  */
+  for (node_idx = 0; ; ++node_idx)
+    {
+      reg_errcode_t err;
+      re_node_set eclosure_elem;
+      if (node_idx == dfa->nodes_len)
+	{
+	  if (!incomplete)
+	    break;
+	  incomplete = false;
+	  node_idx = 0;
+	}
+
+      DEBUG_ASSERT (dfa->eclosures[node_idx].nelem != -1);
+
+      /* If we have already calculated, skip it.  */
+      if (dfa->eclosures[node_idx].nelem != 0)
+	continue;
+      /* Calculate epsilon closure of 'node_idx'.  */
+      err = calc_eclosure_iter (&eclosure_elem, dfa, node_idx, true);
+      if (__glibc_unlikely (err != REG_NOERROR))
+	return err;
+
+      if (dfa->eclosures[node_idx].nelem == 0)
+	{
+	  incomplete = true;
+	  re_node_set_free (&eclosure_elem);
+	}
+    }
+  return REG_NOERROR;
+}
+
+/* Calculate epsilon closure of NODE.  */
+
+static reg_errcode_t
+calc_eclosure_iter (re_node_set *new_set, re_dfa_t *dfa, Idx node, bool root)
+{
+  reg_errcode_t err;
+  Idx i;
+  re_node_set eclosure;
+  bool incomplete = false;
+  err = re_node_set_alloc (&eclosure, dfa->edests[node].nelem + 1);
+  if (__glibc_unlikely (err != REG_NOERROR))
+    return err;
+
+  /* An epsilon closure includes itself.  */
+  eclosure.elems[eclosure.nelem++] = node;
+
+  /* This indicates that we are calculating this node now.
+     We reference this value to avoid infinite loop.  */
+  dfa->eclosures[node].nelem = -1;
+
+  /* If the current node has constraints, duplicate all nodes
+     since they must inherit the constraints.  */
+  if (dfa->nodes[node].constraint
+      && dfa->edests[node].nelem
+      && !dfa->nodes[dfa->edests[node].elems[0]].duplicated)
+    {
+      err = duplicate_node_closure (dfa, node, node, node,
+				    dfa->nodes[node].constraint);
+      if (__glibc_unlikely (err != REG_NOERROR))
+	return err;
+    }
+
+  /* Expand each epsilon destination nodes.  */
+  if (IS_EPSILON_NODE(dfa->nodes[node].type))
+    for (i = 0; i < dfa->edests[node].nelem; ++i)
+      {
+	re_node_set eclosure_elem;
+	Idx edest = dfa->edests[node].elems[i];
+	/* If calculating the epsilon closure of 'edest' is in progress,
+	   return intermediate result.  */
+	if (dfa->eclosures[edest].nelem == -1)
+	  {
+	    incomplete = true;
+	    continue;
+	  }
+	/* If we haven't calculated the epsilon closure of 'edest' yet,
+	   calculate now. Otherwise use calculated epsilon closure.  */
+	if (dfa->eclosures[edest].nelem == 0)
+	  {
+	    err = calc_eclosure_iter (&eclosure_elem, dfa, edest, false);
+	    if (__glibc_unlikely (err != REG_NOERROR))
+	      return err;
+	  }
+	else
+	  eclosure_elem = dfa->eclosures[edest];
+	/* Merge the epsilon closure of 'edest'.  */
+	err = re_node_set_merge (&eclosure, &eclosure_elem);
+	if (__glibc_unlikely (err != REG_NOERROR))
+	  return err;
+	/* If the epsilon closure of 'edest' is incomplete,
+	   the epsilon closure of this node is also incomplete.  */
+	if (dfa->eclosures[edest].nelem == 0)
+	  {
+	    incomplete = true;
+	    re_node_set_free (&eclosure_elem);
+	  }
+      }
+
+  if (incomplete && !root)
+    dfa->eclosures[node].nelem = 0;
+  else
+    dfa->eclosures[node] = eclosure;
+  *new_set = eclosure;
+  return REG_NOERROR;
+}
+
+/* Functions for token which are used in the parser.  */
+
+/* Fetch a token from INPUT.
+   We must not use this function inside bracket expressions.  */
+
+static void
+fetch_token (re_token_t *result, re_string_t *input, reg_syntax_t syntax)
+{
+  re_string_skip_bytes (input, peek_token (result, input, syntax));
+}
+
+/* Peek a token from INPUT, and return the length of the token.
+   We must not use this function inside bracket expressions.  */
+
+static int
+peek_token (re_token_t *token, re_string_t *input, reg_syntax_t syntax)
+{
+  unsigned char c;
+
+  if (re_string_eoi (input))
+    {
+      token->type = END_OF_RE;
+      return 0;
+    }
+
+  c = re_string_peek_byte (input, 0);
+  token->opr.c = c;
+
+  token->word_char = 0;
+#ifdef RE_ENABLE_I18N
+  token->mb_partial = 0;
+  if (input->mb_cur_max > 1
+      && !re_string_first_byte (input, re_string_cur_idx (input)))
+    {
+      token->type = CHARACTER;
+      token->mb_partial = 1;
+      return 1;
+    }
+#endif
+  if (c == '\\')
+    {
+      unsigned char c2;
+      if (re_string_cur_idx (input) + 1 >= re_string_length (input))
+	{
+	  token->type = BACK_SLASH;
+	  return 1;
+	}
+
+      c2 = re_string_peek_byte_case (input, 1);
+      token->opr.c = c2;
+      token->type = CHARACTER;
+#ifdef RE_ENABLE_I18N
+      if (input->mb_cur_max > 1)
+	{
+	  wint_t wc = re_string_wchar_at (input,
+					  re_string_cur_idx (input) + 1);
+	  token->word_char = IS_WIDE_WORD_CHAR (wc) != 0;
+	}
+      else
+#endif
+	token->word_char = IS_WORD_CHAR (c2) != 0;
+
+      switch (c2)
+	{
+	case '|':
+	  if (!(syntax & RE_LIMITED_OPS) && !(syntax & RE_NO_BK_VBAR))
+	    token->type = OP_ALT;
+	  break;
+	case '1': case '2': case '3': case '4': case '5':
+	case '6': case '7': case '8': case '9':
+	  if (!(syntax & RE_NO_BK_REFS))
+	    {
+	      token->type = OP_BACK_REF;
+	      token->opr.idx = c2 - '1';
+	    }
+	  break;
+	case '<':
+	  if (!(syntax & RE_NO_GNU_OPS))
+	    {
+	      token->type = ANCHOR;
+	      token->opr.ctx_type = WORD_FIRST;
+	    }
+	  break;
+	case '>':
+	  if (!(syntax & RE_NO_GNU_OPS))
+	    {
+	      token->type = ANCHOR;
+	      token->opr.ctx_type = WORD_LAST;
+	    }
+	  break;
+	case 'b':
+	  if (!(syntax & RE_NO_GNU_OPS))
+	    {
+	      token->type = ANCHOR;
+	      token->opr.ctx_type = WORD_DELIM;
+	    }
+	  break;
+	case 'B':
+	  if (!(syntax & RE_NO_GNU_OPS))
+	    {
+	      token->type = ANCHOR;
+	      token->opr.ctx_type = NOT_WORD_DELIM;
+	    }
+	  break;
+	case 'w':
+	  if (!(syntax & RE_NO_GNU_OPS))
+	    token->type = OP_WORD;
+	  break;
+	case 'W':
+	  if (!(syntax & RE_NO_GNU_OPS))
+	    token->type = OP_NOTWORD;
+	  break;
+	case 's':
+	  if (!(syntax & RE_NO_GNU_OPS))
+	    token->type = OP_SPACE;
+	  break;
+	case 'S':
+	  if (!(syntax & RE_NO_GNU_OPS))
+	    token->type = OP_NOTSPACE;
+	  break;
+	case '`':
+	  if (!(syntax & RE_NO_GNU_OPS))
+	    {
+	      token->type = ANCHOR;
+	      token->opr.ctx_type = BUF_FIRST;
+	    }
+	  break;
+	case '\'':
+	  if (!(syntax & RE_NO_GNU_OPS))
+	    {
+	      token->type = ANCHOR;
+	      token->opr.ctx_type = BUF_LAST;
+	    }
+	  break;
+	case '(':
+	  if (!(syntax & RE_NO_BK_PARENS))
+	    token->type = OP_OPEN_SUBEXP;
+	  break;
+	case ')':
+	  if (!(syntax & RE_NO_BK_PARENS))
+	    token->type = OP_CLOSE_SUBEXP;
+	  break;
+	case '+':
+	  if (!(syntax & RE_LIMITED_OPS) && (syntax & RE_BK_PLUS_QM))
+	    token->type = OP_DUP_PLUS;
+	  break;
+	case '?':
+	  if (!(syntax & RE_LIMITED_OPS) && (syntax & RE_BK_PLUS_QM))
+	    token->type = OP_DUP_QUESTION;
+	  break;
+	case '{':
+	  if ((syntax & RE_INTERVALS) && (!(syntax & RE_NO_BK_BRACES)))
+	    token->type = OP_OPEN_DUP_NUM;
+	  break;
+	case '}':
+	  if ((syntax & RE_INTERVALS) && (!(syntax & RE_NO_BK_BRACES)))
+	    token->type = OP_CLOSE_DUP_NUM;
+	  break;
+	default:
+	  break;
+	}
+      return 2;
+    }
+
+  token->type = CHARACTER;
+#ifdef RE_ENABLE_I18N
+  if (input->mb_cur_max > 1)
+    {
+      wint_t wc = re_string_wchar_at (input, re_string_cur_idx (input));
+      token->word_char = IS_WIDE_WORD_CHAR (wc) != 0;
+    }
+  else
+#endif
+    token->word_char = IS_WORD_CHAR (token->opr.c);
+
+  switch (c)
+    {
+    case '\n':
+      if (syntax & RE_NEWLINE_ALT)
+	token->type = OP_ALT;
+      break;
+    case '|':
+      if (!(syntax & RE_LIMITED_OPS) && (syntax & RE_NO_BK_VBAR))
+	token->type = OP_ALT;
+      break;
+    case '*':
+      token->type = OP_DUP_ASTERISK;
+      break;
+    case '+':
+      if (!(syntax & RE_LIMITED_OPS) && !(syntax & RE_BK_PLUS_QM))
+	token->type = OP_DUP_PLUS;
+      break;
+    case '?':
+      if (!(syntax & RE_LIMITED_OPS) && !(syntax & RE_BK_PLUS_QM))
+	token->type = OP_DUP_QUESTION;
+      break;
+    case '{':
+      if ((syntax & RE_INTERVALS) && (syntax & RE_NO_BK_BRACES))
+	token->type = OP_OPEN_DUP_NUM;
+      break;
+    case '}':
+      if ((syntax & RE_INTERVALS) && (syntax & RE_NO_BK_BRACES))
+	token->type = OP_CLOSE_DUP_NUM;
+      break;
+    case '(':
+      if (syntax & RE_NO_BK_PARENS)
+	token->type = OP_OPEN_SUBEXP;
+      break;
+    case ')':
+      if (syntax & RE_NO_BK_PARENS)
+	token->type = OP_CLOSE_SUBEXP;
+      break;
+    case '[':
+      token->type = OP_OPEN_BRACKET;
+      break;
+    case '.':
+      token->type = OP_PERIOD;
+      break;
+    case '^':
+      if (!(syntax & (RE_CONTEXT_INDEP_ANCHORS | RE_CARET_ANCHORS_HERE))
+	  && re_string_cur_idx (input) != 0)
+	{
+	  char prev = re_string_peek_byte (input, -1);
+	  if (!(syntax & RE_NEWLINE_ALT) || prev != '\n')
+	    break;
+	}
+      token->type = ANCHOR;
+      token->opr.ctx_type = LINE_FIRST;
+      break;
+    case '$':
+      if (!(syntax & RE_CONTEXT_INDEP_ANCHORS)
+	  && re_string_cur_idx (input) + 1 != re_string_length (input))
+	{
+	  re_token_t next;
+	  re_string_skip_bytes (input, 1);
+	  peek_token (&next, input, syntax);
+	  re_string_skip_bytes (input, -1);
+	  if (next.type != OP_ALT && next.type != OP_CLOSE_SUBEXP)
+	    break;
+	}
+      token->type = ANCHOR;
+      token->opr.ctx_type = LINE_LAST;
+      break;
+    default:
+      break;
+    }
+  return 1;
+}
+
+/* Peek a token from INPUT, and return the length of the token.
+   We must not use this function out of bracket expressions.  */
+
+static int
+peek_token_bracket (re_token_t *token, re_string_t *input, reg_syntax_t syntax)
+{
+  unsigned char c;
+  if (re_string_eoi (input))
+    {
+      token->type = END_OF_RE;
+      return 0;
+    }
+  c = re_string_peek_byte (input, 0);
+  token->opr.c = c;
+
+#ifdef RE_ENABLE_I18N
+  if (input->mb_cur_max > 1
+      && !re_string_first_byte (input, re_string_cur_idx (input)))
+    {
+      token->type = CHARACTER;
+      return 1;
+    }
+#endif /* RE_ENABLE_I18N */
+
+  if (c == '\\' && (syntax & RE_BACKSLASH_ESCAPE_IN_LISTS)
+      && re_string_cur_idx (input) + 1 < re_string_length (input))
+    {
+      /* In this case, '\' escape a character.  */
+      unsigned char c2;
+      re_string_skip_bytes (input, 1);
+      c2 = re_string_peek_byte (input, 0);
+      token->opr.c = c2;
+      token->type = CHARACTER;
+      return 1;
+    }
+  if (c == '[') /* '[' is a special char in a bracket exps.  */
+    {
+      unsigned char c2;
+      int token_len;
+      if (re_string_cur_idx (input) + 1 < re_string_length (input))
+	c2 = re_string_peek_byte (input, 1);
+      else
+	c2 = 0;
+      token->opr.c = c2;
+      token_len = 2;
+      switch (c2)
+	{
+	case '.':
+	  token->type = OP_OPEN_COLL_ELEM;
+	  break;
+
+	case '=':
+	  token->type = OP_OPEN_EQUIV_CLASS;
+	  break;
+
+	case ':':
+	  if (syntax & RE_CHAR_CLASSES)
+	    {
+	      token->type = OP_OPEN_CHAR_CLASS;
+	      break;
+	    }
+	  FALLTHROUGH;
+	default:
+	  token->type = CHARACTER;
+	  token->opr.c = c;
+	  token_len = 1;
+	  break;
+	}
+      return token_len;
+    }
+  switch (c)
+    {
+    case '-':
+      token->type = OP_CHARSET_RANGE;
+      break;
+    case ']':
+      token->type = OP_CLOSE_BRACKET;
+      break;
+    case '^':
+      token->type = OP_NON_MATCH_LIST;
+      break;
+    default:
+      token->type = CHARACTER;
+    }
+  return 1;
+}
+
+/* Functions for parser.  */
+
+/* Entry point of the parser.
+   Parse the regular expression REGEXP and return the structure tree.
+   If an error occurs, ERR is set by error code, and return NULL.
+   This function build the following tree, from regular expression <reg_exp>:
+	   CAT
+	   / \
+	  /   \
+   <reg_exp>  EOR
+
+   CAT means concatenation.
+   EOR means end of regular expression.  */
+
+static bin_tree_t *
+parse (re_string_t *regexp, regex_t *preg, reg_syntax_t syntax,
+       reg_errcode_t *err)
+{
+  re_dfa_t *dfa = preg->buffer;
+  bin_tree_t *tree, *eor, *root;
+  re_token_t current_token;
+  dfa->syntax = syntax;
+  fetch_token (&current_token, regexp, syntax | RE_CARET_ANCHORS_HERE);
+  tree = parse_reg_exp (regexp, preg, &current_token, syntax, 0, err);
+  if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL))
+    return NULL;
+  eor = create_tree (dfa, NULL, NULL, END_OF_RE);
+  if (tree != NULL)
+    root = create_tree (dfa, tree, eor, CONCAT);
+  else
+    root = eor;
+  if (__glibc_unlikely (eor == NULL || root == NULL))
+    {
+      *err = REG_ESPACE;
+      return NULL;
+    }
+  return root;
+}
+
+/* This function build the following tree, from regular expression
+   <branch1>|<branch2>:
+	   ALT
+	   / \
+	  /   \
+   <branch1> <branch2>
+
+   ALT means alternative, which represents the operator '|'.  */
+
+static bin_tree_t *
+parse_reg_exp (re_string_t *regexp, regex_t *preg, re_token_t *token,
+	       reg_syntax_t syntax, Idx nest, reg_errcode_t *err)
+{
+  re_dfa_t *dfa = preg->buffer;
+  bin_tree_t *tree, *branch = NULL;
+  bitset_word_t initial_bkref_map = dfa->completed_bkref_map;
+  tree = parse_branch (regexp, preg, token, syntax, nest, err);
+  if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL))
+    return NULL;
+
+  while (token->type == OP_ALT)
+    {
+      fetch_token (token, regexp, syntax | RE_CARET_ANCHORS_HERE);
+      if (token->type != OP_ALT && token->type != END_OF_RE
+	  && (nest == 0 || token->type != OP_CLOSE_SUBEXP))
+	{
+	  bitset_word_t accumulated_bkref_map = dfa->completed_bkref_map;
+	  dfa->completed_bkref_map = initial_bkref_map;
+	  branch = parse_branch (regexp, preg, token, syntax, nest, err);
+	  if (__glibc_unlikely (*err != REG_NOERROR && branch == NULL))
+	    {
+	      if (tree != NULL)
+		postorder (tree, free_tree, NULL);
+	      return NULL;
+	    }
+	  dfa->completed_bkref_map |= accumulated_bkref_map;
+	}
+      else
+	branch = NULL;
+      tree = create_tree (dfa, tree, branch, OP_ALT);
+      if (__glibc_unlikely (tree == NULL))
+	{
+	  *err = REG_ESPACE;
+	  return NULL;
+	}
+    }
+  return tree;
+}
+
+/* This function build the following tree, from regular expression
+   <exp1><exp2>:
+	CAT
+	/ \
+       /   \
+   <exp1> <exp2>
+
+   CAT means concatenation.  */
+
+static bin_tree_t *
+parse_branch (re_string_t *regexp, regex_t *preg, re_token_t *token,
+	      reg_syntax_t syntax, Idx nest, reg_errcode_t *err)
+{
+  bin_tree_t *tree, *expr;
+  re_dfa_t *dfa = preg->buffer;
+  tree = parse_expression (regexp, preg, token, syntax, nest, err);
+  if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL))
+    return NULL;
+
+  while (token->type != OP_ALT && token->type != END_OF_RE
+	 && (nest == 0 || token->type != OP_CLOSE_SUBEXP))
+    {
+      expr = parse_expression (regexp, preg, token, syntax, nest, err);
+      if (__glibc_unlikely (*err != REG_NOERROR && expr == NULL))
+	{
+	  if (tree != NULL)
+	    postorder (tree, free_tree, NULL);
+	  return NULL;
+	}
+      if (tree != NULL && expr != NULL)
+	{
+	  bin_tree_t *newtree = create_tree (dfa, tree, expr, CONCAT);
+	  if (newtree == NULL)
+	    {
+	      postorder (expr, free_tree, NULL);
+	      postorder (tree, free_tree, NULL);
+	      *err = REG_ESPACE;
+	      return NULL;
+	    }
+	  tree = newtree;
+	}
+      else if (tree == NULL)
+	tree = expr;
+      /* Otherwise expr == NULL, we don't need to create new tree.  */
+    }
+  return tree;
+}
+
+/* This function build the following tree, from regular expression a*:
+	 *
+	 |
+	 a
+*/
+
+static bin_tree_t *
+parse_expression (re_string_t *regexp, regex_t *preg, re_token_t *token,
+		  reg_syntax_t syntax, Idx nest, reg_errcode_t *err)
+{
+  re_dfa_t *dfa = preg->buffer;
+  bin_tree_t *tree;
+  switch (token->type)
+    {
+    case CHARACTER:
+      tree = create_token_tree (dfa, NULL, NULL, token);
+      if (__glibc_unlikely (tree == NULL))
+	{
+	  *err = REG_ESPACE;
+	  return NULL;
+	}
+#ifdef RE_ENABLE_I18N
+      if (dfa->mb_cur_max > 1)
+	{
+	  while (!re_string_eoi (regexp)
+		 && !re_string_first_byte (regexp, re_string_cur_idx (regexp)))
+	    {
+	      bin_tree_t *mbc_remain;
+	      fetch_token (token, regexp, syntax);
+	      mbc_remain = create_token_tree (dfa, NULL, NULL, token);
+	      tree = create_tree (dfa, tree, mbc_remain, CONCAT);
+	      if (__glibc_unlikely (mbc_remain == NULL || tree == NULL))
+		{
+		  *err = REG_ESPACE;
+		  return NULL;
+		}
+	    }
+	}
+#endif
+      break;
+
+    case OP_OPEN_SUBEXP:
+      tree = parse_sub_exp (regexp, preg, token, syntax, nest + 1, err);
+      if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL))
+	return NULL;
+      break;
+
+    case OP_OPEN_BRACKET:
+      tree = parse_bracket_exp (regexp, dfa, token, syntax, err);
+      if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL))
+	return NULL;
+      break;
+
+    case OP_BACK_REF:
+      if (!__glibc_likely (dfa->completed_bkref_map & (1 << token->opr.idx)))
+	{
+	  *err = REG_ESUBREG;
+	  return NULL;
+	}
+      dfa->used_bkref_map |= 1 << token->opr.idx;
+      tree = create_token_tree (dfa, NULL, NULL, token);
+      if (__glibc_unlikely (tree == NULL))
+	{
+	  *err = REG_ESPACE;
+	  return NULL;
+	}
+      ++dfa->nbackref;
+      dfa->has_mb_node = 1;
+      break;
+
+    case OP_OPEN_DUP_NUM:
+      if (syntax & RE_CONTEXT_INVALID_DUP)
+	{
+	  *err = REG_BADRPT;
+	  return NULL;
+	}
+      FALLTHROUGH;
+    case OP_DUP_ASTERISK:
+    case OP_DUP_PLUS:
+    case OP_DUP_QUESTION:
+      if (syntax & RE_CONTEXT_INVALID_OPS)
+	{
+	  *err = REG_BADRPT;
+	  return NULL;
+	}
+      else if (syntax & RE_CONTEXT_INDEP_OPS)
+	{
+	  fetch_token (token, regexp, syntax);
+	  return parse_expression (regexp, preg, token, syntax, nest, err);
+	}
+      FALLTHROUGH;
+    case OP_CLOSE_SUBEXP:
+      if ((token->type == OP_CLOSE_SUBEXP)
+	  && !(syntax & RE_UNMATCHED_RIGHT_PAREN_ORD))
+	{
+	  *err = REG_ERPAREN;
+	  return NULL;
+	}
+      FALLTHROUGH;
+    case OP_CLOSE_DUP_NUM:
+      /* We treat it as a normal character.  */
+
+      /* Then we can these characters as normal characters.  */
+      token->type = CHARACTER;
+      /* mb_partial and word_char bits should be initialized already
+	 by peek_token.  */
+      tree = create_token_tree (dfa, NULL, NULL, token);
+      if (__glibc_unlikely (tree == NULL))
+	{
+	  *err = REG_ESPACE;
+	  return NULL;
+	}
+      break;
+
+    case ANCHOR:
+      if ((token->opr.ctx_type
+	   & (WORD_DELIM | NOT_WORD_DELIM | WORD_FIRST | WORD_LAST))
+	  && dfa->word_ops_used == 0)
+	init_word_char (dfa);
+      if (token->opr.ctx_type == WORD_DELIM
+	  || token->opr.ctx_type == NOT_WORD_DELIM)
+	{
+	  bin_tree_t *tree_first, *tree_last;
+	  if (token->opr.ctx_type == WORD_DELIM)
+	    {
+	      token->opr.ctx_type = WORD_FIRST;
+	      tree_first = create_token_tree (dfa, NULL, NULL, token);
+	      token->opr.ctx_type = WORD_LAST;
+	    }
+	  else
+	    {
+	      token->opr.ctx_type = INSIDE_WORD;
+	      tree_first = create_token_tree (dfa, NULL, NULL, token);
+	      token->opr.ctx_type = INSIDE_NOTWORD;
+	    }
+	  tree_last = create_token_tree (dfa, NULL, NULL, token);
+	  tree = create_tree (dfa, tree_first, tree_last, OP_ALT);
+	  if (__glibc_unlikely (tree_first == NULL || tree_last == NULL
+				|| tree == NULL))
+	    {
+	      *err = REG_ESPACE;
+	      return NULL;
+	    }
+	}
+      else
+	{
+	  tree = create_token_tree (dfa, NULL, NULL, token);
+	  if (__glibc_unlikely (tree == NULL))
+	    {
+	      *err = REG_ESPACE;
+	      return NULL;
+	    }
+	}
+      /* We must return here, since ANCHORs can't be followed
+	 by repetition operators.
+	 eg. RE"^*" is invalid or "<ANCHOR(^)><CHAR(*)>",
+	     it must not be "<ANCHOR(^)><REPEAT(*)>".  */
+      fetch_token (token, regexp, syntax);
+      return tree;
+
+    case OP_PERIOD:
+      tree = create_token_tree (dfa, NULL, NULL, token);
+      if (__glibc_unlikely (tree == NULL))
+	{
+	  *err = REG_ESPACE;
+	  return NULL;
+	}
+      if (dfa->mb_cur_max > 1)
+	dfa->has_mb_node = 1;
+      break;
+
+    case OP_WORD:
+    case OP_NOTWORD:
+      tree = build_charclass_op (dfa, regexp->trans,
+				 "alnum",
+				 "_",
+				 token->type == OP_NOTWORD, err);
+      if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL))
+	return NULL;
+      break;
+
+    case OP_SPACE:
+    case OP_NOTSPACE:
+      tree = build_charclass_op (dfa, regexp->trans,
+				 "space",
+				 "",
+				 token->type == OP_NOTSPACE, err);
+      if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL))
+	return NULL;
+      break;
+
+    case OP_ALT:
+    case END_OF_RE:
+      return NULL;
+
+    case BACK_SLASH:
+      *err = REG_EESCAPE;
+      return NULL;
+
+    default:
+      /* Must not happen?  */
+      DEBUG_ASSERT (false);
+      return NULL;
+    }
+  fetch_token (token, regexp, syntax);
+
+  while (token->type == OP_DUP_ASTERISK || token->type == OP_DUP_PLUS
+	 || token->type == OP_DUP_QUESTION || token->type == OP_OPEN_DUP_NUM)
+    {
+      bin_tree_t *dup_tree = parse_dup_op (tree, regexp, dfa, token,
+					   syntax, err);
+      if (__glibc_unlikely (*err != REG_NOERROR && dup_tree == NULL))
+	{
+	  if (tree != NULL)
+	    postorder (tree, free_tree, NULL);
+	  return NULL;
+	}
+      tree = dup_tree;
+      /* In BRE consecutive duplications are not allowed.  */
+      if ((syntax & RE_CONTEXT_INVALID_DUP)
+	  && (token->type == OP_DUP_ASTERISK
+	      || token->type == OP_OPEN_DUP_NUM))
+	{
+	  if (tree != NULL)
+	    postorder (tree, free_tree, NULL);
+	  *err = REG_BADRPT;
+	  return NULL;
+	}
+    }
+
+  return tree;
+}
+
+/* This function build the following tree, from regular expression
+   (<reg_exp>):
+	 SUBEXP
+	    |
+	<reg_exp>
+*/
+
+static bin_tree_t *
+parse_sub_exp (re_string_t *regexp, regex_t *preg, re_token_t *token,
+	       reg_syntax_t syntax, Idx nest, reg_errcode_t *err)
+{
+  re_dfa_t *dfa = preg->buffer;
+  bin_tree_t *tree;
+  size_t cur_nsub;
+  cur_nsub = preg->re_nsub++;
+
+  fetch_token (token, regexp, syntax | RE_CARET_ANCHORS_HERE);
+
+  /* The subexpression may be a null string.  */
+  if (token->type == OP_CLOSE_SUBEXP)
+    tree = NULL;
+  else
+    {
+      tree = parse_reg_exp (regexp, preg, token, syntax, nest, err);
+      if (__glibc_unlikely (*err == REG_NOERROR
+			    && token->type != OP_CLOSE_SUBEXP))
+	{
+	  if (tree != NULL)
+	    postorder (tree, free_tree, NULL);
+	  *err = REG_EPAREN;
+	}
+      if (__glibc_unlikely (*err != REG_NOERROR))
+	return NULL;
+    }
+
+  if (cur_nsub <= '9' - '1')
+    dfa->completed_bkref_map |= 1 << cur_nsub;
+
+  tree = create_tree (dfa, tree, NULL, SUBEXP);
+  if (__glibc_unlikely (tree == NULL))
+    {
+      *err = REG_ESPACE;
+      return NULL;
+    }
+  tree->token.opr.idx = cur_nsub;
+  return tree;
+}
+
+/* This function parse repetition operators like "*", "+", "{1,3}" etc.  */
+
+static bin_tree_t *
+parse_dup_op (bin_tree_t *elem, re_string_t *regexp, re_dfa_t *dfa,
+	      re_token_t *token, reg_syntax_t syntax, reg_errcode_t *err)
+{
+  bin_tree_t *tree = NULL, *old_tree = NULL;
+  Idx i, start, end, start_idx = re_string_cur_idx (regexp);
+  re_token_t start_token = *token;
+
+  if (token->type == OP_OPEN_DUP_NUM)
+    {
+      end = 0;
+      start = fetch_number (regexp, token, syntax);
+      if (start == -1)
+	{
+	  if (token->type == CHARACTER && token->opr.c == ',')
+	    start = 0; /* We treat "{,m}" as "{0,m}".  */
+	  else
+	    {
+	      *err = REG_BADBR; /* <re>{} is invalid.  */
+	      return NULL;
+	    }
+	}
+      if (__glibc_likely (start != -2))
+	{
+	  /* We treat "{n}" as "{n,n}".  */
+	  end = ((token->type == OP_CLOSE_DUP_NUM) ? start
+		 : ((token->type == CHARACTER && token->opr.c == ',')
+		    ? fetch_number (regexp, token, syntax) : -2));
+	}
+      if (__glibc_unlikely (start == -2 || end == -2))
+	{
+	  /* Invalid sequence.  */
+	  if (__glibc_unlikely (!(syntax & RE_INVALID_INTERVAL_ORD)))
+	    {
+	      if (token->type == END_OF_RE)
+		*err = REG_EBRACE;
+	      else
+		*err = REG_BADBR;
+
+	      return NULL;
+	    }
+
+	  /* If the syntax bit is set, rollback.  */
+	  re_string_set_index (regexp, start_idx);
+	  *token = start_token;
+	  token->type = CHARACTER;
+	  /* mb_partial and word_char bits should be already initialized by
+	     peek_token.  */
+	  return elem;
+	}
+
+      if (__glibc_unlikely ((end != -1 && start > end)
+			    || token->type != OP_CLOSE_DUP_NUM))
+	{
+	  /* First number greater than second.  */
+	  *err = REG_BADBR;
+	  return NULL;
+	}
+
+      if (__glibc_unlikely (RE_DUP_MAX < (end == -1 ? start : end)))
+	{
+	  *err = REG_ESIZE;
+	  return NULL;
+	}
+    }
+  else
+    {
+      start = (token->type == OP_DUP_PLUS) ? 1 : 0;
+      end = (token->type == OP_DUP_QUESTION) ? 1 : -1;
+    }
+
+  fetch_token (token, regexp, syntax);
+
+  if (__glibc_unlikely (elem == NULL))
+    return NULL;
+  if (__glibc_unlikely (start == 0 && end == 0))
+    {
+      postorder (elem, free_tree, NULL);
+      return NULL;
+    }
+
+  /* Extract "<re>{n,m}" to "<re><re>...<re><re>{0,<m-n>}".  */
+  if (__glibc_unlikely (start > 0))
+    {
+      tree = elem;
+      for (i = 2; i <= start; ++i)
+	{
+	  elem = duplicate_tree (elem, dfa);
+	  tree = create_tree (dfa, tree, elem, CONCAT);
+	  if (__glibc_unlikely (elem == NULL || tree == NULL))
+	    goto parse_dup_op_espace;
+	}
+
+      if (start == end)
+	return tree;
+
+      /* Duplicate ELEM before it is marked optional.  */
+      elem = duplicate_tree (elem, dfa);
+      if (__glibc_unlikely (elem == NULL))
+        goto parse_dup_op_espace;
+      old_tree = tree;
+    }
+  else
+    old_tree = NULL;
+
+  if (elem->token.type == SUBEXP)
+    {
+      uintptr_t subidx = elem->token.opr.idx;
+      postorder (elem, mark_opt_subexp, (void *) subidx);
+    }
+
+  tree = create_tree (dfa, elem, NULL,
+		      (end == -1 ? OP_DUP_ASTERISK : OP_ALT));
+  if (__glibc_unlikely (tree == NULL))
+    goto parse_dup_op_espace;
+
+  /* This loop is actually executed only when end != -1,
+     to rewrite <re>{0,n} as (<re>(<re>...<re>?)?)?...  We have
+     already created the start+1-th copy.  */
+  if (TYPE_SIGNED (Idx) || end != -1)
+    for (i = start + 2; i <= end; ++i)
+      {
+	elem = duplicate_tree (elem, dfa);
+	tree = create_tree (dfa, tree, elem, CONCAT);
+	if (__glibc_unlikely (elem == NULL || tree == NULL))
+	  goto parse_dup_op_espace;
+
+	tree = create_tree (dfa, tree, NULL, OP_ALT);
+	if (__glibc_unlikely (tree == NULL))
+	  goto parse_dup_op_espace;
+      }
+
+  if (old_tree)
+    tree = create_tree (dfa, old_tree, tree, CONCAT);
+
+  return tree;
+
+ parse_dup_op_espace:
+  *err = REG_ESPACE;
+  return NULL;
+}
+
+/* Size of the names for collating symbol/equivalence_class/character_class.
+   I'm not sure, but maybe enough.  */
+#define BRACKET_NAME_BUF_SIZE 32
+
+#ifndef _LIBC
+
+# ifdef RE_ENABLE_I18N
+/* Convert the byte B to the corresponding wide character.  In a
+   unibyte locale, treat B as itself.  In a multibyte locale, return
+   WEOF if B is an encoding error.  */
+static wint_t
+parse_byte (unsigned char b, re_charset_t *mbcset)
+{
+  return mbcset == NULL ? b : __btowc (b);
+}
+# endif
+
+  /* Local function for parse_bracket_exp only used in case of NOT _LIBC.
+     Build the range expression which starts from START_ELEM, and ends
+     at END_ELEM.  The result are written to MBCSET and SBCSET.
+     RANGE_ALLOC is the allocated size of mbcset->range_starts, and
+     mbcset->range_ends, is a pointer argument since we may
+     update it.  */
+
+static reg_errcode_t
+# ifdef RE_ENABLE_I18N
+build_range_exp (const reg_syntax_t syntax,
+                 bitset_t sbcset,
+                 re_charset_t *mbcset,
+                 Idx *range_alloc,
+                 const bracket_elem_t *start_elem,
+                 const bracket_elem_t *end_elem)
+# else /* not RE_ENABLE_I18N */
+build_range_exp (const reg_syntax_t syntax,
+                 bitset_t sbcset,
+                 const bracket_elem_t *start_elem,
+                 const bracket_elem_t *end_elem)
+# endif /* not RE_ENABLE_I18N */
+{
+  unsigned int start_ch, end_ch;
+  /* Equivalence Classes and Character Classes can't be a range start/end.  */
+  if (__glibc_unlikely (start_elem->type == EQUIV_CLASS
+			|| start_elem->type == CHAR_CLASS
+			|| end_elem->type == EQUIV_CLASS
+			|| end_elem->type == CHAR_CLASS))
+    return REG_ERANGE;
+
+  /* We can handle no multi character collating elements without libc
+     support.  */
+  if (__glibc_unlikely ((start_elem->type == COLL_SYM
+			 && strlen ((char *) start_elem->opr.name) > 1)
+			|| (end_elem->type == COLL_SYM
+			    && strlen ((char *) end_elem->opr.name) > 1)))
+    return REG_ECOLLATE;
+
+# ifdef RE_ENABLE_I18N
+  {
+    wchar_t wc;
+    wint_t start_wc;
+    wint_t end_wc;
+
+    start_ch = ((start_elem->type == SB_CHAR) ? start_elem->opr.ch
+		: ((start_elem->type == COLL_SYM) ? start_elem->opr.name[0]
+		   : 0));
+    end_ch = ((end_elem->type == SB_CHAR) ? end_elem->opr.ch
+	      : ((end_elem->type == COLL_SYM) ? end_elem->opr.name[0]
+		 : 0));
+    start_wc = ((start_elem->type == SB_CHAR || start_elem->type == COLL_SYM)
+		? parse_byte (start_ch, mbcset) : start_elem->opr.wch);
+    end_wc = ((end_elem->type == SB_CHAR || end_elem->type == COLL_SYM)
+	      ? parse_byte (end_ch, mbcset) : end_elem->opr.wch);
+    if (start_wc == WEOF || end_wc == WEOF)
+      return REG_ECOLLATE;
+    else if (__glibc_unlikely ((syntax & RE_NO_EMPTY_RANGES)
+			       && start_wc > end_wc))
+      return REG_ERANGE;
+
+    /* Got valid collation sequence values, add them as a new entry.
+       However, for !_LIBC we have no collation elements: if the
+       character set is single byte, the single byte character set
+       that we build below suffices.  parse_bracket_exp passes
+       no MBCSET if dfa->mb_cur_max == 1.  */
+    if (mbcset)
+      {
+	/* Check the space of the arrays.  */
+	if (__glibc_unlikely (*range_alloc == mbcset->nranges))
+	  {
+	    /* There is not enough space, need realloc.  */
+	    wchar_t *new_array_start, *new_array_end;
+	    Idx new_nranges;
+
+	    /* +1 in case of mbcset->nranges is 0.  */
+	    new_nranges = 2 * mbcset->nranges + 1;
+	    /* Use realloc since mbcset->range_starts and mbcset->range_ends
+	       are NULL if *range_alloc == 0.  */
+	    new_array_start = re_realloc (mbcset->range_starts, wchar_t,
+					  new_nranges);
+	    new_array_end = re_realloc (mbcset->range_ends, wchar_t,
+					new_nranges);
+
+	    if (__glibc_unlikely (new_array_start == NULL
+				  || new_array_end == NULL))
+	      {
+		re_free (new_array_start);
+		re_free (new_array_end);
+		return REG_ESPACE;
+	      }
+
+	    mbcset->range_starts = new_array_start;
+	    mbcset->range_ends = new_array_end;
+	    *range_alloc = new_nranges;
+	  }
+
+	mbcset->range_starts[mbcset->nranges] = start_wc;
+	mbcset->range_ends[mbcset->nranges++] = end_wc;
+      }
+
+    /* Build the table for single byte characters.  */
+    for (wc = 0; wc < SBC_MAX; ++wc)
+      {
+	if (start_wc <= wc && wc <= end_wc)
+	  bitset_set (sbcset, wc);
+      }
+  }
+# else /* not RE_ENABLE_I18N */
+  {
+    unsigned int ch;
+    start_ch = ((start_elem->type == SB_CHAR ) ? start_elem->opr.ch
+		: ((start_elem->type == COLL_SYM) ? start_elem->opr.name[0]
+		   : 0));
+    end_ch = ((end_elem->type == SB_CHAR ) ? end_elem->opr.ch
+	      : ((end_elem->type == COLL_SYM) ? end_elem->opr.name[0]
+		 : 0));
+    if (start_ch > end_ch)
+      return REG_ERANGE;
+    /* Build the table for single byte characters.  */
+    for (ch = 0; ch < SBC_MAX; ++ch)
+      if (start_ch <= ch  && ch <= end_ch)
+	bitset_set (sbcset, ch);
+  }
+# endif /* not RE_ENABLE_I18N */
+  return REG_NOERROR;
+}
+#endif /* not _LIBC */
+
+#ifndef _LIBC
+/* Helper function for parse_bracket_exp only used in case of NOT _LIBC..
+   Build the collating element which is represented by NAME.
+   The result are written to MBCSET and SBCSET.
+   COLL_SYM_ALLOC is the allocated size of mbcset->coll_sym, is a
+   pointer argument since we may update it.  */
+
+static reg_errcode_t
+# ifdef RE_ENABLE_I18N
+build_collating_symbol (bitset_t sbcset, re_charset_t *mbcset,
+			Idx *coll_sym_alloc, const unsigned char *name)
+# else /* not RE_ENABLE_I18N */
+build_collating_symbol (bitset_t sbcset, const unsigned char *name)
+# endif /* not RE_ENABLE_I18N */
+{
+  size_t name_len = strlen ((const char *) name);
+  if (__glibc_unlikely (name_len != 1))
+    return REG_ECOLLATE;
+  else
+    {
+      bitset_set (sbcset, name[0]);
+      return REG_NOERROR;
+    }
+}
+#endif /* not _LIBC */
+
+/* This function parse bracket expression like "[abc]", "[a-c]",
+   "[[.a-a.]]" etc.  */
+
+static bin_tree_t *
+parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
+		   reg_syntax_t syntax, reg_errcode_t *err)
+{
+#ifdef _LIBC
+  const unsigned char *collseqmb;
+  const char *collseqwc;
+  uint32_t nrules;
+  int32_t table_size;
+  const int32_t *symb_table;
+  const unsigned char *extra;
+
+  /* Local function for parse_bracket_exp used in _LIBC environment.
+     Seek the collating symbol entry corresponding to NAME.
+     Return the index of the symbol in the SYMB_TABLE,
+     or -1 if not found.  */
+
+  auto inline int32_t
+  __attribute__ ((always_inline))
+  seek_collating_symbol_entry (const unsigned char *name, size_t name_len)
+    {
+      int32_t elem;
+
+      for (elem = 0; elem < table_size; elem++)
+	if (symb_table[2 * elem] != 0)
+	  {
+	    int32_t idx = symb_table[2 * elem + 1];
+	    /* Skip the name of collating element name.  */
+	    idx += 1 + extra[idx];
+	    if (/* Compare the length of the name.  */
+		name_len == extra[idx]
+		/* Compare the name.  */
+		&& memcmp (name, &extra[idx + 1], name_len) == 0)
+	      /* Yep, this is the entry.  */
+	      return elem;
+	  }
+      return -1;
+    }
+
+  /* Local function for parse_bracket_exp used in _LIBC environment.
+     Look up the collation sequence value of BR_ELEM.
+     Return the value if succeeded, UINT_MAX otherwise.  */
+
+  auto inline unsigned int
+  __attribute__ ((always_inline))
+  lookup_collation_sequence_value (bracket_elem_t *br_elem)
+    {
+      if (br_elem->type == SB_CHAR)
+	{
+	  /*
+	  if (MB_CUR_MAX == 1)
+	  */
+	  if (nrules == 0)
+	    return collseqmb[br_elem->opr.ch];
+	  else
+	    {
+	      wint_t wc = __btowc (br_elem->opr.ch);
+	      return __collseq_table_lookup (collseqwc, wc);
+	    }
+	}
+      else if (br_elem->type == MB_CHAR)
+	{
+	  if (nrules != 0)
+	    return __collseq_table_lookup (collseqwc, br_elem->opr.wch);
+	}
+      else if (br_elem->type == COLL_SYM)
+	{
+	  size_t sym_name_len = strlen ((char *) br_elem->opr.name);
+	  if (nrules != 0)
+	    {
+	      int32_t elem, idx;
+	      elem = seek_collating_symbol_entry (br_elem->opr.name,
+						  sym_name_len);
+	      if (elem != -1)
+		{
+		  /* We found the entry.  */
+		  idx = symb_table[2 * elem + 1];
+		  /* Skip the name of collating element name.  */
+		  idx += 1 + extra[idx];
+		  /* Skip the byte sequence of the collating element.  */
+		  idx += 1 + extra[idx];
+		  /* Adjust for the alignment.  */
+		  idx = (idx + 3) & ~3;
+		  /* Skip the multibyte collation sequence value.  */
+		  idx += sizeof (unsigned int);
+		  /* Skip the wide char sequence of the collating element.  */
+		  idx += sizeof (unsigned int) *
+		    (1 + *(unsigned int *) (extra + idx));
+		  /* Return the collation sequence value.  */
+		  return *(unsigned int *) (extra + idx);
+		}
+	      else if (sym_name_len == 1)
+		{
+		  /* No valid character.  Match it as a single byte
+		     character.  */
+		  return collseqmb[br_elem->opr.name[0]];
+		}
+	    }
+	  else if (sym_name_len == 1)
+	    return collseqmb[br_elem->opr.name[0]];
+	}
+      return UINT_MAX;
+    }
+
+  /* Local function for parse_bracket_exp used in _LIBC environment.
+     Build the range expression which starts from START_ELEM, and ends
+     at END_ELEM.  The result are written to MBCSET and SBCSET.
+     RANGE_ALLOC is the allocated size of mbcset->range_starts, and
+     mbcset->range_ends, is a pointer argument since we may
+     update it.  */
+
+  auto inline reg_errcode_t
+  __attribute__ ((always_inline))
+  build_range_exp (bitset_t sbcset, re_charset_t *mbcset, int *range_alloc,
+		   bracket_elem_t *start_elem, bracket_elem_t *end_elem)
+    {
+      unsigned int ch;
+      uint32_t start_collseq;
+      uint32_t end_collseq;
+
+      /* Equivalence Classes and Character Classes can't be a range
+	 start/end.  */
+      if (__glibc_unlikely (start_elem->type == EQUIV_CLASS
+			    || start_elem->type == CHAR_CLASS
+			    || end_elem->type == EQUIV_CLASS
+			    || end_elem->type == CHAR_CLASS))
+	return REG_ERANGE;
+
+      /* FIXME: Implement rational ranges here, too.  */
+      start_collseq = lookup_collation_sequence_value (start_elem);
+      end_collseq = lookup_collation_sequence_value (end_elem);
+      /* Check start/end collation sequence values.  */
+      if (__glibc_unlikely (start_collseq == UINT_MAX
+			    || end_collseq == UINT_MAX))
+	return REG_ECOLLATE;
+      if (__glibc_unlikely ((syntax & RE_NO_EMPTY_RANGES)
+			    && start_collseq > end_collseq))
+	return REG_ERANGE;
+
+      /* Got valid collation sequence values, add them as a new entry.
+	 However, if we have no collation elements, and the character set
+	 is single byte, the single byte character set that we
+	 build below suffices. */
+      if (nrules > 0 || dfa->mb_cur_max > 1)
+	{
+	  /* Check the space of the arrays.  */
+	  if (__glibc_unlikely (*range_alloc == mbcset->nranges))
+	    {
+	      /* There is not enough space, need realloc.  */
+	      uint32_t *new_array_start;
+	      uint32_t *new_array_end;
+	      Idx new_nranges;
+
+	      /* +1 in case of mbcset->nranges is 0.  */
+	      new_nranges = 2 * mbcset->nranges + 1;
+	      new_array_start = re_realloc (mbcset->range_starts, uint32_t,
+					    new_nranges);
+	      new_array_end = re_realloc (mbcset->range_ends, uint32_t,
+					  new_nranges);
+
+	      if (__glibc_unlikely (new_array_start == NULL
+				    || new_array_end == NULL))
+		return REG_ESPACE;
+
+	      mbcset->range_starts = new_array_start;
+	      mbcset->range_ends = new_array_end;
+	      *range_alloc = new_nranges;
+	    }
+
+	  mbcset->range_starts[mbcset->nranges] = start_collseq;
+	  mbcset->range_ends[mbcset->nranges++] = end_collseq;
+	}
+
+      /* Build the table for single byte characters.  */
+      for (ch = 0; ch < SBC_MAX; ch++)
+	{
+	  uint32_t ch_collseq;
+	  /*
+	  if (MB_CUR_MAX == 1)
+	  */
+	  if (nrules == 0)
+	    ch_collseq = collseqmb[ch];
+	  else
+	    ch_collseq = __collseq_table_lookup (collseqwc, __btowc (ch));
+	  if (start_collseq <= ch_collseq && ch_collseq <= end_collseq)
+	    bitset_set (sbcset, ch);
+	}
+      return REG_NOERROR;
+    }
+
+  /* Local function for parse_bracket_exp used in _LIBC environment.
+     Build the collating element which is represented by NAME.
+     The result are written to MBCSET and SBCSET.
+     COLL_SYM_ALLOC is the allocated size of mbcset->coll_sym, is a
+     pointer argument since we may update it.  */
+
+  auto inline reg_errcode_t
+  __attribute__ ((always_inline))
+  build_collating_symbol (bitset_t sbcset, re_charset_t *mbcset,
+			  Idx *coll_sym_alloc, const unsigned char *name)
+    {
+      int32_t elem, idx;
+      size_t name_len = strlen ((const char *) name);
+      if (nrules != 0)
+	{
+	  elem = seek_collating_symbol_entry (name, name_len);
+	  if (elem != -1)
+	    {
+	      /* We found the entry.  */
+	      idx = symb_table[2 * elem + 1];
+	      /* Skip the name of collating element name.  */
+	      idx += 1 + extra[idx];
+	    }
+	  else if (name_len == 1)
+	    {
+	      /* No valid character, treat it as a normal
+		 character.  */
+	      bitset_set (sbcset, name[0]);
+	      return REG_NOERROR;
+	    }
+	  else
+	    return REG_ECOLLATE;
+
+	  /* Got valid collation sequence, add it as a new entry.  */
+	  /* Check the space of the arrays.  */
+	  if (__glibc_unlikely (*coll_sym_alloc == mbcset->ncoll_syms))
+	    {
+	      /* Not enough, realloc it.  */
+	      /* +1 in case of mbcset->ncoll_syms is 0.  */
+	      Idx new_coll_sym_alloc = 2 * mbcset->ncoll_syms + 1;
+	      /* Use realloc since mbcset->coll_syms is NULL
+		 if *alloc == 0.  */
+	      int32_t *new_coll_syms = re_realloc (mbcset->coll_syms, int32_t,
+						   new_coll_sym_alloc);
+	      if (__glibc_unlikely (new_coll_syms == NULL))
+		return REG_ESPACE;
+	      mbcset->coll_syms = new_coll_syms;
+	      *coll_sym_alloc = new_coll_sym_alloc;
+	    }
+	  mbcset->coll_syms[mbcset->ncoll_syms++] = idx;
+	  return REG_NOERROR;
+	}
+      else
+	{
+	  if (__glibc_unlikely (name_len != 1))
+	    return REG_ECOLLATE;
+	  else
+	    {
+	      bitset_set (sbcset, name[0]);
+	      return REG_NOERROR;
+	    }
+	}
+    }
+#endif
+
+  re_token_t br_token;
+  re_bitset_ptr_t sbcset;
+#ifdef RE_ENABLE_I18N
+  re_charset_t *mbcset;
+  Idx coll_sym_alloc = 0, range_alloc = 0, mbchar_alloc = 0;
+  Idx equiv_class_alloc = 0, char_class_alloc = 0;
+#endif /* not RE_ENABLE_I18N */
+  bool non_match = false;
+  bin_tree_t *work_tree;
+  int token_len;
+  bool first_round = true;
+#ifdef _LIBC
+  collseqmb = (const unsigned char *)
+    _NL_CURRENT (LC_COLLATE, _NL_COLLATE_COLLSEQMB);
+  nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
+  if (nrules)
+    {
+      /*
+      if (MB_CUR_MAX > 1)
+      */
+      collseqwc = _NL_CURRENT (LC_COLLATE, _NL_COLLATE_COLLSEQWC);
+      table_size = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_SYMB_HASH_SIZEMB);
+      symb_table = (const int32_t *) _NL_CURRENT (LC_COLLATE,
+						  _NL_COLLATE_SYMB_TABLEMB);
+      extra = (const unsigned char *) _NL_CURRENT (LC_COLLATE,
+						   _NL_COLLATE_SYMB_EXTRAMB);
+    }
+#endif
+  sbcset = (re_bitset_ptr_t) calloc (sizeof (bitset_t), 1);
+#ifdef RE_ENABLE_I18N
+  mbcset = (re_charset_t *) calloc (sizeof (re_charset_t), 1);
+#endif /* RE_ENABLE_I18N */
+#ifdef RE_ENABLE_I18N
+  if (__glibc_unlikely (sbcset == NULL || mbcset == NULL))
+#else
+  if (__glibc_unlikely (sbcset == NULL))
+#endif /* RE_ENABLE_I18N */
+    {
+      re_free (sbcset);
+#ifdef RE_ENABLE_I18N
+      re_free (mbcset);
+#endif
+      *err = REG_ESPACE;
+      return NULL;
+    }
+
+  token_len = peek_token_bracket (token, regexp, syntax);
+  if (__glibc_unlikely (token->type == END_OF_RE))
+    {
+      *err = REG_BADPAT;
+      goto parse_bracket_exp_free_return;
+    }
+  if (token->type == OP_NON_MATCH_LIST)
+    {
+#ifdef RE_ENABLE_I18N
+      mbcset->non_match = 1;
+#endif /* not RE_ENABLE_I18N */
+      non_match = true;
+      if (syntax & RE_HAT_LISTS_NOT_NEWLINE)
+	bitset_set (sbcset, '\n');
+      re_string_skip_bytes (regexp, token_len); /* Skip a token.  */
+      token_len = peek_token_bracket (token, regexp, syntax);
+      if (__glibc_unlikely (token->type == END_OF_RE))
+	{
+	  *err = REG_BADPAT;
+	  goto parse_bracket_exp_free_return;
+	}
+    }
+
+  /* We treat the first ']' as a normal character.  */
+  if (token->type == OP_CLOSE_BRACKET)
+    token->type = CHARACTER;
+
+  while (1)
+    {
+      bracket_elem_t start_elem, end_elem;
+      unsigned char start_name_buf[BRACKET_NAME_BUF_SIZE];
+      unsigned char end_name_buf[BRACKET_NAME_BUF_SIZE];
+      reg_errcode_t ret;
+      int token_len2 = 0;
+      bool is_range_exp = false;
+      re_token_t token2;
+
+      start_elem.opr.name = start_name_buf;
+      start_elem.type = COLL_SYM;
+      ret = parse_bracket_element (&start_elem, regexp, token, token_len, dfa,
+				   syntax, first_round);
+      if (__glibc_unlikely (ret != REG_NOERROR))
+	{
+	  *err = ret;
+	  goto parse_bracket_exp_free_return;
+	}
+      first_round = false;
+
+      /* Get information about the next token.  We need it in any case.  */
+      token_len = peek_token_bracket (token, regexp, syntax);
+
+      /* Do not check for ranges if we know they are not allowed.  */
+      if (start_elem.type != CHAR_CLASS && start_elem.type != EQUIV_CLASS)
+	{
+	  if (__glibc_unlikely (token->type == END_OF_RE))
+	    {
+	      *err = REG_EBRACK;
+	      goto parse_bracket_exp_free_return;
+	    }
+	  if (token->type == OP_CHARSET_RANGE)
+	    {
+	      re_string_skip_bytes (regexp, token_len); /* Skip '-'.  */
+	      token_len2 = peek_token_bracket (&token2, regexp, syntax);
+	      if (__glibc_unlikely (token2.type == END_OF_RE))
+		{
+		  *err = REG_EBRACK;
+		  goto parse_bracket_exp_free_return;
+		}
+	      if (token2.type == OP_CLOSE_BRACKET)
+		{
+		  /* We treat the last '-' as a normal character.  */
+		  re_string_skip_bytes (regexp, -token_len);
+		  token->type = CHARACTER;
+		}
+	      else
+		is_range_exp = true;
+	    }
+	}
+
+      if (is_range_exp == true)
+	{
+	  end_elem.opr.name = end_name_buf;
+	  end_elem.type = COLL_SYM;
+	  ret = parse_bracket_element (&end_elem, regexp, &token2, token_len2,
+				       dfa, syntax, true);
+	  if (__glibc_unlikely (ret != REG_NOERROR))
+	    {
+	      *err = ret;
+	      goto parse_bracket_exp_free_return;
+	    }
+
+	  token_len = peek_token_bracket (token, regexp, syntax);
+
+#ifdef _LIBC
+	  *err = build_range_exp (sbcset, mbcset, &range_alloc,
+				  &start_elem, &end_elem);
+#else
+# ifdef RE_ENABLE_I18N
+	  *err = build_range_exp (syntax, sbcset,
+				  dfa->mb_cur_max > 1 ? mbcset : NULL,
+				  &range_alloc, &start_elem, &end_elem);
+# else
+	  *err = build_range_exp (syntax, sbcset, &start_elem, &end_elem);
+# endif
+#endif /* RE_ENABLE_I18N */
+	  if (__glibc_unlikely (*err != REG_NOERROR))
+	    goto parse_bracket_exp_free_return;
+	}
+      else
+	{
+	  switch (start_elem.type)
+	    {
+	    case SB_CHAR:
+	      bitset_set (sbcset, start_elem.opr.ch);
+	      break;
+#ifdef RE_ENABLE_I18N
+	    case MB_CHAR:
+	      /* Check whether the array has enough space.  */
+	      if (__glibc_unlikely (mbchar_alloc == mbcset->nmbchars))
+		{
+		  wchar_t *new_mbchars;
+		  /* Not enough, realloc it.  */
+		  /* +1 in case of mbcset->nmbchars is 0.  */
+		  mbchar_alloc = 2 * mbcset->nmbchars + 1;
+		  /* Use realloc since array is NULL if *alloc == 0.  */
+		  new_mbchars = re_realloc (mbcset->mbchars, wchar_t,
+					    mbchar_alloc);
+		  if (__glibc_unlikely (new_mbchars == NULL))
+		    goto parse_bracket_exp_espace;
+		  mbcset->mbchars = new_mbchars;
+		}
+	      mbcset->mbchars[mbcset->nmbchars++] = start_elem.opr.wch;
+	      break;
+#endif /* RE_ENABLE_I18N */
+	    case EQUIV_CLASS:
+	      *err = build_equiv_class (sbcset,
+#ifdef RE_ENABLE_I18N
+					mbcset, &equiv_class_alloc,
+#endif /* RE_ENABLE_I18N */
+					start_elem.opr.name);
+	      if (__glibc_unlikely (*err != REG_NOERROR))
+		goto parse_bracket_exp_free_return;
+	      break;
+	    case COLL_SYM:
+	      *err = build_collating_symbol (sbcset,
+#ifdef RE_ENABLE_I18N
+					     mbcset, &coll_sym_alloc,
+#endif /* RE_ENABLE_I18N */
+					     start_elem.opr.name);
+	      if (__glibc_unlikely (*err != REG_NOERROR))
+		goto parse_bracket_exp_free_return;
+	      break;
+	    case CHAR_CLASS:
+	      *err = build_charclass (regexp->trans, sbcset,
+#ifdef RE_ENABLE_I18N
+				      mbcset, &char_class_alloc,
+#endif /* RE_ENABLE_I18N */
+				      (const char *) start_elem.opr.name,
+				      syntax);
+	      if (__glibc_unlikely (*err != REG_NOERROR))
+	       goto parse_bracket_exp_free_return;
+	      break;
+	    default:
+	      DEBUG_ASSERT (false);
+	      break;
+	    }
+	}
+      if (__glibc_unlikely (token->type == END_OF_RE))
+	{
+	  *err = REG_EBRACK;
+	  goto parse_bracket_exp_free_return;
+	}
+      if (token->type == OP_CLOSE_BRACKET)
+	break;
+    }
+
+  re_string_skip_bytes (regexp, token_len); /* Skip a token.  */
+
+  /* If it is non-matching list.  */
+  if (non_match)
+    bitset_not (sbcset);
+
+#ifdef RE_ENABLE_I18N
+  /* Ensure only single byte characters are set.  */
+  if (dfa->mb_cur_max > 1)
+    bitset_mask (sbcset, dfa->sb_char);
+
+  if (mbcset->nmbchars || mbcset->ncoll_syms || mbcset->nequiv_classes
+      || mbcset->nranges || (dfa->mb_cur_max > 1 && (mbcset->nchar_classes
+						     || mbcset->non_match)))
+    {
+      bin_tree_t *mbc_tree;
+      int sbc_idx;
+      /* Build a tree for complex bracket.  */
+      dfa->has_mb_node = 1;
+      br_token.type = COMPLEX_BRACKET;
+      br_token.opr.mbcset = mbcset;
+      mbc_tree = create_token_tree (dfa, NULL, NULL, &br_token);
+      if (__glibc_unlikely (mbc_tree == NULL))
+	goto parse_bracket_exp_espace;
+      for (sbc_idx = 0; sbc_idx < BITSET_WORDS; ++sbc_idx)
+	if (sbcset[sbc_idx])
+	  break;
+      /* If there are no bits set in sbcset, there is no point
+	 of having both SIMPLE_BRACKET and COMPLEX_BRACKET.  */
+      if (sbc_idx < BITSET_WORDS)
+	{
+	  /* Build a tree for simple bracket.  */
+	  br_token.type = SIMPLE_BRACKET;
+	  br_token.opr.sbcset = sbcset;
+	  work_tree = create_token_tree (dfa, NULL, NULL, &br_token);
+	  if (__glibc_unlikely (work_tree == NULL))
+	    goto parse_bracket_exp_espace;
+
+	  /* Then join them by ALT node.  */
+	  work_tree = create_tree (dfa, work_tree, mbc_tree, OP_ALT);
+	  if (__glibc_unlikely (work_tree == NULL))
+	    goto parse_bracket_exp_espace;
+	}
+      else
+	{
+	  re_free (sbcset);
+	  work_tree = mbc_tree;
+	}
+    }
+  else
+#endif /* not RE_ENABLE_I18N */
+    {
+#ifdef RE_ENABLE_I18N
+      free_charset (mbcset);
+#endif
+      /* Build a tree for simple bracket.  */
+      br_token.type = SIMPLE_BRACKET;
+      br_token.opr.sbcset = sbcset;
+      work_tree = create_token_tree (dfa, NULL, NULL, &br_token);
+      if (__glibc_unlikely (work_tree == NULL))
+	goto parse_bracket_exp_espace;
+    }
+  return work_tree;
+
+ parse_bracket_exp_espace:
+  *err = REG_ESPACE;
+ parse_bracket_exp_free_return:
+  re_free (sbcset);
+#ifdef RE_ENABLE_I18N
+  free_charset (mbcset);
+#endif /* RE_ENABLE_I18N */
+  return NULL;
+}
+
+/* Parse an element in the bracket expression.  */
+
+static reg_errcode_t
+parse_bracket_element (bracket_elem_t *elem, re_string_t *regexp,
+		       re_token_t *token, int token_len, re_dfa_t *dfa,
+		       reg_syntax_t syntax, bool accept_hyphen)
+{
+#ifdef RE_ENABLE_I18N
+  int cur_char_size;
+  cur_char_size = re_string_char_size_at (regexp, re_string_cur_idx (regexp));
+  if (cur_char_size > 1)
+    {
+      elem->type = MB_CHAR;
+      elem->opr.wch = re_string_wchar_at (regexp, re_string_cur_idx (regexp));
+      re_string_skip_bytes (regexp, cur_char_size);
+      return REG_NOERROR;
+    }
+#endif /* RE_ENABLE_I18N */
+  re_string_skip_bytes (regexp, token_len); /* Skip a token.  */
+  if (token->type == OP_OPEN_COLL_ELEM || token->type == OP_OPEN_CHAR_CLASS
+      || token->type == OP_OPEN_EQUIV_CLASS)
+    return parse_bracket_symbol (elem, regexp, token);
+  if (__glibc_unlikely (token->type == OP_CHARSET_RANGE) && !accept_hyphen)
+    {
+      /* A '-' must only appear as anything but a range indicator before
+	 the closing bracket.  Everything else is an error.  */
+      re_token_t token2;
+      (void) peek_token_bracket (&token2, regexp, syntax);
+      if (token2.type != OP_CLOSE_BRACKET)
+	/* The actual error value is not standardized since this whole
+	   case is undefined.  But ERANGE makes good sense.  */
+	return REG_ERANGE;
+    }
+  elem->type = SB_CHAR;
+  elem->opr.ch = token->opr.c;
+  return REG_NOERROR;
+}
+
+/* Parse a bracket symbol in the bracket expression.  Bracket symbols are
+   such as [:<character_class>:], [.<collating_element>.], and
+   [=<equivalent_class>=].  */
+
+static reg_errcode_t
+parse_bracket_symbol (bracket_elem_t *elem, re_string_t *regexp,
+		      re_token_t *token)
+{
+  unsigned char ch, delim = token->opr.c;
+  int i = 0;
+  if (re_string_eoi(regexp))
+    return REG_EBRACK;
+  for (;; ++i)
+    {
+      if (i >= BRACKET_NAME_BUF_SIZE)
+	return REG_EBRACK;
+      if (token->type == OP_OPEN_CHAR_CLASS)
+	ch = re_string_fetch_byte_case (regexp);
+      else
+	ch = re_string_fetch_byte (regexp);
+      if (re_string_eoi(regexp))
+	return REG_EBRACK;
+      if (ch == delim && re_string_peek_byte (regexp, 0) == ']')
+	break;
+      elem->opr.name[i] = ch;
+    }
+  re_string_skip_bytes (regexp, 1);
+  elem->opr.name[i] = '\0';
+  switch (token->type)
+    {
+    case OP_OPEN_COLL_ELEM:
+      elem->type = COLL_SYM;
+      break;
+    case OP_OPEN_EQUIV_CLASS:
+      elem->type = EQUIV_CLASS;
+      break;
+    case OP_OPEN_CHAR_CLASS:
+      elem->type = CHAR_CLASS;
+      break;
+    default:
+      break;
+    }
+  return REG_NOERROR;
+}
+
+  /* Helper function for parse_bracket_exp.
+     Build the equivalence class which is represented by NAME.
+     The result are written to MBCSET and SBCSET.
+     EQUIV_CLASS_ALLOC is the allocated size of mbcset->equiv_classes,
+     is a pointer argument since we may update it.  */
+
+static reg_errcode_t
+#ifdef RE_ENABLE_I18N
+build_equiv_class (bitset_t sbcset, re_charset_t *mbcset,
+		   Idx *equiv_class_alloc, const unsigned char *name)
+#else /* not RE_ENABLE_I18N */
+build_equiv_class (bitset_t sbcset, const unsigned char *name)
+#endif /* not RE_ENABLE_I18N */
+{
+#ifdef _LIBC
+  uint32_t nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
+  if (nrules != 0)
+    {
+      const int32_t *table, *indirect;
+      const unsigned char *weights, *extra, *cp;
+      unsigned char char_buf[2];
+      int32_t idx1, idx2;
+      unsigned int ch;
+      size_t len;
+      /* Calculate the index for equivalence class.  */
+      cp = name;
+      table = (const int32_t *) _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEMB);
+      weights = (const unsigned char *) _NL_CURRENT (LC_COLLATE,
+					       _NL_COLLATE_WEIGHTMB);
+      extra = (const unsigned char *) _NL_CURRENT (LC_COLLATE,
+						   _NL_COLLATE_EXTRAMB);
+      indirect = (const int32_t *) _NL_CURRENT (LC_COLLATE,
+						_NL_COLLATE_INDIRECTMB);
+      idx1 = findidx (table, indirect, extra, &cp, -1);
+      if (__glibc_unlikely (idx1 == 0 || *cp != '\0'))
+	/* This isn't a valid character.  */
+	return REG_ECOLLATE;
+
+      /* Build single byte matching table for this equivalence class.  */
+      len = weights[idx1 & 0xffffff];
+      for (ch = 0; ch < SBC_MAX; ++ch)
+	{
+	  char_buf[0] = ch;
+	  cp = char_buf;
+	  idx2 = findidx (table, indirect, extra, &cp, 1);
+/*
+	  idx2 = table[ch];
+*/
+	  if (idx2 == 0)
+	    /* This isn't a valid character.  */
+	    continue;
+	  /* Compare only if the length matches and the collation rule
+	     index is the same.  */
+	  if (len == weights[idx2 & 0xffffff] && (idx1 >> 24) == (idx2 >> 24)
+	      && memcmp (weights + (idx1 & 0xffffff) + 1,
+			 weights + (idx2 & 0xffffff) + 1, len) == 0)
+	    bitset_set (sbcset, ch);
+	}
+      /* Check whether the array has enough space.  */
+      if (__glibc_unlikely (*equiv_class_alloc == mbcset->nequiv_classes))
+	{
+	  /* Not enough, realloc it.  */
+	  /* +1 in case of mbcset->nequiv_classes is 0.  */
+	  Idx new_equiv_class_alloc = 2 * mbcset->nequiv_classes + 1;
+	  /* Use realloc since the array is NULL if *alloc == 0.  */
+	  int32_t *new_equiv_classes = re_realloc (mbcset->equiv_classes,
+						   int32_t,
+						   new_equiv_class_alloc);
+	  if (__glibc_unlikely (new_equiv_classes == NULL))
+	    return REG_ESPACE;
+	  mbcset->equiv_classes = new_equiv_classes;
+	  *equiv_class_alloc = new_equiv_class_alloc;
+	}
+      mbcset->equiv_classes[mbcset->nequiv_classes++] = idx1;
+    }
+  else
+#endif /* _LIBC */
+    {
+      if (__glibc_unlikely (strlen ((const char *) name) != 1))
+	return REG_ECOLLATE;
+      bitset_set (sbcset, *name);
+    }
+  return REG_NOERROR;
+}
+
+  /* Helper function for parse_bracket_exp.
+     Build the character class which is represented by NAME.
+     The result are written to MBCSET and SBCSET.
+     CHAR_CLASS_ALLOC is the allocated size of mbcset->char_classes,
+     is a pointer argument since we may update it.  */
+
+static reg_errcode_t
+#ifdef RE_ENABLE_I18N
+build_charclass (RE_TRANSLATE_TYPE trans, bitset_t sbcset,
+		 re_charset_t *mbcset, Idx *char_class_alloc,
+		 const char *class_name, reg_syntax_t syntax)
+#else /* not RE_ENABLE_I18N */
+build_charclass (RE_TRANSLATE_TYPE trans, bitset_t sbcset,
+		 const char *class_name, reg_syntax_t syntax)
+#endif /* not RE_ENABLE_I18N */
+{
+  int i;
+  const char *name = class_name;
+
+  /* In case of REG_ICASE "upper" and "lower" match the both of
+     upper and lower cases.  */
+  if ((syntax & RE_ICASE)
+      && (strcmp (name, "upper") == 0 || strcmp (name, "lower") == 0))
+    name = "alpha";
+
+#ifdef RE_ENABLE_I18N
+  /* Check the space of the arrays.  */
+  if (__glibc_unlikely (*char_class_alloc == mbcset->nchar_classes))
+    {
+      /* Not enough, realloc it.  */
+      /* +1 in case of mbcset->nchar_classes is 0.  */
+      Idx new_char_class_alloc = 2 * mbcset->nchar_classes + 1;
+      /* Use realloc since array is NULL if *alloc == 0.  */
+      wctype_t *new_char_classes = re_realloc (mbcset->char_classes, wctype_t,
+					       new_char_class_alloc);
+      if (__glibc_unlikely (new_char_classes == NULL))
+	return REG_ESPACE;
+      mbcset->char_classes = new_char_classes;
+      *char_class_alloc = new_char_class_alloc;
+    }
+  mbcset->char_classes[mbcset->nchar_classes++] = __wctype (name);
+#endif /* RE_ENABLE_I18N */
+
+#define BUILD_CHARCLASS_LOOP(ctype_func)	\
+  do {						\
+    if (__glibc_unlikely (trans != NULL))			\
+      {						\
+	for (i = 0; i < SBC_MAX; ++i)		\
+	  if (ctype_func (i))			\
+	    bitset_set (sbcset, trans[i]);	\
+      }						\
+    else					\
+      {						\
+	for (i = 0; i < SBC_MAX; ++i)		\
+	  if (ctype_func (i))			\
+	    bitset_set (sbcset, i);		\
+      }						\
+  } while (0)
+
+  if (strcmp (name, "alnum") == 0)
+    BUILD_CHARCLASS_LOOP (isalnum);
+  else if (strcmp (name, "cntrl") == 0)
+    BUILD_CHARCLASS_LOOP (iscntrl);
+  else if (strcmp (name, "lower") == 0)
+    BUILD_CHARCLASS_LOOP (islower);
+  else if (strcmp (name, "space") == 0)
+    BUILD_CHARCLASS_LOOP (isspace);
+  else if (strcmp (name, "alpha") == 0)
+    BUILD_CHARCLASS_LOOP (isalpha);
+  else if (strcmp (name, "digit") == 0)
+    BUILD_CHARCLASS_LOOP (isdigit);
+  else if (strcmp (name, "print") == 0)
+    BUILD_CHARCLASS_LOOP (isprint);
+  else if (strcmp (name, "upper") == 0)
+    BUILD_CHARCLASS_LOOP (isupper);
+  else if (strcmp (name, "blank") == 0)
+    BUILD_CHARCLASS_LOOP (isblank);
+  else if (strcmp (name, "graph") == 0)
+    BUILD_CHARCLASS_LOOP (isgraph);
+  else if (strcmp (name, "punct") == 0)
+    BUILD_CHARCLASS_LOOP (ispunct);
+  else if (strcmp (name, "xdigit") == 0)
+    BUILD_CHARCLASS_LOOP (isxdigit);
+  else
+    return REG_ECTYPE;
+
+  return REG_NOERROR;
+}
+
+static bin_tree_t *
+build_charclass_op (re_dfa_t *dfa, RE_TRANSLATE_TYPE trans,
+		    const char *class_name,
+		    const char *extra, bool non_match,
+		    reg_errcode_t *err)
+{
+  re_bitset_ptr_t sbcset;
+#ifdef RE_ENABLE_I18N
+  re_charset_t *mbcset;
+  Idx alloc = 0;
+#endif /* not RE_ENABLE_I18N */
+  reg_errcode_t ret;
+  bin_tree_t *tree;
+
+  sbcset = (re_bitset_ptr_t) calloc (sizeof (bitset_t), 1);
+  if (__glibc_unlikely (sbcset == NULL))
+    {
+      *err = REG_ESPACE;
+      return NULL;
+    }
+#ifdef RE_ENABLE_I18N
+  mbcset = (re_charset_t *) calloc (sizeof (re_charset_t), 1);
+  if (__glibc_unlikely (mbcset == NULL))
+    {
+      re_free (sbcset);
+      *err = REG_ESPACE;
+      return NULL;
+    }
+  mbcset->non_match = non_match;
+#endif /* RE_ENABLE_I18N */
+
+  /* We don't care the syntax in this case.  */
+  ret = build_charclass (trans, sbcset,
+#ifdef RE_ENABLE_I18N
+			 mbcset, &alloc,
+#endif /* RE_ENABLE_I18N */
+			 class_name, 0);
+
+  if (__glibc_unlikely (ret != REG_NOERROR))
+    {
+      re_free (sbcset);
+#ifdef RE_ENABLE_I18N
+      free_charset (mbcset);
+#endif /* RE_ENABLE_I18N */
+      *err = ret;
+      return NULL;
+    }
+  /* \w match '_' also.  */
+  for (; *extra; extra++)
+    bitset_set (sbcset, *extra);
+
+  /* If it is non-matching list.  */
+  if (non_match)
+    bitset_not (sbcset);
+
+#ifdef RE_ENABLE_I18N
+  /* Ensure only single byte characters are set.  */
+  if (dfa->mb_cur_max > 1)
+    bitset_mask (sbcset, dfa->sb_char);
+#endif
+
+  /* Build a tree for simple bracket.  */
+  re_token_t br_token = { .type = SIMPLE_BRACKET, .opr.sbcset = sbcset };
+  tree = create_token_tree (dfa, NULL, NULL, &br_token);
+  if (__glibc_unlikely (tree == NULL))
+    goto build_word_op_espace;
+
+#ifdef RE_ENABLE_I18N
+  if (dfa->mb_cur_max > 1)
+    {
+      bin_tree_t *mbc_tree;
+      /* Build a tree for complex bracket.  */
+      br_token.type = COMPLEX_BRACKET;
+      br_token.opr.mbcset = mbcset;
+      dfa->has_mb_node = 1;
+      mbc_tree = create_token_tree (dfa, NULL, NULL, &br_token);
+      if (__glibc_unlikely (mbc_tree == NULL))
+	goto build_word_op_espace;
+      /* Then join them by ALT node.  */
+      tree = create_tree (dfa, tree, mbc_tree, OP_ALT);
+      if (__glibc_likely (mbc_tree != NULL))
+	return tree;
+    }
+  else
+    {
+      free_charset (mbcset);
+      return tree;
+    }
+#else /* not RE_ENABLE_I18N */
+  return tree;
+#endif /* not RE_ENABLE_I18N */
+
+ build_word_op_espace:
+  re_free (sbcset);
+#ifdef RE_ENABLE_I18N
+  free_charset (mbcset);
+#endif /* RE_ENABLE_I18N */
+  *err = REG_ESPACE;
+  return NULL;
+}
+
+/* This is intended for the expressions like "a{1,3}".
+   Fetch a number from 'input', and return the number.
+   Return -1 if the number field is empty like "{,1}".
+   Return RE_DUP_MAX + 1 if the number field is too large.
+   Return -2 if an error occurred.  */
+
+static Idx
+fetch_number (re_string_t *input, re_token_t *token, reg_syntax_t syntax)
+{
+  Idx num = -1;
+  unsigned char c;
+  while (1)
+    {
+      fetch_token (token, input, syntax);
+      c = token->opr.c;
+      if (__glibc_unlikely (token->type == END_OF_RE))
+	return -2;
+      if (token->type == OP_CLOSE_DUP_NUM || c == ',')
+	break;
+      num = ((token->type != CHARACTER || c < '0' || '9' < c || num == -2)
+	     ? -2
+	     : num == -1
+	     ? c - '0'
+	     : MIN (RE_DUP_MAX + 1, num * 10 + c - '0'));
+    }
+  return num;
+}
+
+#ifdef RE_ENABLE_I18N
+static void
+free_charset (re_charset_t *cset)
+{
+  re_free (cset->mbchars);
+# ifdef _LIBC
+  re_free (cset->coll_syms);
+  re_free (cset->equiv_classes);
+# endif
+  re_free (cset->range_starts);
+  re_free (cset->range_ends);
+  re_free (cset->char_classes);
+  re_free (cset);
+}
+#endif /* RE_ENABLE_I18N */
+
+/* Functions for binary tree operation.  */
+
+/* Create a tree node.  */
+
+static bin_tree_t *
+create_tree (re_dfa_t *dfa, bin_tree_t *left, bin_tree_t *right,
+	     re_token_type_t type)
+{
+  re_token_t t = { .type = type };
+  return create_token_tree (dfa, left, right, &t);
+}
+
+static bin_tree_t *
+create_token_tree (re_dfa_t *dfa, bin_tree_t *left, bin_tree_t *right,
+		   const re_token_t *token)
+{
+  bin_tree_t *tree;
+  if (__glibc_unlikely (dfa->str_tree_storage_idx == BIN_TREE_STORAGE_SIZE))
+    {
+      bin_tree_storage_t *storage = re_malloc (bin_tree_storage_t, 1);
+
+      if (storage == NULL)
+	return NULL;
+      storage->next = dfa->str_tree_storage;
+      dfa->str_tree_storage = storage;
+      dfa->str_tree_storage_idx = 0;
+    }
+  tree = &dfa->str_tree_storage->data[dfa->str_tree_storage_idx++];
+
+  tree->parent = NULL;
+  tree->left = left;
+  tree->right = right;
+  tree->token = *token;
+  tree->token.duplicated = 0;
+  tree->token.opt_subexp = 0;
+  tree->first = NULL;
+  tree->next = NULL;
+  tree->node_idx = -1;
+
+  if (left != NULL)
+    left->parent = tree;
+  if (right != NULL)
+    right->parent = tree;
+  return tree;
+}
+
+/* Mark the tree SRC as an optional subexpression.
+   To be called from preorder or postorder.  */
+
+static reg_errcode_t
+mark_opt_subexp (void *extra, bin_tree_t *node)
+{
+  Idx idx = (uintptr_t) extra;
+  if (node->token.type == SUBEXP && node->token.opr.idx == idx)
+    node->token.opt_subexp = 1;
+
+  return REG_NOERROR;
+}
+
+/* Free the allocated memory inside NODE. */
+
+static void
+free_token (re_token_t *node)
+{
+#ifdef RE_ENABLE_I18N
+  if (node->type == COMPLEX_BRACKET && node->duplicated == 0)
+    free_charset (node->opr.mbcset);
+  else
+#endif /* RE_ENABLE_I18N */
+    if (node->type == SIMPLE_BRACKET && node->duplicated == 0)
+      re_free (node->opr.sbcset);
+}
+
+/* Worker function for tree walking.  Free the allocated memory inside NODE
+   and its children. */
+
+static reg_errcode_t
+free_tree (void *extra, bin_tree_t *node)
+{
+  free_token (&node->token);
+  return REG_NOERROR;
+}
+
+
+/* Duplicate the node SRC, and return new node.  This is a preorder
+   visit similar to the one implemented by the generic visitor, but
+   we need more infrastructure to maintain two parallel trees --- so,
+   it's easier to duplicate.  */
+
+static bin_tree_t *
+duplicate_tree (const bin_tree_t *root, re_dfa_t *dfa)
+{
+  const bin_tree_t *node;
+  bin_tree_t *dup_root;
+  bin_tree_t **p_new = &dup_root, *dup_node = root->parent;
+
+  for (node = root; ; )
+    {
+      /* Create a new tree and link it back to the current parent.  */
+      *p_new = create_token_tree (dfa, NULL, NULL, &node->token);
+      if (*p_new == NULL)
+	return NULL;
+      (*p_new)->parent = dup_node;
+      (*p_new)->token.duplicated = 1;
+      dup_node = *p_new;
+
+      /* Go to the left node, or up and to the right.  */
+      if (node->left)
+	{
+	  node = node->left;
+	  p_new = &dup_node->left;
+	}
+      else
+	{
+	  const bin_tree_t *prev = NULL;
+	  while (node->right == prev || node->right == NULL)
+	    {
+	      prev = node;
+	      node = node->parent;
+	      dup_node = dup_node->parent;
+	      if (!node)
+		return dup_root;
+	    }
+	  node = node->right;
+	  p_new = &dup_node->right;
+	}
+    }
+}
diff --git a/src/grep/lib/regex.c b/src/grep/lib/regex.c
new file mode 100644
index 0000000..7296be0
--- /dev/null
+++ b/src/grep/lib/regex.c
@@ -0,0 +1,83 @@
+/* Extended regular expression matching and search library.
+   Copyright (C) 2002-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#define __STDC_WANT_IEC_60559_BFP_EXT__
+
+#ifndef _LIBC
+# include <libc-config.h>
+
+# if __GNUC_PREREQ (4, 6)
+#  pragma GCC diagnostic ignored "-Wsuggest-attribute=pure"
+# endif
+# if __GNUC_PREREQ (4, 3)
+#  pragma GCC diagnostic ignored "-Wold-style-definition"
+#  pragma GCC diagnostic ignored "-Wtype-limits"
+# endif
+#endif
+
+/* Make sure no one compiles this code with a C++ compiler.  */
+#if defined __cplusplus && defined _LIBC
+# error "This is C code, use a C compiler"
+#endif
+
+#ifdef _LIBC
+/* We have to keep the namespace clean.  */
+# define regfree(preg) __regfree (preg)
+# define regexec(pr, st, nm, pm, ef) __regexec (pr, st, nm, pm, ef)
+# define regcomp(preg, pattern, cflags) __regcomp (preg, pattern, cflags)
+# define regerror(errcode, preg, errbuf, errbuf_size) \
+	__regerror(errcode, preg, errbuf, errbuf_size)
+# define re_set_registers(bu, re, nu, st, en) \
+	__re_set_registers (bu, re, nu, st, en)
+# define re_match_2(bufp, string1, size1, string2, size2, pos, regs, stop) \
+	__re_match_2 (bufp, string1, size1, string2, size2, pos, regs, stop)
+# define re_match(bufp, string, size, pos, regs) \
+	__re_match (bufp, string, size, pos, regs)
+# define re_search(bufp, string, size, startpos, range, regs) \
+	__re_search (bufp, string, size, startpos, range, regs)
+# define re_compile_pattern(pattern, length, bufp) \
+	__re_compile_pattern (pattern, length, bufp)
+# define re_set_syntax(syntax) __re_set_syntax (syntax)
+# define re_search_2(bufp, st1, s1, st2, s2, startpos, range, regs, stop) \
+	__re_search_2 (bufp, st1, s1, st2, s2, startpos, range, regs, stop)
+# define re_compile_fastmap(bufp) __re_compile_fastmap (bufp)
+
+# include "../locale/localeinfo.h"
+#endif
+
+/* On some systems, limits.h sets RE_DUP_MAX to a lower value than
+   GNU regex allows.  Include it before <regex.h>, which correctly
+   #undefs RE_DUP_MAX and sets it to the right value.  */
+#include <limits.h>
+
+#include <regex.h>
+#include "regex_internal.h"
+
+#include "regex_internal.c"
+#include "regcomp.c"
+#include "regexec.c"
+
+/* Binary backward compatibility.  */
+#if _LIBC
+# include <shlib-compat.h>
+# if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3)
+link_warning (re_max_failures, "the 're_max_failures' variable is obsolete and will go away.")
+int re_max_failures = 2000;
+# endif
+#endif
diff --git a/src/grep/lib/regex.h b/src/grep/lib/regex.h
new file mode 100644
index 0000000..8e4ef45
--- /dev/null
+++ b/src/grep/lib/regex.h
@@ -0,0 +1,663 @@
+/* Definitions for data structures and routines for the regular
+   expression library.
+   Copyright (C) 1985, 1989-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _REGEX_H
+#define _REGEX_H 1
+
+#include <sys/types.h>
+
+/* Allow the use in C++ code.  */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Define __USE_GNU to declare GNU extensions that violate the
+   POSIX name space rules.  */
+#ifdef _GNU_SOURCE
+# define __USE_GNU 1
+#endif
+
+#ifdef _REGEX_LARGE_OFFSETS
+
+/* Use types and values that are wide enough to represent signed and
+   unsigned byte offsets in memory.  This currently works only when
+   the regex code is used outside of the GNU C library; it is not yet
+   supported within glibc itself, and glibc users should not define
+   _REGEX_LARGE_OFFSETS.  */
+
+/* The type of object sizes.  */
+typedef size_t __re_size_t;
+
+/* The type of object sizes, in places where the traditional code
+   uses unsigned long int.  */
+typedef size_t __re_long_size_t;
+
+#else
+
+/* The traditional GNU regex implementation mishandles strings longer
+   than INT_MAX.  */
+typedef unsigned int __re_size_t;
+typedef unsigned long int __re_long_size_t;
+
+#endif
+
+/* The following two types have to be signed and unsigned integer type
+   wide enough to hold a value of a pointer.  For most ANSI compilers
+   ptrdiff_t and size_t should be likely OK.  Still size of these two
+   types is 2 for Microsoft C.  Ugh... */
+typedef long int s_reg_t;
+typedef unsigned long int active_reg_t;
+
+/* The following bits are used to determine the regexp syntax we
+   recognize.  The set/not-set meanings are chosen so that Emacs syntax
+   remains the value 0.  The bits are given in alphabetical order, and
+   the definitions shifted by one from the previous bit; thus, when we
+   add or remove a bit, only one other definition need change.  */
+typedef unsigned long int reg_syntax_t;
+
+#ifdef __USE_GNU
+/* If this bit is not set, then \ inside a bracket expression is literal.
+   If set, then such a \ quotes the following character.  */
+# define RE_BACKSLASH_ESCAPE_IN_LISTS ((unsigned long int) 1)
+
+/* If this bit is not set, then + and ? are operators, and \+ and \? are
+     literals.
+   If set, then \+ and \? are operators and + and ? are literals.  */
+# define RE_BK_PLUS_QM (RE_BACKSLASH_ESCAPE_IN_LISTS << 1)
+
+/* If this bit is set, then character classes are supported.  They are:
+     [:alpha:], [:upper:], [:lower:],  [:digit:], [:alnum:], [:xdigit:],
+     [:space:], [:print:], [:punct:], [:graph:], and [:cntrl:].
+   If not set, then character classes are not supported.  */
+# define RE_CHAR_CLASSES (RE_BK_PLUS_QM << 1)
+
+/* If this bit is set, then ^ and $ are always anchors (outside bracket
+     expressions, of course).
+   If this bit is not set, then it depends:
+	^  is an anchor if it is at the beginning of a regular
+	   expression or after an open-group or an alternation operator;
+	$  is an anchor if it is at the end of a regular expression, or
+	   before a close-group or an alternation operator.
+
+   This bit could be (re)combined with RE_CONTEXT_INDEP_OPS, because
+   POSIX draft 11.2 says that * etc. in leading positions is undefined.
+   We already implemented a previous draft which made those constructs
+   invalid, though, so we haven't changed the code back.  */
+# define RE_CONTEXT_INDEP_ANCHORS (RE_CHAR_CLASSES << 1)
+
+/* If this bit is set, then special characters are always special
+     regardless of where they are in the pattern.
+   If this bit is not set, then special characters are special only in
+     some contexts; otherwise they are ordinary.  Specifically,
+     * + ? and intervals are only special when not after the beginning,
+     open-group, or alternation operator.  */
+# define RE_CONTEXT_INDEP_OPS (RE_CONTEXT_INDEP_ANCHORS << 1)
+
+/* If this bit is set, then *, +, ?, and { cannot be first in an re or
+     immediately after an alternation or begin-group operator.  */
+# define RE_CONTEXT_INVALID_OPS (RE_CONTEXT_INDEP_OPS << 1)
+
+/* If this bit is set, then . matches newline.
+   If not set, then it doesn't.  */
+# define RE_DOT_NEWLINE (RE_CONTEXT_INVALID_OPS << 1)
+
+/* If this bit is set, then . doesn't match NUL.
+   If not set, then it does.  */
+# define RE_DOT_NOT_NULL (RE_DOT_NEWLINE << 1)
+
+/* If this bit is set, nonmatching lists [^...] do not match newline.
+   If not set, they do.  */
+# define RE_HAT_LISTS_NOT_NEWLINE (RE_DOT_NOT_NULL << 1)
+
+/* If this bit is set, either \{...\} or {...} defines an
+     interval, depending on RE_NO_BK_BRACES.
+   If not set, \{, \}, {, and } are literals.  */
+# define RE_INTERVALS (RE_HAT_LISTS_NOT_NEWLINE << 1)
+
+/* If this bit is set, +, ? and | aren't recognized as operators.
+   If not set, they are.  */
+# define RE_LIMITED_OPS (RE_INTERVALS << 1)
+
+/* If this bit is set, newline is an alternation operator.
+   If not set, newline is literal.  */
+# define RE_NEWLINE_ALT (RE_LIMITED_OPS << 1)
+
+/* If this bit is set, then '{...}' defines an interval, and \{ and \}
+     are literals.
+  If not set, then '\{...\}' defines an interval.  */
+# define RE_NO_BK_BRACES (RE_NEWLINE_ALT << 1)
+
+/* If this bit is set, (...) defines a group, and \( and \) are literals.
+   If not set, \(...\) defines a group, and ( and ) are literals.  */
+# define RE_NO_BK_PARENS (RE_NO_BK_BRACES << 1)
+
+/* If this bit is set, then \<digit> matches <digit>.
+   If not set, then \<digit> is a back-reference.  */
+# define RE_NO_BK_REFS (RE_NO_BK_PARENS << 1)
+
+/* If this bit is set, then | is an alternation operator, and \| is literal.
+   If not set, then \| is an alternation operator, and | is literal.  */
+# define RE_NO_BK_VBAR (RE_NO_BK_REFS << 1)
+
+/* If this bit is set, then an ending range point collating higher
+     than the starting range point, as in [z-a], is invalid.
+   If not set, then when ending range point collates higher than the
+     starting range point, the range is ignored.  */
+# define RE_NO_EMPTY_RANGES (RE_NO_BK_VBAR << 1)
+
+/* If this bit is set, then an unmatched ) is ordinary.
+   If not set, then an unmatched ) is invalid.  */
+# define RE_UNMATCHED_RIGHT_PAREN_ORD (RE_NO_EMPTY_RANGES << 1)
+
+/* If this bit is set, succeed as soon as we match the whole pattern,
+   without further backtracking.  */
+# define RE_NO_POSIX_BACKTRACKING (RE_UNMATCHED_RIGHT_PAREN_ORD << 1)
+
+/* If this bit is set, do not process the GNU regex operators.
+   If not set, then the GNU regex operators are recognized. */
+# define RE_NO_GNU_OPS (RE_NO_POSIX_BACKTRACKING << 1)
+
+/* If this bit is set, turn on internal regex debugging.
+   If not set, and debugging was on, turn it off.
+   This only works if regex.c is compiled -DDEBUG.
+   We define this bit always, so that all that's needed to turn on
+   debugging is to recompile regex.c; the calling code can always have
+   this bit set, and it won't affect anything in the normal case. */
+# define RE_DEBUG (RE_NO_GNU_OPS << 1)
+
+/* If this bit is set, a syntactically invalid interval is treated as
+   a string of ordinary characters.  For example, the ERE 'a{1' is
+   treated as 'a\{1'.  */
+# define RE_INVALID_INTERVAL_ORD (RE_DEBUG << 1)
+
+/* If this bit is set, then ignore case when matching.
+   If not set, then case is significant.  */
+# define RE_ICASE (RE_INVALID_INTERVAL_ORD << 1)
+
+/* This bit is used internally like RE_CONTEXT_INDEP_ANCHORS but only
+   for ^, because it is difficult to scan the regex backwards to find
+   whether ^ should be special.  */
+# define RE_CARET_ANCHORS_HERE (RE_ICASE << 1)
+
+/* If this bit is set, then \{ cannot be first in a regex or
+   immediately after an alternation, open-group or \} operator.  */
+# define RE_CONTEXT_INVALID_DUP (RE_CARET_ANCHORS_HERE << 1)
+
+/* If this bit is set, then no_sub will be set to 1 during
+   re_compile_pattern.  */
+# define RE_NO_SUB (RE_CONTEXT_INVALID_DUP << 1)
+#endif
+
+/* This global variable defines the particular regexp syntax to use (for
+   some interfaces).  When a regexp is compiled, the syntax used is
+   stored in the pattern buffer, so changing this does not affect
+   already-compiled regexps.  */
+extern reg_syntax_t re_syntax_options;
+
+#ifdef __USE_GNU
+/* Define combinations of the above bits for the standard possibilities.
+   (The [[[ comments delimit what gets put into the Texinfo file, so
+   don't delete them!)  */
+/* [[[begin syntaxes]]] */
+# define RE_SYNTAX_EMACS 0
+
+# define RE_SYNTAX_AWK							\
+  (RE_BACKSLASH_ESCAPE_IN_LISTS   | RE_DOT_NOT_NULL			\
+   | RE_NO_BK_PARENS              | RE_NO_BK_REFS			\
+   | RE_NO_BK_VBAR                | RE_NO_EMPTY_RANGES			\
+   | RE_DOT_NEWLINE		  | RE_CONTEXT_INDEP_ANCHORS		\
+   | RE_CHAR_CLASSES							\
+   | RE_UNMATCHED_RIGHT_PAREN_ORD | RE_NO_GNU_OPS)
+
+# define RE_SYNTAX_GNU_AWK						\
+  ((RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS		\
+    | RE_INVALID_INTERVAL_ORD)						\
+   & ~(RE_DOT_NOT_NULL | RE_CONTEXT_INDEP_OPS				\
+      | RE_CONTEXT_INVALID_OPS ))
+
+# define RE_SYNTAX_POSIX_AWK						\
+  (RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS		\
+   | RE_INTERVALS	    | RE_NO_GNU_OPS				\
+   | RE_INVALID_INTERVAL_ORD)
+
+# define RE_SYNTAX_GREP							\
+  ((RE_SYNTAX_POSIX_BASIC | RE_NEWLINE_ALT)				\
+   & ~(RE_CONTEXT_INVALID_DUP | RE_DOT_NOT_NULL))
+
+# define RE_SYNTAX_EGREP						\
+  ((RE_SYNTAX_POSIX_EXTENDED | RE_INVALID_INTERVAL_ORD | RE_NEWLINE_ALT) \
+   & ~(RE_CONTEXT_INVALID_OPS | RE_DOT_NOT_NULL))
+
+/* POSIX grep -E behavior is no longer incompatible with GNU.  */
+# define RE_SYNTAX_POSIX_EGREP						\
+  RE_SYNTAX_EGREP
+
+/* P1003.2/D11.2, section 4.20.7.1, lines 5078ff.  */
+# define RE_SYNTAX_ED RE_SYNTAX_POSIX_BASIC
+
+# define RE_SYNTAX_SED RE_SYNTAX_POSIX_BASIC
+
+/* Syntax bits common to both basic and extended POSIX regex syntax.  */
+# define _RE_SYNTAX_POSIX_COMMON					\
+  (RE_CHAR_CLASSES | RE_DOT_NEWLINE      | RE_DOT_NOT_NULL		\
+   | RE_INTERVALS  | RE_NO_EMPTY_RANGES)
+
+# define RE_SYNTAX_POSIX_BASIC						\
+  (_RE_SYNTAX_POSIX_COMMON | RE_BK_PLUS_QM | RE_CONTEXT_INVALID_DUP)
+
+/* Differs from ..._POSIX_BASIC only in that RE_BK_PLUS_QM becomes
+   RE_LIMITED_OPS, i.e., \? \+ \| are not recognized.  Actually, this
+   isn't minimal, since other operators, such as \`, aren't disabled.  */
+# define RE_SYNTAX_POSIX_MINIMAL_BASIC					\
+  (_RE_SYNTAX_POSIX_COMMON | RE_LIMITED_OPS)
+
+# define RE_SYNTAX_POSIX_EXTENDED					\
+  (_RE_SYNTAX_POSIX_COMMON  | RE_CONTEXT_INDEP_ANCHORS			\
+   | RE_CONTEXT_INDEP_OPS   | RE_NO_BK_BRACES				\
+   | RE_NO_BK_PARENS        | RE_NO_BK_VBAR				\
+   | RE_CONTEXT_INVALID_OPS | RE_UNMATCHED_RIGHT_PAREN_ORD)
+
+/* Differs from ..._POSIX_EXTENDED in that RE_CONTEXT_INDEP_OPS is
+   removed and RE_NO_BK_REFS is added.  */
+# define RE_SYNTAX_POSIX_MINIMAL_EXTENDED				\
+  (_RE_SYNTAX_POSIX_COMMON  | RE_CONTEXT_INDEP_ANCHORS			\
+   | RE_CONTEXT_INVALID_OPS | RE_NO_BK_BRACES				\
+   | RE_NO_BK_PARENS        | RE_NO_BK_REFS				\
+   | RE_NO_BK_VBAR	    | RE_UNMATCHED_RIGHT_PAREN_ORD)
+/* [[[end syntaxes]]] */
+
+/* Maximum number of duplicates an interval can allow.  POSIX-conforming
+   systems might define this in <limits.h>, but we want our
+   value, so remove any previous define.  */
+# ifdef _REGEX_INCLUDE_LIMITS_H
+#  include <limits.h>
+# endif
+# ifdef RE_DUP_MAX
+#  undef RE_DUP_MAX
+# endif
+
+/* RE_DUP_MAX is 2**15 - 1 because an earlier implementation stored
+   the counter as a 2-byte signed integer.  This is no longer true, so
+   RE_DUP_MAX could be increased to (INT_MAX / 10 - 1), or to
+   ((SIZE_MAX - 9) / 10) if _REGEX_LARGE_OFFSETS is defined.
+   However, there would be a huge performance problem if someone
+   actually used a pattern like a\{214748363\}, so RE_DUP_MAX retains
+   its historical value.  */
+# define RE_DUP_MAX (0x7fff)
+#endif
+
+
+/* POSIX 'cflags' bits (i.e., information for 'regcomp').  */
+
+/* If this bit is set, then use extended regular expression syntax.
+   If not set, then use basic regular expression syntax.  */
+#define REG_EXTENDED 1
+
+/* If this bit is set, then ignore case when matching.
+   If not set, then case is significant.  */
+#define REG_ICASE (1 << 1)
+
+/* If this bit is set, then anchors do not match at newline
+     characters in the string.
+   If not set, then anchors do match at newlines.  */
+#define REG_NEWLINE (1 << 2)
+
+/* If this bit is set, then report only success or fail in regexec.
+   If not set, then returns differ between not matching and errors.  */
+#define REG_NOSUB (1 << 3)
+
+
+/* POSIX 'eflags' bits (i.e., information for regexec).  */
+
+/* If this bit is set, then the beginning-of-line operator doesn't match
+     the beginning of the string (presumably because it's not the
+     beginning of a line).
+   If not set, then the beginning-of-line operator does match the
+     beginning of the string.  */
+#define REG_NOTBOL 1
+
+/* Like REG_NOTBOL, except for the end-of-line.  */
+#define REG_NOTEOL (1 << 1)
+
+/* Use PMATCH[0] to delimit the start and end of the search in the
+   buffer.  */
+#define REG_STARTEND (1 << 2)
+
+
+/* If any error codes are removed, changed, or added, update the
+   '__re_error_msgid' table in regcomp.c.  */
+
+typedef enum
+{
+  _REG_ENOSYS = -1,	/* This will never happen for this implementation.  */
+  _REG_NOERROR = 0,	/* Success.  */
+  _REG_NOMATCH,		/* Didn't find a match (for regexec).  */
+
+  /* POSIX regcomp return error codes.  (In the order listed in the
+     standard.)  */
+  _REG_BADPAT,		/* Invalid pattern.  */
+  _REG_ECOLLATE,	/* Invalid collating element.  */
+  _REG_ECTYPE,		/* Invalid character class name.  */
+  _REG_EESCAPE,		/* Trailing backslash.  */
+  _REG_ESUBREG,		/* Invalid back reference.  */
+  _REG_EBRACK,		/* Unmatched left bracket.  */
+  _REG_EPAREN,		/* Parenthesis imbalance.  */
+  _REG_EBRACE,		/* Unmatched \{.  */
+  _REG_BADBR,		/* Invalid contents of \{\}.  */
+  _REG_ERANGE,		/* Invalid range end.  */
+  _REG_ESPACE,		/* Ran out of memory.  */
+  _REG_BADRPT,		/* No preceding re for repetition op.  */
+
+  /* Error codes we've added.  */
+  _REG_EEND,		/* Premature end.  */
+  _REG_ESIZE,		/* Too large (e.g., repeat count too large).  */
+  _REG_ERPAREN		/* Unmatched ) or \); not returned from regcomp.  */
+} reg_errcode_t;
+
+#if defined _XOPEN_SOURCE || defined __USE_XOPEN2K
+# define REG_ENOSYS	_REG_ENOSYS
+#endif
+#define REG_NOERROR	_REG_NOERROR
+#define REG_NOMATCH	_REG_NOMATCH
+#define REG_BADPAT	_REG_BADPAT
+#define REG_ECOLLATE	_REG_ECOLLATE
+#define REG_ECTYPE	_REG_ECTYPE
+#define REG_EESCAPE	_REG_EESCAPE
+#define REG_ESUBREG	_REG_ESUBREG
+#define REG_EBRACK	_REG_EBRACK
+#define REG_EPAREN	_REG_EPAREN
+#define REG_EBRACE	_REG_EBRACE
+#define REG_BADBR	_REG_BADBR
+#define REG_ERANGE	_REG_ERANGE
+#define REG_ESPACE	_REG_ESPACE
+#define REG_BADRPT	_REG_BADRPT
+#define REG_EEND	_REG_EEND
+#define REG_ESIZE	_REG_ESIZE
+#define REG_ERPAREN	_REG_ERPAREN
+
+/* This data structure represents a compiled pattern.  Before calling
+   the pattern compiler, the fields 'buffer', 'allocated', 'fastmap',
+   and 'translate' can be set.  After the pattern has been compiled,
+   the fields 're_nsub', 'not_bol' and 'not_eol' are available.  All
+   other fields are private to the regex routines.  */
+
+#ifndef RE_TRANSLATE_TYPE
+# define __RE_TRANSLATE_TYPE unsigned char *
+# ifdef __USE_GNU
+#  define RE_TRANSLATE_TYPE __RE_TRANSLATE_TYPE
+# endif
+#endif
+
+#ifdef __USE_GNU
+# define __REPB_PREFIX(name) name
+#else
+# define __REPB_PREFIX(name) __##name
+#endif
+
+struct re_pattern_buffer
+{
+  /* Space that holds the compiled pattern.  The type
+     'struct re_dfa_t' is private and is not declared here.  */
+  struct re_dfa_t *__REPB_PREFIX(buffer);
+
+  /* Number of bytes to which 'buffer' points.  */
+  __re_long_size_t __REPB_PREFIX(allocated);
+
+  /* Number of bytes actually used in 'buffer'.  */
+  __re_long_size_t __REPB_PREFIX(used);
+
+  /* Syntax setting with which the pattern was compiled.  */
+  reg_syntax_t __REPB_PREFIX(syntax);
+
+  /* Pointer to a fastmap, if any, otherwise zero.  re_search uses the
+     fastmap, if there is one, to skip over impossible starting points
+     for matches.  */
+  char *__REPB_PREFIX(fastmap);
+
+  /* Either a translate table to apply to all characters before
+     comparing them, or zero for no translation.  The translation is
+     applied to a pattern when it is compiled and to a string when it
+     is matched.  */
+  __RE_TRANSLATE_TYPE __REPB_PREFIX(translate);
+
+  /* Number of subexpressions found by the compiler.  */
+  size_t re_nsub;
+
+  /* Zero if this pattern cannot match the empty string, one else.
+     Well, in truth it's used only in 're_search_2', to see whether or
+     not we should use the fastmap, so we don't set this absolutely
+     perfectly; see 're_compile_fastmap' (the "duplicate" case).  */
+  unsigned __REPB_PREFIX(can_be_null) : 1;
+
+  /* If REGS_UNALLOCATED, allocate space in the 'regs' structure
+     for 'max (RE_NREGS, re_nsub + 1)' groups.
+     If REGS_REALLOCATE, reallocate space if necessary.
+     If REGS_FIXED, use what's there.  */
+#ifdef __USE_GNU
+# define REGS_UNALLOCATED 0
+# define REGS_REALLOCATE 1
+# define REGS_FIXED 2
+#endif
+  unsigned __REPB_PREFIX(regs_allocated) : 2;
+
+  /* Set to zero when 're_compile_pattern' compiles a pattern; set to
+     one by 're_compile_fastmap' if it updates the fastmap.  */
+  unsigned __REPB_PREFIX(fastmap_accurate) : 1;
+
+  /* If set, 're_match_2' does not return information about
+     subexpressions.  */
+  unsigned __REPB_PREFIX(no_sub) : 1;
+
+  /* If set, a beginning-of-line anchor doesn't match at the beginning
+     of the string.  */
+  unsigned __REPB_PREFIX(not_bol) : 1;
+
+  /* Similarly for an end-of-line anchor.  */
+  unsigned __REPB_PREFIX(not_eol) : 1;
+
+  /* If true, an anchor at a newline matches.  */
+  unsigned __REPB_PREFIX(newline_anchor) : 1;
+};
+
+typedef struct re_pattern_buffer regex_t;
+
+/* Type for byte offsets within the string.  POSIX mandates this.  */
+#ifdef _REGEX_LARGE_OFFSETS
+/* POSIX 1003.1-2008 requires that regoff_t be at least as wide as
+   ptrdiff_t and ssize_t.  We don't know of any hosts where ptrdiff_t
+   is wider than ssize_t, so ssize_t is safe.  ptrdiff_t is not
+   visible here, so use ssize_t.  */
+typedef ssize_t regoff_t;
+#else
+/* The traditional GNU regex implementation mishandles strings longer
+   than INT_MAX.  */
+typedef int regoff_t;
+#endif
+
+
+#ifdef __USE_GNU
+/* This is the structure we store register match data in.  See
+   regex.texinfo for a full description of what registers match.  */
+struct re_registers
+{
+  __re_size_t num_regs;
+  regoff_t *start;
+  regoff_t *end;
+};
+
+
+/* If 'regs_allocated' is REGS_UNALLOCATED in the pattern buffer,
+   're_match_2' returns information about at least this many registers
+   the first time a 'regs' structure is passed.  */
+# ifndef RE_NREGS
+#  define RE_NREGS 30
+# endif
+#endif
+
+
+/* POSIX specification for registers.  Aside from the different names than
+   're_registers', POSIX uses an array of structures, instead of a
+   structure of arrays.  */
+typedef struct
+{
+  regoff_t rm_so;  /* Byte offset from string's start to substring's start.  */
+  regoff_t rm_eo;  /* Byte offset from string's start to substring's end.  */
+} regmatch_t;
+
+/* Declarations for routines.  */
+
+#ifdef __USE_GNU
+/* Sets the current default syntax to SYNTAX, and return the old syntax.
+   You can also simply assign to the 're_syntax_options' variable.  */
+extern reg_syntax_t re_set_syntax (reg_syntax_t __syntax);
+
+/* Compile the regular expression PATTERN, with length LENGTH
+   and syntax given by the global 're_syntax_options', into the buffer
+   BUFFER.  Return NULL if successful, and an error string if not.
+
+   To free the allocated storage, you must call 'regfree' on BUFFER.
+   Note that the translate table must either have been initialized by
+   'regcomp', with a malloc'ed value, or set to NULL before calling
+   'regfree'.  */
+extern const char *re_compile_pattern (const char *__pattern, size_t __length,
+				       struct re_pattern_buffer *__buffer);
+
+
+/* Compile a fastmap for the compiled pattern in BUFFER; used to
+   accelerate searches.  Return 0 if successful and -2 if was an
+   internal error.  */
+extern int re_compile_fastmap (struct re_pattern_buffer *__buffer);
+
+
+/* Search in the string STRING (with length LENGTH) for the pattern
+   compiled into BUFFER.  Start searching at position START, for RANGE
+   characters.  Return the starting position of the match, -1 for no
+   match, or -2 for an internal error.  Also return register
+   information in REGS (if REGS and BUFFER->no_sub are nonzero).  */
+extern regoff_t re_search (struct re_pattern_buffer *__buffer,
+			   const char *__String, regoff_t __length,
+			   regoff_t __start, regoff_t __range,
+			   struct re_registers *__regs);
+
+
+/* Like 're_search', but search in the concatenation of STRING1 and
+   STRING2.  Also, stop searching at index START + STOP.  */
+extern regoff_t re_search_2 (struct re_pattern_buffer *__buffer,
+			     const char *__string1, regoff_t __length1,
+			     const char *__string2, regoff_t __length2,
+			     regoff_t __start, regoff_t __range,
+			     struct re_registers *__regs,
+			     regoff_t __stop);
+
+
+/* Like 're_search', but return how many characters in STRING the regexp
+   in BUFFER matched, starting at position START.  */
+extern regoff_t re_match (struct re_pattern_buffer *__buffer,
+			  const char *__String, regoff_t __length,
+			  regoff_t __start, struct re_registers *__regs);
+
+
+/* Relates to 're_match' as 're_search_2' relates to 're_search'.  */
+extern regoff_t re_match_2 (struct re_pattern_buffer *__buffer,
+			    const char *__string1, regoff_t __length1,
+			    const char *__string2, regoff_t __length2,
+			    regoff_t __start, struct re_registers *__regs,
+			    regoff_t __stop);
+
+
+/* Set REGS to hold NUM_REGS registers, storing them in STARTS and
+   ENDS.  Subsequent matches using BUFFER and REGS will use this memory
+   for recording register information.  STARTS and ENDS must be
+   allocated with malloc, and must each be at least 'NUM_REGS * sizeof
+   (regoff_t)' bytes long.
+
+   If NUM_REGS == 0, then subsequent matches should allocate their own
+   register data.
+
+   Unless this function is called, the first search or match using
+   BUFFER will allocate its own register data, without
+   freeing the old data.  */
+extern void re_set_registers (struct re_pattern_buffer *__buffer,
+			      struct re_registers *__regs,
+			      __re_size_t __num_regs,
+			      regoff_t *__starts, regoff_t *__ends);
+#endif	/* Use GNU */
+
+#if defined _REGEX_RE_COMP || (defined _LIBC && defined __USE_MISC)
+/* 4.2 bsd compatibility.  */
+extern char *re_comp (const char *);
+extern int re_exec (const char *);
+#endif
+
+/* For plain 'restrict', use glibc's __restrict if defined.
+   Otherwise, GCC 2.95 and later have "__restrict"; C99 compilers have
+   "restrict", and "configure" may have defined "restrict".
+   Other compilers use __restrict, __restrict__, and _Restrict, and
+   'configure' might #define 'restrict' to those words, so pick a
+   different name.  */
+#ifndef _Restrict_
+# if defined __restrict \
+     || 2 < __GNUC__ + (95 <= __GNUC_MINOR__) \
+     || __clang_major__ >= 3
+#  define _Restrict_ __restrict
+# elif 199901L <= __STDC_VERSION__ || defined restrict
+#  define _Restrict_ restrict
+# else
+#  define _Restrict_
+# endif
+#endif
+/* For the ISO C99 syntax
+     array_name[restrict]
+   use glibc's __restrict_arr if available.
+   Otherwise, GCC 3.1 and clang support this syntax (but not in C++ mode).
+   Other ISO C99 compilers support it as well.  */
+#ifndef _Restrict_arr_
+# ifdef __restrict_arr
+#  define _Restrict_arr_ __restrict_arr
+# elif ((199901L <= __STDC_VERSION__ \
+         || 3 < __GNUC__ + (1 <= __GNUC_MINOR__) \
+         || __clang_major__ >= 3) \
+        && !defined __cplusplus)
+#  define _Restrict_arr_ _Restrict_
+# else
+#  define _Restrict_arr_
+# endif
+#endif
+
+/* POSIX compatibility.  */
+extern int regcomp (regex_t *_Restrict_ __preg,
+		    const char *_Restrict_ __pattern,
+		    int __cflags);
+
+extern int regexec (const regex_t *_Restrict_ __preg,
+		    const char *_Restrict_ __String, size_t __nmatch,
+		    regmatch_t __pmatch[_Restrict_arr_],
+		    int __eflags);
+
+extern size_t regerror (int __errcode, const regex_t *_Restrict_ __preg,
+			char *_Restrict_ __errbuf, size_t __errbuf_size);
+
+extern void regfree (regex_t *__preg);
+
+
+#ifdef __cplusplus
+}
+#endif	/* C++ */
+
+#endif /* regex.h */
diff --git a/src/grep/lib/regex_internal.c b/src/grep/lib/regex_internal.c
new file mode 100644
index 0000000..aefcfa2
--- /dev/null
+++ b/src/grep/lib/regex_internal.c
@@ -0,0 +1,1753 @@
+/* Extended regular expression matching and search library.
+   Copyright (C) 2002-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+static void re_string_construct_common (const char *str, Idx len,
+					re_string_t *pstr,
+					RE_TRANSLATE_TYPE trans, bool icase,
+					const re_dfa_t *dfa);
+static re_dfastate_t *create_ci_newstate (const re_dfa_t *dfa,
+					  const re_node_set *nodes,
+					  re_hashval_t hash);
+static re_dfastate_t *create_cd_newstate (const re_dfa_t *dfa,
+					  const re_node_set *nodes,
+					  unsigned int context,
+					  re_hashval_t hash);
+static reg_errcode_t re_string_realloc_buffers (re_string_t *pstr,
+						Idx new_buf_len);
+#ifdef RE_ENABLE_I18N
+static void build_wcs_buffer (re_string_t *pstr);
+static reg_errcode_t build_wcs_upper_buffer (re_string_t *pstr);
+#endif /* RE_ENABLE_I18N */
+static void build_upper_buffer (re_string_t *pstr);
+static void re_string_translate_buffer (re_string_t *pstr);
+static unsigned int re_string_context_at (const re_string_t *input, Idx idx,
+					  int eflags) __attribute__ ((pure));
+
+/* Functions for string operation.  */
+
+/* This function allocate the buffers.  It is necessary to call
+   re_string_reconstruct before using the object.  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+re_string_allocate (re_string_t *pstr, const char *str, Idx len, Idx init_len,
+		    RE_TRANSLATE_TYPE trans, bool icase, const re_dfa_t *dfa)
+{
+  reg_errcode_t ret;
+  Idx init_buf_len;
+
+  /* Ensure at least one character fits into the buffers.  */
+  if (init_len < dfa->mb_cur_max)
+    init_len = dfa->mb_cur_max;
+  init_buf_len = (len + 1 < init_len) ? len + 1: init_len;
+  re_string_construct_common (str, len, pstr, trans, icase, dfa);
+
+  ret = re_string_realloc_buffers (pstr, init_buf_len);
+  if (__glibc_unlikely (ret != REG_NOERROR))
+    return ret;
+
+  pstr->word_char = dfa->word_char;
+  pstr->word_ops_used = dfa->word_ops_used;
+  pstr->mbs = pstr->mbs_allocated ? pstr->mbs : (unsigned char *) str;
+  pstr->valid_len = (pstr->mbs_allocated || dfa->mb_cur_max > 1) ? 0 : len;
+  pstr->valid_raw_len = pstr->valid_len;
+  return REG_NOERROR;
+}
+
+/* This function allocate the buffers, and initialize them.  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+re_string_construct (re_string_t *pstr, const char *str, Idx len,
+		     RE_TRANSLATE_TYPE trans, bool icase, const re_dfa_t *dfa)
+{
+  reg_errcode_t ret;
+  memset (pstr, '\0', sizeof (re_string_t));
+  re_string_construct_common (str, len, pstr, trans, icase, dfa);
+
+  if (len > 0)
+    {
+      ret = re_string_realloc_buffers (pstr, len + 1);
+      if (__glibc_unlikely (ret != REG_NOERROR))
+	return ret;
+    }
+  pstr->mbs = pstr->mbs_allocated ? pstr->mbs : (unsigned char *) str;
+
+  if (icase)
+    {
+#ifdef RE_ENABLE_I18N
+      if (dfa->mb_cur_max > 1)
+	{
+	  while (1)
+	    {
+	      ret = build_wcs_upper_buffer (pstr);
+	      if (__glibc_unlikely (ret != REG_NOERROR))
+		return ret;
+	      if (pstr->valid_raw_len >= len)
+		break;
+	      if (pstr->bufs_len > pstr->valid_len + dfa->mb_cur_max)
+		break;
+	      ret = re_string_realloc_buffers (pstr, pstr->bufs_len * 2);
+	      if (__glibc_unlikely (ret != REG_NOERROR))
+		return ret;
+	    }
+	}
+      else
+#endif /* RE_ENABLE_I18N  */
+	build_upper_buffer (pstr);
+    }
+  else
+    {
+#ifdef RE_ENABLE_I18N
+      if (dfa->mb_cur_max > 1)
+	build_wcs_buffer (pstr);
+      else
+#endif /* RE_ENABLE_I18N  */
+	{
+	  if (trans != NULL)
+	    re_string_translate_buffer (pstr);
+	  else
+	    {
+	      pstr->valid_len = pstr->bufs_len;
+	      pstr->valid_raw_len = pstr->bufs_len;
+	    }
+	}
+    }
+
+  return REG_NOERROR;
+}
+
+/* Helper functions for re_string_allocate, and re_string_construct.  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+re_string_realloc_buffers (re_string_t *pstr, Idx new_buf_len)
+{
+#ifdef RE_ENABLE_I18N
+  if (pstr->mb_cur_max > 1)
+    {
+      wint_t *new_wcs;
+
+      /* Avoid overflow in realloc.  */
+      const size_t max_object_size = MAX (sizeof (wint_t), sizeof (Idx));
+      if (__glibc_unlikely (MIN (IDX_MAX, SIZE_MAX / max_object_size)
+			    < new_buf_len))
+	return REG_ESPACE;
+
+      new_wcs = re_realloc (pstr->wcs, wint_t, new_buf_len);
+      if (__glibc_unlikely (new_wcs == NULL))
+	return REG_ESPACE;
+      pstr->wcs = new_wcs;
+      if (pstr->offsets != NULL)
+	{
+	  Idx *new_offsets = re_realloc (pstr->offsets, Idx, new_buf_len);
+	  if (__glibc_unlikely (new_offsets == NULL))
+	    return REG_ESPACE;
+	  pstr->offsets = new_offsets;
+	}
+    }
+#endif /* RE_ENABLE_I18N  */
+  if (pstr->mbs_allocated)
+    {
+      unsigned char *new_mbs = re_realloc (pstr->mbs, unsigned char,
+					   new_buf_len);
+      if (__glibc_unlikely (new_mbs == NULL))
+	return REG_ESPACE;
+      pstr->mbs = new_mbs;
+    }
+  pstr->bufs_len = new_buf_len;
+  return REG_NOERROR;
+}
+
+
+static void
+re_string_construct_common (const char *str, Idx len, re_string_t *pstr,
+			    RE_TRANSLATE_TYPE trans, bool icase,
+			    const re_dfa_t *dfa)
+{
+  pstr->raw_mbs = (const unsigned char *) str;
+  pstr->len = len;
+  pstr->raw_len = len;
+  pstr->trans = trans;
+  pstr->icase = icase;
+  pstr->mbs_allocated = (trans != NULL || icase);
+  pstr->mb_cur_max = dfa->mb_cur_max;
+  pstr->is_utf8 = dfa->is_utf8;
+  pstr->map_notascii = dfa->map_notascii;
+  pstr->stop = pstr->len;
+  pstr->raw_stop = pstr->stop;
+}
+
+#ifdef RE_ENABLE_I18N
+
+/* Build wide character buffer PSTR->WCS.
+   If the byte sequence of the string are:
+     <mb1>(0), <mb1>(1), <mb2>(0), <mb2>(1), <sb3>
+   Then wide character buffer will be:
+     <wc1>   , WEOF    , <wc2>   , WEOF    , <wc3>
+   We use WEOF for padding, they indicate that the position isn't
+   a first byte of a multibyte character.
+
+   Note that this function assumes PSTR->VALID_LEN elements are already
+   built and starts from PSTR->VALID_LEN.  */
+
+static void
+build_wcs_buffer (re_string_t *pstr)
+{
+#ifdef _LIBC
+  unsigned char buf[MB_LEN_MAX];
+  DEBUG_ASSERT (MB_LEN_MAX >= pstr->mb_cur_max);
+#else
+  unsigned char buf[64];
+#endif
+  mbstate_t prev_st;
+  Idx byte_idx, end_idx, remain_len;
+  size_t mbclen;
+
+  /* Build the buffers from pstr->valid_len to either pstr->len or
+     pstr->bufs_len.  */
+  end_idx = (pstr->bufs_len > pstr->len) ? pstr->len : pstr->bufs_len;
+  for (byte_idx = pstr->valid_len; byte_idx < end_idx;)
+    {
+      wchar_t wc;
+      const char *p;
+
+      remain_len = end_idx - byte_idx;
+      prev_st = pstr->cur_state;
+      /* Apply the translation if we need.  */
+      if (__glibc_unlikely (pstr->trans != NULL))
+	{
+	  int i, ch;
+
+	  for (i = 0; i < pstr->mb_cur_max && i < remain_len; ++i)
+	    {
+	      ch = pstr->raw_mbs [pstr->raw_mbs_idx + byte_idx + i];
+	      buf[i] = pstr->mbs[byte_idx + i] = pstr->trans[ch];
+	    }
+	  p = (const char *) buf;
+	}
+      else
+	p = (const char *) pstr->raw_mbs + pstr->raw_mbs_idx + byte_idx;
+      mbclen = __mbrtowc (&wc, p, remain_len, &pstr->cur_state);
+      if (__glibc_unlikely (mbclen == (size_t) -1 || mbclen == 0
+			    || (mbclen == (size_t) -2
+				&& pstr->bufs_len >= pstr->len)))
+	{
+	  /* We treat these cases as a singlebyte character.  */
+	  mbclen = 1;
+	  wc = (wchar_t) pstr->raw_mbs[pstr->raw_mbs_idx + byte_idx];
+	  if (__glibc_unlikely (pstr->trans != NULL))
+	    wc = pstr->trans[wc];
+	  pstr->cur_state = prev_st;
+	}
+      else if (__glibc_unlikely (mbclen == (size_t) -2))
+	{
+	  /* The buffer doesn't have enough space, finish to build.  */
+	  pstr->cur_state = prev_st;
+	  break;
+	}
+
+      /* Write wide character and padding.  */
+      pstr->wcs[byte_idx++] = wc;
+      /* Write paddings.  */
+      for (remain_len = byte_idx + mbclen - 1; byte_idx < remain_len ;)
+	pstr->wcs[byte_idx++] = WEOF;
+    }
+  pstr->valid_len = byte_idx;
+  pstr->valid_raw_len = byte_idx;
+}
+
+/* Build wide character buffer PSTR->WCS like build_wcs_buffer,
+   but for REG_ICASE.  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+build_wcs_upper_buffer (re_string_t *pstr)
+{
+  mbstate_t prev_st;
+  Idx src_idx, byte_idx, end_idx, remain_len;
+  size_t mbclen;
+#ifdef _LIBC
+  char buf[MB_LEN_MAX];
+  DEBUG_ASSERT (pstr->mb_cur_max <= MB_LEN_MAX);
+#else
+  char buf[64];
+#endif
+
+  byte_idx = pstr->valid_len;
+  end_idx = (pstr->bufs_len > pstr->len) ? pstr->len : pstr->bufs_len;
+
+  /* The following optimization assumes that ASCII characters can be
+     mapped to wide characters with a simple cast.  */
+  if (! pstr->map_notascii && pstr->trans == NULL && !pstr->offsets_needed)
+    {
+      while (byte_idx < end_idx)
+	{
+	  wchar_t wc;
+	  unsigned char ch = pstr->raw_mbs[pstr->raw_mbs_idx + byte_idx];
+
+	  if (isascii (ch) && mbsinit (&pstr->cur_state))
+	    {
+	      /* The next step uses the assumption that wchar_t is encoded
+		 ASCII-safe: all ASCII values can be converted like this.  */
+	      wchar_t wcu = __towupper (ch);
+	      if (isascii (wcu))
+		{
+		  pstr->mbs[byte_idx] = wcu;
+		  pstr->wcs[byte_idx] = wcu;
+		  byte_idx++;
+		  continue;
+		}
+	    }
+
+	  remain_len = end_idx - byte_idx;
+	  prev_st = pstr->cur_state;
+	  mbclen = __mbrtowc (&wc,
+			      ((const char *) pstr->raw_mbs + pstr->raw_mbs_idx
+			       + byte_idx), remain_len, &pstr->cur_state);
+	  if (__glibc_likely (0 < mbclen && mbclen < (size_t) -2))
+	    {
+	      wchar_t wcu = __towupper (wc);
+	      if (wcu != wc)
+		{
+		  size_t mbcdlen;
+
+		  mbcdlen = __wcrtomb (buf, wcu, &prev_st);
+		  if (__glibc_likely (mbclen == mbcdlen))
+		    memcpy (pstr->mbs + byte_idx, buf, mbclen);
+		  else
+		    {
+		      src_idx = byte_idx;
+		      goto offsets_needed;
+		    }
+		}
+	      else
+		memcpy (pstr->mbs + byte_idx,
+			pstr->raw_mbs + pstr->raw_mbs_idx + byte_idx, mbclen);
+	      pstr->wcs[byte_idx++] = wcu;
+	      /* Write paddings.  */
+	      for (remain_len = byte_idx + mbclen - 1; byte_idx < remain_len ;)
+		pstr->wcs[byte_idx++] = WEOF;
+	    }
+	  else if (mbclen == (size_t) -1 || mbclen == 0
+		   || (mbclen == (size_t) -2 && pstr->bufs_len >= pstr->len))
+	    {
+	      /* It is an invalid character, an incomplete character
+		 at the end of the string, or '\0'.  Just use the byte.  */
+	      pstr->mbs[byte_idx] = ch;
+	      /* And also cast it to wide char.  */
+	      pstr->wcs[byte_idx++] = (wchar_t) ch;
+	      if (__glibc_unlikely (mbclen == (size_t) -1))
+		pstr->cur_state = prev_st;
+	    }
+	  else
+	    {
+	      /* The buffer doesn't have enough space, finish to build.  */
+	      pstr->cur_state = prev_st;
+	      break;
+	    }
+	}
+      pstr->valid_len = byte_idx;
+      pstr->valid_raw_len = byte_idx;
+      return REG_NOERROR;
+    }
+  else
+    for (src_idx = pstr->valid_raw_len; byte_idx < end_idx;)
+      {
+	wchar_t wc;
+	const char *p;
+      offsets_needed:
+	remain_len = end_idx - byte_idx;
+	prev_st = pstr->cur_state;
+	if (__glibc_unlikely (pstr->trans != NULL))
+	  {
+	    int i, ch;
+
+	    for (i = 0; i < pstr->mb_cur_max && i < remain_len; ++i)
+	      {
+		ch = pstr->raw_mbs [pstr->raw_mbs_idx + src_idx + i];
+		buf[i] = pstr->trans[ch];
+	      }
+	    p = (const char *) buf;
+	  }
+	else
+	  p = (const char *) pstr->raw_mbs + pstr->raw_mbs_idx + src_idx;
+	mbclen = __mbrtowc (&wc, p, remain_len, &pstr->cur_state);
+	if (__glibc_likely (0 < mbclen && mbclen < (size_t) -2))
+	  {
+	    wchar_t wcu = __towupper (wc);
+	    if (wcu != wc)
+	      {
+		size_t mbcdlen;
+
+		mbcdlen = __wcrtomb ((char *) buf, wcu, &prev_st);
+		if (__glibc_likely (mbclen == mbcdlen))
+		  memcpy (pstr->mbs + byte_idx, buf, mbclen);
+		else if (mbcdlen != (size_t) -1)
+		  {
+		    size_t i;
+
+		    if (byte_idx + mbcdlen > pstr->bufs_len)
+		      {
+			pstr->cur_state = prev_st;
+			break;
+		      }
+
+		    if (pstr->offsets == NULL)
+		      {
+			pstr->offsets = re_malloc (Idx, pstr->bufs_len);
+
+			if (pstr->offsets == NULL)
+			  return REG_ESPACE;
+		      }
+		    if (!pstr->offsets_needed)
+		      {
+			for (i = 0; i < (size_t) byte_idx; ++i)
+			  pstr->offsets[i] = i;
+			pstr->offsets_needed = 1;
+		      }
+
+		    memcpy (pstr->mbs + byte_idx, buf, mbcdlen);
+		    pstr->wcs[byte_idx] = wcu;
+		    pstr->offsets[byte_idx] = src_idx;
+		    for (i = 1; i < mbcdlen; ++i)
+		      {
+			pstr->offsets[byte_idx + i]
+			  = src_idx + (i < mbclen ? i : mbclen - 1);
+			pstr->wcs[byte_idx + i] = WEOF;
+		      }
+		    pstr->len += mbcdlen - mbclen;
+		    if (pstr->raw_stop > src_idx)
+		      pstr->stop += mbcdlen - mbclen;
+		    end_idx = (pstr->bufs_len > pstr->len)
+			      ? pstr->len : pstr->bufs_len;
+		    byte_idx += mbcdlen;
+		    src_idx += mbclen;
+		    continue;
+		  }
+		else
+		  memcpy (pstr->mbs + byte_idx, p, mbclen);
+	      }
+	    else
+	      memcpy (pstr->mbs + byte_idx, p, mbclen);
+
+	    if (__glibc_unlikely (pstr->offsets_needed != 0))
+	      {
+		size_t i;
+		for (i = 0; i < mbclen; ++i)
+		  pstr->offsets[byte_idx + i] = src_idx + i;
+	      }
+	    src_idx += mbclen;
+
+	    pstr->wcs[byte_idx++] = wcu;
+	    /* Write paddings.  */
+	    for (remain_len = byte_idx + mbclen - 1; byte_idx < remain_len ;)
+	      pstr->wcs[byte_idx++] = WEOF;
+	  }
+	else if (mbclen == (size_t) -1 || mbclen == 0
+		 || (mbclen == (size_t) -2 && pstr->bufs_len >= pstr->len))
+	  {
+	    /* It is an invalid character or '\0'.  Just use the byte.  */
+	    int ch = pstr->raw_mbs[pstr->raw_mbs_idx + src_idx];
+
+	    if (__glibc_unlikely (pstr->trans != NULL))
+	      ch = pstr->trans [ch];
+	    pstr->mbs[byte_idx] = ch;
+
+	    if (__glibc_unlikely (pstr->offsets_needed != 0))
+	      pstr->offsets[byte_idx] = src_idx;
+	    ++src_idx;
+
+	    /* And also cast it to wide char.  */
+	    pstr->wcs[byte_idx++] = (wchar_t) ch;
+	    if (__glibc_unlikely (mbclen == (size_t) -1))
+	      pstr->cur_state = prev_st;
+	  }
+	else
+	  {
+	    /* The buffer doesn't have enough space, finish to build.  */
+	    pstr->cur_state = prev_st;
+	    break;
+	  }
+      }
+  pstr->valid_len = byte_idx;
+  pstr->valid_raw_len = src_idx;
+  return REG_NOERROR;
+}
+
+/* Skip characters until the index becomes greater than NEW_RAW_IDX.
+   Return the index.  */
+
+static Idx
+re_string_skip_chars (re_string_t *pstr, Idx new_raw_idx, wint_t *last_wc)
+{
+  mbstate_t prev_st;
+  Idx rawbuf_idx;
+  size_t mbclen;
+  wint_t wc = WEOF;
+
+  /* Skip the characters which are not necessary to check.  */
+  for (rawbuf_idx = pstr->raw_mbs_idx + pstr->valid_raw_len;
+       rawbuf_idx < new_raw_idx;)
+    {
+      wchar_t wc2;
+      Idx remain_len = pstr->raw_len - rawbuf_idx;
+      prev_st = pstr->cur_state;
+      mbclen = __mbrtowc (&wc2, (const char *) pstr->raw_mbs + rawbuf_idx,
+			  remain_len, &pstr->cur_state);
+      if (__glibc_unlikely (mbclen == (size_t) -2 || mbclen == (size_t) -1
+			    || mbclen == 0))
+	{
+	  /* We treat these cases as a single byte character.  */
+	  if (mbclen == 0 || remain_len == 0)
+	    wc = L'\0';
+	  else
+	    wc = *(unsigned char *) (pstr->raw_mbs + rawbuf_idx);
+	  mbclen = 1;
+	  pstr->cur_state = prev_st;
+	}
+      else
+	wc = wc2;
+      /* Then proceed the next character.  */
+      rawbuf_idx += mbclen;
+    }
+  *last_wc = wc;
+  return rawbuf_idx;
+}
+#endif /* RE_ENABLE_I18N  */
+
+/* Build the buffer PSTR->MBS, and apply the translation if we need.
+   This function is used in case of REG_ICASE.  */
+
+static void
+build_upper_buffer (re_string_t *pstr)
+{
+  Idx char_idx, end_idx;
+  end_idx = (pstr->bufs_len > pstr->len) ? pstr->len : pstr->bufs_len;
+
+  for (char_idx = pstr->valid_len; char_idx < end_idx; ++char_idx)
+    {
+      int ch = pstr->raw_mbs[pstr->raw_mbs_idx + char_idx];
+      if (__glibc_unlikely (pstr->trans != NULL))
+	ch = pstr->trans[ch];
+      pstr->mbs[char_idx] = toupper (ch);
+    }
+  pstr->valid_len = char_idx;
+  pstr->valid_raw_len = char_idx;
+}
+
+/* Apply TRANS to the buffer in PSTR.  */
+
+static void
+re_string_translate_buffer (re_string_t *pstr)
+{
+  Idx buf_idx, end_idx;
+  end_idx = (pstr->bufs_len > pstr->len) ? pstr->len : pstr->bufs_len;
+
+  for (buf_idx = pstr->valid_len; buf_idx < end_idx; ++buf_idx)
+    {
+      int ch = pstr->raw_mbs[pstr->raw_mbs_idx + buf_idx];
+      pstr->mbs[buf_idx] = pstr->trans[ch];
+    }
+
+  pstr->valid_len = buf_idx;
+  pstr->valid_raw_len = buf_idx;
+}
+
+/* This function re-construct the buffers.
+   Concretely, convert to wide character in case of pstr->mb_cur_max > 1,
+   convert to upper case in case of REG_ICASE, apply translation.  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+re_string_reconstruct (re_string_t *pstr, Idx idx, int eflags)
+{
+  Idx offset;
+
+  if (__glibc_unlikely (pstr->raw_mbs_idx <= idx))
+    offset = idx - pstr->raw_mbs_idx;
+  else
+    {
+      /* Reset buffer.  */
+#ifdef RE_ENABLE_I18N
+      if (pstr->mb_cur_max > 1)
+	memset (&pstr->cur_state, '\0', sizeof (mbstate_t));
+#endif /* RE_ENABLE_I18N */
+      pstr->len = pstr->raw_len;
+      pstr->stop = pstr->raw_stop;
+      pstr->valid_len = 0;
+      pstr->raw_mbs_idx = 0;
+      pstr->valid_raw_len = 0;
+      pstr->offsets_needed = 0;
+      pstr->tip_context = ((eflags & REG_NOTBOL) ? CONTEXT_BEGBUF
+			   : CONTEXT_NEWLINE | CONTEXT_BEGBUF);
+      if (!pstr->mbs_allocated)
+	pstr->mbs = (unsigned char *) pstr->raw_mbs;
+      offset = idx;
+    }
+
+  if (__glibc_likely (offset != 0))
+    {
+      /* Should the already checked characters be kept?  */
+      if (__glibc_likely (offset < pstr->valid_raw_len))
+	{
+	  /* Yes, move them to the front of the buffer.  */
+#ifdef RE_ENABLE_I18N
+	  if (__glibc_unlikely (pstr->offsets_needed))
+	    {
+	      Idx low = 0, high = pstr->valid_len, mid;
+	      do
+		{
+		  mid = (high + low) / 2;
+		  if (pstr->offsets[mid] > offset)
+		    high = mid;
+		  else if (pstr->offsets[mid] < offset)
+		    low = mid + 1;
+		  else
+		    break;
+		}
+	      while (low < high);
+	      if (pstr->offsets[mid] < offset)
+		++mid;
+	      pstr->tip_context = re_string_context_at (pstr, mid - 1,
+							eflags);
+	      /* This can be quite complicated, so handle specially
+		 only the common and easy case where the character with
+		 different length representation of lower and upper
+		 case is present at or after offset.  */
+	      if (pstr->valid_len > offset
+		  && mid == offset && pstr->offsets[mid] == offset)
+		{
+		  memmove (pstr->wcs, pstr->wcs + offset,
+			   (pstr->valid_len - offset) * sizeof (wint_t));
+		  memmove (pstr->mbs, pstr->mbs + offset, pstr->valid_len - offset);
+		  pstr->valid_len -= offset;
+		  pstr->valid_raw_len -= offset;
+		  for (low = 0; low < pstr->valid_len; low++)
+		    pstr->offsets[low] = pstr->offsets[low + offset] - offset;
+		}
+	      else
+		{
+		  /* Otherwise, just find out how long the partial multibyte
+		     character at offset is and fill it with WEOF/255.  */
+		  pstr->len = pstr->raw_len - idx + offset;
+		  pstr->stop = pstr->raw_stop - idx + offset;
+		  pstr->offsets_needed = 0;
+		  while (mid > 0 && pstr->offsets[mid - 1] == offset)
+		    --mid;
+		  while (mid < pstr->valid_len)
+		    if (pstr->wcs[mid] != WEOF)
+		      break;
+		    else
+		      ++mid;
+		  if (mid == pstr->valid_len)
+		    pstr->valid_len = 0;
+		  else
+		    {
+		      pstr->valid_len = pstr->offsets[mid] - offset;
+		      if (pstr->valid_len)
+			{
+			  for (low = 0; low < pstr->valid_len; ++low)
+			    pstr->wcs[low] = WEOF;
+			  memset (pstr->mbs, 255, pstr->valid_len);
+			}
+		    }
+		  pstr->valid_raw_len = pstr->valid_len;
+		}
+	    }
+	  else
+#endif
+	    {
+	      pstr->tip_context = re_string_context_at (pstr, offset - 1,
+							eflags);
+#ifdef RE_ENABLE_I18N
+	      if (pstr->mb_cur_max > 1)
+		memmove (pstr->wcs, pstr->wcs + offset,
+			 (pstr->valid_len - offset) * sizeof (wint_t));
+#endif /* RE_ENABLE_I18N */
+	      if (__glibc_unlikely (pstr->mbs_allocated))
+		memmove (pstr->mbs, pstr->mbs + offset,
+			 pstr->valid_len - offset);
+	      pstr->valid_len -= offset;
+	      pstr->valid_raw_len -= offset;
+	      DEBUG_ASSERT (pstr->valid_len > 0);
+	    }
+	}
+      else
+	{
+#ifdef RE_ENABLE_I18N
+	  /* No, skip all characters until IDX.  */
+	  Idx prev_valid_len = pstr->valid_len;
+
+	  if (__glibc_unlikely (pstr->offsets_needed))
+	    {
+	      pstr->len = pstr->raw_len - idx + offset;
+	      pstr->stop = pstr->raw_stop - idx + offset;
+	      pstr->offsets_needed = 0;
+	    }
+#endif
+	  pstr->valid_len = 0;
+#ifdef RE_ENABLE_I18N
+	  if (pstr->mb_cur_max > 1)
+	    {
+	      Idx wcs_idx;
+	      wint_t wc = WEOF;
+
+	      if (pstr->is_utf8)
+		{
+		  const unsigned char *raw, *p, *end;
+
+		  /* Special case UTF-8.  Multi-byte chars start with any
+		     byte other than 0x80 - 0xbf.  */
+		  raw = pstr->raw_mbs + pstr->raw_mbs_idx;
+		  end = raw + (offset - pstr->mb_cur_max);
+		  if (end < pstr->raw_mbs)
+		    end = pstr->raw_mbs;
+		  p = raw + offset - 1;
+#ifdef _LIBC
+		  /* We know the wchar_t encoding is UCS4, so for the simple
+		     case, ASCII characters, skip the conversion step.  */
+		  if (isascii (*p) && __glibc_likely (pstr->trans == NULL))
+		    {
+		      memset (&pstr->cur_state, '\0', sizeof (mbstate_t));
+		      /* pstr->valid_len = 0; */
+		      wc = (wchar_t) *p;
+		    }
+		  else
+#endif
+		    for (; p >= end; --p)
+		      if ((*p & 0xc0) != 0x80)
+			{
+			  mbstate_t cur_state;
+			  wchar_t wc2;
+			  Idx mlen = raw + pstr->len - p;
+			  unsigned char buf[6];
+			  size_t mbclen;
+
+			  const unsigned char *pp = p;
+			  if (__glibc_unlikely (pstr->trans != NULL))
+			    {
+			      int i = mlen < 6 ? mlen : 6;
+			      while (--i >= 0)
+				buf[i] = pstr->trans[p[i]];
+			      pp = buf;
+			    }
+			  /* XXX Don't use mbrtowc, we know which conversion
+			     to use (UTF-8 -> UCS4).  */
+			  memset (&cur_state, 0, sizeof (cur_state));
+			  mbclen = __mbrtowc (&wc2, (const char *) pp, mlen,
+					      &cur_state);
+			  if (raw + offset - p <= mbclen
+			      && mbclen < (size_t) -2)
+			    {
+			      memset (&pstr->cur_state, '\0',
+				      sizeof (mbstate_t));
+			      pstr->valid_len = mbclen - (raw + offset - p);
+			      wc = wc2;
+			    }
+			  break;
+			}
+		}
+
+	      if (wc == WEOF)
+		pstr->valid_len = re_string_skip_chars (pstr, idx, &wc) - idx;
+	      if (wc == WEOF)
+		pstr->tip_context
+		  = re_string_context_at (pstr, prev_valid_len - 1, eflags);
+	      else
+		pstr->tip_context = ((__glibc_unlikely (pstr->word_ops_used != 0)
+				      && IS_WIDE_WORD_CHAR (wc))
+				     ? CONTEXT_WORD
+				     : ((IS_WIDE_NEWLINE (wc)
+					 && pstr->newline_anchor)
+					? CONTEXT_NEWLINE : 0));
+	      if (__glibc_unlikely (pstr->valid_len))
+		{
+		  for (wcs_idx = 0; wcs_idx < pstr->valid_len; ++wcs_idx)
+		    pstr->wcs[wcs_idx] = WEOF;
+		  if (pstr->mbs_allocated)
+		    memset (pstr->mbs, 255, pstr->valid_len);
+		}
+	      pstr->valid_raw_len = pstr->valid_len;
+	    }
+	  else
+#endif /* RE_ENABLE_I18N */
+	    {
+	      int c = pstr->raw_mbs[pstr->raw_mbs_idx + offset - 1];
+	      pstr->valid_raw_len = 0;
+	      if (pstr->trans)
+		c = pstr->trans[c];
+	      pstr->tip_context = (bitset_contain (pstr->word_char, c)
+				   ? CONTEXT_WORD
+				   : ((IS_NEWLINE (c) && pstr->newline_anchor)
+				      ? CONTEXT_NEWLINE : 0));
+	    }
+	}
+      if (!__glibc_unlikely (pstr->mbs_allocated))
+	pstr->mbs += offset;
+    }
+  pstr->raw_mbs_idx = idx;
+  pstr->len -= offset;
+  pstr->stop -= offset;
+
+  /* Then build the buffers.  */
+#ifdef RE_ENABLE_I18N
+  if (pstr->mb_cur_max > 1)
+    {
+      if (pstr->icase)
+	{
+	  reg_errcode_t ret = build_wcs_upper_buffer (pstr);
+	  if (__glibc_unlikely (ret != REG_NOERROR))
+	    return ret;
+	}
+      else
+	build_wcs_buffer (pstr);
+    }
+  else
+#endif /* RE_ENABLE_I18N */
+    if (__glibc_unlikely (pstr->mbs_allocated))
+      {
+	if (pstr->icase)
+	  build_upper_buffer (pstr);
+	else if (pstr->trans != NULL)
+	  re_string_translate_buffer (pstr);
+      }
+    else
+      pstr->valid_len = pstr->len;
+
+  pstr->cur_idx = 0;
+  return REG_NOERROR;
+}
+
+static unsigned char
+__attribute__ ((pure))
+re_string_peek_byte_case (const re_string_t *pstr, Idx idx)
+{
+  int ch;
+  Idx off;
+
+  /* Handle the common (easiest) cases first.  */
+  if (__glibc_likely (!pstr->mbs_allocated))
+    return re_string_peek_byte (pstr, idx);
+
+#ifdef RE_ENABLE_I18N
+  if (pstr->mb_cur_max > 1
+      && ! re_string_is_single_byte_char (pstr, pstr->cur_idx + idx))
+    return re_string_peek_byte (pstr, idx);
+#endif
+
+  off = pstr->cur_idx + idx;
+#ifdef RE_ENABLE_I18N
+  if (pstr->offsets_needed)
+    off = pstr->offsets[off];
+#endif
+
+  ch = pstr->raw_mbs[pstr->raw_mbs_idx + off];
+
+#ifdef RE_ENABLE_I18N
+  /* Ensure that e.g. for tr_TR.UTF-8 BACKSLASH DOTLESS SMALL LETTER I
+     this function returns CAPITAL LETTER I instead of first byte of
+     DOTLESS SMALL LETTER I.  The latter would confuse the parser,
+     since peek_byte_case doesn't advance cur_idx in any way.  */
+  if (pstr->offsets_needed && !isascii (ch))
+    return re_string_peek_byte (pstr, idx);
+#endif
+
+  return ch;
+}
+
+static unsigned char
+re_string_fetch_byte_case (re_string_t *pstr)
+{
+  if (__glibc_likely (!pstr->mbs_allocated))
+    return re_string_fetch_byte (pstr);
+
+#ifdef RE_ENABLE_I18N
+  if (pstr->offsets_needed)
+    {
+      Idx off;
+      int ch;
+
+      /* For tr_TR.UTF-8 [[:islower:]] there is
+	 [[: CAPITAL LETTER I WITH DOT lower:]] in mbs.  Skip
+	 in that case the whole multi-byte character and return
+	 the original letter.  On the other side, with
+	 [[: DOTLESS SMALL LETTER I return [[:I, as doing
+	 anything else would complicate things too much.  */
+
+      if (!re_string_first_byte (pstr, pstr->cur_idx))
+	return re_string_fetch_byte (pstr);
+
+      off = pstr->offsets[pstr->cur_idx];
+      ch = pstr->raw_mbs[pstr->raw_mbs_idx + off];
+
+      if (! isascii (ch))
+	return re_string_fetch_byte (pstr);
+
+      re_string_skip_bytes (pstr,
+			    re_string_char_size_at (pstr, pstr->cur_idx));
+      return ch;
+    }
+#endif
+
+  return pstr->raw_mbs[pstr->raw_mbs_idx + pstr->cur_idx++];
+}
+
+static void
+re_string_destruct (re_string_t *pstr)
+{
+#ifdef RE_ENABLE_I18N
+  re_free (pstr->wcs);
+  re_free (pstr->offsets);
+#endif /* RE_ENABLE_I18N  */
+  if (pstr->mbs_allocated)
+    re_free (pstr->mbs);
+}
+
+/* Return the context at IDX in INPUT.  */
+
+static unsigned int
+re_string_context_at (const re_string_t *input, Idx idx, int eflags)
+{
+  int c;
+  if (__glibc_unlikely (idx < 0))
+    /* In this case, we use the value stored in input->tip_context,
+       since we can't know the character in input->mbs[-1] here.  */
+    return input->tip_context;
+  if (__glibc_unlikely (idx == input->len))
+    return ((eflags & REG_NOTEOL) ? CONTEXT_ENDBUF
+	    : CONTEXT_NEWLINE | CONTEXT_ENDBUF);
+#ifdef RE_ENABLE_I18N
+  if (input->mb_cur_max > 1)
+    {
+      wint_t wc;
+      Idx wc_idx = idx;
+      while(input->wcs[wc_idx] == WEOF)
+	{
+	  DEBUG_ASSERT (wc_idx >= 0);
+	  --wc_idx;
+	  if (wc_idx < 0)
+	    return input->tip_context;
+	}
+      wc = input->wcs[wc_idx];
+      if (__glibc_unlikely (input->word_ops_used != 0)
+	  && IS_WIDE_WORD_CHAR (wc))
+	return CONTEXT_WORD;
+      return (IS_WIDE_NEWLINE (wc) && input->newline_anchor
+	      ? CONTEXT_NEWLINE : 0);
+    }
+  else
+#endif
+    {
+      c = re_string_byte_at (input, idx);
+      if (bitset_contain (input->word_char, c))
+	return CONTEXT_WORD;
+      return IS_NEWLINE (c) && input->newline_anchor ? CONTEXT_NEWLINE : 0;
+    }
+}
+
+/* Functions for set operation.  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+re_node_set_alloc (re_node_set *set, Idx size)
+{
+  set->alloc = size;
+  set->nelem = 0;
+  set->elems = re_malloc (Idx, size);
+  if (__glibc_unlikely (set->elems == NULL)
+      && (MALLOC_0_IS_NONNULL || size != 0))
+    return REG_ESPACE;
+  return REG_NOERROR;
+}
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+re_node_set_init_1 (re_node_set *set, Idx elem)
+{
+  set->alloc = 1;
+  set->nelem = 1;
+  set->elems = re_malloc (Idx, 1);
+  if (__glibc_unlikely (set->elems == NULL))
+    {
+      set->alloc = set->nelem = 0;
+      return REG_ESPACE;
+    }
+  set->elems[0] = elem;
+  return REG_NOERROR;
+}
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+re_node_set_init_2 (re_node_set *set, Idx elem1, Idx elem2)
+{
+  set->alloc = 2;
+  set->elems = re_malloc (Idx, 2);
+  if (__glibc_unlikely (set->elems == NULL))
+    return REG_ESPACE;
+  if (elem1 == elem2)
+    {
+      set->nelem = 1;
+      set->elems[0] = elem1;
+    }
+  else
+    {
+      set->nelem = 2;
+      if (elem1 < elem2)
+	{
+	  set->elems[0] = elem1;
+	  set->elems[1] = elem2;
+	}
+      else
+	{
+	  set->elems[0] = elem2;
+	  set->elems[1] = elem1;
+	}
+    }
+  return REG_NOERROR;
+}
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+re_node_set_init_copy (re_node_set *dest, const re_node_set *src)
+{
+  dest->nelem = src->nelem;
+  if (src->nelem > 0)
+    {
+      dest->alloc = dest->nelem;
+      dest->elems = re_malloc (Idx, dest->alloc);
+      if (__glibc_unlikely (dest->elems == NULL))
+	{
+	  dest->alloc = dest->nelem = 0;
+	  return REG_ESPACE;
+	}
+      memcpy (dest->elems, src->elems, src->nelem * sizeof (Idx));
+    }
+  else
+    re_node_set_init_empty (dest);
+  return REG_NOERROR;
+}
+
+/* Calculate the intersection of the sets SRC1 and SRC2. And merge it to
+   DEST. Return value indicate the error code or REG_NOERROR if succeeded.
+   Note: We assume dest->elems is NULL, when dest->alloc is 0.  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+re_node_set_add_intersect (re_node_set *dest, const re_node_set *src1,
+			   const re_node_set *src2)
+{
+  Idx i1, i2, is, id, delta, sbase;
+  if (src1->nelem == 0 || src2->nelem == 0)
+    return REG_NOERROR;
+
+  /* We need dest->nelem + 2 * elems_in_intersection; this is a
+     conservative estimate.  */
+  if (src1->nelem + src2->nelem + dest->nelem > dest->alloc)
+    {
+      Idx new_alloc = src1->nelem + src2->nelem + dest->alloc;
+      Idx *new_elems = re_realloc (dest->elems, Idx, new_alloc);
+      if (__glibc_unlikely (new_elems == NULL))
+	return REG_ESPACE;
+      dest->elems = new_elems;
+      dest->alloc = new_alloc;
+    }
+
+  /* Find the items in the intersection of SRC1 and SRC2, and copy
+     into the top of DEST those that are not already in DEST itself.  */
+  sbase = dest->nelem + src1->nelem + src2->nelem;
+  i1 = src1->nelem - 1;
+  i2 = src2->nelem - 1;
+  id = dest->nelem - 1;
+  for (;;)
+    {
+      if (src1->elems[i1] == src2->elems[i2])
+	{
+	  /* Try to find the item in DEST.  Maybe we could binary search?  */
+	  while (id >= 0 && dest->elems[id] > src1->elems[i1])
+	    --id;
+
+	  if (id < 0 || dest->elems[id] != src1->elems[i1])
+            dest->elems[--sbase] = src1->elems[i1];
+
+	  if (--i1 < 0 || --i2 < 0)
+	    break;
+	}
+
+      /* Lower the highest of the two items.  */
+      else if (src1->elems[i1] < src2->elems[i2])
+	{
+	  if (--i2 < 0)
+	    break;
+	}
+      else
+	{
+	  if (--i1 < 0)
+	    break;
+	}
+    }
+
+  id = dest->nelem - 1;
+  is = dest->nelem + src1->nelem + src2->nelem - 1;
+  delta = is - sbase + 1;
+
+  /* Now copy.  When DELTA becomes zero, the remaining
+     DEST elements are already in place; this is more or
+     less the same loop that is in re_node_set_merge.  */
+  dest->nelem += delta;
+  if (delta > 0 && id >= 0)
+    for (;;)
+      {
+	if (dest->elems[is] > dest->elems[id])
+	  {
+	    /* Copy from the top.  */
+	    dest->elems[id + delta--] = dest->elems[is--];
+	    if (delta == 0)
+	      break;
+	  }
+	else
+	  {
+	    /* Slide from the bottom.  */
+	    dest->elems[id + delta] = dest->elems[id];
+	    if (--id < 0)
+	      break;
+	  }
+      }
+
+  /* Copy remaining SRC elements.  */
+  memcpy (dest->elems, dest->elems + sbase, delta * sizeof (Idx));
+
+  return REG_NOERROR;
+}
+
+/* Calculate the union set of the sets SRC1 and SRC2. And store it to
+   DEST. Return value indicate the error code or REG_NOERROR if succeeded.  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+re_node_set_init_union (re_node_set *dest, const re_node_set *src1,
+			const re_node_set *src2)
+{
+  Idx i1, i2, id;
+  if (src1 != NULL && src1->nelem > 0 && src2 != NULL && src2->nelem > 0)
+    {
+      dest->alloc = src1->nelem + src2->nelem;
+      dest->elems = re_malloc (Idx, dest->alloc);
+      if (__glibc_unlikely (dest->elems == NULL))
+	return REG_ESPACE;
+    }
+  else
+    {
+      if (src1 != NULL && src1->nelem > 0)
+	return re_node_set_init_copy (dest, src1);
+      else if (src2 != NULL && src2->nelem > 0)
+	return re_node_set_init_copy (dest, src2);
+      else
+	re_node_set_init_empty (dest);
+      return REG_NOERROR;
+    }
+  for (i1 = i2 = id = 0 ; i1 < src1->nelem && i2 < src2->nelem ;)
+    {
+      if (src1->elems[i1] > src2->elems[i2])
+	{
+	  dest->elems[id++] = src2->elems[i2++];
+	  continue;
+	}
+      if (src1->elems[i1] == src2->elems[i2])
+	++i2;
+      dest->elems[id++] = src1->elems[i1++];
+    }
+  if (i1 < src1->nelem)
+    {
+      memcpy (dest->elems + id, src1->elems + i1,
+	     (src1->nelem - i1) * sizeof (Idx));
+      id += src1->nelem - i1;
+    }
+  else if (i2 < src2->nelem)
+    {
+      memcpy (dest->elems + id, src2->elems + i2,
+	     (src2->nelem - i2) * sizeof (Idx));
+      id += src2->nelem - i2;
+    }
+  dest->nelem = id;
+  return REG_NOERROR;
+}
+
+/* Calculate the union set of the sets DEST and SRC. And store it to
+   DEST. Return value indicate the error code or REG_NOERROR if succeeded.  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+re_node_set_merge (re_node_set *dest, const re_node_set *src)
+{
+  Idx is, id, sbase, delta;
+  if (src == NULL || src->nelem == 0)
+    return REG_NOERROR;
+  if (dest->alloc < 2 * src->nelem + dest->nelem)
+    {
+      Idx new_alloc = 2 * (src->nelem + dest->alloc);
+      Idx *new_buffer = re_realloc (dest->elems, Idx, new_alloc);
+      if (__glibc_unlikely (new_buffer == NULL))
+	return REG_ESPACE;
+      dest->elems = new_buffer;
+      dest->alloc = new_alloc;
+    }
+
+  if (__glibc_unlikely (dest->nelem == 0))
+    {
+      /* Although we already guaranteed above that dest->alloc != 0 and
+         therefore dest->elems != NULL, add a debug assertion to pacify
+         GCC 11.2.1's -fanalyzer.  */
+      DEBUG_ASSERT (dest->elems);
+      dest->nelem = src->nelem;
+      memcpy (dest->elems, src->elems, src->nelem * sizeof (Idx));
+      return REG_NOERROR;
+    }
+
+  /* Copy into the top of DEST the items of SRC that are not
+     found in DEST.  Maybe we could binary search in DEST?  */
+  for (sbase = dest->nelem + 2 * src->nelem,
+       is = src->nelem - 1, id = dest->nelem - 1; is >= 0 && id >= 0; )
+    {
+      if (dest->elems[id] == src->elems[is])
+	is--, id--;
+      else if (dest->elems[id] < src->elems[is])
+	dest->elems[--sbase] = src->elems[is--];
+      else /* if (dest->elems[id] > src->elems[is]) */
+	--id;
+    }
+
+  if (is >= 0)
+    {
+      /* If DEST is exhausted, the remaining items of SRC must be unique.  */
+      sbase -= is + 1;
+      memcpy (dest->elems + sbase, src->elems, (is + 1) * sizeof (Idx));
+    }
+
+  id = dest->nelem - 1;
+  is = dest->nelem + 2 * src->nelem - 1;
+  delta = is - sbase + 1;
+  if (delta == 0)
+    return REG_NOERROR;
+
+  /* Now copy.  When DELTA becomes zero, the remaining
+     DEST elements are already in place.  */
+  dest->nelem += delta;
+  for (;;)
+    {
+      if (dest->elems[is] > dest->elems[id])
+	{
+	  /* Copy from the top.  */
+	  dest->elems[id + delta--] = dest->elems[is--];
+	  if (delta == 0)
+	    break;
+	}
+      else
+	{
+	  /* Slide from the bottom.  */
+	  dest->elems[id + delta] = dest->elems[id];
+	  if (--id < 0)
+	    {
+	      /* Copy remaining SRC elements.  */
+	      memcpy (dest->elems, dest->elems + sbase,
+		      delta * sizeof (Idx));
+	      break;
+	    }
+	}
+    }
+
+  return REG_NOERROR;
+}
+
+/* Insert the new element ELEM to the re_node_set* SET.
+   SET should not already have ELEM.
+   Return true if successful.  */
+
+static bool
+__attribute_warn_unused_result__
+re_node_set_insert (re_node_set *set, Idx elem)
+{
+  Idx idx;
+  /* In case the set is empty.  */
+  if (set->alloc == 0)
+    return __glibc_likely (re_node_set_init_1 (set, elem) == REG_NOERROR);
+
+  if (__glibc_unlikely (set->nelem) == 0)
+    {
+      /* Although we already guaranteed above that set->alloc != 0 and
+         therefore set->elems != NULL, add a debug assertion to pacify
+         GCC 11.2 -fanalyzer.  */
+      DEBUG_ASSERT (set->elems);
+      set->elems[0] = elem;
+      ++set->nelem;
+      return true;
+    }
+
+  /* Realloc if we need.  */
+  if (set->alloc == set->nelem)
+    {
+      Idx *new_elems;
+      set->alloc = set->alloc * 2;
+      new_elems = re_realloc (set->elems, Idx, set->alloc);
+      if (__glibc_unlikely (new_elems == NULL))
+	return false;
+      set->elems = new_elems;
+    }
+
+  /* Move the elements which follows the new element.  Test the
+     first element separately to skip a check in the inner loop.  */
+  if (elem < set->elems[0])
+    {
+      for (idx = set->nelem; idx > 0; idx--)
+	set->elems[idx] = set->elems[idx - 1];
+    }
+  else
+    {
+      for (idx = set->nelem; set->elems[idx - 1] > elem; idx--)
+	set->elems[idx] = set->elems[idx - 1];
+      DEBUG_ASSERT (set->elems[idx - 1] < elem);
+    }
+
+  /* Insert the new element.  */
+  set->elems[idx] = elem;
+  ++set->nelem;
+  return true;
+}
+
+/* Insert the new element ELEM to the re_node_set* SET.
+   SET should not already have any element greater than or equal to ELEM.
+   Return true if successful.  */
+
+static bool
+__attribute_warn_unused_result__
+re_node_set_insert_last (re_node_set *set, Idx elem)
+{
+  /* Realloc if we need.  */
+  if (set->alloc == set->nelem)
+    {
+      Idx *new_elems;
+      set->alloc = (set->alloc + 1) * 2;
+      new_elems = re_realloc (set->elems, Idx, set->alloc);
+      if (__glibc_unlikely (new_elems == NULL))
+	return false;
+      set->elems = new_elems;
+    }
+
+  /* Insert the new element.  */
+  set->elems[set->nelem++] = elem;
+  return true;
+}
+
+/* Compare two node sets SET1 and SET2.
+   Return true if SET1 and SET2 are equivalent.  */
+
+static bool
+__attribute__ ((pure))
+re_node_set_compare (const re_node_set *set1, const re_node_set *set2)
+{
+  Idx i;
+  if (set1 == NULL || set2 == NULL || set1->nelem != set2->nelem)
+    return false;
+  for (i = set1->nelem ; --i >= 0 ; )
+    if (set1->elems[i] != set2->elems[i])
+      return false;
+  return true;
+}
+
+/* Return (idx + 1) if SET contains the element ELEM, return 0 otherwise.  */
+
+static Idx
+__attribute__ ((pure))
+re_node_set_contains (const re_node_set *set, Idx elem)
+{
+  __re_size_t idx, right, mid;
+  if (set->nelem <= 0)
+    return 0;
+
+  /* Binary search the element.  */
+  idx = 0;
+  right = set->nelem - 1;
+  while (idx < right)
+    {
+      mid = (idx + right) / 2;
+      if (set->elems[mid] < elem)
+	idx = mid + 1;
+      else
+	right = mid;
+    }
+  return set->elems[idx] == elem ? idx + 1 : 0;
+}
+
+static void
+re_node_set_remove_at (re_node_set *set, Idx idx)
+{
+  if (idx < 0 || idx >= set->nelem)
+    return;
+  --set->nelem;
+  for (; idx < set->nelem; idx++)
+    set->elems[idx] = set->elems[idx + 1];
+}
+
+
+/* Add the token TOKEN to dfa->nodes, and return the index of the token.
+   Or return -1 if an error occurred.  */
+
+static Idx
+re_dfa_add_node (re_dfa_t *dfa, re_token_t token)
+{
+  if (__glibc_unlikely (dfa->nodes_len >= dfa->nodes_alloc))
+    {
+      size_t new_nodes_alloc = dfa->nodes_alloc * 2;
+      Idx *new_nexts, *new_indices;
+      re_node_set *new_edests, *new_eclosures;
+      re_token_t *new_nodes;
+
+      /* Avoid overflows in realloc.  */
+      const size_t max_object_size = MAX (sizeof (re_token_t),
+					  MAX (sizeof (re_node_set),
+					       sizeof (Idx)));
+      if (__glibc_unlikely (MIN (IDX_MAX, SIZE_MAX / max_object_size)
+			    < new_nodes_alloc))
+	return -1;
+
+      new_nodes = re_realloc (dfa->nodes, re_token_t, new_nodes_alloc);
+      if (__glibc_unlikely (new_nodes == NULL))
+	return -1;
+      dfa->nodes = new_nodes;
+      new_nexts = re_realloc (dfa->nexts, Idx, new_nodes_alloc);
+      new_indices = re_realloc (dfa->org_indices, Idx, new_nodes_alloc);
+      new_edests = re_realloc (dfa->edests, re_node_set, new_nodes_alloc);
+      new_eclosures = re_realloc (dfa->eclosures, re_node_set, new_nodes_alloc);
+      if (__glibc_unlikely (new_nexts == NULL || new_indices == NULL
+			    || new_edests == NULL || new_eclosures == NULL))
+	{
+	   re_free (new_nexts);
+	   re_free (new_indices);
+	   re_free (new_edests);
+	   re_free (new_eclosures);
+	   return -1;
+	}
+      dfa->nexts = new_nexts;
+      dfa->org_indices = new_indices;
+      dfa->edests = new_edests;
+      dfa->eclosures = new_eclosures;
+      dfa->nodes_alloc = new_nodes_alloc;
+    }
+  dfa->nodes[dfa->nodes_len] = token;
+  dfa->nodes[dfa->nodes_len].constraint = 0;
+#ifdef RE_ENABLE_I18N
+  dfa->nodes[dfa->nodes_len].accept_mb =
+    ((token.type == OP_PERIOD && dfa->mb_cur_max > 1)
+     || token.type == COMPLEX_BRACKET);
+#endif
+  dfa->nexts[dfa->nodes_len] = -1;
+  re_node_set_init_empty (dfa->edests + dfa->nodes_len);
+  re_node_set_init_empty (dfa->eclosures + dfa->nodes_len);
+  return dfa->nodes_len++;
+}
+
+static re_hashval_t
+calc_state_hash (const re_node_set *nodes, unsigned int context)
+{
+  re_hashval_t hash = nodes->nelem + context;
+  Idx i;
+  for (i = 0 ; i < nodes->nelem ; i++)
+    hash += nodes->elems[i];
+  return hash;
+}
+
+/* Search for the state whose node_set is equivalent to NODES.
+   Return the pointer to the state, if we found it in the DFA.
+   Otherwise create the new one and return it.  In case of an error
+   return NULL and set the error code in ERR.
+   Note: - We assume NULL as the invalid state, then it is possible that
+	   return value is NULL and ERR is REG_NOERROR.
+	 - We never return non-NULL value in case of any errors, it is for
+	   optimization.  */
+
+static re_dfastate_t *
+__attribute_warn_unused_result__
+re_acquire_state (reg_errcode_t *err, const re_dfa_t *dfa,
+		  const re_node_set *nodes)
+{
+  re_hashval_t hash;
+  re_dfastate_t *new_state;
+  struct re_state_table_entry *spot;
+  Idx i;
+#if defined GCC_LINT || defined lint
+  /* Suppress bogus uninitialized-variable warnings.  */
+  *err = REG_NOERROR;
+#endif
+  if (__glibc_unlikely (nodes->nelem == 0))
+    {
+      *err = REG_NOERROR;
+      return NULL;
+    }
+  hash = calc_state_hash (nodes, 0);
+  spot = dfa->state_table + (hash & dfa->state_hash_mask);
+
+  for (i = 0 ; i < spot->num ; i++)
+    {
+      re_dfastate_t *state = spot->array[i];
+      if (hash != state->hash)
+	continue;
+      if (re_node_set_compare (&state->nodes, nodes))
+	return state;
+    }
+
+  /* There are no appropriate state in the dfa, create the new one.  */
+  new_state = create_ci_newstate (dfa, nodes, hash);
+  if (__glibc_unlikely (new_state == NULL))
+    *err = REG_ESPACE;
+
+  return new_state;
+}
+
+/* Search for the state whose node_set is equivalent to NODES and
+   whose context is equivalent to CONTEXT.
+   Return the pointer to the state, if we found it in the DFA.
+   Otherwise create the new one and return it.  In case of an error
+   return NULL and set the error code in ERR.
+   Note: - We assume NULL as the invalid state, then it is possible that
+	   return value is NULL and ERR is REG_NOERROR.
+	 - We never return non-NULL value in case of any errors, it is for
+	   optimization.  */
+
+static re_dfastate_t *
+__attribute_warn_unused_result__
+re_acquire_state_context (reg_errcode_t *err, const re_dfa_t *dfa,
+			  const re_node_set *nodes, unsigned int context)
+{
+  re_hashval_t hash;
+  re_dfastate_t *new_state;
+  struct re_state_table_entry *spot;
+  Idx i;
+#if defined GCC_LINT || defined lint
+  /* Suppress bogus uninitialized-variable warnings.  */
+  *err = REG_NOERROR;
+#endif
+  if (nodes->nelem == 0)
+    {
+      *err = REG_NOERROR;
+      return NULL;
+    }
+  hash = calc_state_hash (nodes, context);
+  spot = dfa->state_table + (hash & dfa->state_hash_mask);
+
+  for (i = 0 ; i < spot->num ; i++)
+    {
+      re_dfastate_t *state = spot->array[i];
+      if (state->hash == hash
+	  && state->context == context
+	  && re_node_set_compare (state->entrance_nodes, nodes))
+	return state;
+    }
+  /* There are no appropriate state in 'dfa', create the new one.  */
+  new_state = create_cd_newstate (dfa, nodes, context, hash);
+  if (__glibc_unlikely (new_state == NULL))
+    *err = REG_ESPACE;
+
+  return new_state;
+}
+
+/* Finish initialization of the new state NEWSTATE, and using its hash value
+   HASH put in the appropriate bucket of DFA's state table.  Return value
+   indicates the error code if failed.  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+register_state (const re_dfa_t *dfa, re_dfastate_t *newstate,
+		re_hashval_t hash)
+{
+  struct re_state_table_entry *spot;
+  reg_errcode_t err;
+  Idx i;
+
+  newstate->hash = hash;
+  err = re_node_set_alloc (&newstate->non_eps_nodes, newstate->nodes.nelem);
+  if (__glibc_unlikely (err != REG_NOERROR))
+    return REG_ESPACE;
+  for (i = 0; i < newstate->nodes.nelem; i++)
+    {
+      Idx elem = newstate->nodes.elems[i];
+      if (!IS_EPSILON_NODE (dfa->nodes[elem].type))
+	if (! re_node_set_insert_last (&newstate->non_eps_nodes, elem))
+	  return REG_ESPACE;
+    }
+
+  spot = dfa->state_table + (hash & dfa->state_hash_mask);
+  if (__glibc_unlikely (spot->alloc <= spot->num))
+    {
+      Idx new_alloc = 2 * spot->num + 2;
+      re_dfastate_t **new_array = re_realloc (spot->array, re_dfastate_t *,
+					      new_alloc);
+      if (__glibc_unlikely (new_array == NULL))
+	return REG_ESPACE;
+      spot->array = new_array;
+      spot->alloc = new_alloc;
+    }
+  spot->array[spot->num++] = newstate;
+  return REG_NOERROR;
+}
+
+static void
+free_state (re_dfastate_t *state)
+{
+  re_node_set_free (&state->non_eps_nodes);
+  re_node_set_free (&state->inveclosure);
+  if (state->entrance_nodes != &state->nodes)
+    {
+      re_node_set_free (state->entrance_nodes);
+      re_free (state->entrance_nodes);
+    }
+  re_node_set_free (&state->nodes);
+  re_free (state->word_trtable);
+  re_free (state->trtable);
+  re_free (state);
+}
+
+/* Create the new state which is independent of contexts.
+   Return the new state if succeeded, otherwise return NULL.  */
+
+static re_dfastate_t *
+__attribute_warn_unused_result__
+create_ci_newstate (const re_dfa_t *dfa, const re_node_set *nodes,
+		    re_hashval_t hash)
+{
+  Idx i;
+  reg_errcode_t err;
+  re_dfastate_t *newstate;
+
+  newstate = (re_dfastate_t *) calloc (sizeof (re_dfastate_t), 1);
+  if (__glibc_unlikely (newstate == NULL))
+    return NULL;
+  err = re_node_set_init_copy (&newstate->nodes, nodes);
+  if (__glibc_unlikely (err != REG_NOERROR))
+    {
+      re_free (newstate);
+      return NULL;
+    }
+
+  newstate->entrance_nodes = &newstate->nodes;
+  for (i = 0 ; i < nodes->nelem ; i++)
+    {
+      re_token_t *node = dfa->nodes + nodes->elems[i];
+      re_token_type_t type = node->type;
+      if (type == CHARACTER && !node->constraint)
+	continue;
+#ifdef RE_ENABLE_I18N
+      newstate->accept_mb |= node->accept_mb;
+#endif /* RE_ENABLE_I18N */
+
+      /* If the state has the halt node, the state is a halt state.  */
+      if (type == END_OF_RE)
+	newstate->halt = 1;
+      else if (type == OP_BACK_REF)
+	newstate->has_backref = 1;
+      else if (type == ANCHOR || node->constraint)
+	newstate->has_constraint = 1;
+    }
+  err = register_state (dfa, newstate, hash);
+  if (__glibc_unlikely (err != REG_NOERROR))
+    {
+      free_state (newstate);
+      newstate = NULL;
+    }
+  return newstate;
+}
+
+/* Create the new state which is depend on the context CONTEXT.
+   Return the new state if succeeded, otherwise return NULL.  */
+
+static re_dfastate_t *
+__attribute_warn_unused_result__
+create_cd_newstate (const re_dfa_t *dfa, const re_node_set *nodes,
+		    unsigned int context, re_hashval_t hash)
+{
+  Idx i, nctx_nodes = 0;
+  reg_errcode_t err;
+  re_dfastate_t *newstate;
+
+  newstate = (re_dfastate_t *) calloc (sizeof (re_dfastate_t), 1);
+  if (__glibc_unlikely (newstate == NULL))
+    return NULL;
+  err = re_node_set_init_copy (&newstate->nodes, nodes);
+  if (__glibc_unlikely (err != REG_NOERROR))
+    {
+      re_free (newstate);
+      return NULL;
+    }
+
+  newstate->context = context;
+  newstate->entrance_nodes = &newstate->nodes;
+
+  for (i = 0 ; i < nodes->nelem ; i++)
+    {
+      re_token_t *node = dfa->nodes + nodes->elems[i];
+      re_token_type_t type = node->type;
+      unsigned int constraint = node->constraint;
+
+      if (type == CHARACTER && !constraint)
+	continue;
+#ifdef RE_ENABLE_I18N
+      newstate->accept_mb |= node->accept_mb;
+#endif /* RE_ENABLE_I18N */
+
+      /* If the state has the halt node, the state is a halt state.  */
+      if (type == END_OF_RE)
+	newstate->halt = 1;
+      else if (type == OP_BACK_REF)
+	newstate->has_backref = 1;
+
+      if (constraint)
+	{
+	  if (newstate->entrance_nodes == &newstate->nodes)
+	    {
+	      re_node_set *entrance_nodes = re_malloc (re_node_set, 1);
+	      if (__glibc_unlikely (entrance_nodes == NULL))
+		{
+		  free_state (newstate);
+		  return NULL;
+		}
+	      newstate->entrance_nodes = entrance_nodes;
+	      if (re_node_set_init_copy (newstate->entrance_nodes, nodes)
+		  != REG_NOERROR)
+		{
+		  free_state (newstate);
+		  return NULL;
+		}
+	      nctx_nodes = 0;
+	      newstate->has_constraint = 1;
+	    }
+
+	  if (NOT_SATISFY_PREV_CONSTRAINT (constraint,context))
+	    {
+	      re_node_set_remove_at (&newstate->nodes, i - nctx_nodes);
+	      ++nctx_nodes;
+	    }
+	}
+    }
+  err = register_state (dfa, newstate, hash);
+  if (__glibc_unlikely (err != REG_NOERROR))
+    {
+      free_state (newstate);
+      newstate = NULL;
+    }
+  return  newstate;
+}
diff --git a/src/grep/lib/regex_internal.h b/src/grep/lib/regex_internal.h
new file mode 100644
index 0000000..a4d26c6
--- /dev/null
+++ b/src/grep/lib/regex_internal.h
@@ -0,0 +1,848 @@
+/* Extended regular expression matching and search library.
+   Copyright (C) 2002-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _REGEX_INTERNAL_H
+#define _REGEX_INTERNAL_H 1
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if !defined(KMK_GREP) || !defined(_MSC_VER)
+#include <langinfo.h>
+#endif
+#include <locale.h>
+#include <wchar.h>
+#include <wctype.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+#ifndef _LIBC
+# include <dynarray.h>
+#endif
+
+#include <intprops.h>
+#include <verify.h>
+
+#if defined DEBUG && DEBUG != 0
+# include <assert.h>
+# define DEBUG_ASSERT(x) assert (x)
+#else
+# define DEBUG_ASSERT(x) assume (x)
+#endif
+
+#ifdef _LIBC
+# include <libc-lock.h>
+# define lock_define(name) __libc_lock_define (, name)
+# define lock_init(lock) (__libc_lock_init (lock), 0)
+# define lock_fini(lock) ((void) 0)
+# define lock_lock(lock) __libc_lock_lock (lock)
+# define lock_unlock(lock) __libc_lock_unlock (lock)
+#elif defined GNULIB_LOCK && !defined GNULIB_REGEX_SINGLE_THREAD
+# include "glthread/lock.h"
+# define lock_define(name) gl_lock_define (, name)
+# define lock_init(lock) glthread_lock_init (&(lock))
+# define lock_fini(lock) glthread_lock_destroy (&(lock))
+# define lock_lock(lock) glthread_lock_lock (&(lock))
+# define lock_unlock(lock) glthread_lock_unlock (&(lock))
+#elif defined GNULIB_PTHREAD && !defined GNULIB_REGEX_SINGLE_THREAD
+# include <pthread.h>
+# define lock_define(name) pthread_mutex_t name;
+# define lock_init(lock) pthread_mutex_init (&(lock), 0)
+# define lock_fini(lock) pthread_mutex_destroy (&(lock))
+# define lock_lock(lock) pthread_mutex_lock (&(lock))
+# define lock_unlock(lock) pthread_mutex_unlock (&(lock))
+#else
+# define lock_define(name)
+# define lock_init(lock) 0
+# define lock_fini(lock) ((void) 0)
+  /* The 'dfa' avoids an "unused variable 'dfa'" warning from GCC.  */
+# define lock_lock(lock) ((void) dfa)
+# define lock_unlock(lock) ((void) 0)
+#endif
+
+/* In case that the system doesn't have isblank().  */
+#if !defined _LIBC && ! (defined isblank || (HAVE_ISBLANK && HAVE_DECL_ISBLANK))
+# define isblank(ch) ((ch) == ' ' || (ch) == '\t')
+#endif
+
+/* regex code assumes isascii has its usual numeric meaning,
+   even if the portable character set uses EBCDIC encoding,
+   and even if wint_t is wider than int.  */
+#ifndef _LIBC
+# undef isascii
+# define isascii(c) (((c) & ~0x7f) == 0)
+#endif
+
+#ifdef _LIBC
+# ifndef _RE_DEFINE_LOCALE_FUNCTIONS
+#  define _RE_DEFINE_LOCALE_FUNCTIONS 1
+#   include <locale/localeinfo.h>
+#   include <locale/coll-lookup.h>
+# endif
+#endif
+
+/* This is for other GNU distributions with internationalized messages.  */
+#if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC
+# include <libintl.h>
+# ifdef _LIBC
+#  undef gettext
+#  define gettext(msgid) \
+  __dcgettext (_libc_intl_domainname, msgid, LC_MESSAGES)
+# endif
+#else
+# undef gettext
+# define gettext(msgid) (msgid)
+#endif
+
+#ifndef gettext_noop
+/* This define is so xgettext can find the internationalizable
+   strings.  */
+# define gettext_noop(String) String
+#endif
+
+#if (defined MB_CUR_MAX && HAVE_WCTYPE_H && HAVE_ISWCTYPE) || _LIBC
+# define RE_ENABLE_I18N
+#endif
+
+/* Number of ASCII characters.  */
+#define ASCII_CHARS 0x80
+
+/* Number of single byte characters.  */
+#define SBC_MAX (UCHAR_MAX + 1)
+
+#define COLL_ELEM_LEN_MAX 8
+
+/* The character which represents newline.  */
+#define NEWLINE_CHAR '\n'
+#define WIDE_NEWLINE_CHAR L'\n'
+
+/* Rename to standard API for using out of glibc.  */
+#ifndef _LIBC
+# undef __wctype
+# undef __iswalnum
+# undef __iswctype
+# undef __towlower
+# undef __towupper
+# define __wctype wctype
+# define __iswalnum iswalnum
+# define __iswctype iswctype
+# define __towlower towlower
+# define __towupper towupper
+# define __btowc btowc
+# define __mbrtowc mbrtowc
+# define __wcrtomb wcrtomb
+# define __regfree regfree
+#endif /* not _LIBC */
+
+#ifndef SSIZE_MAX
+# define SSIZE_MAX ((ssize_t) (SIZE_MAX / 2))
+#endif
+#ifndef ULONG_WIDTH
+# define ULONG_WIDTH REGEX_UINTEGER_WIDTH (ULONG_MAX)
+/* The number of usable bits in an unsigned integer type with maximum
+   value MAX, as an int expression suitable in #if.  Cover all known
+   practical hosts.  This implementation exploits the fact that MAX is
+   1 less than a power of 2, and merely counts the number of 1 bits in
+   MAX; "COBn" means "count the number of 1 bits in the low-order n bits".  */
+# define REGEX_UINTEGER_WIDTH(max) REGEX_COB128 (max)
+# define REGEX_COB128(n) (REGEX_COB64 ((n) >> 31 >> 31 >> 2) + REGEX_COB64 (n))
+# define REGEX_COB64(n) (REGEX_COB32 ((n) >> 31 >> 1) + REGEX_COB32 (n))
+# define REGEX_COB32(n) (REGEX_COB16 ((n) >> 16) + REGEX_COB16 (n))
+# define REGEX_COB16(n) (REGEX_COB8 ((n) >> 8) + REGEX_COB8 (n))
+# define REGEX_COB8(n) (REGEX_COB4 ((n) >> 4) + REGEX_COB4 (n))
+# define REGEX_COB4(n) (!!((n) & 8) + !!((n) & 4) + !!((n) & 2) + ((n) & 1))
+# if ULONG_MAX / 2 + 1 != 1ul << (ULONG_WIDTH - 1)
+#  error "ULONG_MAX out of range"
+# endif
+#endif
+
+/* The type of indexes into strings.  This is signed, not size_t,
+   since the API requires indexes to fit in regoff_t anyway, and using
+   signed integers makes the code a bit smaller and presumably faster.
+   The traditional GNU regex implementation uses int for indexes.
+   The POSIX-compatible implementation uses a possibly-wider type.
+   The name 'Idx' is three letters to minimize the hassle of
+   reindenting a lot of regex code that formerly used 'int'.  */
+typedef regoff_t Idx;
+#ifdef _REGEX_LARGE_OFFSETS
+# define IDX_MAX SSIZE_MAX
+#else
+# define IDX_MAX INT_MAX
+#endif
+
+/* A hash value, suitable for computing hash tables.  */
+typedef __re_size_t re_hashval_t;
+
+/* An integer used to represent a set of bits.  It must be unsigned,
+   and must be at least as wide as unsigned int.  */
+typedef unsigned long int bitset_word_t;
+/* All bits set in a bitset_word_t.  */
+#define BITSET_WORD_MAX ULONG_MAX
+/* Number of bits in a bitset_word_t.  */
+#define BITSET_WORD_BITS ULONG_WIDTH
+
+/* Number of bitset_word_t values in a bitset_t.  */
+#define BITSET_WORDS ((SBC_MAX + BITSET_WORD_BITS - 1) / BITSET_WORD_BITS)
+
+typedef bitset_word_t bitset_t[BITSET_WORDS];
+typedef bitset_word_t *re_bitset_ptr_t;
+typedef const bitset_word_t *re_const_bitset_ptr_t;
+
+#define PREV_WORD_CONSTRAINT 0x0001
+#define PREV_NOTWORD_CONSTRAINT 0x0002
+#define NEXT_WORD_CONSTRAINT 0x0004
+#define NEXT_NOTWORD_CONSTRAINT 0x0008
+#define PREV_NEWLINE_CONSTRAINT 0x0010
+#define NEXT_NEWLINE_CONSTRAINT 0x0020
+#define PREV_BEGBUF_CONSTRAINT 0x0040
+#define NEXT_ENDBUF_CONSTRAINT 0x0080
+#define WORD_DELIM_CONSTRAINT 0x0100
+#define NOT_WORD_DELIM_CONSTRAINT 0x0200
+
+typedef enum
+{
+  INSIDE_WORD = PREV_WORD_CONSTRAINT | NEXT_WORD_CONSTRAINT,
+  WORD_FIRST = PREV_NOTWORD_CONSTRAINT | NEXT_WORD_CONSTRAINT,
+  WORD_LAST = PREV_WORD_CONSTRAINT | NEXT_NOTWORD_CONSTRAINT,
+  INSIDE_NOTWORD = PREV_NOTWORD_CONSTRAINT | NEXT_NOTWORD_CONSTRAINT,
+  LINE_FIRST = PREV_NEWLINE_CONSTRAINT,
+  LINE_LAST = NEXT_NEWLINE_CONSTRAINT,
+  BUF_FIRST = PREV_BEGBUF_CONSTRAINT,
+  BUF_LAST = NEXT_ENDBUF_CONSTRAINT,
+  WORD_DELIM = WORD_DELIM_CONSTRAINT,
+  NOT_WORD_DELIM = NOT_WORD_DELIM_CONSTRAINT
+} re_context_type;
+
+typedef struct
+{
+  Idx alloc;
+  Idx nelem;
+  Idx *elems;
+} re_node_set;
+
+typedef enum
+{
+  NON_TYPE = 0,
+
+  /* Node type, These are used by token, node, tree.  */
+  CHARACTER = 1,
+  END_OF_RE = 2,
+  SIMPLE_BRACKET = 3,
+  OP_BACK_REF = 4,
+  OP_PERIOD = 5,
+#ifdef RE_ENABLE_I18N
+  COMPLEX_BRACKET = 6,
+  OP_UTF8_PERIOD = 7,
+#endif /* RE_ENABLE_I18N */
+
+  /* We define EPSILON_BIT as a macro so that OP_OPEN_SUBEXP is used
+     when the debugger shows values of this enum type.  */
+#define EPSILON_BIT 8
+  OP_OPEN_SUBEXP = EPSILON_BIT | 0,
+  OP_CLOSE_SUBEXP = EPSILON_BIT | 1,
+  OP_ALT = EPSILON_BIT | 2,
+  OP_DUP_ASTERISK = EPSILON_BIT | 3,
+  ANCHOR = EPSILON_BIT | 4,
+
+  /* Tree type, these are used only by tree. */
+  CONCAT = 16,
+  SUBEXP = 17,
+
+  /* Token type, these are used only by token.  */
+  OP_DUP_PLUS = 18,
+  OP_DUP_QUESTION,
+  OP_OPEN_BRACKET,
+  OP_CLOSE_BRACKET,
+  OP_CHARSET_RANGE,
+  OP_OPEN_DUP_NUM,
+  OP_CLOSE_DUP_NUM,
+  OP_NON_MATCH_LIST,
+  OP_OPEN_COLL_ELEM,
+  OP_CLOSE_COLL_ELEM,
+  OP_OPEN_EQUIV_CLASS,
+  OP_CLOSE_EQUIV_CLASS,
+  OP_OPEN_CHAR_CLASS,
+  OP_CLOSE_CHAR_CLASS,
+  OP_WORD,
+  OP_NOTWORD,
+  OP_SPACE,
+  OP_NOTSPACE,
+  BACK_SLASH
+
+} re_token_type_t;
+
+#ifdef RE_ENABLE_I18N
+typedef struct
+{
+  /* Multibyte characters.  */
+  wchar_t *mbchars;
+
+  /* Collating symbols.  */
+# ifdef _LIBC
+  int32_t *coll_syms;
+# endif
+
+  /* Equivalence classes. */
+# ifdef _LIBC
+  int32_t *equiv_classes;
+# endif
+
+  /* Range expressions. */
+# ifdef _LIBC
+  uint32_t *range_starts;
+  uint32_t *range_ends;
+# else /* not _LIBC */
+  wchar_t *range_starts;
+  wchar_t *range_ends;
+# endif /* not _LIBC */
+
+  /* Character classes. */
+  wctype_t *char_classes;
+
+  /* If this character set is the non-matching list.  */
+  unsigned int non_match : 1;
+
+  /* # of multibyte characters.  */
+  Idx nmbchars;
+
+  /* # of collating symbols.  */
+  Idx ncoll_syms;
+
+  /* # of equivalence classes. */
+  Idx nequiv_classes;
+
+  /* # of range expressions. */
+  Idx nranges;
+
+  /* # of character classes. */
+  Idx nchar_classes;
+} re_charset_t;
+#endif /* RE_ENABLE_I18N */
+
+typedef struct
+{
+  union
+  {
+    unsigned char c;		/* for CHARACTER */
+    re_bitset_ptr_t sbcset;	/* for SIMPLE_BRACKET */
+#ifdef RE_ENABLE_I18N
+    re_charset_t *mbcset;	/* for COMPLEX_BRACKET */
+#endif /* RE_ENABLE_I18N */
+    Idx idx;			/* for BACK_REF */
+    re_context_type ctx_type;	/* for ANCHOR */
+  } opr;
+#if (__GNUC__ >= 2 || defined __clang__) && !defined __STRICT_ANSI__
+  re_token_type_t type : 8;
+#else
+  re_token_type_t type;
+#endif
+  unsigned int constraint : 10;	/* context constraint */
+  unsigned int duplicated : 1;
+  unsigned int opt_subexp : 1;
+#ifdef RE_ENABLE_I18N
+  unsigned int accept_mb : 1;
+  /* These 2 bits can be moved into the union if needed (e.g. if running out
+     of bits; move opr.c to opr.c.c and move the flags to opr.c.flags).  */
+  unsigned int mb_partial : 1;
+#endif
+  unsigned int word_char : 1;
+} re_token_t;
+
+#define IS_EPSILON_NODE(type) ((type) & EPSILON_BIT)
+
+struct re_string_t
+{
+  /* Indicate the raw buffer which is the original string passed as an
+     argument of regexec(), re_search(), etc..  */
+  const unsigned char *raw_mbs;
+  /* Store the multibyte string.  In case of "case insensitive mode" like
+     REG_ICASE, upper cases of the string are stored, otherwise MBS points
+     the same address that RAW_MBS points.  */
+  unsigned char *mbs;
+#ifdef RE_ENABLE_I18N
+  /* Store the wide character string which is corresponding to MBS.  */
+  wint_t *wcs;
+  Idx *offsets;
+  mbstate_t cur_state;
+#endif
+  /* Index in RAW_MBS.  Each character mbs[i] corresponds to
+     raw_mbs[raw_mbs_idx + i].  */
+  Idx raw_mbs_idx;
+  /* The length of the valid characters in the buffers.  */
+  Idx valid_len;
+  /* The corresponding number of bytes in raw_mbs array.  */
+  Idx valid_raw_len;
+  /* The length of the buffers MBS and WCS.  */
+  Idx bufs_len;
+  /* The index in MBS, which is updated by re_string_fetch_byte.  */
+  Idx cur_idx;
+  /* length of RAW_MBS array.  */
+  Idx raw_len;
+  /* This is RAW_LEN - RAW_MBS_IDX + VALID_LEN - VALID_RAW_LEN.  */
+  Idx len;
+  /* End of the buffer may be shorter than its length in the cases such
+     as re_match_2, re_search_2.  Then, we use STOP for end of the buffer
+     instead of LEN.  */
+  Idx raw_stop;
+  /* This is RAW_STOP - RAW_MBS_IDX adjusted through OFFSETS.  */
+  Idx stop;
+
+  /* The context of mbs[0].  We store the context independently, since
+     the context of mbs[0] may be different from raw_mbs[0], which is
+     the beginning of the input string.  */
+  unsigned int tip_context;
+  /* The translation passed as a part of an argument of re_compile_pattern.  */
+  RE_TRANSLATE_TYPE trans;
+  /* Copy of re_dfa_t's word_char.  */
+  re_const_bitset_ptr_t word_char;
+  /* true if REG_ICASE.  */
+  unsigned char icase;
+  unsigned char is_utf8;
+  unsigned char map_notascii;
+  unsigned char mbs_allocated;
+  unsigned char offsets_needed;
+  unsigned char newline_anchor;
+  unsigned char word_ops_used;
+  int mb_cur_max;
+};
+typedef struct re_string_t re_string_t;
+
+
+struct re_dfa_t;
+typedef struct re_dfa_t re_dfa_t;
+
+#ifndef _LIBC
+# define IS_IN(libc) false
+#endif
+
+#define re_string_peek_byte(pstr, offset) \
+  ((pstr)->mbs[(pstr)->cur_idx + offset])
+#define re_string_fetch_byte(pstr) \
+  ((pstr)->mbs[(pstr)->cur_idx++])
+#define re_string_first_byte(pstr, idx) \
+  ((idx) == (pstr)->valid_len || (pstr)->wcs[idx] != WEOF)
+#define re_string_is_single_byte_char(pstr, idx) \
+  ((pstr)->wcs[idx] != WEOF && ((pstr)->valid_len == (idx) + 1 \
+				|| (pstr)->wcs[(idx) + 1] != WEOF))
+#define re_string_eoi(pstr) ((pstr)->stop <= (pstr)->cur_idx)
+#define re_string_cur_idx(pstr) ((pstr)->cur_idx)
+#define re_string_get_buffer(pstr) ((pstr)->mbs)
+#define re_string_length(pstr) ((pstr)->len)
+#define re_string_byte_at(pstr,idx) ((pstr)->mbs[idx])
+#define re_string_skip_bytes(pstr,idx) ((pstr)->cur_idx += (idx))
+#define re_string_set_index(pstr,idx) ((pstr)->cur_idx = (idx))
+
+#ifdef _LIBC
+# define MALLOC_0_IS_NONNULL 1
+#elif !defined MALLOC_0_IS_NONNULL
+# define MALLOC_0_IS_NONNULL 0
+#endif
+
+#ifndef MAX
+# define MAX(a,b) ((a) < (b) ? (b) : (a))
+#endif
+#ifndef MIN
+# define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
+
+#define re_malloc(t,n) ((t *) malloc ((n) * sizeof (t)))
+#define re_realloc(p,t,n) ((t *) realloc (p, (n) * sizeof (t)))
+#define re_free(p) free (p)
+
+struct bin_tree_t
+{
+  struct bin_tree_t *parent;
+  struct bin_tree_t *left;
+  struct bin_tree_t *right;
+  struct bin_tree_t *first;
+  struct bin_tree_t *next;
+
+  re_token_t token;
+
+  /* 'node_idx' is the index in dfa->nodes, if 'type' == 0.
+     Otherwise 'type' indicate the type of this node.  */
+  Idx node_idx;
+};
+typedef struct bin_tree_t bin_tree_t;
+
+#define BIN_TREE_STORAGE_SIZE \
+  ((1024 - sizeof (void *)) / sizeof (bin_tree_t))
+
+struct bin_tree_storage_t
+{
+  struct bin_tree_storage_t *next;
+  bin_tree_t data[BIN_TREE_STORAGE_SIZE];
+};
+typedef struct bin_tree_storage_t bin_tree_storage_t;
+
+#define CONTEXT_WORD 1
+#define CONTEXT_NEWLINE (CONTEXT_WORD << 1)
+#define CONTEXT_BEGBUF (CONTEXT_NEWLINE << 1)
+#define CONTEXT_ENDBUF (CONTEXT_BEGBUF << 1)
+
+#define IS_WORD_CONTEXT(c) ((c) & CONTEXT_WORD)
+#define IS_NEWLINE_CONTEXT(c) ((c) & CONTEXT_NEWLINE)
+#define IS_BEGBUF_CONTEXT(c) ((c) & CONTEXT_BEGBUF)
+#define IS_ENDBUF_CONTEXT(c) ((c) & CONTEXT_ENDBUF)
+#define IS_ORDINARY_CONTEXT(c) ((c) == 0)
+
+#define IS_WORD_CHAR(ch) (isalnum (ch) || (ch) == '_')
+#define IS_NEWLINE(ch) ((ch) == NEWLINE_CHAR)
+#define IS_WIDE_WORD_CHAR(ch) (__iswalnum (ch) || (ch) == L'_')
+#define IS_WIDE_NEWLINE(ch) ((ch) == WIDE_NEWLINE_CHAR)
+
+#define NOT_SATISFY_PREV_CONSTRAINT(constraint,context) \
+ ((((constraint) & PREV_WORD_CONSTRAINT) && !IS_WORD_CONTEXT (context)) \
+  || ((constraint & PREV_NOTWORD_CONSTRAINT) && IS_WORD_CONTEXT (context)) \
+  || ((constraint & PREV_NEWLINE_CONSTRAINT) && !IS_NEWLINE_CONTEXT (context))\
+  || ((constraint & PREV_BEGBUF_CONSTRAINT) && !IS_BEGBUF_CONTEXT (context)))
+
+#define NOT_SATISFY_NEXT_CONSTRAINT(constraint,context) \
+ ((((constraint) & NEXT_WORD_CONSTRAINT) && !IS_WORD_CONTEXT (context)) \
+  || (((constraint) & NEXT_NOTWORD_CONSTRAINT) && IS_WORD_CONTEXT (context)) \
+  || (((constraint) & NEXT_NEWLINE_CONSTRAINT) && !IS_NEWLINE_CONTEXT (context)) \
+  || (((constraint) & NEXT_ENDBUF_CONSTRAINT) && !IS_ENDBUF_CONTEXT (context)))
+
+struct re_dfastate_t
+{
+  re_hashval_t hash;
+  re_node_set nodes;
+  re_node_set non_eps_nodes;
+  re_node_set inveclosure;
+  re_node_set *entrance_nodes;
+  struct re_dfastate_t **trtable, **word_trtable;
+  unsigned int context : 4;
+  unsigned int halt : 1;
+  /* If this state can accept "multi byte".
+     Note that we refer to multibyte characters, and multi character
+     collating elements as "multi byte".  */
+  unsigned int accept_mb : 1;
+  /* If this state has backreference node(s).  */
+  unsigned int has_backref : 1;
+  unsigned int has_constraint : 1;
+};
+typedef struct re_dfastate_t re_dfastate_t;
+
+struct re_state_table_entry
+{
+  Idx num;
+  Idx alloc;
+  re_dfastate_t **array;
+};
+
+/* Array type used in re_sub_match_last_t and re_sub_match_top_t.  */
+
+typedef struct
+{
+  Idx next_idx;
+  Idx alloc;
+  re_dfastate_t **array;
+} state_array_t;
+
+/* Store information about the node NODE whose type is OP_CLOSE_SUBEXP.  */
+
+typedef struct
+{
+  Idx node;
+  Idx str_idx; /* The position NODE match at.  */
+  state_array_t path;
+} re_sub_match_last_t;
+
+/* Store information about the node NODE whose type is OP_OPEN_SUBEXP.
+   And information about the node, whose type is OP_CLOSE_SUBEXP,
+   corresponding to NODE is stored in LASTS.  */
+
+typedef struct
+{
+  Idx str_idx;
+  Idx node;
+  state_array_t *path;
+  Idx alasts; /* Allocation size of LASTS.  */
+  Idx nlasts; /* The number of LASTS.  */
+  re_sub_match_last_t **lasts;
+} re_sub_match_top_t;
+
+struct re_backref_cache_entry
+{
+  Idx node;
+  Idx str_idx;
+  Idx subexp_from;
+  Idx subexp_to;
+  bitset_word_t eps_reachable_subexps_map;
+  char more;
+};
+
+typedef struct
+{
+  /* The string object corresponding to the input string.  */
+  re_string_t input;
+  const re_dfa_t *const dfa;
+  /* EFLAGS of the argument of regexec.  */
+  int eflags;
+  /* Where the matching ends.  */
+  Idx match_last;
+  Idx last_node;
+  /* The state log used by the matcher.  */
+  re_dfastate_t **state_log;
+  Idx state_log_top;
+  /* Back reference cache.  */
+  Idx nbkref_ents;
+  Idx abkref_ents;
+  struct re_backref_cache_entry *bkref_ents;
+  int max_mb_elem_len;
+  Idx nsub_tops;
+  Idx asub_tops;
+  re_sub_match_top_t **sub_tops;
+} re_match_context_t;
+
+typedef struct
+{
+  re_dfastate_t **sifted_states;
+  re_dfastate_t **limited_states;
+  Idx last_node;
+  Idx last_str_idx;
+  re_node_set limits;
+} re_sift_context_t;
+
+struct re_fail_stack_ent_t
+{
+  Idx idx;
+  Idx node;
+  regmatch_t *regs;
+  re_node_set eps_via_nodes;
+};
+
+struct re_fail_stack_t
+{
+  Idx num;
+  Idx alloc;
+  struct re_fail_stack_ent_t *stack;
+};
+
+struct re_dfa_t
+{
+  re_token_t *nodes;
+  size_t nodes_alloc;
+  size_t nodes_len;
+  Idx *nexts;
+  Idx *org_indices;
+  re_node_set *edests;
+  re_node_set *eclosures;
+  re_node_set *inveclosures;
+  struct re_state_table_entry *state_table;
+  re_dfastate_t *init_state;
+  re_dfastate_t *init_state_word;
+  re_dfastate_t *init_state_nl;
+  re_dfastate_t *init_state_begbuf;
+  bin_tree_t *str_tree;
+  bin_tree_storage_t *str_tree_storage;
+  re_bitset_ptr_t sb_char;
+  int str_tree_storage_idx;
+
+  /* number of subexpressions 're_nsub' is in regex_t.  */
+  re_hashval_t state_hash_mask;
+  Idx init_node;
+  Idx nbackref; /* The number of backreference in this dfa.  */
+
+  /* Bitmap expressing which backreference is used.  */
+  bitset_word_t used_bkref_map;
+  bitset_word_t completed_bkref_map;
+
+  unsigned int has_plural_match : 1;
+  /* If this dfa has "multibyte node", which is a backreference or
+     a node which can accept multibyte character or multi character
+     collating element.  */
+  unsigned int has_mb_node : 1;
+  unsigned int is_utf8 : 1;
+  unsigned int map_notascii : 1;
+  unsigned int word_ops_used : 1;
+  int mb_cur_max;
+  bitset_t word_char;
+  reg_syntax_t syntax;
+  Idx *subexp_map;
+#ifdef DEBUG
+  char* re_str;
+#endif
+  lock_define (lock)
+};
+
+#define re_node_set_init_empty(set) memset (set, '\0', sizeof (re_node_set))
+#define re_node_set_remove(set,id) \
+  (re_node_set_remove_at (set, re_node_set_contains (set, id) - 1))
+#define re_node_set_empty(p) ((p)->nelem = 0)
+#define re_node_set_free(set) re_free ((set)->elems)
+
+
+typedef enum
+{
+  SB_CHAR,
+  MB_CHAR,
+  EQUIV_CLASS,
+  COLL_SYM,
+  CHAR_CLASS
+} bracket_elem_type;
+
+typedef struct
+{
+  bracket_elem_type type;
+  union
+  {
+    unsigned char ch;
+    unsigned char *name;
+    wchar_t wch;
+  } opr;
+} bracket_elem_t;
+
+
+/* Functions for bitset_t operation.  */
+
+static inline void
+bitset_set (bitset_t set, Idx i)
+{
+  set[i / BITSET_WORD_BITS] |= (bitset_word_t) 1 << i % BITSET_WORD_BITS;
+}
+
+static inline void
+bitset_clear (bitset_t set, Idx i)
+{
+  set[i / BITSET_WORD_BITS] &= ~ ((bitset_word_t) 1 << i % BITSET_WORD_BITS);
+}
+
+static inline bool
+bitset_contain (const bitset_t set, Idx i)
+{
+  return (set[i / BITSET_WORD_BITS] >> i % BITSET_WORD_BITS) & 1;
+}
+
+static inline void
+bitset_empty (bitset_t set)
+{
+  memset (set, '\0', sizeof (bitset_t));
+}
+
+static inline void
+bitset_set_all (bitset_t set)
+{
+  memset (set, -1, sizeof (bitset_word_t) * (SBC_MAX / BITSET_WORD_BITS));
+  if (SBC_MAX % BITSET_WORD_BITS != 0)
+    set[BITSET_WORDS - 1] =
+      ((bitset_word_t) 1 << SBC_MAX % BITSET_WORD_BITS) - 1;
+}
+
+static inline void
+bitset_copy (bitset_t dest, const bitset_t src)
+{
+  memcpy (dest, src, sizeof (bitset_t));
+}
+
+static inline void
+bitset_not (bitset_t set)
+{
+  int bitset_i;
+  for (bitset_i = 0; bitset_i < SBC_MAX / BITSET_WORD_BITS; ++bitset_i)
+    set[bitset_i] = ~set[bitset_i];
+  if (SBC_MAX % BITSET_WORD_BITS != 0)
+    set[BITSET_WORDS - 1] =
+      ((((bitset_word_t) 1 << SBC_MAX % BITSET_WORD_BITS) - 1)
+       & ~set[BITSET_WORDS - 1]);
+}
+
+static inline void
+bitset_merge (bitset_t dest, const bitset_t src)
+{
+  int bitset_i;
+  for (bitset_i = 0; bitset_i < BITSET_WORDS; ++bitset_i)
+    dest[bitset_i] |= src[bitset_i];
+}
+
+static inline void
+bitset_mask (bitset_t dest, const bitset_t src)
+{
+  int bitset_i;
+  for (bitset_i = 0; bitset_i < BITSET_WORDS; ++bitset_i)
+    dest[bitset_i] &= src[bitset_i];
+}
+
+#ifdef RE_ENABLE_I18N
+/* Functions for re_string.  */
+static int
+__attribute__ ((pure, unused))
+re_string_char_size_at (const re_string_t *pstr, Idx idx)
+{
+  int byte_idx;
+  if (pstr->mb_cur_max == 1)
+    return 1;
+  for (byte_idx = 1; idx + byte_idx < pstr->valid_len; ++byte_idx)
+    if (pstr->wcs[idx + byte_idx] != WEOF)
+      break;
+  return byte_idx;
+}
+
+static wint_t
+__attribute__ ((pure, unused))
+re_string_wchar_at (const re_string_t *pstr, Idx idx)
+{
+  if (pstr->mb_cur_max == 1)
+    return (wint_t) pstr->mbs[idx];
+  return (wint_t) pstr->wcs[idx];
+}
+
+# ifdef _LIBC
+#  include <locale/weight.h>
+# endif
+
+static int
+__attribute__ ((pure, unused))
+re_string_elem_size_at (const re_string_t *pstr, Idx idx)
+{
+# ifdef _LIBC
+  const unsigned char *p, *extra;
+  const int32_t *table, *indirect;
+  uint_fast32_t nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
+
+  if (nrules != 0)
+    {
+      table = (const int32_t *) _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEMB);
+      extra = (const unsigned char *)
+	_NL_CURRENT (LC_COLLATE, _NL_COLLATE_EXTRAMB);
+      indirect = (const int32_t *) _NL_CURRENT (LC_COLLATE,
+						_NL_COLLATE_INDIRECTMB);
+      p = pstr->mbs + idx;
+      findidx (table, indirect, extra, &p, pstr->len - idx);
+      return p - pstr->mbs - idx;
+    }
+  else
+# endif /* _LIBC */
+    return 1;
+}
+#endif /* RE_ENABLE_I18N */
+
+#ifdef _LIBC
+# if __GNUC__ >= 7
+#  define FALLTHROUGH __attribute__ ((__fallthrough__))
+# else
+#  define FALLTHROUGH ((void) 0)
+# endif
+#else
+# include "attribute.h"
+#endif
+
+#endif /*  _REGEX_INTERNAL_H */
diff --git a/src/grep/lib/regexec.c b/src/grep/lib/regexec.c
new file mode 100644
index 0000000..5e4eb49
--- /dev/null
+++ b/src/grep/lib/regexec.c
@@ -0,0 +1,4264 @@
+/* Extended regular expression matching and search library.
+   Copyright (C) 2002-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+static reg_errcode_t match_ctx_init (re_match_context_t *cache, int eflags,
+				     Idx n);
+static void match_ctx_clean (re_match_context_t *mctx);
+static void match_ctx_free (re_match_context_t *cache);
+static reg_errcode_t match_ctx_add_entry (re_match_context_t *cache, Idx node,
+					  Idx str_idx, Idx from, Idx to);
+static Idx search_cur_bkref_entry (const re_match_context_t *mctx, Idx str_idx);
+static reg_errcode_t match_ctx_add_subtop (re_match_context_t *mctx, Idx node,
+					   Idx str_idx);
+static re_sub_match_last_t * match_ctx_add_sublast (re_sub_match_top_t *subtop,
+						    Idx node, Idx str_idx);
+static void sift_ctx_init (re_sift_context_t *sctx, re_dfastate_t **sifted_sts,
+			   re_dfastate_t **limited_sts, Idx last_node,
+			   Idx last_str_idx);
+static reg_errcode_t re_search_internal (const regex_t *preg,
+					 const char *string, Idx length,
+					 Idx start, Idx last_start, Idx stop,
+					 size_t nmatch, regmatch_t pmatch[],
+					 int eflags);
+static regoff_t re_search_2_stub (struct re_pattern_buffer *bufp,
+				  const char *string1, Idx length1,
+				  const char *string2, Idx length2,
+				  Idx start, regoff_t range,
+				  struct re_registers *regs,
+				  Idx stop, bool ret_len);
+static regoff_t re_search_stub (struct re_pattern_buffer *bufp,
+				const char *string, Idx length, Idx start,
+				regoff_t range, Idx stop,
+				struct re_registers *regs,
+				bool ret_len);
+static unsigned re_copy_regs (struct re_registers *regs, regmatch_t *pmatch,
+                              Idx nregs, int regs_allocated);
+static reg_errcode_t prune_impossible_nodes (re_match_context_t *mctx);
+static Idx check_matching (re_match_context_t *mctx, bool fl_longest_match,
+			   Idx *p_match_first);
+static Idx check_halt_state_context (const re_match_context_t *mctx,
+				     const re_dfastate_t *state, Idx idx);
+static void update_regs (const re_dfa_t *dfa, regmatch_t *pmatch,
+			 regmatch_t *prev_idx_match, Idx cur_node,
+			 Idx cur_idx, Idx nmatch);
+static reg_errcode_t push_fail_stack (struct re_fail_stack_t *fs,
+				      Idx str_idx, Idx dest_node, Idx nregs,
+				      regmatch_t *regs, regmatch_t *prevregs,
+				      re_node_set *eps_via_nodes);
+static reg_errcode_t set_regs (const regex_t *preg,
+			       const re_match_context_t *mctx,
+			       size_t nmatch, regmatch_t *pmatch,
+			       bool fl_backtrack);
+static reg_errcode_t free_fail_stack_return (struct re_fail_stack_t *fs);
+
+#ifdef RE_ENABLE_I18N
+static int sift_states_iter_mb (const re_match_context_t *mctx,
+				re_sift_context_t *sctx,
+				Idx node_idx, Idx str_idx, Idx max_str_idx);
+#endif /* RE_ENABLE_I18N */
+static reg_errcode_t sift_states_backward (const re_match_context_t *mctx,
+					   re_sift_context_t *sctx);
+static reg_errcode_t build_sifted_states (const re_match_context_t *mctx,
+					  re_sift_context_t *sctx, Idx str_idx,
+					  re_node_set *cur_dest);
+static reg_errcode_t update_cur_sifted_state (const re_match_context_t *mctx,
+					      re_sift_context_t *sctx,
+					      Idx str_idx,
+					      re_node_set *dest_nodes);
+static reg_errcode_t add_epsilon_src_nodes (const re_dfa_t *dfa,
+					    re_node_set *dest_nodes,
+					    const re_node_set *candidates);
+static bool check_dst_limits (const re_match_context_t *mctx,
+			      const re_node_set *limits,
+			      Idx dst_node, Idx dst_idx, Idx src_node,
+			      Idx src_idx);
+static int check_dst_limits_calc_pos_1 (const re_match_context_t *mctx,
+					int boundaries, Idx subexp_idx,
+					Idx from_node, Idx bkref_idx);
+static int check_dst_limits_calc_pos (const re_match_context_t *mctx,
+				      Idx limit, Idx subexp_idx,
+				      Idx node, Idx str_idx,
+				      Idx bkref_idx);
+static reg_errcode_t check_subexp_limits (const re_dfa_t *dfa,
+					  re_node_set *dest_nodes,
+					  const re_node_set *candidates,
+					  re_node_set *limits,
+					  struct re_backref_cache_entry *bkref_ents,
+					  Idx str_idx);
+static reg_errcode_t sift_states_bkref (const re_match_context_t *mctx,
+					re_sift_context_t *sctx,
+					Idx str_idx, const re_node_set *candidates);
+static reg_errcode_t merge_state_array (const re_dfa_t *dfa,
+					re_dfastate_t **dst,
+					re_dfastate_t **src, Idx num);
+static re_dfastate_t *find_recover_state (reg_errcode_t *err,
+					 re_match_context_t *mctx);
+static re_dfastate_t *transit_state (reg_errcode_t *err,
+				     re_match_context_t *mctx,
+				     re_dfastate_t *state);
+static re_dfastate_t *merge_state_with_log (reg_errcode_t *err,
+					    re_match_context_t *mctx,
+					    re_dfastate_t *next_state);
+static reg_errcode_t check_subexp_matching_top (re_match_context_t *mctx,
+						re_node_set *cur_nodes,
+						Idx str_idx);
+#if 0
+static re_dfastate_t *transit_state_sb (reg_errcode_t *err,
+					re_match_context_t *mctx,
+					re_dfastate_t *pstate);
+#endif
+#ifdef RE_ENABLE_I18N
+static reg_errcode_t transit_state_mb (re_match_context_t *mctx,
+				       re_dfastate_t *pstate);
+#endif /* RE_ENABLE_I18N */
+static reg_errcode_t transit_state_bkref (re_match_context_t *mctx,
+					  const re_node_set *nodes);
+static reg_errcode_t get_subexp (re_match_context_t *mctx,
+				 Idx bkref_node, Idx bkref_str_idx);
+static reg_errcode_t get_subexp_sub (re_match_context_t *mctx,
+				     const re_sub_match_top_t *sub_top,
+				     re_sub_match_last_t *sub_last,
+				     Idx bkref_node, Idx bkref_str);
+static Idx find_subexp_node (const re_dfa_t *dfa, const re_node_set *nodes,
+			     Idx subexp_idx, int type);
+static reg_errcode_t check_arrival (re_match_context_t *mctx,
+				    state_array_t *path, Idx top_node,
+				    Idx top_str, Idx last_node, Idx last_str,
+				    int type);
+static reg_errcode_t check_arrival_add_next_nodes (re_match_context_t *mctx,
+						   Idx str_idx,
+						   re_node_set *cur_nodes,
+						   re_node_set *next_nodes);
+static reg_errcode_t check_arrival_expand_ecl (const re_dfa_t *dfa,
+					       re_node_set *cur_nodes,
+					       Idx ex_subexp, int type);
+static reg_errcode_t check_arrival_expand_ecl_sub (const re_dfa_t *dfa,
+						   re_node_set *dst_nodes,
+						   Idx target, Idx ex_subexp,
+						   int type);
+static reg_errcode_t expand_bkref_cache (re_match_context_t *mctx,
+					 re_node_set *cur_nodes, Idx cur_str,
+					 Idx subexp_num, int type);
+static bool build_trtable (const re_dfa_t *dfa, re_dfastate_t *state);
+#ifdef RE_ENABLE_I18N
+static int check_node_accept_bytes (const re_dfa_t *dfa, Idx node_idx,
+				    const re_string_t *input, Idx idx);
+# ifdef _LIBC
+static unsigned int find_collation_sequence_value (const unsigned char *mbs,
+						   size_t name_len);
+# endif /* _LIBC */
+#endif /* RE_ENABLE_I18N */
+static Idx group_nodes_into_DFAstates (const re_dfa_t *dfa,
+				       const re_dfastate_t *state,
+				       re_node_set *states_node,
+				       bitset_t *states_ch);
+static bool check_node_accept (const re_match_context_t *mctx,
+			       const re_token_t *node, Idx idx);
+static reg_errcode_t extend_buffers (re_match_context_t *mctx, int min_len);
+
+/* Entry point for POSIX code.  */
+
+/* regexec searches for a given pattern, specified by PREG, in the
+   string STRING.
+
+   If NMATCH is zero or REG_NOSUB was set in the cflags argument to
+   'regcomp', we ignore PMATCH.  Otherwise, we assume PMATCH has at
+   least NMATCH elements, and we set them to the offsets of the
+   corresponding matched substrings.
+
+   EFLAGS specifies "execution flags" which affect matching: if
+   REG_NOTBOL is set, then ^ does not match at the beginning of the
+   string; if REG_NOTEOL is set, then $ does not match at the end.
+
+   Return 0 if a match is found, REG_NOMATCH if not, REG_BADPAT if
+   EFLAGS is invalid.  */
+
+int
+regexec (const regex_t *__restrict preg, const char *__restrict string,
+	 size_t nmatch, regmatch_t pmatch[], int eflags)
+{
+  reg_errcode_t err;
+  Idx start, length;
+  re_dfa_t *dfa = preg->buffer;
+
+  if (eflags & ~(REG_NOTBOL | REG_NOTEOL | REG_STARTEND))
+    return REG_BADPAT;
+
+  if (eflags & REG_STARTEND)
+    {
+      start = pmatch[0].rm_so;
+      length = pmatch[0].rm_eo;
+    }
+  else
+    {
+      start = 0;
+      length = strlen (string);
+    }
+
+  lock_lock (dfa->lock);
+  if (preg->no_sub)
+    err = re_search_internal (preg, string, length, start, length,
+			      length, 0, NULL, eflags);
+  else
+    err = re_search_internal (preg, string, length, start, length,
+			      length, nmatch, pmatch, eflags);
+  lock_unlock (dfa->lock);
+  return err != REG_NOERROR;
+}
+
+#ifdef _LIBC
+libc_hidden_def (__regexec)
+
+# include <shlib-compat.h>
+versioned_symbol (libc, __regexec, regexec, GLIBC_2_3_4);
+
+# if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3_4)
+__typeof__ (__regexec) __compat_regexec;
+
+int
+attribute_compat_text_section
+__compat_regexec (const regex_t *__restrict preg,
+		  const char *__restrict string, size_t nmatch,
+		  regmatch_t pmatch[], int eflags)
+{
+  return regexec (preg, string, nmatch, pmatch,
+		  eflags & (REG_NOTBOL | REG_NOTEOL));
+}
+compat_symbol (libc, __compat_regexec, regexec, GLIBC_2_0);
+# endif
+#endif
+
+/* Entry points for GNU code.  */
+
+/* re_match, re_search, re_match_2, re_search_2
+
+   The former two functions operate on STRING with length LENGTH,
+   while the later two operate on concatenation of STRING1 and STRING2
+   with lengths LENGTH1 and LENGTH2, respectively.
+
+   re_match() matches the compiled pattern in BUFP against the string,
+   starting at index START.
+
+   re_search() first tries matching at index START, then it tries to match
+   starting from index START + 1, and so on.  The last start position tried
+   is START + RANGE.  (Thus RANGE = 0 forces re_search to operate the same
+   way as re_match().)
+
+   The parameter STOP of re_{match,search}_2 specifies that no match exceeding
+   the first STOP characters of the concatenation of the strings should be
+   concerned.
+
+   If REGS is not NULL, and BUFP->no_sub is not set, the offsets of the match
+   and all groups is stored in REGS.  (For the "_2" variants, the offsets are
+   computed relative to the concatenation, not relative to the individual
+   strings.)
+
+   On success, re_match* functions return the length of the match, re_search*
+   return the position of the start of the match.  They return -1 on
+   match failure, -2 on error.  */
+
+regoff_t
+re_match (struct re_pattern_buffer *bufp, const char *string, Idx length,
+	  Idx start, struct re_registers *regs)
+{
+  return re_search_stub (bufp, string, length, start, 0, length, regs, true);
+}
+#ifdef _LIBC
+weak_alias (__re_match, re_match)
+#endif
+
+regoff_t
+re_search (struct re_pattern_buffer *bufp, const char *string, Idx length,
+	   Idx start, regoff_t range, struct re_registers *regs)
+{
+  return re_search_stub (bufp, string, length, start, range, length, regs,
+			 false);
+}
+#ifdef _LIBC
+weak_alias (__re_search, re_search)
+#endif
+
+regoff_t
+re_match_2 (struct re_pattern_buffer *bufp, const char *string1, Idx length1,
+	    const char *string2, Idx length2, Idx start,
+	    struct re_registers *regs, Idx stop)
+{
+  return re_search_2_stub (bufp, string1, length1, string2, length2,
+			   start, 0, regs, stop, true);
+}
+#ifdef _LIBC
+weak_alias (__re_match_2, re_match_2)
+#endif
+
+regoff_t
+re_search_2 (struct re_pattern_buffer *bufp, const char *string1, Idx length1,
+	     const char *string2, Idx length2, Idx start, regoff_t range,
+	     struct re_registers *regs, Idx stop)
+{
+  return re_search_2_stub (bufp, string1, length1, string2, length2,
+			   start, range, regs, stop, false);
+}
+#ifdef _LIBC
+weak_alias (__re_search_2, re_search_2)
+#endif
+
+static regoff_t
+re_search_2_stub (struct re_pattern_buffer *bufp, const char *string1,
+		  Idx length1, const char *string2, Idx length2, Idx start,
+		  regoff_t range, struct re_registers *regs,
+		  Idx stop, bool ret_len)
+{
+  const char *str;
+  regoff_t rval;
+  Idx len;
+  char *s = NULL;
+
+  if (__glibc_unlikely ((length1 < 0 || length2 < 0 || stop < 0
+			 || INT_ADD_WRAPV (length1, length2, &len))))
+    return -2;
+
+  /* Concatenate the strings.  */
+  if (length2 > 0)
+    if (length1 > 0)
+      {
+	s = re_malloc (char, len);
+
+	if (__glibc_unlikely (s == NULL))
+	  return -2;
+#ifdef _LIBC
+	memcpy (__mempcpy (s, string1, length1), string2, length2);
+#else
+	memcpy (s, string1, length1);
+	memcpy (s + length1, string2, length2);
+#endif
+	str = s;
+      }
+    else
+      str = string2;
+  else
+    str = string1;
+
+  rval = re_search_stub (bufp, str, len, start, range, stop, regs,
+			 ret_len);
+  re_free (s);
+  return rval;
+}
+
+/* The parameters have the same meaning as those of re_search.
+   Additional parameters:
+   If RET_LEN is true the length of the match is returned (re_match style);
+   otherwise the position of the match is returned.  */
+
+static regoff_t
+re_search_stub (struct re_pattern_buffer *bufp, const char *string, Idx length,
+		Idx start, regoff_t range, Idx stop, struct re_registers *regs,
+		bool ret_len)
+{
+  reg_errcode_t result;
+  regmatch_t *pmatch;
+  Idx nregs;
+  regoff_t rval;
+  int eflags = 0;
+  re_dfa_t *dfa = bufp->buffer;
+  Idx last_start = start + range;
+
+  /* Check for out-of-range.  */
+  if (__glibc_unlikely (start < 0 || start > length))
+    return -1;
+  if (__glibc_unlikely (length < last_start
+			|| (0 <= range && last_start < start)))
+    last_start = length;
+  else if (__glibc_unlikely (last_start < 0
+			     || (range < 0 && start <= last_start)))
+    last_start = 0;
+
+  lock_lock (dfa->lock);
+
+  eflags |= (bufp->not_bol) ? REG_NOTBOL : 0;
+  eflags |= (bufp->not_eol) ? REG_NOTEOL : 0;
+
+  /* Compile fastmap if we haven't yet.  */
+  if (start < last_start && bufp->fastmap != NULL && !bufp->fastmap_accurate)
+    re_compile_fastmap (bufp);
+
+  if (__glibc_unlikely (bufp->no_sub))
+    regs = NULL;
+
+  /* We need at least 1 register.  */
+  if (regs == NULL)
+    nregs = 1;
+  else if (__glibc_unlikely (bufp->regs_allocated == REGS_FIXED
+			     && regs->num_regs <= bufp->re_nsub))
+    {
+      nregs = regs->num_regs;
+      if (__glibc_unlikely (nregs < 1))
+	{
+	  /* Nothing can be copied to regs.  */
+	  regs = NULL;
+	  nregs = 1;
+	}
+    }
+  else
+    nregs = bufp->re_nsub + 1;
+  pmatch = re_malloc (regmatch_t, nregs);
+  if (__glibc_unlikely (pmatch == NULL))
+    {
+      rval = -2;
+      goto out;
+    }
+
+  result = re_search_internal (bufp, string, length, start, last_start, stop,
+			       nregs, pmatch, eflags);
+
+  rval = 0;
+
+  /* I hope we needn't fill their regs with -1's when no match was found.  */
+  if (result != REG_NOERROR)
+    rval = result == REG_NOMATCH ? -1 : -2;
+  else if (regs != NULL)
+    {
+      /* If caller wants register contents data back, copy them.  */
+      bufp->regs_allocated = re_copy_regs (regs, pmatch, nregs,
+					   bufp->regs_allocated);
+      if (__glibc_unlikely (bufp->regs_allocated == REGS_UNALLOCATED))
+	rval = -2;
+    }
+
+  if (__glibc_likely (rval == 0))
+    {
+      if (ret_len)
+	{
+	  DEBUG_ASSERT (pmatch[0].rm_so == start);
+	  rval = pmatch[0].rm_eo - start;
+	}
+      else
+	rval = pmatch[0].rm_so;
+    }
+  re_free (pmatch);
+ out:
+  lock_unlock (dfa->lock);
+  return rval;
+}
+
+static unsigned
+re_copy_regs (struct re_registers *regs, regmatch_t *pmatch, Idx nregs,
+	      int regs_allocated)
+{
+  int rval = REGS_REALLOCATE;
+  Idx i;
+  Idx need_regs = nregs + 1;
+  /* We need one extra element beyond 'num_regs' for the '-1' marker GNU code
+     uses.  */
+
+  /* Have the register data arrays been allocated?  */
+  if (regs_allocated == REGS_UNALLOCATED)
+    { /* No.  So allocate them with malloc.  */
+      regs->start = re_malloc (regoff_t, need_regs);
+      if (__glibc_unlikely (regs->start == NULL))
+	return REGS_UNALLOCATED;
+      regs->end = re_malloc (regoff_t, need_regs);
+      if (__glibc_unlikely (regs->end == NULL))
+	{
+	  re_free (regs->start);
+	  return REGS_UNALLOCATED;
+	}
+      regs->num_regs = need_regs;
+    }
+  else if (regs_allocated == REGS_REALLOCATE)
+    { /* Yes.  If we need more elements than were already
+	 allocated, reallocate them.  If we need fewer, just
+	 leave it alone.  */
+      if (__glibc_unlikely (need_regs > regs->num_regs))
+	{
+	  regoff_t *new_start = re_realloc (regs->start, regoff_t, need_regs);
+	  regoff_t *new_end;
+	  if (__glibc_unlikely (new_start == NULL))
+	    return REGS_UNALLOCATED;
+	  new_end = re_realloc (regs->end, regoff_t, need_regs);
+	  if (__glibc_unlikely (new_end == NULL))
+	    {
+	      re_free (new_start);
+	      return REGS_UNALLOCATED;
+	    }
+	  regs->start = new_start;
+	  regs->end = new_end;
+	  regs->num_regs = need_regs;
+	}
+    }
+  else
+    {
+      DEBUG_ASSERT (regs_allocated == REGS_FIXED);
+      /* This function may not be called with REGS_FIXED and nregs too big.  */
+      DEBUG_ASSERT (nregs <= regs->num_regs);
+      rval = REGS_FIXED;
+    }
+
+  /* Copy the regs.  */
+  for (i = 0; i < nregs; ++i)
+    {
+      regs->start[i] = pmatch[i].rm_so;
+      regs->end[i] = pmatch[i].rm_eo;
+    }
+  for ( ; i < regs->num_regs; ++i)
+    regs->start[i] = regs->end[i] = -1;
+
+  return rval;
+}
+
+/* Set REGS to hold NUM_REGS registers, storing them in STARTS and
+   ENDS.  Subsequent matches using PATTERN_BUFFER and REGS will use
+   this memory for recording register information.  STARTS and ENDS
+   must be allocated using the malloc library routine, and must each
+   be at least NUM_REGS * sizeof (regoff_t) bytes long.
+
+   If NUM_REGS == 0, then subsequent matches should allocate their own
+   register data.
+
+   Unless this function is called, the first search or match using
+   PATTERN_BUFFER will allocate its own register data, without
+   freeing the old data.  */
+
+void
+re_set_registers (struct re_pattern_buffer *bufp, struct re_registers *regs,
+		  __re_size_t num_regs, regoff_t *starts, regoff_t *ends)
+{
+  if (num_regs)
+    {
+      bufp->regs_allocated = REGS_REALLOCATE;
+      regs->num_regs = num_regs;
+      regs->start = starts;
+      regs->end = ends;
+    }
+  else
+    {
+      bufp->regs_allocated = REGS_UNALLOCATED;
+      regs->num_regs = 0;
+      regs->start = regs->end = NULL;
+    }
+}
+#ifdef _LIBC
+weak_alias (__re_set_registers, re_set_registers)
+#endif
+
+/* Entry points compatible with 4.2 BSD regex library.  We don't define
+   them unless specifically requested.  */
+
+#if defined _REGEX_RE_COMP || defined _LIBC
+int
+# ifdef _LIBC
+weak_function
+# endif
+re_exec (const char *s)
+{
+  return 0 == regexec (&re_comp_buf, s, 0, NULL, 0);
+}
+#endif /* _REGEX_RE_COMP */
+
+/* Internal entry point.  */
+
+/* Searches for a compiled pattern PREG in the string STRING, whose
+   length is LENGTH.  NMATCH, PMATCH, and EFLAGS have the same
+   meaning as with regexec.  LAST_START is START + RANGE, where
+   START and RANGE have the same meaning as with re_search.
+   Return REG_NOERROR if we find a match, and REG_NOMATCH if not,
+   otherwise return the error code.
+   Note: We assume front end functions already check ranges.
+   (0 <= LAST_START && LAST_START <= LENGTH)  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+re_search_internal (const regex_t *preg, const char *string, Idx length,
+		    Idx start, Idx last_start, Idx stop, size_t nmatch,
+		    regmatch_t pmatch[], int eflags)
+{
+  reg_errcode_t err;
+  const re_dfa_t *dfa = preg->buffer;
+  Idx left_lim, right_lim;
+  int incr;
+  bool fl_longest_match;
+  int match_kind;
+  Idx match_first;
+  Idx match_last = -1;
+  Idx extra_nmatch;
+  bool sb;
+  int ch;
+  re_match_context_t mctx = { .dfa = dfa };
+  char *fastmap = ((preg->fastmap != NULL && preg->fastmap_accurate
+		    && start != last_start && !preg->can_be_null)
+		   ? preg->fastmap : NULL);
+  RE_TRANSLATE_TYPE t = preg->translate;
+
+  extra_nmatch = (nmatch > preg->re_nsub) ? nmatch - (preg->re_nsub + 1) : 0;
+  nmatch -= extra_nmatch;
+
+  /* Check if the DFA haven't been compiled.  */
+  if (__glibc_unlikely (preg->used == 0 || dfa->init_state == NULL
+			|| dfa->init_state_word == NULL
+			|| dfa->init_state_nl == NULL
+			|| dfa->init_state_begbuf == NULL))
+    return REG_NOMATCH;
+
+  /* We assume front-end functions already check them.  */
+  DEBUG_ASSERT (0 <= last_start && last_start <= length);
+
+  /* If initial states with non-begbuf contexts have no elements,
+     the regex must be anchored.  If preg->newline_anchor is set,
+     we'll never use init_state_nl, so do not check it.  */
+  if (dfa->init_state->nodes.nelem == 0
+      && dfa->init_state_word->nodes.nelem == 0
+      && (dfa->init_state_nl->nodes.nelem == 0
+	  || !preg->newline_anchor))
+    {
+      if (start != 0 && last_start != 0)
+        return REG_NOMATCH;
+      start = last_start = 0;
+    }
+
+  /* We must check the longest matching, if nmatch > 0.  */
+  fl_longest_match = (nmatch != 0 || dfa->nbackref);
+
+  err = re_string_allocate (&mctx.input, string, length, dfa->nodes_len + 1,
+			    preg->translate, (preg->syntax & RE_ICASE) != 0,
+			    dfa);
+  if (__glibc_unlikely (err != REG_NOERROR))
+    goto free_return;
+  mctx.input.stop = stop;
+  mctx.input.raw_stop = stop;
+  mctx.input.newline_anchor = preg->newline_anchor;
+
+  err = match_ctx_init (&mctx, eflags, dfa->nbackref * 2);
+  if (__glibc_unlikely (err != REG_NOERROR))
+    goto free_return;
+
+  /* We will log all the DFA states through which the dfa pass,
+     if nmatch > 1, or this dfa has "multibyte node", which is a
+     back-reference or a node which can accept multibyte character or
+     multi character collating element.  */
+  if (nmatch > 1 || dfa->has_mb_node)
+    {
+      /* Avoid overflow.  */
+      if (__glibc_unlikely ((MIN (IDX_MAX, SIZE_MAX / sizeof (re_dfastate_t *))
+			     <= mctx.input.bufs_len)))
+	{
+	  err = REG_ESPACE;
+	  goto free_return;
+	}
+
+      mctx.state_log = re_malloc (re_dfastate_t *, mctx.input.bufs_len + 1);
+      if (__glibc_unlikely (mctx.state_log == NULL))
+	{
+	  err = REG_ESPACE;
+	  goto free_return;
+	}
+    }
+
+  match_first = start;
+  mctx.input.tip_context = (eflags & REG_NOTBOL) ? CONTEXT_BEGBUF
+			   : CONTEXT_NEWLINE | CONTEXT_BEGBUF;
+
+  /* Check incrementally whether the input string matches.  */
+  incr = (last_start < start) ? -1 : 1;
+  left_lim = (last_start < start) ? last_start : start;
+  right_lim = (last_start < start) ? start : last_start;
+  sb = dfa->mb_cur_max == 1;
+  match_kind =
+    (fastmap
+     ? ((sb || !(preg->syntax & RE_ICASE || t) ? 4 : 0)
+	| (start <= last_start ? 2 : 0)
+	| (t != NULL ? 1 : 0))
+     : 8);
+
+  for (;; match_first += incr)
+    {
+      err = REG_NOMATCH;
+      if (match_first < left_lim || right_lim < match_first)
+	goto free_return;
+
+      /* Advance as rapidly as possible through the string, until we
+	 find a plausible place to start matching.  This may be done
+	 with varying efficiency, so there are various possibilities:
+	 only the most common of them are specialized, in order to
+	 save on code size.  We use a switch statement for speed.  */
+      switch (match_kind)
+	{
+	case 8:
+	  /* No fastmap.  */
+	  break;
+
+	case 7:
+	  /* Fastmap with single-byte translation, match forward.  */
+	  while (__glibc_likely (match_first < right_lim)
+		 && !fastmap[t[(unsigned char) string[match_first]]])
+	    ++match_first;
+	  goto forward_match_found_start_or_reached_end;
+
+	case 6:
+	  /* Fastmap without translation, match forward.  */
+	  while (__glibc_likely (match_first < right_lim)
+		 && !fastmap[(unsigned char) string[match_first]])
+	    ++match_first;
+
+	forward_match_found_start_or_reached_end:
+	  if (__glibc_unlikely (match_first == right_lim))
+	    {
+	      ch = match_first >= length
+		       ? 0 : (unsigned char) string[match_first];
+	      if (!fastmap[t ? t[ch] : ch])
+		goto free_return;
+	    }
+	  break;
+
+	case 4:
+	case 5:
+	  /* Fastmap without multi-byte translation, match backwards.  */
+	  while (match_first >= left_lim)
+	    {
+	      ch = match_first >= length
+		       ? 0 : (unsigned char) string[match_first];
+	      if (fastmap[t ? t[ch] : ch])
+		break;
+	      --match_first;
+	    }
+	  if (match_first < left_lim)
+	    goto free_return;
+	  break;
+
+	default:
+	  /* In this case, we can't determine easily the current byte,
+	     since it might be a component byte of a multibyte
+	     character.  Then we use the constructed buffer instead.  */
+	  for (;;)
+	    {
+	      /* If MATCH_FIRST is out of the valid range, reconstruct the
+		 buffers.  */
+	      __re_size_t offset = match_first - mctx.input.raw_mbs_idx;
+	      if (__glibc_unlikely (offset
+				    >= (__re_size_t) mctx.input.valid_raw_len))
+		{
+		  err = re_string_reconstruct (&mctx.input, match_first,
+					       eflags);
+		  if (__glibc_unlikely (err != REG_NOERROR))
+		    goto free_return;
+
+		  offset = match_first - mctx.input.raw_mbs_idx;
+		}
+	      /* If MATCH_FIRST is out of the buffer, leave it as '\0'.
+		 Note that MATCH_FIRST must not be smaller than 0.  */
+	      ch = (match_first >= length
+		    ? 0 : re_string_byte_at (&mctx.input, offset));
+	      if (fastmap[ch])
+		break;
+	      match_first += incr;
+	      if (match_first < left_lim || match_first > right_lim)
+		{
+		  err = REG_NOMATCH;
+		  goto free_return;
+		}
+	    }
+	  break;
+	}
+
+      /* Reconstruct the buffers so that the matcher can assume that
+	 the matching starts from the beginning of the buffer.  */
+      err = re_string_reconstruct (&mctx.input, match_first, eflags);
+      if (__glibc_unlikely (err != REG_NOERROR))
+	goto free_return;
+
+#ifdef RE_ENABLE_I18N
+     /* Don't consider this char as a possible match start if it part,
+	yet isn't the head, of a multibyte character.  */
+      if (!sb && !re_string_first_byte (&mctx.input, 0))
+	continue;
+#endif
+
+      /* It seems to be appropriate one, then use the matcher.  */
+      /* We assume that the matching starts from 0.  */
+      mctx.state_log_top = mctx.nbkref_ents = mctx.max_mb_elem_len = 0;
+      match_last = check_matching (&mctx, fl_longest_match,
+				   start <= last_start ? &match_first : NULL);
+      if (match_last != -1)
+	{
+	  if (__glibc_unlikely (match_last == -2))
+	    {
+	      err = REG_ESPACE;
+	      goto free_return;
+	    }
+	  else
+	    {
+	      mctx.match_last = match_last;
+	      if ((!preg->no_sub && nmatch > 1) || dfa->nbackref)
+		{
+		  re_dfastate_t *pstate = mctx.state_log[match_last];
+		  mctx.last_node = check_halt_state_context (&mctx, pstate,
+							     match_last);
+		}
+	      if ((!preg->no_sub && nmatch > 1 && dfa->has_plural_match)
+		  || dfa->nbackref)
+		{
+		  err = prune_impossible_nodes (&mctx);
+		  if (err == REG_NOERROR)
+		    break;
+		  if (__glibc_unlikely (err != REG_NOMATCH))
+		    goto free_return;
+		  match_last = -1;
+		}
+	      else
+		break; /* We found a match.  */
+	    }
+	}
+
+      match_ctx_clean (&mctx);
+    }
+
+  DEBUG_ASSERT (match_last != -1);
+  DEBUG_ASSERT (err == REG_NOERROR);
+
+  /* Set pmatch[] if we need.  */
+  if (nmatch > 0)
+    {
+      Idx reg_idx;
+
+      /* Initialize registers.  */
+      for (reg_idx = 1; reg_idx < nmatch; ++reg_idx)
+	pmatch[reg_idx].rm_so = pmatch[reg_idx].rm_eo = -1;
+
+      /* Set the points where matching start/end.  */
+      pmatch[0].rm_so = 0;
+      pmatch[0].rm_eo = mctx.match_last;
+      /* FIXME: This function should fail if mctx.match_last exceeds
+	 the maximum possible regoff_t value.  We need a new error
+	 code REG_OVERFLOW.  */
+
+      if (!preg->no_sub && nmatch > 1)
+	{
+	  err = set_regs (preg, &mctx, nmatch, pmatch,
+			  dfa->has_plural_match && dfa->nbackref > 0);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    goto free_return;
+	}
+
+      /* At last, add the offset to each register, since we slid
+	 the buffers so that we could assume that the matching starts
+	 from 0.  */
+      for (reg_idx = 0; reg_idx < nmatch; ++reg_idx)
+	if (pmatch[reg_idx].rm_so != -1)
+	  {
+#ifdef RE_ENABLE_I18N
+	    if (__glibc_unlikely (mctx.input.offsets_needed != 0))
+	      {
+		pmatch[reg_idx].rm_so =
+		  (pmatch[reg_idx].rm_so == mctx.input.valid_len
+		   ? mctx.input.valid_raw_len
+		   : mctx.input.offsets[pmatch[reg_idx].rm_so]);
+		pmatch[reg_idx].rm_eo =
+		  (pmatch[reg_idx].rm_eo == mctx.input.valid_len
+		   ? mctx.input.valid_raw_len
+		   : mctx.input.offsets[pmatch[reg_idx].rm_eo]);
+	      }
+#else
+	    DEBUG_ASSERT (mctx.input.offsets_needed == 0);
+#endif
+	    pmatch[reg_idx].rm_so += match_first;
+	    pmatch[reg_idx].rm_eo += match_first;
+	  }
+      for (reg_idx = 0; reg_idx < extra_nmatch; ++reg_idx)
+	{
+	  pmatch[nmatch + reg_idx].rm_so = -1;
+	  pmatch[nmatch + reg_idx].rm_eo = -1;
+	}
+
+      if (dfa->subexp_map)
+	for (reg_idx = 0; reg_idx + 1 < nmatch; reg_idx++)
+	  if (dfa->subexp_map[reg_idx] != reg_idx)
+	    {
+	      pmatch[reg_idx + 1].rm_so
+		= pmatch[dfa->subexp_map[reg_idx] + 1].rm_so;
+	      pmatch[reg_idx + 1].rm_eo
+		= pmatch[dfa->subexp_map[reg_idx] + 1].rm_eo;
+	    }
+    }
+
+ free_return:
+  re_free (mctx.state_log);
+  if (dfa->nbackref)
+    match_ctx_free (&mctx);
+  re_string_destruct (&mctx.input);
+  return err;
+}
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+prune_impossible_nodes (re_match_context_t *mctx)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  Idx halt_node, match_last;
+  reg_errcode_t ret;
+  re_dfastate_t **sifted_states;
+  re_dfastate_t **lim_states = NULL;
+  re_sift_context_t sctx;
+  DEBUG_ASSERT (mctx->state_log != NULL);
+  match_last = mctx->match_last;
+  halt_node = mctx->last_node;
+
+  /* Avoid overflow.  */
+  if (__glibc_unlikely (MIN (IDX_MAX, SIZE_MAX / sizeof (re_dfastate_t *))
+			<= match_last))
+    return REG_ESPACE;
+
+  sifted_states = re_malloc (re_dfastate_t *, match_last + 1);
+  if (__glibc_unlikely (sifted_states == NULL))
+    {
+      ret = REG_ESPACE;
+      goto free_return;
+    }
+  if (dfa->nbackref)
+    {
+      lim_states = re_malloc (re_dfastate_t *, match_last + 1);
+      if (__glibc_unlikely (lim_states == NULL))
+	{
+	  ret = REG_ESPACE;
+	  goto free_return;
+	}
+      while (1)
+	{
+	  memset (lim_states, '\0',
+		  sizeof (re_dfastate_t *) * (match_last + 1));
+	  sift_ctx_init (&sctx, sifted_states, lim_states, halt_node,
+			 match_last);
+	  ret = sift_states_backward (mctx, &sctx);
+	  re_node_set_free (&sctx.limits);
+	  if (__glibc_unlikely (ret != REG_NOERROR))
+	      goto free_return;
+	  if (sifted_states[0] != NULL || lim_states[0] != NULL)
+	    break;
+	  do
+	    {
+	      --match_last;
+	      if (match_last < 0)
+		{
+		  ret = REG_NOMATCH;
+		  goto free_return;
+		}
+	    } while (mctx->state_log[match_last] == NULL
+		     || !mctx->state_log[match_last]->halt);
+	  halt_node = check_halt_state_context (mctx,
+						mctx->state_log[match_last],
+						match_last);
+	}
+      ret = merge_state_array (dfa, sifted_states, lim_states,
+			       match_last + 1);
+      re_free (lim_states);
+      lim_states = NULL;
+      if (__glibc_unlikely (ret != REG_NOERROR))
+	goto free_return;
+    }
+  else
+    {
+      sift_ctx_init (&sctx, sifted_states, lim_states, halt_node, match_last);
+      ret = sift_states_backward (mctx, &sctx);
+      re_node_set_free (&sctx.limits);
+      if (__glibc_unlikely (ret != REG_NOERROR))
+	goto free_return;
+      if (sifted_states[0] == NULL)
+	{
+	  ret = REG_NOMATCH;
+	  goto free_return;
+	}
+    }
+  re_free (mctx->state_log);
+  mctx->state_log = sifted_states;
+  sifted_states = NULL;
+  mctx->last_node = halt_node;
+  mctx->match_last = match_last;
+  ret = REG_NOERROR;
+ free_return:
+  re_free (sifted_states);
+  re_free (lim_states);
+  return ret;
+}
+
+/* Acquire an initial state and return it.
+   We must select appropriate initial state depending on the context,
+   since initial states may have constraints like "\<", "^", etc..  */
+
+static inline re_dfastate_t *
+__attribute__ ((always_inline))
+acquire_init_state_context (reg_errcode_t *err, const re_match_context_t *mctx,
+			    Idx idx)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  if (dfa->init_state->has_constraint)
+    {
+      unsigned int context;
+      context = re_string_context_at (&mctx->input, idx - 1, mctx->eflags);
+      if (IS_WORD_CONTEXT (context))
+	return dfa->init_state_word;
+      else if (IS_ORDINARY_CONTEXT (context))
+	return dfa->init_state;
+      else if (IS_BEGBUF_CONTEXT (context) && IS_NEWLINE_CONTEXT (context))
+	return dfa->init_state_begbuf;
+      else if (IS_NEWLINE_CONTEXT (context))
+	return dfa->init_state_nl;
+      else if (IS_BEGBUF_CONTEXT (context))
+	{
+	  /* It is relatively rare case, then calculate on demand.  */
+	  return re_acquire_state_context (err, dfa,
+					   dfa->init_state->entrance_nodes,
+					   context);
+	}
+      else
+	/* Must not happen?  */
+	return dfa->init_state;
+    }
+  else
+    return dfa->init_state;
+}
+
+/* Check whether the regular expression match input string INPUT or not,
+   and return the index where the matching end.  Return -1 if
+   there is no match, and return -2 in case of an error.
+   FL_LONGEST_MATCH means we want the POSIX longest matching.
+   If P_MATCH_FIRST is not NULL, and the match fails, it is set to the
+   next place where we may want to try matching.
+   Note that the matcher assumes that the matching starts from the current
+   index of the buffer.  */
+
+static Idx
+__attribute_warn_unused_result__
+check_matching (re_match_context_t *mctx, bool fl_longest_match,
+		Idx *p_match_first)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  reg_errcode_t err;
+  Idx match = 0;
+  Idx match_last = -1;
+  Idx cur_str_idx = re_string_cur_idx (&mctx->input);
+  re_dfastate_t *cur_state;
+  bool at_init_state = p_match_first != NULL;
+  Idx next_start_idx = cur_str_idx;
+
+  err = REG_NOERROR;
+  cur_state = acquire_init_state_context (&err, mctx, cur_str_idx);
+  /* An initial state must not be NULL (invalid).  */
+  if (__glibc_unlikely (cur_state == NULL))
+    {
+      DEBUG_ASSERT (err == REG_ESPACE);
+      return -2;
+    }
+
+  if (mctx->state_log != NULL)
+    {
+      mctx->state_log[cur_str_idx] = cur_state;
+
+      /* Check OP_OPEN_SUBEXP in the initial state in case that we use them
+	 later.  E.g. Processing back references.  */
+      if (__glibc_unlikely (dfa->nbackref))
+	{
+	  at_init_state = false;
+	  err = check_subexp_matching_top (mctx, &cur_state->nodes, 0);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    return err;
+
+	  if (cur_state->has_backref)
+	    {
+	      err = transit_state_bkref (mctx, &cur_state->nodes);
+	      if (__glibc_unlikely (err != REG_NOERROR))
+		return err;
+	    }
+	}
+    }
+
+  /* If the RE accepts NULL string.  */
+  if (__glibc_unlikely (cur_state->halt))
+    {
+      if (!cur_state->has_constraint
+	  || check_halt_state_context (mctx, cur_state, cur_str_idx))
+	{
+	  if (!fl_longest_match)
+	    return cur_str_idx;
+	  else
+	    {
+	      match_last = cur_str_idx;
+	      match = 1;
+	    }
+	}
+    }
+
+  while (!re_string_eoi (&mctx->input))
+    {
+      re_dfastate_t *old_state = cur_state;
+      Idx next_char_idx = re_string_cur_idx (&mctx->input) + 1;
+
+      if ((__glibc_unlikely (next_char_idx >= mctx->input.bufs_len)
+	   && mctx->input.bufs_len < mctx->input.len)
+	  || (__glibc_unlikely (next_char_idx >= mctx->input.valid_len)
+	      && mctx->input.valid_len < mctx->input.len))
+	{
+	  err = extend_buffers (mctx, next_char_idx + 1);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    {
+	      DEBUG_ASSERT (err == REG_ESPACE);
+	      return -2;
+	    }
+	}
+
+      cur_state = transit_state (&err, mctx, cur_state);
+      if (mctx->state_log != NULL)
+	cur_state = merge_state_with_log (&err, mctx, cur_state);
+
+      if (cur_state == NULL)
+	{
+	  /* Reached the invalid state or an error.  Try to recover a valid
+	     state using the state log, if available and if we have not
+	     already found a valid (even if not the longest) match.  */
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    return -2;
+
+	  if (mctx->state_log == NULL
+	      || (match && !fl_longest_match)
+	      || (cur_state = find_recover_state (&err, mctx)) == NULL)
+	    break;
+	}
+
+      if (__glibc_unlikely (at_init_state))
+	{
+	  if (old_state == cur_state)
+	    next_start_idx = next_char_idx;
+	  else
+	    at_init_state = false;
+	}
+
+      if (cur_state->halt)
+	{
+	  /* Reached a halt state.
+	     Check the halt state can satisfy the current context.  */
+	  if (!cur_state->has_constraint
+	      || check_halt_state_context (mctx, cur_state,
+					   re_string_cur_idx (&mctx->input)))
+	    {
+	      /* We found an appropriate halt state.  */
+	      match_last = re_string_cur_idx (&mctx->input);
+	      match = 1;
+
+	      /* We found a match, do not modify match_first below.  */
+	      p_match_first = NULL;
+	      if (!fl_longest_match)
+		break;
+	    }
+	}
+    }
+
+  if (p_match_first)
+    *p_match_first += next_start_idx;
+
+  return match_last;
+}
+
+/* Check NODE match the current context.  */
+
+static bool
+check_halt_node_context (const re_dfa_t *dfa, Idx node, unsigned int context)
+{
+  re_token_type_t type = dfa->nodes[node].type;
+  unsigned int constraint = dfa->nodes[node].constraint;
+  if (type != END_OF_RE)
+    return false;
+  if (!constraint)
+    return true;
+  if (NOT_SATISFY_NEXT_CONSTRAINT (constraint, context))
+    return false;
+  return true;
+}
+
+/* Check the halt state STATE match the current context.
+   Return 0 if not match, if the node, STATE has, is a halt node and
+   match the context, return the node.  */
+
+static Idx
+check_halt_state_context (const re_match_context_t *mctx,
+			  const re_dfastate_t *state, Idx idx)
+{
+  Idx i;
+  unsigned int context;
+  DEBUG_ASSERT (state->halt);
+  context = re_string_context_at (&mctx->input, idx, mctx->eflags);
+  for (i = 0; i < state->nodes.nelem; ++i)
+    if (check_halt_node_context (mctx->dfa, state->nodes.elems[i], context))
+      return state->nodes.elems[i];
+  return 0;
+}
+
+/* Compute the next node to which "NFA" transit from NODE("NFA" is a NFA
+   corresponding to the DFA).
+   Return the destination node, and update EPS_VIA_NODES;
+   return -1 on match failure, -2 on error.  */
+
+static Idx
+proceed_next_node (const re_match_context_t *mctx, Idx nregs, regmatch_t *regs,
+		   regmatch_t *prevregs,
+		   Idx *pidx, Idx node, re_node_set *eps_via_nodes,
+		   struct re_fail_stack_t *fs)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  if (IS_EPSILON_NODE (dfa->nodes[node].type))
+    {
+      re_node_set *cur_nodes = &mctx->state_log[*pidx]->nodes;
+      re_node_set *edests = &dfa->edests[node];
+
+      if (! re_node_set_contains (eps_via_nodes, node))
+        {
+          bool ok = re_node_set_insert (eps_via_nodes, node);
+          if (__glibc_unlikely (! ok))
+            return -2;
+        }
+
+      /* Pick a valid destination, or return -1 if none is found.  */
+      Idx dest_node = -1;
+      for (Idx i = 0; i < edests->nelem; i++)
+	{
+	  Idx candidate = edests->elems[i];
+	  if (!re_node_set_contains (cur_nodes, candidate))
+	    continue;
+          if (dest_node == -1)
+	    dest_node = candidate;
+
+	  else
+	    {
+	      /* In order to avoid infinite loop like "(a*)*", return the second
+		 epsilon-transition if the first was already considered.  */
+	      if (re_node_set_contains (eps_via_nodes, dest_node))
+		return candidate;
+
+	      /* Otherwise, push the second epsilon-transition on the fail stack.  */
+	      else if (fs != NULL
+		       && push_fail_stack (fs, *pidx, candidate, nregs, regs,
+					   prevregs, eps_via_nodes))
+		return -2;
+
+	      /* We know we are going to exit.  */
+	      break;
+	    }
+	}
+      return dest_node;
+    }
+  else
+    {
+      Idx naccepted = 0;
+      re_token_type_t type = dfa->nodes[node].type;
+
+#ifdef RE_ENABLE_I18N
+      if (dfa->nodes[node].accept_mb)
+	naccepted = check_node_accept_bytes (dfa, node, &mctx->input, *pidx);
+      else
+#endif /* RE_ENABLE_I18N */
+      if (type == OP_BACK_REF)
+	{
+	  Idx subexp_idx = dfa->nodes[node].opr.idx + 1;
+	  if (subexp_idx < nregs)
+	    naccepted = regs[subexp_idx].rm_eo - regs[subexp_idx].rm_so;
+	  if (fs != NULL)
+	    {
+	      if (subexp_idx >= nregs
+		  || regs[subexp_idx].rm_so == -1
+		  || regs[subexp_idx].rm_eo == -1)
+		return -1;
+	      else if (naccepted)
+		{
+		  char *buf = (char *) re_string_get_buffer (&mctx->input);
+		  if (mctx->input.valid_len - *pidx < naccepted
+		      || (memcmp (buf + regs[subexp_idx].rm_so, buf + *pidx,
+				  naccepted)
+			  != 0))
+		    return -1;
+		}
+	    }
+
+	  if (naccepted == 0)
+	    {
+	      Idx dest_node;
+	      bool ok = re_node_set_insert (eps_via_nodes, node);
+	      if (__glibc_unlikely (! ok))
+		return -2;
+	      dest_node = dfa->edests[node].elems[0];
+	      if (re_node_set_contains (&mctx->state_log[*pidx]->nodes,
+					dest_node))
+		return dest_node;
+	    }
+	}
+
+      if (naccepted != 0
+	  || check_node_accept (mctx, dfa->nodes + node, *pidx))
+	{
+	  Idx dest_node = dfa->nexts[node];
+	  *pidx = (naccepted == 0) ? *pidx + 1 : *pidx + naccepted;
+	  if (fs && (*pidx > mctx->match_last || mctx->state_log[*pidx] == NULL
+		     || !re_node_set_contains (&mctx->state_log[*pidx]->nodes,
+					       dest_node)))
+	    return -1;
+	  re_node_set_empty (eps_via_nodes);
+	  return dest_node;
+	}
+    }
+  return -1;
+}
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+push_fail_stack (struct re_fail_stack_t *fs, Idx str_idx, Idx dest_node,
+		 Idx nregs, regmatch_t *regs, regmatch_t *prevregs,
+		 re_node_set *eps_via_nodes)
+{
+  reg_errcode_t err;
+  Idx num = fs->num++;
+  if (fs->num == fs->alloc)
+    {
+      struct re_fail_stack_ent_t *new_array;
+      new_array = re_realloc (fs->stack, struct re_fail_stack_ent_t,
+                              fs->alloc * 2);
+      if (new_array == NULL)
+	return REG_ESPACE;
+      fs->alloc *= 2;
+      fs->stack = new_array;
+    }
+  fs->stack[num].idx = str_idx;
+  fs->stack[num].node = dest_node;
+  fs->stack[num].regs = re_malloc (regmatch_t, 2 * nregs);
+  if (fs->stack[num].regs == NULL)
+    return REG_ESPACE;
+  memcpy (fs->stack[num].regs, regs, sizeof (regmatch_t) * nregs);
+  memcpy (fs->stack[num].regs + nregs, prevregs, sizeof (regmatch_t) * nregs);
+  err = re_node_set_init_copy (&fs->stack[num].eps_via_nodes, eps_via_nodes);
+  return err;
+}
+
+static Idx
+pop_fail_stack (struct re_fail_stack_t *fs, Idx *pidx, Idx nregs,
+		regmatch_t *regs, regmatch_t *prevregs,
+		re_node_set *eps_via_nodes)
+{
+  if (fs == NULL || fs->num == 0)
+    return -1;
+  Idx num = --fs->num;
+  *pidx = fs->stack[num].idx;
+  memcpy (regs, fs->stack[num].regs, sizeof (regmatch_t) * nregs);
+  memcpy (prevregs, fs->stack[num].regs + nregs, sizeof (regmatch_t) * nregs);
+  re_node_set_free (eps_via_nodes);
+  re_free (fs->stack[num].regs);
+  *eps_via_nodes = fs->stack[num].eps_via_nodes;
+  DEBUG_ASSERT (0 <= fs->stack[num].node);
+  return fs->stack[num].node;
+}
+
+
+#define DYNARRAY_STRUCT  regmatch_list
+#define DYNARRAY_ELEMENT regmatch_t
+#define DYNARRAY_PREFIX  regmatch_list_
+#include <malloc/dynarray-skeleton.c>
+
+/* Set the positions where the subexpressions are starts/ends to registers
+   PMATCH.
+   Note: We assume that pmatch[0] is already set, and
+   pmatch[i].rm_so == pmatch[i].rm_eo == -1 for 0 < i < nmatch.  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+set_regs (const regex_t *preg, const re_match_context_t *mctx, size_t nmatch,
+	  regmatch_t *pmatch, bool fl_backtrack)
+{
+  const re_dfa_t *dfa = preg->buffer;
+  Idx idx, cur_node;
+  re_node_set eps_via_nodes;
+  struct re_fail_stack_t *fs;
+  struct re_fail_stack_t fs_body = { 0, 2, NULL };
+  struct regmatch_list prev_match;
+  regmatch_list_init (&prev_match);
+
+  DEBUG_ASSERT (nmatch > 1);
+  DEBUG_ASSERT (mctx->state_log != NULL);
+  if (fl_backtrack)
+    {
+      fs = &fs_body;
+      fs->stack = re_malloc (struct re_fail_stack_ent_t, fs->alloc);
+      if (fs->stack == NULL)
+	return REG_ESPACE;
+    }
+  else
+    fs = NULL;
+
+  cur_node = dfa->init_node;
+  re_node_set_init_empty (&eps_via_nodes);
+
+  if (!regmatch_list_resize (&prev_match, nmatch))
+    {
+      regmatch_list_free (&prev_match);
+      free_fail_stack_return (fs);
+      return REG_ESPACE;
+    }
+  regmatch_t *prev_idx_match = regmatch_list_begin (&prev_match);
+  memcpy (prev_idx_match, pmatch, sizeof (regmatch_t) * nmatch);
+
+  for (idx = pmatch[0].rm_so; idx <= pmatch[0].rm_eo ;)
+    {
+      update_regs (dfa, pmatch, prev_idx_match, cur_node, idx, nmatch);
+
+      if ((idx == pmatch[0].rm_eo && cur_node == mctx->last_node)
+	  || (fs && re_node_set_contains (&eps_via_nodes, cur_node)))
+	{
+	  Idx reg_idx;
+	  cur_node = -1;
+	  if (fs)
+	    {
+	      for (reg_idx = 0; reg_idx < nmatch; ++reg_idx)
+		if (pmatch[reg_idx].rm_so > -1 && pmatch[reg_idx].rm_eo == -1)
+		  {
+		    cur_node = pop_fail_stack (fs, &idx, nmatch, pmatch,
+					       prev_idx_match, &eps_via_nodes);
+		    break;
+		  }
+	    }
+	  if (cur_node < 0)
+	    {
+	      re_node_set_free (&eps_via_nodes);
+	      regmatch_list_free (&prev_match);
+	      return free_fail_stack_return (fs);
+	    }
+	}
+
+      /* Proceed to next node.  */
+      cur_node = proceed_next_node (mctx, nmatch, pmatch, prev_idx_match,
+				    &idx, cur_node,
+				    &eps_via_nodes, fs);
+
+      if (__glibc_unlikely (cur_node < 0))
+	{
+	  if (__glibc_unlikely (cur_node == -2))
+	    {
+	      re_node_set_free (&eps_via_nodes);
+	      regmatch_list_free (&prev_match);
+	      free_fail_stack_return (fs);
+	      return REG_ESPACE;
+	    }
+	  cur_node = pop_fail_stack (fs, &idx, nmatch, pmatch,
+				     prev_idx_match, &eps_via_nodes);
+	  if (cur_node < 0)
+	    {
+	      re_node_set_free (&eps_via_nodes);
+	      regmatch_list_free (&prev_match);
+	      free_fail_stack_return (fs);
+	      return REG_NOMATCH;
+	    }
+	}
+    }
+  re_node_set_free (&eps_via_nodes);
+  regmatch_list_free (&prev_match);
+  return free_fail_stack_return (fs);
+}
+
+static reg_errcode_t
+free_fail_stack_return (struct re_fail_stack_t *fs)
+{
+  if (fs)
+    {
+      Idx fs_idx;
+      for (fs_idx = 0; fs_idx < fs->num; ++fs_idx)
+	{
+	  re_node_set_free (&fs->stack[fs_idx].eps_via_nodes);
+	  re_free (fs->stack[fs_idx].regs);
+	}
+      re_free (fs->stack);
+    }
+  return REG_NOERROR;
+}
+
+static void
+update_regs (const re_dfa_t *dfa, regmatch_t *pmatch,
+	     regmatch_t *prev_idx_match, Idx cur_node, Idx cur_idx, Idx nmatch)
+{
+  int type = dfa->nodes[cur_node].type;
+  if (type == OP_OPEN_SUBEXP)
+    {
+      Idx reg_num = dfa->nodes[cur_node].opr.idx + 1;
+
+      /* We are at the first node of this sub expression.  */
+      if (reg_num < nmatch)
+	{
+	  pmatch[reg_num].rm_so = cur_idx;
+	  pmatch[reg_num].rm_eo = -1;
+	}
+    }
+  else if (type == OP_CLOSE_SUBEXP)
+    {
+      /* We are at the last node of this sub expression.  */
+      Idx reg_num = dfa->nodes[cur_node].opr.idx + 1;
+      if (reg_num < nmatch)
+	{
+	  if (pmatch[reg_num].rm_so < cur_idx)
+	    {
+	      pmatch[reg_num].rm_eo = cur_idx;
+	      /* This is a non-empty match or we are not inside an optional
+		 subexpression.  Accept this right away.  */
+	      memcpy (prev_idx_match, pmatch, sizeof (regmatch_t) * nmatch);
+	    }
+	  else
+	    {
+	      if (dfa->nodes[cur_node].opt_subexp
+		  && prev_idx_match[reg_num].rm_so != -1)
+		/* We transited through an empty match for an optional
+		   subexpression, like (a?)*, and this is not the subexp's
+		   first match.  Copy back the old content of the registers
+		   so that matches of an inner subexpression are undone as
+		   well, like in ((a?))*.  */
+		memcpy (pmatch, prev_idx_match, sizeof (regmatch_t) * nmatch);
+	      else
+		/* We completed a subexpression, but it may be part of
+		   an optional one, so do not update PREV_IDX_MATCH.  */
+		pmatch[reg_num].rm_eo = cur_idx;
+	    }
+	}
+    }
+}
+
+/* This function checks the STATE_LOG from the SCTX->last_str_idx to 0
+   and sift the nodes in each states according to the following rules.
+   Updated state_log will be wrote to STATE_LOG.
+
+   Rules: We throw away the Node 'a' in the STATE_LOG[STR_IDX] if...
+     1. When STR_IDX == MATCH_LAST(the last index in the state_log):
+	If 'a' isn't the LAST_NODE and 'a' can't epsilon transit to
+	the LAST_NODE, we throw away the node 'a'.
+     2. When 0 <= STR_IDX < MATCH_LAST and 'a' accepts
+	string 's' and transit to 'b':
+	i. If 'b' isn't in the STATE_LOG[STR_IDX+strlen('s')], we throw
+	   away the node 'a'.
+	ii. If 'b' is in the STATE_LOG[STR_IDX+strlen('s')] but 'b' is
+	    thrown away, we throw away the node 'a'.
+     3. When 0 <= STR_IDX < MATCH_LAST and 'a' epsilon transit to 'b':
+	i. If 'b' isn't in the STATE_LOG[STR_IDX], we throw away the
+	   node 'a'.
+	ii. If 'b' is in the STATE_LOG[STR_IDX] but 'b' is thrown away,
+	    we throw away the node 'a'.  */
+
+#define STATE_NODE_CONTAINS(state,node) \
+  ((state) != NULL && re_node_set_contains (&(state)->nodes, node))
+
+static reg_errcode_t
+sift_states_backward (const re_match_context_t *mctx, re_sift_context_t *sctx)
+{
+  reg_errcode_t err;
+  int null_cnt = 0;
+  Idx str_idx = sctx->last_str_idx;
+  re_node_set cur_dest;
+
+  DEBUG_ASSERT (mctx->state_log != NULL && mctx->state_log[str_idx] != NULL);
+
+  /* Build sifted state_log[str_idx].  It has the nodes which can epsilon
+     transit to the last_node and the last_node itself.  */
+  err = re_node_set_init_1 (&cur_dest, sctx->last_node);
+  if (__glibc_unlikely (err != REG_NOERROR))
+    return err;
+  err = update_cur_sifted_state (mctx, sctx, str_idx, &cur_dest);
+  if (__glibc_unlikely (err != REG_NOERROR))
+    goto free_return;
+
+  /* Then check each states in the state_log.  */
+  while (str_idx > 0)
+    {
+      /* Update counters.  */
+      null_cnt = (sctx->sifted_states[str_idx] == NULL) ? null_cnt + 1 : 0;
+      if (null_cnt > mctx->max_mb_elem_len)
+	{
+	  memset (sctx->sifted_states, '\0',
+		  sizeof (re_dfastate_t *) * str_idx);
+	  re_node_set_free (&cur_dest);
+	  return REG_NOERROR;
+	}
+      re_node_set_empty (&cur_dest);
+      --str_idx;
+
+      if (mctx->state_log[str_idx])
+	{
+	  err = build_sifted_states (mctx, sctx, str_idx, &cur_dest);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    goto free_return;
+	}
+
+      /* Add all the nodes which satisfy the following conditions:
+	 - It can epsilon transit to a node in CUR_DEST.
+	 - It is in CUR_SRC.
+	 And update state_log.  */
+      err = update_cur_sifted_state (mctx, sctx, str_idx, &cur_dest);
+      if (__glibc_unlikely (err != REG_NOERROR))
+	goto free_return;
+    }
+  err = REG_NOERROR;
+ free_return:
+  re_node_set_free (&cur_dest);
+  return err;
+}
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+build_sifted_states (const re_match_context_t *mctx, re_sift_context_t *sctx,
+		     Idx str_idx, re_node_set *cur_dest)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  const re_node_set *cur_src = &mctx->state_log[str_idx]->non_eps_nodes;
+  Idx i;
+
+  /* Then build the next sifted state.
+     We build the next sifted state on 'cur_dest', and update
+     'sifted_states[str_idx]' with 'cur_dest'.
+     Note:
+     'cur_dest' is the sifted state from 'state_log[str_idx + 1]'.
+     'cur_src' points the node_set of the old 'state_log[str_idx]'
+     (with the epsilon nodes pre-filtered out).  */
+  for (i = 0; i < cur_src->nelem; i++)
+    {
+      Idx prev_node = cur_src->elems[i];
+      int naccepted = 0;
+      bool ok;
+      DEBUG_ASSERT (!IS_EPSILON_NODE (dfa->nodes[prev_node].type));
+
+#ifdef RE_ENABLE_I18N
+      /* If the node may accept "multi byte".  */
+      if (dfa->nodes[prev_node].accept_mb)
+	naccepted = sift_states_iter_mb (mctx, sctx, prev_node,
+					 str_idx, sctx->last_str_idx);
+#endif /* RE_ENABLE_I18N */
+
+      /* We don't check backreferences here.
+	 See update_cur_sifted_state().  */
+      if (!naccepted
+	  && check_node_accept (mctx, dfa->nodes + prev_node, str_idx)
+	  && STATE_NODE_CONTAINS (sctx->sifted_states[str_idx + 1],
+				  dfa->nexts[prev_node]))
+	naccepted = 1;
+
+      if (naccepted == 0)
+	continue;
+
+      if (sctx->limits.nelem)
+	{
+	  Idx to_idx = str_idx + naccepted;
+	  if (check_dst_limits (mctx, &sctx->limits,
+				dfa->nexts[prev_node], to_idx,
+				prev_node, str_idx))
+	    continue;
+	}
+      ok = re_node_set_insert (cur_dest, prev_node);
+      if (__glibc_unlikely (! ok))
+	return REG_ESPACE;
+    }
+
+  return REG_NOERROR;
+}
+
+/* Helper functions.  */
+
+static reg_errcode_t
+clean_state_log_if_needed (re_match_context_t *mctx, Idx next_state_log_idx)
+{
+  Idx top = mctx->state_log_top;
+
+  if ((next_state_log_idx >= mctx->input.bufs_len
+       && mctx->input.bufs_len < mctx->input.len)
+      || (next_state_log_idx >= mctx->input.valid_len
+	  && mctx->input.valid_len < mctx->input.len))
+    {
+      reg_errcode_t err;
+      err = extend_buffers (mctx, next_state_log_idx + 1);
+      if (__glibc_unlikely (err != REG_NOERROR))
+	return err;
+    }
+
+  if (top < next_state_log_idx)
+    {
+      memset (mctx->state_log + top + 1, '\0',
+	      sizeof (re_dfastate_t *) * (next_state_log_idx - top));
+      mctx->state_log_top = next_state_log_idx;
+    }
+  return REG_NOERROR;
+}
+
+static reg_errcode_t
+merge_state_array (const re_dfa_t *dfa, re_dfastate_t **dst,
+		   re_dfastate_t **src, Idx num)
+{
+  Idx st_idx;
+  reg_errcode_t err;
+  for (st_idx = 0; st_idx < num; ++st_idx)
+    {
+      if (dst[st_idx] == NULL)
+	dst[st_idx] = src[st_idx];
+      else if (src[st_idx] != NULL)
+	{
+	  re_node_set merged_set;
+	  err = re_node_set_init_union (&merged_set, &dst[st_idx]->nodes,
+					&src[st_idx]->nodes);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    return err;
+	  dst[st_idx] = re_acquire_state (&err, dfa, &merged_set);
+	  re_node_set_free (&merged_set);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    return err;
+	}
+    }
+  return REG_NOERROR;
+}
+
+static reg_errcode_t
+update_cur_sifted_state (const re_match_context_t *mctx,
+			 re_sift_context_t *sctx, Idx str_idx,
+			 re_node_set *dest_nodes)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  reg_errcode_t err = REG_NOERROR;
+  const re_node_set *candidates;
+  candidates = ((mctx->state_log[str_idx] == NULL) ? NULL
+		: &mctx->state_log[str_idx]->nodes);
+
+  if (dest_nodes->nelem == 0)
+    sctx->sifted_states[str_idx] = NULL;
+  else
+    {
+      if (candidates)
+	{
+	  /* At first, add the nodes which can epsilon transit to a node in
+	     DEST_NODE.  */
+	  err = add_epsilon_src_nodes (dfa, dest_nodes, candidates);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    return err;
+
+	  /* Then, check the limitations in the current sift_context.  */
+	  if (sctx->limits.nelem)
+	    {
+	      err = check_subexp_limits (dfa, dest_nodes, candidates, &sctx->limits,
+					 mctx->bkref_ents, str_idx);
+	      if (__glibc_unlikely (err != REG_NOERROR))
+		return err;
+	    }
+	}
+
+      sctx->sifted_states[str_idx] = re_acquire_state (&err, dfa, dest_nodes);
+      if (__glibc_unlikely (err != REG_NOERROR))
+	return err;
+    }
+
+  if (candidates && mctx->state_log[str_idx]->has_backref)
+    {
+      err = sift_states_bkref (mctx, sctx, str_idx, candidates);
+      if (__glibc_unlikely (err != REG_NOERROR))
+	return err;
+    }
+  return REG_NOERROR;
+}
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+add_epsilon_src_nodes (const re_dfa_t *dfa, re_node_set *dest_nodes,
+		       const re_node_set *candidates)
+{
+  reg_errcode_t err = REG_NOERROR;
+  Idx i;
+
+  re_dfastate_t *state = re_acquire_state (&err, dfa, dest_nodes);
+  if (__glibc_unlikely (err != REG_NOERROR))
+    return err;
+
+  if (!state->inveclosure.alloc)
+    {
+      err = re_node_set_alloc (&state->inveclosure, dest_nodes->nelem);
+      if (__glibc_unlikely (err != REG_NOERROR))
+	return REG_ESPACE;
+      for (i = 0; i < dest_nodes->nelem; i++)
+	{
+	  err = re_node_set_merge (&state->inveclosure,
+				   dfa->inveclosures + dest_nodes->elems[i]);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    return REG_ESPACE;
+	}
+    }
+  return re_node_set_add_intersect (dest_nodes, candidates,
+				    &state->inveclosure);
+}
+
+static reg_errcode_t
+sub_epsilon_src_nodes (const re_dfa_t *dfa, Idx node, re_node_set *dest_nodes,
+		       const re_node_set *candidates)
+{
+    Idx ecl_idx;
+    reg_errcode_t err;
+    re_node_set *inv_eclosure = dfa->inveclosures + node;
+    re_node_set except_nodes;
+    re_node_set_init_empty (&except_nodes);
+    for (ecl_idx = 0; ecl_idx < inv_eclosure->nelem; ++ecl_idx)
+      {
+	Idx cur_node = inv_eclosure->elems[ecl_idx];
+	if (cur_node == node)
+	  continue;
+	if (IS_EPSILON_NODE (dfa->nodes[cur_node].type))
+	  {
+	    Idx edst1 = dfa->edests[cur_node].elems[0];
+	    Idx edst2 = ((dfa->edests[cur_node].nelem > 1)
+			 ? dfa->edests[cur_node].elems[1] : -1);
+	    if ((!re_node_set_contains (inv_eclosure, edst1)
+		 && re_node_set_contains (dest_nodes, edst1))
+		|| (edst2 > 0
+		    && !re_node_set_contains (inv_eclosure, edst2)
+		    && re_node_set_contains (dest_nodes, edst2)))
+	      {
+		err = re_node_set_add_intersect (&except_nodes, candidates,
+						 dfa->inveclosures + cur_node);
+		if (__glibc_unlikely (err != REG_NOERROR))
+		  {
+		    re_node_set_free (&except_nodes);
+		    return err;
+		  }
+	      }
+	  }
+      }
+    for (ecl_idx = 0; ecl_idx < inv_eclosure->nelem; ++ecl_idx)
+      {
+	Idx cur_node = inv_eclosure->elems[ecl_idx];
+	if (!re_node_set_contains (&except_nodes, cur_node))
+	  {
+	    Idx idx = re_node_set_contains (dest_nodes, cur_node) - 1;
+	    re_node_set_remove_at (dest_nodes, idx);
+	  }
+      }
+    re_node_set_free (&except_nodes);
+    return REG_NOERROR;
+}
+
+static bool
+check_dst_limits (const re_match_context_t *mctx, const re_node_set *limits,
+		  Idx dst_node, Idx dst_idx, Idx src_node, Idx src_idx)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  Idx lim_idx, src_pos, dst_pos;
+
+  Idx dst_bkref_idx = search_cur_bkref_entry (mctx, dst_idx);
+  Idx src_bkref_idx = search_cur_bkref_entry (mctx, src_idx);
+  for (lim_idx = 0; lim_idx < limits->nelem; ++lim_idx)
+    {
+      Idx subexp_idx;
+      struct re_backref_cache_entry *ent;
+      ent = mctx->bkref_ents + limits->elems[lim_idx];
+      subexp_idx = dfa->nodes[ent->node].opr.idx;
+
+      dst_pos = check_dst_limits_calc_pos (mctx, limits->elems[lim_idx],
+					   subexp_idx, dst_node, dst_idx,
+					   dst_bkref_idx);
+      src_pos = check_dst_limits_calc_pos (mctx, limits->elems[lim_idx],
+					   subexp_idx, src_node, src_idx,
+					   src_bkref_idx);
+
+      /* In case of:
+	 <src> <dst> ( <subexp> )
+	 ( <subexp> ) <src> <dst>
+	 ( <subexp1> <src> <subexp2> <dst> <subexp3> )  */
+      if (src_pos == dst_pos)
+	continue; /* This is unrelated limitation.  */
+      else
+	return true;
+    }
+  return false;
+}
+
+static int
+check_dst_limits_calc_pos_1 (const re_match_context_t *mctx, int boundaries,
+			     Idx subexp_idx, Idx from_node, Idx bkref_idx)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  const re_node_set *eclosures = dfa->eclosures + from_node;
+  Idx node_idx;
+
+  /* Else, we are on the boundary: examine the nodes on the epsilon
+     closure.  */
+  for (node_idx = 0; node_idx < eclosures->nelem; ++node_idx)
+    {
+      Idx node = eclosures->elems[node_idx];
+      switch (dfa->nodes[node].type)
+	{
+	case OP_BACK_REF:
+	  if (bkref_idx != -1)
+	    {
+	      struct re_backref_cache_entry *ent = mctx->bkref_ents + bkref_idx;
+	      do
+		{
+		  Idx dst;
+		  int cpos;
+
+		  if (ent->node != node)
+		    continue;
+
+		  if (subexp_idx < BITSET_WORD_BITS
+		      && !(ent->eps_reachable_subexps_map
+			   & ((bitset_word_t) 1 << subexp_idx)))
+		    continue;
+
+		  /* Recurse trying to reach the OP_OPEN_SUBEXP and
+		     OP_CLOSE_SUBEXP cases below.  But, if the
+		     destination node is the same node as the source
+		     node, don't recurse because it would cause an
+		     infinite loop: a regex that exhibits this behavior
+		     is ()\1*\1*  */
+		  dst = dfa->edests[node].elems[0];
+		  if (dst == from_node)
+		    {
+		      if (boundaries & 1)
+			return -1;
+		      else /* if (boundaries & 2) */
+			return 0;
+		    }
+
+		  cpos =
+		    check_dst_limits_calc_pos_1 (mctx, boundaries, subexp_idx,
+						 dst, bkref_idx);
+		  if (cpos == -1 /* && (boundaries & 1) */)
+		    return -1;
+		  if (cpos == 0 && (boundaries & 2))
+		    return 0;
+
+		  if (subexp_idx < BITSET_WORD_BITS)
+		    ent->eps_reachable_subexps_map
+		      &= ~((bitset_word_t) 1 << subexp_idx);
+		}
+	      while (ent++->more);
+	    }
+	  break;
+
+	case OP_OPEN_SUBEXP:
+	  if ((boundaries & 1) && subexp_idx == dfa->nodes[node].opr.idx)
+	    return -1;
+	  break;
+
+	case OP_CLOSE_SUBEXP:
+	  if ((boundaries & 2) && subexp_idx == dfa->nodes[node].opr.idx)
+	    return 0;
+	  break;
+
+	default:
+	    break;
+	}
+    }
+
+  return (boundaries & 2) ? 1 : 0;
+}
+
+static int
+check_dst_limits_calc_pos (const re_match_context_t *mctx, Idx limit,
+			   Idx subexp_idx, Idx from_node, Idx str_idx,
+			   Idx bkref_idx)
+{
+  struct re_backref_cache_entry *lim = mctx->bkref_ents + limit;
+  int boundaries;
+
+  /* If we are outside the range of the subexpression, return -1 or 1.  */
+  if (str_idx < lim->subexp_from)
+    return -1;
+
+  if (lim->subexp_to < str_idx)
+    return 1;
+
+  /* If we are within the subexpression, return 0.  */
+  boundaries = (str_idx == lim->subexp_from);
+  boundaries |= (str_idx == lim->subexp_to) << 1;
+  if (boundaries == 0)
+    return 0;
+
+  /* Else, examine epsilon closure.  */
+  return check_dst_limits_calc_pos_1 (mctx, boundaries, subexp_idx,
+				      from_node, bkref_idx);
+}
+
+/* Check the limitations of sub expressions LIMITS, and remove the nodes
+   which are against limitations from DEST_NODES. */
+
+static reg_errcode_t
+check_subexp_limits (const re_dfa_t *dfa, re_node_set *dest_nodes,
+		     const re_node_set *candidates, re_node_set *limits,
+		     struct re_backref_cache_entry *bkref_ents, Idx str_idx)
+{
+  reg_errcode_t err;
+  Idx node_idx, lim_idx;
+
+  for (lim_idx = 0; lim_idx < limits->nelem; ++lim_idx)
+    {
+      Idx subexp_idx;
+      struct re_backref_cache_entry *ent;
+      ent = bkref_ents + limits->elems[lim_idx];
+
+      if (str_idx <= ent->subexp_from || ent->str_idx < str_idx)
+	continue; /* This is unrelated limitation.  */
+
+      subexp_idx = dfa->nodes[ent->node].opr.idx;
+      if (ent->subexp_to == str_idx)
+	{
+	  Idx ops_node = -1;
+	  Idx cls_node = -1;
+	  for (node_idx = 0; node_idx < dest_nodes->nelem; ++node_idx)
+	    {
+	      Idx node = dest_nodes->elems[node_idx];
+	      re_token_type_t type = dfa->nodes[node].type;
+	      if (type == OP_OPEN_SUBEXP
+		  && subexp_idx == dfa->nodes[node].opr.idx)
+		ops_node = node;
+	      else if (type == OP_CLOSE_SUBEXP
+		       && subexp_idx == dfa->nodes[node].opr.idx)
+		cls_node = node;
+	    }
+
+	  /* Check the limitation of the open subexpression.  */
+	  /* Note that (ent->subexp_to = str_idx != ent->subexp_from).  */
+	  if (ops_node >= 0)
+	    {
+	      err = sub_epsilon_src_nodes (dfa, ops_node, dest_nodes,
+					   candidates);
+	      if (__glibc_unlikely (err != REG_NOERROR))
+		return err;
+	    }
+
+	  /* Check the limitation of the close subexpression.  */
+	  if (cls_node >= 0)
+	    for (node_idx = 0; node_idx < dest_nodes->nelem; ++node_idx)
+	      {
+		Idx node = dest_nodes->elems[node_idx];
+		if (!re_node_set_contains (dfa->inveclosures + node,
+					   cls_node)
+		    && !re_node_set_contains (dfa->eclosures + node,
+					      cls_node))
+		  {
+		    /* It is against this limitation.
+		       Remove it form the current sifted state.  */
+		    err = sub_epsilon_src_nodes (dfa, node, dest_nodes,
+						 candidates);
+		    if (__glibc_unlikely (err != REG_NOERROR))
+		      return err;
+		    --node_idx;
+		  }
+	      }
+	}
+      else /* (ent->subexp_to != str_idx)  */
+	{
+	  for (node_idx = 0; node_idx < dest_nodes->nelem; ++node_idx)
+	    {
+	      Idx node = dest_nodes->elems[node_idx];
+	      re_token_type_t type = dfa->nodes[node].type;
+	      if (type == OP_CLOSE_SUBEXP || type == OP_OPEN_SUBEXP)
+		{
+		  if (subexp_idx != dfa->nodes[node].opr.idx)
+		    continue;
+		  /* It is against this limitation.
+		     Remove it form the current sifted state.  */
+		  err = sub_epsilon_src_nodes (dfa, node, dest_nodes,
+					       candidates);
+		  if (__glibc_unlikely (err != REG_NOERROR))
+		    return err;
+		}
+	    }
+	}
+    }
+  return REG_NOERROR;
+}
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+sift_states_bkref (const re_match_context_t *mctx, re_sift_context_t *sctx,
+		   Idx str_idx, const re_node_set *candidates)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  reg_errcode_t err;
+  Idx node_idx, node;
+  re_sift_context_t local_sctx;
+  Idx first_idx = search_cur_bkref_entry (mctx, str_idx);
+
+  if (first_idx == -1)
+    return REG_NOERROR;
+
+  local_sctx.sifted_states = NULL; /* Mark that it hasn't been initialized.  */
+
+  for (node_idx = 0; node_idx < candidates->nelem; ++node_idx)
+    {
+      Idx enabled_idx;
+      re_token_type_t type;
+      struct re_backref_cache_entry *entry;
+      node = candidates->elems[node_idx];
+      type = dfa->nodes[node].type;
+      /* Avoid infinite loop for the REs like "()\1+".  */
+      if (node == sctx->last_node && str_idx == sctx->last_str_idx)
+	continue;
+      if (type != OP_BACK_REF)
+	continue;
+
+      entry = mctx->bkref_ents + first_idx;
+      enabled_idx = first_idx;
+      do
+	{
+	  Idx subexp_len;
+	  Idx to_idx;
+	  Idx dst_node;
+	  bool ok;
+	  re_dfastate_t *cur_state;
+
+	  if (entry->node != node)
+	    continue;
+	  subexp_len = entry->subexp_to - entry->subexp_from;
+	  to_idx = str_idx + subexp_len;
+	  dst_node = (subexp_len ? dfa->nexts[node]
+		      : dfa->edests[node].elems[0]);
+
+	  if (to_idx > sctx->last_str_idx
+	      || sctx->sifted_states[to_idx] == NULL
+	      || !STATE_NODE_CONTAINS (sctx->sifted_states[to_idx], dst_node)
+	      || check_dst_limits (mctx, &sctx->limits, node,
+				   str_idx, dst_node, to_idx))
+	    continue;
+
+	  if (local_sctx.sifted_states == NULL)
+	    {
+	      local_sctx = *sctx;
+	      err = re_node_set_init_copy (&local_sctx.limits, &sctx->limits);
+	      if (__glibc_unlikely (err != REG_NOERROR))
+		goto free_return;
+	    }
+	  local_sctx.last_node = node;
+	  local_sctx.last_str_idx = str_idx;
+	  ok = re_node_set_insert (&local_sctx.limits, enabled_idx);
+	  if (__glibc_unlikely (! ok))
+	    {
+	      err = REG_ESPACE;
+	      goto free_return;
+	    }
+	  cur_state = local_sctx.sifted_states[str_idx];
+	  err = sift_states_backward (mctx, &local_sctx);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    goto free_return;
+	  if (sctx->limited_states != NULL)
+	    {
+	      err = merge_state_array (dfa, sctx->limited_states,
+				       local_sctx.sifted_states,
+				       str_idx + 1);
+	      if (__glibc_unlikely (err != REG_NOERROR))
+		goto free_return;
+	    }
+	  local_sctx.sifted_states[str_idx] = cur_state;
+	  re_node_set_remove (&local_sctx.limits, enabled_idx);
+
+	  /* mctx->bkref_ents may have changed, reload the pointer.  */
+	  entry = mctx->bkref_ents + enabled_idx;
+	}
+      while (enabled_idx++, entry++->more);
+    }
+  err = REG_NOERROR;
+ free_return:
+  if (local_sctx.sifted_states != NULL)
+    {
+      re_node_set_free (&local_sctx.limits);
+    }
+
+  return err;
+}
+
+
+#ifdef RE_ENABLE_I18N
+static int
+sift_states_iter_mb (const re_match_context_t *mctx, re_sift_context_t *sctx,
+		     Idx node_idx, Idx str_idx, Idx max_str_idx)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  int naccepted;
+  /* Check the node can accept "multi byte".  */
+  naccepted = check_node_accept_bytes (dfa, node_idx, &mctx->input, str_idx);
+  if (naccepted > 0 && str_idx + naccepted <= max_str_idx
+      && !STATE_NODE_CONTAINS (sctx->sifted_states[str_idx + naccepted],
+			       dfa->nexts[node_idx]))
+    /* The node can't accept the "multi byte", or the
+       destination was already thrown away, then the node
+       couldn't accept the current input "multi byte".   */
+    naccepted = 0;
+  /* Otherwise, it is sure that the node could accept
+     'naccepted' bytes input.  */
+  return naccepted;
+}
+#endif /* RE_ENABLE_I18N */
+
+
+/* Functions for state transition.  */
+
+/* Return the next state to which the current state STATE will transit by
+   accepting the current input byte, and update STATE_LOG if necessary.
+   Return NULL on failure.
+   If STATE can accept a multibyte char/collating element/back reference
+   update the destination of STATE_LOG.  */
+
+static re_dfastate_t *
+__attribute_warn_unused_result__
+transit_state (reg_errcode_t *err, re_match_context_t *mctx,
+	       re_dfastate_t *state)
+{
+  re_dfastate_t **trtable;
+  unsigned char ch;
+
+#ifdef RE_ENABLE_I18N
+  /* If the current state can accept multibyte.  */
+  if (__glibc_unlikely (state->accept_mb))
+    {
+      *err = transit_state_mb (mctx, state);
+      if (__glibc_unlikely (*err != REG_NOERROR))
+	return NULL;
+    }
+#endif /* RE_ENABLE_I18N */
+
+  /* Then decide the next state with the single byte.  */
+#if 0
+  if (0)
+    /* don't use transition table  */
+    return transit_state_sb (err, mctx, state);
+#endif
+
+  /* Use transition table  */
+  ch = re_string_fetch_byte (&mctx->input);
+  for (;;)
+    {
+      trtable = state->trtable;
+      if (__glibc_likely (trtable != NULL))
+	return trtable[ch];
+
+      trtable = state->word_trtable;
+      if (__glibc_likely (trtable != NULL))
+	{
+	  unsigned int context;
+	  context
+	    = re_string_context_at (&mctx->input,
+				    re_string_cur_idx (&mctx->input) - 1,
+				    mctx->eflags);
+	  if (IS_WORD_CONTEXT (context))
+	    return trtable[ch + SBC_MAX];
+	  else
+	    return trtable[ch];
+	}
+
+      if (!build_trtable (mctx->dfa, state))
+	{
+	  *err = REG_ESPACE;
+	  return NULL;
+	}
+
+      /* Retry, we now have a transition table.  */
+    }
+}
+
+/* Update the state_log if we need */
+static re_dfastate_t *
+merge_state_with_log (reg_errcode_t *err, re_match_context_t *mctx,
+		      re_dfastate_t *next_state)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  Idx cur_idx = re_string_cur_idx (&mctx->input);
+
+  if (cur_idx > mctx->state_log_top)
+    {
+      mctx->state_log[cur_idx] = next_state;
+      mctx->state_log_top = cur_idx;
+    }
+  else if (mctx->state_log[cur_idx] == 0)
+    {
+      mctx->state_log[cur_idx] = next_state;
+    }
+  else
+    {
+      re_dfastate_t *pstate;
+      unsigned int context;
+      re_node_set next_nodes, *log_nodes, *table_nodes = NULL;
+      /* If (state_log[cur_idx] != 0), it implies that cur_idx is
+	 the destination of a multibyte char/collating element/
+	 back reference.  Then the next state is the union set of
+	 these destinations and the results of the transition table.  */
+      pstate = mctx->state_log[cur_idx];
+      log_nodes = pstate->entrance_nodes;
+      if (next_state != NULL)
+	{
+	  table_nodes = next_state->entrance_nodes;
+	  *err = re_node_set_init_union (&next_nodes, table_nodes,
+					     log_nodes);
+	  if (__glibc_unlikely (*err != REG_NOERROR))
+	    return NULL;
+	}
+      else
+	next_nodes = *log_nodes;
+      /* Note: We already add the nodes of the initial state,
+	 then we don't need to add them here.  */
+
+      context = re_string_context_at (&mctx->input,
+				      re_string_cur_idx (&mctx->input) - 1,
+				      mctx->eflags);
+      next_state = mctx->state_log[cur_idx]
+	= re_acquire_state_context (err, dfa, &next_nodes, context);
+      /* We don't need to check errors here, since the return value of
+	 this function is next_state and ERR is already set.  */
+
+      if (table_nodes != NULL)
+	re_node_set_free (&next_nodes);
+    }
+
+  if (__glibc_unlikely (dfa->nbackref) && next_state != NULL)
+    {
+      /* Check OP_OPEN_SUBEXP in the current state in case that we use them
+	 later.  We must check them here, since the back references in the
+	 next state might use them.  */
+      *err = check_subexp_matching_top (mctx, &next_state->nodes,
+					cur_idx);
+      if (__glibc_unlikely (*err != REG_NOERROR))
+	return NULL;
+
+      /* If the next state has back references.  */
+      if (next_state->has_backref)
+	{
+	  *err = transit_state_bkref (mctx, &next_state->nodes);
+	  if (__glibc_unlikely (*err != REG_NOERROR))
+	    return NULL;
+	  next_state = mctx->state_log[cur_idx];
+	}
+    }
+
+  return next_state;
+}
+
+/* Skip bytes in the input that correspond to part of a
+   multi-byte match, then look in the log for a state
+   from which to restart matching.  */
+static re_dfastate_t *
+find_recover_state (reg_errcode_t *err, re_match_context_t *mctx)
+{
+  re_dfastate_t *cur_state;
+  do
+    {
+      Idx max = mctx->state_log_top;
+      Idx cur_str_idx = re_string_cur_idx (&mctx->input);
+
+      do
+	{
+	  if (++cur_str_idx > max)
+	    return NULL;
+	  re_string_skip_bytes (&mctx->input, 1);
+	}
+      while (mctx->state_log[cur_str_idx] == NULL);
+
+      cur_state = merge_state_with_log (err, mctx, NULL);
+    }
+  while (*err == REG_NOERROR && cur_state == NULL);
+  return cur_state;
+}
+
+/* Helper functions for transit_state.  */
+
+/* From the node set CUR_NODES, pick up the nodes whose types are
+   OP_OPEN_SUBEXP and which have corresponding back references in the regular
+   expression. And register them to use them later for evaluating the
+   corresponding back references.  */
+
+static reg_errcode_t
+check_subexp_matching_top (re_match_context_t *mctx, re_node_set *cur_nodes,
+			   Idx str_idx)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  Idx node_idx;
+  reg_errcode_t err;
+
+  /* TODO: This isn't efficient.
+	   Because there might be more than one nodes whose types are
+	   OP_OPEN_SUBEXP and whose index is SUBEXP_IDX, we must check all
+	   nodes.
+	   E.g. RE: (a){2}  */
+  for (node_idx = 0; node_idx < cur_nodes->nelem; ++node_idx)
+    {
+      Idx node = cur_nodes->elems[node_idx];
+      if (dfa->nodes[node].type == OP_OPEN_SUBEXP
+	  && dfa->nodes[node].opr.idx < BITSET_WORD_BITS
+	  && (dfa->used_bkref_map
+	      & ((bitset_word_t) 1 << dfa->nodes[node].opr.idx)))
+	{
+	  err = match_ctx_add_subtop (mctx, node, str_idx);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    return err;
+	}
+    }
+  return REG_NOERROR;
+}
+
+#if 0
+/* Return the next state to which the current state STATE will transit by
+   accepting the current input byte.  Return NULL on failure.  */
+
+static re_dfastate_t *
+transit_state_sb (reg_errcode_t *err, re_match_context_t *mctx,
+		  re_dfastate_t *state)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  re_node_set next_nodes;
+  re_dfastate_t *next_state;
+  Idx node_cnt, cur_str_idx = re_string_cur_idx (&mctx->input);
+  unsigned int context;
+
+  *err = re_node_set_alloc (&next_nodes, state->nodes.nelem + 1);
+  if (__glibc_unlikely (*err != REG_NOERROR))
+    return NULL;
+  for (node_cnt = 0; node_cnt < state->nodes.nelem; ++node_cnt)
+    {
+      Idx cur_node = state->nodes.elems[node_cnt];
+      if (check_node_accept (mctx, dfa->nodes + cur_node, cur_str_idx))
+	{
+	  *err = re_node_set_merge (&next_nodes,
+				    dfa->eclosures + dfa->nexts[cur_node]);
+	  if (__glibc_unlikely (*err != REG_NOERROR))
+	    {
+	      re_node_set_free (&next_nodes);
+	      return NULL;
+	    }
+	}
+    }
+  context = re_string_context_at (&mctx->input, cur_str_idx, mctx->eflags);
+  next_state = re_acquire_state_context (err, dfa, &next_nodes, context);
+  /* We don't need to check errors here, since the return value of
+     this function is next_state and ERR is already set.  */
+
+  re_node_set_free (&next_nodes);
+  re_string_skip_bytes (&mctx->input, 1);
+  return next_state;
+}
+#endif
+
+#ifdef RE_ENABLE_I18N
+static reg_errcode_t
+transit_state_mb (re_match_context_t *mctx, re_dfastate_t *pstate)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  reg_errcode_t err;
+  Idx i;
+
+  for (i = 0; i < pstate->nodes.nelem; ++i)
+    {
+      re_node_set dest_nodes, *new_nodes;
+      Idx cur_node_idx = pstate->nodes.elems[i];
+      int naccepted;
+      Idx dest_idx;
+      unsigned int context;
+      re_dfastate_t *dest_state;
+
+      if (!dfa->nodes[cur_node_idx].accept_mb)
+	continue;
+
+      if (dfa->nodes[cur_node_idx].constraint)
+	{
+	  context = re_string_context_at (&mctx->input,
+					  re_string_cur_idx (&mctx->input),
+					  mctx->eflags);
+	  if (NOT_SATISFY_NEXT_CONSTRAINT (dfa->nodes[cur_node_idx].constraint,
+					   context))
+	    continue;
+	}
+
+      /* How many bytes the node can accept?  */
+      naccepted = check_node_accept_bytes (dfa, cur_node_idx, &mctx->input,
+					   re_string_cur_idx (&mctx->input));
+      if (naccepted == 0)
+	continue;
+
+      /* The node can accepts 'naccepted' bytes.  */
+      dest_idx = re_string_cur_idx (&mctx->input) + naccepted;
+      mctx->max_mb_elem_len = ((mctx->max_mb_elem_len < naccepted) ? naccepted
+			       : mctx->max_mb_elem_len);
+      err = clean_state_log_if_needed (mctx, dest_idx);
+      if (__glibc_unlikely (err != REG_NOERROR))
+	return err;
+      DEBUG_ASSERT (dfa->nexts[cur_node_idx] != -1);
+      new_nodes = dfa->eclosures + dfa->nexts[cur_node_idx];
+
+      dest_state = mctx->state_log[dest_idx];
+      if (dest_state == NULL)
+	dest_nodes = *new_nodes;
+      else
+	{
+	  err = re_node_set_init_union (&dest_nodes,
+					dest_state->entrance_nodes, new_nodes);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    return err;
+	}
+      context = re_string_context_at (&mctx->input, dest_idx - 1,
+				      mctx->eflags);
+      mctx->state_log[dest_idx]
+	= re_acquire_state_context (&err, dfa, &dest_nodes, context);
+      if (dest_state != NULL)
+	re_node_set_free (&dest_nodes);
+      if (__glibc_unlikely (mctx->state_log[dest_idx] == NULL
+			    && err != REG_NOERROR))
+	return err;
+    }
+  return REG_NOERROR;
+}
+#endif /* RE_ENABLE_I18N */
+
+static reg_errcode_t
+transit_state_bkref (re_match_context_t *mctx, const re_node_set *nodes)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  reg_errcode_t err;
+  Idx i;
+  Idx cur_str_idx = re_string_cur_idx (&mctx->input);
+
+  for (i = 0; i < nodes->nelem; ++i)
+    {
+      Idx dest_str_idx, prev_nelem, bkc_idx;
+      Idx node_idx = nodes->elems[i];
+      unsigned int context;
+      const re_token_t *node = dfa->nodes + node_idx;
+      re_node_set *new_dest_nodes;
+
+      /* Check whether 'node' is a backreference or not.  */
+      if (node->type != OP_BACK_REF)
+	continue;
+
+      if (node->constraint)
+	{
+	  context = re_string_context_at (&mctx->input, cur_str_idx,
+					  mctx->eflags);
+	  if (NOT_SATISFY_NEXT_CONSTRAINT (node->constraint, context))
+	    continue;
+	}
+
+      /* 'node' is a backreference.
+	 Check the substring which the substring matched.  */
+      bkc_idx = mctx->nbkref_ents;
+      err = get_subexp (mctx, node_idx, cur_str_idx);
+      if (__glibc_unlikely (err != REG_NOERROR))
+	goto free_return;
+
+      /* And add the epsilon closures (which is 'new_dest_nodes') of
+	 the backreference to appropriate state_log.  */
+      DEBUG_ASSERT (dfa->nexts[node_idx] != -1);
+      for (; bkc_idx < mctx->nbkref_ents; ++bkc_idx)
+	{
+	  Idx subexp_len;
+	  re_dfastate_t *dest_state;
+	  struct re_backref_cache_entry *bkref_ent;
+	  bkref_ent = mctx->bkref_ents + bkc_idx;
+	  if (bkref_ent->node != node_idx || bkref_ent->str_idx != cur_str_idx)
+	    continue;
+	  subexp_len = bkref_ent->subexp_to - bkref_ent->subexp_from;
+	  new_dest_nodes = (subexp_len == 0
+			    ? dfa->eclosures + dfa->edests[node_idx].elems[0]
+			    : dfa->eclosures + dfa->nexts[node_idx]);
+	  dest_str_idx = (cur_str_idx + bkref_ent->subexp_to
+			  - bkref_ent->subexp_from);
+	  context = re_string_context_at (&mctx->input, dest_str_idx - 1,
+					  mctx->eflags);
+	  dest_state = mctx->state_log[dest_str_idx];
+	  prev_nelem = ((mctx->state_log[cur_str_idx] == NULL) ? 0
+			: mctx->state_log[cur_str_idx]->nodes.nelem);
+	  /* Add 'new_dest_node' to state_log.  */
+	  if (dest_state == NULL)
+	    {
+	      mctx->state_log[dest_str_idx]
+		= re_acquire_state_context (&err, dfa, new_dest_nodes,
+					    context);
+	      if (__glibc_unlikely (mctx->state_log[dest_str_idx] == NULL
+				    && err != REG_NOERROR))
+		goto free_return;
+	    }
+	  else
+	    {
+	      re_node_set dest_nodes;
+	      err = re_node_set_init_union (&dest_nodes,
+					    dest_state->entrance_nodes,
+					    new_dest_nodes);
+	      if (__glibc_unlikely (err != REG_NOERROR))
+		{
+		  re_node_set_free (&dest_nodes);
+		  goto free_return;
+		}
+	      mctx->state_log[dest_str_idx]
+		= re_acquire_state_context (&err, dfa, &dest_nodes, context);
+	      re_node_set_free (&dest_nodes);
+	      if (__glibc_unlikely (mctx->state_log[dest_str_idx] == NULL
+				    && err != REG_NOERROR))
+		goto free_return;
+	    }
+	  /* We need to check recursively if the backreference can epsilon
+	     transit.  */
+	  if (subexp_len == 0
+	      && mctx->state_log[cur_str_idx]->nodes.nelem > prev_nelem)
+	    {
+	      err = check_subexp_matching_top (mctx, new_dest_nodes,
+					       cur_str_idx);
+	      if (__glibc_unlikely (err != REG_NOERROR))
+		goto free_return;
+	      err = transit_state_bkref (mctx, new_dest_nodes);
+	      if (__glibc_unlikely (err != REG_NOERROR))
+		goto free_return;
+	    }
+	}
+    }
+  err = REG_NOERROR;
+ free_return:
+  return err;
+}
+
+/* Enumerate all the candidates which the backreference BKREF_NODE can match
+   at BKREF_STR_IDX, and register them by match_ctx_add_entry().
+   Note that we might collect inappropriate candidates here.
+   However, the cost of checking them strictly here is too high, then we
+   delay these checking for prune_impossible_nodes().  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+get_subexp (re_match_context_t *mctx, Idx bkref_node, Idx bkref_str_idx)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  Idx subexp_num, sub_top_idx;
+  const char *buf = (const char *) re_string_get_buffer (&mctx->input);
+  /* Return if we have already checked BKREF_NODE at BKREF_STR_IDX.  */
+  Idx cache_idx = search_cur_bkref_entry (mctx, bkref_str_idx);
+  if (cache_idx != -1)
+    {
+      const struct re_backref_cache_entry *entry
+	= mctx->bkref_ents + cache_idx;
+      do
+	if (entry->node == bkref_node)
+	  return REG_NOERROR; /* We already checked it.  */
+      while (entry++->more);
+    }
+
+  subexp_num = dfa->nodes[bkref_node].opr.idx;
+
+  /* For each sub expression  */
+  for (sub_top_idx = 0; sub_top_idx < mctx->nsub_tops; ++sub_top_idx)
+    {
+      reg_errcode_t err;
+      re_sub_match_top_t *sub_top = mctx->sub_tops[sub_top_idx];
+      re_sub_match_last_t *sub_last;
+      Idx sub_last_idx, sl_str, bkref_str_off;
+
+      if (dfa->nodes[sub_top->node].opr.idx != subexp_num)
+	continue; /* It isn't related.  */
+
+      sl_str = sub_top->str_idx;
+      bkref_str_off = bkref_str_idx;
+      /* At first, check the last node of sub expressions we already
+	 evaluated.  */
+      for (sub_last_idx = 0; sub_last_idx < sub_top->nlasts; ++sub_last_idx)
+	{
+	  regoff_t sl_str_diff;
+	  sub_last = sub_top->lasts[sub_last_idx];
+	  sl_str_diff = sub_last->str_idx - sl_str;
+	  /* The matched string by the sub expression match with the substring
+	     at the back reference?  */
+	  if (sl_str_diff > 0)
+	    {
+	      if (__glibc_unlikely (bkref_str_off + sl_str_diff
+				    > mctx->input.valid_len))
+		{
+		  /* Not enough chars for a successful match.  */
+		  if (bkref_str_off + sl_str_diff > mctx->input.len)
+		    break;
+
+		  err = clean_state_log_if_needed (mctx,
+						   bkref_str_off
+						   + sl_str_diff);
+		  if (__glibc_unlikely (err != REG_NOERROR))
+		    return err;
+		  buf = (const char *) re_string_get_buffer (&mctx->input);
+		}
+	      if (memcmp (buf + bkref_str_off, buf + sl_str, sl_str_diff) != 0)
+		/* We don't need to search this sub expression any more.  */
+		break;
+	    }
+	  bkref_str_off += sl_str_diff;
+	  sl_str += sl_str_diff;
+	  err = get_subexp_sub (mctx, sub_top, sub_last, bkref_node,
+				bkref_str_idx);
+
+	  /* Reload buf, since the preceding call might have reallocated
+	     the buffer.  */
+	  buf = (const char *) re_string_get_buffer (&mctx->input);
+
+	  if (err == REG_NOMATCH)
+	    continue;
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    return err;
+	}
+
+      if (sub_last_idx < sub_top->nlasts)
+	continue;
+      if (sub_last_idx > 0)
+	++sl_str;
+      /* Then, search for the other last nodes of the sub expression.  */
+      for (; sl_str <= bkref_str_idx; ++sl_str)
+	{
+	  Idx cls_node;
+	  regoff_t sl_str_off;
+	  const re_node_set *nodes;
+	  sl_str_off = sl_str - sub_top->str_idx;
+	  /* The matched string by the sub expression match with the substring
+	     at the back reference?  */
+	  if (sl_str_off > 0)
+	    {
+	      if (__glibc_unlikely (bkref_str_off >= mctx->input.valid_len))
+		{
+		  /* If we are at the end of the input, we cannot match.  */
+		  if (bkref_str_off >= mctx->input.len)
+		    break;
+
+		  err = extend_buffers (mctx, bkref_str_off + 1);
+		  if (__glibc_unlikely (err != REG_NOERROR))
+		    return err;
+
+		  buf = (const char *) re_string_get_buffer (&mctx->input);
+		}
+	      if (buf [bkref_str_off++] != buf[sl_str - 1])
+		break; /* We don't need to search this sub expression
+			  any more.  */
+	    }
+	  if (mctx->state_log[sl_str] == NULL)
+	    continue;
+	  /* Does this state have a ')' of the sub expression?  */
+	  nodes = &mctx->state_log[sl_str]->nodes;
+	  cls_node = find_subexp_node (dfa, nodes, subexp_num,
+				       OP_CLOSE_SUBEXP);
+	  if (cls_node == -1)
+	    continue; /* No.  */
+	  if (sub_top->path == NULL)
+	    {
+	      sub_top->path = calloc (sizeof (state_array_t),
+				      sl_str - sub_top->str_idx + 1);
+	      if (sub_top->path == NULL)
+		return REG_ESPACE;
+	    }
+	  /* Can the OP_OPEN_SUBEXP node arrive the OP_CLOSE_SUBEXP node
+	     in the current context?  */
+	  err = check_arrival (mctx, sub_top->path, sub_top->node,
+			       sub_top->str_idx, cls_node, sl_str,
+			       OP_CLOSE_SUBEXP);
+	  if (err == REG_NOMATCH)
+	      continue;
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	      return err;
+	  sub_last = match_ctx_add_sublast (sub_top, cls_node, sl_str);
+	  if (__glibc_unlikely (sub_last == NULL))
+	    return REG_ESPACE;
+	  err = get_subexp_sub (mctx, sub_top, sub_last, bkref_node,
+				bkref_str_idx);
+	  buf = (const char *) re_string_get_buffer (&mctx->input);
+	  if (err == REG_NOMATCH)
+	    continue;
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    return err;
+	}
+    }
+  return REG_NOERROR;
+}
+
+/* Helper functions for get_subexp().  */
+
+/* Check SUB_LAST can arrive to the back reference BKREF_NODE at BKREF_STR.
+   If it can arrive, register the sub expression expressed with SUB_TOP
+   and SUB_LAST.  */
+
+static reg_errcode_t
+get_subexp_sub (re_match_context_t *mctx, const re_sub_match_top_t *sub_top,
+		re_sub_match_last_t *sub_last, Idx bkref_node, Idx bkref_str)
+{
+  reg_errcode_t err;
+  Idx to_idx;
+  /* Can the subexpression arrive the back reference?  */
+  err = check_arrival (mctx, &sub_last->path, sub_last->node,
+		       sub_last->str_idx, bkref_node, bkref_str,
+		       OP_OPEN_SUBEXP);
+  if (err != REG_NOERROR)
+    return err;
+  err = match_ctx_add_entry (mctx, bkref_node, bkref_str, sub_top->str_idx,
+			     sub_last->str_idx);
+  if (__glibc_unlikely (err != REG_NOERROR))
+    return err;
+  to_idx = bkref_str + sub_last->str_idx - sub_top->str_idx;
+  return clean_state_log_if_needed (mctx, to_idx);
+}
+
+/* Find the first node which is '(' or ')' and whose index is SUBEXP_IDX.
+   Search '(' if FL_OPEN, or search ')' otherwise.
+   TODO: This function isn't efficient...
+	 Because there might be more than one nodes whose types are
+	 OP_OPEN_SUBEXP and whose index is SUBEXP_IDX, we must check all
+	 nodes.
+	 E.g. RE: (a){2}  */
+
+static Idx
+find_subexp_node (const re_dfa_t *dfa, const re_node_set *nodes,
+		  Idx subexp_idx, int type)
+{
+  Idx cls_idx;
+  for (cls_idx = 0; cls_idx < nodes->nelem; ++cls_idx)
+    {
+      Idx cls_node = nodes->elems[cls_idx];
+      const re_token_t *node = dfa->nodes + cls_node;
+      if (node->type == type
+	  && node->opr.idx == subexp_idx)
+	return cls_node;
+    }
+  return -1;
+}
+
+/* Check whether the node TOP_NODE at TOP_STR can arrive to the node
+   LAST_NODE at LAST_STR.  We record the path onto PATH since it will be
+   heavily reused.
+   Return REG_NOERROR if it can arrive, REG_NOMATCH if it cannot,
+   REG_ESPACE if memory is exhausted.  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+check_arrival (re_match_context_t *mctx, state_array_t *path, Idx top_node,
+	       Idx top_str, Idx last_node, Idx last_str, int type)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  reg_errcode_t err = REG_NOERROR;
+  Idx subexp_num, backup_cur_idx, str_idx, null_cnt;
+  re_dfastate_t *cur_state = NULL;
+  re_node_set *cur_nodes, next_nodes;
+  re_dfastate_t **backup_state_log;
+  unsigned int context;
+
+  subexp_num = dfa->nodes[top_node].opr.idx;
+  /* Extend the buffer if we need.  */
+  if (__glibc_unlikely (path->alloc < last_str + mctx->max_mb_elem_len + 1))
+    {
+      re_dfastate_t **new_array;
+      Idx old_alloc = path->alloc;
+      Idx incr_alloc = last_str + mctx->max_mb_elem_len + 1;
+      Idx new_alloc;
+      if (__glibc_unlikely (IDX_MAX - old_alloc < incr_alloc))
+	return REG_ESPACE;
+      new_alloc = old_alloc + incr_alloc;
+      if (__glibc_unlikely (SIZE_MAX / sizeof (re_dfastate_t *) < new_alloc))
+	return REG_ESPACE;
+      new_array = re_realloc (path->array, re_dfastate_t *, new_alloc);
+      if (__glibc_unlikely (new_array == NULL))
+	return REG_ESPACE;
+      path->array = new_array;
+      path->alloc = new_alloc;
+      memset (new_array + old_alloc, '\0',
+	      sizeof (re_dfastate_t *) * (path->alloc - old_alloc));
+    }
+
+  str_idx = path->next_idx ? path->next_idx : top_str;
+
+  /* Temporary modify MCTX.  */
+  backup_state_log = mctx->state_log;
+  backup_cur_idx = mctx->input.cur_idx;
+  mctx->state_log = path->array;
+  mctx->input.cur_idx = str_idx;
+
+  /* Setup initial node set.  */
+  context = re_string_context_at (&mctx->input, str_idx - 1, mctx->eflags);
+  if (str_idx == top_str)
+    {
+      err = re_node_set_init_1 (&next_nodes, top_node);
+      if (__glibc_unlikely (err != REG_NOERROR))
+	return err;
+      err = check_arrival_expand_ecl (dfa, &next_nodes, subexp_num, type);
+      if (__glibc_unlikely (err != REG_NOERROR))
+	{
+	  re_node_set_free (&next_nodes);
+	  return err;
+	}
+    }
+  else
+    {
+      cur_state = mctx->state_log[str_idx];
+      if (cur_state && cur_state->has_backref)
+	{
+	  err = re_node_set_init_copy (&next_nodes, &cur_state->nodes);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    return err;
+	}
+      else
+	re_node_set_init_empty (&next_nodes);
+    }
+  if (str_idx == top_str || (cur_state && cur_state->has_backref))
+    {
+      if (next_nodes.nelem)
+	{
+	  err = expand_bkref_cache (mctx, &next_nodes, str_idx,
+				    subexp_num, type);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    {
+	      re_node_set_free (&next_nodes);
+	      return err;
+	    }
+	}
+      cur_state = re_acquire_state_context (&err, dfa, &next_nodes, context);
+      if (__glibc_unlikely (cur_state == NULL && err != REG_NOERROR))
+	{
+	  re_node_set_free (&next_nodes);
+	  return err;
+	}
+      mctx->state_log[str_idx] = cur_state;
+    }
+
+  for (null_cnt = 0; str_idx < last_str && null_cnt <= mctx->max_mb_elem_len;)
+    {
+      re_node_set_empty (&next_nodes);
+      if (mctx->state_log[str_idx + 1])
+	{
+	  err = re_node_set_merge (&next_nodes,
+				   &mctx->state_log[str_idx + 1]->nodes);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    {
+	      re_node_set_free (&next_nodes);
+	      return err;
+	    }
+	}
+      if (cur_state)
+	{
+	  err = check_arrival_add_next_nodes (mctx, str_idx,
+					      &cur_state->non_eps_nodes,
+					      &next_nodes);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    {
+	      re_node_set_free (&next_nodes);
+	      return err;
+	    }
+	}
+      ++str_idx;
+      if (next_nodes.nelem)
+	{
+	  err = check_arrival_expand_ecl (dfa, &next_nodes, subexp_num, type);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    {
+	      re_node_set_free (&next_nodes);
+	      return err;
+	    }
+	  err = expand_bkref_cache (mctx, &next_nodes, str_idx,
+				    subexp_num, type);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    {
+	      re_node_set_free (&next_nodes);
+	      return err;
+	    }
+	}
+      context = re_string_context_at (&mctx->input, str_idx - 1, mctx->eflags);
+      cur_state = re_acquire_state_context (&err, dfa, &next_nodes, context);
+      if (__glibc_unlikely (cur_state == NULL && err != REG_NOERROR))
+	{
+	  re_node_set_free (&next_nodes);
+	  return err;
+	}
+      mctx->state_log[str_idx] = cur_state;
+      null_cnt = cur_state == NULL ? null_cnt + 1 : 0;
+    }
+  re_node_set_free (&next_nodes);
+  cur_nodes = (mctx->state_log[last_str] == NULL ? NULL
+	       : &mctx->state_log[last_str]->nodes);
+  path->next_idx = str_idx;
+
+  /* Fix MCTX.  */
+  mctx->state_log = backup_state_log;
+  mctx->input.cur_idx = backup_cur_idx;
+
+  /* Then check the current node set has the node LAST_NODE.  */
+  if (cur_nodes != NULL && re_node_set_contains (cur_nodes, last_node))
+    return REG_NOERROR;
+
+  return REG_NOMATCH;
+}
+
+/* Helper functions for check_arrival.  */
+
+/* Calculate the destination nodes of CUR_NODES at STR_IDX, and append them
+   to NEXT_NODES.
+   TODO: This function is similar to the functions transit_state*(),
+	 however this function has many additional works.
+	 Can't we unify them?  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+check_arrival_add_next_nodes (re_match_context_t *mctx, Idx str_idx,
+			      re_node_set *cur_nodes, re_node_set *next_nodes)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  bool ok;
+  Idx cur_idx;
+#ifdef RE_ENABLE_I18N
+  reg_errcode_t err = REG_NOERROR;
+#endif
+  re_node_set union_set;
+  re_node_set_init_empty (&union_set);
+  for (cur_idx = 0; cur_idx < cur_nodes->nelem; ++cur_idx)
+    {
+      int naccepted = 0;
+      Idx cur_node = cur_nodes->elems[cur_idx];
+      DEBUG_ASSERT (!IS_EPSILON_NODE (dfa->nodes[cur_node].type));
+
+#ifdef RE_ENABLE_I18N
+      /* If the node may accept "multi byte".  */
+      if (dfa->nodes[cur_node].accept_mb)
+	{
+	  naccepted = check_node_accept_bytes (dfa, cur_node, &mctx->input,
+					       str_idx);
+	  if (naccepted > 1)
+	    {
+	      re_dfastate_t *dest_state;
+	      Idx next_node = dfa->nexts[cur_node];
+	      Idx next_idx = str_idx + naccepted;
+	      dest_state = mctx->state_log[next_idx];
+	      re_node_set_empty (&union_set);
+	      if (dest_state)
+		{
+		  err = re_node_set_merge (&union_set, &dest_state->nodes);
+		  if (__glibc_unlikely (err != REG_NOERROR))
+		    {
+		      re_node_set_free (&union_set);
+		      return err;
+		    }
+		}
+	      ok = re_node_set_insert (&union_set, next_node);
+	      if (__glibc_unlikely (! ok))
+		{
+		  re_node_set_free (&union_set);
+		  return REG_ESPACE;
+		}
+	      mctx->state_log[next_idx] = re_acquire_state (&err, dfa,
+							    &union_set);
+	      if (__glibc_unlikely (mctx->state_log[next_idx] == NULL
+				    && err != REG_NOERROR))
+		{
+		  re_node_set_free (&union_set);
+		  return err;
+		}
+	    }
+	}
+#endif /* RE_ENABLE_I18N */
+      if (naccepted
+	  || check_node_accept (mctx, dfa->nodes + cur_node, str_idx))
+	{
+	  ok = re_node_set_insert (next_nodes, dfa->nexts[cur_node]);
+	  if (__glibc_unlikely (! ok))
+	    {
+	      re_node_set_free (&union_set);
+	      return REG_ESPACE;
+	    }
+	}
+    }
+  re_node_set_free (&union_set);
+  return REG_NOERROR;
+}
+
+/* For all the nodes in CUR_NODES, add the epsilon closures of them to
+   CUR_NODES, however exclude the nodes which are:
+    - inside the sub expression whose number is EX_SUBEXP, if FL_OPEN.
+    - out of the sub expression whose number is EX_SUBEXP, if !FL_OPEN.
+*/
+
+static reg_errcode_t
+check_arrival_expand_ecl (const re_dfa_t *dfa, re_node_set *cur_nodes,
+			  Idx ex_subexp, int type)
+{
+  reg_errcode_t err;
+  Idx idx, outside_node;
+  re_node_set new_nodes;
+  DEBUG_ASSERT (cur_nodes->nelem);
+  err = re_node_set_alloc (&new_nodes, cur_nodes->nelem);
+  if (__glibc_unlikely (err != REG_NOERROR))
+    return err;
+  /* Create a new node set NEW_NODES with the nodes which are epsilon
+     closures of the node in CUR_NODES.  */
+
+  for (idx = 0; idx < cur_nodes->nelem; ++idx)
+    {
+      Idx cur_node = cur_nodes->elems[idx];
+      const re_node_set *eclosure = dfa->eclosures + cur_node;
+      outside_node = find_subexp_node (dfa, eclosure, ex_subexp, type);
+      if (outside_node == -1)
+	{
+	  /* There are no problematic nodes, just merge them.  */
+	  err = re_node_set_merge (&new_nodes, eclosure);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    {
+	      re_node_set_free (&new_nodes);
+	      return err;
+	    }
+	}
+      else
+	{
+	  /* There are problematic nodes, re-calculate incrementally.  */
+	  err = check_arrival_expand_ecl_sub (dfa, &new_nodes, cur_node,
+					      ex_subexp, type);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    {
+	      re_node_set_free (&new_nodes);
+	      return err;
+	    }
+	}
+    }
+  re_node_set_free (cur_nodes);
+  *cur_nodes = new_nodes;
+  return REG_NOERROR;
+}
+
+/* Helper function for check_arrival_expand_ecl.
+   Check incrementally the epsilon closure of TARGET, and if it isn't
+   problematic append it to DST_NODES.  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+check_arrival_expand_ecl_sub (const re_dfa_t *dfa, re_node_set *dst_nodes,
+			      Idx target, Idx ex_subexp, int type)
+{
+  Idx cur_node;
+  for (cur_node = target; !re_node_set_contains (dst_nodes, cur_node);)
+    {
+      bool ok;
+
+      if (dfa->nodes[cur_node].type == type
+	  && dfa->nodes[cur_node].opr.idx == ex_subexp)
+	{
+	  if (type == OP_CLOSE_SUBEXP)
+	    {
+	      ok = re_node_set_insert (dst_nodes, cur_node);
+	      if (__glibc_unlikely (! ok))
+		return REG_ESPACE;
+	    }
+	  break;
+	}
+      ok = re_node_set_insert (dst_nodes, cur_node);
+      if (__glibc_unlikely (! ok))
+	return REG_ESPACE;
+      if (dfa->edests[cur_node].nelem == 0)
+	break;
+      if (dfa->edests[cur_node].nelem == 2)
+	{
+	  reg_errcode_t err;
+	  err = check_arrival_expand_ecl_sub (dfa, dst_nodes,
+					      dfa->edests[cur_node].elems[1],
+					      ex_subexp, type);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    return err;
+	}
+      cur_node = dfa->edests[cur_node].elems[0];
+    }
+  return REG_NOERROR;
+}
+
+
+/* For all the back references in the current state, calculate the
+   destination of the back references by the appropriate entry
+   in MCTX->BKREF_ENTS.  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+expand_bkref_cache (re_match_context_t *mctx, re_node_set *cur_nodes,
+		    Idx cur_str, Idx subexp_num, int type)
+{
+  const re_dfa_t *const dfa = mctx->dfa;
+  reg_errcode_t err;
+  Idx cache_idx_start = search_cur_bkref_entry (mctx, cur_str);
+  struct re_backref_cache_entry *ent;
+
+  if (cache_idx_start == -1)
+    return REG_NOERROR;
+
+ restart:
+  ent = mctx->bkref_ents + cache_idx_start;
+  do
+    {
+      Idx to_idx, next_node;
+
+      /* Is this entry ENT is appropriate?  */
+      if (!re_node_set_contains (cur_nodes, ent->node))
+	continue; /* No.  */
+
+      to_idx = cur_str + ent->subexp_to - ent->subexp_from;
+      /* Calculate the destination of the back reference, and append it
+	 to MCTX->STATE_LOG.  */
+      if (to_idx == cur_str)
+	{
+	  /* The backreference did epsilon transit, we must re-check all the
+	     node in the current state.  */
+	  re_node_set new_dests;
+	  reg_errcode_t err2, err3;
+	  next_node = dfa->edests[ent->node].elems[0];
+	  if (re_node_set_contains (cur_nodes, next_node))
+	    continue;
+	  err = re_node_set_init_1 (&new_dests, next_node);
+	  err2 = check_arrival_expand_ecl (dfa, &new_dests, subexp_num, type);
+	  err3 = re_node_set_merge (cur_nodes, &new_dests);
+	  re_node_set_free (&new_dests);
+	  if (__glibc_unlikely (err != REG_NOERROR || err2 != REG_NOERROR
+				|| err3 != REG_NOERROR))
+	    {
+	      err = (err != REG_NOERROR ? err
+		     : (err2 != REG_NOERROR ? err2 : err3));
+	      return err;
+	    }
+	  /* TODO: It is still inefficient...  */
+	  goto restart;
+	}
+      else
+	{
+	  re_node_set union_set;
+	  next_node = dfa->nexts[ent->node];
+	  if (mctx->state_log[to_idx])
+	    {
+	      bool ok;
+	      if (re_node_set_contains (&mctx->state_log[to_idx]->nodes,
+					next_node))
+		continue;
+	      err = re_node_set_init_copy (&union_set,
+					   &mctx->state_log[to_idx]->nodes);
+	      ok = re_node_set_insert (&union_set, next_node);
+	      if (__glibc_unlikely (err != REG_NOERROR || ! ok))
+		{
+		  re_node_set_free (&union_set);
+		  err = err != REG_NOERROR ? err : REG_ESPACE;
+		  return err;
+		}
+	    }
+	  else
+	    {
+	      err = re_node_set_init_1 (&union_set, next_node);
+	      if (__glibc_unlikely (err != REG_NOERROR))
+		return err;
+	    }
+	  mctx->state_log[to_idx] = re_acquire_state (&err, dfa, &union_set);
+	  re_node_set_free (&union_set);
+	  if (__glibc_unlikely (mctx->state_log[to_idx] == NULL
+				&& err != REG_NOERROR))
+	    return err;
+	}
+    }
+  while (ent++->more);
+  return REG_NOERROR;
+}
+
+/* Build transition table for the state.
+   Return true if successful.  */
+
+static bool __attribute_noinline__
+build_trtable (const re_dfa_t *dfa, re_dfastate_t *state)
+{
+  reg_errcode_t err;
+  Idx i, j;
+  int ch;
+  bool need_word_trtable = false;
+  bitset_word_t elem, mask;
+  Idx ndests; /* Number of the destination states from 'state'.  */
+  re_dfastate_t **trtable;
+  re_dfastate_t *dest_states[SBC_MAX];
+  re_dfastate_t *dest_states_word[SBC_MAX];
+  re_dfastate_t *dest_states_nl[SBC_MAX];
+  re_node_set follows;
+  bitset_t acceptable;
+
+  /* We build DFA states which corresponds to the destination nodes
+     from 'state'.  'dests_node[i]' represents the nodes which i-th
+     destination state contains, and 'dests_ch[i]' represents the
+     characters which i-th destination state accepts.  */
+  re_node_set dests_node[SBC_MAX];
+  bitset_t dests_ch[SBC_MAX];
+
+  /* Initialize transition table.  */
+  state->word_trtable = state->trtable = NULL;
+
+  /* At first, group all nodes belonging to 'state' into several
+     destinations.  */
+  ndests = group_nodes_into_DFAstates (dfa, state, dests_node, dests_ch);
+  if (__glibc_unlikely (ndests <= 0))
+    {
+      /* Return false in case of an error, true otherwise.  */
+      if (ndests == 0)
+	{
+	  state->trtable = (re_dfastate_t **)
+	    calloc (sizeof (re_dfastate_t *), SBC_MAX);
+          if (__glibc_unlikely (state->trtable == NULL))
+            return false;
+	  return true;
+	}
+      return false;
+    }
+
+  err = re_node_set_alloc (&follows, ndests + 1);
+  if (__glibc_unlikely (err != REG_NOERROR))
+    {
+    out_free:
+      re_node_set_free (&follows);
+      for (i = 0; i < ndests; ++i)
+	re_node_set_free (dests_node + i);
+      return false;
+    }
+
+  bitset_empty (acceptable);
+
+  /* Then build the states for all destinations.  */
+  for (i = 0; i < ndests; ++i)
+    {
+      Idx next_node;
+      re_node_set_empty (&follows);
+      /* Merge the follows of this destination states.  */
+      for (j = 0; j < dests_node[i].nelem; ++j)
+	{
+	  next_node = dfa->nexts[dests_node[i].elems[j]];
+	  if (next_node != -1)
+	    {
+	      err = re_node_set_merge (&follows, dfa->eclosures + next_node);
+	      if (__glibc_unlikely (err != REG_NOERROR))
+		goto out_free;
+	    }
+	}
+      dest_states[i] = re_acquire_state_context (&err, dfa, &follows, 0);
+      if (__glibc_unlikely (dest_states[i] == NULL && err != REG_NOERROR))
+	goto out_free;
+      /* If the new state has context constraint,
+	 build appropriate states for these contexts.  */
+      if (dest_states[i]->has_constraint)
+	{
+	  dest_states_word[i] = re_acquire_state_context (&err, dfa, &follows,
+							  CONTEXT_WORD);
+	  if (__glibc_unlikely (dest_states_word[i] == NULL
+				&& err != REG_NOERROR))
+	    goto out_free;
+
+	  if (dest_states[i] != dest_states_word[i] && dfa->mb_cur_max > 1)
+	    need_word_trtable = true;
+
+	  dest_states_nl[i] = re_acquire_state_context (&err, dfa, &follows,
+							CONTEXT_NEWLINE);
+	  if (__glibc_unlikely (dest_states_nl[i] == NULL && err != REG_NOERROR))
+	    goto out_free;
+	}
+      else
+	{
+	  dest_states_word[i] = dest_states[i];
+	  dest_states_nl[i] = dest_states[i];
+	}
+      bitset_merge (acceptable, dests_ch[i]);
+    }
+
+  if (!__glibc_unlikely (need_word_trtable))
+    {
+      /* We don't care about whether the following character is a word
+	 character, or we are in a single-byte character set so we can
+	 discern by looking at the character code: allocate a
+	 256-entry transition table.  */
+      trtable = state->trtable =
+	(re_dfastate_t **) calloc (sizeof (re_dfastate_t *), SBC_MAX);
+      if (__glibc_unlikely (trtable == NULL))
+	goto out_free;
+
+      /* For all characters ch...:  */
+      for (i = 0; i < BITSET_WORDS; ++i)
+	for (ch = i * BITSET_WORD_BITS, elem = acceptable[i], mask = 1;
+	     elem;
+	     mask <<= 1, elem >>= 1, ++ch)
+	  if (__glibc_unlikely (elem & 1))
+	    {
+	      /* There must be exactly one destination which accepts
+		 character ch.  See group_nodes_into_DFAstates.  */
+	      for (j = 0; (dests_ch[j][i] & mask) == 0; ++j)
+		;
+
+	      /* j-th destination accepts the word character ch.  */
+	      if (dfa->word_char[i] & mask)
+		trtable[ch] = dest_states_word[j];
+	      else
+		trtable[ch] = dest_states[j];
+	    }
+    }
+  else
+    {
+      /* We care about whether the following character is a word
+	 character, and we are in a multi-byte character set: discern
+	 by looking at the character code: build two 256-entry
+	 transition tables, one starting at trtable[0] and one
+	 starting at trtable[SBC_MAX].  */
+      trtable = state->word_trtable =
+	(re_dfastate_t **) calloc (sizeof (re_dfastate_t *), 2 * SBC_MAX);
+      if (__glibc_unlikely (trtable == NULL))
+	goto out_free;
+
+      /* For all characters ch...:  */
+      for (i = 0; i < BITSET_WORDS; ++i)
+	for (ch = i * BITSET_WORD_BITS, elem = acceptable[i], mask = 1;
+	     elem;
+	     mask <<= 1, elem >>= 1, ++ch)
+	  if (__glibc_unlikely (elem & 1))
+	    {
+	      /* There must be exactly one destination which accepts
+		 character ch.  See group_nodes_into_DFAstates.  */
+	      for (j = 0; (dests_ch[j][i] & mask) == 0; ++j)
+		;
+
+	      /* j-th destination accepts the word character ch.  */
+	      trtable[ch] = dest_states[j];
+	      trtable[ch + SBC_MAX] = dest_states_word[j];
+	    }
+    }
+
+  /* new line */
+  if (bitset_contain (acceptable, NEWLINE_CHAR))
+    {
+      /* The current state accepts newline character.  */
+      for (j = 0; j < ndests; ++j)
+	if (bitset_contain (dests_ch[j], NEWLINE_CHAR))
+	  {
+	    /* k-th destination accepts newline character.  */
+	    trtable[NEWLINE_CHAR] = dest_states_nl[j];
+	    if (need_word_trtable)
+	      trtable[NEWLINE_CHAR + SBC_MAX] = dest_states_nl[j];
+	    /* There must be only one destination which accepts
+	       newline.  See group_nodes_into_DFAstates.  */
+	    break;
+	  }
+    }
+
+  re_node_set_free (&follows);
+  for (i = 0; i < ndests; ++i)
+    re_node_set_free (dests_node + i);
+  return true;
+}
+
+/* Group all nodes belonging to STATE into several destinations.
+   Then for all destinations, set the nodes belonging to the destination
+   to DESTS_NODE[i] and set the characters accepted by the destination
+   to DEST_CH[i].  Return the number of destinations if successful,
+   -1 on internal error.  */
+
+static Idx
+group_nodes_into_DFAstates (const re_dfa_t *dfa, const re_dfastate_t *state,
+			    re_node_set *dests_node, bitset_t *dests_ch)
+{
+  reg_errcode_t err;
+  bool ok;
+  Idx i, j, k;
+  Idx ndests; /* Number of the destinations from 'state'.  */
+  bitset_t accepts; /* Characters a node can accept.  */
+  const re_node_set *cur_nodes = &state->nodes;
+  bitset_empty (accepts);
+  ndests = 0;
+
+  /* For all the nodes belonging to 'state',  */
+  for (i = 0; i < cur_nodes->nelem; ++i)
+    {
+      re_token_t *node = &dfa->nodes[cur_nodes->elems[i]];
+      re_token_type_t type = node->type;
+      unsigned int constraint = node->constraint;
+
+      /* Enumerate all single byte character this node can accept.  */
+      if (type == CHARACTER)
+	bitset_set (accepts, node->opr.c);
+      else if (type == SIMPLE_BRACKET)
+	{
+	  bitset_merge (accepts, node->opr.sbcset);
+	}
+      else if (type == OP_PERIOD)
+	{
+#ifdef RE_ENABLE_I18N
+	  if (dfa->mb_cur_max > 1)
+	    bitset_merge (accepts, dfa->sb_char);
+	  else
+#endif
+	    bitset_set_all (accepts);
+	  if (!(dfa->syntax & RE_DOT_NEWLINE))
+	    bitset_clear (accepts, '\n');
+	  if (dfa->syntax & RE_DOT_NOT_NULL)
+	    bitset_clear (accepts, '\0');
+	}
+#ifdef RE_ENABLE_I18N
+      else if (type == OP_UTF8_PERIOD)
+	{
+	  if (ASCII_CHARS % BITSET_WORD_BITS == 0)
+	    memset (accepts, -1, ASCII_CHARS / CHAR_BIT);
+	  else
+	    bitset_merge (accepts, utf8_sb_map);
+	  if (!(dfa->syntax & RE_DOT_NEWLINE))
+	    bitset_clear (accepts, '\n');
+	  if (dfa->syntax & RE_DOT_NOT_NULL)
+	    bitset_clear (accepts, '\0');
+	}
+#endif
+      else
+	continue;
+
+      /* Check the 'accepts' and sift the characters which are not
+	 match it the context.  */
+      if (constraint)
+	{
+	  if (constraint & NEXT_NEWLINE_CONSTRAINT)
+	    {
+	      bool accepts_newline = bitset_contain (accepts, NEWLINE_CHAR);
+	      bitset_empty (accepts);
+	      if (accepts_newline)
+		bitset_set (accepts, NEWLINE_CHAR);
+	      else
+		continue;
+	    }
+	  if (constraint & NEXT_ENDBUF_CONSTRAINT)
+	    {
+	      bitset_empty (accepts);
+	      continue;
+	    }
+
+	  if (constraint & NEXT_WORD_CONSTRAINT)
+	    {
+	      bitset_word_t any_set = 0;
+	      if (type == CHARACTER && !node->word_char)
+		{
+		  bitset_empty (accepts);
+		  continue;
+		}
+#ifdef RE_ENABLE_I18N
+	      if (dfa->mb_cur_max > 1)
+		for (j = 0; j < BITSET_WORDS; ++j)
+		  any_set |= (accepts[j] &= (dfa->word_char[j] | ~dfa->sb_char[j]));
+	      else
+#endif
+		for (j = 0; j < BITSET_WORDS; ++j)
+		  any_set |= (accepts[j] &= dfa->word_char[j]);
+	      if (!any_set)
+		continue;
+	    }
+	  if (constraint & NEXT_NOTWORD_CONSTRAINT)
+	    {
+	      bitset_word_t any_set = 0;
+	      if (type == CHARACTER && node->word_char)
+		{
+		  bitset_empty (accepts);
+		  continue;
+		}
+#ifdef RE_ENABLE_I18N
+	      if (dfa->mb_cur_max > 1)
+		for (j = 0; j < BITSET_WORDS; ++j)
+		  any_set |= (accepts[j] &= ~(dfa->word_char[j] & dfa->sb_char[j]));
+	      else
+#endif
+		for (j = 0; j < BITSET_WORDS; ++j)
+		  any_set |= (accepts[j] &= ~dfa->word_char[j]);
+	      if (!any_set)
+		continue;
+	    }
+	}
+
+      /* Then divide 'accepts' into DFA states, or create a new
+	 state.  Above, we make sure that accepts is not empty.  */
+      for (j = 0; j < ndests; ++j)
+	{
+	  bitset_t intersec; /* Intersection sets, see below.  */
+	  bitset_t remains;
+	  /* Flags, see below.  */
+	  bitset_word_t has_intersec, not_subset, not_consumed;
+
+	  /* Optimization, skip if this state doesn't accept the character.  */
+	  if (type == CHARACTER && !bitset_contain (dests_ch[j], node->opr.c))
+	    continue;
+
+	  /* Enumerate the intersection set of this state and 'accepts'.  */
+	  has_intersec = 0;
+	  for (k = 0; k < BITSET_WORDS; ++k)
+	    has_intersec |= intersec[k] = accepts[k] & dests_ch[j][k];
+	  /* And skip if the intersection set is empty.  */
+	  if (!has_intersec)
+	    continue;
+
+	  /* Then check if this state is a subset of 'accepts'.  */
+	  not_subset = not_consumed = 0;
+	  for (k = 0; k < BITSET_WORDS; ++k)
+	    {
+	      not_subset |= remains[k] = ~accepts[k] & dests_ch[j][k];
+	      not_consumed |= accepts[k] = accepts[k] & ~dests_ch[j][k];
+	    }
+
+	  /* If this state isn't a subset of 'accepts', create a
+	     new group state, which has the 'remains'. */
+	  if (not_subset)
+	    {
+	      bitset_copy (dests_ch[ndests], remains);
+	      bitset_copy (dests_ch[j], intersec);
+	      err = re_node_set_init_copy (dests_node + ndests, &dests_node[j]);
+	      if (__glibc_unlikely (err != REG_NOERROR))
+		goto error_return;
+	      ++ndests;
+	    }
+
+	  /* Put the position in the current group. */
+	  ok = re_node_set_insert (&dests_node[j], cur_nodes->elems[i]);
+	  if (__glibc_unlikely (! ok))
+	    goto error_return;
+
+	  /* If all characters are consumed, go to next node. */
+	  if (!not_consumed)
+	    break;
+	}
+      /* Some characters remain, create a new group. */
+      if (j == ndests)
+	{
+	  bitset_copy (dests_ch[ndests], accepts);
+	  err = re_node_set_init_1 (dests_node + ndests, cur_nodes->elems[i]);
+	  if (__glibc_unlikely (err != REG_NOERROR))
+	    goto error_return;
+	  ++ndests;
+	  bitset_empty (accepts);
+	}
+    }
+  assume (ndests <= SBC_MAX);
+  return ndests;
+ error_return:
+  for (j = 0; j < ndests; ++j)
+    re_node_set_free (dests_node + j);
+  return -1;
+}
+
+#ifdef RE_ENABLE_I18N
+/* Check how many bytes the node 'dfa->nodes[node_idx]' accepts.
+   Return the number of the bytes the node accepts.
+   STR_IDX is the current index of the input string.
+
+   This function handles the nodes which can accept one character, or
+   one collating element like '.', '[a-z]', opposite to the other nodes
+   can only accept one byte.  */
+
+# ifdef _LIBC
+#  include <locale/weight.h>
+# endif
+
+static int
+check_node_accept_bytes (const re_dfa_t *dfa, Idx node_idx,
+			 const re_string_t *input, Idx str_idx)
+{
+  const re_token_t *node = dfa->nodes + node_idx;
+  int char_len, elem_len;
+  Idx i;
+
+  if (__glibc_unlikely (node->type == OP_UTF8_PERIOD))
+    {
+      unsigned char c = re_string_byte_at (input, str_idx), d;
+      if (__glibc_likely (c < 0xc2))
+	return 0;
+
+      if (str_idx + 2 > input->len)
+	return 0;
+
+      d = re_string_byte_at (input, str_idx + 1);
+      if (c < 0xe0)
+	return (d < 0x80 || d > 0xbf) ? 0 : 2;
+      else if (c < 0xf0)
+	{
+	  char_len = 3;
+	  if (c == 0xe0 && d < 0xa0)
+	    return 0;
+	}
+      else if (c < 0xf8)
+	{
+	  char_len = 4;
+	  if (c == 0xf0 && d < 0x90)
+	    return 0;
+	}
+      else if (c < 0xfc)
+	{
+	  char_len = 5;
+	  if (c == 0xf8 && d < 0x88)
+	    return 0;
+	}
+      else if (c < 0xfe)
+	{
+	  char_len = 6;
+	  if (c == 0xfc && d < 0x84)
+	    return 0;
+	}
+      else
+	return 0;
+
+      if (str_idx + char_len > input->len)
+	return 0;
+
+      for (i = 1; i < char_len; ++i)
+	{
+	  d = re_string_byte_at (input, str_idx + i);
+	  if (d < 0x80 || d > 0xbf)
+	    return 0;
+	}
+      return char_len;
+    }
+
+  char_len = re_string_char_size_at (input, str_idx);
+  if (node->type == OP_PERIOD)
+    {
+      if (char_len <= 1)
+	return 0;
+      /* FIXME: I don't think this if is needed, as both '\n'
+	 and '\0' are char_len == 1.  */
+      /* '.' accepts any one character except the following two cases.  */
+      if ((!(dfa->syntax & RE_DOT_NEWLINE)
+	   && re_string_byte_at (input, str_idx) == '\n')
+	  || ((dfa->syntax & RE_DOT_NOT_NULL)
+	      && re_string_byte_at (input, str_idx) == '\0'))
+	return 0;
+      return char_len;
+    }
+
+  elem_len = re_string_elem_size_at (input, str_idx);
+  if ((elem_len <= 1 && char_len <= 1) || char_len == 0)
+    return 0;
+
+  if (node->type == COMPLEX_BRACKET)
+    {
+      const re_charset_t *cset = node->opr.mbcset;
+# ifdef _LIBC
+      const unsigned char *pin
+	= ((const unsigned char *) re_string_get_buffer (input) + str_idx);
+      Idx j;
+      uint32_t nrules;
+# endif /* _LIBC */
+      int match_len = 0;
+      wchar_t wc = ((cset->nranges || cset->nchar_classes || cset->nmbchars)
+		    ? re_string_wchar_at (input, str_idx) : 0);
+
+      /* match with multibyte character?  */
+      for (i = 0; i < cset->nmbchars; ++i)
+	if (wc == cset->mbchars[i])
+	  {
+	    match_len = char_len;
+	    goto check_node_accept_bytes_match;
+	  }
+      /* match with character_class?  */
+      for (i = 0; i < cset->nchar_classes; ++i)
+	{
+	  wctype_t wt = cset->char_classes[i];
+	  if (__iswctype (wc, wt))
+	    {
+	      match_len = char_len;
+	      goto check_node_accept_bytes_match;
+	    }
+	}
+
+# ifdef _LIBC
+      nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
+      if (nrules != 0)
+	{
+	  unsigned int in_collseq = 0;
+	  const int32_t *table, *indirect;
+	  const unsigned char *weights, *extra;
+	  const char *collseqwc;
+
+	  /* match with collating_symbol?  */
+	  if (cset->ncoll_syms)
+	    extra = (const unsigned char *)
+	      _NL_CURRENT (LC_COLLATE, _NL_COLLATE_SYMB_EXTRAMB);
+	  for (i = 0; i < cset->ncoll_syms; ++i)
+	    {
+	      const unsigned char *coll_sym = extra + cset->coll_syms[i];
+	      /* Compare the length of input collating element and
+		 the length of current collating element.  */
+	      if (*coll_sym != elem_len)
+		continue;
+	      /* Compare each bytes.  */
+	      for (j = 0; j < *coll_sym; j++)
+		if (pin[j] != coll_sym[1 + j])
+		  break;
+	      if (j == *coll_sym)
+		{
+		  /* Match if every bytes is equal.  */
+		  match_len = j;
+		  goto check_node_accept_bytes_match;
+		}
+	    }
+
+	  if (cset->nranges)
+	    {
+	      if (elem_len <= char_len)
+		{
+		  collseqwc = _NL_CURRENT (LC_COLLATE, _NL_COLLATE_COLLSEQWC);
+		  in_collseq = __collseq_table_lookup (collseqwc, wc);
+		}
+	      else
+		in_collseq = find_collation_sequence_value (pin, elem_len);
+	    }
+	  /* match with range expression?  */
+	  /* FIXME: Implement rational ranges here, too.  */
+	  for (i = 0; i < cset->nranges; ++i)
+	    if (cset->range_starts[i] <= in_collseq
+		&& in_collseq <= cset->range_ends[i])
+	      {
+		match_len = elem_len;
+		goto check_node_accept_bytes_match;
+	      }
+
+	  /* match with equivalence_class?  */
+	  if (cset->nequiv_classes)
+	    {
+	      const unsigned char *cp = pin;
+	      table = (const int32_t *)
+		_NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEMB);
+	      weights = (const unsigned char *)
+		_NL_CURRENT (LC_COLLATE, _NL_COLLATE_WEIGHTMB);
+	      extra = (const unsigned char *)
+		_NL_CURRENT (LC_COLLATE, _NL_COLLATE_EXTRAMB);
+	      indirect = (const int32_t *)
+		_NL_CURRENT (LC_COLLATE, _NL_COLLATE_INDIRECTMB);
+	      int32_t idx = findidx (table, indirect, extra, &cp, elem_len);
+	      int32_t rule = idx >> 24;
+	      idx &= 0xffffff;
+	      if (idx > 0)
+		{
+		  size_t weight_len = weights[idx];
+		  for (i = 0; i < cset->nequiv_classes; ++i)
+		    {
+		      int32_t equiv_class_idx = cset->equiv_classes[i];
+		      int32_t equiv_class_rule = equiv_class_idx >> 24;
+		      equiv_class_idx &= 0xffffff;
+		      if (weights[equiv_class_idx] == weight_len
+			  && equiv_class_rule == rule
+			  && memcmp (weights + idx + 1,
+				     weights + equiv_class_idx + 1,
+				     weight_len) == 0)
+			{
+			  match_len = elem_len;
+			  goto check_node_accept_bytes_match;
+			}
+		    }
+		}
+	    }
+	}
+      else
+# endif /* _LIBC */
+	{
+	  /* match with range expression?  */
+	  for (i = 0; i < cset->nranges; ++i)
+	    {
+	      if (cset->range_starts[i] <= wc && wc <= cset->range_ends[i])
+		{
+		  match_len = char_len;
+		  goto check_node_accept_bytes_match;
+		}
+	    }
+	}
+    check_node_accept_bytes_match:
+      if (!cset->non_match)
+	return match_len;
+      else
+	{
+	  if (match_len > 0)
+	    return 0;
+	  else
+	    return (elem_len > char_len) ? elem_len : char_len;
+	}
+    }
+  return 0;
+}
+
+# ifdef _LIBC
+static unsigned int
+find_collation_sequence_value (const unsigned char *mbs, size_t mbs_len)
+{
+  uint32_t nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
+  if (nrules == 0)
+    {
+      if (mbs_len == 1)
+	{
+	  /* No valid character.  Match it as a single byte character.  */
+	  const unsigned char *collseq = (const unsigned char *)
+	    _NL_CURRENT (LC_COLLATE, _NL_COLLATE_COLLSEQMB);
+	  return collseq[mbs[0]];
+	}
+      return UINT_MAX;
+    }
+  else
+    {
+      int32_t idx;
+      const unsigned char *extra = (const unsigned char *)
+	_NL_CURRENT (LC_COLLATE, _NL_COLLATE_SYMB_EXTRAMB);
+      int32_t extrasize = (const unsigned char *)
+	_NL_CURRENT (LC_COLLATE, _NL_COLLATE_SYMB_EXTRAMB + 1) - extra;
+
+      for (idx = 0; idx < extrasize;)
+	{
+	  int mbs_cnt;
+	  bool found = false;
+	  int32_t elem_mbs_len;
+	  /* Skip the name of collating element name.  */
+	  idx = idx + extra[idx] + 1;
+	  elem_mbs_len = extra[idx++];
+	  if (mbs_len == elem_mbs_len)
+	    {
+	      for (mbs_cnt = 0; mbs_cnt < elem_mbs_len; ++mbs_cnt)
+		if (extra[idx + mbs_cnt] != mbs[mbs_cnt])
+		  break;
+	      if (mbs_cnt == elem_mbs_len)
+		/* Found the entry.  */
+		found = true;
+	    }
+	  /* Skip the byte sequence of the collating element.  */
+	  idx += elem_mbs_len;
+	  /* Adjust for the alignment.  */
+	  idx = (idx + 3) & ~3;
+	  /* Skip the collation sequence value.  */
+	  idx += sizeof (uint32_t);
+	  /* Skip the wide char sequence of the collating element.  */
+	  idx = idx + sizeof (uint32_t) * (*(int32_t *) (extra + idx) + 1);
+	  /* If we found the entry, return the sequence value.  */
+	  if (found)
+	    return *(uint32_t *) (extra + idx);
+	  /* Skip the collation sequence value.  */
+	  idx += sizeof (uint32_t);
+	}
+      return UINT_MAX;
+    }
+}
+# endif /* _LIBC */
+#endif /* RE_ENABLE_I18N */
+
+/* Check whether the node accepts the byte which is IDX-th
+   byte of the INPUT.  */
+
+static bool
+check_node_accept (const re_match_context_t *mctx, const re_token_t *node,
+		   Idx idx)
+{
+  unsigned char ch;
+  ch = re_string_byte_at (&mctx->input, idx);
+  switch (node->type)
+    {
+    case CHARACTER:
+      if (node->opr.c != ch)
+        return false;
+      break;
+
+    case SIMPLE_BRACKET:
+      if (!bitset_contain (node->opr.sbcset, ch))
+        return false;
+      break;
+
+#ifdef RE_ENABLE_I18N
+    case OP_UTF8_PERIOD:
+      if (ch >= ASCII_CHARS)
+        return false;
+      FALLTHROUGH;
+#endif
+    case OP_PERIOD:
+      if ((ch == '\n' && !(mctx->dfa->syntax & RE_DOT_NEWLINE))
+	  || (ch == '\0' && (mctx->dfa->syntax & RE_DOT_NOT_NULL)))
+	return false;
+      break;
+
+    default:
+      return false;
+    }
+
+  if (node->constraint)
+    {
+      /* The node has constraints.  Check whether the current context
+	 satisfies the constraints.  */
+      unsigned int context = re_string_context_at (&mctx->input, idx,
+						   mctx->eflags);
+      if (NOT_SATISFY_NEXT_CONSTRAINT (node->constraint, context))
+	return false;
+    }
+
+  return true;
+}
+
+/* Extend the buffers, if the buffers have run out.  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+extend_buffers (re_match_context_t *mctx, int min_len)
+{
+  reg_errcode_t ret;
+  re_string_t *pstr = &mctx->input;
+
+  /* Avoid overflow.  */
+  if (__glibc_unlikely (MIN (IDX_MAX, SIZE_MAX / sizeof (re_dfastate_t *)) / 2
+			<= pstr->bufs_len))
+    return REG_ESPACE;
+
+  /* Double the lengths of the buffers, but allocate at least MIN_LEN.  */
+  ret = re_string_realloc_buffers (pstr,
+				   MAX (min_len,
+					MIN (pstr->len, pstr->bufs_len * 2)));
+  if (__glibc_unlikely (ret != REG_NOERROR))
+    return ret;
+
+  if (mctx->state_log != NULL)
+    {
+      /* And double the length of state_log.  */
+      /* XXX We have no indication of the size of this buffer.  If this
+	 allocation fail we have no indication that the state_log array
+	 does not have the right size.  */
+      re_dfastate_t **new_array = re_realloc (mctx->state_log, re_dfastate_t *,
+					      pstr->bufs_len + 1);
+      if (__glibc_unlikely (new_array == NULL))
+	return REG_ESPACE;
+      mctx->state_log = new_array;
+    }
+
+  /* Then reconstruct the buffers.  */
+  if (pstr->icase)
+    {
+#ifdef RE_ENABLE_I18N
+      if (pstr->mb_cur_max > 1)
+	{
+	  ret = build_wcs_upper_buffer (pstr);
+	  if (__glibc_unlikely (ret != REG_NOERROR))
+	    return ret;
+	}
+      else
+#endif /* RE_ENABLE_I18N  */
+	build_upper_buffer (pstr);
+    }
+  else
+    {
+#ifdef RE_ENABLE_I18N
+      if (pstr->mb_cur_max > 1)
+	build_wcs_buffer (pstr);
+      else
+#endif /* RE_ENABLE_I18N  */
+	{
+	  if (pstr->trans != NULL)
+	    re_string_translate_buffer (pstr);
+	}
+    }
+  return REG_NOERROR;
+}
+
+
+/* Functions for matching context.  */
+
+/* Initialize MCTX.  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+match_ctx_init (re_match_context_t *mctx, int eflags, Idx n)
+{
+  mctx->eflags = eflags;
+  mctx->match_last = -1;
+  if (n > 0)
+    {
+      /* Avoid overflow.  */
+      size_t max_object_size =
+	MAX (sizeof (struct re_backref_cache_entry),
+	     sizeof (re_sub_match_top_t *));
+      if (__glibc_unlikely (MIN (IDX_MAX, SIZE_MAX / max_object_size) < n))
+	return REG_ESPACE;
+
+      mctx->bkref_ents = re_malloc (struct re_backref_cache_entry, n);
+      mctx->sub_tops = re_malloc (re_sub_match_top_t *, n);
+      if (__glibc_unlikely (mctx->bkref_ents == NULL || mctx->sub_tops == NULL))
+	return REG_ESPACE;
+    }
+  /* Already zero-ed by the caller.
+     else
+       mctx->bkref_ents = NULL;
+     mctx->nbkref_ents = 0;
+     mctx->nsub_tops = 0;  */
+  mctx->abkref_ents = n;
+  mctx->max_mb_elem_len = 1;
+  mctx->asub_tops = n;
+  return REG_NOERROR;
+}
+
+/* Clean the entries which depend on the current input in MCTX.
+   This function must be invoked when the matcher changes the start index
+   of the input, or changes the input string.  */
+
+static void
+match_ctx_clean (re_match_context_t *mctx)
+{
+  Idx st_idx;
+  for (st_idx = 0; st_idx < mctx->nsub_tops; ++st_idx)
+    {
+      Idx sl_idx;
+      re_sub_match_top_t *top = mctx->sub_tops[st_idx];
+      for (sl_idx = 0; sl_idx < top->nlasts; ++sl_idx)
+	{
+	  re_sub_match_last_t *last = top->lasts[sl_idx];
+	  re_free (last->path.array);
+	  re_free (last);
+	}
+      re_free (top->lasts);
+      if (top->path)
+	{
+	  re_free (top->path->array);
+	  re_free (top->path);
+	}
+      re_free (top);
+    }
+
+  mctx->nsub_tops = 0;
+  mctx->nbkref_ents = 0;
+}
+
+/* Free all the memory associated with MCTX.  */
+
+static void
+match_ctx_free (re_match_context_t *mctx)
+{
+  /* First, free all the memory associated with MCTX->SUB_TOPS.  */
+  match_ctx_clean (mctx);
+  re_free (mctx->sub_tops);
+  re_free (mctx->bkref_ents);
+}
+
+/* Add a new backreference entry to MCTX.
+   Note that we assume that caller never call this function with duplicate
+   entry, and call with STR_IDX which isn't smaller than any existing entry.
+*/
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+match_ctx_add_entry (re_match_context_t *mctx, Idx node, Idx str_idx, Idx from,
+		     Idx to)
+{
+  if (mctx->nbkref_ents >= mctx->abkref_ents)
+    {
+      struct re_backref_cache_entry* new_entry;
+      new_entry = re_realloc (mctx->bkref_ents, struct re_backref_cache_entry,
+			      mctx->abkref_ents * 2);
+      if (__glibc_unlikely (new_entry == NULL))
+	{
+	  re_free (mctx->bkref_ents);
+	  return REG_ESPACE;
+	}
+      mctx->bkref_ents = new_entry;
+      memset (mctx->bkref_ents + mctx->nbkref_ents, '\0',
+	      sizeof (struct re_backref_cache_entry) * mctx->abkref_ents);
+      mctx->abkref_ents *= 2;
+    }
+  if (mctx->nbkref_ents > 0
+      && mctx->bkref_ents[mctx->nbkref_ents - 1].str_idx == str_idx)
+    mctx->bkref_ents[mctx->nbkref_ents - 1].more = 1;
+
+  mctx->bkref_ents[mctx->nbkref_ents].node = node;
+  mctx->bkref_ents[mctx->nbkref_ents].str_idx = str_idx;
+  mctx->bkref_ents[mctx->nbkref_ents].subexp_from = from;
+  mctx->bkref_ents[mctx->nbkref_ents].subexp_to = to;
+
+  /* This is a cache that saves negative results of check_dst_limits_calc_pos.
+     If bit N is clear, means that this entry won't epsilon-transition to
+     an OP_OPEN_SUBEXP or OP_CLOSE_SUBEXP for the N+1-th subexpression.  If
+     it is set, check_dst_limits_calc_pos_1 will recurse and try to find one
+     such node.
+
+     A backreference does not epsilon-transition unless it is empty, so set
+     to all zeros if FROM != TO.  */
+  mctx->bkref_ents[mctx->nbkref_ents].eps_reachable_subexps_map
+    = (from == to ? -1 : 0);
+
+  mctx->bkref_ents[mctx->nbkref_ents++].more = 0;
+  if (mctx->max_mb_elem_len < to - from)
+    mctx->max_mb_elem_len = to - from;
+  return REG_NOERROR;
+}
+
+/* Return the first entry with the same str_idx, or -1 if none is
+   found.  Note that MCTX->BKREF_ENTS is already sorted by MCTX->STR_IDX.  */
+
+static Idx
+search_cur_bkref_entry (const re_match_context_t *mctx, Idx str_idx)
+{
+  Idx left, right, mid, last;
+  last = right = mctx->nbkref_ents;
+  for (left = 0; left < right;)
+    {
+      mid = (left + right) / 2;
+      if (mctx->bkref_ents[mid].str_idx < str_idx)
+	left = mid + 1;
+      else
+	right = mid;
+    }
+  if (left < last && mctx->bkref_ents[left].str_idx == str_idx)
+    return left;
+  else
+    return -1;
+}
+
+/* Register the node NODE, whose type is OP_OPEN_SUBEXP, and which matches
+   at STR_IDX.  */
+
+static reg_errcode_t
+__attribute_warn_unused_result__
+match_ctx_add_subtop (re_match_context_t *mctx, Idx node, Idx str_idx)
+{
+  DEBUG_ASSERT (mctx->sub_tops != NULL);
+  DEBUG_ASSERT (mctx->asub_tops > 0);
+  if (__glibc_unlikely (mctx->nsub_tops == mctx->asub_tops))
+    {
+      Idx new_asub_tops = mctx->asub_tops * 2;
+      re_sub_match_top_t **new_array = re_realloc (mctx->sub_tops,
+						   re_sub_match_top_t *,
+						   new_asub_tops);
+      if (__glibc_unlikely (new_array == NULL))
+	return REG_ESPACE;
+      mctx->sub_tops = new_array;
+      mctx->asub_tops = new_asub_tops;
+    }
+  mctx->sub_tops[mctx->nsub_tops] = calloc (1, sizeof (re_sub_match_top_t));
+  if (__glibc_unlikely (mctx->sub_tops[mctx->nsub_tops] == NULL))
+    return REG_ESPACE;
+  mctx->sub_tops[mctx->nsub_tops]->node = node;
+  mctx->sub_tops[mctx->nsub_tops++]->str_idx = str_idx;
+  return REG_NOERROR;
+}
+
+/* Register the node NODE, whose type is OP_CLOSE_SUBEXP, and which matches
+   at STR_IDX, whose corresponding OP_OPEN_SUBEXP is SUB_TOP.
+   Return the new entry if successful, NULL if memory is exhausted.  */
+
+static re_sub_match_last_t *
+match_ctx_add_sublast (re_sub_match_top_t *subtop, Idx node, Idx str_idx)
+{
+  re_sub_match_last_t *new_entry;
+  if (__glibc_unlikely (subtop->nlasts == subtop->alasts))
+    {
+      Idx new_alasts = 2 * subtop->alasts + 1;
+      re_sub_match_last_t **new_array = re_realloc (subtop->lasts,
+						    re_sub_match_last_t *,
+						    new_alasts);
+      if (__glibc_unlikely (new_array == NULL))
+	return NULL;
+      subtop->lasts = new_array;
+      subtop->alasts = new_alasts;
+    }
+  new_entry = calloc (1, sizeof (re_sub_match_last_t));
+  if (__glibc_likely (new_entry != NULL))
+    {
+      subtop->lasts[subtop->nlasts] = new_entry;
+      new_entry->node = node;
+      new_entry->str_idx = str_idx;
+      ++subtop->nlasts;
+    }
+  return new_entry;
+}
+
+static void
+sift_ctx_init (re_sift_context_t *sctx, re_dfastate_t **sifted_sts,
+	       re_dfastate_t **limited_sts, Idx last_node, Idx last_str_idx)
+{
+  sctx->sifted_states = sifted_sts;
+  sctx->limited_states = limited_sts;
+  sctx->last_node = last_node;
+  sctx->last_str_idx = last_str_idx;
+  re_node_set_init_empty (&sctx->limits);
+}
diff --git a/src/grep/lib/safe-read.c b/src/grep/lib/safe-read.c
new file mode 100644
index 0000000..e187b12
--- /dev/null
+++ b/src/grep/lib/safe-read.c
@@ -0,0 +1,71 @@
+/* An interface to read and write that retries after interrupts.
+
+   Copyright (C) 1993-1994, 1998, 2002-2006, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#ifdef SAFE_WRITE
+# include "safe-write.h"
+#else
+# include "safe-read.h"
+#endif
+
+/* Get ssize_t.  */
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <errno.h>
+
+#ifdef EINTR
+# define IS_EINTR(x) ((x) == EINTR)
+#else
+# define IS_EINTR(x) 0
+#endif
+
+#include "sys-limits.h"
+
+#ifdef SAFE_WRITE
+# define safe_rw safe_write
+# define rw write
+#else
+# define safe_rw safe_read
+# define rw read
+# undef const
+# define const /* empty */
+#endif
+
+/* Read(write) up to COUNT bytes at BUF from(to) descriptor FD, retrying if
+   interrupted.  Return the actual number of bytes read(written), zero for EOF,
+   or SAFE_READ_ERROR(SAFE_WRITE_ERROR) upon error.  */
+size_t
+safe_rw (int fd, void const *buf, size_t count)
+{
+  for (;;)
+    {
+      ssize_t result = rw (fd, buf, count);
+
+      if (0 <= result)
+        return result;
+      else if (IS_EINTR (errno))
+        continue;
+      else if (errno == EINVAL && SYS_BUFSIZE_MAX < count)
+        count = SYS_BUFSIZE_MAX;
+      else
+        return result;
+    }
+}
diff --git a/src/grep/lib/safe-read.h b/src/grep/lib/safe-read.h
new file mode 100644
index 0000000..111aff5
--- /dev/null
+++ b/src/grep/lib/safe-read.h
@@ -0,0 +1,47 @@
+/* An interface to read() that retries after interrupts.
+   Copyright (C) 2002, 2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Some system calls may be interrupted and fail with errno = EINTR in the
+   following situations:
+     - The process is stopped and restarted (signal SIGSTOP and SIGCONT, user
+       types Ctrl-Z) on some platforms: Mac OS X.
+     - The process receives a signal for which a signal handler was installed
+       with sigaction() with an sa_flags field that does not contain
+       SA_RESTART.
+     - The process receives a signal for which a signal handler was installed
+       with signal() and for which no call to siginterrupt(sig,0) was done,
+       on some platforms: AIX, HP-UX, IRIX, OSF/1, Solaris.
+
+   This module provides a wrapper around read() that handles EINTR.  */
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+#define SAFE_READ_ERROR ((size_t) -1)
+
+/* Read up to COUNT bytes at BUF from descriptor FD, retrying if interrupted.
+   Return the actual number of bytes read, zero for EOF, or SAFE_READ_ERROR
+   upon error.  */
+extern size_t safe_read (int fd, void *buf, size_t count);
+
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/src/grep/lib/same-inode.h b/src/grep/lib/same-inode.h
new file mode 100644
index 0000000..c727777
--- /dev/null
+++ b/src/grep/lib/same-inode.h
@@ -0,0 +1,47 @@
+/* Determine whether two stat buffers are known to refer to the same file.
+
+   Copyright (C) 2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef SAME_INODE_H
+# define SAME_INODE_H 1
+
+# include <sys/types.h>
+
+# if defined __VMS && __CRTL_VER < 80200000
+#  define SAME_INODE(a, b)             \
+    ((a).st_ino[0] == (b).st_ino[0]    \
+     && (a).st_ino[1] == (b).st_ino[1] \
+     && (a).st_ino[2] == (b).st_ino[2] \
+     && (a).st_dev == (b).st_dev)
+# elif defined _WIN32 && ! defined __CYGWIN__
+   /* Native Windows.  */
+#  if _GL_WINDOWS_STAT_INODES
+    /* stat() and fstat() set st_dev and st_ino to 0 if information about
+       the inode is not available.  */
+#   define SAME_INODE(a, b) \
+     (!((a).st_ino == 0 && (a).st_dev == 0) \
+      && (a).st_ino == (b).st_ino && (a).st_dev == (b).st_dev)
+#  else
+    /* stat() and fstat() set st_ino to 0 always.  */
+#   define SAME_INODE(a, b) 0
+#  endif
+# else
+#  define SAME_INODE(a, b)    \
+    ((a).st_ino == (b).st_ino \
+     && (a).st_dev == (b).st_dev)
+# endif
+
+#endif
diff --git a/src/grep/lib/save-cwd.c b/src/grep/lib/save-cwd.c
new file mode 100644
index 0000000..0a18bc5
--- /dev/null
+++ b/src/grep/lib/save-cwd.c
@@ -0,0 +1,97 @@
+/* save-cwd.c -- Save and restore current working directory.
+
+   Copyright (C) 1995, 1997-1998, 2003-2006, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering.  */
+
+#include <config.h>
+
+#include "save-cwd.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "chdir-long.h"
+#include "unistd--.h"
+
+#if GNULIB_FCNTL_SAFER
+# include "fcntl--.h"
+#else
+# define GNULIB_FCNTL_SAFER 0
+#endif
+
+/* Record the location of the current working directory in CWD so that
+   the program may change to other directories and later use restore_cwd
+   to return to the recorded location.  This function may allocate
+   space using malloc (via getcwd) or leave a file descriptor open;
+   use free_cwd to perform the necessary free or close.  Upon failure,
+   no memory is allocated, any locally opened file descriptors are
+   closed;  return non-zero -- in that case, free_cwd need not be
+   called, but doing so is ok.  Otherwise, return zero.
+
+   The _raison d'etre_ for this interface is that the working directory
+   is sometimes inaccessible, and getcwd is not robust or as efficient.
+   So, we prefer to use the open/fchdir approach, but fall back on
+   getcwd if necessary.  This module works for most cases with just
+   the getcwd-lgpl module, but to be truly robust, use the getcwd module.
+
+   Some systems lack fchdir altogether: e.g., OS/2, pre-2001 Cygwin,
+   SCO Xenix.  Also, SunOS 4 and Irix 5.3 provide the function, yet it
+   doesn't work for partitions on which auditing is enabled.  If
+   you're still using an obsolete system with these problems, please
+   send email to the maintainer of this code.  */
+
+int
+save_cwd (struct saved_cwd *cwd)
+{
+  cwd->name = NULL;
+
+  cwd->desc = open (".", O_SEARCH | O_CLOEXEC);
+  if (!GNULIB_FCNTL_SAFER)
+    cwd->desc = fd_safer_flag (cwd->desc, O_CLOEXEC);
+  if (cwd->desc < 0)
+    {
+      cwd->name = getcwd (NULL, 0);
+      return cwd->name ? 0 : -1;
+    }
+
+  return 0;
+}
+
+/* Change to recorded location, CWD, in directory hierarchy.
+   Upon failure, return -1 (errno is set by chdir or fchdir).
+   Upon success, return zero.  */
+
+int
+restore_cwd (const struct saved_cwd *cwd)
+{
+  if (0 <= cwd->desc)
+    return fchdir (cwd->desc);
+  else
+    return chdir_long (cwd->name);
+}
+
+void
+free_cwd (struct saved_cwd *cwd)
+{
+  if (cwd->desc >= 0)
+    close (cwd->desc);
+  free (cwd->name);
+}
diff --git a/src/grep/lib/save-cwd.h b/src/grep/lib/save-cwd.h
new file mode 100644
index 0000000..3cefba5
--- /dev/null
+++ b/src/grep/lib/save-cwd.h
@@ -0,0 +1,34 @@
+/* Save and restore current working directory.
+
+   Copyright (C) 1995, 1997-1998, 2003, 2009-2021 Free Software Foundation,
+   Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering.  */
+
+#ifndef SAVE_CWD_H
+# define SAVE_CWD_H 1
+
+struct saved_cwd
+  {
+    int desc;
+    char *name;
+  };
+
+int save_cwd (struct saved_cwd *cwd);
+int restore_cwd (const struct saved_cwd *cwd);
+void free_cwd (struct saved_cwd *cwd);
+
+#endif /* SAVE_CWD_H */
diff --git a/src/grep/lib/setlocale-lock.c b/src/grep/lib/setlocale-lock.c
new file mode 100644
index 0000000..53e231c
--- /dev/null
+++ b/src/grep/lib/setlocale-lock.c
@@ -0,0 +1,150 @@
+/* Return the internal lock used by setlocale_null_r.
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+/* When it is known that the gl_get_setlocale_null_lock function is defined
+   by a dependency library, it should not be defined here.  */
+#if OMIT_SETLOCALE_LOCK
+
+/* This declaration is solely to ensure that after preprocessing
+   this file is never empty.  */
+typedef int dummy;
+
+#else
+
+/* This file defines the internal lock used by setlocale_null_r.
+   It is a separate compilation unit, so that only one copy of it is
+   present when linking statically.  */
+
+/* Prohibit renaming this symbol.  */
+# undef gl_get_setlocale_null_lock
+
+/* Macro for exporting a symbol (function, not variable) defined in this file,
+   when compiled into a shared library.  */
+# ifndef DLL_EXPORTED
+#  if HAVE_VISIBILITY
+  /* Override the effect of the compiler option '-fvisibility=hidden'.  */
+#   define DLL_EXPORTED __attribute__((__visibility__("default")))
+#  elif defined _WIN32 || defined __CYGWIN__
+#   define DLL_EXPORTED __declspec(dllexport)
+#  else
+#   define DLL_EXPORTED
+#  endif
+# endif
+
+# if defined _WIN32 && !defined __CYGWIN__
+
+#  define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#  include <windows.h>
+
+#  include "windows-initguard.h"
+
+/* The return type is a 'CRITICAL_SECTION *', not a 'glwthread_mutex_t *',
+   because the latter is not guaranteed to be a stable ABI in the future.  */
+
+/* Make sure the function gets exported from DLLs.  */
+DLL_EXPORTED CRITICAL_SECTION *gl_get_setlocale_null_lock (void);
+
+static glwthread_initguard_t guard = GLWTHREAD_INITGUARD_INIT;
+static CRITICAL_SECTION lock;
+
+/* Returns the internal lock used by setlocale_null_r.  */
+CRITICAL_SECTION *
+gl_get_setlocale_null_lock (void)
+{
+  if (!guard.done)
+    {
+      if (InterlockedIncrement (&guard.started) == 0)
+        {
+          /* This thread is the first one to need the lock.  Initialize it.  */
+          InitializeCriticalSection (&lock);
+          guard.done = 1;
+        }
+      else
+        {
+          /* Don't let guard.started grow and wrap around.  */
+          InterlockedDecrement (&guard.started);
+          /* Yield the CPU while waiting for another thread to finish
+             initializing this mutex.  */
+          while (!guard.done)
+            Sleep (0);
+        }
+    }
+  return &lock;
+}
+
+# elif HAVE_PTHREAD_API
+
+#  include <pthread.h>
+
+static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+
+/* Make sure the function gets exported from shared libraries.  */
+DLL_EXPORTED pthread_mutex_t *gl_get_setlocale_null_lock (void);
+
+/* Returns the internal lock used by setlocale_null_r.  */
+pthread_mutex_t *
+gl_get_setlocale_null_lock (void)
+{
+  return &mutex;
+}
+
+# elif HAVE_THREADS_H
+
+#  include <threads.h>
+#  include <stdlib.h>
+
+static int volatile init_needed = 1;
+static once_flag init_once = ONCE_FLAG_INIT;
+static mtx_t mutex;
+
+static void
+atomic_init (void)
+{
+  if (mtx_init (&mutex, mtx_plain) != thrd_success)
+    abort ();
+  init_needed = 0;
+}
+
+/* Make sure the function gets exported from shared libraries.  */
+DLL_EXPORTED mtx_t *gl_get_setlocale_null_lock (void);
+
+/* Returns the internal lock used by setlocale_null_r.  */
+mtx_t *
+gl_get_setlocale_null_lock (void)
+{
+  if (init_needed)
+    call_once (&init_once, atomic_init);
+  return &mutex;
+}
+
+# endif
+
+# if (defined _WIN32 || defined __CYGWIN__) && !defined _MSC_VER
+/* Make sure the '__declspec(dllimport)' in setlocale_null.c does not cause
+   a link failure when no DLLs are involved.  */
+#  if defined _WIN64 || defined _LP64
+#   define IMP(x) __imp_##x
+#  else
+#   define IMP(x) _imp__##x
+#  endif
+void * IMP(gl_get_setlocale_null_lock) = &gl_get_setlocale_null_lock;
+# endif
+
+#endif
diff --git a/src/grep/lib/setlocale_null.c b/src/grep/lib/setlocale_null.c
new file mode 100644
index 0000000..dbfda25
--- /dev/null
+++ b/src/grep/lib/setlocale_null.c
@@ -0,0 +1,411 @@
+/* Query the name of the current global locale.
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "setlocale_null.h"
+
+#include <errno.h>
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#if defined _WIN32 && !defined __CYGWIN__
+# include <wchar.h>
+#endif
+
+#if !(SETLOCALE_NULL_ALL_MTSAFE && SETLOCALE_NULL_ONE_MTSAFE)
+# if defined _WIN32 && !defined __CYGWIN__
+
+#  define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#  include <windows.h>
+
+# elif HAVE_PTHREAD_API
+
+#  include <pthread.h>
+#  if HAVE_THREADS_H && HAVE_WEAK_SYMBOLS
+#   include <threads.h>
+#   pragma weak thrd_exit
+#   define c11_threads_in_use() (thrd_exit != NULL)
+#  else
+#   define c11_threads_in_use() 0
+#  endif
+
+# elif HAVE_THREADS_H
+
+#  include <threads.h>
+
+# endif
+#endif
+
+/* Use the system's setlocale() function, not the gnulib override, here.  */
+#undef setlocale
+
+static const char *
+setlocale_null_androidfix (int category)
+{
+  const char *result = setlocale (category, NULL);
+
+#ifdef __ANDROID__
+  if (result == NULL)
+    switch (category)
+      {
+      case LC_CTYPE:
+      case LC_NUMERIC:
+      case LC_TIME:
+      case LC_COLLATE:
+      case LC_MONETARY:
+      case LC_MESSAGES:
+      case LC_ALL:
+      case LC_PAPER:
+      case LC_NAME:
+      case LC_ADDRESS:
+      case LC_TELEPHONE:
+      case LC_MEASUREMENT:
+        result = "C";
+        break;
+      default:
+        break;
+      }
+#endif
+
+  return result;
+}
+
+static int
+setlocale_null_unlocked (int category, char *buf, size_t bufsize)
+{
+#if defined _WIN32 && !defined __CYGWIN__ && defined _MSC_VER
+  /* On native Windows, nowadays, the setlocale() implementation is based
+     on _wsetlocale() and uses malloc() for the result.  We are better off
+     using _wsetlocale() directly.  */
+  const wchar_t *result = _wsetlocale (category, NULL);
+
+  if (result == NULL)
+    {
+      /* CATEGORY is invalid.  */
+      if (bufsize > 0)
+        /* Return an empty string in BUF.
+           This is a convenience for callers that don't want to write explicit
+           code for handling EINVAL.  */
+        buf[0] = '\0';
+      return EINVAL;
+    }
+  else
+    {
+      size_t length = wcslen (result);
+      if (length < bufsize)
+        {
+          size_t i;
+
+          /* Convert wchar_t[] -> char[], assuming plain ASCII.  */
+          for (i = 0; i <= length; i++)
+            buf[i] = result[i];
+
+          return 0;
+        }
+      else
+        {
+          if (bufsize > 0)
+            {
+              /* Return a truncated result in BUF.
+                 This is a convenience for callers that don't want to write
+                 explicit code for handling ERANGE.  */
+              size_t i;
+
+              /* Convert wchar_t[] -> char[], assuming plain ASCII.  */
+              for (i = 0; i < bufsize; i++)
+                buf[i] = result[i];
+              buf[bufsize - 1] = '\0';
+            }
+          return ERANGE;
+        }
+    }
+#else
+  const char *result = setlocale_null_androidfix (category);
+
+  if (result == NULL)
+    {
+      /* CATEGORY is invalid.  */
+      if (bufsize > 0)
+        /* Return an empty string in BUF.
+           This is a convenience for callers that don't want to write explicit
+           code for handling EINVAL.  */
+        buf[0] = '\0';
+      return EINVAL;
+    }
+  else
+    {
+      size_t length = strlen (result);
+      if (length < bufsize)
+        {
+          memcpy (buf, result, length + 1);
+          return 0;
+        }
+      else
+        {
+          if (bufsize > 0)
+            {
+              /* Return a truncated result in BUF.
+                 This is a convenience for callers that don't want to write
+                 explicit code for handling ERANGE.  */
+              memcpy (buf, result, bufsize - 1);
+              buf[bufsize - 1] = '\0';
+            }
+          return ERANGE;
+        }
+    }
+#endif
+}
+
+#if !(SETLOCALE_NULL_ALL_MTSAFE && SETLOCALE_NULL_ONE_MTSAFE) /* musl libc, macOS, FreeBSD, NetBSD, OpenBSD, AIX, Haiku, Cygwin */
+
+/* Use a lock, so that no two threads can invoke setlocale_null_unlocked
+   at the same time.  */
+
+/* Prohibit renaming this symbol.  */
+# undef gl_get_setlocale_null_lock
+
+# if defined _WIN32 && !defined __CYGWIN__
+
+extern __declspec(dllimport) CRITICAL_SECTION *gl_get_setlocale_null_lock (void);
+
+static int
+setlocale_null_with_lock (int category, char *buf, size_t bufsize)
+{
+  CRITICAL_SECTION *lock = gl_get_setlocale_null_lock ();
+  int ret;
+
+  EnterCriticalSection (lock);
+  ret = setlocale_null_unlocked (category, buf, bufsize);
+  LeaveCriticalSection (lock);
+
+  return ret;
+}
+
+# elif HAVE_PTHREAD_API /* musl libc, macOS, FreeBSD, NetBSD, OpenBSD, AIX, Haiku, Cygwin */
+
+extern
+#  if defined _WIN32 || defined __CYGWIN__
+  __declspec(dllimport)
+#  endif
+  pthread_mutex_t *gl_get_setlocale_null_lock (void);
+
+#  if HAVE_WEAK_SYMBOLS /* musl libc, FreeBSD, NetBSD, OpenBSD, Haiku */
+
+    /* Avoid the need to link with '-lpthread'.  */
+#   pragma weak pthread_mutex_lock
+#   pragma weak pthread_mutex_unlock
+
+    /* Determine whether libpthread is in use.  */
+#   pragma weak pthread_mutexattr_gettype
+    /* See the comments in lock.h.  */
+#   define pthread_in_use() \
+      (pthread_mutexattr_gettype != NULL || c11_threads_in_use ())
+
+#  else
+#   define pthread_in_use() 1
+#  endif
+
+static int
+setlocale_null_with_lock (int category, char *buf, size_t bufsize)
+{
+  if (pthread_in_use())
+    {
+      pthread_mutex_t *lock = gl_get_setlocale_null_lock ();
+      int ret;
+
+      if (pthread_mutex_lock (lock))
+        abort ();
+      ret = setlocale_null_unlocked (category, buf, bufsize);
+      if (pthread_mutex_unlock (lock))
+        abort ();
+
+      return ret;
+    }
+  else
+    return setlocale_null_unlocked (category, buf, bufsize);
+}
+
+# elif HAVE_THREADS_H
+
+extern mtx_t *gl_get_setlocale_null_lock (void);
+
+static int
+setlocale_null_with_lock (int category, char *buf, size_t bufsize)
+{
+  mtx_t *lock = gl_get_setlocale_null_lock ();
+  int ret;
+
+  if (mtx_lock (lock) != thrd_success)
+    abort ();
+  ret = setlocale_null_unlocked (category, buf, bufsize);
+  if (mtx_unlock (lock) != thrd_success)
+    abort ();
+
+  return ret;
+}
+
+# endif
+
+#endif
+
+int
+setlocale_null_r (int category, char *buf, size_t bufsize)
+{
+#if SETLOCALE_NULL_ALL_MTSAFE
+# if SETLOCALE_NULL_ONE_MTSAFE
+
+  return setlocale_null_unlocked (category, buf, bufsize);
+
+# else
+
+  if (category == LC_ALL)
+    return setlocale_null_unlocked (category, buf, bufsize);
+  else
+    return setlocale_null_with_lock (category, buf, bufsize);
+
+# endif
+#else
+# if SETLOCALE_NULL_ONE_MTSAFE
+
+  if (category == LC_ALL)
+    return setlocale_null_with_lock (category, buf, bufsize);
+  else
+    return setlocale_null_unlocked (category, buf, bufsize);
+
+# else
+
+  return setlocale_null_with_lock (category, buf, bufsize);
+
+# endif
+#endif
+}
+
+const char *
+setlocale_null (int category)
+{
+#if SETLOCALE_NULL_ALL_MTSAFE && SETLOCALE_NULL_ONE_MTSAFE
+  return setlocale_null_androidfix (category);
+#else
+
+  /* This call must be multithread-safe.  To achieve this without using
+     thread-local storage:
+       1. We use a specific static buffer for each possible CATEGORY
+          argument.  So that different threads can call setlocale_mtsafe
+          with different CATEGORY arguments, without interfering.
+       2. We use a simple strcpy or memcpy to fill this static buffer.
+          Filling it through, for example, strcpy + strcat would not be
+          guaranteed to leave the buffer's contents intact if another thread
+          is currently accessing it.  If necessary, the contents is first
+          assembled in a stack-allocated buffer.  */
+  if (category == LC_ALL)
+    {
+# if SETLOCALE_NULL_ALL_MTSAFE
+      return setlocale_null_androidfix (LC_ALL);
+# else
+      char buf[SETLOCALE_NULL_ALL_MAX];
+      static char resultbuf[SETLOCALE_NULL_ALL_MAX];
+
+      if (setlocale_null_r (LC_ALL, buf, sizeof (buf)))
+        return "C";
+      strcpy (resultbuf, buf);
+      return resultbuf;
+# endif
+    }
+  else
+    {
+# if SETLOCALE_NULL_ONE_MTSAFE
+      return setlocale_null_androidfix (category);
+# else
+      enum
+        {
+          LC_CTYPE_INDEX,
+          LC_NUMERIC_INDEX,
+          LC_TIME_INDEX,
+          LC_COLLATE_INDEX,
+          LC_MONETARY_INDEX,
+          LC_MESSAGES_INDEX,
+#  ifdef LC_PAPER
+          LC_PAPER_INDEX,
+#  endif
+#  ifdef LC_NAME
+          LC_NAME_INDEX,
+#  endif
+#  ifdef LC_ADDRESS
+          LC_ADDRESS_INDEX,
+#  endif
+#  ifdef LC_TELEPHONE
+          LC_TELEPHONE_INDEX,
+#  endif
+#  ifdef LC_MEASUREMENT
+          LC_MEASUREMENT_INDEX,
+#  endif
+#  ifdef LC_IDENTIFICATION
+          LC_IDENTIFICATION_INDEX,
+#  endif
+          LC_INDICES_COUNT
+        }
+        i;
+      char buf[SETLOCALE_NULL_MAX];
+      static char resultbuf[LC_INDICES_COUNT][SETLOCALE_NULL_MAX];
+      int err;
+
+      err = setlocale_null_r (category, buf, sizeof (buf));
+      if (err == EINVAL)
+        return NULL;
+      if (err)
+        return "C";
+
+      switch (category)
+        {
+        case LC_CTYPE:          i = LC_CTYPE_INDEX;          break;
+        case LC_NUMERIC:        i = LC_NUMERIC_INDEX;        break;
+        case LC_TIME:           i = LC_TIME_INDEX;           break;
+        case LC_COLLATE:        i = LC_COLLATE_INDEX;        break;
+        case LC_MONETARY:       i = LC_MONETARY_INDEX;       break;
+        case LC_MESSAGES:       i = LC_MESSAGES_INDEX;       break;
+#  ifdef LC_PAPER
+        case LC_PAPER:          i = LC_PAPER_INDEX;          break;
+#  endif
+#  ifdef LC_NAME
+        case LC_NAME:           i = LC_NAME_INDEX;           break;
+#  endif
+#  ifdef LC_ADDRESS
+        case LC_ADDRESS:        i = LC_ADDRESS_INDEX;        break;
+#  endif
+#  ifdef LC_TELEPHONE
+        case LC_TELEPHONE:      i = LC_TELEPHONE_INDEX;      break;
+#  endif
+#  ifdef LC_MEASUREMENT
+        case LC_MEASUREMENT:    i = LC_MEASUREMENT_INDEX;    break;
+#  endif
+#  ifdef LC_IDENTIFICATION
+        case LC_IDENTIFICATION: i = LC_IDENTIFICATION_INDEX; break;
+#  endif
+        default:
+          /* If you get here, a #ifdef LC_xxx is missing.  */
+          abort ();
+        }
+
+      strcpy (resultbuf[i], buf);
+      return resultbuf[i];
+# endif
+    }
+#endif
+}
diff --git a/src/grep/lib/setlocale_null.h b/src/grep/lib/setlocale_null.h
new file mode 100644
index 0000000..00c42e2
--- /dev/null
+++ b/src/grep/lib/setlocale_null.h
@@ -0,0 +1,82 @@
+/* Query the name of the current global locale.
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#ifndef _SETLOCALE_NULL_H
+#define _SETLOCALE_NULL_H
+
+#include <stddef.h>
+
+#include "arg-nonnull.h"
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Recommended size of a buffer for a locale name for a single category.
+   On glibc systems, you can have locale names that are relative file names;
+   assume a maximum length 256.
+   In native Windows, in 2018 the longest locale name was of length 58
+   ("FYRO Macedonian_Former Yugoslav Republic of Macedonia.1251").  */
+#define SETLOCALE_NULL_MAX (256+1)
+
+/* Recommended size of a buffer for a locale name with all categories.
+   On glibc systems, you can have locale names that are relative file names;
+   assume maximum length 256 for each.  There are 12 categories; so, the
+   maximum total length is 148+12*256.
+   In native Windows, there are 5 categories, and the maximum total length is
+   55+5*58.  */
+#define SETLOCALE_NULL_ALL_MAX (148+12*256+1)
+
+/* setlocale_null_r (CATEGORY, BUF, BUFSIZE) is like setlocale (CATEGORY, NULL),
+   except that
+     - it is guaranteed to be multithread-safe,
+     - it returns the resulting locale category name or locale name in the
+       user-supplied buffer BUF, which must be BUFSIZE bytes long.
+   The recommended minimum buffer size is
+     - SETLOCALE_NULL_MAX for CATEGORY != LC_ALL, and
+     - SETLOCALE_NULL_ALL_MAX for CATEGORY == LC_ALL.
+   The return value is an error code: 0 if the call is successful, EINVAL if
+   CATEGORY is invalid, or ERANGE if BUFSIZE is smaller than the length needed
+   size (including the trailing NUL byte).  In the latter case, a truncated
+   result is returned in BUF, but still NUL-terminated if BUFSIZE > 0.
+   For this call to be multithread-safe, *all* calls to
+   setlocale (CATEGORY, NULL) in all other threads must have been converted
+   to use setlocale_null_r or setlocale_null as well, and the other threads
+   must not make other setlocale invocations (since changing the global locale
+   has side effects on all threads).  */
+extern int setlocale_null_r (int category, char *buf, size_t bufsize)
+  _GL_ARG_NONNULL ((2));
+
+/* setlocale_null (CATEGORY) is like setlocale (CATEGORY, NULL), except that
+   it is guaranteed to be multithread-safe.
+   The return value is NULL if CATEGORY is invalid.
+   For this call to be multithread-safe, *all* calls to
+   setlocale (CATEGORY, NULL) in all other threads must have been converted
+   to use setlocale_null_r or setlocale_null as well, and the other threads
+   must not make other setlocale invocations (since changing the global locale
+   has side effects on all threads).  */
+extern const char *setlocale_null (int category);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SETLOCALE_NULL_H */
diff --git a/src/grep/lib/signal.in.h b/src/grep/lib/signal.in.h
new file mode 100644
index 0000000..275da8c
--- /dev/null
+++ b/src/grep/lib/signal.in.h
@@ -0,0 +1,487 @@
+/* A GNU-like <signal.h>.
+
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if defined __need_sig_atomic_t || defined __need_sigset_t || defined _GL_ALREADY_INCLUDING_SIGNAL_H || (defined _SIGNAL_H && !defined __SIZEOF_PTHREAD_MUTEX_T)
+/* Special invocation convention:
+   - Inside glibc header files.
+   - On glibc systems we have a sequence of nested includes
+     <signal.h> -> <ucontext.h> -> <signal.h>.
+     In this situation, the functions are not yet declared, therefore we cannot
+     provide the C++ aliases.
+   - On glibc systems with GCC 4.3 we have a sequence of nested includes
+     <csignal> -> </usr/include/signal.h> -> <sys/ucontext.h> -> <signal.h>.
+     In this situation, some of the functions are not yet declared, therefore
+     we cannot provide the C++ aliases.  */
+
+# @INCLUDE_NEXT@ @NEXT_SIGNAL_H@
+
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_SIGNAL_H
+
+#define _GL_ALREADY_INCLUDING_SIGNAL_H
+
+/* Define pid_t, uid_t.
+   Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>.
+   On Solaris 10, <signal.h> includes <sys/types.h>, which eventually includes
+   us; so include <sys/types.h> now, before the second inclusion guard.  */
+#include <sys/types.h>
+
+/* The include_next requires a split double-inclusion guard.  */
+#@INCLUDE_NEXT@ @NEXT_SIGNAL_H@
+
+#undef _GL_ALREADY_INCLUDING_SIGNAL_H
+
+#ifndef _@GUARD_PREFIX@_SIGNAL_H
+#define _@GUARD_PREFIX@_SIGNAL_H
+
+/* Mac OS X 10.3, FreeBSD 6.4, OpenBSD 3.8, OSF/1 4.0, Solaris 2.6, Android,
+   OS/2 kLIBC declare pthread_sigmask in <pthread.h>, not in <signal.h>.
+   But avoid namespace pollution on glibc systems.*/
+#if (@GNULIB_PTHREAD_SIGMASK@ || defined GNULIB_POSIXCHECK) \
+    && ((defined __APPLE__ && defined __MACH__) \
+        || defined __FreeBSD__ || defined __OpenBSD__ || defined __osf__ \
+        || defined __sun || defined __ANDROID__ || defined __KLIBC__) \
+    && ! defined __GLIBC__
+# include <pthread.h>
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+/* On AIX, sig_atomic_t already includes volatile.  C99 requires that
+   'volatile sig_atomic_t' ignore the extra modifier, but C89 did not.
+   Hence, redefine this to a non-volatile type as needed.  */
+#if ! @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
+# if !GNULIB_defined_sig_atomic_t
+typedef int rpl_sig_atomic_t;
+#  undef sig_atomic_t
+#  define sig_atomic_t rpl_sig_atomic_t
+#  define GNULIB_defined_sig_atomic_t 1
+# endif
+#endif
+
+/* A set or mask of signals.  */
+#if !@HAVE_SIGSET_T@
+# if !GNULIB_defined_sigset_t
+typedef unsigned int sigset_t;
+#  define GNULIB_defined_sigset_t 1
+# endif
+#endif
+
+/* Define sighandler_t, the type of signal handlers.  A GNU extension.  */
+#if !@HAVE_SIGHANDLER_T@
+# ifdef __cplusplus
+extern "C" {
+# endif
+# if !GNULIB_defined_sighandler_t
+typedef void (*sighandler_t) (int);
+#  define GNULIB_defined_sighandler_t 1
+# endif
+# ifdef __cplusplus
+}
+# endif
+#endif
+
+
+#if @GNULIB_SIGNAL_H_SIGPIPE@
+# ifndef SIGPIPE
+/* Define SIGPIPE to a value that does not overlap with other signals.  */
+#  define SIGPIPE 13
+#  define GNULIB_defined_SIGPIPE 1
+/* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask',
+   'write', 'stdio'.  */
+# endif
+#endif
+
+
+/* Maximum signal number + 1.  */
+#ifndef NSIG
+# if defined __TANDEM
+#  define NSIG 32
+# endif
+#endif
+
+
+#if @GNULIB_PTHREAD_SIGMASK@
+# if @REPLACE_PTHREAD_SIGMASK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_sigmask
+#   define pthread_sigmask rpl_pthread_sigmask
+#  endif
+_GL_FUNCDECL_RPL (pthread_sigmask, int,
+                  (int how,
+                   const sigset_t *restrict new_mask,
+                   sigset_t *restrict old_mask));
+_GL_CXXALIAS_RPL (pthread_sigmask, int,
+                  (int how,
+                   const sigset_t *restrict new_mask,
+                   sigset_t *restrict old_mask));
+# else
+#  if !(@HAVE_PTHREAD_SIGMASK@ || defined pthread_sigmask)
+_GL_FUNCDECL_SYS (pthread_sigmask, int,
+                  (int how,
+                   const sigset_t *restrict new_mask,
+                   sigset_t *restrict old_mask));
+#  endif
+_GL_CXXALIAS_SYS (pthread_sigmask, int,
+                  (int how,
+                   const sigset_t *restrict new_mask,
+                   sigset_t *restrict old_mask));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_sigmask);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_sigmask
+# if HAVE_RAW_DECL_PTHREAD_SIGMASK
+_GL_WARN_ON_USE (pthread_sigmask, "pthread_sigmask is not portable - "
+                 "use gnulib module pthread_sigmask for portability");
+# endif
+#endif
+
+
+#if @GNULIB_RAISE@
+# if @REPLACE_RAISE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef raise
+#   define raise rpl_raise
+#  endif
+_GL_FUNCDECL_RPL (raise, int, (int sig));
+_GL_CXXALIAS_RPL (raise, int, (int sig));
+# else
+#  if !@HAVE_RAISE@
+_GL_FUNCDECL_SYS (raise, int, (int sig));
+#  endif
+_GL_CXXALIAS_SYS (raise, int, (int sig));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (raise);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef raise
+/* Assume raise is always declared.  */
+_GL_WARN_ON_USE (raise, "raise can crash on native Windows - "
+                 "use gnulib module raise for portability");
+#endif
+
+
+#if @GNULIB_SIGPROCMASK@
+# if !@HAVE_POSIX_SIGNALBLOCKING@
+
+#  ifndef GNULIB_defined_signal_blocking
+#   define GNULIB_defined_signal_blocking 1
+#  endif
+
+/* Maximum signal number + 1.  */
+#  ifndef NSIG
+#   define NSIG 32
+#  endif
+
+/* This code supports only 32 signals.  */
+#  if !GNULIB_defined_verify_NSIG_constraint
+typedef int verify_NSIG_constraint[NSIG <= 32 ? 1 : -1];
+#   define GNULIB_defined_verify_NSIG_constraint 1
+#  endif
+
+# endif
+
+/* When also using extern inline, suppress the use of static inline in
+   standard headers of problematic Apple configurations, as Libc at
+   least through Libc-825.26 (2013-04-09) mishandles it; see, e.g.,
+   <https://lists.gnu.org/r/bug-gnulib/2012-12/msg00023.html>.
+   Perhaps Apple will fix this some day.  */
+#if (defined _GL_EXTERN_INLINE_IN_USE && defined __APPLE__ \
+     && (defined __i386__ || defined __x86_64__))
+# undef sigaddset
+# undef sigdelset
+# undef sigemptyset
+# undef sigfillset
+# undef sigismember
+#endif
+
+/* Test whether a given signal is contained in a signal set.  */
+# if @HAVE_POSIX_SIGNALBLOCKING@
+/* This function is defined as a macro on Mac OS X.  */
+#  if defined __cplusplus && defined GNULIB_NAMESPACE
+#   undef sigismember
+#  endif
+# else
+_GL_FUNCDECL_SYS (sigismember, int, (const sigset_t *set, int sig)
+                                    _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigismember, int, (const sigset_t *set, int sig));
+_GL_CXXALIASWARN (sigismember);
+
+/* Initialize a signal set to the empty set.  */
+# if @HAVE_POSIX_SIGNALBLOCKING@
+/* This function is defined as a macro on Mac OS X.  */
+#  if defined __cplusplus && defined GNULIB_NAMESPACE
+#   undef sigemptyset
+#  endif
+# else
+_GL_FUNCDECL_SYS (sigemptyset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigemptyset, int, (sigset_t *set));
+_GL_CXXALIASWARN (sigemptyset);
+
+/* Add a signal to a signal set.  */
+# if @HAVE_POSIX_SIGNALBLOCKING@
+/* This function is defined as a macro on Mac OS X.  */
+#  if defined __cplusplus && defined GNULIB_NAMESPACE
+#   undef sigaddset
+#  endif
+# else
+_GL_FUNCDECL_SYS (sigaddset, int, (sigset_t *set, int sig)
+                                  _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigaddset, int, (sigset_t *set, int sig));
+_GL_CXXALIASWARN (sigaddset);
+
+/* Remove a signal from a signal set.  */
+# if @HAVE_POSIX_SIGNALBLOCKING@
+/* This function is defined as a macro on Mac OS X.  */
+#  if defined __cplusplus && defined GNULIB_NAMESPACE
+#   undef sigdelset
+#  endif
+# else
+_GL_FUNCDECL_SYS (sigdelset, int, (sigset_t *set, int sig)
+                                  _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigdelset, int, (sigset_t *set, int sig));
+_GL_CXXALIASWARN (sigdelset);
+
+/* Fill a signal set with all possible signals.  */
+# if @HAVE_POSIX_SIGNALBLOCKING@
+/* This function is defined as a macro on Mac OS X.  */
+#  if defined __cplusplus && defined GNULIB_NAMESPACE
+#   undef sigfillset
+#  endif
+# else
+_GL_FUNCDECL_SYS (sigfillset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigfillset, int, (sigset_t *set));
+_GL_CXXALIASWARN (sigfillset);
+
+/* Return the set of those blocked signals that are pending.  */
+# if !@HAVE_POSIX_SIGNALBLOCKING@
+_GL_FUNCDECL_SYS (sigpending, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigpending, int, (sigset_t *set));
+_GL_CXXALIASWARN (sigpending);
+
+/* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
+   Then, if SET is not NULL, affect the current set of blocked signals by
+   combining it with *SET as indicated in OPERATION.
+   In this implementation, you are not allowed to change a signal handler
+   while the signal is blocked.  */
+# if !@HAVE_POSIX_SIGNALBLOCKING@
+#  define SIG_BLOCK   0  /* blocked_set = blocked_set | *set; */
+#  define SIG_SETMASK 1  /* blocked_set = *set; */
+#  define SIG_UNBLOCK 2  /* blocked_set = blocked_set & ~*set; */
+_GL_FUNCDECL_SYS (sigprocmask, int,
+                  (int operation,
+                   const sigset_t *restrict set,
+                   sigset_t *restrict old_set));
+# endif
+_GL_CXXALIAS_SYS (sigprocmask, int,
+                  (int operation,
+                   const sigset_t *restrict set,
+                   sigset_t *restrict old_set));
+_GL_CXXALIASWARN (sigprocmask);
+
+/* Install the handler FUNC for signal SIG, and return the previous
+   handler.  */
+# ifdef __cplusplus
+extern "C" {
+# endif
+# if !GNULIB_defined_function_taking_int_returning_void_t
+typedef void (*_gl_function_taking_int_returning_void_t) (int);
+#  define GNULIB_defined_function_taking_int_returning_void_t 1
+# endif
+# ifdef __cplusplus
+}
+# endif
+# if !@HAVE_POSIX_SIGNALBLOCKING@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define signal rpl_signal
+#  endif
+_GL_FUNCDECL_RPL (signal, _gl_function_taking_int_returning_void_t,
+                  (int sig, _gl_function_taking_int_returning_void_t func));
+_GL_CXXALIAS_RPL (signal, _gl_function_taking_int_returning_void_t,
+                  (int sig, _gl_function_taking_int_returning_void_t func));
+# else
+/* On OpenBSD, the declaration of 'signal' may not be present at this point,
+   because it occurs in <sys/signal.h>, not <signal.h> directly.  */
+#  if defined __OpenBSD__
+_GL_FUNCDECL_SYS (signal, _gl_function_taking_int_returning_void_t,
+                  (int sig, _gl_function_taking_int_returning_void_t func));
+#  endif
+_GL_CXXALIAS_SYS (signal, _gl_function_taking_int_returning_void_t,
+                  (int sig, _gl_function_taking_int_returning_void_t func));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (signal);
+# endif
+
+# if !@HAVE_POSIX_SIGNALBLOCKING@ && GNULIB_defined_SIGPIPE
+/* Raise signal SIGPIPE.  */
+_GL_EXTERN_C int _gl_raise_SIGPIPE (void);
+# endif
+
+#elif defined GNULIB_POSIXCHECK
+# undef sigaddset
+# if HAVE_RAW_DECL_SIGADDSET
+_GL_WARN_ON_USE (sigaddset, "sigaddset is unportable - "
+                 "use the gnulib module sigprocmask for portability");
+# endif
+# undef sigdelset
+# if HAVE_RAW_DECL_SIGDELSET
+_GL_WARN_ON_USE (sigdelset, "sigdelset is unportable - "
+                 "use the gnulib module sigprocmask for portability");
+# endif
+# undef sigemptyset
+# if HAVE_RAW_DECL_SIGEMPTYSET
+_GL_WARN_ON_USE (sigemptyset, "sigemptyset is unportable - "
+                 "use the gnulib module sigprocmask for portability");
+# endif
+# undef sigfillset
+# if HAVE_RAW_DECL_SIGFILLSET
+_GL_WARN_ON_USE (sigfillset, "sigfillset is unportable - "
+                 "use the gnulib module sigprocmask for portability");
+# endif
+# undef sigismember
+# if HAVE_RAW_DECL_SIGISMEMBER
+_GL_WARN_ON_USE (sigismember, "sigismember is unportable - "
+                 "use the gnulib module sigprocmask for portability");
+# endif
+# undef sigpending
+# if HAVE_RAW_DECL_SIGPENDING
+_GL_WARN_ON_USE (sigpending, "sigpending is unportable - "
+                 "use the gnulib module sigprocmask for portability");
+# endif
+# undef sigprocmask
+# if HAVE_RAW_DECL_SIGPROCMASK
+_GL_WARN_ON_USE (sigprocmask, "sigprocmask is unportable - "
+                 "use the gnulib module sigprocmask for portability");
+# endif
+#endif /* @GNULIB_SIGPROCMASK@ */
+
+
+#if @GNULIB_SIGACTION@
+# if !@HAVE_SIGACTION@
+
+#  if !@HAVE_SIGINFO_T@
+
+#   if !GNULIB_defined_siginfo_types
+
+/* Present to allow compilation, but unsupported by gnulib.  */
+union sigval
+{
+  int sival_int;
+  void *sival_ptr;
+};
+
+/* Present to allow compilation, but unsupported by gnulib.  */
+struct siginfo_t
+{
+  int si_signo;
+  int si_code;
+  int si_errno;
+  pid_t si_pid;
+  uid_t si_uid;
+  void *si_addr;
+  int si_status;
+  long si_band;
+  union sigval si_value;
+};
+typedef struct siginfo_t siginfo_t;
+
+#    define GNULIB_defined_siginfo_types 1
+#   endif
+
+#  endif /* !@HAVE_SIGINFO_T@ */
+
+/* We assume that platforms which lack the sigaction() function also lack
+   the 'struct sigaction' type, and vice versa.  */
+
+#  if !GNULIB_defined_struct_sigaction
+
+struct sigaction
+{
+  union
+  {
+    void (*_sa_handler) (int);
+    /* Present to allow compilation, but unsupported by gnulib.  POSIX
+       says that implementations may, but not must, make sa_sigaction
+       overlap with sa_handler, but we know of no implementation where
+       they do not overlap.  */
+    void (*_sa_sigaction) (int, siginfo_t *, void *);
+  } _sa_func;
+  sigset_t sa_mask;
+  /* Not all POSIX flags are supported.  */
+  int sa_flags;
+};
+#   define sa_handler _sa_func._sa_handler
+#   define sa_sigaction _sa_func._sa_sigaction
+/* Unsupported flags are not present.  */
+#   define SA_RESETHAND 1
+#   define SA_NODEFER 2
+#   define SA_RESTART 4
+
+#   define GNULIB_defined_struct_sigaction 1
+#  endif
+
+_GL_FUNCDECL_SYS (sigaction, int, (int, const struct sigaction *restrict,
+                                   struct sigaction *restrict));
+
+# elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@
+
+#  define sa_sigaction sa_handler
+
+# endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */
+
+_GL_CXXALIAS_SYS (sigaction, int, (int, const struct sigaction *restrict,
+                                   struct sigaction *restrict));
+_GL_CXXALIASWARN (sigaction);
+
+#elif defined GNULIB_POSIXCHECK
+# undef sigaction
+# if HAVE_RAW_DECL_SIGACTION
+_GL_WARN_ON_USE (sigaction, "sigaction is unportable - "
+                 "use the gnulib module sigaction for portability");
+# endif
+#endif
+
+/* Some systems don't have SA_NODEFER.  */
+#ifndef SA_NODEFER
+# define SA_NODEFER 0
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_SIGNAL_H */
+#endif /* _@GUARD_PREFIX@_SIGNAL_H */
+#endif
diff --git a/src/grep/lib/sigsegv.c b/src/grep/lib/sigsegv.c
new file mode 100644
index 0000000..998c827
--- /dev/null
+++ b/src/grep/lib/sigsegv.c
@@ -0,0 +1,1374 @@
+/* Page fault handling library.
+   Copyright (C) 1993-2021 Free Software Foundation, Inc.
+   Copyright (C) 2018  Nylon Chen <nylon7@andestech.com>
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible and Nylon Chen.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "sigsegv.h"
+
+#include <errno.h>
+#include <stdio.h> /* declares perror */
+#include <stdint.h> /* defines uintptr_t */
+#include <stdlib.h>
+#include <signal.h>
+#if HAVE_GETRLIMIT
+# include <sys/resource.h> /* declares struct rlimit */
+#endif
+
+#ifdef __OpenBSD__
+# include <sys/param.h> /* defines macro OpenBSD */
+#endif
+
+
+/* Version number.  */
+int libsigsegv_version = LIBSIGSEGV_VERSION;
+
+
+/* ======================= Fault handler information ======================= */
+
+/* Define:
+
+     SIGSEGV_FAULT_HANDLER_ARGLIST
+          is the argument list for the actual fault handler.
+
+   and if available (optional):
+
+     SIGSEGV_FAULT_ADDRESS
+          is a macro for fetching the fault address.
+
+     SIGSEGV_FAULT_CONTEXT
+          is a macro giving a pointer to the entire fault context (i.e.
+          the register set etc.).
+
+     SIGSEGV_FAULT_STACKPOINTER
+          is a macro for fetching the stackpointer at the moment the fault
+          occurred.
+ */
+
+#if defined __linux__ || defined __ANDROID__ /* Linux */
+
+# define SIGSEGV_FAULT_HANDLER_ARGLIST  int sig, siginfo_t *sip, void *ucp
+# define SIGSEGV_FAULT_ADDRESS  sip->si_addr
+# define SIGSEGV_FAULT_CONTEXT  ((ucontext_t *) ucp)
+# define SIGSEGV_FAULT_ADDRESS_FROM_SIGINFO
+
+# if defined __alpha__
+
+/* See glibc/sysdeps/unix/sysv/linux/alpha/sys/ucontext.h
+   and the definition of GET_STACK in
+   glibc/sysdeps/unix/sysv/linux/alpha/sigcontextinfo.h.
+   Note that the 'mcontext_t' defined in
+   glibc/sysdeps/unix/sysv/linux/alpha/sys/ucontext.h
+   and the 'struct sigcontext' defined in <asm/sigcontext.h>
+   are actually the same.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.sc_regs[30]
+
+# elif defined __arm64__ /* 64-bit */
+
+/* See glibc/sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h.
+   Note that the 'mcontext_t' defined in
+   glibc/sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h
+   and the 'struct sigcontext' defined in <asm/sigcontext.h>
+   are actually the same.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.sp
+
+# elif defined __arm__ || defined __armhf__ /* 32-bit */
+
+/* See glibc/sysdeps/unix/sysv/linux/arm/sys/ucontext.h
+   and the definition of GET_STACK in
+   glibc/sysdeps/unix/sysv/linux/arm/sigcontextinfo.h.
+   Note that the 'mcontext_t' defined in
+   glibc/sysdeps/unix/sysv/linux/arm/sys/ucontext.h
+   and the 'struct sigcontext' defined in <asm/sigcontext.h>
+   are actually the same.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.arm_sp
+
+# elif defined __cris__
+
+/* See glibc-ports/sysdeps/unix/sysv/linux/cris/sys/ucontext.h.
+   Note that the 'mcontext_t' defined in
+   glibc-ports/sysdeps/unix/sysv/linux/cris/sys/ucontext.h
+   and the 'struct sigcontext' defined in <asm/sigcontext.h>
+   are actually the same.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.usp
+
+# elif defined __hppa__
+
+/* See glibc/sysdeps/unix/sysv/linux/hppa/sys/ucontext.h.
+   Note that the 'mcontext_t' defined in
+   glibc/sysdeps/unix/sysv/linux/hppa/sys/ucontext.h
+   and the 'struct sigcontext' defined in <asm/sigcontext.h>
+   are actually the same.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.sc_gr[30]
+
+# elif defined __x86_64__ /* 64 bit registers */
+
+/* See glibc/sysdeps/unix/sysv/linux/x86/sys/ucontext.h
+   and the definition of GET_STACK in
+   glibc/sysdeps/unix/sysv/linux/x86_64/sigcontextinfo.h.
+   Note that the 'mcontext_t' defined in
+   glibc/sysdeps/unix/sysv/linux/x86/sys/ucontext.h
+   and the 'struct sigcontext' defined in
+   glibc/sysdeps/unix/sysv/linux/x86/bits/sigcontext.h
+   (see also <asm/sigcontext.h>)
+   are effectively the same.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.gregs[REG_RSP]
+
+# elif defined __i386__ /* 32 bit registers */
+
+/* See glibc/sysdeps/unix/sysv/linux/x86/sys/ucontext.h
+   and the definition of GET_STACK in
+   glibc/sysdeps/unix/sysv/linux/i386/sigcontextinfo.h.
+   Note that the 'mcontext_t' defined in
+   glibc/sysdeps/unix/sysv/linux/x86/sys/ucontext.h
+   and the 'struct sigcontext_ia32' defined in <asm/sigcontext32.h>
+   are effectively the same.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.gregs[REG_ESP]
+                     /* same value as ((ucontext_t *) ucp)->uc_mcontext.gregs[REG_UESP] */
+
+# elif defined __ia64__
+
+/* See glibc/sysdeps/unix/sysv/linux/ia64/sys/ucontext.h.
+   Note that the 'mcontext_t' defined in
+   glibc/sysdeps/unix/sysv/linux/ia64/sys/ucontext.h
+   and the 'struct sigcontext' defined in
+   glibc/sysdeps/unix/sysv/linux/ia64/bits/sigcontext.h
+   (see also <asm/sigcontext.h>)
+   are actually the same.  */
+
+/* IA-64 has two stack pointers, one that grows down, called $r12, and one
+   that grows up, called $bsp/$bspstore.  */
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.sc_gr[12]
+
+/* It would be better to access $bspstore instead of $bsp but I don't know
+   where to find it in 'struct sigcontext'.  Anyway, it doesn't matter
+   because $bsp and $bspstore never differ by more than ca. 1 KB.  */
+#  define SIGSEGV_FAULT_BSP_POINTER  ((ucontext_t *) ucp)->uc_mcontext.sc_ar_bsp
+
+# elif defined __m68k__
+
+/* See glibc/sysdeps/unix/sysv/linux/m68k/sys/ucontext.h
+   and the definition of GET_STACK in
+   glibc/sysdeps/unix/sysv/linux/m68k/sigcontextinfo.h.
+   Note that the 'mcontext_t' defined in
+   glibc/sysdeps/unix/sysv/linux/m68k/sys/ucontext.h
+   and the 'struct sigcontext' defined in <asm/sigcontext.h>
+   are quite different types.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.gregs[R_SP]
+
+# elif defined __mips__ || defined __mipsn32__ || defined __mips64__
+
+/* See glibc/sysdeps/unix/sysv/linux/mips/sys/ucontext.h
+   and the definition of GET_STACK in
+   glibc/sysdeps/unix/sysv/linux/mips/sigcontextinfo.h.
+   Note that the 'mcontext_t' defined in
+   glibc/sysdeps/unix/sysv/linux/mips/sys/ucontext.h
+   and the 'struct sigcontext' defined in
+   glibc/sysdeps/unix/sysv/linux/mips/bits/sigcontext.h
+   (see also <asm/sigcontext.h>)
+   are effectively the same.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.gregs[29]
+
+# elif defined __nds32__
+
+/* See glibc/sysdeps/unix/sysv/linux/nds32/sys/ucontext.h
+   and the definition of GET_STACK in
+   glibc/sysdeps/unix/sysv/linux/nds32/sigcontextinfo.h.
+   Both are found in <https://patches-gcc.linaro.org/cover/4409/> part 08/11
+   <https://sourceware.org/ml/libc-alpha/2018-05/msg00125.html>.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.nds32_sp
+
+# elif defined __powerpc__ || defined __powerpc64__ || defined __powerpc64_elfv2__
+
+/* See glibc/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h
+   and the definition of GET_STACK in
+   glibc/sysdeps/unix/sysv/linux/powerpc/sigcontextinfo.h.
+   Note that the 'mcontext_t' defined in
+   glibc/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h,
+   the 'struct sigcontext' defined in <asm/sigcontext.h>,
+   and the 'struct pt_regs' defined in <asm/ptrace.h>
+   are quite different types.  */
+
+#  if defined __powerpc64__ || defined __powerpc64_elfv2__ /* 64-bit */
+#   define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.gp_regs[1]
+#  else /* 32-bit */
+/* both should be equivalent */
+#   if 0
+#    define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.regs->gpr[1]
+#   else
+#    define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.uc_regs->gregs[1]
+#   endif
+#  endif
+
+# elif defined __riscv32__ || __riscv64__
+
+/* See glibc/sysdeps/unix/sysv/linux/riscv/sys/ucontext.h
+   and the definition of GET_STACK in
+   glibc/sysdeps/unix/sysv/linux/riscv/sigcontextinfo.h.
+   Note that the 'mcontext_t' defined in
+   glibc/sysdeps/unix/sysv/linux/riscv/sys/ucontext.h
+   and the 'struct sigcontext' defined in
+   glibc/sysdeps/unix/sysv/linux/riscv/bits/sigcontext.h
+   start with the same block of 32 general-purpose registers.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.__gregs[REG_SP]
+
+# elif defined __s390__ || defined __s390x__
+
+/* See glibc/sysdeps/unix/sysv/linux/s390/sys/ucontext.h
+   and the definition of GET_STACK in
+   glibc/sysdeps/unix/sysv/linux/s390/sigcontextinfo.h.
+   Note that the 'mcontext_t' defined in
+   glibc/sysdeps/unix/sysv/linux/s390/sys/ucontext.h
+   and the '_sigregs' type, indirect part of 'struct sigcontext', defined
+   in <asm/sigcontext.h>, are effectively the same.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.gregs[15]
+
+# elif defined __sh__
+
+/* See glibc/sysdeps/unix/sysv/linux/sh/sys/ucontext.h
+   and the definition of GET_STACK in
+   glibc/sysdeps/unix/sysv/linux/sh/sigcontextinfo.h.
+   Note that the 'mcontext_t' defined in
+   glibc/sysdeps/unix/sysv/linux/sh/sys/ucontext.h
+   and the 'struct sigcontext' defined in <asm/sigcontext.h>
+   are effectively the same.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.gregs[15]
+
+# elif defined __sparc__ || defined __sparc64__
+
+/* See glibc/sysdeps/unix/sysv/linux/sparc/sys/ucontext.h
+   and the definition of GET_STACK in
+   glibc/sysdeps/unix/sysv/linux/sparc/{sparc32,sparc64}/sigcontextinfo.h.
+   Note that the 'mcontext_t' defined in
+   glibc/sysdeps/unix/sysv/linux/sparc/sys/ucontext.h
+   and the 'struct sigcontext' defined in
+   glibc/sysdeps/unix/sysv/linux/sparc/bits/sigcontext.h
+   (see also <asm/sigcontext.h>)
+   are quite different types.  */
+
+#  if defined __sparc64__/* 64-bit */
+/* From linux-4.8.1/arch/sparc/kernel/signal_64.c, function setup_rt_frame, we
+   see that ucp is not an 'ucontext_t *' but rather a 'struct sigcontext *'
+   that happens to have the same value as sip (which is possible because a
+   'struct sigcontext' starts with 128 bytes room for the siginfo_t).  */
+#   define SIGSEGV_FAULT_STACKPOINTER  (((struct sigcontext *) ucp)->sigc_regs.u_regs[14] + 2047)
+#  else /* 32-bit */
+/* From linux-4.8.1/arch/sparc/kernel/signal_32.c, function setup_rt_frame,
+   and linux-4.8.1/arch/sparc/kernel/signal32.c, function setup_rt_frame32, we
+   see that ucp is a 'struct pt_regs *' or 'struct pt_regs32 *', respectively.
+   In userland, this is a 'struct sigcontext *'.  */
+#   define SIGSEGV_FAULT_STACKPOINTER  ((struct sigcontext *) ucp)->si_regs.u_regs[14]
+#  endif
+
+/* The sip->si_addr field is correct for a normal fault, but unusable in case
+   of a stack overflow. What I observe (when running
+   tests/test-sigsegv-catch-stackoverflow1, with a printf right at the beginning
+   of sigsegv_handler) is that sip->si_addr is near 0:
+     - in 64-bit mode: sip->si_addr = 0x000000000000030F, and gdb shows me that
+       the fault occurs in an instruction 'stx %o3,[%fp+0x30f]' and %fp is 0.
+       In fact, all registers %l0..%l7 and %i0..%i7 are 0.
+     - in 32-bit mode: sip->si_addr = 0xFFFFFA64, and gdb shows me that
+       the fault occurs in an instruction 'st %g2,[%fp-1436]' and %fp is 0.
+       In fact, all registers %l0..%l7 and %i0..%i7 are 0.
+   Apparently when the stack overflow occurred, some trap has tried to move the
+   contents of the registers %l0..%l7 and %i0..%i7 (a "window" in SPARC
+   terminology) to the stack, did not succeed in doing this, replaced all these
+   register values with 0, and resumed execution at the fault location. This
+   time, due to %fp = 0, a different fault was triggered. Now it is impossible
+   to determine the real (previous) fault address because, even if know the
+   faulting instruction, the previous register values have been lost.  */
+#  define BOGUS_FAULT_ADDRESS_UPON_STACK_OVERFLOW
+
+# else
+
+/* When adding support for other CPUs here:  */
+
+/* For SIGSEGV_FAULT_HANDLER_ARGLIST, see the definition of SIGCONTEXT in
+   glibc/sysdeps/unix/sysv/linux/<cpu>/sigcontextinfo.h.  */
+
+/* For SIGSEGV_FAULT_STACKPOINTER, see the definition of GET_STACK in
+   glibc/sysdeps/unix/sysv/linux/<cpu>/sigcontextinfo.h.  */
+
+# endif
+
+#endif
+
+#if defined __GNU__ /* Hurd */
+
+# define SIGSEGV_FAULT_HANDLER_ARGLIST  int sig, int code, struct sigcontext *scp
+# define SIGSEGV_FAULT_ADDRESS  (unsigned long) code
+# define SIGSEGV_FAULT_CONTEXT  scp
+
+# if defined __i386__
+
+/* scp points to a 'struct sigcontext' (defined in
+   glibc/sysdeps/mach/hurd/i386/bits/sigcontext.h).
+   The registers of this struct get pushed on the stack through
+   gnumach/i386/i386/locore.S:trapall.  */
+/* Both sc_esp and sc_uesp appear to have the same value.
+   It appears more reliable to use sc_uesp because it is labelled as
+   "old esp, if trapped from user".  */
+#  define SIGSEGV_FAULT_STACKPOINTER  scp->sc_uesp
+
+# endif
+
+#endif
+
+#if defined __FreeBSD_kernel__ || defined __FreeBSD__ || defined __DragonFly__ /* GNU/kFreeBSD, FreeBSD */
+
+# if defined __arm__ || defined __armhf__ || defined __arm64__
+
+#  define SIGSEGV_FAULT_HANDLER_ARGLIST  int sig, siginfo_t *sip, void *ucp
+#  define SIGSEGV_FAULT_ADDRESS  sip->si_addr
+#  define SIGSEGV_FAULT_CONTEXT  ((ucontext_t *) ucp)
+
+#  if defined __arm64__ /* 64-bit */
+
+/* See sys/arm64/include/ucontext.h.  */
+
+#   define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.mc_gpregs.gp_sp
+
+#  elif defined __arm__ || defined __armhf__ /* 32-bit */
+
+/* See sys/arm/include/ucontext.h.  */
+
+#   define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.__gregs[_REG_SP]
+
+#  endif
+
+# else
+
+/* On FreeBSD 12, both of these approaches work.  On FreeBSD derivatives, the
+   first one has more chances to work.  */
+#  if 1
+/* Use signal handlers without SA_SIGINFO.  */
+
+#   define SIGSEGV_FAULT_HANDLER_ARGLIST  int sig, int code, struct sigcontext *scp, void *addr
+#   define SIGSEGV_FAULT_ADDRESS  addr
+#   define SIGSEGV_FAULT_CONTEXT  scp
+
+/* See sys/x86/include/signal.h.  */
+
+#   if defined __x86_64__
+/* 64 bit registers */
+
+#    define SIGSEGV_FAULT_STACKPOINTER  scp->sc_rsp
+
+#   elif defined __i386__
+/* 32 bit registers */
+
+#    define SIGSEGV_FAULT_STACKPOINTER  scp->sc_esp
+
+#   endif
+
+#  else
+/* Use signal handlers with SA_SIGINFO.  */
+
+#   define SIGSEGV_FAULT_HANDLER_ARGLIST  int sig, siginfo_t *sip, void *scp
+#   define SIGSEGV_FAULT_ADDRESS  sip->si_addr
+#   define SIGSEGV_FAULT_CONTEXT  ((struct sigcontext *) scp)
+#   define SIGSEGV_FAULT_ADDRESS_FROM_SIGINFO
+
+/* See sys/x86/include/signal.h.  */
+
+#   if defined __x86_64__
+/* 64 bit registers */
+
+#    define SIGSEGV_FAULT_STACKPOINTER  ((struct sigcontext *) scp)->sc_rsp
+
+#   elif defined __i386__
+/* 32 bit registers */
+
+#    define SIGSEGV_FAULT_STACKPOINTER  ((struct sigcontext *) scp)->sc_esp
+
+#   endif
+
+#  endif
+
+# endif
+
+#endif
+
+#if defined __NetBSD__ /* NetBSD */
+
+# define SIGSEGV_FAULT_HANDLER_ARGLIST  int sig, siginfo_t *sip, void *ucp
+# define SIGSEGV_FAULT_ADDRESS  sip->si_addr
+# define SIGSEGV_FAULT_CONTEXT  ((ucontext_t *) ucp)
+# define SIGSEGV_FAULT_ADDRESS_FROM_SIGINFO
+
+/* _UC_MACHINE_SP is a platform independent macro.
+   Defined in <machine/mcontext.h>, see
+     http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/arch/$arch/include/mcontext.h
+   Supported on alpha, amd64, i386, ia64, m68k, mips, powerpc, sparc since
+   NetBSD 2.0.
+   On i386, _UC_MACHINE_SP is the same as ->uc_mcontext.__gregs[_REG_UESP],
+   and apparently the same value as       ->uc_mcontext.__gregs[_REG_ESP]. */
+# ifdef _UC_MACHINE_SP
+#  define SIGSEGV_FAULT_STACKPOINTER  _UC_MACHINE_SP ((ucontext_t *) ucp)
+# endif
+
+#endif
+
+#if defined __OpenBSD__ /* OpenBSD */
+
+# define SIGSEGV_FAULT_HANDLER_ARGLIST  int sig, siginfo_t *sip, struct sigcontext *scp
+# define SIGSEGV_FAULT_ADDRESS  sip->si_addr
+# define SIGSEGV_FAULT_CONTEXT  scp
+# define SIGSEGV_FAULT_ADDRESS_FROM_SIGINFO
+
+# if defined __alpha__
+
+/* See the definition of 'struct sigcontext' in
+   openbsd-src/sys/arch/alpha/include/signal.h.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  scp->sc_regs[30]
+
+# elif defined __arm__ || defined __armhf__
+
+/* See the definition of 'struct sigcontext' in
+   openbsd-src/sys/arch/arm/include/signal.h.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  scp->sc_usr_sp
+
+# elif defined __hppa__ || defined __hppa64__
+
+/* See the definition of 'struct sigcontext' in
+   openbsd-src/sys/arch/hppa/include/signal.h
+   and
+   openbsd-src/sys/arch/hppa64/include/signal.h.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  scp->sc_regs[30]
+
+# elif defined __x86_64__
+/* 64 bit registers */
+
+/* See the definition of 'struct sigcontext' in
+   openbsd-src/sys/arch/amd64/include/signal.h.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  scp->sc_rsp
+
+# elif defined __i386__
+/* 32 bit registers */
+
+/* See the definition of 'struct sigcontext' in
+   openbsd-src/sys/arch/i386/include/signal.h.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  scp->sc_esp
+
+# elif defined __m68k__
+
+/* See the definition of 'struct sigcontext' in
+   openbsd-src/sys/arch/m68k/include/signal.h.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  scp->sc_sp
+
+# elif defined __m88k__
+
+/* See the definition of 'struct sigcontext' in
+   openbsd-src/sys/arch/m88k/include/signal.h
+   and the definition of 'struct reg' in
+   openbsd-src/sys/arch/m88k/include/reg.h.  */
+
+#  if OpenBSD >= 201211 /* OpenBSD version >= 5.2 */
+#   define SIGSEGV_FAULT_STACKPOINTER  scp->sc_regs[31]
+#  else
+#   define SIGSEGV_FAULT_STACKPOINTER  scp->sc_regs.r[31]
+#  endif
+
+# elif defined __mips__ || defined __mipsn32__ || defined __mips64__
+
+/* See the definition of 'struct sigcontext' in
+   openbsd-src/sys/arch/mips64/include/signal.h.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  scp->sc_regs[29]
+
+# elif defined __powerpc__ || defined __powerpc64__
+
+/* See the definition of 'struct sigcontext' and 'struct trapframe' in
+   openbsd-src/sys/arch/powerpc/include/signal.h.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  scp->sc_frame.fixreg[1]
+
+# elif defined __sh__
+
+/* See the definition of 'struct sigcontext' in
+   openbsd-src/sys/arch/sh/include/signal.h
+   and the definition of 'struct reg' in
+   openbsd-src/sys/arch/sh/include/reg.h.  */
+
+#  if OpenBSD >= 201211 /* OpenBSD version >= 5.2 */
+#   define SIGSEGV_FAULT_STACKPOINTER  scp->sc_reg[20-15]
+#  else
+#   define SIGSEGV_FAULT_STACKPOINTER  scp->sc_reg.r_r15
+#  endif
+
+# elif defined __sparc__ || defined __sparc64__
+
+/* See the definition of 'struct sigcontext' in
+   openbsd-src/sys/arch/sparc/include/signal.h
+   and
+   openbsd-src/sys/arch/sparc64/include/signal.h.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  scp->sc_sp
+
+# elif defined __vax__
+
+/* See the definition of 'struct sigcontext' in
+   openbsd-src/sys/arch/vax/include/signal.h.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  scp->sc_sp
+
+# endif
+
+#endif
+
+#if (defined __APPLE__ && defined __MACH__) /* macOS */
+
+# define SIGSEGV_FAULT_HANDLER_ARGLIST  int sig, siginfo_t *sip, void *ucp
+# define SIGSEGV_FAULT_ADDRESS  sip->si_addr
+# define SIGSEGV_FAULT_CONTEXT  ((ucontext_t *) ucp)
+# define SIGSEGV_FAULT_ADDRESS_FROM_SIGINFO
+
+# if defined __x86_64__
+
+/* See the definitions of
+     - 'ucontext_t' and 'struct __darwin_ucontext' in <sys/_types/_ucontext.h>,
+     - 'struct __darwin_mcontext64' in <i386/_mcontext.h>, and
+     - 'struct __darwin_x86_thread_state64' in <mach/i386/_structs.h>.  */
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext->__ss.__rsp
+
+# elif defined __i386__
+
+/* See the definitions of
+     - 'ucontext_t' and 'struct __darwin_ucontext' in <sys/_types/_ucontext.h>,
+     - 'struct __darwin_mcontext32' in <i386/_mcontext.h>, and
+     - 'struct __darwin_i386_thread_state' in <mach/i386/_structs.h>.  */
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext->__ss.__esp
+
+# elif defined __arm64__
+
+/* See the definitions of
+     - 'ucontext_t' and 'struct __darwin_ucontext' in <sys/_types/_ucontext.h>,
+     - 'struct __darwin_mcontext64' in <arm/_mcontext.h>, and
+     - 'struct __darwin_arm_thread_state64' in <mach/arm/_structs.h>.  */
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext->__ss.__sp
+
+# elif defined __powerpc__
+
+/* See the definitions of
+     - 'ucontext_t' and 'struct __darwin_ucontext' in <sys/_structs.h>,
+     - 'struct __darwin_mcontext' in <ppc/_structs.h>, and
+     - 'struct __darwin_ppc_thread_state' in <mach/ppc/_structs.h>.  */
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext->__ss.__r1
+
+# endif
+
+#endif
+
+#if defined _AIX /* AIX */
+
+# define SIGSEGV_FAULT_HANDLER_ARGLIST  int sig, siginfo_t *sip, void *ucp
+# define SIGSEGV_FAULT_ADDRESS  sip->si_addr
+# define SIGSEGV_FAULT_CONTEXT  ((ucontext_t *) ucp)
+# define SIGSEGV_FAULT_ADDRESS_FROM_SIGINFO
+
+# if defined __powerpc__ || defined __powerpc64__
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.jmp_context.gpr[1]
+# endif
+
+#endif
+
+#if defined __sgi /* IRIX */
+
+# define SIGSEGV_FAULT_HANDLER_ARGLIST  int sig, int code, struct sigcontext *scp
+# define SIGSEGV_FAULT_ADDRESS  (unsigned long) scp->sc_badvaddr
+# define SIGSEGV_FAULT_CONTEXT  scp
+
+# if defined __mips__ || defined __mipsn32__ || defined __mips64__
+#  define SIGSEGV_FAULT_STACKPOINTER  scp->sc_regs[29]
+# endif
+
+#endif
+
+#if defined __sun /* Solaris */
+
+# define SIGSEGV_FAULT_HANDLER_ARGLIST  int sig, siginfo_t *sip, void *ucp
+# define SIGSEGV_FAULT_ADDRESS  sip->si_addr
+# define SIGSEGV_FAULT_CONTEXT  ((ucontext_t *) ucp)
+# define SIGSEGV_FAULT_ADDRESS_FROM_SIGINFO
+
+# if defined __x86_64__
+/* 64 bit registers */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.gregs[REG_RSP]
+
+# elif defined __i386__
+/* 32 bit registers */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.gregs[ESP]
+
+# elif defined __sparc__ || defined __sparc64__
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.gregs[REG_O6]
+
+#  if SOLARIS11
+
+/* On Solaris 11.3/SPARC, both in 32-bit and 64-bit mode, when catching
+   stack overflow, the fault address is correct the first time, but is zero
+   or near zero the second time.
+   'truss tests/test-sigsegv-catch-stackoverflow1' shows it:
+
+   In 32-bit mode:
+
+    Incurred fault #6, FLTBOUNDS  %pc = 0x000116E8
+      siginfo: SIGSEGV SEGV_MAPERR addr=0xFFB00000
+    Received signal #11, SIGSEGV [caught]
+      siginfo: SIGSEGV SEGV_MAPERR addr=0xFFB00000
+   then
+    Incurred fault #6, FLTBOUNDS  %pc = 0x000116E8
+      siginfo: SIGSEGV SEGV_MAPERR addr=0x00000008
+    Received signal #11, SIGSEGV [caught]
+      siginfo: SIGSEGV SEGV_MAPERR addr=0x00000008
+
+   In 64-bit mode:
+
+    Incurred fault #6, FLTBOUNDS  %pc = 0x100001C58
+      siginfo: SIGSEGV SEGV_MAPERR addr=0xFFFFFFFF7FF00000
+    Received signal #11, SIGSEGV [caught]
+      siginfo: SIGSEGV SEGV_MAPERR addr=0xFFFFFFFF7FF00000
+   then
+    Incurred fault #6, FLTBOUNDS  %pc = 0x100001C58
+      siginfo: SIGSEGV SEGV_MAPERR addr=0x00000000
+    Received signal #11, SIGSEGV [caught]
+      siginfo: SIGSEGV SEGV_MAPERR addr=0x00000000
+ */
+#   define BOGUS_FAULT_ADDRESS_UPON_STACK_OVERFLOW
+
+#  endif
+
+# endif
+
+#endif
+
+#if defined __CYGWIN__ /* Cygwin */
+
+# define SIGSEGV_FAULT_HANDLER_ARGLIST  int sig, siginfo_t *sip, void *ucp
+# define SIGSEGV_FAULT_ADDRESS  sip->si_addr
+# define SIGSEGV_FAULT_CONTEXT  ((ucontext_t *) ucp)
+# define SIGSEGV_FAULT_ADDRESS_FROM_SIGINFO
+
+/* See the definition of 'ucontext_t' in <sys/ucontext.h> and
+   of 'struct __mcontext' in <cygwin/signal.h>.  */
+# if defined __x86_64__
+/* 64 bit registers */
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.rsp
+# elif defined __i386__
+/* 32 bit registers */
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.esp
+# endif
+
+#endif
+
+#if defined __HAIKU__ /* Haiku */
+
+# define SIGSEGV_FAULT_HANDLER_ARGLIST  int sig, siginfo_t *sip, void *ucp
+# define SIGSEGV_FAULT_ADDRESS  sip->si_addr
+# define SIGSEGV_FAULT_CONTEXT  ((ucontext_t *) ucp)
+# define SIGSEGV_FAULT_ADDRESS_FROM_SIGINFO
+
+# if defined __x86_64__
+/* 64 bit registers */
+
+/* See the definition of 'ucontext_t' in <signal.h> and
+   of 'struct vregs' in <arch/x86_64/signal.h>.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.rsp
+
+# elif defined __i386__
+/* 32 bit registers */
+
+/* See the definition of 'ucontext_t' in <signal.h> and
+   of 'struct vregs' in <arch/x86/signal.h>.  */
+
+#  define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.esp
+
+# endif
+
+#endif
+
+/* ========================================================================== */
+
+/* List of signals that are sent when an invalid virtual memory address
+   is accessed, or when the stack overflows.  */
+#if defined __GNU__ \
+    || defined __FreeBSD_kernel__ || defined __FreeBSD__ || defined __DragonFly__ \
+    || defined __NetBSD__ || defined __OpenBSD__ \
+    || (defined __APPLE__ && defined __MACH__)
+# define SIGSEGV_FOR_ALL_SIGNALS(var,body) \
+    { int var; var = SIGSEGV; { body } var = SIGBUS; { body } }
+#else
+# define SIGSEGV_FOR_ALL_SIGNALS(var,body) \
+    { int var; var = SIGSEGV; { body } }
+#endif
+
+/* ========================================================================== */
+
+/* Determine the virtual memory area of a given address.  */
+#include "stackvma.h"
+
+/* ========================================================================== */
+
+/* On the average Unix platform, we define
+
+   HAVE_SIGSEGV_RECOVERY
+       if there is a fault-*.h include file which defines
+       SIGSEGV_FAULT_HANDLER_ARGLIST and SIGSEGV_FAULT_ADDRESS.
+
+   HAVE_STACK_OVERFLOW_RECOVERY
+       if HAVE_SIGALTSTACK is set and
+       at least two of the following are true:
+       A) There is a fault-*.h include file which defines
+          SIGSEGV_FAULT_HANDLER_ARGLIST and SIGSEGV_FAULT_ADDRESS.
+       B) There is a fault-*.h include file which defines
+          SIGSEGV_FAULT_HANDLER_ARGLIST and SIGSEGV_FAULT_STACKPOINTER.
+       C) There is a stackvma-*.c, other than stackvma-none.c, which
+          defines sigsegv_get_vma.
+
+   Why? Obviously, to catch stack overflow, we need an alternate signal
+   stack; this requires kernel support. But we also need to distinguish
+   (with a reasonable confidence) a stack overflow from a regular SIGSEGV.
+   If we have A) and B), we use the
+     Heuristic AB: If the fault address is near the stack pointer, it's a
+     stack overflow.
+   If we have A) and C), we use the
+     Heuristic AC: If the fault address is near and beyond the bottom of
+     the stack's virtual memory area, it's a stack overflow.
+   If we have B) and C), we use the
+     Heuristic BC: If the stack pointer is near the bottom of the stack's
+     virtual memory area, it's a stack overflow.
+     This heuristic comes in two flavours: On OSes which let the stack's
+     VMA grow continuously, we determine the bottom by use of getrlimit().
+     On OSes which preallocate the stack's VMA with its maximum size
+     (like BeOS), we use the stack's VMA directly.
+ */
+
+#if HAVE_SIGSEGV_RECOVERY \
+     && !(defined SIGSEGV_FAULT_HANDLER_ARGLIST && defined SIGSEGV_FAULT_ADDRESS)
+# error "You need to define SIGSEGV_FAULT_HANDLER_ARGLIST and SIGSEGV_FAULT_ADDRESS before you can define HAVE_SIGSEGV_RECOVERY."
+#endif
+#if !HAVE_SIGSEGV_RECOVERY \
+    && (defined SIGSEGV_FAULT_HANDLER_ARGLIST && defined SIGSEGV_FAULT_ADDRESS) \
+    && !(defined __FreeBSD__ && (defined __sparc__ || defined __sparc64__))
+# if __GNUC__ || (__clang_major__ >= 4)
+#  warning "You can define HAVE_SIGSEGV_RECOVERY on this platform."
+# else
+#  error "You can define HAVE_SIGSEGV_RECOVERY on this platform."
+# endif
+#endif
+
+#if HAVE_STACK_OVERFLOW_RECOVERY \
+    && !(defined SIGSEGV_FAULT_ADDRESS + defined SIGSEGV_FAULT_STACKPOINTER + HAVE_STACKVMA >= 2)
+# error "You need to define two of SIGSEGV_FAULT_ADDRESS, SIGSEGV_FAULT_STACKPOINTER, HAVE_STACKVMA, before you can define HAVE_STACK_OVERFLOW_RECOVERY."
+#endif
+#if !HAVE_STACK_OVERFLOW_RECOVERY \
+    && (defined SIGSEGV_FAULT_ADDRESS + defined SIGSEGV_FAULT_STACKPOINTER + HAVE_STACKVMA >= 2) \
+    && !(defined __FreeBSD__ && (defined __sparc__ || defined __sparc64__)) \
+    && !(defined __NetBSD__ && (defined __sparc__ || defined __sparc64__))
+# if __GNUC__ || (__clang_major__ >= 4)
+#  warning "You can define HAVE_STACK_OVERFLOW_RECOVERY on this platform."
+# else
+#  error "You can define HAVE_STACK_OVERFLOW_RECOVERY on this platform."
+# endif
+#endif
+
+/* ========================================================================== */
+
+#if HAVE_STACK_OVERFLOW_RECOVERY
+
+/* ======= Leaving a signal handler executing on the alternate stack ======= */
+
+/* Platform dependent:
+   Leaving a signal handler executing on the alternate stack.  */
+static void sigsegv_reset_onstack_flag (void);
+
+/* -------------------------- leave-sigaltstack.c -------------------------- */
+
+# if defined __GNU__ \
+     || defined __FreeBSD_kernel__ || defined __FreeBSD__ || defined __DragonFly__ \
+     || defined __NetBSD__ || defined __OpenBSD__
+
+static void
+sigsegv_reset_onstack_flag (void)
+{
+  stack_t ss;
+
+  if (sigaltstack (NULL, &ss) >= 0)
+    {
+      ss.ss_flags &= ~SS_ONSTACK;
+      sigaltstack (&ss, NULL);
+    }
+}
+
+/* --------------------------- leave-setcontext.c --------------------------- */
+
+# elif defined __sgi || defined __sun /* IRIX, Solaris */
+
+#  include <ucontext.h>
+
+static void
+sigsegv_reset_onstack_flag (void)
+{
+  ucontext_t uc;
+
+  if (getcontext (&uc) >= 0)
+    /* getcontext returns twice.  We are interested in the returned context
+       only the first time, i.e. when the SS_ONSTACK bit is set.  */
+    if (uc.uc_stack.ss_flags & SS_ONSTACK)
+      {
+        uc.uc_stack.ss_flags &= ~SS_ONSTACK;
+        /* Note that setcontext() does not refill uc.  Therefore if
+           setcontext() keeps SS_ONSTACK set in the kernel, either
+           setcontext() will return -1 or getcontext() will return a
+           second time, with the SS_ONSTACK bit being cleared.  */
+        setcontext (&uc);
+      }
+}
+
+/* ------------------------------ leave-nop.c ------------------------------ */
+
+# else
+
+static void
+sigsegv_reset_onstack_flag (void)
+{
+  /* Nothing to do. sigaltstack() simply looks at the stack pointer,
+     therefore SS_ONSTACK is not sticky.  */
+}
+
+# endif
+
+/* ========================================================================== */
+
+# if HAVE_STACKVMA
+
+/* Address of the last byte belonging to the stack vma.  */
+static uintptr_t stack_top = 0;
+
+/* Needs to be called once only.  */
+static void
+remember_stack_top (void *some_variable_on_stack)
+{
+  struct vma_struct vma;
+
+  if (sigsegv_get_vma ((uintptr_t) some_variable_on_stack, &vma) >= 0)
+    stack_top = vma.end - 1;
+}
+
+# endif /* HAVE_STACKVMA */
+
+static stackoverflow_handler_t stk_user_handler = (stackoverflow_handler_t)NULL;
+static uintptr_t stk_extra_stack;
+static size_t stk_extra_stack_size;
+
+#endif /* HAVE_STACK_OVERFLOW_RECOVERY */
+
+#if HAVE_SIGSEGV_RECOVERY
+
+/* User's SIGSEGV handler.  */
+static sigsegv_handler_t user_handler = (sigsegv_handler_t)NULL;
+
+#endif /* HAVE_SIGSEGV_RECOVERY */
+
+
+/* Our SIGSEGV handler, with OS dependent argument list.  */
+
+#if HAVE_SIGSEGV_RECOVERY
+
+static void
+sigsegv_handler (SIGSEGV_FAULT_HANDLER_ARGLIST)
+{
+  void *address = (void *) (SIGSEGV_FAULT_ADDRESS);
+
+# if HAVE_STACK_OVERFLOW_RECOVERY
+#  if !(HAVE_STACKVMA || defined SIGSEGV_FAULT_STACKPOINTER)
+#error "Insufficient heuristics for detecting a stack overflow.  Either define CFG_STACKVMA and HAVE_STACKVMA correctly, or define SIGSEGV_FAULT_STACKPOINTER correctly, or undefine HAVE_STACK_OVERFLOW_RECOVERY!"
+#  endif
+
+  /* Call user's handler.  */
+  if (user_handler && (*user_handler) (address, 0))
+    {
+      /* Handler successful.  */
+    }
+  else
+    {
+      /* Handler declined responsibility.  */
+
+      /* Did the user install a stack overflow handler?  */
+      if (stk_user_handler)
+        {
+          /* See whether it was a stack overflow. If so, longjump away.  */
+#  ifdef SIGSEGV_FAULT_STACKPOINTER
+          uintptr_t old_sp = (uintptr_t) (SIGSEGV_FAULT_STACKPOINTER);
+#   ifdef __ia64
+          uintptr_t old_bsp = (uintptr_t) (SIGSEGV_FAULT_BSP_POINTER);
+#   endif
+#  endif
+
+#  if HAVE_STACKVMA
+          /* Were we able to determine the stack top?  */
+          if (stack_top)
+            {
+              /* Determine stack bounds.  */
+              int saved_errno;
+              struct vma_struct vma;
+              int ret;
+
+              saved_errno = errno;
+              ret = sigsegv_get_vma (stack_top, &vma);
+              errno = saved_errno;
+              if (ret >= 0)
+                {
+#   ifndef BOGUS_FAULT_ADDRESS_UPON_STACK_OVERFLOW
+                  /* Heuristic AC: If the fault_address is nearer to the stack
+                     segment's [start,end] than to the previous segment, we
+                     consider it a stack overflow.
+                     In the case of IA-64, we know that the previous segment
+                     is the up-growing bsp segment, and either of the two
+                     stacks can overflow.  */
+                  uintptr_t addr = (uintptr_t) address;
+
+#    ifdef __ia64
+                  if (addr >= vma.prev_end && addr <= vma.end - 1)
+#    else
+#     if STACK_DIRECTION < 0
+                  if (addr >= vma.start
+                      ? (addr <= vma.end - 1)
+                      : vma.is_near_this (addr, &vma))
+#     else
+                  if (addr <= vma.end - 1
+                      ? (addr >= vma.start)
+                      : vma.is_near_this (addr, &vma))
+#     endif
+#    endif
+                    {
+#   else /* BOGUS_FAULT_ADDRESS_UPON_STACK_OVERFLOW */
+#    if HAVE_GETRLIMIT && defined RLIMIT_STACK
+                  /* Heuristic BC: If the stack size has reached its maximal size,
+                     and old_sp is near the low end, we consider it a stack
+                     overflow.  */
+                  struct rlimit rl;
+
+                  saved_errno = errno;
+                  ret = getrlimit (RLIMIT_STACK, &rl);
+                  errno = saved_errno;
+                  if (ret >= 0)
+                    {
+                      uintptr_t current_stack_size = vma.end - vma.start;
+                      uintptr_t max_stack_size = rl.rlim_cur;
+                      if (current_stack_size <= max_stack_size + 4096
+                          && max_stack_size <= current_stack_size + 4096
+#    else
+                    {
+                      if (1
+#    endif
+#    ifdef SIGSEGV_FAULT_STACKPOINTER
+                          /* Heuristic BC: If we know old_sp, and it is neither
+                             near the low end, nor in the alternate stack, then
+                             it's probably not a stack overflow.  */
+                          && ((old_sp >= stk_extra_stack
+                               && old_sp <= stk_extra_stack + stk_extra_stack_size)
+#     if STACK_DIRECTION < 0
+                              || (old_sp <= vma.start + 4096
+                                  && vma.start <= old_sp + 4096))
+#     else
+                              || (old_sp <= vma.end + 4096
+                                  && vma.end <= old_sp + 4096))
+#     endif
+#    endif
+                         )
+#   endif /* BOGUS_FAULT_ADDRESS_UPON_STACK_OVERFLOW */
+#  else /* !HAVE_STACKVMA */
+          /* Heuristic AB: If the fault address is near the stack pointer,
+             it's a stack overflow.  */
+          uintptr_t addr = (uintptr_t) address;
+
+          if ((addr <= old_sp + 4096 && old_sp <= addr + 4096)
+#   ifdef __ia64
+              || (addr <= old_bsp + 4096 && old_bsp <= addr + 4096)
+#   endif
+             )
+            {
+                {
+                    {
+#  endif /* !HAVE_STACKVMA */
+                        {
+#  ifdef SIGSEGV_FAULT_STACKPOINTER
+                          int emergency =
+                            (old_sp >= stk_extra_stack
+                             && old_sp <= stk_extra_stack + stk_extra_stack_size);
+                          stackoverflow_context_t context = (SIGSEGV_FAULT_CONTEXT);
+#  else
+                          int emergency = 0;
+                          stackoverflow_context_t context = (void *) 0;
+#  endif
+                          /* Call user's handler.  */
+                          (*stk_user_handler) (emergency, context);
+                        }
+                    }
+                }
+            }
+        }
+# endif /* HAVE_STACK_OVERFLOW_RECOVERY */
+
+      if (user_handler && (*user_handler) (address, 1))
+        {
+          /* Handler successful.  */
+        }
+      else
+        {
+          /* Handler declined responsibility for real.  */
+
+          /* Remove ourselves and dump core.  */
+          SIGSEGV_FOR_ALL_SIGNALS (signo, signal (signo, SIG_DFL);)
+        }
+
+# if HAVE_STACK_OVERFLOW_RECOVERY
+    }
+# endif /* HAVE_STACK_OVERFLOW_RECOVERY */
+}
+
+#elif HAVE_STACK_OVERFLOW_RECOVERY
+
+static void
+# ifdef SIGSEGV_FAULT_STACKPOINTER
+sigsegv_handler (SIGSEGV_FAULT_HANDLER_ARGLIST)
+# else
+sigsegv_handler (int sig)
+# endif
+{
+# if !((HAVE_GETRLIMIT && defined RLIMIT_STACK) || defined SIGSEGV_FAULT_STACKPOINTER)
+#  error "Insufficient heuristics for detecting a stack overflow.  Either define SIGSEGV_FAULT_STACKPOINTER correctly, or undefine HAVE_STACK_OVERFLOW_RECOVERY!"
+# endif
+
+  /* Did the user install a handler?  */
+  if (stk_user_handler)
+    {
+      /* See whether it was a stack overflow.  If so, longjump away.  */
+# ifdef SIGSEGV_FAULT_STACKPOINTER
+      uintptr_t old_sp = (uintptr_t) (SIGSEGV_FAULT_STACKPOINTER);
+# endif
+
+      /* Were we able to determine the stack top?  */
+      if (stack_top)
+        {
+          /* Determine stack bounds.  */
+          int saved_errno;
+          struct vma_struct vma;
+          int ret;
+
+          saved_errno = errno;
+          ret = sigsegv_get_vma (stack_top, &vma);
+          errno = saved_errno;
+          if (ret >= 0)
+            {
+# if HAVE_GETRLIMIT && defined RLIMIT_STACK
+              /* Heuristic BC: If the stack size has reached its maximal size,
+                 and old_sp is near the low end, we consider it a stack
+                 overflow.  */
+              struct rlimit rl;
+
+              saved_errno = errno;
+              ret = getrlimit (RLIMIT_STACK, &rl);
+              errno = saved_errno;
+              if (ret >= 0)
+                {
+                  uintptr_t current_stack_size = vma.end - vma.start;
+                  uintptr_t max_stack_size = rl.rlim_cur;
+                  if (current_stack_size <= max_stack_size + 4096
+                      && max_stack_size <= current_stack_size + 4096
+# else
+                {
+                  if (1
+# endif
+# ifdef SIGSEGV_FAULT_STACKPOINTER
+                      /* Heuristic BC: If we know old_sp, and it is neither
+                         near the low end, nor in the alternate stack, then
+                         it's probably not a stack overflow.  */
+                      && ((old_sp >= stk_extra_stack
+                           && old_sp <= stk_extra_stack + stk_extra_stack_size)
+#  if STACK_DIRECTION < 0
+                          || (old_sp <= vma.start + 4096
+                              && vma.start <= old_sp + 4096))
+#  else
+                          || (old_sp <= vma.end + 4096
+                              && vma.end <= old_sp + 4096))
+#  endif
+# endif
+                     )
+                    {
+# ifdef SIGSEGV_FAULT_STACKPOINTER
+                      int emergency =
+                        (old_sp >= stk_extra_stack
+                         && old_sp <= stk_extra_stack + stk_extra_stack_size);
+                      stackoverflow_context_t context = (SIGSEGV_FAULT_CONTEXT);
+# else
+                      int emergency = 0;
+                      stackoverflow_context_t context = (void *) 0;
+# endif
+                      /* Call user's handler.  */
+                      (*stk_user_handler)(emergency,context);
+                    }
+                }
+            }
+        }
+    }
+
+  /* Remove ourselves and dump core.  */
+  SIGSEGV_FOR_ALL_SIGNALS (signo, signal (signo, SIG_DFL);)
+}
+
+#endif
+
+
+#if HAVE_SIGSEGV_RECOVERY || HAVE_STACK_OVERFLOW_RECOVERY
+
+static void
+install_for (int sig)
+{
+  struct sigaction action;
+
+# ifdef SIGSEGV_FAULT_ADDRESS_FROM_SIGINFO
+  action.sa_sigaction = &sigsegv_handler;
+# else
+  action.sa_handler = (void (*) (int)) &sigsegv_handler;
+# endif
+  /* Block most signals while SIGSEGV is being handled.  */
+  /* Signals SIGKILL, SIGSTOP cannot be blocked.  */
+  /* Signals SIGCONT, SIGTSTP, SIGTTIN, SIGTTOU are not blocked because
+     dealing with these signals seems dangerous.  */
+  /* Signals SIGILL, SIGABRT, SIGFPE, SIGSEGV, SIGTRAP, SIGIOT, SIGEMT, SIGBUS,
+     SIGSYS, SIGSTKFLT are not blocked because these are synchronous signals,
+     which may require immediate intervention, otherwise the process may
+     starve.  */
+  sigemptyset (&action.sa_mask);
+# ifdef SIGHUP
+  sigaddset (&action.sa_mask,SIGHUP);
+# endif
+# ifdef SIGINT
+  sigaddset (&action.sa_mask,SIGINT);
+# endif
+# ifdef SIGQUIT
+  sigaddset (&action.sa_mask,SIGQUIT);
+# endif
+# ifdef SIGPIPE
+  sigaddset (&action.sa_mask,SIGPIPE);
+# endif
+# ifdef SIGALRM
+  sigaddset (&action.sa_mask,SIGALRM);
+# endif
+# ifdef SIGTERM
+  sigaddset (&action.sa_mask,SIGTERM);
+# endif
+# ifdef SIGUSR1
+  sigaddset (&action.sa_mask,SIGUSR1);
+# endif
+# ifdef SIGUSR2
+  sigaddset (&action.sa_mask,SIGUSR2);
+# endif
+# ifdef SIGCHLD
+  sigaddset (&action.sa_mask,SIGCHLD);
+# endif
+# ifdef SIGCLD
+  sigaddset (&action.sa_mask,SIGCLD);
+# endif
+# ifdef SIGURG
+  sigaddset (&action.sa_mask,SIGURG);
+# endif
+# ifdef SIGIO
+  sigaddset (&action.sa_mask,SIGIO);
+# endif
+# ifdef SIGPOLL
+  sigaddset (&action.sa_mask,SIGPOLL);
+# endif
+# ifdef SIGXCPU
+  sigaddset (&action.sa_mask,SIGXCPU);
+# endif
+# ifdef SIGXFSZ
+  sigaddset (&action.sa_mask,SIGXFSZ);
+# endif
+# ifdef SIGVTALRM
+  sigaddset (&action.sa_mask,SIGVTALRM);
+# endif
+# ifdef SIGPROF
+  sigaddset (&action.sa_mask,SIGPROF);
+# endif
+# ifdef SIGPWR
+  sigaddset (&action.sa_mask,SIGPWR);
+# endif
+# ifdef SIGLOST
+  sigaddset (&action.sa_mask,SIGLOST);
+# endif
+# ifdef SIGWINCH
+  sigaddset (&action.sa_mask,SIGWINCH);
+# endif
+  /* Note that sigaction() implicitly adds sig itself to action.sa_mask.  */
+  /* Ask the OS to provide a structure siginfo_t to the handler.  */
+# ifdef SIGSEGV_FAULT_ADDRESS_FROM_SIGINFO
+  action.sa_flags = SA_SIGINFO;
+# else
+  action.sa_flags = 0;
+# endif
+# if HAVE_STACK_OVERFLOW_RECOVERY && HAVE_SIGALTSTACK /* not BeOS */
+  /* Work around Linux 2.2.5 bug: If SA_ONSTACK is specified but sigaltstack()
+     has not been called, the kernel will busy loop, eating CPU time.  So
+     avoid setting SA_ONSTACK until the user has requested stack overflow
+     handling.  */
+  if (stk_user_handler)
+    action.sa_flags |= SA_ONSTACK;
+# endif
+  sigaction (sig, &action, (struct sigaction *) NULL);
+}
+
+#endif /* HAVE_SIGSEGV_RECOVERY || HAVE_STACK_OVERFLOW_RECOVERY */
+
+int
+sigsegv_install_handler (sigsegv_handler_t handler)
+{
+#if HAVE_SIGSEGV_RECOVERY
+  user_handler = handler;
+
+  SIGSEGV_FOR_ALL_SIGNALS (sig, install_for (sig);)
+
+  return 0;
+#else
+  return -1;
+#endif
+}
+
+void
+sigsegv_deinstall_handler (void)
+{
+#if HAVE_SIGSEGV_RECOVERY
+  user_handler = (sigsegv_handler_t)NULL;
+
+# if HAVE_STACK_OVERFLOW_RECOVERY
+  if (!stk_user_handler)
+# endif
+    {
+      SIGSEGV_FOR_ALL_SIGNALS (sig, signal (sig, SIG_DFL);)
+    }
+#endif
+}
+
+int
+sigsegv_leave_handler (void (*continuation) (void*, void*, void*),
+                       void* cont_arg1, void* cont_arg2, void* cont_arg3)
+{
+#if HAVE_STACK_OVERFLOW_RECOVERY
+  /*
+   * Reset the system's knowledge that we are executing on the alternate
+   * stack. If we didn't do that, siglongjmp would be needed instead of
+   * longjmp to leave the signal handler.
+   */
+  sigsegv_reset_onstack_flag ();
+#endif
+  (*continuation) (cont_arg1, cont_arg2, cont_arg3);
+  return 1;
+}
+
+int
+stackoverflow_install_handler (stackoverflow_handler_t handler,
+                               void *extra_stack, size_t extra_stack_size)
+{
+#if HAVE_STACK_OVERFLOW_RECOVERY
+# if HAVE_STACKVMA
+  if (!stack_top)
+    {
+      int dummy;
+      remember_stack_top (&dummy);
+      if (!stack_top)
+        return -1;
+    }
+# endif
+
+  stk_user_handler = handler;
+  stk_extra_stack = (uintptr_t) extra_stack;
+  stk_extra_stack_size = extra_stack_size;
+  {
+    stack_t ss;
+# if SIGALTSTACK_SS_REVERSED
+    ss.ss_sp = (char *) extra_stack + extra_stack_size - sizeof (void *);
+    ss.ss_size = extra_stack_size - sizeof (void *);
+# else
+    ss.ss_sp = extra_stack;
+    ss.ss_size = extra_stack_size;
+# endif
+    ss.ss_flags = 0; /* no SS_DISABLE */
+    if (sigaltstack (&ss, (stack_t*)0) < 0)
+      return -1;
+  }
+
+  /* Install the signal handlers with SA_ONSTACK.  */
+  SIGSEGV_FOR_ALL_SIGNALS (sig, install_for (sig);)
+  return 0;
+#else
+  return -1;
+#endif
+}
+
+void
+stackoverflow_deinstall_handler (void)
+{
+#if HAVE_STACK_OVERFLOW_RECOVERY
+  stk_user_handler = (stackoverflow_handler_t) NULL;
+
+# if HAVE_SIGSEGV_RECOVERY
+  if (user_handler)
+    {
+      /* Reinstall the signal handlers without SA_ONSTACK, to avoid Linux
+         bug.  */
+      SIGSEGV_FOR_ALL_SIGNALS (sig, install_for (sig);)
+    }
+  else
+# endif
+    {
+      SIGSEGV_FOR_ALL_SIGNALS (sig, signal (sig, SIG_DFL);)
+    }
+
+  {
+    stack_t ss;
+    ss.ss_flags = SS_DISABLE;
+    if (sigaltstack (&ss, (stack_t *) 0) < 0)
+      perror ("gnulib sigsegv (stackoverflow_deinstall_handler)");
+  }
+#endif
+}
diff --git a/src/grep/lib/sigsegv.in.h b/src/grep/lib/sigsegv.in.h
new file mode 100644
index 0000000..17ad87e
--- /dev/null
+++ b/src/grep/lib/sigsegv.in.h
@@ -0,0 +1,244 @@
+/* Page fault handling library.
+   Copyright (C) 1998-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible.  */
+
+#ifndef _SIGSEGV_H
+#define _SIGSEGV_H
+
+/* Get size_t.  */
+#include <stddef.h>
+
+/* Define the fault context structure.  */
+#if defined __linux__ || defined __ANDROID__ \
+    || (defined __FreeBSD__ && (defined __arm__ || defined __armhf__ || defined __arm64__)) \
+    || defined __NetBSD__ \
+    || defined _AIX || defined __sun \
+    || defined __CYGWIN__
+/* Linux, FreeBSD, NetBSD, AIX, Solaris, Cygwin */
+# include <ucontext.h>
+#elif (defined __APPLE__ && defined __MACH__)
+/* macOS */
+# include <sys/ucontext.h>
+#elif defined __HAIKU__
+/* Haiku */
+# include <signal.h>
+#endif
+
+/* Correct the value of SIGSTKSZ on some systems.
+   glibc >= 2.34: When _GNU_SOURCE is defined, SIGSTKSZ is no longer a
+   compile-time constant.  But most programs need a simple constant.
+   AIX 64-bit: original value 4096 is too small.
+   HP-UX: original value 8192 is too small.
+   Solaris 11/x86_64: original value 8192 is too small.  */
+#include <signal.h>
+#if __GLIBC__ >= 2
+# undef SIGSTKSZ
+# if defined __ia64__
+#  define SIGSTKSZ 262144
+# else
+#  define SIGSTKSZ 65536
+# endif
+#endif
+#if defined _AIX && defined _ARCH_PPC64
+# undef SIGSTKSZ
+# define SIGSTKSZ 8192
+#endif
+#if defined __hpux || (defined __sun && (defined __x86_64__ || defined __amd64__))
+# undef SIGSTKSZ
+# define SIGSTKSZ 16384
+#endif
+
+/* HAVE_SIGSEGV_RECOVERY
+   is defined if the system supports catching SIGSEGV.  */
+#if defined __linux__ || defined __ANDROID__ || defined __GNU__ \
+    || defined __FreeBSD_kernel__ || (defined __FreeBSD__ && !(defined __sparc__ || defined __sparc64__)) || defined __DragonFly__ \
+    || defined __NetBSD__ \
+    || defined __OpenBSD__ \
+    || (defined __APPLE__ && defined __MACH__) \
+    || defined _AIX || defined __sgi || defined __sun \
+    || defined __CYGWIN__ || defined __HAIKU__
+/* Linux, Hurd, GNU/kFreeBSD, FreeBSD, NetBSD, OpenBSD, macOS, AIX, IRIX, Solaris, Cygwin, Haiku */
+# define HAVE_SIGSEGV_RECOVERY 1
+#endif
+
+/* HAVE_STACK_OVERFLOW_RECOVERY
+   is defined if stack overflow can be caught.  */
+#if defined __linux__ || defined __ANDROID__ || defined __GNU__ \
+    || defined __FreeBSD_kernel__ || (defined __FreeBSD__ && !(defined __sparc__ || defined __sparc64__)) || defined __DragonFly__ \
+    || (defined __NetBSD__ && !(defined __sparc__ || defined __sparc64__)) \
+    || defined __OpenBSD__ \
+    || (defined __APPLE__ && defined __MACH__) \
+    || defined _AIX || defined __sgi || defined __sun \
+    || defined __CYGWIN__ || defined __HAIKU__
+/* Linux, Hurd, GNU/kFreeBSD, FreeBSD, NetBSD, OpenBSD, macOS, AIX, IRIX, Solaris, Cygwin, Haiku */
+# define HAVE_STACK_OVERFLOW_RECOVERY 1
+#endif
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define LIBSIGSEGV_VERSION 0x020D    /* version number: (major<<8) + minor */
+extern int libsigsegv_version;       /* Likewise */
+
+/* -------------------------------------------------------------------------- */
+
+#if 1 /* really only HAVE_SIGSEGV_RECOVERY */
+
+/*
+ * The mask of bits that are set to zero in a fault address that gets passed
+ * to a global SIGSEGV handler.
+ * On some platforms, the precise fault address is not known, only the memory
+ * page into which the fault address falls. This is apparently allowed by POSIX:
+ * <http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/signal.h.html>
+ * says: "For some implementations, the value of si_addr may be inaccurate."
+ * In this case, the returned fault address is rounded down to a multiple of
+ * getpagesize() = sysconf(_SC_PAGESIZE).
+ * On such platforms, we define SIGSEGV_FAULT_ADDRESS_ALIGNMENT to be an upper
+ * bound for getpagesize() (and, like getpagesize(), also a power of 2).
+ * On the platforms where the returned fault address is the precise one, we
+ * define SIGSEGV_FAULT_ADDRESS_ALIGNMENT to 1.
+ */
+# if defined __NetBSD__ && (defined __sparc__ || defined __sparc64__)
+  /* getpagesize () is 0x1000 or 0x2000, depending on hardware.  */
+#  define SIGSEGV_FAULT_ADDRESS_ALIGNMENT 0x2000UL
+# elif defined __linux__ && (defined __s390__ || defined __s390x__)
+  /* getpagesize () is 0x1000.  */
+#  define SIGSEGV_FAULT_ADDRESS_ALIGNMENT 0x1000UL
+# else
+#  define SIGSEGV_FAULT_ADDRESS_ALIGNMENT 1UL
+# endif
+
+/*
+ * The type of a global SIGSEGV handler.
+ * The fault address, with the bits (SIGSEGV_FAULT_ADDRESS_ALIGNMENT - 1)
+ * cleared, is passed as argument.
+ * The access type (read access or write access) is not passed; your handler
+ * has to know itself how to distinguish these two cases.
+ * The second argument is 0, meaning it could also be a stack overflow, or 1,
+ * meaning the handler should seriously try to fix the fault.
+ * The return value should be nonzero if the handler has done its job
+ * and no other handler should be called, or 0 if the handler declines
+ * responsibility for the given address.
+ *
+ * The handler is run at a moment when nothing about the global state of the
+ * program is known. Therefore it cannot use facilities that manipulate global
+ * variables or locks. In particular, it cannot use malloc(); use mmap()
+ * instead. It cannot use fopen(); use open() instead. Etc. All global
+ * variables that are accessed by the handler should be marked 'volatile'.
+ */
+typedef int (*sigsegv_handler_t) (void* fault_address, int serious);
+
+/*
+ * Installs a global SIGSEGV handler.
+ * This should be called once only, and it ignores any previously installed
+ * SIGSEGV handler.
+ * Returns 0 on success, or -1 if the system doesn't support catching SIGSEGV.
+ */
+extern int sigsegv_install_handler (sigsegv_handler_t handler);
+
+/*
+ * Deinstalls the global SIGSEGV handler.
+ * This goes back to the state where no SIGSEGV handler is installed.
+ */
+extern void sigsegv_deinstall_handler (void);
+
+/*
+ * Prepares leaving a SIGSEGV handler (through longjmp or similar means).
+ * Control is transferred by calling CONTINUATION with CONT_ARG1, CONT_ARG2,
+ * CONT_ARG3 as arguments.
+ * CONTINUATION must not return.
+ * The sigsegv_leave_handler function may return if called from a SIGSEGV
+ * handler; its return value should be used as the handler's return value.
+ * The sigsegv_leave_handler function does not return if called from a
+ * stack overflow handler.
+ */
+extern int sigsegv_leave_handler (void (*continuation) (void*, void*, void*), void* cont_arg1, void* cont_arg2, void* cont_arg3);
+
+#endif /* HAVE_SIGSEGV_RECOVERY */
+
+#if 1 /* really only HAVE_STACK_OVERFLOW_RECOVERY */
+
+/*
+ * The type of a context passed to a stack overflow handler.
+ * This type is system dependent; on some platforms it is an 'ucontext_t *',
+ * on some platforms it is a 'struct sigcontext *', on others merely an
+ * opaque 'void *'.
+ */
+# if defined __linux__ || defined __ANDROID__ \
+     || (defined __FreeBSD__ && (defined __arm__ || defined __armhf__ || defined __arm64__)) \
+     || defined __NetBSD__ \
+     || (defined __APPLE__ && defined __MACH__) \
+     || defined _AIX || defined __sun \
+     || defined __CYGWIN__ || defined __HAIKU__
+typedef ucontext_t *stackoverflow_context_t;
+# elif defined __GNU__ \
+       || defined __FreeBSD_kernel__ || (defined __FreeBSD__ && !(defined __sparc__ || defined __sparc64__)) || defined __DragonFly__ \
+       || defined __OpenBSD__ || defined __sgi
+typedef struct sigcontext *stackoverflow_context_t;
+# else
+typedef void *stackoverflow_context_t;
+# endif
+
+/*
+ * The type of a stack overflow handler.
+ * Such a handler should perform a longjmp call in order to reduce the amount
+ * of stack needed. It must not return.
+ * The emergency argument is 0 when the stack could be repared, or 1 if the
+ * application should better save its state and exit now.
+ *
+ * The handler is run at a moment when nothing about the global state of the
+ * program is known. Therefore it cannot use facilities that manipulate global
+ * variables or locks. In particular, it cannot use malloc(); use mmap()
+ * instead. It cannot use fopen(); use open() instead. Etc. All global
+ * variables that are accessed by the handler should be marked 'volatile'.
+ */
+typedef void (*stackoverflow_handler_t) (int emergency, stackoverflow_context_t scp);
+
+/*
+ * Installs a stack overflow handler.
+ * The extra_stack argument is a pointer to a pre-allocated area used as a
+ * stack for executing the handler. It typically comes from a static variable
+ * or from heap-allocated memoty; placing it on the main stack may fail on
+ * some operating systems.
+ * Its size, passed in extra_stack_size, should be sufficiently large.  The
+ * following code determines an appropriate size:
+ *   #include <signal.h>
+ *   #ifndef SIGSTKSZ         / * glibc defines SIGSTKSZ for this purpose * /
+ *   # define SIGSTKSZ 16384  / * on most platforms, 16 KB are sufficient * /
+ *   #endif
+ * Returns 0 on success, or -1 if the system doesn't support catching stack
+ * overflow.
+ */
+extern int stackoverflow_install_handler (stackoverflow_handler_t handler,
+                                          void* extra_stack, size_t extra_stack_size);
+
+/*
+ * Deinstalls the stack overflow handler.
+ */
+extern void stackoverflow_deinstall_handler (void);
+
+#endif /* HAVE_STACK_OVERFLOW_RECOVERY */
+
+/* -------------------------------------------------------------------------- */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SIGSEGV_H */
diff --git a/src/grep/lib/stackvma.c b/src/grep/lib/stackvma.c
new file mode 100644
index 0000000..a810afe
--- /dev/null
+++ b/src/grep/lib/stackvma.c
@@ -0,0 +1,2081 @@
+/* Determine the virtual memory area of a given address.
+   Copyright (C) 2002-2021 Free Software Foundation, Inc.
+   Copyright (C) 2003-2006  Paolo Bonzini <bonzini@gnu.org>
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible and Paolo Bonzini.  */
+
+#include <config.h>
+
+/* On Solaris in 32-bit mode, when gnulib module 'largefile' is in use,
+   prevent a compilation error
+     "Cannot use procfs in the large file compilation environment"
+   On Android, when targeting Android 4.4 or older with a GCC toolchain,
+   prevent a compilation error
+     "error: call to 'mmap' declared with attribute error: mmap is not
+      available with _FILE_OFFSET_BITS=64 when using GCC until android-21.
+      Either raise your minSdkVersion, disable _FILE_OFFSET_BITS=64, or
+      switch to Clang."
+   The files that we access in this compilation unit are less than 2 GB
+   large.  */
+#if defined __sun || defined __ANDROID__
+# undef _FILE_OFFSET_BITS
+#endif
+
+/* Specification.  */
+#include "stackvma.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+/* =========================== stackvma-simple.c =========================== */
+
+#if defined __linux__ || defined __ANDROID__ \
+    || defined __FreeBSD_kernel__ || defined __FreeBSD__ || defined __DragonFly__ \
+    || defined __NetBSD__ \
+    || (defined __APPLE__ && defined __MACH__) \
+    || defined __sgi || defined __sun \
+    || defined __CYGWIN__ || defined __HAIKU__
+
+/* This file contains the proximity test function for the simple cases, where
+   the OS has an API for enumerating the mapped ranges of virtual memory.  */
+
+# if STACK_DIRECTION < 0
+
+/* Info about the gap between this VMA and the previous one.
+   addr must be < vma->start.  */
+static int
+simple_is_near_this (uintptr_t addr, struct vma_struct *vma)
+{
+  return (vma->start - addr <= (vma->start - vma->prev_end) / 2);
+}
+
+# endif
+# if STACK_DIRECTION > 0
+
+/* Info about the gap between this VMA and the next one.
+   addr must be > vma->end - 1.  */
+static int
+simple_is_near_this (uintptr_t addr, struct vma_struct *vma)
+{
+  return (addr - vma->end < (vma->next_start - vma->end) / 2);
+}
+
+# endif
+
+#endif
+
+/* =========================== stackvma-rofile.c =========================== */
+/* Buffered read-only streams.  */
+
+#if defined __linux__ || defined __ANDROID__ \
+    || defined __FreeBSD_kernel__ || defined __FreeBSD__ || defined __DragonFly__ \
+    || defined __NetBSD__ \
+    || defined __CYGWIN__
+
+# include <errno.h> /* errno, EINTR */
+# include <fcntl.h> /* open, O_RDONLY */
+# include <stddef.h> /* size_t */
+# include <unistd.h> /* getpagesize, lseek, read, close */
+# include <sys/types.h>
+# include <sys/mman.h> /* mmap, munmap */
+
+# if defined __linux__ || defined __ANDROID__
+#  include <limits.h> /* PATH_MAX */
+# endif
+
+/* Buffered read-only streams.
+   We cannot use <stdio.h> here, because fopen() calls malloc(), and a malloc()
+   call may have been interrupted.
+   Also, we cannot use multiple read() calls, because if the buffer size is
+   smaller than the file's contents:
+     - On NetBSD, the second read() call would return 0, thus making the file
+       appear truncated.
+     - On DragonFly BSD, the first read() call would fail with errno = EFBIG.
+     - On all platforms, if some other thread is doing memory allocations or
+       deallocations between two read() calls, there is a high risk that the
+       result of these two read() calls don't fit together, and as a
+       consequence we will parse gargage and either omit some VMAs or return
+       VMAs with nonsensical addresses.
+   So use mmap(), and ignore the resulting VMA.
+   The stack-allocated buffer cannot be too large, because this can be called
+   when we are in the context of an alternate stack of just SIGSTKSZ bytes.  */
+
+# if defined __linux__ || defined __ANDROID__
+  /* On Linux, if the file does not entirely fit into the buffer, the read()
+     function stops before the line that would come out truncated.  The
+     maximum size of such a line is 73 + PATH_MAX bytes.  To be sure that we
+     have read everything, we must verify that at least that many bytes are
+     left when read() returned.  */
+#  define MIN_LEFTOVER (73 + PATH_MAX)
+# else
+#  define MIN_LEFTOVER 1
+# endif
+
+# if MIN_LEFTOVER < 1024
+#  define STACK_ALLOCATED_BUFFER_SIZE 1024
+# else
+  /* There is no point in using a stack-allocated buffer if it is too small
+     anyway.  */
+#  define STACK_ALLOCATED_BUFFER_SIZE 1
+# endif
+
+struct rofile
+  {
+    size_t position;
+    size_t filled;
+    int eof_seen;
+    /* These fields deal with allocation of the buffer.  */
+    char *buffer;
+    char *auxmap;
+    size_t auxmap_length;
+    uintptr_t auxmap_start;
+    uintptr_t auxmap_end;
+    char stack_allocated_buffer[STACK_ALLOCATED_BUFFER_SIZE];
+  };
+
+/* Open a read-only file stream.  */
+static int
+rof_open (struct rofile *rof, const char *filename)
+{
+  int fd;
+  uintptr_t pagesize;
+  size_t size;
+
+  fd = open (filename, O_RDONLY);
+  if (fd < 0)
+    return -1;
+  rof->position = 0;
+  rof->eof_seen = 0;
+  /* Try the static buffer first.  */
+  pagesize = 0;
+  rof->buffer = rof->stack_allocated_buffer;
+  size = sizeof (rof->stack_allocated_buffer);
+  rof->auxmap = NULL;
+  rof->auxmap_start = 0;
+  rof->auxmap_end = 0;
+  for (;;)
+    {
+      /* Attempt to read the contents in a single system call.  */
+      if (size > MIN_LEFTOVER)
+        {
+          int n = read (fd, rof->buffer, size);
+          if (n < 0 && errno == EINTR)
+            goto retry;
+# if defined __DragonFly__
+          if (!(n < 0 && errno == EFBIG))
+# endif
+            {
+              if (n <= 0)
+                /* Empty file.  */
+                goto fail1;
+              if (n + MIN_LEFTOVER <= size)
+                {
+                  /* The buffer was sufficiently large.  */
+                  rof->filled = n;
+# if defined __linux__ || defined __ANDROID__
+                  /* On Linux, the read() call may stop even if the buffer was
+                     large enough.  We need the equivalent of full_read().  */
+                  for (;;)
+                    {
+                      n = read (fd, rof->buffer + rof->filled, size - rof->filled);
+                      if (n < 0 && errno == EINTR)
+                        goto retry;
+                      if (n < 0)
+                        /* Some error.  */
+                        goto fail1;
+                      if (n + MIN_LEFTOVER > size - rof->filled)
+                        /* Allocate a larger buffer.  */
+                        break;
+                      if (n == 0)
+                        {
+                          /* Reached the end of file.  */
+                          close (fd);
+                          return 0;
+                        }
+                      rof->filled += n;
+                    }
+# else
+                  close (fd);
+                  return 0;
+# endif
+                }
+            }
+        }
+      /* Allocate a larger buffer.  */
+      if (pagesize == 0)
+        {
+          pagesize = getpagesize ();
+          size = pagesize;
+          while (size <= MIN_LEFTOVER)
+            size = 2 * size;
+        }
+      else
+        {
+          size = 2 * size;
+          if (size == 0)
+            /* Wraparound.  */
+            goto fail1;
+          if (rof->auxmap != NULL)
+            munmap (rof->auxmap, rof->auxmap_length);
+        }
+      rof->auxmap = (void *) mmap ((void *) 0, size, PROT_READ | PROT_WRITE,
+                                   MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+      if (rof->auxmap == (void *) -1)
+        {
+          close (fd);
+          return -1;
+        }
+      rof->auxmap_length = size;
+      rof->auxmap_start = (uintptr_t) rof->auxmap;
+      rof->auxmap_end = rof->auxmap_start + size;
+      rof->buffer = (char *) rof->auxmap;
+     retry:
+      /* Restart.  */
+      if (lseek (fd, 0, SEEK_SET) < 0)
+        {
+          close (fd);
+          fd = open (filename, O_RDONLY);
+          if (fd < 0)
+            goto fail2;
+        }
+    }
+ fail1:
+  close (fd);
+ fail2:
+  if (rof->auxmap != NULL)
+    munmap (rof->auxmap, rof->auxmap_length);
+  return -1;
+}
+
+/* Return the next byte from a read-only file stream without consuming it,
+   or -1 at EOF.  */
+static int
+rof_peekchar (struct rofile *rof)
+{
+  if (rof->position == rof->filled)
+    {
+      rof->eof_seen = 1;
+      return -1;
+    }
+  return (unsigned char) rof->buffer[rof->position];
+}
+
+/* Return the next byte from a read-only file stream, or -1 at EOF.  */
+static int
+rof_getchar (struct rofile *rof)
+{
+  int c = rof_peekchar (rof);
+  if (c >= 0)
+    rof->position++;
+  return c;
+}
+
+/* Parse an unsigned hexadecimal number from a read-only file stream.  */
+static int
+rof_scanf_lx (struct rofile *rof, uintptr_t *valuep)
+{
+  uintptr_t value = 0;
+  unsigned int numdigits = 0;
+  for (;;)
+    {
+      int c = rof_peekchar (rof);
+      if (c >= '0' && c <= '9')
+        value = (value << 4) + (c - '0');
+      else if (c >= 'A' && c <= 'F')
+        value = (value << 4) + (c - 'A' + 10);
+      else if (c >= 'a' && c <= 'f')
+        value = (value << 4) + (c - 'a' + 10);
+      else
+        break;
+      rof_getchar (rof);
+      numdigits++;
+    }
+  if (numdigits == 0)
+    return -1;
+  *valuep = value;
+  return 0;
+}
+
+/* Close a read-only file stream.  */
+static void
+rof_close (struct rofile *rof)
+{
+  if (rof->auxmap != NULL)
+    munmap (rof->auxmap, rof->auxmap_length);
+}
+
+#endif
+
+/* ========================== stackvma-vma-iter.c ========================== */
+/* Iterate through the virtual memory areas of the current process,
+   by reading from the /proc file system.  */
+
+/* This code is a simplified copy (no handling of protection flags) of the
+   code in gnulib's lib/vma-iter.c.  */
+
+#if defined __linux__ || defined __ANDROID__ \
+    || defined __FreeBSD_kernel__ || defined __FreeBSD__ || defined __DragonFly__ \
+    || defined __NetBSD__ \
+    || defined __CYGWIN__
+
+/* Forward declarations.  */
+struct callback_locals;
+static int callback (struct callback_locals *locals, uintptr_t start, uintptr_t end);
+
+# if defined __linux__ || defined __ANDROID__ || (defined __FreeBSD_kernel__ && !defined __FreeBSD__) || defined __CYGWIN__
+/* GNU/kFreeBSD mounts /proc as linprocfs, which looks like a Linux /proc
+   file system.  */
+
+static int
+vma_iterate_proc (struct callback_locals *locals)
+{
+  struct rofile rof;
+
+  /* Open the current process' maps file.  It describes one VMA per line.  */
+  if (rof_open (&rof, "/proc/self/maps") >= 0)
+    {
+      uintptr_t auxmap_start = rof.auxmap_start;
+      uintptr_t auxmap_end = rof.auxmap_end;
+
+      for (;;)
+        {
+          uintptr_t start, end;
+          int c;
+
+          /* Parse one line.  First start and end.  */
+          if (!(rof_scanf_lx (&rof, &start) >= 0
+                && rof_getchar (&rof) == '-'
+                && rof_scanf_lx (&rof, &end) >= 0))
+            break;
+          while (c = rof_getchar (&rof), c != -1 && c != '\n')
+            ;
+
+          if (start <= auxmap_start && auxmap_end - 1 <= end - 1)
+            {
+              /* Consider [start,end-1] \ [auxmap_start,auxmap_end-1]
+                 = [start,auxmap_start-1] u [auxmap_end,end-1].  */
+              if (start < auxmap_start)
+                if (callback (locals, start, auxmap_start))
+                  break;
+              if (auxmap_end - 1 < end - 1)
+                if (callback (locals, auxmap_end, end))
+                  break;
+            }
+          else
+            {
+              if (callback (locals, start, end))
+                break;
+            }
+        }
+      rof_close (&rof);
+      return 0;
+    }
+
+  return -1;
+}
+
+# elif defined __FreeBSD__ || defined __DragonFly__ || defined __NetBSD__
+
+static int
+vma_iterate_proc (struct callback_locals *locals)
+{
+  struct rofile rof;
+
+  /* Open the current process' maps file.  It describes one VMA per line.
+     On FreeBSD:
+       Cf. <https://www.freebsd.org/cgi/cvsweb.cgi/src/sys/fs/procfs/procfs_map.c?annotate=HEAD>
+     On NetBSD, there are two such files:
+       - /proc/curproc/map in near-FreeBSD syntax,
+       - /proc/curproc/maps in Linux syntax.
+       Cf. <http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/miscfs/procfs/procfs_map.c?rev=HEAD> */
+  if (rof_open (&rof, "/proc/curproc/map") >= 0)
+    {
+      uintptr_t auxmap_start = rof.auxmap_start;
+      uintptr_t auxmap_end = rof.auxmap_end;
+
+      for (;;)
+        {
+          uintptr_t start, end;
+          int c;
+
+          /* Parse one line.  First start.  */
+          if (!(rof_getchar (&rof) == '0'
+                && rof_getchar (&rof) == 'x'
+                && rof_scanf_lx (&rof, &start) >= 0))
+            break;
+          while (c = rof_peekchar (&rof), c == ' ' || c == '\t')
+            rof_getchar (&rof);
+          /* Then end.  */
+          if (!(rof_getchar (&rof) == '0'
+                && rof_getchar (&rof) == 'x'
+                && rof_scanf_lx (&rof, &end) >= 0))
+            break;
+          while (c = rof_getchar (&rof), c != -1 && c != '\n')
+            ;
+
+          if (start <= auxmap_start && auxmap_end - 1 <= end - 1)
+            {
+              /* Consider [start,end-1] \ [auxmap_start,auxmap_end-1]
+                 = [start,auxmap_start-1] u [auxmap_end,end-1].  */
+              if (start < auxmap_start)
+                if (callback (locals, start, auxmap_start))
+                  break;
+              if (auxmap_end - 1 < end - 1)
+                if (callback (locals, auxmap_end, end))
+                  break;
+            }
+          else
+            {
+              if (callback (locals, start, end))
+                break;
+            }
+        }
+      rof_close (&rof);
+      return 0;
+    }
+
+  return -1;
+}
+
+# endif
+
+# if (defined __FreeBSD_kernel__ || defined __FreeBSD__) && defined KERN_PROC_VMMAP /* FreeBSD >= 7.1 */
+
+#  include <sys/user.h> /* struct kinfo_vmentry */
+#  include <sys/sysctl.h> /* sysctl */
+
+static int
+vma_iterate_bsd (struct callback_locals *locals)
+{
+  /* Documentation: https://www.freebsd.org/cgi/man.cgi?sysctl(3)  */
+  int info_path[] = { CTL_KERN, KERN_PROC, KERN_PROC_VMMAP, getpid () };
+  size_t len;
+  size_t pagesize;
+  size_t memneed;
+  void *auxmap;
+  unsigned long auxmap_start;
+  unsigned long auxmap_end;
+  char *mem;
+  char *p;
+  char *p_end;
+
+  len = 0;
+  if (sysctl (info_path, 4, NULL, &len, NULL, 0) < 0)
+    return -1;
+  /* Allow for small variations over time.  In a multithreaded program
+     new VMAs can be allocated at any moment.  */
+  len = 2 * len + 200;
+  /* Allocate memneed bytes of memory.
+     We cannot use alloca here, because not much stack space is guaranteed.
+     We also cannot use malloc here, because a malloc() call may call mmap()
+     and thus pre-allocate available memory.
+     So use mmap(), and ignore the resulting VMA.  */
+  pagesize = getpagesize ();
+  memneed = len;
+  memneed = ((memneed - 1) / pagesize + 1) * pagesize;
+  auxmap = (void *) mmap ((void *) 0, memneed, PROT_READ | PROT_WRITE,
+                          MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+  if (auxmap == (void *) -1)
+    return -1;
+  auxmap_start = (unsigned long) auxmap;
+  auxmap_end = auxmap_start + memneed;
+  mem = (char *) auxmap;
+  if (sysctl (info_path, 4, mem, &len, NULL, 0) < 0)
+    {
+      munmap (auxmap, memneed);
+      return -1;
+    }
+  p = mem;
+  p_end = mem + len;
+  while (p < p_end)
+    {
+      struct kinfo_vmentry *kve = (struct kinfo_vmentry *) p;
+      unsigned long start = kve->kve_start;
+      unsigned long end = kve->kve_end;
+      if (start <= auxmap_start && auxmap_end - 1 <= end - 1)
+        {
+          /* Consider [start,end-1] \ [auxmap_start,auxmap_end-1]
+             = [start,auxmap_start-1] u [auxmap_end,end-1].  */
+          if (start < auxmap_start)
+            if (callback (locals, start, auxmap_start))
+              break;
+          if (auxmap_end - 1 < end - 1)
+            if (callback (locals, auxmap_end, end))
+              break;
+        }
+      else
+        {
+          if (callback (locals, start, end))
+            break;
+        }
+      p += kve->kve_structsize;
+    }
+  munmap (auxmap, memneed);
+  return 0;
+}
+
+# else
+
+#  define vma_iterate_bsd(locals) (-1)
+
+# endif
+
+
+/* Iterate over the virtual memory areas of the current process.
+   If such iteration is supported, the callback is called once for every
+   virtual memory area, in ascending order, with the following arguments:
+     - LOCALS is the same argument as passed to vma_iterate.
+     - START is the address of the first byte in the area, page-aligned.
+     - END is the address of the last byte in the area plus 1, page-aligned.
+       Note that it may be 0 for the last area in the address space.
+   If the callback returns 0, the iteration continues.  If it returns 1,
+   the iteration terminates prematurely.
+   This function may open file descriptors, but does not call malloc().
+   Return 0 if all went well, or -1 in case of error.  */
+static int
+vma_iterate (struct callback_locals *locals)
+{
+# if defined __FreeBSD__
+  /* On FreeBSD with procfs (but not GNU/kFreeBSD, which uses linprocfs), the
+     function vma_iterate_proc does not return the virtual memory areas that
+     were created by anonymous mmap.  See
+     <https://svnweb.freebsd.org/base/head/sys/fs/procfs/procfs_map.c?view=markup>
+     So use vma_iterate_proc only as a fallback.  */
+  int retval = vma_iterate_bsd (locals);
+  if (retval == 0)
+      return 0;
+
+  return vma_iterate_proc (locals);
+# else
+  /* On the other platforms, try the /proc approach first, and the sysctl()
+     as a fallback.  */
+  int retval = vma_iterate_proc (locals);
+  if (retval == 0)
+      return 0;
+
+  return vma_iterate_bsd (locals);
+# endif
+}
+
+#endif
+
+/* =========================== stackvma-mincore.c =========================== */
+
+/* mincore() is a system call that allows to inquire the status of a
+   range of pages of virtual memory.  In particular, it allows to inquire
+   whether a page is mapped at all (except on Mac OS X, where mincore
+   returns 0 even for unmapped addresses).
+   As of 2006, mincore() is supported by:        possible bits:
+     - Linux,   since Linux 2.4 and glibc 2.2,   1
+     - Solaris, since Solaris 9,                 1
+     - MacOS X, since MacOS X 10.3 (at least),   1
+     - FreeBSD, since FreeBSD 6.0,               MINCORE_{INCORE,REFERENCED,MODIFIED}
+     - NetBSD,  since NetBSD 3.0 (at least),     1
+     - OpenBSD, since OpenBSD 2.6 (at least),    1
+     - AIX,     since AIX 5.3,                   1
+   As of 2019, also on
+     - Hurd.
+   However, while the API allows to easily determine the bounds of mapped
+   virtual memory, it does not make it easy to find the bounds of _unmapped_
+   virtual memory ranges.  We try to work around this, but it may still be
+   slow.  */
+
+#if defined __linux__ || defined __ANDROID__ \
+    || defined __FreeBSD_kernel__ || defined __FreeBSD__ || defined __DragonFly__ \
+    || defined __NetBSD__ /* || defined __OpenBSD__ */ \
+    /* || (defined __APPLE__ && defined __MACH__) */ \
+    || defined _AIX || defined __sun
+
+# include <unistd.h> /* getpagesize, mincore */
+# include <sys/types.h>
+# include <sys/mman.h> /* mincore */
+
+/* The AIX declaration of mincore() uses 'caddr_t', whereas the other platforms
+   use 'void *'. */
+# ifdef _AIX
+typedef caddr_t MINCORE_ADDR_T;
+# else
+typedef void* MINCORE_ADDR_T;
+# endif
+
+/* The glibc and musl declaration of mincore() uses 'unsigned char *', whereas
+   the BSD declaration uses 'char *'.  */
+# if __GLIBC__ >= 2 || defined __linux__ || defined __ANDROID__
+typedef unsigned char pageinfo_t;
+# else
+typedef char pageinfo_t;
+# endif
+
+/* Cache for getpagesize().  */
+static uintptr_t pagesize;
+
+/* Initialize pagesize.  */
+static void
+init_pagesize (void)
+{
+  pagesize = getpagesize ();
+}
+
+/* Test whether the page starting at ADDR is among the address range.
+   ADDR must be a multiple of pagesize.  */
+static int
+is_mapped (uintptr_t addr)
+{
+  pageinfo_t vec[1];
+  return mincore ((MINCORE_ADDR_T) addr, pagesize, vec) >= 0;
+}
+
+/* Assuming that the page starting at ADDR is among the address range,
+   return the start of its virtual memory range.
+   ADDR must be a multiple of pagesize.  */
+static uintptr_t
+mapped_range_start (uintptr_t addr)
+{
+  /* Use a moderately sized VEC here, small enough that it fits on the stack
+     (without requiring malloc).  */
+  pageinfo_t vec[1024];
+  uintptr_t stepsize = sizeof (vec);
+
+  for (;;)
+    {
+      uintptr_t max_remaining;
+
+      if (addr == 0)
+        return addr;
+
+      max_remaining = addr / pagesize;
+      if (stepsize > max_remaining)
+        stepsize = max_remaining;
+      if (mincore ((MINCORE_ADDR_T) (addr - stepsize * pagesize),
+                   stepsize * pagesize, vec) < 0)
+        /* Time to search in smaller steps.  */
+        break;
+      /* The entire range exists.  Continue searching in large steps.  */
+      addr -= stepsize * pagesize;
+    }
+  for (;;)
+    {
+      uintptr_t halfstepsize1;
+      uintptr_t halfstepsize2;
+
+      if (stepsize == 1)
+        return addr;
+
+      /* Here we know that less than stepsize pages exist starting at addr.  */
+      halfstepsize1 = (stepsize + 1) / 2;
+      halfstepsize2 = stepsize / 2;
+      /* halfstepsize1 + halfstepsize2 = stepsize.  */
+
+      if (mincore ((MINCORE_ADDR_T) (addr - halfstepsize1 * pagesize),
+                   halfstepsize1 * pagesize, vec) < 0)
+        stepsize = halfstepsize1;
+      else
+        {
+          addr -= halfstepsize1 * pagesize;
+          stepsize = halfstepsize2;
+        }
+    }
+}
+
+/* Assuming that the page starting at ADDR is among the address range,
+   return the end of its virtual memory range + 1.
+   ADDR must be a multiple of pagesize.  */
+static uintptr_t
+mapped_range_end (uintptr_t addr)
+{
+  /* Use a moderately sized VEC here, small enough that it fits on the stack
+     (without requiring malloc).  */
+  pageinfo_t vec[1024];
+  uintptr_t stepsize = sizeof (vec);
+
+  addr += pagesize;
+  for (;;)
+    {
+      uintptr_t max_remaining;
+
+      if (addr == 0) /* wrapped around? */
+        return addr;
+
+      max_remaining = (- addr) / pagesize;
+      if (stepsize > max_remaining)
+        stepsize = max_remaining;
+      if (mincore ((MINCORE_ADDR_T) addr, stepsize * pagesize, vec) < 0)
+        /* Time to search in smaller steps.  */
+        break;
+      /* The entire range exists.  Continue searching in large steps.  */
+      addr += stepsize * pagesize;
+    }
+  for (;;)
+    {
+      uintptr_t halfstepsize1;
+      uintptr_t halfstepsize2;
+
+      if (stepsize == 1)
+        return addr;
+
+      /* Here we know that less than stepsize pages exist starting at addr.  */
+      halfstepsize1 = (stepsize + 1) / 2;
+      halfstepsize2 = stepsize / 2;
+      /* halfstepsize1 + halfstepsize2 = stepsize.  */
+
+      if (mincore ((MINCORE_ADDR_T) addr, halfstepsize1 * pagesize, vec) < 0)
+        stepsize = halfstepsize1;
+      else
+        {
+          addr += halfstepsize1 * pagesize;
+          stepsize = halfstepsize2;
+        }
+    }
+}
+
+/* Determine whether an address range [ADDR1..ADDR2] is completely unmapped.
+   ADDR1 must be <= ADDR2.  */
+static int
+is_unmapped (uintptr_t addr1, uintptr_t addr2)
+{
+  uintptr_t count;
+  uintptr_t stepsize;
+
+  /* Round addr1 down.  */
+  addr1 = (addr1 / pagesize) * pagesize;
+  /* Round addr2 up and turn it into an exclusive bound.  */
+  addr2 = ((addr2 / pagesize) + 1) * pagesize;
+
+  /* This is slow: mincore() does not provide a way to determine the bounds
+     of the gaps directly.  So we have to use mincore() on individual pages
+     over and over again.  Only after we've verified that all pages are
+     unmapped, we know that the range is completely unmapped.
+     If we were to traverse the pages from bottom to top or from top to bottom,
+     it would be slow even in the average case.  To speed up the search, we
+     exploit the fact that mapped memory ranges are larger than one page on
+     average, therefore we have good chances of hitting a mapped area if we
+     traverse only every second, or only fourth page, etc.  This doesn't
+     decrease the worst-case runtime, only the average runtime.  */
+  count = (addr2 - addr1) / pagesize;
+  /* We have to test is_mapped (addr1 + i * pagesize) for 0 <= i < count.  */
+  for (stepsize = 1; stepsize < count; )
+    stepsize = 2 * stepsize;
+  for (;;)
+    {
+      uintptr_t addr_stepsize;
+      uintptr_t i;
+      uintptr_t addr;
+
+      stepsize = stepsize / 2;
+      if (stepsize == 0)
+        break;
+      addr_stepsize = stepsize * pagesize;
+      for (i = stepsize, addr = addr1 + addr_stepsize;
+           i < count;
+           i += 2 * stepsize, addr += 2 * addr_stepsize)
+        /* Here addr = addr1 + i * pagesize.  */
+        if (is_mapped (addr))
+          return 0;
+    }
+  return 1;
+}
+
+# if STACK_DIRECTION < 0
+
+/* Info about the gap between this VMA and the previous one.
+   addr must be < vma->start.  */
+static int
+mincore_is_near_this (uintptr_t addr, struct vma_struct *vma)
+{
+  /*   vma->start - addr <= (vma->start - vma->prev_end) / 2
+     is mathematically equivalent to
+       vma->prev_end <= 2 * addr - vma->start
+     <==> is_unmapped (2 * addr - vma->start, vma->start - 1).
+     But be careful about overflow: if 2 * addr - vma->start is negative,
+     we consider a tiny "guard page" mapping [0, 0] to be present around
+     NULL; it intersects the range (2 * addr - vma->start, vma->start - 1),
+     therefore return false.  */
+  uintptr_t testaddr = addr - (vma->start - addr);
+  if (testaddr > addr) /* overflow? */
+    return 0;
+  /* Here testaddr <= addr < vma->start.  */
+  return is_unmapped (testaddr, vma->start - 1);
+}
+
+# endif
+# if STACK_DIRECTION > 0
+
+/* Info about the gap between this VMA and the next one.
+   addr must be > vma->end - 1.  */
+static int
+mincore_is_near_this (uintptr_t addr, struct vma_struct *vma)
+{
+  /*   addr - vma->end < (vma->next_start - vma->end) / 2
+     is mathematically equivalent to
+       vma->next_start > 2 * addr - vma->end
+     <==> is_unmapped (vma->end, 2 * addr - vma->end).
+     But be careful about overflow: if 2 * addr - vma->end is > ~0UL,
+     we consider a tiny "guard page" mapping [0, 0] to be present around
+     NULL; it intersects the range (vma->end, 2 * addr - vma->end),
+     therefore return false.  */
+  uintptr_t testaddr = addr + (addr - vma->end);
+  if (testaddr < addr) /* overflow? */
+    return 0;
+  /* Here vma->end - 1 < addr <= testaddr.  */
+  return is_unmapped (vma->end, testaddr);
+}
+
+# endif
+
+static int
+mincore_get_vma (uintptr_t address, struct vma_struct *vma)
+{
+  if (pagesize == 0)
+    init_pagesize ();
+  address = (address / pagesize) * pagesize;
+  vma->start = mapped_range_start (address);
+  vma->end = mapped_range_end (address);
+  vma->is_near_this = mincore_is_near_this;
+  return 0;
+}
+
+#endif
+
+/* ========================================================================== */
+
+/* ---------------------------- stackvma-linux.c ---------------------------- */
+
+#if defined __linux__ || defined __ANDROID__ /* Linux */
+
+struct callback_locals
+{
+  uintptr_t address;
+  struct vma_struct *vma;
+# if STACK_DIRECTION < 0
+  uintptr_t prev;
+# else
+  int stop_at_next_vma;
+# endif
+  int retval;
+};
+
+static int
+callback (struct callback_locals *locals, uintptr_t start, uintptr_t end)
+{
+# if STACK_DIRECTION < 0
+  if (locals->address >= start && locals->address <= end - 1)
+    {
+      locals->vma->start = start;
+      locals->vma->end = end;
+      locals->vma->prev_end = locals->prev;
+      locals->retval = 0;
+      return 1;
+    }
+  locals->prev = end;
+# else
+  if (locals->stop_at_next_vma)
+    {
+      locals->vma->next_start = start;
+      locals->stop_at_next_vma = 0;
+      return 1;
+    }
+  if (locals->address >= start && locals->address <= end - 1)
+    {
+      locals->vma->start = start;
+      locals->vma->end = end;
+      locals->retval = 0;
+      locals->stop_at_next_vma = 1;
+      return 0;
+    }
+# endif
+  return 0;
+}
+
+int
+sigsegv_get_vma (uintptr_t address, struct vma_struct *vma)
+{
+  struct callback_locals locals;
+  locals.address = address;
+  locals.vma = vma;
+# if STACK_DIRECTION < 0
+  locals.prev = 0;
+# else
+  locals.stop_at_next_vma = 0;
+# endif
+  locals.retval = -1;
+
+  vma_iterate (&locals);
+  if (locals.retval == 0)
+    {
+# if !(STACK_DIRECTION < 0)
+      if (locals.stop_at_next_vma)
+        vma->next_start = 0;
+# endif
+      vma->is_near_this = simple_is_near_this;
+      return 0;
+    }
+
+  return mincore_get_vma (address, vma);
+}
+
+/* --------------------------- stackvma-freebsd.c --------------------------- */
+
+#elif defined __FreeBSD_kernel__ || defined __FreeBSD__ || defined __DragonFly__ /* GNU/kFreeBSD, FreeBSD */
+
+struct callback_locals
+{
+  uintptr_t address;
+  struct vma_struct *vma;
+  /* The stack appears as multiple adjacents segments, therefore we
+     merge adjacent segments.  */
+  uintptr_t curr_start, curr_end;
+# if STACK_DIRECTION < 0
+  uintptr_t prev_end;
+# else
+  int stop_at_next_vma;
+# endif
+  int retval;
+};
+
+static int
+callback (struct callback_locals *locals, uintptr_t start, uintptr_t end)
+{
+  if (start == locals->curr_end)
+    {
+      /* Merge adjacent segments.  */
+      locals->curr_end = end;
+      return 0;
+    }
+# if STACK_DIRECTION < 0
+  if (locals->curr_start < locals->curr_end
+      && locals->address >= locals->curr_start
+      && locals->address <= locals->curr_end - 1)
+    {
+      locals->vma->start = locals->curr_start;
+      locals->vma->end = locals->curr_end;
+      locals->vma->prev_end = locals->prev_end;
+      locals->retval = 0;
+      return 1;
+    }
+  locals->prev_end = locals->curr_end;
+# else
+  if (locals->stop_at_next_vma)
+    {
+      locals->vma->next_start = locals->curr_start;
+      locals->stop_at_next_vma = 0;
+      return 1;
+    }
+  if (locals->curr_start < locals->curr_end
+      && locals->address >= locals->curr_start
+      && locals->address <= locals->curr_end - 1)
+    {
+      locals->vma->start = locals->curr_start;
+      locals->vma->end = locals->curr_end;
+      locals->retval = 0;
+      locals->stop_at_next_vma = 1;
+      return 0;
+    }
+# endif
+  locals->curr_start = start; locals->curr_end = end;
+  return 0;
+}
+
+int
+sigsegv_get_vma (uintptr_t address, struct vma_struct *vma)
+{
+  struct callback_locals locals;
+  locals.address = address;
+  locals.vma = vma;
+  locals.curr_start = 0;
+  locals.curr_end = 0;
+# if STACK_DIRECTION < 0
+  locals.prev_end = 0;
+# else
+  locals.stop_at_next_vma = 0;
+# endif
+  locals.retval = -1;
+
+  vma_iterate (&locals);
+  if (locals.retval < 0)
+    {
+      if (locals.curr_start < locals.curr_end
+          && address >= locals.curr_start && address <= locals.curr_end - 1)
+        {
+          vma->start = locals.curr_start;
+          vma->end = locals.curr_end;
+# if STACK_DIRECTION < 0
+          vma->prev_end = locals.prev_end;
+# else
+          vma->next_start = 0;
+# endif
+          locals.retval = 0;
+        }
+    }
+  if (locals.retval == 0)
+    {
+# if !(STACK_DIRECTION < 0)
+      if (locals.stop_at_next_vma)
+        vma->next_start = 0;
+# endif
+      vma->is_near_this = simple_is_near_this;
+      return 0;
+    }
+
+  /* FreeBSD 6.[01] doesn't allow to distinguish unmapped pages from
+     mapped but swapped-out pages.  See whether it's fixed.  */
+  if (!is_mapped (0))
+    /* OK, mincore() appears to work as expected.  */
+    return mincore_get_vma (address, vma);
+  return -1;
+}
+
+/* --------------------------- stackvma-netbsd.c --------------------------- */
+
+#elif defined __NetBSD__ /* NetBSD */
+
+struct callback_locals
+{
+  uintptr_t address;
+  struct vma_struct *vma;
+  /* The stack appears as multiple adjacents segments, therefore we
+     merge adjacent segments.  */
+  uintptr_t curr_start, curr_end;
+# if STACK_DIRECTION < 0
+  uintptr_t prev_end;
+# else
+  int stop_at_next_vma;
+# endif
+  int retval;
+};
+
+static int
+callback (struct callback_locals *locals, uintptr_t start, uintptr_t end)
+{
+  if (start == locals->curr_end)
+    {
+      /* Merge adjacent segments.  */
+      locals->curr_end = end;
+      return 0;
+    }
+# if STACK_DIRECTION < 0
+  if (locals->curr_start < locals->curr_end
+      && locals->address >= locals->curr_start
+      && locals->address <= locals->curr_end - 1)
+    {
+      locals->vma->start = locals->curr_start;
+      locals->vma->end = locals->curr_end;
+      locals->vma->prev_end = locals->prev_end;
+      locals->retval = 0;
+      return 1;
+    }
+  locals->prev_end = locals->curr_end;
+# else
+  if (locals->stop_at_next_vma)
+    {
+      locals->vma->next_start = locals->curr_start;
+      locals->stop_at_next_vma = 0;
+      return 1;
+    }
+  if (locals->curr_start < locals->curr_end
+      && locals->address >= locals->curr_start
+      && locals->address <= locals->curr_end - 1)
+    {
+      locals->vma->start = locals->curr_start;
+      locals->vma->end = locals->curr_end;
+      locals->retval = 0;
+      locals->stop_at_next_vma = 1;
+      return 0;
+    }
+# endif
+  locals->curr_start = start; locals->curr_end = end;
+  return 0;
+}
+
+int
+sigsegv_get_vma (uintptr_t address, struct vma_struct *vma)
+{
+  struct callback_locals locals;
+  locals.address = address;
+  locals.vma = vma;
+  locals.curr_start = 0;
+  locals.curr_end = 0;
+# if STACK_DIRECTION < 0
+  locals.prev_end = 0;
+# else
+  locals.stop_at_next_vma = 0;
+# endif
+  locals.retval = -1;
+
+  vma_iterate (&locals);
+  if (locals.retval < 0)
+    {
+      if (locals.curr_start < locals.curr_end
+          && address >= locals.curr_start && address <= locals.curr_end - 1)
+        {
+          vma->start = locals.curr_start;
+          vma->end = locals.curr_end;
+# if STACK_DIRECTION < 0
+          vma->prev_end = locals.prev_end;
+# else
+          vma->next_start = 0;
+# endif
+          locals.retval = 0;
+        }
+    }
+  if (locals.retval == 0)
+    {
+# if !(STACK_DIRECTION < 0)
+      if (locals.stop_at_next_vma)
+        vma->next_start = 0;
+# endif
+      vma->is_near_this = simple_is_near_this;
+      return 0;
+    }
+
+  return mincore_get_vma (address, vma);
+}
+
+/* --------------------------- stackvma-mquery.c --------------------------- */
+
+/* mquery() is a system call that allows to inquire the status of a
+   range of pages of virtual memory.  In particular, it allows to inquire
+   whether a page is mapped at all, and where is the next unmapped page
+   after a given address.
+   As of 2021, mquery() is supported by:
+     - OpenBSD, since OpenBSD 3.4.
+   Note that this file can give different results.  For example, on
+   OpenBSD 4.4 / i386 the stack segment (which starts around 0xcdbfe000)
+   ends at 0xcfbfdfff according to mincore, but at 0xffffffff according to
+   mquery.  */
+
+#elif defined __OpenBSD__ /* OpenBSD */
+
+# include <unistd.h> /* getpagesize, mincore */
+# include <sys/types.h>
+# include <sys/mman.h> /* mincore */
+
+/* Cache for getpagesize().  */
+static uintptr_t pagesize;
+
+/* Initialize pagesize.  */
+static void
+init_pagesize (void)
+{
+  pagesize = getpagesize ();
+}
+
+/* Test whether the page starting at ADDR is among the address range.
+   ADDR must be a multiple of pagesize.  */
+static int
+is_mapped (uintptr_t addr)
+{
+  /* Avoid calling mquery with a NULL first argument, because this argument
+     value has a specific meaning.  We know the NULL page is unmapped.  */
+  if (addr == 0)
+    return 0;
+  return mquery ((void *) addr, pagesize, 0, MAP_FIXED, -1, 0) == (void *) -1;
+}
+
+/* Assuming that the page starting at ADDR is among the address range,
+   return the start of its virtual memory range.
+   ADDR must be a multiple of pagesize.  */
+static uintptr_t
+mapped_range_start (uintptr_t addr)
+{
+  uintptr_t stepsize;
+  uintptr_t known_unmapped_page;
+
+  /* Look at smaller addresses, in larger and larger steps, to minimize the
+     number of mquery() calls.  */
+  stepsize = pagesize;
+  for (;;)
+    {
+      uintptr_t hole;
+
+      if (addr == 0)
+        abort ();
+
+      if (addr <= stepsize)
+        {
+          known_unmapped_page = 0;
+          break;
+        }
+
+      hole = (uintptr_t) mquery ((void *) (addr - stepsize), pagesize,
+                                     0, 0, -1, 0);
+      if (!(hole == (uintptr_t) (void *) -1 || hole >= addr))
+        {
+          /* Some part of [addr - stepsize, addr - 1] is unmapped.  */
+          known_unmapped_page = hole;
+          break;
+        }
+
+      /* The entire range [addr - stepsize, addr - 1] is mapped.  */
+      addr -= stepsize;
+
+      if (2 * stepsize > stepsize && 2 * stepsize < addr)
+        stepsize = 2 * stepsize;
+    }
+
+  /* Now reduce the step size again.
+     We know that the page at known_unmapped_page is unmapped and that
+     0 < addr - known_unmapped_page <= stepsize.  */
+  while (stepsize > pagesize && stepsize / 2 >= addr - known_unmapped_page)
+    stepsize = stepsize / 2;
+  /* Still 0 < addr - known_unmapped_page <= stepsize.  */
+  while (stepsize > pagesize)
+    {
+      uintptr_t hole;
+
+      stepsize = stepsize / 2;
+      hole = (uintptr_t) mquery ((void *) (addr - stepsize), pagesize,
+                                     0, 0, -1, 0);
+      if (!(hole == (uintptr_t) (void *) -1 || hole >= addr))
+        /* Some part of [addr - stepsize, addr - 1] is unmapped.  */
+        known_unmapped_page = hole;
+      else
+        /* The entire range [addr - stepsize, addr - 1] is mapped.  */
+        addr -= stepsize;
+      /* Still 0 < addr - known_unmapped_page <= stepsize.  */
+    }
+
+  return addr;
+}
+
+/* Assuming that the page starting at ADDR is among the address range,
+   return the end of its virtual memory range + 1.
+   ADDR must be a multiple of pagesize.  */
+static uintptr_t
+mapped_range_end (uintptr_t addr)
+{
+  uintptr_t end;
+
+  if (addr == 0)
+    abort ();
+
+  end = (uintptr_t) mquery ((void *) addr, pagesize, 0, 0, -1, 0);
+  if (end == (uintptr_t) (void *) -1)
+    end = 0; /* wrap around */
+  return end;
+}
+
+/* Determine whether an address range [ADDR1..ADDR2] is completely unmapped.
+   ADDR1 must be <= ADDR2.  */
+static int
+is_unmapped (uintptr_t addr1, uintptr_t addr2)
+{
+  /* Round addr1 down.  */
+  addr1 = (addr1 / pagesize) * pagesize;
+  /* Round addr2 up and turn it into an exclusive bound.  */
+  addr2 = ((addr2 / pagesize) + 1) * pagesize;
+
+  /* Avoid calling mquery with a NULL first argument, because this argument
+     value has a specific meaning.  We know the NULL page is unmapped.  */
+  if (addr1 == 0)
+    addr1 = pagesize;
+
+  if (addr1 < addr2)
+    {
+      if (mquery ((void *) addr1, addr2 - addr1, 0, MAP_FIXED, -1, 0)
+          == (void *) -1)
+        /* Not all the interval [addr1 .. addr2 - 1] is unmapped.  */
+        return 0;
+      else
+        /* The interval [addr1 .. addr2 - 1] is unmapped.  */
+        return 1;
+    }
+  return 1;
+}
+
+# if STACK_DIRECTION < 0
+
+/* Info about the gap between this VMA and the previous one.
+   addr must be < vma->start.  */
+static int
+mquery_is_near_this (uintptr_t addr, struct vma_struct *vma)
+{
+  /*   vma->start - addr <= (vma->start - vma->prev_end) / 2
+     is mathematically equivalent to
+       vma->prev_end <= 2 * addr - vma->start
+     <==> is_unmapped (2 * addr - vma->start, vma->start - 1).
+     But be careful about overflow: if 2 * addr - vma->start is negative,
+     we consider a tiny "guard page" mapping [0, 0] to be present around
+     NULL; it intersects the range (2 * addr - vma->start, vma->start - 1),
+     therefore return false.  */
+  uintptr_t testaddr = addr - (vma->start - addr);
+  if (testaddr > addr) /* overflow? */
+    return 0;
+  /* Here testaddr <= addr < vma->start.  */
+  return is_unmapped (testaddr, vma->start - 1);
+}
+
+# endif
+# if STACK_DIRECTION > 0
+
+/* Info about the gap between this VMA and the next one.
+   addr must be > vma->end - 1.  */
+static int
+mquery_is_near_this (uintptr_t addr, struct vma_struct *vma)
+{
+  /*   addr - vma->end < (vma->next_start - vma->end) / 2
+     is mathematically equivalent to
+       vma->next_start > 2 * addr - vma->end
+     <==> is_unmapped (vma->end, 2 * addr - vma->end).
+     But be careful about overflow: if 2 * addr - vma->end is > ~0UL,
+     we consider a tiny "guard page" mapping [0, 0] to be present around
+     NULL; it intersects the range (vma->end, 2 * addr - vma->end),
+     therefore return false.  */
+  uintptr_t testaddr = addr + (addr - vma->end);
+  if (testaddr < addr) /* overflow? */
+    return 0;
+  /* Here vma->end - 1 < addr <= testaddr.  */
+  return is_unmapped (vma->end, testaddr);
+}
+
+# endif
+
+int
+sigsegv_get_vma (uintptr_t address, struct vma_struct *vma)
+{
+  if (pagesize == 0)
+    init_pagesize ();
+  address = (address / pagesize) * pagesize;
+  vma->start = mapped_range_start (address);
+  vma->end = mapped_range_end (address);
+  vma->is_near_this = mquery_is_near_this;
+  return 0;
+}
+
+/* ---------------------------- stackvma-mach.c ---------------------------- */
+
+#elif (defined __APPLE__ && defined __MACH__) /* macOS */
+
+#include <libc.h>
+#include <nlist.h>
+#include <mach/mach.h>
+#include <mach/machine/vm_param.h>
+
+int
+sigsegv_get_vma (uintptr_t req_address, struct vma_struct *vma)
+{
+  uintptr_t prev_address = 0, prev_size = 0;
+  uintptr_t join_address = 0, join_size = 0;
+  int more = 1;
+  vm_address_t address;
+  vm_size_t size;
+  task_t task = mach_task_self ();
+
+  for (address = VM_MIN_ADDRESS; more; address += size)
+    {
+      mach_port_t object_name;
+      /* In MacOS X 10.5, the types vm_address_t, vm_offset_t, vm_size_t have
+         32 bits in 32-bit processes and 64 bits in 64-bit processes. Whereas
+         mach_vm_address_t and mach_vm_size_t are always 64 bits large.
+         MacOS X 10.5 has three vm_region like methods:
+           - vm_region. It has arguments that depend on whether the current
+             process is 32-bit or 64-bit. When linking dynamically, this
+             function exists only in 32-bit processes. Therefore we use it only
+             in 32-bit processes.
+           - vm_region_64. It has arguments that depend on whether the current
+             process is 32-bit or 64-bit. It interprets a flavor
+             VM_REGION_BASIC_INFO as VM_REGION_BASIC_INFO_64, which is
+             dangerous since 'struct vm_region_basic_info_64' is larger than
+             'struct vm_region_basic_info'; therefore let's write
+             VM_REGION_BASIC_INFO_64 explicitly.
+           - mach_vm_region. It has arguments that are 64-bit always. This
+             function is useful when you want to access the VM of a process
+             other than the current process.
+         In 64-bit processes, we could use vm_region_64 or mach_vm_region.
+         I choose vm_region_64 because it uses the same types as vm_region,
+         resulting in less conditional code.  */
+# if defined __aarch64__ || defined __ppc64__ || defined __x86_64__
+      struct vm_region_basic_info_64 info;
+      mach_msg_type_number_t info_count = VM_REGION_BASIC_INFO_COUNT_64;
+
+      more = (vm_region_64 (task, &address, &size, VM_REGION_BASIC_INFO_64,
+                            (vm_region_info_t)&info, &info_count, &object_name)
+              == KERN_SUCCESS);
+# else
+      struct vm_region_basic_info info;
+      mach_msg_type_number_t info_count = VM_REGION_BASIC_INFO_COUNT;
+
+      more = (vm_region (task, &address, &size, VM_REGION_BASIC_INFO,
+                         (vm_region_info_t)&info, &info_count, &object_name)
+              == KERN_SUCCESS);
+# endif
+      if (!more)
+        {
+          address = join_address + join_size;
+          size = 0;
+        }
+
+      if ((uintptr_t) address == join_address + join_size)
+        join_size += size;
+      else
+        {
+          prev_address = join_address;
+          prev_size = join_size;
+          join_address = (uintptr_t) address;
+          join_size = size;
+        }
+
+      if (object_name != MACH_PORT_NULL)
+        mach_port_deallocate (mach_task_self (), object_name);
+
+# if STACK_DIRECTION < 0
+      if (join_address <= req_address && join_address + join_size > req_address)
+        {
+          vma->start = join_address;
+          vma->end = join_address + join_size;
+          vma->prev_end = prev_address + prev_size;
+          vma->is_near_this = simple_is_near_this;
+          return 0;
+        }
+# else
+      if (prev_address <= req_address && prev_address + prev_size > req_address)
+        {
+          vma->start = prev_address;
+          vma->end = prev_address + prev_size;
+          vma->next_start = join_address;
+          vma->is_near_this = simple_is_near_this;
+          return 0;
+        }
+# endif
+    }
+
+# if STACK_DIRECTION > 0
+  if (join_address <= req_address && join_address + size > req_address)
+    {
+      vma->start = prev_address;
+      vma->end = prev_address + prev_size;
+      vma->next_start = ~0UL;
+      vma->is_near_this = simple_is_near_this;
+      return 0;
+    }
+# endif
+
+  return -1;
+}
+
+/* -------------------------------------------------------------------------- */
+
+#elif defined _AIX /* AIX */
+
+int
+sigsegv_get_vma (uintptr_t address, struct vma_struct *vma)
+{
+  return mincore_get_vma (address, vma);
+}
+
+/* --------------------------- stackvma-procfs.h --------------------------- */
+
+#elif defined __sgi || defined __sun /* IRIX, Solaris */
+
+# include <errno.h> /* errno, EINTR */
+# include <fcntl.h> /* open, O_RDONLY */
+# include <stddef.h> /* size_t */
+# include <unistd.h> /* getpagesize, getpid, read, close */
+# include <sys/types.h>
+# include <sys/mman.h> /* mmap, munmap */
+# include <sys/stat.h> /* fstat */
+# include <string.h> /* memcpy */
+
+/* Try to use the newer ("structured") /proc filesystem API, if supported.  */
+# define _STRUCTURED_PROC 1
+# include <sys/procfs.h> /* prmap_t, optionally PIOC* */
+
+# if !defined __sun
+
+/* Cache for getpagesize().  */
+static uintptr_t pagesize;
+
+/* Initialize pagesize.  */
+static void
+init_pagesize (void)
+{
+  pagesize = getpagesize ();
+}
+
+# endif
+
+struct callback_locals
+{
+  uintptr_t address;
+  struct vma_struct *vma;
+# if STACK_DIRECTION < 0
+  uintptr_t prev;
+# else
+  int stop_at_next_vma;
+# endif
+  int retval;
+};
+
+static int
+callback (struct callback_locals *locals, uintptr_t start, uintptr_t end)
+{
+# if STACK_DIRECTION < 0
+  if (locals->address >= start && locals->address <= end - 1)
+    {
+      locals->vma->start = start;
+      locals->vma->end = end;
+      locals->vma->prev_end = locals->prev;
+      locals->retval = 0;
+      return 1;
+    }
+  locals->prev = end;
+# else
+  if (locals->stop_at_next_vma)
+    {
+      locals->vma->next_start = start;
+      locals->stop_at_next_vma = 0;
+      return 1;
+    }
+  if (locals->address >= start && locals->address <= end - 1)
+    {
+      locals->vma->start = start;
+      locals->vma->end = end;
+      locals->retval = 0;
+      locals->stop_at_next_vma = 1;
+      return 0;
+    }
+# endif
+  return 0;
+}
+
+/* Iterate over the virtual memory areas of the current process.
+   If such iteration is supported, the callback is called once for every
+   virtual memory area, in ascending order, with the following arguments:
+     - LOCALS is the same argument as passed to vma_iterate.
+     - START is the address of the first byte in the area, page-aligned.
+     - END is the address of the last byte in the area plus 1, page-aligned.
+       Note that it may be 0 for the last area in the address space.
+   If the callback returns 0, the iteration continues.  If it returns 1,
+   the iteration terminates prematurely.
+   This function may open file descriptors, but does not call malloc().
+   Return 0 if all went well, or -1 in case of error.  */
+/* This code is a simplified copy (no handling of protection flags) of the
+   code in gnulib's lib/vma-iter.c.  */
+static int
+vma_iterate (struct callback_locals *locals)
+{
+  /* Note: Solaris <sys/procfs.h> defines a different type prmap_t with
+     _STRUCTURED_PROC than without! Here's a table of sizeof(prmap_t):
+                                  32-bit   64-bit
+         _STRUCTURED_PROC = 0       32       56
+         _STRUCTURED_PROC = 1       96      104
+     Therefore, if the include files provide the newer API, prmap_t has
+     the bigger size, and thus you MUST use the newer API.  And if the
+     include files provide the older API, prmap_t has the smaller size,
+     and thus you MUST use the older API.  */
+
+# if defined PIOCNMAP && defined PIOCMAP
+  /* We must use the older /proc interface.  */
+
+  char fnamebuf[6+10+1];
+  char *fname;
+  int fd;
+  int nmaps;
+  size_t memneed;
+#  if HAVE_MAP_ANONYMOUS
+#   define zero_fd -1
+#   define map_flags MAP_ANONYMOUS
+#  else /* !HAVE_MAP_ANONYMOUS */
+  int zero_fd;
+#   define map_flags 0
+#  endif
+  void *auxmap;
+  uintptr_t auxmap_start;
+  uintptr_t auxmap_end;
+  prmap_t* maps;
+  prmap_t* mp;
+
+  if (pagesize == 0)
+    init_pagesize ();
+
+  /* Construct fname = sprintf (fnamebuf+i, "/proc/%u", getpid ()).  */
+  fname = fnamebuf + sizeof (fnamebuf) - 1;
+  *fname = '\0';
+  {
+    unsigned int value = getpid ();
+    do
+      *--fname = (value % 10) + '0';
+    while ((value = value / 10) > 0);
+  }
+  fname -= 6;
+  memcpy (fname, "/proc/", 6);
+
+  fd = open (fname, O_RDONLY);
+  if (fd < 0)
+    return -1;
+
+  if (ioctl (fd, PIOCNMAP, &nmaps) < 0)
+    goto fail2;
+
+  memneed = (nmaps + 10) * sizeof (prmap_t);
+  /* Allocate memneed bytes of memory.
+     We cannot use alloca here, because not much stack space is guaranteed.
+     We also cannot use malloc here, because a malloc() call may call mmap()
+     and thus pre-allocate available memory.
+     So use mmap(), and ignore the resulting VMA.  */
+  memneed = ((memneed - 1) / pagesize + 1) * pagesize;
+#  if !HAVE_MAP_ANONYMOUS
+  zero_fd = open ("/dev/zero", O_RDONLY, 0644);
+  if (zero_fd < 0)
+    goto fail2;
+#  endif
+  auxmap = (void *) mmap ((void *) 0, memneed, PROT_READ | PROT_WRITE,
+                          map_flags | MAP_PRIVATE, zero_fd, 0);
+#  if !HAVE_MAP_ANONYMOUS
+  close (zero_fd);
+#  endif
+  if (auxmap == (void *) -1)
+    goto fail2;
+  auxmap_start = (uintptr_t) auxmap;
+  auxmap_end = auxmap_start + memneed;
+  maps = (prmap_t *) auxmap;
+
+  if (ioctl (fd, PIOCMAP, maps) < 0)
+    goto fail1;
+
+  for (mp = maps;;)
+    {
+      uintptr_t start, end;
+
+      start = (uintptr_t) mp->pr_vaddr;
+      end = start + mp->pr_size;
+      if (start == 0 && end == 0)
+        break;
+      mp++;
+      if (start <= auxmap_start && auxmap_end - 1 <= end - 1)
+        {
+          /* Consider [start,end-1] \ [auxmap_start,auxmap_end-1]
+             = [start,auxmap_start-1] u [auxmap_end,end-1].  */
+          if (start < auxmap_start)
+            if (callback (locals, start, auxmap_start))
+              break;
+          if (auxmap_end - 1 < end - 1)
+            if (callback (locals, auxmap_end, end))
+              break;
+        }
+      else
+        {
+          if (callback (locals, start, end))
+            break;
+        }
+    }
+  munmap (auxmap, memneed);
+  close (fd);
+  return 0;
+
+ fail1:
+  munmap (auxmap, memneed);
+ fail2:
+  close (fd);
+  return -1;
+
+# else
+  /* We must use the newer /proc interface.
+     Documentation:
+     https://docs.oracle.com/cd/E23824_01/html/821-1473/proc-4.html
+     The contents of /proc/<pid>/map consists of records of type
+     prmap_t.  These are different in 32-bit and 64-bit processes,
+     but here we are fortunately accessing only the current process.  */
+
+  char fnamebuf[6+10+4+1];
+  char *fname;
+  int fd;
+  int nmaps;
+  size_t memneed;
+#  if HAVE_MAP_ANONYMOUS
+#   define zero_fd -1
+#   define map_flags MAP_ANONYMOUS
+#  else /* !HAVE_MAP_ANONYMOUS */
+  int zero_fd;
+#   define map_flags 0
+#  endif
+  void *auxmap;
+  uintptr_t auxmap_start;
+  uintptr_t auxmap_end;
+  prmap_t* maps;
+  prmap_t* maps_end;
+  prmap_t* mp;
+
+  if (pagesize == 0)
+    init_pagesize ();
+
+  /* Construct fname = sprintf (fnamebuf+i, "/proc/%u/map", getpid ()).  */
+  fname = fnamebuf + sizeof (fnamebuf) - 1 - 4;
+  memcpy (fname, "/map", 4 + 1);
+  {
+    unsigned int value = getpid ();
+    do
+      *--fname = (value % 10) + '0';
+    while ((value = value / 10) > 0);
+  }
+  fname -= 6;
+  memcpy (fname, "/proc/", 6);
+
+  fd = open (fname, O_RDONLY);
+  if (fd < 0)
+    return -1;
+
+  {
+    struct stat statbuf;
+    if (fstat (fd, &statbuf) < 0)
+      goto fail2;
+    nmaps = statbuf.st_size / sizeof (prmap_t);
+  }
+
+  memneed = (nmaps + 10) * sizeof (prmap_t);
+  /* Allocate memneed bytes of memory.
+     We cannot use alloca here, because not much stack space is guaranteed.
+     We also cannot use malloc here, because a malloc() call may call mmap()
+     and thus pre-allocate available memory.
+     So use mmap(), and ignore the resulting VMA.  */
+  memneed = ((memneed - 1) / pagesize + 1) * pagesize;
+#  if !HAVE_MAP_ANONYMOUS
+  zero_fd = open ("/dev/zero", O_RDONLY, 0644);
+  if (zero_fd < 0)
+    goto fail2;
+#  endif
+  auxmap = (void *) mmap ((void *) 0, memneed, PROT_READ | PROT_WRITE,
+                          map_flags | MAP_PRIVATE, zero_fd, 0);
+#  if !HAVE_MAP_ANONYMOUS
+  close (zero_fd);
+#  endif
+  if (auxmap == (void *) -1)
+    goto fail2;
+  auxmap_start = (uintptr_t) auxmap;
+  auxmap_end = auxmap_start + memneed;
+  maps = (prmap_t *) auxmap;
+
+  /* Read up to memneed bytes from fd into maps.  */
+  {
+    size_t remaining = memneed;
+    size_t total_read = 0;
+    char *ptr = (char *) maps;
+
+    do
+      {
+        size_t nread = read (fd, ptr, remaining);
+        if (nread == (size_t)-1)
+          {
+            if (errno == EINTR)
+              continue;
+            goto fail1;
+          }
+        if (nread == 0)
+          /* EOF */
+          break;
+        total_read += nread;
+        ptr += nread;
+        remaining -= nread;
+      }
+    while (remaining > 0);
+
+    nmaps = (memneed - remaining) / sizeof (prmap_t);
+    maps_end = maps + nmaps;
+  }
+
+  for (mp = maps; mp < maps_end; mp++)
+    {
+      uintptr_t start, end;
+
+      start = (uintptr_t) mp->pr_vaddr;
+      end = start + mp->pr_size;
+      if (start <= auxmap_start && auxmap_end - 1 <= end - 1)
+        {
+          /* Consider [start,end-1] \ [auxmap_start,auxmap_end-1]
+             = [start,auxmap_start-1] u [auxmap_end,end-1].  */
+          if (start < auxmap_start)
+            if (callback (locals, start, auxmap_start))
+              break;
+          if (auxmap_end - 1 < end - 1)
+            if (callback (locals, auxmap_end, end))
+              break;
+        }
+      else
+        {
+          if (callback (locals, start, end))
+            break;
+        }
+    }
+  munmap (auxmap, memneed);
+  close (fd);
+  return 0;
+
+ fail1:
+  munmap (auxmap, memneed);
+ fail2:
+  close (fd);
+  return -1;
+
+# endif
+}
+
+int
+sigsegv_get_vma (uintptr_t address, struct vma_struct *vma)
+{
+  struct callback_locals locals;
+  locals.address = address;
+  locals.vma = vma;
+# if STACK_DIRECTION < 0
+  locals.prev = 0;
+# else
+  locals.stop_at_next_vma = 0;
+# endif
+  locals.retval = -1;
+
+  vma_iterate (&locals);
+  if (locals.retval == 0)
+    {
+# if !(STACK_DIRECTION < 0)
+      if (locals.stop_at_next_vma)
+        vma->next_start = 0;
+# endif
+      vma->is_near_this = simple_is_near_this;
+      return 0;
+    }
+
+# if defined __sun
+  return mincore_get_vma (address, vma);
+# else
+  return -1;
+# endif
+}
+
+/* -------------------------------------------------------------------------- */
+
+#elif defined __CYGWIN__ /* Cygwin */
+
+struct callback_locals
+{
+  uintptr_t address;
+  struct vma_struct *vma;
+  /* The stack appears as three adjacents segments, therefore we
+     merge adjacent segments.  */
+  uintptr_t curr_start, curr_end;
+# if STACK_DIRECTION < 0
+  uintptr_t prev_end;
+# else
+  int stop_at_next_vma;
+# endif
+  int retval;
+};
+
+static int
+callback (struct callback_locals *locals, uintptr_t start, uintptr_t end)
+{
+  if (start == locals->curr_end)
+    {
+      /* Merge adjacent segments.  */
+      locals->curr_end = end;
+      return 0;
+    }
+# if STACK_DIRECTION < 0
+  if (locals->curr_start < locals->curr_end
+      && locals->address >= locals->curr_start
+      && locals->address <= locals->curr_end - 1)
+    {
+      locals->vma->start = locals->curr_start;
+      locals->vma->end = locals->curr_end;
+      locals->vma->prev_end = locals->prev_end;
+      locals->retval = 0;
+      return 1;
+    }
+  locals->prev_end = locals->curr_end;
+# else
+  if (locals->stop_at_next_vma)
+    {
+      locals->vma->next_start = locals->curr_start;
+      locals->stop_at_next_vma = 0;
+      return 1;
+    }
+  if (locals->curr_start < locals->curr_end
+      && locals->address >= locals->curr_start
+      && locals->address <= locals->curr_end - 1)
+    {
+      locals->vma->start = locals->curr_start;
+      locals->vma->end = locals->curr_end;
+      locals->retval = 0;
+      locals->stop_at_next_vma = 1;
+      return 0;
+    }
+# endif
+  locals->curr_start = start; locals->curr_end = end;
+  return 0;
+}
+
+int
+sigsegv_get_vma (uintptr_t address, struct vma_struct *vma)
+{
+  struct callback_locals locals;
+  locals.address = address;
+  locals.vma = vma;
+  locals.curr_start = 0;
+  locals.curr_end = 0;
+# if STACK_DIRECTION < 0
+  locals.prev_end = 0;
+# else
+  locals.stop_at_next_vma = 0;
+# endif
+  locals.retval = -1;
+
+  vma_iterate (&locals);
+  if (locals.retval < 0)
+    {
+      if (locals.curr_start < locals.curr_end
+          && address >= locals.curr_start && address <= locals.curr_end - 1)
+        {
+          vma->start = locals.curr_start;
+          vma->end = locals.curr_end;
+# if STACK_DIRECTION < 0
+          vma->prev_end = locals.prev_end;
+# else
+          vma->next_start = 0;
+# endif
+          locals.retval = 0;
+        }
+    }
+  if (locals.retval == 0)
+    {
+# if !(STACK_DIRECTION < 0)
+      if (locals.stop_at_next_vma)
+        vma->next_start = 0;
+# endif
+      vma->is_near_this = simple_is_near_this;
+      return 0;
+    }
+
+  return -1;
+}
+
+/* ---------------------------- stackvma-beos.h ---------------------------- */
+
+#elif defined __HAIKU__ /* Haiku */
+
+# include <OS.h> /* get_next_area_info */
+
+struct callback_locals
+{
+  uintptr_t address;
+  struct vma_struct *vma;
+# if STACK_DIRECTION < 0
+  uintptr_t prev;
+# else
+  int stop_at_next_vma;
+# endif
+  int retval;
+};
+
+static int
+callback (struct callback_locals *locals, uintptr_t start, uintptr_t end)
+{
+# if STACK_DIRECTION < 0
+  if (locals->address >= start && locals->address <= end - 1)
+    {
+      locals->vma->start = start;
+      locals->vma->end = end;
+      locals->vma->prev_end = locals->prev;
+      locals->retval = 0;
+      return 1;
+    }
+  locals->prev = end;
+# else
+  if (locals->stop_at_next_vma)
+    {
+      locals->vma->next_start = start;
+      locals->stop_at_next_vma = 0;
+      return 1;
+    }
+  if (locals->address >= start && locals->address <= end - 1)
+    {
+      locals->vma->start = start;
+      locals->vma->end = end;
+      locals->retval = 0;
+      locals->stop_at_next_vma = 1;
+      return 0;
+    }
+# endif
+  return 0;
+}
+
+/* Iterate over the virtual memory areas of the current process.
+   If such iteration is supported, the callback is called once for every
+   virtual memory area, in ascending order, with the following arguments:
+     - LOCALS is the same argument as passed to vma_iterate.
+     - START is the address of the first byte in the area, page-aligned.
+     - END is the address of the last byte in the area plus 1, page-aligned.
+       Note that it may be 0 for the last area in the address space.
+   If the callback returns 0, the iteration continues.  If it returns 1,
+   the iteration terminates prematurely.
+   This function may open file descriptors, but does not call malloc().
+   Return 0 if all went well, or -1 in case of error.  */
+/* This code is a simplified copy (no handling of protection flags) of the
+   code in gnulib's lib/vma-iter.c.  */
+static int
+vma_iterate (struct callback_locals *locals)
+{
+  area_info info;
+  ssize_t cookie;
+
+  cookie = 0;
+  while (get_next_area_info (0, &cookie, &info) == B_OK)
+    {
+      uintptr_t start, end;
+
+      start = (uintptr_t) info.address;
+      end = start + info.size;
+
+      if (callback (locals, start, end))
+        break;
+    }
+  return 0;
+}
+
+int
+sigsegv_get_vma (uintptr_t address, struct vma_struct *vma)
+{
+  struct callback_locals locals;
+  locals.address = address;
+  locals.vma = vma;
+# if STACK_DIRECTION < 0
+  locals.prev = 0;
+# else
+  locals.stop_at_next_vma = 0;
+# endif
+  locals.retval = -1;
+
+  vma_iterate (&locals);
+  if (locals.retval == 0)
+    {
+# if !(STACK_DIRECTION < 0)
+      if (locals.stop_at_next_vma)
+        vma->next_start = 0;
+# endif
+      vma->is_near_this = simple_is_near_this;
+      return 0;
+    }
+  return -1;
+}
+
+/* -------------------------------------------------------------------------- */
+
+#else /* Hurd, Minix, ... */
+
+int
+sigsegv_get_vma (uintptr_t address, struct vma_struct *vma)
+{
+  /* No way.  */
+  return -1;
+}
+
+#endif
diff --git a/src/grep/lib/stackvma.h b/src/grep/lib/stackvma.h
new file mode 100644
index 0000000..1f214a4
--- /dev/null
+++ b/src/grep/lib/stackvma.h
@@ -0,0 +1,62 @@
+/* Determine the virtual memory area of a given address.
+   Copyright (C) 2002-2021 Free Software Foundation, Inc.
+   Copyright (C) 2003-2006  Paolo Bonzini <bonzini@gnu.org>
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible and Paolo Bonzini.  */
+
+#ifndef _STACKVMA_H
+#define _STACKVMA_H
+
+#include <stdint.h>
+
+/* Describes a virtual memory area, with some info about the gap between
+   it and the next or previous virtual memory area.  */
+struct vma_struct
+{
+  uintptr_t start;
+  uintptr_t end;
+#if STACK_DIRECTION < 0
+  /* Info about the gap between this VMA and the previous one.
+     addr must be < vma->start.  */
+  int (*is_near_this) (uintptr_t addr, struct vma_struct *vma);
+  /* Private field, not provided by all sigsegv_get_vma implementations.  */
+  uintptr_t prev_end;
+#endif
+#if STACK_DIRECTION > 0
+  /* Info about the gap between this VMA and the next one.
+     addr must be > vma->end - 1.  */
+  int (*is_near_this) (uintptr_t addr, struct vma_struct *vma);
+  /* Private field, not provided by all sigsegv_get_vma implementations.  */
+  uintptr_t next_start;
+#endif
+};
+
+/* Determines the virtual memory area to which a given address belongs,
+   and returns 0.  Returns -1 if it cannot be determined.
+   This function is used to determine the stack extent when a fault occurs.  */
+extern int sigsegv_get_vma (uintptr_t address, struct vma_struct *vma);
+
+/* Defined if sigsegv_get_vma actually works (i.e. does not always fail).  */
+#if defined __linux__ || defined __ANDROID__ \
+    || defined __FreeBSD_kernel__ || defined __FreeBSD__ || defined __DragonFly__ \
+    || defined __NetBSD__ || defined __OpenBSD__ \
+    || (defined __APPLE__ && defined __MACH__) \
+    || defined _AIX || defined __sgi || defined __sun \
+    || defined __CYGWIN__ || defined __HAIKU__
+# define HAVE_STACKVMA 1
+#endif
+
+#endif /* _STACKVMA_H */
diff --git a/src/grep/lib/stat-time.c b/src/grep/lib/stat-time.c
new file mode 100644
index 0000000..7b92792
--- /dev/null
+++ b/src/grep/lib/stat-time.c
@@ -0,0 +1,21 @@
+/* stat-related time functions.
+
+   Copyright (C) 2012-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#define _GL_STAT_TIME_INLINE _GL_EXTERN_INLINE
+#include "stat-time.h"
diff --git a/src/grep/lib/stat-time.h b/src/grep/lib/stat-time.h
new file mode 100644
index 0000000..fe3483d
--- /dev/null
+++ b/src/grep/lib/stat-time.h
@@ -0,0 +1,252 @@
+/* stat-related time functions.
+
+   Copyright (C) 2005, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+#ifndef STAT_TIME_H
+#define STAT_TIME_H 1
+
+#include "intprops.h"
+
+#include <errno.h>
+#include <stddef.h>
+#include <sys/stat.h>
+#include <time.h>
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef _GL_STAT_TIME_INLINE
+# define _GL_STAT_TIME_INLINE _GL_INLINE
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* STAT_TIMESPEC (ST, ST_XTIM) is the ST_XTIM member for *ST of type
+   struct timespec, if available.  If not, then STAT_TIMESPEC_NS (ST,
+   ST_XTIM) is the nanosecond component of the ST_XTIM member for *ST,
+   if available.  ST_XTIM can be st_atim, st_ctim, st_mtim, or st_birthtim
+   for access, status change, data modification, or birth (creation)
+   time respectively.
+
+   These macros are private to stat-time.h.  */
+#if _GL_WINDOWS_STAT_TIMESPEC || defined HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC
+# if _GL_WINDOWS_STAT_TIMESPEC || defined TYPEOF_STRUCT_STAT_ST_ATIM_IS_STRUCT_TIMESPEC
+#  define STAT_TIMESPEC(st, st_xtim) ((st)->st_xtim)
+# else
+#  define STAT_TIMESPEC_NS(st, st_xtim) ((st)->st_xtim.tv_nsec)
+# endif
+#elif defined HAVE_STRUCT_STAT_ST_ATIMESPEC_TV_NSEC
+# define STAT_TIMESPEC(st, st_xtim) ((st)->st_xtim##espec)
+#elif defined HAVE_STRUCT_STAT_ST_ATIMENSEC
+# define STAT_TIMESPEC_NS(st, st_xtim) ((st)->st_xtim##ensec)
+#elif defined HAVE_STRUCT_STAT_ST_ATIM_ST__TIM_TV_NSEC
+# define STAT_TIMESPEC_NS(st, st_xtim) ((st)->st_xtim.st__tim.tv_nsec)
+#endif
+
+/* Return the nanosecond component of *ST's access time.  */
+_GL_STAT_TIME_INLINE long int _GL_ATTRIBUTE_PURE
+get_stat_atime_ns (struct stat const *st)
+{
+# if defined STAT_TIMESPEC
+  return STAT_TIMESPEC (st, st_atim).tv_nsec;
+# elif defined STAT_TIMESPEC_NS
+  return STAT_TIMESPEC_NS (st, st_atim);
+# else
+  return 0;
+# endif
+}
+
+/* Return the nanosecond component of *ST's status change time.  */
+_GL_STAT_TIME_INLINE long int _GL_ATTRIBUTE_PURE
+get_stat_ctime_ns (struct stat const *st)
+{
+# if defined STAT_TIMESPEC
+  return STAT_TIMESPEC (st, st_ctim).tv_nsec;
+# elif defined STAT_TIMESPEC_NS
+  return STAT_TIMESPEC_NS (st, st_ctim);
+# else
+  return 0;
+# endif
+}
+
+/* Return the nanosecond component of *ST's data modification time.  */
+_GL_STAT_TIME_INLINE long int _GL_ATTRIBUTE_PURE
+get_stat_mtime_ns (struct stat const *st)
+{
+# if defined STAT_TIMESPEC
+  return STAT_TIMESPEC (st, st_mtim).tv_nsec;
+# elif defined STAT_TIMESPEC_NS
+  return STAT_TIMESPEC_NS (st, st_mtim);
+# else
+  return 0;
+# endif
+}
+
+/* Return the nanosecond component of *ST's birth time.  */
+_GL_STAT_TIME_INLINE long int _GL_ATTRIBUTE_PURE
+get_stat_birthtime_ns (struct stat const *st _GL_UNUSED)
+{
+# if defined HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC
+  return STAT_TIMESPEC (st, st_birthtim).tv_nsec;
+# elif defined HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC
+  return STAT_TIMESPEC_NS (st, st_birthtim);
+# else
+  return 0;
+# endif
+}
+
+/* Return *ST's access time.  */
+_GL_STAT_TIME_INLINE struct timespec _GL_ATTRIBUTE_PURE
+get_stat_atime (struct stat const *st)
+{
+#ifdef STAT_TIMESPEC
+  return STAT_TIMESPEC (st, st_atim);
+#else
+  struct timespec t;
+  t.tv_sec = st->st_atime;
+  t.tv_nsec = get_stat_atime_ns (st);
+  return t;
+#endif
+}
+
+/* Return *ST's status change time.  */
+_GL_STAT_TIME_INLINE struct timespec _GL_ATTRIBUTE_PURE
+get_stat_ctime (struct stat const *st)
+{
+#ifdef STAT_TIMESPEC
+  return STAT_TIMESPEC (st, st_ctim);
+#else
+  struct timespec t;
+  t.tv_sec = st->st_ctime;
+  t.tv_nsec = get_stat_ctime_ns (st);
+  return t;
+#endif
+}
+
+/* Return *ST's data modification time.  */
+_GL_STAT_TIME_INLINE struct timespec _GL_ATTRIBUTE_PURE
+get_stat_mtime (struct stat const *st)
+{
+#ifdef STAT_TIMESPEC
+  return STAT_TIMESPEC (st, st_mtim);
+#else
+  struct timespec t;
+  t.tv_sec = st->st_mtime;
+  t.tv_nsec = get_stat_mtime_ns (st);
+  return t;
+#endif
+}
+
+/* Return *ST's birth time, if available; otherwise return a value
+   with tv_sec and tv_nsec both equal to -1.  */
+_GL_STAT_TIME_INLINE struct timespec _GL_ATTRIBUTE_PURE
+get_stat_birthtime (struct stat const *st _GL_UNUSED)
+{
+  struct timespec t;
+
+#if (defined HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC \
+     || defined HAVE_STRUCT_STAT_ST_BIRTHTIM_TV_NSEC)
+  t = STAT_TIMESPEC (st, st_birthtim);
+#elif defined HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC
+  t.tv_sec = st->st_birthtime;
+  t.tv_nsec = st->st_birthtimensec;
+#elif defined _WIN32 && ! defined __CYGWIN__
+  /* Native Windows platforms (but not Cygwin) put the "file creation
+     time" in st_ctime (!).  See
+     <https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/stat-functions>.  */
+# if _GL_WINDOWS_STAT_TIMESPEC
+  t = st->st_ctim;
+# else
+  t.tv_sec = st->st_ctime;
+  t.tv_nsec = 0;
+# endif
+#else
+  /* Birth time is not supported.  */
+  t.tv_sec = -1;
+  t.tv_nsec = -1;
+#endif
+
+#if (defined HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC \
+     || defined HAVE_STRUCT_STAT_ST_BIRTHTIM_TV_NSEC \
+     || defined HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC)
+  /* FreeBSD and NetBSD sometimes signal the absence of knowledge by
+     using zero.  Attempt to work around this problem.  Alas, this can
+     report failure even for valid timestamps.  Also, NetBSD
+     sometimes returns junk in the birth time fields; work around this
+     bug if it is detected.  */
+  if (! (t.tv_sec && 0 <= t.tv_nsec && t.tv_nsec < 1000000000))
+    {
+      t.tv_sec = -1;
+      t.tv_nsec = -1;
+    }
+#endif
+
+  return t;
+}
+
+/* If a stat-like function returned RESULT, normalize the timestamps
+   in *ST, in case this platform suffers from the Solaris 11 bug where
+   tv_nsec might be negative.  Return the adjusted RESULT, setting
+   errno to EOVERFLOW if normalization overflowed.  This function
+   is intended to be private to this .h file.  */
+_GL_STAT_TIME_INLINE int
+stat_time_normalize (int result, struct stat *st _GL_UNUSED)
+{
+#if defined __sun && defined STAT_TIMESPEC
+  if (result == 0)
+    {
+      long int timespec_hz = 1000000000;
+      short int const ts_off[] = { offsetof (struct stat, st_atim),
+                                   offsetof (struct stat, st_mtim),
+                                   offsetof (struct stat, st_ctim) };
+      int i;
+      for (i = 0; i < sizeof ts_off / sizeof *ts_off; i++)
+        {
+          struct timespec *ts = (struct timespec *) ((char *) st + ts_off[i]);
+          long int q = ts->tv_nsec / timespec_hz;
+          long int r = ts->tv_nsec % timespec_hz;
+          if (r < 0)
+            {
+              r += timespec_hz;
+              q--;
+            }
+          ts->tv_nsec = r;
+          /* Overflow is possible, as Solaris 11 stat can yield
+             tv_sec == TYPE_MINIMUM (time_t) && tv_nsec == -1000000000.
+             INT_ADD_WRAPV is OK, since time_t is signed on Solaris.  */
+          if (INT_ADD_WRAPV (q, ts->tv_sec, &ts->tv_sec))
+            {
+              errno = EOVERFLOW;
+              return -1;
+            }
+        }
+    }
+#endif
+  return result;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+_GL_INLINE_HEADER_END
+
+#endif
diff --git a/src/grep/lib/stat-w32.c b/src/grep/lib/stat-w32.c
new file mode 100644
index 0000000..4164199
--- /dev/null
+++ b/src/grep/lib/stat-w32.c
@@ -0,0 +1,461 @@
+/* Core of implementation of fstat and stat for native Windows.
+   Copyright (C) 2017-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible.  */
+
+#include <config.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+
+/* Attempt to make <windows.h> define FILE_ID_INFO.
+   But ensure that the redefinition of _WIN32_WINNT does not make us assume
+   Windows Vista or newer when building for an older version of Windows.  */
+#if HAVE_SDKDDKVER_H
+# include <sdkddkver.h>
+# if _WIN32_WINNT >= _WIN32_WINNT_VISTA
+#  define WIN32_ASSUME_VISTA 1
+# else
+#  define WIN32_ASSUME_VISTA 0
+# endif
+# if !defined _WIN32_WINNT || (_WIN32_WINNT < _WIN32_WINNT_WIN8)
+#  undef _WIN32_WINNT
+#  define _WIN32_WINNT _WIN32_WINNT_WIN8
+# endif
+#else
+# define WIN32_ASSUME_VISTA (_WIN32_WINNT >= _WIN32_WINNT_VISTA)
+#endif
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <limits.h>
+#include <string.h>
+#include <unistd.h>
+#include <windows.h>
+
+/* Specification.  */
+#include "stat-w32.h"
+
+#include "pathmax.h"
+#include "verify.h"
+
+/* Don't assume that UNICODE is not defined.  */
+#undef LoadLibrary
+#define LoadLibrary LoadLibraryA
+#undef GetFinalPathNameByHandle
+#define GetFinalPathNameByHandle GetFinalPathNameByHandleA
+
+/* Older mingw headers do not define VOLUME_NAME_NONE.  */
+#ifndef VOLUME_NAME_NONE
+# define VOLUME_NAME_NONE 4
+#endif
+
+#if !WIN32_ASSUME_VISTA
+
+/* Avoid warnings from gcc -Wcast-function-type.  */
+# define GetProcAddress \
+   (void *) GetProcAddress
+
+# if _GL_WINDOWS_STAT_INODES == 2
+/* GetFileInformationByHandleEx was introduced only in Windows Vista.  */
+typedef DWORD (WINAPI * GetFileInformationByHandleExFuncType) (HANDLE hFile,
+                                                               FILE_INFO_BY_HANDLE_CLASS fiClass,
+                                                               LPVOID lpBuffer,
+                                                               DWORD dwBufferSize);
+static GetFileInformationByHandleExFuncType GetFileInformationByHandleExFunc = NULL;
+# endif
+/* GetFinalPathNameByHandle was introduced only in Windows Vista.  */
+typedef DWORD (WINAPI * GetFinalPathNameByHandleFuncType) (HANDLE hFile,
+                                                           LPSTR lpFilePath,
+                                                           DWORD lenFilePath,
+                                                           DWORD dwFlags);
+static GetFinalPathNameByHandleFuncType GetFinalPathNameByHandleFunc = NULL;
+static BOOL initialized = FALSE;
+
+static void
+initialize (void)
+{
+  HMODULE kernel32 = LoadLibrary ("kernel32.dll");
+  if (kernel32 != NULL)
+    {
+# if _GL_WINDOWS_STAT_INODES == 2
+      GetFileInformationByHandleExFunc =
+        (GetFileInformationByHandleExFuncType) GetProcAddress (kernel32, "GetFileInformationByHandleEx");
+# endif
+      GetFinalPathNameByHandleFunc =
+        (GetFinalPathNameByHandleFuncType) GetProcAddress (kernel32, "GetFinalPathNameByHandleA");
+    }
+  initialized = TRUE;
+}
+
+#else
+
+# define GetFileInformationByHandleExFunc GetFileInformationByHandleEx
+# define GetFinalPathNameByHandleFunc GetFinalPathNameByHandle
+
+#endif
+
+/* Converts a FILETIME to GMT time since 1970-01-01 00:00:00.  */
+#if _GL_WINDOWS_STAT_TIMESPEC
+struct timespec
+_gl_convert_FILETIME_to_timespec (const FILETIME *ft)
+{
+  struct timespec result;
+  /* FILETIME: <https://docs.microsoft.com/en-us/windows/desktop/api/minwinbase/ns-minwinbase-filetime> */
+  unsigned long long since_1601 =
+    ((unsigned long long) ft->dwHighDateTime << 32)
+    | (unsigned long long) ft->dwLowDateTime;
+  if (since_1601 == 0)
+    {
+      result.tv_sec = 0;
+      result.tv_nsec = 0;
+    }
+  else
+    {
+      /* Between 1601-01-01 and 1970-01-01 there were 280 normal years and 89
+         leap years, in total 134774 days.  */
+      unsigned long long since_1970 =
+        since_1601 - (unsigned long long) 134774 * (unsigned long long) 86400 * (unsigned long long) 10000000;
+      result.tv_sec = since_1970 / (unsigned long long) 10000000;
+      result.tv_nsec = (unsigned long) (since_1970 % (unsigned long long) 10000000) * 100;
+    }
+  return result;
+}
+#else
+time_t
+_gl_convert_FILETIME_to_POSIX (const FILETIME *ft)
+{
+  /* FILETIME: <https://docs.microsoft.com/en-us/windows/desktop/api/minwinbase/ns-minwinbase-filetime> */
+  unsigned long long since_1601 =
+    ((unsigned long long) ft->dwHighDateTime << 32)
+    | (unsigned long long) ft->dwLowDateTime;
+  if (since_1601 == 0)
+    return 0;
+  else
+    {
+      /* Between 1601-01-01 and 1970-01-01 there were 280 normal years and 89
+         leap years, in total 134774 days.  */
+      unsigned long long since_1970 =
+        since_1601 - (unsigned long long) 134774 * (unsigned long long) 86400 * (unsigned long long) 10000000;
+      return since_1970 / (unsigned long long) 10000000;
+    }
+}
+#endif
+
+/* Fill *BUF with information about the file designated by H.
+   PATH is the file name, if known, otherwise NULL.
+   Return 0 if successful, or -1 with errno set upon failure.  */
+int
+_gl_fstat_by_handle (HANDLE h, const char *path, struct stat *buf)
+{
+  /* GetFileType
+     <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getfiletype> */
+  DWORD type = GetFileType (h);
+  if (type == FILE_TYPE_DISK)
+    {
+#if !WIN32_ASSUME_VISTA
+      if (!initialized)
+        initialize ();
+#endif
+
+      /* st_mode can be determined through
+         GetFileAttributesEx
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getfileattributesexa>
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/ns-fileapi-_win32_file_attribute_data>
+         or through
+         GetFileInformationByHandle
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getfileinformationbyhandle>
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/ns-fileapi-_by_handle_file_information>
+         or through
+         GetFileInformationByHandleEx with argument FileBasicInfo
+         <https://docs.microsoft.com/en-us/windows/desktop/api/winbase/nf-winbase-getfileinformationbyhandleex>
+         <https://docs.microsoft.com/en-us/windows/desktop/api/winbase/ns-winbase-_file_basic_info>
+         The latter requires -D_WIN32_WINNT=_WIN32_WINNT_VISTA or higher.  */
+      BY_HANDLE_FILE_INFORMATION info;
+      if (! GetFileInformationByHandle (h, &info))
+        goto failed;
+
+      /* Test for error conditions before starting to fill *buf.  */
+      if (sizeof (buf->st_size) <= 4 && info.nFileSizeHigh > 0)
+        {
+          errno = EOVERFLOW;
+          return -1;
+        }
+
+#if _GL_WINDOWS_STAT_INODES
+      /* st_ino can be determined through
+         GetFileInformationByHandle
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getfileinformationbyhandle>
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/ns-fileapi-_by_handle_file_information>
+         as 64 bits, or through
+         GetFileInformationByHandleEx with argument FileIdInfo
+         <https://docs.microsoft.com/en-us/windows/desktop/api/winbase/nf-winbase-getfileinformationbyhandleex>
+         <https://docs.microsoft.com/en-us/windows/desktop/api/winbase/ns-winbase-_file_id_info>
+         as 128 bits.
+         The latter requires -D_WIN32_WINNT=_WIN32_WINNT_WIN8 or higher.  */
+      /* Experiments show that GetFileInformationByHandleEx does not provide
+         much more information than GetFileInformationByHandle:
+           * The dwVolumeSerialNumber from GetFileInformationByHandle is equal
+             to the low 32 bits of the 64-bit VolumeSerialNumber from
+             GetFileInformationByHandleEx, and is apparently sufficient for
+             identifying the device.
+           * The nFileIndex from GetFileInformationByHandle is equal to the low
+             64 bits of the 128-bit FileId from GetFileInformationByHandleEx,
+             and the high 64 bits of this 128-bit FileId are zero.
+           * On a FAT file system, GetFileInformationByHandleEx fails with error
+             ERROR_INVALID_PARAMETER, whereas GetFileInformationByHandle
+             succeeds.
+           * On a CIFS/SMB file system, GetFileInformationByHandleEx fails with
+             error ERROR_INVALID_LEVEL, whereas GetFileInformationByHandle
+             succeeds.  */
+# if _GL_WINDOWS_STAT_INODES == 2
+      if (GetFileInformationByHandleExFunc != NULL)
+        {
+          FILE_ID_INFO id;
+          if (GetFileInformationByHandleExFunc (h, FileIdInfo, &id, sizeof (id)))
+            {
+              buf->st_dev = id.VolumeSerialNumber;
+              verify (sizeof (ino_t) == sizeof (id.FileId));
+              memcpy (&buf->st_ino, &id.FileId, sizeof (ino_t));
+              goto ino_done;
+            }
+          else
+            {
+              switch (GetLastError ())
+                {
+                case ERROR_INVALID_PARAMETER: /* older Windows version, or FAT */
+                case ERROR_INVALID_LEVEL: /* CIFS/SMB file system */
+                  goto fallback;
+                default:
+                  goto failed;
+                }
+            }
+        }
+     fallback: ;
+      /* Fallback for older Windows versions.  */
+      buf->st_dev = info.dwVolumeSerialNumber;
+      buf->st_ino._gl_ino[0] = ((ULONGLONG) info.nFileIndexHigh << 32) | (ULONGLONG) info.nFileIndexLow;
+      buf->st_ino._gl_ino[1] = 0;
+     ino_done: ;
+# else /* _GL_WINDOWS_STAT_INODES == 1 */
+      buf->st_dev = info.dwVolumeSerialNumber;
+      buf->st_ino = ((ULONGLONG) info.nFileIndexHigh << 32) | (ULONGLONG) info.nFileIndexLow;
+# endif
+#else
+      /* st_ino is not wide enough for identifying a file on a device.
+         Without st_ino, st_dev is pointless.  */
+      buf->st_dev = 0;
+      buf->st_ino = 0;
+#endif
+
+      /* st_mode.  */
+      unsigned int mode =
+        /* XXX How to handle FILE_ATTRIBUTE_REPARSE_POINT ?  */
+        ((info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ? _S_IFDIR | S_IEXEC_UGO : _S_IFREG)
+        | S_IREAD_UGO
+        | ((info.dwFileAttributes & FILE_ATTRIBUTE_READONLY) ? 0 : S_IWRITE_UGO);
+      if (!(info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
+        {
+          /* Determine whether the file is executable by looking at the file
+             name suffix.
+             If the file name is already known, use it. Otherwise, for
+             non-empty files, it can be determined through
+             GetFinalPathNameByHandle
+             <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getfinalpathnamebyhandlea>
+             or through
+             GetFileInformationByHandleEx with argument FileNameInfo
+             <https://docs.microsoft.com/en-us/windows/desktop/api/winbase/nf-winbase-getfileinformationbyhandleex>
+             <https://docs.microsoft.com/en-us/windows/desktop/api/winbase/ns-winbase-_file_name_info>
+             Both require -D_WIN32_WINNT=_WIN32_WINNT_VISTA or higher.  */
+          if (info.nFileSizeHigh > 0 || info.nFileSizeLow > 0)
+            {
+              char fpath[PATH_MAX];
+              if (path != NULL
+                  || (GetFinalPathNameByHandleFunc != NULL
+                      && GetFinalPathNameByHandleFunc (h, fpath, sizeof (fpath), VOLUME_NAME_NONE)
+                         < sizeof (fpath)
+                      && (path = fpath, 1)))
+                {
+                  const char *last_dot = NULL;
+                  const char *p;
+                  for (p = path; *p != '\0'; p++)
+                    if (*p == '.')
+                      last_dot = p;
+                  if (last_dot != NULL)
+                    {
+                      const char *suffix = last_dot + 1;
+                      if (_stricmp (suffix, "exe") == 0
+                          || _stricmp (suffix, "bat") == 0
+                          || _stricmp (suffix, "cmd") == 0
+                          || _stricmp (suffix, "com") == 0)
+                        mode |= S_IEXEC_UGO;
+                    }
+                }
+              else
+                /* Cannot determine file name.  Pretend that it is executable.  */
+                mode |= S_IEXEC_UGO;
+            }
+        }
+      buf->st_mode = mode;
+
+      /* st_nlink can be determined through
+         GetFileInformationByHandle
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getfileinformationbyhandle>
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/ns-fileapi-_by_handle_file_information>
+         or through
+         GetFileInformationByHandleEx with argument FileStandardInfo
+         <https://docs.microsoft.com/en-us/windows/desktop/api/winbase/nf-winbase-getfileinformationbyhandleex>
+         <https://docs.microsoft.com/en-us/windows/desktop/api/winbase/ns-winbase-_file_standard_info>
+         The latter requires -D_WIN32_WINNT=_WIN32_WINNT_VISTA or higher.  */
+      buf->st_nlink = (info.nNumberOfLinks > SHRT_MAX ? SHRT_MAX : info.nNumberOfLinks);
+
+      /* There's no easy way to map the Windows SID concept to an integer.  */
+      buf->st_uid = 0;
+      buf->st_gid = 0;
+
+      /* st_rdev is irrelevant for normal files and directories.  */
+      buf->st_rdev = 0;
+
+      /* st_size can be determined through
+         GetFileSizeEx
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getfilesizeex>
+         or through
+         GetFileAttributesEx
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getfileattributesexa>
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/ns-fileapi-_win32_file_attribute_data>
+         or through
+         GetFileInformationByHandle
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getfileinformationbyhandle>
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/ns-fileapi-_by_handle_file_information>
+         or through
+         GetFileInformationByHandleEx with argument FileStandardInfo
+         <https://docs.microsoft.com/en-us/windows/desktop/api/winbase/nf-winbase-getfileinformationbyhandleex>
+         <https://docs.microsoft.com/en-us/windows/desktop/api/winbase/ns-winbase-_file_standard_info>
+         The latter requires -D_WIN32_WINNT=_WIN32_WINNT_VISTA or higher.  */
+      if (sizeof (buf->st_size) <= 4)
+        /* Range check already done above.  */
+        buf->st_size = info.nFileSizeLow;
+      else
+        buf->st_size = ((long long) info.nFileSizeHigh << 32) | (long long) info.nFileSizeLow;
+
+      /* st_atime, st_mtime, st_ctime can be determined through
+         GetFileTime
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getfiletime>
+         or through
+         GetFileAttributesEx
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getfileattributesexa>
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/ns-fileapi-_win32_file_attribute_data>
+         or through
+         GetFileInformationByHandle
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getfileinformationbyhandle>
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/ns-fileapi-_by_handle_file_information>
+         or through
+         GetFileInformationByHandleEx with argument FileBasicInfo
+         <https://docs.microsoft.com/en-us/windows/desktop/api/winbase/nf-winbase-getfileinformationbyhandleex>
+         <https://docs.microsoft.com/en-us/windows/desktop/api/winbase/ns-winbase-_file_basic_info>
+         The latter requires -D_WIN32_WINNT=_WIN32_WINNT_VISTA or higher.  */
+#if _GL_WINDOWS_STAT_TIMESPEC
+      buf->st_atim = _gl_convert_FILETIME_to_timespec (&info.ftLastAccessTime);
+      buf->st_mtim = _gl_convert_FILETIME_to_timespec (&info.ftLastWriteTime);
+      buf->st_ctim = _gl_convert_FILETIME_to_timespec (&info.ftCreationTime);
+#else
+      buf->st_atime = _gl_convert_FILETIME_to_POSIX (&info.ftLastAccessTime);
+      buf->st_mtime = _gl_convert_FILETIME_to_POSIX (&info.ftLastWriteTime);
+      buf->st_ctime = _gl_convert_FILETIME_to_POSIX (&info.ftCreationTime);
+#endif
+
+      return 0;
+    }
+  else if (type == FILE_TYPE_CHAR || type == FILE_TYPE_PIPE)
+    {
+      buf->st_dev = 0;
+#if _GL_WINDOWS_STAT_INODES == 2
+      buf->st_ino._gl_ino[0] = buf->st_ino._gl_ino[1] = 0;
+#else
+      buf->st_ino = 0;
+#endif
+      buf->st_mode = (type == FILE_TYPE_PIPE ? _S_IFIFO : _S_IFCHR);
+      buf->st_nlink = 1;
+      buf->st_uid = 0;
+      buf->st_gid = 0;
+      buf->st_rdev = 0;
+      if (type == FILE_TYPE_PIPE)
+        {
+          /* PeekNamedPipe
+             <https://msdn.microsoft.com/en-us/library/aa365779.aspx> */
+          DWORD bytes_available;
+          if (PeekNamedPipe (h, NULL, 0, NULL, &bytes_available, NULL))
+            buf->st_size = bytes_available;
+          else
+            buf->st_size = 0;
+        }
+      else
+        buf->st_size = 0;
+#if _GL_WINDOWS_STAT_TIMESPEC
+      buf->st_atim.tv_sec = 0; buf->st_atim.tv_nsec = 0;
+      buf->st_mtim.tv_sec = 0; buf->st_mtim.tv_nsec = 0;
+      buf->st_ctim.tv_sec = 0; buf->st_ctim.tv_nsec = 0;
+#else
+      buf->st_atime = 0;
+      buf->st_mtime = 0;
+      buf->st_ctime = 0;
+#endif
+      return 0;
+    }
+  else
+    {
+      errno = ENOENT;
+      return -1;
+    }
+
+ failed:
+  {
+    DWORD error = GetLastError ();
+    #if 0
+    fprintf (stderr, "_gl_fstat_by_handle error 0x%x\n", (unsigned int) error);
+    #endif
+    switch (error)
+      {
+      case ERROR_ACCESS_DENIED:
+      case ERROR_SHARING_VIOLATION:
+        errno = EACCES;
+        break;
+
+      case ERROR_OUTOFMEMORY:
+        errno = ENOMEM;
+        break;
+
+      case ERROR_WRITE_FAULT:
+      case ERROR_READ_FAULT:
+      case ERROR_GEN_FAILURE:
+        errno = EIO;
+        break;
+
+      default:
+        errno = EINVAL;
+        break;
+      }
+    return -1;
+  }
+}
+
+#else
+
+/* This declaration is solely to ensure that after preprocessing
+   this file is never empty.  */
+typedef int dummy;
+
+#endif
diff --git a/src/grep/lib/stat-w32.h b/src/grep/lib/stat-w32.h
new file mode 100644
index 0000000..5b56c09
--- /dev/null
+++ b/src/grep/lib/stat-w32.h
@@ -0,0 +1,37 @@
+/* Core of implementation of fstat and stat for native Windows.
+   Copyright (C) 2017-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _STAT_W32_H
+#define _STAT_W32_H 1
+
+/* Converts a FILETIME to GMT time since 1970-01-01 00:00:00.  */
+#if _GL_WINDOWS_STAT_TIMESPEC
+extern struct timespec _gl_convert_FILETIME_to_timespec (const FILETIME *ft);
+#else
+extern time_t _gl_convert_FILETIME_to_POSIX (const FILETIME *ft);
+#endif
+
+/* Fill *BUF with information about the file designated by H.
+   PATH is the file name, if known, otherwise NULL.
+   Return 0 if successful, or -1 with errno set upon failure.  */
+extern int _gl_fstat_by_handle (HANDLE h, const char *path, struct stat *buf);
+
+/* Bitmasks for st_mode.  */
+#define S_IREAD_UGO  (_S_IREAD | (_S_IREAD >> 3) | (_S_IREAD >> 6))
+#define S_IWRITE_UGO (_S_IWRITE | (_S_IWRITE >> 3) | (_S_IWRITE >> 6))
+#define S_IEXEC_UGO  (_S_IEXEC | (_S_IEXEC >> 3) | (_S_IEXEC >> 6))
+
+#endif /* _STAT_W32_H */
diff --git a/src/grep/lib/stat.c b/src/grep/lib/stat.c
new file mode 100644
index 0000000..bc9a767
--- /dev/null
+++ b/src/grep/lib/stat.c
@@ -0,0 +1,440 @@
+/* Work around platform bugs in stat.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake and Bruno Haible.  */
+
+/* If the user's config.h happens to include <sys/stat.h>, let it include only
+   the system's <sys/stat.h> here, so that orig_stat doesn't recurse to
+   rpl_stat.  */
+#define __need_system_sys_stat_h
+#include <config.h>
+
+/* Get the original definition of stat.  It might be defined as a macro.  */
+#include <sys/types.h>
+#include <sys/stat.h>
+#undef __need_system_sys_stat_h
+
+#if defined _WIN32 && ! defined __CYGWIN__
+# define WINDOWS_NATIVE
+#endif
+
+#if !defined WINDOWS_NATIVE
+
+static int
+orig_stat (const char *filename, struct stat *buf)
+{
+  return stat (filename, buf);
+}
+
+#endif
+
+/* Specification.  */
+#ifdef __osf__
+/* Write "sys/stat.h" here, not <sys/stat.h>, otherwise OSF/1 5.1 DTK cc
+   eliminates this include because of the preliminary #include <sys/stat.h>
+   above.  */
+# include "sys/stat.h"
+#else
+# include <sys/stat.h>
+#endif
+
+#include "stat-time.h"
+
+#include <errno.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <string.h>
+#include "filename.h"
+#include "malloca.h"
+#include "verify.h"
+
+#ifdef WINDOWS_NATIVE
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+# include "stat-w32.h"
+/* Don't assume that UNICODE is not defined.  */
+# undef WIN32_FIND_DATA
+# define WIN32_FIND_DATA WIN32_FIND_DATAA
+# undef CreateFile
+# define CreateFile CreateFileA
+# undef FindFirstFile
+# define FindFirstFile FindFirstFileA
+#endif
+
+#ifdef WINDOWS_NATIVE
+/* Return TRUE if the given file name denotes an UNC root.  */
+static BOOL
+is_unc_root (const char *rname)
+{
+  /* Test whether it has the syntax '\\server\share'.  */
+  if (ISSLASH (rname[0]) && ISSLASH (rname[1]))
+    {
+      /* It starts with two slashes.  Find the next slash.  */
+      const char *p = rname + 2;
+      const char *q = p;
+      while (*q != '\0' && !ISSLASH (*q))
+        q++;
+      if (q > p && *q != '\0')
+        {
+          /* Found the next slash at q.  */
+          q++;
+          const char *r = q;
+          while (*r != '\0' && !ISSLASH (*r))
+            r++;
+          if (r > q && *r == '\0')
+            return TRUE;
+        }
+    }
+  return FALSE;
+}
+#endif
+
+/* Store information about NAME into ST.  Work around bugs with
+   trailing slashes.  Mingw has other bugs (such as st_ino always
+   being 0 on success) which this wrapper does not work around.  But
+   at least this implementation provides the ability to emulate fchdir
+   correctly.  */
+
+int
+rpl_stat (char const *name, struct stat *buf)
+{
+#ifdef WINDOWS_NATIVE
+  /* Fill the fields ourselves, because the original stat function returns
+     values for st_atime, st_mtime, st_ctime that depend on the current time
+     zone.  See
+     <https://lists.gnu.org/r/bug-gnulib/2017-04/msg00134.html>  */
+  /* XXX Should we convert to wchar_t* and prepend '\\?\', in order to work
+     around length limitations
+     <https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file> ?  */
+
+  /* POSIX <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_13>
+     specifies: "More than two leading <slash> characters shall be treated as
+     a single <slash> character."  */
+  if (ISSLASH (name[0]) && ISSLASH (name[1]) && ISSLASH (name[2]))
+    {
+      name += 2;
+      while (ISSLASH (name[1]))
+        name++;
+    }
+
+  size_t len = strlen (name);
+  size_t drive_prefix_len = (HAS_DEVICE (name) ? 2 : 0);
+
+  /* Remove trailing slashes (except the very first one, at position
+     drive_prefix_len), but remember their presence.  */
+  size_t rlen;
+  bool check_dir = false;
+
+  rlen = len;
+  while (rlen > drive_prefix_len && ISSLASH (name[rlen-1]))
+    {
+      check_dir = true;
+      if (rlen == drive_prefix_len + 1)
+        break;
+      rlen--;
+    }
+
+  /* Handle '' and 'C:'.  */
+  if (!check_dir && rlen == drive_prefix_len)
+    {
+      errno = ENOENT;
+      return -1;
+    }
+
+  /* Handle '\\'.  */
+  if (rlen == 1 && ISSLASH (name[0]) && len >= 2)
+    {
+      errno = ENOENT;
+      return -1;
+    }
+
+  const char *rname;
+  char *malloca_rname;
+  if (rlen == len)
+    {
+      rname = name;
+      malloca_rname = NULL;
+    }
+  else
+    {
+      malloca_rname = malloca (rlen + 1);
+      if (malloca_rname == NULL)
+        {
+          errno = ENOMEM;
+          return -1;
+        }
+      memcpy (malloca_rname, name, rlen);
+      malloca_rname[rlen] = '\0';
+      rname = malloca_rname;
+    }
+
+  /* There are two ways to get at the requested information:
+       - by scanning the parent directory and examining the relevant
+         directory entry,
+       - by opening the file directly.
+     The first approach fails for root directories (e.g. 'C:\') and
+     UNC root directories (e.g. '\\server\share').
+     The second approach fails for some system files (e.g. 'C:\pagefile.sys'
+     and 'C:\hiberfil.sys'): ERROR_SHARING_VIOLATION.
+     The second approach gives more information (in particular, correct
+     st_dev, st_ino, st_nlink fields).
+     So we use the second approach and, as a fallback except for root and
+     UNC root directories, also the first approach.  */
+  {
+    int ret;
+
+    {
+      /* Approach based on the file.  */
+
+      /* Open a handle to the file.
+         CreateFile
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-createfilea>
+         <https://docs.microsoft.com/en-us/windows/desktop/FileIO/creating-and-opening-files>  */
+      HANDLE h =
+        CreateFile (rname,
+                    FILE_READ_ATTRIBUTES,
+                    FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+                    NULL,
+                    OPEN_EXISTING,
+                    /* FILE_FLAG_POSIX_SEMANTICS (treat file names that differ only
+                       in case as different) makes sense only when applied to *all*
+                       filesystem operations.  */
+                    FILE_FLAG_BACKUP_SEMANTICS /* | FILE_FLAG_POSIX_SEMANTICS */,
+                    NULL);
+      if (h != INVALID_HANDLE_VALUE)
+        {
+          ret = _gl_fstat_by_handle (h, rname, buf);
+          CloseHandle (h);
+          goto done;
+        }
+    }
+
+    /* Test for root and UNC root directories.  */
+    if ((rlen == drive_prefix_len + 1 && ISSLASH (rname[drive_prefix_len]))
+        || is_unc_root (rname))
+      goto failed;
+
+    /* Fallback.  */
+    {
+      /* Approach based on the directory entry.  */
+
+      if (strchr (rname, '?') != NULL || strchr (rname, '*') != NULL)
+        {
+          /* Other Windows API functions would fail with error
+             ERROR_INVALID_NAME.  */
+          if (malloca_rname != NULL)
+            freea (malloca_rname);
+          errno = ENOENT;
+          return -1;
+        }
+
+      /* Get the details about the directory entry.  This can be done through
+         FindFirstFile
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-findfirstfilea>
+         <https://docs.microsoft.com/en-us/windows/desktop/api/minwinbase/ns-minwinbase-_win32_find_dataa>
+         or through
+         FindFirstFileEx with argument FindExInfoBasic
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-findfirstfileexa>
+         <https://docs.microsoft.com/en-us/windows/desktop/api/minwinbase/ne-minwinbase-findex_info_levels>
+         <https://docs.microsoft.com/en-us/windows/desktop/api/minwinbase/ns-minwinbase-_win32_find_dataa>  */
+      WIN32_FIND_DATA info;
+      HANDLE h = FindFirstFile (rname, &info);
+      if (h == INVALID_HANDLE_VALUE)
+        goto failed;
+
+      /* Test for error conditions before starting to fill *buf.  */
+      if (sizeof (buf->st_size) <= 4 && info.nFileSizeHigh > 0)
+        {
+          FindClose (h);
+          if (malloca_rname != NULL)
+            freea (malloca_rname);
+          errno = EOVERFLOW;
+          return -1;
+        }
+
+# if _GL_WINDOWS_STAT_INODES
+      buf->st_dev = 0;
+#  if _GL_WINDOWS_STAT_INODES == 2
+      buf->st_ino._gl_ino[0] = buf->st_ino._gl_ino[1] = 0;
+#  else /* _GL_WINDOWS_STAT_INODES == 1 */
+      buf->st_ino = 0;
+#  endif
+# else
+      /* st_ino is not wide enough for identifying a file on a device.
+         Without st_ino, st_dev is pointless.  */
+      buf->st_dev = 0;
+      buf->st_ino = 0;
+# endif
+
+      /* st_mode.  */
+      unsigned int mode =
+        /* XXX How to handle FILE_ATTRIBUTE_REPARSE_POINT ?  */
+        ((info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ? _S_IFDIR | S_IEXEC_UGO : _S_IFREG)
+        | S_IREAD_UGO
+        | ((info.dwFileAttributes & FILE_ATTRIBUTE_READONLY) ? 0 : S_IWRITE_UGO);
+      if (!(info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
+        {
+          /* Determine whether the file is executable by looking at the file
+             name suffix.  */
+          if (info.nFileSizeHigh > 0 || info.nFileSizeLow > 0)
+            {
+              const char *last_dot = NULL;
+              const char *p;
+              for (p = info.cFileName; *p != '\0'; p++)
+                if (*p == '.')
+                  last_dot = p;
+              if (last_dot != NULL)
+                {
+                  const char *suffix = last_dot + 1;
+                  if (_stricmp (suffix, "exe") == 0
+                      || _stricmp (suffix, "bat") == 0
+                      || _stricmp (suffix, "cmd") == 0
+                      || _stricmp (suffix, "com") == 0)
+                    mode |= S_IEXEC_UGO;
+                }
+            }
+        }
+      buf->st_mode = mode;
+
+      /* st_nlink.  Ignore hard links here.  */
+      buf->st_nlink = 1;
+
+      /* There's no easy way to map the Windows SID concept to an integer.  */
+      buf->st_uid = 0;
+      buf->st_gid = 0;
+
+      /* st_rdev is irrelevant for normal files and directories.  */
+      buf->st_rdev = 0;
+
+      /* st_size.  */
+      if (sizeof (buf->st_size) <= 4)
+        /* Range check already done above.  */
+        buf->st_size = info.nFileSizeLow;
+      else
+        buf->st_size = ((long long) info.nFileSizeHigh << 32) | (long long) info.nFileSizeLow;
+
+      /* st_atime, st_mtime, st_ctime.  */
+# if _GL_WINDOWS_STAT_TIMESPEC
+      buf->st_atim = _gl_convert_FILETIME_to_timespec (&info.ftLastAccessTime);
+      buf->st_mtim = _gl_convert_FILETIME_to_timespec (&info.ftLastWriteTime);
+      buf->st_ctim = _gl_convert_FILETIME_to_timespec (&info.ftCreationTime);
+# else
+      buf->st_atime = _gl_convert_FILETIME_to_POSIX (&info.ftLastAccessTime);
+      buf->st_mtime = _gl_convert_FILETIME_to_POSIX (&info.ftLastWriteTime);
+      buf->st_ctime = _gl_convert_FILETIME_to_POSIX (&info.ftCreationTime);
+# endif
+
+      FindClose (h);
+
+      ret = 0;
+    }
+
+   done:
+    if (ret >= 0 && check_dir && !S_ISDIR (buf->st_mode))
+      {
+        errno = ENOTDIR;
+        ret = -1;
+      }
+    if (malloca_rname != NULL)
+      {
+        int saved_errno = errno;
+        freea (malloca_rname);
+        errno = saved_errno;
+      }
+    return ret;
+  }
+
+ failed:
+  {
+    DWORD error = GetLastError ();
+    #if 0
+    fprintf (stderr, "rpl_stat error 0x%x\n", (unsigned int) error);
+    #endif
+
+    if (malloca_rname != NULL)
+      freea (malloca_rname);
+
+    switch (error)
+      {
+      /* Some of these errors probably cannot happen with the specific flags
+         that we pass to CreateFile.  But who knows...  */
+      case ERROR_FILE_NOT_FOUND: /* The last component of rname does not exist.  */
+      case ERROR_PATH_NOT_FOUND: /* Some directory component in rname does not exist.  */
+      case ERROR_BAD_PATHNAME:   /* rname is such as '\\server'.  */
+      case ERROR_BAD_NET_NAME:   /* rname is such as '\\server\nonexistentshare'.  */
+      case ERROR_INVALID_NAME:   /* rname contains wildcards, misplaced colon, etc.  */
+      case ERROR_DIRECTORY:
+        errno = ENOENT;
+        break;
+
+      case ERROR_ACCESS_DENIED:  /* rname is such as 'C:\System Volume Information\foo'.  */
+      case ERROR_SHARING_VIOLATION: /* rname is such as 'C:\pagefile.sys' (second approach only).  */
+                                    /* XXX map to EACCES or EPERM? */
+        errno = EACCES;
+        break;
+
+      case ERROR_OUTOFMEMORY:
+        errno = ENOMEM;
+        break;
+
+      case ERROR_WRITE_PROTECT:
+        errno = EROFS;
+        break;
+
+      case ERROR_WRITE_FAULT:
+      case ERROR_READ_FAULT:
+      case ERROR_GEN_FAILURE:
+        errno = EIO;
+        break;
+
+      case ERROR_BUFFER_OVERFLOW:
+      case ERROR_FILENAME_EXCED_RANGE:
+        errno = ENAMETOOLONG;
+        break;
+
+      case ERROR_DELETE_PENDING: /* XXX map to EACCES or EPERM? */
+        errno = EPERM;
+        break;
+
+      default:
+        errno = EINVAL;
+        break;
+      }
+
+    return -1;
+  }
+#else
+  int result = orig_stat (name, buf);
+  if (result == 0)
+    {
+# if REPLACE_FUNC_STAT_FILE
+      /* Solaris 9 mistakenly succeeds when given a non-directory with a
+         trailing slash.  */
+      if (!S_ISDIR (buf->st_mode))
+        {
+          size_t len = strlen (name);
+          if (ISSLASH (name[len - 1]))
+            {
+              errno = ENOTDIR;
+              return -1;
+            }
+        }
+# endif /* REPLACE_FUNC_STAT_FILE */
+      result = stat_time_normalize (result, buf);
+    }
+  return result;
+#endif
+}
diff --git a/src/grep/lib/stdalign.in.h b/src/grep/lib/stdalign.in.h
new file mode 100644
index 0000000..592d58e
--- /dev/null
+++ b/src/grep/lib/stdalign.in.h
@@ -0,0 +1,127 @@
+/* A substitute for ISO C11 <stdalign.h>.
+
+   Copyright 2011-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert and Bruno Haible.  */
+
+#ifndef _GL_STDALIGN_H
+#define _GL_STDALIGN_H
+
+/* ISO C11 <stdalign.h> for platforms that lack it.
+
+   References:
+   ISO C11 (latest free draft
+   <http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf>)
+   sections 6.5.3.4, 6.7.5, 7.15.
+   C++11 (latest free draft
+   <http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3242.pdf>)
+   section 18.10. */
+
+/* alignof (TYPE), also known as _Alignof (TYPE), yields the alignment
+   requirement of a structure member (i.e., slot or field) that is of
+   type TYPE, as an integer constant expression.
+
+   This differs from GCC's and clang's __alignof__ operator, which can
+   yield a better-performing alignment for an object of that type.  For
+   example, on x86 with GCC and on Linux/x86 with clang,
+   __alignof__ (double) and __alignof__ (long long) are 8, whereas
+   alignof (double) and alignof (long long) are 4 unless the option
+   '-malign-double' is used.
+
+   The result cannot be used as a value for an 'enum' constant, if you
+   want to be portable to HP-UX 10.20 cc and AIX 3.2.5 xlc.
+
+   Include <stddef.h> for offsetof.  */
+#include <stddef.h>
+
+/* FreeBSD 9.1 <sys/cdefs.h>, included by <stddef.h> and lots of other
+   standard headers, defines conflicting implementations of _Alignas
+   and _Alignof that are no better than ours; override them.  */
+#undef _Alignas
+#undef _Alignof
+
+/* GCC releases before GCC 4.9 had a bug in _Alignof.  See GCC bug 52023
+   <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52023>.
+   clang versions < 8.0.0 have the same bug.  */
+#if (!defined __STDC_VERSION__ || __STDC_VERSION__ < 201112 \
+     || (defined __GNUC__ && __GNUC__ < 4 + (__GNUC_MINOR__ < 9) \
+         && !defined __clang__) \
+     || (defined __clang__ && __clang_major__ < 8))
+# ifdef __cplusplus
+#  if 201103 <= __cplusplus
+#   define _Alignof(type) alignof (type)
+#  else
+   template <class __t> struct __alignof_helper { char __a; __t __b; };
+#   define _Alignof(type) offsetof (__alignof_helper<type>, __b)
+#  endif
+# else
+#  define _Alignof(type) offsetof (struct { char __a; type __b; }, __b)
+# endif
+#endif
+#if ! (defined __cplusplus && 201103 <= __cplusplus)
+# define alignof _Alignof
+#endif
+#define __alignof_is_defined 1
+
+/* alignas (A), also known as _Alignas (A), aligns a variable or type
+   to the alignment A, where A is an integer constant expression.  For
+   example:
+
+      int alignas (8) foo;
+      struct s { int a; int alignas (8) bar; };
+
+   aligns the address of FOO and the offset of BAR to be multiples of 8.
+
+   A should be a power of two that is at least the type's alignment
+   and at most the implementation's alignment limit.  This limit is
+   2**28 on typical GNUish hosts, and 2**13 on MSVC.  To be portable
+   to MSVC through at least version 10.0, A should be an integer
+   constant, as MSVC does not support expressions such as 1 << 3.
+   To be portable to Sun C 5.11, do not align auto variables to
+   anything stricter than their default alignment.
+
+   The following C11 requirements are not supported here:
+
+     - If A is zero, alignas has no effect.
+     - alignas can be used multiple times; the strictest one wins.
+     - alignas (TYPE) is equivalent to alignas (alignof (TYPE)).
+
+   */
+
+#if !defined __STDC_VERSION__ || __STDC_VERSION__ < 201112
+# if defined __cplusplus && 201103 <= __cplusplus
+#  define _Alignas(a) alignas (a)
+# elif (!defined __attribute__ \
+        && ((defined __APPLE__ && defined __MACH__ \
+             ? 4 < __GNUC__ + (1 <= __GNUC_MINOR__) \
+             : __GNUC__ && !defined __ibmxl__) \
+            || (4 <= __clang_major__) \
+            || (__ia64 && (61200 <= __HP_cc || 61200 <= __HP_aCC)) \
+            || __ICC || 0x590 <= __SUNPRO_C || 0x0600 <= __xlC__))
+#  define _Alignas(a) __attribute__ ((__aligned__ (a)))
+# elif 1300 <= _MSC_VER
+#  define _Alignas(a) __declspec (align (a))
+# endif
+#endif
+#if ((defined _Alignas && ! (defined __cplusplus && 201103 <= __cplusplus)) \
+     || (defined __STDC_VERSION__ && 201112 <= __STDC_VERSION__))
+# define alignas _Alignas
+#endif
+#if defined alignas || (defined __cplusplus && 201103 <= __cplusplus)
+# define __alignas_is_defined 1
+#endif
+
+#endif /* _GL_STDALIGN_H */
diff --git a/src/grep/lib/stdarg.in.h b/src/grep/lib/stdarg.in.h
new file mode 100644
index 0000000..9269da2
--- /dev/null
+++ b/src/grep/lib/stdarg.in.h
@@ -0,0 +1,35 @@
+/* Substitute for and wrapper around <stdarg.h>.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _@GUARD_PREFIX@_STDARG_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard.  */
+#@INCLUDE_NEXT@ @NEXT_STDARG_H@
+
+#ifndef _@GUARD_PREFIX@_STDARG_H
+#define _@GUARD_PREFIX@_STDARG_H
+
+#ifndef va_copy
+# define va_copy(a,b) ((a) = (b))
+#endif
+
+#endif /* _@GUARD_PREFIX@_STDARG_H */
+#endif /* _@GUARD_PREFIX@_STDARG_H */
diff --git a/src/grep/lib/stdbool.in.h b/src/grep/lib/stdbool.in.h
new file mode 100644
index 0000000..2a1992d
--- /dev/null
+++ b/src/grep/lib/stdbool.in.h
@@ -0,0 +1,132 @@
+/* Copyright (C) 2001-2003, 2006-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <haible@clisp.cons.org>, 2001.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GL_STDBOOL_H
+#define _GL_STDBOOL_H
+
+/* ISO C 99 <stdbool.h> for platforms that lack it.  */
+
+/* Usage suggestions:
+
+   Programs that use <stdbool.h> should be aware of some limitations
+   and standards compliance issues.
+
+   Standards compliance:
+
+       - <stdbool.h> must be #included before 'bool', 'false', 'true'
+         can be used.
+
+       - You cannot assume that sizeof (bool) == 1.
+
+       - Programs should not undefine the macros bool, true, and false,
+         as C99 lists that as an "obsolescent feature".
+
+   Limitations of this substitute, when used in a C89 environment:
+
+       - <stdbool.h> must be #included before the '_Bool' type can be used.
+
+       - You cannot assume that _Bool is a typedef; it might be a macro.
+
+       - Bit-fields of type 'bool' are not supported.  Portable code
+         should use 'unsigned int foo : 1;' rather than 'bool foo : 1;'.
+
+       - In C99, casts and automatic conversions to '_Bool' or 'bool' are
+         performed in such a way that every nonzero value gets converted
+         to 'true', and zero gets converted to 'false'.  This doesn't work
+         with this substitute.  With this substitute, only the values 0 and 1
+         give the expected result when converted to _Bool' or 'bool'.
+
+       - C99 allows the use of (_Bool)0.0 in constant expressions, but
+         this substitute cannot always provide this property.
+
+   Also, it is suggested that programs use 'bool' rather than '_Bool';
+   this isn't required, but 'bool' is more common.  */
+
+
+/* 7.16. Boolean type and values */
+
+/* BeOS <sys/socket.h> already #defines false 0, true 1.  We use the same
+   definitions below, but temporarily we have to #undef them.  */
+#if defined __BEOS__ && !defined __HAIKU__
+# include <OS.h> /* defines bool but not _Bool */
+# undef false
+# undef true
+#endif
+
+#ifdef __cplusplus
+# define _Bool bool
+# define bool bool
+#else
+# if defined __BEOS__ && !defined __HAIKU__
+  /* A compiler known to have 'bool'.  */
+  /* If the compiler already has both 'bool' and '_Bool', we can assume they
+     are the same types.  */
+#  if !@HAVE__BOOL@
+typedef bool _Bool;
+#  endif
+# else
+#  if !defined __GNUC__
+   /* If @HAVE__BOOL@:
+        Some HP-UX cc and AIX IBM C compiler versions have compiler bugs when
+        the built-in _Bool type is used.  See
+          https://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
+          https://lists.gnu.org/r/bug-coreutils/2005-11/msg00161.html
+          https://lists.gnu.org/r/bug-coreutils/2005-10/msg00086.html
+        Similar bugs are likely with other compilers as well; this file
+        wouldn't be used if <stdbool.h> was working.
+        So we override the _Bool type.
+      If !@HAVE__BOOL@:
+        Need to define _Bool ourselves. As 'signed char' or as an enum type?
+        Use of a typedef, with SunPRO C, leads to a stupid
+          "warning: _Bool is a keyword in ISO C99".
+        Use of an enum type, with IRIX cc, leads to a stupid
+          "warning(1185): enumerated type mixed with another type".
+        Even the existence of an enum type, without a typedef,
+          "Invalid enumerator. (badenum)" with HP-UX cc on Tru64.
+        The only benefit of the enum, debuggability, is not important
+        with these compilers.  So use 'signed char' and no enum.  */
+#   define _Bool signed char
+#  else
+   /* With this compiler, trust the _Bool type if the compiler has it.  */
+#   if !@HAVE__BOOL@
+   /* For the sake of symbolic names in gdb, define true and false as
+      enum constants, not only as macros.
+      It is tempting to write
+         typedef enum { false = 0, true = 1 } _Bool;
+      so that gdb prints values of type 'bool' symbolically.  But then
+      values of type '_Bool' might promote to 'int' or 'unsigned int'
+      (see ISO C 99 6.7.2.2.(4)); however, '_Bool' must promote to 'int'
+      (see ISO C 99 6.3.1.1.(2)).  So add a negative value to the
+      enum; this ensures that '_Bool' promotes to 'int'.  */
+typedef enum { _Bool_must_promote_to_int = -1, false = 0, true = 1 } _Bool;
+#   endif
+#  endif
+# endif
+# define bool _Bool
+#endif
+
+/* The other macros must be usable in preprocessor directives.  */
+#ifdef __cplusplus
+# define false false
+# define true true
+#else
+# define false 0
+# define true 1
+#endif
+
+#define __bool_true_false_are_defined 1
+
+#endif /* _GL_STDBOOL_H */
diff --git a/src/grep/lib/stddef.in.h b/src/grep/lib/stddef.in.h
new file mode 100644
index 0000000..42290d4
--- /dev/null
+++ b/src/grep/lib/stddef.in.h
@@ -0,0 +1,147 @@
+/* A substitute for POSIX 2008 <stddef.h>, for platforms that have issues.
+
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake.  */
+
+/*
+ * POSIX 2008 <stddef.h> for platforms that have issues.
+ * <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/stddef.h.html>
+ */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if defined __need_wchar_t || defined __need_size_t  \
+  || defined __need_ptrdiff_t || defined __need_NULL \
+  || defined __need_wint_t
+/* Special invocation convention inside gcc header files.  In
+   particular, gcc provides a version of <stddef.h> that blindly
+   redefines NULL even when __need_wint_t was defined, even though
+   wint_t is not normally provided by <stddef.h>.  Hence, we must
+   remember if special invocation has ever been used to obtain wint_t,
+   in which case we need to clean up NULL yet again.  */
+
+# if !(defined _@GUARD_PREFIX@_STDDEF_H && defined _GL_STDDEF_WINT_T)
+#  ifdef __need_wint_t
+#   define _GL_STDDEF_WINT_T
+#  endif
+#  @INCLUDE_NEXT@ @NEXT_STDDEF_H@
+   /* On TinyCC, make sure that the macros that indicate the special invocation
+      convention get undefined.  */
+#  undef __need_wchar_t
+#  undef __need_size_t
+#  undef __need_ptrdiff_t
+#  undef __need_NULL
+#  undef __need_wint_t
+# endif
+
+#else
+/* Normal invocation convention.  */
+
+# ifndef _@GUARD_PREFIX@_STDDEF_H
+
+/* On AIX 7.2, with xlc in 64-bit mode, <stddef.h> defines max_align_t to a
+   type with alignment 4, but 'long' has alignment 8.  */
+#  if defined _AIX && defined __LP64__
+#   if !GNULIB_defined_max_align_t
+#    ifdef _MAX_ALIGN_T
+/* /usr/include/stddef.h has already defined max_align_t.  Override it.  */
+typedef long rpl_max_align_t;
+#     define max_align_t rpl_max_align_t
+#    else
+/* Prevent /usr/include/stddef.h from defining max_align_t.  */
+typedef long max_align_t;
+#     define _MAX_ALIGN_T
+#    endif
+#    define GNULIB_defined_max_align_t 1
+#   endif
+#  endif
+
+/* The include_next requires a split double-inclusion guard.  */
+
+#  @INCLUDE_NEXT@ @NEXT_STDDEF_H@
+
+/* On NetBSD 5.0, the definition of NULL lacks proper parentheses.  */
+#  if (@REPLACE_NULL@ \
+       && (!defined _@GUARD_PREFIX@_STDDEF_H || defined _GL_STDDEF_WINT_T))
+#   undef NULL
+#   ifdef __cplusplus
+   /* ISO C++ says that the macro NULL must expand to an integer constant
+      expression, hence '((void *) 0)' is not allowed in C++.  */
+#    if __GNUG__ >= 3
+    /* GNU C++ has a __null macro that behaves like an integer ('int' or
+       'long') but has the same size as a pointer.  Use that, to avoid
+       warnings.  */
+#     define NULL __null
+#    else
+#     define NULL 0L
+#    endif
+#   else
+#    define NULL ((void *) 0)
+#   endif
+#  endif
+
+#  ifndef _@GUARD_PREFIX@_STDDEF_H
+#   define _@GUARD_PREFIX@_STDDEF_H
+
+/* Some platforms lack wchar_t.  */
+#if !@HAVE_WCHAR_T@
+# define wchar_t int
+#endif
+
+/* Some platforms lack max_align_t.  The check for _GCC_MAX_ALIGN_T is
+   a hack in case the configure-time test was done with g++ even though
+   we are currently compiling with gcc.
+   On MSVC, max_align_t is defined only in C++ mode, after <cstddef> was
+   included.  Its definition is good since it has an alignment of 8 (on x86
+   and x86_64).
+   Similarly on OS/2 kLIBC.  */
+#if (defined _MSC_VER || (defined __KLIBC__ && !defined __LIBCN__)) \
+    && defined __cplusplus
+# include <cstddef>
+#else
+# if ! (@HAVE_MAX_ALIGN_T@ || (defined _GCC_MAX_ALIGN_T && !defined __clang__))
+#  if !GNULIB_defined_max_align_t
+/* On the x86, the maximum storage alignment of double, long, etc. is 4,
+   but GCC's C11 ABI for x86 says that max_align_t has an alignment of 8,
+   and the C11 standard allows this.  Work around this problem by
+   using __alignof__ (which returns 8 for double) rather than _Alignof
+   (which returns 4), and align each union member accordingly.  */
+#   if defined __GNUC__ || (__clang_major__ >= 4)
+#    define _GL_STDDEF_ALIGNAS(type) \
+       __attribute__ ((__aligned__ (__alignof__ (type))))
+#   else
+#    define _GL_STDDEF_ALIGNAS(type) /* */
+#   endif
+typedef union
+{
+  char *__p _GL_STDDEF_ALIGNAS (char *);
+  double __d _GL_STDDEF_ALIGNAS (double);
+  long double __ld _GL_STDDEF_ALIGNAS (long double);
+  long int __i _GL_STDDEF_ALIGNAS (long int);
+} rpl_max_align_t;
+#   define max_align_t rpl_max_align_t
+#   define GNULIB_defined_max_align_t 1
+#  endif
+# endif
+#endif
+
+#  endif /* _@GUARD_PREFIX@_STDDEF_H */
+# endif /* _@GUARD_PREFIX@_STDDEF_H */
+#endif /* __need_XXX */
diff --git a/src/grep/lib/stdint.in.h b/src/grep/lib/stdint.in.h
new file mode 100644
index 0000000..85c5418
--- /dev/null
+++ b/src/grep/lib/stdint.in.h
@@ -0,0 +1,740 @@
+/* Copyright (C) 2001-2002, 2004-2021 Free Software Foundation, Inc.
+   Written by Paul Eggert, Bruno Haible, Sam Steingold, Peter Burwood.
+   This file is part of gnulib.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/*
+ * ISO C 99 <stdint.h> for platforms that lack it.
+ * <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/stdint.h.html>
+ */
+
+#ifndef _@GUARD_PREFIX@_STDINT_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* When including a system file that in turn includes <inttypes.h>,
+   use the system <inttypes.h>, not our substitute.  This avoids
+   problems with (for example) VMS, whose <sys/bitypes.h> includes
+   <inttypes.h>.  */
+#define _GL_JUST_INCLUDE_SYSTEM_INTTYPES_H
+
+/* On Android (Bionic libc), <sys/types.h> includes this file before
+   having defined 'time_t'.  Therefore in this case avoid including
+   other system header files; just include the system's <stdint.h>.
+   Ideally we should test __BIONIC__ here, but it is only defined after
+   <sys/cdefs.h> has been included; hence test __ANDROID__ instead.  */
+#if defined __ANDROID__ && defined _GL_INCLUDING_SYS_TYPES_H
+# @INCLUDE_NEXT@ @NEXT_STDINT_H@
+#else
+
+/* Get those types that are already defined in other system include
+   files, so that we can "#define int8_t signed char" below without
+   worrying about a later system include file containing a "typedef
+   signed char int8_t;" that will get messed up by our macro.  Our
+   macros should all be consistent with the system versions, except
+   for the "fast" types and macros, which we recommend against using
+   in public interfaces due to compiler differences.  */
+
+#if @HAVE_STDINT_H@
+# if defined __sgi && ! defined __c99
+   /* Bypass IRIX's <stdint.h> if in C89 mode, since it merely annoys users
+      with "This header file is to be used only for c99 mode compilations"
+      diagnostics.  */
+#  define __STDINT_H__
+# endif
+
+  /* Some pre-C++11 <stdint.h> implementations need this.  */
+# ifdef __cplusplus
+#  ifndef __STDC_CONSTANT_MACROS
+#   define __STDC_CONSTANT_MACROS 1
+#  endif
+#  ifndef __STDC_LIMIT_MACROS
+#   define __STDC_LIMIT_MACROS 1
+#  endif
+# endif
+
+  /* Other systems may have an incomplete or buggy <stdint.h>.
+     Include it before <inttypes.h>, since any "#include <stdint.h>"
+     in <inttypes.h> would reinclude us, skipping our contents because
+     _@GUARD_PREFIX@_STDINT_H is defined.
+     The include_next requires a split double-inclusion guard.  */
+# @INCLUDE_NEXT@ @NEXT_STDINT_H@
+#endif
+
+#if ! defined _@GUARD_PREFIX@_STDINT_H && ! defined _GL_JUST_INCLUDE_SYSTEM_STDINT_H
+#define _@GUARD_PREFIX@_STDINT_H
+
+/* Get SCHAR_MIN, SCHAR_MAX, UCHAR_MAX, INT_MIN, INT_MAX,
+   LONG_MIN, LONG_MAX, ULONG_MAX, _GL_INTEGER_WIDTH.  */
+#include <limits.h>
+
+/* Override WINT_MIN and WINT_MAX if gnulib's <wchar.h> or <wctype.h> overrides
+   wint_t.  */
+#if @GNULIBHEADERS_OVERRIDE_WINT_T@
+# undef WINT_MIN
+# undef WINT_MAX
+# define WINT_MIN 0x0U
+# define WINT_MAX 0xffffffffU
+#endif
+
+#if ! @HAVE_C99_STDINT_H@
+
+/* <sys/types.h> defines some of the stdint.h types as well, on glibc,
+   IRIX 6.5, and OpenBSD 3.8 (via <machine/types.h>).
+   AIX 5.2 <sys/types.h> isn't needed and causes troubles.
+   Mac OS X 10.4.6 <sys/types.h> includes <stdint.h> (which is us), but
+   relies on the system <stdint.h> definitions, so include
+   <sys/types.h> after @NEXT_STDINT_H@.  */
+# if @HAVE_SYS_TYPES_H@ && ! defined _AIX
+#  include <sys/types.h>
+# endif
+
+# if @HAVE_INTTYPES_H@
+  /* In OpenBSD 3.8, <inttypes.h> includes <machine/types.h>, which defines
+     int{8,16,32,64}_t, uint{8,16,32,64}_t and __BIT_TYPES_DEFINED__.
+     <inttypes.h> also defines intptr_t and uintptr_t.  */
+#  include <inttypes.h>
+# elif @HAVE_SYS_INTTYPES_H@
+  /* Solaris 7 <sys/inttypes.h> has the types except the *_fast*_t types, and
+     the macros except for *_FAST*_*, INTPTR_MIN, PTRDIFF_MIN, PTRDIFF_MAX.  */
+#  include <sys/inttypes.h>
+# endif
+
+# if @HAVE_SYS_BITYPES_H@ && ! defined __BIT_TYPES_DEFINED__
+  /* Linux libc4 >= 4.6.7 and libc5 have a <sys/bitypes.h> that defines
+     int{8,16,32,64}_t and __BIT_TYPES_DEFINED__.  In libc5 >= 5.2.2 it is
+     included by <sys/types.h>.  */
+#  include <sys/bitypes.h>
+# endif
+
+# undef _GL_JUST_INCLUDE_SYSTEM_INTTYPES_H
+
+/* Minimum and maximum values for an integer type under the usual assumption.
+   Return an unspecified value if BITS == 0, adding a check to pacify
+   picky compilers.  */
+
+/* These are separate macros, because if you try to merge these macros into
+   a single one, HP-UX cc rejects the resulting expression in constant
+   expressions.  */
+# define _STDINT_UNSIGNED_MIN(bits, zero) \
+    (zero)
+# define _STDINT_SIGNED_MIN(bits, zero) \
+    (~ _STDINT_MAX (1, bits, zero))
+
+# define _STDINT_MAX(signed, bits, zero) \
+    (((((zero) + 1) << ((bits) ? (bits) - 1 - (signed) : 0)) - 1) * 2 + 1)
+
+#if !GNULIB_defined_stdint_types
+
+/* 7.18.1.1. Exact-width integer types */
+
+/* Here we assume a standard architecture where the hardware integer
+   types have 8, 16, 32, optionally 64 bits.  */
+
+# undef int8_t
+# undef uint8_t
+typedef signed char gl_int8_t;
+typedef unsigned char gl_uint8_t;
+# define int8_t gl_int8_t
+# define uint8_t gl_uint8_t
+
+# undef int16_t
+# undef uint16_t
+typedef short int gl_int16_t;
+typedef unsigned short int gl_uint16_t;
+# define int16_t gl_int16_t
+# define uint16_t gl_uint16_t
+
+# undef int32_t
+# undef uint32_t
+typedef int gl_int32_t;
+typedef unsigned int gl_uint32_t;
+# define int32_t gl_int32_t
+# define uint32_t gl_uint32_t
+
+/* If the system defines INT64_MAX, assume int64_t works.  That way,
+   if the underlying platform defines int64_t to be a 64-bit long long
+   int, the code below won't mistakenly define it to be a 64-bit long
+   int, which would mess up C++ name mangling.  We must use #ifdef
+   rather than #if, to avoid an error with HP-UX 10.20 cc.  */
+
+# ifdef INT64_MAX
+#  define GL_INT64_T
+# else
+/* Do not undefine int64_t if gnulib is not being used with 64-bit
+   types, since otherwise it breaks platforms like Tandem/NSK.  */
+#  if LONG_MAX >> 31 >> 31 == 1
+#   undef int64_t
+typedef long int gl_int64_t;
+#   define int64_t gl_int64_t
+#   define GL_INT64_T
+#  elif defined _MSC_VER
+#   undef int64_t
+typedef __int64 gl_int64_t;
+#   define int64_t gl_int64_t
+#   define GL_INT64_T
+#  else
+#   undef int64_t
+typedef long long int gl_int64_t;
+#   define int64_t gl_int64_t
+#   define GL_INT64_T
+#  endif
+# endif
+
+# ifdef UINT64_MAX
+#  define GL_UINT64_T
+# else
+#  if ULONG_MAX >> 31 >> 31 >> 1 == 1
+#   undef uint64_t
+typedef unsigned long int gl_uint64_t;
+#   define uint64_t gl_uint64_t
+#   define GL_UINT64_T
+#  elif defined _MSC_VER
+#   undef uint64_t
+typedef unsigned __int64 gl_uint64_t;
+#   define uint64_t gl_uint64_t
+#   define GL_UINT64_T
+#  else
+#   undef uint64_t
+typedef unsigned long long int gl_uint64_t;
+#   define uint64_t gl_uint64_t
+#   define GL_UINT64_T
+#  endif
+# endif
+
+/* Avoid collision with Solaris 2.5.1 <pthread.h> etc.  */
+# define _UINT8_T
+# define _UINT32_T
+# define _UINT64_T
+
+
+/* 7.18.1.2. Minimum-width integer types */
+
+/* Here we assume a standard architecture where the hardware integer
+   types have 8, 16, 32, optionally 64 bits. Therefore the leastN_t types
+   are the same as the corresponding N_t types.  */
+
+# undef int_least8_t
+# undef uint_least8_t
+# undef int_least16_t
+# undef uint_least16_t
+# undef int_least32_t
+# undef uint_least32_t
+# undef int_least64_t
+# undef uint_least64_t
+# define int_least8_t int8_t
+# define uint_least8_t uint8_t
+# define int_least16_t int16_t
+# define uint_least16_t uint16_t
+# define int_least32_t int32_t
+# define uint_least32_t uint32_t
+# ifdef GL_INT64_T
+#  define int_least64_t int64_t
+# endif
+# ifdef GL_UINT64_T
+#  define uint_least64_t uint64_t
+# endif
+
+/* 7.18.1.3. Fastest minimum-width integer types */
+
+/* Note: Other <stdint.h> substitutes may define these types differently.
+   It is not recommended to use these types in public header files. */
+
+/* Here we assume a standard architecture where the hardware integer
+   types have 8, 16, 32, optionally 64 bits. Therefore the fastN_t types
+   are taken from the same list of types.  The following code normally
+   uses types consistent with glibc, as that lessens the chance of
+   incompatibility with older GNU hosts.  */
+
+# undef int_fast8_t
+# undef uint_fast8_t
+# undef int_fast16_t
+# undef uint_fast16_t
+# undef int_fast32_t
+# undef uint_fast32_t
+# undef int_fast64_t
+# undef uint_fast64_t
+typedef signed char gl_int_fast8_t;
+typedef unsigned char gl_uint_fast8_t;
+
+# ifdef __sun
+/* Define types compatible with SunOS 5.10, so that code compiled under
+   earlier SunOS versions works with code compiled under SunOS 5.10.  */
+typedef int gl_int_fast32_t;
+typedef unsigned int gl_uint_fast32_t;
+# else
+typedef long int gl_int_fast32_t;
+typedef unsigned long int gl_uint_fast32_t;
+# endif
+typedef gl_int_fast32_t gl_int_fast16_t;
+typedef gl_uint_fast32_t gl_uint_fast16_t;
+
+# define int_fast8_t gl_int_fast8_t
+# define uint_fast8_t gl_uint_fast8_t
+# define int_fast16_t gl_int_fast16_t
+# define uint_fast16_t gl_uint_fast16_t
+# define int_fast32_t gl_int_fast32_t
+# define uint_fast32_t gl_uint_fast32_t
+# ifdef GL_INT64_T
+#  define int_fast64_t int64_t
+# endif
+# ifdef GL_UINT64_T
+#  define uint_fast64_t uint64_t
+# endif
+
+/* 7.18.1.4. Integer types capable of holding object pointers */
+
+/* kLIBC's <stdint.h> defines _INTPTR_T_DECLARED and needs its own
+   definitions of intptr_t and uintptr_t (which use int and unsigned)
+   to avoid clashes with declarations of system functions like sbrk.
+   Similarly, MinGW WSL-5.4.1 <stdint.h> needs its own intptr_t and
+   uintptr_t to avoid conflicting declarations of system functions like
+   _findclose in <io.h>.  */
+# if !((defined __KLIBC__ && defined _INTPTR_T_DECLARED) \
+       || defined __MINGW32__)
+#  undef intptr_t
+#  undef uintptr_t
+#  ifdef _WIN64
+typedef long long int gl_intptr_t;
+typedef unsigned long long int gl_uintptr_t;
+#  else
+typedef long int gl_intptr_t;
+typedef unsigned long int gl_uintptr_t;
+#  endif
+#  define intptr_t gl_intptr_t
+#  define uintptr_t gl_uintptr_t
+# endif
+
+/* 7.18.1.5. Greatest-width integer types */
+
+/* Note: These types are compiler dependent. It may be unwise to use them in
+   public header files. */
+
+/* If the system defines INTMAX_MAX, assume that intmax_t works, and
+   similarly for UINTMAX_MAX and uintmax_t.  This avoids problems with
+   assuming one type where another is used by the system.  */
+
+# ifndef INTMAX_MAX
+#  undef INTMAX_C
+#  undef intmax_t
+#  if LONG_MAX >> 30 == 1
+typedef long long int gl_intmax_t;
+#   define intmax_t gl_intmax_t
+#  elif defined GL_INT64_T
+#   define intmax_t int64_t
+#  else
+typedef long int gl_intmax_t;
+#   define intmax_t gl_intmax_t
+#  endif
+# endif
+
+# ifndef UINTMAX_MAX
+#  undef UINTMAX_C
+#  undef uintmax_t
+#  if ULONG_MAX >> 31 == 1
+typedef unsigned long long int gl_uintmax_t;
+#   define uintmax_t gl_uintmax_t
+#  elif defined GL_UINT64_T
+#   define uintmax_t uint64_t
+#  else
+typedef unsigned long int gl_uintmax_t;
+#   define uintmax_t gl_uintmax_t
+#  endif
+# endif
+
+/* Verify that intmax_t and uintmax_t have the same size.  Too much code
+   breaks if this is not the case.  If this check fails, the reason is likely
+   to be found in the autoconf macros.  */
+typedef int _verify_intmax_size[sizeof (intmax_t) == sizeof (uintmax_t)
+                                ? 1 : -1];
+
+# define GNULIB_defined_stdint_types 1
+# endif /* !GNULIB_defined_stdint_types */
+
+/* 7.18.2. Limits of specified-width integer types */
+
+/* 7.18.2.1. Limits of exact-width integer types */
+
+/* Here we assume a standard architecture where the hardware integer
+   types have 8, 16, 32, optionally 64 bits.  */
+
+# undef INT8_MIN
+# undef INT8_MAX
+# undef UINT8_MAX
+# define INT8_MIN  (~ INT8_MAX)
+# define INT8_MAX  127
+# define UINT8_MAX  255
+
+# undef INT16_MIN
+# undef INT16_MAX
+# undef UINT16_MAX
+# define INT16_MIN  (~ INT16_MAX)
+# define INT16_MAX  32767
+# define UINT16_MAX  65535
+
+# undef INT32_MIN
+# undef INT32_MAX
+# undef UINT32_MAX
+# define INT32_MIN  (~ INT32_MAX)
+# define INT32_MAX  2147483647
+# define UINT32_MAX  4294967295U
+
+# if defined GL_INT64_T && ! defined INT64_MAX
+/* Prefer (- INTMAX_C (1) << 63) over (~ INT64_MAX) because SunPRO C 5.0
+   evaluates the latter incorrectly in preprocessor expressions.  */
+#  define INT64_MIN  (- INTMAX_C (1) << 63)
+#  define INT64_MAX  INTMAX_C (9223372036854775807)
+# endif
+
+# if defined GL_UINT64_T && ! defined UINT64_MAX
+#  define UINT64_MAX  UINTMAX_C (18446744073709551615)
+# endif
+
+/* 7.18.2.2. Limits of minimum-width integer types */
+
+/* Here we assume a standard architecture where the hardware integer
+   types have 8, 16, 32, optionally 64 bits. Therefore the leastN_t types
+   are the same as the corresponding N_t types.  */
+
+# undef INT_LEAST8_MIN
+# undef INT_LEAST8_MAX
+# undef UINT_LEAST8_MAX
+# define INT_LEAST8_MIN  INT8_MIN
+# define INT_LEAST8_MAX  INT8_MAX
+# define UINT_LEAST8_MAX  UINT8_MAX
+
+# undef INT_LEAST16_MIN
+# undef INT_LEAST16_MAX
+# undef UINT_LEAST16_MAX
+# define INT_LEAST16_MIN  INT16_MIN
+# define INT_LEAST16_MAX  INT16_MAX
+# define UINT_LEAST16_MAX  UINT16_MAX
+
+# undef INT_LEAST32_MIN
+# undef INT_LEAST32_MAX
+# undef UINT_LEAST32_MAX
+# define INT_LEAST32_MIN  INT32_MIN
+# define INT_LEAST32_MAX  INT32_MAX
+# define UINT_LEAST32_MAX  UINT32_MAX
+
+# undef INT_LEAST64_MIN
+# undef INT_LEAST64_MAX
+# ifdef GL_INT64_T
+#  define INT_LEAST64_MIN  INT64_MIN
+#  define INT_LEAST64_MAX  INT64_MAX
+# endif
+
+# undef UINT_LEAST64_MAX
+# ifdef GL_UINT64_T
+#  define UINT_LEAST64_MAX  UINT64_MAX
+# endif
+
+/* 7.18.2.3. Limits of fastest minimum-width integer types */
+
+/* Here we assume a standard architecture where the hardware integer
+   types have 8, 16, 32, optionally 64 bits. Therefore the fastN_t types
+   are taken from the same list of types.  */
+
+# undef INT_FAST8_MIN
+# undef INT_FAST8_MAX
+# undef UINT_FAST8_MAX
+# define INT_FAST8_MIN  SCHAR_MIN
+# define INT_FAST8_MAX  SCHAR_MAX
+# define UINT_FAST8_MAX  UCHAR_MAX
+
+# undef INT_FAST16_MIN
+# undef INT_FAST16_MAX
+# undef UINT_FAST16_MAX
+# define INT_FAST16_MIN  INT_FAST32_MIN
+# define INT_FAST16_MAX  INT_FAST32_MAX
+# define UINT_FAST16_MAX  UINT_FAST32_MAX
+
+# undef INT_FAST32_MIN
+# undef INT_FAST32_MAX
+# undef UINT_FAST32_MAX
+# ifdef __sun
+#  define INT_FAST32_MIN  INT_MIN
+#  define INT_FAST32_MAX  INT_MAX
+#  define UINT_FAST32_MAX  UINT_MAX
+# else
+#  define INT_FAST32_MIN  LONG_MIN
+#  define INT_FAST32_MAX  LONG_MAX
+#  define UINT_FAST32_MAX  ULONG_MAX
+# endif
+
+# undef INT_FAST64_MIN
+# undef INT_FAST64_MAX
+# ifdef GL_INT64_T
+#  define INT_FAST64_MIN  INT64_MIN
+#  define INT_FAST64_MAX  INT64_MAX
+# endif
+
+# undef UINT_FAST64_MAX
+# ifdef GL_UINT64_T
+#  define UINT_FAST64_MAX  UINT64_MAX
+# endif
+
+/* 7.18.2.4. Limits of integer types capable of holding object pointers */
+
+# undef INTPTR_MIN
+# undef INTPTR_MAX
+# undef UINTPTR_MAX
+# ifdef _WIN64
+#  define INTPTR_MIN  LLONG_MIN
+#  define INTPTR_MAX  LLONG_MAX
+#  define UINTPTR_MAX  ULLONG_MAX
+# else
+#  define INTPTR_MIN  LONG_MIN
+#  define INTPTR_MAX  LONG_MAX
+#  define UINTPTR_MAX  ULONG_MAX
+# endif
+
+/* 7.18.2.5. Limits of greatest-width integer types */
+
+# ifndef INTMAX_MAX
+#  undef INTMAX_MIN
+#  ifdef INT64_MAX
+#   define INTMAX_MIN  INT64_MIN
+#   define INTMAX_MAX  INT64_MAX
+#  else
+#   define INTMAX_MIN  INT32_MIN
+#   define INTMAX_MAX  INT32_MAX
+#  endif
+# endif
+
+# ifndef UINTMAX_MAX
+#  ifdef UINT64_MAX
+#   define UINTMAX_MAX  UINT64_MAX
+#  else
+#   define UINTMAX_MAX  UINT32_MAX
+#  endif
+# endif
+
+/* 7.18.3. Limits of other integer types */
+
+/* ptrdiff_t limits */
+# undef PTRDIFF_MIN
+# undef PTRDIFF_MAX
+# if @APPLE_UNIVERSAL_BUILD@
+#  ifdef _LP64
+#   define PTRDIFF_MIN  _STDINT_SIGNED_MIN (64, 0l)
+#   define PTRDIFF_MAX  _STDINT_MAX (1, 64, 0l)
+#  else
+#   define PTRDIFF_MIN  _STDINT_SIGNED_MIN (32, 0)
+#   define PTRDIFF_MAX  _STDINT_MAX (1, 32, 0)
+#  endif
+# else
+#  define PTRDIFF_MIN  \
+    _STDINT_SIGNED_MIN (@BITSIZEOF_PTRDIFF_T@, 0@PTRDIFF_T_SUFFIX@)
+#  define PTRDIFF_MAX  \
+    _STDINT_MAX (1, @BITSIZEOF_PTRDIFF_T@, 0@PTRDIFF_T_SUFFIX@)
+# endif
+
+/* sig_atomic_t limits */
+# undef SIG_ATOMIC_MIN
+# undef SIG_ATOMIC_MAX
+# if @HAVE_SIGNED_SIG_ATOMIC_T@
+#  define SIG_ATOMIC_MIN  \
+    _STDINT_SIGNED_MIN (@BITSIZEOF_SIG_ATOMIC_T@, 0@SIG_ATOMIC_T_SUFFIX@)
+# else
+#  define SIG_ATOMIC_MIN  \
+    _STDINT_UNSIGNED_MIN (@BITSIZEOF_SIG_ATOMIC_T@, 0@SIG_ATOMIC_T_SUFFIX@)
+# endif
+# define SIG_ATOMIC_MAX  \
+   _STDINT_MAX (@HAVE_SIGNED_SIG_ATOMIC_T@, @BITSIZEOF_SIG_ATOMIC_T@, \
+                0@SIG_ATOMIC_T_SUFFIX@)
+
+
+/* size_t limit */
+# undef SIZE_MAX
+# if @APPLE_UNIVERSAL_BUILD@
+#  ifdef _LP64
+#   define SIZE_MAX  _STDINT_MAX (0, 64, 0ul)
+#  else
+#   define SIZE_MAX  _STDINT_MAX (0, 32, 0ul)
+#  endif
+# else
+#  define SIZE_MAX  _STDINT_MAX (0, @BITSIZEOF_SIZE_T@, 0@SIZE_T_SUFFIX@)
+# endif
+
+/* wchar_t limits */
+/* Get WCHAR_MIN, WCHAR_MAX.
+   This include is not on the top, above, because on OSF/1 4.0 we have a
+   sequence of nested includes
+   <wchar.h> -> <stdio.h> -> <getopt.h> -> <stdlib.h>, and the latter includes
+   <stdint.h> and assumes its types are already defined.  */
+# if @HAVE_WCHAR_H@ && ! (defined WCHAR_MIN && defined WCHAR_MAX)
+#  define _GL_JUST_INCLUDE_SYSTEM_WCHAR_H
+#  include <wchar.h>
+#  undef _GL_JUST_INCLUDE_SYSTEM_WCHAR_H
+# endif
+# undef WCHAR_MIN
+# undef WCHAR_MAX
+# if @HAVE_SIGNED_WCHAR_T@
+#  define WCHAR_MIN  \
+    _STDINT_SIGNED_MIN (@BITSIZEOF_WCHAR_T@, 0@WCHAR_T_SUFFIX@)
+# else
+#  define WCHAR_MIN  \
+    _STDINT_UNSIGNED_MIN (@BITSIZEOF_WCHAR_T@, 0@WCHAR_T_SUFFIX@)
+# endif
+# define WCHAR_MAX  \
+   _STDINT_MAX (@HAVE_SIGNED_WCHAR_T@, @BITSIZEOF_WCHAR_T@, 0@WCHAR_T_SUFFIX@)
+
+/* wint_t limits */
+/* If gnulib's <wchar.h> or <wctype.h> overrides wint_t, @WINT_T_SUFFIX@ is not
+   accurate, therefore use the definitions from above.  */
+# if !@GNULIBHEADERS_OVERRIDE_WINT_T@
+#  undef WINT_MIN
+#  undef WINT_MAX
+#  if @HAVE_SIGNED_WINT_T@
+#   define WINT_MIN  \
+     _STDINT_SIGNED_MIN (@BITSIZEOF_WINT_T@, 0@WINT_T_SUFFIX@)
+#  else
+#   define WINT_MIN  \
+     _STDINT_UNSIGNED_MIN (@BITSIZEOF_WINT_T@, 0@WINT_T_SUFFIX@)
+#  endif
+#  define WINT_MAX  \
+    _STDINT_MAX (@HAVE_SIGNED_WINT_T@, @BITSIZEOF_WINT_T@, 0@WINT_T_SUFFIX@)
+# endif
+
+/* 7.18.4. Macros for integer constants */
+
+/* 7.18.4.1. Macros for minimum-width integer constants */
+/* According to ISO C 99 Technical Corrigendum 1 */
+
+/* Here we assume a standard architecture where the hardware integer
+   types have 8, 16, 32, optionally 64 bits, and int is 32 bits.  */
+
+# undef INT8_C
+# undef UINT8_C
+# define INT8_C(x) x
+# define UINT8_C(x) x
+
+# undef INT16_C
+# undef UINT16_C
+# define INT16_C(x) x
+# define UINT16_C(x) x
+
+# undef INT32_C
+# undef UINT32_C
+# define INT32_C(x) x
+# define UINT32_C(x) x ## U
+
+# undef INT64_C
+# undef UINT64_C
+# if LONG_MAX >> 31 >> 31 == 1
+#  define INT64_C(x) x##L
+# elif defined _MSC_VER
+#  define INT64_C(x) x##i64
+# else
+#  define INT64_C(x) x##LL
+# endif
+# if ULONG_MAX >> 31 >> 31 >> 1 == 1
+#  define UINT64_C(x) x##UL
+# elif defined _MSC_VER
+#  define UINT64_C(x) x##ui64
+# else
+#  define UINT64_C(x) x##ULL
+# endif
+
+/* 7.18.4.2. Macros for greatest-width integer constants */
+
+# ifndef INTMAX_C
+#  if LONG_MAX >> 30 == 1
+#   define INTMAX_C(x)   x##LL
+#  elif defined GL_INT64_T
+#   define INTMAX_C(x)   INT64_C(x)
+#  else
+#   define INTMAX_C(x)   x##L
+#  endif
+# endif
+
+# ifndef UINTMAX_C
+#  if ULONG_MAX >> 31 == 1
+#   define UINTMAX_C(x)  x##ULL
+#  elif defined GL_UINT64_T
+#   define UINTMAX_C(x)  UINT64_C(x)
+#  else
+#   define UINTMAX_C(x)  x##UL
+#  endif
+# endif
+
+#endif /* !@HAVE_C99_STDINT_H@ */
+
+/* Macros specified by ISO/IEC TS 18661-1:2014.  */
+
+#if (!defined UINTMAX_WIDTH \
+     && (defined _GNU_SOURCE || defined __STDC_WANT_IEC_60559_BFP_EXT__))
+# ifdef INT8_MAX
+#  define INT8_WIDTH _GL_INTEGER_WIDTH (INT8_MIN, INT8_MAX)
+# endif
+# ifdef UINT8_MAX
+#  define UINT8_WIDTH _GL_INTEGER_WIDTH (0, UINT8_MAX)
+# endif
+# ifdef INT16_MAX
+#  define INT16_WIDTH _GL_INTEGER_WIDTH (INT16_MIN, INT16_MAX)
+# endif
+# ifdef UINT16_MAX
+#  define UINT16_WIDTH _GL_INTEGER_WIDTH (0, UINT16_MAX)
+# endif
+# ifdef INT32_MAX
+#  define INT32_WIDTH _GL_INTEGER_WIDTH (INT32_MIN, INT32_MAX)
+# endif
+# ifdef UINT32_MAX
+#  define UINT32_WIDTH _GL_INTEGER_WIDTH (0, UINT32_MAX)
+# endif
+# ifdef INT64_MAX
+#  define INT64_WIDTH _GL_INTEGER_WIDTH (INT64_MIN, INT64_MAX)
+# endif
+# ifdef UINT64_MAX
+#  define UINT64_WIDTH _GL_INTEGER_WIDTH (0, UINT64_MAX)
+# endif
+# define INT_LEAST8_WIDTH _GL_INTEGER_WIDTH (INT_LEAST8_MIN, INT_LEAST8_MAX)
+# define UINT_LEAST8_WIDTH _GL_INTEGER_WIDTH (0, UINT_LEAST8_MAX)
+# define INT_LEAST16_WIDTH _GL_INTEGER_WIDTH (INT_LEAST16_MIN, INT_LEAST16_MAX)
+# define UINT_LEAST16_WIDTH _GL_INTEGER_WIDTH (0, UINT_LEAST16_MAX)
+# define INT_LEAST32_WIDTH _GL_INTEGER_WIDTH (INT_LEAST32_MIN, INT_LEAST32_MAX)
+# define UINT_LEAST32_WIDTH _GL_INTEGER_WIDTH (0, UINT_LEAST32_MAX)
+# define INT_LEAST64_WIDTH _GL_INTEGER_WIDTH (INT_LEAST64_MIN, INT_LEAST64_MAX)
+# define UINT_LEAST64_WIDTH _GL_INTEGER_WIDTH (0, UINT_LEAST64_MAX)
+# define INT_FAST8_WIDTH _GL_INTEGER_WIDTH (INT_FAST8_MIN, INT_FAST8_MAX)
+# define UINT_FAST8_WIDTH _GL_INTEGER_WIDTH (0, UINT_FAST8_MAX)
+# define INT_FAST16_WIDTH _GL_INTEGER_WIDTH (INT_FAST16_MIN, INT_FAST16_MAX)
+# define UINT_FAST16_WIDTH _GL_INTEGER_WIDTH (0, UINT_FAST16_MAX)
+# define INT_FAST32_WIDTH _GL_INTEGER_WIDTH (INT_FAST32_MIN, INT_FAST32_MAX)
+# define UINT_FAST32_WIDTH _GL_INTEGER_WIDTH (0, UINT_FAST32_MAX)
+# define INT_FAST64_WIDTH _GL_INTEGER_WIDTH (INT_FAST64_MIN, INT_FAST64_MAX)
+# define UINT_FAST64_WIDTH _GL_INTEGER_WIDTH (0, UINT_FAST64_MAX)
+# define INTPTR_WIDTH _GL_INTEGER_WIDTH (INTPTR_MIN, INTPTR_MAX)
+# define UINTPTR_WIDTH _GL_INTEGER_WIDTH (0, UINTPTR_MAX)
+# define INTMAX_WIDTH _GL_INTEGER_WIDTH (INTMAX_MIN, INTMAX_MAX)
+# define UINTMAX_WIDTH _GL_INTEGER_WIDTH (0, UINTMAX_MAX)
+# define PTRDIFF_WIDTH _GL_INTEGER_WIDTH (PTRDIFF_MIN, PTRDIFF_MAX)
+# define SIZE_WIDTH _GL_INTEGER_WIDTH (0, SIZE_MAX)
+# define WCHAR_WIDTH _GL_INTEGER_WIDTH (WCHAR_MIN, WCHAR_MAX)
+# ifdef WINT_MAX
+#  define WINT_WIDTH _GL_INTEGER_WIDTH (WINT_MIN, WINT_MAX)
+# endif
+# ifdef SIG_ATOMIC_MAX
+#  define SIG_ATOMIC_WIDTH _GL_INTEGER_WIDTH (SIG_ATOMIC_MIN, SIG_ATOMIC_MAX)
+# endif
+#endif /* !WINT_WIDTH && (_GNU_SOURCE || __STDC_WANT_IEC_60559_BFP_EXT__) */
+
+#endif /* _@GUARD_PREFIX@_STDINT_H */
+#endif /* !(defined __ANDROID__ && ...) */
+#endif /* !defined _@GUARD_PREFIX@_STDINT_H && !defined _GL_JUST_INCLUDE_SYSTEM_STDINT_H */
diff --git a/src/grep/lib/stdio-impl.h b/src/grep/lib/stdio-impl.h
new file mode 100644
index 0000000..3fa94b4
--- /dev/null
+++ b/src/grep/lib/stdio-impl.h
@@ -0,0 +1,212 @@
+/* Implementation details of FILE streams.
+   Copyright (C) 2007-2008, 2010-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Many stdio implementations have the same logic and therefore can share
+   the same implementation of stdio extension API, except that some fields
+   have different naming conventions, or their access requires some casts.  */
+
+/* Glibc 2.28 made _IO_UNBUFFERED and _IO_IN_BACKUP private.  For now, work
+   around this problem by defining them ourselves.  FIXME: Do not rely on glibc
+   internals.  */
+#if defined _IO_EOF_SEEN
+# if !defined _IO_UNBUFFERED
+#  define _IO_UNBUFFERED 0x2
+# endif
+# if !defined _IO_IN_BACKUP
+#  define _IO_IN_BACKUP 0x100
+# endif
+#endif
+
+/* BSD stdio derived implementations.  */
+
+#if defined __NetBSD__                         /* NetBSD */
+/* Get __NetBSD_Version__.  */
+# include <sys/param.h>
+#endif
+
+#include <errno.h>                             /* For detecting Plan9.  */
+
+#if defined __sferror || defined __DragonFly__ || defined __ANDROID__
+  /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Minix 3, Android */
+
+# if defined __DragonFly__          /* DragonFly */
+  /* See <https://gitweb.dragonflybsd.org/dragonfly.git/blob_plain/HEAD:/lib/libc/stdio/priv_stdio.h>.  */
+#  define fp_ ((struct { struct __FILE_public pub; \
+                         struct { unsigned char *_base; int _size; } _bf; \
+                         void *cookie; \
+                         void *_close; \
+                         void *_read; \
+                         void *_seek; \
+                         void *_write; \
+                         struct { unsigned char *_base; int _size; } _ub; \
+                         int _ur; \
+                         unsigned char _ubuf[3]; \
+                         unsigned char _nbuf[1]; \
+                         struct { unsigned char *_base; int _size; } _lb; \
+                         int _blksize; \
+                         fpos_t _offset; \
+                         /* More fields, not relevant here.  */ \
+                       } *) fp)
+  /* See <https://gitweb.dragonflybsd.org/dragonfly.git/blob_plain/HEAD:/include/stdio.h>.  */
+#  define _p pub._p
+#  define _flags pub._flags
+#  define _r pub._r
+#  define _w pub._w
+# elif defined __ANDROID__ /* Android */
+#  ifdef __LP64__
+#   define _gl_flags_file_t int
+#  else
+#   define _gl_flags_file_t short
+#  endif
+  /* Up to this commit from 2015-10-12
+     <https://android.googlesource.com/platform/bionic.git/+/f0141dfab10a4b332769d52fa76631a64741297a>
+     the innards of FILE were public, and fp_ub could be defined like for OpenBSD,
+     see <https://android.googlesource.com/platform/bionic.git/+/e78392637d5086384a5631ddfdfa8d7ec8326ee3/libc/stdio/fileext.h>
+     and <https://android.googlesource.com/platform/bionic.git/+/e78392637d5086384a5631ddfdfa8d7ec8326ee3/libc/stdio/local.h>.
+     After this commit, the innards of FILE are hidden.  */
+#  define fp_ ((struct { unsigned char *_p; \
+                         int _r; \
+                         int _w; \
+                         _gl_flags_file_t _flags; \
+                         _gl_flags_file_t _file; \
+                         struct { unsigned char *_base; size_t _size; } _bf; \
+                         int _lbfsize; \
+                         void *_cookie; \
+                         void *_close; \
+                         void *_read; \
+                         void *_seek; \
+                         void *_write; \
+                         struct { unsigned char *_base; size_t _size; } _ext; \
+                         unsigned char *_up; \
+                         int _ur; \
+                         unsigned char _ubuf[3]; \
+                         unsigned char _nbuf[1]; \
+                         struct { unsigned char *_base; size_t _size; } _lb; \
+                         int _blksize; \
+                         fpos_t _offset; \
+                         /* More fields, not relevant here.  */ \
+                       } *) fp)
+# else
+#  define fp_ fp
+# endif
+
+# if (defined __NetBSD__ && __NetBSD_Version__ >= 105270000) || defined __OpenBSD__ || defined __minix /* NetBSD >= 1.5ZA, OpenBSD, Minix 3 */
+  /* See <http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup>
+     and <https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup>
+     and <https://github.com/Stichting-MINIX-Research-Foundation/minix/blob/master/lib/libc/stdio/fileext.h> */
+  struct __sfileext
+    {
+      struct  __sbuf _ub; /* ungetc buffer */
+      /* More fields, not relevant here.  */
+    };
+#  define fp_ub ((struct __sfileext *) fp->_ext._base)->_ub
+# elif defined __ANDROID__                     /* Android */
+  struct __sfileext
+    {
+      struct { unsigned char *_base; size_t _size; } _ub; /* ungetc buffer */
+      /* More fields, not relevant here.  */
+    };
+#  define fp_ub ((struct __sfileext *) fp_->_ext._base)->_ub
+# else                                         /* FreeBSD, NetBSD <= 1.5Z, DragonFly, Mac OS X, Cygwin */
+#  define fp_ub fp_->_ub
+# endif
+
+# define HASUB(fp) (fp_ub._base != NULL)
+
+# if defined __ANDROID__ /* Android */
+  /* Needed after this commit from 2016-01-25
+     <https://android.googlesource.com/platform/bionic.git/+/e70e0e9267d069bf56a5078c99307e08a7280de7> */
+#  ifndef __SEOF
+#   define __SLBF 1
+#   define __SNBF 2
+#   define __SRD 4
+#   define __SWR 8
+#   define __SRW 0x10
+#   define __SEOF 0x20
+#   define __SERR 0x40
+#  endif
+#  ifndef __SOFF
+#   define __SOFF 0x1000
+#  endif
+# endif
+
+#endif
+
+
+/* SystemV derived implementations.  */
+
+#ifdef __TANDEM                     /* NonStop Kernel */
+# ifndef _IOERR
+/* These values were determined by the program 'stdioext-flags' at
+   <https://lists.gnu.org/r/bug-gnulib/2010-12/msg00165.html>.  */
+#  define _IOERR   0x40
+#  define _IOREAD  0x80
+#  define _IOWRT    0x4
+#  define _IORW   0x100
+# endif
+#endif
+
+#if defined _IOERR
+
+# if defined __sun && defined _LP64 /* Solaris/{SPARC,AMD64} 64-bit */
+#  define fp_ ((struct { unsigned char *_ptr; \
+                         unsigned char *_base; \
+                         unsigned char *_end; \
+                         long _cnt; \
+                         int _file; \
+                         unsigned int _flag; \
+                       } *) fp)
+# elif defined __VMS                /* OpenVMS */
+#  define fp_ ((struct _iobuf *) fp)
+# else
+#  define fp_ fp
+# endif
+
+# if defined _SCO_DS || (defined __SCO_VERSION__ || defined __sysv5__)  /* OpenServer 5, OpenServer 6, UnixWare 7 */
+#  define _cnt __cnt
+#  define _ptr __ptr
+#  define _base __base
+#  define _flag __flag
+# endif
+
+#elif defined _WIN32 && ! defined __CYGWIN__  /* newer Windows with MSVC */
+
+/* <stdio.h> does not define the innards of FILE any more.  */
+# define WINDOWS_OPAQUE_FILE
+
+struct _gl_real_FILE
+{
+  /* Note: Compared to older Windows and to mingw, it has the fields
+     _base and _cnt swapped. */
+  unsigned char *_ptr;
+  unsigned char *_base;
+  int _cnt;
+  int _flag;
+  int _file;
+  int _charbuf;
+  int _bufsiz;
+};
+# define fp_ ((struct _gl_real_FILE *) fp)
+
+/* These values were determined by a program similar to the one at
+   <https://lists.gnu.org/r/bug-gnulib/2010-12/msg00165.html>.  */
+# define _IOREAD   0x1
+# define _IOWRT    0x2
+# define _IORW     0x4
+# define _IOEOF    0x8
+# define _IOERR   0x10
+
+#endif
diff --git a/src/grep/lib/stdio.in.h b/src/grep/lib/stdio.in.h
new file mode 100644
index 0000000..f1bf817
--- /dev/null
+++ b/src/grep/lib/stdio.in.h
@@ -0,0 +1,1699 @@
+/* A GNU-like <stdio.h>.
+
+   Copyright (C) 2004, 2007-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if defined __need_FILE || defined __need___FILE || defined _GL_ALREADY_INCLUDING_STDIO_H
+/* Special invocation convention:
+   - Inside glibc header files.
+   - On OSF/1 5.1 we have a sequence of nested includes
+     <stdio.h> -> <getopt.h> -> <ctype.h> -> <sys/localedef.h> ->
+     <sys/lc_core.h> -> <nl_types.h> -> <mesg.h> -> <stdio.h>.
+     In this situation, the functions are not yet declared, therefore we cannot
+     provide the C++ aliases.  */
+
+#@INCLUDE_NEXT@ @NEXT_STDIO_H@
+
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_STDIO_H
+
+#define _GL_ALREADY_INCLUDING_STDIO_H
+
+/* The include_next requires a split double-inclusion guard.  */
+#@INCLUDE_NEXT@ @NEXT_STDIO_H@
+
+#undef _GL_ALREADY_INCLUDING_STDIO_H
+
+#ifndef _@GUARD_PREFIX@_STDIO_H
+#define _@GUARD_PREFIX@_STDIO_H
+
+/* Get va_list.  Needed on many systems, including glibc 2.8.  */
+#include <stdarg.h>
+
+#include <stddef.h>
+
+/* Get off_t and ssize_t.  Needed on many systems, including glibc 2.8
+   and eglibc 2.11.2.
+   May also define off_t to a 64-bit type on native Windows.  */
+#include <sys/types.h>
+
+/* The __attribute__ feature is available in gcc versions 2.5 and later.
+   The __-protected variants of the attributes 'format' and 'printf' are
+   accepted by gcc versions 2.6.4 (effectively 2.7) and later.
+   We enable _GL_ATTRIBUTE_FORMAT only if these are supported too, because
+   gnulib and libintl do '#define printf __printf__' when they override
+   the 'printf' function.  */
+#ifndef _GL_ATTRIBUTE_FORMAT
+# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7) || defined __clang__
+#  define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
+# else
+#  define _GL_ATTRIBUTE_FORMAT(spec) /* empty */
+# endif
+#endif
+
+/* An __attribute__ __format__ specifier for a function that takes a format
+   string and arguments, where the format string directives are the ones
+   standardized by ISO C99 and POSIX.
+   _GL_ATTRIBUTE_SPEC_PRINTF_STANDARD  */
+/* __gnu_printf__ is supported in GCC >= 4.4.  */
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
+# define _GL_ATTRIBUTE_SPEC_PRINTF_STANDARD __gnu_printf__
+#else
+# define _GL_ATTRIBUTE_SPEC_PRINTF_STANDARD __printf__
+#endif
+
+/* An __attribute__ __format__ specifier for a function that takes a format
+   string and arguments, where the format string directives are the ones of the
+   system printf(), rather than the ones standardized by ISO C99 and POSIX.
+   _GL_ATTRIBUTE_SPEC_PRINTF_SYSTEM  */
+/* On mingw, Gnulib sets __USE_MINGW_ANSI_STDIO in order to get closer to
+   the standards.  The macro GNULIB_PRINTF_ATTRIBUTE_FLAVOR_GNU indicates
+   whether this change is effective.  On older mingw, it is not.  */
+#if GNULIB_PRINTF_ATTRIBUTE_FLAVOR_GNU
+# define _GL_ATTRIBUTE_SPEC_PRINTF_SYSTEM _GL_ATTRIBUTE_SPEC_PRINTF_STANDARD
+#else
+# define _GL_ATTRIBUTE_SPEC_PRINTF_SYSTEM __printf__
+#endif
+
+/* _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD
+   indicates to GCC that the function takes a format string and arguments,
+   where the format string directives are the ones standardized by ISO C99
+   and POSIX.  */
+#define _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD(formatstring_parameter, first_argument) \
+  _GL_ATTRIBUTE_FORMAT ((_GL_ATTRIBUTE_SPEC_PRINTF_STANDARD, formatstring_parameter, first_argument))
+
+/* _GL_ATTRIBUTE_FORMAT_PRINTF_SYSTEM is like _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD,
+   except that it indicates to GCC that the supported format string directives
+   are the ones of the system printf(), rather than the ones standardized by
+   ISO C99 and POSIX.  */
+#define _GL_ATTRIBUTE_FORMAT_PRINTF_SYSTEM(formatstring_parameter, first_argument) \
+  _GL_ATTRIBUTE_FORMAT ((_GL_ATTRIBUTE_SPEC_PRINTF_SYSTEM, formatstring_parameter, first_argument))
+
+/* _GL_ATTRIBUTE_FORMAT_SCANF
+   indicates to GCC that the function takes a format string and arguments,
+   where the format string directives are the ones standardized by ISO C99
+   and POSIX.  */
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
+# define _GL_ATTRIBUTE_FORMAT_SCANF(formatstring_parameter, first_argument) \
+   _GL_ATTRIBUTE_FORMAT ((__gnu_scanf__, formatstring_parameter, first_argument))
+#else
+# define _GL_ATTRIBUTE_FORMAT_SCANF(formatstring_parameter, first_argument) \
+   _GL_ATTRIBUTE_FORMAT ((__scanf__, formatstring_parameter, first_argument))
+#endif
+
+/* _GL_ATTRIBUTE_FORMAT_SCANF_SYSTEM is like _GL_ATTRIBUTE_FORMAT_SCANF,
+   except that it indicates to GCC that the supported format string directives
+   are the ones of the system scanf(), rather than the ones standardized by
+   ISO C99 and POSIX.  */
+#define _GL_ATTRIBUTE_FORMAT_SCANF_SYSTEM(formatstring_parameter, first_argument) \
+  _GL_ATTRIBUTE_FORMAT ((__scanf__, formatstring_parameter, first_argument))
+
+/* Solaris 10 and NetBSD 7.0 declare renameat in <unistd.h>, not in <stdio.h>.  */
+/* But in any case avoid namespace pollution on glibc systems.  */
+#if (@GNULIB_RENAMEAT@ || defined GNULIB_POSIXCHECK) && (defined __sun || defined __NetBSD__) \
+    && ! defined __GLIBC__
+# include <unistd.h>
+#endif
+
+/* Android 4.3 declares renameat in <sys/stat.h>, not in <stdio.h>.  */
+/* But in any case avoid namespace pollution on glibc systems.  */
+#if (@GNULIB_RENAMEAT@ || defined GNULIB_POSIXCHECK) && defined __ANDROID__ \
+    && ! defined __GLIBC__
+# include <sys/stat.h>
+#endif
+
+/* MSVC declares 'perror' in <stdlib.h>, not in <stdio.h>.  We must include
+   it before we  #define perror rpl_perror.  */
+/* But in any case avoid namespace pollution on glibc systems.  */
+#if (@GNULIB_PERROR@ || defined GNULIB_POSIXCHECK) \
+    && (defined _WIN32 && ! defined __CYGWIN__) \
+    && ! defined __GLIBC__
+# include <stdlib.h>
+#endif
+
+/* MSVC declares 'remove' in <io.h>, not in <stdio.h>.  We must include
+   it before we  #define remove rpl_remove.  */
+/* MSVC declares 'rename' in <io.h>, not in <stdio.h>.  We must include
+   it before we  #define rename rpl_rename.  */
+/* But in any case avoid namespace pollution on glibc systems.  */
+#if (@GNULIB_REMOVE@ || @GNULIB_RENAME@ || defined GNULIB_POSIXCHECK) \
+    && (defined _WIN32 && ! defined __CYGWIN__) \
+    && ! defined __GLIBC__
+# include <io.h>
+#endif
+
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+/* Macros for stringification.  */
+#define _GL_STDIO_STRINGIZE(token) #token
+#define _GL_STDIO_MACROEXPAND_AND_STRINGIZE(token) _GL_STDIO_STRINGIZE(token)
+
+/* When also using extern inline, suppress the use of static inline in
+   standard headers of problematic Apple configurations, as Libc at
+   least through Libc-825.26 (2013-04-09) mishandles it; see, e.g.,
+   <https://lists.gnu.org/r/bug-gnulib/2012-12/msg00023.html>.
+   Perhaps Apple will fix this some day.  */
+#if (defined _GL_EXTERN_INLINE_IN_USE && defined __APPLE__ \
+     && defined __GNUC__ && defined __STDC__)
+# undef putc_unlocked
+#endif
+
+#if @GNULIB_DPRINTF@
+# if @REPLACE_DPRINTF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define dprintf rpl_dprintf
+#  endif
+_GL_FUNCDECL_RPL (dprintf, int, (int fd, const char *restrict format, ...)
+                                _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (2, 3)
+                                _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (dprintf, int, (int fd, const char *restrict format, ...));
+# else
+#  if !@HAVE_DPRINTF@
+_GL_FUNCDECL_SYS (dprintf, int, (int fd, const char *restrict format, ...)
+                                _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (2, 3)
+                                _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (dprintf, int, (int fd, const char *restrict format, ...));
+# endif
+_GL_CXXALIASWARN (dprintf);
+#elif defined GNULIB_POSIXCHECK
+# undef dprintf
+# if HAVE_RAW_DECL_DPRINTF
+_GL_WARN_ON_USE (dprintf, "dprintf is unportable - "
+                 "use gnulib module dprintf for portability");
+# endif
+#endif
+
+#if @GNULIB_FCLOSE@
+/* Close STREAM and its underlying file descriptor.  */
+# if @REPLACE_FCLOSE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define fclose rpl_fclose
+#  endif
+_GL_FUNCDECL_RPL (fclose, int, (FILE *stream) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (fclose, int, (FILE *stream));
+# else
+_GL_CXXALIAS_SYS (fclose, int, (FILE *stream));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (fclose);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef fclose
+/* Assume fclose is always declared.  */
+_GL_WARN_ON_USE (fclose, "fclose is not always POSIX compliant - "
+                 "use gnulib module fclose for portable POSIX compliance");
+#endif
+
+#if @GNULIB_MDA_FCLOSEALL@
+/* On native Windows, map 'fcloseall' to '_fcloseall', so that -loldnames is
+   not required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::fcloseall on all platforms that have
+   it.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fcloseall
+#   define fcloseall _fcloseall
+#  endif
+_GL_CXXALIAS_MDA (fcloseall, int, (void));
+# else
+#  if @HAVE_DECL_FCLOSEALL@
+#   if defined __FreeBSD__ || defined __DragonFly__
+_GL_CXXALIAS_SYS (fcloseall, void, (void));
+#   else
+_GL_CXXALIAS_SYS (fcloseall, int, (void));
+#   endif
+#  endif
+# endif
+# if (defined _WIN32 && !defined __CYGWIN__) || @HAVE_DECL_FCLOSEALL@
+_GL_CXXALIASWARN (fcloseall);
+# endif
+#endif
+
+#if @GNULIB_FDOPEN@
+# if @REPLACE_FDOPEN@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fdopen
+#   define fdopen rpl_fdopen
+#  endif
+_GL_FUNCDECL_RPL (fdopen, FILE *,
+                  (int fd, const char *mode)
+                  _GL_ARG_NONNULL ((2)) _GL_ATTRIBUTE_DEALLOC (fclose, 1));
+_GL_CXXALIAS_RPL (fdopen, FILE *, (int fd, const char *mode));
+# elif defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fdopen
+#   define fdopen _fdopen
+#  endif
+_GL_CXXALIAS_MDA (fdopen, FILE *, (int fd, const char *mode));
+# else
+#  if __GNUC__ >= 11
+/* For -Wmismatched-dealloc: Associate fdopen with fclose or rpl_fclose.  */
+_GL_FUNCDECL_SYS (fdopen, FILE *,
+                  (int fd, const char *mode)
+                  _GL_ARG_NONNULL ((2)) _GL_ATTRIBUTE_DEALLOC (fclose, 1));
+#  endif
+_GL_CXXALIAS_SYS (fdopen, FILE *, (int fd, const char *mode));
+# endif
+_GL_CXXALIASWARN (fdopen);
+#else
+# if @GNULIB_FCLOSE@ && __GNUC__ >= 11 && !defined fdopen
+/* For -Wmismatched-dealloc: Associate fdopen with fclose or rpl_fclose.  */
+_GL_FUNCDECL_SYS (fdopen, FILE *,
+                  (int fd, const char *mode)
+                  _GL_ARG_NONNULL ((2)) _GL_ATTRIBUTE_DEALLOC (fclose, 1));
+# endif
+# if defined GNULIB_POSIXCHECK
+#  undef fdopen
+/* Assume fdopen is always declared.  */
+_GL_WARN_ON_USE (fdopen, "fdopen on native Windows platforms is not POSIX compliant - "
+                 "use gnulib module fdopen for portability");
+# elif @GNULIB_MDA_FDOPEN@
+/* On native Windows, map 'fdopen' to '_fdopen', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::fdopen always.  */
+#  if defined _WIN32 && !defined __CYGWIN__
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    undef fdopen
+#    define fdopen _fdopen
+#   endif
+_GL_CXXALIAS_MDA (fdopen, FILE *, (int fd, const char *mode));
+#  else
+_GL_CXXALIAS_SYS (fdopen, FILE *, (int fd, const char *mode));
+#  endif
+_GL_CXXALIASWARN (fdopen);
+# endif
+#endif
+
+#if @GNULIB_FFLUSH@
+/* Flush all pending data on STREAM according to POSIX rules.  Both
+   output and seekable input streams are supported.
+   Note! LOSS OF DATA can occur if fflush is applied on an input stream
+   that is _not_seekable_ or on an update stream that is _not_seekable_
+   and in which the most recent operation was input.  Seekability can
+   be tested with lseek(fileno(fp),0,SEEK_CUR).  */
+# if @REPLACE_FFLUSH@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define fflush rpl_fflush
+#  endif
+_GL_FUNCDECL_RPL (fflush, int, (FILE *gl_stream));
+_GL_CXXALIAS_RPL (fflush, int, (FILE *gl_stream));
+# else
+_GL_CXXALIAS_SYS (fflush, int, (FILE *gl_stream));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (fflush);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef fflush
+/* Assume fflush is always declared.  */
+_GL_WARN_ON_USE (fflush, "fflush is not always POSIX compliant - "
+                 "use gnulib module fflush for portable POSIX compliance");
+#endif
+
+#if @GNULIB_FGETC@
+# if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fgetc
+#   define fgetc rpl_fgetc
+#  endif
+_GL_FUNCDECL_RPL (fgetc, int, (FILE *stream) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (fgetc, int, (FILE *stream));
+# else
+_GL_CXXALIAS_SYS (fgetc, int, (FILE *stream));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (fgetc);
+# endif
+#endif
+
+#if @GNULIB_FGETS@
+# if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fgets
+#   define fgets rpl_fgets
+#  endif
+_GL_FUNCDECL_RPL (fgets, char *,
+                  (char *restrict s, int n, FILE *restrict stream)
+                  _GL_ARG_NONNULL ((1, 3)));
+_GL_CXXALIAS_RPL (fgets, char *,
+                  (char *restrict s, int n, FILE *restrict stream));
+# else
+_GL_CXXALIAS_SYS (fgets, char *,
+                  (char *restrict s, int n, FILE *restrict stream));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (fgets);
+# endif
+#endif
+
+#if @GNULIB_MDA_FILENO@
+/* On native Windows, map 'fileno' to '_fileno', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::fileno always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fileno
+#   define fileno _fileno
+#  endif
+_GL_CXXALIAS_MDA (fileno, int, (FILE *restrict stream));
+# else
+_GL_CXXALIAS_SYS (fileno, int, (FILE *restrict stream));
+# endif
+_GL_CXXALIASWARN (fileno);
+#endif
+
+#if @GNULIB_FOPEN@
+# if @REPLACE_FOPEN@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fopen
+#   define fopen rpl_fopen
+#  endif
+_GL_FUNCDECL_RPL (fopen, FILE *,
+                  (const char *restrict filename, const char *restrict mode)
+                  _GL_ARG_NONNULL ((1, 2)) _GL_ATTRIBUTE_DEALLOC (fclose, 1));
+_GL_CXXALIAS_RPL (fopen, FILE *,
+                  (const char *restrict filename, const char *restrict mode));
+# else
+#  if __GNUC__ >= 11
+/* For -Wmismatched-dealloc: Associate fopen with fclose or rpl_fclose.  */
+_GL_FUNCDECL_SYS (fopen, FILE *,
+                  (const char *restrict filename, const char *restrict mode)
+                  _GL_ARG_NONNULL ((1, 2)) _GL_ATTRIBUTE_DEALLOC (fclose, 1));
+#  endif
+_GL_CXXALIAS_SYS (fopen, FILE *,
+                  (const char *restrict filename, const char *restrict mode));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (fopen);
+# endif
+#else
+# if @GNULIB_FCLOSE@ && __GNUC__ >= 11 && !defined fopen
+/* For -Wmismatched-dealloc: Associate fopen with fclose or rpl_fclose.  */
+_GL_FUNCDECL_SYS (fopen, FILE *,
+                  (const char *restrict filename, const char *restrict mode)
+                  _GL_ARG_NONNULL ((1, 2)) _GL_ATTRIBUTE_DEALLOC (fclose, 1));
+# endif
+# if defined GNULIB_POSIXCHECK
+#  undef fopen
+/* Assume fopen is always declared.  */
+_GL_WARN_ON_USE (fopen, "fopen on native Windows platforms is not POSIX compliant - "
+                 "use gnulib module fopen for portability");
+# endif
+#endif
+
+#if @GNULIB_FPRINTF_POSIX@ || @GNULIB_FPRINTF@
+# if (@GNULIB_FPRINTF_POSIX@ && @REPLACE_FPRINTF@) \
+     || (@GNULIB_FPRINTF@ && @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@))
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define fprintf rpl_fprintf
+#  endif
+#  define GNULIB_overrides_fprintf 1
+#  if @GNULIB_FPRINTF_POSIX@ || @GNULIB_VFPRINTF_POSIX@
+_GL_FUNCDECL_RPL (fprintf, int,
+                  (FILE *restrict fp, const char *restrict format, ...)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (2, 3)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  else
+_GL_FUNCDECL_RPL (fprintf, int,
+                  (FILE *restrict fp, const char *restrict format, ...)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_SYSTEM (2, 3)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_RPL (fprintf, int,
+                  (FILE *restrict fp, const char *restrict format, ...));
+# else
+_GL_CXXALIAS_SYS (fprintf, int,
+                  (FILE *restrict fp, const char *restrict format, ...));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (fprintf);
+# endif
+#endif
+#if !@GNULIB_FPRINTF_POSIX@ && defined GNULIB_POSIXCHECK
+# if !GNULIB_overrides_fprintf
+#  undef fprintf
+# endif
+/* Assume fprintf is always declared.  */
+_GL_WARN_ON_USE (fprintf, "fprintf is not always POSIX compliant - "
+                 "use gnulib module fprintf-posix for portable "
+                 "POSIX compliance");
+#endif
+
+#if @GNULIB_FPURGE@
+/* Discard all pending buffered I/O data on STREAM.
+   STREAM must not be wide-character oriented.
+   When discarding pending output, the file position is set back to where it
+   was before the write calls.  When discarding pending input, the file
+   position is advanced to match the end of the previously read input.
+   Return 0 if successful.  Upon error, return -1 and set errno.  */
+# if @REPLACE_FPURGE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define fpurge rpl_fpurge
+#  endif
+_GL_FUNCDECL_RPL (fpurge, int, (FILE *gl_stream) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (fpurge, int, (FILE *gl_stream));
+# else
+#  if !@HAVE_DECL_FPURGE@
+_GL_FUNCDECL_SYS (fpurge, int, (FILE *gl_stream) _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (fpurge, int, (FILE *gl_stream));
+# endif
+_GL_CXXALIASWARN (fpurge);
+#elif defined GNULIB_POSIXCHECK
+# undef fpurge
+# if HAVE_RAW_DECL_FPURGE
+_GL_WARN_ON_USE (fpurge, "fpurge is not always present - "
+                 "use gnulib module fpurge for portability");
+# endif
+#endif
+
+#if @GNULIB_FPUTC@
+# if @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@)
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fputc
+#   define fputc rpl_fputc
+#  endif
+_GL_FUNCDECL_RPL (fputc, int, (int c, FILE *stream) _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (fputc, int, (int c, FILE *stream));
+# else
+_GL_CXXALIAS_SYS (fputc, int, (int c, FILE *stream));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (fputc);
+# endif
+#endif
+
+#if @GNULIB_FPUTS@
+# if @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@)
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fputs
+#   define fputs rpl_fputs
+#  endif
+_GL_FUNCDECL_RPL (fputs, int,
+                  (const char *restrict string, FILE *restrict stream)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (fputs, int,
+                  (const char *restrict string, FILE *restrict stream));
+# else
+_GL_CXXALIAS_SYS (fputs, int,
+                  (const char *restrict string, FILE *restrict stream));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (fputs);
+# endif
+#endif
+
+#if @GNULIB_FREAD@
+# if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fread
+#   define fread rpl_fread
+#  endif
+_GL_FUNCDECL_RPL (fread, size_t,
+                  (void *restrict ptr, size_t s, size_t n,
+                   FILE *restrict stream)
+                  _GL_ARG_NONNULL ((4)));
+_GL_CXXALIAS_RPL (fread, size_t,
+                  (void *restrict ptr, size_t s, size_t n,
+                   FILE *restrict stream));
+# else
+_GL_CXXALIAS_SYS (fread, size_t,
+                  (void *restrict ptr, size_t s, size_t n,
+                   FILE *restrict stream));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (fread);
+# endif
+#endif
+
+#if @GNULIB_FREOPEN@
+# if @REPLACE_FREOPEN@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef freopen
+#   define freopen rpl_freopen
+#  endif
+_GL_FUNCDECL_RPL (freopen, FILE *,
+                  (const char *restrict filename, const char *restrict mode,
+                   FILE *restrict stream)
+                  _GL_ARG_NONNULL ((2, 3)));
+_GL_CXXALIAS_RPL (freopen, FILE *,
+                  (const char *restrict filename, const char *restrict mode,
+                   FILE *restrict stream));
+# else
+_GL_CXXALIAS_SYS (freopen, FILE *,
+                  (const char *restrict filename, const char *restrict mode,
+                   FILE *restrict stream));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (freopen);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef freopen
+/* Assume freopen is always declared.  */
+_GL_WARN_ON_USE (freopen,
+                 "freopen on native Windows platforms is not POSIX compliant - "
+                 "use gnulib module freopen for portability");
+#endif
+
+#if @GNULIB_FSCANF@
+# if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fscanf
+#   define fscanf rpl_fscanf
+#  endif
+_GL_FUNCDECL_RPL (fscanf, int,
+                  (FILE *restrict stream, const char *restrict format, ...)
+                  _GL_ATTRIBUTE_FORMAT_SCANF_SYSTEM (2, 3)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (fscanf, int,
+                  (FILE *restrict stream, const char *restrict format, ...));
+# else
+_GL_CXXALIAS_SYS (fscanf, int,
+                  (FILE *restrict stream, const char *restrict format, ...));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (fscanf);
+# endif
+#endif
+
+
+/* Set up the following warnings, based on which modules are in use.
+   GNU Coding Standards discourage the use of fseek, since it imposes
+   an arbitrary limitation on some 32-bit hosts.  Remember that the
+   fseek module depends on the fseeko module, so we only have three
+   cases to consider:
+
+   1. The developer is not using either module.  Issue a warning under
+   GNULIB_POSIXCHECK for both functions, to remind them that both
+   functions have bugs on some systems.  _GL_NO_LARGE_FILES has no
+   impact on this warning.
+
+   2. The developer is using both modules.  They may be unaware of the
+   arbitrary limitations of fseek, so issue a warning under
+   GNULIB_POSIXCHECK.  On the other hand, they may be using both
+   modules intentionally, so the developer can define
+   _GL_NO_LARGE_FILES in the compilation units where the use of fseek
+   is safe, to silence the warning.
+
+   3. The developer is using the fseeko module, but not fseek.  Gnulib
+   guarantees that fseek will still work around platform bugs in that
+   case, but we presume that the developer is aware of the pitfalls of
+   fseek and was trying to avoid it, so issue a warning even when
+   GNULIB_POSIXCHECK is undefined.  Again, _GL_NO_LARGE_FILES can be
+   defined to silence the warning in particular compilation units.
+   In C++ compilations with GNULIB_NAMESPACE, in order to avoid that
+   fseek gets defined as a macro, it is recommended that the developer
+   uses the fseek module, even if he is not calling the fseek function.
+
+   Most gnulib clients that perform stream operations should fall into
+   category 3.  */
+
+#if @GNULIB_FSEEK@
+# if defined GNULIB_POSIXCHECK && !defined _GL_NO_LARGE_FILES
+#  define _GL_FSEEK_WARN /* Category 2, above.  */
+#  undef fseek
+# endif
+# if @REPLACE_FSEEK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fseek
+#   define fseek rpl_fseek
+#  endif
+_GL_FUNCDECL_RPL (fseek, int, (FILE *fp, long offset, int whence)
+                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (fseek, int, (FILE *fp, long offset, int whence));
+# else
+_GL_CXXALIAS_SYS (fseek, int, (FILE *fp, long offset, int whence));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (fseek);
+# endif
+#endif
+
+#if @GNULIB_FSEEKO@
+# if !@GNULIB_FSEEK@ && !defined _GL_NO_LARGE_FILES
+#  define _GL_FSEEK_WARN /* Category 3, above.  */
+#  undef fseek
+# endif
+# if @REPLACE_FSEEKO@
+/* Provide an fseeko function that is aware of a preceding fflush(), and which
+   detects pipes.  */
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fseeko
+#   define fseeko rpl_fseeko
+#  endif
+_GL_FUNCDECL_RPL (fseeko, int, (FILE *fp, off_t offset, int whence)
+                               _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (fseeko, int, (FILE *fp, off_t offset, int whence));
+# else
+#  if ! @HAVE_DECL_FSEEKO@
+_GL_FUNCDECL_SYS (fseeko, int, (FILE *fp, off_t offset, int whence)
+                               _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (fseeko, int, (FILE *fp, off_t offset, int whence));
+# endif
+_GL_CXXALIASWARN (fseeko);
+#elif defined GNULIB_POSIXCHECK
+# define _GL_FSEEK_WARN /* Category 1, above.  */
+# undef fseek
+# undef fseeko
+# if HAVE_RAW_DECL_FSEEKO
+_GL_WARN_ON_USE (fseeko, "fseeko is unportable - "
+                 "use gnulib module fseeko for portability");
+# endif
+#endif
+
+#ifdef _GL_FSEEK_WARN
+# undef _GL_FSEEK_WARN
+/* Here, either fseek is undefined (but C89 guarantees that it is
+   declared), or it is defined as rpl_fseek (declared above).  */
+_GL_WARN_ON_USE (fseek, "fseek cannot handle files larger than 4 GB "
+                 "on 32-bit platforms - "
+                 "use fseeko function for handling of large files");
+#endif
+
+
+/* ftell, ftello.  See the comments on fseek/fseeko.  */
+
+#if @GNULIB_FTELL@
+# if defined GNULIB_POSIXCHECK && !defined _GL_NO_LARGE_FILES
+#  define _GL_FTELL_WARN /* Category 2, above.  */
+#  undef ftell
+# endif
+# if @REPLACE_FTELL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef ftell
+#   define ftell rpl_ftell
+#  endif
+_GL_FUNCDECL_RPL (ftell, long, (FILE *fp) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (ftell, long, (FILE *fp));
+# else
+_GL_CXXALIAS_SYS (ftell, long, (FILE *fp));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (ftell);
+# endif
+#endif
+
+#if @GNULIB_FTELLO@
+# if !@GNULIB_FTELL@ && !defined _GL_NO_LARGE_FILES
+#  define _GL_FTELL_WARN /* Category 3, above.  */
+#  undef ftell
+# endif
+# if @REPLACE_FTELLO@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef ftello
+#   define ftello rpl_ftello
+#  endif
+_GL_FUNCDECL_RPL (ftello, off_t, (FILE *fp) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (ftello, off_t, (FILE *fp));
+# else
+#  if ! @HAVE_DECL_FTELLO@
+_GL_FUNCDECL_SYS (ftello, off_t, (FILE *fp) _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (ftello, off_t, (FILE *fp));
+# endif
+_GL_CXXALIASWARN (ftello);
+#elif defined GNULIB_POSIXCHECK
+# define _GL_FTELL_WARN /* Category 1, above.  */
+# undef ftell
+# undef ftello
+# if HAVE_RAW_DECL_FTELLO
+_GL_WARN_ON_USE (ftello, "ftello is unportable - "
+                 "use gnulib module ftello for portability");
+# endif
+#endif
+
+#ifdef _GL_FTELL_WARN
+# undef _GL_FTELL_WARN
+/* Here, either ftell is undefined (but C89 guarantees that it is
+   declared), or it is defined as rpl_ftell (declared above).  */
+_GL_WARN_ON_USE (ftell, "ftell cannot handle files larger than 4 GB "
+                 "on 32-bit platforms - "
+                 "use ftello function for handling of large files");
+#endif
+
+
+#if @GNULIB_FWRITE@
+# if @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@)
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fwrite
+#   define fwrite rpl_fwrite
+#  endif
+_GL_FUNCDECL_RPL (fwrite, size_t,
+                  (const void *restrict ptr, size_t s, size_t n,
+                   FILE *restrict stream)
+                  _GL_ARG_NONNULL ((1, 4)));
+_GL_CXXALIAS_RPL (fwrite, size_t,
+                  (const void *restrict ptr, size_t s, size_t n,
+                   FILE *restrict stream));
+# else
+_GL_CXXALIAS_SYS (fwrite, size_t,
+                  (const void *restrict ptr, size_t s, size_t n,
+                   FILE *restrict stream));
+
+/* Work around bug 11959 when fortifying glibc 2.4 through 2.15
+   <https://sourceware.org/bugzilla/show_bug.cgi?id=11959>,
+   which sometimes causes an unwanted diagnostic for fwrite calls.
+   This affects only function declaration attributes under certain
+   versions of gcc and clang, and is not needed for C++.  */
+#  if (0 < __USE_FORTIFY_LEVEL                                          \
+       && __GLIBC__ == 2 && 4 <= __GLIBC_MINOR__ && __GLIBC_MINOR__ <= 15 \
+       && 3 < __GNUC__ + (4 <= __GNUC_MINOR__)                          \
+       && !defined __cplusplus)
+#   undef fwrite
+#   undef fwrite_unlocked
+extern size_t __REDIRECT (rpl_fwrite,
+                          (const void *__restrict, size_t, size_t,
+                           FILE *__restrict),
+                          fwrite);
+extern size_t __REDIRECT (rpl_fwrite_unlocked,
+                          (const void *__restrict, size_t, size_t,
+                           FILE *__restrict),
+                          fwrite_unlocked);
+#   define fwrite rpl_fwrite
+#   define fwrite_unlocked rpl_fwrite_unlocked
+#  endif
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (fwrite);
+# endif
+#endif
+
+#if @GNULIB_GETC@
+# if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef getc
+#   define getc rpl_fgetc
+#  endif
+_GL_FUNCDECL_RPL (fgetc, int, (FILE *stream) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL_1 (getc, rpl_fgetc, int, (FILE *stream));
+# else
+_GL_CXXALIAS_SYS (getc, int, (FILE *stream));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (getc);
+# endif
+#endif
+
+#if @GNULIB_GETCHAR@
+# if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef getchar
+#   define getchar rpl_getchar
+#  endif
+_GL_FUNCDECL_RPL (getchar, int, (void));
+_GL_CXXALIAS_RPL (getchar, int, (void));
+# else
+_GL_CXXALIAS_SYS (getchar, int, (void));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (getchar);
+# endif
+#endif
+
+#if @GNULIB_GETDELIM@
+/* Read input, up to (and including) the next occurrence of DELIMITER, from
+   STREAM, store it in *LINEPTR (and NUL-terminate it).
+   *LINEPTR is a pointer returned from malloc (or NULL), pointing to *LINESIZE
+   bytes of space.  It is realloc'd as necessary.
+   Return the number of bytes read and stored at *LINEPTR (not including the
+   NUL terminator), or -1 on error or EOF.  */
+# if @REPLACE_GETDELIM@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef getdelim
+#   define getdelim rpl_getdelim
+#  endif
+_GL_FUNCDECL_RPL (getdelim, ssize_t,
+                  (char **restrict lineptr, size_t *restrict linesize,
+                   int delimiter,
+                   FILE *restrict stream)
+                  _GL_ARG_NONNULL ((1, 2, 4)));
+_GL_CXXALIAS_RPL (getdelim, ssize_t,
+                  (char **restrict lineptr, size_t *restrict linesize,
+                   int delimiter,
+                   FILE *restrict stream));
+# else
+#  if !@HAVE_DECL_GETDELIM@
+_GL_FUNCDECL_SYS (getdelim, ssize_t,
+                  (char **restrict lineptr, size_t *restrict linesize,
+                   int delimiter,
+                   FILE *restrict stream)
+                  _GL_ARG_NONNULL ((1, 2, 4)));
+#  endif
+_GL_CXXALIAS_SYS (getdelim, ssize_t,
+                  (char **restrict lineptr, size_t *restrict linesize,
+                   int delimiter,
+                   FILE *restrict stream));
+# endif
+_GL_CXXALIASWARN (getdelim);
+#elif defined GNULIB_POSIXCHECK
+# undef getdelim
+# if HAVE_RAW_DECL_GETDELIM
+_GL_WARN_ON_USE (getdelim, "getdelim is unportable - "
+                 "use gnulib module getdelim for portability");
+# endif
+#endif
+
+#if @GNULIB_GETLINE@
+/* Read a line, up to (and including) the next newline, from STREAM, store it
+   in *LINEPTR (and NUL-terminate it).
+   *LINEPTR is a pointer returned from malloc (or NULL), pointing to *LINESIZE
+   bytes of space.  It is realloc'd as necessary.
+   Return the number of bytes read and stored at *LINEPTR (not including the
+   NUL terminator), or -1 on error or EOF.  */
+# if @REPLACE_GETLINE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef getline
+#   define getline rpl_getline
+#  endif
+_GL_FUNCDECL_RPL (getline, ssize_t,
+                  (char **restrict lineptr, size_t *restrict linesize,
+                   FILE *restrict stream)
+                  _GL_ARG_NONNULL ((1, 2, 3)));
+_GL_CXXALIAS_RPL (getline, ssize_t,
+                  (char **restrict lineptr, size_t *restrict linesize,
+                   FILE *restrict stream));
+# else
+#  if !@HAVE_DECL_GETLINE@
+_GL_FUNCDECL_SYS (getline, ssize_t,
+                  (char **restrict lineptr, size_t *restrict linesize,
+                   FILE *restrict stream)
+                  _GL_ARG_NONNULL ((1, 2, 3)));
+#  endif
+_GL_CXXALIAS_SYS (getline, ssize_t,
+                  (char **restrict lineptr, size_t *restrict linesize,
+                   FILE *restrict stream));
+# endif
+# if @HAVE_DECL_GETLINE@
+_GL_CXXALIASWARN (getline);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef getline
+# if HAVE_RAW_DECL_GETLINE
+_GL_WARN_ON_USE (getline, "getline is unportable - "
+                 "use gnulib module getline for portability");
+# endif
+#endif
+
+/* It is very rare that the developer ever has full control of stdin,
+   so any use of gets warrants an unconditional warning; besides, C11
+   removed it.  */
+#undef gets
+#if HAVE_RAW_DECL_GETS && !defined __cplusplus
+_GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
+#endif
+
+#if @GNULIB_MDA_GETW@
+/* On native Windows, map 'getw' to '_getw', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::getw always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef getw
+#   define getw _getw
+#  endif
+_GL_CXXALIAS_MDA (getw, int, (FILE *restrict stream));
+# else
+_GL_CXXALIAS_SYS (getw, int, (FILE *restrict stream));
+# endif
+_GL_CXXALIASWARN (getw);
+#endif
+
+#if @GNULIB_OBSTACK_PRINTF@ || @GNULIB_OBSTACK_PRINTF_POSIX@
+struct obstack;
+/* Grow an obstack with formatted output.  Return the number of
+   bytes added to OBS.  No trailing nul byte is added, and the
+   object should be closed with obstack_finish before use.  Upon
+   memory allocation error, call obstack_alloc_failed_handler.  Upon
+   other error, return -1.  */
+# if @REPLACE_OBSTACK_PRINTF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define obstack_printf rpl_obstack_printf
+#  endif
+_GL_FUNCDECL_RPL (obstack_printf, int,
+                  (struct obstack *obs, const char *format, ...)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (2, 3)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (obstack_printf, int,
+                  (struct obstack *obs, const char *format, ...));
+# else
+#  if !@HAVE_DECL_OBSTACK_PRINTF@
+_GL_FUNCDECL_SYS (obstack_printf, int,
+                  (struct obstack *obs, const char *format, ...)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (2, 3)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (obstack_printf, int,
+                  (struct obstack *obs, const char *format, ...));
+# endif
+_GL_CXXALIASWARN (obstack_printf);
+# if @REPLACE_OBSTACK_PRINTF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define obstack_vprintf rpl_obstack_vprintf
+#  endif
+_GL_FUNCDECL_RPL (obstack_vprintf, int,
+                  (struct obstack *obs, const char *format, va_list args)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (2, 0)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (obstack_vprintf, int,
+                  (struct obstack *obs, const char *format, va_list args));
+# else
+#  if !@HAVE_DECL_OBSTACK_PRINTF@
+_GL_FUNCDECL_SYS (obstack_vprintf, int,
+                  (struct obstack *obs, const char *format, va_list args)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (2, 0)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (obstack_vprintf, int,
+                  (struct obstack *obs, const char *format, va_list args));
+# endif
+_GL_CXXALIASWARN (obstack_vprintf);
+#endif
+
+#if @GNULIB_PCLOSE@
+# if !@HAVE_PCLOSE@
+_GL_FUNCDECL_SYS (pclose, int, (FILE *stream) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (pclose, int, (FILE *stream));
+_GL_CXXALIASWARN (pclose);
+#elif defined GNULIB_POSIXCHECK
+# undef pclose
+# if HAVE_RAW_DECL_PCLOSE
+_GL_WARN_ON_USE (pclose, "pclose is unportable - "
+                 "use gnulib module pclose for more portability");
+# endif
+#endif
+
+#if @GNULIB_PERROR@
+/* Print a message to standard error, describing the value of ERRNO,
+   (if STRING is not NULL and not empty) prefixed with STRING and ": ",
+   and terminated with a newline.  */
+# if @REPLACE_PERROR@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define perror rpl_perror
+#  endif
+_GL_FUNCDECL_RPL (perror, void, (const char *string));
+_GL_CXXALIAS_RPL (perror, void, (const char *string));
+# else
+_GL_CXXALIAS_SYS (perror, void, (const char *string));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (perror);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef perror
+/* Assume perror is always declared.  */
+_GL_WARN_ON_USE (perror, "perror is not always POSIX compliant - "
+                 "use gnulib module perror for portability");
+#endif
+
+#if @GNULIB_POPEN@
+# if @REPLACE_POPEN@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef popen
+#   define popen rpl_popen
+#  endif
+_GL_FUNCDECL_RPL (popen, FILE *,
+                  (const char *cmd, const char *mode)
+                  _GL_ARG_NONNULL ((1, 2)) _GL_ATTRIBUTE_DEALLOC (pclose, 1));
+_GL_CXXALIAS_RPL (popen, FILE *, (const char *cmd, const char *mode));
+# else
+#  if !@HAVE_POPEN@ || __GNUC__ >= 11
+_GL_FUNCDECL_SYS (popen, FILE *,
+                  (const char *cmd, const char *mode)
+                  _GL_ARG_NONNULL ((1, 2)) _GL_ATTRIBUTE_DEALLOC (pclose, 1));
+#  endif
+_GL_CXXALIAS_SYS (popen, FILE *, (const char *cmd, const char *mode));
+# endif
+_GL_CXXALIASWARN (popen);
+#else
+# if @GNULIB_PCLOSE@ && __GNUC__ >= 11 && !defined popen
+/* For -Wmismatched-dealloc: Associate popen with pclose or rpl_pclose.  */
+_GL_FUNCDECL_SYS (popen, FILE *,
+                  (const char *cmd, const char *mode)
+                  _GL_ARG_NONNULL ((1, 2)) _GL_ATTRIBUTE_DEALLOC (pclose, 1));
+# endif
+# if defined GNULIB_POSIXCHECK
+#  undef popen
+#  if HAVE_RAW_DECL_POPEN
+_GL_WARN_ON_USE (popen, "popen is buggy on some platforms - "
+                 "use gnulib module popen or pipe for more portability");
+#  endif
+# endif
+#endif
+
+#if @GNULIB_PRINTF_POSIX@ || @GNULIB_PRINTF@
+# if (@GNULIB_PRINTF_POSIX@ && @REPLACE_PRINTF@) \
+     || (@GNULIB_PRINTF@ && @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@))
+#  if defined __GNUC__ || defined __clang__
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+/* Don't break __attribute__((format(printf,M,N))).  */
+#    define printf __printf__
+#   endif
+#   if @GNULIB_PRINTF_POSIX@ || @GNULIB_VFPRINTF_POSIX@
+_GL_FUNCDECL_RPL_1 (__printf__, int,
+                    (const char *restrict format, ...)
+                    __asm__ (@ASM_SYMBOL_PREFIX@
+                             _GL_STDIO_MACROEXPAND_AND_STRINGIZE(rpl_printf))
+                    _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (1, 2)
+                    _GL_ARG_NONNULL ((1)));
+#   else
+_GL_FUNCDECL_RPL_1 (__printf__, int,
+                    (const char *restrict format, ...)
+                    __asm__ (@ASM_SYMBOL_PREFIX@
+                             _GL_STDIO_MACROEXPAND_AND_STRINGIZE(rpl_printf))
+                    _GL_ATTRIBUTE_FORMAT_PRINTF_SYSTEM (1, 2)
+                    _GL_ARG_NONNULL ((1)));
+#   endif
+_GL_CXXALIAS_RPL_1 (printf, __printf__, int, (const char *format, ...));
+#  else
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    define printf rpl_printf
+#   endif
+_GL_FUNCDECL_RPL (printf, int,
+                  (const char *restrict format, ...)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (1, 2)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (printf, int, (const char *restrict format, ...));
+#  endif
+#  define GNULIB_overrides_printf 1
+# else
+_GL_CXXALIAS_SYS (printf, int, (const char *restrict format, ...));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (printf);
+# endif
+#endif
+#if !@GNULIB_PRINTF_POSIX@ && defined GNULIB_POSIXCHECK
+# if !GNULIB_overrides_printf
+#  undef printf
+# endif
+/* Assume printf is always declared.  */
+_GL_WARN_ON_USE (printf, "printf is not always POSIX compliant - "
+                 "use gnulib module printf-posix for portable "
+                 "POSIX compliance");
+#endif
+
+#if @GNULIB_PUTC@
+# if @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@)
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef putc
+#   define putc rpl_fputc
+#  endif
+_GL_FUNCDECL_RPL (fputc, int, (int c, FILE *stream) _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL_1 (putc, rpl_fputc, int, (int c, FILE *stream));
+# else
+_GL_CXXALIAS_SYS (putc, int, (int c, FILE *stream));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (putc);
+# endif
+#endif
+
+#if @GNULIB_PUTCHAR@
+# if @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@)
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef putchar
+#   define putchar rpl_putchar
+#  endif
+_GL_FUNCDECL_RPL (putchar, int, (int c));
+_GL_CXXALIAS_RPL (putchar, int, (int c));
+# else
+_GL_CXXALIAS_SYS (putchar, int, (int c));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (putchar);
+# endif
+#endif
+
+#if @GNULIB_PUTS@
+# if @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@)
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef puts
+#   define puts rpl_puts
+#  endif
+_GL_FUNCDECL_RPL (puts, int, (const char *string) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (puts, int, (const char *string));
+# else
+_GL_CXXALIAS_SYS (puts, int, (const char *string));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (puts);
+# endif
+#endif
+
+#if @GNULIB_MDA_PUTW@
+/* On native Windows, map 'putw' to '_putw', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::putw always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef putw
+#   define putw _putw
+#  endif
+_GL_CXXALIAS_MDA (putw, int, (int w, FILE *restrict stream));
+# else
+_GL_CXXALIAS_SYS (putw, int, (int w, FILE *restrict stream));
+# endif
+_GL_CXXALIASWARN (putw);
+#endif
+
+#if @GNULIB_REMOVE@
+# if @REPLACE_REMOVE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef remove
+#   define remove rpl_remove
+#  endif
+_GL_FUNCDECL_RPL (remove, int, (const char *name) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (remove, int, (const char *name));
+# else
+_GL_CXXALIAS_SYS (remove, int, (const char *name));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (remove);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef remove
+/* Assume remove is always declared.  */
+_GL_WARN_ON_USE (remove, "remove cannot handle directories on some platforms - "
+                 "use gnulib module remove for more portability");
+#endif
+
+#if @GNULIB_RENAME@
+# if @REPLACE_RENAME@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef rename
+#   define rename rpl_rename
+#  endif
+_GL_FUNCDECL_RPL (rename, int,
+                  (const char *old_filename, const char *new_filename)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (rename, int,
+                  (const char *old_filename, const char *new_filename));
+# else
+_GL_CXXALIAS_SYS (rename, int,
+                  (const char *old_filename, const char *new_filename));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (rename);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef rename
+/* Assume rename is always declared.  */
+_GL_WARN_ON_USE (rename, "rename is buggy on some platforms - "
+                 "use gnulib module rename for more portability");
+#endif
+
+#if @GNULIB_RENAMEAT@
+# if @REPLACE_RENAMEAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef renameat
+#   define renameat rpl_renameat
+#  endif
+_GL_FUNCDECL_RPL (renameat, int,
+                  (int fd1, char const *file1, int fd2, char const *file2)
+                  _GL_ARG_NONNULL ((2, 4)));
+_GL_CXXALIAS_RPL (renameat, int,
+                  (int fd1, char const *file1, int fd2, char const *file2));
+# else
+#  if !@HAVE_RENAMEAT@
+_GL_FUNCDECL_SYS (renameat, int,
+                  (int fd1, char const *file1, int fd2, char const *file2)
+                  _GL_ARG_NONNULL ((2, 4)));
+#  endif
+_GL_CXXALIAS_SYS (renameat, int,
+                  (int fd1, char const *file1, int fd2, char const *file2));
+# endif
+_GL_CXXALIASWARN (renameat);
+#elif defined GNULIB_POSIXCHECK
+# undef renameat
+# if HAVE_RAW_DECL_RENAMEAT
+_GL_WARN_ON_USE (renameat, "renameat is not portable - "
+                 "use gnulib module renameat for portability");
+# endif
+#endif
+
+#if @GNULIB_SCANF@
+# if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
+#  if defined __GNUC__ || defined __clang__
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    undef scanf
+/* Don't break __attribute__((format(scanf,M,N))).  */
+#    define scanf __scanf__
+#   endif
+_GL_FUNCDECL_RPL_1 (__scanf__, int,
+                    (const char *restrict format, ...)
+                    __asm__ (@ASM_SYMBOL_PREFIX@
+                             _GL_STDIO_MACROEXPAND_AND_STRINGIZE(rpl_scanf))
+                    _GL_ATTRIBUTE_FORMAT_SCANF_SYSTEM (1, 2)
+                    _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL_1 (scanf, __scanf__, int, (const char *restrict format, ...));
+#  else
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    undef scanf
+#    define scanf rpl_scanf
+#   endif
+_GL_FUNCDECL_RPL (scanf, int, (const char *restrict format, ...)
+                              _GL_ATTRIBUTE_FORMAT_SCANF_SYSTEM (1, 2)
+                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (scanf, int, (const char *restrict format, ...));
+#  endif
+# else
+_GL_CXXALIAS_SYS (scanf, int, (const char *restrict format, ...));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (scanf);
+# endif
+#endif
+
+#if @GNULIB_SNPRINTF@
+# if @REPLACE_SNPRINTF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define snprintf rpl_snprintf
+#  endif
+#  define GNULIB_overrides_snprintf 1
+_GL_FUNCDECL_RPL (snprintf, int,
+                  (char *restrict str, size_t size,
+                   const char *restrict format, ...)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (3, 4)
+                  _GL_ARG_NONNULL ((3)));
+_GL_CXXALIAS_RPL (snprintf, int,
+                  (char *restrict str, size_t size,
+                   const char *restrict format, ...));
+# else
+#  if !@HAVE_DECL_SNPRINTF@
+_GL_FUNCDECL_SYS (snprintf, int,
+                  (char *restrict str, size_t size,
+                   const char *restrict format, ...)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (3, 4)
+                  _GL_ARG_NONNULL ((3)));
+#  endif
+_GL_CXXALIAS_SYS (snprintf, int,
+                  (char *restrict str, size_t size,
+                   const char *restrict format, ...));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (snprintf);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef snprintf
+# if HAVE_RAW_DECL_SNPRINTF
+_GL_WARN_ON_USE (snprintf, "snprintf is unportable - "
+                 "use gnulib module snprintf for portability");
+# endif
+#endif
+
+/* Some people would argue that all sprintf uses should be warned about
+   (for example, OpenBSD issues a link warning for it),
+   since it can cause security holes due to buffer overruns.
+   However, we believe that sprintf can be used safely, and is more
+   efficient than snprintf in those safe cases; and as proof of our
+   belief, we use sprintf in several gnulib modules.  So this header
+   intentionally avoids adding a warning to sprintf except when
+   GNULIB_POSIXCHECK is defined.  */
+
+#if @GNULIB_SPRINTF_POSIX@
+# if @REPLACE_SPRINTF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define sprintf rpl_sprintf
+#  endif
+#  define GNULIB_overrides_sprintf 1
+_GL_FUNCDECL_RPL (sprintf, int,
+                  (char *restrict str, const char *restrict format, ...)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (2, 3)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (sprintf, int,
+                  (char *restrict str, const char *restrict format, ...));
+# else
+_GL_CXXALIAS_SYS (sprintf, int,
+                  (char *restrict str, const char *restrict format, ...));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (sprintf);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef sprintf
+/* Assume sprintf is always declared.  */
+_GL_WARN_ON_USE (sprintf, "sprintf is not always POSIX compliant - "
+                 "use gnulib module sprintf-posix for portable "
+                 "POSIX compliance");
+#endif
+
+#if @GNULIB_MDA_TEMPNAM@
+/* On native Windows, map 'tempnam' to '_tempnam', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::tempnam always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef tempnam
+#   define tempnam _tempnam
+#  endif
+_GL_CXXALIAS_MDA (tempnam, char *, (const char *dir, const char *prefix));
+# else
+_GL_CXXALIAS_SYS (tempnam, char *, (const char *dir, const char *prefix));
+# endif
+_GL_CXXALIASWARN (tempnam);
+#endif
+
+#if @GNULIB_TMPFILE@
+# if @REPLACE_TMPFILE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define tmpfile rpl_tmpfile
+#  endif
+_GL_FUNCDECL_RPL (tmpfile, FILE *, (void)
+                                   _GL_ATTRIBUTE_DEALLOC (fclose, 1));
+_GL_CXXALIAS_RPL (tmpfile, FILE *, (void));
+# else
+#  if __GNUC__ >= 11
+/* For -Wmismatched-dealloc: Associate tmpfile with fclose or rpl_fclose.  */
+_GL_FUNCDECL_SYS (tmpfile, FILE *, (void)
+                                   _GL_ATTRIBUTE_DEALLOC (fclose, 1));
+#  endif
+_GL_CXXALIAS_SYS (tmpfile, FILE *, (void));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (tmpfile);
+# endif
+#else
+# if @GNULIB_FCLOSE@ && __GNUC__ >= 11 && !defined tmpfile
+/* For -Wmismatched-dealloc: Associate tmpfile with fclose or rpl_fclose.  */
+_GL_FUNCDECL_SYS (tmpfile, FILE *, (void)
+                                   _GL_ATTRIBUTE_DEALLOC (fclose, 1));
+# endif
+# if defined GNULIB_POSIXCHECK
+#  undef tmpfile
+#  if HAVE_RAW_DECL_TMPFILE
+_GL_WARN_ON_USE (tmpfile, "tmpfile is not usable on mingw - "
+                 "use gnulib module tmpfile for portability");
+#  endif
+# endif
+#endif
+
+#if @GNULIB_VASPRINTF@
+/* Write formatted output to a string dynamically allocated with malloc().
+   If the memory allocation succeeds, store the address of the string in
+   *RESULT and return the number of resulting bytes, excluding the trailing
+   NUL.  Upon memory allocation error, or some other error, return -1.  */
+# if @REPLACE_VASPRINTF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define asprintf rpl_asprintf
+#  endif
+#  define GNULIB_overrides_asprintf
+_GL_FUNCDECL_RPL (asprintf, int,
+                  (char **result, const char *format, ...)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (2, 3)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (asprintf, int,
+                  (char **result, const char *format, ...));
+# else
+#  if !@HAVE_VASPRINTF@
+_GL_FUNCDECL_SYS (asprintf, int,
+                  (char **result, const char *format, ...)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (2, 3)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (asprintf, int,
+                  (char **result, const char *format, ...));
+# endif
+_GL_CXXALIASWARN (asprintf);
+# if @REPLACE_VASPRINTF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define vasprintf rpl_vasprintf
+#  endif
+#  define GNULIB_overrides_vasprintf 1
+_GL_FUNCDECL_RPL (vasprintf, int,
+                  (char **result, const char *format, va_list args)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (2, 0)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (vasprintf, int,
+                  (char **result, const char *format, va_list args));
+# else
+#  if !@HAVE_VASPRINTF@
+_GL_FUNCDECL_SYS (vasprintf, int,
+                  (char **result, const char *format, va_list args)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (2, 0)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (vasprintf, int,
+                  (char **result, const char *format, va_list args));
+# endif
+_GL_CXXALIASWARN (vasprintf);
+#endif
+
+#if @GNULIB_VDPRINTF@
+# if @REPLACE_VDPRINTF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define vdprintf rpl_vdprintf
+#  endif
+_GL_FUNCDECL_RPL (vdprintf, int,
+                  (int fd, const char *restrict format, va_list args)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (2, 0)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (vdprintf, int,
+                  (int fd, const char *restrict format, va_list args));
+# else
+#  if !@HAVE_VDPRINTF@
+_GL_FUNCDECL_SYS (vdprintf, int,
+                  (int fd, const char *restrict format, va_list args)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (2, 0)
+                  _GL_ARG_NONNULL ((2)));
+#  endif
+/* Need to cast, because on Solaris, the third parameter will likely be
+                                                    __va_list args.  */
+_GL_CXXALIAS_SYS_CAST (vdprintf, int,
+                       (int fd, const char *restrict format, va_list args));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (vdprintf);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef vdprintf
+# if HAVE_RAW_DECL_VDPRINTF
+_GL_WARN_ON_USE (vdprintf, "vdprintf is unportable - "
+                 "use gnulib module vdprintf for portability");
+# endif
+#endif
+
+#if @GNULIB_VFPRINTF_POSIX@ || @GNULIB_VFPRINTF@
+# if (@GNULIB_VFPRINTF_POSIX@ && @REPLACE_VFPRINTF@) \
+     || (@GNULIB_VFPRINTF@ && @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@))
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define vfprintf rpl_vfprintf
+#  endif
+#  define GNULIB_overrides_vfprintf 1
+#  if @GNULIB_VFPRINTF_POSIX@
+_GL_FUNCDECL_RPL (vfprintf, int,
+                  (FILE *restrict fp,
+                   const char *restrict format, va_list args)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (2, 0)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  else
+_GL_FUNCDECL_RPL (vfprintf, int,
+                  (FILE *restrict fp,
+                   const char *restrict format, va_list args)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_SYSTEM (2, 0)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_RPL (vfprintf, int,
+                  (FILE *restrict fp,
+                   const char *restrict format, va_list args));
+# else
+/* Need to cast, because on Solaris, the third parameter is
+                                                      __va_list args
+   and GCC's fixincludes did not change this to __gnuc_va_list.  */
+_GL_CXXALIAS_SYS_CAST (vfprintf, int,
+                       (FILE *restrict fp,
+                        const char *restrict format, va_list args));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (vfprintf);
+# endif
+#endif
+#if !@GNULIB_VFPRINTF_POSIX@ && defined GNULIB_POSIXCHECK
+# if !GNULIB_overrides_vfprintf
+#  undef vfprintf
+# endif
+/* Assume vfprintf is always declared.  */
+_GL_WARN_ON_USE (vfprintf, "vfprintf is not always POSIX compliant - "
+                 "use gnulib module vfprintf-posix for portable "
+                      "POSIX compliance");
+#endif
+
+#if @GNULIB_VFSCANF@
+# if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef vfscanf
+#   define vfscanf rpl_vfscanf
+#  endif
+_GL_FUNCDECL_RPL (vfscanf, int,
+                  (FILE *restrict stream,
+                   const char *restrict format, va_list args)
+                  _GL_ATTRIBUTE_FORMAT_SCANF_SYSTEM (2, 0)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (vfscanf, int,
+                  (FILE *restrict stream,
+                   const char *restrict format, va_list args));
+# else
+_GL_CXXALIAS_SYS (vfscanf, int,
+                  (FILE *restrict stream,
+                   const char *restrict format, va_list args));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (vfscanf);
+# endif
+#endif
+
+#if @GNULIB_VPRINTF_POSIX@ || @GNULIB_VPRINTF@
+# if (@GNULIB_VPRINTF_POSIX@ && @REPLACE_VPRINTF@) \
+     || (@GNULIB_VPRINTF@ && @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@))
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define vprintf rpl_vprintf
+#  endif
+#  define GNULIB_overrides_vprintf 1
+#  if @GNULIB_VPRINTF_POSIX@ || @GNULIB_VFPRINTF_POSIX@
+_GL_FUNCDECL_RPL (vprintf, int, (const char *restrict format, va_list args)
+                                _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (1, 0)
+                                _GL_ARG_NONNULL ((1)));
+#  else
+_GL_FUNCDECL_RPL (vprintf, int, (const char *restrict format, va_list args)
+                                _GL_ATTRIBUTE_FORMAT_PRINTF_SYSTEM (1, 0)
+                                _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_RPL (vprintf, int, (const char *restrict format, va_list args));
+# else
+/* Need to cast, because on Solaris, the second parameter is
+                                                          __va_list args
+   and GCC's fixincludes did not change this to __gnuc_va_list.  */
+_GL_CXXALIAS_SYS_CAST (vprintf, int,
+                       (const char *restrict format, va_list args));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (vprintf);
+# endif
+#endif
+#if !@GNULIB_VPRINTF_POSIX@ && defined GNULIB_POSIXCHECK
+# if !GNULIB_overrides_vprintf
+#  undef vprintf
+# endif
+/* Assume vprintf is always declared.  */
+_GL_WARN_ON_USE (vprintf, "vprintf is not always POSIX compliant - "
+                 "use gnulib module vprintf-posix for portable "
+                 "POSIX compliance");
+#endif
+
+#if @GNULIB_VSCANF@
+# if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef vscanf
+#   define vscanf rpl_vscanf
+#  endif
+_GL_FUNCDECL_RPL (vscanf, int, (const char *restrict format, va_list args)
+                               _GL_ATTRIBUTE_FORMAT_SCANF_SYSTEM (1, 0)
+                               _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (vscanf, int, (const char *restrict format, va_list args));
+# else
+_GL_CXXALIAS_SYS (vscanf, int, (const char *restrict format, va_list args));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (vscanf);
+# endif
+#endif
+
+#if @GNULIB_VSNPRINTF@
+# if @REPLACE_VSNPRINTF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define vsnprintf rpl_vsnprintf
+#  endif
+#  define GNULIB_overrides_vsnprintf 1
+_GL_FUNCDECL_RPL (vsnprintf, int,
+                  (char *restrict str, size_t size,
+                   const char *restrict format, va_list args)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (3, 0)
+                  _GL_ARG_NONNULL ((3)));
+_GL_CXXALIAS_RPL (vsnprintf, int,
+                  (char *restrict str, size_t size,
+                   const char *restrict format, va_list args));
+# else
+#  if !@HAVE_DECL_VSNPRINTF@
+_GL_FUNCDECL_SYS (vsnprintf, int,
+                  (char *restrict str, size_t size,
+                   const char *restrict format, va_list args)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (3, 0)
+                  _GL_ARG_NONNULL ((3)));
+#  endif
+_GL_CXXALIAS_SYS (vsnprintf, int,
+                  (char *restrict str, size_t size,
+                   const char *restrict format, va_list args));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (vsnprintf);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef vsnprintf
+# if HAVE_RAW_DECL_VSNPRINTF
+_GL_WARN_ON_USE (vsnprintf, "vsnprintf is unportable - "
+                 "use gnulib module vsnprintf for portability");
+# endif
+#endif
+
+#if @GNULIB_VSPRINTF_POSIX@
+# if @REPLACE_VSPRINTF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define vsprintf rpl_vsprintf
+#  endif
+#  define GNULIB_overrides_vsprintf 1
+_GL_FUNCDECL_RPL (vsprintf, int,
+                  (char *restrict str,
+                   const char *restrict format, va_list args)
+                  _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (2, 0)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (vsprintf, int,
+                  (char *restrict str,
+                   const char *restrict format, va_list args));
+# else
+/* Need to cast, because on Solaris, the third parameter is
+                                                       __va_list args
+   and GCC's fixincludes did not change this to __gnuc_va_list.  */
+_GL_CXXALIAS_SYS_CAST (vsprintf, int,
+                       (char *restrict str,
+                        const char *restrict format, va_list args));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (vsprintf);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef vsprintf
+/* Assume vsprintf is always declared.  */
+_GL_WARN_ON_USE (vsprintf, "vsprintf is not always POSIX compliant - "
+                 "use gnulib module vsprintf-posix for portable "
+                      "POSIX compliance");
+#endif
+
+#endif /* _@GUARD_PREFIX@_STDIO_H */
+#endif /* _@GUARD_PREFIX@_STDIO_H */
+#endif
diff --git a/src/grep/lib/stdlib.in.h b/src/grep/lib/stdlib.in.h
new file mode 100644
index 0000000..d86a880
--- /dev/null
+++ b/src/grep/lib/stdlib.in.h
@@ -0,0 +1,1517 @@
+/* A GNU-like <stdlib.h>.
+
+   Copyright (C) 1995, 2001-2004, 2006-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if defined __need_system_stdlib_h || defined __need_malloc_and_calloc
+/* Special invocation conventions inside some gnulib header files,
+   and inside some glibc header files, respectively.  */
+
+#@INCLUDE_NEXT@ @NEXT_STDLIB_H@
+
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_STDLIB_H
+
+/* The include_next requires a split double-inclusion guard.  */
+#@INCLUDE_NEXT@ @NEXT_STDLIB_H@
+
+#ifndef _@GUARD_PREFIX@_STDLIB_H
+#define _@GUARD_PREFIX@_STDLIB_H
+
+/* NetBSD 5.0 mis-defines NULL.  */
+#include <stddef.h>
+
+/* MirBSD 10 defines WEXITSTATUS in <sys/wait.h>, not in <stdlib.h>.  */
+#if @GNULIB_SYSTEM_POSIX@ && !defined WEXITSTATUS
+# include <sys/wait.h>
+#endif
+
+/* Solaris declares getloadavg() in <sys/loadavg.h>.  */
+#if (@GNULIB_GETLOADAVG@ || defined GNULIB_POSIXCHECK) && @HAVE_SYS_LOADAVG_H@
+/* OpenIndiana has a bug: <sys/time.h> must be included before
+   <sys/loadavg.h>.  */
+# include <sys/time.h>
+# include <sys/loadavg.h>
+#endif
+
+/* Native Windows platforms declare _mktemp() in <io.h>.  */
+#if defined _WIN32 && !defined __CYGWIN__
+# include <io.h>
+#endif
+
+#if @GNULIB_RANDOM_R@
+
+/* OSF/1 5.1 declares 'struct random_data' in <random.h>, which is included
+   from <stdlib.h> if _REENTRANT is defined.  Include it whenever we need
+   'struct random_data'.  */
+# if @HAVE_RANDOM_H@
+#  include <random.h>
+# endif
+
+# if !@HAVE_STRUCT_RANDOM_DATA@ || @REPLACE_RANDOM_R@ || !@HAVE_RANDOM_R@
+#  include <stdint.h>
+# endif
+
+# if !@HAVE_STRUCT_RANDOM_DATA@
+/* Define 'struct random_data'.
+   But allow multiple gnulib generated <stdlib.h> replacements to coexist.  */
+#  if !GNULIB_defined_struct_random_data
+struct random_data
+{
+  int32_t *fptr;                /* Front pointer.  */
+  int32_t *rptr;                /* Rear pointer.  */
+  int32_t *state;               /* Array of state values.  */
+  int rand_type;                /* Type of random number generator.  */
+  int rand_deg;                 /* Degree of random number generator.  */
+  int rand_sep;                 /* Distance between front and rear.  */
+  int32_t *end_ptr;             /* Pointer behind state table.  */
+};
+#   define GNULIB_defined_struct_random_data 1
+#  endif
+# endif
+#endif
+
+#if (@GNULIB_MKSTEMP@ || @GNULIB_MKSTEMPS@ || @GNULIB_MKOSTEMP@ || @GNULIB_MKOSTEMPS@ || @GNULIB_GETSUBOPT@ || defined GNULIB_POSIXCHECK) && ! defined __GLIBC__ && !(defined _WIN32 && ! defined __CYGWIN__)
+/* On Mac OS X 10.3, only <unistd.h> declares mkstemp.  */
+/* On Mac OS X 10.5, only <unistd.h> declares mkstemps.  */
+/* On Mac OS X 10.13, only <unistd.h> declares mkostemp and mkostemps.  */
+/* On Cygwin 1.7.1, only <unistd.h> declares getsubopt.  */
+/* But avoid namespace pollution on glibc systems and native Windows.  */
+# include <unistd.h>
+#endif
+
+/* The __attribute__ feature is available in gcc versions 2.5 and later.
+   The attribute __pure__ was added in gcc 2.96.  */
+#ifndef _GL_ATTRIBUTE_PURE
+# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96) || defined __clang__
+#  define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+# else
+#  define _GL_ATTRIBUTE_PURE /* empty */
+# endif
+#endif
+
+/* The definition of _Noreturn is copied here.  */
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+
+/* Some systems do not define EXIT_*, despite otherwise supporting C89.  */
+#ifndef EXIT_SUCCESS
+# define EXIT_SUCCESS 0
+#endif
+/* Tandem/NSK and other platforms that define EXIT_FAILURE as -1 interfere
+   with proper operation of xargs.  */
+#ifndef EXIT_FAILURE
+# define EXIT_FAILURE 1
+#elif EXIT_FAILURE != 1
+# undef EXIT_FAILURE
+# define EXIT_FAILURE 1
+#endif
+
+
+#if @GNULIB__EXIT@
+/* Terminate the current process with the given return code, without running
+   the 'atexit' handlers.  */
+# if !@HAVE__EXIT@
+_GL_FUNCDECL_SYS (_Exit, _Noreturn void, (int status));
+# endif
+_GL_CXXALIAS_SYS (_Exit, void, (int status));
+_GL_CXXALIASWARN (_Exit);
+#elif defined GNULIB_POSIXCHECK
+# undef _Exit
+# if HAVE_RAW_DECL__EXIT
+_GL_WARN_ON_USE (_Exit, "_Exit is unportable - "
+                 "use gnulib module _Exit for portability");
+# endif
+#endif
+
+
+#if @GNULIB_FREE_POSIX@
+# if @REPLACE_FREE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef free
+#   define free rpl_free
+#  endif
+_GL_FUNCDECL_RPL (free, void, (void *ptr));
+_GL_CXXALIAS_RPL (free, void, (void *ptr));
+# else
+_GL_CXXALIAS_SYS (free, void, (void *ptr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (free);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef free
+/* Assume free is always declared.  */
+_GL_WARN_ON_USE (free, "free is not future POSIX compliant everywhere - "
+                 "use gnulib module free for portability");
+#endif
+
+
+/* Allocate memory with indefinite extent and specified alignment.  */
+#if @GNULIB_ALIGNED_ALLOC@
+# if @REPLACE_ALIGNED_ALLOC@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef aligned_alloc
+#   define aligned_alloc rpl_aligned_alloc
+#  endif
+_GL_FUNCDECL_RPL (aligned_alloc, void *,
+                  (size_t alignment, size_t size)
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+_GL_CXXALIAS_RPL (aligned_alloc, void *, (size_t alignment, size_t size));
+# else
+#  if @HAVE_ALIGNED_ALLOC@
+#   if __GNUC__ >= 11
+/* For -Wmismatched-dealloc: Associate aligned_alloc with free or rpl_free.  */
+_GL_FUNCDECL_SYS (aligned_alloc, void *,
+                  (size_t alignment, size_t size)
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+#   endif
+_GL_CXXALIAS_SYS (aligned_alloc, void *, (size_t alignment, size_t size));
+#  endif
+# endif
+# if @HAVE_ALIGNED_ALLOC@
+_GL_CXXALIASWARN (aligned_alloc);
+# endif
+#else
+# if @GNULIB_FREE_POSIX@ && __GNUC__ >= 11 && !defined aligned_alloc
+/* For -Wmismatched-dealloc: Associate aligned_alloc with free or rpl_free.  */
+_GL_FUNCDECL_SYS (aligned_alloc, void *,
+                  (size_t alignment, size_t size)
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+# endif
+# if defined GNULIB_POSIXCHECK
+#  undef aligned_alloc
+#  if HAVE_RAW_DECL_ALIGNED_ALLOC
+_GL_WARN_ON_USE (aligned_alloc, "aligned_alloc is not portable - "
+                 "use gnulib module aligned_alloc for portability");
+#  endif
+# endif
+#endif
+
+#if @GNULIB_ATOLL@
+/* Parse a signed decimal integer.
+   Returns the value of the integer.  Errors are not detected.  */
+# if !@HAVE_ATOLL@
+_GL_FUNCDECL_SYS (atoll, long long, (const char *string)
+                                    _GL_ATTRIBUTE_PURE
+                                    _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (atoll, long long, (const char *string));
+_GL_CXXALIASWARN (atoll);
+#elif defined GNULIB_POSIXCHECK
+# undef atoll
+# if HAVE_RAW_DECL_ATOLL
+_GL_WARN_ON_USE (atoll, "atoll is unportable - "
+                 "use gnulib module atoll for portability");
+# endif
+#endif
+
+#if @GNULIB_CALLOC_POSIX@
+# if @REPLACE_CALLOC@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef calloc
+#   define calloc rpl_calloc
+#  endif
+_GL_FUNCDECL_RPL (calloc, void *,
+                  (size_t nmemb, size_t size)
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+_GL_CXXALIAS_RPL (calloc, void *, (size_t nmemb, size_t size));
+# else
+#  if __GNUC__ >= 11
+/* For -Wmismatched-dealloc: Associate calloc with free or rpl_free.  */
+_GL_FUNCDECL_SYS (calloc, void *,
+                  (size_t nmemb, size_t size)
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+#  endif
+_GL_CXXALIAS_SYS (calloc, void *, (size_t nmemb, size_t size));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (calloc);
+# endif
+#else
+# if @GNULIB_FREE_POSIX@ && __GNUC__ >= 11 && !defined calloc
+/* For -Wmismatched-dealloc: Associate calloc with free or rpl_free.  */
+_GL_FUNCDECL_SYS (calloc, void *,
+                  (size_t nmemb, size_t size)
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+# endif
+# if defined GNULIB_POSIXCHECK
+#  undef calloc
+/* Assume calloc is always declared.  */
+_GL_WARN_ON_USE (calloc, "calloc is not POSIX compliant everywhere - "
+                 "use gnulib module calloc-posix for portability");
+# endif
+#endif
+
+#if @GNULIB_CANONICALIZE_FILE_NAME@
+# if @REPLACE_CANONICALIZE_FILE_NAME@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define canonicalize_file_name rpl_canonicalize_file_name
+#  endif
+_GL_FUNCDECL_RPL (canonicalize_file_name, char *,
+                  (const char *name)
+                  _GL_ARG_NONNULL ((1))
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+_GL_CXXALIAS_RPL (canonicalize_file_name, char *, (const char *name));
+# else
+#  if !@HAVE_CANONICALIZE_FILE_NAME@ || __GNUC__ >= 11
+_GL_FUNCDECL_SYS (canonicalize_file_name, char *,
+                  (const char *name)
+                  _GL_ARG_NONNULL ((1))
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+#  endif
+_GL_CXXALIAS_SYS (canonicalize_file_name, char *, (const char *name));
+# endif
+# ifndef GNULIB_defined_canonicalize_file_name
+#  define GNULIB_defined_canonicalize_file_name \
+     (!@HAVE_CANONICALIZE_FILE_NAME@ || @REPLACE_CANONICALIZE_FILE_NAME@)
+# endif
+_GL_CXXALIASWARN (canonicalize_file_name);
+#else
+# if @GNULIB_FREE_POSIX@ && __GNUC__ >= 11 && !defined canonicalize_file_name
+/* For -Wmismatched-dealloc: Associate canonicalize_file_name with free or
+   rpl_free.  */
+_GL_FUNCDECL_SYS (canonicalize_file_name, char *,
+                  (const char *name)
+                  _GL_ARG_NONNULL ((1))
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+# endif
+# if defined GNULIB_POSIXCHECK
+#  undef canonicalize_file_name
+#  if HAVE_RAW_DECL_CANONICALIZE_FILE_NAME
+_GL_WARN_ON_USE (canonicalize_file_name,
+                 "canonicalize_file_name is unportable - "
+                 "use gnulib module canonicalize-lgpl for portability");
+#  endif
+# endif
+#endif
+
+#if @GNULIB_MDA_ECVT@
+/* On native Windows, map 'ecvt' to '_ecvt', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::ecvt on all platforms that have
+   it.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef ecvt
+#   define ecvt _ecvt
+#  endif
+_GL_CXXALIAS_MDA (ecvt, char *,
+                  (double number, int ndigits, int *decptp, int *signp));
+# else
+#  if @HAVE_DECL_ECVT@
+_GL_CXXALIAS_SYS (ecvt, char *,
+                  (double number, int ndigits, int *decptp, int *signp));
+#  endif
+# endif
+# if (defined _WIN32 && !defined __CYGWIN__) || @HAVE_DECL_ECVT@
+_GL_CXXALIASWARN (ecvt);
+# endif
+#endif
+
+#if @GNULIB_MDA_FCVT@
+/* On native Windows, map 'fcvt' to '_fcvt', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::fcvt on all platforms that have
+   it.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fcvt
+#   define fcvt _fcvt
+#  endif
+_GL_CXXALIAS_MDA (fcvt, char *,
+                  (double number, int ndigits, int *decptp, int *signp));
+# else
+#  if @HAVE_DECL_FCVT@
+_GL_CXXALIAS_SYS (fcvt, char *,
+                  (double number, int ndigits, int *decptp, int *signp));
+#  endif
+# endif
+# if (defined _WIN32 && !defined __CYGWIN__) || @HAVE_DECL_FCVT@
+_GL_CXXALIASWARN (fcvt);
+# endif
+#endif
+
+#if @GNULIB_MDA_GCVT@
+/* On native Windows, map 'gcvt' to '_gcvt', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::gcvt on all platforms that have
+   it.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef gcvt
+#   define gcvt _gcvt
+#  endif
+_GL_CXXALIAS_MDA (gcvt, char *, (double number, int ndigits, char *buf));
+# else
+#  if @HAVE_DECL_GCVT@
+_GL_CXXALIAS_SYS (gcvt, char *, (double number, int ndigits, char *buf));
+#  endif
+# endif
+# if (defined _WIN32 && !defined __CYGWIN__) || @HAVE_DECL_GCVT@
+_GL_CXXALIASWARN (gcvt);
+# endif
+#endif
+
+#if @GNULIB_GETLOADAVG@
+/* Store max(NELEM,3) load average numbers in LOADAVG[].
+   The three numbers are the load average of the last 1 minute, the last 5
+   minutes, and the last 15 minutes, respectively.
+   LOADAVG is an array of NELEM numbers.  */
+# if !@HAVE_DECL_GETLOADAVG@
+_GL_FUNCDECL_SYS (getloadavg, int, (double loadavg[], int nelem)
+                                   _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (getloadavg, int, (double loadavg[], int nelem));
+_GL_CXXALIASWARN (getloadavg);
+#elif defined GNULIB_POSIXCHECK
+# undef getloadavg
+# if HAVE_RAW_DECL_GETLOADAVG
+_GL_WARN_ON_USE (getloadavg, "getloadavg is not portable - "
+                 "use gnulib module getloadavg for portability");
+# endif
+#endif
+
+#if @GNULIB_GETSUBOPT@
+/* Assuming *OPTIONP is a comma separated list of elements of the form
+   "token" or "token=value", getsubopt parses the first of these elements.
+   If the first element refers to a "token" that is member of the given
+   NULL-terminated array of tokens:
+     - It replaces the comma with a NUL byte, updates *OPTIONP to point past
+       the first option and the comma, sets *VALUEP to the value of the
+       element (or NULL if it doesn't contain an "=" sign),
+     - It returns the index of the "token" in the given array of tokens.
+   Otherwise it returns -1, and *OPTIONP and *VALUEP are undefined.
+   For more details see the POSIX specification.
+   https://pubs.opengroup.org/onlinepubs/9699919799/functions/getsubopt.html */
+# if !@HAVE_GETSUBOPT@
+_GL_FUNCDECL_SYS (getsubopt, int,
+                  (char **optionp, char *const *tokens, char **valuep)
+                  _GL_ARG_NONNULL ((1, 2, 3)));
+# endif
+_GL_CXXALIAS_SYS (getsubopt, int,
+                  (char **optionp, char *const *tokens, char **valuep));
+_GL_CXXALIASWARN (getsubopt);
+#elif defined GNULIB_POSIXCHECK
+# undef getsubopt
+# if HAVE_RAW_DECL_GETSUBOPT
+_GL_WARN_ON_USE (getsubopt, "getsubopt is unportable - "
+                 "use gnulib module getsubopt for portability");
+# endif
+#endif
+
+#if @GNULIB_GRANTPT@
+/* Change the ownership and access permission of the slave side of the
+   pseudo-terminal whose master side is specified by FD.  */
+# if !@HAVE_GRANTPT@
+_GL_FUNCDECL_SYS (grantpt, int, (int fd));
+# endif
+_GL_CXXALIAS_SYS (grantpt, int, (int fd));
+_GL_CXXALIASWARN (grantpt);
+#elif defined GNULIB_POSIXCHECK
+# undef grantpt
+# if HAVE_RAW_DECL_GRANTPT
+_GL_WARN_ON_USE (grantpt, "grantpt is not portable - "
+                 "use gnulib module grantpt for portability");
+# endif
+#endif
+
+/* If _GL_USE_STDLIB_ALLOC is nonzero, the including module does not
+   rely on GNU or POSIX semantics for malloc and realloc (for example,
+   by never specifying a zero size), so it does not need malloc or
+   realloc to be redefined.  */
+#if @GNULIB_MALLOC_POSIX@
+# if @REPLACE_MALLOC@
+#  if !((defined __cplusplus && defined GNULIB_NAMESPACE) \
+        || _GL_USE_STDLIB_ALLOC)
+#   undef malloc
+#   define malloc rpl_malloc
+#  endif
+_GL_FUNCDECL_RPL (malloc, void *,
+                  (size_t size)
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+_GL_CXXALIAS_RPL (malloc, void *, (size_t size));
+# else
+#  if __GNUC__ >= 11
+/* For -Wmismatched-dealloc: Associate malloc with free or rpl_free.  */
+_GL_FUNCDECL_SYS (malloc, void *,
+                  (size_t size)
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+#  endif
+_GL_CXXALIAS_SYS (malloc, void *, (size_t size));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (malloc);
+# endif
+#else
+# if @GNULIB_FREE_POSIX@ && __GNUC__ >= 11 && !defined malloc
+/* For -Wmismatched-dealloc: Associate malloc with free or rpl_free.  */
+_GL_FUNCDECL_SYS (malloc, void *,
+                  (size_t size)
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+# endif
+# if defined GNULIB_POSIXCHECK && !_GL_USE_STDLIB_ALLOC
+#  undef malloc
+/* Assume malloc is always declared.  */
+_GL_WARN_ON_USE (malloc, "malloc is not POSIX compliant everywhere - "
+                 "use gnulib module malloc-posix for portability");
+# endif
+#endif
+
+/* Convert a multibyte character to a wide character.  */
+#if @GNULIB_MBTOWC@
+# if @REPLACE_MBTOWC@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mbtowc
+#   define mbtowc rpl_mbtowc
+#  endif
+_GL_FUNCDECL_RPL (mbtowc, int,
+                  (wchar_t *restrict pwc, const char *restrict s, size_t n));
+_GL_CXXALIAS_RPL (mbtowc, int,
+                  (wchar_t *restrict pwc, const char *restrict s, size_t n));
+# else
+#  if !@HAVE_MBTOWC@
+_GL_FUNCDECL_SYS (mbtowc, int,
+                  (wchar_t *restrict pwc, const char *restrict s, size_t n));
+#  endif
+_GL_CXXALIAS_SYS (mbtowc, int,
+                  (wchar_t *restrict pwc, const char *restrict s, size_t n));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (mbtowc);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef mbtowc
+# if HAVE_RAW_DECL_MBTOWC
+_GL_WARN_ON_USE (mbtowc, "mbtowc is not portable - "
+                 "use gnulib module mbtowc for portability");
+# endif
+#endif
+
+#if @GNULIB_MKDTEMP@
+/* Create a unique temporary directory from TEMPLATE.
+   The last six characters of TEMPLATE must be "XXXXXX";
+   they are replaced with a string that makes the directory name unique.
+   Returns TEMPLATE, or a null pointer if it cannot get a unique name.
+   The directory is created mode 700.  */
+# if !@HAVE_MKDTEMP@
+_GL_FUNCDECL_SYS (mkdtemp, char *, (char * /*template*/) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (mkdtemp, char *, (char * /*template*/));
+_GL_CXXALIASWARN (mkdtemp);
+#elif defined GNULIB_POSIXCHECK
+# undef mkdtemp
+# if HAVE_RAW_DECL_MKDTEMP
+_GL_WARN_ON_USE (mkdtemp, "mkdtemp is unportable - "
+                 "use gnulib module mkdtemp for portability");
+# endif
+#endif
+
+#if @GNULIB_MKOSTEMP@
+/* Create a unique temporary file from TEMPLATE.
+   The last six characters of TEMPLATE must be "XXXXXX";
+   they are replaced with a string that makes the file name unique.
+   The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
+   and O_TEXT, O_BINARY (defined in "binary-io.h").
+   The file is then created, with the specified flags, ensuring it didn't exist
+   before.
+   The file is created read-write (mask at least 0600 & ~umask), but it may be
+   world-readable and world-writable (mask 0666 & ~umask), depending on the
+   implementation.
+   Returns the open file descriptor if successful, otherwise -1 and errno
+   set.  */
+# if !@HAVE_MKOSTEMP@
+_GL_FUNCDECL_SYS (mkostemp, int, (char * /*template*/, int /*flags*/)
+                                 _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (mkostemp, int, (char * /*template*/, int /*flags*/));
+_GL_CXXALIASWARN (mkostemp);
+#elif defined GNULIB_POSIXCHECK
+# undef mkostemp
+# if HAVE_RAW_DECL_MKOSTEMP
+_GL_WARN_ON_USE (mkostemp, "mkostemp is unportable - "
+                 "use gnulib module mkostemp for portability");
+# endif
+#endif
+
+#if @GNULIB_MKOSTEMPS@
+/* Create a unique temporary file from TEMPLATE.
+   The last six characters of TEMPLATE before a suffix of length
+   SUFFIXLEN must be "XXXXXX";
+   they are replaced with a string that makes the file name unique.
+   The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
+   and O_TEXT, O_BINARY (defined in "binary-io.h").
+   The file is then created, with the specified flags, ensuring it didn't exist
+   before.
+   The file is created read-write (mask at least 0600 & ~umask), but it may be
+   world-readable and world-writable (mask 0666 & ~umask), depending on the
+   implementation.
+   Returns the open file descriptor if successful, otherwise -1 and errno
+   set.  */
+# if !@HAVE_MKOSTEMPS@
+_GL_FUNCDECL_SYS (mkostemps, int,
+                  (char * /*template*/, int /*suffixlen*/, int /*flags*/)
+                  _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (mkostemps, int,
+                  (char * /*template*/, int /*suffixlen*/, int /*flags*/));
+_GL_CXXALIASWARN (mkostemps);
+#elif defined GNULIB_POSIXCHECK
+# undef mkostemps
+# if HAVE_RAW_DECL_MKOSTEMPS
+_GL_WARN_ON_USE (mkostemps, "mkostemps is unportable - "
+                 "use gnulib module mkostemps for portability");
+# endif
+#endif
+
+#if @GNULIB_MKSTEMP@
+/* Create a unique temporary file from TEMPLATE.
+   The last six characters of TEMPLATE must be "XXXXXX";
+   they are replaced with a string that makes the file name unique.
+   The file is then created, ensuring it didn't exist before.
+   The file is created read-write (mask at least 0600 & ~umask), but it may be
+   world-readable and world-writable (mask 0666 & ~umask), depending on the
+   implementation.
+   Returns the open file descriptor if successful, otherwise -1 and errno
+   set.  */
+# if @REPLACE_MKSTEMP@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define mkstemp rpl_mkstemp
+#  endif
+_GL_FUNCDECL_RPL (mkstemp, int, (char * /*template*/) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (mkstemp, int, (char * /*template*/));
+# else
+#  if ! @HAVE_MKSTEMP@
+_GL_FUNCDECL_SYS (mkstemp, int, (char * /*template*/) _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (mkstemp, int, (char * /*template*/));
+# endif
+_GL_CXXALIASWARN (mkstemp);
+#elif defined GNULIB_POSIXCHECK
+# undef mkstemp
+# if HAVE_RAW_DECL_MKSTEMP
+_GL_WARN_ON_USE (mkstemp, "mkstemp is unportable - "
+                 "use gnulib module mkstemp for portability");
+# endif
+#endif
+
+#if @GNULIB_MKSTEMPS@
+/* Create a unique temporary file from TEMPLATE.
+   The last six characters of TEMPLATE prior to a suffix of length
+   SUFFIXLEN must be "XXXXXX";
+   they are replaced with a string that makes the file name unique.
+   The file is then created, ensuring it didn't exist before.
+   The file is created read-write (mask at least 0600 & ~umask), but it may be
+   world-readable and world-writable (mask 0666 & ~umask), depending on the
+   implementation.
+   Returns the open file descriptor if successful, otherwise -1 and errno
+   set.  */
+# if !@HAVE_MKSTEMPS@
+_GL_FUNCDECL_SYS (mkstemps, int, (char * /*template*/, int /*suffixlen*/)
+                                 _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (mkstemps, int, (char * /*template*/, int /*suffixlen*/));
+_GL_CXXALIASWARN (mkstemps);
+#elif defined GNULIB_POSIXCHECK
+# undef mkstemps
+# if HAVE_RAW_DECL_MKSTEMPS
+_GL_WARN_ON_USE (mkstemps, "mkstemps is unportable - "
+                 "use gnulib module mkstemps for portability");
+# endif
+#endif
+
+#if @GNULIB_MDA_MKTEMP@
+/* On native Windows, map 'mktemp' to '_mktemp', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::mktemp always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mktemp
+#   define mktemp _mktemp
+#  endif
+_GL_CXXALIAS_MDA (mktemp, char *, (char * /*template*/));
+# else
+_GL_CXXALIAS_SYS (mktemp, char *, (char * /*template*/));
+# endif
+_GL_CXXALIASWARN (mktemp);
+#endif
+
+/* Allocate memory with indefinite extent and specified alignment.  */
+#if @GNULIB_POSIX_MEMALIGN@
+# if @REPLACE_POSIX_MEMALIGN@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef posix_memalign
+#   define posix_memalign rpl_posix_memalign
+#  endif
+_GL_FUNCDECL_RPL (posix_memalign, int,
+                  (void **memptr, size_t alignment, size_t size)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (posix_memalign, int,
+                  (void **memptr, size_t alignment, size_t size));
+# else
+#  if @HAVE_POSIX_MEMALIGN@
+_GL_CXXALIAS_SYS (posix_memalign, int,
+                  (void **memptr, size_t alignment, size_t size));
+#  endif
+# endif
+# if @HAVE_POSIX_MEMALIGN@
+_GL_CXXALIASWARN (posix_memalign);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef posix_memalign
+# if HAVE_RAW_DECL_POSIX_MEMALIGN
+_GL_WARN_ON_USE (posix_memalign, "posix_memalign is not portable - "
+                 "use gnulib module posix_memalign for portability");
+# endif
+#endif
+
+#if @GNULIB_POSIX_OPENPT@
+/* Return an FD open to the master side of a pseudo-terminal.  Flags should
+   include O_RDWR, and may also include O_NOCTTY.  */
+# if !@HAVE_POSIX_OPENPT@
+_GL_FUNCDECL_SYS (posix_openpt, int, (int flags));
+# endif
+_GL_CXXALIAS_SYS (posix_openpt, int, (int flags));
+_GL_CXXALIASWARN (posix_openpt);
+#elif defined GNULIB_POSIXCHECK
+# undef posix_openpt
+# if HAVE_RAW_DECL_POSIX_OPENPT
+_GL_WARN_ON_USE (posix_openpt, "posix_openpt is not portable - "
+                 "use gnulib module posix_openpt for portability");
+# endif
+#endif
+
+#if @GNULIB_PTSNAME@
+/* Return the pathname of the pseudo-terminal slave associated with
+   the master FD is open on, or NULL on errors.  */
+# if @REPLACE_PTSNAME@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef ptsname
+#   define ptsname rpl_ptsname
+#  endif
+_GL_FUNCDECL_RPL (ptsname, char *, (int fd));
+_GL_CXXALIAS_RPL (ptsname, char *, (int fd));
+# else
+#  if !@HAVE_PTSNAME@
+_GL_FUNCDECL_SYS (ptsname, char *, (int fd));
+#  endif
+_GL_CXXALIAS_SYS (ptsname, char *, (int fd));
+# endif
+_GL_CXXALIASWARN (ptsname);
+#elif defined GNULIB_POSIXCHECK
+# undef ptsname
+# if HAVE_RAW_DECL_PTSNAME
+_GL_WARN_ON_USE (ptsname, "ptsname is not portable - "
+                 "use gnulib module ptsname for portability");
+# endif
+#endif
+
+#if @GNULIB_PTSNAME_R@
+/* Set the pathname of the pseudo-terminal slave associated with
+   the master FD is open on and return 0, or set errno and return
+   non-zero on errors.  */
+# if @REPLACE_PTSNAME_R@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef ptsname_r
+#   define ptsname_r rpl_ptsname_r
+#  endif
+_GL_FUNCDECL_RPL (ptsname_r, int, (int fd, char *buf, size_t len));
+_GL_CXXALIAS_RPL (ptsname_r, int, (int fd, char *buf, size_t len));
+# else
+#  if !@HAVE_PTSNAME_R@
+_GL_FUNCDECL_SYS (ptsname_r, int, (int fd, char *buf, size_t len));
+#  endif
+_GL_CXXALIAS_SYS (ptsname_r, int, (int fd, char *buf, size_t len));
+# endif
+# ifndef GNULIB_defined_ptsname_r
+#  define GNULIB_defined_ptsname_r (!@HAVE_PTSNAME_R@ || @REPLACE_PTSNAME_R@)
+# endif
+_GL_CXXALIASWARN (ptsname_r);
+#elif defined GNULIB_POSIXCHECK
+# undef ptsname_r
+# if HAVE_RAW_DECL_PTSNAME_R
+_GL_WARN_ON_USE (ptsname_r, "ptsname_r is not portable - "
+                 "use gnulib module ptsname_r for portability");
+# endif
+#endif
+
+#if @GNULIB_PUTENV@
+# if @REPLACE_PUTENV@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef putenv
+#   define putenv rpl_putenv
+#  endif
+_GL_FUNCDECL_RPL (putenv, int, (char *string) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (putenv, int, (char *string));
+# elif defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef putenv
+#   define putenv _putenv
+#  endif
+_GL_CXXALIAS_MDA (putenv, int, (char *string));
+# else
+_GL_CXXALIAS_SYS (putenv, int, (char *string));
+# endif
+_GL_CXXALIASWARN (putenv);
+#elif @GNULIB_MDA_PUTENV@
+/* On native Windows, map 'putenv' to '_putenv', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::putenv always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef putenv
+#   define putenv _putenv
+#  endif
+/* Need to cast, because on mingw, the parameter is either
+   'const char *string' or 'char *string'.  */
+_GL_CXXALIAS_MDA_CAST (putenv, int, (char *string));
+# else
+_GL_CXXALIAS_SYS (putenv, int, (char *string));
+# endif
+_GL_CXXALIASWARN (putenv);
+#endif
+
+#if @GNULIB_QSORT_R@
+/* Sort an array of NMEMB elements, starting at address BASE, each element
+   occupying SIZE bytes, in ascending order according to the comparison
+   function COMPARE.  */
+# if @REPLACE_QSORT_R@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef qsort_r
+#   define qsort_r rpl_qsort_r
+#  endif
+_GL_FUNCDECL_RPL (qsort_r, void, (void *base, size_t nmemb, size_t size,
+                                  int (*compare) (void const *, void const *,
+                                                  void *),
+                                  void *arg) _GL_ARG_NONNULL ((1, 4)));
+_GL_CXXALIAS_RPL (qsort_r, void, (void *base, size_t nmemb, size_t size,
+                                  int (*compare) (void const *, void const *,
+                                                  void *),
+                                  void *arg));
+# else
+#  if !@HAVE_QSORT_R@
+_GL_FUNCDECL_SYS (qsort_r, void, (void *base, size_t nmemb, size_t size,
+                                  int (*compare) (void const *, void const *,
+                                                  void *),
+                                  void *arg) _GL_ARG_NONNULL ((1, 4)));
+#  endif
+_GL_CXXALIAS_SYS (qsort_r, void, (void *base, size_t nmemb, size_t size,
+                                  int (*compare) (void const *, void const *,
+                                                  void *),
+                                  void *arg));
+# endif
+_GL_CXXALIASWARN (qsort_r);
+#elif defined GNULIB_POSIXCHECK
+# undef qsort_r
+# if HAVE_RAW_DECL_QSORT_R
+_GL_WARN_ON_USE (qsort_r, "qsort_r is not portable - "
+                 "use gnulib module qsort_r for portability");
+# endif
+#endif
+
+
+#if @GNULIB_RANDOM_R@
+# if !@HAVE_RANDOM_R@
+#  ifndef RAND_MAX
+#   define RAND_MAX 2147483647
+#  endif
+# endif
+#endif
+
+
+#if @GNULIB_RANDOM@
+# if @REPLACE_RANDOM@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef random
+#   define random rpl_random
+#  endif
+_GL_FUNCDECL_RPL (random, long, (void));
+_GL_CXXALIAS_RPL (random, long, (void));
+# else
+#  if !@HAVE_RANDOM@
+_GL_FUNCDECL_SYS (random, long, (void));
+#  endif
+/* Need to cast, because on Haiku, the return type is
+                               int.  */
+_GL_CXXALIAS_SYS_CAST (random, long, (void));
+# endif
+_GL_CXXALIASWARN (random);
+#elif defined GNULIB_POSIXCHECK
+# undef random
+# if HAVE_RAW_DECL_RANDOM
+_GL_WARN_ON_USE (random, "random is unportable - "
+                 "use gnulib module random for portability");
+# endif
+#endif
+
+#if @GNULIB_RANDOM@
+# if @REPLACE_RANDOM@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef srandom
+#   define srandom rpl_srandom
+#  endif
+_GL_FUNCDECL_RPL (srandom, void, (unsigned int seed));
+_GL_CXXALIAS_RPL (srandom, void, (unsigned int seed));
+# else
+#  if !@HAVE_RANDOM@
+_GL_FUNCDECL_SYS (srandom, void, (unsigned int seed));
+#  endif
+/* Need to cast, because on FreeBSD, the first parameter is
+                                       unsigned long seed.  */
+_GL_CXXALIAS_SYS_CAST (srandom, void, (unsigned int seed));
+# endif
+_GL_CXXALIASWARN (srandom);
+#elif defined GNULIB_POSIXCHECK
+# undef srandom
+# if HAVE_RAW_DECL_SRANDOM
+_GL_WARN_ON_USE (srandom, "srandom is unportable - "
+                 "use gnulib module random for portability");
+# endif
+#endif
+
+#if @GNULIB_RANDOM@
+# if @REPLACE_INITSTATE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef initstate
+#   define initstate rpl_initstate
+#  endif
+_GL_FUNCDECL_RPL (initstate, char *,
+                  (unsigned int seed, char *buf, size_t buf_size)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (initstate, char *,
+                  (unsigned int seed, char *buf, size_t buf_size));
+# else
+#  if !@HAVE_INITSTATE@ || !@HAVE_DECL_INITSTATE@
+_GL_FUNCDECL_SYS (initstate, char *,
+                  (unsigned int seed, char *buf, size_t buf_size)
+                  _GL_ARG_NONNULL ((2)));
+#  endif
+/* Need to cast, because on FreeBSD, the first parameter is
+                        unsigned long seed.  */
+_GL_CXXALIAS_SYS_CAST (initstate, char *,
+                       (unsigned int seed, char *buf, size_t buf_size));
+# endif
+_GL_CXXALIASWARN (initstate);
+#elif defined GNULIB_POSIXCHECK
+# undef initstate
+# if HAVE_RAW_DECL_INITSTATE
+_GL_WARN_ON_USE (initstate, "initstate is unportable - "
+                 "use gnulib module random for portability");
+# endif
+#endif
+
+#if @GNULIB_RANDOM@
+# if @REPLACE_SETSTATE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef setstate
+#   define setstate rpl_setstate
+#  endif
+_GL_FUNCDECL_RPL (setstate, char *, (char *arg_state) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (setstate, char *, (char *arg_state));
+# else
+#  if !@HAVE_SETSTATE@ || !@HAVE_DECL_SETSTATE@
+_GL_FUNCDECL_SYS (setstate, char *, (char *arg_state) _GL_ARG_NONNULL ((1)));
+#  endif
+/* Need to cast, because on Mac OS X 10.13, HP-UX, Solaris the first parameter
+   is                                     const char *arg_state.  */
+_GL_CXXALIAS_SYS_CAST (setstate, char *, (char *arg_state));
+# endif
+_GL_CXXALIASWARN (setstate);
+#elif defined GNULIB_POSIXCHECK
+# undef setstate
+# if HAVE_RAW_DECL_SETSTATE
+_GL_WARN_ON_USE (setstate, "setstate is unportable - "
+                 "use gnulib module random for portability");
+# endif
+#endif
+
+
+#if @GNULIB_RANDOM_R@
+# if @REPLACE_RANDOM_R@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef random_r
+#   define random_r rpl_random_r
+#  endif
+_GL_FUNCDECL_RPL (random_r, int, (struct random_data *buf, int32_t *result)
+                                 _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (random_r, int, (struct random_data *buf, int32_t *result));
+# else
+#  if !@HAVE_RANDOM_R@
+_GL_FUNCDECL_SYS (random_r, int, (struct random_data *buf, int32_t *result)
+                                 _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (random_r, int, (struct random_data *buf, int32_t *result));
+# endif
+_GL_CXXALIASWARN (random_r);
+#elif defined GNULIB_POSIXCHECK
+# undef random_r
+# if HAVE_RAW_DECL_RANDOM_R
+_GL_WARN_ON_USE (random_r, "random_r is unportable - "
+                 "use gnulib module random_r for portability");
+# endif
+#endif
+
+#if @GNULIB_RANDOM_R@
+# if @REPLACE_RANDOM_R@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef srandom_r
+#   define srandom_r rpl_srandom_r
+#  endif
+_GL_FUNCDECL_RPL (srandom_r, int,
+                  (unsigned int seed, struct random_data *rand_state)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (srandom_r, int,
+                  (unsigned int seed, struct random_data *rand_state));
+# else
+#  if !@HAVE_RANDOM_R@
+_GL_FUNCDECL_SYS (srandom_r, int,
+                  (unsigned int seed, struct random_data *rand_state)
+                  _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (srandom_r, int,
+                  (unsigned int seed, struct random_data *rand_state));
+# endif
+_GL_CXXALIASWARN (srandom_r);
+#elif defined GNULIB_POSIXCHECK
+# undef srandom_r
+# if HAVE_RAW_DECL_SRANDOM_R
+_GL_WARN_ON_USE (srandom_r, "srandom_r is unportable - "
+                 "use gnulib module random_r for portability");
+# endif
+#endif
+
+#if @GNULIB_RANDOM_R@
+# if @REPLACE_RANDOM_R@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef initstate_r
+#   define initstate_r rpl_initstate_r
+#  endif
+_GL_FUNCDECL_RPL (initstate_r, int,
+                  (unsigned int seed, char *buf, size_t buf_size,
+                   struct random_data *rand_state)
+                  _GL_ARG_NONNULL ((2, 4)));
+_GL_CXXALIAS_RPL (initstate_r, int,
+                  (unsigned int seed, char *buf, size_t buf_size,
+                   struct random_data *rand_state));
+# else
+#  if !@HAVE_RANDOM_R@
+_GL_FUNCDECL_SYS (initstate_r, int,
+                  (unsigned int seed, char *buf, size_t buf_size,
+                   struct random_data *rand_state)
+                  _GL_ARG_NONNULL ((2, 4)));
+#  endif
+/* Need to cast, because on Haiku, the third parameter is
+                                                     unsigned long buf_size.  */
+_GL_CXXALIAS_SYS_CAST (initstate_r, int,
+                       (unsigned int seed, char *buf, size_t buf_size,
+                        struct random_data *rand_state));
+# endif
+_GL_CXXALIASWARN (initstate_r);
+#elif defined GNULIB_POSIXCHECK
+# undef initstate_r
+# if HAVE_RAW_DECL_INITSTATE_R
+_GL_WARN_ON_USE (initstate_r, "initstate_r is unportable - "
+                 "use gnulib module random_r for portability");
+# endif
+#endif
+
+#if @GNULIB_RANDOM_R@
+# if @REPLACE_RANDOM_R@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef setstate_r
+#   define setstate_r rpl_setstate_r
+#  endif
+_GL_FUNCDECL_RPL (setstate_r, int,
+                  (char *arg_state, struct random_data *rand_state)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (setstate_r, int,
+                  (char *arg_state, struct random_data *rand_state));
+# else
+#  if !@HAVE_RANDOM_R@
+_GL_FUNCDECL_SYS (setstate_r, int,
+                  (char *arg_state, struct random_data *rand_state)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+/* Need to cast, because on Haiku, the first parameter is
+                        void *arg_state.  */
+_GL_CXXALIAS_SYS_CAST (setstate_r, int,
+                       (char *arg_state, struct random_data *rand_state));
+# endif
+_GL_CXXALIASWARN (setstate_r);
+#elif defined GNULIB_POSIXCHECK
+# undef setstate_r
+# if HAVE_RAW_DECL_SETSTATE_R
+_GL_WARN_ON_USE (setstate_r, "setstate_r is unportable - "
+                 "use gnulib module random_r for portability");
+# endif
+#endif
+
+
+#if @GNULIB_REALLOC_POSIX@
+# if @REPLACE_REALLOC@
+#  if !((defined __cplusplus && defined GNULIB_NAMESPACE) \
+        || _GL_USE_STDLIB_ALLOC)
+#   undef realloc
+#   define realloc rpl_realloc
+#  endif
+_GL_FUNCDECL_RPL (realloc, void *, (void *ptr, size_t size)
+                                   _GL_ATTRIBUTE_DEALLOC_FREE);
+_GL_CXXALIAS_RPL (realloc, void *, (void *ptr, size_t size));
+# else
+#  if __GNUC__ >= 11
+/* For -Wmismatched-dealloc: Associate realloc with free or rpl_free.  */
+_GL_FUNCDECL_SYS (realloc, void *, (void *ptr, size_t size)
+                                   _GL_ATTRIBUTE_DEALLOC_FREE);
+#  endif
+_GL_CXXALIAS_SYS (realloc, void *, (void *ptr, size_t size));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (realloc);
+# endif
+#else
+# if @GNULIB_FREE_POSIX@ && __GNUC__ >= 11 && !defined realloc
+/* For -Wmismatched-dealloc: Associate realloc with free or rpl_free.  */
+_GL_FUNCDECL_SYS (realloc, void *, (void *ptr, size_t size)
+                                   _GL_ATTRIBUTE_DEALLOC_FREE);
+# endif
+# if defined GNULIB_POSIXCHECK && !_GL_USE_STDLIB_ALLOC
+#  undef realloc
+/* Assume realloc is always declared.  */
+_GL_WARN_ON_USE (realloc, "realloc is not POSIX compliant everywhere - "
+                 "use gnulib module realloc-posix for portability");
+# endif
+#endif
+
+
+#if @GNULIB_REALLOCARRAY@
+# if @REPLACE_REALLOCARRAY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef reallocarray
+#   define reallocarray rpl_reallocarray
+#  endif
+_GL_FUNCDECL_RPL (reallocarray, void *,
+                  (void *ptr, size_t nmemb, size_t size));
+_GL_CXXALIAS_RPL (reallocarray, void *,
+                  (void *ptr, size_t nmemb, size_t size));
+# else
+#  if ! @HAVE_REALLOCARRAY@
+_GL_FUNCDECL_SYS (reallocarray, void *,
+                  (void *ptr, size_t nmemb, size_t size));
+#  endif
+_GL_CXXALIAS_SYS (reallocarray, void *,
+                  (void *ptr, size_t nmemb, size_t size));
+# endif
+_GL_CXXALIASWARN (reallocarray);
+#elif defined GNULIB_POSIXCHECK
+# undef reallocarray
+# if HAVE_RAW_DECL_REALLOCARRAY
+_GL_WARN_ON_USE (reallocarray, "reallocarray is not portable - "
+                 "use gnulib module reallocarray for portability");
+# endif
+#endif
+
+#if @GNULIB_REALPATH@
+# if @REPLACE_REALPATH@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define realpath rpl_realpath
+#  endif
+_GL_FUNCDECL_RPL (realpath, char *,
+                  (const char *restrict name, char *restrict resolved)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (realpath, char *,
+                  (const char *restrict name, char *restrict resolved));
+# else
+#  if !@HAVE_REALPATH@
+_GL_FUNCDECL_SYS (realpath, char *,
+                  (const char *restrict name, char *restrict resolved)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (realpath, char *,
+                  (const char *restrict name, char *restrict resolved));
+# endif
+_GL_CXXALIASWARN (realpath);
+#elif defined GNULIB_POSIXCHECK
+# undef realpath
+# if HAVE_RAW_DECL_REALPATH
+_GL_WARN_ON_USE (realpath, "realpath is unportable - use gnulib module "
+                 "canonicalize or canonicalize-lgpl for portability");
+# endif
+#endif
+
+#if @GNULIB_RPMATCH@
+/* Test a user response to a question.
+   Return 1 if it is affirmative, 0 if it is negative, or -1 if not clear.  */
+# if !@HAVE_RPMATCH@
+_GL_FUNCDECL_SYS (rpmatch, int, (const char *response) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (rpmatch, int, (const char *response));
+_GL_CXXALIASWARN (rpmatch);
+#elif defined GNULIB_POSIXCHECK
+# undef rpmatch
+# if HAVE_RAW_DECL_RPMATCH
+_GL_WARN_ON_USE (rpmatch, "rpmatch is unportable - "
+                 "use gnulib module rpmatch for portability");
+# endif
+#endif
+
+#if @GNULIB_SECURE_GETENV@
+/* Look up NAME in the environment, returning 0 in insecure situations.  */
+# if !@HAVE_SECURE_GETENV@
+_GL_FUNCDECL_SYS (secure_getenv, char *,
+                  (char const *name) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (secure_getenv, char *, (char const *name));
+_GL_CXXALIASWARN (secure_getenv);
+#elif defined GNULIB_POSIXCHECK
+# undef secure_getenv
+# if HAVE_RAW_DECL_SECURE_GETENV
+_GL_WARN_ON_USE (secure_getenv, "secure_getenv is unportable - "
+                 "use gnulib module secure_getenv for portability");
+# endif
+#endif
+
+#if @GNULIB_SETENV@
+/* Set NAME to VALUE in the environment.
+   If REPLACE is nonzero, overwrite an existing value.  */
+# if @REPLACE_SETENV@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef setenv
+#   define setenv rpl_setenv
+#  endif
+_GL_FUNCDECL_RPL (setenv, int,
+                  (const char *name, const char *value, int replace)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (setenv, int,
+                  (const char *name, const char *value, int replace));
+# else
+#  if !@HAVE_DECL_SETENV@
+_GL_FUNCDECL_SYS (setenv, int,
+                  (const char *name, const char *value, int replace)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (setenv, int,
+                  (const char *name, const char *value, int replace));
+# endif
+# if !(@REPLACE_SETENV@ && !@HAVE_DECL_SETENV@)
+_GL_CXXALIASWARN (setenv);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef setenv
+# if HAVE_RAW_DECL_SETENV
+_GL_WARN_ON_USE (setenv, "setenv is unportable - "
+                 "use gnulib module setenv for portability");
+# endif
+#endif
+
+#if @GNULIB_STRTOD@
+ /* Parse a double from STRING, updating ENDP if appropriate.  */
+# if @REPLACE_STRTOD@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define strtod rpl_strtod
+#  endif
+#  define GNULIB_defined_strtod_function 1
+_GL_FUNCDECL_RPL (strtod, double,
+                  (const char *restrict str, char **restrict endp)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (strtod, double,
+                  (const char *restrict str, char **restrict endp));
+# else
+#  if !@HAVE_STRTOD@
+_GL_FUNCDECL_SYS (strtod, double,
+                  (const char *restrict str, char **restrict endp)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (strtod, double,
+                  (const char *restrict str, char **restrict endp));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (strtod);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strtod
+# if HAVE_RAW_DECL_STRTOD
+_GL_WARN_ON_USE (strtod, "strtod is unportable - "
+                 "use gnulib module strtod for portability");
+# endif
+#endif
+
+#if @GNULIB_STRTOLD@
+ /* Parse a 'long double' from STRING, updating ENDP if appropriate.  */
+# if @REPLACE_STRTOLD@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define strtold rpl_strtold
+#  endif
+#  define GNULIB_defined_strtold_function 1
+_GL_FUNCDECL_RPL (strtold, long double,
+                  (const char *restrict str, char **restrict endp)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (strtold, long double,
+                  (const char *restrict str, char **restrict endp));
+# else
+#  if !@HAVE_STRTOLD@
+_GL_FUNCDECL_SYS (strtold, long double,
+                  (const char *restrict str, char **restrict endp)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (strtold, long double,
+                  (const char *restrict str, char **restrict endp));
+# endif
+_GL_CXXALIASWARN (strtold);
+#elif defined GNULIB_POSIXCHECK
+# undef strtold
+# if HAVE_RAW_DECL_STRTOLD
+_GL_WARN_ON_USE (strtold, "strtold is unportable - "
+                 "use gnulib module strtold for portability");
+# endif
+#endif
+
+#if @GNULIB_STRTOL@
+/* Parse a signed integer whose textual representation starts at STRING.
+   The integer is expected to be in base BASE (2 <= BASE <= 36); if BASE == 0,
+   it may be decimal or octal (with prefix "0") or hexadecimal (with prefix
+   "0x").
+   If ENDPTR is not NULL, the address of the first byte after the integer is
+   stored in *ENDPTR.
+   Upon overflow, the return value is LONG_MAX or LONG_MIN, and errno is set
+   to ERANGE.  */
+# if @REPLACE_STRTOL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define strtol rpl_strtol
+#  endif
+#  define GNULIB_defined_strtol_function 1
+_GL_FUNCDECL_RPL (strtol, long,
+                  (const char *restrict string, char **restrict endptr,
+                   int base)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (strtol, long,
+                  (const char *restrict string, char **restrict endptr,
+                   int base));
+# else
+#  if !@HAVE_STRTOL@
+_GL_FUNCDECL_SYS (strtol, long,
+                  (const char *restrict string, char **restrict endptr,
+                   int base)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (strtol, long,
+                  (const char *restrict string, char **restrict endptr,
+                   int base));
+# endif
+_GL_CXXALIASWARN (strtol);
+#elif defined GNULIB_POSIXCHECK
+# undef strtol
+# if HAVE_RAW_DECL_STRTOL
+_GL_WARN_ON_USE (strtol, "strtol is unportable - "
+                 "use gnulib module strtol for portability");
+# endif
+#endif
+
+#if @GNULIB_STRTOLL@
+/* Parse a signed integer whose textual representation starts at STRING.
+   The integer is expected to be in base BASE (2 <= BASE <= 36); if BASE == 0,
+   it may be decimal or octal (with prefix "0") or hexadecimal (with prefix
+   "0x").
+   If ENDPTR is not NULL, the address of the first byte after the integer is
+   stored in *ENDPTR.
+   Upon overflow, the return value is LLONG_MAX or LLONG_MIN, and errno is set
+   to ERANGE.  */
+# if @REPLACE_STRTOLL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define strtoll rpl_strtoll
+#  endif
+#  define GNULIB_defined_strtoll_function 1
+_GL_FUNCDECL_RPL (strtoll, long long,
+                  (const char *restrict string, char **restrict endptr,
+                   int base)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (strtoll, long long,
+                  (const char *restrict string, char **restrict endptr,
+                   int base));
+# else
+#  if !@HAVE_STRTOLL@
+_GL_FUNCDECL_SYS (strtoll, long long,
+                  (const char *restrict string, char **restrict endptr,
+                   int base)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (strtoll, long long,
+                  (const char *restrict string, char **restrict endptr,
+                   int base));
+# endif
+_GL_CXXALIASWARN (strtoll);
+#elif defined GNULIB_POSIXCHECK
+# undef strtoll
+# if HAVE_RAW_DECL_STRTOLL
+_GL_WARN_ON_USE (strtoll, "strtoll is unportable - "
+                 "use gnulib module strtoll for portability");
+# endif
+#endif
+
+#if @GNULIB_STRTOUL@
+/* Parse an unsigned integer whose textual representation starts at STRING.
+   The integer is expected to be in base BASE (2 <= BASE <= 36); if BASE == 0,
+   it may be decimal or octal (with prefix "0") or hexadecimal (with prefix
+   "0x").
+   If ENDPTR is not NULL, the address of the first byte after the integer is
+   stored in *ENDPTR.
+   Upon overflow, the return value is ULONG_MAX, and errno is set to ERANGE.  */
+# if @REPLACE_STRTOUL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define strtoul rpl_strtoul
+#  endif
+#  define GNULIB_defined_strtoul_function 1
+_GL_FUNCDECL_RPL (strtoul, unsigned long,
+                  (const char *restrict string, char **restrict endptr,
+                   int base)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (strtoul, unsigned long,
+                  (const char *restrict string, char **restrict endptr,
+                   int base));
+# else
+#  if !@HAVE_STRTOUL@
+_GL_FUNCDECL_SYS (strtoul, unsigned long,
+                  (const char *restrict string, char **restrict endptr,
+                   int base)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (strtoul, unsigned long,
+                  (const char *restrict string, char **restrict endptr,
+                   int base));
+# endif
+_GL_CXXALIASWARN (strtoul);
+#elif defined GNULIB_POSIXCHECK
+# undef strtoul
+# if HAVE_RAW_DECL_STRTOUL
+_GL_WARN_ON_USE (strtoul, "strtoul is unportable - "
+                 "use gnulib module strtoul for portability");
+# endif
+#endif
+
+#if @GNULIB_STRTOULL@
+/* Parse an unsigned integer whose textual representation starts at STRING.
+   The integer is expected to be in base BASE (2 <= BASE <= 36); if BASE == 0,
+   it may be decimal or octal (with prefix "0") or hexadecimal (with prefix
+   "0x").
+   If ENDPTR is not NULL, the address of the first byte after the integer is
+   stored in *ENDPTR.
+   Upon overflow, the return value is ULLONG_MAX, and errno is set to
+   ERANGE.  */
+# if @REPLACE_STRTOULL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define strtoull rpl_strtoull
+#  endif
+#  define GNULIB_defined_strtoull_function 1
+_GL_FUNCDECL_RPL (strtoull, unsigned long long,
+                  (const char *restrict string, char **restrict endptr,
+                   int base)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (strtoull, unsigned long long,
+                  (const char *restrict string, char **restrict endptr,
+                   int base));
+# else
+#  if !@HAVE_STRTOULL@
+_GL_FUNCDECL_SYS (strtoull, unsigned long long,
+                  (const char *restrict string, char **restrict endptr,
+                   int base)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (strtoull, unsigned long long,
+                  (const char *restrict string, char **restrict endptr,
+                   int base));
+# endif
+_GL_CXXALIASWARN (strtoull);
+#elif defined GNULIB_POSIXCHECK
+# undef strtoull
+# if HAVE_RAW_DECL_STRTOULL
+_GL_WARN_ON_USE (strtoull, "strtoull is unportable - "
+                 "use gnulib module strtoull for portability");
+# endif
+#endif
+
+#if @GNULIB_UNLOCKPT@
+/* Unlock the slave side of the pseudo-terminal whose master side is specified
+   by FD, so that it can be opened.  */
+# if !@HAVE_UNLOCKPT@
+_GL_FUNCDECL_SYS (unlockpt, int, (int fd));
+# endif
+_GL_CXXALIAS_SYS (unlockpt, int, (int fd));
+_GL_CXXALIASWARN (unlockpt);
+#elif defined GNULIB_POSIXCHECK
+# undef unlockpt
+# if HAVE_RAW_DECL_UNLOCKPT
+_GL_WARN_ON_USE (unlockpt, "unlockpt is not portable - "
+                 "use gnulib module unlockpt for portability");
+# endif
+#endif
+
+#if @GNULIB_UNSETENV@
+/* Remove the variable NAME from the environment.  */
+# if @REPLACE_UNSETENV@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef unsetenv
+#   define unsetenv rpl_unsetenv
+#  endif
+_GL_FUNCDECL_RPL (unsetenv, int, (const char *name) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (unsetenv, int, (const char *name));
+# else
+#  if !@HAVE_DECL_UNSETENV@
+_GL_FUNCDECL_SYS (unsetenv, int, (const char *name) _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (unsetenv, int, (const char *name));
+# endif
+# if !(@REPLACE_UNSETENV@ && !@HAVE_DECL_UNSETENV@)
+_GL_CXXALIASWARN (unsetenv);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef unsetenv
+# if HAVE_RAW_DECL_UNSETENV
+_GL_WARN_ON_USE (unsetenv, "unsetenv is unportable - "
+                 "use gnulib module unsetenv for portability");
+# endif
+#endif
+
+/* Convert a wide character to a multibyte character.  */
+#if @GNULIB_WCTOMB@
+# if @REPLACE_WCTOMB@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef wctomb
+#   define wctomb rpl_wctomb
+#  endif
+_GL_FUNCDECL_RPL (wctomb, int, (char *s, wchar_t wc));
+_GL_CXXALIAS_RPL (wctomb, int, (char *s, wchar_t wc));
+# else
+_GL_CXXALIAS_SYS (wctomb, int, (char *s, wchar_t wc));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wctomb);
+# endif
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_STDLIB_H */
+#endif /* _@GUARD_PREFIX@_STDLIB_H */
+#endif
diff --git a/src/grep/lib/stpcpy.c b/src/grep/lib/stpcpy.c
new file mode 100644
index 0000000..c312fe4
--- /dev/null
+++ b/src/grep/lib/stpcpy.c
@@ -0,0 +1,49 @@
+/* stpcpy.c -- copy a string and return pointer to end of new string
+   Copyright (C) 1992, 1995, 1997-1998, 2006, 2009-2021 Free Software
+   Foundation, Inc.
+
+   NOTE: The canonical source of this file is maintained with the GNU C Library.
+   Bugs can be reported to bug-glibc@prep.ai.mit.edu.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#undef __stpcpy
+#ifdef _LIBC
+# undef stpcpy
+#endif
+
+#ifndef weak_alias
+# define __stpcpy stpcpy
+#endif
+
+/* Copy SRC to DEST, returning the address of the terminating '\0' in DEST.  */
+char *
+__stpcpy (char *dest, const char *src)
+{
+  register char *d = dest;
+  register const char *s = src;
+
+  do
+    *d++ = *s;
+  while (*s++ != '\0');
+
+  return d - 1;
+}
+#ifdef weak_alias
+weak_alias (__stpcpy, stpcpy)
+#endif
diff --git a/src/grep/lib/str-kmp.h b/src/grep/lib/str-kmp.h
new file mode 100644
index 0000000..22c5701
--- /dev/null
+++ b/src/grep/lib/str-kmp.h
@@ -0,0 +1,161 @@
+/* Substring search in a NUL terminated string of UNIT elements,
+   using the Knuth-Morris-Pratt algorithm.
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2005.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation; either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Before including this file, you need to define:
+     UNIT                    The element type of the needle and haystack.
+     CANON_ELEMENT(c)        A macro that canonicalizes an element right after
+                             it has been fetched from needle or haystack.
+                             The argument is of type UNIT; the result must be
+                             of type UNIT as well.  */
+
+/* Knuth-Morris-Pratt algorithm.
+   See https://en.wikipedia.org/wiki/Knuth-Morris-Pratt_algorithm
+   HAYSTACK is the NUL terminated string in which to search for.
+   NEEDLE is the string to search for in HAYSTACK, consisting of NEEDLE_LEN
+   units.
+   Return a boolean indicating success:
+   Return true and set *RESULTP if the search was completed.
+   Return false if it was aborted because not enough memory was available.  */
+static bool
+knuth_morris_pratt (const UNIT *haystack,
+                    const UNIT *needle, size_t needle_len,
+                    const UNIT **resultp)
+{
+  size_t m = needle_len;
+
+  /* Allocate the table.  */
+  size_t *table = (size_t *) nmalloca (m, sizeof (size_t));
+  if (table == NULL)
+    return false;
+  /* Fill the table.
+     For 0 < i < m:
+       0 < table[i] <= i is defined such that
+       forall 0 < x < table[i]: needle[x..i-1] != needle[0..i-1-x],
+       and table[i] is as large as possible with this property.
+     This implies:
+     1) For 0 < i < m:
+          If table[i] < i,
+          needle[table[i]..i-1] = needle[0..i-1-table[i]].
+     2) For 0 < i < m:
+          rhaystack[0..i-1] == needle[0..i-1]
+          and exists h, i <= h < m: rhaystack[h] != needle[h]
+          implies
+          forall 0 <= x < table[i]: rhaystack[x..x+m-1] != needle[0..m-1].
+     table[0] remains uninitialized.  */
+  {
+    size_t i, j;
+
+    /* i = 1: Nothing to verify for x = 0.  */
+    table[1] = 1;
+    j = 0;
+
+    for (i = 2; i < m; i++)
+      {
+        /* Here: j = i-1 - table[i-1].
+           The inequality needle[x..i-1] != needle[0..i-1-x] is known to hold
+           for x < table[i-1], by induction.
+           Furthermore, if j>0: needle[i-1-j..i-2] = needle[0..j-1].  */
+        UNIT b = CANON_ELEMENT (needle[i - 1]);
+
+        for (;;)
+          {
+            /* Invariants: The inequality needle[x..i-1] != needle[0..i-1-x]
+               is known to hold for x < i-1-j.
+               Furthermore, if j>0: needle[i-1-j..i-2] = needle[0..j-1].  */
+            if (b == CANON_ELEMENT (needle[j]))
+              {
+                /* Set table[i] := i-1-j.  */
+                table[i] = i - ++j;
+                break;
+              }
+            /* The inequality needle[x..i-1] != needle[0..i-1-x] also holds
+               for x = i-1-j, because
+                 needle[i-1] != needle[j] = needle[i-1-x].  */
+            if (j == 0)
+              {
+                /* The inequality holds for all possible x.  */
+                table[i] = i;
+                break;
+              }
+            /* The inequality needle[x..i-1] != needle[0..i-1-x] also holds
+               for i-1-j < x < i-1-j+table[j], because for these x:
+                 needle[x..i-2]
+                 = needle[x-(i-1-j)..j-1]
+                 != needle[0..j-1-(x-(i-1-j))]  (by definition of table[j])
+                    = needle[0..i-2-x],
+               hence needle[x..i-1] != needle[0..i-1-x].
+               Furthermore
+                 needle[i-1-j+table[j]..i-2]
+                 = needle[table[j]..j-1]
+                 = needle[0..j-1-table[j]]  (by definition of table[j]).  */
+            j = j - table[j];
+          }
+        /* Here: j = i - table[i].  */
+      }
+  }
+
+  /* Search, using the table to accelerate the processing.  */
+  {
+    size_t j;
+    const UNIT *rhaystack;
+    const UNIT *phaystack;
+
+    *resultp = NULL;
+    j = 0;
+    rhaystack = haystack;
+    phaystack = haystack;
+    /* Invariant: phaystack = rhaystack + j.  */
+    while (*phaystack != 0)
+      if (CANON_ELEMENT (needle[j]) == CANON_ELEMENT (*phaystack))
+        {
+          j++;
+          phaystack++;
+          if (j == m)
+            {
+              /* The entire needle has been found.  */
+              *resultp = rhaystack;
+              break;
+            }
+        }
+      else if (j > 0)
+        {
+          /* Found a match of needle[0..j-1], mismatch at needle[j].  */
+          rhaystack += table[j];
+          j -= table[j];
+        }
+      else
+        {
+          /* Found a mismatch at needle[0] already.  */
+          rhaystack++;
+          phaystack++;
+        }
+  }
+
+  freea (table);
+  return true;
+}
+
+#undef CANON_ELEMENT
diff --git a/src/grep/lib/str-two-way.h b/src/grep/lib/str-two-way.h
new file mode 100644
index 0000000..fc2db03
--- /dev/null
+++ b/src/grep/lib/str-two-way.h
@@ -0,0 +1,452 @@
+/* Byte-wise substring search, using the Two-Way algorithm.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Written by Eric Blake <ebb9@byu.net>, 2008.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Before including this file, you need to include <config.h> and
+   <string.h>, and define:
+     RETURN_TYPE             A macro that expands to the return type.
+     AVAILABLE(h, h_l, j, n_l)
+                             A macro that returns nonzero if there are
+                             at least N_L bytes left starting at H[J].
+                             H is 'unsigned char *', H_L, J, and N_L
+                             are 'size_t'; H_L is an lvalue.  For
+                             NUL-terminated searches, H_L can be
+                             modified each iteration to avoid having
+                             to compute the end of H up front.
+
+  For case-insensitivity, you may optionally define:
+     CMP_FUNC(p1, p2, l)     A macro that returns 0 iff the first L
+                             characters of P1 and P2 are equal.
+     CANON_ELEMENT(c)        A macro that canonicalizes an element right after
+                             it has been fetched from one of the two strings.
+                             The argument is an 'unsigned char'; the result
+                             must be an 'unsigned char' as well.
+
+  This file undefines the macros documented above, and defines
+  LONG_NEEDLE_THRESHOLD.
+*/
+
+#include <limits.h>
+#include <stdint.h>
+
+/* We use the Two-Way string matching algorithm (also known as
+   Chrochemore-Perrin), which guarantees linear complexity with
+   constant space.  Additionally, for long needles, we also use a bad
+   character shift table similar to the Boyer-Moore algorithm to
+   achieve improved (potentially sub-linear) performance.
+
+   See https://www-igm.univ-mlv.fr/~lecroq/string/node26.html#SECTION00260,
+   https://en.wikipedia.org/wiki/Boyer-Moore_string_search_algorithm,
+   https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.34.6641&rep=rep1&type=pdf
+*/
+
+/* Point at which computing a bad-byte shift table is likely to be
+   worthwhile.  Small needles should not compute a table, since it
+   adds (1 << CHAR_BIT) + NEEDLE_LEN computations of preparation for a
+   speedup no greater than a factor of NEEDLE_LEN.  The larger the
+   needle, the better the potential performance gain.  On the other
+   hand, on non-POSIX systems with CHAR_BIT larger than eight, the
+   memory required for the table is prohibitive.  */
+#if CHAR_BIT < 10
+# define LONG_NEEDLE_THRESHOLD 32U
+#else
+# define LONG_NEEDLE_THRESHOLD SIZE_MAX
+#endif
+
+#ifndef MAX
+# define MAX(a, b) ((a < b) ? (b) : (a))
+#endif
+
+#ifndef CANON_ELEMENT
+# define CANON_ELEMENT(c) c
+#endif
+#ifndef CMP_FUNC
+# define CMP_FUNC memcmp
+#endif
+
+/* Perform a critical factorization of NEEDLE, of length NEEDLE_LEN.
+   Return the index of the first byte in the right half, and set
+   *PERIOD to the global period of the right half.
+
+   The global period of a string is the smallest index (possibly its
+   length) at which all remaining bytes in the string are repetitions
+   of the prefix (the last repetition may be a subset of the prefix).
+
+   When NEEDLE is factored into two halves, a local period is the
+   length of the smallest word that shares a suffix with the left half
+   and shares a prefix with the right half.  All factorizations of a
+   non-empty NEEDLE have a local period of at least 1 and no greater
+   than NEEDLE_LEN.
+
+   A critical factorization has the property that the local period
+   equals the global period.  All strings have at least one critical
+   factorization with the left half smaller than the global period.
+   And while some strings have more than one critical factorization,
+   it is provable that with an ordered alphabet, at least one of the
+   critical factorizations corresponds to a maximal suffix.
+
+   Given an ordered alphabet, a critical factorization can be computed
+   in linear time, with 2 * NEEDLE_LEN comparisons, by computing the
+   shorter of two ordered maximal suffixes.  The ordered maximal
+   suffixes are determined by lexicographic comparison while tracking
+   periodicity.  */
+static size_t
+critical_factorization (const unsigned char *needle, size_t needle_len,
+                        size_t *period)
+{
+  /* Index of last byte of left half, or SIZE_MAX.  */
+  size_t max_suffix, max_suffix_rev;
+  size_t j; /* Index into NEEDLE for current candidate suffix.  */
+  size_t k; /* Offset into current period.  */
+  size_t p; /* Intermediate period.  */
+  unsigned char a, b; /* Current comparison bytes.  */
+
+  /* Special case NEEDLE_LEN of 1 or 2 (all callers already filtered
+     out 0-length needles.  */
+  if (needle_len < 3)
+    {
+      *period = 1;
+      return needle_len - 1;
+    }
+
+  /* Invariants:
+     0 <= j < NEEDLE_LEN - 1
+     -1 <= max_suffix{,_rev} < j (treating SIZE_MAX as if it were signed)
+     min(max_suffix, max_suffix_rev) < global period of NEEDLE
+     1 <= p <= global period of NEEDLE
+     p == global period of the substring NEEDLE[max_suffix{,_rev}+1...j]
+     1 <= k <= p
+  */
+
+  /* Perform lexicographic search.  */
+  max_suffix = SIZE_MAX;
+  j = 0;
+  k = p = 1;
+  while (j + k < needle_len)
+    {
+      a = CANON_ELEMENT (needle[j + k]);
+      b = CANON_ELEMENT (needle[max_suffix + k]);
+      if (a < b)
+        {
+          /* Suffix is smaller, period is entire prefix so far.  */
+          j += k;
+          k = 1;
+          p = j - max_suffix;
+        }
+      else if (a == b)
+        {
+          /* Advance through repetition of the current period.  */
+          if (k != p)
+            ++k;
+          else
+            {
+              j += p;
+              k = 1;
+            }
+        }
+      else /* b < a */
+        {
+          /* Suffix is larger, start over from current location.  */
+          max_suffix = j++;
+          k = p = 1;
+        }
+    }
+  *period = p;
+
+  /* Perform reverse lexicographic search.  */
+  max_suffix_rev = SIZE_MAX;
+  j = 0;
+  k = p = 1;
+  while (j + k < needle_len)
+    {
+      a = CANON_ELEMENT (needle[j + k]);
+      b = CANON_ELEMENT (needle[max_suffix_rev + k]);
+      if (b < a)
+        {
+          /* Suffix is smaller, period is entire prefix so far.  */
+          j += k;
+          k = 1;
+          p = j - max_suffix_rev;
+        }
+      else if (a == b)
+        {
+          /* Advance through repetition of the current period.  */
+          if (k != p)
+            ++k;
+          else
+            {
+              j += p;
+              k = 1;
+            }
+        }
+      else /* a < b */
+        {
+          /* Suffix is larger, start over from current location.  */
+          max_suffix_rev = j++;
+          k = p = 1;
+        }
+    }
+
+  /* Choose the shorter suffix.  Return the index of the first byte of
+     the right half, rather than the last byte of the left half.
+
+     For some examples, 'banana' has two critical factorizations, both
+     exposed by the two lexicographic extreme suffixes of 'anana' and
+     'nana', where both suffixes have a period of 2.  On the other
+     hand, with 'aab' and 'bba', both strings have a single critical
+     factorization of the last byte, with the suffix having a period
+     of 1.  While the maximal lexicographic suffix of 'aab' is 'b',
+     the maximal lexicographic suffix of 'bba' is 'ba', which is not a
+     critical factorization.  Conversely, the maximal reverse
+     lexicographic suffix of 'a' works for 'bba', but not 'ab' for
+     'aab'.  The shorter suffix of the two will always be a critical
+     factorization.  */
+  if (max_suffix_rev + 1 < max_suffix + 1)
+    return max_suffix + 1;
+  *period = p;
+  return max_suffix_rev + 1;
+}
+
+/* Return the first location of non-empty NEEDLE within HAYSTACK, or
+   NULL.  HAYSTACK_LEN is the minimum known length of HAYSTACK.  This
+   method is optimized for NEEDLE_LEN < LONG_NEEDLE_THRESHOLD.
+   Performance is guaranteed to be linear, with an initialization cost
+   of 2 * NEEDLE_LEN comparisons.
+
+   If AVAILABLE does not modify HAYSTACK_LEN (as in memmem), then at
+   most 2 * HAYSTACK_LEN - NEEDLE_LEN comparisons occur in searching.
+   If AVAILABLE modifies HAYSTACK_LEN (as in strstr), then at most 3 *
+   HAYSTACK_LEN - NEEDLE_LEN comparisons occur in searching.  */
+static RETURN_TYPE
+two_way_short_needle (const unsigned char *haystack, size_t haystack_len,
+                      const unsigned char *needle, size_t needle_len)
+{
+  size_t i; /* Index into current byte of NEEDLE.  */
+  size_t j; /* Index into current window of HAYSTACK.  */
+  size_t period; /* The period of the right half of needle.  */
+  size_t suffix; /* The index of the right half of needle.  */
+
+  /* Factor the needle into two halves, such that the left half is
+     smaller than the global period, and the right half is
+     periodic (with a period as large as NEEDLE_LEN - suffix).  */
+  suffix = critical_factorization (needle, needle_len, &period);
+
+  /* Perform the search.  Each iteration compares the right half
+     first.  */
+  if (CMP_FUNC (needle, needle + period, suffix) == 0)
+    {
+      /* Entire needle is periodic; a mismatch in the left half can
+         only advance by the period, so use memory to avoid rescanning
+         known occurrences of the period in the right half.  */
+      size_t memory = 0;
+      j = 0;
+      while (AVAILABLE (haystack, haystack_len, j, needle_len))
+        {
+          /* Scan for matches in right half.  */
+          i = MAX (suffix, memory);
+          while (i < needle_len && (CANON_ELEMENT (needle[i])
+                                    == CANON_ELEMENT (haystack[i + j])))
+            ++i;
+          if (needle_len <= i)
+            {
+              /* Scan for matches in left half.  */
+              i = suffix - 1;
+              while (memory < i + 1 && (CANON_ELEMENT (needle[i])
+                                        == CANON_ELEMENT (haystack[i + j])))
+                --i;
+              if (i + 1 < memory + 1)
+                return (RETURN_TYPE) (haystack + j);
+              /* No match, so remember how many repetitions of period
+                 on the right half were scanned.  */
+              j += period;
+              memory = needle_len - period;
+            }
+          else
+            {
+              j += i - suffix + 1;
+              memory = 0;
+            }
+        }
+    }
+  else
+    {
+      /* The two halves of needle are distinct; no extra memory is
+         required, and any mismatch results in a maximal shift.  */
+      period = MAX (suffix, needle_len - suffix) + 1;
+      j = 0;
+      while (AVAILABLE (haystack, haystack_len, j, needle_len))
+        {
+          /* Scan for matches in right half.  */
+          i = suffix;
+          while (i < needle_len && (CANON_ELEMENT (needle[i])
+                                    == CANON_ELEMENT (haystack[i + j])))
+            ++i;
+          if (needle_len <= i)
+            {
+              /* Scan for matches in left half.  */
+              i = suffix - 1;
+              while (i != SIZE_MAX && (CANON_ELEMENT (needle[i])
+                                       == CANON_ELEMENT (haystack[i + j])))
+                --i;
+              if (i == SIZE_MAX)
+                return (RETURN_TYPE) (haystack + j);
+              j += period;
+            }
+          else
+            j += i - suffix + 1;
+        }
+    }
+  return NULL;
+}
+
+/* Return the first location of non-empty NEEDLE within HAYSTACK, or
+   NULL.  HAYSTACK_LEN is the minimum known length of HAYSTACK.  This
+   method is optimized for LONG_NEEDLE_THRESHOLD <= NEEDLE_LEN.
+   Performance is guaranteed to be linear, with an initialization cost
+   of 3 * NEEDLE_LEN + (1 << CHAR_BIT) operations.
+
+   If AVAILABLE does not modify HAYSTACK_LEN (as in memmem), then at
+   most 2 * HAYSTACK_LEN - NEEDLE_LEN comparisons occur in searching,
+   and sublinear performance O(HAYSTACK_LEN / NEEDLE_LEN) is possible.
+   If AVAILABLE modifies HAYSTACK_LEN (as in strstr), then at most 3 *
+   HAYSTACK_LEN - NEEDLE_LEN comparisons occur in searching, and
+   sublinear performance is not possible.  */
+static RETURN_TYPE
+two_way_long_needle (const unsigned char *haystack, size_t haystack_len,
+                     const unsigned char *needle, size_t needle_len)
+{
+  size_t i; /* Index into current byte of NEEDLE.  */
+  size_t j; /* Index into current window of HAYSTACK.  */
+  size_t period; /* The period of the right half of needle.  */
+  size_t suffix; /* The index of the right half of needle.  */
+  size_t shift_table[1U << CHAR_BIT]; /* See below.  */
+
+  /* Factor the needle into two halves, such that the left half is
+     smaller than the global period, and the right half is
+     periodic (with a period as large as NEEDLE_LEN - suffix).  */
+  suffix = critical_factorization (needle, needle_len, &period);
+
+  /* Populate shift_table.  For each possible byte value c,
+     shift_table[c] is the distance from the last occurrence of c to
+     the end of NEEDLE, or NEEDLE_LEN if c is absent from the NEEDLE.
+     shift_table[NEEDLE[NEEDLE_LEN - 1]] contains the only 0.  */
+  for (i = 0; i < 1U << CHAR_BIT; i++)
+    shift_table[i] = needle_len;
+  for (i = 0; i < needle_len; i++)
+    shift_table[CANON_ELEMENT (needle[i])] = needle_len - i - 1;
+
+  /* Perform the search.  Each iteration compares the right half
+     first.  */
+  if (CMP_FUNC (needle, needle + period, suffix) == 0)
+    {
+      /* Entire needle is periodic; a mismatch in the left half can
+         only advance by the period, so use memory to avoid rescanning
+         known occurrences of the period in the right half.  */
+      size_t memory = 0;
+      size_t shift;
+      j = 0;
+      while (AVAILABLE (haystack, haystack_len, j, needle_len))
+        {
+          /* Check the last byte first; if it does not match, then
+             shift to the next possible match location.  */
+          shift = shift_table[CANON_ELEMENT (haystack[j + needle_len - 1])];
+          if (0 < shift)
+            {
+              if (memory && shift < period)
+                {
+                  /* Since needle is periodic, but the last period has
+                     a byte out of place, there can be no match until
+                     after the mismatch.  */
+                  shift = needle_len - period;
+                }
+              memory = 0;
+              j += shift;
+              continue;
+            }
+          /* Scan for matches in right half.  The last byte has
+             already been matched, by virtue of the shift table.  */
+          i = MAX (suffix, memory);
+          while (i < needle_len - 1 && (CANON_ELEMENT (needle[i])
+                                        == CANON_ELEMENT (haystack[i + j])))
+            ++i;
+          if (needle_len - 1 <= i)
+            {
+              /* Scan for matches in left half.  */
+              i = suffix - 1;
+              while (memory < i + 1 && (CANON_ELEMENT (needle[i])
+                                        == CANON_ELEMENT (haystack[i + j])))
+                --i;
+              if (i + 1 < memory + 1)
+                return (RETURN_TYPE) (haystack + j);
+              /* No match, so remember how many repetitions of period
+                 on the right half were scanned.  */
+              j += period;
+              memory = needle_len - period;
+            }
+          else
+            {
+              j += i - suffix + 1;
+              memory = 0;
+            }
+        }
+    }
+  else
+    {
+      /* The two halves of needle are distinct; no extra memory is
+         required, and any mismatch results in a maximal shift.  */
+      size_t shift;
+      period = MAX (suffix, needle_len - suffix) + 1;
+      j = 0;
+      while (AVAILABLE (haystack, haystack_len, j, needle_len))
+        {
+          /* Check the last byte first; if it does not match, then
+             shift to the next possible match location.  */
+          shift = shift_table[CANON_ELEMENT (haystack[j + needle_len - 1])];
+          if (0 < shift)
+            {
+              j += shift;
+              continue;
+            }
+          /* Scan for matches in right half.  The last byte has
+             already been matched, by virtue of the shift table.  */
+          i = suffix;
+          while (i < needle_len - 1 && (CANON_ELEMENT (needle[i])
+                                        == CANON_ELEMENT (haystack[i + j])))
+            ++i;
+          if (needle_len - 1 <= i)
+            {
+              /* Scan for matches in left half.  */
+              i = suffix - 1;
+              while (i != SIZE_MAX && (CANON_ELEMENT (needle[i])
+                                       == CANON_ELEMENT (haystack[i + j])))
+                --i;
+              if (i == SIZE_MAX)
+                return (RETURN_TYPE) (haystack + j);
+              j += period;
+            }
+          else
+            j += i - suffix + 1;
+        }
+    }
+  return NULL;
+}
+
+#undef AVAILABLE
+#undef CANON_ELEMENT
+#undef CMP_FUNC
+#undef MAX
+#undef RETURN_TYPE
diff --git a/src/grep/lib/strdup.c b/src/grep/lib/strdup.c
new file mode 100644
index 0000000..e5d4d75
--- /dev/null
+++ b/src/grep/lib/strdup.c
@@ -0,0 +1,54 @@
+/* Copyright (C) 1991, 1996-1998, 2002-2004, 2006-2007, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _LIBC
+# include <config.h>
+#endif
+
+/* Get specification.  */
+#include <string.h>
+
+#include <stdlib.h>
+
+#undef __strdup
+#ifdef _LIBC
+# undef strdup
+#endif
+
+#ifndef weak_alias
+# define __strdup strdup
+#endif
+
+/* Duplicate S, returning an identical malloc'd string.  */
+char *
+__strdup (const char *s)
+{
+  size_t len = strlen (s) + 1;
+  void *new = malloc (len);
+
+  if (new == NULL)
+    return NULL;
+
+  return (char *) memcpy (new, s, len);
+}
+#ifdef libc_hidden_def
+libc_hidden_def (__strdup)
+#endif
+#ifdef weak_alias
+weak_alias (__strdup, strdup)
+#endif
diff --git a/src/grep/lib/streq.h b/src/grep/lib/streq.h
new file mode 100644
index 0000000..adabd15
--- /dev/null
+++ b/src/grep/lib/streq.h
@@ -0,0 +1,176 @@
+/* Optimized string comparison.
+   Copyright (C) 2001-2002, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>.  */
+
+#ifndef _GL_STREQ_H
+#define _GL_STREQ_H
+
+#include <string.h>
+
+/* STREQ_OPT allows to optimize string comparison with a small literal string.
+     STREQ_OPT (s, "EUC-KR", 'E', 'U', 'C', '-', 'K', 'R', 0, 0, 0)
+   is semantically equivalent to
+     strcmp (s, "EUC-KR") == 0
+   just faster.  */
+
+/* Help GCC to generate good code for string comparisons with
+   immediate strings. */
+#if (defined __GNUC__ || defined __clang__) && defined __OPTIMIZE__
+
+static inline int
+streq9 (const char *s1, const char *s2)
+{
+  return strcmp (s1 + 9, s2 + 9) == 0;
+}
+
+static inline int
+streq8 (const char *s1, const char *s2, char s28)
+{
+  if (s1[8] == s28)
+    {
+      if (s28 == 0)
+        return 1;
+      else
+        return streq9 (s1, s2);
+    }
+  else
+    return 0;
+}
+
+static inline int
+streq7 (const char *s1, const char *s2, char s27, char s28)
+{
+  if (s1[7] == s27)
+    {
+      if (s27 == 0)
+        return 1;
+      else
+        return streq8 (s1, s2, s28);
+    }
+  else
+    return 0;
+}
+
+static inline int
+streq6 (const char *s1, const char *s2, char s26, char s27, char s28)
+{
+  if (s1[6] == s26)
+    {
+      if (s26 == 0)
+        return 1;
+      else
+        return streq7 (s1, s2, s27, s28);
+    }
+  else
+    return 0;
+}
+
+static inline int
+streq5 (const char *s1, const char *s2, char s25, char s26, char s27, char s28)
+{
+  if (s1[5] == s25)
+    {
+      if (s25 == 0)
+        return 1;
+      else
+        return streq6 (s1, s2, s26, s27, s28);
+    }
+  else
+    return 0;
+}
+
+static inline int
+streq4 (const char *s1, const char *s2, char s24, char s25, char s26, char s27, char s28)
+{
+  if (s1[4] == s24)
+    {
+      if (s24 == 0)
+        return 1;
+      else
+        return streq5 (s1, s2, s25, s26, s27, s28);
+    }
+  else
+    return 0;
+}
+
+static inline int
+streq3 (const char *s1, const char *s2, char s23, char s24, char s25, char s26, char s27, char s28)
+{
+  if (s1[3] == s23)
+    {
+      if (s23 == 0)
+        return 1;
+      else
+        return streq4 (s1, s2, s24, s25, s26, s27, s28);
+    }
+  else
+    return 0;
+}
+
+static inline int
+streq2 (const char *s1, const char *s2, char s22, char s23, char s24, char s25, char s26, char s27, char s28)
+{
+  if (s1[2] == s22)
+    {
+      if (s22 == 0)
+        return 1;
+      else
+        return streq3 (s1, s2, s23, s24, s25, s26, s27, s28);
+    }
+  else
+    return 0;
+}
+
+static inline int
+streq1 (const char *s1, const char *s2, char s21, char s22, char s23, char s24, char s25, char s26, char s27, char s28)
+{
+  if (s1[1] == s21)
+    {
+      if (s21 == 0)
+        return 1;
+      else
+        return streq2 (s1, s2, s22, s23, s24, s25, s26, s27, s28);
+    }
+  else
+    return 0;
+}
+
+static inline int
+streq0 (const char *s1, const char *s2, char s20, char s21, char s22, char s23, char s24, char s25, char s26, char s27, char s28)
+{
+  if (s1[0] == s20)
+    {
+      if (s20 == 0)
+        return 1;
+      else
+        return streq1 (s1, s2, s21, s22, s23, s24, s25, s26, s27, s28);
+    }
+  else
+    return 0;
+}
+
+#define STREQ_OPT(s1,s2,s20,s21,s22,s23,s24,s25,s26,s27,s28) \
+  streq0 (s1, s2, s20, s21, s22, s23, s24, s25, s26, s27, s28)
+
+#else
+
+#define STREQ_OPT(s1,s2,s20,s21,s22,s23,s24,s25,s26,s27,s28) \
+  (strcmp (s1, s2) == 0)
+
+#endif
+
+#endif /* _GL_STREQ_H */
diff --git a/src/grep/lib/strerror-override.c b/src/grep/lib/strerror-override.c
new file mode 100644
index 0000000..e76d55d
--- /dev/null
+++ b/src/grep/lib/strerror-override.c
@@ -0,0 +1,306 @@
+/* strerror-override.c --- POSIX compatible system error routine
+
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2010.  */
+
+#include <config.h>
+
+#include "strerror-override.h"
+
+#include <errno.h>
+
+#if GNULIB_defined_EWINSOCK /* native Windows platforms */
+# if HAVE_WINSOCK2_H
+#  include <winsock2.h>
+# endif
+#endif
+
+#if !GNULIB_defined_strerror_override_macro
+
+/* If ERRNUM maps to an errno value defined by gnulib, return a string
+   describing the error.  Otherwise return NULL.  */
+const char *
+strerror_override (int errnum)
+{
+  /* These error messages are taken from glibc/sysdeps/gnu/errlist.c.  */
+  switch (errnum)
+    {
+# if REPLACE_STRERROR_0
+    case 0:
+      return "Success";
+# endif
+
+# if GNULIB_defined_ESOCK /* native Windows platforms with older <errno.h> */
+    case EINPROGRESS:
+      return "Operation now in progress";
+    case EALREADY:
+      return "Operation already in progress";
+    case ENOTSOCK:
+      return "Socket operation on non-socket";
+    case EDESTADDRREQ:
+      return "Destination address required";
+    case EMSGSIZE:
+      return "Message too long";
+    case EPROTOTYPE:
+      return "Protocol wrong type for socket";
+    case ENOPROTOOPT:
+      return "Protocol not available";
+    case EPROTONOSUPPORT:
+      return "Protocol not supported";
+    case EOPNOTSUPP:
+      return "Operation not supported";
+    case EAFNOSUPPORT:
+      return "Address family not supported by protocol";
+    case EADDRINUSE:
+      return "Address already in use";
+    case EADDRNOTAVAIL:
+      return "Cannot assign requested address";
+    case ENETDOWN:
+      return "Network is down";
+    case ENETUNREACH:
+      return "Network is unreachable";
+    case ECONNRESET:
+      return "Connection reset by peer";
+    case ENOBUFS:
+      return "No buffer space available";
+    case EISCONN:
+      return "Transport endpoint is already connected";
+    case ENOTCONN:
+      return "Transport endpoint is not connected";
+    case ETIMEDOUT:
+      return "Connection timed out";
+    case ECONNREFUSED:
+      return "Connection refused";
+    case ELOOP:
+      return "Too many levels of symbolic links";
+    case EHOSTUNREACH:
+      return "No route to host";
+    case EWOULDBLOCK:
+      return "Operation would block";
+# endif
+# if GNULIB_defined_ESTREAMS /* native Windows platforms with older <errno.h> */
+    case ETXTBSY:
+      return "Text file busy";
+    case ENODATA:
+      return "No data available";
+    case ENOSR:
+      return "Out of streams resources";
+    case ENOSTR:
+      return "Device not a stream";
+    case ETIME:
+      return "Timer expired";
+    case EOTHER:
+      return "Other error";
+# endif
+# if GNULIB_defined_EWINSOCK /* native Windows platforms */
+    case ESOCKTNOSUPPORT:
+      return "Socket type not supported";
+    case EPFNOSUPPORT:
+      return "Protocol family not supported";
+    case ESHUTDOWN:
+      return "Cannot send after transport endpoint shutdown";
+    case ETOOMANYREFS:
+      return "Too many references: cannot splice";
+    case EHOSTDOWN:
+      return "Host is down";
+    case EPROCLIM:
+      return "Too many processes";
+    case EUSERS:
+      return "Too many users";
+    case EDQUOT:
+      return "Disk quota exceeded";
+    case ESTALE:
+      return "Stale NFS file handle";
+    case EREMOTE:
+      return "Object is remote";
+#  if HAVE_WINSOCK2_H
+      /* WSA_INVALID_HANDLE maps to EBADF */
+      /* WSA_NOT_ENOUGH_MEMORY maps to ENOMEM */
+      /* WSA_INVALID_PARAMETER maps to EINVAL */
+    case WSA_OPERATION_ABORTED:
+      return "Overlapped operation aborted";
+    case WSA_IO_INCOMPLETE:
+      return "Overlapped I/O event object not in signaled state";
+    case WSA_IO_PENDING:
+      return "Overlapped operations will complete later";
+      /* WSAEINTR maps to EINTR */
+      /* WSAEBADF maps to EBADF */
+      /* WSAEACCES maps to EACCES */
+      /* WSAEFAULT maps to EFAULT */
+      /* WSAEINVAL maps to EINVAL */
+      /* WSAEMFILE maps to EMFILE */
+      /* WSAEWOULDBLOCK maps to EWOULDBLOCK */
+      /* WSAEINPROGRESS maps to EINPROGRESS */
+      /* WSAEALREADY maps to EALREADY */
+      /* WSAENOTSOCK maps to ENOTSOCK */
+      /* WSAEDESTADDRREQ maps to EDESTADDRREQ */
+      /* WSAEMSGSIZE maps to EMSGSIZE */
+      /* WSAEPROTOTYPE maps to EPROTOTYPE */
+      /* WSAENOPROTOOPT maps to ENOPROTOOPT */
+      /* WSAEPROTONOSUPPORT maps to EPROTONOSUPPORT */
+      /* WSAESOCKTNOSUPPORT is ESOCKTNOSUPPORT */
+      /* WSAEOPNOTSUPP maps to EOPNOTSUPP */
+      /* WSAEPFNOSUPPORT is EPFNOSUPPORT */
+      /* WSAEAFNOSUPPORT maps to EAFNOSUPPORT */
+      /* WSAEADDRINUSE maps to EADDRINUSE */
+      /* WSAEADDRNOTAVAIL maps to EADDRNOTAVAIL */
+      /* WSAENETDOWN maps to ENETDOWN */
+      /* WSAENETUNREACH maps to ENETUNREACH */
+      /* WSAENETRESET maps to ENETRESET */
+      /* WSAECONNABORTED maps to ECONNABORTED */
+      /* WSAECONNRESET maps to ECONNRESET */
+      /* WSAENOBUFS maps to ENOBUFS */
+      /* WSAEISCONN maps to EISCONN */
+      /* WSAENOTCONN maps to ENOTCONN */
+      /* WSAESHUTDOWN is ESHUTDOWN */
+      /* WSAETOOMANYREFS is ETOOMANYREFS */
+      /* WSAETIMEDOUT maps to ETIMEDOUT */
+      /* WSAECONNREFUSED maps to ECONNREFUSED */
+      /* WSAELOOP maps to ELOOP */
+      /* WSAENAMETOOLONG maps to ENAMETOOLONG */
+      /* WSAEHOSTDOWN is EHOSTDOWN */
+      /* WSAEHOSTUNREACH maps to EHOSTUNREACH */
+      /* WSAENOTEMPTY maps to ENOTEMPTY */
+      /* WSAEPROCLIM is EPROCLIM */
+      /* WSAEUSERS is EUSERS */
+      /* WSAEDQUOT is EDQUOT */
+      /* WSAESTALE is ESTALE */
+      /* WSAEREMOTE is EREMOTE */
+    case WSASYSNOTREADY:
+      return "Network subsystem is unavailable";
+    case WSAVERNOTSUPPORTED:
+      return "Winsock.dll version out of range";
+    case WSANOTINITIALISED:
+      return "Successful WSAStartup not yet performed";
+    case WSAEDISCON:
+      return "Graceful shutdown in progress";
+    case WSAENOMORE: case WSA_E_NO_MORE:
+      return "No more results";
+    case WSAECANCELLED: case WSA_E_CANCELLED:
+      return "Call was canceled";
+    case WSAEINVALIDPROCTABLE:
+      return "Procedure call table is invalid";
+    case WSAEINVALIDPROVIDER:
+      return "Service provider is invalid";
+    case WSAEPROVIDERFAILEDINIT:
+      return "Service provider failed to initialize";
+    case WSASYSCALLFAILURE:
+      return "System call failure";
+    case WSASERVICE_NOT_FOUND:
+      return "Service not found";
+    case WSATYPE_NOT_FOUND:
+      return "Class type not found";
+    case WSAEREFUSED:
+      return "Database query was refused";
+    case WSAHOST_NOT_FOUND:
+      return "Host not found";
+    case WSATRY_AGAIN:
+      return "Nonauthoritative host not found";
+    case WSANO_RECOVERY:
+      return "Nonrecoverable error";
+    case WSANO_DATA:
+      return "Valid name, no data record of requested type";
+      /* WSA_QOS_* omitted */
+#  endif
+# endif
+
+# if GNULIB_defined_ENOMSG
+    case ENOMSG:
+      return "No message of desired type";
+# endif
+
+# if GNULIB_defined_EIDRM
+    case EIDRM:
+      return "Identifier removed";
+# endif
+
+# if GNULIB_defined_ENOLINK
+    case ENOLINK:
+      return "Link has been severed";
+# endif
+
+# if GNULIB_defined_EPROTO
+    case EPROTO:
+      return "Protocol error";
+# endif
+
+# if GNULIB_defined_EMULTIHOP
+    case EMULTIHOP:
+      return "Multihop attempted";
+# endif
+
+# if GNULIB_defined_EBADMSG
+    case EBADMSG:
+      return "Bad message";
+# endif
+
+# if GNULIB_defined_EOVERFLOW
+    case EOVERFLOW:
+      return "Value too large for defined data type";
+# endif
+
+# if GNULIB_defined_ENOTSUP
+    case ENOTSUP:
+      return "Not supported";
+# endif
+
+# if GNULIB_defined_ENETRESET
+    case ENETRESET:
+      return "Network dropped connection on reset";
+# endif
+
+# if GNULIB_defined_ECONNABORTED
+    case ECONNABORTED:
+      return "Software caused connection abort";
+# endif
+
+# if GNULIB_defined_ESTALE
+    case ESTALE:
+      return "Stale NFS file handle";
+# endif
+
+# if GNULIB_defined_EDQUOT
+    case EDQUOT:
+      return "Disk quota exceeded";
+# endif
+
+# if GNULIB_defined_ECANCELED
+    case ECANCELED:
+      return "Operation canceled";
+# endif
+
+# if GNULIB_defined_EOWNERDEAD
+    case EOWNERDEAD:
+      return "Owner died";
+# endif
+
+# if GNULIB_defined_ENOTRECOVERABLE
+    case ENOTRECOVERABLE:
+      return "State not recoverable";
+# endif
+
+# if GNULIB_defined_EILSEQ
+    case EILSEQ:
+      return "Invalid or incomplete multibyte or wide character";
+# endif
+
+    default:
+      return NULL;
+    }
+}
+
+#endif
diff --git a/src/grep/lib/strerror-override.h b/src/grep/lib/strerror-override.h
new file mode 100644
index 0000000..9cfc5ad
--- /dev/null
+++ b/src/grep/lib/strerror-override.h
@@ -0,0 +1,57 @@
+/* strerror-override.h --- POSIX compatible system error routine
+
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GL_STRERROR_OVERRIDE_H
+# define _GL_STRERROR_OVERRIDE_H
+
+# include <errno.h>
+# include <stddef.h>
+
+/* Reasonable buffer size that should never trigger ERANGE; if this
+   proves too small, we intentionally abort(), to remind us to fix
+   this value.  */
+# define STACKBUF_LEN 256
+
+/* If ERRNUM maps to an errno value defined by gnulib, return a string
+   describing the error.  Otherwise return NULL.  */
+# if REPLACE_STRERROR_0 \
+     || GNULIB_defined_ESOCK \
+     || GNULIB_defined_ESTREAMS \
+     || GNULIB_defined_EWINSOCK \
+     || GNULIB_defined_ENOMSG \
+     || GNULIB_defined_EIDRM \
+     || GNULIB_defined_ENOLINK \
+     || GNULIB_defined_EPROTO \
+     || GNULIB_defined_EMULTIHOP \
+     || GNULIB_defined_EBADMSG \
+     || GNULIB_defined_EOVERFLOW \
+     || GNULIB_defined_ENOTSUP \
+     || GNULIB_defined_ENETRESET \
+     || GNULIB_defined_ECONNABORTED \
+     || GNULIB_defined_ESTALE \
+     || GNULIB_defined_EDQUOT \
+     || GNULIB_defined_ECANCELED \
+     || GNULIB_defined_EOWNERDEAD \
+     || GNULIB_defined_ENOTRECOVERABLE \
+     || GNULIB_defined_EILSEQ
+extern const char *strerror_override (int errnum) _GL_ATTRIBUTE_CONST;
+# else
+#  define strerror_override(ignored) NULL
+#  define GNULIB_defined_strerror_override_macro 1
+# endif
+
+#endif /* _GL_STRERROR_OVERRIDE_H */
diff --git a/src/grep/lib/strerror.c b/src/grep/lib/strerror.c
new file mode 100644
index 0000000..83926df
--- /dev/null
+++ b/src/grep/lib/strerror.c
@@ -0,0 +1,71 @@
+/* strerror.c --- POSIX compatible system error routine
+
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <string.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "intprops.h"
+#include "strerror-override.h"
+#include "verify.h"
+
+/* Use the system functions, not the gnulib overrides in this file.  */
+#undef sprintf
+
+char *
+strerror (int n)
+#undef strerror
+{
+  static char buf[STACKBUF_LEN];
+  size_t len;
+
+  /* Cast away const, due to the historical signature of strerror;
+     callers should not be modifying the string.  */
+  const char *msg = strerror_override (n);
+  if (msg)
+    return (char *) msg;
+
+  msg = strerror (n);
+
+  /* Our strerror_r implementation might use the system's strerror
+     buffer, so all other clients of strerror have to see the error
+     copied into a buffer that we manage.  This is not thread-safe,
+     even if the system strerror is, but portable programs shouldn't
+     be using strerror if they care about thread-safety.  */
+  if (!msg || !*msg)
+    {
+      static char const fmt[] = "Unknown error %d";
+      verify (sizeof buf >= sizeof (fmt) + INT_STRLEN_BOUND (n));
+      sprintf (buf, fmt, n);
+      errno = EINVAL;
+      return buf;
+    }
+
+  /* Fix STACKBUF_LEN if this ever aborts.  */
+  len = strlen (msg);
+  if (sizeof buf <= len)
+    abort ();
+
+  memcpy (buf, msg, len + 1);
+  return buf;
+}
diff --git a/src/grep/lib/striconv.c b/src/grep/lib/striconv.c
new file mode 100644
index 0000000..b92bdc9
--- /dev/null
+++ b/src/grep/lib/striconv.c
@@ -0,0 +1,451 @@
+/* Charset conversion.
+   Copyright (C) 2001-2007, 2010-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible and Simon Josefsson.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "striconv.h"
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if HAVE_ICONV
+# include <iconv.h>
+/* Get MB_LEN_MAX, CHAR_BIT.  */
+# include <limits.h>
+#endif
+
+#include "c-strcase.h"
+
+#ifndef SIZE_MAX
+# define SIZE_MAX ((size_t) -1)
+#endif
+
+
+#if HAVE_ICONV
+
+int
+mem_cd_iconv (const char *src, size_t srclen, iconv_t cd,
+              char **resultp, size_t *lengthp)
+{
+# define tmpbufsize 4096
+  size_t length;
+  char *result;
+
+  /* Avoid glibc-2.1 bug and Solaris 2.7-2.9 bug.  */
+# if defined _LIBICONV_VERSION \
+     || !(((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \
+          || defined __sun)
+  /* Set to the initial state.  */
+  iconv (cd, NULL, NULL, NULL, NULL);
+# endif
+
+  /* Determine the length we need.  */
+  {
+    size_t count = 0;
+    /* The alignment is needed when converting e.g. to glibc's WCHAR_T or
+       libiconv's UCS-4-INTERNAL encoding.  */
+    union { unsigned int align; char buf[tmpbufsize]; } tmp;
+# define tmpbuf tmp.buf
+    const char *inptr = src;
+    size_t insize = srclen;
+
+    while (insize > 0)
+      {
+        char *outptr = tmpbuf;
+        size_t outsize = tmpbufsize;
+        size_t res = iconv (cd,
+                            (ICONV_CONST char **) &inptr, &insize,
+                            &outptr, &outsize);
+
+        if (res == (size_t)(-1))
+          {
+            if (errno == E2BIG)
+              ;
+            else if (errno == EINVAL)
+              break;
+            else
+              return -1;
+          }
+# if !defined _LIBICONV_VERSION && !(defined __GLIBC__ && !defined __UCLIBC__)
+        /* Irix iconv() inserts a NUL byte if it cannot convert.
+           NetBSD iconv() inserts a question mark if it cannot convert.
+           Only GNU libiconv and GNU libc are known to prefer to fail rather
+           than doing a lossy conversion.  */
+        else if (res > 0)
+          {
+            errno = EILSEQ;
+            return -1;
+          }
+# endif
+        count += outptr - tmpbuf;
+      }
+    /* Avoid glibc-2.1 bug and Solaris 2.7 bug.  */
+# if defined _LIBICONV_VERSION \
+     || !(((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \
+          || defined __sun)
+    {
+      char *outptr = tmpbuf;
+      size_t outsize = tmpbufsize;
+      size_t res = iconv (cd, NULL, NULL, &outptr, &outsize);
+
+      if (res == (size_t)(-1))
+        return -1;
+      count += outptr - tmpbuf;
+    }
+# endif
+    length = count;
+# undef tmpbuf
+  }
+
+  if (length == 0)
+    {
+      *lengthp = 0;
+      return 0;
+    }
+  if (*resultp != NULL && *lengthp >= length)
+    result = *resultp;
+  else
+    {
+      result = (char *) malloc (length);
+      if (result == NULL)
+        {
+          errno = ENOMEM;
+          return -1;
+        }
+    }
+
+  /* Avoid glibc-2.1 bug and Solaris 2.7-2.9 bug.  */
+# if defined _LIBICONV_VERSION \
+     || !(((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \
+          || defined __sun)
+  /* Return to the initial state.  */
+  iconv (cd, NULL, NULL, NULL, NULL);
+# endif
+
+  /* Do the conversion for real.  */
+  {
+    const char *inptr = src;
+    size_t insize = srclen;
+    char *outptr = result;
+    size_t outsize = length;
+
+    while (insize > 0)
+      {
+        size_t res = iconv (cd,
+                            (ICONV_CONST char **) &inptr, &insize,
+                            &outptr, &outsize);
+
+        if (res == (size_t)(-1))
+          {
+            if (errno == EINVAL)
+              break;
+            else
+              goto fail;
+          }
+# if !defined _LIBICONV_VERSION && !(defined __GLIBC__ && !defined __UCLIBC__)
+        /* Irix iconv() inserts a NUL byte if it cannot convert.
+           NetBSD iconv() inserts a question mark if it cannot convert.
+           Only GNU libiconv and GNU libc are known to prefer to fail rather
+           than doing a lossy conversion.  */
+        else if (res > 0)
+          {
+            errno = EILSEQ;
+            goto fail;
+          }
+# endif
+      }
+    /* Avoid glibc-2.1 bug and Solaris 2.7 bug.  */
+# if defined _LIBICONV_VERSION \
+     || !(((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \
+          || defined __sun)
+    {
+      size_t res = iconv (cd, NULL, NULL, &outptr, &outsize);
+
+      if (res == (size_t)(-1))
+        goto fail;
+    }
+# endif
+    if (outsize != 0)
+      abort ();
+  }
+
+  *resultp = result;
+  *lengthp = length;
+
+  return 0;
+
+ fail:
+  {
+    if (result != *resultp)
+      free (result);
+    return -1;
+  }
+# undef tmpbufsize
+}
+
+char *
+str_cd_iconv (const char *src, iconv_t cd)
+{
+  /* For most encodings, a trailing NUL byte in the input will be converted
+     to a trailing NUL byte in the output.  But not for UTF-7.  So that this
+     function is usable for UTF-7, we have to exclude the NUL byte from the
+     conversion and add it by hand afterwards.  */
+# if !defined _LIBICONV_VERSION && !(defined __GLIBC__ && !defined __UCLIBC__)
+  /* Irix iconv() inserts a NUL byte if it cannot convert.
+     NetBSD iconv() inserts a question mark if it cannot convert.
+     Only GNU libiconv and GNU libc are known to prefer to fail rather
+     than doing a lossy conversion.  For other iconv() implementations,
+     we have to look at the number of irreversible conversions returned;
+     but this information is lost when iconv() returns for an E2BIG reason.
+     Therefore we cannot use the second, faster algorithm.  */
+
+  char *result = NULL;
+  size_t length = 0;
+  int retval = mem_cd_iconv (src, strlen (src), cd, &result, &length);
+  char *final_result;
+
+  if (retval < 0)
+    {
+      if (result != NULL)
+        abort ();
+      return NULL;
+    }
+
+  /* Add the terminating NUL byte.  */
+  final_result =
+    (result != NULL ? realloc (result, length + 1) : malloc (length + 1));
+  if (final_result == NULL)
+    {
+      free (result);
+      errno = ENOMEM;
+      return NULL;
+    }
+  final_result[length] = '\0';
+
+  return final_result;
+
+# else
+  /* This algorithm is likely faster than the one above.  But it may produce
+     iconv() returns for an E2BIG reason, when the output size guess is too
+     small.  Therefore it can only be used when we don't need the number of
+     irreversible conversions performed.  */
+  char *result;
+  size_t result_size;
+  size_t length;
+  const char *inptr = src;
+  size_t inbytes_remaining = strlen (src);
+
+  /* Make a guess for the worst-case output size, in order to avoid a
+     realloc.  It's OK if the guess is wrong as long as it is not zero and
+     doesn't lead to an integer overflow.  */
+  result_size = inbytes_remaining;
+  {
+    size_t approx_sqrt_SIZE_MAX = SIZE_MAX >> (sizeof (size_t) * CHAR_BIT / 2);
+    if (result_size <= approx_sqrt_SIZE_MAX / MB_LEN_MAX)
+      result_size *= MB_LEN_MAX;
+  }
+  result_size += 1; /* for the terminating NUL */
+
+  result = (char *) malloc (result_size);
+  if (result == NULL)
+    {
+      errno = ENOMEM;
+      return NULL;
+    }
+
+  /* Avoid glibc-2.1 bug and Solaris 2.7-2.9 bug.  */
+# if defined _LIBICONV_VERSION \
+     || !(((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \
+          || defined __sun)
+  /* Set to the initial state.  */
+  iconv (cd, NULL, NULL, NULL, NULL);
+# endif
+
+  /* Do the conversion.  */
+  {
+    char *outptr = result;
+    size_t outbytes_remaining = result_size - 1;
+
+    for (;;)
+      {
+        /* Here inptr + inbytes_remaining = src + strlen (src),
+                outptr + outbytes_remaining = result + result_size - 1.  */
+        size_t res = iconv (cd,
+                            (ICONV_CONST char **) &inptr, &inbytes_remaining,
+                            &outptr, &outbytes_remaining);
+
+        if (res == (size_t)(-1))
+          {
+            if (errno == EINVAL)
+              break;
+            else if (errno == E2BIG)
+              {
+                size_t used = outptr - result;
+                size_t newsize = result_size * 2;
+                char *newresult;
+
+                if (!(newsize > result_size))
+                  {
+                    errno = ENOMEM;
+                    goto failed;
+                  }
+                newresult = (char *) realloc (result, newsize);
+                if (newresult == NULL)
+                  {
+                    errno = ENOMEM;
+                    goto failed;
+                  }
+                result = newresult;
+                result_size = newsize;
+                outptr = result + used;
+                outbytes_remaining = result_size - 1 - used;
+              }
+            else
+              goto failed;
+          }
+        else
+          break;
+      }
+    /* Avoid glibc-2.1 bug and Solaris 2.7 bug.  */
+# if defined _LIBICONV_VERSION \
+     || !(((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \
+          || defined __sun)
+    for (;;)
+      {
+        /* Here outptr + outbytes_remaining = result + result_size - 1.  */
+        size_t res = iconv (cd, NULL, NULL, &outptr, &outbytes_remaining);
+
+        if (res == (size_t)(-1))
+          {
+            if (errno == E2BIG)
+              {
+                size_t used = outptr - result;
+                size_t newsize = result_size * 2;
+                char *newresult;
+
+                if (!(newsize > result_size))
+                  {
+                    errno = ENOMEM;
+                    goto failed;
+                  }
+                newresult = (char *) realloc (result, newsize);
+                if (newresult == NULL)
+                  {
+                    errno = ENOMEM;
+                    goto failed;
+                  }
+                result = newresult;
+                result_size = newsize;
+                outptr = result + used;
+                outbytes_remaining = result_size - 1 - used;
+              }
+            else
+              goto failed;
+          }
+        else
+          break;
+      }
+# endif
+
+    /* Add the terminating NUL byte.  */
+    *outptr++ = '\0';
+
+    length = outptr - result;
+  }
+
+  /* Give away unused memory.  */
+  if (length < result_size)
+    {
+      char *smaller_result = (char *) realloc (result, length);
+
+      if (smaller_result != NULL)
+        result = smaller_result;
+    }
+
+  return result;
+
+ failed:
+  free (result);
+  return NULL;
+
+# endif
+}
+
+#endif
+
+char *
+str_iconv (const char *src, const char *from_codeset, const char *to_codeset)
+{
+  if (*src == '\0' || c_strcasecmp (from_codeset, to_codeset) == 0)
+    {
+      char *result = strdup (src);
+
+      if (result == NULL)
+        errno = ENOMEM;
+      return result;
+    }
+  else
+    {
+#if HAVE_ICONV
+      iconv_t cd;
+      char *result;
+
+      /* Avoid glibc-2.1 bug with EUC-KR.  */
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \
+     && !defined _LIBICONV_VERSION
+      if (c_strcasecmp (from_codeset, "EUC-KR") == 0
+          || c_strcasecmp (to_codeset, "EUC-KR") == 0)
+        {
+          errno = EINVAL;
+          return NULL;
+        }
+# endif
+      cd = iconv_open (to_codeset, from_codeset);
+      if (cd == (iconv_t) -1)
+        return NULL;
+
+      result = str_cd_iconv (src, cd);
+
+      if (result == NULL)
+        {
+          /* Close cd, but preserve the errno from str_cd_iconv.  */
+          int saved_errno = errno;
+          iconv_close (cd);
+          errno = saved_errno;
+        }
+      else
+        {
+          if (iconv_close (cd) < 0)
+            {
+              free (result);
+              return NULL;
+            }
+        }
+      return result;
+#else
+      /* This is a different error code than if iconv_open existed but didn't
+         support from_codeset and to_codeset, so that the caller can emit
+         an error message such as
+           "iconv() is not supported. Installing GNU libiconv and
+            then reinstalling this package would fix this."  */
+      errno = ENOSYS;
+      return NULL;
+#endif
+    }
+}
diff --git a/src/grep/lib/striconv.h b/src/grep/lib/striconv.h
new file mode 100644
index 0000000..c192ee1
--- /dev/null
+++ b/src/grep/lib/striconv.h
@@ -0,0 +1,77 @@
+/* Charset conversion.
+   Copyright (C) 2001-2004, 2006-2007, 2009-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible and Simon Josefsson.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _STRICONV_H
+#define _STRICONV_H
+
+#include <stdlib.h>
+#if HAVE_ICONV
+#include <iconv.h>
+#endif
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+#if HAVE_ICONV
+
+/* Convert an entire string from one encoding to another, using iconv.
+   The original string is at [SRC,...,SRC+SRCLEN-1].
+   The conversion descriptor is passed as CD.
+   *RESULTP and *LENGTH should initially be a scratch buffer and its size,
+   or *RESULTP can initially be NULL.
+   May erase the contents of the memory at *RESULTP.
+   Return value: 0 if successful, otherwise -1 and errno set.
+   If successful: The resulting string is stored in *RESULTP and its length
+   in *LENGTHP.  *RESULTP is set to a freshly allocated memory block, or is
+   unchanged if no dynamic memory allocation was necessary.  */
+extern int mem_cd_iconv (const char *src, size_t srclen, iconv_t cd,
+                         char **resultp, size_t *lengthp);
+
+/* Convert an entire string from one encoding to another, using iconv.
+   The original string is the NUL-terminated string starting at SRC.
+   The conversion descriptor is passed as CD.  Both the "from" and the "to"
+   encoding must use a single NUL byte at the end of the string (i.e. not
+   UCS-2, UCS-4, UTF-16, UTF-32).
+   Allocate a malloced memory block for the result.
+   Return value: the freshly allocated resulting NUL-terminated string if
+   successful, otherwise NULL and errno set.  */
+extern char * str_cd_iconv (const char *src, iconv_t cd)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE;
+
+#endif
+
+/* Convert an entire string from one encoding to another, using iconv.
+   The original string is the NUL-terminated string starting at SRC.
+   Both the "from" and the "to" encoding must use a single NUL byte at the
+   end of the string (i.e. not UCS-2, UCS-4, UTF-16, UTF-32).
+   Allocate a malloced memory block for the result.
+   Return value: the freshly allocated resulting NUL-terminated string if
+   successful, otherwise NULL and errno set.  */
+extern char * str_iconv (const char *src,
+                         const char *from_codeset, const char *to_codeset)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE;
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* _STRICONV_H */
diff --git a/src/grep/lib/string.in.h b/src/grep/lib/string.in.h
new file mode 100644
index 0000000..b043c75
--- /dev/null
+++ b/src/grep/lib/string.in.h
@@ -0,0 +1,1207 @@
+/* A GNU-like <string.h>.
+
+   Copyright (C) 1995-1996, 2001-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if defined _GL_ALREADY_INCLUDING_STRING_H
+/* Special invocation convention:
+   - On OS X/NetBSD we have a sequence of nested includes
+       <string.h> -> <strings.h> -> "string.h"
+     In this situation system _chk variants due to -D_FORTIFY_SOURCE
+     might be used after any replacements defined here.  */
+
+#@INCLUDE_NEXT@ @NEXT_STRING_H@
+
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_STRING_H
+
+#define _GL_ALREADY_INCLUDING_STRING_H
+
+/* The include_next requires a split double-inclusion guard.  */
+#@INCLUDE_NEXT@ @NEXT_STRING_H@
+
+#undef _GL_ALREADY_INCLUDING_STRING_H
+
+#ifndef _@GUARD_PREFIX@_STRING_H
+#define _@GUARD_PREFIX@_STRING_H
+
+/* NetBSD 5.0 mis-defines NULL.  */
+#include <stddef.h>
+
+/* Get free().  */
+#include <stdlib.h>
+
+/* MirBSD defines mbslen as a macro.  */
+#if @GNULIB_MBSLEN@ && defined __MirBSD__
+# include <wchar.h>
+#endif
+
+/* The __attribute__ feature is available in gcc versions 2.5 and later.
+   The attribute __pure__ was added in gcc 2.96.  */
+#ifndef _GL_ATTRIBUTE_PURE
+# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96) || defined __clang__
+#  define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+# else
+#  define _GL_ATTRIBUTE_PURE /* empty */
+# endif
+#endif
+
+/* NetBSD 5.0 declares strsignal in <unistd.h>, not in <string.h>.  */
+/* But in any case avoid namespace pollution on glibc systems.  */
+#if (@GNULIB_STRSIGNAL@ || defined GNULIB_POSIXCHECK) && defined __NetBSD__ \
+    && ! defined __GLIBC__
+# include <unistd.h>
+#endif
+
+/* AIX 7.2 declares ffsl and ffsll in <strings.h>, not in <string.h>.  */
+/* But in any case avoid namespace pollution on glibc systems.  */
+#if ((@GNULIB_FFSL@ || @GNULIB_FFSLL@ || defined GNULIB_POSIXCHECK) \
+     && defined _AIX) \
+    && ! defined __GLIBC__
+# include <strings.h>
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+
+/* Clear a block of memory.  The compiler will not delete a call to
+   this function, even if the block is dead after the call.  */
+#if @GNULIB_EXPLICIT_BZERO@
+# if ! @HAVE_EXPLICIT_BZERO@
+_GL_FUNCDECL_SYS (explicit_bzero, void,
+                  (void *__dest, size_t __n) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (explicit_bzero, void, (void *__dest, size_t __n));
+_GL_CXXALIASWARN (explicit_bzero);
+#elif defined GNULIB_POSIXCHECK
+# undef explicit_bzero
+# if HAVE_RAW_DECL_EXPLICIT_BZERO
+_GL_WARN_ON_USE (explicit_bzero, "explicit_bzero is unportable - "
+                 "use gnulib module explicit_bzero for portability");
+# endif
+#endif
+
+/* Find the index of the least-significant set bit.  */
+#if @GNULIB_FFSL@
+# if !@HAVE_FFSL@
+_GL_FUNCDECL_SYS (ffsl, int, (long int i));
+# endif
+_GL_CXXALIAS_SYS (ffsl, int, (long int i));
+_GL_CXXALIASWARN (ffsl);
+#elif defined GNULIB_POSIXCHECK
+# undef ffsl
+# if HAVE_RAW_DECL_FFSL
+_GL_WARN_ON_USE (ffsl, "ffsl is not portable - use the ffsl module");
+# endif
+#endif
+
+
+/* Find the index of the least-significant set bit.  */
+#if @GNULIB_FFSLL@
+# if @REPLACE_FFSLL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define ffsll rpl_ffsll
+#  endif
+_GL_FUNCDECL_RPL (ffsll, int, (long long int i));
+_GL_CXXALIAS_RPL (ffsll, int, (long long int i));
+# else
+#  if !@HAVE_FFSLL@
+_GL_FUNCDECL_SYS (ffsll, int, (long long int i));
+#  endif
+_GL_CXXALIAS_SYS (ffsll, int, (long long int i));
+# endif
+_GL_CXXALIASWARN (ffsll);
+#elif defined GNULIB_POSIXCHECK
+# undef ffsll
+# if HAVE_RAW_DECL_FFSLL
+_GL_WARN_ON_USE (ffsll, "ffsll is not portable - use the ffsll module");
+# endif
+#endif
+
+
+#if @GNULIB_MDA_MEMCCPY@
+/* On native Windows, map 'memccpy' to '_memccpy', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::memccpy always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef memccpy
+#   define memccpy _memccpy
+#  endif
+_GL_CXXALIAS_MDA (memccpy, void *,
+                  (void *dest, const void *src, int c, size_t n));
+# else
+_GL_CXXALIAS_SYS (memccpy, void *,
+                  (void *dest, const void *src, int c, size_t n));
+# endif
+_GL_CXXALIASWARN (memccpy);
+#endif
+
+
+/* Return the first instance of C within N bytes of S, or NULL.  */
+#if @GNULIB_MEMCHR@
+# if @REPLACE_MEMCHR@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef memchr
+#   define memchr rpl_memchr
+#  endif
+_GL_FUNCDECL_RPL (memchr, void *, (void const *__s, int __c, size_t __n)
+                                  _GL_ATTRIBUTE_PURE
+                                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (memchr, void *, (void const *__s, int __c, size_t __n));
+# else
+  /* On some systems, this function is defined as an overloaded function:
+       extern "C" { const void * std::memchr (const void *, int, size_t); }
+       extern "C++" { void * std::memchr (void *, int, size_t); }  */
+_GL_CXXALIAS_SYS_CAST2 (memchr,
+                        void *, (void const *__s, int __c, size_t __n),
+                        void const *, (void const *__s, int __c, size_t __n));
+# endif
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+     && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (memchr, void *, (void *__s, int __c, size_t __n));
+_GL_CXXALIASWARN1 (memchr, void const *,
+                   (void const *__s, int __c, size_t __n));
+# elif __GLIBC__ >= 2
+_GL_CXXALIASWARN (memchr);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef memchr
+/* Assume memchr is always declared.  */
+_GL_WARN_ON_USE (memchr, "memchr has platform-specific bugs - "
+                 "use gnulib module memchr for portability" );
+#endif
+
+/* Return the first occurrence of NEEDLE in HAYSTACK.  */
+#if @GNULIB_MEMMEM@
+# if @REPLACE_MEMMEM@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define memmem rpl_memmem
+#  endif
+_GL_FUNCDECL_RPL (memmem, void *,
+                  (void const *__haystack, size_t __haystack_len,
+                   void const *__needle, size_t __needle_len)
+                  _GL_ATTRIBUTE_PURE
+                  _GL_ARG_NONNULL ((1, 3)));
+_GL_CXXALIAS_RPL (memmem, void *,
+                  (void const *__haystack, size_t __haystack_len,
+                   void const *__needle, size_t __needle_len));
+# else
+#  if ! @HAVE_DECL_MEMMEM@
+_GL_FUNCDECL_SYS (memmem, void *,
+                  (void const *__haystack, size_t __haystack_len,
+                   void const *__needle, size_t __needle_len)
+                  _GL_ATTRIBUTE_PURE
+                  _GL_ARG_NONNULL ((1, 3)));
+#  endif
+_GL_CXXALIAS_SYS (memmem, void *,
+                  (void const *__haystack, size_t __haystack_len,
+                   void const *__needle, size_t __needle_len));
+# endif
+_GL_CXXALIASWARN (memmem);
+#elif defined GNULIB_POSIXCHECK
+# undef memmem
+# if HAVE_RAW_DECL_MEMMEM
+_GL_WARN_ON_USE (memmem, "memmem is unportable and often quadratic - "
+                 "use gnulib module memmem-simple for portability, "
+                 "and module memmem for speed" );
+# endif
+#endif
+
+/* Copy N bytes of SRC to DEST, return pointer to bytes after the
+   last written byte.  */
+#if @GNULIB_MEMPCPY@
+# if ! @HAVE_MEMPCPY@
+_GL_FUNCDECL_SYS (mempcpy, void *,
+                  (void *restrict __dest, void const *restrict __src,
+                   size_t __n)
+                  _GL_ARG_NONNULL ((1, 2)));
+# endif
+_GL_CXXALIAS_SYS (mempcpy, void *,
+                  (void *restrict __dest, void const *restrict __src,
+                   size_t __n));
+_GL_CXXALIASWARN (mempcpy);
+#elif defined GNULIB_POSIXCHECK
+# undef mempcpy
+# if HAVE_RAW_DECL_MEMPCPY
+_GL_WARN_ON_USE (mempcpy, "mempcpy is unportable - "
+                 "use gnulib module mempcpy for portability");
+# endif
+#endif
+
+/* Search backwards through a block for a byte (specified as an int).  */
+#if @GNULIB_MEMRCHR@
+# if ! @HAVE_DECL_MEMRCHR@
+_GL_FUNCDECL_SYS (memrchr, void *, (void const *, int, size_t)
+                                   _GL_ATTRIBUTE_PURE
+                                   _GL_ARG_NONNULL ((1)));
+# endif
+  /* On some systems, this function is defined as an overloaded function:
+       extern "C++" { const void * std::memrchr (const void *, int, size_t); }
+       extern "C++" { void * std::memrchr (void *, int, size_t); }  */
+_GL_CXXALIAS_SYS_CAST2 (memrchr,
+                        void *, (void const *, int, size_t),
+                        void const *, (void const *, int, size_t));
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+     && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (memrchr, void *, (void *, int, size_t));
+_GL_CXXALIASWARN1 (memrchr, void const *, (void const *, int, size_t));
+# else
+_GL_CXXALIASWARN (memrchr);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef memrchr
+# if HAVE_RAW_DECL_MEMRCHR
+_GL_WARN_ON_USE (memrchr, "memrchr is unportable - "
+                 "use gnulib module memrchr for portability");
+# endif
+#endif
+
+/* Find the first occurrence of C in S.  More efficient than
+   memchr(S,C,N), at the expense of undefined behavior if C does not
+   occur within N bytes.  */
+#if @GNULIB_RAWMEMCHR@
+# if ! @HAVE_RAWMEMCHR@
+_GL_FUNCDECL_SYS (rawmemchr, void *, (void const *__s, int __c_in)
+                                     _GL_ATTRIBUTE_PURE
+                                     _GL_ARG_NONNULL ((1)));
+# endif
+  /* On some systems, this function is defined as an overloaded function:
+       extern "C++" { const void * std::rawmemchr (const void *, int); }
+       extern "C++" { void * std::rawmemchr (void *, int); }  */
+_GL_CXXALIAS_SYS_CAST2 (rawmemchr,
+                        void *, (void const *__s, int __c_in),
+                        void const *, (void const *__s, int __c_in));
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+     && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (rawmemchr, void *, (void *__s, int __c_in));
+_GL_CXXALIASWARN1 (rawmemchr, void const *, (void const *__s, int __c_in));
+# else
+_GL_CXXALIASWARN (rawmemchr);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef rawmemchr
+# if HAVE_RAW_DECL_RAWMEMCHR
+_GL_WARN_ON_USE (rawmemchr, "rawmemchr is unportable - "
+                 "use gnulib module rawmemchr for portability");
+# endif
+#endif
+
+/* Copy SRC to DST, returning the address of the terminating '\0' in DST.  */
+#if @GNULIB_STPCPY@
+# if ! @HAVE_STPCPY@
+_GL_FUNCDECL_SYS (stpcpy, char *,
+                  (char *restrict __dst, char const *restrict __src)
+                  _GL_ARG_NONNULL ((1, 2)));
+# endif
+_GL_CXXALIAS_SYS (stpcpy, char *,
+                  (char *restrict __dst, char const *restrict __src));
+_GL_CXXALIASWARN (stpcpy);
+#elif defined GNULIB_POSIXCHECK
+# undef stpcpy
+# if HAVE_RAW_DECL_STPCPY
+_GL_WARN_ON_USE (stpcpy, "stpcpy is unportable - "
+                 "use gnulib module stpcpy for portability");
+# endif
+#endif
+
+/* Copy no more than N bytes of SRC to DST, returning a pointer past the
+   last non-NUL byte written into DST.  */
+#if @GNULIB_STPNCPY@
+# if @REPLACE_STPNCPY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef stpncpy
+#   define stpncpy rpl_stpncpy
+#  endif
+_GL_FUNCDECL_RPL (stpncpy, char *,
+                  (char *restrict __dst, char const *restrict __src,
+                   size_t __n)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (stpncpy, char *,
+                  (char *restrict __dst, char const *restrict __src,
+                   size_t __n));
+# else
+#  if ! @HAVE_STPNCPY@
+_GL_FUNCDECL_SYS (stpncpy, char *,
+                  (char *restrict __dst, char const *restrict __src,
+                   size_t __n)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (stpncpy, char *,
+                  (char *restrict __dst, char const *restrict __src,
+                   size_t __n));
+# endif
+_GL_CXXALIASWARN (stpncpy);
+#elif defined GNULIB_POSIXCHECK
+# undef stpncpy
+# if HAVE_RAW_DECL_STPNCPY
+_GL_WARN_ON_USE (stpncpy, "stpncpy is unportable - "
+                 "use gnulib module stpncpy for portability");
+# endif
+#endif
+
+#if defined GNULIB_POSIXCHECK
+/* strchr() does not work with multibyte strings if the locale encoding is
+   GB18030 and the character to be searched is a digit.  */
+# undef strchr
+/* Assume strchr is always declared.  */
+_GL_WARN_ON_USE_CXX (strchr,
+                     const char *, char *, (const char *, int),
+                     "strchr cannot work correctly on character strings "
+                     "in some multibyte locales - "
+                     "use mbschr if you care about internationalization");
+#endif
+
+/* Find the first occurrence of C in S or the final NUL byte.  */
+#if @GNULIB_STRCHRNUL@
+# if @REPLACE_STRCHRNUL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define strchrnul rpl_strchrnul
+#  endif
+_GL_FUNCDECL_RPL (strchrnul, char *, (const char *__s, int __c_in)
+                                     _GL_ATTRIBUTE_PURE
+                                     _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (strchrnul, char *,
+                  (const char *str, int ch));
+# else
+#  if ! @HAVE_STRCHRNUL@
+_GL_FUNCDECL_SYS (strchrnul, char *, (char const *__s, int __c_in)
+                                     _GL_ATTRIBUTE_PURE
+                                     _GL_ARG_NONNULL ((1)));
+#  endif
+  /* On some systems, this function is defined as an overloaded function:
+       extern "C++" { const char * std::strchrnul (const char *, int); }
+       extern "C++" { char * std::strchrnul (char *, int); }  */
+_GL_CXXALIAS_SYS_CAST2 (strchrnul,
+                        char *, (char const *__s, int __c_in),
+                        char const *, (char const *__s, int __c_in));
+# endif
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+     && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (strchrnul, char *, (char *__s, int __c_in));
+_GL_CXXALIASWARN1 (strchrnul, char const *, (char const *__s, int __c_in));
+# else
+_GL_CXXALIASWARN (strchrnul);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strchrnul
+# if HAVE_RAW_DECL_STRCHRNUL
+_GL_WARN_ON_USE (strchrnul, "strchrnul is unportable - "
+                 "use gnulib module strchrnul for portability");
+# endif
+#endif
+
+/* Duplicate S, returning an identical malloc'd string.  */
+#if @GNULIB_STRDUP@
+# if @REPLACE_STRDUP@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef strdup
+#   define strdup rpl_strdup
+#  endif
+_GL_FUNCDECL_RPL (strdup, char *,
+                  (char const *__s)
+                  _GL_ARG_NONNULL ((1))
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+_GL_CXXALIAS_RPL (strdup, char *, (char const *__s));
+# elif defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef strdup
+#   define strdup _strdup
+#  endif
+_GL_CXXALIAS_MDA (strdup, char *, (char const *__s));
+# else
+#  if defined __cplusplus && defined GNULIB_NAMESPACE && defined strdup
+    /* strdup exists as a function and as a macro.  Get rid of the macro.  */
+#   undef strdup
+#  endif
+#  if (!@HAVE_DECL_STRDUP@ || __GNUC__ >= 11) && !defined strdup
+_GL_FUNCDECL_SYS (strdup, char *,
+                  (char const *__s)
+                  _GL_ARG_NONNULL ((1))
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+#  endif
+_GL_CXXALIAS_SYS (strdup, char *, (char const *__s));
+# endif
+_GL_CXXALIASWARN (strdup);
+#else
+# if __GNUC__ >= 11 && !defined strdup
+/* For -Wmismatched-dealloc: Associate strdup with free or rpl_free.  */
+_GL_FUNCDECL_SYS (strdup, char *,
+                  (char const *__s)
+                  _GL_ARG_NONNULL ((1))
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+# endif
+# if defined GNULIB_POSIXCHECK
+#  undef strdup
+#  if HAVE_RAW_DECL_STRDUP
+_GL_WARN_ON_USE (strdup, "strdup is unportable - "
+                 "use gnulib module strdup for portability");
+#  endif
+# elif @GNULIB_MDA_STRDUP@
+/* On native Windows, map 'creat' to '_creat', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::strdup always.  */
+#  if defined _WIN32 && !defined __CYGWIN__
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    undef strdup
+#    define strdup _strdup
+#   endif
+_GL_CXXALIAS_MDA (strdup, char *, (char const *__s));
+#  else
+#   if defined __cplusplus && defined GNULIB_NAMESPACE && defined strdup
+#    undef strdup
+#   endif
+_GL_CXXALIAS_SYS (strdup, char *, (char const *__s));
+#  endif
+_GL_CXXALIASWARN (strdup);
+# endif
+#endif
+
+/* Append no more than N characters from SRC onto DEST.  */
+#if @GNULIB_STRNCAT@
+# if @REPLACE_STRNCAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef strncat
+#   define strncat rpl_strncat
+#  endif
+_GL_FUNCDECL_RPL (strncat, char *,
+                  (char *restrict dest, const char *restrict src, size_t n)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (strncat, char *,
+                  (char *restrict dest, const char *restrict src, size_t n));
+# else
+_GL_CXXALIAS_SYS (strncat, char *,
+                  (char *restrict dest, const char *restrict src, size_t n));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (strncat);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strncat
+# if HAVE_RAW_DECL_STRNCAT
+_GL_WARN_ON_USE (strncat, "strncat is unportable - "
+                 "use gnulib module strncat for portability");
+# endif
+#endif
+
+/* Return a newly allocated copy of at most N bytes of STRING.  */
+#if @GNULIB_STRNDUP@
+# if @REPLACE_STRNDUP@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef strndup
+#   define strndup rpl_strndup
+#  endif
+_GL_FUNCDECL_RPL (strndup, char *, (char const *__s, size_t __n)
+                                   _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (strndup, char *, (char const *__s, size_t __n));
+# else
+#  if ! @HAVE_DECL_STRNDUP@
+_GL_FUNCDECL_SYS (strndup, char *, (char const *__s, size_t __n)
+                                   _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (strndup, char *, (char const *__s, size_t __n));
+# endif
+_GL_CXXALIASWARN (strndup);
+#elif defined GNULIB_POSIXCHECK
+# undef strndup
+# if HAVE_RAW_DECL_STRNDUP
+_GL_WARN_ON_USE (strndup, "strndup is unportable - "
+                 "use gnulib module strndup for portability");
+# endif
+#endif
+
+/* Find the length (number of bytes) of STRING, but scan at most
+   MAXLEN bytes.  If no '\0' terminator is found in that many bytes,
+   return MAXLEN.  */
+#if @GNULIB_STRNLEN@
+# if @REPLACE_STRNLEN@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef strnlen
+#   define strnlen rpl_strnlen
+#  endif
+_GL_FUNCDECL_RPL (strnlen, size_t, (char const *__s, size_t __maxlen)
+                                   _GL_ATTRIBUTE_PURE
+                                   _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (strnlen, size_t, (char const *__s, size_t __maxlen));
+# else
+#  if ! @HAVE_DECL_STRNLEN@
+_GL_FUNCDECL_SYS (strnlen, size_t, (char const *__s, size_t __maxlen)
+                                   _GL_ATTRIBUTE_PURE
+                                   _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (strnlen, size_t, (char const *__s, size_t __maxlen));
+# endif
+_GL_CXXALIASWARN (strnlen);
+#elif defined GNULIB_POSIXCHECK
+# undef strnlen
+# if HAVE_RAW_DECL_STRNLEN
+_GL_WARN_ON_USE (strnlen, "strnlen is unportable - "
+                 "use gnulib module strnlen for portability");
+# endif
+#endif
+
+#if defined GNULIB_POSIXCHECK
+/* strcspn() assumes the second argument is a list of single-byte characters.
+   Even in this simple case, it does not work with multibyte strings if the
+   locale encoding is GB18030 and one of the characters to be searched is a
+   digit.  */
+# undef strcspn
+/* Assume strcspn is always declared.  */
+_GL_WARN_ON_USE (strcspn, "strcspn cannot work correctly on character strings "
+                 "in multibyte locales - "
+                 "use mbscspn if you care about internationalization");
+#endif
+
+/* Find the first occurrence in S of any character in ACCEPT.  */
+#if @GNULIB_STRPBRK@
+# if ! @HAVE_STRPBRK@
+_GL_FUNCDECL_SYS (strpbrk, char *, (char const *__s, char const *__accept)
+                                   _GL_ATTRIBUTE_PURE
+                                   _GL_ARG_NONNULL ((1, 2)));
+# endif
+  /* On some systems, this function is defined as an overloaded function:
+       extern "C" { const char * strpbrk (const char *, const char *); }
+       extern "C++" { char * strpbrk (char *, const char *); }  */
+_GL_CXXALIAS_SYS_CAST2 (strpbrk,
+                        char *, (char const *__s, char const *__accept),
+                        const char *, (char const *__s, char const *__accept));
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+     && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (strpbrk, char *, (char *__s, char const *__accept));
+_GL_CXXALIASWARN1 (strpbrk, char const *,
+                   (char const *__s, char const *__accept));
+# elif __GLIBC__ >= 2
+_GL_CXXALIASWARN (strpbrk);
+# endif
+# if defined GNULIB_POSIXCHECK
+/* strpbrk() assumes the second argument is a list of single-byte characters.
+   Even in this simple case, it does not work with multibyte strings if the
+   locale encoding is GB18030 and one of the characters to be searched is a
+   digit.  */
+#  undef strpbrk
+_GL_WARN_ON_USE_CXX (strpbrk,
+                     const char *, char *, (const char *, const char *),
+                     "strpbrk cannot work correctly on character strings "
+                     "in multibyte locales - "
+                     "use mbspbrk if you care about internationalization");
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strpbrk
+# if HAVE_RAW_DECL_STRPBRK
+_GL_WARN_ON_USE_CXX (strpbrk,
+                     const char *, char *, (const char *, const char *),
+                     "strpbrk is unportable - "
+                     "use gnulib module strpbrk for portability");
+# endif
+#endif
+
+#if defined GNULIB_POSIXCHECK
+/* strspn() assumes the second argument is a list of single-byte characters.
+   Even in this simple case, it cannot work with multibyte strings.  */
+# undef strspn
+/* Assume strspn is always declared.  */
+_GL_WARN_ON_USE (strspn, "strspn cannot work correctly on character strings "
+                 "in multibyte locales - "
+                 "use mbsspn if you care about internationalization");
+#endif
+
+#if defined GNULIB_POSIXCHECK
+/* strrchr() does not work with multibyte strings if the locale encoding is
+   GB18030 and the character to be searched is a digit.  */
+# undef strrchr
+/* Assume strrchr is always declared.  */
+_GL_WARN_ON_USE_CXX (strrchr,
+                     const char *, char *, (const char *, int),
+                     "strrchr cannot work correctly on character strings "
+                     "in some multibyte locales - "
+                     "use mbsrchr if you care about internationalization");
+#endif
+
+/* Search the next delimiter (char listed in DELIM) starting at *STRINGP.
+   If one is found, overwrite it with a NUL, and advance *STRINGP
+   to point to the next char after it.  Otherwise, set *STRINGP to NULL.
+   If *STRINGP was already NULL, nothing happens.
+   Return the old value of *STRINGP.
+
+   This is a variant of strtok() that is multithread-safe and supports
+   empty fields.
+
+   Caveat: It modifies the original string.
+   Caveat: These functions cannot be used on constant strings.
+   Caveat: The identity of the delimiting character is lost.
+   Caveat: It doesn't work with multibyte strings unless all of the delimiter
+           characters are ASCII characters < 0x30.
+
+   See also strtok_r().  */
+#if @GNULIB_STRSEP@
+# if ! @HAVE_STRSEP@
+_GL_FUNCDECL_SYS (strsep, char *,
+                  (char **restrict __stringp, char const *restrict __delim)
+                  _GL_ARG_NONNULL ((1, 2)));
+# endif
+_GL_CXXALIAS_SYS (strsep, char *,
+                  (char **restrict __stringp, char const *restrict __delim));
+_GL_CXXALIASWARN (strsep);
+# if defined GNULIB_POSIXCHECK
+#  undef strsep
+_GL_WARN_ON_USE (strsep, "strsep cannot work correctly on character strings "
+                 "in multibyte locales - "
+                 "use mbssep if you care about internationalization");
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strsep
+# if HAVE_RAW_DECL_STRSEP
+_GL_WARN_ON_USE (strsep, "strsep is unportable - "
+                 "use gnulib module strsep for portability");
+# endif
+#endif
+
+#if @GNULIB_STRSTR@
+# if @REPLACE_STRSTR@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define strstr rpl_strstr
+#  endif
+_GL_FUNCDECL_RPL (strstr, char *, (const char *haystack, const char *needle)
+                                  _GL_ATTRIBUTE_PURE
+                                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (strstr, char *, (const char *haystack, const char *needle));
+# else
+  /* On some systems, this function is defined as an overloaded function:
+       extern "C++" { const char * strstr (const char *, const char *); }
+       extern "C++" { char * strstr (char *, const char *); }  */
+_GL_CXXALIAS_SYS_CAST2 (strstr,
+                        char *, (const char *haystack, const char *needle),
+                        const char *, (const char *haystack, const char *needle));
+# endif
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+     && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (strstr, char *, (char *haystack, const char *needle));
+_GL_CXXALIASWARN1 (strstr, const char *,
+                   (const char *haystack, const char *needle));
+# elif __GLIBC__ >= 2
+_GL_CXXALIASWARN (strstr);
+# endif
+#elif defined GNULIB_POSIXCHECK
+/* strstr() does not work with multibyte strings if the locale encoding is
+   different from UTF-8:
+   POSIX says that it operates on "strings", and "string" in POSIX is defined
+   as a sequence of bytes, not of characters.  */
+# undef strstr
+/* Assume strstr is always declared.  */
+_GL_WARN_ON_USE (strstr, "strstr is quadratic on many systems, and cannot "
+                 "work correctly on character strings in most "
+                 "multibyte locales - "
+                 "use mbsstr if you care about internationalization, "
+                 "or use strstr if you care about speed");
+#endif
+
+/* Find the first occurrence of NEEDLE in HAYSTACK, using case-insensitive
+   comparison.  */
+#if @GNULIB_STRCASESTR@
+# if @REPLACE_STRCASESTR@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define strcasestr rpl_strcasestr
+#  endif
+_GL_FUNCDECL_RPL (strcasestr, char *,
+                  (const char *haystack, const char *needle)
+                  _GL_ATTRIBUTE_PURE
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (strcasestr, char *,
+                  (const char *haystack, const char *needle));
+# else
+#  if ! @HAVE_STRCASESTR@
+_GL_FUNCDECL_SYS (strcasestr, char *,
+                  (const char *haystack, const char *needle)
+                  _GL_ATTRIBUTE_PURE
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+  /* On some systems, this function is defined as an overloaded function:
+       extern "C++" { const char * strcasestr (const char *, const char *); }
+       extern "C++" { char * strcasestr (char *, const char *); }  */
+_GL_CXXALIAS_SYS_CAST2 (strcasestr,
+                        char *, (const char *haystack, const char *needle),
+                        const char *, (const char *haystack, const char *needle));
+# endif
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+     && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (strcasestr, char *, (char *haystack, const char *needle));
+_GL_CXXALIASWARN1 (strcasestr, const char *,
+                   (const char *haystack, const char *needle));
+# else
+_GL_CXXALIASWARN (strcasestr);
+# endif
+#elif defined GNULIB_POSIXCHECK
+/* strcasestr() does not work with multibyte strings:
+   It is a glibc extension, and glibc implements it only for unibyte
+   locales.  */
+# undef strcasestr
+# if HAVE_RAW_DECL_STRCASESTR
+_GL_WARN_ON_USE (strcasestr, "strcasestr does work correctly on character "
+                 "strings in multibyte locales - "
+                 "use mbscasestr if you care about "
+                 "internationalization, or use c-strcasestr if you want "
+                 "a locale independent function");
+# endif
+#endif
+
+/* Parse S into tokens separated by characters in DELIM.
+   If S is NULL, the saved pointer in SAVE_PTR is used as
+   the next starting point.  For example:
+        char s[] = "-abc-=-def";
+        char *sp;
+        x = strtok_r(s, "-", &sp);      // x = "abc", sp = "=-def"
+        x = strtok_r(NULL, "-=", &sp);  // x = "def", sp = NULL
+        x = strtok_r(NULL, "=", &sp);   // x = NULL
+                // s = "abc\0-def\0"
+
+   This is a variant of strtok() that is multithread-safe.
+
+   For the POSIX documentation for this function, see:
+   https://pubs.opengroup.org/onlinepubs/9699919799/functions/strtok.html
+
+   Caveat: It modifies the original string.
+   Caveat: These functions cannot be used on constant strings.
+   Caveat: The identity of the delimiting character is lost.
+   Caveat: It doesn't work with multibyte strings unless all of the delimiter
+           characters are ASCII characters < 0x30.
+
+   See also strsep().  */
+#if @GNULIB_STRTOK_R@
+# if @REPLACE_STRTOK_R@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef strtok_r
+#   define strtok_r rpl_strtok_r
+#  endif
+_GL_FUNCDECL_RPL (strtok_r, char *,
+                  (char *restrict s, char const *restrict delim,
+                   char **restrict save_ptr)
+                  _GL_ARG_NONNULL ((2, 3)));
+_GL_CXXALIAS_RPL (strtok_r, char *,
+                  (char *restrict s, char const *restrict delim,
+                   char **restrict save_ptr));
+# else
+#  if @UNDEFINE_STRTOK_R@ || defined GNULIB_POSIXCHECK
+#   undef strtok_r
+#  endif
+#  if ! @HAVE_DECL_STRTOK_R@
+_GL_FUNCDECL_SYS (strtok_r, char *,
+                  (char *restrict s, char const *restrict delim,
+                   char **restrict save_ptr)
+                  _GL_ARG_NONNULL ((2, 3)));
+#  endif
+_GL_CXXALIAS_SYS (strtok_r, char *,
+                  (char *restrict s, char const *restrict delim,
+                   char **restrict save_ptr));
+# endif
+_GL_CXXALIASWARN (strtok_r);
+# if defined GNULIB_POSIXCHECK
+_GL_WARN_ON_USE (strtok_r, "strtok_r cannot work correctly on character "
+                 "strings in multibyte locales - "
+                 "use mbstok_r if you care about internationalization");
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strtok_r
+# if HAVE_RAW_DECL_STRTOK_R
+_GL_WARN_ON_USE (strtok_r, "strtok_r is unportable - "
+                 "use gnulib module strtok_r for portability");
+# endif
+#endif
+
+
+/* The following functions are not specified by POSIX.  They are gnulib
+   extensions.  */
+
+#if @GNULIB_MBSLEN@
+/* Return the number of multibyte characters in the character string STRING.
+   This considers multibyte characters, unlike strlen, which counts bytes.  */
+# ifdef __MirBSD__  /* MirBSD defines mbslen as a macro.  Override it.  */
+#  undef mbslen
+# endif
+# if @HAVE_MBSLEN@  /* AIX, OSF/1, MirBSD define mbslen already in libc.  */
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define mbslen rpl_mbslen
+#  endif
+_GL_FUNCDECL_RPL (mbslen, size_t, (const char *string)
+                                  _GL_ATTRIBUTE_PURE
+                                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (mbslen, size_t, (const char *string));
+# else
+_GL_FUNCDECL_SYS (mbslen, size_t, (const char *string)
+                                  _GL_ATTRIBUTE_PURE
+                                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_SYS (mbslen, size_t, (const char *string));
+# endif
+_GL_CXXALIASWARN (mbslen);
+#endif
+
+#if @GNULIB_MBSNLEN@
+/* Return the number of multibyte characters in the character string starting
+   at STRING and ending at STRING + LEN.  */
+_GL_EXTERN_C size_t mbsnlen (const char *string, size_t len)
+     _GL_ATTRIBUTE_PURE
+     _GL_ARG_NONNULL ((1));
+#endif
+
+#if @GNULIB_MBSCHR@
+/* Locate the first single-byte character C in the character string STRING,
+   and return a pointer to it.  Return NULL if C is not found in STRING.
+   Unlike strchr(), this function works correctly in multibyte locales with
+   encodings such as GB18030.  */
+# if defined __hpux
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define mbschr rpl_mbschr /* avoid collision with HP-UX function */
+#  endif
+_GL_FUNCDECL_RPL (mbschr, char *, (const char *string, int c)
+                                  _GL_ATTRIBUTE_PURE
+                                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (mbschr, char *, (const char *string, int c));
+# else
+_GL_FUNCDECL_SYS (mbschr, char *, (const char *string, int c)
+                                  _GL_ATTRIBUTE_PURE
+                                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_SYS (mbschr, char *, (const char *string, int c));
+# endif
+_GL_CXXALIASWARN (mbschr);
+#endif
+
+#if @GNULIB_MBSRCHR@
+/* Locate the last single-byte character C in the character string STRING,
+   and return a pointer to it.  Return NULL if C is not found in STRING.
+   Unlike strrchr(), this function works correctly in multibyte locales with
+   encodings such as GB18030.  */
+# if defined __hpux || defined __INTERIX
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define mbsrchr rpl_mbsrchr /* avoid collision with system function */
+#  endif
+_GL_FUNCDECL_RPL (mbsrchr, char *, (const char *string, int c)
+                                   _GL_ATTRIBUTE_PURE
+                                   _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (mbsrchr, char *, (const char *string, int c));
+# else
+_GL_FUNCDECL_SYS (mbsrchr, char *, (const char *string, int c)
+                                   _GL_ATTRIBUTE_PURE
+                                   _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_SYS (mbsrchr, char *, (const char *string, int c));
+# endif
+_GL_CXXALIASWARN (mbsrchr);
+#endif
+
+#if @GNULIB_MBSSTR@
+/* Find the first occurrence of the character string NEEDLE in the character
+   string HAYSTACK.  Return NULL if NEEDLE is not found in HAYSTACK.
+   Unlike strstr(), this function works correctly in multibyte locales with
+   encodings different from UTF-8.  */
+_GL_EXTERN_C char * mbsstr (const char *haystack, const char *needle)
+     _GL_ATTRIBUTE_PURE
+     _GL_ARG_NONNULL ((1, 2));
+#endif
+
+#if @GNULIB_MBSCASECMP@
+/* Compare the character strings S1 and S2, ignoring case, returning less than,
+   equal to or greater than zero if S1 is lexicographically less than, equal to
+   or greater than S2.
+   Note: This function may, in multibyte locales, return 0 for strings of
+   different lengths!
+   Unlike strcasecmp(), this function works correctly in multibyte locales.  */
+_GL_EXTERN_C int mbscasecmp (const char *s1, const char *s2)
+     _GL_ATTRIBUTE_PURE
+     _GL_ARG_NONNULL ((1, 2));
+#endif
+
+#if @GNULIB_MBSNCASECMP@
+/* Compare the initial segment of the character string S1 consisting of at most
+   N characters with the initial segment of the character string S2 consisting
+   of at most N characters, ignoring case, returning less than, equal to or
+   greater than zero if the initial segment of S1 is lexicographically less
+   than, equal to or greater than the initial segment of S2.
+   Note: This function may, in multibyte locales, return 0 for initial segments
+   of different lengths!
+   Unlike strncasecmp(), this function works correctly in multibyte locales.
+   But beware that N is not a byte count but a character count!  */
+_GL_EXTERN_C int mbsncasecmp (const char *s1, const char *s2, size_t n)
+     _GL_ATTRIBUTE_PURE
+     _GL_ARG_NONNULL ((1, 2));
+#endif
+
+#if @GNULIB_MBSPCASECMP@
+/* Compare the initial segment of the character string STRING consisting of
+   at most mbslen (PREFIX) characters with the character string PREFIX,
+   ignoring case.  If the two match, return a pointer to the first byte
+   after this prefix in STRING.  Otherwise, return NULL.
+   Note: This function may, in multibyte locales, return non-NULL if STRING
+   is of smaller length than PREFIX!
+   Unlike strncasecmp(), this function works correctly in multibyte
+   locales.  */
+_GL_EXTERN_C char * mbspcasecmp (const char *string, const char *prefix)
+     _GL_ATTRIBUTE_PURE
+     _GL_ARG_NONNULL ((1, 2));
+#endif
+
+#if @GNULIB_MBSCASESTR@
+/* Find the first occurrence of the character string NEEDLE in the character
+   string HAYSTACK, using case-insensitive comparison.
+   Note: This function may, in multibyte locales, return success even if
+   strlen (haystack) < strlen (needle) !
+   Unlike strcasestr(), this function works correctly in multibyte locales.  */
+_GL_EXTERN_C char * mbscasestr (const char *haystack, const char *needle)
+     _GL_ATTRIBUTE_PURE
+     _GL_ARG_NONNULL ((1, 2));
+#endif
+
+#if @GNULIB_MBSCSPN@
+/* Find the first occurrence in the character string STRING of any character
+   in the character string ACCEPT.  Return the number of bytes from the
+   beginning of the string to this occurrence, or to the end of the string
+   if none exists.
+   Unlike strcspn(), this function works correctly in multibyte locales.  */
+_GL_EXTERN_C size_t mbscspn (const char *string, const char *accept)
+     _GL_ATTRIBUTE_PURE
+     _GL_ARG_NONNULL ((1, 2));
+#endif
+
+#if @GNULIB_MBSPBRK@
+/* Find the first occurrence in the character string STRING of any character
+   in the character string ACCEPT.  Return the pointer to it, or NULL if none
+   exists.
+   Unlike strpbrk(), this function works correctly in multibyte locales.  */
+# if defined __hpux
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define mbspbrk rpl_mbspbrk /* avoid collision with HP-UX function */
+#  endif
+_GL_FUNCDECL_RPL (mbspbrk, char *, (const char *string, const char *accept)
+                                   _GL_ATTRIBUTE_PURE
+                                   _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (mbspbrk, char *, (const char *string, const char *accept));
+# else
+_GL_FUNCDECL_SYS (mbspbrk, char *, (const char *string, const char *accept)
+                                   _GL_ATTRIBUTE_PURE
+                                   _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_SYS (mbspbrk, char *, (const char *string, const char *accept));
+# endif
+_GL_CXXALIASWARN (mbspbrk);
+#endif
+
+#if @GNULIB_MBSSPN@
+/* Find the first occurrence in the character string STRING of any character
+   not in the character string REJECT.  Return the number of bytes from the
+   beginning of the string to this occurrence, or to the end of the string
+   if none exists.
+   Unlike strspn(), this function works correctly in multibyte locales.  */
+_GL_EXTERN_C size_t mbsspn (const char *string, const char *reject)
+     _GL_ATTRIBUTE_PURE
+     _GL_ARG_NONNULL ((1, 2));
+#endif
+
+#if @GNULIB_MBSSEP@
+/* Search the next delimiter (multibyte character listed in the character
+   string DELIM) starting at the character string *STRINGP.
+   If one is found, overwrite it with a NUL, and advance *STRINGP to point
+   to the next multibyte character after it.  Otherwise, set *STRINGP to NULL.
+   If *STRINGP was already NULL, nothing happens.
+   Return the old value of *STRINGP.
+
+   This is a variant of mbstok_r() that supports empty fields.
+
+   Caveat: It modifies the original string.
+   Caveat: These functions cannot be used on constant strings.
+   Caveat: The identity of the delimiting character is lost.
+
+   See also mbstok_r().  */
+_GL_EXTERN_C char * mbssep (char **stringp, const char *delim)
+     _GL_ARG_NONNULL ((1, 2));
+#endif
+
+#if @GNULIB_MBSTOK_R@
+/* Parse the character string STRING into tokens separated by characters in
+   the character string DELIM.
+   If STRING is NULL, the saved pointer in SAVE_PTR is used as
+   the next starting point.  For example:
+        char s[] = "-abc-=-def";
+        char *sp;
+        x = mbstok_r(s, "-", &sp);      // x = "abc", sp = "=-def"
+        x = mbstok_r(NULL, "-=", &sp);  // x = "def", sp = NULL
+        x = mbstok_r(NULL, "=", &sp);   // x = NULL
+                // s = "abc\0-def\0"
+
+   Caveat: It modifies the original string.
+   Caveat: These functions cannot be used on constant strings.
+   Caveat: The identity of the delimiting character is lost.
+
+   See also mbssep().  */
+_GL_EXTERN_C char * mbstok_r (char *restrict string, const char *delim,
+                              char **save_ptr)
+     _GL_ARG_NONNULL ((2, 3));
+#endif
+
+/* Map any int, typically from errno, into an error message.  */
+#if @GNULIB_STRERROR@
+# if @REPLACE_STRERROR@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef strerror
+#   define strerror rpl_strerror
+#  endif
+_GL_FUNCDECL_RPL (strerror, char *, (int));
+_GL_CXXALIAS_RPL (strerror, char *, (int));
+# else
+_GL_CXXALIAS_SYS (strerror, char *, (int));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (strerror);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strerror
+/* Assume strerror is always declared.  */
+_GL_WARN_ON_USE (strerror, "strerror is unportable - "
+                 "use gnulib module strerror to guarantee non-NULL result");
+#endif
+
+/* Map any int, typically from errno, into an error message.  Multithread-safe.
+   Uses the POSIX declaration, not the glibc declaration.  */
+#if @GNULIB_STRERROR_R@
+# if @REPLACE_STRERROR_R@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef strerror_r
+#   define strerror_r rpl_strerror_r
+#  endif
+_GL_FUNCDECL_RPL (strerror_r, int, (int errnum, char *buf, size_t buflen)
+                                   _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (strerror_r, int, (int errnum, char *buf, size_t buflen));
+# else
+#  if !@HAVE_DECL_STRERROR_R@
+_GL_FUNCDECL_SYS (strerror_r, int, (int errnum, char *buf, size_t buflen)
+                                   _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (strerror_r, int, (int errnum, char *buf, size_t buflen));
+# endif
+# if @HAVE_DECL_STRERROR_R@
+_GL_CXXALIASWARN (strerror_r);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strerror_r
+# if HAVE_RAW_DECL_STRERROR_R
+_GL_WARN_ON_USE (strerror_r, "strerror_r is unportable - "
+                 "use gnulib module strerror_r-posix for portability");
+# endif
+#endif
+
+/* Return the name of the system error code ERRNUM.  */
+#if @GNULIB_STRERRORNAME_NP@
+# if @REPLACE_STRERRORNAME_NP@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef strerrorname_np
+#   define strerrorname_np rpl_strerrorname_np
+#  endif
+_GL_FUNCDECL_RPL (strerrorname_np, const char *, (int errnum));
+_GL_CXXALIAS_RPL (strerrorname_np, const char *, (int errnum));
+# else
+#  if !@HAVE_STRERRORNAME_NP@
+_GL_FUNCDECL_SYS (strerrorname_np, const char *, (int errnum));
+#  endif
+_GL_CXXALIAS_SYS (strerrorname_np, const char *, (int errnum));
+# endif
+_GL_CXXALIASWARN (strerrorname_np);
+#elif defined GNULIB_POSIXCHECK
+# undef strerrorname_np
+# if HAVE_RAW_DECL_STRERRORNAME_NP
+_GL_WARN_ON_USE (strerrorname_np, "strerrorname_np is unportable - "
+                 "use gnulib module strerrorname_np for portability");
+# endif
+#endif
+
+/* Return an abbreviation string for the signal number SIG.  */
+#if @GNULIB_SIGABBREV_NP@
+# if ! @HAVE_SIGABBREV_NP@
+_GL_FUNCDECL_SYS (sigabbrev_np, const char *, (int sig));
+# endif
+_GL_CXXALIAS_SYS (sigabbrev_np, const char *, (int sig));
+_GL_CXXALIASWARN (sigabbrev_np);
+#elif defined GNULIB_POSIXCHECK
+# undef sigabbrev_np
+# if HAVE_RAW_DECL_SIGABBREV_NP
+_GL_WARN_ON_USE (sigabbrev_np, "sigabbrev_np is unportable - "
+                 "use gnulib module sigabbrev_np for portability");
+# endif
+#endif
+
+/* Return an English description string for the signal number SIG.  */
+#if @GNULIB_SIGDESCR_NP@
+# if ! @HAVE_SIGDESCR_NP@
+_GL_FUNCDECL_SYS (sigdescr_np, const char *, (int sig));
+# endif
+_GL_CXXALIAS_SYS (sigdescr_np, const char *, (int sig));
+_GL_CXXALIASWARN (sigdescr_np);
+#elif defined GNULIB_POSIXCHECK
+# undef sigdescr_np
+# if HAVE_RAW_DECL_SIGDESCR_NP
+_GL_WARN_ON_USE (sigdescr_np, "sigdescr_np is unportable - "
+                 "use gnulib module sigdescr_np for portability");
+# endif
+#endif
+
+#if @GNULIB_STRSIGNAL@
+# if @REPLACE_STRSIGNAL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define strsignal rpl_strsignal
+#  endif
+_GL_FUNCDECL_RPL (strsignal, char *, (int __sig));
+_GL_CXXALIAS_RPL (strsignal, char *, (int __sig));
+# else
+#  if ! @HAVE_DECL_STRSIGNAL@
+_GL_FUNCDECL_SYS (strsignal, char *, (int __sig));
+#  endif
+/* Need to cast, because on Cygwin 1.5.x systems, the return type is
+   'const char *'.  */
+_GL_CXXALIAS_SYS_CAST (strsignal, char *, (int __sig));
+# endif
+_GL_CXXALIASWARN (strsignal);
+#elif defined GNULIB_POSIXCHECK
+# undef strsignal
+# if HAVE_RAW_DECL_STRSIGNAL
+_GL_WARN_ON_USE (strsignal, "strsignal is unportable - "
+                 "use gnulib module strsignal for portability");
+# endif
+#endif
+
+#if @GNULIB_STRVERSCMP@
+# if !@HAVE_STRVERSCMP@
+_GL_FUNCDECL_SYS (strverscmp, int, (const char *, const char *)
+                                   _GL_ATTRIBUTE_PURE
+                                   _GL_ARG_NONNULL ((1, 2)));
+# endif
+_GL_CXXALIAS_SYS (strverscmp, int, (const char *, const char *));
+_GL_CXXALIASWARN (strverscmp);
+#elif defined GNULIB_POSIXCHECK
+# undef strverscmp
+# if HAVE_RAW_DECL_STRVERSCMP
+_GL_WARN_ON_USE (strverscmp, "strverscmp is unportable - "
+                 "use gnulib module strverscmp for portability");
+# endif
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_STRING_H */
+#endif /* _@GUARD_PREFIX@_STRING_H */
+#endif
diff --git a/src/grep/lib/stripslash.c b/src/grep/lib/stripslash.c
new file mode 100644
index 0000000..99bfbe6
--- /dev/null
+++ b/src/grep/lib/stripslash.c
@@ -0,0 +1,45 @@
+/* stripslash.c -- remove redundant trailing slashes from a file name
+
+   Copyright (C) 1990, 2001, 2003-2006, 2009-2021 Free Software Foundation,
+   Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "dirname.h"
+
+/* Remove trailing slashes from FILE.  Return true if a trailing slash
+   was removed.  This is useful when using file name completion from a
+   shell that adds a "/" after directory names (such as tcsh and
+   bash), because on symlinks to directories, several system calls
+   have different semantics according to whether a trailing slash is
+   present.  */
+
+bool
+strip_trailing_slashes (char *file)
+{
+  char *base = last_component (file);
+  char *base_lim;
+  bool had_slash;
+
+  /* last_component returns "" for file system roots, but we need to turn
+     "///" into "/".  */
+  if (! *base)
+    base = file;
+  base_lim = base + base_len (base);
+  had_slash = (*base_lim != '\0');
+  *base_lim = '\0';
+  return had_slash;
+}
diff --git a/src/grep/lib/strnlen.c b/src/grep/lib/strnlen.c
new file mode 100644
index 0000000..ded06ce
--- /dev/null
+++ b/src/grep/lib/strnlen.c
@@ -0,0 +1,30 @@
+/* Find the length of STRING, but scan at most MAXLEN characters.
+   Copyright (C) 2005-2007, 2009-2021 Free Software Foundation, Inc.
+   Written by Simon Josefsson.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <string.h>
+
+/* Find the length of STRING, but scan at most MAXLEN characters.
+   If no '\0' terminator is found in that many characters, return MAXLEN.  */
+
+size_t
+strnlen (const char *string, size_t maxlen)
+{
+  const char *end = memchr (string, '\0', maxlen);
+  return end ? (size_t) (end - string) : maxlen;
+}
diff --git a/src/grep/lib/strnlen1.c b/src/grep/lib/strnlen1.c
new file mode 100644
index 0000000..ac12576
--- /dev/null
+++ b/src/grep/lib/strnlen1.c
@@ -0,0 +1,35 @@
+/* Find the length of STRING + 1, but scan at most MAXLEN bytes.
+   Copyright (C) 2005-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "strnlen1.h"
+
+#include <string.h>
+
+/* Find the length of STRING + 1, but scan at most MAXLEN bytes.
+   If no '\0' terminator is found in that many characters, return MAXLEN.  */
+/* This is the same as strnlen (string, maxlen - 1) + 1.  */
+size_t
+strnlen1 (const char *string, size_t maxlen)
+{
+  const char *end = (const char *) memchr (string, '\0', maxlen);
+  if (end != NULL)
+    return end - string + 1;
+  else
+    return maxlen;
+}
diff --git a/src/grep/lib/strnlen1.h b/src/grep/lib/strnlen1.h
new file mode 100644
index 0000000..2d69299
--- /dev/null
+++ b/src/grep/lib/strnlen1.h
@@ -0,0 +1,40 @@
+/* Find the length of STRING + 1, but scan at most MAXLEN bytes.
+   Copyright (C) 2005, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _STRNLEN1_H
+#define _STRNLEN1_H
+
+#include <stddef.h>
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Find the length of STRING + 1, but scan at most MAXLEN bytes.
+   If no '\0' terminator is found in that many characters, return MAXLEN.  */
+/* This is the same as strnlen (string, maxlen - 1) + 1.  */
+extern size_t strnlen1 (const char *string, size_t maxlen)
+  _GL_ATTRIBUTE_PURE;
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* _STRNLEN1_H */
diff --git a/src/grep/lib/strstr.c b/src/grep/lib/strstr.c
new file mode 100644
index 0000000..2f62ce4
--- /dev/null
+++ b/src/grep/lib/strstr.c
@@ -0,0 +1,78 @@
+/* Copyright (C) 1991-1994, 1996-1998, 2000, 2004, 2007-2021 Free Software
+   Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* This particular implementation was written by Eric Blake, 2008.  */
+
+#ifndef _LIBC
+# include <config.h>
+#endif
+
+/* Specification of strstr.  */
+#include <string.h>
+
+#include <stdbool.h>
+
+#define RETURN_TYPE char *
+#define AVAILABLE(h, h_l, j, n_l)                       \
+  (!memchr ((h) + (h_l), '\0', (j) + (n_l) - (h_l))     \
+   && ((h_l) = (j) + (n_l)))
+#include "str-two-way.h"
+
+/* Return the first occurrence of NEEDLE in HAYSTACK.  Return HAYSTACK
+   if NEEDLE is empty, otherwise NULL if NEEDLE is not found in
+   HAYSTACK.  */
+char *
+strstr (const char *haystack_start, const char *needle_start)
+{
+  const char *haystack = haystack_start;
+  const char *needle = needle_start;
+  size_t needle_len; /* Length of NEEDLE.  */
+  size_t haystack_len; /* Known minimum length of HAYSTACK.  */
+  bool ok = true; /* True if NEEDLE is prefix of HAYSTACK.  */
+
+  /* Determine length of NEEDLE, and in the process, make sure
+     HAYSTACK is at least as long (no point processing all of a long
+     NEEDLE if HAYSTACK is too short).  */
+  while (*haystack && *needle)
+    ok &= *haystack++ == *needle++;
+  if (*needle)
+    return NULL;
+  if (ok)
+    return (char *) haystack_start;
+
+  /* Reduce the size of haystack using strchr, since it has a smaller
+     linear coefficient than the Two-Way algorithm.  */
+  needle_len = needle - needle_start;
+  haystack = strchr (haystack_start + 1, *needle_start);
+  if (!haystack || __builtin_expect (needle_len == 1, 0))
+    return (char *) haystack;
+  needle -= needle_len;
+  haystack_len = (haystack > haystack_start + needle_len ? 1
+                  : needle_len + haystack_start - haystack);
+
+  /* Perform the search.  Abstract memory is considered to be an array
+     of 'unsigned char' values, not an array of 'char' values.  See
+     ISO C 99 section 6.2.6.1.  */
+  if (needle_len < LONG_NEEDLE_THRESHOLD)
+    return two_way_short_needle ((const unsigned char *) haystack,
+                                 haystack_len,
+                                 (const unsigned char *) needle, needle_len);
+  return two_way_long_needle ((const unsigned char *) haystack, haystack_len,
+                              (const unsigned char *) needle, needle_len);
+}
+
+#undef LONG_NEEDLE_THRESHOLD
diff --git a/src/grep/lib/strtoimax.c b/src/grep/lib/strtoimax.c
new file mode 100644
index 0000000..bf8534a
--- /dev/null
+++ b/src/grep/lib/strtoimax.c
@@ -0,0 +1,72 @@
+/* Convert string representation of a number into an intmax_t value.
+
+   Copyright (C) 1999, 2001-2004, 2006, 2009-2021 Free Software Foundation,
+   Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert. */
+
+#include <config.h>
+
+/* Verify interface.  */
+#include <inttypes.h>
+
+#include <stdlib.h>
+
+#include "verify.h"
+
+#ifdef UNSIGNED
+# ifndef HAVE_DECL_STRTOULL
+"this configure-time declaration test was not run"
+# endif
+# if !HAVE_DECL_STRTOULL
+unsigned long long int strtoull (char const *, char **, int);
+# endif
+
+#else
+
+# ifndef HAVE_DECL_STRTOLL
+"this configure-time declaration test was not run"
+# endif
+# if !HAVE_DECL_STRTOLL
+long long int strtoll (char const *, char **, int);
+# endif
+#endif
+
+#ifdef UNSIGNED
+# define Int uintmax_t
+# define Strtoimax strtoumax
+# define Strtol strtoul
+# define Strtoll strtoull
+# define Unsigned unsigned
+#else
+# define Int intmax_t
+# define Strtoimax strtoimax
+# define Strtol strtol
+# define Strtoll strtoll
+# define Unsigned
+#endif
+
+Int
+Strtoimax (char const *ptr, char **endptr, int base)
+{
+  verify (sizeof (Int) == sizeof (Unsigned long int)
+          || sizeof (Int) == sizeof (Unsigned long long int));
+
+  if (sizeof (Int) != sizeof (Unsigned long int))
+    return Strtoll (ptr, endptr, base);
+
+  return Strtol (ptr, endptr, base);
+}
diff --git a/src/grep/lib/strtol.c b/src/grep/lib/strtol.c
new file mode 100644
index 0000000..c49321b
--- /dev/null
+++ b/src/grep/lib/strtol.c
@@ -0,0 +1,408 @@
+/* Convert string representation of a number into an integer value.
+
+   Copyright (C) 1991-1992, 1994-1999, 2003, 2005-2007, 2009-2021 Free Software
+   Foundation, Inc.
+
+   NOTE: The canonical source of this file is maintained with the GNU C
+   Library.  Bugs can be reported to bug-glibc@gnu.org.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifdef _LIBC
+# define USE_NUMBER_GROUPING
+#else
+# include <config.h>
+#endif
+
+#include <ctype.h>
+#include <errno.h>
+#ifndef __set_errno
+# define __set_errno(Val) errno = (Val)
+#endif
+
+#include <limits.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef USE_NUMBER_GROUPING
+# include "../locale/localeinfo.h"
+#endif
+
+/* Nonzero if we are defining 'strtoul' or 'strtoull', operating on
+   unsigned integers.  */
+#ifndef UNSIGNED
+# define UNSIGNED 0
+# define INT LONG int
+#else
+# define INT unsigned LONG int
+#endif
+
+/* Determine the name.  */
+#ifdef USE_IN_EXTENDED_LOCALE_MODEL
+# undef strtol
+# if UNSIGNED
+#  ifdef USE_WIDE_CHAR
+#   ifdef QUAD
+#    define strtol __wcstoull_l
+#   else
+#    define strtol __wcstoul_l
+#   endif
+#  else
+#   ifdef QUAD
+#    define strtol __strtoull_l
+#   else
+#    define strtol __strtoul_l
+#   endif
+#  endif
+# else
+#  ifdef USE_WIDE_CHAR
+#   ifdef QUAD
+#    define strtol __wcstoll_l
+#   else
+#    define strtol __wcstol_l
+#   endif
+#  else
+#   ifdef QUAD
+#    define strtol __strtoll_l
+#   else
+#    define strtol __strtol_l
+#   endif
+#  endif
+# endif
+#else
+# if UNSIGNED
+#  undef strtol
+#  ifdef USE_WIDE_CHAR
+#   ifdef QUAD
+#    define strtol wcstoull
+#   else
+#    define strtol wcstoul
+#   endif
+#  else
+#   ifdef QUAD
+#    define strtol strtoull
+#   else
+#    define strtol strtoul
+#   endif
+#  endif
+# else
+#  ifdef USE_WIDE_CHAR
+#   undef strtol
+#   ifdef QUAD
+#    define strtol wcstoll
+#   else
+#    define strtol wcstol
+#   endif
+#  else
+#   ifdef QUAD
+#    undef strtol
+#    define strtol strtoll
+#   endif
+#  endif
+# endif
+#endif
+
+/* If QUAD is defined, we are defining 'strtoll' or 'strtoull',
+   operating on 'long long int's.  */
+#ifdef QUAD
+# define LONG long long
+# define STRTOL_LONG_MIN LLONG_MIN
+# define STRTOL_LONG_MAX LLONG_MAX
+# define STRTOL_ULONG_MAX ULLONG_MAX
+# if __GNUC__ == 2 && __GNUC_MINOR__ < 7
+   /* Work around gcc bug with using this constant.  */
+   static const unsigned long long int maxquad = ULLONG_MAX;
+#  undef STRTOL_ULONG_MAX
+#  define STRTOL_ULONG_MAX maxquad
+# endif
+#else
+# define LONG long
+# define STRTOL_LONG_MIN LONG_MIN
+# define STRTOL_LONG_MAX LONG_MAX
+# define STRTOL_ULONG_MAX ULONG_MAX
+#endif
+
+
+#ifdef USE_NUMBER_GROUPING
+# define GROUP_PARAM_PROTO , int group
+#else
+# define GROUP_PARAM_PROTO
+#endif
+
+/* We use this code also for the extended locale handling where the
+   function gets as an additional argument the locale which has to be
+   used.  To access the values we have to redefine the _NL_CURRENT
+   macro.  */
+#ifdef USE_IN_EXTENDED_LOCALE_MODEL
+# undef _NL_CURRENT
+# define _NL_CURRENT(category, item) \
+  (current->values[_NL_ITEM_INDEX (item)].string)
+# define LOCALE_PARAM , loc
+# define LOCALE_PARAM_PROTO , __locale_t loc
+#else
+# define LOCALE_PARAM
+# define LOCALE_PARAM_PROTO
+#endif
+
+#ifdef USE_WIDE_CHAR
+# include <wchar.h>
+# include <wctype.h>
+# define L_(Ch) L##Ch
+# define UCHAR_TYPE wint_t
+# define STRING_TYPE wchar_t
+# ifdef USE_IN_EXTENDED_LOCALE_MODEL
+#  define ISSPACE(Ch) __iswspace_l ((Ch), loc)
+#  define ISALPHA(Ch) __iswalpha_l ((Ch), loc)
+#  define TOUPPER(Ch) __towupper_l ((Ch), loc)
+# else
+#  define ISSPACE(Ch) iswspace (Ch)
+#  define ISALPHA(Ch) iswalpha (Ch)
+#  define TOUPPER(Ch) towupper (Ch)
+# endif
+#else
+# define L_(Ch) Ch
+# define UCHAR_TYPE unsigned char
+# define STRING_TYPE char
+# ifdef USE_IN_EXTENDED_LOCALE_MODEL
+#  define ISSPACE(Ch) __isspace_l ((unsigned char) (Ch), loc)
+#  define ISALPHA(Ch) __isalpha_l ((unsigned char) (Ch), loc)
+#  define TOUPPER(Ch) __toupper_l ((unsigned char) (Ch), loc)
+# else
+#  define ISSPACE(Ch) isspace ((unsigned char) (Ch))
+#  define ISALPHA(Ch) isalpha ((unsigned char) (Ch))
+#  define TOUPPER(Ch) toupper ((unsigned char) (Ch))
+# endif
+#endif
+
+#ifdef USE_NUMBER_GROUPING
+# define INTERNAL(X) INTERNAL1(X)
+# define INTERNAL1(X) __##X##_internal
+# define WEAKNAME(X) WEAKNAME1(X)
+#else
+# define INTERNAL(X) X
+#endif
+
+#ifdef USE_NUMBER_GROUPING
+/* This file defines a function to check for correct grouping.  */
+# include "grouping.h"
+#endif
+
+
+
+/* Convert NPTR to an 'unsigned long int' or 'long int' in base BASE.
+   If BASE is 0 the base is determined by the presence of a leading
+   zero, indicating octal or a leading "0x" or "0X", indicating hexadecimal.
+   If BASE is < 2 or > 36, it is reset to 10.
+   If ENDPTR is not NULL, a pointer to the character after the last
+   one converted is stored in *ENDPTR.  */
+
+INT
+INTERNAL (strtol) (const STRING_TYPE *nptr, STRING_TYPE **endptr,
+                   int base GROUP_PARAM_PROTO LOCALE_PARAM_PROTO)
+{
+  int negative;
+  register unsigned LONG int cutoff;
+  register unsigned int cutlim;
+  register unsigned LONG int i;
+  register const STRING_TYPE *s;
+  register UCHAR_TYPE c;
+  const STRING_TYPE *save, *end;
+  int overflow;
+
+#ifdef USE_NUMBER_GROUPING
+# ifdef USE_IN_EXTENDED_LOCALE_MODEL
+  struct locale_data *current = loc->__locales[LC_NUMERIC];
+# endif
+  /* The thousands character of the current locale.  */
+  wchar_t thousands = L'\0';
+  /* The numeric grouping specification of the current locale,
+     in the format described in <locale.h>.  */
+  const char *grouping;
+
+  if (group)
+    {
+      grouping = _NL_CURRENT (LC_NUMERIC, GROUPING);
+      if (*grouping <= 0 || *grouping == CHAR_MAX)
+        grouping = NULL;
+      else
+        {
+          /* Figure out the thousands separator character.  */
+# if defined _LIBC || defined _HAVE_BTOWC
+          thousands = __btowc (*_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP));
+          if (thousands == WEOF)
+            thousands = L'\0';
+# endif
+          if (thousands == L'\0')
+            grouping = NULL;
+        }
+    }
+  else
+    grouping = NULL;
+#endif
+
+  if (base < 0 || base == 1 || base > 36)
+    {
+      __set_errno (EINVAL);
+      return 0;
+    }
+
+  save = s = nptr;
+
+  /* Skip white space.  */
+  while (ISSPACE (*s))
+    ++s;
+  if (*s == L_('\0'))
+    goto noconv;
+
+  /* Check for a sign.  */
+  if (*s == L_('-'))
+    {
+      negative = 1;
+      ++s;
+    }
+  else if (*s == L_('+'))
+    {
+      negative = 0;
+      ++s;
+    }
+  else
+    negative = 0;
+
+  /* Recognize number prefix and if BASE is zero, figure it out ourselves.  */
+  if (*s == L_('0'))
+    {
+      if ((base == 0 || base == 16) && TOUPPER (s[1]) == L_('X'))
+        {
+          s += 2;
+          base = 16;
+        }
+      else if (base == 0)
+        base = 8;
+    }
+  else if (base == 0)
+    base = 10;
+
+  /* Save the pointer so we can check later if anything happened.  */
+  save = s;
+
+#ifdef USE_NUMBER_GROUPING
+  if (group)
+    {
+      /* Find the end of the digit string and check its grouping.  */
+      end = s;
+      for (c = *end; c != L_('\0'); c = *++end)
+        if ((wchar_t) c != thousands
+            && ((wchar_t) c < L_('0') || (wchar_t) c > L_('9'))
+            && (!ISALPHA (c) || (int) (TOUPPER (c) - L_('A') + 10) >= base))
+          break;
+      if (*s == thousands)
+        end = s;
+      else
+        end = correctly_grouped_prefix (s, end, thousands, grouping);
+    }
+  else
+#endif
+    end = NULL;
+
+  cutoff = STRTOL_ULONG_MAX / (unsigned LONG int) base;
+  cutlim = STRTOL_ULONG_MAX % (unsigned LONG int) base;
+
+  overflow = 0;
+  i = 0;
+  for (c = *s; c != L_('\0'); c = *++s)
+    {
+      if (s == end)
+        break;
+      if (c >= L_('0') && c <= L_('9'))
+        c -= L_('0');
+      else if (ISALPHA (c))
+        c = TOUPPER (c) - L_('A') + 10;
+      else
+        break;
+      if ((int) c >= base)
+        break;
+      /* Check for overflow.  */
+      if (i > cutoff || (i == cutoff && c > cutlim))
+        overflow = 1;
+      else
+        {
+          i *= (unsigned LONG int) base;
+          i += c;
+        }
+    }
+
+  /* Check if anything actually happened.  */
+  if (s == save)
+    goto noconv;
+
+  /* Store in ENDPTR the address of one character
+     past the last character we converted.  */
+  if (endptr != NULL)
+    *endptr = (STRING_TYPE *) s;
+
+#if !UNSIGNED
+  /* Check for a value that is within the range of
+     'unsigned LONG int', but outside the range of 'LONG int'.  */
+  if (overflow == 0
+      && i > (negative
+              ? -((unsigned LONG int) (STRTOL_LONG_MIN + 1)) + 1
+              : (unsigned LONG int) STRTOL_LONG_MAX))
+    overflow = 1;
+#endif
+
+  if (overflow)
+    {
+      __set_errno (ERANGE);
+#if UNSIGNED
+      return STRTOL_ULONG_MAX;
+#else
+      return negative ? STRTOL_LONG_MIN : STRTOL_LONG_MAX;
+#endif
+    }
+
+  /* Return the result of the appropriate sign.  */
+  return negative ? -i : i;
+
+noconv:
+  /* We must handle a special case here: the base is 0 or 16 and the
+     first two characters are '0' and 'x', but the rest are no
+     hexadecimal digits.  This is no error case.  We return 0 and
+     ENDPTR points to the 'x'.  */
+  if (endptr != NULL)
+    {
+      if (save - nptr >= 2 && TOUPPER (save[-1]) == L_('X')
+          && save[-2] == L_('0'))
+        *endptr = (STRING_TYPE *) &save[-1];
+      else
+        /*  There was no number to convert.  */
+        *endptr = (STRING_TYPE *) nptr;
+    }
+
+  return 0L;
+}
+
+#ifdef USE_NUMBER_GROUPING
+/* External user entry point.  */
+
+INT
+# ifdef weak_function
+weak_function
+# endif
+strtol (const STRING_TYPE *nptr, STRING_TYPE **endptr,
+        int base LOCALE_PARAM_PROTO)
+{
+  return INTERNAL (strtol) (nptr, endptr, base, 0 LOCALE_PARAM);
+}
+#endif
diff --git a/src/grep/lib/strtoll.c b/src/grep/lib/strtoll.c
new file mode 100644
index 0000000..8e6f93f
--- /dev/null
+++ b/src/grep/lib/strtoll.c
@@ -0,0 +1,33 @@
+/* Function to parse a 'long long int' from text.
+   Copyright (C) 1995-1997, 1999, 2001, 2009-2021 Free Software Foundation,
+   Inc.
+   This file is part of the GNU C Library.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#define QUAD    1
+
+#include <strtol.c>
+
+#ifdef _LIBC
+# ifdef SHARED
+#  include <shlib-compat.h>
+
+#  if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
+compat_symbol (libc, __strtoll_internal, __strtoq_internal, GLIBC_2_0);
+#  endif
+
+# endif
+weak_alias (strtoll, strtoq)
+#endif
diff --git a/src/grep/lib/strtoul.c b/src/grep/lib/strtoul.c
new file mode 100644
index 0000000..3927f1a
--- /dev/null
+++ b/src/grep/lib/strtoul.c
@@ -0,0 +1,19 @@
+/* Copyright (C) 1991, 1997, 2009-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#define UNSIGNED        1
+
+#include "strtol.c"
diff --git a/src/grep/lib/strtoull.c b/src/grep/lib/strtoull.c
new file mode 100644
index 0000000..261e4e8
--- /dev/null
+++ b/src/grep/lib/strtoull.c
@@ -0,0 +1,26 @@
+/* Function to parse an 'unsigned long long int' from text.
+   Copyright (C) 1995-1997, 1999, 2009-2021 Free Software Foundation, Inc.
+   NOTE: The canonical source of this file is maintained with the GNU C
+   Library.  Bugs can be reported to bug-glibc@gnu.org.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#define QUAD 1
+
+#include "strtoul.c"
+
+#ifdef _LIBC
+strong_alias (__strtoull_internal, __strtouq_internal)
+weak_alias (strtoull, strtouq)
+#endif
diff --git a/src/grep/lib/strtoumax.c b/src/grep/lib/strtoumax.c
new file mode 100644
index 0000000..3b4d9ec
--- /dev/null
+++ b/src/grep/lib/strtoumax.c
@@ -0,0 +1,19 @@
+/* Convert string representation of a number into a uintmax_t value.
+
+   Copyright (C) 1999-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#define UNSIGNED 1
+#include "strtoimax.c"
diff --git a/src/grep/lib/sys-limits.h b/src/grep/lib/sys-limits.h
new file mode 100644
index 0000000..2d9784d
--- /dev/null
+++ b/src/grep/lib/sys-limits.h
@@ -0,0 +1,42 @@
+/* System call limits
+
+   Copyright 2018-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GL_SYS_LIMITS_H
+#define _GL_SYS_LIMITS_H
+
+#include <limits.h>
+
+/* Maximum number of bytes to read or write in a single system call.
+   This can be useful for system calls like sendfile on GNU/Linux,
+   which do not handle more than MAX_RW_COUNT bytes correctly.
+   The Linux kernel MAX_RW_COUNT is at least INT_MAX >> 20 << 20,
+   where the 20 comes from the Hexagon port with 1 MiB pages; use that
+   as an approximation, as the exact value may not be available to us.
+
+   Using this also works around a serious Linux bug before 2.6.16; see
+   <https://bugzilla.redhat.com/show_bug.cgi?id=612839>.
+
+   Using this also works around a Tru64 5.1 bug, where attempting
+   to read INT_MAX bytes fails with errno == EINVAL.  See
+   <https://lists.gnu.org/r/bug-gnu-utils/2002-04/msg00010.html>.
+
+   Using this is likely to work around similar bugs in other operating
+   systems.  */
+
+enum { SYS_BUFSIZE_MAX = INT_MAX >> 20 << 20 };
+
+#endif
diff --git a/src/grep/lib/sys_stat.in.h b/src/grep/lib/sys_stat.in.h
new file mode 100644
index 0000000..babe3db
--- /dev/null
+++ b/src/grep/lib/sys_stat.in.h
@@ -0,0 +1,928 @@
+/* Provide a more complete sys/stat.h header file.
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake, Paul Eggert, and Jim Meyering.  */
+
+/* This file is supposed to be used on platforms where <sys/stat.h> is
+   incomplete.  It is intended to provide definitions and prototypes
+   needed by an application.  Start with what the system provides.  */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if defined __need_system_sys_stat_h
+/* Special invocation convention.  */
+
+#@INCLUDE_NEXT@ @NEXT_SYS_STAT_H@
+
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_SYS_STAT_H
+
+/* Get nlink_t.
+   May also define off_t to a 64-bit type on native Windows.  */
+#include <sys/types.h>
+
+/* Get struct timespec.  */
+#include <time.h>
+
+/* The include_next requires a split double-inclusion guard.  */
+#@INCLUDE_NEXT@ @NEXT_SYS_STAT_H@
+
+#ifndef _@GUARD_PREFIX@_SYS_STAT_H
+#define _@GUARD_PREFIX@_SYS_STAT_H
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+/* Before doing "#define mknod rpl_mknod" below, we need to include all
+   headers that may declare mknod().  OS/2 kLIBC declares mknod() in
+   <unistd.h>, not in <sys/stat.h>.  */
+#ifdef __KLIBC__
+# include <unistd.h>
+#endif
+
+/* Before doing "#define mkdir rpl_mkdir" below, we need to include all
+   headers that may declare mkdir().  Native Windows platforms declare mkdir
+   in <io.h> and/or <direct.h>, not in <sys/stat.h>.  */
+#if defined _WIN32 && ! defined __CYGWIN__
+# include <io.h>     /* mingw32, mingw64 */
+# include <direct.h> /* mingw64, MSVC 9 */
+#endif
+
+/* Native Windows platforms declare umask() in <io.h>.  */
+#if 0 && (defined _WIN32 && ! defined __CYGWIN__)
+# include <io.h>
+#endif
+
+/* Large File Support on native Windows.  */
+#if @WINDOWS_64_BIT_ST_SIZE@
+# define stat _stati64
+#endif
+
+/* Optionally, override 'struct stat' on native Windows.  */
+#if @GNULIB_OVERRIDES_STRUCT_STAT@
+
+# undef stat
+# if @GNULIB_STAT@
+#  define stat rpl_stat
+# else
+   /* Provoke a clear link error if stat() is used as a function and
+      module 'stat' is not in use.  */
+#  define stat stat_used_without_requesting_gnulib_module_stat
+# endif
+
+# if !GNULIB_defined_struct_stat
+struct stat
+{
+  dev_t st_dev;
+  ino_t st_ino;
+  mode_t st_mode;
+  nlink_t st_nlink;
+#  if 0
+  uid_t st_uid;
+#  else /* uid_t is not defined by default on native Windows.  */
+  short st_uid;
+#  endif
+#  if 0
+  gid_t st_gid;
+#  else /* gid_t is not defined by default on native Windows.  */
+  short st_gid;
+#  endif
+  dev_t st_rdev;
+  off_t st_size;
+#  if 0
+  blksize_t st_blksize;
+  blkcnt_t st_blocks;
+#  endif
+
+#  if @WINDOWS_STAT_TIMESPEC@
+  struct timespec st_atim;
+  struct timespec st_mtim;
+  struct timespec st_ctim;
+#  else
+  time_t st_atime;
+  time_t st_mtime;
+  time_t st_ctime;
+#  endif
+};
+#  if @WINDOWS_STAT_TIMESPEC@
+#   define st_atime st_atim.tv_sec
+#   define st_mtime st_mtim.tv_sec
+#   define st_ctime st_ctim.tv_sec
+    /* Indicator, for gnulib internal purposes.  */
+#   define _GL_WINDOWS_STAT_TIMESPEC 1
+#  endif
+#  define GNULIB_defined_struct_stat 1
+# endif
+
+/* Other possible values of st_mode.  */
+# if 0
+#  define _S_IFBLK  0x6000
+# endif
+# if 0
+#  define _S_IFLNK  0xA000
+# endif
+# if 0
+#  define _S_IFSOCK 0xC000
+# endif
+
+#endif
+
+#ifndef S_IFIFO
+# ifdef _S_IFIFO
+#  define S_IFIFO _S_IFIFO
+# endif
+#endif
+
+#ifndef S_IFMT
+# define S_IFMT 0170000
+#endif
+
+#if STAT_MACROS_BROKEN
+# undef S_ISBLK
+# undef S_ISCHR
+# undef S_ISDIR
+# undef S_ISFIFO
+# undef S_ISLNK
+# undef S_ISNAM
+# undef S_ISMPB
+# undef S_ISMPC
+# undef S_ISNWK
+# undef S_ISREG
+# undef S_ISSOCK
+#endif
+
+#ifndef S_ISBLK
+# ifdef S_IFBLK
+#  define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
+# else
+#  define S_ISBLK(m) 0
+# endif
+#endif
+
+#ifndef S_ISCHR
+# ifdef S_IFCHR
+#  define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
+# else
+#  define S_ISCHR(m) 0
+# endif
+#endif
+
+#ifndef S_ISDIR
+# ifdef S_IFDIR
+#  define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
+# else
+#  define S_ISDIR(m) 0
+# endif
+#endif
+
+#ifndef S_ISDOOR /* Solaris 2.5 and up */
+# define S_ISDOOR(m) 0
+#endif
+
+#ifndef S_ISFIFO
+# ifdef S_IFIFO
+#  define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
+# else
+#  define S_ISFIFO(m) 0
+# endif
+#endif
+
+#ifndef S_ISLNK
+# ifdef S_IFLNK
+#  define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
+# else
+#  define S_ISLNK(m) 0
+# endif
+#endif
+
+#ifndef S_ISMPB /* V7 */
+# ifdef S_IFMPB
+#  define S_ISMPB(m) (((m) & S_IFMT) == S_IFMPB)
+#  define S_ISMPC(m) (((m) & S_IFMT) == S_IFMPC)
+# else
+#  define S_ISMPB(m) 0
+#  define S_ISMPC(m) 0
+# endif
+#endif
+
+#ifndef S_ISMPX /* AIX */
+# define S_ISMPX(m) 0
+#endif
+
+#ifndef S_ISNAM /* Xenix */
+# ifdef S_IFNAM
+#  define S_ISNAM(m) (((m) & S_IFMT) == S_IFNAM)
+# else
+#  define S_ISNAM(m) 0
+# endif
+#endif
+
+#ifndef S_ISNWK /* HP/UX */
+# ifdef S_IFNWK
+#  define S_ISNWK(m) (((m) & S_IFMT) == S_IFNWK)
+# else
+#  define S_ISNWK(m) 0
+# endif
+#endif
+
+#ifndef S_ISPORT /* Solaris 10 and up */
+# define S_ISPORT(m) 0
+#endif
+
+#ifndef S_ISREG
+# ifdef S_IFREG
+#  define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
+# else
+#  define S_ISREG(m) 0
+# endif
+#endif
+
+#ifndef S_ISSOCK
+# ifdef S_IFSOCK
+#  define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
+# else
+#  define S_ISSOCK(m) 0
+# endif
+#endif
+
+
+#ifndef S_TYPEISMQ
+# define S_TYPEISMQ(p) 0
+#endif
+
+#ifndef S_TYPEISTMO
+# define S_TYPEISTMO(p) 0
+#endif
+
+
+#ifndef S_TYPEISSEM
+# ifdef S_INSEM
+#  define S_TYPEISSEM(p) (S_ISNAM ((p)->st_mode) && (p)->st_rdev == S_INSEM)
+# else
+#  define S_TYPEISSEM(p) 0
+# endif
+#endif
+
+#ifndef S_TYPEISSHM
+# ifdef S_INSHD
+#  define S_TYPEISSHM(p) (S_ISNAM ((p)->st_mode) && (p)->st_rdev == S_INSHD)
+# else
+#  define S_TYPEISSHM(p) 0
+# endif
+#endif
+
+/* high performance ("contiguous data") */
+#ifndef S_ISCTG
+# define S_ISCTG(p) 0
+#endif
+
+/* Cray DMF (data migration facility): off line, with data  */
+#ifndef S_ISOFD
+# define S_ISOFD(p) 0
+#endif
+
+/* Cray DMF (data migration facility): off line, with no data  */
+#ifndef S_ISOFL
+# define S_ISOFL(p) 0
+#endif
+
+/* 4.4BSD whiteout */
+#ifndef S_ISWHT
+# define S_ISWHT(m) 0
+#endif
+
+/* If any of the following are undefined,
+   define them to their de facto standard values.  */
+#if !S_ISUID
+# define S_ISUID 04000
+#endif
+#if !S_ISGID
+# define S_ISGID 02000
+#endif
+
+/* S_ISVTX is a common extension to POSIX.  */
+#ifndef S_ISVTX
+# define S_ISVTX 01000
+#endif
+
+#if !S_IRUSR && S_IREAD
+# define S_IRUSR S_IREAD
+#endif
+#if !S_IRUSR
+# define S_IRUSR 00400
+#endif
+#if !S_IRGRP
+# define S_IRGRP (S_IRUSR >> 3)
+#endif
+#if !S_IROTH
+# define S_IROTH (S_IRUSR >> 6)
+#endif
+
+#if !S_IWUSR && S_IWRITE
+# define S_IWUSR S_IWRITE
+#endif
+#if !S_IWUSR
+# define S_IWUSR 00200
+#endif
+#if !S_IWGRP
+# define S_IWGRP (S_IWUSR >> 3)
+#endif
+#if !S_IWOTH
+# define S_IWOTH (S_IWUSR >> 6)
+#endif
+
+#if !S_IXUSR && S_IEXEC
+# define S_IXUSR S_IEXEC
+#endif
+#if !S_IXUSR
+# define S_IXUSR 00100
+#endif
+#if !S_IXGRP
+# define S_IXGRP (S_IXUSR >> 3)
+#endif
+#if !S_IXOTH
+# define S_IXOTH (S_IXUSR >> 6)
+#endif
+
+#if !S_IRWXU
+# define S_IRWXU (S_IRUSR | S_IWUSR | S_IXUSR)
+#endif
+#if !S_IRWXG
+# define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP)
+#endif
+#if !S_IRWXO
+# define S_IRWXO (S_IROTH | S_IWOTH | S_IXOTH)
+#endif
+
+/* Although S_IXUGO and S_IRWXUGO are not specified by POSIX and are
+   not implemented in GNU/Linux, some Gnulib-using apps use the macros.  */
+#if !S_IXUGO
+# define S_IXUGO (S_IXUSR | S_IXGRP | S_IXOTH)
+#endif
+#ifndef S_IRWXUGO
+# define S_IRWXUGO (S_IRWXU | S_IRWXG | S_IRWXO)
+#endif
+
+/* Macros for futimens and utimensat.  */
+#ifndef UTIME_NOW
+# define UTIME_NOW (-1)
+# define UTIME_OMIT (-2)
+#endif
+
+
+#if @GNULIB_MDA_CHMOD@
+/* On native Windows, map 'chmod' to '_chmod', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::chmod always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef chmod
+#   define chmod _chmod
+#  endif
+/* Need to cast, because in mingw the last argument is 'int mode'.  */
+_GL_CXXALIAS_MDA_CAST (chmod, int, (const char *filename, mode_t mode));
+# else
+_GL_CXXALIAS_SYS (chmod, int, (const char *filename, mode_t mode));
+# endif
+_GL_CXXALIASWARN (chmod);
+#endif
+
+
+#if @GNULIB_FCHMODAT@
+# if @REPLACE_FCHMODAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fchmodat
+#   define fchmodat rpl_fchmodat
+#  endif
+_GL_FUNCDECL_RPL (fchmodat, int,
+                  (int fd, char const *file, mode_t mode, int flag)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (fchmodat, int,
+                  (int fd, char const *file, mode_t mode, int flag));
+# else
+#  if !@HAVE_FCHMODAT@
+_GL_FUNCDECL_SYS (fchmodat, int,
+                  (int fd, char const *file, mode_t mode, int flag)
+                  _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (fchmodat, int,
+                  (int fd, char const *file, mode_t mode, int flag));
+# endif
+_GL_CXXALIASWARN (fchmodat);
+#elif defined GNULIB_POSIXCHECK
+# undef fchmodat
+# if HAVE_RAW_DECL_FCHMODAT
+_GL_WARN_ON_USE (fchmodat, "fchmodat is not portable - "
+                 "use gnulib module openat for portability");
+# endif
+#endif
+
+
+#if @GNULIB_FSTAT@
+# if @REPLACE_FSTAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fstat
+#   define fstat rpl_fstat
+#  endif
+_GL_FUNCDECL_RPL (fstat, int, (int fd, struct stat *buf) _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (fstat, int, (int fd, struct stat *buf));
+# else
+_GL_CXXALIAS_SYS (fstat, int, (int fd, struct stat *buf));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (fstat);
+# endif
+#elif @GNULIB_OVERRIDES_STRUCT_STAT@
+# undef fstat
+# define fstat fstat_used_without_requesting_gnulib_module_fstat
+#elif @WINDOWS_64_BIT_ST_SIZE@
+/* Above, we define stat to _stati64.  */
+# define fstat _fstati64
+#elif defined GNULIB_POSIXCHECK
+# undef fstat
+# if HAVE_RAW_DECL_FSTAT
+_GL_WARN_ON_USE (fstat, "fstat has portability problems - "
+                 "use gnulib module fstat for portability");
+# endif
+#endif
+
+
+#if @GNULIB_FSTATAT@
+# if @REPLACE_FSTATAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fstatat
+#   define fstatat rpl_fstatat
+#  endif
+_GL_FUNCDECL_RPL (fstatat, int,
+                  (int fd, char const *restrict name, struct stat *restrict st,
+                   int flags)
+                  _GL_ARG_NONNULL ((2, 3)));
+_GL_CXXALIAS_RPL (fstatat, int,
+                  (int fd, char const *restrict name, struct stat *restrict st,
+                   int flags));
+# else
+#  if !@HAVE_FSTATAT@
+_GL_FUNCDECL_SYS (fstatat, int,
+                  (int fd, char const *restrict name, struct stat *restrict st,
+                   int flags)
+                  _GL_ARG_NONNULL ((2, 3)));
+#  endif
+_GL_CXXALIAS_SYS (fstatat, int,
+                  (int fd, char const *restrict name, struct stat *restrict st,
+                   int flags));
+# endif
+_GL_CXXALIASWARN (fstatat);
+#elif @GNULIB_OVERRIDES_STRUCT_STAT@
+# undef fstatat
+# define fstatat fstatat_used_without_requesting_gnulib_module_fstatat
+#elif defined GNULIB_POSIXCHECK
+# undef fstatat
+# if HAVE_RAW_DECL_FSTATAT
+_GL_WARN_ON_USE (fstatat, "fstatat is not portable - "
+                 "use gnulib module openat for portability");
+# endif
+#endif
+
+
+#if @GNULIB_FUTIMENS@
+/* Use the rpl_ prefix also on Solaris <= 9, because on Solaris 9 our futimens
+   implementation relies on futimesat, which on Solaris 10 makes an invocation
+   to futimens that is meant to invoke the libc's futimens(), not gnulib's
+   futimens().  */
+# if @REPLACE_FUTIMENS@ || (!@HAVE_FUTIMENS@ && defined __sun)
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef futimens
+#   define futimens rpl_futimens
+#  endif
+_GL_FUNCDECL_RPL (futimens, int, (int fd, struct timespec const times[2]));
+_GL_CXXALIAS_RPL (futimens, int, (int fd, struct timespec const times[2]));
+# else
+#  if !@HAVE_FUTIMENS@
+_GL_FUNCDECL_SYS (futimens, int, (int fd, struct timespec const times[2]));
+#  endif
+_GL_CXXALIAS_SYS (futimens, int, (int fd, struct timespec const times[2]));
+# endif
+# if @HAVE_FUTIMENS@
+_GL_CXXALIASWARN (futimens);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef futimens
+# if HAVE_RAW_DECL_FUTIMENS
+_GL_WARN_ON_USE (futimens, "futimens is not portable - "
+                 "use gnulib module futimens for portability");
+# endif
+#endif
+
+
+#if @GNULIB_GETUMASK@
+# if !@HAVE_GETUMASK@
+_GL_FUNCDECL_SYS (getumask, mode_t, (void));
+# endif
+_GL_CXXALIAS_SYS (getumask, mode_t, (void));
+# if @HAVE_GETUMASK@
+_GL_CXXALIASWARN (getumask);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef getumask
+# if HAVE_RAW_DECL_GETUMASK
+_GL_WARN_ON_USE (getumask, "getumask is not portable - "
+                 "use gnulib module getumask for portability");
+# endif
+#endif
+
+
+#if @GNULIB_LCHMOD@
+/* Change the mode of FILENAME to MODE, without dereferencing it if FILENAME
+   denotes a symbolic link.  */
+# if !@HAVE_LCHMOD@ || defined __hpux
+_GL_FUNCDECL_SYS (lchmod, int, (const char *filename, mode_t mode)
+                               _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (lchmod, int, (const char *filename, mode_t mode));
+_GL_CXXALIASWARN (lchmod);
+#elif defined GNULIB_POSIXCHECK
+# undef lchmod
+# if HAVE_RAW_DECL_LCHMOD
+_GL_WARN_ON_USE (lchmod, "lchmod is unportable - "
+                 "use gnulib module lchmod for portability");
+# endif
+#endif
+
+
+#if @GNULIB_LSTAT@
+# if ! @HAVE_LSTAT@
+/* mingw does not support symlinks, therefore it does not have lstat.  But
+   without links, stat does just fine.  */
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define lstat stat
+#  endif
+_GL_CXXALIAS_RPL_1 (lstat, stat, int,
+                    (const char *restrict name, struct stat *restrict buf));
+# elif @REPLACE_LSTAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef lstat
+#   define lstat rpl_lstat
+#  endif
+_GL_FUNCDECL_RPL (lstat, int,
+                  (const char *restrict name, struct stat *restrict buf)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (lstat, int,
+                  (const char *restrict name, struct stat *restrict buf));
+# else
+_GL_CXXALIAS_SYS (lstat, int,
+                  (const char *restrict name, struct stat *restrict buf));
+# endif
+# if @HAVE_LSTAT@
+_GL_CXXALIASWARN (lstat);
+# endif
+#elif @GNULIB_OVERRIDES_STRUCT_STAT@
+# undef lstat
+# define lstat lstat_used_without_requesting_gnulib_module_lstat
+#elif defined GNULIB_POSIXCHECK
+# undef lstat
+# if HAVE_RAW_DECL_LSTAT
+_GL_WARN_ON_USE (lstat, "lstat is unportable - "
+                 "use gnulib module lstat for portability");
+# endif
+#endif
+
+
+#if @GNULIB_MKDIR@
+# if @REPLACE_MKDIR@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mkdir
+#   define mkdir rpl_mkdir
+#  endif
+_GL_FUNCDECL_RPL (mkdir, int, (char const *name, mode_t mode)
+                               _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (mkdir, int, (char const *name, mode_t mode));
+# elif defined _WIN32 && !defined __CYGWIN__
+/* mingw's _mkdir() function has 1 argument, but we pass 2 arguments.
+   Additionally, it declares _mkdir (and depending on compile flags, an
+   alias mkdir), only in the nonstandard includes <direct.h> and <io.h>,
+   which are included above.  */
+#  if !GNULIB_defined_rpl_mkdir
+static int
+rpl_mkdir (char const *name, mode_t mode)
+{
+  return _mkdir (name);
+}
+#   define GNULIB_defined_rpl_mkdir 1
+#  endif
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mkdir
+#   define mkdir rpl_mkdir
+#  endif
+_GL_CXXALIAS_RPL (mkdir, int, (char const *name, mode_t mode));
+# else
+_GL_CXXALIAS_SYS (mkdir, int, (char const *name, mode_t mode));
+# endif
+_GL_CXXALIASWARN (mkdir);
+#elif defined GNULIB_POSIXCHECK
+# undef mkdir
+# if HAVE_RAW_DECL_MKDIR
+_GL_WARN_ON_USE (mkdir, "mkdir does not always support two parameters - "
+                 "use gnulib module mkdir for portability");
+# endif
+#elif @GNULIB_MDA_MKDIR@
+/* On native Windows, map 'mkdir' to '_mkdir', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::mkdir always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !GNULIB_defined_rpl_mkdir
+static int
+rpl_mkdir (char const *name, mode_t mode)
+{
+  return _mkdir (name);
+}
+#   define GNULIB_defined_rpl_mkdir 1
+#  endif
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mkdir
+#   define mkdir rpl_mkdir
+#  endif
+_GL_CXXALIAS_RPL (mkdir, int, (char const *name, mode_t mode));
+# else
+_GL_CXXALIAS_SYS (mkdir, int, (char const *name, mode_t mode));
+# endif
+_GL_CXXALIASWARN (mkdir);
+#endif
+
+
+#if @GNULIB_MKDIRAT@
+# if !@HAVE_MKDIRAT@
+_GL_FUNCDECL_SYS (mkdirat, int, (int fd, char const *file, mode_t mode)
+                                _GL_ARG_NONNULL ((2)));
+# endif
+_GL_CXXALIAS_SYS (mkdirat, int, (int fd, char const *file, mode_t mode));
+_GL_CXXALIASWARN (mkdirat);
+#elif defined GNULIB_POSIXCHECK
+# undef mkdirat
+# if HAVE_RAW_DECL_MKDIRAT
+_GL_WARN_ON_USE (mkdirat, "mkdirat is not portable - "
+                 "use gnulib module openat for portability");
+# endif
+#endif
+
+
+#if @GNULIB_MKFIFO@
+# if @REPLACE_MKFIFO@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mkfifo
+#   define mkfifo rpl_mkfifo
+#  endif
+_GL_FUNCDECL_RPL (mkfifo, int, (char const *file, mode_t mode)
+                               _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (mkfifo, int, (char const *file, mode_t mode));
+# else
+#  if !@HAVE_MKFIFO@
+_GL_FUNCDECL_SYS (mkfifo, int, (char const *file, mode_t mode)
+                               _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (mkfifo, int, (char const *file, mode_t mode));
+# endif
+_GL_CXXALIASWARN (mkfifo);
+#elif defined GNULIB_POSIXCHECK
+# undef mkfifo
+# if HAVE_RAW_DECL_MKFIFO
+_GL_WARN_ON_USE (mkfifo, "mkfifo is not portable - "
+                 "use gnulib module mkfifo for portability");
+# endif
+#endif
+
+
+#if @GNULIB_MKFIFOAT@
+# if @REPLACE_MKFIFOAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mkfifoat
+#   define mkfifoat rpl_mkfifoat
+#  endif
+_GL_FUNCDECL_RPL (mkfifoat, int, (int fd, char const *file, mode_t mode)
+                                 _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (mkfifoat, int, (int fd, char const *file, mode_t mode));
+# else
+#  if !@HAVE_MKFIFOAT@
+_GL_FUNCDECL_SYS (mkfifoat, int, (int fd, char const *file, mode_t mode)
+                                 _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (mkfifoat, int, (int fd, char const *file, mode_t mode));
+# endif
+_GL_CXXALIASWARN (mkfifoat);
+#elif defined GNULIB_POSIXCHECK
+# undef mkfifoat
+# if HAVE_RAW_DECL_MKFIFOAT
+_GL_WARN_ON_USE (mkfifoat, "mkfifoat is not portable - "
+                 "use gnulib module mkfifoat for portability");
+# endif
+#endif
+
+
+#if @GNULIB_MKNOD@
+# if @REPLACE_MKNOD@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mknod
+#   define mknod rpl_mknod
+#  endif
+_GL_FUNCDECL_RPL (mknod, int, (char const *file, mode_t mode, dev_t dev)
+                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (mknod, int, (char const *file, mode_t mode, dev_t dev));
+# else
+#  if !@HAVE_MKNOD@
+_GL_FUNCDECL_SYS (mknod, int, (char const *file, mode_t mode, dev_t dev)
+                              _GL_ARG_NONNULL ((1)));
+#  endif
+/* Need to cast, because on OSF/1 5.1, the third parameter is '...'.  */
+_GL_CXXALIAS_SYS_CAST (mknod, int, (char const *file, mode_t mode, dev_t dev));
+# endif
+_GL_CXXALIASWARN (mknod);
+#elif defined GNULIB_POSIXCHECK
+# undef mknod
+# if HAVE_RAW_DECL_MKNOD
+_GL_WARN_ON_USE (mknod, "mknod is not portable - "
+                 "use gnulib module mknod for portability");
+# endif
+#endif
+
+
+#if @GNULIB_MKNODAT@
+# if @REPLACE_MKNODAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mknodat
+#   define mknodat rpl_mknodat
+#  endif
+_GL_FUNCDECL_RPL (mknodat, int,
+                  (int fd, char const *file, mode_t mode, dev_t dev)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (mknodat, int,
+                  (int fd, char const *file, mode_t mode, dev_t dev));
+# else
+#  if !@HAVE_MKNODAT@
+_GL_FUNCDECL_SYS (mknodat, int,
+                  (int fd, char const *file, mode_t mode, dev_t dev)
+                  _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (mknodat, int,
+                  (int fd, char const *file, mode_t mode, dev_t dev));
+# endif
+_GL_CXXALIASWARN (mknodat);
+#elif defined GNULIB_POSIXCHECK
+# undef mknodat
+# if HAVE_RAW_DECL_MKNODAT
+_GL_WARN_ON_USE (mknodat, "mknodat is not portable - "
+                 "use gnulib module mkfifoat for portability");
+# endif
+#endif
+
+
+#if @GNULIB_STAT@
+# if @REPLACE_STAT@
+#  if !@GNULIB_OVERRIDES_STRUCT_STAT@
+    /* We can't use the object-like #define stat rpl_stat, because of
+       struct stat.  This means that rpl_stat will not be used if the user
+       does (stat)(a,b).  Oh well.  */
+#   if defined _AIX && defined stat && defined _LARGE_FILES
+     /* With _LARGE_FILES defined, AIX (only) defines stat to stat64,
+        so we have to replace stat64() instead of stat(). */
+#    undef stat64
+#    define stat64(name, st) rpl_stat (name, st)
+#   elif @WINDOWS_64_BIT_ST_SIZE@
+     /* Above, we define stat to _stati64.  */
+#    if defined __MINGW32__ && defined _stati64
+#     ifndef _USE_32BIT_TIME_T
+       /* The system headers define _stati64 to _stat64.  */
+#      undef _stat64
+#      define _stat64(name, st) rpl_stat (name, st)
+#     endif
+#    elif defined _MSC_VER && defined _stati64
+#     ifdef _USE_32BIT_TIME_T
+       /* The system headers define _stati64 to _stat32i64.  */
+#      undef _stat32i64
+#      define _stat32i64(name, st) rpl_stat (name, st)
+#     else
+       /* The system headers define _stati64 to _stat64.  */
+#      undef _stat64
+#      define _stat64(name, st) rpl_stat (name, st)
+#     endif
+#    else
+#     undef _stati64
+#     define _stati64(name, st) rpl_stat (name, st)
+#    endif
+#   elif defined __MINGW32__ && defined stat
+#    ifdef _USE_32BIT_TIME_T
+      /* The system headers define stat to _stat32i64.  */
+#     undef _stat32i64
+#     define _stat32i64(name, st) rpl_stat (name, st)
+#    else
+      /* The system headers define stat to _stat64.  */
+#     undef _stat64
+#     define _stat64(name, st) rpl_stat (name, st)
+#    endif
+#   elif defined _MSC_VER && defined stat
+#    ifdef _USE_32BIT_TIME_T
+      /* The system headers define stat to _stat32.  */
+#     undef _stat32
+#     define _stat32(name, st) rpl_stat (name, st)
+#    else
+      /* The system headers define stat to _stat64i32.  */
+#     undef _stat64i32
+#     define _stat64i32(name, st) rpl_stat (name, st)
+#    endif
+#   else /* !(_AIX || __MINGW32__ || _MSC_VER) */
+#    undef stat
+#    define stat(name, st) rpl_stat (name, st)
+#   endif /* !_LARGE_FILES */
+#  endif /* !@GNULIB_OVERRIDES_STRUCT_STAT@ */
+_GL_EXTERN_C int stat (const char *restrict name, struct stat *restrict buf)
+                      _GL_ARG_NONNULL ((1, 2));
+# endif
+#elif @GNULIB_OVERRIDES_STRUCT_STAT@
+/* see above:
+  #define stat stat_used_without_requesting_gnulib_module_stat
+ */
+#elif defined GNULIB_POSIXCHECK
+# undef stat
+# if HAVE_RAW_DECL_STAT
+_GL_WARN_ON_USE (stat, "stat is unportable - "
+                 "use gnulib module stat for portability");
+# endif
+#endif
+
+
+#if @GNULIB_MDA_UMASK@
+/* On native Windows, map 'umask' to '_umask', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::umask always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef umask
+#   define umask _umask
+#  endif
+/* Need to cast, because in mingw the last argument is 'int mode'.  */
+_GL_CXXALIAS_MDA_CAST (umask, mode_t, (mode_t mask));
+# else
+_GL_CXXALIAS_SYS (umask, mode_t, (mode_t mask));
+# endif
+_GL_CXXALIASWARN (umask);
+#endif
+
+
+#if @GNULIB_UTIMENSAT@
+/* Use the rpl_ prefix also on Solaris <= 9, because on Solaris 9 our utimensat
+   implementation relies on futimesat, which on Solaris 10 makes an invocation
+   to utimensat that is meant to invoke the libc's utimensat(), not gnulib's
+   utimensat().  */
+# if @REPLACE_UTIMENSAT@ || (!@HAVE_UTIMENSAT@ && defined __sun)
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef utimensat
+#   define utimensat rpl_utimensat
+#  endif
+_GL_FUNCDECL_RPL (utimensat, int, (int fd, char const *name,
+                                   struct timespec const times[2], int flag)
+                                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (utimensat, int, (int fd, char const *name,
+                                   struct timespec const times[2], int flag));
+# else
+#  if !@HAVE_UTIMENSAT@
+_GL_FUNCDECL_SYS (utimensat, int, (int fd, char const *name,
+                                   struct timespec const times[2], int flag)
+                                  _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (utimensat, int, (int fd, char const *name,
+                                   struct timespec const times[2], int flag));
+# endif
+# if @HAVE_UTIMENSAT@
+_GL_CXXALIASWARN (utimensat);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef utimensat
+# if HAVE_RAW_DECL_UTIMENSAT
+_GL_WARN_ON_USE (utimensat, "utimensat is not portable - "
+                 "use gnulib module utimensat for portability");
+# endif
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_SYS_STAT_H */
+#endif /* _@GUARD_PREFIX@_SYS_STAT_H */
+#endif
diff --git a/src/grep/lib/sys_types.in.h b/src/grep/lib/sys_types.in.h
new file mode 100644
index 0000000..2079d72
--- /dev/null
+++ b/src/grep/lib/sys_types.in.h
@@ -0,0 +1,106 @@
+/* Provide a more complete sys/types.h.
+
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if defined _WIN32 && !defined __CYGWIN__ \
+    && (defined __need_off_t || defined __need___off64_t \
+        || defined __need_ssize_t || defined __need_time_t)
+
+/* Special invocation convention inside mingw header files.  */
+
+#@INCLUDE_NEXT@ @NEXT_SYS_TYPES_H@
+
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_SYS_TYPES_H
+
+/* The include_next requires a split double-inclusion guard.  */
+# define _GL_INCLUDING_SYS_TYPES_H
+#@INCLUDE_NEXT@ @NEXT_SYS_TYPES_H@
+# undef _GL_INCLUDING_SYS_TYPES_H
+
+#ifndef _@GUARD_PREFIX@_SYS_TYPES_H
+#define _@GUARD_PREFIX@_SYS_TYPES_H
+
+/* Override off_t if Large File Support is requested on native Windows.  */
+#if @WINDOWS_64_BIT_OFF_T@
+/* Same as int64_t in <stdint.h>.  */
+# if defined _MSC_VER
+#  define off_t __int64
+# else
+#  define off_t long long int
+# endif
+/* Indicator, for gnulib internal purposes.  */
+# define _GL_WINDOWS_64_BIT_OFF_T 1
+#endif
+
+/* Override dev_t and ino_t if distinguishable inodes support is requested
+   on native Windows.  */
+#if @WINDOWS_STAT_INODES@
+
+# if @WINDOWS_STAT_INODES@ == 2
+/* Experimental, not useful in Windows 10.  */
+
+/* Define dev_t to a 64-bit type.  */
+#  if !defined GNULIB_defined_dev_t
+typedef unsigned long long int rpl_dev_t;
+#   undef dev_t
+#   define dev_t rpl_dev_t
+#   define GNULIB_defined_dev_t 1
+#  endif
+
+/* Define ino_t to a 128-bit type.  */
+#  if !defined GNULIB_defined_ino_t
+/* MSVC does not have a 128-bit integer type.
+   GCC has a 128-bit integer type __int128, but only on 64-bit targets.  */
+typedef struct { unsigned long long int _gl_ino[2]; } rpl_ino_t;
+#   undef ino_t
+#   define ino_t rpl_ino_t
+#   define GNULIB_defined_ino_t 1
+#  endif
+
+# else /* @WINDOWS_STAT_INODES@ == 1 */
+
+/* Define ino_t to a 64-bit type.  */
+#  if !defined GNULIB_defined_ino_t
+typedef unsigned long long int rpl_ino_t;
+#   undef ino_t
+#   define ino_t rpl_ino_t
+#   define GNULIB_defined_ino_t 1
+#  endif
+
+# endif
+
+/* Indicator, for gnulib internal purposes.  */
+# define _GL_WINDOWS_STAT_INODES @WINDOWS_STAT_INODES@
+
+#endif
+
+/* MSVC 9 defines size_t in <stddef.h>, not in <sys/types.h>.  */
+/* But avoid namespace pollution on glibc systems.  */
+#if (defined _WIN32 && ! defined __CYGWIN__) && ! defined __GLIBC__
+# include <stddef.h>
+#endif
+
+#endif /* _@GUARD_PREFIX@_SYS_TYPES_H */
+#endif /* _@GUARD_PREFIX@_SYS_TYPES_H */
+#endif /* __need_XXX */
diff --git a/src/grep/lib/time.in.h b/src/grep/lib/time.in.h
new file mode 100644
index 0000000..a73fe59
--- /dev/null
+++ b/src/grep/lib/time.in.h
@@ -0,0 +1,441 @@
+/* A more-standard <time.h>.
+
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* Don't get in the way of glibc when it includes time.h merely to
+   declare a few standard symbols, rather than to declare all the
+   symbols.  (However, skip this for MinGW as it treats __need_time_t
+   incompatibly.)  Also, Solaris 8 <time.h> eventually includes itself
+   recursively; if that is happening, just include the system <time.h>
+   without adding our own declarations.  */
+#if (((defined __need_time_t || defined __need_clock_t \
+       || defined __need_timespec)                     \
+      && !defined __MINGW32__)                         \
+     || defined _@GUARD_PREFIX@_TIME_H)
+
+# @INCLUDE_NEXT@ @NEXT_TIME_H@
+
+#else
+
+# define _@GUARD_PREFIX@_TIME_H
+
+/* mingw's <time.h> provides the functions asctime_r, ctime_r, gmtime_r,
+   localtime_r only if <unistd.h> or <pthread.h> has been included before.  */
+# if defined __MINGW32__
+#  include <unistd.h>
+# endif
+
+# @INCLUDE_NEXT@ @NEXT_TIME_H@
+
+/* NetBSD 5.0 mis-defines NULL.  */
+# include <stddef.h>
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+/* Some systems don't define struct timespec (e.g., AIX 4.1).
+   Or they define it with the wrong member names or define it in <sys/time.h>
+   (e.g., FreeBSD circa 1997).  Stock Mingw prior to 3.0 does not define it,
+   but the pthreads-win32 library defines it in <pthread.h>.  */
+# if ! @TIME_H_DEFINES_STRUCT_TIMESPEC@
+#  if @SYS_TIME_H_DEFINES_STRUCT_TIMESPEC@
+#   include <sys/time.h>
+#  elif @PTHREAD_H_DEFINES_STRUCT_TIMESPEC@
+#   include <pthread.h>
+#  elif @UNISTD_H_DEFINES_STRUCT_TIMESPEC@
+#   include <unistd.h>
+#  else
+
+#   ifdef __cplusplus
+extern "C" {
+#   endif
+
+#   if !GNULIB_defined_struct_timespec
+#    undef timespec
+#    define timespec rpl_timespec
+struct timespec
+{
+  time_t tv_sec;
+  long int tv_nsec;
+};
+#    define GNULIB_defined_struct_timespec 1
+#   endif
+
+#   ifdef __cplusplus
+}
+#   endif
+
+#  endif
+# endif
+
+# if !GNULIB_defined_struct_time_t_must_be_integral
+/* https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_types.h.html
+   requires time_t to be an integer type, even though C99 permits floating
+   point.  We don't know of any implementation that uses floating
+   point, and it is much easier to write code that doesn't have to
+   worry about that corner case, so we force the issue.  */
+struct __time_t_must_be_integral {
+  unsigned int __floating_time_t_unsupported : (time_t) 1;
+};
+#  define GNULIB_defined_struct_time_t_must_be_integral 1
+# endif
+
+/* Define TIME_UTC, a positive integer constant used for timespec_get().  */
+# if ! @TIME_H_DEFINES_TIME_UTC@
+#  if !GNULIB_defined_TIME_UTC
+#   define TIME_UTC 1
+#   define GNULIB_defined_TIME_UTC 1
+#  endif
+# endif
+
+/* Set *TS to the current time, and return BASE.
+   Upon failure, return 0.  */
+# if @GNULIB_TIMESPEC_GET@
+#  if ! @HAVE_TIMESPEC_GET@
+_GL_FUNCDECL_SYS (timespec_get, int, (struct timespec *ts, int base)
+                                     _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (timespec_get, int, (struct timespec *ts, int base));
+_GL_CXXALIASWARN (timespec_get);
+# endif
+
+/* Sleep for at least RQTP seconds unless interrupted,  If interrupted,
+   return -1 and store the remaining time into RMTP.  See
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/nanosleep.html>.  */
+# if @GNULIB_NANOSLEEP@
+#  if @REPLACE_NANOSLEEP@
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    define nanosleep rpl_nanosleep
+#   endif
+_GL_FUNCDECL_RPL (nanosleep, int,
+                  (struct timespec const *__rqtp, struct timespec *__rmtp)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (nanosleep, int,
+                  (struct timespec const *__rqtp, struct timespec *__rmtp));
+#  else
+#   if ! @HAVE_NANOSLEEP@
+_GL_FUNCDECL_SYS (nanosleep, int,
+                  (struct timespec const *__rqtp, struct timespec *__rmtp)
+                  _GL_ARG_NONNULL ((1)));
+#   endif
+_GL_CXXALIAS_SYS (nanosleep, int,
+                  (struct timespec const *__rqtp, struct timespec *__rmtp));
+#  endif
+_GL_CXXALIASWARN (nanosleep);
+# endif
+
+/* Initialize time conversion information.  */
+# if @GNULIB_TZSET@
+#  if @REPLACE_TZSET@
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    undef tzset
+#    define tzset rpl_tzset
+#   endif
+_GL_FUNCDECL_RPL (tzset, void, (void));
+_GL_CXXALIAS_RPL (tzset, void, (void));
+#  elif defined _WIN32 && !defined __CYGWIN__
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    undef tzset
+#    define tzset _tzset
+#   endif
+_GL_CXXALIAS_MDA (tzset, void, (void));
+#  else
+_GL_CXXALIAS_SYS (tzset, void, (void));
+#  endif
+_GL_CXXALIASWARN (tzset);
+# elif @GNULIB_MDA_TZSET@
+/* On native Windows, map 'tzset' to '_tzset', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::tzset always.  */
+#  if defined _WIN32 && !defined __CYGWIN__
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    undef tzset
+#    define tzset _tzset
+#   endif
+_GL_CXXALIAS_MDA (tzset, void, (void));
+#  else
+_GL_CXXALIAS_SYS (tzset, void, (void));
+#  endif
+_GL_CXXALIASWARN (tzset);
+# endif
+
+/* Return the 'time_t' representation of TP and normalize TP.  */
+# if @GNULIB_MKTIME@
+#  if @REPLACE_MKTIME@
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    define mktime rpl_mktime
+#   endif
+_GL_FUNCDECL_RPL (mktime, time_t, (struct tm *__tp) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (mktime, time_t, (struct tm *__tp));
+#  else
+_GL_CXXALIAS_SYS (mktime, time_t, (struct tm *__tp));
+#  endif
+#  if __GLIBC__ >= 2
+_GL_CXXALIASWARN (mktime);
+#  endif
+# endif
+
+/* Convert TIMER to RESULT, assuming local time and UTC respectively.  See
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/localtime_r.html> and
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/gmtime_r.html>.  */
+# if @GNULIB_TIME_R@
+#  if @REPLACE_LOCALTIME_R@
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    undef localtime_r
+#    define localtime_r rpl_localtime_r
+#   endif
+_GL_FUNCDECL_RPL (localtime_r, struct tm *, (time_t const *restrict __timer,
+                                             struct tm *restrict __result)
+                                            _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (localtime_r, struct tm *, (time_t const *restrict __timer,
+                                             struct tm *restrict __result));
+#  else
+#   if ! @HAVE_DECL_LOCALTIME_R@
+_GL_FUNCDECL_SYS (localtime_r, struct tm *, (time_t const *restrict __timer,
+                                             struct tm *restrict __result)
+                                            _GL_ARG_NONNULL ((1, 2)));
+#   endif
+_GL_CXXALIAS_SYS (localtime_r, struct tm *, (time_t const *restrict __timer,
+                                             struct tm *restrict __result));
+#  endif
+#  if @HAVE_DECL_LOCALTIME_R@
+_GL_CXXALIASWARN (localtime_r);
+#  endif
+#  if @REPLACE_LOCALTIME_R@
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    undef gmtime_r
+#    define gmtime_r rpl_gmtime_r
+#   endif
+_GL_FUNCDECL_RPL (gmtime_r, struct tm *, (time_t const *restrict __timer,
+                                          struct tm *restrict __result)
+                                         _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (gmtime_r, struct tm *, (time_t const *restrict __timer,
+                                          struct tm *restrict __result));
+#  else
+#   if ! @HAVE_DECL_LOCALTIME_R@
+_GL_FUNCDECL_SYS (gmtime_r, struct tm *, (time_t const *restrict __timer,
+                                          struct tm *restrict __result)
+                                         _GL_ARG_NONNULL ((1, 2)));
+#   endif
+_GL_CXXALIAS_SYS (gmtime_r, struct tm *, (time_t const *restrict __timer,
+                                          struct tm *restrict __result));
+#  endif
+#  if @HAVE_DECL_LOCALTIME_R@
+_GL_CXXALIASWARN (gmtime_r);
+#  endif
+# endif
+
+/* Convert TIMER to RESULT, assuming local time and UTC respectively.  See
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/localtime.html> and
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/gmtime.html>.  */
+# if @GNULIB_LOCALTIME@ || @REPLACE_LOCALTIME@
+#  if @REPLACE_LOCALTIME@
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    undef localtime
+#    define localtime rpl_localtime
+#   endif
+_GL_FUNCDECL_RPL (localtime, struct tm *, (time_t const *__timer)
+                                          _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (localtime, struct tm *, (time_t const *__timer));
+#  else
+_GL_CXXALIAS_SYS (localtime, struct tm *, (time_t const *__timer));
+#  endif
+#  if __GLIBC__ >= 2
+_GL_CXXALIASWARN (localtime);
+#  endif
+# endif
+
+# if 0 || @REPLACE_GMTIME@
+#  if @REPLACE_GMTIME@
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    undef gmtime
+#    define gmtime rpl_gmtime
+#   endif
+_GL_FUNCDECL_RPL (gmtime, struct tm *, (time_t const *__timer)
+                                       _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (gmtime, struct tm *, (time_t const *__timer));
+#  else
+_GL_CXXALIAS_SYS (gmtime, struct tm *, (time_t const *__timer));
+#  endif
+_GL_CXXALIASWARN (gmtime);
+# endif
+
+/* Parse BUF as a timestamp, assuming FORMAT specifies its layout, and store
+   the resulting broken-down time into TM.  See
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/strptime.html>.  */
+# if @GNULIB_STRPTIME@
+#  if ! @HAVE_STRPTIME@
+_GL_FUNCDECL_SYS (strptime, char *, (char const *restrict __buf,
+                                     char const *restrict __format,
+                                     struct tm *restrict __tm)
+                                    _GL_ARG_NONNULL ((1, 2, 3)));
+#  endif
+_GL_CXXALIAS_SYS (strptime, char *, (char const *restrict __buf,
+                                     char const *restrict __format,
+                                     struct tm *restrict __tm));
+_GL_CXXALIASWARN (strptime);
+# endif
+
+/* Convert *TP to a date and time string.  See
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/ctime.html>.  */
+# if @GNULIB_CTIME@
+#  if @REPLACE_CTIME@
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    define ctime rpl_ctime
+#   endif
+_GL_FUNCDECL_RPL (ctime, char *, (time_t const *__tp)
+                                 _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (ctime, char *, (time_t const *__tp));
+#  else
+_GL_CXXALIAS_SYS (ctime, char *, (time_t const *__tp));
+#  endif
+#  if __GLIBC__ >= 2
+_GL_CXXALIASWARN (ctime);
+#  endif
+# endif
+
+/* Convert *TP to a date and time string.  See
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/strftime.html>.  */
+# if @GNULIB_STRFTIME@
+#  if @REPLACE_STRFTIME@
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    define strftime rpl_strftime
+#   endif
+_GL_FUNCDECL_RPL (strftime, size_t,
+                  (char *restrict __buf, size_t __bufsize,
+                   const char *restrict __fmt, const struct tm *restrict __tp)
+                  _GL_ARG_NONNULL ((1, 3, 4)));
+_GL_CXXALIAS_RPL (strftime, size_t,
+                  (char *restrict __buf, size_t __bufsize,
+                   const char *restrict __fmt, const struct tm *restrict __tp));
+#  else
+_GL_CXXALIAS_SYS (strftime, size_t,
+                  (char *restrict __buf, size_t __bufsize,
+                   const char *restrict __fmt, const struct tm *restrict __tp));
+#  endif
+#  if __GLIBC__ >= 2
+_GL_CXXALIASWARN (strftime);
+#  endif
+# endif
+
+# if defined _GNU_SOURCE && @GNULIB_TIME_RZ@ && ! @HAVE_TIMEZONE_T@
+/* Functions that use a first-class time zone data type, instead of
+   relying on an implicit global time zone.
+   Inspired by NetBSD.  */
+
+/* Represents a time zone.
+   (timezone_t) NULL stands for UTC.  */
+typedef struct tm_zone *timezone_t;
+
+/* tzalloc (name)
+   Returns a time zone object for the given time zone NAME.  This object
+   represents the time zone that other functions would use it the TZ
+   environment variable was set to NAME.
+   If NAME is NULL, the result represents the time zone that other functions
+   would use it the TZ environment variable was unset.
+   May return NULL if NAME is invalid (this is platform dependent) or
+   upon memory allocation failure.  */
+_GL_FUNCDECL_SYS (tzalloc, timezone_t, (char const *__name));
+_GL_CXXALIAS_SYS (tzalloc, timezone_t, (char const *__name));
+
+/* tzfree (tz)
+   Frees a time zone object.
+   The argument must have been returned by tzalloc().  */
+_GL_FUNCDECL_SYS (tzfree, void, (timezone_t __tz));
+_GL_CXXALIAS_SYS (tzfree, void, (timezone_t __tz));
+
+/* localtime_rz (tz, &t, &result)
+   Converts an absolute time T to a broken-down time RESULT, assuming the
+   time zone TZ.
+   This function is like 'localtime_r', but relies on the argument TZ instead
+   of an implicit global time zone.  */
+_GL_FUNCDECL_SYS (localtime_rz, struct tm *,
+                  (timezone_t __tz, time_t const *restrict __timer,
+                   struct tm *restrict __result) _GL_ARG_NONNULL ((2, 3)));
+_GL_CXXALIAS_SYS (localtime_rz, struct tm *,
+                  (timezone_t __tz, time_t const *restrict __timer,
+                   struct tm *restrict __result));
+
+/* mktime_z (tz, &tm)
+   Normalizes the broken-down time TM and converts it to an absolute time,
+   assuming the time zone TZ.  Returns the absolute time.
+   This function is like 'mktime', but relies on the argument TZ instead
+   of an implicit global time zone.  */
+_GL_FUNCDECL_SYS (mktime_z, time_t,
+                  (timezone_t __tz, struct tm *restrict __tm)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_SYS (mktime_z, time_t,
+                  (timezone_t __tz, struct tm *restrict __tm));
+
+/* Time zone abbreviation strings (returned by 'localtime_rz' or 'mktime_z'
+   in the 'tm_zone' member of 'struct tm') are valid as long as
+     - the 'struct tm' argument is not destroyed or overwritten,
+   and
+     - the 'timezone_t' argument is not freed through tzfree().  */
+
+# endif
+
+/* Convert TM to a time_t value, assuming UTC.  */
+# if @GNULIB_TIMEGM@
+#  if @REPLACE_TIMEGM@
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    undef timegm
+#    define timegm rpl_timegm
+#   endif
+_GL_FUNCDECL_RPL (timegm, time_t, (struct tm *__tm) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (timegm, time_t, (struct tm *__tm));
+#  else
+#   if ! @HAVE_TIMEGM@
+_GL_FUNCDECL_SYS (timegm, time_t, (struct tm *__tm) _GL_ARG_NONNULL ((1)));
+#   endif
+_GL_CXXALIAS_SYS (timegm, time_t, (struct tm *__tm));
+#  endif
+_GL_CXXALIASWARN (timegm);
+# endif
+
+/* Encourage applications to avoid unsafe functions that can overrun
+   buffers when given outlandish struct tm values.  Portable
+   applications should use strftime (or even sprintf) instead.  */
+# if defined GNULIB_POSIXCHECK
+#  undef asctime
+_GL_WARN_ON_USE (asctime, "asctime can overrun buffers in some cases - "
+                 "better use strftime (or even sprintf) instead");
+# endif
+# if defined GNULIB_POSIXCHECK
+#  undef asctime_r
+_GL_WARN_ON_USE (asctime_r, "asctime_r can overrun buffers in some cases - "
+                 "better use strftime (or even sprintf) instead");
+# endif
+# if defined GNULIB_POSIXCHECK
+#  undef ctime
+_GL_WARN_ON_USE (ctime, "ctime can overrun buffers in some cases - "
+                 "better use strftime (or even sprintf) instead");
+# endif
+# if defined GNULIB_POSIXCHECK
+#  undef ctime_r
+_GL_WARN_ON_USE (ctime_r, "ctime_r can overrun buffers in some cases - "
+                 "better use strftime (or even sprintf) instead");
+# endif
+
+#endif
diff --git a/src/grep/lib/trim.c b/src/grep/lib/trim.c
new file mode 100644
index 0000000..30e7d5b
--- /dev/null
+++ b/src/grep/lib/trim.c
@@ -0,0 +1,129 @@
+/* Removes leading and/or trailing whitespaces
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Davide Angelocola <davide.angelocola@gmail.com> */
+
+#include <config.h>
+
+/* Specification.  */
+#include "trim.h"
+
+#include <ctype.h>
+#include <string.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+#include "mbchar.h"
+#include "mbiter.h"
+#include "xalloc.h"
+
+/* Use this to suppress gcc's "...may be used before initialized" warnings. */
+#if defined GCC_LINT || defined lint
+# define IF_LINT(Code) Code
+#else
+# define IF_LINT(Code) /* empty */
+#endif
+
+char *
+trim2 (const char *s, int how)
+{
+  char *d;
+
+  d = strdup (s);
+
+  if (!d)
+    xalloc_die ();
+
+  if (MB_CUR_MAX > 1)
+    {
+      mbi_iterator_t i;
+
+      /* Trim leading whitespaces. */
+      if (how != TRIM_TRAILING)
+        {
+          mbi_init (i, d, strlen (d));
+
+          for (; mbi_avail (i) && mb_isspace (mbi_cur (i)); mbi_advance (i))
+            ;
+
+          memmove (d, mbi_cur_ptr (i), strlen (mbi_cur_ptr (i)) + 1);
+        }
+
+      /* Trim trailing whitespaces. */
+      if (how != TRIM_LEADING)
+        {
+          unsigned int state = 0;
+          char *r IF_LINT (= NULL); /* used only while state = 2 */
+
+          mbi_init (i, d, strlen (d));
+
+          for (; mbi_avail (i); mbi_advance (i))
+            {
+              if (state == 0 && mb_isspace (mbi_cur (i)))
+                continue;
+
+              if (state == 0 && !mb_isspace (mbi_cur (i)))
+                {
+                  state = 1;
+                  continue;
+                }
+
+              if (state == 1 && !mb_isspace (mbi_cur (i)))
+                continue;
+
+              if (state == 1 && mb_isspace (mbi_cur (i)))
+                {
+                  state = 2;
+                  r = (char *) mbi_cur_ptr (i);
+                }
+              else if (state == 2 && mb_isspace (mbi_cur (i)))
+                {
+                  /* empty */
+                }
+              else
+                {
+                  state = 1;
+                }
+            }
+
+          if (state == 2)
+            *r = '\0';
+        }
+    }
+  else
+    {
+      char *p;
+
+      /* Trim leading whitespaces. */
+      if (how != TRIM_TRAILING)
+        {
+          for (p = d; *p && isspace ((unsigned char) *p); p++)
+            ;
+
+          memmove (d, p, strlen (p) + 1);
+        }
+
+      /* Trim trailing whitespaces. */
+      if (how != TRIM_LEADING)
+        {
+          for (p = d + strlen (d) - 1;
+               p >= d && isspace ((unsigned char) *p); p--)
+            *p = '\0';
+        }
+    }
+
+  return d;
+}
diff --git a/src/grep/lib/trim.h b/src/grep/lib/trim.h
new file mode 100644
index 0000000..761b8a6
--- /dev/null
+++ b/src/grep/lib/trim.h
@@ -0,0 +1,37 @@
+/* Removes leading and/or trailing whitespaces
+   Copyright (C) 2006, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Davide Angelocola <davide.angelocola@gmail.com> */
+
+#include <stdlib.h>
+
+/* Trim mode. */
+#define TRIM_TRAILING 0
+#define TRIM_LEADING 1
+#define TRIM_BOTH 2
+
+/* Removes trailing and leading whitespaces. */
+#define trim(s) trim2(s, TRIM_BOTH)
+
+/* Removes trailing whitespaces. */
+#define trim_trailing(s) trim2(s, TRIM_TRAILING)
+
+/* Removes leading whitespaces. */
+#define trim_leading(s) trim2(s, TRIM_LEADING)
+
+char *trim2 (const char *, int)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_RETURNS_NONNULL;
diff --git a/src/grep/lib/unistd--.h b/src/grep/lib/unistd--.h
new file mode 100644
index 0000000..5e6ecb0
--- /dev/null
+++ b/src/grep/lib/unistd--.h
@@ -0,0 +1,32 @@
+/* Like unistd.h, but redefine some names to avoid glitches.
+
+   Copyright (C) 2005, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+#include <unistd.h>
+#include "unistd-safer.h"
+
+#undef dup
+#define dup dup_safer
+
+#undef pipe
+#define pipe pipe_safer
+
+#if GNULIB_PIPE2_SAFER
+# undef pipe2
+# define pipe2 pipe2_safer
+#endif
diff --git a/src/grep/lib/unistd-safer.h b/src/grep/lib/unistd-safer.h
new file mode 100644
index 0000000..541bafe
--- /dev/null
+++ b/src/grep/lib/unistd-safer.h
@@ -0,0 +1,31 @@
+/* Invoke unistd-like functions, but avoid some glitches.
+
+   Copyright (C) 2001, 2003, 2005, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert and Eric Blake.  */
+
+int dup_safer (int);
+int fd_safer (int);
+int pipe_safer (int[2]);
+
+#if GNULIB_FD_SAFER_FLAG
+int dup_safer_flag (int, int);
+int fd_safer_flag (int, int);
+#endif
+
+#if GNULIB_PIPE2_SAFER
+int pipe2_safer (int[2], int);
+#endif
diff --git a/src/grep/lib/unistd.c b/src/grep/lib/unistd.c
new file mode 100644
index 0000000..0763456
--- /dev/null
+++ b/src/grep/lib/unistd.c
@@ -0,0 +1,22 @@
+/* Inline functions for <unistd.h>.
+
+   Copyright (C) 2012-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#define _GL_UNISTD_INLINE _GL_EXTERN_INLINE
+#include "unistd.h"
+typedef int dummy;
diff --git a/src/grep/lib/unistd.in.h b/src/grep/lib/unistd.in.h
new file mode 100644
index 0000000..73c882f
--- /dev/null
+++ b/src/grep/lib/unistd.in.h
@@ -0,0 +1,2312 @@
+/* Substitute for and wrapper around <unistd.h>.
+   Copyright (C) 2003-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _@GUARD_PREFIX@_UNISTD_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if @HAVE_UNISTD_H@ && defined _GL_INCLUDING_UNISTD_H
+/* Special invocation convention:
+   - On Mac OS X 10.3.9 we have a sequence of nested includes
+     <unistd.h> -> <signal.h> -> <pthread.h> -> <unistd.h>
+     In this situation, the functions are not yet declared, therefore we cannot
+     provide the C++ aliases.  */
+
+#@INCLUDE_NEXT@ @NEXT_UNISTD_H@
+
+#else
+/* Normal invocation convention.  */
+
+/* The include_next requires a split double-inclusion guard.  */
+#if @HAVE_UNISTD_H@
+# define _GL_INCLUDING_UNISTD_H
+# @INCLUDE_NEXT@ @NEXT_UNISTD_H@
+# undef _GL_INCLUDING_UNISTD_H
+#endif
+
+/* Get all possible declarations of gethostname().  */
+#if @GNULIB_GETHOSTNAME@ && @UNISTD_H_HAVE_WINSOCK2_H@ \
+  && !defined _GL_INCLUDING_WINSOCK2_H
+# define _GL_INCLUDING_WINSOCK2_H
+# include <winsock2.h>
+# undef _GL_INCLUDING_WINSOCK2_H
+#endif
+
+#if !defined _@GUARD_PREFIX@_UNISTD_H && !defined _GL_INCLUDING_WINSOCK2_H
+#define _@GUARD_PREFIX@_UNISTD_H
+
+/* NetBSD 5.0 mis-defines NULL.  Also get size_t.  */
+/* But avoid namespace pollution on glibc systems.  */
+#ifndef __GLIBC__
+# include <stddef.h>
+#endif
+
+/* mingw doesn't define the SEEK_* or *_FILENO macros in <unistd.h>.  */
+/* MSVC declares 'unlink' in <stdio.h>, not in <unistd.h>.  We must include
+   it before we  #define unlink rpl_unlink.  */
+/* Cygwin 1.7.1 declares symlinkat in <stdio.h>, not in <unistd.h>.  */
+/* But avoid namespace pollution on glibc systems.  */
+#if (!(defined SEEK_CUR && defined SEEK_END && defined SEEK_SET) \
+     || ((@GNULIB_UNLINK@ || defined GNULIB_POSIXCHECK) \
+         && (defined _WIN32 && ! defined __CYGWIN__)) \
+     || ((@GNULIB_SYMLINKAT@ || defined GNULIB_POSIXCHECK) \
+         && defined __CYGWIN__)) \
+    && ! defined __GLIBC__
+# include <stdio.h>
+#endif
+
+/* Cygwin 1.7.1 and Android 4.3 declare unlinkat in <fcntl.h>, not in
+   <unistd.h>.  */
+/* But avoid namespace pollution on glibc systems.  */
+#if (@GNULIB_UNLINKAT@ || defined GNULIB_POSIXCHECK) \
+    && (defined __CYGWIN__ || defined __ANDROID__) \
+    && ! defined __GLIBC__
+# include <fcntl.h>
+#endif
+
+/* mingw fails to declare _exit in <unistd.h>.  */
+/* mingw, MSVC, BeOS, Haiku declare environ in <stdlib.h>, not in
+   <unistd.h>.  */
+/* Solaris declares getcwd not only in <unistd.h> but also in <stdlib.h>.  */
+/* OSF Tru64 Unix cannot see gnulib rpl_strtod when system <stdlib.h> is
+   included here.  */
+/* But avoid namespace pollution on glibc systems.  */
+#if !defined __GLIBC__ && !defined __osf__
+# define __need_system_stdlib_h
+# include <stdlib.h>
+# undef __need_system_stdlib_h
+#endif
+
+/* Native Windows platforms declare _chdir, _getcwd, _rmdir in
+   <io.h> and/or <direct.h>, not in <unistd.h>.
+   They also declare _access(), _chmod(), _close(), _dup(), _dup2(), _isatty(),
+   _lseek(), _read(), _unlink(), _write() in <io.h>.  */
+#if defined _WIN32 && !defined __CYGWIN__
+# include <io.h>
+# include <direct.h>
+#endif
+
+/* Native Windows platforms declare _execl*, _execv* in <process.h>.  */
+#if defined _WIN32 && !defined __CYGWIN__
+# include <process.h>
+#endif
+
+/* AIX and OSF/1 5.1 declare getdomainname in <netdb.h>, not in <unistd.h>.
+   NonStop Kernel declares gethostname in <netdb.h>, not in <unistd.h>.  */
+/* But avoid namespace pollution on glibc systems.  */
+#if ((@GNULIB_GETDOMAINNAME@ && (defined _AIX || defined __osf__)) \
+     || (@GNULIB_GETHOSTNAME@ && defined __TANDEM)) \
+    && !defined __GLIBC__
+# include <netdb.h>
+#endif
+
+/* Mac OS X 10.13, Solaris 11.4, and Android 9.0 declare getentropy in
+   <sys/random.h>, not in <unistd.h>.  */
+/* But avoid namespace pollution on glibc systems.  */
+#if (@GNULIB_GETENTROPY@ || defined GNULIB_POSIXCHECK) \
+    && ((defined __APPLE__ && defined __MACH__) || defined __sun \
+        || defined __ANDROID__) \
+    && @UNISTD_H_HAVE_SYS_RANDOM_H@ \
+    && !defined __GLIBC__
+# include <sys/random.h>
+#endif
+
+/* Android 4.3 declares fchownat in <sys/stat.h>, not in <unistd.h>.  */
+/* But avoid namespace pollution on glibc systems.  */
+#if (@GNULIB_FCHOWNAT@ || defined GNULIB_POSIXCHECK) && defined __ANDROID__ \
+    && !defined __GLIBC__
+# include <sys/stat.h>
+#endif
+
+/* MSVC defines off_t in <sys/types.h>.
+   May also define off_t to a 64-bit type on native Windows.  */
+/* Get off_t, ssize_t, mode_t.  */
+#include <sys/types.h>
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+
+/* Get getopt(), optarg, optind, opterr, optopt.  */
+#if @GNULIB_GETOPT_POSIX@ && @GNULIB_UNISTD_H_GETOPT@ && !defined _GL_SYSTEM_GETOPT
+# include <getopt-cdefs.h>
+# include <getopt-pfx-core.h>
+#endif
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef _GL_UNISTD_INLINE
+# define _GL_UNISTD_INLINE _GL_INLINE
+#endif
+
+/* Hide some function declarations from <winsock2.h>.  */
+
+#if @GNULIB_GETHOSTNAME@ && @UNISTD_H_HAVE_WINSOCK2_H@
+# if !defined _@GUARD_PREFIX@_SYS_SOCKET_H
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef socket
+#   define socket              socket_used_without_including_sys_socket_h
+#   undef connect
+#   define connect             connect_used_without_including_sys_socket_h
+#   undef accept
+#   define accept              accept_used_without_including_sys_socket_h
+#   undef bind
+#   define bind                bind_used_without_including_sys_socket_h
+#   undef getpeername
+#   define getpeername         getpeername_used_without_including_sys_socket_h
+#   undef getsockname
+#   define getsockname         getsockname_used_without_including_sys_socket_h
+#   undef getsockopt
+#   define getsockopt          getsockopt_used_without_including_sys_socket_h
+#   undef listen
+#   define listen              listen_used_without_including_sys_socket_h
+#   undef recv
+#   define recv                recv_used_without_including_sys_socket_h
+#   undef send
+#   define send                send_used_without_including_sys_socket_h
+#   undef recvfrom
+#   define recvfrom            recvfrom_used_without_including_sys_socket_h
+#   undef sendto
+#   define sendto              sendto_used_without_including_sys_socket_h
+#   undef setsockopt
+#   define setsockopt          setsockopt_used_without_including_sys_socket_h
+#   undef shutdown
+#   define shutdown            shutdown_used_without_including_sys_socket_h
+#  else
+    _GL_WARN_ON_USE (socket,
+                     "socket() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (connect,
+                     "connect() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (accept,
+                     "accept() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (bind,
+                     "bind() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (getpeername,
+                     "getpeername() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (getsockname,
+                     "getsockname() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (getsockopt,
+                     "getsockopt() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (listen,
+                     "listen() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (recv,
+                     "recv() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (send,
+                     "send() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (recvfrom,
+                     "recvfrom() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (sendto,
+                     "sendto() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (setsockopt,
+                     "setsockopt() used without including <sys/socket.h>");
+    _GL_WARN_ON_USE (shutdown,
+                     "shutdown() used without including <sys/socket.h>");
+#  endif
+# endif
+# if !defined _@GUARD_PREFIX@_SYS_SELECT_H
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef select
+#   define select              select_used_without_including_sys_select_h
+#  else
+    _GL_WARN_ON_USE (select,
+                     "select() used without including <sys/select.h>");
+#  endif
+# endif
+#endif
+
+
+/* OS/2 EMX lacks these macros.  */
+#ifndef STDIN_FILENO
+# define STDIN_FILENO 0
+#endif
+#ifndef STDOUT_FILENO
+# define STDOUT_FILENO 1
+#endif
+#ifndef STDERR_FILENO
+# define STDERR_FILENO 2
+#endif
+
+/* Ensure *_OK macros exist.  */
+#ifndef F_OK
+# define F_OK 0
+# define X_OK 1
+# define W_OK 2
+# define R_OK 4
+#endif
+
+
+/* Declare overridden functions.  */
+
+
+#if @GNULIB_ACCESS@
+# if @REPLACE_ACCESS@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef access
+#   define access rpl_access
+#  endif
+_GL_FUNCDECL_RPL (access, int, (const char *file, int mode)
+                               _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (access, int, (const char *file, int mode));
+# elif defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef access
+#   define access _access
+#  endif
+_GL_CXXALIAS_MDA (access, int, (const char *file, int mode));
+# else
+_GL_CXXALIAS_SYS (access, int, (const char *file, int mode));
+# endif
+_GL_CXXALIASWARN (access);
+#elif defined GNULIB_POSIXCHECK
+# undef access
+# if HAVE_RAW_DECL_ACCESS
+/* The access() function is a security risk.  */
+_GL_WARN_ON_USE (access, "access does not always support X_OK - "
+                 "use gnulib module access for portability; "
+                 "also, this function is a security risk - "
+                 "use the gnulib module faccessat instead");
+# endif
+#elif @GNULIB_MDA_ACCESS@
+/* On native Windows, map 'access' to '_access', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::access always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef access
+#   define access _access
+#  endif
+_GL_CXXALIAS_MDA (access, int, (const char *file, int mode));
+# else
+_GL_CXXALIAS_SYS (access, int, (const char *file, int mode));
+# endif
+_GL_CXXALIASWARN (access);
+#endif
+
+
+#if @GNULIB_CHDIR@
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef chdir
+#   define chdir _chdir
+#  endif
+_GL_CXXALIAS_MDA (chdir, int, (const char *file));
+# else
+_GL_CXXALIAS_SYS (chdir, int, (const char *file) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIASWARN (chdir);
+#elif defined GNULIB_POSIXCHECK
+# undef chdir
+# if HAVE_RAW_DECL_CHDIR
+_GL_WARN_ON_USE (chown, "chdir is not always in <unistd.h> - "
+                 "use gnulib module chdir for portability");
+# endif
+#elif @GNULIB_MDA_CHDIR@
+/* On native Windows, map 'chdir' to '_chdir', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::chdir always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef chdir
+#   define chdir _chdir
+#  endif
+_GL_CXXALIAS_MDA (chdir, int, (const char *file));
+# else
+_GL_CXXALIAS_SYS (chdir, int, (const char *file) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIASWARN (chdir);
+#endif
+
+
+#if @GNULIB_CHOWN@
+/* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
+   to GID (if GID is not -1).  Follow symbolic links.
+   Return 0 if successful, otherwise -1 and errno set.
+   See the POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/chown.html.  */
+# if @REPLACE_CHOWN@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef chown
+#   define chown rpl_chown
+#  endif
+_GL_FUNCDECL_RPL (chown, int, (const char *file, uid_t uid, gid_t gid)
+                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (chown, int, (const char *file, uid_t uid, gid_t gid));
+# else
+#  if !@HAVE_CHOWN@
+_GL_FUNCDECL_SYS (chown, int, (const char *file, uid_t uid, gid_t gid)
+                              _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (chown, int, (const char *file, uid_t uid, gid_t gid));
+# endif
+_GL_CXXALIASWARN (chown);
+#elif defined GNULIB_POSIXCHECK
+# undef chown
+# if HAVE_RAW_DECL_CHOWN
+_GL_WARN_ON_USE (chown, "chown fails to follow symlinks on some systems and "
+                 "doesn't treat a uid or gid of -1 on some systems - "
+                 "use gnulib module chown for portability");
+# endif
+#endif
+
+
+#if @GNULIB_CLOSE@
+# if @REPLACE_CLOSE@
+/* Automatically included by modules that need a replacement for close.  */
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef close
+#   define close rpl_close
+#  endif
+_GL_FUNCDECL_RPL (close, int, (int fd));
+_GL_CXXALIAS_RPL (close, int, (int fd));
+# elif defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef close
+#   define close _close
+#  endif
+_GL_CXXALIAS_MDA (close, int, (int fd));
+# else
+_GL_CXXALIAS_SYS (close, int, (int fd));
+# endif
+_GL_CXXALIASWARN (close);
+#elif @UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
+# undef close
+# define close close_used_without_requesting_gnulib_module_close
+#elif defined GNULIB_POSIXCHECK
+# undef close
+/* Assume close is always declared.  */
+_GL_WARN_ON_USE (close, "close does not portably work on sockets - "
+                 "use gnulib module close for portability");
+#elif @GNULIB_MDA_CLOSE@
+/* On native Windows, map 'close' to '_close', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::close always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef close
+#   define close _close
+#  endif
+_GL_CXXALIAS_MDA (close, int, (int fd));
+# else
+_GL_CXXALIAS_SYS (close, int, (int fd));
+# endif
+_GL_CXXALIASWARN (close);
+#endif
+
+
+#if @GNULIB_COPY_FILE_RANGE@
+# if !@HAVE_COPY_FILE_RANGE@
+_GL_FUNCDECL_SYS (copy_file_range, ssize_t, (int ifd, off_t *ipos,
+                                             int ofd, off_t *opos,
+                                             size_t len, unsigned flags));
+_GL_CXXALIAS_SYS (copy_file_range, ssize_t, (int ifd, off_t *ipos,
+                                             int ofd, off_t *opos,
+                                             size_t len, unsigned flags));
+# endif
+_GL_CXXALIASWARN (copy_file_range);
+#elif defined GNULIB_POSIXCHECK
+# if HAVE_RAW_DECL_COPY_FILE_RANGE
+_GL_WARN_ON_USE (copy_file_range,
+                 "copy_file_range is unportable - "
+                 "use gnulib module copy_file_range for portability");
+# endif
+#endif
+
+
+#if @GNULIB_DUP@
+# if @REPLACE_DUP@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define dup rpl_dup
+#  endif
+_GL_FUNCDECL_RPL (dup, int, (int oldfd));
+_GL_CXXALIAS_RPL (dup, int, (int oldfd));
+# elif defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef dup
+#   define dup _dup
+#  endif
+_GL_CXXALIAS_MDA (dup, int, (int oldfd));
+# else
+_GL_CXXALIAS_SYS (dup, int, (int oldfd));
+# endif
+_GL_CXXALIASWARN (dup);
+#elif defined GNULIB_POSIXCHECK
+# undef dup
+# if HAVE_RAW_DECL_DUP
+_GL_WARN_ON_USE (dup, "dup is unportable - "
+                 "use gnulib module dup for portability");
+# endif
+#elif @GNULIB_MDA_DUP@
+/* On native Windows, map 'dup' to '_dup', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::dup always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef dup
+#   define dup _dup
+#  endif
+_GL_CXXALIAS_MDA (dup, int, (int oldfd));
+# else
+_GL_CXXALIAS_SYS (dup, int, (int oldfd));
+# endif
+_GL_CXXALIASWARN (dup);
+#endif
+
+
+#if @GNULIB_DUP2@
+/* Copy the file descriptor OLDFD into file descriptor NEWFD.  Do nothing if
+   NEWFD = OLDFD, otherwise close NEWFD first if it is open.
+   Return newfd if successful, otherwise -1 and errno set.
+   See the POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/dup2.html>.  */
+# if @REPLACE_DUP2@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define dup2 rpl_dup2
+#  endif
+_GL_FUNCDECL_RPL (dup2, int, (int oldfd, int newfd));
+_GL_CXXALIAS_RPL (dup2, int, (int oldfd, int newfd));
+# elif defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef dup2
+#   define dup2 _dup2
+#  endif
+_GL_CXXALIAS_MDA (dup2, int, (int oldfd, int newfd));
+# else
+_GL_CXXALIAS_SYS (dup2, int, (int oldfd, int newfd));
+# endif
+_GL_CXXALIASWARN (dup2);
+#elif defined GNULIB_POSIXCHECK
+# undef dup2
+# if HAVE_RAW_DECL_DUP2
+_GL_WARN_ON_USE (dup2, "dup2 is unportable - "
+                 "use gnulib module dup2 for portability");
+# endif
+#elif @GNULIB_MDA_DUP2@
+/* On native Windows, map 'dup2' to '_dup2', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::dup2 always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef dup2
+#   define dup2 _dup2
+#  endif
+_GL_CXXALIAS_MDA (dup2, int, (int oldfd, int newfd));
+# else
+_GL_CXXALIAS_SYS (dup2, int, (int oldfd, int newfd));
+# endif
+_GL_CXXALIASWARN (dup2);
+#endif
+
+
+#if @GNULIB_DUP3@
+/* Copy the file descriptor OLDFD into file descriptor NEWFD, with the
+   specified flags.
+   The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
+   and O_TEXT, O_BINARY (defined in "binary-io.h").
+   Close NEWFD first if it is open.
+   Return newfd if successful, otherwise -1 and errno set.
+   See the Linux man page at
+   <https://www.kernel.org/doc/man-pages/online/pages/man2/dup3.2.html>.  */
+# if @HAVE_DUP3@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define dup3 rpl_dup3
+#  endif
+_GL_FUNCDECL_RPL (dup3, int, (int oldfd, int newfd, int flags));
+_GL_CXXALIAS_RPL (dup3, int, (int oldfd, int newfd, int flags));
+# else
+_GL_FUNCDECL_SYS (dup3, int, (int oldfd, int newfd, int flags));
+_GL_CXXALIAS_SYS (dup3, int, (int oldfd, int newfd, int flags));
+# endif
+_GL_CXXALIASWARN (dup3);
+#elif defined GNULIB_POSIXCHECK
+# undef dup3
+# if HAVE_RAW_DECL_DUP3
+_GL_WARN_ON_USE (dup3, "dup3 is unportable - "
+                 "use gnulib module dup3 for portability");
+# endif
+#endif
+
+
+#if @GNULIB_ENVIRON@
+# if defined __CYGWIN__ && !defined __i386__
+/* The 'environ' variable is defined in a DLL. Therefore its declaration needs
+   the '__declspec(dllimport)' attribute, but the system's <unistd.h> lacks it.
+   This leads to a link error on 64-bit Cygwin when the option
+   -Wl,--disable-auto-import is in use.  */
+_GL_EXTERN_C __declspec(dllimport) char **environ;
+# endif
+# if !@HAVE_DECL_ENVIRON@
+/* Set of environment variables and values.  An array of strings of the form
+   "VARIABLE=VALUE", terminated with a NULL.  */
+#  if defined __APPLE__ && defined __MACH__
+#   include <TargetConditionals.h>
+#   if !TARGET_OS_IPHONE && !TARGET_IPHONE_SIMULATOR
+#    define _GL_USE_CRT_EXTERNS
+#   endif
+#  endif
+#  ifdef _GL_USE_CRT_EXTERNS
+#   include <crt_externs.h>
+#   define environ (*_NSGetEnviron ())
+#  else
+#   ifdef __cplusplus
+extern "C" {
+#   endif
+extern char **environ;
+#   ifdef __cplusplus
+}
+#   endif
+#  endif
+# endif
+#elif defined GNULIB_POSIXCHECK
+# if HAVE_RAW_DECL_ENVIRON
+_GL_UNISTD_INLINE char ***
+_GL_WARN_ON_USE_ATTRIBUTE ("environ is unportable - "
+                           "use gnulib module environ for portability")
+rpl_environ (void)
+{
+  return &environ;
+}
+#  undef environ
+#  define environ (*rpl_environ ())
+# endif
+#endif
+
+
+#if @GNULIB_EUIDACCESS@
+/* Like access(), except that it uses the effective user id and group id of
+   the current process.  */
+# if !@HAVE_EUIDACCESS@
+_GL_FUNCDECL_SYS (euidaccess, int, (const char *filename, int mode)
+                                   _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (euidaccess, int, (const char *filename, int mode));
+_GL_CXXALIASWARN (euidaccess);
+# if defined GNULIB_POSIXCHECK
+/* Like access(), this function is a security risk.  */
+_GL_WARN_ON_USE (euidaccess, "the euidaccess function is a security risk - "
+                 "use the gnulib module faccessat instead");
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef euidaccess
+# if HAVE_RAW_DECL_EUIDACCESS
+_GL_WARN_ON_USE (euidaccess, "euidaccess is unportable - "
+                 "use gnulib module euidaccess for portability");
+# endif
+#endif
+
+
+#if @GNULIB_EXECL@
+# if @REPLACE_EXECL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execl
+#   define execl rpl_execl
+#  endif
+_GL_FUNCDECL_RPL (execl, int, (const char *program, const char *arg, ...)
+                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (execl, int, (const char *program, const char *arg, ...));
+# else
+_GL_CXXALIAS_SYS (execl, int, (const char *program, const char *arg, ...));
+# endif
+_GL_CXXALIASWARN (execl);
+#elif defined GNULIB_POSIXCHECK
+# undef execl
+# if HAVE_RAW_DECL_EXECL
+_GL_WARN_ON_USE (execl, "execl behaves very differently on mingw - "
+                 "use gnulib module execl for portability");
+# endif
+#elif @GNULIB_MDA_EXECL@
+/* On native Windows, map 'execl' to '_execl', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::execl always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execl
+#   define execl _execl
+#  endif
+_GL_CXXALIAS_MDA (execl, intptr_t, (const char *program, const char *arg, ...));
+# else
+_GL_CXXALIAS_SYS (execl, int, (const char *program, const char *arg, ...));
+# endif
+_GL_CXXALIASWARN (execl);
+#endif
+
+#if @GNULIB_EXECLE@
+# if @REPLACE_EXECLE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execle
+#   define execle rpl_execle
+#  endif
+_GL_FUNCDECL_RPL (execle, int, (const char *program, const char *arg, ...)
+                               _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (execle, int, (const char *program, const char *arg, ...));
+# else
+_GL_CXXALIAS_SYS (execle, int, (const char *program, const char *arg, ...));
+# endif
+_GL_CXXALIASWARN (execle);
+#elif defined GNULIB_POSIXCHECK
+# undef execle
+# if HAVE_RAW_DECL_EXECLE
+_GL_WARN_ON_USE (execle, "execle behaves very differently on mingw - "
+                 "use gnulib module execle for portability");
+# endif
+#elif @GNULIB_MDA_EXECLE@
+/* On native Windows, map 'execle' to '_execle', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::execle always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execle
+#   define execle _execle
+#  endif
+_GL_CXXALIAS_MDA (execle, intptr_t,
+                  (const char *program, const char *arg, ...));
+# else
+_GL_CXXALIAS_SYS (execle, int, (const char *program, const char *arg, ...));
+# endif
+_GL_CXXALIASWARN (execle);
+#endif
+
+#if @GNULIB_EXECLP@
+# if @REPLACE_EXECLP@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execlp
+#   define execlp rpl_execlp
+#  endif
+_GL_FUNCDECL_RPL (execlp, int, (const char *program, const char *arg, ...)
+                               _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (execlp, int, (const char *program, const char *arg, ...));
+# else
+_GL_CXXALIAS_SYS (execlp, int, (const char *program, const char *arg, ...));
+# endif
+_GL_CXXALIASWARN (execlp);
+#elif defined GNULIB_POSIXCHECK
+# undef execlp
+# if HAVE_RAW_DECL_EXECLP
+_GL_WARN_ON_USE (execlp, "execlp behaves very differently on mingw - "
+                 "use gnulib module execlp for portability");
+# endif
+#elif @GNULIB_MDA_EXECLP@
+/* On native Windows, map 'execlp' to '_execlp', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::execlp always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execlp
+#   define execlp _execlp
+#  endif
+_GL_CXXALIAS_MDA (execlp, intptr_t,
+                  (const char *program, const char *arg, ...));
+# else
+_GL_CXXALIAS_SYS (execlp, int, (const char *program, const char *arg, ...));
+# endif
+_GL_CXXALIASWARN (execlp);
+#endif
+
+
+#if @GNULIB_EXECV@
+# if @REPLACE_EXECV@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execv
+#   define execv rpl_execv
+#  endif
+_GL_FUNCDECL_RPL (execv, int, (const char *program, char * const *argv)
+                              _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (execv, int, (const char *program, char * const *argv));
+# else
+_GL_CXXALIAS_SYS (execv, int, (const char *program, char * const *argv));
+# endif
+_GL_CXXALIASWARN (execv);
+#elif defined GNULIB_POSIXCHECK
+# undef execv
+# if HAVE_RAW_DECL_EXECV
+_GL_WARN_ON_USE (execv, "execv behaves very differently on mingw - "
+                 "use gnulib module execv for portability");
+# endif
+#elif @GNULIB_MDA_EXECV@
+/* On native Windows, map 'execv' to '_execv', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::execv always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execv
+#   define execv _execv
+#  endif
+_GL_CXXALIAS_MDA_CAST (execv, intptr_t,
+                       (const char *program, char * const *argv));
+# else
+_GL_CXXALIAS_SYS (execv, int, (const char *program, char * const *argv));
+# endif
+_GL_CXXALIASWARN (execv);
+#endif
+
+#if @GNULIB_EXECVE@
+# if @REPLACE_EXECVE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execve
+#   define execve rpl_execve
+#  endif
+_GL_FUNCDECL_RPL (execve, int,
+                  (const char *program, char * const *argv, char * const *env)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (execve, int,
+                  (const char *program, char * const *argv, char * const *env));
+# else
+_GL_CXXALIAS_SYS (execve, int,
+                  (const char *program, char * const *argv, char * const *env));
+# endif
+_GL_CXXALIASWARN (execve);
+#elif defined GNULIB_POSIXCHECK
+# undef execve
+# if HAVE_RAW_DECL_EXECVE
+_GL_WARN_ON_USE (execve, "execve behaves very differently on mingw - "
+                 "use gnulib module execve for portability");
+# endif
+#elif @GNULIB_MDA_EXECVE@
+/* On native Windows, map 'execve' to '_execve', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::execve always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execve
+#   define execve _execve
+#  endif
+_GL_CXXALIAS_MDA_CAST (execve, intptr_t,
+                       (const char *program, char * const *argv,
+                        char * const *env));
+# else
+_GL_CXXALIAS_SYS (execve, int,
+                  (const char *program, char * const *argv, char * const *env));
+# endif
+_GL_CXXALIASWARN (execve);
+#endif
+
+#if @GNULIB_EXECVP@
+# if @REPLACE_EXECVP@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execvp
+#   define execvp rpl_execvp
+#  endif
+_GL_FUNCDECL_RPL (execvp, int, (const char *program, char * const *argv)
+                               _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (execvp, int, (const char *program, char * const *argv));
+# else
+_GL_CXXALIAS_SYS (execvp, int, (const char *program, char * const *argv));
+# endif
+_GL_CXXALIASWARN (execvp);
+#elif defined GNULIB_POSIXCHECK
+# undef execvp
+# if HAVE_RAW_DECL_EXECVP
+_GL_WARN_ON_USE (execvp, "execvp behaves very differently on mingw - "
+                 "use gnulib module execvp for portability");
+# endif
+#elif @GNULIB_MDA_EXECVP@
+/* On native Windows, map 'execvp' to '_execvp', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::execvp always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execvp
+#   define execvp _execvp
+#  endif
+_GL_CXXALIAS_MDA_CAST (execvp, intptr_t,
+                       (const char *program, char * const *argv));
+# else
+_GL_CXXALIAS_SYS (execvp, int, (const char *program, char * const *argv));
+# endif
+_GL_CXXALIASWARN (execvp);
+#endif
+
+#if @GNULIB_EXECVPE@
+# if @REPLACE_EXECVPE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execvpe
+#   define execvpe rpl_execvpe
+#  endif
+_GL_FUNCDECL_RPL (execvpe, int,
+                  (const char *program, char * const *argv, char * const *env)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (execvpe, int,
+                  (const char *program, char * const *argv, char * const *env));
+# else
+#  if !@HAVE_DECL_EXECVPE@
+_GL_FUNCDECL_SYS (execvpe, int,
+                  (const char *program, char * const *argv, char * const *env)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (execvpe, int,
+                  (const char *program, char * const *argv, char * const *env));
+# endif
+_GL_CXXALIASWARN (execvpe);
+#elif defined GNULIB_POSIXCHECK
+# undef execvpe
+# if HAVE_RAW_DECL_EXECVPE
+_GL_WARN_ON_USE (execvpe, "execvpe behaves very differently on mingw - "
+                 "use gnulib module execvpe for portability");
+# endif
+#elif @GNULIB_MDA_EXECVPE@
+/* On native Windows, map 'execvpe' to '_execvpe', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::execvpe on all platforms that have
+   it.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execvpe
+#   define execvpe _execvpe
+#  endif
+_GL_CXXALIAS_MDA_CAST (execvpe, intptr_t,
+                       (const char *program, char * const *argv,
+                        char * const *env));
+# elif @HAVE_EXECVPE@
+#  if !@HAVE_DECL_EXECVPE@
+_GL_FUNCDECL_SYS (execvpe, int,
+                  (const char *program, char * const *argv, char * const *env)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (execvpe, int,
+                  (const char *program, char * const *argv, char * const *env));
+# endif
+# if (defined _WIN32 && !defined __CYGWIN__) || @HAVE_EXECVPE@
+_GL_CXXALIASWARN (execvpe);
+# endif
+#endif
+
+
+#if @GNULIB_FACCESSAT@
+# if @REPLACE_FACCESSAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef faccessat
+#   define faccessat rpl_faccessat
+#  endif
+_GL_FUNCDECL_RPL (faccessat, int,
+                  (int fd, char const *name, int mode, int flag)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (faccessat, int,
+                  (int fd, char const *name, int mode, int flag));
+# else
+#  if !@HAVE_FACCESSAT@
+_GL_FUNCDECL_SYS (faccessat, int,
+                  (int fd, char const *file, int mode, int flag)
+                  _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (faccessat, int,
+                  (int fd, char const *file, int mode, int flag));
+# endif
+_GL_CXXALIASWARN (faccessat);
+#elif defined GNULIB_POSIXCHECK
+# undef faccessat
+# if HAVE_RAW_DECL_FACCESSAT
+_GL_WARN_ON_USE (faccessat, "faccessat is not portable - "
+                 "use gnulib module faccessat for portability");
+# endif
+#endif
+
+
+#if @GNULIB_FCHDIR@
+/* Change the process' current working directory to the directory on which
+   the given file descriptor is open.
+   Return 0 if successful, otherwise -1 and errno set.
+   See the POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/fchdir.html>.  */
+# if ! @HAVE_FCHDIR@
+_GL_FUNCDECL_SYS (fchdir, int, (int /*fd*/));
+
+/* Gnulib internal hooks needed to maintain the fchdir metadata.  */
+_GL_EXTERN_C int _gl_register_fd (int fd, const char *filename)
+     _GL_ARG_NONNULL ((2));
+_GL_EXTERN_C void _gl_unregister_fd (int fd);
+_GL_EXTERN_C int _gl_register_dup (int oldfd, int newfd);
+_GL_EXTERN_C const char *_gl_directory_name (int fd);
+
+# else
+#  if !@HAVE_DECL_FCHDIR@
+_GL_FUNCDECL_SYS (fchdir, int, (int /*fd*/));
+#  endif
+# endif
+_GL_CXXALIAS_SYS (fchdir, int, (int /*fd*/));
+_GL_CXXALIASWARN (fchdir);
+#elif defined GNULIB_POSIXCHECK
+# undef fchdir
+# if HAVE_RAW_DECL_FCHDIR
+_GL_WARN_ON_USE (fchdir, "fchdir is unportable - "
+                 "use gnulib module fchdir for portability");
+# endif
+#endif
+
+
+#if @GNULIB_FCHOWNAT@
+# if @REPLACE_FCHOWNAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fchownat
+#   define fchownat rpl_fchownat
+#  endif
+_GL_FUNCDECL_RPL (fchownat, int, (int fd, char const *file,
+                                  uid_t owner, gid_t group, int flag)
+                                 _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (fchownat, int, (int fd, char const *file,
+                                  uid_t owner, gid_t group, int flag));
+# else
+#  if !@HAVE_FCHOWNAT@
+_GL_FUNCDECL_SYS (fchownat, int, (int fd, char const *file,
+                                  uid_t owner, gid_t group, int flag)
+                                 _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (fchownat, int, (int fd, char const *file,
+                                  uid_t owner, gid_t group, int flag));
+# endif
+_GL_CXXALIASWARN (fchownat);
+#elif defined GNULIB_POSIXCHECK
+# undef fchownat
+# if HAVE_RAW_DECL_FCHOWNAT
+_GL_WARN_ON_USE (fchownat, "fchownat is not portable - "
+                 "use gnulib module fchownat for portability");
+# endif
+#endif
+
+
+#if @GNULIB_FDATASYNC@
+/* Synchronize changes to a file.
+   Return 0 if successful, otherwise -1 and errno set.
+   See POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/fdatasync.html>.  */
+# if !@HAVE_FDATASYNC@ || !@HAVE_DECL_FDATASYNC@
+_GL_FUNCDECL_SYS (fdatasync, int, (int fd));
+# endif
+_GL_CXXALIAS_SYS (fdatasync, int, (int fd));
+_GL_CXXALIASWARN (fdatasync);
+#elif defined GNULIB_POSIXCHECK
+# undef fdatasync
+# if HAVE_RAW_DECL_FDATASYNC
+_GL_WARN_ON_USE (fdatasync, "fdatasync is unportable - "
+                 "use gnulib module fdatasync for portability");
+# endif
+#endif
+
+
+#if @GNULIB_FSYNC@
+/* Synchronize changes, including metadata, to a file.
+   Return 0 if successful, otherwise -1 and errno set.
+   See POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/fsync.html>.  */
+# if !@HAVE_FSYNC@
+_GL_FUNCDECL_SYS (fsync, int, (int fd));
+# endif
+_GL_CXXALIAS_SYS (fsync, int, (int fd));
+_GL_CXXALIASWARN (fsync);
+#elif defined GNULIB_POSIXCHECK
+# undef fsync
+# if HAVE_RAW_DECL_FSYNC
+_GL_WARN_ON_USE (fsync, "fsync is unportable - "
+                 "use gnulib module fsync for portability");
+# endif
+#endif
+
+
+#if @GNULIB_FTRUNCATE@
+/* Change the size of the file to which FD is opened to become equal to LENGTH.
+   Return 0 if successful, otherwise -1 and errno set.
+   See the POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/ftruncate.html>.  */
+# if @REPLACE_FTRUNCATE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef ftruncate
+#   define ftruncate rpl_ftruncate
+#  endif
+_GL_FUNCDECL_RPL (ftruncate, int, (int fd, off_t length));
+_GL_CXXALIAS_RPL (ftruncate, int, (int fd, off_t length));
+# else
+#  if !@HAVE_FTRUNCATE@
+_GL_FUNCDECL_SYS (ftruncate, int, (int fd, off_t length));
+#  endif
+_GL_CXXALIAS_SYS (ftruncate, int, (int fd, off_t length));
+# endif
+_GL_CXXALIASWARN (ftruncate);
+#elif defined GNULIB_POSIXCHECK
+# undef ftruncate
+# if HAVE_RAW_DECL_FTRUNCATE
+_GL_WARN_ON_USE (ftruncate, "ftruncate is unportable - "
+                 "use gnulib module ftruncate for portability");
+# endif
+#endif
+
+
+#if @GNULIB_GETCWD@
+/* Get the name of the current working directory, and put it in SIZE bytes
+   of BUF.
+   Return BUF if successful, or NULL if the directory couldn't be determined
+   or SIZE was too small.
+   See the POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/getcwd.html>.
+   Additionally, the gnulib module 'getcwd' guarantees the following GNU
+   extension: If BUF is NULL, an array is allocated with 'malloc'; the array
+   is SIZE bytes long, unless SIZE == 0, in which case it is as big as
+   necessary.  */
+# if @REPLACE_GETCWD@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define getcwd rpl_getcwd
+#  endif
+_GL_FUNCDECL_RPL (getcwd, char *, (char *buf, size_t size));
+_GL_CXXALIAS_RPL (getcwd, char *, (char *buf, size_t size));
+# elif defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef getcwd
+#   define getcwd _getcwd
+#  endif
+_GL_CXXALIAS_MDA (getcwd, char *, (char *buf, size_t size));
+# else
+/* Need to cast, because on mingw, the second parameter is
+                                                   int size.  */
+_GL_CXXALIAS_SYS_CAST (getcwd, char *, (char *buf, size_t size));
+# endif
+_GL_CXXALIASWARN (getcwd);
+#elif defined GNULIB_POSIXCHECK
+# undef getcwd
+# if HAVE_RAW_DECL_GETCWD
+_GL_WARN_ON_USE (getcwd, "getcwd is unportable - "
+                 "use gnulib module getcwd for portability");
+# endif
+#elif @GNULIB_MDA_GETCWD@
+/* On native Windows, map 'getcwd' to '_getcwd', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::getcwd always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef getcwd
+#   define getcwd _getcwd
+#  endif
+/* Need to cast, because on mingw, the second parameter is either
+   'int size' or 'size_t size'.  */
+_GL_CXXALIAS_MDA_CAST (getcwd, char *, (char *buf, size_t size));
+# else
+_GL_CXXALIAS_SYS_CAST (getcwd, char *, (char *buf, size_t size));
+# endif
+_GL_CXXALIASWARN (getcwd);
+#endif
+
+
+#if @GNULIB_GETDOMAINNAME@
+/* Return the NIS domain name of the machine.
+   WARNING! The NIS domain name is unrelated to the fully qualified host name
+            of the machine.  It is also unrelated to email addresses.
+   WARNING! The NIS domain name is usually the empty string or "(none)" when
+            not using NIS.
+
+   Put up to LEN bytes of the NIS domain name into NAME.
+   Null terminate it if the name is shorter than LEN.
+   If the NIS domain name is longer than LEN, set errno = EINVAL and return -1.
+   Return 0 if successful, otherwise set errno and return -1.  */
+# if @REPLACE_GETDOMAINNAME@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef getdomainname
+#   define getdomainname rpl_getdomainname
+#  endif
+_GL_FUNCDECL_RPL (getdomainname, int, (char *name, size_t len)
+                                      _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (getdomainname, int, (char *name, size_t len));
+# else
+#  if !@HAVE_DECL_GETDOMAINNAME@
+_GL_FUNCDECL_SYS (getdomainname, int, (char *name, size_t len)
+                                      _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (getdomainname, int, (char *name, size_t len));
+# endif
+_GL_CXXALIASWARN (getdomainname);
+#elif defined GNULIB_POSIXCHECK
+# undef getdomainname
+# if HAVE_RAW_DECL_GETDOMAINNAME
+_GL_WARN_ON_USE (getdomainname, "getdomainname is unportable - "
+                 "use gnulib module getdomainname for portability");
+# endif
+#endif
+
+
+#if @GNULIB_GETDTABLESIZE@
+/* Return the maximum number of file descriptors in the current process.
+   In POSIX, this is same as sysconf (_SC_OPEN_MAX).  */
+# if @REPLACE_GETDTABLESIZE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef getdtablesize
+#   define getdtablesize rpl_getdtablesize
+#  endif
+_GL_FUNCDECL_RPL (getdtablesize, int, (void));
+_GL_CXXALIAS_RPL (getdtablesize, int, (void));
+# else
+#  if !@HAVE_GETDTABLESIZE@
+_GL_FUNCDECL_SYS (getdtablesize, int, (void));
+#  endif
+/* Need to cast, because on AIX, the parameter list is
+                                           (...).  */
+_GL_CXXALIAS_SYS_CAST (getdtablesize, int, (void));
+# endif
+_GL_CXXALIASWARN (getdtablesize);
+#elif defined GNULIB_POSIXCHECK
+# undef getdtablesize
+# if HAVE_RAW_DECL_GETDTABLESIZE
+_GL_WARN_ON_USE (getdtablesize, "getdtablesize is unportable - "
+                 "use gnulib module getdtablesize for portability");
+# endif
+#endif
+
+
+#if @GNULIB_GETENTROPY@
+/* Fill a buffer with random bytes.  */
+# if !@HAVE_GETENTROPY@
+_GL_FUNCDECL_SYS (getentropy, int, (void *buffer, size_t length));
+# endif
+_GL_CXXALIAS_SYS (getentropy, int, (void *buffer, size_t length));
+_GL_CXXALIASWARN (getentropy);
+#elif defined GNULIB_POSIXCHECK
+# undef getentropy
+# if HAVE_RAW_DECL_GETENTROPY
+_GL_WARN_ON_USE (getentropy, "getentropy is unportable - "
+                 "use gnulib module getentropy for portability");
+# endif
+#endif
+
+
+#if @GNULIB_GETGROUPS@
+/* Return the supplemental groups that the current process belongs to.
+   It is unspecified whether the effective group id is in the list.
+   If N is 0, return the group count; otherwise, N describes how many
+   entries are available in GROUPS.  Return -1 and set errno if N is
+   not 0 and not large enough.  Fails with ENOSYS on some systems.  */
+# if @REPLACE_GETGROUPS@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef getgroups
+#   define getgroups rpl_getgroups
+#  endif
+_GL_FUNCDECL_RPL (getgroups, int, (int n, gid_t *groups));
+_GL_CXXALIAS_RPL (getgroups, int, (int n, gid_t *groups));
+# else
+#  if !@HAVE_GETGROUPS@
+_GL_FUNCDECL_SYS (getgroups, int, (int n, gid_t *groups));
+#  endif
+_GL_CXXALIAS_SYS (getgroups, int, (int n, gid_t *groups));
+# endif
+_GL_CXXALIASWARN (getgroups);
+#elif defined GNULIB_POSIXCHECK
+# undef getgroups
+# if HAVE_RAW_DECL_GETGROUPS
+_GL_WARN_ON_USE (getgroups, "getgroups is unportable - "
+                 "use gnulib module getgroups for portability");
+# endif
+#endif
+
+
+#if @GNULIB_GETHOSTNAME@
+/* Return the standard host name of the machine.
+   WARNING! The host name may or may not be fully qualified.
+
+   Put up to LEN bytes of the host name into NAME.
+   Null terminate it if the name is shorter than LEN.
+   If the host name is longer than LEN, set errno = EINVAL and return -1.
+   Return 0 if successful, otherwise set errno and return -1.  */
+# if @UNISTD_H_HAVE_WINSOCK2_H@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef gethostname
+#   define gethostname rpl_gethostname
+#  endif
+_GL_FUNCDECL_RPL (gethostname, int, (char *name, size_t len)
+                                    _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (gethostname, int, (char *name, size_t len));
+# else
+#  if !@HAVE_GETHOSTNAME@
+_GL_FUNCDECL_SYS (gethostname, int, (char *name, size_t len)
+                                    _GL_ARG_NONNULL ((1)));
+#  endif
+/* Need to cast, because on Solaris 10 and OSF/1 5.1 systems, the second
+   parameter is
+                                                      int len.  */
+_GL_CXXALIAS_SYS_CAST (gethostname, int, (char *name, size_t len));
+# endif
+_GL_CXXALIASWARN (gethostname);
+#elif @UNISTD_H_HAVE_WINSOCK2_H@
+# undef gethostname
+# define gethostname gethostname_used_without_requesting_gnulib_module_gethostname
+#elif defined GNULIB_POSIXCHECK
+# undef gethostname
+# if HAVE_RAW_DECL_GETHOSTNAME
+_GL_WARN_ON_USE (gethostname, "gethostname is unportable - "
+                 "use gnulib module gethostname for portability");
+# endif
+#endif
+
+
+#if @GNULIB_GETLOGIN@
+/* Returns the user's login name, or NULL if it cannot be found.  Upon error,
+   returns NULL with errno set.
+
+   See <https://pubs.opengroup.org/onlinepubs/9699919799/functions/getlogin.html>.
+
+   Most programs don't need to use this function, because the information is
+   available through environment variables:
+     ${LOGNAME-$USER}        on Unix platforms,
+     $USERNAME               on native Windows platforms.
+ */
+# if !@HAVE_DECL_GETLOGIN@
+_GL_FUNCDECL_SYS (getlogin, char *, (void));
+# endif
+_GL_CXXALIAS_SYS (getlogin, char *, (void));
+_GL_CXXALIASWARN (getlogin);
+#elif defined GNULIB_POSIXCHECK
+# undef getlogin
+# if HAVE_RAW_DECL_GETLOGIN
+_GL_WARN_ON_USE (getlogin, "getlogin is unportable - "
+                 "use gnulib module getlogin for portability");
+# endif
+#endif
+
+
+#if @GNULIB_GETLOGIN_R@
+/* Copies the user's login name to NAME.
+   The array pointed to by NAME has room for SIZE bytes.
+
+   Returns 0 if successful.  Upon error, an error number is returned, or -1 in
+   the case that the login name cannot be found but no specific error is
+   provided (this case is hopefully rare but is left open by the POSIX spec).
+
+   See <https://pubs.opengroup.org/onlinepubs/9699919799/functions/getlogin.html>.
+
+   Most programs don't need to use this function, because the information is
+   available through environment variables:
+     ${LOGNAME-$USER}        on Unix platforms,
+     $USERNAME               on native Windows platforms.
+ */
+# if @REPLACE_GETLOGIN_R@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define getlogin_r rpl_getlogin_r
+#  endif
+_GL_FUNCDECL_RPL (getlogin_r, int, (char *name, size_t size)
+                                   _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (getlogin_r, int, (char *name, size_t size));
+# else
+#  if !@HAVE_DECL_GETLOGIN_R@
+_GL_FUNCDECL_SYS (getlogin_r, int, (char *name, size_t size)
+                                   _GL_ARG_NONNULL ((1)));
+#  endif
+/* Need to cast, because on Solaris 10 systems, the second argument is
+                                                     int size.  */
+_GL_CXXALIAS_SYS_CAST (getlogin_r, int, (char *name, size_t size));
+# endif
+_GL_CXXALIASWARN (getlogin_r);
+#elif defined GNULIB_POSIXCHECK
+# undef getlogin_r
+# if HAVE_RAW_DECL_GETLOGIN_R
+_GL_WARN_ON_USE (getlogin_r, "getlogin_r is unportable - "
+                 "use gnulib module getlogin_r for portability");
+# endif
+#endif
+
+
+#if @GNULIB_GETPAGESIZE@
+# if @REPLACE_GETPAGESIZE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define getpagesize rpl_getpagesize
+#  endif
+_GL_FUNCDECL_RPL (getpagesize, int, (void));
+_GL_CXXALIAS_RPL (getpagesize, int, (void));
+# else
+/* On HP-UX, getpagesize exists, but it is not declared in <unistd.h> even if
+   the compiler options -D_HPUX_SOURCE -D_XOPEN_SOURCE=600 are used.  */
+#  if defined __hpux
+_GL_FUNCDECL_SYS (getpagesize, int, (void));
+#  endif
+#  if !@HAVE_GETPAGESIZE@
+#   if !defined getpagesize
+/* This is for POSIX systems.  */
+#    if !defined _gl_getpagesize && defined _SC_PAGESIZE
+#     if ! (defined __VMS && __VMS_VER < 70000000)
+#      define _gl_getpagesize() sysconf (_SC_PAGESIZE)
+#     endif
+#    endif
+/* This is for older VMS.  */
+#    if !defined _gl_getpagesize && defined __VMS
+#     ifdef __ALPHA
+#      define _gl_getpagesize() 8192
+#     else
+#      define _gl_getpagesize() 512
+#     endif
+#    endif
+/* This is for BeOS.  */
+#    if !defined _gl_getpagesize && @HAVE_OS_H@
+#     include <OS.h>
+#     if defined B_PAGE_SIZE
+#      define _gl_getpagesize() B_PAGE_SIZE
+#     endif
+#    endif
+/* This is for AmigaOS4.0.  */
+#    if !defined _gl_getpagesize && defined __amigaos4__
+#     define _gl_getpagesize() 2048
+#    endif
+/* This is for older Unix systems.  */
+#    if !defined _gl_getpagesize && @HAVE_SYS_PARAM_H@
+#     include <sys/param.h>
+#     ifdef EXEC_PAGESIZE
+#      define _gl_getpagesize() EXEC_PAGESIZE
+#     else
+#      ifdef NBPG
+#       ifndef CLSIZE
+#        define CLSIZE 1
+#       endif
+#       define _gl_getpagesize() (NBPG * CLSIZE)
+#      else
+#       ifdef NBPC
+#        define _gl_getpagesize() NBPC
+#       endif
+#      endif
+#     endif
+#    endif
+#    if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#     define getpagesize() _gl_getpagesize ()
+#    else
+#     if !GNULIB_defined_getpagesize_function
+_GL_UNISTD_INLINE int
+getpagesize ()
+{
+  return _gl_getpagesize ();
+}
+#      define GNULIB_defined_getpagesize_function 1
+#     endif
+#    endif
+#   endif
+#  endif
+/* Need to cast, because on Cygwin 1.5.x systems, the return type is size_t.  */
+_GL_CXXALIAS_SYS_CAST (getpagesize, int, (void));
+# endif
+# if @HAVE_DECL_GETPAGESIZE@
+_GL_CXXALIASWARN (getpagesize);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef getpagesize
+# if HAVE_RAW_DECL_GETPAGESIZE
+_GL_WARN_ON_USE (getpagesize, "getpagesize is unportable - "
+                 "use gnulib module getpagesize for portability");
+# endif
+#endif
+
+
+#if @GNULIB_GETPASS@
+/* Function getpass() from module 'getpass':
+     Read a password from /dev/tty or stdin.
+   Function getpass() from module 'getpass-gnu':
+     Read a password of arbitrary length from /dev/tty or stdin.  */
+# if @REPLACE_GETPASS@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef getpass
+#   define getpass rpl_getpass
+#  endif
+_GL_FUNCDECL_RPL (getpass, char *, (const char *prompt)
+                                   _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (getpass, char *, (const char *prompt));
+# else
+#  if !@HAVE_GETPASS@
+_GL_FUNCDECL_SYS (getpass, char *, (const char *prompt)
+                                   _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (getpass, char *, (const char *prompt));
+# endif
+_GL_CXXALIASWARN (getpass);
+#elif defined GNULIB_POSIXCHECK
+# undef getpass
+# if HAVE_RAW_DECL_GETPASS
+_GL_WARN_ON_USE (getpass, "getpass is unportable - "
+                 "use gnulib module getpass or getpass-gnu for portability");
+# endif
+#endif
+
+
+#if @GNULIB_MDA_GETPID@
+/* On native Windows, map 'getpid' to '_getpid', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::getpid always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef getpid
+#   define getpid _getpid
+#  endif
+_GL_CXXALIAS_MDA (getpid, int, (void));
+# else
+_GL_CXXALIAS_SYS (getpid, pid_t, (void));
+# endif
+_GL_CXXALIASWARN (getpid);
+#endif
+
+
+#if @GNULIB_GETUSERSHELL@
+/* Return the next valid login shell on the system, or NULL when the end of
+   the list has been reached.  */
+# if !@HAVE_DECL_GETUSERSHELL@
+_GL_FUNCDECL_SYS (getusershell, char *, (void));
+# endif
+_GL_CXXALIAS_SYS (getusershell, char *, (void));
+_GL_CXXALIASWARN (getusershell);
+#elif defined GNULIB_POSIXCHECK
+# undef getusershell
+# if HAVE_RAW_DECL_GETUSERSHELL
+_GL_WARN_ON_USE (getusershell, "getusershell is unportable - "
+                 "use gnulib module getusershell for portability");
+# endif
+#endif
+
+#if @GNULIB_GETUSERSHELL@
+/* Rewind to pointer that is advanced at each getusershell() call.  */
+# if !@HAVE_DECL_GETUSERSHELL@
+_GL_FUNCDECL_SYS (setusershell, void, (void));
+# endif
+_GL_CXXALIAS_SYS (setusershell, void, (void));
+_GL_CXXALIASWARN (setusershell);
+#elif defined GNULIB_POSIXCHECK
+# undef setusershell
+# if HAVE_RAW_DECL_SETUSERSHELL
+_GL_WARN_ON_USE (setusershell, "setusershell is unportable - "
+                 "use gnulib module getusershell for portability");
+# endif
+#endif
+
+#if @GNULIB_GETUSERSHELL@
+/* Free the pointer that is advanced at each getusershell() call and
+   associated resources.  */
+# if !@HAVE_DECL_GETUSERSHELL@
+_GL_FUNCDECL_SYS (endusershell, void, (void));
+# endif
+_GL_CXXALIAS_SYS (endusershell, void, (void));
+_GL_CXXALIASWARN (endusershell);
+#elif defined GNULIB_POSIXCHECK
+# undef endusershell
+# if HAVE_RAW_DECL_ENDUSERSHELL
+_GL_WARN_ON_USE (endusershell, "endusershell is unportable - "
+                 "use gnulib module getusershell for portability");
+# endif
+#endif
+
+
+#if @GNULIB_GROUP_MEMBER@
+/* Determine whether group id is in calling user's group list.  */
+# if !@HAVE_GROUP_MEMBER@
+_GL_FUNCDECL_SYS (group_member, int, (gid_t gid));
+# endif
+_GL_CXXALIAS_SYS (group_member, int, (gid_t gid));
+_GL_CXXALIASWARN (group_member);
+#elif defined GNULIB_POSIXCHECK
+# undef group_member
+# if HAVE_RAW_DECL_GROUP_MEMBER
+_GL_WARN_ON_USE (group_member, "group_member is unportable - "
+                 "use gnulib module group-member for portability");
+# endif
+#endif
+
+
+#if @GNULIB_ISATTY@
+# if @REPLACE_ISATTY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef isatty
+#   define isatty rpl_isatty
+#  endif
+#  define GNULIB_defined_isatty 1
+_GL_FUNCDECL_RPL (isatty, int, (int fd));
+_GL_CXXALIAS_RPL (isatty, int, (int fd));
+# elif defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef isatty
+#   define isatty _isatty
+#  endif
+_GL_CXXALIAS_MDA (isatty, int, (int fd));
+# else
+_GL_CXXALIAS_SYS (isatty, int, (int fd));
+# endif
+_GL_CXXALIASWARN (isatty);
+#elif defined GNULIB_POSIXCHECK
+# undef isatty
+# if HAVE_RAW_DECL_ISATTY
+_GL_WARN_ON_USE (isatty, "isatty has portability problems on native Windows - "
+                 "use gnulib module isatty for portability");
+# endif
+#elif @GNULIB_MDA_ISATTY@
+/* On native Windows, map 'isatty' to '_isatty', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::isatty always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef isatty
+#   define isatty _isatty
+#  endif
+_GL_CXXALIAS_MDA (isatty, int, (int fd));
+# else
+_GL_CXXALIAS_SYS (isatty, int, (int fd));
+# endif
+_GL_CXXALIASWARN (isatty);
+#endif
+
+
+#if @GNULIB_LCHOWN@
+/* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
+   to GID (if GID is not -1).  Do not follow symbolic links.
+   Return 0 if successful, otherwise -1 and errno set.
+   See the POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/lchown.html>.  */
+# if @REPLACE_LCHOWN@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef lchown
+#   define lchown rpl_lchown
+#  endif
+_GL_FUNCDECL_RPL (lchown, int, (char const *file, uid_t owner, gid_t group)
+                               _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (lchown, int, (char const *file, uid_t owner, gid_t group));
+# else
+#  if !@HAVE_LCHOWN@
+_GL_FUNCDECL_SYS (lchown, int, (char const *file, uid_t owner, gid_t group)
+                               _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (lchown, int, (char const *file, uid_t owner, gid_t group));
+# endif
+_GL_CXXALIASWARN (lchown);
+#elif defined GNULIB_POSIXCHECK
+# undef lchown
+# if HAVE_RAW_DECL_LCHOWN
+_GL_WARN_ON_USE (lchown, "lchown is unportable to pre-POSIX.1-2001 systems - "
+                 "use gnulib module lchown for portability");
+# endif
+#endif
+
+
+#if @GNULIB_LINK@
+/* Create a new hard link for an existing file.
+   Return 0 if successful, otherwise -1 and errno set.
+   See POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/link.html>.  */
+# if @REPLACE_LINK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define link rpl_link
+#  endif
+_GL_FUNCDECL_RPL (link, int, (const char *path1, const char *path2)
+                             _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (link, int, (const char *path1, const char *path2));
+# else
+#  if !@HAVE_LINK@
+_GL_FUNCDECL_SYS (link, int, (const char *path1, const char *path2)
+                             _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (link, int, (const char *path1, const char *path2));
+# endif
+_GL_CXXALIASWARN (link);
+#elif defined GNULIB_POSIXCHECK
+# undef link
+# if HAVE_RAW_DECL_LINK
+_GL_WARN_ON_USE (link, "link is unportable - "
+                 "use gnulib module link for portability");
+# endif
+#endif
+
+
+#if @GNULIB_LINKAT@
+/* Create a new hard link for an existing file, relative to two
+   directories.  FLAG controls whether symlinks are followed.
+   Return 0 if successful, otherwise -1 and errno set.  */
+# if @REPLACE_LINKAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef linkat
+#   define linkat rpl_linkat
+#  endif
+_GL_FUNCDECL_RPL (linkat, int,
+                  (int fd1, const char *path1, int fd2, const char *path2,
+                   int flag)
+                  _GL_ARG_NONNULL ((2, 4)));
+_GL_CXXALIAS_RPL (linkat, int,
+                  (int fd1, const char *path1, int fd2, const char *path2,
+                   int flag));
+# else
+#  if !@HAVE_LINKAT@
+_GL_FUNCDECL_SYS (linkat, int,
+                  (int fd1, const char *path1, int fd2, const char *path2,
+                   int flag)
+                  _GL_ARG_NONNULL ((2, 4)));
+#  endif
+_GL_CXXALIAS_SYS (linkat, int,
+                  (int fd1, const char *path1, int fd2, const char *path2,
+                   int flag));
+# endif
+_GL_CXXALIASWARN (linkat);
+#elif defined GNULIB_POSIXCHECK
+# undef linkat
+# if HAVE_RAW_DECL_LINKAT
+_GL_WARN_ON_USE (linkat, "linkat is unportable - "
+                 "use gnulib module linkat for portability");
+# endif
+#endif
+
+
+#if @GNULIB_LSEEK@
+/* Set the offset of FD relative to SEEK_SET, SEEK_CUR, or SEEK_END.
+   Return the new offset if successful, otherwise -1 and errno set.
+   See the POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/lseek.html>.  */
+# if @REPLACE_LSEEK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define lseek rpl_lseek
+#  endif
+_GL_FUNCDECL_RPL (lseek, off_t, (int fd, off_t offset, int whence));
+_GL_CXXALIAS_RPL (lseek, off_t, (int fd, off_t offset, int whence));
+# elif defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef lseek
+#   define lseek _lseek
+#  endif
+_GL_CXXALIAS_MDA (lseek, off_t, (int fd, off_t offset, int whence));
+# else
+_GL_CXXALIAS_SYS (lseek, off_t, (int fd, off_t offset, int whence));
+# endif
+_GL_CXXALIASWARN (lseek);
+#elif defined GNULIB_POSIXCHECK
+# undef lseek
+# if HAVE_RAW_DECL_LSEEK
+_GL_WARN_ON_USE (lseek, "lseek does not fail with ESPIPE on pipes on some "
+                 "systems - use gnulib module lseek for portability");
+# endif
+#elif @GNULIB_MDA_LSEEK@
+/* On native Windows, map 'lseek' to '_lseek', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::lseek always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef lseek
+#   define lseek _lseek
+#  endif
+_GL_CXXALIAS_MDA (lseek, long, (int fd, long offset, int whence));
+# else
+_GL_CXXALIAS_SYS (lseek, off_t, (int fd, off_t offset, int whence));
+# endif
+_GL_CXXALIASWARN (lseek);
+#endif
+
+
+#if @GNULIB_PIPE@
+/* Create a pipe, defaulting to O_BINARY mode.
+   Store the read-end as fd[0] and the write-end as fd[1].
+   Return 0 upon success, or -1 with errno set upon failure.  */
+# if !@HAVE_PIPE@
+_GL_FUNCDECL_SYS (pipe, int, (int fd[2]) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (pipe, int, (int fd[2]));
+_GL_CXXALIASWARN (pipe);
+#elif defined GNULIB_POSIXCHECK
+# undef pipe
+# if HAVE_RAW_DECL_PIPE
+_GL_WARN_ON_USE (pipe, "pipe is unportable - "
+                 "use gnulib module pipe-posix for portability");
+# endif
+#endif
+
+
+#if @GNULIB_PIPE2@
+/* Create a pipe, applying the given flags when opening the read-end of the
+   pipe and the write-end of the pipe.
+   The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
+   and O_TEXT, O_BINARY (defined in "binary-io.h").
+   Store the read-end as fd[0] and the write-end as fd[1].
+   Return 0 upon success, or -1 with errno set upon failure.
+   See also the Linux man page at
+   <https://www.kernel.org/doc/man-pages/online/pages/man2/pipe2.2.html>.  */
+# if @HAVE_PIPE2@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define pipe2 rpl_pipe2
+#  endif
+_GL_FUNCDECL_RPL (pipe2, int, (int fd[2], int flags) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pipe2, int, (int fd[2], int flags));
+# else
+_GL_FUNCDECL_SYS (pipe2, int, (int fd[2], int flags) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_SYS (pipe2, int, (int fd[2], int flags));
+# endif
+_GL_CXXALIASWARN (pipe2);
+#elif defined GNULIB_POSIXCHECK
+# undef pipe2
+# if HAVE_RAW_DECL_PIPE2
+_GL_WARN_ON_USE (pipe2, "pipe2 is unportable - "
+                 "use gnulib module pipe2 for portability");
+# endif
+#endif
+
+
+#if @GNULIB_PREAD@
+/* Read at most BUFSIZE bytes from FD into BUF, starting at OFFSET.
+   Return the number of bytes placed into BUF if successful, otherwise
+   set errno and return -1.  0 indicates EOF.
+   See the POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/pread.html>.  */
+# if @REPLACE_PREAD@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pread
+#   define pread rpl_pread
+#  endif
+_GL_FUNCDECL_RPL (pread, ssize_t,
+                  (int fd, void *buf, size_t bufsize, off_t offset)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (pread, ssize_t,
+                  (int fd, void *buf, size_t bufsize, off_t offset));
+# else
+#  if !@HAVE_PREAD@
+_GL_FUNCDECL_SYS (pread, ssize_t,
+                  (int fd, void *buf, size_t bufsize, off_t offset)
+                  _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (pread, ssize_t,
+                  (int fd, void *buf, size_t bufsize, off_t offset));
+# endif
+_GL_CXXALIASWARN (pread);
+#elif defined GNULIB_POSIXCHECK
+# undef pread
+# if HAVE_RAW_DECL_PREAD
+_GL_WARN_ON_USE (pread, "pread is unportable - "
+                 "use gnulib module pread for portability");
+# endif
+#endif
+
+
+#if @GNULIB_PWRITE@
+/* Write at most BUFSIZE bytes from BUF into FD, starting at OFFSET.
+   Return the number of bytes written if successful, otherwise
+   set errno and return -1.  0 indicates nothing written.  See the
+   POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/pwrite.html>.  */
+# if @REPLACE_PWRITE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pwrite
+#   define pwrite rpl_pwrite
+#  endif
+_GL_FUNCDECL_RPL (pwrite, ssize_t,
+                  (int fd, const void *buf, size_t bufsize, off_t offset)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (pwrite, ssize_t,
+                  (int fd, const void *buf, size_t bufsize, off_t offset));
+# else
+#  if !@HAVE_PWRITE@
+_GL_FUNCDECL_SYS (pwrite, ssize_t,
+                  (int fd, const void *buf, size_t bufsize, off_t offset)
+                  _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (pwrite, ssize_t,
+                  (int fd, const void *buf, size_t bufsize, off_t offset));
+# endif
+_GL_CXXALIASWARN (pwrite);
+#elif defined GNULIB_POSIXCHECK
+# undef pwrite
+# if HAVE_RAW_DECL_PWRITE
+_GL_WARN_ON_USE (pwrite, "pwrite is unportable - "
+                 "use gnulib module pwrite for portability");
+# endif
+#endif
+
+
+#if @GNULIB_READ@
+/* Read up to COUNT bytes from file descriptor FD into the buffer starting
+   at BUF.  See the POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/read.html>.  */
+# if @REPLACE_READ@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef read
+#   define read rpl_read
+#  endif
+_GL_FUNCDECL_RPL (read, ssize_t, (int fd, void *buf, size_t count)
+                                 _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (read, ssize_t, (int fd, void *buf, size_t count));
+# elif defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef read
+#   define read _read
+#  endif
+_GL_CXXALIAS_MDA (read, ssize_t, (int fd, void *buf, size_t count));
+# else
+_GL_CXXALIAS_SYS (read, ssize_t, (int fd, void *buf, size_t count));
+# endif
+_GL_CXXALIASWARN (read);
+#elif @GNULIB_MDA_READ@
+/* On native Windows, map 'read' to '_read', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::read always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef read
+#   define read _read
+#  endif
+#  ifdef __MINGW32__
+_GL_CXXALIAS_MDA (read, int, (int fd, void *buf, unsigned int count));
+#  else
+_GL_CXXALIAS_MDA (read, ssize_t, (int fd, void *buf, unsigned int count));
+#  endif
+# else
+_GL_CXXALIAS_SYS (read, ssize_t, (int fd, void *buf, size_t count));
+# endif
+_GL_CXXALIASWARN (read);
+#endif
+
+
+#if @GNULIB_READLINK@
+/* Read the contents of the symbolic link FILE and place the first BUFSIZE
+   bytes of it into BUF.  Return the number of bytes placed into BUF if
+   successful, otherwise -1 and errno set.
+   See the POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/readlink.html>.  */
+# if @REPLACE_READLINK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define readlink rpl_readlink
+#  endif
+_GL_FUNCDECL_RPL (readlink, ssize_t,
+                  (const char *restrict file,
+                   char *restrict buf, size_t bufsize)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (readlink, ssize_t,
+                  (const char *restrict file,
+                   char *restrict buf, size_t bufsize));
+# else
+#  if !@HAVE_READLINK@
+_GL_FUNCDECL_SYS (readlink, ssize_t,
+                  (const char *restrict file,
+                   char *restrict buf, size_t bufsize)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (readlink, ssize_t,
+                  (const char *restrict file,
+                   char *restrict buf, size_t bufsize));
+# endif
+_GL_CXXALIASWARN (readlink);
+#elif defined GNULIB_POSIXCHECK
+# undef readlink
+# if HAVE_RAW_DECL_READLINK
+_GL_WARN_ON_USE (readlink, "readlink is unportable - "
+                 "use gnulib module readlink for portability");
+# endif
+#endif
+
+
+#if @GNULIB_READLINKAT@
+# if @REPLACE_READLINKAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define readlinkat rpl_readlinkat
+#  endif
+_GL_FUNCDECL_RPL (readlinkat, ssize_t,
+                  (int fd, char const *restrict file,
+                   char *restrict buf, size_t len)
+                  _GL_ARG_NONNULL ((2, 3)));
+_GL_CXXALIAS_RPL (readlinkat, ssize_t,
+                  (int fd, char const *restrict file,
+                   char *restrict buf, size_t len));
+# else
+#  if !@HAVE_READLINKAT@
+_GL_FUNCDECL_SYS (readlinkat, ssize_t,
+                  (int fd, char const *restrict file,
+                   char *restrict buf, size_t len)
+                  _GL_ARG_NONNULL ((2, 3)));
+#  endif
+_GL_CXXALIAS_SYS (readlinkat, ssize_t,
+                  (int fd, char const *restrict file,
+                   char *restrict buf, size_t len));
+# endif
+_GL_CXXALIASWARN (readlinkat);
+#elif defined GNULIB_POSIXCHECK
+# undef readlinkat
+# if HAVE_RAW_DECL_READLINKAT
+_GL_WARN_ON_USE (readlinkat, "readlinkat is not portable - "
+                 "use gnulib module readlinkat for portability");
+# endif
+#endif
+
+
+#if @GNULIB_RMDIR@
+/* Remove the directory DIR.  */
+# if @REPLACE_RMDIR@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define rmdir rpl_rmdir
+#  endif
+_GL_FUNCDECL_RPL (rmdir, int, (char const *name) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (rmdir, int, (char const *name));
+# elif defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef rmdir
+#   define rmdir _rmdir
+#  endif
+_GL_CXXALIAS_MDA (rmdir, int, (char const *name));
+# else
+_GL_CXXALIAS_SYS (rmdir, int, (char const *name));
+# endif
+_GL_CXXALIASWARN (rmdir);
+#elif defined GNULIB_POSIXCHECK
+# undef rmdir
+# if HAVE_RAW_DECL_RMDIR
+_GL_WARN_ON_USE (rmdir, "rmdir is unportable - "
+                 "use gnulib module rmdir for portability");
+# endif
+#elif @GNULIB_MDA_RMDIR@
+/* On native Windows, map 'rmdir' to '_rmdir', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::rmdir always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef rmdir
+#   define rmdir _rmdir
+#  endif
+_GL_CXXALIAS_MDA (rmdir, int, (char const *name));
+# else
+_GL_CXXALIAS_SYS (rmdir, int, (char const *name));
+# endif
+_GL_CXXALIASWARN (rmdir);
+#endif
+
+
+#if @GNULIB_SETHOSTNAME@
+/* Set the host name of the machine.
+   The host name may or may not be fully qualified.
+
+   Put LEN bytes of NAME into the host name.
+   Return 0 if successful, otherwise, set errno and return -1.
+
+   Platforms with no ability to set the hostname return -1 and set
+   errno = ENOSYS.  */
+# if !@HAVE_SETHOSTNAME@ || !@HAVE_DECL_SETHOSTNAME@
+_GL_FUNCDECL_SYS (sethostname, int, (const char *name, size_t len)
+                                    _GL_ARG_NONNULL ((1)));
+# endif
+/* Need to cast, because on Solaris 11 2011-10, Mac OS X 10.5, IRIX 6.5
+   and FreeBSD 6.4 the second parameter is int.  On Solaris 11
+   2011-10, the first parameter is not const.  */
+_GL_CXXALIAS_SYS_CAST (sethostname, int, (const char *name, size_t len));
+_GL_CXXALIASWARN (sethostname);
+#elif defined GNULIB_POSIXCHECK
+# undef sethostname
+# if HAVE_RAW_DECL_SETHOSTNAME
+_GL_WARN_ON_USE (sethostname, "sethostname is unportable - "
+                 "use gnulib module sethostname for portability");
+# endif
+#endif
+
+
+#if @GNULIB_SLEEP@
+/* Pause the execution of the current thread for N seconds.
+   Returns the number of seconds left to sleep.
+   See the POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/sleep.html>.  */
+# if @REPLACE_SLEEP@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef sleep
+#   define sleep rpl_sleep
+#  endif
+_GL_FUNCDECL_RPL (sleep, unsigned int, (unsigned int n));
+_GL_CXXALIAS_RPL (sleep, unsigned int, (unsigned int n));
+# else
+#  if !@HAVE_SLEEP@
+_GL_FUNCDECL_SYS (sleep, unsigned int, (unsigned int n));
+#  endif
+_GL_CXXALIAS_SYS (sleep, unsigned int, (unsigned int n));
+# endif
+_GL_CXXALIASWARN (sleep);
+#elif defined GNULIB_POSIXCHECK
+# undef sleep
+# if HAVE_RAW_DECL_SLEEP
+_GL_WARN_ON_USE (sleep, "sleep is unportable - "
+                 "use gnulib module sleep for portability");
+# endif
+#endif
+
+
+#if @GNULIB_MDA_SWAB@
+/* On native Windows, map 'swab' to '_swab', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::swab always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef swab
+#   define swab _swab
+#  endif
+/* Need to cast, because in old mingw the arguments are
+                             (const char *from, char *to, size_t n).  */
+_GL_CXXALIAS_MDA_CAST (swab, void, (char *from, char *to, int n));
+# else
+#  if defined __hpux /* HP-UX */
+_GL_CXXALIAS_SYS (swab, void, (const char *from, char *to, int n));
+#  elif defined __sun && !defined _XPG4 /* Solaris */
+_GL_CXXALIAS_SYS (swab, void, (const char *from, char *to, ssize_t n));
+#  else
+_GL_CXXALIAS_SYS (swab, void, (const void *from, void *to, ssize_t n));
+#  endif
+# endif
+_GL_CXXALIASWARN (swab);
+#endif
+
+
+#if @GNULIB_SYMLINK@
+# if @REPLACE_SYMLINK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef symlink
+#   define symlink rpl_symlink
+#  endif
+_GL_FUNCDECL_RPL (symlink, int, (char const *contents, char const *file)
+                                _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (symlink, int, (char const *contents, char const *file));
+# else
+#  if !@HAVE_SYMLINK@
+_GL_FUNCDECL_SYS (symlink, int, (char const *contents, char const *file)
+                                _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (symlink, int, (char const *contents, char const *file));
+# endif
+_GL_CXXALIASWARN (symlink);
+#elif defined GNULIB_POSIXCHECK
+# undef symlink
+# if HAVE_RAW_DECL_SYMLINK
+_GL_WARN_ON_USE (symlink, "symlink is not portable - "
+                 "use gnulib module symlink for portability");
+# endif
+#endif
+
+
+#if @GNULIB_SYMLINKAT@
+# if @REPLACE_SYMLINKAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef symlinkat
+#   define symlinkat rpl_symlinkat
+#  endif
+_GL_FUNCDECL_RPL (symlinkat, int,
+                  (char const *contents, int fd, char const *file)
+                  _GL_ARG_NONNULL ((1, 3)));
+_GL_CXXALIAS_RPL (symlinkat, int,
+                  (char const *contents, int fd, char const *file));
+# else
+#  if !@HAVE_SYMLINKAT@
+_GL_FUNCDECL_SYS (symlinkat, int,
+                  (char const *contents, int fd, char const *file)
+                  _GL_ARG_NONNULL ((1, 3)));
+#  endif
+_GL_CXXALIAS_SYS (symlinkat, int,
+                  (char const *contents, int fd, char const *file));
+# endif
+_GL_CXXALIASWARN (symlinkat);
+#elif defined GNULIB_POSIXCHECK
+# undef symlinkat
+# if HAVE_RAW_DECL_SYMLINKAT
+_GL_WARN_ON_USE (symlinkat, "symlinkat is not portable - "
+                 "use gnulib module symlinkat for portability");
+# endif
+#endif
+
+
+#if @GNULIB_TRUNCATE@
+/* Change the size of the file designated by FILENAME to become equal to LENGTH.
+   Return 0 if successful, otherwise -1 and errno set.
+   See the POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/truncate.html>.  */
+# if @REPLACE_TRUNCATE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef truncate
+#   define truncate rpl_truncate
+#  endif
+_GL_FUNCDECL_RPL (truncate, int, (const char *filename, off_t length)
+                                 _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (truncate, int, (const char *filename, off_t length));
+# else
+#  if !@HAVE_DECL_TRUNCATE@
+_GL_FUNCDECL_SYS (truncate, int, (const char *filename, off_t length)
+                                 _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (truncate, int, (const char *filename, off_t length));
+# endif
+_GL_CXXALIASWARN (truncate);
+#elif defined GNULIB_POSIXCHECK
+# undef truncate
+# if HAVE_RAW_DECL_TRUNCATE
+_GL_WARN_ON_USE (truncate, "truncate is unportable - "
+                 "use gnulib module truncate for portability");
+# endif
+#endif
+
+
+#if @GNULIB_TTYNAME_R@
+/* Store at most BUFLEN characters of the pathname of the terminal FD is
+   open on in BUF.  Return 0 on success, otherwise an error number.  */
+# if @REPLACE_TTYNAME_R@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef ttyname_r
+#   define ttyname_r rpl_ttyname_r
+#  endif
+_GL_FUNCDECL_RPL (ttyname_r, int,
+                  (int fd, char *buf, size_t buflen) _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (ttyname_r, int,
+                  (int fd, char *buf, size_t buflen));
+# else
+#  if !@HAVE_DECL_TTYNAME_R@
+_GL_FUNCDECL_SYS (ttyname_r, int,
+                  (int fd, char *buf, size_t buflen) _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (ttyname_r, int,
+                  (int fd, char *buf, size_t buflen));
+# endif
+_GL_CXXALIASWARN (ttyname_r);
+#elif defined GNULIB_POSIXCHECK
+# undef ttyname_r
+# if HAVE_RAW_DECL_TTYNAME_R
+_GL_WARN_ON_USE (ttyname_r, "ttyname_r is not portable - "
+                 "use gnulib module ttyname_r for portability");
+# endif
+#endif
+
+
+#if @GNULIB_UNLINK@
+# if @REPLACE_UNLINK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef unlink
+#   define unlink rpl_unlink
+#  endif
+_GL_FUNCDECL_RPL (unlink, int, (char const *file) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (unlink, int, (char const *file));
+# elif defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef unlink
+#   define unlink _unlink
+#  endif
+_GL_CXXALIAS_MDA (unlink, int, (char const *file));
+# else
+_GL_CXXALIAS_SYS (unlink, int, (char const *file));
+# endif
+_GL_CXXALIASWARN (unlink);
+#elif defined GNULIB_POSIXCHECK
+# undef unlink
+# if HAVE_RAW_DECL_UNLINK
+_GL_WARN_ON_USE (unlink, "unlink is not portable - "
+                 "use gnulib module unlink for portability");
+# endif
+#elif @GNULIB_MDA_UNLINK@
+/* On native Windows, map 'unlink' to '_unlink', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::unlink always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef unlink
+#   define unlink _unlink
+#  endif
+_GL_CXXALIAS_MDA (unlink, int, (char const *file));
+# else
+_GL_CXXALIAS_SYS (unlink, int, (char const *file));
+# endif
+_GL_CXXALIASWARN (unlink);
+#endif
+
+
+#if @GNULIB_UNLINKAT@
+# if @REPLACE_UNLINKAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef unlinkat
+#   define unlinkat rpl_unlinkat
+#  endif
+_GL_FUNCDECL_RPL (unlinkat, int, (int fd, char const *file, int flag)
+                                 _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (unlinkat, int, (int fd, char const *file, int flag));
+# else
+#  if !@HAVE_UNLINKAT@
+_GL_FUNCDECL_SYS (unlinkat, int, (int fd, char const *file, int flag)
+                                 _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (unlinkat, int, (int fd, char const *file, int flag));
+# endif
+_GL_CXXALIASWARN (unlinkat);
+#elif defined GNULIB_POSIXCHECK
+# undef unlinkat
+# if HAVE_RAW_DECL_UNLINKAT
+_GL_WARN_ON_USE (unlinkat, "unlinkat is not portable - "
+                 "use gnulib module unlinkat for portability");
+# endif
+#endif
+
+
+#if @GNULIB_USLEEP@
+/* Pause the execution of the current thread for N microseconds.
+   Returns 0 on completion, or -1 on range error.
+   See the POSIX:2001 specification
+   <https://pubs.opengroup.org/onlinepubs/009695399/functions/usleep.html>.  */
+# if @REPLACE_USLEEP@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef usleep
+#   define usleep rpl_usleep
+#  endif
+_GL_FUNCDECL_RPL (usleep, int, (useconds_t n));
+_GL_CXXALIAS_RPL (usleep, int, (useconds_t n));
+# else
+#  if !@HAVE_USLEEP@
+_GL_FUNCDECL_SYS (usleep, int, (useconds_t n));
+#  endif
+/* Need to cast, because on Haiku, the first parameter is
+                                     unsigned int n.  */
+_GL_CXXALIAS_SYS_CAST (usleep, int, (useconds_t n));
+# endif
+_GL_CXXALIASWARN (usleep);
+#elif defined GNULIB_POSIXCHECK
+# undef usleep
+# if HAVE_RAW_DECL_USLEEP
+_GL_WARN_ON_USE (usleep, "usleep is unportable - "
+                 "use gnulib module usleep for portability");
+# endif
+#endif
+
+
+#if @GNULIB_WRITE@
+/* Write up to COUNT bytes starting at BUF to file descriptor FD.
+   See the POSIX:2008 specification
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/write.html>.  */
+# if @REPLACE_WRITE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef write
+#   define write rpl_write
+#  endif
+_GL_FUNCDECL_RPL (write, ssize_t, (int fd, const void *buf, size_t count)
+                                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (write, ssize_t, (int fd, const void *buf, size_t count));
+# elif defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef write
+#   define write _write
+#  endif
+_GL_CXXALIAS_MDA (write, ssize_t, (int fd, const void *buf, size_t count));
+# else
+_GL_CXXALIAS_SYS (write, ssize_t, (int fd, const void *buf, size_t count));
+# endif
+_GL_CXXALIASWARN (write);
+#elif @GNULIB_MDA_WRITE@
+/* On native Windows, map 'write' to '_write', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::write always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef write
+#   define write _write
+#  endif
+#  ifdef __MINGW32__
+_GL_CXXALIAS_MDA (write, int, (int fd, const void *buf, unsigned int count));
+#  else
+_GL_CXXALIAS_MDA (write, ssize_t, (int fd, const void *buf, unsigned int count));
+#  endif
+# else
+_GL_CXXALIAS_SYS (write, ssize_t, (int fd, const void *buf, size_t count));
+# endif
+_GL_CXXALIASWARN (write);
+#endif
+
+_GL_INLINE_HEADER_END
+
+#endif /* _@GUARD_PREFIX@_UNISTD_H */
+#endif /* _GL_INCLUDING_UNISTD_H */
+#endif /* _@GUARD_PREFIX@_UNISTD_H */
diff --git a/src/grep/lib/unistr.in.h b/src/grep/lib/unistr.in.h
new file mode 100644
index 0000000..3b38207
--- /dev/null
+++ b/src/grep/lib/unistr.in.h
@@ -0,0 +1,753 @@
+/* Elementary Unicode string functions.
+   Copyright (C) 2001-2002, 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _UNISTR_H
+#define _UNISTR_H
+
+#include "unitypes.h"
+
+/* Get bool.  */
+#include <stdbool.h>
+
+/* Get size_t, ptrdiff_t.  */
+#include <stddef.h>
+
+/* Get free().  */
+#include <stdlib.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Conventions:
+
+   All functions prefixed with u8_ operate on UTF-8 encoded strings.
+   Their unit is an uint8_t (1 byte).
+
+   All functions prefixed with u16_ operate on UTF-16 encoded strings.
+   Their unit is an uint16_t (a 2-byte word).
+
+   All functions prefixed with u32_ operate on UCS-4 encoded strings.
+   Their unit is an uint32_t (a 4-byte word).
+
+   All argument pairs (s, n) denote a Unicode string s[0..n-1] with exactly
+   n units.
+
+   All arguments starting with "str" and the arguments of functions starting
+   with u8_str/u16_str/u32_str denote a NUL terminated string, i.e. a string
+   which terminates at the first NUL unit.  This termination unit is
+   considered part of the string for all memory allocation purposes, but
+   is not considered part of the string for all other logical purposes.
+
+   Functions returning a string result take a (resultbuf, lengthp) argument
+   pair.  If resultbuf is not NULL and the result fits into *lengthp units,
+   it is put in resultbuf, and resultbuf is returned.  Otherwise, a freshly
+   allocated string is returned.  In both cases, *lengthp is set to the
+   length (number of units) of the returned string.  In case of error,
+   NULL is returned and errno is set.  */
+
+
+/* Elementary string checks.  */
+
+/* Check whether an UTF-8 string is well-formed.
+   Return NULL if valid, or a pointer to the first invalid unit otherwise.  */
+extern const uint8_t *
+       u8_check (const uint8_t *s, size_t n)
+       _UC_ATTRIBUTE_PURE;
+
+/* Check whether an UTF-16 string is well-formed.
+   Return NULL if valid, or a pointer to the first invalid unit otherwise.  */
+extern const uint16_t *
+       u16_check (const uint16_t *s, size_t n)
+       _UC_ATTRIBUTE_PURE;
+
+/* Check whether an UCS-4 string is well-formed.
+   Return NULL if valid, or a pointer to the first invalid unit otherwise.  */
+extern const uint32_t *
+       u32_check (const uint32_t *s, size_t n)
+       _UC_ATTRIBUTE_PURE;
+
+
+/* Elementary string conversions.  */
+
+/* Convert an UTF-8 string to an UTF-16 string.  */
+extern uint16_t *
+       u8_to_u16 (const uint8_t *s, size_t n, uint16_t *resultbuf,
+                  size_t *lengthp);
+
+/* Convert an UTF-8 string to an UCS-4 string.  */
+extern uint32_t *
+       u8_to_u32 (const uint8_t *s, size_t n, uint32_t *resultbuf,
+                  size_t *lengthp);
+
+/* Convert an UTF-16 string to an UTF-8 string.  */
+extern uint8_t *
+       u16_to_u8 (const uint16_t *s, size_t n, uint8_t *resultbuf,
+                  size_t *lengthp);
+
+/* Convert an UTF-16 string to an UCS-4 string.  */
+extern uint32_t *
+       u16_to_u32 (const uint16_t *s, size_t n, uint32_t *resultbuf,
+                   size_t *lengthp);
+
+/* Convert an UCS-4 string to an UTF-8 string.  */
+extern uint8_t *
+       u32_to_u8 (const uint32_t *s, size_t n, uint8_t *resultbuf,
+                  size_t *lengthp);
+
+/* Convert an UCS-4 string to an UTF-16 string.  */
+extern uint16_t *
+       u32_to_u16 (const uint32_t *s, size_t n, uint16_t *resultbuf,
+                   size_t *lengthp);
+
+
+/* Elementary string functions.  */
+
+/* Return the length (number of units) of the first character in S, which is
+   no longer than N.  Return 0 if it is the NUL character.  Return -1 upon
+   failure.  */
+/* Similar to mblen(), except that s must not be NULL.  */
+extern int
+       u8_mblen (const uint8_t *s, size_t n)
+       _UC_ATTRIBUTE_PURE;
+extern int
+       u16_mblen (const uint16_t *s, size_t n)
+       _UC_ATTRIBUTE_PURE;
+extern int
+       u32_mblen (const uint32_t *s, size_t n)
+       _UC_ATTRIBUTE_PURE;
+
+/* Return the length (number of units) of the first character in S, putting
+   its 'ucs4_t' representation in *PUC.  Upon failure, *PUC is set to 0xfffd,
+   and an appropriate number of units is returned.
+   The number of available units, N, must be > 0.  */
+/* Similar to mbtowc(), except that puc and s must not be NULL, n must be > 0,
+   and the NUL character is not treated specially.  */
+/* The variants with _unsafe suffix are for backward compatibility with
+   libunistring versions < 0.9.7.  */
+
+#if GNULIB_UNISTR_U8_MBTOUC_UNSAFE || HAVE_LIBUNISTRING
+# if !HAVE_INLINE
+extern int
+       u8_mbtouc_unsafe (ucs4_t *puc, const uint8_t *s, size_t n);
+# else
+extern int
+       u8_mbtouc_unsafe_aux (ucs4_t *puc, const uint8_t *s, size_t n);
+static inline int
+u8_mbtouc_unsafe (ucs4_t *puc, const uint8_t *s, size_t n)
+{
+  uint8_t c = *s;
+
+  if (c < 0x80)
+    {
+      *puc = c;
+      return 1;
+    }
+  else
+    return u8_mbtouc_unsafe_aux (puc, s, n);
+}
+# endif
+#endif
+
+#if GNULIB_UNISTR_U16_MBTOUC_UNSAFE || HAVE_LIBUNISTRING
+# if !HAVE_INLINE
+extern int
+       u16_mbtouc_unsafe (ucs4_t *puc, const uint16_t *s, size_t n);
+# else
+extern int
+       u16_mbtouc_unsafe_aux (ucs4_t *puc, const uint16_t *s, size_t n);
+static inline int
+u16_mbtouc_unsafe (ucs4_t *puc, const uint16_t *s, size_t n)
+{
+  uint16_t c = *s;
+
+  if (c < 0xd800 || c >= 0xe000)
+    {
+      *puc = c;
+      return 1;
+    }
+  else
+    return u16_mbtouc_unsafe_aux (puc, s, n);
+}
+# endif
+#endif
+
+#if GNULIB_UNISTR_U32_MBTOUC_UNSAFE || HAVE_LIBUNISTRING
+# if !HAVE_INLINE
+extern int
+       u32_mbtouc_unsafe (ucs4_t *puc, const uint32_t *s, size_t n);
+# else
+static inline int
+u32_mbtouc_unsafe (ucs4_t *puc,
+                   const uint32_t *s, _GL_ATTRIBUTE_MAYBE_UNUSED size_t n)
+{
+  uint32_t c = *s;
+
+  if (c < 0xd800 || (c >= 0xe000 && c < 0x110000))
+    *puc = c;
+  else
+    /* invalid multibyte character */
+    *puc = 0xfffd;
+  return 1;
+}
+# endif
+#endif
+
+#if GNULIB_UNISTR_U8_MBTOUC || HAVE_LIBUNISTRING
+# if !HAVE_INLINE
+extern int
+       u8_mbtouc (ucs4_t *puc, const uint8_t *s, size_t n);
+# else
+extern int
+       u8_mbtouc_aux (ucs4_t *puc, const uint8_t *s, size_t n);
+static inline int
+u8_mbtouc (ucs4_t *puc, const uint8_t *s, size_t n)
+{
+  uint8_t c = *s;
+
+  if (c < 0x80)
+    {
+      *puc = c;
+      return 1;
+    }
+  else
+    return u8_mbtouc_aux (puc, s, n);
+}
+# endif
+#endif
+
+#if GNULIB_UNISTR_U16_MBTOUC || HAVE_LIBUNISTRING
+# if !HAVE_INLINE
+extern int
+       u16_mbtouc (ucs4_t *puc, const uint16_t *s, size_t n);
+# else
+extern int
+       u16_mbtouc_aux (ucs4_t *puc, const uint16_t *s, size_t n);
+static inline int
+u16_mbtouc (ucs4_t *puc, const uint16_t *s, size_t n)
+{
+  uint16_t c = *s;
+
+  if (c < 0xd800 || c >= 0xe000)
+    {
+      *puc = c;
+      return 1;
+    }
+  else
+    return u16_mbtouc_aux (puc, s, n);
+}
+# endif
+#endif
+
+#if GNULIB_UNISTR_U32_MBTOUC || HAVE_LIBUNISTRING
+# if !HAVE_INLINE
+extern int
+       u32_mbtouc (ucs4_t *puc, const uint32_t *s, size_t n);
+# else
+static inline int
+u32_mbtouc (ucs4_t *puc, const uint32_t *s,
+            _GL_ATTRIBUTE_MAYBE_UNUSED size_t n)
+{
+  uint32_t c = *s;
+
+  if (c < 0xd800 || (c >= 0xe000 && c < 0x110000))
+    *puc = c;
+  else
+    /* invalid multibyte character */
+    *puc = 0xfffd;
+  return 1;
+}
+# endif
+#endif
+
+/* Return the length (number of units) of the first character in S, putting
+   its 'ucs4_t' representation in *PUC.  Upon failure, *PUC is set to 0xfffd,
+   and -1 is returned for an invalid sequence of units, -2 is returned for an
+   incomplete sequence of units.
+   The number of available units, N, must be > 0.  */
+/* Similar to u*_mbtouc(), except that the return value gives more details
+   about the failure, similar to mbrtowc().  */
+
+#if GNULIB_UNISTR_U8_MBTOUCR || HAVE_LIBUNISTRING
+extern int
+       u8_mbtoucr (ucs4_t *puc, const uint8_t *s, size_t n);
+#endif
+
+#if GNULIB_UNISTR_U16_MBTOUCR || HAVE_LIBUNISTRING
+extern int
+       u16_mbtoucr (ucs4_t *puc, const uint16_t *s, size_t n);
+#endif
+
+#if GNULIB_UNISTR_U32_MBTOUCR || HAVE_LIBUNISTRING
+extern int
+       u32_mbtoucr (ucs4_t *puc, const uint32_t *s, size_t n);
+#endif
+
+/* Put the multibyte character represented by UC in S, returning its
+   length.  Return -1 upon failure, -2 if the number of available units, N,
+   is too small.  The latter case cannot occur if N >= 6/2/1, respectively.  */
+/* Similar to wctomb(), except that s must not be NULL, and the argument n
+   must be specified.  */
+
+#if GNULIB_UNISTR_U8_UCTOMB || HAVE_LIBUNISTRING
+/* Auxiliary function, also used by u8_chr, u8_strchr, u8_strrchr.  */
+extern int
+       u8_uctomb_aux (uint8_t *s, ucs4_t uc, ptrdiff_t n);
+# if !HAVE_INLINE
+extern int
+       u8_uctomb (uint8_t *s, ucs4_t uc, ptrdiff_t n);
+# else
+static inline int
+u8_uctomb (uint8_t *s, ucs4_t uc, ptrdiff_t n)
+{
+  if (uc < 0x80 && n > 0)
+    {
+      s[0] = uc;
+      return 1;
+    }
+  else
+    return u8_uctomb_aux (s, uc, n);
+}
+# endif
+#endif
+
+#if GNULIB_UNISTR_U16_UCTOMB || HAVE_LIBUNISTRING
+/* Auxiliary function, also used by u16_chr, u16_strchr, u16_strrchr.  */
+extern int
+       u16_uctomb_aux (uint16_t *s, ucs4_t uc, ptrdiff_t n);
+# if !HAVE_INLINE
+extern int
+       u16_uctomb (uint16_t *s, ucs4_t uc, ptrdiff_t n);
+# else
+static inline int
+u16_uctomb (uint16_t *s, ucs4_t uc, ptrdiff_t n)
+{
+  if (uc < 0xd800 && n > 0)
+    {
+      s[0] = uc;
+      return 1;
+    }
+  else
+    return u16_uctomb_aux (s, uc, n);
+}
+# endif
+#endif
+
+#if GNULIB_UNISTR_U32_UCTOMB || HAVE_LIBUNISTRING
+# if !HAVE_INLINE
+extern int
+       u32_uctomb (uint32_t *s, ucs4_t uc, ptrdiff_t n);
+# else
+static inline int
+u32_uctomb (uint32_t *s, ucs4_t uc, ptrdiff_t n)
+{
+  if (uc < 0xd800 || (uc >= 0xe000 && uc < 0x110000))
+    {
+      if (n > 0)
+        {
+          *s = uc;
+          return 1;
+        }
+      else
+        return -2;
+    }
+  else
+    return -1;
+}
+# endif
+#endif
+
+/* Copy N units from SRC to DEST.  */
+/* Similar to memcpy().  */
+extern uint8_t *
+       u8_cpy (uint8_t *_UC_RESTRICT dest, const uint8_t *src, size_t n);
+extern uint16_t *
+       u16_cpy (uint16_t *_UC_RESTRICT dest, const uint16_t *src, size_t n);
+extern uint32_t *
+       u32_cpy (uint32_t *_UC_RESTRICT dest, const uint32_t *src, size_t n);
+
+/* Copy N units from SRC to DEST, guaranteeing correct behavior for
+   overlapping memory areas.  */
+/* Similar to memmove().  */
+extern uint8_t *
+       u8_move (uint8_t *dest, const uint8_t *src, size_t n);
+extern uint16_t *
+       u16_move (uint16_t *dest, const uint16_t *src, size_t n);
+extern uint32_t *
+       u32_move (uint32_t *dest, const uint32_t *src, size_t n);
+
+/* Set the first N characters of S to UC.  UC should be a character that
+   occupies only 1 unit.  */
+/* Similar to memset().  */
+extern uint8_t *
+       u8_set (uint8_t *s, ucs4_t uc, size_t n);
+extern uint16_t *
+       u16_set (uint16_t *s, ucs4_t uc, size_t n);
+extern uint32_t *
+       u32_set (uint32_t *s, ucs4_t uc, size_t n);
+
+/* Compare S1 and S2, each of length N.  */
+/* Similar to memcmp().  */
+extern int
+       u8_cmp (const uint8_t *s1, const uint8_t *s2, size_t n)
+       _UC_ATTRIBUTE_PURE;
+extern int
+       u16_cmp (const uint16_t *s1, const uint16_t *s2, size_t n)
+       _UC_ATTRIBUTE_PURE;
+extern int
+       u32_cmp (const uint32_t *s1, const uint32_t *s2, size_t n)
+       _UC_ATTRIBUTE_PURE;
+
+/* Compare S1 and S2.  */
+/* Similar to the gnulib function memcmp2().  */
+extern int
+       u8_cmp2 (const uint8_t *s1, size_t n1, const uint8_t *s2, size_t n2)
+       _UC_ATTRIBUTE_PURE;
+extern int
+       u16_cmp2 (const uint16_t *s1, size_t n1, const uint16_t *s2, size_t n2)
+       _UC_ATTRIBUTE_PURE;
+extern int
+       u32_cmp2 (const uint32_t *s1, size_t n1, const uint32_t *s2, size_t n2)
+       _UC_ATTRIBUTE_PURE;
+
+/* Search the string at S for UC.  */
+/* Similar to memchr().  */
+extern uint8_t *
+       u8_chr (const uint8_t *s, size_t n, ucs4_t uc)
+       _UC_ATTRIBUTE_PURE;
+extern uint16_t *
+       u16_chr (const uint16_t *s, size_t n, ucs4_t uc)
+       _UC_ATTRIBUTE_PURE;
+extern uint32_t *
+       u32_chr (const uint32_t *s, size_t n, ucs4_t uc)
+       _UC_ATTRIBUTE_PURE;
+
+/* Count the number of Unicode characters in the N units from S.  */
+/* Similar to mbsnlen().  */
+extern size_t
+       u8_mbsnlen (const uint8_t *s, size_t n)
+       _UC_ATTRIBUTE_PURE;
+extern size_t
+       u16_mbsnlen (const uint16_t *s, size_t n)
+       _UC_ATTRIBUTE_PURE;
+extern size_t
+       u32_mbsnlen (const uint32_t *s, size_t n)
+       _UC_ATTRIBUTE_PURE;
+
+/* Elementary string functions with memory allocation.  */
+
+/* Make a freshly allocated copy of S, of length N.  */
+extern uint8_t *
+       u8_cpy_alloc (const uint8_t *s, size_t n);
+extern uint16_t *
+       u16_cpy_alloc (const uint16_t *s, size_t n);
+extern uint32_t *
+       u32_cpy_alloc (const uint32_t *s, size_t n);
+
+/* Elementary string functions on NUL terminated strings.  */
+
+/* Return the length (number of units) of the first character in S.
+   Return 0 if it is the NUL character.  Return -1 upon failure.  */
+extern int
+       u8_strmblen (const uint8_t *s)
+       _UC_ATTRIBUTE_PURE;
+extern int
+       u16_strmblen (const uint16_t *s)
+       _UC_ATTRIBUTE_PURE;
+extern int
+       u32_strmblen (const uint32_t *s)
+       _UC_ATTRIBUTE_PURE;
+
+/* Return the length (number of units) of the first character in S, putting
+   its 'ucs4_t' representation in *PUC.  Return 0 if it is the NUL
+   character.  Return -1 upon failure.  */
+extern int
+       u8_strmbtouc (ucs4_t *puc, const uint8_t *s);
+extern int
+       u16_strmbtouc (ucs4_t *puc, const uint16_t *s);
+extern int
+       u32_strmbtouc (ucs4_t *puc, const uint32_t *s);
+
+/* Forward iteration step.  Advances the pointer past the next character,
+   or returns NULL if the end of the string has been reached.  Puts the
+   character's 'ucs4_t' representation in *PUC.  */
+extern const uint8_t *
+       u8_next (ucs4_t *puc, const uint8_t *s);
+extern const uint16_t *
+       u16_next (ucs4_t *puc, const uint16_t *s);
+extern const uint32_t *
+       u32_next (ucs4_t *puc, const uint32_t *s);
+
+/* Backward iteration step.  Advances the pointer to point to the previous
+   character, or returns NULL if the beginning of the string had been reached.
+   Puts the character's 'ucs4_t' representation in *PUC.  */
+extern const uint8_t *
+       u8_prev (ucs4_t *puc, const uint8_t *s, const uint8_t *start);
+extern const uint16_t *
+       u16_prev (ucs4_t *puc, const uint16_t *s, const uint16_t *start);
+extern const uint32_t *
+       u32_prev (ucs4_t *puc, const uint32_t *s, const uint32_t *start);
+
+/* Return the number of units in S.  */
+/* Similar to strlen(), wcslen().  */
+extern size_t
+       u8_strlen (const uint8_t *s)
+       _UC_ATTRIBUTE_PURE;
+extern size_t
+       u16_strlen (const uint16_t *s)
+       _UC_ATTRIBUTE_PURE;
+extern size_t
+       u32_strlen (const uint32_t *s)
+       _UC_ATTRIBUTE_PURE;
+
+/* Return the number of units in S, but at most MAXLEN.  */
+/* Similar to strnlen(), wcsnlen().  */
+extern size_t
+       u8_strnlen (const uint8_t *s, size_t maxlen)
+       _UC_ATTRIBUTE_PURE;
+extern size_t
+       u16_strnlen (const uint16_t *s, size_t maxlen)
+       _UC_ATTRIBUTE_PURE;
+extern size_t
+       u32_strnlen (const uint32_t *s, size_t maxlen)
+       _UC_ATTRIBUTE_PURE;
+
+/* Copy SRC to DEST.  */
+/* Similar to strcpy(), wcscpy().  */
+extern uint8_t *
+       u8_strcpy (uint8_t *_UC_RESTRICT dest, const uint8_t *src);
+extern uint16_t *
+       u16_strcpy (uint16_t *_UC_RESTRICT dest, const uint16_t *src);
+extern uint32_t *
+       u32_strcpy (uint32_t *_UC_RESTRICT dest, const uint32_t *src);
+
+/* Copy SRC to DEST, returning the address of the terminating NUL in DEST.  */
+/* Similar to stpcpy().  */
+extern uint8_t *
+       u8_stpcpy (uint8_t *_UC_RESTRICT dest, const uint8_t *src);
+extern uint16_t *
+       u16_stpcpy (uint16_t *_UC_RESTRICT dest, const uint16_t *src);
+extern uint32_t *
+       u32_stpcpy (uint32_t *_UC_RESTRICT dest, const uint32_t *src);
+
+/* Copy no more than N units of SRC to DEST.  */
+/* Similar to strncpy(), wcsncpy().  */
+extern uint8_t *
+       u8_strncpy (uint8_t *_UC_RESTRICT dest, const uint8_t *src, size_t n);
+extern uint16_t *
+       u16_strncpy (uint16_t *_UC_RESTRICT dest, const uint16_t *src, size_t n);
+extern uint32_t *
+       u32_strncpy (uint32_t *_UC_RESTRICT dest, const uint32_t *src, size_t n);
+
+/* Copy no more than N units of SRC to DEST.  Return a pointer past the last
+   non-NUL unit written into DEST.  */
+/* Similar to stpncpy().  */
+extern uint8_t *
+       u8_stpncpy (uint8_t *_UC_RESTRICT dest, const uint8_t *src, size_t n);
+extern uint16_t *
+       u16_stpncpy (uint16_t *_UC_RESTRICT dest, const uint16_t *src, size_t n);
+extern uint32_t *
+       u32_stpncpy (uint32_t *_UC_RESTRICT dest, const uint32_t *src, size_t n);
+
+/* Append SRC onto DEST.  */
+/* Similar to strcat(), wcscat().  */
+extern uint8_t *
+       u8_strcat (uint8_t *_UC_RESTRICT dest, const uint8_t *src);
+extern uint16_t *
+       u16_strcat (uint16_t *_UC_RESTRICT dest, const uint16_t *src);
+extern uint32_t *
+       u32_strcat (uint32_t *_UC_RESTRICT dest, const uint32_t *src);
+
+/* Append no more than N units of SRC onto DEST.  */
+/* Similar to strncat(), wcsncat().  */
+extern uint8_t *
+       u8_strncat (uint8_t *_UC_RESTRICT dest, const uint8_t *src, size_t n);
+extern uint16_t *
+       u16_strncat (uint16_t *_UC_RESTRICT dest, const uint16_t *src, size_t n);
+extern uint32_t *
+       u32_strncat (uint32_t *_UC_RESTRICT dest, const uint32_t *src, size_t n);
+
+/* Compare S1 and S2.  */
+/* Similar to strcmp(), wcscmp().  */
+#ifdef __sun
+/* Avoid a collision with the u8_strcmp() function in Solaris 11 libc.  */
+extern int
+       u8_strcmp_gnu (const uint8_t *s1, const uint8_t *s2)
+       _UC_ATTRIBUTE_PURE;
+# define u8_strcmp u8_strcmp_gnu
+#else
+extern int
+       u8_strcmp (const uint8_t *s1, const uint8_t *s2)
+       _UC_ATTRIBUTE_PURE;
+#endif
+extern int
+       u16_strcmp (const uint16_t *s1, const uint16_t *s2)
+       _UC_ATTRIBUTE_PURE;
+extern int
+       u32_strcmp (const uint32_t *s1, const uint32_t *s2)
+       _UC_ATTRIBUTE_PURE;
+
+/* Compare S1 and S2 using the collation rules of the current locale.
+   Return -1 if S1 < S2, 0 if S1 = S2, 1 if S1 > S2.
+   Upon failure, set errno and return any value.  */
+/* Similar to strcoll(), wcscoll().  */
+extern int
+       u8_strcoll (const uint8_t *s1, const uint8_t *s2);
+extern int
+       u16_strcoll (const uint16_t *s1, const uint16_t *s2);
+extern int
+       u32_strcoll (const uint32_t *s1, const uint32_t *s2);
+
+/* Compare no more than N units of S1 and S2.  */
+/* Similar to strncmp(), wcsncmp().  */
+extern int
+       u8_strncmp (const uint8_t *s1, const uint8_t *s2, size_t n)
+       _UC_ATTRIBUTE_PURE;
+extern int
+       u16_strncmp (const uint16_t *s1, const uint16_t *s2, size_t n)
+       _UC_ATTRIBUTE_PURE;
+extern int
+       u32_strncmp (const uint32_t *s1, const uint32_t *s2, size_t n)
+       _UC_ATTRIBUTE_PURE;
+
+/* Duplicate S, returning an identical malloc'd string.  */
+/* Similar to strdup(), wcsdup().  */
+extern uint8_t *
+       u8_strdup (const uint8_t *s)
+       _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE;
+extern uint16_t *
+       u16_strdup (const uint16_t *s)
+       _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE;
+extern uint32_t *
+       u32_strdup (const uint32_t *s)
+       _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE;
+
+/* Find the first occurrence of UC in STR.  */
+/* Similar to strchr(), wcschr().  */
+extern uint8_t *
+       u8_strchr (const uint8_t *str, ucs4_t uc)
+       _UC_ATTRIBUTE_PURE;
+extern uint16_t *
+       u16_strchr (const uint16_t *str, ucs4_t uc)
+       _UC_ATTRIBUTE_PURE;
+extern uint32_t *
+       u32_strchr (const uint32_t *str, ucs4_t uc)
+       _UC_ATTRIBUTE_PURE;
+
+/* Find the last occurrence of UC in STR.  */
+/* Similar to strrchr(), wcsrchr().  */
+extern uint8_t *
+       u8_strrchr (const uint8_t *str, ucs4_t uc)
+       _UC_ATTRIBUTE_PURE;
+extern uint16_t *
+       u16_strrchr (const uint16_t *str, ucs4_t uc)
+       _UC_ATTRIBUTE_PURE;
+extern uint32_t *
+       u32_strrchr (const uint32_t *str, ucs4_t uc)
+       _UC_ATTRIBUTE_PURE;
+
+/* Return the length of the initial segment of STR which consists entirely
+   of Unicode characters not in REJECT.  */
+/* Similar to strcspn(), wcscspn().  */
+extern size_t
+       u8_strcspn (const uint8_t *str, const uint8_t *reject)
+       _UC_ATTRIBUTE_PURE;
+extern size_t
+       u16_strcspn (const uint16_t *str, const uint16_t *reject)
+       _UC_ATTRIBUTE_PURE;
+extern size_t
+       u32_strcspn (const uint32_t *str, const uint32_t *reject)
+       _UC_ATTRIBUTE_PURE;
+
+/* Return the length of the initial segment of STR which consists entirely
+   of Unicode characters in ACCEPT.  */
+/* Similar to strspn(), wcsspn().  */
+extern size_t
+       u8_strspn (const uint8_t *str, const uint8_t *accept)
+       _UC_ATTRIBUTE_PURE;
+extern size_t
+       u16_strspn (const uint16_t *str, const uint16_t *accept)
+       _UC_ATTRIBUTE_PURE;
+extern size_t
+       u32_strspn (const uint32_t *str, const uint32_t *accept)
+       _UC_ATTRIBUTE_PURE;
+
+/* Find the first occurrence in STR of any character in ACCEPT.  */
+/* Similar to strpbrk(), wcspbrk().  */
+extern uint8_t *
+       u8_strpbrk (const uint8_t *str, const uint8_t *accept)
+       _UC_ATTRIBUTE_PURE;
+extern uint16_t *
+       u16_strpbrk (const uint16_t *str, const uint16_t *accept)
+       _UC_ATTRIBUTE_PURE;
+extern uint32_t *
+       u32_strpbrk (const uint32_t *str, const uint32_t *accept)
+       _UC_ATTRIBUTE_PURE;
+
+/* Find the first occurrence of NEEDLE in HAYSTACK.  */
+/* Similar to strstr(), wcsstr().  */
+extern uint8_t *
+       u8_strstr (const uint8_t *haystack, const uint8_t *needle)
+       _UC_ATTRIBUTE_PURE;
+extern uint16_t *
+       u16_strstr (const uint16_t *haystack, const uint16_t *needle)
+       _UC_ATTRIBUTE_PURE;
+extern uint32_t *
+       u32_strstr (const uint32_t *haystack, const uint32_t *needle)
+       _UC_ATTRIBUTE_PURE;
+
+/* Test whether STR starts with PREFIX.  */
+extern bool
+       u8_startswith (const uint8_t *str, const uint8_t *prefix)
+       _UC_ATTRIBUTE_PURE;
+extern bool
+       u16_startswith (const uint16_t *str, const uint16_t *prefix)
+       _UC_ATTRIBUTE_PURE;
+extern bool
+       u32_startswith (const uint32_t *str, const uint32_t *prefix)
+       _UC_ATTRIBUTE_PURE;
+
+/* Test whether STR ends with SUFFIX.  */
+extern bool
+       u8_endswith (const uint8_t *str, const uint8_t *suffix)
+       _UC_ATTRIBUTE_PURE;
+extern bool
+       u16_endswith (const uint16_t *str, const uint16_t *suffix)
+       _UC_ATTRIBUTE_PURE;
+extern bool
+       u32_endswith (const uint32_t *str, const uint32_t *suffix)
+       _UC_ATTRIBUTE_PURE;
+
+/* Divide STR into tokens separated by characters in DELIM.
+   This interface is actually more similar to wcstok than to strtok.  */
+/* Similar to strtok_r(), wcstok().  */
+extern uint8_t *
+       u8_strtok (uint8_t *_UC_RESTRICT str, const uint8_t *delim,
+                  uint8_t **ptr);
+extern uint16_t *
+       u16_strtok (uint16_t *_UC_RESTRICT str, const uint16_t *delim,
+                   uint16_t **ptr);
+extern uint32_t *
+       u32_strtok (uint32_t *_UC_RESTRICT str, const uint32_t *delim,
+                   uint32_t **ptr);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _UNISTR_H */
diff --git a/src/grep/lib/unistr/u8-mbtoucr.c b/src/grep/lib/unistr/u8-mbtoucr.c
new file mode 100644
index 0000000..77a6cac
--- /dev/null
+++ b/src/grep/lib/unistr/u8-mbtoucr.c
@@ -0,0 +1,142 @@
+/* Look at first character in UTF-8 string, returning an error code.
+   Copyright (C) 1999-2002, 2006-2007, 2009-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2001.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "unistr.h"
+
+int
+u8_mbtoucr (ucs4_t *puc, const uint8_t *s, size_t n)
+{
+  uint8_t c = *s;
+
+  if (c < 0x80)
+    {
+      *puc = c;
+      return 1;
+    }
+  else if (c >= 0xc2)
+    {
+      if (c < 0xe0)
+        {
+          if (n >= 2)
+            {
+              if ((s[1] ^ 0x80) < 0x40)
+                {
+                  *puc = ((unsigned int) (c & 0x1f) << 6)
+                         | (unsigned int) (s[1] ^ 0x80);
+                  return 2;
+                }
+              /* invalid multibyte character */
+            }
+          else
+            {
+              /* incomplete multibyte character */
+              *puc = 0xfffd;
+              return -2;
+            }
+        }
+      else if (c < 0xf0)
+        {
+          if (n >= 2)
+            {
+              if ((s[1] ^ 0x80) < 0x40
+                  && (c >= 0xe1 || s[1] >= 0xa0)
+                  && (c != 0xed || s[1] < 0xa0))
+                {
+                  if (n >= 3)
+                    {
+                      if ((s[2] ^ 0x80) < 0x40)
+                        {
+                          *puc = ((unsigned int) (c & 0x0f) << 12)
+                                 | ((unsigned int) (s[1] ^ 0x80) << 6)
+                                 | (unsigned int) (s[2] ^ 0x80);
+                          return 3;
+                        }
+                      /* invalid multibyte character */
+                    }
+                  else
+                    {
+                      /* incomplete multibyte character */
+                      *puc = 0xfffd;
+                      return -2;
+                    }
+                }
+              /* invalid multibyte character */
+            }
+          else
+            {
+              /* incomplete multibyte character */
+              *puc = 0xfffd;
+              return -2;
+            }
+        }
+      else if (c < 0xf8)
+        {
+          if (n >= 2)
+            {
+              if ((s[1] ^ 0x80) < 0x40
+                  && (c >= 0xf1 || s[1] >= 0x90)
+                  && (c < 0xf4 || (c == 0xf4 && s[1] < 0x90)))
+                {
+                  if (n >= 3)
+                    {
+                      if ((s[2] ^ 0x80) < 0x40)
+                        {
+                          if (n >= 4)
+                            {
+                              if ((s[3] ^ 0x80) < 0x40)
+                                {
+                                  *puc = ((unsigned int) (c & 0x07) << 18)
+                                         | ((unsigned int) (s[1] ^ 0x80) << 12)
+                                         | ((unsigned int) (s[2] ^ 0x80) << 6)
+                                         | (unsigned int) (s[3] ^ 0x80);
+                                  return 4;
+                                }
+                              /* invalid multibyte character */
+                            }
+                          else
+                            {
+                              /* incomplete multibyte character */
+                              *puc = 0xfffd;
+                              return -2;
+                            }
+                        }
+                      /* invalid multibyte character */
+                    }
+                  else
+                    {
+                      /* incomplete multibyte character */
+                      *puc = 0xfffd;
+                      return -2;
+                    }
+                }
+              /* invalid multibyte character */
+            }
+          else
+            {
+              /* incomplete multibyte character */
+              *puc = 0xfffd;
+              return -2;
+            }
+        }
+    }
+  /* invalid multibyte character */
+  *puc = 0xfffd;
+  return -1;
+}
diff --git a/src/grep/lib/unistr/u8-uctomb-aux.c b/src/grep/lib/unistr/u8-uctomb-aux.c
new file mode 100644
index 0000000..2be1cfb
--- /dev/null
+++ b/src/grep/lib/unistr/u8-uctomb-aux.c
@@ -0,0 +1,60 @@
+/* Conversion UCS-4 to UTF-8.
+   Copyright (C) 2002, 2006-2007, 2009-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "unistr.h"
+
+#include "attribute.h"
+
+int
+u8_uctomb_aux (uint8_t *s, ucs4_t uc, ptrdiff_t n)
+{
+  int count;
+
+  if (uc < 0x80)
+    /* The case n >= 1 is already handled by the caller.  */
+    return -2;
+  else if (uc < 0x800)
+    count = 2;
+  else if (uc < 0x10000)
+    {
+      if (uc < 0xd800 || uc >= 0xe000)
+        count = 3;
+      else
+        return -1;
+    }
+  else if (uc < 0x110000)
+    count = 4;
+  else
+    return -1;
+
+  if (n < count)
+    return -2;
+
+  switch (count) /* note: code falls through cases! */
+    {
+    case 4: s[3] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x10000;
+      FALLTHROUGH;
+    case 3: s[2] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x800;
+      FALLTHROUGH;
+    case 2: s[1] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0xc0;
+  /*case 1:*/ s[0] = uc;
+    }
+  return count;
+}
diff --git a/src/grep/lib/unistr/u8-uctomb.c b/src/grep/lib/unistr/u8-uctomb.c
new file mode 100644
index 0000000..e2577c6
--- /dev/null
+++ b/src/grep/lib/unistr/u8-uctomb.c
@@ -0,0 +1,79 @@
+/* Store a character in UTF-8 string.
+   Copyright (C) 2002, 2005-2006, 2009-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#if defined IN_LIBUNISTRING
+/* Tell unistr.h to declare u8_uctomb as 'extern', not 'static inline'.  */
+# include "unistring-notinline.h"
+#endif
+
+/* Specification.  */
+#include "unistr.h"
+
+#include "attribute.h"
+
+#if !HAVE_INLINE
+
+int
+u8_uctomb (uint8_t *s, ucs4_t uc, ptrdiff_t n)
+{
+  if (uc < 0x80)
+    {
+      if (n > 0)
+        {
+          s[0] = uc;
+          return 1;
+        }
+      /* else return -2, below.  */
+    }
+  else
+    {
+      int count;
+
+      if (uc < 0x800)
+        count = 2;
+      else if (uc < 0x10000)
+        {
+          if (uc < 0xd800 || uc >= 0xe000)
+            count = 3;
+          else
+            return -1;
+        }
+      else if (uc < 0x110000)
+        count = 4;
+      else
+        return -1;
+
+      if (n >= count)
+        {
+          switch (count) /* note: code falls through cases! */
+            {
+            case 4: s[3] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x10000;
+              FALLTHROUGH;
+            case 3: s[2] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x800;
+              FALLTHROUGH;
+            case 2: s[1] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0xc0;
+          /*case 1:*/ s[0] = uc;
+            }
+          return count;
+        }
+    }
+  return -2;
+}
+
+#endif
diff --git a/src/grep/lib/unitypes.in.h b/src/grep/lib/unitypes.in.h
new file mode 100644
index 0000000..82ee0de
--- /dev/null
+++ b/src/grep/lib/unitypes.in.h
@@ -0,0 +1,61 @@
+/* Elementary types and macros for the GNU UniString library.
+   Copyright (C) 2002, 2005-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _UNITYPES_H
+#define _UNITYPES_H
+
+/* Get uint8_t, uint16_t, uint32_t.  */
+#include <stdint.h>
+
+/* Type representing a Unicode character.  */
+typedef uint32_t ucs4_t;
+
+/* Attribute of a function whose result depends only on the arguments
+   (not pointers!) and which has no side effects.  */
+#ifndef _UC_ATTRIBUTE_CONST
+# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95) || defined __clang__
+#  define _UC_ATTRIBUTE_CONST __attribute__ ((__const__))
+# else
+#  define _UC_ATTRIBUTE_CONST
+# endif
+#endif
+
+/* Attribute of a function whose result depends only on the arguments
+   (possibly pointers) and global memory, and which has no side effects.  */
+#ifndef _UC_ATTRIBUTE_PURE
+# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96) || defined __clang__
+#  define _UC_ATTRIBUTE_PURE __attribute__ ((__pure__))
+# else
+#  define _UC_ATTRIBUTE_PURE
+# endif
+#endif
+
+/* Qualifier in a function declaration, that asserts that the caller must
+   pass a pointer to a different object in the specified pointer argument
+   than in the other pointer arguments.  */
+#ifndef _UC_RESTRICT
+# if defined __restrict \
+     || 2 < __GNUC__ + (95 <= __GNUC_MINOR__) \
+     || __clang_major__ >= 3
+#  define _UC_RESTRICT __restrict
+# elif 199901L <= __STDC_VERSION__ || defined restrict
+#  define _UC_RESTRICT restrict
+# else
+#  define _UC_RESTRICT
+# endif
+#endif
+
+#endif /* _UNITYPES_H */
diff --git a/src/grep/lib/uniwidth.in.h b/src/grep/lib/uniwidth.in.h
new file mode 100644
index 0000000..0859254
--- /dev/null
+++ b/src/grep/lib/uniwidth.in.h
@@ -0,0 +1,72 @@
+/* Display width functions.
+   Copyright (C) 2001-2002, 2005, 2007, 2009-2021 Free Software Foundation,
+   Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _UNIWIDTH_H
+#define _UNIWIDTH_H
+
+#include "unitypes.h"
+
+/* Get size_t.  */
+#include <stddef.h>
+
+/* Get locale_charset() declaration.  */
+#include "localcharset.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Display width.  */
+
+/* These functions are locale dependent.  The encoding argument identifies
+   the encoding (e.g. "ISO-8859-2" for Polish).  */
+
+/* Determine number of column positions required for UC.  */
+extern int
+       uc_width (ucs4_t uc, const char *encoding)
+       _UC_ATTRIBUTE_PURE;
+
+/* Determine number of column positions required for first N units
+   (or fewer if S ends before this) in S.  */
+extern int
+       u8_width (const uint8_t *s, size_t n, const char *encoding)
+       _UC_ATTRIBUTE_PURE;
+extern int
+       u16_width (const uint16_t *s, size_t n, const char *encoding)
+       _UC_ATTRIBUTE_PURE;
+extern int
+       u32_width (const uint32_t *s, size_t n, const char *encoding)
+       _UC_ATTRIBUTE_PURE;
+
+/* Determine number of column positions required for S.  */
+extern int
+       u8_strwidth (const uint8_t *s, const char *encoding)
+       _UC_ATTRIBUTE_PURE;
+extern int
+       u16_strwidth (const uint16_t *s, const char *encoding)
+       _UC_ATTRIBUTE_PURE;
+extern int
+       u32_strwidth (const uint32_t *s, const char *encoding)
+       _UC_ATTRIBUTE_PURE;
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _UNIWIDTH_H */
diff --git a/src/grep/lib/uniwidth/cjk.h b/src/grep/lib/uniwidth/cjk.h
new file mode 100644
index 0000000..1853ceb
--- /dev/null
+++ b/src/grep/lib/uniwidth/cjk.h
@@ -0,0 +1,37 @@
+/* Test for CJK encoding.
+   Copyright (C) 2001-2002, 2005-2007, 2009-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include "streq.h"
+
+static int
+is_cjk_encoding (const char *encoding)
+{
+  if (0
+      /* Legacy Japanese encodings */
+      || STREQ_OPT (encoding, "EUC-JP", 'E', 'U', 'C', '-', 'J', 'P', 0, 0, 0)
+      /* Legacy Chinese encodings */
+      || STREQ_OPT (encoding, "GB2312", 'G', 'B', '2', '3', '1', '2', 0, 0, 0)
+      || STREQ_OPT (encoding, "GBK", 'G', 'B', 'K', 0, 0, 0, 0, 0, 0)
+      || STREQ_OPT (encoding, "EUC-TW", 'E', 'U', 'C', '-', 'T', 'W', 0, 0, 0)
+      || STREQ_OPT (encoding, "BIG5", 'B', 'I', 'G', '5', 0, 0, 0, 0, 0)
+      /* Legacy Korean encodings */
+      || STREQ_OPT (encoding, "EUC-KR", 'E', 'U', 'C', '-', 'K', 'R', 0, 0, 0)
+      || STREQ_OPT (encoding, "CP949", 'C', 'P', '9', '4', '9', 0, 0, 0, 0)
+      || STREQ_OPT (encoding, "JOHAB", 'J', 'O', 'H', 'A', 'B', 0, 0, 0, 0))
+    return 1;
+  return 0;
+}
diff --git a/src/grep/lib/uniwidth/width.c b/src/grep/lib/uniwidth/width.c
new file mode 100644
index 0000000..9ba07d3
--- /dev/null
+++ b/src/grep/lib/uniwidth/width.c
@@ -0,0 +1,468 @@
+/* Determine display width of Unicode character.
+   Copyright (C) 2001-2002, 2006-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "uniwidth.h"
+
+#include "cjk.h"
+
+/*
+ * Non-spacing attribute table.
+ * Consists of:
+ * - Non-spacing characters; generated from PropList.txt or
+ *   "grep '^[^;]*;[^;]*;[^;]*;[^;]*;NSM;' UnicodeData.txt"
+ * - Format control characters; generated from
+ *   "grep '^[^;]*;[^;]*;Cf;' UnicodeData.txt"
+ * - Zero width characters; generated from
+ *   "grep '^[^;]*;ZERO WIDTH ' UnicodeData.txt"
+ */
+static const unsigned char nonspacing_table_data[38*64] = {
+  /* 0x0000-0x01ff */
+  0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, /* 0x0000-0x003f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, /* 0x0040-0x007f */
+  0xff, 0xff, 0xff, 0xff, 0x00, 0x20, 0x00, 0x00, /* 0x0080-0x00bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00c0-0x00ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0100-0x013f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0140-0x017f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0180-0x01bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x01c0-0x01ff */
+  /* 0x0200-0x03ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0200-0x023f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0240-0x027f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0280-0x02bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x02c0-0x02ff */
+  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0x0300-0x033f */
+  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, /* 0x0340-0x037f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0380-0x03bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x03c0-0x03ff */
+  /* 0x0400-0x05ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0400-0x043f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0440-0x047f */
+  0xf8, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0480-0x04bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x04c0-0x04ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0500-0x053f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0540-0x057f */
+  0x00, 0x00, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xbf, /* 0x0580-0x05bf */
+  0xb6, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x05c0-0x05ff */
+  /* 0x0600-0x07ff */
+  0x3f, 0x00, 0xff, 0x17, 0x00, 0x00, 0x00, 0x00, /* 0x0600-0x063f */
+  0x00, 0xf8, 0xff, 0xff, 0x00, 0x00, 0x01, 0x00, /* 0x0640-0x067f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0680-0x06bf */
+  0x00, 0x00, 0xc0, 0xbf, 0x9f, 0x3d, 0x00, 0x00, /* 0x06c0-0x06ff */
+  0x00, 0x80, 0x02, 0x00, 0x00, 0x00, 0xff, 0xff, /* 0x0700-0x073f */
+  0xff, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0740-0x077f */
+  0x00, 0x00, 0x00, 0x00, 0xc0, 0xff, 0x01, 0x00, /* 0x0780-0x07bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x0f, 0x00, /* 0x07c0-0x07ff */
+  /* 0x0800-0x09ff */
+  0x00, 0x00, 0xc0, 0xfb, 0xef, 0x3e, 0x00, 0x00, /* 0x0800-0x083f */
+  0x00, 0x00, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x00, /* 0x0840-0x087f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0880-0x08bf */
+  0x00, 0x00, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0x08c0-0x08ff */
+  0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x14, /* 0x0900-0x093f */
+  0xfe, 0x21, 0xfe, 0x00, 0x0c, 0x00, 0x00, 0x00, /* 0x0940-0x097f */
+  0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, /* 0x0980-0x09bf */
+  0x1e, 0x20, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, /* 0x09c0-0x09ff */
+  /* 0x0a00-0x0bff */
+  0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, /* 0x0a00-0x0a3f */
+  0x86, 0x39, 0x02, 0x00, 0x00, 0x00, 0x23, 0x00, /* 0x0a40-0x0a7f */
+  0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, /* 0x0a80-0x0abf */
+  0xbe, 0x21, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, /* 0x0ac0-0x0aff */
+  0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x90, /* 0x0b00-0x0b3f */
+  0x1e, 0x20, 0x40, 0x00, 0x0c, 0x00, 0x00, 0x00, /* 0x0b40-0x0b7f */
+  0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0b80-0x0bbf */
+  0x01, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0bc0-0x0bff */
+  /* 0x0c00-0x0dff */
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, /* 0x0c00-0x0c3f */
+  0xc1, 0x3d, 0x60, 0x00, 0x0c, 0x00, 0x00, 0x00, /* 0x0c40-0x0c7f */
+  0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, /* 0x0c80-0x0cbf */
+  0x00, 0x30, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, /* 0x0cc0-0x0cff */
+  0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0d00-0x0d3f */
+  0x1e, 0x20, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, /* 0x0d40-0x0d7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0d80-0x0dbf */
+  0x00, 0x04, 0x5c, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0dc0-0x0dff */
+  /* 0x0e00-0x0fff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf2, 0x07, /* 0x0e00-0x0e3f */
+  0x80, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0e40-0x0e7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf2, 0x1b, /* 0x0e80-0x0ebf */
+  0x00, 0x3f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0ec0-0x0eff */
+  0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0xa0, 0x02, /* 0x0f00-0x0f3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x7f, /* 0x0f40-0x0f7f */
+  0xdf, 0xe0, 0xff, 0xfe, 0xff, 0xff, 0xff, 0x1f, /* 0x0f80-0x0fbf */
+  0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x0fc0-0x0fff */
+  /* 0x1000-0x11ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0xe0, 0xfd, 0x66, /* 0x1000-0x103f */
+  0x00, 0x00, 0x00, 0xc3, 0x01, 0x00, 0x1e, 0x00, /* 0x1040-0x107f */
+  0x64, 0x20, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, /* 0x1080-0x10bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10c0-0x10ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1100-0x113f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1140-0x117f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1180-0x11bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x11c0-0x11ff */
+  /* 0x1200-0x13ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1200-0x123f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1240-0x127f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1280-0x12bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x12c0-0x12ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1300-0x133f */
+  0x00, 0x00, 0x00, 0xe0, 0x00, 0x00, 0x00, 0x00, /* 0x1340-0x137f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1380-0x13bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x13c0-0x13ff */
+  /* 0x1600-0x17ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1600-0x163f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1640-0x167f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1680-0x16bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x16c0-0x16ff */
+  0x00, 0x00, 0x1c, 0x00, 0x00, 0x00, 0x1c, 0x00, /* 0x1700-0x173f */
+  0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x0c, 0x00, /* 0x1740-0x177f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xb0, 0x3f, /* 0x1780-0x17bf */
+  0x40, 0xfe, 0x0f, 0x20, 0x00, 0x00, 0x00, 0x00, /* 0x17c0-0x17ff */
+  /* 0x1800-0x19ff */
+  0x00, 0x78, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1800-0x183f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1840-0x187f */
+  0x60, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, /* 0x1880-0x18bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18c0-0x18ff */
+  0x00, 0x00, 0x00, 0x00, 0x87, 0x01, 0x04, 0x0e, /* 0x1900-0x193f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1940-0x197f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1980-0x19bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x19c0-0x19ff */
+  /* 0x1a00-0x1bff */
+  0x00, 0x00, 0x80, 0x09, 0x00, 0x00, 0x00, 0x00, /* 0x1a00-0x1a3f */
+  0x00, 0x00, 0x40, 0x7f, 0xe5, 0x1f, 0xf8, 0x9f, /* 0x1a40-0x1a7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x7f, /* 0x1a80-0x1abf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1ac0-0x1aff */
+  0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd0, 0x17, /* 0x1b00-0x1b3f */
+  0x04, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x0f, 0x00, /* 0x1b40-0x1b7f */
+  0x03, 0x00, 0x00, 0x00, 0x3c, 0x3b, 0x00, 0x00, /* 0x1b80-0x1bbf */
+  0x00, 0x00, 0x00, 0x00, 0x40, 0xa3, 0x03, 0x00, /* 0x1bc0-0x1bff */
+  /* 0x1c00-0x1dff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0xcf, 0x00, /* 0x1c00-0x1c3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1c40-0x1c7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1c80-0x1cbf */
+  0x00, 0x00, 0xf7, 0xff, 0xfd, 0x21, 0x10, 0x03, /* 0x1cc0-0x1cff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1d00-0x1d3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1d40-0x1d7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1d80-0x1dbf */
+  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xf8, /* 0x1dc0-0x1dff */
+  /* 0x2000-0x21ff */
+  0x00, 0xf8, 0x00, 0x00, 0x00, 0x7c, 0x00, 0x00, /* 0x2000-0x203f */
+  0x00, 0x00, 0x00, 0x00, 0xdf, 0xff, 0x00, 0x00, /* 0x2040-0x207f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x2080-0x20bf */
+  0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x01, 0x00, /* 0x20c0-0x20ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x2100-0x213f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x2140-0x217f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x2180-0x21bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x21c0-0x21ff */
+  /* 0x2c00-0x2dff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x2c00-0x2c3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x2c40-0x2c7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x2c80-0x2cbf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x03, 0x00, /* 0x2cc0-0x2cff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x2d00-0x2d3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, /* 0x2d40-0x2d7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x2d80-0x2dbf */
+  0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, /* 0x2dc0-0x2dff */
+  /* 0x3000-0x31ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x00, 0x00, /* 0x3000-0x303f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x3040-0x307f */
+  0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x00, /* 0x3080-0x30bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30c0-0x30ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x3100-0x313f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x3140-0x317f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x3180-0x31bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x31c0-0x31ff */
+  /* 0xa600-0xa7ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa600-0xa63f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xf7, 0x3f, /* 0xa640-0xa67f */
+  0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x00, /* 0xa680-0xa6bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, /* 0xa6c0-0xa6ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa700-0xa73f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa740-0xa77f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa780-0xa7bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa7c0-0xa7ff */
+  /* 0xa800-0xa9ff */
+  0x44, 0x08, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, /* 0xa800-0xa83f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa840-0xa87f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa880-0xa8bf */
+  0x30, 0x00, 0x00, 0x00, 0xff, 0xff, 0x03, 0x00, /* 0xa8c0-0xa8ff */
+  0x00, 0x00, 0x00, 0x00, 0xc0, 0x3f, 0x00, 0x00, /* 0xa900-0xa93f */
+  0x80, 0xff, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa940-0xa97f */
+  0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc8, 0x13, /* 0xa980-0xa9bf */
+  0x00, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, /* 0xa9c0-0xa9ff */
+  /* 0xaa00-0xabff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0x66, 0x00, /* 0xaa00-0xaa3f */
+  0x08, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, /* 0xaa40-0xaa7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x9d, 0xc1, /* 0xaa80-0xaabf */
+  0x02, 0x00, 0x00, 0x00, 0x00, 0x30, 0x40, 0x00, /* 0xaac0-0xaaff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xab00-0xab3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xab40-0xab7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xab80-0xabbf */
+  0x00, 0x00, 0x00, 0x00, 0x20, 0x21, 0x00, 0x00, /* 0xabc0-0xabff */
+  /* 0xfa00-0xfbff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xfa00-0xfa3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xfa40-0xfa7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xfa80-0xfabf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xfac0-0xfaff */
+  0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, /* 0xfb00-0xfb3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xfb40-0xfb7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xfb80-0xfbbf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xfbc0-0xfbff */
+  /* 0xfe00-0xffff */
+  0xff, 0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, /* 0xfe00-0xfe3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xfe40-0xfe7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xfe80-0xfebf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, /* 0xfec0-0xfeff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xff00-0xff3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xff40-0xff7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xff80-0xffbf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, /* 0xffc0-0xffff */
+  /* 0x10000-0x101ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10000-0x1003f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10040-0x1007f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10080-0x100bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x100c0-0x100ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10100-0x1013f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10140-0x1017f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10180-0x101bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, /* 0x101c0-0x101ff */
+  /* 0x10200-0x103ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10200-0x1023f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10240-0x1027f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10280-0x102bf */
+  0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, /* 0x102c0-0x102ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10300-0x1033f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0x07, /* 0x10340-0x1037f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10380-0x103bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x103c0-0x103ff */
+  /* 0x10a00-0x10bff */
+  0x6e, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x87, /* 0x10a00-0x10a3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10a40-0x10a7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10a80-0x10abf */
+  0x00, 0x00, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, /* 0x10ac0-0x10aff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10b00-0x10b3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10b40-0x10b7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10b80-0x10bbf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10bc0-0x10bff */
+  /* 0x11000-0x111ff */
+  0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, /* 0x11000-0x1103f */
+  0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, /* 0x11040-0x1107f */
+  0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x78, 0x26, /* 0x11080-0x110bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x110c0-0x110ff */
+  0x07, 0x00, 0x00, 0x00, 0x80, 0xef, 0x1f, 0x00, /* 0x11100-0x1113f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, /* 0x11140-0x1117f */
+  0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0x7f, /* 0x11180-0x111bf */
+  0x00, 0x1c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x111c0-0x111ff */
+  /* 0x11200-0x113ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xd3, 0x40, /* 0x11200-0x1123f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x11240-0x1127f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x11280-0x112bf */
+  0x00, 0x00, 0x00, 0x80, 0xf8, 0x07, 0x00, 0x00, /* 0x112c0-0x112ff */
+  0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, /* 0x11300-0x1133f */
+  0x01, 0x00, 0x00, 0x00, 0xc0, 0x1f, 0x1f, 0x00, /* 0x11340-0x1137f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x11380-0x113bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x113c0-0x113ff */
+  /* 0x11400-0x115ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, /* 0x11400-0x1143f */
+  0x5c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x11440-0x1147f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x85, /* 0x11480-0x114bf */
+  0x0d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x114c0-0x114ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x11500-0x1153f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x11540-0x1157f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0xb0, /* 0x11580-0x115bf */
+  0x01, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00, 0x00, /* 0x115c0-0x115ff */
+  /* 0x11600-0x117ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0xa7, /* 0x11600-0x1163f */
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x11640-0x1167f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x28, 0xbf, 0x00, /* 0x11680-0x116bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x116c0-0x116ff */
+  0x00, 0x00, 0x00, 0xe0, 0xbc, 0x0f, 0x00, 0x00, /* 0x11700-0x1173f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x11740-0x1177f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x11780-0x117bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x117c0-0x117ff */
+  /* 0x11c00-0x11dff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0x3f, /* 0x11c00-0x11c3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x11c40-0x11c7f */
+  0x00, 0x00, 0xfc, 0xff, 0xff, 0xfc, 0x6d, 0x00, /* 0x11c80-0x11cbf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x11cc0-0x11cff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x11d00-0x11d3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x11d40-0x11d7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x11d80-0x11dbf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x11dc0-0x11dff */
+  /* 0x16a00-0x16bff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x16a00-0x16a3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x16a40-0x16a7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x16a80-0x16abf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0x00, /* 0x16ac0-0x16aff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0x00, /* 0x16b00-0x16b3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x16b40-0x16b7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x16b80-0x16bbf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x16bc0-0x16bff */
+  /* 0x16e00-0x16fff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x16e00-0x16e3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x16e40-0x16e7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x16e80-0x16ebf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x16ec0-0x16eff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x16f00-0x16f3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x16f40-0x16f7f */
+  0x00, 0x80, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x16f80-0x16fbf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x16fc0-0x16fff */
+  /* 0x1bc00-0x1bdff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1bc00-0x1bc3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1bc40-0x1bc7f */
+  0x00, 0x00, 0x00, 0x60, 0x0f, 0x00, 0x00, 0x00, /* 0x1bc80-0x1bcbf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1bcc0-0x1bcff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1bd00-0x1bd3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1bd40-0x1bd7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1bd80-0x1bdbf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1bdc0-0x1bdff */
+  /* 0x1d000-0x1d1ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1d000-0x1d03f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1d040-0x1d07f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1d080-0x1d0bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1d0c0-0x1d0ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1d100-0x1d13f */
+  0x00, 0x00, 0x00, 0x00, 0x80, 0x03, 0xf8, 0xff, /* 0x1d140-0x1d17f */
+  0xe7, 0x0f, 0x00, 0x00, 0x00, 0x3c, 0x00, 0x00, /* 0x1d180-0x1d1bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1d1c0-0x1d1ff */
+  /* 0x1d200-0x1d3ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1d200-0x1d23f */
+  0x1c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1d240-0x1d27f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1d280-0x1d2bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1d2c0-0x1d2ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1d300-0x1d33f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1d340-0x1d37f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1d380-0x1d3bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1d3c0-0x1d3ff */
+  /* 0x1da00-0x1dbff */
+  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xf8, /* 0x1da00-0x1da3f */
+  0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0x20, 0x00, /* 0x1da40-0x1da7f */
+  0x10, 0x00, 0x00, 0xf8, 0xfe, 0xff, 0x00, 0x00, /* 0x1da80-0x1dabf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1dac0-0x1daff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1db00-0x1db3f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1db40-0x1db7f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1db80-0x1dbbf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1dbc0-0x1dbff */
+  /* 0x1e000-0x1e1ff */
+  0x7f, 0xff, 0xff, 0xf9, 0xdb, 0x07, 0x00, 0x00, /* 0x1e000-0x1e03f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1e040-0x1e07f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1e080-0x1e0bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1e0c0-0x1e0ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1e100-0x1e13f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1e140-0x1e17f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1e180-0x1e1bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1e1c0-0x1e1ff */
+  /* 0x1e800-0x1e9ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1e800-0x1e83f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1e840-0x1e87f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1e880-0x1e8bf */
+  0x00, 0x00, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1e8c0-0x1e8ff */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1e900-0x1e93f */
+  0xf0, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1e940-0x1e97f */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x1e980-0x1e9bf */
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00  /* 0x1e9c0-0x1e9ff */
+};
+static const signed char nonspacing_table_ind[248] = {
+   0,  1,  2,  3,  4,  5,  6,  7, /* 0x0000-0x0fff */
+   8,  9, -1, 10, 11, 12, 13, -1, /* 0x1000-0x1fff */
+  14, -1, -1, -1, -1, -1, 15, -1, /* 0x2000-0x2fff */
+  16, -1, -1, -1, -1, -1, -1, -1, /* 0x3000-0x3fff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0x4000-0x4fff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0x5000-0x5fff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0x6000-0x6fff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0x7000-0x7fff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0x8000-0x8fff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0x9000-0x9fff */
+  -1, -1, -1, 17, 18, 19, -1, -1, /* 0xa000-0xafff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0xb000-0xbfff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0xc000-0xcfff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0xd000-0xdfff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0xe000-0xefff */
+  -1, -1, -1, -1, -1, 20, -1, 21, /* 0xf000-0xffff */
+  22, 23, -1, -1, -1, 24, -1, -1, /* 0x10000-0x10fff */
+  25, 26, 27, 28, -1, -1, 29, -1, /* 0x11000-0x11fff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0x12000-0x12fff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0x13000-0x13fff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0x14000-0x14fff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0x15000-0x15fff */
+  -1, -1, -1, -1, -1, 30, -1, 31, /* 0x16000-0x16fff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0x17000-0x17fff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0x18000-0x18fff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0x19000-0x19fff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0x1a000-0x1afff */
+  -1, -1, -1, -1, -1, -1, 32, -1, /* 0x1b000-0x1bfff */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* 0x1c000-0x1cfff */
+  33, 34, -1, -1, -1, 35, -1, -1, /* 0x1d000-0x1dfff */
+  36, -1, -1, -1, 37, -1, -1, -1  /* 0x1e000-0x1efff */
+};
+
+/* Determine number of column positions required for UC.  */
+int
+uc_width (ucs4_t uc, const char *encoding)
+{
+  /* Test for non-spacing or control character.  */
+  if ((uc >> 9) < 248)
+    {
+      int ind = nonspacing_table_ind[uc >> 9];
+      if (ind >= 0)
+        if ((nonspacing_table_data[64*ind + ((uc >> 3) & 63)] >> (uc & 7)) & 1)
+          {
+            if (uc > 0 && uc < 0xa0)
+              return -1;
+            else
+              return 0;
+          }
+    }
+  else if ((uc >> 9) == (0xe0000 >> 9))
+    {
+      if (uc >= 0xe0100)
+        {
+          if (uc <= 0xe01ef)
+            return 0;
+        }
+      else
+        {
+          if (uc >= 0xe0020 ? uc <= 0xe007f : uc == 0xe0001)
+            return 0;
+        }
+    }
+  /* Test for double-width character.
+   * Generated from "grep '^[^;]\{4,5\};[WF]' EastAsianWidth.txt"
+   * and            "grep '^[^;]\{4,5\};[^WF]' EastAsianWidth.txt"
+   */
+  if (uc >= 0x1100
+      && ((uc < 0x1160) /* Hangul Jamo */
+          || (uc >= 0x2329 && uc < 0x232b) /* Angle Brackets */
+          || (uc >= 0x2e80 && uc < 0xa4d0  /* CJK ... Yi */
+              && !(uc == 0x303f) && !(uc >= 0x4dc0 && uc < 0x4e00))
+          || (uc >= 0xac00 && uc < 0xd7a4) /* Hangul Syllables */
+          || (uc >= 0xf900 && uc < 0xfb00) /* CJK Compatibility Ideographs */
+          || (uc >= 0xfe10 && uc < 0xfe20) /* Presentation Forms for Vertical */
+          || (uc >= 0xfe30 && uc < 0xfe70) /* CJK Compatibility Forms */
+          || (uc >= 0xff00 && uc < 0xff61) /* Fullwidth Forms */
+          || (uc >= 0xffe0 && uc < 0xffe7) /* Fullwidth Signs */
+          || (uc >= 0x20000 && uc <= 0x2ffff) /* Supplementary Ideographic Plane */
+          || (uc >= 0x30000 && uc <= 0x3ffff) /* Tertiary Ideographic Plane */
+     )   )
+    return 2;
+  /* In ancient CJK encodings, Cyrillic and most other characters are
+     double-width as well.  */
+  if (uc >= 0x00A1 && uc < 0xFF61 && uc != 0x20A9
+      && is_cjk_encoding (encoding))
+    return 2;
+  return 1;
+}
diff --git a/src/grep/lib/unlocked-io.h b/src/grep/lib/unlocked-io.h
new file mode 100644
index 0000000..ca184b3
--- /dev/null
+++ b/src/grep/lib/unlocked-io.h
@@ -0,0 +1,136 @@
+/* Prefer faster, non-thread-safe stdio functions if available.
+
+   Copyright (C) 2001-2004, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering.  */
+
+#ifndef UNLOCKED_IO_H
+# define UNLOCKED_IO_H 1
+
+/* These are wrappers for functions/macros from the GNU C library, and
+   from other C libraries supporting POSIX's optional thread-safe functions.
+
+   The standard I/O functions are thread-safe.  These *_unlocked ones are
+   more efficient but not thread-safe.  That they're not thread-safe is
+   fine since all of the applications in this package are single threaded.
+
+   Also, some code that is shared with the GNU C library may invoke
+   the *_unlocked functions directly.  On hosts that lack those
+   functions, invoke the non-thread-safe versions instead.  */
+
+# include <stdio.h>
+
+# if HAVE_DECL_CLEARERR_UNLOCKED || defined clearerr_unlocked
+#  undef clearerr
+#  define clearerr(x) clearerr_unlocked (x)
+# else
+#  define clearerr_unlocked(x) clearerr (x)
+# endif
+
+# if HAVE_DECL_FEOF_UNLOCKED || defined feof_unlocked
+#  undef feof
+#  define feof(x) feof_unlocked (x)
+# else
+#  define feof_unlocked(x) feof (x)
+# endif
+
+# if HAVE_DECL_FERROR_UNLOCKED || defined ferror_unlocked
+#  undef ferror
+#  define ferror(x) ferror_unlocked (x)
+# else
+#  define ferror_unlocked(x) ferror (x)
+# endif
+
+# if HAVE_DECL_FFLUSH_UNLOCKED || defined fflush_unlocked
+#  undef fflush
+#  define fflush(x) fflush_unlocked (x)
+# else
+#  define fflush_unlocked(x) fflush (x)
+# endif
+
+# if HAVE_DECL_FGETS_UNLOCKED || defined fgets_unlocked
+#  undef fgets
+#  define fgets(x,y,z) fgets_unlocked (x,y,z)
+# else
+#  define fgets_unlocked(x,y,z) fgets (x,y,z)
+# endif
+
+# if HAVE_DECL_FPUTC_UNLOCKED || defined fputc_unlocked
+#  undef fputc
+#  define fputc(x,y) fputc_unlocked (x,y)
+# else
+#  define fputc_unlocked(x,y) fputc (x,y)
+# endif
+
+# if HAVE_DECL_FPUTS_UNLOCKED || defined fputs_unlocked
+#  undef fputs
+#  define fputs(x,y) fputs_unlocked (x,y)
+# else
+#  define fputs_unlocked(x,y) fputs (x,y)
+# endif
+
+# if HAVE_DECL_FREAD_UNLOCKED || defined fread_unlocked
+#  undef fread
+#  define fread(w,x,y,z) fread_unlocked (w,x,y,z)
+# else
+#  define fread_unlocked(w,x,y,z) fread (w,x,y,z)
+# endif
+
+# if HAVE_DECL_FWRITE_UNLOCKED || defined fwrite_unlocked
+#  undef fwrite
+#  define fwrite(w,x,y,z) fwrite_unlocked (w,x,y,z)
+# else
+#  define fwrite_unlocked(w,x,y,z) fwrite (w,x,y,z)
+# endif
+
+# if HAVE_DECL_GETC_UNLOCKED || defined get_unlocked
+#  undef getc
+#  define getc(x) getc_unlocked (x)
+# else
+#  define getc_unlocked(x) getc (x)
+# endif
+
+# if HAVE_DECL_GETCHAR_UNLOCKED || defined getchar_unlocked
+#  undef getchar
+#  define getchar() getchar_unlocked ()
+# else
+#  define getchar_unlocked() getchar ()
+# endif
+
+# if HAVE_DECL_PUTC_UNLOCKED || defined putc_unlocked
+#  undef putc
+#  define putc(x,y) putc_unlocked (x,y)
+# else
+#  define putc_unlocked(x,y) putc (x,y)
+# endif
+
+# if HAVE_DECL_PUTCHAR_UNLOCKED || defined putchar_unlocked
+#  undef putchar
+#  define putchar(x) putchar_unlocked (x)
+# else
+#  define putchar_unlocked(x) putchar (x)
+# endif
+
+# undef flockfile
+# define flockfile(x) ((void) 0)
+
+# undef ftrylockfile
+# define ftrylockfile(x) 0
+
+# undef funlockfile
+# define funlockfile(x) ((void) 0)
+
+#endif /* UNLOCKED_IO_H */
diff --git a/src/grep/lib/verify.h b/src/grep/lib/verify.h
new file mode 100644
index 0000000..a8ca59b
--- /dev/null
+++ b/src/grep/lib/verify.h
@@ -0,0 +1,315 @@
+/* Compile-time assert-like macros.
+
+   Copyright (C) 2005-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert, Bruno Haible, and Jim Meyering.  */
+
+#ifndef _GL_VERIFY_H
+#define _GL_VERIFY_H
+
+
+/* Define _GL_HAVE__STATIC_ASSERT to 1 if _Static_assert (R, DIAGNOSTIC)
+   works as per C11.  This is supported by GCC 4.6.0+ and by clang 4+.
+
+   Define _GL_HAVE__STATIC_ASSERT1 to 1 if _Static_assert (R) works as
+   per C2x.  This is supported by GCC 9.1+.
+
+   Support compilers claiming conformance to the relevant standard,
+   and also support GCC when not pedantic.  If we were willing to slow
+   'configure' down we could also use it with other compilers, but
+   since this affects only the quality of diagnostics, why bother?  */
+#ifndef __cplusplus
+# if (201112L <= __STDC_VERSION__ \
+      || (!defined __STRICT_ANSI__ \
+          && (4 < __GNUC__ + (6 <= __GNUC_MINOR__) || 4 <= __clang_major__)))
+#  define _GL_HAVE__STATIC_ASSERT 1
+# endif
+# if (202000L <= __STDC_VERSION__ \
+      || (!defined __STRICT_ANSI__ && 9 <= __GNUC__))
+#  define _GL_HAVE__STATIC_ASSERT1 1
+# endif
+#endif
+
+/* FreeBSD 9.1 <sys/cdefs.h>, included by <stddef.h> and lots of other
+   system headers, defines a conflicting _Static_assert that is no
+   better than ours; override it.  */
+#ifndef _GL_HAVE__STATIC_ASSERT
+# include <stddef.h>
+# undef _Static_assert
+#endif
+
+/* Each of these macros verifies that its argument R is nonzero.  To
+   be portable, R should be an integer constant expression.  Unlike
+   assert (R), there is no run-time overhead.
+
+   If _Static_assert works, verify (R) uses it directly.  Similarly,
+   _GL_VERIFY_TRUE works by packaging a _Static_assert inside a struct
+   that is an operand of sizeof.
+
+   The code below uses several ideas for C++ compilers, and for C
+   compilers that do not support _Static_assert:
+
+   * The first step is ((R) ? 1 : -1).  Given an expression R, of
+     integral or boolean or floating-point type, this yields an
+     expression of integral type, whose value is later verified to be
+     constant and nonnegative.
+
+   * Next this expression W is wrapped in a type
+     struct _gl_verify_type {
+       unsigned int _gl_verify_error_if_negative: W;
+     }.
+     If W is negative, this yields a compile-time error.  No compiler can
+     deal with a bit-field of negative size.
+
+     One might think that an array size check would have the same
+     effect, that is, that the type struct { unsigned int dummy[W]; }
+     would work as well.  However, inside a function, some compilers
+     (such as C++ compilers and GNU C) allow local parameters and
+     variables inside array size expressions.  With these compilers,
+     an array size check would not properly diagnose this misuse of
+     the verify macro:
+
+       void function (int n) { verify (n < 0); }
+
+   * For the verify macro, the struct _gl_verify_type will need to
+     somehow be embedded into a declaration.  To be portable, this
+     declaration must declare an object, a constant, a function, or a
+     typedef name.  If the declared entity uses the type directly,
+     such as in
+
+       struct dummy {...};
+       typedef struct {...} dummy;
+       extern struct {...} *dummy;
+       extern void dummy (struct {...} *);
+       extern struct {...} *dummy (void);
+
+     two uses of the verify macro would yield colliding declarations
+     if the entity names are not disambiguated.  A workaround is to
+     attach the current line number to the entity name:
+
+       #define _GL_CONCAT0(x, y) x##y
+       #define _GL_CONCAT(x, y) _GL_CONCAT0 (x, y)
+       extern struct {...} * _GL_CONCAT (dummy, __LINE__);
+
+     But this has the problem that two invocations of verify from
+     within the same macro would collide, since the __LINE__ value
+     would be the same for both invocations.  (The GCC __COUNTER__
+     macro solves this problem, but is not portable.)
+
+     A solution is to use the sizeof operator.  It yields a number,
+     getting rid of the identity of the type.  Declarations like
+
+       extern int dummy [sizeof (struct {...})];
+       extern void dummy (int [sizeof (struct {...})]);
+       extern int (*dummy (void)) [sizeof (struct {...})];
+
+     can be repeated.
+
+   * Should the implementation use a named struct or an unnamed struct?
+     Which of the following alternatives can be used?
+
+       extern int dummy [sizeof (struct {...})];
+       extern int dummy [sizeof (struct _gl_verify_type {...})];
+       extern void dummy (int [sizeof (struct {...})]);
+       extern void dummy (int [sizeof (struct _gl_verify_type {...})]);
+       extern int (*dummy (void)) [sizeof (struct {...})];
+       extern int (*dummy (void)) [sizeof (struct _gl_verify_type {...})];
+
+     In the second and sixth case, the struct type is exported to the
+     outer scope; two such declarations therefore collide.  GCC warns
+     about the first, third, and fourth cases.  So the only remaining
+     possibility is the fifth case:
+
+       extern int (*dummy (void)) [sizeof (struct {...})];
+
+   * GCC warns about duplicate declarations of the dummy function if
+     -Wredundant-decls is used.  GCC 4.3 and later have a builtin
+     __COUNTER__ macro that can let us generate unique identifiers for
+     each dummy function, to suppress this warning.
+
+   * This implementation exploits the fact that older versions of GCC,
+     which do not support _Static_assert, also do not warn about the
+     last declaration mentioned above.
+
+   * GCC warns if -Wnested-externs is enabled and 'verify' is used
+     within a function body; but inside a function, you can always
+     arrange to use verify_expr instead.
+
+   * In C++, any struct definition inside sizeof is invalid.
+     Use a template type to work around the problem.  */
+
+/* Concatenate two preprocessor tokens.  */
+#define _GL_CONCAT(x, y) _GL_CONCAT0 (x, y)
+#define _GL_CONCAT0(x, y) x##y
+
+/* _GL_COUNTER is an integer, preferably one that changes each time we
+   use it.  Use __COUNTER__ if it works, falling back on __LINE__
+   otherwise.  __LINE__ isn't perfect, but it's better than a
+   constant.  */
+#if defined __COUNTER__ && __COUNTER__ != __COUNTER__
+# define _GL_COUNTER __COUNTER__
+#else
+# define _GL_COUNTER __LINE__
+#endif
+
+/* Generate a symbol with the given prefix, making it unique if
+   possible.  */
+#define _GL_GENSYM(prefix) _GL_CONCAT (prefix, _GL_COUNTER)
+
+/* Verify requirement R at compile-time, as an integer constant expression
+   that returns 1.  If R is false, fail at compile-time, preferably
+   with a diagnostic that includes the string-literal DIAGNOSTIC.  */
+
+#define _GL_VERIFY_TRUE(R, DIAGNOSTIC) \
+   (!!sizeof (_GL_VERIFY_TYPE (R, DIAGNOSTIC)))
+
+#ifdef __cplusplus
+# if !GNULIB_defined_struct__gl_verify_type
+template <int w>
+  struct _gl_verify_type {
+    unsigned int _gl_verify_error_if_negative: w;
+  };
+#  define GNULIB_defined_struct__gl_verify_type 1
+# endif
+# define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \
+    _gl_verify_type<(R) ? 1 : -1>
+#elif defined _GL_HAVE__STATIC_ASSERT
+# define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \
+    struct {                                   \
+      _Static_assert (R, DIAGNOSTIC);          \
+      int _gl_dummy;                          \
+    }
+#else
+# define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \
+    struct { unsigned int _gl_verify_error_if_negative: (R) ? 1 : -1; }
+#endif
+
+/* Verify requirement R at compile-time, as a declaration without a
+   trailing ';'.  If R is false, fail at compile-time.
+
+   This macro requires three or more arguments but uses at most the first
+   two, so that the _Static_assert macro optionally defined below supports
+   both the C11 two-argument syntax and the C2x one-argument syntax.
+
+   Unfortunately, unlike C11, this implementation must appear as an
+   ordinary declaration, and cannot appear inside struct { ... }.  */
+
+#if 200410 <= __cpp_static_assert
+# define _GL_VERIFY(R, DIAGNOSTIC, ...) static_assert (R, DIAGNOSTIC)
+#elif defined _GL_HAVE__STATIC_ASSERT
+# define _GL_VERIFY(R, DIAGNOSTIC, ...) _Static_assert (R, DIAGNOSTIC)
+#else
+# define _GL_VERIFY(R, DIAGNOSTIC, ...)                                \
+    extern int (*_GL_GENSYM (_gl_verify_function) (void))	       \
+      [_GL_VERIFY_TRUE (R, DIAGNOSTIC)]
+#endif
+
+/* _GL_STATIC_ASSERT_H is defined if this code is copied into assert.h.  */
+#ifdef _GL_STATIC_ASSERT_H
+# if !defined _GL_HAVE__STATIC_ASSERT1 && !defined _Static_assert
+#  define _Static_assert(...) \
+     _GL_VERIFY (__VA_ARGS__, "static assertion failed", -)
+# endif
+# if __cpp_static_assert < 201411 && !defined static_assert
+#  define static_assert _Static_assert /* C11 requires this #define.  */
+# endif
+#endif
+
+/* @assert.h omit start@  */
+
+#if 3 < __GNUC__ + (3 < __GNUC_MINOR__ + (4 <= __GNUC_PATCHLEVEL__))
+# define _GL_HAS_BUILTIN_TRAP 1
+#elif defined __has_builtin
+# define _GL_HAS_BUILTIN_TRAP __has_builtin (__builtin_trap)
+#else
+# define _GL_HAS_BUILTIN_TRAP 0
+#endif
+
+#if 4 < __GNUC__ + (5 <= __GNUC_MINOR__)
+# define _GL_HAS_BUILTIN_UNREACHABLE 1
+#elif defined __has_builtin
+# define _GL_HAS_BUILTIN_UNREACHABLE __has_builtin (__builtin_unreachable)
+#else
+# define _GL_HAS_BUILTIN_UNREACHABLE 0
+#endif
+
+/* Each of these macros verifies that its argument R is nonzero.  To
+   be portable, R should be an integer constant expression.  Unlike
+   assert (R), there is no run-time overhead.
+
+   There are two macros, since no single macro can be used in all
+   contexts in C.  verify_expr (R, E) is for scalar contexts, including
+   integer constant expression contexts.  verify (R) is for declaration
+   contexts, e.g., the top level.  */
+
+/* Verify requirement R at compile-time.  Return the value of the
+   expression E.  */
+
+#define verify_expr(R, E) \
+   (_GL_VERIFY_TRUE (R, "verify_expr (" #R ", " #E ")") ? (E) : (E))
+
+/* Verify requirement R at compile-time, as a declaration without a
+   trailing ';'.  verify (R) acts like static_assert (R) except that
+   it is portable to C11/C++14 and earlier, it can issue better
+   diagnostics, and its name is shorter and may be more convenient.  */
+
+#ifdef __PGI
+/* PGI barfs if R is long.  */
+# define verify(R) _GL_VERIFY (R, "verify (...)", -)
+#else
+# define verify(R) _GL_VERIFY (R, "verify (" #R ")", -)
+#endif
+
+/* Assume that R always holds.  Behavior is undefined if R is false,
+   fails to evaluate, or has side effects.
+
+   'assume (R)' is a directive from the programmer telling the
+   compiler that R is true so the compiler needn't generate code to
+   test R.  This is why 'assume' is in verify.h: it's related to
+   static checking (in this case, static checking done by the
+   programmer), not dynamic checking.
+
+   'assume (R)' can affect compilation of all the code, not just code
+   that happens to be executed after the assume (R) is "executed".
+   For example, if the code mistakenly does 'assert (R); assume (R);'
+   the compiler is entitled to optimize away the 'assert (R)'.
+
+   Although assuming R can help a compiler generate better code or
+   diagnostics, performance can suffer if R uses hard-to-optimize
+   features such as function calls not inlined by the compiler.
+
+   Avoid Clang's __builtin_assume, as it breaks GNU Emacs master
+   as of 2020-08-23T21:09:49Z!eggert@cs.ucla.edu; see
+   <https://bugs.gnu.org/43152#71>.  It's not known whether this breakage
+   is a Clang bug or an Emacs bug; play it safe for now.  */
+
+#if _GL_HAS_BUILTIN_UNREACHABLE
+# define assume(R) ((R) ? (void) 0 : __builtin_unreachable ())
+#elif 1200 <= _MSC_VER
+# define assume(R) __assume (R)
+#elif (defined GCC_LINT || defined lint) && _GL_HAS_BUILTIN_TRAP
+  /* Doing it this way helps various packages when configured with
+     --enable-gcc-warnings, which compiles with -Dlint.  It's nicer
+     when 'assume' silences warnings even with older GCCs.  */
+# define assume(R) ((R) ? (void) 0 : __builtin_trap ())
+#else
+  /* Some tools grok NOTREACHED, e.g., Oracle Studio 12.6.  */
+# define assume(R) ((R) ? (void) 0 : /*NOTREACHED*/ (void) 0)
+#endif
+
+/* @assert.h omit end@  */
+
+#endif
diff --git a/src/grep/lib/version-etc-fsf.c b/src/grep/lib/version-etc-fsf.c
new file mode 100644
index 0000000..e27ab14
--- /dev/null
+++ b/src/grep/lib/version-etc-fsf.c
@@ -0,0 +1,30 @@
+/* Variable with FSF copyright information, for version-etc.
+   Copyright (C) 1999-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering. */
+
+#include <config.h>
+
+/* Specification.  */
+#include "version-etc.h"
+
+/* Default copyright goes to the FSF. */
+
+const char version_etc_copyright[] =
+  /* Do *not* mark this string for translation.  %s is a copyright
+     symbol suitable for this locale, and %d is the copyright
+     year.  */
+  "Copyright %s %d Free Software Foundation, Inc.";
diff --git a/src/grep/lib/version-etc.c b/src/grep/lib/version-etc.c
new file mode 100644
index 0000000..ce4ef45
--- /dev/null
+++ b/src/grep/lib/version-etc.c
@@ -0,0 +1,262 @@
+/* Print --version and bug-reporting information in a consistent format.
+   Copyright (C) 1999-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering. */
+
+#include <config.h>
+
+/* Specification.  */
+#include "version-etc.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+
+#if USE_UNLOCKED_IO
+# include "unlocked-io.h"
+#endif
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+/* If you use AM_INIT_AUTOMAKE's no-define option,
+   PACKAGE is not defined.  Use PACKAGE_TARNAME instead.  */
+#if ! defined PACKAGE && defined PACKAGE_TARNAME
+# define PACKAGE PACKAGE_TARNAME
+#endif
+
+enum { COPYRIGHT_YEAR = 2021 };
+
+/* The three functions below display the --version information the
+   standard way.
+
+   If COMMAND_NAME is NULL, the PACKAGE is assumed to be the name of
+   the program.  The formats are therefore:
+
+   PACKAGE VERSION
+
+   or
+
+   COMMAND_NAME (PACKAGE) VERSION.
+
+   The functions differ in the way they are passed author names. */
+
+/* Display the --version information the standard way.
+
+   Author names are given in the array AUTHORS. N_AUTHORS is the
+   number of elements in the array. */
+void
+version_etc_arn (FILE *stream,
+                 const char *command_name, const char *package,
+                 const char *version,
+                 const char * const * authors, size_t n_authors)
+{
+  if (command_name)
+    fprintf (stream, "%s (%s) %s\n", command_name, package, version);
+  else
+    fprintf (stream, "%s %s\n", package, version);
+
+#ifdef PACKAGE_PACKAGER
+# ifdef PACKAGE_PACKAGER_VERSION
+  fprintf (stream, _("Packaged by %s (%s)\n"), PACKAGE_PACKAGER,
+           PACKAGE_PACKAGER_VERSION);
+# else
+  fprintf (stream, _("Packaged by %s\n"), PACKAGE_PACKAGER);
+# endif
+#endif
+
+  /* TRANSLATORS: Translate "(C)" to the copyright symbol
+     (C-in-a-circle), if this symbol is available in the user's
+     locale.  Otherwise, do not translate "(C)"; leave it as-is.  */
+  fprintf (stream, version_etc_copyright, _("(C)"), COPYRIGHT_YEAR);
+
+  fputs ("\n", stream);
+
+  /* TRANSLATORS: The %s placeholder is the web address of the GPL license.  */
+  fprintf (stream, _("\
+License GPLv3+: GNU GPL version 3 or later <%s>.\n\
+This is free software: you are free to change and redistribute it.\n\
+There is NO WARRANTY, to the extent permitted by law.\n\
+"),
+           "https://gnu.org/licenses/gpl.html");
+
+  fputs ("\n", stream);
+
+  switch (n_authors)
+    {
+    case 0:
+      /* No authors are given.  The caller should output authorship
+         info after calling this function.  */
+      break;
+    case 1:
+      /* TRANSLATORS: %s denotes an author name.  */
+      fprintf (stream, _("Written by %s.\n"), authors[0]);
+      break;
+    case 2:
+      /* TRANSLATORS: Each %s denotes an author name.  */
+      fprintf (stream, _("Written by %s and %s.\n"), authors[0], authors[1]);
+      break;
+    case 3:
+      /* TRANSLATORS: Each %s denotes an author name.  */
+      fprintf (stream, _("Written by %s, %s, and %s.\n"),
+               authors[0], authors[1], authors[2]);
+      break;
+    case 4:
+      /* TRANSLATORS: Each %s denotes an author name.
+         You can use line breaks, estimating that each author name occupies
+         ca. 16 screen columns and that a screen line has ca. 80 columns.  */
+      fprintf (stream, _("Written by %s, %s, %s,\nand %s.\n"),
+               authors[0], authors[1], authors[2], authors[3]);
+      break;
+    case 5:
+      /* TRANSLATORS: Each %s denotes an author name.
+         You can use line breaks, estimating that each author name occupies
+         ca. 16 screen columns and that a screen line has ca. 80 columns.  */
+      fprintf (stream, _("Written by %s, %s, %s,\n%s, and %s.\n"),
+               authors[0], authors[1], authors[2], authors[3], authors[4]);
+      break;
+    case 6:
+      /* TRANSLATORS: Each %s denotes an author name.
+         You can use line breaks, estimating that each author name occupies
+         ca. 16 screen columns and that a screen line has ca. 80 columns.  */
+      fprintf (stream, _("Written by %s, %s, %s,\n%s, %s, and %s.\n"),
+               authors[0], authors[1], authors[2], authors[3], authors[4],
+               authors[5]);
+      break;
+    case 7:
+      /* TRANSLATORS: Each %s denotes an author name.
+         You can use line breaks, estimating that each author name occupies
+         ca. 16 screen columns and that a screen line has ca. 80 columns.  */
+      fprintf (stream, _("Written by %s, %s, %s,\n%s, %s, %s, and %s.\n"),
+               authors[0], authors[1], authors[2], authors[3], authors[4],
+               authors[5], authors[6]);
+      break;
+    case 8:
+      /* TRANSLATORS: Each %s denotes an author name.
+         You can use line breaks, estimating that each author name occupies
+         ca. 16 screen columns and that a screen line has ca. 80 columns.  */
+      fprintf (stream, _("\
+Written by %s, %s, %s,\n%s, %s, %s, %s,\nand %s.\n"),
+                authors[0], authors[1], authors[2], authors[3], authors[4],
+                authors[5], authors[6], authors[7]);
+      break;
+    case 9:
+      /* TRANSLATORS: Each %s denotes an author name.
+         You can use line breaks, estimating that each author name occupies
+         ca. 16 screen columns and that a screen line has ca. 80 columns.  */
+      fprintf (stream, _("\
+Written by %s, %s, %s,\n%s, %s, %s, %s,\n%s, and %s.\n"),
+               authors[0], authors[1], authors[2], authors[3], authors[4],
+               authors[5], authors[6], authors[7], authors[8]);
+      break;
+    default:
+      /* 10 or more authors.  Use an abbreviation, since the human reader
+         will probably not want to read the entire list anyway.  */
+      /* TRANSLATORS: Each %s denotes an author name.
+         You can use line breaks, estimating that each author name occupies
+         ca. 16 screen columns and that a screen line has ca. 80 columns.  */
+      fprintf (stream, _("\
+Written by %s, %s, %s,\n%s, %s, %s, %s,\n%s, %s, and others.\n"),
+                authors[0], authors[1], authors[2], authors[3], authors[4],
+                authors[5], authors[6], authors[7], authors[8]);
+      break;
+    }
+}
+
+/* Display the --version information the standard way.  See the initial
+   comment to this module, for more information.
+
+   Author names are given in the NULL-terminated array AUTHORS. */
+void
+version_etc_ar (FILE *stream,
+                const char *command_name, const char *package,
+                const char *version, const char * const * authors)
+{
+  size_t n_authors;
+
+  for (n_authors = 0; authors[n_authors]; n_authors++)
+    ;
+  version_etc_arn (stream, command_name, package, version, authors, n_authors);
+}
+
+/* Display the --version information the standard way.  See the initial
+   comment to this module, for more information.
+
+   Author names are given in the NULL-terminated va_list AUTHORS. */
+void
+version_etc_va (FILE *stream,
+                const char *command_name, const char *package,
+                const char *version, va_list authors)
+{
+  size_t n_authors;
+  const char *authtab[10];
+
+  for (n_authors = 0;
+       n_authors < 10
+         && (authtab[n_authors] = va_arg (authors, const char *)) != NULL;
+       n_authors++)
+    ;
+  version_etc_arn (stream, command_name, package, version,
+                   authtab, n_authors);
+}
+
+
+/* Display the --version information the standard way.
+
+   If COMMAND_NAME is NULL, the PACKAGE is assumed to be the name of
+   the program.  The formats are therefore:
+
+   PACKAGE VERSION
+
+   or
+
+   COMMAND_NAME (PACKAGE) VERSION.
+
+   The authors names are passed as separate arguments, with an additional
+   NULL argument at the end.  */
+void
+version_etc (FILE *stream,
+             const char *command_name, const char *package,
+             const char *version, /* const char *author1, ...*/ ...)
+{
+  va_list authors;
+
+  va_start (authors, version);
+  version_etc_va (stream, command_name, package, version, authors);
+  va_end (authors);
+}
+
+void
+emit_bug_reporting_address (void)
+{
+  fputs ("\n", stdout);
+  /* TRANSLATORS: The placeholder indicates the bug-reporting address
+     for this package.  Please add _another line_ saying
+     "Report translation bugs to <...>\n" with the address for translation
+     bugs (typically your translation team's web or email address).  */
+  printf (_("Report bugs to: %s\n"), PACKAGE_BUGREPORT);
+#ifdef PACKAGE_PACKAGER_BUG_REPORTS
+  printf (_("Report %s bugs to: %s\n"), PACKAGE_PACKAGER,
+          PACKAGE_PACKAGER_BUG_REPORTS);
+#endif
+#ifdef PACKAGE_URL
+  printf (_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
+#else
+  printf (_("%s home page: <%s>\n"),
+          PACKAGE_NAME, "https://www.gnu.org/software/" PACKAGE "/");
+#endif
+  printf (_("General help using GNU software: <%s>\n"),
+          "https://www.gnu.org/gethelp/");
+}
diff --git a/src/grep/lib/version-etc.h b/src/grep/lib/version-etc.h
new file mode 100644
index 0000000..3f04732
--- /dev/null
+++ b/src/grep/lib/version-etc.h
@@ -0,0 +1,69 @@
+/* Print --version and bug-reporting information in a consistent format.
+   Copyright (C) 1999, 2003, 2005, 2009-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering. */
+
+#ifndef VERSION_ETC_H
+# define VERSION_ETC_H 1
+
+# include <stdarg.h>
+# include <stdio.h>
+
+extern const char version_etc_copyright[];
+
+/* The three functions below display the --version information in the
+   standard way: command and package names, package version, followed
+   by a short GPLv3+ notice and a list of up to 10 author names.
+
+   If COMMAND_NAME is NULL, the PACKAGE is assumed to be the name of
+   the program.  The formats are therefore:
+
+   PACKAGE VERSION
+
+   or
+
+   COMMAND_NAME (PACKAGE) VERSION.
+
+   The functions differ in the way they are passed author names: */
+
+/* N_AUTHORS names are supplied in array AUTHORS.  */
+extern void version_etc_arn (FILE *stream,
+                             const char *command_name, const char *package,
+                             const char *version,
+                             const char * const * authors, size_t n_authors);
+
+/* Names are passed in the NULL-terminated array AUTHORS.  */
+extern void version_etc_ar (FILE *stream,
+                            const char *command_name, const char *package,
+                            const char *version, const char * const * authors);
+
+/* Names are passed in the NULL-terminated va_list.  */
+extern void version_etc_va (FILE *stream,
+                            const char *command_name, const char *package,
+                            const char *version, va_list authors);
+
+/* Names are passed as separate arguments, with an additional
+   NULL argument at the end.  */
+extern void version_etc (FILE *stream,
+                         const char *command_name, const char *package,
+                         const char *version,
+                         /* const char *author1, ..., NULL */ ...)
+  _GL_ATTRIBUTE_SENTINEL ((0));
+
+/* Display the usual "Report bugs to" stanza.  */
+extern void emit_bug_reporting_address (void);
+
+#endif /* VERSION_ETC_H */
diff --git a/src/grep/lib/w32-initialize-main.c b/src/grep/lib/w32-initialize-main.c
new file mode 100644
index 0000000..a7eaedd
--- /dev/null
+++ b/src/grep/lib/w32-initialize-main.c
@@ -0,0 +1,17 @@
+
+
+
+#include "config.h"
+#include <corecrt_startup.h>
+
+
+void w32_initialize_main(int *pcArgs, char ***ppapszArgs)
+{
+    if (!getenv("KMK_GREP_NO_EXPANSION"))
+    {
+        _configure_narrow_argv(_crt_argv_expanded_arguments);
+        *pcArgs = __argc;
+        *ppapszArgs = __argv;
+    }
+}
+
diff --git a/src/grep/lib/warn-on-use.h b/src/grep/lib/warn-on-use.h
new file mode 100644
index 0000000..612937a
--- /dev/null
+++ b/src/grep/lib/warn-on-use.h
@@ -0,0 +1,149 @@
+/* A C macro for emitting warnings if a function is used.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as published
+   by the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* _GL_WARN_ON_USE (function, "literal string") issues a declaration
+   for FUNCTION which will then trigger a compiler warning containing
+   the text of "literal string" anywhere that function is called, if
+   supported by the compiler.  If the compiler does not support this
+   feature, the macro expands to an unused extern declaration.
+
+   _GL_WARN_ON_USE_ATTRIBUTE ("literal string") expands to the
+   attribute used in _GL_WARN_ON_USE.  If the compiler does not support
+   this feature, it expands to empty.
+
+   These macros are useful for marking a function as a potential
+   portability trap, with the intent that "literal string" include
+   instructions on the replacement function that should be used
+   instead.
+   _GL_WARN_ON_USE is for functions with 'extern' linkage.
+   _GL_WARN_ON_USE_ATTRIBUTE is for functions with 'static' or 'inline'
+   linkage.
+
+   However, one of the reasons that a function is a portability trap is
+   if it has the wrong signature.  Declaring FUNCTION with a different
+   signature in C is a compilation error, so this macro must use the
+   same type as any existing declaration so that programs that avoid
+   the problematic FUNCTION do not fail to compile merely because they
+   included a header that poisoned the function.  But this implies that
+   _GL_WARN_ON_USE is only safe to use if FUNCTION is known to already
+   have a declaration.  Use of this macro implies that there must not
+   be any other macro hiding the declaration of FUNCTION; but
+   undefining FUNCTION first is part of the poisoning process anyway
+   (although for symbols that are provided only via a macro, the result
+   is a compilation error rather than a warning containing
+   "literal string").  Also note that in C++, it is only safe to use if
+   FUNCTION has no overloads.
+
+   For an example, it is possible to poison 'getline' by:
+   - adding a call to gl_WARN_ON_USE_PREPARE([[#include <stdio.h>]],
+     [getline]) in configure.ac, which potentially defines
+     HAVE_RAW_DECL_GETLINE
+   - adding this code to a header that wraps the system <stdio.h>:
+     #undef getline
+     #if HAVE_RAW_DECL_GETLINE
+     _GL_WARN_ON_USE (getline, "getline is required by POSIX 2008, but"
+       "not universally present; use the gnulib module getline");
+     #endif
+
+   It is not possible to directly poison global variables.  But it is
+   possible to write a wrapper accessor function, and poison that
+   (less common usage, like &environ, will cause a compilation error
+   rather than issue the nice warning, but the end result of informing
+   the developer about their portability problem is still achieved):
+     #if HAVE_RAW_DECL_ENVIRON
+     static char ***
+     rpl_environ (void) { return &environ; }
+     _GL_WARN_ON_USE (rpl_environ, "environ is not always properly declared");
+     # undef environ
+     # define environ (*rpl_environ ())
+     #endif
+   or better (avoiding contradictory use of 'static' and 'extern'):
+     #if HAVE_RAW_DECL_ENVIRON
+     static char ***
+     _GL_WARN_ON_USE_ATTRIBUTE ("environ is not always properly declared")
+     rpl_environ (void) { return &environ; }
+     # undef environ
+     # define environ (*rpl_environ ())
+     #endif
+   */
+#ifndef _GL_WARN_ON_USE
+
+# if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__)
+/* A compiler attribute is available in gcc versions 4.3.0 and later.  */
+#  define _GL_WARN_ON_USE(function, message) \
+extern __typeof__ (function) function __attribute__ ((__warning__ (message)))
+#  define _GL_WARN_ON_USE_ATTRIBUTE(message) \
+  __attribute__ ((__warning__ (message)))
+# elif __clang_major__ >= 4
+/* Another compiler attribute is available in clang.  */
+#  define _GL_WARN_ON_USE(function, message) \
+extern __typeof__ (function) function \
+  __attribute__ ((__diagnose_if__ (1, message, "warning")))
+#  define _GL_WARN_ON_USE_ATTRIBUTE(message) \
+  __attribute__ ((__diagnose_if__ (1, message, "warning")))
+# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
+/* Verify the existence of the function.  */
+#  define _GL_WARN_ON_USE(function, message) \
+extern __typeof__ (function) function
+#  define _GL_WARN_ON_USE_ATTRIBUTE(message)
+# else /* Unsupported.  */
+#  define _GL_WARN_ON_USE(function, message) \
+_GL_WARN_EXTERN_C int _gl_warn_on_use
+#  define _GL_WARN_ON_USE_ATTRIBUTE(message)
+# endif
+#endif
+
+/* _GL_WARN_ON_USE_CXX (function, rettype_gcc, rettype_clang, parameters_and_attributes, "message")
+   is like _GL_WARN_ON_USE (function, "message"), except that in C++ mode the
+   function is declared with the given prototype, consisting of return type,
+   parameters, and attributes.
+   This variant is useful for overloaded functions in C++. _GL_WARN_ON_USE does
+   not work in this case.  */
+#ifndef _GL_WARN_ON_USE_CXX
+# if !defined __cplusplus
+#  define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
+     _GL_WARN_ON_USE (function, msg)
+# else
+#  if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__)
+/* A compiler attribute is available in gcc versions 4.3.0 and later.  */
+#   define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
+extern rettype_gcc function parameters_and_attributes \
+  __attribute__ ((__warning__ (msg)))
+#  elif __clang_major__ >= 4
+/* Another compiler attribute is available in clang.  */
+#   define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
+extern rettype_clang function parameters_and_attributes \
+  __attribute__ ((__diagnose_if__ (1, msg, "warning")))
+#  elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
+/* Verify the existence of the function.  */
+#   define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
+extern rettype_gcc function parameters_and_attributes
+#  else /* Unsupported.  */
+#   define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
+_GL_WARN_EXTERN_C int _gl_warn_on_use
+#  endif
+# endif
+#endif
+
+/* _GL_WARN_EXTERN_C declaration;
+   performs the declaration with C linkage.  */
+#ifndef _GL_WARN_EXTERN_C
+# if defined __cplusplus
+#  define _GL_WARN_EXTERN_C extern "C"
+# else
+#  define _GL_WARN_EXTERN_C extern
+# endif
+#endif
diff --git a/src/grep/lib/wchar.in.h b/src/grep/lib/wchar.in.h
new file mode 100644
index 0000000..be5d36c
--- /dev/null
+++ b/src/grep/lib/wchar.in.h
@@ -0,0 +1,1273 @@
+/* A substitute for ISO C99 <wchar.h>, for platforms that have issues.
+
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake.  */
+
+/*
+ * ISO C 99 <wchar.h> for platforms that have issues.
+ * <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/wchar.h.html>
+ *
+ * For now, this just ensures proper prerequisite inclusion order and
+ * the declaration of wcwidth().
+ */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if (((defined __need_mbstate_t || defined __need_wint_t)               \
+      && !defined __MINGW32__)                                          \
+     || (defined __hpux                                                 \
+         && ((defined _INTTYPES_INCLUDED                                \
+              && !defined _GL_FINISHED_INCLUDING_SYSTEM_INTTYPES_H)     \
+             || defined _GL_JUST_INCLUDE_SYSTEM_WCHAR_H))               \
+     || (defined __MINGW32__ && defined __STRING_H_SOURCED__)           \
+     || defined _GL_ALREADY_INCLUDING_WCHAR_H)
+/* Special invocation convention:
+   - Inside glibc and uClibc header files, but not MinGW.
+   - On HP-UX 11.00 we have a sequence of nested includes
+     <wchar.h> -> <stdlib.h> -> <stdint.h>, and the latter includes <wchar.h>,
+     once indirectly <stdint.h> -> <sys/types.h> -> <inttypes.h> -> <wchar.h>
+     and once directly.  In both situations 'wint_t' is not yet defined,
+     therefore we cannot provide the function overrides; instead include only
+     the system's <wchar.h>.
+   - With MinGW 3.22, when <string.h> includes <wchar.h>, only some part of
+     <wchar.h> is actually processed, and that doesn't include 'mbstate_t'.
+   - On IRIX 6.5, similarly, we have an include <wchar.h> -> <wctype.h>, and
+     the latter includes <wchar.h>.  But here, we have no way to detect whether
+     <wctype.h> is completely included or is still being included.  */
+
+#@INCLUDE_NEXT@ @NEXT_WCHAR_H@
+
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_WCHAR_H
+
+#define _GL_ALREADY_INCLUDING_WCHAR_H
+
+#if @HAVE_FEATURES_H@
+# include <features.h> /* for __GLIBC__ */
+#endif
+
+/* In some builds of uClibc, <wchar.h> is nonexistent and wchar_t is defined
+   by <stddef.h>.
+   But avoid namespace pollution on glibc systems.  */
+#if !(defined __GLIBC__ && !defined __UCLIBC__)
+# include <stddef.h>
+#endif
+
+/* Get free().  */
+#include <stdlib.h>
+
+/* Include the original <wchar.h> if it exists.
+   Some builds of uClibc lack it.  */
+/* The include_next requires a split double-inclusion guard.  */
+#if @HAVE_WCHAR_H@
+# @INCLUDE_NEXT@ @NEXT_WCHAR_H@
+#endif
+
+#undef _GL_ALREADY_INCLUDING_WCHAR_H
+
+#ifndef _@GUARD_PREFIX@_WCHAR_H
+#define _@GUARD_PREFIX@_WCHAR_H
+
+/* The __attribute__ feature is available in gcc versions 2.5 and later.
+   The attribute __pure__ was added in gcc 2.96.  */
+#ifndef _GL_ATTRIBUTE_PURE
+# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96) || defined __clang__
+#  define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+# else
+#  define _GL_ATTRIBUTE_PURE /* empty */
+# endif
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+
+/* Define wint_t and WEOF.  (Also done in wctype.in.h.)  */
+#if !@HAVE_WINT_T@ && !defined wint_t
+# define wint_t int
+# ifndef WEOF
+#  define WEOF -1
+# endif
+#else
+/* mingw and MSVC define wint_t as 'unsigned short' in <crtdefs.h> or
+   <stddef.h>.  This is too small: ISO C 99 section 7.24.1.(2) says that
+   wint_t must be "unchanged by default argument promotions".  Override it.  */
+# if @GNULIBHEADERS_OVERRIDE_WINT_T@
+#  if !GNULIB_defined_wint_t
+#   if @HAVE_CRTDEFS_H@
+#    include <crtdefs.h>
+#   else
+#    include <stddef.h>
+#   endif
+typedef unsigned int rpl_wint_t;
+#   undef wint_t
+#   define wint_t rpl_wint_t
+#   define GNULIB_defined_wint_t 1
+#  endif
+# endif
+# ifndef WEOF
+#  define WEOF ((wint_t) -1)
+# endif
+#endif
+
+
+/* Override mbstate_t if it is too small.
+   On IRIX 6.5, sizeof (mbstate_t) == 1, which is not sufficient for
+   implementing mbrtowc for encodings like UTF-8.
+   On AIX and MSVC, mbrtowc needs to be overridden, but mbstate_t exists and is
+   large enough and overriding it would cause problems in C++ mode.  */
+#if !(((defined _WIN32 && !defined __CYGWIN__) || @HAVE_MBSINIT@) && @HAVE_MBRTOWC@) || @REPLACE_MBSTATE_T@
+# if !GNULIB_defined_mbstate_t
+#  if !(defined _AIX || defined _MSC_VER)
+typedef int rpl_mbstate_t;
+#   undef mbstate_t
+#   define mbstate_t rpl_mbstate_t
+#  endif
+#  define GNULIB_defined_mbstate_t 1
+# endif
+#endif
+
+
+/* Convert a single-byte character to a wide character.  */
+#if @GNULIB_BTOWC@
+# if @REPLACE_BTOWC@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef btowc
+#   define btowc rpl_btowc
+#  endif
+_GL_FUNCDECL_RPL (btowc, wint_t, (int c) _GL_ATTRIBUTE_PURE);
+_GL_CXXALIAS_RPL (btowc, wint_t, (int c));
+# else
+#  if !@HAVE_BTOWC@
+_GL_FUNCDECL_SYS (btowc, wint_t, (int c) _GL_ATTRIBUTE_PURE);
+#  endif
+/* Need to cast, because on mingw, the return type is 'unsigned short'.  */
+_GL_CXXALIAS_SYS_CAST (btowc, wint_t, (int c));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (btowc);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef btowc
+# if HAVE_RAW_DECL_BTOWC
+_GL_WARN_ON_USE (btowc, "btowc is unportable - "
+                 "use gnulib module btowc for portability");
+# endif
+#endif
+
+
+/* Convert a wide character to a single-byte character.  */
+#if @GNULIB_WCTOB@
+# if @REPLACE_WCTOB@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef wctob
+#   define wctob rpl_wctob
+#  endif
+_GL_FUNCDECL_RPL (wctob, int, (wint_t wc) _GL_ATTRIBUTE_PURE);
+_GL_CXXALIAS_RPL (wctob, int, (wint_t wc));
+# else
+#  if !defined wctob && !@HAVE_DECL_WCTOB@
+/* wctob is provided by gnulib, or wctob exists but is not declared.  */
+_GL_FUNCDECL_SYS (wctob, int, (wint_t wc) _GL_ATTRIBUTE_PURE);
+#  endif
+_GL_CXXALIAS_SYS (wctob, int, (wint_t wc));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wctob);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wctob
+# if HAVE_RAW_DECL_WCTOB
+_GL_WARN_ON_USE (wctob, "wctob is unportable - "
+                 "use gnulib module wctob for portability");
+# endif
+#endif
+
+
+/* Test whether *PS is in the initial state.  */
+#if @GNULIB_MBSINIT@
+# if @REPLACE_MBSINIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mbsinit
+#   define mbsinit rpl_mbsinit
+#  endif
+_GL_FUNCDECL_RPL (mbsinit, int, (const mbstate_t *ps));
+_GL_CXXALIAS_RPL (mbsinit, int, (const mbstate_t *ps));
+# else
+#  if !@HAVE_MBSINIT@
+_GL_FUNCDECL_SYS (mbsinit, int, (const mbstate_t *ps));
+#  endif
+_GL_CXXALIAS_SYS (mbsinit, int, (const mbstate_t *ps));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (mbsinit);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef mbsinit
+# if HAVE_RAW_DECL_MBSINIT
+_GL_WARN_ON_USE (mbsinit, "mbsinit is unportable - "
+                 "use gnulib module mbsinit for portability");
+# endif
+#endif
+
+
+/* Convert a multibyte character to a wide character.  */
+#if @GNULIB_MBRTOWC@
+# if @REPLACE_MBRTOWC@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mbrtowc
+#   define mbrtowc rpl_mbrtowc
+#  endif
+_GL_FUNCDECL_RPL (mbrtowc, size_t,
+                  (wchar_t *restrict pwc, const char *restrict s, size_t n,
+                   mbstate_t *restrict ps));
+_GL_CXXALIAS_RPL (mbrtowc, size_t,
+                  (wchar_t *restrict pwc, const char *restrict s, size_t n,
+                   mbstate_t *restrict ps));
+# else
+#  if !@HAVE_MBRTOWC@
+_GL_FUNCDECL_SYS (mbrtowc, size_t,
+                  (wchar_t *restrict pwc, const char *restrict s, size_t n,
+                   mbstate_t *restrict ps));
+#  endif
+_GL_CXXALIAS_SYS (mbrtowc, size_t,
+                  (wchar_t *restrict pwc, const char *restrict s, size_t n,
+                   mbstate_t *restrict ps));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (mbrtowc);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef mbrtowc
+# if HAVE_RAW_DECL_MBRTOWC
+_GL_WARN_ON_USE (mbrtowc, "mbrtowc is unportable - "
+                 "use gnulib module mbrtowc for portability");
+# endif
+#endif
+
+
+/* Recognize a multibyte character.  */
+#if @GNULIB_MBRLEN@
+# if @REPLACE_MBRLEN@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mbrlen
+#   define mbrlen rpl_mbrlen
+#  endif
+_GL_FUNCDECL_RPL (mbrlen, size_t,
+                  (const char *restrict s, size_t n, mbstate_t *restrict ps));
+_GL_CXXALIAS_RPL (mbrlen, size_t,
+                  (const char *restrict s, size_t n, mbstate_t *restrict ps));
+# else
+#  if !@HAVE_MBRLEN@
+_GL_FUNCDECL_SYS (mbrlen, size_t,
+                  (const char *restrict s, size_t n, mbstate_t *restrict ps));
+#  endif
+_GL_CXXALIAS_SYS (mbrlen, size_t,
+                  (const char *restrict s, size_t n, mbstate_t *restrict ps));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (mbrlen);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef mbrlen
+# if HAVE_RAW_DECL_MBRLEN
+_GL_WARN_ON_USE (mbrlen, "mbrlen is unportable - "
+                 "use gnulib module mbrlen for portability");
+# endif
+#endif
+
+
+/* Convert a string to a wide string.  */
+#if @GNULIB_MBSRTOWCS@
+# if @REPLACE_MBSRTOWCS@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mbsrtowcs
+#   define mbsrtowcs rpl_mbsrtowcs
+#  endif
+_GL_FUNCDECL_RPL (mbsrtowcs, size_t,
+                  (wchar_t *restrict dest,
+                   const char **restrict srcp, size_t len,
+                   mbstate_t *restrict ps)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (mbsrtowcs, size_t,
+                  (wchar_t *restrict dest,
+                   const char **restrict srcp, size_t len,
+                   mbstate_t *restrict ps));
+# else
+#  if !@HAVE_MBSRTOWCS@
+_GL_FUNCDECL_SYS (mbsrtowcs, size_t,
+                  (wchar_t *restrict dest,
+                   const char **restrict srcp, size_t len,
+                   mbstate_t *restrict ps)
+                  _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (mbsrtowcs, size_t,
+                  (wchar_t *restrict dest,
+                   const char **restrict srcp, size_t len,
+                   mbstate_t *restrict ps));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (mbsrtowcs);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef mbsrtowcs
+# if HAVE_RAW_DECL_MBSRTOWCS
+_GL_WARN_ON_USE (mbsrtowcs, "mbsrtowcs is unportable - "
+                 "use gnulib module mbsrtowcs for portability");
+# endif
+#endif
+
+
+/* Convert a string to a wide string.  */
+#if @GNULIB_MBSNRTOWCS@
+# if @REPLACE_MBSNRTOWCS@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mbsnrtowcs
+#   define mbsnrtowcs rpl_mbsnrtowcs
+#  endif
+_GL_FUNCDECL_RPL (mbsnrtowcs, size_t,
+                  (wchar_t *restrict dest,
+                   const char **restrict srcp, size_t srclen, size_t len,
+                   mbstate_t *restrict ps)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (mbsnrtowcs, size_t,
+                  (wchar_t *restrict dest,
+                   const char **restrict srcp, size_t srclen, size_t len,
+                   mbstate_t *restrict ps));
+# else
+#  if !@HAVE_MBSNRTOWCS@
+_GL_FUNCDECL_SYS (mbsnrtowcs, size_t,
+                  (wchar_t *restrict dest,
+                   const char **restrict srcp, size_t srclen, size_t len,
+                   mbstate_t *restrict ps)
+                  _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (mbsnrtowcs, size_t,
+                  (wchar_t *restrict dest,
+                   const char **restrict srcp, size_t srclen, size_t len,
+                   mbstate_t *restrict ps));
+# endif
+_GL_CXXALIASWARN (mbsnrtowcs);
+#elif defined GNULIB_POSIXCHECK
+# undef mbsnrtowcs
+# if HAVE_RAW_DECL_MBSNRTOWCS
+_GL_WARN_ON_USE (mbsnrtowcs, "mbsnrtowcs is unportable - "
+                 "use gnulib module mbsnrtowcs for portability");
+# endif
+#endif
+
+
+/* Convert a wide character to a multibyte character.  */
+#if @GNULIB_WCRTOMB@
+# if @REPLACE_WCRTOMB@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef wcrtomb
+#   define wcrtomb rpl_wcrtomb
+#  endif
+_GL_FUNCDECL_RPL (wcrtomb, size_t,
+                  (char *restrict s, wchar_t wc, mbstate_t *restrict ps));
+_GL_CXXALIAS_RPL (wcrtomb, size_t,
+                  (char *restrict s, wchar_t wc, mbstate_t *restrict ps));
+# else
+#  if !@HAVE_WCRTOMB@
+_GL_FUNCDECL_SYS (wcrtomb, size_t,
+                  (char *restrict s, wchar_t wc, mbstate_t *restrict ps));
+#  endif
+_GL_CXXALIAS_SYS (wcrtomb, size_t,
+                  (char *restrict s, wchar_t wc, mbstate_t *restrict ps));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcrtomb);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcrtomb
+# if HAVE_RAW_DECL_WCRTOMB
+_GL_WARN_ON_USE (wcrtomb, "wcrtomb is unportable - "
+                 "use gnulib module wcrtomb for portability");
+# endif
+#endif
+
+
+/* Convert a wide string to a string.  */
+#if @GNULIB_WCSRTOMBS@
+# if @REPLACE_WCSRTOMBS@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef wcsrtombs
+#   define wcsrtombs rpl_wcsrtombs
+#  endif
+_GL_FUNCDECL_RPL (wcsrtombs, size_t,
+                  (char *restrict dest, const wchar_t **restrict srcp,
+                   size_t len,
+                   mbstate_t *restrict ps)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (wcsrtombs, size_t,
+                  (char *restrict dest, const wchar_t **restrict srcp,
+                   size_t len,
+                   mbstate_t *restrict ps));
+# else
+#  if !@HAVE_WCSRTOMBS@
+_GL_FUNCDECL_SYS (wcsrtombs, size_t,
+                  (char *restrict dest, const wchar_t **restrict srcp,
+                   size_t len,
+                   mbstate_t *restrict ps)
+                  _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (wcsrtombs, size_t,
+                  (char *restrict dest, const wchar_t **restrict srcp,
+                   size_t len,
+                   mbstate_t *restrict ps));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcsrtombs);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcsrtombs
+# if HAVE_RAW_DECL_WCSRTOMBS
+_GL_WARN_ON_USE (wcsrtombs, "wcsrtombs is unportable - "
+                 "use gnulib module wcsrtombs for portability");
+# endif
+#endif
+
+
+/* Convert a wide string to a string.  */
+#if @GNULIB_WCSNRTOMBS@
+# if @REPLACE_WCSNRTOMBS@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef wcsnrtombs
+#   define wcsnrtombs rpl_wcsnrtombs
+#  endif
+_GL_FUNCDECL_RPL (wcsnrtombs, size_t,
+                  (char *restrict dest,
+                   const wchar_t **restrict srcp, size_t srclen,
+                   size_t len,
+                   mbstate_t *restrict ps)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (wcsnrtombs, size_t,
+                  (char *restrict dest,
+                   const wchar_t **restrict srcp, size_t srclen,
+                   size_t len,
+                   mbstate_t *restrict ps));
+# else
+#  if !@HAVE_WCSNRTOMBS@ || (defined __cplusplus && defined __sun)
+_GL_FUNCDECL_SYS (wcsnrtombs, size_t,
+                  (char *restrict dest,
+                   const wchar_t **restrict srcp, size_t srclen,
+                   size_t len,
+                   mbstate_t *restrict ps)
+                  _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (wcsnrtombs, size_t,
+                  (char *restrict dest,
+                   const wchar_t **restrict srcp, size_t srclen,
+                   size_t len,
+                   mbstate_t *restrict ps));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcsnrtombs);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcsnrtombs
+# if HAVE_RAW_DECL_WCSNRTOMBS
+_GL_WARN_ON_USE (wcsnrtombs, "wcsnrtombs is unportable - "
+                 "use gnulib module wcsnrtombs for portability");
+# endif
+#endif
+
+
+/* Return the number of screen columns needed for WC.  */
+#if @GNULIB_WCWIDTH@
+# if @REPLACE_WCWIDTH@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef wcwidth
+#   define wcwidth rpl_wcwidth
+#  endif
+_GL_FUNCDECL_RPL (wcwidth, int, (wchar_t) _GL_ATTRIBUTE_PURE);
+_GL_CXXALIAS_RPL (wcwidth, int, (wchar_t));
+# else
+#  if !@HAVE_DECL_WCWIDTH@
+/* wcwidth exists but is not declared.  */
+_GL_FUNCDECL_SYS (wcwidth, int, (wchar_t) _GL_ATTRIBUTE_PURE);
+#  endif
+_GL_CXXALIAS_SYS (wcwidth, int, (wchar_t));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcwidth);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcwidth
+# if HAVE_RAW_DECL_WCWIDTH
+_GL_WARN_ON_USE (wcwidth, "wcwidth is unportable - "
+                 "use gnulib module wcwidth for portability");
+# endif
+#endif
+
+
+/* Search N wide characters of S for C.  */
+#if @GNULIB_WMEMCHR@
+# if !@HAVE_WMEMCHR@
+_GL_FUNCDECL_SYS (wmemchr, wchar_t *, (const wchar_t *s, wchar_t c, size_t n)
+                                      _GL_ATTRIBUTE_PURE);
+# endif
+  /* On some systems, this function is defined as an overloaded function:
+       extern "C++" {
+         const wchar_t * std::wmemchr (const wchar_t *, wchar_t, size_t);
+         wchar_t * std::wmemchr (wchar_t *, wchar_t, size_t);
+       }  */
+_GL_CXXALIAS_SYS_CAST2 (wmemchr,
+                        wchar_t *, (const wchar_t *, wchar_t, size_t),
+                        const wchar_t *, (const wchar_t *, wchar_t, size_t));
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+     && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (wmemchr, wchar_t *, (wchar_t *s, wchar_t c, size_t n));
+_GL_CXXALIASWARN1 (wmemchr, const wchar_t *,
+                   (const wchar_t *s, wchar_t c, size_t n));
+# elif __GLIBC__ >= 2
+_GL_CXXALIASWARN (wmemchr);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wmemchr
+# if HAVE_RAW_DECL_WMEMCHR
+_GL_WARN_ON_USE (wmemchr, "wmemchr is unportable - "
+                 "use gnulib module wmemchr for portability");
+# endif
+#endif
+
+
+/* Compare N wide characters of S1 and S2.  */
+#if @GNULIB_WMEMCMP@
+# if !@HAVE_WMEMCMP@
+_GL_FUNCDECL_SYS (wmemcmp, int,
+                  (const wchar_t *s1, const wchar_t *s2, size_t n)
+                  _GL_ATTRIBUTE_PURE);
+# endif
+_GL_CXXALIAS_SYS (wmemcmp, int,
+                  (const wchar_t *s1, const wchar_t *s2, size_t n));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wmemcmp);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wmemcmp
+# if HAVE_RAW_DECL_WMEMCMP
+_GL_WARN_ON_USE (wmemcmp, "wmemcmp is unportable - "
+                 "use gnulib module wmemcmp for portability");
+# endif
+#endif
+
+
+/* Copy N wide characters of SRC to DEST.  */
+#if @GNULIB_WMEMCPY@
+# if !@HAVE_WMEMCPY@
+_GL_FUNCDECL_SYS (wmemcpy, wchar_t *,
+                  (wchar_t *restrict dest,
+                   const wchar_t *restrict src, size_t n));
+# endif
+_GL_CXXALIAS_SYS (wmemcpy, wchar_t *,
+                  (wchar_t *restrict dest,
+                   const wchar_t *restrict src, size_t n));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wmemcpy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wmemcpy
+# if HAVE_RAW_DECL_WMEMCPY
+_GL_WARN_ON_USE (wmemcpy, "wmemcpy is unportable - "
+                 "use gnulib module wmemcpy for portability");
+# endif
+#endif
+
+
+/* Copy N wide characters of SRC to DEST, guaranteeing correct behavior for
+   overlapping memory areas.  */
+#if @GNULIB_WMEMMOVE@
+# if !@HAVE_WMEMMOVE@
+_GL_FUNCDECL_SYS (wmemmove, wchar_t *,
+                  (wchar_t *dest, const wchar_t *src, size_t n));
+# endif
+_GL_CXXALIAS_SYS (wmemmove, wchar_t *,
+                  (wchar_t *dest, const wchar_t *src, size_t n));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wmemmove);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wmemmove
+# if HAVE_RAW_DECL_WMEMMOVE
+_GL_WARN_ON_USE (wmemmove, "wmemmove is unportable - "
+                 "use gnulib module wmemmove for portability");
+# endif
+#endif
+
+
+/* Copy N wide characters of SRC to DEST.
+   Return pointer to wide characters after the last written wide character.  */
+#if @GNULIB_WMEMPCPY@
+# if !@HAVE_WMEMPCPY@
+_GL_FUNCDECL_SYS (wmempcpy, wchar_t *,
+                  (wchar_t *restrict dest,
+                   const wchar_t *restrict src, size_t n));
+# endif
+_GL_CXXALIAS_SYS (wmempcpy, wchar_t *,
+                  (wchar_t *restrict dest,
+                   const wchar_t *restrict src, size_t n));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wmempcpy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wmempcpy
+# if HAVE_RAW_DECL_WMEMPCPY
+_GL_WARN_ON_USE (wmempcpy, "wmempcpy is unportable - "
+                 "use gnulib module wmempcpy for portability");
+# endif
+#endif
+
+
+/* Set N wide characters of S to C.  */
+#if @GNULIB_WMEMSET@
+# if !@HAVE_WMEMSET@
+_GL_FUNCDECL_SYS (wmemset, wchar_t *, (wchar_t *s, wchar_t c, size_t n));
+# endif
+_GL_CXXALIAS_SYS (wmemset, wchar_t *, (wchar_t *s, wchar_t c, size_t n));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wmemset);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wmemset
+# if HAVE_RAW_DECL_WMEMSET
+_GL_WARN_ON_USE (wmemset, "wmemset is unportable - "
+                 "use gnulib module wmemset for portability");
+# endif
+#endif
+
+
+/* Return the number of wide characters in S.  */
+#if @GNULIB_WCSLEN@
+# if !@HAVE_WCSLEN@
+_GL_FUNCDECL_SYS (wcslen, size_t, (const wchar_t *s) _GL_ATTRIBUTE_PURE);
+# endif
+_GL_CXXALIAS_SYS (wcslen, size_t, (const wchar_t *s));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcslen);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcslen
+# if HAVE_RAW_DECL_WCSLEN
+_GL_WARN_ON_USE (wcslen, "wcslen is unportable - "
+                 "use gnulib module wcslen for portability");
+# endif
+#endif
+
+
+/* Return the number of wide characters in S, but at most MAXLEN.  */
+#if @GNULIB_WCSNLEN@
+# if !@HAVE_WCSNLEN@
+_GL_FUNCDECL_SYS (wcsnlen, size_t, (const wchar_t *s, size_t maxlen)
+                                   _GL_ATTRIBUTE_PURE);
+# endif
+_GL_CXXALIAS_SYS (wcsnlen, size_t, (const wchar_t *s, size_t maxlen));
+_GL_CXXALIASWARN (wcsnlen);
+#elif defined GNULIB_POSIXCHECK
+# undef wcsnlen
+# if HAVE_RAW_DECL_WCSNLEN
+_GL_WARN_ON_USE (wcsnlen, "wcsnlen is unportable - "
+                 "use gnulib module wcsnlen for portability");
+# endif
+#endif
+
+
+/* Copy SRC to DEST.  */
+#if @GNULIB_WCSCPY@
+# if !@HAVE_WCSCPY@
+_GL_FUNCDECL_SYS (wcscpy, wchar_t *,
+                  (wchar_t *restrict dest, const wchar_t *restrict src));
+# endif
+_GL_CXXALIAS_SYS (wcscpy, wchar_t *,
+                  (wchar_t *restrict dest, const wchar_t *restrict src));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcscpy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcscpy
+# if HAVE_RAW_DECL_WCSCPY
+_GL_WARN_ON_USE (wcscpy, "wcscpy is unportable - "
+                 "use gnulib module wcscpy for portability");
+# endif
+#endif
+
+
+/* Copy SRC to DEST, returning the address of the terminating L'\0' in DEST.  */
+#if @GNULIB_WCPCPY@
+# if !@HAVE_WCPCPY@
+_GL_FUNCDECL_SYS (wcpcpy, wchar_t *,
+                  (wchar_t *restrict dest, const wchar_t *restrict src));
+# endif
+_GL_CXXALIAS_SYS (wcpcpy, wchar_t *,
+                  (wchar_t *restrict dest, const wchar_t *restrict src));
+_GL_CXXALIASWARN (wcpcpy);
+#elif defined GNULIB_POSIXCHECK
+# undef wcpcpy
+# if HAVE_RAW_DECL_WCPCPY
+_GL_WARN_ON_USE (wcpcpy, "wcpcpy is unportable - "
+                 "use gnulib module wcpcpy for portability");
+# endif
+#endif
+
+
+/* Copy no more than N wide characters of SRC to DEST.  */
+#if @GNULIB_WCSNCPY@
+# if !@HAVE_WCSNCPY@
+_GL_FUNCDECL_SYS (wcsncpy, wchar_t *,
+                  (wchar_t *restrict dest,
+                   const wchar_t *restrict src, size_t n));
+# endif
+_GL_CXXALIAS_SYS (wcsncpy, wchar_t *,
+                  (wchar_t *restrict dest,
+                   const wchar_t *restrict src, size_t n));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcsncpy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcsncpy
+# if HAVE_RAW_DECL_WCSNCPY
+_GL_WARN_ON_USE (wcsncpy, "wcsncpy is unportable - "
+                 "use gnulib module wcsncpy for portability");
+# endif
+#endif
+
+
+/* Copy no more than N characters of SRC to DEST, returning the address of
+   the last character written into DEST.  */
+#if @GNULIB_WCPNCPY@
+# if !@HAVE_WCPNCPY@
+_GL_FUNCDECL_SYS (wcpncpy, wchar_t *,
+                  (wchar_t *restrict dest,
+                   const wchar_t *restrict src, size_t n));
+# endif
+_GL_CXXALIAS_SYS (wcpncpy, wchar_t *,
+                  (wchar_t *restrict dest,
+                   const wchar_t *restrict src, size_t n));
+_GL_CXXALIASWARN (wcpncpy);
+#elif defined GNULIB_POSIXCHECK
+# undef wcpncpy
+# if HAVE_RAW_DECL_WCPNCPY
+_GL_WARN_ON_USE (wcpncpy, "wcpncpy is unportable - "
+                 "use gnulib module wcpncpy for portability");
+# endif
+#endif
+
+
+/* Append SRC onto DEST.  */
+#if @GNULIB_WCSCAT@
+# if !@HAVE_WCSCAT@
+_GL_FUNCDECL_SYS (wcscat, wchar_t *,
+                  (wchar_t *restrict dest, const wchar_t *restrict src));
+# endif
+_GL_CXXALIAS_SYS (wcscat, wchar_t *,
+                  (wchar_t *restrict dest, const wchar_t *restrict src));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcscat);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcscat
+# if HAVE_RAW_DECL_WCSCAT
+_GL_WARN_ON_USE (wcscat, "wcscat is unportable - "
+                 "use gnulib module wcscat for portability");
+# endif
+#endif
+
+
+/* Append no more than N wide characters of SRC onto DEST.  */
+#if @GNULIB_WCSNCAT@
+# if !@HAVE_WCSNCAT@
+_GL_FUNCDECL_SYS (wcsncat, wchar_t *,
+                  (wchar_t *restrict dest, const wchar_t *restrict src,
+                   size_t n));
+# endif
+_GL_CXXALIAS_SYS (wcsncat, wchar_t *,
+                  (wchar_t *restrict dest, const wchar_t *restrict src,
+                   size_t n));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcsncat);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcsncat
+# if HAVE_RAW_DECL_WCSNCAT
+_GL_WARN_ON_USE (wcsncat, "wcsncat is unportable - "
+                 "use gnulib module wcsncat for portability");
+# endif
+#endif
+
+
+/* Compare S1 and S2.  */
+#if @GNULIB_WCSCMP@
+# if !@HAVE_WCSCMP@
+_GL_FUNCDECL_SYS (wcscmp, int, (const wchar_t *s1, const wchar_t *s2)
+                               _GL_ATTRIBUTE_PURE);
+# endif
+_GL_CXXALIAS_SYS (wcscmp, int, (const wchar_t *s1, const wchar_t *s2));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcscmp);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcscmp
+# if HAVE_RAW_DECL_WCSCMP
+_GL_WARN_ON_USE (wcscmp, "wcscmp is unportable - "
+                 "use gnulib module wcscmp for portability");
+# endif
+#endif
+
+
+/* Compare no more than N wide characters of S1 and S2.  */
+#if @GNULIB_WCSNCMP@
+# if !@HAVE_WCSNCMP@
+_GL_FUNCDECL_SYS (wcsncmp, int,
+                  (const wchar_t *s1, const wchar_t *s2, size_t n)
+                  _GL_ATTRIBUTE_PURE);
+# endif
+_GL_CXXALIAS_SYS (wcsncmp, int,
+                  (const wchar_t *s1, const wchar_t *s2, size_t n));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcsncmp);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcsncmp
+# if HAVE_RAW_DECL_WCSNCMP
+_GL_WARN_ON_USE (wcsncmp, "wcsncmp is unportable - "
+                 "use gnulib module wcsncmp for portability");
+# endif
+#endif
+
+
+/* Compare S1 and S2, ignoring case.  */
+#if @GNULIB_WCSCASECMP@
+# if !@HAVE_WCSCASECMP@
+_GL_FUNCDECL_SYS (wcscasecmp, int, (const wchar_t *s1, const wchar_t *s2)
+                                   _GL_ATTRIBUTE_PURE);
+# endif
+_GL_CXXALIAS_SYS (wcscasecmp, int, (const wchar_t *s1, const wchar_t *s2));
+_GL_CXXALIASWARN (wcscasecmp);
+#elif defined GNULIB_POSIXCHECK
+# undef wcscasecmp
+# if HAVE_RAW_DECL_WCSCASECMP
+_GL_WARN_ON_USE (wcscasecmp, "wcscasecmp is unportable - "
+                 "use gnulib module wcscasecmp for portability");
+# endif
+#endif
+
+
+/* Compare no more than N chars of S1 and S2, ignoring case.  */
+#if @GNULIB_WCSNCASECMP@
+# if !@HAVE_WCSNCASECMP@
+_GL_FUNCDECL_SYS (wcsncasecmp, int,
+                  (const wchar_t *s1, const wchar_t *s2, size_t n)
+                  _GL_ATTRIBUTE_PURE);
+# endif
+_GL_CXXALIAS_SYS (wcsncasecmp, int,
+                  (const wchar_t *s1, const wchar_t *s2, size_t n));
+_GL_CXXALIASWARN (wcsncasecmp);
+#elif defined GNULIB_POSIXCHECK
+# undef wcsncasecmp
+# if HAVE_RAW_DECL_WCSNCASECMP
+_GL_WARN_ON_USE (wcsncasecmp, "wcsncasecmp is unportable - "
+                 "use gnulib module wcsncasecmp for portability");
+# endif
+#endif
+
+
+/* Compare S1 and S2, both interpreted as appropriate to the LC_COLLATE
+   category of the current locale.  */
+#if @GNULIB_WCSCOLL@
+# if !@HAVE_WCSCOLL@
+_GL_FUNCDECL_SYS (wcscoll, int, (const wchar_t *s1, const wchar_t *s2));
+# endif
+_GL_CXXALIAS_SYS (wcscoll, int, (const wchar_t *s1, const wchar_t *s2));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcscoll);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcscoll
+# if HAVE_RAW_DECL_WCSCOLL
+_GL_WARN_ON_USE (wcscoll, "wcscoll is unportable - "
+                 "use gnulib module wcscoll for portability");
+# endif
+#endif
+
+
+/* Transform S2 into array pointed to by S1 such that if wcscmp is applied
+   to two transformed strings the result is the as applying 'wcscoll' to the
+   original strings.  */
+#if @GNULIB_WCSXFRM@
+# if !@HAVE_WCSXFRM@
+_GL_FUNCDECL_SYS (wcsxfrm, size_t,
+                  (wchar_t *restrict s1, const wchar_t *restrict s2, size_t n));
+# endif
+_GL_CXXALIAS_SYS (wcsxfrm, size_t,
+                  (wchar_t *restrict s1, const wchar_t *restrict s2, size_t n));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcsxfrm);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcsxfrm
+# if HAVE_RAW_DECL_WCSXFRM
+_GL_WARN_ON_USE (wcsxfrm, "wcsxfrm is unportable - "
+                 "use gnulib module wcsxfrm for portability");
+# endif
+#endif
+
+
+/* Duplicate S, returning an identical malloc'd string.  */
+#if @GNULIB_WCSDUP@
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef wcsdup
+#   define wcsdup _wcsdup
+#  endif
+_GL_CXXALIAS_MDA (wcsdup, wchar_t *, (const wchar_t *s));
+# else
+#  if !@HAVE_WCSDUP@ || __GNUC__ >= 11
+_GL_FUNCDECL_SYS (wcsdup, wchar_t *,
+                  (const wchar_t *s)
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+#  endif
+_GL_CXXALIAS_SYS (wcsdup, wchar_t *, (const wchar_t *s));
+# endif
+_GL_CXXALIASWARN (wcsdup);
+#else
+# if __GNUC__ >= 11 && !defined wcsdup
+/* For -Wmismatched-dealloc: Associate wcsdup with free or rpl_free.  */
+_GL_FUNCDECL_SYS (wcsdup, wchar_t *,
+                  (const wchar_t *s)
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+# endif
+# if defined GNULIB_POSIXCHECK
+#  undef wcsdup
+#  if HAVE_RAW_DECL_WCSDUP
+_GL_WARN_ON_USE (wcsdup, "wcsdup is unportable - "
+                 "use gnulib module wcsdup for portability");
+#  endif
+# elif @GNULIB_MDA_WCSDUP@
+/* On native Windows, map 'wcsdup' to '_wcsdup', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::wcsdup always.  */
+#  if defined _WIN32 && !defined __CYGWIN__
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    undef wcsdup
+#    define wcsdup _wcsdup
+#   endif
+_GL_CXXALIAS_MDA (wcsdup, wchar_t *, (const wchar_t *s));
+#  else
+_GL_FUNCDECL_SYS (wcsdup, wchar_t *,
+                  (const wchar_t *s)
+                  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+#   if @HAVE_DECL_WCSDUP@
+_GL_CXXALIAS_SYS (wcsdup, wchar_t *, (const wchar_t *s));
+#   endif
+#  endif
+#  if (defined _WIN32 && !defined __CYGWIN__) || @HAVE_DECL_WCSDUP@
+_GL_CXXALIASWARN (wcsdup);
+#  endif
+# endif
+#endif
+
+
+/* Find the first occurrence of WC in WCS.  */
+#if @GNULIB_WCSCHR@
+# if !@HAVE_WCSCHR@
+_GL_FUNCDECL_SYS (wcschr, wchar_t *, (const wchar_t *wcs, wchar_t wc)
+                                     _GL_ATTRIBUTE_PURE);
+# endif
+  /* On some systems, this function is defined as an overloaded function:
+       extern "C++" {
+         const wchar_t * std::wcschr (const wchar_t *, wchar_t);
+         wchar_t * std::wcschr (wchar_t *, wchar_t);
+       }  */
+_GL_CXXALIAS_SYS_CAST2 (wcschr,
+                        wchar_t *, (const wchar_t *, wchar_t),
+                        const wchar_t *, (const wchar_t *, wchar_t));
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+     && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (wcschr, wchar_t *, (wchar_t *wcs, wchar_t wc));
+_GL_CXXALIASWARN1 (wcschr, const wchar_t *, (const wchar_t *wcs, wchar_t wc));
+# elif __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcschr);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcschr
+# if HAVE_RAW_DECL_WCSCHR
+_GL_WARN_ON_USE (wcschr, "wcschr is unportable - "
+                 "use gnulib module wcschr for portability");
+# endif
+#endif
+
+
+/* Find the last occurrence of WC in WCS.  */
+#if @GNULIB_WCSRCHR@
+# if !@HAVE_WCSRCHR@
+_GL_FUNCDECL_SYS (wcsrchr, wchar_t *, (const wchar_t *wcs, wchar_t wc)
+                                      _GL_ATTRIBUTE_PURE);
+# endif
+  /* On some systems, this function is defined as an overloaded function:
+       extern "C++" {
+         const wchar_t * std::wcsrchr (const wchar_t *, wchar_t);
+         wchar_t * std::wcsrchr (wchar_t *, wchar_t);
+       }  */
+_GL_CXXALIAS_SYS_CAST2 (wcsrchr,
+                        wchar_t *, (const wchar_t *, wchar_t),
+                        const wchar_t *, (const wchar_t *, wchar_t));
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+     && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (wcsrchr, wchar_t *, (wchar_t *wcs, wchar_t wc));
+_GL_CXXALIASWARN1 (wcsrchr, const wchar_t *, (const wchar_t *wcs, wchar_t wc));
+# elif __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcsrchr);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcsrchr
+# if HAVE_RAW_DECL_WCSRCHR
+_GL_WARN_ON_USE (wcsrchr, "wcsrchr is unportable - "
+                 "use gnulib module wcsrchr for portability");
+# endif
+#endif
+
+
+/* Return the length of the initial segmet of WCS which consists entirely
+   of wide characters not in REJECT.  */
+#if @GNULIB_WCSCSPN@
+# if !@HAVE_WCSCSPN@
+_GL_FUNCDECL_SYS (wcscspn, size_t, (const wchar_t *wcs, const wchar_t *reject)
+                                   _GL_ATTRIBUTE_PURE);
+# endif
+_GL_CXXALIAS_SYS (wcscspn, size_t, (const wchar_t *wcs, const wchar_t *reject));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcscspn);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcscspn
+# if HAVE_RAW_DECL_WCSCSPN
+_GL_WARN_ON_USE (wcscspn, "wcscspn is unportable - "
+                 "use gnulib module wcscspn for portability");
+# endif
+#endif
+
+
+/* Return the length of the initial segmet of WCS which consists entirely
+   of wide characters in ACCEPT.  */
+#if @GNULIB_WCSSPN@
+# if !@HAVE_WCSSPN@
+_GL_FUNCDECL_SYS (wcsspn, size_t, (const wchar_t *wcs, const wchar_t *accept)
+                                  _GL_ATTRIBUTE_PURE);
+# endif
+_GL_CXXALIAS_SYS (wcsspn, size_t, (const wchar_t *wcs, const wchar_t *accept));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcsspn);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcsspn
+# if HAVE_RAW_DECL_WCSSPN
+_GL_WARN_ON_USE (wcsspn, "wcsspn is unportable - "
+                 "use gnulib module wcsspn for portability");
+# endif
+#endif
+
+
+/* Find the first occurrence in WCS of any character in ACCEPT.  */
+#if @GNULIB_WCSPBRK@
+# if !@HAVE_WCSPBRK@
+_GL_FUNCDECL_SYS (wcspbrk, wchar_t *,
+                  (const wchar_t *wcs, const wchar_t *accept)
+                  _GL_ATTRIBUTE_PURE);
+# endif
+  /* On some systems, this function is defined as an overloaded function:
+       extern "C++" {
+         const wchar_t * std::wcspbrk (const wchar_t *, const wchar_t *);
+         wchar_t * std::wcspbrk (wchar_t *, const wchar_t *);
+       }  */
+_GL_CXXALIAS_SYS_CAST2 (wcspbrk,
+                        wchar_t *, (const wchar_t *, const wchar_t *),
+                        const wchar_t *, (const wchar_t *, const wchar_t *));
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+     && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (wcspbrk, wchar_t *,
+                   (wchar_t *wcs, const wchar_t *accept));
+_GL_CXXALIASWARN1 (wcspbrk, const wchar_t *,
+                   (const wchar_t *wcs, const wchar_t *accept));
+# elif __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcspbrk);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcspbrk
+# if HAVE_RAW_DECL_WCSPBRK
+_GL_WARN_ON_USE (wcspbrk, "wcspbrk is unportable - "
+                 "use gnulib module wcspbrk for portability");
+# endif
+#endif
+
+
+/* Find the first occurrence of NEEDLE in HAYSTACK.  */
+#if @GNULIB_WCSSTR@
+# if !@HAVE_WCSSTR@
+_GL_FUNCDECL_SYS (wcsstr, wchar_t *,
+                  (const wchar_t *restrict haystack,
+                   const wchar_t *restrict needle)
+                  _GL_ATTRIBUTE_PURE);
+# endif
+  /* On some systems, this function is defined as an overloaded function:
+       extern "C++" {
+         const wchar_t * std::wcsstr (const wchar_t *, const wchar_t *);
+         wchar_t * std::wcsstr (wchar_t *, const wchar_t *);
+       }  */
+_GL_CXXALIAS_SYS_CAST2 (wcsstr,
+                        wchar_t *,
+                        (const wchar_t *restrict, const wchar_t *restrict),
+                        const wchar_t *,
+                        (const wchar_t *restrict, const wchar_t *restrict));
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+     && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (wcsstr, wchar_t *,
+                   (wchar_t *restrict haystack,
+                    const wchar_t *restrict needle));
+_GL_CXXALIASWARN1 (wcsstr, const wchar_t *,
+                   (const wchar_t *restrict haystack,
+                    const wchar_t *restrict needle));
+# elif __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcsstr);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcsstr
+# if HAVE_RAW_DECL_WCSSTR
+_GL_WARN_ON_USE (wcsstr, "wcsstr is unportable - "
+                 "use gnulib module wcsstr for portability");
+# endif
+#endif
+
+
+/* Divide WCS into tokens separated by characters in DELIM.  */
+#if @GNULIB_WCSTOK@
+# if @REPLACE_WCSTOK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef wcstok
+#   define wcstok rpl_wcstok
+#  endif
+_GL_FUNCDECL_RPL (wcstok, wchar_t *,
+                  (wchar_t *restrict wcs, const wchar_t *restrict delim,
+                   wchar_t **restrict ptr));
+_GL_CXXALIAS_RPL (wcstok, wchar_t *,
+                  (wchar_t *restrict wcs, const wchar_t *restrict delim,
+                   wchar_t **restrict ptr));
+# else
+#  if !@HAVE_WCSTOK@
+_GL_FUNCDECL_SYS (wcstok, wchar_t *,
+                  (wchar_t *restrict wcs, const wchar_t *restrict delim,
+                   wchar_t **restrict ptr));
+#  endif
+_GL_CXXALIAS_SYS (wcstok, wchar_t *,
+                  (wchar_t *restrict wcs, const wchar_t *restrict delim,
+                   wchar_t **restrict ptr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcstok);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcstok
+# if HAVE_RAW_DECL_WCSTOK
+_GL_WARN_ON_USE (wcstok, "wcstok is unportable - "
+                 "use gnulib module wcstok for portability");
+# endif
+#endif
+
+
+/* Determine number of column positions required for first N wide
+   characters (or fewer if S ends before this) in S.  */
+#if @GNULIB_WCSWIDTH@
+# if @REPLACE_WCSWIDTH@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef wcswidth
+#   define wcswidth rpl_wcswidth
+#  endif
+_GL_FUNCDECL_RPL (wcswidth, int, (const wchar_t *s, size_t n)
+                                 _GL_ATTRIBUTE_PURE);
+_GL_CXXALIAS_RPL (wcswidth, int, (const wchar_t *s, size_t n));
+# else
+#  if !@HAVE_WCSWIDTH@
+_GL_FUNCDECL_SYS (wcswidth, int, (const wchar_t *s, size_t n)
+                                 _GL_ATTRIBUTE_PURE);
+#  endif
+_GL_CXXALIAS_SYS (wcswidth, int, (const wchar_t *s, size_t n));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcswidth);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcswidth
+# if HAVE_RAW_DECL_WCSWIDTH
+_GL_WARN_ON_USE (wcswidth, "wcswidth is unportable - "
+                 "use gnulib module wcswidth for portability");
+# endif
+#endif
+
+
+/* Convert *TP to a date and time wide string.  See
+   <https://pubs.opengroup.org/onlinepubs/9699919799/functions/wcsftime.html>.  */
+#if @GNULIB_WCSFTIME@
+# if @REPLACE_WCSFTIME@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef wcsftime
+#   define wcsftime rpl_wcsftime
+#  endif
+_GL_FUNCDECL_RPL (wcsftime, size_t,
+                  (wchar_t *restrict __buf, size_t __bufsize,
+                   const wchar_t *restrict __fmt,
+                   const struct tm *restrict __tp)
+                  _GL_ARG_NONNULL ((1, 3, 4)));
+_GL_CXXALIAS_RPL (wcsftime, size_t,
+                  (wchar_t *restrict __buf, size_t __bufsize,
+                   const wchar_t *restrict __fmt,
+                   const struct tm *restrict __tp));
+# else
+#  if !@HAVE_WCSFTIME@
+_GL_FUNCDECL_SYS (wcsftime, size_t,
+                  (wchar_t *restrict __buf, size_t __bufsize,
+                   const wchar_t *restrict __fmt,
+                   const struct tm *restrict __tp)
+                  _GL_ARG_NONNULL ((1, 3, 4)));
+#  endif
+_GL_CXXALIAS_SYS (wcsftime, size_t,
+                  (wchar_t *restrict __buf, size_t __bufsize,
+                   const wchar_t *restrict __fmt,
+                   const struct tm *restrict __tp));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wcsftime);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wcsftime
+# if HAVE_RAW_DECL_WCSFTIME
+_GL_WARN_ON_USE (wcsftime, "wcsftime is unportable - "
+                 "use gnulib module wcsftime for portability");
+# endif
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_WCHAR_H */
+#endif /* _@GUARD_PREFIX@_WCHAR_H */
+#endif
diff --git a/src/grep/lib/wcrtomb.c b/src/grep/lib/wcrtomb.c
new file mode 100644
index 0000000..5c9fd79
--- /dev/null
+++ b/src/grep/lib/wcrtomb.c
@@ -0,0 +1,80 @@
+/* Convert wide character to multibyte character.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2008.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <wchar.h>
+
+#include <errno.h>
+#include <stdlib.h>
+
+
+size_t
+wcrtomb (char *s, wchar_t wc, mbstate_t *ps)
+#undef wcrtomb
+{
+  /* This implementation of wcrtomb supports only stateless encodings.
+     ps must be in the initial state.  */
+  if (ps != NULL && !mbsinit (ps))
+    {
+      errno = EINVAL;
+      return (size_t)(-1);
+    }
+
+#if !HAVE_WCRTOMB                       /* IRIX 6.5 */ \
+    || WCRTOMB_RETVAL_BUG               /* Solaris 11.3, MSVC */ \
+    || WCRTOMB_C_LOCALE_BUG             /* Android */
+  if (s == NULL)
+    /* We know the NUL wide character corresponds to the NUL character.  */
+    return 1;
+  else
+#endif
+    {
+#if HAVE_WCRTOMB
+# if WCRTOMB_C_LOCALE_BUG               /* Android */
+      /* Implement consistently with mbrtowc(): through a 1:1 correspondence,
+         as in ISO-8859-1.  */
+      if (wc >= 0 && wc <= 0xff)
+        {
+          *s = (unsigned char) wc;
+          return 1;
+        }
+      else
+        {
+          errno = EILSEQ;
+          return (size_t)(-1);
+        }
+# else
+      return wcrtomb (s, wc, ps);
+# endif
+#else                                   /* IRIX 6.5 */
+      /* Fallback for platforms that don't have wcrtomb().
+         Implement on top of wctomb().
+         This code is not multithread-safe.  */
+      int ret = wctomb (s, wc);
+
+      if (ret >= 0)
+        return ret;
+      else
+        {
+          errno = EILSEQ;
+          return (size_t)(-1);
+        }
+#endif
+    }
+}
diff --git a/src/grep/lib/wctob.c b/src/grep/lib/wctob.c
new file mode 100644
index 0000000..6f6bed5
--- /dev/null
+++ b/src/grep/lib/wctob.c
@@ -0,0 +1,38 @@
+/* Convert wide character to unibyte character.
+   Copyright (C) 2008, 2010-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2008.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <wchar.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+int
+wctob (wint_t wc)
+{
+  char buf[64];
+
+  if (!(MB_CUR_MAX <= sizeof (buf)))
+    abort ();
+  /* Handle the case where WEOF is a value that does not fit in a wchar_t.  */
+  if (wc == (wchar_t)wc)
+    if (wctomb (buf, (wchar_t)wc) == 1)
+      return (unsigned char) buf[0];
+  return EOF;
+}
diff --git a/src/grep/lib/wctomb-impl.h b/src/grep/lib/wctomb-impl.h
new file mode 100644
index 0000000..ff8dfe9
--- /dev/null
+++ b/src/grep/lib/wctomb-impl.h
@@ -0,0 +1,34 @@
+/* Convert wide character to multibyte character.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2011.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+int
+wctomb (char *s, wchar_t wc)
+{
+  if (s == NULL)
+    return 0;
+  else
+    {
+      mbstate_t state;
+      size_t result;
+
+      memset (&state, 0, sizeof (mbstate_t));
+      result = wcrtomb (s, wc, &state);
+      if (result == (size_t)-1)
+        return -1;
+      return result;
+    }
+}
diff --git a/src/grep/lib/wctomb.c b/src/grep/lib/wctomb.c
new file mode 100644
index 0000000..aaf5cee
--- /dev/null
+++ b/src/grep/lib/wctomb.c
@@ -0,0 +1,25 @@
+/* Convert wide character to multibyte character.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2011.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdlib.h>
+
+#include <string.h>
+#include <wchar.h>
+
+#include "wctomb-impl.h"
diff --git a/src/grep/lib/wctype-h.c b/src/grep/lib/wctype-h.c
new file mode 100644
index 0000000..150221d
--- /dev/null
+++ b/src/grep/lib/wctype-h.c
@@ -0,0 +1,23 @@
+/* Inline functions for <wctype.h>.
+
+   Copyright (C) 2012-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Normally this would be wctype.c, but that name's already taken.  */
+
+#include <config.h>
+
+#define _GL_WCTYPE_INLINE _GL_EXTERN_INLINE
+#include "wctype.h"
diff --git a/src/grep/lib/wctype.in.h b/src/grep/lib/wctype.in.h
new file mode 100644
index 0000000..652d811
--- /dev/null
+++ b/src/grep/lib/wctype.in.h
@@ -0,0 +1,732 @@
+/* A substitute for ISO C99 <wctype.h>, for platforms that lack it.
+
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible and Paul Eggert.  */
+
+/*
+ * ISO C 99 <wctype.h> for platforms that lack it.
+ * <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/wctype.h.html>
+ *
+ * iswctype, towctrans, towlower, towupper, wctrans, wctype,
+ * wctrans_t, and wctype_t are not yet implemented.
+ */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if (defined __MINGW32__ && defined __CTYPE_H_SOURCED__)
+
+/* Special invocation convention:
+   - With MinGW 3.22, when <ctype.h> includes <wctype.h>, only some part of
+     <wctype.h> is being processed, which doesn't include the idempotency
+     guard.   */
+
+#@INCLUDE_NEXT@ @NEXT_WCTYPE_H@
+
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_WCTYPE_H
+
+#if @HAVE_WINT_T@
+/* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>.  */
+# include <wchar.h>
+#endif
+
+/* Native Windows (mingw, MSVC) have declarations of towupper, towlower, and
+   isw* functions in <ctype.h>, <wchar.h> as well as in <wctype.h>.  Include
+   <ctype.h>, <wchar.h> in advance to avoid rpl_ prefix being added to the
+   declarations.  */
+#if defined _WIN32 && ! defined __CYGWIN__
+# include <ctype.h>
+# include <wchar.h>
+#endif
+
+/* Include the original <wctype.h> if it exists.
+   BeOS 5 has the functions but no <wctype.h>.  */
+/* The include_next requires a split double-inclusion guard.  */
+#if @HAVE_WCTYPE_H@
+# @INCLUDE_NEXT@ @NEXT_WCTYPE_H@
+#endif
+
+#ifndef _@GUARD_PREFIX@_WCTYPE_H
+#define _@GUARD_PREFIX@_WCTYPE_H
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef _GL_WCTYPE_INLINE
+# define _GL_WCTYPE_INLINE _GL_INLINE
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+/* Solaris 2.6 <wctype.h> includes <widec.h> which includes <euc.h> which
+   #defines a number of identifiers in the application namespace.  Revert
+   these #defines.  */
+#ifdef __sun
+# undef multibyte
+# undef eucw1
+# undef eucw2
+# undef eucw3
+# undef scrw1
+# undef scrw2
+# undef scrw3
+#endif
+
+/* Define wint_t and WEOF.  (Also done in wchar.in.h.)  */
+#if !@HAVE_WINT_T@ && !defined wint_t
+# define wint_t int
+# ifndef WEOF
+#  define WEOF -1
+# endif
+#else
+/* mingw and MSVC define wint_t as 'unsigned short' in <crtdefs.h> or
+   <stddef.h>.  This is too small: ISO C 99 section 7.24.1.(2) says that
+   wint_t must be "unchanged by default argument promotions".  Override it.  */
+# if @GNULIBHEADERS_OVERRIDE_WINT_T@
+#  if !GNULIB_defined_wint_t
+#   if @HAVE_CRTDEFS_H@
+#    include <crtdefs.h>
+#   else
+#    include <stddef.h>
+#   endif
+typedef unsigned int rpl_wint_t;
+#   undef wint_t
+#   define wint_t rpl_wint_t
+#   define GNULIB_defined_wint_t 1
+#  endif
+# endif
+# ifndef WEOF
+#  define WEOF ((wint_t) -1)
+# endif
+#endif
+
+
+#if !GNULIB_defined_wctype_functions
+
+/* FreeBSD 4.4 to 4.11 has <wctype.h> but lacks the functions.
+   Linux libc5 has <wctype.h> and the functions but they are broken.
+   mingw and MSVC have <wctype.h> and the functions but they take a wchar_t
+   as argument, not an rpl_wint_t.
+   Assume all 11 functions (all isw* except iswblank) are implemented the
+   same way, or not at all.  */
+# if ! @HAVE_ISWCNTRL@ || @REPLACE_ISWCNTRL@
+
+#  if @GNULIBHEADERS_OVERRIDE_WINT_T@ /* implies @REPLACE_ISWCNTRL@ */
+
+_GL_WCTYPE_INLINE int
+rpl_iswalnum (wint_t wc)
+{
+  return ((wchar_t) wc == wc ? iswalnum ((wchar_t) wc) : 0);
+}
+
+_GL_WCTYPE_INLINE int
+rpl_iswalpha (wint_t wc)
+{
+  return ((wchar_t) wc == wc ? iswalpha ((wchar_t) wc) : 0);
+}
+
+_GL_WCTYPE_INLINE int
+rpl_iswblank (wint_t wc)
+{
+  return ((wchar_t) wc == wc ? iswblank ((wchar_t) wc) : 0);
+}
+
+_GL_WCTYPE_INLINE int
+rpl_iswcntrl (wint_t wc)
+{
+  return ((wchar_t) wc == wc ? iswcntrl ((wchar_t) wc) : 0);
+}
+
+_GL_WCTYPE_INLINE int
+rpl_iswdigit (wint_t wc)
+{
+  return ((wchar_t) wc == wc ? wc >= '0' && wc <= '9' : 0);
+}
+
+_GL_WCTYPE_INLINE int
+rpl_iswgraph (wint_t wc)
+{
+  return ((wchar_t) wc == wc ? iswgraph ((wchar_t) wc) : 0);
+}
+
+_GL_WCTYPE_INLINE int
+rpl_iswlower (wint_t wc)
+{
+  return ((wchar_t) wc == wc ? iswlower ((wchar_t) wc) : 0);
+}
+
+_GL_WCTYPE_INLINE int
+rpl_iswprint (wint_t wc)
+{
+  return ((wchar_t) wc == wc ? iswprint ((wchar_t) wc) : 0);
+}
+
+_GL_WCTYPE_INLINE int
+rpl_iswpunct (wint_t wc)
+{
+  return ((wchar_t) wc == wc ? iswpunct ((wchar_t) wc) : 0);
+}
+
+_GL_WCTYPE_INLINE int
+rpl_iswspace (wint_t wc)
+{
+  return ((wchar_t) wc == wc ? iswspace ((wchar_t) wc) : 0);
+}
+
+_GL_WCTYPE_INLINE int
+rpl_iswupper (wint_t wc)
+{
+  return ((wchar_t) wc == wc ? iswupper ((wchar_t) wc) : 0);
+}
+
+_GL_WCTYPE_INLINE int
+rpl_iswxdigit (wint_t wc)
+{
+  return ((wchar_t) wc == wc
+          ? (wc >= '0' && wc <= '9')
+            || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'F')
+          : 0);
+}
+
+_GL_WCTYPE_INLINE wint_t
+rpl_towlower (wint_t wc)
+{
+  return ((wchar_t) wc == wc ? (wchar_t) towlower ((wchar_t) wc) : wc);
+}
+
+_GL_WCTYPE_INLINE wint_t
+rpl_towupper (wint_t wc)
+{
+  return ((wchar_t) wc == wc ? (wchar_t) towupper ((wchar_t) wc) : wc);
+}
+
+#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#    undef iswalnum
+#    undef iswalpha
+#    undef iswblank
+#    undef iswcntrl
+#    undef iswdigit
+#    undef iswgraph
+#    undef iswlower
+#    undef iswprint
+#    undef iswpunct
+#    undef iswspace
+#    undef iswupper
+#    undef iswxdigit
+#    undef towlower
+#    undef towupper
+#    define iswalnum rpl_iswalnum
+#    define iswalpha rpl_iswalpha
+#    define iswblank rpl_iswblank
+#    define iswcntrl rpl_iswcntrl
+#    define iswdigit rpl_iswdigit
+#    define iswgraph rpl_iswgraph
+#    define iswlower rpl_iswlower
+#    define iswprint rpl_iswprint
+#    define iswpunct rpl_iswpunct
+#    define iswspace rpl_iswspace
+#    define iswupper rpl_iswupper
+#    define iswxdigit rpl_iswxdigit
+#    define towlower rpl_towlower
+#    define towupper rpl_towupper
+#   endif
+
+#  else
+
+/* IRIX 5.3 has macros but no functions, its isw* macros refer to an
+   undefined variable _ctmp_ and to <ctype.h> macros like _P, and they
+   refer to system functions like _iswctype that are not in the
+   standard C library.  Rather than try to get ancient buggy
+   implementations like this to work, just disable them.  */
+#   undef iswalnum
+#   undef iswalpha
+#   undef iswblank
+#   undef iswcntrl
+#   undef iswdigit
+#   undef iswgraph
+#   undef iswlower
+#   undef iswprint
+#   undef iswpunct
+#   undef iswspace
+#   undef iswupper
+#   undef iswxdigit
+#   undef towlower
+#   undef towupper
+
+/* Linux libc5 has <wctype.h> and the functions but they are broken.  */
+#   if @REPLACE_ISWCNTRL@
+#    if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#     define iswalnum rpl_iswalnum
+#     define iswalpha rpl_iswalpha
+#     define iswblank rpl_iswblank
+#     define iswcntrl rpl_iswcntrl
+#     define iswdigit rpl_iswdigit
+#     define iswgraph rpl_iswgraph
+#     define iswlower rpl_iswlower
+#     define iswprint rpl_iswprint
+#     define iswpunct rpl_iswpunct
+#     define iswspace rpl_iswspace
+#     define iswupper rpl_iswupper
+#     define iswxdigit rpl_iswxdigit
+#    endif
+#   endif
+#   if @REPLACE_TOWLOWER@
+#    if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#     define towlower rpl_towlower
+#     define towupper rpl_towupper
+#    endif
+#   endif
+
+_GL_WCTYPE_INLINE int
+#   if @REPLACE_ISWCNTRL@
+rpl_iswalnum
+#   else
+iswalnum
+#   endif
+         (wint_t wc)
+{
+  return ((wc >= '0' && wc <= '9')
+          || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z'));
+}
+
+_GL_WCTYPE_INLINE int
+#   if @REPLACE_ISWCNTRL@
+rpl_iswalpha
+#   else
+iswalpha
+#   endif
+         (wint_t wc)
+{
+  return (wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z';
+}
+
+_GL_WCTYPE_INLINE int
+#   if @REPLACE_ISWCNTRL@
+rpl_iswblank
+#   else
+iswblank
+#   endif
+         (wint_t wc)
+{
+  return wc == ' ' || wc == '\t';
+}
+
+_GL_WCTYPE_INLINE int
+#   if @REPLACE_ISWCNTRL@
+rpl_iswcntrl
+#   else
+iswcntrl
+#   endif
+        (wint_t wc)
+{
+  return (wc & ~0x1f) == 0 || wc == 0x7f;
+}
+
+_GL_WCTYPE_INLINE int
+#   if @REPLACE_ISWDIGIT@
+rpl_iswdigit
+#   else
+iswdigit
+#   endif
+         (wint_t wc)
+{
+  return wc >= '0' && wc <= '9';
+}
+
+_GL_WCTYPE_INLINE int
+#   if @REPLACE_ISWCNTRL@
+rpl_iswgraph
+#   else
+iswgraph
+#   endif
+         (wint_t wc)
+{
+  return wc >= '!' && wc <= '~';
+}
+
+_GL_WCTYPE_INLINE int
+#   if @REPLACE_ISWCNTRL@
+rpl_iswlower
+#   else
+iswlower
+#   endif
+         (wint_t wc)
+{
+  return wc >= 'a' && wc <= 'z';
+}
+
+_GL_WCTYPE_INLINE int
+#   if @REPLACE_ISWCNTRL@
+rpl_iswprint
+#   else
+iswprint
+#   endif
+         (wint_t wc)
+{
+  return wc >= ' ' && wc <= '~';
+}
+
+_GL_WCTYPE_INLINE int
+#   if @REPLACE_ISWCNTRL@
+rpl_iswpunct
+#   else
+iswpunct
+#   endif
+         (wint_t wc)
+{
+  return (wc >= '!' && wc <= '~'
+          && !((wc >= '0' && wc <= '9')
+               || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z')));
+}
+
+_GL_WCTYPE_INLINE int
+#   if @REPLACE_ISWCNTRL@
+rpl_iswspace
+#   else
+iswspace
+#   endif
+         (wint_t wc)
+{
+  return (wc == ' ' || wc == '\t'
+          || wc == '\n' || wc == '\v' || wc == '\f' || wc == '\r');
+}
+
+_GL_WCTYPE_INLINE int
+#   if @REPLACE_ISWCNTRL@
+rpl_iswupper
+#   else
+iswupper
+#   endif
+         (wint_t wc)
+{
+  return wc >= 'A' && wc <= 'Z';
+}
+
+_GL_WCTYPE_INLINE int
+#   if @REPLACE_ISWXDIGIT@
+rpl_iswxdigit
+#   else
+iswxdigit
+#   endif
+          (wint_t wc)
+{
+  return ((wc >= '0' && wc <= '9')
+          || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'F'));
+}
+
+_GL_WCTYPE_INLINE wint_t
+#   if @REPLACE_TOWLOWER@
+rpl_towlower
+#   else
+towlower
+#   endif
+         (wint_t wc)
+{
+  return (wc >= 'A' && wc <= 'Z' ? wc - 'A' + 'a' : wc);
+}
+
+_GL_WCTYPE_INLINE wint_t
+#   if @REPLACE_TOWLOWER@
+rpl_towupper
+#   else
+towupper
+#   endif
+         (wint_t wc)
+{
+  return (wc >= 'a' && wc <= 'z' ? wc - 'a' + 'A' : wc);
+}
+
+#  endif
+
+# else
+/* Only some of the functions are missing or broken.  */
+
+#  if @GNULIB_ISWBLANK@ && (! @HAVE_ISWBLANK@ || @REPLACE_ISWBLANK@)
+/* Only the iswblank function is missing.  */
+#   if @REPLACE_ISWBLANK@
+#    if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#     define iswblank rpl_iswblank
+#    endif
+_GL_FUNCDECL_RPL (iswblank, int, (wint_t wc));
+#   else
+_GL_FUNCDECL_SYS (iswblank, int, (wint_t wc));
+#   endif
+#  endif
+
+#  if @GNULIB_ISWDIGIT@
+#   if @REPLACE_ISWDIGIT@
+#    if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#     undef iswdigit
+#     define iswdigit rpl_iswdigit
+#    endif
+_GL_FUNCDECL_RPL (iswdigit, int, (wint_t wc));
+#   endif
+#  endif
+
+#  if @GNULIB_ISWXDIGIT@
+#   if @REPLACE_ISWXDIGIT@
+#    if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#     undef iswxdigit
+#     define iswxdigit rpl_iswxdigit
+#    endif
+_GL_FUNCDECL_RPL (iswxdigit, int, (wint_t wc));
+#   endif
+#  endif
+
+# endif
+
+# if defined __MINGW32__ && !@GNULIBHEADERS_OVERRIDE_WINT_T@
+
+/* On native Windows, wchar_t is uint16_t, and wint_t is uint32_t.
+   The functions towlower and towupper are implemented in the MSVCRT library
+   to take a wchar_t argument and return a wchar_t result.  mingw declares
+   these functions to take a wint_t argument and return a wint_t result.
+   This means that:
+   1. When the user passes an argument outside the range 0x0000..0xFFFF, the
+      function will look only at the lower 16 bits.  This is allowed according
+      to POSIX.
+   2. The return value is returned in the lower 16 bits of the result register.
+      The upper 16 bits are random: whatever happened to be in that part of the
+      result register.  We need to fix this by adding a zero-extend from
+      wchar_t to wint_t after the call.  */
+
+_GL_WCTYPE_INLINE wint_t
+rpl_towlower (wint_t wc)
+{
+  return (wint_t) (wchar_t) towlower (wc);
+}
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define towlower rpl_towlower
+#  endif
+
+_GL_WCTYPE_INLINE wint_t
+rpl_towupper (wint_t wc)
+{
+  return (wint_t) (wchar_t) towupper (wc);
+}
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define towupper rpl_towupper
+#  endif
+
+# endif /* __MINGW32__ && !@GNULIBHEADERS_OVERRIDE_WINT_T@ */
+
+# define GNULIB_defined_wctype_functions 1
+#endif
+
+#if @REPLACE_ISWCNTRL@
+_GL_CXXALIAS_RPL (iswalnum, int, (wint_t wc));
+#else
+_GL_CXXALIAS_SYS (iswalnum, int, (wint_t wc));
+#endif
+#if @REPLACE_ISWCNTRL@
+_GL_CXXALIAS_RPL (iswalpha, int, (wint_t wc));
+#else
+_GL_CXXALIAS_SYS (iswalpha, int, (wint_t wc));
+#endif
+#if @REPLACE_ISWCNTRL@
+_GL_CXXALIAS_RPL (iswcntrl, int, (wint_t wc));
+#else
+_GL_CXXALIAS_SYS (iswcntrl, int, (wint_t wc));
+#endif
+#if @GNULIB_ISWDIGIT@
+# if @REPLACE_ISWDIGIT@
+_GL_CXXALIAS_RPL (iswdigit, int, (wint_t wc));
+# else
+_GL_CXXALIAS_SYS (iswdigit, int, (wint_t wc));
+# endif
+#endif
+#if @REPLACE_ISWCNTRL@
+_GL_CXXALIAS_RPL (iswgraph, int, (wint_t wc));
+#else
+_GL_CXXALIAS_SYS (iswgraph, int, (wint_t wc));
+#endif
+#if @REPLACE_ISWCNTRL@
+_GL_CXXALIAS_RPL (iswlower, int, (wint_t wc));
+#else
+_GL_CXXALIAS_SYS (iswlower, int, (wint_t wc));
+#endif
+#if @REPLACE_ISWCNTRL@
+_GL_CXXALIAS_RPL (iswprint, int, (wint_t wc));
+#else
+_GL_CXXALIAS_SYS (iswprint, int, (wint_t wc));
+#endif
+#if @REPLACE_ISWCNTRL@
+_GL_CXXALIAS_RPL (iswpunct, int, (wint_t wc));
+#else
+_GL_CXXALIAS_SYS (iswpunct, int, (wint_t wc));
+#endif
+#if @REPLACE_ISWCNTRL@
+_GL_CXXALIAS_RPL (iswspace, int, (wint_t wc));
+#else
+_GL_CXXALIAS_SYS (iswspace, int, (wint_t wc));
+#endif
+#if @REPLACE_ISWCNTRL@
+_GL_CXXALIAS_RPL (iswupper, int, (wint_t wc));
+#else
+_GL_CXXALIAS_SYS (iswupper, int, (wint_t wc));
+#endif
+#if @GNULIB_ISWXDIGIT@
+# if @REPLACE_ISWXDIGIT@
+_GL_CXXALIAS_RPL (iswxdigit, int, (wint_t wc));
+# else
+_GL_CXXALIAS_SYS (iswxdigit, int, (wint_t wc));
+# endif
+#endif
+#if __GLIBC__ >= 2
+_GL_CXXALIASWARN (iswalnum);
+_GL_CXXALIASWARN (iswalpha);
+_GL_CXXALIASWARN (iswcntrl);
+_GL_CXXALIASWARN (iswdigit);
+_GL_CXXALIASWARN (iswgraph);
+_GL_CXXALIASWARN (iswlower);
+_GL_CXXALIASWARN (iswprint);
+_GL_CXXALIASWARN (iswpunct);
+_GL_CXXALIASWARN (iswspace);
+_GL_CXXALIASWARN (iswupper);
+_GL_CXXALIASWARN (iswxdigit);
+#endif
+
+#if @GNULIB_ISWBLANK@
+# if @REPLACE_ISWCNTRL@ || @REPLACE_ISWBLANK@
+_GL_CXXALIAS_RPL (iswblank, int, (wint_t wc));
+# else
+_GL_CXXALIAS_SYS (iswblank, int, (wint_t wc));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (iswblank);
+# endif
+#endif
+
+#if !@HAVE_WCTYPE_T@
+# if !GNULIB_defined_wctype_t
+typedef void * wctype_t;
+#  define GNULIB_defined_wctype_t 1
+# endif
+#endif
+
+/* Get a descriptor for a wide character property.  */
+#if @GNULIB_WCTYPE@
+# if !@HAVE_WCTYPE_T@
+_GL_FUNCDECL_SYS (wctype, wctype_t, (const char *name));
+# endif
+_GL_CXXALIAS_SYS (wctype, wctype_t, (const char *name));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wctype);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wctype
+# if HAVE_RAW_DECL_WCTYPE
+_GL_WARN_ON_USE (wctype, "wctype is unportable - "
+                 "use gnulib module wctype for portability");
+# endif
+#endif
+
+/* Test whether a wide character has a given property.
+   The argument WC must be either a wchar_t value or WEOF.
+   The argument DESC must have been returned by the wctype() function.  */
+#if @GNULIB_ISWCTYPE@
+# if @GNULIBHEADERS_OVERRIDE_WINT_T@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef iswctype
+#   define iswctype rpl_iswctype
+#  endif
+_GL_FUNCDECL_RPL (iswctype, int, (wint_t wc, wctype_t desc));
+_GL_CXXALIAS_RPL (iswctype, int, (wint_t wc, wctype_t desc));
+# else
+#  if !@HAVE_WCTYPE_T@
+_GL_FUNCDECL_SYS (iswctype, int, (wint_t wc, wctype_t desc));
+#  endif
+_GL_CXXALIAS_SYS (iswctype, int, (wint_t wc, wctype_t desc));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (iswctype);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef iswctype
+# if HAVE_RAW_DECL_ISWCTYPE
+_GL_WARN_ON_USE (iswctype, "iswctype is unportable - "
+                 "use gnulib module iswctype for portability");
+# endif
+#endif
+
+#if @REPLACE_TOWLOWER@ || defined __MINGW32__
+_GL_CXXALIAS_RPL (towlower, wint_t, (wint_t wc));
+_GL_CXXALIAS_RPL (towupper, wint_t, (wint_t wc));
+#else
+_GL_CXXALIAS_SYS (towlower, wint_t, (wint_t wc));
+_GL_CXXALIAS_SYS (towupper, wint_t, (wint_t wc));
+#endif
+#if __GLIBC__ >= 2
+_GL_CXXALIASWARN (towlower);
+_GL_CXXALIASWARN (towupper);
+#endif
+
+#if !@HAVE_WCTRANS_T@
+# if !GNULIB_defined_wctrans_t
+typedef void * wctrans_t;
+#  define GNULIB_defined_wctrans_t 1
+# endif
+#endif
+
+/* Get a descriptor for a wide character case conversion.  */
+#if @GNULIB_WCTRANS@
+# if !@HAVE_WCTRANS_T@
+_GL_FUNCDECL_SYS (wctrans, wctrans_t, (const char *name));
+# endif
+_GL_CXXALIAS_SYS (wctrans, wctrans_t, (const char *name));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (wctrans);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wctrans
+# if HAVE_RAW_DECL_WCTRANS
+_GL_WARN_ON_USE (wctrans, "wctrans is unportable - "
+                 "use gnulib module wctrans for portability");
+# endif
+#endif
+
+/* Perform a given case conversion on a wide character.
+   The argument WC must be either a wchar_t value or WEOF.
+   The argument DESC must have been returned by the wctrans() function.  */
+#if @GNULIB_TOWCTRANS@
+# if !@HAVE_WCTRANS_T@
+_GL_FUNCDECL_SYS (towctrans, wint_t, (wint_t wc, wctrans_t desc));
+# endif
+_GL_CXXALIAS_SYS (towctrans, wint_t, (wint_t wc, wctrans_t desc));
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (towctrans);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef towctrans
+# if HAVE_RAW_DECL_TOWCTRANS
+_GL_WARN_ON_USE (towctrans, "towctrans is unportable - "
+                 "use gnulib module towctrans for portability");
+# endif
+#endif
+
+_GL_INLINE_HEADER_END
+
+#endif /* _@GUARD_PREFIX@_WCTYPE_H */
+#endif /* _@GUARD_PREFIX@_WCTYPE_H */
+#endif
diff --git a/src/grep/lib/wcwidth.c b/src/grep/lib/wcwidth.c
new file mode 100644
index 0000000..7f11211
--- /dev/null
+++ b/src/grep/lib/wcwidth.c
@@ -0,0 +1,73 @@
+/* Determine the number of screen columns needed for a character.
+   Copyright (C) 2006-2007, 2010-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <wchar.h>
+
+/* Get iswprint.  */
+#include <wctype.h>
+
+#include "localcharset.h"
+#include "streq.h"
+#include "uniwidth.h"
+
+/* Returns 1 if the current locale is an UTF-8 locale, 0 otherwise.  */
+static inline int
+is_locale_utf8 (void)
+{
+  const char *encoding = locale_charset ();
+  return STREQ_OPT (encoding, "UTF-8", 'U', 'T', 'F', '-', '8', 0, 0, 0, 0);
+}
+
+#if GNULIB_WCHAR_SINGLE_LOCALE
+/* When we know that the locale does not change, provide a speedup by
+   caching the value of is_locale_utf8.  */
+static int cached_is_locale_utf8 = -1;
+static inline int
+is_locale_utf8_cached (void)
+{
+  if (cached_is_locale_utf8 < 0)
+    cached_is_locale_utf8 = is_locale_utf8 ();
+  return cached_is_locale_utf8;
+}
+#else
+/* By default, don't make assumptions, hence no caching.  */
+# define is_locale_utf8_cached is_locale_utf8
+#endif
+
+int
+wcwidth (wchar_t wc)
+#undef wcwidth
+{
+  /* In UTF-8 locales, use a Unicode aware width function.  */
+  if (is_locale_utf8_cached ())
+    {
+      /* We assume that in a UTF-8 locale, a wide character is the same as a
+         Unicode character.  */
+      return uc_width (wc, "UTF-8");
+    }
+  else
+    {
+      /* Otherwise, fall back to the system's wcwidth function.  */
+#if HAVE_WCWIDTH
+      return wcwidth (wc);
+#else
+      return wc == 0 ? 0 : iswprint (wc) ? 1 : -1;
+#endif
+    }
+}
diff --git a/src/grep/lib/windows-initguard.h b/src/grep/lib/windows-initguard.h
new file mode 100644
index 0000000..7999b23
--- /dev/null
+++ b/src/grep/lib/windows-initguard.h
@@ -0,0 +1,35 @@
+/* Init guards, somewhat like spinlocks (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-win32.h.  */
+
+#ifndef _WINDOWS_INITGUARD_H
+#define _WINDOWS_INITGUARD_H
+
+#define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#include <windows.h>
+
+typedef struct
+        {
+          volatile int done;
+          volatile LONG started;
+        }
+        glwthread_initguard_t;
+
+#define GLWTHREAD_INITGUARD_INIT { 0, -1 }
+
+#endif /* _WINDOWS_INITGUARD_H */
diff --git a/src/grep/lib/windows-mutex.c b/src/grep/lib/windows-mutex.c
new file mode 100644
index 0000000..2edfeaa
--- /dev/null
+++ b/src/grep/lib/windows-mutex.c
@@ -0,0 +1,95 @@
+/* Plain mutexes (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-win32.h.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "windows-mutex.h"
+
+#include <errno.h>
+
+void
+glwthread_mutex_init (glwthread_mutex_t *mutex)
+{
+  InitializeCriticalSection (&mutex->lock);
+  mutex->guard.done = 1;
+}
+
+int
+glwthread_mutex_lock (glwthread_mutex_t *mutex)
+{
+  if (!mutex->guard.done)
+    {
+      if (InterlockedIncrement (&mutex->guard.started) == 0)
+        /* This thread is the first one to need this mutex.  Initialize it.  */
+        glwthread_mutex_init (mutex);
+      else
+        {
+          /* Don't let mutex->guard.started grow and wrap around.  */
+          InterlockedDecrement (&mutex->guard.started);
+          /* Yield the CPU while waiting for another thread to finish
+             initializing this mutex.  */
+          while (!mutex->guard.done)
+            Sleep (0);
+        }
+    }
+  EnterCriticalSection (&mutex->lock);
+  return 0;
+}
+
+int
+glwthread_mutex_trylock (glwthread_mutex_t *mutex)
+{
+  if (!mutex->guard.done)
+    {
+      if (InterlockedIncrement (&mutex->guard.started) == 0)
+        /* This thread is the first one to need this mutex.  Initialize it.  */
+        glwthread_mutex_init (mutex);
+      else
+        {
+          /* Don't let mutex->guard.started grow and wrap around.  */
+          InterlockedDecrement (&mutex->guard.started);
+          /* Let another thread finish initializing this mutex, and let it also
+             lock this mutex.  */
+          return EBUSY;
+        }
+    }
+  if (!TryEnterCriticalSection (&mutex->lock))
+    return EBUSY;
+  return 0;
+}
+
+int
+glwthread_mutex_unlock (glwthread_mutex_t *mutex)
+{
+  if (!mutex->guard.done)
+    return EINVAL;
+  LeaveCriticalSection (&mutex->lock);
+  return 0;
+}
+
+int
+glwthread_mutex_destroy (glwthread_mutex_t *mutex)
+{
+  if (!mutex->guard.done)
+    return EINVAL;
+  DeleteCriticalSection (&mutex->lock);
+  mutex->guard.done = 0;
+  return 0;
+}
diff --git a/src/grep/lib/windows-mutex.h b/src/grep/lib/windows-mutex.h
new file mode 100644
index 0000000..5ecf9f8
--- /dev/null
+++ b/src/grep/lib/windows-mutex.h
@@ -0,0 +1,51 @@
+/* Plain mutexes (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-win32.h.  */
+
+#ifndef _WINDOWS_MUTEX_H
+#define _WINDOWS_MUTEX_H
+
+#define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#include <windows.h>
+
+#include "windows-initguard.h"
+
+typedef struct
+        {
+          glwthread_initguard_t guard; /* protects the initialization */
+          CRITICAL_SECTION lock;
+        }
+        glwthread_mutex_t;
+
+#define GLWTHREAD_MUTEX_INIT { GLWTHREAD_INITGUARD_INIT }
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern void glwthread_mutex_init (glwthread_mutex_t *mutex);
+extern int glwthread_mutex_lock (glwthread_mutex_t *mutex);
+extern int glwthread_mutex_trylock (glwthread_mutex_t *mutex);
+extern int glwthread_mutex_unlock (glwthread_mutex_t *mutex);
+extern int glwthread_mutex_destroy (glwthread_mutex_t *mutex);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _WINDOWS_MUTEX_H */
diff --git a/src/grep/lib/windows-once.c b/src/grep/lib/windows-once.c
new file mode 100644
index 0000000..8dcd37c
--- /dev/null
+++ b/src/grep/lib/windows-once.c
@@ -0,0 +1,62 @@
+/* Once-only control (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-win32.h.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "windows-once.h"
+
+#include <stdlib.h>
+
+void
+glwthread_once (glwthread_once_t *once_control, void (*initfunction) (void))
+{
+  if (once_control->inited <= 0)
+    {
+      if (InterlockedIncrement (&once_control->started) == 0)
+        {
+          /* This thread is the first one to come to this once_control.  */
+          InitializeCriticalSection (&once_control->lock);
+          EnterCriticalSection (&once_control->lock);
+          once_control->inited = 0;
+          initfunction ();
+          once_control->inited = 1;
+          LeaveCriticalSection (&once_control->lock);
+        }
+      else
+        {
+          /* Don't let once_control->started grow and wrap around.  */
+          InterlockedDecrement (&once_control->started);
+          /* Some other thread has already started the initialization.
+             Yield the CPU while waiting for the other thread to finish
+             initializing and taking the lock.  */
+          while (once_control->inited < 0)
+            Sleep (0);
+          if (once_control->inited <= 0)
+            {
+              /* Take the lock.  This blocks until the other thread has
+                 finished calling the initfunction.  */
+              EnterCriticalSection (&once_control->lock);
+              LeaveCriticalSection (&once_control->lock);
+              if (!(once_control->inited > 0))
+                abort ();
+            }
+        }
+    }
+}
diff --git a/src/grep/lib/windows-once.h b/src/grep/lib/windows-once.h
new file mode 100644
index 0000000..58632f9
--- /dev/null
+++ b/src/grep/lib/windows-once.h
@@ -0,0 +1,47 @@
+/* Once-only control (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-win32.h.  */
+
+#ifndef _WINDOWS_ONCE_H
+#define _WINDOWS_ONCE_H
+
+#define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#include <windows.h>
+
+typedef struct
+        {
+          volatile int inited;
+          volatile LONG started;
+          CRITICAL_SECTION lock;
+        }
+        glwthread_once_t;
+
+#define GLWTHREAD_ONCE_INIT { -1, -1 }
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern void glwthread_once (glwthread_once_t *once_control,
+                            void (*initfunction) (void));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _WINDOWS_ONCE_H */
diff --git a/src/grep/lib/windows-recmutex.c b/src/grep/lib/windows-recmutex.c
new file mode 100644
index 0000000..cfc94b4
--- /dev/null
+++ b/src/grep/lib/windows-recmutex.c
@@ -0,0 +1,127 @@
+/* Plain recursive mutexes (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-win32.h.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "windows-recmutex.h"
+
+#include <errno.h>
+
+void
+glwthread_recmutex_init (glwthread_recmutex_t *mutex)
+{
+  mutex->owner = 0;
+  mutex->depth = 0;
+  InitializeCriticalSection (&mutex->lock);
+  mutex->guard.done = 1;
+}
+
+int
+glwthread_recmutex_lock (glwthread_recmutex_t *mutex)
+{
+  if (!mutex->guard.done)
+    {
+      if (InterlockedIncrement (&mutex->guard.started) == 0)
+        /* This thread is the first one to need this mutex.  Initialize it.  */
+        glwthread_recmutex_init (mutex);
+      else
+        {
+          /* Don't let mutex->guard.started grow and wrap around.  */
+          InterlockedDecrement (&mutex->guard.started);
+          /* Yield the CPU while waiting for another thread to finish
+             initializing this mutex.  */
+          while (!mutex->guard.done)
+            Sleep (0);
+        }
+    }
+  {
+    DWORD self = GetCurrentThreadId ();
+    if (mutex->owner != self)
+      {
+        EnterCriticalSection (&mutex->lock);
+        mutex->owner = self;
+      }
+    if (++(mutex->depth) == 0) /* wraparound? */
+      {
+        mutex->depth--;
+        return EAGAIN;
+      }
+  }
+  return 0;
+}
+
+int
+glwthread_recmutex_trylock (glwthread_recmutex_t *mutex)
+{
+  if (!mutex->guard.done)
+    {
+      if (InterlockedIncrement (&mutex->guard.started) == 0)
+        /* This thread is the first one to need this mutex.  Initialize it.  */
+        glwthread_recmutex_init (mutex);
+      else
+        {
+          /* Don't let mutex->guard.started grow and wrap around.  */
+          InterlockedDecrement (&mutex->guard.started);
+          /* Let another thread finish initializing this mutex, and let it also
+             lock this mutex.  */
+          return EBUSY;
+        }
+    }
+  {
+    DWORD self = GetCurrentThreadId ();
+    if (mutex->owner != self)
+      {
+        if (!TryEnterCriticalSection (&mutex->lock))
+          return EBUSY;
+        mutex->owner = self;
+      }
+    if (++(mutex->depth) == 0) /* wraparound? */
+      {
+        mutex->depth--;
+        return EAGAIN;
+      }
+  }
+  return 0;
+}
+
+int
+glwthread_recmutex_unlock (glwthread_recmutex_t *mutex)
+{
+  if (mutex->owner != GetCurrentThreadId ())
+    return EPERM;
+  if (mutex->depth == 0)
+    return EINVAL;
+  if (--(mutex->depth) == 0)
+    {
+      mutex->owner = 0;
+      LeaveCriticalSection (&mutex->lock);
+    }
+  return 0;
+}
+
+int
+glwthread_recmutex_destroy (glwthread_recmutex_t *mutex)
+{
+  if (mutex->owner != 0)
+    return EBUSY;
+  DeleteCriticalSection (&mutex->lock);
+  mutex->guard.done = 0;
+  return 0;
+}
diff --git a/src/grep/lib/windows-recmutex.h b/src/grep/lib/windows-recmutex.h
new file mode 100644
index 0000000..174fe73
--- /dev/null
+++ b/src/grep/lib/windows-recmutex.h
@@ -0,0 +1,57 @@
+/* Plain recursive mutexes (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-win32.h.  */
+
+#ifndef _WINDOWS_RECMUTEX_H
+#define _WINDOWS_RECMUTEX_H
+
+#define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#include <windows.h>
+
+#include "windows-initguard.h"
+
+/* The native Windows documentation says that CRITICAL_SECTION already
+   implements a recursive lock.  But we need not rely on it: It's easy to
+   implement a recursive lock without this assumption.  */
+
+typedef struct
+        {
+          glwthread_initguard_t guard; /* protects the initialization */
+          DWORD owner;
+          unsigned long depth;
+          CRITICAL_SECTION lock;
+        }
+        glwthread_recmutex_t;
+
+#define GLWTHREAD_RECMUTEX_INIT { GLWTHREAD_INITGUARD_INIT, 0, 0 }
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern void glwthread_recmutex_init (glwthread_recmutex_t *mutex);
+extern int glwthread_recmutex_lock (glwthread_recmutex_t *mutex);
+extern int glwthread_recmutex_trylock (glwthread_recmutex_t *mutex);
+extern int glwthread_recmutex_unlock (glwthread_recmutex_t *mutex);
+extern int glwthread_recmutex_destroy (glwthread_recmutex_t *mutex);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _WINDOWS_RECMUTEX_H */
diff --git a/src/grep/lib/windows-rwlock.c b/src/grep/lib/windows-rwlock.c
new file mode 100644
index 0000000..d63936c
--- /dev/null
+++ b/src/grep/lib/windows-rwlock.c
@@ -0,0 +1,377 @@
+/* Read-write locks (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-win32.h.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "windows-rwlock.h"
+
+#include <errno.h>
+#include <stdlib.h>
+
+/* Don't assume that UNICODE is not defined.  */
+#undef CreateEvent
+#define CreateEvent CreateEventA
+
+/* In this file, the waitqueues are implemented as circular arrays.  */
+#define glwthread_waitqueue_t glwthread_carray_waitqueue_t
+
+static void
+glwthread_waitqueue_init (glwthread_waitqueue_t *wq)
+{
+  wq->array = NULL;
+  wq->count = 0;
+  wq->alloc = 0;
+  wq->offset = 0;
+}
+
+/* Enqueues the current thread, represented by an event, in a wait queue.
+   Returns INVALID_HANDLE_VALUE if an allocation failure occurs.  */
+static HANDLE
+glwthread_waitqueue_add (glwthread_waitqueue_t *wq)
+{
+  HANDLE event;
+  unsigned int index;
+
+  if (wq->count == wq->alloc)
+    {
+      unsigned int new_alloc = 2 * wq->alloc + 1;
+      HANDLE *new_array =
+        (HANDLE *) realloc (wq->array, new_alloc * sizeof (HANDLE));
+      if (new_array == NULL)
+        /* No more memory.  */
+        return INVALID_HANDLE_VALUE;
+      /* Now is a good opportunity to rotate the array so that its contents
+         starts at offset 0.  */
+      if (wq->offset > 0)
+        {
+          unsigned int old_count = wq->count;
+          unsigned int old_alloc = wq->alloc;
+          unsigned int old_offset = wq->offset;
+          unsigned int i;
+          if (old_offset + old_count > old_alloc)
+            {
+              unsigned int limit = old_offset + old_count - old_alloc;
+              for (i = 0; i < limit; i++)
+                new_array[old_alloc + i] = new_array[i];
+            }
+          for (i = 0; i < old_count; i++)
+            new_array[i] = new_array[old_offset + i];
+          wq->offset = 0;
+        }
+      wq->array = new_array;
+      wq->alloc = new_alloc;
+    }
+  /* Whether the created event is a manual-reset one or an auto-reset one,
+     does not matter, since we will wait on it only once.  */
+  event = CreateEvent (NULL, TRUE, FALSE, NULL);
+  if (event == INVALID_HANDLE_VALUE)
+    /* No way to allocate an event.  */
+    return INVALID_HANDLE_VALUE;
+  index = wq->offset + wq->count;
+  if (index >= wq->alloc)
+    index -= wq->alloc;
+  wq->array[index] = event;
+  wq->count++;
+  return event;
+}
+
+/* Notifies the first thread from a wait queue and dequeues it.  */
+static void
+glwthread_waitqueue_notify_first (glwthread_waitqueue_t *wq)
+{
+  SetEvent (wq->array[wq->offset + 0]);
+  wq->offset++;
+  wq->count--;
+  if (wq->count == 0 || wq->offset == wq->alloc)
+    wq->offset = 0;
+}
+
+/* Notifies all threads from a wait queue and dequeues them all.  */
+static void
+glwthread_waitqueue_notify_all (glwthread_waitqueue_t *wq)
+{
+  unsigned int i;
+
+  for (i = 0; i < wq->count; i++)
+    {
+      unsigned int index = wq->offset + i;
+      if (index >= wq->alloc)
+        index -= wq->alloc;
+      SetEvent (wq->array[index]);
+    }
+  wq->count = 0;
+  wq->offset = 0;
+}
+
+void
+glwthread_rwlock_init (glwthread_rwlock_t *lock)
+{
+  InitializeCriticalSection (&lock->lock);
+  glwthread_waitqueue_init (&lock->waiting_readers);
+  glwthread_waitqueue_init (&lock->waiting_writers);
+  lock->runcount = 0;
+  lock->guard.done = 1;
+}
+
+int
+glwthread_rwlock_rdlock (glwthread_rwlock_t *lock)
+{
+  if (!lock->guard.done)
+    {
+      if (InterlockedIncrement (&lock->guard.started) == 0)
+        /* This thread is the first one to need this lock.  Initialize it.  */
+        glwthread_rwlock_init (lock);
+      else
+        {
+          /* Don't let lock->guard.started grow and wrap around.  */
+          InterlockedDecrement (&lock->guard.started);
+          /* Yield the CPU while waiting for another thread to finish
+             initializing this lock.  */
+          while (!lock->guard.done)
+            Sleep (0);
+        }
+    }
+  EnterCriticalSection (&lock->lock);
+  /* Test whether only readers are currently running, and whether the runcount
+     field will not overflow, and whether no writer is waiting.  The latter
+     condition is because POSIX recommends that "write locks shall take
+     precedence over read locks", to avoid "writer starvation".  */
+  if (!(lock->runcount + 1 > 0 && lock->waiting_writers.count == 0))
+    {
+      /* This thread has to wait for a while.  Enqueue it among the
+         waiting_readers.  */
+      HANDLE event = glwthread_waitqueue_add (&lock->waiting_readers);
+      if (event != INVALID_HANDLE_VALUE)
+        {
+          DWORD result;
+          LeaveCriticalSection (&lock->lock);
+          /* Wait until another thread signals this event.  */
+          result = WaitForSingleObject (event, INFINITE);
+          if (result == WAIT_FAILED || result == WAIT_TIMEOUT)
+            abort ();
+          CloseHandle (event);
+          /* The thread which signalled the event already did the bookkeeping:
+             removed us from the waiting_readers, incremented lock->runcount.  */
+          if (!(lock->runcount > 0))
+            abort ();
+          return 0;
+        }
+      else
+        {
+          /* Allocation failure.  Weird.  */
+          do
+            {
+              LeaveCriticalSection (&lock->lock);
+              Sleep (1);
+              EnterCriticalSection (&lock->lock);
+            }
+          while (!(lock->runcount + 1 > 0));
+        }
+    }
+  lock->runcount++;
+  LeaveCriticalSection (&lock->lock);
+  return 0;
+}
+
+int
+glwthread_rwlock_wrlock (glwthread_rwlock_t *lock)
+{
+  if (!lock->guard.done)
+    {
+      if (InterlockedIncrement (&lock->guard.started) == 0)
+        /* This thread is the first one to need this lock.  Initialize it.  */
+        glwthread_rwlock_init (lock);
+      else
+        {
+          /* Don't let lock->guard.started grow and wrap around.  */
+          InterlockedDecrement (&lock->guard.started);
+          /* Yield the CPU while waiting for another thread to finish
+             initializing this lock.  */
+          while (!lock->guard.done)
+            Sleep (0);
+        }
+    }
+  EnterCriticalSection (&lock->lock);
+  /* Test whether no readers or writers are currently running.  */
+  if (!(lock->runcount == 0))
+    {
+      /* This thread has to wait for a while.  Enqueue it among the
+         waiting_writers.  */
+      HANDLE event = glwthread_waitqueue_add (&lock->waiting_writers);
+      if (event != INVALID_HANDLE_VALUE)
+        {
+          DWORD result;
+          LeaveCriticalSection (&lock->lock);
+          /* Wait until another thread signals this event.  */
+          result = WaitForSingleObject (event, INFINITE);
+          if (result == WAIT_FAILED || result == WAIT_TIMEOUT)
+            abort ();
+          CloseHandle (event);
+          /* The thread which signalled the event already did the bookkeeping:
+             removed us from the waiting_writers, set lock->runcount = -1.  */
+          if (!(lock->runcount == -1))
+            abort ();
+          return 0;
+        }
+      else
+        {
+          /* Allocation failure.  Weird.  */
+          do
+            {
+              LeaveCriticalSection (&lock->lock);
+              Sleep (1);
+              EnterCriticalSection (&lock->lock);
+            }
+          while (!(lock->runcount == 0));
+        }
+    }
+  lock->runcount--; /* runcount becomes -1 */
+  LeaveCriticalSection (&lock->lock);
+  return 0;
+}
+
+int
+glwthread_rwlock_tryrdlock (glwthread_rwlock_t *lock)
+{
+  if (!lock->guard.done)
+    {
+      if (InterlockedIncrement (&lock->guard.started) == 0)
+        /* This thread is the first one to need this lock.  Initialize it.  */
+        glwthread_rwlock_init (lock);
+      else
+        {
+          /* Don't let lock->guard.started grow and wrap around.  */
+          InterlockedDecrement (&lock->guard.started);
+          /* Yield the CPU while waiting for another thread to finish
+             initializing this lock.  */
+          while (!lock->guard.done)
+            Sleep (0);
+        }
+    }
+  /* It's OK to wait for this critical section, because it is never taken for a
+     long time.  */
+  EnterCriticalSection (&lock->lock);
+  /* Test whether only readers are currently running, and whether the runcount
+     field will not overflow, and whether no writer is waiting.  The latter
+     condition is because POSIX recommends that "write locks shall take
+     precedence over read locks", to avoid "writer starvation".  */
+  if (!(lock->runcount + 1 > 0 && lock->waiting_writers.count == 0))
+    {
+      /* This thread would have to wait for a while.  Return instead.  */
+      LeaveCriticalSection (&lock->lock);
+      return EBUSY;
+    }
+  lock->runcount++;
+  LeaveCriticalSection (&lock->lock);
+  return 0;
+}
+
+int
+glwthread_rwlock_trywrlock (glwthread_rwlock_t *lock)
+{
+  if (!lock->guard.done)
+    {
+      if (InterlockedIncrement (&lock->guard.started) == 0)
+        /* This thread is the first one to need this lock.  Initialize it.  */
+        glwthread_rwlock_init (lock);
+      else
+        {
+          /* Don't let lock->guard.started grow and wrap around.  */
+          InterlockedDecrement (&lock->guard.started);
+          /* Yield the CPU while waiting for another thread to finish
+             initializing this lock.  */
+          while (!lock->guard.done)
+            Sleep (0);
+        }
+    }
+  /* It's OK to wait for this critical section, because it is never taken for a
+     long time.  */
+  EnterCriticalSection (&lock->lock);
+  /* Test whether no readers or writers are currently running.  */
+  if (!(lock->runcount == 0))
+    {
+      /* This thread would have to wait for a while.  Return instead.  */
+      LeaveCriticalSection (&lock->lock);
+      return EBUSY;
+    }
+  lock->runcount--; /* runcount becomes -1 */
+  LeaveCriticalSection (&lock->lock);
+  return 0;
+}
+
+int
+glwthread_rwlock_unlock (glwthread_rwlock_t *lock)
+{
+  if (!lock->guard.done)
+    return EINVAL;
+  EnterCriticalSection (&lock->lock);
+  if (lock->runcount < 0)
+    {
+      /* Drop a writer lock.  */
+      if (!(lock->runcount == -1))
+        abort ();
+      lock->runcount = 0;
+    }
+  else
+    {
+      /* Drop a reader lock.  */
+      if (!(lock->runcount > 0))
+        {
+          LeaveCriticalSection (&lock->lock);
+          return EPERM;
+        }
+      lock->runcount--;
+    }
+  if (lock->runcount == 0)
+    {
+      /* POSIX recommends that "write locks shall take precedence over read
+         locks", to avoid "writer starvation".  */
+      if (lock->waiting_writers.count > 0)
+        {
+          /* Wake up one of the waiting writers.  */
+          lock->runcount--;
+          glwthread_waitqueue_notify_first (&lock->waiting_writers);
+        }
+      else
+        {
+          /* Wake up all waiting readers.  */
+          lock->runcount += lock->waiting_readers.count;
+          glwthread_waitqueue_notify_all (&lock->waiting_readers);
+        }
+    }
+  LeaveCriticalSection (&lock->lock);
+  return 0;
+}
+
+int
+glwthread_rwlock_destroy (glwthread_rwlock_t *lock)
+{
+  if (!lock->guard.done)
+    return EINVAL;
+  if (lock->runcount != 0)
+    return EBUSY;
+  DeleteCriticalSection (&lock->lock);
+  if (lock->waiting_readers.array != NULL)
+    free (lock->waiting_readers.array);
+  if (lock->waiting_writers.array != NULL)
+    free (lock->waiting_writers.array);
+  lock->guard.done = 0;
+  return 0;
+}
diff --git a/src/grep/lib/windows-rwlock.h b/src/grep/lib/windows-rwlock.h
new file mode 100644
index 0000000..280c9f2
--- /dev/null
+++ b/src/grep/lib/windows-rwlock.h
@@ -0,0 +1,68 @@
+/* Read-write locks (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-win32.h.  */
+
+#ifndef _WINDOWS_RWLOCK_H
+#define _WINDOWS_RWLOCK_H
+
+#define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#include <windows.h>
+
+#include "windows-initguard.h"
+
+/* It is impossible to implement read-write locks using plain locks, without
+   introducing an extra thread dedicated to managing read-write locks.
+   Therefore here we need to use the low-level Event type.  */
+
+typedef struct
+        {
+          HANDLE *array; /* array of waiting threads, each represented by an event */
+          unsigned int count; /* number of waiting threads */
+          unsigned int alloc; /* length of allocated array */
+          unsigned int offset; /* index of first waiting thread in array */
+        }
+        glwthread_carray_waitqueue_t;
+typedef struct
+        {
+          glwthread_initguard_t guard; /* protects the initialization */
+          CRITICAL_SECTION lock; /* protects the remaining fields */
+          glwthread_carray_waitqueue_t waiting_readers; /* waiting readers */
+          glwthread_carray_waitqueue_t waiting_writers; /* waiting writers */
+          int runcount; /* number of readers running, or -1 when a writer runs */
+        }
+        glwthread_rwlock_t;
+
+#define GLWTHREAD_RWLOCK_INIT { GLWTHREAD_INITGUARD_INIT }
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern void glwthread_rwlock_init (glwthread_rwlock_t *lock);
+extern int glwthread_rwlock_rdlock (glwthread_rwlock_t *lock);
+extern int glwthread_rwlock_wrlock (glwthread_rwlock_t *lock);
+extern int glwthread_rwlock_tryrdlock (glwthread_rwlock_t *lock);
+extern int glwthread_rwlock_trywrlock (glwthread_rwlock_t *lock);
+extern int glwthread_rwlock_unlock (glwthread_rwlock_t *lock);
+extern int glwthread_rwlock_destroy (glwthread_rwlock_t *lock);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _WINDOWS_RWLOCK_H */
diff --git a/src/grep/lib/wmemchr-impl.h b/src/grep/lib/wmemchr-impl.h
new file mode 100644
index 0000000..9cb4b20
--- /dev/null
+++ b/src/grep/lib/wmemchr-impl.h
@@ -0,0 +1,27 @@
+/* Search wide character array for a wide character.
+   Copyright (C) 1999, 2011-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 1999.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+wchar_t *
+wmemchr (const wchar_t *s, wchar_t c, size_t n)
+{
+  for (; n > 0; s++, n--)
+    {
+      if (*s == c)
+        return (wchar_t *) s;
+    }
+  return NULL;
+}
diff --git a/src/grep/lib/wmemchr.c b/src/grep/lib/wmemchr.c
new file mode 100644
index 0000000..78742e2
--- /dev/null
+++ b/src/grep/lib/wmemchr.c
@@ -0,0 +1,23 @@
+/* Search wide character array for a wide character.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2011.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <wchar.h>
+
+#include "wmemchr-impl.h"
diff --git a/src/grep/lib/wmempcpy.c b/src/grep/lib/wmempcpy.c
new file mode 100644
index 0000000..1d7588a
--- /dev/null
+++ b/src/grep/lib/wmempcpy.c
@@ -0,0 +1,28 @@
+/* Copy wide character array, return pointer after last written wide character.
+   Copyright (C) 2020-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <wchar.h>
+
+/* Copy N wide characters of SRC to DEST.
+   Return pointer to wide characters after the last written wide character.  */
+wchar_t *
+wmempcpy (wchar_t *dest, const wchar_t *src, size_t n)
+{
+  return wmemcpy (dest, src, n) + n;
+}
diff --git a/src/grep/lib/xalloc-die.c b/src/grep/lib/xalloc-die.c
new file mode 100644
index 0000000..1bf0a9e
--- /dev/null
+++ b/src/grep/lib/xalloc-die.c
@@ -0,0 +1,41 @@
+/* Report a memory allocation failure and exit.
+
+   Copyright (C) 1997-2000, 2002-2004, 2006, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "xalloc.h"
+
+#include <stdlib.h>
+
+#include "error.h"
+#include "exitfail.h"
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+void
+xalloc_die (void)
+{
+  error (exit_failure, 0, "%s", _("memory exhausted"));
+
+  /* _Noreturn cannot be given to error, since it may return if
+     its first argument is 0.  To help compilers understand the
+     xalloc_die does not return, call abort.  Also, the abort is a
+     safety feature if exit_failure is 0 (which shouldn't happen).  */
+  abort ();
+}
diff --git a/src/grep/lib/xalloc-oversized.h b/src/grep/lib/xalloc-oversized.h
new file mode 100644
index 0000000..4184f33
--- /dev/null
+++ b/src/grep/lib/xalloc-oversized.h
@@ -0,0 +1,65 @@
+/* xalloc-oversized.h -- memory allocation size checking
+
+   Copyright (C) 1990-2000, 2003-2004, 2006-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef XALLOC_OVERSIZED_H_
+#define XALLOC_OVERSIZED_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+/* True if N * S does not fit into both ptrdiff_t and size_t.
+   N and S should be nonnegative and free of side effects.
+   This expands to a constant expression if N and S are both constants.
+   By gnulib convention, SIZE_MAX represents overflow in size_t
+   calculations, so the conservative size_t-based dividend to use here
+   is SIZE_MAX - 1.  */
+#define __xalloc_oversized(n, s) \
+  ((s) != 0 \
+   && ((size_t) (PTRDIFF_MAX < SIZE_MAX ? PTRDIFF_MAX : SIZE_MAX - 1) / (s) \
+       < (n)))
+
+/* Return 1 if and only if an array of N objects, each of size S,
+   cannot exist reliably because its total size in bytes would exceed
+   MIN (PTRDIFF_MAX, SIZE_MAX - 1).
+
+   N and S should be nonnegative and free of side effects.
+
+   Warning: (xalloc_oversized (N, S) ? NULL : malloc (N * S)) can
+   misbehave if N and S are both narrower than ptrdiff_t and size_t,
+   and can be rewritten as (xalloc_oversized (N, S) ?  NULL
+   : malloc (N * (size_t) S)).
+
+   This is a macro, not a function, so that it works even if an
+   argument exceeds MAX (PTRDIFF_MAX, SIZE_MAX).  */
+#if 7 <= __GNUC__ && !defined __clang__ && PTRDIFF_MAX < SIZE_MAX
+# define xalloc_oversized(n, s) \
+   __builtin_mul_overflow_p (n, s, (ptrdiff_t) 1)
+#elif (5 <= __GNUC__ && !defined __ICC && !__STRICT_ANSI__ \
+       && PTRDIFF_MAX < SIZE_MAX)
+# define xalloc_oversized(n, s) \
+   (__builtin_constant_p (n) && __builtin_constant_p (s) \
+    ? __xalloc_oversized (n, s) \
+    : ({ ptrdiff_t __xalloc_count; \
+         __builtin_mul_overflow (n, s, &__xalloc_count); }))
+
+/* Other compilers use integer division; this may be slower but is
+   more portable.  */
+#else
+# define xalloc_oversized(n, s) __xalloc_oversized (n, s)
+#endif
+
+#endif /* !XALLOC_OVERSIZED_H_ */
diff --git a/src/grep/lib/xalloc.h b/src/grep/lib/xalloc.h
new file mode 100644
index 0000000..ee07113
--- /dev/null
+++ b/src/grep/lib/xalloc.h
@@ -0,0 +1,210 @@
+/* xalloc.h -- malloc with out-of-memory checking
+
+   Copyright (C) 1990-2000, 2003-2004, 2006-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef XALLOC_H_
+#define XALLOC_H_
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#if GNULIB_XALLOC
+# include "idx.h"
+# include "intprops.h"
+#endif
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef XALLOC_INLINE
+# define XALLOC_INLINE _GL_INLINE
+#endif
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+#if GNULIB_XALLOC_DIE
+
+/* This function is always triggered when memory is exhausted.
+   It must be defined by the application, either explicitly
+   or by using gnulib's xalloc-die module.  This is the
+   function to call when one wants the program to die because of a
+   memory allocation failure.  */
+/*extern*/ _Noreturn void xalloc_die (void);
+
+#endif /* GNULIB_XALLOC_DIE */
+
+#if GNULIB_XALLOC
+
+void *xmalloc (size_t s)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_ALLOC_SIZE ((1)) _GL_ATTRIBUTE_RETURNS_NONNULL;
+void *ximalloc (idx_t s)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_ALLOC_SIZE ((1)) _GL_ATTRIBUTE_RETURNS_NONNULL;
+void *xzalloc (size_t s)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_ALLOC_SIZE ((1)) _GL_ATTRIBUTE_RETURNS_NONNULL;
+void *xizalloc (idx_t s)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_ALLOC_SIZE ((1)) _GL_ATTRIBUTE_RETURNS_NONNULL;
+void *xcalloc (size_t n, size_t s)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_ALLOC_SIZE ((1, 2)) _GL_ATTRIBUTE_RETURNS_NONNULL;
+void *xicalloc (idx_t n, idx_t s)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_ALLOC_SIZE ((1, 2)) _GL_ATTRIBUTE_RETURNS_NONNULL;
+void *xrealloc (void *p, size_t s)
+  _GL_ATTRIBUTE_ALLOC_SIZE ((2));
+void *xirealloc (void *p, idx_t s)
+  _GL_ATTRIBUTE_ALLOC_SIZE ((2)) _GL_ATTRIBUTE_RETURNS_NONNULL;
+void *xreallocarray (void *p, size_t n, size_t s)
+  _GL_ATTRIBUTE_ALLOC_SIZE ((2, 3));
+void *xireallocarray (void *p, idx_t n, idx_t s)
+  _GL_ATTRIBUTE_ALLOC_SIZE ((2, 3)) _GL_ATTRIBUTE_RETURNS_NONNULL;
+void *x2realloc (void *p, size_t *ps) /* superseded by xpalloc */
+  _GL_ATTRIBUTE_RETURNS_NONNULL;
+void *x2nrealloc (void *p, size_t *pn, size_t s) /* superseded by xpalloc */
+  _GL_ATTRIBUTE_RETURNS_NONNULL;
+void *xpalloc (void *pa, idx_t *pn, idx_t n_incr_min, ptrdiff_t n_max, idx_t s)
+  _GL_ATTRIBUTE_RETURNS_NONNULL;
+void *xmemdup (void const *p, size_t s)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_ALLOC_SIZE ((2)) _GL_ATTRIBUTE_RETURNS_NONNULL;
+void *ximemdup (void const *p, idx_t s)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_ALLOC_SIZE ((2)) _GL_ATTRIBUTE_RETURNS_NONNULL;
+char *ximemdup0 (void const *p, idx_t s)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_RETURNS_NONNULL;
+char *xstrdup (char const *str)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_RETURNS_NONNULL;
+
+/* In the following macros, T must be an elementary or structure/union or
+   typedef'ed type, or a pointer to such a type.  To apply one of the
+   following macros to a function pointer or array type, you need to typedef
+   it first and use the typedef name.  */
+
+/* Allocate an object of type T dynamically, with error checking.  */
+/* extern t *XMALLOC (typename t); */
+# define XMALLOC(t) ((t *) xmalloc (sizeof (t)))
+
+/* Allocate memory for N elements of type T, with error checking.  */
+/* extern t *XNMALLOC (size_t n, typename t); */
+# define XNMALLOC(n, t) \
+    ((t *) (sizeof (t) == 1 ? xmalloc (n) : xnmalloc (n, sizeof (t))))
+
+/* Allocate an object of type T dynamically, with error checking,
+   and zero it.  */
+/* extern t *XZALLOC (typename t); */
+# define XZALLOC(t) ((t *) xzalloc (sizeof (t)))
+
+/* Allocate memory for N elements of type T, with error checking,
+   and zero it.  */
+/* extern t *XCALLOC (size_t n, typename t); */
+# define XCALLOC(n, t) \
+    ((t *) (sizeof (t) == 1 ? xzalloc (n) : xcalloc (n, sizeof (t))))
+
+
+/* Allocate an array of N objects, each with S bytes of memory,
+   dynamically, with error checking.  S must be nonzero.  */
+
+void *xnmalloc (size_t n, size_t s)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_ALLOC_SIZE ((1, 2)) _GL_ATTRIBUTE_RETURNS_NONNULL;
+
+/* FIXME: Deprecate this in favor of xreallocarray?  */
+/* Change the size of an allocated block of memory P to an array of N
+   objects each of S bytes, with error checking.  S must be nonzero.  */
+
+XALLOC_INLINE void *xnrealloc (void *p, size_t n, size_t s)
+  _GL_ATTRIBUTE_ALLOC_SIZE ((2, 3));
+XALLOC_INLINE void *
+xnrealloc (void *p, size_t n, size_t s)
+{
+  return xreallocarray (p, n, s);
+}
+
+/* Return a pointer to a new buffer of N bytes.  This is like xmalloc,
+   except it returns char *.  */
+
+char *xcharalloc (size_t n)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_ALLOC_SIZE ((1)) _GL_ATTRIBUTE_RETURNS_NONNULL;
+
+#endif /* GNULIB_XALLOC */
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#if GNULIB_XALLOC && defined __cplusplus
+
+/* C++ does not allow conversions from void * to other pointer types
+   without a cast.  Use templates to work around the problem when
+   possible.  */
+
+template <typename T> inline T *
+xrealloc (T *p, size_t s)
+{
+  return (T *) xrealloc ((void *) p, s);
+}
+
+template <typename T> inline T *
+xreallocarray (T *p, size_t n, size_t s)
+{
+  return (T *) xreallocarray ((void *) p, n, s);
+}
+
+/* FIXME: Deprecate this in favor of xreallocarray?  */
+template <typename T> inline T *
+xnrealloc (T *p, size_t n, size_t s)
+{
+  return xreallocarray (p, n, s);
+}
+
+template <typename T> inline T *
+x2realloc (T *p, size_t *pn)
+{
+  return (T *) x2realloc ((void *) p, pn);
+}
+
+template <typename T> inline T *
+x2nrealloc (T *p, size_t *pn, size_t s)
+{
+  return (T *) x2nrealloc ((void *) p, pn, s);
+}
+
+template <typename T> inline T *
+xmemdup (T const *p, size_t s)
+{
+  return (T *) xmemdup ((void const *) p, s);
+}
+
+#endif /* GNULIB_XALLOC && C++ */
+
+
+_GL_INLINE_HEADER_END
+
+#endif /* !XALLOC_H_ */
diff --git a/src/grep/lib/xbinary-io.c b/src/grep/lib/xbinary-io.c
new file mode 100644
index 0000000..c53418e
--- /dev/null
+++ b/src/grep/lib/xbinary-io.c
@@ -0,0 +1,41 @@
+/* Binary mode I/O with checking
+   Copyright 2017-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#define XBINARY_IO_INLINE _GL_EXTERN_INLINE
+#include "xbinary-io.h"
+
+#include <errno.h>
+#include <error.h>
+#include <stdbool.h>
+#include "exitfail.h"
+#include "verify.h"
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+#if O_BINARY
+
+_Noreturn void
+xset_binary_mode_error (void)
+{
+  error (exit_failure, errno,
+         _("failed to set file descriptor text/binary mode"));
+  assume (false);
+}
+
+#endif
diff --git a/src/grep/lib/xbinary-io.h b/src/grep/lib/xbinary-io.h
new file mode 100644
index 0000000..ef377d9
--- /dev/null
+++ b/src/grep/lib/xbinary-io.h
@@ -0,0 +1,48 @@
+/* Binary mode I/O with checking
+   Copyright 2017-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _XBINARY_IO_H
+#define _XBINARY_IO_H
+
+#include "binary-io.h"
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef XBINARY_IO_INLINE
+# define XBINARY_IO_INLINE _GL_INLINE
+#endif
+
+#if O_BINARY
+extern _Noreturn void xset_binary_mode_error (void);
+#else
+XBINARY_IO_INLINE void xset_binary_mode_error (void) {}
+#endif
+
+/* Set the mode of FD to MODE, which should be either O_TEXT or O_BINARY.
+   Report an error and exit if this fails.  */
+
+XBINARY_IO_INLINE void
+xset_binary_mode (int fd, int mode)
+{
+  if (set_binary_mode (fd, mode) < 0)
+    xset_binary_mode_error ();
+}
+
+_GL_INLINE_HEADER_END
+
+#endif /* _XBINARY_IO_H */
diff --git a/src/grep/lib/xmalloc.c b/src/grep/lib/xmalloc.c
new file mode 100644
index 0000000..51a0832
--- /dev/null
+++ b/src/grep/lib/xmalloc.c
@@ -0,0 +1,333 @@
+/* xmalloc.c -- malloc with out of memory checking
+
+   Copyright (C) 1990-2000, 2002-2006, 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#define XALLOC_INLINE _GL_EXTERN_INLINE
+
+#include "xalloc.h"
+
+#include "ialloc.h"
+#include "intprops.h"
+#include "minmax.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+static void * _GL_ATTRIBUTE_PURE
+nonnull (void *p)
+{
+  if (!p)
+    xalloc_die ();
+  return p;
+}
+
+/* Allocate S bytes of memory dynamically, with error checking.  */
+
+void *
+xmalloc (size_t s)
+{
+  return nonnull (malloc (s));
+}
+
+void *
+ximalloc (idx_t s)
+{
+  return nonnull (imalloc (s));
+}
+
+char *
+xcharalloc (size_t n)
+{
+  return XNMALLOC (n, char);
+}
+
+/* Change the size of an allocated block of memory P to S bytes,
+   with error checking.  */
+
+void *
+xrealloc (void *p, size_t s)
+{
+  void *r = realloc (p, s);
+  if (!r && (!p || s))
+    xalloc_die ();
+  return r;
+}
+
+void *
+xirealloc (void *p, idx_t s)
+{
+  return nonnull (irealloc (p, s));
+}
+
+/* Change the size of an allocated block of memory P to an array of N
+   objects each of S bytes, with error checking.  */
+
+void *
+xreallocarray (void *p, size_t n, size_t s)
+{
+  void *r = reallocarray (p, n, s);
+  if (!r && (!p || (n && s)))
+    xalloc_die ();
+  return r;
+}
+
+void *
+xireallocarray (void *p, idx_t n, idx_t s)
+{
+  return nonnull (ireallocarray (p, n, s));
+}
+
+/* Allocate an array of N objects, each with S bytes of memory,
+   dynamically, with error checking.  S must be nonzero.  */
+
+void *
+xnmalloc (size_t n, size_t s)
+{
+  return xreallocarray (NULL, n, s);
+}
+
+/* If P is null, allocate a block of at least *PS bytes; otherwise,
+   reallocate P so that it contains more than *PS bytes.  *PS must be
+   nonzero unless P is null.  Set *PS to the new block's size, and
+   return the pointer to the new block.  *PS is never set to zero, and
+   the returned pointer is never null.  */
+
+void *
+x2realloc (void *p, size_t *ps)
+{
+  return x2nrealloc (p, ps, 1);
+}
+
+/* If P is null, allocate a block of at least *PN such objects;
+   otherwise, reallocate P so that it contains more than *PN objects
+   each of S bytes.  S must be nonzero.  Set *PN to the new number of
+   objects, and return the pointer to the new block.  *PN is never set
+   to zero, and the returned pointer is never null.
+
+   Repeated reallocations are guaranteed to make progress, either by
+   allocating an initial block with a nonzero size, or by allocating a
+   larger block.
+
+   In the following implementation, nonzero sizes are increased by a
+   factor of approximately 1.5 so that repeated reallocations have
+   O(N) overall cost rather than O(N**2) cost, but the
+   specification for this function does not guarantee that rate.
+
+   Here is an example of use:
+
+     int *p = NULL;
+     size_t used = 0;
+     size_t allocated = 0;
+
+     void
+     append_int (int value)
+       {
+         if (used == allocated)
+           p = x2nrealloc (p, &allocated, sizeof *p);
+         p[used++] = value;
+       }
+
+   This causes x2nrealloc to allocate a block of some nonzero size the
+   first time it is called.
+
+   To have finer-grained control over the initial size, set *PN to a
+   nonzero value before calling this function with P == NULL.  For
+   example:
+
+     int *p = NULL;
+     size_t used = 0;
+     size_t allocated = 0;
+     size_t allocated1 = 1000;
+
+     void
+     append_int (int value)
+       {
+         if (used == allocated)
+           {
+             p = x2nrealloc (p, &allocated1, sizeof *p);
+             allocated = allocated1;
+           }
+         p[used++] = value;
+       }
+
+   */
+
+void *
+x2nrealloc (void *p, size_t *pn, size_t s)
+{
+  size_t n = *pn;
+
+  if (! p)
+    {
+      if (! n)
+        {
+          /* The approximate size to use for initial small allocation
+             requests, when the invoking code specifies an old size of
+             zero.  This is the largest "small" request for the GNU C
+             library malloc.  */
+          enum { DEFAULT_MXFAST = 64 * sizeof (size_t) / 4 };
+
+          n = DEFAULT_MXFAST / s;
+          n += !n;
+        }
+    }
+  else
+    {
+      /* Set N = floor (1.5 * N) + 1 to make progress even if N == 0.  */
+      if (INT_ADD_WRAPV (n, (n >> 1) + 1, &n))
+        xalloc_die ();
+    }
+
+  p = xreallocarray (p, n, s);
+  *pn = n;
+  return p;
+}
+
+/* Grow PA, which points to an array of *PN items, and return the
+   location of the reallocated array, updating *PN to reflect its
+   new size.  The new array will contain at least N_INCR_MIN more
+   items, but will not contain more than N_MAX items total.
+   S is the size of each item, in bytes.
+
+   S and N_INCR_MIN must be positive.  *PN must be
+   nonnegative.  If N_MAX is -1, it is treated as if it were
+   infinity.
+
+   If PA is null, then allocate a new array instead of reallocating
+   the old one.
+
+   Thus, to grow an array A without saving its old contents, do
+   { free (A); A = xpalloc (NULL, &AITEMS, ...); }.  */
+
+void *
+xpalloc (void *pa, idx_t *pn, idx_t n_incr_min, ptrdiff_t n_max, idx_t s)
+{
+  idx_t n0 = *pn;
+
+  /* The approximate size to use for initial small allocation
+     requests.  This is the largest "small" request for the GNU C
+     library malloc.  */
+  enum { DEFAULT_MXFAST = 64 * sizeof (size_t) / 4 };
+
+  /* If the array is tiny, grow it to about (but no greater than)
+     DEFAULT_MXFAST bytes.  Otherwise, grow it by about 50%.
+     Adjust the growth according to three constraints: N_INCR_MIN,
+     N_MAX, and what the C language can represent safely.  */
+
+  idx_t n;
+  if (INT_ADD_WRAPV (n0, n0 >> 1, &n))
+    n = IDX_MAX;
+  if (0 <= n_max && n_max < n)
+    n = n_max;
+
+  /* NBYTES is of a type suitable for holding the count of bytes in an object.
+     This is typically idx_t, but it should be size_t on (theoretical?)
+     platforms where SIZE_MAX < IDX_MAX so xpalloc does not pass
+     values greater than SIZE_MAX to xrealloc.  */
+#if IDX_MAX <= SIZE_MAX
+  idx_t nbytes;
+#else
+  size_t nbytes;
+#endif
+  idx_t adjusted_nbytes
+    = (INT_MULTIPLY_WRAPV (n, s, &nbytes)
+       ? MIN (IDX_MAX, SIZE_MAX)
+       : nbytes < DEFAULT_MXFAST ? DEFAULT_MXFAST : 0);
+  if (adjusted_nbytes)
+    {
+      n = adjusted_nbytes / s;
+      nbytes = adjusted_nbytes - adjusted_nbytes % s;
+    }
+
+  if (! pa)
+    *pn = 0;
+  if (n - n0 < n_incr_min
+      && (INT_ADD_WRAPV (n0, n_incr_min, &n)
+          || (0 <= n_max && n_max < n)
+          || INT_MULTIPLY_WRAPV (n, s, &nbytes)))
+    xalloc_die ();
+  pa = xrealloc (pa, nbytes);
+  *pn = n;
+  return pa;
+}
+
+/* Allocate S bytes of zeroed memory dynamically, with error checking.
+   There's no need for xnzalloc (N, S), since it would be equivalent
+   to xcalloc (N, S).  */
+
+void *
+xzalloc (size_t s)
+{
+  return xcalloc (s, 1);
+}
+
+void *
+xizalloc (idx_t s)
+{
+  return xicalloc (s, 1);
+}
+
+/* Allocate zeroed memory for N elements of S bytes, with error
+   checking.  S must be nonzero.  */
+
+void *
+xcalloc (size_t n, size_t s)
+{
+  return nonnull (calloc (n, s));
+}
+
+void *
+xicalloc (idx_t n, idx_t s)
+{
+  return nonnull (icalloc (n, s));
+}
+
+/* Clone an object P of size S, with error checking.  There's no need
+   for xnmemdup (P, N, S), since xmemdup (P, N * S) works without any
+   need for an arithmetic overflow check.  */
+
+void *
+xmemdup (void const *p, size_t s)
+{
+  return memcpy (xmalloc (s), p, s);
+}
+
+void *
+ximemdup (void const *p, idx_t s)
+{
+  return memcpy (ximalloc (s), p, s);
+}
+
+/* Clone an object P of size S, with error checking.  Append
+   a terminating NUL byte.  */
+
+char *
+ximemdup0 (void const *p, idx_t s)
+{
+  char *result = ximalloc (s + 1);
+  result[s] = 0;
+  return memcpy (result, p, s);
+}
+
+/* Clone STRING.  */
+
+char *
+xstrdup (char const *string)
+{
+  return xmemdup (string, strlen (string) + 1);
+}
diff --git a/src/grep/lib/xstriconv.c b/src/grep/lib/xstriconv.c
new file mode 100644
index 0000000..687a00b
--- /dev/null
+++ b/src/grep/lib/xstriconv.c
@@ -0,0 +1,62 @@
+/* Charset conversion with out-of-memory checking.
+   Copyright (C) 2001-2004, 2006, 2009-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "xstriconv.h"
+
+#include <errno.h>
+
+#include "striconv.h"
+#include "xalloc.h"
+
+
+#if HAVE_ICONV
+
+int
+xmem_cd_iconv (const char *src, size_t srclen, iconv_t cd,
+               char **resultp, size_t *lengthp)
+{
+  int retval = mem_cd_iconv (src, srclen, cd, resultp, lengthp);
+
+  if (retval < 0 && errno == ENOMEM)
+    xalloc_die ();
+  return retval;
+}
+
+char *
+xstr_cd_iconv (const char *src, iconv_t cd)
+{
+  char *result = str_cd_iconv (src, cd);
+
+  if (result == NULL && errno == ENOMEM)
+    xalloc_die ();
+  return result;
+}
+
+#endif
+
+char *
+xstr_iconv (const char *src, const char *from_codeset, const char *to_codeset)
+{
+  char *result = str_iconv (src, from_codeset, to_codeset);
+
+  if (result == NULL && errno == ENOMEM)
+    xalloc_die ();
+  return result;
+}
diff --git a/src/grep/lib/xstriconv.h b/src/grep/lib/xstriconv.h
new file mode 100644
index 0000000..879a772
--- /dev/null
+++ b/src/grep/lib/xstriconv.h
@@ -0,0 +1,80 @@
+/* Charset conversion with out-of-memory checking.
+   Copyright (C) 2001-2004, 2006-2007, 2009-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible and Simon Josefsson.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _XSTRICONV_H
+#define _XSTRICONV_H
+
+#include <stdlib.h>
+#if HAVE_ICONV
+#include <iconv.h>
+#endif
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+#if HAVE_ICONV
+
+/* Convert an entire string from one encoding to another, using iconv.
+   The original string is at [SRC,...,SRC+SRCLEN-1].
+   The conversion descriptor is passed as CD.
+   *RESULTP and *LENGTH should initially be a scratch buffer and its size,
+   or *RESULTP can initially be NULL.
+   May erase the contents of the memory at *RESULTP.
+   Upon memory allocation failure, report the error and exit.
+   Return value: 0 if successful, otherwise -1 and errno set.
+   If successful: The resulting string is stored in *RESULTP and its length
+   in *LENGTHP.  *RESULTP is set to a freshly allocated memory block, or is
+   unchanged if no dynamic memory allocation was necessary.  */
+extern int xmem_cd_iconv (const char *src, size_t srclen, iconv_t cd,
+                          char **resultp, size_t *lengthp);
+
+/* Convert an entire string from one encoding to another, using iconv.
+   The original string is the NUL-terminated string starting at SRC.
+   The conversion descriptor is passed as CD.  Both the "from" and the "to"
+   encoding must use a single NUL byte at the end of the string (i.e. not
+   UCS-2, UCS-4, UTF-16, UTF-32).
+   Allocate a malloced memory block for the result.
+   Upon memory allocation failure, report the error and exit.
+   Return value: the freshly allocated resulting NUL-terminated string if
+   successful, otherwise NULL and errno set.  */
+extern char * xstr_cd_iconv (const char *src, iconv_t cd)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE;
+
+#endif
+
+/* Convert an entire string from one encoding to another, using iconv.
+   The original string is the NUL-terminated string starting at SRC.
+   Both the "from" and the "to" encoding must use a single NUL byte at the
+   end of the string (i.e. not UCS-2, UCS-4, UTF-16, UTF-32).
+   Allocate a malloced memory block for the result.
+   Upon memory allocation failure, report the error and exit.
+   Return value: the freshly allocated resulting NUL-terminated string if
+   successful, otherwise NULL and errno set.  */
+extern char * xstr_iconv (const char *src,
+                          const char *from_codeset, const char *to_codeset)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE;
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* _XSTRICONV_H */
diff --git a/src/grep/lib/xstrtoimax.c b/src/grep/lib/xstrtoimax.c
new file mode 100644
index 0000000..17bd54c
--- /dev/null
+++ b/src/grep/lib/xstrtoimax.c
@@ -0,0 +1,23 @@
+/* A more useful interface to strtoimax.
+
+   Copyright (C) 2001-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3 of the License,
+   or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#define __strtol strtoimax
+#define __strtol_t intmax_t
+#define __xstrtol xstrtoimax
+#define STRTOL_T_MINIMUM INTMAX_MIN
+#define STRTOL_T_MAXIMUM INTMAX_MAX
+#include "xstrtol.c"
diff --git a/src/grep/lib/xstrtol.c b/src/grep/lib/xstrtol.c
new file mode 100644
index 0000000..2eab22a
--- /dev/null
+++ b/src/grep/lib/xstrtol.c
@@ -0,0 +1,237 @@
+/* A more useful interface to strtol.
+
+   Copyright (C) 1995-1996, 1998-2001, 2003-2007, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering. */
+
+#ifndef __strtol
+# define __strtol strtol
+# define __strtol_t long int
+# define __xstrtol xstrtol
+# define STRTOL_T_MINIMUM LONG_MIN
+# define STRTOL_T_MAXIMUM LONG_MAX
+#endif
+
+#include <config.h>
+
+#include "xstrtol.h"
+
+/* Some pre-ANSI implementations (e.g. SunOS 4)
+   need stderr defined if assertion checking is enabled.  */
+#include <stdio.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "assure.h"
+
+#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
+
+static strtol_error
+bkm_scale (__strtol_t *x, int scale_factor)
+{
+  if (TYPE_SIGNED (__strtol_t) && *x < STRTOL_T_MINIMUM / scale_factor)
+    {
+      *x = STRTOL_T_MINIMUM;
+      return LONGINT_OVERFLOW;
+    }
+  if (STRTOL_T_MAXIMUM / scale_factor < *x)
+    {
+      *x = STRTOL_T_MAXIMUM;
+      return LONGINT_OVERFLOW;
+    }
+  *x *= scale_factor;
+  return LONGINT_OK;
+}
+
+static strtol_error
+bkm_scale_by_power (__strtol_t *x, int base, int power)
+{
+  strtol_error err = LONGINT_OK;
+  while (power--)
+    err |= bkm_scale (x, base);
+  return err;
+}
+
+/* FIXME: comment.  */
+
+strtol_error
+__xstrtol (const char *s, char **ptr, int strtol_base,
+           __strtol_t *val, const char *valid_suffixes)
+{
+  char *t_ptr;
+  char **p;
+  __strtol_t tmp;
+  strtol_error err = LONGINT_OK;
+
+  assure (0 <= strtol_base && strtol_base <= 36);
+
+  p = (ptr ? ptr : &t_ptr);
+
+  errno = 0;
+
+  if (! TYPE_SIGNED (__strtol_t))
+    {
+      const char *q = s;
+      unsigned char ch = *q;
+      while (isspace (ch))
+        ch = *++q;
+      if (ch == '-')
+        return LONGINT_INVALID;
+    }
+
+  tmp = __strtol (s, p, strtol_base);
+
+  if (*p == s)
+    {
+      /* If there is no number but there is a valid suffix, assume the
+         number is 1.  The string is invalid otherwise.  */
+      if (valid_suffixes && **p && strchr (valid_suffixes, **p))
+        tmp = 1;
+      else
+        return LONGINT_INVALID;
+    }
+  else if (errno != 0)
+    {
+      if (errno != ERANGE)
+        return LONGINT_INVALID;
+      err = LONGINT_OVERFLOW;
+    }
+
+  /* Let valid_suffixes == NULL mean "allow any suffix".  */
+  /* FIXME: update all callers except the ones that allow suffixes
+     after the number, changing last parameter NULL to "".  */
+  if (!valid_suffixes)
+    {
+      *val = tmp;
+      return err;
+    }
+
+  if (**p != '\0')
+    {
+      int base = 1024;
+      int suffixes = 1;
+      strtol_error overflow;
+
+      if (!strchr (valid_suffixes, **p))
+        {
+          *val = tmp;
+          return err | LONGINT_INVALID_SUFFIX_CHAR;
+        }
+
+      switch (**p)
+        {
+        case 'E': case 'G': case 'g': case 'k': case 'K': case 'M': case 'm':
+        case 'P': case 'T': case 't': case 'Y': case 'Z':
+
+          /* The "valid suffix" '0' is a special flag meaning that
+             an optional second suffix is allowed, which can change
+             the base.  A suffix "B" (e.g. "100MB") stands for a power
+             of 1000, whereas a suffix "iB" (e.g. "100MiB") stands for
+             a power of 1024.  If no suffix (e.g. "100M"), assume
+             power-of-1024.  */
+
+          if (strchr (valid_suffixes, '0'))
+            switch (p[0][1])
+              {
+              case 'i':
+                if (p[0][2] == 'B')
+                  suffixes += 2;
+                break;
+
+              case 'B':
+              case 'D': /* 'D' is obsolescent */
+                base = 1000;
+                suffixes++;
+                break;
+              }
+        }
+
+      switch (**p)
+        {
+        case 'b':
+          overflow = bkm_scale (&tmp, 512);
+          break;
+
+        case 'B':
+          /* This obsolescent first suffix is distinct from the 'B'
+             second suffix above.  E.g., 'tar -L 1000B' means change
+             the tape after writing 1000 KiB of data.  */
+          overflow = bkm_scale (&tmp, 1024);
+          break;
+
+        case 'c':
+          overflow = LONGINT_OK;
+          break;
+
+        case 'E': /* exa or exbi */
+          overflow = bkm_scale_by_power (&tmp, base, 6);
+          break;
+
+        case 'G': /* giga or gibi */
+        case 'g': /* 'g' is undocumented; for compatibility only */
+          overflow = bkm_scale_by_power (&tmp, base, 3);
+          break;
+
+        case 'k': /* kilo */
+        case 'K': /* kibi */
+          overflow = bkm_scale_by_power (&tmp, base, 1);
+          break;
+
+        case 'M': /* mega or mebi */
+        case 'm': /* 'm' is undocumented; for compatibility only */
+          overflow = bkm_scale_by_power (&tmp, base, 2);
+          break;
+
+        case 'P': /* peta or pebi */
+          overflow = bkm_scale_by_power (&tmp, base, 5);
+          break;
+
+        case 'T': /* tera or tebi */
+        case 't': /* 't' is undocumented; for compatibility only */
+          overflow = bkm_scale_by_power (&tmp, base, 4);
+          break;
+
+        case 'w':
+          overflow = bkm_scale (&tmp, 2);
+          break;
+
+        case 'Y': /* yotta or 2**80 */
+          overflow = bkm_scale_by_power (&tmp, base, 8);
+          break;
+
+        case 'Z': /* zetta or 2**70 */
+          overflow = bkm_scale_by_power (&tmp, base, 7);
+          break;
+
+        default:
+          *val = tmp;
+          return err | LONGINT_INVALID_SUFFIX_CHAR;
+        }
+
+      err |= overflow;
+      *p += suffixes;
+      if (**p)
+        err |= LONGINT_INVALID_SUFFIX_CHAR;
+    }
+
+  *val = tmp;
+  return err;
+}
diff --git a/src/grep/lib/xstrtol.h b/src/grep/lib/xstrtol.h
new file mode 100644
index 0000000..b873033
--- /dev/null
+++ b/src/grep/lib/xstrtol.h
@@ -0,0 +1,50 @@
+/* A more useful interface to strtol.
+
+   Copyright (C) 1995-1996, 1998-1999, 2001-2004, 2006-2021 Free Software
+   Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef XSTRTOL_H_
+# define XSTRTOL_H_ 1
+
+# include <inttypes.h>
+
+# ifndef _STRTOL_ERROR
+enum strtol_error
+  {
+    LONGINT_OK = 0,
+
+    /* These two values can be ORed together, to indicate that both
+       errors occurred.  */
+    LONGINT_OVERFLOW = 1,
+    LONGINT_INVALID_SUFFIX_CHAR = 2,
+
+    LONGINT_INVALID_SUFFIX_CHAR_WITH_OVERFLOW = (LONGINT_INVALID_SUFFIX_CHAR
+                                                 | LONGINT_OVERFLOW),
+    LONGINT_INVALID = 4
+  };
+typedef enum strtol_error strtol_error;
+# endif
+
+# define _DECLARE_XSTRTOL(name, type) \
+  strtol_error name (const char *, char **, int, type *, const char *);
+_DECLARE_XSTRTOL (xstrtol, long int)
+_DECLARE_XSTRTOL (xstrtoul, unsigned long int)
+_DECLARE_XSTRTOL (xstrtoll, long long int)
+_DECLARE_XSTRTOL (xstrtoull, unsigned long long int)
+_DECLARE_XSTRTOL (xstrtoimax, intmax_t)
+_DECLARE_XSTRTOL (xstrtoumax, uintmax_t)
+
+#endif /* not XSTRTOL_H_ */
diff --git a/src/grep/lib/xstrtoul.c b/src/grep/lib/xstrtoul.c
new file mode 100644
index 0000000..c705a4c
--- /dev/null
+++ b/src/grep/lib/xstrtoul.c
@@ -0,0 +1,23 @@
+/* Convert string to 'unsigned long', with error checking.
+
+   Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3 of the License,
+   or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#define __strtol strtoul
+#define __strtol_t unsigned long int
+#define __xstrtol xstrtoul
+#define STRTOL_T_MINIMUM 0
+#define STRTOL_T_MAXIMUM ULONG_MAX
+#include "xstrtol.c"
diff --git a/src/grep/m4/00gnulib.m4 b/src/grep/m4/00gnulib.m4
new file mode 100644
index 0000000..9ba1743
--- /dev/null
+++ b/src/grep/m4/00gnulib.m4
@@ -0,0 +1,85 @@
+# 00gnulib.m4 serial 8
+dnl Copyright (C) 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl This file must be named something that sorts before all other
+dnl gnulib-provided .m4 files.  It is needed until the clang fix has
+dnl been included in Autoconf.
+
+# The following definitions arrange to use a compiler option
+# -Werror=implicit-function-declaration in AC_CHECK_DECL, when the
+# compiler is clang.  Without it, clang implicitly declares "known"
+# library functions in C mode, but not in C++ mode, which would cause
+# Gnulib to omit a declaration and thus later produce an error in C++
+# mode.  As of clang 9.0, these "known" functions are identified through
+# LIBBUILTIN invocations in the LLVM source file
+# llvm/tools/clang/include/clang/Basic/Builtins.def.
+# It's not possible to AC_REQUIRE the extra tests from AC_CHECK_DECL,
+# because AC_CHECK_DECL, like other Autoconf built-ins, is not supposed
+# to AC_REQUIRE anything: some configure.ac files have their first
+# AC_CHECK_DECL executed conditionally.  Therefore append the extra tests
+# to AC_PROG_CC.
+AC_DEFUN([gl_COMPILER_CLANG],
+[
+dnl AC_REQUIRE([AC_PROG_CC])
+  AC_CACHE_CHECK([whether the compiler is clang],
+    [gl_cv_compiler_clang],
+    [dnl Use _AC_COMPILE_IFELSE instead of AC_EGREP_CPP, to avoid error
+     dnl "circular dependency of AC_LANG_COMPILER(C)" if AC_PROG_CC has
+     dnl not yet been invoked.
+     _AC_COMPILE_IFELSE(
+        [AC_LANG_PROGRAM([[
+           #ifdef __clang__
+           barfbarf
+           #endif
+           ]],[[]])
+        ],
+        [gl_cv_compiler_clang=no],
+        [gl_cv_compiler_clang=yes])
+    ])
+])
+AC_DEFUN([gl_COMPILER_PREPARE_CHECK_DECL],
+[
+dnl AC_REQUIRE([AC_PROG_CC])
+dnl AC_REQUIRE([gl_COMPILER_CLANG])
+  AC_CACHE_CHECK([for compiler option needed when checking for declarations],
+    [gl_cv_compiler_check_decl_option],
+    [if test $gl_cv_compiler_clang = yes; then
+       dnl Test whether the compiler supports the option
+       dnl '-Werror=implicit-function-declaration'.
+       save_ac_compile="$ac_compile"
+       ac_compile="$ac_compile -Werror=implicit-function-declaration"
+       dnl Use _AC_COMPILE_IFELSE instead of AC_COMPILE_IFELSE, to avoid a
+       dnl warning "AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS".
+       _AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]],[[]])],
+         [gl_cv_compiler_check_decl_option='-Werror=implicit-function-declaration'],
+         [gl_cv_compiler_check_decl_option=none])
+       ac_compile="$save_ac_compile"
+     else
+       gl_cv_compiler_check_decl_option=none
+     fi
+    ])
+  if test "x$gl_cv_compiler_check_decl_option" != xnone; then
+    ac_compile_for_check_decl="$ac_compile $gl_cv_compiler_check_decl_option"
+  else
+    ac_compile_for_check_decl="$ac_compile"
+  fi
+])
+dnl Redefine _AC_CHECK_DECL_BODY so that it references ac_compile_for_check_decl
+dnl instead of ac_compile.  If, for whatever reason, the override of AC_PROG_CC
+dnl in zzgnulib.m4 is inactive, use the original ac_compile.
+m4_define([_AC_CHECK_DECL_BODY],
+[  ac_save_ac_compile="$ac_compile"
+  if test -n "$ac_compile_for_check_decl"; then
+    ac_compile="$ac_compile_for_check_decl"
+  fi]
+m4_defn([_AC_CHECK_DECL_BODY])[  ac_compile="$ac_save_ac_compile"
+])
+
+# gl_00GNULIB
+# -----------
+# Witness macro that this file has been included.  Needed to force
+# Automake to include this file prior to all other gnulib .m4 files.
+AC_DEFUN([gl_00GNULIB])
diff --git a/src/grep/m4/__inline.m4 b/src/grep/m4/__inline.m4
new file mode 100644
index 0000000..b28cc6a
--- /dev/null
+++ b/src/grep/m4/__inline.m4
@@ -0,0 +1,22 @@
+# Test for __inline keyword
+dnl Copyright 2017-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl___INLINE],
+[
+  AC_CACHE_CHECK([whether the compiler supports the __inline keyword],
+    [gl_cv_c___inline],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+         [[typedef int foo_t;
+           static __inline foo_t foo (void) { return 0; }]],
+         [[return foo ();]])],
+       [gl_cv_c___inline=yes],
+       [gl_cv_c___inline=no])])
+  if test $gl_cv_c___inline = yes; then
+    AC_DEFINE([HAVE___INLINE], [1],
+      [Define to 1 if the compiler supports the keyword '__inline'.])
+  fi
+])
diff --git a/src/grep/m4/absolute-header.m4 b/src/grep/m4/absolute-header.m4
new file mode 100644
index 0000000..52d80d0
--- /dev/null
+++ b/src/grep/m4/absolute-header.m4
@@ -0,0 +1,100 @@
+# absolute-header.m4 serial 17
+dnl Copyright (C) 2006-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Derek Price.
+
+# gl_ABSOLUTE_HEADER(HEADER1 HEADER2 ...)
+# ---------------------------------------
+# Find the absolute name of a header file, testing first if the header exists.
+# If the header were sys/inttypes.h, this macro would define
+# ABSOLUTE_SYS_INTTYPES_H to the '""' quoted absolute name of sys/inttypes.h
+# in config.h
+# (e.g. '#define ABSOLUTE_SYS_INTTYPES_H "///usr/include/sys/inttypes.h"').
+# The three "///" are to pacify Sun C 5.8, which otherwise would say
+# "warning: #include of /usr/include/... may be non-portable".
+# Use '""', not '<>', so that the /// cannot be confused with a C99 comment.
+# Note: This macro assumes that the header file is not empty after
+# preprocessing, i.e. it does not only define preprocessor macros but also
+# provides some type/enum definitions or function/variable declarations.
+AC_DEFUN([gl_ABSOLUTE_HEADER],
+[AC_REQUIRE([AC_CANONICAL_HOST])
+AC_LANG_PREPROC_REQUIRE()dnl
+m4_foreach_w([gl_HEADER_NAME], [$1],
+  [AS_VAR_PUSHDEF([gl_absolute_header],
+                  [gl_cv_absolute_]m4_defn([gl_HEADER_NAME]))dnl
+  AC_CACHE_CHECK([absolute name of <]m4_defn([gl_HEADER_NAME])[>],
+    [gl_absolute_header],
+    [AS_VAR_PUSHDEF([ac_header_exists],
+                    [ac_cv_header_]m4_defn([gl_HEADER_NAME]))dnl
+    AC_CHECK_HEADERS_ONCE(m4_defn([gl_HEADER_NAME]))dnl
+    if test AS_VAR_GET([ac_header_exists]) = yes; then
+      gl_ABSOLUTE_HEADER_ONE(m4_defn([gl_HEADER_NAME]))
+    fi
+    AS_VAR_POPDEF([ac_header_exists])dnl
+    ])dnl
+  AC_DEFINE_UNQUOTED(AS_TR_CPP([ABSOLUTE_]m4_defn([gl_HEADER_NAME])),
+                     ["AS_VAR_GET([gl_absolute_header])"],
+                     [Define this to an absolute name of <]m4_defn([gl_HEADER_NAME])[>.])
+  AS_VAR_POPDEF([gl_absolute_header])dnl
+])dnl
+])# gl_ABSOLUTE_HEADER
+
+# gl_ABSOLUTE_HEADER_ONE(HEADER)
+# ------------------------------
+# Like gl_ABSOLUTE_HEADER, except that:
+#   - it assumes that the header exists,
+#   - it uses the current CPPFLAGS,
+#   - it does not cache the result,
+#   - it is silent.
+AC_DEFUN([gl_ABSOLUTE_HEADER_ONE],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_LANG_CONFTEST([AC_LANG_SOURCE([[#include <]]m4_dquote([$1])[[>]])])
+  dnl AIX "xlc -E" and "cc -E" omit #line directives for header files
+  dnl that contain only a #include of other header files and no
+  dnl non-comment tokens of their own. This leads to a failure to
+  dnl detect the absolute name of <dirent.h>, <signal.h>, <poll.h>
+  dnl and others. The workaround is to force preservation of comments
+  dnl through option -C. This ensures all necessary #line directives
+  dnl are present. GCC supports option -C as well.
+  case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+changequote(,)
+  case "$host_os" in
+    mingw*)
+      dnl For the sake of native Windows compilers (excluding gcc),
+      dnl treat backslash as a directory separator, like /.
+      dnl Actually, these compilers use a double-backslash as
+      dnl directory separator, inside the
+      dnl   # line "filename"
+      dnl directives.
+      gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+  dnl A sed expression that turns a string into a basic regular
+  dnl expression, for use within "/.../".
+  gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo '$1' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+changequote([,])
+  dnl eval is necessary to expand gl_absname_cpp.
+  dnl Ultrix and Pyramid sh refuse to redirect output of eval,
+  dnl so use subshell.
+  AS_VAR_SET([gl_cv_absolute_]AS_TR_SH([[$1]]),
+[`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD |
+  sed -n "$gl_absolute_header_sed"`])
+])
diff --git a/src/grep/m4/alloca.m4 b/src/grep/m4/alloca.m4
new file mode 100644
index 0000000..ba2f679
--- /dev/null
+++ b/src/grep/m4/alloca.m4
@@ -0,0 +1,108 @@
+# alloca.m4 serial 20
+dnl Copyright (C) 2002-2004, 2006-2007, 2009-2021 Free Software Foundation,
+dnl Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_ALLOCA],
+[
+  AC_REQUIRE([AC_FUNC_ALLOCA])
+  if test $ac_cv_func_alloca_works = no; then
+    gl_PREREQ_ALLOCA
+  fi
+
+  # Define an additional variable used in the Makefile substitution.
+  if test $ac_cv_working_alloca_h = yes; then
+    AC_CACHE_CHECK([for alloca as a compiler built-in], [gl_cv_rpl_alloca], [
+      AC_EGREP_CPP([Need own alloca], [
+#if defined __GNUC__ || defined _AIX || defined _MSC_VER
+        Need own alloca
+#endif
+        ], [gl_cv_rpl_alloca=yes], [gl_cv_rpl_alloca=no])
+    ])
+    if test $gl_cv_rpl_alloca = yes; then
+      dnl OK, alloca can be implemented through a compiler built-in.
+      AC_DEFINE([HAVE_ALLOCA], [1],
+        [Define to 1 if you have 'alloca' after including <alloca.h>,
+         a header that may be supplied by this distribution.])
+      ALLOCA_H=alloca.h
+    else
+      dnl alloca exists as a library function, i.e. it is slow and probably
+      dnl a memory leak. Don't define HAVE_ALLOCA in this case.
+      ALLOCA_H=
+    fi
+  else
+    ALLOCA_H=alloca.h
+  fi
+  AC_SUBST([ALLOCA_H])
+  AM_CONDITIONAL([GL_GENERATE_ALLOCA_H], [test -n "$ALLOCA_H"])
+
+  if test $ac_cv_working_alloca_h = yes; then
+    HAVE_ALLOCA_H=1
+  else
+    HAVE_ALLOCA_H=0
+  fi
+  AC_SUBST([HAVE_ALLOCA_H])
+])
+
+# Prerequisites of lib/alloca.c.
+# STACK_DIRECTION is already handled by AC_FUNC_ALLOCA.
+AC_DEFUN([gl_PREREQ_ALLOCA], [:])
+
+m4_version_prereq([2.70], [], [
+
+# This works around a bug in autoconf <= 2.68 and has simplifications
+# from 2.70.  See:
+# https://lists.gnu.org/r/bug-gnulib/2011-06/msg00277.html
+# https://git.savannah.gnu.org/cgit/autoconf.git/commit/?id=6cd9f12520b0d6f76d3230d7565feba1ecf29497
+# https://git.savannah.gnu.org/cgit/autoconf.git/commit/?id=15edf7fd8094fd14a89d9891dd72a9624762597a
+
+# _AC_LIBOBJ_ALLOCA
+# -----------------
+# Set up the LIBOBJ replacement of 'alloca'.  Well, not exactly
+# AC_LIBOBJ since we actually set the output variable 'ALLOCA'.
+# Nevertheless, for Automake, AC_LIBSOURCES it.
+m4_define([_AC_LIBOBJ_ALLOCA],
+[# The SVR3 libPW and SVR4 libucb both contain incompatible functions
+# that cause trouble.  Some versions do not even contain alloca or
+# contain a buggy version.  If you still want to use their alloca,
+# use ar to extract alloca.o from them instead of compiling alloca.c.
+AC_LIBSOURCES(alloca.c)
+AC_SUBST([ALLOCA], [\${LIBOBJDIR}alloca.$ac_objext])dnl
+AC_DEFINE(C_ALLOCA, 1, [Define to 1 if using 'alloca.c'.])
+
+AC_CACHE_CHECK([stack direction for C alloca],
+               [ac_cv_c_stack_direction],
+[AC_RUN_IFELSE([AC_LANG_SOURCE(
+[AC_INCLUDES_DEFAULT
+int
+find_stack_direction (int *addr, int depth)
+{
+  int dir, dummy = 0;
+  if (! addr)
+    addr = &dummy;
+  *addr = addr < &dummy ? 1 : addr == &dummy ? 0 : -1;
+  dir = depth ? find_stack_direction (addr, depth - 1) : 0;
+  return dir + dummy;
+}
+
+int
+main (int argc, char **argv)
+{
+  return find_stack_direction (0, argc + !argv + 20) < 0;
+}])],
+               [ac_cv_c_stack_direction=1],
+               [ac_cv_c_stack_direction=-1],
+               [ac_cv_c_stack_direction=0])])
+AH_VERBATIM([STACK_DIRECTION],
+[/* If using the C implementation of alloca, define if you know the
+   direction of stack growth for your system; otherwise it will be
+   automatically deduced at runtime.
+        STACK_DIRECTION > 0 => grows toward higher addresses
+        STACK_DIRECTION < 0 => grows toward lower addresses
+        STACK_DIRECTION = 0 => direction of growth unknown */
+#undef STACK_DIRECTION])dnl
+AC_DEFINE_UNQUOTED(STACK_DIRECTION, $ac_cv_c_stack_direction)
+])# _AC_LIBOBJ_ALLOCA
+])
diff --git a/src/grep/m4/arpa_inet_h.m4 b/src/grep/m4/arpa_inet_h.m4
new file mode 100644
index 0000000..a3ba256
--- /dev/null
+++ b/src/grep/m4/arpa_inet_h.m4
@@ -0,0 +1,74 @@
+# arpa_inet_h.m4 serial 17
+dnl Copyright (C) 2006, 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Written by Simon Josefsson and Bruno Haible
+
+AC_DEFUN_ONCE([gl_ARPA_INET_H],
+[
+  dnl Ensure to expand the default settings once only, before all statements
+  dnl that occur in other macros.
+  AC_REQUIRE([gl_ARPA_INET_H_DEFAULTS])
+
+  AC_CHECK_HEADERS_ONCE([arpa/inet.h])
+  if test $ac_cv_header_arpa_inet_h = yes; then
+    HAVE_ARPA_INET_H=1
+  else
+    HAVE_ARPA_INET_H=0
+  fi
+  AC_SUBST([HAVE_ARPA_INET_H])
+  dnl <arpa/inet.h> is always overridden, because of GNULIB_POSIXCHECK.
+  gl_CHECK_NEXT_HEADERS([arpa/inet.h])
+
+  AC_REQUIRE([gl_FEATURES_H])
+
+  gl_PREREQ_SYS_H_WS2TCPIP
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[
+/* On some systems, this header is not self-consistent.  */
+#if !(defined __GLIBC__ || defined __UCLIBC__)
+# include <sys/socket.h>
+#endif
+#ifdef __TANDEM
+# include <netdb.h>
+#endif
+#include <arpa/inet.h>
+    ]], [inet_ntop inet_pton])
+])
+
+# gl_ARPA_INET_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_ARPA_INET_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_ARPA_INET_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_ARPA_INET_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_ARPA_INET_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_INET_NTOP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_INET_PTON])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_ARPA_INET_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_ARPA_INET_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_ARPA_INET_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_DECL_INET_NTOP=1;  AC_SUBST([HAVE_DECL_INET_NTOP])
+  HAVE_DECL_INET_PTON=1;  AC_SUBST([HAVE_DECL_INET_PTON])
+  REPLACE_INET_NTOP=0;    AC_SUBST([REPLACE_INET_NTOP])
+  REPLACE_INET_PTON=0;    AC_SUBST([REPLACE_INET_PTON])
+])
diff --git a/src/grep/m4/asm-underscore.m4 b/src/grep/m4/asm-underscore.m4
new file mode 100644
index 0000000..93b98be
--- /dev/null
+++ b/src/grep/m4/asm-underscore.m4
@@ -0,0 +1,83 @@
+# asm-underscore.m4 serial 5
+dnl Copyright (C) 2010-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible. Based on as-underscore.m4 in GNU clisp.
+
+# gl_ASM_SYMBOL_PREFIX
+# Tests for the prefix of C symbols at the assembly language level and the
+# linker level. This prefix is either an underscore or empty. Defines the
+# C macro USER_LABEL_PREFIX to this prefix, and sets ASM_SYMBOL_PREFIX to
+# a stringified variant of this prefix.
+
+AC_DEFUN([gl_ASM_SYMBOL_PREFIX],
+[
+  AC_REQUIRE([AC_PROG_EGREP])
+  dnl We don't use GCC's __USER_LABEL_PREFIX__ here, because
+  dnl 1. It works only for GCC.
+  dnl 2. It is incorrectly defined on some platforms, in some GCC versions.
+  AC_REQUIRE([gl_C_ASM])
+  AC_CACHE_CHECK(
+    [whether C symbols are prefixed with underscore at the linker level],
+    [gl_cv_prog_as_underscore],
+    [cat > conftest.c <<EOF
+#ifdef __cplusplus
+extern "C" int foo (void);
+#endif
+int foo(void) { return 0; }
+EOF
+     # Look for the assembly language name in the .s file.
+     AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS $gl_c_asm_opt conftest.c) >/dev/null 2>&1
+     if LC_ALL=C $EGREP '(^|[[^a-zA-Z0-9_]])_foo([[^a-zA-Z0-9_]]|$)' conftest.$gl_asmext >/dev/null; then
+       gl_cv_prog_as_underscore=yes
+     else
+       gl_cv_prog_as_underscore=no
+     fi
+     rm -f conftest*
+    ])
+  if test $gl_cv_prog_as_underscore = yes; then
+    USER_LABEL_PREFIX=_
+  else
+    USER_LABEL_PREFIX=
+  fi
+  AC_DEFINE_UNQUOTED([USER_LABEL_PREFIX], [$USER_LABEL_PREFIX],
+    [Define to the prefix of C symbols at the assembler and linker level,
+     either an underscore or empty.])
+  ASM_SYMBOL_PREFIX='"'${USER_LABEL_PREFIX}'"'
+  AC_SUBST([ASM_SYMBOL_PREFIX])
+])
+
+# gl_C_ASM
+# Determines how to produce an assembly language file from C source code.
+# Sets the variables:
+#   gl_asmext - the extension of assembly language output,
+#   gl_c_asm_opt - the C compiler option that produces assembly language output.
+
+AC_DEFUN([gl_C_ASM],
+[
+  AC_EGREP_CPP([MicrosoftCompiler],
+    [
+#ifdef _MSC_VER
+MicrosoftCompiler
+#endif
+    ],
+    [dnl Microsoft's 'cl' and 'clang-cl' produce an .asm file, whereas 'clang'
+     dnl produces a .s file. Need to distinguish 'clang' and 'clang-cl'.
+     rm -f conftest*
+     echo 'int dummy;' > conftest.c
+     AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c) >/dev/null 2>&1
+     if test -f conftest.o; then
+       gl_asmext='s'
+       gl_c_asm_opt='-S'
+     else
+       gl_asmext='asm'
+       gl_c_asm_opt='-c -Fa'
+     fi
+     rm -f conftest*
+    ],
+    [gl_asmext='s'
+     gl_c_asm_opt='-S'
+    ])
+])
diff --git a/src/grep/m4/assert.m4 b/src/grep/m4/assert.m4
new file mode 100644
index 0000000..b5e56d7
--- /dev/null
+++ b/src/grep/m4/assert.m4
@@ -0,0 +1,24 @@
+#serial 7
+
+# Copyright (C) 1998-1999, 2001, 2004, 2008-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+dnl based on code from Eleftherios Gkioulekas
+dnl Autoconf 2.60 provides AC_HEADER_ASSERT for the same purpose, but
+dnl it has broken semantics for --enable-assert until 2.64.
+AC_DEFUN([gl_ASSERT],
+[
+  AC_MSG_CHECKING([whether to enable assertions])
+  AC_ARG_ENABLE([assert],
+    [AS_HELP_STRING([--disable-assert], [turn off assertions])],
+    [AS_IF([test "x$enableval" = xno],
+      [AC_DEFINE([NDEBUG], [1],
+        [Define to 1 if assertions should be disabled.])],
+      [test "x$enableval" != xyes],
+      [AC_MSG_WARN([invalid argument supplied to --enable-assert])
+      enable_assert=yes])],
+    [enable_assert=yes])
+  AC_MSG_RESULT([$enable_assert])
+])
diff --git a/src/grep/m4/btowc.m4 b/src/grep/m4/btowc.m4
new file mode 100644
index 0000000..d2b2fe8
--- /dev/null
+++ b/src/grep/m4/btowc.m4
@@ -0,0 +1,105 @@
+# btowc.m4 serial 12
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_BTOWC],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+
+  dnl Check whether <wchar.h> is usable at all, first. Otherwise the test
+  dnl program below may lead to an endless loop. See
+  dnl <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42440>.
+  AC_REQUIRE([gl_WCHAR_H_INLINE_OK])
+
+  AC_CHECK_FUNCS_ONCE([btowc])
+  if test $ac_cv_func_btowc = no; then
+    HAVE_BTOWC=0
+  else
+
+    AC_REQUIRE([AC_PROG_CC])
+    AC_REQUIRE([gt_LOCALE_FR])
+    AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+    dnl Cygwin 1.7.2 btowc('\0') is WEOF, not 0.
+    AC_CACHE_CHECK([whether btowc(0) is correct],
+      [gl_cv_func_btowc_nul],
+      [
+        AC_RUN_IFELSE(
+          [AC_LANG_SOURCE([[
+#include <wchar.h>
+int main ()
+{
+  if (btowc ('\0') != 0)
+    return 1;
+  return 0;
+}]])],
+          [gl_cv_func_btowc_nul=yes],
+          [gl_cv_func_btowc_nul=no],
+          [
+changequote(,)dnl
+           case "$host_os" in
+                      # Guess no on Cygwin.
+             cygwin*) gl_cv_func_btowc_nul="guessing no" ;;
+                      # Guess yes on native Windows.
+             mingw*)  gl_cv_func_btowc_nul="guessing yes" ;;
+                      # Guess yes otherwise.
+             *)       gl_cv_func_btowc_nul="guessing yes" ;;
+           esac
+changequote([,])dnl
+          ])
+      ])
+
+    dnl IRIX 6.5 btowc(EOF) is 0xFF, not WEOF.
+    AC_CACHE_CHECK([whether btowc(EOF) is correct],
+      [gl_cv_func_btowc_eof],
+      [
+        dnl Initial guess, used when cross-compiling or when no suitable locale
+        dnl is present.
+changequote(,)dnl
+        case "$host_os" in
+                  # Guess no on IRIX.
+          irix*)  gl_cv_func_btowc_eof="guessing no" ;;
+                  # Guess yes on native Windows.
+          mingw*) gl_cv_func_btowc_eof="guessing yes" ;;
+                  # Guess yes otherwise.
+          *)      gl_cv_func_btowc_eof="guessing yes" ;;
+        esac
+changequote([,])dnl
+        if test $LOCALE_FR != none; then
+          AC_RUN_IFELSE(
+            [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <stdio.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
+    {
+      if (btowc (EOF) != WEOF)
+        return 1;
+    }
+  return 0;
+}]])],
+            [gl_cv_func_btowc_eof=yes],
+            [gl_cv_func_btowc_eof=no],
+            [:])
+        fi
+      ])
+
+    case "$gl_cv_func_btowc_nul" in
+      *yes) ;;
+      *) REPLACE_BTOWC=1 ;;
+    esac
+    case "$gl_cv_func_btowc_eof" in
+      *yes) ;;
+      *) REPLACE_BTOWC=1 ;;
+    esac
+  fi
+])
+
+# Prerequisites of lib/btowc.c.
+AC_DEFUN([gl_PREREQ_BTOWC], [
+  :
+])
diff --git a/src/grep/m4/builtin-expect.m4 b/src/grep/m4/builtin-expect.m4
new file mode 100644
index 0000000..c584116
--- /dev/null
+++ b/src/grep/m4/builtin-expect.m4
@@ -0,0 +1,49 @@
+dnl Check for __builtin_expect.
+
+dnl Copyright 2016-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Written by Paul Eggert.
+
+AC_DEFUN([gl___BUILTIN_EXPECT],
+[
+  AC_CACHE_CHECK([for __builtin_expect],
+    [gl_cv___builtin_expect],
+    [AC_LINK_IFELSE(
+       [AC_LANG_SOURCE([[
+         int
+         main (int argc, char **argv)
+         {
+           argc = __builtin_expect (argc, 100);
+           return argv[argc != 100][0];
+         }]])],
+       [gl_cv___builtin_expect=yes],
+       [AC_LINK_IFELSE(
+          [AC_LANG_SOURCE([[
+             #include <builtins.h>
+             int
+             main (int argc, char **argv)
+             {
+               argc = __builtin_expect (argc, 100);
+               return argv[argc != 100][0];
+             }]])],
+          [gl_cv___builtin_expect="in <builtins.h>"],
+          [gl_cv___builtin_expect=no])])])
+  if test "$gl_cv___builtin_expect" = yes; then
+    AC_DEFINE([HAVE___BUILTIN_EXPECT], [1])
+  elif test "$gl_cv___builtin_expect" = "in <builtins.h>"; then
+    AC_DEFINE([HAVE___BUILTIN_EXPECT], [2])
+  fi
+  AH_VERBATIM([HAVE___BUILTIN_EXPECT],
+    [/* Define to 1 if the compiler supports __builtin_expect,
+   and to 2 if <builtins.h> does.  */
+#undef HAVE___BUILTIN_EXPECT
+#ifndef HAVE___BUILTIN_EXPECT
+# define __builtin_expect(e, c) (e)
+#elif HAVE___BUILTIN_EXPECT == 2
+# include <builtins.h>
+#endif
+    ])
+])
diff --git a/src/grep/m4/c-stack.m4 b/src/grep/m4/c-stack.m4
new file mode 100644
index 0000000..7cccb06
--- /dev/null
+++ b/src/grep/m4/c-stack.m4
@@ -0,0 +1,21 @@
+# Check prerequisites for compiling lib/c-stack.c.
+
+# Copyright (C) 2002-2004, 2008-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# Written by Paul Eggert.
+
+# serial 23
+
+AC_DEFUN([gl_C_STACK],
+[
+  dnl 'c-stack' needs -lsigsegv if and only if the 'sigsegv' module needs it.
+  if test "$with_libsigsegv" = yes; then
+    if test "$gl_cv_lib_sigsegv" = yes; then
+      AC_SUBST([LIBCSTACK], [$LIBSIGSEGV])
+      AC_SUBST([LTLIBCSTACK], [$LTLIBSIGSEGV])
+    fi
+  fi
+])
diff --git a/src/grep/m4/calloc.m4 b/src/grep/m4/calloc.m4
new file mode 100644
index 0000000..fe12b15
--- /dev/null
+++ b/src/grep/m4/calloc.m4
@@ -0,0 +1,82 @@
+# calloc.m4 serial 27
+
+# Copyright (C) 2004-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# Written by Jim Meyering.
+
+# Determine whether calloc (N, S) returns non-NULL when N*S is zero,
+# and returns NULL when N*S overflows.
+# If so, define HAVE_CALLOC.  Otherwise, define calloc to rpl_calloc
+# and arrange to use a calloc wrapper function that does work in that case.
+
+# _AC_FUNC_CALLOC_IF([IF-WORKS], [IF-NOT])
+# -------------------------------------
+# If calloc is compatible with GNU calloc, run IF-WORKS, otherwise, IF-NOT.
+AC_DEFUN([_AC_FUNC_CALLOC_IF],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether calloc (0, n) and calloc (n, 0) return nonnull],
+    [ac_cv_func_calloc_0_nonnull],
+    [if test $cross_compiling != yes; then
+       ac_cv_func_calloc_0_nonnull=yes
+       AC_RUN_IFELSE(
+         [AC_LANG_PROGRAM(
+            [AC_INCLUDES_DEFAULT],
+            [[int result = 0;
+              char * volatile p = calloc (0, 0);
+              if (!p)
+                result |= 1;
+              free (p);
+              return result;
+            ]])],
+         [],
+         [ac_cv_func_calloc_0_nonnull=no])
+     else
+       case "$host_os" in
+                        # Guess yes on glibc systems.
+         *-gnu* | gnu*) ac_cv_func_calloc_0_nonnull="guessing yes" ;;
+                        # Guess yes on musl systems.
+         *-musl*)       ac_cv_func_calloc_0_nonnull="guessing yes" ;;
+                        # Guess yes on native Windows.
+         mingw*)        ac_cv_func_calloc_0_nonnull="guessing yes" ;;
+                        # If we don't know, obey --enable-cross-guesses.
+         *)             ac_cv_func_calloc_0_nonnull="$gl_cross_guess_normal" ;;
+       esac
+     fi
+    ])
+  AS_CASE([$ac_cv_func_calloc_0_nonnull], [*yes], [$1], [$2])
+])
+
+
+# gl_FUNC_CALLOC_GNU
+# ------------------
+# Replace calloc if it is not compatible with GNU libc.
+AC_DEFUN([gl_FUNC_CALLOC_GNU],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_CALLOC_POSIX])
+  if test $REPLACE_CALLOC = 0; then
+    _AC_FUNC_CALLOC_IF([], [REPLACE_CALLOC=1])
+  fi
+])# gl_FUNC_CALLOC_GNU
+
+# gl_FUNC_CALLOC_POSIX
+# --------------------
+# Test whether 'calloc' is POSIX compliant (sets errno to ENOMEM when it
+# fails, and doesn't mess up with ptrdiff_t or size_t overflow),
+# and replace calloc if it is not.
+AC_DEFUN([gl_FUNC_CALLOC_POSIX],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_MALLOC_POSIX])
+  if test $REPLACE_MALLOC = 1; then
+    REPLACE_CALLOC=1
+  fi
+  dnl Although in theory we should also test for size_t overflow,
+  dnl in practice testing for ptrdiff_t overflow suffices
+  dnl since PTRDIFF_MAX <= SIZE_MAX on all known Gnulib porting targets.
+  dnl A separate size_t test would slow down 'configure'.
+])
diff --git a/src/grep/m4/chdir-long.m4 b/src/grep/m4/chdir-long.m4
new file mode 100644
index 0000000..e5cd8df
--- /dev/null
+++ b/src/grep/m4/chdir-long.m4
@@ -0,0 +1,30 @@
+#serial 17
+
+# Use Gnulib's robust chdir function.
+# It can handle arbitrarily long directory names, which means
+# that when it is given the name of an existing directory, it
+# never fails with ENAMETOOLONG.
+# Arrange to compile chdir-long.c only on systems that define PATH_MAX.
+
+dnl Copyright (C) 2004-2007, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# Written by Jim Meyering.
+
+AC_DEFUN([gl_FUNC_CHDIR_LONG],
+[
+  AC_REQUIRE([gl_PATHMAX_SNIPPET_PREREQ])
+  AC_CACHE_CHECK([whether this system supports file names of any length],
+    [gl_cv_have_unlimited_file_name_length],
+    [AC_EGREP_CPP([have_arbitrary_file_name_length_limit],
+                  gl_PATHMAX_SNIPPET[
+#ifdef PATH_MAX
+have_arbitrary_file_name_length_limit
+#endif],
+    [gl_cv_have_unlimited_file_name_length=no],
+    [gl_cv_have_unlimited_file_name_length=yes])])
+])
+
+AC_DEFUN([gl_PREREQ_CHDIR_LONG], [:])
diff --git a/src/grep/m4/close.m4 b/src/grep/m4/close.m4
new file mode 100644
index 0000000..77a5047
--- /dev/null
+++ b/src/grep/m4/close.m4
@@ -0,0 +1,35 @@
+# close.m4 serial 9
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_CLOSE],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  m4_ifdef([gl_MSVC_INVAL], [
+    AC_REQUIRE([gl_MSVC_INVAL])
+    if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+      REPLACE_CLOSE=1
+    fi
+  ])
+  m4_ifdef([gl_PREREQ_SYS_H_WINSOCK2], [
+    gl_PREREQ_SYS_H_WINSOCK2
+    if test $UNISTD_H_HAVE_WINSOCK2_H = 1; then
+      dnl Even if the 'socket' module is not used here, another part of the
+      dnl application may use it and pass file descriptors that refer to
+      dnl sockets to the close() function. So enable the support for sockets.
+      REPLACE_CLOSE=1
+    fi
+  ])
+  dnl Replace close() for supporting the gnulib-defined fchdir() function,
+  dnl to keep fchdir's bookkeeping up-to-date.
+  m4_ifdef([gl_FUNC_FCHDIR], [
+    if test $REPLACE_CLOSE = 0; then
+      gl_TEST_FCHDIR
+      if test $HAVE_FCHDIR = 0; then
+        REPLACE_CLOSE=1
+      fi
+    fi
+  ])
+])
diff --git a/src/grep/m4/closedir.m4 b/src/grep/m4/closedir.m4
new file mode 100644
index 0000000..fc55a21
--- /dev/null
+++ b/src/grep/m4/closedir.m4
@@ -0,0 +1,31 @@
+# closedir.m4 serial 6
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_CLOSEDIR],
+[
+  AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+  AC_CHECK_FUNCS([closedir])
+  if test $ac_cv_func_closedir = no; then
+    HAVE_CLOSEDIR=0
+  fi
+  dnl Replace closedir() for supporting the gnulib-defined fchdir() function,
+  dnl to keep fchdir's bookkeeping up-to-date.
+  m4_ifdef([gl_FUNC_FCHDIR], [
+    gl_TEST_FCHDIR
+    if test $HAVE_FCHDIR = 0; then
+      if test $HAVE_CLOSEDIR = 1; then
+        REPLACE_CLOSEDIR=1
+      fi
+    fi
+  ])
+  dnl Replace closedir() for supporting the gnulib-defined dirfd() function.
+  case $host_os,$HAVE_CLOSEDIR in
+    os2*,1)
+      REPLACE_CLOSEDIR=1;;
+  esac
+])
diff --git a/src/grep/m4/codeset.m4 b/src/grep/m4/codeset.m4
new file mode 100644
index 0000000..629f4ee
--- /dev/null
+++ b/src/grep/m4/codeset.m4
@@ -0,0 +1,24 @@
+# codeset.m4 serial 5 (gettext-0.18.2)
+dnl Copyright (C) 2000-2002, 2006, 2008-2014, 2016, 2019-2021 Free Software
+dnl Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+
+AC_DEFUN([AM_LANGINFO_CODESET],
+[
+  AC_CACHE_CHECK([for nl_langinfo and CODESET], [am_cv_langinfo_codeset],
+    [AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <langinfo.h>]],
+          [[char* cs = nl_langinfo(CODESET); return !cs;]])],
+       [am_cv_langinfo_codeset=yes],
+       [am_cv_langinfo_codeset=no])
+    ])
+  if test $am_cv_langinfo_codeset = yes; then
+    AC_DEFINE([HAVE_LANGINFO_CODESET], [1],
+      [Define if you have <langinfo.h> and nl_langinfo(CODESET).])
+  fi
+])
diff --git a/src/grep/m4/configmake.m4 b/src/grep/m4/configmake.m4
new file mode 100644
index 0000000..d4f20ee
--- /dev/null
+++ b/src/grep/m4/configmake.m4
@@ -0,0 +1,27 @@
+# configmake.m4 serial 4
+dnl Copyright (C) 2010-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_PREREQ([2.60])
+
+# gl_CONFIGMAKE_PREP
+# ------------------
+# Guarantee all of the standard directory variables, even when used with
+# autoconf 2.64 (runstatedir wasn't supported before 2.70) or
+# automake 1.11 (runstatedir isn't supported even in 1.16.1).
+AC_DEFUN([gl_CONFIGMAKE_PREP],
+[
+  if test "x$lispdir" = x; then
+    AC_SUBST([lispdir], ['${datarootdir}/emacs/site-lisp'])
+  fi
+  dnl Added in autoconf 2.70.
+  if test "x$runstatedir" = x; then
+    AC_SUBST([runstatedir], ['${localstatedir}/run'])
+  fi
+
+  dnl Automake 1.11 provides pkglibexecdir merely without AC_SUBST.
+  dnl This blind use of AC_SUBST is safe.
+  AC_SUBST([pkglibexecdir], ['${libexecdir}/${PACKAGE}'])
+])
diff --git a/src/grep/m4/ctype_h.m4 b/src/grep/m4/ctype_h.m4
new file mode 100644
index 0000000..efdae45
--- /dev/null
+++ b/src/grep/m4/ctype_h.m4
@@ -0,0 +1,47 @@
+# ctype_h.m4 serial 9
+dnl Copyright (C) 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN_ONCE([gl_CTYPE_H],
+[
+  AC_REQUIRE([gl_CTYPE_H_DEFAULTS])
+
+  dnl <ctype.h> is always overridden, because of GNULIB_POSIXCHECK.
+  gl_NEXT_HEADERS([ctype.h])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[#include <ctype.h>
+    ]], [isblank])
+])
+
+# gl_CTYPE_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_CTYPE_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_CTYPE_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_CTYPE_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_CTYPE_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISBLANK])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_CTYPE_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_CTYPE_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_CTYPE_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_ISBLANK=1;   AC_SUBST([HAVE_ISBLANK])
+])
diff --git a/src/grep/m4/cycle-check.m4 b/src/grep/m4/cycle-check.m4
new file mode 100644
index 0000000..5293230
--- /dev/null
+++ b/src/grep/m4/cycle-check.m4
@@ -0,0 +1,7 @@
+#serial 7
+dnl Copyright (C) 2005-2007, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_CYCLE_CHECK], [:])
diff --git a/src/grep/m4/d-ino.m4 b/src/grep/m4/d-ino.m4
new file mode 100644
index 0000000..e4dcfeb
--- /dev/null
+++ b/src/grep/m4/d-ino.m4
@@ -0,0 +1,60 @@
+# serial 20
+
+dnl From Jim Meyering.
+dnl
+dnl Check whether struct dirent has a member named d_ino.
+dnl
+
+# Copyright (C) 1997, 1999-2001, 2003-2004, 2006-2007, 2009-2021 Free Software
+# Foundation, Inc.
+
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_CHECK_TYPE_STRUCT_DIRENT_D_INO],
+  [AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+   AC_CACHE_CHECK([for d_ino member in directory struct],
+                  [gl_cv_struct_dirent_d_ino],
+     [AC_RUN_IFELSE(
+        [AC_LANG_PROGRAM(
+           [[#include <sys/types.h>
+             #include <sys/stat.h>
+             #include <dirent.h>
+           ]],
+           [[DIR *dp = opendir (".");
+             struct dirent *e;
+             struct stat st;
+             if (! dp)
+               return 1;
+             e = readdir (dp);
+             if (! e)
+               { closedir (dp); return 2; }
+             if (lstat (e->d_name, &st) != 0)
+               { closedir (dp); return 3; }
+             if (e->d_ino != st.st_ino)
+               { closedir (dp); return 4; }
+             closedir (dp);
+             return 0;
+           ]])],
+           [gl_cv_struct_dirent_d_ino=yes],
+           [gl_cv_struct_dirent_d_ino=no],
+           [case "$host_os" in
+                            # Guess yes on glibc systems with Linux kernel.
+              linux*-gnu*)  gl_cv_struct_dirent_d_ino="guessing yes" ;;
+                            # Guess yes on musl systems with Linux kernel.
+              linux*-musl*) gl_cv_struct_dirent_d_ino="guessing yes" ;;
+                            # Guess no on native Windows.
+              mingw*)       gl_cv_struct_dirent_d_ino="guessing no" ;;
+                            # If we don't know, obey --enable-cross-guesses.
+              *)            gl_cv_struct_dirent_d_ino="$gl_cross_guess_normal" ;;
+            esac
+           ])])
+   case "$gl_cv_struct_dirent_d_ino" in
+     *yes)
+       AC_DEFINE([D_INO_IN_DIRENT], [1],
+         [Define if struct dirent has a member d_ino that actually works.])
+       ;;
+   esac
+  ]
+)
diff --git a/src/grep/m4/d-type.m4 b/src/grep/m4/d-type.m4
new file mode 100644
index 0000000..534a59e
--- /dev/null
+++ b/src/grep/m4/d-type.m4
@@ -0,0 +1,32 @@
+# serial 12
+
+dnl From Jim Meyering.
+dnl
+dnl Check whether struct dirent has a member named d_type.
+dnl
+
+# Copyright (C) 1997, 1999-2004, 2006, 2009-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_CHECK_TYPE_STRUCT_DIRENT_D_TYPE],
+  [AC_CACHE_CHECK([for d_type member in directory struct],
+                  [gl_cv_struct_dirent_d_type],
+     [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <dirent.h>
+         ]],
+         [[struct dirent dp; dp.d_type = 0;]])],
+       [gl_cv_struct_dirent_d_type=yes],
+       [gl_cv_struct_dirent_d_type=no])
+     ]
+   )
+   if test $gl_cv_struct_dirent_d_type = yes; then
+     AC_DEFINE([HAVE_STRUCT_DIRENT_D_TYPE], [1],
+       [Define if there is a member named d_type in the struct describing
+        directory headers.])
+   fi
+  ]
+)
diff --git a/src/grep/m4/dirent_h.m4 b/src/grep/m4/dirent_h.m4
new file mode 100644
index 0000000..17e2a20
--- /dev/null
+++ b/src/grep/m4/dirent_h.m4
@@ -0,0 +1,79 @@
+# dirent_h.m4 serial 19
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Written by Bruno Haible.
+
+AC_DEFUN_ONCE([gl_DIRENT_H],
+[
+  dnl Ensure to expand the default settings once only, before all statements
+  dnl that occur in other macros.
+  AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
+
+  dnl <dirent.h> is always overridden, because of GNULIB_POSIXCHECK.
+  gl_CHECK_NEXT_HEADERS([dirent.h])
+  if test $ac_cv_header_dirent_h = yes; then
+    HAVE_DIRENT_H=1
+  else
+    HAVE_DIRENT_H=0
+  fi
+  AC_SUBST([HAVE_DIRENT_H])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[#include <dirent.h>
+    ]], [alphasort closedir dirfd fdopendir opendir readdir rewinddir scandir])
+])
+
+# gl_DIRENT_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_DIRENT_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_DIRENT_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_DIRENT_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_DIRENT_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_UNISTD_H_REQUIRE_DEFAULTS dnl for REPLACE_FCHDIR
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_OPENDIR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_READDIR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_REWINDDIR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_CLOSEDIR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_DIRFD])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FDOPENDIR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SCANDIR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ALPHASORT])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_DIRENT_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_DIRENT_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_OPENDIR=1;       AC_SUBST([HAVE_OPENDIR])
+  HAVE_READDIR=1;       AC_SUBST([HAVE_READDIR])
+  HAVE_REWINDDIR=1;     AC_SUBST([HAVE_REWINDDIR])
+  HAVE_CLOSEDIR=1;      AC_SUBST([HAVE_CLOSEDIR])
+  HAVE_DECL_DIRFD=1;    AC_SUBST([HAVE_DECL_DIRFD])
+  HAVE_DECL_FDOPENDIR=1;AC_SUBST([HAVE_DECL_FDOPENDIR])
+  HAVE_FDOPENDIR=1;     AC_SUBST([HAVE_FDOPENDIR])
+  HAVE_SCANDIR=1;       AC_SUBST([HAVE_SCANDIR])
+  HAVE_ALPHASORT=1;     AC_SUBST([HAVE_ALPHASORT])
+  REPLACE_OPENDIR=0;    AC_SUBST([REPLACE_OPENDIR])
+  REPLACE_CLOSEDIR=0;   AC_SUBST([REPLACE_CLOSEDIR])
+  REPLACE_DIRFD=0;      AC_SUBST([REPLACE_DIRFD])
+  REPLACE_FDOPENDIR=0;  AC_SUBST([REPLACE_FDOPENDIR])
+])
diff --git a/src/grep/m4/dirfd.m4 b/src/grep/m4/dirfd.m4
new file mode 100644
index 0000000..3c9ce5d
--- /dev/null
+++ b/src/grep/m4/dirfd.m4
@@ -0,0 +1,86 @@
+# serial 26   -*- Autoconf -*-
+
+dnl Find out how to get the file descriptor associated with an open DIR*.
+
+# Copyright (C) 2001-2006, 2008-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+dnl From Jim Meyering
+
+AC_DEFUN([gl_FUNC_DIRFD],
+[
+  AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+  dnl Persuade glibc <dirent.h> to declare dirfd().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_CHECK_FUNCS([dirfd])
+  AC_CHECK_DECLS([dirfd], , ,
+    [[#include <sys/types.h>
+      #include <dirent.h>]])
+  if test $ac_cv_have_decl_dirfd = no; then
+    HAVE_DECL_DIRFD=0
+  fi
+
+  AC_CACHE_CHECK([whether dirfd is a macro],
+    [gl_cv_func_dirfd_macro],
+    [AC_EGREP_CPP([dirent_header_defines_dirfd], [
+#include <sys/types.h>
+#include <dirent.h>
+#ifdef dirfd
+ dirent_header_defines_dirfd
+#endif],
+       [gl_cv_func_dirfd_macro=yes],
+       [gl_cv_func_dirfd_macro=no])])
+
+  # Use the replacement if we have no function or macro with that name,
+  # or if OS/2 kLIBC whose dirfd() does not work.
+  # Replace only if the system declares dirfd already.
+  case $ac_cv_func_dirfd,$gl_cv_func_dirfd_macro,$host_os,$ac_cv_have_decl_dirfd in
+    no,no,*,yes | *,*,os2*,yes)
+      REPLACE_DIRFD=1
+      AC_DEFINE([REPLACE_DIRFD], [1],
+        [Define to 1 if gnulib's dirfd() replacement is used.]);;
+  esac
+])
+
+dnl Prerequisites of lib/dirfd.c.
+AC_DEFUN([gl_PREREQ_DIRFD],
+[
+  AC_CACHE_CHECK([how to get the file descriptor associated with an open DIR*],
+                 [gl_cv_sys_dir_fd_member_name],
+    [
+      dirfd_save_CFLAGS=$CFLAGS
+      for ac_expr in d_fd dd_fd; do
+
+        CFLAGS="$CFLAGS -DDIR_FD_MEMBER_NAME=$ac_expr"
+        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+           #include <sys/types.h>
+           #include <dirent.h>]],
+          [[DIR *dir_p = opendir("."); (void) dir_p->DIR_FD_MEMBER_NAME;]])],
+          [dir_fd_found=yes]
+        )
+        CFLAGS=$dirfd_save_CFLAGS
+        test "$dir_fd_found" = yes && break
+      done
+      test "$dir_fd_found" = yes || ac_expr=no_such_member
+
+      gl_cv_sys_dir_fd_member_name=$ac_expr
+    ]
+  )
+  if test $gl_cv_sys_dir_fd_member_name != no_such_member; then
+    AC_DEFINE_UNQUOTED([DIR_FD_MEMBER_NAME],
+      [$gl_cv_sys_dir_fd_member_name],
+      [the name of the file descriptor member of DIR])
+  fi
+  AH_VERBATIM([DIR_TO_FD],
+              [#ifdef DIR_FD_MEMBER_NAME
+# define DIR_TO_FD(Dir_p) ((Dir_p)->DIR_FD_MEMBER_NAME)
+#else
+# define DIR_TO_FD(Dir_p) -1
+#endif
+])
+])
diff --git a/src/grep/m4/double-slash-root.m4 b/src/grep/m4/double-slash-root.m4
new file mode 100644
index 0000000..c9bbcef
--- /dev/null
+++ b/src/grep/m4/double-slash-root.m4
@@ -0,0 +1,38 @@
+# double-slash-root.m4 serial 4   -*- Autoconf -*-
+dnl Copyright (C) 2006, 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_DOUBLE_SLASH_ROOT],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CACHE_CHECK([whether // is distinct from /], [gl_cv_double_slash_root],
+    [ if test x"$cross_compiling" = xyes ; then
+        # When cross-compiling, there is no way to tell whether // is special
+        # short of a list of hosts.  However, the only known hosts to date
+        # that have a distinct // are Apollo DomainOS (too old to port to),
+        # Cygwin, and z/OS.  If anyone knows of another system for which // has
+        # special semantics and is distinct from /, please report it to
+        # <bug-gnulib@gnu.org>.
+        case $host in
+          *-cygwin | i370-ibm-openedition)
+            gl_cv_double_slash_root=yes ;;
+          *)
+            # Be optimistic and assume that / and // are the same when we
+            # don't know.
+            gl_cv_double_slash_root='unknown, assuming no' ;;
+        esac
+      else
+        set x `ls -di / // 2>/dev/null`
+        if test "$[2]" = "$[4]" && wc //dev/null >/dev/null 2>&1; then
+          gl_cv_double_slash_root=no
+        else
+          gl_cv_double_slash_root=yes
+        fi
+      fi])
+  if test "$gl_cv_double_slash_root" = yes; then
+    AC_DEFINE([DOUBLE_SLASH_IS_DISTINCT_ROOT], [1],
+      [Define to 1 if // is a file system root distinct from /.])
+  fi
+])
diff --git a/src/grep/m4/dup.m4 b/src/grep/m4/dup.m4
new file mode 100644
index 0000000..433a466
--- /dev/null
+++ b/src/grep/m4/dup.m4
@@ -0,0 +1,54 @@
+# dup.m4 serial 7
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_DUP],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  m4_ifdef([gl_MSVC_INVAL], [
+    AC_REQUIRE([gl_MSVC_INVAL])
+    if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+      REPLACE_DUP=1
+    fi
+  ])
+  dnl Replace dup() for supporting the gnulib-defined fchdir() function,
+  dnl to keep fchdir's bookkeeping up-to-date.
+  m4_ifdef([gl_FUNC_FCHDIR], [
+    gl_TEST_FCHDIR
+    if test $HAVE_FCHDIR = 0; then
+      REPLACE_DUP=1
+    fi
+  ])
+  AC_CACHE_CHECK([whether dup works], [gl_cv_func_dup_works],
+    [AC_RUN_IFELSE(
+      [AC_LANG_PROGRAM([[#include <unistd.h>
+                         #include <fcntl.h>
+                         #include <errno.h>
+                       ]GL_MDA_DEFINES],
+         [[/* On OS/2 kLIBC, dup does not work on a directory fd.  */
+           int fd = open (".", O_RDONLY);
+           return fd < 0 ? 1 : dup (fd) < 0 ? 2 : 0;
+         ]])
+      ],
+      [gl_cv_func_dup_works=yes],
+      [gl_cv_func_dup_works=no],
+      [case "$host_os" in
+                 # Guess no on native Windows.
+         mingw*) gl_cv_func_dup_works="guessing no" ;;
+         *)      gl_cv_func_dup_works="guessing yes" ;;
+       esac
+      ])
+    ])
+  case "$gl_cv_func_dup_works" in
+    *yes) ;;
+    *)
+      REPLACE_DUP=1
+      ;;
+  esac
+])
+
+# Prerequisites of lib/dup.c.
+AC_DEFUN([gl_PREREQ_DUP], [:])
diff --git a/src/grep/m4/dup2.m4 b/src/grep/m4/dup2.m4
new file mode 100644
index 0000000..0753a32
--- /dev/null
+++ b/src/grep/m4/dup2.m4
@@ -0,0 +1,105 @@
+#serial 27
+dnl Copyright (C) 2002, 2005, 2007, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_DUP2],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CACHE_CHECK([whether dup2 works], [gl_cv_func_dup2_works],
+    [AC_RUN_IFELSE([
+       AC_LANG_PROGRAM(
+         [[#include <errno.h>
+           #include <fcntl.h>
+           #include <limits.h>
+           #include <sys/resource.h>
+           #include <unistd.h>
+           ]GL_MDA_DEFINES[
+           #ifndef RLIM_SAVED_CUR
+           # define RLIM_SAVED_CUR RLIM_INFINITY
+           #endif
+           #ifndef RLIM_SAVED_MAX
+           # define RLIM_SAVED_MAX RLIM_INFINITY
+           #endif
+         ]],
+         [[int result = 0;
+           int bad_fd = INT_MAX;
+           struct rlimit rlim;
+           if (getrlimit (RLIMIT_NOFILE, &rlim) == 0
+               && 0 <= rlim.rlim_cur && rlim.rlim_cur <= INT_MAX
+               && rlim.rlim_cur != RLIM_INFINITY
+               && rlim.rlim_cur != RLIM_SAVED_MAX
+               && rlim.rlim_cur != RLIM_SAVED_CUR)
+             bad_fd = rlim.rlim_cur;
+           #ifdef FD_CLOEXEC
+             if (fcntl (1, F_SETFD, FD_CLOEXEC) == -1)
+               result |= 1;
+           #endif
+           if (dup2 (1, 1) != 1)
+             result |= 2;
+           #ifdef FD_CLOEXEC
+             if (fcntl (1, F_GETFD) != FD_CLOEXEC)
+               result |= 4;
+           #endif
+           close (0);
+           if (dup2 (0, 0) != -1)
+             result |= 8;
+           /* Many gnulib modules require POSIX conformance of EBADF.  */
+           if (dup2 (2, bad_fd) == -1 && errno != EBADF)
+             result |= 16;
+           /* Flush out some cygwin core dumps.  */
+           if (dup2 (2, -1) != -1 || errno != EBADF)
+             result |= 32;
+           dup2 (2, 255);
+           dup2 (2, 256);
+           /* On OS/2 kLIBC, dup2() does not work on a directory fd.  */
+           {
+             int fd = open (".", O_RDONLY);
+             if (fd == -1)
+               result |= 64;
+             else if (dup2 (fd, fd + 1) == -1)
+               result |= 128;
+             close (fd);
+           }
+           return result;]])
+      ],
+      [gl_cv_func_dup2_works=yes], [gl_cv_func_dup2_works=no],
+      [case "$host_os" in
+         mingw*) # on this platform, dup2 always returns 0 for success
+           gl_cv_func_dup2_works="guessing no" ;;
+         cygwin*) # on cygwin 1.5.x, dup2(1,1) returns 0
+           gl_cv_func_dup2_works="guessing no" ;;
+         aix* | freebsd*)
+                 # on AIX 7.1 and FreeBSD 6.1, dup2 (1,toobig) gives EMFILE,
+                 # not EBADF.
+           gl_cv_func_dup2_works="guessing no" ;;
+         haiku*) # on Haiku alpha 2, dup2(1, 1) resets FD_CLOEXEC.
+           gl_cv_func_dup2_works="guessing no" ;;
+         *-android*) # implemented using dup3(), which fails if oldfd == newfd
+           gl_cv_func_dup2_works="guessing no" ;;
+         os2*) # on OS/2 kLIBC, dup2() does not work on a directory fd.
+           gl_cv_func_dup2_works="guessing no" ;;
+         *) gl_cv_func_dup2_works="guessing yes" ;;
+       esac])
+    ])
+  case "$gl_cv_func_dup2_works" in
+    *yes) ;;
+    *)
+      REPLACE_DUP2=1
+      AC_CHECK_FUNCS([setdtablesize])
+      ;;
+  esac
+  dnl Replace dup2() for supporting the gnulib-defined fchdir() function,
+  dnl to keep fchdir's bookkeeping up-to-date.
+  m4_ifdef([gl_FUNC_FCHDIR], [
+    gl_TEST_FCHDIR
+    if test $HAVE_FCHDIR = 0; then
+      REPLACE_DUP2=1
+    fi
+  ])
+])
+
+# Prerequisites of lib/dup2.c.
+AC_DEFUN([gl_PREREQ_DUP2], [])
diff --git a/src/grep/m4/eealloc.m4 b/src/grep/m4/eealloc.m4
new file mode 100644
index 0000000..002f0c8
--- /dev/null
+++ b/src/grep/m4/eealloc.m4
@@ -0,0 +1,31 @@
+# eealloc.m4 serial 3
+dnl Copyright (C) 2003, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_EEALLOC],
+[
+  AC_REQUIRE([gl_EEMALLOC])
+  AC_REQUIRE([gl_EEREALLOC])
+])
+
+AC_DEFUN([gl_EEMALLOC],
+[
+  _AC_FUNC_MALLOC_IF(
+    [gl_cv_func_malloc_0_nonnull=1],
+    [gl_cv_func_malloc_0_nonnull=0])
+  AC_DEFINE_UNQUOTED([MALLOC_0_IS_NONNULL], [$gl_cv_func_malloc_0_nonnull],
+    [If malloc(0) is != NULL, define this to 1.  Otherwise define this
+     to 0.])
+])
+
+AC_DEFUN([gl_EEREALLOC],
+[
+  _AC_FUNC_REALLOC_IF(
+    [gl_cv_func_realloc_0_nonnull=1],
+    [gl_cv_func_realloc_0_nonnull=0])
+  AC_DEFINE_UNQUOTED([REALLOC_0_IS_NONNULL], [$gl_cv_func_realloc_0_nonnull],
+    [If realloc(NULL,0) is != NULL, define this to 1.  Otherwise define this
+     to 0.])
+])
diff --git a/src/grep/m4/environ.m4 b/src/grep/m4/environ.m4
new file mode 100644
index 0000000..ae53291
--- /dev/null
+++ b/src/grep/m4/environ.m4
@@ -0,0 +1,46 @@
+# environ.m4 serial 8
+dnl Copyright (C) 2001-2004, 2006-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN_ONCE([gl_ENVIRON],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  dnl Persuade glibc <unistd.h> to declare environ.
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+  AC_CHECK_HEADERS_ONCE([unistd.h])
+  gt_CHECK_VAR_DECL(
+    [#if HAVE_UNISTD_H
+     #include <unistd.h>
+     #endif
+     /* mingw, BeOS, Haiku declare environ in <stdlib.h>, not in <unistd.h>.  */
+     #include <stdlib.h>
+    ],
+    [environ])
+  if test $gt_cv_var_environ_declaration != yes; then
+    HAVE_DECL_ENVIRON=0
+  fi
+])
+
+# Check if a variable is properly declared.
+# gt_CHECK_VAR_DECL(includes,variable)
+AC_DEFUN([gt_CHECK_VAR_DECL],
+[
+  define([gt_cv_var], [gt_cv_var_]$2[_declaration])
+  AC_CACHE_CHECK([if $2 is properly declared], [gt_cv_var],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[$1
+            typedef struct { int foo; } foo_t;
+            extern foo_t $2;]],
+          [[$2.foo = 1;]])],
+       [gt_cv_var=no],
+       [gt_cv_var=yes])])
+  if test $gt_cv_var = yes; then
+    AC_DEFINE([HAVE_]m4_translit($2, [a-z], [A-Z])[_DECL], 1,
+              [Define if you have the declaration of $2.])
+  fi
+  undefine([gt_cv_var])
+])
diff --git a/src/grep/m4/errno_h.m4 b/src/grep/m4/errno_h.m4
new file mode 100644
index 0000000..51dfe92
--- /dev/null
+++ b/src/grep/m4/errno_h.m4
@@ -0,0 +1,133 @@
+# errno_h.m4 serial 13
+dnl Copyright (C) 2004, 2006, 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_PREREQ([2.61])
+
+AC_DEFUN_ONCE([gl_HEADER_ERRNO_H],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_CACHE_CHECK([for complete errno.h], [gl_cv_header_errno_h_complete], [
+    AC_EGREP_CPP([booboo],[
+#include <errno.h>
+#if !defined ETXTBSY
+booboo
+#endif
+#if !defined ENOMSG
+booboo
+#endif
+#if !defined EIDRM
+booboo
+#endif
+#if !defined ENOLINK
+booboo
+#endif
+#if !defined EPROTO
+booboo
+#endif
+#if !defined EMULTIHOP
+booboo
+#endif
+#if !defined EBADMSG
+booboo
+#endif
+#if !defined EOVERFLOW
+booboo
+#endif
+#if !defined ENOTSUP
+booboo
+#endif
+#if !defined ENETRESET
+booboo
+#endif
+#if !defined ECONNABORTED
+booboo
+#endif
+#if !defined ESTALE
+booboo
+#endif
+#if !defined EDQUOT
+booboo
+#endif
+#if !defined ECANCELED
+booboo
+#endif
+#if !defined EOWNERDEAD
+booboo
+#endif
+#if !defined ENOTRECOVERABLE
+booboo
+#endif
+#if !defined EILSEQ
+booboo
+#endif
+      ],
+      [gl_cv_header_errno_h_complete=no],
+      [gl_cv_header_errno_h_complete=yes])
+  ])
+  if test $gl_cv_header_errno_h_complete = yes; then
+    ERRNO_H=''
+  else
+    gl_NEXT_HEADERS([errno.h])
+    ERRNO_H='errno.h'
+  fi
+  AC_SUBST([ERRNO_H])
+  AM_CONDITIONAL([GL_GENERATE_ERRNO_H], [test -n "$ERRNO_H"])
+  gl_REPLACE_ERRNO_VALUE([EMULTIHOP])
+  gl_REPLACE_ERRNO_VALUE([ENOLINK])
+  gl_REPLACE_ERRNO_VALUE([EOVERFLOW])
+])
+
+# Assuming $1 = EOVERFLOW.
+# The EOVERFLOW errno value ought to be defined in <errno.h>, according to
+# POSIX.  But some systems (like OpenBSD 4.0 or AIX 3) don't define it, and
+# some systems (like OSF/1) define it when _XOPEN_SOURCE_EXTENDED is defined.
+# Check for the value of EOVERFLOW.
+# Set the variables EOVERFLOW_HIDDEN and EOVERFLOW_VALUE.
+AC_DEFUN([gl_REPLACE_ERRNO_VALUE],
+[
+  if test -n "$ERRNO_H"; then
+    AC_CACHE_CHECK([for ]$1[ value], [gl_cv_header_errno_h_]$1, [
+      AC_EGREP_CPP([yes],[
+#include <errno.h>
+#ifdef ]$1[
+yes
+#endif
+      ],
+      [gl_cv_header_errno_h_]$1[=yes],
+      [gl_cv_header_errno_h_]$1[=no])
+      if test $gl_cv_header_errno_h_]$1[ = no; then
+        AC_EGREP_CPP([yes],[
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+#ifdef ]$1[
+yes
+#endif
+          ], [gl_cv_header_errno_h_]$1[=hidden])
+        if test $gl_cv_header_errno_h_]$1[ = hidden; then
+          dnl The macro exists but is hidden.
+          dnl Define it to the same value.
+          AC_COMPUTE_INT([gl_cv_header_errno_h_]$1, $1, [
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+/* The following two lines are a workaround against an autoconf-2.52 bug.  */
+#include <stdio.h>
+#include <stdlib.h>
+])
+        fi
+      fi
+    ])
+    case $gl_cv_header_errno_h_]$1[ in
+      yes | no)
+        ]$1[_HIDDEN=0; ]$1[_VALUE=
+        ;;
+      *)
+        ]$1[_HIDDEN=1; ]$1[_VALUE="$gl_cv_header_errno_h_]$1["
+        ;;
+    esac
+    AC_SUBST($1[_HIDDEN])
+    AC_SUBST($1[_VALUE])
+  fi
+])
diff --git a/src/grep/m4/error.m4 b/src/grep/m4/error.m4
new file mode 100644
index 0000000..77f67f7
--- /dev/null
+++ b/src/grep/m4/error.m4
@@ -0,0 +1,27 @@
+#serial 14
+
+# Copyright (C) 1996-1998, 2001-2004, 2009-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_ERROR],
+[
+  dnl We don't use AC_FUNC_ERROR_AT_LINE any more, because it is no longer
+  dnl maintained in Autoconf and because it invokes AC_LIBOBJ.
+  AC_CACHE_CHECK([for error_at_line], [ac_cv_lib_error_at_line],
+    [AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <error.h>]],
+          [[error_at_line (0, 0, "", 0, "an error occurred");]])],
+       [ac_cv_lib_error_at_line=yes],
+       [ac_cv_lib_error_at_line=no])])
+])
+
+# Prerequisites of lib/error.c.
+AC_DEFUN([gl_PREREQ_ERROR],
+[
+  AC_REQUIRE([AC_FUNC_STRERROR_R])
+  :
+])
diff --git a/src/grep/m4/exponentd.m4 b/src/grep/m4/exponentd.m4
new file mode 100644
index 0000000..fb136f4
--- /dev/null
+++ b/src/grep/m4/exponentd.m4
@@ -0,0 +1,116 @@
+# exponentd.m4 serial 3
+dnl Copyright (C) 2007-2008, 2010-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+AC_DEFUN([gl_DOUBLE_EXPONENT_LOCATION],
+[
+  AC_CACHE_CHECK([where to find the exponent in a 'double'],
+    [gl_cv_cc_double_expbit0],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <float.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#define NWORDS \
+  ((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
+typedef union { double value; unsigned int word[NWORDS]; } memory_double;
+static unsigned int ored_words[NWORDS];
+static unsigned int anded_words[NWORDS];
+static void add_to_ored_words (double x)
+{
+  memory_double m;
+  size_t i;
+  /* Clear it first, in case sizeof (double) < sizeof (memory_double).  */
+  memset (&m, 0, sizeof (memory_double));
+  m.value = x;
+  for (i = 0; i < NWORDS; i++)
+    {
+      ored_words[i] |= m.word[i];
+      anded_words[i] &= m.word[i];
+    }
+}
+int main ()
+{
+  size_t j;
+  FILE *fp = fopen ("conftest.out", "w");
+  if (fp == NULL)
+    return 1;
+  for (j = 0; j < NWORDS; j++)
+    anded_words[j] = ~ (unsigned int) 0;
+  add_to_ored_words (0.25);
+  add_to_ored_words (0.5);
+  add_to_ored_words (1.0);
+  add_to_ored_words (2.0);
+  add_to_ored_words (4.0);
+  /* Remove bits that are common (e.g. if representation of the first mantissa
+     bit is explicit).  */
+  for (j = 0; j < NWORDS; j++)
+    ored_words[j] &= ~anded_words[j];
+  /* Now find the nonzero word.  */
+  for (j = 0; j < NWORDS; j++)
+    if (ored_words[j] != 0)
+      break;
+  if (j < NWORDS)
+    {
+      size_t i;
+      for (i = j + 1; i < NWORDS; i++)
+        if (ored_words[i] != 0)
+          {
+            fprintf (fp, "unknown");
+            return (fclose (fp) != 0);
+          }
+      for (i = 0; ; i++)
+        if ((ored_words[j] >> i) & 1)
+          {
+            fprintf (fp, "word %d bit %d", (int) j, (int) i);
+            return (fclose (fp) != 0);
+          }
+    }
+  fprintf (fp, "unknown");
+  return (fclose (fp) != 0);
+}
+        ]])],
+        [gl_cv_cc_double_expbit0=`cat conftest.out`],
+        [gl_cv_cc_double_expbit0="unknown"],
+        [
+          dnl On ARM, there are two 'double' floating-point formats, used by
+          dnl different sets of instructions: The older FPA instructions assume
+          dnl that they are stored in big-endian word order, while the words
+          dnl (like integer types) are stored in little-endian byte order.
+          dnl The newer VFP instructions assume little-endian order
+          dnl consistently.
+          AC_EGREP_CPP([mixed_endianness], [
+#if defined arm || defined __arm || defined __arm__
+  mixed_endianness
+#endif
+            ],
+            [gl_cv_cc_double_expbit0="unknown"],
+            [
+              pushdef([AC_MSG_CHECKING],[:])dnl
+              pushdef([AC_MSG_RESULT],[:])dnl
+              pushdef([AC_MSG_RESULT_UNQUOTED],[:])dnl
+              AC_C_BIGENDIAN(
+                [gl_cv_cc_double_expbit0="word 0 bit 20"],
+                [gl_cv_cc_double_expbit0="word 1 bit 20"],
+                [gl_cv_cc_double_expbit0="unknown"])
+              popdef([AC_MSG_RESULT_UNQUOTED])dnl
+              popdef([AC_MSG_RESULT])dnl
+              popdef([AC_MSG_CHECKING])dnl
+            ])
+        ])
+      rm -f conftest.out
+    ])
+  case "$gl_cv_cc_double_expbit0" in
+    word*bit*)
+      word=`echo "$gl_cv_cc_double_expbit0" | sed -e 's/word //' -e 's/ bit.*//'`
+      bit=`echo "$gl_cv_cc_double_expbit0" | sed -e 's/word.*bit //'`
+      AC_DEFINE_UNQUOTED([DBL_EXPBIT0_WORD], [$word],
+        [Define as the word index where to find the exponent of 'double'.])
+      AC_DEFINE_UNQUOTED([DBL_EXPBIT0_BIT], [$bit],
+        [Define as the bit index in the word where to find bit 0 of the exponent of 'double'.])
+      ;;
+  esac
+])
diff --git a/src/grep/m4/extensions.m4 b/src/grep/m4/extensions.m4
new file mode 100644
index 0000000..5792a95
--- /dev/null
+++ b/src/grep/m4/extensions.m4
@@ -0,0 +1,227 @@
+# serial 22  -*- Autoconf -*-
+# Enable extensions on systems that normally disable them.
+
+# Copyright (C) 2003, 2006-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+dnl Define to empty for the benefit of Autoconf 2.69 and earlier, so that
+dnl AC_USE_SYSTEM_EXTENSIONS (below) can be used unchanged from Autoconf 2.70+.
+m4_ifndef([AC_CHECK_INCLUDES_DEFAULT],
+  [AC_DEFUN([AC_CHECK_INCLUDES_DEFAULT], [])])
+
+# This definition of AC_USE_SYSTEM_EXTENSIONS is stolen from git
+# Autoconf.  Perhaps we can remove this once we can assume Autoconf
+# is recent-enough everywhere, but since Autoconf mutates rapidly
+# enough in this area it's likely we'll need to redefine
+# AC_USE_SYSTEM_EXTENSIONS for quite some time.
+
+# If autoconf reports a warning
+#     warning: AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS
+# or  warning: AC_RUN_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS
+# the fix is
+#   1) to ensure that AC_USE_SYSTEM_EXTENSIONS is never directly invoked
+#      but always AC_REQUIREd,
+#   2) to ensure that for each occurrence of
+#        AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+#      or
+#        AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+#      the corresponding gnulib module description has 'extensions' among
+#      its dependencies. This will ensure that the gl_USE_SYSTEM_EXTENSIONS
+#      invocation occurs in gl_EARLY, not in gl_INIT.
+
+m4_version_prereq([2.70.1], [], [
+
+# AC_USE_SYSTEM_EXTENSIONS
+# ------------------------
+# Enable extensions on systems that normally disable them,
+# typically due to standards-conformance issues.
+# We unconditionally define as many of the known feature-enabling
+# as possible, reserving conditional behavior for macros that are
+# known to cause problems on some platforms (such as __EXTENSIONS__).
+AC_DEFUN_ONCE([AC_USE_SYSTEM_EXTENSIONS],
+[AC_BEFORE([$0], [AC_PREPROC_IFELSE])dnl
+AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl
+AC_BEFORE([$0], [AC_LINK_IFELSE])dnl
+AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
+AC_BEFORE([$0], [AC_CHECK_INCLUDES_DEFAULT])dnl
+dnl #undef in AH_VERBATIM gets replaced with #define by AC_DEFINE.
+dnl Use a different key than __EXTENSIONS__, as that name broke existing
+dnl configure.ac when using autoheader 2.62.
+dnl The macros below are in alphabetical order ignoring leading _ or __
+dnl prefixes.
+AH_VERBATIM([USE_SYSTEM_EXTENSIONS],
+[/* Enable extensions on AIX 3, Interix.  */
+#ifndef _ALL_SOURCE
+# undef _ALL_SOURCE
+#endif
+/* Enable general extensions on macOS.  */
+#ifndef _DARWIN_C_SOURCE
+# undef _DARWIN_C_SOURCE
+#endif
+/* Enable general extensions on Solaris.  */
+#ifndef __EXTENSIONS__
+# undef __EXTENSIONS__
+#endif
+/* Enable GNU extensions on systems that have them.  */
+#ifndef _GNU_SOURCE
+# undef _GNU_SOURCE
+#endif
+/* Enable X/Open compliant socket functions that do not require linking
+   with -lxnet on HP-UX 11.11.  */
+#ifndef _HPUX_ALT_XOPEN_SOCKET_API
+# undef _HPUX_ALT_XOPEN_SOCKET_API
+#endif
+/* Identify the host operating system as Minix.
+   This macro does not affect the system headers' behavior.
+   A future release of Autoconf may stop defining this macro.  */
+#ifndef _MINIX
+# undef _MINIX
+#endif
+/* Enable general extensions on NetBSD.
+   Enable NetBSD compatibility extensions on Minix.  */
+#ifndef _NETBSD_SOURCE
+# undef _NETBSD_SOURCE
+#endif
+/* Enable OpenBSD compatibility extensions on NetBSD.
+   Oddly enough, this does nothing on OpenBSD.  */
+#ifndef _OPENBSD_SOURCE
+# undef _OPENBSD_SOURCE
+#endif
+/* Define to 1 if needed for POSIX-compatible behavior.  */
+#ifndef _POSIX_SOURCE
+# undef _POSIX_SOURCE
+#endif
+/* Define to 2 if needed for POSIX-compatible behavior.  */
+#ifndef _POSIX_1_SOURCE
+# undef _POSIX_1_SOURCE
+#endif
+/* Enable POSIX-compatible threading on Solaris.  */
+#ifndef _POSIX_PTHREAD_SEMANTICS
+# undef _POSIX_PTHREAD_SEMANTICS
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-5:2014.  */
+#ifndef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+# undef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-1:2014.  */
+#ifndef __STDC_WANT_IEC_60559_BFP_EXT__
+# undef __STDC_WANT_IEC_60559_BFP_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-2:2015.  */
+#ifndef __STDC_WANT_IEC_60559_DFP_EXT__
+# undef __STDC_WANT_IEC_60559_DFP_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-4:2015.  */
+#ifndef __STDC_WANT_IEC_60559_FUNCS_EXT__
+# undef __STDC_WANT_IEC_60559_FUNCS_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-3:2015.  */
+#ifndef __STDC_WANT_IEC_60559_TYPES_EXT__
+# undef __STDC_WANT_IEC_60559_TYPES_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TR 24731-2:2010.  */
+#ifndef __STDC_WANT_LIB_EXT2__
+# undef __STDC_WANT_LIB_EXT2__
+#endif
+/* Enable extensions specified by ISO/IEC 24747:2009.  */
+#ifndef __STDC_WANT_MATH_SPEC_FUNCS__
+# undef __STDC_WANT_MATH_SPEC_FUNCS__
+#endif
+/* Enable extensions on HP NonStop.  */
+#ifndef _TANDEM_SOURCE
+# undef _TANDEM_SOURCE
+#endif
+/* Enable X/Open extensions.  Define to 500 only if necessary
+   to make mbstate_t available.  */
+#ifndef _XOPEN_SOURCE
+# undef _XOPEN_SOURCE
+#endif
+])dnl
+
+  AC_REQUIRE([AC_CHECK_INCLUDES_DEFAULT])dnl
+  _AC_CHECK_HEADER_ONCE([wchar.h])
+  _AC_CHECK_HEADER_ONCE([minix/config.h])
+
+dnl Defining __EXTENSIONS__ may break the system headers on some systems.
+dnl (FIXME: Which ones?)
+  AC_CACHE_CHECK([whether it is safe to define __EXTENSIONS__],
+    [ac_cv_safe_to_define___extensions__],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM([[
+#         define __EXTENSIONS__ 1
+          ]AC_INCLUDES_DEFAULT])],
+       [ac_cv_safe_to_define___extensions__=yes],
+       [ac_cv_safe_to_define___extensions__=no])])
+
+dnl HP-UX 11.11 defines mbstate_t only if _XOPEN_SOURCE is defined to
+dnl 500, regardless of whether compiling with -Ae or -D_HPUX_SOURCE=1.
+dnl But defining _XOPEN_SOURCE may turn *off* extensions on platforms
+dnl not covered by turn-on-extensions macros (notably Dragonfly, Free,
+dnl and OpenBSD, which don't have any equivalent of _NETBSD_SOURCE) so
+dnl it should only be defined when necessary.
+  AC_CACHE_CHECK([whether _XOPEN_SOURCE should be defined],
+    [ac_cv_should_define__xopen_source],
+    [ac_cv_should_define__xopen_source=no
+    AS_IF([test $ac_cv_header_wchar_h = yes],
+      [AC_COMPILE_IFELSE(
+        [AC_LANG_PROGRAM([[
+          #include <wchar.h>
+          mbstate_t x;]])],
+        [],
+        [AC_COMPILE_IFELSE(
+          [AC_LANG_PROGRAM([[
+            #define _XOPEN_SOURCE 500
+            #include <wchar.h>
+            mbstate_t x;]])],
+          [ac_cv_should_define__xopen_source=yes])])])])
+
+  AC_DEFINE([_ALL_SOURCE])
+  AC_DEFINE([_DARWIN_C_SOURCE])
+  AC_DEFINE([_GNU_SOURCE])
+  AC_DEFINE([_HPUX_ALT_XOPEN_SOCKET_API])
+  AC_DEFINE([_NETBSD_SOURCE])
+  AC_DEFINE([_OPENBSD_SOURCE])
+  AC_DEFINE([_POSIX_PTHREAD_SEMANTICS])
+  AC_DEFINE([__STDC_WANT_IEC_60559_ATTRIBS_EXT__])
+  AC_DEFINE([__STDC_WANT_IEC_60559_BFP_EXT__])
+  AC_DEFINE([__STDC_WANT_IEC_60559_DFP_EXT__])
+  AC_DEFINE([__STDC_WANT_IEC_60559_FUNCS_EXT__])
+  AC_DEFINE([__STDC_WANT_IEC_60559_TYPES_EXT__])
+  AC_DEFINE([__STDC_WANT_LIB_EXT2__])
+  AC_DEFINE([__STDC_WANT_MATH_SPEC_FUNCS__])
+  AC_DEFINE([_TANDEM_SOURCE])
+  AS_IF([test $ac_cv_header_minix_config_h = yes],
+    [MINIX=yes
+    AC_DEFINE([_MINIX])
+    AC_DEFINE([_POSIX_SOURCE])
+    AC_DEFINE([_POSIX_1_SOURCE], [2])],
+    [MINIX=])
+  AS_IF([test $ac_cv_safe_to_define___extensions__ = yes],
+    [AC_DEFINE([__EXTENSIONS__])])
+  AS_IF([test $ac_cv_should_define__xopen_source = yes],
+    [AC_DEFINE([_XOPEN_SOURCE], [500])])
+])# AC_USE_SYSTEM_EXTENSIONS
+])
+
+# gl_USE_SYSTEM_EXTENSIONS
+# ------------------------
+# Enable extensions on systems that normally disable them,
+# typically due to standards-conformance issues.
+AC_DEFUN_ONCE([gl_USE_SYSTEM_EXTENSIONS],
+[
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  dnl On OpenBSD 6.8 with GCC, the include files contain a couple of
+  dnl definitions that are only activated with an explicit -D_ISOC11_SOURCE.
+  dnl That's because this version of GCC (4.2.1) supports the option
+  dnl '-std=gnu99' but not the option '-std=gnu11'.
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  case "$host_os" in
+    openbsd*)
+      AC_DEFINE([_ISOC11_SOURCE], [1],
+        [Define to enable the declarations of ISO C 11 types and functions.])
+      ;;
+  esac
+])
diff --git a/src/grep/m4/extern-inline.m4 b/src/grep/m4/extern-inline.m4
new file mode 100644
index 0000000..a2acf12
--- /dev/null
+++ b/src/grep/m4/extern-inline.m4
@@ -0,0 +1,114 @@
+dnl 'extern inline' a la ISO C99.
+
+dnl Copyright 2012-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_EXTERN_INLINE],
+[
+  AH_VERBATIM([extern_inline],
+[/* Please see the Gnulib manual for how to use these macros.
+
+   Suppress extern inline with HP-UX cc, as it appears to be broken; see
+   <https://lists.gnu.org/r/bug-texinfo/2013-02/msg00030.html>.
+
+   Suppress extern inline with Sun C in standards-conformance mode, as it
+   mishandles inline functions that call each other.  E.g., for 'inline void f
+   (void) { } inline void g (void) { f (); }', c99 incorrectly complains
+   'reference to static identifier "f" in extern inline function'.
+   This bug was observed with Sun C 5.12 SunOS_i386 2011/11/16.
+
+   Suppress extern inline (with or without __attribute__ ((__gnu_inline__)))
+   on configurations that mistakenly use 'static inline' to implement
+   functions or macros in standard C headers like <ctype.h>.  For example,
+   if isdigit is mistakenly implemented via a static inline function,
+   a program containing an extern inline function that calls isdigit
+   may not work since the C standard prohibits extern inline functions
+   from calling static functions (ISO C 99 section 6.7.4.(3).
+   This bug is known to occur on:
+
+     OS X 10.8 and earlier; see:
+     https://lists.gnu.org/r/bug-gnulib/2012-12/msg00023.html
+
+     DragonFly; see
+     http://muscles.dragonflybsd.org/bulk/clang-master-potential/20141111_102002/logs/ah-tty-0.3.12.log
+
+     FreeBSD; see:
+     https://lists.gnu.org/r/bug-gnulib/2014-07/msg00104.html
+
+   OS X 10.9 has a macro __header_inline indicating the bug is fixed for C and
+   for clang but remains for g++; see <https://trac.macports.org/ticket/41033>.
+   Assume DragonFly and FreeBSD will be similar.
+
+   GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
+   inline semantics, unless -fgnu89-inline is used.  It defines a macro
+   __GNUC_STDC_INLINE__ to indicate this situation or a macro
+   __GNUC_GNU_INLINE__ to indicate the opposite situation.
+   GCC 4.2 with -std=c99 or -std=gnu99 implements the GNU C inline
+   semantics but warns, unless -fgnu89-inline is used:
+     warning: C99 inline functions are not supported; using GNU89
+     warning: to disable this warning use -fgnu89-inline or the gnu_inline function attribute
+   It defines a macro __GNUC_GNU_INLINE__ to indicate this situation.
+ */
+#if (((defined __APPLE__ && defined __MACH__) \
+      || defined __DragonFly__ || defined __FreeBSD__) \
+     && (defined __header_inline \
+         ? (defined __cplusplus && defined __GNUC_STDC_INLINE__ \
+            && ! defined __clang__) \
+         : ((! defined _DONT_USE_CTYPE_INLINE_ \
+             && (defined __GNUC__ || defined __cplusplus)) \
+            || (defined _FORTIFY_SOURCE && 0 < _FORTIFY_SOURCE \
+                && defined __GNUC__ && ! defined __cplusplus))))
+# define _GL_EXTERN_INLINE_STDHEADER_BUG
+#endif
+#if ((__GNUC__ \
+      ? defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__ \
+      : (199901L <= __STDC_VERSION__ \
+         && !defined __HP_cc \
+         && !defined __PGI \
+         && !(defined __SUNPRO_C && __STDC__))) \
+     && !defined _GL_EXTERN_INLINE_STDHEADER_BUG)
+# define _GL_INLINE inline
+# define _GL_EXTERN_INLINE extern inline
+# define _GL_EXTERN_INLINE_IN_USE
+#elif (2 < __GNUC__ + (7 <= __GNUC_MINOR__) && !defined __STRICT_ANSI__ \
+       && !defined _GL_EXTERN_INLINE_STDHEADER_BUG)
+# if defined __GNUC_GNU_INLINE__ && __GNUC_GNU_INLINE__
+   /* __gnu_inline__ suppresses a GCC 4.2 diagnostic.  */
+#  define _GL_INLINE extern inline __attribute__ ((__gnu_inline__))
+# else
+#  define _GL_INLINE extern inline
+# endif
+# define _GL_EXTERN_INLINE extern
+# define _GL_EXTERN_INLINE_IN_USE
+#else
+# define _GL_INLINE static _GL_UNUSED
+# define _GL_EXTERN_INLINE static _GL_UNUSED
+#endif
+
+/* In GCC 4.6 (inclusive) to 5.1 (exclusive),
+   suppress bogus "no previous prototype for 'FOO'"
+   and "no previous declaration for 'FOO'" diagnostics,
+   when FOO is an inline function in the header; see
+   <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113> and
+   <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63877>.  */
+#if __GNUC__ == 4 && 6 <= __GNUC_MINOR__
+# if defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__
+#  define _GL_INLINE_HEADER_CONST_PRAGMA
+# else
+#  define _GL_INLINE_HEADER_CONST_PRAGMA \
+     _Pragma ("GCC diagnostic ignored \"-Wsuggest-attribute=const\"")
+# endif
+# define _GL_INLINE_HEADER_BEGIN \
+    _Pragma ("GCC diagnostic push") \
+    _Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"") \
+    _Pragma ("GCC diagnostic ignored \"-Wmissing-declarations\"") \
+    _GL_INLINE_HEADER_CONST_PRAGMA
+# define _GL_INLINE_HEADER_END \
+    _Pragma ("GCC diagnostic pop")
+#else
+# define _GL_INLINE_HEADER_BEGIN
+# define _GL_INLINE_HEADER_END
+#endif])
+])
diff --git a/src/grep/m4/fchdir.m4 b/src/grep/m4/fchdir.m4
new file mode 100644
index 0000000..5d2fab7
--- /dev/null
+++ b/src/grep/m4/fchdir.m4
@@ -0,0 +1,68 @@
+# fchdir.m4 serial 26
+dnl Copyright (C) 2006-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_FCHDIR],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+  AC_CHECK_DECLS_ONCE([fchdir])
+  if test $ac_cv_have_decl_fchdir = no; then
+    HAVE_DECL_FCHDIR=0
+  fi
+
+  AC_REQUIRE([gl_TEST_FCHDIR])
+  if test $HAVE_FCHDIR = 0; then
+    AC_LIBOBJ([fchdir])
+    gl_PREREQ_FCHDIR
+    AC_DEFINE([REPLACE_FCHDIR], [1],
+      [Define to 1 if gnulib's fchdir() replacement is used.])
+    dnl We must also replace anything that can manipulate a directory fd,
+    dnl to keep our bookkeeping up-to-date.  We don't have to replace
+    dnl fstatat, since no platform has fstatat but lacks fchdir.
+    AC_CACHE_CHECK([whether open can visit directories],
+      [gl_cv_func_open_directory_works],
+      [AC_RUN_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[#include <fcntl.h>
+            ]GL_MDA_DEFINES],
+            [[return open(".", O_RDONLY) < 0;]])],
+         [gl_cv_func_open_directory_works=yes],
+         [gl_cv_func_open_directory_works=no],
+         [case "$host_os" in
+                             # Guess yes on Linux systems.
+            linux-* | linux) gl_cv_func_open_directory_works="guessing yes" ;;
+                             # Guess yes on glibc systems.
+            *-gnu* | gnu*)   gl_cv_func_open_directory_works="guessing yes" ;;
+                             # Guess no on native Windows.
+            mingw*)          gl_cv_func_open_directory_works="guessing no" ;;
+                             # If we don't know, obey --enable-cross-guesses.
+            *)               gl_cv_func_open_directory_works="$gl_cross_guess_normal" ;;
+          esac
+         ])])
+    case "$gl_cv_func_open_directory_works" in
+      *yes) ;;
+      *)
+        AC_DEFINE([REPLACE_OPEN_DIRECTORY], [1], [Define to 1 if open() should
+work around the inability to open a directory.])
+        ;;
+    esac
+  fi
+])
+
+# Determine whether to use the overrides in lib/fchdir.c.
+AC_DEFUN([gl_TEST_FCHDIR],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_CHECK_FUNCS_ONCE([fchdir])
+  if test $ac_cv_func_fchdir = no; then
+    HAVE_FCHDIR=0
+  fi
+])
+
+# Prerequisites of lib/fchdir.c.
+AC_DEFUN([gl_PREREQ_FCHDIR], [:])
diff --git a/src/grep/m4/fcntl-o.m4 b/src/grep/m4/fcntl-o.m4
new file mode 100644
index 0000000..7c459ad
--- /dev/null
+++ b/src/grep/m4/fcntl-o.m4
@@ -0,0 +1,140 @@
+# fcntl-o.m4 serial 7
+dnl Copyright (C) 2006, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Written by Paul Eggert.
+
+AC_PREREQ([2.60])
+
+# Test whether the flags O_NOATIME and O_NOFOLLOW actually work.
+# Define HAVE_WORKING_O_NOATIME to 1 if O_NOATIME works, or to 0 otherwise.
+# Define HAVE_WORKING_O_NOFOLLOW to 1 if O_NOFOLLOW works, or to 0 otherwise.
+AC_DEFUN([gl_FCNTL_O_FLAGS],
+[
+  dnl Persuade glibc <fcntl.h> to define O_NOATIME and O_NOFOLLOW.
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CHECK_HEADERS_ONCE([unistd.h])
+  AC_CHECK_FUNCS_ONCE([symlink])
+  AC_CACHE_CHECK([for working fcntl.h], [gl_cv_header_working_fcntl_h],
+    [AC_RUN_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <sys/types.h>
+           #include <sys/stat.h>
+           #if HAVE_UNISTD_H
+           # include <unistd.h>
+           #else /* on Windows with MSVC */
+           # include <io.h>
+           # include <stdlib.h>
+           # defined sleep(n) _sleep ((n) * 1000)
+           #endif
+           #include <fcntl.h>
+           ]GL_MDA_DEFINES[
+           #ifndef O_NOATIME
+            #define O_NOATIME 0
+           #endif
+           #ifndef O_NOFOLLOW
+            #define O_NOFOLLOW 0
+           #endif
+           static int const constants[] =
+            {
+              O_CREAT, O_EXCL, O_NOCTTY, O_TRUNC, O_APPEND,
+              O_NONBLOCK, O_SYNC, O_ACCMODE, O_RDONLY, O_RDWR, O_WRONLY
+            };
+          ]],
+          [[
+            int result = !constants;
+            #if HAVE_SYMLINK
+            {
+              static char const sym[] = "conftest.sym";
+              if (symlink ("/dev/null", sym) != 0)
+                result |= 2;
+              else
+                {
+                  int fd = open (sym, O_WRONLY | O_NOFOLLOW | O_CREAT, 0);
+                  if (fd >= 0)
+                    {
+                      close (fd);
+                      result |= 4;
+                    }
+                }
+              if (unlink (sym) != 0 || symlink (".", sym) != 0)
+                result |= 2;
+              else
+                {
+                  int fd = open (sym, O_RDONLY | O_NOFOLLOW);
+                  if (fd >= 0)
+                    {
+                      close (fd);
+                      result |= 4;
+                    }
+                }
+              unlink (sym);
+            }
+            #endif
+            {
+              static char const file[] = "confdefs.h";
+              int fd = open (file, O_RDONLY | O_NOATIME);
+              if (fd < 0)
+                result |= 8;
+              else
+                {
+                  struct stat st0;
+                  if (fstat (fd, &st0) != 0)
+                    result |= 16;
+                  else
+                    {
+                      char c;
+                      sleep (1);
+                      if (read (fd, &c, 1) != 1)
+                        result |= 24;
+                      else
+                        {
+                          if (close (fd) != 0)
+                            result |= 32;
+                          else
+                            {
+                              struct stat st1;
+                              if (stat (file, &st1) != 0)
+                                result |= 40;
+                              else
+                                if (st0.st_atime != st1.st_atime)
+                                  result |= 64;
+                            }
+                        }
+                    }
+                }
+            }
+            return result;]])],
+       [gl_cv_header_working_fcntl_h=yes],
+       [case $? in #(
+        4) gl_cv_header_working_fcntl_h='no (bad O_NOFOLLOW)';; #(
+        64) gl_cv_header_working_fcntl_h='no (bad O_NOATIME)';; #(
+        68) gl_cv_header_working_fcntl_h='no (bad O_NOATIME, O_NOFOLLOW)';; #(
+         *) gl_cv_header_working_fcntl_h='no';;
+        esac],
+       [case "$host_os" in
+                  # Guess 'no' on native Windows.
+          mingw*) gl_cv_header_working_fcntl_h='no' ;;
+          *)      gl_cv_header_working_fcntl_h=cross-compiling ;;
+        esac
+       ])
+    ])
+
+  case $gl_cv_header_working_fcntl_h in #(
+  *O_NOATIME* | no | cross-compiling) ac_val=0;; #(
+  *) ac_val=1;;
+  esac
+  AC_DEFINE_UNQUOTED([HAVE_WORKING_O_NOATIME], [$ac_val],
+    [Define to 1 if O_NOATIME works.])
+
+  case $gl_cv_header_working_fcntl_h in #(
+  *O_NOFOLLOW* | no | cross-compiling) ac_val=0;; #(
+  *) ac_val=1;;
+  esac
+  AC_DEFINE_UNQUOTED([HAVE_WORKING_O_NOFOLLOW], [$ac_val],
+    [Define to 1 if O_NOFOLLOW works.])
+])
diff --git a/src/grep/m4/fcntl-safer.m4 b/src/grep/m4/fcntl-safer.m4
new file mode 100644
index 0000000..0abd022
--- /dev/null
+++ b/src/grep/m4/fcntl-safer.m4
@@ -0,0 +1,16 @@
+#serial 9
+dnl Copyright (C) 2005-2007, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FCNTL_SAFER],
+[
+  dnl Prerequisites of lib/open-safer.c.
+  AC_REQUIRE([gl_PROMOTED_TYPE_MODE_T])
+])
+
+AC_DEFUN([gl_OPENAT_SAFER],
+[
+  AC_REQUIRE([gl_FCNTL_SAFER])
+])
diff --git a/src/grep/m4/fcntl.m4 b/src/grep/m4/fcntl.m4
new file mode 100644
index 0000000..f626434
--- /dev/null
+++ b/src/grep/m4/fcntl.m4
@@ -0,0 +1,151 @@
+# fcntl.m4 serial 11
+dnl Copyright (C) 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# For now, this module ensures that fcntl()
+# - supports F_DUPFD correctly
+# - supports or emulates F_DUPFD_CLOEXEC
+# - supports F_GETFD
+# Still to be ported to mingw:
+# - F_SETFD
+# - F_GETFL, F_SETFL
+# - F_GETOWN, F_SETOWN
+# - F_GETLK, F_SETLK, F_SETLKW
+AC_DEFUN([gl_FUNC_FCNTL],
+[
+  dnl Persuade glibc to expose F_DUPFD_CLOEXEC.
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+  AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CHECK_FUNCS_ONCE([fcntl])
+  if test $ac_cv_func_fcntl = no; then
+    gl_REPLACE_FCNTL
+  else
+    dnl cygwin 1.5.x F_DUPFD has wrong errno, and allows negative target
+    dnl haiku alpha 2 F_DUPFD has wrong errno
+    AC_CACHE_CHECK([whether fcntl handles F_DUPFD correctly],
+      [gl_cv_func_fcntl_f_dupfd_works],
+      [AC_RUN_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[#include <errno.h>
+              #include <fcntl.h>
+              #include <limits.h>
+              #include <sys/resource.h>
+              #include <unistd.h>
+              ]GL_MDA_DEFINES[
+              #ifndef RLIM_SAVED_CUR
+              # define RLIM_SAVED_CUR RLIM_INFINITY
+              #endif
+              #ifndef RLIM_SAVED_MAX
+              # define RLIM_SAVED_MAX RLIM_INFINITY
+              #endif
+            ]],
+            [[int result = 0;
+              int bad_fd = INT_MAX;
+              struct rlimit rlim;
+              if (getrlimit (RLIMIT_NOFILE, &rlim) == 0
+                  && 0 <= rlim.rlim_cur && rlim.rlim_cur <= INT_MAX
+                  && rlim.rlim_cur != RLIM_INFINITY
+                  && rlim.rlim_cur != RLIM_SAVED_MAX
+                  && rlim.rlim_cur != RLIM_SAVED_CUR)
+                bad_fd = rlim.rlim_cur;
+              if (fcntl (0, F_DUPFD, -1) != -1) result |= 1;
+              if (errno != EINVAL) result |= 2;
+              if (fcntl (0, F_DUPFD, bad_fd) != -1) result |= 4;
+              if (errno != EINVAL) result |= 8;
+              /* On OS/2 kLIBC, F_DUPFD does not work on a directory fd */
+              {
+                int fd;
+                fd = open (".", O_RDONLY);
+                if (fd == -1)
+                  result |= 16;
+                else if (fcntl (fd, F_DUPFD, STDERR_FILENO + 1) == -1)
+                  result |= 32;
+
+                close (fd);
+              }
+              return result;]])],
+         [gl_cv_func_fcntl_f_dupfd_works=yes],
+         [gl_cv_func_fcntl_f_dupfd_works=no],
+         [case $host_os in
+            aix* | cygwin* | haiku*)
+               gl_cv_func_fcntl_f_dupfd_works="guessing no" ;;
+            *) gl_cv_func_fcntl_f_dupfd_works="guessing yes" ;;
+          esac])])
+    case $gl_cv_func_fcntl_f_dupfd_works in
+      *yes) ;;
+      *) gl_REPLACE_FCNTL
+        AC_DEFINE([FCNTL_DUPFD_BUGGY], [1], [Define this to 1 if F_DUPFD
+          behavior does not match POSIX]) ;;
+    esac
+
+    dnl Many systems lack F_DUPFD_CLOEXEC.
+    dnl NetBSD 9.0 declares F_DUPFD_CLOEXEC but it works only like F_DUPFD.
+    AC_CACHE_CHECK([whether fcntl understands F_DUPFD_CLOEXEC],
+      [gl_cv_func_fcntl_f_dupfd_cloexec],
+      [AC_RUN_IFELSE(
+         [AC_LANG_SOURCE(
+            [[#include <fcntl.h>
+              #include <unistd.h>
+              int main (int argc, char *argv[])
+              {
+                if (argc == 1)
+                  /* parent process */
+                  {
+                    if (fcntl (1, F_DUPFD_CLOEXEC, 10) < 0)
+                      return 1;
+                    return execl ("./conftest", "./conftest", "child", NULL);
+                  }
+                else
+                  /* child process */
+                  return (fcntl (10, F_GETFL) < 0 ? 0 : 42);
+              }
+            ]])
+         ],
+         [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#ifdef __linux__
+/* The Linux kernel only added F_DUPFD_CLOEXEC in 2.6.24, so we always replace
+   it to support the semantics on older kernels that failed with EINVAL.  */
+choke me
+#endif
+           ]])],
+           [gl_cv_func_fcntl_f_dupfd_cloexec=yes],
+           [gl_cv_func_fcntl_f_dupfd_cloexec="needs runtime check"])
+         ],
+         [gl_cv_func_fcntl_f_dupfd_cloexec=no],
+         [case "$host_os" in
+                     # Guess no on NetBSD.
+            netbsd*) gl_cv_func_fcntl_f_dupfd_cloexec="guessing no" ;;
+            *)       gl_cv_func_fcntl_f_dupfd_cloexec="$gl_cross_guess_normal" ;;
+          esac
+         ])
+      ])
+    case "$gl_cv_func_fcntl_f_dupfd_cloexec" in
+      *yes) ;;
+      *)    gl_REPLACE_FCNTL
+            dnl No witness macro needed for this bug.
+            ;;
+    esac
+  fi
+  dnl Replace fcntl() for supporting the gnulib-defined fchdir() function,
+  dnl to keep fchdir's bookkeeping up-to-date.
+  m4_ifdef([gl_FUNC_FCHDIR], [
+    gl_TEST_FCHDIR
+    if test $HAVE_FCHDIR = 0; then
+      gl_REPLACE_FCNTL
+    fi
+  ])
+])
+
+AC_DEFUN([gl_REPLACE_FCNTL],
+[
+  AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
+  AC_CHECK_FUNCS_ONCE([fcntl])
+  if test $ac_cv_func_fcntl = no; then
+    HAVE_FCNTL=0
+  else
+    REPLACE_FCNTL=1
+  fi
+])
diff --git a/src/grep/m4/fcntl_h.m4 b/src/grep/m4/fcntl_h.m4
new file mode 100644
index 0000000..aba4473
--- /dev/null
+++ b/src/grep/m4/fcntl_h.m4
@@ -0,0 +1,70 @@
+# serial 20
+# Configure fcntl.h.
+dnl Copyright (C) 2006-2007, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Written by Paul Eggert.
+
+AC_DEFUN_ONCE([gl_FCNTL_H],
+[
+  AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
+  AC_REQUIRE([gl_FCNTL_O_FLAGS])
+  gl_NEXT_HEADERS([fcntl.h])
+
+  dnl Ensure the type pid_t gets defined.
+  AC_REQUIRE([AC_TYPE_PID_T])
+
+  dnl Ensure the type mode_t gets defined.
+  AC_REQUIRE([AC_TYPE_MODE_T])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use, if it is not common
+  dnl enough to be declared everywhere.
+  gl_WARN_ON_USE_PREPARE([[#include <fcntl.h>
+    ]], [fcntl openat])
+])
+
+# gl_FCNTL_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_FCNTL_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_FCNTL_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_FCNTL_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_FCNTL_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_CREAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FCNTL])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_NONBLOCKING])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_OPEN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_OPENAT])
+    dnl Support Microsoft deprecated alias function names by default.
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_CREAT], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_OPEN], [1])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_FCNTL_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_FCNTL_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_FCNTL=1;          AC_SUBST([HAVE_FCNTL])
+  HAVE_OPENAT=1;         AC_SUBST([HAVE_OPENAT])
+  REPLACE_CREAT=0;       AC_SUBST([REPLACE_CREAT])
+  REPLACE_FCNTL=0;       AC_SUBST([REPLACE_FCNTL])
+  REPLACE_OPEN=0;        AC_SUBST([REPLACE_OPEN])
+  REPLACE_OPENAT=0;      AC_SUBST([REPLACE_OPENAT])
+])
diff --git a/src/grep/m4/fdopen.m4 b/src/grep/m4/fdopen.m4
new file mode 100644
index 0000000..e41ed63
--- /dev/null
+++ b/src/grep/m4/fdopen.m4
@@ -0,0 +1,51 @@
+# fdopen.m4 serial 5
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_FDOPEN],
+[
+  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  m4_ifdef([gl_MSVC_INVAL], [
+    AC_REQUIRE([gl_MSVC_INVAL])
+    if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+      REPLACE_FDOPEN=1
+    fi
+  ])
+  if test $REPLACE_FDOPEN = 0; then
+    dnl Test whether fdopen() sets errno when it fails due to a bad fd argument.
+    AC_CACHE_CHECK([whether fdopen sets errno], [gl_cv_func_fdopen_works],
+      [
+        AC_RUN_IFELSE(
+          [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <errno.h>
+]GL_MDA_DEFINES[
+int
+main (void)
+{
+  FILE *fp;
+  errno = 0;
+  fp = fdopen (-1, "r");
+  if (fp == NULL && errno == 0)
+    return 1;
+  return 0;
+}]])],
+          [gl_cv_func_fdopen_works=yes],
+          [gl_cv_func_fdopen_works=no],
+          [case "$host_os" in
+             mingw*) gl_cv_func_fdopen_works="guessing no" ;;
+             *)      gl_cv_func_fdopen_works="guessing yes" ;;
+           esac
+          ])
+      ])
+    case "$gl_cv_func_fdopen_works" in
+      *no) REPLACE_FDOPEN=1 ;;
+    esac
+  fi
+])
+
+dnl Prerequisites of lib/fdopen.c.
+AC_DEFUN([gl_PREREQ_FDOPEN], [])
diff --git a/src/grep/m4/fdopendir.m4 b/src/grep/m4/fdopendir.m4
new file mode 100644
index 0000000..d428380
--- /dev/null
+++ b/src/grep/m4/fdopendir.m4
@@ -0,0 +1,67 @@
+# serial 14
+# See if we need to provide fdopendir.
+
+dnl Copyright (C) 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# Written by Eric Blake.
+
+AC_DEFUN([gl_FUNC_FDOPENDIR],
+[
+  AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+  dnl FreeBSD 7.3 has the function, but failed to declare it.
+  AC_CHECK_DECLS([fdopendir], [], [HAVE_DECL_FDOPENDIR=0], [[
+#include <dirent.h>
+    ]])
+  AC_CHECK_FUNCS_ONCE([fdopendir])
+  if test $ac_cv_func_fdopendir = no; then
+    HAVE_FDOPENDIR=0
+  else
+    AC_CACHE_CHECK([whether fdopendir works],
+      [gl_cv_func_fdopendir_works],
+      [AC_RUN_IFELSE(
+         [AC_LANG_PROGRAM([[
+#include <dirent.h>
+#include <fcntl.h>
+#include <unistd.h>
+]GL_MDA_DEFINES[
+#if !HAVE_DECL_FDOPENDIR
+extern
+# ifdef __cplusplus
+"C"
+# endif
+DIR *fdopendir (int);
+#endif
+]],
+            [[int result = 0;
+              int fd = open ("conftest.c", O_RDONLY);
+              if (fd < 0) result |= 1;
+              if (fdopendir (fd)) result |= 2;
+              if (close (fd)) result |= 4;
+              return result;
+            ]])],
+         [gl_cv_func_fdopendir_works=yes],
+         [gl_cv_func_fdopendir_works=no],
+         [case "$host_os" in
+                     # Guess yes on glibc systems.
+            *-gnu*)  gl_cv_func_fdopendir_works="guessing yes" ;;
+                     # Guess yes on musl systems.
+            *-musl*) gl_cv_func_fdopendir_works="guessing yes" ;;
+                     # If we don't know, obey --enable-cross-guesses.
+            *)       gl_cv_func_fdopendir_works="$gl_cross_guess_normal" ;;
+          esac
+         ])])
+    case "$gl_cv_func_fdopendir_works" in
+      *yes) ;;
+      *)
+        REPLACE_FDOPENDIR=1
+        ;;
+    esac
+  fi
+])
diff --git a/src/grep/m4/filenamecat.m4 b/src/grep/m4/filenamecat.m4
new file mode 100644
index 0000000..e6eac12
--- /dev/null
+++ b/src/grep/m4/filenamecat.m4
@@ -0,0 +1,16 @@
+# filenamecat.m4 serial 11
+dnl Copyright (C) 2002-2006, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FILE_NAME_CONCAT],
+[
+  AC_REQUIRE([gl_FILE_NAME_CONCAT_LGPL])
+])
+
+AC_DEFUN([gl_FILE_NAME_CONCAT_LGPL],
+[
+  dnl Prerequisites of lib/filenamecat-lgpl.c.
+  AC_CHECK_FUNCS_ONCE([mempcpy])
+])
diff --git a/src/grep/m4/flexmember.m4 b/src/grep/m4/flexmember.m4
new file mode 100644
index 0000000..49b1c75
--- /dev/null
+++ b/src/grep/m4/flexmember.m4
@@ -0,0 +1,44 @@
+# serial 5
+# Check for flexible array member support.
+
+# Copyright (C) 2006, 2009-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# Written by Paul Eggert.
+
+AC_DEFUN([AC_C_FLEXIBLE_ARRAY_MEMBER],
+[
+  AC_CACHE_CHECK([for flexible array member],
+    ac_cv_c_flexmember,
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <stdlib.h>
+            #include <stdio.h>
+            #include <stddef.h>
+            struct m { struct m *next, **list; char name[]; };
+            struct s { struct s *p; struct m *m; int n; double d[]; };]],
+          [[int m = getchar ();
+            size_t nbytes = offsetof (struct s, d) + m * sizeof (double);
+            nbytes += sizeof (struct s) - 1;
+            nbytes -= nbytes % sizeof (struct s);
+            struct s *p = malloc (nbytes);
+            p->p = p;
+            p->m = NULL;
+            p->d[0] = 0.0;
+            return p->d != (double *) NULL;]])],
+       [ac_cv_c_flexmember=yes],
+       [ac_cv_c_flexmember=no])])
+  if test $ac_cv_c_flexmember = yes; then
+    AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [],
+      [Define to nothing if C supports flexible array members, and to
+       1 if it does not.  That way, with a declaration like 'struct s
+       { int n; short d@<:@FLEXIBLE_ARRAY_MEMBER@:>@; };', the struct hack
+       can be used with pre-C99 compilers.
+       Use 'FLEXSIZEOF (struct s, d, N * sizeof (short))' to calculate
+       the size in bytes of such a struct containing an N-element array.])
+  else
+    AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1])
+  fi
+])
diff --git a/src/grep/m4/float_h.m4 b/src/grep/m4/float_h.m4
new file mode 100644
index 0000000..ba38a28
--- /dev/null
+++ b/src/grep/m4/float_h.m4
@@ -0,0 +1,108 @@
+# float_h.m4 serial 12
+dnl Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FLOAT_H],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  FLOAT_H=
+  REPLACE_FLOAT_LDBL=0
+  case "$host_os" in
+    aix* | beos* | openbsd* | mirbsd* | irix*)
+      FLOAT_H=float.h
+      ;;
+    freebsd* | dragonfly*)
+      case "$host_cpu" in
+changequote(,)dnl
+        i[34567]86 )
+changequote([,])dnl
+          FLOAT_H=float.h
+          ;;
+        x86_64 )
+          # On x86_64 systems, the C compiler may still be generating
+          # 32-bit code.
+          AC_COMPILE_IFELSE(
+            [AC_LANG_SOURCE(
+               [[#if defined __LP64__ || defined __x86_64__ || defined __amd64__
+                  int ok;
+                 #else
+                  error fail
+                 #endif
+               ]])],
+            [],
+            [FLOAT_H=float.h])
+          ;;
+      esac
+      ;;
+    linux*)
+      case "$host_cpu" in
+        powerpc*)
+          FLOAT_H=float.h
+          ;;
+      esac
+      ;;
+  esac
+  case "$host_os" in
+    aix* | freebsd* | dragonfly* | linux*)
+      if test -n "$FLOAT_H"; then
+        REPLACE_FLOAT_LDBL=1
+      fi
+      ;;
+  esac
+
+  dnl Test against glibc-2.7 Linux/SPARC64 bug.
+  REPLACE_ITOLD=0
+  AC_CACHE_CHECK([whether conversion from 'int' to 'long double' works],
+    [gl_cv_func_itold_works],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+int i = -1;
+volatile long double ld;
+int main ()
+{
+  ld += i * 1.0L;
+  if (ld > 0)
+    return 1;
+  return 0;
+}]])],
+        [gl_cv_func_itold_works=yes],
+        [gl_cv_func_itold_works=no],
+        [case "$host" in
+           sparc*-*-linux*)
+             AC_COMPILE_IFELSE(
+               [AC_LANG_SOURCE(
+                 [[#if defined __LP64__ || defined __arch64__
+                    int ok;
+                   #else
+                    error fail
+                   #endif
+                 ]])],
+               [gl_cv_func_itold_works="guessing no"],
+               [gl_cv_func_itold_works="guessing yes"])
+             ;;
+                   # Guess yes on native Windows.
+           mingw*) gl_cv_func_itold_works="guessing yes" ;;
+           *)      gl_cv_func_itold_works="guessing yes" ;;
+         esac
+        ])
+    ])
+  case "$gl_cv_func_itold_works" in
+    *no)
+      REPLACE_ITOLD=1
+      dnl We add the workaround to <float.h> but also to <math.h>,
+      dnl to increase the chances that the fix function gets pulled in.
+      FLOAT_H=float.h
+      ;;
+  esac
+
+  if test -n "$FLOAT_H"; then
+    gl_NEXT_HEADERS([float.h])
+  fi
+  AC_SUBST([FLOAT_H])
+  AM_CONDITIONAL([GL_GENERATE_FLOAT_H], [test -n "$FLOAT_H"])
+  AC_SUBST([REPLACE_ITOLD])
+])
diff --git a/src/grep/m4/fnmatch.m4 b/src/grep/m4/fnmatch.m4
new file mode 100644
index 0000000..81589ca
--- /dev/null
+++ b/src/grep/m4/fnmatch.m4
@@ -0,0 +1,153 @@
+# Check for fnmatch - serial 15.  -*- coding: utf-8 -*-
+
+# Copyright (C) 2000-2007, 2009-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# Autoconf defines AC_FUNC_FNMATCH, but that is obsolescent.
+# New applications should use the macros below instead.
+
+# Request a POSIX compliant fnmatch function.
+AC_DEFUN([gl_FUNC_FNMATCH_POSIX],
+[
+  m4_divert_text([DEFAULTS], [gl_fnmatch_required=POSIX])
+
+  AC_REQUIRE([gl_FNMATCH_H])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  gl_fnmatch_required_lowercase=`
+    echo $gl_fnmatch_required | LC_ALL=C tr '[[A-Z]]' '[[a-z]]'
+  `
+  AC_CHECK_FUNCS_ONCE([fnmatch])
+  if test $ac_cv_func_fnmatch = no; then
+    HAVE_FNMATCH=0
+  else
+    gl_fnmatch_cache_var="gl_cv_func_fnmatch_${gl_fnmatch_required_lowercase}"
+    AC_CACHE_CHECK([for working $gl_fnmatch_required fnmatch],
+      [$gl_fnmatch_cache_var],
+      [dnl Some versions of Solaris, SCO, and the GNU C Library
+       dnl have a broken or incompatible fnmatch.
+       dnl So we run a test program.  If we are cross-compiling, take no chance.
+       dnl Thanks to John Oleynick, François Pinard, and Paul Eggert for this
+       dnl test.
+       if test $gl_fnmatch_required = GNU; then
+         gl_fnmatch_gnu_start=
+         gl_fnmatch_gnu_end=
+       else
+         gl_fnmatch_gnu_start='#if 0'
+         gl_fnmatch_gnu_end='#endif'
+       fi
+       AC_RUN_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[#include <fnmatch.h>
+              static int
+              y (char const *pattern, char const *string, int flags)
+              {
+                return fnmatch (pattern, string, flags) == 0;
+              }
+              static int
+              n (char const *pattern, char const *string, int flags)
+              {
+                return fnmatch (pattern, string, flags) == FNM_NOMATCH;
+              }
+            ]],
+            [[char const *Apat = 'A' < '\\\\' ? "[A-\\\\\\\\]" : "[\\\\\\\\-A]";
+              char const *apat = 'a' < '\\\\' ? "[a-\\\\\\\\]" : "[\\\\\\\\-a]";
+              static char const A_1[] = { 'A' - 1, 0 };
+              static char const A01[] = { 'A' + 1, 0 };
+              static char const a_1[] = { 'a' - 1, 0 };
+              static char const a01[] = { 'a' + 1, 0 };
+              static char const bs_1[] = { '\\\\' - 1, 0 };
+              static char const bs01[] = { '\\\\' + 1, 0 };
+              int result = 0;
+              if (!n ("a*", "", 0))
+                return 1;
+              if (!y ("a*", "abc", 0))
+                return 1;
+              if (!y ("[/b", "[/b", 0)) /*"]]"*/ /* glibc Bugzilla bug 12378 */
+                return 1;
+              if (!n ("d*/*1", "d/s/1", FNM_PATHNAME))
+                return 2;
+              if (!y ("a\\\\bc", "abc", 0))
+                return 3;
+              if (!n ("a\\\\bc", "abc", FNM_NOESCAPE))
+                return 3;
+              if (!y ("*x", ".x", 0))
+                return 4;
+              if (!n ("*x", ".x", FNM_PERIOD))
+                return 4;
+              if (!y (Apat, "\\\\", 0))
+                return 5;
+              if (!y (Apat, "A", 0))
+                return 5;
+              if (!y (apat, "\\\\", 0))
+                return 5;
+              if (!y (apat, "a", 0))
+                return 5;
+              if (!(n (Apat, A_1, 0) == ('A' < '\\\\')))
+                return 5;
+              if (!(n (apat, a_1, 0) == ('a' < '\\\\')))
+                return 5;
+              if (!(y (Apat, A01, 0) == ('A' < '\\\\')))
+                return 5;
+              if (!(y (apat, a01, 0) == ('a' < '\\\\')))
+                return 5;
+              if (!(y (Apat, bs_1, 0) == ('A' < '\\\\')))
+                return 5;
+              if (!(y (apat, bs_1, 0) == ('a' < '\\\\')))
+                return 5;
+              if (!(n (Apat, bs01, 0) == ('A' < '\\\\')))
+                return 5;
+              if (!(n (apat, bs01, 0) == ('a' < '\\\\')))
+                return 5;
+              $gl_fnmatch_gnu_start
+              if (!y ("xxXX", "xXxX", FNM_CASEFOLD))
+                result |= 8;
+              if (!y ("a++(x|yy)b", "a+xyyyyxb", FNM_EXTMATCH))
+                result |= 16;
+              if (!n ("d*/*1", "d/s/1", FNM_FILE_NAME))
+                result |= 32;
+              if (!y ("*", "x", FNM_FILE_NAME | FNM_LEADING_DIR))
+                result |= 64;
+              if (!y ("x*", "x/y/z", FNM_FILE_NAME | FNM_LEADING_DIR))
+                result |= 64;
+              if (!y ("*c*", "c/x", FNM_FILE_NAME | FNM_LEADING_DIR))
+                result |= 64;
+              $gl_fnmatch_gnu_end
+              return result;
+            ]])],
+         [eval "$gl_fnmatch_cache_var=yes"],
+         [eval "$gl_fnmatch_cache_var=no"],
+         [case "$host_os" in
+                     # Guess yes on musl systems.
+            *-musl*) eval "$gl_fnmatch_cache_var=\"guessing yes\"" ;;
+                     # Guess no otherwise, even on glibc systems.
+            *)       eval "$gl_fnmatch_cache_var=\"guessing no\"" ;;
+          esac
+         ])
+      ])
+    eval "gl_fnmatch_result=\"\$$gl_fnmatch_cache_var\""
+    case "$gl_fnmatch_result" in
+      *yes) ;;
+      *) REPLACE_FNMATCH=1 ;;
+    esac
+  fi
+  if test $HAVE_FNMATCH = 0 || test $REPLACE_FNMATCH = 1; then
+    gl_REPLACE_FNMATCH_H
+  fi
+])
+
+# Request a POSIX compliant fnmatch function with GNU extensions.
+AC_DEFUN([gl_FUNC_FNMATCH_GNU],
+[
+  m4_divert_text([INIT_PREPARE], [gl_fnmatch_required=GNU])
+
+  AC_REQUIRE([gl_FUNC_FNMATCH_POSIX])
+])
+
+AC_DEFUN([gl_PREREQ_FNMATCH],
+[
+  dnl Prerequisites of lib/fnmatch.c.
+  AC_REQUIRE([AC_TYPE_MBSTATE_T])
+  AC_CHECK_FUNCS_ONCE([mbsrtowcs])
+])
diff --git a/src/grep/m4/fnmatch_h.m4 b/src/grep/m4/fnmatch_h.m4
new file mode 100644
index 0000000..e9bcb66
--- /dev/null
+++ b/src/grep/m4/fnmatch_h.m4
@@ -0,0 +1,90 @@
+# fnmatch_h.m4 serial 7
+dnl Copyright (C) 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+
+AC_DEFUN_ONCE([gl_FNMATCH_H],
+[
+  AC_REQUIRE([gl_FNMATCH_H_DEFAULTS])
+  m4_ifdef([gl_ANSI_CXX], [AC_REQUIRE([gl_ANSI_CXX])])
+  AC_CHECK_HEADERS_ONCE([fnmatch.h])
+  gl_CHECK_NEXT_HEADERS([fnmatch.h])
+
+  dnl Persuade glibc <fnmatch.h> to declare FNM_CASEFOLD etc.
+  dnl This is only needed if gl_fnmatch_required = GNU. It would be possible
+  dnl to avoid this dependency for gl_FUNC_FNMATCH_POSIX by putting
+  dnl gl_FUNC_FNMATCH_GNU into a separate .m4 file.
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  if test $ac_cv_header_fnmatch_h = yes; then
+    HAVE_FNMATCH_H=1
+  else
+    HAVE_FNMATCH_H=0
+  fi
+  AC_SUBST([HAVE_FNMATCH_H])
+
+  m4_ifdef([gl_POSIXCHECK],
+    [FNMATCH_H=fnmatch.h],
+    [FNMATCH_H=''
+     if m4_ifdef([gl_ANSI_CXX], [test "$CXX" != no], [false]); then
+       dnl Override <fnmatch.h> always, to support the C++ GNULIB_NAMESPACE.
+       FNMATCH_H=fnmatch.h
+     else
+       if test $ac_cv_header_fnmatch_h != yes; then
+         dnl Provide a substitute <fnmatch.h> file.
+         FNMATCH_H=fnmatch.h
+       fi
+     fi
+    ])
+  AC_SUBST([FNMATCH_H])
+  AM_CONDITIONAL([GL_GENERATE_FNMATCH_H], [test -n "$FNMATCH_H"])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[#include <fnmatch.h>
+    ]],
+    [fnmatch])
+])
+
+dnl Unconditionally enables the replacement of <fnmatch.h>.
+AC_DEFUN([gl_REPLACE_FNMATCH_H],
+[
+  gl_FNMATCH_H_REQUIRE_DEFAULTS
+  FNMATCH_H='fnmatch.h'
+  AM_CONDITIONAL([GL_GENERATE_FNMATCH_H], [test -n "$FNMATCH_H"])
+])
+
+# gl_FNMATCH_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_FNMATCH_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_FNMATCH_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_FNMATCH_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_FNMATCH_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FNMATCH])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_FNMATCH_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_FNMATCH_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_FNMATCH_H_DEFAULTS],
+[
+  dnl Assume POSIX behavior unless another module says otherwise.
+  HAVE_FNMATCH=1;            AC_SUBST([HAVE_FNMATCH])
+  REPLACE_FNMATCH=0;         AC_SUBST([REPLACE_FNMATCH])
+])
diff --git a/src/grep/m4/fopen.m4 b/src/grep/m4/fopen.m4
new file mode 100644
index 0000000..4ed7dce
--- /dev/null
+++ b/src/grep/m4/fopen.m4
@@ -0,0 +1,148 @@
+# fopen.m4 serial 12
+dnl Copyright (C) 2007-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_FOPEN],
+[
+  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  case "$host_os" in
+    mingw* | pw*)
+      dnl Replace fopen, for handling of "/dev/null".
+      REPLACE_FOPEN=1
+      dnl fopen on mingw also has the trailing slash bug.
+      gl_cv_func_fopen_slash="guessing no"
+      ;;
+    *)
+      dnl fopen("foo/", "w") should not create a file when the file name has a
+      dnl trailing slash.
+      AC_CACHE_CHECK([whether fopen recognizes a trailing slash],
+        [gl_cv_func_fopen_slash],
+        [
+          AC_RUN_IFELSE(
+            [AC_LANG_SOURCE([[
+#include <stddef.h>
+#include <stdio.h>
+int main ()
+{
+  FILE *fp = fopen ("conftest.sl/", "w");
+  int result = (fp != NULL);
+  if (fp != NULL)
+    fclose (fp);
+  return result;
+}]])],
+            [gl_cv_func_fopen_slash=yes],
+            [gl_cv_func_fopen_slash=no],
+            [
+changequote(,)dnl
+             case "$host_os" in
+               aix* | hpux* | solaris2.[0-9] | solaris2.[0-9].*)
+                 gl_cv_func_fopen_slash="guessing no" ;;
+               *)
+                 gl_cv_func_fopen_slash="guessing yes" ;;
+             esac
+changequote([,])dnl
+            ])
+          rm -f conftest.sl
+        ])
+      ;;
+  esac
+  case "$gl_cv_func_fopen_slash" in
+    *no)
+      AC_DEFINE([FOPEN_TRAILING_SLASH_BUG], [1],
+        [Define to 1 if fopen() fails to recognize a trailing slash.])
+      REPLACE_FOPEN=1
+      ;;
+  esac
+])
+
+AC_DEFUN([gl_FUNC_FOPEN_GNU],
+[
+  AC_REQUIRE([gl_FUNC_FOPEN])
+  AC_CACHE_CHECK([whether fopen supports the mode character 'x'],
+    [gl_cv_func_fopen_mode_x],
+    [rm -f conftest.x
+     AC_RUN_IFELSE(
+       [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <errno.h>
+int main ()
+{
+  FILE *fp;
+  fp = fopen ("conftest.x", "w");
+  fclose (fp);
+  fp = fopen ("conftest.x", "wx");
+  if (fp != NULL)
+    /* 'x' ignored */
+    return 1;
+  else if (errno == EEXIST)
+    return 0;
+  else
+    /* 'x' rejected */
+    return 2;
+}]])],
+       [gl_cv_func_fopen_mode_x=yes],
+       [gl_cv_func_fopen_mode_x=no],
+       [case "$host_os" in
+          # Guess yes on glibc and musl systems.
+          linux*-gnu* | gnu* | kfreebsd*-gnu | *-musl*)
+            gl_cv_func_fopen_mode_x="guessing yes" ;;
+          # If we don't know, obey --enable-cross-guesses.
+          *)
+            gl_cv_func_fopen_mode_x="$gl_cross_guess_normal" ;;
+        esac
+       ])
+     rm -f conftest.x
+    ])
+  AC_CACHE_CHECK([whether fopen supports the mode character 'e'],
+    [gl_cv_func_fopen_mode_e],
+    [echo foo > conftest.x
+     AC_RUN_IFELSE(
+       [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+]GL_MDA_DEFINES[
+int main ()
+{
+  FILE *fp = fopen ("conftest.x", "re");
+  if (fp != NULL)
+    {
+      if (fcntl (fileno (fp), F_GETFD) & FD_CLOEXEC)
+        return 0;
+      else
+        /* 'e' ignored */
+        return 1;
+    }
+  else
+    /* 'e' rejected */
+    return 2;
+}]])],
+       [gl_cv_func_fopen_mode_e=yes],
+       [gl_cv_func_fopen_mode_e=no],
+       [case "$host_os" in
+          # Guess yes on glibc and musl systems.
+          linux*-gnu* | gnu* | kfreebsd*-gnu | *-musl*)
+            gl_cv_func_fopen_mode_e="guessing yes" ;;
+          # Guess no on native Windows.
+          mingw*)
+            gl_cv_func_fopen_mode_e="guessing no" ;;
+          # If we don't know, obey --enable-cross-guesses.
+          *)
+            gl_cv_func_fopen_mode_e="$gl_cross_guess_normal" ;;
+        esac
+       ])
+     rm -f conftest.x
+    ])
+  case "$gl_cv_func_fopen_mode_x" in
+    *no) REPLACE_FOPEN=1 ;;
+  esac
+  case "$gl_cv_func_fopen_mode_e" in
+    *no) REPLACE_FOPEN=1 ;;
+  esac
+])
+
+# Prerequisites of lib/fopen.c.
+AC_DEFUN([gl_PREREQ_FOPEN], [:])
diff --git a/src/grep/m4/fpending.m4 b/src/grep/m4/fpending.m4
new file mode 100644
index 0000000..131356a
--- /dev/null
+++ b/src/grep/m4/fpending.m4
@@ -0,0 +1,36 @@
+# serial 23
+
+# Copyright (C) 2000-2001, 2004-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+dnl From Jim Meyering
+dnl Using code from emacs, based on suggestions from Paul Eggert
+dnl and Ulrich Drepper.
+
+dnl Find out how to determine the number of pending output bytes on a stream.
+dnl glibc (2.1.93 and newer) and Solaris provide __fpending.  On other systems,
+dnl we have to grub around in the (possibly opaque) FILE struct.
+
+AC_DEFUN([gl_FUNC_FPENDING],
+[
+  AC_CHECK_HEADERS_ONCE([stdio_ext.h])
+  fp_headers='
+    #include <stdio.h>
+    #if HAVE_STDIO_EXT_H
+    # include <stdio_ext.h>
+    #endif
+  '
+  AC_CACHE_CHECK([for __fpending], [gl_cv_func___fpending],
+    [
+      AC_LINK_IFELSE(
+        [AC_LANG_PROGRAM([[$fp_headers]],
+           [[return ! __fpending (stdin);]])],
+        [gl_cv_func___fpending=yes],
+        [gl_cv_func___fpending=no])
+    ])
+  if test $gl_cv_func___fpending = yes; then
+    AC_CHECK_DECLS([__fpending], [], [], [$fp_headers])
+  fi
+])
diff --git a/src/grep/m4/fpieee.m4 b/src/grep/m4/fpieee.m4
new file mode 100644
index 0000000..3f16957
--- /dev/null
+++ b/src/grep/m4/fpieee.m4
@@ -0,0 +1,54 @@
+# fpieee.m4 serial 2  -*- coding: utf-8 -*-
+dnl Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl IEEE 754 standardized three items:
+dnl - The formats of single-float and double-float - nowadays commonly
+dnl   available as 'float' and 'double' in C and C++.
+dnl   No autoconf test needed.
+dnl - The overflow and division by zero behaviour: The result are values
+dnl   '±Inf' and 'NaN', rather than exceptions as it was before.
+dnl   This file provides an autoconf macro for ensuring this behaviour of
+dnl   floating-point operations.
+dnl - A set of conditions (overflow, underflow, inexact, etc.) which can
+dnl   be configured to trigger an exception.
+dnl   This cannot be done in a portable way: it depends on the compiler,
+dnl   libc, kernel, and CPU.  No autoconf macro is provided for this.
+
+dnl Ensure non-trapping behaviour of floating-point overflow and
+dnl floating-point division by zero.
+dnl (For integer overflow, see gcc's -ftrapv option; for integer division by
+dnl zero, see the autoconf macro in intdiv0.m4.)
+
+AC_DEFUN([gl_FP_IEEE],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  # IEEE behaviour is the default on all CPUs except Alpha and SH
+  # (according to the test results of Bruno Haible's ieeefp/fenv_default.m4
+  # and the GCC 4.1.2 manual).
+  case "$host_cpu" in
+    alpha*)
+      # On Alpha systems, a compiler option provides the behaviour.
+      # See the ieee(3) manual page, also available at
+      # <https://backdrift.org/man/tru64/man3/ieee.3.html>
+      if test -n "$GCC"; then
+        # GCC has the option -mieee.
+        # For full IEEE compliance (rarely needed), use option -mieee-with-inexact.
+        CPPFLAGS="$CPPFLAGS -mieee"
+      else
+        # Compaq (ex-DEC) C has the option -ieee, equivalent to -ieee_with_no_inexact.
+        # For full IEEE compliance (rarely needed), use option -ieee_with_inexact.
+        CPPFLAGS="$CPPFLAGS -ieee"
+      fi
+      ;;
+    sh*)
+      if test -n "$GCC"; then
+        # GCC has the option -mieee.
+        CPPFLAGS="$CPPFLAGS -mieee"
+      fi
+      ;;
+  esac
+])
diff --git a/src/grep/m4/free.m4 b/src/grep/m4/free.m4
new file mode 100644
index 0000000..a7923b9
--- /dev/null
+++ b/src/grep/m4/free.m4
@@ -0,0 +1,52 @@
+# free.m4 serial 6
+# Copyright (C) 2003-2005, 2009-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# Written by Paul Eggert and Bruno Haible.
+
+AC_DEFUN([gl_FUNC_FREE],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+
+  dnl In the next release of POSIX, free must preserve errno.
+  dnl https://www.austingroupbugs.net/view.php?id=385
+  dnl https://sourceware.org/bugzilla/show_bug.cgi?id=17924
+  dnl So far, we know of three platforms that do this:
+  dnl * glibc >= 2.33, thanks to the fix for this bug:
+  dnl   <https://sourceware.org/bugzilla/show_bug.cgi?id=17924>
+  dnl * OpenBSD >= 4.5, thanks to this commit:
+  dnl   <https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdlib/malloc.c.diff?r1=1.100&r2=1.101&f=h>
+  dnl * Solaris, because its malloc() implementation is based on brk(),
+  dnl   not mmap(); hence its free() implementation makes no system calls.
+  dnl For other platforms, you can only be sure if they state it in their
+  dnl documentation, or by code inspection of the free() implementation in libc.
+  AC_CACHE_CHECK([whether free is known to preserve errno],
+    [gl_cv_func_free_preserves_errno],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <stdlib.h>
+          ]],
+          [[#if 2 < __GLIBC__ + (33 <= __GLIBC_MINOR__)
+            #elif defined __OpenBSD__
+            #elif defined __sun
+            #else
+              #error "'free' is not known to preserve errno"
+            #endif
+          ]])],
+       [gl_cv_func_free_preserves_errno=yes],
+       [gl_cv_func_free_preserves_errno=no])
+    ])
+
+  case $gl_cv_func_free_preserves_errno in
+   *yes)
+    AC_DEFINE([HAVE_FREE_POSIX], [1],
+      [Define if the 'free' function is guaranteed to preserve errno.])
+    ;;
+   *) REPLACE_FREE=1 ;;
+  esac
+])
+
+# Prerequisites of lib/free.c.
+AC_DEFUN([gl_PREREQ_FREE], [:])
diff --git a/src/grep/m4/fstat.m4 b/src/grep/m4/fstat.m4
new file mode 100644
index 0000000..cdaca80
--- /dev/null
+++ b/src/grep/m4/fstat.m4
@@ -0,0 +1,40 @@
+# fstat.m4 serial 8
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_FSTAT],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
+
+  case "$host_os" in
+    mingw* | solaris*)
+      dnl On MinGW, the original stat() returns st_atime, st_mtime,
+      dnl st_ctime values that are affected by the time zone.
+      dnl Solaris stat can return a negative tv_nsec.
+      REPLACE_FSTAT=1
+      ;;
+  esac
+
+  dnl Replace fstat() for supporting the gnulib-defined open() on directories.
+  m4_ifdef([gl_FUNC_FCHDIR], [
+    gl_TEST_FCHDIR
+    if test $HAVE_FCHDIR = 0; then
+      case "$gl_cv_func_open_directory_works" in
+        *yes) ;;
+        *)
+          REPLACE_FSTAT=1
+          ;;
+      esac
+    fi
+  ])
+])
+
+# Prerequisites of lib/fstat.c and lib/stat-w32.c.
+AC_DEFUN([gl_PREREQ_FSTAT], [
+  AC_REQUIRE([gl_SYS_STAT_H])
+  AC_REQUIRE([gl_PREREQ_STAT_W32])
+  :
+])
diff --git a/src/grep/m4/fstatat.m4 b/src/grep/m4/fstatat.m4
new file mode 100644
index 0000000..d730e46
--- /dev/null
+++ b/src/grep/m4/fstatat.m4
@@ -0,0 +1,65 @@
+# fstatat.m4 serial 4
+dnl Copyright (C) 2004-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# Written by Jim Meyering.
+
+# If we have the fstatat function, and it has the bug (in AIX 7.1)
+# that it does not fill in st_size correctly, use the replacement function.
+AC_DEFUN([gl_FUNC_FSTATAT],
+[
+  AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+  AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CHECK_FUNCS_ONCE([fstatat])
+
+  if test $ac_cv_func_fstatat = no; then
+    HAVE_FSTATAT=0
+  else
+    dnl Test for an AIX 7.1 bug; see
+    dnl <https://lists.gnu.org/r/bug-tar/2011-09/msg00015.html>.
+    AC_CACHE_CHECK([whether fstatat (..., 0) works],
+      [gl_cv_func_fstatat_zero_flag],
+      [AC_RUN_IFELSE(
+         [AC_LANG_SOURCE(
+            [[
+              #include <fcntl.h>
+              #include <sys/stat.h>
+              int
+              main (void)
+              {
+                struct stat a;
+                return fstatat (AT_FDCWD, ".", &a, 0) != 0;
+              }
+            ]])],
+         [gl_cv_func_fstatat_zero_flag=yes],
+         [gl_cv_func_fstatat_zero_flag=no],
+         [case "$host_os" in
+            aix*) gl_cv_func_fstatat_zero_flag="guessing no";;
+            *)    gl_cv_func_fstatat_zero_flag="guessing yes";;
+          esac
+         ])
+      ])
+
+    case $gl_cv_func_fstatat_zero_flag+$gl_cv_func_lstat_dereferences_slashed_symlink in
+    *yes+*yes) ;;
+    *) REPLACE_FSTATAT=1 ;;
+    esac
+
+    case $host_os in
+      solaris*)
+        REPLACE_FSTATAT=1 ;;
+    esac
+
+    case $REPLACE_FSTATAT,$gl_cv_func_fstatat_zero_flag in
+      1,*yes)
+         AC_DEFINE([HAVE_WORKING_FSTATAT_ZERO_FLAG], [1],
+           [Define to 1 if fstatat (..., 0) works.
+            For example, it does not work in AIX 7.1.])
+         ;;
+    esac
+  fi
+])
diff --git a/src/grep/m4/ftruncate.m4 b/src/grep/m4/ftruncate.m4
new file mode 100644
index 0000000..4a3eca6
--- /dev/null
+++ b/src/grep/m4/ftruncate.m4
@@ -0,0 +1,40 @@
+# serial 21
+
+# See if we need to emulate a missing ftruncate function using _chsize.
+
+# Copyright (C) 2000-2001, 2003-2007, 2009-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_FTRUNCATE],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_CHECK_FUNCS_ONCE([ftruncate])
+  if test $ac_cv_func_ftruncate = yes; then
+    m4_ifdef([gl_LARGEFILE], [
+      AC_REQUIRE([AC_CANONICAL_HOST])
+      case "$host_os" in
+        mingw*)
+          dnl Native Windows, and Large File Support is requested.
+          dnl The MSVCRT _chsize() function only accepts a 32-bit file size,
+          dnl and the mingw64 ftruncate64() function is unreliable (it may
+          dnl delete the file, see
+          dnl <https://web.archive.org/web/20160425005423/http://mingw-w64.sourcearchive.com/documentation/2.0-1/ftruncate64_8c_source.html>).
+          dnl Use gnulib's ftruncate() implementation instead.
+          REPLACE_FTRUNCATE=1
+          ;;
+      esac
+    ], [
+      :
+    ])
+  else
+    HAVE_FTRUNCATE=0
+  fi
+])
+
+# Prerequisites of lib/ftruncate.c.
+AC_DEFUN([gl_PREREQ_FTRUNCATE],
+[
+  AC_CHECK_FUNCS([_chsize])
+])
diff --git a/src/grep/m4/fts.m4 b/src/grep/m4/fts.m4
new file mode 100644
index 0000000..44dfaa5
--- /dev/null
+++ b/src/grep/m4/fts.m4
@@ -0,0 +1,49 @@
+#serial 22
+dnl Copyright (C) 2005-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_FTS],
+[
+  gl_FUNC_FTS_CORE
+])
+
+AC_DEFUN([gl_FUNC_FTS_CORE],
+[
+  dnl Prerequisites of lib/fts.c.
+  gl_FUNC_OPENAT
+
+  AC_CHECK_FUNCS_ONCE([fstatfs])
+  AC_CHECK_HEADERS_ONCE([sys/param.h sys/vfs.h])dnl
+  if test "$ac_cv_func_fstatfs,$ac_cv_header_sys_vfs_h" = yes,yes; then
+    AC_CHECK_MEMBERS([struct statfs.f_type], [], [],
+      [[$ac_includes_default
+        #include <sys/vfs.h>
+      ]])
+    if test "$ac_cv_member_struct_statfs_f_type" = yes; then
+      AC_CHECK_TYPES([__fsword_t], [], [],
+        [[$ac_includes_default
+          #include <sys/vfs.h>
+        ]])
+    fi
+  fi
+
+  AC_CHECK_FUNC([fts_open])
+  if test $ac_cv_func_fts_open = yes; then
+    dnl The system already has the symbols fts_open, etc.
+    dnl Avoid conflicts between these symbols and ours at the linker level.
+    AC_DEFINE([fts_open], [rpl_fts_open],
+      [Define to the overridden function name])
+    AC_DEFINE([fts_close], [rpl_fts_close],
+      [Define to the overridden function name])
+    AC_DEFINE([fts_read], [rpl_fts_read],
+      [Define to the overridden function name])
+    AC_DEFINE([fts_set], [rpl_fts_set],
+      [Define to the overridden function name])
+    AC_DEFINE([fts_children], [rpl_fts_children],
+      [Define to the overridden function name])
+    AC_DEFINE([fts_cross_check], [rpl_fts_cross_check],
+      [Define to the overridden function name])
+  fi
+])
diff --git a/src/grep/m4/getcwd.m4 b/src/grep/m4/getcwd.m4
new file mode 100644
index 0000000..6ec7a94
--- /dev/null
+++ b/src/grep/m4/getcwd.m4
@@ -0,0 +1,166 @@
+# getcwd.m4 - check for working getcwd that is compatible with glibc
+
+# Copyright (C) 2001, 2003-2007, 2009-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# Written by Paul Eggert.
+# serial 19
+
+AC_DEFUN([gl_FUNC_GETCWD_NULL],
+  [
+   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+   AC_CHECK_HEADERS_ONCE([unistd.h])
+   AC_CACHE_CHECK([whether getcwd (NULL, 0) allocates memory for result],
+     [gl_cv_func_getcwd_null],
+     [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+#	 include <stdlib.h>
+#        if HAVE_UNISTD_H
+#         include <unistd.h>
+#        else /* on Windows with MSVC */
+#         include <direct.h>
+#        endif
+         ]GL_MDA_DEFINES[
+#        ifndef getcwd
+         char *getcwd ();
+#        endif
+]], [[
+#if defined _WIN32 && ! defined __CYGWIN__
+/* mingw cwd does not start with '/', but _getcwd does allocate.
+   However, mingw fails to honor non-zero size.  */
+#else
+           if (chdir ("/") != 0)
+             return 1;
+           else
+             {
+               char *f = getcwd (NULL, 0);
+               if (! f)
+                 return 2;
+               if (f[0] != '/')
+                 { free (f); return 3; }
+               if (f[1] != '\0')
+                 { free (f); return 4; }
+               free (f);
+               return 0;
+             }
+#endif
+         ]])],
+        [gl_cv_func_getcwd_null=yes],
+        [gl_cv_func_getcwd_null=no],
+        [[case "$host_os" in
+                           # Guess yes on glibc systems.
+            *-gnu* | gnu*) gl_cv_func_getcwd_null="guessing yes";;
+                           # Guess yes on musl systems.
+            *-musl*)       gl_cv_func_getcwd_null="guessing yes";;
+                           # Guess yes on Cygwin.
+            cygwin*)       gl_cv_func_getcwd_null="guessing yes";;
+                           # If we don't know, obey --enable-cross-guesses.
+            *)             gl_cv_func_getcwd_null="$gl_cross_guess_normal";;
+          esac
+        ]])])
+])
+
+AC_DEFUN([gl_FUNC_GETCWD_SIGNATURE],
+[
+  AC_CACHE_CHECK([for getcwd with POSIX signature],
+    [gl_cv_func_getcwd_posix_signature],
+    [AC_COMPILE_IFELSE(
+      [AC_LANG_PROGRAM(
+         [[#include <unistd.h>
+         ]GL_MDA_DEFINES],
+         [[extern
+           #ifdef __cplusplus
+           "C"
+           #endif
+           char *getcwd (char *, size_t);
+         ]])
+      ],
+      [gl_cv_func_getcwd_posix_signature=yes],
+      [gl_cv_func_getcwd_posix_signature=no])
+   ])
+])
+
+dnl Guarantee that getcwd will malloc with a NULL first argument.  Assumes
+dnl that either the system getcwd is robust, or that calling code is okay
+dnl with spurious failures when run from a directory with an absolute name
+dnl larger than 4k bytes.
+dnl
+dnl Assumes that getcwd exists; if you are worried about obsolete
+dnl platforms that lacked getcwd(), then you need to use the GPL module.
+AC_DEFUN([gl_FUNC_GETCWD_LGPL],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_GETCWD_NULL])
+  AC_REQUIRE([gl_FUNC_GETCWD_SIGNATURE])
+
+  case $gl_cv_func_getcwd_null,$gl_cv_func_getcwd_posix_signature in
+  *yes,yes) ;;
+  *)
+    dnl Minimal replacement lib/getcwd-lgpl.c.
+    REPLACE_GETCWD=1
+    ;;
+  esac
+])
+
+dnl Check for all known getcwd bugs; useful for a program likely to be
+dnl executed from an arbitrary location.
+AC_DEFUN([gl_FUNC_GETCWD],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_GETCWD_NULL])
+  AC_REQUIRE([gl_FUNC_GETCWD_SIGNATURE])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+  gl_abort_bug=no
+  case "$host_os" in
+    mingw*)
+      gl_cv_func_getcwd_path_max=yes
+      ;;
+    *)
+      gl_FUNC_GETCWD_PATH_MAX
+      case "$gl_cv_func_getcwd_null" in
+        *yes)
+          gl_FUNC_GETCWD_ABORT_BUG([gl_abort_bug=yes])
+          ;;
+      esac
+      ;;
+  esac
+  dnl Define HAVE_MINIMALLY_WORKING_GETCWD and HAVE_PARTLY_WORKING_GETCWD
+  dnl if appropriate.
+  case "$gl_cv_func_getcwd_path_max" in
+    *"no" | *"no, it has the AIX bug") ;;
+    *)
+      AC_DEFINE([HAVE_MINIMALLY_WORKING_GETCWD], [1],
+        [Define to 1 if getcwd minimally works, that is, its result can be
+         trusted when it succeeds.])
+      ;;
+  esac
+  case "$gl_cv_func_getcwd_path_max" in
+    *"no, but it is partly working")
+      AC_DEFINE([HAVE_PARTLY_WORKING_GETCWD], [1],
+        [Define to 1 if getcwd works, except it sometimes fails when it
+         shouldn't, setting errno to ERANGE, ENAMETOOLONG, or ENOENT.])
+      ;;
+    *"yes, but with shorter paths")
+      AC_DEFINE([HAVE_GETCWD_SHORTER], [1],
+        [Define to 1 if getcwd works, but with shorter paths
+         than is generally tested with the replacement.])
+      ;;
+  esac
+
+  if { case "$gl_cv_func_getcwd_null" in *yes) false;; *) true;; esac; } \
+     || test $gl_cv_func_getcwd_posix_signature != yes \
+     || { case "$gl_cv_func_getcwd_path_max" in *yes*) false;; *) true;; esac; } \
+     || test $gl_abort_bug = yes; then
+    REPLACE_GETCWD=1
+  fi
+])
+
+# Prerequisites of lib/getcwd.c, when full replacement is in effect.
+AC_DEFUN([gl_PREREQ_GETCWD],
+[
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+  AC_REQUIRE([gl_CHECK_TYPE_STRUCT_DIRENT_D_INO])
+  :
+])
diff --git a/src/grep/m4/getdtablesize.m4 b/src/grep/m4/getdtablesize.m4
new file mode 100644
index 0000000..8fbc941
--- /dev/null
+++ b/src/grep/m4/getdtablesize.m4
@@ -0,0 +1,63 @@
+# getdtablesize.m4 serial 8
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_GETDTABLESIZE],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CHECK_FUNCS_ONCE([getdtablesize])
+  AC_CHECK_DECLS_ONCE([getdtablesize])
+  if test $ac_cv_func_getdtablesize = yes &&
+     test $ac_cv_have_decl_getdtablesize = yes; then
+    AC_CACHE_CHECK([whether getdtablesize works],
+      [gl_cv_func_getdtablesize_works],
+      [dnl There are two concepts: the "maximum possible file descriptor value + 1"
+       dnl and the "maximum number of open file descriptors in a process".
+       dnl Per SUSv2 and POSIX, getdtablesize() should return the first one.
+       dnl On most platforms, the first and the second concept are the same.
+       dnl On OpenVMS, however, they are different and getdtablesize() returns
+       dnl the second one; thus the test below fails. But we don't care
+       dnl because there's no good way to write a replacement getdtablesize().
+       case "$host_os" in
+         vms*) gl_cv_func_getdtablesize_works="no (limitation)" ;;
+         *)
+           dnl Cygwin 1.7.25 automatically increases the RLIMIT_NOFILE soft
+           dnl limit up to an unchangeable hard limit; all other platforms
+           dnl correctly require setrlimit before getdtablesize() can report
+           dnl a larger value.
+           AC_RUN_IFELSE([
+             AC_LANG_PROGRAM(
+               [[#include <unistd.h>]
+                GL_MDA_DEFINES
+               ],
+               [[int size = getdtablesize();
+                 if (dup2 (0, getdtablesize()) != -1)
+                   return 1;
+                 if (size != getdtablesize())
+                   return 2;
+               ]])],
+             [gl_cv_func_getdtablesize_works=yes],
+             [gl_cv_func_getdtablesize_works=no],
+             [case "$host_os" in
+                cygwin*) # on cygwin 1.5.25, getdtablesize() automatically grows
+                  gl_cv_func_getdtablesize_works="guessing no" ;;
+                *) gl_cv_func_getdtablesize_works="guessing yes" ;;
+              esac
+             ])
+           ;;
+       esac
+      ])
+    case "$gl_cv_func_getdtablesize_works" in
+      *yes | "no (limitation)") ;;
+      *) REPLACE_GETDTABLESIZE=1 ;;
+    esac
+  else
+    HAVE_GETDTABLESIZE=0
+  fi
+])
+
+# Prerequisites of lib/getdtablesize.c.
+AC_DEFUN([gl_PREREQ_GETDTABLESIZE], [:])
diff --git a/src/grep/m4/getopt.m4 b/src/grep/m4/getopt.m4
new file mode 100644
index 0000000..bb95c5e
--- /dev/null
+++ b/src/grep/m4/getopt.m4
@@ -0,0 +1,381 @@
+# getopt.m4 serial 47
+dnl Copyright (C) 2002-2006, 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# Request a POSIX compliant getopt function.
+AC_DEFUN([gl_FUNC_GETOPT_POSIX],
+[
+  m4_divert_text([DEFAULTS], [gl_getopt_required=POSIX])
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])
+  dnl Other modules can request the gnulib implementation of the getopt
+  dnl functions unconditionally, by defining gl_REPLACE_GETOPT_ALWAYS.
+  dnl argp.m4 does this.
+  m4_ifdef([gl_REPLACE_GETOPT_ALWAYS], [
+    REPLACE_GETOPT=1
+  ], [
+    REPLACE_GETOPT=0
+    if test -n "$gl_replace_getopt"; then
+      REPLACE_GETOPT=1
+    fi
+  ])
+  if test $REPLACE_GETOPT = 1; then
+    dnl Arrange for getopt.h to be created.
+    gl_GETOPT_SUBSTITUTE_HEADER
+  fi
+])
+
+# Request a POSIX compliant getopt function with GNU extensions (such as
+# options with optional arguments) and the functions getopt_long,
+# getopt_long_only.
+AC_DEFUN([gl_FUNC_GETOPT_GNU],
+[
+  dnl Set the variable gl_getopt_required, so that all invocations of
+  dnl gl_GETOPT_CHECK_HEADERS in the scope of the current configure file
+  dnl will check for getopt with GNU extensions.
+  dnl This means that if one gnulib-tool invocation requests getopt-posix
+  dnl and another gnulib-tool invocation requests getopt-gnu, it is as if
+  dnl both had requested getopt-gnu.
+  m4_divert_text([INIT_PREPARE], [gl_getopt_required=GNU])
+
+  dnl No need to invoke gl_FUNC_GETOPT_POSIX here; this is automatically
+  dnl done through the module dependency getopt-gnu -> getopt-posix.
+])
+
+# Determine whether to replace the entire getopt facility.
+AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_REQUIRE([AC_PROG_AWK]) dnl for awk that supports ENVIRON
+
+  dnl Persuade Solaris <unistd.h> to declare optarg, optind, opterr, optopt.
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  gl_CHECK_NEXT_HEADERS([getopt.h])
+  if test $ac_cv_header_getopt_h = yes; then
+    HAVE_GETOPT_H=1
+  else
+    HAVE_GETOPT_H=0
+  fi
+  AC_SUBST([HAVE_GETOPT_H])
+
+  gl_replace_getopt=
+
+  dnl Test whether <getopt.h> is available.
+  if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
+    AC_CHECK_HEADERS([getopt.h], [], [gl_replace_getopt=yes])
+  fi
+
+  dnl Test whether the function getopt_long is available.
+  if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
+    AC_CHECK_FUNCS([getopt_long_only], [], [gl_replace_getopt=yes])
+  fi
+
+  dnl POSIX 2008 does not specify leading '+' behavior, but see
+  dnl http://austingroupbugs.net/view.php?id=191 for a recommendation on
+  dnl the next version of POSIX.  For now, we only guarantee leading '+'
+  dnl behavior with getopt-gnu.
+  if test -z "$gl_replace_getopt"; then
+    AC_CACHE_CHECK([whether getopt is POSIX compatible],
+      [gl_cv_func_getopt_posix],
+      [
+        dnl Merging these three different test programs into a single one
+        dnl would require a reset mechanism. On BSD systems, it can be done
+        dnl through 'optreset'; on some others (glibc), it can be done by
+        dnl setting 'optind' to 0; on others again (HP-UX, IRIX, OSF/1,
+        dnl Solaris 9, musl libc), there is no such mechanism.
+        if test $cross_compiling = no; then
+          dnl Sanity check. Succeeds everywhere (except on MSVC,
+          dnl which lacks <unistd.h> and getopt() entirely).
+          AC_RUN_IFELSE(
+            [AC_LANG_SOURCE([[
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+int
+main ()
+{
+  static char program[] = "program";
+  static char a[] = "-a";
+  static char foo[] = "foo";
+  static char bar[] = "bar";
+  char *argv[] = { program, a, foo, bar, NULL };
+  int c;
+
+  c = getopt (4, argv, "ab");
+  if (!(c == 'a'))
+    return 1;
+  c = getopt (4, argv, "ab");
+  if (!(c == -1))
+    return 2;
+  if (!(optind == 2))
+    return 3;
+  return 0;
+}
+]])],
+            [gl_cv_func_getopt_posix=maybe],
+            [gl_cv_func_getopt_posix=no])
+          if test $gl_cv_func_getopt_posix = maybe; then
+            dnl Sanity check with '+'. Succeeds everywhere (except on MSVC,
+            dnl which lacks <unistd.h> and getopt() entirely).
+            AC_RUN_IFELSE(
+              [AC_LANG_SOURCE([[
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+int
+main ()
+{
+  static char program[] = "program";
+  static char donald[] = "donald";
+  static char p[] = "-p";
+  static char billy[] = "billy";
+  static char duck[] = "duck";
+  static char a[] = "-a";
+  static char bar[] = "bar";
+  char *argv[] = { program, donald, p, billy, duck, a, bar, NULL };
+  int c;
+
+  c = getopt (7, argv, "+abp:q:");
+  if (!(c == -1))
+    return 4;
+  if (!(strcmp (argv[0], "program") == 0))
+    return 5;
+  if (!(strcmp (argv[1], "donald") == 0))
+    return 6;
+  if (!(strcmp (argv[2], "-p") == 0))
+    return 7;
+  if (!(strcmp (argv[3], "billy") == 0))
+    return 8;
+  if (!(strcmp (argv[4], "duck") == 0))
+    return 9;
+  if (!(strcmp (argv[5], "-a") == 0))
+    return 10;
+  if (!(strcmp (argv[6], "bar") == 0))
+    return 11;
+  if (!(optind == 1))
+    return 12;
+  return 0;
+}
+]])],
+              [gl_cv_func_getopt_posix=maybe],
+              [gl_cv_func_getopt_posix=no])
+          fi
+          if test $gl_cv_func_getopt_posix = maybe; then
+            dnl Detect Mac OS X 10.5, AIX 7.1, mingw bug.
+            AC_RUN_IFELSE(
+              [AC_LANG_SOURCE([[
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+int
+main ()
+{
+  static char program[] = "program";
+  static char ab[] = "-ab";
+  char *argv[3] = { program, ab, NULL };
+  if (getopt (2, argv, "ab:") != 'a')
+    return 13;
+  if (getopt (2, argv, "ab:") != '?')
+    return 14;
+  if (optopt != 'b')
+    return 15;
+  if (optind != 2)
+    return 16;
+  return 0;
+}
+]])],
+              [gl_cv_func_getopt_posix=yes],
+              [gl_cv_func_getopt_posix=no])
+          fi
+        else
+          case "$host_os" in
+            darwin* | aix* | mingw*) gl_cv_func_getopt_posix="guessing no";;
+            *)                       gl_cv_func_getopt_posix="guessing yes";;
+          esac
+        fi
+      ])
+    case "$gl_cv_func_getopt_posix" in
+      *no) gl_replace_getopt=yes ;;
+    esac
+  fi
+
+  if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
+    AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_getopt_gnu],
+      [# Even with POSIXLY_CORRECT, the GNU extension of leading '-' in the
+       # optstring is necessary for programs like m4 that have POSIX-mandated
+       # semantics for supporting options interspersed with files.
+       # Also, since getopt_long is a GNU extension, we require optind=0.
+       # Bash ties 'set -o posix' to a non-exported POSIXLY_CORRECT;
+       # so take care to revert to the correct (non-)export state.
+dnl GNU Coding Standards currently allow awk but not env; besides, env
+dnl is ambiguous with environment values that contain newlines.
+       gl_awk_probe='BEGIN { if ("POSIXLY_CORRECT" in ENVIRON) print "x" }'
+       case ${POSIXLY_CORRECT+x}`$AWK "$gl_awk_probe" </dev/null` in
+         xx) gl_had_POSIXLY_CORRECT=exported ;;
+         x)  gl_had_POSIXLY_CORRECT=yes      ;;
+         *)  gl_had_POSIXLY_CORRECT=         ;;
+       esac
+       POSIXLY_CORRECT=1
+       export POSIXLY_CORRECT
+       AC_RUN_IFELSE(
+        [AC_LANG_PROGRAM([[#include <getopt.h>
+                           #include <stddef.h>
+                           #include <string.h>
+           ]GL_NOCRASH[
+           ]], [[
+             int result = 0;
+
+             nocrash_init();
+
+             /* This code succeeds on glibc 2.8, OpenBSD 4.0, Cygwin, mingw,
+                and fails on Mac OS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5,
+                OSF/1 5.1, Solaris 10.  */
+             {
+               static char conftest[] = "conftest";
+               static char plus[] = "-+";
+               char *argv[3] = { conftest, plus, NULL };
+               opterr = 0;
+               if (getopt (2, argv, "+a") != '?')
+                 result |= 1;
+             }
+             /* This code succeeds on glibc 2.8, mingw,
+                and fails on Mac OS X 10.5, OpenBSD 4.0, AIX 5.2, HP-UX 11,
+                IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x.  */
+             {
+               static char program[] = "program";
+               static char p[] = "-p";
+               static char foo[] = "foo";
+               static char bar[] = "bar";
+               char *argv[] = { program, p, foo, bar, NULL };
+
+               optind = 1;
+               if (getopt (4, argv, "p::") != 'p')
+                 result |= 2;
+               else if (optarg != NULL)
+                 result |= 4;
+               else if (getopt (4, argv, "p::") != -1)
+                 result |= 6;
+               else if (optind != 2)
+                 result |= 8;
+             }
+             /* This code succeeds on glibc 2.8 and fails on Cygwin 1.7.0.  */
+             {
+               static char program[] = "program";
+               static char foo[] = "foo";
+               static char p[] = "-p";
+               char *argv[] = { program, foo, p, NULL };
+               optind = 0;
+               if (getopt (3, argv, "-p") != 1)
+                 result |= 16;
+               else if (getopt (3, argv, "-p") != 'p')
+                 result |= 16;
+             }
+             /* This code fails on glibc 2.11.  */
+             {
+               static char program[] = "program";
+               static char b[] = "-b";
+               static char a[] = "-a";
+               char *argv[] = { program, b, a, NULL };
+               optind = opterr = 0;
+               if (getopt (3, argv, "+:a:b") != 'b')
+                 result |= 32;
+               else if (getopt (3, argv, "+:a:b") != ':')
+                 result |= 32;
+             }
+             /* This code dumps core on glibc 2.14.  */
+             {
+               static char program[] = "program";
+               static char w[] = "-W";
+               static char dummy[] = "dummy";
+               char *argv[] = { program, w, dummy, NULL };
+               optind = opterr = 1;
+               if (getopt (3, argv, "W;") != 'W')
+                 result |= 64;
+             }
+             return result;
+           ]])],
+        [gl_cv_func_getopt_gnu=yes],
+        [gl_cv_func_getopt_gnu=no],
+        [dnl Cross compiling.
+         dnl Assume the worst, even on glibc platforms.
+         dnl But obey --enable-cross-guesses.
+         gl_cv_func_getopt_gnu="$gl_cross_guess_normal"
+        ])
+       case $gl_had_POSIXLY_CORRECT in
+         exported) ;;
+         yes) AS_UNSET([POSIXLY_CORRECT]); POSIXLY_CORRECT=1 ;;
+         *) AS_UNSET([POSIXLY_CORRECT]) ;;
+       esac
+      ])
+    if test "$gl_cv_func_getopt_gnu" != yes; then
+      gl_replace_getopt=yes
+    else
+      AC_CACHE_CHECK([for working GNU getopt_long function],
+        [gl_cv_func_getopt_long_gnu],
+        [AC_RUN_IFELSE(
+           [AC_LANG_PROGRAM(
+              [[#include <getopt.h>
+                #include <stddef.h>
+                #include <string.h>
+              ]],
+              [[static const struct option long_options[] =
+                  {
+                    { "xtremely-",no_argument,       NULL, 1003 },
+                    { "xtra",     no_argument,       NULL, 1001 },
+                    { "xtreme",   no_argument,       NULL, 1002 },
+                    { "xtremely", no_argument,       NULL, 1003 },
+                    { NULL,       0,                 NULL, 0 }
+                  };
+                /* This code fails on OpenBSD 5.0.  */
+                {
+                  static char program[] = "program";
+                  static char xtremel[] = "--xtremel";
+                  char *argv[] = { program, xtremel, NULL };
+                  int option_index;
+                  optind = 1; opterr = 0;
+                  if (getopt_long (2, argv, "", long_options, &option_index) != 1003)
+                    return 1;
+                }
+                return 0;
+              ]])],
+           [gl_cv_func_getopt_long_gnu=yes],
+           [gl_cv_func_getopt_long_gnu=no],
+           [dnl Cross compiling. Guess no on OpenBSD, yes otherwise.
+            case "$host_os" in
+              openbsd*) gl_cv_func_getopt_long_gnu="guessing no";;
+              *)        gl_cv_func_getopt_long_gnu="guessing yes";;
+            esac
+           ])
+        ])
+      case "$gl_cv_func_getopt_long_gnu" in
+        *yes) ;;
+        *) gl_replace_getopt=yes ;;
+      esac
+    fi
+  fi
+])
+
+AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
+[
+  AC_CHECK_HEADERS_ONCE([sys/cdefs.h])
+  if test $ac_cv_header_sys_cdefs_h = yes; then
+    HAVE_SYS_CDEFS_H=1
+  else
+    HAVE_SYS_CDEFS_H=0
+  fi
+  AC_SUBST([HAVE_SYS_CDEFS_H])
+
+  AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
+    [Define to rpl_ if the getopt replacement functions and variables
+     should be used.])
+  GETOPT_H=getopt.h
+  GETOPT_CDEFS_H=getopt-cdefs.h
+  AC_SUBST([GETOPT_H])
+  AC_SUBST([GETOPT_CDEFS_H])
+])
diff --git a/src/grep/m4/getpagesize.m4 b/src/grep/m4/getpagesize.m4
new file mode 100644
index 0000000..7e61801
--- /dev/null
+++ b/src/grep/m4/getpagesize.m4
@@ -0,0 +1,49 @@
+# getpagesize.m4 serial 10
+dnl Copyright (C) 2002, 2004-2005, 2007, 2009-2021 Free Software Foundation,
+dnl Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_GETPAGESIZE],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  gl_CHECK_FUNC_GETPAGESIZE
+  if test $gl_cv_func_getpagesize = no; then
+    HAVE_GETPAGESIZE=0
+    AC_CHECK_HEADERS([OS.h])
+    if test $ac_cv_header_OS_h = yes; then
+      HAVE_OS_H=1
+    fi
+    AC_CHECK_HEADERS([sys/param.h])
+    if test $ac_cv_header_sys_param_h = yes; then
+      HAVE_SYS_PARAM_H=1
+    fi
+  fi
+  case "$host_os" in
+    mingw*)
+      REPLACE_GETPAGESIZE=1
+      ;;
+  esac
+  dnl Also check whether it's declared.
+  dnl mingw has getpagesize() in libgcc.a but doesn't declare it.
+  AC_CHECK_DECL([getpagesize], , [HAVE_DECL_GETPAGESIZE=0])
+])
+
+dnl Tests whether the function getpagesize() exists.
+dnl Sets gl_cv_func_getpagesize.
+AC_DEFUN([gl_CHECK_FUNC_GETPAGESIZE],
+[
+  dnl We can't use AC_CHECK_FUNC here, because getpagesize() is defined as a
+  dnl static inline function when compiling for Android 4.4 or older.
+  AC_CACHE_CHECK([for getpagesize], [gl_cv_func_getpagesize],
+    [AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <unistd.h>]],
+          [[return getpagesize();]])
+       ],
+       [gl_cv_func_getpagesize=yes],
+       [gl_cv_func_getpagesize=no])
+    ])
+])
diff --git a/src/grep/m4/getprogname.m4 b/src/grep/m4/getprogname.m4
new file mode 100644
index 0000000..65917d6
--- /dev/null
+++ b/src/grep/m4/getprogname.m4
@@ -0,0 +1,43 @@
+# getprogname.m4 - check for getprogname or replacements for it
+
+# Copyright (C) 2016-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# serial 4
+
+AC_DEFUN([gl_FUNC_GETPROGNAME],
+[
+  AC_CHECK_FUNCS_ONCE([getprogname getexecname])
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+  ac_found=0
+  AC_CHECK_DECLS([program_invocation_name], [ac_found=1], [],
+    [#include <errno.h>])
+  AC_CHECK_DECLS([program_invocation_short_name], [ac_found=1], [],
+    [#include <errno.h>])
+  AC_CHECK_DECLS([__argv], [ac_found=1], [], [#include <stdlib.h>])
+
+  # Incur the cost of this test only if none of the above worked.
+  if test $ac_found = 0; then
+    # On OpenBSD 5.1, using the global __progname variable appears to be
+    # the only way to implement getprogname.
+    AC_CACHE_CHECK([whether __progname is defined in default libraries],
+      [gl_cv_var___progname],
+      [
+        gl_cv_var___progname=
+        AC_LINK_IFELSE(
+          [AC_LANG_PROGRAM(
+            [[extern char *__progname;]],
+            [[return *__progname;]]
+          )],
+          [gl_cv_var___progname=yes]
+        )
+      ]
+    )
+    if test "$gl_cv_var___progname" = yes; then
+      AC_DEFINE([HAVE_VAR___PROGNAME], 1,
+        [Define if you have a global __progname variable])
+    fi
+  fi
+])
diff --git a/src/grep/m4/gettext.m4 b/src/grep/m4/gettext.m4
new file mode 100644
index 0000000..8d1f066
--- /dev/null
+++ b/src/grep/m4/gettext.m4
@@ -0,0 +1,401 @@
+# gettext.m4 serial 66 (gettext-0.18.2)
+dnl Copyright (C) 1995-2013 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+dnl
+dnl This file can can be used in projects which are not available under
+dnl the GNU General Public License or the GNU Library General Public
+dnl License but which still want to provide support for the GNU gettext
+dnl functionality.
+dnl Please note that the actual code of the GNU gettext library is covered
+dnl by the GNU Library General Public License, and the rest of the GNU
+dnl gettext package package is covered by the GNU General Public License.
+dnl They are *not* in the public domain.
+
+dnl Authors:
+dnl   Ulrich Drepper <drepper@cygnus.com>, 1995-2000.
+dnl   Bruno Haible <haible@clisp.cons.org>, 2000-2006, 2008-2010.
+
+dnl Macro to add for using GNU gettext.
+
+dnl Usage: AM_GNU_GETTEXT([INTLSYMBOL], [NEEDSYMBOL], [INTLDIR]).
+dnl INTLSYMBOL can be one of 'external', 'no-libtool', 'use-libtool'. The
+dnl    default (if it is not specified or empty) is 'no-libtool'.
+dnl    INTLSYMBOL should be 'external' for packages with no intl directory,
+dnl    and 'no-libtool' or 'use-libtool' for packages with an intl directory.
+dnl    If INTLSYMBOL is 'use-libtool', then a libtool library
+dnl    $(top_builddir)/intl/libintl.la will be created (shared and/or static,
+dnl    depending on --{enable,disable}-{shared,static} and on the presence of
+dnl    AM-DISABLE-SHARED). If INTLSYMBOL is 'no-libtool', a static library
+dnl    $(top_builddir)/intl/libintl.a will be created.
+dnl If NEEDSYMBOL is specified and is 'need-ngettext', then GNU gettext
+dnl    implementations (in libc or libintl) without the ngettext() function
+dnl    will be ignored.  If NEEDSYMBOL is specified and is
+dnl    'need-formatstring-macros', then GNU gettext implementations that don't
+dnl    support the ISO C 99 <inttypes.h> formatstring macros will be ignored.
+dnl INTLDIR is used to find the intl libraries.  If empty,
+dnl    the value '$(top_builddir)/intl/' is used.
+dnl
+dnl The result of the configuration is one of three cases:
+dnl 1) GNU gettext, as included in the intl subdirectory, will be compiled
+dnl    and used.
+dnl    Catalog format: GNU --> install in $(datadir)
+dnl    Catalog extension: .mo after installation, .gmo in source tree
+dnl 2) GNU gettext has been found in the system's C library.
+dnl    Catalog format: GNU --> install in $(datadir)
+dnl    Catalog extension: .mo after installation, .gmo in source tree
+dnl 3) No internationalization, always use English msgid.
+dnl    Catalog format: none
+dnl    Catalog extension: none
+dnl If INTLSYMBOL is 'external', only cases 2 and 3 can occur.
+dnl The use of .gmo is historical (it was needed to avoid overwriting the
+dnl GNU format catalogs when building on a platform with an X/Open gettext),
+dnl but we keep it in order not to force irrelevant filename changes on the
+dnl maintainers.
+dnl
+AC_DEFUN([AM_GNU_GETTEXT],
+[
+  dnl Argument checking.
+  ifelse([$1], [], , [ifelse([$1], [external], , [ifelse([$1], [no-libtool], , [ifelse([$1], [use-libtool], ,
+    [errprint([ERROR: invalid first argument to AM_GNU_GETTEXT
+])])])])])
+  ifelse(ifelse([$1], [], [old])[]ifelse([$1], [no-libtool], [old]), [old],
+    [AC_DIAGNOSE([obsolete], [Use of AM_GNU_GETTEXT without [external] argument is deprecated.])])
+  ifelse([$2], [], , [ifelse([$2], [need-ngettext], , [ifelse([$2], [need-formatstring-macros], ,
+    [errprint([ERROR: invalid second argument to AM_GNU_GETTEXT
+])])])])
+  define([gt_included_intl],
+    ifelse([$1], [external],
+      ifdef([AM_GNU_GETTEXT_][INTL_SUBDIR], [yes], [no]),
+      [yes]))
+  define([gt_libtool_suffix_prefix], ifelse([$1], [use-libtool], [l], []))
+  gt_NEEDS_INIT
+  AM_GNU_GETTEXT_NEED([$2])
+
+  AC_REQUIRE([AM_PO_SUBDIRS])dnl
+  ifelse(gt_included_intl, yes, [
+    AC_REQUIRE([AM_INTL_SUBDIR])dnl
+  ])
+
+  dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
+  AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
+  AC_REQUIRE([AC_LIB_RPATH])
+
+  dnl Sometimes libintl requires libiconv, so first search for libiconv.
+  dnl Ideally we would do this search only after the
+  dnl      if test "$USE_NLS" = "yes"; then
+  dnl        if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "yes"; }; then
+  dnl tests. But if configure.in invokes AM_ICONV after AM_GNU_GETTEXT
+  dnl the configure script would need to contain the same shell code
+  dnl again, outside any 'if'. There are two solutions:
+  dnl - Invoke AM_ICONV_LINKFLAGS_BODY here, outside any 'if'.
+  dnl - Control the expansions in more detail using AC_PROVIDE_IFELSE.
+  dnl Since AC_PROVIDE_IFELSE is only in autoconf >= 2.52 and not
+  dnl documented, we avoid it.
+  ifelse(gt_included_intl, yes, , [
+    AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
+  ])
+
+  dnl Sometimes, on Mac OS X, libintl requires linking with CoreFoundation.
+  gt_INTL_MACOSX
+
+  dnl Set USE_NLS.
+  AC_REQUIRE([AM_NLS])
+
+  ifelse(gt_included_intl, yes, [
+    BUILD_INCLUDED_LIBINTL=no
+    USE_INCLUDED_LIBINTL=no
+  ])
+  LIBINTL=
+  LTLIBINTL=
+  POSUB=
+
+  dnl Add a version number to the cache macros.
+  case " $gt_needs " in
+    *" need-formatstring-macros "*) gt_api_version=3 ;;
+    *" need-ngettext "*) gt_api_version=2 ;;
+    *) gt_api_version=1 ;;
+  esac
+  gt_func_gnugettext_libc="gt_cv_func_gnugettext${gt_api_version}_libc"
+  gt_func_gnugettext_libintl="gt_cv_func_gnugettext${gt_api_version}_libintl"
+
+  dnl If we use NLS figure out what method
+  if test "$USE_NLS" = "yes"; then
+    gt_use_preinstalled_gnugettext=no
+    ifelse(gt_included_intl, yes, [
+      AC_MSG_CHECKING([whether included gettext is requested])
+      AC_ARG_WITH([included-gettext],
+        [  --with-included-gettext use the GNU gettext library included here],
+        nls_cv_force_use_gnu_gettext=$withval,
+        nls_cv_force_use_gnu_gettext=no)
+      AC_MSG_RESULT([$nls_cv_force_use_gnu_gettext])
+
+      nls_cv_use_gnu_gettext="$nls_cv_force_use_gnu_gettext"
+      if test "$nls_cv_force_use_gnu_gettext" != "yes"; then
+    ])
+        dnl User does not insist on using GNU NLS library.  Figure out what
+        dnl to use.  If GNU gettext is available we use this.  Else we have
+        dnl to fall back to GNU NLS library.
+
+        if test $gt_api_version -ge 3; then
+          gt_revision_test_code='
+#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
+#define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
+#endif
+changequote(,)dnl
+typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
+changequote([,])dnl
+'
+        else
+          gt_revision_test_code=
+        fi
+        if test $gt_api_version -ge 2; then
+          gt_expression_test_code=' + * ngettext ("", "", 0)'
+        else
+          gt_expression_test_code=
+        fi
+
+        AC_CACHE_CHECK([for GNU gettext in libc], [$gt_func_gnugettext_libc],
+         [AC_LINK_IFELSE(
+            [AC_LANG_PROGRAM(
+               [[
+#include <libintl.h>
+$gt_revision_test_code
+extern int _nl_msg_cat_cntr;
+extern int *_nl_domain_bindings;
+               ]],
+               [[
+bindtextdomain ("", "");
+return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_domain_bindings
+               ]])],
+            [eval "$gt_func_gnugettext_libc=yes"],
+            [eval "$gt_func_gnugettext_libc=no"])])
+
+        if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "yes"; }; then
+          dnl Sometimes libintl requires libiconv, so first search for libiconv.
+          ifelse(gt_included_intl, yes, , [
+            AM_ICONV_LINK
+          ])
+          dnl Search for libintl and define LIBINTL, LTLIBINTL and INCINTL
+          dnl accordingly. Don't use AC_LIB_LINKFLAGS_BODY([intl],[iconv])
+          dnl because that would add "-liconv" to LIBINTL and LTLIBINTL
+          dnl even if libiconv doesn't exist.
+          AC_LIB_LINKFLAGS_BODY([intl])
+          AC_CACHE_CHECK([for GNU gettext in libintl],
+            [$gt_func_gnugettext_libintl],
+           [gt_save_CPPFLAGS="$CPPFLAGS"
+            CPPFLAGS="$CPPFLAGS $INCINTL"
+            gt_save_LIBS="$LIBS"
+            LIBS="$LIBS $LIBINTL"
+            dnl Now see whether libintl exists and does not depend on libiconv.
+            AC_LINK_IFELSE(
+              [AC_LANG_PROGRAM(
+                 [[
+#include <libintl.h>
+$gt_revision_test_code
+extern int _nl_msg_cat_cntr;
+extern
+#ifdef __cplusplus
+"C"
+#endif
+const char *_nl_expand_alias (const char *);
+                 ]],
+                 [[
+bindtextdomain ("", "");
+return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_alias ("")
+                 ]])],
+              [eval "$gt_func_gnugettext_libintl=yes"],
+              [eval "$gt_func_gnugettext_libintl=no"])
+            dnl Now see whether libintl exists and depends on libiconv.
+            if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" != yes; } && test -n "$LIBICONV"; then
+              LIBS="$LIBS $LIBICONV"
+              AC_LINK_IFELSE(
+                [AC_LANG_PROGRAM(
+                   [[
+#include <libintl.h>
+$gt_revision_test_code
+extern int _nl_msg_cat_cntr;
+extern
+#ifdef __cplusplus
+"C"
+#endif
+const char *_nl_expand_alias (const char *);
+                   ]],
+                   [[
+bindtextdomain ("", "");
+return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_alias ("")
+                   ]])],
+                [LIBINTL="$LIBINTL $LIBICONV"
+                 LTLIBINTL="$LTLIBINTL $LTLIBICONV"
+                 eval "$gt_func_gnugettext_libintl=yes"
+                ])
+            fi
+            CPPFLAGS="$gt_save_CPPFLAGS"
+            LIBS="$gt_save_LIBS"])
+        fi
+
+        dnl If an already present or preinstalled GNU gettext() is found,
+        dnl use it.  But if this macro is used in GNU gettext, and GNU
+        dnl gettext is already preinstalled in libintl, we update this
+        dnl libintl.  (Cf. the install rule in intl/Makefile.in.)
+        if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" = "yes"; } \
+           || { { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; } \
+                && test "$PACKAGE" != gettext-runtime \
+                && test "$PACKAGE" != gettext-tools; }; then
+          gt_use_preinstalled_gnugettext=yes
+        else
+          dnl Reset the values set by searching for libintl.
+          LIBINTL=
+          LTLIBINTL=
+          INCINTL=
+        fi
+
+    ifelse(gt_included_intl, yes, [
+        if test "$gt_use_preinstalled_gnugettext" != "yes"; then
+          dnl GNU gettext is not found in the C library.
+          dnl Fall back on included GNU gettext library.
+          nls_cv_use_gnu_gettext=yes
+        fi
+      fi
+
+      if test "$nls_cv_use_gnu_gettext" = "yes"; then
+        dnl Mark actions used to generate GNU NLS library.
+        BUILD_INCLUDED_LIBINTL=yes
+        USE_INCLUDED_LIBINTL=yes
+        LIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LIBICONV $LIBTHREAD"
+        LTLIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LTLIBICONV $LTLIBTHREAD"
+        LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
+      fi
+
+      CATOBJEXT=
+      if test "$gt_use_preinstalled_gnugettext" = "yes" \
+         || test "$nls_cv_use_gnu_gettext" = "yes"; then
+        dnl Mark actions to use GNU gettext tools.
+        CATOBJEXT=.gmo
+      fi
+    ])
+
+    if test -n "$INTL_MACOSX_LIBS"; then
+      if test "$gt_use_preinstalled_gnugettext" = "yes" \
+         || test "$nls_cv_use_gnu_gettext" = "yes"; then
+        dnl Some extra flags are needed during linking.
+        LIBINTL="$LIBINTL $INTL_MACOSX_LIBS"
+        LTLIBINTL="$LTLIBINTL $INTL_MACOSX_LIBS"
+      fi
+    fi
+
+    if test "$gt_use_preinstalled_gnugettext" = "yes" \
+       || test "$nls_cv_use_gnu_gettext" = "yes"; then
+      AC_DEFINE([ENABLE_NLS], [1],
+        [Define to 1 if translation of program messages to the user's native language
+   is requested.])
+    else
+      USE_NLS=no
+    fi
+  fi
+
+  AC_MSG_CHECKING([whether to use NLS])
+  AC_MSG_RESULT([$USE_NLS])
+  if test "$USE_NLS" = "yes"; then
+    AC_MSG_CHECKING([where the gettext function comes from])
+    if test "$gt_use_preinstalled_gnugettext" = "yes"; then
+      if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
+        gt_source="external libintl"
+      else
+        gt_source="libc"
+      fi
+    else
+      gt_source="included intl directory"
+    fi
+    AC_MSG_RESULT([$gt_source])
+  fi
+
+  if test "$USE_NLS" = "yes"; then
+
+    if test "$gt_use_preinstalled_gnugettext" = "yes"; then
+      if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
+        AC_MSG_CHECKING([how to link with libintl])
+        AC_MSG_RESULT([$LIBINTL])
+        AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCINTL])
+      fi
+
+      dnl For backward compatibility. Some packages may be using this.
+      AC_DEFINE([HAVE_GETTEXT], [1],
+       [Define if the GNU gettext() function is already present or preinstalled.])
+      AC_DEFINE([HAVE_DCGETTEXT], [1],
+       [Define if the GNU dcgettext() function is already present or preinstalled.])
+    fi
+
+    dnl We need to process the po/ directory.
+    POSUB=po
+  fi
+
+  ifelse(gt_included_intl, yes, [
+    dnl If this is used in GNU gettext we have to set BUILD_INCLUDED_LIBINTL
+    dnl to 'yes' because some of the testsuite requires it.
+    if test "$PACKAGE" = gettext-runtime || test "$PACKAGE" = gettext-tools; then
+      BUILD_INCLUDED_LIBINTL=yes
+    fi
+
+    dnl Make all variables we use known to autoconf.
+    AC_SUBST([BUILD_INCLUDED_LIBINTL])
+    AC_SUBST([USE_INCLUDED_LIBINTL])
+    AC_SUBST([CATOBJEXT])
+
+    dnl For backward compatibility. Some configure.ins may be using this.
+    nls_cv_header_intl=
+    nls_cv_header_libgt=
+
+    dnl For backward compatibility. Some Makefiles may be using this.
+    DATADIRNAME=share
+    AC_SUBST([DATADIRNAME])
+
+    dnl For backward compatibility. Some Makefiles may be using this.
+    INSTOBJEXT=.mo
+    AC_SUBST([INSTOBJEXT])
+
+    dnl For backward compatibility. Some Makefiles may be using this.
+    GENCAT=gencat
+    AC_SUBST([GENCAT])
+
+    dnl For backward compatibility. Some Makefiles may be using this.
+    INTLOBJS=
+    if test "$USE_INCLUDED_LIBINTL" = yes; then
+      INTLOBJS="\$(GETTOBJS)"
+    fi
+    AC_SUBST([INTLOBJS])
+
+    dnl Enable libtool support if the surrounding package wishes it.
+    INTL_LIBTOOL_SUFFIX_PREFIX=gt_libtool_suffix_prefix
+    AC_SUBST([INTL_LIBTOOL_SUFFIX_PREFIX])
+  ])
+
+  dnl For backward compatibility. Some Makefiles may be using this.
+  INTLLIBS="$LIBINTL"
+  AC_SUBST([INTLLIBS])
+
+  dnl Make all documented variables known to autoconf.
+  AC_SUBST([LIBINTL])
+  AC_SUBST([LTLIBINTL])
+  AC_SUBST([POSUB])
+])
+
+
+dnl gt_NEEDS_INIT ensures that the gt_needs variable is initialized.
+m4_define([gt_NEEDS_INIT],
+[
+  m4_divert_text([DEFAULTS], [gt_needs=])
+  m4_define([gt_NEEDS_INIT], [])
+])
+
+
+dnl Usage: AM_GNU_GETTEXT_NEED([NEEDSYMBOL])
+AC_DEFUN([AM_GNU_GETTEXT_NEED],
+[
+  m4_divert_text([INIT_PREPARE], [gt_needs="$gt_needs $1"])
+])
+
+
+dnl Usage: AM_GNU_GETTEXT_VERSION([gettext-version])
+AC_DEFUN([AM_GNU_GETTEXT_VERSION], [])
diff --git a/src/grep/m4/gettimeofday.m4 b/src/grep/m4/gettimeofday.m4
new file mode 100644
index 0000000..37c5440
--- /dev/null
+++ b/src/grep/m4/gettimeofday.m4
@@ -0,0 +1,69 @@
+# serial 29
+
+# Copyright (C) 2001-2003, 2005, 2007, 2009-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+dnl From Jim Meyering.
+
+AC_DEFUN([gl_FUNC_GETTIMEOFDAY],
+[
+  AC_REQUIRE([gl_SYS_TIME_H_DEFAULTS])
+  AC_REQUIRE([AC_C_RESTRICT])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([gl_SYS_TIME_H])
+  AC_CHECK_FUNCS_ONCE([gettimeofday])
+
+  gl_gettimeofday_timezone=void
+  if test $ac_cv_func_gettimeofday != yes; then
+    HAVE_GETTIMEOFDAY=0
+  else
+    AC_CACHE_CHECK([for gettimeofday with POSIX signature],
+      [gl_cv_func_gettimeofday_posix_signature],
+      [AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[#include <sys/time.h>
+              struct timeval c;
+              int gettimeofday (struct timeval *restrict, void *restrict);
+            ]],
+            [[/* glibc uses struct timezone * rather than the POSIX void *
+                 if _GNU_SOURCE is defined.  However, since the only portable
+                 use of gettimeofday uses NULL as the second parameter, and
+                 since the glibc definition is actually more typesafe, it is
+                 not worth wrapping this to get a compliant signature.  */
+              int (*f) (struct timeval *restrict, void *restrict)
+                = gettimeofday;
+              int x = f (&c, 0);
+              return !(x | c.tv_sec | c.tv_usec);
+            ]])],
+          [gl_cv_func_gettimeofday_posix_signature=yes],
+          [AC_COMPILE_IFELSE(
+            [AC_LANG_PROGRAM(
+              [[#include <sys/time.h>
+int gettimeofday (struct timeval *restrict, struct timezone *restrict);
+              ]])],
+            [gl_cv_func_gettimeofday_posix_signature=almost],
+            [gl_cv_func_gettimeofday_posix_signature=no])])])
+    if test $gl_cv_func_gettimeofday_posix_signature = almost; then
+      gl_gettimeofday_timezone='struct timezone'
+    elif test $gl_cv_func_gettimeofday_posix_signature != yes; then
+      REPLACE_GETTIMEOFDAY=1
+    fi
+    dnl If we override 'struct timeval', we also have to override gettimeofday.
+    if test $REPLACE_STRUCT_TIMEVAL = 1; then
+      REPLACE_GETTIMEOFDAY=1
+    fi
+    dnl On mingw, the original gettimeofday has only a precision of 15.6
+    dnl milliseconds. So override it.
+    case "$host_os" in
+      mingw*) REPLACE_GETTIMEOFDAY=1 ;;
+    esac
+  fi
+  AC_DEFINE_UNQUOTED([GETTIMEOFDAY_TIMEZONE], [$gl_gettimeofday_timezone],
+    [Define this to 'void' or 'struct timezone' to match the system's
+     declaration of the second argument to gettimeofday.])
+])
+
+# Prerequisites of lib/gettimeofday.c.
+AC_DEFUN([gl_PREREQ_GETTIMEOFDAY], [:])
diff --git a/src/grep/m4/gnulib-common.m4 b/src/grep/m4/gnulib-common.m4
new file mode 100644
index 0000000..c801b3d
--- /dev/null
+++ b/src/grep/m4/gnulib-common.m4
@@ -0,0 +1,827 @@
+# gnulib-common.m4 serial 67
+dnl Copyright (C) 2007-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_PREREQ([2.62])
+
+# gl_COMMON
+# is expanded unconditionally through gnulib-tool magic.
+AC_DEFUN([gl_COMMON], [
+  dnl Use AC_REQUIRE here, so that the code is expanded once only.
+  AC_REQUIRE([gl_00GNULIB])
+  AC_REQUIRE([gl_COMMON_BODY])
+  AC_REQUIRE([gl_ZZGNULIB])
+])
+AC_DEFUN([gl_COMMON_BODY], [
+  AH_VERBATIM([_GL_GNUC_PREREQ],
+[/* True if the compiler says it groks GNU C version MAJOR.MINOR.  */
+#if defined __GNUC__ && defined __GNUC_MINOR__
+# define _GL_GNUC_PREREQ(major, minor) \
+    ((major) < __GNUC__ + ((minor) <= __GNUC_MINOR__))
+#else
+# define _GL_GNUC_PREREQ(major, minor) 0
+#endif
+])
+  AH_VERBATIM([_Noreturn],
+[/* The _Noreturn keyword of C11.  */
+#ifndef _Noreturn
+# if (defined __cplusplus \
+      && ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \
+          || (defined _MSC_VER && 1900 <= _MSC_VER)) \
+      && 0)
+    /* [[noreturn]] is not practically usable, because with it the syntax
+         extern _Noreturn void func (...);
+       would not be valid; such a declaration would only be valid with 'extern'
+       and '_Noreturn' swapped, or without the 'extern' keyword.  However, some
+       AIX system header files and several gnulib header files use precisely
+       this syntax with 'extern'.  */
+#  define _Noreturn [[noreturn]]
+# elif ((!defined __cplusplus || defined __clang__) \
+        && (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \
+            || (!defined __STRICT_ANSI__ \
+                && (_GL_GNUC_PREREQ (4, 7) \
+                    || (defined __apple_build_version__ \
+                        ? 6000000 <= __apple_build_version__ \
+                        : 3 < __clang_major__ + (5 <= __clang_minor__))))))
+   /* _Noreturn works as-is.  */
+# elif _GL_GNUC_PREREQ (2, 8) || defined __clang__ || 0x5110 <= __SUNPRO_C
+#  define _Noreturn __attribute__ ((__noreturn__))
+# elif 1200 <= (defined _MSC_VER ? _MSC_VER : 0)
+#  define _Noreturn __declspec (noreturn)
+# else
+#  define _Noreturn
+# endif
+#endif
+])
+  AH_VERBATIM([isoc99_inline],
+[/* Work around a bug in Apple GCC 4.0.1 build 5465: In C99 mode, it supports
+   the ISO C 99 semantics of 'extern inline' (unlike the GNU C semantics of
+   earlier versions), but does not display it by setting __GNUC_STDC_INLINE__.
+   __APPLE__ && __MACH__ test for Mac OS X.
+   __APPLE_CC__ tests for the Apple compiler and its version.
+   __STDC_VERSION__ tests for the C99 mode.  */
+#if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined __cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__
+# define __GNUC_STDC_INLINE__ 1
+#endif])
+  AH_VERBATIM([attribute],
+[/* Attributes.  */
+#if (defined __has_attribute \
+     && (!defined __clang_minor__ \
+         || 3 < __clang_major__ + (5 <= __clang_minor__)))
+# define _GL_HAS_ATTRIBUTE(attr) __has_attribute (__##attr##__)
+#else
+# define _GL_HAS_ATTRIBUTE(attr) _GL_ATTR_##attr
+# define _GL_ATTR_alloc_size _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_always_inline _GL_GNUC_PREREQ (3, 2)
+# define _GL_ATTR_artificial _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_cold _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_const _GL_GNUC_PREREQ (2, 95)
+# define _GL_ATTR_deprecated _GL_GNUC_PREREQ (3, 1)
+# define _GL_ATTR_diagnose_if 0
+# define _GL_ATTR_error _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_externally_visible _GL_GNUC_PREREQ (4, 1)
+# define _GL_ATTR_fallthrough _GL_GNUC_PREREQ (7, 0)
+# define _GL_ATTR_format _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_leaf _GL_GNUC_PREREQ (4, 6)
+# define _GL_ATTR_malloc _GL_GNUC_PREREQ (3, 0)
+# ifdef _ICC
+#  define _GL_ATTR_may_alias 0
+# else
+#  define _GL_ATTR_may_alias _GL_GNUC_PREREQ (3, 3)
+# endif
+# define _GL_ATTR_noinline _GL_GNUC_PREREQ (3, 1)
+# define _GL_ATTR_nonnull _GL_GNUC_PREREQ (3, 3)
+# define _GL_ATTR_nonstring _GL_GNUC_PREREQ (8, 0)
+# define _GL_ATTR_nothrow _GL_GNUC_PREREQ (3, 3)
+# define _GL_ATTR_packed _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_pure _GL_GNUC_PREREQ (2, 96)
+# define _GL_ATTR_returns_nonnull _GL_GNUC_PREREQ (4, 9)
+# define _GL_ATTR_sentinel _GL_GNUC_PREREQ (4, 0)
+# define _GL_ATTR_unused _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_warn_unused_result _GL_GNUC_PREREQ (3, 4)
+#endif
+
+#ifdef __has_c_attribute
+# define _GL_HAS_C_ATTRIBUTE(attr) __has_c_attribute (__##attr##__)
+#else
+# define _GL_HAS_C_ATTRIBUTE(attr) 0
+#endif
+
+]dnl There is no _GL_ATTRIBUTE_ALIGNED; use stdalign's _Alignas instead.
+[
+#if _GL_HAS_ATTRIBUTE (alloc_size)
+# define _GL_ATTRIBUTE_ALLOC_SIZE(args) __attribute__ ((__alloc_size__ args))
+#else
+# define _GL_ATTRIBUTE_ALLOC_SIZE(args)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (always_inline)
+# define _GL_ATTRIBUTE_ALWAYS_INLINE __attribute__ ((__always_inline__))
+#else
+# define _GL_ATTRIBUTE_ALWAYS_INLINE
+#endif
+
+#if _GL_HAS_ATTRIBUTE (artificial)
+# define _GL_ATTRIBUTE_ARTIFICIAL __attribute__ ((__artificial__))
+#else
+# define _GL_ATTRIBUTE_ARTIFICIAL
+#endif
+
+/* Avoid __attribute__ ((cold)) on MinGW; see thread starting at
+   <https://lists.gnu.org/r/emacs-devel/2019-04/msg01152.html>.
+   Also, Oracle Studio 12.6 requires 'cold' not '__cold__'.  */
+#if _GL_HAS_ATTRIBUTE (cold) && !defined __MINGW32__
+# ifndef __SUNPRO_C
+#  define _GL_ATTRIBUTE_COLD __attribute__ ((__cold__))
+# else
+#  define _GL_ATTRIBUTE_COLD __attribute__ ((cold))
+# endif
+#else
+# define _GL_ATTRIBUTE_COLD
+#endif
+
+#if _GL_HAS_ATTRIBUTE (const)
+# define _GL_ATTRIBUTE_CONST __attribute__ ((__const__))
+#else
+# define _GL_ATTRIBUTE_CONST
+#endif
+
+/* _GL_ATTRIBUTE_DEALLOC (F, I) is for functions returning pointers
+   that can be freed by passing them as the Ith argument to the
+   function F.  _GL_ATTRIBUTE_DEALLOC_FREE is for functions that
+   return pointers that can be freed via 'free'; it can be used
+   only after including stdlib.h.  These macros cannot be used on
+   inline functions.  */
+#if _GL_GNUC_PREREQ (11, 0)
+# define _GL_ATTRIBUTE_DEALLOC(f, i) __attribute__ ((__malloc__ (f, i)))
+#else
+# define _GL_ATTRIBUTE_DEALLOC(f, i)
+#endif
+#define _GL_ATTRIBUTE_DEALLOC_FREE _GL_ATTRIBUTE_DEALLOC (free, 1)
+
+#if _GL_HAS_C_ATTRIBUTE (deprecated)
+# define _GL_ATTRIBUTE_DEPRECATED [[__deprecated__]]
+#elif _GL_HAS_ATTRIBUTE (deprecated)
+# define _GL_ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__))
+#else
+# define _GL_ATTRIBUTE_DEPRECATED
+#endif
+
+#if _GL_HAS_ATTRIBUTE (error)
+# define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__error__ (msg)))
+# define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__warning__ (msg)))
+#elif _GL_HAS_ATTRIBUTE (diagnose_if)
+# define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__diagnose_if__ (1, msg, "error")))
+# define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__diagnose_if__ (1, msg, "warning")))
+#else
+# define _GL_ATTRIBUTE_ERROR(msg)
+# define _GL_ATTRIBUTE_WARNING(msg)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (externally_visible)
+# define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((externally_visible))
+#else
+# define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE
+#endif
+
+/* FALLTHROUGH is special, because it always expands to something.  */
+#if _GL_HAS_C_ATTRIBUTE (fallthrough)
+# define _GL_ATTRIBUTE_FALLTHROUGH [[__fallthrough__]]
+#elif _GL_HAS_ATTRIBUTE (fallthrough)
+# define _GL_ATTRIBUTE_FALLTHROUGH __attribute__ ((__fallthrough__))
+#else
+# define _GL_ATTRIBUTE_FALLTHROUGH ((void) 0)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (format)
+# define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
+#else
+# define _GL_ATTRIBUTE_FORMAT(spec)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (leaf)
+# define _GL_ATTRIBUTE_LEAF __attribute__ ((__leaf__))
+#else
+# define _GL_ATTRIBUTE_LEAF
+#endif
+
+#if _GL_HAS_ATTRIBUTE (malloc)
+# define _GL_ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
+#else
+# define _GL_ATTRIBUTE_MALLOC
+#endif
+
+/* Oracle Studio 12.6 mishandles may_alias despite __has_attribute OK.  */
+#if _GL_HAS_ATTRIBUTE (may_alias) && !defined __SUNPRO_C
+# define _GL_ATTRIBUTE_MAY_ALIAS __attribute__ ((__may_alias__))
+#else
+# define _GL_ATTRIBUTE_MAY_ALIAS
+#endif
+
+#if _GL_HAS_C_ATTRIBUTE (maybe_unused)
+# define _GL_ATTRIBUTE_MAYBE_UNUSED [[__maybe_unused__]]
+#else
+# define _GL_ATTRIBUTE_MAYBE_UNUSED _GL_ATTRIBUTE_UNUSED
+#endif
+/* Earlier spellings of this macro.  */
+#define _UNUSED_PARAMETER_ _GL_ATTRIBUTE_MAYBE_UNUSED
+
+#if _GL_HAS_C_ATTRIBUTE (nodiscard)
+# define _GL_ATTRIBUTE_NODISCARD [[__nodiscard__]]
+#elif _GL_HAS_ATTRIBUTE (warn_unused_result)
+# define _GL_ATTRIBUTE_NODISCARD __attribute__ ((__warn_unused_result__))
+#else
+# define _GL_ATTRIBUTE_NODISCARD
+#endif
+
+#if _GL_HAS_ATTRIBUTE (noinline)
+# define _GL_ATTRIBUTE_NOINLINE __attribute__ ((__noinline__))
+#else
+# define _GL_ATTRIBUTE_NOINLINE
+#endif
+
+#if _GL_HAS_ATTRIBUTE (nonnull)
+# define _GL_ATTRIBUTE_NONNULL(args) __attribute__ ((__nonnull__ args))
+#else
+# define _GL_ATTRIBUTE_NONNULL(args)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (nonstring)
+# define _GL_ATTRIBUTE_NONSTRING __attribute__ ((__nonstring__))
+#else
+# define _GL_ATTRIBUTE_NONSTRING
+#endif
+
+/* There is no _GL_ATTRIBUTE_NORETURN; use _Noreturn instead.  */
+
+#if _GL_HAS_ATTRIBUTE (nothrow) && !defined __cplusplus
+# define _GL_ATTRIBUTE_NOTHROW __attribute__ ((__nothrow__))
+#else
+# define _GL_ATTRIBUTE_NOTHROW
+#endif
+
+#if _GL_HAS_ATTRIBUTE (packed)
+# define _GL_ATTRIBUTE_PACKED __attribute__ ((__packed__))
+#else
+# define _GL_ATTRIBUTE_PACKED
+#endif
+
+#if _GL_HAS_ATTRIBUTE (pure)
+# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+#else
+# define _GL_ATTRIBUTE_PURE
+#endif
+
+#if _GL_HAS_ATTRIBUTE (returns_nonnull)
+# define _GL_ATTRIBUTE_RETURNS_NONNULL __attribute__ ((__returns_nonnull__))
+#else
+# define _GL_ATTRIBUTE_RETURNS_NONNULL
+#endif
+
+#if _GL_HAS_ATTRIBUTE (sentinel)
+# define _GL_ATTRIBUTE_SENTINEL(pos) __attribute__ ((__sentinel__ pos))
+#else
+# define _GL_ATTRIBUTE_SENTINEL(pos)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (unused)
+# define _GL_ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+#else
+# define _GL_ATTRIBUTE_UNUSED
+#endif
+/* Earlier spellings of this macro.  */
+#define _GL_UNUSED _GL_ATTRIBUTE_UNUSED
+
+]dnl There is no _GL_ATTRIBUTE_VISIBILITY; see m4/visibility.m4 instead.
+[
+/* To support C++ as well as C, use _GL_UNUSED_LABEL with trailing ';'.  */
+#if !defined __cplusplus || _GL_GNUC_PREREQ (4, 5)
+# define _GL_UNUSED_LABEL _GL_ATTRIBUTE_UNUSED
+#else
+# define _GL_UNUSED_LABEL
+#endif
+])
+  AH_VERBATIM([async_safe],
+[/* The _GL_ASYNC_SAFE marker should be attached to functions that are
+   signal handlers (for signals other than SIGABRT, SIGPIPE) or can be
+   invoked from such signal handlers.  Such functions have some restrictions:
+     * All functions that it calls should be marked _GL_ASYNC_SAFE as well,
+       or should be listed as async-signal-safe in POSIX
+       <https://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html#tag_15_04>
+       section 2.4.3.  Note that malloc(), sprintf(), and fwrite(), in
+       particular, are NOT async-signal-safe.
+     * All memory locations (variables and struct fields) that these functions
+       access must be marked 'volatile'.  This holds for both read and write
+       accesses.  Otherwise the compiler might optimize away stores to and
+       reads from such locations that occur in the program, depending on its
+       data flow analysis.  For example, when the program contains a loop
+       that is intended to inspect a variable set from within a signal handler
+           while (!signal_occurred)
+             ;
+       the compiler is allowed to transform this into an endless loop if the
+       variable 'signal_occurred' is not declared 'volatile'.
+   Additionally, recall that:
+     * A signal handler should not modify errno (except if it is a handler
+       for a fatal signal and ends by raising the same signal again, thus
+       provoking the termination of the process).  If it invokes a function
+       that may clobber errno, it needs to save and restore the value of
+       errno.  */
+#define _GL_ASYNC_SAFE
+])
+  AH_VERBATIM([micro_optimizations],
+[/* _GL_CMP (n1, n2) performs a three-valued comparison on n1 vs. n2, where
+   n1 and n2 are expressions without side effects, that evaluate to real
+   numbers (excluding NaN).
+   It returns
+     1  if n1 > n2
+     0  if n1 == n2
+     -1 if n1 < n2
+   The naïve code   (n1 > n2 ? 1 : n1 < n2 ? -1 : 0)  produces a conditional
+   jump with nearly all GCC versions up to GCC 10.
+   This variant     (n1 < n2 ? -1 : n1 > n2)  produces a conditional with many
+   GCC versions up to GCC 9.
+   The better code  (n1 > n2) - (n1 < n2)  from Hacker's Delight § 2-9
+   avoids conditional jumps in all GCC versions >= 3.4.  */
+#define _GL_CMP(n1, n2) (((n1) > (n2)) - ((n1) < (n2)))
+])
+  dnl Hint which direction to take regarding cross-compilation guesses:
+  dnl When a user installs a program on a platform they are not intimately
+  dnl familiar with, --enable-cross-guesses=conservative is the appropriate
+  dnl choice.  It implements the "If we don't know, assume the worst" principle.
+  dnl However, when an operating system developer (on a platform which is not
+  dnl yet known to gnulib) builds packages for their platform, they want to
+  dnl expose, not hide, possible platform bugs; in this case,
+  dnl --enable-cross-guesses=risky is the appropriate choice.
+  dnl Sets the variables
+  dnl gl_cross_guess_normal    (to be used when 'yes' is good and 'no' is bad),
+  dnl gl_cross_guess_inverted  (to be used when 'no' is good and 'yes' is bad).
+  AC_ARG_ENABLE([cross-guesses],
+    [AS_HELP_STRING([--enable-cross-guesses={conservative|risky}],
+       [specify policy for cross-compilation guesses])],
+    [if test "x$enableval" != xconservative && test "x$enableval" != xrisky; then
+       AC_MSG_WARN([invalid argument supplied to --enable-cross-guesses])
+       enableval=conservative
+     fi
+     gl_cross_guesses="$enableval"],
+    [gl_cross_guesses=conservative])
+  if test $gl_cross_guesses = risky; then
+    gl_cross_guess_normal="guessing yes"
+    gl_cross_guess_inverted="guessing no"
+  else
+    gl_cross_guess_normal="guessing no"
+    gl_cross_guess_inverted="guessing yes"
+  fi
+  dnl Preparation for running test programs:
+  dnl Tell glibc to write diagnostics from -D_FORTIFY_SOURCE=2 to stderr, not
+  dnl to /dev/tty, so they can be redirected to log files.  Such diagnostics
+  dnl arise e.g., in the macros gl_PRINTF_DIRECTIVE_N, gl_SNPRINTF_DIRECTIVE_N.
+  LIBC_FATAL_STDERR_=1
+  export LIBC_FATAL_STDERR_
+])
+
+# gl_MODULE_INDICATOR_INIT_VARIABLE([variablename])
+# gl_MODULE_INDICATOR_INIT_VARIABLE([variablename], [initialvalue])
+# initializes the shell variable that indicates the presence of the given module
+# as a C preprocessor expression.
+AC_DEFUN([gl_MODULE_INDICATOR_INIT_VARIABLE],
+[
+  GL_MODULE_INDICATOR_PREFIX[]_[$1]=m4_if([$2], , [0], [$2])
+  AC_SUBST(GL_MODULE_INDICATOR_PREFIX[]_[$1])
+])
+
+# gl_MODULE_INDICATOR_CONDITION
+# expands to a C preprocessor expression that evaluates to 1 or 0, depending
+# whether a gnulib module that has been requested shall be considered present
+# or not.
+m4_define([gl_MODULE_INDICATOR_CONDITION], [1])
+
+# gl_MODULE_INDICATOR_SET_VARIABLE([modulename])
+# sets the shell variable that indicates the presence of the given module to
+# a C preprocessor expression that will evaluate to 1.
+AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE],
+[
+  gl_MODULE_INDICATOR_SET_VARIABLE_AUX(
+    [GL_MODULE_INDICATOR_PREFIX[]_GNULIB_[]m4_translit([[$1]],
+                                                       [abcdefghijklmnopqrstuvwxyz./-],
+                                                       [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])],
+    [gl_MODULE_INDICATOR_CONDITION])
+])
+
+# gl_MODULE_INDICATOR_SET_VARIABLE_AUX([variable])
+# modifies the shell variable to include the gl_MODULE_INDICATOR_CONDITION.
+# The shell variable's value is a C preprocessor expression that evaluates
+# to 0 or 1.
+AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE_AUX],
+[
+  m4_if(m4_defn([gl_MODULE_INDICATOR_CONDITION]), [1],
+    [
+     dnl Simplify the expression VALUE || 1 to 1.
+     $1=1
+    ],
+    [gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR([$1],
+                                             [gl_MODULE_INDICATOR_CONDITION])])
+])
+
+# gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR([variable], [condition])
+# modifies the shell variable to include the given condition.  The shell
+# variable's value is a C preprocessor expression that evaluates to 0 or 1.
+AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR],
+[
+  dnl Simplify the expression 1 || CONDITION to 1.
+  if test "$[]$1" != 1; then
+    dnl Simplify the expression 0 || CONDITION to CONDITION.
+    if test "$[]$1" = 0; then
+      $1=$2
+    else
+      $1="($[]$1 || $2)"
+    fi
+  fi
+])
+
+# gl_MODULE_INDICATOR([modulename])
+# defines a C macro indicating the presence of the given module
+# in a location where it can be used.
+#                                             |  Value  |   Value   |
+#                                             | in lib/ | in tests/ |
+# --------------------------------------------+---------+-----------+
+# Module present among main modules:          |    1    |     1     |
+# --------------------------------------------+---------+-----------+
+# Module present among tests-related modules: |    0    |     1     |
+# --------------------------------------------+---------+-----------+
+# Module not present at all:                  |    0    |     0     |
+# --------------------------------------------+---------+-----------+
+AC_DEFUN([gl_MODULE_INDICATOR],
+[
+  AC_DEFINE_UNQUOTED([GNULIB_]m4_translit([[$1]],
+      [abcdefghijklmnopqrstuvwxyz./-],
+      [ABCDEFGHIJKLMNOPQRSTUVWXYZ___]),
+    [gl_MODULE_INDICATOR_CONDITION],
+    [Define to a C preprocessor expression that evaluates to 1 or 0,
+     depending whether the gnulib module $1 shall be considered present.])
+])
+
+# gl_MODULE_INDICATOR_FOR_TESTS([modulename])
+# defines a C macro indicating the presence of the given module
+# in lib or tests. This is useful to determine whether the module
+# should be tested.
+#                                             |  Value  |   Value   |
+#                                             | in lib/ | in tests/ |
+# --------------------------------------------+---------+-----------+
+# Module present among main modules:          |    1    |     1     |
+# --------------------------------------------+---------+-----------+
+# Module present among tests-related modules: |    1    |     1     |
+# --------------------------------------------+---------+-----------+
+# Module not present at all:                  |    0    |     0     |
+# --------------------------------------------+---------+-----------+
+AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS],
+[
+  AC_DEFINE([GNULIB_TEST_]m4_translit([[$1]],
+      [abcdefghijklmnopqrstuvwxyz./-],
+      [ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), [1],
+    [Define to 1 when the gnulib module $1 should be tested.])
+])
+
+# gl_ASSERT_NO_GNULIB_POSIXCHECK
+# asserts that there will never be a need to #define GNULIB_POSIXCHECK.
+# and thereby enables an optimization of configure and config.h.
+# Used by Emacs.
+AC_DEFUN([gl_ASSERT_NO_GNULIB_POSIXCHECK],
+[
+  dnl Override gl_WARN_ON_USE_PREPARE.
+  dnl But hide this definition from 'aclocal'.
+  AC_DEFUN([gl_W][ARN_ON_USE_PREPARE], [])
+])
+
+# gl_ASSERT_NO_GNULIB_TESTS
+# asserts that there will be no gnulib tests in the scope of the configure.ac
+# and thereby enables an optimization of config.h.
+# Used by Emacs.
+AC_DEFUN([gl_ASSERT_NO_GNULIB_TESTS],
+[
+  dnl Override gl_MODULE_INDICATOR_FOR_TESTS.
+  AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS], [])
+])
+
+# Test whether <features.h> exists.
+# Set HAVE_FEATURES_H.
+AC_DEFUN([gl_FEATURES_H],
+[
+  AC_CHECK_HEADERS_ONCE([features.h])
+  if test $ac_cv_header_features_h = yes; then
+    HAVE_FEATURES_H=1
+  else
+    HAVE_FEATURES_H=0
+  fi
+  AC_SUBST([HAVE_FEATURES_H])
+])
+
+# gl_PROG_CC_C99
+# Modifies the value of the shell variable CC in an attempt to make $CC
+# understand ISO C99 source code.
+AC_DEFUN([gl_PROG_CC_C99],
+[
+  dnl Just use AC_PROG_CC_C99.
+  dnl When AC_PROG_CC_C99 and AC_PROG_CC_STDC are used together, the substituted
+  dnl value of CC will contain the C99 enabling options twice. But this is only
+  dnl a cosmetic problem.
+  dnl With Autoconf >= 2.70, use AC_PROG_CC since it implies AC_PROG_CC_C99;
+  dnl this avoids a "warning: The macro `AC_PROG_CC_C99' is obsolete."
+  m4_version_prereq([2.70],
+    [AC_REQUIRE([AC_PROG_CC])],
+    [AC_REQUIRE([AC_PROG_CC_C99])])
+])
+
+# gl_PROG_AR_RANLIB
+# Determines the values for AR, ARFLAGS, RANLIB that fit with the compiler.
+# The user can set the variables AR, ARFLAGS, RANLIB if he wants to override
+# the values.
+AC_DEFUN([gl_PROG_AR_RANLIB],
+[
+  dnl Minix 3 comes with two toolchains: The Amsterdam Compiler Kit compiler
+  dnl as "cc", and GCC as "gcc". They have different object file formats and
+  dnl library formats. In particular, the GNU binutils programs ar and ranlib
+  dnl produce libraries that work only with gcc, not with cc.
+  AC_REQUIRE([AC_PROG_CC])
+  dnl The '][' hides this use from 'aclocal'.
+  AC_BEFORE([$0], [A][M_PROG_AR])
+  AC_CACHE_CHECK([for Minix Amsterdam compiler], [gl_cv_c_amsterdam_compiler],
+    [
+      AC_EGREP_CPP([Amsterdam],
+        [
+#ifdef __ACK__
+Amsterdam
+#endif
+        ],
+        [gl_cv_c_amsterdam_compiler=yes],
+        [gl_cv_c_amsterdam_compiler=no])
+    ])
+
+  dnl Don't compete with AM_PROG_AR's decision about AR/ARFLAGS if we are not
+  dnl building with __ACK__.
+  if test $gl_cv_c_amsterdam_compiler = yes; then
+    if test -z "$AR"; then
+      AR='cc -c.a'
+    fi
+    if test -z "$ARFLAGS"; then
+      ARFLAGS='-o'
+    fi
+  else
+    dnl AM_PROG_AR was added in automake v1.11.2.  AM_PROG_AR does not AC_SUBST
+    dnl ARFLAGS variable (it is filed into Makefile.in directly by automake
+    dnl script on-demand, if not specified by ./configure of course).
+    dnl Don't AC_REQUIRE the AM_PROG_AR otherwise the code for __ACK__ above
+    dnl will be ignored.  Also, pay attention to call AM_PROG_AR in else block
+    dnl because AM_PROG_AR is written so it could re-set AR variable even for
+    dnl __ACK__.  It may seem like its easier to avoid calling the macro here,
+    dnl but we need to AC_SUBST both AR/ARFLAGS (thus those must have some good
+    dnl default value and automake should usually know them).
+    dnl
+    dnl The '][' hides this use from 'aclocal'.
+    m4_ifdef([A][M_PROG_AR], [A][M_PROG_AR], [:])
+  fi
+
+  dnl In case the code above has not helped with setting AR/ARFLAGS, use
+  dnl Automake-documented default values for AR and ARFLAGS, but prefer
+  dnl ${host}-ar over ar (useful for cross-compiling).
+  AC_CHECK_TOOL([AR], [ar], [ar])
+  if test -z "$ARFLAGS"; then
+    ARFLAGS='cr'
+  fi
+
+  AC_SUBST([AR])
+  AC_SUBST([ARFLAGS])
+  if test -z "$RANLIB"; then
+    if test $gl_cv_c_amsterdam_compiler = yes; then
+      RANLIB=':'
+    else
+      dnl Use the ranlib program if it is available.
+      AC_PROG_RANLIB
+    fi
+  fi
+  AC_SUBST([RANLIB])
+])
+
+# AC_C_RESTRICT
+# This definition is copied from post-2.70 Autoconf and overrides the
+# AC_C_RESTRICT macro from autoconf 2.60..2.70.
+m4_version_prereq([2.70.1], [], [
+AC_DEFUN([AC_C_RESTRICT],
+[AC_CACHE_CHECK([for C/C++ restrict keyword], [ac_cv_c_restrict],
+  [ac_cv_c_restrict=no
+   # Put '__restrict__' first, to avoid problems with glibc and non-GCC; see:
+   # https://lists.gnu.org/archive/html/bug-autoconf/2016-02/msg00006.html
+   # Put 'restrict' last, because C++ lacks it.
+   for ac_kw in __restrict__ __restrict _Restrict restrict; do
+     AC_COMPILE_IFELSE(
+      [AC_LANG_PROGRAM(
+         [[typedef int *int_ptr;
+           int foo (int_ptr $ac_kw ip) { return ip[0]; }
+           int bar (int [$ac_kw]); /* Catch GCC bug 14050.  */
+           int bar (int ip[$ac_kw]) { return ip[0]; }
+         ]],
+         [[int s[1];
+           int *$ac_kw t = s;
+           t[0] = 0;
+           return foo (t) + bar (t);
+         ]])],
+      [ac_cv_c_restrict=$ac_kw])
+     test "$ac_cv_c_restrict" != no && break
+   done
+  ])
+ AH_VERBATIM([restrict],
+[/* Define to the equivalent of the C99 'restrict' keyword, or to
+   nothing if this is not supported.  Do not define if restrict is
+   supported only directly.  */
+#undef restrict
+/* Work around a bug in older versions of Sun C++, which did not
+   #define __restrict__ or support _Restrict or __restrict__
+   even though the corresponding Sun C compiler ended up with
+   "#define restrict _Restrict" or "#define restrict __restrict__"
+   in the previous line.  This workaround can be removed once
+   we assume Oracle Developer Studio 12.5 (2016) or later.  */
+#if defined __SUNPRO_CC && !defined __RESTRICT && !defined __restrict__
+# define _Restrict
+# define __restrict__
+#endif])
+ case $ac_cv_c_restrict in
+   restrict) ;;
+   no) AC_DEFINE([restrict], []) ;;
+   *)  AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;;
+ esac
+])# AC_C_RESTRICT
+])
+
+# gl_BIGENDIAN
+# is like AC_C_BIGENDIAN, except that it can be AC_REQUIREd.
+# Note that AC_REQUIRE([AC_C_BIGENDIAN]) does not work reliably because some
+# macros invoke AC_C_BIGENDIAN with arguments.
+AC_DEFUN([gl_BIGENDIAN],
+[
+  AC_C_BIGENDIAN
+])
+
+# A temporary file descriptor.
+# Must be less than 10, because dash 0.5.8 does not support redirections
+# with multi-digit file descriptors.
+m4_define([GL_TMP_FD], 9)
+
+# gl_SILENT(command)
+# executes command, but without the normal configure output.
+# This is useful when you want to invoke AC_CACHE_CHECK (or AC_CHECK_FUNC etc.)
+# inside another AC_CACHE_CHECK.
+AC_DEFUN([gl_SILENT],
+[
+  exec GL_TMP_FD>&AS_MESSAGE_FD AS_MESSAGE_FD>/dev/null
+  $1
+  exec AS_MESSAGE_FD>&GL_TMP_FD GL_TMP_FD>&-
+])
+
+# gl_CACHE_VAL_SILENT(cache-id, command-to-set-it)
+# is like AC_CACHE_VAL(cache-id, command-to-set-it), except that it does not
+# output a spurious "(cached)" mark in the midst of other configure output.
+# This macro should be used instead of AC_CACHE_VAL when it is not surrounded
+# by an AC_MSG_CHECKING/AC_MSG_RESULT pair.
+AC_DEFUN([gl_CACHE_VAL_SILENT],
+[
+  gl_SILENT([
+    AC_CACHE_VAL([$1], [$2])
+  ])
+])
+
+# gl_CC_ALLOW_WARNINGS
+# sets and substitutes a variable GL_CFLAG_ALLOW_WARNINGS, to a $(CC) option
+# that reverts a preceding '-Werror' option, if available.
+# This is expected to be '-Wno-error' on gcc, clang (except clang/MSVC), xlclang
+# and empty otherwise.
+AC_DEFUN([gl_CC_ALLOW_WARNINGS],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_CACHE_CHECK([for C compiler option to allow warnings],
+    [gl_cv_cc_wallow],
+    [rm -f conftest*
+     echo 'int dummy;' > conftest.c
+     AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c 2>conftest1.err]) >/dev/null
+     AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -Wno-error -c conftest.c 2>conftest2.err]) >/dev/null
+     dnl Test the number of error output lines, because AIX xlc accepts the
+     dnl option '-Wno-error', just to produce a warning
+     dnl "Option -Wno-error was incorrectly specified. The option will be ignored."
+     dnl afterwards.
+     if test $? = 0 && test `wc -l < conftest1.err` = `wc -l < conftest2.err`; then
+       gl_cv_cc_wallow='-Wno-error'
+     else
+       gl_cv_cc_wallow=none
+     fi
+     rm -f conftest*
+    ])
+  case "$gl_cv_cc_wallow" in
+    none) GL_CFLAG_ALLOW_WARNINGS='' ;;
+    *)    GL_CFLAG_ALLOW_WARNINGS="$gl_cv_cc_wallow" ;;
+  esac
+  AC_SUBST([GL_CFLAG_ALLOW_WARNINGS])
+])
+
+# gl_CXX_ALLOW_WARNINGS
+# sets and substitutes a variable GL_CXXFLAG_ALLOW_WARNINGS, to a $(CC) option
+# that reverts a preceding '-Werror' option, if available.
+AC_DEFUN([gl_CXX_ALLOW_WARNINGS],
+[
+  dnl Requires AC_PROG_CXX or gl_PROG_ANSI_CXX.
+  if test -n "$CXX" && test "$CXX" != no; then
+    AC_CACHE_CHECK([for C++ compiler option to allow warnings],
+      [gl_cv_cxx_wallow],
+      [rm -f conftest*
+       echo 'int dummy;' > conftest.cc
+       AC_TRY_COMMAND([${CXX-c++} $CXXFLAGS $CPPFLAGS -c conftest.cc 2>conftest1.err]) >/dev/null
+       AC_TRY_COMMAND([${CXX-c++} $CXXFLAGS $CPPFLAGS -Wno-error -c conftest.cc 2>conftest2.err]) >/dev/null
+       dnl Test the number of error output lines, because AIX xlC accepts the
+       dnl option '-Wno-error', just to produce a warning
+       dnl "Option -Wno-error was incorrectly specified. The option will be ignored."
+       dnl afterwards.
+       if test $? = 0 && test `wc -l < conftest1.err` = `wc -l < conftest2.err`; then
+         gl_cv_cxx_wallow='-Wno-error'
+       else
+         gl_cv_cxx_wallow=none
+       fi
+       rm -f conftest*
+      ])
+    case "$gl_cv_cxx_wallow" in
+      none) GL_CXXFLAG_ALLOW_WARNINGS='' ;;
+      *)    GL_CXXFLAG_ALLOW_WARNINGS="$gl_cv_cxx_wallow" ;;
+    esac
+  else
+    GL_CXXFLAG_ALLOW_WARNINGS=''
+  fi
+  AC_SUBST([GL_CXXFLAG_ALLOW_WARNINGS])
+])
+
+dnl Expands to some code for use in .c programs that, on native Windows, defines
+dnl the Microsoft deprecated alias function names to the underscore-prefixed
+dnl actual function names. With this macro, these function names are available
+dnl without linking with '-loldnames' and without generating warnings.
+dnl Usage: Use it after all system header files are included.
+dnl          #include <...>
+dnl          #include <...>
+dnl          ]GL_MDA_DEFINES[
+dnl          ...
+AC_DEFUN([GL_MDA_DEFINES],[
+AC_REQUIRE([_GL_MDA_DEFINES])
+[$gl_mda_defines]
+])
+AC_DEFUN([_GL_MDA_DEFINES],
+[gl_mda_defines='
+#if defined _WIN32 && !defined __CYGWIN__
+#define access    _access
+#define chdir     _chdir
+#define chmod     _chmod
+#define close     _close
+#define creat     _creat
+#define dup       _dup
+#define dup2      _dup2
+#define ecvt      _ecvt
+#define execl     _execl
+#define execle    _execle
+#define execlp    _execlp
+#define execv     _execv
+#define execve    _execve
+#define execvp    _execvp
+#define execvpe   _execvpe
+#define fcloseall _fcloseall
+#define fcvt      _fcvt
+#define fdopen    _fdopen
+#define fileno    _fileno
+#define gcvt      _gcvt
+#define getcwd    _getcwd
+#define getpid    _getpid
+#define getw      _getw
+#define isatty    _isatty
+#define j0        _j0
+#define j1        _j1
+#define jn        _jn
+#define lfind     _lfind
+#define lsearch   _lsearch
+#define lseek     _lseek
+#define memccpy   _memccpy
+#define mkdir     _mkdir
+#define mktemp    _mktemp
+#define open      _open
+#define putenv    _putenv
+#define putw      _putw
+#define read      _read
+#define rmdir     _rmdir
+#define strdup    _strdup
+#define swab      _swab
+#define tempnam   _tempnam
+#define tzset     _tzset
+#define umask     _umask
+#define unlink    _unlink
+#define utime     _utime
+#define wcsdup    _wcsdup
+#define write     _write
+#define y0        _y0
+#define y1        _y1
+#define yn        _yn
+#endif
+'
+])
diff --git a/src/grep/m4/gnulib-comp.m4 b/src/grep/m4/gnulib-comp.m4
new file mode 100644
index 0000000..cda87e0
--- /dev/null
+++ b/src/grep/m4/gnulib-comp.m4
@@ -0,0 +1,2623 @@
+# DO NOT EDIT! GENERATED AUTOMATICALLY!
+# Copyright (C) 2002-2021 Free Software Foundation, Inc.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This file is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this file.  If not, see <https://www.gnu.org/licenses/>.
+#
+# As a special exception to the GNU General Public License,
+# this file may be distributed as part of a program that
+# contains a configuration script generated by Autoconf, under
+# the same distribution terms as the rest of that program.
+#
+# Generated by gnulib-tool.
+#
+# This file represents the compiled summary of the specification in
+# gnulib-cache.m4. It lists the computed macro invocations that need
+# to be invoked from configure.ac.
+# In projects that use version control, this file can be treated like
+# other built files.
+
+
+# This macro should be invoked from ./configure.ac, in the section
+# "Checks for programs", right after AC_PROG_CC, and certainly before
+# any checks for libraries, header files, types and library functions.
+AC_DEFUN([gl_EARLY],
+[
+  m4_pattern_forbid([^gl_[A-Z]])dnl the gnulib macro namespace
+  m4_pattern_allow([^gl_ES$])dnl a valid locale name
+  m4_pattern_allow([^gl_LIBOBJS$])dnl a variable
+  m4_pattern_allow([^gl_LTLIBOBJS$])dnl a variable
+
+  # Pre-early section.
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+  AC_REQUIRE([gl_PROG_AR_RANLIB])
+
+  AC_REQUIRE([AM_PROG_CC_C_O])
+  # Code from module absolute-header:
+  # Code from module accept:
+  # Code from module accept-tests:
+  # Code from module alignof:
+  # Code from module alignof-tests:
+  # Code from module alloca:
+  # Code from module alloca-opt:
+  # Code from module alloca-opt-tests:
+  # Code from module announce-gen:
+  # Code from module argmatch:
+  # Code from module argmatch-tests:
+  # Code from module arpa_inet:
+  # Code from module arpa_inet-tests:
+  # Code from module assert:
+  # Code from module assure:
+  # Code from module at-internal:
+  # Code from module attribute:
+  # Code from module basename-lgpl:
+  # Code from module binary-io:
+  # Code from module binary-io-tests:
+  # Code from module bind:
+  # Code from module bind-tests:
+  # Code from module bitrotate:
+  # Code from module bitrotate-tests:
+  # Code from module btowc:
+  # Code from module btowc-tests:
+  # Code from module builtin-expect:
+  # Code from module c-ctype:
+  # Code from module c-ctype-tests:
+  # Code from module c-stack:
+  # Code from module c-stack-tests:
+  # Code from module c-strcase:
+  # Code from module c-strcase-tests:
+  # Code from module c-strcaseeq:
+  # Code from module c99:
+  # Code from module calloc-gnu:
+  # Code from module calloc-gnu-tests:
+  # Code from module calloc-posix:
+  # Code from module chdir:
+  # Code from module chdir-long:
+  # Code from module chdir-tests:
+  # Code from module cloexec:
+  # Code from module cloexec-tests:
+  # Code from module close:
+  # Code from module close-stream:
+  # Code from module close-tests:
+  # Code from module closedir:
+  # Code from module closeout:
+  # Code from module configmake:
+  # Code from module connect:
+  # Code from module connect-tests:
+  # Code from module ctype:
+  # Code from module ctype-tests:
+  # Code from module cycle-check:
+  # Code from module d-ino:
+  # Code from module d-type:
+  # Code from module dev-ino:
+  # Code from module dfa:
+  # Code from module dfa-tests:
+  # Code from module dirent:
+  # Code from module dirent-tests:
+  # Code from module dirfd:
+  # Code from module dirname-lgpl:
+  # Code from module do-release-commit-and-tag:
+  # Code from module double-slash-root:
+  # Code from module dup:
+  # Code from module dup-tests:
+  # Code from module dup2:
+  # Code from module dup2-tests:
+  # Code from module dynarray:
+  # Code from module dynarray-tests:
+  # Code from module environ:
+  # Code from module environ-tests:
+  # Code from module errno:
+  # Code from module errno-tests:
+  # Code from module error:
+  # Code from module exclude:
+  # Code from module exclude-tests:
+  # Code from module exitfail:
+  # Code from module extensions:
+  # Code from module extern-inline:
+  # Code from module fchdir:
+  # Code from module fchdir-tests:
+  # Code from module fcntl:
+  # Code from module fcntl-h:
+  # Code from module fcntl-h-tests:
+  # Code from module fcntl-safer:
+  # Code from module fcntl-safer-tests:
+  # Code from module fcntl-tests:
+  # Code from module fd-hook:
+  # Code from module fd-safer-flag:
+  # Code from module fdl:
+  # Code from module fdopen:
+  # Code from module fdopen-tests:
+  # Code from module fdopendir:
+  # Code from module fdopendir-tests:
+  # Code from module fgetc-tests:
+  # Code from module filename:
+  # Code from module filenamecat-lgpl:
+  # Code from module flexmember:
+  # Code from module float:
+  # Code from module float-tests:
+  # Code from module fnmatch:
+  # Code from module fnmatch-h:
+  # Code from module fnmatch-h-tests:
+  # Code from module fnmatch-tests:
+  # Code from module fopen:
+  # Code from module fopen-gnu:
+  # Code from module fopen-gnu-tests:
+  # Code from module fopen-tests:
+  # Code from module fpending:
+  # Code from module fpending-tests:
+  # Code from module fpieee:
+  AC_REQUIRE([gl_FP_IEEE])
+  # Code from module fpucw:
+  # Code from module fputc-tests:
+  # Code from module fread-tests:
+  # Code from module free-posix:
+  # Code from module free-posix-tests:
+  # Code from module fstat:
+  # Code from module fstat-tests:
+  # Code from module fstatat:
+  # Code from module fstatat-tests:
+  # Code from module ftruncate:
+  # Code from module ftruncate-tests:
+  # Code from module fts:
+  # Code from module fwrite-tests:
+  # Code from module gendocs:
+  # Code from module getcwd-lgpl:
+  # Code from module getcwd-lgpl-tests:
+  # Code from module getdtablesize:
+  # Code from module getdtablesize-tests:
+  # Code from module getopt-gnu:
+  # Code from module getopt-gnu-tests:
+  # Code from module getopt-posix:
+  # Code from module getopt-posix-tests:
+  # Code from module getpagesize:
+  # Code from module getprogname:
+  # Code from module getprogname-tests:
+  # Code from module gettext-h:
+  # Code from module gettimeofday:
+  # Code from module gettimeofday-tests:
+  # Code from module git-version-gen:
+  # Code from module gitlog-to-changelog:
+  # Code from module gnu-web-doc-update:
+  # Code from module gnumakefile:
+  # Code from module gnupload:
+  # Code from module gperf:
+  # Code from module hard-locale:
+  # Code from module hard-locale-tests:
+  # Code from module hash:
+  # Code from module hash-pjw:
+  # Code from module hash-tests:
+  # Code from module havelib:
+  # Code from module host-cpu-c-abi:
+  # Code from module i-ring:
+  # Code from module i-ring-tests:
+  # Code from module ialloc:
+  # Code from module iconv:
+  # Code from module iconv-h:
+  # Code from module iconv-h-tests:
+  # Code from module iconv-tests:
+  # Code from module iconv_open:
+  # Code from module idx:
+  # Code from module ignore-value:
+  # Code from module ignore-value-tests:
+  # Code from module include_next:
+  # Code from module inet_pton:
+  # Code from module inet_pton-tests:
+  # Code from module inline:
+  # Code from module intprops:
+  # Code from module intprops-tests:
+  # Code from module inttostr:
+  # Code from module inttostr-tests:
+  # Code from module inttypes:
+  # Code from module inttypes-incomplete:
+  # Code from module inttypes-tests:
+  # Code from module ioctl:
+  # Code from module ioctl-tests:
+  # Code from module isatty:
+  # Code from module isatty-tests:
+  # Code from module isblank:
+  # Code from module isblank-tests:
+  # Code from module iswblank:
+  # Code from module iswblank-tests:
+  # Code from module iswctype:
+  # Code from module iswdigit:
+  # Code from module iswdigit-tests:
+  # Code from module iswxdigit:
+  # Code from module iswxdigit-tests:
+  # Code from module langinfo:
+  # Code from module langinfo-tests:
+  # Code from module largefile:
+  AC_REQUIRE([AC_SYS_LARGEFILE])
+  AC_REQUIRE([gl_YEAR2038_EARLY])
+  # Code from module libc-config:
+  # Code from module limits-h:
+  # Code from module limits-h-tests:
+  # Code from module listen:
+  # Code from module listen-tests:
+  # Code from module localcharset:
+  # Code from module localcharset-tests:
+  # Code from module locale:
+  # Code from module locale-tests:
+  # Code from module localeconv:
+  # Code from module localeconv-tests:
+  # Code from module localename:
+  # Code from module localename-tests:
+  # Code from module lock:
+  # Code from module lseek:
+  # Code from module lseek-tests:
+  # Code from module lstat:
+  # Code from module lstat-tests:
+  # Code from module maintainer-makefile:
+  # Code from module malloc-gnu:
+  # Code from module malloc-gnu-tests:
+  # Code from module malloc-posix:
+  # Code from module malloca:
+  # Code from module malloca-tests:
+  # Code from module manywarnings:
+  # Code from module mbchar:
+  # Code from module mbiter:
+  # Code from module mbrlen:
+  # Code from module mbrtowc:
+  # Code from module mbscasecmp:
+  # Code from module mbscasecmp-tests:
+  # Code from module mbsinit:
+  # Code from module mbsinit-tests:
+  # Code from module mbslen:
+  # Code from module mbsrtowcs:
+  # Code from module mbsrtowcs-tests:
+  # Code from module mbsstr:
+  # Code from module mbsstr-tests:
+  # Code from module mbtowc:
+  # Code from module mbuiter:
+  # Code from module memchr:
+  # Code from module memchr-tests:
+  # Code from module memchr2:
+  # Code from module memchr2-tests:
+  # Code from module mempcpy:
+  # Code from module memrchr:
+  # Code from module memrchr-tests:
+  # Code from module minmax:
+  # Code from module msvc-inval:
+  # Code from module msvc-nothrow:
+  # Code from module multiarch:
+  # Code from module nanosleep:
+  # Code from module nanosleep-tests:
+  # Code from module netinet_in:
+  # Code from module netinet_in-tests:
+  # Code from module nl_langinfo:
+  # Code from module nl_langinfo-tests:
+  # Code from module nocrash:
+  # Code from module obstack:
+  # Code from module open:
+  # Code from module open-tests:
+  # Code from module openat:
+  # Code from module openat-die:
+  # Code from module openat-h:
+  # Code from module openat-safer:
+  # Code from module openat-safer-tests:
+  # Code from module openat-tests:
+  # Code from module opendir:
+  # Code from module opendirat:
+  # Code from module pathmax:
+  # Code from module pathmax-tests:
+  # Code from module perl:
+  # Code from module perror:
+  # Code from module perror-tests:
+  # Code from module pipe-posix:
+  # Code from module pipe-posix-tests:
+  # Code from module propername:
+  # Code from module pthread-h:
+  gl_ANYTHREADLIB_EARLY
+  # Code from module pthread-h-tests:
+  # Code from module pthread-thread:
+  # Code from module pthread-thread-tests:
+  # Code from module pthread_sigmask:
+  # Code from module pthread_sigmask-tests:
+  # Code from module putenv:
+  # Code from module quote:
+  # Code from module quotearg:
+  # Code from module quotearg-simple:
+  # Code from module quotearg-simple-tests:
+  # Code from module raise:
+  # Code from module raise-tests:
+  # Code from module rawmemchr:
+  # Code from module rawmemchr-tests:
+  # Code from module read:
+  # Code from module read-tests:
+  # Code from module readdir:
+  # Code from module readme-release:
+  # Code from module realloc-gnu:
+  # Code from module realloc-gnu-tests:
+  # Code from module realloc-posix:
+  # Code from module reallocarray:
+  # Code from module reallocarray-tests:
+  # Code from module regex:
+  # Code from module regex-tests:
+  # Code from module safe-read:
+  # Code from module same-inode:
+  # Code from module save-cwd:
+  # Code from module sched:
+  # Code from module sched-tests:
+  # Code from module select:
+  # Code from module select-tests:
+  # Code from module setenv:
+  # Code from module setenv-tests:
+  # Code from module setlocale:
+  # Code from module setlocale-null:
+  # Code from module setlocale-null-tests:
+  # Code from module setlocale-tests:
+  # Code from module setsockopt:
+  # Code from module setsockopt-tests:
+  # Code from module sigaction:
+  # Code from module sigaction-tests:
+  # Code from module signal-h:
+  # Code from module signal-h-tests:
+  # Code from module sigprocmask:
+  # Code from module sigprocmask-tests:
+  # Code from module sigsegv:
+  # Code from module sigsegv-tests:
+  # Code from module size_max:
+  # Code from module sleep:
+  # Code from module sleep-tests:
+  # Code from module snippet/_Noreturn:
+  # Code from module snippet/arg-nonnull:
+  # Code from module snippet/c++defs:
+  # Code from module snippet/warn-on-use:
+  # Code from module snprintf:
+  # Code from module snprintf-tests:
+  # Code from module socket:
+  # Code from module socketlib:
+  # Code from module sockets:
+  # Code from module sockets-tests:
+  # Code from module socklen:
+  # Code from module ssize_t:
+  # Code from module stat:
+  # Code from module stat-tests:
+  # Code from module stat-time:
+  # Code from module stat-time-tests:
+  # Code from module std-gnu11:
+  # Code from module stdalign:
+  # Code from module stdalign-tests:
+  # Code from module stdarg:
+  dnl Some compilers (e.g., AIX 5.3 cc) need to be in c99 mode
+  dnl for the builtin va_copy to work.  gl_PROG_CC_C99 arranges for this.
+  gl_PROG_CC_C99
+  # Code from module stdarg-tests:
+  # Code from module stdbool:
+  # Code from module stdbool-tests:
+  # Code from module stddef:
+  # Code from module stddef-tests:
+  # Code from module stdint:
+  # Code from module stdint-tests:
+  # Code from module stdio:
+  # Code from module stdio-tests:
+  # Code from module stdlib:
+  # Code from module stdlib-tests:
+  # Code from module stpcpy:
+  # Code from module strdup-posix:
+  # Code from module streq:
+  # Code from module strerror:
+  # Code from module strerror-override:
+  # Code from module strerror-tests:
+  # Code from module strerror_r-posix:
+  # Code from module strerror_r-posix-tests:
+  # Code from module striconv:
+  # Code from module striconv-tests:
+  # Code from module string:
+  # Code from module string-tests:
+  # Code from module strnlen:
+  # Code from module strnlen-tests:
+  # Code from module strnlen1:
+  # Code from module strstr:
+  # Code from module strstr-simple:
+  # Code from module strstr-tests:
+  # Code from module strtoimax:
+  # Code from module strtoimax-tests:
+  # Code from module strtoll:
+  # Code from module strtoll-tests:
+  # Code from module strtoull:
+  # Code from module strtoull-tests:
+  # Code from module strtoumax:
+  # Code from module strtoumax-tests:
+  # Code from module symlink:
+  # Code from module symlink-tests:
+  # Code from module sys_ioctl:
+  # Code from module sys_ioctl-tests:
+  # Code from module sys_select:
+  # Code from module sys_select-tests:
+  # Code from module sys_socket:
+  # Code from module sys_socket-tests:
+  # Code from module sys_stat:
+  # Code from module sys_stat-tests:
+  # Code from module sys_time:
+  # Code from module sys_time-tests:
+  # Code from module sys_types:
+  # Code from module sys_types-tests:
+  # Code from module sys_uio:
+  # Code from module sys_uio-tests:
+  # Code from module test-framework-sh:
+  # Code from module test-framework-sh-tests:
+  # Code from module thread:
+  # Code from module thread-optim:
+  # Code from module thread-tests:
+  # Code from module threadlib:
+  gl_THREADLIB_EARLY
+  # Code from module time:
+  # Code from module time-tests:
+  # Code from module trim:
+  # Code from module unistd:
+  # Code from module unistd-safer:
+  # Code from module unistd-safer-tests:
+  # Code from module unistd-tests:
+  # Code from module unistr/base:
+  # Code from module unistr/u8-mbtoucr:
+  # Code from module unistr/u8-mbtoucr-tests:
+  # Code from module unistr/u8-uctomb:
+  # Code from module unistr/u8-uctomb-tests:
+  # Code from module unitypes:
+  # Code from module uniwidth/base:
+  # Code from module uniwidth/width:
+  # Code from module uniwidth/width-tests:
+  # Code from module unlocked-io:
+  # Code from module unlocked-io-internal:
+  # Code from module unsetenv:
+  # Code from module unsetenv-tests:
+  # Code from module update-copyright:
+  # Code from module useless-if-before-free:
+  # Code from module vasnprintf:
+  # Code from module vasnprintf-tests:
+  # Code from module vc-list-files:
+  # Code from module vc-list-files-tests:
+  # Code from module verify:
+  # Code from module verify-tests:
+  # Code from module version-etc:
+  # Code from module version-etc-fsf:
+  # Code from module version-etc-tests:
+  # Code from module warnings:
+  # Code from module wchar:
+  # Code from module wchar-tests:
+  # Code from module wcrtomb:
+  # Code from module wcrtomb-tests:
+  # Code from module wctob:
+  # Code from module wctomb:
+  # Code from module wctype-h:
+  # Code from module wctype-h-tests:
+  # Code from module wcwidth:
+  # Code from module wcwidth-tests:
+  # Code from module windows-mutex:
+  # Code from module windows-once:
+  # Code from module windows-recmutex:
+  # Code from module windows-rwlock:
+  # Code from module windows-stat-inodes:
+  # Code from module windows-stat-override:
+  # Code from module windows-thread:
+  # Code from module windows-tls:
+  # Code from module wmemchr:
+  # Code from module wmempcpy:
+  # Code from module xalloc:
+  # Code from module xalloc-die:
+  # Code from module xalloc-die-tests:
+  # Code from module xalloc-oversized:
+  # Code from module xbinary-io:
+  # Code from module xsize:
+  # Code from module xstriconv:
+  # Code from module xstrtoimax:
+  # Code from module xstrtoimax-tests:
+  # Code from module xstrtol:
+  # Code from module xstrtol-error:
+  # Code from module xstrtol-tests:
+])
+
+# This macro should be invoked from ./configure.ac, in the section
+# "Check for header files, types and library functions".
+AC_DEFUN([gl_INIT],
+[
+  AM_CONDITIONAL([GL_COND_LIBTOOL], [false])
+  gl_cond_libtool=false
+  gl_libdeps=
+  gl_ltlibdeps=
+  gl_m4_base='m4'
+  m4_pushdef([AC_LIBOBJ], m4_defn([gl_LIBOBJ]))
+  m4_pushdef([AC_REPLACE_FUNCS], m4_defn([gl_REPLACE_FUNCS]))
+  m4_pushdef([AC_LIBSOURCES], m4_defn([gl_LIBSOURCES]))
+  m4_pushdef([gl_LIBSOURCES_LIST], [])
+  m4_pushdef([gl_LIBSOURCES_DIR], [])
+  m4_pushdef([GL_MACRO_PREFIX], [gl])
+  m4_pushdef([GL_MODULE_INDICATOR_PREFIX], [GL])
+  gl_COMMON
+  gl_source_base='lib'
+  gl_FUNC_ALLOCA
+  gl_ASSERT
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  gl_FUNC_BTOWC
+  if test $HAVE_BTOWC = 0 || test $REPLACE_BTOWC = 1; then
+    AC_LIBOBJ([btowc])
+    gl_PREREQ_BTOWC
+  fi
+  gl_WCHAR_MODULE_INDICATOR([btowc])
+  gl___BUILTIN_EXPECT
+  gl_C_STACK
+  gl_FUNC_CALLOC_GNU
+  if test $REPLACE_CALLOC = 1; then
+    AC_LIBOBJ([calloc])
+  fi
+  gl_FUNC_CALLOC_POSIX
+  if test $REPLACE_CALLOC = 1; then
+    AC_LIBOBJ([calloc])
+  fi
+  gl_STDLIB_MODULE_INDICATOR([calloc-posix])
+  gl_UNISTD_MODULE_INDICATOR([chdir])
+  gl_FUNC_CHDIR_LONG
+  if test $gl_cv_have_unlimited_file_name_length = no; then
+    AC_LIBOBJ([chdir-long])
+    gl_PREREQ_CHDIR_LONG
+  fi
+  gl_MODULE_INDICATOR_FOR_TESTS([cloexec])
+  gl_FUNC_CLOSE
+  if test $REPLACE_CLOSE = 1; then
+    AC_LIBOBJ([close])
+  fi
+  gl_UNISTD_MODULE_INDICATOR([close])
+  gl_MODULE_INDICATOR([close-stream])
+  gl_FUNC_CLOSEDIR
+  if test $HAVE_CLOSEDIR = 0 || test $REPLACE_CLOSEDIR = 1; then
+    AC_LIBOBJ([closedir])
+  fi
+  gl_DIRENT_MODULE_INDICATOR([closedir])
+  gl_CONFIGMAKE_PREP
+  gl_CTYPE_H
+  gl_CTYPE_H_REQUIRE_DEFAULTS
+  gl_CYCLE_CHECK
+  gl_CHECK_TYPE_STRUCT_DIRENT_D_INO
+  gl_CHECK_TYPE_STRUCT_DIRENT_D_TYPE
+  AC_REQUIRE([AC_C_INLINE])
+  gl_DIRENT_H
+  gl_DIRENT_H_REQUIRE_DEFAULTS
+  gl_FUNC_DIRFD
+  if test $ac_cv_func_dirfd = no && test $gl_cv_func_dirfd_macro = no \
+     || test $REPLACE_DIRFD = 1; then
+    AC_LIBOBJ([dirfd])
+    gl_PREREQ_DIRFD
+  fi
+  gl_DIRENT_MODULE_INDICATOR([dirfd])
+  gl_DOUBLE_SLASH_ROOT
+  gl_FUNC_DUP
+  if test $REPLACE_DUP = 1; then
+    AC_LIBOBJ([dup])
+    gl_PREREQ_DUP
+  fi
+  gl_UNISTD_MODULE_INDICATOR([dup])
+  gl_FUNC_DUP2
+  if test $REPLACE_DUP2 = 1; then
+    AC_LIBOBJ([dup2])
+    gl_PREREQ_DUP2
+  fi
+  gl_UNISTD_MODULE_INDICATOR([dup2])
+  AC_PROG_MKDIR_P
+  gl_HEADER_ERRNO_H
+  gl_ERROR
+  if test $ac_cv_lib_error_at_line = no; then
+    AC_LIBOBJ([error])
+    gl_PREREQ_ERROR
+  fi
+  m4_ifdef([AM_XGETTEXT_OPTION],
+    [AM_][XGETTEXT_OPTION([--flag=error:3:c-format])
+     AM_][XGETTEXT_OPTION([--flag=error_at_line:5:c-format])])
+  AC_REQUIRE([gl_EXTERN_INLINE])
+  gl_FUNC_FCHDIR
+  gl_UNISTD_MODULE_INDICATOR([fchdir])
+  gl_FUNC_FCNTL
+  if test $HAVE_FCNTL = 0 || test $REPLACE_FCNTL = 1; then
+    AC_LIBOBJ([fcntl])
+  fi
+  gl_FCNTL_MODULE_INDICATOR([fcntl])
+  gl_FCNTL_H
+  gl_FCNTL_H_REQUIRE_DEFAULTS
+  gl_FCNTL_SAFER
+  gl_MODULE_INDICATOR([fcntl-safer])
+  gl_MODULE_INDICATOR([fd-safer-flag])
+  gl_FUNC_FDOPENDIR
+  if test $HAVE_FDOPENDIR = 0 || test $REPLACE_FDOPENDIR = 1; then
+    AC_LIBOBJ([fdopendir])
+  fi
+  gl_DIRENT_MODULE_INDICATOR([fdopendir])
+  gl_MODULE_INDICATOR([fdopendir])
+  gl_FILE_NAME_CONCAT_LGPL
+  AC_C_FLEXIBLE_ARRAY_MEMBER
+  gl_FUNC_FNMATCH_POSIX
+  if test $HAVE_FNMATCH = 0 || test $REPLACE_FNMATCH = 1; then
+    AC_LIBOBJ([fnmatch])
+    gl_PREREQ_FNMATCH
+  fi
+  gl_FNMATCH_MODULE_INDICATOR([fnmatch])
+  gl_FNMATCH_H
+  gl_FNMATCH_H_REQUIRE_DEFAULTS
+  gl_FUNC_FOPEN
+  if test $REPLACE_FOPEN = 1; then
+    AC_LIBOBJ([fopen])
+    gl_PREREQ_FOPEN
+  fi
+  gl_STDIO_MODULE_INDICATOR([fopen])
+  gl_FUNC_FOPEN_GNU
+  if test $REPLACE_FOPEN = 1; then
+    AC_LIBOBJ([fopen])
+    gl_PREREQ_FOPEN
+  fi
+  gl_MODULE_INDICATOR([fopen-gnu])
+  gl_FUNC_FPENDING
+  if test $gl_cv_func___fpending = no; then
+    AC_LIBOBJ([fpending])
+  fi
+  gl_FUNC_FREE
+  if test $REPLACE_FREE = 1; then
+    AC_LIBOBJ([free])
+    gl_PREREQ_FREE
+  fi
+  gl_STDLIB_MODULE_INDICATOR([free-posix])
+  gl_FUNC_FSTAT
+  if test $REPLACE_FSTAT = 1; then
+    AC_LIBOBJ([fstat])
+    case "$host_os" in
+      mingw*)
+        AC_LIBOBJ([stat-w32])
+        ;;
+    esac
+    gl_PREREQ_FSTAT
+  fi
+  gl_SYS_STAT_MODULE_INDICATOR([fstat])
+  gl_FUNC_FSTATAT
+  if test $HAVE_FSTATAT = 0 || test $REPLACE_FSTATAT = 1; then
+    AC_LIBOBJ([fstatat])
+  fi
+  gl_SYS_STAT_MODULE_INDICATOR([fstatat])
+  gl_FUNC_FTS
+  dnl Use this version of fts unconditionally, since the GNU libc and
+  dnl NetBSD versions have bugs and/or unnecessary limitations.
+  AC_LIBOBJ([fts])
+  gl_FUNC_GETCWD_LGPL
+  if test $REPLACE_GETCWD = 1; then
+    AC_LIBOBJ([getcwd-lgpl])
+  fi
+  gl_UNISTD_MODULE_INDICATOR([getcwd])
+  gl_FUNC_GETDTABLESIZE
+  if test $HAVE_GETDTABLESIZE = 0 || test $REPLACE_GETDTABLESIZE = 1; then
+    AC_LIBOBJ([getdtablesize])
+    gl_PREREQ_GETDTABLESIZE
+  fi
+  gl_UNISTD_MODULE_INDICATOR([getdtablesize])
+  gl_FUNC_GETOPT_GNU
+  dnl Because of the way gl_FUNC_GETOPT_GNU is implemented (the gl_getopt_required
+  dnl mechanism), there is no need to do any AC_LIBOBJ or AC_SUBST here; they are
+  dnl done in the getopt-posix module.
+  gl_FUNC_GETOPT_POSIX
+  if test $REPLACE_GETOPT = 1; then
+    AC_LIBOBJ([getopt])
+    AC_LIBOBJ([getopt1])
+    dnl Define the substituted variable GNULIB_UNISTD_H_GETOPT to 1.
+    gl_UNISTD_H_REQUIRE_DEFAULTS
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_UNISTD_H_GETOPT], [1])
+  fi
+  gl_UNISTD_MODULE_INDICATOR([getopt-posix])
+  gl_FUNC_GETPAGESIZE
+  if test $REPLACE_GETPAGESIZE = 1; then
+    AC_LIBOBJ([getpagesize])
+  fi
+  gl_UNISTD_MODULE_INDICATOR([getpagesize])
+  gl_FUNC_GETPROGNAME
+  AC_SUBST([LIBINTL])
+  AC_SUBST([LTLIBINTL])
+  # Autoconf 2.61a.99 and earlier don't support linking a file only
+  # in VPATH builds.  But since GNUmakefile is for maintainer use
+  # only, it does not matter if we skip the link with older autoconf.
+  # Automake 1.10.1 and earlier try to remove GNUmakefile in non-VPATH
+  # builds, so use a shell variable to bypass this.
+  GNUmakefile=GNUmakefile
+  m4_if(m4_version_compare([2.61a.100],
+          m4_defn([m4_PACKAGE_VERSION])), [1], [],
+        [AC_CONFIG_LINKS([$GNUmakefile:$GNUmakefile], [],
+          [GNUmakefile=$GNUmakefile])])
+  AC_REQUIRE([gl_FUNC_SETLOCALE_NULL])
+  LIB_HARD_LOCALE="$LIB_SETLOCALE_NULL"
+  AC_SUBST([LIB_HARD_LOCALE])
+  AC_DEFUN([gl_HAVE_MODULE_HAVELIB])
+  AC_REQUIRE([gl_HOST_CPU_C_ABI])
+  gl_I_RING
+  AM_ICONV
+  m4_ifdef([gl_ICONV_MODULE_INDICATOR],
+    [gl_ICONV_MODULE_INDICATOR([iconv])])
+  gl_ICONV_H
+  gl_ICONV_H_REQUIRE_DEFAULTS
+  gl_FUNC_ICONV_OPEN
+  if test $REPLACE_ICONV_OPEN = 1; then
+    AC_LIBOBJ([iconv_open])
+  fi
+  if test $REPLACE_ICONV = 1; then
+    AC_LIBOBJ([iconv])
+    AC_LIBOBJ([iconv_close])
+  fi
+  gl_INLINE
+  gl_INTTYPES_H
+  gl_INTTYPES_INCOMPLETE
+  gl_INTTYPES_H_REQUIRE_DEFAULTS
+  gl_FUNC_ISATTY
+  if test $REPLACE_ISATTY = 1; then
+    AC_LIBOBJ([isatty])
+    gl_PREREQ_ISATTY
+  fi
+  gl_UNISTD_MODULE_INDICATOR([isatty])
+  gl_FUNC_ISBLANK
+  if test $HAVE_ISBLANK = 0; then
+    AC_LIBOBJ([isblank])
+  fi
+  gl_MODULE_INDICATOR([isblank])
+  gl_CTYPE_MODULE_INDICATOR([isblank])
+  gl_FUNC_ISWBLANK
+  if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
+    :
+  else
+    if test $HAVE_ISWBLANK = 0 || test $REPLACE_ISWBLANK = 1; then
+      AC_LIBOBJ([iswblank])
+    fi
+  fi
+  gl_WCTYPE_MODULE_INDICATOR([iswblank])
+  gl_FUNC_ISWCTYPE
+  if test $HAVE_WCTYPE_T = 0 || test $GNULIBHEADERS_OVERRIDE_WINT_T = 1; then
+    AC_LIBOBJ([iswctype])
+  fi
+  gl_WCTYPE_MODULE_INDICATOR([iswctype])
+  gl_FUNC_ISWDIGIT
+  if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
+    :
+  else
+    if test $REPLACE_ISWDIGIT = 1; then
+      AC_LIBOBJ([iswdigit])
+    fi
+  fi
+  gl_WCTYPE_MODULE_INDICATOR([iswdigit])
+  gl_FUNC_ISWXDIGIT
+  if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
+    :
+  else
+    if test $REPLACE_ISWXDIGIT = 1; then
+      AC_LIBOBJ([iswxdigit])
+    fi
+  fi
+  gl_WCTYPE_MODULE_INDICATOR([iswxdigit])
+  gl_LANGINFO_H
+  gl_LANGINFO_H_REQUIRE_DEFAULTS
+  AC_REQUIRE([gl_LARGEFILE])
+  gl___INLINE
+  gl_LIMITS_H
+  gl_LOCALCHARSET
+  dnl For backward compatibility. Some packages still use this.
+  LOCALCHARSET_TESTS_ENVIRONMENT=
+  AC_SUBST([LOCALCHARSET_TESTS_ENVIRONMENT])
+  gl_LOCALE_H
+  gl_LOCALE_H_REQUIRE_DEFAULTS
+  gl_FUNC_LOCALECONV
+  if test $REPLACE_LOCALECONV = 1; then
+    AC_LIBOBJ([localeconv])
+    gl_PREREQ_LOCALECONV
+  fi
+  gl_LOCALE_MODULE_INDICATOR([localeconv])
+  gl_LOCK
+  gl_MODULE_INDICATOR([lock])
+  gl_FUNC_LSEEK
+  if test $REPLACE_LSEEK = 1; then
+    AC_LIBOBJ([lseek])
+  fi
+  gl_UNISTD_MODULE_INDICATOR([lseek])
+  gl_FUNC_LSTAT
+  if test $REPLACE_LSTAT = 1; then
+    AC_LIBOBJ([lstat])
+    gl_PREREQ_LSTAT
+  fi
+  gl_SYS_STAT_MODULE_INDICATOR([lstat])
+  AC_CONFIG_COMMANDS_PRE([m4_ifdef([AH_HEADER],
+    [AC_SUBST([CONFIG_INCLUDE], m4_defn([AH_HEADER]))])])
+  AC_REQUIRE([AC_PROG_SED])
+  AC_REQUIRE([AC_PROG_GREP])
+  gl_FUNC_MALLOC_GNU
+  if test $REPLACE_MALLOC = 1; then
+    AC_LIBOBJ([malloc])
+  fi
+  AC_REQUIRE([gl_FUNC_MALLOC_POSIX])
+  if test $REPLACE_MALLOC = 1; then
+    AC_LIBOBJ([malloc])
+  fi
+  gl_STDLIB_MODULE_INDICATOR([malloc-posix])
+  gl_MALLOCA
+  gl_MBCHAR
+  gl_MBITER
+  gl_FUNC_MBRLEN
+  if test $HAVE_MBRLEN = 0 || test $REPLACE_MBRLEN = 1; then
+    AC_LIBOBJ([mbrlen])
+    gl_PREREQ_MBRLEN
+  fi
+  gl_WCHAR_MODULE_INDICATOR([mbrlen])
+  gl_FUNC_MBRTOWC
+  if test $HAVE_MBRTOWC = 0 || test $REPLACE_MBRTOWC = 1; then
+    AC_LIBOBJ([mbrtowc])
+    if test $REPLACE_MBSTATE_T = 1; then
+      AC_LIBOBJ([lc-charset-dispatch])
+      AC_LIBOBJ([mbtowc-lock])
+      gl_PREREQ_MBTOWC_LOCK
+    fi
+    gl_PREREQ_MBRTOWC
+  fi
+  gl_WCHAR_MODULE_INDICATOR([mbrtowc])
+  gl_STRING_MODULE_INDICATOR([mbscasecmp])
+  gl_FUNC_MBSINIT
+  if test $HAVE_MBSINIT = 0 || test $REPLACE_MBSINIT = 1; then
+    AC_LIBOBJ([mbsinit])
+    gl_PREREQ_MBSINIT
+  fi
+  gl_WCHAR_MODULE_INDICATOR([mbsinit])
+  gl_FUNC_MBSLEN
+  gl_STRING_MODULE_INDICATOR([mbslen])
+  gl_FUNC_MBSRTOWCS
+  if test $HAVE_MBSRTOWCS = 0 || test $REPLACE_MBSRTOWCS = 1; then
+    AC_LIBOBJ([mbsrtowcs])
+    AC_LIBOBJ([mbsrtowcs-state])
+    gl_PREREQ_MBSRTOWCS
+  fi
+  gl_WCHAR_MODULE_INDICATOR([mbsrtowcs])
+  gl_STRING_MODULE_INDICATOR([mbsstr])
+  gl_FUNC_MBTOWC
+  if test $HAVE_MBTOWC = 0 || test $REPLACE_MBTOWC = 1; then
+    AC_LIBOBJ([mbtowc])
+    gl_PREREQ_MBTOWC
+  fi
+  gl_STDLIB_MODULE_INDICATOR([mbtowc])
+  gl_MBITER
+  gl_FUNC_MEMCHR
+  if test $REPLACE_MEMCHR = 1; then
+    AC_LIBOBJ([memchr])
+    gl_PREREQ_MEMCHR
+  fi
+  gl_STRING_MODULE_INDICATOR([memchr])
+  gl_FUNC_MEMPCPY
+  if test $HAVE_MEMPCPY = 0; then
+    AC_LIBOBJ([mempcpy])
+    gl_PREREQ_MEMPCPY
+  fi
+  gl_STRING_MODULE_INDICATOR([mempcpy])
+  gl_FUNC_MEMRCHR
+  if test $ac_cv_func_memrchr = no; then
+    AC_LIBOBJ([memrchr])
+    gl_PREREQ_MEMRCHR
+  fi
+  gl_STRING_MODULE_INDICATOR([memrchr])
+  gl_MINMAX
+  AC_REQUIRE([gl_MSVC_INVAL])
+  if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+    AC_LIBOBJ([msvc-inval])
+  fi
+  AC_REQUIRE([gl_MSVC_NOTHROW])
+  if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+    AC_LIBOBJ([msvc-nothrow])
+  fi
+  gl_MODULE_INDICATOR([msvc-nothrow])
+  gl_MULTIARCH
+  gl_FUNC_NL_LANGINFO
+  if test $HAVE_NL_LANGINFO = 0 || test $REPLACE_NL_LANGINFO = 1; then
+    AC_LIBOBJ([nl_langinfo])
+  fi
+  if test $REPLACE_NL_LANGINFO = 1 && test $NL_LANGINFO_MTSAFE = 0; then
+    AC_LIBOBJ([nl_langinfo-lock])
+    gl_PREREQ_NL_LANGINFO_LOCK
+  fi
+  gl_LANGINFO_MODULE_INDICATOR([nl_langinfo])
+  AC_FUNC_OBSTACK
+  dnl Note: AC_FUNC_OBSTACK does AC_LIBSOURCES([obstack.h, obstack.c]).
+  gl_FUNC_OPEN
+  if test $REPLACE_OPEN = 1; then
+    AC_LIBOBJ([open])
+    gl_PREREQ_OPEN
+  fi
+  gl_FCNTL_MODULE_INDICATOR([open])
+  gl_FUNC_OPENAT
+  if test $HAVE_OPENAT = 0 || test $REPLACE_OPENAT = 1; then
+    AC_LIBOBJ([openat])
+    gl_PREREQ_OPENAT
+  fi
+  gl_MODULE_INDICATOR([openat]) dnl for lib/getcwd.c
+  gl_FCNTL_MODULE_INDICATOR([openat])
+  gl_OPENAT_SAFER
+  gl_MODULE_INDICATOR([openat-safer])
+  gl_FUNC_OPENDIR
+  if test $HAVE_OPENDIR = 0 || test $REPLACE_OPENDIR = 1; then
+    AC_LIBOBJ([opendir])
+  fi
+  gl_DIRENT_MODULE_INDICATOR([opendir])
+  gl_PATHMAX
+  gl_PERL
+  gl_FUNC_PIPE
+  if test $HAVE_PIPE = 0; then
+    AC_LIBOBJ([pipe])
+  fi
+  gl_UNISTD_MODULE_INDICATOR([pipe])
+  m4_ifdef([AM_XGETTEXT_OPTION],
+    [AM_][XGETTEXT_OPTION([--keyword='proper_name:1,\"This is a proper name. See the gettext manual, section Names.\"'])
+     AM_][XGETTEXT_OPTION([--keyword='proper_name_utf8:1,\"This is a proper name. See the gettext manual, section Names.\"'])])
+  gl_QUOTE
+  gl_QUOTEARG
+  gl_FUNC_RAISE
+  if test $HAVE_RAISE = 0 || test $REPLACE_RAISE = 1; then
+    AC_LIBOBJ([raise])
+    gl_PREREQ_RAISE
+  fi
+  gl_SIGNAL_MODULE_INDICATOR([raise])
+  gl_FUNC_RAWMEMCHR
+  if test $HAVE_RAWMEMCHR = 0; then
+    AC_LIBOBJ([rawmemchr])
+    gl_PREREQ_RAWMEMCHR
+  fi
+  gl_STRING_MODULE_INDICATOR([rawmemchr])
+  gl_FUNC_READ
+  if test $REPLACE_READ = 1; then
+    AC_LIBOBJ([read])
+    gl_PREREQ_READ
+  fi
+  gl_UNISTD_MODULE_INDICATOR([read])
+  gl_FUNC_READDIR
+  if test $HAVE_READDIR = 0; then
+    AC_LIBOBJ([readdir])
+  fi
+  gl_DIRENT_MODULE_INDICATOR([readdir])
+  gl_FUNC_REALLOC_GNU
+  if test $REPLACE_REALLOC = 1; then
+    AC_LIBOBJ([realloc])
+  fi
+  gl_FUNC_REALLOC_POSIX
+  if test $REPLACE_REALLOC = 1; then
+    AC_LIBOBJ([realloc])
+  fi
+  gl_STDLIB_MODULE_INDICATOR([realloc-posix])
+  gl_FUNC_REALLOCARRAY
+  if test $HAVE_REALLOCARRAY = 0 || test $REPLACE_REALLOCARRAY = 1; then
+    AC_LIBOBJ([reallocarray])
+    gl_PREREQ_REALLOCARRAY
+  fi
+  gl_MODULE_INDICATOR([reallocarray])
+  gl_STDLIB_MODULE_INDICATOR([reallocarray])
+  gl_REGEX
+  if test $ac_use_included_regex = yes; then
+    AC_LIBOBJ([regex])
+    gl_PREREQ_REGEX
+  fi
+  gl_PREREQ_SAFE_READ
+  gl_SAVE_CWD
+  gl_FUNC_SETLOCALE_NULL
+  if test $SETLOCALE_NULL_ALL_MTSAFE = 0 || test $SETLOCALE_NULL_ONE_MTSAFE = 0; then
+    AC_LIBOBJ([setlocale-lock])
+    gl_PREREQ_SETLOCALE_LOCK
+  fi
+  gl_LOCALE_MODULE_INDICATOR([setlocale_null])
+  gl_SIGNAL_H
+  gl_SIGNAL_H_REQUIRE_DEFAULTS
+  AC_ARG_WITH([libsigsegv],
+    [AS_HELP_STRING([--with-libsigsegv],
+       [use the GNU libsigsegv library, when present, instead of the gnulib module 'sigsegv'])])
+  SIGSEGV_H=sigsegv.h
+  if test "$with_libsigsegv" = yes; then
+    gl_LIBSIGSEGV
+    if test "$gl_cv_lib_sigsegv" = yes; then
+      SIGSEGV_H=
+    fi
+  fi
+  AC_SUBST([SIGSEGV_H])
+  AM_CONDITIONAL([GL_GENERATE_SIGSEGV_H], [test -n "$SIGSEGV_H"])
+  if test -n "$SIGSEGV_H"; then
+    dnl Persuade glibc <sys/ucontext.h> to declare macros designating register
+    dnl indices: REG_RSP on x86_64, REG_ESP on i386.
+    dnl Persuade Solaris OpenIndiana <ucontext.h> to include <sys/regset.h>,
+    dnl which declares macros designating register indices, such as ESP on i386.
+    dnl Persuade Solaris OpenIndiana <unistd.h> to declare mincore().
+    AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+    AC_REQUIRE([AC_CANONICAL_HOST])
+    case "$host_os" in
+      solaris2.11)
+        AC_DEFINE([SOLARIS11], [1], [Define on Solaris 11 and its derivates.])
+        ;;
+    esac
+    gl_FUNC_MMAP_ANON
+    dnl Stack direction.
+    SV_STACK_DIRECTION
+    dnl Catching stack overflow requires an alternate signal stack.
+    dnl The old "install a guard page" trick would be unreliable, because
+    dnl we don't know where exactly to place the guard page.
+    SV_SIGALTSTACK
+    AC_CHECK_FUNCS_ONCE([getrlimit])
+  fi
+  gt_TYPE_SSIZE_T
+  gl_FUNC_STAT
+  if test $REPLACE_STAT = 1; then
+    AC_LIBOBJ([stat])
+    case "$host_os" in
+      mingw*)
+        AC_LIBOBJ([stat-w32])
+        ;;
+    esac
+    gl_PREREQ_STAT
+  fi
+  gl_SYS_STAT_MODULE_INDICATOR([stat])
+  gl_STAT_TIME
+  gl_STAT_BIRTHTIME
+  gl_STDALIGN_H
+  gl_STDARG_H
+  AM_STDBOOL_H
+  gl_STDDEF_H
+  gl_STDDEF_H_REQUIRE_DEFAULTS
+  gl_STDINT_H
+  gl_STDIO_H
+  gl_STDIO_H_REQUIRE_DEFAULTS
+  dnl No need to create extra modules for these functions. Everyone who uses
+  dnl <stdio.h> likely needs them.
+  gl_STDIO_MODULE_INDICATOR([fscanf])
+  gl_MODULE_INDICATOR([fscanf])
+  gl_STDIO_MODULE_INDICATOR([scanf])
+  gl_MODULE_INDICATOR([scanf])
+  gl_STDIO_MODULE_INDICATOR([fgetc])
+  gl_STDIO_MODULE_INDICATOR([getc])
+  gl_STDIO_MODULE_INDICATOR([getchar])
+  gl_STDIO_MODULE_INDICATOR([fgets])
+  gl_STDIO_MODULE_INDICATOR([fread])
+  dnl No need to create extra modules for these functions. Everyone who uses
+  dnl <stdio.h> likely needs them.
+  gl_STDIO_MODULE_INDICATOR([fprintf])
+  gl_STDIO_MODULE_INDICATOR([printf])
+  gl_STDIO_MODULE_INDICATOR([vfprintf])
+  gl_STDIO_MODULE_INDICATOR([vprintf])
+  gl_STDIO_MODULE_INDICATOR([fputc])
+  gl_STDIO_MODULE_INDICATOR([putc])
+  gl_STDIO_MODULE_INDICATOR([putchar])
+  gl_STDIO_MODULE_INDICATOR([fputs])
+  gl_STDIO_MODULE_INDICATOR([puts])
+  gl_STDIO_MODULE_INDICATOR([fwrite])
+  gl_STDLIB_H
+  gl_STDLIB_H_REQUIRE_DEFAULTS
+  gl_FUNC_STPCPY
+  if test $HAVE_STPCPY = 0; then
+    AC_LIBOBJ([stpcpy])
+    gl_PREREQ_STPCPY
+  fi
+  gl_STRING_MODULE_INDICATOR([stpcpy])
+  gl_FUNC_STRDUP_POSIX
+  if test $REPLACE_STRDUP = 1; then
+    AC_LIBOBJ([strdup])
+    gl_PREREQ_STRDUP
+  fi
+  gl_STRING_MODULE_INDICATOR([strdup])
+  gl_FUNC_STRERROR
+  if test $REPLACE_STRERROR = 1; then
+    AC_LIBOBJ([strerror])
+  fi
+  gl_MODULE_INDICATOR([strerror])
+  gl_STRING_MODULE_INDICATOR([strerror])
+  AC_REQUIRE([gl_HEADER_ERRNO_H])
+  AC_REQUIRE([gl_FUNC_STRERROR_0])
+  if test -n "$ERRNO_H" || test $REPLACE_STRERROR_0 = 1; then
+    AC_LIBOBJ([strerror-override])
+    gl_PREREQ_SYS_H_WINSOCK2
+  fi
+  if test $gl_cond_libtool = false; then
+    gl_ltlibdeps="$gl_ltlibdeps $LTLIBICONV"
+    gl_libdeps="$gl_libdeps $LIBICONV"
+  fi
+  gl_STRING_H
+  gl_STRING_H_REQUIRE_DEFAULTS
+  gl_FUNC_STRNLEN
+  if test $HAVE_DECL_STRNLEN = 0 || test $REPLACE_STRNLEN = 1; then
+    AC_LIBOBJ([strnlen])
+    gl_PREREQ_STRNLEN
+  fi
+  gl_STRING_MODULE_INDICATOR([strnlen])
+  gl_FUNC_STRSTR
+  if test $REPLACE_STRSTR = 1; then
+    AC_LIBOBJ([strstr])
+  fi
+  gl_FUNC_STRSTR_SIMPLE
+  if test $REPLACE_STRSTR = 1; then
+    AC_LIBOBJ([strstr])
+  fi
+  gl_STRING_MODULE_INDICATOR([strstr])
+  gl_FUNC_STRTOIMAX
+  if test $HAVE_DECL_STRTOIMAX = 0 || test $REPLACE_STRTOIMAX = 1; then
+    AC_LIBOBJ([strtoimax])
+    gl_PREREQ_STRTOIMAX
+  fi
+  gl_INTTYPES_MODULE_INDICATOR([strtoimax])
+  gl_FUNC_STRTOLL
+  if test $HAVE_STRTOLL = 0 || test $REPLACE_STRTOLL = 1; then
+    AC_LIBOBJ([strtoll])
+    gl_PREREQ_STRTOLL
+  fi
+  gl_STDLIB_MODULE_INDICATOR([strtoll])
+  gl_FUNC_STRTOULL
+  if test $HAVE_STRTOULL = 0 || test $REPLACE_STRTOULL = 1; then
+    AC_LIBOBJ([strtoull])
+    gl_PREREQ_STRTOULL
+  fi
+  gl_STDLIB_MODULE_INDICATOR([strtoull])
+  gl_FUNC_STRTOUMAX
+  if test $HAVE_DECL_STRTOUMAX = 0 || test $REPLACE_STRTOUMAX = 1; then
+    AC_LIBOBJ([strtoumax])
+    gl_PREREQ_STRTOUMAX
+  fi
+  gl_INTTYPES_MODULE_INDICATOR([strtoumax])
+  gl_SYS_STAT_H
+  gl_SYS_STAT_H_REQUIRE_DEFAULTS
+  AC_PROG_MKDIR_P
+  gl_SYS_TYPES_H
+  gl_SYS_TYPES_H_REQUIRE_DEFAULTS
+  AC_PROG_MKDIR_P
+  AC_REQUIRE([gl_THREADLIB])
+  gl_TIME_H
+  gl_TIME_H_REQUIRE_DEFAULTS
+  gl_UNISTD_H
+  gl_UNISTD_H_REQUIRE_DEFAULTS
+  gl_UNISTD_SAFER
+  gl_LIBUNISTRING_LIBHEADER([0.9.11], [unistr.h])
+  gl_MODULE_INDICATOR([unistr/u8-mbtoucr])
+  gl_LIBUNISTRING_MODULE([0.9], [unistr/u8-mbtoucr])
+  gl_MODULE_INDICATOR([unistr/u8-uctomb])
+  gl_LIBUNISTRING_MODULE([0.9], [unistr/u8-uctomb])
+  gl_LIBUNISTRING_LIBHEADER([0.9.11], [unitypes.h])
+  AH_VERBATIM([unitypes_restrict], [
+  /* This definition is a duplicate of the one in unitypes.h.
+     It is here so that we can cope with an older version of unitypes.h
+     that does not contain this definition and that is pre-installed among
+     the public header files.  */
+  # if defined __restrict \
+       || 2 < __GNUC__ + (95 <= __GNUC_MINOR__) \
+       || __clang_major__ >= 3
+  #  define _UC_RESTRICT __restrict
+  # elif 199901L <= __STDC_VERSION__ || defined restrict
+  #  define _UC_RESTRICT restrict
+  # else
+  #  define _UC_RESTRICT
+  # endif
+  ])
+  gl_LIBUNISTRING_LIBHEADER([0.9.11], [uniwidth.h])
+  gl_LIBUNISTRING_MODULE([0.9.8], [uniwidth/width])
+  AC_DEFINE([GNULIB_STDIO_SINGLE_THREAD], [1],
+    [Define to 1 if you want the FILE stream functions getc, putc, etc.
+     to use unlocked I/O if available, throughout the package.
+     Unlocked I/O can improve performance, sometimes dramatically.
+     But unlocked I/O is safe only in single-threaded programs,
+     as well as in multithreaded programs for which you can guarantee that
+     every FILE stream, including stdin, stdout, stderr, is used only
+     in a single thread.])
+  AC_DEFINE([USE_UNLOCKED_IO], [GNULIB_STDIO_SINGLE_THREAD],
+    [An alias of GNULIB_STDIO_SINGLE_THREAD.])
+  gl_FUNC_GLIBC_UNLOCKED_IO
+  gl_VERSION_ETC
+  gl_WCHAR_H
+  gl_WCHAR_H_REQUIRE_DEFAULTS
+  gl_FUNC_WCRTOMB
+  if test $HAVE_WCRTOMB = 0 || test $REPLACE_WCRTOMB = 1; then
+    AC_LIBOBJ([wcrtomb])
+    gl_PREREQ_WCRTOMB
+  fi
+  gl_WCHAR_MODULE_INDICATOR([wcrtomb])
+  gl_FUNC_WCTOB
+  if test $HAVE_WCTOB = 0 || test $REPLACE_WCTOB = 1; then
+    AC_LIBOBJ([wctob])
+    gl_PREREQ_WCTOB
+  fi
+  gl_WCHAR_MODULE_INDICATOR([wctob])
+  gl_FUNC_WCTOMB
+  if test $REPLACE_WCTOMB = 1; then
+    AC_LIBOBJ([wctomb])
+    gl_PREREQ_WCTOMB
+  fi
+  gl_STDLIB_MODULE_INDICATOR([wctomb])
+  gl_WCTYPE_H
+  gl_WCTYPE_H_REQUIRE_DEFAULTS
+  gl_FUNC_WCWIDTH
+  if test $HAVE_WCWIDTH = 0 || test $REPLACE_WCWIDTH = 1; then
+    AC_LIBOBJ([wcwidth])
+    gl_PREREQ_WCWIDTH
+  fi
+  gl_WCHAR_MODULE_INDICATOR([wcwidth])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  case "$host_os" in
+    mingw*)
+      AC_LIBOBJ([windows-mutex])
+      ;;
+  esac
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  case "$host_os" in
+    mingw*)
+      AC_LIBOBJ([windows-once])
+      ;;
+  esac
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  case "$host_os" in
+    mingw*)
+      AC_LIBOBJ([windows-recmutex])
+      ;;
+  esac
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  case "$host_os" in
+    mingw*)
+      AC_LIBOBJ([windows-rwlock])
+      ;;
+  esac
+  AC_REQUIRE([gl_WINDOWS_STAT_INODES])
+  gl_SYS_STAT_H_REQUIRE_DEFAULTS
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  case "$host_os" in
+    mingw*) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_OVERRIDES_STRUCT_STAT], [1]) ;;
+  esac
+  gl_FUNC_WMEMCHR
+  if test $HAVE_WMEMCHR = 0; then
+    AC_LIBOBJ([wmemchr])
+  fi
+  gl_WCHAR_MODULE_INDICATOR([wmemchr])
+  gl_FUNC_WMEMPCPY
+  if test $HAVE_WMEMPCPY = 0; then
+    AC_LIBOBJ([wmempcpy])
+  fi
+  gl_WCHAR_MODULE_INDICATOR([wmempcpy])
+  gl_XALLOC
+  gl_MODULE_INDICATOR([xalloc])
+  gl_MODULE_INDICATOR([xalloc-die])
+  gl_XSTRTOL
+  # End of code from modules
+  m4_ifval(gl_LIBSOURCES_LIST, [
+    m4_syscmd([test ! -d ]m4_defn([gl_LIBSOURCES_DIR])[ ||
+      for gl_file in ]gl_LIBSOURCES_LIST[ ; do
+        if test ! -r ]m4_defn([gl_LIBSOURCES_DIR])[/$gl_file ; then
+          echo "missing file ]m4_defn([gl_LIBSOURCES_DIR])[/$gl_file" >&2
+          exit 1
+        fi
+      done])dnl
+      m4_if(m4_sysval, [0], [],
+        [AC_FATAL([expected source file, required through AC_LIBSOURCES, not found])])
+  ])
+  m4_popdef([GL_MODULE_INDICATOR_PREFIX])
+  m4_popdef([GL_MACRO_PREFIX])
+  m4_popdef([gl_LIBSOURCES_DIR])
+  m4_popdef([gl_LIBSOURCES_LIST])
+  m4_popdef([AC_LIBSOURCES])
+  m4_popdef([AC_REPLACE_FUNCS])
+  m4_popdef([AC_LIBOBJ])
+  AC_CONFIG_COMMANDS_PRE([
+    gl_libobjs=
+    gl_ltlibobjs=
+    if test -n "$gl_LIBOBJS"; then
+      # Remove the extension.
+      sed_drop_objext='s/\.o$//;s/\.obj$//'
+      for i in `for i in $gl_LIBOBJS; do echo "$i"; done | sed -e "$sed_drop_objext" | sort | uniq`; do
+        gl_libobjs="$gl_libobjs $i.$ac_objext"
+        gl_ltlibobjs="$gl_ltlibobjs $i.lo"
+      done
+    fi
+    AC_SUBST([gl_LIBOBJS], [$gl_libobjs])
+    AC_SUBST([gl_LTLIBOBJS], [$gl_ltlibobjs])
+  ])
+  gltests_libdeps=
+  gltests_ltlibdeps=
+  m4_pushdef([AC_LIBOBJ], m4_defn([gltests_LIBOBJ]))
+  m4_pushdef([AC_REPLACE_FUNCS], m4_defn([gltests_REPLACE_FUNCS]))
+  m4_pushdef([AC_LIBSOURCES], m4_defn([gltests_LIBSOURCES]))
+  m4_pushdef([gltests_LIBSOURCES_LIST], [])
+  m4_pushdef([gltests_LIBSOURCES_DIR], [])
+  m4_pushdef([GL_MACRO_PREFIX], [gltests])
+  m4_pushdef([GL_MODULE_INDICATOR_PREFIX], [GL])
+  gl_COMMON
+  AC_REQUIRE([gl_CC_ALLOW_WARNINGS])
+  AC_REQUIRE([gl_CXX_ALLOW_WARNINGS])
+  gl_source_base='gnulib-tests'
+changequote(,)dnl
+  gltests_WITNESS=IN_`echo "${PACKAGE-$PACKAGE_TARNAME}" | LC_ALL=C tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ | LC_ALL=C sed -e 's/[^A-Z0-9_]/_/g'`_GNULIB_TESTS
+changequote([, ])dnl
+  AC_SUBST([gltests_WITNESS])
+  gl_module_indicator_condition=$gltests_WITNESS
+  m4_pushdef([gl_MODULE_INDICATOR_CONDITION], [$gl_module_indicator_condition])
+  AC_REQUIRE([gl_SYS_SOCKET_H])
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    AC_LIBOBJ([accept])
+  fi
+  gl_SYS_SOCKET_MODULE_INDICATOR([accept])
+  gl_ARPA_INET_H
+  gl_ARPA_INET_H_REQUIRE_DEFAULTS
+  AC_PROG_MKDIR_P
+  AC_REQUIRE([gl_SYS_SOCKET_H])
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    AC_LIBOBJ([bind])
+  fi
+  gl_SYS_SOCKET_MODULE_INDICATOR([bind])
+  gt_LOCALE_FR
+  gt_LOCALE_FR_UTF8
+  gt_LOCALE_FR
+  gt_LOCALE_TR_UTF8
+  AC_REQUIRE([gl_SYS_SOCKET_H])
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    AC_LIBOBJ([connect])
+  fi
+  gl_SYS_SOCKET_MODULE_INDICATOR([connect])
+  gl_ENVIRON
+  gl_UNISTD_MODULE_INDICATOR([environ])
+  gl_FUNC_FDOPEN
+  if test $REPLACE_FDOPEN = 1; then
+    AC_LIBOBJ([fdopen])
+    gl_PREREQ_FDOPEN
+  fi
+  gl_STDIO_MODULE_INDICATOR([fdopen])
+  gl_FLOAT_H
+  if test $REPLACE_FLOAT_LDBL = 1; then
+    AC_LIBOBJ([float])
+  fi
+  if test $REPLACE_ITOLD = 1; then
+    AC_LIBOBJ([itold])
+  fi
+  gl_FUNC_FTRUNCATE
+  if test $HAVE_FTRUNCATE = 0 || test $REPLACE_FTRUNCATE = 1; then
+    AC_LIBOBJ([ftruncate])
+    gl_PREREQ_FTRUNCATE
+  fi
+  gl_UNISTD_MODULE_INDICATOR([ftruncate])
+  gl_FUNC_GETTIMEOFDAY
+  if test $HAVE_GETTIMEOFDAY = 0 || test $REPLACE_GETTIMEOFDAY = 1; then
+    AC_LIBOBJ([gettimeofday])
+    gl_PREREQ_GETTIMEOFDAY
+  fi
+  gl_SYS_TIME_MODULE_INDICATOR([gettimeofday])
+  gl_MUSL_LIBC
+  dnl Distinguish OpenBSD >= 6.2 from OpenBSD < 6.2.
+  AC_CHECK_FUNCS_ONCE([duplocale])
+  gl_FUNC_INET_PTON
+  if test $HAVE_INET_PTON = 0 || test $REPLACE_INET_PTON = 1; then
+    AC_LIBOBJ([inet_pton])
+    gl_PREREQ_INET_PTON
+  fi
+  gl_ARPA_INET_MODULE_INDICATOR([inet_pton])
+  AC_C_BIGENDIAN
+  gl_INTTOSTR
+  gl_FUNC_IOCTL
+  if test $HAVE_IOCTL = 0 || test $REPLACE_IOCTL = 1; then
+    AC_LIBOBJ([ioctl])
+  fi
+  gl_SYS_IOCTL_MODULE_INDICATOR([ioctl])
+  gt_LOCALE_FR
+  gt_LOCALE_FR_UTF8
+  gt_LOCALE_JA
+  gt_LOCALE_ZH_CN
+  gt_LOCALE_FR
+  gt_LOCALE_FR_UTF8
+  gt_LOCALE_JA
+  gt_LOCALE_ZH_CN
+  AC_REQUIRE([gl_SYS_SOCKET_H])
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    AC_LIBOBJ([listen])
+  fi
+  gl_SYS_SOCKET_MODULE_INDICATOR([listen])
+  AC_CHECK_FUNCS_ONCE([newlocale])
+  gl_LOCALENAME
+  gl_LOCALE_MODULE_INDICATOR([localename])
+  AC_CHECK_FUNCS_ONCE([newlocale])
+  gt_LOCALE_TR_UTF8
+  gt_LOCALE_FR_UTF8
+  gt_LOCALE_FR
+  gt_LOCALE_FR_UTF8
+  gt_LOCALE_JA
+  gt_LOCALE_ZH_CN
+  gt_LOCALE_FR_UTF8
+  gt_LOCALE_ZH_CN
+  dnl Check for prerequisites for memory fence checks.
+  gl_FUNC_MMAP_ANON
+  AC_CHECK_HEADERS_ONCE([sys/mman.h])
+  AC_CHECK_FUNCS_ONCE([mprotect])
+  gl_FUNC_MMAP_ANON
+  AC_CHECK_HEADERS_ONCE([sys/mman.h])
+  AC_CHECK_FUNCS_ONCE([mprotect])
+  gl_FUNC_MMAP_ANON
+  AC_CHECK_HEADERS_ONCE([sys/mman.h])
+  AC_CHECK_FUNCS_ONCE([mprotect])
+  gl_FUNC_NANOSLEEP
+  if test $HAVE_NANOSLEEP = 0 || test $REPLACE_NANOSLEEP = 1; then
+    AC_LIBOBJ([nanosleep])
+    gl_PREREQ_NANOSLEEP
+  fi
+  gl_TIME_MODULE_INDICATOR([nanosleep])
+  AC_CHECK_DECLS_ONCE([alarm])
+  gl_HEADER_NETINET_IN
+  AC_PROG_MKDIR_P
+  gt_LOCALE_FR
+  gt_LOCALE_FR_UTF8
+  gl_FUNC_PERROR
+  if test $REPLACE_PERROR = 1; then
+    AC_LIBOBJ([perror])
+  fi
+  gl_STRING_MODULE_INDICATOR([perror])
+  gl_PTHREAD_H
+  gl_PTHREAD_H_REQUIRE_DEFAULTS
+  gl_PTHREAD_THREAD
+  if test $HAVE_PTHREAD_CREATE = 0 || test $REPLACE_PTHREAD_CREATE = 1; then
+    AC_LIBOBJ([pthread-thread])
+  fi
+  gl_PTHREAD_MODULE_INDICATOR([pthread-thread])
+  gl_FUNC_PTHREAD_SIGMASK
+  if test $HAVE_PTHREAD_SIGMASK = 0 || test $REPLACE_PTHREAD_SIGMASK = 1; then
+    AC_LIBOBJ([pthread_sigmask])
+    gl_PREREQ_PTHREAD_SIGMASK
+  fi
+  gl_SIGNAL_MODULE_INDICATOR([pthread_sigmask])
+  gl_FUNC_PUTENV
+  if test $REPLACE_PUTENV = 1; then
+    AC_LIBOBJ([putenv])
+    gl_PREREQ_PUTENV
+  fi
+  gl_STDLIB_MODULE_INDICATOR([putenv])
+  dnl Check for prerequisites for memory fence checks.
+  dnl FIXME: zerosize-ptr.h requires these: make a module for it
+  gl_FUNC_MMAP_ANON
+  AC_CHECK_HEADERS_ONCE([sys/mman.h])
+  AC_CHECK_FUNCS_ONCE([mprotect])
+  dnl Check for prerequisites for memory fence checks.
+  gl_FUNC_MMAP_ANON
+  AC_CHECK_HEADERS_ONCE([sys/mman.h])
+  AC_CHECK_FUNCS_ONCE([mprotect])
+  gl_SCHED_H
+  gl_SCHED_H_REQUIRE_DEFAULTS
+  gl_FUNC_SELECT
+  if test $REPLACE_SELECT = 1; then
+    AC_LIBOBJ([select])
+  fi
+  gl_SYS_SELECT_MODULE_INDICATOR([select])
+  AC_CHECK_HEADERS_ONCE([sys/wait.h])
+  gl_FUNC_SETENV
+  if test $HAVE_SETENV = 0 || test $REPLACE_SETENV = 1; then
+    AC_LIBOBJ([setenv])
+  fi
+  gl_STDLIB_MODULE_INDICATOR([setenv])
+  gl_FUNC_SETLOCALE
+  if test $REPLACE_SETLOCALE = 1; then
+    AC_LIBOBJ([setlocale])
+    gl_PREREQ_SETLOCALE
+  fi
+  gl_LOCALE_MODULE_INDICATOR([setlocale])
+  gt_LOCALE_FR
+  gt_LOCALE_FR_UTF8
+  gt_LOCALE_JA
+  gt_LOCALE_ZH_CN
+  AC_REQUIRE([gl_SYS_SOCKET_H])
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    AC_LIBOBJ([setsockopt])
+  fi
+  gl_SYS_SOCKET_MODULE_INDICATOR([setsockopt])
+  gl_SIGACTION
+  if test $HAVE_SIGACTION = 0; then
+    AC_LIBOBJ([sigaction])
+    gl_PREREQ_SIGACTION
+  fi
+  gl_SIGNAL_MODULE_INDICATOR([sigaction])
+  gl_SIGNALBLOCKING
+  if test $HAVE_POSIX_SIGNALBLOCKING = 0; then
+    AC_LIBOBJ([sigprocmask])
+    gl_PREREQ_SIGPROCMASK
+  fi
+  gl_SIGNAL_MODULE_INDICATOR([sigprocmask])
+  AC_CHECK_FUNCS_ONCE([setrlimit])
+  gl_FUNC_MMAP_ANON
+  gl_SIZE_MAX
+  gl_FUNC_SLEEP
+  if test $HAVE_SLEEP = 0 || test $REPLACE_SLEEP = 1; then
+    AC_LIBOBJ([sleep])
+  fi
+  gl_UNISTD_MODULE_INDICATOR([sleep])
+  AC_CHECK_DECLS_ONCE([alarm])
+  gl_FUNC_SNPRINTF
+  gl_STDIO_MODULE_INDICATOR([snprintf])
+  gl_MODULE_INDICATOR([snprintf])
+  AC_REQUIRE([gl_SYS_SOCKET_H])
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    AC_LIBOBJ([socket])
+  fi
+  # When this module is used, sockets may actually occur as file descriptors,
+  # hence it is worth warning if the modules 'close' and 'ioctl' are not used.
+  m4_ifdef([gl_UNISTD_H_DEFAULTS], [gl_UNISTD_H_REQUIRE_DEFAULTS])
+  m4_ifdef([gl_SYS_IOCTL_H_DEFAULTS], [gl_SYS_IOCTL_H_REQUIRE_DEFAULTS])
+  AC_REQUIRE([gl_PREREQ_SYS_H_WINSOCK2])
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS=1
+    SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS=1
+  fi
+  gl_SYS_SOCKET_MODULE_INDICATOR([socket])
+  AC_REQUIRE([gl_SOCKETLIB])
+  AC_REQUIRE([gl_SOCKETS])
+  gl_TYPE_SOCKLEN_T
+  AC_REQUIRE([gt_TYPE_WCHAR_T])
+  AC_REQUIRE([gt_TYPE_WINT_T])
+  gl_FUNC_STRERROR_R
+  if test $HAVE_DECL_STRERROR_R = 0 || test $REPLACE_STRERROR_R = 1; then
+    AC_LIBOBJ([strerror_r])
+    gl_PREREQ_STRERROR_R
+  fi
+  gl_STRING_MODULE_INDICATOR([strerror_r])
+  dnl For the modules argp, error.
+  gl_MODULE_INDICATOR([strerror_r-posix])
+  dnl Check for prerequisites for memory fence checks.
+  gl_FUNC_MMAP_ANON
+  AC_CHECK_HEADERS_ONCE([sys/mman.h])
+  AC_CHECK_FUNCS_ONCE([mprotect])
+  AC_CHECK_DECLS_ONCE([alarm])
+  gl_FUNC_MMAP_ANON
+  AC_CHECK_HEADERS_ONCE([sys/mman.h])
+  AC_CHECK_FUNCS_ONCE([mprotect])
+  gl_FUNC_SYMLINK
+  if test $HAVE_SYMLINK = 0 || test $REPLACE_SYMLINK = 1; then
+    AC_LIBOBJ([symlink])
+  fi
+  gl_UNISTD_MODULE_INDICATOR([symlink])
+  gl_SYS_IOCTL_H
+  gl_SYS_IOCTL_H_REQUIRE_DEFAULTS
+  AC_PROG_MKDIR_P
+  gl_SYS_SELECT_H
+  gl_SYS_SELECT_H_REQUIRE_DEFAULTS
+  AC_PROG_MKDIR_P
+  gl_SYS_SOCKET_H
+  gl_SYS_SOCKET_H_REQUIRE_DEFAULTS
+  AC_PROG_MKDIR_P
+  AC_CHECK_FUNCS_ONCE([shutdown])
+  gl_SYS_TIME_H
+  gl_SYS_TIME_H_REQUIRE_DEFAULTS
+  AC_PROG_MKDIR_P
+  gl_SYS_UIO_H
+  gl_SYS_UIO_H_REQUIRE_DEFAULTS
+  AC_PROG_MKDIR_P
+  gl_THREAD
+  AC_CHECK_HEADERS([sys/single_threaded.h])
+  gl_FUNC_UNSETENV
+  if test $HAVE_UNSETENV = 0 || test $REPLACE_UNSETENV = 1; then
+    AC_LIBOBJ([unsetenv])
+    gl_PREREQ_UNSETENV
+  fi
+  gl_STDLIB_MODULE_INDICATOR([unsetenv])
+  AC_REQUIRE([AC_C_RESTRICT])
+  gl_FUNC_VASNPRINTF
+  abs_aux_dir=`cd "$ac_aux_dir"; pwd`
+  AC_SUBST([abs_aux_dir])
+  gt_LOCALE_FR
+  gt_LOCALE_FR_UTF8
+  gt_LOCALE_JA
+  gt_LOCALE_ZH_CN
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  case "$host_os" in
+    mingw*)
+      AC_LIBOBJ([windows-thread])
+      ;;
+  esac
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  case "$host_os" in
+    mingw*)
+      AC_LIBOBJ([windows-tls])
+      ;;
+  esac
+  gl_XSIZE
+  m4_popdef([gl_MODULE_INDICATOR_CONDITION])
+  m4_ifval(gltests_LIBSOURCES_LIST, [
+    m4_syscmd([test ! -d ]m4_defn([gltests_LIBSOURCES_DIR])[ ||
+      for gl_file in ]gltests_LIBSOURCES_LIST[ ; do
+        if test ! -r ]m4_defn([gltests_LIBSOURCES_DIR])[/$gl_file ; then
+          echo "missing file ]m4_defn([gltests_LIBSOURCES_DIR])[/$gl_file" >&2
+          exit 1
+        fi
+      done])dnl
+      m4_if(m4_sysval, [0], [],
+        [AC_FATAL([expected source file, required through AC_LIBSOURCES, not found])])
+  ])
+  m4_popdef([GL_MODULE_INDICATOR_PREFIX])
+  m4_popdef([GL_MACRO_PREFIX])
+  m4_popdef([gltests_LIBSOURCES_DIR])
+  m4_popdef([gltests_LIBSOURCES_LIST])
+  m4_popdef([AC_LIBSOURCES])
+  m4_popdef([AC_REPLACE_FUNCS])
+  m4_popdef([AC_LIBOBJ])
+  AC_CONFIG_COMMANDS_PRE([
+    gltests_libobjs=
+    gltests_ltlibobjs=
+    if test -n "$gltests_LIBOBJS"; then
+      # Remove the extension.
+      sed_drop_objext='s/\.o$//;s/\.obj$//'
+      for i in `for i in $gltests_LIBOBJS; do echo "$i"; done | sed -e "$sed_drop_objext" | sort | uniq`; do
+        gltests_libobjs="$gltests_libobjs $i.$ac_objext"
+        gltests_ltlibobjs="$gltests_ltlibobjs $i.lo"
+      done
+    fi
+    AC_SUBST([gltests_LIBOBJS], [$gltests_libobjs])
+    AC_SUBST([gltests_LTLIBOBJS], [$gltests_ltlibobjs])
+  ])
+  LIBGREPUTILS_LIBDEPS="$gl_libdeps"
+  AC_SUBST([LIBGREPUTILS_LIBDEPS])
+  LIBGREPUTILS_LTLIBDEPS="$gl_ltlibdeps"
+  AC_SUBST([LIBGREPUTILS_LTLIBDEPS])
+  LIBTESTS_LIBDEPS="$gltests_libdeps"
+  AC_SUBST([LIBTESTS_LIBDEPS])
+])
+
+# Like AC_LIBOBJ, except that the module name goes
+# into gl_LIBOBJS instead of into LIBOBJS.
+AC_DEFUN([gl_LIBOBJ], [
+  AS_LITERAL_IF([$1], [gl_LIBSOURCES([$1.c])])dnl
+  gl_LIBOBJS="$gl_LIBOBJS $1.$ac_objext"
+])
+
+# Like AC_REPLACE_FUNCS, except that the module name goes
+# into gl_LIBOBJS instead of into LIBOBJS.
+AC_DEFUN([gl_REPLACE_FUNCS], [
+  m4_foreach_w([gl_NAME], [$1], [AC_LIBSOURCES(gl_NAME[.c])])dnl
+  AC_CHECK_FUNCS([$1], , [gl_LIBOBJ($ac_func)])
+])
+
+# Like AC_LIBSOURCES, except the directory where the source file is
+# expected is derived from the gnulib-tool parameterization,
+# and alloca is special cased (for the alloca-opt module).
+# We could also entirely rely on EXTRA_lib..._SOURCES.
+AC_DEFUN([gl_LIBSOURCES], [
+  m4_foreach([_gl_NAME], [$1], [
+    m4_if(_gl_NAME, [alloca.c], [], [
+      m4_define([gl_LIBSOURCES_DIR], [lib])
+      m4_append([gl_LIBSOURCES_LIST], _gl_NAME, [ ])
+    ])
+  ])
+])
+
+# Like AC_LIBOBJ, except that the module name goes
+# into gltests_LIBOBJS instead of into LIBOBJS.
+AC_DEFUN([gltests_LIBOBJ], [
+  AS_LITERAL_IF([$1], [gltests_LIBSOURCES([$1.c])])dnl
+  gltests_LIBOBJS="$gltests_LIBOBJS $1.$ac_objext"
+])
+
+# Like AC_REPLACE_FUNCS, except that the module name goes
+# into gltests_LIBOBJS instead of into LIBOBJS.
+AC_DEFUN([gltests_REPLACE_FUNCS], [
+  m4_foreach_w([gl_NAME], [$1], [AC_LIBSOURCES(gl_NAME[.c])])dnl
+  AC_CHECK_FUNCS([$1], , [gltests_LIBOBJ($ac_func)])
+])
+
+# Like AC_LIBSOURCES, except the directory where the source file is
+# expected is derived from the gnulib-tool parameterization,
+# and alloca is special cased (for the alloca-opt module).
+# We could also entirely rely on EXTRA_lib..._SOURCES.
+AC_DEFUN([gltests_LIBSOURCES], [
+  m4_foreach([_gl_NAME], [$1], [
+    m4_if(_gl_NAME, [alloca.c], [], [
+      m4_define([gltests_LIBSOURCES_DIR], [gnulib-tests])
+      m4_append([gltests_LIBSOURCES_LIST], _gl_NAME, [ ])
+    ])
+  ])
+])
+
+# This macro records the list of files which have been installed by
+# gnulib-tool and may be removed by future gnulib-tool invocations.
+AC_DEFUN([gl_FILE_LIST], [
+  build-aux/announce-gen
+  build-aux/config.rpath
+  build-aux/do-release-commit-and-tag
+  build-aux/gendocs.sh
+  build-aux/git-version-gen
+  build-aux/gitlog-to-changelog
+  build-aux/gnu-web-doc-update
+  build-aux/gnupload
+  build-aux/update-copyright
+  build-aux/useless-if-before-free
+  build-aux/vc-list-files
+  doc/fdl.texi
+  doc/gendocs_template
+  doc/gendocs_template_min
+  lib/_Noreturn.h
+  lib/alignof.h
+  lib/alloca.c
+  lib/alloca.in.h
+  lib/arg-nonnull.h
+  lib/argmatch.c
+  lib/argmatch.h
+  lib/assure.h
+  lib/at-func.c
+  lib/attribute.h
+  lib/basename-lgpl.c
+  lib/basename-lgpl.h
+  lib/binary-io.c
+  lib/binary-io.h
+  lib/bitrotate.c
+  lib/bitrotate.h
+  lib/btowc.c
+  lib/c++defs.h
+  lib/c-ctype.c
+  lib/c-ctype.h
+  lib/c-stack.c
+  lib/c-stack.h
+  lib/c-strcase.h
+  lib/c-strcasecmp.c
+  lib/c-strcaseeq.h
+  lib/c-strncasecmp.c
+  lib/calloc.c
+  lib/cdefs.h
+  lib/chdir-long.c
+  lib/chdir-long.h
+  lib/cloexec.c
+  lib/cloexec.h
+  lib/close-stream.c
+  lib/close-stream.h
+  lib/close.c
+  lib/closedir.c
+  lib/closeout.c
+  lib/closeout.h
+  lib/creat-safer.c
+  lib/ctype.in.h
+  lib/cycle-check.c
+  lib/cycle-check.h
+  lib/dev-ino.h
+  lib/dfa.c
+  lib/dfa.h
+  lib/dirent-private.h
+  lib/dirent.in.h
+  lib/dirfd.c
+  lib/dirname-lgpl.c
+  lib/dirname.h
+  lib/dup-safer-flag.c
+  lib/dup-safer.c
+  lib/dup.c
+  lib/dup2.c
+  lib/dynarray.h
+  lib/errno.in.h
+  lib/error.c
+  lib/error.h
+  lib/exclude.c
+  lib/exclude.h
+  lib/exitfail.c
+  lib/exitfail.h
+  lib/fchdir.c
+  lib/fcntl--.h
+  lib/fcntl-safer.h
+  lib/fcntl.c
+  lib/fcntl.in.h
+  lib/fd-hook.c
+  lib/fd-hook.h
+  lib/fd-safer-flag.c
+  lib/fd-safer.c
+  lib/fdopendir.c
+  lib/filename.h
+  lib/filenamecat-lgpl.c
+  lib/filenamecat.h
+  lib/flexmember.h
+  lib/fnmatch.c
+  lib/fnmatch.in.h
+  lib/fnmatch_loop.c
+  lib/fopen.c
+  lib/fpending.c
+  lib/fpending.h
+  lib/free.c
+  lib/fstat.c
+  lib/fstatat.c
+  lib/fts-cycle.c
+  lib/fts.c
+  lib/fts_.h
+  lib/getcwd-lgpl.c
+  lib/getdtablesize.c
+  lib/getopt-cdefs.in.h
+  lib/getopt-core.h
+  lib/getopt-ext.h
+  lib/getopt-pfx-core.h
+  lib/getopt-pfx-ext.h
+  lib/getopt.c
+  lib/getopt.in.h
+  lib/getopt1.c
+  lib/getopt_int.h
+  lib/getpagesize.c
+  lib/getprogname.c
+  lib/getprogname.h
+  lib/gettext.h
+  lib/glthread/lock.c
+  lib/glthread/lock.h
+  lib/glthread/threadlib.c
+  lib/hard-locale.c
+  lib/hard-locale.h
+  lib/hash.c
+  lib/hash.h
+  lib/i-ring.c
+  lib/i-ring.h
+  lib/ialloc.c
+  lib/ialloc.h
+  lib/iconv.c
+  lib/iconv.in.h
+  lib/iconv_close.c
+  lib/iconv_open-aix.gperf
+  lib/iconv_open-hpux.gperf
+  lib/iconv_open-irix.gperf
+  lib/iconv_open-osf.gperf
+  lib/iconv_open-solaris.gperf
+  lib/iconv_open-zos.gperf
+  lib/iconv_open.c
+  lib/idx.h
+  lib/ignore-value.h
+  lib/intprops.h
+  lib/inttypes.in.h
+  lib/isatty.c
+  lib/isblank.c
+  lib/iswblank.c
+  lib/iswctype-impl.h
+  lib/iswctype.c
+  lib/iswdigit.c
+  lib/iswxdigit.c
+  lib/langinfo.in.h
+  lib/lc-charset-dispatch.c
+  lib/lc-charset-dispatch.h
+  lib/libc-config.h
+  lib/limits.in.h
+  lib/localcharset.c
+  lib/localcharset.h
+  lib/locale.in.h
+  lib/localeconv.c
+  lib/localeinfo.c
+  lib/localeinfo.h
+  lib/lseek.c
+  lib/lstat.c
+  lib/malloc.c
+  lib/malloc/dynarray-skeleton.c
+  lib/malloc/dynarray.h
+  lib/malloc/dynarray_at_failure.c
+  lib/malloc/dynarray_emplace_enlarge.c
+  lib/malloc/dynarray_finalize.c
+  lib/malloc/dynarray_resize.c
+  lib/malloc/dynarray_resize_clear.c
+  lib/malloca.c
+  lib/malloca.h
+  lib/mbchar.c
+  lib/mbchar.h
+  lib/mbiter.c
+  lib/mbiter.h
+  lib/mbrlen.c
+  lib/mbrtowc-impl-utf8.h
+  lib/mbrtowc-impl.h
+  lib/mbrtowc.c
+  lib/mbscasecmp.c
+  lib/mbsinit.c
+  lib/mbslen.c
+  lib/mbsrtowcs-impl.h
+  lib/mbsrtowcs-state.c
+  lib/mbsrtowcs.c
+  lib/mbsstr.c
+  lib/mbtowc-impl.h
+  lib/mbtowc-lock.c
+  lib/mbtowc-lock.h
+  lib/mbtowc.c
+  lib/mbuiter.c
+  lib/mbuiter.h
+  lib/memchr.c
+  lib/memchr.valgrind
+  lib/memchr2.c
+  lib/memchr2.h
+  lib/memchr2.valgrind
+  lib/mempcpy.c
+  lib/memrchr.c
+  lib/minmax.h
+  lib/msvc-inval.c
+  lib/msvc-inval.h
+  lib/msvc-nothrow.c
+  lib/msvc-nothrow.h
+  lib/nl_langinfo-lock.c
+  lib/nl_langinfo.c
+  lib/obstack.c
+  lib/obstack.h
+  lib/open-safer.c
+  lib/open.c
+  lib/openat-die.c
+  lib/openat-priv.h
+  lib/openat-proc.c
+  lib/openat-safer.c
+  lib/openat.c
+  lib/openat.h
+  lib/opendir.c
+  lib/opendirat.c
+  lib/opendirat.h
+  lib/pathmax.h
+  lib/pipe-safer.c
+  lib/pipe.c
+  lib/propername.c
+  lib/propername.h
+  lib/quote.h
+  lib/quotearg.c
+  lib/quotearg.h
+  lib/raise.c
+  lib/rawmemchr.c
+  lib/rawmemchr.valgrind
+  lib/read.c
+  lib/readdir.c
+  lib/realloc.c
+  lib/reallocarray.c
+  lib/regcomp.c
+  lib/regex.c
+  lib/regex.h
+  lib/regex_internal.c
+  lib/regex_internal.h
+  lib/regexec.c
+  lib/safe-read.c
+  lib/safe-read.h
+  lib/same-inode.h
+  lib/save-cwd.c
+  lib/save-cwd.h
+  lib/setlocale-lock.c
+  lib/setlocale_null.c
+  lib/setlocale_null.h
+  lib/signal.in.h
+  lib/sigsegv.c
+  lib/sigsegv.in.h
+  lib/stackvma.c
+  lib/stackvma.h
+  lib/stat-time.c
+  lib/stat-time.h
+  lib/stat-w32.c
+  lib/stat-w32.h
+  lib/stat.c
+  lib/stdalign.in.h
+  lib/stdarg.in.h
+  lib/stdbool.in.h
+  lib/stddef.in.h
+  lib/stdint.in.h
+  lib/stdio-impl.h
+  lib/stdio.in.h
+  lib/stdlib.in.h
+  lib/stpcpy.c
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+  tests=lib/sys_time.in.h
+  tests=lib/sys_uio.in.h
+  tests=lib/thread-optim.h
+  tests=lib/uinttostr.c
+  tests=lib/umaxtostr.c
+  tests=lib/unsetenv.c
+  tests=lib/vasnprintf.c
+  tests=lib/vasnprintf.h
+  tests=lib/w32sock.h
+  tests=lib/warn-on-use.h
+  tests=lib/windows-thread.c
+  tests=lib/windows-thread.h
+  tests=lib/windows-tls.c
+  tests=lib/windows-tls.h
+  tests=lib/xsize.c
+  tests=lib/xsize.h
+  tests=lib/xstrtol-error.c
+  tests=lib/xstrtol-error.h
+  top/GNUmakefile
+  top/README-release
+  top/maint.mk
+])
diff --git a/src/grep/m4/host-cpu-c-abi.m4 b/src/grep/m4/host-cpu-c-abi.m4
new file mode 100644
index 0000000..64e28b1
--- /dev/null
+++ b/src/grep/m4/host-cpu-c-abi.m4
@@ -0,0 +1,675 @@
+# host-cpu-c-abi.m4 serial 14
+dnl Copyright (C) 2002-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible and Sam Steingold.
+
+dnl Sets the HOST_CPU variable to the canonical name of the CPU.
+dnl Sets the HOST_CPU_C_ABI variable to the canonical name of the CPU with its
+dnl C language ABI (application binary interface).
+dnl Also defines __${HOST_CPU}__ and __${HOST_CPU_C_ABI}__ as C macros in
+dnl config.h.
+dnl
+dnl This canonical name can be used to select a particular assembly language
+dnl source file that will interoperate with C code on the given host.
+dnl
+dnl For example:
+dnl * 'i386' and 'sparc' are different canonical names, because code for i386
+dnl   will not run on SPARC CPUs and vice versa. They have different
+dnl   instruction sets.
+dnl * 'sparc' and 'sparc64' are different canonical names, because code for
+dnl   'sparc' and code for 'sparc64' cannot be linked together: 'sparc' code
+dnl   contains 32-bit instructions, whereas 'sparc64' code contains 64-bit
+dnl   instructions. A process on a SPARC CPU can be in 32-bit mode or in 64-bit
+dnl   mode, but not both.
+dnl * 'mips' and 'mipsn32' are different canonical names, because they use
+dnl   different argument passing and return conventions for C functions, and
+dnl   although the instruction set of 'mips' is a large subset of the
+dnl   instruction set of 'mipsn32'.
+dnl * 'mipsn32' and 'mips64' are different canonical names, because they use
+dnl   different sizes for the C types like 'int' and 'void *', and although
+dnl   the instruction sets of 'mipsn32' and 'mips64' are the same.
+dnl * The same canonical name is used for different endiannesses. You can
+dnl   determine the endianness through preprocessor symbols:
+dnl   - 'arm': test __ARMEL__.
+dnl   - 'mips', 'mipsn32', 'mips64': test _MIPSEB vs. _MIPSEL.
+dnl   - 'powerpc64': test _BIG_ENDIAN vs. _LITTLE_ENDIAN.
+dnl * The same name 'i386' is used for CPUs of type i386, i486, i586
+dnl   (Pentium), AMD K7, Pentium II, Pentium IV, etc., because
+dnl   - Instructions that do not exist on all of these CPUs (cmpxchg,
+dnl     MMX, SSE, SSE2, 3DNow! etc.) are not frequently used. If your
+dnl     assembly language source files use such instructions, you will
+dnl     need to make the distinction.
+dnl   - Speed of execution of the common instruction set is reasonable across
+dnl     the entire family of CPUs. If you have assembly language source files
+dnl     that are optimized for particular CPU types (like GNU gmp has), you
+dnl     will need to make the distinction.
+dnl   See <https://en.wikipedia.org/wiki/X86_instruction_listings>.
+AC_DEFUN([gl_HOST_CPU_C_ABI],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([gl_C_ASM])
+  AC_CACHE_CHECK([host CPU and C ABI], [gl_cv_host_cpu_c_abi],
+    [case "$host_cpu" in
+
+changequote(,)dnl
+       i[34567]86 )
+changequote([,])dnl
+         gl_cv_host_cpu_c_abi=i386
+         ;;
+
+       x86_64 )
+         # On x86_64 systems, the C compiler may be generating code in one of
+         # these ABIs:
+         # - 64-bit instruction set, 64-bit pointers, 64-bit 'long': x86_64.
+         # - 64-bit instruction set, 64-bit pointers, 32-bit 'long': x86_64
+         #   with native Windows (mingw, MSVC).
+         # - 64-bit instruction set, 32-bit pointers, 32-bit 'long': x86_64-x32.
+         # - 32-bit instruction set, 32-bit pointers, 32-bit 'long': i386.
+         AC_COMPILE_IFELSE(
+           [AC_LANG_SOURCE(
+              [[#if (defined __x86_64__ || defined __amd64__ \
+                     || defined _M_X64 || defined _M_AMD64)
+                 int ok;
+                #else
+                 error fail
+                #endif
+              ]])],
+           [AC_COMPILE_IFELSE(
+              [AC_LANG_SOURCE(
+                 [[#if defined __ILP32__ || defined _ILP32
+                    int ok;
+                   #else
+                    error fail
+                   #endif
+                 ]])],
+              [gl_cv_host_cpu_c_abi=x86_64-x32],
+              [gl_cv_host_cpu_c_abi=x86_64])],
+           [gl_cv_host_cpu_c_abi=i386])
+         ;;
+
+changequote(,)dnl
+       alphaev[4-8] | alphaev56 | alphapca5[67] | alphaev6[78] )
+changequote([,])dnl
+         gl_cv_host_cpu_c_abi=alpha
+         ;;
+
+       arm* | aarch64 )
+         # Assume arm with EABI.
+         # On arm64 systems, the C compiler may be generating code in one of
+         # these ABIs:
+         # - aarch64 instruction set, 64-bit pointers, 64-bit 'long': arm64.
+         # - aarch64 instruction set, 32-bit pointers, 32-bit 'long': arm64-ilp32.
+         # - 32-bit instruction set, 32-bit pointers, 32-bit 'long': arm or armhf.
+         AC_COMPILE_IFELSE(
+           [AC_LANG_SOURCE(
+              [[#ifdef __aarch64__
+                 int ok;
+                #else
+                 error fail
+                #endif
+              ]])],
+           [AC_COMPILE_IFELSE(
+              [AC_LANG_SOURCE(
+                [[#if defined __ILP32__ || defined _ILP32
+                   int ok;
+                  #else
+                   error fail
+                  #endif
+                ]])],
+              [gl_cv_host_cpu_c_abi=arm64-ilp32],
+              [gl_cv_host_cpu_c_abi=arm64])],
+           [# Don't distinguish little-endian and big-endian arm, since they
+            # don't require different machine code for simple operations and
+            # since the user can distinguish them through the preprocessor
+            # defines __ARMEL__ vs. __ARMEB__.
+            # But distinguish arm which passes floating-point arguments and
+            # return values in integer registers (r0, r1, ...) - this is
+            # gcc -mfloat-abi=soft or gcc -mfloat-abi=softfp - from arm which
+            # passes them in float registers (s0, s1, ...) and double registers
+            # (d0, d1, ...) - this is gcc -mfloat-abi=hard. GCC 4.6 or newer
+            # sets the preprocessor defines __ARM_PCS (for the first case) and
+            # __ARM_PCS_VFP (for the second case), but older GCC does not.
+            echo 'double ddd; void func (double dd) { ddd = dd; }' > conftest.c
+            # Look for a reference to the register d0 in the .s file.
+            AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS $gl_c_asm_opt conftest.c) >/dev/null 2>&1
+            if LC_ALL=C grep 'd0,' conftest.$gl_asmext >/dev/null; then
+              gl_cv_host_cpu_c_abi=armhf
+            else
+              gl_cv_host_cpu_c_abi=arm
+            fi
+            rm -f conftest*
+           ])
+         ;;
+
+       hppa1.0 | hppa1.1 | hppa2.0* | hppa64 )
+         # On hppa, the C compiler may be generating 32-bit code or 64-bit
+         # code. In the latter case, it defines _LP64 and __LP64__.
+         AC_COMPILE_IFELSE(
+           [AC_LANG_SOURCE(
+              [[#ifdef __LP64__
+                 int ok;
+                #else
+                 error fail
+                #endif
+              ]])],
+           [gl_cv_host_cpu_c_abi=hppa64],
+           [gl_cv_host_cpu_c_abi=hppa])
+         ;;
+
+       ia64* )
+         # On ia64 on HP-UX, the C compiler may be generating 64-bit code or
+         # 32-bit code. In the latter case, it defines _ILP32.
+         AC_COMPILE_IFELSE(
+           [AC_LANG_SOURCE(
+              [[#ifdef _ILP32
+                 int ok;
+                #else
+                 error fail
+                #endif
+              ]])],
+           [gl_cv_host_cpu_c_abi=ia64-ilp32],
+           [gl_cv_host_cpu_c_abi=ia64])
+         ;;
+
+       mips* )
+         # We should also check for (_MIPS_SZPTR == 64), but gcc keeps this
+         # at 32.
+         AC_COMPILE_IFELSE(
+           [AC_LANG_SOURCE(
+              [[#if defined _MIPS_SZLONG && (_MIPS_SZLONG == 64)
+                 int ok;
+                #else
+                 error fail
+                #endif
+              ]])],
+           [gl_cv_host_cpu_c_abi=mips64],
+           [# In the n32 ABI, _ABIN32 is defined, _ABIO32 is not defined (but
+            # may later get defined by <sgidefs.h>), and _MIPS_SIM == _ABIN32.
+            # In the 32 ABI, _ABIO32 is defined, _ABIN32 is not defined (but
+            # may later get defined by <sgidefs.h>), and _MIPS_SIM == _ABIO32.
+            AC_COMPILE_IFELSE(
+              [AC_LANG_SOURCE(
+                 [[#if (_MIPS_SIM == _ABIN32)
+                    int ok;
+                   #else
+                    error fail
+                   #endif
+                 ]])],
+              [gl_cv_host_cpu_c_abi=mipsn32],
+              [gl_cv_host_cpu_c_abi=mips])])
+         ;;
+
+       powerpc* )
+         # Different ABIs are in use on AIX vs. Mac OS X vs. Linux,*BSD.
+         # No need to distinguish them here; the caller may distinguish
+         # them based on the OS.
+         # On powerpc64 systems, the C compiler may still be generating
+         # 32-bit code. And on powerpc-ibm-aix systems, the C compiler may
+         # be generating 64-bit code.
+         AC_COMPILE_IFELSE(
+           [AC_LANG_SOURCE(
+              [[#if defined __powerpc64__ || defined __LP64__
+                 int ok;
+                #else
+                 error fail
+                #endif
+              ]])],
+           [# On powerpc64, there are two ABIs on Linux: The AIX compatible
+            # one and the ELFv2 one. The latter defines _CALL_ELF=2.
+            AC_COMPILE_IFELSE(
+              [AC_LANG_SOURCE(
+                 [[#if defined _CALL_ELF && _CALL_ELF == 2
+                    int ok;
+                   #else
+                    error fail
+                   #endif
+                 ]])],
+              [gl_cv_host_cpu_c_abi=powerpc64-elfv2],
+              [gl_cv_host_cpu_c_abi=powerpc64])
+           ],
+           [gl_cv_host_cpu_c_abi=powerpc])
+         ;;
+
+       rs6000 )
+         gl_cv_host_cpu_c_abi=powerpc
+         ;;
+
+       riscv32 | riscv64 )
+         # There are 2 architectures (with variants): rv32* and rv64*.
+         AC_COMPILE_IFELSE(
+           [AC_LANG_SOURCE(
+              [[#if __riscv_xlen == 64
+                  int ok;
+                #else
+                  error fail
+                #endif
+              ]])],
+           [cpu=riscv64],
+           [cpu=riscv32])
+         # There are 6 ABIs: ilp32, ilp32f, ilp32d, lp64, lp64f, lp64d.
+         # Size of 'long' and 'void *':
+         AC_COMPILE_IFELSE(
+           [AC_LANG_SOURCE(
+              [[#if defined __LP64__
+                  int ok;
+                #else
+                  error fail
+                #endif
+              ]])],
+           [main_abi=lp64],
+           [main_abi=ilp32])
+         # Float ABIs:
+         # __riscv_float_abi_double:
+         #   'float' and 'double' are passed in floating-point registers.
+         # __riscv_float_abi_single:
+         #   'float' are passed in floating-point registers.
+         # __riscv_float_abi_soft:
+         #   No values are passed in floating-point registers.
+         AC_COMPILE_IFELSE(
+           [AC_LANG_SOURCE(
+              [[#if defined __riscv_float_abi_double
+                  int ok;
+                #else
+                  error fail
+                #endif
+              ]])],
+           [float_abi=d],
+           [AC_COMPILE_IFELSE(
+              [AC_LANG_SOURCE(
+                 [[#if defined __riscv_float_abi_single
+                     int ok;
+                   #else
+                     error fail
+                   #endif
+                 ]])],
+              [float_abi=f],
+              [float_abi=''])
+           ])
+         gl_cv_host_cpu_c_abi="${cpu}-${main_abi}${float_abi}"
+         ;;
+
+       s390* )
+         # On s390x, the C compiler may be generating 64-bit (= s390x) code
+         # or 31-bit (= s390) code.
+         AC_COMPILE_IFELSE(
+           [AC_LANG_SOURCE(
+              [[#if defined __LP64__ || defined __s390x__
+                  int ok;
+                #else
+                  error fail
+                #endif
+              ]])],
+           [gl_cv_host_cpu_c_abi=s390x],
+           [gl_cv_host_cpu_c_abi=s390])
+         ;;
+
+       sparc | sparc64 )
+         # UltraSPARCs running Linux have `uname -m` = "sparc64", but the
+         # C compiler still generates 32-bit code.
+         AC_COMPILE_IFELSE(
+           [AC_LANG_SOURCE(
+              [[#if defined __sparcv9 || defined __arch64__
+                 int ok;
+                #else
+                 error fail
+                #endif
+              ]])],
+           [gl_cv_host_cpu_c_abi=sparc64],
+           [gl_cv_host_cpu_c_abi=sparc])
+         ;;
+
+       *)
+         gl_cv_host_cpu_c_abi="$host_cpu"
+         ;;
+     esac
+    ])
+
+  dnl In most cases, $HOST_CPU and $HOST_CPU_C_ABI are the same.
+  HOST_CPU=`echo "$gl_cv_host_cpu_c_abi" | sed -e 's/-.*//'`
+  HOST_CPU_C_ABI="$gl_cv_host_cpu_c_abi"
+  AC_SUBST([HOST_CPU])
+  AC_SUBST([HOST_CPU_C_ABI])
+
+  # This was
+  #   AC_DEFINE_UNQUOTED([__${HOST_CPU}__])
+  #   AC_DEFINE_UNQUOTED([__${HOST_CPU_C_ABI}__])
+  # earlier, but KAI C++ 3.2d doesn't like this.
+  sed -e 's/-/_/g' >> confdefs.h <<EOF
+#ifndef __${HOST_CPU}__
+#define __${HOST_CPU}__ 1
+#endif
+#ifndef __${HOST_CPU_C_ABI}__
+#define __${HOST_CPU_C_ABI}__ 1
+#endif
+EOF
+  AH_TOP([/* CPU and C ABI indicator */
+#ifndef __i386__
+#undef __i386__
+#endif
+#ifndef __x86_64_x32__
+#undef __x86_64_x32__
+#endif
+#ifndef __x86_64__
+#undef __x86_64__
+#endif
+#ifndef __alpha__
+#undef __alpha__
+#endif
+#ifndef __arm__
+#undef __arm__
+#endif
+#ifndef __armhf__
+#undef __armhf__
+#endif
+#ifndef __arm64_ilp32__
+#undef __arm64_ilp32__
+#endif
+#ifndef __arm64__
+#undef __arm64__
+#endif
+#ifndef __hppa__
+#undef __hppa__
+#endif
+#ifndef __hppa64__
+#undef __hppa64__
+#endif
+#ifndef __ia64_ilp32__
+#undef __ia64_ilp32__
+#endif
+#ifndef __ia64__
+#undef __ia64__
+#endif
+#ifndef __m68k__
+#undef __m68k__
+#endif
+#ifndef __mips__
+#undef __mips__
+#endif
+#ifndef __mipsn32__
+#undef __mipsn32__
+#endif
+#ifndef __mips64__
+#undef __mips64__
+#endif
+#ifndef __powerpc__
+#undef __powerpc__
+#endif
+#ifndef __powerpc64__
+#undef __powerpc64__
+#endif
+#ifndef __powerpc64_elfv2__
+#undef __powerpc64_elfv2__
+#endif
+#ifndef __riscv32__
+#undef __riscv32__
+#endif
+#ifndef __riscv64__
+#undef __riscv64__
+#endif
+#ifndef __riscv32_ilp32__
+#undef __riscv32_ilp32__
+#endif
+#ifndef __riscv32_ilp32f__
+#undef __riscv32_ilp32f__
+#endif
+#ifndef __riscv32_ilp32d__
+#undef __riscv32_ilp32d__
+#endif
+#ifndef __riscv64_ilp32__
+#undef __riscv64_ilp32__
+#endif
+#ifndef __riscv64_ilp32f__
+#undef __riscv64_ilp32f__
+#endif
+#ifndef __riscv64_ilp32d__
+#undef __riscv64_ilp32d__
+#endif
+#ifndef __riscv64_lp64__
+#undef __riscv64_lp64__
+#endif
+#ifndef __riscv64_lp64f__
+#undef __riscv64_lp64f__
+#endif
+#ifndef __riscv64_lp64d__
+#undef __riscv64_lp64d__
+#endif
+#ifndef __s390__
+#undef __s390__
+#endif
+#ifndef __s390x__
+#undef __s390x__
+#endif
+#ifndef __sh__
+#undef __sh__
+#endif
+#ifndef __sparc__
+#undef __sparc__
+#endif
+#ifndef __sparc64__
+#undef __sparc64__
+#endif
+])
+
+])
+
+
+dnl Sets the HOST_CPU_C_ABI_32BIT variable to 'yes' if the C language ABI
+dnl (application binary interface) is a 32-bit one, to 'no' if it is a 64-bit
+dnl one, or to 'unknown' if unknown.
+dnl This is a simplified variant of gl_HOST_CPU_C_ABI.
+AC_DEFUN([gl_HOST_CPU_C_ABI_32BIT],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CACHE_CHECK([32-bit host C ABI], [gl_cv_host_cpu_c_abi_32bit],
+    [if test -n "$gl_cv_host_cpu_c_abi"; then
+       case "$gl_cv_host_cpu_c_abi" in
+         i386 | x86_64-x32 | arm | armhf | arm64-ilp32 | hppa | ia64-ilp32 | mips | mipsn32 | powerpc | riscv*-ilp32* | s390 | sparc)
+           gl_cv_host_cpu_c_abi_32bit=yes ;;
+         x86_64 | alpha | arm64 | hppa64 | ia64 | mips64 | powerpc64 | powerpc64-elfv2 | riscv*-lp64* | s390x | sparc64 )
+           gl_cv_host_cpu_c_abi_32bit=no ;;
+         *)
+           gl_cv_host_cpu_c_abi_32bit=unknown ;;
+       esac
+     else
+       case "$host_cpu" in
+
+         # CPUs that only support a 32-bit ABI.
+         arc \
+         | bfin \
+         | cris* \
+         | csky \
+         | epiphany \
+         | ft32 \
+         | h8300 \
+         | m68k \
+         | microblaze | microblazeel \
+         | nds32 | nds32le | nds32be \
+         | nios2 | nios2eb | nios2el \
+         | or1k* \
+         | or32 \
+         | sh | sh[1234] | sh[1234]e[lb] \
+         | tic6x \
+         | xtensa* )
+           gl_cv_host_cpu_c_abi_32bit=yes
+           ;;
+
+         # CPUs that only support a 64-bit ABI.
+changequote(,)dnl
+         alpha | alphaev[4-8] | alphaev56 | alphapca5[67] | alphaev6[78] \
+         | mmix )
+changequote([,])dnl
+           gl_cv_host_cpu_c_abi_32bit=no
+           ;;
+
+changequote(,)dnl
+         i[34567]86 )
+changequote([,])dnl
+           gl_cv_host_cpu_c_abi_32bit=yes
+           ;;
+
+         x86_64 )
+           # On x86_64 systems, the C compiler may be generating code in one of
+           # these ABIs:
+           # - 64-bit instruction set, 64-bit pointers, 64-bit 'long': x86_64.
+           # - 64-bit instruction set, 64-bit pointers, 32-bit 'long': x86_64
+           #   with native Windows (mingw, MSVC).
+           # - 64-bit instruction set, 32-bit pointers, 32-bit 'long': x86_64-x32.
+           # - 32-bit instruction set, 32-bit pointers, 32-bit 'long': i386.
+           AC_COMPILE_IFELSE(
+             [AC_LANG_SOURCE(
+                [[#if (defined __x86_64__ || defined __amd64__ \
+                       || defined _M_X64 || defined _M_AMD64) \
+                      && !(defined __ILP32__ || defined _ILP32)
+                   int ok;
+                  #else
+                   error fail
+                  #endif
+                ]])],
+             [gl_cv_host_cpu_c_abi_32bit=no],
+             [gl_cv_host_cpu_c_abi_32bit=yes])
+           ;;
+
+         arm* | aarch64 )
+           # Assume arm with EABI.
+           # On arm64 systems, the C compiler may be generating code in one of
+           # these ABIs:
+           # - aarch64 instruction set, 64-bit pointers, 64-bit 'long': arm64.
+           # - aarch64 instruction set, 32-bit pointers, 32-bit 'long': arm64-ilp32.
+           # - 32-bit instruction set, 32-bit pointers, 32-bit 'long': arm or armhf.
+           AC_COMPILE_IFELSE(
+             [AC_LANG_SOURCE(
+                [[#if defined __aarch64__ && !(defined __ILP32__ || defined _ILP32)
+                   int ok;
+                  #else
+                   error fail
+                  #endif
+                ]])],
+             [gl_cv_host_cpu_c_abi_32bit=no],
+             [gl_cv_host_cpu_c_abi_32bit=yes])
+           ;;
+
+         hppa1.0 | hppa1.1 | hppa2.0* | hppa64 )
+           # On hppa, the C compiler may be generating 32-bit code or 64-bit
+           # code. In the latter case, it defines _LP64 and __LP64__.
+           AC_COMPILE_IFELSE(
+             [AC_LANG_SOURCE(
+                [[#ifdef __LP64__
+                   int ok;
+                  #else
+                   error fail
+                  #endif
+                ]])],
+             [gl_cv_host_cpu_c_abi_32bit=no],
+             [gl_cv_host_cpu_c_abi_32bit=yes])
+           ;;
+
+         ia64* )
+           # On ia64 on HP-UX, the C compiler may be generating 64-bit code or
+           # 32-bit code. In the latter case, it defines _ILP32.
+           AC_COMPILE_IFELSE(
+             [AC_LANG_SOURCE(
+                [[#ifdef _ILP32
+                   int ok;
+                  #else
+                   error fail
+                  #endif
+                ]])],
+             [gl_cv_host_cpu_c_abi_32bit=yes],
+             [gl_cv_host_cpu_c_abi_32bit=no])
+           ;;
+
+         mips* )
+           # We should also check for (_MIPS_SZPTR == 64), but gcc keeps this
+           # at 32.
+           AC_COMPILE_IFELSE(
+             [AC_LANG_SOURCE(
+                [[#if defined _MIPS_SZLONG && (_MIPS_SZLONG == 64)
+                   int ok;
+                  #else
+                   error fail
+                  #endif
+                ]])],
+             [gl_cv_host_cpu_c_abi_32bit=no],
+             [gl_cv_host_cpu_c_abi_32bit=yes])
+           ;;
+
+         powerpc* )
+           # Different ABIs are in use on AIX vs. Mac OS X vs. Linux,*BSD.
+           # No need to distinguish them here; the caller may distinguish
+           # them based on the OS.
+           # On powerpc64 systems, the C compiler may still be generating
+           # 32-bit code. And on powerpc-ibm-aix systems, the C compiler may
+           # be generating 64-bit code.
+           AC_COMPILE_IFELSE(
+             [AC_LANG_SOURCE(
+                [[#if defined __powerpc64__ || defined __LP64__
+                   int ok;
+                  #else
+                   error fail
+                  #endif
+                ]])],
+             [gl_cv_host_cpu_c_abi_32bit=no],
+             [gl_cv_host_cpu_c_abi_32bit=yes])
+           ;;
+
+         rs6000 )
+           gl_cv_host_cpu_c_abi_32bit=yes
+           ;;
+
+         riscv32 | riscv64 )
+           # There are 6 ABIs: ilp32, ilp32f, ilp32d, lp64, lp64f, lp64d.
+           # Size of 'long' and 'void *':
+           AC_COMPILE_IFELSE(
+             [AC_LANG_SOURCE(
+                [[#if defined __LP64__
+                    int ok;
+                  #else
+                    error fail
+                  #endif
+                ]])],
+             [gl_cv_host_cpu_c_abi_32bit=no],
+             [gl_cv_host_cpu_c_abi_32bit=yes])
+           ;;
+
+         s390* )
+           # On s390x, the C compiler may be generating 64-bit (= s390x) code
+           # or 31-bit (= s390) code.
+           AC_COMPILE_IFELSE(
+             [AC_LANG_SOURCE(
+                [[#if defined __LP64__ || defined __s390x__
+                    int ok;
+                  #else
+                    error fail
+                  #endif
+                ]])],
+             [gl_cv_host_cpu_c_abi_32bit=no],
+             [gl_cv_host_cpu_c_abi_32bit=yes])
+           ;;
+
+         sparc | sparc64 )
+           # UltraSPARCs running Linux have `uname -m` = "sparc64", but the
+           # C compiler still generates 32-bit code.
+           AC_COMPILE_IFELSE(
+             [AC_LANG_SOURCE(
+                [[#if defined __sparcv9 || defined __arch64__
+                   int ok;
+                  #else
+                   error fail
+                  #endif
+                ]])],
+             [gl_cv_host_cpu_c_abi_32bit=no],
+             [gl_cv_host_cpu_c_abi_32bit=yes])
+           ;;
+
+         *)
+           gl_cv_host_cpu_c_abi_32bit=unknown
+           ;;
+       esac
+     fi
+    ])
+
+  HOST_CPU_C_ABI_32BIT="$gl_cv_host_cpu_c_abi_32bit"
+])
diff --git a/src/grep/m4/i-ring.m4 b/src/grep/m4/i-ring.m4
new file mode 100644
index 0000000..fb2e850
--- /dev/null
+++ b/src/grep/m4/i-ring.m4
@@ -0,0 +1,10 @@
+# serial 2
+dnl Copyright (C) 2006, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_I_RING],
+[
+  :
+])
diff --git a/src/grep/m4/iconv.m4 b/src/grep/m4/iconv.m4
new file mode 100644
index 0000000..d0e61de
--- /dev/null
+++ b/src/grep/m4/iconv.m4
@@ -0,0 +1,283 @@
+# iconv.m4 serial 24
+dnl Copyright (C) 2000-2002, 2007-2014, 2016-2021 Free Software Foundation,
+dnl Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+
+AC_PREREQ([2.64])
+
+dnl Note: AM_ICONV is documented in the GNU gettext manual
+dnl <https://www.gnu.org/software/gettext/manual/html_node/AM_005fICONV.html>.
+dnl Don't make changes that are incompatible with that documentation!
+
+AC_DEFUN([AM_ICONV_LINKFLAGS_BODY],
+[
+  dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
+  AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
+  AC_REQUIRE([AC_LIB_RPATH])
+
+  dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
+  dnl accordingly.
+  AC_LIB_LINKFLAGS_BODY([iconv])
+])
+
+AC_DEFUN([AM_ICONV_LINK],
+[
+  dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
+  dnl those with the standalone portable GNU libiconv installed).
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+  dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
+  dnl accordingly.
+  AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
+
+  dnl Add $INCICONV to CPPFLAGS before performing the following checks,
+  dnl because if the user has installed libiconv and not disabled its use
+  dnl via --without-libiconv-prefix, he wants to use it. The first
+  dnl AC_LINK_IFELSE will then fail, the second AC_LINK_IFELSE will succeed.
+  am_save_CPPFLAGS="$CPPFLAGS"
+  AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
+
+  AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [
+    am_cv_func_iconv="no, consider installing GNU libiconv"
+    am_cv_lib_iconv=no
+    AC_LINK_IFELSE(
+      [AC_LANG_PROGRAM(
+         [[
+#include <stdlib.h>
+#include <iconv.h>
+         ]],
+         [[iconv_t cd = iconv_open("","");
+           iconv(cd,NULL,NULL,NULL,NULL);
+           iconv_close(cd);]])],
+      [am_cv_func_iconv=yes])
+    if test "$am_cv_func_iconv" != yes; then
+      am_save_LIBS="$LIBS"
+      LIBS="$LIBS $LIBICONV"
+      AC_LINK_IFELSE(
+        [AC_LANG_PROGRAM(
+           [[
+#include <stdlib.h>
+#include <iconv.h>
+           ]],
+           [[iconv_t cd = iconv_open("","");
+             iconv(cd,NULL,NULL,NULL,NULL);
+             iconv_close(cd);]])],
+        [am_cv_lib_iconv=yes]
+        [am_cv_func_iconv=yes])
+      LIBS="$am_save_LIBS"
+    fi
+  ])
+  if test "$am_cv_func_iconv" = yes; then
+    AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [
+      dnl This tests against bugs in AIX 5.1, AIX 6.1..7.1, HP-UX 11.11,
+      dnl Solaris 10.
+      am_save_LIBS="$LIBS"
+      if test $am_cv_lib_iconv = yes; then
+        LIBS="$LIBS $LIBICONV"
+      fi
+      am_cv_func_iconv_works=no
+      for ac_iconv_const in '' 'const'; do
+        AC_RUN_IFELSE(
+          [AC_LANG_PROGRAM(
+             [[
+#include <iconv.h>
+#include <string.h>
+
+#ifndef ICONV_CONST
+# define ICONV_CONST $ac_iconv_const
+#endif
+             ]],
+             [[int result = 0;
+  /* Test against AIX 5.1...7.2 bug: Failures are not distinguishable from
+     successful returns.  This is even documented in
+     <https://www.ibm.com/support/knowledgecenter/ssw_aix_72/i_bostechref/iconv.html> */
+  {
+    iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
+    if (cd_utf8_to_88591 != (iconv_t)(-1))
+      {
+        static ICONV_CONST char input[] = "\342\202\254"; /* EURO SIGN */
+        char buf[10];
+        ICONV_CONST char *inptr = input;
+        size_t inbytesleft = strlen (input);
+        char *outptr = buf;
+        size_t outbytesleft = sizeof (buf);
+        size_t res = iconv (cd_utf8_to_88591,
+                            &inptr, &inbytesleft,
+                            &outptr, &outbytesleft);
+        if (res == 0)
+          result |= 1;
+        iconv_close (cd_utf8_to_88591);
+      }
+  }
+  /* Test against Solaris 10 bug: Failures are not distinguishable from
+     successful returns.  */
+  {
+    iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646");
+    if (cd_ascii_to_88591 != (iconv_t)(-1))
+      {
+        static ICONV_CONST char input[] = "\263";
+        char buf[10];
+        ICONV_CONST char *inptr = input;
+        size_t inbytesleft = strlen (input);
+        char *outptr = buf;
+        size_t outbytesleft = sizeof (buf);
+        size_t res = iconv (cd_ascii_to_88591,
+                            &inptr, &inbytesleft,
+                            &outptr, &outbytesleft);
+        if (res == 0)
+          result |= 2;
+        iconv_close (cd_ascii_to_88591);
+      }
+  }
+  /* Test against AIX 6.1..7.1 bug: Buffer overrun.  */
+  {
+    iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1");
+    if (cd_88591_to_utf8 != (iconv_t)(-1))
+      {
+        static ICONV_CONST char input[] = "\304";
+        static char buf[2] = { (char)0xDE, (char)0xAD };
+        ICONV_CONST char *inptr = input;
+        size_t inbytesleft = 1;
+        char *outptr = buf;
+        size_t outbytesleft = 1;
+        size_t res = iconv (cd_88591_to_utf8,
+                            &inptr, &inbytesleft,
+                            &outptr, &outbytesleft);
+        if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD)
+          result |= 4;
+        iconv_close (cd_88591_to_utf8);
+      }
+  }
+#if 0 /* This bug could be worked around by the caller.  */
+  /* Test against HP-UX 11.11 bug: Positive return value instead of 0.  */
+  {
+    iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
+    if (cd_88591_to_utf8 != (iconv_t)(-1))
+      {
+        static ICONV_CONST char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
+        char buf[50];
+        ICONV_CONST char *inptr = input;
+        size_t inbytesleft = strlen (input);
+        char *outptr = buf;
+        size_t outbytesleft = sizeof (buf);
+        size_t res = iconv (cd_88591_to_utf8,
+                            &inptr, &inbytesleft,
+                            &outptr, &outbytesleft);
+        if ((int)res > 0)
+          result |= 8;
+        iconv_close (cd_88591_to_utf8);
+      }
+  }
+#endif
+  /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
+     provided.  */
+  {
+    /* Try standardized names.  */
+    iconv_t cd1 = iconv_open ("UTF-8", "EUC-JP");
+    /* Try IRIX, OSF/1 names.  */
+    iconv_t cd2 = iconv_open ("UTF-8", "eucJP");
+    /* Try AIX names.  */
+    iconv_t cd3 = iconv_open ("UTF-8", "IBM-eucJP");
+    /* Try HP-UX names.  */
+    iconv_t cd4 = iconv_open ("utf8", "eucJP");
+    if (cd1 == (iconv_t)(-1) && cd2 == (iconv_t)(-1)
+        && cd3 == (iconv_t)(-1) && cd4 == (iconv_t)(-1))
+      result |= 16;
+    if (cd1 != (iconv_t)(-1))
+      iconv_close (cd1);
+    if (cd2 != (iconv_t)(-1))
+      iconv_close (cd2);
+    if (cd3 != (iconv_t)(-1))
+      iconv_close (cd3);
+    if (cd4 != (iconv_t)(-1))
+      iconv_close (cd4);
+  }
+  return result;
+]])],
+          [am_cv_func_iconv_works=yes], ,
+          [case "$host_os" in
+             aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
+             *)            am_cv_func_iconv_works="guessing yes" ;;
+           esac])
+        test "$am_cv_func_iconv_works" = no || break
+      done
+      LIBS="$am_save_LIBS"
+    ])
+    case "$am_cv_func_iconv_works" in
+      *no) am_func_iconv=no am_cv_lib_iconv=no ;;
+      *)   am_func_iconv=yes ;;
+    esac
+  else
+    am_func_iconv=no am_cv_lib_iconv=no
+  fi
+  if test "$am_func_iconv" = yes; then
+    AC_DEFINE([HAVE_ICONV], [1],
+      [Define if you have the iconv() function and it works.])
+  fi
+  if test "$am_cv_lib_iconv" = yes; then
+    AC_MSG_CHECKING([how to link with libiconv])
+    AC_MSG_RESULT([$LIBICONV])
+  else
+    dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
+    dnl either.
+    CPPFLAGS="$am_save_CPPFLAGS"
+    LIBICONV=
+    LTLIBICONV=
+  fi
+  AC_SUBST([LIBICONV])
+  AC_SUBST([LTLIBICONV])
+])
+
+dnl Define AM_ICONV using AC_DEFUN_ONCE, in order to avoid warnings like
+dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required".
+dnl This is tricky because of the way 'aclocal' is implemented:
+dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN.
+dnl   Otherwise aclocal's initial scan pass would miss the macro definition.
+dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions.
+dnl   Otherwise aclocal would emit many "Use of uninitialized value $1"
+dnl   warnings.
+AC_DEFUN_ONCE([AM_ICONV],
+[
+  AM_ICONV_LINK
+  if test "$am_cv_func_iconv" = yes; then
+    AC_CACHE_CHECK([whether iconv is compatible with its POSIX signature],
+      [gl_cv_iconv_nonconst],
+      [AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[
+#include <stdlib.h>
+#include <iconv.h>
+extern
+#ifdef __cplusplus
+"C"
+#endif
+size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
+            ]],
+            [[]])],
+         [gl_cv_iconv_nonconst=yes],
+         [gl_cv_iconv_nonconst=no])
+      ])
+  else
+    dnl When compiling GNU libiconv on a system that does not have iconv yet,
+    dnl pick the POSIX compliant declaration without 'const'.
+    gl_cv_iconv_nonconst=yes
+  fi
+  if test $gl_cv_iconv_nonconst = yes; then
+    iconv_arg1=""
+  else
+    iconv_arg1="const"
+  fi
+  AC_DEFINE_UNQUOTED([ICONV_CONST], [$iconv_arg1],
+    [Define as const if the declaration of iconv() needs const.])
+  dnl Also substitute ICONV_CONST in the gnulib generated <iconv.h>.
+  m4_ifdef([gl_ICONV_H_DEFAULTS],
+    [AC_REQUIRE([gl_ICONV_H_DEFAULTS])
+     if test $gl_cv_iconv_nonconst != yes; then
+       ICONV_CONST="const"
+     fi
+    ])
+])
diff --git a/src/grep/m4/iconv_h.m4 b/src/grep/m4/iconv_h.m4
new file mode 100644
index 0000000..2940988
--- /dev/null
+++ b/src/grep/m4/iconv_h.m4
@@ -0,0 +1,72 @@
+# iconv_h.m4 serial 15
+dnl Copyright (C) 2007-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN_ONCE([gl_ICONV_H],
+[
+  AC_REQUIRE([gl_ICONV_H_DEFAULTS])
+
+  dnl Execute this unconditionally, because ICONV_H may be set by other
+  dnl modules, after this code is executed.
+  gl_CHECK_NEXT_HEADERS([iconv.h])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use, and which is not
+  dnl guaranteed by C89.
+  gl_WARN_ON_USE_PREPARE([[#include <iconv.h>
+    ]], [iconv iconv_open])
+
+  AC_REQUIRE([AC_C_RESTRICT])
+])
+
+dnl Unconditionally enables the replacement of <iconv.h>.
+AC_DEFUN([gl_REPLACE_ICONV_H],
+[
+  gl_ICONV_H_REQUIRE_DEFAULTS
+  ICONV_H='iconv.h'
+  AM_CONDITIONAL([GL_GENERATE_ICONV_H], [test -n "$ICONV_H"])
+])
+
+# gl_ICONV_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_ICONV_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_ICONV_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_ICONV_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_ICONV_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ICONV])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_ICONV_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_ICONV_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_ICONV_H_DEFAULTS],
+[
+  m4_ifdef([gl_ANSI_CXX], [AC_REQUIRE([gl_ANSI_CXX])])
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  ICONV_CONST=;         AC_SUBST([ICONV_CONST])
+  REPLACE_ICONV=0;      AC_SUBST([REPLACE_ICONV])
+  REPLACE_ICONV_OPEN=0; AC_SUBST([REPLACE_ICONV_OPEN])
+  REPLACE_ICONV_UTF=0;  AC_SUBST([REPLACE_ICONV_UTF])
+  ICONV_H='';           AC_SUBST([ICONV_H])
+  m4_ifdef([gl_POSIXCHECK],
+    [ICONV_H='iconv.h'],
+    [if m4_ifdef([gl_ANSI_CXX], [test "$CXX" != no], [false]); then
+       dnl Override <fnmatch.h> always, to support the C++ GNULIB_NAMESPACE.
+       ICONV_H='iconv.h'
+     fi
+    ])
+  AM_CONDITIONAL([GL_GENERATE_ICONV_H], [test -n "$ICONV_H"])
+])
diff --git a/src/grep/m4/iconv_open.m4 b/src/grep/m4/iconv_open.m4
new file mode 100644
index 0000000..61b6af4
--- /dev/null
+++ b/src/grep/m4/iconv_open.m4
@@ -0,0 +1,60 @@
+# iconv_open.m4 serial 16
+dnl Copyright (C) 2007-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_ICONV_OPEN],
+[
+  AC_REQUIRE([AM_ICONV])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([gl_ICONV_H_DEFAULTS])
+  if test "$am_cv_func_iconv" = yes; then
+    dnl Provide the <iconv.h> override, for the sake of the C++ aliases.
+    gl_REPLACE_ICONV_H
+    dnl Test whether iconv_open accepts standardized encoding names.
+    dnl We know that GNU libiconv and GNU libc do.
+    AC_EGREP_CPP([gnu_iconv], [
+      #include <iconv.h>
+      #if defined _LIBICONV_VERSION || (defined __GLIBC__ && !defined __UCLIBC__)
+       gnu_iconv
+      #endif
+      ], [gl_func_iconv_gnu=yes], [gl_func_iconv_gnu=no])
+    if test $gl_func_iconv_gnu = no; then
+      iconv_flavor=
+      case "$host_os" in
+        aix*)         iconv_flavor=ICONV_FLAVOR_AIX ;;
+        irix*)        iconv_flavor=ICONV_FLAVOR_IRIX ;;
+        hpux*)        iconv_flavor=ICONV_FLAVOR_HPUX ;;
+        osf*)         iconv_flavor=ICONV_FLAVOR_OSF ;;
+        solaris*)     iconv_flavor=ICONV_FLAVOR_SOLARIS ;;
+        openedition*) iconv_flavor=ICONV_FLAVOR_ZOS ;;
+      esac
+      if test -n "$iconv_flavor"; then
+        AC_DEFINE_UNQUOTED([ICONV_FLAVOR], [$iconv_flavor],
+          [Define to a symbolic name denoting the flavor of iconv_open()
+           implementation.])
+        gl_REPLACE_ICONV_OPEN
+      fi
+    fi
+    m4_ifdef([gl_FUNC_ICONV_OPEN_UTF_SUPPORT], [
+      gl_FUNC_ICONV_OPEN_UTF_SUPPORT
+      case "$gl_cv_func_iconv_supports_utf" in
+        *yes) ;;
+        *)
+          REPLACE_ICONV_UTF=1
+          AC_DEFINE([REPLACE_ICONV_UTF], [1],
+            [Define if the iconv() functions are enhanced to handle the UTF-{16,32}{BE,LE} encodings.])
+          REPLACE_ICONV=1
+          gl_REPLACE_ICONV_OPEN
+          ;;
+      esac
+    ])
+  fi
+])
+
+AC_DEFUN([gl_REPLACE_ICONV_OPEN],
+[
+  gl_REPLACE_ICONV_H
+  REPLACE_ICONV_OPEN=1
+])
diff --git a/src/grep/m4/include_next.m4 b/src/grep/m4/include_next.m4
new file mode 100644
index 0000000..bdd542b
--- /dev/null
+++ b/src/grep/m4/include_next.m4
@@ -0,0 +1,224 @@
+# include_next.m4 serial 26
+dnl Copyright (C) 2006-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Paul Eggert and Derek Price.
+
+dnl Sets INCLUDE_NEXT, INCLUDE_NEXT_AS_FIRST_DIRECTIVE, PRAGMA_SYSTEM_HEADER,
+dnl and PRAGMA_COLUMNS.
+dnl
+dnl INCLUDE_NEXT expands to 'include_next' if the compiler supports it, or to
+dnl 'include' otherwise.
+dnl
+dnl INCLUDE_NEXT_AS_FIRST_DIRECTIVE expands to 'include_next' if the compiler
+dnl supports it in the special case that it is the first include directive in
+dnl the given file, or to 'include' otherwise.
+dnl
+dnl PRAGMA_SYSTEM_HEADER can be used in files that contain #include_next,
+dnl so as to avoid GCC warnings when the gcc option -pedantic is used.
+dnl '#pragma GCC system_header' has the same effect as if the file was found
+dnl through the include search path specified with '-isystem' options (as
+dnl opposed to the search path specified with '-I' options). Namely, gcc
+dnl does not warn about some things, and on some systems (Solaris and Interix)
+dnl __STDC__ evaluates to 0 instead of to 1. The latter is an undesired side
+dnl effect; we are therefore careful to use 'defined __STDC__' or '1' instead
+dnl of plain '__STDC__'.
+dnl
+dnl PRAGMA_COLUMNS can be used in files that override system header files, so
+dnl as to avoid compilation errors on HP NonStop systems when the gnulib file
+dnl is included by a system header file that does a "#pragma COLUMNS 80" (which
+dnl has the effect of truncating the lines of that file and all files that it
+dnl includes to 80 columns) and the gnulib file has lines longer than 80
+dnl columns.
+
+AC_DEFUN([gl_INCLUDE_NEXT],
+[
+  AC_LANG_PREPROC_REQUIRE()
+  AC_CACHE_CHECK([whether the preprocessor supports include_next],
+    [gl_cv_have_include_next],
+    [rm -rf conftestd1a conftestd1b conftestd2
+     mkdir conftestd1a conftestd1b conftestd2
+     dnl IBM C 9.0, 10.1 (original versions, prior to the 2009-01 updates) on
+     dnl AIX 6.1 support include_next when used as first preprocessor directive
+     dnl in a file, but not when preceded by another include directive. Check
+     dnl for this bug by including <stdio.h>.
+     dnl Additionally, with this same compiler, include_next is a no-op when
+     dnl used in a header file that was included by specifying its absolute
+     dnl file name. Despite these two bugs, include_next is used in the
+     dnl compiler's <math.h>. By virtue of the second bug, we need to use
+     dnl include_next as well in this case.
+     cat <<EOF > conftestd1a/conftest.h
+#define DEFINED_IN_CONFTESTD1
+#include_next <conftest.h>
+#ifdef DEFINED_IN_CONFTESTD2
+int foo;
+#else
+#error "include_next doesn't work"
+#endif
+EOF
+     cat <<EOF > conftestd1b/conftest.h
+#define DEFINED_IN_CONFTESTD1
+#include <stdio.h>
+#include_next <conftest.h>
+#ifdef DEFINED_IN_CONFTESTD2
+int foo;
+#else
+#error "include_next doesn't work"
+#endif
+EOF
+     cat <<EOF > conftestd2/conftest.h
+#ifndef DEFINED_IN_CONFTESTD1
+#error "include_next test doesn't work"
+#endif
+#define DEFINED_IN_CONFTESTD2
+EOF
+     gl_save_CPPFLAGS="$CPPFLAGS"
+     CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1b -Iconftestd2"
+dnl We intentionally avoid using AC_LANG_SOURCE here.
+     AC_COMPILE_IFELSE([AC_LANG_DEFINES_PROVIDED[#include <conftest.h>]],
+       [gl_cv_have_include_next=yes],
+       [CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1a -Iconftestd2"
+        AC_COMPILE_IFELSE([AC_LANG_DEFINES_PROVIDED[#include <conftest.h>]],
+          [gl_cv_have_include_next=buggy],
+          [gl_cv_have_include_next=no])
+       ])
+     CPPFLAGS="$gl_save_CPPFLAGS"
+     rm -rf conftestd1a conftestd1b conftestd2
+    ])
+  PRAGMA_SYSTEM_HEADER=
+  if test $gl_cv_have_include_next = yes; then
+    INCLUDE_NEXT=include_next
+    INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next
+    if test -n "$GCC"; then
+      PRAGMA_SYSTEM_HEADER='#pragma GCC system_header'
+    fi
+  else
+    if test $gl_cv_have_include_next = buggy; then
+      INCLUDE_NEXT=include
+      INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next
+    else
+      INCLUDE_NEXT=include
+      INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include
+    fi
+  fi
+  AC_SUBST([INCLUDE_NEXT])
+  AC_SUBST([INCLUDE_NEXT_AS_FIRST_DIRECTIVE])
+  AC_SUBST([PRAGMA_SYSTEM_HEADER])
+
+  dnl HP NonStop systems, which define __TANDEM, limit the line length
+  dnl after including some system header files.
+  AC_CACHE_CHECK([whether source code line length is unlimited],
+    [gl_cv_source_line_length_unlimited],
+    [AC_EGREP_CPP([choke me],
+       [
+#ifdef __TANDEM
+choke me
+#endif
+       ],
+       [gl_cv_source_line_length_unlimited=no],
+       [gl_cv_source_line_length_unlimited=yes])
+    ])
+  if test $gl_cv_source_line_length_unlimited = no; then
+    PRAGMA_COLUMNS="#pragma COLUMNS 10000"
+  else
+    PRAGMA_COLUMNS=
+  fi
+  AC_SUBST([PRAGMA_COLUMNS])
+])
+
+# gl_CHECK_NEXT_HEADERS(HEADER1 HEADER2 ...)
+# ------------------------------------------
+# For each arg foo.h, if #include_next works, define NEXT_FOO_H to be
+# '<foo.h>'; otherwise define it to be
+# '"///usr/include/foo.h"', or whatever other absolute file name is suitable.
+# Also, if #include_next works as first preprocessing directive in a file,
+# define NEXT_AS_FIRST_DIRECTIVE_FOO_H to be '<foo.h>'; otherwise define it to
+# be
+# '"///usr/include/foo.h"', or whatever other absolute file name is suitable.
+# That way, a header file with the following line:
+#       #@INCLUDE_NEXT@ @NEXT_FOO_H@
+# or
+#       #@INCLUDE_NEXT_AS_FIRST_DIRECTIVE@ @NEXT_AS_FIRST_DIRECTIVE_FOO_H@
+# behaves (after sed substitution) as if it contained
+#       #include_next <foo.h>
+# even if the compiler does not support include_next.
+# The three "///" are to pacify Sun C 5.8, which otherwise would say
+# "warning: #include of /usr/include/... may be non-portable".
+# Use '""', not '<>', so that the /// cannot be confused with a C99 comment.
+# Note: This macro assumes that the header file is not empty after
+# preprocessing, i.e. it does not only define preprocessor macros but also
+# provides some type/enum definitions or function/variable declarations.
+#
+# This macro also checks whether each header exists, by invoking
+# AC_CHECK_HEADERS_ONCE or AC_CHECK_HEADERS on each argument.
+AC_DEFUN([gl_CHECK_NEXT_HEADERS],
+[
+  gl_NEXT_HEADERS_INTERNAL([$1], [check])
+])
+
+# gl_NEXT_HEADERS(HEADER1 HEADER2 ...)
+# ------------------------------------
+# Like gl_CHECK_NEXT_HEADERS, except do not check whether the headers exist.
+# This is suitable for headers like <stddef.h> that are standardized by C89
+# and therefore can be assumed to exist.
+AC_DEFUN([gl_NEXT_HEADERS],
+[
+  gl_NEXT_HEADERS_INTERNAL([$1], [assume])
+])
+
+# The guts of gl_CHECK_NEXT_HEADERS and gl_NEXT_HEADERS.
+AC_DEFUN([gl_NEXT_HEADERS_INTERNAL],
+[
+  AC_REQUIRE([gl_INCLUDE_NEXT])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+
+  m4_if([$2], [check],
+    [AC_CHECK_HEADERS_ONCE([$1])
+    ])
+
+  m4_foreach_w([gl_HEADER_NAME], [$1],
+    [AS_VAR_PUSHDEF([gl_next_header],
+                    [gl_cv_next_]m4_defn([gl_HEADER_NAME]))
+     if test $gl_cv_have_include_next = yes; then
+       AS_VAR_SET([gl_next_header], ['<'gl_HEADER_NAME'>'])
+     else
+       AC_CACHE_CHECK(
+         [absolute name of <]m4_defn([gl_HEADER_NAME])[>],
+         [gl_next_header],
+         [m4_if([$2], [check],
+            [AS_VAR_PUSHDEF([gl_header_exists],
+                            [ac_cv_header_]m4_defn([gl_HEADER_NAME]))
+             if test AS_VAR_GET([gl_header_exists]) = yes; then
+             AS_VAR_POPDEF([gl_header_exists])
+            ])
+           gl_ABSOLUTE_HEADER_ONE(gl_HEADER_NAME)
+           AS_VAR_COPY([gl_header], [gl_cv_absolute_]AS_TR_SH(gl_HEADER_NAME))
+           AS_VAR_SET([gl_next_header], ['"'$gl_header'"'])
+          m4_if([$2], [check],
+            [else
+               AS_VAR_SET([gl_next_header], ['<'gl_HEADER_NAME'>'])
+             fi
+            ])
+         ])
+     fi
+     AC_SUBST(
+       AS_TR_CPP([NEXT_]m4_defn([gl_HEADER_NAME])),
+       [AS_VAR_GET([gl_next_header])])
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'gl_HEADER_NAME'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=AS_VAR_GET([gl_next_header])
+     fi
+     AC_SUBST(
+       AS_TR_CPP([NEXT_AS_FIRST_DIRECTIVE_]m4_defn([gl_HEADER_NAME])),
+       [$gl_next_as_first_directive])
+     AS_VAR_POPDEF([gl_next_header])])
+])
+
+# Autoconf 2.68 added warnings for our use of AC_COMPILE_IFELSE;
+# this fallback is safe for all earlier autoconf versions.
+m4_define_default([AC_LANG_DEFINES_PROVIDED])
diff --git a/src/grep/m4/inet_pton.m4 b/src/grep/m4/inet_pton.m4
new file mode 100644
index 0000000..1979179
--- /dev/null
+++ b/src/grep/m4/inet_pton.m4
@@ -0,0 +1,70 @@
+# inet_pton.m4 serial 19
+dnl Copyright (C) 2006, 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_INET_PTON],
+[
+  AC_REQUIRE([gl_ARPA_INET_H_DEFAULTS])
+
+  dnl Persuade Solaris <arpa/inet.h> to declare inet_pton.
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+  AC_REQUIRE([AC_C_RESTRICT])
+
+  dnl Most platforms that provide inet_pton define it in libc.
+  dnl Solaris 8..10 provide inet_pton in libnsl instead.
+  dnl Solaris 2.6..7 provide inet_pton in libresolv instead.
+  dnl Haiku provides it in -lnetwork.
+  dnl Native Windows provides it in -lws2_32 instead, with a declaration in
+  dnl <ws2tcpip.h>, and it uses stdcall calling convention, not cdecl
+  dnl (hence we cannot use AC_CHECK_FUNCS, AC_SEARCH_LIBS to find it).
+  HAVE_INET_PTON=1
+  INET_PTON_LIB=
+  gl_PREREQ_SYS_H_WINSOCK2
+  if test $HAVE_WINSOCK2_H = 1; then
+    dnl It needs to be overridden, because the stdcall calling convention
+    dnl is not compliant with POSIX.  Set REPLACE_INET_PTON in order to avoid
+    dnl a name conflict at the linker level, even though the header file
+    dnl <ws2tcpip.h> declares inet_pton only if _WIN32_WINNT >= 0x0600.
+    REPLACE_INET_PTON=1
+    AC_CHECK_DECLS([inet_pton],,, [[#include <ws2tcpip.h>]])
+    if test $ac_cv_have_decl_inet_pton = yes; then
+      INET_PTON_LIB="-lws2_32"
+    else
+      HAVE_DECL_INET_PTON=0
+    fi
+  else
+    gl_save_LIBS=$LIBS
+    AC_SEARCH_LIBS([inet_pton], [nsl resolv network], [],
+      [AC_CHECK_FUNCS([inet_pton])
+       if test $ac_cv_func_inet_pton = no; then
+         HAVE_INET_PTON=0
+       fi
+      ])
+    LIBS=$gl_save_LIBS
+
+    if test "$ac_cv_search_inet_pton" != "no" \
+       && test "$ac_cv_search_inet_pton" != "none required"; then
+      INET_PTON_LIB="$ac_cv_search_inet_pton"
+    fi
+
+    AC_CHECK_HEADERS_ONCE([netdb.h])
+    AC_CHECK_DECLS([inet_pton],,,
+      [[#include <arpa/inet.h>
+        #if HAVE_NETDB_H
+        # include <netdb.h>
+        #endif
+      ]])
+    if test $ac_cv_have_decl_inet_pton = no; then
+      HAVE_DECL_INET_PTON=0
+    fi
+  fi
+  AC_SUBST([INET_PTON_LIB])
+])
+
+# Prerequisites of lib/inet_pton.c.
+AC_DEFUN([gl_PREREQ_INET_PTON], [
+  AC_REQUIRE([gl_SOCKET_FAMILIES])
+])
diff --git a/src/grep/m4/inline.m4 b/src/grep/m4/inline.m4
new file mode 100644
index 0000000..04fc774
--- /dev/null
+++ b/src/grep/m4/inline.m4
@@ -0,0 +1,40 @@
+# inline.m4 serial 4
+dnl Copyright (C) 2006, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Test for the 'inline' keyword or equivalent.
+dnl Define 'inline' to a supported equivalent, or to nothing if not supported,
+dnl like AC_C_INLINE does.  Also, define HAVE_INLINE if 'inline' or an
+dnl equivalent is effectively supported, i.e. if the compiler is likely to
+dnl drop unused 'static inline' functions.
+AC_DEFUN([gl_INLINE],
+[
+  AC_REQUIRE([AC_C_INLINE])
+  AC_CACHE_CHECK([whether the compiler generally respects inline],
+    [gl_cv_c_inline_effective],
+    [if test $ac_cv_c_inline = no; then
+       gl_cv_c_inline_effective=no
+     else
+       dnl GCC defines __NO_INLINE__ if not optimizing or if -fno-inline is
+       dnl specified.
+       dnl Use AC_COMPILE_IFELSE here, not AC_EGREP_CPP, because the result
+       dnl depends on optimization flags, which can be in CFLAGS.
+       dnl (AC_EGREP_CPP looks only at the CPPFLAGS.)
+       AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM([[]],
+           [[#ifdef __NO_INLINE__
+               #error "inline is not effective"
+             #endif]])],
+         [gl_cv_c_inline_effective=yes],
+         [gl_cv_c_inline_effective=no])
+     fi
+    ])
+  if test $gl_cv_c_inline_effective = yes; then
+    AC_DEFINE([HAVE_INLINE], [1],
+      [Define to 1 if the compiler supports one of the keywords
+       'inline', '__inline__', '__inline' and effectively inlines
+       functions marked as such.])
+  fi
+])
diff --git a/src/grep/m4/intl-thread-locale.m4 b/src/grep/m4/intl-thread-locale.m4
new file mode 100644
index 0000000..890fec0
--- /dev/null
+++ b/src/grep/m4/intl-thread-locale.m4
@@ -0,0 +1,219 @@
+# intl-thread-locale.m4 serial 9
+dnl Copyright (C) 2015-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+dnl
+dnl This file can be used in projects which are not available under
+dnl the GNU General Public License or the GNU Lesser General Public
+dnl License but which still want to provide support for the GNU gettext
+dnl functionality.
+dnl Please note that the actual code of the GNU gettext library is covered
+dnl by the GNU Lesser General Public License, and the rest of the GNU
+dnl gettext package is covered by the GNU General Public License.
+dnl They are *not* in the public domain.
+
+dnl Check how to retrieve the name of a per-thread locale (POSIX locale_t).
+dnl Sets gt_nameless_locales.
+AC_DEFUN([gt_INTL_THREAD_LOCALE_NAME],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+
+  dnl Persuade Solaris <locale.h> to define 'locale_t'.
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  dnl Test whether uselocale() exists and works at all.
+  gt_FUNC_USELOCALE
+
+  dnl On OpenBSD >= 6.2, the locale_t type and the uselocale(), newlocale(),
+  dnl duplocale(), freelocale() functions exist but are effectively useless,
+  dnl because the locale_t value depends only on the LC_CTYPE category of the
+  dnl locale and furthermore contains only one bit of information (it
+  dnl distinguishes the "C" locale from the *.UTF-8 locales). See
+  dnl <https://cvsweb.openbsd.org/src/lib/libc/locale/newlocale.c?rev=1.1&content-type=text/x-cvsweb-markup>.
+  dnl In the setlocale() implementation they have thought about the programs
+  dnl that use the API ("Even though only LC_CTYPE has any effect in the
+  dnl OpenBSD base system, store complete information about the global locale,
+  dnl such that third-party software can access it"), but for uselocale()
+  dnl they did not think about the programs.
+  dnl In this situation, even the HAVE_NAMELESS_LOCALES support does not work.
+  dnl So, define HAVE_FAKE_LOCALES and disable all locale_t support.
+  case "$gt_cv_func_uselocale_works" in
+    *yes)
+      AC_CHECK_HEADERS_ONCE([xlocale.h])
+      AC_CACHE_CHECK([for fake locale system (OpenBSD)],
+        [gt_cv_locale_fake],
+        [AC_RUN_IFELSE(
+           [AC_LANG_SOURCE([[
+#include <locale.h>
+#if HAVE_XLOCALE_H
+# include <xlocale.h>
+#endif
+int main ()
+{
+  locale_t loc1, loc2;
+  if (setlocale (LC_ALL, "de_DE.UTF-8") == NULL) return 1;
+  if (setlocale (LC_ALL, "fr_FR.UTF-8") == NULL) return 1;
+  loc1 = newlocale (LC_ALL_MASK, "de_DE.UTF-8", (locale_t)0);
+  loc2 = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", (locale_t)0);
+  return !(loc1 == loc2);
+}]])],
+           [gt_cv_locale_fake=yes],
+           [gt_cv_locale_fake=no],
+           [dnl Guess the locale system is fake only on OpenBSD.
+            case "$host_os" in
+              openbsd*) gt_cv_locale_fake="guessing yes" ;;
+              *)        gt_cv_locale_fake="guessing no" ;;
+            esac
+           ])
+        ])
+      ;;
+    *) gt_cv_locale_fake=no ;;
+  esac
+  case "$gt_cv_locale_fake" in
+    *yes)
+      gt_fake_locales=yes
+      AC_DEFINE([HAVE_FAKE_LOCALES], [1],
+        [Define if the locale_t type contains insufficient information, as on OpenBSD.])
+      ;;
+    *)
+      gt_fake_locales=no
+      ;;
+  esac
+
+  case "$gt_cv_func_uselocale_works" in
+    *yes)
+      AC_CACHE_CHECK([for Solaris 11.4 locale system],
+        [gt_cv_locale_solaris114],
+        [case "$host_os" in
+           solaris*)
+             dnl Test whether <locale.h> defines locale_t as a typedef of
+             dnl 'struct _LC_locale_t **' (whereas Illumos defines it as a
+             dnl typedef of 'struct _locale *').
+             dnl Another possible test would be to include <sys/localedef.h>
+             dnl and test whether it defines the _LC_core_data_locale_t type.
+             dnl This type was added in Solaris 11.4.
+             AC_COMPILE_IFELSE(
+               [AC_LANG_PROGRAM([[
+                  #include <locale.h>
+                  struct _LC_locale_t *x;
+                  locale_t y;
+                ]],
+                [[*y = x;]])],
+               [gt_cv_locale_solaris114=yes],
+               [gt_cv_locale_solaris114=no])
+             ;;
+           *) gt_cv_locale_solaris114=no ;;
+         esac
+        ])
+      ;;
+    *) gt_cv_locale_solaris114=no ;;
+  esac
+  if test $gt_cv_locale_solaris114 = yes; then
+    AC_DEFINE([HAVE_SOLARIS114_LOCALES], [1],
+      [Define if the locale_t type is as on Solaris 11.4.])
+  fi
+
+  dnl Solaris 12 will maybe provide getlocalename_l.  If it does, it will
+  dnl improve the implementation of gl_locale_name_thread(), by removing
+  dnl the use of undocumented structures.
+  case "$gt_cv_func_uselocale_works" in
+    *yes)
+      AC_CHECK_FUNCS([getlocalename_l])
+      ;;
+  esac
+
+  dnl This code is for platforms where the locale_t type does not provide access
+  dnl to the name of each locale category.  This code has the drawback that it
+  dnl requires the gnulib overrides of 'newlocale', 'duplocale', 'freelocale',
+  dnl which is a problem for GNU libunistring.  Therefore try hard to avoid
+  dnl enabling this code!
+  gt_nameless_locales=no
+  case "$host_os" in
+    dnl It's needed on AIX 7.2.
+    aix*)
+      gt_nameless_locales=yes
+      AC_DEFINE([HAVE_NAMELESS_LOCALES], [1],
+        [Define if the locale_t type does not contain the name of each locale category.])
+      ;;
+  esac
+
+  dnl We cannot support uselocale() on platforms where the locale_t type is
+  dnl fake.  So, set
+  dnl   gt_good_uselocale = gt_working_uselocale && !gt_fake_locales.
+  if test $gt_working_uselocale = yes && test $gt_fake_locales = no; then
+    gt_good_uselocale=yes
+    AC_DEFINE([HAVE_GOOD_USELOCALE], [1],
+      [Define if the uselocale exists, may be safely called, and returns sufficient information.])
+  else
+    gt_good_uselocale=no
+  fi
+
+  dnl Set gt_localename_enhances_locale_funcs to indicate whether localename.c
+  dnl overrides newlocale(), duplocale(), freelocale() to keep track of locale
+  dnl names.
+  if test $gt_good_uselocale = yes && test $gt_nameless_locales = yes; then
+    gt_localename_enhances_locale_funcs=yes
+    LOCALENAME_ENHANCE_LOCALE_FUNCS=1
+    AC_DEFINE([LOCALENAME_ENHANCE_LOCALE_FUNCS], [1],
+      [Define if localename.c overrides newlocale(), duplocale(), freelocale().])
+  else
+    gt_localename_enhances_locale_funcs=no
+  fi
+])
+
+dnl Tests whether uselocale() exists and is usable.
+dnl Sets gt_working_uselocale and defines HAVE_WORKING_USELOCALE.
+AC_DEFUN([gt_FUNC_USELOCALE],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+  dnl Persuade glibc and Solaris <locale.h> to define 'locale_t'.
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_CHECK_FUNCS_ONCE([uselocale])
+
+  dnl On AIX 7.2, the uselocale() function is not documented and leads to
+  dnl crashes in subsequent setlocale() invocations.
+  dnl In 2019, some versions of z/OS lack the locale_t type and have a broken
+  dnl uselocale function.
+  if test $ac_cv_func_uselocale = yes; then
+    AC_CHECK_HEADERS_ONCE([xlocale.h])
+    AC_CACHE_CHECK([whether uselocale works],
+      [gt_cv_func_uselocale_works],
+      [AC_RUN_IFELSE(
+         [AC_LANG_SOURCE([[
+#include <locale.h>
+#if HAVE_XLOCALE_H
+# include <xlocale.h>
+#endif
+locale_t loc1;
+int main ()
+{
+  uselocale (NULL);
+  setlocale (LC_ALL, "en_US.UTF-8");
+  return 0;
+}]])],
+         [gt_cv_func_uselocale_works=yes],
+         [gt_cv_func_uselocale_works=no],
+         [# Guess no on AIX and z/OS, yes otherwise.
+          case "$host_os" in
+            aix* | openedition*) gt_cv_func_uselocale_works="guessing no" ;;
+            *)                   gt_cv_func_uselocale_works="guessing yes" ;;
+          esac
+         ])
+      ])
+  else
+    gt_cv_func_uselocale_works=no
+  fi
+  case "$gt_cv_func_uselocale_works" in
+    *yes)
+      gt_working_uselocale=yes
+      AC_DEFINE([HAVE_WORKING_USELOCALE], [1],
+        [Define if the uselocale function exists and may safely be called.])
+      ;;
+    *)
+      gt_working_uselocale=no
+      ;;
+  esac
+])
diff --git a/src/grep/m4/intlmacosx.m4 b/src/grep/m4/intlmacosx.m4
new file mode 100644
index 0000000..4ae0d12
--- /dev/null
+++ b/src/grep/m4/intlmacosx.m4
@@ -0,0 +1,65 @@
+# intlmacosx.m4 serial 8 (gettext-0.20.2)
+dnl Copyright (C) 2004-2014, 2016, 2019-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+dnl
+dnl This file can be used in projects which are not available under
+dnl the GNU General Public License or the GNU Lesser General Public
+dnl License but which still want to provide support for the GNU gettext
+dnl functionality.
+dnl Please note that the actual code of the GNU gettext library is covered
+dnl by the GNU Lesser General Public License, and the rest of the GNU
+dnl gettext package is covered by the GNU General Public License.
+dnl They are *not* in the public domain.
+
+dnl Checks for special options needed on Mac OS X.
+dnl Defines INTL_MACOSX_LIBS.
+AC_DEFUN([gt_INTL_MACOSX],
+[
+  dnl Check for API introduced in Mac OS X 10.4.
+  AC_CACHE_CHECK([for CFPreferencesCopyAppValue],
+    [gt_cv_func_CFPreferencesCopyAppValue],
+    [gt_save_LIBS="$LIBS"
+     LIBS="$LIBS -Wl,-framework -Wl,CoreFoundation"
+     AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <CoreFoundation/CFPreferences.h>]],
+          [[CFPreferencesCopyAppValue(NULL, NULL)]])],
+       [gt_cv_func_CFPreferencesCopyAppValue=yes],
+       [gt_cv_func_CFPreferencesCopyAppValue=no])
+     LIBS="$gt_save_LIBS"])
+  if test $gt_cv_func_CFPreferencesCopyAppValue = yes; then
+    AC_DEFINE([HAVE_CFPREFERENCESCOPYAPPVALUE], [1],
+      [Define to 1 if you have the Mac OS X function CFPreferencesCopyAppValue in the CoreFoundation framework.])
+  fi
+  dnl Don't check for the API introduced in Mac OS X 10.5, CFLocaleCopyCurrent,
+  dnl because in macOS 10.13.4 it has the following behaviour:
+  dnl When two or more languages are specified in the
+  dnl "System Preferences > Language & Region > Preferred Languages" panel,
+  dnl it returns en_CC where CC is the territory (even when English is not among
+  dnl the preferred languages!).  What we want instead is what
+  dnl CFLocaleCopyCurrent returned in earlier macOS releases and what
+  dnl CFPreferencesCopyAppValue still returns, namely ll_CC where ll is the
+  dnl first among the preferred languages and CC is the territory.
+  AC_CACHE_CHECK([for CFLocaleCopyPreferredLanguages], [gt_cv_func_CFLocaleCopyPreferredLanguages],
+    [gt_save_LIBS="$LIBS"
+     LIBS="$LIBS -Wl,-framework -Wl,CoreFoundation"
+     AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <CoreFoundation/CFLocale.h>]],
+          [[CFLocaleCopyPreferredLanguages();]])],
+       [gt_cv_func_CFLocaleCopyPreferredLanguages=yes],
+       [gt_cv_func_CFLocaleCopyPreferredLanguages=no])
+     LIBS="$gt_save_LIBS"])
+  if test $gt_cv_func_CFLocaleCopyPreferredLanguages = yes; then
+    AC_DEFINE([HAVE_CFLOCALECOPYPREFERREDLANGUAGES], [1],
+      [Define to 1 if you have the Mac OS X function CFLocaleCopyPreferredLanguages in the CoreFoundation framework.])
+  fi
+  INTL_MACOSX_LIBS=
+  if test $gt_cv_func_CFPreferencesCopyAppValue = yes \
+     || test $gt_cv_func_CFLocaleCopyPreferredLanguages = yes; then
+    INTL_MACOSX_LIBS="-Wl,-framework -Wl,CoreFoundation"
+  fi
+  AC_SUBST([INTL_MACOSX_LIBS])
+])
diff --git a/src/grep/m4/intmax_t.m4 b/src/grep/m4/intmax_t.m4
new file mode 100644
index 0000000..63c4b41
--- /dev/null
+++ b/src/grep/m4/intmax_t.m4
@@ -0,0 +1,59 @@
+# intmax_t.m4 serial 9
+dnl Copyright (C) 1997-2004, 2006-2007, 2009-2021 Free Software Foundation,
+dnl Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Paul Eggert.
+
+AC_PREREQ([2.53])
+
+# Define intmax_t to 'long' or 'long long'
+# if it is not already defined in <stdint.h> or <inttypes.h>.
+
+AC_DEFUN([gl_AC_TYPE_INTMAX_T],
+[
+  dnl For simplicity, we assume that a header file defines 'intmax_t' if and
+  dnl only if it defines 'uintmax_t'.
+  AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])
+  AC_REQUIRE([gl_AC_HEADER_STDINT_H])
+  if test $gl_cv_header_inttypes_h = no && test $gl_cv_header_stdint_h = no; then
+    AC_DEFINE_UNQUOTED([intmax_t], [long long],
+     [Define to long or long long if <inttypes.h> and <stdint.h> don't define.])
+  else
+    AC_DEFINE([HAVE_INTMAX_T], [1],
+      [Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.])
+  fi
+])
+
+dnl An alternative would be to explicitly test for 'intmax_t'.
+
+AC_DEFUN([gt_AC_TYPE_INTMAX_T],
+[
+  AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])
+  AC_REQUIRE([gl_AC_HEADER_STDINT_H])
+  AC_CACHE_CHECK([for intmax_t], [gt_cv_c_intmax_t],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[
+#include <stddef.h>
+#include <stdlib.h>
+#if HAVE_STDINT_H_WITH_UINTMAX
+#include <stdint.h>
+#endif
+#if HAVE_INTTYPES_H_WITH_UINTMAX
+#include <inttypes.h>
+#endif
+          ]],
+          [[intmax_t x = -1; return !x;]])],
+       [gt_cv_c_intmax_t=yes],
+       [gt_cv_c_intmax_t=no])])
+  if test $gt_cv_c_intmax_t = yes; then
+    AC_DEFINE([HAVE_INTMAX_T], [1],
+      [Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.])
+  else
+    AC_DEFINE_UNQUOTED([intmax_t], [long long],
+     [Define to long or long long if <stdint.h> and <inttypes.h> don't define.])
+  fi
+])
diff --git a/src/grep/m4/inttostr.m4 b/src/grep/m4/inttostr.m4
new file mode 100644
index 0000000..8a50d50
--- /dev/null
+++ b/src/grep/m4/inttostr.m4
@@ -0,0 +1,32 @@
+#serial 8
+dnl Copyright (C) 2004-2006, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_INTTOSTR],
+[
+  gl_PREREQ_INTTOSTR
+  gl_PREREQ_IMAXTOSTR
+  gl_PREREQ_OFFTOSTR
+  gl_PREREQ_UMAXTOSTR
+  gl_PREREQ_UINTTOSTR
+])
+
+# Prerequisites of lib/inttostr.h.
+AC_DEFUN([gl_PREREQ_INTTOSTR], [
+  AC_REQUIRE([AC_TYPE_OFF_T])
+  :
+])
+
+# Prerequisites of lib/imaxtostr.c.
+AC_DEFUN([gl_PREREQ_IMAXTOSTR], [:])
+
+# Prerequisites of lib/offtostr.c.
+AC_DEFUN([gl_PREREQ_OFFTOSTR], [:])
+
+# Prerequisites of lib/umaxtostr.c.
+AC_DEFUN([gl_PREREQ_UMAXTOSTR], [:])
+
+# Prerequisites of lib/uinttostr.c.
+AC_DEFUN([gl_PREREQ_UINTTOSTR], [:])
diff --git a/src/grep/m4/inttypes.m4 b/src/grep/m4/inttypes.m4
new file mode 100644
index 0000000..64b1de5
--- /dev/null
+++ b/src/grep/m4/inttypes.m4
@@ -0,0 +1,180 @@
+# inttypes.m4 serial 35
+dnl Copyright (C) 2006-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Derek Price, Bruno Haible.
+dnl Test whether <inttypes.h> is supported or must be substituted.
+
+AC_DEFUN_ONCE([gl_INTTYPES_H],
+[
+  AC_REQUIRE([gl_INTTYPES_INCOMPLETE])
+  gl_INTTYPES_PRI_SCN
+])
+
+AC_DEFUN_ONCE([gl_INTTYPES_INCOMPLETE],
+[
+  AC_REQUIRE([gl_STDINT_H])
+  AC_CHECK_HEADERS_ONCE([inttypes.h])
+
+  dnl Override <inttypes.h> always, so that the portability warnings work.
+  AC_REQUIRE([gl_INTTYPES_H_DEFAULTS])
+  gl_CHECK_NEXT_HEADERS([inttypes.h])
+
+  AC_REQUIRE([gl_MULTIARCH])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[#include <inttypes.h>
+    ]], [imaxabs imaxdiv strtoimax strtoumax])
+
+  AC_REQUIRE([AC_C_RESTRICT])
+])
+
+# Ensure that the PRI* and SCN* macros are defined appropriately.
+AC_DEFUN([gl_INTTYPES_PRI_SCN],
+[
+  PRIPTR_PREFIX=
+  if test -n "$STDINT_H"; then
+    dnl Using the gnulib <stdint.h>. It defines intptr_t to 'long' or
+    dnl 'long long', depending on _WIN64.
+    AC_COMPILE_IFELSE(
+      [AC_LANG_PROGRAM([[
+         #ifdef _WIN64
+         LLP64
+         #endif
+         ]])
+      ],
+      [PRIPTR_PREFIX='"l"'],
+      [PRIPTR_PREFIX='"ll"'])
+  else
+    dnl Using the system's <stdint.h>.
+    for glpfx in '' l ll I64; do
+      case $glpfx in
+        '')  gltype1='int';;
+        l)   gltype1='long int';;
+        ll)  gltype1='long long int';;
+        I64) gltype1='__int64';;
+      esac
+      AC_COMPILE_IFELSE(
+        [AC_LANG_PROGRAM([[#include <stdint.h>
+           extern intptr_t foo;
+           extern $gltype1 foo;]])],
+        [PRIPTR_PREFIX='"'$glpfx'"'])
+      test -n "$PRIPTR_PREFIX" && break
+    done
+  fi
+  AC_SUBST([PRIPTR_PREFIX])
+
+  gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
+    [INT32_MAX_LT_INTMAX_MAX],
+    [defined INT32_MAX && defined INTMAX_MAX],
+    [INT32_MAX < INTMAX_MAX],
+    [sizeof (int) < sizeof (long long int)])
+  if test $APPLE_UNIVERSAL_BUILD = 0; then
+    gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
+      [INT64_MAX_EQ_LONG_MAX],
+      [defined INT64_MAX],
+      [INT64_MAX == LONG_MAX],
+      [sizeof (long long int) == sizeof (long int)])
+  else
+    INT64_MAX_EQ_LONG_MAX=-1
+  fi
+  gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
+    [UINT32_MAX_LT_UINTMAX_MAX],
+    [defined UINT32_MAX && defined UINTMAX_MAX],
+    [UINT32_MAX < UINTMAX_MAX],
+    [sizeof (unsigned int) < sizeof (unsigned long long int)])
+  if test $APPLE_UNIVERSAL_BUILD = 0; then
+    gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
+      [UINT64_MAX_EQ_ULONG_MAX],
+      [defined UINT64_MAX],
+      [UINT64_MAX == ULONG_MAX],
+      [sizeof (unsigned long long int) == sizeof (unsigned long int)])
+  else
+    UINT64_MAX_EQ_ULONG_MAX=-1
+  fi
+])
+
+# Define the symbol $1 to be 1 if the condition is true, 0 otherwise.
+# If $2 is true, the condition is $3; otherwise if long long int is supported
+# approximate the condition with $4; otherwise, assume the condition is false.
+# The condition should work on all C99 platforms; the approximations should be
+# good enough to work on all practical pre-C99 platforms.
+# $2 is evaluated by the C preprocessor, $3 and $4 as compile-time constants.
+AC_DEFUN([gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION],
+[
+  AC_CACHE_CHECK([whether $3],
+    [gl_cv_test_$1],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[/* Work also in C++ mode.  */
+            #define __STDC_LIMIT_MACROS 1
+
+            /* Work if build is not clean.  */
+            #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H
+
+            #include <limits.h>
+            #if HAVE_STDINT_H
+             #include <stdint.h>
+            #endif
+
+            #if $2
+             #define CONDITION ($3)
+            #else
+             #define CONDITION ($4)
+            #endif
+            int test[CONDITION ? 1 : -1];]])],
+       [gl_cv_test_$1=yes],
+       [gl_cv_test_$1=no])])
+  if test $gl_cv_test_$1 = yes; then
+    $1=1;
+  else
+    $1=0;
+  fi
+  AC_SUBST([$1])
+])
+
+# gl_INTTYPES_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_INTTYPES_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_INTTYPES_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_INTTYPES_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_INTTYPES_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_IMAXABS])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_IMAXDIV])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRTOIMAX])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRTOUMAX])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_INTTYPES_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_INTTYPES_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_INTTYPES_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_DECL_IMAXABS=1;   AC_SUBST([HAVE_DECL_IMAXABS])
+  HAVE_DECL_IMAXDIV=1;   AC_SUBST([HAVE_DECL_IMAXDIV])
+  HAVE_DECL_STRTOIMAX=1; AC_SUBST([HAVE_DECL_STRTOIMAX])
+  HAVE_DECL_STRTOUMAX=1; AC_SUBST([HAVE_DECL_STRTOUMAX])
+  HAVE_IMAXDIV_T=1;      AC_SUBST([HAVE_IMAXDIV_T])
+  REPLACE_STRTOIMAX=0;   AC_SUBST([REPLACE_STRTOIMAX])
+  REPLACE_STRTOUMAX=0;   AC_SUBST([REPLACE_STRTOUMAX])
+  INT32_MAX_LT_INTMAX_MAX=1;  AC_SUBST([INT32_MAX_LT_INTMAX_MAX])
+  INT64_MAX_EQ_LONG_MAX='defined _LP64';  AC_SUBST([INT64_MAX_EQ_LONG_MAX])
+  PRIPTR_PREFIX=__PRIPTR_PREFIX;  AC_SUBST([PRIPTR_PREFIX])
+  UINT32_MAX_LT_UINTMAX_MAX=1;  AC_SUBST([UINT32_MAX_LT_UINTMAX_MAX])
+  UINT64_MAX_EQ_ULONG_MAX='defined _LP64';  AC_SUBST([UINT64_MAX_EQ_ULONG_MAX])
+])
diff --git a/src/grep/m4/inttypes_h.m4 b/src/grep/m4/inttypes_h.m4
new file mode 100644
index 0000000..672a93e
--- /dev/null
+++ b/src/grep/m4/inttypes_h.m4
@@ -0,0 +1,29 @@
+# inttypes_h.m4 serial 10
+dnl Copyright (C) 1997-2004, 2006, 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Paul Eggert.
+
+# Define HAVE_INTTYPES_H_WITH_UINTMAX if <inttypes.h> exists,
+# doesn't clash with <sys/types.h>, and declares uintmax_t.
+
+AC_DEFUN([gl_AC_HEADER_INTTYPES_H],
+[
+  AC_CACHE_CHECK([for inttypes.h], [gl_cv_header_inttypes_h],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[
+#include <sys/types.h>
+#include <inttypes.h>
+          ]],
+          [[uintmax_t i = (uintmax_t) -1; return !i;]])],
+       [gl_cv_header_inttypes_h=yes],
+       [gl_cv_header_inttypes_h=no])])
+  if test $gl_cv_header_inttypes_h = yes; then
+    AC_DEFINE_UNQUOTED([HAVE_INTTYPES_H_WITH_UINTMAX], [1],
+      [Define if <inttypes.h> exists, doesn't clash with <sys/types.h>,
+       and declares uintmax_t. ])
+  fi
+])
diff --git a/src/grep/m4/ioctl.m4 b/src/grep/m4/ioctl.m4
new file mode 100644
index 0000000..efd29f3
--- /dev/null
+++ b/src/grep/m4/ioctl.m4
@@ -0,0 +1,44 @@
+# ioctl.m4 serial 6
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_IOCTL],
+[
+  AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])
+  AC_REQUIRE([gl_SYS_SOCKET_H])
+  HAVE_IOCTL=1
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    dnl Even if the 'socket' module is not used here, another part of the
+    dnl application may use it and pass file descriptors that refer to
+    dnl sockets to the ioctl() function. So enable the support for sockets.
+    HAVE_IOCTL=0
+  else
+    AC_CHECK_FUNCS([ioctl])
+    dnl On glibc systems, the second parameter is 'unsigned long int request',
+    dnl not 'int request'. We cannot simply cast the function pointer, but
+    dnl instead need a wrapper.
+    AC_CACHE_CHECK([for ioctl with POSIX signature],
+      [gl_cv_func_ioctl_posix_signature],
+      [AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[#include <sys/ioctl.h>
+              /* On some platforms, ioctl() is declared in <unistd.h>.  */
+              #include <unistd.h>
+            ]],
+            [[extern
+              #ifdef __cplusplus
+              "C"
+              #endif
+              int ioctl (int, int, ...);
+            ]])
+         ],
+         [gl_cv_func_ioctl_posix_signature=yes],
+         [gl_cv_func_ioctl_posix_signature=no])
+      ])
+    if test $gl_cv_func_ioctl_posix_signature != yes; then
+      REPLACE_IOCTL=1
+    fi
+  fi
+])
diff --git a/src/grep/m4/isatty.m4 b/src/grep/m4/isatty.m4
new file mode 100644
index 0000000..330dc58
--- /dev/null
+++ b/src/grep/m4/isatty.m4
@@ -0,0 +1,19 @@
+# isatty.m4 serial 3
+dnl Copyright (C) 2012-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_ISATTY],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  dnl On native Windows, the system's isatty(), defined as an alias of _isatty()
+  dnl in the "oldnames" library, returns true for the NUL device.
+  case $host_os in
+    mingw*) REPLACE_ISATTY=1 ;;
+  esac
+])
+
+# Prerequisites of lib/isatty.c.
+AC_DEFUN([gl_PREREQ_ISATTY], [:])
diff --git a/src/grep/m4/isblank.m4 b/src/grep/m4/isblank.m4
new file mode 100644
index 0000000..e77e1a8
--- /dev/null
+++ b/src/grep/m4/isblank.m4
@@ -0,0 +1,17 @@
+# isblank.m4 serial 3
+dnl Copyright (C) 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_ISBLANK],
+[
+  dnl Persuade glibc <ctype.h> to declare isblank().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_REQUIRE([gl_CTYPE_H_DEFAULTS])
+  AC_CHECK_FUNCS_ONCE([isblank])
+  if test $ac_cv_func_isblank = no; then
+    HAVE_ISBLANK=0
+  fi
+])
diff --git a/src/grep/m4/iswblank.m4 b/src/grep/m4/iswblank.m4
new file mode 100644
index 0000000..84fd838
--- /dev/null
+++ b/src/grep/m4/iswblank.m4
@@ -0,0 +1,34 @@
+# iswblank.m4 serial 5
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_ISWBLANK],
+[
+  AC_REQUIRE([gl_WCTYPE_H_DEFAULTS])
+  AC_REQUIRE([gl_WCTYPE_H])
+  dnl Persuade glibc <wctype.h> to declare iswblank().
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+  AC_CHECK_FUNCS_ONCE([iswblank])
+  AC_CHECK_DECLS([iswblank], , , [[
+    #include <wchar.h>
+    #include <wctype.h>
+  ]])
+  if test $ac_cv_func_iswblank = no; then
+    HAVE_ISWBLANK=0
+    if test $ac_cv_have_decl_iswblank = yes; then
+      REPLACE_ISWBLANK=1
+    fi
+  fi
+  if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
+    dnl Redefine all of iswcntrl, ..., towupper in <wctype.h>.
+    :
+  else
+    if test $HAVE_ISWBLANK = 0 || test $REPLACE_ISWBLANK = 1; then
+      dnl Redefine only iswblank.
+      :
+    fi
+  fi
+
+])
diff --git a/src/grep/m4/iswctype.m4 b/src/grep/m4/iswctype.m4
new file mode 100644
index 0000000..646630e
--- /dev/null
+++ b/src/grep/m4/iswctype.m4
@@ -0,0 +1,11 @@
+# iswctype.m4 serial 2
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_ISWCTYPE],
+[
+  AC_REQUIRE([gl_WCTYPE_H_DEFAULTS])
+  AC_REQUIRE([gl_WCTYPE_H])
+])
diff --git a/src/grep/m4/iswdigit.m4 b/src/grep/m4/iswdigit.m4
new file mode 100644
index 0000000..de4ffce
--- /dev/null
+++ b/src/grep/m4/iswdigit.m4
@@ -0,0 +1,115 @@
+# iswdigit.m4 serial 3
+dnl Copyright (C) 2020-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_ISWDIGIT],
+[
+  AC_REQUIRE([gl_WCTYPE_H_DEFAULTS])
+  AC_REQUIRE([gl_WCTYPE_H])
+  AC_REQUIRE([gt_LOCALE_FR])
+  AC_REQUIRE([gt_LOCALE_JA])
+  AC_REQUIRE([gt_LOCALE_FR_UTF8])
+  AC_REQUIRE([gt_LOCALE_ZH_CN])
+
+  if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
+    dnl <wctype.h> redefines iswdigit already.
+    REPLACE_ISWDIGIT="$REPLACE_ISWCNTRL"
+  else
+    AC_CACHE_CHECK([whether iswdigit is ISO C compliant],
+      [gl_cv_func_iswdigit_works],
+      [
+       dnl Initial guess, used when cross-compiling or when no suitable locale
+       dnl is present.
+changequote(,)dnl
+       case "$host_os" in
+         # Guess no on FreeBSD, NetBSD, Solaris, native Windows.
+         freebsd* | dragonfly* | netbsd* | solaris* | mingw*)
+           gl_cv_func_iswdigit_works="guessing no" ;;
+         # Guess yes otherwise.
+         *) gl_cv_func_iswdigit_works="guessing yes" ;;
+       esac
+changequote([,])dnl
+       if test $LOCALE_FR != none || test $LOCALE_JA != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_ZH_CN != none; then
+         AC_RUN_IFELSE(
+           [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#include <wctype.h>
+
+/* Returns the value of iswdigit for the multibyte character s[0..n-1].  */
+static int
+for_character (const char *s, size_t n)
+{
+  mbstate_t state;
+  wchar_t wc;
+  size_t ret;
+
+  memset (&state, '\0', sizeof (mbstate_t));
+  wc = (wchar_t) 0xBADFACE;
+  ret = mbrtowc (&wc, s, n, &state);
+  if (ret != n)
+    abort ();
+
+  return iswdigit (wc);
+}
+
+int
+main (int argc, char *argv[])
+{
+  int is;
+  int result = 0;
+
+  if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
+    {
+      /* This fails on mingw, MSVC 14.  */
+      /* U+00B2 SUPERSCRIPT TWO */
+      is = for_character ("\262", 1);
+      if (!(is == 0))
+        result |= 1;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      /* This fails on NetBSD 8.0.  */
+      /* U+FF11 FULLWIDTH DIGIT ONE */
+      is = for_character ("\243\261", 2);
+      if (!(is == 0))
+        result |= 2;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      /* This fails on FreeBSD 13.0, NetBSD 8.0, MSVC 14.  */
+      /* U+0663 ARABIC-INDIC DIGIT THREE */
+      is = for_character ("\331\243", 2);
+      if (!(is == 0))
+        result |= 4;
+      /* This fails on FreeBSD 13.0, NetBSD 8.0, MSVC 14.  */
+      /* U+FF11 FULLWIDTH DIGIT ONE */
+      is = for_character ("\357\274\221", 3);
+      if (!(is == 0))
+        result |= 8;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      /* This fails on NetBSD 8.0, Solaris 10, Solaris 11.4.  */
+      /* U+FF11 FULLWIDTH DIGIT ONE */
+      is = for_character ("\243\261", 2);
+      if (!(is == 0))
+        result |= 16;
+    }
+  return result;
+}]])],
+           [gl_cv_func_iswdigit_works=yes],
+           [gl_cv_func_iswdigit_works=no],
+           [:])
+       fi
+      ])
+    case "$gl_cv_func_iswdigit_works" in
+      *yes) ;;
+      *) REPLACE_ISWDIGIT=1 ;;
+    esac
+  fi
+])
diff --git a/src/grep/m4/iswxdigit.m4 b/src/grep/m4/iswxdigit.m4
new file mode 100644
index 0000000..f96d735
--- /dev/null
+++ b/src/grep/m4/iswxdigit.m4
@@ -0,0 +1,106 @@
+# iswxdigit.m4 serial 3
+dnl Copyright (C) 2020-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_ISWXDIGIT],
+[
+  AC_REQUIRE([gl_WCTYPE_H_DEFAULTS])
+  AC_REQUIRE([gl_WCTYPE_H])
+  AC_REQUIRE([gt_LOCALE_JA])
+  AC_REQUIRE([gt_LOCALE_FR_UTF8])
+  AC_REQUIRE([gt_LOCALE_ZH_CN])
+
+  if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
+    dnl <wctype.h> redefines iswxdigit already.
+    REPLACE_ISWXDIGIT="$REPLACE_ISWCNTRL"
+  else
+    AC_CACHE_CHECK([whether iswxdigit is ISO C compliant],
+      [gl_cv_func_iswxdigit_works],
+      [
+       dnl Initial guess, used when cross-compiling or when no suitable locale
+       dnl is present.
+changequote(,)dnl
+       case "$host_os" in
+         # Guess no on FreeBSD, NetBSD, Solaris, native Windows.
+         freebsd* | dragonfly* | netbsd* | solaris* | mingw*)
+           gl_cv_func_iswxdigit_works="guessing no" ;;
+         # Guess yes otherwise.
+         *) gl_cv_func_iswxdigit_works="guessing yes" ;;
+       esac
+changequote([,])dnl
+       if test $LOCALE_JA != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_ZH_CN != none; then
+         AC_RUN_IFELSE(
+           [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#include <wctype.h>
+
+/* Returns the value of iswxdigit for the multibyte character s[0..n-1].  */
+static int
+for_character (const char *s, size_t n)
+{
+  mbstate_t state;
+  wchar_t wc;
+  size_t ret;
+
+  memset (&state, '\0', sizeof (mbstate_t));
+  wc = (wchar_t) 0xBADFACE;
+  ret = mbrtowc (&wc, s, n, &state);
+  if (ret != n)
+    abort ();
+
+  return iswxdigit (wc);
+}
+
+int
+main (int argc, char *argv[])
+{
+  int is;
+  int result = 0;
+
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      /* This fails on NetBSD 8.0.  */
+      /* U+FF21 FULLWIDTH LATIN CAPITAL LETTER A */
+      is = for_character ("\243\301", 2);
+      if (!(is == 0))
+        result |= 1;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      /* This fails on FreeBSD 13.0.  */
+      /* U+0663 ARABIC-INDIC DIGIT THREE */
+      is = for_character ("\331\243", 2);
+      if (!(is == 0))
+        result |= 2;
+      /* This fails on MSVC 14.  */
+      /* U+FF21 FULLWIDTH LATIN CAPITAL LETTER A */
+      is = for_character ("\357\274\241", 3);
+      if (!(is == 0))
+        result |= 4;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      /* This fails on Solaris 10, Solaris 11.4.  */
+      /* U+FF11 FULLWIDTH DIGIT ONE */
+      is = for_character ("\243\261", 2);
+      if (!(is == 0))
+        result |= 8;
+    }
+  return result;
+}]])],
+           [gl_cv_func_iswxdigit_works=yes],
+           [gl_cv_func_iswxdigit_works=no],
+           [:])
+       fi
+      ])
+    case "$gl_cv_func_iswxdigit_works" in
+      *yes) ;;
+      *) REPLACE_ISWXDIGIT=1 ;;
+    esac
+  fi
+])
diff --git a/src/grep/m4/langinfo_h.m4 b/src/grep/m4/langinfo_h.m4
new file mode 100644
index 0000000..87959f7
--- /dev/null
+++ b/src/grep/m4/langinfo_h.m4
@@ -0,0 +1,137 @@
+# langinfo_h.m4 serial 12
+dnl Copyright (C) 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN_ONCE([gl_LANGINFO_H],
+[
+  AC_REQUIRE([gl_LANGINFO_H_DEFAULTS])
+
+  dnl Persuade glibc-2.0.6 <langinfo.h> to define CODESET.
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  dnl <langinfo.h> is always overridden, because of GNULIB_POSIXCHECK.
+  gl_CHECK_NEXT_HEADERS([langinfo.h])
+
+  dnl Determine whether <langinfo.h> exists. It is missing on mingw and BeOS.
+  HAVE_LANGINFO_CODESET=0
+  HAVE_LANGINFO_T_FMT_AMPM=0
+  HAVE_LANGINFO_ALTMON=0
+  HAVE_LANGINFO_ERA=0
+  HAVE_LANGINFO_YESEXPR=0
+  AC_CHECK_HEADERS_ONCE([langinfo.h])
+  if test $ac_cv_header_langinfo_h = yes; then
+    HAVE_LANGINFO_H=1
+    dnl Determine what <langinfo.h> defines.
+    dnl CODESET is missing on OpenBSD 3.8.
+    dnl ERA etc. are missing on OpenBSD 6.7.
+    dnl T_FMT_AMPM and YESEXPR, NOEXPR are missing on IRIX 5.3.
+    dnl ALTMON_* are missing on glibc 2.26 and many other systems.
+    AC_CACHE_CHECK([whether langinfo.h defines CODESET],
+      [gl_cv_header_langinfo_codeset],
+      [AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM([[#include <langinfo.h>
+int a = CODESET;
+]])],
+         [gl_cv_header_langinfo_codeset=yes],
+         [gl_cv_header_langinfo_codeset=no])
+      ])
+    if test $gl_cv_header_langinfo_codeset = yes; then
+      HAVE_LANGINFO_CODESET=1
+    fi
+    AC_CACHE_CHECK([whether langinfo.h defines T_FMT_AMPM],
+      [gl_cv_header_langinfo_t_fmt_ampm],
+      [AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM([[#include <langinfo.h>
+int a = T_FMT_AMPM;
+]])],
+         [gl_cv_header_langinfo_t_fmt_ampm=yes],
+         [gl_cv_header_langinfo_t_fmt_ampm=no])
+      ])
+    if test $gl_cv_header_langinfo_t_fmt_ampm = yes; then
+      HAVE_LANGINFO_T_FMT_AMPM=1
+    fi
+    AC_CACHE_CHECK([whether langinfo.h defines ALTMON_1],
+      [gl_cv_header_langinfo_altmon],
+      [AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM([[#include <langinfo.h>
+int a = ALTMON_1;
+]])],
+         [gl_cv_header_langinfo_altmon=yes],
+         [gl_cv_header_langinfo_altmon=no])
+      ])
+    if test $gl_cv_header_langinfo_altmon = yes; then
+      HAVE_LANGINFO_ALTMON=1
+    fi
+    AC_CACHE_CHECK([whether langinfo.h defines ERA],
+      [gl_cv_header_langinfo_era],
+      [AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM([[#include <langinfo.h>
+int a = ERA;
+]])],
+         [gl_cv_header_langinfo_era=yes],
+         [gl_cv_header_langinfo_era=no])
+      ])
+    if test $gl_cv_header_langinfo_era = yes; then
+      HAVE_LANGINFO_ERA=1
+    fi
+    AC_CACHE_CHECK([whether langinfo.h defines YESEXPR],
+      [gl_cv_header_langinfo_yesexpr],
+      [AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM([[#include <langinfo.h>
+int a = YESEXPR;
+]])],
+         [gl_cv_header_langinfo_yesexpr=yes],
+         [gl_cv_header_langinfo_yesexpr=no])
+      ])
+    if test $gl_cv_header_langinfo_yesexpr = yes; then
+      HAVE_LANGINFO_YESEXPR=1
+    fi
+  else
+    HAVE_LANGINFO_H=0
+  fi
+  AC_SUBST([HAVE_LANGINFO_H])
+  AC_SUBST([HAVE_LANGINFO_CODESET])
+  AC_SUBST([HAVE_LANGINFO_T_FMT_AMPM])
+  AC_SUBST([HAVE_LANGINFO_ALTMON])
+  AC_SUBST([HAVE_LANGINFO_ERA])
+  AC_SUBST([HAVE_LANGINFO_YESEXPR])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[#include <langinfo.h>
+    ]], [nl_langinfo])
+])
+
+# gl_LANGINFO_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_LANGINFO_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_LANGINFO_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_LANGINFO_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_LANGINFO_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_NL_LANGINFO])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_LANGINFO_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_LANGINFO_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_LANGINFO_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_NL_LANGINFO=1;    AC_SUBST([HAVE_NL_LANGINFO])
+  REPLACE_NL_LANGINFO=0; AC_SUBST([REPLACE_NL_LANGINFO])
+])
diff --git a/src/grep/m4/largefile.m4 b/src/grep/m4/largefile.m4
new file mode 100644
index 0000000..fbde5e6
--- /dev/null
+++ b/src/grep/m4/largefile.m4
@@ -0,0 +1,180 @@
+# Enable large files on systems where this is not the default.
+# Enable support for files on Linux file systems with 64-bit inode numbers.
+
+# Copyright 1992-1996, 1998-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# The following macro works around a problem in Autoconf's AC_FUNC_FSEEKO:
+# It does not set _LARGEFILE_SOURCE=1 on HP-UX/ia64 32-bit, although this
+# setting of _LARGEFILE_SOURCE is needed so that <stdio.h> declares fseeko
+# and ftello in C++ mode as well.
+AC_DEFUN([gl_SET_LARGEFILE_SOURCE],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_FUNC_FSEEKO
+  case "$host_os" in
+    hpux*)
+      AC_DEFINE([_LARGEFILE_SOURCE], [1],
+        [Define to 1 to make fseeko visible on some hosts (e.g. glibc 2.2).])
+      ;;
+  esac
+])
+
+# Work around a problem in Autoconf through at least 2.71 on glibc 2.34+
+# with _TIME_BITS.  Also, work around a problem in autoconf <= 2.69:
+# AC_SYS_LARGEFILE does not configure for large inodes on Mac OS X 10.5,
+# or configures them incorrectly in some cases.
+m4_version_prereq([2.70], [], [
+
+# _AC_SYS_LARGEFILE_TEST_INCLUDES
+# -------------------------------
+m4_define([_AC_SYS_LARGEFILE_TEST_INCLUDES],
+[#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+    We can't simply define LARGE_OFF_T to be 9223372036854775807,
+    since some C++ compilers masquerading as C compilers
+    incorrectly reject 9223372036854775807.  */
+#define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
+  int off_t_is_large[[(LARGE_OFF_T % 2147483629 == 721
+                       && LARGE_OFF_T % 2147483647 == 1)
+                      ? 1 : -1]];[]dnl
+])
+])# m4_version_prereq 2.70
+
+
+# _AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE,
+#                               CACHE-VAR,
+#                               DESCRIPTION,
+#                               PROLOGUE, [FUNCTION-BODY])
+# --------------------------------------------------------
+m4_define([_AC_SYS_LARGEFILE_MACRO_VALUE],
+[AC_CACHE_CHECK([for $1 value needed for large files], [$3],
+[while :; do
+  m4_ifval([$6], [AC_LINK_IFELSE], [AC_COMPILE_IFELSE])(
+    [AC_LANG_PROGRAM([$5], [$6])],
+    [$3=no; break])
+  m4_ifval([$6], [AC_LINK_IFELSE], [AC_COMPILE_IFELSE])(
+    [AC_LANG_PROGRAM([#undef $1
+#define $1 $2
+$5], [$6])],
+    [$3=$2; break])
+  $3=unknown
+  break
+done])
+case $$3 in #(
+  no | unknown) ;;
+  *) AC_DEFINE_UNQUOTED([$1], [$$3], [$4]);;
+esac
+rm -rf conftest*[]dnl
+])# _AC_SYS_LARGEFILE_MACRO_VALUE
+
+
+# AC_SYS_LARGEFILE
+# ----------------
+# By default, many hosts won't let programs access large files;
+# one must use special compiler options to get large-file access to work.
+# For more details about this brain damage please see:
+# http://www.unix.org/version2/whatsnew/lfs20mar.html
+# Additionally, on Linux file systems with 64-bit inodes a file that happens
+# to have a 64-bit inode number cannot be accessed by 32-bit applications on
+# Linux x86/x86_64.  This can occur with file systems such as XFS and NFS.
+AC_DEFUN([AC_SYS_LARGEFILE],
+[AC_ARG_ENABLE(largefile,
+               [  --disable-largefile     omit support for large files])
+AS_IF([test "$enable_largefile" != no],
+ [AC_CACHE_CHECK([for special C compiler options needed for large files],
+    ac_cv_sys_largefile_CC,
+    [ac_cv_sys_largefile_CC=no
+     if test "$GCC" != yes; then
+       ac_save_CC=$CC
+       while :; do
+         # IRIX 6.2 and later do not support large files by default,
+         # so use the C compiler's -n32 option if that helps.
+         AC_LANG_CONFTEST([AC_LANG_PROGRAM([_AC_SYS_LARGEFILE_TEST_INCLUDES])])
+         AC_COMPILE_IFELSE([], [break])
+         CC="$CC -n32"
+         AC_COMPILE_IFELSE([], [ac_cv_sys_largefile_CC=' -n32'; break])
+         break
+       done
+       CC=$ac_save_CC
+       rm -f conftest.$ac_ext
+    fi])
+  if test "$ac_cv_sys_largefile_CC" != no; then
+    CC=$CC$ac_cv_sys_largefile_CC
+  fi
+
+  _AC_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS, 64,
+    ac_cv_sys_file_offset_bits,
+    [Number of bits in a file offset, on hosts where this is settable.],
+    [_AC_SYS_LARGEFILE_TEST_INCLUDES])
+  AS_CASE([$ac_cv_sys_file_offset_bits],
+    [unknown],
+      [_AC_SYS_LARGEFILE_MACRO_VALUE([_LARGE_FILES], [1],
+         [ac_cv_sys_large_files],
+         [Define for large files, on AIX-style hosts.],
+         [_AC_SYS_LARGEFILE_TEST_INCLUDES])],
+    [64],
+      [gl_YEAR2038_BODY([])])])
+])# AC_SYS_LARGEFILE
+
+# Enable large files on systems where this is implemented by Gnulib, not by the
+# system headers.
+# Set the variables WINDOWS_64_BIT_OFF_T, WINDOWS_64_BIT_ST_SIZE if Gnulib
+# overrides ensure that off_t or 'struct size.st_size' are 64-bit, respectively.
+AC_DEFUN([gl_LARGEFILE],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  case "$host_os" in
+    mingw*)
+      dnl Native Windows.
+      dnl mingw64 defines off_t to a 64-bit type already, if
+      dnl _FILE_OFFSET_BITS=64, which is ensured by AC_SYS_LARGEFILE.
+      AC_CACHE_CHECK([for 64-bit off_t], [gl_cv_type_off_t_64],
+        [AC_COMPILE_IFELSE(
+           [AC_LANG_PROGRAM(
+              [[#include <sys/types.h>
+                int verify_off_t_size[sizeof (off_t) >= 8 ? 1 : -1];
+              ]],
+              [[]])],
+           [gl_cv_type_off_t_64=yes], [gl_cv_type_off_t_64=no])
+        ])
+      if test $gl_cv_type_off_t_64 = no; then
+        WINDOWS_64_BIT_OFF_T=1
+      else
+        WINDOWS_64_BIT_OFF_T=0
+      fi
+      dnl Some mingw versions define, if _FILE_OFFSET_BITS=64, 'struct stat'
+      dnl to 'struct _stat32i64' or 'struct _stat64' (depending on
+      dnl _USE_32BIT_TIME_T), which has a 32-bit st_size member.
+      AC_CACHE_CHECK([for 64-bit st_size], [gl_cv_member_st_size_64],
+        [AC_COMPILE_IFELSE(
+           [AC_LANG_PROGRAM(
+              [[#include <sys/types.h>
+                struct stat buf;
+                int verify_st_size_size[sizeof (buf.st_size) >= 8 ? 1 : -1];
+              ]],
+              [[]])],
+           [gl_cv_member_st_size_64=yes], [gl_cv_member_st_size_64=no])
+        ])
+      if test $gl_cv_member_st_size_64 = no; then
+        WINDOWS_64_BIT_ST_SIZE=1
+      else
+        WINDOWS_64_BIT_ST_SIZE=0
+      fi
+      ;;
+    *)
+      dnl Nothing to do on gnulib's side.
+      dnl A 64-bit off_t is
+      dnl   - already the default on Mac OS X, FreeBSD, NetBSD, OpenBSD, IRIX,
+      dnl     OSF/1, Cygwin,
+      dnl   - enabled by _FILE_OFFSET_BITS=64 (ensured by AC_SYS_LARGEFILE) on
+      dnl     glibc, HP-UX, Solaris,
+      dnl   - enabled by _LARGE_FILES=1 (ensured by AC_SYS_LARGEFILE) on AIX,
+      dnl   - impossible to achieve on Minix 3.1.8.
+      WINDOWS_64_BIT_OFF_T=0
+      WINDOWS_64_BIT_ST_SIZE=0
+      ;;
+  esac
+])
diff --git a/src/grep/m4/lcmessage.m4 b/src/grep/m4/lcmessage.m4
new file mode 100644
index 0000000..a52700e
--- /dev/null
+++ b/src/grep/m4/lcmessage.m4
@@ -0,0 +1,35 @@
+# lcmessage.m4 serial 8
+dnl Copyright (C) 1995-2002, 2004-2005, 2008-2014, 2016, 2019-2021 Free
+dnl Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+dnl
+dnl This file can be used in projects which are not available under
+dnl the GNU General Public License or the GNU Lesser General Public
+dnl License but which still want to provide support for the GNU gettext
+dnl functionality.
+dnl Please note that the actual code of the GNU gettext library is covered
+dnl by the GNU Lesser General Public License, and the rest of the GNU
+dnl gettext package is covered by the GNU General Public License.
+dnl They are *not* in the public domain.
+
+dnl Authors:
+dnl   Ulrich Drepper <drepper@cygnus.com>, 1995.
+
+# Check whether LC_MESSAGES is available in <locale.h>.
+
+AC_DEFUN([gt_LC_MESSAGES],
+[
+  AC_CACHE_CHECK([for LC_MESSAGES], [gt_cv_val_LC_MESSAGES],
+    [AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <locale.h>]],
+          [[return LC_MESSAGES]])],
+       [gt_cv_val_LC_MESSAGES=yes],
+       [gt_cv_val_LC_MESSAGES=no])])
+  if test $gt_cv_val_LC_MESSAGES = yes; then
+    AC_DEFINE([HAVE_LC_MESSAGES], [1],
+      [Define if your <locale.h> file defines LC_MESSAGES.])
+  fi
+])
diff --git a/src/grep/m4/lib-ld.m4 b/src/grep/m4/lib-ld.m4
new file mode 100644
index 0000000..076358d
--- /dev/null
+++ b/src/grep/m4/lib-ld.m4
@@ -0,0 +1,168 @@
+# lib-ld.m4 serial 10
+dnl Copyright (C) 1996-2003, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Subroutines of libtool.m4,
+dnl with replacements s/_*LT_PATH/AC_LIB_PROG/ and s/lt_/acl_/ to avoid
+dnl collision with libtool.m4.
+
+dnl From libtool-2.4. Sets the variable with_gnu_ld to yes or no.
+AC_DEFUN([AC_LIB_PROG_LD_GNU],
+[AC_CACHE_CHECK([if the linker ($LD) is GNU ld], [acl_cv_prog_gnu_ld],
+[# I'd rather use --version here, but apparently some GNU lds only accept -v.
+case `$LD -v 2>&1 </dev/null` in
+*GNU* | *'with BFD'*)
+  acl_cv_prog_gnu_ld=yes
+  ;;
+*)
+  acl_cv_prog_gnu_ld=no
+  ;;
+esac])
+with_gnu_ld=$acl_cv_prog_gnu_ld
+])
+
+dnl From libtool-2.4. Sets the variable LD.
+AC_DEFUN([AC_LIB_PROG_LD],
+[AC_REQUIRE([AC_PROG_CC])dnl
+AC_REQUIRE([AC_CANONICAL_HOST])dnl
+
+AC_ARG_WITH([gnu-ld],
+    [AS_HELP_STRING([--with-gnu-ld],
+        [assume the C compiler uses GNU ld [default=no]])],
+    [test "$withval" = no || with_gnu_ld=yes],
+    [with_gnu_ld=no])dnl
+
+# Prepare PATH_SEPARATOR.
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+  # Determine PATH_SEPARATOR by trying to find /bin/sh in a PATH which
+  # contains only /bin. Note that ksh looks also at the FPATH variable,
+  # so we have to set that as well for the test.
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+    && { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+           || PATH_SEPARATOR=';'
+       }
+fi
+
+if test -n "$LD"; then
+  AC_MSG_CHECKING([for ld])
+elif test "$GCC" = yes; then
+  AC_MSG_CHECKING([for ld used by $CC])
+elif test "$with_gnu_ld" = yes; then
+  AC_MSG_CHECKING([for GNU ld])
+else
+  AC_MSG_CHECKING([for non-GNU ld])
+fi
+if test -n "$LD"; then
+  # Let the user override the test with a path.
+  :
+else
+  AC_CACHE_VAL([acl_cv_path_LD],
+  [
+    acl_cv_path_LD= # Final result of this test
+    ac_prog=ld # Program to search in $PATH
+    if test "$GCC" = yes; then
+      # Check if gcc -print-prog-name=ld gives a path.
+      case $host in
+        *-*-mingw*)
+          # gcc leaves a trailing carriage return which upsets mingw
+          acl_output=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
+        *)
+          acl_output=`($CC -print-prog-name=ld) 2>&5` ;;
+      esac
+      case $acl_output in
+        # Accept absolute paths.
+        [[\\/]]* | ?:[[\\/]]*)
+          re_direlt='/[[^/]][[^/]]*/\.\./'
+          # Canonicalize the pathname of ld
+          acl_output=`echo "$acl_output" | sed 's%\\\\%/%g'`
+          while echo "$acl_output" | grep "$re_direlt" > /dev/null 2>&1; do
+            acl_output=`echo $acl_output | sed "s%$re_direlt%/%"`
+          done
+          # Got the pathname. No search in PATH is needed.
+          acl_cv_path_LD="$acl_output"
+          ac_prog=
+          ;;
+        "")
+          # If it fails, then pretend we aren't using GCC.
+          ;;
+        *)
+          # If it is relative, then search for the first ld in PATH.
+          with_gnu_ld=unknown
+          ;;
+      esac
+    fi
+    if test -n "$ac_prog"; then
+      # Search for $ac_prog in $PATH.
+      acl_save_ifs="$IFS"; IFS=$PATH_SEPARATOR
+      for ac_dir in $PATH; do
+        IFS="$acl_save_ifs"
+        test -z "$ac_dir" && ac_dir=.
+        if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
+          acl_cv_path_LD="$ac_dir/$ac_prog"
+          # Check to see if the program is GNU ld.  I'd rather use --version,
+          # but apparently some variants of GNU ld only accept -v.
+          # Break only if it was the GNU/non-GNU ld that we prefer.
+          case `"$acl_cv_path_LD" -v 2>&1 </dev/null` in
+            *GNU* | *'with BFD'*)
+              test "$with_gnu_ld" != no && break
+              ;;
+            *)
+              test "$with_gnu_ld" != yes && break
+              ;;
+          esac
+        fi
+      done
+      IFS="$acl_save_ifs"
+    fi
+    case $host in
+      *-*-aix*)
+        AC_COMPILE_IFELSE(
+          [AC_LANG_SOURCE(
+             [[#if defined __powerpc64__ || defined __LP64__
+                int ok;
+               #else
+                error fail
+               #endif
+             ]])],
+          [# The compiler produces 64-bit code. Add option '-b64' so that the
+           # linker groks 64-bit object files.
+           case "$acl_cv_path_LD " in
+             *" -b64 "*) ;;
+             *) acl_cv_path_LD="$acl_cv_path_LD -b64" ;;
+           esac
+          ], [])
+        ;;
+      sparc64-*-netbsd*)
+        AC_COMPILE_IFELSE(
+          [AC_LANG_SOURCE(
+             [[#if defined __sparcv9 || defined __arch64__
+                int ok;
+               #else
+                error fail
+               #endif
+             ]])],
+          [],
+          [# The compiler produces 32-bit code. Add option '-m elf32_sparc'
+           # so that the linker groks 32-bit object files.
+           case "$acl_cv_path_LD " in
+             *" -m elf32_sparc "*) ;;
+             *) acl_cv_path_LD="$acl_cv_path_LD -m elf32_sparc" ;;
+           esac
+          ])
+        ;;
+    esac
+  ])
+  LD="$acl_cv_path_LD"
+fi
+if test -n "$LD"; then
+  AC_MSG_RESULT([$LD])
+else
+  AC_MSG_RESULT([no])
+  AC_MSG_ERROR([no acceptable ld found in \$PATH])
+fi
+AC_LIB_PROG_LD_GNU
+])
diff --git a/src/grep/m4/lib-link.m4 b/src/grep/m4/lib-link.m4
new file mode 100644
index 0000000..787efab
--- /dev/null
+++ b/src/grep/m4/lib-link.m4
@@ -0,0 +1,813 @@
+# lib-link.m4 serial 32
+dnl Copyright (C) 2001-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+
+AC_PREREQ([2.61])
+
+dnl AC_LIB_LINKFLAGS(name [, dependencies]) searches for libname and
+dnl the libraries corresponding to explicit and implicit dependencies.
+dnl Sets and AC_SUBSTs the LIB${NAME} and LTLIB${NAME} variables and
+dnl augments the CPPFLAGS variable.
+dnl Sets and AC_SUBSTs the LIB${NAME}_PREFIX variable to nonempty if libname
+dnl was found in ${LIB${NAME}_PREFIX}/$acl_libdirstem.
+AC_DEFUN([AC_LIB_LINKFLAGS],
+[
+  AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
+  AC_REQUIRE([AC_LIB_RPATH])
+  pushdef([Name],[m4_translit([$1],[./+-], [____])])
+  pushdef([NAME],[m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./+-],
+                                   [ABCDEFGHIJKLMNOPQRSTUVWXYZ____])])
+  AC_CACHE_CHECK([how to link with lib[]$1], [ac_cv_lib[]Name[]_libs], [
+    AC_LIB_LINKFLAGS_BODY([$1], [$2])
+    ac_cv_lib[]Name[]_libs="$LIB[]NAME"
+    ac_cv_lib[]Name[]_ltlibs="$LTLIB[]NAME"
+    ac_cv_lib[]Name[]_cppflags="$INC[]NAME"
+    ac_cv_lib[]Name[]_prefix="$LIB[]NAME[]_PREFIX"
+  ])
+  LIB[]NAME="$ac_cv_lib[]Name[]_libs"
+  LTLIB[]NAME="$ac_cv_lib[]Name[]_ltlibs"
+  INC[]NAME="$ac_cv_lib[]Name[]_cppflags"
+  LIB[]NAME[]_PREFIX="$ac_cv_lib[]Name[]_prefix"
+  AC_LIB_APPENDTOVAR([CPPFLAGS], [$INC]NAME)
+  AC_SUBST([LIB]NAME)
+  AC_SUBST([LTLIB]NAME)
+  AC_SUBST([LIB]NAME[_PREFIX])
+  dnl Also set HAVE_LIB[]NAME so that AC_LIB_HAVE_LINKFLAGS can reuse the
+  dnl results of this search when this library appears as a dependency.
+  HAVE_LIB[]NAME=yes
+  popdef([NAME])
+  popdef([Name])
+])
+
+dnl AC_LIB_HAVE_LINKFLAGS(name, dependencies, includes, testcode, [missing-message])
+dnl searches for libname and the libraries corresponding to explicit and
+dnl implicit dependencies, together with the specified include files and
+dnl the ability to compile and link the specified testcode. The missing-message
+dnl defaults to 'no' and may contain additional hints for the user.
+dnl If found, it sets and AC_SUBSTs HAVE_LIB${NAME}=yes and the LIB${NAME}
+dnl and LTLIB${NAME} variables and augments the CPPFLAGS variable, and
+dnl #defines HAVE_LIB${NAME} to 1. Otherwise, it sets and AC_SUBSTs
+dnl HAVE_LIB${NAME}=no and LIB${NAME} and LTLIB${NAME} to empty.
+dnl Sets and AC_SUBSTs the LIB${NAME}_PREFIX variable to nonempty if libname
+dnl was found in ${LIB${NAME}_PREFIX}/$acl_libdirstem.
+AC_DEFUN([AC_LIB_HAVE_LINKFLAGS],
+[
+  AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
+  AC_REQUIRE([AC_LIB_RPATH])
+  pushdef([Name],[m4_translit([$1],[./+-], [____])])
+  pushdef([NAME],[m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./+-],
+                                   [ABCDEFGHIJKLMNOPQRSTUVWXYZ____])])
+
+  dnl Search for lib[]Name and define LIB[]NAME, LTLIB[]NAME and INC[]NAME
+  dnl accordingly.
+  AC_LIB_LINKFLAGS_BODY([$1], [$2])
+
+  dnl Add $INC[]NAME to CPPFLAGS before performing the following checks,
+  dnl because if the user has installed lib[]Name and not disabled its use
+  dnl via --without-lib[]Name-prefix, he wants to use it.
+  ac_save_CPPFLAGS="$CPPFLAGS"
+  AC_LIB_APPENDTOVAR([CPPFLAGS], [$INC]NAME)
+
+  AC_CACHE_CHECK([for lib[]$1], [ac_cv_lib[]Name], [
+    ac_save_LIBS="$LIBS"
+    dnl If $LIB[]NAME contains some -l options, add it to the end of LIBS,
+    dnl because these -l options might require -L options that are present in
+    dnl LIBS. -l options benefit only from the -L options listed before it.
+    dnl Otherwise, add it to the front of LIBS, because it may be a static
+    dnl library that depends on another static library that is present in LIBS.
+    dnl Static libraries benefit only from the static libraries listed after
+    dnl it.
+    case " $LIB[]NAME" in
+      *" -l"*) LIBS="$LIBS $LIB[]NAME" ;;
+      *)       LIBS="$LIB[]NAME $LIBS" ;;
+    esac
+    AC_LINK_IFELSE(
+      [AC_LANG_PROGRAM([[$3]], [[$4]])],
+      [ac_cv_lib[]Name=yes],
+      [ac_cv_lib[]Name='m4_if([$5], [], [no], [[$5]])'])
+    LIBS="$ac_save_LIBS"
+  ])
+  if test "$ac_cv_lib[]Name" = yes; then
+    HAVE_LIB[]NAME=yes
+    AC_DEFINE([HAVE_LIB]NAME, 1, [Define if you have the lib][$1 library.])
+    AC_MSG_CHECKING([how to link with lib[]$1])
+    AC_MSG_RESULT([$LIB[]NAME])
+  else
+    HAVE_LIB[]NAME=no
+    dnl If $LIB[]NAME didn't lead to a usable library, we don't need
+    dnl $INC[]NAME either.
+    CPPFLAGS="$ac_save_CPPFLAGS"
+    LIB[]NAME=
+    LTLIB[]NAME=
+    LIB[]NAME[]_PREFIX=
+  fi
+  AC_SUBST([HAVE_LIB]NAME)
+  AC_SUBST([LIB]NAME)
+  AC_SUBST([LTLIB]NAME)
+  AC_SUBST([LIB]NAME[_PREFIX])
+  popdef([NAME])
+  popdef([Name])
+])
+
+dnl Determine the platform dependent parameters needed to use rpath:
+dnl   acl_libext,
+dnl   acl_shlibext,
+dnl   acl_libname_spec,
+dnl   acl_library_names_spec,
+dnl   acl_hardcode_libdir_flag_spec,
+dnl   acl_hardcode_libdir_separator,
+dnl   acl_hardcode_direct,
+dnl   acl_hardcode_minus_L.
+AC_DEFUN([AC_LIB_RPATH],
+[
+  dnl Complain if config.rpath is missing.
+  AC_REQUIRE_AUX_FILE([config.rpath])
+  AC_REQUIRE([AC_PROG_CC])                dnl we use $CC, $GCC, $LDFLAGS
+  AC_REQUIRE([AC_LIB_PROG_LD])            dnl we use $LD, $with_gnu_ld
+  AC_REQUIRE([AC_CANONICAL_HOST])         dnl we use $host
+  AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT]) dnl we use $ac_aux_dir
+  AC_CACHE_CHECK([for shared library run path origin], [acl_cv_rpath], [
+    CC="$CC" GCC="$GCC" LDFLAGS="$LDFLAGS" LD="$LD" with_gnu_ld="$with_gnu_ld" \
+    ${CONFIG_SHELL-/bin/sh} "$ac_aux_dir/config.rpath" "$host" > conftest.sh
+    . ./conftest.sh
+    rm -f ./conftest.sh
+    acl_cv_rpath=done
+  ])
+  wl="$acl_cv_wl"
+  acl_libext="$acl_cv_libext"
+  acl_shlibext="$acl_cv_shlibext"
+  acl_libname_spec="$acl_cv_libname_spec"
+  acl_library_names_spec="$acl_cv_library_names_spec"
+  acl_hardcode_libdir_flag_spec="$acl_cv_hardcode_libdir_flag_spec"
+  acl_hardcode_libdir_separator="$acl_cv_hardcode_libdir_separator"
+  acl_hardcode_direct="$acl_cv_hardcode_direct"
+  acl_hardcode_minus_L="$acl_cv_hardcode_minus_L"
+  dnl Determine whether the user wants rpath handling at all.
+  AC_ARG_ENABLE([rpath],
+    [  --disable-rpath         do not hardcode runtime library paths],
+    :, enable_rpath=yes)
+])
+
+dnl AC_LIB_FROMPACKAGE(name, package)
+dnl declares that libname comes from the given package. The configure file
+dnl will then not have a --with-libname-prefix option but a
+dnl --with-package-prefix option. Several libraries can come from the same
+dnl package. This declaration must occur before an AC_LIB_LINKFLAGS or similar
+dnl macro call that searches for libname.
+AC_DEFUN([AC_LIB_FROMPACKAGE],
+[
+  pushdef([NAME],[m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./+-],
+                                   [ABCDEFGHIJKLMNOPQRSTUVWXYZ____])])
+  define([acl_frompackage_]NAME, [$2])
+  popdef([NAME])
+  pushdef([PACK],[$2])
+  pushdef([PACKUP],[m4_translit(PACK,[abcdefghijklmnopqrstuvwxyz./+-],
+                                     [ABCDEFGHIJKLMNOPQRSTUVWXYZ____])])
+  define([acl_libsinpackage_]PACKUP,
+    m4_ifdef([acl_libsinpackage_]PACKUP, [m4_defn([acl_libsinpackage_]PACKUP)[, ]],)[lib$1])
+  popdef([PACKUP])
+  popdef([PACK])
+])
+
+dnl AC_LIB_LINKFLAGS_BODY(name [, dependencies]) searches for libname and
+dnl the libraries corresponding to explicit and implicit dependencies.
+dnl Sets the LIB${NAME}, LTLIB${NAME} and INC${NAME} variables.
+dnl Also, sets the LIB${NAME}_PREFIX variable to nonempty if libname was found
+dnl in ${LIB${NAME}_PREFIX}/$acl_libdirstem.
+AC_DEFUN([AC_LIB_LINKFLAGS_BODY],
+[
+  AC_REQUIRE([AC_LIB_PREPARE_MULTILIB])
+  pushdef([NAME],[m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./+-],
+                                   [ABCDEFGHIJKLMNOPQRSTUVWXYZ____])])
+  pushdef([PACK],[m4_ifdef([acl_frompackage_]NAME, [acl_frompackage_]NAME, lib[$1])])
+  pushdef([PACKUP],[m4_translit(PACK,[abcdefghijklmnopqrstuvwxyz./+-],
+                                     [ABCDEFGHIJKLMNOPQRSTUVWXYZ____])])
+  pushdef([PACKLIBS],[m4_ifdef([acl_frompackage_]NAME, [acl_libsinpackage_]PACKUP, lib[$1])])
+  dnl By default, look in $includedir and $libdir.
+  use_additional=yes
+  AC_LIB_WITH_FINAL_PREFIX([
+    eval additional_includedir=\"$includedir\"
+    eval additional_libdir=\"$libdir\"
+    eval additional_libdir2=\"$exec_prefix/$acl_libdirstem2\"
+    eval additional_libdir3=\"$exec_prefix/$acl_libdirstem3\"
+  ])
+  AC_ARG_WITH(PACK[-prefix],
+[[  --with-]]PACK[[-prefix[=DIR]  search for ]PACKLIBS[ in DIR/include and DIR/lib
+  --without-]]PACK[[-prefix     don't search for ]PACKLIBS[ in includedir and libdir]],
+[
+    if test "X$withval" = "Xno"; then
+      use_additional=no
+    else
+      if test "X$withval" = "X"; then
+        AC_LIB_WITH_FINAL_PREFIX([
+          eval additional_includedir=\"$includedir\"
+          eval additional_libdir=\"$libdir\"
+          eval additional_libdir2=\"$exec_prefix/$acl_libdirstem2\"
+          eval additional_libdir3=\"$exec_prefix/$acl_libdirstem3\"
+        ])
+      else
+        additional_includedir="$withval/include"
+        additional_libdir="$withval/$acl_libdirstem"
+        additional_libdir2="$withval/$acl_libdirstem2"
+        additional_libdir3="$withval/$acl_libdirstem3"
+      fi
+    fi
+])
+  if test "X$additional_libdir2" = "X$additional_libdir"; then
+    additional_libdir2=
+  fi
+  if test "X$additional_libdir3" = "X$additional_libdir"; then
+    additional_libdir3=
+  fi
+  dnl Search the library and its dependencies in $additional_libdir and
+  dnl $LDFLAGS. Using breadth-first-seach.
+  LIB[]NAME=
+  LTLIB[]NAME=
+  INC[]NAME=
+  LIB[]NAME[]_PREFIX=
+  dnl HAVE_LIB${NAME} is an indicator that LIB${NAME}, LTLIB${NAME} have been
+  dnl computed. So it has to be reset here.
+  HAVE_LIB[]NAME=
+  rpathdirs=
+  ltrpathdirs=
+  names_already_handled=
+  names_next_round='$1 $2'
+  while test -n "$names_next_round"; do
+    names_this_round="$names_next_round"
+    names_next_round=
+    for name in $names_this_round; do
+      already_handled=
+      for n in $names_already_handled; do
+        if test "$n" = "$name"; then
+          already_handled=yes
+          break
+        fi
+      done
+      if test -z "$already_handled"; then
+        names_already_handled="$names_already_handled $name"
+        dnl See if it was already located by an earlier AC_LIB_LINKFLAGS
+        dnl or AC_LIB_HAVE_LINKFLAGS call.
+        uppername=`echo "$name" | sed -e 'y|abcdefghijklmnopqrstuvwxyz./+-|ABCDEFGHIJKLMNOPQRSTUVWXYZ____|'`
+        eval value=\"\$HAVE_LIB$uppername\"
+        if test -n "$value"; then
+          if test "$value" = yes; then
+            eval value=\"\$LIB$uppername\"
+            test -z "$value" || LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$value"
+            eval value=\"\$LTLIB$uppername\"
+            test -z "$value" || LTLIB[]NAME="${LTLIB[]NAME}${LTLIB[]NAME:+ }$value"
+          else
+            dnl An earlier call to AC_LIB_HAVE_LINKFLAGS has determined
+            dnl that this library doesn't exist. So just drop it.
+            :
+          fi
+        else
+          dnl Search the library lib$name in $additional_libdir and $LDFLAGS
+          dnl and the already constructed $LIBNAME/$LTLIBNAME.
+          found_dir=
+          found_la=
+          found_so=
+          found_a=
+          eval libname=\"$acl_libname_spec\"    # typically: libname=lib$name
+          if test -n "$acl_shlibext"; then
+            shrext=".$acl_shlibext"             # typically: shrext=.so
+          else
+            shrext=
+          fi
+          if test $use_additional = yes; then
+            for additional_libdir_variable in additional_libdir additional_libdir2 additional_libdir3; do
+              if test "X$found_dir" = "X"; then
+                eval dir=\$$additional_libdir_variable
+                if test -n "$dir"; then
+                  dnl The same code as in the loop below:
+                  dnl First look for a shared library.
+                  if test -n "$acl_shlibext"; then
+                    if test -f "$dir/$libname$shrext" && acl_is_expected_elfclass < "$dir/$libname$shrext"; then
+                      found_dir="$dir"
+                      found_so="$dir/$libname$shrext"
+                    else
+                      if test "$acl_library_names_spec" = '$libname$shrext$versuffix'; then
+                        ver=`(cd "$dir" && \
+                              for f in "$libname$shrext".*; do echo "$f"; done \
+                              | sed -e "s,^$libname$shrext\\\\.,," \
+                              | sort -t '.' -n -r -k1,1 -k2,2 -k3,3 -k4,4 -k5,5 \
+                              | sed 1q ) 2>/dev/null`
+                        if test -n "$ver" && test -f "$dir/$libname$shrext.$ver" && acl_is_expected_elfclass < "$dir/$libname$shrext.$ver"; then
+                          found_dir="$dir"
+                          found_so="$dir/$libname$shrext.$ver"
+                        fi
+                      else
+                        eval library_names=\"$acl_library_names_spec\"
+                        for f in $library_names; do
+                          if test -f "$dir/$f" && acl_is_expected_elfclass < "$dir/$f"; then
+                            found_dir="$dir"
+                            found_so="$dir/$f"
+                            break
+                          fi
+                        done
+                      fi
+                    fi
+                  fi
+                  dnl Then look for a static library.
+                  if test "X$found_dir" = "X"; then
+                    if test -f "$dir/$libname.$acl_libext" && ${AR-ar} -p "$dir/$libname.$acl_libext" | acl_is_expected_elfclass; then
+                      found_dir="$dir"
+                      found_a="$dir/$libname.$acl_libext"
+                    fi
+                  fi
+                  if test "X$found_dir" != "X"; then
+                    if test -f "$dir/$libname.la"; then
+                      found_la="$dir/$libname.la"
+                    fi
+                  fi
+                fi
+              fi
+            done
+          fi
+          if test "X$found_dir" = "X"; then
+            for x in $LDFLAGS $LTLIB[]NAME; do
+              AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
+              case "$x" in
+                -L*)
+                  dir=`echo "X$x" | sed -e 's/^X-L//'`
+                  dnl First look for a shared library.
+                  if test -n "$acl_shlibext"; then
+                    if test -f "$dir/$libname$shrext" && acl_is_expected_elfclass < "$dir/$libname$shrext"; then
+                      found_dir="$dir"
+                      found_so="$dir/$libname$shrext"
+                    else
+                      if test "$acl_library_names_spec" = '$libname$shrext$versuffix'; then
+                        ver=`(cd "$dir" && \
+                              for f in "$libname$shrext".*; do echo "$f"; done \
+                              | sed -e "s,^$libname$shrext\\\\.,," \
+                              | sort -t '.' -n -r -k1,1 -k2,2 -k3,3 -k4,4 -k5,5 \
+                              | sed 1q ) 2>/dev/null`
+                        if test -n "$ver" && test -f "$dir/$libname$shrext.$ver" && acl_is_expected_elfclass < "$dir/$libname$shrext.$ver"; then
+                          found_dir="$dir"
+                          found_so="$dir/$libname$shrext.$ver"
+                        fi
+                      else
+                        eval library_names=\"$acl_library_names_spec\"
+                        for f in $library_names; do
+                          if test -f "$dir/$f" && acl_is_expected_elfclass < "$dir/$f"; then
+                            found_dir="$dir"
+                            found_so="$dir/$f"
+                            break
+                          fi
+                        done
+                      fi
+                    fi
+                  fi
+                  dnl Then look for a static library.
+                  if test "X$found_dir" = "X"; then
+                    if test -f "$dir/$libname.$acl_libext" && ${AR-ar} -p "$dir/$libname.$acl_libext" | acl_is_expected_elfclass; then
+                      found_dir="$dir"
+                      found_a="$dir/$libname.$acl_libext"
+                    fi
+                  fi
+                  if test "X$found_dir" != "X"; then
+                    if test -f "$dir/$libname.la"; then
+                      found_la="$dir/$libname.la"
+                    fi
+                  fi
+                  ;;
+              esac
+              if test "X$found_dir" != "X"; then
+                break
+              fi
+            done
+          fi
+          if test "X$found_dir" != "X"; then
+            dnl Found the library.
+            LTLIB[]NAME="${LTLIB[]NAME}${LTLIB[]NAME:+ }-L$found_dir -l$name"
+            if test "X$found_so" != "X"; then
+              dnl Linking with a shared library. We attempt to hardcode its
+              dnl directory into the executable's runpath, unless it's the
+              dnl standard /usr/lib.
+              if test "$enable_rpath" = no \
+                 || test "X$found_dir" = "X/usr/$acl_libdirstem" \
+                 || test "X$found_dir" = "X/usr/$acl_libdirstem2" \
+                 || test "X$found_dir" = "X/usr/$acl_libdirstem3"; then
+                dnl No hardcoding is needed.
+                LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$found_so"
+              else
+                dnl Use an explicit option to hardcode DIR into the resulting
+                dnl binary.
+                dnl Potentially add DIR to ltrpathdirs.
+                dnl The ltrpathdirs will be appended to $LTLIBNAME at the end.
+                haveit=
+                for x in $ltrpathdirs; do
+                  if test "X$x" = "X$found_dir"; then
+                    haveit=yes
+                    break
+                  fi
+                done
+                if test -z "$haveit"; then
+                  ltrpathdirs="$ltrpathdirs $found_dir"
+                fi
+                dnl The hardcoding into $LIBNAME is system dependent.
+                if test "$acl_hardcode_direct" = yes; then
+                  dnl Using DIR/libNAME.so during linking hardcodes DIR into the
+                  dnl resulting binary.
+                  LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$found_so"
+                else
+                  if test -n "$acl_hardcode_libdir_flag_spec" && test "$acl_hardcode_minus_L" = no; then
+                    dnl Use an explicit option to hardcode DIR into the resulting
+                    dnl binary.
+                    LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$found_so"
+                    dnl Potentially add DIR to rpathdirs.
+                    dnl The rpathdirs will be appended to $LIBNAME at the end.
+                    haveit=
+                    for x in $rpathdirs; do
+                      if test "X$x" = "X$found_dir"; then
+                        haveit=yes
+                        break
+                      fi
+                    done
+                    if test -z "$haveit"; then
+                      rpathdirs="$rpathdirs $found_dir"
+                    fi
+                  else
+                    dnl Rely on "-L$found_dir".
+                    dnl But don't add it if it's already contained in the LDFLAGS
+                    dnl or the already constructed $LIBNAME
+                    haveit=
+                    for x in $LDFLAGS $LIB[]NAME; do
+                      AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
+                      if test "X$x" = "X-L$found_dir"; then
+                        haveit=yes
+                        break
+                      fi
+                    done
+                    if test -z "$haveit"; then
+                      LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }-L$found_dir"
+                    fi
+                    if test "$acl_hardcode_minus_L" != no; then
+                      dnl FIXME: Not sure whether we should use
+                      dnl "-L$found_dir -l$name" or "-L$found_dir $found_so"
+                      dnl here.
+                      LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$found_so"
+                    else
+                      dnl We cannot use $acl_hardcode_runpath_var and LD_RUN_PATH
+                      dnl here, because this doesn't fit in flags passed to the
+                      dnl compiler. So give up. No hardcoding. This affects only
+                      dnl very old systems.
+                      dnl FIXME: Not sure whether we should use
+                      dnl "-L$found_dir -l$name" or "-L$found_dir $found_so"
+                      dnl here.
+                      LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }-l$name"
+                    fi
+                  fi
+                fi
+              fi
+            else
+              if test "X$found_a" != "X"; then
+                dnl Linking with a static library.
+                LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$found_a"
+              else
+                dnl We shouldn't come here, but anyway it's good to have a
+                dnl fallback.
+                LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }-L$found_dir -l$name"
+              fi
+            fi
+            dnl Assume the include files are nearby.
+            additional_includedir=
+            case "$found_dir" in
+              */$acl_libdirstem | */$acl_libdirstem/)
+                basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem/"'*$,,'`
+                if test "$name" = '$1'; then
+                  LIB[]NAME[]_PREFIX="$basedir"
+                fi
+                additional_includedir="$basedir/include"
+                ;;
+              */$acl_libdirstem2 | */$acl_libdirstem2/)
+                basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem2/"'*$,,'`
+                if test "$name" = '$1'; then
+                  LIB[]NAME[]_PREFIX="$basedir"
+                fi
+                additional_includedir="$basedir/include"
+                ;;
+              */$acl_libdirstem3 | */$acl_libdirstem3/)
+                basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem3/"'*$,,'`
+                if test "$name" = '$1'; then
+                  LIB[]NAME[]_PREFIX="$basedir"
+                fi
+                additional_includedir="$basedir/include"
+                ;;
+            esac
+            if test "X$additional_includedir" != "X"; then
+              dnl Potentially add $additional_includedir to $INCNAME.
+              dnl But don't add it
+              dnl   1. if it's the standard /usr/include,
+              dnl   2. if it's /usr/local/include and we are using GCC on Linux,
+              dnl   3. if it's already present in $CPPFLAGS or the already
+              dnl      constructed $INCNAME,
+              dnl   4. if it doesn't exist as a directory.
+              if test "X$additional_includedir" != "X/usr/include"; then
+                haveit=
+                if test "X$additional_includedir" = "X/usr/local/include"; then
+                  if test -n "$GCC"; then
+                    case $host_os in
+                      linux* | gnu* | k*bsd*-gnu) haveit=yes;;
+                    esac
+                  fi
+                fi
+                if test -z "$haveit"; then
+                  for x in $CPPFLAGS $INC[]NAME; do
+                    AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
+                    if test "X$x" = "X-I$additional_includedir"; then
+                      haveit=yes
+                      break
+                    fi
+                  done
+                  if test -z "$haveit"; then
+                    if test -d "$additional_includedir"; then
+                      dnl Really add $additional_includedir to $INCNAME.
+                      INC[]NAME="${INC[]NAME}${INC[]NAME:+ }-I$additional_includedir"
+                    fi
+                  fi
+                fi
+              fi
+            fi
+            dnl Look for dependencies.
+            if test -n "$found_la"; then
+              dnl Read the .la file. It defines the variables
+              dnl dlname, library_names, old_library, dependency_libs, current,
+              dnl age, revision, installed, dlopen, dlpreopen, libdir.
+              save_libdir="$libdir"
+              case "$found_la" in
+                */* | *\\*) . "$found_la" ;;
+                *) . "./$found_la" ;;
+              esac
+              libdir="$save_libdir"
+              dnl We use only dependency_libs.
+              for dep in $dependency_libs; do
+                case "$dep" in
+                  -L*)
+                    dependency_libdir=`echo "X$dep" | sed -e 's/^X-L//'`
+                    dnl Potentially add $dependency_libdir to $LIBNAME and $LTLIBNAME.
+                    dnl But don't add it
+                    dnl   1. if it's the standard /usr/lib,
+                    dnl   2. if it's /usr/local/lib and we are using GCC on Linux,
+                    dnl   3. if it's already present in $LDFLAGS or the already
+                    dnl      constructed $LIBNAME,
+                    dnl   4. if it doesn't exist as a directory.
+                    if test "X$dependency_libdir" != "X/usr/$acl_libdirstem" \
+                       && test "X$dependency_libdir" != "X/usr/$acl_libdirstem2" \
+                       && test "X$dependency_libdir" != "X/usr/$acl_libdirstem3"; then
+                      haveit=
+                      if test "X$dependency_libdir" = "X/usr/local/$acl_libdirstem" \
+                         || test "X$dependency_libdir" = "X/usr/local/$acl_libdirstem2" \
+                         || test "X$dependency_libdir" = "X/usr/local/$acl_libdirstem3"; then
+                        if test -n "$GCC"; then
+                          case $host_os in
+                            linux* | gnu* | k*bsd*-gnu) haveit=yes;;
+                          esac
+                        fi
+                      fi
+                      if test -z "$haveit"; then
+                        haveit=
+                        for x in $LDFLAGS $LIB[]NAME; do
+                          AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
+                          if test "X$x" = "X-L$dependency_libdir"; then
+                            haveit=yes
+                            break
+                          fi
+                        done
+                        if test -z "$haveit"; then
+                          if test -d "$dependency_libdir"; then
+                            dnl Really add $dependency_libdir to $LIBNAME.
+                            LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }-L$dependency_libdir"
+                          fi
+                        fi
+                        haveit=
+                        for x in $LDFLAGS $LTLIB[]NAME; do
+                          AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
+                          if test "X$x" = "X-L$dependency_libdir"; then
+                            haveit=yes
+                            break
+                          fi
+                        done
+                        if test -z "$haveit"; then
+                          if test -d "$dependency_libdir"; then
+                            dnl Really add $dependency_libdir to $LTLIBNAME.
+                            LTLIB[]NAME="${LTLIB[]NAME}${LTLIB[]NAME:+ }-L$dependency_libdir"
+                          fi
+                        fi
+                      fi
+                    fi
+                    ;;
+                  -R*)
+                    dir=`echo "X$dep" | sed -e 's/^X-R//'`
+                    if test "$enable_rpath" != no; then
+                      dnl Potentially add DIR to rpathdirs.
+                      dnl The rpathdirs will be appended to $LIBNAME at the end.
+                      haveit=
+                      for x in $rpathdirs; do
+                        if test "X$x" = "X$dir"; then
+                          haveit=yes
+                          break
+                        fi
+                      done
+                      if test -z "$haveit"; then
+                        rpathdirs="$rpathdirs $dir"
+                      fi
+                      dnl Potentially add DIR to ltrpathdirs.
+                      dnl The ltrpathdirs will be appended to $LTLIBNAME at the end.
+                      haveit=
+                      for x in $ltrpathdirs; do
+                        if test "X$x" = "X$dir"; then
+                          haveit=yes
+                          break
+                        fi
+                      done
+                      if test -z "$haveit"; then
+                        ltrpathdirs="$ltrpathdirs $dir"
+                      fi
+                    fi
+                    ;;
+                  -l*)
+                    dnl Handle this in the next round.
+                    dnl But on GNU systems, ignore -lc options, because
+                    dnl   - linking with libc is the default anyway,
+                    dnl   - linking with libc.a may produce an error
+                    dnl     "/usr/bin/ld: dynamic STT_GNU_IFUNC symbol `strcmp' with pointer equality in `/usr/lib/libc.a(strcmp.o)' can not be used when making an executable; recompile with -fPIE and relink with -pie"
+                    dnl     or may produce an executable that always crashes, see
+                    dnl     <https://lists.gnu.org/archive/html/grep-devel/2020-09/msg00052.html>.
+                    dep=`echo "X$dep" | sed -e 's/^X-l//'`
+                    if test "X$dep" != Xc \
+                       || case $host_os in
+                            linux* | gnu* | k*bsd*-gnu) false ;;
+                            *)                          true ;;
+                          esac; then
+                      names_next_round="$names_next_round $dep"
+                    fi
+                    ;;
+                  *.la)
+                    dnl Handle this in the next round. Throw away the .la's
+                    dnl directory; it is already contained in a preceding -L
+                    dnl option.
+                    names_next_round="$names_next_round "`echo "X$dep" | sed -e 's,^X.*/,,' -e 's,^lib,,' -e 's,\.la$,,'`
+                    ;;
+                  *)
+                    dnl Most likely an immediate library name.
+                    LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$dep"
+                    LTLIB[]NAME="${LTLIB[]NAME}${LTLIB[]NAME:+ }$dep"
+                    ;;
+                esac
+              done
+            fi
+          else
+            dnl Didn't find the library; assume it is in the system directories
+            dnl known to the linker and runtime loader. (All the system
+            dnl directories known to the linker should also be known to the
+            dnl runtime loader, otherwise the system is severely misconfigured.)
+            LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }-l$name"
+            LTLIB[]NAME="${LTLIB[]NAME}${LTLIB[]NAME:+ }-l$name"
+          fi
+        fi
+      fi
+    done
+  done
+  if test "X$rpathdirs" != "X"; then
+    if test -n "$acl_hardcode_libdir_separator"; then
+      dnl Weird platform: only the last -rpath option counts, the user must
+      dnl pass all path elements in one option. We can arrange that for a
+      dnl single library, but not when more than one $LIBNAMEs are used.
+      alldirs=
+      for found_dir in $rpathdirs; do
+        alldirs="${alldirs}${alldirs:+$acl_hardcode_libdir_separator}$found_dir"
+      done
+      dnl Note: acl_hardcode_libdir_flag_spec uses $libdir and $wl.
+      acl_save_libdir="$libdir"
+      libdir="$alldirs"
+      eval flag=\"$acl_hardcode_libdir_flag_spec\"
+      libdir="$acl_save_libdir"
+      LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$flag"
+    else
+      dnl The -rpath options are cumulative.
+      for found_dir in $rpathdirs; do
+        acl_save_libdir="$libdir"
+        libdir="$found_dir"
+        eval flag=\"$acl_hardcode_libdir_flag_spec\"
+        libdir="$acl_save_libdir"
+        LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$flag"
+      done
+    fi
+  fi
+  if test "X$ltrpathdirs" != "X"; then
+    dnl When using libtool, the option that works for both libraries and
+    dnl executables is -R. The -R options are cumulative.
+    for found_dir in $ltrpathdirs; do
+      LTLIB[]NAME="${LTLIB[]NAME}${LTLIB[]NAME:+ }-R$found_dir"
+    done
+  fi
+  popdef([PACKLIBS])
+  popdef([PACKUP])
+  popdef([PACK])
+  popdef([NAME])
+])
+
+dnl AC_LIB_APPENDTOVAR(VAR, CONTENTS) appends the elements of CONTENTS to VAR,
+dnl unless already present in VAR.
+dnl Works only for CPPFLAGS, not for LIB* variables because that sometimes
+dnl contains two or three consecutive elements that belong together.
+AC_DEFUN([AC_LIB_APPENDTOVAR],
+[
+  for element in [$2]; do
+    haveit=
+    for x in $[$1]; do
+      AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
+      if test "X$x" = "X$element"; then
+        haveit=yes
+        break
+      fi
+    done
+    if test -z "$haveit"; then
+      [$1]="${[$1]}${[$1]:+ }$element"
+    fi
+  done
+])
+
+dnl For those cases where a variable contains several -L and -l options
+dnl referring to unknown libraries and directories, this macro determines the
+dnl necessary additional linker options for the runtime path.
+dnl AC_LIB_LINKFLAGS_FROM_LIBS([LDADDVAR], [LIBSVALUE], [USE-LIBTOOL])
+dnl sets LDADDVAR to linker options needed together with LIBSVALUE.
+dnl If USE-LIBTOOL evaluates to non-empty, linking with libtool is assumed,
+dnl otherwise linking without libtool is assumed.
+AC_DEFUN([AC_LIB_LINKFLAGS_FROM_LIBS],
+[
+  AC_REQUIRE([AC_LIB_RPATH])
+  AC_REQUIRE([AC_LIB_PREPARE_MULTILIB])
+  $1=
+  if test "$enable_rpath" != no; then
+    if test -n "$acl_hardcode_libdir_flag_spec" && test "$acl_hardcode_minus_L" = no; then
+      dnl Use an explicit option to hardcode directories into the resulting
+      dnl binary.
+      rpathdirs=
+      next=
+      for opt in $2; do
+        if test -n "$next"; then
+          dir="$next"
+          dnl No need to hardcode the standard /usr/lib.
+          if test "X$dir" != "X/usr/$acl_libdirstem" \
+             && test "X$dir" != "X/usr/$acl_libdirstem2" \
+             && test "X$dir" != "X/usr/$acl_libdirstem3"; then
+            rpathdirs="$rpathdirs $dir"
+          fi
+          next=
+        else
+          case $opt in
+            -L) next=yes ;;
+            -L*) dir=`echo "X$opt" | sed -e 's,^X-L,,'`
+                 dnl No need to hardcode the standard /usr/lib.
+                 if test "X$dir" != "X/usr/$acl_libdirstem" \
+                    && test "X$dir" != "X/usr/$acl_libdirstem2" \
+                    && test "X$dir" != "X/usr/$acl_libdirstem3"; then
+                   rpathdirs="$rpathdirs $dir"
+                 fi
+                 next= ;;
+            *) next= ;;
+          esac
+        fi
+      done
+      if test "X$rpathdirs" != "X"; then
+        if test -n ""$3""; then
+          dnl libtool is used for linking. Use -R options.
+          for dir in $rpathdirs; do
+            $1="${$1}${$1:+ }-R$dir"
+          done
+        else
+          dnl The linker is used for linking directly.
+          if test -n "$acl_hardcode_libdir_separator"; then
+            dnl Weird platform: only the last -rpath option counts, the user
+            dnl must pass all path elements in one option.
+            alldirs=
+            for dir in $rpathdirs; do
+              alldirs="${alldirs}${alldirs:+$acl_hardcode_libdir_separator}$dir"
+            done
+            acl_save_libdir="$libdir"
+            libdir="$alldirs"
+            eval flag=\"$acl_hardcode_libdir_flag_spec\"
+            libdir="$acl_save_libdir"
+            $1="$flag"
+          else
+            dnl The -rpath options are cumulative.
+            for dir in $rpathdirs; do
+              acl_save_libdir="$libdir"
+              libdir="$dir"
+              eval flag=\"$acl_hardcode_libdir_flag_spec\"
+              libdir="$acl_save_libdir"
+              $1="${$1}${$1:+ }$flag"
+            done
+          fi
+        fi
+      fi
+    fi
+  fi
+  AC_SUBST([$1])
+])
diff --git a/src/grep/m4/lib-prefix.m4 b/src/grep/m4/lib-prefix.m4
new file mode 100644
index 0000000..3c94db0
--- /dev/null
+++ b/src/grep/m4/lib-prefix.m4
@@ -0,0 +1,323 @@
+# lib-prefix.m4 serial 19
+dnl Copyright (C) 2001-2005, 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+
+dnl AC_LIB_PREFIX adds to the CPPFLAGS and LDFLAGS the flags that are needed
+dnl to access previously installed libraries. The basic assumption is that
+dnl a user will want packages to use other packages he previously installed
+dnl with the same --prefix option.
+dnl This macro is not needed if only AC_LIB_LINKFLAGS is used to locate
+dnl libraries, but is otherwise very convenient.
+AC_DEFUN([AC_LIB_PREFIX],
+[
+  AC_BEFORE([$0], [AC_LIB_LINKFLAGS])
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([AC_LIB_PREPARE_MULTILIB])
+  AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
+  dnl By default, look in $includedir and $libdir.
+  use_additional=yes
+  AC_LIB_WITH_FINAL_PREFIX([
+    eval additional_includedir=\"$includedir\"
+    eval additional_libdir=\"$libdir\"
+  ])
+  AC_ARG_WITH([lib-prefix],
+[[  --with-lib-prefix[=DIR] search for libraries in DIR/include and DIR/lib
+  --without-lib-prefix    don't search for libraries in includedir and libdir]],
+[
+    if test "X$withval" = "Xno"; then
+      use_additional=no
+    else
+      if test "X$withval" = "X"; then
+        AC_LIB_WITH_FINAL_PREFIX([
+          eval additional_includedir=\"$includedir\"
+          eval additional_libdir=\"$libdir\"
+        ])
+      else
+        additional_includedir="$withval/include"
+        additional_libdir="$withval/$acl_libdirstem"
+      fi
+    fi
+])
+  if test $use_additional = yes; then
+    dnl Potentially add $additional_includedir to $CPPFLAGS.
+    dnl But don't add it
+    dnl   1. if it's the standard /usr/include,
+    dnl   2. if it's already present in $CPPFLAGS,
+    dnl   3. if it's /usr/local/include and we are using GCC on Linux,
+    dnl   4. if it doesn't exist as a directory.
+    if test "X$additional_includedir" != "X/usr/include"; then
+      haveit=
+      for x in $CPPFLAGS; do
+        AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
+        if test "X$x" = "X-I$additional_includedir"; then
+          haveit=yes
+          break
+        fi
+      done
+      if test -z "$haveit"; then
+        if test "X$additional_includedir" = "X/usr/local/include"; then
+          if test -n "$GCC"; then
+            case $host_os in
+              linux* | gnu* | k*bsd*-gnu) haveit=yes;;
+            esac
+          fi
+        fi
+        if test -z "$haveit"; then
+          if test -d "$additional_includedir"; then
+            dnl Really add $additional_includedir to $CPPFLAGS.
+            CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }-I$additional_includedir"
+          fi
+        fi
+      fi
+    fi
+    dnl Potentially add $additional_libdir to $LDFLAGS.
+    dnl But don't add it
+    dnl   1. if it's the standard /usr/lib,
+    dnl   2. if it's already present in $LDFLAGS,
+    dnl   3. if it's /usr/local/lib and we are using GCC on Linux,
+    dnl   4. if it doesn't exist as a directory.
+    if test "X$additional_libdir" != "X/usr/$acl_libdirstem"; then
+      haveit=
+      for x in $LDFLAGS; do
+        AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
+        if test "X$x" = "X-L$additional_libdir"; then
+          haveit=yes
+          break
+        fi
+      done
+      if test -z "$haveit"; then
+        if test "X$additional_libdir" = "X/usr/local/$acl_libdirstem"; then
+          if test -n "$GCC"; then
+            case $host_os in
+              linux*) haveit=yes;;
+            esac
+          fi
+        fi
+        if test -z "$haveit"; then
+          if test -d "$additional_libdir"; then
+            dnl Really add $additional_libdir to $LDFLAGS.
+            LDFLAGS="${LDFLAGS}${LDFLAGS:+ }-L$additional_libdir"
+          fi
+        fi
+      fi
+    fi
+  fi
+])
+
+dnl AC_LIB_PREPARE_PREFIX creates variables acl_final_prefix,
+dnl acl_final_exec_prefix, containing the values to which $prefix and
+dnl $exec_prefix will expand at the end of the configure script.
+AC_DEFUN([AC_LIB_PREPARE_PREFIX],
+[
+  dnl Unfortunately, prefix and exec_prefix get only finally determined
+  dnl at the end of configure.
+  if test "X$prefix" = "XNONE"; then
+    acl_final_prefix="$ac_default_prefix"
+  else
+    acl_final_prefix="$prefix"
+  fi
+  if test "X$exec_prefix" = "XNONE"; then
+    acl_final_exec_prefix='${prefix}'
+  else
+    acl_final_exec_prefix="$exec_prefix"
+  fi
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  eval acl_final_exec_prefix=\"$acl_final_exec_prefix\"
+  prefix="$acl_save_prefix"
+])
+
+dnl AC_LIB_WITH_FINAL_PREFIX([statement]) evaluates statement, with the
+dnl variables prefix and exec_prefix bound to the values they will have
+dnl at the end of the configure script.
+AC_DEFUN([AC_LIB_WITH_FINAL_PREFIX],
+[
+  acl_save_prefix="$prefix"
+  prefix="$acl_final_prefix"
+  acl_save_exec_prefix="$exec_prefix"
+  exec_prefix="$acl_final_exec_prefix"
+  $1
+  exec_prefix="$acl_save_exec_prefix"
+  prefix="$acl_save_prefix"
+])
+
+dnl AC_LIB_PREPARE_MULTILIB creates
+dnl - a function acl_is_expected_elfclass, that tests whether standard input
+dn;   has a 32-bit or 64-bit ELF header, depending on the host CPU ABI,
+dnl - 3 variables acl_libdirstem, acl_libdirstem2, acl_libdirstem3, containing
+dnl   the basename of the libdir to try in turn, either "lib" or "lib64" or
+dnl   "lib/64" or "lib32" or "lib/sparcv9" or "lib/amd64" or similar.
+AC_DEFUN([AC_LIB_PREPARE_MULTILIB],
+[
+  dnl There is no formal standard regarding lib, lib32, and lib64.
+  dnl On most glibc systems, the current practice is that on a system supporting
+  dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
+  dnl $prefix/lib64 and 32-bit libraries go under $prefix/lib. However, on
+  dnl Arch Linux based distributions, it's the opposite: 32-bit libraries go
+  dnl under $prefix/lib32 and 64-bit libraries go under $prefix/lib.
+  dnl We determine the compiler's default mode by looking at the compiler's
+  dnl library search path. If at least one of its elements ends in /lib64 or
+  dnl points to a directory whose absolute pathname ends in /lib64, we use that
+  dnl for 64-bit ABIs. Similarly for 32-bit ABIs. Otherwise we use the default,
+  dnl namely "lib".
+  dnl On Solaris systems, the current practice is that on a system supporting
+  dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
+  dnl $prefix/lib/64 (which is a symlink to either $prefix/lib/sparcv9 or
+  dnl $prefix/lib/amd64) and 32-bit libraries go under $prefix/lib.
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([gl_HOST_CPU_C_ABI_32BIT])
+
+  AC_CACHE_CHECK([for ELF binary format], [gl_cv_elf],
+    [AC_EGREP_CPP([Extensible Linking Format],
+       [#ifdef __ELF__
+        Extensible Linking Format
+        #endif
+       ],
+       [gl_cv_elf=yes],
+       [gl_cv_elf=no])
+    ])
+  if test $gl_cv_elf = yes; then
+    # Extract the ELF class of a file (5th byte) in decimal.
+    # Cf. https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#File_header
+    if od -A x < /dev/null >/dev/null 2>/dev/null; then
+      # Use POSIX od.
+      func_elfclass ()
+      {
+        od -A n -t d1 -j 4 -N 1
+      }
+    else
+      # Use BSD hexdump.
+      func_elfclass ()
+      {
+        dd bs=1 count=1 skip=4 2>/dev/null | hexdump -e '1/1 "%3d "'
+        echo
+      }
+    fi
+    # Use 'expr', not 'test', to compare the values of func_elfclass, because on
+    # Solaris 11 OpenIndiana and Solaris 11 OmniOS, the result is 001 or 002,
+    # not 1 or 2.
+changequote(,)dnl
+    case $HOST_CPU_C_ABI_32BIT in
+      yes)
+        # 32-bit ABI.
+        acl_is_expected_elfclass ()
+        {
+          expr "`func_elfclass | sed -e 's/[ 	]//g'`" = 1 > /dev/null
+        }
+        ;;
+      no)
+        # 64-bit ABI.
+        acl_is_expected_elfclass ()
+        {
+          expr "`func_elfclass | sed -e 's/[ 	]//g'`" = 2 > /dev/null
+        }
+        ;;
+      *)
+        # Unknown.
+        acl_is_expected_elfclass ()
+        {
+          :
+        }
+        ;;
+    esac
+changequote([,])dnl
+  else
+    acl_is_expected_elfclass ()
+    {
+      :
+    }
+  fi
+
+  dnl Allow the user to override the result by setting acl_cv_libdirstems.
+  AC_CACHE_CHECK([for the common suffixes of directories in the library search path],
+    [acl_cv_libdirstems],
+    [dnl Try 'lib' first, because that's the default for libdir in GNU, see
+     dnl <https://www.gnu.org/prep/standards/html_node/Directory-Variables.html>.
+     acl_libdirstem=lib
+     acl_libdirstem2=
+     acl_libdirstem3=
+     case "$host_os" in
+       solaris*)
+         dnl See Solaris 10 Software Developer Collection > Solaris 64-bit Developer's Guide > The Development Environment
+         dnl <https://docs.oracle.com/cd/E19253-01/816-5138/dev-env/index.html>.
+         dnl "Portable Makefiles should refer to any library directories using the 64 symbolic link."
+         dnl But we want to recognize the sparcv9 or amd64 subdirectory also if the
+         dnl symlink is missing, so we set acl_libdirstem2 too.
+         if test $HOST_CPU_C_ABI_32BIT = no; then
+           acl_libdirstem2=lib/64
+           case "$host_cpu" in
+             sparc*)        acl_libdirstem3=lib/sparcv9 ;;
+             i*86 | x86_64) acl_libdirstem3=lib/amd64 ;;
+           esac
+         fi
+         ;;
+       *)
+         dnl If $CC generates code for a 32-bit ABI, the libraries are
+         dnl surely under $prefix/lib or $prefix/lib32, not $prefix/lib64.
+         dnl Similarly, if $CC generates code for a 64-bit ABI, the libraries
+         dnl are surely under $prefix/lib or $prefix/lib64, not $prefix/lib32.
+         dnl Find the compiler's search path. However, non-system compilers
+         dnl sometimes have odd library search paths. But we can't simply invoke
+         dnl '/usr/bin/gcc -print-search-dirs' because that would not take into
+         dnl account the -m32/-m31 or -m64 options from the $CC or $CFLAGS.
+         searchpath=`(LC_ALL=C $CC $CPPFLAGS $CFLAGS -print-search-dirs) 2>/dev/null \
+                     | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`
+         if test $HOST_CPU_C_ABI_32BIT != no; then
+           # 32-bit or unknown ABI.
+           if test -d /usr/lib32; then
+             acl_libdirstem2=lib32
+           fi
+         fi
+         if test $HOST_CPU_C_ABI_32BIT != yes; then
+           # 64-bit or unknown ABI.
+           if test -d /usr/lib64; then
+             acl_libdirstem3=lib64
+           fi
+         fi
+         if test -n "$searchpath"; then
+           acl_save_IFS="${IFS= 	}"; IFS=":"
+           for searchdir in $searchpath; do
+             if test -d "$searchdir"; then
+               case "$searchdir" in
+                 */lib32/ | */lib32 ) acl_libdirstem2=lib32 ;;
+                 */lib64/ | */lib64 ) acl_libdirstem3=lib64 ;;
+                 */../ | */.. )
+                   # Better ignore directories of this form. They are misleading.
+                   ;;
+                 *) searchdir=`cd "$searchdir" && pwd`
+                    case "$searchdir" in
+                      */lib32 ) acl_libdirstem2=lib32 ;;
+                      */lib64 ) acl_libdirstem3=lib64 ;;
+                    esac ;;
+               esac
+             fi
+           done
+           IFS="$acl_save_IFS"
+           if test $HOST_CPU_C_ABI_32BIT = yes; then
+             # 32-bit ABI.
+             acl_libdirstem3=
+           fi
+           if test $HOST_CPU_C_ABI_32BIT = no; then
+             # 64-bit ABI.
+             acl_libdirstem2=
+           fi
+         fi
+         ;;
+     esac
+     test -n "$acl_libdirstem2" || acl_libdirstem2="$acl_libdirstem"
+     test -n "$acl_libdirstem3" || acl_libdirstem3="$acl_libdirstem"
+     acl_cv_libdirstems="$acl_libdirstem,$acl_libdirstem2,$acl_libdirstem3"
+    ])
+  dnl Decompose acl_cv_libdirstems into acl_libdirstem, acl_libdirstem2, and
+  dnl acl_libdirstem3.
+changequote(,)dnl
+  acl_libdirstem=`echo "$acl_cv_libdirstems" | sed -e 's/,.*//'`
+  acl_libdirstem2=`echo "$acl_cv_libdirstems" | sed -e 's/^[^,]*,//' -e 's/,.*//'`
+  acl_libdirstem3=`echo "$acl_cv_libdirstems" | sed -e 's/^[^,]*,[^,]*,//' -e 's/,.*//'`
+changequote([,])dnl
+])
diff --git a/src/grep/m4/libsigsegv.m4 b/src/grep/m4/libsigsegv.m4
new file mode 100644
index 0000000..3255235
--- /dev/null
+++ b/src/grep/m4/libsigsegv.m4
@@ -0,0 +1,16 @@
+# libsigsegv.m4 serial 4
+dnl Copyright (C) 2002-2003, 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible, Sam Steingold.
+
+AC_DEFUN([gl_LIBSIGSEGV],
+[
+  AC_LIB_HAVE_LINKFLAGS([sigsegv], [],
+    [#include <sigsegv.h>], [sigsegv_deinstall_handler();],
+    [no, consider installing GNU libsigsegv])
+  dnl Some other autoconf macros and clisp's configure use this variable.
+  gl_cv_lib_sigsegv="$ac_cv_libsigsegv"
+])
diff --git a/src/grep/m4/libunistring-base.m4 b/src/grep/m4/libunistring-base.m4
new file mode 100644
index 0000000..657bc0d
--- /dev/null
+++ b/src/grep/m4/libunistring-base.m4
@@ -0,0 +1,141 @@
+# libunistring-base.m4 serial 5
+dnl Copyright (C) 2010-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Paolo Bonzini and Bruno Haible.
+
+dnl gl_LIBUNISTRING_MODULE([VERSION], [Module])
+dnl Declares that the source files of Module should be compiled, unless we
+dnl are linking with libunistring and its version is >= the given VERSION.
+dnl Defines an automake conditional LIBUNISTRING_COMPILE_$MODULE that is
+dnl true if the source files of Module should be compiled.
+dnl This macro is to be used for public libunistring API, not for
+dnl undocumented API.
+dnl
+dnl You have to bump the VERSION argument to the next projected version
+dnl number each time you make a change that affects the behaviour of the
+dnl functions defined in Module (even if the sources of Module itself do not
+dnl change).
+
+AC_DEFUN([gl_LIBUNISTRING_MODULE],
+[
+  AC_REQUIRE([gl_LIBUNISTRING_LIB_PREPARE])
+  dnl Use the variables HAVE_LIBUNISTRING, LIBUNISTRING_VERSION from
+  dnl gl_LIBUNISTRING_CORE if that macro has been run.
+  AM_CONDITIONAL(AS_TR_CPP([LIBUNISTRING_COMPILE_$2]),
+    [gl_LIBUNISTRING_VERSION_CMP([$1])])
+])
+
+dnl gl_LIBUNISTRING_LIBHEADER([VERSION], [HeaderFile])
+dnl Declares that HeaderFile should be created, unless we are linking
+dnl with libunistring and its version is >= the given VERSION.
+dnl HeaderFile should be relative to the lib directory and end in '.h'.
+dnl Prepares for substituting LIBUNISTRING_HEADERFILE (to HeaderFile or empty).
+dnl
+dnl When we are linking with the already installed libunistring and its version
+dnl is < VERSION, we create HeaderFile here, because we may compile functions
+dnl (via gl_LIBUNISTRING_MODULE above) that are not contained in the installed
+dnl version.
+dnl When we are linking with the already installed libunistring and its version
+dnl is > VERSION, we don't create HeaderFile here: it could cause compilation
+dnl errors in other libunistring header files if some types are missing.
+dnl
+dnl You have to bump the VERSION argument to the next projected version
+dnl number each time you make a non-comment change to the HeaderFile.
+
+AC_DEFUN([gl_LIBUNISTRING_LIBHEADER],
+[
+  AC_REQUIRE([gl_LIBUNISTRING_LIB_PREPARE])
+  dnl Use the variables HAVE_LIBUNISTRING, LIBUNISTRING_VERSION from
+  dnl gl_LIBUNISTRING_CORE if that macro has been run.
+  if gl_LIBUNISTRING_VERSION_CMP([$1]); then
+    LIBUNISTRING_[]AS_TR_CPP([$2])='$2'
+  else
+    LIBUNISTRING_[]AS_TR_CPP([$2])=
+  fi
+  AC_SUBST([LIBUNISTRING_]AS_TR_CPP([$2]))
+])
+
+dnl Miscellaneous preparations/initializations.
+
+AC_DEFUN([gl_LIBUNISTRING_LIB_PREPARE],
+[
+  dnl Ensure that HAVE_LIBUNISTRING is fully determined at this point.
+  m4_ifdef([gl_LIBUNISTRING], [AC_REQUIRE([gl_LIBUNISTRING])])
+
+  AC_REQUIRE([AC_PROG_AWK])
+
+dnl Sed expressions to extract the parts of a version number.
+changequote(,)
+gl_libunistring_sed_extract_major='/^[0-9]/{s/^\([0-9]*\).*/\1/p;q;}
+i\
+0
+q
+'
+gl_libunistring_sed_extract_minor='/^[0-9][0-9]*[.][0-9]/{s/^[0-9]*[.]\([0-9]*\).*/\1/p;q;}
+i\
+0
+q
+'
+gl_libunistring_sed_extract_subminor='/^[0-9][0-9]*[.][0-9][0-9]*[.][0-9]/{s/^[0-9]*[.][0-9]*[.]\([0-9]*\).*/\1/p;q;}
+i\
+0
+q
+'
+changequote([,])
+
+  if test "$HAVE_LIBUNISTRING" = yes; then
+    LIBUNISTRING_VERSION_MAJOR=`echo "$LIBUNISTRING_VERSION" | sed -n -e "$gl_libunistring_sed_extract_major"`
+    LIBUNISTRING_VERSION_MINOR=`echo "$LIBUNISTRING_VERSION" | sed -n -e "$gl_libunistring_sed_extract_minor"`
+    LIBUNISTRING_VERSION_SUBMINOR=`echo "$LIBUNISTRING_VERSION" | sed -n -e "$gl_libunistring_sed_extract_subminor"`
+  fi
+])
+
+dnl gl_LIBUNISTRING_VERSION_CMP([VERSION])
+dnl Expands to a shell statement that evaluates to true if LIBUNISTRING_VERSION
+dnl is less than the VERSION argument.
+AC_DEFUN([gl_LIBUNISTRING_VERSION_CMP],
+[ { test "$HAVE_LIBUNISTRING" != yes \
+    || {
+         dnl AS_LITERAL_IF exists and works fine since autoconf-2.59 at least.
+         AS_LITERAL_IF([$1],
+           [dnl This is the optimized variant, that assumes the argument is a literal:
+            m4_pushdef([requested_version_major],
+              [gl_LIBUNISTRING_ARG_OR_ZERO(m4_bpatsubst([$1], [^\([0-9]*\).*], [\1]), [])])
+            m4_pushdef([requested_version_minor],
+              [gl_LIBUNISTRING_ARG_OR_ZERO(m4_bpatsubst([$1], [^[0-9]*[.]\([0-9]*\).*], [\1]), [$1])])
+            m4_pushdef([requested_version_subminor],
+              [gl_LIBUNISTRING_ARG_OR_ZERO(m4_bpatsubst([$1], [^[0-9]*[.][0-9]*[.]\([0-9]*\).*], [\1]), [$1])])
+            test $LIBUNISTRING_VERSION_MAJOR -lt requested_version_major \
+            || { test $LIBUNISTRING_VERSION_MAJOR -eq requested_version_major \
+                 && { test $LIBUNISTRING_VERSION_MINOR -lt requested_version_minor \
+                      || { test $LIBUNISTRING_VERSION_MINOR -eq requested_version_minor \
+                           && test $LIBUNISTRING_VERSION_SUBMINOR -lt requested_version_subminor
+                         }
+                    }
+               }
+            m4_popdef([requested_version_subminor])
+            m4_popdef([requested_version_minor])
+            m4_popdef([requested_version_major])
+           ],
+           [dnl This is the unoptimized variant:
+            requested_version_major=`echo '$1' | sed -n -e "$gl_libunistring_sed_extract_major"`
+            requested_version_minor=`echo '$1' | sed -n -e "$gl_libunistring_sed_extract_minor"`
+            requested_version_subminor=`echo '$1' | sed -n -e "$gl_libunistring_sed_extract_subminor"`
+            test $LIBUNISTRING_VERSION_MAJOR -lt $requested_version_major \
+            || { test $LIBUNISTRING_VERSION_MAJOR -eq $requested_version_major \
+                 && { test $LIBUNISTRING_VERSION_MINOR -lt $requested_version_minor \
+                      || { test $LIBUNISTRING_VERSION_MINOR -eq $requested_version_minor \
+                           && test $LIBUNISTRING_VERSION_SUBMINOR -lt $requested_version_subminor
+                         }
+                    }
+               }
+           ])
+       }
+  }])
+
+dnl gl_LIBUNISTRING_ARG_OR_ZERO([ARG], [ORIG]) expands to ARG if it is not the
+dnl same as ORIG, otherwise to 0.
+m4_define([gl_LIBUNISTRING_ARG_OR_ZERO], [m4_if([$1], [$2], [0], [$1])])
diff --git a/src/grep/m4/limits-h.m4 b/src/grep/m4/limits-h.m4
new file mode 100644
index 0000000..00c9fe9
--- /dev/null
+++ b/src/grep/m4/limits-h.m4
@@ -0,0 +1,44 @@
+dnl Check whether limits.h has needed features.
+
+dnl Copyright 2016-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Paul Eggert.
+
+AC_DEFUN_ONCE([gl_LIMITS_H],
+[
+  gl_CHECK_NEXT_HEADERS([limits.h])
+
+  AC_CACHE_CHECK([whether limits.h has WORD_BIT, BOOL_WIDTH etc.],
+    [gl_cv_header_limits_width],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#ifndef __STDC_WANT_IEC_60559_BFP_EXT__
+             #define __STDC_WANT_IEC_60559_BFP_EXT__ 1
+            #endif
+            #include <limits.h>
+            long long llm = LLONG_MAX;
+            int wb = WORD_BIT;
+            int ullw = ULLONG_WIDTH;
+            int bw = BOOL_WIDTH;
+          ]])],
+       [gl_cv_header_limits_width=yes],
+       [gl_cv_header_limits_width=no])])
+  if test "$gl_cv_header_limits_width" = yes; then
+    LIMITS_H=
+  else
+    LIMITS_H=limits.h
+  fi
+  AC_SUBST([LIMITS_H])
+  AM_CONDITIONAL([GL_GENERATE_LIMITS_H], [test -n "$LIMITS_H"])
+])
+
+dnl Unconditionally enables the replacement of <limits.h>.
+AC_DEFUN([gl_REPLACE_LIMITS_H],
+[
+  AC_REQUIRE([gl_LIMITS_H])
+  LIMITS_H='limits.h'
+  AM_CONDITIONAL([GL_GENERATE_LIMITS_H], [test -n "$LIMITS_H"])
+])
diff --git a/src/grep/m4/localcharset.m4 b/src/grep/m4/localcharset.m4
new file mode 100644
index 0000000..04389fc
--- /dev/null
+++ b/src/grep/m4/localcharset.m4
@@ -0,0 +1,11 @@
+# localcharset.m4 serial 8
+dnl Copyright (C) 2002, 2004, 2006, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_LOCALCHARSET],
+[
+  dnl Prerequisites of lib/localcharset.c.
+  AC_REQUIRE([AM_LANGINFO_CODESET])
+])
diff --git a/src/grep/m4/locale-fr.m4 b/src/grep/m4/locale-fr.m4
new file mode 100644
index 0000000..b61df7e
--- /dev/null
+++ b/src/grep/m4/locale-fr.m4
@@ -0,0 +1,253 @@
+# locale-fr.m4 serial 20
+dnl Copyright (C) 2003, 2005-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+
+dnl Determine the name of a french locale with traditional encoding.
+AC_DEFUN([gt_LOCALE_FR],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([AM_LANGINFO_CODESET])
+  AC_CACHE_CHECK([for a traditional french locale], [gt_cv_locale_fr], [
+    AC_LANG_CONFTEST([AC_LANG_SOURCE([[
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is only
+     one byte long. This excludes the UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 3 || buf[2] != 'v') return 1;
+# if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+# endif
+  return 0;
+#endif
+}
+      ]])])
+    if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the native Windows locale name.
+          if (LC_ALL=French_France.1252 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=French_France.1252
+          else
+            # None found.
+            gt_cv_locale_fr=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.ISO-8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr=fr_FR.ISO-8859-1
+            else
+              # Test for the AIX, OSF/1, FreeBSD, NetBSD, OpenBSD locale name.
+              if (LC_ALL=fr_FR.ISO8859-1 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr=fr_FR.ISO8859-1
+              else
+                # Test for the HP-UX locale name.
+                if (LC_ALL=fr_FR.iso88591 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_fr=fr_FR.iso88591
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=fr LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_fr=fr
+                  else
+                    # None found.
+                    gt_cv_locale_fr=none
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+  ])
+  LOCALE_FR=$gt_cv_locale_fr
+  AC_SUBST([LOCALE_FR])
+])
+
+dnl Determine the name of a french locale with UTF-8 encoding.
+AC_DEFUN([gt_LOCALE_FR_UTF8],
+[
+  AC_REQUIRE([AM_LANGINFO_CODESET])
+  AC_CACHE_CHECK([for a french Unicode locale], [gt_cv_locale_fr_utf8], [
+    AC_LANG_CONFTEST([AC_LANG_SOURCE([[
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if !(defined __BEOS__ || defined __HAIKU__)
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is
+     two bytes long, with UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 4
+      || buf[1] != (char) 0xc3 || buf[2] != (char) 0xa9 || buf[3] != 'v')
+    return 1;
+#endif
+#if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+#endif
+  return 0;
+}
+      ]])])
+    if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=French_France.65001 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=French_France.65001
+          else
+            # None found.
+            gt_cv_locale_fr_utf8=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_fr_utf8=fr_FR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=fr_FR.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_fr_utf8=fr_FR.UTF-8
+            else
+              # Test for the Solaris 7 locale name.
+              if (LC_ALL=fr.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr_utf8=fr.UTF-8
+              else
+                # None found.
+                gt_cv_locale_fr_utf8=none
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+  ])
+  LOCALE_FR_UTF8=$gt_cv_locale_fr_utf8
+  AC_SUBST([LOCALE_FR_UTF8])
+])
diff --git a/src/grep/m4/locale-ja.m4 b/src/grep/m4/locale-ja.m4
new file mode 100644
index 0000000..cd94288
--- /dev/null
+++ b/src/grep/m4/locale-ja.m4
@@ -0,0 +1,143 @@
+# locale-ja.m4 serial 15
+dnl Copyright (C) 2003, 2005-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+
+dnl Determine the name of a japanese locale with EUC-JP encoding.
+AC_DEFUN([gt_LOCALE_JA],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([AM_LANGINFO_CODESET])
+  AC_CACHE_CHECK([for a traditional japanese locale], [gt_cv_locale_ja], [
+    AC_LANG_CONFTEST([AC_LANG_SOURCE([[
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether MB_CUR_MAX is > 1.  This excludes the dysfunctional locales
+     on Cygwin 1.5.x.  */
+  if (MB_CUR_MAX == 1)
+    return 1;
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding (except on MirBSD).  */
+  {
+    const char *p;
+    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+    for (p = buf; *p != '\0'; p++)
+      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+        return 1;
+  }
+  return 0;
+#endif
+}
+      ]])])
+    if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Note that on native Windows, the Japanese locale is
+          # Japanese_Japan.932, and CP932 is very different from EUC-JP, so we
+          # cannot use it here.
+          gt_cv_locale_ja=none
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the AIX locale name.
+          if (LC_ALL=ja_JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_ja=ja_JP
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=ja_JP.EUC-JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_ja=ja_JP.EUC-JP
+            else
+              # Test for the HP-UX, OSF/1, NetBSD locale name.
+              if (LC_ALL=ja_JP.eucJP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_ja=ja_JP.eucJP
+              else
+                # Test for the IRIX, FreeBSD locale name.
+                if (LC_ALL=ja_JP.EUC LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_ja=ja_JP.EUC
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=ja LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_ja=ja
+                  else
+                    # Special test for NetBSD 1.6.
+                    if test -f /usr/share/locale/ja_JP.eucJP/LC_CTYPE; then
+                      gt_cv_locale_ja=ja_JP.eucJP
+                    else
+                      # None found.
+                      gt_cv_locale_ja=none
+                    fi
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+  ])
+  LOCALE_JA=$gt_cv_locale_ja
+  AC_SUBST([LOCALE_JA])
+])
diff --git a/src/grep/m4/locale-tr.m4 b/src/grep/m4/locale-tr.m4
new file mode 100644
index 0000000..ecb8b60
--- /dev/null
+++ b/src/grep/m4/locale-tr.m4
@@ -0,0 +1,126 @@
+# locale-tr.m4 serial 13
+dnl Copyright (C) 2003, 2005-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+
+dnl Determine the name of a turkish locale with UTF-8 encoding.
+AC_DEFUN([gt_LOCALE_TR_UTF8],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([AM_LANGINFO_CODESET])
+  AC_CACHE_CHECK([for a turkish Unicode locale], [gt_cv_locale_tr_utf8], [
+    AC_LANG_CONFTEST([AC_LANG_SOURCE([[
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+#include <wctype.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  But BeOS does not
+     implement the Turkish upper-/lowercase mappings.  Therefore, let this
+     program return 1 on BeOS.  */
+  /* Check whether the given locale name is recognized by the system.  */
+#if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+#else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+#endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the tr_TR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+#if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+#endif
+#ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+#endif
+  /* Check whether in the abbreviation of the eighth month, the second
+     character (should be U+011F: LATIN SMALL LETTER G WITH BREVE) is
+     two bytes long, with UTF-8 encoding.  */
+  t.tm_year = 1992 - 1900; t.tm_mon = 8 - 1; t.tm_mday = 19;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 4
+      || buf[1] != (char) 0xc4 || buf[2] != (char) 0x9f)
+    return 1;
+  /* Check whether the upper-/lowercase mappings are as expected for
+     Turkish.  */
+  if (towupper ('i') != 0x0130 || towlower (0x0130) != 'i'
+      || towupper(0x0131) != 'I' || towlower ('I') != 0x0131)
+    return 1;
+  return 0;
+}
+      ]])])
+    if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=Turkish_Turkey.65001 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_tr_utf8=Turkish_Turkey.65001
+          else
+            # None found.
+            gt_cv_locale_tr_utf8=none
+          fi
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the usual locale name.
+          if (LC_ALL=tr_TR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_tr_utf8=tr_TR
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=tr_TR.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_tr_utf8=tr_TR.UTF-8
+            else
+              # Test for the Solaris 7 locale name.
+              if (LC_ALL=tr.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_tr_utf8=tr.UTF-8
+              else
+                # None found.
+                gt_cv_locale_tr_utf8=none
+              fi
+            fi
+          fi
+          ;;
+      esac
+    else
+      gt_cv_locale_tr_utf8=none
+    fi
+    rm -fr conftest*
+  ])
+  LOCALE_TR_UTF8=$gt_cv_locale_tr_utf8
+  AC_SUBST([LOCALE_TR_UTF8])
+])
diff --git a/src/grep/m4/locale-zh.m4 b/src/grep/m4/locale-zh.m4
new file mode 100644
index 0000000..1228be8
--- /dev/null
+++ b/src/grep/m4/locale-zh.m4
@@ -0,0 +1,137 @@
+# locale-zh.m4 serial 15
+dnl Copyright (C) 2003, 2005-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+
+dnl Determine the name of a chinese locale with GB18030 encoding.
+AC_DEFUN([gt_LOCALE_ZH_CN],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([AM_LANGINFO_CODESET])
+  AC_CACHE_CHECK([for a transitional chinese locale], [gt_cv_locale_zh_CN], [
+    AC_LANG_CONFTEST([AC_LANG_SOURCE([[
+#include <locale.h>
+#include <stdlib.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding (except on MirBSD).  */
+  {
+    const char *p;
+    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+    for (p = buf; *p != '\0'; p++)
+      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+        return 1;
+  }
+  /* Check whether a typical GB18030 multibyte sequence is recognized as a
+     single wide character.  This excludes the GB2312 and GBK encodings.  */
+  if (mblen ("\203\062\332\066", 5) != 4)
+    return 1;
+  return 0;
+#endif
+}
+      ]])])
+    if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=Chinese_China.54936 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=Chinese_China.54936
+          else
+            # None found.
+            gt_cv_locale_zh_CN=none
+          fi
+          ;;
+        solaris2.8)
+          # On Solaris 8, the locales zh_CN.GB18030, zh_CN.GBK, zh.GBK are
+          # broken. One witness is the test case in gl_MBRTOWC_SANITYCHECK.
+          # Another witness is that "LC_ALL=zh_CN.GB18030 bash -c true" dumps core.
+          gt_cv_locale_zh_CN=none
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the locale name without encoding suffix.
+          if (LC_ALL=zh_CN LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=zh_CN
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=zh_CN.GB18030 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_zh_CN=zh_CN.GB18030
+            else
+              # None found.
+              gt_cv_locale_zh_CN=none
+            fi
+          fi
+          ;;
+      esac
+    else
+      # If there was a link error, due to mblen(), the system is so old that
+      # it certainly doesn't have a chinese locale.
+      gt_cv_locale_zh_CN=none
+    fi
+    rm -fr conftest*
+  ])
+  LOCALE_ZH_CN=$gt_cv_locale_zh_CN
+  AC_SUBST([LOCALE_ZH_CN])
+])
diff --git a/src/grep/m4/locale_h.m4 b/src/grep/m4/locale_h.m4
new file mode 100644
index 0000000..444a381
--- /dev/null
+++ b/src/grep/m4/locale_h.m4
@@ -0,0 +1,174 @@
+# locale_h.m4 serial 28
+dnl Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN_ONCE([gl_LOCALE_H],
+[
+  dnl Ensure to expand the default settings once only, before all statements
+  dnl that occur in other macros.
+  AC_REQUIRE([gl_LOCALE_H_DEFAULTS])
+
+  dnl Persuade glibc <locale.h> to define locale_t and the int_p_*, int_n_*
+  dnl members of 'struct lconv'.
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+  dnl If <stddef.h> is replaced, then <locale.h> must also be replaced.
+  AC_REQUIRE([gl_STDDEF_H])
+
+  AC_REQUIRE([gl_LOCALE_T])
+
+  dnl Solaris 11.0 defines the int_p_*, int_n_* members of 'struct lconv'
+  dnl only if _LCONV_C99 is defined.
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  case "$host_os" in
+    solaris*)
+      AC_DEFINE([_LCONV_C99], [1], [Define to 1 on Solaris.])
+      ;;
+  esac
+
+  AC_CACHE_CHECK([whether locale.h conforms to POSIX:2001],
+    [gl_cv_header_locale_h_posix2001],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <locale.h>
+            int x = LC_MESSAGES;
+            int y = sizeof (((struct lconv *) 0)->decimal_point);]],
+          [[]])],
+       [gl_cv_header_locale_h_posix2001=yes],
+       [gl_cv_header_locale_h_posix2001=no])])
+
+  dnl Check whether 'struct lconv' is complete.
+  dnl Bionic libc's 'struct lconv' is just a dummy.
+  dnl On OpenBSD 4.9, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 9, Cygwin 1.5.x,
+  dnl mingw, MSVC 9, it lacks the int_p_* and int_n_* members.
+  AC_CACHE_CHECK([whether struct lconv is properly defined],
+    [gl_cv_sys_struct_lconv_ok],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <locale.h>
+            struct lconv l;
+            int x = sizeof (l.decimal_point);
+            int y = sizeof (l.int_p_cs_precedes);]],
+          [[]])],
+       [gl_cv_sys_struct_lconv_ok=yes],
+       [gl_cv_sys_struct_lconv_ok=no])
+    ])
+  if test $gl_cv_sys_struct_lconv_ok = no; then
+    dnl On native Windows with MSVC, merely define these member names as macros.
+    dnl This avoids trouble in C++ mode.
+    case "$host_os" in
+      mingw*)
+        AC_EGREP_CPP([Special], [
+#ifdef _MSC_VER
+ Special
+#endif
+          ],
+          [],
+          [REPLACE_STRUCT_LCONV=1])
+        ;;
+      *) REPLACE_STRUCT_LCONV=1 ;;
+    esac
+  fi
+
+  dnl <locale.h> is always overridden, because of GNULIB_POSIXCHECK.
+  gl_NEXT_HEADERS([locale.h])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[#include <locale.h>
+/* Some systems provide declarations in a non-standard header.  */
+#if HAVE_XLOCALE_H
+# include <xlocale.h>
+#endif
+    ]],
+    [setlocale newlocale duplocale freelocale])
+])
+
+dnl Checks to determine whether the system has the locale_t type,
+dnl and how to obtain it.
+AC_DEFUN([gl_LOCALE_T],
+[
+  dnl Persuade glibc and Solaris <locale.h> to define locale_t.
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+  dnl Check whether use of locale_t requires inclusion of <xlocale.h>,
+  dnl e.g. on Mac OS X 10.5. If <locale.h> does not define locale_t by
+  dnl itself, we assume that <xlocale.h> will do so.
+  AC_CACHE_CHECK([whether locale.h defines locale_t],
+    [gl_cv_header_locale_has_locale_t],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <locale.h>
+            locale_t x;]],
+          [[]])],
+       [gl_cv_header_locale_has_locale_t=yes],
+       [gl_cv_header_locale_has_locale_t=no])
+    ])
+
+  dnl Check for <xlocale.h>.
+  AC_CHECK_HEADERS_ONCE([xlocale.h])
+  if test $ac_cv_header_xlocale_h = yes; then
+    HAVE_XLOCALE_H=1
+    if test $gl_cv_header_locale_has_locale_t = yes; then
+      gl_cv_header_locale_h_needs_xlocale_h=no
+    else
+      gl_cv_header_locale_h_needs_xlocale_h=yes
+    fi
+    HAVE_LOCALE_T=1
+  else
+    HAVE_XLOCALE_H=0
+    gl_cv_header_locale_h_needs_xlocale_h=no
+    if test $gl_cv_header_locale_has_locale_t = yes; then
+      HAVE_LOCALE_T=1
+    else
+      HAVE_LOCALE_T=0
+    fi
+  fi
+  AC_SUBST([HAVE_XLOCALE_H])
+])
+
+# gl_LOCALE_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_LOCALE_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_LOCALE_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_LOCALE_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_LOCALE_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LOCALECONV])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SETLOCALE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SETLOCALE_NULL])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_DUPLOCALE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LOCALENAME])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_LOCALE_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_LOCALE_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_LOCALE_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_NEWLOCALE=1;       AC_SUBST([HAVE_NEWLOCALE])
+  HAVE_DUPLOCALE=1;       AC_SUBST([HAVE_DUPLOCALE])
+  HAVE_FREELOCALE=1;      AC_SUBST([HAVE_FREELOCALE])
+  REPLACE_LOCALECONV=0;   AC_SUBST([REPLACE_LOCALECONV])
+  REPLACE_SETLOCALE=0;    AC_SUBST([REPLACE_SETLOCALE])
+  REPLACE_NEWLOCALE=0;    AC_SUBST([REPLACE_NEWLOCALE])
+  REPLACE_DUPLOCALE=0;    AC_SUBST([REPLACE_DUPLOCALE])
+  REPLACE_FREELOCALE=0;   AC_SUBST([REPLACE_FREELOCALE])
+  REPLACE_STRUCT_LCONV=0; AC_SUBST([REPLACE_STRUCT_LCONV])
+  LOCALENAME_ENHANCE_LOCALE_FUNCS=0; AC_SUBST([LOCALENAME_ENHANCE_LOCALE_FUNCS])
+])
diff --git a/src/grep/m4/localeconv.m4 b/src/grep/m4/localeconv.m4
new file mode 100644
index 0000000..e29c7c3
--- /dev/null
+++ b/src/grep/m4/localeconv.m4
@@ -0,0 +1,22 @@
+# localeconv.m4 serial 1
+dnl Copyright (C) 2012-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_LOCALECONV],
+[
+  AC_REQUIRE([gl_LOCALE_H_DEFAULTS])
+  AC_REQUIRE([gl_LOCALE_H])
+
+  if test $REPLACE_STRUCT_LCONV = 1; then
+    REPLACE_LOCALECONV=1
+  fi
+])
+
+# Prerequisites of lib/localeconv.c.
+AC_DEFUN([gl_PREREQ_LOCALECONV],
+[
+  AC_CHECK_MEMBERS([struct lconv.decimal_point], [], [],
+    [[#include <locale.h>]])
+])
diff --git a/src/grep/m4/localename.m4 b/src/grep/m4/localename.m4
new file mode 100644
index 0000000..2bff33d
--- /dev/null
+++ b/src/grep/m4/localename.m4
@@ -0,0 +1,41 @@
+# localename.m4 serial 8
+dnl Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_LOCALENAME],
+[
+  AC_REQUIRE([gl_LOCALE_H_DEFAULTS])
+  AC_REQUIRE([gl_LOCALE_T])
+  AC_REQUIRE([gt_LC_MESSAGES])
+  AC_REQUIRE([gt_INTL_THREAD_LOCALE_NAME])
+  AC_REQUIRE([gt_INTL_MACOSX])
+  AC_CHECK_HEADERS_ONCE([langinfo.h])
+  if test $HAVE_LOCALE_T = 1; then
+    AC_CHECK_FUNCS_ONCE([newlocale duplocale freelocale])
+    gl_func_newlocale="$ac_cv_func_newlocale"
+    gl_func_duplocale="$ac_cv_func_duplocale"
+    gl_func_freelocale="$ac_cv_func_freelocale"
+  else
+    dnl In 2019, some versions of z/OS lack the locale_t type and have broken
+    dnl newlocale, duplocale, freelocale functions.
+    gl_func_newlocale=no
+    gl_func_duplocale=no
+    gl_func_freelocale=no
+  fi
+  if test $gl_func_newlocale != yes; then
+    HAVE_NEWLOCALE=0
+  fi
+  if test $gl_func_duplocale != yes; then
+    HAVE_DUPLOCALE=0
+  fi
+  if test $gl_func_freelocale != yes; then
+    HAVE_FREELOCALE=0
+  fi
+  if test $gt_localename_enhances_locale_funcs = yes; then
+    REPLACE_NEWLOCALE=1
+    REPLACE_DUPLOCALE=1
+    REPLACE_FREELOCALE=1
+  fi
+])
diff --git a/src/grep/m4/lock.m4 b/src/grep/m4/lock.m4
new file mode 100644
index 0000000..d68c12d
--- /dev/null
+++ b/src/grep/m4/lock.m4
@@ -0,0 +1,47 @@
+# lock.m4 serial 14
+dnl Copyright (C) 2005-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+
+AC_DEFUN([gl_LOCK],
+[
+  AC_REQUIRE([gl_THREADLIB])
+  if test "$gl_threads_api" = posix; then
+    # OSF/1 4.0 and Mac OS X 10.1 lack the pthread_rwlock_t type and the
+    # pthread_rwlock_* functions.
+    has_rwlock=false
+    AC_CHECK_TYPE([pthread_rwlock_t],
+      [has_rwlock=true
+       AC_DEFINE([HAVE_PTHREAD_RWLOCK], [1],
+         [Define if the POSIX multithreading library has read/write locks.])],
+      [],
+      [#include <pthread.h>])
+    if $has_rwlock; then
+      gl_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER
+    fi
+    # glibc defines PTHREAD_MUTEX_RECURSIVE as enum, not as a macro.
+    AC_COMPILE_IFELSE([
+      AC_LANG_PROGRAM(
+        [[#include <pthread.h>]],
+        [[
+#if __FreeBSD__ == 4
+error "No, in FreeBSD 4.0 recursive mutexes actually don't work."
+#elif (defined __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ \
+       && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1070)
+error "No, in Mac OS X < 10.7 recursive mutexes actually don't work."
+#else
+int x = (int)PTHREAD_MUTEX_RECURSIVE;
+return !x;
+#endif
+        ]])],
+      [AC_DEFINE([HAVE_PTHREAD_MUTEX_RECURSIVE], [1],
+         [Define if the <pthread.h> defines PTHREAD_MUTEX_RECURSIVE.])])
+  fi
+  gl_PREREQ_LOCK
+])
+
+# Prerequisites of lib/glthread/lock.c.
+AC_DEFUN([gl_PREREQ_LOCK], [:])
diff --git a/src/grep/m4/lseek.m4 b/src/grep/m4/lseek.m4
new file mode 100644
index 0000000..0af6378
--- /dev/null
+++ b/src/grep/m4/lseek.m4
@@ -0,0 +1,72 @@
+# lseek.m4 serial 11
+dnl Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_LSEEK],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([AC_PROG_CC])
+  AC_CHECK_HEADERS_ONCE([unistd.h])
+  AC_CACHE_CHECK([whether lseek detects pipes], [gl_cv_func_lseek_pipe],
+    [case "$host_os" in
+       mingw*)
+         dnl Native Windows.
+         dnl The result of lseek (fd, (off_t)0, SEEK_CUR) or
+         dnl SetFilePointer(handle, 0, NULL, FILE_CURRENT)
+         dnl for a pipe depends on the environment: In a Cygwin 1.5
+         dnl environment it succeeds (wrong); in a Cygwin 1.7 environment
+         dnl it fails with a wrong errno value.
+         gl_cv_func_lseek_pipe=no
+         ;;
+       *)
+         if test $cross_compiling = no; then
+           AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h> /* for off_t */
+#include <stdio.h> /* for SEEK_CUR */
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#else /* on Windows with MSVC */
+# include <io.h>
+#endif
+]GL_MDA_DEFINES],
+[[
+  /* Exit with success only if stdin is seekable.  */
+  return lseek (0, (off_t)0, SEEK_CUR) < 0;
+]])],
+             [if test -s conftest$ac_exeext \
+                 && ./conftest$ac_exeext < conftest.$ac_ext \
+                 && test 1 = "`echo hi \
+                   | { ./conftest$ac_exeext; echo $?; cat >/dev/null; }`"; then
+                gl_cv_func_lseek_pipe=yes
+              else
+                gl_cv_func_lseek_pipe=no
+              fi
+             ],
+             [gl_cv_func_lseek_pipe=no])
+         else
+           AC_COMPILE_IFELSE(
+             [AC_LANG_SOURCE([[
+#if defined __BEOS__
+/* BeOS mistakenly return 0 when trying to seek on pipes.  */
+  Choke me.
+#endif]])],
+             [gl_cv_func_lseek_pipe=yes], [gl_cv_func_lseek_pipe=no])
+         fi
+         ;;
+     esac
+    ])
+  if test $gl_cv_func_lseek_pipe = no; then
+    REPLACE_LSEEK=1
+    AC_DEFINE([LSEEK_PIPE_BROKEN], [1],
+      [Define to 1 if lseek does not detect pipes.])
+  fi
+
+  AC_REQUIRE([gl_SYS_TYPES_H])
+  if test $WINDOWS_64_BIT_OFF_T = 1; then
+    REPLACE_LSEEK=1
+  fi
+])
diff --git a/src/grep/m4/lstat.m4 b/src/grep/m4/lstat.m4
new file mode 100644
index 0000000..62e9db2
--- /dev/null
+++ b/src/grep/m4/lstat.m4
@@ -0,0 +1,79 @@
+# serial 33
+
+# Copyright (C) 1997-2001, 2003-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+dnl From Jim Meyering.
+
+AC_DEFUN([gl_FUNC_LSTAT],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
+  dnl If lstat does not exist, the replacement <sys/stat.h> does
+  dnl "#define lstat stat", and lstat.c is a no-op.
+  AC_CHECK_FUNCS_ONCE([lstat])
+  if test $ac_cv_func_lstat = yes; then
+    AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
+    case $host_os,$gl_cv_func_lstat_dereferences_slashed_symlink in
+      solaris* | *no)
+        REPLACE_LSTAT=1
+        ;;
+    esac
+  else
+    HAVE_LSTAT=0
+  fi
+])
+
+# Prerequisites of lib/lstat.c.
+AC_DEFUN([gl_PREREQ_LSTAT], [:])
+
+AC_DEFUN([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK],
+[
+  dnl We don't use AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK any more, because it
+  dnl is no longer maintained in Autoconf and because it invokes AC_LIBOBJ.
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether lstat correctly handles trailing slash],
+    [gl_cv_func_lstat_dereferences_slashed_symlink],
+    [rm -f conftest.sym conftest.file
+     echo >conftest.file
+     AC_RUN_IFELSE(
+       [AC_LANG_PROGRAM(
+          [AC_INCLUDES_DEFAULT],
+          [[struct stat sbuf;
+            if (symlink ("conftest.file", "conftest.sym") != 0)
+              return 1;
+            /* Linux will dereference the symlink and fail, as required by
+               POSIX.  That is better in the sense that it means we will not
+               have to compile and use the lstat wrapper.  */
+            return lstat ("conftest.sym/", &sbuf) == 0;
+          ]])],
+       [gl_cv_func_lstat_dereferences_slashed_symlink=yes],
+       [gl_cv_func_lstat_dereferences_slashed_symlink=no],
+       [case "$host_os" in
+          linux-* | linux)
+            # Guess yes on Linux systems.
+            gl_cv_func_lstat_dereferences_slashed_symlink="guessing yes" ;;
+          *-gnu* | gnu*)
+            # Guess yes on glibc systems.
+            gl_cv_func_lstat_dereferences_slashed_symlink="guessing yes" ;;
+          mingw*)
+            # Guess no on native Windows.
+            gl_cv_func_lstat_dereferences_slashed_symlink="guessing no" ;;
+          *)
+            # If we don't know, obey --enable-cross-guesses.
+            gl_cv_func_lstat_dereferences_slashed_symlink="$gl_cross_guess_normal" ;;
+        esac
+       ])
+     rm -f conftest.sym conftest.file
+    ])
+  case "$gl_cv_func_lstat_dereferences_slashed_symlink" in
+    *yes)
+      AC_DEFINE_UNQUOTED([LSTAT_FOLLOWS_SLASHED_SYMLINK], [1],
+        [Define to 1 if 'lstat' dereferences a symlink specified
+         with a trailing slash.])
+      ;;
+  esac
+])
diff --git a/src/grep/m4/malloc.m4 b/src/grep/m4/malloc.m4
new file mode 100644
index 0000000..972e808
--- /dev/null
+++ b/src/grep/m4/malloc.m4
@@ -0,0 +1,174 @@
+# malloc.m4 serial 27
+dnl Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# This is adapted with modifications from upstream Autoconf here:
+# https://git.savannah.gnu.org/cgit/autoconf.git/tree/lib/autoconf/functions.m4?id=v2.70#n949
+AC_DEFUN([_AC_FUNC_MALLOC_IF],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])dnl for cross-compiles
+  AC_CACHE_CHECK([whether malloc (0) returns nonnull],
+    [ac_cv_func_malloc_0_nonnull],
+    [AC_RUN_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <stdlib.h>
+          ]],
+          [[void *p = malloc (0);
+            int result = !p;
+            free (p);
+            return result;]])
+       ],
+       [ac_cv_func_malloc_0_nonnull=yes],
+       [ac_cv_func_malloc_0_nonnull=no],
+       [case "$host_os" in
+          # Guess yes on platforms where we know the result.
+          *-gnu* | freebsd* | netbsd* | openbsd* | bitrig* \
+          | gnu* | *-musl* | midnightbsd* \
+          | hpux* | solaris* | cygwin* | mingw* | msys* )
+            ac_cv_func_malloc_0_nonnull="guessing yes" ;;
+          # If we don't know, obey --enable-cross-guesses.
+          *) ac_cv_func_malloc_0_nonnull="$gl_cross_guess_normal" ;;
+        esac
+       ])
+    ])
+  AS_CASE([$ac_cv_func_malloc_0_nonnull], [*yes], [$1], [$2])
+])# _AC_FUNC_MALLOC_IF
+
+# gl_FUNC_MALLOC_GNU
+# ------------------
+# Replace malloc if it is not compatible with GNU libc.
+AC_DEFUN([gl_FUNC_MALLOC_GNU],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_MALLOC_POSIX])
+  if test $REPLACE_MALLOC = 0; then
+    _AC_FUNC_MALLOC_IF([], [REPLACE_MALLOC=1])
+  fi
+])
+
+# gl_FUNC_MALLOC_PTRDIFF
+# ----------------------
+# Test whether malloc (N) reliably fails when N exceeds PTRDIFF_MAX,
+# and replace malloc otherwise.
+AC_DEFUN([gl_FUNC_MALLOC_PTRDIFF],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([gl_CHECK_MALLOC_PTRDIFF])
+  test "$gl_cv_malloc_ptrdiff" = yes || REPLACE_MALLOC=1
+])
+
+# Test whether malloc, realloc, calloc refuse to create objects
+# larger than what can be expressed in ptrdiff_t.
+# Set gl_cv_func_malloc_gnu to yes or no accordingly.
+AC_DEFUN([gl_CHECK_MALLOC_PTRDIFF],
+[
+  AC_CACHE_CHECK([whether malloc is ptrdiff_t safe],
+    [gl_cv_malloc_ptrdiff],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <stdint.h>
+          ]],
+          [[/* 64-bit ptrdiff_t is so wide that no practical platform
+               can exceed it.  */
+            #define WIDE_PTRDIFF (PTRDIFF_MAX >> 31 >> 31 != 0)
+
+            /* On rare machines where size_t fits in ptrdiff_t there
+               is no problem.  */
+            #define NARROW_SIZE (SIZE_MAX <= PTRDIFF_MAX)
+
+            /* glibc 2.30 and later malloc refuses to exceed ptrdiff_t
+               bounds even on 32-bit platforms.  We don't know which
+               non-glibc systems are safe.  */
+            #define KNOWN_SAFE (2 < __GLIBC__ + (30 <= __GLIBC_MINOR__))
+
+            #if WIDE_PTRDIFF || NARROW_SIZE || KNOWN_SAFE
+              return 0;
+            #else
+              #error "malloc might not be ptrdiff_t safe"
+              syntax error
+            #endif
+          ]])],
+       [gl_cv_malloc_ptrdiff=yes],
+       [gl_cv_malloc_ptrdiff=no])
+    ])
+])
+
+# gl_FUNC_MALLOC_POSIX
+# --------------------
+# Test whether 'malloc' is POSIX compliant (sets errno to ENOMEM when it
+# fails, and doesn't mess up with ptrdiff_t overflow), and replace
+# malloc if it is not.
+AC_DEFUN([gl_FUNC_MALLOC_POSIX],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_MALLOC_PTRDIFF])
+  AC_REQUIRE([gl_CHECK_MALLOC_POSIX])
+  if test "$gl_cv_func_malloc_posix" = yes; then
+    AC_DEFINE([HAVE_MALLOC_POSIX], [1],
+      [Define if malloc, realloc, and calloc set errno on allocation failure.])
+  else
+    REPLACE_MALLOC=1
+  fi
+])
+
+# Test whether malloc, realloc, calloc set errno to ENOMEM on failure.
+# Set gl_cv_func_malloc_posix to yes or no accordingly.
+AC_DEFUN([gl_CHECK_MALLOC_POSIX],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CACHE_CHECK([whether malloc, realloc, calloc set errno on failure],
+    [gl_cv_func_malloc_posix],
+    [
+      dnl It is too dangerous to try to allocate a large amount of memory:
+      dnl some systems go to their knees when you do that. So assume that
+      dnl all Unix implementations of the function set errno on failure,
+      dnl except on those platforms where we have seen 'test-malloc-gnu',
+      dnl 'test-realloc-gnu', 'test-calloc-gnu' fail.
+      case "$host_os" in
+        mingw*)
+          gl_cv_func_malloc_posix=no ;;
+        irix* | solaris*)
+          dnl On IRIX 6.5, the three functions return NULL with errno unset
+          dnl when the argument is larger than PTRDIFF_MAX.
+          dnl On Solaris 11.3, the three functions return NULL with errno set
+          dnl to EAGAIN, not ENOMEM, when the argument is larger than
+          dnl PTRDIFF_MAX.
+          dnl Here is a test program:
+m4_divert_push([KILL])
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#define ptrdiff_t long
+#ifndef PTRDIFF_MAX
+# define PTRDIFF_MAX ((ptrdiff_t) ((1UL << (8 * sizeof (ptrdiff_t) - 1)) - 1))
+#endif
+
+int main ()
+{
+  void *p;
+
+  fprintf (stderr, "PTRDIFF_MAX = %lu\n", (unsigned long) PTRDIFF_MAX);
+
+  errno = 0;
+  p = malloc ((unsigned long) PTRDIFF_MAX + 1);
+  fprintf (stderr, "p=%p errno=%d\n", p, errno);
+
+  errno = 0;
+  p = calloc (PTRDIFF_MAX / 2 + 1, 2);
+  fprintf (stderr, "p=%p errno=%d\n", p, errno);
+
+  errno = 0;
+  p = realloc (NULL, (unsigned long) PTRDIFF_MAX + 1);
+  fprintf (stderr, "p=%p errno=%d\n", p, errno);
+
+  return 0;
+}
+m4_divert_pop([KILL])
+          gl_cv_func_malloc_posix=no ;;
+        *)
+          gl_cv_func_malloc_posix=yes ;;
+      esac
+    ])
+])
diff --git a/src/grep/m4/malloca.m4 b/src/grep/m4/malloca.m4
new file mode 100644
index 0000000..06ed2c6
--- /dev/null
+++ b/src/grep/m4/malloca.m4
@@ -0,0 +1,14 @@
+# malloca.m4 serial 2
+dnl Copyright (C) 2003-2004, 2006-2007, 2009-2021 Free Software Foundation,
+dnl Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_MALLOCA],
+[
+  dnl Use the autoconf tests for alloca(), but not the AC_SUBSTed variables
+  dnl @ALLOCA@ and @LTALLOCA@.
+  dnl gl_FUNC_ALLOCA   dnl Already brought in by the module dependencies.
+  AC_REQUIRE([gl_EEMALLOC])
+])
diff --git a/src/grep/m4/manywarnings.m4 b/src/grep/m4/manywarnings.m4
new file mode 100644
index 0000000..872ea58
--- /dev/null
+++ b/src/grep/m4/manywarnings.m4
@@ -0,0 +1,209 @@
+# manywarnings.m4 serial 23
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Simon Josefsson
+
+# gl_MANYWARN_COMPLEMENT(OUTVAR, LISTVAR, REMOVEVAR)
+# --------------------------------------------------
+# Copy LISTVAR to OUTVAR except for the entries in REMOVEVAR.
+# Elements separated by whitespace.  In set logic terms, the function
+# does OUTVAR = LISTVAR \ REMOVEVAR.
+AC_DEFUN([gl_MANYWARN_COMPLEMENT],
+[
+  gl_warn_set=
+  set x $2; shift
+  for gl_warn_item
+  do
+    case " $3 " in
+      *" $gl_warn_item "*)
+        ;;
+      *)
+        gl_AS_VAR_APPEND([gl_warn_set], [" $gl_warn_item"])
+        ;;
+    esac
+  done
+  $1=$gl_warn_set
+])
+
+# gl_MANYWARN_ALL_GCC(VARIABLE)
+# -----------------------------
+# Add all documented GCC warning parameters to variable VARIABLE.
+# Note that you need to test them using gl_WARN_ADD if you want to
+# make sure your gcc understands it.
+#
+# The effects of this macro depend on the current language (_AC_LANG).
+AC_DEFUN([gl_MANYWARN_ALL_GCC],
+[_AC_LANG_DISPATCH([$0], _AC_LANG, $@)])
+
+# Specialization for _AC_LANG = C.
+AC_DEFUN([gl_MANYWARN_ALL_GCC(C)],
+[
+  AC_LANG_PUSH([C])
+
+  dnl First, check for some issues that only occur when combining multiple
+  dnl gcc warning categories.
+  AC_REQUIRE([AC_PROG_CC])
+  if test -n "$GCC"; then
+
+    dnl Check if -Wextra -Werror -Wno-missing-field-initializers is supported
+    dnl with the current $CC $CFLAGS $CPPFLAGS.
+    AC_CACHE_CHECK([whether -Wno-missing-field-initializers is supported],
+      [gl_cv_cc_nomfi_supported],
+      [gl_save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -Wextra -Werror -Wno-missing-field-initializers"
+       AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM([[]], [[]])],
+         [gl_cv_cc_nomfi_supported=yes],
+         [gl_cv_cc_nomfi_supported=no])
+       CFLAGS="$gl_save_CFLAGS"
+      ])
+
+    if test "$gl_cv_cc_nomfi_supported" = yes; then
+      dnl Now check whether -Wno-missing-field-initializers is needed
+      dnl for the { 0, } construct.
+      AC_CACHE_CHECK([whether -Wno-missing-field-initializers is needed],
+        [gl_cv_cc_nomfi_needed],
+        [gl_save_CFLAGS="$CFLAGS"
+         CFLAGS="$CFLAGS -Wextra -Werror"
+         AC_COMPILE_IFELSE(
+           [AC_LANG_PROGRAM(
+              [[int f (void)
+                {
+                  typedef struct { int a; int b; } s_t;
+                  s_t s1 = { 0, };
+                  return s1.b;
+                }
+              ]],
+              [[]])],
+           [gl_cv_cc_nomfi_needed=no],
+           [gl_cv_cc_nomfi_needed=yes])
+         CFLAGS="$gl_save_CFLAGS"
+        ])
+    fi
+
+    dnl Next, check if -Werror -Wuninitialized is useful with the
+    dnl user's choice of $CFLAGS; some versions of gcc warn that it
+    dnl has no effect if -O is not also used
+    AC_CACHE_CHECK([whether -Wuninitialized is supported],
+      [gl_cv_cc_uninitialized_supported],
+      [gl_save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -Werror -Wuninitialized"
+       AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM([[]], [[]])],
+         [gl_cv_cc_uninitialized_supported=yes],
+         [gl_cv_cc_uninitialized_supported=no])
+       CFLAGS="$gl_save_CFLAGS"
+      ])
+
+  fi
+
+  # List all gcc warning categories.
+  # To compare this list to your installed GCC's, run this Bash command:
+  #
+  # comm -3 \
+  #  <((sed -n 's/^  *\(-[^ 0-9][^ ]*\).*/\1/p' manywarnings.m4; \
+  #     awk '/^[^#]/ {print $1}' ../build-aux/gcc-warning.spec) | sort) \
+  #  <(LC_ALL=C gcc --help=warnings | sed -n 's/^  \(-[^ ]*\) .*/\1/p' | sort)
+
+  $1=
+  for gl_manywarn_item in -fanalyzer -fno-common \
+    -Wall \
+    -Warith-conversion \
+    -Wbad-function-cast \
+    -Wcast-align=strict \
+    -Wdate-time \
+    -Wdisabled-optimization \
+    -Wdouble-promotion \
+    -Wduplicated-branches \
+    -Wduplicated-cond \
+    -Wextra \
+    -Wformat-signedness \
+    -Winit-self \
+    -Winline \
+    -Winvalid-pch \
+    -Wlogical-op \
+    -Wmissing-declarations \
+    -Wmissing-include-dirs \
+    -Wmissing-prototypes \
+    -Wnested-externs \
+    -Wnull-dereference \
+    -Wold-style-definition \
+    -Wopenmp-simd \
+    -Woverlength-strings \
+    -Wpacked \
+    -Wpointer-arith \
+    -Wshadow \
+    -Wstack-protector \
+    -Wstrict-overflow \
+    -Wstrict-prototypes \
+    -Wsuggest-attribute=cold \
+    -Wsuggest-attribute=const \
+    -Wsuggest-attribute=format \
+    -Wsuggest-attribute=malloc \
+    -Wsuggest-attribute=noreturn \
+    -Wsuggest-attribute=pure \
+    -Wsuggest-final-methods \
+    -Wsuggest-final-types \
+    -Wsync-nand \
+    -Wsystem-headers \
+    -Wtrampolines \
+    -Wuninitialized \
+    -Wunknown-pragmas \
+    -Wunsafe-loop-optimizations \
+    -Wunused-macros \
+    -Wvariadic-macros \
+    -Wvector-operation-performance \
+    -Wvla \
+    -Wwrite-strings \
+    \
+    ; do
+    gl_AS_VAR_APPEND([$1], [" $gl_manywarn_item"])
+  done
+
+  # gcc --help=warnings outputs an unusual form for these options; list
+  # them here so that the above 'comm' command doesn't report a false match.
+  gl_AS_VAR_APPEND([$1], [' -Warray-bounds=2'])
+  gl_AS_VAR_APPEND([$1], [' -Wattribute-alias=2'])
+  gl_AS_VAR_APPEND([$1], [' -Wformat-overflow=2'])
+  gl_AS_VAR_APPEND([$1], [' -Wformat=2'])
+  gl_AS_VAR_APPEND([$1], [' -Wformat-truncation=2'])
+  gl_AS_VAR_APPEND([$1], [' -Wimplicit-fallthrough=5'])
+  gl_AS_VAR_APPEND([$1], [' -Wshift-overflow=2'])
+  gl_AS_VAR_APPEND([$1], [' -Wunused-const-variable=2'])
+  gl_AS_VAR_APPEND([$1], [' -Wvla-larger-than=4031'])
+
+  # These are needed for older GCC versions.
+  if test -n "$GCC"; then
+    case `($CC --version) 2>/dev/null` in
+      'gcc (GCC) '[[0-3]].* | \
+      'gcc (GCC) '4.[[0-7]].*)
+        gl_AS_VAR_APPEND([$1], [' -fdiagnostics-show-option'])
+        gl_AS_VAR_APPEND([$1], [' -funit-at-a-time'])
+          ;;
+    esac
+  fi
+
+  # Disable specific options as needed.
+  if test "$gl_cv_cc_nomfi_needed" = yes; then
+    gl_AS_VAR_APPEND([$1], [' -Wno-missing-field-initializers'])
+  fi
+
+  if test "$gl_cv_cc_uninitialized_supported" = no; then
+    gl_AS_VAR_APPEND([$1], [' -Wno-uninitialized'])
+  fi
+
+  # This warning have too many false alarms in GCC 11.2.1.
+  # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101713
+  gl_AS_VAR_APPEND([$1], [' -Wno-analyzer-malloc-leak'])
+
+  AC_LANG_POP([C])
+])
+
+# Specialization for _AC_LANG = C++.
+AC_DEFUN([gl_MANYWARN_ALL_GCC(C++)],
+[
+  gl_MANYWARN_ALL_GCC_CXX_IMPL([$1])
+])
diff --git a/src/grep/m4/mbchar.m4 b/src/grep/m4/mbchar.m4
new file mode 100644
index 0000000..b6842bb
--- /dev/null
+++ b/src/grep/m4/mbchar.m4
@@ -0,0 +1,13 @@
+# mbchar.m4 serial 9
+dnl Copyright (C) 2005-2007, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl autoconf tests required for use of mbchar.m4
+dnl From Bruno Haible.
+
+AC_DEFUN([gl_MBCHAR],
+[
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+])
diff --git a/src/grep/m4/mbiter.m4 b/src/grep/m4/mbiter.m4
new file mode 100644
index 0000000..0d57379
--- /dev/null
+++ b/src/grep/m4/mbiter.m4
@@ -0,0 +1,14 @@
+# mbiter.m4 serial 7
+dnl Copyright (C) 2005, 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl autoconf tests required for use of mbiter.h
+dnl From Bruno Haible.
+
+AC_DEFUN([gl_MBITER],
+[
+  AC_REQUIRE([AC_TYPE_MBSTATE_T])
+  :
+])
diff --git a/src/grep/m4/mbrlen.m4 b/src/grep/m4/mbrlen.m4
new file mode 100644
index 0000000..6abf817
--- /dev/null
+++ b/src/grep/m4/mbrlen.m4
@@ -0,0 +1,238 @@
+# mbrlen.m4 serial 11  -*- coding: utf-8 -*-
+dnl Copyright (C) 2008, 2010-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_MBRLEN],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+
+  AC_REQUIRE([AC_TYPE_MBSTATE_T])
+  AC_REQUIRE([gl_FUNC_MBRTOWC])
+  AC_CHECK_FUNCS_ONCE([mbrlen])
+  if test $ac_cv_func_mbrlen = no; then
+    HAVE_MBRLEN=0
+    AC_CHECK_DECLS([mbrlen],,, [[
+      #include <wchar.h>
+    ]])
+    if test $ac_cv_have_decl_mbrlen = yes; then
+      dnl On Minix 3.1.8, the system's <wchar.h> declares mbrlen() although
+      dnl it does not have the function. Avoid a collision with gnulib's
+      dnl replacement.
+      REPLACE_MBRLEN=1
+    fi
+  else
+    dnl Most bugs affecting the system's mbrtowc function also affect the
+    dnl mbrlen function. So override mbrlen whenever mbrtowc is overridden.
+    dnl We could also run the individual tests below; the results would be
+    dnl the same.
+    if test $REPLACE_MBRTOWC = 1; then
+      REPLACE_MBRLEN=1
+    fi
+  fi
+])
+
+dnl Test whether mbrlen puts the state into non-initial state when parsing an
+dnl incomplete multibyte character.
+dnl Result is gl_cv_func_mbrlen_incomplete_state.
+
+AC_DEFUN([gl_MBRLEN_INCOMPLETE_STATE],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gt_LOCALE_JA])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether mbrlen handles incomplete characters],
+    [gl_cv_func_mbrlen_incomplete_state],
+    [
+      dnl Initial guess, used when cross-compiling or when no suitable locale
+      dnl is present.
+changequote(,)dnl
+      case "$host_os" in
+                     # Guess no on AIX and OSF/1.
+        aix* | osf*) gl_cv_func_mbrlen_incomplete_state="guessing no" ;;
+                     # Guess yes otherwise.
+        *)           gl_cv_func_mbrlen_incomplete_state="guessing yes" ;;
+      esac
+changequote([,])dnl
+      if test $LOCALE_JA != none; then
+        AC_RUN_IFELSE(
+          [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      const char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
+        if (mbsinit (&state))
+          return 1;
+    }
+  return 0;
+}]])],
+          [gl_cv_func_mbrlen_incomplete_state=yes],
+          [gl_cv_func_mbrlen_incomplete_state=no],
+          [])
+      fi
+    ])
+])
+
+dnl Test whether mbrlen, when parsing the end of a multibyte character,
+dnl correctly returns the number of bytes that were needed to complete the
+dnl character (not the total number of bytes of the multibyte character).
+dnl Result is gl_cv_func_mbrlen_retval.
+
+AC_DEFUN([gl_MBRLEN_RETVAL],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gt_LOCALE_FR_UTF8])
+  AC_REQUIRE([gt_LOCALE_JA])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether mbrlen has a correct return value],
+    [gl_cv_func_mbrlen_retval],
+    [
+      dnl Initial guess, used when cross-compiling or when no suitable locale
+      dnl is present.
+changequote(,)dnl
+      case "$host_os" in
+                          # Guess no on HP-UX and Solaris.
+        hpux* | solaris*) gl_cv_func_mbrlen_retval="guessing no" ;;
+                          # Guess yes otherwise.
+        *)                gl_cv_func_mbrlen_retval="guessing yes" ;;
+      esac
+changequote([,])dnl
+      if test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none; then
+        AC_RUN_IFELSE(
+          [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  int result = 0;
+  /* This fails on Solaris.  */
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      char input[] = "B\303\274\303\237er"; /* "Büßer" */
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
+        {
+          input[1] = '\0';
+          if (mbrlen (input + 2, 5, &state) != 1)
+            result |= 1;
+        }
+    }
+  /* This fails on HP-UX 11.11.  */
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
+        {
+          input[1] = '\0';
+          if (mbrlen (input + 2, 5, &state) != 2)
+            result |= 2;
+        }
+    }
+  return result;
+}]])],
+          [gl_cv_func_mbrlen_retval=yes],
+          [gl_cv_func_mbrlen_retval=no],
+          [])
+      fi
+    ])
+])
+
+dnl Test whether mbrlen, when parsing a NUL character, correctly returns 0.
+dnl Result is gl_cv_func_mbrlen_nul_retval.
+
+AC_DEFUN([gl_MBRLEN_NUL_RETVAL],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gt_LOCALE_ZH_CN])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether mbrlen returns 0 when parsing a NUL character],
+    [gl_cv_func_mbrlen_nul_retval],
+    [
+      dnl Initial guess, used when cross-compiling or when no suitable locale
+      dnl is present.
+changequote(,)dnl
+      case "$host_os" in
+                    # Guess no on Solaris 9.
+        solaris2.9) gl_cv_func_mbrlen_nul_retval="guessing no" ;;
+                    # Guess yes otherwise.
+        *)          gl_cv_func_mbrlen_nul_retval="guessing yes" ;;
+      esac
+changequote([,])dnl
+      if test $LOCALE_ZH_CN != none; then
+        AC_RUN_IFELSE(
+          [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  /* This crashes on Solaris 9 inside __mbrtowc_dense_gb18030.  */
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrlen ("", 1, &state) != 0)
+        return 1;
+    }
+  return 0;
+}]])],
+          [gl_cv_func_mbrlen_nul_retval=yes],
+          [gl_cv_func_mbrlen_nul_retval=no],
+          [])
+      fi
+    ])
+])
+
+dnl Test whether mbrlen returns the correct value on empty input.
+
+AC_DEFUN([gl_MBRLEN_EMPTY_INPUT],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether mbrlen works on empty input],
+    [gl_cv_func_mbrlen_empty_input],
+    [
+      dnl Initial guess, used when cross-compiling or when no suitable locale
+      dnl is present.
+changequote(,)dnl
+      case "$host_os" in
+                              # Guess no on AIX and glibc systems.
+        aix* | *-gnu* | gnu*) gl_cv_func_mbrlen_empty_input="guessing no" ;;
+        *)                    gl_cv_func_mbrlen_empty_input="guessing yes" ;;
+      esac
+changequote([,])dnl
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+           #include <wchar.h>
+           static mbstate_t mbs;
+           int
+           main (void)
+           {
+             return mbrlen ("", 0, &mbs) != (size_t) -2;
+           }]])],
+        [gl_cv_func_mbrlen_empty_input=yes],
+        [gl_cv_func_mbrlen_empty_input=no],
+        [:])
+    ])
+])
+
+# Prerequisites of lib/mbrlen.c.
+AC_DEFUN([gl_PREREQ_MBRLEN], [
+  :
+])
diff --git a/src/grep/m4/mbrtowc.m4 b/src/grep/m4/mbrtowc.m4
new file mode 100644
index 0000000..1d4e73d
--- /dev/null
+++ b/src/grep/m4/mbrtowc.m4
@@ -0,0 +1,790 @@
+# mbrtowc.m4 serial 38  -*- coding: utf-8 -*-
+dnl Copyright (C) 2001-2002, 2004-2005, 2008-2021 Free Software Foundation,
+dnl Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_MBRTOWC],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+  AC_REQUIRE([gl_PTHREADLIB])
+  AC_CHECK_HEADERS_ONCE([threads.h])
+
+  AC_REQUIRE([AC_TYPE_MBSTATE_T])
+  gl_MBSTATE_T_BROKEN
+
+  AC_CHECK_FUNCS_ONCE([mbrtowc])
+  if test $ac_cv_func_mbrtowc = no; then
+    HAVE_MBRTOWC=0
+    AC_CHECK_DECLS([mbrtowc],,, [[
+      #include <wchar.h>
+    ]])
+    if test $ac_cv_have_decl_mbrtowc = yes; then
+      dnl On Minix 3.1.8, the system's <wchar.h> declares mbrtowc() although
+      dnl it does not have the function. Avoid a collision with gnulib's
+      dnl replacement.
+      REPLACE_MBRTOWC=1
+    fi
+  else
+    if test $REPLACE_MBSTATE_T = 1; then
+      REPLACE_MBRTOWC=1
+    else
+      gl_MBRTOWC_NULL_ARG1
+      gl_MBRTOWC_NULL_ARG2
+      gl_MBRTOWC_RETVAL
+      gl_MBRTOWC_NUL_RETVAL
+      gl_MBRTOWC_STORES_INCOMPLETE
+      gl_MBRTOWC_EMPTY_INPUT
+      gl_MBRTOWC_C_LOCALE
+      case "$gl_cv_func_mbrtowc_null_arg1" in
+        *yes) ;;
+        *) AC_DEFINE([MBRTOWC_NULL_ARG1_BUG], [1],
+             [Define if the mbrtowc function has the NULL pwc argument bug.])
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_null_arg2" in
+        *yes) ;;
+        *) AC_DEFINE([MBRTOWC_NULL_ARG2_BUG], [1],
+             [Define if the mbrtowc function has the NULL string argument bug.])
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_retval" in
+        *yes) ;;
+        *) AC_DEFINE([MBRTOWC_RETVAL_BUG], [1],
+             [Define if the mbrtowc function returns a wrong return value.])
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_nul_retval" in
+        *yes) ;;
+        *) AC_DEFINE([MBRTOWC_NUL_RETVAL_BUG], [1],
+             [Define if the mbrtowc function does not return 0 for a NUL character.])
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_stores_incomplete" in
+        *no) ;;
+        *) AC_DEFINE([MBRTOWC_STORES_INCOMPLETE_BUG], [1],
+             [Define if the mbrtowc function stores a wide character when reporting incomplete input.])
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_empty_input" in
+        *yes) ;;
+        *) AC_DEFINE([MBRTOWC_EMPTY_INPUT_BUG], [1],
+             [Define if the mbrtowc function does not return (size_t) -2
+              for empty input.])
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+      case "$gl_cv_func_mbrtowc_C_locale_sans_EILSEQ" in
+        *yes) ;;
+        *) AC_DEFINE([MBRTOWC_IN_C_LOCALE_MAYBE_EILSEQ], [1],
+             [Define if the mbrtowc function may signal encoding errors in the C locale.])
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
+    fi
+  fi
+  if test $REPLACE_MBSTATE_T = 1; then
+    case "$host_os" in
+      mingw*) LIB_MBRTOWC= ;;
+      *)
+        gl_WEAK_SYMBOLS
+        case "$gl_cv_have_weak" in
+          *yes) LIB_MBRTOWC= ;;
+          *)    LIB_MBRTOWC="$LIBPTHREAD" ;;
+        esac
+        ;;
+    esac
+  else
+    LIB_MBRTOWC=
+  fi
+  dnl LIB_MBRTOWC is expected to be '-pthread' or '-lpthread' on AIX
+  dnl with gcc or xlc, and empty otherwise.
+  AC_SUBST([LIB_MBRTOWC])
+])
+
+dnl Test whether mbsinit() and mbrtowc() need to be overridden in a way that
+dnl redefines the semantics of the given mbstate_t type.
+dnl Result is REPLACE_MBSTATE_T.
+dnl When this is set to 1, we replace both mbsinit() and mbrtowc(), in order to
+dnl avoid inconsistencies.
+
+AC_DEFUN([gl_MBSTATE_T_BROKEN],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+
+  AC_REQUIRE([AC_TYPE_MBSTATE_T])
+  AC_CHECK_FUNCS_ONCE([mbsinit])
+  AC_CHECK_FUNCS_ONCE([mbrtowc])
+  dnl On native Windows, we know exactly how mbsinit() behaves and don't need
+  dnl to override it, even if - like on MSVC - mbsinit() is only defined as
+  dnl an inline function, not as a global function.
+  if case "$host_os" in
+       mingw*) true ;;
+       *) test $ac_cv_func_mbsinit = yes ;;
+     esac \
+    && test $ac_cv_func_mbrtowc = yes; then
+    gl_MBRTOWC_INCOMPLETE_STATE
+    gl_MBRTOWC_SANITYCHECK
+    REPLACE_MBSTATE_T=0
+    case "$gl_cv_func_mbrtowc_incomplete_state" in
+      *yes) ;;
+      *) REPLACE_MBSTATE_T=1 ;;
+    esac
+    case "$gl_cv_func_mbrtowc_sanitycheck" in
+      *yes) ;;
+      *) REPLACE_MBSTATE_T=1 ;;
+    esac
+  else
+    REPLACE_MBSTATE_T=1
+  fi
+])
+
+dnl Test whether mbrtowc puts the state into non-initial state when parsing an
+dnl incomplete multibyte character.
+dnl Result is gl_cv_func_mbrtowc_incomplete_state.
+
+AC_DEFUN([gl_MBRTOWC_INCOMPLETE_STATE],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gt_LOCALE_JA])
+  AC_REQUIRE([gt_LOCALE_FR_UTF8])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether mbrtowc handles incomplete characters],
+    [gl_cv_func_mbrtowc_incomplete_state],
+    [
+      dnl Initial guess, used when cross-compiling or when no suitable locale
+      dnl is present.
+changequote(,)dnl
+      case "$host_os" in
+                     # Guess no on AIX and OSF/1.
+        aix* | osf*) gl_cv_func_mbrtowc_incomplete_state="guessing no" ;;
+                     # Guess yes otherwise.
+        *)           gl_cv_func_mbrtowc_incomplete_state="guessing yes" ;;
+      esac
+changequote([,])dnl
+      if test $LOCALE_JA != none; then
+        AC_RUN_IFELSE(
+          [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      const char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        if (mbsinit (&state))
+          return 2;
+    }
+  return 0;
+}]])],
+          [gl_cv_func_mbrtowc_incomplete_state=yes],
+          [gl_cv_func_mbrtowc_incomplete_state=no],
+          [:])
+      else
+        if test $LOCALE_FR_UTF8 != none; then
+          AC_RUN_IFELSE(
+            [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      const char input[] = "B\303\274\303\237er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        if (mbsinit (&state))
+          return 2;
+    }
+  return 0;
+}]])],
+          [gl_cv_func_mbrtowc_incomplete_state=yes],
+          [gl_cv_func_mbrtowc_incomplete_state=no],
+          [:])
+        fi
+      fi
+    ])
+])
+
+dnl Test whether mbrtowc works not worse than mbtowc.
+dnl Result is gl_cv_func_mbrtowc_sanitycheck.
+
+AC_DEFUN([gl_MBRTOWC_SANITYCHECK],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gt_LOCALE_ZH_CN])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether mbrtowc works as well as mbtowc],
+    [gl_cv_func_mbrtowc_sanitycheck],
+    [
+      dnl Initial guess, used when cross-compiling or when no suitable locale
+      dnl is present.
+changequote(,)dnl
+      case "$host_os" in
+                    # Guess no on Solaris 8.
+        solaris2.8) gl_cv_func_mbrtowc_sanitycheck="guessing no" ;;
+                    # Guess yes otherwise.
+        *)          gl_cv_func_mbrtowc_sanitycheck="guessing yes" ;;
+      esac
+changequote([,])dnl
+      if test $LOCALE_ZH_CN != none; then
+        AC_RUN_IFELSE(
+          [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  /* This fails on Solaris 8:
+     mbrtowc returns 2, and sets wc to 0x00F0.
+     mbtowc returns 4 (correct) and sets wc to 0x5EDC.  */
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      char input[] = "B\250\271\201\060\211\070er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 3, 6, &state) != 4
+          && mbtowc (&wc, input + 3, 6) == 4)
+        return 2;
+    }
+  return 0;
+}]])],
+          [gl_cv_func_mbrtowc_sanitycheck=yes],
+          [gl_cv_func_mbrtowc_sanitycheck=no],
+          [:])
+      fi
+    ])
+])
+
+dnl Test whether mbrtowc supports a NULL pwc argument correctly.
+dnl Result is gl_cv_func_mbrtowc_null_arg1.
+
+AC_DEFUN([gl_MBRTOWC_NULL_ARG1],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gt_LOCALE_FR_UTF8])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether mbrtowc handles a NULL pwc argument],
+    [gl_cv_func_mbrtowc_null_arg1],
+    [
+      dnl Initial guess, used when cross-compiling or when no suitable locale
+      dnl is present.
+changequote(,)dnl
+      case "$host_os" in
+                  # Guess no on Solaris.
+        solaris*) gl_cv_func_mbrtowc_null_arg1="guessing no" ;;
+                  # Guess yes otherwise.
+        *)        gl_cv_func_mbrtowc_null_arg1="guessing yes" ;;
+      esac
+changequote([,])dnl
+      if test $LOCALE_FR_UTF8 != none; then
+        AC_RUN_IFELSE(
+          [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  int result = 0;
+
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      char input[] = "\303\237er";
+      mbstate_t state;
+      wchar_t wc;
+      size_t ret;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      wc = (wchar_t) 0xBADFACE;
+      ret = mbrtowc (&wc, input, 5, &state);
+      if (ret != 2)
+        result |= 1;
+      if (!mbsinit (&state))
+        result |= 2;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      ret = mbrtowc (NULL, input, 5, &state);
+      if (ret != 2) /* Solaris 7 fails here: ret is -1.  */
+        result |= 4;
+      if (!mbsinit (&state))
+        result |= 8;
+    }
+  return result;
+}]])],
+          [gl_cv_func_mbrtowc_null_arg1=yes],
+          [gl_cv_func_mbrtowc_null_arg1=no],
+          [:])
+      fi
+    ])
+])
+
+dnl Test whether mbrtowc supports a NULL string argument correctly.
+dnl Result is gl_cv_func_mbrtowc_null_arg2.
+
+AC_DEFUN([gl_MBRTOWC_NULL_ARG2],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gt_LOCALE_FR_UTF8])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether mbrtowc handles a NULL string argument],
+    [gl_cv_func_mbrtowc_null_arg2],
+    [
+      dnl Initial guess, used when cross-compiling or when no suitable locale
+      dnl is present.
+changequote(,)dnl
+      case "$host_os" in
+              # Guess no on OSF/1.
+        osf*) gl_cv_func_mbrtowc_null_arg2="guessing no" ;;
+              # Guess yes otherwise.
+        *)    gl_cv_func_mbrtowc_null_arg2="guessing yes" ;;
+      esac
+changequote([,])dnl
+      if test $LOCALE_FR_UTF8 != none; then
+        AC_RUN_IFELSE(
+          [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      mbstate_t state;
+      wchar_t wc;
+      int ret;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      wc = (wchar_t) 0xBADFACE;
+      mbrtowc (&wc, NULL, 5, &state);
+      /* Check that wc was not modified.  */
+      if (wc != (wchar_t) 0xBADFACE)
+        return 2;
+    }
+  return 0;
+}]])],
+          [gl_cv_func_mbrtowc_null_arg2=yes],
+          [gl_cv_func_mbrtowc_null_arg2=no],
+          [:])
+      fi
+    ])
+])
+
+dnl Test whether mbrtowc, when parsing the end of a multibyte character,
+dnl correctly returns the number of bytes that were needed to complete the
+dnl character (not the total number of bytes of the multibyte character).
+dnl Result is gl_cv_func_mbrtowc_retval.
+
+AC_DEFUN([gl_MBRTOWC_RETVAL],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gt_LOCALE_FR_UTF8])
+  AC_REQUIRE([gt_LOCALE_JA])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CACHE_CHECK([whether mbrtowc has a correct return value],
+    [gl_cv_func_mbrtowc_retval],
+    [
+      dnl Initial guess, used when cross-compiling or when no suitable locale
+      dnl is present.
+changequote(,)dnl
+      case "$host_os" in
+                                   # Guess no on HP-UX, Solaris, native Windows.
+        hpux* | solaris* | mingw*) gl_cv_func_mbrtowc_retval="guessing no" ;;
+                                   # Guess yes otherwise.
+        *)                         gl_cv_func_mbrtowc_retval="guessing yes" ;;
+      esac
+changequote([,])dnl
+      if test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none \
+         || { case "$host_os" in mingw*) true;; *) false;; esac; }; then
+        AC_RUN_IFELSE(
+          [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  int result = 0;
+  int found_some_locale = 0;
+  /* This fails on Solaris.  */
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      char input[] = "B\303\274\303\237er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        {
+          input[1] = '\0';
+          if (mbrtowc (&wc, input + 2, 5, &state) != 1)
+            result |= 1;
+        }
+      found_some_locale = 1;
+    }
+  /* This fails on HP-UX 11.11.  */
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        {
+          input[1] = '\0';
+          if (mbrtowc (&wc, input + 2, 5, &state) != 2)
+            result |= 2;
+        }
+      found_some_locale = 1;
+    }
+  /* This fails on native Windows.  */
+  if (setlocale (LC_ALL, "Japanese_Japan.932") != NULL)
+    {
+      char input[] = "<\223\372\226\173\214\352>"; /* "<日本語>" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 3, 1, &state) == (size_t)(-2))
+        {
+          input[3] = '\0';
+          if (mbrtowc (&wc, input + 4, 4, &state) != 1)
+            result |= 4;
+        }
+      found_some_locale = 1;
+    }
+  if (setlocale (LC_ALL, "Chinese_Taiwan.950") != NULL)
+    {
+      char input[] = "<\244\351\245\273\273\171>"; /* "<日本語>" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 3, 1, &state) == (size_t)(-2))
+        {
+          input[3] = '\0';
+          if (mbrtowc (&wc, input + 4, 4, &state) != 1)
+            result |= 8;
+        }
+      found_some_locale = 1;
+    }
+  if (setlocale (LC_ALL, "Chinese_China.936") != NULL)
+    {
+      char input[] = "<\310\325\261\276\325\132>"; /* "<日本語>" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 3, 1, &state) == (size_t)(-2))
+        {
+          input[3] = '\0';
+          if (mbrtowc (&wc, input + 4, 4, &state) != 1)
+            result |= 16;
+        }
+      found_some_locale = 1;
+    }
+  return (found_some_locale ? result : 77);
+}]])],
+          [gl_cv_func_mbrtowc_retval=yes],
+          [if test $? != 77; then
+             gl_cv_func_mbrtowc_retval=no
+           fi
+          ],
+          [:])
+      fi
+    ])
+])
+
+dnl Test whether mbrtowc, when parsing a NUL character, correctly returns 0.
+dnl Result is gl_cv_func_mbrtowc_nul_retval.
+
+AC_DEFUN([gl_MBRTOWC_NUL_RETVAL],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gt_LOCALE_ZH_CN])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether mbrtowc returns 0 when parsing a NUL character],
+    [gl_cv_func_mbrtowc_nul_retval],
+    [
+      dnl Initial guess, used when cross-compiling or when no suitable locale
+      dnl is present.
+changequote(,)dnl
+      case "$host_os" in
+                       # Guess no on Solaris 8 and 9.
+        solaris2.[89]) gl_cv_func_mbrtowc_nul_retval="guessing no" ;;
+                       # Guess yes otherwise.
+        *)             gl_cv_func_mbrtowc_nul_retval="guessing yes" ;;
+      esac
+changequote([,])dnl
+      if test $LOCALE_ZH_CN != none; then
+        AC_RUN_IFELSE(
+          [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  /* This fails on Solaris 8 and 9.  */
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "", 1, &state) != 0)
+        return 2;
+    }
+  return 0;
+}]])],
+          [gl_cv_func_mbrtowc_nul_retval=yes],
+          [gl_cv_func_mbrtowc_nul_retval=no],
+          [:])
+      fi
+    ])
+])
+
+dnl Test whether mbrtowc stores a wide character when reporting incomplete
+dnl input.
+
+AC_DEFUN([gl_MBRTOWC_STORES_INCOMPLETE],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether mbrtowc stores incomplete characters],
+    [gl_cv_func_mbrtowc_stores_incomplete],
+    [
+     dnl Initial guess, used when cross-compiling or when no suitable locale
+     dnl is present.
+changequote(,)dnl
+     case "$host_os" in
+               # Guess yes on native Windows.
+       mingw*) gl_cv_func_mbrtowc_stores_incomplete="guessing yes" ;;
+       *)      gl_cv_func_mbrtowc_stores_incomplete="guessing no" ;;
+     esac
+changequote([,])dnl
+     case "$host_os" in
+       mingw*)
+         AC_RUN_IFELSE(
+           [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  int result = 0;
+  if (setlocale (LC_ALL, "French_France.65001") != NULL)
+    {
+      wchar_t wc = (wchar_t) 0xBADFACE;
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "\303", 1, &state) == (size_t)(-2)
+          && wc != (wchar_t) 0xBADFACE)
+        result |= 1;
+    }
+  if (setlocale (LC_ALL, "Japanese_Japan.932") != NULL)
+    {
+      wchar_t wc = (wchar_t) 0xBADFACE;
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "\226", 1, &state) == (size_t)(-2)
+          && wc != (wchar_t) 0xBADFACE)
+        result |= 2;
+    }
+  if (setlocale (LC_ALL, "Chinese_Taiwan.950") != NULL)
+    {
+      wchar_t wc = (wchar_t) 0xBADFACE;
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "\245", 1, &state) == (size_t)(-2)
+          && wc != (wchar_t) 0xBADFACE)
+        result |= 4;
+    }
+  if (setlocale (LC_ALL, "Chinese_China.936") != NULL)
+    {
+      wchar_t wc = (wchar_t) 0xBADFACE;
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "\261", 1, &state) == (size_t)(-2)
+          && wc != (wchar_t) 0xBADFACE)
+        result |= 8;
+    }
+  return result;
+}]])],
+           [gl_cv_func_mbrtowc_stores_incomplete=no],
+           [gl_cv_func_mbrtowc_stores_incomplete=yes],
+           [:])
+         ;;
+       *)
+         AC_REQUIRE([gt_LOCALE_FR_UTF8])
+         if test $LOCALE_FR_UTF8 != none; then
+           AC_RUN_IFELSE(
+             [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      wchar_t wc = (wchar_t) 0xBADFACE;
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, "\303", 1, &state) == (size_t)(-2)
+          && wc != (wchar_t) 0xBADFACE)
+        return 1;
+    }
+  return 0;
+}]])],
+             [gl_cv_func_mbrtowc_stores_incomplete=no],
+             [gl_cv_func_mbrtowc_stores_incomplete=yes],
+             [:])
+         fi
+         ;;
+     esac
+    ])
+])
+
+dnl Test whether mbrtowc returns the correct value on empty input.
+
+AC_DEFUN([gl_MBRTOWC_EMPTY_INPUT],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether mbrtowc works on empty input],
+    [gl_cv_func_mbrtowc_empty_input],
+    [
+      dnl Initial guess, used when cross-compiling or when no suitable locale
+      dnl is present.
+changequote(,)dnl
+      case "$host_os" in
+                              # Guess no on AIX and glibc systems.
+        aix* | *-gnu* | gnu*) gl_cv_func_mbrtowc_empty_input="guessing no" ;;
+                              # Guess yes on native Windows.
+        mingw*)               gl_cv_func_mbrtowc_empty_input="guessing yes" ;;
+        *)                    gl_cv_func_mbrtowc_empty_input="guessing yes" ;;
+      esac
+changequote([,])dnl
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+           #include <wchar.h>
+           static wchar_t wc;
+           static mbstate_t mbs;
+           int
+           main (void)
+           {
+             return mbrtowc (&wc, "", 0, &mbs) != (size_t) -2;
+           }]])],
+        [gl_cv_func_mbrtowc_empty_input=yes],
+        [gl_cv_func_mbrtowc_empty_input=no],
+        [:])
+    ])
+])
+
+dnl Test whether mbrtowc reports encoding errors in the C locale.
+dnl Although POSIX was never intended to allow this, the GNU C Library
+dnl and other implementations do it.  See:
+dnl https://sourceware.org/bugzilla/show_bug.cgi?id=19932
+
+AC_DEFUN([gl_MBRTOWC_C_LOCALE],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether the C locale is free of encoding errors],
+    [gl_cv_func_mbrtowc_C_locale_sans_EILSEQ],
+    [
+     dnl Initial guess, used when cross-compiling or when no suitable locale
+     dnl is present.
+     gl_cv_func_mbrtowc_C_locale_sans_EILSEQ="$gl_cross_guess_normal"
+
+     AC_RUN_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <limits.h>
+            #include <locale.h>
+            #include <wchar.h>
+          ]], [[
+            int i;
+            char *locale = setlocale (LC_ALL, "C");
+            if (! locale)
+              return 2;
+            for (i = CHAR_MIN; i <= CHAR_MAX; i++)
+              {
+                char c = i;
+                wchar_t wc;
+                mbstate_t mbs = { 0, };
+                size_t ss = mbrtowc (&wc, &c, 1, &mbs);
+                if (1 < ss)
+                  return 3;
+              }
+            return 0;
+          ]])],
+      [gl_cv_func_mbrtowc_C_locale_sans_EILSEQ=yes],
+      [gl_cv_func_mbrtowc_C_locale_sans_EILSEQ=no],
+      [case "$host_os" in
+                 # Guess yes on native Windows.
+         mingw*) gl_cv_func_mbrtowc_C_locale_sans_EILSEQ="guessing yes" ;;
+       esac
+      ])
+    ])
+])
+
+# Prerequisites of lib/mbrtowc.c and lib/lc-charset-dispatch.c.
+AC_DEFUN([gl_PREREQ_MBRTOWC], [
+  AC_REQUIRE([AC_C_INLINE])
+  :
+])
+
+# Prerequisites of lib/mbtowc-lock.c.
+AC_DEFUN([gl_PREREQ_MBTOWC_LOCK],
+[
+  gl_VISIBILITY
+])
+
+
+dnl From Paul Eggert
+
+dnl This is an override of an autoconf macro.
+
+AC_DEFUN([AC_FUNC_MBRTOWC],
+[
+  dnl Same as AC_FUNC_MBRTOWC in autoconf-2.60.
+  AC_CACHE_CHECK([whether mbrtowc and mbstate_t are properly declared],
+    [gl_cv_func_mbrtowc],
+    [AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+            [[#include <wchar.h>]],
+            [[wchar_t wc;
+              char const s[] = "";
+              size_t n = 1;
+              mbstate_t state;
+              return ! (sizeof state && (mbrtowc) (&wc, s, n, &state));]])],
+       [gl_cv_func_mbrtowc=yes],
+       [gl_cv_func_mbrtowc=no])])
+  if test $gl_cv_func_mbrtowc = yes; then
+    AC_DEFINE([HAVE_MBRTOWC], [1],
+      [Define to 1 if mbrtowc and mbstate_t are properly declared.])
+  fi
+])
diff --git a/src/grep/m4/mbsinit.m4 b/src/grep/m4/mbsinit.m4
new file mode 100644
index 0000000..dc6e10d
--- /dev/null
+++ b/src/grep/m4/mbsinit.m4
@@ -0,0 +1,44 @@
+# mbsinit.m4 serial 9
+dnl Copyright (C) 2008, 2010-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_MBSINIT],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+
+  AC_REQUIRE([AC_TYPE_MBSTATE_T])
+  gl_MBSTATE_T_BROKEN
+
+  AC_CHECK_FUNCS_ONCE([mbsinit])
+  if test $ac_cv_func_mbsinit = no; then
+    HAVE_MBSINIT=0
+    AC_CHECK_DECLS([mbsinit],,, [[
+      #include <wchar.h>
+    ]])
+    if test $ac_cv_have_decl_mbsinit = yes; then
+      dnl On Minix 3.1.8, the system's <wchar.h> declares mbsinit() although
+      dnl it does not have the function. Avoid a collision with gnulib's
+      dnl replacement.
+      REPLACE_MBSINIT=1
+    fi
+  else
+    if test $REPLACE_MBSTATE_T = 1; then
+      REPLACE_MBSINIT=1
+    else
+      dnl On mingw, mbsinit() always returns 1, which is inappropriate for
+      dnl states produced by mbrtowc() for an incomplete multibyte character
+      dnl in multibyte locales.
+      case "$host_os" in
+        mingw*) REPLACE_MBSINIT=1 ;;
+      esac
+    fi
+  fi
+])
+
+# Prerequisites of lib/mbsinit.c.
+AC_DEFUN([gl_PREREQ_MBSINIT], [
+  :
+])
diff --git a/src/grep/m4/mbslen.m4 b/src/grep/m4/mbslen.m4
new file mode 100644
index 0000000..0801fdf
--- /dev/null
+++ b/src/grep/m4/mbslen.m4
@@ -0,0 +1,16 @@
+# mbslen.m4 serial 3
+dnl Copyright (C) 2010-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_MBSLEN],
+[
+  AC_REQUIRE([gl_STRING_H_DEFAULTS])
+  AC_CHECK_FUNCS_ONCE([mbslen])
+  if test $ac_cv_func_mbslen = yes; then
+    HAVE_MBSLEN=1
+  else
+    HAVE_MBSLEN=0
+  fi
+])
diff --git a/src/grep/m4/mbsrtowcs.m4 b/src/grep/m4/mbsrtowcs.m4
new file mode 100644
index 0000000..cf8e962
--- /dev/null
+++ b/src/grep/m4/mbsrtowcs.m4
@@ -0,0 +1,141 @@
+# mbsrtowcs.m4 serial 14
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_MBSRTOWCS],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+
+  AC_REQUIRE([AC_TYPE_MBSTATE_T])
+  gl_MBSTATE_T_BROKEN
+
+  AC_CHECK_FUNCS_ONCE([mbsrtowcs])
+  if test $ac_cv_func_mbsrtowcs = no; then
+    HAVE_MBSRTOWCS=0
+    AC_CHECK_DECLS([mbsrtowcs],,, [[
+      #include <wchar.h>
+    ]])
+    if test $ac_cv_have_decl_mbsrtowcs = yes; then
+      dnl On Minix 3.1.8, the system's <wchar.h> declares mbsrtowcs() although
+      dnl it does not have the function. Avoid a collision with gnulib's
+      dnl replacement.
+      REPLACE_MBSRTOWCS=1
+    fi
+  else
+    if test $REPLACE_MBSTATE_T = 1; then
+      REPLACE_MBSRTOWCS=1
+    else
+      gl_MBSRTOWCS_WORKS
+      case "$gl_cv_func_mbsrtowcs_works" in
+        *yes) ;;
+        *) REPLACE_MBSRTOWCS=1 ;;
+      esac
+    fi
+  fi
+])
+
+dnl Test whether mbsrtowcs works.
+dnl Result is gl_cv_func_mbsrtowcs_works.
+
+AC_DEFUN([gl_MBSRTOWCS_WORKS],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gt_LOCALE_FR])
+  AC_REQUIRE([gt_LOCALE_FR_UTF8])
+  AC_REQUIRE([gt_LOCALE_JA])
+  AC_REQUIRE([gt_LOCALE_ZH_CN])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether mbsrtowcs works],
+    [gl_cv_func_mbsrtowcs_works],
+    [
+      dnl Initial guess, used when cross-compiling or when no suitable locale
+      dnl is present.
+changequote(,)dnl
+      case "$host_os" in
+                                   # Guess no on HP-UX, Solaris, mingw.
+        hpux* | solaris* | mingw*) gl_cv_func_mbsrtowcs_works="guessing no" ;;
+                                   # Guess yes otherwise.
+        *)                         gl_cv_func_mbsrtowcs_works="guessing yes" ;;
+      esac
+changequote([,])dnl
+      if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then
+        AC_RUN_IFELSE(
+          [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  int result = 0;
+  /* Test whether the function supports a NULL destination argument.
+     This fails on native Windows.  */
+  if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
+    {
+      const char input[] = "\337er";
+      const char *src = input;
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbsrtowcs (NULL, &src, 1, &state) != 3
+          || src != input)
+        result |= 1;
+    }
+  /* Test whether the function works when started with a conversion state
+     in non-initial state.  This fails on HP-UX 11.11 and Solaris 10.  */
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      const char input[] = "B\303\274\303\237er";
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (NULL, input + 1, 1, &state) == (size_t)(-2))
+        if (!mbsinit (&state))
+          {
+            const char *src = input + 2;
+            if (mbsrtowcs (NULL, &src, 10, &state) != 4)
+              result |= 2;
+          }
+    }
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      const char input[] = "<\306\374\313\334\270\354>";
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (NULL, input + 3, 1, &state) == (size_t)(-2))
+        if (!mbsinit (&state))
+          {
+            const char *src = input + 4;
+            if (mbsrtowcs (NULL, &src, 10, &state) != 3)
+              result |= 4;
+          }
+    }
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      const char input[] = "B\250\271\201\060\211\070er";
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (NULL, input + 1, 1, &state) == (size_t)(-2))
+        if (!mbsinit (&state))
+          {
+            const char *src = input + 2;
+            if (mbsrtowcs (NULL, &src, 10, &state) != 4)
+              result |= 8;
+          }
+    }
+  return result;
+}]])],
+          [gl_cv_func_mbsrtowcs_works=yes],
+          [gl_cv_func_mbsrtowcs_works=no],
+          [:])
+      fi
+    ])
+])
+
+# Prerequisites of lib/mbsrtowcs.c.
+AC_DEFUN([gl_PREREQ_MBSRTOWCS], [
+  :
+])
diff --git a/src/grep/m4/mbstate_t.m4 b/src/grep/m4/mbstate_t.m4
new file mode 100644
index 0000000..e7fe358
--- /dev/null
+++ b/src/grep/m4/mbstate_t.m4
@@ -0,0 +1,34 @@
+# mbstate_t.m4 serial 14
+dnl Copyright (C) 2000-2002, 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# From Paul Eggert.
+
+# BeOS 5 has <wchar.h> but does not define mbstate_t,
+# so you can't declare an object of that type.
+# Check for this incompatibility with Standard C.
+
+# AC_TYPE_MBSTATE_T
+# -----------------
+AC_DEFUN([AC_TYPE_MBSTATE_T],
+[
+   AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) dnl for HP-UX 11.11
+
+   AC_CACHE_CHECK([for mbstate_t], [ac_cv_type_mbstate_t],
+     [AC_COMPILE_IFELSE(
+        [AC_LANG_PROGRAM(
+           [AC_INCLUDES_DEFAULT[
+             #include <wchar.h>]],
+           [[mbstate_t x; return sizeof x;]])],
+        [ac_cv_type_mbstate_t=yes],
+        [ac_cv_type_mbstate_t=no])])
+   if test $ac_cv_type_mbstate_t = yes; then
+     AC_DEFINE([HAVE_MBSTATE_T], [1],
+               [Define to 1 if <wchar.h> declares mbstate_t.])
+   else
+     AC_DEFINE([mbstate_t], [int],
+               [Define to a type if <wchar.h> does not define.])
+   fi
+])
diff --git a/src/grep/m4/mbtowc.m4 b/src/grep/m4/mbtowc.m4
new file mode 100644
index 0000000..7fc74c9
--- /dev/null
+++ b/src/grep/m4/mbtowc.m4
@@ -0,0 +1,24 @@
+# mbtowc.m4 serial 3
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_MBTOWC],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+
+  AC_CHECK_FUNCS([mbtowc])
+  if test $ac_cv_func_mbtowc = no; then
+    HAVE_MBTOWC=0
+  else
+    if false; then
+      REPLACE_MBTOWC=1
+    fi
+  fi
+])
+
+# Prerequisites of lib/mbtowc.c.
+AC_DEFUN([gl_PREREQ_MBTOWC], [
+  :
+])
diff --git a/src/grep/m4/memchr.m4 b/src/grep/m4/memchr.m4
new file mode 100644
index 0000000..ca08192
--- /dev/null
+++ b/src/grep/m4/memchr.m4
@@ -0,0 +1,106 @@
+# memchr.m4 serial 18
+dnl Copyright (C) 2002-2004, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN_ONCE([gl_FUNC_MEMCHR],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+  dnl Check for prerequisites for memory fence checks.
+  gl_FUNC_MMAP_ANON
+  AC_CHECK_HEADERS_ONCE([sys/mman.h])
+  AC_CHECK_FUNCS_ONCE([mprotect])
+
+  AC_REQUIRE([gl_STRING_H_DEFAULTS])
+  # Detect platform-specific bugs in some versions of glibc:
+  # memchr should not dereference anything with length 0
+  #   https://bugzilla.redhat.com/show_bug.cgi?id=499689
+  # memchr should not dereference overestimated length after a match
+  #   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=521737
+  #   https://sourceware.org/bugzilla/show_bug.cgi?id=10162
+  # memchr should cast the second argument to 'unsigned char'.
+  #   This bug exists in Android 4.3.
+  # Assume that memchr works on platforms that lack mprotect.
+  AC_CACHE_CHECK([whether memchr works], [gl_cv_func_memchr_works],
+    [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+#include <string.h>
+#if HAVE_SYS_MMAN_H
+# include <fcntl.h>
+# include <unistd.h>
+# include <sys/types.h>
+# include <sys/mman.h>
+# ifndef MAP_FILE
+#  define MAP_FILE 0
+# endif
+#endif
+]], [[
+  int result = 0;
+  char *fence = NULL;
+#if HAVE_SYS_MMAN_H && HAVE_MPROTECT
+# if HAVE_MAP_ANONYMOUS
+  const int flags = MAP_ANONYMOUS | MAP_PRIVATE;
+  const int fd = -1;
+# else /* !HAVE_MAP_ANONYMOUS */
+  const int flags = MAP_FILE | MAP_PRIVATE;
+  int fd = open ("/dev/zero", O_RDONLY, 0666);
+  if (fd >= 0)
+# endif
+    {
+      int pagesize = getpagesize ();
+      char *two_pages =
+        (char *) mmap (NULL, 2 * pagesize, PROT_READ | PROT_WRITE,
+                       flags, fd, 0);
+      if (two_pages != (char *)(-1)
+          && mprotect (two_pages + pagesize, pagesize, PROT_NONE) == 0)
+        fence = two_pages + pagesize;
+    }
+#endif
+  if (fence)
+    {
+      /* Test against bugs on glibc systems.  */
+      if (memchr (fence, 0, 0))
+        result |= 1;
+      strcpy (fence - 9, "12345678");
+      if (memchr (fence - 9, 0, 79) != fence - 1)
+        result |= 2;
+      if (memchr (fence - 1, 0, 3) != fence - 1)
+        result |= 4;
+      /* Test against bug on AIX 7.2.  */
+      if (memchr (fence - 4, '6', 16) != fence - 4)
+        result |= 8;
+    }
+  /* Test against bug on Android 4.3.  */
+  {
+    char input[3];
+    input[0] = 'a';
+    input[1] = 'b';
+    input[2] = 'c';
+    if (memchr (input, 0x789abc00 | 'b', 3) != input + 1)
+      result |= 16;
+  }
+  return result;
+]])],
+       [gl_cv_func_memchr_works=yes],
+       [gl_cv_func_memchr_works=no],
+       [case "$host_os" in
+                           # Guess no on Android.
+          linux*-android*) gl_cv_func_memchr_works="guessing no" ;;
+                           # Guess yes on native Windows.
+          mingw*)          gl_cv_func_memchr_works="guessing yes" ;;
+                           # If we don't know, obey --enable-cross-guesses.
+          *)               gl_cv_func_memchr_works="$gl_cross_guess_normal" ;;
+        esac
+       ])
+    ])
+  case "$gl_cv_func_memchr_works" in
+    *yes) ;;
+    *) REPLACE_MEMCHR=1 ;;
+  esac
+])
+
+# Prerequisites of lib/memchr.c.
+AC_DEFUN([gl_PREREQ_MEMCHR], [
+  AC_CHECK_HEADERS([bp-sym.h])
+])
diff --git a/src/grep/m4/mempcpy.m4 b/src/grep/m4/mempcpy.m4
new file mode 100644
index 0000000..f9d9ec8
--- /dev/null
+++ b/src/grep/m4/mempcpy.m4
@@ -0,0 +1,26 @@
+# mempcpy.m4 serial 12
+dnl Copyright (C) 2003-2004, 2006-2007, 2009-2021 Free Software Foundation,
+dnl Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_MEMPCPY],
+[
+  dnl Persuade glibc <string.h> to declare mempcpy().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  dnl The mempcpy() declaration in lib/string.in.h uses 'restrict'.
+  AC_REQUIRE([AC_C_RESTRICT])
+
+  AC_REQUIRE([gl_STRING_H_DEFAULTS])
+  AC_CHECK_FUNCS([mempcpy])
+  if test $ac_cv_func_mempcpy = no; then
+    HAVE_MEMPCPY=0
+  fi
+])
+
+# Prerequisites of lib/mempcpy.c.
+AC_DEFUN([gl_PREREQ_MEMPCPY], [
+  :
+])
diff --git a/src/grep/m4/memrchr.m4 b/src/grep/m4/memrchr.m4
new file mode 100644
index 0000000..40f61c5
--- /dev/null
+++ b/src/grep/m4/memrchr.m4
@@ -0,0 +1,23 @@
+# memrchr.m4 serial 11
+dnl Copyright (C) 2002-2003, 2005-2007, 2009-2021 Free Software Foundation,
+dnl Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_MEMRCHR],
+[
+  dnl Persuade glibc <string.h> to declare memrchr().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_REQUIRE([gl_STRING_H_DEFAULTS])
+  AC_CHECK_DECLS_ONCE([memrchr])
+  if test $ac_cv_have_decl_memrchr = no; then
+    HAVE_DECL_MEMRCHR=0
+  fi
+
+  AC_CHECK_FUNCS([memrchr])
+])
+
+# Prerequisites of lib/memrchr.c.
+AC_DEFUN([gl_PREREQ_MEMRCHR], [:])
diff --git a/src/grep/m4/minmax.m4 b/src/grep/m4/minmax.m4
new file mode 100644
index 0000000..e21a687
--- /dev/null
+++ b/src/grep/m4/minmax.m4
@@ -0,0 +1,44 @@
+# minmax.m4 serial 4
+dnl Copyright (C) 2005, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_PREREQ([2.53])
+
+AC_DEFUN([gl_MINMAX],
+[
+  AC_REQUIRE([gl_PREREQ_MINMAX])
+])
+
+# Prerequisites of lib/minmax.h.
+AC_DEFUN([gl_PREREQ_MINMAX],
+[
+  gl_MINMAX_IN_HEADER([limits.h])
+  gl_MINMAX_IN_HEADER([sys/param.h])
+])
+
+dnl gl_MINMAX_IN_HEADER(HEADER)
+dnl The parameter has to be a literal header name; it cannot be macro,
+dnl nor a shell variable. (Because autoheader collects only AC_DEFINE
+dnl invocations with a literal macro name.)
+AC_DEFUN([gl_MINMAX_IN_HEADER],
+[
+  m4_pushdef([header], AS_TR_SH([$1]))
+  m4_pushdef([HEADER], AS_TR_CPP([$1]))
+  AC_CACHE_CHECK([whether <$1> defines MIN and MAX],
+    [gl_cv_minmax_in_]header,
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <$1>
+            int x = MIN (42, 17);]],
+          [[]])],
+       [gl_cv_minmax_in_]header[=yes],
+       [gl_cv_minmax_in_]header[=no])])
+  if test $gl_cv_minmax_in_[]header = yes; then
+    AC_DEFINE([HAVE_MINMAX_IN_]HEADER, 1,
+      [Define to 1 if <$1> defines the MIN and MAX macros.])
+  fi
+  m4_popdef([HEADER])
+  m4_popdef([header])
+])
diff --git a/src/grep/m4/mmap-anon.m4 b/src/grep/m4/mmap-anon.m4
new file mode 100644
index 0000000..e47aa2d
--- /dev/null
+++ b/src/grep/m4/mmap-anon.m4
@@ -0,0 +1,55 @@
+# mmap-anon.m4 serial 12
+dnl Copyright (C) 2005, 2007, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# Detect how mmap can be used to create anonymous (not file-backed) memory
+# mappings.
+# - On Linux, AIX, OSF/1, Solaris, Cygwin, Interix, Haiku, both MAP_ANONYMOUS
+#   and MAP_ANON exist and have the same value.
+# - On HP-UX, only MAP_ANONYMOUS exists.
+# - On Mac OS X, FreeBSD, NetBSD, OpenBSD, Minix, only MAP_ANON exists.
+# - On IRIX, neither exists, and a file descriptor opened to /dev/zero must be
+#   used.
+
+AC_DEFUN_ONCE([gl_FUNC_MMAP_ANON],
+[
+  dnl Persuade glibc <sys/mman.h> to define MAP_ANONYMOUS.
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+  # Check for mmap(). Don't use AC_FUNC_MMAP, because it checks too much: it
+  # fails on HP-UX 11, because MAP_FIXED mappings do not work. But this is
+  # irrelevant for anonymous mappings.
+  AC_CHECK_FUNC([mmap], [gl_have_mmap=yes], [gl_have_mmap=no])
+
+  # Try to allow MAP_ANONYMOUS.
+  gl_have_mmap_anonymous=no
+  if test $gl_have_mmap = yes; then
+    AC_MSG_CHECKING([for MAP_ANONYMOUS])
+    AC_EGREP_CPP([I cannot identify this map], [
+#include <sys/mman.h>
+#ifdef MAP_ANONYMOUS
+    I cannot identify this map
+#endif
+],
+      [gl_have_mmap_anonymous=yes])
+    if test $gl_have_mmap_anonymous != yes; then
+      AC_EGREP_CPP([I cannot identify this map], [
+#include <sys/mman.h>
+#ifdef MAP_ANON
+    I cannot identify this map
+#endif
+],
+        [AC_DEFINE([MAP_ANONYMOUS], [MAP_ANON],
+          [Define to a substitute value for mmap()'s MAP_ANONYMOUS flag.])
+         gl_have_mmap_anonymous=yes])
+    fi
+    AC_MSG_RESULT([$gl_have_mmap_anonymous])
+    if test $gl_have_mmap_anonymous = yes; then
+      AC_DEFINE([HAVE_MAP_ANONYMOUS], [1],
+        [Define to 1 if mmap()'s MAP_ANONYMOUS flag is available after including
+         config.h and <sys/mman.h>.])
+    fi
+  fi
+])
diff --git a/src/grep/m4/mode_t.m4 b/src/grep/m4/mode_t.m4
new file mode 100644
index 0000000..3bd4b89
--- /dev/null
+++ b/src/grep/m4/mode_t.m4
@@ -0,0 +1,26 @@
+# mode_t.m4 serial 2
+dnl Copyright (C) 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# For using mode_t, it's sufficient to use AC_TYPE_MODE_T and
+# include <sys/types.h>.
+
+# Define PROMOTED_MODE_T to the type that is the result of "default argument
+# promotion" (ISO C 6.5.2.2.(6)) of the type mode_t.
+AC_DEFUN([gl_PROMOTED_TYPE_MODE_T],
+[
+  AC_REQUIRE([AC_TYPE_MODE_T])
+  AC_CACHE_CHECK([for promoted mode_t type], [gl_cv_promoted_mode_t], [
+    dnl Assume mode_t promotes to 'int' if and only if it is smaller than 'int',
+    dnl and to itself otherwise. This assumption is not guaranteed by the ISO C
+    dnl standard, but we don't know of any real-world counterexamples.
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>]],
+      [[typedef int array[2 * (sizeof (mode_t) < sizeof (int)) - 1];]])],
+      [gl_cv_promoted_mode_t='int'],
+      [gl_cv_promoted_mode_t='mode_t'])
+  ])
+  AC_DEFINE_UNQUOTED([PROMOTED_MODE_T], [$gl_cv_promoted_mode_t],
+    [Define to the type that is the result of default argument promotions of type mode_t.])
+])
diff --git a/src/grep/m4/msvc-inval.m4 b/src/grep/m4/msvc-inval.m4
new file mode 100644
index 0000000..3ba5b4e
--- /dev/null
+++ b/src/grep/m4/msvc-inval.m4
@@ -0,0 +1,19 @@
+# msvc-inval.m4 serial 1
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_MSVC_INVAL],
+[
+  AC_CHECK_FUNCS_ONCE([_set_invalid_parameter_handler])
+  if test $ac_cv_func__set_invalid_parameter_handler = yes; then
+    HAVE_MSVC_INVALID_PARAMETER_HANDLER=1
+    AC_DEFINE([HAVE_MSVC_INVALID_PARAMETER_HANDLER], [1],
+      [Define to 1 on MSVC platforms that have the "invalid parameter handler"
+       concept.])
+  else
+    HAVE_MSVC_INVALID_PARAMETER_HANDLER=0
+  fi
+  AC_SUBST([HAVE_MSVC_INVALID_PARAMETER_HANDLER])
+])
diff --git a/src/grep/m4/msvc-nothrow.m4 b/src/grep/m4/msvc-nothrow.m4
new file mode 100644
index 0000000..aae25ce
--- /dev/null
+++ b/src/grep/m4/msvc-nothrow.m4
@@ -0,0 +1,10 @@
+# msvc-nothrow.m4 serial 1
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_MSVC_NOTHROW],
+[
+  AC_REQUIRE([gl_MSVC_INVAL])
+])
diff --git a/src/grep/m4/multiarch.m4 b/src/grep/m4/multiarch.m4
new file mode 100644
index 0000000..f1678d9
--- /dev/null
+++ b/src/grep/m4/multiarch.m4
@@ -0,0 +1,65 @@
+# multiarch.m4 serial 9
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# Determine whether the compiler is or may be producing universal binaries.
+#
+# On Mac OS X 10.5 and later systems, the user can create libraries and
+# executables that work on multiple system types--known as "fat" or
+# "universal" binaries--by specifying multiple '-arch' options to the
+# compiler but only a single '-arch' option to the preprocessor.  Like
+# this:
+#
+#     ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+#                 CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+#                 CPP="gcc -E" CXXCPP="g++ -E"
+#
+# Detect this situation and set APPLE_UNIVERSAL_BUILD accordingly.
+
+AC_DEFUN_ONCE([gl_MULTIARCH],
+[
+  dnl Code similar to autoconf-2.63 AC_C_BIGENDIAN.
+  AC_CACHE_CHECK([whether the compiler produces multi-arch binaries],
+    [gl_cv_c_multiarch],
+    [gl_cv_c_multiarch=no
+     AC_COMPILE_IFELSE(
+       [AC_LANG_SOURCE(
+         [[#ifndef __APPLE_CC__
+            not a universal capable compiler
+           #endif
+           typedef int dummy;
+         ]])],
+       [
+        dnl Check for potential -arch flags.  It is not universal unless
+        dnl there are at least two -arch flags with different values.
+        arch=
+        prev=
+        for word in ${CC} ${CFLAGS} ${CPPFLAGS} ${LDFLAGS}; do
+          if test -n "$prev"; then
+            case $word in
+              i?86 | x86_64 | ppc | ppc64 | arm | arm64)
+                if test -z "$arch" || test "$arch" = "$word"; then
+                  arch="$word"
+                else
+                  gl_cv_c_multiarch=yes
+                fi
+                ;;
+            esac
+            prev=
+          else
+            if test "x$word" = "x-arch"; then
+              prev=arch
+            fi
+          fi
+        done
+       ])
+    ])
+  if test $gl_cv_c_multiarch = yes; then
+    APPLE_UNIVERSAL_BUILD=1
+  else
+    APPLE_UNIVERSAL_BUILD=0
+  fi
+  AC_SUBST([APPLE_UNIVERSAL_BUILD])
+])
diff --git a/src/grep/m4/musl.m4 b/src/grep/m4/musl.m4
new file mode 100644
index 0000000..60bd62a
--- /dev/null
+++ b/src/grep/m4/musl.m4
@@ -0,0 +1,18 @@
+# musl.m4 serial 3
+dnl Copyright (C) 2019-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# Test for musl libc, despite the musl libc authors don't like it
+# <https://wiki.musl-libc.org/faq.html>
+# <https://lists.gnu.org/archive/html/bug-gnulib/2018-02/msg00079.html>.
+# From Bruno Haible.
+
+AC_DEFUN_ONCE([gl_MUSL_LIBC],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  case "$host_os" in
+    *-musl*) AC_DEFINE([MUSL_LIBC], [1], [Define to 1 on musl libc.]) ;;
+  esac
+])
diff --git a/src/grep/m4/nanosleep.m4 b/src/grep/m4/nanosleep.m4
new file mode 100644
index 0000000..baebe88
--- /dev/null
+++ b/src/grep/m4/nanosleep.m4
@@ -0,0 +1,161 @@
+# serial 40
+
+dnl From Jim Meyering.
+dnl Check for the nanosleep function.
+dnl If not found, use the supplied replacement.
+dnl
+
+# Copyright (C) 1999-2001, 2003-2021 Free Software Foundation, Inc.
+
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_NANOSLEEP],
+[
+ AC_REQUIRE([gl_TIME_H_DEFAULTS])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+ dnl Persuade glibc and Solaris <time.h> to declare nanosleep.
+ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+ AC_CHECK_HEADERS_ONCE([sys/time.h])
+ AC_REQUIRE([gl_FUNC_SELECT])
+
+ AC_CHECK_DECLS_ONCE([alarm])
+
+ nanosleep_save_libs=$LIBS
+
+ # Solaris 2.5.1 needs -lposix4 to get the nanosleep function.
+ # Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.
+ LIB_NANOSLEEP=
+ AC_SUBST([LIB_NANOSLEEP])
+ AC_SEARCH_LIBS([nanosleep], [rt posix4],
+                [test "$ac_cv_search_nanosleep" = "none required" ||
+                 LIB_NANOSLEEP=$ac_cv_search_nanosleep])
+ if test "x$ac_cv_search_nanosleep" != xno; then
+   dnl The system has a nanosleep function.
+
+   AC_REQUIRE([gl_MULTIARCH])
+   if test $APPLE_UNIVERSAL_BUILD = 1; then
+     # A universal build on Apple Mac OS X platforms.
+     # The test result would be 'no (mishandles large arguments)' in 64-bit
+     # mode but 'yes' in 32-bit mode. But we need a configuration result that
+     # is valid in both modes.
+     gl_cv_func_nanosleep='no (mishandles large arguments)'
+   fi
+
+   AC_CACHE_CHECK([for working nanosleep],
+    [gl_cv_func_nanosleep],
+    [
+     AC_RUN_IFELSE(
+       [AC_LANG_SOURCE([[
+          #include <errno.h>
+          #include <limits.h>
+          #include <signal.h>
+          #if HAVE_SYS_TIME_H
+           #include <sys/time.h>
+          #endif
+          #include <time.h>
+          #include <unistd.h>
+          #define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
+          #define TYPE_MAXIMUM(t) \
+            ((t) (! TYPE_SIGNED (t) \
+                  ? (t) -1 \
+                  : ((((t) 1 << (sizeof (t) * CHAR_BIT - 2)) - 1) * 2 + 1)))
+
+          #if HAVE_DECL_ALARM
+          static void
+          check_for_SIGALRM (int sig)
+          {
+            if (sig != SIGALRM)
+              _exit (1);
+          }
+          #endif
+
+          int
+          main ()
+          {
+            static struct timespec ts_sleep;
+            static struct timespec ts_remaining;
+            /* Test for major problems first.  */
+            if (! nanosleep)
+              return 2;
+            ts_sleep.tv_sec = 0;
+            ts_sleep.tv_nsec = 1;
+            #if HAVE_DECL_ALARM
+            {
+              static struct sigaction act;
+              act.sa_handler = check_for_SIGALRM;
+              sigemptyset (&act.sa_mask);
+              sigaction (SIGALRM, &act, NULL);
+              alarm (1);
+              if (nanosleep (&ts_sleep, NULL) != 0)
+                return 3;
+              /* Test for a minor problem: the handling of large arguments.  */
+              ts_sleep.tv_sec = TYPE_MAXIMUM (time_t);
+              ts_sleep.tv_nsec = 999999999;
+              alarm (1);
+              if (nanosleep (&ts_sleep, &ts_remaining) != -1)
+                return 4;
+              if (errno != EINTR)
+                return 5;
+              if (ts_remaining.tv_sec <= TYPE_MAXIMUM (time_t) - 10)
+                return 6;
+            }
+            #else /* A simpler test for native Windows.  */
+            if (nanosleep (&ts_sleep, &ts_remaining) < 0)
+              return 3;
+            #endif
+            return 0;
+          }]])],
+       [gl_cv_func_nanosleep=yes],
+       [case $? in dnl (
+        4|5|6) gl_cv_func_nanosleep='no (mishandles large arguments)';; dnl (
+        *)   gl_cv_func_nanosleep=no;;
+        esac],
+       [case "$host_os" in dnl ((
+          linux*) # Guess it halfway works when the kernel is Linux.
+            gl_cv_func_nanosleep='guessing no (mishandles large arguments)' ;;
+          mingw*) # Guess no on native Windows.
+            gl_cv_func_nanosleep='guessing no' ;;
+          *)      # If we don't know, obey --enable-cross-guesses.
+            gl_cv_func_nanosleep="$gl_cross_guess_normal" ;;
+        esac
+       ])
+    ])
+   case "$gl_cv_func_nanosleep" in
+     *yes)
+       REPLACE_NANOSLEEP=0
+       ;;
+     *)
+       REPLACE_NANOSLEEP=1
+       case "$gl_cv_func_nanosleep" in
+         *"mishandles large arguments"*)
+           AC_DEFINE([HAVE_BUG_BIG_NANOSLEEP], [1],
+             [Define to 1 if nanosleep mishandles large arguments.])
+           ;;
+         *)
+           # The replacement uses select(). Add $LIBSOCKET to $LIB_NANOSLEEP.
+           for ac_lib in $LIBSOCKET; do
+             case " $LIB_NANOSLEEP " in
+               *" $ac_lib "*) ;;
+               *) LIB_NANOSLEEP="$LIB_NANOSLEEP $ac_lib";;
+             esac
+           done
+           ;;
+       esac
+       ;;
+   esac
+ else
+   HAVE_NANOSLEEP=0
+ fi
+ LIBS=$nanosleep_save_libs
+])
+
+# Prerequisites of lib/nanosleep.c.
+AC_DEFUN([gl_PREREQ_NANOSLEEP],
+[
+  AC_CHECK_HEADERS_ONCE([sys/select.h])
+  gl_PREREQ_SIG_HANDLER_H
+])
diff --git a/src/grep/m4/netinet_in_h.m4 b/src/grep/m4/netinet_in_h.m4
new file mode 100644
index 0000000..c555596
--- /dev/null
+++ b/src/grep/m4/netinet_in_h.m4
@@ -0,0 +1,31 @@
+# netinet_in_h.m4 serial 5
+dnl Copyright (C) 2006-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_HEADER_NETINET_IN],
+[
+  AC_CACHE_CHECK([whether <netinet/in.h> is self-contained],
+    [gl_cv_header_netinet_in_h_selfcontained],
+    [
+      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <netinet/in.h>]], [[]])],
+        [gl_cv_header_netinet_in_h_selfcontained=yes],
+        [gl_cv_header_netinet_in_h_selfcontained=no])
+    ])
+  if test $gl_cv_header_netinet_in_h_selfcontained = yes; then
+    NETINET_IN_H=''
+  else
+    NETINET_IN_H='netinet/in.h'
+    AC_CHECK_HEADERS([netinet/in.h])
+    gl_CHECK_NEXT_HEADERS([netinet/in.h])
+    if test $ac_cv_header_netinet_in_h = yes; then
+      HAVE_NETINET_IN_H=1
+    else
+      HAVE_NETINET_IN_H=0
+    fi
+    AC_SUBST([HAVE_NETINET_IN_H])
+  fi
+  AC_SUBST([NETINET_IN_H])
+  AM_CONDITIONAL([GL_GENERATE_NETINET_IN_H], [test -n "$NETINET_IN_H"])
+])
diff --git a/src/grep/m4/nl_langinfo.m4 b/src/grep/m4/nl_langinfo.m4
new file mode 100644
index 0000000..6ad32c8
--- /dev/null
+++ b/src/grep/m4/nl_langinfo.m4
@@ -0,0 +1,77 @@
+# nl_langinfo.m4 serial 8
+dnl Copyright (C) 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_NL_LANGINFO],
+[
+  AC_REQUIRE([gl_LANGINFO_H_DEFAULTS])
+  AC_REQUIRE([gl_LANGINFO_H])
+  AC_CHECK_FUNCS_ONCE([nl_langinfo])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([gl_FUNC_SETLOCALE_NULL])
+  AC_REQUIRE([gl_PTHREADLIB])
+  AC_CHECK_HEADERS_ONCE([threads.h])
+  if test $ac_cv_func_nl_langinfo = yes; then
+    # On Irix 6.5, YESEXPR is defined, but nl_langinfo(YESEXPR) is broken.
+    AC_CACHE_CHECK([whether YESEXPR works],
+      [gl_cv_func_nl_langinfo_yesexpr_works],
+      [AC_RUN_IFELSE(
+         [AC_LANG_PROGRAM([[#include <langinfo.h>
+]], [[return !*nl_langinfo(YESEXPR);
+]])],
+         [gl_cv_func_nl_langinfo_yesexpr_works=yes],
+         [gl_cv_func_nl_langinfo_yesexpr_works=no],
+         [
+         case "$host_os" in
+                   # Guess no on irix systems.
+           irix*)  gl_cv_func_nl_langinfo_yesexpr_works="guessing no";;
+                   # Guess yes elsewhere.
+           *)      gl_cv_func_nl_langinfo_yesexpr_works="guessing yes";;
+         esac
+         ])
+      ])
+    case $gl_cv_func_nl_langinfo_yesexpr_works in
+      *yes) FUNC_NL_LANGINFO_YESEXPR_WORKS=1 ;;
+      *)    FUNC_NL_LANGINFO_YESEXPR_WORKS=0 ;;
+    esac
+    AC_DEFINE_UNQUOTED([FUNC_NL_LANGINFO_YESEXPR_WORKS],
+      [$FUNC_NL_LANGINFO_YESEXPR_WORKS],
+      [Define to 1 if nl_langinfo (YESEXPR) returns a non-empty string.])
+    # On Solaris 10 and Solaris 11.3, nl_langinfo is not multithread-safe.
+    case "$host_os" in
+      solaris*) NL_LANGINFO_MTSAFE=0 ;;
+      *)        NL_LANGINFO_MTSAFE=1 ;;
+    esac
+    AC_DEFINE_UNQUOTED([NL_LANGINFO_MTSAFE], [$NL_LANGINFO_MTSAFE],
+      [Define to 1 if nl_langinfo is multithread-safe.])
+    if test $HAVE_LANGINFO_CODESET = 1 \
+       && test $HAVE_LANGINFO_T_FMT_AMPM = 1 \
+       && test $HAVE_LANGINFO_ALTMON = 1 \
+       && test $HAVE_LANGINFO_ERA = 1 \
+       && test $FUNC_NL_LANGINFO_YESEXPR_WORKS = 1 \
+       && test $NL_LANGINFO_MTSAFE = 1; then
+      :
+    else
+      REPLACE_NL_LANGINFO=1
+      AC_DEFINE([REPLACE_NL_LANGINFO], [1],
+        [Define if nl_langinfo exists but is overridden by gnulib.])
+    fi
+  else
+    HAVE_NL_LANGINFO=0
+  fi
+  if test $HAVE_NL_LANGINFO = 0 || test $HAVE_LANGINFO_CODESET = 0; then
+    LIB_NL_LANGINFO="$LIB_SETLOCALE_NULL"
+  else
+    LIB_NL_LANGINFO=
+  fi
+  dnl LIB_NL_LANGINFO is expected to be empty everywhere.
+  AC_SUBST([LIB_NL_LANGINFO])
+])
+
+# Prerequisites of lib/nl_langinfo-lock.c.
+AC_DEFUN([gl_PREREQ_NL_LANGINFO_LOCK],
+[
+  gl_VISIBILITY
+])
diff --git a/src/grep/m4/nls.m4 b/src/grep/m4/nls.m4
new file mode 100644
index 0000000..8f8a147
--- /dev/null
+++ b/src/grep/m4/nls.m4
@@ -0,0 +1,32 @@
+# nls.m4 serial 5 (gettext-0.18)
+dnl Copyright (C) 1995-2003, 2005-2006, 2008-2013 Free Software Foundation,
+dnl Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+dnl
+dnl This file can can be used in projects which are not available under
+dnl the GNU General Public License or the GNU Library General Public
+dnl License but which still want to provide support for the GNU gettext
+dnl functionality.
+dnl Please note that the actual code of the GNU gettext library is covered
+dnl by the GNU Library General Public License, and the rest of the GNU
+dnl gettext package package is covered by the GNU General Public License.
+dnl They are *not* in the public domain.
+
+dnl Authors:
+dnl   Ulrich Drepper <drepper@cygnus.com>, 1995-2000.
+dnl   Bruno Haible <haible@clisp.cons.org>, 2000-2003.
+
+AC_PREREQ([2.50])
+
+AC_DEFUN([AM_NLS],
+[
+  AC_MSG_CHECKING([whether NLS is requested])
+  dnl Default is enabled NLS
+  AC_ARG_ENABLE([nls],
+    [  --disable-nls           do not use Native Language Support],
+    USE_NLS=$enableval, USE_NLS=yes)
+  AC_MSG_RESULT([$USE_NLS])
+  AC_SUBST([USE_NLS])
+])
diff --git a/src/grep/m4/nocrash.m4 b/src/grep/m4/nocrash.m4
new file mode 100644
index 0000000..27412cd
--- /dev/null
+++ b/src/grep/m4/nocrash.m4
@@ -0,0 +1,131 @@
+# nocrash.m4 serial 5
+dnl Copyright (C) 2005, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Based on libsigsegv, from Bruno Haible and Paolo Bonzini.
+
+AC_PREREQ([2.13])
+
+dnl Expands to some code for use in .c programs that will cause the configure
+dnl test to exit instead of crashing. This is useful to avoid triggering
+dnl action from a background debugger and to avoid core dumps.
+dnl Usage:   ...
+dnl          ]GL_NOCRASH[
+dnl          ...
+dnl          int main() { nocrash_init(); ... }
+AC_DEFUN([GL_NOCRASH],[[
+#include <stdlib.h>
+#if defined __MACH__ && defined __APPLE__
+/* Avoid a crash on Mac OS X.  */
+#include <mach/mach.h>
+#include <mach/mach_error.h>
+#include <mach/thread_status.h>
+#include <mach/exception.h>
+#include <mach/task.h>
+#include <pthread.h>
+/* The exception port on which our thread listens.  */
+static mach_port_t our_exception_port;
+/* The main function of the thread listening for exceptions of type
+   EXC_BAD_ACCESS.  */
+static void *
+mach_exception_thread (void *arg)
+{
+  /* Buffer for a message to be received.  */
+  struct {
+    mach_msg_header_t head;
+    mach_msg_body_t msgh_body;
+    char data[1024];
+  } msg;
+  mach_msg_return_t retval;
+  /* Wait for a message on the exception port.  */
+  retval = mach_msg (&msg.head, MACH_RCV_MSG | MACH_RCV_LARGE, 0, sizeof (msg),
+                     our_exception_port, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
+  if (retval != MACH_MSG_SUCCESS)
+    abort ();
+  exit (1);
+}
+static void
+nocrash_init (void)
+{
+  mach_port_t self = mach_task_self ();
+  /* Allocate a port on which the thread shall listen for exceptions.  */
+  if (mach_port_allocate (self, MACH_PORT_RIGHT_RECEIVE, &our_exception_port)
+      == KERN_SUCCESS) {
+    /* See https://web.mit.edu/darwin/src/modules/xnu/osfmk/man/mach_port_insert_right.html.  */
+    if (mach_port_insert_right (self, our_exception_port, our_exception_port,
+                                MACH_MSG_TYPE_MAKE_SEND)
+        == KERN_SUCCESS) {
+      /* The exceptions we want to catch.  Only EXC_BAD_ACCESS is interesting
+         for us.  */
+      exception_mask_t mask = EXC_MASK_BAD_ACCESS;
+      /* Create the thread listening on the exception port.  */
+      pthread_attr_t attr;
+      pthread_t thread;
+      if (pthread_attr_init (&attr) == 0
+          && pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED) == 0
+          && pthread_create (&thread, &attr, mach_exception_thread, NULL) == 0) {
+        pthread_attr_destroy (&attr);
+        /* Replace the exception port info for these exceptions with our own.
+           Note that we replace the exception port for the entire task, not only
+           for a particular thread.  This has the effect that when our exception
+           port gets the message, the thread specific exception port has already
+           been asked, and we don't need to bother about it.
+           See https://web.mit.edu/darwin/src/modules/xnu/osfmk/man/task_set_exception_ports.html.  */
+        task_set_exception_ports (self, mask, our_exception_port,
+                                  EXCEPTION_DEFAULT, MACHINE_THREAD_STATE);
+      }
+    }
+  }
+}
+#elif defined _WIN32 && ! defined __CYGWIN__
+/* Avoid a crash on native Windows.  */
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <winerror.h>
+static LONG WINAPI
+exception_filter (EXCEPTION_POINTERS *ExceptionInfo)
+{
+  switch (ExceptionInfo->ExceptionRecord->ExceptionCode)
+    {
+    case EXCEPTION_ACCESS_VIOLATION:
+    case EXCEPTION_IN_PAGE_ERROR:
+    case EXCEPTION_STACK_OVERFLOW:
+    case EXCEPTION_GUARD_PAGE:
+    case EXCEPTION_PRIV_INSTRUCTION:
+    case EXCEPTION_ILLEGAL_INSTRUCTION:
+    case EXCEPTION_DATATYPE_MISALIGNMENT:
+    case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
+    case EXCEPTION_NONCONTINUABLE_EXCEPTION:
+      exit (1);
+    }
+  return EXCEPTION_CONTINUE_SEARCH;
+}
+static void
+nocrash_init (void)
+{
+  SetUnhandledExceptionFilter ((LPTOP_LEVEL_EXCEPTION_FILTER) exception_filter);
+}
+#else
+/* Avoid a crash on POSIX systems.  */
+#include <signal.h>
+#include <unistd.h>
+/* A POSIX signal handler.  */
+static void
+exception_handler (int sig)
+{
+  _exit (1);
+}
+static void
+nocrash_init (void)
+{
+#ifdef SIGSEGV
+  signal (SIGSEGV, exception_handler);
+#endif
+#ifdef SIGBUS
+  signal (SIGBUS, exception_handler);
+#endif
+}
+#endif
+]])
diff --git a/src/grep/m4/obstack.m4 b/src/grep/m4/obstack.m4
new file mode 100644
index 0000000..e363d01
--- /dev/null
+++ b/src/grep/m4/obstack.m4
@@ -0,0 +1,35 @@
+# See if we need to provide obstacks.
+
+dnl Copyright 1996-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl This replaces Autoconf's AC_FUNC_OBSTACK.
+dnl The Autoconf version should be marked obsolete at some point.
+
+AC_DEFUN([AC_FUNC_OBSTACK],
+  [AC_LIBSOURCES([obstack.h, obstack.c])dnl
+   AC_CACHE_CHECK([for obstacks that work with any size object],
+     [ac_cv_func_obstack],
+     [AC_LINK_IFELSE(
+        [AC_LANG_PROGRAM(
+           [[#include "obstack.h"
+             void *obstack_chunk_alloc (size_t n) { return 0; }
+             void obstack_chunk_free (void *p) { }
+             /* Check that an internal function returns size_t, not int.  */
+             size_t _obstack_memory_used (struct obstack *);
+            ]],
+           [[struct obstack mem;
+             obstack_init (&mem);
+             obstack_free (&mem, 0);
+           ]])],
+        [ac_cv_func_obstack=yes],
+        [ac_cv_func_obstack=no])])
+   if test "$ac_cv_func_obstack" = yes; then
+     AC_DEFINE([HAVE_OBSTACK], 1,
+       [Define to 1 if the system has obstacks that work with any size object.])
+   else
+     AC_LIBOBJ([obstack])
+   fi
+])
diff --git a/src/grep/m4/off_t.m4 b/src/grep/m4/off_t.m4
new file mode 100644
index 0000000..bdec43c
--- /dev/null
+++ b/src/grep/m4/off_t.m4
@@ -0,0 +1,18 @@
+# off_t.m4 serial 1
+dnl Copyright (C) 2012-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Check whether to override the 'off_t' type.
+dnl Set WINDOWS_64_BIT_OFF_T.
+
+AC_DEFUN([gl_TYPE_OFF_T],
+[
+  m4_ifdef([gl_LARGEFILE], [
+    AC_REQUIRE([gl_LARGEFILE])
+  ], [
+    WINDOWS_64_BIT_OFF_T=0
+  ])
+  AC_SUBST([WINDOWS_64_BIT_OFF_T])
+])
diff --git a/src/grep/m4/open-cloexec.m4 b/src/grep/m4/open-cloexec.m4
new file mode 100644
index 0000000..542a90f
--- /dev/null
+++ b/src/grep/m4/open-cloexec.m4
@@ -0,0 +1,21 @@
+# Test whether O_CLOEXEC is defined.
+
+dnl Copyright 2017-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_PREPROC_O_CLOEXEC],
+[
+  AC_CACHE_CHECK([for O_CLOEXEC],
+    [gl_cv_macro_O_CLOEXEC],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM([[#include <fcntl.h>
+                          #ifndef O_CLOEXEC
+                            choke me;
+                          #endif
+                        ]],
+                        [[return O_CLOEXEC;]])],
+       [gl_cv_macro_O_CLOEXEC=yes],
+       [gl_cv_macro_O_CLOEXEC=no])])
+])
diff --git a/src/grep/m4/open-slash.m4 b/src/grep/m4/open-slash.m4
new file mode 100644
index 0000000..e619039
--- /dev/null
+++ b/src/grep/m4/open-slash.m4
@@ -0,0 +1,60 @@
+# open-slash.m4 serial 2
+dnl Copyright (C) 2007-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Tests whether open() and creat() recognize a trailing slash.
+dnl Sets gl_cv_func_open_slash.
+AC_DEFUN([gl_OPEN_TRAILING_SLASH_BUG],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  dnl open("foo/") should not create a file when the file name has a
+  dnl trailing slash.  FreeBSD only has the problem on symlinks.
+  AC_CHECK_FUNCS_ONCE([lstat])
+  AC_CACHE_CHECK([whether open recognizes a trailing slash],
+    [gl_cv_func_open_slash],
+    [# Assume that if we have lstat, we can also check symlinks.
+     if test $ac_cv_func_lstat = yes; then
+       touch conftest.tmp
+       ln -s conftest.tmp conftest.lnk
+     fi
+     AC_RUN_IFELSE(
+       [AC_LANG_SOURCE([[
+#include <fcntl.h>
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+]GL_MDA_DEFINES[
+int main ()
+{
+  int result = 0;
+#if HAVE_LSTAT
+  if (open ("conftest.lnk/", O_RDONLY) != -1)
+    result |= 1;
+#endif
+  if (open ("conftest.sl/", O_CREAT, 0600) >= 0)
+    result |= 2;
+  return result;
+}]])],
+       [gl_cv_func_open_slash=yes],
+       [gl_cv_func_open_slash=no],
+       [
+changequote(,)dnl
+        case "$host_os" in
+          freebsd* | aix* | hpux* | solaris2.[0-9] | solaris2.[0-9].*)
+            gl_cv_func_open_slash="guessing no" ;;
+          *)
+            gl_cv_func_open_slash="guessing yes" ;;
+        esac
+changequote([,])dnl
+       ])
+     rm -f conftest.sl conftest.tmp conftest.lnk
+    ])
+  case "$gl_cv_func_open_slash" in
+    *no)
+      AC_DEFINE([OPEN_TRAILING_SLASH_BUG], [1],
+        [Define to 1 if open() fails to recognize a trailing slash.])
+      ;;
+  esac
+])
diff --git a/src/grep/m4/open.m4 b/src/grep/m4/open.m4
new file mode 100644
index 0000000..c634386
--- /dev/null
+++ b/src/grep/m4/open.m4
@@ -0,0 +1,56 @@
+# open.m4 serial 15
+dnl Copyright (C) 2007-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_OPEN],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([gl_PREPROC_O_CLOEXEC])
+  case "$host_os" in
+    mingw* | pw*)
+      REPLACE_OPEN=1
+      ;;
+    *)
+      dnl open("foo/") should not create a file when the file name has a
+      dnl trailing slash.  FreeBSD only has the problem on symlinks.
+      AC_CHECK_FUNCS_ONCE([lstat])
+      if test "$gl_cv_macro_O_CLOEXEC" != yes; then
+        REPLACE_OPEN=1
+      fi
+      gl_OPEN_TRAILING_SLASH_BUG
+      case "$gl_cv_func_open_slash" in
+        *no)
+          REPLACE_OPEN=1
+          ;;
+      esac
+      ;;
+  esac
+  dnl Replace open() for supporting the gnulib-defined fchdir() function,
+  dnl to keep fchdir's bookkeeping up-to-date.
+  m4_ifdef([gl_FUNC_FCHDIR], [
+    if test $REPLACE_OPEN = 0; then
+      gl_TEST_FCHDIR
+      if test $HAVE_FCHDIR = 0; then
+        REPLACE_OPEN=1
+      fi
+    fi
+  ])
+  dnl Replace open() for supporting the gnulib-defined O_NONBLOCK flag.
+  m4_ifdef([gl_NONBLOCKING_IO], [
+    if test $REPLACE_OPEN = 0; then
+      gl_NONBLOCKING_IO
+      if test $gl_cv_have_open_O_NONBLOCK != yes; then
+        REPLACE_OPEN=1
+      fi
+    fi
+  ])
+])
+
+# Prerequisites of lib/open.c.
+AC_DEFUN([gl_PREREQ_OPEN],
+[
+  AC_REQUIRE([gl_PROMOTED_TYPE_MODE_T])
+  :
+])
diff --git a/src/grep/m4/openat.m4 b/src/grep/m4/openat.m4
new file mode 100644
index 0000000..eba0f51
--- /dev/null
+++ b/src/grep/m4/openat.m4
@@ -0,0 +1,38 @@
+# serial 46
+# See if we need to use our replacement for Solaris' openat et al functions.
+
+dnl Copyright (C) 2004-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# Written by Jim Meyering.
+
+AC_DEFUN([gl_FUNC_OPENAT],
+[
+  AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+  AC_CHECK_FUNCS_ONCE([openat])
+  AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
+  AC_REQUIRE([gl_PREPROC_O_CLOEXEC])
+  case $ac_cv_func_openat+$gl_cv_func_lstat_dereferences_slashed_symlink+$gl_cv_macro_O_CLOEXEC in
+  yes+*yes+yes)
+    ;;
+  yes+*)
+    # Solaris 10 lacks O_CLOEXEC.
+    # Solaris 9 has *at functions, but uniformly mishandles trailing
+    # slash in all of them.
+    REPLACE_OPENAT=1
+    ;;
+  *)
+    HAVE_OPENAT=0
+    ;;
+  esac
+])
+
+# Prerequisites of lib/openat.c.
+AC_DEFUN([gl_PREREQ_OPENAT],
+[
+  AC_REQUIRE([gl_PROMOTED_TYPE_MODE_T])
+  :
+])
diff --git a/src/grep/m4/opendir.m4 b/src/grep/m4/opendir.m4
new file mode 100644
index 0000000..517edae
--- /dev/null
+++ b/src/grep/m4/opendir.m4
@@ -0,0 +1,32 @@
+# opendir.m4 serial 5
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_OPENDIR],
+[
+  AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+  AC_CHECK_FUNCS([opendir])
+  if test $ac_cv_func_opendir = no; then
+    HAVE_OPENDIR=0
+  fi
+  dnl Replace opendir() for supporting the gnulib-defined fchdir() function,
+  dnl to keep fchdir's bookkeeping up-to-date.
+  m4_ifdef([gl_FUNC_FCHDIR], [
+    gl_TEST_FCHDIR
+    if test $HAVE_FCHDIR = 0; then
+      if test $HAVE_OPENDIR = 1; then
+        REPLACE_OPENDIR=1
+      fi
+    fi
+  ])
+  dnl Replace opendir() on OS/2 kLIBC to support dirfd() function replaced
+  dnl by gnulib.
+  case $host_os,$HAVE_OPENDIR in
+    os2*,1)
+      REPLACE_OPENDIR=1;;
+  esac
+])
diff --git a/src/grep/m4/pathmax.m4 b/src/grep/m4/pathmax.m4
new file mode 100644
index 0000000..e67c656
--- /dev/null
+++ b/src/grep/m4/pathmax.m4
@@ -0,0 +1,42 @@
+# pathmax.m4 serial 11
+dnl Copyright (C) 2002-2003, 2005-2006, 2009-2021 Free Software Foundation,
+dnl Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_PATHMAX],
+[
+  dnl Prerequisites of lib/pathmax.h.
+  AC_CHECK_HEADERS_ONCE([sys/param.h])
+])
+
+# Expands to a piece of C program that defines PATH_MAX in the same way as
+# "pathmax.h" will do.
+AC_DEFUN([gl_PATHMAX_SNIPPET], [[
+/* Arrange to define PATH_MAX, like "pathmax.h" does. */
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+#include <limits.h>
+#if defined HAVE_SYS_PARAM_H && !defined PATH_MAX && !defined MAXPATHLEN
+# include <sys/param.h>
+#endif
+#if !defined PATH_MAX && defined MAXPATHLEN
+# define PATH_MAX MAXPATHLEN
+#endif
+#ifdef __hpux
+# undef PATH_MAX
+# define PATH_MAX 1024
+#endif
+#if defined _WIN32 && ! defined __CYGWIN__
+# undef PATH_MAX
+# define PATH_MAX 260
+#endif
+]])
+
+# Prerequisites of gl_PATHMAX_SNIPPET.
+AC_DEFUN([gl_PATHMAX_SNIPPET_PREREQ],
+[
+  AC_CHECK_HEADERS_ONCE([unistd.h sys/param.h])
+])
diff --git a/src/grep/m4/pcre.m4 b/src/grep/m4/pcre.m4
new file mode 100644
index 0000000..78b7fda
--- /dev/null
+++ b/src/grep/m4/pcre.m4
@@ -0,0 +1,58 @@
+# pcre.m4 - check for libpcre support
+
+# Copyright (C) 2010-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_PCRE],
+[
+  AC_ARG_ENABLE([perl-regexp],
+    AS_HELP_STRING([--disable-perl-regexp],
+                   [disable perl-regexp (pcre) support]),
+    [case $enableval in
+       yes|no) test_pcre=$enableval;;
+       *) AC_MSG_ERROR([invalid value $enableval for --disable-perl-regexp]);;
+     esac],
+    [test_pcre=maybe])
+
+  AC_SUBST([PCRE_CFLAGS])
+  AC_SUBST([PCRE_LIBS])
+  use_pcre=no
+
+  if test $test_pcre != no; then
+    PKG_CHECK_MODULES([PCRE], [libpcre], [], [: ${PCRE_LIBS=-lpcre}])
+
+    AC_CACHE_CHECK([for pcre_compile], [pcre_cv_have_pcre_compile],
+      [pcre_saved_CFLAGS=$CFLAGS
+       pcre_saved_LIBS=$LIBS
+       CFLAGS="$CFLAGS $PCRE_CFLAGS"
+       LIBS="$PCRE_LIBS $LIBS"
+       AC_LINK_IFELSE(
+         [AC_LANG_PROGRAM([[#include <pcre.h>
+                          ]],
+            [[pcre *p = pcre_compile (0, 0, 0, 0, 0);
+              return !p;]])],
+         [pcre_cv_have_pcre_compile=yes],
+         [pcre_cv_have_pcre_compile=no])
+       CFLAGS=$pcre_saved_CFLAGS
+       LIBS=$pcre_saved_LIBS])
+
+    if test "$pcre_cv_have_pcre_compile" = yes; then
+      use_pcre=yes
+    elif test $test_pcre = maybe; then
+      AC_MSG_WARN([AC_PACKAGE_NAME will be built without pcre support.])
+    else
+      AC_MSG_ERROR([pcre support not available])
+    fi
+  fi
+
+  if test $use_pcre = yes; then
+    AC_DEFINE([HAVE_LIBPCRE], [1],
+      [Define to 1 if you have the Perl Compatible Regular Expressions
+       library (-lpcre).])
+  else
+    PCRE_CFLAGS=
+    PCRE_LIBS=
+  fi
+])
diff --git a/src/grep/m4/perl.m4 b/src/grep/m4/perl.m4
new file mode 100644
index 0000000..0d55101
--- /dev/null
+++ b/src/grep/m4/perl.m4
@@ -0,0 +1,46 @@
+# serial 10
+
+dnl From Jim Meyering.
+dnl Find a new-enough version of Perl.
+
+# Copyright (C) 1998-2001, 2003-2004, 2007, 2009-2021 Free Software Foundation,
+# Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_PERL],
+[
+  dnl FIXME: don't hard-code 5.005
+  AC_MSG_CHECKING([for perl5.005 or newer])
+  if test "${PERL+set}" = set; then
+    # 'PERL' is set in the user's environment.
+    candidate_perl_names="$PERL"
+    perl_specified=yes
+  else
+    candidate_perl_names='perl perl5'
+    perl_specified=no
+  fi
+
+  found=no
+  AC_SUBST([PERL])
+  PERL="$am_missing_run perl"
+  for perl in $candidate_perl_names; do
+    # Run test in a subshell; some versions of sh will print an error if
+    # an executable is not found, even if stderr is redirected.
+    if ( $perl -e 'require 5.005; use File::Compare; use warnings;' ) > /dev/null 2>&1; then
+      PERL=$perl
+      found=yes
+      break
+    fi
+  done
+
+  AC_MSG_RESULT([$found])
+  test $found = no && AC_MSG_WARN([
+WARNING: You don't seem to have perl5.005 or newer installed, or you lack
+         a usable version of the Perl File::Compare module.  As a result,
+         you may be unable to run a few tests or to regenerate certain
+         files if you modify the sources from which they are derived.
+] )
+])
diff --git a/src/grep/m4/perror.m4 b/src/grep/m4/perror.m4
new file mode 100644
index 0000000..9f2ac2d
--- /dev/null
+++ b/src/grep/m4/perror.m4
@@ -0,0 +1,71 @@
+# perror.m4 serial 9
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_PERROR],
+[
+  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+  AC_REQUIRE([gl_HEADER_ERRNO_H])
+  AC_REQUIRE([gl_FUNC_STRERROR_R])
+  AC_REQUIRE([gl_FUNC_STRERROR_0])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  dnl We intentionally do not check for the broader REPLACE_STRERROR_R,
+  dnl since on glibc systems, strerror_r is replaced only for signature
+  dnl issues, and perror is just fine.  Rather, we only want to
+  dnl replace perror if strerror_r was replaced for a content fix.
+  if test "$ERRNO_H:$REPLACE_STRERROR_0" != :0; then
+    dnl The system's perror() cannot know about the new errno values we add
+    dnl to <errno.h>, or any fix for strerror(0). Replace it.
+    REPLACE_PERROR=1
+  fi
+  case ${gl_cv_func_strerror_r_works-unset} in
+    unset|*yes)
+      AC_CACHE_CHECK([whether perror matches strerror],
+        [gl_cv_func_perror_works],
+        [AC_RUN_IFELSE(
+           [AC_LANG_PROGRAM(
+              [[#include <errno.h>
+                #include <stdio.h>
+                #include <stdlib.h>
+                #include <string.h>
+              ]],
+              [[char *str = strerror (-1);
+                if (!getenv("CONFTEST_OUTPUT")) return 0;
+                if (!str) str = "";
+                puts (str);
+                errno = -1;
+                perror ("");
+                return 0;
+              ]])],
+           [if CONFTEST_OUTPUT=1 ./conftest$EXEEXT >conftest.txt1 2>conftest.txt2 \
+               && cmp conftest.txt1 conftest.txt2 >/dev/null; then
+              gl_cv_func_perror_works=yes
+            else
+              gl_cv_func_perror_works=no
+            fi
+            rm -rf conftest.txt1 conftest.txt2],
+           [gl_cv_func_perror_works=no],
+           [case "$host_os" in
+                       # Guess yes on musl systems.
+              *-musl*) gl_cv_func_perror_works="guessing yes" ;;
+                       # Guess yes on native Windows.
+              mingw*)  gl_cv_func_perror_works="guessing yes" ;;
+                       # Otherwise obey --enable-cross-guesses.
+              *)       gl_cv_func_perror_works="$gl_cross_guess_normal" ;;
+            esac
+           ])
+        ])
+      case "$gl_cv_func_perror_works" in
+        *yes) ;;
+        *) REPLACE_PERROR=1 ;;
+      esac
+      ;;
+    *)
+      dnl The system's perror() probably inherits the bugs in the
+      dnl system's strerror_r(). Replace it.
+      REPLACE_PERROR=1
+      ;;
+  esac
+])
diff --git a/src/grep/m4/pipe.m4 b/src/grep/m4/pipe.m4
new file mode 100644
index 0000000..89d666d
--- /dev/null
+++ b/src/grep/m4/pipe.m4
@@ -0,0 +1,15 @@
+# pipe.m4 serial 2
+dnl Copyright (C) 2010-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_PIPE],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+
+  AC_CHECK_FUNCS_ONCE([pipe])
+  if test $ac_cv_func_pipe != yes; then
+    HAVE_PIPE=0
+  fi
+])
diff --git a/src/grep/m4/pkg.m4 b/src/grep/m4/pkg.m4
new file mode 100644
index 0000000..d8549a4
--- /dev/null
+++ b/src/grep/m4/pkg.m4
@@ -0,0 +1,343 @@
+# pkg.m4 - Macros to locate and utilise pkg-config.   -*- Autoconf -*-
+# serial 11 (pkg-config-0.29.1)
+
+dnl Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
+dnl Copyright © 2012-2015 Dan Nicholson <dbn.lists@gmail.com>
+dnl
+dnl This program is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 2 of the License, or
+dnl (at your option) any later version.
+dnl
+dnl This program is distributed in the hope that it will be useful, but
+dnl WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+dnl General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program; if not, write to the Free Software
+dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+dnl 02111-1307, USA.
+dnl
+dnl As a special exception to the GNU General Public License, if you
+dnl distribute this file as part of a program that contains a
+dnl configuration script generated by Autoconf, you may include it under
+dnl the same distribution terms that you use for the rest of that
+dnl program.
+
+dnl PKG_PREREQ(MIN-VERSION)
+dnl -----------------------
+dnl Since: 0.29
+dnl
+dnl Verify that the version of the pkg-config macros are at least
+dnl MIN-VERSION. Unlike PKG_PROG_PKG_CONFIG, which checks the user's
+dnl installed version of pkg-config, this checks the developer's version
+dnl of pkg.m4 when generating configure.
+dnl
+dnl To ensure that this macro is defined, also add:
+dnl m4_ifndef([PKG_PREREQ],
+dnl     [m4_fatal([must install pkg-config 0.29 or later before running autoconf/autogen])])
+dnl
+dnl See the "Since" comment for each macro you use to see what version
+dnl of the macros you require.
+m4_defun([PKG_PREREQ],
+[m4_define([PKG_MACROS_VERSION], [0.29.1])
+m4_if(m4_version_compare(PKG_MACROS_VERSION, [$1]), -1,
+    [m4_fatal([pkg.m4 version $1 or higher is required but ]PKG_MACROS_VERSION[ found])])
+])dnl PKG_PREREQ
+
+dnl PKG_PROG_PKG_CONFIG([MIN-VERSION])
+dnl ----------------------------------
+dnl Since: 0.16
+dnl
+dnl Search for the pkg-config tool and set the PKG_CONFIG variable to
+dnl first found in the path. Checks that the version of pkg-config found
+dnl is at least MIN-VERSION. If MIN-VERSION is not specified, 0.9.0 is
+dnl used since that's the first version where most current features of
+dnl pkg-config existed.
+AC_DEFUN([PKG_PROG_PKG_CONFIG],
+[m4_pattern_forbid([^_?PKG_[A-Z_]+$])
+m4_pattern_allow([^PKG_CONFIG(_(PATH|LIBDIR|SYSROOT_DIR|ALLOW_SYSTEM_(CFLAGS|LIBS)))?$])
+m4_pattern_allow([^PKG_CONFIG_(DISABLE_UNINSTALLED|TOP_BUILD_DIR|DEBUG_SPEW)$])
+AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])
+AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path])
+AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path])
+
+if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
+	AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
+fi
+if test -n "$PKG_CONFIG"; then
+	_pkg_min_version=m4_default([$1], [0.9.0])
+	AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
+	if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
+		AC_MSG_RESULT([yes])
+	else
+		AC_MSG_RESULT([no])
+		PKG_CONFIG=""
+	fi
+fi[]dnl
+])dnl PKG_PROG_PKG_CONFIG
+
+dnl PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+dnl -------------------------------------------------------------------
+dnl Since: 0.18
+dnl
+dnl Check to see whether a particular set of modules exists. Similar to
+dnl PKG_CHECK_MODULES(), but does not set variables or print errors.
+dnl
+dnl Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG])
+dnl only at the first occurence in configure.ac, so if the first place
+dnl it's called might be skipped (such as if it is within an "if", you
+dnl have to call PKG_CHECK_EXISTS manually
+AC_DEFUN([PKG_CHECK_EXISTS],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+if test -n "$PKG_CONFIG" && \
+    AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
+  m4_default([$2], [:])
+m4_ifvaln([$3], [else
+  $3])dnl
+fi])
+
+dnl _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
+dnl ---------------------------------------------
+dnl Internal wrapper calling pkg-config via PKG_CONFIG and setting
+dnl pkg_failed based on the result.
+m4_define([_PKG_CONFIG],
+[if test -n "$$1"; then
+    pkg_cv_[]$1="$$1"
+ elif test -n "$PKG_CONFIG"; then
+    PKG_CHECK_EXISTS([$3],
+                     [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes ],
+		     [pkg_failed=yes])
+ else
+    pkg_failed=untried
+fi[]dnl
+])dnl _PKG_CONFIG
+
+dnl _PKG_SHORT_ERRORS_SUPPORTED
+dnl ---------------------------
+dnl Internal check to see if pkg-config supports short errors.
+AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])
+if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
+        _pkg_short_errors_supported=yes
+else
+        _pkg_short_errors_supported=no
+fi[]dnl
+])dnl _PKG_SHORT_ERRORS_SUPPORTED
+
+
+dnl PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
+dnl   [ACTION-IF-NOT-FOUND])
+dnl --------------------------------------------------------------
+dnl Since: 0.4.0
+dnl
+dnl Note that if there is a possibility the first call to
+dnl PKG_CHECK_MODULES might not happen, you should be sure to include an
+dnl explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
+AC_DEFUN([PKG_CHECK_MODULES],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
+AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
+
+pkg_failed=no
+AC_MSG_CHECKING([for $1])
+
+_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
+_PKG_CONFIG([$1][_LIBS], [libs], [$2])
+
+m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
+and $1[]_LIBS to avoid the need to call pkg-config.
+See the pkg-config man page for more details.])
+
+if test $pkg_failed = yes; then
+   	AC_MSG_RESULT([no])
+        _PKG_SHORT_ERRORS_SUPPORTED
+        if test $_pkg_short_errors_supported = yes; then
+	        $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "$2" 2>&1`
+        else 
+	        $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "$2" 2>&1`
+        fi
+	# Put the nasty error message in config.log where it belongs
+	echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD
+
+	m4_default([$4], [AC_MSG_ERROR(
+[Package requirements ($2) were not met:
+
+$$1_PKG_ERRORS
+
+Consider adjusting the PKG_CONFIG_PATH environment variable if you
+installed software in a non-standard prefix.
+
+_PKG_TEXT])[]dnl
+        ])
+elif test $pkg_failed = untried; then
+     	AC_MSG_RESULT([no])
+	m4_default([$4], [AC_MSG_FAILURE(
+[The pkg-config script could not be found or is too old.  Make sure it
+is in your PATH or set the PKG_CONFIG environment variable to the full
+path to pkg-config.
+
+_PKG_TEXT
+
+To get pkg-config, see <http://pkg-config.freedesktop.org/>.])[]dnl
+        ])
+else
+	$1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
+	$1[]_LIBS=$pkg_cv_[]$1[]_LIBS
+        AC_MSG_RESULT([yes])
+	$3
+fi[]dnl
+])dnl PKG_CHECK_MODULES
+
+
+dnl PKG_CHECK_MODULES_STATIC(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
+dnl   [ACTION-IF-NOT-FOUND])
+dnl ---------------------------------------------------------------------
+dnl Since: 0.29
+dnl
+dnl Checks for existence of MODULES and gathers its build flags with
+dnl static libraries enabled. Sets VARIABLE-PREFIX_CFLAGS from --cflags
+dnl and VARIABLE-PREFIX_LIBS from --libs.
+dnl
+dnl Note that if there is a possibility the first call to
+dnl PKG_CHECK_MODULES_STATIC might not happen, you should be sure to
+dnl include an explicit call to PKG_PROG_PKG_CONFIG in your
+dnl configure.ac.
+AC_DEFUN([PKG_CHECK_MODULES_STATIC],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+_save_PKG_CONFIG=$PKG_CONFIG
+PKG_CONFIG="$PKG_CONFIG --static"
+PKG_CHECK_MODULES($@)
+PKG_CONFIG=$_save_PKG_CONFIG[]dnl
+])dnl PKG_CHECK_MODULES_STATIC
+
+
+dnl PKG_INSTALLDIR([DIRECTORY])
+dnl -------------------------
+dnl Since: 0.27
+dnl
+dnl Substitutes the variable pkgconfigdir as the location where a module
+dnl should install pkg-config .pc files. By default the directory is
+dnl $libdir/pkgconfig, but the default can be changed by passing
+dnl DIRECTORY. The user can override through the --with-pkgconfigdir
+dnl parameter.
+AC_DEFUN([PKG_INSTALLDIR],
+[m4_pushdef([pkg_default], [m4_default([$1], ['${libdir}/pkgconfig'])])
+m4_pushdef([pkg_description],
+    [pkg-config installation directory @<:@]pkg_default[@:>@])
+AC_ARG_WITH([pkgconfigdir],
+    [AS_HELP_STRING([--with-pkgconfigdir], pkg_description)],,
+    [with_pkgconfigdir=]pkg_default)
+AC_SUBST([pkgconfigdir], [$with_pkgconfigdir])
+m4_popdef([pkg_default])
+m4_popdef([pkg_description])
+])dnl PKG_INSTALLDIR
+
+
+dnl PKG_NOARCH_INSTALLDIR([DIRECTORY])
+dnl --------------------------------
+dnl Since: 0.27
+dnl
+dnl Substitutes the variable noarch_pkgconfigdir as the location where a
+dnl module should install arch-independent pkg-config .pc files. By
+dnl default the directory is $datadir/pkgconfig, but the default can be
+dnl changed by passing DIRECTORY. The user can override through the
+dnl --with-noarch-pkgconfigdir parameter.
+AC_DEFUN([PKG_NOARCH_INSTALLDIR],
+[m4_pushdef([pkg_default], [m4_default([$1], ['${datadir}/pkgconfig'])])
+m4_pushdef([pkg_description],
+    [pkg-config arch-independent installation directory @<:@]pkg_default[@:>@])
+AC_ARG_WITH([noarch-pkgconfigdir],
+    [AS_HELP_STRING([--with-noarch-pkgconfigdir], pkg_description)],,
+    [with_noarch_pkgconfigdir=]pkg_default)
+AC_SUBST([noarch_pkgconfigdir], [$with_noarch_pkgconfigdir])
+m4_popdef([pkg_default])
+m4_popdef([pkg_description])
+])dnl PKG_NOARCH_INSTALLDIR
+
+
+dnl PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE,
+dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+dnl -------------------------------------------
+dnl Since: 0.28
+dnl
+dnl Retrieves the value of the pkg-config variable for the given module.
+AC_DEFUN([PKG_CHECK_VAR],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl
+
+_PKG_CONFIG([$1], [variable="][$3]["], [$2])
+AS_VAR_COPY([$1], [pkg_cv_][$1])
+
+AS_VAR_IF([$1], [""], [$5], [$4])dnl
+])dnl PKG_CHECK_VAR
+
+dnl PKG_WITH_MODULES(VARIABLE-PREFIX, MODULES,
+dnl   [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND],
+dnl   [DESCRIPTION], [DEFAULT])
+dnl ------------------------------------------
+dnl
+dnl Prepare a "--with-" configure option using the lowercase
+dnl [VARIABLE-PREFIX] name, merging the behaviour of AC_ARG_WITH and
+dnl PKG_CHECK_MODULES in a single macro.
+AC_DEFUN([PKG_WITH_MODULES],
+[
+m4_pushdef([with_arg], m4_tolower([$1]))
+
+m4_pushdef([description],
+           [m4_default([$5], [build with ]with_arg[ support])])
+
+m4_pushdef([def_arg], [m4_default([$6], [auto])])
+m4_pushdef([def_action_if_found], [AS_TR_SH([with_]with_arg)=yes])
+m4_pushdef([def_action_if_not_found], [AS_TR_SH([with_]with_arg)=no])
+
+m4_case(def_arg,
+            [yes],[m4_pushdef([with_without], [--without-]with_arg)],
+            [m4_pushdef([with_without],[--with-]with_arg)])
+
+AC_ARG_WITH(with_arg,
+     AS_HELP_STRING(with_without, description[ @<:@default=]def_arg[@:>@]),,
+    [AS_TR_SH([with_]with_arg)=def_arg])
+
+AS_CASE([$AS_TR_SH([with_]with_arg)],
+            [yes],[PKG_CHECK_MODULES([$1],[$2],$3,$4)],
+            [auto],[PKG_CHECK_MODULES([$1],[$2],
+                                        [m4_n([def_action_if_found]) $3],
+                                        [m4_n([def_action_if_not_found]) $4])])
+
+m4_popdef([with_arg])
+m4_popdef([description])
+m4_popdef([def_arg])
+
+])dnl PKG_WITH_MODULES
+
+dnl PKG_HAVE_WITH_MODULES(VARIABLE-PREFIX, MODULES,
+dnl   [DESCRIPTION], [DEFAULT])
+dnl -----------------------------------------------
+dnl
+dnl Convenience macro to trigger AM_CONDITIONAL after PKG_WITH_MODULES
+dnl check._[VARIABLE-PREFIX] is exported as make variable.
+AC_DEFUN([PKG_HAVE_WITH_MODULES],
+[
+PKG_WITH_MODULES([$1],[$2],,,[$3],[$4])
+
+AM_CONDITIONAL([HAVE_][$1],
+               [test "$AS_TR_SH([with_]m4_tolower([$1]))" = "yes"])
+])dnl PKG_HAVE_WITH_MODULES
+
+dnl PKG_HAVE_DEFINE_WITH_MODULES(VARIABLE-PREFIX, MODULES,
+dnl   [DESCRIPTION], [DEFAULT])
+dnl ------------------------------------------------------
+dnl
+dnl Convenience macro to run AM_CONDITIONAL and AC_DEFINE after
+dnl PKG_WITH_MODULES check. HAVE_[VARIABLE-PREFIX] is exported as make
+dnl and preprocessor variable.
+AC_DEFUN([PKG_HAVE_DEFINE_WITH_MODULES],
+[
+PKG_HAVE_WITH_MODULES([$1],[$2],[$3],[$4])
+
+AS_IF([test "$AS_TR_SH([with_]m4_tolower([$1]))" = "yes"],
+        [AC_DEFINE([HAVE_][$1], 1, [Enable ]m4_tolower([$1])[ support])])
+])dnl PKG_HAVE_DEFINE_WITH_MODULES
diff --git a/src/grep/m4/po.m4 b/src/grep/m4/po.m4
new file mode 100644
index 0000000..f395723
--- /dev/null
+++ b/src/grep/m4/po.m4
@@ -0,0 +1,452 @@
+# po.m4 serial 20 (gettext-0.18.2)
+dnl Copyright (C) 1995-2013 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+dnl
+dnl This file can can be used in projects which are not available under
+dnl the GNU General Public License or the GNU Library General Public
+dnl License but which still want to provide support for the GNU gettext
+dnl functionality.
+dnl Please note that the actual code of the GNU gettext library is covered
+dnl by the GNU Library General Public License, and the rest of the GNU
+dnl gettext package package is covered by the GNU General Public License.
+dnl They are *not* in the public domain.
+
+dnl Authors:
+dnl   Ulrich Drepper <drepper@cygnus.com>, 1995-2000.
+dnl   Bruno Haible <haible@clisp.cons.org>, 2000-2003.
+
+AC_PREREQ([2.60])
+
+dnl Checks for all prerequisites of the po subdirectory.
+AC_DEFUN([AM_PO_SUBDIRS],
+[
+  AC_REQUIRE([AC_PROG_MAKE_SET])dnl
+  AC_REQUIRE([AC_PROG_INSTALL])dnl
+  AC_REQUIRE([AC_PROG_MKDIR_P])dnl
+  AC_REQUIRE([AM_NLS])dnl
+
+  dnl Release version of the gettext macros. This is used to ensure that
+  dnl the gettext macros and po/Makefile.in.in are in sync.
+  AC_SUBST([GETTEXT_MACRO_VERSION], [0.18])
+
+  dnl Perform the following tests also if --disable-nls has been given,
+  dnl because they are needed for "make dist" to work.
+
+  dnl Search for GNU msgfmt in the PATH.
+  dnl The first test excludes Solaris msgfmt and early GNU msgfmt versions.
+  dnl The second test excludes FreeBSD msgfmt.
+  AM_PATH_PROG_WITH_TEST(MSGFMT, msgfmt,
+    [$ac_dir/$ac_word --statistics /dev/null >&]AS_MESSAGE_LOG_FD[ 2>&1 &&
+     (if $ac_dir/$ac_word --statistics /dev/null 2>&1 >/dev/null | grep usage >/dev/null; then exit 1; else exit 0; fi)],
+    :)
+  AC_PATH_PROG([GMSGFMT], [gmsgfmt], [$MSGFMT])
+
+  dnl Test whether it is GNU msgfmt >= 0.15.
+changequote(,)dnl
+  case `$MSGFMT --version | sed 1q | sed -e 's,^[^0-9]*,,'` in
+    '' | 0.[0-9] | 0.[0-9].* | 0.1[0-4] | 0.1[0-4].*) MSGFMT_015=: ;;
+    *) MSGFMT_015=$MSGFMT ;;
+  esac
+changequote([,])dnl
+  AC_SUBST([MSGFMT_015])
+changequote(,)dnl
+  case `$GMSGFMT --version | sed 1q | sed -e 's,^[^0-9]*,,'` in
+    '' | 0.[0-9] | 0.[0-9].* | 0.1[0-4] | 0.1[0-4].*) GMSGFMT_015=: ;;
+    *) GMSGFMT_015=$GMSGFMT ;;
+  esac
+changequote([,])dnl
+  AC_SUBST([GMSGFMT_015])
+
+  dnl Search for GNU xgettext 0.12 or newer in the PATH.
+  dnl The first test excludes Solaris xgettext and early GNU xgettext versions.
+  dnl The second test excludes FreeBSD xgettext.
+  AM_PATH_PROG_WITH_TEST(XGETTEXT, xgettext,
+    [$ac_dir/$ac_word --omit-header --copyright-holder= --msgid-bugs-address= /dev/null >&]AS_MESSAGE_LOG_FD[ 2>&1 &&
+     (if $ac_dir/$ac_word --omit-header --copyright-holder= --msgid-bugs-address= /dev/null 2>&1 >/dev/null | grep usage >/dev/null; then exit 1; else exit 0; fi)],
+    :)
+  dnl Remove leftover from FreeBSD xgettext call.
+  rm -f messages.po
+
+  dnl Test whether it is GNU xgettext >= 0.15.
+changequote(,)dnl
+  case `$XGETTEXT --version | sed 1q | sed -e 's,^[^0-9]*,,'` in
+    '' | 0.[0-9] | 0.[0-9].* | 0.1[0-4] | 0.1[0-4].*) XGETTEXT_015=: ;;
+    *) XGETTEXT_015=$XGETTEXT ;;
+  esac
+changequote([,])dnl
+  AC_SUBST([XGETTEXT_015])
+
+  dnl Search for GNU msgmerge 0.11 or newer in the PATH.
+  AM_PATH_PROG_WITH_TEST(MSGMERGE, msgmerge,
+    [$ac_dir/$ac_word --update -q /dev/null /dev/null >&]AS_MESSAGE_LOG_FD[ 2>&1], :)
+
+  dnl Installation directories.
+  dnl Autoconf >= 2.60 defines localedir. For older versions of autoconf, we
+  dnl have to define it here, so that it can be used in po/Makefile.
+  test -n "$localedir" || localedir='${datadir}/locale'
+  AC_SUBST([localedir])
+
+  dnl Support for AM_XGETTEXT_OPTION.
+  test -n "${XGETTEXT_EXTRA_OPTIONS+set}" || XGETTEXT_EXTRA_OPTIONS=
+  AC_SUBST([XGETTEXT_EXTRA_OPTIONS])
+
+  AC_CONFIG_COMMANDS([po-directories], [[
+    for ac_file in $CONFIG_FILES; do
+      # Support "outfile[:infile[:infile...]]"
+      case "$ac_file" in
+        *:*) ac_file=`echo "$ac_file"|sed 's%:.*%%'` ;;
+      esac
+      # PO directories have a Makefile.in generated from Makefile.in.in.
+      case "$ac_file" in */Makefile.in)
+        # Adjust a relative srcdir.
+        ac_dir=`echo "$ac_file"|sed 's%/[^/][^/]*$%%'`
+        ac_dir_suffix=/`echo "$ac_dir"|sed 's%^\./%%'`
+        ac_dots=`echo "$ac_dir_suffix"|sed 's%/[^/]*%../%g'`
+        # In autoconf-2.13 it is called $ac_given_srcdir.
+        # In autoconf-2.50 it is called $srcdir.
+        test -n "$ac_given_srcdir" || ac_given_srcdir="$srcdir"
+        case "$ac_given_srcdir" in
+          .)  top_srcdir=`echo $ac_dots|sed 's%/$%%'` ;;
+          /*) top_srcdir="$ac_given_srcdir" ;;
+          *)  top_srcdir="$ac_dots$ac_given_srcdir" ;;
+        esac
+        # Treat a directory as a PO directory if and only if it has a
+        # POTFILES.in file. This allows packages to have multiple PO
+        # directories under different names or in different locations.
+        if test -f "$ac_given_srcdir/$ac_dir/POTFILES.in"; then
+          rm -f "$ac_dir/POTFILES"
+          test -n "$as_me" && echo "$as_me: creating $ac_dir/POTFILES" || echo "creating $ac_dir/POTFILES"
+          gt_tab=`printf '\t'`
+          cat "$ac_given_srcdir/$ac_dir/POTFILES.in" | sed -e "/^#/d" -e "/^[ ${gt_tab}]*\$/d" -e "s,.*,     $top_srcdir/& \\\\," | sed -e "\$s/\(.*\) \\\\/\1/" > "$ac_dir/POTFILES"
+          POMAKEFILEDEPS="POTFILES.in"
+          # ALL_LINGUAS, POFILES, UPDATEPOFILES, DUMMYPOFILES, GMOFILES depend
+          # on $ac_dir but don't depend on user-specified configuration
+          # parameters.
+          if test -f "$ac_given_srcdir/$ac_dir/LINGUAS"; then
+            # The LINGUAS file contains the set of available languages.
+            if test -n "$OBSOLETE_ALL_LINGUAS"; then
+              test -n "$as_me" && echo "$as_me: setting ALL_LINGUAS in configure.in is obsolete" || echo "setting ALL_LINGUAS in configure.in is obsolete"
+            fi
+            ALL_LINGUAS_=`sed -e "/^#/d" -e "s/#.*//" "$ac_given_srcdir/$ac_dir/LINGUAS"`
+            # Hide the ALL_LINGUAS assignment from automake < 1.5.
+            eval 'ALL_LINGUAS''=$ALL_LINGUAS_'
+            POMAKEFILEDEPS="$POMAKEFILEDEPS LINGUAS"
+          else
+            # The set of available languages was given in configure.in.
+            # Hide the ALL_LINGUAS assignment from automake < 1.5.
+            eval 'ALL_LINGUAS''=$OBSOLETE_ALL_LINGUAS'
+          fi
+          # Compute POFILES
+          # as      $(foreach lang, $(ALL_LINGUAS), $(srcdir)/$(lang).po)
+          # Compute UPDATEPOFILES
+          # as      $(foreach lang, $(ALL_LINGUAS), $(lang).po-update)
+          # Compute DUMMYPOFILES
+          # as      $(foreach lang, $(ALL_LINGUAS), $(lang).nop)
+          # Compute GMOFILES
+          # as      $(foreach lang, $(ALL_LINGUAS), $(srcdir)/$(lang).gmo)
+          case "$ac_given_srcdir" in
+            .) srcdirpre= ;;
+            *) srcdirpre='$(srcdir)/' ;;
+          esac
+          POFILES=
+          UPDATEPOFILES=
+          DUMMYPOFILES=
+          GMOFILES=
+          for lang in $ALL_LINGUAS; do
+            POFILES="$POFILES $srcdirpre$lang.po"
+            UPDATEPOFILES="$UPDATEPOFILES $lang.po-update"
+            DUMMYPOFILES="$DUMMYPOFILES $lang.nop"
+            GMOFILES="$GMOFILES $srcdirpre$lang.gmo"
+          done
+          # CATALOGS depends on both $ac_dir and the user's LINGUAS
+          # environment variable.
+          INST_LINGUAS=
+          if test -n "$ALL_LINGUAS"; then
+            for presentlang in $ALL_LINGUAS; do
+              useit=no
+              if test "%UNSET%" != "$LINGUAS"; then
+                desiredlanguages="$LINGUAS"
+              else
+                desiredlanguages="$ALL_LINGUAS"
+              fi
+              for desiredlang in $desiredlanguages; do
+                # Use the presentlang catalog if desiredlang is
+                #   a. equal to presentlang, or
+                #   b. a variant of presentlang (because in this case,
+                #      presentlang can be used as a fallback for messages
+                #      which are not translated in the desiredlang catalog).
+                case "$desiredlang" in
+                  "$presentlang"*) useit=yes;;
+                esac
+              done
+              if test $useit = yes; then
+                INST_LINGUAS="$INST_LINGUAS $presentlang"
+              fi
+            done
+          fi
+          CATALOGS=
+          if test -n "$INST_LINGUAS"; then
+            for lang in $INST_LINGUAS; do
+              CATALOGS="$CATALOGS $lang.gmo"
+            done
+          fi
+          test -n "$as_me" && echo "$as_me: creating $ac_dir/Makefile" || echo "creating $ac_dir/Makefile"
+          sed -e "/^POTFILES =/r $ac_dir/POTFILES" -e "/^# Makevars/r $ac_given_srcdir/$ac_dir/Makevars" -e "s|@POFILES@|$POFILES|g" -e "s|@UPDATEPOFILES@|$UPDATEPOFILES|g" -e "s|@DUMMYPOFILES@|$DUMMYPOFILES|g" -e "s|@GMOFILES@|$GMOFILES|g" -e "s|@CATALOGS@|$CATALOGS|g" -e "s|@POMAKEFILEDEPS@|$POMAKEFILEDEPS|g" "$ac_dir/Makefile.in" > "$ac_dir/Makefile"
+          for f in "$ac_given_srcdir/$ac_dir"/Rules-*; do
+            if test -f "$f"; then
+              case "$f" in
+                *.orig | *.bak | *~) ;;
+                *) cat "$f" >> "$ac_dir/Makefile" ;;
+              esac
+            fi
+          done
+        fi
+        ;;
+      esac
+    done]],
+   [# Capture the value of obsolete ALL_LINGUAS because we need it to compute
+    # POFILES, UPDATEPOFILES, DUMMYPOFILES, GMOFILES, CATALOGS. But hide it
+    # from automake < 1.5.
+    eval 'OBSOLETE_ALL_LINGUAS''="$ALL_LINGUAS"'
+    # Capture the value of LINGUAS because we need it to compute CATALOGS.
+    LINGUAS="${LINGUAS-%UNSET%}"
+   ])
+])
+
+dnl Postprocesses a Makefile in a directory containing PO files.
+AC_DEFUN([AM_POSTPROCESS_PO_MAKEFILE],
+[
+  # When this code is run, in config.status, two variables have already been
+  # set:
+  # - OBSOLETE_ALL_LINGUAS is the value of LINGUAS set in configure.in,
+  # - LINGUAS is the value of the environment variable LINGUAS at configure
+  #   time.
+
+changequote(,)dnl
+  # Adjust a relative srcdir.
+  ac_dir=`echo "$ac_file"|sed 's%/[^/][^/]*$%%'`
+  ac_dir_suffix=/`echo "$ac_dir"|sed 's%^\./%%'`
+  ac_dots=`echo "$ac_dir_suffix"|sed 's%/[^/]*%../%g'`
+  # In autoconf-2.13 it is called $ac_given_srcdir.
+  # In autoconf-2.50 it is called $srcdir.
+  test -n "$ac_given_srcdir" || ac_given_srcdir="$srcdir"
+  case "$ac_given_srcdir" in
+    .)  top_srcdir=`echo $ac_dots|sed 's%/$%%'` ;;
+    /*) top_srcdir="$ac_given_srcdir" ;;
+    *)  top_srcdir="$ac_dots$ac_given_srcdir" ;;
+  esac
+
+  # Find a way to echo strings without interpreting backslash.
+  if test "X`(echo '\t') 2>/dev/null`" = 'X\t'; then
+    gt_echo='echo'
+  else
+    if test "X`(printf '%s\n' '\t') 2>/dev/null`" = 'X\t'; then
+      gt_echo='printf %s\n'
+    else
+      echo_func () {
+        cat <<EOT
+$*
+EOT
+      }
+      gt_echo='echo_func'
+    fi
+  fi
+
+  # A sed script that extracts the value of VARIABLE from a Makefile.
+  tab=`printf '\t'`
+  sed_x_variable='
+# Test if the hold space is empty.
+x
+s/P/P/
+x
+ta
+# Yes it was empty. Look if we have the expected variable definition.
+/^['"${tab}"' ]*VARIABLE['"${tab}"' ]*=/{
+  # Seen the first line of the variable definition.
+  s/^['"${tab}"' ]*VARIABLE['"${tab}"' ]*=//
+  ba
+}
+bd
+:a
+# Here we are processing a line from the variable definition.
+# Remove comment, more precisely replace it with a space.
+s/#.*$/ /
+# See if the line ends in a backslash.
+tb
+:b
+s/\\$//
+# Print the line, without the trailing backslash.
+p
+tc
+# There was no trailing backslash. The end of the variable definition is
+# reached. Clear the hold space.
+s/^.*$//
+x
+bd
+:c
+# A trailing backslash means that the variable definition continues in the
+# next line. Put a nonempty string into the hold space to indicate this.
+s/^.*$/P/
+x
+:d
+'
+changequote([,])dnl
+
+  # Set POTFILES to the value of the Makefile variable POTFILES.
+  sed_x_POTFILES=`$gt_echo "$sed_x_variable" | sed -e '/^ *#/d' -e 's/VARIABLE/POTFILES/g'`
+  POTFILES=`sed -n -e "$sed_x_POTFILES" < "$ac_file"`
+  # Compute POTFILES_DEPS as
+  #   $(foreach file, $(POTFILES), $(top_srcdir)/$(file))
+  POTFILES_DEPS=
+  for file in $POTFILES; do
+    POTFILES_DEPS="$POTFILES_DEPS "'$(top_srcdir)/'"$file"
+  done
+  POMAKEFILEDEPS=""
+
+  if test -n "$OBSOLETE_ALL_LINGUAS"; then
+    test -n "$as_me" && echo "$as_me: setting ALL_LINGUAS in configure.in is obsolete" || echo "setting ALL_LINGUAS in configure.in is obsolete"
+  fi
+  if test -f "$ac_given_srcdir/$ac_dir/LINGUAS"; then
+    # The LINGUAS file contains the set of available languages.
+    ALL_LINGUAS_=`sed -e "/^#/d" -e "s/#.*//" "$ac_given_srcdir/$ac_dir/LINGUAS"`
+    POMAKEFILEDEPS="$POMAKEFILEDEPS LINGUAS"
+  else
+    # Set ALL_LINGUAS to the value of the Makefile variable LINGUAS.
+    sed_x_LINGUAS=`$gt_echo "$sed_x_variable" | sed -e '/^ *#/d' -e 's/VARIABLE/LINGUAS/g'`
+    ALL_LINGUAS_=`sed -n -e "$sed_x_LINGUAS" < "$ac_file"`
+  fi
+  # Hide the ALL_LINGUAS assignment from automake < 1.5.
+  eval 'ALL_LINGUAS''=$ALL_LINGUAS_'
+  # Compute POFILES
+  # as      $(foreach lang, $(ALL_LINGUAS), $(srcdir)/$(lang).po)
+  # Compute UPDATEPOFILES
+  # as      $(foreach lang, $(ALL_LINGUAS), $(lang).po-update)
+  # Compute DUMMYPOFILES
+  # as      $(foreach lang, $(ALL_LINGUAS), $(lang).nop)
+  # Compute GMOFILES
+  # as      $(foreach lang, $(ALL_LINGUAS), $(srcdir)/$(lang).gmo)
+  # Compute PROPERTIESFILES
+  # as      $(foreach lang, $(ALL_LINGUAS), $(top_srcdir)/$(DOMAIN)_$(lang).properties)
+  # Compute CLASSFILES
+  # as      $(foreach lang, $(ALL_LINGUAS), $(top_srcdir)/$(DOMAIN)_$(lang).class)
+  # Compute QMFILES
+  # as      $(foreach lang, $(ALL_LINGUAS), $(srcdir)/$(lang).qm)
+  # Compute MSGFILES
+  # as      $(foreach lang, $(ALL_LINGUAS), $(srcdir)/$(frob $(lang)).msg)
+  # Compute RESOURCESDLLFILES
+  # as      $(foreach lang, $(ALL_LINGUAS), $(srcdir)/$(frob $(lang))/$(DOMAIN).resources.dll)
+  case "$ac_given_srcdir" in
+    .) srcdirpre= ;;
+    *) srcdirpre='$(srcdir)/' ;;
+  esac
+  POFILES=
+  UPDATEPOFILES=
+  DUMMYPOFILES=
+  GMOFILES=
+  PROPERTIESFILES=
+  CLASSFILES=
+  QMFILES=
+  MSGFILES=
+  RESOURCESDLLFILES=
+  for lang in $ALL_LINGUAS; do
+    POFILES="$POFILES $srcdirpre$lang.po"
+    UPDATEPOFILES="$UPDATEPOFILES $lang.po-update"
+    DUMMYPOFILES="$DUMMYPOFILES $lang.nop"
+    GMOFILES="$GMOFILES $srcdirpre$lang.gmo"
+    PROPERTIESFILES="$PROPERTIESFILES \$(top_srcdir)/\$(DOMAIN)_$lang.properties"
+    CLASSFILES="$CLASSFILES \$(top_srcdir)/\$(DOMAIN)_$lang.class"
+    QMFILES="$QMFILES $srcdirpre$lang.qm"
+    frobbedlang=`echo $lang | sed -e 's/\..*$//' -e 'y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/'`
+    MSGFILES="$MSGFILES $srcdirpre$frobbedlang.msg"
+    frobbedlang=`echo $lang | sed -e 's/_/-/g' -e 's/^sr-CS/sr-SP/' -e 's/@latin$/-Latn/' -e 's/@cyrillic$/-Cyrl/' -e 's/^sr-SP$/sr-SP-Latn/' -e 's/^uz-UZ$/uz-UZ-Latn/'`
+    RESOURCESDLLFILES="$RESOURCESDLLFILES $srcdirpre$frobbedlang/\$(DOMAIN).resources.dll"
+  done
+  # CATALOGS depends on both $ac_dir and the user's LINGUAS
+  # environment variable.
+  INST_LINGUAS=
+  if test -n "$ALL_LINGUAS"; then
+    for presentlang in $ALL_LINGUAS; do
+      useit=no
+      if test "%UNSET%" != "$LINGUAS"; then
+        desiredlanguages="$LINGUAS"
+      else
+        desiredlanguages="$ALL_LINGUAS"
+      fi
+      for desiredlang in $desiredlanguages; do
+        # Use the presentlang catalog if desiredlang is
+        #   a. equal to presentlang, or
+        #   b. a variant of presentlang (because in this case,
+        #      presentlang can be used as a fallback for messages
+        #      which are not translated in the desiredlang catalog).
+        case "$desiredlang" in
+          "$presentlang"*) useit=yes;;
+        esac
+      done
+      if test $useit = yes; then
+        INST_LINGUAS="$INST_LINGUAS $presentlang"
+      fi
+    done
+  fi
+  CATALOGS=
+  JAVACATALOGS=
+  QTCATALOGS=
+  TCLCATALOGS=
+  CSHARPCATALOGS=
+  if test -n "$INST_LINGUAS"; then
+    for lang in $INST_LINGUAS; do
+      CATALOGS="$CATALOGS $lang.gmo"
+      JAVACATALOGS="$JAVACATALOGS \$(DOMAIN)_$lang.properties"
+      QTCATALOGS="$QTCATALOGS $lang.qm"
+      frobbedlang=`echo $lang | sed -e 's/\..*$//' -e 'y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/'`
+      TCLCATALOGS="$TCLCATALOGS $frobbedlang.msg"
+      frobbedlang=`echo $lang | sed -e 's/_/-/g' -e 's/^sr-CS/sr-SP/' -e 's/@latin$/-Latn/' -e 's/@cyrillic$/-Cyrl/' -e 's/^sr-SP$/sr-SP-Latn/' -e 's/^uz-UZ$/uz-UZ-Latn/'`
+      CSHARPCATALOGS="$CSHARPCATALOGS $frobbedlang/\$(DOMAIN).resources.dll"
+    done
+  fi
+
+  sed -e "s|@POTFILES_DEPS@|$POTFILES_DEPS|g" -e "s|@POFILES@|$POFILES|g" -e "s|@UPDATEPOFILES@|$UPDATEPOFILES|g" -e "s|@DUMMYPOFILES@|$DUMMYPOFILES|g" -e "s|@GMOFILES@|$GMOFILES|g" -e "s|@PROPERTIESFILES@|$PROPERTIESFILES|g" -e "s|@CLASSFILES@|$CLASSFILES|g" -e "s|@QMFILES@|$QMFILES|g" -e "s|@MSGFILES@|$MSGFILES|g" -e "s|@RESOURCESDLLFILES@|$RESOURCESDLLFILES|g" -e "s|@CATALOGS@|$CATALOGS|g" -e "s|@JAVACATALOGS@|$JAVACATALOGS|g" -e "s|@QTCATALOGS@|$QTCATALOGS|g" -e "s|@TCLCATALOGS@|$TCLCATALOGS|g" -e "s|@CSHARPCATALOGS@|$CSHARPCATALOGS|g" -e 's,^#distdir:,distdir:,' < "$ac_file" > "$ac_file.tmp"
+  tab=`printf '\t'`
+  if grep -l '@TCLCATALOGS@' "$ac_file" > /dev/null; then
+    # Add dependencies that cannot be formulated as a simple suffix rule.
+    for lang in $ALL_LINGUAS; do
+      frobbedlang=`echo $lang | sed -e 's/\..*$//' -e 'y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/'`
+      cat >> "$ac_file.tmp" <<EOF
+$frobbedlang.msg: $lang.po
+${tab}@echo "\$(MSGFMT) -c --tcl -d \$(srcdir) -l $lang $srcdirpre$lang.po"; \
+${tab}\$(MSGFMT) -c --tcl -d "\$(srcdir)" -l $lang $srcdirpre$lang.po || { rm -f "\$(srcdir)/$frobbedlang.msg"; exit 1; }
+EOF
+    done
+  fi
+  if grep -l '@CSHARPCATALOGS@' "$ac_file" > /dev/null; then
+    # Add dependencies that cannot be formulated as a simple suffix rule.
+    for lang in $ALL_LINGUAS; do
+      frobbedlang=`echo $lang | sed -e 's/_/-/g' -e 's/^sr-CS/sr-SP/' -e 's/@latin$/-Latn/' -e 's/@cyrillic$/-Cyrl/' -e 's/^sr-SP$/sr-SP-Latn/' -e 's/^uz-UZ$/uz-UZ-Latn/'`
+      cat >> "$ac_file.tmp" <<EOF
+$frobbedlang/\$(DOMAIN).resources.dll: $lang.po
+${tab}@echo "\$(MSGFMT) -c --csharp -d \$(srcdir) -l $lang $srcdirpre$lang.po -r \$(DOMAIN)"; \
+${tab}\$(MSGFMT) -c --csharp -d "\$(srcdir)" -l $lang $srcdirpre$lang.po -r "\$(DOMAIN)" || { rm -f "\$(srcdir)/$frobbedlang.msg"; exit 1; }
+EOF
+    done
+  fi
+  if test -n "$POMAKEFILEDEPS"; then
+    cat >> "$ac_file.tmp" <<EOF
+Makefile: $POMAKEFILEDEPS
+EOF
+  fi
+  mv "$ac_file.tmp" "$ac_file"
+])
+
+dnl Initializes the accumulator used by AM_XGETTEXT_OPTION.
+AC_DEFUN([AM_XGETTEXT_OPTION_INIT],
+[
+  XGETTEXT_EXTRA_OPTIONS=
+])
+
+dnl Registers an option to be passed to xgettext in the po subdirectory.
+AC_DEFUN([AM_XGETTEXT_OPTION],
+[
+  AC_REQUIRE([AM_XGETTEXT_OPTION_INIT])
+  XGETTEXT_EXTRA_OPTIONS="$XGETTEXT_EXTRA_OPTIONS $1"
+])
diff --git a/src/grep/m4/printf.m4 b/src/grep/m4/printf.m4
new file mode 100644
index 0000000..284c7c5
--- /dev/null
+++ b/src/grep/m4/printf.m4
@@ -0,0 +1,1728 @@
+# printf.m4 serial 73
+dnl Copyright (C) 2003, 2007-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Test whether the *printf family of functions supports the 'j', 'z', 't',
+dnl 'L' size specifiers. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_sizes_c99.
+
+AC_DEFUN([gl_PRINTF_SIZES_C99],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gl_AC_HEADER_STDINT_H])
+  AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports size specifiers as in C99],
+    [gl_cv_func_printf_sizes_c99],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#if HAVE_STDINT_H_WITH_UINTMAX
+# include <stdint.h>
+#endif
+#if HAVE_INTTYPES_H_WITH_UINTMAX
+# include <inttypes.h>
+#endif
+static char buf[100];
+int main ()
+{
+  int result = 0;
+#if HAVE_STDINT_H_WITH_UINTMAX || HAVE_INTTYPES_H_WITH_UINTMAX
+  buf[0] = '\0';
+  if (sprintf (buf, "%ju %d", (uintmax_t) 12345671, 33, 44, 55) < 0
+      || strcmp (buf, "12345671 33") != 0)
+    result |= 1;
+#else
+  result |= 1;
+#endif
+  buf[0] = '\0';
+  if (sprintf (buf, "%zu %d", (size_t) 12345672, 33, 44, 55) < 0
+      || strcmp (buf, "12345672 33") != 0)
+    result |= 2;
+  buf[0] = '\0';
+  if (sprintf (buf, "%tu %d", (ptrdiff_t) 12345673, 33, 44, 55) < 0
+      || strcmp (buf, "12345673 33") != 0)
+    result |= 4;
+  buf[0] = '\0';
+  if (sprintf (buf, "%Lg %d", (long double) 1.5, 33, 44, 55) < 0
+      || strcmp (buf, "1.5 33") != 0)
+    result |= 8;
+  return result;
+}]])],
+        [gl_cv_func_printf_sizes_c99=yes],
+        [gl_cv_func_printf_sizes_c99=no],
+        [
+         case "$host_os" in
+changequote(,)dnl
+                                 # Guess yes on glibc systems.
+           *-gnu* | gnu*)        gl_cv_func_printf_sizes_c99="guessing yes";;
+                                 # Guess yes on musl systems.
+           *-musl*)              gl_cv_func_printf_sizes_c99="guessing yes";;
+                                 # Guess yes on FreeBSD >= 5.
+           freebsd[1-4].*)       gl_cv_func_printf_sizes_c99="guessing no";;
+           freebsd* | kfreebsd*) gl_cv_func_printf_sizes_c99="guessing yes";;
+           midnightbsd*)         gl_cv_func_printf_sizes_c99="guessing yes";;
+                                 # Guess yes on Mac OS X >= 10.3.
+           darwin[1-6].*)        gl_cv_func_printf_sizes_c99="guessing no";;
+           darwin*)              gl_cv_func_printf_sizes_c99="guessing yes";;
+                                 # Guess yes on OpenBSD >= 3.9.
+           openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
+                                 gl_cv_func_printf_sizes_c99="guessing no";;
+           openbsd*)             gl_cv_func_printf_sizes_c99="guessing yes";;
+                                 # Guess yes on Solaris >= 2.10.
+           solaris2.[1-9][0-9]*) gl_cv_func_printf_sizes_c99="guessing yes";;
+           solaris*)             gl_cv_func_printf_sizes_c99="guessing no";;
+                                 # Guess yes on NetBSD >= 3.
+           netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                                 gl_cv_func_printf_sizes_c99="guessing no";;
+           netbsd*)              gl_cv_func_printf_sizes_c99="guessing yes";;
+                                 # Guess yes on Android.
+           linux*-android*)      gl_cv_func_printf_sizes_c99="guessing yes";;
+changequote([,])dnl
+                                 # Guess yes on MSVC, no on mingw.
+           mingw*)               AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                                   ],
+                                   [gl_cv_func_printf_sizes_c99="guessing yes"],
+                                   [gl_cv_func_printf_sizes_c99="guessing no"])
+                                 ;;
+                                 # If we don't know, obey --enable-cross-guesses.
+           *)                    gl_cv_func_printf_sizes_c99="$gl_cross_guess_normal";;
+         esac
+        ])
+    ])
+])
+
+dnl Test whether the *printf family of functions supports 'long double'
+dnl arguments together with the 'L' size specifier. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_long_double.
+
+AC_DEFUN([gl_PRINTF_LONG_DOUBLE],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports 'long double' arguments],
+    [gl_cv_func_printf_long_double],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <string.h>
+static char buf[10000];
+int main ()
+{
+  int result = 0;
+  buf[0] = '\0';
+  if (sprintf (buf, "%Lf %d", 1.75L, 33, 44, 55) < 0
+      || strcmp (buf, "1.750000 33") != 0)
+    result |= 1;
+  buf[0] = '\0';
+  if (sprintf (buf, "%Le %d", 1.75L, 33, 44, 55) < 0
+      || strcmp (buf, "1.750000e+00 33") != 0)
+    result |= 2;
+  buf[0] = '\0';
+  if (sprintf (buf, "%Lg %d", 1.75L, 33, 44, 55) < 0
+      || strcmp (buf, "1.75 33") != 0)
+    result |= 4;
+  return result;
+}]])],
+        [gl_cv_func_printf_long_double=yes],
+        [gl_cv_func_printf_long_double=no],
+        [case "$host_os" in
+                            # Guess no on BeOS.
+           beos*)           gl_cv_func_printf_long_double="guessing no";;
+                            # Guess yes on Android.
+           linux*-android*) gl_cv_func_printf_long_double="guessing yes";;
+                            # Guess yes on MSVC, no on mingw.
+           mingw*)          AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                              ],
+                              [gl_cv_func_printf_long_double="guessing yes"],
+                              [gl_cv_func_printf_long_double="guessing no"])
+                            ;;
+           *)               gl_cv_func_printf_long_double="guessing yes";;
+         esac
+        ])
+    ])
+])
+
+dnl Test whether the *printf family of functions supports infinite and NaN
+dnl 'double' arguments and negative zero arguments in the %f, %e, %g
+dnl directives. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_infinite.
+
+AC_DEFUN([gl_PRINTF_INFINITE],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports infinite 'double' arguments],
+    [gl_cv_func_printf_infinite],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <string.h>
+static int
+strisnan (const char *string, size_t start_index, size_t end_index)
+{
+  if (start_index < end_index)
+    {
+      if (string[start_index] == '-')
+        start_index++;
+      if (start_index + 3 <= end_index
+          && memcmp (string + start_index, "nan", 3) == 0)
+        {
+          start_index += 3;
+          if (start_index == end_index
+              || (string[start_index] == '(' && string[end_index - 1] == ')'))
+            return 1;
+        }
+    }
+  return 0;
+}
+static int
+have_minus_zero ()
+{
+  static double plus_zero = 0.0;
+  double minus_zero = - plus_zero;
+  return memcmp (&plus_zero, &minus_zero, sizeof (double)) != 0;
+}
+static char buf[10000];
+static double zero = 0.0;
+int main ()
+{
+  int result = 0;
+  if (sprintf (buf, "%f", 1.0 / zero) < 0
+      || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
+    result |= 1;
+  if (sprintf (buf, "%f", -1.0 / zero) < 0
+      || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+    result |= 1;
+  if (sprintf (buf, "%f", zero / zero) < 0
+      || !strisnan (buf, 0, strlen (buf)))
+    result |= 2;
+  if (sprintf (buf, "%e", 1.0 / zero) < 0
+      || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
+    result |= 4;
+  if (sprintf (buf, "%e", -1.0 / zero) < 0
+      || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+    result |= 4;
+  if (sprintf (buf, "%e", zero / zero) < 0
+      || !strisnan (buf, 0, strlen (buf)))
+    result |= 8;
+  if (sprintf (buf, "%g", 1.0 / zero) < 0
+      || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
+    result |= 16;
+  if (sprintf (buf, "%g", -1.0 / zero) < 0
+      || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+    result |= 16;
+  if (sprintf (buf, "%g", zero / zero) < 0
+      || !strisnan (buf, 0, strlen (buf)))
+    result |= 32;
+  /* This test fails on HP-UX 10.20.  */
+  if (have_minus_zero ())
+    if (sprintf (buf, "%g", - zero) < 0
+        || strcmp (buf, "-0") != 0)
+    result |= 64;
+  return result;
+}]])],
+        [gl_cv_func_printf_infinite=yes],
+        [gl_cv_func_printf_infinite=no],
+        [
+         case "$host_os" in
+changequote(,)dnl
+                                 # Guess yes on glibc systems.
+           *-gnu* | gnu*)        gl_cv_func_printf_infinite="guessing yes";;
+                                 # Guess yes on musl systems.
+           *-musl*)              gl_cv_func_printf_infinite="guessing yes";;
+                                 # Guess yes on FreeBSD >= 6.
+           freebsd[1-5].*)       gl_cv_func_printf_infinite="guessing no";;
+           freebsd* | kfreebsd*) gl_cv_func_printf_infinite="guessing yes";;
+           midnightbsd*)         gl_cv_func_printf_infinite="guessing yes";;
+                                 # Guess yes on Mac OS X >= 10.3.
+           darwin[1-6].*)        gl_cv_func_printf_infinite="guessing no";;
+           darwin*)              gl_cv_func_printf_infinite="guessing yes";;
+                                 # Guess yes on HP-UX >= 11.
+           hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite="guessing no";;
+           hpux*)                gl_cv_func_printf_infinite="guessing yes";;
+                                 # Guess yes on NetBSD >= 3.
+           netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                                 gl_cv_func_printf_infinite="guessing no";;
+           netbsd*)              gl_cv_func_printf_infinite="guessing yes";;
+                                 # Guess yes on OpenBSD >= 6.0.
+           openbsd[1-5].*)       gl_cv_func_printf_infinite="guessing no";;
+           openbsd*)             gl_cv_func_printf_infinite="guessing yes";;
+                                 # Guess yes on BeOS.
+           beos*)                gl_cv_func_printf_infinite="guessing yes";;
+                                 # Guess no on Android.
+           linux*-android*)      gl_cv_func_printf_infinite="guessing no";;
+changequote([,])dnl
+                                 # Guess yes on MSVC, no on mingw.
+           mingw*)               AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                                   ],
+                                   [gl_cv_func_printf_infinite="guessing yes"],
+                                   [gl_cv_func_printf_infinite="guessing no"])
+                                 ;;
+                                 # If we don't know, obey --enable-cross-guesses.
+           *)                    gl_cv_func_printf_infinite="$gl_cross_guess_normal";;
+         esac
+        ])
+    ])
+])
+
+dnl Test whether the *printf family of functions supports infinite and NaN
+dnl 'long double' arguments in the %f, %e, %g directives. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_infinite_long_double.
+
+AC_DEFUN([gl_PRINTF_INFINITE_LONG_DOUBLE],
+[
+  AC_REQUIRE([gl_PRINTF_LONG_DOUBLE])
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gl_BIGENDIAN])
+  AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  dnl The user can set or unset the variable gl_printf_safe to indicate
+  dnl that he wishes a safe handling of non-IEEE-754 'long double' values.
+  if test -n "$gl_printf_safe"; then
+    AC_DEFINE([CHECK_PRINTF_SAFE], [1],
+      [Define if you wish *printf() functions that have a safe handling of
+       non-IEEE-754 'long double' values.])
+  fi
+  case "$gl_cv_func_printf_long_double" in
+    *yes)
+      AC_CACHE_CHECK([whether printf supports infinite 'long double' arguments],
+        [gl_cv_func_printf_infinite_long_double],
+        [
+          AC_RUN_IFELSE(
+            [AC_LANG_SOURCE([[
+]GL_NOCRASH[
+#include <float.h>
+#include <stdio.h>
+#include <string.h>
+static int
+strisnan (const char *string, size_t start_index, size_t end_index)
+{
+  if (start_index < end_index)
+    {
+      if (string[start_index] == '-')
+        start_index++;
+      if (start_index + 3 <= end_index
+          && memcmp (string + start_index, "nan", 3) == 0)
+        {
+          start_index += 3;
+          if (start_index == end_index
+              || (string[start_index] == '(' && string[end_index - 1] == ')'))
+            return 1;
+        }
+    }
+  return 0;
+}
+static char buf[10000];
+static long double zeroL = 0.0L;
+int main ()
+{
+  int result = 0;
+  nocrash_init();
+  if (sprintf (buf, "%Lf", 1.0L / zeroL) < 0
+      || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
+    result |= 1;
+  if (sprintf (buf, "%Lf", -1.0L / zeroL) < 0
+      || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+    result |= 1;
+  if (sprintf (buf, "%Lf", zeroL / zeroL) < 0
+      || !strisnan (buf, 0, strlen (buf)))
+    result |= 1;
+  if (sprintf (buf, "%Le", 1.0L / zeroL) < 0
+      || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
+    result |= 1;
+  if (sprintf (buf, "%Le", -1.0L / zeroL) < 0
+      || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+    result |= 1;
+  if (sprintf (buf, "%Le", zeroL / zeroL) < 0
+      || !strisnan (buf, 0, strlen (buf)))
+    result |= 1;
+  if (sprintf (buf, "%Lg", 1.0L / zeroL) < 0
+      || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
+    result |= 1;
+  if (sprintf (buf, "%Lg", -1.0L / zeroL) < 0
+      || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+    result |= 1;
+  if (sprintf (buf, "%Lg", zeroL / zeroL) < 0
+      || !strisnan (buf, 0, strlen (buf)))
+    result |= 1;
+#if CHECK_PRINTF_SAFE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_)) && !HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
+/* Representation of an 80-bit 'long double' as an initializer for a sequence
+   of 'unsigned int' words.  */
+# ifdef WORDS_BIGENDIAN
+#  define LDBL80_WORDS(exponent,manthi,mantlo) \
+     { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \
+       ((unsigned int) (manthi) << 16) | ((unsigned int) (mantlo) >> 16),   \
+       (unsigned int) (mantlo) << 16                                        \
+     }
+# else
+#  define LDBL80_WORDS(exponent,manthi,mantlo) \
+     { mantlo, manthi, exponent }
+# endif
+  { /* Quiet NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
+    if (sprintf (buf, "%Lf", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      result |= 2;
+    if (sprintf (buf, "%Le", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      result |= 2;
+    if (sprintf (buf, "%Lg", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      result |= 2;
+  }
+  {
+    /* Signalling NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
+    if (sprintf (buf, "%Lf", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      result |= 2;
+    if (sprintf (buf, "%Le", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      result |= 2;
+    if (sprintf (buf, "%Lg", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      result |= 2;
+  }
+  { /* Pseudo-NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
+    if (sprintf (buf, "%Lf", x.value) <= 0)
+      result |= 4;
+    if (sprintf (buf, "%Le", x.value) <= 0)
+      result |= 4;
+    if (sprintf (buf, "%Lg", x.value) <= 0)
+      result |= 4;
+  }
+  { /* Pseudo-Infinity.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
+    if (sprintf (buf, "%Lf", x.value) <= 0)
+      result |= 8;
+    if (sprintf (buf, "%Le", x.value) <= 0)
+      result |= 8;
+    if (sprintf (buf, "%Lg", x.value) <= 0)
+      result |= 8;
+  }
+  { /* Pseudo-Zero.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
+    if (sprintf (buf, "%Lf", x.value) <= 0)
+      result |= 16;
+    if (sprintf (buf, "%Le", x.value) <= 0)
+      result |= 16;
+    if (sprintf (buf, "%Lg", x.value) <= 0)
+      result |= 16;
+  }
+  { /* Unnormalized number.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
+    if (sprintf (buf, "%Lf", x.value) <= 0)
+      result |= 32;
+    if (sprintf (buf, "%Le", x.value) <= 0)
+      result |= 32;
+    if (sprintf (buf, "%Lg", x.value) <= 0)
+      result |= 32;
+  }
+  { /* Pseudo-Denormal.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
+    if (sprintf (buf, "%Lf", x.value) <= 0)
+      result |= 64;
+    if (sprintf (buf, "%Le", x.value) <= 0)
+      result |= 64;
+    if (sprintf (buf, "%Lg", x.value) <= 0)
+      result |= 64;
+  }
+#endif
+  return result;
+}]])],
+            [gl_cv_func_printf_infinite_long_double=yes],
+            [gl_cv_func_printf_infinite_long_double=no],
+            [case "$host_cpu" in
+                                     # Guess no on ia64, x86_64, i386.
+               ia64 | x86_64 | i*86) gl_cv_func_printf_infinite_long_double="guessing no";;
+               *)
+                 case "$host_os" in
+changequote(,)dnl
+                                         # Guess yes on glibc systems.
+                   *-gnu* | gnu*)        gl_cv_func_printf_infinite_long_double="guessing yes";;
+                                         # Guess yes on musl systems.
+                   *-musl*)              gl_cv_func_printf_infinite_long_double="guessing yes";;
+                                         # Guess yes on FreeBSD >= 6.
+                   freebsd[1-5].*)       gl_cv_func_printf_infinite_long_double="guessing no";;
+                   freebsd* | kfreebsd*) gl_cv_func_printf_infinite_long_double="guessing yes";;
+                   midnightbsd*)         gl_cv_func_printf_infinite_long_double="guessing yes";;
+                                         # Guess yes on HP-UX >= 11.
+                   hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite_long_double="guessing no";;
+                   hpux*)                gl_cv_func_printf_infinite_long_double="guessing yes";;
+                                         # Guess yes on OpenBSD >= 6.0.
+                   openbsd[1-5].*)       gl_cv_func_printf_infinite_long_double="guessing no";;
+                   openbsd*)             gl_cv_func_printf_infinite_long_double="guessing yes";;
+                                         # Guess no on Android.
+                   linux*-android*)      gl_cv_func_printf_infinite_long_double="guessing no";;
+changequote([,])dnl
+                                         # Guess yes on MSVC, no on mingw.
+                   mingw*)               AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                                           ],
+                                           [gl_cv_func_printf_infinite_long_double="guessing yes"],
+                                           [gl_cv_func_printf_infinite_long_double="guessing no"])
+                                         ;;
+                                         # If we don't know, obey --enable-cross-guesses.
+                   *)                    gl_cv_func_printf_infinite_long_double="$gl_cross_guess_normal";;
+                 esac
+                 ;;
+             esac
+            ])
+        ])
+      ;;
+    *)
+      gl_cv_func_printf_infinite_long_double="irrelevant"
+      ;;
+  esac
+])
+
+dnl Test whether the *printf family of functions supports the 'a' and 'A'
+dnl conversion specifier for hexadecimal output of floating-point numbers.
+dnl (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_directive_a.
+
+AC_DEFUN([gl_PRINTF_DIRECTIVE_A],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports the 'a' and 'A' directives],
+    [gl_cv_func_printf_directive_a],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <string.h>
+static char buf[100];
+static double zero = 0.0;
+int main ()
+{
+  int result = 0;
+  if (sprintf (buf, "%a %d", 3.1416015625, 33, 44, 55) < 0
+      || (strcmp (buf, "0x1.922p+1 33") != 0
+          && strcmp (buf, "0x3.244p+0 33") != 0
+          && strcmp (buf, "0x6.488p-1 33") != 0
+          && strcmp (buf, "0xc.91p-2 33") != 0))
+    result |= 1;
+  if (sprintf (buf, "%A %d", -3.1416015625, 33, 44, 55) < 0
+      || (strcmp (buf, "-0X1.922P+1 33") != 0
+          && strcmp (buf, "-0X3.244P+0 33") != 0
+          && strcmp (buf, "-0X6.488P-1 33") != 0
+          && strcmp (buf, "-0XC.91P-2 33") != 0))
+    result |= 2;
+  /* This catches a FreeBSD 13.0 bug: it doesn't round.  */
+  if (sprintf (buf, "%.2a %d", 1.51, 33, 44, 55) < 0
+      || (strcmp (buf, "0x1.83p+0 33") != 0
+          && strcmp (buf, "0x3.05p-1 33") != 0
+          && strcmp (buf, "0x6.0ap-2 33") != 0
+          && strcmp (buf, "0xc.14p-3 33") != 0))
+    result |= 4;
+  /* This catches a Mac OS X 10.12.4 (Darwin 16.5) bug: it doesn't round.  */
+  if (sprintf (buf, "%.0a %d", 1.51, 33, 44, 55) < 0
+      || (strcmp (buf, "0x2p+0 33") != 0
+          && strcmp (buf, "0x3p-1 33") != 0
+          && strcmp (buf, "0x6p-2 33") != 0
+          && strcmp (buf, "0xcp-3 33") != 0))
+    result |= 4;
+  /* This catches a FreeBSD 6.1 bug.  See
+     <https://lists.gnu.org/r/bug-gnulib/2007-04/msg00107.html> */
+  if (sprintf (buf, "%010a %d", 1.0 / zero, 33, 44, 55) < 0
+      || buf[0] == '0')
+    result |= 8;
+  /* This catches a Mac OS X 10.3.9 (Darwin 7.9) bug.  */
+  if (sprintf (buf, "%.1a", 1.999) < 0
+      || (strcmp (buf, "0x1.0p+1") != 0
+          && strcmp (buf, "0x2.0p+0") != 0
+          && strcmp (buf, "0x4.0p-1") != 0
+          && strcmp (buf, "0x8.0p-2") != 0))
+    result |= 16;
+  /* This catches the same Mac OS X 10.3.9 (Darwin 7.9) bug and also a
+     glibc 2.4 bug <https://sourceware.org/bugzilla/show_bug.cgi?id=2908>.  */
+  if (sprintf (buf, "%.1La", 1.999L) < 0
+      || (strcmp (buf, "0x1.0p+1") != 0
+          && strcmp (buf, "0x2.0p+0") != 0
+          && strcmp (buf, "0x4.0p-1") != 0
+          && strcmp (buf, "0x8.0p-2") != 0))
+    result |= 32;
+  return result;
+}]])],
+        [gl_cv_func_printf_directive_a=yes],
+        [gl_cv_func_printf_directive_a=no],
+        [
+         case "$host_os" in
+                                 # Guess yes on glibc >= 2.5 systems.
+           *-gnu* | gnu*)
+             AC_EGREP_CPP([BZ2908], [
+               #include <features.h>
+               #ifdef __GNU_LIBRARY__
+                #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 5) || (__GLIBC__ > 2)) && !defined __UCLIBC__
+                 BZ2908
+                #endif
+               #endif
+               ],
+               [gl_cv_func_printf_directive_a="guessing yes"],
+               [gl_cv_func_printf_directive_a="guessing no"])
+             ;;
+                                 # Guess yes on musl systems.
+           *-musl*)              gl_cv_func_printf_directive_a="guessing yes";;
+                                 # Guess no on Android.
+           linux*-android*)      gl_cv_func_printf_directive_a="guessing no";;
+                                 # Guess no on native Windows.
+           mingw*)               gl_cv_func_printf_directive_a="guessing no";;
+                                 # If we don't know, obey --enable-cross-guesses.
+           *)                    gl_cv_func_printf_directive_a="$gl_cross_guess_normal";;
+         esac
+        ])
+    ])
+])
+
+dnl Test whether the *printf family of functions supports the %F format
+dnl directive. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_directive_f.
+
+AC_DEFUN([gl_PRINTF_DIRECTIVE_F],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports the 'F' directive],
+    [gl_cv_func_printf_directive_f],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <string.h>
+static char buf[100];
+static double zero = 0.0;
+int main ()
+{
+  int result = 0;
+  if (sprintf (buf, "%F %d", 1234567.0, 33, 44, 55) < 0
+      || strcmp (buf, "1234567.000000 33") != 0)
+    result |= 1;
+  if (sprintf (buf, "%F", 1.0 / zero) < 0
+      || (strcmp (buf, "INF") != 0 && strcmp (buf, "INFINITY") != 0))
+    result |= 2;
+  /* This catches a Cygwin 1.5.x bug.  */
+  if (sprintf (buf, "%.F", 1234.0) < 0
+      || strcmp (buf, "1234") != 0)
+    result |= 4;
+  return result;
+}]])],
+        [gl_cv_func_printf_directive_f=yes],
+        [gl_cv_func_printf_directive_f=no],
+        [
+         case "$host_os" in
+changequote(,)dnl
+                                 # Guess yes on glibc systems.
+           *-gnu* | gnu*)        gl_cv_func_printf_directive_f="guessing yes";;
+                                 # Guess yes on musl systems.
+           *-musl*)              gl_cv_func_printf_directive_f="guessing yes";;
+                                 # Guess yes on FreeBSD >= 6.
+           freebsd[1-5].*)       gl_cv_func_printf_directive_f="guessing no";;
+           freebsd* | kfreebsd*) gl_cv_func_printf_directive_f="guessing yes";;
+           midnightbsd*)         gl_cv_func_printf_directive_f="guessing yes";;
+                                 # Guess yes on Mac OS X >= 10.3.
+           darwin[1-6].*)        gl_cv_func_printf_directive_f="guessing no";;
+           darwin*)              gl_cv_func_printf_directive_f="guessing yes";;
+                                 # Guess yes on OpenBSD >= 6.0.
+           openbsd[1-5].*)       gl_cv_func_printf_directive_f="guessing no";;
+           openbsd*)             gl_cv_func_printf_directive_f="guessing yes";;
+                                 # Guess yes on Solaris >= 2.10.
+           solaris2.[1-9][0-9]*) gl_cv_func_printf_directive_f="guessing yes";;
+           solaris*)             gl_cv_func_printf_directive_f="guessing no";;
+                                 # Guess no on Android.
+           linux*-android*)      gl_cv_func_printf_directive_f="guessing no";;
+changequote([,])dnl
+                                 # Guess yes on MSVC, no on mingw.
+           mingw*)               AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                                   ],
+                                   [gl_cv_func_printf_directive_f="guessing yes"],
+                                   [gl_cv_func_printf_directive_f="guessing no"])
+                                 ;;
+                                 # If we don't know, obey --enable-cross-guesses.
+           *)                    gl_cv_func_printf_directive_f="$gl_cross_guess_normal";;
+         esac
+        ])
+    ])
+])
+
+dnl Test whether the *printf family of functions supports the %n format
+dnl directive. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_directive_n.
+
+AC_DEFUN([gl_PRINTF_DIRECTIVE_N],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports the 'n' directive],
+    [gl_cv_func_printf_directive_n],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef _MSC_VER
+#include <inttypes.h>
+/* See page about "Parameter Validation" on msdn.microsoft.com.
+   <https://docs.microsoft.com/en-us/cpp/c-runtime-library/parameter-validation>
+   <https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/set-invalid-parameter-handler-set-thread-local-invalid-parameter-handler>  */
+static void cdecl
+invalid_parameter_handler (const wchar_t *expression,
+                           const wchar_t *function,
+                           const wchar_t *file, unsigned int line,
+                           uintptr_t dummy)
+{
+  exit (1);
+}
+#endif
+static char fmtstring[10];
+static char buf[100];
+int main ()
+{
+  int count = -1;
+#ifdef _MSC_VER
+  _set_invalid_parameter_handler (invalid_parameter_handler);
+#endif
+  /* Copy the format string.  Some systems (glibc with _FORTIFY_SOURCE=2)
+     support %n in format strings in read-only memory but not in writable
+     memory.  */
+  strcpy (fmtstring, "%d %n");
+  if (sprintf (buf, fmtstring, 123, &count, 33, 44, 55) < 0
+      || strcmp (buf, "123 ") != 0
+      || count != 4)
+    return 1;
+  return 0;
+}]])],
+        [gl_cv_func_printf_directive_n=yes],
+        [gl_cv_func_printf_directive_n=no],
+        [case "$host_os" in
+                            # Guess no on glibc when _FORTIFY_SOURCE >= 2.
+           *-gnu* | gnu*)   AC_COMPILE_IFELSE(
+                              [AC_LANG_SOURCE(
+                                 [[#if _FORTIFY_SOURCE >= 2
+                                    error fail
+                                   #endif
+                                 ]])],
+                              [gl_cv_func_printf_directive_n="guessing yes"],
+                              [gl_cv_func_printf_directive_n="guessing no"])
+                            ;;
+                            # Guess no on Android.
+           linux*-android*) gl_cv_func_printf_directive_n="guessing no";;
+                            # Guess no on native Windows.
+           mingw*)          gl_cv_func_printf_directive_n="guessing no";;
+           *)               gl_cv_func_printf_directive_n="guessing yes";;
+         esac
+        ])
+    ])
+])
+
+dnl Test whether the *printf family of functions supports the %ls format
+dnl directive and in particular, when a precision is specified, whether
+dnl the functions stop converting the wide string argument when the number
+dnl of bytes that have been produced by this conversion equals or exceeds
+dnl the precision.
+dnl Result is gl_cv_func_printf_directive_ls.
+
+AC_DEFUN([gl_PRINTF_DIRECTIVE_LS],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports the 'ls' directive],
+    [gl_cv_func_printf_directive_ls],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <wchar.h>
+#include <string.h>
+int main ()
+{
+  int result = 0;
+  char buf[100];
+  /* Test whether %ls works at all.
+     This test fails on OpenBSD 4.0, IRIX 6.5, Solaris 2.6, Haiku, but not on
+     Cygwin 1.5.  */
+  {
+    static const wchar_t wstring[] = { 'a', 'b', 'c', 0 };
+    buf[0] = '\0';
+    if (sprintf (buf, "%ls", wstring) < 0
+        || strcmp (buf, "abc") != 0)
+      result |= 1;
+  }
+  /* This test fails on IRIX 6.5, Solaris 2.6, Cygwin 1.5, Haiku (with an
+     assertion failure inside libc), but not on OpenBSD 4.0.  */
+  {
+    static const wchar_t wstring[] = { 'a', 0 };
+    buf[0] = '\0';
+    if (sprintf (buf, "%ls", wstring) < 0
+        || strcmp (buf, "a") != 0)
+      result |= 2;
+  }
+  /* Test whether precisions in %ls are supported as specified in ISO C 99
+     section 7.19.6.1:
+       "If a precision is specified, no more than that many bytes are written
+        (including shift sequences, if any), and the array shall contain a
+        null wide character if, to equal the multibyte character sequence
+        length given by the precision, the function would need to access a
+        wide character one past the end of the array."
+     This test fails on Solaris 10.  */
+  {
+    static const wchar_t wstring[] = { 'a', 'b', (wchar_t) 0xfdfdfdfd, 0 };
+    buf[0] = '\0';
+    if (sprintf (buf, "%.2ls", wstring) < 0
+        || strcmp (buf, "ab") != 0)
+      result |= 8;
+  }
+  return result;
+}]])],
+        [gl_cv_func_printf_directive_ls=yes],
+        [gl_cv_func_printf_directive_ls=no],
+        [
+changequote(,)dnl
+         case "$host_os" in
+                            # Guess yes on OpenBSD >= 6.0.
+           openbsd[1-5].*)  gl_cv_func_printf_directive_ls="guessing no";;
+           openbsd*)        gl_cv_func_printf_directive_ls="guessing yes";;
+           irix*)           gl_cv_func_printf_directive_ls="guessing no";;
+           solaris*)        gl_cv_func_printf_directive_ls="guessing no";;
+           cygwin*)         gl_cv_func_printf_directive_ls="guessing no";;
+           beos* | haiku*)  gl_cv_func_printf_directive_ls="guessing no";;
+                            # Guess no on Android.
+           linux*-android*) gl_cv_func_printf_directive_ls="guessing no";;
+                            # Guess yes on native Windows.
+           mingw*)          gl_cv_func_printf_directive_ls="guessing yes";;
+           *)               gl_cv_func_printf_directive_ls="guessing yes";;
+         esac
+changequote([,])dnl
+        ])
+    ])
+])
+
+dnl Test whether the *printf family of functions supports POSIX/XSI format
+dnl strings with positions. (POSIX:2001)
+dnl Result is gl_cv_func_printf_positions.
+
+AC_DEFUN([gl_PRINTF_POSITIONS],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports POSIX/XSI format strings with positions],
+    [gl_cv_func_printf_positions],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <string.h>
+/* The string "%2$d %1$d", with dollar characters protected from the shell's
+   dollar expansion (possibly an autoconf bug).  */
+static char format[] = { '%', '2', '$', 'd', ' ', '%', '1', '$', 'd', '\0' };
+static char buf[100];
+int main ()
+{
+  sprintf (buf, format, 33, 55);
+  return (strcmp (buf, "55 33") != 0);
+}]])],
+        [gl_cv_func_printf_positions=yes],
+        [gl_cv_func_printf_positions=no],
+        [
+changequote(,)dnl
+         case "$host_os" in
+           netbsd[1-3]* | netbsdelf[1-3]* | netbsdaout[1-3]* | netbsdcoff[1-3]*)
+                            gl_cv_func_printf_positions="guessing no";;
+           beos*)           gl_cv_func_printf_positions="guessing no";;
+                            # Guess yes on Android.
+           linux*-android*) gl_cv_func_printf_positions="guessing yes";;
+                            # Guess no on native Windows.
+           mingw* | pw*)    gl_cv_func_printf_positions="guessing no";;
+           *)               gl_cv_func_printf_positions="guessing yes";;
+         esac
+changequote([,])dnl
+        ])
+    ])
+])
+
+dnl Test whether the *printf family of functions supports POSIX/XSI format
+dnl strings with the ' flag for grouping of decimal digits. (POSIX:2001)
+dnl Result is gl_cv_func_printf_flag_grouping.
+
+AC_DEFUN([gl_PRINTF_FLAG_GROUPING],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports the grouping flag],
+    [gl_cv_func_printf_flag_grouping],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <string.h>
+static char buf[100];
+int main ()
+{
+  if (sprintf (buf, "%'d %d", 1234567, 99) < 0
+      || buf[strlen (buf) - 1] != '9')
+    return 1;
+  return 0;
+}]])],
+        [gl_cv_func_printf_flag_grouping=yes],
+        [gl_cv_func_printf_flag_grouping=no],
+        [
+changequote(,)dnl
+         case "$host_os" in
+           cygwin*)         gl_cv_func_printf_flag_grouping="guessing no";;
+           netbsd*)         gl_cv_func_printf_flag_grouping="guessing no";;
+                            # Guess no on Android.
+           linux*-android*) gl_cv_func_printf_flag_grouping="guessing no";;
+                            # Guess no on native Windows.
+           mingw* | pw*)    gl_cv_func_printf_flag_grouping="guessing no";;
+           *)               gl_cv_func_printf_flag_grouping="guessing yes";;
+         esac
+changequote([,])dnl
+        ])
+    ])
+])
+
+dnl Test whether the *printf family of functions supports the - flag correctly.
+dnl (ISO C99.) See
+dnl <https://lists.gnu.org/r/bug-coreutils/2008-02/msg00035.html>
+dnl Result is gl_cv_func_printf_flag_leftadjust.
+
+AC_DEFUN([gl_PRINTF_FLAG_LEFTADJUST],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports the left-adjust flag correctly],
+    [gl_cv_func_printf_flag_leftadjust],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <string.h>
+static char buf[100];
+int main ()
+{
+  /* Check that a '-' flag is not annihilated by a negative width.  */
+  if (sprintf (buf, "a%-*sc", -3, "b") < 0
+      || strcmp (buf, "ab  c") != 0)
+    return 1;
+  return 0;
+}]])],
+        [gl_cv_func_printf_flag_leftadjust=yes],
+        [gl_cv_func_printf_flag_leftadjust=no],
+        [
+changequote(,)dnl
+         case "$host_os" in
+                            # Guess yes on HP-UX 11.
+           hpux11*)         gl_cv_func_printf_flag_leftadjust="guessing yes";;
+                            # Guess no on HP-UX 10 and older.
+           hpux*)           gl_cv_func_printf_flag_leftadjust="guessing no";;
+                            # Guess yes on Android.
+           linux*-android*) gl_cv_func_printf_flag_leftadjust="guessing yes";;
+                            # Guess yes on native Windows.
+           mingw*)          gl_cv_func_printf_flag_leftadjust="guessing yes";;
+                            # Guess yes otherwise.
+           *)               gl_cv_func_printf_flag_leftadjust="guessing yes";;
+         esac
+changequote([,])dnl
+        ])
+    ])
+])
+
+dnl Test whether the *printf family of functions supports padding of non-finite
+dnl values with the 0 flag correctly. (ISO C99 + TC1 + TC2.) See
+dnl <https://lists.gnu.org/r/bug-gnulib/2007-04/msg00107.html>
+dnl Result is gl_cv_func_printf_flag_zero.
+
+AC_DEFUN([gl_PRINTF_FLAG_ZERO],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports the zero flag correctly],
+    [gl_cv_func_printf_flag_zero],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <string.h>
+static char buf[100];
+static double zero = 0.0;
+int main ()
+{
+  if (sprintf (buf, "%010f", 1.0 / zero, 33, 44, 55) < 0
+      || (strcmp (buf, "       inf") != 0
+          && strcmp (buf, "  infinity") != 0))
+    return 1;
+  return 0;
+}]])],
+        [gl_cv_func_printf_flag_zero=yes],
+        [gl_cv_func_printf_flag_zero=no],
+        [
+changequote(,)dnl
+         case "$host_os" in
+                            # Guess yes on glibc systems.
+           *-gnu* | gnu*)   gl_cv_func_printf_flag_zero="guessing yes";;
+                            # Guess yes on musl systems.
+           *-musl*)         gl_cv_func_printf_flag_zero="guessing yes";;
+                            # Guess yes on BeOS.
+           beos*)           gl_cv_func_printf_flag_zero="guessing yes";;
+                            # Guess no on Android.
+           linux*-android*) gl_cv_func_printf_flag_zero="guessing no";;
+                            # Guess no on native Windows.
+           mingw*)          gl_cv_func_printf_flag_zero="guessing no";;
+                            # If we don't know, obey --enable-cross-guesses.
+           *)               gl_cv_func_printf_flag_zero="$gl_cross_guess_normal";;
+         esac
+changequote([,])dnl
+        ])
+    ])
+])
+
+dnl Test whether the *printf family of functions supports large precisions.
+dnl On mingw, precisions larger than 512 are treated like 512, in integer,
+dnl floating-point or pointer output. On Solaris 10/x86, precisions larger
+dnl than 510 in floating-point output crash the program. On Solaris 10/SPARC,
+dnl precisions larger than 510 in floating-point output yield wrong results.
+dnl On AIX 7.1, precisions larger than 998 in floating-point output yield
+dnl wrong results. On BeOS, precisions larger than 1044 crash the program.
+dnl Result is gl_cv_func_printf_precision.
+
+AC_DEFUN([gl_PRINTF_PRECISION],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf supports large precisions],
+    [gl_cv_func_printf_precision],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <string.h>
+static char buf[5000];
+int main ()
+{
+  int result = 0;
+#ifdef __BEOS__
+  /* On BeOS, this would crash and show a dialog box.  Avoid the crash.  */
+  return 1;
+#endif
+  if (sprintf (buf, "%.4000d %d", 1, 33, 44) < 4000 + 3)
+    result |= 1;
+  if (sprintf (buf, "%.4000f %d", 1.0, 33, 44) < 4000 + 5)
+    result |= 2;
+  if (sprintf (buf, "%.511f %d", 1.0, 33, 44) < 511 + 5
+      || buf[0] != '1')
+    result |= 4;
+  if (sprintf (buf, "%.999f %d", 1.0, 33, 44) < 999 + 5
+      || buf[0] != '1')
+    result |= 4;
+  return result;
+}]])],
+        [gl_cv_func_printf_precision=yes],
+        [gl_cv_func_printf_precision=no],
+        [
+changequote(,)dnl
+         case "$host_os" in
+           # Guess no only on Solaris, native Windows, and BeOS systems.
+           solaris*)        gl_cv_func_printf_precision="guessing no" ;;
+           mingw* | pw*)    gl_cv_func_printf_precision="guessing no" ;;
+           beos*)           gl_cv_func_printf_precision="guessing no" ;;
+                            # Guess yes on Android.
+           linux*-android*) gl_cv_func_printf_precision="guessing yes" ;;
+           *)               gl_cv_func_printf_precision="guessing yes" ;;
+         esac
+changequote([,])dnl
+        ])
+    ])
+])
+
+dnl Test whether the *printf family of functions recovers gracefully in case
+dnl of an out-of-memory condition, or whether it crashes the entire program.
+dnl Result is gl_cv_func_printf_enomem.
+
+AC_DEFUN([gl_PRINTF_ENOMEM],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([gl_MULTIARCH])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether printf survives out-of-memory conditions],
+    [gl_cv_func_printf_enomem],
+    [
+      gl_cv_func_printf_enomem="guessing no"
+      if test "$cross_compiling" = no; then
+        if test $APPLE_UNIVERSAL_BUILD = 0; then
+          AC_LANG_CONFTEST([AC_LANG_SOURCE([[
+]GL_NOCRASH[
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <errno.h>
+int main()
+{
+  struct rlimit limit;
+  int ret;
+  nocrash_init ();
+  /* Some printf implementations allocate temporary space with malloc.  */
+  /* On BSD systems, malloc() is limited by RLIMIT_DATA.  */
+#ifdef RLIMIT_DATA
+  if (getrlimit (RLIMIT_DATA, &limit) < 0)
+    return 77;
+  if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
+    limit.rlim_max = 5000000;
+  limit.rlim_cur = limit.rlim_max;
+  if (setrlimit (RLIMIT_DATA, &limit) < 0)
+    return 77;
+#endif
+  /* On Linux systems, malloc() is limited by RLIMIT_AS.  */
+#ifdef RLIMIT_AS
+  if (getrlimit (RLIMIT_AS, &limit) < 0)
+    return 77;
+  if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
+    limit.rlim_max = 5000000;
+  limit.rlim_cur = limit.rlim_max;
+  if (setrlimit (RLIMIT_AS, &limit) < 0)
+    return 77;
+#endif
+  /* Some printf implementations allocate temporary space on the stack.  */
+#ifdef RLIMIT_STACK
+  if (getrlimit (RLIMIT_STACK, &limit) < 0)
+    return 77;
+  if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
+    limit.rlim_max = 5000000;
+  limit.rlim_cur = limit.rlim_max;
+  if (setrlimit (RLIMIT_STACK, &limit) < 0)
+    return 77;
+#endif
+  ret = printf ("%.5000000f", 1.0);
+  return !(ret == 5000002 || (ret < 0 && errno == ENOMEM));
+}
+          ]])])
+          if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
+            (./conftest 2>&AS_MESSAGE_LOG_FD
+             result=$?
+             _AS_ECHO_LOG([\$? = $result])
+             if test $result != 0 && test $result != 77; then result=1; fi
+             exit $result
+            ) >/dev/null 2>/dev/null
+            case $? in
+              0) gl_cv_func_printf_enomem="yes" ;;
+              77) gl_cv_func_printf_enomem="guessing no" ;;
+              *) gl_cv_func_printf_enomem="no" ;;
+            esac
+          else
+            gl_cv_func_printf_enomem="guessing no"
+          fi
+          rm -fr conftest*
+        else
+          dnl A universal build on Apple Mac OS X platforms.
+          dnl The result would be 'no' in 32-bit mode and 'yes' in 64-bit mode.
+          dnl But we need a configuration result that is valid in both modes.
+          gl_cv_func_printf_enomem="guessing no"
+        fi
+      fi
+      if test "$gl_cv_func_printf_enomem" = "guessing no"; then
+changequote(,)dnl
+        case "$host_os" in
+                           # Guess yes on glibc systems.
+          *-gnu* | gnu*)   gl_cv_func_printf_enomem="guessing yes";;
+                           # Guess yes on Solaris.
+          solaris*)        gl_cv_func_printf_enomem="guessing yes";;
+                           # Guess yes on AIX.
+          aix*)            gl_cv_func_printf_enomem="guessing yes";;
+                           # Guess yes on HP-UX/hppa.
+          hpux*)           case "$host_cpu" in
+                             hppa*) gl_cv_func_printf_enomem="guessing yes";;
+                             *)     gl_cv_func_printf_enomem="guessing no";;
+                           esac
+                           ;;
+                           # Guess yes on IRIX.
+          irix*)           gl_cv_func_printf_enomem="guessing yes";;
+                           # Guess yes on OSF/1.
+          osf*)            gl_cv_func_printf_enomem="guessing yes";;
+                           # Guess yes on BeOS.
+          beos*)           gl_cv_func_printf_enomem="guessing yes";;
+                           # Guess yes on Haiku.
+          haiku*)          gl_cv_func_printf_enomem="guessing yes";;
+                           # Guess no on Android.
+          linux*-android*) gl_cv_func_printf_enomem="guessing no";;
+                           # If we don't know, obey --enable-cross-guesses.
+          *)               gl_cv_func_printf_enomem="$gl_cross_guess_normal";;
+        esac
+changequote([,])dnl
+      fi
+    ])
+])
+
+dnl Test whether the snprintf function exists. (ISO C99, POSIX:2001)
+dnl Result is ac_cv_func_snprintf.
+
+AC_DEFUN([gl_SNPRINTF_PRESENCE],
+[
+  AC_CHECK_FUNCS_ONCE([snprintf])
+])
+
+dnl Test whether the string produced by the snprintf function is always NUL
+dnl terminated. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_snprintf_truncation_c99.
+
+AC_DEFUN_ONCE([gl_SNPRINTF_TRUNCATION_C99],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_REQUIRE([gl_SNPRINTF_PRESENCE])
+  AC_CACHE_CHECK([whether snprintf truncates the result as in C99],
+    [gl_cv_func_snprintf_truncation_c99],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <string.h>
+#if HAVE_SNPRINTF
+# define my_snprintf snprintf
+#else
+# include <stdarg.h>
+static int my_snprintf (char *buf, int size, const char *format, ...)
+{
+  va_list args;
+  int ret;
+  va_start (args, format);
+  ret = vsnprintf (buf, size, format, args);
+  va_end (args);
+  return ret;
+}
+#endif
+static char buf[100];
+int main ()
+{
+  strcpy (buf, "ABCDEF");
+  my_snprintf (buf, 3, "%d %d", 4567, 89);
+  if (memcmp (buf, "45\0DEF", 6) != 0)
+    return 1;
+  return 0;
+}]])],
+        [gl_cv_func_snprintf_truncation_c99=yes],
+        [gl_cv_func_snprintf_truncation_c99=no],
+        [
+changequote(,)dnl
+         case "$host_os" in
+                                 # Guess yes on glibc systems.
+           *-gnu* | gnu*)        gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on musl systems.
+           *-musl*)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on FreeBSD >= 5.
+           freebsd[1-4].*)       gl_cv_func_snprintf_truncation_c99="guessing no";;
+           freebsd* | kfreebsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
+           midnightbsd*)         gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on Mac OS X >= 10.3.
+           darwin[1-6].*)        gl_cv_func_snprintf_truncation_c99="guessing no";;
+           darwin*)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on OpenBSD >= 3.9.
+           openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
+                                 gl_cv_func_snprintf_truncation_c99="guessing no";;
+           openbsd*)             gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on Solaris >= 2.6.
+           solaris2.[0-5] | solaris2.[0-5].*)
+                                 gl_cv_func_snprintf_truncation_c99="guessing no";;
+           solaris*)             gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on AIX >= 4.
+           aix[1-3]*)            gl_cv_func_snprintf_truncation_c99="guessing no";;
+           aix*)                 gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on HP-UX >= 11.
+           hpux[7-9]* | hpux10*) gl_cv_func_snprintf_truncation_c99="guessing no";;
+           hpux*)                gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on IRIX >= 6.5.
+           irix6.5)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on OSF/1 >= 5.
+           osf[3-4]*)            gl_cv_func_snprintf_truncation_c99="guessing no";;
+           osf*)                 gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on NetBSD >= 3.
+           netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                                 gl_cv_func_snprintf_truncation_c99="guessing no";;
+           netbsd*)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on BeOS.
+           beos*)                gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess yes on Android.
+           linux*-android*)      gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                                 # Guess no on native Windows.
+           mingw*)               gl_cv_func_snprintf_truncation_c99="guessing no";;
+                                 # If we don't know, obey --enable-cross-guesses.
+           *)                    gl_cv_func_snprintf_truncation_c99="$gl_cross_guess_normal";;
+         esac
+changequote([,])dnl
+        ])
+    ])
+])
+
+dnl Test whether the return value of the snprintf function is the number
+dnl of bytes (excluding the terminating NUL) that would have been produced
+dnl if the buffer had been large enough. (ISO C99, POSIX:2001)
+dnl For example, this test program fails on IRIX 6.5:
+dnl     ---------------------------------------------------------------------
+dnl     #include <stdio.h>
+dnl     int main()
+dnl     {
+dnl       static char buf[8];
+dnl       int retval = snprintf (buf, 3, "%d", 12345);
+dnl       return retval >= 0 && retval < 3;
+dnl     }
+dnl     ---------------------------------------------------------------------
+dnl Result is gl_cv_func_snprintf_retval_c99.
+
+AC_DEFUN_ONCE([gl_SNPRINTF_RETVAL_C99],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_REQUIRE([gl_SNPRINTF_PRESENCE])
+  AC_CACHE_CHECK([whether snprintf returns a byte count as in C99],
+    [gl_cv_func_snprintf_retval_c99],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <string.h>
+#if HAVE_SNPRINTF
+# define my_snprintf snprintf
+#else
+# include <stdarg.h>
+static int my_snprintf (char *buf, int size, const char *format, ...)
+{
+  va_list args;
+  int ret;
+  va_start (args, format);
+  ret = vsnprintf (buf, size, format, args);
+  va_end (args);
+  return ret;
+}
+#endif
+static char buf[100];
+int main ()
+{
+  strcpy (buf, "ABCDEF");
+  if (my_snprintf (buf, 3, "%d %d", 4567, 89) != 7)
+    return 1;
+  if (my_snprintf (buf, 0, "%d %d", 4567, 89) != 7)
+    return 2;
+  if (my_snprintf (NULL, 0, "%d %d", 4567, 89) != 7)
+    return 3;
+  return 0;
+}]])],
+        [gl_cv_func_snprintf_retval_c99=yes],
+        [gl_cv_func_snprintf_retval_c99=no],
+        [case "$host_os" in
+changequote(,)dnl
+                                 # Guess yes on glibc systems.
+           *-gnu* | gnu*)        gl_cv_func_snprintf_retval_c99="guessing yes";;
+                                 # Guess yes on musl systems.
+           *-musl*)              gl_cv_func_snprintf_retval_c99="guessing yes";;
+                                 # Guess yes on FreeBSD >= 5.
+           freebsd[1-4].*)       gl_cv_func_snprintf_retval_c99="guessing no";;
+           freebsd* | kfreebsd*) gl_cv_func_snprintf_retval_c99="guessing yes";;
+           midnightbsd*)         gl_cv_func_snprintf_retval_c99="guessing yes";;
+                                 # Guess yes on Mac OS X >= 10.3.
+           darwin[1-6].*)        gl_cv_func_snprintf_retval_c99="guessing no";;
+           darwin*)              gl_cv_func_snprintf_retval_c99="guessing yes";;
+                                 # Guess yes on OpenBSD >= 3.9.
+           openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
+                                 gl_cv_func_snprintf_retval_c99="guessing no";;
+           openbsd*)             gl_cv_func_snprintf_retval_c99="guessing yes";;
+                                 # Guess yes on Solaris >= 2.10.
+           solaris2.[1-9][0-9]*) gl_cv_func_printf_sizes_c99="guessing yes";;
+           solaris*)             gl_cv_func_printf_sizes_c99="guessing no";;
+                                 # Guess yes on AIX >= 4.
+           aix[1-3]*)            gl_cv_func_snprintf_retval_c99="guessing no";;
+           aix*)                 gl_cv_func_snprintf_retval_c99="guessing yes";;
+                                 # Guess yes on NetBSD >= 3.
+           netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                                 gl_cv_func_snprintf_retval_c99="guessing no";;
+           netbsd*)              gl_cv_func_snprintf_retval_c99="guessing yes";;
+                                 # Guess yes on BeOS.
+           beos*)                gl_cv_func_snprintf_retval_c99="guessing yes";;
+                                 # Guess yes on Android.
+           linux*-android*)      gl_cv_func_snprintf_retval_c99="guessing yes";;
+changequote([,])dnl
+                                 # Guess yes on MSVC, no on mingw.
+           mingw*)               AC_EGREP_CPP([Known], [
+#ifdef _MSC_VER
+ Known
+#endif
+                                   ],
+                                   [gl_cv_func_snprintf_retval_c99="guessing yes"],
+                                   [gl_cv_func_snprintf_retval_c99="guessing no"])
+                                 ;;
+                                 # If we don't know, obey --enable-cross-guesses.
+           *)                    gl_cv_func_snprintf_retval_c99="$gl_cross_guess_normal";;
+         esac
+        ])
+    ])
+])
+
+dnl Test whether the snprintf function supports the %n format directive
+dnl also in truncated portions of the format string. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_snprintf_directive_n.
+
+AC_DEFUN([gl_SNPRINTF_DIRECTIVE_N],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_REQUIRE([gl_SNPRINTF_PRESENCE])
+  AC_CACHE_CHECK([whether snprintf fully supports the 'n' directive],
+    [gl_cv_func_snprintf_directive_n],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <string.h>
+#if HAVE_SNPRINTF
+# define my_snprintf snprintf
+#else
+# include <stdarg.h>
+static int my_snprintf (char *buf, int size, const char *format, ...)
+{
+  va_list args;
+  int ret;
+  va_start (args, format);
+  ret = vsnprintf (buf, size, format, args);
+  va_end (args);
+  return ret;
+}
+#endif
+static char fmtstring[10];
+static char buf[100];
+int main ()
+{
+  int count = -1;
+  /* Copy the format string.  Some systems (glibc with _FORTIFY_SOURCE=2)
+     support %n in format strings in read-only memory but not in writable
+     memory.  */
+  strcpy (fmtstring, "%d %n");
+  my_snprintf (buf, 4, fmtstring, 12345, &count, 33, 44, 55);
+  if (count != 6)
+    return 1;
+  return 0;
+}]])],
+        [gl_cv_func_snprintf_directive_n=yes],
+        [gl_cv_func_snprintf_directive_n=no],
+        [
+         case "$host_os" in
+                                 # Guess no on glibc when _FORTIFY_SOURCE >= 2.
+           *-gnu* | gnu*)        AC_COMPILE_IFELSE(
+                                   [AC_LANG_SOURCE(
+                                      [[#if _FORTIFY_SOURCE >= 2
+                                         error fail
+                                        #endif
+                                      ]])],
+                                   [gl_cv_func_snprintf_directive_n="guessing yes"],
+                                   [gl_cv_func_snprintf_directive_n="guessing no"])
+                                 ;;
+changequote(,)dnl
+                                 # Guess yes on musl systems.
+           *-musl*)              gl_cv_func_snprintf_directive_n="guessing yes";;
+                                 # Guess yes on FreeBSD >= 5.
+           freebsd[1-4].*)       gl_cv_func_snprintf_directive_n="guessing no";;
+           freebsd* | kfreebsd*) gl_cv_func_snprintf_directive_n="guessing yes";;
+           midnightbsd*)         gl_cv_func_snprintf_directive_n="guessing yes";;
+                                 # Guess yes on Mac OS X >= 10.3.
+           darwin[1-6].*)        gl_cv_func_snprintf_directive_n="guessing no";;
+           darwin*)              gl_cv_func_snprintf_directive_n="guessing yes";;
+                                 # Guess yes on Solaris >= 2.6.
+           solaris2.[0-5] | solaris2.[0-5].*)
+                                 gl_cv_func_snprintf_directive_n="guessing no";;
+           solaris*)             gl_cv_func_snprintf_directive_n="guessing yes";;
+                                 # Guess yes on AIX >= 4.
+           aix[1-3]*)            gl_cv_func_snprintf_directive_n="guessing no";;
+           aix*)                 gl_cv_func_snprintf_directive_n="guessing yes";;
+                                 # Guess yes on IRIX >= 6.5.
+           irix6.5)              gl_cv_func_snprintf_directive_n="guessing yes";;
+                                 # Guess yes on OSF/1 >= 5.
+           osf[3-4]*)            gl_cv_func_snprintf_directive_n="guessing no";;
+           osf*)                 gl_cv_func_snprintf_directive_n="guessing yes";;
+                                 # Guess yes on NetBSD >= 3.
+           netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                                 gl_cv_func_snprintf_directive_n="guessing no";;
+           netbsd*)              gl_cv_func_snprintf_directive_n="guessing yes";;
+                                 # Guess yes on BeOS.
+           beos*)                gl_cv_func_snprintf_directive_n="guessing yes";;
+                                 # Guess no on Android.
+           linux*-android*)      gl_cv_func_snprintf_directive_n="guessing no";;
+                                 # Guess no on native Windows.
+           mingw*)               gl_cv_func_snprintf_directive_n="guessing no";;
+                                 # If we don't know, obey --enable-cross-guesses.
+           *)                    gl_cv_func_snprintf_directive_n="$gl_cross_guess_normal";;
+changequote([,])dnl
+         esac
+        ])
+    ])
+])
+
+dnl Test whether the snprintf function, when passed a size = 1, writes any
+dnl output without bounds in this case, behaving like sprintf. This is the
+dnl case on Linux libc5.
+dnl Result is gl_cv_func_snprintf_size1.
+
+AC_DEFUN([gl_SNPRINTF_SIZE1],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_REQUIRE([gl_SNPRINTF_PRESENCE])
+  AC_CACHE_CHECK([whether snprintf respects a size of 1],
+    [gl_cv_func_snprintf_size1],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <stdio.h>
+#if HAVE_SNPRINTF
+# define my_snprintf snprintf
+#else
+# include <stdarg.h>
+static int my_snprintf (char *buf, int size, const char *format, ...)
+{
+  va_list args;
+  int ret;
+  va_start (args, format);
+  ret = vsnprintf (buf, size, format, args);
+  va_end (args);
+  return ret;
+}
+#endif
+int main()
+{
+  static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' };
+  my_snprintf (buf, 1, "%d", 12345);
+  return buf[1] != 'E';
+}]])],
+        [gl_cv_func_snprintf_size1=yes],
+        [gl_cv_func_snprintf_size1=no],
+        [case "$host_os" in
+                            # Guess yes on Android.
+           linux*-android*) gl_cv_func_snprintf_size1="guessing yes" ;;
+                            # Guess yes on native Windows.
+           mingw*)          gl_cv_func_snprintf_size1="guessing yes" ;;
+           *)               gl_cv_func_snprintf_size1="guessing yes" ;;
+         esac
+        ])
+    ])
+])
+
+dnl Test whether the vsnprintf function, when passed a zero size, produces no
+dnl output. (ISO C99, POSIX:2001)
+dnl For example, snprintf nevertheless writes a NUL byte in this case
+dnl on OSF/1 5.1:
+dnl     ---------------------------------------------------------------------
+dnl     #include <stdio.h>
+dnl     int main()
+dnl     {
+dnl       static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' };
+dnl       snprintf (buf, 0, "%d", 12345);
+dnl       return buf[0] != 'D';
+dnl     }
+dnl     ---------------------------------------------------------------------
+dnl And vsnprintf writes any output without bounds in this case, behaving like
+dnl vsprintf, on HP-UX 11 and OSF/1 5.1:
+dnl     ---------------------------------------------------------------------
+dnl     #include <stdarg.h>
+dnl     #include <stdio.h>
+dnl     static int my_snprintf (char *buf, int size, const char *format, ...)
+dnl     {
+dnl       va_list args;
+dnl       int ret;
+dnl       va_start (args, format);
+dnl       ret = vsnprintf (buf, size, format, args);
+dnl       va_end (args);
+dnl       return ret;
+dnl     }
+dnl     int main()
+dnl     {
+dnl       static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' };
+dnl       my_snprintf (buf, 0, "%d", 12345);
+dnl       return buf[0] != 'D';
+dnl     }
+dnl     ---------------------------------------------------------------------
+dnl Result is gl_cv_func_vsnprintf_zerosize_c99.
+
+AC_DEFUN([gl_VSNPRINTF_ZEROSIZE_C99],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether vsnprintf respects a zero size as in C99],
+    [gl_cv_func_vsnprintf_zerosize_c99],
+    [
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <stdarg.h>
+#include <stdio.h>
+static int my_snprintf (char *buf, int size, const char *format, ...)
+{
+  va_list args;
+  int ret;
+  va_start (args, format);
+  ret = vsnprintf (buf, size, format, args);
+  va_end (args);
+  return ret;
+}
+int main()
+{
+  static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' };
+  my_snprintf (buf, 0, "%d", 12345);
+  return buf[0] != 'D';
+}]])],
+        [gl_cv_func_vsnprintf_zerosize_c99=yes],
+        [gl_cv_func_vsnprintf_zerosize_c99=no],
+        [
+changequote(,)dnl
+         case "$host_os" in
+                                 # Guess yes on glibc systems.
+           *-gnu* | gnu*)        gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                                 # Guess yes on musl systems.
+           *-musl*)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                                 # Guess yes on FreeBSD >= 5.
+           freebsd[1-4].*)       gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+           freebsd* | kfreebsd*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+           midnightbsd*)         gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                                 # Guess yes on Mac OS X >= 10.3.
+           darwin[1-6].*)        gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+           darwin*)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                                 # Guess yes on Cygwin.
+           cygwin*)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                                 # Guess yes on Solaris >= 2.6.
+           solaris2.[0-5] | solaris2.[0-5].*)
+                                 gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+           solaris*)             gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                                 # Guess yes on AIX >= 4.
+           aix[1-3]*)            gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+           aix*)                 gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                                 # Guess yes on IRIX >= 6.5.
+           irix6.5)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                                 # Guess yes on NetBSD >= 3.
+           netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                                 gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+           netbsd*)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                                 # Guess yes on BeOS.
+           beos*)                gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                                 # Guess yes on Android.
+           linux*-android*)      gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                                 # Guess yes on native Windows.
+           mingw* | pw*)         gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                                 # If we don't know, obey --enable-cross-guesses.
+           *)                    gl_cv_func_vsnprintf_zerosize_c99="$gl_cross_guess_normal";;
+         esac
+changequote([,])dnl
+        ])
+    ])
+])
+
+dnl The results of these tests on various platforms are:
+dnl
+dnl 1 = gl_PRINTF_SIZES_C99
+dnl 2 = gl_PRINTF_LONG_DOUBLE
+dnl 3 = gl_PRINTF_INFINITE
+dnl 4 = gl_PRINTF_INFINITE_LONG_DOUBLE
+dnl 5 = gl_PRINTF_DIRECTIVE_A
+dnl 6 = gl_PRINTF_DIRECTIVE_F
+dnl 7 = gl_PRINTF_DIRECTIVE_N
+dnl 8 = gl_PRINTF_DIRECTIVE_LS
+dnl 9 = gl_PRINTF_POSITIONS
+dnl 10 = gl_PRINTF_FLAG_GROUPING
+dnl 11 = gl_PRINTF_FLAG_LEFTADJUST
+dnl 12 = gl_PRINTF_FLAG_ZERO
+dnl 13 = gl_PRINTF_PRECISION
+dnl 14 = gl_PRINTF_ENOMEM
+dnl 15 = gl_SNPRINTF_PRESENCE
+dnl 16 = gl_SNPRINTF_TRUNCATION_C99
+dnl 17 = gl_SNPRINTF_RETVAL_C99
+dnl 18 = gl_SNPRINTF_DIRECTIVE_N
+dnl 19 = gl_SNPRINTF_SIZE1
+dnl 20 = gl_VSNPRINTF_ZEROSIZE_C99
+dnl
+dnl 1 = checking whether printf supports size specifiers as in C99...
+dnl 2 = checking whether printf supports 'long double' arguments...
+dnl 3 = checking whether printf supports infinite 'double' arguments...
+dnl 4 = checking whether printf supports infinite 'long double' arguments...
+dnl 5 = checking whether printf supports the 'a' and 'A' directives...
+dnl 6 = checking whether printf supports the 'F' directive...
+dnl 7 = checking whether printf supports the 'n' directive...
+dnl 8 = checking whether printf supports the 'ls' directive...
+dnl 9 = checking whether printf supports POSIX/XSI format strings with positions...
+dnl 10 = checking whether printf supports the grouping flag...
+dnl 11 = checking whether printf supports the left-adjust flag correctly...
+dnl 12 = checking whether printf supports the zero flag correctly...
+dnl 13 = checking whether printf supports large precisions...
+dnl 14 = checking whether printf survives out-of-memory conditions...
+dnl 15 = checking for snprintf...
+dnl 16 = checking whether snprintf truncates the result as in C99...
+dnl 17 = checking whether snprintf returns a byte count as in C99...
+dnl 18 = checking whether snprintf fully supports the 'n' directive...
+dnl 19 = checking whether snprintf respects a size of 1...
+dnl 20 = checking whether vsnprintf respects a zero size as in C99...
+dnl
+dnl . = yes, # = no.
+dnl
+dnl                                  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20
+dnl   glibc 2.5                      .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .
+dnl   glibc 2.3.6                    .  .  .  .  #  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .
+dnl   FreeBSD 13.0                   .  .  .  .  #  .  .  .  .  .  .  .  .  #  .  .  .  .  .  .
+dnl   FreeBSD 5.4, 6.1               .  .  .  .  #  .  .  .  .  .  .  #  .  #  .  .  .  .  .  .
+dnl   Mac OS X 10.13.5               .  .  .  #  #  .  #  .  .  .  .  .  .  .  .  .  .  #  .  .
+dnl   Mac OS X 10.5.8                .  .  .  #  #  .  .  .  .  .  .  #  .  .  .  .  .  .  .  .
+dnl   Mac OS X 10.3.9                .  .  .  .  #  .  .  .  .  .  .  #  .  #  .  .  .  .  .  .
+dnl   OpenBSD 6.0, 6.7               .  .  .  .  #  .  .  .  .  .  .  .  .  #  .  .  .  .  .  .
+dnl   OpenBSD 3.9, 4.0               .  .  #  #  #  #  .  #  .  #  .  #  .  #  .  .  .  .  .  .
+dnl   Cygwin 1.7.0 (2009)            .  .  .  #  .  .  .  ?  .  .  .  .  .  ?  .  .  .  .  .  .
+dnl   Cygwin 1.5.25 (2008)           .  .  .  #  #  .  .  #  .  .  .  .  .  #  .  .  .  .  .  .
+dnl   Cygwin 1.5.19 (2006)           #  .  .  #  #  #  .  #  .  #  .  #  #  #  .  .  .  .  .  .
+dnl   Solaris 11.4                   .  .  #  #  #  .  .  #  .  .  .  #  .  .  .  .  .  .  .  .
+dnl   Solaris 11.3                   .  .  .  .  #  .  .  #  .  .  .  .  .  .  .  .  .  .  .  .
+dnl   Solaris 11.0                   .  .  #  #  #  .  .  #  .  .  .  #  .  .  .  .  .  .  .  .
+dnl   Solaris 10                     .  .  #  #  #  .  .  #  .  .  .  #  #  .  .  .  .  .  .  .
+dnl   Solaris 2.6 ... 9              #  .  #  #  #  #  .  #  .  .  .  #  #  .  .  .  #  .  .  .
+dnl   Solaris 2.5.1                  #  .  #  #  #  #  .  #  .  .  .  #  .  .  #  #  #  #  #  #
+dnl   AIX 7.1                        .  .  #  #  #  .  .  .  .  .  .  #  #  .  .  .  .  .  .  .
+dnl   AIX 5.2                        .  .  #  #  #  .  .  .  .  .  .  #  .  .  .  .  .  .  .  .
+dnl   AIX 4.3.2, 5.1                 #  .  #  #  #  #  .  .  .  .  .  #  .  .  .  .  #  .  .  .
+dnl   HP-UX 11.31                    .  .  .  .  #  .  .  .  .  .  .  #  .  .  .  .  #  #  .  .
+dnl   HP-UX 11.{00,11,23}            #  .  .  .  #  #  .  .  .  .  .  #  .  .  .  .  #  #  .  #
+dnl   HP-UX 10.20                    #  .  #  .  #  #  .  ?  .  .  #  #  .  .  .  .  #  #  ?  #
+dnl   IRIX 6.5                       #  .  #  #  #  #  .  #  .  .  .  #  .  .  .  .  #  .  .  .
+dnl   OSF/1 5.1                      #  .  #  #  #  #  .  .  .  .  .  #  .  .  .  .  #  .  .  #
+dnl   OSF/1 4.0d                     #  .  #  #  #  #  .  .  .  .  .  #  .  .  #  #  #  #  #  #
+dnl   NetBSD 9.0                     .  .  .  .  #  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .
+dnl   NetBSD 5.0                     .  .  .  #  #  .  .  .  .  .  .  #  .  #  .  .  .  .  .  .
+dnl   NetBSD 4.0                     .  ?  ?  ?  ?  ?  .  ?  .  ?  ?  ?  ?  ?  .  .  .  ?  ?  ?
+dnl   NetBSD 3.0                     .  .  .  .  #  #  .  ?  #  #  ?  #  .  #  .  .  .  .  .  .
+dnl   Haiku                          .  .  .  #  #  #  .  #  .  .  .  .  .  ?  .  .  ?  .  .  .
+dnl   BeOS                           #  #  .  #  #  #  .  ?  #  .  ?  .  #  ?  .  .  ?  .  .  .
+dnl   Android 4.3                    .  .  #  #  #  #  #  #  .  #  .  #  .  #  .  .  .  #  .  .
+dnl   old mingw / msvcrt             #  #  #  #  #  #  .  .  #  #  .  #  #  ?  .  #  #  #  .  .
+dnl   MSVC 9                         #  #  #  #  #  #  #  .  #  #  .  #  #  ?  #  #  #  #  .  .
+dnl   mingw 2009-2011                .  #  .  #  .  .  .  .  #  #  .  .  .  ?  .  .  .  .  .  .
+dnl   mingw-w64 2011                 #  #  #  #  #  #  .  .  #  #  .  #  #  ?  .  #  #  #  .  .
diff --git a/src/grep/m4/progtest.m4 b/src/grep/m4/progtest.m4
new file mode 100644
index 0000000..7b39123
--- /dev/null
+++ b/src/grep/m4/progtest.m4
@@ -0,0 +1,91 @@
+# progtest.m4 serial 7 (gettext-0.18.2)
+dnl Copyright (C) 1996-2003, 2005, 2008-2013 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+dnl
+dnl This file can can be used in projects which are not available under
+dnl the GNU General Public License or the GNU Library General Public
+dnl License but which still want to provide support for the GNU gettext
+dnl functionality.
+dnl Please note that the actual code of the GNU gettext library is covered
+dnl by the GNU Library General Public License, and the rest of the GNU
+dnl gettext package package is covered by the GNU General Public License.
+dnl They are *not* in the public domain.
+
+dnl Authors:
+dnl   Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+AC_PREREQ([2.50])
+
+# Search path for a program which passes the given test.
+
+dnl AM_PATH_PROG_WITH_TEST(VARIABLE, PROG-TO-CHECK-FOR,
+dnl   TEST-PERFORMED-ON-FOUND_PROGRAM [, VALUE-IF-NOT-FOUND [, PATH]])
+AC_DEFUN([AM_PATH_PROG_WITH_TEST],
+[
+# Prepare PATH_SEPARATOR.
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+  # Determine PATH_SEPARATOR by trying to find /bin/sh in a PATH which
+  # contains only /bin. Note that ksh looks also at the FPATH variable,
+  # so we have to set that as well for the test.
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+    && { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+           || PATH_SEPARATOR=';'
+       }
+fi
+
+# Find out how to test for executable files. Don't use a zero-byte file,
+# as systems may use methods other than mode bits to determine executability.
+cat >conf$$.file <<_ASEOF
+#! /bin/sh
+exit 0
+_ASEOF
+chmod +x conf$$.file
+if test -x conf$$.file >/dev/null 2>&1; then
+  ac_executable_p="test -x"
+else
+  ac_executable_p="test -f"
+fi
+rm -f conf$$.file
+
+# Extract the first word of "$2", so it can be a program name with args.
+set dummy $2; ac_word=[$]2
+AC_MSG_CHECKING([for $ac_word])
+AC_CACHE_VAL([ac_cv_path_$1],
+[case "[$]$1" in
+  [[\\/]]* | ?:[[\\/]]*)
+    ac_cv_path_$1="[$]$1" # Let the user override the test with a path.
+    ;;
+  *)
+    ac_save_IFS="$IFS"; IFS=$PATH_SEPARATOR
+    for ac_dir in ifelse([$5], , $PATH, [$5]); do
+      IFS="$ac_save_IFS"
+      test -z "$ac_dir" && ac_dir=.
+      for ac_exec_ext in '' $ac_executable_extensions; do
+        if $ac_executable_p "$ac_dir/$ac_word$ac_exec_ext"; then
+          echo "$as_me: trying $ac_dir/$ac_word..." >&AS_MESSAGE_LOG_FD
+          if [$3]; then
+            ac_cv_path_$1="$ac_dir/$ac_word$ac_exec_ext"
+            break 2
+          fi
+        fi
+      done
+    done
+    IFS="$ac_save_IFS"
+dnl If no 4th arg is given, leave the cache variable unset,
+dnl so AC_PATH_PROGS will keep looking.
+ifelse([$4], , , [  test -z "[$]ac_cv_path_$1" && ac_cv_path_$1="$4"
+])dnl
+    ;;
+esac])dnl
+$1="$ac_cv_path_$1"
+if test ifelse([$4], , [-n "[$]$1"], ["[$]$1" != "$4"]); then
+  AC_MSG_RESULT([$][$1])
+else
+  AC_MSG_RESULT([no])
+fi
+AC_SUBST([$1])dnl
+])
diff --git a/src/grep/m4/pthread-thread.m4 b/src/grep/m4/pthread-thread.m4
new file mode 100644
index 0000000..949186d
--- /dev/null
+++ b/src/grep/m4/pthread-thread.m4
@@ -0,0 +1,69 @@
+# pthread-thread.m4 serial 2
+dnl Copyright (C) 2019-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_PTHREAD_THREAD],
+[
+  AC_REQUIRE([gl_PTHREAD_H])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+
+  if { case "$host_os" in mingw*) true;; *) false;; esac; } \
+     && test $gl_threads_api = windows; then
+    dnl Choose function names that don't conflict with the mingw-w64 winpthreads
+    dnl library.
+    REPLACE_PTHREAD_CREATE=1
+    REPLACE_PTHREAD_ATTR_INIT=1
+    REPLACE_PTHREAD_ATTR_GETDETACHSTATE=1
+    REPLACE_PTHREAD_ATTR_SETDETACHSTATE=1
+    REPLACE_PTHREAD_ATTR_DESTROY=1
+    REPLACE_PTHREAD_SELF=1
+    REPLACE_PTHREAD_EQUAL=1
+    REPLACE_PTHREAD_DETACH=1
+    REPLACE_PTHREAD_JOIN=1
+    REPLACE_PTHREAD_EXIT=1
+  else
+    if test $HAVE_PTHREAD_H = 0; then
+      HAVE_PTHREAD_CREATE=0
+      HAVE_PTHREAD_ATTR_INIT=0
+      HAVE_PTHREAD_ATTR_GETDETACHSTATE=0
+      HAVE_PTHREAD_ATTR_SETDETACHSTATE=0
+      HAVE_PTHREAD_ATTR_DESTROY=0
+      HAVE_PTHREAD_SELF=0
+      HAVE_PTHREAD_EQUAL=0
+      HAVE_PTHREAD_DETACH=0
+      HAVE_PTHREAD_JOIN=0
+      HAVE_PTHREAD_EXIT=0
+    else
+      dnl On HP-UX 11.11, pthread_create() and pthread_attr_init() are only
+      dnl defined as inline functions.
+      AC_CACHE_CHECK([whether pthread_create exists as a global function],
+        [gl_cv_func_pthread_create],
+        [saved_LIBS="$LIBS"
+         LIBS="$LIBS $LIBPMULTITHREAD"
+         AC_LINK_IFELSE(
+           [AC_LANG_SOURCE(
+              [[extern
+                #ifdef __cplusplus
+                "C"
+                #endif
+                int pthread_create (void);
+                int main ()
+                {
+                  return pthread_create ();
+                }
+              ]])],
+           [gl_cv_func_pthread_create=yes],
+           [gl_cv_func_pthread_create=no])
+         LIBS="$saved_LIBS"
+        ])
+      if test $gl_cv_func_pthread_create = no; then
+        REPLACE_PTHREAD_CREATE=1
+        REPLACE_PTHREAD_ATTR_INIT=1
+        AC_DEFINE([PTHREAD_CREATE_IS_INLINE], [1],
+          [Define if pthread_create is an inline function.])
+      fi
+    fi
+  fi
+])
diff --git a/src/grep/m4/pthread_h.m4 b/src/grep/m4/pthread_h.m4
new file mode 100644
index 0000000..62a6ca8
--- /dev/null
+++ b/src/grep/m4/pthread_h.m4
@@ -0,0 +1,283 @@
+# pthread_h.m4 serial 8
+dnl Copyright (C) 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN_ONCE([gl_PTHREAD_H],
+[
+  dnl Ensure to expand the default settings once only, before all statements
+  dnl that occur in other macros.
+  AC_REQUIRE([gl_PTHREAD_H_DEFAULTS])
+
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([gl_PTHREADLIB])
+
+  gl_CHECK_NEXT_HEADERS([pthread.h])
+  if test $ac_cv_header_pthread_h = yes; then
+    HAVE_PTHREAD_H=1
+    dnl On mingw, if --enable-threads=windows or gl_AVOID_WINPTHREAD is used,
+    dnl ignore the <pthread.h> from the mingw-w64 winpthreads library.
+    m4_ifdef([gl_][THREADLIB], [
+      AC_REQUIRE([gl_][THREADLIB])
+      if { case "$host_os" in mingw*) true;; *) false;; esac; } \
+         && test $gl_threads_api = windows; then
+        HAVE_PTHREAD_H=0
+      fi
+    ])
+  else
+    HAVE_PTHREAD_H=0
+  fi
+  AC_SUBST([HAVE_PTHREAD_H])
+
+  AC_CHECK_TYPES([pthread_t, pthread_spinlock_t], [], [],
+    [AC_INCLUDES_DEFAULT[
+     #if HAVE_PTHREAD_H
+      #include <pthread.h>
+     #endif]])
+  if test $ac_cv_type_pthread_t != yes; then
+    HAVE_PTHREAD_T=0
+  fi
+  if test $ac_cv_type_pthread_spinlock_t != yes; then
+    HAVE_PTHREAD_SPINLOCK_T=0
+  fi
+
+  dnl Constants may be defined as C preprocessor macros or as enum items.
+
+  AC_CACHE_CHECK([for PTHREAD_CREATE_DETACHED],
+    [gl_cv_const_PTHREAD_CREATE_DETACHED],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <pthread.h>
+            int x = PTHREAD_CREATE_DETACHED;
+          ]],
+          [[]])],
+       [gl_cv_const_PTHREAD_CREATE_DETACHED=yes],
+       [gl_cv_const_PTHREAD_CREATE_DETACHED=no])
+    ])
+  if test $gl_cv_const_PTHREAD_CREATE_DETACHED != yes; then
+    HAVE_PTHREAD_CREATE_DETACHED=0
+  fi
+
+  AC_CACHE_CHECK([for PTHREAD_MUTEX_RECURSIVE],
+    [gl_cv_const_PTHREAD_MUTEX_RECURSIVE],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <pthread.h>
+            int x = PTHREAD_MUTEX_RECURSIVE;
+          ]],
+          [[]])],
+       [gl_cv_const_PTHREAD_MUTEX_RECURSIVE=yes],
+       [gl_cv_const_PTHREAD_MUTEX_RECURSIVE=no])
+    ])
+  if test $gl_cv_const_PTHREAD_MUTEX_RECURSIVE != yes; then
+    HAVE_PTHREAD_MUTEX_RECURSIVE=0
+  fi
+
+  AC_CACHE_CHECK([for PTHREAD_MUTEX_ROBUST],
+    [gl_cv_const_PTHREAD_MUTEX_ROBUST],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <pthread.h>
+            int x = PTHREAD_MUTEX_ROBUST;
+          ]],
+          [[]])],
+       [gl_cv_const_PTHREAD_MUTEX_ROBUST=yes],
+       [gl_cv_const_PTHREAD_MUTEX_ROBUST=no])
+    ])
+  if test $gl_cv_const_PTHREAD_MUTEX_ROBUST != yes; then
+    HAVE_PTHREAD_MUTEX_ROBUST=0
+  fi
+
+  AC_CACHE_CHECK([for PTHREAD_PROCESS_SHARED],
+    [gl_cv_const_PTHREAD_PROCESS_SHARED],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <pthread.h>
+            int x = PTHREAD_PROCESS_SHARED;
+          ]],
+          [[]])],
+       [gl_cv_const_PTHREAD_PROCESS_SHARED=yes],
+       [gl_cv_const_PTHREAD_PROCESS_SHARED=no])
+    ])
+  if test $gl_cv_const_PTHREAD_PROCESS_SHARED != yes; then
+    HAVE_PTHREAD_PROCESS_SHARED=0
+  fi
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use, if it is not common
+  dnl enough to be declared everywhere.
+  gl_WARN_ON_USE_PREPARE([[#include <pthread.h>
+    ]], [
+    pthread_create pthread_attr_init pthread_attr_getdetachstate
+    pthread_attr_setdetachstate pthread_attr_destroy pthread_self pthread_equal
+    pthread_detach pthread_join pthread_exit
+    pthread_once
+    pthread_mutex_init pthread_mutexattr_init pthread_mutexattr_gettype
+    pthread_mutexattr_settype pthread_mutexattr_getrobust
+    pthread_mutexattr_setrobust pthread_mutexattr_destroy pthread_mutex_lock
+    pthread_mutex_trylock pthread_mutex_timedlock pthread_mutex_unlock
+    pthread_mutex_destroy
+    pthread_rwlock_init pthread_rwlockattr_init pthread_rwlockattr_destroy
+    pthread_rwlock_rdlock pthread_rwlock_wrlock pthread_rwlock_tryrdlock
+    pthread_rwlock_trywrlock pthread_rwlock_timedrdlock
+    pthread_rwlock_timedwrlock pthread_rwlock_unlock pthread_rwlock_destroy
+    pthread_cond_init pthread_condattr_init pthread_condattr_destroy
+    pthread_cond_wait pthread_cond_timedwait pthread_cond_signal
+    pthread_cond_broadcast pthread_cond_destroy
+    pthread_key_create pthread_setspecific pthread_getspecific
+    pthread_key_delete
+    pthread_spin_init pthread_spin_lock pthread_spin_trylock pthread_spin_unlock
+    pthread_spin_destroy])
+
+  AC_REQUIRE([AC_C_RESTRICT])
+
+  dnl For backward compatibility with gnulib versions <= 2019-07.
+  LIB_PTHREAD="$LIBPMULTITHREAD"
+  AC_SUBST([LIB_PTHREAD])
+])
+
+# gl_PTHREAD_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_PTHREAD_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_PTHREAD_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_PTHREAD_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_PTHREAD_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PTHREAD_THREAD])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PTHREAD_ONCE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PTHREAD_MUTEX])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PTHREAD_RWLOCK])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PTHREAD_COND])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PTHREAD_TSS])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PTHREAD_SPIN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PTHREAD_MUTEX_TIMEDLOCK])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_PTHREAD_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_PTHREAD_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_PTHREAD_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_PTHREAD_T=1;                      AC_SUBST([HAVE_PTHREAD_T])
+  HAVE_PTHREAD_SPINLOCK_T=1;             AC_SUBST([HAVE_PTHREAD_SPINLOCK_T])
+  HAVE_PTHREAD_CREATE_DETACHED=1;        AC_SUBST([HAVE_PTHREAD_CREATE_DETACHED])
+  HAVE_PTHREAD_MUTEX_RECURSIVE=1;        AC_SUBST([HAVE_PTHREAD_MUTEX_RECURSIVE])
+  HAVE_PTHREAD_MUTEX_ROBUST=1;           AC_SUBST([HAVE_PTHREAD_MUTEX_ROBUST])
+  HAVE_PTHREAD_PROCESS_SHARED=1;         AC_SUBST([HAVE_PTHREAD_PROCESS_SHARED])
+  HAVE_PTHREAD_CREATE=1;                 AC_SUBST([HAVE_PTHREAD_CREATE])
+  HAVE_PTHREAD_ATTR_INIT=1;              AC_SUBST([HAVE_PTHREAD_ATTR_INIT])
+  HAVE_PTHREAD_ATTR_GETDETACHSTATE=1;    AC_SUBST([HAVE_PTHREAD_ATTR_GETDETACHSTATE])
+  HAVE_PTHREAD_ATTR_SETDETACHSTATE=1;    AC_SUBST([HAVE_PTHREAD_ATTR_SETDETACHSTATE])
+  HAVE_PTHREAD_ATTR_DESTROY=1;           AC_SUBST([HAVE_PTHREAD_ATTR_DESTROY])
+  HAVE_PTHREAD_SELF=1;                   AC_SUBST([HAVE_PTHREAD_SELF])
+  HAVE_PTHREAD_EQUAL=1;                  AC_SUBST([HAVE_PTHREAD_EQUAL])
+  HAVE_PTHREAD_DETACH=1;                 AC_SUBST([HAVE_PTHREAD_DETACH])
+  HAVE_PTHREAD_JOIN=1;                   AC_SUBST([HAVE_PTHREAD_JOIN])
+  HAVE_PTHREAD_EXIT=1;                   AC_SUBST([HAVE_PTHREAD_EXIT])
+  HAVE_PTHREAD_ONCE=1;                   AC_SUBST([HAVE_PTHREAD_ONCE])
+  HAVE_PTHREAD_MUTEX_INIT=1;             AC_SUBST([HAVE_PTHREAD_MUTEX_INIT])
+  HAVE_PTHREAD_MUTEXATTR_INIT=1;         AC_SUBST([HAVE_PTHREAD_MUTEXATTR_INIT])
+  HAVE_PTHREAD_MUTEXATTR_GETTYPE=1;      AC_SUBST([HAVE_PTHREAD_MUTEXATTR_GETTYPE])
+  HAVE_PTHREAD_MUTEXATTR_SETTYPE=1;      AC_SUBST([HAVE_PTHREAD_MUTEXATTR_SETTYPE])
+  HAVE_PTHREAD_MUTEXATTR_GETROBUST=1;    AC_SUBST([HAVE_PTHREAD_MUTEXATTR_GETROBUST])
+  HAVE_PTHREAD_MUTEXATTR_SETROBUST=1;    AC_SUBST([HAVE_PTHREAD_MUTEXATTR_SETROBUST])
+  HAVE_PTHREAD_MUTEXATTR_DESTROY=1;      AC_SUBST([HAVE_PTHREAD_MUTEXATTR_DESTROY])
+  HAVE_PTHREAD_MUTEX_LOCK=1;             AC_SUBST([HAVE_PTHREAD_MUTEX_LOCK])
+  HAVE_PTHREAD_MUTEX_TRYLOCK=1;          AC_SUBST([HAVE_PTHREAD_MUTEX_TRYLOCK])
+  HAVE_PTHREAD_MUTEX_TIMEDLOCK=1;        AC_SUBST([HAVE_PTHREAD_MUTEX_TIMEDLOCK])
+  HAVE_PTHREAD_MUTEX_UNLOCK=1;           AC_SUBST([HAVE_PTHREAD_MUTEX_UNLOCK])
+  HAVE_PTHREAD_MUTEX_DESTROY=1;          AC_SUBST([HAVE_PTHREAD_MUTEX_DESTROY])
+  HAVE_PTHREAD_RWLOCK_INIT=1;            AC_SUBST([HAVE_PTHREAD_RWLOCK_INIT])
+  HAVE_PTHREAD_RWLOCKATTR_INIT=1;        AC_SUBST([HAVE_PTHREAD_RWLOCKATTR_INIT])
+  HAVE_PTHREAD_RWLOCKATTR_DESTROY=1;     AC_SUBST([HAVE_PTHREAD_RWLOCKATTR_DESTROY])
+  HAVE_PTHREAD_RWLOCK_RDLOCK=1;          AC_SUBST([HAVE_PTHREAD_RWLOCK_RDLOCK])
+  HAVE_PTHREAD_RWLOCK_WRLOCK=1;          AC_SUBST([HAVE_PTHREAD_RWLOCK_WRLOCK])
+  HAVE_PTHREAD_RWLOCK_TRYRDLOCK=1;       AC_SUBST([HAVE_PTHREAD_RWLOCK_TRYRDLOCK])
+  HAVE_PTHREAD_RWLOCK_TRYWRLOCK=1;       AC_SUBST([HAVE_PTHREAD_RWLOCK_TRYWRLOCK])
+  HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK=1;     AC_SUBST([HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK])
+  HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK=1;     AC_SUBST([HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK])
+  HAVE_PTHREAD_RWLOCK_UNLOCK=1;          AC_SUBST([HAVE_PTHREAD_RWLOCK_UNLOCK])
+  HAVE_PTHREAD_RWLOCK_DESTROY=1;         AC_SUBST([HAVE_PTHREAD_RWLOCK_DESTROY])
+  HAVE_PTHREAD_COND_INIT=1;              AC_SUBST([HAVE_PTHREAD_COND_INIT])
+  HAVE_PTHREAD_CONDATTR_INIT=1;          AC_SUBST([HAVE_PTHREAD_CONDATTR_INIT])
+  HAVE_PTHREAD_CONDATTR_DESTROY=1;       AC_SUBST([HAVE_PTHREAD_CONDATTR_DESTROY])
+  HAVE_PTHREAD_COND_WAIT=1;              AC_SUBST([HAVE_PTHREAD_COND_WAIT])
+  HAVE_PTHREAD_COND_TIMEDWAIT=1;         AC_SUBST([HAVE_PTHREAD_COND_TIMEDWAIT])
+  HAVE_PTHREAD_COND_SIGNAL=1;            AC_SUBST([HAVE_PTHREAD_COND_SIGNAL])
+  HAVE_PTHREAD_COND_BROADCAST=1;         AC_SUBST([HAVE_PTHREAD_COND_BROADCAST])
+  HAVE_PTHREAD_COND_DESTROY=1;           AC_SUBST([HAVE_PTHREAD_COND_DESTROY])
+  HAVE_PTHREAD_KEY_CREATE=1;             AC_SUBST([HAVE_PTHREAD_KEY_CREATE])
+  HAVE_PTHREAD_SETSPECIFIC=1;            AC_SUBST([HAVE_PTHREAD_SETSPECIFIC])
+  HAVE_PTHREAD_GETSPECIFIC=1;            AC_SUBST([HAVE_PTHREAD_GETSPECIFIC])
+  HAVE_PTHREAD_KEY_DELETE=1;             AC_SUBST([HAVE_PTHREAD_KEY_DELETE])
+  HAVE_PTHREAD_SPIN_INIT=1;              AC_SUBST([HAVE_PTHREAD_SPIN_INIT])
+  HAVE_PTHREAD_SPIN_LOCK=1;              AC_SUBST([HAVE_PTHREAD_SPIN_LOCK])
+  HAVE_PTHREAD_SPIN_TRYLOCK=1;           AC_SUBST([HAVE_PTHREAD_SPIN_TRYLOCK])
+  HAVE_PTHREAD_SPIN_UNLOCK=1;            AC_SUBST([HAVE_PTHREAD_SPIN_UNLOCK])
+  HAVE_PTHREAD_SPIN_DESTROY=1;           AC_SUBST([HAVE_PTHREAD_SPIN_DESTROY])
+  REPLACE_PTHREAD_CREATE=0;              AC_SUBST([REPLACE_PTHREAD_CREATE])
+  REPLACE_PTHREAD_ATTR_INIT=0;           AC_SUBST([REPLACE_PTHREAD_ATTR_INIT])
+  REPLACE_PTHREAD_ATTR_GETDETACHSTATE=0; AC_SUBST([REPLACE_PTHREAD_ATTR_GETDETACHSTATE])
+  REPLACE_PTHREAD_ATTR_SETDETACHSTATE=0; AC_SUBST([REPLACE_PTHREAD_ATTR_SETDETACHSTATE])
+  REPLACE_PTHREAD_ATTR_DESTROY=0;        AC_SUBST([REPLACE_PTHREAD_ATTR_DESTROY])
+  REPLACE_PTHREAD_SELF=0;                AC_SUBST([REPLACE_PTHREAD_SELF])
+  REPLACE_PTHREAD_EQUAL=0;               AC_SUBST([REPLACE_PTHREAD_EQUAL])
+  REPLACE_PTHREAD_DETACH=0;              AC_SUBST([REPLACE_PTHREAD_DETACH])
+  REPLACE_PTHREAD_JOIN=0;                AC_SUBST([REPLACE_PTHREAD_JOIN])
+  REPLACE_PTHREAD_EXIT=0;                AC_SUBST([REPLACE_PTHREAD_EXIT])
+  REPLACE_PTHREAD_ONCE=0;                AC_SUBST([REPLACE_PTHREAD_ONCE])
+  REPLACE_PTHREAD_MUTEX_INIT=0;          AC_SUBST([REPLACE_PTHREAD_MUTEX_INIT])
+  REPLACE_PTHREAD_MUTEXATTR_INIT=0;      AC_SUBST([REPLACE_PTHREAD_MUTEXATTR_INIT])
+  REPLACE_PTHREAD_MUTEXATTR_GETTYPE=0;   AC_SUBST([REPLACE_PTHREAD_MUTEXATTR_GETTYPE])
+  REPLACE_PTHREAD_MUTEXATTR_SETTYPE=0;   AC_SUBST([REPLACE_PTHREAD_MUTEXATTR_SETTYPE])
+  REPLACE_PTHREAD_MUTEXATTR_GETROBUST=0; AC_SUBST([REPLACE_PTHREAD_MUTEXATTR_GETROBUST])
+  REPLACE_PTHREAD_MUTEXATTR_SETROBUST=0; AC_SUBST([REPLACE_PTHREAD_MUTEXATTR_SETROBUST])
+  REPLACE_PTHREAD_MUTEXATTR_DESTROY=0;   AC_SUBST([REPLACE_PTHREAD_MUTEXATTR_DESTROY])
+  REPLACE_PTHREAD_MUTEX_LOCK=0;          AC_SUBST([REPLACE_PTHREAD_MUTEX_LOCK])
+  REPLACE_PTHREAD_MUTEX_TRYLOCK=0;       AC_SUBST([REPLACE_PTHREAD_MUTEX_TRYLOCK])
+  REPLACE_PTHREAD_MUTEX_TIMEDLOCK=0;     AC_SUBST([REPLACE_PTHREAD_MUTEX_TIMEDLOCK])
+  REPLACE_PTHREAD_MUTEX_UNLOCK=0;        AC_SUBST([REPLACE_PTHREAD_MUTEX_UNLOCK])
+  REPLACE_PTHREAD_MUTEX_DESTROY=0;       AC_SUBST([REPLACE_PTHREAD_MUTEX_DESTROY])
+  REPLACE_PTHREAD_RWLOCK_INIT=0;         AC_SUBST([REPLACE_PTHREAD_RWLOCK_INIT])
+  REPLACE_PTHREAD_RWLOCKATTR_INIT=0;     AC_SUBST([REPLACE_PTHREAD_RWLOCKATTR_INIT])
+  REPLACE_PTHREAD_RWLOCKATTR_DESTROY=0;  AC_SUBST([REPLACE_PTHREAD_RWLOCKATTR_DESTROY])
+  REPLACE_PTHREAD_RWLOCK_RDLOCK=0;       AC_SUBST([REPLACE_PTHREAD_RWLOCK_RDLOCK])
+  REPLACE_PTHREAD_RWLOCK_WRLOCK=0;       AC_SUBST([REPLACE_PTHREAD_RWLOCK_WRLOCK])
+  REPLACE_PTHREAD_RWLOCK_TRYRDLOCK=0;    AC_SUBST([REPLACE_PTHREAD_RWLOCK_TRYRDLOCK])
+  REPLACE_PTHREAD_RWLOCK_TRYWRLOCK=0;    AC_SUBST([REPLACE_PTHREAD_RWLOCK_TRYWRLOCK])
+  REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK=0;  AC_SUBST([REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK])
+  REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK=0;  AC_SUBST([REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK])
+  REPLACE_PTHREAD_RWLOCK_UNLOCK=0;       AC_SUBST([REPLACE_PTHREAD_RWLOCK_UNLOCK])
+  REPLACE_PTHREAD_RWLOCK_DESTROY=0;      AC_SUBST([REPLACE_PTHREAD_RWLOCK_DESTROY])
+  REPLACE_PTHREAD_COND_INIT=0;           AC_SUBST([REPLACE_PTHREAD_COND_INIT])
+  REPLACE_PTHREAD_CONDATTR_INIT=0;       AC_SUBST([REPLACE_PTHREAD_CONDATTR_INIT])
+  REPLACE_PTHREAD_CONDATTR_DESTROY=0;    AC_SUBST([REPLACE_PTHREAD_CONDATTR_DESTROY])
+  REPLACE_PTHREAD_COND_WAIT=0;           AC_SUBST([REPLACE_PTHREAD_COND_WAIT])
+  REPLACE_PTHREAD_COND_TIMEDWAIT=0;      AC_SUBST([REPLACE_PTHREAD_COND_TIMEDWAIT])
+  REPLACE_PTHREAD_COND_SIGNAL=0;         AC_SUBST([REPLACE_PTHREAD_COND_SIGNAL])
+  REPLACE_PTHREAD_COND_BROADCAST=0;      AC_SUBST([REPLACE_PTHREAD_COND_BROADCAST])
+  REPLACE_PTHREAD_COND_DESTROY=0;        AC_SUBST([REPLACE_PTHREAD_COND_DESTROY])
+  REPLACE_PTHREAD_KEY_CREATE=0;          AC_SUBST([REPLACE_PTHREAD_KEY_CREATE])
+  REPLACE_PTHREAD_SETSPECIFIC=0;         AC_SUBST([REPLACE_PTHREAD_SETSPECIFIC])
+  REPLACE_PTHREAD_GETSPECIFIC=0;         AC_SUBST([REPLACE_PTHREAD_GETSPECIFIC])
+  REPLACE_PTHREAD_KEY_DELETE=0;          AC_SUBST([REPLACE_PTHREAD_KEY_DELETE])
+  REPLACE_PTHREAD_SPIN_INIT=0;           AC_SUBST([REPLACE_PTHREAD_SPIN_INIT])
+  REPLACE_PTHREAD_SPIN_LOCK=0;           AC_SUBST([REPLACE_PTHREAD_SPIN_LOCK])
+  REPLACE_PTHREAD_SPIN_TRYLOCK=0;        AC_SUBST([REPLACE_PTHREAD_SPIN_TRYLOCK])
+  REPLACE_PTHREAD_SPIN_UNLOCK=0;         AC_SUBST([REPLACE_PTHREAD_SPIN_UNLOCK])
+  REPLACE_PTHREAD_SPIN_DESTROY=0;        AC_SUBST([REPLACE_PTHREAD_SPIN_DESTROY])
+])
diff --git a/src/grep/m4/pthread_rwlock_rdlock.m4 b/src/grep/m4/pthread_rwlock_rdlock.m4
new file mode 100644
index 0000000..a5fbead
--- /dev/null
+++ b/src/grep/m4/pthread_rwlock_rdlock.m4
@@ -0,0 +1,185 @@
+# pthread_rwlock_rdlock.m4 serial 4
+dnl Copyright (C) 2017-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+dnl Inspired by
+dnl https://github.com/linux-test-project/ltp/blob/master/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/2-2.c
+dnl by Intel Corporation.
+
+dnl Test whether in a situation where
+dnl   - an rwlock is taken by a reader and has a writer waiting,
+dnl   - an additional reader requests the lock,
+dnl   - the waiting writer and the requesting reader threads have the same
+dnl     priority,
+dnl the requesting reader thread gets blocked, so that at some point the
+dnl waiting writer can acquire the lock.
+dnl Without such a guarantee, when there a N readers and each of the readers
+dnl spends more than 1/Nth of the time with the lock held, there is a high
+dnl probability that the waiting writer will not get the lock in a given finite
+dnl time, a phenomenon called "writer starvation".
+dnl Without such a guarantee, applications have a hard time avoiding writer
+dnl starvation.
+dnl
+dnl POSIX:2017 makes this requirement only for implementations that support TPS
+dnl (Thread Priority Scheduling) and only for the scheduling policies SCHED_FIFO
+dnl and SCHED_RR, see
+dnl https://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_rwlock_rdlock.html
+dnl but this test verifies the guarantee regardless of TPS and regardless of
+dnl scheduling policy.
+dnl Glibc does not provide this guarantee (and never will on Linux), see
+dnl https://sourceware.org/bugzilla/show_bug.cgi?id=13701
+dnl https://bugzilla.redhat.com/show_bug.cgi?id=1410052
+AC_DEFUN([gl_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER],
+[
+  AC_REQUIRE([gl_THREADLIB_EARLY])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([whether pthread_rwlock_rdlock prefers a writer to a reader],
+    [gl_cv_pthread_rwlock_rdlock_prefer_writer],
+    [save_LIBS="$LIBS"
+     LIBS="$LIBS $LIBMULTITHREAD"
+     AC_RUN_IFELSE(
+       [AC_LANG_SOURCE([[
+#include <errno.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#define SUCCEED() exit (0)
+#define FAILURE() exit (1)
+#define UNEXPECTED(n) (exit (10 + (n)))
+
+/* The main thread creates the waiting writer and the requesting reader threads
+   in the default way; this guarantees that they have the same priority.
+   We can reuse the main thread as first reader thread.  */
+
+static pthread_rwlock_t lock;
+static pthread_t reader1;
+static pthread_t writer;
+static pthread_t reader2;
+static pthread_t timer;
+/* Used to pass control from writer to reader2 and from reader2 to timer,
+   as in a relay race.
+   Passing control from one running thread to another running thread
+   is most likely faster than to create the second thread.  */
+static pthread_mutex_t baton;
+
+static void *
+timer_func (void *ignored)
+{
+  /* Step 13 (can be before or after step 12):
+     The timer thread takes the baton, then waits a moment to make sure
+     it can tell whether the second reader thread is blocked at step 12.  */
+  if (pthread_mutex_lock (&baton))
+    UNEXPECTED (13);
+  usleep (100000);
+  /* By the time we get here, it's clear that the second reader thread is
+     blocked at step 12.  This is the desired behaviour.  */
+  SUCCEED ();
+}
+
+static void *
+reader2_func (void *ignored)
+{
+  int err;
+
+  /* Step 8 (can be before or after step 7):
+     The second reader thread takes the baton, then waits a moment to make sure
+     the writer thread has reached step 7.  */
+  if (pthread_mutex_lock (&baton))
+    UNEXPECTED (8);
+  usleep (100000);
+  /* Step 9: The second reader thread requests the lock.  */
+  err = pthread_rwlock_tryrdlock (&lock);
+  if (err == 0)
+    FAILURE ();
+  else if (err != EBUSY)
+    UNEXPECTED (9);
+  /* Step 10: Launch a timer, to test whether the next call blocks.  */
+  if (pthread_create (&timer, NULL, timer_func, NULL))
+    UNEXPECTED (10);
+  /* Step 11: Release the baton.  */
+  if (pthread_mutex_unlock (&baton))
+    UNEXPECTED (11);
+  /* Step 12: The second reader thread requests the lock.  */
+  err = pthread_rwlock_rdlock (&lock);
+  if (err == 0)
+    FAILURE ();
+  else
+    UNEXPECTED (12);
+}
+
+static void *
+writer_func (void *ignored)
+{
+  /* Step 4: Take the baton, so that the second reader thread does not go ahead
+     too early.  */
+  if (pthread_mutex_lock (&baton))
+    UNEXPECTED (4);
+  /* Step 5: Create the second reader thread.  */
+  if (pthread_create (&reader2, NULL, reader2_func, NULL))
+    UNEXPECTED (5);
+  /* Step 6: Release the baton.  */
+  if (pthread_mutex_unlock (&baton))
+    UNEXPECTED (6);
+  /* Step 7: The writer thread requests the lock.  */
+  if (pthread_rwlock_wrlock (&lock))
+    UNEXPECTED (7);
+  return NULL;
+}
+
+int
+main ()
+{
+  reader1 = pthread_self ();
+
+  /* Step 1: The main thread initializes the lock and the baton.  */
+  if (pthread_rwlock_init (&lock, NULL))
+    UNEXPECTED (1);
+  if (pthread_mutex_init (&baton, NULL))
+    UNEXPECTED (1);
+  /* Step 2: The main thread acquires the lock as a reader.  */
+  if (pthread_rwlock_rdlock (&lock))
+    UNEXPECTED (2);
+  /* Step 3: Create the writer thread.  */
+  if (pthread_create (&writer, NULL, writer_func, NULL))
+    UNEXPECTED (3);
+  /* Job done.  Go to sleep.  */
+  for (;;)
+    {
+      sleep (1);
+    }
+}
+]])],
+       [gl_cv_pthread_rwlock_rdlock_prefer_writer=yes],
+       [gl_cv_pthread_rwlock_rdlock_prefer_writer=no],
+       [case "$host_os" in
+                         # Guess no on glibc systems.
+          *-gnu* | gnu*) gl_cv_pthread_rwlock_rdlock_prefer_writer="guessing no" ;;
+                         # Guess no on musl systems.
+          *-musl*)       gl_cv_pthread_rwlock_rdlock_prefer_writer="guessing no" ;;
+                         # Guess no on bionic systems.
+          *-android*)    gl_cv_pthread_rwlock_rdlock_prefer_writer="guessing no" ;;
+                         # Guess yes on native Windows with the mingw-w64 winpthreads library.
+                         # Guess no on native Windows with the gnulib windows-rwlock module.
+          mingw*)        if test "$gl_use_threads" = yes || test "$gl_use_threads" = posix; then
+                           gl_cv_pthread_rwlock_rdlock_prefer_writer="guessing yes"
+                         else
+                           gl_cv_pthread_rwlock_rdlock_prefer_writer="guessing no"
+                         fi
+                         ;;
+                         # If we don't know, obey --enable-cross-guesses.
+          *)             gl_cv_pthread_rwlock_rdlock_prefer_writer="$gl_cross_guess_normal" ;;
+         esac
+       ])
+     LIBS="$save_LIBS"
+    ])
+  case "$gl_cv_pthread_rwlock_rdlock_prefer_writer" in
+    *yes)
+      AC_DEFINE([HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER], [1],
+        [Define if the 'pthread_rwlock_rdlock' function prefers a writer to a reader.])
+      ;;
+  esac
+])
diff --git a/src/grep/m4/pthread_sigmask.m4 b/src/grep/m4/pthread_sigmask.m4
new file mode 100644
index 0000000..ff7fa96
--- /dev/null
+++ b/src/grep/m4/pthread_sigmask.m4
@@ -0,0 +1,274 @@
+# pthread_sigmask.m4 serial 21
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_PTHREAD_SIGMASK],
+[
+  AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
+
+  AC_CHECK_FUNCS_ONCE([pthread_sigmask])
+
+  dnl On MinGW pthread_sigmask is just a macro which always returns 0.
+  dnl It does not exist as a real function, which is required by POSIX.
+  AC_CACHE_CHECK([whether pthread_sigmask is a macro],
+    [gl_cv_func_pthread_sigmask_macro],
+    [AC_EGREP_CPP([headers_define_pthread_sigmask], [
+#include <pthread.h>
+#include <signal.h>
+#ifdef pthread_sigmask
+ headers_define_pthread_sigmask
+#endif],
+       [gl_cv_func_pthread_sigmask_macro=yes],
+       [gl_cv_func_pthread_sigmask_macro=no])
+    ])
+
+  LIB_PTHREAD_SIGMASK=
+
+  if test $gl_cv_func_pthread_sigmask_macro = yes; then
+    dnl pthread_sigmask is a dummy macro.
+    HAVE_PTHREAD_SIGMASK=0
+    dnl Make sure to '#undef pthread_sigmask' before defining it.
+    REPLACE_PTHREAD_SIGMASK=1
+  else
+    dnl Test whether the gnulib module 'threadlib' is in use.
+    dnl Some packages like Emacs use --avoid=threadlib.
+    dnl Write the symbol in such a way that it does not cause 'aclocal' to pick
+    dnl the threadlib.m4 file that is installed in $PREFIX/share/aclocal/.
+    m4_ifdef([gl_][THREADLIB], [
+      AC_REQUIRE([gl_][THREADLIB])
+
+      if test "$gl_threads_api" = posix; then
+        if test $ac_cv_func_pthread_sigmask = yes; then
+          dnl pthread_sigmask is available without -lpthread.
+          :
+        else
+          if test -n "$LIBMULTITHREAD"; then
+            AC_CACHE_CHECK([for pthread_sigmask in $LIBMULTITHREAD],
+              [gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD],
+              [gl_save_LIBS="$LIBS"
+               LIBS="$LIBS $LIBMULTITHREAD"
+               AC_LINK_IFELSE(
+                 [AC_LANG_PROGRAM(
+                    [[#include <pthread.h>
+                      #include <signal.h>
+                    ]],
+                    [[return pthread_sigmask (0, (sigset_t *) 0, (sigset_t *) 0);]])
+                 ],
+                 [gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD=yes],
+                 [gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD=no])
+               LIBS="$gl_save_LIBS"
+              ])
+            if test $gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD = yes; then
+              dnl pthread_sigmask is available with -pthread or -lpthread.
+              LIB_PTHREAD_SIGMASK="$LIBMULTITHREAD"
+            else
+              dnl pthread_sigmask is not available at all.
+              HAVE_PTHREAD_SIGMASK=0
+            fi
+          else
+            dnl pthread_sigmask is not available at all.
+            HAVE_PTHREAD_SIGMASK=0
+          fi
+        fi
+      else
+        dnl pthread_sigmask may exist but does not interoperate with the chosen
+        dnl multithreading facility.
+        if test $ac_cv_func_pthread_sigmask = yes; then
+          REPLACE_PTHREAD_SIGMASK=1
+        else
+          HAVE_PTHREAD_SIGMASK=0
+        fi
+      fi
+    ], [
+      dnl The module 'threadlib' is not in use, due to --avoid=threadlib being
+      dnl specified.
+      dnl The package either has prepared CPPFLAGS and LIBS for use of
+      dnl POSIX:2008 threads, or wants to build single-threaded programs.
+      if test $ac_cv_func_pthread_sigmask = yes; then
+        dnl pthread_sigmask exists and does not require extra libraries.
+        dnl Assume that it is declared.
+        :
+      else
+        dnl pthread_sigmask either does not exist or needs extra libraries.
+        HAVE_PTHREAD_SIGMASK=0
+        dnl Define the symbol rpl_pthread_sigmask, not pthread_sigmask,
+        dnl so as to not accidentally override the system's pthread_sigmask
+        dnl symbol from libpthread. This is necessary on IRIX 6.5.
+        REPLACE_PTHREAD_SIGMASK=1
+      fi
+    ])
+  fi
+
+  AC_SUBST([LIB_PTHREAD_SIGMASK])
+  dnl We don't need a variable LTLIB_PTHREAD_SIGMASK, because when
+  dnl "$gl_threads_api" = posix, $LTLIBMULTITHREAD and $LIBMULTITHREAD are the
+  dnl same.
+
+  dnl Now test for some bugs in the system function.
+  if test $HAVE_PTHREAD_SIGMASK = 1; then
+    AC_REQUIRE([AC_PROG_CC])
+    AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+    dnl On FreeBSD 13.0, MidnightBSD 1.1, HP-UX 11.31, Solaris 9, in programs
+    dnl that are not linked with -lpthread, the pthread_sigmask() function
+    dnl always returns 0 and has no effect.
+    if test -z "$LIB_PTHREAD_SIGMASK"; then
+      case " $LIBS " in
+        *' -pthread '*) ;;
+        *' -lpthread '*) ;;
+        *)
+          AC_CACHE_CHECK([whether pthread_sigmask works without -lpthread],
+            [gl_cv_func_pthread_sigmask_in_libc_works],
+            [
+              AC_RUN_IFELSE(
+                [AC_LANG_SOURCE([[
+                   #include <pthread.h>
+                   #include <signal.h>
+                   #include <stddef.h>
+                   int main ()
+                   {
+                     sigset_t set;
+                     sigemptyset (&set);
+                     return pthread_sigmask (1729, &set, NULL) != 0;
+                   }]])],
+                [gl_cv_func_pthread_sigmask_in_libc_works=no],
+                [gl_cv_func_pthread_sigmask_in_libc_works=yes],
+                [
+                 changequote(,)dnl
+                 case "$host_os" in
+                   freebsd* | midnightbsd* | hpux* | solaris | solaris2.[2-9]*)
+                     gl_cv_func_pthread_sigmask_in_libc_works="guessing no";;
+                   *)
+                     gl_cv_func_pthread_sigmask_in_libc_works="guessing yes";;
+                 esac
+                 changequote([,])dnl
+                ])
+            ])
+          case "$gl_cv_func_pthread_sigmask_in_libc_works" in
+            *no)
+              REPLACE_PTHREAD_SIGMASK=1
+              AC_DEFINE([PTHREAD_SIGMASK_INEFFECTIVE], [1],
+                [Define to 1 if pthread_sigmask may return 0 and have no effect.])
+              ;;
+          esac;;
+      esac
+    fi
+
+    dnl On Cygwin 1.7.5, the pthread_sigmask() has a wrong return value
+    dnl convention: Upon failure, it returns -1 and sets errno.
+    AC_CACHE_CHECK([whether pthread_sigmask returns error numbers],
+      [gl_cv_func_pthread_sigmask_return_works],
+      [
+        gl_save_LIBS="$LIBS"
+        LIBS="$LIBS $LIB_PTHREAD_SIGMASK"
+        AC_RUN_IFELSE(
+          [AC_LANG_SOURCE([[
+#include <pthread.h>
+#include <signal.h>
+#include <stddef.h>
+int main ()
+{
+  sigset_t set;
+  sigemptyset (&set);
+  if (pthread_sigmask (1729, &set, NULL) == -1)
+    return 1;
+  return 0;
+}]])],
+          [gl_cv_func_pthread_sigmask_return_works=yes],
+          [gl_cv_func_pthread_sigmask_return_works=no],
+          [case "$host_os" in
+             cygwin*)
+               gl_cv_func_pthread_sigmask_return_works="guessing no";;
+             *)
+               gl_cv_func_pthread_sigmask_return_works="guessing yes";;
+           esac
+          ])
+        LIBS="$gl_save_LIBS"
+      ])
+    case "$gl_cv_func_pthread_sigmask_return_works" in
+      *no)
+        REPLACE_PTHREAD_SIGMASK=1
+        AC_DEFINE([PTHREAD_SIGMASK_FAILS_WITH_ERRNO], [1],
+          [Define to 1 if pthread_sigmask(), when it fails, returns -1 and sets errno.])
+        ;;
+    esac
+
+    dnl On IRIX 6.5, in a single-threaded program, pending signals are not
+    dnl immediately delivered when they are unblocked through pthread_sigmask,
+    dnl only a little while later.
+    AC_CACHE_CHECK([whether pthread_sigmask unblocks signals correctly],
+      [gl_cv_func_pthread_sigmask_unblock_works],
+      [
+        case "$host_os" in
+          irix*)
+            gl_cv_func_pthread_sigmask_unblock_works="guessing no";;
+          *)
+            gl_cv_func_pthread_sigmask_unblock_works="guessing yes";;
+        esac
+        m4_ifdef([gl_][THREADLIB],
+          [dnl Link against $LIBMULTITHREAD, not only $LIB_PTHREAD_SIGMASK.
+           dnl Otherwise we get a false positive on those platforms where
+           dnl $gl_cv_func_pthread_sigmask_in_libc_works is "no".
+           gl_save_LIBS=$LIBS
+           LIBS="$LIBS $LIBMULTITHREAD"])
+        AC_RUN_IFELSE(
+          [AC_LANG_SOURCE([[
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+]GL_MDA_DEFINES[
+static volatile int sigint_occurred;
+static void
+sigint_handler (int sig)
+{
+  sigint_occurred++;
+}
+int main ()
+{
+  sigset_t set;
+  int pid = getpid ();
+  char command[80];
+  signal (SIGINT, sigint_handler);
+  sigemptyset (&set);
+  sigaddset (&set, SIGINT);
+  if (!(pthread_sigmask (SIG_BLOCK, &set, NULL) == 0))
+    return 1;
+  sprintf (command, "sh -c 'sleep 1; kill -%d %d' &", SIGINT, pid);
+  if (!(system (command) == 0))
+    return 2;
+  sleep (2);
+  if (!(sigint_occurred == 0))
+    return 3;
+  if (!(pthread_sigmask (SIG_UNBLOCK, &set, NULL) == 0))
+    return 4;
+  if (!(sigint_occurred == 1)) /* This fails on IRIX.  */
+    return 5;
+  return 0;
+}]])],
+          [:],
+          [gl_cv_func_pthread_sigmask_unblock_works=no],
+          [:])
+        m4_ifdef([gl_][THREADLIB], [LIBS=$gl_save_LIBS])
+      ])
+    case "$gl_cv_func_pthread_sigmask_unblock_works" in
+      *no)
+        REPLACE_PTHREAD_SIGMASK=1
+        AC_DEFINE([PTHREAD_SIGMASK_UNBLOCK_BUG], [1],
+          [Define to 1 if pthread_sigmask() unblocks signals incorrectly.])
+        ;;
+    esac
+  fi
+])
+
+# Prerequisite of lib/pthread_sigmask.c.
+AC_DEFUN([gl_PREREQ_PTHREAD_SIGMASK],
+[
+  if test $HAVE_PTHREAD_SIGMASK = 1; then
+    AC_DEFINE([HAVE_PTHREAD_SIGMASK], [1],
+      [Define to 1 if the pthread_sigmask function can be used (despite bugs).])
+  fi
+])
diff --git a/src/grep/m4/putenv.m4 b/src/grep/m4/putenv.m4
new file mode 100644
index 0000000..919984d
--- /dev/null
+++ b/src/grep/m4/putenv.m4
@@ -0,0 +1,64 @@
+# putenv.m4 serial 25
+dnl Copyright (C) 2002-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Jim Meyering.
+dnl
+dnl Check whether putenv ("FOO") removes FOO from the environment.
+dnl The putenv in libc on at least SunOS 4.1.4 does *not* do that.
+
+AC_DEFUN([gl_FUNC_PUTENV],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CACHE_CHECK([for putenv compatible with GNU and SVID],
+    [gl_cv_func_svid_putenv],
+    [AC_RUN_IFELSE(
+       [AC_LANG_PROGRAM(
+          [AC_INCLUDES_DEFAULT
+           GL_MDA_DEFINES],
+          [[
+            /* Put it in env.  */
+            if (putenv ("CONFTEST_putenv=val"))
+              return 1;
+
+            /* Try to remove it.  */
+            if (putenv ("CONFTEST_putenv"))
+              return 2;
+
+            /* Make sure it was deleted.  */
+            if (getenv ("CONFTEST_putenv") != 0)
+              return 3;
+
+            return 0;
+          ]])],
+       [gl_cv_func_svid_putenv=yes],
+       [gl_cv_func_svid_putenv=no],
+       [dnl When crosscompiling, assume putenv is broken.
+        case "$host_os" in
+                         # Guess yes on glibc systems.
+          *-gnu* | gnu*) gl_cv_func_svid_putenv="guessing yes" ;;
+                         # Guess yes on musl systems.
+          *-musl*)       gl_cv_func_svid_putenv="guessing yes" ;;
+                         # Guess no on native Windows.
+          mingw*)        gl_cv_func_svid_putenv="guessing no" ;;
+                         # If we don't know, obey --enable-cross-guesses.
+          *)             gl_cv_func_svid_putenv="$gl_cross_guess_normal" ;;
+        esac
+       ])
+    ])
+  case "$gl_cv_func_svid_putenv" in
+    *yes) ;;
+    *)
+      REPLACE_PUTENV=1
+      ;;
+  esac
+])
+
+# Prerequisites of lib/putenv.c.
+AC_DEFUN([gl_PREREQ_PUTENV],
+[
+  AC_CHECK_DECLS([_putenv])
+])
diff --git a/src/grep/m4/quote.m4 b/src/grep/m4/quote.m4
new file mode 100644
index 0000000..be205c0
--- /dev/null
+++ b/src/grep/m4/quote.m4
@@ -0,0 +1,13 @@
+# quote.m4 serial 6
+dnl Copyright (C) 2002-2003, 2005-2006, 2009-2021 Free Software Foundation,
+dnl Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_QUOTE],
+[
+  dnl Prerequisites of lib/quote.c.
+  dnl (none)
+  :
+])
diff --git a/src/grep/m4/quotearg.m4 b/src/grep/m4/quotearg.m4
new file mode 100644
index 0000000..19067f5
--- /dev/null
+++ b/src/grep/m4/quotearg.m4
@@ -0,0 +1,11 @@
+# quotearg.m4 serial 10
+dnl Copyright (C) 2002, 2004-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_QUOTEARG],
+[
+  AC_REQUIRE([AC_C_RESTRICT])
+  :
+])
diff --git a/src/grep/m4/raise.m4 b/src/grep/m4/raise.m4
new file mode 100644
index 0000000..4bf0ca9
--- /dev/null
+++ b/src/grep/m4/raise.m4
@@ -0,0 +1,36 @@
+# raise.m4 serial 4
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_RAISE],
+[
+  AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CHECK_FUNCS([raise])
+  if test $ac_cv_func_raise = no; then
+    HAVE_RAISE=0
+  else
+    m4_ifdef([gl_MSVC_INVAL], [
+      AC_REQUIRE([gl_MSVC_INVAL])
+      if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+        REPLACE_RAISE=1
+      fi
+    ])
+    m4_ifdef([gl_SIGNALBLOCKING], [
+      gl_SIGNALBLOCKING
+      if test $HAVE_POSIX_SIGNALBLOCKING = 0; then
+        m4_ifdef([gl_SIGNAL_SIGPIPE], [
+          gl_SIGNAL_SIGPIPE
+          if test $gl_cv_header_signal_h_SIGPIPE != yes; then
+            REPLACE_RAISE=1
+          fi
+        ], [:])
+      fi
+    ])
+  fi
+])
+
+# Prerequisites of lib/raise.c.
+AC_DEFUN([gl_PREREQ_RAISE], [:])
diff --git a/src/grep/m4/rawmemchr.m4 b/src/grep/m4/rawmemchr.m4
new file mode 100644
index 0000000..452fab1
--- /dev/null
+++ b/src/grep/m4/rawmemchr.m4
@@ -0,0 +1,20 @@
+# rawmemchr.m4 serial 3
+dnl Copyright (C) 2003, 2007-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_RAWMEMCHR],
+[
+  dnl Persuade glibc <string.h> to declare rawmemchr().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_REQUIRE([gl_STRING_H_DEFAULTS])
+  AC_CHECK_FUNCS([rawmemchr])
+  if test $ac_cv_func_rawmemchr = no; then
+    HAVE_RAWMEMCHR=0
+  fi
+])
+
+# Prerequisites of lib/strchrnul.c.
+AC_DEFUN([gl_PREREQ_RAWMEMCHR], [:])
diff --git a/src/grep/m4/read.m4 b/src/grep/m4/read.m4
new file mode 100644
index 0000000..c162b7c
--- /dev/null
+++ b/src/grep/m4/read.m4
@@ -0,0 +1,28 @@
+# read.m4 serial 5
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_READ],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  m4_ifdef([gl_MSVC_INVAL], [
+    AC_REQUIRE([gl_MSVC_INVAL])
+    if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+      REPLACE_READ=1
+    fi
+  ])
+  dnl This ifdef is just an optimization, to avoid performing a configure
+  dnl check whose result is not used. It does not make the test of
+  dnl GNULIB_UNISTD_H_NONBLOCKING or GNULIB_NONBLOCKING redundant.
+  m4_ifdef([gl_NONBLOCKING_IO], [
+    gl_NONBLOCKING_IO
+    if test $gl_cv_have_nonblocking != yes; then
+      REPLACE_READ=1
+    fi
+  ])
+])
+
+# Prerequisites of lib/read.c.
+AC_DEFUN([gl_PREREQ_READ], [:])
diff --git a/src/grep/m4/readdir.m4 b/src/grep/m4/readdir.m4
new file mode 100644
index 0000000..94dc99c
--- /dev/null
+++ b/src/grep/m4/readdir.m4
@@ -0,0 +1,15 @@
+# readdir.m4 serial 1
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_READDIR],
+[
+  AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
+
+  AC_CHECK_FUNCS([readdir])
+  if test $ac_cv_func_readdir = no; then
+    HAVE_READDIR=0
+  fi
+])
diff --git a/src/grep/m4/realloc.m4 b/src/grep/m4/realloc.m4
new file mode 100644
index 0000000..0abc418
--- /dev/null
+++ b/src/grep/m4/realloc.m4
@@ -0,0 +1,63 @@
+# realloc.m4 serial 24
+dnl Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# This is adapted with modifications from upstream Autoconf here:
+# https://git.savannah.gnu.org/cgit/autoconf.git/tree/lib/autoconf/functions.m4?id=v2.70#n1455
+AC_DEFUN([_AC_FUNC_REALLOC_IF],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])dnl for cross-compiles
+  AC_CACHE_CHECK([whether realloc (0, 0) returns nonnull],
+    [ac_cv_func_realloc_0_nonnull],
+    [AC_RUN_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <stdlib.h>
+          ]],
+          [[void *p = realloc (0, 0);
+            int result = !p;
+            free (p);
+            return result;]])
+       ],
+       [ac_cv_func_realloc_0_nonnull=yes],
+       [ac_cv_func_realloc_0_nonnull=no],
+       [case "$host_os" in
+          # Guess yes on platforms where we know the result.
+          *-gnu* | freebsd* | netbsd* | openbsd* | bitrig* \
+          | gnu* | *-musl* | midnightbsd* \
+          | hpux* | solaris* | cygwin* | mingw* | msys* )
+            ac_cv_func_realloc_0_nonnull="guessing yes" ;;
+          # If we don't know, obey --enable-cross-guesses.
+          *) ac_cv_func_realloc_0_nonnull="$gl_cross_guess_normal" ;;
+        esac
+       ])
+    ])
+  AS_CASE([$ac_cv_func_realloc_0_nonnull], [*yes], [$1], [$2])
+])# AC_FUNC_REALLOC
+
+# gl_FUNC_REALLOC_GNU
+# -------------------
+# Replace realloc if it is not compatible with GNU libc.
+AC_DEFUN([gl_FUNC_REALLOC_GNU],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_REALLOC_POSIX])
+  if test $REPLACE_REALLOC = 0; then
+    _AC_FUNC_REALLOC_IF([], [REPLACE_REALLOC=1])
+  fi
+])# gl_FUNC_REALLOC_GNU
+
+# gl_FUNC_REALLOC_POSIX
+# ---------------------
+# Test whether 'realloc' is POSIX compliant (sets errno to ENOMEM when it
+# fails, and doesn't mess up with ptrdiff_t overflow),
+# and replace realloc if it is not.
+AC_DEFUN([gl_FUNC_REALLOC_POSIX],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_MALLOC_POSIX])
+  if test $REPLACE_MALLOC = 1; then
+    REPLACE_REALLOC=1
+  fi
+])
diff --git a/src/grep/m4/reallocarray.m4 b/src/grep/m4/reallocarray.m4
new file mode 100644
index 0000000..9d8a626
--- /dev/null
+++ b/src/grep/m4/reallocarray.m4
@@ -0,0 +1,23 @@
+# reallocarray.m4 serial 3
+dnl Copyright (C) 2017-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_REALLOCARRAY],
+[
+  dnl Persuade glibc <stdlib.h> to declare reallocarray.
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([gl_CHECK_MALLOC_PTRDIFF])
+  AC_CHECK_FUNCS([reallocarray])
+  if test "$ac_cv_func_reallocarray" = no; then
+    HAVE_REALLOCARRAY=0
+  elif test "$gl_cv_malloc_ptrdiff" = no; then
+    REPLACE_REALLOCARRAY=1
+  fi
+])
+
+# Prerequisites of lib/reallocarray.c.
+AC_DEFUN([gl_PREREQ_REALLOCARRAY], [:])
diff --git a/src/grep/m4/regex.m4 b/src/grep/m4/regex.m4
new file mode 100644
index 0000000..1c7e562
--- /dev/null
+++ b/src/grep/m4/regex.m4
@@ -0,0 +1,396 @@
+# serial 73
+
+# Copyright (C) 1996-2001, 2003-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+dnl Initially derived from code in GNU grep.
+dnl Mostly written by Jim Meyering.
+
+AC_PREREQ([2.50])
+
+AC_DEFUN([gl_REGEX],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_ARG_WITH([included-regex],
+    [AS_HELP_STRING([--without-included-regex],
+                    [don't compile regex; this is the default on systems
+                     with recent-enough versions of the GNU C Library
+                     (use with caution on other systems).])])
+
+  case $with_included_regex in #(
+  yes|no) ac_use_included_regex=$with_included_regex
+        ;;
+  '')
+    # If the system regex support is good enough that it passes the
+    # following run test, then default to *not* using the included regex.c.
+    # If cross compiling, assume the test would fail and use the included
+    # regex.c.
+    AC_CHECK_DECLS_ONCE([alarm])
+    AC_CHECK_HEADERS_ONCE([malloc.h])
+    AC_CACHE_CHECK([for working re_compile_pattern],
+                   [gl_cv_func_re_compile_pattern_working],
+      [AC_RUN_IFELSE(
+        [AC_LANG_PROGRAM(
+          [[#include <regex.h>
+
+            #include <locale.h>
+            #include <limits.h>
+            #include <string.h>
+
+            #if defined M_CHECK_ACTION || HAVE_DECL_ALARM
+            # include <signal.h>
+            # include <unistd.h>
+            #endif
+
+            #if HAVE_MALLOC_H
+            # include <malloc.h>
+            #endif
+
+            #ifdef M_CHECK_ACTION
+            /* Exit with distinguishable exit code.  */
+            static void sigabrt_no_core (int sig) { raise (SIGTERM); }
+            #endif
+          ]],
+          [[int result = 0;
+            static struct re_pattern_buffer regex;
+            unsigned char folded_chars[UCHAR_MAX + 1];
+            int i;
+            const char *s;
+            struct re_registers regs;
+
+            /* Some builds of glibc go into an infinite loop on this
+               test.  Use alarm to force death, and mallopt to avoid
+               malloc recursion in diagnosing the corrupted heap. */
+#if HAVE_DECL_ALARM
+            signal (SIGALRM, SIG_DFL);
+            alarm (2);
+#endif
+#ifdef M_CHECK_ACTION
+            signal (SIGABRT, sigabrt_no_core);
+            mallopt (M_CHECK_ACTION, 2);
+#endif
+
+            if (setlocale (LC_ALL, "en_US.UTF-8"))
+              {
+                {
+                  /* https://sourceware.org/ml/libc-hacker/2006-09/msg00008.html
+                     This test needs valgrind to catch the bug on Debian
+                     GNU/Linux 3.1 x86, but it might catch the bug better
+                     on other platforms and it shouldn't hurt to try the
+                     test here.  */
+                  static char const pat[] = "insert into";
+                  static char const data[] =
+                    "\xFF\0\x12\xA2\xAA\xC4\xB1,K\x12\xC4\xB1*\xACK";
+                  re_set_syntax (RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE
+                                 | RE_ICASE);
+                  memset (&regex, 0, sizeof regex);
+                  s = re_compile_pattern (pat, sizeof pat - 1, &regex);
+                  if (s)
+                    result |= 1;
+                  else
+                    {
+                      if (re_search (&regex, data, sizeof data - 1,
+                                     0, sizeof data - 1, &regs)
+                          != -1)
+                        result |= 1;
+                      regfree (&regex);
+                    }
+                }
+
+                {
+                  /* This test is from glibc bug 15078.
+                     The test case is from Andreas Schwab in
+                     <https://sourceware.org/ml/libc-alpha/2013-01/msg00967.html>.
+                     */
+                  static char const pat[] = "[^x]x";
+                  static char const data[] =
+                    /* <U1000><U103B><U103D><U1014><U103A><U102F><U1015><U103A> */
+                    "\xe1\x80\x80"
+                    "\xe1\x80\xbb"
+                    "\xe1\x80\xbd"
+                    "\xe1\x80\x94"
+                    "\xe1\x80\xba"
+                    "\xe1\x80\xaf"
+                    "\xe1\x80\x95"
+                    "\xe1\x80\xba"
+                    "x";
+                  re_set_syntax (0);
+                  memset (&regex, 0, sizeof regex);
+                  s = re_compile_pattern (pat, sizeof pat - 1, &regex);
+                  if (s)
+                    result |= 1;
+                  else
+                    {
+                      i = re_search (&regex, data, sizeof data - 1,
+                                     0, sizeof data - 1, 0);
+                      if (i != 0 && i != 21)
+                        result |= 1;
+                      regfree (&regex);
+                    }
+                }
+
+                if (! setlocale (LC_ALL, "C"))
+                  return 1;
+              }
+
+            /* This test is from glibc bug 3957, reported by Andrew Mackey.  */
+            re_set_syntax (RE_SYNTAX_EGREP | RE_HAT_LISTS_NOT_NEWLINE);
+            memset (&regex, 0, sizeof regex);
+            s = re_compile_pattern ("a[^x]b", 6, &regex);
+            if (s)
+              result |= 2;
+            else
+              {
+                /* This should fail, but succeeds for glibc-2.5.  */
+                if (re_search (&regex, "a\nb", 3, 0, 3, &regs) != -1)
+                  result |= 2;
+                regfree (&regex);
+              }
+
+            /* This regular expression is from Spencer ere test number 75
+               in grep-2.3.  */
+            re_set_syntax (RE_SYNTAX_POSIX_EGREP);
+            memset (&regex, 0, sizeof regex);
+            for (i = 0; i <= UCHAR_MAX; i++)
+              folded_chars[i] = i;
+            regex.translate = folded_chars;
+            s = re_compile_pattern ("a[[:@:>@:]]b\n", 11, &regex);
+            /* This should fail with _Invalid character class name_ error.  */
+            if (!s)
+              {
+                result |= 4;
+                regfree (&regex);
+              }
+
+            /* Ensure that [b-a] is diagnosed as invalid, when
+               using RE_NO_EMPTY_RANGES. */
+            re_set_syntax (RE_SYNTAX_POSIX_EGREP | RE_NO_EMPTY_RANGES);
+            memset (&regex, 0, sizeof regex);
+            s = re_compile_pattern ("a[b-a]", 6, &regex);
+            if (s == 0)
+              {
+                result |= 8;
+                regfree (&regex);
+              }
+
+            /* This should succeed, but does not for glibc-2.1.3.  */
+            memset (&regex, 0, sizeof regex);
+            s = re_compile_pattern ("{1", 2, &regex);
+            if (s)
+              result |= 8;
+            else
+              regfree (&regex);
+
+            /* The following example is derived from a problem report
+               against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>.  */
+            memset (&regex, 0, sizeof regex);
+            s = re_compile_pattern ("[an\371]*n", 7, &regex);
+            if (s)
+              result |= 8;
+            else
+              {
+                /* This should match, but does not for glibc-2.2.1.  */
+                if (re_match (&regex, "an", 2, 0, &regs) != 2)
+                  result |= 8;
+                else
+                  {
+                    free (regs.start);
+                    free (regs.end);
+                  }
+                regfree (&regex);
+              }
+
+            memset (&regex, 0, sizeof regex);
+            s = re_compile_pattern ("x", 1, &regex);
+            if (s)
+              result |= 8;
+            else
+              {
+                /* glibc-2.2.93 does not work with a negative RANGE argument.  */
+                if (re_search (&regex, "wxy", 3, 2, -2, &regs) != 1)
+                  result |= 8;
+                else
+                  {
+                    free (regs.start);
+                    free (regs.end);
+                  }
+                regfree (&regex);
+              }
+
+            /* The version of regex.c in older versions of gnulib
+               ignored RE_ICASE.  Detect that problem too.  */
+            re_set_syntax (RE_SYNTAX_EMACS | RE_ICASE);
+            memset (&regex, 0, sizeof regex);
+            s = re_compile_pattern ("x", 1, &regex);
+            if (s)
+              result |= 16;
+            else
+              {
+                if (re_search (&regex, "WXY", 3, 0, 3, &regs) < 0)
+                  result |= 16;
+                else
+                  {
+                    free (regs.start);
+                    free (regs.end);
+                  }
+                regfree (&regex);
+              }
+
+            /* Catch a bug reported by Vin Shelton in
+               https://lists.gnu.org/r/bug-coreutils/2007-06/msg00089.html
+               */
+            re_set_syntax (RE_SYNTAX_POSIX_BASIC
+                           & ~RE_CONTEXT_INVALID_DUP
+                           & ~RE_NO_EMPTY_RANGES);
+            memset (&regex, 0, sizeof regex);
+            s = re_compile_pattern ("[[:alnum:]_-]\\\\+\$", 16, &regex);
+            if (s)
+              result |= 32;
+            else
+              regfree (&regex);
+
+            /* REG_STARTEND was added to glibc on 2004-01-15.
+               Reject older versions.  */
+            if (! REG_STARTEND)
+              result |= 64;
+
+            /* Matching with the compiled form of this regexp would provoke
+               an assertion failure prior to glibc-2.28:
+                 regexec.c:1375: pop_fail_stack: Assertion 'num >= 0' failed
+               With glibc-2.28, compilation fails and reports the invalid
+               back reference.  */
+            re_set_syntax (RE_SYNTAX_POSIX_EGREP);
+            memset (&regex, 0, sizeof regex);
+            s = re_compile_pattern ("0|()0|\\\\1|0", 10, &regex);
+            if (!s)
+              {
+                memset (&regs, 0, sizeof regs);
+                i = re_search (&regex, "x", 1, 0, 1, &regs);
+                if (i != -1)
+                  result |= 64;
+                if (0 <= i)
+                  {
+                    free (regs.start);
+                    free (regs.end);
+                  }
+                regfree (&regex);
+              }
+            else
+              {
+                if (strcmp (s, "Invalid back reference"))
+                  result |= 64;
+              }
+
+            /* glibc bug 11053.  */
+            re_set_syntax (RE_SYNTAX_POSIX_BASIC);
+            memset (&regex, 0, sizeof regex);
+            static char const pat_sub2[] = "\\\\(a*\\\\)*a*\\\\1";
+            s = re_compile_pattern (pat_sub2, sizeof pat_sub2 - 1, &regex);
+            if (s)
+              result |= 64;
+            else
+              {
+                memset (&regs, 0, sizeof regs);
+                static char const data[] = "a";
+                int datalen = sizeof data - 1;
+                i = re_search (&regex, data, datalen, 0, datalen, &regs);
+                if (i != 0)
+                  result |= 64;
+                else if (regs.num_regs < 2)
+                  result |= 64;
+                else if (! (regs.start[0] == 0 && regs.end[0] == 1))
+                  result |= 64;
+                else if (! (regs.start[1] == 0 && regs.end[1] == 0))
+                  result |= 64;
+                regfree (&regex);
+                free (regs.start);
+                free (regs.end);
+              }
+
+#if 0
+            /* It would be nice to reject hosts whose regoff_t values are too
+               narrow (including glibc on hosts with 64-bit ptrdiff_t and
+               32-bit int), but we should wait until glibc implements this
+               feature.  Otherwise, support for equivalence classes and
+               multibyte collation symbols would always be broken except
+               when compiling --without-included-regex.   */
+            if (sizeof (regoff_t) < sizeof (ptrdiff_t)
+                || sizeof (regoff_t) < sizeof (ssize_t))
+              result |= 64;
+#endif
+
+            return result;
+          ]])],
+        [gl_cv_func_re_compile_pattern_working=yes],
+        [gl_cv_func_re_compile_pattern_working=no],
+        [case "$host_os" in
+                   # Guess no on native Windows.
+           mingw*) gl_cv_func_re_compile_pattern_working="guessing no" ;;
+                   # Otherwise obey --enable-cross-guesses.
+           *)      gl_cv_func_re_compile_pattern_working="$gl_cross_guess_normal" ;;
+         esac
+        ])
+      ])
+    case "$gl_cv_func_re_compile_pattern_working" in #(
+      *yes) ac_use_included_regex=no;; #(
+      *no) ac_use_included_regex=yes;;
+    esac
+    ;;
+  *) AC_MSG_ERROR([Invalid value for --with-included-regex: $with_included_regex])
+    ;;
+  esac
+
+  if test $ac_use_included_regex = yes; then
+    AC_DEFINE([_REGEX_INCLUDE_LIMITS_H], [1],
+      [Define if you want <regex.h> to include <limits.h>, so that it
+       consistently overrides <limits.h>'s RE_DUP_MAX.])
+    AC_DEFINE([_REGEX_LARGE_OFFSETS], [1],
+      [Define if you want regoff_t to be at least as wide POSIX requires.])
+    AC_DEFINE([re_syntax_options], [rpl_re_syntax_options],
+      [Define to rpl_re_syntax_options if the replacement should be used.])
+    AC_DEFINE([re_set_syntax], [rpl_re_set_syntax],
+      [Define to rpl_re_set_syntax if the replacement should be used.])
+    AC_DEFINE([re_compile_pattern], [rpl_re_compile_pattern],
+      [Define to rpl_re_compile_pattern if the replacement should be used.])
+    AC_DEFINE([re_compile_fastmap], [rpl_re_compile_fastmap],
+      [Define to rpl_re_compile_fastmap if the replacement should be used.])
+    AC_DEFINE([re_search], [rpl_re_search],
+      [Define to rpl_re_search if the replacement should be used.])
+    AC_DEFINE([re_search_2], [rpl_re_search_2],
+      [Define to rpl_re_search_2 if the replacement should be used.])
+    AC_DEFINE([re_match], [rpl_re_match],
+      [Define to rpl_re_match if the replacement should be used.])
+    AC_DEFINE([re_match_2], [rpl_re_match_2],
+      [Define to rpl_re_match_2 if the replacement should be used.])
+    AC_DEFINE([re_set_registers], [rpl_re_set_registers],
+      [Define to rpl_re_set_registers if the replacement should be used.])
+    AC_DEFINE([re_comp], [rpl_re_comp],
+      [Define to rpl_re_comp if the replacement should be used.])
+    AC_DEFINE([re_exec], [rpl_re_exec],
+      [Define to rpl_re_exec if the replacement should be used.])
+    AC_DEFINE([regcomp], [rpl_regcomp],
+      [Define to rpl_regcomp if the replacement should be used.])
+    AC_DEFINE([regexec], [rpl_regexec],
+      [Define to rpl_regexec if the replacement should be used.])
+    AC_DEFINE([regerror], [rpl_regerror],
+      [Define to rpl_regerror if the replacement should be used.])
+    AC_DEFINE([regfree], [rpl_regfree],
+      [Define to rpl_regfree if the replacement should be used.])
+  fi
+])
+
+# Prerequisites of lib/regex.c and lib/regex_internal.c.
+AC_DEFUN([gl_PREREQ_REGEX],
+[
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+  AC_REQUIRE([AC_C_INLINE])
+  AC_REQUIRE([AC_C_RESTRICT])
+  AC_REQUIRE([AC_TYPE_MBSTATE_T])
+  AC_REQUIRE([gl_EEMALLOC])
+  AC_CHECK_HEADERS([libintl.h])
+  AC_CHECK_FUNCS_ONCE([isblank iswctype])
+  AC_CHECK_DECLS([isblank], [], [], [[#include <ctype.h>]])
+])
diff --git a/src/grep/m4/safe-read.m4 b/src/grep/m4/safe-read.m4
new file mode 100644
index 0000000..3cba288
--- /dev/null
+++ b/src/grep/m4/safe-read.m4
@@ -0,0 +1,12 @@
+# safe-read.m4 serial 6
+dnl Copyright (C) 2002-2003, 2005-2006, 2009-2021 Free Software Foundation,
+dnl Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# Prerequisites of lib/safe-read.c.
+AC_DEFUN([gl_PREREQ_SAFE_READ],
+[
+  AC_REQUIRE([gt_TYPE_SSIZE_T])
+])
diff --git a/src/grep/m4/save-cwd.m4 b/src/grep/m4/save-cwd.m4
new file mode 100644
index 0000000..74cfe96
--- /dev/null
+++ b/src/grep/m4/save-cwd.m4
@@ -0,0 +1,11 @@
+# serial 10
+dnl Copyright (C) 2002-2006, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Prerequisites for lib/save-cwd.c.
+AC_DEFUN([gl_SAVE_CWD],
+[
+  AC_CHECK_FUNCS_ONCE([fchdir])
+])
diff --git a/src/grep/m4/sched_h.m4 b/src/grep/m4/sched_h.m4
new file mode 100644
index 0000000..a840e3d
--- /dev/null
+++ b/src/grep/m4/sched_h.m4
@@ -0,0 +1,106 @@
+# sched_h.m4 serial 15
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Written by Bruno Haible.
+
+AC_DEFUN_ONCE([gl_SCHED_H],
+[
+  dnl Ensure to expand the default settings once only, before all statements
+  dnl that occur in other macros.
+  AC_REQUIRE([gl_SCHED_H_DEFAULTS])
+
+  AC_REQUIRE([AC_CANONICAL_HOST])
+
+  AC_CHECK_HEADERS_ONCE([sys/cdefs.h])
+  AC_CHECK_HEADERS([sched.h], [], [],
+    [[#if HAVE_SYS_CDEFS_H
+       #include <sys/cdefs.h>
+      #endif
+    ]])
+  gl_NEXT_HEADERS([sched.h])
+
+  if test "$ac_cv_header_sched_h" = yes; then
+    HAVE_SCHED_H=1
+  else
+    HAVE_SCHED_H=0
+  fi
+  AC_SUBST([HAVE_SCHED_H])
+
+  if test "$HAVE_SCHED_H" = 1; then
+    AC_CHECK_TYPE([struct sched_param],
+      [HAVE_STRUCT_SCHED_PARAM=1], [HAVE_STRUCT_SCHED_PARAM=0],
+      [[#if HAVE_SYS_CDEFS_H
+         #include <sys/cdefs.h>
+        #endif
+        #include <sched.h>
+      ]])
+  else
+    HAVE_STRUCT_SCHED_PARAM=0
+    case "$host_os" in
+      os2*)
+        dnl On OS/2 kLIBC, struct sched_param is in spawn.h.
+        AC_CHECK_TYPE([struct sched_param],
+          [HAVE_STRUCT_SCHED_PARAM=1], [],
+          [#include <spawn.h>])
+        ;;
+      vms)
+        dnl On OpenVMS 7.2 or newer, struct sched_param is in pthread.h.
+        AC_CHECK_TYPE([struct sched_param],
+          [HAVE_STRUCT_SCHED_PARAM=1], [],
+          [#include <pthread.h>])
+        ;;
+    esac
+  fi
+  AC_SUBST([HAVE_STRUCT_SCHED_PARAM])
+
+  if test "$ac_cv_header_sys_cdefs_h" = yes; then
+    HAVE_SYS_CDEFS_H=1
+  else
+    HAVE_SYS_CDEFS_H=0
+  fi
+  AC_SUBST([HAVE_SYS_CDEFS_H])
+
+  dnl Ensure the type pid_t gets defined.
+  AC_REQUIRE([AC_TYPE_PID_T])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use, if it is not common
+  dnl enough to be declared everywhere.
+  gl_WARN_ON_USE_PREPARE([[#include <sched.h>
+    ]], [sched_yield])
+])
+
+# gl_SCHED_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_SCHED_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_SCHED_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_SCHED_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_SCHED_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SCHED_YIELD])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_SCHED_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_SCHED_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_SCHED_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_SCHED_YIELD=1;    AC_SUBST([HAVE_SCHED_YIELD])
+  REPLACE_SCHED_YIELD=0; AC_SUBST([REPLACE_SCHED_YIELD])
+])
diff --git a/src/grep/m4/select.m4 b/src/grep/m4/select.m4
new file mode 100644
index 0000000..72c068f
--- /dev/null
+++ b/src/grep/m4/select.m4
@@ -0,0 +1,117 @@
+# select.m4 serial 13
+dnl Copyright (C) 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_SELECT],
+[
+  AC_REQUIRE([gl_SYS_SELECT_H])
+  AC_REQUIRE([AC_C_RESTRICT])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_REQUIRE([gl_SOCKETS])
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    REPLACE_SELECT=1
+  else
+    dnl On Interix 3.5, select(0, NULL, NULL, NULL, timeout) fails with error
+    dnl EFAULT.
+    AC_CHECK_HEADERS_ONCE([sys/select.h])
+    AC_CACHE_CHECK([whether select supports a 0 argument],
+      [gl_cv_func_select_supports0],
+      [
+        AC_RUN_IFELSE([AC_LANG_SOURCE([[
+#include <sys/types.h>
+#include <sys/time.h>
+#if HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+int main ()
+{
+  struct timeval timeout;
+  timeout.tv_sec = 0;
+  timeout.tv_usec = 5;
+  return select (0, (fd_set *)0, (fd_set *)0, (fd_set *)0, &timeout) < 0;
+}]])], [gl_cv_func_select_supports0=yes], [gl_cv_func_select_supports0=no],
+          [
+changequote(,)dnl
+           case "$host_os" in
+                       # Guess no on Interix.
+             interix*) gl_cv_func_select_supports0="guessing no";;
+                       # Guess yes otherwise.
+             *)        gl_cv_func_select_supports0="guessing yes";;
+           esac
+changequote([,])dnl
+          ])
+      ])
+    case "$gl_cv_func_select_supports0" in
+      *yes) ;;
+      *) REPLACE_SELECT=1 ;;
+    esac
+
+    dnl On FreeBSD 8.2, select() doesn't always reject bad fds.
+    AC_CACHE_CHECK([whether select detects invalid fds],
+      [gl_cv_func_select_detects_ebadf],
+      [
+        AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <sys/time.h>
+#if HAVE_SYS_SELECT_H
+# include <sys/select.h>
+#endif
+#include <unistd.h>
+#include <errno.h>
+]GL_MDA_DEFINES],
+[[
+  fd_set set;
+  dup2(0, 16);
+  FD_ZERO(&set);
+  FD_SET(16, &set);
+  close(16);
+  struct timeval timeout;
+  timeout.tv_sec = 0;
+  timeout.tv_usec = 5;
+  return select (17, &set, NULL, NULL, &timeout) != -1 || errno != EBADF;
+]])], [gl_cv_func_select_detects_ebadf=yes],
+      [gl_cv_func_select_detects_ebadf=no],
+          [
+           case "$host_os" in
+                             # Guess yes on Linux systems.
+            linux-* | linux) gl_cv_func_select_detects_ebadf="guessing yes" ;;
+                             # Guess yes on glibc systems.
+            *-gnu* | gnu*)   gl_cv_func_select_detects_ebadf="guessing yes" ;;
+                             # If we don't know, obey --enable-cross-guesses.
+            *)               gl_cv_func_select_detects_ebadf="$gl_cross_guess_normal" ;;
+           esac
+          ])
+      ])
+    case $gl_cv_func_select_detects_ebadf in
+      *yes) ;;
+      *) REPLACE_SELECT=1 ;;
+    esac
+  fi
+
+  dnl Determine the needed libraries.
+  LIB_SELECT="$LIBSOCKET"
+  if test $REPLACE_SELECT = 1; then
+    case "$host_os" in
+      mingw*)
+        dnl On the MSVC platform, the function MsgWaitForMultipleObjects
+        dnl (used in lib/select.c) requires linking with -luser32. On mingw,
+        dnl it is implicit.
+        AC_LINK_IFELSE(
+          [AC_LANG_SOURCE([[
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+int
+main ()
+{
+  MsgWaitForMultipleObjects (0, NULL, 0, 0, 0);
+  return 0;
+}]])],
+          [],
+          [LIB_SELECT="$LIB_SELECT -luser32"])
+        ;;
+    esac
+  fi
+  AC_SUBST([LIB_SELECT])
+])
diff --git a/src/grep/m4/setenv.m4 b/src/grep/m4/setenv.m4
new file mode 100644
index 0000000..f79a278
--- /dev/null
+++ b/src/grep/m4/setenv.m4
@@ -0,0 +1,166 @@
+# setenv.m4 serial 30
+dnl Copyright (C) 2001-2004, 2006-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_SETENV],
+[
+  AC_REQUIRE([gl_FUNC_SETENV_SEPARATE])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  if test $ac_cv_func_setenv = no; then
+    HAVE_SETENV=0
+  else
+    AC_CACHE_CHECK([whether setenv validates arguments],
+      [gl_cv_func_setenv_works],
+      [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+       #include <stdlib.h>
+       #include <errno.h>
+       #include <string.h>
+      ]], [[
+       int result = 0;
+       {
+         if (setenv ("", "", 0) != -1)
+           result |= 1;
+         else if (errno != EINVAL)
+           result |= 2;
+       }
+       {
+         if (setenv ("a", "=", 1) != 0)
+           result |= 4;
+         else if (strcmp (getenv ("a"), "=") != 0)
+           result |= 8;
+       }
+       return result;
+      ]])],
+      [gl_cv_func_setenv_works=yes], [gl_cv_func_setenv_works=no],
+      [case "$host_os" in
+                        # Guess yes on glibc systems.
+         *-gnu* | gnu*) gl_cv_func_setenv_works="guessing yes" ;;
+                        # Guess yes on musl systems.
+         *-musl*)       gl_cv_func_setenv_works="guessing yes" ;;
+                        # If we don't know, obey --enable-cross-guesses.
+         *)             gl_cv_func_setenv_works="$gl_cross_guess_normal" ;;
+       esac
+      ])])
+    case "$gl_cv_func_setenv_works" in
+      *yes) ;;
+      *)
+        REPLACE_SETENV=1
+        ;;
+    esac
+  fi
+])
+
+# Like gl_FUNC_SETENV, except prepare for separate compilation
+# (no REPLACE_SETENV, no AC_LIBOBJ).
+AC_DEFUN([gl_FUNC_SETENV_SEPARATE],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_CHECK_DECLS_ONCE([setenv])
+  if test $ac_cv_have_decl_setenv = no; then
+    HAVE_DECL_SETENV=0
+  fi
+  AC_CHECK_FUNCS_ONCE([setenv])
+  gl_PREREQ_SETENV
+])
+
+AC_DEFUN([gl_FUNC_UNSETENV],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CHECK_DECLS_ONCE([unsetenv])
+  if test $ac_cv_have_decl_unsetenv = no; then
+    HAVE_DECL_UNSETENV=0
+  fi
+  AC_CHECK_FUNCS([unsetenv])
+  if test $ac_cv_func_unsetenv = no; then
+    HAVE_UNSETENV=0
+  else
+    HAVE_UNSETENV=1
+    dnl Some BSDs return void, failing to do error checking.
+    AC_CACHE_CHECK([for unsetenv() return type], [gt_cv_func_unsetenv_ret],
+      [AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[
+#undef _BSD
+#define _BSD 1 /* unhide unsetenv declaration in OSF/1 5.1 <stdlib.h> */
+#include <stdlib.h>
+extern
+#ifdef __cplusplus
+"C"
+#endif
+int unsetenv (const char *name);
+            ]],
+            [[]])],
+         [gt_cv_func_unsetenv_ret='int'],
+         [gt_cv_func_unsetenv_ret='void'])])
+    if test $gt_cv_func_unsetenv_ret = 'void'; then
+      AC_DEFINE([VOID_UNSETENV], [1], [Define to 1 if unsetenv returns void
+       instead of int.])
+      REPLACE_UNSETENV=1
+    fi
+
+    dnl Solaris 10 unsetenv does not remove all copies of a name.
+    dnl Haiku alpha 2 unsetenv gets confused by assignment to environ.
+    dnl OpenBSD 4.7 unsetenv("") does not fail.
+    AC_CACHE_CHECK([whether unsetenv obeys POSIX],
+      [gl_cv_func_unsetenv_works],
+      [AC_RUN_IFELSE(
+         [AC_LANG_PROGRAM([[
+            #include <stdlib.h>
+            #include <errno.h>
+            extern char **environ;
+           ]GL_MDA_DEFINES],
+           [[
+            char entry1[] = "a=1";
+            char entry2[] = "b=2";
+            char *env[] = { entry1, entry2, NULL };
+            if (putenv ((char *) "a=1")) return 1;
+            if (putenv (entry2)) return 2;
+            entry2[0] = 'a';
+            unsetenv ("a");
+            if (getenv ("a")) return 3;
+            if (!unsetenv ("") || errno != EINVAL) return 4;
+            entry2[0] = 'b';
+            environ = env;
+            if (!getenv ("a")) return 5;
+            entry2[0] = 'a';
+            unsetenv ("a");
+            if (getenv ("a")) return 6;
+           ]])],
+         [gl_cv_func_unsetenv_works=yes],
+         [gl_cv_func_unsetenv_works=no],
+         [case "$host_os" in
+                    # Guess yes on glibc systems.
+            *-gnu*) gl_cv_func_unsetenv_works="guessing yes" ;;
+                    # If we don't know, obey --enable-cross-guesses.
+            *)      gl_cv_func_unsetenv_works="$gl_cross_guess_normal" ;;
+          esac
+         ])
+      ])
+    case "$gl_cv_func_unsetenv_works" in
+      *yes) ;;
+      *)
+        REPLACE_UNSETENV=1
+        ;;
+    esac
+  fi
+])
+
+# Prerequisites of lib/setenv.c.
+AC_DEFUN([gl_PREREQ_SETENV],
+[
+  AC_REQUIRE([AC_FUNC_ALLOCA])
+  AC_REQUIRE([gl_ENVIRON])
+  AC_CHECK_HEADERS_ONCE([unistd.h])
+  AC_CHECK_HEADERS([search.h])
+  AC_CHECK_FUNCS([tsearch])
+])
+
+# Prerequisites of lib/unsetenv.c.
+AC_DEFUN([gl_PREREQ_UNSETENV],
+[
+  AC_REQUIRE([gl_ENVIRON])
+  AC_CHECK_HEADERS_ONCE([unistd.h])
+])
diff --git a/src/grep/m4/setlocale.m4 b/src/grep/m4/setlocale.m4
new file mode 100644
index 0000000..305dcaa
--- /dev/null
+++ b/src/grep/m4/setlocale.m4
@@ -0,0 +1,85 @@
+# setlocale.m4 serial 7
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_SETLOCALE],
+[
+  AC_REQUIRE([gl_LOCALE_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_SETLOCALE_NULL])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+
+  dnl Test whether we need to improve on the general working of setlocale.
+  NEED_SETLOCALE_IMPROVED=0
+  case "$host_os" in
+    dnl On native Windows systems, setlocale(category,NULL) does not look at
+    dnl the environment variables LC_ALL, category, and LANG.
+    mingw*) NEED_SETLOCALE_IMPROVED=1 ;;
+    dnl On Cygwin 1.5.x, setlocale always succeeds but setlocale(LC_CTYPE,NULL)
+    dnl is then still "C".
+    cygwin*)
+      case `uname -r` in
+        1.5.*) NEED_SETLOCALE_IMPROVED=1 ;;
+      esac
+      ;;
+    dnl On Android 4.3, setlocale(category,"C") always fails.
+    *)
+      AC_CACHE_CHECK([whether setlocale supports the C locale],
+        [gl_cv_func_setlocale_works],
+        [AC_RUN_IFELSE(
+           [AC_LANG_SOURCE([[
+#include <locale.h>
+int main ()
+{
+  return setlocale (LC_ALL, "C") == NULL;
+}]])],
+           [gl_cv_func_setlocale_works=yes],
+           [gl_cv_func_setlocale_works=no],
+           [case "$host_os" in
+                               # Guess no on Android.
+              linux*-android*) gl_cv_func_setlocale_works="guessing no";;
+                               # Guess yes otherwise.
+              *)               gl_cv_func_setlocale_works="guessing yes";;
+            esac
+           ])
+        ])
+      case "$gl_cv_func_setlocale_works" in
+        *yes) ;;
+        *) NEED_SETLOCALE_IMPROVED=1 ;;
+      esac
+      ;;
+  esac
+  AC_DEFINE_UNQUOTED([NEED_SETLOCALE_IMPROVED], [$NEED_SETLOCALE_IMPROVED],
+    [Define to 1 to enable general improvements of setlocale.])
+
+  dnl Test whether we need a multithread-safe setlocale(category,NULL).
+  NEED_SETLOCALE_MTSAFE=0
+  if test $SETLOCALE_NULL_ALL_MTSAFE = 0 || test $SETLOCALE_NULL_ONE_MTSAFE = 0; then
+    NEED_SETLOCALE_MTSAFE=1
+  fi
+  AC_DEFINE_UNQUOTED([NEED_SETLOCALE_MTSAFE], [$NEED_SETLOCALE_MTSAFE],
+    [Define to 1 to enable a multithread-safety fix of setlocale.])
+
+  if test $NEED_SETLOCALE_IMPROVED = 1 || test $NEED_SETLOCALE_MTSAFE = 1; then
+    REPLACE_SETLOCALE=1
+  fi
+
+  if test $NEED_SETLOCALE_MTSAFE = 1; then
+    LIB_SETLOCALE="$LIB_SETLOCALE_NULL"
+  else
+    LIB_SETLOCALE=
+  fi
+  dnl LIB_SETLOCALE is expected to be '-pthread' or '-lpthread' on AIX with gcc
+  dnl or xlc, and empty otherwise.
+  AC_SUBST([LIB_SETLOCALE])
+])
+
+# Prerequisites of lib/setlocale.c.
+AC_DEFUN([gl_PREREQ_SETLOCALE],
+[
+  dnl No need to check for CFLocaleCopyPreferredLanguages and
+  dnl CFPreferencesCopyAppValue because lib/setlocale.c is not used on Mac OS X.
+  dnl (The Mac OS X specific code is only used in libintl.)
+  :
+])
diff --git a/src/grep/m4/setlocale_null.m4 b/src/grep/m4/setlocale_null.m4
new file mode 100644
index 0000000..2c958ed
--- /dev/null
+++ b/src/grep/m4/setlocale_null.m4
@@ -0,0 +1,98 @@
+# setlocale_null.m4 serial 5
+dnl Copyright (C) 2019-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_SETLOCALE_NULL],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([gl_PTHREADLIB])
+  AC_CHECK_HEADERS_ONCE([threads.h])
+
+  AC_CACHE_CHECK([whether setlocale (LC_ALL, NULL) is multithread-safe],
+    [gl_cv_func_setlocale_null_all_mtsafe],
+    [case "$host_os" in
+       # Guess no on musl libc, macOS, FreeBSD, NetBSD, OpenBSD, AIX, Haiku, Cygwin.
+       *-musl* | darwin* | freebsd* | midnightbsd* | netbsd* | openbsd* | aix* | haiku* | cygwin*)
+         gl_cv_func_setlocale_null_all_mtsafe=no ;;
+       # Guess yes on glibc, HP-UX, IRIX, Solaris, native Windows.
+       *-gnu* | gnu* | hpux* | irix* | solaris* | mingw*)
+         gl_cv_func_setlocale_null_all_mtsafe=yes ;;
+       # If we don't know, obey --enable-cross-guesses.
+       *)
+         gl_cv_func_setlocale_null_all_mtsafe="$gl_cross_guess_normal" ;;
+     esac
+    ])
+  dnl On platforms without multithreading, there is no issue.
+  case "$host_os" in
+    mingw*) ;;
+    *)
+      if test $gl_pthread_api = no && test $ac_cv_header_threads_h = no; then
+        gl_cv_func_setlocale_null_all_mtsafe="trivially yes"
+      fi
+      ;;
+  esac
+  case "$gl_cv_func_setlocale_null_all_mtsafe" in
+    *yes) SETLOCALE_NULL_ALL_MTSAFE=1 ;;
+    *)    SETLOCALE_NULL_ALL_MTSAFE=0 ;;
+  esac
+  AC_DEFINE_UNQUOTED([SETLOCALE_NULL_ALL_MTSAFE], [$SETLOCALE_NULL_ALL_MTSAFE],
+    [Define to 1 if setlocale (LC_ALL, NULL) is multithread-safe.])
+
+  dnl This is about a single category (not LC_ALL).
+  AC_CACHE_CHECK([whether setlocale (category, NULL) is multithread-safe],
+    [gl_cv_func_setlocale_null_one_mtsafe],
+    [case "$host_os" in
+       # Guess no on OpenBSD, AIX.
+       openbsd* | aix*)
+         gl_cv_func_setlocale_null_one_mtsafe=no ;;
+       # Guess yes on glibc, musl libc, macOS, FreeBSD, NetBSD, HP-UX, IRIX, Solaris, Haiku, Cygwin, native Windows.
+       *-gnu* | gnu* | *-musl* | darwin* | freebsd* | midnightbsd* | netbsd* | hpux* | irix* | solaris* | haiku* | cygwin* | mingw*)
+         gl_cv_func_setlocale_null_one_mtsafe=yes ;;
+       # If we don't know, obey --enable-cross-guesses.
+       *)
+         gl_cv_func_setlocale_null_one_mtsafe="$gl_cross_guess_normal" ;;
+     esac
+    ])
+  dnl On platforms without multithreading, there is no issue.
+  case "$host_os" in
+    mingw*) ;;
+    *)
+      if test $gl_pthread_api = no && test $ac_cv_header_threads_h = no; then
+        gl_cv_func_setlocale_null_one_mtsafe="trivially yes"
+      fi
+      ;;
+  esac
+  case "$gl_cv_func_setlocale_null_one_mtsafe" in
+    *yes) SETLOCALE_NULL_ONE_MTSAFE=1 ;;
+    *)    SETLOCALE_NULL_ONE_MTSAFE=0 ;;
+  esac
+  AC_DEFINE_UNQUOTED([SETLOCALE_NULL_ONE_MTSAFE], [$SETLOCALE_NULL_ONE_MTSAFE],
+    [Define to 1 if setlocale (category, NULL) is multithread-safe.])
+
+  dnl Determine link dependencies of lib/setlocale_null.c and lib/setlocale-lock.c.
+  if test $SETLOCALE_NULL_ALL_MTSAFE = 0 || test $SETLOCALE_NULL_ONE_MTSAFE = 0; then
+    case "$host_os" in
+      mingw*) LIB_SETLOCALE_NULL= ;;
+      *)
+        gl_WEAK_SYMBOLS
+        case "$gl_cv_have_weak" in
+          *yes) LIB_SETLOCALE_NULL= ;;
+          *)    LIB_SETLOCALE_NULL="$LIBPTHREAD" ;;
+        esac
+        ;;
+    esac
+  else
+    LIB_SETLOCALE_NULL=
+  fi
+  dnl LIB_SETLOCALE_NULL is expected to be '-pthread' or '-lpthread' on AIX
+  dnl with gcc or xlc, and empty otherwise.
+  AC_SUBST([LIB_SETLOCALE_NULL])
+])
+
+# Prerequisites of lib/setlocale-lock.c.
+AC_DEFUN([gl_PREREQ_SETLOCALE_LOCK],
+[
+  gl_VISIBILITY
+])
diff --git a/src/grep/m4/sigaction.m4 b/src/grep/m4/sigaction.m4
new file mode 100644
index 0000000..a8c1d15
--- /dev/null
+++ b/src/grep/m4/sigaction.m4
@@ -0,0 +1,40 @@
+# sigaction.m4 serial 7
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# Determine if sigaction interface is present.
+AC_DEFUN([gl_SIGACTION],
+[
+  AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
+  AC_CHECK_FUNCS_ONCE([sigaction])
+  if test $ac_cv_func_sigaction = yes; then
+    AC_CHECK_MEMBERS([struct sigaction.sa_sigaction], , ,
+                     [[#include <signal.h>]])
+    if test $ac_cv_member_struct_sigaction_sa_sigaction = no; then
+      HAVE_STRUCT_SIGACTION_SA_SIGACTION=0
+    fi
+  else
+    HAVE_SIGACTION=0
+  fi
+])
+
+# Prerequisites of the part of lib/signal.in.h and of lib/sigaction.c.
+AC_DEFUN([gl_PREREQ_SIGACTION],
+[
+  AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
+  AC_REQUIRE([AC_C_RESTRICT])
+  AC_REQUIRE([AC_TYPE_UID_T])
+  AC_REQUIRE([gl_PREREQ_SIG_HANDLER_H])
+  AC_CHECK_FUNCS_ONCE([sigaltstack siginterrupt])
+  AC_CHECK_TYPES([siginfo_t], [], [], [[
+#include <signal.h>
+  ]])
+  if test $ac_cv_type_siginfo_t = no; then
+    HAVE_SIGINFO_T=0
+  fi
+])
+
+# Prerequisites of lib/sig-handler.h.
+AC_DEFUN([gl_PREREQ_SIG_HANDLER_H], [:])
diff --git a/src/grep/m4/sigaltstack.m4 b/src/grep/m4/sigaltstack.m4
new file mode 100644
index 0000000..6dbd677
--- /dev/null
+++ b/src/grep/m4/sigaltstack.m4
@@ -0,0 +1,197 @@
+# sigaltstack.m4 serial 15
+dnl Copyright (C) 2002-2021 Free Software Foundation, Inc.
+dnl This file is free software, distributed under the terms of the GNU
+dnl General Public License.  As a special exception to the GNU General
+dnl Public License, this file may be distributed as part of a program
+dnl that contains a configuration script generated by Autoconf, under
+dnl the same distribution terms as the rest of that program.
+
+dnl Written by Bruno Haible and Eric Blake.
+
+AC_DEFUN([SV_SIGALTSTACK],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+
+  AC_CHECK_FUNCS_ONCE([sigaltstack setrlimit])
+
+  if test "$ac_cv_func_sigaltstack" = yes; then
+    AC_CHECK_TYPE([stack_t], ,
+      [AC_DEFINE(stack_t, [struct sigaltstack],
+         [Define to 'struct sigaltstack' if that's the type of the argument to sigaltstack])
+      ],
+      [
+#include <signal.h>
+#if HAVE_SYS_SIGNAL_H
+# include <sys/signal.h>
+#endif
+      ])
+  fi
+
+  AC_CACHE_CHECK([for working sigaltstack], [sv_cv_sigaltstack], [
+    if test "$ac_cv_func_sigaltstack" = yes; then
+      case "$host_os" in
+        macos* | darwin[[6-9]]* | darwin[[1-9]][[0-9]]*)
+          # On MacOS X 10.2 or newer, just assume that if it compiles, it will
+          # work. If we were to perform the real test, 1 Crash Report dialog
+          # window would pop up.
+          AC_LINK_IFELSE([
+            AC_LANG_PROGRAM([[#include <signal.h>]],
+              [[int x = SA_ONSTACK; stack_t ss; sigaltstack ((stack_t*)0, &ss);]])],
+            [sv_cv_sigaltstack="guessing yes"],
+            [sv_cv_sigaltstack=no])
+          ;;
+        *)
+          AC_RUN_IFELSE([
+            AC_LANG_SOURCE([[
+#include <stdlib.h>
+#include <signal.h>
+#if HAVE_SYS_SIGNAL_H
+# include <sys/signal.h>
+#endif
+#if HAVE_SETRLIMIT
+# include <sys/types.h>
+# include <sys/time.h>
+# include <sys/resource.h>
+#endif
+void stackoverflow_handler (int sig)
+{
+  /* If we get here, the stack overflow was caught.  */
+  exit (0);
+}
+volatile int * recurse_1 (volatile int n, volatile int *p)
+{
+  if (n >= 0)
+    *recurse_1 (n + 1, p) += n;
+  return p;
+}
+int recurse (volatile int n)
+{
+  int sum = 0;
+  return *recurse_1 (n, &sum);
+}
+char mystack[2 * (1 << 24)];
+int main ()
+{
+  stack_t altstack;
+  struct sigaction action;
+#if defined HAVE_SETRLIMIT && defined RLIMIT_STACK
+  /* Before starting the endless recursion, try to be friendly to the user's
+     machine.  On some Linux 2.2.x systems, there is no stack limit for user
+     processes at all.  We don't want to kill such systems.  */
+  struct rlimit rl;
+  rl.rlim_cur = rl.rlim_max = 0x100000; /* 1 MB */
+  setrlimit (RLIMIT_STACK, &rl);
+#endif
+  /* Install the alternate stack.  Use the midpoint of mystack, to guard
+     against a buggy interpretation of ss_sp on IRIX.  */
+#ifdef SIGSTKSZ
+  if (sizeof mystack / 2 < SIGSTKSZ)
+    exit (3);
+#endif
+  altstack.ss_sp = mystack + sizeof mystack / 2;
+  altstack.ss_size = sizeof mystack / 2;
+  altstack.ss_flags = 0; /* no SS_DISABLE */
+  if (sigaltstack (&altstack, NULL) < 0)
+    exit (1);
+  /* Install the SIGSEGV handler.  */
+  sigemptyset (&action.sa_mask);
+  action.sa_handler = &stackoverflow_handler;
+  action.sa_flags = SA_ONSTACK;
+  sigaction (SIGSEGV, &action, (struct sigaction *) NULL);
+  sigaction (SIGBUS, &action, (struct sigaction *) NULL);
+  /* Provoke a stack overflow.  */
+  recurse (0);
+  exit (2);
+}]])],
+            [sv_cv_sigaltstack=yes],
+            [sv_cv_sigaltstack=no],
+            [
+              dnl FIXME: Put in some more known values here.
+              case "$host_os" in
+                *)
+                  AC_LINK_IFELSE([
+                    AC_LANG_PROGRAM([[#include <signal.h>]],
+                      [[int x = SA_ONSTACK; stack_t ss; sigaltstack ((stack_t*)0, &ss);]])],
+                    [sv_cv_sigaltstack="guessing yes"],
+                    [sv_cv_sigaltstack=no])
+                  ;;
+              esac
+            ])
+          ;;
+      esac
+    else
+      sv_cv_sigaltstack=no
+    fi
+  ])
+  if test "$sv_cv_sigaltstack" != no; then
+    AC_DEFINE([HAVE_WORKING_SIGALTSTACK], [1],
+      [Define if you have the sigaltstack() function and it works.])
+
+    dnl The ss_sp field of a stack_t is, according to POSIX, the lowest address
+    dnl of the memory block designated as an alternate stack. But IRIX 5.3
+    dnl interprets it as the highest address!
+    AC_CACHE_CHECK([for correct stack_t interpretation],
+      [sv_cv_sigaltstack_low_base], [
+      AC_RUN_IFELSE([
+        AC_LANG_SOURCE([[
+#include <stdlib.h>
+#include <signal.h>
+#if HAVE_SYS_SIGNAL_H
+# include <sys/signal.h>
+#endif
+volatile char *stack_lower_bound;
+volatile char *stack_upper_bound;
+static void check_stack_location (volatile char *addr)
+{
+  if (addr >= stack_lower_bound && addr <= stack_upper_bound)
+    exit (0);
+  else
+    exit (1);
+}
+static void stackoverflow_handler (int sig)
+{
+  char dummy;
+  check_stack_location (&dummy);
+}
+char mystack[2 * (1 << 24)];
+int main ()
+{
+  stack_t altstack;
+  struct sigaction action;
+  /* Install the alternate stack.  */
+  altstack.ss_sp = mystack + sizeof mystack / 2;
+  altstack.ss_size = sizeof mystack / 2;
+  stack_lower_bound = (char *) altstack.ss_sp;
+  stack_upper_bound = (char *) altstack.ss_sp + altstack.ss_size - 1;
+  altstack.ss_flags = 0; /* no SS_DISABLE */
+  if (sigaltstack (&altstack, NULL) < 0)
+    exit (2);
+  /* Install the SIGSEGV handler.  */
+  sigemptyset (&action.sa_mask);
+  action.sa_handler = &stackoverflow_handler;
+  action.sa_flags = SA_ONSTACK;
+  if (sigaction (SIGSEGV, &action, (struct sigaction *) NULL) < 0)
+    exit(3);
+  /* Provoke a SIGSEGV.  */
+  raise (SIGSEGV);
+  exit (3);
+}]])],
+      [sv_cv_sigaltstack_low_base=yes],
+      [sv_cv_sigaltstack_low_base=no],
+      [
+        dnl FIXME: Put in some more known values here.
+        case "$host_os" in
+          irix5*) sv_cv_sigaltstack_low_base="no" ;;
+          *)      sv_cv_sigaltstack_low_base="guessing yes" ;;
+        esac
+      ])
+    ])
+    if test "$sv_cv_sigaltstack_low_base" = no; then
+      AC_DEFINE([SIGALTSTACK_SS_REVERSED], [1],
+        [Define if sigaltstack() interprets the stack_t.ss_sp field incorrectly,
+         as the highest address of the alternate stack range rather than as the
+         lowest address.])
+    fi
+  fi
+])
diff --git a/src/grep/m4/signal_h.m4 b/src/grep/m4/signal_h.m4
new file mode 100644
index 0000000..8b93880
--- /dev/null
+++ b/src/grep/m4/signal_h.m4
@@ -0,0 +1,100 @@
+# signal_h.m4 serial 22
+dnl Copyright (C) 2007-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN_ONCE([gl_SIGNAL_H],
+[
+  AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
+  AC_REQUIRE([gl_CHECK_TYPE_SIGSET_T])
+  gl_NEXT_HEADERS([signal.h])
+
+# AIX declares sig_atomic_t to already include volatile, and C89 compilers
+# then choke on 'volatile sig_atomic_t'.  C99 requires that it compile.
+  AC_CHECK_TYPE([volatile sig_atomic_t], [],
+    [HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=0], [[
+#include <signal.h>
+    ]])
+
+  dnl Ensure the type pid_t gets defined.
+  AC_REQUIRE([AC_TYPE_PID_T])
+
+  AC_REQUIRE([AC_TYPE_UID_T])
+
+  dnl Persuade glibc <signal.h> to define sighandler_t.
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+  AC_CHECK_TYPE([sighandler_t], [], [HAVE_SIGHANDLER_T=0], [[
+#include <signal.h>
+    ]])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[#include <signal.h>
+    ]], [pthread_sigmask sigaction
+    sigaddset sigdelset sigemptyset sigfillset sigismember
+    sigpending sigprocmask])
+
+  AC_REQUIRE([AC_C_RESTRICT])
+])
+
+AC_DEFUN([gl_CHECK_TYPE_SIGSET_T],
+[
+  AC_CHECK_TYPES([sigset_t],
+    [gl_cv_type_sigset_t=yes], [gl_cv_type_sigset_t=no],
+    [[
+      #include <signal.h>
+      /* Mingw defines sigset_t not in <signal.h>, but in <sys/types.h>.  */
+      #include <sys/types.h>
+    ]])
+  if test $gl_cv_type_sigset_t != yes; then
+    HAVE_SIGSET_T=0
+  fi
+])
+
+# gl_SIGNAL_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_SIGNAL_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_SIGNAL_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_SIGNAL_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_SIGNAL_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PTHREAD_SIGMASK])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_RAISE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SIGNAL_H_SIGPIPE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SIGPROCMASK])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SIGACTION])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_SIGNAL_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_SIGNAL_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_POSIX_SIGNALBLOCKING=1; AC_SUBST([HAVE_POSIX_SIGNALBLOCKING])
+  HAVE_PTHREAD_SIGMASK=1;      AC_SUBST([HAVE_PTHREAD_SIGMASK])
+  HAVE_RAISE=1;                AC_SUBST([HAVE_RAISE])
+  HAVE_SIGSET_T=1;             AC_SUBST([HAVE_SIGSET_T])
+  HAVE_SIGINFO_T=1;            AC_SUBST([HAVE_SIGINFO_T])
+  HAVE_SIGACTION=1;            AC_SUBST([HAVE_SIGACTION])
+  HAVE_STRUCT_SIGACTION_SA_SIGACTION=1;
+                               AC_SUBST([HAVE_STRUCT_SIGACTION_SA_SIGACTION])
+  HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=1;
+                               AC_SUBST([HAVE_TYPE_VOLATILE_SIG_ATOMIC_T])
+  HAVE_SIGHANDLER_T=1;         AC_SUBST([HAVE_SIGHANDLER_T])
+  REPLACE_PTHREAD_SIGMASK=0;   AC_SUBST([REPLACE_PTHREAD_SIGMASK])
+  REPLACE_RAISE=0;             AC_SUBST([REPLACE_RAISE])
+])
diff --git a/src/grep/m4/signalblocking.m4 b/src/grep/m4/signalblocking.m4
new file mode 100644
index 0000000..bfd76b7
--- /dev/null
+++ b/src/grep/m4/signalblocking.m4
@@ -0,0 +1,23 @@
+# signalblocking.m4 serial 17
+dnl Copyright (C) 2001-2002, 2006-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# Determine available signal blocking primitives. Three different APIs exist:
+# 1) POSIX: sigemptyset, sigaddset, sigprocmask
+# 2) SYSV: sighold, sigrelse
+# 3) BSD: sigblock, sigsetmask
+# For simplicity, here we check only for the POSIX signal blocking.
+AC_DEFUN([gl_SIGNALBLOCKING],
+[
+  AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
+  AC_REQUIRE([gl_CHECK_TYPE_SIGSET_T])
+  HAVE_POSIX_SIGNALBLOCKING=0
+  if test "$gl_cv_type_sigset_t" = yes; then
+    AC_CHECK_FUNC([sigprocmask], [HAVE_POSIX_SIGNALBLOCKING=1])
+  fi
+])
+
+# Prerequisites of lib/sigprocmask.c.
+AC_DEFUN([gl_PREREQ_SIGPROCMASK], [:])
diff --git a/src/grep/m4/size_max.m4 b/src/grep/m4/size_max.m4
new file mode 100644
index 0000000..1d41ce9
--- /dev/null
+++ b/src/grep/m4/size_max.m4
@@ -0,0 +1,75 @@
+# size_max.m4 serial 12
+dnl Copyright (C) 2003, 2005-2006, 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+
+AC_PREREQ([2.61])
+
+AC_DEFUN([gl_SIZE_MAX],
+[
+  AC_CHECK_HEADERS([stdint.h])
+  dnl First test whether the system already has SIZE_MAX.
+  AC_CACHE_CHECK([for SIZE_MAX], [gl_cv_size_max], [
+    gl_cv_size_max=no
+    AC_EGREP_CPP([Found it], [
+#include <limits.h>
+#if HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#ifdef SIZE_MAX
+Found it
+#endif
+], [gl_cv_size_max=yes])
+    if test $gl_cv_size_max != yes; then
+      dnl Define it ourselves. Here we assume that the type 'size_t' is not wider
+      dnl than the type 'unsigned long'. Try hard to find a definition that can
+      dnl be used in a preprocessor #if, i.e. doesn't contain a cast.
+      AC_COMPUTE_INT([size_t_bits_minus_1], [sizeof (size_t) * CHAR_BIT - 1],
+        [#include <stddef.h>
+#include <limits.h>], [size_t_bits_minus_1=])
+      AC_COMPUTE_INT([fits_in_uint], [sizeof (size_t) <= sizeof (unsigned int)],
+        [#include <stddef.h>], [fits_in_uint=])
+      if test -n "$size_t_bits_minus_1" && test -n "$fits_in_uint"; then
+        if test $fits_in_uint = 1; then
+          dnl Even though SIZE_MAX fits in an unsigned int, it must be of type
+          dnl 'unsigned long' if the type 'size_t' is the same as 'unsigned long'.
+          AC_COMPILE_IFELSE(
+            [AC_LANG_PROGRAM(
+               [[#include <stddef.h>
+                 extern size_t foo;
+                 extern unsigned long foo;
+               ]],
+               [[]])],
+            [fits_in_uint=0])
+        fi
+        dnl We cannot use 'expr' to simplify this expression, because 'expr'
+        dnl works only with 'long' integers in the host environment, while we
+        dnl might be cross-compiling from a 32-bit platform to a 64-bit platform.
+        if test $fits_in_uint = 1; then
+          gl_cv_size_max="(((1U << $size_t_bits_minus_1) - 1) * 2 + 1)"
+        else
+          gl_cv_size_max="(((1UL << $size_t_bits_minus_1) - 1) * 2 + 1)"
+        fi
+      else
+        dnl Shouldn't happen, but who knows...
+        gl_cv_size_max='((size_t)~(size_t)0)'
+      fi
+    fi
+  ])
+  if test "$gl_cv_size_max" != yes; then
+    AC_DEFINE_UNQUOTED([SIZE_MAX], [$gl_cv_size_max],
+      [Define as the maximum value of type 'size_t', if the system doesn't define it.])
+  fi
+  dnl Don't redefine SIZE_MAX in config.h if config.h is re-included after
+  dnl <stdint.h>. Remember that the #undef in AH_VERBATIM gets replaced with
+  dnl #define by AC_DEFINE_UNQUOTED.
+  AH_VERBATIM([SIZE_MAX],
+[/* Define as the maximum value of type 'size_t', if the system doesn't define
+   it. */
+#ifndef SIZE_MAX
+# undef SIZE_MAX
+#endif])
+])
diff --git a/src/grep/m4/sleep.m4 b/src/grep/m4/sleep.m4
new file mode 100644
index 0000000..49a2dcb
--- /dev/null
+++ b/src/grep/m4/sleep.m4
@@ -0,0 +1,66 @@
+# sleep.m4 serial 11
+dnl Copyright (C) 2007-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_SLEEP],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  dnl We expect to see the declaration of sleep() in a header file.
+  dnl Older versions of mingw have a sleep() function that is an alias to
+  dnl _sleep() in MSVCRT. It has a different signature than POSIX sleep():
+  dnl it takes the number of milliseconds as argument and returns void.
+  dnl mingw does not declare this function.
+  AC_CHECK_DECLS([sleep], , , [[#include <unistd.h>]])
+  AC_CHECK_FUNCS_ONCE([sleep])
+  if test $ac_cv_have_decl_sleep != yes; then
+    HAVE_SLEEP=0
+  else
+    dnl Cygwin 1.5.x has a bug where sleep can't exceed 49.7 days.
+    AC_CACHE_CHECK([for working sleep], [gl_cv_func_sleep_works],
+      [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+#include <errno.h>
+#include <unistd.h>
+#include <signal.h>
+static void
+handle_alarm (int sig)
+{
+  if (sig != SIGALRM)
+    _exit (2);
+}
+]], [[
+    /* Failure to compile this test due to missing alarm is okay,
+       since all such platforms (mingw) also lack sleep.  */
+    unsigned int pentecost = 50 * 24 * 60 * 60; /* 50 days.  */
+    unsigned int remaining;
+    signal (SIGALRM, handle_alarm);
+    alarm (1);
+    remaining = sleep (pentecost);
+    if (remaining > pentecost)
+      return 3;
+    if (remaining <= pentecost - 10)
+      return 4;
+    return 0;
+    ]])],
+      [gl_cv_func_sleep_works=yes], [gl_cv_func_sleep_works=no],
+      [case "$host_os" in
+                        # Guess yes on glibc systems.
+         *-gnu* | gnu*) gl_cv_func_sleep_works="guessing yes" ;;
+                        # Guess yes on musl systems.
+         *-musl*)       gl_cv_func_sleep_works="guessing yes" ;;
+                        # Guess no on native Windows.
+         mingw*)        gl_cv_func_sleep_works="guessing no" ;;
+                        # If we don't know, obey --enable-cross-guesses.
+         *)             gl_cv_func_sleep_works="$gl_cross_guess_normal" ;;
+       esac
+      ])])
+    case "$gl_cv_func_sleep_works" in
+      *yes) ;;
+      *)
+        REPLACE_SLEEP=1
+        ;;
+    esac
+  fi
+])
diff --git a/src/grep/m4/snprintf.m4 b/src/grep/m4/snprintf.m4
new file mode 100644
index 0000000..8520994
--- /dev/null
+++ b/src/grep/m4/snprintf.m4
@@ -0,0 +1,62 @@
+# snprintf.m4 serial 7
+dnl Copyright (C) 2002-2004, 2007-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Libintl 0.17 will replace snprintf only if it does not support %1$s,
+dnl but defers to any gnulib snprintf replacements.  Therefore, gnulib
+dnl must guarantee that the decision for replacing snprintf is a superset
+dnl of the reasons checked by libintl.
+AC_DEFUN([gl_FUNC_SNPRINTF],
+[
+  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+  gl_cv_func_snprintf_usable=no
+  AC_CHECK_FUNCS([snprintf])
+  if test $ac_cv_func_snprintf = yes; then
+    gl_SNPRINTF_SIZE1
+    case "$gl_cv_func_snprintf_size1" in
+      *yes)
+        gl_SNPRINTF_RETVAL_C99
+        case "$gl_cv_func_snprintf_retval_c99" in
+          *yes)
+            gl_PRINTF_POSITIONS
+            case "$gl_cv_func_printf_positions" in
+              *yes)
+                gl_cv_func_snprintf_usable=yes
+                ;;
+            esac
+            ;;
+        esac
+        ;;
+    esac
+  fi
+  if test $gl_cv_func_snprintf_usable = no; then
+    gl_REPLACE_SNPRINTF
+  fi
+  AC_CHECK_DECLS_ONCE([snprintf])
+  if test $ac_cv_have_decl_snprintf = no; then
+    HAVE_DECL_SNPRINTF=0
+  fi
+])
+
+AC_DEFUN([gl_REPLACE_SNPRINTF],
+[
+  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+  AC_LIBOBJ([snprintf])
+  if test $ac_cv_func_snprintf = yes; then
+    REPLACE_SNPRINTF=1
+  else
+    AC_CHECK_DECLS_ONCE([snprintf])
+    if test $ac_cv_have_decl_snprintf = yes; then
+      dnl If the function is declared but does not appear to exist, it may be
+      dnl defined as an inline function. In order to avoid a conflict, we have
+      dnl to define rpl_snprintf, not snprintf.
+      REPLACE_SNPRINTF=1
+    fi
+  fi
+  gl_PREREQ_SNPRINTF
+])
+
+# Prerequisites of lib/snprintf.c.
+AC_DEFUN([gl_PREREQ_SNPRINTF], [:])
diff --git a/src/grep/m4/socketlib.m4 b/src/grep/m4/socketlib.m4
new file mode 100644
index 0000000..0f8a082
--- /dev/null
+++ b/src/grep/m4/socketlib.m4
@@ -0,0 +1,96 @@
+# socketlib.m4 serial 3
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl gl_SOCKETLIB
+dnl Determines the library to use for socket functions.
+dnl Sets and AC_SUBSTs LIBSOCKET.
+
+AC_DEFUN([gl_SOCKETLIB],
+[
+  gl_PREREQ_SYS_H_WINSOCK2 dnl for HAVE_WINSOCK2_H
+  LIBSOCKET=
+  if test $HAVE_WINSOCK2_H = 1; then
+    dnl Native Windows API (not Cygwin).
+    dnl If the function WSAStartup exists (declared in <winsock2.h> and
+    dnl defined through -lws2_32), we need to call it.
+    AC_CACHE_CHECK([for WSAStartup],
+      [gl_cv_func_wsastartup], [
+       gl_save_LIBS="$LIBS"
+       LIBS="$LIBS -lws2_32"
+       AC_LINK_IFELSE(
+         [AC_LANG_PROGRAM([[
+#ifdef HAVE_WINSOCK2_H
+# include <winsock2.h>
+#endif]], [[
+            WORD wVersionRequested = MAKEWORD(1, 1);
+            WSADATA wsaData;
+            int err = WSAStartup(wVersionRequested, &wsaData);
+            WSACleanup ();
+            ]])
+         ],
+         [gl_cv_func_wsastartup=yes],
+         [gl_cv_func_wsastartup=no])
+       LIBS="$gl_save_LIBS"
+      ])
+    if test "$gl_cv_func_wsastartup" = "yes"; then
+      AC_DEFINE([WINDOWS_SOCKETS], [1], [Define if WSAStartup is needed.])
+      LIBSOCKET='-lws2_32'
+    fi
+  else
+    dnl Unix API.
+    dnl Solaris has most socket functions in libsocket.
+    dnl Haiku has most socket functions in libnetwork.
+    dnl BeOS has most socket functions in libnet.
+    dnl On HP-UX, do NOT link with libxnet, because in 64-bit mode this would
+    dnl break code (e.g. in libraries) that invokes accept(), getpeername(),
+    dnl getsockname(), getsockopt(), or recvfrom() with a 32-bit addrlen. See
+    dnl "man xopen_networking" for details.
+    AC_CACHE_CHECK([for library containing setsockopt], [gl_cv_lib_socket], [
+      gl_cv_lib_socket=
+      AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern
+#ifdef __cplusplus
+"C"
+#endif
+char setsockopt();]], [[setsockopt();]])],
+        [],
+        [gl_save_LIBS="$LIBS"
+         LIBS="$gl_save_LIBS -lsocket"
+         AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern
+#ifdef __cplusplus
+"C"
+#endif
+char setsockopt();]], [[setsockopt();]])],
+           [gl_cv_lib_socket="-lsocket"])
+         if test -z "$gl_cv_lib_socket"; then
+           LIBS="$gl_save_LIBS -lnetwork"
+           AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern
+#ifdef __cplusplus
+"C"
+#endif
+char setsockopt();]], [[setsockopt();]])],
+             [gl_cv_lib_socket="-lnetwork"])
+           if test -z "$gl_cv_lib_socket"; then
+             LIBS="$gl_save_LIBS -lnet"
+             AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern
+#ifdef __cplusplus
+"C"
+#endif
+char setsockopt();]], [[setsockopt();]])],
+               [gl_cv_lib_socket="-lnet"])
+           fi
+         fi
+         LIBS="$gl_save_LIBS"
+        ])
+      if test -z "$gl_cv_lib_socket"; then
+        gl_cv_lib_socket="none needed"
+      fi
+    ])
+    if test "$gl_cv_lib_socket" != "none needed"; then
+      LIBSOCKET="$gl_cv_lib_socket"
+    fi
+  fi
+  AC_SUBST([LIBSOCKET])
+])
diff --git a/src/grep/m4/sockets.m4 b/src/grep/m4/sockets.m4
new file mode 100644
index 0000000..02b43b6
--- /dev/null
+++ b/src/grep/m4/sockets.m4
@@ -0,0 +1,17 @@
+# sockets.m4 serial 7
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_SOCKETS],
+[
+  AC_REQUIRE([AC_C_INLINE])
+  AC_REQUIRE([gl_SOCKETLIB])
+  gl_PREREQ_SOCKETS
+])
+
+# Prerequisites of lib/sockets.c.
+AC_DEFUN([gl_PREREQ_SOCKETS], [
+  :
+])
diff --git a/src/grep/m4/socklen.m4 b/src/grep/m4/socklen.m4
new file mode 100644
index 0000000..eca1d1b
--- /dev/null
+++ b/src/grep/m4/socklen.m4
@@ -0,0 +1,76 @@
+# socklen.m4 serial 11
+dnl Copyright (C) 2005-2007, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Albert Chin, Windows fixes from Simon Josefsson.
+
+dnl Check for socklen_t: historically on BSD it is an int, and in
+dnl POSIX 1g it is a type of its own, but some platforms use different
+dnl types for the argument to getsockopt, getpeername, etc.:
+dnl HP-UX 10.20, IRIX 6.5, OSF/1 4.0, Interix 3.5, BeOS.
+dnl So we have to test to find something that will work.
+
+AC_DEFUN([gl_TYPE_SOCKLEN_T],
+  [AC_REQUIRE([gl_CHECK_SOCKET_HEADERS])dnl
+   AC_CHECK_TYPE([socklen_t], ,
+     [AC_CACHE_CHECK([for socklen_t equivalent],
+        [gl_cv_socklen_t_equiv],
+        [# Systems have either "struct sockaddr *" or
+         # "void *" as the second argument to getpeername
+         gl_cv_socklen_t_equiv=
+         for arg2 in "struct sockaddr" void; do
+           for t in int size_t "unsigned int" "long int" "unsigned long int"; do
+             AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
+                 [[#include <sys/types.h>
+                   #include <sys/socket.h>
+
+                   int getpeername (int, $arg2 *, $t *);]],
+                 [[$t len;
+                  getpeername (0, 0, &len);]])],
+               [gl_cv_socklen_t_equiv="$t"])
+             test "$gl_cv_socklen_t_equiv" != "" && break
+           done
+           test "$gl_cv_socklen_t_equiv" != "" && break
+         done
+         if test "$gl_cv_socklen_t_equiv" = ""; then
+           AC_MSG_ERROR([Cannot find a type to use in place of socklen_t])
+         fi
+        ])
+      AC_DEFINE_UNQUOTED([socklen_t], [$gl_cv_socklen_t_equiv],
+        [type to use in place of socklen_t if not defined])],
+     [gl_SOCKET_HEADERS])])
+
+dnl On mingw32, socklen_t is in ws2tcpip.h ('int'), so we try to find
+dnl it there too.  But on Cygwin, wc2tcpip.h must not be included.  Users
+dnl of this module should use the same include pattern as gl_SOCKET_HEADERS.
+dnl When you change this macro, keep also in sync:
+dnl   - gl_CHECK_SOCKET_HEADERS,
+dnl   - the Include section of modules/socklen.
+AC_DEFUN([gl_SOCKET_HEADERS],
+[
+/* <sys/types.h> is not needed according to POSIX, but the
+   <sys/socket.h> in i386-unknown-freebsd4.10 and
+   powerpc-apple-darwin5.5 required it. */
+#include <sys/types.h>
+#if HAVE_SYS_SOCKET_H
+# include <sys/socket.h>
+#elif HAVE_WS2TCPIP_H
+# include <ws2tcpip.h>
+#endif
+])
+
+dnl Tests for the existence of the header for socket facilities.
+dnl Defines the C macros HAVE_SYS_SOCKET_H, HAVE_WS2TCPIP_H.
+dnl This macro must match gl_SOCKET_HEADERS.
+AC_DEFUN([gl_CHECK_SOCKET_HEADERS],
+  [AC_CHECK_HEADERS_ONCE([sys/socket.h])
+   if test $ac_cv_header_sys_socket_h = no; then
+     dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
+     dnl the check for those headers unconditional; yet cygwin reports
+     dnl that the headers are present but cannot be compiled (since on
+     dnl cygwin, all socket information should come from sys/socket.h).
+     AC_CHECK_HEADERS([ws2tcpip.h])
+   fi
+  ])
diff --git a/src/grep/m4/sockpfaf.m4 b/src/grep/m4/sockpfaf.m4
new file mode 100644
index 0000000..17e14c7
--- /dev/null
+++ b/src/grep/m4/sockpfaf.m4
@@ -0,0 +1,84 @@
+# sockpfaf.m4 serial 10
+dnl Copyright (C) 2004, 2006, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Test for some common socket protocol families (PF_INET, PF_INET6, ...)
+dnl and some common address families (AF_INET, AF_INET6, ...).
+dnl This test assumes that a system supports an address family if and only if
+dnl it supports the corresponding protocol family.
+
+dnl From Bruno Haible.
+
+AC_DEFUN([gl_SOCKET_FAMILIES],
+[
+  AC_REQUIRE([gl_SYS_SOCKET_H])
+  AC_CHECK_HEADERS_ONCE([netinet/in.h])
+
+  AC_CACHE_CHECK([for IPv4 sockets],
+    [gl_cv_socket_ipv4],
+    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h>
+#endif]],
+[[int x = AF_INET; struct in_addr y; struct sockaddr_in z;
+ if (&x && &y && &z) return 0;]])],
+       gl_cv_socket_ipv4=yes, gl_cv_socket_ipv4=no)])
+  if test $gl_cv_socket_ipv4 = yes; then
+    AC_DEFINE([HAVE_IPV4], [1], [Define to 1 if <sys/socket.h> defines AF_INET.])
+  fi
+
+  AC_CACHE_CHECK([for IPv6 sockets],
+    [gl_cv_socket_ipv6],
+    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h>
+#endif
+#ifdef HAVE_WS2TCPIP_H
+#include <ws2tcpip.h>
+#endif]],
+[[int x = AF_INET6; struct in6_addr y; struct sockaddr_in6 z;
+ if (&x && &y && &z) return 0;]])],
+       gl_cv_socket_ipv6=yes, gl_cv_socket_ipv6=no)])
+  if test $gl_cv_socket_ipv6 = yes; then
+    AC_DEFINE([HAVE_IPV6], [1], [Define to 1 if <sys/socket.h> defines AF_INET6.])
+  fi
+])
+
+AC_DEFUN([gl_SOCKET_FAMILY_UNIX],
+[
+  AC_REQUIRE([gl_SYS_SOCKET_H])
+  AC_CHECK_HEADERS_ONCE([sys/un.h])
+
+  AC_CACHE_CHECK([for UNIX domain sockets],
+    [gl_cv_socket_unix],
+    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_SYS_UN_H
+#include <sys/un.h>
+#endif
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h>
+#endif]],
+[[int x = AF_UNIX; struct sockaddr_un y;
+ if (&x && &y) return 0;]])],
+       gl_cv_socket_unix=yes, gl_cv_socket_unix=no)])
+  if test $gl_cv_socket_unix = yes; then
+    AC_DEFINE([HAVE_UNIXSOCKET], [1], [Define to 1 if <sys/socket.h> defines AF_UNIX.])
+  fi
+])
diff --git a/src/grep/m4/ssize_t.m4 b/src/grep/m4/ssize_t.m4
new file mode 100644
index 0000000..f0ed509
--- /dev/null
+++ b/src/grep/m4/ssize_t.m4
@@ -0,0 +1,23 @@
+# ssize_t.m4 serial 5 (gettext-0.18.2)
+dnl Copyright (C) 2001-2003, 2006, 2010-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+dnl Test whether ssize_t is defined.
+
+AC_DEFUN([gt_TYPE_SSIZE_T],
+[
+  AC_CACHE_CHECK([for ssize_t], [gt_cv_ssize_t],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <sys/types.h>]],
+          [[int x = sizeof (ssize_t *) + sizeof (ssize_t);
+            return !x;]])],
+       [gt_cv_ssize_t=yes], [gt_cv_ssize_t=no])])
+  if test $gt_cv_ssize_t = no; then
+    AC_DEFINE([ssize_t], [int],
+              [Define as a signed type of the same size as size_t.])
+  fi
+])
diff --git a/src/grep/m4/stack-direction.m4 b/src/grep/m4/stack-direction.m4
new file mode 100644
index 0000000..9328725
--- /dev/null
+++ b/src/grep/m4/stack-direction.m4
@@ -0,0 +1,105 @@
+# stack-direction.m4 serial 7
+dnl Copyright (C) 2002-2021 Free Software Foundation, Inc.
+dnl This file is free software, distributed under the terms of the GNU
+dnl General Public License.  As a special exception to the GNU General
+dnl Public License, this file may be distributed as part of a program
+dnl that contains a configuration script generated by Autoconf, under
+dnl the same distribution terms as the rest of that program.
+
+dnl Written by Bruno Haible.
+
+# Determine the stack direction. Define the C macro STACK_DIRECTION.
+AC_DEFUN([SV_STACK_DIRECTION],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CACHE_CHECK([for stack direction], [sv_cv_stack_direction_msg], [
+    case "$host_cpu" in
+      dnl See the #define STACK_GROWS_DOWNWARD in gcc-3.1/gcc/config/*/*.h.
+      a29k | \
+      aarch64* | \
+      alpha* | \
+      arc | \
+      arm* | strongarm* | xscale* | \
+      avr | avr32 | \
+      bfin | \
+      c1 | c2 | c32 | c34 | c38 | \
+      clipper | \
+      cris | \
+      d30v | \
+      elxsi | \
+      fr30 | \
+      h8300 | \
+      i?86 | x86_64 | \
+      i860 | \
+      ia64 | \
+      m32r | \
+      m68* | \
+      m88k | \
+      mcore | \
+      microblaze | \
+      mips* | \
+      mmix | \
+      mn10200 | \
+      mn10300 | \
+      nios2 | \
+      nds32* | \
+      ns32k | \
+      pdp11 | \
+      pj* | \
+      powerpc* | rs6000 | \
+      riscv* | \
+      romp | \
+      s390* | \
+      sh* | \
+      sparc* | \
+      v850 | \
+      vax | \
+      xtensa)
+        sv_cv_stack_direction=-1 ;;
+      c4x | \
+      dsp16xx | \
+      i960 | \
+      hppa* | parisc* | \
+      stormy16 | \
+      we32k)
+        sv_cv_stack_direction=1 ;;
+      *)
+        if test $cross_compiling = no; then
+          cat > conftest.c <<EOF
+#include <stdio.h>
+int
+find_stack_direction (int *addr, int depth)
+{
+  int dir, dummy = 0;
+  if (! addr)
+    addr = &dummy;
+  *addr = addr < &dummy ? 1 : addr == &dummy ? 0 : -1;
+  dir = depth ? find_stack_direction (addr, depth - 1) : 0;
+  return dir + dummy;
+}
+int
+main (int argc, char *argv[])
+{
+  printf ("%d\n", find_stack_direction (NULL, argc + 20));
+  return 0;
+}
+EOF
+          AC_TRY_EVAL([ac_link])
+          sv_cv_stack_direction=`./conftest`
+        else
+          sv_cv_stack_direction=0
+        fi
+        ;;
+    esac
+    case $sv_cv_stack_direction in
+      1)  sv_cv_stack_direction_msg="grows up";;
+      -1) sv_cv_stack_direction_msg="grows down";;
+      *)  sv_cv_stack_direction_msg="unknown";;
+    esac
+  ])
+  AC_DEFINE_UNQUOTED([STACK_DIRECTION], [$sv_cv_stack_direction],
+    [Define as the direction of stack growth for your system.
+     STACK_DIRECTION > 0 => grows toward higher addresses
+     STACK_DIRECTION < 0 => grows toward lower addresses
+     STACK_DIRECTION = 0 => spaghetti stack.])
+])
diff --git a/src/grep/m4/stat-time.m4 b/src/grep/m4/stat-time.m4
new file mode 100644
index 0000000..df1c2a7
--- /dev/null
+++ b/src/grep/m4/stat-time.m4
@@ -0,0 +1,83 @@
+# Checks for stat-related time functions.
+
+# Copyright (C) 1998-1999, 2001, 2003, 2005-2007, 2009-2021 Free Software
+# Foundation, Inc.
+
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+dnl From Paul Eggert.
+
+# st_atim.tv_nsec - Linux, Solaris, Cygwin
+# st_atimespec.tv_nsec - FreeBSD, NetBSD, if ! defined _POSIX_SOURCE
+# st_atimensec - FreeBSD, NetBSD, if defined _POSIX_SOURCE
+# st_atim.st__tim.tv_nsec - UnixWare (at least 2.1.2 through 7.1)
+
+# st_birthtimespec - FreeBSD, NetBSD (hidden on OpenBSD 3.9, anyway)
+# st_birthtim - Cygwin 1.7.0+
+
+AC_DEFUN([gl_STAT_TIME],
+[
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+  AC_CHECK_HEADERS_ONCE([sys/time.h])
+
+  AC_CHECK_MEMBERS([struct stat.st_atim.tv_nsec],
+    [AC_CACHE_CHECK([whether struct stat.st_atim is of type struct timespec],
+       [ac_cv_typeof_struct_stat_st_atim_is_struct_timespec],
+       [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
+          [[
+            #include <sys/types.h>
+            #include <sys/stat.h>
+            #if HAVE_SYS_TIME_H
+            # include <sys/time.h>
+            #endif
+            #include <time.h>
+            struct timespec ts;
+            struct stat st;
+          ]],
+          [[
+            st.st_atim = ts;
+          ]])],
+          [ac_cv_typeof_struct_stat_st_atim_is_struct_timespec=yes],
+          [ac_cv_typeof_struct_stat_st_atim_is_struct_timespec=no])])
+     if test $ac_cv_typeof_struct_stat_st_atim_is_struct_timespec = yes; then
+       AC_DEFINE([TYPEOF_STRUCT_STAT_ST_ATIM_IS_STRUCT_TIMESPEC], [1],
+         [Define to 1 if the type of the st_atim member of a struct stat is
+          struct timespec.])
+     fi],
+    [AC_CHECK_MEMBERS([struct stat.st_atimespec.tv_nsec], [],
+       [AC_CHECK_MEMBERS([struct stat.st_atimensec], [],
+          [AC_CHECK_MEMBERS([struct stat.st_atim.st__tim.tv_nsec], [], [],
+             [#include <sys/types.h>
+              #include <sys/stat.h>])],
+          [#include <sys/types.h>
+           #include <sys/stat.h>])],
+       [#include <sys/types.h>
+        #include <sys/stat.h>])],
+    [#include <sys/types.h>
+     #include <sys/stat.h>])
+])
+
+# Check for st_birthtime, a feature from UFS2 (FreeBSD, NetBSD, OpenBSD, etc.)
+# and NTFS (Cygwin).
+# There was a time when this field was named st_createtime (21 June
+# 2002 to 16 July 2002) But that window is very small and applied only
+# to development code, so systems still using that configuration are
+# not supported.  See revisions 1.10 and 1.11 of FreeBSD's
+# src/sys/ufs/ufs/dinode.h.
+#
+AC_DEFUN([gl_STAT_BIRTHTIME],
+[
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+  AC_CHECK_HEADERS_ONCE([sys/time.h])
+  AC_CHECK_MEMBERS([struct stat.st_birthtimespec.tv_nsec], [],
+    [AC_CHECK_MEMBERS([struct stat.st_birthtimensec], [],
+      [AC_CHECK_MEMBERS([struct stat.st_birthtim.tv_nsec], [], [],
+         [#include <sys/types.h>
+          #include <sys/stat.h>])],
+       [#include <sys/types.h>
+        #include <sys/stat.h>])],
+    [#include <sys/types.h>
+     #include <sys/stat.h>])
+])
diff --git a/src/grep/m4/stat.m4 b/src/grep/m4/stat.m4
new file mode 100644
index 0000000..9bcdb72
--- /dev/null
+++ b/src/grep/m4/stat.m4
@@ -0,0 +1,85 @@
+# serial 18
+
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_STAT],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
+  AC_CHECK_FUNCS_ONCE([lstat])
+  case "$host_os" in
+    mingw*)
+      dnl On this platform, the original stat() returns st_atime, st_mtime,
+      dnl st_ctime values that are affected by the time zone.
+      REPLACE_STAT=1
+      ;;
+    *)
+      dnl AIX 7.1, Solaris 9, mingw64 mistakenly succeed on stat("file/").
+      dnl (For mingw, this is due to a broken stat() override in libmingwex.a.)
+      dnl FreeBSD 7.2 mistakenly succeeds on stat("link-to-file/").
+      AC_CACHE_CHECK([whether stat handles trailing slashes on files],
+        [gl_cv_func_stat_file_slash],
+        [touch conftest.tmp
+         # Assume that if we have lstat, we can also check symlinks.
+         if test $ac_cv_func_lstat = yes; then
+           ln -s conftest.tmp conftest.lnk
+         fi
+         AC_RUN_IFELSE(
+           [AC_LANG_PROGRAM(
+             [[#include <sys/stat.h>
+]], [[int result = 0;
+               struct stat st;
+               if (!stat ("conftest.tmp/", &st))
+                 result |= 1;
+#if HAVE_LSTAT
+               if (!stat ("conftest.lnk/", &st))
+                 result |= 2;
+#endif
+               return result;
+             ]])],
+           [gl_cv_func_stat_file_slash=yes], [gl_cv_func_stat_file_slash=no],
+           [case "$host_os" in
+                               # Guess yes on Linux systems.
+              linux-* | linux) gl_cv_func_stat_file_slash="guessing yes" ;;
+                               # Guess yes on glibc systems.
+              *-gnu* | gnu*)   gl_cv_func_stat_file_slash="guessing yes" ;;
+                               # If we don't know, obey --enable-cross-guesses.
+              *)               gl_cv_func_stat_file_slash="$gl_cross_guess_normal" ;;
+            esac
+           ])
+         rm -f conftest.tmp conftest.lnk])
+      case $gl_cv_func_stat_file_slash in
+        *no)
+          REPLACE_STAT=1
+          AC_DEFINE([REPLACE_FUNC_STAT_FILE], [1], [Define to 1 if stat needs
+            help when passed a file name with a trailing slash]);;
+      esac
+      case $host_os in
+        dnl Solaris stat can return a negative tv_nsec.
+        solaris*)
+          REPLACE_FSTAT=1 ;;
+      esac
+      ;;
+  esac
+])
+
+# Prerequisites of lib/stat.c and lib/stat-w32.c.
+AC_DEFUN([gl_PREREQ_STAT], [
+  AC_REQUIRE([gl_SYS_STAT_H])
+  AC_REQUIRE([gl_PREREQ_STAT_W32])
+  :
+])
+
+# Prerequisites of lib/stat-w32.c.
+AC_DEFUN([gl_PREREQ_STAT_W32], [
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  case "$host_os" in
+    mingw*)
+      AC_CHECK_HEADERS([sdkddkver.h])
+      ;;
+  esac
+])
diff --git a/src/grep/m4/stdalign.m4 b/src/grep/m4/stdalign.m4
new file mode 100644
index 0000000..e22d7f7
--- /dev/null
+++ b/src/grep/m4/stdalign.m4
@@ -0,0 +1,59 @@
+# Check for stdalign.h that conforms to C11.
+
+dnl Copyright 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# Prepare for substituting <stdalign.h> if it is not supported.
+
+AC_DEFUN([gl_STDALIGN_H],
+[
+  AC_CACHE_CHECK([for working stdalign.h],
+    [gl_cv_header_working_stdalign_h],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <stdint.h>
+            #include <stdalign.h>
+            #include <stddef.h>
+
+            /* Test that alignof yields a result consistent with offsetof.
+               This catches GCC bug 52023
+               <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52023>.  */
+            #ifdef __cplusplus
+               template <class t> struct alignof_helper { char a; t b; };
+            # define ao(type) offsetof (alignof_helper<type>, b)
+            #else
+            # define ao(type) offsetof (struct { char a; type b; }, b)
+            #endif
+            char test_double[ao (double) % _Alignof (double) == 0 ? 1 : -1];
+            char test_long[ao (long int) % _Alignof (long int) == 0 ? 1 : -1];
+            char test_alignof[alignof (double) == _Alignof (double) ? 1 : -1];
+
+            /* Test _Alignas only on platforms where gnulib can help.  */
+            #if \
+                ((defined __cplusplus && 201103 <= __cplusplus) \
+                 || (__TINYC__ && defined __attribute__) \
+                 || (defined __APPLE__ && defined __MACH__ \
+                     ? 4 < __GNUC__ + (1 <= __GNUC_MINOR__) \
+                     : __GNUC__) \
+                 || (__ia64 && (61200 <= __HP_cc || 61200 <= __HP_aCC)) \
+                 || __ICC || 0x590 <= __SUNPRO_C || 0x0600 <= __xlC__ \
+                 || 1300 <= _MSC_VER)
+              struct alignas_test { char c; char alignas (8) alignas_8; };
+              char test_alignas[offsetof (struct alignas_test, alignas_8) == 8
+                                ? 1 : -1];
+            #endif
+          ]])],
+       [gl_cv_header_working_stdalign_h=yes],
+       [gl_cv_header_working_stdalign_h=no])])
+
+  if test $gl_cv_header_working_stdalign_h = yes; then
+    STDALIGN_H=''
+  else
+    STDALIGN_H='stdalign.h'
+  fi
+
+  AC_SUBST([STDALIGN_H])
+  AM_CONDITIONAL([GL_GENERATE_STDALIGN_H], [test -n "$STDALIGN_H"])
+])
diff --git a/src/grep/m4/stdarg.m4 b/src/grep/m4/stdarg.m4
new file mode 100644
index 0000000..0b5fb63
--- /dev/null
+++ b/src/grep/m4/stdarg.m4
@@ -0,0 +1,78 @@
+# stdarg.m4 serial 7
+dnl Copyright (C) 2006, 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+dnl Provide a working va_copy in combination with <stdarg.h>.
+
+AC_DEFUN([gl_STDARG_H],
+[
+  STDARG_H=''
+  NEXT_STDARG_H='<stdarg.h>'
+  AC_CACHE_CHECK([for va_copy],
+    [gl_cv_func_va_copy],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <stdarg.h>]],
+          [[
+#ifndef va_copy
+void (*func) (va_list, va_list) = va_copy;
+#endif
+          ]])],
+       [gl_cv_func_va_copy=yes],
+       [gl_cv_func_va_copy=no])
+    ])
+  if test $gl_cv_func_va_copy = no; then
+    dnl Provide a substitute.
+    dnl Usually a simple definition in <config.h> is enough. Not so on AIX 5
+    dnl with some versions of the /usr/vac/bin/cc compiler. It has an <stdarg.h>
+    dnl which does '#undef va_copy', leading to a missing va_copy symbol. For
+    dnl this platform, we use an <stdarg.h> substitute. But we cannot use this
+    dnl approach on other platforms, because <stdarg.h> often defines only
+    dnl preprocessor macros and gl_ABSOLUTE_HEADER, gl_CHECK_NEXT_HEADERS do
+    dnl not work in this situation.
+    AC_EGREP_CPP([vaccine],
+      [#if defined _AIX && !defined __GNUC__
+        AIX vaccine
+       #endif
+      ], [gl_aixcc=yes], [gl_aixcc=no])
+    if test $gl_aixcc = yes; then
+      dnl Provide a substitute <stdarg.h> file.
+      STDARG_H=stdarg.h
+      gl_NEXT_HEADERS([stdarg.h])
+      dnl Fallback for the case when <stdarg.h> contains only macro definitions.
+      if test "$gl_cv_next_stdarg_h" = '""'; then
+        gl_cv_next_stdarg_h='"///usr/include/stdarg.h"'
+        NEXT_STDARG_H="$gl_cv_next_stdarg_h"
+      fi
+    else
+      dnl Provide a substitute in <config.h>, either __va_copy or as a simple
+      dnl assignment.
+      gl_CACHE_VAL_SILENT([gl_cv_func___va_copy], [
+        AC_COMPILE_IFELSE(
+          [AC_LANG_PROGRAM(
+             [[#include <stdarg.h>]],
+             [[
+#ifndef __va_copy
+error, bail out
+#endif
+             ]])],
+          [gl_cv_func___va_copy=yes],
+          [gl_cv_func___va_copy=no])])
+      if test $gl_cv_func___va_copy = yes; then
+        AC_DEFINE([va_copy], [__va_copy],
+          [Define as a macro for copying va_list variables.])
+      else
+        AH_VERBATIM([gl_VA_COPY], [/* A replacement for va_copy, if needed.  */
+#define gl_va_copy(a,b) ((a) = (b))])
+        AC_DEFINE([va_copy], [gl_va_copy],
+          [Define as a macro for copying va_list variables.])
+      fi
+    fi
+  fi
+  AC_SUBST([STDARG_H])
+  AM_CONDITIONAL([GL_GENERATE_STDARG_H], [test -n "$STDARG_H"])
+  AC_SUBST([NEXT_STDARG_H])
+])
diff --git a/src/grep/m4/stdbool.m4 b/src/grep/m4/stdbool.m4
new file mode 100644
index 0000000..3169779
--- /dev/null
+++ b/src/grep/m4/stdbool.m4
@@ -0,0 +1,122 @@
+# Check for stdbool.h that conforms to C99.
+
+dnl Copyright (C) 2002-2006, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+#serial 8
+
+# Prepare for substituting <stdbool.h> if it is not supported.
+
+AC_DEFUN([AM_STDBOOL_H],
+[
+  AC_REQUIRE([AC_CHECK_HEADER_STDBOOL])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+
+  dnl On some platforms, <stdbool.h> does not exist or does not conform to C99.
+  dnl On Solaris 10 with CC=cc CXX=CC, <stdbool.h> exists but is not usable
+  dnl in C++ mode (and no <cstdbool> exists). In this case, we use our
+  dnl replacement, also in C mode (for binary compatibility between C and C++).
+  if test "$ac_cv_header_stdbool_h" = yes; then
+    case "$host_os" in
+      solaris*)
+        if test -z "$GCC"; then
+          STDBOOL_H='stdbool.h'
+        else
+          STDBOOL_H=''
+        fi
+        ;;
+      *)
+        STDBOOL_H=''
+        ;;
+    esac
+  else
+    STDBOOL_H='stdbool.h'
+  fi
+  AC_SUBST([STDBOOL_H])
+  AM_CONDITIONAL([GL_GENERATE_STDBOOL_H], [test -n "$STDBOOL_H"])
+
+  if test "$ac_cv_type__Bool" = yes; then
+    HAVE__BOOL=1
+  else
+    HAVE__BOOL=0
+  fi
+  AC_SUBST([HAVE__BOOL])
+])
+
+# AM_STDBOOL_H will be renamed to gl_STDBOOL_H in the future.
+AC_DEFUN([gl_STDBOOL_H], [AM_STDBOOL_H])
+
+# This version of the macro is needed in autoconf <= 2.68.
+
+AC_DEFUN([AC_CHECK_HEADER_STDBOOL],
+  [AC_CACHE_CHECK([for stdbool.h that conforms to C99],
+     [ac_cv_header_stdbool_h],
+     [AC_COMPILE_IFELSE(
+        [AC_LANG_PROGRAM(
+           [[
+             #include <stdbool.h>
+
+             #ifdef __cplusplus
+              typedef bool Bool;
+             #else
+              typedef _Bool Bool;
+              #ifndef bool
+               "error: bool is not defined"
+              #endif
+              #ifndef false
+               "error: false is not defined"
+              #endif
+              #if false
+               "error: false is not 0"
+              #endif
+              #ifndef true
+               "error: true is not defined"
+              #endif
+              #if true != 1
+               "error: true is not 1"
+              #endif
+             #endif
+
+             #ifndef __bool_true_false_are_defined
+              "error: __bool_true_false_are_defined is not defined"
+             #endif
+
+             struct s { Bool s: 1; Bool t; bool u: 1; bool v; } s;
+
+             char a[true == 1 ? 1 : -1];
+             char b[false == 0 ? 1 : -1];
+             char c[__bool_true_false_are_defined == 1 ? 1 : -1];
+             char d[(bool) 0.5 == true ? 1 : -1];
+             /* See body of main program for 'e'.  */
+             char f[(Bool) 0.0 == false ? 1 : -1];
+             char g[true];
+             char h[sizeof (Bool)];
+             char i[sizeof s.t];
+             enum { j = false, k = true, l = false * true, m = true * 256 };
+             /* The following fails for
+                HP aC++/ANSI C B3910B A.05.55 [Dec 04 2003]. */
+             Bool n[m];
+             char o[sizeof n == m * sizeof n[0] ? 1 : -1];
+             char p[-1 - (Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1];
+             /* Catch a bug in an HP-UX C compiler.  See
+                https://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
+                https://lists.gnu.org/r/bug-coreutils/2005-11/msg00161.html
+              */
+             Bool q = true;
+             Bool *pq = &q;
+             bool *qq = &q;
+           ]],
+           [[
+             bool e = &s;
+             *pq |= q; *pq |= ! q;
+             *qq |= q; *qq |= ! q;
+             /* Refer to every declared value, to avoid compiler optimizations.  */
+             return (!a + !b + !c + !d + !e + !f + !g + !h + !i + !!j + !k + !!l
+                     + !m + !n + !o + !p + !q + !pq + !qq);
+           ]])],
+        [ac_cv_header_stdbool_h=yes],
+        [ac_cv_header_stdbool_h=no])])
+   AC_CHECK_TYPES([_Bool])
+])
diff --git a/src/grep/m4/stddef_h.m4 b/src/grep/m4/stddef_h.m4
new file mode 100644
index 0000000..1303d2e
--- /dev/null
+++ b/src/grep/m4/stddef_h.m4
@@ -0,0 +1,99 @@
+# stddef_h.m4 serial 11
+dnl Copyright (C) 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl A placeholder for <stddef.h>, for platforms that have issues.
+
+AC_DEFUN_ONCE([gl_STDDEF_H],
+[
+  AC_REQUIRE([gl_STDDEF_H_DEFAULTS])
+  AC_REQUIRE([gt_TYPE_WCHAR_T])
+
+  dnl Persuade OpenBSD <stddef.h> to declare max_align_t.
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+  STDDEF_H=
+
+  dnl Test whether the type max_align_t exists and whether its alignment
+  dnl "is as great as is supported by the implementation in all contexts".
+  AC_CACHE_CHECK([for good max_align_t],
+    [gl_cv_type_max_align_t],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <stddef.h>
+            unsigned int s = sizeof (max_align_t);
+            #if defined __GNUC__ || defined __clang__ || defined __IBM__ALIGNOF__
+            int check1[2 * (__alignof__ (double) <= __alignof__ (max_align_t)) - 1];
+            int check2[2 * (__alignof__ (long double) <= __alignof__ (max_align_t)) - 1];
+            #endif
+            typedef struct { char a; max_align_t b; } max_helper;
+            typedef struct { char a; long b; } long_helper;
+            typedef struct { char a; double b; } double_helper;
+            typedef struct { char a; long double b; } long_double_helper;
+            int check3[2 * (offsetof (long_helper, b) <= offsetof (max_helper, b)) - 1];
+            int check4[2 * (offsetof (double_helper, b) <= offsetof (max_helper, b)) - 1];
+            int check5[2 * (offsetof (long_double_helper, b) <= offsetof (max_helper, b)) - 1];
+          ]])],
+       [gl_cv_type_max_align_t=yes],
+       [gl_cv_type_max_align_t=no])
+    ])
+  if test $gl_cv_type_max_align_t = no; then
+    HAVE_MAX_ALIGN_T=0
+    STDDEF_H=stddef.h
+  fi
+
+  if test $gt_cv_c_wchar_t = no; then
+    HAVE_WCHAR_T=0
+    STDDEF_H=stddef.h
+  fi
+
+  AC_CACHE_CHECK([whether NULL can be used in arbitrary expressions],
+    [gl_cv_decl_null_works],
+    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stddef.h>
+      int test[2 * (sizeof NULL == sizeof (void *)) -1];
+]])],
+      [gl_cv_decl_null_works=yes],
+      [gl_cv_decl_null_works=no])])
+  if test $gl_cv_decl_null_works = no; then
+    REPLACE_NULL=1
+    STDDEF_H=stddef.h
+  fi
+
+  AC_SUBST([STDDEF_H])
+  AM_CONDITIONAL([GL_GENERATE_STDDEF_H], [test -n "$STDDEF_H"])
+  if test -n "$STDDEF_H"; then
+    gl_NEXT_HEADERS([stddef.h])
+  fi
+])
+
+# gl_STDDEF_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_STDDEF_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_STDDEF_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_STDDEF_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_STDDEF_H_MODULE_INDICATOR_DEFAULTS], [
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_STDDEF_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_STDDEF_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_STDDEF_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  REPLACE_NULL=0;                AC_SUBST([REPLACE_NULL])
+  HAVE_MAX_ALIGN_T=1;            AC_SUBST([HAVE_MAX_ALIGN_T])
+  HAVE_WCHAR_T=1;                AC_SUBST([HAVE_WCHAR_T])
+])
diff --git a/src/grep/m4/stdint.m4 b/src/grep/m4/stdint.m4
new file mode 100644
index 0000000..2eb1652
--- /dev/null
+++ b/src/grep/m4/stdint.m4
@@ -0,0 +1,533 @@
+# stdint.m4 serial 60
+dnl Copyright (C) 2001-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Paul Eggert and Bruno Haible.
+dnl Test whether <stdint.h> is supported or must be substituted.
+
+AC_PREREQ([2.61])
+
+AC_DEFUN_ONCE([gl_STDINT_H],
+[
+  AC_PREREQ([2.59])dnl
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+  AC_REQUIRE([gl_LIMITS_H])
+  AC_REQUIRE([gt_TYPE_WINT_T])
+
+  dnl For backward compatibility. Some packages may still be testing these
+  dnl macros.
+  AC_DEFINE([HAVE_LONG_LONG_INT], [1],
+    [Define to 1 if the system has the type 'long long int'.])
+  AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], [1],
+    [Define to 1 if the system has the type 'unsigned long long int'.])
+
+  dnl Check for <wchar.h>, in the same way as gl_WCHAR_H does.
+  AC_CHECK_HEADERS_ONCE([wchar.h])
+  if test $ac_cv_header_wchar_h = yes; then
+    HAVE_WCHAR_H=1
+  else
+    HAVE_WCHAR_H=0
+  fi
+  AC_SUBST([HAVE_WCHAR_H])
+
+  dnl Check for <inttypes.h>.
+  AC_CHECK_HEADERS_ONCE([inttypes.h])
+  if test $ac_cv_header_inttypes_h = yes; then
+    HAVE_INTTYPES_H=1
+  else
+    HAVE_INTTYPES_H=0
+  fi
+  AC_SUBST([HAVE_INTTYPES_H])
+
+  dnl Check for <sys/types.h>.
+  AC_CHECK_HEADERS_ONCE([sys/types.h])
+  if test $ac_cv_header_sys_types_h = yes; then
+    HAVE_SYS_TYPES_H=1
+  else
+    HAVE_SYS_TYPES_H=0
+  fi
+  AC_SUBST([HAVE_SYS_TYPES_H])
+
+  gl_CHECK_NEXT_HEADERS([stdint.h])
+  if test $ac_cv_header_stdint_h = yes; then
+    HAVE_STDINT_H=1
+  else
+    HAVE_STDINT_H=0
+  fi
+  AC_SUBST([HAVE_STDINT_H])
+
+  dnl Now see whether we need a substitute <stdint.h>.
+  if test $ac_cv_header_stdint_h = yes; then
+    AC_CACHE_CHECK([whether stdint.h conforms to C99],
+      [gl_cv_header_working_stdint_h],
+      [gl_cv_header_working_stdint_h=no
+       AC_COMPILE_IFELSE([
+         AC_LANG_PROGRAM([[
+#define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
+#define __STDC_CONSTANT_MACROS 1
+#define __STDC_LIMIT_MACROS 1
+#include <stdint.h>
+/* Dragonfly defines WCHAR_MIN, WCHAR_MAX only in <wchar.h>.  */
+#if !(defined WCHAR_MIN && defined WCHAR_MAX)
+#error "WCHAR_MIN, WCHAR_MAX not defined in <stdint.h>"
+#endif
+]
+gl_STDINT_INCLUDES
+[
+#ifdef INT8_MAX
+int8_t a1 = INT8_MAX;
+int8_t a1min = INT8_MIN;
+#endif
+#ifdef INT16_MAX
+int16_t a2 = INT16_MAX;
+int16_t a2min = INT16_MIN;
+#endif
+#ifdef INT32_MAX
+int32_t a3 = INT32_MAX;
+int32_t a3min = INT32_MIN;
+#endif
+#ifdef INT64_MAX
+int64_t a4 = INT64_MAX;
+int64_t a4min = INT64_MIN;
+#endif
+#ifdef UINT8_MAX
+uint8_t b1 = UINT8_MAX;
+#else
+typedef int b1[(unsigned char) -1 != 255 ? 1 : -1];
+#endif
+#ifdef UINT16_MAX
+uint16_t b2 = UINT16_MAX;
+#endif
+#ifdef UINT32_MAX
+uint32_t b3 = UINT32_MAX;
+#endif
+#ifdef UINT64_MAX
+uint64_t b4 = UINT64_MAX;
+#endif
+int_least8_t c1 = INT8_C (0x7f);
+int_least8_t c1max = INT_LEAST8_MAX;
+int_least8_t c1min = INT_LEAST8_MIN;
+int_least16_t c2 = INT16_C (0x7fff);
+int_least16_t c2max = INT_LEAST16_MAX;
+int_least16_t c2min = INT_LEAST16_MIN;
+int_least32_t c3 = INT32_C (0x7fffffff);
+int_least32_t c3max = INT_LEAST32_MAX;
+int_least32_t c3min = INT_LEAST32_MIN;
+int_least64_t c4 = INT64_C (0x7fffffffffffffff);
+int_least64_t c4max = INT_LEAST64_MAX;
+int_least64_t c4min = INT_LEAST64_MIN;
+uint_least8_t d1 = UINT8_C (0xff);
+uint_least8_t d1max = UINT_LEAST8_MAX;
+uint_least16_t d2 = UINT16_C (0xffff);
+uint_least16_t d2max = UINT_LEAST16_MAX;
+uint_least32_t d3 = UINT32_C (0xffffffff);
+uint_least32_t d3max = UINT_LEAST32_MAX;
+uint_least64_t d4 = UINT64_C (0xffffffffffffffff);
+uint_least64_t d4max = UINT_LEAST64_MAX;
+int_fast8_t e1 = INT_FAST8_MAX;
+int_fast8_t e1min = INT_FAST8_MIN;
+int_fast16_t e2 = INT_FAST16_MAX;
+int_fast16_t e2min = INT_FAST16_MIN;
+int_fast32_t e3 = INT_FAST32_MAX;
+int_fast32_t e3min = INT_FAST32_MIN;
+int_fast64_t e4 = INT_FAST64_MAX;
+int_fast64_t e4min = INT_FAST64_MIN;
+uint_fast8_t f1 = UINT_FAST8_MAX;
+uint_fast16_t f2 = UINT_FAST16_MAX;
+uint_fast32_t f3 = UINT_FAST32_MAX;
+uint_fast64_t f4 = UINT_FAST64_MAX;
+#ifdef INTPTR_MAX
+intptr_t g = INTPTR_MAX;
+intptr_t gmin = INTPTR_MIN;
+#endif
+#ifdef UINTPTR_MAX
+uintptr_t h = UINTPTR_MAX;
+#endif
+intmax_t i = INTMAX_MAX;
+uintmax_t j = UINTMAX_MAX;
+
+/* Check that SIZE_MAX has the correct type, if possible.  */
+#if 201112 <= __STDC_VERSION__
+int k = _Generic (SIZE_MAX, size_t: 0);
+#elif (2 <= __GNUC__ || 4 <= __clang_major__ || defined __IBM__TYPEOF__ \
+       || (0x5110 <= __SUNPRO_C && !__STDC__))
+extern size_t k;
+extern __typeof__ (SIZE_MAX) k;
+#endif
+
+#include <limits.h> /* for CHAR_BIT */
+#define TYPE_MINIMUM(t) \
+  ((t) ((t) 0 < (t) -1 ? (t) 0 : ~ TYPE_MAXIMUM (t)))
+#define TYPE_MAXIMUM(t) \
+  ((t) ((t) 0 < (t) -1 \
+        ? (t) -1 \
+        : ((((t) 1 << (sizeof (t) * CHAR_BIT - 2)) - 1) * 2 + 1)))
+struct s {
+  int check_PTRDIFF:
+      PTRDIFF_MIN == TYPE_MINIMUM (ptrdiff_t)
+      && PTRDIFF_MAX == TYPE_MAXIMUM (ptrdiff_t)
+      ? 1 : -1;
+  /* Detect bug in FreeBSD 6.0/ia64 and FreeBSD 13.0/arm64.  */
+  int check_SIG_ATOMIC:
+      SIG_ATOMIC_MIN == TYPE_MINIMUM (sig_atomic_t)
+      && SIG_ATOMIC_MAX == TYPE_MAXIMUM (sig_atomic_t)
+      ? 1 : -1;
+  int check_SIZE: SIZE_MAX == TYPE_MAXIMUM (size_t) ? 1 : -1;
+  int check_WCHAR:
+      WCHAR_MIN == TYPE_MINIMUM (wchar_t)
+      && WCHAR_MAX == TYPE_MAXIMUM (wchar_t)
+      ? 1 : -1;
+  /* Detect bug in mingw.  */
+  int check_WINT:
+      WINT_MIN == TYPE_MINIMUM (wint_t)
+      && WINT_MAX == TYPE_MAXIMUM (wint_t)
+      ? 1 : -1;
+
+  /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others.  */
+  int check_UINT8_C:
+        (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1;
+  int check_UINT16_C:
+        (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1;
+
+  /* Detect bugs in OpenBSD 3.9 stdint.h.  */
+#ifdef UINT8_MAX
+  int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1;
+#endif
+#ifdef UINT16_MAX
+  int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1;
+#endif
+#ifdef UINT32_MAX
+  int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1;
+#endif
+#ifdef UINT64_MAX
+  int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1;
+#endif
+  int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1;
+  int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1;
+  int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1;
+  int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1;
+  int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1;
+  int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1;
+  int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1;
+  int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1;
+  int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1;
+  int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1;
+  int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1;
+};
+         ]])],
+         [dnl Determine whether the various *_MIN, *_MAX macros are usable
+          dnl in preprocessor expression. We could do it by compiling a test
+          dnl program for each of these macros. It is faster to run a program
+          dnl that inspects the macro expansion.
+          dnl This detects a bug on HP-UX 11.23/ia64.
+          AC_RUN_IFELSE([
+            AC_LANG_PROGRAM([[
+#define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
+#define __STDC_CONSTANT_MACROS 1
+#define __STDC_LIMIT_MACROS 1
+#include <stdint.h>
+]
+gl_STDINT_INCLUDES
+[
+#include <stdio.h>
+#include <string.h>
+#define MVAL(macro) MVAL1(macro)
+#define MVAL1(expression) #expression
+static const char *macro_values[] =
+  {
+#ifdef INT8_MAX
+    MVAL (INT8_MAX),
+#endif
+#ifdef INT16_MAX
+    MVAL (INT16_MAX),
+#endif
+#ifdef INT32_MAX
+    MVAL (INT32_MAX),
+#endif
+#ifdef INT64_MAX
+    MVAL (INT64_MAX),
+#endif
+#ifdef UINT8_MAX
+    MVAL (UINT8_MAX),
+#endif
+#ifdef UINT16_MAX
+    MVAL (UINT16_MAX),
+#endif
+#ifdef UINT32_MAX
+    MVAL (UINT32_MAX),
+#endif
+#ifdef UINT64_MAX
+    MVAL (UINT64_MAX),
+#endif
+    NULL
+  };
+]], [[
+  const char **mv;
+  for (mv = macro_values; *mv != NULL; mv++)
+    {
+      const char *value = *mv;
+      /* Test whether it looks like a cast expression.  */
+      if (strncmp (value, "((unsigned int)"/*)*/, 15) == 0
+          || strncmp (value, "((unsigned short)"/*)*/, 17) == 0
+          || strncmp (value, "((unsigned char)"/*)*/, 16) == 0
+          || strncmp (value, "((int)"/*)*/, 6) == 0
+          || strncmp (value, "((signed short)"/*)*/, 15) == 0
+          || strncmp (value, "((signed char)"/*)*/, 14) == 0)
+        return mv - macro_values + 1;
+    }
+  return 0;
+]])],
+              [gl_cv_header_working_stdint_h=yes],
+              [],
+              [case "$host_os" in
+                         # Guess yes on native Windows.
+                 mingw*) gl_cv_header_working_stdint_h="guessing yes" ;;
+                         # In general, assume it works.
+                 *)      gl_cv_header_working_stdint_h="guessing yes" ;;
+               esac
+              ])
+         ])
+      ])
+  fi
+
+  HAVE_C99_STDINT_H=0
+  HAVE_SYS_BITYPES_H=0
+  HAVE_SYS_INTTYPES_H=0
+  STDINT_H=stdint.h
+  case "$gl_cv_header_working_stdint_h" in
+    *yes)
+      HAVE_C99_STDINT_H=1
+      dnl Now see whether the system <stdint.h> works without
+      dnl __STDC_CONSTANT_MACROS/__STDC_LIMIT_MACROS defined.
+      dnl If not, there would be problems when stdint.h is included from C++.
+      AC_CACHE_CHECK([whether stdint.h works without ISO C predefines],
+        [gl_cv_header_stdint_without_STDC_macros],
+        [gl_cv_header_stdint_without_STDC_macros=no
+         AC_COMPILE_IFELSE([
+           AC_LANG_PROGRAM([[
+#define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
+#include <stdint.h>
+]
+gl_STDINT_INCLUDES
+[
+intmax_t im = INTMAX_MAX;
+int32_t i32 = INT32_C (0x7fffffff);
+           ]])],
+           [gl_cv_header_stdint_without_STDC_macros=yes])
+        ])
+
+      if test $gl_cv_header_stdint_without_STDC_macros = no; then
+        AC_DEFINE([__STDC_CONSTANT_MACROS], [1],
+          [Define to 1 if the system <stdint.h> predates C++11.])
+        AC_DEFINE([__STDC_LIMIT_MACROS], [1],
+          [Define to 1 if the system <stdint.h> predates C++11.])
+      fi
+      AC_CACHE_CHECK([whether stdint.h has UINTMAX_WIDTH etc.],
+        [gl_cv_header_stdint_width],
+        [gl_cv_header_stdint_width=no
+         AC_COMPILE_IFELSE(
+           [AC_LANG_PROGRAM([[
+              /* Work if build is not clean.  */
+              #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1
+              #ifndef __STDC_WANT_IEC_60559_BFP_EXT__
+               #define __STDC_WANT_IEC_60559_BFP_EXT__ 1
+              #endif
+              #include <stdint.h>
+              ]gl_STDINT_INCLUDES[
+              int iw = UINTMAX_WIDTH;
+              ]])],
+           [gl_cv_header_stdint_width=yes])])
+      if test "$gl_cv_header_stdint_width" = yes; then
+        STDINT_H=
+      fi
+      ;;
+    *)
+      dnl Check for <sys/inttypes.h>, and for
+      dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).
+      AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])
+      if test $ac_cv_header_sys_inttypes_h = yes; then
+        HAVE_SYS_INTTYPES_H=1
+      fi
+      if test $ac_cv_header_sys_bitypes_h = yes; then
+        HAVE_SYS_BITYPES_H=1
+      fi
+      gl_STDINT_TYPE_PROPERTIES
+      ;;
+  esac
+
+  dnl The substitute stdint.h needs the substitute limit.h's _GL_INTEGER_WIDTH.
+  gl_REPLACE_LIMITS_H
+
+  AC_SUBST([HAVE_C99_STDINT_H])
+  AC_SUBST([HAVE_SYS_BITYPES_H])
+  AC_SUBST([HAVE_SYS_INTTYPES_H])
+  AC_SUBST([STDINT_H])
+  AM_CONDITIONAL([GL_GENERATE_STDINT_H], [test -n "$STDINT_H"])
+])
+
+dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES)
+dnl Determine the size of each of the given types in bits.
+AC_DEFUN([gl_STDINT_BITSIZEOF],
+[
+  dnl Use a shell loop, to avoid bloating configure, and
+  dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
+  dnl   config.h.in,
+  dnl - extra AC_SUBST calls, so that the right substitutions are made.
+  m4_foreach_w([gltype], [$1],
+    [AH_TEMPLATE([BITSIZEOF_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
+       [Define to the number of bits in type ']gltype['.])])
+  for gltype in $1 ; do
+    AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}],
+      [AC_COMPUTE_INT([result], [sizeof ($gltype) * CHAR_BIT],
+         [$2
+#include <limits.h>], [result=unknown])
+       eval gl_cv_bitsizeof_${gltype}=\$result
+      ])
+    eval result=\$gl_cv_bitsizeof_${gltype}
+    if test $result = unknown; then
+      dnl Use a nonempty default, because some compilers, such as IRIX 5 cc,
+      dnl do a syntax check even on unused #if conditions and give an error
+      dnl on valid C code like this:
+      dnl   #if 0
+      dnl   # if  > 32
+      dnl   # endif
+      dnl   #endif
+      result=0
+    fi
+    GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
+    AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result])
+    eval BITSIZEOF_${GLTYPE}=\$result
+  done
+  m4_foreach_w([gltype], [$1],
+    [AC_SUBST([BITSIZEOF_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
+])
+
+dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES)
+dnl Determine the signedness of each of the given types.
+dnl Define HAVE_SIGNED_TYPE if type is signed.
+AC_DEFUN([gl_CHECK_TYPES_SIGNED],
+[
+  dnl Use a shell loop, to avoid bloating configure, and
+  dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
+  dnl   config.h.in,
+  dnl - extra AC_SUBST calls, so that the right substitutions are made.
+  m4_foreach_w([gltype], [$1],
+    [AH_TEMPLATE([HAVE_SIGNED_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
+       [Define to 1 if ']gltype[' is a signed integer type.])])
+  for gltype in $1 ; do
+    AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed],
+      [AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM([$2[
+            int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])],
+         result=yes, result=no)
+       eval gl_cv_type_${gltype}_signed=\$result
+      ])
+    eval result=\$gl_cv_type_${gltype}_signed
+    GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
+    if test "$result" = yes; then
+      AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], [1])
+      eval HAVE_SIGNED_${GLTYPE}=1
+    else
+      eval HAVE_SIGNED_${GLTYPE}=0
+    fi
+  done
+  m4_foreach_w([gltype], [$1],
+    [AC_SUBST([HAVE_SIGNED_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
+])
+
+dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES)
+dnl Determine the suffix to use for integer constants of the given types.
+dnl Define t_SUFFIX for each such type.
+AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],
+[
+  dnl Use a shell loop, to avoid bloating configure, and
+  dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
+  dnl   config.h.in,
+  dnl - extra AC_SUBST calls, so that the right substitutions are made.
+  m4_foreach_w([gltype], [$1],
+    [AH_TEMPLATE(m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX],
+       [Define to l, ll, u, ul, ull, etc., as suitable for
+        constants of type ']gltype['.])])
+  for gltype in $1 ; do
+    AC_CACHE_CHECK([for $gltype integer literal suffix],
+      [gl_cv_type_${gltype}_suffix],
+      [eval gl_cv_type_${gltype}_suffix=no
+       eval result=\$gl_cv_type_${gltype}_signed
+       if test "$result" = yes; then
+         glsufu=
+       else
+         glsufu=u
+       fi
+       for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do
+         case $glsuf in
+           '')  gltype1='int';;
+           l)   gltype1='long int';;
+           ll)  gltype1='long long int';;
+           i64) gltype1='__int64';;
+           u)   gltype1='unsigned int';;
+           ul)  gltype1='unsigned long int';;
+           ull) gltype1='unsigned long long int';;
+           ui64)gltype1='unsigned __int64';;
+         esac
+         AC_COMPILE_IFELSE(
+           [AC_LANG_PROGRAM([$2[
+              extern $gltype foo;
+              extern $gltype1 foo;]])],
+           [eval gl_cv_type_${gltype}_suffix=\$glsuf])
+         eval result=\$gl_cv_type_${gltype}_suffix
+         test "$result" != no && break
+       done])
+    GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
+    eval result=\$gl_cv_type_${gltype}_suffix
+    test "$result" = no && result=
+    eval ${GLTYPE}_SUFFIX=\$result
+    AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], [$result])
+  done
+  m4_foreach_w([gltype], [$1],
+    [AC_SUBST(m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])])
+])
+
+dnl gl_STDINT_INCLUDES
+AC_DEFUN([gl_STDINT_INCLUDES],
+[[
+  #include <stddef.h>
+  #include <signal.h>
+  #if HAVE_WCHAR_H
+  # include <wchar.h>
+  #endif
+]])
+
+dnl gl_STDINT_TYPE_PROPERTIES
+dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t
+dnl of interest to stdint.in.h.
+AC_DEFUN([gl_STDINT_TYPE_PROPERTIES],
+[
+  AC_REQUIRE([gl_MULTIARCH])
+  if test $APPLE_UNIVERSAL_BUILD = 0; then
+    gl_STDINT_BITSIZEOF([ptrdiff_t size_t],
+      [gl_STDINT_INCLUDES])
+  fi
+  gl_STDINT_BITSIZEOF([sig_atomic_t wchar_t wint_t],
+    [gl_STDINT_INCLUDES])
+  gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t],
+    [gl_STDINT_INCLUDES])
+  gl_cv_type_ptrdiff_t_signed=yes
+  gl_cv_type_size_t_signed=no
+  if test $APPLE_UNIVERSAL_BUILD = 0; then
+    gl_INTEGER_TYPE_SUFFIX([ptrdiff_t size_t],
+      [gl_STDINT_INCLUDES])
+  fi
+  gl_INTEGER_TYPE_SUFFIX([sig_atomic_t wchar_t wint_t],
+    [gl_STDINT_INCLUDES])
+
+  dnl If wint_t is smaller than 'int', it cannot satisfy the ISO C 99
+  dnl requirement that wint_t is "unchanged by default argument promotions".
+  dnl In this case gnulib's <wchar.h> and <wctype.h> override wint_t.
+  dnl Set the variable BITSIZEOF_WINT_T accordingly.
+  if test $GNULIBHEADERS_OVERRIDE_WINT_T = 1; then
+    BITSIZEOF_WINT_T=32
+  fi
+])
diff --git a/src/grep/m4/stdint_h.m4 b/src/grep/m4/stdint_h.m4
new file mode 100644
index 0000000..18aa50a
--- /dev/null
+++ b/src/grep/m4/stdint_h.m4
@@ -0,0 +1,27 @@
+# stdint_h.m4 serial 9
+dnl Copyright (C) 1997-2004, 2006, 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Paul Eggert.
+
+# Define HAVE_STDINT_H_WITH_UINTMAX if <stdint.h> exists,
+# doesn't clash with <sys/types.h>, and declares uintmax_t.
+
+AC_DEFUN([gl_AC_HEADER_STDINT_H],
+[
+  AC_CACHE_CHECK([for stdint.h], [gl_cv_header_stdint_h],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <sys/types.h>
+            #include <stdint.h>]],
+          [[uintmax_t i = (uintmax_t) -1; return !i;]])],
+       [gl_cv_header_stdint_h=yes],
+       [gl_cv_header_stdint_h=no])])
+  if test $gl_cv_header_stdint_h = yes; then
+    AC_DEFINE_UNQUOTED([HAVE_STDINT_H_WITH_UINTMAX], [1],
+      [Define if <stdint.h> exists, doesn't clash with <sys/types.h>,
+       and declares uintmax_t. ])
+  fi
+])
diff --git a/src/grep/m4/stdio_h.m4 b/src/grep/m4/stdio_h.m4
new file mode 100644
index 0000000..e704383
--- /dev/null
+++ b/src/grep/m4/stdio_h.m4
@@ -0,0 +1,232 @@
+# stdio_h.m4 serial 56
+dnl Copyright (C) 2007-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN_ONCE([gl_STDIO_H],
+[
+  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+  AH_VERBATIM([MINGW_ANSI_STDIO],
+[/* Use GNU style printf and scanf.  */
+#ifndef __USE_MINGW_ANSI_STDIO
+# undef __USE_MINGW_ANSI_STDIO
+#endif
+])
+  AC_DEFINE([__USE_MINGW_ANSI_STDIO])
+  gl_NEXT_HEADERS([stdio.h])
+
+  dnl Determine whether __USE_MINGW_ANSI_STDIO makes printf and
+  dnl inttypes.h behave like gnu instead of system; we must give our
+  dnl printf wrapper the right attribute to match.
+  AC_CACHE_CHECK([which flavor of printf attribute matches inttypes macros],
+    [gl_cv_func_printf_attribute_flavor],
+    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+       #define __STDC_FORMAT_MACROS 1
+       #include <stdio.h>
+       #include <inttypes.h>
+       /* For non-mingw systems, compilation will trivially succeed.
+          For mingw, compilation will succeed for older mingw (system
+          printf, "I64d") and fail for newer mingw (gnu printf, "lld"). */
+       #if (defined _WIN32 && ! defined __CYGWIN__) && \
+         (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+       extern char PRIdMAX_probe[sizeof PRIdMAX == sizeof "I64d" ? 1 : -1];
+       #endif
+      ]])], [gl_cv_func_printf_attribute_flavor=system],
+      [gl_cv_func_printf_attribute_flavor=gnu])])
+  if test "$gl_cv_func_printf_attribute_flavor" = gnu; then
+    AC_DEFINE([GNULIB_PRINTF_ATTRIBUTE_FLAVOR_GNU], [1],
+      [Define to 1 if printf and friends should be labeled with
+       attribute "__gnu_printf__" instead of "__printf__"])
+  fi
+
+  dnl This ifdef is necessary to avoid an error "missing file lib/stdio-read.c"
+  dnl "expected source file, required through AC_LIBSOURCES, not found". It is
+  dnl also an optimization, to avoid performing a configure check whose result
+  dnl is not used. But it does not make the test of GNULIB_STDIO_H_NONBLOCKING
+  dnl or GNULIB_NONBLOCKING redundant.
+  m4_ifdef([gl_NONBLOCKING_IO], [
+    gl_NONBLOCKING_IO
+    if test $gl_cv_have_nonblocking != yes; then
+      REPLACE_STDIO_READ_FUNCS=1
+      AC_LIBOBJ([stdio-read])
+    fi
+  ])
+
+  dnl This ifdef is necessary to avoid an error "missing file lib/stdio-write.c"
+  dnl "expected source file, required through AC_LIBSOURCES, not found". It is
+  dnl also an optimization, to avoid performing a configure check whose result
+  dnl is not used. But it does not make the test of GNULIB_STDIO_H_SIGPIPE or
+  dnl GNULIB_SIGPIPE redundant.
+  m4_ifdef([gl_SIGNAL_SIGPIPE], [
+    gl_SIGNAL_SIGPIPE
+    if test $gl_cv_header_signal_h_SIGPIPE != yes; then
+      REPLACE_STDIO_WRITE_FUNCS=1
+      AC_LIBOBJ([stdio-write])
+    fi
+  ])
+  dnl This ifdef is necessary to avoid an error "missing file lib/stdio-write.c"
+  dnl "expected source file, required through AC_LIBSOURCES, not found". It is
+  dnl also an optimization, to avoid performing a configure check whose result
+  dnl is not used. But it does not make the test of GNULIB_STDIO_H_NONBLOCKING
+  dnl or GNULIB_NONBLOCKING redundant.
+  m4_ifdef([gl_NONBLOCKING_IO], [
+    gl_NONBLOCKING_IO
+    if test $gl_cv_have_nonblocking != yes; then
+      REPLACE_STDIO_WRITE_FUNCS=1
+      AC_LIBOBJ([stdio-write])
+    fi
+  ])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use, and which is not
+  dnl guaranteed by both C89 and C11.
+  gl_WARN_ON_USE_PREPARE([[#include <stdio.h>
+    ]], [dprintf fpurge fseeko ftello getdelim getline gets pclose popen
+    renameat snprintf tmpfile vdprintf vsnprintf])
+
+  AC_REQUIRE([AC_C_RESTRICT])
+
+  AC_CHECK_DECLS_ONCE([fcloseall])
+  if test $ac_cv_have_decl_fcloseall = no; then
+    HAVE_DECL_FCLOSEALL=0
+  fi
+])
+
+# gl_STDIO_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_STDIO_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_STDIO_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_STDIO_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_STDIO_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_DPRINTF])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FCLOSE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FDOPEN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FFLUSH])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FGETC])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FGETS])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FOPEN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FPRINTF])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FPRINTF_POSIX])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FPURGE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FPUTC])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FPUTS])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FREAD])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FREOPEN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FSCANF])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FSEEK])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FSEEKO])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FTELL])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FTELLO])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FWRITE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETC])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETCHAR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETDELIM])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETLINE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_OBSTACK_PRINTF])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_OBSTACK_PRINTF_POSIX])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PCLOSE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PERROR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POPEN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PRINTF])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PRINTF_POSIX])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PUTC])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PUTCHAR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PUTS])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_REMOVE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_RENAME])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_RENAMEAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SCANF])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SNPRINTF])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SPRINTF_POSIX])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STDIO_H_NONBLOCKING])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STDIO_H_SIGPIPE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TMPFILE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_VASPRINTF])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_VFSCANF])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_VSCANF])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_VDPRINTF])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_VFPRINTF])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_VFPRINTF_POSIX])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_VPRINTF])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_VPRINTF_POSIX])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_VSNPRINTF])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_VSPRINTF_POSIX])
+    dnl Support Microsoft deprecated alias function names by default.
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_FCLOSEALL], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_FDOPEN], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_FILENO], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_GETW], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_PUTW], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_TEMPNAM], [1])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_STDIO_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_STDIO_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_DECL_FCLOSEALL=1;         AC_SUBST([HAVE_DECL_FCLOSEALL])
+  HAVE_DECL_FPURGE=1;            AC_SUBST([HAVE_DECL_FPURGE])
+  HAVE_DECL_FSEEKO=1;            AC_SUBST([HAVE_DECL_FSEEKO])
+  HAVE_DECL_FTELLO=1;            AC_SUBST([HAVE_DECL_FTELLO])
+  HAVE_DECL_GETDELIM=1;          AC_SUBST([HAVE_DECL_GETDELIM])
+  HAVE_DECL_GETLINE=1;           AC_SUBST([HAVE_DECL_GETLINE])
+  HAVE_DECL_OBSTACK_PRINTF=1;    AC_SUBST([HAVE_DECL_OBSTACK_PRINTF])
+  HAVE_DECL_SNPRINTF=1;          AC_SUBST([HAVE_DECL_SNPRINTF])
+  HAVE_DECL_VSNPRINTF=1;         AC_SUBST([HAVE_DECL_VSNPRINTF])
+  HAVE_DPRINTF=1;                AC_SUBST([HAVE_DPRINTF])
+  HAVE_FSEEKO=1;                 AC_SUBST([HAVE_FSEEKO])
+  HAVE_FTELLO=1;                 AC_SUBST([HAVE_FTELLO])
+  HAVE_PCLOSE=1;                 AC_SUBST([HAVE_PCLOSE])
+  HAVE_POPEN=1;                  AC_SUBST([HAVE_POPEN])
+  HAVE_RENAMEAT=1;               AC_SUBST([HAVE_RENAMEAT])
+  HAVE_VASPRINTF=1;              AC_SUBST([HAVE_VASPRINTF])
+  HAVE_VDPRINTF=1;               AC_SUBST([HAVE_VDPRINTF])
+  REPLACE_DPRINTF=0;             AC_SUBST([REPLACE_DPRINTF])
+  REPLACE_FCLOSE=0;              AC_SUBST([REPLACE_FCLOSE])
+  REPLACE_FDOPEN=0;              AC_SUBST([REPLACE_FDOPEN])
+  REPLACE_FFLUSH=0;              AC_SUBST([REPLACE_FFLUSH])
+  REPLACE_FOPEN=0;               AC_SUBST([REPLACE_FOPEN])
+  REPLACE_FPRINTF=0;             AC_SUBST([REPLACE_FPRINTF])
+  REPLACE_FPURGE=0;              AC_SUBST([REPLACE_FPURGE])
+  REPLACE_FREOPEN=0;             AC_SUBST([REPLACE_FREOPEN])
+  REPLACE_FSEEK=0;               AC_SUBST([REPLACE_FSEEK])
+  REPLACE_FSEEKO=0;              AC_SUBST([REPLACE_FSEEKO])
+  REPLACE_FTELL=0;               AC_SUBST([REPLACE_FTELL])
+  REPLACE_FTELLO=0;              AC_SUBST([REPLACE_FTELLO])
+  REPLACE_GETDELIM=0;            AC_SUBST([REPLACE_GETDELIM])
+  REPLACE_GETLINE=0;             AC_SUBST([REPLACE_GETLINE])
+  REPLACE_OBSTACK_PRINTF=0;      AC_SUBST([REPLACE_OBSTACK_PRINTF])
+  REPLACE_PERROR=0;              AC_SUBST([REPLACE_PERROR])
+  REPLACE_POPEN=0;               AC_SUBST([REPLACE_POPEN])
+  REPLACE_PRINTF=0;              AC_SUBST([REPLACE_PRINTF])
+  REPLACE_REMOVE=0;              AC_SUBST([REPLACE_REMOVE])
+  REPLACE_RENAME=0;              AC_SUBST([REPLACE_RENAME])
+  REPLACE_RENAMEAT=0;            AC_SUBST([REPLACE_RENAMEAT])
+  REPLACE_SNPRINTF=0;            AC_SUBST([REPLACE_SNPRINTF])
+  REPLACE_SPRINTF=0;             AC_SUBST([REPLACE_SPRINTF])
+  REPLACE_STDIO_READ_FUNCS=0;    AC_SUBST([REPLACE_STDIO_READ_FUNCS])
+  REPLACE_STDIO_WRITE_FUNCS=0;   AC_SUBST([REPLACE_STDIO_WRITE_FUNCS])
+  REPLACE_TMPFILE=0;             AC_SUBST([REPLACE_TMPFILE])
+  REPLACE_VASPRINTF=0;           AC_SUBST([REPLACE_VASPRINTF])
+  REPLACE_VDPRINTF=0;            AC_SUBST([REPLACE_VDPRINTF])
+  REPLACE_VFPRINTF=0;            AC_SUBST([REPLACE_VFPRINTF])
+  REPLACE_VPRINTF=0;             AC_SUBST([REPLACE_VPRINTF])
+  REPLACE_VSNPRINTF=0;           AC_SUBST([REPLACE_VSNPRINTF])
+  REPLACE_VSPRINTF=0;            AC_SUBST([REPLACE_VSPRINTF])
+])
diff --git a/src/grep/m4/stdlib_h.m4 b/src/grep/m4/stdlib_h.m4
new file mode 100644
index 0000000..9c1d1c7
--- /dev/null
+++ b/src/grep/m4/stdlib_h.m4
@@ -0,0 +1,194 @@
+# stdlib_h.m4 serial 63
+dnl Copyright (C) 2007-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN_ONCE([gl_STDLIB_H],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  gl_NEXT_HEADERS([stdlib.h])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use, and which is not
+  dnl guaranteed by C89.
+  gl_WARN_ON_USE_PREPARE([[#include <stdlib.h>
+#if HAVE_SYS_LOADAVG_H
+/* OpenIndiana has a bug: <sys/time.h> must be included before
+   <sys/loadavg.h>.  */
+# include <sys/time.h>
+# include <sys/loadavg.h>
+#endif
+#if HAVE_RANDOM_H
+# include <random.h>
+#endif
+    ]], [_Exit aligned_alloc atoll canonicalize_file_name free
+    getloadavg getsubopt grantpt
+    initstate initstate_r mbtowc mkdtemp mkostemp mkostemps mkstemp mkstemps
+    posix_memalign posix_openpt ptsname ptsname_r qsort_r
+    random random_r reallocarray realpath rpmatch secure_getenv setenv
+    setstate setstate_r srandom srandom_r
+    strtod strtol strtold strtoll strtoul strtoull unlockpt unsetenv])
+
+  AC_REQUIRE([AC_C_RESTRICT])
+
+  AC_CHECK_DECLS_ONCE([ecvt])
+  if test $ac_cv_have_decl_ecvt = no; then
+    HAVE_DECL_ECVT=0
+  fi
+  AC_CHECK_DECLS_ONCE([fcvt])
+  if test $ac_cv_have_decl_fcvt = no; then
+    HAVE_DECL_FCVT=0
+  fi
+  AC_CHECK_DECLS_ONCE([gcvt])
+  if test $ac_cv_have_decl_gcvt = no; then
+    HAVE_DECL_GCVT=0
+  fi
+])
+
+# gl_STDLIB_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_STDLIB_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_STDLIB_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_STDLIB_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_STDLIB_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB__EXIT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ALIGNED_ALLOC])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ATOLL])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_CALLOC_POSIX])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_CANONICALIZE_FILE_NAME])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FREE_POSIX])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETLOADAVG])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETSUBOPT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GRANTPT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MALLOC_POSIX])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBTOWC])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKDTEMP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKOSTEMP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKOSTEMPS])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKSTEMP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKSTEMPS])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_MEMALIGN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_OPENPT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PTSNAME])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PTSNAME_R])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PUTENV])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_QSORT_R])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_RANDOM])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_RANDOM_R])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_REALLOCARRAY])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_REALLOC_POSIX])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_REALPATH])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_RPMATCH])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SECURE_GETENV])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SETENV])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRTOD])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRTOL])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRTOLD])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRTOLL])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRTOUL])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRTOULL])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SYSTEM_POSIX])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_UNLOCKPT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_UNSETENV])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCTOMB])
+    dnl Support Microsoft deprecated alias function names by default.
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_ECVT], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_FCVT], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_GCVT], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_MKTEMP], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_PUTENV], [1])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_STDLIB_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_STDLIB_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE__EXIT=1;              AC_SUBST([HAVE__EXIT])
+  HAVE_ALIGNED_ALLOC=1;      AC_SUBST([HAVE_ALIGNED_ALLOC])
+  HAVE_ATOLL=1;              AC_SUBST([HAVE_ATOLL])
+  HAVE_CANONICALIZE_FILE_NAME=1;  AC_SUBST([HAVE_CANONICALIZE_FILE_NAME])
+  HAVE_DECL_ECVT=1;          AC_SUBST([HAVE_DECL_ECVT])
+  HAVE_DECL_FCVT=1;          AC_SUBST([HAVE_DECL_FCVT])
+  HAVE_DECL_GCVT=1;          AC_SUBST([HAVE_DECL_GCVT])
+  HAVE_DECL_GETLOADAVG=1;    AC_SUBST([HAVE_DECL_GETLOADAVG])
+  HAVE_GETSUBOPT=1;          AC_SUBST([HAVE_GETSUBOPT])
+  HAVE_GRANTPT=1;            AC_SUBST([HAVE_GRANTPT])
+  HAVE_INITSTATE=1;          AC_SUBST([HAVE_INITSTATE])
+  HAVE_DECL_INITSTATE=1;     AC_SUBST([HAVE_DECL_INITSTATE])
+  HAVE_MBTOWC=1;             AC_SUBST([HAVE_MBTOWC])
+  HAVE_MKDTEMP=1;            AC_SUBST([HAVE_MKDTEMP])
+  HAVE_MKOSTEMP=1;           AC_SUBST([HAVE_MKOSTEMP])
+  HAVE_MKOSTEMPS=1;          AC_SUBST([HAVE_MKOSTEMPS])
+  HAVE_MKSTEMP=1;            AC_SUBST([HAVE_MKSTEMP])
+  HAVE_MKSTEMPS=1;           AC_SUBST([HAVE_MKSTEMPS])
+  HAVE_POSIX_MEMALIGN=1;     AC_SUBST([HAVE_POSIX_MEMALIGN])
+  HAVE_POSIX_OPENPT=1;       AC_SUBST([HAVE_POSIX_OPENPT])
+  HAVE_PTSNAME=1;            AC_SUBST([HAVE_PTSNAME])
+  HAVE_PTSNAME_R=1;          AC_SUBST([HAVE_PTSNAME_R])
+  HAVE_QSORT_R=1;            AC_SUBST([HAVE_QSORT_R])
+  HAVE_RANDOM=1;             AC_SUBST([HAVE_RANDOM])
+  HAVE_RANDOM_H=1;           AC_SUBST([HAVE_RANDOM_H])
+  HAVE_RANDOM_R=1;           AC_SUBST([HAVE_RANDOM_R])
+  HAVE_REALLOCARRAY=1;       AC_SUBST([HAVE_REALLOCARRAY])
+  HAVE_REALPATH=1;           AC_SUBST([HAVE_REALPATH])
+  HAVE_RPMATCH=1;            AC_SUBST([HAVE_RPMATCH])
+  HAVE_SECURE_GETENV=1;      AC_SUBST([HAVE_SECURE_GETENV])
+  HAVE_SETENV=1;             AC_SUBST([HAVE_SETENV])
+  HAVE_DECL_SETENV=1;        AC_SUBST([HAVE_DECL_SETENV])
+  HAVE_SETSTATE=1;           AC_SUBST([HAVE_SETSTATE])
+  HAVE_DECL_SETSTATE=1;      AC_SUBST([HAVE_DECL_SETSTATE])
+  HAVE_STRTOD=1;             AC_SUBST([HAVE_STRTOD])
+  HAVE_STRTOL=1;             AC_SUBST([HAVE_STRTOL])
+  HAVE_STRTOLD=1;            AC_SUBST([HAVE_STRTOLD])
+  HAVE_STRTOLL=1;            AC_SUBST([HAVE_STRTOLL])
+  HAVE_STRTOUL=1;            AC_SUBST([HAVE_STRTOUL])
+  HAVE_STRTOULL=1;           AC_SUBST([HAVE_STRTOULL])
+  HAVE_STRUCT_RANDOM_DATA=1; AC_SUBST([HAVE_STRUCT_RANDOM_DATA])
+  HAVE_SYS_LOADAVG_H=0;      AC_SUBST([HAVE_SYS_LOADAVG_H])
+  HAVE_UNLOCKPT=1;           AC_SUBST([HAVE_UNLOCKPT])
+  HAVE_DECL_UNSETENV=1;      AC_SUBST([HAVE_DECL_UNSETENV])
+  REPLACE_ALIGNED_ALLOC=0;   AC_SUBST([REPLACE_ALIGNED_ALLOC])
+  REPLACE_CALLOC=0;          AC_SUBST([REPLACE_CALLOC])
+  REPLACE_CANONICALIZE_FILE_NAME=0;  AC_SUBST([REPLACE_CANONICALIZE_FILE_NAME])
+  REPLACE_FREE=0;            AC_SUBST([REPLACE_FREE])
+  REPLACE_INITSTATE=0;       AC_SUBST([REPLACE_INITSTATE])
+  REPLACE_MALLOC=0;          AC_SUBST([REPLACE_MALLOC])
+  REPLACE_MBTOWC=0;          AC_SUBST([REPLACE_MBTOWC])
+  REPLACE_MKSTEMP=0;         AC_SUBST([REPLACE_MKSTEMP])
+  REPLACE_POSIX_MEMALIGN=0;  AC_SUBST([REPLACE_POSIX_MEMALIGN])
+  REPLACE_PTSNAME=0;         AC_SUBST([REPLACE_PTSNAME])
+  REPLACE_PTSNAME_R=0;       AC_SUBST([REPLACE_PTSNAME_R])
+  REPLACE_PUTENV=0;          AC_SUBST([REPLACE_PUTENV])
+  REPLACE_QSORT_R=0;         AC_SUBST([REPLACE_QSORT_R])
+  REPLACE_RANDOM=0;          AC_SUBST([REPLACE_RANDOM])
+  REPLACE_RANDOM_R=0;        AC_SUBST([REPLACE_RANDOM_R])
+  REPLACE_REALLOC=0;         AC_SUBST([REPLACE_REALLOC])
+  REPLACE_REALLOCARRAY=0;    AC_SUBST([REPLACE_REALLOCARRAY])
+  REPLACE_REALPATH=0;        AC_SUBST([REPLACE_REALPATH])
+  REPLACE_SETENV=0;          AC_SUBST([REPLACE_SETENV])
+  REPLACE_SETSTATE=0;        AC_SUBST([REPLACE_SETSTATE])
+  REPLACE_STRTOD=0;          AC_SUBST([REPLACE_STRTOD])
+  REPLACE_STRTOL=0;          AC_SUBST([REPLACE_STRTOL])
+  REPLACE_STRTOLD=0;         AC_SUBST([REPLACE_STRTOLD])
+  REPLACE_STRTOLL=0;         AC_SUBST([REPLACE_STRTOLL])
+  REPLACE_STRTOUL=0;         AC_SUBST([REPLACE_STRTOUL])
+  REPLACE_STRTOULL=0;        AC_SUBST([REPLACE_STRTOULL])
+  REPLACE_UNSETENV=0;        AC_SUBST([REPLACE_UNSETENV])
+  REPLACE_WCTOMB=0;          AC_SUBST([REPLACE_WCTOMB])
+])
diff --git a/src/grep/m4/stpcpy.m4 b/src/grep/m4/stpcpy.m4
new file mode 100644
index 0000000..eb44f03
--- /dev/null
+++ b/src/grep/m4/stpcpy.m4
@@ -0,0 +1,25 @@
+# stpcpy.m4 serial 9
+dnl Copyright (C) 2002, 2007, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_STPCPY],
+[
+  dnl Persuade glibc <string.h> to declare stpcpy().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  dnl The stpcpy() declaration in lib/string.in.h uses 'restrict'.
+  AC_REQUIRE([AC_C_RESTRICT])
+
+  AC_REQUIRE([gl_STRING_H_DEFAULTS])
+  AC_CHECK_FUNCS([stpcpy])
+  if test $ac_cv_func_stpcpy = no; then
+    HAVE_STPCPY=0
+  fi
+])
+
+# Prerequisites of lib/stpcpy.c.
+AC_DEFUN([gl_PREREQ_STPCPY], [
+  :
+])
diff --git a/src/grep/m4/strdup.m4 b/src/grep/m4/strdup.m4
new file mode 100644
index 0000000..5b6018f
--- /dev/null
+++ b/src/grep/m4/strdup.m4
@@ -0,0 +1,32 @@
+# strdup.m4 serial 15
+
+dnl Copyright (C) 2002-2021 Free Software Foundation, Inc.
+
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_STRDUP],
+[
+  AC_REQUIRE([gl_STRING_H_DEFAULTS])
+  AC_CHECK_DECLS_ONCE([strdup])
+  if test $ac_cv_have_decl_strdup = no; then
+    HAVE_DECL_STRDUP=0
+  fi
+])
+
+AC_DEFUN([gl_FUNC_STRDUP_POSIX],
+[
+  AC_REQUIRE([gl_STRING_H_DEFAULTS])
+  AC_REQUIRE([gl_CHECK_MALLOC_POSIX])
+  if test $gl_cv_func_malloc_posix != yes; then
+    REPLACE_STRDUP=1
+  fi
+  AC_CHECK_DECLS_ONCE([strdup])
+  if test $ac_cv_have_decl_strdup = no; then
+    HAVE_DECL_STRDUP=0
+  fi
+])
+
+# Prerequisites of lib/strdup.c.
+AC_DEFUN([gl_PREREQ_STRDUP], [:])
diff --git a/src/grep/m4/strerror.m4 b/src/grep/m4/strerror.m4
new file mode 100644
index 0000000..438ba92
--- /dev/null
+++ b/src/grep/m4/strerror.m4
@@ -0,0 +1,102 @@
+# strerror.m4 serial 22
+dnl Copyright (C) 2002, 2007-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_STRERROR],
+[
+  AC_REQUIRE([gl_STRING_H_DEFAULTS])
+  AC_REQUIRE([gl_HEADER_ERRNO_H])
+  AC_REQUIRE([gl_FUNC_STRERROR_0])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  m4_ifdef([gl_FUNC_STRERROR_R_WORKS], [
+    AC_REQUIRE([gl_FUNC_STRERROR_R_WORKS])
+  ])
+  if test "$ERRNO_H:$REPLACE_STRERROR_0" = :0; then
+    AC_CACHE_CHECK([for working strerror function],
+     [gl_cv_func_working_strerror],
+     [AC_RUN_IFELSE(
+        [AC_LANG_PROGRAM(
+           [[#include <string.h>
+           ]],
+           [[if (!*strerror (-2)) return 1;]])],
+        [gl_cv_func_working_strerror=yes],
+        [gl_cv_func_working_strerror=no],
+        [case "$host_os" in
+                          # Guess yes on glibc systems.
+           *-gnu* | gnu*) gl_cv_func_working_strerror="guessing yes" ;;
+                          # Guess yes on musl systems.
+           *-musl*)       gl_cv_func_working_strerror="guessing yes" ;;
+                          # If we don't know, obey --enable-cross-guesses.
+           *)             gl_cv_func_working_strerror="$gl_cross_guess_normal" ;;
+         esac
+        ])
+    ])
+    case "$gl_cv_func_working_strerror" in
+      *yes) ;;
+      *)
+        dnl The system's strerror() fails to return a string for out-of-range
+        dnl integers. Replace it.
+        REPLACE_STRERROR=1
+        ;;
+    esac
+    m4_ifdef([gl_FUNC_STRERROR_R_WORKS], [
+      dnl If the system's strerror_r or __xpg_strerror_r clobbers strerror's
+      dnl buffer, we must replace strerror.
+      case "$gl_cv_func_strerror_r_works" in
+        *no) REPLACE_STRERROR=1 ;;
+      esac
+    ])
+  else
+    dnl The system's strerror() cannot know about the new errno values we add
+    dnl to <errno.h>, or any fix for strerror(0). Replace it.
+    REPLACE_STRERROR=1
+  fi
+])
+
+dnl Detect if strerror(0) passes (that is, does not set errno, and does not
+dnl return a string that matches strerror(-1)).
+AC_DEFUN([gl_FUNC_STRERROR_0],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  REPLACE_STRERROR_0=0
+  AC_CACHE_CHECK([whether strerror(0) succeeds],
+   [gl_cv_func_strerror_0_works],
+   [AC_RUN_IFELSE(
+      [AC_LANG_PROGRAM(
+         [[#include <string.h>
+           #include <errno.h>
+         ]],
+         [[int result = 0;
+           char *str;
+           errno = 0;
+           str = strerror (0);
+           if (!*str) result |= 1;
+           if (errno) result |= 2;
+           if (strstr (str, "nknown") || strstr (str, "ndefined"))
+             result |= 4;
+           return result;]])],
+      [gl_cv_func_strerror_0_works=yes],
+      [gl_cv_func_strerror_0_works=no],
+      [case "$host_os" in
+                        # Guess yes on glibc systems.
+         *-gnu* | gnu*) gl_cv_func_strerror_0_works="guessing yes" ;;
+                        # Guess yes on musl systems.
+         *-musl*)       gl_cv_func_strerror_0_works="guessing yes" ;;
+                        # Guess yes on native Windows.
+         mingw*)        gl_cv_func_strerror_0_works="guessing yes" ;;
+                        # If we don't know, obey --enable-cross-guesses.
+         *)             gl_cv_func_strerror_0_works="$gl_cross_guess_normal" ;;
+       esac
+      ])
+  ])
+  case "$gl_cv_func_strerror_0_works" in
+    *yes) ;;
+    *)
+      REPLACE_STRERROR_0=1
+      AC_DEFINE([REPLACE_STRERROR_0], [1], [Define to 1 if strerror(0)
+        does not return a message implying success.])
+      ;;
+  esac
+])
diff --git a/src/grep/m4/strerror_r.m4 b/src/grep/m4/strerror_r.m4
new file mode 100644
index 0000000..0689e46
--- /dev/null
+++ b/src/grep/m4/strerror_r.m4
@@ -0,0 +1,173 @@
+# strerror_r.m4 serial 21
+dnl Copyright (C) 2002, 2007-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_STRERROR_R],
+[
+  AC_REQUIRE([gl_STRING_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_STRERROR_R_WORKS])
+
+  dnl Persuade Solaris <string.h> to declare strerror_r().
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+  dnl Some systems don't declare strerror_r() if _THREAD_SAFE and _REENTRANT
+  dnl are not defined.
+  AC_CHECK_DECLS_ONCE([strerror_r])
+  if test $ac_cv_have_decl_strerror_r = no; then
+    HAVE_DECL_STRERROR_R=0
+  fi
+
+  if test $ac_cv_func_strerror_r = yes; then
+    if test "$ERRNO_H:$REPLACE_STRERROR_0" = :0; then
+      if test $gl_cv_func_strerror_r_posix_signature = yes; then
+        case "$gl_cv_func_strerror_r_works" in
+          dnl The system's strerror_r has bugs.  Replace it.
+          *no) REPLACE_STRERROR_R=1 ;;
+        esac
+      else
+        dnl The system's strerror_r() has a wrong signature. Replace it.
+        REPLACE_STRERROR_R=1
+      fi
+    else
+      dnl The system's strerror_r() cannot know about the new errno values we
+      dnl add to <errno.h>, or any fix for strerror(0). Replace it.
+      REPLACE_STRERROR_R=1
+    fi
+  fi
+])
+
+# Prerequisites of lib/strerror_r.c.
+AC_DEFUN([gl_PREREQ_STRERROR_R], [
+  dnl glibc >= 2.3.4 and cygwin 1.7.9 have a function __xpg_strerror_r.
+  AC_CHECK_FUNCS_ONCE([__xpg_strerror_r])
+  AC_CHECK_FUNCS_ONCE([catgets])
+  AC_CHECK_FUNCS_ONCE([snprintf])
+])
+
+# Detect if strerror_r works, but without affecting whether a replacement
+# strerror_r will be used.
+AC_DEFUN([gl_FUNC_STRERROR_R_WORKS],
+[
+  AC_REQUIRE([gl_HEADER_ERRNO_H])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_REQUIRE([gl_FUNC_STRERROR_0])
+
+  AC_CHECK_FUNCS_ONCE([strerror_r])
+  if test $ac_cv_func_strerror_r = yes; then
+    if test "$ERRNO_H:$REPLACE_STRERROR_0" = :0; then
+      dnl The POSIX prototype is:  int strerror_r (int, char *, size_t);
+      dnl glibc, Cygwin:           char *strerror_r (int, char *, size_t);
+      dnl AIX 5.1, OSF/1 5.1:      int strerror_r (int, char *, int);
+      AC_CACHE_CHECK([for strerror_r with POSIX signature],
+        [gl_cv_func_strerror_r_posix_signature],
+        [AC_COMPILE_IFELSE(
+           [AC_LANG_PROGRAM(
+              [[#include <string.h>
+                int strerror_r (int, char *, size_t);
+              ]],
+              [])],
+           [gl_cv_func_strerror_r_posix_signature=yes],
+           [gl_cv_func_strerror_r_posix_signature=no])
+        ])
+      if test $gl_cv_func_strerror_r_posix_signature = yes; then
+        dnl AIX 6.1 strerror_r fails by returning -1, not an error number.
+        dnl HP-UX 11.31 strerror_r always fails when the buffer length argument
+        dnl is less than 80.
+        dnl FreeBSD 8.s strerror_r claims failure on 0
+        dnl Mac OS X 10.5 strerror_r treats 0 like -1
+        dnl Solaris 10 strerror_r corrupts errno on failure
+        AC_CACHE_CHECK([whether strerror_r works],
+          [gl_cv_func_strerror_r_works],
+          [AC_RUN_IFELSE(
+             [AC_LANG_PROGRAM(
+                [[#include <errno.h>
+                  #include <string.h>
+                ]],
+                [[int result = 0;
+                  char buf[79];
+                  if (strerror_r (EACCES, buf, 0) < 0)
+                    result |= 1;
+                  errno = 0;
+                  if (strerror_r (EACCES, buf, sizeof buf) != 0)
+                    result |= 2;
+                  strcpy (buf, "Unknown");
+                  if (strerror_r (0, buf, sizeof buf) != 0)
+                    result |= 4;
+                  if (errno)
+                    result |= 8;
+                  if (strstr (buf, "nknown") || strstr (buf, "ndefined"))
+                    result |= 0x10;
+                  errno = 0;
+                  *buf = 0;
+                  if (strerror_r (-3, buf, sizeof buf) < 0)
+                    result |= 0x20;
+                  if (errno)
+                    result |= 0x40;
+                  if (!*buf)
+                    result |= 0x80;
+                  return result;
+                ]])],
+             [gl_cv_func_strerror_r_works=yes],
+             [gl_cv_func_strerror_r_works=no],
+             [
+changequote(,)dnl
+              case "$host_os" in
+                       # Guess no on AIX.
+                aix*)  gl_cv_func_strerror_r_works="guessing no";;
+                       # Guess no on HP-UX.
+                hpux*) gl_cv_func_strerror_r_works="guessing no";;
+                       # Guess no on BSD variants.
+                *bsd*)  gl_cv_func_strerror_r_works="guessing no";;
+                       # Guess yes otherwise.
+                *)     gl_cv_func_strerror_r_works="guessing yes";;
+              esac
+changequote([,])dnl
+             ])
+          ])
+      else
+        dnl The system's strerror() has a wrong signature.
+        dnl glibc >= 2.3.4 and cygwin 1.7.9 have a function __xpg_strerror_r.
+        AC_CHECK_FUNCS_ONCE([__xpg_strerror_r])
+        dnl In glibc < 2.14, __xpg_strerror_r does not populate buf on failure.
+        dnl In cygwin < 1.7.10, __xpg_strerror_r clobbers strerror's buffer.
+        if test $ac_cv_func___xpg_strerror_r = yes; then
+          AC_CACHE_CHECK([whether __xpg_strerror_r works],
+            [gl_cv_func_strerror_r_works],
+            [AC_RUN_IFELSE(
+               [AC_LANG_PROGRAM(
+                  [[#include <errno.h>
+                    #include <string.h>
+                    extern
+                    #ifdef __cplusplus
+                    "C"
+                    #endif
+                    int __xpg_strerror_r(int, char *, size_t);
+                  ]],
+                  [[int result = 0;
+                    char buf[256] = "^";
+                    char copy[256];
+                    char *str = strerror (-1);
+                    strcpy (copy, str);
+                    if (__xpg_strerror_r (-2, buf, 1) == 0)
+                      result |= 1;
+                    if (*buf)
+                      result |= 2;
+                    __xpg_strerror_r (-2, buf, 256);
+                    if (strcmp (str, copy))
+                      result |= 4;
+                    return result;
+                  ]])],
+               [gl_cv_func_strerror_r_works=yes],
+               [gl_cv_func_strerror_r_works=no],
+               [dnl Guess no on all platforms that have __xpg_strerror_r,
+                dnl at least until fixed glibc and cygwin are more common.
+                gl_cv_func_strerror_r_works="$gl_cross_guess_normal"
+               ])
+            ])
+        fi
+      fi
+    fi
+  fi
+])
diff --git a/src/grep/m4/string_h.m4 b/src/grep/m4/string_h.m4
new file mode 100644
index 0000000..80d1e58
--- /dev/null
+++ b/src/grep/m4/string_h.m4
@@ -0,0 +1,143 @@
+# Configure a GNU-like replacement for <string.h>.
+
+# Copyright (C) 2007-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# serial 32
+
+# Written by Paul Eggert.
+
+AC_DEFUN_ONCE([gl_STRING_H],
+[
+  dnl Ensure to expand the default settings once only, before all statements
+  dnl that occur in other macros.
+  AC_REQUIRE([gl_STRING_H_DEFAULTS])
+  gl_NEXT_HEADERS([string.h])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use, and which is not
+  dnl guaranteed by C89.
+  gl_WARN_ON_USE_PREPARE([[#include <string.h>
+    ]],
+    [ffsl ffsll memmem mempcpy memrchr rawmemchr stpcpy stpncpy strchrnul
+     strdup strncat strndup strnlen strpbrk strsep strcasestr strtok_r
+     strerror_r strerrorname_np sigabbrev_np sigdescr_np strsignal strverscmp])
+
+  AC_REQUIRE([AC_C_RESTRICT])
+])
+
+# gl_STRING_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_STRING_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_STRING_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_STRING_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_STRING_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_EXPLICIT_BZERO])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FFSL])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FFSLL])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MEMCHR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MEMMEM])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MEMPCPY])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MEMRCHR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_RAWMEMCHR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STPCPY])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STPNCPY])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRCHRNUL])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRDUP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRNCAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRNDUP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRNLEN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRPBRK])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRSEP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRSTR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRCASESTR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRTOK_R])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSLEN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSNLEN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSCHR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSRCHR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSSTR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSCASECMP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSNCASECMP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSPCASECMP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSCASESTR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSCSPN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSPBRK])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSSPN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSSEP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSTOK_R])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRERROR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRERROR_R])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRERRORNAME_NP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SIGABBREV_NP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SIGDESCR_NP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRSIGNAL])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRVERSCMP])
+    dnl Support Microsoft deprecated alias function names by default.
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_MEMCCPY], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_STRDUP], [1])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_STRING_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_STRING_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_STRING_H_DEFAULTS],
+[
+  HAVE_MBSLEN=0;             AC_SUBST([HAVE_MBSLEN])
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_EXPLICIT_BZERO=1;        AC_SUBST([HAVE_EXPLICIT_BZERO])
+  HAVE_FFSL=1;                  AC_SUBST([HAVE_FFSL])
+  HAVE_FFSLL=1;                 AC_SUBST([HAVE_FFSLL])
+  HAVE_DECL_MEMMEM=1;           AC_SUBST([HAVE_DECL_MEMMEM])
+  HAVE_MEMPCPY=1;               AC_SUBST([HAVE_MEMPCPY])
+  HAVE_DECL_MEMRCHR=1;          AC_SUBST([HAVE_DECL_MEMRCHR])
+  HAVE_RAWMEMCHR=1;             AC_SUBST([HAVE_RAWMEMCHR])
+  HAVE_STPCPY=1;                AC_SUBST([HAVE_STPCPY])
+  HAVE_STPNCPY=1;               AC_SUBST([HAVE_STPNCPY])
+  HAVE_STRCHRNUL=1;             AC_SUBST([HAVE_STRCHRNUL])
+  HAVE_DECL_STRDUP=1;           AC_SUBST([HAVE_DECL_STRDUP])
+  HAVE_DECL_STRNDUP=1;          AC_SUBST([HAVE_DECL_STRNDUP])
+  HAVE_DECL_STRNLEN=1;          AC_SUBST([HAVE_DECL_STRNLEN])
+  HAVE_STRPBRK=1;               AC_SUBST([HAVE_STRPBRK])
+  HAVE_STRSEP=1;                AC_SUBST([HAVE_STRSEP])
+  HAVE_STRCASESTR=1;            AC_SUBST([HAVE_STRCASESTR])
+  HAVE_DECL_STRTOK_R=1;         AC_SUBST([HAVE_DECL_STRTOK_R])
+  HAVE_DECL_STRERROR_R=1;       AC_SUBST([HAVE_DECL_STRERROR_R])
+  HAVE_STRERRORNAME_NP=1;       AC_SUBST([HAVE_STRERRORNAME_NP])
+  HAVE_SIGABBREV_NP=1;          AC_SUBST([HAVE_SIGABBREV_NP])
+  HAVE_SIGDESCR_NP=1;           AC_SUBST([HAVE_SIGDESCR_NP])
+  HAVE_DECL_STRSIGNAL=1;        AC_SUBST([HAVE_DECL_STRSIGNAL])
+  HAVE_STRVERSCMP=1;            AC_SUBST([HAVE_STRVERSCMP])
+  REPLACE_FFSLL=0;              AC_SUBST([REPLACE_FFSLL])
+  REPLACE_MEMCHR=0;             AC_SUBST([REPLACE_MEMCHR])
+  REPLACE_MEMMEM=0;             AC_SUBST([REPLACE_MEMMEM])
+  REPLACE_STPNCPY=0;            AC_SUBST([REPLACE_STPNCPY])
+  REPLACE_STRCHRNUL=0;          AC_SUBST([REPLACE_STRCHRNUL])
+  REPLACE_STRDUP=0;             AC_SUBST([REPLACE_STRDUP])
+  REPLACE_STRNCAT=0;            AC_SUBST([REPLACE_STRNCAT])
+  REPLACE_STRNDUP=0;            AC_SUBST([REPLACE_STRNDUP])
+  REPLACE_STRNLEN=0;            AC_SUBST([REPLACE_STRNLEN])
+  REPLACE_STRSTR=0;             AC_SUBST([REPLACE_STRSTR])
+  REPLACE_STRCASESTR=0;         AC_SUBST([REPLACE_STRCASESTR])
+  REPLACE_STRTOK_R=0;           AC_SUBST([REPLACE_STRTOK_R])
+  REPLACE_STRERROR=0;           AC_SUBST([REPLACE_STRERROR])
+  REPLACE_STRERROR_R=0;         AC_SUBST([REPLACE_STRERROR_R])
+  REPLACE_STRERRORNAME_NP=0;    AC_SUBST([REPLACE_STRERRORNAME_NP])
+  REPLACE_STRSIGNAL=0;          AC_SUBST([REPLACE_STRSIGNAL])
+  UNDEFINE_STRTOK_R=0;          AC_SUBST([UNDEFINE_STRTOK_R])
+])
diff --git a/src/grep/m4/strnlen.m4 b/src/grep/m4/strnlen.m4
new file mode 100644
index 0000000..1d4f106
--- /dev/null
+++ b/src/grep/m4/strnlen.m4
@@ -0,0 +1,30 @@
+# strnlen.m4 serial 14
+dnl Copyright (C) 2002-2003, 2005-2007, 2009-2021 Free Software Foundation,
+dnl Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_STRNLEN],
+[
+  AC_REQUIRE([gl_STRING_H_DEFAULTS])
+
+  dnl Persuade glibc <string.h> to declare strnlen().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_CHECK_DECLS_ONCE([strnlen])
+  if test $ac_cv_have_decl_strnlen = no; then
+    HAVE_DECL_STRNLEN=0
+  else
+    m4_pushdef([AC_LIBOBJ], [:])
+    dnl Note: AC_FUNC_STRNLEN does AC_LIBOBJ([strnlen]).
+    AC_FUNC_STRNLEN
+    m4_popdef([AC_LIBOBJ])
+    if test $ac_cv_func_strnlen_working = no; then
+      REPLACE_STRNLEN=1
+    fi
+  fi
+])
+
+# Prerequisites of lib/strnlen.c.
+AC_DEFUN([gl_PREREQ_STRNLEN], [:])
diff --git a/src/grep/m4/strstr.m4 b/src/grep/m4/strstr.m4
new file mode 100644
index 0000000..a32e9c1
--- /dev/null
+++ b/src/grep/m4/strstr.m4
@@ -0,0 +1,149 @@
+# strstr.m4 serial 24
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Check that strstr works.
+AC_DEFUN([gl_FUNC_STRSTR_SIMPLE],
+[
+  AC_REQUIRE([gl_STRING_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_MEMCHR])
+  if test $REPLACE_MEMCHR = 1; then
+    REPLACE_STRSTR=1
+  else
+    dnl Detect https://sourceware.org/bugzilla/show_bug.cgi?id=12092
+    dnl and https://sourceware.org/bugzilla/show_bug.cgi?id=23637.
+    AC_CACHE_CHECK([whether strstr works],
+      [gl_cv_func_strstr_works_always],
+      [AC_RUN_IFELSE(
+         [AC_LANG_PROGRAM([[
+#include <string.h> /* for __GNU_LIBRARY__, strstr */
+#ifdef __GNU_LIBRARY__
+ #include <features.h>
+ #if __GLIBC__ == 2 && __GLIBC_MINOR__ == 28
+  Unlucky user
+ #endif
+#endif
+#define P "_EF_BF_BD"
+#define HAYSTACK "F_BD_CE_BD" P P P P "_C3_88_20" P P P "_C3_A7_20" P
+#define NEEDLE P P P P P
+]],
+            [[return !!strstr (HAYSTACK, NEEDLE);
+            ]])],
+         [gl_cv_func_strstr_works_always=yes],
+         [gl_cv_func_strstr_works_always=no],
+         [dnl glibc 2.12 and cygwin 1.7.7 have a known bug.  uClibc is not
+          dnl affected, since it uses different source code for strstr than
+          dnl glibc.
+          dnl Assume that it works on all other platforms, even if it is not
+          dnl linear.
+          AC_EGREP_CPP([Lucky user],
+            [
+#include <string.h> /* for __GNU_LIBRARY__ */
+#ifdef __GNU_LIBRARY__
+ #include <features.h>
+ #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ > 12) || (__GLIBC__ > 2)) \
+     || defined __UCLIBC__
+  Lucky user
+ #endif
+#elif defined __CYGWIN__
+ #include <cygwin/version.h>
+ #if CYGWIN_VERSION_DLL_COMBINED > CYGWIN_VERSION_DLL_MAKE_COMBINED (1007, 7)
+  Lucky user
+ #endif
+#else
+  Lucky user
+#endif
+            ],
+            [gl_cv_func_strstr_works_always="guessing yes"],
+            [gl_cv_func_strstr_works_always="$gl_cross_guess_normal"])
+         ])
+      ])
+    case "$gl_cv_func_strstr_works_always" in
+      *yes) ;;
+      *)
+        REPLACE_STRSTR=1
+        ;;
+    esac
+  fi
+]) # gl_FUNC_STRSTR_SIMPLE
+
+dnl Additionally, check that strstr is efficient.
+AC_DEFUN([gl_FUNC_STRSTR],
+[
+  AC_REQUIRE([gl_FUNC_STRSTR_SIMPLE])
+  if test $REPLACE_STRSTR = 0; then
+    AC_CACHE_CHECK([whether strstr works in linear time],
+      [gl_cv_func_strstr_linear],
+      [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+#ifdef __MVS__
+/* z/OS does not deliver signals while strstr() is running (thanks to
+   restrictions on its LE runtime), which prevents us from limiting the
+   running time of this test.  */
+# error "This test does not work properly on z/OS"
+#endif
+#include <signal.h> /* for signal */
+#include <string.h> /* for strstr */
+#include <stdlib.h> /* for malloc */
+#include <unistd.h> /* for alarm */
+static void quit (int sig) { _exit (sig + 128); }
+]], [[
+    int result = 0;
+    size_t m = 1000000;
+    char *haystack = (char *) malloc (2 * m + 2);
+    char *needle = (char *) malloc (m + 2);
+    /* Failure to compile this test due to missing alarm is okay,
+       since all such platforms (mingw) also have quadratic strstr.  */
+    signal (SIGALRM, quit);
+    alarm (5);
+    /* Check for quadratic performance.  */
+    if (haystack && needle)
+      {
+        memset (haystack, 'A', 2 * m);
+        haystack[2 * m] = 'B';
+        haystack[2 * m + 1] = 0;
+        memset (needle, 'A', m);
+        needle[m] = 'B';
+        needle[m + 1] = 0;
+        if (!strstr (haystack, needle))
+          result |= 1;
+      }
+    /* Free allocated memory, in case some sanitizer is watching.  */
+    free (haystack);
+    free (needle);
+    return result;
+    ]])],
+        [gl_cv_func_strstr_linear=yes], [gl_cv_func_strstr_linear=no],
+        [dnl Only glibc > 2.12 on processors without SSE 4.2 instructions and
+         dnl cygwin > 1.7.7 are known to have a bug-free strstr that works in
+         dnl linear time.
+         AC_EGREP_CPP([Lucky user],
+           [
+#include <features.h>
+#ifdef __GNU_LIBRARY__
+ #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ > 12) || (__GLIBC__ > 2)) \
+     && !(defined __i386__ || defined __x86_64__) \
+     && !defined __UCLIBC__
+  Lucky user
+ #endif
+#endif
+#ifdef __CYGWIN__
+ #include <cygwin/version.h>
+ #if CYGWIN_VERSION_DLL_COMBINED > CYGWIN_VERSION_DLL_MAKE_COMBINED (1007, 7)
+  Lucky user
+ #endif
+#endif
+           ],
+           [gl_cv_func_strstr_linear="guessing yes"],
+           [gl_cv_func_strstr_linear="$gl_cross_guess_normal"])
+        ])
+      ])
+    case "$gl_cv_func_strstr_linear" in
+      *yes) ;;
+      *)
+        REPLACE_STRSTR=1
+        ;;
+    esac
+  fi
+]) # gl_FUNC_STRSTR
diff --git a/src/grep/m4/strtoimax.m4 b/src/grep/m4/strtoimax.m4
new file mode 100644
index 0000000..d767d57
--- /dev/null
+++ b/src/grep/m4/strtoimax.m4
@@ -0,0 +1,88 @@
+# strtoimax.m4 serial 16
+dnl Copyright (C) 2002-2004, 2006, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_STRTOIMAX],
+[
+  AC_REQUIRE([gl_INTTYPES_H_DEFAULTS])
+
+  dnl On OSF/1 5.1 with cc, this function is declared but not defined.
+  AC_CHECK_FUNCS_ONCE([strtoimax])
+  AC_CHECK_DECLS_ONCE([strtoimax])
+  if test "$ac_cv_have_decl_strtoimax" != yes; then
+    HAVE_DECL_STRTOIMAX=0
+  fi
+
+  if test "$ac_cv_func_strtoimax" = yes; then
+    HAVE_STRTOIMAX=1
+    dnl On AIX 5.1, strtoimax() fails for values outside the 'int' range.
+    AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+    AC_CACHE_CHECK([whether strtoimax works], [gl_cv_func_strtoimax],
+      [AC_RUN_IFELSE(
+         [AC_LANG_SOURCE([[
+#include <errno.h>
+#include <string.h>
+#include <inttypes.h>
+int main ()
+{
+  if (sizeof (intmax_t) > sizeof (int))
+    {
+      const char *s = "4294967295";
+      char *p;
+      intmax_t res;
+      errno = 0;
+      res = strtoimax (s, &p, 10);
+      if (p != s + strlen (s))
+        return 1;
+      if (errno != 0)
+        return 2;
+      if (res != (intmax_t) 65535 * (intmax_t) 65537)
+        return 3;
+    }
+  else
+    {
+      const char *s = "2147483647";
+      char *p;
+      intmax_t res;
+      errno = 0;
+      res = strtoimax (s, &p, 10);
+      if (p != s + strlen (s))
+        return 1;
+      if (errno != 0)
+        return 2;
+      if (res != 2147483647)
+        return 3;
+    }
+  return 0;
+}
+]])],
+         [gl_cv_func_strtoimax=yes],
+         [gl_cv_func_strtoimax=no],
+         [case "$host_os" in
+                    # Guess no on AIX 5.
+            aix5*)  gl_cv_func_strtoimax="guessing no" ;;
+                    # Guess yes on native Windows.
+            mingw*) gl_cv_func_strtoimax="guessing yes" ;;
+                    # Guess yes otherwise.
+            *)      gl_cv_func_strtoimax="guessing yes" ;;
+          esac
+         ])
+      ])
+    case "$gl_cv_func_strtoimax" in
+      *no) REPLACE_STRTOIMAX=1 ;;
+    esac
+  else
+    if test "$ac_cv_have_decl_strtoimax" = yes; then
+      # HP-UX 11.11 has "#define strtoimax(...) ..." but no function.
+      REPLACE_STRTOIMAX=1
+    fi
+    HAVE_STRTOIMAX=0
+  fi
+])
+
+# Prerequisites of lib/strtoimax.c.
+AC_DEFUN([gl_PREREQ_STRTOIMAX], [
+  AC_CHECK_DECLS([strtoll])
+])
diff --git a/src/grep/m4/strtoll.m4 b/src/grep/m4/strtoll.m4
new file mode 100644
index 0000000..14455dc
--- /dev/null
+++ b/src/grep/m4/strtoll.m4
@@ -0,0 +1,51 @@
+# strtoll.m4 serial 9
+dnl Copyright (C) 2002, 2004, 2006, 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_STRTOLL],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CHECK_FUNCS([strtoll])
+  if test $ac_cv_func_strtoll = yes; then
+    AC_CACHE_CHECK([whether strtoll works],
+      [gl_cv_func_strtoll_works],
+      [AC_RUN_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[#include <stdlib.h>]],
+            [[int result = 0;
+              char *term;
+              /* This test fails on Minix and native Windows.  */
+              {
+                const char input[] = "0x";
+                (void) strtoll (input, &term, 16);
+                if (term != input + 1)
+                  result |= 1;
+              }
+              return result;
+            ]])
+         ],
+         [gl_cv_func_strtoll_works=yes],
+         [gl_cv_func_strtoll_works=no],
+         [case "$host_os" in
+                    # Guess no on native Windows.
+            mingw*) gl_cv_func_strtoll_works="guessing no" ;;
+            *)      gl_cv_func_strtoll_works="$gl_cross_guess_normal" ;;
+          esac
+         ])
+    ])
+    case "$gl_cv_func_strtoll_works" in
+      *yes) ;;
+      *)    REPLACE_STRTOLL=1 ;;
+    esac
+  else
+    HAVE_STRTOLL=0
+  fi
+])
+
+# Prerequisites of lib/strtoll.c.
+AC_DEFUN([gl_PREREQ_STRTOLL], [
+  :
+])
diff --git a/src/grep/m4/strtoull.m4 b/src/grep/m4/strtoull.m4
new file mode 100644
index 0000000..41178cc
--- /dev/null
+++ b/src/grep/m4/strtoull.m4
@@ -0,0 +1,51 @@
+# strtoull.m4 serial 9
+dnl Copyright (C) 2002, 2004, 2006, 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_STRTOULL],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CHECK_FUNCS([strtoull])
+  if test $ac_cv_func_strtoull = yes; then
+    AC_CACHE_CHECK([whether strtoull works],
+      [gl_cv_func_strtoull_works],
+      [AC_RUN_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[#include <stdlib.h>]],
+            [[int result = 0;
+              char *term;
+              /* This test fails on Minix and native Windows.  */
+              {
+                const char input[] = "0x";
+                (void) strtoull (input, &term, 16);
+                if (term != input + 1)
+                  result |= 1;
+              }
+              return result;
+            ]])
+         ],
+         [gl_cv_func_strtoull_works=yes],
+         [gl_cv_func_strtoull_works=no],
+         [case "$host_os" in
+                    # Guess no on native Windows.
+            mingw*) gl_cv_func_strtoull_works="guessing no" ;;
+            *)      gl_cv_func_strtoull_works="$gl_cross_guess_normal" ;;
+          esac
+         ])
+    ])
+    case "$gl_cv_func_strtoull_works" in
+      *yes) ;;
+      *)    REPLACE_STRTOULL=1 ;;
+    esac
+  else
+    HAVE_STRTOULL=0
+  fi
+])
+
+# Prerequisites of lib/strtoull.c.
+AC_DEFUN([gl_PREREQ_STRTOULL], [
+  :
+])
diff --git a/src/grep/m4/strtoumax.m4 b/src/grep/m4/strtoumax.m4
new file mode 100644
index 0000000..b896bf9
--- /dev/null
+++ b/src/grep/m4/strtoumax.m4
@@ -0,0 +1,27 @@
+# strtoumax.m4 serial 13
+dnl Copyright (C) 2002-2004, 2006, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_STRTOUMAX],
+[
+  AC_REQUIRE([gl_INTTYPES_H_DEFAULTS])
+
+  dnl On OSF/1 5.1 with cc, this function is declared but not defined.
+  AC_CHECK_FUNCS_ONCE([strtoumax])
+  AC_CHECK_DECLS_ONCE([strtoumax])
+  if test "$ac_cv_have_decl_strtoumax" = yes; then
+    if test "$ac_cv_func_strtoumax" != yes; then
+      # HP-UX 11.11 has "#define strtoimax(...) ..." but no function.
+      REPLACE_STRTOUMAX=1
+    fi
+  else
+    HAVE_DECL_STRTOUMAX=0
+  fi
+])
+
+# Prerequisites of lib/strtoumax.c.
+AC_DEFUN([gl_PREREQ_STRTOUMAX], [
+  AC_CHECK_DECLS([strtoull])
+])
diff --git a/src/grep/m4/symlink.m4 b/src/grep/m4/symlink.m4
new file mode 100644
index 0000000..209dece
--- /dev/null
+++ b/src/grep/m4/symlink.m4
@@ -0,0 +1,55 @@
+# serial 9
+# See if we need to provide symlink replacement.
+
+dnl Copyright (C) 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# Written by Eric Blake.
+
+AC_DEFUN([gl_FUNC_SYMLINK],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_CHECK_FUNCS_ONCE([symlink])
+  dnl The best we can do on mingw is provide a dummy that always fails, so
+  dnl that compilation can proceed with fewer ifdefs.  On FreeBSD 7.2, AIX 7.1,
+  dnl and Solaris 9, we want to fix a bug with trailing slash handling.
+  if test $ac_cv_func_symlink = no; then
+    HAVE_SYMLINK=0
+  else
+    AC_CACHE_CHECK([whether symlink handles trailing slash correctly],
+      [gl_cv_func_symlink_works],
+      [AC_RUN_IFELSE(
+         [AC_LANG_PROGRAM(
+           [[#include <unistd.h>
+           ]],
+           [[int result = 0;
+             if (!symlink ("a", "conftest.link/"))
+               result |= 1;
+             if (symlink ("conftest.f", "conftest.lnk2"))
+               result |= 2;
+             else if (!symlink ("a", "conftest.lnk2/"))
+               result |= 4;
+             return result;
+           ]])],
+         [gl_cv_func_symlink_works=yes], [gl_cv_func_symlink_works=no],
+         [case "$host_os" in
+                             # Guess yes on Linux systems.
+            linux-* | linux) gl_cv_func_symlink_works="guessing yes" ;;
+                             # Guess yes on glibc systems.
+            *-gnu* | gnu*)   gl_cv_func_symlink_works="guessing yes" ;;
+                             # If we don't know, obey --enable-cross-guesses.
+            *)               gl_cv_func_symlink_works="$gl_cross_guess_normal" ;;
+          esac
+         ])
+      rm -f conftest.f conftest.link conftest.lnk2])
+    case "$gl_cv_func_symlink_works" in
+      *yes) ;;
+      *)
+        REPLACE_SYMLINK=1
+        ;;
+    esac
+  fi
+])
diff --git a/src/grep/m4/sys_ioctl_h.m4 b/src/grep/m4/sys_ioctl_h.m4
new file mode 100644
index 0000000..cd00410
--- /dev/null
+++ b/src/grep/m4/sys_ioctl_h.m4
@@ -0,0 +1,79 @@
+# sys_ioctl_h.m4 serial 15
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Written by Bruno Haible.
+
+AC_DEFUN_ONCE([gl_SYS_IOCTL_H],
+[
+  dnl Ensure to expand the default settings once only, before all statements
+  dnl that occur in other macros.
+  AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])
+
+  AC_CHECK_HEADERS_ONCE([sys/ioctl.h])
+  if test $ac_cv_header_sys_ioctl_h = yes; then
+    HAVE_SYS_IOCTL_H=1
+    dnl Test whether <sys/ioctl.h> declares ioctl(), or whether some other
+    dnl header file, such as <unistd.h> or <stropts.h>, is needed for that.
+    AC_CACHE_CHECK([whether <sys/ioctl.h> declares ioctl],
+      [gl_cv_decl_ioctl_in_sys_ioctl_h],
+      [dnl We cannot use AC_CHECK_DECL because it produces its own messages.
+       AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[#include <sys/ioctl.h>]],
+            [[(void) ioctl;]])],
+         [gl_cv_decl_ioctl_in_sys_ioctl_h=yes],
+         [gl_cv_decl_ioctl_in_sys_ioctl_h=no])
+      ])
+  else
+    HAVE_SYS_IOCTL_H=0
+  fi
+  AC_SUBST([HAVE_SYS_IOCTL_H])
+  dnl <sys/ioctl.h> is always overridden, because of GNULIB_POSIXCHECK.
+  gl_CHECK_NEXT_HEADERS([sys/ioctl.h])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[#include <sys/ioctl.h>
+/* Some platforms declare ioctl in the wrong header.  */
+#if !(defined __GLIBC__ && !defined __UCLIBC__)
+# include <unistd.h>
+#endif
+    ]], [ioctl])
+])
+
+# gl_SYS_IOCTL_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_SYS_IOCTL_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_SYS_IOCTL_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_SYS_IOCTL_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_SYS_IOCTL_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_IOCTL])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_SYS_IOCTL_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_SYS_IOCTL_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  SYS_IOCTL_H_HAVE_WINSOCK2_H=0; AC_SUBST([SYS_IOCTL_H_HAVE_WINSOCK2_H])
+  SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS=0;
+                        AC_SUBST([SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS])
+  REPLACE_IOCTL=0;      AC_SUBST([REPLACE_IOCTL])
+])
diff --git a/src/grep/m4/sys_select_h.m4 b/src/grep/m4/sys_select_h.m4
new file mode 100644
index 0000000..2e7d140
--- /dev/null
+++ b/src/grep/m4/sys_select_h.m4
@@ -0,0 +1,110 @@
+# sys_select_h.m4 serial 23
+dnl Copyright (C) 2006-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN_ONCE([gl_SYS_SELECT_H],
+[
+  AC_REQUIRE([gl_SYS_SELECT_H_DEFAULTS])
+  AC_REQUIRE([AC_C_RESTRICT])
+  AC_CACHE_CHECK([whether <sys/select.h> is self-contained],
+    [gl_cv_header_sys_select_h_selfcontained],
+    [
+      dnl Test against two bugs:
+      dnl 1. On many platforms, <sys/select.h> assumes prior inclusion of
+      dnl    <sys/types.h>.
+      dnl 2. On OSF/1 4.0, <sys/select.h> provides only a forward declaration
+      dnl    of 'struct timeval', and no definition of this type.
+      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/select.h>]],
+                                         [[struct timeval b;]])],
+        [gl_cv_header_sys_select_h_selfcontained=yes],
+        [gl_cv_header_sys_select_h_selfcontained=no])
+      dnl Test against another bug:
+      dnl 3. On Solaris 10, <sys/select.h> provides an FD_ZERO implementation
+      dnl    that relies on memset(), but without including <string.h>.
+      if test $gl_cv_header_sys_select_h_selfcontained = yes; then
+        AC_COMPILE_IFELSE(
+          [AC_LANG_PROGRAM([[#include <sys/select.h>]],
+                           [[int memset; int bzero;]])
+          ],
+          [AC_LINK_IFELSE(
+             [AC_LANG_PROGRAM([[#include <sys/select.h>]], [[
+                  #undef memset
+                  #define memset nonexistent_memset
+                  extern
+                  #ifdef __cplusplus
+                  "C"
+                  #endif
+                  void *memset (void *, int, unsigned long);
+                  #undef bzero
+                  #define bzero nonexistent_bzero
+                  extern
+                  #ifdef __cplusplus
+                  "C"
+                  #endif
+                  void bzero (void *, unsigned long);
+                  fd_set fds;
+                  FD_ZERO (&fds);
+                ]])
+             ],
+             [],
+             [gl_cv_header_sys_select_h_selfcontained=no])
+          ])
+      fi
+    ])
+  dnl <sys/select.h> is always overridden, because of GNULIB_POSIXCHECK.
+  gl_CHECK_NEXT_HEADERS([sys/select.h])
+  if test $ac_cv_header_sys_select_h = yes; then
+    HAVE_SYS_SELECT_H=1
+  else
+    HAVE_SYS_SELECT_H=0
+  fi
+  AC_SUBST([HAVE_SYS_SELECT_H])
+  gl_PREREQ_SYS_H_WINSOCK2
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[
+/* Some systems require prerequisite headers.  */
+#include <sys/types.h>
+#if !(defined __GLIBC__ && !defined __UCLIBC__) && HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+#include <sys/select.h>
+    ]], [pselect select])
+])
+
+# gl_SYS_SELECT_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_SYS_SELECT_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_SYS_SELECT_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_SYS_SELECT_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_SYS_SELECT_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PSELECT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SELECT])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_SYS_SELECT_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_SYS_SELECT_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_SYS_SELECT_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_PSELECT=1; AC_SUBST([HAVE_PSELECT])
+  REPLACE_PSELECT=0; AC_SUBST([REPLACE_PSELECT])
+  REPLACE_SELECT=0; AC_SUBST([REPLACE_SELECT])
+])
diff --git a/src/grep/m4/sys_socket_h.m4 b/src/grep/m4/sys_socket_h.m4
new file mode 100644
index 0000000..5676a0d
--- /dev/null
+++ b/src/grep/m4/sys_socket_h.m4
@@ -0,0 +1,205 @@
+# sys_socket_h.m4 serial 28
+dnl Copyright (C) 2005-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Simon Josefsson.
+
+AC_DEFUN_ONCE([gl_SYS_SOCKET_H],
+[
+  AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+
+  dnl On OSF/1, the functions recv(), send(), recvfrom(), sendto() have
+  dnl old-style declarations (with return type 'int' instead of 'ssize_t')
+  dnl unless _POSIX_PII_SOCKET is defined.
+  case "$host_os" in
+    osf*)
+      AC_DEFINE([_POSIX_PII_SOCKET], [1],
+        [Define to 1 in order to get the POSIX compatible declarations
+         of socket functions.])
+      ;;
+  esac
+
+  AC_CACHE_CHECK([whether <sys/socket.h> is self-contained],
+    [gl_cv_header_sys_socket_h_selfcontained],
+    [
+      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]], [[]])],
+        [gl_cv_header_sys_socket_h_selfcontained=yes],
+        [gl_cv_header_sys_socket_h_selfcontained=no])
+    ])
+  if test $gl_cv_header_sys_socket_h_selfcontained = yes; then
+    dnl If the shutdown function exists, <sys/socket.h> should define
+    dnl SHUT_RD, SHUT_WR, SHUT_RDWR.
+    AC_CHECK_FUNCS([shutdown])
+    if test $ac_cv_func_shutdown = yes; then
+      AC_CACHE_CHECK([whether <sys/socket.h> defines the SHUT_* macros],
+        [gl_cv_header_sys_socket_h_shut],
+        [
+          AC_COMPILE_IFELSE(
+            [AC_LANG_PROGRAM([[#include <sys/socket.h>]],
+               [[int a[] = { SHUT_RD, SHUT_WR, SHUT_RDWR };]])],
+            [gl_cv_header_sys_socket_h_shut=yes],
+            [gl_cv_header_sys_socket_h_shut=no])
+        ])
+      if test $gl_cv_header_sys_socket_h_shut = no; then
+        SYS_SOCKET_H='sys/socket.h'
+      fi
+    fi
+  fi
+  # We need to check for ws2tcpip.h now.
+  gl_PREREQ_SYS_H_SOCKET
+  AC_CHECK_TYPES([struct sockaddr_storage, sa_family_t],,,[
+  /* sys/types.h is not needed according to POSIX, but the
+     sys/socket.h in i386-unknown-freebsd4.10 and
+     powerpc-apple-darwin5.5 required it. */
+#include <sys/types.h>
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_WS2TCPIP_H
+#include <ws2tcpip.h>
+#endif
+])
+  if test $ac_cv_type_struct_sockaddr_storage = no; then
+    HAVE_STRUCT_SOCKADDR_STORAGE=0
+  fi
+  if test $ac_cv_type_sa_family_t = no; then
+    HAVE_SA_FAMILY_T=0
+  fi
+  if test $ac_cv_type_struct_sockaddr_storage != no; then
+    AC_CHECK_MEMBERS([struct sockaddr_storage.ss_family],
+      [],
+      [HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=0],
+      [#include <sys/types.h>
+       #ifdef HAVE_SYS_SOCKET_H
+       #include <sys/socket.h>
+       #endif
+       #ifdef HAVE_WS2TCPIP_H
+       #include <ws2tcpip.h>
+       #endif
+      ])
+  fi
+  if test $HAVE_STRUCT_SOCKADDR_STORAGE = 0 || test $HAVE_SA_FAMILY_T = 0 \
+     || test $HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY = 0; then
+    SYS_SOCKET_H='sys/socket.h'
+  fi
+  gl_PREREQ_SYS_H_WINSOCK2
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[
+/* Some systems require prerequisite headers.  */
+#include <sys/types.h>
+#include <sys/socket.h>
+    ]], [socket connect accept bind getpeername getsockname getsockopt
+    listen recv send recvfrom sendto setsockopt shutdown accept4])
+
+  AC_REQUIRE([AC_C_RESTRICT])
+])
+
+AC_DEFUN([gl_PREREQ_SYS_H_SOCKET],
+[
+  dnl Check prerequisites of the <sys/socket.h> replacement.
+  AC_REQUIRE([gl_CHECK_SOCKET_HEADERS])
+  gl_CHECK_NEXT_HEADERS([sys/socket.h])
+  if test $ac_cv_header_sys_socket_h = yes; then
+    HAVE_SYS_SOCKET_H=1
+  else
+    HAVE_SYS_SOCKET_H=0
+  fi
+  AC_SUBST([HAVE_SYS_SOCKET_H])
+  gl_PREREQ_SYS_H_WS2TCPIP
+])
+
+# Common prerequisites of the <sys/socket.h> replacement and of the
+# <sys/select.h> replacement.
+# Sets and substitutes HAVE_WINSOCK2_H.
+AC_DEFUN([gl_PREREQ_SYS_H_WINSOCK2],
+[
+  m4_ifdef([gl_UNISTD_H_DEFAULTS], [AC_REQUIRE([gl_UNISTD_H_DEFAULTS])])
+  m4_ifdef([gl_SYS_IOCTL_H_DEFAULTS], [AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])])
+  AC_CHECK_HEADERS_ONCE([sys/socket.h])
+  if test $ac_cv_header_sys_socket_h != yes; then
+    dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
+    dnl the check for those headers unconditional; yet cygwin reports
+    dnl that the headers are present but cannot be compiled (since on
+    dnl cygwin, all socket information should come from sys/socket.h).
+    AC_CHECK_HEADERS([winsock2.h])
+  fi
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    HAVE_WINSOCK2_H=1
+    UNISTD_H_HAVE_WINSOCK2_H=1
+    SYS_IOCTL_H_HAVE_WINSOCK2_H=1
+  else
+    HAVE_WINSOCK2_H=0
+  fi
+  AC_SUBST([HAVE_WINSOCK2_H])
+])
+
+# Common prerequisites of the <sys/socket.h> replacement and of the
+# <arpa/inet.h> replacement.
+# Sets and substitutes HAVE_WS2TCPIP_H.
+AC_DEFUN([gl_PREREQ_SYS_H_WS2TCPIP],
+[
+  AC_REQUIRE([gl_CHECK_SOCKET_HEADERS])
+  if test $ac_cv_header_sys_socket_h = yes; then
+    HAVE_WS2TCPIP_H=0
+  else
+    if test $ac_cv_header_ws2tcpip_h = yes; then
+      HAVE_WS2TCPIP_H=1
+    else
+      HAVE_WS2TCPIP_H=0
+    fi
+  fi
+  AC_SUBST([HAVE_WS2TCPIP_H])
+])
+
+# gl_SYS_SOCKET_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_SYS_SOCKET_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_SYS_SOCKET_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_SYS_SOCKET_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_SYS_SOCKET_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SOCKET])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_CONNECT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ACCEPT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_BIND])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETPEERNAME])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETSOCKNAME])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETSOCKOPT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LISTEN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_RECV])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SEND])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_RECVFROM])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SENDTO])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SETSOCKOPT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SHUTDOWN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ACCEPT4])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_SYS_SOCKET_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_SYS_SOCKET_H_DEFAULTS],
+[
+  HAVE_STRUCT_SOCKADDR_STORAGE=1; AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE])
+  HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=1;
+                        AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY])
+  HAVE_SA_FAMILY_T=1;   AC_SUBST([HAVE_SA_FAMILY_T])
+  HAVE_ACCEPT4=1;       AC_SUBST([HAVE_ACCEPT4])
+])
diff --git a/src/grep/m4/sys_stat_h.m4 b/src/grep/m4/sys_stat_h.m4
new file mode 100644
index 0000000..ac91d42
--- /dev/null
+++ b/src/grep/m4/sys_stat_h.m4
@@ -0,0 +1,127 @@
+# sys_stat_h.m4 serial 41   -*- Autoconf -*-
+dnl Copyright (C) 2006-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Eric Blake.
+dnl Provide a GNU-like <sys/stat.h>.
+
+AC_DEFUN_ONCE([gl_SYS_STAT_H],
+[
+  AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
+
+  dnl Check for broken stat macros.
+  AC_REQUIRE([AC_HEADER_STAT])
+
+  gl_CHECK_NEXT_HEADERS([sys/stat.h])
+
+  dnl Ensure the type mode_t gets defined.
+  AC_REQUIRE([AC_TYPE_MODE_T])
+
+  dnl Whether to enable precise timestamps in 'struct stat'.
+  m4_ifdef([gl_WINDOWS_STAT_TIMESPEC], [
+    AC_REQUIRE([gl_WINDOWS_STAT_TIMESPEC])
+  ], [
+    WINDOWS_STAT_TIMESPEC=0
+  ])
+  AC_SUBST([WINDOWS_STAT_TIMESPEC])
+
+  dnl Whether to ensure that struct stat.st_size is 64-bit wide.
+  m4_ifdef([gl_LARGEFILE], [
+    AC_REQUIRE([gl_LARGEFILE])
+  ], [
+    WINDOWS_64_BIT_ST_SIZE=0
+  ])
+  AC_SUBST([WINDOWS_64_BIT_ST_SIZE])
+
+  dnl Define types that are supposed to be defined in <sys/types.h> or
+  dnl <sys/stat.h>.
+  AC_CHECK_TYPE([nlink_t], [],
+    [AC_DEFINE([nlink_t], [int],
+       [Define to the type of st_nlink in struct stat, or a supertype.])],
+    [#include <sys/types.h>
+     #include <sys/stat.h>])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[#include <sys/stat.h>
+    ]], [fchmodat fstat fstatat futimens getumask lchmod lstat
+    mkdirat mkfifo mkfifoat mknod mknodat stat utimensat])
+
+  AC_REQUIRE([AC_C_RESTRICT])
+])
+
+# gl_SYS_STAT_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_SYS_STAT_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_SYS_STAT_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_SYS_STAT_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_SYS_STAT_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_UNISTD_H_REQUIRE_DEFAULTS dnl for REPLACE_FCHDIR
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FCHMODAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FSTAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FSTATAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FUTIMENS])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETUMASK])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LCHMOD])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LSTAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKDIR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKDIRAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKFIFO])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKFIFOAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKNOD])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKNODAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_UTIMENSAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_OVERRIDES_STRUCT_STAT])
+    dnl Support Microsoft deprecated alias function names by default.
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_CHMOD], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_MKDIR], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_UMASK], [1])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_SYS_STAT_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_SYS_STAT_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_FCHMODAT=1;      AC_SUBST([HAVE_FCHMODAT])
+  HAVE_FSTATAT=1;       AC_SUBST([HAVE_FSTATAT])
+  HAVE_FUTIMENS=1;      AC_SUBST([HAVE_FUTIMENS])
+  HAVE_GETUMASK=1;      AC_SUBST([HAVE_GETUMASK])
+  HAVE_LCHMOD=1;        AC_SUBST([HAVE_LCHMOD])
+  HAVE_LSTAT=1;         AC_SUBST([HAVE_LSTAT])
+  HAVE_MKDIRAT=1;       AC_SUBST([HAVE_MKDIRAT])
+  HAVE_MKFIFO=1;        AC_SUBST([HAVE_MKFIFO])
+  HAVE_MKFIFOAT=1;      AC_SUBST([HAVE_MKFIFOAT])
+  HAVE_MKNOD=1;         AC_SUBST([HAVE_MKNOD])
+  HAVE_MKNODAT=1;       AC_SUBST([HAVE_MKNODAT])
+  HAVE_UTIMENSAT=1;     AC_SUBST([HAVE_UTIMENSAT])
+  REPLACE_FCHMODAT=0;   AC_SUBST([REPLACE_FCHMODAT])
+  REPLACE_FSTAT=0;      AC_SUBST([REPLACE_FSTAT])
+  REPLACE_FSTATAT=0;    AC_SUBST([REPLACE_FSTATAT])
+  REPLACE_FUTIMENS=0;   AC_SUBST([REPLACE_FUTIMENS])
+  REPLACE_LSTAT=0;      AC_SUBST([REPLACE_LSTAT])
+  REPLACE_MKDIR=0;      AC_SUBST([REPLACE_MKDIR])
+  REPLACE_MKFIFO=0;     AC_SUBST([REPLACE_MKFIFO])
+  REPLACE_MKFIFOAT=0;   AC_SUBST([REPLACE_MKFIFOAT])
+  REPLACE_MKNOD=0;      AC_SUBST([REPLACE_MKNOD])
+  REPLACE_MKNODAT=0;    AC_SUBST([REPLACE_MKNODAT])
+  REPLACE_STAT=0;       AC_SUBST([REPLACE_STAT])
+  REPLACE_UTIMENSAT=0;  AC_SUBST([REPLACE_UTIMENSAT])
+])
diff --git a/src/grep/m4/sys_time_h.m4 b/src/grep/m4/sys_time_h.m4
new file mode 100644
index 0000000..c425a96
--- /dev/null
+++ b/src/grep/m4/sys_time_h.m4
@@ -0,0 +1,120 @@
+# Configure a replacement for <sys/time.h>.
+# serial 12
+
+# Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# Written by Paul Eggert and Martin Lambers.
+
+AC_DEFUN_ONCE([gl_SYS_TIME_H],
+[
+  dnl Use AC_REQUIRE here, so that the REPLACE_GETTIMEOFDAY=0 statement
+  dnl below is expanded once only, before all REPLACE_GETTIMEOFDAY=1
+  dnl statements that occur in other macros.
+  AC_REQUIRE([gl_SYS_TIME_H_DEFAULTS])
+  AC_REQUIRE([AC_C_RESTRICT])
+  AC_CHECK_HEADERS_ONCE([sys/time.h])
+  gl_CHECK_NEXT_HEADERS([sys/time.h])
+
+  if test $ac_cv_header_sys_time_h != yes; then
+    HAVE_SYS_TIME_H=0
+  fi
+
+  dnl On native Windows with MSVC, 'struct timeval' is defined in <winsock2.h>
+  dnl only. So include that header in the list.
+  gl_PREREQ_SYS_H_WINSOCK2
+  AC_CACHE_CHECK([for struct timeval], [gl_cv_sys_struct_timeval],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#if HAVE_SYS_TIME_H
+             #include <sys/time.h>
+            #endif
+            #include <time.h>
+            #if HAVE_WINSOCK2_H
+            # include <winsock2.h>
+            #endif
+          ]],
+          [[static struct timeval x; x.tv_sec = x.tv_usec;]])],
+       [gl_cv_sys_struct_timeval=yes],
+       [gl_cv_sys_struct_timeval=no])
+    ])
+  if test $gl_cv_sys_struct_timeval != yes; then
+    HAVE_STRUCT_TIMEVAL=0
+  else
+    dnl On native Windows with a 64-bit 'time_t', 'struct timeval' is defined
+    dnl (in <sys/time.h> and <winsock2.h> for mingw64, in <winsock2.h> only
+    dnl for MSVC) with a tv_sec field of type 'long' (32-bit!), which is
+    dnl smaller than the 'time_t' type mandated by POSIX.
+    dnl On OpenBSD 5.1 amd64, tv_sec is 64 bits and time_t 32 bits, but
+    dnl that is good enough.
+    AC_CACHE_CHECK([for wide-enough struct timeval.tv_sec member],
+      [gl_cv_sys_struct_timeval_tv_sec],
+      [AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[#if HAVE_SYS_TIME_H
+               #include <sys/time.h>
+              #endif
+              #include <time.h>
+              #if HAVE_WINSOCK2_H
+              # include <winsock2.h>
+              #endif
+            ]],
+            [[static struct timeval x;
+              typedef int verify_tv_sec_type[
+                sizeof (time_t) <= sizeof x.tv_sec ? 1 : -1
+              ];
+            ]])],
+         [gl_cv_sys_struct_timeval_tv_sec=yes],
+         [gl_cv_sys_struct_timeval_tv_sec=no])
+      ])
+    if test $gl_cv_sys_struct_timeval_tv_sec != yes; then
+      REPLACE_STRUCT_TIMEVAL=1
+    fi
+  fi
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[
+#if HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+#include <time.h>
+    ]], [gettimeofday])
+])
+
+# gl_SYS_TIME_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_SYS_TIME_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_SYS_TIME_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_SYS_TIME_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_SYS_TIME_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETTIMEOFDAY])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_SYS_TIME_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_SYS_TIME_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_SYS_TIME_H_DEFAULTS],
+[
+  dnl Assume POSIX behavior unless another module says otherwise.
+  HAVE_GETTIMEOFDAY=1;       AC_SUBST([HAVE_GETTIMEOFDAY])
+  HAVE_STRUCT_TIMEVAL=1;     AC_SUBST([HAVE_STRUCT_TIMEVAL])
+  HAVE_SYS_TIME_H=1;         AC_SUBST([HAVE_SYS_TIME_H])
+  REPLACE_GETTIMEOFDAY=0;    AC_SUBST([REPLACE_GETTIMEOFDAY])
+  REPLACE_STRUCT_TIMEVAL=0;  AC_SUBST([REPLACE_STRUCT_TIMEVAL])
+])
diff --git a/src/grep/m4/sys_types_h.m4 b/src/grep/m4/sys_types_h.m4
new file mode 100644
index 0000000..6dd6fee
--- /dev/null
+++ b/src/grep/m4/sys_types_h.m4
@@ -0,0 +1,70 @@
+# sys_types_h.m4 serial 13
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN_ONCE([gl_SYS_TYPES_H],
+[
+  AC_REQUIRE([gl_SYS_TYPES_H_DEFAULTS])
+
+  dnl Use sane struct stat types in OpenVMS 8.2 and later.
+  AC_DEFINE([_USE_STD_STAT], 1, [For standard stat data types on VMS.])
+
+  gl_NEXT_HEADERS([sys/types.h])
+
+  dnl Ensure the type pid_t gets defined.
+  AC_REQUIRE([AC_TYPE_PID_T])
+
+  dnl Ensure the type mode_t gets defined.
+  AC_REQUIRE([AC_TYPE_MODE_T])
+
+  dnl Whether to override the 'off_t' type.
+  AC_REQUIRE([gl_TYPE_OFF_T])
+
+  dnl Whether to override the 'dev_t' and 'ino_t' types.
+  m4_ifdef([gl_WINDOWS_STAT_INODES], [
+    AC_REQUIRE([gl_WINDOWS_STAT_INODES])
+  ], [
+    WINDOWS_STAT_INODES=0
+  ])
+  AC_SUBST([WINDOWS_STAT_INODES])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_SYS_TYPES_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_SYS_TYPE_H_MODULE_INDICATOR_DEFAULTS], [
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_SYS_TYPE_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_SYS_TYPES_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_SYS_TYPES_H_DEFAULTS],
+[
+])
+
+# This works around a buggy version in autoconf <= 2.69.
+# See <https://lists.gnu.org/r/autoconf/2016-08/msg00014.html>
+# The 2.70 version isn't quoted properly, so override it too.
+
+m4_version_prereq([2.70.1], [], [
+
+m4_undefine([AC_HEADER_MAJOR])
+AC_DEFUN([AC_HEADER_MAJOR],
+[AC_CHECK_HEADERS_ONCE([sys/types.h])
+AC_CHECK_HEADER([sys/mkdev.h],
+                [AC_DEFINE([MAJOR_IN_MKDEV], [1],
+                           [Define to 1 if `major', `minor', and `makedev' are
+                            declared in <mkdev.h>.])])
+if test $ac_cv_header_sys_mkdev_h = no; then
+  AC_CHECK_HEADER([sys/sysmacros.h],
+                  [AC_DEFINE([MAJOR_IN_SYSMACROS], [1],
+                             [Define to 1 if `major', `minor', and `makedev'
+                              are declared in <sysmacros.h>.])])
+fi
+])# AC_HEADER_MAJOR
+
+])
diff --git a/src/grep/m4/sys_uio_h.m4 b/src/grep/m4/sys_uio_h.m4
new file mode 100644
index 0000000..fa176e0
--- /dev/null
+++ b/src/grep/m4/sys_uio_h.m4
@@ -0,0 +1,46 @@
+# sys_uio_h.m4 serial 3
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN_ONCE([gl_SYS_UIO_H],
+[
+  AC_REQUIRE([gl_SYS_UIO_H_DEFAULTS])
+  dnl <sys/uio.h> is always overridden, because of GNULIB_POSIXCHECK.
+  gl_CHECK_NEXT_HEADERS([sys/uio.h])
+  if test $ac_cv_header_sys_uio_h = yes; then
+    HAVE_SYS_UIO_H=1
+  else
+    HAVE_SYS_UIO_H=0
+  fi
+  AC_SUBST([HAVE_SYS_UIO_H])
+])
+
+# gl_SYS_UIO_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_SYS_UIO_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_SYS_UIO_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_SYS_UIO_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_SYS_UIO_H_MODULE_INDICATOR_DEFAULTS], [
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_SYS_UIO_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_SYS_UIO_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_SYS_UIO_H_DEFAULTS],
+[
+])
diff --git a/src/grep/m4/thread.m4 b/src/grep/m4/thread.m4
new file mode 100644
index 0000000..8ec9cc3
--- /dev/null
+++ b/src/grep/m4/thread.m4
@@ -0,0 +1,17 @@
+# thread.m4 serial 3
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_THREAD],
+[
+  AC_REQUIRE([gl_THREADLIB])
+
+  if test $gl_threads_api = posix; then
+    gl_save_LIBS="$LIBS"
+    LIBS="$LIBS $LIBMULTITHREAD"
+    AC_CHECK_FUNCS([pthread_atfork])
+    LIBS="$gl_save_LIBS"
+  fi
+])
diff --git a/src/grep/m4/threadlib.m4 b/src/grep/m4/threadlib.m4
new file mode 100644
index 0000000..37b797c
--- /dev/null
+++ b/src/grep/m4/threadlib.m4
@@ -0,0 +1,654 @@
+# threadlib.m4 serial 31
+dnl Copyright (C) 2005-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+
+AC_PREREQ([2.60])
+
+dnl The general structure of the multithreading modules in gnulib is that we
+dnl have three set of modules:
+dnl
+dnl   * POSIX API:
+dnl     pthread, which combines
+dnl       pthread-h
+dnl       pthread-thread
+dnl       pthread-once
+dnl       pthread-mutex
+dnl       pthread-rwlock
+dnl       pthread-cond
+dnl       pthread-tss
+dnl       pthread-spin
+dnl     sched_yield
+dnl
+dnl   * ISO C API:
+dnl     threads, which combines
+dnl       threads-h
+dnl       thrd
+dnl       mtx
+dnl       cnd
+dnl       tss
+dnl
+dnl   * Gnulib API, with an implementation that can be chosen at configure
+dnl     time through the option --enable-threads=...
+dnl       thread
+dnl       lock
+dnl       cond
+dnl       tls
+dnl       yield
+dnl
+dnl They are independent, except for the fact that
+dnl   - the implementation of the ISO C API may use the POSIX (or some other
+dnl     platform dependent) API,
+dnl   - the implementation of the Gnulib API may use the POSIX or ISO C or
+dnl     some other platform dependent API, depending on the --enable-threads
+dnl     option.
+dnl
+dnl This file contains macros for all of these APIs!
+
+dnl ============================================================================
+dnl Macros for all thread APIs
+
+AC_DEFUN([gl_ANYTHREADLIB_EARLY],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  if test -z "$gl_anythreadlib_early_done"; then
+    case "$host_os" in
+      osf*)
+        # On OSF/1, the compiler needs the flag -D_REENTRANT so that it
+        # groks <pthread.h>. cc also understands the flag -pthread, but
+        # we don't use it because 1. gcc-2.95 doesn't understand -pthread,
+        # 2. putting a flag into CPPFLAGS that has an effect on the linker
+        # causes the AC_LINK_IFELSE test below to succeed unexpectedly,
+        # leading to wrong values of LIBTHREAD and LTLIBTHREAD.
+        CPPFLAGS="$CPPFLAGS -D_REENTRANT"
+        ;;
+    esac
+    # Some systems optimize for single-threaded programs by default, and
+    # need special flags to disable these optimizations. For example, the
+    # definition of 'errno' in <errno.h>.
+    case "$host_os" in
+      aix* | freebsd*) CPPFLAGS="$CPPFLAGS -D_THREAD_SAFE" ;;
+      solaris*) CPPFLAGS="$CPPFLAGS -D_REENTRANT" ;;
+    esac
+    gl_anythreadlib_early_done=done
+  fi
+])
+
+dnl Checks whether the compiler and linker support weak declarations of symbols.
+
+AC_DEFUN([gl_WEAK_SYMBOLS],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CACHE_CHECK([whether imported symbols can be declared weak],
+    [gl_cv_have_weak],
+    [gl_cv_have_weak=no
+     dnl First, test whether the compiler accepts it syntactically.
+     AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[extern void xyzzy ();
+#pragma weak xyzzy]],
+          [[xyzzy();]])],
+       [gl_cv_have_weak=maybe])
+     if test $gl_cv_have_weak = maybe; then
+       dnl Second, test whether it actually works. On Cygwin 1.7.2, with
+       dnl gcc 4.3, symbols declared weak always evaluate to the address 0.
+       AC_RUN_IFELSE(
+         [AC_LANG_SOURCE([[
+#include <stdio.h>
+#pragma weak fputs
+int main ()
+{
+  return (fputs == NULL);
+}]])],
+         [gl_cv_have_weak=yes],
+         [gl_cv_have_weak=no],
+         [dnl When cross-compiling, assume that only ELF platforms support
+          dnl weak symbols.
+          AC_EGREP_CPP([Extensible Linking Format],
+            [#ifdef __ELF__
+             Extensible Linking Format
+             #endif
+            ],
+            [gl_cv_have_weak="guessing yes"],
+            [gl_cv_have_weak="guessing no"])
+         ])
+     fi
+     dnl But when linking statically, weak symbols don't work.
+     case " $LDFLAGS " in
+       *" -static "*) gl_cv_have_weak=no ;;
+     esac
+     dnl Test for a bug in FreeBSD 11: A link error occurs when using a weak
+     dnl symbol and linking against a shared library that has a dependency on
+     dnl the shared library that defines the symbol.
+     case "$gl_cv_have_weak" in
+       *yes)
+         case "$host_os" in
+           freebsd* | dragonfly* | midnightbsd*)
+             : > conftest1.c
+             $CC $CPPFLAGS $CFLAGS $LDFLAGS -fPIC -shared -o libempty.so conftest1.c -lpthread >&AS_MESSAGE_LOG_FD 2>&1
+             cat <<EOF > conftest2.c
+#include <pthread.h>
+#pragma weak pthread_mutexattr_gettype
+int main ()
+{
+  return (pthread_mutexattr_gettype != NULL);
+}
+EOF
+             $CC $CPPFLAGS $CFLAGS $LDFLAGS -o conftest conftest2.c libempty.so >&AS_MESSAGE_LOG_FD 2>&1 \
+               || gl_cv_have_weak=no
+             rm -f conftest1.c libempty.so conftest2.c conftest
+             ;;
+         esac
+         ;;
+     esac
+    ])
+  case "$gl_cv_have_weak" in
+    *yes)
+      AC_DEFINE([HAVE_WEAK_SYMBOLS], [1],
+        [Define to 1 if the compiler and linker support weak declarations of symbols.])
+      ;;
+  esac
+])
+
+dnl ============================================================================
+dnl Macros for the POSIX API
+
+dnl gl_PTHREADLIB
+dnl -------------
+dnl Tests for the libraries needs for using the POSIX threads API.
+dnl Sets the variable LIBPTHREAD to the linker options for use in a Makefile.
+dnl Sets the variable LIBPMULTITHREAD, for programs that really need
+dnl multithread functionality. The difference between LIBPTHREAD and
+dnl LIBPMULTITHREAD is that on platforms supporting weak symbols, typically
+dnl LIBPTHREAD is empty whereas LIBPMULTITHREAD is not.
+dnl Sets the variable LIB_SCHED_YIELD to the linker options needed to use the
+dnl sched_yield() function.
+dnl Adds to CPPFLAGS the flag -D_REENTRANT or -D_THREAD_SAFE if needed for
+dnl multithread-safe programs.
+dnl Defines the C macro HAVE_PTHREAD_API if (at least parts of) the POSIX
+dnl threads API is available.
+
+dnl The guts of gl_PTHREADLIB. Needs to be expanded only once.
+
+AC_DEFUN([gl_PTHREADLIB_BODY],
+[
+  AC_REQUIRE([gl_ANYTHREADLIB_EARLY])
+  if test -z "$gl_pthreadlib_body_done"; then
+    gl_pthread_api=no
+    LIBPTHREAD=
+    LIBPMULTITHREAD=
+    # On OSF/1, the compiler needs the flag -pthread or -D_REENTRANT so that
+    # it groks <pthread.h>. It's added above, in gl_ANYTHREADLIB_EARLY.
+    AC_CHECK_HEADER([pthread.h],
+      [gl_have_pthread_h=yes], [gl_have_pthread_h=no])
+    if test "$gl_have_pthread_h" = yes; then
+      # Other possible tests:
+      #   -lpthreads (FSU threads, PCthreads)
+      #   -lgthreads
+      # Test whether both pthread_mutex_lock and pthread_mutexattr_init exist
+      # in libc. IRIX 6.5 has the first one in both libc and libpthread, but
+      # the second one only in libpthread, and lock.c needs it.
+      #
+      # If -pthread works, prefer it to -lpthread, since Ubuntu 14.04
+      # needs -pthread for some reason.  See:
+      # https://lists.gnu.org/r/bug-gnulib/2014-09/msg00023.html
+      save_LIBS=$LIBS
+      for gl_pthread in '' '-pthread'; do
+        LIBS="$LIBS $gl_pthread"
+        AC_LINK_IFELSE(
+          [AC_LANG_PROGRAM(
+             [[#include <pthread.h>
+               pthread_mutex_t m;
+               pthread_mutexattr_t ma;
+             ]],
+             [[pthread_mutex_lock (&m);
+               pthread_mutexattr_init (&ma);]])],
+          [gl_pthread_api=yes
+           LIBPTHREAD=$gl_pthread
+           LIBPMULTITHREAD=$gl_pthread])
+        LIBS=$save_LIBS
+        test $gl_pthread_api = yes && break
+      done
+      echo "$as_me:__oline__: gl_pthread_api=$gl_pthread_api" >&AS_MESSAGE_LOG_FD
+      echo "$as_me:__oline__: LIBPTHREAD=$LIBPTHREAD" >&AS_MESSAGE_LOG_FD
+
+      gl_pthread_in_glibc=no
+      # On Linux with glibc >= 2.34, libc contains the fully functional
+      # pthread functions.
+      case "$host_os" in
+        linux*)
+          AC_EGREP_CPP([Lucky user],
+            [#include <features.h>
+             #ifdef __GNU_LIBRARY__
+              #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 34) || (__GLIBC__ > 2)
+               Lucky user
+              #endif
+             #endif
+            ],
+            [gl_pthread_in_glibc=yes],
+            [])
+          ;;
+      esac
+      echo "$as_me:__oline__: gl_pthread_in_glibc=$gl_pthread_in_glibc" >&AS_MESSAGE_LOG_FD
+
+      # Test for libpthread by looking for pthread_kill. (Not pthread_self,
+      # since it is defined as a macro on OSF/1.)
+      if test $gl_pthread_api = yes && test -z "$LIBPTHREAD"; then
+        # The program links fine without libpthread. But it may actually
+        # need to link with libpthread in order to create multiple threads.
+        AC_CHECK_LIB([pthread], [pthread_kill],
+          [if test $gl_pthread_in_glibc = yes; then
+             LIBPMULTITHREAD=
+           else
+             LIBPMULTITHREAD=-lpthread
+             # On Solaris and HP-UX, most pthread functions exist also in libc.
+             # Therefore pthread_in_use() needs to actually try to create a
+             # thread: pthread_create from libc will fail, whereas
+             # pthread_create will actually create a thread.
+             # On Solaris 10 or newer, this test is no longer needed, because
+             # libc contains the fully functional pthread functions.
+             case "$host_os" in
+               solaris | solaris2.[1-9] | solaris2.[1-9].* | hpux*)
+                 AC_DEFINE([PTHREAD_IN_USE_DETECTION_HARD], [1],
+                   [Define if the pthread_in_use() detection is hard.])
+             esac
+           fi
+          ])
+      elif test $gl_pthread_api != yes; then
+        # Some library is needed. Try libpthread and libc_r.
+        AC_CHECK_LIB([pthread], [pthread_kill],
+          [gl_pthread_api=yes
+           LIBPTHREAD=-lpthread
+           LIBPMULTITHREAD=-lpthread])
+        if test $gl_pthread_api != yes; then
+          # For FreeBSD 4.
+          AC_CHECK_LIB([c_r], [pthread_kill],
+            [gl_pthread_api=yes
+             LIBPTHREAD=-lc_r
+             LIBPMULTITHREAD=-lc_r])
+        fi
+      fi
+      echo "$as_me:__oline__: LIBPMULTITHREAD=$LIBPMULTITHREAD" >&AS_MESSAGE_LOG_FD
+    fi
+    AC_MSG_CHECKING([whether POSIX threads API is available])
+    AC_MSG_RESULT([$gl_pthread_api])
+    AC_SUBST([LIBPTHREAD])
+    AC_SUBST([LIBPMULTITHREAD])
+    if test $gl_pthread_api = yes; then
+      AC_DEFINE([HAVE_PTHREAD_API], [1],
+        [Define if you have the <pthread.h> header and the POSIX threads API.])
+    fi
+
+    dnl On some systems, sched_yield is in librt, rather than in libpthread.
+    AC_LINK_IFELSE(
+      [AC_LANG_PROGRAM(
+         [[#include <sched.h>]],
+         [[sched_yield ();]])],
+      [LIB_SCHED_YIELD=
+      ],
+      [dnl Solaris 7...10 has sched_yield in librt, not in libpthread or libc.
+       AC_CHECK_LIB([rt], [sched_yield], [LIB_SCHED_YIELD=-lrt],
+         [dnl Solaris 2.5.1, 2.6 has sched_yield in libposix4, not librt.
+          AC_CHECK_LIB([posix4], [sched_yield], [LIB_SCHED_YIELD=-lposix4])])
+      ])
+    AC_SUBST([LIB_SCHED_YIELD])
+
+    gl_pthreadlib_body_done=done
+  fi
+])
+
+AC_DEFUN([gl_PTHREADLIB],
+[
+  AC_REQUIRE([gl_ANYTHREADLIB_EARLY])
+  gl_PTHREADLIB_BODY
+])
+
+dnl ============================================================================
+dnl Macros for the ISO C API
+
+dnl gl_STDTHREADLIB
+dnl ---------------
+dnl Tests for the libraries needs for using the ISO C threads API.
+dnl Sets the variable LIBSTDTHREAD to the linker options for use in a Makefile.
+dnl Adds to CPPFLAGS the flag -D_REENTRANT or -D_THREAD_SAFE if needed for
+dnl multithread-safe programs.
+dnl Defines the C macro HAVE_THREADS_H if (at least parts of) the ISO C threads
+dnl API is available.
+
+dnl The guts of gl_STDTHREADLIB. Needs to be expanded only once.
+
+AC_DEFUN([gl_STDTHREADLIB_BODY],
+[
+  AC_REQUIRE([gl_ANYTHREADLIB_EARLY])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  if test -z "$gl_stdthreadlib_body_done"; then
+    AC_CHECK_HEADERS_ONCE([threads.h])
+
+    case "$host_os" in
+      mingw*)
+        LIBSTDTHREAD=
+        ;;
+      *)
+        gl_PTHREADLIB_BODY
+        if test $ac_cv_header_threads_h = yes; then
+          dnl glibc >= 2.29 has thrd_create in libpthread.
+          dnl FreeBSD >= 10 has thrd_create in libstdthreads; this library depends
+          dnl on libpthread (for the symbol 'pthread_mutexattr_gettype').
+          dnl glibc >= 2.34, AIX >= 7.1, and Solaris >= 11.4 have thrd_create in
+          dnl libc.
+          AC_CHECK_FUNCS([thrd_create])
+          if test $ac_cv_func_thrd_create = yes; then
+            LIBSTDTHREAD=
+          else
+            AC_CHECK_LIB([stdthreads], [thrd_create], [
+              LIBSTDTHREAD='-lstdthreads -lpthread'
+            ], [
+              dnl Guess that thrd_create is in libpthread.
+              LIBSTDTHREAD="$LIBPMULTITHREAD"
+            ])
+          fi
+        else
+          dnl Libraries needed by thrd.c, mtx.c, cnd.c, tss.c.
+          LIBSTDTHREAD="$LIBPMULTITHREAD $LIB_SCHED_YIELD"
+        fi
+        ;;
+    esac
+    AC_SUBST([LIBSTDTHREAD])
+
+    AC_MSG_CHECKING([whether ISO C threads API is available])
+    AC_MSG_RESULT([$ac_cv_header_threads_h])
+    gl_stdthreadlib_body_done=done
+  fi
+])
+
+AC_DEFUN([gl_STDTHREADLIB],
+[
+  AC_REQUIRE([gl_ANYTHREADLIB_EARLY])
+  gl_STDTHREADLIB_BODY
+])
+
+dnl ============================================================================
+dnl Macros for the Gnulib API
+
+dnl gl_THREADLIB
+dnl ------------
+dnl Tests for a multithreading library to be used.
+dnl If the configure.ac contains a definition of the gl_THREADLIB_DEFAULT_NO
+dnl (it must be placed before the invocation of gl_THREADLIB_EARLY!), then the
+dnl default is 'no', otherwise it is system dependent. In both cases, the user
+dnl can change the choice through the options --enable-threads=choice or
+dnl --disable-threads.
+dnl Defines at most one of the macros USE_ISOC_THREADS, USE_POSIX_THREADS,
+dnl USE_ISOC_AND_POSIX_THREADS, USE_WINDOWS_THREADS.
+dnl The choice --enable-threads=isoc+posix is available only on platforms that
+dnl have both the ISO C and the POSIX threads APIs. It has the effect of using
+dnl the ISO C API for most things and the POSIX API only for creating and
+dnl controlling threads (because there is no equivalent to pthread_atfork in
+dnl the ISO C API).
+dnl Sets the variables LIBTHREAD and LTLIBTHREAD to the linker options for use
+dnl in a Makefile (LIBTHREAD for use without libtool, LTLIBTHREAD for use with
+dnl libtool).
+dnl Sets the variables LIBMULTITHREAD and LTLIBMULTITHREAD similarly, for
+dnl programs that really need multithread functionality. The difference
+dnl between LIBTHREAD and LIBMULTITHREAD is that on platforms supporting weak
+dnl symbols, typically LIBTHREAD is empty whereas LIBMULTITHREAD is not.
+dnl Adds to CPPFLAGS the flag -D_REENTRANT or -D_THREAD_SAFE if needed for
+dnl multithread-safe programs.
+dnl Since support for GNU pth was removed, $LTLIBTHREAD and $LIBTHREAD have the
+dnl same value, and similarly $LTLIBMULTITHREAD and $LIBMULTITHREAD have the
+dnl same value. Only system libraries are needed.
+
+AC_DEFUN([gl_THREADLIB_EARLY],
+[
+  AC_REQUIRE([gl_THREADLIB_EARLY_BODY])
+])
+
+dnl The guts of gl_THREADLIB_EARLY. Needs to be expanded only once.
+
+AC_DEFUN([gl_THREADLIB_EARLY_BODY],
+[
+  dnl Ordering constraints: This macro modifies CPPFLAGS in a way that
+  dnl influences the result of the autoconf tests that test for *_unlocked
+  dnl declarations, on AIX 5 at least. Therefore it must come early.
+  AC_BEFORE([$0], [gl_FUNC_GLIBC_UNLOCKED_IO])dnl
+  AC_BEFORE([$0], [gl_ARGP])dnl
+
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  dnl _GNU_SOURCE is needed for pthread_rwlock_t on glibc systems.
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+  dnl Check for multithreading.
+  m4_ifdef([gl_THREADLIB_DEFAULT_NO],
+    [m4_divert_text([DEFAULTS], [gl_use_threads_default=no])],
+    [m4_divert_text([DEFAULTS], [gl_use_threads_default=])])
+  m4_divert_text([DEFAULTS], [gl_use_winpthreads_default=])
+  AC_ARG_ENABLE([threads],
+AS_HELP_STRING([--enable-threads={isoc|posix|isoc+posix|windows}], [specify multithreading API])m4_ifdef([gl_THREADLIB_DEFAULT_NO], [], [
+AS_HELP_STRING([--disable-threads], [build without multithread safety])]),
+    [gl_use_threads=$enableval],
+    [if test -n "$gl_use_threads_default"; then
+       gl_use_threads="$gl_use_threads_default"
+     else
+changequote(,)dnl
+       case "$host_os" in
+         dnl Disable multithreading by default on OSF/1, because it interferes
+         dnl with fork()/exec(): When msgexec is linked with -lpthread, its
+         dnl child process gets an endless segmentation fault inside execvp().
+         osf*) gl_use_threads=no ;;
+         dnl Disable multithreading by default on Cygwin 1.5.x, because it has
+         dnl bugs that lead to endless loops or crashes. See
+         dnl <https://cygwin.com/ml/cygwin/2009-08/msg00283.html>.
+         cygwin*)
+               case `uname -r` in
+                 1.[0-5].*) gl_use_threads=no ;;
+                 *)         gl_use_threads=yes ;;
+               esac
+               ;;
+         dnl Obey gl_AVOID_WINPTHREAD on mingw.
+         mingw*)
+               case "$gl_use_winpthreads_default" in
+                 yes) gl_use_threads=posix ;;
+                 no)  gl_use_threads=windows ;;
+                 *)   gl_use_threads=yes ;;
+               esac
+               ;;
+         *)    gl_use_threads=yes ;;
+       esac
+changequote([,])dnl
+     fi
+    ])
+  if test "$gl_use_threads" = yes \
+     || test "$gl_use_threads" = isoc \
+     || test "$gl_use_threads" = posix \
+     || test "$gl_use_threads" = isoc+posix; then
+    # For using <threads.h> or <pthread.h>:
+    gl_ANYTHREADLIB_EARLY
+  fi
+])
+
+dnl The guts of gl_THREADLIB. Needs to be expanded only once.
+
+AC_DEFUN([gl_THREADLIB_BODY],
+[
+  AC_REQUIRE([gl_THREADLIB_EARLY_BODY])
+  gl_threads_api=none
+  LIBTHREAD=
+  LTLIBTHREAD=
+  LIBMULTITHREAD=
+  LTLIBMULTITHREAD=
+  if test "$gl_use_threads" != no; then
+    dnl Check whether the compiler and linker support weak declarations.
+    gl_WEAK_SYMBOLS
+    if case "$gl_cv_have_weak" in *yes) true;; *) false;; esac; then
+      dnl If we use weak symbols to implement pthread_in_use / pth_in_use /
+      dnl thread_in_use, we also need to test whether the ISO C 11 thrd_create
+      dnl facility is in use.
+      AC_CHECK_HEADERS_ONCE([threads.h])
+      :
+    fi
+    if test "$gl_use_threads" = isoc || test "$gl_use_threads" = isoc+posix; then
+      AC_CHECK_HEADERS_ONCE([threads.h])
+      gl_have_isoc_threads="$ac_cv_header_threads_h"
+    fi
+    if test "$gl_use_threads" = yes \
+       || test "$gl_use_threads" = posix \
+       || test "$gl_use_threads" = isoc+posix; then
+      gl_PTHREADLIB_BODY
+      LIBTHREAD=$LIBPTHREAD LTLIBTHREAD=$LIBPTHREAD
+      LIBMULTITHREAD=$LIBPMULTITHREAD LTLIBMULTITHREAD=$LIBPMULTITHREAD
+      if test $gl_pthread_api = yes; then
+        if test "$gl_use_threads" = isoc+posix && test "$gl_have_isoc_threads" = yes; then
+          gl_threads_api='isoc+posix'
+          AC_DEFINE([USE_ISOC_AND_POSIX_THREADS], [1],
+            [Define if the combination of the ISO C and POSIX multithreading APIs can be used.])
+          LIBTHREAD= LTLIBTHREAD=
+        else
+          gl_threads_api=posix
+          AC_DEFINE([USE_POSIX_THREADS], [1],
+            [Define if the POSIX multithreading library can be used.])
+          if test -z "$LIBMULTITHREAD" && test -z "$LTLIBMULTITHREAD"; then
+            AC_DEFINE([USE_POSIX_THREADS_FROM_LIBC], [1],
+              [Define if references to the POSIX multithreading library are satisfied by libc.])
+          else
+            if case "$gl_cv_have_weak" in *yes) true;; *) false;; esac; then
+              AC_DEFINE([USE_POSIX_THREADS_WEAK], [1],
+                [Define if references to the POSIX multithreading library should be made weak.])
+              LIBTHREAD= LTLIBTHREAD=
+            else
+              case "$host_os" in
+                freebsd* | dragonfly* | midnightbsd*)
+                  if test "x$LIBTHREAD" != "x$LIBMULTITHREAD"; then
+                    dnl If weak symbols can't tell whether pthread_create(), pthread_key_create()
+                    dnl etc. will succeed, we need a runtime test.
+                    AC_DEFINE([PTHREAD_IN_USE_DETECTION_HARD], [1],
+                      [Define if the pthread_in_use() detection is hard.])
+                  fi
+                  ;;
+              esac
+            fi
+          fi
+        fi
+      fi
+    fi
+    if test $gl_threads_api = none; then
+      if test "$gl_use_threads" = isoc && test "$gl_have_isoc_threads" = yes; then
+        gl_STDTHREADLIB_BODY
+        LIBTHREAD=$LIBSTDTHREAD LTLIBTHREAD=$LIBSTDTHREAD
+        LIBMULTITHREAD=$LIBSTDTHREAD LTLIBMULTITHREAD=$LIBSTDTHREAD
+        gl_threads_api=isoc
+        AC_DEFINE([USE_ISOC_THREADS], [1],
+          [Define if the ISO C multithreading library can be used.])
+      fi
+    fi
+    if test $gl_threads_api = none; then
+      case "$gl_use_threads" in
+        yes | windows | win32) # The 'win32' is for backward compatibility.
+          if { case "$host_os" in
+                 mingw*) true;;
+                 *) false;;
+               esac
+             }; then
+            gl_threads_api=windows
+            AC_DEFINE([USE_WINDOWS_THREADS], [1],
+              [Define if the native Windows multithreading API can be used.])
+          fi
+          ;;
+      esac
+    fi
+  fi
+  AC_MSG_CHECKING([for multithread API to use])
+  AC_MSG_RESULT([$gl_threads_api])
+  AC_SUBST([LIBTHREAD])
+  AC_SUBST([LTLIBTHREAD])
+  AC_SUBST([LIBMULTITHREAD])
+  AC_SUBST([LTLIBMULTITHREAD])
+])
+
+AC_DEFUN([gl_THREADLIB],
+[
+  AC_REQUIRE([gl_THREADLIB_EARLY])
+  AC_REQUIRE([gl_THREADLIB_BODY])
+])
+
+
+dnl gl_DISABLE_THREADS
+dnl ------------------
+dnl Sets the gl_THREADLIB default so that threads are not used by default.
+dnl The user can still override it at installation time, by using the
+dnl configure option '--enable-threads'.
+
+AC_DEFUN([gl_DISABLE_THREADS], [
+  m4_divert_text([INIT_PREPARE], [gl_use_threads_default=no])
+])
+
+
+dnl gl_AVOID_WINPTHREAD
+dnl -------------------
+dnl Sets the gl_THREADLIB default so that on mingw, a dependency to the
+dnl libwinpthread DLL (mingw-w64 winpthreads library) is avoided.
+dnl The user can still override it at installation time, by using the
+dnl configure option '--enable-threads'.
+
+AC_DEFUN([gl_AVOID_WINPTHREAD], [
+  m4_divert_text([INIT_PREPARE], [gl_use_winpthreads_default=no])
+])
+
+
+dnl ============================================================================
+
+
+dnl Survey of platforms:
+dnl
+dnl Platform           Available  Compiler    Supports   test-lock
+dnl                    flavours   option      weak       result
+dnl ---------------    ---------  ---------   --------   ---------
+dnl Linux 2.4/glibc    posix      -lpthread       Y      OK
+dnl
+dnl Linux/glibc 2.34   posix                      Y      OK
+dnl
+dnl GNU Hurd/glibc     posix      -lpthread       Y      OK
+dnl
+dnl Ubuntu 14.04       posix      -pthread        Y      OK
+dnl
+dnl FreeBSD 5.3        posix      -lc_r           Y
+dnl                    posix      -lkse ?         Y
+dnl                    posix      -lpthread ?     Y
+dnl                    posix      -lthr           Y
+dnl
+dnl FreeBSD 5.2        posix      -lc_r           Y
+dnl                    posix      -lkse           Y
+dnl                    posix      -lthr           Y
+dnl
+dnl FreeBSD 4.0,4.10   posix      -lc_r           Y      OK
+dnl
+dnl NetBSD 1.6         --
+dnl
+dnl OpenBSD 3.4        posix      -lpthread       Y      OK
+dnl
+dnl Mac OS X 10.[123]  posix      -lpthread       Y      OK
+dnl
+dnl Solaris 7,8,9      posix      -lpthread       Y      Sol 7,8: 0.0; Sol 9: OK
+dnl
+dnl HP-UX 11           posix      -lpthread       N (cc) OK
+dnl                                               Y (gcc)
+dnl
+dnl IRIX 6.5           posix      -lpthread       Y      0.5
+dnl
+dnl AIX 4.3,5.1        posix      -lpthread       N      AIX 4: 0.5; AIX 5: OK
+dnl
+dnl OSF/1 4.0,5.1      posix      -pthread (cc)   N      OK
+dnl                               -lpthread (gcc) Y
+dnl
+dnl Cygwin             posix      -lpthread       Y      OK
+dnl
+dnl Mingw              windows                    N      OK
+dnl
+dnl BeOS 5             --
+dnl
+dnl The test-lock result shows what happens if in test-lock.c EXPLICIT_YIELD is
+dnl turned off:
+dnl   OK if all three tests terminate OK,
+dnl   0.5 if the first test terminates OK but the second one loops endlessly,
+dnl   0.0 if the first test already loops endlessly.
diff --git a/src/grep/m4/time_h.m4 b/src/grep/m4/time_h.m4
new file mode 100644
index 0000000..b57474b
--- /dev/null
+++ b/src/grep/m4/time_h.m4
@@ -0,0 +1,175 @@
+# Configure a more-standard replacement for <time.h>.
+
+# Copyright (C) 2000-2001, 2003-2007, 2009-2021 Free Software Foundation, Inc.
+
+# serial 18
+
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# Written by Paul Eggert and Jim Meyering.
+
+AC_DEFUN_ONCE([gl_TIME_H],
+[
+  dnl Ensure to expand the default settings once only, before all statements
+  dnl that occur in other macros.
+  AC_REQUIRE([gl_TIME_H_DEFAULTS])
+
+  gl_NEXT_HEADERS([time.h])
+  AC_REQUIRE([gl_CHECK_TYPE_STRUCT_TIMESPEC])
+
+  AC_REQUIRE([AC_C_RESTRICT])
+
+  AC_CACHE_CHECK([for TIME_UTC in <time.h>],
+    [gl_cv_time_h_has_TIME_UTC],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <time.h>
+          ]],
+          [[static int x = TIME_UTC; x++;]])],
+       [gl_cv_time_h_has_TIME_UTC=yes],
+       [gl_cv_time_h_has_TIME_UTC=no])])
+  if test $gl_cv_time_h_has_TIME_UTC = yes; then
+    TIME_H_DEFINES_TIME_UTC=1
+  else
+    TIME_H_DEFINES_TIME_UTC=0
+  fi
+  AC_SUBST([TIME_H_DEFINES_TIME_UTC])
+])
+
+dnl Check whether 'struct timespec' is declared
+dnl in time.h, sys/time.h, pthread.h, or unistd.h.
+
+AC_DEFUN([gl_CHECK_TYPE_STRUCT_TIMESPEC],
+[
+  AC_CHECK_HEADERS_ONCE([sys/time.h])
+  AC_CACHE_CHECK([for struct timespec in <time.h>],
+    [gl_cv_sys_struct_timespec_in_time_h],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <time.h>
+          ]],
+          [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
+       [gl_cv_sys_struct_timespec_in_time_h=yes],
+       [gl_cv_sys_struct_timespec_in_time_h=no])])
+
+  TIME_H_DEFINES_STRUCT_TIMESPEC=0
+  SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=0
+  PTHREAD_H_DEFINES_STRUCT_TIMESPEC=0
+  UNISTD_H_DEFINES_STRUCT_TIMESPEC=0
+  if test $gl_cv_sys_struct_timespec_in_time_h = yes; then
+    TIME_H_DEFINES_STRUCT_TIMESPEC=1
+  else
+    AC_CACHE_CHECK([for struct timespec in <sys/time.h>],
+      [gl_cv_sys_struct_timespec_in_sys_time_h],
+      [AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[#include <sys/time.h>
+            ]],
+            [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
+         [gl_cv_sys_struct_timespec_in_sys_time_h=yes],
+         [gl_cv_sys_struct_timespec_in_sys_time_h=no])])
+    if test $gl_cv_sys_struct_timespec_in_sys_time_h = yes; then
+      SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=1
+    else
+      AC_CACHE_CHECK([for struct timespec in <pthread.h>],
+        [gl_cv_sys_struct_timespec_in_pthread_h],
+        [AC_COMPILE_IFELSE(
+           [AC_LANG_PROGRAM(
+              [[#include <pthread.h>
+              ]],
+              [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
+           [gl_cv_sys_struct_timespec_in_pthread_h=yes],
+           [gl_cv_sys_struct_timespec_in_pthread_h=no])])
+      if test $gl_cv_sys_struct_timespec_in_pthread_h = yes; then
+        PTHREAD_H_DEFINES_STRUCT_TIMESPEC=1
+      else
+        AC_CACHE_CHECK([for struct timespec in <unistd.h>],
+          [gl_cv_sys_struct_timespec_in_unistd_h],
+          [AC_COMPILE_IFELSE(
+             [AC_LANG_PROGRAM(
+                [[#include <unistd.h>
+                ]],
+                [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
+             [gl_cv_sys_struct_timespec_in_unistd_h=yes],
+             [gl_cv_sys_struct_timespec_in_unistd_h=no])])
+        if test $gl_cv_sys_struct_timespec_in_unistd_h = yes; then
+          UNISTD_H_DEFINES_STRUCT_TIMESPEC=1
+        fi
+      fi
+    fi
+  fi
+  AC_SUBST([TIME_H_DEFINES_STRUCT_TIMESPEC])
+  AC_SUBST([SYS_TIME_H_DEFINES_STRUCT_TIMESPEC])
+  AC_SUBST([PTHREAD_H_DEFINES_STRUCT_TIMESPEC])
+  AC_SUBST([UNISTD_H_DEFINES_STRUCT_TIMESPEC])
+])
+
+# gl_TIME_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_TIME_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_TIME_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_TIME_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_TIME_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_CTIME])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKTIME])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LOCALTIME])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_NANOSLEEP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRFTIME])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRPTIME])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TIMEGM])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TIMESPEC_GET])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TIME_R])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TIME_RZ])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TZSET])
+    dnl Support Microsoft deprecated alias function names by default.
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_TZSET], [1])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_TIME_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_TIME_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_TIME_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_DECL_LOCALTIME_R=1;               AC_SUBST([HAVE_DECL_LOCALTIME_R])
+  HAVE_NANOSLEEP=1;                      AC_SUBST([HAVE_NANOSLEEP])
+  HAVE_STRPTIME=1;                       AC_SUBST([HAVE_STRPTIME])
+  HAVE_TIMEGM=1;                         AC_SUBST([HAVE_TIMEGM])
+  HAVE_TIMESPEC_GET=1;                   AC_SUBST([HAVE_TIMESPEC_GET])
+  dnl Even GNU libc does not have timezone_t yet.
+  HAVE_TIMEZONE_T=0;                     AC_SUBST([HAVE_TIMEZONE_T])
+  dnl If another module says to replace or to not replace, do that.
+  dnl Otherwise, replace only if someone compiles with -DGNULIB_PORTCHECK;
+  dnl this lets maintainers check for portability.
+  REPLACE_CTIME=GNULIB_PORTCHECK;        AC_SUBST([REPLACE_CTIME])
+  REPLACE_LOCALTIME_R=GNULIB_PORTCHECK;  AC_SUBST([REPLACE_LOCALTIME_R])
+  REPLACE_MKTIME=GNULIB_PORTCHECK;       AC_SUBST([REPLACE_MKTIME])
+  REPLACE_NANOSLEEP=GNULIB_PORTCHECK;    AC_SUBST([REPLACE_NANOSLEEP])
+  REPLACE_STRFTIME=GNULIB_PORTCHECK;     AC_SUBST([REPLACE_STRFTIME])
+  REPLACE_TIMEGM=GNULIB_PORTCHECK;       AC_SUBST([REPLACE_TIMEGM])
+  REPLACE_TZSET=GNULIB_PORTCHECK;        AC_SUBST([REPLACE_TZSET])
+
+  dnl Hack so that the time module doesn't depend on the sys_time module.
+  dnl First, default GNULIB_GETTIMEOFDAY to 0 if sys_time is absent.
+  : ${GNULIB_GETTIMEOFDAY=0};            AC_SUBST([GNULIB_GETTIMEOFDAY])
+  dnl Second, it's OK to not use GNULIB_PORTCHECK for REPLACE_GMTIME
+  dnl and REPLACE_LOCALTIME, as portability to Solaris 2.6 and earlier
+  dnl is no longer a big deal.
+  REPLACE_GMTIME=0;                      AC_SUBST([REPLACE_GMTIME])
+  REPLACE_LOCALTIME=0;                   AC_SUBST([REPLACE_LOCALTIME])
+])
diff --git a/src/grep/m4/unistd-safer.m4 b/src/grep/m4/unistd-safer.m4
new file mode 100644
index 0000000..c205446
--- /dev/null
+++ b/src/grep/m4/unistd-safer.m4
@@ -0,0 +1,10 @@
+#serial 9
+dnl Copyright (C) 2002, 2005-2006, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_UNISTD_SAFER],
+[
+  AC_CHECK_FUNCS_ONCE([pipe])
+])
diff --git a/src/grep/m4/unistd_h.m4 b/src/grep/m4/unistd_h.m4
new file mode 100644
index 0000000..0ce4ea4
--- /dev/null
+++ b/src/grep/m4/unistd_h.m4
@@ -0,0 +1,267 @@
+# unistd_h.m4 serial 89
+dnl Copyright (C) 2006-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Written by Simon Josefsson, Bruno Haible.
+
+AC_DEFUN_ONCE([gl_UNISTD_H],
+[
+  dnl Ensure to expand the default settings once only, before all statements
+  dnl that occur in other macros.
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+
+  gl_CHECK_NEXT_HEADERS([unistd.h])
+  if test $ac_cv_header_unistd_h = yes; then
+    HAVE_UNISTD_H=1
+  else
+    HAVE_UNISTD_H=0
+  fi
+  AC_SUBST([HAVE_UNISTD_H])
+
+  dnl Ensure the type pid_t gets defined.
+  AC_REQUIRE([AC_TYPE_PID_T])
+
+  dnl Determine WINDOWS_64_BIT_OFF_T.
+  AC_REQUIRE([gl_TYPE_OFF_T])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+/* Some systems declare various items in the wrong headers.  */
+#if !(defined __GLIBC__ && !defined __UCLIBC__)
+# include <fcntl.h>
+# include <stdio.h>
+# include <stdlib.h>
+# if defined _WIN32 && ! defined __CYGWIN__
+#  include <io.h>
+# endif
+#endif
+    ]], [access chdir chown copy_file_range dup dup2 dup3 environ euidaccess
+    execl execle execlp execv execve execvp execvpe
+    faccessat fchdir
+    fchownat fdatasync fsync ftruncate getcwd getdomainname getdtablesize
+    getentropy getgroups gethostname getlogin getlogin_r getpagesize getpass
+    getusershell setusershell endusershell
+    group_member isatty lchown link linkat lseek pipe pipe2 pread pwrite
+    readlink readlinkat rmdir sethostname sleep symlink symlinkat
+    truncate ttyname_r unlink unlinkat usleep])
+
+  AC_REQUIRE([AC_C_RESTRICT])
+
+  AC_CHECK_DECLS_ONCE([execvpe])
+  if test $ac_cv_have_decl_execvpe = no; then
+    HAVE_DECL_EXECVPE=0
+  fi
+])
+
+# gl_UNISTD_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_UNISTD_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_UNISTD_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_UNISTD_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_UNISTD_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ACCESS])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_CHDIR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_CHOWN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_CLOSE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_COPY_FILE_RANGE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_DUP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_DUP2])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_DUP3])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ENVIRON])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_EUIDACCESS])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_EXECL])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_EXECLE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_EXECLP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_EXECV])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_EXECVE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_EXECVP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_EXECVPE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FACCESSAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FCHDIR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FCHOWNAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FDATASYNC])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FSYNC])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FTRUNCATE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETCWD])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETDOMAINNAME])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETDTABLESIZE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETENTROPY])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETGROUPS])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETHOSTNAME])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETLOGIN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETLOGIN_R])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETOPT_POSIX])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETPAGESIZE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETPASS])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETUSERSHELL])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GROUP_MEMBER])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISATTY])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LCHOWN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LINK])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LINKAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LSEEK])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PIPE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PIPE2])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PREAD])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PWRITE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_READ])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_READLINK])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_READLINKAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_RMDIR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SETHOSTNAME])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SLEEP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SYMLINK])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SYMLINKAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TRUNCATE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TTYNAME_R])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_UNISTD_H_GETOPT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_UNISTD_H_NONBLOCKING])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_UNISTD_H_SIGPIPE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_UNLINK])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_UNLINKAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_USLEEP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WRITE])
+    dnl Support Microsoft deprecated alias function names by default.
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_ACCESS], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_CHDIR], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_CLOSE], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_DUP], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_DUP2], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_EXECL], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_EXECLE], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_EXECLP], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_EXECV], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_EXECVE], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_EXECVP], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_EXECVPE], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_GETCWD], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_GETPID], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_ISATTY], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_LSEEK], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_READ], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_RMDIR], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_SWAB], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_UNLINK], [1])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_WRITE], [1])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_UNISTD_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_UNISTD_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_CHOWN=1;           AC_SUBST([HAVE_CHOWN])
+  HAVE_COPY_FILE_RANGE=1; AC_SUBST([HAVE_COPY_FILE_RANGE])
+  HAVE_DUP3=1;            AC_SUBST([HAVE_DUP3])
+  HAVE_EUIDACCESS=1;      AC_SUBST([HAVE_EUIDACCESS])
+  HAVE_EXECVPE=1;         AC_SUBST([HAVE_EXECVPE])
+  HAVE_FACCESSAT=1;       AC_SUBST([HAVE_FACCESSAT])
+  HAVE_FCHDIR=1;          AC_SUBST([HAVE_FCHDIR])
+  HAVE_FCHOWNAT=1;        AC_SUBST([HAVE_FCHOWNAT])
+  HAVE_FDATASYNC=1;       AC_SUBST([HAVE_FDATASYNC])
+  HAVE_FSYNC=1;           AC_SUBST([HAVE_FSYNC])
+  HAVE_FTRUNCATE=1;       AC_SUBST([HAVE_FTRUNCATE])
+  HAVE_GETDTABLESIZE=1;   AC_SUBST([HAVE_GETDTABLESIZE])
+  HAVE_GETENTROPY=1;      AC_SUBST([HAVE_GETENTROPY])
+  HAVE_GETGROUPS=1;       AC_SUBST([HAVE_GETGROUPS])
+  HAVE_GETHOSTNAME=1;     AC_SUBST([HAVE_GETHOSTNAME])
+  HAVE_GETLOGIN=1;        AC_SUBST([HAVE_GETLOGIN])
+  HAVE_GETPAGESIZE=1;     AC_SUBST([HAVE_GETPAGESIZE])
+  HAVE_GETPASS=1;         AC_SUBST([HAVE_GETPASS])
+  HAVE_GROUP_MEMBER=1;    AC_SUBST([HAVE_GROUP_MEMBER])
+  HAVE_LCHOWN=1;          AC_SUBST([HAVE_LCHOWN])
+  HAVE_LINK=1;            AC_SUBST([HAVE_LINK])
+  HAVE_LINKAT=1;          AC_SUBST([HAVE_LINKAT])
+  HAVE_PIPE=1;            AC_SUBST([HAVE_PIPE])
+  HAVE_PIPE2=1;           AC_SUBST([HAVE_PIPE2])
+  HAVE_PREAD=1;           AC_SUBST([HAVE_PREAD])
+  HAVE_PWRITE=1;          AC_SUBST([HAVE_PWRITE])
+  HAVE_READLINK=1;        AC_SUBST([HAVE_READLINK])
+  HAVE_READLINKAT=1;      AC_SUBST([HAVE_READLINKAT])
+  HAVE_SETHOSTNAME=1;     AC_SUBST([HAVE_SETHOSTNAME])
+  HAVE_SLEEP=1;           AC_SUBST([HAVE_SLEEP])
+  HAVE_SYMLINK=1;         AC_SUBST([HAVE_SYMLINK])
+  HAVE_SYMLINKAT=1;       AC_SUBST([HAVE_SYMLINKAT])
+  HAVE_UNLINKAT=1;        AC_SUBST([HAVE_UNLINKAT])
+  HAVE_USLEEP=1;          AC_SUBST([HAVE_USLEEP])
+  HAVE_DECL_ENVIRON=1;    AC_SUBST([HAVE_DECL_ENVIRON])
+  HAVE_DECL_EXECVPE=1;    AC_SUBST([HAVE_DECL_EXECVPE])
+  HAVE_DECL_FCHDIR=1;     AC_SUBST([HAVE_DECL_FCHDIR])
+  HAVE_DECL_FDATASYNC=1;  AC_SUBST([HAVE_DECL_FDATASYNC])
+  HAVE_DECL_GETDOMAINNAME=1; AC_SUBST([HAVE_DECL_GETDOMAINNAME])
+  HAVE_DECL_GETLOGIN=1;   AC_SUBST([HAVE_DECL_GETLOGIN])
+  HAVE_DECL_GETLOGIN_R=1; AC_SUBST([HAVE_DECL_GETLOGIN_R])
+  HAVE_DECL_GETPAGESIZE=1; AC_SUBST([HAVE_DECL_GETPAGESIZE])
+  HAVE_DECL_GETUSERSHELL=1; AC_SUBST([HAVE_DECL_GETUSERSHELL])
+  HAVE_DECL_SETHOSTNAME=1; AC_SUBST([HAVE_DECL_SETHOSTNAME])
+  HAVE_DECL_TRUNCATE=1;   AC_SUBST([HAVE_DECL_TRUNCATE])
+  HAVE_DECL_TTYNAME_R=1;  AC_SUBST([HAVE_DECL_TTYNAME_R])
+  HAVE_OS_H=0;            AC_SUBST([HAVE_OS_H])
+  HAVE_SYS_PARAM_H=0;     AC_SUBST([HAVE_SYS_PARAM_H])
+  REPLACE_ACCESS=0;       AC_SUBST([REPLACE_ACCESS])
+  REPLACE_CHOWN=0;        AC_SUBST([REPLACE_CHOWN])
+  REPLACE_CLOSE=0;        AC_SUBST([REPLACE_CLOSE])
+  REPLACE_DUP=0;          AC_SUBST([REPLACE_DUP])
+  REPLACE_DUP2=0;         AC_SUBST([REPLACE_DUP2])
+  REPLACE_EXECL=0;        AC_SUBST([REPLACE_EXECL])
+  REPLACE_EXECLE=0;       AC_SUBST([REPLACE_EXECLE])
+  REPLACE_EXECLP=0;       AC_SUBST([REPLACE_EXECLP])
+  REPLACE_EXECV=0;        AC_SUBST([REPLACE_EXECV])
+  REPLACE_EXECVE=0;       AC_SUBST([REPLACE_EXECVE])
+  REPLACE_EXECVP=0;       AC_SUBST([REPLACE_EXECVP])
+  REPLACE_EXECVPE=0;      AC_SUBST([REPLACE_EXECVPE])
+  REPLACE_FACCESSAT=0;    AC_SUBST([REPLACE_FACCESSAT])
+  REPLACE_FCHOWNAT=0;     AC_SUBST([REPLACE_FCHOWNAT])
+  REPLACE_FTRUNCATE=0;    AC_SUBST([REPLACE_FTRUNCATE])
+  REPLACE_GETCWD=0;       AC_SUBST([REPLACE_GETCWD])
+  REPLACE_GETDOMAINNAME=0; AC_SUBST([REPLACE_GETDOMAINNAME])
+  REPLACE_GETDTABLESIZE=0; AC_SUBST([REPLACE_GETDTABLESIZE])
+  REPLACE_GETLOGIN_R=0;   AC_SUBST([REPLACE_GETLOGIN_R])
+  REPLACE_GETGROUPS=0;    AC_SUBST([REPLACE_GETGROUPS])
+  REPLACE_GETPAGESIZE=0;  AC_SUBST([REPLACE_GETPAGESIZE])
+  REPLACE_GETPASS=0;      AC_SUBST([REPLACE_GETPASS])
+  REPLACE_ISATTY=0;       AC_SUBST([REPLACE_ISATTY])
+  REPLACE_LCHOWN=0;       AC_SUBST([REPLACE_LCHOWN])
+  REPLACE_LINK=0;         AC_SUBST([REPLACE_LINK])
+  REPLACE_LINKAT=0;       AC_SUBST([REPLACE_LINKAT])
+  REPLACE_LSEEK=0;        AC_SUBST([REPLACE_LSEEK])
+  REPLACE_PREAD=0;        AC_SUBST([REPLACE_PREAD])
+  REPLACE_PWRITE=0;       AC_SUBST([REPLACE_PWRITE])
+  REPLACE_READ=0;         AC_SUBST([REPLACE_READ])
+  REPLACE_READLINK=0;     AC_SUBST([REPLACE_READLINK])
+  REPLACE_READLINKAT=0;   AC_SUBST([REPLACE_READLINKAT])
+  REPLACE_RMDIR=0;        AC_SUBST([REPLACE_RMDIR])
+  REPLACE_SLEEP=0;        AC_SUBST([REPLACE_SLEEP])
+  REPLACE_SYMLINK=0;      AC_SUBST([REPLACE_SYMLINK])
+  REPLACE_SYMLINKAT=0;    AC_SUBST([REPLACE_SYMLINKAT])
+  REPLACE_TRUNCATE=0;     AC_SUBST([REPLACE_TRUNCATE])
+  REPLACE_TTYNAME_R=0;    AC_SUBST([REPLACE_TTYNAME_R])
+  REPLACE_UNLINK=0;       AC_SUBST([REPLACE_UNLINK])
+  REPLACE_UNLINKAT=0;     AC_SUBST([REPLACE_UNLINKAT])
+  REPLACE_USLEEP=0;       AC_SUBST([REPLACE_USLEEP])
+  REPLACE_WRITE=0;        AC_SUBST([REPLACE_WRITE])
+  UNISTD_H_HAVE_SYS_RANDOM_H=0; AC_SUBST([UNISTD_H_HAVE_SYS_RANDOM_H])
+  UNISTD_H_HAVE_WINSOCK2_H=0; AC_SUBST([UNISTD_H_HAVE_WINSOCK2_H])
+  UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS=0;
+                           AC_SUBST([UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS])
+])
diff --git a/src/grep/m4/unlocked-io.m4 b/src/grep/m4/unlocked-io.m4
new file mode 100644
index 0000000..b689020
--- /dev/null
+++ b/src/grep/m4/unlocked-io.m4
@@ -0,0 +1,36 @@
+# unlocked-io.m4 serial 16
+
+# Copyright (C) 1998-2006, 2009-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+dnl From Jim Meyering.
+dnl
+dnl See if the glibc *_unlocked I/O macros or functions are available.
+dnl Use only those *_unlocked macros or functions that are declared
+dnl (because some of them were declared in Solaris 2.5.1 but were removed
+dnl in Solaris 2.6, whereas we want binaries built on Solaris 2.5.1 to run
+dnl on Solaris 2.6).
+
+AC_DEFUN([gl_FUNC_GLIBC_UNLOCKED_IO],
+[
+  dnl Persuade glibc and Solaris <stdio.h> to declare
+  dnl fgets_unlocked(), fputs_unlocked() etc.
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+  AC_CHECK_DECLS_ONCE([clearerr_unlocked])
+  AC_CHECK_DECLS_ONCE([feof_unlocked])
+  AC_CHECK_DECLS_ONCE([ferror_unlocked])
+  AC_CHECK_DECLS_ONCE([fflush_unlocked])
+  AC_CHECK_DECLS_ONCE([fgets_unlocked])
+  AC_CHECK_DECLS_ONCE([fputc_unlocked])
+  AC_CHECK_DECLS_ONCE([fputs_unlocked])
+  AC_CHECK_DECLS_ONCE([fread_unlocked])
+  AC_CHECK_DECLS_ONCE([fwrite_unlocked])
+  AC_CHECK_DECLS_ONCE([getc_unlocked])
+  AC_CHECK_DECLS_ONCE([getchar_unlocked])
+  AC_CHECK_DECLS_ONCE([putc_unlocked])
+  AC_CHECK_DECLS_ONCE([putchar_unlocked])
+])
diff --git a/src/grep/m4/vasnprintf.m4 b/src/grep/m4/vasnprintf.m4
new file mode 100644
index 0000000..483bba9
--- /dev/null
+++ b/src/grep/m4/vasnprintf.m4
@@ -0,0 +1,298 @@
+# vasnprintf.m4 serial 38
+dnl Copyright (C) 2002-2004, 2006-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_VASNPRINTF],
+[
+  AC_CHECK_FUNCS_ONCE([vasnprintf])
+  if test $ac_cv_func_vasnprintf = no; then
+    gl_REPLACE_VASNPRINTF
+  fi
+])
+
+AC_DEFUN([gl_REPLACE_VASNPRINTF],
+[
+  AC_CHECK_FUNCS_ONCE([vasnprintf])
+  AC_LIBOBJ([vasnprintf])
+  AC_LIBOBJ([printf-args])
+  AC_LIBOBJ([printf-parse])
+  AC_LIBOBJ([asnprintf])
+  if test $ac_cv_func_vasnprintf = yes; then
+    AC_DEFINE([REPLACE_VASNPRINTF], [1],
+      [Define if vasnprintf exists but is overridden by gnulib.])
+  fi
+  gl_PREREQ_PRINTF_ARGS
+  gl_PREREQ_PRINTF_PARSE
+  gl_PREREQ_VASNPRINTF
+  gl_PREREQ_ASNPRINTF
+])
+
+# Prerequisites of lib/printf-args.h, lib/printf-args.c.
+AC_DEFUN([gl_PREREQ_PRINTF_ARGS],
+[
+  AC_REQUIRE([gt_TYPE_WCHAR_T])
+  AC_REQUIRE([gt_TYPE_WINT_T])
+])
+
+# Prerequisites of lib/printf-parse.h, lib/printf-parse.c.
+AC_DEFUN([gl_PREREQ_PRINTF_PARSE],
+[
+  AC_REQUIRE([gl_FEATURES_H])
+  AC_REQUIRE([gt_TYPE_WCHAR_T])
+  AC_REQUIRE([gt_TYPE_WINT_T])
+  AC_REQUIRE([AC_TYPE_SIZE_T])
+  AC_CHECK_TYPE([ptrdiff_t], ,
+    [AC_DEFINE([ptrdiff_t], [long],
+       [Define as the type of the result of subtracting two pointers, if the system doesn't define it.])
+    ])
+  AC_REQUIRE([gt_AC_TYPE_INTMAX_T])
+])
+
+# Prerequisites of lib/vasnprintf.c.
+AC_DEFUN_ONCE([gl_PREREQ_VASNPRINTF],
+[
+  AC_REQUIRE([AC_FUNC_ALLOCA])
+  AC_REQUIRE([gt_TYPE_WCHAR_T])
+  AC_REQUIRE([gt_TYPE_WINT_T])
+  AC_CHECK_FUNCS([snprintf strnlen wcslen wcsnlen mbrtowc wcrtomb])
+  dnl Use the _snprintf function only if it is declared (because on NetBSD it
+  dnl is defined as a weak alias of snprintf; we prefer to use the latter).
+  AC_CHECK_DECLS([_snprintf], , , [[#include <stdio.h>]])
+  dnl Knowing DBL_EXPBIT0_WORD and DBL_EXPBIT0_BIT enables an optimization
+  dnl in the code for NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_DOUBLE.
+  AC_REQUIRE([gl_DOUBLE_EXPONENT_LOCATION])
+  dnl We can avoid a lot of code by assuming that snprintf's return value
+  dnl conforms to ISO C99. So check that.
+  AC_REQUIRE([gl_SNPRINTF_RETVAL_C99])
+  case "$gl_cv_func_snprintf_retval_c99" in
+    *yes)
+      AC_DEFINE([HAVE_SNPRINTF_RETVAL_C99], [1],
+        [Define if the return value of the snprintf function is the number of
+         of bytes (excluding the terminating NUL) that would have been produced
+         if the buffer had been large enough.])
+      ;;
+  esac
+  dnl Additionally, the use of %n can be eliminated by assuming that snprintf
+  dnl always produces NUL-terminated strings (no truncation).
+  AC_REQUIRE([gl_SNPRINTF_TRUNCATION_C99])
+  case "$gl_cv_func_snprintf_truncation_c99" in
+    *yes)
+      AC_DEFINE([HAVE_SNPRINTF_TRUNCATION_C99], [1],
+        [Define if the string produced by the snprintf function is always NUL
+         terminated.])
+      ;;
+  esac
+])
+
+# Extra prerequisites of lib/vasnprintf.c for supporting 'long double'
+# arguments.
+AC_DEFUN_ONCE([gl_PREREQ_VASNPRINTF_LONG_DOUBLE],
+[
+  AC_REQUIRE([gl_PRINTF_LONG_DOUBLE])
+  case "$gl_cv_func_printf_long_double" in
+    *yes)
+      ;;
+    *)
+      AC_DEFINE([NEED_PRINTF_LONG_DOUBLE], [1],
+        [Define if the vasnprintf implementation needs special code for
+         'long double' arguments.])
+      ;;
+  esac
+])
+
+# Extra prerequisites of lib/vasnprintf.c for supporting infinite 'double'
+# arguments.
+AC_DEFUN([gl_PREREQ_VASNPRINTF_INFINITE_DOUBLE],
+[
+  AC_REQUIRE([gl_PRINTF_INFINITE])
+  case "$gl_cv_func_printf_infinite" in
+    *yes)
+      ;;
+    *)
+      AC_DEFINE([NEED_PRINTF_INFINITE_DOUBLE], [1],
+        [Define if the vasnprintf implementation needs special code for
+         infinite 'double' arguments.])
+      ;;
+  esac
+])
+
+# Extra prerequisites of lib/vasnprintf.c for supporting infinite 'long double'
+# arguments.
+AC_DEFUN([gl_PREREQ_VASNPRINTF_INFINITE_LONG_DOUBLE],
+[
+  AC_REQUIRE([gl_PRINTF_INFINITE_LONG_DOUBLE])
+  dnl There is no need to set NEED_PRINTF_INFINITE_LONG_DOUBLE if
+  dnl NEED_PRINTF_LONG_DOUBLE is already set.
+  AC_REQUIRE([gl_PREREQ_VASNPRINTF_LONG_DOUBLE])
+  case "$gl_cv_func_printf_long_double" in
+    *yes)
+      case "$gl_cv_func_printf_infinite_long_double" in
+        *yes)
+          ;;
+        *)
+          AC_DEFINE([NEED_PRINTF_INFINITE_LONG_DOUBLE], [1],
+            [Define if the vasnprintf implementation needs special code for
+             infinite 'long double' arguments.])
+          ;;
+      esac
+      ;;
+  esac
+])
+
+# Extra prerequisites of lib/vasnprintf.c for supporting the 'a' directive.
+AC_DEFUN([gl_PREREQ_VASNPRINTF_DIRECTIVE_A],
+[
+  AC_REQUIRE([gl_PRINTF_DIRECTIVE_A])
+  case "$gl_cv_func_printf_directive_a" in
+    *yes)
+      ;;
+    *)
+      AC_DEFINE([NEED_PRINTF_DIRECTIVE_A], [1],
+        [Define if the vasnprintf implementation needs special code for
+         the 'a' and 'A' directives.])
+      AC_CHECK_FUNCS([nl_langinfo])
+      ;;
+  esac
+])
+
+# Extra prerequisites of lib/vasnprintf.c for supporting the 'F' directive.
+AC_DEFUN([gl_PREREQ_VASNPRINTF_DIRECTIVE_F],
+[
+  AC_REQUIRE([gl_PRINTF_DIRECTIVE_F])
+  case "$gl_cv_func_printf_directive_f" in
+    *yes)
+      ;;
+    *)
+      AC_DEFINE([NEED_PRINTF_DIRECTIVE_F], [1],
+        [Define if the vasnprintf implementation needs special code for
+         the 'F' directive.])
+      ;;
+  esac
+])
+
+# Extra prerequisites of lib/vasnprintf.c for supporting the 'ls' directive.
+AC_DEFUN([gl_PREREQ_VASNPRINTF_DIRECTIVE_LS],
+[
+  AC_REQUIRE([gl_PRINTF_DIRECTIVE_LS])
+  case "$gl_cv_func_printf_directive_ls" in
+    *yes)
+      ;;
+    *)
+      AC_DEFINE([NEED_PRINTF_DIRECTIVE_LS], [1],
+        [Define if the vasnprintf implementation needs special code for
+         the 'ls' directive.])
+      ;;
+  esac
+])
+
+# Extra prerequisites of lib/vasnprintf.c for supporting the ' flag.
+AC_DEFUN([gl_PREREQ_VASNPRINTF_FLAG_GROUPING],
+[
+  AC_REQUIRE([gl_PRINTF_FLAG_GROUPING])
+  case "$gl_cv_func_printf_flag_grouping" in
+    *yes)
+      ;;
+    *)
+      AC_DEFINE([NEED_PRINTF_FLAG_GROUPING], [1],
+        [Define if the vasnprintf implementation needs special code for the
+         ' flag.])
+      ;;
+  esac
+])
+
+# Extra prerequisites of lib/vasnprintf.c for supporting the '-' flag.
+AC_DEFUN([gl_PREREQ_VASNPRINTF_FLAG_LEFTADJUST],
+[
+  AC_REQUIRE([gl_PRINTF_FLAG_LEFTADJUST])
+  case "$gl_cv_func_printf_flag_leftadjust" in
+    *yes)
+      ;;
+    *)
+      AC_DEFINE([NEED_PRINTF_FLAG_LEFTADJUST], [1],
+        [Define if the vasnprintf implementation needs special code for the
+         '-' flag.])
+      ;;
+  esac
+])
+
+# Extra prerequisites of lib/vasnprintf.c for supporting the 0 flag.
+AC_DEFUN([gl_PREREQ_VASNPRINTF_FLAG_ZERO],
+[
+  AC_REQUIRE([gl_PRINTF_FLAG_ZERO])
+  case "$gl_cv_func_printf_flag_zero" in
+    *yes)
+      ;;
+    *)
+      AC_DEFINE([NEED_PRINTF_FLAG_ZERO], [1],
+        [Define if the vasnprintf implementation needs special code for the
+         0 flag.])
+      ;;
+  esac
+])
+
+# Extra prerequisites of lib/vasnprintf.c for supporting large precisions.
+AC_DEFUN([gl_PREREQ_VASNPRINTF_PRECISION],
+[
+  AC_REQUIRE([gl_PRINTF_PRECISION])
+  case "$gl_cv_func_printf_precision" in
+    *yes)
+      ;;
+    *)
+      AC_DEFINE([NEED_PRINTF_UNBOUNDED_PRECISION], [1],
+        [Define if the vasnprintf implementation needs special code for
+         supporting large precisions without arbitrary bounds.])
+      AC_DEFINE([NEED_PRINTF_DOUBLE], [1],
+        [Define if the vasnprintf implementation needs special code for
+         'double' arguments.])
+      AC_DEFINE([NEED_PRINTF_LONG_DOUBLE], [1],
+        [Define if the vasnprintf implementation needs special code for
+         'long double' arguments.])
+      ;;
+  esac
+])
+
+# Extra prerequisites of lib/vasnprintf.c for surviving out-of-memory
+# conditions.
+AC_DEFUN([gl_PREREQ_VASNPRINTF_ENOMEM],
+[
+  AC_REQUIRE([gl_PRINTF_ENOMEM])
+  case "$gl_cv_func_printf_enomem" in
+    *yes)
+      ;;
+    *)
+      AC_DEFINE([NEED_PRINTF_ENOMEM], [1],
+        [Define if the vasnprintf implementation needs special code for
+         surviving out-of-memory conditions.])
+      AC_DEFINE([NEED_PRINTF_DOUBLE], [1],
+        [Define if the vasnprintf implementation needs special code for
+         'double' arguments.])
+      AC_DEFINE([NEED_PRINTF_LONG_DOUBLE], [1],
+        [Define if the vasnprintf implementation needs special code for
+         'long double' arguments.])
+      ;;
+  esac
+])
+
+# Prerequisites of lib/vasnprintf.c including all extras for POSIX compliance.
+AC_DEFUN([gl_PREREQ_VASNPRINTF_WITH_EXTRAS],
+[
+  AC_REQUIRE([gl_PREREQ_VASNPRINTF])
+  gl_PREREQ_VASNPRINTF_LONG_DOUBLE
+  gl_PREREQ_VASNPRINTF_INFINITE_DOUBLE
+  gl_PREREQ_VASNPRINTF_INFINITE_LONG_DOUBLE
+  gl_PREREQ_VASNPRINTF_DIRECTIVE_A
+  gl_PREREQ_VASNPRINTF_DIRECTIVE_F
+  gl_PREREQ_VASNPRINTF_DIRECTIVE_LS
+  gl_PREREQ_VASNPRINTF_FLAG_GROUPING
+  gl_PREREQ_VASNPRINTF_FLAG_LEFTADJUST
+  gl_PREREQ_VASNPRINTF_FLAG_ZERO
+  gl_PREREQ_VASNPRINTF_PRECISION
+  gl_PREREQ_VASNPRINTF_ENOMEM
+])
+
+# Prerequisites of lib/asnprintf.c.
+AC_DEFUN([gl_PREREQ_ASNPRINTF],
+[
+])
diff --git a/src/grep/m4/version-etc.m4 b/src/grep/m4/version-etc.m4
new file mode 100644
index 0000000..ca7fd24
--- /dev/null
+++ b/src/grep/m4/version-etc.m4
@@ -0,0 +1,33 @@
+# version-etc.m4 serial 1
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+dnl $1 - configure flag and define name
+dnl $2 - human readable description
+m4_define([gl_VERSION_ETC_FLAG],
+[dnl
+  AC_ARG_WITH([$1], [AS_HELP_STRING([--with-$1], [$2])],
+    [dnl
+      case $withval in
+        yes|no) ;;
+        *) AC_DEFINE_UNQUOTED(AS_TR_CPP([PACKAGE_$1]), ["$withval"], [$2]) ;;
+      esac
+    ])
+])
+
+AC_DEFUN([gl_VERSION_ETC],
+[dnl
+  gl_VERSION_ETC_FLAG([packager],
+                      [String identifying the packager of this software])
+  gl_VERSION_ETC_FLAG([packager-version],
+                      [Packager-specific version information])
+  gl_VERSION_ETC_FLAG([packager-bug-reports],
+                      [Packager info for bug reports (URL/e-mail/...)])
+  if test "X$with_packager" = "X" && \
+     test "X$with_packager_version$with_packager_bug_reports" != "X"
+  then
+    AC_MSG_ERROR([The --with-packager-{bug-reports,version} options require --with-packager])
+  fi
+])
diff --git a/src/grep/m4/visibility.m4 b/src/grep/m4/visibility.m4
new file mode 100644
index 0000000..d161bd7
--- /dev/null
+++ b/src/grep/m4/visibility.m4
@@ -0,0 +1,82 @@
+# visibility.m4 serial 8
+dnl Copyright (C) 2005, 2008, 2010-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+
+dnl Tests whether the compiler supports the command-line option
+dnl -fvisibility=hidden and the function and variable attributes
+dnl __attribute__((__visibility__("hidden"))) and
+dnl __attribute__((__visibility__("default"))).
+dnl Does *not* test for __visibility__("protected") - which has tricky
+dnl semantics (see the 'vismain' test in glibc) and does not exist e.g. on
+dnl Mac OS X.
+dnl Does *not* test for __visibility__("internal") - which has processor
+dnl dependent semantics.
+dnl Does *not* test for #pragma GCC visibility push(hidden) - which is
+dnl "really only recommended for legacy code".
+dnl Set the variable CFLAG_VISIBILITY.
+dnl Defines and sets the variable HAVE_VISIBILITY.
+
+AC_DEFUN([gl_VISIBILITY],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  CFLAG_VISIBILITY=
+  HAVE_VISIBILITY=0
+  if test -n "$GCC"; then
+    dnl First, check whether -Werror can be added to the command line, or
+    dnl whether it leads to an error because of some other option that the
+    dnl user has put into $CC $CFLAGS $CPPFLAGS.
+    AC_CACHE_CHECK([whether the -Werror option is usable],
+      [gl_cv_cc_vis_werror],
+      [gl_save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -Werror"
+       AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM([[]], [[]])],
+         [gl_cv_cc_vis_werror=yes],
+         [gl_cv_cc_vis_werror=no])
+       CFLAGS="$gl_save_CFLAGS"
+      ])
+    dnl Now check whether visibility declarations are supported.
+    AC_CACHE_CHECK([for simple visibility declarations],
+      [gl_cv_cc_visibility],
+      [gl_save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -fvisibility=hidden"
+       dnl We use the option -Werror and a function dummyfunc, because on some
+       dnl platforms (Cygwin 1.7) the use of -fvisibility triggers a warning
+       dnl "visibility attribute not supported in this configuration; ignored"
+       dnl at the first function definition in every compilation unit, and we
+       dnl don't want to use the option in this case.
+       if test $gl_cv_cc_vis_werror = yes; then
+         CFLAGS="$CFLAGS -Werror"
+       fi
+       AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[extern __attribute__((__visibility__("hidden"))) int hiddenvar;
+              extern __attribute__((__visibility__("default"))) int exportedvar;
+              extern __attribute__((__visibility__("hidden"))) int hiddenfunc (void);
+              extern __attribute__((__visibility__("default"))) int exportedfunc (void);
+              void dummyfunc (void);
+              int hiddenvar;
+              int exportedvar;
+              int hiddenfunc (void) { return 51; }
+              int exportedfunc (void) { return 1225736919; }
+              void dummyfunc (void) {}
+            ]],
+            [[]])],
+         [gl_cv_cc_visibility=yes],
+         [gl_cv_cc_visibility=no])
+       CFLAGS="$gl_save_CFLAGS"
+      ])
+    if test $gl_cv_cc_visibility = yes; then
+      CFLAG_VISIBILITY="-fvisibility=hidden"
+      HAVE_VISIBILITY=1
+    fi
+  fi
+  AC_SUBST([CFLAG_VISIBILITY])
+  AC_SUBST([HAVE_VISIBILITY])
+  AC_DEFINE_UNQUOTED([HAVE_VISIBILITY], [$HAVE_VISIBILITY],
+    [Define to 1 or 0, depending whether the compiler supports simple visibility declarations.])
+])
diff --git a/src/grep/m4/warn-on-use.m4 b/src/grep/m4/warn-on-use.m4
new file mode 100644
index 0000000..04edfe8
--- /dev/null
+++ b/src/grep/m4/warn-on-use.m4
@@ -0,0 +1,49 @@
+# warn-on-use.m4 serial 9
+dnl Copyright (C) 2010-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# gl_WARN_ON_USE_PREPARE(INCLUDES, NAMES)
+# ---------------------------------------
+# If the module 'posixcheck' is in use:
+#
+# For each whitespace-separated element in the list of NAMES, define
+# HAVE_RAW_DECL_name if the function has a declaration among INCLUDES
+# even after being undefined as a macro.
+#
+# See warn-on-use.h for some hints on how to poison function names, as
+# well as ideas on poisoning global variables and macros.  NAMES may
+# include global variables, but remember that only functions work with
+# _GL_WARN_ON_USE.  Typically, INCLUDES only needs to list a single
+# header, but if the replacement header pulls in other headers because
+# some systems declare functions in the wrong header, then INCLUDES
+# should do likewise.
+#
+# It is generally safe to assume declarations for functions declared
+# in the intersection of C89 and C11 (such as printf) without
+# needing gl_WARN_ON_USE_PREPARE.
+AC_DEFUN([gl_WARN_ON_USE_PREPARE],
+[
+  m4_ifdef([gl_POSIXCHECK],
+    [m4_foreach_w([gl_decl], [$2],
+       [AH_TEMPLATE([HAVE_RAW_DECL_]AS_TR_CPP(m4_defn([gl_decl])),
+         [Define to 1 if ]m4_defn([gl_decl])[ is declared even after
+          undefining macros.])])dnl
+     for gl_func in m4_flatten([$2]); do
+       AS_VAR_PUSHDEF([gl_Symbol], [gl_cv_have_raw_decl_$gl_func])dnl
+       AC_CACHE_CHECK([whether $gl_func is declared without a macro],
+         [gl_Symbol],
+         [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$1],
+[[#undef $gl_func
+  (void) $gl_func;]])],
+           [AS_VAR_SET([gl_Symbol], [yes])], [AS_VAR_SET([gl_Symbol], [no])])])
+       AS_VAR_IF([gl_Symbol], [yes],
+         [AC_DEFINE_UNQUOTED(AS_TR_CPP([HAVE_RAW_DECL_$gl_func]), [1])
+          dnl shortcut - if the raw declaration exists, then set a cache
+          dnl variable to allow skipping any later AC_CHECK_DECL efforts
+          eval ac_cv_have_decl_$gl_func=yes])
+       AS_VAR_POPDEF([gl_Symbol])dnl
+     done
+    ])
+])
diff --git a/src/grep/m4/warnings.m4 b/src/grep/m4/warnings.m4
new file mode 100644
index 0000000..9e24d89
--- /dev/null
+++ b/src/grep/m4/warnings.m4
@@ -0,0 +1,110 @@
+# warnings.m4 serial 16
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Simon Josefsson
+
+# gl_AS_VAR_APPEND(VAR, VALUE)
+# ----------------------------
+# Provide the functionality of AS_VAR_APPEND if Autoconf does not have it.
+m4_ifdef([AS_VAR_APPEND],
+[m4_copy([AS_VAR_APPEND], [gl_AS_VAR_APPEND])],
+[m4_define([gl_AS_VAR_APPEND],
+[AS_VAR_SET([$1], [AS_VAR_GET([$1])$2])])])
+
+
+# gl_COMPILER_OPTION_IF(OPTION, [IF-SUPPORTED], [IF-NOT-SUPPORTED],
+#                       [PROGRAM = AC_LANG_PROGRAM()])
+# -----------------------------------------------------------------
+# Check if the compiler supports OPTION when compiling PROGRAM.
+#
+# The effects of this macro depend on the current language (_AC_LANG).
+AC_DEFUN([gl_COMPILER_OPTION_IF],
+[
+AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_[]_AC_LANG_ABBREV[]_$1])dnl
+AS_VAR_PUSHDEF([gl_Flags], [_AC_LANG_PREFIX[]FLAGS])dnl
+AS_LITERAL_IF([$1],
+  [m4_pushdef([gl_Positive], m4_bpatsubst([$1], [^-Wno-], [-W]))],
+  [gl_positive="$1"
+case $gl_positive in
+  -Wno-*) gl_positive=-W`expr "X$gl_positive" : 'X-Wno-\(.*\)'` ;;
+esac
+m4_pushdef([gl_Positive], [$gl_positive])])dnl
+AC_CACHE_CHECK([whether _AC_LANG compiler handles $1], [gl_Warn], [
+  gl_save_compiler_FLAGS="$gl_Flags"
+  gl_AS_VAR_APPEND(m4_defn([gl_Flags]),
+    [" $gl_unknown_warnings_are_errors ]m4_defn([gl_Positive])["])
+  AC_LINK_IFELSE([m4_default([$4], [AC_LANG_PROGRAM([[]])])],
+                 [AS_VAR_SET([gl_Warn], [yes])],
+                 [AS_VAR_SET([gl_Warn], [no])])
+  gl_Flags="$gl_save_compiler_FLAGS"
+])
+AS_VAR_IF(gl_Warn, [yes], [$2], [$3])
+m4_popdef([gl_Positive])dnl
+AS_VAR_POPDEF([gl_Flags])dnl
+AS_VAR_POPDEF([gl_Warn])dnl
+])
+
+# gl_UNKNOWN_WARNINGS_ARE_ERRORS
+# ------------------------------
+# Clang doesn't complain about unknown warning options unless one also
+# specifies -Wunknown-warning-option -Werror.  Detect this.
+#
+# The effects of this macro depend on the current language (_AC_LANG).
+AC_DEFUN([gl_UNKNOWN_WARNINGS_ARE_ERRORS],
+[_AC_LANG_DISPATCH([$0], _AC_LANG, $@)])
+
+# Specialization for _AC_LANG = C. This macro can be AC_REQUIREd.
+AC_DEFUN([gl_UNKNOWN_WARNINGS_ARE_ERRORS(C)],
+[
+  AC_LANG_PUSH([C])
+  gl_UNKNOWN_WARNINGS_ARE_ERRORS_IMPL
+  AC_LANG_POP([C])
+])
+
+# Specialization for _AC_LANG = C++. This macro can be AC_REQUIREd.
+AC_DEFUN([gl_UNKNOWN_WARNINGS_ARE_ERRORS(C++)],
+[
+  AC_LANG_PUSH([C++])
+  gl_UNKNOWN_WARNINGS_ARE_ERRORS_IMPL
+  AC_LANG_POP([C++])
+])
+
+# Specialization for _AC_LANG = Objective C. This macro can be AC_REQUIREd.
+AC_DEFUN([gl_UNKNOWN_WARNINGS_ARE_ERRORS(Objective C)],
+[
+  AC_LANG_PUSH([Objective C])
+  gl_UNKNOWN_WARNINGS_ARE_ERRORS_IMPL
+  AC_LANG_POP([Objective C])
+])
+
+AC_DEFUN([gl_UNKNOWN_WARNINGS_ARE_ERRORS_IMPL],
+[gl_COMPILER_OPTION_IF([-Werror -Wunknown-warning-option],
+   [gl_unknown_warnings_are_errors='-Wunknown-warning-option -Werror'],
+   [gl_unknown_warnings_are_errors=])])
+
+# gl_WARN_ADD(OPTION, [VARIABLE = WARN_CFLAGS/WARN_CXXFLAGS],
+#             [PROGRAM = AC_LANG_PROGRAM()])
+# -----------------------------------------------------------
+# Adds parameter to WARN_CFLAGS/WARN_CXXFLAGS if the compiler supports it
+# when compiling PROGRAM.  For example, gl_WARN_ADD([-Wparentheses]).
+#
+# If VARIABLE is a variable name, AC_SUBST it.
+#
+# The effects of this macro depend on the current language (_AC_LANG).
+AC_DEFUN([gl_WARN_ADD],
+[AC_REQUIRE([gl_UNKNOWN_WARNINGS_ARE_ERRORS(]_AC_LANG[)])
+gl_COMPILER_OPTION_IF([$1],
+  [gl_AS_VAR_APPEND(m4_if([$2], [], [[WARN_]_AC_LANG_PREFIX[FLAGS]], [[$2]]), [" $1"])],
+  [],
+  [$3])
+m4_ifval([$2],
+         [AS_LITERAL_IF([$2], [AC_SUBST([$2])])],
+         [AC_SUBST([WARN_]_AC_LANG_PREFIX[FLAGS])])dnl
+])
+
+# Local Variables:
+# mode: autoconf
+# End:
diff --git a/src/grep/m4/wchar_h.m4 b/src/grep/m4/wchar_h.m4
new file mode 100644
index 0000000..818b319
--- /dev/null
+++ b/src/grep/m4/wchar_h.m4
@@ -0,0 +1,255 @@
+dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues.
+
+dnl Copyright (C) 2007-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Written by Eric Blake.
+
+# wchar_h.m4 serial 53
+
+AC_DEFUN_ONCE([gl_WCHAR_H],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+  AC_REQUIRE([gl_WCHAR_H_INLINE_OK])
+  dnl Prepare for creating substitute <wchar.h>.
+  dnl Check for <wchar.h> (missing in Linux uClibc when built without wide
+  dnl character support).
+  dnl <wchar.h> is always overridden, because of GNULIB_POSIXCHECK.
+  gl_CHECK_NEXT_HEADERS([wchar.h])
+  if test $ac_cv_header_wchar_h = yes; then
+    HAVE_WCHAR_H=1
+  else
+    HAVE_WCHAR_H=0
+  fi
+  AC_SUBST([HAVE_WCHAR_H])
+
+  AC_REQUIRE([gl_FEATURES_H])
+
+  AC_REQUIRE([gt_TYPE_WINT_T])
+  if test $gt_cv_c_wint_t = yes; then
+    HAVE_WINT_T=1
+  else
+    HAVE_WINT_T=0
+  fi
+  AC_SUBST([HAVE_WINT_T])
+
+  AC_REQUIRE([gl_TYPE_WINT_T_PREREQ])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[
+      #include <wchar.h>
+    ]],
+    [btowc wctob mbsinit mbrtowc mbrlen mbsrtowcs mbsnrtowcs wcrtomb
+     wcsrtombs wcsnrtombs wcwidth
+     wmemchr wmemcmp wmemcpy wmemmove wmempcpy wmemset
+     wcslen wcsnlen wcscpy wcpcpy wcsncpy wcpncpy wcscat wcsncat wcscmp
+     wcsncmp wcscasecmp wcsncasecmp wcscoll wcsxfrm wcsdup wcschr wcsrchr
+     wcscspn wcsspn wcspbrk wcsstr wcstok wcswidth wcsftime
+    ])
+
+  AC_REQUIRE([AC_C_RESTRICT])
+
+  AC_CHECK_DECLS([wcsdup], [], [], [[
+      #include <wchar.h>
+    ]])
+  if test $ac_cv_have_decl_wcsdup = no; then
+    HAVE_DECL_WCSDUP=0
+  fi
+])
+
+dnl Check whether <wchar.h> is usable at all.
+AC_DEFUN([gl_WCHAR_H_INLINE_OK],
+[
+  dnl Test whether <wchar.h> suffers due to the transition from '__inline' to
+  dnl 'gnu_inline'. See <https://sourceware.org/bugzilla/show_bug.cgi?id=4022>
+  dnl and <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42440>. In summary,
+  dnl glibc version 2.5 or older, together with gcc version 4.3 or newer and
+  dnl the option -std=c99 or -std=gnu99, leads to a broken <wchar.h>.
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CACHE_CHECK([whether <wchar.h> uses 'inline' correctly],
+    [gl_cv_header_wchar_h_correct_inline],
+    [gl_cv_header_wchar_h_correct_inline=yes
+     case "$host_os" in
+       *-gnu* | gnu*)
+         AC_LANG_CONFTEST([
+           AC_LANG_SOURCE([[
+             #define wcstod renamed_wcstod
+             #include <wchar.h>
+             extern int zero (void);
+             int main () { return zero(); }
+           ]])])
+         dnl Do not rename the object file from conftest.$ac_objext to
+         dnl conftest1.$ac_objext, as this will cause the link to fail on
+         dnl z/OS when using the XPLINK object format (due to duplicate
+         dnl CSECT names). Instead, temporarily redefine $ac_compile so
+         dnl that the object file has the latter name from the start.
+         save_ac_compile="$ac_compile"
+         ac_compile=`echo "$save_ac_compile" | sed s/conftest/conftest1/`
+         if echo '#include "conftest.c"' >conftest1.c \
+            && AC_TRY_EVAL([ac_compile]); then
+           AC_LANG_CONFTEST([
+             AC_LANG_SOURCE([[
+               #define wcstod renamed_wcstod
+               #include <wchar.h>
+               int zero (void) { return 0; }
+             ]])])
+           dnl See note above about renaming object files.
+           ac_compile=`echo "$save_ac_compile" | sed s/conftest/conftest2/`
+           if echo '#include "conftest.c"' >conftest2.c \
+              && AC_TRY_EVAL([ac_compile]); then
+             if $CC -o conftest$ac_exeext $CFLAGS $LDFLAGS conftest1.$ac_objext conftest2.$ac_objext $LIBS >&AS_MESSAGE_LOG_FD 2>&1; then
+               :
+             else
+               gl_cv_header_wchar_h_correct_inline=no
+             fi
+           fi
+         fi
+         ac_compile="$save_ac_compile"
+         rm -f conftest[12].c conftest[12].$ac_objext conftest$ac_exeext
+         ;;
+     esac
+    ])
+  if test $gl_cv_header_wchar_h_correct_inline = no; then
+    AC_MSG_ERROR([<wchar.h> cannot be used with this compiler ($CC $CFLAGS $CPPFLAGS).
+This is a known interoperability problem of glibc <= 2.5 with gcc >= 4.3 in
+C99 mode. You have four options:
+  - Add the flag -fgnu89-inline to CC and reconfigure, or
+  - Fix your include files, using parts of
+    <https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=b037a293a48718af30d706c2e18c929d0e69a621>, or
+  - Use a gcc version older than 4.3, or
+  - Don't use the flags -std=c99 or -std=gnu99.
+Configuration aborted.])
+  fi
+])
+
+# gl_WCHAR_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_WCHAR_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_WCHAR_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_WCHAR_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_WCHAR_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_BTOWC])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCTOB])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSINIT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBRTOWC])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBRLEN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSRTOWCS])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSNRTOWCS])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCRTOMB])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSRTOMBS])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSNRTOMBS])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCWIDTH])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WMEMCHR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WMEMCMP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WMEMCPY])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WMEMMOVE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WMEMPCPY])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WMEMSET])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSLEN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSNLEN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSCPY])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCPCPY])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSNCPY])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCPNCPY])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSCAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSNCAT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSCMP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSNCMP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSCASECMP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSNCASECMP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSCOLL])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSXFRM])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSDUP])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSCHR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSRCHR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSCSPN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSSPN])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSPBRK])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSSTR])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSTOK])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSWIDTH])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSFTIME])
+    dnl Support Microsoft deprecated alias function names by default.
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_WCSDUP], [1])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_WCHAR_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_WCHAR_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_BTOWC=1;         AC_SUBST([HAVE_BTOWC])
+  HAVE_MBSINIT=1;       AC_SUBST([HAVE_MBSINIT])
+  HAVE_MBRTOWC=1;       AC_SUBST([HAVE_MBRTOWC])
+  HAVE_MBRLEN=1;        AC_SUBST([HAVE_MBRLEN])
+  HAVE_MBSRTOWCS=1;     AC_SUBST([HAVE_MBSRTOWCS])
+  HAVE_MBSNRTOWCS=1;    AC_SUBST([HAVE_MBSNRTOWCS])
+  HAVE_WCRTOMB=1;       AC_SUBST([HAVE_WCRTOMB])
+  HAVE_WCSRTOMBS=1;     AC_SUBST([HAVE_WCSRTOMBS])
+  HAVE_WCSNRTOMBS=1;    AC_SUBST([HAVE_WCSNRTOMBS])
+  HAVE_WMEMCHR=1;       AC_SUBST([HAVE_WMEMCHR])
+  HAVE_WMEMCMP=1;       AC_SUBST([HAVE_WMEMCMP])
+  HAVE_WMEMCPY=1;       AC_SUBST([HAVE_WMEMCPY])
+  HAVE_WMEMMOVE=1;      AC_SUBST([HAVE_WMEMMOVE])
+  HAVE_WMEMPCPY=1;      AC_SUBST([HAVE_WMEMPCPY])
+  HAVE_WMEMSET=1;       AC_SUBST([HAVE_WMEMSET])
+  HAVE_WCSLEN=1;        AC_SUBST([HAVE_WCSLEN])
+  HAVE_WCSNLEN=1;       AC_SUBST([HAVE_WCSNLEN])
+  HAVE_WCSCPY=1;        AC_SUBST([HAVE_WCSCPY])
+  HAVE_WCPCPY=1;        AC_SUBST([HAVE_WCPCPY])
+  HAVE_WCSNCPY=1;       AC_SUBST([HAVE_WCSNCPY])
+  HAVE_WCPNCPY=1;       AC_SUBST([HAVE_WCPNCPY])
+  HAVE_WCSCAT=1;        AC_SUBST([HAVE_WCSCAT])
+  HAVE_WCSNCAT=1;       AC_SUBST([HAVE_WCSNCAT])
+  HAVE_WCSCMP=1;        AC_SUBST([HAVE_WCSCMP])
+  HAVE_WCSNCMP=1;       AC_SUBST([HAVE_WCSNCMP])
+  HAVE_WCSCASECMP=1;    AC_SUBST([HAVE_WCSCASECMP])
+  HAVE_WCSNCASECMP=1;   AC_SUBST([HAVE_WCSNCASECMP])
+  HAVE_WCSCOLL=1;       AC_SUBST([HAVE_WCSCOLL])
+  HAVE_WCSXFRM=1;       AC_SUBST([HAVE_WCSXFRM])
+  HAVE_WCSDUP=1;        AC_SUBST([HAVE_WCSDUP])
+  HAVE_WCSCHR=1;        AC_SUBST([HAVE_WCSCHR])
+  HAVE_WCSRCHR=1;       AC_SUBST([HAVE_WCSRCHR])
+  HAVE_WCSCSPN=1;       AC_SUBST([HAVE_WCSCSPN])
+  HAVE_WCSSPN=1;        AC_SUBST([HAVE_WCSSPN])
+  HAVE_WCSPBRK=1;       AC_SUBST([HAVE_WCSPBRK])
+  HAVE_WCSSTR=1;        AC_SUBST([HAVE_WCSSTR])
+  HAVE_WCSTOK=1;        AC_SUBST([HAVE_WCSTOK])
+  HAVE_WCSWIDTH=1;      AC_SUBST([HAVE_WCSWIDTH])
+  HAVE_WCSFTIME=1;      AC_SUBST([HAVE_WCSFTIME])
+  HAVE_DECL_WCTOB=1;    AC_SUBST([HAVE_DECL_WCTOB])
+  HAVE_DECL_WCSDUP=1;   AC_SUBST([HAVE_DECL_WCSDUP])
+  HAVE_DECL_WCWIDTH=1;  AC_SUBST([HAVE_DECL_WCWIDTH])
+  REPLACE_MBSTATE_T=0;  AC_SUBST([REPLACE_MBSTATE_T])
+  REPLACE_BTOWC=0;      AC_SUBST([REPLACE_BTOWC])
+  REPLACE_WCTOB=0;      AC_SUBST([REPLACE_WCTOB])
+  REPLACE_MBSINIT=0;    AC_SUBST([REPLACE_MBSINIT])
+  REPLACE_MBRTOWC=0;    AC_SUBST([REPLACE_MBRTOWC])
+  REPLACE_MBRLEN=0;     AC_SUBST([REPLACE_MBRLEN])
+  REPLACE_MBSRTOWCS=0;  AC_SUBST([REPLACE_MBSRTOWCS])
+  REPLACE_MBSNRTOWCS=0; AC_SUBST([REPLACE_MBSNRTOWCS])
+  REPLACE_WCRTOMB=0;    AC_SUBST([REPLACE_WCRTOMB])
+  REPLACE_WCSRTOMBS=0;  AC_SUBST([REPLACE_WCSRTOMBS])
+  REPLACE_WCSNRTOMBS=0; AC_SUBST([REPLACE_WCSNRTOMBS])
+  REPLACE_WCWIDTH=0;    AC_SUBST([REPLACE_WCWIDTH])
+  REPLACE_WCSWIDTH=0;   AC_SUBST([REPLACE_WCSWIDTH])
+  REPLACE_WCSFTIME=0;   AC_SUBST([REPLACE_WCSFTIME])
+  REPLACE_WCSTOK=0;     AC_SUBST([REPLACE_WCSTOK])
+])
diff --git a/src/grep/m4/wchar_t.m4 b/src/grep/m4/wchar_t.m4
new file mode 100644
index 0000000..34db10e
--- /dev/null
+++ b/src/grep/m4/wchar_t.m4
@@ -0,0 +1,24 @@
+# wchar_t.m4 serial 4 (gettext-0.18.2)
+dnl Copyright (C) 2002-2003, 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+dnl Test whether <stddef.h> has the 'wchar_t' type.
+dnl Prerequisite: AC_PROG_CC
+
+AC_DEFUN([gt_TYPE_WCHAR_T],
+[
+  AC_CACHE_CHECK([for wchar_t], [gt_cv_c_wchar_t],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <stddef.h>
+            wchar_t foo = (wchar_t)'\0';]],
+          [[]])],
+       [gt_cv_c_wchar_t=yes],
+       [gt_cv_c_wchar_t=no])])
+  if test $gt_cv_c_wchar_t = yes; then
+    AC_DEFINE([HAVE_WCHAR_T], [1], [Define if you have the 'wchar_t' type.])
+  fi
+])
diff --git a/src/grep/m4/wcrtomb.m4 b/src/grep/m4/wcrtomb.m4
new file mode 100644
index 0000000..cd96f11
--- /dev/null
+++ b/src/grep/m4/wcrtomb.m4
@@ -0,0 +1,146 @@
+# wcrtomb.m4 serial 17
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_WCRTOMB],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+
+  AC_REQUIRE([AC_TYPE_MBSTATE_T])
+  gl_MBSTATE_T_BROKEN
+
+  AC_CHECK_FUNCS_ONCE([wcrtomb])
+  if test $ac_cv_func_wcrtomb = no; then
+    HAVE_WCRTOMB=0
+    AC_CHECK_DECLS([wcrtomb],,, [[
+      #include <wchar.h>
+    ]])
+    if test $ac_cv_have_decl_wcrtomb = yes; then
+      dnl On Minix 3.1.8, the system's <wchar.h> declares wcrtomb() although
+      dnl it does not have the function. Avoid a collision with gnulib's
+      dnl replacement.
+      REPLACE_WCRTOMB=1
+    fi
+  else
+    dnl We don't actually need to override wcrtomb when redefining the semantics
+    dnl of the mbstate_t type. Tested on 32-bit AIX.
+    dnl if test $REPLACE_MBSTATE_T = 1; then
+    dnl   REPLACE_WCRTOMB=1
+    dnl fi
+    if test $REPLACE_WCRTOMB = 0; then
+      dnl On Android 4.3, wcrtomb produces wrong characters in the C locale.
+      dnl On AIX 4.3, OSF/1 5.1 and Solaris <= 11.3, wcrtomb (NULL, 0, NULL)
+      dnl sometimes returns 0 instead of 1.
+      AC_REQUIRE([AC_PROG_CC])
+      AC_REQUIRE([gt_LOCALE_FR])
+      AC_REQUIRE([gt_LOCALE_FR_UTF8])
+      AC_REQUIRE([gt_LOCALE_JA])
+      AC_REQUIRE([gt_LOCALE_ZH_CN])
+      AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+      AC_CACHE_CHECK([whether wcrtomb works in the C locale],
+        [gl_cv_func_wcrtomb_works],
+        [AC_RUN_IFELSE(
+           [AC_LANG_SOURCE([[
+#include <string.h>
+#include <stdlib.h>
+#include <wchar.h>
+int main ()
+{
+  mbstate_t state;
+  char out[64];
+  int count;
+  memset (&state, 0, sizeof (state));
+  out[0] = 'x';
+  count = wcrtomb (out, L'a', &state);
+  return !(count == 1 && out[0] == 'a');
+}]])],
+           [gl_cv_func_wcrtomb_works=yes],
+           [gl_cv_func_wcrtomb_works=no],
+           [case "$host_os" in
+                               # Guess no on Android.
+              linux*-android*) gl_cv_func_wcrtomb_works="guessing no";;
+                               # Guess yes otherwise.
+              *)               gl_cv_func_wcrtomb_works="guessing yes";;
+            esac
+           ])
+        ])
+      case "$gl_cv_func_wcrtomb_works" in
+        *yes) ;;
+        *) AC_DEFINE([WCRTOMB_C_LOCALE_BUG], [1],
+             [Define if the wcrtomb function does not work in the C locale.])
+           REPLACE_WCRTOMB=1 ;;
+      esac
+    fi
+    if test $REPLACE_WCRTOMB = 0; then
+      AC_CACHE_CHECK([whether wcrtomb return value is correct],
+        [gl_cv_func_wcrtomb_retval],
+        [
+          dnl Initial guess, used when cross-compiling or when no suitable locale
+          dnl is present.
+changequote(,)dnl
+          case "$host_os" in
+            # Guess no on AIX 4, OSF/1, Solaris, native Windows.
+            aix4* | osf* | solaris* | mingw*) gl_cv_func_wcrtomb_retval="guessing no" ;;
+            # Guess yes otherwise.
+            *)                                gl_cv_func_wcrtomb_retval="guessing yes" ;;
+          esac
+changequote([,])dnl
+          if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then
+            AC_RUN_IFELSE(
+              [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+#include <stdlib.h>
+int main ()
+{
+  int result = 0;
+  if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
+    {
+      if (wcrtomb (NULL, 0, NULL) != 1)
+        result |= 1;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      if (wcrtomb (NULL, 0, NULL) != 1)
+        result |= 2;
+      {
+        wchar_t wc = (wchar_t) 0xBADFACE;
+        if (mbtowc (&wc, "\303\274", 2) == 2)
+          if (wcrtomb (NULL, wc, NULL) != 1)
+            result |= 2;
+      }
+    }
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      if (wcrtomb (NULL, 0, NULL) != 1)
+        result |= 4;
+    }
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      if (wcrtomb (NULL, 0, NULL) != 1)
+        result |= 8;
+    }
+  return result;
+}]])],
+              [gl_cv_func_wcrtomb_retval=yes],
+              [gl_cv_func_wcrtomb_retval=no],
+              [:])
+          fi
+        ])
+      case "$gl_cv_func_wcrtomb_retval" in
+        *yes) ;;
+        *) AC_DEFINE([WCRTOMB_RETVAL_BUG], [1],
+             [Define if the wcrtomb function has an incorrect return value.])
+           REPLACE_WCRTOMB=1 ;;
+      esac
+    fi
+  fi
+])
+
+# Prerequisites of lib/wcrtomb.c.
+AC_DEFUN([gl_PREREQ_WCRTOMB], [
+  :
+])
diff --git a/src/grep/m4/wctob.m4 b/src/grep/m4/wctob.m4
new file mode 100644
index 0000000..159b609
--- /dev/null
+++ b/src/grep/m4/wctob.m4
@@ -0,0 +1,109 @@
+# wctob.m4 serial 13
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_WCTOB],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+
+  AC_CHECK_FUNCS_ONCE([wctob])
+  if test $ac_cv_func_wctob = no; then
+    HAVE_WCTOB=0
+    HAVE_DECL_WCTOB=0
+  else
+    HAVE_WCTOB=1
+
+    dnl Solaris 9 has the wctob() function but it does not work.
+    dnl Cygwin 1.7.2 has the wctob() function but it clobbers caller-owned
+    dnl registers, see <https://cygwin.com/ml/cygwin/2010-05/msg00015.html>.
+    AC_REQUIRE([AC_PROG_CC])
+    AC_REQUIRE([gt_LOCALE_FR])
+    AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+    AC_CACHE_CHECK([whether wctob works],
+      [gl_cv_func_wctob_works],
+      [
+        dnl Initial guess, used when cross-compiling or when no suitable locale
+        dnl is present.
+changequote(,)dnl
+        case "$host_os" in
+            # Guess no on Solaris <= 9 and Cygwin.
+          solaris2.[1-9] | solaris2.[1-9].* | cygwin*)
+            gl_cv_func_wctob_works="guessing no" ;;
+            # Guess no on native Windows.
+          mingw*)
+            gl_cv_func_wctob_works="guessing no" ;;
+            # Guess yes otherwise.
+          *) gl_cv_func_wctob_works="guessing yes" ;;
+        esac
+changequote([,])dnl
+        case "$host_os" in
+          cygwin*)
+            AC_RUN_IFELSE(
+              [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <wchar.h>
+
+register long global __asm__ ("%ebx");
+
+int main ()
+{
+  setlocale (LC_ALL, "en_US.UTF-8");
+
+  global = 0x12345678;
+  if (wctob (0x00FC) != -1)
+    return 1;
+  if (global != 0x12345678)
+    return 2;
+  return 0;
+}]])],
+              [:],
+              [gl_cv_func_wctob_works=no],
+              [:])
+            ;;
+        esac
+        if test "$gl_cv_func_wctob_works" != no && test $LOCALE_FR != none; then
+          AC_RUN_IFELSE(
+            [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <stdlib.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
+    {
+      wchar_t wc;
+
+      if (mbtowc (&wc, "\374", 1) == 1)
+        if (wctob (wc) != (unsigned char) '\374')
+          return 1;
+    }
+  return 0;
+}]])],
+            [gl_cv_func_wctob_works=yes],
+            [gl_cv_func_wctob_works=no],
+            [:])
+        fi
+      ])
+    case "$gl_cv_func_wctob_works" in
+      *yes) ;;
+      *) REPLACE_WCTOB=1 ;;
+    esac
+    if test $REPLACE_WCTOB = 0; then
+
+      dnl IRIX 6.5 has the wctob() function but does not declare it.
+      AC_CHECK_DECLS([wctob], [], [], [[
+        #include <wchar.h>
+      ]])
+      if test $ac_cv_have_decl_wctob != yes; then
+        HAVE_DECL_WCTOB=0
+      fi
+    fi
+  fi
+])
+
+# Prerequisites of lib/wctob.c.
+AC_DEFUN([gl_PREREQ_WCTOB], [
+  :
+])
diff --git a/src/grep/m4/wctomb.m4 b/src/grep/m4/wctomb.m4
new file mode 100644
index 0000000..2da8b26
--- /dev/null
+++ b/src/grep/m4/wctomb.m4
@@ -0,0 +1,19 @@
+# wctomb.m4 serial 2
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_WCTOMB],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+
+  if false; then
+    REPLACE_WCTOMB=1
+  fi
+])
+
+# Prerequisites of lib/wctomb.c.
+AC_DEFUN([gl_PREREQ_WCTOMB], [
+  :
+])
diff --git a/src/grep/m4/wctype_h.m4 b/src/grep/m4/wctype_h.m4
new file mode 100644
index 0000000..7d74212
--- /dev/null
+++ b/src/grep/m4/wctype_h.m4
@@ -0,0 +1,200 @@
+# wctype_h.m4 serial 30
+
+dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it.
+
+dnl Copyright (C) 2006-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Written by Paul Eggert.
+
+AC_DEFUN_ONCE([gl_WCTYPE_H],
+[
+  AC_REQUIRE([gl_WCTYPE_H_DEFAULTS])
+  AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CHECK_FUNCS_ONCE([iswcntrl])
+  if test $ac_cv_func_iswcntrl = yes; then
+    HAVE_ISWCNTRL=1
+  else
+    HAVE_ISWCNTRL=0
+  fi
+  AC_SUBST([HAVE_ISWCNTRL])
+
+  AC_REQUIRE([gt_TYPE_WINT_T])
+  if test $gt_cv_c_wint_t = yes; then
+    HAVE_WINT_T=1
+  else
+    HAVE_WINT_T=0
+  fi
+  AC_SUBST([HAVE_WINT_T])
+
+  AC_REQUIRE([gl_TYPE_WINT_T_PREREQ])
+
+  gl_CHECK_NEXT_HEADERS([wctype.h])
+  if test $ac_cv_header_wctype_h = yes; then
+    if test $ac_cv_func_iswcntrl = yes; then
+      dnl Linux libc5 has an iswprint function that returns 0 for all arguments.
+      dnl The other functions are likely broken in the same way.
+      AC_CACHE_CHECK([whether iswcntrl works], [gl_cv_func_iswcntrl_works],
+        [
+          AC_RUN_IFELSE(
+            [AC_LANG_SOURCE([[
+               #include <wchar.h>
+               #include <wctype.h>
+               int main () { return iswprint ('x') == 0; }
+            ]])],
+            [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no],
+            [dnl Guess no on Linux libc5, yes otherwise.
+             AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h>
+                          #if __GNU_LIBRARY__ == 1
+                          Linux libc5 i18n is broken.
+                          #endif]], [[]])],
+              [gl_cv_func_iswcntrl_works="guessing yes"],
+              [gl_cv_func_iswcntrl_works="guessing no"])
+            ])
+        ])
+    fi
+    HAVE_WCTYPE_H=1
+  else
+    HAVE_WCTYPE_H=0
+  fi
+  AC_SUBST([HAVE_WCTYPE_H])
+
+  if test $GNULIBHEADERS_OVERRIDE_WINT_T = 1; then
+    REPLACE_ISWCNTRL=1
+  else
+    case "$gl_cv_func_iswcntrl_works" in
+      *yes) REPLACE_ISWCNTRL=0 ;;
+      *)    REPLACE_ISWCNTRL=1 ;;
+    esac
+  fi
+  AC_SUBST([REPLACE_ISWCNTRL])
+
+  if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
+    dnl Redefine all of iswcntrl, ..., iswxdigit in <wctype.h>.
+    :
+  fi
+
+  if test $REPLACE_ISWCNTRL = 1; then
+    REPLACE_TOWLOWER=1
+  else
+    AC_CHECK_FUNCS([towlower])
+    if test $ac_cv_func_towlower = yes; then
+      REPLACE_TOWLOWER=0
+    else
+      AC_CHECK_DECLS([towlower],,,
+        [[#include <wchar.h>
+          #if HAVE_WCTYPE_H
+          # include <wctype.h>
+          #endif
+        ]])
+      if test $ac_cv_have_decl_towlower = yes; then
+        dnl On Minix 3.1.8, the system's <wctype.h> declares towlower() and
+        dnl towupper() although it does not have the functions. Avoid a
+        dnl collision with gnulib's replacement.
+        REPLACE_TOWLOWER=1
+      else
+        REPLACE_TOWLOWER=0
+      fi
+    fi
+  fi
+  AC_SUBST([REPLACE_TOWLOWER])
+
+  if test $HAVE_ISWCNTRL = 0 || test $REPLACE_TOWLOWER = 1; then
+    dnl Redefine towlower, towupper in <wctype.h>.
+    :
+  fi
+
+  dnl We assume that the wctype() and iswctype() functions exist if and only
+  dnl if the type wctype_t is defined in <wchar.h> or in <wctype.h> if that
+  dnl exists.
+  dnl HP-UX 11.00 declares all these in <wchar.h> and lacks <wctype.h>.
+  AC_CACHE_CHECK([for wctype_t], [gl_cv_type_wctype_t],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <wchar.h>
+            #if HAVE_WCTYPE_H
+            # include <wctype.h>
+            #endif
+            wctype_t a;
+          ]],
+          [[]])],
+       [gl_cv_type_wctype_t=yes],
+       [gl_cv_type_wctype_t=no])
+    ])
+  if test $gl_cv_type_wctype_t = no; then
+    HAVE_WCTYPE_T=0
+  fi
+
+  dnl We assume that the wctrans() and towctrans() functions exist if and only
+  dnl if the type wctrans_t is defined in <wctype.h>.
+  AC_CACHE_CHECK([for wctrans_t], [gl_cv_type_wctrans_t],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <wchar.h>
+            #include <wctype.h>
+            wctrans_t a;
+          ]],
+          [[]])],
+       [gl_cv_type_wctrans_t=yes],
+       [gl_cv_type_wctrans_t=no])
+    ])
+  if test $gl_cv_type_wctrans_t = no; then
+    HAVE_WCTRANS_T=0
+  fi
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[
+#if !(defined __GLIBC__ && !defined __UCLIBC__)
+# include <wchar.h>
+#endif
+#include <wctype.h>
+    ]],
+    [wctype iswctype wctrans towctrans
+    ])
+])
+
+# gl_WCTYPE_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_WCTYPE_MODULE_INDICATOR],
+[
+  dnl Ensure to expand the default settings once only.
+  gl_WCTYPE_H_REQUIRE_DEFAULTS
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd.  It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_WCTYPE_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_WCTYPE_H_MODULE_INDICATOR_DEFAULTS], [
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISWBLANK])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISWDIGIT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISWXDIGIT])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCTYPE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISWCTYPE])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCTRANS])
+    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TOWCTRANS])
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_WCTYPE_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_WCTYPE_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_WCTYPE_H_DEFAULTS],
+[
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_ISWBLANK=1;      AC_SUBST([HAVE_ISWBLANK])
+  HAVE_WCTYPE_T=1;      AC_SUBST([HAVE_WCTYPE_T])
+  HAVE_WCTRANS_T=1;     AC_SUBST([HAVE_WCTRANS_T])
+  REPLACE_ISWBLANK=0;   AC_SUBST([REPLACE_ISWBLANK])
+  REPLACE_ISWDIGIT=0;   AC_SUBST([REPLACE_ISWDIGIT])
+  REPLACE_ISWXDIGIT=0;  AC_SUBST([REPLACE_ISWXDIGIT])
+])
diff --git a/src/grep/m4/wcwidth.m4 b/src/grep/m4/wcwidth.m4
new file mode 100644
index 0000000..2ac2a51
--- /dev/null
+++ b/src/grep/m4/wcwidth.m4
@@ -0,0 +1,115 @@
+# wcwidth.m4 serial 34
+dnl Copyright (C) 2006-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_WCWIDTH],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+  dnl Persuade glibc <wchar.h> to declare wcwidth().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_REQUIRE([gt_TYPE_WCHAR_T])
+  AC_REQUIRE([gt_TYPE_WINT_T])
+
+  AC_CHECK_HEADERS_ONCE([wchar.h])
+  AC_CHECK_FUNCS_ONCE([wcwidth])
+
+  AC_CHECK_DECLS([wcwidth], [], [], [[
+    #include <wchar.h>
+  ]])
+  if test $ac_cv_have_decl_wcwidth != yes; then
+    HAVE_DECL_WCWIDTH=0
+  fi
+
+  if test $ac_cv_func_wcwidth != yes; then
+    AC_CACHE_CHECK([whether wcwidth is a macro],
+      [gl_cv_func_wcwidth_macro],
+      [AC_EGREP_CPP([wchar_header_defines_wcwidth], [
+#include <wchar.h>
+#ifdef wcwidth
+ wchar_header_defines_wcwidth
+#endif],
+         [gl_cv_func_wcwidth_macro=yes],
+         [gl_cv_func_wcwidth_macro=no])
+      ])
+  fi
+
+  if test $ac_cv_func_wcwidth = yes || test $gl_cv_func_wcwidth_macro = yes; then
+    HAVE_WCWIDTH=1
+    dnl On Mac OS X 10.3, wcwidth(0x0301) (COMBINING ACUTE ACCENT) returns 1.
+    dnl On NetBSD 9.0, OpenBSD 5.0, MidnightBSD 1.1,
+    dnl wcwidth(0x05B0) (HEBREW POINT SHEVA) returns 1.
+    dnl On NetBSD 9.0, MidnightBSD 1.1, OSF/1 5.1,
+    dnl wcwidth(0x200B) (ZERO WIDTH SPACE) returns 1.
+    dnl On OpenBSD 5.8, wcwidth(0xFF1A) (FULLWIDTH COLON) returns 0.
+    dnl This leads to bugs in 'ls' (coreutils).
+    dnl On Solaris 11.4, wcwidth(0x2202) (PARTIAL DIFFERENTIAL) returns 2,
+    dnl even in Western locales.
+    AC_CACHE_CHECK([whether wcwidth works reasonably in UTF-8 locales],
+      [gl_cv_func_wcwidth_works],
+      [
+        AC_RUN_IFELSE(
+          [AC_LANG_SOURCE([[
+#include <locale.h>
+#include <wchar.h>
+#if !HAVE_DECL_WCWIDTH
+extern
+# ifdef __cplusplus
+"C"
+# endif
+int wcwidth (int);
+#endif
+int main ()
+{
+  int result = 0;
+  if (setlocale (LC_ALL, "en_US.UTF-8") != NULL)
+    {
+      if (wcwidth (0x0301) > 0)
+        result |= 1;
+      if (wcwidth (0x05B0) > 0)
+        result |= 2;
+      if (wcwidth (0x200B) > 0)
+        result |= 4;
+      if (wcwidth (0xFF1A) == 0)
+        result |= 8;
+      if (wcwidth (0x2202) > 1)
+        result |= 16;
+    }
+  return result;
+}]])],
+          [gl_cv_func_wcwidth_works=yes],
+          [gl_cv_func_wcwidth_works=no],
+          [
+changequote(,)dnl
+           case "$host_os" in
+                            # Guess yes on glibc systems.
+             *-gnu* | gnu*) gl_cv_func_wcwidth_works="guessing yes";;
+                            # Guess yes on musl systems.
+             *-musl*)       gl_cv_func_wcwidth_works="guessing yes";;
+                            # Guess yes on AIX 7 systems.
+             aix[7-9]*)     gl_cv_func_wcwidth_works="guessing yes";;
+             *)             gl_cv_func_wcwidth_works="$gl_cross_guess_normal";;
+           esac
+changequote([,])dnl
+          ])
+      ])
+    case "$gl_cv_func_wcwidth_works" in
+      *yes) ;;
+      *no) REPLACE_WCWIDTH=1 ;;
+    esac
+  else
+    HAVE_WCWIDTH=0
+  fi
+  dnl We don't substitute HAVE_WCWIDTH. We assume that if the system does not
+  dnl have the wcwidth function, then it does not declare it.
+])
+
+# Prerequisites of lib/wcwidth.c.
+AC_DEFUN([gl_PREREQ_WCWIDTH], [
+  AC_REQUIRE([AC_C_INLINE])
+  :
+])
diff --git a/src/grep/m4/windows-stat-inodes.m4 b/src/grep/m4/windows-stat-inodes.m4
new file mode 100644
index 0000000..01a8040
--- /dev/null
+++ b/src/grep/m4/windows-stat-inodes.m4
@@ -0,0 +1,19 @@
+# windows-stat-inodes.m4 serial 1
+dnl Copyright (C) 2017-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Enable inode identification in 'struct stat' on native Windows platforms.
+dnl Set WINDOWS_STAT_INODES to
+dnl - 0 -> keep the default (dev_t = 32-bit, ino_t = 16-bit),
+dnl - 1 -> override types normally (dev_t = 32-bit, ino_t = 64-bit),
+dnl - 2 -> override types in an extended way (dev_t = 64-bit, ino_t = 128-bit).
+AC_DEFUN([gl_WINDOWS_STAT_INODES],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  case "$host_os" in
+    mingw*) WINDOWS_STAT_INODES=1 ;;
+    *)      WINDOWS_STAT_INODES=0 ;;
+  esac
+])
diff --git a/src/grep/m4/wint_t.m4 b/src/grep/m4/wint_t.m4
new file mode 100644
index 0000000..a49c508
--- /dev/null
+++ b/src/grep/m4/wint_t.m4
@@ -0,0 +1,57 @@
+# wint_t.m4 serial 11
+dnl Copyright (C) 2003, 2007-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+dnl Test whether <wchar.h> has the 'wint_t' type and whether gnulib's
+dnl <wchar.h> or <wctype.h> would, if present, override 'wint_t'.
+dnl Prerequisite: AC_PROG_CC
+
+AC_DEFUN([gt_TYPE_WINT_T],
+[
+  AC_CACHE_CHECK([for wint_t], [gt_cv_c_wint_t],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <wchar.h>
+            wint_t foo = (wchar_t)'\0';]],
+          [[]])],
+       [gt_cv_c_wint_t=yes],
+       [gt_cv_c_wint_t=no])])
+  if test $gt_cv_c_wint_t = yes; then
+    AC_DEFINE([HAVE_WINT_T], [1], [Define if you have the 'wint_t' type.])
+
+    dnl Determine whether gnulib's <wchar.h> or <wctype.h> would, if present,
+    dnl override 'wint_t'.
+    AC_CACHE_CHECK([whether wint_t is large enough],
+      [gl_cv_type_wint_t_large_enough],
+      [AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[#include <wchar.h>
+              int verify[sizeof (wint_t) < sizeof (int) ? -1 : 1];
+            ]])],
+         [gl_cv_type_wint_t_large_enough=yes],
+         [gl_cv_type_wint_t_large_enough=no])])
+    if test $gl_cv_type_wint_t_large_enough = no; then
+      GNULIBHEADERS_OVERRIDE_WINT_T=1
+    else
+      GNULIBHEADERS_OVERRIDE_WINT_T=0
+    fi
+  else
+    GNULIBHEADERS_OVERRIDE_WINT_T=0
+  fi
+  AC_SUBST([GNULIBHEADERS_OVERRIDE_WINT_T])
+])
+
+dnl Prerequisites of the 'wint_t' override.
+AC_DEFUN([gl_TYPE_WINT_T_PREREQ],
+[
+  AC_CHECK_HEADERS_ONCE([crtdefs.h])
+  if test $ac_cv_header_crtdefs_h = yes; then
+    HAVE_CRTDEFS_H=1
+  else
+    HAVE_CRTDEFS_H=0
+  fi
+  AC_SUBST([HAVE_CRTDEFS_H])
+])
diff --git a/src/grep/m4/wmemchr.m4 b/src/grep/m4/wmemchr.m4
new file mode 100644
index 0000000..a5b4eb7
--- /dev/null
+++ b/src/grep/m4/wmemchr.m4
@@ -0,0 +1,25 @@
+# wmemchr.m4 serial 5
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_WMEMCHR],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+  dnl We cannot use AC_CHECK_FUNCS here, because the MSVC 9 header files
+  dnl provide this function as an inline function definition.
+  AC_CACHE_CHECK([for wmemchr], [gl_cv_func_wmemchr],
+    [AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <wchar.h>
+          ]],
+          [[return ! wmemchr ((const wchar_t *) 0, (wchar_t) ' ', 0);]])
+       ],
+       [gl_cv_func_wmemchr=yes],
+       [gl_cv_func_wmemchr=no])
+    ])
+  if test $gl_cv_func_wmemchr = no; then
+    HAVE_WMEMCHR=0
+  fi
+])
diff --git a/src/grep/m4/wmempcpy.m4 b/src/grep/m4/wmempcpy.m4
new file mode 100644
index 0000000..9d774ae
--- /dev/null
+++ b/src/grep/m4/wmempcpy.m4
@@ -0,0 +1,21 @@
+# wmempcpy.m4 serial 1
+dnl Copyright (C) 2020-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_WMEMPCPY],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+
+  dnl Persuade glibc <wchar.h> to declare wmempcpy().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  dnl The wmempcpy() declaration in lib/wchar.in.h uses 'restrict'.
+  AC_REQUIRE([AC_C_RESTRICT])
+
+  AC_CHECK_FUNCS_ONCE([wmempcpy])
+  if test $ac_cv_func_wmempcpy = no; then
+    HAVE_WMEMPCPY=0
+  fi
+])
diff --git a/src/grep/m4/xalloc.m4 b/src/grep/m4/xalloc.m4
new file mode 100644
index 0000000..8fabf1c
--- /dev/null
+++ b/src/grep/m4/xalloc.m4
@@ -0,0 +1,7 @@
+# xalloc.m4 serial 18
+dnl Copyright (C) 2002-2006, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_XALLOC], [:])
diff --git a/src/grep/m4/xsize.m4 b/src/grep/m4/xsize.m4
new file mode 100644
index 0000000..64e8a4f
--- /dev/null
+++ b/src/grep/m4/xsize.m4
@@ -0,0 +1,12 @@
+# xsize.m4 serial 5
+dnl Copyright (C) 2003-2004, 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_XSIZE],
+[
+  dnl Prerequisites of lib/xsize.h.
+  AC_REQUIRE([gl_SIZE_MAX])
+  AC_CHECK_HEADERS([stdint.h])
+])
diff --git a/src/grep/m4/xstrtol.m4 b/src/grep/m4/xstrtol.m4
new file mode 100644
index 0000000..e6cdef5
--- /dev/null
+++ b/src/grep/m4/xstrtol.m4
@@ -0,0 +1,10 @@
+#serial 11
+dnl Copyright (C) 2002-2007, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_XSTRTOL],
+[
+  :
+])
diff --git a/src/grep/m4/year2038.m4 b/src/grep/m4/year2038.m4
new file mode 100644
index 0000000..da0f8d7
--- /dev/null
+++ b/src/grep/m4/year2038.m4
@@ -0,0 +1,124 @@
+# year2038.m4 serial 7
+dnl Copyright (C) 2017-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Attempt to ensure that 'time_t' can go past the year 2038 and that
+dnl the functions 'time', 'stat', etc. work with post-2038 timestamps.
+
+AC_DEFUN([gl_YEAR2038_EARLY],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  case "$host_os" in
+    mingw*)
+      AC_DEFINE([__MINGW_USE_VC2005_COMPAT], [1],
+        [For 64-bit time_t on 32-bit mingw.])
+      ;;
+  esac
+])
+
+# gl_YEAR2038_TEST_INCLUDES
+# -------------------------
+AC_DEFUN([gl_YEAR2038_TEST_INCLUDES],
+[[
+  #include <time.h>
+  /* Check that time_t can represent 2**32 - 1 correctly.  */
+  #define LARGE_TIME_T \\
+    ((time_t) (((time_t) 1 << 30) - 1 + 3 * ((time_t) 1 << 30)))
+  int verify_time_t_range[(LARGE_TIME_T / 65537 == 65535
+                           && LARGE_TIME_T % 65537 == 0)
+                          ? 1 : -1];
+]])
+
+# gl_YEAR2038_BODY(REQUIRE-YEAR2038-SAFE)
+-----------------------------------------
+AC_DEFUN([gl_YEAR2038_BODY],
+[
+ AC_ARG_ENABLE([year2038],
+   [  --disable-year2038      omit support for timestamps past the year 2038])
+ AS_IF([test "$enable_year2038" != no],
+ [
+  dnl On many systems, time_t is already a 64-bit type.
+  dnl On those systems where time_t is still 32-bit, it requires kernel
+  dnl and libc support to make it 64-bit. For glibc 2.34 and later on Linux,
+  dnl defining _TIME_BITS=64 and _FILE_OFFSET_BITS=64 is needed on x86 and ARM.
+  dnl
+  dnl On native Windows, the system include files define types __time32_t
+  dnl and __time64_t. By default, time_t is an alias of
+  dnl   - __time32_t on 32-bit mingw,
+  dnl   - __time64_t on 64-bit mingw and on MSVC (since MSVC 8).
+  dnl But when compiling with -D__MINGW_USE_VC2005_COMPAT, time_t is an
+  dnl alias of __time64_t.
+  dnl And when compiling with -D_USE_32BIT_TIME_T, time_t is an alias of
+  dnl __time32_t.
+  AC_CACHE_CHECK([for time_t past the year 2038], [gl_cv_type_time_t_y2038],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_SOURCE([gl_YEAR2038_TEST_INCLUDES])],
+       [gl_cv_type_time_t_y2038=yes], [gl_cv_type_time_t_y2038=no])
+    ])
+  if test "$gl_cv_type_time_t_y2038" = no; then
+    AC_CACHE_CHECK([for 64-bit time_t with _TIME_BITS=64],
+      [gl_cv_type_time_t_bits_macro],
+      [AC_COMPILE_IFELSE(
+         [AC_LANG_SOURCE([[#define _TIME_BITS 64
+                           #define _FILE_OFFSET_BITS 64
+                           ]gl_YEAR2038_TEST_INCLUDES])],
+         [gl_cv_type_time_t_bits_macro=yes],
+         [gl_cv_type_time_t_bits_macro=no])
+      ])
+    if test "$gl_cv_type_time_t_bits_macro" = yes; then
+      AC_DEFINE([_TIME_BITS], [64],
+        [Number of bits in a timestamp, on hosts where this is settable.])
+      dnl AC_SYS_LARGFILE also defines this; it's OK if we do too.
+      AC_DEFINE([_FILE_OFFSET_BITS], [64],
+        [Number of bits in a file offset, on hosts where this is settable.])
+      gl_cv_type_time_t_y2038=yes
+    fi
+  fi
+  if test $gl_cv_type_time_t_y2038 = no; then
+    AC_COMPILE_IFELSE(
+      [AC_LANG_SOURCE(
+         [[#ifdef _USE_32BIT_TIME_T
+             int ok;
+           #else
+             error fail
+           #endif
+         ]])],
+      [AC_MSG_FAILURE(
+         [The 'time_t' type stops working after January 2038.
+          Remove _USE_32BIT_TIME_T from the compiler flags.])],
+      [# If not cross-compiling and $1 says we should check,
+       # and 'touch' works with a large timestamp, then evidently wider time_t
+       # is desired and supported, so fail and ask the builder to fix the
+       # problem.  Otherwise, just warn the builder.
+       m4_ifval([$1],
+         [if test $cross_compiling = no \
+             && TZ=UTC0 touch -t 210602070628.15 conftest.time 2>/dev/null; then
+            case `TZ=UTC0 LC_ALL=C ls -l conftest.time 2>/dev/null` in
+              *'Feb  7  2106'* | *'Feb  7 17:10'*)
+                AC_MSG_FAILURE(
+                  [The 'time_t' type stops working after January 2038,
+                   and your system appears to support a wider 'time_t'.
+                   Try configuring with 'CC="${CC} -m64"'.
+                   To build with a 32-bit time_t anyway (not recommended),
+                   configure with '--disable-year2038'.]);;
+            esac
+            rm -f conftest.time
+          fi])
+       if test "$gl_warned_about_y2038" != yes; then
+         AC_MSG_WARN(
+           [The 'time_t' type stops working after January 2038,
+            and this package needs a wider 'time_t' type
+            if there is any way to access timestamps after that.
+            Configure with 'CC="${CC} -m64"' perhaps?])
+         gl_warned_about_y2038=yes
+       fi
+      ])
+  fi])
+])
+
+AC_DEFUN([gl_YEAR2038],
+[
+  gl_YEAR2038_BODY([require-year2038-safe])
+])
diff --git a/src/grep/m4/zzgnulib.m4 b/src/grep/m4/zzgnulib.m4
new file mode 100644
index 0000000..b953384
--- /dev/null
+++ b/src/grep/m4/zzgnulib.m4
@@ -0,0 +1,23 @@
+# zzgnulib.m4 serial 1
+dnl Copyright (C) 2020-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl This file must be named something that sorts after all other
+dnl package- or gnulib-provided .m4 files - at least for those packages
+dnl that redefine AC_PROG_CC.
+
+dnl Redefine AC_PROG_CC so that it ends with invocations of gl_COMPILER_CLANG
+dnl and gl_COMPILER_PREPARE_CHECK_DECL.
+m4_define([AC_PROG_CC],
+  m4_defn([AC_PROG_CC])[
+gl_COMPILER_CLANG
+gl_COMPILER_PREPARE_CHECK_DECL
+])
+
+# gl_ZZGNULIB
+# -----------
+# Witness macro that this file has been included.  Needed to force
+# Automake to include this file after all other gnulib .m4 files.
+AC_DEFUN([gl_ZZGNULIB])
diff --git a/src/grep/maint.mk b/src/grep/maint.mk
new file mode 100644
index 0000000..6a3ea96
--- /dev/null
+++ b/src/grep/maint.mk
@@ -0,0 +1,1759 @@
+# -*-Makefile-*-
+# This Makefile fragment tries to be general-purpose enough to be
+# used by many projects via the gnulib maintainer-makefile module.
+
+## Copyright (C) 2001-2021 Free Software Foundation, Inc.
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# This is reported not to work with make-3.79.1
+# ME := $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))
+ME := maint.mk
+
+# These variables ought to be defined through the configure.ac section
+# of the module description. But some packages import this file directly,
+# ignoring the module description.
+AWK ?= awk
+GREP ?= grep
+SED ?= sed
+
+# Helper variables.
+_empty =
+_sp = $(_empty) $(_empty)
+
+# _equal,S1,S2
+# ------------
+# If S1 == S2, return S1, otherwise the empty string.
+_equal = $(and $(findstring $(1),$(2)),$(findstring $(2),$(1)))
+
+# member-check,VARIABLE,VALID-VALUES
+# ----------------------------------
+# Check that $(VARIABLE) is in the space-separated list of VALID-VALUES, and
+# return it.  Die otherwise.
+member-check =								\
+  $(strip								\
+    $(if $($(1)),							\
+      $(if $(findstring $(_sp),$($(1))),				\
+          $(error invalid $(1): '$($(1))', expected $(2)),		\
+          $(or $(findstring $(_sp)$($(1))$(_sp),$(_sp)$(2)$(_sp)),	\
+            $(error invalid $(1): '$($(1))', expected $(2)))),		\
+      $(error $(1) undefined)))
+
+# Do not save the original name or timestamp in the .tar.gz file.
+# Use --rsyncable if available.
+gzip_rsyncable := \
+  $(shell gzip --help 2>/dev/null|$(GREP) rsyncable >/dev/null \
+    && printf %s --rsyncable)
+GZIP_ENV = '--no-name --best $(gzip_rsyncable)'
+
+GIT = git
+VC = $(GIT)
+
+VC_LIST = $(srcdir)/$(_build-aux)/vc-list-files -C $(srcdir)
+
+# You can override this variable in cfg.mk if your gnulib submodule lives
+# in a different location.
+gnulib_dir ?= $(shell if test -d $(srcdir)/gnulib; then \
+			echo $(srcdir)/gnulib; \
+		else \
+			echo ${GNULIB_SRCDIR}; \
+		fi)
+
+# You can override this variable in cfg.mk to set your own regexp
+# matching files to ignore.
+VC_LIST_ALWAYS_EXCLUDE_REGEX ?= ^$$
+
+# This is to preprocess robustly the output of $(VC_LIST), so that even
+# when $(srcdir) is a pathological name like "....", the leading sed command
+# removes only the intended prefix.
+_dot_escaped_srcdir = $(subst .,\.,$(srcdir))
+
+# Post-process $(VC_LIST) output, prepending $(srcdir)/, but only
+# when $(srcdir) is not ".".
+ifeq ($(srcdir),.)
+  _prepend_srcdir_prefix =
+else
+  _prepend_srcdir_prefix = | $(SED) 's|^|$(srcdir)/|'
+endif
+
+# In order to be able to consistently filter "."-relative names,
+# (i.e., with no $(srcdir) prefix), this definition is careful to
+# remove any $(srcdir) prefix, and to restore what it removes.
+_sc_excl = \
+  $(or $(exclude_file_name_regexp--$@),^$$)
+VC_LIST_EXCEPT = \
+  $(VC_LIST) | $(SED) 's|^$(_dot_escaped_srcdir)/||' \
+	| if test -f $(srcdir)/.x-$@; then $(GREP) -vEf $(srcdir)/.x-$@; \
+	  else $(GREP) -Ev -e "$${VC_LIST_EXCEPT_DEFAULT-ChangeLog}"; fi \
+	| $(GREP) -Ev -e '($(VC_LIST_ALWAYS_EXCLUDE_REGEX)|$(_sc_excl))' \
+	$(_prepend_srcdir_prefix)
+
+ifeq ($(origin prev_version_file), undefined)
+  prev_version_file = $(srcdir)/.prev-version
+endif
+
+PREV_VERSION := $(shell cat $(prev_version_file) 2>/dev/null)
+VERSION_REGEXP = $(subst .,\.,$(VERSION))
+PREV_VERSION_REGEXP = $(subst .,\.,$(PREV_VERSION))
+
+ifeq ($(VC),$(GIT))
+  this-vc-tag = v$(VERSION)
+  this-vc-tag-regexp = v$(VERSION_REGEXP)
+else
+  tag-package = $(shell echo "$(PACKAGE)" | tr '[:lower:]' '[:upper:]')
+  tag-this-version = $(subst .,_,$(VERSION))
+  this-vc-tag = $(tag-package)-$(tag-this-version)
+  this-vc-tag-regexp = $(this-vc-tag)
+endif
+my_distdir = $(PACKAGE)-$(VERSION)
+
+# Old releases are stored here.
+release_archive_dir ?= ../release
+
+# If RELEASE_TYPE is undefined, but RELEASE is, use its second word.
+# But overwrite VERSION.
+ifdef RELEASE
+  VERSION := $(word 1, $(RELEASE))
+  RELEASE_TYPE ?= $(word 2, $(RELEASE))
+endif
+
+# Validate and return $(RELEASE_TYPE), or die.
+RELEASE_TYPES = alpha beta stable
+release-type = $(call member-check,RELEASE_TYPE,$(RELEASE_TYPES))
+
+# Override gnu_rel_host and url_dir_list in cfg.mk if these are not right.
+# Use alpha.gnu.org for alpha and beta releases.
+# Use ftp.gnu.org for stable releases.
+gnu_ftp_host-alpha = alpha.gnu.org
+gnu_ftp_host-beta = alpha.gnu.org
+gnu_ftp_host-stable = ftp.gnu.org
+gnu_rel_host ?= $(gnu_ftp_host-$(release-type))
+
+url_dir_list ?= $(if $(call _equal,$(gnu_rel_host),ftp.gnu.org),	\
+                     https://ftpmirror.gnu.org/$(PACKAGE),		\
+                     https://$(gnu_rel_host)/gnu/$(PACKAGE))
+
+# Override this in cfg.mk if you are using a different format in your
+# NEWS file.
+today = $(shell date +%Y-%m-%d)
+
+# Select which lines of NEWS are searched for $(news-check-regexp).
+# This is a sed line number spec.  The default says that we search
+# lines 1..10 of NEWS for $(news-check-regexp).
+# If you want to search only line 3 or only lines 20-22, use "3" or "20,22".
+news-check-lines-spec ?= 1,10
+news-check-regexp ?= '^\*.* $(VERSION_REGEXP) \($(today)\)'
+
+# Prevent programs like 'sort' from considering distinct strings to be equal.
+# Doing it here saves us from having to set LC_ALL elsewhere in this file.
+export LC_ALL = C
+
+## --------------- ##
+## Sanity checks.  ##
+## --------------- ##
+
+ifneq ($(_gl-Makefile),)
+_cfg_mk := $(wildcard $(srcdir)/cfg.mk)
+
+# Collect the names of rules starting with 'sc_'.
+syntax-check-rules := $(sort $(shell env LC_ALL=C $(SED) -n \
+   's/^\(sc_[a-zA-Z0-9_-]*\):.*/\1/p' $(srcdir)/$(ME) $(_cfg_mk)))
+.PHONY: $(syntax-check-rules)
+
+ifeq ($(shell $(VC_LIST) >/dev/null 2>&1; echo $$?),0)
+  local-checks-available += $(syntax-check-rules)
+else
+  local-checks-available += no-vc-detected
+no-vc-detected:
+	@echo "No version control files detected; skipping syntax check"
+endif
+.PHONY: $(local-checks-available)
+
+# Arrange to print the name of each syntax-checking rule just before running it.
+$(syntax-check-rules): %: %.m
+sc_m_rules_ = $(patsubst %, %.m, $(syntax-check-rules))
+.PHONY: $(sc_m_rules_)
+$(sc_m_rules_):
+	@echo $(patsubst sc_%.m, %, $@)
+	@date +%s.%N > .sc-start-$(basename $@)
+
+# Compute and print the elapsed time for each syntax-check rule.
+sc_z_rules_ = $(patsubst %, %.z, $(syntax-check-rules))
+.PHONY: $(sc_z_rules_)
+$(sc_z_rules_): %.z: %
+	@end=$$(date +%s.%N);						\
+	start=$$(cat .sc-start-$*);					\
+	rm -f .sc-start-$*;						\
+	$(AWK) -v s=$$start -v e=$$end					\
+	  'END {printf "%.2f $(patsubst sc_%,%,$*)\n", e - s}' < /dev/null
+
+# The patsubst here is to replace each sc_% rule with its sc_%.z wrapper
+# that computes and prints elapsed time.
+local-check :=								\
+  $(patsubst sc_%, sc_%.z,						\
+    $(filter-out $(local-checks-to-skip), $(local-checks-available)))
+
+syntax-check: $(local-check)
+endif
+
+# _sc_search_regexp
+#
+# This macro searches for a given construct in the selected files and
+# then takes some action.
+#
+# Parameters (shell variables):
+#
+#  prohibit | require
+#
+#     Regular expression (ERE) denoting either a forbidden construct
+#     or a required construct.  Those arguments are exclusive.
+#
+#  exclude
+#
+#     Regular expression (ERE) denoting lines to ignore that matched
+#     a prohibit construct.  For example, this can be used to exclude
+#     comments that mention why the nearby code uses an alternative
+#     construct instead of the simpler prohibited construct.
+#
+#  in_vc_files | in_files
+#
+#     grep-E-style regexp selecting the files to check.  For in_vc_files,
+#     the regexp is used to select matching files from the list of all
+#     version-controlled files; for in_files, it's from the names printed
+#     by "find $(srcdir)".  When neither is specified, use all files that
+#     are under version control.
+#
+#  containing | non_containing
+#
+#     Select the files (non) containing strings matching this regexp.
+#     If both arguments are specified then CONTAINING takes
+#     precedence.
+#
+#  with_grep_options
+#
+#     Extra options for grep.
+#
+#  ignore_case
+#
+#     Ignore case.
+#
+#  halt
+#
+#     Message to display before to halting execution.
+#
+# Finally, you may exempt files based on an ERE matching file names.
+# For example, to exempt from the sc_space_tab check all files with the
+# .diff suffix, set this Make variable:
+#
+# exclude_file_name_regexp--sc_space_tab = \.diff$
+#
+# Note that while this functionality is mostly inherited via VC_LIST_EXCEPT,
+# when filtering by name via in_files, we explicitly filter out matching
+# names here as well.
+
+# Initialize each, so that envvar settings cannot interfere.
+export require =
+export prohibit =
+export exclude =
+export in_vc_files =
+export in_files =
+export containing =
+export non_containing =
+export halt =
+export with_grep_options =
+
+# By default, _sc_search_regexp does not ignore case.
+export ignore_case =
+_ignore_case = $$(test -n "$$ignore_case" && printf %s -i || :)
+
+define _sc_say_and_exit
+   dummy=; : so we do not need a semicolon before each use;		\
+   { printf '%s\n' "$(ME): $$msg" 1>&2; exit 1; };
+endef
+
+define _sc_search_regexp
+   dummy=; : so we do not need a semicolon before each use;		\
+									\
+   : Check arguments;							\
+   test -n "$$prohibit" && test -n "$$require"				\
+     && { msg='Cannot specify both prohibit and require'		\
+          $(_sc_say_and_exit) } || :;					\
+   test -z "$$prohibit" && test -z "$$require"				\
+     && { msg='Should specify either prohibit or require'		\
+          $(_sc_say_and_exit) } || :;					\
+   test -z "$$prohibit" && test -n "$$exclude"				\
+     && { msg='Use of exclude requires a prohibit pattern'		\
+          $(_sc_say_and_exit) } || :;					\
+   test -n "$$in_vc_files" && test -n "$$in_files"			\
+     && { msg='Cannot specify both in_vc_files and in_files'		\
+          $(_sc_say_and_exit) } || :;					\
+   test "x$$halt" != x							\
+     || { msg='halt not defined' $(_sc_say_and_exit) };			\
+									\
+   : Filter by file name;						\
+   if test -n "$$in_files"; then					\
+     files=$$(find $(srcdir) | $(GREP) -E "$$in_files"			\
+              | $(GREP) -Ev '$(_sc_excl)');				\
+   else									\
+     files=$$($(VC_LIST_EXCEPT));					\
+     if test -n "$$in_vc_files"; then					\
+       files=$$(echo "$$files" | $(GREP) -E "$$in_vc_files");		\
+     fi;								\
+   fi;									\
+									\
+   : Filter by content;							\
+   test -n "$$files"							\
+     && test -n "$$containing"						\
+     && { files=$$(echo "$$files" | xargs $(GREP) -l "$$containing"); }	\
+     || :;								\
+   test -n "$$files"							\
+     && test -n "$$non_containing"					\
+     && { files=$$(echo "$$files" | xargs $(GREP) -vl "$$non_containing"); } \
+     || :;								\
+									\
+   : Check for the construct;						\
+   if test -n "$$files"; then						\
+     if test -n "$$prohibit"; then					\
+       echo "$$files"							\
+         | xargs $(GREP) $$with_grep_options $(_ignore_case) -nE	\
+		"$$prohibit" /dev/null					\
+         | $(GREP) -vE "$${exclude:-^$$}"				\
+         && { msg="$$halt" $(_sc_say_and_exit) }			\
+         || :;								\
+     else								\
+       echo "$$files"							\
+         | xargs							\
+             $(GREP) $$with_grep_options $(_ignore_case) -LE "$$require" \
+         | $(GREP) .							\
+         && { msg="$$halt" $(_sc_say_and_exit) }			\
+         || :;								\
+     fi									\
+   else :;								\
+   fi || :;
+endef
+
+sc_avoid_if_before_free:
+	@$(VC_LIST_EXCEPT)						\
+	  | $(GREP) -v useless-if-before-free				\
+	  | xargs							\
+	      $(srcdir)/$(_build-aux)/useless-if-before-free		\
+	      $(useless_free_options)					\
+	  && { printf '$(ME): found useless "if"'			\
+		      ' before "free" above\n' 1>&2;			\
+	       exit 1; }						\
+	  || :
+
+sc_cast_of_argument_to_free:
+	@prohibit='\<free *\( *\(' halt="don't cast free argument"	\
+	  $(_sc_search_regexp)
+
+sc_cast_of_x_alloc_return_value:
+	@prohibit='\*\) *x(m|c|re)alloc\>'				\
+	halt="don't cast x*alloc return value"				\
+	  $(_sc_search_regexp)
+
+sc_cast_of_alloca_return_value:
+	@prohibit='\*\) *alloca\>'					\
+	halt="don't cast alloca return value"				\
+	  $(_sc_search_regexp)
+
+sc_space_tab:
+	@prohibit='[ ]	'						\
+	halt='found SPACE-TAB sequence; remove the SPACE'		\
+	  $(_sc_search_regexp)
+
+# Don't use *scanf or the old ato* functions in "real" code.
+# They provide no error checking mechanism.
+# Instead, use strto* functions.
+sc_prohibit_atoi_atof:
+	@prohibit='\<([fs]?scanf|ato([filq]|ll)) *\('				\
+	halt='do not use *scan''f, ato''f, ato''i, ato''l, ato''ll or ato''q'	\
+	  $(_sc_search_regexp)
+
+# Use STREQ rather than comparing strcmp == 0, or != 0.
+sp_ = strcmp *\(.+\)
+sc_prohibit_strcmp:
+	@prohibit='! *strcmp *\(|\<$(sp_) *[!=]=|[!=]= *$(sp_)'		\
+	exclude='# *define STRN?EQ\('					\
+	halt='replace strcmp calls above with STREQ/STRNEQ'		\
+	  $(_sc_search_regexp)
+
+# Really.  You don't want to use this function.
+# It may fail to NUL-terminate the destination,
+# and always NUL-pads out to the specified length.
+sc_prohibit_strncpy:
+	@prohibit='\<strncpy *\('					\
+	halt='do not use strncpy, period'				\
+	  $(_sc_search_regexp)
+
+# Pass EXIT_*, not number, to usage, exit, and error (when exiting)
+# Convert all uses automatically, via these two commands:
+# git grep -l '\<exit *(1)' \
+#  | grep -vEf .x-sc_prohibit_magic_number_exit \
+#  | xargs --no-run-if-empty \
+#      perl -pi -e 's/(^|[^.])\b(exit ?)\(1\)/$1$2(EXIT_FAILURE)/'
+# git grep -l '\<exit *(0)' \
+#  | grep -vEf .x-sc_prohibit_magic_number_exit \
+#  | xargs --no-run-if-empty \
+#      perl -pi -e 's/(^|[^.])\b(exit ?)\(0\)/$1$2(EXIT_SUCCESS)/'
+sc_prohibit_magic_number_exit:
+	@prohibit='(^|[^.])\<(usage|exit|error) ?\(-?[0-9]+[,)]'	\
+	exclude='exit \(77\)|error ?\(((0|77),|[^,]*)'			\
+	halt='use EXIT_* values rather than magic number'		\
+	  $(_sc_search_regexp)
+
+# Check that we don't use $< in non-implicit Makefile rules.
+#
+# To find the Makefiles, trace AC_CONFIG_FILES.  Using VC_LIST would
+# miss the Makefiles that are not under VC control (e.g., symlinks
+# installed for gettext).  "Parsing" (recursive) uses of SUBDIRS seems
+# too delicate.
+#
+# Use GNU Make's --print-data-base to normalize the rules into some
+# easy to parse format: they are separated by two \n.  Look for the
+# "section" about non-pattern rules (marked with "# Files") inside
+# which there are still the POSIX Make like implicit rules (".c.o").
+sc_prohibit_gnu_make_extensions_awk_ =					\
+  BEGIN {								\
+      RS = "\n\n";							\
+      in_rules = 0;							\
+  }									\
+  /^\# Files/ {								\
+      in_rules = 1;							\
+  }									\
+  /\$$</ && in_rules && $$0 !~ /^(.*\n)*\.\w+(\.\w+)?:/ {		\
+      print "Error: " file ": $$< in a non implicit rule\n" $$0;	\
+      status = 1;							\
+  }									\
+  END {									\
+     exit status;							\
+  }
+sc_prohibit_gnu_make_extensions:
+	@if $(AWK) --version | grep GNU >/dev/null 2>&1; then		\
+	  (cd $(srcdir) && autoconf --trace AC_CONFIG_FILES:'$$1') |	\
+	    tr ' ' '\n' |						\
+	    $(SED) -ne '/Makefile/{s/\.in$$//;p;}' |			\
+	    while read m; do						\
+	      $(MAKE) -qp -f $$m .DUMMY-TARGET 2>/dev/null |		\
+		$(AWK) -v file=$$m -e '$($@_awk_)' || exit 1;		\
+	    done;							\
+	fi
+
+# Using EXIT_SUCCESS as the first argument to error is misleading,
+# since when that parameter is 0, error does not exit.  Use '0' instead.
+sc_error_exit_success:
+	@prohibit='error *\(EXIT_SUCCESS,'				\
+	in_vc_files='\.[chly]$$'					\
+	halt='found error (EXIT_SUCCESS'				\
+	 $(_sc_search_regexp)
+
+# "FATAL:" should be fully upper-cased in error messages
+# "WARNING:" should be fully upper-cased, or fully lower-cased
+sc_error_message_warn_fatal:
+	@$(VC_LIST_EXCEPT)						\
+	  | xargs $(GREP) -nEA2 '[^rp]error *\(' /dev/null		\
+	  | $(GREP) -E '"Warning|"Fatal|"fatal'				\
+	  && { echo '$(ME): use FATAL, WARNING or warning' 1>&2;	\
+	       exit 1; }						\
+	  || :
+
+# Error messages should not start with a capital letter
+sc_error_message_uppercase:
+	@$(VC_LIST_EXCEPT)						\
+	  | xargs $(GREP) -nEA2 '[^rp]error *\(' /dev/null		\
+	  | $(GREP) -E '"[A-Z]'						\
+	  | $(GREP) -vE '"FATAL|"WARNING|"Java|"C#|PRIuMAX'		\
+	  && { echo '$(ME): found capitalized error message' 1>&2;	\
+	       exit 1; }						\
+	  || :
+
+# Error messages should not end with a period
+sc_error_message_period:
+	@$(VC_LIST_EXCEPT)						\
+	  | xargs $(GREP) -nEA2 '[^rp]error *\(' /dev/null		\
+	  | $(GREP) -E '[^."]\."'					\
+	  && { echo '$(ME): found error message ending in period' 1>&2;	\
+	       exit 1; }						\
+	  || :
+
+sc_file_system:
+	@prohibit=file''system						\
+	exclude='/proc/filesystems'					\
+	ignore_case=1							\
+	halt='found use of "file''system"; spell it "file system"'	\
+	  $(_sc_search_regexp)
+
+# Don't use cpp tests of this symbol.  All code assumes config.h is included.
+sc_prohibit_have_config_h:
+	@prohibit='^# *if.*HAVE''_CONFIG_H'				\
+	halt='found use of HAVE''_CONFIG_H; remove'			\
+	  $(_sc_search_regexp)
+
+# Nearly all .c files must include <config.h>.  However, we also permit this
+# via inclusion of a package-specific header, if cfg.mk specified one.
+# config_h_header must be suitable for grep -E.
+config_h_header ?= <config\.h>
+sc_require_config_h:
+	@require='^# *include $(config_h_header)'			\
+	in_vc_files='\.c$$'						\
+	halt='the above files do not include <config.h>'		\
+	  $(_sc_search_regexp)
+
+# Print each file name for which the first #include does not match
+# $(config_h_header).  Like grep -m 1, this only looks at the first match.
+perl_config_h_first_ =							\
+  -e 'BEGIN {$$ret = 0}'						\
+  -e 'if (/^\# *include\b/) {'						\
+  -e '  if (not m{^\# *include $(config_h_header)}) {'			\
+  -e '    print "$$ARGV\n";'						\
+  -e '    $$ret = 1;'							\
+  -e '  }'								\
+  -e '  \# Move on to next file after first include'			\
+  -e '  close ARGV;'							\
+  -e '}'								\
+  -e 'END {exit $$ret}'
+
+# You must include <config.h> before including any other header file.
+# This can possibly be via a package-specific header, if given by cfg.mk.
+sc_require_config_h_first:
+	@if $(VC_LIST_EXCEPT) | $(GREP) '\.c$$' > /dev/null; then	\
+	  files=$$($(VC_LIST_EXCEPT) | $(GREP) '\.c$$') &&		\
+	  perl -n $(perl_config_h_first_) $$files ||			\
+	    { echo '$(ME): the above files include some other header'	\
+		'before <config.h>' 1>&2; exit 1; } || :;		\
+	else :;								\
+	fi
+
+sc_prohibit_HAVE_MBRTOWC:
+	@prohibit='\bHAVE_MBRTOWC\b'					\
+	halt="do not use $$prohibit; it is always defined"		\
+	  $(_sc_search_regexp)
+
+# To use this "command" macro, you must first define two shell variables:
+# h: the header name, with no enclosing <> or ""
+# re: a regular expression that matches IFF something provided by $h is used.
+define _sc_header_without_use
+  dummy=; : so we do not need a semicolon before each use;		\
+  h_esc=`echo '[<"]'"$$h"'[">]'|$(SED) 's/\./\\\\./g'`;			\
+  if $(VC_LIST_EXCEPT) | $(GREP) '\.c$$' > /dev/null; then		\
+    files=$$($(GREP) -l '^# *include '"$$h_esc"				\
+	     $$($(VC_LIST_EXCEPT) | $(GREP) '\.c$$')) &&		\
+    $(GREP) -LE "$$re" $$files | $(GREP) . &&				\
+      { echo "$(ME): the above files include $$h but don't use it"	\
+	1>&2; exit 1; } || :;						\
+  else :;								\
+  fi
+endef
+
+# Prohibit the inclusion of assert.h without an actual use of assert.
+sc_prohibit_assert_without_use:
+	@h='assert.h' re='\<assert *\(' $(_sc_header_without_use)
+
+# Prohibit the inclusion of close-stream.h without an actual use.
+sc_prohibit_close_stream_without_use:
+	@h='close-stream.h' re='\<close_stream *\(' $(_sc_header_without_use)
+
+# Prohibit the inclusion of getopt.h without an actual use.
+sc_prohibit_getopt_without_use:
+	@h='getopt.h' re='\<getopt(_long)? *\(' $(_sc_header_without_use)
+
+# Don't include quotearg.h unless you use one of its functions.
+sc_prohibit_quotearg_without_use:
+	@h='quotearg.h' re='\<quotearg(_[^ ]+)? *\(' $(_sc_header_without_use)
+
+# Don't include quote.h unless you use one of its functions.
+sc_prohibit_quote_without_use:
+	@h='quote.h' re='\<quote((_n)? *\(|_quoting_options\>)' \
+	  $(_sc_header_without_use)
+
+# Don't include this header unless you use one of its functions.
+sc_prohibit_long_options_without_use:
+	@h='long-options.h' re='\<parse_(long_options|gnu_standard_options_only) *\(' \
+	  $(_sc_header_without_use)
+
+# Don't include this header unless you use one of its functions.
+sc_prohibit_inttostr_without_use:
+	@h='inttostr.h' re='\<(off|[iu]max|uint)tostr *\(' \
+	  $(_sc_header_without_use)
+
+# Don't include this header unless you use one of its functions.
+sc_prohibit_ignore_value_without_use:
+	@h='ignore-value.h' re='\<ignore_(value|ptr) *\(' \
+	  $(_sc_header_without_use)
+
+# Don't include this header unless you use one of its functions.
+sc_prohibit_error_without_use:
+	@h='error.h' \
+	re='\<error(_at_line|_print_progname|_one_per_line|_message_count)? *\('\
+	  $(_sc_header_without_use)
+
+# Don't include xalloc.h unless you use one of its functions.
+# Consider these symbols:
+# perl -lne '/^# *define (\w+)\(/ and print $1' lib/xalloc.h|grep -v '^__';
+# perl -lne '/^(?:extern )?(?:void|char) \*?(\w+) *\(/ and print $1' lib/xalloc.h
+# Divide into two sets on case, and filter each through this:
+# | sort | perl -MRegexp::Assemble -le \
+#  'print Regexp::Assemble->new(file => "/dev/stdin")->as_string'|sed 's/\?://g'
+# Note this was produced by the above:
+# _xa1 = \
+#x(((2n?)?re|c(har)?|n(re|m)|z)alloc|alloc_(oversized|die)|m(alloc|emdup)|strdup)
+# But we can do better, in at least two ways:
+# 1) take advantage of two "dup"-suffixed strings:
+# x(((2n?)?re|c(har)?|n(re|m)|[mz])alloc|alloc_(oversized|die)|(mem|str)dup)
+# 2) notice that "c(har)?|[mz]" is equivalent to the shorter and more readable
+# "char|[cmz]"
+# x(((2n?)?re|char|n(re|m)|[cmz])alloc|alloc_(oversized|die)|(mem|str)dup)
+_xa1 = x(((2n?)?re|char|n(re|m)|[cmz])alloc|alloc_(oversized|die)|(mem|str)dup)
+_xa2 = X([CZ]|N?M)ALLOC
+sc_prohibit_xalloc_without_use:
+	@h='xalloc.h' \
+	re='\<($(_xa1)|$(_xa2)) *\('\
+	  $(_sc_header_without_use)
+
+# Extract function names:
+# perl -lne '/^(?:extern )?(?:void|char) \*?(\w+) *\(/ and print $1' lib/hash.h
+_hash_re = \
+clear|delete|free|get_(first|next)|insert|lookup|print_statistics|reset_tuning
+_hash_fn = \<($(_hash_re)) *\(
+_hash_struct = (struct )?\<[Hh]ash_(table|tuning)\>
+sc_prohibit_hash_without_use:
+	@h='hash.h' \
+	re='$(_hash_fn)|$(_hash_struct)'\
+	  $(_sc_header_without_use)
+
+sc_prohibit_cloexec_without_use:
+	@h='cloexec.h' re='\<(set_cloexec_flag|dup_cloexec) *\(' \
+	  $(_sc_header_without_use)
+
+sc_prohibit_posixver_without_use:
+	@h='posixver.h' re='\<posix2_version *\(' $(_sc_header_without_use)
+
+sc_prohibit_same_without_use:
+	@h='same.h' re='\<same_name(at)? *\(' $(_sc_header_without_use)
+
+sc_prohibit_hash_pjw_without_use:
+	@h='hash-pjw.h' \
+	re='\<hash_pjw\>' \
+	  $(_sc_header_without_use)
+
+sc_prohibit_safe_read_without_use:
+	@h='safe-read.h' re='(\<SAFE_READ_ERROR\>|\<safe_read *\()' \
+	  $(_sc_header_without_use)
+
+sc_prohibit_argmatch_without_use:
+	@h='argmatch.h' \
+	re='(\<(ARGMATCH_DEFINE_GROUP|ARRAY_CARDINALITY|X?ARGMATCH(|_TO_ARGUMENT|_VERIFY))\>|\<(invalid_arg|argmatch(_exit_fn|_(in)?valid)?) *\()' \
+	  $(_sc_header_without_use)
+
+sc_prohibit_canonicalize_without_use:
+	@h='canonicalize.h' \
+	re='CAN_(EXISTING|ALL_BUT_LAST|MISSING)|canonicalize_(mode_t|filename_mode|file_name)' \
+	  $(_sc_header_without_use)
+
+sc_prohibit_root_dev_ino_without_use:
+	@h='root-dev-ino.h' \
+	re='(\<ROOT_DEV_INO_(CHECK|WARN)\>|\<get_root_dev_ino *\()' \
+	  $(_sc_header_without_use)
+
+sc_prohibit_openat_without_use:
+	@h='openat.h' \
+	re='\<(openat_(permissive|needs_fchdir|(save|restore)_fail)|l?(stat|ch(own|mod))at|(euid)?accessat|(FCHMOD|FCHOWN|STAT)AT_INLINE)\>' \
+	  $(_sc_header_without_use)
+
+# Prohibit the inclusion of c-ctype.h without an actual use.
+ctype_re = isalnum|isalpha|isascii|isblank|iscntrl|isdigit|isgraph|islower\
+|isprint|ispunct|isspace|isupper|isxdigit|tolower|toupper
+sc_prohibit_c_ctype_without_use:
+	@h='c-ctype.h' re='\<c_($(ctype_re)) *\(' \
+	  $(_sc_header_without_use)
+
+# The following list was generated by running:
+# man signal.h|col -b|perl -ne '/bsd_signal.*;/.../sigwaitinfo.*;/ and print' \
+#   | perl -lne '/^\s+(?:int|void).*?(\w+).*/ and print $1' | fmt
+_sig_functions = \
+  bsd_signal kill killpg pthread_kill pthread_sigmask raise sigaction \
+  sigaddset sigaltstack sigdelset sigemptyset sigfillset sighold sigignore \
+  siginterrupt sigismember signal sigpause sigpending sigprocmask sigqueue \
+  sigrelse sigset sigsuspend sigtimedwait sigwait sigwaitinfo
+_sig_function_re = $(subst $(_sp),|,$(strip $(_sig_functions)))
+# The following were extracted from "man signal.h" manually.
+_sig_types_and_consts =							\
+  MINSIGSTKSZ SA_NOCLDSTOP SA_NOCLDWAIT SA_NODEFER SA_ONSTACK		\
+  SA_RESETHAND SA_RESTART SA_SIGINFO SIGEV_NONE SIGEV_SIGNAL		\
+  SIGEV_THREAD SIGSTKSZ SIG_BLOCK SIG_SETMASK SIG_UNBLOCK SS_DISABLE	\
+  SS_ONSTACK mcontext_t pid_t sig_atomic_t sigevent siginfo_t sigset_t	\
+  sigstack sigval stack_t ucontext_t
+# generated via this:
+# perl -lne '/^#ifdef (SIG\w+)/ and print $1' lib/sig2str.c|sort -u|fmt -70
+_sig_names =								\
+  SIGABRT SIGALRM SIGALRM1 SIGBUS SIGCANCEL SIGCHLD SIGCLD SIGCONT	\
+  SIGDANGER SIGDIL SIGEMT SIGFPE SIGFREEZE SIGGRANT SIGHUP SIGILL	\
+  SIGINFO SIGINT SIGIO SIGIOT SIGKAP SIGKILL SIGKILLTHR SIGLOST SIGLWP	\
+  SIGMIGRATE SIGMSG SIGPHONE SIGPIPE SIGPOLL SIGPRE SIGPROF SIGPWR	\
+  SIGQUIT SIGRETRACT SIGSAK SIGSEGV SIGSOUND SIGSTKFLT SIGSTOP SIGSYS	\
+  SIGTERM SIGTHAW SIGTRAP SIGTSTP SIGTTIN SIGTTOU SIGURG SIGUSR1	\
+  SIGUSR2 SIGVIRT SIGVTALRM SIGWAITING SIGWINCH SIGWIND SIGWINDOW	\
+  SIGXCPU SIGXFSZ
+_sig_syms_re = $(subst $(_sp),|,$(strip $(_sig_names) $(_sig_types_and_consts)))
+
+# Prohibit the inclusion of signal.h without an actual use.
+sc_prohibit_signal_without_use:
+	@h='signal.h'							\
+	re='\<($(_sig_function_re)) *\(|\<($(_sig_syms_re))\>'		\
+	  $(_sc_header_without_use)
+
+# Don't include stdio--.h unless you use one of its functions.
+sc_prohibit_stdio--_without_use:
+	@h='stdio--.h' re='\<((f(re)?|p)open|tmpfile) *\('		\
+	  $(_sc_header_without_use)
+
+# Don't include stdio-safer.h unless you use one of its functions.
+sc_prohibit_stdio-safer_without_use:
+	@h='stdio-safer.h' re='\<((f(re)?|p)open|tmpfile)_safer *\('	\
+	  $(_sc_header_without_use)
+
+# Prohibit the inclusion of strings.h without a sensible use.
+# Using the likes of bcmp, bcopy, bzero, index or rindex is not sensible.
+sc_prohibit_strings_without_use:
+	@h='strings.h'							\
+	re='\<(strn?casecmp|ffs(ll)?)\>'				\
+	  $(_sc_header_without_use)
+
+# Extract the raw list of symbol names with this:
+gl_extract_define_simple = \
+  /^\# *define ([A-Z]\w+)\(/ and print $$1
+# Filter out duplicates and convert to a space-separated list:
+_intprops_names = \
+  $(shell f=$(gnulib_dir)/lib/intprops.h;				\
+    perl -lne '$(gl_extract_define_simple)' $$f | sort -u | tr '\n' ' ')
+# Remove trailing space and convert to a regular expression:
+_intprops_syms_re = $(subst $(_sp),|,$(strip $(_intprops_names)))
+# Prohibit the inclusion of intprops.h without an actual use.
+sc_prohibit_intprops_without_use:
+	@h='intprops.h'							\
+	re='\<($(_intprops_syms_re)) *\('				\
+	  $(_sc_header_without_use)
+
+_stddef_syms_re = NULL|offsetof|ptrdiff_t|size_t|wchar_t
+# Prohibit the inclusion of stddef.h without an actual use.
+sc_prohibit_stddef_without_use:
+	@h='stddef.h'							\
+	re='\<($(_stddef_syms_re))\>'					\
+	  $(_sc_header_without_use)
+
+_de1 = dirfd|(close|(fd)?open|read|rewind|seek|tell)dir(64)?(_r)?
+_de2 = (versionsort|struct dirent|getdirentries|alphasort|scandir(at)?)(64)?
+_de3 = MAXNAMLEN|DIR|ino_t|d_ino|d_fileno|d_namlen
+_dirent_syms_re = $(_de1)|$(_de2)|$(_de3)
+# Prohibit the inclusion of dirent.h without an actual use.
+sc_prohibit_dirent_without_use:
+	@h='dirent.h'							\
+	re='\<($(_dirent_syms_re))\>'					\
+	  $(_sc_header_without_use)
+
+# Prohibit the inclusion of verify.h without an actual use.
+sc_prohibit_verify_without_use:
+	@h='verify.h'							\
+	re='\<(verify(true|expr)?|assume|static_assert) *\('		\
+	  $(_sc_header_without_use)
+
+# Don't include xfreopen.h unless you use one of its functions.
+sc_prohibit_xfreopen_without_use:
+	@h='xfreopen.h' re='\<xfreopen *\(' $(_sc_header_without_use)
+
+sc_obsolete_symbols:
+	@prohibit='\<(HAVE''_FCNTL_H|O''_NDELAY)\>'			\
+	halt='do not use HAVE''_FCNTL_H or O'_NDELAY			\
+	  $(_sc_search_regexp)
+
+# FIXME: warn about definitions of EXIT_FAILURE, EXIT_SUCCESS, STREQ
+
+# Each nonempty ChangeLog line must start with a year number, or a TAB.
+sc_changelog:
+	@prohibit='^[^12	]'					\
+	in_vc_files='^ChangeLog$$'					\
+	halt='found unexpected prefix in a ChangeLog'			\
+	  $(_sc_search_regexp)
+
+# Ensure that each .c file containing a "main" function also
+# calls bindtextdomain.
+sc_bindtextdomain:
+	@require='bindtextdomain *\('					\
+	in_vc_files='\.c$$'						\
+	containing='\<main *('						\
+	halt='the above files do not call bindtextdomain'		\
+	  $(_sc_search_regexp)
+
+# Require that the final line of each test-lib.sh-using test be this one:
+# Exit $fail
+# Note: this test requires GNU grep's --label= option.
+Exit_witness_file ?= tests/test-lib.sh
+Exit_base := $(notdir $(Exit_witness_file))
+sc_require_test_exit_idiom:
+	@if test -f $(srcdir)/$(Exit_witness_file); then		\
+	  die=0;							\
+	  for i in $$($(GREP) -l -F 'srcdir/$(Exit_base)'		\
+		$$($(VC_LIST) tests)); do				\
+	    tail -n1 $$i | $(GREP) '^Exit .' > /dev/null		\
+	      && : || { die=1; echo $$i; }				\
+	  done;								\
+	  test $$die = 1 &&						\
+	    { echo 1>&2 '$(ME): the final line in each of the above is not:'; \
+	      echo 1>&2 'Exit something';				\
+	      exit 1; } || :;						\
+	fi
+
+sc_trailing_blank:
+	@prohibit='[	 ]$$'						\
+	halt='found trailing blank(s)'					\
+	exclude='^Binary file .* matches$$'				\
+	  $(_sc_search_regexp)
+
+# Match lines like the following, but where there is only one space
+# between the options and the description:
+#   -D, --all-repeated[=delimit-method]  print all duplicate lines\n
+longopt_re = --[a-z][0-9A-Za-z-]*(\[?=[0-9A-Za-z-]*\]?)?
+sc_two_space_separator_in_usage:
+	@prohibit='^   *(-[A-Za-z],)? $(longopt_re) [^ ].*\\$$'		\
+	halt='help2man requires at least two spaces between an option and its description'\
+	  $(_sc_search_regexp)
+
+# A regexp matching function names like "error" that may be used
+# to emit translatable messages.
+_gl_translatable_diag_func_re ?= error
+
+# Look for diagnostics that aren't marked for translation.
+# This won't find any for which error's format string is on a separate line.
+sc_unmarked_diagnostics:
+	@prohibit='\<$(_gl_translatable_diag_func_re) *\([^"]*"[^"]*[a-z]{3}' \
+	exclude='(_|ngettext ?)\('					\
+	halt='found unmarked diagnostic(s)'				\
+	  $(_sc_search_regexp)
+
+# Avoid useless parentheses like those in this example:
+# #if defined (SYMBOL) || defined (SYM2)
+sc_useless_cpp_parens:
+	@prohibit='^# *if .*defined *\('				\
+	halt='found useless parentheses in cpp directive'		\
+	  $(_sc_search_regexp)
+
+# List headers for which HAVE_HEADER_H is always true, assuming you are
+# using the appropriate gnulib module.  CAUTION: for each "unnecessary"
+# #if HAVE_HEADER_H that you remove, be sure that your project explicitly
+# requires the gnulib module that guarantees the usability of that header.
+gl_assured_headers_ = \
+  cd $(gnulib_dir)/lib && echo *.in.h|$(SED) 's/\.in\.h//g'
+
+# Convert the list of names to upper case, and replace each space with "|".
+az_ = abcdefghijklmnopqrstuvwxyz
+AZ_ = ABCDEFGHIJKLMNOPQRSTUVWXYZ
+gl_header_upper_case_or_ =						\
+  $$($(gl_assured_headers_)						\
+    | tr $(az_)/.- $(AZ_)___						\
+    | tr -s ' ' '|'							\
+    )
+sc_prohibit_always_true_header_tests:
+	@or=$(gl_header_upper_case_or_);				\
+	re="HAVE_($$or)_H";						\
+	prohibit='\<'"$$re"'\>'						\
+	halt=$$(printf '%s\n'						\
+	'do not test the above HAVE_<header>_H symbol(s);'		\
+	'  with the corresponding gnulib module, they are always true')	\
+	  $(_sc_search_regexp)
+
+sc_prohibit_defined_have_decl_tests:
+	@prohibit='(#[	 ]*ifn?def|\<defined)\>[	 (]+HAVE_DECL_'	\
+	halt='HAVE_DECL macros are always defined'			\
+	  $(_sc_search_regexp)
+
+# ==================================================================
+gl_other_headers_ ?= \
+  intprops.h	\
+  openat.h	\
+  stat-macros.h
+
+# Perl -lne code to extract "significant" cpp-defined symbols from a
+# gnulib header file, eliminating a few common false-positives.
+# The exempted names below are defined only conditionally in gnulib,
+# and hence sometimes must/may be defined in application code.
+gl_extract_significant_defines_ = \
+  /^\# *define ([^_ (][^ (]*)(\s*\(|\s+\w+)/\
+    && $$2 !~ /(?:rpl_|_used_without_)/\
+    && $$1 !~ /^(?:NSIG|ENODATA)$$/\
+    && $$1 !~ /^(?:SA_RESETHAND|SA_RESTART)$$/\
+    and print $$1
+
+# Create a list of regular expressions matching the names
+# of macros that are guaranteed to be defined by parts of gnulib.
+define def_sym_regex
+	gen_h=$(gl_generated_headers_);					\
+	(cd $(gnulib_dir)/lib;						\
+	  for f in *.in.h $(gl_other_headers_); do			\
+	    test -f $$f							\
+	      && perl -lne '$(gl_extract_significant_defines_)' $$f;	\
+	  done;								\
+	) | sort -u							\
+	  | $(SED) 's/^/^ *# *(define|undef)  */;s/$$/\\>/'
+endef
+
+# Don't define macros that we already get from gnulib header files.
+sc_prohibit_always-defined_macros:
+	@if test -d $(gnulib_dir); then					\
+	  case $$(echo all: | $(GREP) -l -f - Makefile) in Makefile);; *) \
+	    echo '$(ME): skipping $@: you lack GNU grep' 1>&2; exit 0;;	\
+	  esac;								\
+	  regex=$$($(def_sym_regex)); export regex;			\
+	  $(VC_LIST_EXCEPT)						\
+	    | xargs sh -c 'echo $$regex | $(GREP) -E -f - "$$@"'	\
+		dummy /dev/null						\
+	    && { printf '$(ME): define the above'			\
+			' via some gnulib .h file\n' 1>&2;		\
+		 exit 1; }						\
+	    || :;							\
+	fi
+# ==================================================================
+
+# Prohibit checked in backup files.
+sc_prohibit_backup_files:
+	@$(VC_LIST) | $(GREP) '~$$' &&					\
+	  { echo '$(ME): found version controlled backup file' 1>&2;	\
+	    exit 1; } || :
+
+# Require the latest GPL.
+sc_GPL_version:
+	@prohibit='either ''version [^3]'				\
+	halt='GPL vN, N!=3'						\
+	  $(_sc_search_regexp)
+
+# Require the latest GFDL.  Two regexp, since some .texi files end up
+# line wrapping between 'Free Documentation License,' and 'Version'.
+_GFDL_regexp = (Free ''Documentation.*Version 1\.[^3]|Version 1\.[^3] or any)
+sc_GFDL_version:
+	@prohibit='$(_GFDL_regexp)'					\
+	halt='GFDL vN, N!=3'						\
+	  $(_sc_search_regexp)
+
+# Don't use Texinfo's @acronym{}.
+# https://lists.gnu.org/r/bug-gnulib/2010-03/msg00321.html
+texinfo_suffix_re_ ?= \.(txi|texi(nfo)?)$$
+sc_texinfo_acronym:
+	@prohibit='@acronym\{'						\
+	in_vc_files='$(texinfo_suffix_re_)'				\
+	halt='found use of Texinfo @acronym{}'				\
+	  $(_sc_search_regexp)
+
+cvs_keywords = \
+  Author|Date|Header|Id|Name|Locker|Log|RCSfile|Revision|Source|State
+
+sc_prohibit_cvs_keyword:
+	@prohibit='\$$($(cvs_keywords))\$$'				\
+	halt='do not use CVS keyword expansion'				\
+	  $(_sc_search_regexp)
+
+# This Perl code is slightly obfuscated.  Not only is each "$" doubled
+# because it's in a Makefile, but the $$c's are comments;  we cannot
+# use "#" due to the way the script ends up concatenated onto one line.
+# It would be much more concise, and would produce better output (including
+# counts) if written as:
+#   perl -ln -0777 -e '/\n(\n+)$/ and print "$ARGV: ".length $1' ...
+# but that would be far less efficient, reading the entire contents
+# of each file, rather than just the last two bytes of each.
+# In addition, while the code below detects both blank lines and a missing
+# newline at EOF, the above detects only the former.
+#
+# This is a perl script that is expected to be the single-quoted argument
+# to a command-line "-le".  The remaining arguments are file names.
+# Print the name of each file that does not end in exactly one newline byte.
+# I.e., warn if there are blank lines (2 or more newlines), or if the
+# last byte is not a newline.  However, currently we don't complain
+# about any file that contains exactly one byte.
+# Exit nonzero if at least one such file is found, otherwise, exit 0.
+# Warn about, but otherwise ignore open failure.  Ignore seek/read failure.
+#
+# Use this if you want to remove trailing empty lines from selected files:
+#   perl -pi -0777 -e 's/\n\n+$/\n/' files...
+#
+require_exactly_one_NL_at_EOF_ =					\
+  foreach my $$f (@ARGV)						\
+    {									\
+      open F, "<", $$f or (warn "failed to open $$f: $$!\n"), next;	\
+      my $$p = sysseek (F, -2, 2);					\
+      my $$c = "seek failure probably means file has < 2 bytes; ignore"; \
+      my $$last_two_bytes;						\
+      defined $$p and $$p = sysread F, $$last_two_bytes, 2;		\
+      close F;								\
+      $$c = "ignore read failure";					\
+      $$p && ($$last_two_bytes eq "\n\n"				\
+              || substr ($$last_two_bytes,1) ne "\n")			\
+          and (print $$f), $$fail=1;					\
+    }									\
+  END { exit defined $$fail }
+sc_prohibit_empty_lines_at_EOF:
+	@$(VC_LIST_EXCEPT)						\
+	  | xargs perl -le '$(require_exactly_one_NL_at_EOF_)'		\
+	  || { echo '$(ME): empty line(s) or no newline at EOF' 1>&2;	\
+	       exit 1; }						\
+	  || :
+
+# Make sure we don't use st_blocks.  Use ST_NBLOCKS instead.
+# This is a bit of a kludge, since it prevents use of the string
+# even in comments, but for now it does the job with no false positives.
+sc_prohibit_stat_st_blocks:
+	@prohibit='[.>]st_blocks'					\
+	halt='do not use st_blocks; use ST_NBLOCKS'			\
+	  $(_sc_search_regexp)
+
+# Make sure we don't define any S_IS* macros in src/*.c files.
+# They're already defined via gnulib's sys/stat.h replacement.
+sc_prohibit_S_IS_definition:
+	@prohibit='^ *# *define  *S_IS'					\
+	halt='do not define S_IS* macros; include <sys/stat.h>'		\
+	  $(_sc_search_regexp)
+
+# Perl block to convert a match to FILE_NAME:LINENO:TEST,
+# that is shared by two definitions below.
+perl_filename_lineno_text_ =						\
+    -e '  {'								\
+    -e '    $$n = ($$` =~ tr/\n/\n/ + 1);'				\
+    -e '    ($$v = $$&) =~ s/\n/\\n/g;'					\
+    -e '    print "$$ARGV:$$n:$$v\n";'					\
+    -e '  }'
+
+prohibit_doubled_words_ = \
+    the then in an on if is it but for or at and do to
+# expand the regex before running the check to avoid using expensive captures
+prohibit_doubled_word_expanded_ = \
+    $(join $(prohibit_doubled_words_),$(addprefix \s+,$(prohibit_doubled_words_)))
+prohibit_doubled_word_RE_ ?= \
+    /\b(?:$(subst $(_sp),|,$(prohibit_doubled_word_expanded_)))\b/gims
+prohibit_doubled_word_ =						\
+    -e 'while ($(prohibit_doubled_word_RE_))'				\
+    $(perl_filename_lineno_text_)
+
+# Define this to a regular expression that matches
+# any filename:dd:match lines you want to ignore.
+# The default is to ignore no matches.
+ignore_doubled_word_match_RE_ ?= ^$$
+
+sc_prohibit_doubled_word:
+	@$(VC_LIST_EXCEPT)						\
+	  | xargs perl -n -0777 $(prohibit_doubled_word_)		\
+	  | $(GREP) -vE '$(ignore_doubled_word_match_RE_)'		\
+	  | $(GREP) .							\
+	  && { echo '$(ME): doubled words' 1>&2; exit 1; }		\
+	  || :
+
+# A regular expression matching undesirable combinations of words like
+# "can not"; this matches them even when the two words appear on different
+# lines, but not when there is an intervening delimiter like "#" or "*".
+# Similarly undesirable, "See @xref{...}", since an @xref should start
+# a sentence.  Explicitly prohibit any prefix of "see" or "also".
+# Also prohibit a prefix matching "\w+ +".
+# @pxref gets the same see/also treatment and should be parenthesized;
+# presume it must *not* start a sentence.
+# POSIX spells it "timestamp" rather than "time\s+stamp", so we do, too.
+bad_xref_re_ ?= (?:[\w,:;] +|(?:see|also)\s+)\@xref\{
+bad_pxref_re_ ?= (?:[.!?]|(?:see|also))\s+\@pxref\{
+prohibit_undesirable_word_seq_RE_ ?=					\
+  /(?:\bcan\s+not\b|\btime\s+stamps?\b|$(bad_xref_re_)|$(bad_pxref_re_))/gims
+prohibit_undesirable_word_seq_ =					\
+    -e 'while ($(prohibit_undesirable_word_seq_RE_))'			\
+    $(perl_filename_lineno_text_)
+# Define this to a regular expression that matches
+# any filename:dd:match lines you want to ignore.
+# The default is to ignore no matches.
+ignore_undesirable_word_sequence_RE_ ?= ^$$
+
+sc_prohibit_undesirable_word_seq:
+	@$(VC_LIST_EXCEPT)						\
+	  | xargs perl -n -0777 $(prohibit_undesirable_word_seq_)	\
+	  | $(GREP) -vE '$(ignore_undesirable_word_sequence_RE_)'	\
+	  | $(GREP) .							\
+	  && { echo '$(ME): undesirable word sequence' >&2; exit 1; }   \
+	  || :
+
+# Except for shell files and for loops, double semicolon is probably a mistake
+sc_prohibit_double_semicolon:
+	@prohibit='; *;[	{} \]*(/[/*]|$$)'			\
+	in_vc_files='\.[chly]$$'					\
+	exclude='\bfor *\(.*\)'						\
+	halt="Double semicolon detected"				\
+	  $(_sc_search_regexp)
+
+_ptm1 = use "test C1 && test C2", not "test C1 -''a C2"
+_ptm2 = use "test C1 || test C2", not "test C1 -''o C2"
+# Using test's -a and -o operators is not portable.
+# We prefer test over [, since the latter is spelled [[ in configure.ac.
+sc_prohibit_test_minus_ao:
+	@prohibit='(\<test| \[+) .+ -[ao] '				\
+	halt='$(_ptm1); $(_ptm2)'					\
+	  $(_sc_search_regexp)
+
+# Avoid a test bashism.
+sc_prohibit_test_double_equal:
+	@prohibit='(\<test| \[+) .+ == '				\
+	containing='#! */bin/[a-z]*sh'					\
+	halt='use "test x = x", not "test x =''= x"'			\
+	  $(_sc_search_regexp)
+
+# Each program that uses proper_name_utf8 must link with one of the
+# ICONV libraries.  Otherwise, some ICONV library must appear in LDADD.
+# The perl -0777 invocation below extracts the possibly-multi-line
+# definition of LDADD from the appropriate Makefile.am and exits 0
+# when it contains "ICONV".
+sc_proper_name_utf8_requires_ICONV:
+	@progs=$$($(VC_LIST_EXCEPT)					\
+		    | xargs $(GREP) -l 'proper_name_utf8 ''("');	\
+	if test "x$$progs" != x; then					\
+	  fail=0;							\
+	  for p in $$progs; do						\
+	    dir=$$(dirname "$$p");					\
+	    perl -0777							\
+	      -ne 'exit !(/^LDADD =(.+?[^\\]\n)/ms && $$1 =~ /ICONV/)'	\
+	      $$dir/Makefile.am && continue;				\
+	    base=$$(basename "$$p" .c);					\
+	    $(GREP) "$${base}_LDADD.*ICONV)" $$dir/Makefile.am > /dev/null	\
+	      || { fail=1; echo 1>&2 "$(ME): $$p uses proper_name_utf8"; }; \
+	  done;								\
+	  test $$fail = 1 &&						\
+	    { echo 1>&2 '$(ME): the above do not link with any ICONV library'; \
+	      exit 1; } || :;						\
+	fi
+
+# Warn about "c0nst struct Foo const foo[]",
+# but not about "char const *const foo" or "#define const const".
+sc_redundant_const:
+	@prohibit='\bconst\b[[:space:][:alnum:]]{2,}\bconst\b'		\
+	halt='redundant "const" in declarations'			\
+	  $(_sc_search_regexp)
+
+sc_const_long_option:
+	@prohibit='^ *static.*struct option '				\
+	exclude='const struct option|struct option const'		\
+	halt='add "const" to the above declarations'			\
+	  $(_sc_search_regexp)
+
+NEWS_hash =								\
+  $$($(SED) -n '/^\*.* $(PREV_VERSION_REGEXP) ([0-9-]*)/,$$p'		\
+       $(srcdir)/NEWS							\
+     | perl -0777 -pe							\
+	's/^Copyright.+?Free\sSoftware\sFoundation,\sInc\.\n//ms'	\
+     | md5sum -								\
+     | $(SED) 's/ .*//')
+
+# Ensure that we don't accidentally insert an entry into an old NEWS block.
+sc_immutable_NEWS:
+	@if test -f $(srcdir)/NEWS; then				\
+	  test "$(NEWS_hash)" = '$(old_NEWS_hash)' && : ||		\
+	    { echo '$(ME): you have modified old NEWS' 1>&2; exit 1; };	\
+	fi
+
+# Update the hash stored above.  Do this after each release and
+# for any corrections to old entries.
+update-NEWS-hash: NEWS
+	perl -pi -e 's/^(old_NEWS_hash[ \t]+:?=[ \t]+).*/$${1}'"$(NEWS_hash)/" \
+	  $(srcdir)/cfg.mk
+
+# Ensure that we use only the standard $(VAR) notation,
+# not @...@ in Makefile.am, now that we can rely on automake
+# to emit a definition for each substituted variable.
+# However, there is still one case in which @VAR@ use is not just
+# legitimate, but actually required: when augmenting an automake-defined
+# variable with a prefix.  For example, gettext uses this:
+# MAKEINFO = env LANG= LC_MESSAGES= LC_ALL= LANGUAGE= @MAKEINFO@
+# otherwise, makeinfo would put German or French (current locale)
+# navigation hints in the otherwise-English documentation.
+#
+# Allow the package to add exceptions via a hook in cfg.mk;
+# for example, @PRAGMA_SYSTEM_HEADER@ can be permitted by
+# setting this to ' && !/PRAGMA_SYSTEM_HEADER/'.
+_makefile_at_at_check_exceptions ?=
+sc_makefile_at_at_check:
+	@perl -ne '/\@\w+\@/'						\
+          -e ' && !/(\w+)\s+=.*\@\1\@$$/'				\
+          -e ''$(_makefile_at_at_check_exceptions)			\
+	  -e 'and (print "$$ARGV:$$.: $$_"), $$m=1; END {exit !$$m}'	\
+	    $$($(VC_LIST_EXCEPT) | $(GREP) -E '(^|/)(Makefile\.am|[^/]+\.mk)$$') \
+	  && { echo '$(ME): use $$(...), not @...@' 1>&2; exit 1; } || :
+
+news-check: NEWS
+	$(AM_V_GEN)if $(SED) -n $(news-check-lines-spec)p $<		\
+	    | $(GREP) -E $(news-check-regexp) >/dev/null; then		\
+	  :;								\
+	else								\
+	  echo 'NEWS: $$(news-check-regexp) failed to match' 1>&2;	\
+	  exit 1;							\
+	fi
+
+sc_makefile_TAB_only_indentation:
+	@prohibit='^	[ ]{8}'						\
+	in_vc_files='akefile|\.mk$$'					\
+	halt='found TAB-8-space indentation'				\
+	  $(_sc_search_regexp)
+
+sc_m4_quote_check:
+	@prohibit='(AC_DEFINE(_UNQUOTED)?|AC_DEFUN)\([^[]'		\
+	in_vc_files='(^configure\.ac|\.m4)$$'				\
+	halt='quote the first arg to AC_DEF*'				\
+	  $(_sc_search_regexp)
+
+fix_po_file_diag = \
+'you have changed the set of files with translatable diagnostics;\n\
+apply the above patch\n'
+
+# Generate a list of files in which to search for translatable strings.
+perl_translatable_files_list_ =						\
+  -e 'foreach $$file (@ARGV) {'						\
+  -e '	\# Consider only file extensions with one or two letters'	\
+  -e '	$$file =~ /\...?$$/ or next;'					\
+  -e '	\# Ignore m4 and mk files'					\
+  -e '	$$file =~ /\.m[4k]$$/ and next;'				\
+  -e '	\# Ignore a .c or .h file with a corresponding .l or .y file'	\
+  -e '	$$file =~ /(.+)\.[ch]$$/ && (-e "$${1}.l" || -e "$${1}.y")'	\
+  -e '	  and next;'							\
+  -e '	\# Skip unreadable files'					\
+  -e '	-r $$file or next;'						\
+  -e '	print "$$file ";'						\
+  -e '}'
+
+# Verify that all source files using _() (more specifically, files that
+# match $(_gl_translatable_string_re)) are listed in po/POTFILES.in.
+po_file ?= $(srcdir)/po/POTFILES.in
+generated_files ?= $(srcdir)/lib/*.[ch]
+_gl_translatable_string_re ?= \b(N?_|gettext *)\([^)"]*("|$$)
+sc_po_check:
+	@if test -f $(po_file); then					\
+	  $(GREP) -E -v '^(#|$$)' $(po_file)				\
+	    | $(GREP) -v '^src/false\.c$$' | sort > $@-1;		\
+	  { $(VC_LIST_EXCEPT); echo $(generated_files); }		\
+	    | xargs perl $(perl_translatable_files_list_)		\
+	    | xargs $(GREP) -E -l '$(_gl_translatable_string_re)'	\
+	    | $(SED) 's|^$(_dot_escaped_srcdir)/||'			\
+	    | sort -u > $@-2;						\
+	  diff -u -L $(po_file) -L $(po_file) $@-1 $@-2			\
+	    || { printf '$(ME): '$(fix_po_file_diag) 1>&2; exit 1; };	\
+	  rm -f $@-1 $@-2;						\
+	fi
+
+# Sometimes it is useful to change the PATH environment variable
+# in Makefiles.  When doing so, it's better not to use the Unix-centric
+# path separator of ':', but rather the automake-provided '$(PATH_SEPARATOR)'.
+msg = 'Do not use ":" above; use $$(PATH_SEPARATOR) instead'
+sc_makefile_path_separator_check:
+	@prohibit='PATH[=].*:'						\
+	in_vc_files='akefile|\.mk$$'					\
+	halt=$(msg)							\
+	  $(_sc_search_regexp)
+
+# Check that 'make alpha' will not fail at the end of the process,
+# i.e., when pkg-M.N.tar.xz already exists (either in "." or in ../release)
+# and is read-only.
+writable-files:
+	$(AM_V_GEN)if test -d $(release_archive_dir); then		\
+	  for file in $(DIST_ARCHIVES); do				\
+	    for p in ./ $(release_archive_dir)/; do			\
+	      test -e $$p$$file || continue;				\
+	      test -w $$p$$file						\
+		|| { echo ERROR: $$p$$file is not writable; fail=1; };	\
+	    done;							\
+	  done;								\
+	  test "$$fail" && exit 1 || : ;				\
+	else :;								\
+	fi
+
+v_etc_file = $(gnulib_dir)/lib/version-etc.c
+sample-test = tests/sample-test
+texi = doc/$(PACKAGE).texi
+# Make sure that the copyright date in $(v_etc_file) is up to date.
+# Do the same for the $(sample-test) and the main doc/.texi file.
+sc_copyright_check:
+	@require='enum { COPYRIGHT_YEAR = '$$(date +%Y)' };'		\
+	in_files=$(v_etc_file)						\
+	halt='out of date copyright in $(v_etc_file); update it'	\
+	  $(_sc_search_regexp)
+	@require='# Copyright \(C\) '$$(date +%Y)' Free'		\
+	in_vc_files=$(sample-test)					\
+	halt='out of date copyright in $(sample-test); update it'	\
+	  $(_sc_search_regexp)
+	@require='Copyright @copyright\{\} .*'$$(date +%Y)		\
+	in_vc_files=$(texi)						\
+	halt='out of date copyright in $(texi); update it'		\
+	  $(_sc_search_regexp)
+
+# If tests/help-version exists and seems to be new enough, assume that its
+# use of init.sh and path_prepend_ is correct, and ensure that every other
+# use of init.sh is identical.
+# This is useful because help-version cross-checks prog --version
+# with $(VERSION), which verifies that its path_prepend_ invocation
+# sets PATH correctly.  This is an inexpensive way to ensure that
+# the other init.sh-using tests also get it right.
+_hv_file ?= $(srcdir)/tests/help-version
+_hv_regex_weak ?= ^ *\. .*/init\.sh"
+# Fix syntax-highlighters "
+_hv_regex_strong ?= ^ *\. "\$${srcdir=\.}/init\.sh"
+sc_cross_check_PATH_usage_in_tests:
+	@if test -f $(_hv_file); then					\
+	  $(GREP) -l 'VERSION mismatch' $(_hv_file) >/dev/null		\
+	    || { echo "$@: skipped: no such file: $(_hv_file)" 1>&2;	\
+		 exit 0; };						\
+	  $(GREP) -lE '$(_hv_regex_strong)' $(_hv_file) >/dev/null	\
+	    || { echo "$@: $(_hv_file) lacks conforming use of init.sh" 1>&2; \
+		 exit 1; };						\
+	  good=$$($(GREP) -E '$(_hv_regex_strong)' $(_hv_file));	\
+	  $(VC_LIST_EXCEPT)						\
+	    | xargs $(GREP) -lE '$(_hv_regex_weak)'			\
+	    | xargs $(GREP) -LFx "$$good"				\
+	    | $(GREP) .							\
+	    && { printf "$(ME): the above files use"			\
+			" path_prepend_ inconsistently\n" 1>&2;		\
+		 exit 1; }						\
+	    || :;							\
+	fi
+
+# BRE regex of file contents to identify a test script.
+_test_script_regex ?= \<init\.sh\>
+
+# In tests, use "compare expected actual", not the reverse.
+sc_prohibit_reversed_compare_failure:
+	@prohibit='\<compare [^ ]+ ([^ ]*exp|/dev/null)'		\
+	containing='$(_test_script_regex)'				\
+	halt='reversed compare arguments'				\
+	  $(_sc_search_regexp)
+
+# #if HAVE_... will evaluate to false for any non numeric string.
+# That would be flagged by using -Wundef, however gnulib currently
+# tests many undefined macros, and so we can't enable that option.
+# So at least preclude common boolean strings as macro values.
+sc_Wundef_boolean:
+	@prohibit='^#define.*(yes|no|true|false)$$'			\
+	in_files='$(CONFIG_INCLUDE)'					\
+	halt='Use 0 or 1 for macro values'				\
+	  $(_sc_search_regexp)
+
+# Even if you use pathmax.h to guarantee that PATH_MAX is defined, it might
+# not be constant, or might overflow a stack.  In general, use PATH_MAX as
+# a limit, not an array or alloca size.
+sc_prohibit_path_max_allocation:
+	@prohibit='(\balloca *\([^)]*|\[[^]]*)\bPATH_MAX'		\
+	halt='Avoid stack allocations of size PATH_MAX'			\
+	  $(_sc_search_regexp)
+
+sc_vulnerable_makefile_CVE-2009-4029:
+	@prohibit='perm -777 -exec chmod a\+rwx|chmod 777 \$$\(distdir\)' \
+	in_files='(^|/)Makefile\.in$$'					\
+	halt=$$(printf '%s\n'						\
+	  'the above files are vulnerable; beware of running'		\
+	  '  "make dist*" rules, and upgrade to fixed automake'		\
+	  '  see https://bugzilla.redhat.com/show_bug.cgi?id=542609 for details') \
+	  $(_sc_search_regexp)
+
+sc_vulnerable_makefile_CVE-2012-3386:
+	@prohibit='chmod a\+w \$$\(distdir\)'				\
+	in_files='(^|/)Makefile\.in$$'					\
+	halt=$$(printf '%s\n'						\
+	  'the above files are vulnerable; beware of running'		\
+	  '  "make distcheck", and upgrade to fixed automake'		\
+	  '  see https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-3386 for details') \
+	  $(_sc_search_regexp)
+
+vc-diff-check:
+	$(AM_V_GEN)(unset CDPATH; cd $(srcdir) && $(VC) diff) > vc-diffs || :
+	$(AM_V_at)if test -s vc-diffs; then			\
+	  cat vc-diffs;						\
+	  echo "Some files are locally modified:" 1>&2;		\
+	  exit 1;						\
+	else							\
+	  rm vc-diffs;						\
+	fi
+
+rel-files = $(DIST_ARCHIVES)
+
+gnulib-version = $$(cd $(gnulib_dir)				\
+                    && { git describe || git rev-parse --short=10 HEAD; } )
+bootstrap-tools ?= autoconf,automake,gnulib
+
+gpgv = $$(gpgv2 --version >/dev/null && echo gpgv2 || echo gpgv)
+# If it's not already specified, derive the GPG key ID from
+# the signed tag we've just applied to mark this release.
+gpg_key_ID ?=								\
+  $$(cd $(srcdir)							\
+     && git cat-file tag v$(VERSION)					\
+        | $(gpgv) --status-fd 1 --keyring /dev/null - - 2>/dev/null	\
+        | $(AWK) '/^\[GNUPG:\] ERRSIG / {print $$3; exit}')
+
+translation_project_ ?= coordinator@translationproject.org
+
+# Make info-gnu the default only for a stable release.
+announcement_Cc_stable = $(translation_project_), $(PACKAGE_BUGREPORT)
+announcement_mail_headers_stable =		\
+  To: info-gnu@gnu.org				\
+  Cc: $(announcement_Cc_)			\
+  Mail-Followup-To: $(PACKAGE_BUGREPORT)
+
+announcement_Cc_alpha = $(translation_project_)
+announcement_mail_headers_alpha =		\
+  To: $(PACKAGE_BUGREPORT)			\
+  Cc: $(announcement_Cc_)
+
+announcement_mail_Cc_beta = $(announcement_mail_Cc_alpha)
+announcement_mail_headers_beta = $(announcement_mail_headers_alpha)
+
+announcement_Cc_ ?= $(announcement_Cc_$(release-type))
+announcement_mail_headers_ ?= $(announcement_mail_headers_$(release-type))
+announcement: NEWS ChangeLog $(rel-files)
+# Not $(AM_V_GEN) since the output of this command serves as
+# announcement message: it would start with " GEN announcement".
+	$(AM_V_at)$(srcdir)/$(_build-aux)/announce-gen			\
+	    --mail-headers='$(announcement_mail_headers_)'		\
+	    --release-type=$(release-type)				\
+	    --package=$(PACKAGE)					\
+	    --prev=$(PREV_VERSION)					\
+	    --curr=$(VERSION)						\
+	    --gpg-key-id=$(gpg_key_ID)					\
+	    --srcdir=$(srcdir)						\
+	    --news=$(srcdir)/NEWS					\
+	    --bootstrap-tools=$(bootstrap-tools)			\
+	    $$(case ,$(bootstrap-tools), in (*,gnulib,*)		\
+	       echo --gnulib-version=$(gnulib-version);; esac)		\
+	    $(addprefix --url-dir=, $(url_dir_list))
+
+.PHONY: release-commit
+release-commit:
+	$(AM_V_GEN)cd $(srcdir)				\
+	  && $(_build-aux)/do-release-commit-and-tag	\
+	       -C $(abs_builddir) $(RELEASE)
+
+## ---------------- ##
+## Updating files.  ##
+## ---------------- ##
+
+ftp-gnu = https://ftp.gnu.org/gnu
+www-gnu = https://www.gnu.org
+
+upload_dest_dir_ ?= $(PACKAGE)
+upload_command =						\
+  $(srcdir)/$(_build-aux)/gnupload $(GNUPLOADFLAGS)		\
+  --to $(gnu_rel_host):$(upload_dest_dir_)			\
+  $(rel-files)
+emit_upload_commands:
+	@echo =====================================
+	@echo =====================================
+	@echo '$(upload_command)'
+	@echo '# send the ~/announce-$(my_distdir) e-mail'
+	@echo =====================================
+	@echo =====================================
+
+.PHONY: upload
+upload:
+	$(AM_V_GEN)$(upload_command)
+
+define emit-commit-log
+  printf '%s\n' 'maint: post-release administrivia' ''			\
+    '* NEWS: Add header line for next release.'				\
+    '* .prev-version: Record previous version.'				\
+    '* cfg.mk (old_NEWS_hash): Auto-update.'
+endef
+
+.PHONY: no-submodule-changes
+no-submodule-changes:
+	$(AM_V_GEN)if test -d $(srcdir)/.git				\
+		&& git --version >/dev/null 2>&1; then			\
+	  diff=$$(cd $(srcdir) && git submodule -q foreach		\
+		  git diff-index --name-only HEAD)			\
+	    || exit 1;							\
+	  case $$diff in '') ;;						\
+	    *) echo '$(ME): submodule files are locally modified:';	\
+		echo "$$diff"; exit 1;; esac;				\
+	else								\
+	  : ;								\
+	fi
+
+submodule-checks ?= no-submodule-changes public-submodule-commit
+
+# Ensure that each sub-module commit we're using is public.
+# Without this, it is too easy to tag and release code that
+# cannot be built from a fresh clone.
+.PHONY: public-submodule-commit
+public-submodule-commit:
+	$(AM_V_GEN)if test -d $(srcdir)/.git				\
+		&& git --version >/dev/null 2>&1; then			\
+	  cd $(srcdir) &&						\
+	  git submodule --quiet foreach					\
+	      'test "$$(git rev-parse "$$sha1")"			\
+		  = "$$(git merge-base origin "$$sha1")"'		\
+	    || { echo '$(ME): found non-public submodule commit' >&2;	\
+		 exit 1; };						\
+	else								\
+	  : ;								\
+	fi
+# This rule has a high enough utility/cost ratio that it should be a
+# dependent of "check" by default.  However, some of us do occasionally
+# commit a temporary change that deliberately points to a non-public
+# submodule commit, and want to be able to use rules like "make check".
+# In that case, run e.g., "make check gl_public_submodule_commit="
+# to disable this test.
+gl_public_submodule_commit ?= public-submodule-commit
+check: $(gl_public_submodule_commit)
+
+.PHONY: alpha beta stable release
+ALL_RECURSIVE_TARGETS += alpha beta stable
+alpha beta stable: $(local-check) writable-files $(submodule-checks)
+	$(AM_V_GEN)test $@ = stable					\
+	  && { echo $(VERSION) | $(GREP) -E '^[0-9]+(\.[0-9]+)+$$'	\
+	       || { echo "invalid version string: $(VERSION)" 1>&2; exit 1;};}\
+	  || :
+	$(AM_V_at)$(MAKE) vc-diff-check
+	$(AM_V_at)$(MAKE) news-check
+	$(AM_V_at)$(MAKE) distcheck
+	$(AM_V_at)$(MAKE) dist
+	$(AM_V_at)$(MAKE) $(release-prep-hook) RELEASE_TYPE=$@
+	$(AM_V_at)$(MAKE) -s emit_upload_commands RELEASE_TYPE=$@
+
+release:
+	$(AM_V_GEN)$(MAKE) _version
+	$(AM_V_GEN)$(MAKE) $(release-type)
+
+# Override this in cfg.mk if you follow different procedures.
+release-prep-hook ?= release-prep
+
+gl_noteworthy_news_ = * Noteworthy changes in release ?.? (????-??-??) [?]
+.PHONY: release-prep
+release-prep:
+	$(AM_V_GEN)$(MAKE) --no-print-directory -s announcement \
+	  > ~/announce-$(my_distdir)
+	$(AM_V_at)if test -d $(release_archive_dir); then	\
+	  ln $(rel-files) $(release_archive_dir);		\
+	  chmod a-w $(rel-files);				\
+	fi
+	$(AM_V_at)echo $(VERSION) > $(prev_version_file)
+	$(AM_V_at)$(MAKE) update-NEWS-hash
+	$(AM_V_at)perl -pi						\
+	  -e '$$. == 3 and print "$(gl_noteworthy_news_)\n\n\n"'	\
+	  $(srcdir)/NEWS
+	$(AM_V_at)msg=$$($(emit-commit-log)) || exit 1;		\
+	cd $(srcdir) && $(VC) commit -m "$$msg" -a
+
+# Override this with e.g., -s $(srcdir)/some_other_name.texi
+# if the default $(PACKAGE)-derived name doesn't apply.
+gendocs_options_ ?=
+
+.PHONY: web-manual
+web-manual:
+	$(AM_V_GEN)test -z "$(manual_title)" \
+	  && { echo define manual_title in cfg.mk 1>&2; exit 1; } || :
+	$(AM_V_at)cd '$(srcdir)/doc'; \
+	  $(SHELL) ../$(_build-aux)/gendocs.sh $(gendocs_options_) \
+	     -o '$(abs_builddir)/doc/manual' \
+	     --email $(PACKAGE_BUGREPORT) $(PACKAGE) \
+	    "$(PACKAGE_NAME) - $(manual_title)"
+	$(AM_V_at)echo " *** Upload the doc/manual directory to web-cvs."
+
+.PHONY: web-manual-update
+web-manual-update:
+	$(AM_V_GEN)cd $(srcdir) \
+	  && $(_build-aux)/gnu-web-doc-update -C $(abs_builddir)
+
+
+# Code Coverage
+
+init-coverage:
+	$(MAKE) $(AM_MAKEFLAGS) clean
+	lcov --directory . --zerocounters
+
+COVERAGE_CCOPTS ?= "-g --coverage"
+COVERAGE_OUT ?= doc/coverage
+
+build-coverage:
+	$(MAKE) $(AM_MAKEFLAGS) CFLAGS=$(COVERAGE_CCOPTS) CXXFLAGS=$(COVERAGE_CCOPTS)
+	$(MAKE) $(AM_MAKEFLAGS) CFLAGS=$(COVERAGE_CCOPTS) CXXFLAGS=$(COVERAGE_CCOPTS) check
+	mkdir -p $(COVERAGE_OUT)
+	lcov --directory . --output-file $(COVERAGE_OUT)/$(PACKAGE).info \
+		--capture
+
+gen-coverage:
+	genhtml --output-directory $(COVERAGE_OUT) \
+		$(COVERAGE_OUT)/$(PACKAGE).info \
+		--highlight --frames --legend \
+		--title "$(PACKAGE_NAME)"
+
+coverage:
+	$(MAKE) init-coverage
+	$(MAKE) build-coverage
+	$(MAKE) gen-coverage
+
+# Some projects carry local adjustments for gnulib modules via patches in
+# a gnulib patch directory whose default name is gl/ (defined in bootstrap
+# via local_gl_dir=gl).  Those patches become stale as the originals evolve
+# in gnulib.  Use this rule to refresh any stale patches.  It applies each
+# patch to the original in $(gnulib_dir) and uses the temporary result to
+# generate a fuzz-free .diff file.  If you customize the name of your local
+# gnulib patch directory via bootstrap.conf, this rule detects that name.
+# Run this from a non-VPATH (i.e., srcdir) build directory.
+.PHONY: refresh-gnulib-patches
+refresh-gnulib-patches:
+	gl=gl;								\
+	if test -f bootstrap.conf; then					\
+	  t=$$(perl -lne '/^\s*local_gl_dir=(\S+)/ and $$d=$$1;'	\
+	       -e 'END{defined $$d and print $$d}' bootstrap.conf);	\
+	  test -n "$$t" && gl=$$t;					\
+	fi;								\
+	for diff in $$(cd $$gl; git ls-files | $(GREP) '\.diff$$'); do	\
+	  b=$$(printf %s "$$diff"|$(SED) 's/\.diff$$//');		\
+	  VERSION_CONTROL=none						\
+	    patch "$(gnulib_dir)/$$b" "$$gl/$$diff" || exit 1;		\
+	  ( cd $(gnulib_dir) || exit 1;					\
+	    git diff "$$b" > "../$$gl/$$diff";				\
+	    git checkout $$b ) || exit 1;				\
+	done
+
+# Update gettext files.
+PACKAGE ?= $(shell basename $(PWD))
+PO_DOMAIN ?= $(PACKAGE)
+POURL = https://translationproject.org/latest/$(PO_DOMAIN)/
+PODIR ?= po
+refresh-po:
+	rm -f $(PODIR)/*.po && \
+	echo "$(ME): getting translations into po (please ignore the robots.txt ERROR 404)..." && \
+	wget --no-verbose --directory-prefix $(PODIR) --no-directories --recursive --level 1 --accept .po --accept .po.1 $(POURL) && \
+	echo 'en@boldquot' > $(PODIR)/LINGUAS && \
+	echo 'en@quot' >> $(PODIR)/LINGUAS && \
+	ls $(PODIR)/*.po | $(SED) 's/\.po//;s,$(PODIR)/,,' | \
+	  sort >> $(PODIR)/LINGUAS
+
+ # Running indent once is not idempotent, but running it twice is.
+INDENT_SOURCES ?= $(C_SOURCES)
+.PHONY: indent
+indent:
+	indent $(INDENT_SOURCES)
+	indent $(INDENT_SOURCES)
+
+# If you want to set UPDATE_COPYRIGHT_* environment variables,
+# put the assignments in this variable.
+update-copyright-env ?=
+
+# Run this rule once per year (usually early in January)
+# to update all FSF copyright year lists in your project.
+# If you have an additional project-specific rule,
+# add it in cfg.mk along with a line 'update-copyright: prereq'.
+# By default, exclude all variants of COPYING; you can also
+# add exemptions (such as ChangeLog..* for rotated change logs)
+# in the file .x-update-copyright.
+.PHONY: update-copyright
+update-copyright:
+	$(AM_V_GEN)$(GREP) -l -w Copyright                               \
+	  $$(export VC_LIST_EXCEPT_DEFAULT=COPYING && $(VC_LIST_EXCEPT)) \
+	  | $(update-copyright-env) xargs $(srcdir)/$(_build-aux)/$@
+
+# This tight_scope test is skipped with a warning if $(_gl_TS_headers) is not
+# overridden and $(_gl_TS_dir)/Makefile.am does not mention noinst_HEADERS.
+
+# NOTE: to override any _gl_TS_* default value, you must
+# define the variable(s) using "export" in cfg.mk.
+_gl_TS_dir ?= src
+
+ALL_RECURSIVE_TARGETS += sc_tight_scope
+sc_tight_scope: tight-scope.mk
+	@fail=0;							\
+	if ! $(GREP) '^ *export _gl_TS_headers *=' $(srcdir)/cfg.mk	\
+		> /dev/null						\
+	   && ! $(GREP) -w noinst_HEADERS $(srcdir)/$(_gl_TS_dir)/Makefile.am \
+		> /dev/null 2>&1; then					\
+	    echo '$(ME): skipping $@';					\
+	else								\
+	    $(MAKE) -s -C $(_gl_TS_dir)					\
+		-f Makefile						\
+		-f $(abs_top_srcdir)/cfg.mk				\
+		-f $(abs_top_builddir)/$<				\
+	      _gl_tight_scope						\
+		|| fail=1;						\
+	fi;								\
+	rm -f $<;							\
+	exit $$fail
+
+tight-scope.mk: $(ME)
+	@rm -f $@ $@-t
+	@perl -ne '/^# TS-start/.../^# TS-end/ and print' $(srcdir)/$(ME) > $@-t
+	@chmod a=r $@-t && mv $@-t $@
+
+ifeq (a,b)
+# TS-start
+
+# Most functions should have static scope.
+# Any that don't must be marked with 'extern', but 'main'
+# and 'usage' are exceptions: they're always extern, but
+# do not need to be marked.  Symbols matching '__.*' are
+# reserved by the compiler, so are automatically excluded below.
+_gl_TS_unmarked_extern_functions ?= main usage
+_gl_TS_function_match ?= /^(?:$(_gl_TS_extern)) +.*?(\w+) *\(/
+
+# If your project uses a macro like "XTERN", then put
+# the following in cfg.mk to override this default:
+# export _gl_TS_extern = extern|XTERN
+_gl_TS_extern ?= extern
+
+# The second nm|grep checks for file-scope variables with 'extern' scope.
+# Without gnulib's progname module, you might put program_name here.
+# Symbols matching '__.*' are reserved by the compiler,
+# so are automatically excluded below.
+_gl_TS_unmarked_extern_vars ?=
+
+# NOTE: the _match variables are perl expressions -- not mere regular
+# expressions -- so that you can extend them to match other patterns
+# and easily extract matched variable names.
+# For example, if your project declares some global variables via
+# a macro like this: GLOBAL(type, var_name, initializer), then you
+# can override this definition to automatically extract those names:
+# export _gl_TS_var_match = \
+#   /^(?:$(_gl_TS_extern)) .*?\**(\w+)(\[.*?\])?;/ || /\bGLOBAL\(.*?,\s*(.*?),/
+_gl_TS_var_match ?= /^(?:$(_gl_TS_extern)) .*?(\w+)(\[.*?\])?;/
+
+# The names of object files in (or relative to) $(_gl_TS_dir).
+_gl_TS_obj_files ?= *.$(OBJEXT)
+
+# Files in which to search for the one-line style extern declarations.
+# $(_gl_TS_dir)-relative.
+_gl_TS_headers ?= $(noinst_HEADERS)
+_gl_TS_other_headers ?= *.h
+
+.PHONY: _gl_tight_scope
+_gl_tight_scope: $(bin_PROGRAMS)
+	sed_wrap='s/^/^_?/;s/$$/$$/';					\
+	t=exceptions-$$$$;						\
+	trap 's=$$?; rm -f $$t; exit $$s' 0;				\
+	for sig in 1 2 3 13 15; do					\
+	  eval "trap 'v=`expr $$sig + 128`; (exit $$v); exit $$v' $$sig"; \
+	done;								\
+	src=`for f in $(SOURCES); do					\
+	       test -f $$f && d= || d=$(srcdir)/; echo $$d$$f; done`;	\
+	hdr=`for f in $(_gl_TS_headers); do				\
+	       test -f $$f && d= || d=$(srcdir)/; echo $$d$$f; done`;	\
+	( printf '%s\n' '__.*' $(_gl_TS_unmarked_extern_functions);	\
+	  $(GREP) -h -A1 '^extern .*[^;]$$' $$src			\
+	    | $(GREP) -vE '^(extern |--|#)' | $(SED) 's/ .*//; /^$$/d';	\
+	  perl -lne							\
+	     '$(_gl_TS_function_match) and print $$1' $$hdr;		\
+	) | sort -u | $(SED) "$$sed_wrap" > $$t;			\
+	nm -g $(_gl_TS_obj_files)|$(SED) -n 's/.* T //p'|$(GREP) -Ev -f $$t \
+	  && { echo the above functions should have static scope >&2;	\
+	       exit 1; } || : ;						\
+	( printf '%s\n' '__.*' main $(_gl_TS_unmarked_extern_vars);	\
+	  perl -lne '$(_gl_TS_var_match) and print $$1'			\
+		$$hdr $(_gl_TS_other_headers)				\
+	) | sort -u | $(SED) "$$sed_wrap" > $$t;			\
+	nm -g $(_gl_TS_obj_files) | $(SED) -n 's/.* [BCDGRS] //p'	\
+            | sort -u | $(GREP) -Ev -f $$t				\
+	  && { echo the above variables should have static scope >&2;	\
+	       exit 1; } || :
+# TS-end
+endif
diff --git a/src/grep/po/LINGUAS b/src/grep/po/LINGUAS
new file mode 100644
index 0000000..66177cf
--- /dev/null
+++ b/src/grep/po/LINGUAS
@@ -0,0 +1,43 @@
+af
+be
+bg
+ca
+cs
+da
+de
+el
+eo
+es
+et
+eu
+fi
+fr
+ga
+gl
+he
+hr
+hu
+id
+it
+ja
+ko
+ky
+lt
+nb
+nl
+pa
+pl
+pt
+pt_BR
+ro
+ru
+sk
+sl
+sr
+sv
+th
+tr
+uk
+vi
+zh_CN
+zh_TW
diff --git a/src/grep/po/Makefile.in.in b/src/grep/po/Makefile.in.in
new file mode 100644
index 0000000..fce63a6
--- /dev/null
+++ b/src/grep/po/Makefile.in.in
@@ -0,0 +1,453 @@
+# Makefile for PO directory in any package using GNU gettext.
+# Copyright (C) 1995-1997, 2000-2007, 2009-2010 by Ulrich Drepper <drepper@gnu.ai.mit.edu>
+#
+# This file can be copied and used freely without restrictions.  It can
+# be used in projects which are not available under the GNU General Public
+# License but which still want to provide support for the GNU gettext
+# functionality.
+# Please note that the actual code of GNU gettext is covered by the GNU
+# General Public License and is *not* in the public domain.
+#
+# Origin: gettext-0.18.2
+GETTEXT_MACRO_VERSION = 0.18
+
+PACKAGE = @PACKAGE@
+VERSION = @VERSION@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+
+SHELL = /bin/sh
+@SET_MAKE@
+
+srcdir = @srcdir@
+top_srcdir = @top_srcdir@
+VPATH = @srcdir@
+
+prefix = @prefix@
+exec_prefix = @exec_prefix@
+datarootdir = @datarootdir@
+datadir = @datadir@
+localedir = @localedir@
+gettextsrcdir = $(datadir)/gettext/po
+
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+
+# We use $(mkdir_p).
+# In automake <= 1.9.x, $(mkdir_p) is defined either as "mkdir -p --" or as
+# "$(mkinstalldirs)" or as "$(install_sh) -d". For these automake versions,
+# @install_sh@ does not start with $(SHELL), so we add it.
+# In automake >= 1.10, @mkdir_p@ is derived from ${MKDIR_P}, which is defined
+# either as "/path/to/mkdir -p" or ".../install-sh -c -d". For these automake
+# versions, $(mkinstalldirs) and $(install_sh) are unused.
+mkinstalldirs = $(SHELL) @install_sh@ -d
+install_sh = $(SHELL) @install_sh@
+MKDIR_P = @MKDIR_P@
+mkdir_p = @mkdir_p@
+
+GMSGFMT_ = @GMSGFMT@
+GMSGFMT_no = @GMSGFMT@
+GMSGFMT_yes = @GMSGFMT_015@
+GMSGFMT = $(GMSGFMT_$(USE_MSGCTXT))
+MSGFMT_ = @MSGFMT@
+MSGFMT_no = @MSGFMT@
+MSGFMT_yes = @MSGFMT_015@
+MSGFMT = $(MSGFMT_$(USE_MSGCTXT))
+XGETTEXT_ = @XGETTEXT@
+XGETTEXT_no = @XGETTEXT@
+XGETTEXT_yes = @XGETTEXT_015@
+XGETTEXT = $(XGETTEXT_$(USE_MSGCTXT))
+MSGMERGE = msgmerge
+MSGMERGE_UPDATE = @MSGMERGE@ --update
+MSGINIT = msginit
+MSGCONV = msgconv
+MSGFILTER = msgfilter
+
+POFILES = @POFILES@
+GMOFILES = @GMOFILES@
+UPDATEPOFILES = @UPDATEPOFILES@
+DUMMYPOFILES = @DUMMYPOFILES@
+DISTFILES.common = Makefile.in.in remove-potcdate.sin \
+$(DISTFILES.common.extra1) $(DISTFILES.common.extra2) $(DISTFILES.common.extra3)
+DISTFILES = $(DISTFILES.common) Makevars POTFILES.in \
+$(POFILES) $(GMOFILES) \
+$(DISTFILES.extra1) $(DISTFILES.extra2) $(DISTFILES.extra3)
+
+POTFILES = \
+
+CATALOGS = @CATALOGS@
+
+# Makevars gets inserted here. (Don't remove this line!)
+
+.SUFFIXES:
+.SUFFIXES: .po .gmo .mo .sed .sin .nop .po-create .po-update
+
+.po.mo:
+	@echo "$(MSGFMT) -c -o $@ $<"; \
+	$(MSGFMT) -c -o t-$@ $< && mv t-$@ $@
+
+.po.gmo:
+	@lang=`echo $* | sed -e 's,.*/,,'`; \
+	test "$(srcdir)" = . && cdcmd="" || cdcmd="cd $(srcdir) && "; \
+	echo "$${cdcmd}rm -f $${lang}.gmo && $(GMSGFMT) -c --statistics --verbose -o $${lang}.gmo $${lang}.po"; \
+	cd $(srcdir) && rm -f $${lang}.gmo && $(GMSGFMT) -c --statistics --verbose -o t-$${lang}.gmo $${lang}.po && mv t-$${lang}.gmo $${lang}.gmo
+
+.sin.sed:
+	sed -e '/^#/d' $< > t-$@
+	mv t-$@ $@
+
+
+all: all-@USE_NLS@
+
+all-yes: stamp-po
+all-no:
+
+# Ensure that the gettext macros and this Makefile.in.in are in sync.
+CHECK_MACRO_VERSION = \
+	test "$(GETTEXT_MACRO_VERSION)" = "@GETTEXT_MACRO_VERSION@" \
+	  || { echo "*** error: gettext infrastructure mismatch: using a Makefile.in.in from gettext version $(GETTEXT_MACRO_VERSION) but the autoconf macros are from gettext version @GETTEXT_MACRO_VERSION@" 1>&2; \
+	       exit 1; \
+	     }
+
+# $(srcdir)/$(DOMAIN).pot is only created when needed. When xgettext finds no
+# internationalized messages, no $(srcdir)/$(DOMAIN).pot is created (because
+# we don't want to bother translators with empty POT files). We assume that
+# LINGUAS is empty in this case, i.e. $(POFILES) and $(GMOFILES) are empty.
+# In this case, stamp-po is a nop (i.e. a phony target).
+
+# stamp-po is a timestamp denoting the last time at which the CATALOGS have
+# been loosely updated. Its purpose is that when a developer or translator
+# checks out the package via CVS, and the $(DOMAIN).pot file is not in CVS,
+# "make" will update the $(DOMAIN).pot and the $(CATALOGS), but subsequent
+# invocations of "make" will do nothing. This timestamp would not be necessary
+# if updating the $(CATALOGS) would always touch them; however, the rule for
+# $(POFILES) has been designed to not touch files that don't need to be
+# changed.
+stamp-po: $(srcdir)/$(DOMAIN).pot
+	@$(CHECK_MACRO_VERSION)
+	test ! -f $(srcdir)/$(DOMAIN).pot || \
+	  test -z "$(GMOFILES)" || $(MAKE) $(GMOFILES)
+	@test ! -f $(srcdir)/$(DOMAIN).pot || { \
+	  echo "touch stamp-po" && \
+	  echo timestamp > stamp-poT && \
+	  mv stamp-poT stamp-po; \
+	}
+
+# Note: Target 'all' must not depend on target '$(DOMAIN).pot-update',
+# otherwise packages like GCC can not be built if only parts of the source
+# have been downloaded.
+
+# This target rebuilds $(DOMAIN).pot; it is an expensive operation.
+# Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
+$(DOMAIN).pot-update: $(POTFILES) $(srcdir)/POTFILES.in remove-potcdate.sed
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU @PACKAGE@' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU @PACKAGE@' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
+	  package_gnu='GNU '; \
+	else \
+	  package_gnu=''; \
+	fi; \
+	if test -n '$(MSGID_BUGS_ADDRESS)' || test '$(PACKAGE_BUGREPORT)' = '@'PACKAGE_BUGREPORT'@'; then \
+	  msgid_bugs_address='$(MSGID_BUGS_ADDRESS)'; \
+	else \
+	  msgid_bugs_address='$(PACKAGE_BUGREPORT)'; \
+	fi; \
+	case `$(XGETTEXT) --version | sed 1q | sed -e 's,^[^0-9]*,,'` in \
+	  '' | 0.[0-9] | 0.[0-9].* | 0.1[0-5] | 0.1[0-5].* | 0.16 | 0.16.[0-1]*) \
+	    $(XGETTEXT) --default-domain=$(DOMAIN) --directory=$(top_srcdir) \
+	      --add-comments=TRANSLATORS: $(XGETTEXT_OPTIONS) @XGETTEXT_EXTRA_OPTIONS@ \
+	      --files-from=$(srcdir)/POTFILES.in \
+	      --copyright-holder='$(COPYRIGHT_HOLDER)' \
+	      --msgid-bugs-address="$$msgid_bugs_address" \
+	    ;; \
+	  *) \
+	    $(XGETTEXT) --default-domain=$(DOMAIN) --directory=$(top_srcdir) \
+	      --add-comments=TRANSLATORS: $(XGETTEXT_OPTIONS) @XGETTEXT_EXTRA_OPTIONS@ \
+	      --files-from=$(srcdir)/POTFILES.in \
+	      --copyright-holder='$(COPYRIGHT_HOLDER)' \
+	      --package-name="$${package_gnu}@PACKAGE@" \
+	      --package-version='@VERSION@' \
+	      --msgid-bugs-address="$$msgid_bugs_address" \
+	    ;; \
+	esac
+	test ! -f $(DOMAIN).po || { \
+	  if test -f $(srcdir)/$(DOMAIN).pot; then \
+	    sed -f remove-potcdate.sed < $(srcdir)/$(DOMAIN).pot > $(DOMAIN).1po && \
+	    sed -f remove-potcdate.sed < $(DOMAIN).po > $(DOMAIN).2po && \
+	    if cmp $(DOMAIN).1po $(DOMAIN).2po >/dev/null 2>&1; then \
+	      rm -f $(DOMAIN).1po $(DOMAIN).2po $(DOMAIN).po; \
+	    else \
+	      rm -f $(DOMAIN).1po $(DOMAIN).2po $(srcdir)/$(DOMAIN).pot && \
+	      mv $(DOMAIN).po $(srcdir)/$(DOMAIN).pot; \
+	    fi; \
+	  else \
+	    mv $(DOMAIN).po $(srcdir)/$(DOMAIN).pot; \
+	  fi; \
+	}
+
+# This rule has no dependencies: we don't need to update $(DOMAIN).pot at
+# every "make" invocation, only create it when it is missing.
+# Only "make $(DOMAIN).pot-update" or "make dist" will force an update.
+$(srcdir)/$(DOMAIN).pot:
+	$(MAKE) $(DOMAIN).pot-update
+
+# This target rebuilds a PO file if $(DOMAIN).pot has changed.
+# Note that a PO file is not touched if it doesn't need to be changed.
+$(POFILES): $(srcdir)/$(DOMAIN).pot
+	@lang=`echo $@ | sed -e 's,.*/,,' -e 's/\.po$$//'`; \
+	if test -f "$(srcdir)/$${lang}.po"; then \
+	  test "$(srcdir)" = . && cdcmd="" || cdcmd="cd $(srcdir) && "; \
+	  echo "$${cdcmd}$(MSGMERGE_UPDATE) $(MSGMERGE_OPTIONS) --lang=$${lang} $${lang}.po $(DOMAIN).pot"; \
+	  cd $(srcdir) \
+	    && { case `$(MSGMERGE_UPDATE) --version | sed 1q | sed -e 's,^[^0-9]*,,'` in \
+	           '' | 0.[0-9] | 0.[0-9].* | 0.1[0-7] | 0.1[0-7].*) \
+	             $(MSGMERGE_UPDATE) $(MSGMERGE_OPTIONS) $${lang}.po $(DOMAIN).pot;; \
+	           *) \
+	             $(MSGMERGE_UPDATE) $(MSGMERGE_OPTIONS) --lang=$${lang} $${lang}.po $(DOMAIN).pot;; \
+	         esac; \
+	       }; \
+	else \
+	  $(MAKE) $${lang}.po-create; \
+	fi
+
+
+install: install-exec install-data
+install-exec:
+install-data: install-data-@USE_NLS@
+	if test "$(PACKAGE)" = "gettext-tools"; then \
+	  $(mkdir_p) $(DESTDIR)$(gettextsrcdir); \
+	  for file in $(DISTFILES.common) Makevars.template; do \
+	    $(INSTALL_DATA) $(srcdir)/$$file \
+			    $(DESTDIR)$(gettextsrcdir)/$$file; \
+	  done; \
+	  for file in Makevars; do \
+	    rm -f $(DESTDIR)$(gettextsrcdir)/$$file; \
+	  done; \
+	else \
+	  : ; \
+	fi
+install-data-no: all
+install-data-yes: all
+	@catalogs='$(CATALOGS)'; \
+	for cat in $$catalogs; do \
+	  cat=`basename $$cat`; \
+	  lang=`echo $$cat | sed -e 's/\.gmo$$//'`; \
+	  dir=$(localedir)/$$lang/LC_MESSAGES; \
+	  $(mkdir_p) $(DESTDIR)$$dir; \
+	  if test -r $$cat; then realcat=$$cat; else realcat=$(srcdir)/$$cat; fi; \
+	  $(INSTALL_DATA) $$realcat $(DESTDIR)$$dir/$(DOMAIN).mo; \
+	  echo "installing $$realcat as $(DESTDIR)$$dir/$(DOMAIN).mo"; \
+	  for lc in '' $(EXTRA_LOCALE_CATEGORIES); do \
+	    if test -n "$$lc"; then \
+	      if (cd $(DESTDIR)$(localedir)/$$lang && LC_ALL=C ls -l -d $$lc 2>/dev/null) | grep ' -> ' >/dev/null; then \
+	        link=`cd $(DESTDIR)$(localedir)/$$lang && LC_ALL=C ls -l -d $$lc | sed -e 's/^.* -> //'`; \
+	        mv $(DESTDIR)$(localedir)/$$lang/$$lc $(DESTDIR)$(localedir)/$$lang/$$lc.old; \
+	        mkdir $(DESTDIR)$(localedir)/$$lang/$$lc; \
+	        (cd $(DESTDIR)$(localedir)/$$lang/$$lc.old && \
+	         for file in *; do \
+	           if test -f $$file; then \
+	             ln -s ../$$link/$$file $(DESTDIR)$(localedir)/$$lang/$$lc/$$file; \
+	           fi; \
+	         done); \
+	        rm -f $(DESTDIR)$(localedir)/$$lang/$$lc.old; \
+	      else \
+	        if test -d $(DESTDIR)$(localedir)/$$lang/$$lc; then \
+	          :; \
+	        else \
+	          rm -f $(DESTDIR)$(localedir)/$$lang/$$lc; \
+	          mkdir $(DESTDIR)$(localedir)/$$lang/$$lc; \
+	        fi; \
+	      fi; \
+	      rm -f $(DESTDIR)$(localedir)/$$lang/$$lc/$(DOMAIN).mo; \
+	      ln -s ../LC_MESSAGES/$(DOMAIN).mo $(DESTDIR)$(localedir)/$$lang/$$lc/$(DOMAIN).mo 2>/dev/null || \
+	      ln $(DESTDIR)$(localedir)/$$lang/LC_MESSAGES/$(DOMAIN).mo $(DESTDIR)$(localedir)/$$lang/$$lc/$(DOMAIN).mo 2>/dev/null || \
+	      cp -p $(DESTDIR)$(localedir)/$$lang/LC_MESSAGES/$(DOMAIN).mo $(DESTDIR)$(localedir)/$$lang/$$lc/$(DOMAIN).mo; \
+	      echo "installing $$realcat link as $(DESTDIR)$(localedir)/$$lang/$$lc/$(DOMAIN).mo"; \
+	    fi; \
+	  done; \
+	done
+
+install-strip: install
+
+installdirs: installdirs-exec installdirs-data
+installdirs-exec:
+installdirs-data: installdirs-data-@USE_NLS@
+	if test "$(PACKAGE)" = "gettext-tools"; then \
+	  $(mkdir_p) $(DESTDIR)$(gettextsrcdir); \
+	else \
+	  : ; \
+	fi
+installdirs-data-no:
+installdirs-data-yes:
+	@catalogs='$(CATALOGS)'; \
+	for cat in $$catalogs; do \
+	  cat=`basename $$cat`; \
+	  lang=`echo $$cat | sed -e 's/\.gmo$$//'`; \
+	  dir=$(localedir)/$$lang/LC_MESSAGES; \
+	  $(mkdir_p) $(DESTDIR)$$dir; \
+	  for lc in '' $(EXTRA_LOCALE_CATEGORIES); do \
+	    if test -n "$$lc"; then \
+	      if (cd $(DESTDIR)$(localedir)/$$lang && LC_ALL=C ls -l -d $$lc 2>/dev/null) | grep ' -> ' >/dev/null; then \
+	        link=`cd $(DESTDIR)$(localedir)/$$lang && LC_ALL=C ls -l -d $$lc | sed -e 's/^.* -> //'`; \
+	        mv $(DESTDIR)$(localedir)/$$lang/$$lc $(DESTDIR)$(localedir)/$$lang/$$lc.old; \
+	        mkdir $(DESTDIR)$(localedir)/$$lang/$$lc; \
+	        (cd $(DESTDIR)$(localedir)/$$lang/$$lc.old && \
+	         for file in *; do \
+	           if test -f $$file; then \
+	             ln -s ../$$link/$$file $(DESTDIR)$(localedir)/$$lang/$$lc/$$file; \
+	           fi; \
+	         done); \
+	        rm -f $(DESTDIR)$(localedir)/$$lang/$$lc.old; \
+	      else \
+	        if test -d $(DESTDIR)$(localedir)/$$lang/$$lc; then \
+	          :; \
+	        else \
+	          rm -f $(DESTDIR)$(localedir)/$$lang/$$lc; \
+	          mkdir $(DESTDIR)$(localedir)/$$lang/$$lc; \
+	        fi; \
+	      fi; \
+	    fi; \
+	  done; \
+	done
+
+# Define this as empty until I found a useful application.
+installcheck:
+
+uninstall: uninstall-exec uninstall-data
+uninstall-exec:
+uninstall-data: uninstall-data-@USE_NLS@
+	if test "$(PACKAGE)" = "gettext-tools"; then \
+	  for file in $(DISTFILES.common) Makevars.template; do \
+	    rm -f $(DESTDIR)$(gettextsrcdir)/$$file; \
+	  done; \
+	else \
+	  : ; \
+	fi
+uninstall-data-no:
+uninstall-data-yes:
+	catalogs='$(CATALOGS)'; \
+	for cat in $$catalogs; do \
+	  cat=`basename $$cat`; \
+	  lang=`echo $$cat | sed -e 's/\.gmo$$//'`; \
+	  for lc in LC_MESSAGES $(EXTRA_LOCALE_CATEGORIES); do \
+	    rm -f $(DESTDIR)$(localedir)/$$lang/$$lc/$(DOMAIN).mo; \
+	  done; \
+	done
+
+check: all
+
+info dvi ps pdf html tags TAGS ctags CTAGS ID:
+
+mostlyclean:
+	rm -f remove-potcdate.sed
+	rm -f stamp-poT
+	rm -f core core.* $(DOMAIN).po $(DOMAIN).1po $(DOMAIN).2po *.new.po
+	rm -fr *.o
+
+clean: mostlyclean
+
+distclean: clean
+	rm -f Makefile Makefile.in POTFILES *.mo
+
+maintainer-clean: distclean
+	@echo "This command is intended for maintainers to use;"
+	@echo "it deletes files that may require special tools to rebuild."
+	rm -f stamp-po $(GMOFILES)
+
+distdir = $(top_builddir)/$(PACKAGE)-$(VERSION)/$(subdir)
+dist distdir:
+	$(MAKE) update-po
+	@$(MAKE) dist2
+# This is a separate target because 'update-po' must be executed before.
+dist2: stamp-po $(DISTFILES)
+	dists="$(DISTFILES)"; \
+	if test "$(PACKAGE)" = "gettext-tools"; then \
+	  dists="$$dists Makevars.template"; \
+	fi; \
+	if test -f $(srcdir)/$(DOMAIN).pot; then \
+	  dists="$$dists $(DOMAIN).pot stamp-po"; \
+	fi; \
+	if test -f $(srcdir)/ChangeLog; then \
+	  dists="$$dists ChangeLog"; \
+	fi; \
+	for i in 0 1 2 3 4 5 6 7 8 9; do \
+	  if test -f $(srcdir)/ChangeLog.$$i; then \
+	    dists="$$dists ChangeLog.$$i"; \
+	  fi; \
+	done; \
+	if test -f $(srcdir)/LINGUAS; then dists="$$dists LINGUAS"; fi; \
+	for file in $$dists; do \
+	  if test -f $$file; then \
+	    cp -p $$file $(distdir) || exit 1; \
+	  else \
+	    cp -p $(srcdir)/$$file $(distdir) || exit 1; \
+	  fi; \
+	done
+
+update-po: Makefile
+	$(MAKE) $(DOMAIN).pot-update
+	test -z "$(UPDATEPOFILES)" || $(MAKE) $(UPDATEPOFILES)
+	$(MAKE) update-gmo
+
+# General rule for creating PO files.
+
+.nop.po-create:
+	@lang=`echo $@ | sed -e 's/\.po-create$$//'`; \
+	echo "File $$lang.po does not exist. If you are a translator, you can create it through 'msginit'." 1>&2; \
+	exit 1
+
+# General rule for updating PO files.
+
+.nop.po-update:
+	@lang=`echo $@ | sed -e 's/\.po-update$$//'`; \
+	if test "$(PACKAGE)" = "gettext-tools"; then PATH=`pwd`/../src:$$PATH; fi; \
+	tmpdir=`pwd`; \
+	echo "$$lang:"; \
+	test "$(srcdir)" = . && cdcmd="" || cdcmd="cd $(srcdir) && "; \
+	echo "$${cdcmd}$(MSGMERGE) $(MSGMERGE_OPTIONS) --lang=$$lang $$lang.po $(DOMAIN).pot -o $$lang.new.po"; \
+	cd $(srcdir); \
+	if { case `$(MSGMERGE) --version | sed 1q | sed -e 's,^[^0-9]*,,'` in \
+	       '' | 0.[0-9] | 0.[0-9].* | 0.1[0-7] | 0.1[0-7].*) \
+	         $(MSGMERGE) $(MSGMERGE_OPTIONS) -o $$tmpdir/$$lang.new.po $$lang.po $(DOMAIN).pot;; \
+	       *) \
+	         $(MSGMERGE) $(MSGMERGE_OPTIONS) --lang=$$lang -o $$tmpdir/$$lang.new.po $$lang.po $(DOMAIN).pot;; \
+	     esac; \
+	   }; then \
+	  if cmp $$lang.po $$tmpdir/$$lang.new.po >/dev/null 2>&1; then \
+	    rm -f $$tmpdir/$$lang.new.po; \
+	  else \
+	    if mv -f $$tmpdir/$$lang.new.po $$lang.po; then \
+	      :; \
+	    else \
+	      echo "msgmerge for $$lang.po failed: cannot move $$tmpdir/$$lang.new.po to $$lang.po" 1>&2; \
+	      exit 1; \
+	    fi; \
+	  fi; \
+	else \
+	  echo "msgmerge for $$lang.po failed!" 1>&2; \
+	  rm -f $$tmpdir/$$lang.new.po; \
+	fi
+
+$(DUMMYPOFILES):
+
+update-gmo: Makefile $(GMOFILES)
+	@:
+
+# Recreate Makefile by invoking config.status. Explicitly invoke the shell,
+# because execution permission bits may not work on the current file system.
+# Use @SHELL@, which is the shell determined by autoconf for the use by its
+# scripts, not $(SHELL) which is hardwired to /bin/sh and may be deficient.
+Makefile: Makefile.in.in Makevars $(top_builddir)/config.status @POMAKEFILEDEPS@
+	cd $(top_builddir) \
+	  && @SHELL@ ./config.status $(subdir)/$@.in po-directories
+
+force:
+
+# Tell versions [3.59,3.63) of GNU make not to export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/grep/po/Makevars b/src/grep/po/Makevars
new file mode 100644
index 0000000..b81d9f1
--- /dev/null
+++ b/src/grep/po/Makevars
@@ -0,0 +1,67 @@
+# Makefile variables for PO directory in any package using GNU gettext.
+
+# Usually the message domain is the same as the package name.
+DOMAIN = $(PACKAGE)
+
+# These two variables depend on the location of this directory.
+subdir = po
+top_builddir = ..
+
+# These options get passed to xgettext.
+XGETTEXT_OPTIONS = --keyword=_ --keyword=N_ \
+          \
+ --flag=_:1:pass-c-format\
+ --flag=N_:1:pass-c-format\
+ --flag=error:3:c-format --flag=error_at_line:5:c-format\
+\
+ --flag=asnprintf:3:c-format\
+ --flag=asprintf:2:c-format\
+ --flag=error:3:c-format\
+ --flag=error_at_line:5:c-format\
+ --flag=vasnprintf:3:c-format\
+ --flag=vasprintf:2:c-format\
+ --flag=wrapf:1:c-format\
+ --from-code=UTF-8\
+ $${end_of_xgettext_options+}
+
+# This is the copyright holder that gets inserted into the header of the
+# $(DOMAIN).pot file.  Set this to the copyright holder of the surrounding
+# package.  (Note that the msgstr strings, extracted from the package's
+# sources, belong to the copyright holder of the package.)  Translators are
+# expected to transfer the copyright for their translations to this person
+# or entity, or to disclaim their copyright.  The empty string stands for
+# the public domain; in this case the translators are expected to disclaim
+# their copyright.
+COPYRIGHT_HOLDER = Free Software Foundation, Inc.
+
+# This is the email address or URL to which the translators shall report
+# bugs in the untranslated strings:
+# - Strings which are not entire sentences, see the maintainer guidelines
+#   in the GNU gettext documentation, section 'Preparing Strings'.
+# - Strings which use unclear terms or require additional context to be
+#   understood.
+# - Strings which make invalid assumptions about notation of date, time or
+#   money.
+# - Pluralisation problems.
+# - Incorrect English spelling.
+# - Incorrect formatting.
+# It can be your email address, or a mailing list address where translators
+# can write to without being subscribed, or the URL of a web page through
+# which the translators can contact you.
+MSGID_BUGS_ADDRESS = bug-grep@gnu.org
+
+# This is the list of locale categories, beyond LC_MESSAGES, for which the
+# message catalogs shall be used.  It is usually empty.
+EXTRA_LOCALE_CATEGORIES = 
+
+# This tells whether the $(DOMAIN).pot file contains messages with an 'msgctxt'
+# context.  Possible values are "yes" and "no".  Set this to yes if the
+# package uses functions taking also a message context, like pgettext(), or
+# if in $(XGETTEXT_OPTIONS) you define keywords with a context argument.
+USE_MSGCTXT = no
+
+# These options get passed to msgmerge.
+# Useful options are in particular:
+#   --previous            to keep previous msgids of translated messages,
+#   --quiet               to reduce the verbosity.
+MSGMERGE_OPTIONS =
diff --git a/src/grep/po/POTFILES.in b/src/grep/po/POTFILES.in
new file mode 100644
index 0000000..4d41ff9
--- /dev/null
+++ b/src/grep/po/POTFILES.in
@@ -0,0 +1,33 @@
+# List of files which containing translatable strings.
+#
+# Copyright 1997-1998, 2005-2021 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+lib/argmatch.c
+lib/argmatch.h
+lib/c-stack.c
+lib/closeout.c
+lib/dfa.c
+lib/error.c
+lib/getopt.c
+lib/obstack.c
+lib/openat-die.c
+lib/xbinary-io.c
+lib/quotearg.c
+lib/regcomp.c
+lib/version-etc.c
+lib/xalloc-die.c
+src/grep.c
+src/pcresearch.c
diff --git a/src/grep/po/Rules-quot b/src/grep/po/Rules-quot
new file mode 100644
index 0000000..d2ac20d
--- /dev/null
+++ b/src/grep/po/Rules-quot
@@ -0,0 +1,47 @@
+# Special Makefile rules for English message catalogs with quotation marks.
+
+DISTFILES.common.extra1 = quot.sed boldquot.sed en@quot.header en@boldquot.header insert-header.sin Rules-quot
+
+.SUFFIXES: .insert-header .po-update-en
+
+en@quot.po-create:
+	$(MAKE) en@quot.po-update
+en@boldquot.po-create:
+	$(MAKE) en@boldquot.po-update
+
+en@quot.po-update: en@quot.po-update-en
+en@boldquot.po-update: en@boldquot.po-update-en
+
+.insert-header.po-update-en:
+	@lang=`echo $@ | sed -e 's/\.po-update-en$$//'`; \
+	if test "$(PACKAGE)" = "gettext-tools"; then PATH=`pwd`/../src:$$PATH; GETTEXTLIBDIR=`cd $(top_srcdir)/src && pwd`; export GETTEXTLIBDIR; fi; \
+	tmpdir=`pwd`; \
+	echo "$$lang:"; \
+	ll=`echo $$lang | sed -e 's/@.*//'`; \
+	LC_ALL=C; export LC_ALL; \
+	cd $(srcdir); \
+	if $(MSGINIT) -i $(DOMAIN).pot --no-translator -l $$lang -o - 2>/dev/null | sed -f $$tmpdir/$$lang.insert-header | $(MSGCONV) -t UTF-8 | $(MSGFILTER) sed -f `echo $$lang | sed -e 's/.*@//'`.sed 2>/dev/null > $$tmpdir/$$lang.new.po; then \
+	  if cmp $$lang.po $$tmpdir/$$lang.new.po >/dev/null 2>&1; then \
+	    rm -f $$tmpdir/$$lang.new.po; \
+	  else \
+	    if mv -f $$tmpdir/$$lang.new.po $$lang.po; then \
+	      :; \
+	    else \
+	      echo "creation of $$lang.po failed: cannot move $$tmpdir/$$lang.new.po to $$lang.po" 1>&2; \
+	      exit 1; \
+	    fi; \
+	  fi; \
+	else \
+	  echo "creation of $$lang.po failed!" 1>&2; \
+	  rm -f $$tmpdir/$$lang.new.po; \
+	fi
+
+en@quot.insert-header: insert-header.sin
+	sed -e '/^#/d' -e 's/HEADER/en@quot.header/g' $(srcdir)/insert-header.sin > en@quot.insert-header
+
+en@boldquot.insert-header: insert-header.sin
+	sed -e '/^#/d' -e 's/HEADER/en@boldquot.header/g' $(srcdir)/insert-header.sin > en@boldquot.insert-header
+
+mostlyclean: mostlyclean-quot
+mostlyclean-quot:
+	rm -f *.insert-header
diff --git a/src/grep/po/af.gmo b/src/grep/po/af.gmo
new file mode 100644
index 0000000..4bcb8cc
--- /dev/null
+++ b/src/grep/po/af.gmo
diff --git a/src/grep/po/af.po b/src/grep/po/af.po
new file mode 100644
index 0000000..5fef5f9
--- /dev/null
+++ b/src/grep/po/af.po
@@ -0,0 +1,847 @@
+# grep
+# Copyright (C) 2004 Free Software Foundation, Inc.
+# Petri Jooste <rkwjpj@puk.ac.za>, 2004.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 2.5g\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2004-03-03 13:33+0200\n"
+"Last-Translator: Petri Jooste <rkwjpj@puk.ac.za>\n"
+"Language-Team: Afrikaans <i18n@af.org.za>\n"
+"Language: af\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=iso-8859-1\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr ""
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr ""
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr ""
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr ""
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr ""
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr ""
+
+#: lib/dfa.c:896
+#, fuzzy
+msgid "unbalanced ["
+msgstr "Ongebalanseerde ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr ""
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr ""
+
+#: lib/dfa.c:1210
+#, fuzzy
+msgid "unfinished \\ escape"
+msgstr "Onbe�indigde \\-ontsnapstring"
+
+#: lib/dfa.c:1371
+#, fuzzy
+msgid "invalid content of \\{\\}"
+msgstr "ongeldige maks-telling"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr ""
+
+#: lib/dfa.c:1858
+#, fuzzy
+msgid "unbalanced ("
+msgstr "Ongebalanseerde ("
+
+#: lib/dfa.c:1975
+#, fuzzy
+msgid "no syntax specified"
+msgstr "Geen sintaks gespesifiseer"
+
+#: lib/dfa.c:1986
+#, fuzzy
+msgid "unbalanced )"
+msgstr "Ongebalanseerde )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Onbekende stelselfout"
+
+#: lib/getopt.c:278
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: opsie `%s' is dubbelsinnig\n"
+
+#: lib/getopt.c:284
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: opsie `%s' is dubbelsinnig\n"
+
+#  +option or -option
+#: lib/getopt.c:319
+#, fuzzy, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: onbekende opsie `%c%s'\n"
+
+#: lib/getopt.c:345
+#, fuzzy, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: opsie `%c%s' laat nie 'n parameter toe nie\n"
+
+#: lib/getopt.c:360
+#, fuzzy, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: opsie `%s' benodig 'n parameter\n"
+
+#: lib/getopt.c:621
+#, fuzzy, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: ongeldige opsie -- %c\n"
+
+#  1003.2 specifies the format of this message.
+#: lib/getopt.c:636 lib/getopt.c:682
+#, fuzzy, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: opsie benodig 'n parameter -- %c\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "geheue uitgeput"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr ""
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr ""
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr ""
+
+#  Get translations for open and closing quotation marks.
+#  The message catalog should translate "`" to a left
+#  quotation mark suitable for the locale, and similarly for
+#  "'".  If the catalog has no translation,
+#  locale_quoting_style quotes `like this', and
+#  clocale_quoting_style quotes "like this".
+#  For example, an American English Unicode locale should
+#  translate "`" to U+201C (LEFT DOUBLE QUOTATION MARK), and
+#  should translate "'" to U+201D (RIGHT DOUBLE QUOTATION
+#  MARK).  A British English Unicode locale should instead
+#  translate these to U+2018 (LEFT SINGLE QUOTATION MARK) and
+#  U+2019 (RIGHT SINGLE QUOTATION MARK), respectively.
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "'"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "'"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr ""
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr ""
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr ""
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr ""
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr ""
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr ""
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr ""
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr ""
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr ""
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr ""
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr ""
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr ""
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Geheue uitgeput"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr ""
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr ""
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr ""
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ""
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr ""
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr ""
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr ""
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr ""
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr ""
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr ""
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr ""
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(standaardtoevoer)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "ongeldige konteks-lengte-parameter"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "toevoer is te veel om te tel"
+
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "Bin�re l�er %s pas\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "rekursiewe lus van gidsinskrywings"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr ""
+
+#: src/grep.c:1961 src/grep.c:1968
+#, fuzzy, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Gebruik so: %s [OPSIE]... PATROON [L�ER]...\n"
+
+#: src/grep.c:1963
+#, fuzzy, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Probeer `%s --help' vir meer inligting.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr ""
+
+#: src/grep.c:1970
+#, fuzzy, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Soek vir PATROON in elke L�ER of in standaardtoevoer.\n"
+"Voorbeeld: %s -i 'hello world' menu.h main.c\n"
+"\n"
+"Re�lmatige uitdrukking-seleksie en -interpretasie:\n"
+
+#: src/grep.c:1975
+#, fuzzy, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     PATROON is 'n uitgebreide re�lmatige "
+"uitdrukking\n"
+"  -F, --fixed-strings       PATROON is 'n reeks stringe geskei met "
+"nuwere�lkarakters\n"
+"  -G, --basic-regexp        PATROON is 'n basic regular expression\n"
+"  -P, --perl-regexp         PATROON is 'n  Perl regular expression\n"
+
+#: src/grep.c:1981
+#, fuzzy, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=PATROON      gebruik PATROON as 'n re�lmatige uitdrukking\n"
+"  -f, --file=FILE           verkry PATROON vanaf L�ER\n"
+"  -i, --ignore-case         ignoreer kasverskille\n"
+"  -w, --word-regexp         dwing PATROON om slegs op hele woorde te pas\n"
+"  -x, --line-regexp         dwing PATROON om slegs op hele re�ls te pas\n"
+"  -z, --null-data           elke datare�l eindig met 'n 0-greep, nie 'n "
+"nuwere�lkarakter nie\n"
+
+#: src/grep.c:1989
+#, fuzzy, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Verskeie:\n"
+"  -s, --no-messages         onderdruk foutboodskappe\n"
+"  -v, --invert-match        soek nie-passende re�ls\n"
+"  -V, --version             wys weergaweinligting en stop\n"
+"      --help                wys hierdie hulpboodskap en stop\n"
+"      --mmap                gebruik geheue-gebonde toevoer indien moontlik\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"\n"
+"Konteksbeheer:\n"
+"  -B, --before-context=AANTAL wys AANTAL re�ls voorafgaande konteks\n"
+"  -A, --after-context=AANTAL  wys AANTAL re�ls daaropvolgende konteks\n"
+"  -C, --context=AANTAL        wys AANTAL re�ls afvoerkonteks\n"
+"  -AANTAL                     dieselfde as --context=AANTAL\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       gebruik merkers om die passende string uit te "
+"wys\n"
+"                            WHEN kan wees: `always', `never' of `auto'.\n"
+"  -U, --binary              moenie CR-karakters by re�leindes wegvat nie "
+"(MSDOS)\n"
+"  -u, --unix-byte-offsets   wys uitwyking asof die CR nie daar is nie "
+"(MSDOS)\n"
+"\n"
+"`egrep' beteken `grep -E'.  `fgrep' beteken `grep -F'.\n"
+"Met geen L�ER, of wanneer L�ER 'n - is, lees standaardtoevoer.  \n"
+"Indien minder as twee L�ERs gegee is, aanvaar -h. Uittreestatus is\n"
+" 0 vir passing, 1 vir geen passing, en 2 vir probleemgevalle.\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "teenstrydige passers is gespesifiseer"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+
+#: src/grep.c:2103
+#, fuzzy, c-format
+msgid "invalid matcher %s"
+msgstr "ongeldige maks-telling"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "onbekende metode vir toestelle"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "ongeldige maks-telling"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "onbekende bin�re-l�ertipe"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr ""
+
+#: src/pcresearch.c:143
+#, fuzzy
+msgid "the -P option only supports a single pattern"
+msgstr "Die -P opsie word nie ondersteun nie"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr ""
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr ""
+
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "geheue uitgeput"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr ""
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr ""
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr ""
+
+#, fuzzy, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "waarskuwing: %s: %s\n"
+
+#, fuzzy
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: opsie `--%s' laat nie 'n parameter toe nie\n"
+
+#  --option
+#, fuzzy
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: onbekende opsie `--%s'\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: opsie `-W %s' is dubbelsinnig\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: opsie `-W %s' laat nie 'n parameter toe nie\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: opsie `%s' benodig 'n parameter\n"
+
+#  Cases:
+#  {M} - exact count
+#  {M,} - minimum count, maximum is infinity
+#  {M,N} - M through N
+#~ msgid "unfinished repeat count"
+#~ msgstr "onbe�indigde herhaaltelling"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "wangevormde herhaaltelling"
+
+#~ msgid "out of memory"
+#~ msgstr "te min geheue"
+
+#~ msgid "writing output"
+#~ msgstr "afvoer word geskryf"
+
+#~ msgid "Usage: %s [OPTION]... PATTERN [FILE] ...\n"
+#~ msgstr "Gebruik so: %s [OPSIE]... PATROON [L�ER] ...\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE\n"
+#~ "                            TYPE is 'binary', 'text', or 'without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories\n"
+#~ "                            ACTION is 'read', 'recurse', or 'skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets\n"
+#~ "                            ACTION is 'read' or 'skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=PATTERN     files that match PATTERN will be examined\n"
+#~ "      --exclude=PATTERN     files that match PATTERN will be skipped.\n"
+#~ "      --exclude-from=FILE   files that match PATTERN in FILE will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match only print FILE names containing no match\n"
+#~ "  -l, --files-with-matches  only print FILE names containing matches\n"
+#~ "  -c, --count               only print a count of matching lines per "
+#~ "FILE\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Afvoerbeheer:\n"
+#~ "  -m, --max-count=AANTAL    stop na AANTAL passings\n"
+#~ "  -b, --byte-offset         wys die greep-uitwyking saam met elke "
+#~ "afvoerre�l\n"
+#~ "  -n, --line-number         wys die re�lnommer saam met elke afvoerre�l\n"
+#~ "      --line-buffered       maak elke keer die lynbuffer leeg\n"
+#~ "  -H, --with-filename       wys die l�ernaam vir elke passing\n"
+#~ "  -h, --no-filename         onderdruk die vooraf-l�ernaam in die afvoer\n"
+#~ "      --label=ETIKET        wys ETIKET as l�ernaam vir standaardtoevoer\n"
+#~ "  -o, --only-matching       wys slegs die deel van 'n re�l wat pas op die "
+#~ "PATROON\n"
+#~ "  -q, --quiet, --silent     onderdruk alle normale afvoer\n"
+#~ "      --binary-files=TIPE   aanvaar dat bin�re l�ers van hierdie TIPE "
+#~ "is.\n"
+#~ "                            TIPE kan wees: 'binary', 'text', of 'without-"
+#~ "match'\n"
+#~ "  -a, --text                dieselfde as --binary-files=text\n"
+#~ "  -I                        dieselfde as --binary-files=without-match\n"
+#~ "  -d, --directories=AKSIE   hoe om gidse te hanteer\n"
+#~ "                            AKSIE kan wees: 'read', 'recurse', of 'skip'\n"
+#~ "  -D, --devices=AKSIE       hoe om toestelle te hanteer, FIFOs en sokke\n"
+#~ "                            AKSIE kan wees: 'read' of 'skip'\n"
+#~ "  -R, -r, --recursive       dieselfde as --directories=recurse\n"
+#~ "      --include=PATROON     l�ers waarop PATROON pas sal ondersoek word.\n"
+#~ "      --exclude=PATROON     l�ers waarop PATROON pas sal sal oorgeslaan "
+#~ "word.\n"
+#~ "      --exclude-from=FILE   l�ers waarop PATROON in L�ER pas sal "
+#~ "oorgeslaan word.\n"
+#~ "  -L, --files-without-match wys slegs l�ername wat geen passing bevat "
+#~ "nie\n"
+#~ "  -l, --files-with-matches  wys slegs l�ername wat wel passing(s) bevat\n"
+#~ "  -c, --count               wys slegs die aantal re�ls in elke L�ER wat "
+#~ "passings bevat\n"
+#~ "  -Z, --null                wys die 0-greep na die L�ERnaam\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Report bugs to <bug-gnu-utils@gnu.org>.\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Rapporteer foute aan <bug-gnu-utils@gnu.org>.\n"
+
+#~ msgid "unknown directories method"
+#~ msgstr "onbekende metode vir gidse"
+
+#~ msgid "%s (GNU grep) %s\n"
+#~ msgstr "%s (GNU grep) %s\n"
+
+#~ msgid ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+#~ msgstr ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions. There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "Hierdie is vry programmatuur; kyk in die bronkode vir "
+#~ "kopie�rvoorwaardes.  Daar is GEEN\n"
+#~ "waarborg nie; selfs nie vir VERKOOPBAARHEID of GESKIKTHEID VIR 'N "
+#~ "SPESIFIEKE DOEL nie.\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "Die -P en -z opsies kan nie gekombineer word nie"
+
+#  1003.2 specifies the format of this message.
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: ongeldige opsie -- %c\n"
diff --git a/src/grep/po/be.gmo b/src/grep/po/be.gmo
new file mode 100644
index 0000000..b7605ba
--- /dev/null
+++ b/src/grep/po/be.gmo
diff --git a/src/grep/po/be.po b/src/grep/po/be.po
new file mode 100644
index 0000000..eca874b
--- /dev/null
+++ b/src/grep/po/be.po
@@ -0,0 +1,834 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
+# Ales Nyakhaychyk <nab@mail.by>, 2001-2003.
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 2.5g\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2003-07-22 17:18+0300\n"
+"Last-Translator: Ales Nyakhaychyk <nab@mail.by>\n"
+"Language-Team: Belarusian <i18n@mova.org>\n"
+"Language: be\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"X-Generator: KBabel 0.9.6\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr ""
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr ""
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr ""
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr ""
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr ""
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr ""
+
+#: lib/dfa.c:896
+#, fuzzy
+msgid "unbalanced ["
+msgstr "Неўраўнаважаная ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr ""
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr ""
+
+#: lib/dfa.c:1210
+#, fuzzy
+msgid "unfinished \\ escape"
+msgstr "Незавершаная \\ кіруючая пасьлядоўнасьць"
+
+#: lib/dfa.c:1371
+#, fuzzy
+msgid "invalid content of \\{\\}"
+msgstr "недапушчальны найбольшы лічыльнік"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr ""
+
+#: lib/dfa.c:1858
+#, fuzzy
+msgid "unbalanced ("
+msgstr "Неўраважаная ("
+
+#: lib/dfa.c:1975
+#, fuzzy
+msgid "no syntax specified"
+msgstr "Сынтаксіс нявызначаны"
+
+#: lib/dfa.c:1986
+#, fuzzy
+msgid "unbalanced )"
+msgstr "Неўраўнаважаная )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Невядомая сыстэмная памылка"
+
+#: lib/getopt.c:278
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: выбар \"%s\" неадназначны\n"
+
+#: lib/getopt.c:284
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: выбар \"%s\" неадназначны\n"
+
+#: lib/getopt.c:319
+#, fuzzy, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: нераспазнаны выбар \"%c%s\n"
+
+#: lib/getopt.c:345
+#, fuzzy, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: выбар \"%c%s\" не дазваляе довад\n"
+
+#: lib/getopt.c:360
+#, fuzzy, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: выбар \"%s\" патрабуе довад\n"
+
+#: lib/getopt.c:621
+#, fuzzy, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: нерэчаісны выбар -- %c\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, fuzzy, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: выбар патрабуе довад -- %c\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "памяць вычарпана"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr ""
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr ""
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr ""
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "\""
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "\""
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr ""
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr ""
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr ""
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr ""
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr ""
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr ""
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr ""
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr ""
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr ""
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr ""
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr ""
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr ""
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Памяць вычарпана"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr ""
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr ""
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr ""
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ""
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr ""
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr ""
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr ""
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr ""
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr ""
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr ""
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr ""
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(стандартны ўвод)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "недапушчальны довад даўжыні кантэксту"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "увод занадта вялікі для падліку"
+
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "Супадзеньні двайковага файла %s\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "тэчкі зацыклены"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr ""
+
+#: src/grep.c:1961 src/grep.c:1968
+#, fuzzy, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Выкарыстаньне: %s [ВЫБАР]... УЗОР [ФАЙЛ]...\n"
+
+#: src/grep.c:1963
+#, fuzzy, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Паспрабуйце \"%s --help\" для больш падрабязных зьвестак.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr ""
+
+#: src/grep.c:1970
+#, fuzzy, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"    Шукае ўзор у файле ці ў стандартным уводзе.\n"
+"Напрыклад: %s -i 'hello world' menu.h main.c\n"
+"\n"
+"Выбар і тлумачэньне выразаў:\n"
+
+#: src/grep.c:1975
+#, fuzzy, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     УЗОР - гэта пашыраны сталы выраз.\n"
+"  -F, --fixed-strings       УЗОР - гэта набор радкоў, падзеленых між сабой\n"
+"                            пераходамі на новы радок.\n"
+"  -G, --basic-regexp        УЗОР - гэта асноўны сталы выраз.\n"
+"  -P, --perl-regexp         УЗОР - гэта сталы выраз на Perl.\n"
+
+#: src/grep.c:1981
+#, fuzzy, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=УЗОР         Выкарыстоваць УЗОР як сталы выраз.\n"
+"  -f, --file=ФАЙЛ           Атрымліваць узор з файла.\n"
+"  -i, --ignore-case         Не зьвяртаць увагу на розьніцу між вялікімі й\n"
+"                            маленькімі літарамі.\n"
+"  -w, --word-regexp         Прымушае каб узор цалкам адпавядаў слову.\n"
+"  -x, --line-regexp         Прымушае каб узор цалкам адпавядаў радку.\n"
+"  -z, --null-data           Радок даньняў павінен мець канчатак ў выглядзе\n"
+"                            нулявога байта, замест знака новага радка.\n"
+
+#: src/grep.c:1989
+#, fuzzy, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Разнастайныя:\n"
+"  -s, --no-messages         Падаўляць паведамленьні пра памылкі.\n"
+"  -v, --invert-match        Выбіраць нясупаўшыя радкі.\n"
+"  -V, --version             Надрукаваць зьвесткі пра вэрсыю й выйсьці.\n"
+"      --help                Адлюстраваць гэтую даведку й выйсьці.\n"
+"      --mmap                Выкарыстоўваць memory-mapped, калі гэта "
+"магчыма.\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"\n"
+"Кіраваньне падтэкстам:\n"
+"  -B, --before-context=N    Друкаваць N радкоў папярэдняга падтэксту.\n"
+"  -A, --after-context=N     Друкаваць N радкоў наступнага падтэксту.\n"
+"  -C, --context=N           Друкаваць N радкоў падтэксту.\n"
+"  -N                        Раўназначна --context=N\n"
+"      --color[=КАЛІ],\n"
+"      --colour[=КАЛІ]       Выкарыстоўваць пазначальнікі, каб адрозьніваць\n"
+"                            супаўшыя радкі. КАЛІ можа быць: \"always\"\n"
+"                            (заўсёды), \"never\" (ніколі)  ці \"auto\".\n"
+"  -U, --binary              Не абразаць знакі CR на прыканцы радка (MSDOS).\n"
+"  -u, --unix-byte-offsets   Паведамляць пра адлегласьці такім чынам, нібыта\n"
+"                            знакі CR адсутнічаюць наагул (MSDOS).\n"
+"\n"
+"\"egrep\" азначае \"grep -E\".  \"fgrep\" азначае \"grep -F\".\n"
+"Бяз ФАЙЛа, ці калі замест назвы ФАЙЛа працяжнік -, чытае стандартны ўвод.\n"
+"Калі заданы менш чым два файла, працуе як у выпадку выбара -h.  Стан выхаду\n"
+"роўны 0, калі ё супадзеньні, 1, калі супадзеньняў няма й 2 у выпадку "
+"памылкі.\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "заданы супярэчлівыя супадальнікі"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+
+#: src/grep.c:2103
+#, fuzzy, c-format
+msgid "invalid matcher %s"
+msgstr "недапушчальны найбольшы лічыльнік"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "невядомы мэтад пралад"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "недапушчальны найбольшы лічыльнік"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "невядомы від дваічнага файла"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr ""
+
+#: src/pcresearch.c:143
+#, fuzzy
+msgid "the -P option only supports a single pattern"
+msgstr "Выбар -P непадтрымліваецца"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr ""
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr ""
+
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "памяць вычарпана"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr ""
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr ""
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr ""
+
+#, fuzzy, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "Увага! %s: %s\n"
+
+#, fuzzy
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: выбар \"--%s\" не дазваляе довад\n"
+
+#, fuzzy
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: нераспазнаны выбар \"--%s\"\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: выбар \"-W %s\" неадназначны\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: выбар \"-W %s\" не дазваляе довады\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: выбар \"%s\" патрабуе довад\n"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "незавершаная колькасьць паўтарэньняў"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "дрэнная колькасьць паўтарэньняў"
+
+#~ msgid "out of memory"
+#~ msgstr "нехапае памяці"
+
+#~ msgid "writing output"
+#~ msgstr "запісваецца вывад"
+
+#~ msgid "Usage: %s [OPTION]... PATTERN [FILE] ...\n"
+#~ msgstr "Выкарыстаньне: %s [ВЫБАР]... УЗОР [ФАЙЛ] ...\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE\n"
+#~ "                            TYPE is 'binary', 'text', or 'without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories\n"
+#~ "                            ACTION is 'read', 'recurse', or 'skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets\n"
+#~ "                            ACTION is 'read' or 'skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=PATTERN     files that match PATTERN will be examined\n"
+#~ "      --exclude=PATTERN     files that match PATTERN will be skipped.\n"
+#~ "      --exclude-from=FILE   files that match PATTERN in FILE will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match only print FILE names containing no match\n"
+#~ "  -l, --files-with-matches  only print FILE names containing matches\n"
+#~ "  -c, --count               only print a count of matching lines per "
+#~ "FILE\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Кіраваньне вывадам:\n"
+#~ "  -m, --max-count=N         Спыніцца пасьля N супадзеньняў.\n"
+#~ "  -b, --byte-offset         Друкаваць адлегласьць байта разам з вывадам "
+#~ "радкоў.\n"
+#~ "  -n, --line-number         Друкаваць нумары радкоў побач з радкамі.\n"
+#~ "      --line-buffered       Скідаць вывад на кожным радку.\n"
+#~ "  -H, --with-filename       Друкаваць назву файла на кожнае супадзеньне.\n"
+#~ "  -h, --no-filename         Падаўляць назвы файлаў у вывадзе.\n"
+#~ "      --label=МЕТКА         Друкаваць метку ў якасьці назвы файла для\n"
+#~ "                            стандартнага ўвода.\n"
+#~ "  -o, --only-matching       Паказываць толькі тую частку радка, якая\n"
+#~ "                            супадае з узорам.\n"
+#~ "  -q, --quiet, --silent     Падаўляць увесь звычайны вывад.\n"
+#~ "      --binary-files=ВІД    Задаць від двайковага файла. Наяўныя віды:\n"
+#~ "                            \"binary\" (двайковы), \"text\" (тэкставы) "
+#~ "ці\n"
+#~ "                            \"without-match\" (неістотны).\n"
+#~ "  -a, --text                Раўназначна --binary-files=text.\n"
+#~ "  -I                        Раўназначна --binary-files=without-match.\n"
+#~ "  -d, --directories=ДЗЕЯНЬНЕ\n"
+#~ "                            Як апрацоўваць тэчкі; ДЗЕЯНЬНЕ можа быць "
+#~ "\"read\"\n"
+#~ "                            (чытаць), \"recurse\" (рэкурсыўна абходзіць) "
+#~ "ці\n"
+#~ "                            \"skip\" (абмінаць).\n"
+#~ "  -D, --devices=ДЗЕЯНЬНЕ    Як апрацоўваць прылады, FIFO й гнёзды;\n"
+#~ "                            ДЗЕЯНЬНЕ можа быць \"read\" (чытаць) ці\n"
+#~ "                            \"skip\" (абмінаць).\n"
+#~ "  -R, -r, --recursive       Раўназначна --directories=recurse.\n"
+#~ "      --include=УЗОР        Апрацоўваць файлы, які адпавядаюць узору.\n"
+#~ "      --exclude=УЗОР        Не апрацоўваць файлы, які адпавядаюць узору.\n"
+#~ "      --exclude-from=ФАЙЛ   Абмінаць файлы, якія адпавядаюць узору з "
+#~ "файла.\n"
+#~ "  -L, --files-without-match Друкаваць толькі назвы тых файлаў, што ня\n"
+#~ "                            ўтрымліваюць супадзеньні.\n"
+#~ "  -l, --files-with-matches  Друкаваць толькі назвы тых файлаў, што "
+#~ "ўтрымліваюць\n"
+#~ "                            супадзеньні.\n"
+#~ "  -c, --count               Друкаваць толькі колькасьць супаўшых радкоў "
+#~ "на файл.\n"
+#~ "  -Z, --null                Друкаваць 0-ы байт пасьля назвы файла.\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Report bugs to <bug-gnu-utils@gnu.org>.\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Паведамляйце пра памылкі на <bug-gnu-utils@gnu.org>.\n"
+
+#~ msgid "unknown directories method"
+#~ msgstr "невядомы мэтад тэчак"
+
+#~ msgid "%s (GNU grep) %s\n"
+#~ msgstr "%s (GNU grep) %s\n"
+
+#~ msgid ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+#~ msgstr ""
+#~ "    Аўтарскія правы © 1988, 1992-2001 Free Software Foundation, Inc.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions. There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "    Гэта вольнае праграмнае забесьпячэньне.  Глядзіце зыходны тэкст для\n"
+#~ "пагадненьня аб распаўсюджваньні.  Не йснуе НІЯКАЕ гарантыі, нават аб\n"
+#~ "магчымасьці выкарыстаньня зь якой-небудзь мэтай.\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "Выбары -P і -z ня могуць ісьці разам"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: недапушчальны выбар -- %c\n"
diff --git a/src/grep/po/bg.gmo b/src/grep/po/bg.gmo
new file mode 100644
index 0000000..ffc2c53
--- /dev/null
+++ b/src/grep/po/bg.gmo
diff --git a/src/grep/po/bg.po b/src/grep/po/bg.po
new file mode 100644
index 0000000..7020c58
--- /dev/null
+++ b/src/grep/po/bg.po
@@ -0,0 +1,769 @@
+# Bulgarian translation of GNU grep po-file.
+# Copyright (C) 2002, 2015, 2016, 2017, 2018, 2019, 2020, 2021 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Pavel Mihaylov <avatarbg@bulgaria.com>, 2002.
+# Alexander Shopov <ash@kambanaria.org>, 2015, 2016, 2017, 2018, 2019, 2020, 2021.
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 3.6.27\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-08-09 16:17+0300\n"
+"Last-Translator: Alexander Shopov <ash@kambanaria.org>\n"
+"Language-Team: Bulgarian <dict@ludost.net>\n"
+"Language: bg\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=utf-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "аргументът „%s“ на опцията „%s“ е неправилен"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "аргументът „%s“ на опцията „%s“ не е еднозначен"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Възможните аргументи са:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "програмна грешка"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "препълване на стека"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "грешка при запис"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "„[“ без еш"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "неправилен клас знаци"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "клас знаци се указва чрез „[[:ИМЕ:]]“, а не „[:ИМЕ:]“"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "незавършена екранираща последователност чрез „\\“"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "неправилно съдържание в „\\{\\}“"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "прекалено голям регулярен израз"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "„(“ без еш"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "не е зададен синтаксис"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "„)“ без еш"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Неизвестна системна грешка"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: опцията „%s%s“ не е еднозначна\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: опцията „%s%s“ не е еднозначна. Възможности:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: непозната опция „%s%s“\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: опцията „%s%s“ се използва без аргументи\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: опцията „%s%s“ изисква аргумент\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: неправилна опция — „%c“\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: опцията изисква аргумент — „%c“\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "паметта е изчерпана"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "не може да се запише коя е текущата работна директория"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "не може да се върне към първоначалната работна директория"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "неуспешно задаване на вид на файла като текстов/двоичен"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "„"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "“"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Успех"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Няма съвпадения"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Неправилен регулярен израз"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Неправилен знак за подредба"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Неправилно име на клас знаци"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Самотна „\\“ накрая"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Неправилна препратка към съвпадение"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "„[“, „[^“, „[:“, „[.“ или „[=“ без еш"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "„(“ или „\\(“ без еш"
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "„\\{“ без еш"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Неправилно съдържание в „\\{\\}“"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Неправилен край на диапазон"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Паметта свърши"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Предхождащият регулярен израз е неправилен"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Ранен край на регулярен израз"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Регулярният израз е прекалено голям"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "„)“ или „\\)“ без еш"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Няма предхождащ регулярен израз"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Пакетирано от %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Пакетирано от %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Лиценз — Общ публичен лиценз на GNU (GNU GPL), както е публикуван от "
+"Фондацията\n"
+"за свободен софтуер — версия 3 на лиценза или (по ваше решение) по-късна "
+"версия.\n"
+"<%s>\n"
+"Тази програма е свободен софтуер. Можете да я разпространявате и/или "
+"променяте.\n"
+"Тя се разпространява БЕЗ НИКАКВИ ГАРАНЦИИ доколкото е позволено от закона.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Създадено от %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Създадено от %s и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Създадено от %s, %s и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Създадено от %s, %s, %s\n"
+"и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Създадено от %s, %s, %s,\n"
+"%s и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Създадено от %s, %s, %s,\n"
+"%s, %s и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Създадено от %s, %s, %s,\n"
+"%s, %s, %s и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Създадено от %s, %s, %s,\n"
+"%s, %s, %s, %s\n"
+"и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Създадено от %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Създадено от %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s и др.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"Докладвайте грешки в програмата на адрес: %s\n"
+"Докладвайте грешки в превода на адрес: <dict@ludost.net>\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Докладвайте грешки в „%s“ на адрес: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Уеб страница на „%s“: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Обща помощ за програмите на GNU: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(стандартен вход)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "неправилен размер на контекста"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "входните данни са прекалено големи, за да бъдат преброени"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "„%s“: двоичният файл напасва"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "„%s“: зацикляне при рекурсивна обработка на директориите"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "„%s“: входният файл е и изходен"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Употреба: %s [ОПЦИЯ]… ШАБЛОН… [ФАЙЛ]…\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "За повече информация изпълнете „%s --help“.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Търсене на текст, напасващ с ШАБЛОНите във всеки зададен ФАЙЛ.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Пример: %s -i 'hello world' menu.h main.c\n"
+"Може да използвате по един ШАБЛОН на ред.\n"
+"\n"
+"Избор на шаблона и интерпретация:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     ШАБЛОНите са разширени регулярни изрази\n"
+"  -F, --fixed-regexp        ШАБЛОНите са дословни низове\n"
+"  -G, --basic-regexp        ШАБЛОНите са основни регулярни изрази "
+"(стандартно)\n"
+"  -P, --perl-regexp         ШАБЛОНите са регулярни изрази на Perl\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=ШАБЛОН       ШАБЛОН за регулярен израз\n"
+"  -f, --file=ФАЙЛ           изчитане на ШАБЛОНите от ФАЙЛ\n"
+"  -i, --ignore-case         без разлика между главни и малки букви\n"
+"      --no-ignore-case      със разлика между главни и малки букви "
+"(стандартно)\n"
+"  -w, --word-regexp         съвпадане само с цели думи\n"
+"  -x, --line-regexp         съвпадане само с цели редове\n"
+"  -z, --null-data           редовете завършват с NULL, а не със знак за нов "
+"ред\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Разни:\n"
+"  -s, --no-messages         без съобщения за грешки\n"
+"  -v, --revert-match        извеждане на несъвпадащите редове\n"
+"  -V, --version             извеждане на информация за версията и изход\n"
+"      --help                извеждане на помощна информация и изход\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Управление на резултата:\n"
+"  -m, --max-count=БРОЙ      спиране след този БРОЙ избрани редове\n"
+"  -b, --byte-offset         извеждане на отместването в байтове за всеки "
+"ред\n"
+"  -n, --line-number         извеждане на номерата на редовете\n"
+"      --line-buffered       буфериране по редове\n"
+"  -H, --with-filename       извеждане на името на файла при всяко "
+"съвпадение\n"
+"  -h, --no-filename         без извеждане на името на файла за всяко "
+"съвпадение\n"
+"      --label=ЕТИКЕТ        използване на ЕТИКЕТ като име за стандартния "
+"вход\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       извеждане само на съвпадението, а не целия ред\n"
+"  -q, --quiet, --silent     нищо не се извежда, само се задава изходен код\n"
+"      --binary-files=ВИД    двоичните файлове да се третират като такъв ВИД\n"
+"                            ВИДът може да „binary“ (двоичен), "
+"„text“ (текстов),\n"
+"                            или „without-match“ (без съвпадение).\n"
+"  -a, --text                същото като „--binary-files=text“\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        същото като „--binary-files=without-match“\n"
+"  -d, --directories=ДЕЙСТВИЕ\n"
+"                            ДЕЙСТВИЕ при директориите. То може да е:\n"
+"                            „read“ (изчитане), „recurse“ (рекурсивно "
+"търсене)\n"
+"                            или „skip“ (пропускане)\n"
+"  -D, --devices=ДЕЙСТВИЕ    ДЕЙСТВИЕ за специалните файлове, програмните "
+"канали\n"
+"                            и гнездата. То може да е „read“ (изчитане) или\n"
+"                            „skip“ (пропускане)\n"
+"  -R, -r, --recursive       същото като „--directories=recurse“\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=ШАБЛОН_ЗА_ИМЕ\n"
+"                            търсене само във файлове с имена, напасващи\n"
+"                            ШАБЛОНа_ЗА_ИМЕ\n"
+"      --exclude=ШАБЛОН_ЗА_ИМЕ\n"
+"                            пропускане на файлове с имена, напасващи\n"
+"                            ШАБЛОНа_ЗА_ИМЕ\n"
+"      --exclude-from=ФАЙЛ   пропускане на файлове с имена, напасващи на\n"
+"                            шаблоните в този ФАЙЛ\n"
+"      --exclude-dir=ШАБЛОН_ЗА_ИМЕ\n"
+"                            пропускане на директории с имена, напасващи\n"
+"                            ШАБЛОНа_ЗА_ИМЕ\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match извеждане само на имената на файлове без "
+"съвпадения\n"
+"  -l, --files-with-matches  извеждане само на имената на файлове със "
+"съвпадения\n"
+"  -c, --count               извеждане само на броя съвпадащи редове във "
+"файл\n"
+"  -T, --initial-tab         подравняване на табулациите при необходимост\n"
+"  -Z, --null                извеждане на знак NULL след всяко име на файл\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Контрол върху контекста:\n"
+"  -B, --before-context=БРОЙ извеждане на този БРОЙ предхождащи редове\n"
+"  -A, --after-context=БРОЙ  извеждане на този БРОЙ следващи редове\n"
+"  -C, --context=БРОЙ        извеждане на този БРОЙ предхождащи и следващи\n"
+"                            редове\n"
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -БРОЙ                     същото като --context=БРОЙ\n"
+"      --group-separator=РАЗД\n"
+"                            извеждане на този РАЗДелител на отделен ред "
+"между\n"
+"                            съвпаденията с контекст\n"
+"      --no-group-separator  без извеждане на този РАЗДелител между "
+"съвпаденията\n"
+"      --color[=КОГА]\n"
+"      --colour[=КОГА]       оцветяване на съвпадащите низове. КОГА е "
+"„always“\n"
+"                            (винаги), „never“ (никога) или "
+"„auto“ (автоматично)\n"
+"  -U, --binary              знаците „CR“ в края на реда да се запазват\n"
+"                            (DOS/Windows)\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Когато ФАЙЛът е „-“ се чете стандартният вход.  Без ФАЙЛ се чете текущата\n"
+"директория „.“.  Ако са зададени по-малко от два ФАЙЛа, се предполага „-h“.\n"
+"Изходният код на grep е 0 при поне един напаснат ред и 1 във всички "
+"останали\n"
+"случаи.  Ако не е зададена опцията „-q“ и възникне грешка, изходният код е "
+"2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "зададените изрази за съвпадение са в конфликт"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"Липсва поддръжка на шаблони по Perl — текущата команда е компилирана с\n"
+"опцията „--disable-perl-regexp“."
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "неправилен израз „%s“"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "неизвестен метод за обработка на специалните файлове"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr "ПРЕДУПРЕЖДЕНИЕ: опцията „--unix-byte-offsets“ („-u“) е остаряла"
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "неправилен максимален брой"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "непознат вид двоичен файл"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Създадено от Mike Haertel и др., вижте\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr ""
+"неуспешно заделяне на памет за стека за изпълнение на шаблоните за „PCRE“"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "опцията „-P“ изисква локалът да е с еднобайтово кодиране или UTF-8"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "опцията „-P“ поддържа само един шаблон"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "вътрешна грешка, която не трябва да възниква — молим да я докладвате"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "максималният размер на реда за „PCRE“ е превишен"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: паметта е изчерпана"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: паметта за стека за изпълнение на шаблоните за „PCRE“ свърши"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: максималният брой връщания при рекурсия на „PCRE“ е превишен"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: превишен е максимумът за рекурсия на „PCRE“"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: вътрешна грешка на „PCRE“: %d"
diff --git a/src/grep/po/boldquot.sed b/src/grep/po/boldquot.sed
new file mode 100644
index 0000000..4b937aa
--- /dev/null
+++ b/src/grep/po/boldquot.sed
@@ -0,0 +1,10 @@
+s/"\([^"]*\)"/“\1”/g
+s/`\([^`']*\)'/‘\1’/g
+s/ '\([^`']*\)' / ‘\1’ /g
+s/ '\([^`']*\)'$/ ‘\1’/g
+s/^'\([^`']*\)' /‘\1’ /g
+s/“”/""/g
+s/“/“/g
+s/”/”/g
+s/‘/‘/g
+s/’/’/g
diff --git a/src/grep/po/ca.gmo b/src/grep/po/ca.gmo
new file mode 100644
index 0000000..7f98c99
--- /dev/null
+++ b/src/grep/po/ca.gmo
diff --git a/src/grep/po/ca.po b/src/grep/po/ca.po
new file mode 100644
index 0000000..f803a72
--- /dev/null
+++ b/src/grep/po/ca.po
@@ -0,0 +1,879 @@
+# Traducció missatges de GNU grep al català.
+# Copyright (C) 2002 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Enric Alberola Rosell <enricalberola@wanadoo.es>, 2002, 2010.
+# Àngel Mompó <mecatxis@mecatxis.cat>, 2010, 2011, 2012, 2014, 2017, 2019.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: GNU grep-3.1.48\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2019-07-18 22:11+0200\n"
+"Last-Translator: Àngel Mompó <mecatxis@mecatxis.cat>\n"
+"Language-Team: Catalan <ca@dodds.net>\n"
+"Language: ca\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+"X-Generator: Gtranslator 2.91.7\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "l'argument %s no és vàlid per %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "l'argument %s és ambigu per %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Els arguments vàlids són:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "error del programa"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "desbordament de la pila"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "error d'escriptura"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "[ desaparellat"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "La classe de caràcter no és vàlida"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "La sintaxi de la classe de caràcter és [[:espai:]], no [:espai:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "Codi d'escapada \\ inacabat"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "el context de \\{\\} no és vàlid"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "l'expressió regular és massa gran"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "( desaparellat"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "no s'ha especificat cap sintaxi"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr ") desaparellat"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Error desconegut del sistema"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: l'opció «%s%s» és ambigua\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: l'opció «%s%s» és ambigua; possibilitats:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: no es reconeix l'opció «%s%s»\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: l'opció «%s%s» no permet un argument\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: l'opció «%s%s» necessita un argument\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: l'opció no és vàlida -- «%c»\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: l'opció necessita un argument -- «%c»\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "memòria exhaurida"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "no es pot enregistrar el directori de treball actual"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "no s'ha pogut tornar al directori de treball inicial"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "No s'ha pogut establir el mode del descriptor de fitxers text/binari"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "«"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "»"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Èxit"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "No coincideix"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "L'expressió regular no és vàlida"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "La compaginació del caràcter no és vàlida"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "El nom de la classe del caràcter no és vàlida"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Barra inversa final"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "La referència anterior no és vàlida"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Falten o sobren  [, [^, [:, [., o [="
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "falten o sobren ( o \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "Falten o sobren \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "El context de \\{\\} no és vàlid"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "L'abast no és vàlid"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Memòria exhaurida"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "L'expressió regular precedent no és vàlida"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Final prematur de l'expressió regular"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "L'expressió regular és massa gran"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "Falten o sobren ) o \\)"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "No hi ha una expressió regular prèvia"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Empaquetat per %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Empaquetat per %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "(C)"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, fuzzy, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"\n"
+"Llicència GPLv3+: GNU GPL versió 3 o posterior <http://gnu.org/licenses/gpl."
+"html>.\n"
+"Aquest programari és lliure: podeu modificar-lo i redistribuir-lo si voleu.\n"
+"No hi ha CAP GARANTIA, en la mesura que ho permeti la llei.\n"
+"\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Escrit per %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Escrit per %s i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Escrit per %s, %s i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Escrit per %s, %s, %s.\n"
+"i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Escrit per %s, %s, %s.\n"
+"%s, i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Escrit per %s, %s, %s.\n"
+"%s, %s, i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Escrit per %s, %s, %s.\n"
+"%s, %s, %s, i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Escrit per %s, %s, %s.\n"
+"%s, %s, %s, %s,\n"
+"i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Escrit per %s, %s, %s.\n"
+"%s, %s, %s, %s,\n"
+"%s, i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Escrit per %s, %s, %s.\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, i altres.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, fuzzy, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"\n"
+"Informeu dels errors a: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Informeu dels errors de %s a: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Pàgina inicial de %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, fuzzy, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr ""
+"Ajuda general d'utilització del programari de GNU: <https://www.gnu.org/"
+"gethelp/>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(entrada estàndard)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "la longitud de l'argument no és vàlida"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "l'entrada és massa llarga per a comptar"
+
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "Hi ha coincidències en el fitxer binari %s\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "bucle de directori recursiu"
+
+#: src/grep.c:1899
+#, fuzzy, c-format
+msgid "%s: input file is also the output"
+msgstr "el fitxer d'entrada %s és també la sortida"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Forma d'ús: %s [OPCIÓ]... PATRONS [FITXER] ...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Feu servir «%s --help» per a obtenir més informació.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Busca els PATRONS a cada FITXER.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Exemple: %s -i «hola món» menu.h main.c\n"
+"PATRONS pot contenir diversos patrons separats per salts de línia.\n"
+"\n"
+"Selecció i interpretació del patró:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     PATRONS són expressions regulars ampliades\n"
+"  -F, --fixed-strings       PATRONS són conjunts de cadenes separades per "
+"salts de línia\n"
+"  -G, --basic-regexp        PATRONS són expressions regulars bàsiques (per "
+"defecte)\n"
+"  -P, --perl-regexp         PATRONS són expressions regulars de Perl\n"
+
+#: src/grep.c:1981
+#, fuzzy, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=PATRONS      utilitza els PATRONS per la comparació\n"
+"  -f, --file=FITXER         obté els PATRONS del FITXER\n"
+"  -i, --ignore-case         no diferencia entre majúscules i minúscules\n"
+"  -w, --word-regexp         força la concordança amb paraules completes\n"
+"  -x, --line-regexp         força la concordança amb línies completes\n"
+"  -z, --null-data           una línia de dades acaba amb byte 0 i no amb un "
+"salt de línia\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Miscel·lània:\n"
+"  -s, --no-messages         suprimeix els missatges d'error\n"
+"  -v, --invert-match        selecciona les línies que no coincideixen\n"
+"  -V, --version             mostra la informació sobre la versió i surt\n"
+"      --help                mostra aquesta ajuda i surt\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Control de sortida:\n"
+"  -m, --max-count=NUM       s'atura després de NUM coincidències\n"
+"  -b, --byte-offset         mostra el byte de desplaçament amb les línies de "
+"sortida\n"
+"  -n, --line-number         mostra el número de lí­nia amb les línies de "
+"sortida\n"
+"      --line-buffered       bolca la sortida a cada línia\n"
+"  -H, --with-filename       mostra el nom del fitxer amb les línies de "
+"sortida\n"
+"  -h, --no-filename         elimina els noms dels fitxers de la sortida\n"
+"      --label=ETIQUETA      fes servir ETIQUETA com a prefix del nom del "
+"fitxer per l'entrada estàndard\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       mostra només la part de la línia que "
+"coincideixi\n"
+"  -q, --quiet, --silent     elimina la sortida normal\n"
+"      --binary-files=TIPUS  assumeix que els fitxers binaris són de tipus "
+"TIPUS;\n"
+"                            TIPUS pot ser «binary», «text» o «without-"
+"match»\n"
+"  -a, --text                equivalent a --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        equivalent a --binary-files=without-match\n"
+"  -d, --directories=ACCIÓ   com cal tractar els directoris;\n"
+"                            ACCIÓ pot ser: «read», «recurse», o «skip»\n"
+"  -D, --devices=ACCIÓ       com tractar els dispositius, FIFOs i sòcols;\n"
+"                            ACCIÓ pot ser: «read» o «skip»\n"
+"  -r, --recursive           equivalent a --directories=recurse\n"
+"  -R, --dereference-recursive  igual que l'anterior, però segueix tots els "
+"enllaços simbòlics\n"
+
+#: src/grep.c:2023
+#, fuzzy, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=GLOB........  busca els fitxers que coincideixin amb GLOB "
+"(un fitxer patró)\n"
+"      --exclude=GLOB ........ salta els fitxers i directoris que "
+"coincideixin amb GLOB\n"
+"      --exclude-from=FITXER   salta els fitxers que coincideixin amb "
+"qualsevol fitxer patró del FITXER\n"
+"      --exclude-dir=GLOB  ...salta els directoris que coincideixin amb "
+"GLOB.\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match  mostra només els noms dels FITXERs que no "
+"tinguin cap línia seleccionada\n"
+"  -l, --files-with-matches  mostra només els noms dels FITXERs que "
+"continguin alguna línia seleccionada\n"
+"  -c, --count               mostra només el nombre de línies selecionades "
+"per FITXER\n"
+"  -T, --initial-tab         alinea les tabulacions (si cal)\n"
+"  -Z, --null                mostra byte 0 després del nom de FITXER\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Control del context:\n"
+"  -B, --before-context=NOMBRE mostra un NOMBRE de línies del context "
+"anterior\n"
+"  -A, --after-context=NOMBRE  mostra un NOMBRE de línies del context "
+"posterior\n"
+"  -C, --context=NOMBRE        mostra un NOMBRE de línies del context de "
+"sortida\n"
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NUM                        el mateix que --context=NUM\n"
+"      --color[=QUAN],\n"
+"      --colour[=QUAN]         ressalta amb marcadors les cadenes "
+"coincidents;\n"
+"                              QUAN pot ser: «always», «never» o «auto»\n"
+"  -U, --binary                no elimina els caràcters CR als EOL (MSDOS/"
+"Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, fuzzy, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Quan el FITXER és «-», llegeix l'entrada estàndard. Si no s'indica el "
+"FITXER, llegeix «.» \n"
+"si és recursiu i «-» si no ho és. Si s'indiquen menys de dos FITXERs, "
+"assumeix -h.\n"
+"L'estat de sortida és 0 si s'havia seleccionat alguna línia (o algun fitxer "
+"si -L), si no 1.\n"
+"Si hi ha algun error i no s'ha indicat -q, l'estat de sortida és 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "s'han especificat expressions conflictives"
+
+#: src/grep.c:2101
+#, fuzzy
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"el suport per l'opció -P no està  compilat a aquest binari --disable-perl-"
+"regexp"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "l'expressió %s no és vàlida"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "el mètode de dispositius és desconegut"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "el comptador de màxims no és vàlid"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "el tipus de fitxer binari és desconegut"
+
+#: src/grep.c:2829
+#, fuzzy
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr "la resta, vegeu <https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>"
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "no s'ha pogut assignar memòria per la pila JIT del PCRE"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P només permet la configuració local en unibyte i en UTF-8"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "l'opció -P només suporta un sol patró"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "error intern (no hauria de passar mai)"
+
+# PCRE is 'Perl Compatible Regular Expression'
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "s'ha superat el límit de longitud de línia del PCRE"
+
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "memòria exhaurida"
+
+#: src/pcresearch.c:310
+#, fuzzy, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "S'ha acabat la pila del PCRE JIT"
+
+# PCRE is 'Perl Compatible Regular Expression'
+#: src/pcresearch.c:315
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "s'ha superat el límit de l'estratègia «tornada enrere» del PCRE"
+
+# PCRE is 'Perl Compatible Regular Expression'
+#: src/pcresearch.c:319
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "s'ha superat el límit de l'estratègia «tornada enrere» del PCRE"
+
+#: src/pcresearch.c:327
+#, fuzzy, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "error intern del PCRE: %d"
+
+#, c-format
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr "avís: GREP_OPTIONS està desfasat; feu servir un alies o un script"
+
+#, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "aví­s: %s: %s"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "l'argument «%s» de %s%s no és vàlid"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "el sufix «%s» de %s%s no és vàlid"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "l'argument «%s» de %s%s és massa gran"
+
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "Pàgina inicial de %s: <https://www.gnu.org/software/%s/>\n"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "internal error"
+#~ msgstr "error intern"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: l'opció «--%s» no permet un argument\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: l'opció és desconeguda «--%s»\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: l'opció «-W %s» és ambigua\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: l'opció «-W %s» no permet un argument\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: l'opció «-W %s» necessita un argument\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "l'lseek ha fallat"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "El PATRÓ és, per defecte, una expressió regular bàsica (ERB).\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "«egrep» ara és «grep -E». «fgrep» ara és «grep -F».\n"
+#~ "La crida directa tant de «egrep» com de «fgrep» és obsoleta.\n"
+
+#~ msgid "unescaped ^ or $ not supported with -Pz"
+#~ msgstr "falta el caràcter d'escapada de ^ o no es permet $ amb -Pz"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "Pàgina principal del Grep de GNU: <%s>\n"
+
+#~ msgid "invalid UTF-8 byte sequence in input"
+#~ msgstr "la seqüència d'entrada UTF-8 byte no és vàlida"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "El PATRÓ és una expressió regular ampliada (ERA).\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr "La crida com a «egrep» està desfasada; feu servir «grep -E».\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr ""
+#~ "El PATRÓ és un conjunt de cadenes fixes separades per salts de línia.\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr "La crida com a «fgrep» està desfasada; feu servir «grep -F».\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s només pot fer servir la sintaxis de patró %s"
+
+#~ msgid "the --mmap option has been a no-op since 2010"
+#~ msgstr "la opció --mmap no fa res des del 2010"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "comptador de repeticions inacabat"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "comptador de repeticions defectuós"
+
+#~ msgid "writing output"
+#~ msgstr "s'escriu a la sortida"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity needs a value (\"=...\"); "
+#~ "skipped"
+#~ msgstr ""
+#~ "a GREP_COLORS=\"%s\", la capacitat \"%s\" necessita un valor (\"=..\"). "
+#~ "S'ha omés"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity is boolean and cannot take a "
+#~ "value (\"=%s\"); skipped"
+#~ msgstr ""
+#~ "a GREP_COLORS=\"%s\", la capacitat \"%s\" és booleana i no pot tenir el "
+#~ "valor (\"=%s\"). S'ha omés"
+
+#~ msgid "in GREP_COLORS=\"%s\", the \"%s\" capacity %s"
+#~ msgstr "a GREP_COLORS=\"%s\", la capacitat \"%s\" %s"
+
+#~ msgid ""
+#~ "stopped processing of ill-formed GREP_COLORS=\"%s\" at remaining "
+#~ "substring \"%s\""
+#~ msgstr ""
+#~ "s'ha deixat de processar de les subcadenes GREP_COLORS=\"%s\" mal "
+#~ "formades \"%s\""
diff --git a/src/grep/po/cs.gmo b/src/grep/po/cs.gmo
new file mode 100644
index 0000000..d3795dd
--- /dev/null
+++ b/src/grep/po/cs.gmo
diff --git a/src/grep/po/cs.po b/src/grep/po/cs.po
new file mode 100644
index 0000000..29a24eb
--- /dev/null
+++ b/src/grep/po/cs.po
@@ -0,0 +1,989 @@
+# Czech message catalog for grep.
+# Copyright (C) 1998 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Vladimir Michl <Vladimir.Michl@seznam.cz>, 1998.
+# Petr Pisar <petr.pisar@atlas.cz>, 2008, 2009, 2010, 2011, 2012, 2013.
+# Petr Pisar <petr.pisar@atlas.cz>, 2014, 2015, 2016, 2018, 2020, 2021.
+#
+# Thanks to Stanislav Brabec <utx@k332.feld.cvut.cz>.
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 3.6.27\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-08-09 20:10+02:00\n"
+"Last-Translator: Petr Pisar <petr.pisar@atlas.cz>\n"
+"Language-Team: Czech <translation-team-cs@lists.sourceforge.net>\n"
+"Language: cs\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "neplatný argument %s u %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "nejednoznačný argument %s u %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Platné argumenty jsou:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "chyba programu"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "přetečení zásobníku"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "chyba při zápisu"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "nevyvážená ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "neplatný třída znaků"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "zápis třídy znaků je [[:space:]], ne [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "neukončená escape sekvence \\"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "neplatný obsah \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "regulární výraz je příliš velký"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "nevyvážená ("
+
+# ? Není zadaná syntaxe
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "syntaxe není určena"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "nevyvážená )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Neznámá systémová chyba"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: přepínač „%s%s“ není jednoznačný\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: přepínač „%s%s“ není jednoznačný: možnosti:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: nerozpoznaný přepínač „%s%s“\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: přepínač „%s%s“ musí být zadán bez argumentu\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: přepínač „%s%s“ vyžaduje argument\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: neznámý přepínač – „%c“\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: přepínač vyžaduje argument – „%c“\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "paměť vyčerpána"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "nelze zaznamenat aktuální pracovní adresář"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "návrat do prvotního pracovního adresáře se nezdařil"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "nastavení textového/binárního režimu deskriptoru souboru selhalo"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "„"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "“"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Úspěch"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Žádná shoda"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Neplatný regulární výraz"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Neplatný řadicí znak"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Neplatný název třídy znaků"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Závěrečné koncové lomítko"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Neplatný zpětný odkaz"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Nepárový [, [^, [:, [. nebo [="
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "Nepárový ( nebo \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "Nepárový \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Neplatný obsah \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Neplatný konec rozsahu"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Paměť vyčerpána"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Neplatný předchozí regulární výraz"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Předčasný konec regulárního výrazu"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Regulární výraz je příliš velký"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "Nepárový ) nebo \\)"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Žádný předchozí regulární výraz"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Zabaleno kým: %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Zabaleno kým: %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Licence GPLv3+: GNU GPL verze 3 nebo novější\n"
+"<%s>.\n"
+"Toto je volné programové vybavení: máte právo jej měnit a dále šířit.\n"
+"Není zde ŽÁDNÁ ZÁRUKA, jak jen zákon dovoluje.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Napsal(a) %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Napsali(y) %s a %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Napsali(y) %s, %s a %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Napsali(y) %s, %s, %s\n"
+"a %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Napsali(y) %s, %s, %s,\n"
+"%s a %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Napsali(y) %s, %s, %s,\n"
+"%s, %s a %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Napsali(y) %s, %s, %s,\n"
+"%s, %s, %s a %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Napsali(y) %s, %s, %s,\n"
+"%s, %s, %s, %s\n"
+"a %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Napsali(y) %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s a %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Napsali(y) %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s a další.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"Chyby v programu oznamujte (anglicky) na adresu: <%s>\n"
+"Připomínky k překladu na adresu: <translation-team-cs@lists.sourceforge."
+"net>\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Chyby distributora %s oznamujte (anglicky) na adresu: <%s>\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Domovská stránka programu %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Obecná pomoc s používáním GNU softwaru: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(standardní vstup)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "neplatný argument délky kontextu"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "počet vstupních řádků nelze spočítat (je jich hodně)"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: binární soubor odpovídá"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: pozor: smyčka rekurzivních adresářů"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: vstupní soubor je rovněž výstupem"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Použití: %s [PŘEPÍNAČ]… VZORKY [SOUBOR]…\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Více informací získáte příkazem „%s --help“.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Každý SOUBOR prohledá na VZORKY.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Příklad: %s -i 'hello world' menu.h main.c\n"
+"VZORKY smí obsahovat více vzorků oddělených novým řádkem.\n"
+"\n"
+"Výběr a interpretace vzorku:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     VZORKY jsou rozšířené regulární výrazy\n"
+"  -F, --fixed-strings       VZORKY jsou řetězce\n"
+"  -G, --basic-regexp        VZORKY jsou základní regulární výrazy\n"
+"  -P, --perl-regexp         VZORKY jsou regulární výrazy jazyka Perl\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=VZORKY       použije VZORKY jako regulární výraz\n"
+"  -f, --file=SOUBOR         načte VZORKY ze SOUBORU\n"
+"  -i, --ignore-case         ignoruje rozdíly ve velikosti písmen ve "
+"vzorcích\n"
+"                            a datech\n"
+"      --no-ignore-case      neignoruje rozdíly ve velikosti písmen "
+"(výchozí)\n"
+"  -w, --word-regexp         hledá pouze na celá slova\n"
+"  -x, --line-regexp         hledá pouze celé řádky\n"
+"  -z, --null-data           řádek končí nulovým bajtem místo znaku nového "
+"řádku\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Různé:\n"
+"  -s, --no-messages         potlačí chybové zprávy\n"
+"  -v, --invert-match        vybere neodpovídající řádky\n"
+"  -V, --version             vypíše označení verze a skončí\n"
+"      --help                vypíše tuto nápovědu a skončí\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Řízení výstupu:\n"
+"  -m, --max-count=POČET     skončí po vybrání POČTU řádků\n"
+"  -b, --byte-offset         s každým výstupním řádkem vypíše jeho pozici\n"
+"                            v souboru\n"
+"  -n, --line-number         s každým výstupním řádkem vypíše jeho číslo "
+"řádku\n"
+"      --line-buffered       vyprázdní výstup po každém řádku\n"
+"  -H, --with-filename       u výstupních řádků vypisuje název souboru\n"
+"  -h, --no-filename         potlačí předřazování jména souboru na výstupu\n"
+"      --label=NÁZEV         použije NÁZEV jako označení standardního\n"
+"                            vstupu na výstupu\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       zobrazí pouze neprázdné části odpovídajících "
+"řádků\n"
+"  -q, --quiet, --silent     potlačí obvyklý výstup\n"
+"      --binary-files=TYP    definuje typ binárních souborů\n"
+"                            TYP může být: „binary“ (binární), "
+"„text“ (textový)\n"
+"                            nebo „without-match“ (bez vyhovění vzorku)\n"
+"  -a, --text                jako --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        jako --binary-files=without-match\n"
+"  -d, --directories=AKCE    jak zpracovávat adresáře. AKCE může být:\n"
+"                            „read“ (číst), „recurse“ (rekurze),\n"
+"                            „skip“ (přeskočit)\n"
+"  -D, --devices=AKCE        jak zpracovávat zařízení, FIFO (roury) a "
+"sockety,\n"
+"                            AKCE může být: „read“ (číst) nebo "
+"„skip“ (přeskočit)\n"
+"  -r, --recursive           jako --directories=recurse\n"
+"  -R, --dereference-recursive\n"
+"                            obdobně, jen následuje všechny symbolické "
+"odkazy\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=GLOB        prohledá pouze soubory, které vyhovují GLOBU\n"
+"      --exclude=GLOB        přeskočí soubory, které vyhovují GLOBU\n"
+"      --exclude-from=SOUBOR přeskočí soubory, které vyhovují jakémukoliv "
+"vzorku\n"
+"                            ze SOUBORU\n"
+"      --exclude-dir=GLOB    přeskočí adresáře, které vyhovují GLOBU\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match vypíše pouze názvy souborů, ze kterých nebyly\n"
+"                            vybrány žádné řádky\n"
+"  -l, --files-with-matches  vypíše pouze názvy souborů, ze kterých byly "
+"vybrány\n"
+"                            řádky\n"
+"  -c, --count               vypíše pouze počet vyhovujících řádků na SOUBOR\n"
+"  -T, --initial-tab         zarovná začátky řádků tabulátory (je-li třeba)\n"
+"  -Z, --null                vypíše nulový bajt za jménem SOUBORU\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Řízení kontextu:\n"
+"  -B, --before-context=POČET vypíše POČET řádků před shodou\n"
+"  -A, --after-context=POČET  vypíše POČET řádků za shodou\n"
+"  -C, --context=POČET        vypíše POČET řádků kontextu (před i za shodou)\n"
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -POČET                     stejné jako --context=POČET\n"
+"      --group-separator=ODDĚLOVAČ\n"
+"                             vypisuje ODDĚLOVAČ na řádku mezi shodami\n"
+"                             s kontextem\n"
+"      --no-group-separator   nevypisuje oddělovač shod s kontextem\n"
+"      --color[=KDY],\n"
+"      --colour[=KDY]         použije barev k rozlišení vyhovujících "
+"řetězců,\n"
+"                             KDY může být „always“ (vždy), „never“ (nikdy)\n"
+"                             nebo „auto“ (automaticky)\n"
+"  -U, --binary               neodstraňuje znak CR na konci řádku (MSDOS/"
+"Windows)\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Je-li SOUBOR -, čte standardní vstup. Ne-li SOUBOR zadán, čte „.“,\n"
+"je-li přítomen přepínač -r, jinak čte standardní vstup. Jestliže jsou\n"
+"zadány méně než dva SOUBORY, pak je výchozí přepínač -h.\n"
+"Návratový kód je 0 při nalezení vyhovujícího řádku, jinak 1.\n"
+"Vyskytne-li se chyba a není-li zadán přepínač -q, bude vrácen kód 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "zadány kolidující vzorky"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"V programu přeloženém s přepínačem --disable-perl-regexp nejsou perlové "
+"výrazy podporovány"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "neplatný syntaxe vzorku %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "neznámá metoda obsluhy zařízení"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr "pozor: přepínač --unix-byte-offsets (-u) je zastaralý"
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "neplatný maximální počet"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "neznámý typ binárního souboru"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Napsal Mike Haertel a další, vizte\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "alokace paměti pro JIT zásobník PCRE selhala"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P podporuje pouze jednobajtová a UTF-8 národní prostředí"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "přepínač -P lze být použít pouze s jedním vzorkem"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "vnitřní chyba (to by se nikdy nemělo stát)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "překročeno omezení PCRE na délku řádku"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: paměť vyčerpána"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: JIT zásobník knihovny PCRE vyčerpán"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: překročeno omezení PCRE na délku návratu"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: překročeno omezení PCRE na hloubku zanoření"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: vnitřní chyba PCRE: %d"
+
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr ""
+#~ "pozor: proměnná GREP_OPTIONS je zastaralá, prosím, použijte alias nebo "
+#~ "skript"
+
+#~ msgid "warning: %s: %s"
+#~ msgstr "varování: %s: %s"
+
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "Domovská stránka programu %s: <https://www.gnu.org/software/%s/>\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "neplatný argument „%3$s“ u %1$s%2$s"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "neplatná přípona argumentu „%3$s“ u %1$s%2$s"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "argument „%3$s“ u %1$s%2$s je příliš dlouhý"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "internal error"
+#~ msgstr "vnitřní chyba"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: přepínač „--%s“ musí být zadán bez argumentu\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: neznámý přepínač „--%s“\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: přepínač „-W %s“ není jednoznačný\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: přepínač „-W %s“ musí být zadán bez argumentu\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: přepínač „-W %s“ vyžaduje argument\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "posun v souboru (lseek) se nezdařil"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr ""
+#~ "VZOREK představuje základní regulární výraz (BRE), pokud není řečeno "
+#~ "jinak.\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "„egrep“ znamená „grep -E“. „fgrep“ znamená „grep -F“.\n"
+#~ "Přímé spouštění příkazem „egrep“ nebo „fgrep“ je zastaralé.\n"
+
+#~ msgid "unescaped ^ or $ not supported with -Pz"
+#~ msgstr "s přepínači -Pz nejsou podporovány neescapované znaky ^ a $"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "Domovská stránka GNU Grepu: <%s>\n"
+
+#~ msgid "invalid UTF-8 byte sequence in input"
+#~ msgstr "neplatná posloupnost UTF-8 bajtů ve vstupu"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "VZOREK představuje rozšířený regulární výraz (ERE).\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr "Spouštění programu jako „egrep“ je zastaralé; použijte „grep -E“.\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr "VZOREK představuje množinu řetězců, každý na novém řádku.\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr "Spouštění programu jako „fgrep“ je zastaralé; použijte „grep -F“.\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s umí pouze syntaxi vzorků %s"
+
+#~ msgid "the --mmap option has been a no-op since 2010"
+#~ msgstr "přepínač --map nic nedělá již od roku 2010"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "neukončený zápis počtu opakování"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "deformovaný zápis počtu opakování"
+
+#~ msgid "writing output"
+#~ msgstr "zapisuje se výstup"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity needs a value (\"=...\"); "
+#~ "skipped"
+#~ msgstr ""
+#~ "Schopnost „%2$s“ v GREP_COLORS=\"%1$s\" potřebuje hodnotu („=…“); "
+#~ "přeskočena"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity is boolean and cannot take a "
+#~ "value (\"=%s\"); skipped"
+#~ msgstr ""
+#~ "Schopnost „%2$s“ v GREP_COLORS=\"%1$s\" je pravdivostního typu a nemůže "
+#~ "nést hodnotu („=%3$s“); přeskočena"
+
+#~ msgid "in GREP_COLORS=\"%s\", the \"%s\" capacity %s"
+#~ msgstr "V GREP_COLORS=\"%s\" schopnost „%s“ %s"
+
+#~ msgid ""
+#~ "stopped processing of ill-formed GREP_COLORS=\"%s\" at remaining "
+#~ "substring \"%s\""
+#~ msgstr ""
+#~ "Zpracování chybně utvořeného GREP_COLORS=\"%s\" zastaveno na zbývajícím "
+#~ "podřetězci „%s“"
+
+#~ msgid "unknown directories method"
+#~ msgstr "neznámá metoda obsluhy adresářů"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE;\n"
+#~ "                            TYPE is `binary', `text', or `without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories;\n"
+#~ "                            ACTION is `read', `recurse', or `skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+#~ "                            ACTION is `read' or `skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=FILE_PATTERN  search only files that match FILE_PATTERN\n"
+#~ "      --exclude=FILE_PATTERN  skip files and directories matching "
+#~ "FILE_PATTERN\n"
+#~ "      --exclude-from=FILE   skip files matching any file pattern from "
+#~ "FILE\n"
+#~ "      --exclude-dir=PATTERN directories that match PATTERN will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match print only names of FILEs containing no "
+#~ "match\n"
+#~ "  -l, --files-with-matches  print only names of FILEs containing matches\n"
+#~ "  -c, --count               print only a count of matching lines per "
+#~ "FILE\n"
+#~ "  -T, --initial-tab         make tabs line up (if needed)\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Řízení výstupu:\n"
+#~ "  -m, --max-count=ČÍSLO     skončí, pokud najde ČÍSLO výrazů\n"
+#~ "  -b, --byte-offset         s každým výstupním řádkem vypíše jeho pozici\n"
+#~ "                            v souboru\n"
+#~ "  -n, --line-number         s každým výstupním řádkem vypíše jeho číslo "
+#~ "řádku\n"
+#~ "      --line-buffered       vyprázdní výstup po každém řádku\n"
+#~ "  -H, --with-filename       s každým výstupním řádkem vypíše jméno "
+#~ "souboru\n"
+#~ "  -h, --no-filename         potlačí vypisování jména souboru s výst. "
+#~ "řádkem\n"
+#~ "      --label=NÁZEV         zobrazí NÁZEV jako název souboru na "
+#~ "standardním\n"
+#~ "                            vstupu\n"
+#~ "  -o, --only-matching       zobrazí pouze tu část řádku odpovídající "
+#~ "VZORKU\n"
+#~ "  -q, --quiet, --silent     potlačí obvyklý výstup\n"
+#~ "      --binary-files=TYP    definuje typ binárních souborů\n"
+#~ "                            TYP může být: „binary“ (binární), "
+#~ "„text“ (textový)\n"
+#~ "                            nebo „without-match“ (bez vyhovění vzorku)\n"
+#~ "  -a, --text                jako --binary-files=text\n"
+#~ "  -I                        jako --binary-files=without-match\n"
+#~ "  -d, --directories=AKCE    jak zpracovávat adresáře. AKCE může být:\n"
+#~ "                            „read“ (číst), „recurse“ (rekurze),\n"
+#~ "                            „skip“ (přeskočit)\n"
+#~ "  -D, --devices=AKCE        jak zpracovávat zařízení, FIFO (roury) a "
+#~ "sockety,\n"
+#~ "                            AKCE může být: „read“ (číst) nebo "
+#~ "„skip“ (přeskočit)\n"
+#~ "  -R, -r, --recursive       jako --directories=recurse\n"
+#~ "      --include=VZOREK      soubory, které vyhovují vzorku, budou "
+#~ "zpracovány\n"
+#~ "      --exclude=VZOREK      soubory, které vyhovují vzorku, budou "
+#~ "přeskočeny\n"
+#~ "      --exclude-from=SOUBOR soubory, které vyhovují vzorkům ze SOUBORu, "
+#~ "budou\n"
+#~ "                            přeskočeny\n"
+#~ "      --exclude-dir=VZOREK  adresáře, které vyhovují vzorku, budou "
+#~ "přeskočeny\n"
+#~ "  -L, --files-without-match vypíše pouze jména souborů, ve kterých nebyl\n"
+#~ "                            VZOREK nalezen\n"
+#~ "  -l, --files-with-matches  vypíše pouze jména souborů, ve kterých byl "
+#~ "VZOREK\n"
+#~ "                            nalezen\n"
+#~ "  -c, --count               vypíše pouze počet vyhovujících řádků na "
+#~ "SOUBOR\n"
+#~ "  -T, --initial-tab         zarovnání začátků řádků tabulátory (je-li "
+#~ "třeba)\n"
+#~ "  -Z, --null                vypíše nulový bajt za jménem SOUBORu\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "Přepínače -P a -z nemohou být kombinovány"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: neznámý přepínač -- %c\n"
+
+#~ msgid "Copyright (C) 2008 Free Software Foundation, Inc.\n"
+#~ msgstr "Copyright © 2008 Free Software Foundation, Inc.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions.  There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "Toto je volné programové vybavení; podmínky pro kopírování a rozšiřování\n"
+#~ "naleznete ve zdrojových textech. Toto programové vybavení je zcela BEZ "
+#~ "ZÁRUKY,\n"
+#~ "a to i bez záruky PRODEJNOSTI nebo VHODNOSTI PRO NĚJAKÝ KONKRÉTNÍ ÚČEL.\n"
diff --git a/src/grep/po/da.gmo b/src/grep/po/da.gmo
new file mode 100644
index 0000000..4284f0c
--- /dev/null
+++ b/src/grep/po/da.gmo
diff --git a/src/grep/po/da.po b/src/grep/po/da.po
new file mode 100644
index 0000000..826c9cd
--- /dev/null
+++ b/src/grep/po/da.po
@@ -0,0 +1,830 @@
+# Danish messages for GNU Grep
+# Copyright (C) 1996, 1997, 1998, 2009, 2012, 2015, 2017, 2019 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+#
+# Kenneth Christiansen <kenneth@gnome.org>, 1999.
+# Keld Simonsen <keld@dkuug.dk>, 2000
+# Ask Hjorth Larsen <asklarsen@gmail.com>, 2009, 2010, 2012, 2015, 2017, 2019.
+#
+# Konventioner
+# ------------
+#
+# escape -> undvigesekvens
+# standard input -> standard-inddata (etc.)
+# (basic/extended) regular expression -> (elementært/udvidet) regulært udtryk
+# match (n) -> træffer
+# match (v) -> matche (findes i RO)
+#
+# Specielt
+# --------
+#
+# NUM -> ANTAL
+#
+# Strenge i retning af "%s%s argument `%s'" er i stil
+# med "--file argument `hello.txt'" eller "-f argument `hello.txt'".
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep-3.3.42\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2019-12-27 00:28+0100\n"
+"Last-Translator: Ask Hjorth Larsen <asklarsen@gmail.com>\n"
+"Language-Team: Danish <dansk@dansk-gruppen.dk>\n"
+"Language: da\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8-bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "ugyldigt argument %s til %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "flertydigt argument %s til %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Gyldige argumenter er:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "programfejl"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "stakoverløb"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "skrivefejl"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "ubalanceret ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "ugyldig tegnklasse"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "syntaksen for tegnklasser er [[:space:]], ikke [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "ufærdig \\-undvigesekvens"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "ugyldigt indhold af \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "regulært udtryk er for stort"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "ubalanceret ("
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "ingen syntaks angivet"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "ubalanceret )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Ukendt systemfejl"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: flaget \"%s%s\" er flertydigt\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: flaget \"%s%s\" er flertydigt; muligheder:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: ukendt flag \"%s%s\"\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: flaget \"%s%s\" tillader ikke et argument\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: flaget \"%s%s\" kræver et argument\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: ugyldigt flag -- \"%c\"\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: flaget kræver et argument -- \"%c\"\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "hukommelse opbrugt"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "kan ikke gemme nuværende arbejdskatalog"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "kunne ikke vende tilbage til det oprindelige arbejdskatalog"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "kunne ikke angive tekst-/binærtilstand for fildeskriptor"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "\""
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "\""
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Succes"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Ingen træffere"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Ugyldigt regulært udtryk"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Ugyldigt samletegn (collation character)"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Ugyldigt tegnklassenavn"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Afsluttende omvendt skråstreg"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Ugyldig bagudreference"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Uparret [, [^, [:, [. eller [="
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "Uparret ( eller \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "Uparret \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Ugyldigt indhold af \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Ugyldig intervalafslutning"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Hukommelse opbrugt"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Ugyldigt foranstillet regulært udtryk"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Utidig afslutning af regulært udtryk"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Regulært udtryk er for stort"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "Uparret ) eller \\)"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Intet foregående regulært udtryk"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Pakket af %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Pakket af %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"GPLv3+-licens: GNU GPL version 3 eller senere <%s>.\n"
+"Dette er fri software: du kan frit ændre og videredistribuere det.\n"
+"Der gives INGEN GARANTI, i den grad som loven tillader det.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Skrevet af %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Skrevet af %s og %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Skrevet af %s, %s og %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Skrevet af %s, %s, %s\n"
+"og %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Skrevet af %s, %s, %s,\n"
+"%s og %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Skrevet af %s, %s, %s,\n"
+"%s, %s og %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Skrevet af %s, %s, %s,\n"
+"%s, %s, %s og %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Skrevet af %s, %s, %s,\n"
+"%s, %s, %s, %s\n"
+"og %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Skrevet af %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s og %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Skrevet af %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s og andre.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "Rapportér fejl til: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Rapportér fejl i %s til: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Hjemmeside for %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Generel hjælp til brug af GNU-software: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(standard-inddata)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "ugyldigt kontekstlængdeargument"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "inddata er for omfattende at optælle"
+
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "Binær fil %s stemmer\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "rekursiv katalogsløjfe"
+
+#: src/grep.c:1899
+#, fuzzy, c-format
+msgid "%s: input file is also the output"
+msgstr "indfilen %s er også udfilen"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Brug: %s [FLAG]... MØNSTRE [FIL]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Prøv \"%s --help\" for mere information.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Søg efter MØNSTRE i hver FIL.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Eksempel: %s -i 'hej verden' menu.h main.c\n"
+"MØNSTRE kan indeholde flere mønstre adskilt af linjeskift.\n"
+"\n"
+"Valg af mønster og fortolkning:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     MØNSTRE er udvidede regulære udtryk\n"
+"  -F, --fixed-strings       MØNSTRE er strenge\n"
+"  -G, --basic-regexp        MØNSTRE er elementære regulære udtryk\n"
+"  -P, --perl-regexp         MØNSTRE er regulære udtryk til Perl\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=MØNSTRE      brug MØNSTRE i søgning\n"
+"  -f, --file=FIL            tag MØNSTRE fra FIL\n"
+"  -i, --ignore-case         skeln ikke mellem store og små bogstaver\n"
+"                              i mønstre og data\n"
+"      --no-ignore-case      skeln mellem store/små bogstaver (standard)\n"
+"  -w, --word-regexp         match kun hele ord\n"
+"  -x, --line-regexp         match kun hele linjer\n"
+"  -z, --null-data           en datalinje slutter med en 0-byte, ikke "
+"linjeskift\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Diverse:\n"
+"  -s, --no-messages         undertryk fejlmeddelser\n"
+"  -v, --invert-match        vælg linjer der ikke passer\n"
+"  -V, --version             vis versionsinformation og afslut\n"
+"      --help                vis denne hjælpetekst og afslut\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Styring af udskrift:\n"
+"  -m, --max-count=ANTAL      stands efter ANTAL fundne linjer\n"
+"  -b, --byte-offset          udskriv startpunkt i byte sammen med fundne "
+"linjer\n"
+"  -n, --line-number          udskriv linjenummer sammen med linjerne\n"
+"      --line-buffered        tøm uddatabuffer for hver linje\n"
+"  -H, --with-filename        udskriv filnavn sammen med udlinjer\n"
+"  -h, --no-filename          undertryk indledende filnavn i udskrift\n"
+"      --label=NAVN           udskriv NAVN som filnavn for standard-inddata\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       vis kun ikketomme dele af matchende linjer\n"
+"  -q, --quiet, --silent     undertryk al normal udskrift\n"
+"      --binary-files=TYPE   antag at binære filer er TYPE;\n"
+"                            TYPE er \"binary\", \"text\" eller \"without-"
+"match\"\n"
+"  -a, --text                svarer til --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        svarer til --binary-files=without-match\n"
+"  -d, --directories=HANDLING  hvordan kataloger skal håndteres;\n"
+"                            HANDLING er \"read\", \"recurse\", eller \"skip"
+"\"\n"
+"  -D, --devices=HANDLING    hvordan enheder, FIFO'er og sokler skal "
+"håndteres;\n"
+"                            HANDLING er \"read\" eller \"skip\"\n"
+"  -r, --recursive           svarer til --directories=recurse\n"
+"  -R, --dereference-recursive  tilsvarende, men følg alle symlænker\n"
+
+# 'spring over' er måske pænere end 'ignorér', men fylder mere, og det er rart at være på <80 kolonner
+#: src/grep.c:2023
+#, fuzzy, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=GLOB        søg kun i filer, der matcher GLOB (et "
+"filmønster)\n"
+"      --exclude=GLOB        ignorér filer og kataloger, der matcher GLOB\n"
+"      --exclude-from=FIL    ignorér filer, der matcher ethvert mønster fra "
+"FIL\n"
+"      --exclude-dir=glob    ignorér kataloger, der matcher GLOB\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match  udskriv kun navne på FILer uden fundne linjer\n"
+"  -l, --files-with-matches  udskriv kun navne på FILer med fundne linjer\n"
+"  -c, --count               udskriv kun antallet af fundne linjer for hver "
+"FIL\n"
+"  -T, --initial-tab         arrangér tabulatortegn (om nødvendigt)\n"
+"  -Z, --null                udskriv 0-byte efter FILnavn\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Styring af kontekst:\n"
+"  -B, --before-context=ANTAL  udskriv ANTAL linjer af foregående tekst\n"
+"  -A, --after-context=ANTAL  udskriv ANTAL linjer af efterfølgende tekst\n"
+"  -C, --context=ANTAL       udskriv ANTAL linjer af omgivende tekst\n"
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -ANTAL                    det samme som --context=ANTAL\n"
+"      --color[=HVORNÅR],\n"
+"      --colour[=HVORNÅR]    brug farvemarkering til at fremhæve træffere;\n"
+"                            HVORNÅR er \"always\", \"never\", eller \"auto"
+"\"\n"
+"  -U, --binary              fjern ikke CR-tegn ved EOL (MSDOS/Windows)\n"
+
+#: src/grep.c:2052
+#, fuzzy, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Når FIL er \"-\", læses standard-inddata.  Uden FIL læses \".\" i\n"
+"rekursiv tilstand, ellers \"-\". Givet mindre end to FILer antages -h.\n"
+"Slutstatus er 0 hvis mindst én linje (eller fil med -L) blev valgt, ellers "
+"1;\n"
+"hvis der opstår en fejl, og -q ikke blev givet, er afslutningsstatus 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "modstridende søgeudtryk angivet"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"Perl-matching understøttes ikke hvis kompileret med --disable-perl-regexp"
+
+# en 'matcher' er tydeligvis et substantiv her... mystisk
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "ugyldig matcher %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "ukendt enhedsmetode"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "ugyldig angivelse af maksimum"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "ukendt binær filtype"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Skrevet af Mike Haertel med flere; se\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "kunne ikke allokere hukommelse til PCRE JIT-stakken"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P understøtter kun unibyte- og UTF-8-sprogindstillinger"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "flaget -P understøtter kun et enkelt mønster"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "intern fejl (burde aldrig ske)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "overskred maksimal linjelængde for PCRE"
+
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "hukommelse opbrugt"
+
+#: src/pcresearch.c:310
+#, fuzzy, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "PCRE JIT-stak tømt"
+
+#: src/pcresearch.c:315
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "overskred tilbagerækkevidde for PCRE"
+
+#: src/pcresearch.c:319
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "overskred tilbagerækkevidde for PCRE"
+
+#: src/pcresearch.c:327
+#, fuzzy, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "intern PCRE-fejl: %d"
+
+#, c-format
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr ""
+#~ "advarsel: GREP_OPTIONS er forældet; brug venligst et alias eller skript"
+
+#, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "advarsel: %s: %s"
+
+#~ msgid "%s home page: <http://www.gnu.org/software/%s/>\n"
+#~ msgstr "Hjemmeside for %s: <http://www.gnu.org/software/%s/>\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "ugyldigt %s%s-argument \"%s\""
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "ugyldigt suffiks i %s%s-argumentet \"%s\""
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "%s%s-argumentet \"%s\" er for stort"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "internal error"
+#~ msgstr "intern fejl"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: flaget \"--%s\" tillader ikke et argument\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: ukendt flag \"--%s\"\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: flaget \"-W %s\" er flertydigt\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: flaget \"-W %s\" tillader ikke et argument\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: flaget \"-W %s\" kræver et argument\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "lseek mislykkedes"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "\"egrep\" betyder \"grep -E\".  \"fgrep\" betyder \"grep -F\".\n"
+#~ "Direkte kørsel som enten \"egrep\" eller \"fgrep\" er forældet.\n"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "MØNSTER er et udvidet regulært udtryk (ERE).\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr "Kørsel som \"egrep\" er forældet; brug \"grep -E\" i stedet.\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr "MØNSTER er en mængde faste strenge adskilt af linjeskift.\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr "Kørsel som \"fgrep\" er forældet; brug \"grep -F\" i stedet.\n"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "Hjemmeside for GNU Grep: <%s>\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s kan kun bruge %s-mønstersyntaksen"
+
+#~ msgid "the --mmap option has been a no-op since 2010"
+#~ msgstr "tilvalget --mmap har været no-op siden 2010"
diff --git a/src/grep/po/de.gmo b/src/grep/po/de.gmo
new file mode 100644
index 0000000..ec8c10f
--- /dev/null
+++ b/src/grep/po/de.gmo
diff --git a/src/grep/po/de.po b/src/grep/po/de.po
new file mode 100644
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--- /dev/null
+++ b/src/grep/po/de.po
@@ -0,0 +1,758 @@
+# Deutsche Übersetzungen für Meldungen von GNU grep.
+# Copyright © 1997-99, 2000, 2001, 2002 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Martin von Löwis <martin@mira.isdn.cs.tu-berlin.de>, 1997-99, 2000-2002.
+# Philipp Thomas <pth@suse.de>, 2012-2013, 2015-2016.
+# Mario Blättermann <mario.blaettermann@gmail.com>, 2014, 2019-2021.
+msgid ""
+msgstr ""
+"Project-Id-Version: GNU grep 3.5.16\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-01-27 18:27+0100\n"
+"Last-Translator: Mario Blättermann <mario.blaettermann@gmail.com>\n"
+"Language-Team: German <translation-team-de@lists.sourceforge.net>\n"
+"Language: de\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"X-Generator: Lokalize 20.12.1\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "ungültiges Argument %s für %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "mehrdeutiges Argument %s für %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Gültige Argumente sind:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "Programmfehler"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "Stack-Überlauf"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "Schreibfehler"
+
+# Is this message used only for [ without matching ],
+# or for ] without [ as well?
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "[ ohne schließendes Gegenstück"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "Ungültige Zeichenklasse"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "die Syntax für Zeichenklassen ist [[:space:]], nicht [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "unbeendete \\-Escape-Sequenz"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "Ungültiger Inhalt von \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "Der reguläre Ausdruck ist zu groß"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "( ohne schließendes Gegenstück"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "es wurde keine Syntax angegeben"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "Schließende ) ohne öffnendes Gegenstück"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Unbekannter Systemfehler"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: Option „%s%s“ ist mehrdeutig\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: die Option „%s%s“ ist mehrdeutig; Mögliche Bedeutungen:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: unbekannte Option „%s%s“\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: Option „%s%s“ erlaubt kein Argument\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: Option „%s%s“ benötigt ein Argument\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: ungültige Option -- „%c“\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: Option erfordert ein Argument -- „%c“\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "Speicher ausgeschöpft"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "das aktuelle Verzeichnis kann nicht aufgezeichnet werden"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "die Rückkehr in das ursprüngliche Arbeitsverzeichnis war nicht möglich"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "Text-/Binärmodus des Dateideskriptors konnte nicht gesetzt werden"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "„"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "“"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Erfolg"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Keine Übereinstimmung"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Ungültiger regulärer Ausdruck"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Ungültiges Suchzeichen"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Ungültiger Zeichenklassenname"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Rückschrägstrich am Ende"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Ungültige Rückwärtsreferenz"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Kein Gegenstück für [, [^, [:, [., oder [="
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "Kein Gegenstück für ( oder \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "Kein Gegenstück für \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Ungültiger Inhalt von \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Ungültiges Bereichsende"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Speicher ausgeschöpft"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Ungültiger vorhergehender regulärer Ausdruck"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Vorzeitiges Ende des regulären Ausdrucks"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Der reguläre Ausdruck ist zu groß"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "Kein Gegenstück für ) oder \\)"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Kein vorhergehender regulärer Ausdruck"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Gepackt von %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Gepackt von %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Lizenz GPLv3+: GNU GPL Version 3 oder neuer <%s>.\n"
+"Dies ist freie Software: Sie können sie ändern und weitergeben.\n"
+"Es gibt keinerlei Garantien, soweit gesetzlich zulässig.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Geschrieben von %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Geschrieben von %s und %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Geschrieben von %s, %s und %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Geschrieben von %s, %s, %s\n"
+"und %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Geschrieben von %s, %s, %s,\n"
+"%s und %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Geschrieben von %s, %s, %s,\n"
+"%s, %s und %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Geschrieben von %s, %s, %s,\n"
+"%s, %s, %s und %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Geschrieben von %s, %s, %s,\n"
+"%s, %s, %s, %s\n"
+"und %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Geschrieben von %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s und %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Geschrieben von %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s und anderen.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"Melden Sie Übersetzungsfehler an <translation-team-de@lists.sourceforge."
+"net>,\n"
+"Programmfehler dagegen (auf Englisch, mit LC_ALL=C) an %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Melden Sie Programmfehler für %s (auf Englisch, mit LC_ALL=C) an %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "%s Homepage: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Allgemeine Hilfe zur Benutzung von GNU-Software: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(Standardeingabe)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "ungültiges Argument für die Kontextlänge"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "die Eingabe ist zu groß, um gezählt zu werden"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: Übereinstimmungen in Binärdatei"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: Warnung: rekursive Verzeichnisschleife"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: die Eingabedatei ist auch die Ausgabedatei"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Aufruf: %s [OPTION]… MUSTER [DATEI]…\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "„%s --help“ liefert weitere Informationen.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Nach MUSTER in jeder DATEI oder der Standardeingabe suchen.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Beispiel: %s -i 'Hallo Welt' menu.h main.c\n"
+"MUSTER kann mehrere durch Zeilenumbruch getrennte Muster enthalten.\n"
+"\n"
+"Auswahl und Interpretation von Mustern:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     MUSTER sind erweiterte reguläre Ausdrücke\n"
+"  -F, --fixed-strings       MUSTER sind Zeichenketten\n"
+"  -G, --basic-regexp        MUSTER sind reguläre Standardausdrücke\n"
+"  -P, --perl-regexp         MUSTER sind reguläre Ausdrücke, wie Perl\n"
+"                            sie akzeptiert\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=MUSTER       MUSTER zur Treffersuche verwenden\n"
+"  -f, --file=DATEI          MUSTER aus DATEI lesen\n"
+"  -i, --ignore-case         Unterschied zwischen Groß- und Kleinschreibung\n"
+"                             ignorieren\n"
+"      --no-ignore-case      Festlegung zur Groß- oder Kleinschreibung\n"
+"                              nicht ignorieren\n"
+"  -w, --word-regexp         MUSTER passt nur auf ganze Wörter\n"
+"  -x, --line-regexp         MUSTER passt nur auf ganze Zeilen\n"
+"  -z, --null-data           Eine Zeile endet mit Nullbyte, nicht Newline\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Verschiedenes:\n"
+"  -s, --no-messages         Fehlermeldungen unterdrücken\n"
+"  -v, --invert-match        Nicht-passende Zeilen anzeigen\n"
+"  -V, --version             Versionsnummer ausgeben und beenden\n"
+"      --help                Diese Hilfe ausgeben und beenden\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Steuerung der Ausgabe:\n"
+"  -m, --max-count=ANZAHL    stoppt nach ANZAHL ausgewählter Zeilen\n"
+"  -b, --byte-offset         gibt mit den Zeilen auch den Abstand in Bytes "
+"an\n"
+"  -n, --line-number         gibt mit den Zeilen auch die Zeilennummer an\n"
+"      --line-buffered       leert den Puffer nach jeder Zeile\n"
+"  -H, --with-filename       gibt den Dateinamen für jede Übereinstimmung "
+"aus\n"
+"  -h, --no-filename         unterdrückt die Ausgabe des vorangehenden\n"
+"                             Dateinamens\n"
+"      --label=BEZEICHNUNG   verwendet BEZEICHNUNG als Präfix für Dateinamen\n"
+"                            der Standardeingabe\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       zeigt nur den nicht-leeren Teil einer Zeile,\n"
+"                            der zu MUSTER passt\n"
+"  -q, --quiet, --silent     unterdrückt alle normalen Ausgaben\n"
+"      --binary-files=TYP    alle binären Dateien sind vom Typ TYP;\n"
+"                            TYP kann „binary“, „text“ oder „without-match“\n"
+"                             sein\n"
+"  -a, --text                gleichbedeutend mit --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        gleichbedeutend mit --binary-files=without-"
+"match\n"
+"  -d, --directories=AKTION  beschreibt, wie Verzeichnisse zu behandeln "
+"sind;\n"
+"                              AKTION kann „read“, „recurse“ oder „skip“ "
+"sein\n"
+"  -D, --devices=AKTION      Behandlung von Geräten, FIFOs oder Sockets;\n"
+"                              AKTION kann „read“ oder „skip“ sein\n"
+"  -r, --recursive           wie --directories=recurse\n"
+"  -R, --dereference-recursive\n"
+"                            ebenso, folgt aber allen symbolischen Links\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=DATEIMUSTER  durchsucht nur Dateien, die DATEIMUSTER\n"
+"                              entsprechen\n"
+"      --exclude=DATEIMUSTER  überspringt Dateien, die\n"
+"                              DATEIMUSTER entsprechen\n"
+"      --exclude-from=DATEI   überspringt Dateien, die einem Dateimuster\n"
+"                              in DATEI entsprechen.\n"
+"      --exclude-dir=MUSTER   überspringt Verzeichnisse, die MUSTER\n"
+"                              entsprechen\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match  nur die Namen von Dateien ausgeben, die keinen\n"
+"                              passenden Inhalt haben\n"
+"  -l, --files-with-matches   nur die Namen von Dateien mit passendem Inhalt\n"
+"                              ausgeben\n"
+"  -c, --count                nur die Anzahl der passenden Zeilen pro DATEI\n"
+"                              ausgeben\n"
+"  -T, --initial-tab          Tabulatoren (wenn nötig) ausrichten\n"
+"  -Z, --null                 ein 0-Byte nach einem Dateinamen ausgeben\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Kontextsteuerung:\n"
+"  -B, --before-context=ANZAHL  ANZAHL Zeilen vorausgehenden Kontextes\n"
+"                                ausgeben\n"
+"  -A, --after-context=ANZAHL   ANZAHL Zeilen nachfolgenden Kontextes\n"
+"                                ausgeben\n"
+"  -C, --context=ANZAHL         ANZAHL Zeilen Kontext ausgeben\n"
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -ANZAHL                   Wie --context=ANZAHL\n"
+"      --color[=WANN], \n"
+"      --colour=[WANN]       Passende Textfragmente markieren\n"
+"                            WANN kann „always“, „never“ oder „auto“ sein\n"
+"  -U, --binary              CR-Zeichen am Zeilenende belassen\n"
+"                             (MSDOS/Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Wenn DATEI „-“ ist, wird die Standardeingabe gelesen. Ohne DATEI wird „.“\n"
+"gelesen, wenn -r auf der Befehlszeile angegeben wurde, ansonsten „-“.\n"
+"Wenn weniger als zwei DATEIen angegeben wurden, wird -h angenommen.\n"
+"Der Rückgabewert ist 0, wenn eine Zeile passte, ansonsten 1. Wenn ein\n"
+"Fehler auftrat und -q nicht angegeben wurde, ist der Rückgabewert 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "die angegebenen Suchmuster stehen in Konflikt zueinander"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"Perl-basierte Treffersuche wurde in dieses --disable-perl-regexp-Binary "
+"nicht einkompiliert"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "ungültige Entsprechung %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "Unbekannte Methode für Gerätedateien"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "ungültige Maximalanzahl"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "unbekannter Typ für Binärdateien"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Geschrieben von Mike Haertel und anderen; siehe\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "es konnte kein Speicher für den PCRE-JIT-Stack reserviert werden"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P unterstützt nur Unibyte- oder UTF-8-Locales"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "Die Option -P unterstützt nur ein einzelnes Suchmuster"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "Interner Fehler (sollte nie vorkommen)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "Überschreitung der zulässigen Zeilenlänge von PCREs"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: Speicher ausgeschöpft"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: Kellerspeicher für PCRE JIT ist erschöpft"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: Überschreitung der Zurückverfolgungsbeschränkung des PCREs"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: Überschreitung der Rekursionsbeschränkung des PCREs"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: interner PCRE-Fehler: %d"
diff --git a/src/grep/po/el.gmo b/src/grep/po/el.gmo
new file mode 100644
index 0000000..2e98c80
--- /dev/null
+++ b/src/grep/po/el.gmo
diff --git a/src/grep/po/el.po b/src/grep/po/el.po
new file mode 100644
index 0000000..17a990f
--- /dev/null
+++ b/src/grep/po/el.po
@@ -0,0 +1,866 @@
+# Greek messages for GNU grep
+# This file is distributed under the same license as the grep package.
+# Copyright (C) 1998, 2002 Free Software Foundation, Inc.
+# Simos Xenitellis <simos@hellug.gr>, 1998, 2002.
+# Savvas Radevic <vicedar@gmail.com>, 2012.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 2.11.11-pre1\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2012-05-05 23:23+0100\n"
+"Last-Translator: Savvas Radevic <vicedar@gmail.com>\n"
+"Language-Team: Greek <team@lists.gnome.gr>\n"
+"Language: el\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"X-Poedit-Language: Greek\n"
+"X-Poedit-Country: GREECE\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "άκυρη επιλογή %s για %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "διφορούμενη επιλογή %s για %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Έγκυρες επιλογές είναι οι εξής:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr ""
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr ""
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "σφάλμα εγγραφής"
+
+# src/dfa.c:652 src/dfa.c:655 src/dfa.c:682 src/dfa.c:686 src/dfa.c:687
+# src/dfa.c:690 src/dfa.c:703 src/dfa.c:704
+# src/dfa.c:660 src/dfa.c:663 src/dfa.c:690 src/dfa.c:694 src/dfa.c:695
+# src/dfa.c:698 src/dfa.c:711 src/dfa.c:712
+#: lib/dfa.c:896
+#, fuzzy
+msgid "unbalanced ["
+msgstr "Μη ισορροπημένο ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "άκυρη κατηγορία χαρακτήρων"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "η σύνταξη κατηγορίας χαρακτήρων είναι [[:space:]], όχι [:space:]"
+
+# src/dfa.c:444
+# src/dfa.c:452
+#: lib/dfa.c:1210
+#, fuzzy
+msgid "unfinished \\ escape"
+msgstr "Μη τερματισμένος χαρακτήρας διαφυγής \\"
+
+# src/dfa.c:556 src/dfa.c:562 src/dfa.c:573 src/dfa.c:584
+# src/dfa.c:564 src/dfa.c:570 src/dfa.c:581 src/dfa.c:592
+#: lib/dfa.c:1371
+#, fuzzy
+msgid "invalid content of \\{\\}"
+msgstr "μη έγκυρος μέγιστος μετρητής"
+
+#: lib/dfa.c:1374
+#, fuzzy
+msgid "regular expression too big"
+msgstr "Υπερβολικά μεγάλη η κανονική έκφραση"
+
+# src/dfa.c:841
+# src/dfa.c:849
+#: lib/dfa.c:1858
+#, fuzzy
+msgid "unbalanced ("
+msgstr "Μη ισορροπημένο ("
+
+# src/dfa.c:962
+# src/dfa.c:970
+#: lib/dfa.c:1975
+#, fuzzy
+msgid "no syntax specified"
+msgstr "Δεν ορίστηκε συντακτικό"
+
+# src/dfa.c:970
+# src/dfa.c:978
+#: lib/dfa.c:1986
+#, fuzzy
+msgid "unbalanced )"
+msgstr "Μη ισορροπημένο )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Άγνωστο λάθος συστήματος"
+
+# src/getopt.c:813
+# src/getopt.c:813
+#: lib/getopt.c:278
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: η επιλογή «-W %s» είναι διφορούμενη\n"
+
+# src/getopt.c:628
+# src/getopt.c:628
+#: lib/getopt.c:284
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: η επιλογή «%s» είναι διφορούμενη\n"
+
+# src/getopt.c:707
+# src/getopt.c:707
+#: lib/getopt.c:319
+#, fuzzy, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: μη αναγνωρίσιμη επιλογή «%c%s»\n"
+
+# src/getopt.c:657
+# src/getopt.c:657
+#: lib/getopt.c:345
+#, fuzzy, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: η επιλογή «%c%s» δεν επιτρέπει ορίσματα\n"
+
+# src/getopt.c:674 src/getopt.c:847
+# src/getopt.c:674 src/getopt.c:847
+#: lib/getopt.c:360
+#, fuzzy, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: η επιλογή «%s» απαιτεί όρισμα\n"
+
+# src/getopt.c:736
+# src/getopt.c:736
+#: lib/getopt.c:621
+#, fuzzy, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: μη έγκυρη επιλογή -- %c\n"
+
+# src/getopt.c:766 src/getopt.c:896
+# src/getopt.c:766 src/getopt.c:896
+#: lib/getopt.c:636 lib/getopt.c:682
+#, fuzzy, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: η επιλογή απαιτεί ένα όρισμα -- %c\n"
+
+# src/grep.c:144 src/grep.c:161 src/grep.c:222 src/grep.c:263 src/kwset.c:184
+# src/kwset.c:190
+# src/grep.c:164 src/grep.c:181 src/grep.c:283 src/grep.c:338 src/kwset.c:184
+# src/kwset.c:190
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "η μνήμη εξαντλήθηκε"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "δεν είναι δυνατή η καταγραφή του τρέχοντος φακέλου εργασίας"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "αποτυχία επιστροφής στον αρχικό φάκελο εργασίας"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr ""
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "«"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "»"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Επιτυχία"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Καμία αντιστοιχία"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Άκυρη κανονική έκφραση"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr ""
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr ""
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr ""
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr ""
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr ""
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr ""
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr ""
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr ""
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Άκυρο τέλος σειράς"
+
+# src/dfa.c:147 src/dfa.c:159 src/dfa.c:172
+# src/dfa.c:155 src/dfa.c:167 src/dfa.c:180 src/grep.c:827
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Η μνήμη εξαντλήθηκε"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Άκυρη προηγούμενης κανονικής έκφρασης"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Πρόωρο τέλος της κανονικής έκφρασης"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Υπερβολικά μεγάλη η κανονική έκφραση"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ""
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Καμία προηγούμενη κανονική έκφραση"
+
+#: lib/version-etc.c:73
+#, fuzzy, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Συσκευάστηκε από %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, fuzzy, c-format
+msgid "Packaged by %s\n"
+msgstr "Συσκευάστηκε από %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "(C)"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, fuzzy, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"\n"
+"Άδεια χρήσης GPLv3+: GNU GPL έκδοση 3 ή μεταγενέστερη <http://gnu.org/"
+"licenses/gpl.html>\n"
+"Αυτό είναι ελεύθερο λογισμικό: Είστε ελεύθεροι να το αλλάξετε και να το "
+"αναδιανέμετε.\n"
+"Δεν υπάρχει ΚΑΜΙΑ ΕΓΓΥΗΣΗ στην έκταση που επιτρέπεται από το νόμο.\n"
+"\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, fuzzy, c-format
+msgid "Written by %s.\n"
+msgstr "Συντάχθηκε από τον %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, fuzzy, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Συντάχθηκε από τους %s και %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, fuzzy, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Συντάχθηκε από τους %s, %s, και %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, fuzzy, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Συντάχθηκε από τους %s, %s, %s,\n"
+"και %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, fuzzy, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Συντάχθηκε από τους %s, %s, %s,\n"
+"%s, και %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, fuzzy, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Συντάχθηκε από τον %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, fuzzy, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Συντάχθηκε από τους %s, %s, %s,\n"
+"%s, %s, %s, και %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, fuzzy, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Συντάχθηκε από τους %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"και %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, fuzzy, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Συντάχθηκε από τους %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, και %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, fuzzy, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Συντάχθηκε από τους %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, και άλλους.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, fuzzy, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"\n"
+"Αναφορά σφαλμάτων: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Αναφορά %s σφαλμάτων: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "%s κεντρική σελίδα: <%s>\n"
+
+#: lib/version-etc.c:260
+#, fuzzy, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Γενική βοήθεια χρήσης λογισμικού GNU: <http://www.gnu.org/gethelp/>\n"
+
+# src/grep.c:964 src/grep.c:1015
+# src/grep.c:730
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(κανονική είσοδος)"
+
+# src/grep.c:785 src/grep.c:792
+# src/grep.c:1060 src/grep.c:1067 src/grep.c:1076
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "μη έγκυρο όρισμα μήκους περιεχομένου"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "η είσοδος είναι πολύ μεγάλη για να μετρηθεί"
+
+# src/grep.c:715
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "Το δυαδικό αρχείο %s ταιριάζει\n"
+
+# src/grep.c:844
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "αναδρομική αλληλοδιαδοχή καταλόγων"
+
+#: src/grep.c:1899
+#, fuzzy, c-format
+msgid "%s: input file is also the output"
+msgstr "το αρχείο εισαγωγής %s είναι επίσης το αρχείο εξόδου"
+
+# src/grep.c:597
+# src/grep.c:862
+#: src/grep.c:1961 src/grep.c:1968
+#, fuzzy, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Χρήση: %s [ΕΠΙΛΟΓΗ]... ΥΠΟΔΕΙΓΜΑ [ΑΡΧΕΙΟ]...\n"
+
+# src/grep.c:598
+# src/grep.c:863
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Δοκιμάστε «%s --help» για περισσότερες πληροφορίες.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr ""
+
+#: src/grep.c:1970
+#, fuzzy, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Εύρεση του ΥΠΟΔΕΙΓΜΑτος σε κάθε ΑΡΧΕΙΟ ή την κανονική είσοδο.\n"
+"Παράδειγμα: %s -i 'hello world' menu.h main.c\n"
+"\n"
+"Επιλογή κανονικής έκφρασης και ερμηνεία:\n"
+
+#: src/grep.c:1975
+#, fuzzy, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     ΥΠΟΔΕΙΓΜΑ είναι μια εκτεταμένη κανονική έκφραση\n"
+"  -F, --fixed-regexp        ΥΠΟΔΕΙΓΜΑ είναι στατικό αλφαριθμητικό διαχωρι-\n"
+"                              ζόμενο με χαρακτήρες αλλαγής γραμμής\n"
+"  -G, --basic-regexp        ΥΠΟΔΕΙΓΜΑ είναι απλή κανονική έκφραση\n"
+"  -P, --perl-regexp         ΥΠΟΔΕΙΓΜΑ είναι κανονική έκφραση Perl\n"
+
+# src/grep.c:603
+# src/grep.c:868
+#: src/grep.c:1981
+#, fuzzy, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=ΥΠΟΔΕΙΓΜΑ    χρήση ΥΠΟΔΕΙΓΜΑτος για κανονική έκφραση\n"
+"  -f, --file=ΑΡΧΕΙΟ         λήψη ΥΠΟΔΕΙΓΜΑτος από το αρχείο ΑΡΧΕΙΟ\n"
+"  -i, --ignore-case         αγνόησε διαφορές πεζών/κεφαλαίων\n"
+"  -w, --word-regexp         επιβολή του ΥΠΟΔΕΙΓΜΑτος να ταιριάζει μόνο\n"
+"                              ολόκληρες λέξεις\n"
+"  -x, --line-regexp         επιβολή του ΥΠΟΔΕΙΓΜΑτος να ταιριάζει μόνο\n"
+"                              ολόκληρες γραμμές\n"
+"  -z, --null-data           η γραμμή δεδομένων τερματίζεται με byte 0\n"
+"                              και όχι με χαρακτήρα αλλαγής γραμμής\n"
+
+# src/grep.c:615
+# src/grep.c:880
+#: src/grep.c:1989
+#, fuzzy, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Λοιπά:\n"
+"  -s, --no-messages         αποφυγή εμφάνισης μηνυμάτων σφαλμάτων\n"
+"  -v, --revert-match        επιλογή γραμμών που δεν ταιριάζουν\n"
+"  -V, --version             εμφάνισης πληροφοριών έκδοσης και έξοδος\n"
+"      --help                εμφάνισης αυτής της βοήθειας και έξοδος\n"
+"      --mmap                χρήση εισόδου απεικονισμένη-στη-μνήμη αν\n"
+"                              υπάρχει τέτοια δυνατότητα\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+
+#: src/grep.c:2036
+#, fuzzy, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Έλεγχος βάσει του περιεχομένου:\n"
+"  -B, --before-context=ΑΡΙΘΜΟΣ εμφάνιση ΑΡΙΘΜΟΣ γραμμών με ακολουθούμενο\n"
+"                              περιεχόμενο\n"
+"  -A, --after-context=ΑΡΙΘΜΟΣ  εμφάνιση ΑΡΙΘΜΟΣ γραμμών με προπορευόμενο\n"
+"                              περιεχόμενο\n"
+"  -C, --context=ΑΡΙΘΜΟΣ     εμφάνιση ΑΡΙΘΜΟΣ (εξ ορισμού 2) γραμμών με\n"
+"                              περιεχόμενο εξόδου\n"
+
+# src/grep.c:633
+# src/grep.c:902
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NUM                      το ίδιο με --context=ΑΡΙΘΜΟΣ\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to distinguish the matching string\n"
+"                            WHEN may be `always', `never' or `auto'.\n"
+"  -U, --binary              να μην απαλείφονται χαρακτήρες CR στο EOL "
+"(MSDOS)\n"
+"  -u, --unix-byte-offsets   αναφορά σχετικών θέσεων σα να μην υπήρχαν\n"
+"                              χαρακτήρες CR (MSDOS)\n"
+"\n"
+
+#: src/grep.c:2052
+#, fuzzy, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Χωρία ΑΡΧΕΙΟ, ή όταν το ΑΡΧΕΙΟ είναι -, διαβάζεται η κανονική είσοδος.\n"
+"Αν στα ορίσματα υπάρχουν λιγότερα από δύο ΑΡΧΕΙΑ, τότε υποτίθεται ότι έχει\n"
+"δοθεί η επιλογή -h.  Η κατάσταση εξόδου του προγράμματος είναι 0 αν βρέθηκε\n"
+"το ΥΠΟΔΕΙΓΜΑ, 1 αν δεν βρέθηκε και 2 αν προέκυψε κάποιο πρόβλημα.\n"
+
+# src/grep.c:829
+# src/grep.c:1112
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "ορίστηκαν αντικρουόμενα στοιχεία αναζήτησης"
+
+#: src/grep.c:2101
+#, fuzzy
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"η υποστήριξη για την επιλογή -P δεν είναι μεταγλωττισμένη σε αυτό το --"
+"disable-perl-regexp δυαδικό [αρχείο]"
+
+# src/dfa.c:556 src/dfa.c:562 src/dfa.c:573 src/dfa.c:584
+# src/dfa.c:564 src/dfa.c:570 src/dfa.c:581 src/dfa.c:592
+#: src/grep.c:2103
+#, fuzzy, c-format
+msgid "invalid matcher %s"
+msgstr "μη έγκυρος μέγιστος μετρητής"
+
+# src/grep.c:1133
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "άγνωστη μέθοδος συσκευών"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+# src/dfa.c:556 src/dfa.c:562 src/dfa.c:573 src/dfa.c:584
+# src/dfa.c:564 src/dfa.c:570 src/dfa.c:581 src/dfa.c:592
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "μη έγκυρος μέγιστος μετρητής"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "άγνωστο είδος δυαδικών αρχείων"
+
+#: src/grep.c:2829
+#, fuzzy
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"άλλοι, κοιτάξτε τον σύνδεσμο <http://git.sv.gnu.org/cgit/grep.git/tree/"
+"AUTHORS>"
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr ""
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "Η επιλογή -P υποστηρίζει μόνο ένα υπόδειγμα"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr ""
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr ""
+
+# src/grep.c:144 src/grep.c:161 src/grep.c:222 src/grep.c:263 src/kwset.c:184
+# src/kwset.c:190
+# src/grep.c:164 src/grep.c:181 src/grep.c:283 src/grep.c:338 src/kwset.c:184
+# src/kwset.c:190
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "η μνήμη εξαντλήθηκε"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr ""
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr ""
+
+#: src/pcresearch.c:327
+#, fuzzy, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "εσωτερικό σφάλμα"
+
+# src/grep.c:293
+# src/grep.c:366
+#, fuzzy, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "προειδοποίηση: %s: %s\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "άκυρη %s%s επιλογή «%s»"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "άκυρη κατάληξη στην %s%s επιλογή «%s»"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "η %s%s επιλογή «%s» είναι υπερβολικά μεγάλη"
+
+#, fuzzy
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "%s κεντρική σελίδα: <http://www.gnu.org/software/%s/>\n"
+
+#~ msgid "internal error"
+#~ msgstr "εσωτερικό σφάλμα"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+# src/getopt.c:652
+# src/getopt.c:652
+#, fuzzy
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: η επιλογή «--%s» δεν επιτρέπει ορίσματα\n"
+
+# src/getopt.c:703
+# src/getopt.c:703
+#, fuzzy
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: μη αναγνωρίσιμη επιλογή «--%s»\n"
+
+# src/getopt.c:813
+# src/getopt.c:813
+#, fuzzy
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: η επιλογή «-W %s» είναι διφορούμενη\n"
+
+# src/getopt.c:831
+# src/getopt.c:831
+#, fuzzy
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: η επιλογή «-W %s» δεν δέχεται ορίσματα\n"
+
+# src/getopt.c:674 src/getopt.c:847
+# src/getopt.c:674 src/getopt.c:847
+#, fuzzy
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: η επιλογή «%s» απαιτεί όρισμα\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "To «egrep» είναι ισοδύναμο του «grep -E». Το «fgrep» είναι ισοδύναμο του\n"
+#~ "«grep -F».\n"
+#~ "Η άμεση επίκληση ως «egrep» ή «fgrep» έχει καταργηθεί.\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "αποτυχία του lseek"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "Το ΠΡΟΤΥΠΟ είναι μια εκτεταμένη κανονική έκφραση (ΕΚΕ).\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr ""
+#~ "Η επίκληση ως «egrep» έχει καταργηθεί· χρησιμοποιήστε το «grep -E».\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr ""
+#~ "Η επίκληση ως «fgrep» έχει καταργηθεί· χρησιμοποιήστε το «grep -F».\n"
+
+#~ msgid "the --mmap option has been a no-op since 2010"
+#~ msgstr "η επιλογή --mmap δεν λειτουργεί από το 2010"
diff --git a/src/grep/po/en@boldquot.header b/src/grep/po/en@boldquot.header
new file mode 100644
index 0000000..fedb6a0
--- /dev/null
+++ b/src/grep/po/en@boldquot.header
@@ -0,0 +1,25 @@
+# All this catalog "translates" are quotation characters.
+# The msgids must be ASCII and therefore cannot contain real quotation
+# characters, only substitutes like grave accent (0x60), apostrophe (0x27)
+# and double quote (0x22). These substitutes look strange; see
+# http://www.cl.cam.ac.uk/~mgk25/ucs/quotes.html
+#
+# This catalog translates grave accent (0x60) and apostrophe (0x27) to
+# left single quotation mark (U+2018) and right single quotation mark (U+2019).
+# It also translates pairs of apostrophe (0x27) to
+# left single quotation mark (U+2018) and right single quotation mark (U+2019)
+# and pairs of quotation mark (0x22) to
+# left double quotation mark (U+201C) and right double quotation mark (U+201D).
+#
+# When output to an UTF-8 terminal, the quotation characters appear perfectly.
+# When output to an ISO-8859-1 terminal, the single quotation marks are
+# transliterated to apostrophes (by iconv in glibc 2.2 or newer) or to
+# grave/acute accent (by libiconv), and the double quotation marks are
+# transliterated to 0x22.
+# When output to an ASCII terminal, the single quotation marks are
+# transliterated to apostrophes, and the double quotation marks are
+# transliterated to 0x22.
+#
+# This catalog furthermore displays the text between the quotation marks in
+# bold face, assuming the VT100/XTerm escape sequences.
+#
diff --git a/src/grep/po/en@quot.header b/src/grep/po/en@quot.header
new file mode 100644
index 0000000..a9647fc
--- /dev/null
+++ b/src/grep/po/en@quot.header
@@ -0,0 +1,22 @@
+# All this catalog "translates" are quotation characters.
+# The msgids must be ASCII and therefore cannot contain real quotation
+# characters, only substitutes like grave accent (0x60), apostrophe (0x27)
+# and double quote (0x22). These substitutes look strange; see
+# http://www.cl.cam.ac.uk/~mgk25/ucs/quotes.html
+#
+# This catalog translates grave accent (0x60) and apostrophe (0x27) to
+# left single quotation mark (U+2018) and right single quotation mark (U+2019).
+# It also translates pairs of apostrophe (0x27) to
+# left single quotation mark (U+2018) and right single quotation mark (U+2019)
+# and pairs of quotation mark (0x22) to
+# left double quotation mark (U+201C) and right double quotation mark (U+201D).
+#
+# When output to an UTF-8 terminal, the quotation characters appear perfectly.
+# When output to an ISO-8859-1 terminal, the single quotation marks are
+# transliterated to apostrophes (by iconv in glibc 2.2 or newer) or to
+# grave/acute accent (by libiconv), and the double quotation marks are
+# transliterated to 0x22.
+# When output to an ASCII terminal, the single quotation marks are
+# transliterated to apostrophes, and the double quotation marks are
+# transliterated to 0x22.
+#
diff --git a/src/grep/po/eo.gmo b/src/grep/po/eo.gmo
new file mode 100644
index 0000000..eafe051
--- /dev/null
+++ b/src/grep/po/eo.gmo
diff --git a/src/grep/po/eo.po b/src/grep/po/eo.po
new file mode 100644
index 0000000..c093a15
--- /dev/null
+++ b/src/grep/po/eo.po
@@ -0,0 +1,952 @@
+# Esperanto translations for GNU grep.
+# Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2013, 2014, 2015, 2016, 2018, 2020, 2021 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+#
+# “Jeder ist seines Glückes Schmied,
+# aber nicht jeder ist ein guter Schmied.”
+#
+# D. Dale Gulledge <dsplat@rochester.rr.com>, 1999.
+# Edmund GRIMLEY EVANS <edmundo@rano.org>, 2000-2009.
+# Benno Schulenberg <benno@vertaalt.nl>, 2013, 2014, 2015, 2016, 2018, 2020.
+# Felipe CASTRO <fefcas@gmail.com>, 2021.
+msgid ""
+msgstr ""
+"Project-Id-Version: GNU grep 3.6.27\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-08-10 21:36-0300\n"
+"Last-Translator: Felipe Castro <fefcas@gmail.com>\n"
+"Language-Team: Esperanto <translation-team-eo@lists.sourceforge.net>\n"
+"Language: eo\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"Plural-Forms: nplurals=2; plural=n != 1;\n"
+"X-Generator: Poedit 2.4.2\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "nevalida argumento %s por %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "ambigua argumento %s por %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Validaj argumentoj estas:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "programeraro"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "staktroo"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "skrib-eraro"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "senpara ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "nevalida signoklaso"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "sintakso de signoklaso estas ekzemple [[:spaco:]], ne [:spaco:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "nefinita \\-eskapo"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "nevalida enhavo de \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "regulesprimo tro grandas"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "senpara ("
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "neniu sintakso indikatas"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "senpara )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Nekonata sistemeraro"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: opcio «%s%s» estas ambigua\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: opcio «%s%s» estas ambigua; eblaĵoj estas:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: nekonata opcio «%s%s»\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: opcio «%s%s» ne toleras argumenton\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: opcio «%s%s» bezonas argumenton\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: nevalida opcio -- «%c»\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: opcio bezonas argumenton -- «%c»\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "mankas sufiĉa memoro"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "ne eblas registri aktualan labordosierujon"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "malsukcesis reveni al komenca labordosierujo"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "malsukcesis agordi tekstan/duuman moduson de dosierpriaĵo"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "«"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "»"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Sukceso"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Neniu trafo"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Nevalida regulesprimo"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Nevalida kunmetita signo"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Nevalida nomo de signoklaso"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Malsuprenstreko '\\' ĉe la fino"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Nevalida retroreferenco"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Senpara [, [^, [:, [., aŭ [="
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "Senpara ( aŭ \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "Senpara \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Nevalida enhavo de \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Nevalida fino de gamo"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Mankas sufiĉa memoro"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Nevalida antaŭa regulesprimo"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Neatendita fino de regulesprimo"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Regulesprimo tro grandas"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "Senpara ) aŭ \\)"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Mankas antaŭa regulesprimo"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Pakigita far %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Pakigita far %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Ĉi tiu estas libera programaro: vi rajtas ĝin ŝanĝi kaj redistribui.\n"
+"La ĝusta permesilo estas GPLv3+: GNU GPL versio 3 aŭ sekva;\n"
+"por la kompleta (angla) teksto vidu <%s>.\n"
+"Ĉi tiu programaro ne garantiatas, ene de la limoj de la leĝo.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Verkita de %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Verkita de %s kaj %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Verkita de %s, %s kaj %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Verkita de %s, %s, %s\n"
+"kaj %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Verkita de %s, %s, %s,\n"
+"%s kaj %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Verkita de %s, %s, %s,\n"
+"%s, %s kaj %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Verkita de %s, %s, %s,\n"
+"%s, %s, %s kaj %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Verkita de %s, %s, %s,\n"
+"%s, %s, %s, %s\n"
+"kaj %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Verkita de %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s kaj %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Verkita de %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s kaj aliaj.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"Raportu programmisojn al <%s>;\n"
+"sciigu tradukerarojn al <translation-team-eo@lists.sourceforge.net>.\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Raportu programmisojn en %s al: <%s>\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Hejmpaĝo de «%s»: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Ĝenerala helpo por uzi GNU-programojn: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(ĉefenigujo)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "nevalida kuntekstlongeca argumento"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "enigo tro longas por nombri"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: duuma dosiero kongruas"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: averto: rikura ciklo de dosierujoj"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: eniga dosiero estas ankaŭ la eliga dosiero"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Uzmaniero:  %s [OPCIO...] ŜABLONOJ [DOSIERO...]\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Tajpu '%s --help' por pli da informoj.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Serĉas ŜABLONOJn en ĉiu DOSIERO.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Ekzemplo: %s -i 'hello world' menu.h main.c\n"
+"ŜABLONOJ povas esti pluraj ŝablonoj disigitaj per linifinoj.\n"
+"\n"
+"Elekto kaj interpreto de ŝablono:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     ŜABLONOJ estas etenditaj regulesprimoj\n"
+"  -F, --fixed-strings       ŜABLONOJ estas signoĉenoj\n"
+"  -G, --basic-regexp        ŜABLONOJ estas bazaj regulesprimoj  (defaŭlta)\n"
+"  -P, --perl-regexp         ŜABLONOJ estas regulesprimoj de Perl\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=ŜABLONOJ     uzi ŜABLONOJn kiel regulesprimojn\n"
+"  -f, --file=DOSIERO        akiri la ŝablonojn el DOSIERO\n"
+"  -i, --ignore-case         ignori diferencojn de uskleco, ŝablone kaj "
+"datene\n"
+"      --no-ignore-case      ne ignori diferencojn de uskleco  (defaŭlta)\n"
+"  -w, --word-regexp         kongrui nur kun tutaj vortoj\n"
+"  -x, --line-regexp         kongrui nur kun tutaj linioj\n"
+"  -z, --null-data           datenlinio finiĝas per bitoko 0, ne per "
+"linifino\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Diversaj:\n"
+"  -s, --no-messages         subpremi erarmesaĝojn\n"
+"  -v, --invert-match        elekti la nekongruajn liniojn\n"
+"  -V, --version             montri programversion kaj eliri\n"
+"      --help                montri ĉi tiun helpon kaj eliri\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Regado de la eligo:\n"
+"  -m, --max-count==NOMBRO   halti post NOMBRO da elektitaj linioj\n"
+"  -b, --byte-offset         montri la bitoknumeron kun eligataj linioj\n"
+"  -n, --line-number         montri la lininumeron kun eligataj linioj\n"
+"      --line-buffered       peli la eligon post ĉiu linio\n"
+"  -H, --with-filename       montri la dosiernomon antaŭ eligataj linioj\n"
+"  -h, --no-filename         subpremi la prefiksan dosiernomon ĉe eligo\n"
+"      --label=ETIKEDO       uzi ETIKEDOn kiel dosiernomon de ĉefenigujo\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       montri nur nevakajn kongruajn linipartojn\n"
+"  -q, --quiet, --silent     subpremi ĉian normalan eligadon\n"
+"      --binary-files=SPECO  supozi ke duumaj dosieroj estas de SPECO;\n"
+"                              SPECO estus 'binary' (duuma), "
+"'text' (teksta),\n"
+"                              aŭ 'without-match' (sen-trafa)\n"
+"  -a, --text                egalas al «--binary-files=text»\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        egalas al «--binary-files=without-match»\n"
+"  -d, --directories=AGO     kiel trakti dosierujojn; AGO estus "
+"'read' (legi),\n"
+"                              'recurse' (rikure), aŭ 'skip' (ignori)\n"
+"  -D, --devices=AGO         kiel trakti specialajn dosierojn;\n"
+"                              AGO estus 'read' (legi), aŭ 'skip' (ignori)\n"
+"  -R, -r, --recursive       egalas al «--directories=recurse»\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=ŜABLONO     ekzameni nur dosierojn kiuj kongruas kun "
+"ŜABLONO\n"
+"                              (dosiernomŝablonoj estas \"globbing\" "
+"ŝablonoj)\n"
+"      --exclude=ŜABLONO     ignori dosierojn kiuj kongruas kun ŜABLONO\n"
+"      --exclude-from=DSRO   ignori dosierojn kiuj kongruas kun ŝablono en "
+"DSRO\n"
+"      --exclude-dir=ŜABLONO ignori dosierujojn kiuj kongruas kun ŜABLONO\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match montri nur nomojn de dosieroj sen trafo\n"
+"  -l, --files-with-matches  montri nur nomojn de dosieroj kun trafoj\n"
+"  -c, --count               montri nur la nombron de kongruaj linioj\n"
+"                              en ĉiu dosiero\n"
+"  -T, --initial-tab         rektigi la TAB-signojn (se necesas)\n"
+"  -Z, --null                eligi la bitokon «0» post dosiernomo\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Regado de la kunteksto:\n"
+"  -B, --before-context=NOM  montri NOM liniojn da antaŭa kunteksto\n"
+"  -A, --after-context=NOM   montri NOM liniojn da posta kunteksto\n"
+"  -C, --context=NOMBRO      egalas al «-A NOMBRO -B NOMBRO»\n"
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NOMBRO                   egalas al «--context=NOMBRO»\n"
+"      --group-separator=APT  montri APT en linio inter kongruoj kun "
+"kunteksto\n"
+"      --no-group-separator  ne montri apartigilon por kongruoj kun "
+"kunteksto\n"
+"      --color[=KIAM],\n"
+"      --colour[=KIAM]       uzi markilojn por distingi la kongruajn ĉenojn;\n"
+"                              KIAM estu 'always' (ĉiam), 'never' (neniam),\n"
+"                              aŭ 'auto'\n"
+"  -U, --binary              ne forigi \\r-signojn ĉe linifino (MSDOS/"
+"Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Kiam DOSIERO estas «-», ĉefenigujo legiĝas.\n"
+"Kiam DOSIERO mankas, «.» legiĝas se rikura, alie «-» legiĝas.\n"
+"Kiam malpli ol du DOSIEROj indikatas, «-h» supoziĝas.\n"
+"Elirstato estas 0 se iu linio elektiĝis, alie 1;\n"
+"se iu eraro okazis kaj «-q» ne indikatis, elirstato estas 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "pluraj esprimtipoj indikatas"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"Perla kongruo ne funkcias ĉar ĉi tiu programo kompiliĝis kun «--disable-perl-"
+"regexp»"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "nevalida esprimtipo %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "nekonata ago por aparatoj"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr "averto: --unix-byte-offsets (-u) malaktualas"
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "nevalida maksimuma nombro"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "nekonata ago por duumaj dosieroj"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Verkita de Majk HERTEL (Mike Haertel) kaj aliuloj; vidu\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "mankas sufiĉa memoro por la PCRE-JIT-stako"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "opcio «-P» subtenas nur unubajtajn kaj UTF-8-ajn lokaĵojn"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "opcio «-P» akceptas nur unuopan ŝablonon"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "**interna eraro** (devus neniam okazi)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "transpasiĝis linilongecan limon de PCRE"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: mankas sufiĉa memoro"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: la PCRE-JIT-stako tute pleniĝis"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: transpasiĝis retroreferencan limon de PCRE"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: transpasiĝis rikuran limon de PCRE"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: interna eraro en PCRE: %d"
+
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr "averto: GREP_OPTIONS evitindas; bonvolu uzi 'alias' aŭ skripton"
+
+#~ msgid "warning: %s: %s"
+#~ msgstr "averto: %s: %s"
+
+#~ msgid "%s home page: <http://www.gnu.org/software/%s/>\n"
+#~ msgstr "Hejmpaĝo de «%s»: http://www.gnu.org/software/%s/\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "nevalida argumento de %s%s: «%s»"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "nevalida sufikso en argumento de %s%s: «%s»"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "argumento de %s%s tro grandas: «%s»"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: opcio «--%s» ne toleras argumenton\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: nekonata opcio «--%s»\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: opcio «-W %s» estas plursenca\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: opcio «-W %s» ne toleras argumenton\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: opcio «-W %s» bezonas argumenton\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "malsukcesis 'lseek'"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "ŜABLONO defaŭlte estas baza regulesprimo (BRE).\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "Rekta alvoko kiel aŭ 'egrep' aŭ 'fgrep' malrekomendatas;\n"
+#~ "'egrep' signifas 'grep -E; 'fgrep' signifas 'grep -F'.\n"
+
+#~ msgid "unescaped ^ or $ not supported with -Pz"
+#~ msgstr "seneskapa ^ aŭ $ ne subtenatas kun opcio «-Pz»"
+
+#~ msgid "invalid UTF-8 byte sequence in input"
+#~ msgstr "nevalida UTF-8-a bajtsekvenco en enigo"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "ŜABLONO estas etendita regulesprimo (ERE).\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr "Alvoko kiel 'egrep' malrekomendatas; uzu 'grep -E' anstataŭe.\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr "ŜABLONO estas aro da fiksitaj signoĉenoj en apartaj linioj.\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr "Alvoko kiel 'fgrep' malrekomendatas; uzu 'grep -F' anstataŭe.\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s nur povas uzi sintakson de %s-ŝablono"
+
+#~ msgid "the --mmap option has been a no-op since 2010"
+#~ msgstr "la opcio «--mmap» faras nenion, jam ekde 2010"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "nefinita ripetonombro"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "misformita ripetonombro"
+
+#~ msgid "writing output"
+#~ msgstr "skribiĝas eligo"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE;\n"
+#~ "                            TYPE is `binary', `text', or `without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories;\n"
+#~ "                            ACTION is `read', `recurse', or `skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+#~ "                            ACTION is `read' or `skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=FILE_PATTERN  search only files that match FILE_PATTERN\n"
+#~ "      --exclude=FILE_PATTERN  skip files and directories matching "
+#~ "FILE_PATTERN\n"
+#~ "      --exclude-from=FILE   skip files matching any file pattern from "
+#~ "FILE\n"
+#~ "      --exclude-dir=PATTERN directories that match PATTERN will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match print only names of FILEs containing no "
+#~ "match\n"
+#~ "  -l, --files-with-matches  print only names of FILEs containing matches\n"
+#~ "  -c, --count               print only a count of matching lines per "
+#~ "FILE\n"
+#~ "  -T, --initial-tab         make tabs line up (if needed)\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Regado de la eligo:\n"
+#~ "  -m, --max-count==NOMBRO   halti post NOMBRO da trafoj\n"
+#~ "  -b, --byte-offset         presi la bitoknumeron kun eligataj linioj\n"
+#~ "  -n, --line-number         presi la lininumeron kun eligataj linioj\n"
+#~ "      --line-buffered       peli la eligon post ĉiu linio\n"
+#~ "  -H, --with-filename       presi la dosiernomon por ĉiu trafo\n"
+#~ "  -h, --no-filename         subpremi la prefiksan dosiernomon ĉe eligo\n"
+#~ "      --label=ETIKEDO       presi ETIKEDOn kiel dosiernomon de normala "
+#~ "enigo\n"
+#~ "  -o, --only-matching       montri nur la liniparton, kiu kongruas kun "
+#~ "ŜABLONO\n"
+#~ "  -q, --quiet, --silent     subpremi ĉian normalan eligadon\n"
+#~ "      --binary-files=SPECO  supozi, ke binaraj dosieroj estas de SPECO\n"
+#~ "                            SPECO estas 'binary', 'text', aŭ 'without-"
+#~ "match'\n"
+#~ "  -a, --text                same kiel --binary-files=text\n"
+#~ "  -I                        same kiel --binary-files=without-match\n"
+#~ "  -d, --directories=AGO     kiel trakti dosierujojn; AGO estas "
+#~ "'read' (legi),\n"
+#~ "                            'recurse' (rekurse), aŭ 'skip' (ignori)\n"
+#~ "  -D, --devices=AGO         kiel trakti specialajn dosierojn;\n"
+#~ "                            AGO estas 'read' (legi), aŭ 'skip' (ignori)\n"
+#~ "  -R, -r, --recursive       same kiel --directories=recurse.\n"
+#~ "      --include=ŜABLONO     ekzameni nur dosierojn, kiuj kongruas kun "
+#~ "ŜABLONO\n"
+#~ "      --exclude=ŜABLONO     ignori dosier(uj)ojn, kiuj kongruas kun "
+#~ "ŜABLONO\n"
+#~ "      --exclude-from=DOS    ignori dosierojn, kiuj kongruas kun ŝablono "
+#~ "en DOS\n"
+#~ "      --exclude-dir=ŜABLONO ignori dosierujojn, kiuj kongruas kun "
+#~ "ŜABLONO\n"
+#~ "  -L, --files-without-match presi nur dosiernomojn sen trafo\n"
+#~ "  -l, --files-with-matches  presi nur dosiernomojn kun trafoj\n"
+#~ "  -c, --count               presi nur nombron de kongruaj linioj en ĉiu "
+#~ "dosiero\n"
+#~ "  -T, --initial-tab         rektigi la TAB-signojn (se necese)\n"
+#~ "  -Z, --null                presi la bitokon 0 post dosiernomo\n"
+
+#~ msgid ""
+#~ "In GREP_COLORS=\"%s\", the \"%s\" capacity needs a value (\"=...\"); "
+#~ "skipped."
+#~ msgstr "En GREP_COLORS=\"%s\", \"%s\" bezonas valoron (\"=...\"); ignorite."
+
+#~ msgid ""
+#~ "In GREP_COLORS=\"%s\", the \"%s\" capacity is boolean and cannot take a "
+#~ "value (\"=%s\"); skipped."
+#~ msgstr ""
+#~ "En GREP_COLORS=\"%s\", \"%s\" estas bulea kaj ne povas alpreni valoron "
+#~ "(\"=%s\"); ignorite."
+
+#~ msgid "In GREP_COLORS=\"%s\", the \"%s\" capacity %s."
+#~ msgstr "En GREP_COLORS=\"%s\", \"%s\" %s."
+
+#~ msgid ""
+#~ "Stopped processing of ill-formed GREP_COLORS=\"%s\" at remaining "
+#~ "substring \"%s\"."
+#~ msgstr ""
+#~ "Ĉesis pritrakti malbone formitan GREP_COLORS=\"%s\" ĉe restanta subĉeno "
+#~ "\"%s\"."
+
+#~ msgid "unknown directories method"
+#~ msgstr "nekonata dosieruja metodo"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "Ne eblas kombini la opciojn -P kaj -z"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: malpermesata opcio -- %c\n"
+
+#~ msgid "Copyright (C) 2008 Free Software Foundation, Inc.\n"
+#~ msgstr "Kopirajto (C) 2008  Free Software Foundation, Inc.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions.  There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "Ĉi tiu estas libera programo; vidu la fonton por kopikondiĉoj. Estas\n"
+#~ "NENIA GARANTIO, eĉ ne pri KOMERCA KVALITO aŭ ADEKVATECO POR DIFINITA "
+#~ "CELO.\n"
diff --git a/src/grep/po/es.gmo b/src/grep/po/es.gmo
new file mode 100644
index 0000000..2aafb9b
--- /dev/null
+++ b/src/grep/po/es.gmo
diff --git a/src/grep/po/es.po b/src/grep/po/es.po
new file mode 100644
index 0000000..6df416f
--- /dev/null
+++ b/src/grep/po/es.po
@@ -0,0 +1,951 @@
+# Mensajes en español para GNU grep.
+# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2010, 2011, 2013, 2014 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Enrique Melero Gómez <melero@eurolands.com>, 1996.
+# Santiago Vila Doncel <sanvila@unex.es>, 1997-2002, 2010, 2011, 2013, 2014.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: GNU grep 2.19.12\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2014-07-11 18:53+0200\n"
+"Last-Translator: Santiago Vila Doncel <sanvila@unex.es>\n"
+"Language-Team: Spanish <es@tp.org.es>\n"
+"Language: es\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8-bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "argumento %s inválido %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "argumento %s ambiguo para %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Los argumentos válidos son:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr ""
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr ""
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "error de escritura"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "[ desemparejado"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "clase de caracteres inválida"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "la sintaxis de la clase de caracteres es [[:space:]], no [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "secuencia de escape \\ sin terminar"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "contenido inválido de \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "la expresión regular es demasiado grande"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "( desemparejado"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "no se ha especificado ninguna sintaxis"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr ") desemparejado"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Error del sistema desconocido"
+
+#: lib/getopt.c:278
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: la opción '-W %s' es ambigua\n"
+
+#: lib/getopt.c:284
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: la opción '%s' es ambigua; posibilidades:"
+
+#: lib/getopt.c:319
+#, fuzzy, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: opción no reconocida '%c%s'\n"
+
+#: lib/getopt.c:345
+#, fuzzy, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: la opción '%c%s' no admite ningún argumento\n"
+
+#: lib/getopt.c:360
+#, fuzzy, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: la opción '--%s' requiere un argumento\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: opción inválida -- '%c'\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: la opción requiere un argumento -- '%c'\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "memoria agotada"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "no se puede registrar el directorio de trabajo actual"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "fallo al volver al directorio de trabajo inicial"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr ""
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "«"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "»"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Éxito"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "No hay ninguna coincidencia"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Expresión regular inválida"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Carácter de unión inválido"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Nombre de clase de caracteres inválido"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Barra invertida al final"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Referencia hacia atrás inválida"
+
+#: lib/regcomp.c:156
+#, fuzzy
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "[ o [^ desemparejado"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "( o \\( desemparejado"
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "\\{ desemparejado"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Contenido inválido de \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Final de rango inválido"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Memoria agotada"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "La expresión regular precedente es inválida"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Final prematuro de la expresión regular"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "La expresión regular es demasiado grande"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ") o \\) desemparejado"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "No hay ninguna expresión regular anterior"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Empaquetado por %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Empaquetado por %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "(C)"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, fuzzy, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"\n"
+"Licencia GPLv3+: GPL de GNU versión 3 o posterior\n"
+"<http://gnu.org/licenses/gpl.html>\n"
+"Esto es software libre: usted es libre de cambiarlo y redistribuirlo.\n"
+"No hay NINGUNA GARANTÍA, hasta donde permite la ley.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Escrito por %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Escrito por %s y %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Escrito por %s, %s, y %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"y %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, y %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, y %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, %s, y %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"y %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, y %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, y otros.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, fuzzy, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"\n"
+"Comunicar errores en el programa a: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Comunicar errores sobre %s a: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Página inicial de %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, fuzzy, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr ""
+"Ayuda general sobre el uso de software de GNU: <http://www.gnu.org/gethelp/"
+">\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(entrada estándar)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "longitud de contexto inválida"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "la entrada es demasiado grande para contar"
+
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "Coincidencia en el fichero binario %s\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "bucle de directorio recursivo"
+
+#: src/grep.c:1899
+#, fuzzy, c-format
+msgid "%s: input file is also the output"
+msgstr "el fichero de entrada %s también es el de salida"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, fuzzy, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Modo de empleo: %s [OPCIÓN]... PATRÓN [FICHERO]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Pruebe '%s --help' para más información.\n"
+
+#: src/grep.c:1969
+#, fuzzy, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Busca PATRÓN en cada FICHERO o en la entrada estándar.\n"
+
+#: src/grep.c:1970
+#, fuzzy, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Ejemplo: %s -i 'hello world' menu.h main.c\n"
+"\n"
+"Selección e interpretación de Expreg:\n"
+
+#: src/grep.c:1975
+#, fuzzy, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     PATRÓN es una expresión regular extendida (ERE)\n"
+"  -F, --fixed-strings       PATRÓN es un conjunto de cadenas separadas por\n"
+"                            caracteres de nueva línea\n"
+"  -G, --basic-regexp        PATRÓN es una expresión regular básica (BRE)\n"
+"  -P, --perl-regexp         PATRÓN es una expresión regular en Perl\n"
+
+#: src/grep.c:1981
+#, fuzzy, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=PATRÓN       utiliza PATRÓN como expresión regular\n"
+"  -f, --file=FICHERO        obtiene PATRÓN de FICHERO\n"
+"  -i, --ignore-case         considera iguales mayúsculas y minúsculas\n"
+"  -w, --word-regexp         obliga a que PATRÓN coincida solamente\n"
+"                            con palabras completas\n"
+"  -x, --line-regexp         obliga a que PATRÓN coincida solamente\n"
+"                            con líneas completas\n"
+"  -z, --null-data           una línea de datos termina en un byte 0, no\n"
+"                            en un carácter de nueva línea\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Variadas:\n"
+"  -s, --no-messages         suprime los mensajes de error\n"
+"  -v, --invert-match        selecciona las líneas que no coinciden\n"
+"  -V, --version             muestra la versión y finaliza\n"
+"      --help                muestra este texto de ayuda y finaliza\n"
+
+#: src/grep.c:1996
+#, fuzzy, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Control del resultado:\n"
+"  -m, --max-count=NÚM       se detiene después de NÚM coincidencias\n"
+"  -b, --byte-offset         muestra el desplazamiento en bytes junto\n"
+"                            con las líneas de salida\n"
+"  -n, --line-number         muestra el número de línea junto con\n"
+"                            las líneas de salida\n"
+"      --line-buffered       descarga el resultado para cada línea\n"
+"  -H, --with-filename       muestra el nombre del fichero para cada\n"
+"                            coincidencia\n"
+"  -h, --no-filename         suprime los nombres de los ficheros como "
+"prefijo\n"
+"                            en el resultado\n"
+"      --label=ETIQUETA      utiliza ETIQUETA como nombre de fichero prefijo\n"
+"                            para la entrada estándar\n"
+
+#: src/grep.c:2007
+#, fuzzy, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       muestra solamente la parte de una línea que\n"
+"                            encaja con PATRÓN\n"
+"  -q, --quiet, --silent     suprime todo el resultado normal\n"
+"      --binary-files=TIPO   supone que los ficheros binarios son TIPO\n"
+"                            TIPO es 'binary', 'text', o 'without-match'\n"
+"  -a, --text                equivalente a --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        equivalente a --binary-files=without-match\n"
+"  -d, --directories=ACCIÓN  especifica cómo manejar los directorios\n"
+"                            ACCIÓN es 'read', 'recurse', o 'skip'\n"
+"  -D, --devices=ACCIÓN      especifica cómo manejar dispositivos, FIFOs y\n"
+"                            `sockets', puede ser 'read' o 'skip'\n"
+"  -r, --recursive           equivalente a --directories=recurse\n"
+"  -R, --dereference-recursive  similar, pero sigue todos los enlaces "
+"simbólicos\n"
+
+#: src/grep.c:2023
+#, fuzzy, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=PATRÓN      examina los ficheros que encajan con PATRÓN\n"
+"      --exclude=PATRÓN      se salta los ficheros que encajan con PATRÓN\n"
+"      --exclude-from=FICHERO se salta los ficheros que encajan con los "
+"patrones\n"
+"                             de FICHERO\n"
+"      --exclude-dir=PATRÓN  se salta los directorios que encajan con PATRÓN\n"
+
+#: src/grep.c:2030
+#, fuzzy, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match muestra solamente los nombres de FICHEROs\n"
+"                            que no contienen ninguna coincidencia\n"
+"  -l, --files-with-matches  muestra solamente los nombres de FICHEROs\n"
+"                            que contienen alguna coincidencia\n"
+"  -c, --count               muestra solamente el total de líneas que "
+"coinciden\n"
+"                            por cada FICHERO\n"
+"  -Z, --null                imprime un byte 0 después del nombre del "
+"FICHERO\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Control del contexto:\n"
+"  -B, --before-context=NÚM  muestra NÚM líneas de contexto anterior\n"
+"  -A, --after-context=NÚM   muestra NÚM líneas de contexto posterior\n"
+"  -C, --context=NÚM         muestra NÚM líneas de contexto\n"
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NÚM                      lo mismo que --context=NÚM\n"
+"      --color[=CUÁNDO],\n"
+"      --colour[=CUÁNDO]     distingue con marcadores la cadena que encaja\n"
+"                            CUÁNDO puede ser 'always', 'never' o 'auto'.\n"
+"  -U, --binary              no elimina los caracteres de retorno de carro\n"
+"                            finales de línea (MSDOS/Windows)\n"
+"  -u, --unix-byte-offsets   cuenta los desplazamientos como si no hubiera\n"
+"                            retornos de carro (MSDOS/Windows)\n"
+
+#: src/grep.c:2052
+#, fuzzy, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Cuando FICHERO es -, lee la entrada estándar.  Si no se especifica\n"
+"ningún FICHERO, lee . si se especifica -r en la línea de órdenes, o -\n"
+"en caso contrario.  Si se dan menos de dos FICHEROs, se supone -h. El\n"
+"estado de salida es 0 si hay coincidencias, 1 si no las hay; si ocurre\n"
+"algún error y no se especificó -q, el estado de salida es 2.\n"
+
+#  viendo los fuentes , hay varias opciones
+#  que hay sin documentar. O quizá es que getopt() lo he entendido mal
+#  Son las opciones X ( requiere argumento ) , switchs  -c, -b, -L e -y
+#  grep.c:622 ->
+#  opt = getopt(argc, argv, "0123456789A:B:CEFGVX:bce:f:hiLlnqsvwxy"
+#  grep --help ->
+#  usage: grep [-[[AB] ]<num>] [-[CEFGVchilnqsvwx]] [-[ef]] <expr> [<files...>]
+#  La opción -X es a la que corresponde esta línea.
+#
+# No me gusta nada lo de opción "a buscar".
+# Se admiten sugerencias. sv
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "se han especificado expresiones conflictivas"
+
+#: src/grep.c:2101
+#, fuzzy
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"el soporte para la opción -P no está compilado en este ejecutable --disable-"
+"perl-regexp"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "expresión inválida %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "método de dispositivos desconocido"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "contador máximo inválido"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "tipo binary-files desconocido"
+
+#: src/grep.c:2829
+#, fuzzy
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr "otros, véase <http://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>"
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "fallo al asignar memoria para la pila JIT de PCRE"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr ""
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "la opción -P solamente admite un patrón"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "error interno (no debería ocurrir nunca)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "se ha excedido el límite de longitud de línea de las PCREs"
+
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "memoria agotada"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:315
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "se ha excedido el límite de vuelta atrás de las PCREs"
+
+#: src/pcresearch.c:319
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "se ha excedido el límite de vuelta atrás de las PCREs"
+
+#: src/pcresearch.c:327
+#, fuzzy, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "error interno de PCRE: %d"
+
+#, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "atención: %s: %s"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "argumento %s%s inválido '%s'"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "sufijo inválido en el argumento %s%s '%s'"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "%s%s argumento '%s' demasiado grande"
+
+#, fuzzy
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "página inicial de %s: <http://www.gnu.org/software/%s/>\n"
+
+#~ msgid "internal error"
+#~ msgstr "error interno"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: la opción '--%s' no admite ningún argumento\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: opción no reconocida '--%s'\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: la opción '-W %s' es ambigua\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: la opción '-W %s' no admite ningún argumento\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: la opción '-W %s' requiere un argumento\n"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "PATRÓN es, por omisión, una expresión regular básica (BRE).\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "'egrep' significa 'grep -E'.  'fgrep' significa 'grep -F'.\n"
+#~ "La invocación directa como 'egrep' o 'fgrep' está obsoleta.\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "falló la llamada al sistema `lskeek'"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "Página inicial de GNU grep: <%s>\n"
+
+#~ msgid "invalid UTF-8 byte sequence in input"
+#~ msgstr "secuencia de bytes UTF-8 inválida en la entrada"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "PATRÓN es una expresión regular extendida (ERE).\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr ""
+#~ "La invocación como 'egrep' está obsoleta; utilice 'grep -E' en su lugar.\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr "PATRÓN es un conjunto de cadenas fijas separadas por nueva línea\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr ""
+#~ "La invocación como 'fgrep' está obsoleta; utilice 'grep -F' en su lugar.\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s solamente puede usar la sintaxis de patrón %s"
+
+#~ msgid "the --mmap option has been a no-op since 2010"
+#~ msgstr "la opcion --mmap no hace nada desde 2010"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "contador de repetición sin terminar"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "contador de repetición erróneo"
+
+#~ msgid "writing output"
+#~ msgstr "escribiendo el resultado"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity needs a value (\"=...\"); "
+#~ "skipped"
+#~ msgstr ""
+#~ "en GREP_COLORS=\"%s\", la capacidad \"%s\" necesita un valor (\"=...\"); "
+#~ "saltado."
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity is boolean and cannot take a "
+#~ "value (\"=%s\"); skipped"
+#~ msgstr ""
+#~ "en GREP_COLORS=\"%s\", la capacidad \"%s\" es booleana y no puede tener "
+#~ "un valor (\"=%s\"); saltado."
+
+#~ msgid "in GREP_COLORS=\"%s\", the \"%s\" capacity %s"
+#~ msgstr "en GREP_COLORS=\"%s\", la capacidad \"%s\" %s."
+
+#~ msgid ""
+#~ "stopped processing of ill-formed GREP_COLORS=\"%s\" at remaining "
+#~ "substring \"%s\""
+#~ msgstr ""
+#~ "el proceso del erróneo GREP_COLORS=\"%s\" se detuvo en la subcadena \"%s"
+#~ "\"."
+
+# Nota: Se refiere a la opción --directories=ACCIÓN cuando ACCIÓN
+# no es `read', `recurse' o `skip'.
+#~ msgid "unknown directories method"
+#~ msgstr "método de directorios desconocido"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions.  There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "Esto es software libre; vea el código fuente para las condiciones de "
+#~ "copia.\n"
+#~ "No hay NINGUNA garantía; ni siquiera de COMERCIABILIDAD o IDONEIDAD PARA "
+#~ "UN\n"
+#~ "FIN DETERMINADO.\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "Las opciones -P y -z no se pueden combinar"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: opción ilegal -- %c\n"
+
+# FIXME. Comunicar al autor que esto es repetición...
+#~ msgid "out of memory"
+#~ msgstr "memoria agotada"
+
+# FIXME: Dice [FILE] ... en vez de [FILE]... ¿Será un error?
+#~ msgid "Usage: %s [OPTION]... PATTERN [FILE] ...\n"
+#~ msgstr "Modo de empleo: %s [OPCIÓN]... PATRÓN [FICHERO] ...\n"
+
+#~ msgid "%s (GNU grep) %s\n"
+#~ msgstr "%s (GNU grep) %s\n"
+
+#~ msgid "option %s"
+#~ msgstr "opción %s"
+
+#~ msgid " with arg %s"
+#~ msgstr " con argumento %s"
+
+#~ msgid "digits occur in two different argv-elements.\n"
+#~ msgstr "aparecen dígitos en dos elementos de argv diferentes.\n"
+
+#~ msgid "option %c\n"
+#~ msgstr "opción %c\n"
+
+#~ msgid "option a\n"
+#~ msgstr "opción a\n"
+
+#~ msgid "option b\n"
+#~ msgstr "opción b\n"
+
+#~ msgid "option c with value `%s'\n"
+#~ msgstr "la opción c tiene el valor `%s'\n"
+
+#~ msgid "option d with value `%s'\n"
+#~ msgstr "la opción d tiene el valor `%s'\n"
+
+#~ msgid "?? getopt returned character code 0%o ??\n"
+#~ msgstr "?? getopt ha devuelto el carácter código 0%o ??\n"
+
+#~ msgid "non-option ARGV-elements: "
+#~ msgstr "elementos de ARGV que no son opciones: "
+
+#~ msgid "you may specify only one of -E, -F, or -G"
+#~ msgstr "sólo se puede especificar una de las opciones -E, -F, o -G"
+
+# Prefiero dejarlo en solamente un patrón
+# Pero entonces no queda claro que *debe haber uno*, y parece que
+# es uno como máximo (siendo el mínimo 0). sv
+#~ msgid ""
+#~ "There should be one and only one PATTERN, `-e PATTERN' or `-f FILE'.\n"
+#~ msgstr "Debe haber un y solamente un PATRÓN, `-e PATRÓN', o `-f FICHERO'.\n"
+
+#~ msgid "If no -[GEF], then -G is assumed.\n"
+#~ msgstr "Si no se especifica ninguna de las opciones -[GEF], se supone -G.\n"
diff --git a/src/grep/po/et.gmo b/src/grep/po/et.gmo
new file mode 100644
index 0000000..14a7c9c
--- /dev/null
+++ b/src/grep/po/et.gmo
diff --git a/src/grep/po/et.po b/src/grep/po/et.po
new file mode 100644
index 0000000..1aa20b7
--- /dev/null
+++ b/src/grep/po/et.po
@@ -0,0 +1,735 @@
+# This file is distributed under the same license as the grep package.
+# Estonian translations for grep
+# Copyright (C) 2000 Free Software Foundation, Inc.
+# Toomas Soome <tsoome@me.com>, 2021.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 3.6.27\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-08-09 11:00+0300\n"
+"Last-Translator: Toomas Soome <tsoome@me.com>\n"
+"Language-Team: Estonian <linux-ee@lists.eenet.ee>\n"
+"Language: et\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8-bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "vigane argument %s võtmele %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "segane argument %s võtmele %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Lubatud argumendid on:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "programmi viga"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "pinu ületäitumine"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "viga kirjutamisel"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "balanseerimata ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "vigane sümboliklass"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "sümbolklassi süntaks on [[:space:]], mitte [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "lõpetamata \\ paojada"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "vigane \\{\\} sisu"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "regulaaravaldis on liiga suur"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "balanseerimata ("
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "süntaksit pole määratud"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "balanseerimata )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Tundmatu süsteemi viga"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: võti '%s%s' on segane\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: võti '%s%s' on segane; võimalused:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: tundmatu võti '%s%s'\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: võti '%s%s' ei luba argumenti\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: võti '%s%s' nõuab argumenti\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: vigane võti -- '%c'\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: võti nõuab argumenti -- '%c'\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "mälu on otsas"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "ei õnnestu salvestada jooksvat töökataloogi"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "algsesse töökataloogi ei saa tagasi minna"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "failipideme tekst/binaar moodi muutmine ebaõnnestus"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "`"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "'"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Edukas"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Vastet pole"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Vigane regulaaravaldis"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Vigane sortimise sümbol"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Vigane sümbolklassi nimi"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Lõpetav langkriips"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Vigane tagasi viide"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Puudub [, [^, [:, [. või [= paariline"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "Puudub ( või \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "Puudub \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Vigane \\{\\} sisu"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Vigane vahemiku lõpp"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Mälu on otsas"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Vigane eelnev regulaaravaldis"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Ootamatu reagulaaravaldise lõpp"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Regulaaravaldis on liiga suur"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "Puudub ) või \\)"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Eelnevat regulaaravaldist pole"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Pakendanud %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Pakendanud %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Litsents GPLv3+: GNU GPL versioon 3 või uuem <%s>\n"
+"See on vaba tarkvara: teil on lubatud seda muuta ja levitada.\n"
+"Garantii PUUDUB; vastavalt seadustega lubatud piiridele.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Kirjutanud %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Kirjutanud %s ja %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Kirjutanud %s, %s, ja %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Kirjutanud %s, %s, %s,\n"
+"ja %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Kirjutanud %s, %s, %s,\n"
+"%s, ja %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Kirjutanud %s, %s, %s,\n"
+"%s, %s, ja %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Kirjuatanud %s, %s, %s,\n"
+"%s, %s, %s, ja %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Kirjutanud %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"ja %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Kirjutanud %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, ja %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Kirjutanud %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, ja teised.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "Teatage palun vigadest: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Teatage palun %s vigadest: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "%s koduleht: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Üldine abiinfo GNU tarkvara kohta: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(standardsisend)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "vigane konteksti pikkuse argument"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "sisend on loendamiseks liiga suur"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: binaarfail sobib"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: hoiatus: rekursiivne kataloogipuu tsükkel"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: sisendfail on ühtlasi ka väljund"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Kasutamine: %s [VÕTI]... MUSTRID [FAIL] ...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Lisainfo saamiseks proovige võtit '%s --help'.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Otsi MUSTREID igast FAIList.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Näiteks: %s -i 'tere kõik' menu.h main.c\n"
+"MUSTRID võivad sisaldada mitut reavahetusega eraldatud mustrit.\n"
+"\n"
+"Mustri valik ja interpreteerimine:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     MUSTRID on laiendatud regulaaravaldised\n"
+"  -F, --fixed-strings       MUSTRID on hulk reavahetustega eraldatud "
+"sõnesid\n"
+"  -G, --basic-regexp        MUSTRID on lihtsad regulaaravaldised "
+"(vaikimisi)\n"
+"  -P, --perl-regexp         MUSTRID on Perl regulaaravaldised\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=MUSTER       kasuta regulaaravaldistena\n"
+"  -f, --file=FAIL           loe MUSTRID failist FAIL\n"
+"  -i, --ignore-case         tõstutundetu\n"
+"      --no-ignore-case      tõstutundlik (vaikimisi)\n"
+"  -w, --word-regexp         kasuta MUSTRIT sõnade leidmiseks\n"
+"  -x, --line-regexp         kasuta MUSTRIT ridade leidmiseks\n"
+"  -z, --null-data           andmerida lõppeb baidil 0, mitte reavahetusel\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Muud:\n"
+"  -s, --no-messages         blokeeri veateated\n"
+"  -v, --invert-match        vali mitte-sobivad read\n"
+"  -V, --version             esita versiooniinfo ja lõpeta töö\n"
+"      --help                esita see abiinfo ja lõpeta töö\n"
+"\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Väljundi kontroll:\n"
+"  -m, --max-count=NUM       peatu peale NUM rida\n"
+"  -b, --byte-offset         väljasta koos ridadega ka baidi indeks\n"
+"  -n, --line-number         väljasta koos ridadega ka reanumber\n"
+"      --line-buffered       tühjenda väljund igal real\n"
+"  -H, --with-filename       väljasta iga leiuga failinimi\n"
+"  -h, --no-filename         blokeeri väljundis failinimi\n"
+"      --label=MÄRGEND       kasuta väljundis failinime asemel märgendit\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       näita ainult mustriga sobivat mittetühja reaosa\n"
+"  -q, --quiet, --silent     blokeeri kogu tavaline väljund\n"
+"      --binary-files=TÜÜP   eelda binaarfailide tüüpi;\n"
+"                            TÜÜP on 'binary', 'text', või 'without-match'\n"
+"  -a, --text                sama, kui --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        sama, kui --binary-files=without-match\n"
+"  -d, --directories=TEGEVUS kuidas käsitleda katalooge;\n"
+"                            TEGEVUS on 'read', 'recurse' või 'skip'\n"
+"  -D, --devices=TEGEVUS     kuidas käsitleda seadmeid, FIFOsid ja "
+"pistikuid;\n"
+"                            TEGEVUS on 'read' või 'skip'\n"
+"  -r, --recursive           sama, kui --directories=recurse\n"
+"  -R                        sama, aga järgib kõiki nimeviiteid\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=FAILI_MUSTER  otsi alinult mustrile vastavaid faile\n"
+"      --exclude=FAILI_MUSTER  välista mustrile vastavad failid\n"
+"      --exclude-from=FAIL    välista failid vastavalt failist loetud "
+"mustrile\n"
+"      --exclude-dir=MUSTER   välista mustrile vastavad kataloogid.\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match  väljasta ainult failide nimed, mis ei sobinud\n"
+"  -l, --files-with-matches  väljasta ainult leitud failide nimed\n"
+"  -c, --count               väljasta ainult leitud ridade arv faili kohta\n"
+"  -T, --initial-tab         kasuta vajadusel ridade joondamisel "
+"tabulaatorit\n"
+"  -Z, --null                väljasta faili nime järel bait 0\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Konteksti kontroll:\n"
+"  -B, --before-context=NUM  väljasta NUM rida eelnevat konteksti\n"
+"  -A, --after-context=NUM   väljasta NUM rida järgnevat konteksti\n"
+"  -C, --context=NUM         väljasta NUM rida väljundi konteksti\n"
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NUM                      sama, kui --context=NUM\n"
+"      --group-separator=ER  väljasta ER kontekstiga leidude vahel\n"
+"      --no-group-separator  leidude eraldajat ei väljastata\n"
+"      --color[=MILLAL],\n"
+"      --colour[=MILLAL]     kasuta otsitava sõne eristamiseks markereid\n"
+"                            MILLAL võib olla 'always', 'never' või 'auto'.\n"
+"  -U, --binary              ära eemalda rea lõpust CR sümboleid (MSDOS/"
+"WINDOWS)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Kui fail on '-', loe standardsisendit. Kui faili ei antud ja kasutati võtit -"
+"r,\n"
+"loe '.', muidu '-'. Kui anti vähem kui kaks faili, eelda -h. \n"
+"Lõpetamise kood on 0, kui rida leiti, muidu 1;\n"
+"kui tekkis viga ja -q ei kasutatud, on lõpetamise kood 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "määrati konfliktsed otsijad"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"Perl regulaaravaldisi ei toetata --disable-perl-regexp kompileerimise võtmega"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "vigane sobitaja %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "tundmatu seadmete meetod"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr "hoiatus: --unix-byte-offsets (-u) on aegunud"
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "vigane maksimum"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "tundmatu kahendfailide tüüp"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Kirjutanud Mike Haertel ja teised; vaadake\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "PCRE JIT magasini jaoks ei jätku mälu"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P toetab ainult ühebaidilisi ja UTF-8 lokaate"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "võti -P toetab ainult ühte mustrit"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "sisemine viga (ei peaks kunagi juhtuma)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "PCRE rea pikkuse piirang on ületatud"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: mälu on otsas"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: PCRE JIT pinu sai täis"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: PCRE tagasivaate piirang on ületatud"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: PCRE rekursiooni piirang on ületatud"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: sisemine PCRE viga: %d"
diff --git a/src/grep/po/eu.gmo b/src/grep/po/eu.gmo
new file mode 100644
index 0000000..47fffd6
--- /dev/null
+++ b/src/grep/po/eu.gmo
diff --git a/src/grep/po/eu.po b/src/grep/po/eu.po
new file mode 100644
index 0000000..dd15a8a
--- /dev/null
+++ b/src/grep/po/eu.po
@@ -0,0 +1,831 @@
+# Basque translation of grep.
+# Copyright (C) 2004 Free Software Foundation, Inc.
+# Mikel Olasagasti <hey_neken@mundurat.net>, 2004, 2005.
+# , fuzzy
+#
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 2.5.1a\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2005-03-03 21:40+0100\n"
+"Last-Translator: Mikel Olasagasti <hey_neken@mundurat.net>\n"
+"Language-Team: Basque <translation-team-eu@lists.sourceforge.net>\n"
+"Language: eu\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"Plural-Forms: nplurals=2; plural=(n == 1)\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr ""
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr ""
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr ""
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr ""
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr ""
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr ""
+
+#: lib/dfa.c:896
+#, fuzzy
+msgid "unbalanced ["
+msgstr "Parekatu gabeko ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr ""
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr ""
+
+#: lib/dfa.c:1210
+#, fuzzy
+msgid "unfinished \\ escape"
+msgstr "Amaitu gabeko \\ eskapea"
+
+#: lib/dfa.c:1371
+#, fuzzy
+msgid "invalid content of \\{\\}"
+msgstr "baliogabeko gehienezko zenbaketa"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr ""
+
+#: lib/dfa.c:1858
+#, fuzzy
+msgid "unbalanced ("
+msgstr "Parekatu gabeko ("
+
+#: lib/dfa.c:1975
+#, fuzzy
+msgid "no syntax specified"
+msgstr "Ez da sintaxirik zehaztu"
+
+#: lib/dfa.c:1986
+#, fuzzy
+msgid "unbalanced )"
+msgstr "Parekatu gabeko )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Sistemaren errore ezezaguna"
+
+#: lib/getopt.c:278
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: `%s' aukera anbiguoa da\n"
+
+#: lib/getopt.c:284
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: `%s' aukera anbiguoa da\n"
+
+#: lib/getopt.c:319
+#, fuzzy, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: aukera ezezaguna `%c%s'\n"
+
+#: lib/getopt.c:345
+#, fuzzy, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: `%c%s' aukerak ez du argumenturik onartzen\n"
+
+#: lib/getopt.c:360
+#, fuzzy, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: `%s' aukerak argumentu bat behar du\n"
+
+#: lib/getopt.c:621
+#, fuzzy, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: balio gabeko aukera -- %c\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, fuzzy, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: aukerak argumentu bat behar du -- %c\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "memoria agortuta"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr ""
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr ""
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr ""
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "`"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "'"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr ""
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr ""
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr ""
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr ""
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr ""
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr ""
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr ""
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr ""
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr ""
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr ""
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr ""
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr ""
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Memoria agortuta"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr ""
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr ""
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr ""
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ""
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr ""
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr ""
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr ""
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr ""
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, fuzzy, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"\n"
+"Programa-erroreen berri emateko idatzi hona <bug-grep@gnu.org>.\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr ""
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr ""
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr ""
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(sarrera estandarra)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "balio gabeko testuinguru luzeera argumentua"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "sarrera luzeegia da kontatzeko"
+
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "%s fitxategi binarioa bat dator\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "direktorio bukle errekurtsiboa"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr ""
+
+#: src/grep.c:1961 src/grep.c:1968
+#, fuzzy, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Erabilera: %s [AUKERA]... EREDUA [FITXATEGIA]...\n"
+
+#: src/grep.c:1963
+#, fuzzy, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Saiatu `%s --help' informazio gehiagorako.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr ""
+
+#: src/grep.c:1970
+#, fuzzy, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"EREDUA bilatzen du FITXATEGI bakoitzean edo sarrera estandarrean.\n"
+"Adibidez: %s -i 'kaixo mundu' menu.h main.c\n"
+"\n"
+"Regexp aukera eta interpretazioa:\n"
+
+#: src/grep.c:1975
+#, fuzzy, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     EREDUA espresio erregular zabaldu bat da\n"
+"  -F, --fixed-strings       EREDUA lerro berri batekin banatutako kate "
+"multzo bat da\n"
+"  -G, --basic-regexp        EREDUA oinarrizko espresio erregular bat da\n"
+"  -P, --perl-regexp         EREDUA Perl espresio erregular bat da\n"
+
+#: src/grep.c:1981
+#, fuzzy, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=EREDUA      erabili EREDUA espresio erregular bezala\n"
+"  -f, --file=FITXATEGIA           lortu EREDUA FITXATEGITIK\n"
+"  -i, --ignore-case         ez ezberdindu letra larri eta xeheak\n"
+"  -w, --word-regexp         behartu EREDUA hitz osoekin bakarrik bat "
+"etortzea\n"
+"  -x, --line-regexp         behartu EREDUA lerro osoekin bakarrik bat "
+"etortzea\n"
+"  -z, --null-data           datu lerroa 0 byte-arekin amaitzen da, eta ez "
+"lerro berriarekin\n"
+
+#: src/grep.c:1989
+#, fuzzy, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Hainbat:\n"
+"  -s, --no-messages         errore mezuak kentzen ditu\n"
+"  -v, --invert-match        bat ez datozen lerroak aukeratzen ditu\n"
+"  -V, --version             bertsioaren informazioa inprimatu eta irten\n"
+"      --help                laguntza hau erakutsi eta irten\n"
+"      --mmap                erabili asignatutako memoria sarrera posible "
+"bada\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"\n"
+"Kontestu kontrola:\n"
+"  -B, --before-context=KOPURUA  inprimatu kontestuaren aurretiko lerro "
+"KOPURUA\n"
+"  -A, --after-context=KOPURUA   inprimatu kontestuaren ondorengo lerro "
+"KOPURUA\n"
+"  -C, --context=KOPURUA         inprimatu kontestuaren lerro KOPURUA\n"
+"  -KOPURUA                      --context=KOPURUA bezala\n"
+"      --color[=NOIZ],\n"
+"      --colour[=NOIZ]       erabili markak bat datozen kateak ezberdintzeko\n"
+"                            NOIZ `always', `never' edo `auto' izan daiteke.\n"
+"  -U, --binary              ez kendu CR karaktereak lerro bukaeran (MSDOS)\n"
+"  -u, --unix-byte-offsets   hartu kontutan offsetak CRak bertan egongo ez "
+"balira bezala (MSDOS)\n"
+"\n"
+"`egrep'-ek`grep -E' esan nahi du.  `fgrep'-ek `grep -F' esan nahi du.\n"
+"Fitxategirik gabe, edo FITXATEGIA - denean, sarrera estandarra irakurtzen "
+"da.  BI fitxategi\n"
+"baina gutxiago ematen badira, -h ulertzen da.  Irteera egoera 0 da bat "
+"badator, 1 ez badator,\n"
+"eta 2 arazorik badago.\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "espresio konfliktiboak espezifikatu dira"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+
+#: src/grep.c:2103
+#, fuzzy, c-format
+msgid "invalid matcher %s"
+msgstr "baliogabeko gehienezko zenbaketa"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "gailu metodo ezezaguna"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "baliogabeko gehienezko zenbaketa"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "fitxategi-binario moeta ezezaguna"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr ""
+
+#: src/pcresearch.c:143
+#, fuzzy
+msgid "the -P option only supports a single pattern"
+msgstr "-P aukerak ez du euskarririk"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr ""
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr ""
+
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "memoria agortuta"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr ""
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr ""
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr ""
+
+#, fuzzy, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "abisua: %s: %s\n"
+
+#, fuzzy
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: `--%s' aukerak ez du argumenturik onartzen\n"
+
+#, fuzzy
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: aukera ezezaguna `--%s'\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: `-W %s' aukera ambiguoa da\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: `-W %s' aukerak ez du argumenturik onartzen\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: `%s' aukerak argumentu bat behar du\n"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "amaitu gabeko errepikapen zenbatzailea"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "gaizki eratutako errepikapen zenbatzailea"
+
+#~ msgid "out of memory"
+#~ msgstr "memoriatik kanpo"
+
+#~ msgid "writing output"
+#~ msgstr "irteera idazten"
+
+#~ msgid "Usage: %s [OPTION]... PATTERN [FILE] ...\n"
+#~ msgstr "Erabilera: %s [AUKERA]... EREDUA [FITXATEGIA] ...\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE\n"
+#~ "                            TYPE is 'binary', 'text', or 'without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories\n"
+#~ "                            ACTION is 'read', 'recurse', or 'skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets\n"
+#~ "                            ACTION is 'read' or 'skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=PATTERN     files that match PATTERN will be examined\n"
+#~ "      --exclude=PATTERN     files that match PATTERN will be skipped.\n"
+#~ "      --exclude-from=FILE   files that match PATTERN in FILE will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match only print FILE names containing no match\n"
+#~ "  -l, --files-with-matches  only print FILE names containing matches\n"
+#~ "  -c, --count               only print a count of matching lines per "
+#~ "FILE\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Irteera kontrola:\n"
+#~ "  -m, --max-count=KOPURUA       gelditu KOPURUA bilatzean\n"
+#~ "  -b, --byte-offset         inprimatu offset byte-a lerro irteerekin\n"
+#~ "  -n, --line-number         inprimatu lerro zenbakia lerro irteerekin\n"
+#~ "      --line-buffered       irauli irteera lerro bakoitzean\n"
+#~ "  -H, --with-filename       inprimatu fitxategi-izena bat datorren "
+#~ "aurkiketa bakoitzean\n"
+#~ "  -h, --no-filename         fitxategi-izena kendu irteeran\n"
+#~ "      --label=ETIKETA         inprimatu ETIKETA fitxategi-izen bezala "
+#~ "sarrera estandarrean\n"
+#~ "  -o, --only-matching       erakutsi EREDUAREKIN bat datorren lerroaren "
+#~ "zatia bakarrik\n"
+#~ "  -q, --quiet, --silent     kendu irteera normal guztiak\n"
+#~ "      --binary-files=MOETA   fitxategi binarioak MOETA bezala direlakoan "
+#~ "hartu\n"
+#~ "                            MOETA 'binary', 'text', edo 'without-match' "
+#~ "izan daiteke\n"
+#~ "  -a, --text                --binary-files=text bezala\n"
+#~ "  -I                        --binary-files=without-match bezala\n"
+#~ "  -d, --directories=EKINTZA  nola erabili direktorioak\n"
+#~ "                            EKINTZA 'read', 'recurse', edo 'skip' izan "
+#~ "daiteke\n"
+#~ "  -D, --devices=EKINTZA      nola erabili gailuak, FIFO eta socketak\n"
+#~ "                            EKINTZA 'read' edo 'skip' izan daiteke\n"
+#~ "  -R, -r, --recursive       --directories=recurse bezala\n"
+#~ "      --include=EREDUA     EREDUAREKIN bat datozen fitxategiak aztertu\n"
+#~ "      --exclude=EREDUA     EREDUAREKIN bat datozen fitxategiak utzi.\n"
+#~ "      --exclude-from=FITXATEGIA   EREDUA betetzen duten fitxategiak "
+#~ "FITXATEGIAN utzi.\n"
+#~ "  -L, --files-without-match inprimatu bateraketarik ez duten FITXATEGIAK "
+#~ "bakarrik\n"
+#~ "  -l, --files-with-matches  inprimatu bateraketaren bat duten FITXATEGIAK "
+#~ "bakarrik\n"
+#~ "  -c, --count               inprimatu bateraketa kopurua FITXATEGI "
+#~ "bakoitzeko bakarrik\n"
+#~ "  -Z, --null                inprimatu 0 byte-a FITXATEGIAREN izenaren "
+#~ "ondoren\n"
+
+#~ msgid "unknown directories method"
+#~ msgstr "direktorio metodo ezezaguna"
+
+#~ msgid "%s (GNU grep) %s\n"
+#~ msgstr "%s (GNU grep) %s\n"
+
+#~ msgid ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+#~ msgstr ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions. There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "Software librea da, ikusi programa-kodea kopiatzeko baldintzentzat. EZ "
+#~ "dago inolako bermerik;\n"
+#~ "ez KOMERTZIO ez ASMO ZEHATZ BATEN EGOKITASUNERAKO.\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "-P eta -z aukerak ezin dira konbinatu"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: ezinezko aukera -- %c\n"
diff --git a/src/grep/po/fi.gmo b/src/grep/po/fi.gmo
new file mode 100644
index 0000000..5b8a791
--- /dev/null
+++ b/src/grep/po/fi.gmo
diff --git a/src/grep/po/fi.po b/src/grep/po/fi.po
new file mode 100644
index 0000000..3dc535d
--- /dev/null
+++ b/src/grep/po/fi.po
@@ -0,0 +1,982 @@
+# Finnish translation for GNU grep.
+# Copyright © 2002, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2018 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Sami J. Laine <sami.laine@iki.fi>, 2002.
+# Jorma Karvonen <karvonen.jorma@gmail.com>, 2007-2016, 2018.
+# Lauri Nurmi <lanurmi@iki.fi>, 2019-2021.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 3.6.27\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-08-09 10:37+0300\n"
+"Last-Translator: Lauri Nurmi <lanurmi@iki.fi>\n"
+"Language-Team: Finnish <translation-team-fi@lists.sourceforge.net>\n"
+"Language: fi\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+"X-Generator: Poedit 3.0\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "virheellinen argumentti %s kohteelle %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "monimerkityksellinen argumentti %s kohteelle %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Kelvolliset argumentit ovat:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "ohjelmavirhe"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "pinon ylivuoto"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "kirjoitusvirhe"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "pariton ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "virheellinen merkkiluokka"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "merkkiluokkasyntaksi on [[:space:]], ei [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "keskeneräinen \\-ohjaussarja"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "virheellinen \\{\\}:n sisältö"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "säännöllinen lauseke on liian suuri"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "pariton ("
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "syntaksia ei ole määritelty"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "pariton )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Tuntematon järjestelmävirhe"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: valitsin ”%s%s” on moniselitteinen\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: valitsin ”%s%s” on moniselitteinen; vaihtoehdot:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: tunnistamaton valitsin ”%s%s”\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: valitsin ”%s%s” ei salli argumenttia\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: valitsin ”%s%s” vaatii argumentin\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: virheellinen valitsin -- ”%c”\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: valitsin vaatii argumentin -- ”%c”\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "muisti loppui"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "nykyisen työhakemiston kirjaaminen ei onnistu"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "palaaminen alkuperäiseen työhakemistoon epäonnistui"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "tiedostokahvan teksti-/binääritilan asettaminen epäonnistui"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "”"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "”"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Onnistui"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Ei täsmäävyyttä"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Virheellinen säännöllinen lauseke"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Virheellinen vertailumerkki"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Virheellinen merkkiluokan nimi"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Kenoviiva lopussa"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Virheellinen takaisinviittaus"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Pariton [, [^, [:, [. tai [="
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "Pariton ( tai \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "Pariton \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Virheellinen \\{\\}:n sisältö"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Virheellinen välin loppu"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Muisti loppui"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Virheellinen edeltävä säännöllinen lauseke"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Ennenaikainen säännöllisen lausekkeen loppu"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Säännöllinen lauseke on liian suuri"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "Pariton ) tai \\)"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Ei edeltävää säännöllistä lauseketta"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Paketoinut %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Paketoinut %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Lisenssi GPLv3+: GNU GPL versio 3 tai myöhäisempi <%s>.\n"
+"Tämä on vapaa ohjelma: voit vapaasti muuttaa ja jakaa sitä edelleen.\n"
+"Ohjelmalla EI OLE TAKUUTA siinä laajuudessa kuin laki sen sallii.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Kirjoittanut %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Kirjoittaneet %s ja %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Kirjoittaneet %s, %s ja %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Kirjoittaneet %s, %s,\n"
+"%s ja %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Kirjoittaneet %s, %s, %s,\n"
+"%s ja %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Kirjoittaneet %s, %s, %s,\n"
+"%s, %s ja %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Kirjoittaneet %s, %s, %s,\n"
+"%s, %s, %s ja %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Kirjoittaneet %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s ja %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Kirjoittaneet %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s ja %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Kirjoittaneet %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, %s ja muut.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "Ilmoita ohjelmistovioista (englanniksi) osoitteeseen: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Ilmoita %s ohjelmistovioista (englanniksi) osoitteeseen %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "%s -kotisivu: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Yleisohjeita GNU-ohjelmistojen käyttöön: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(vakiosyöte)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "virheellinen kontekstin pituusargumentti"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "syöte on liian suuri laskettavaksi"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: binääritiedosto täsmää"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: varoitus: rekursiivinen hakemistosilmukka"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: syötetiedosto on myös tuotostiedosto"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Käyttö: %s [VALITSIN]... HAHMOT [TIEDOSTO]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Komento ”%s --help” antaa lisää tietoa.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Hae HAHMOja kustakin TIEDOSTOsta.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Esimerkki: %s -i 'hei maailma' menu.h main.c\n"
+"HAHMOT voivat sisältää useita rivinvaihdoin\n"
+"eroteltuja hahmoja.\n"
+"\n"
+"Hahmojen valinta ja tulkinta:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     HAHMOT ovat laajennettuja säännöllisiä\n"
+"                              lausekkeita\n"
+"  -F, --fixed-strings       HAHMOT ovat merkkijonoja\n"
+"  -G, --basic-regexp        HAHMOT ovat tavallisia säännöllisiä\n"
+"                              lausekkeita (oletus)\n"
+"  -P, --perl-regexp         HAHMOT ovat Perl-tyyppisiä säännöllisiä\n"
+"                              lausekkeita\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=HAHMOT       käytä HAHMOja täsmäämiseen\n"
+"  -f, --file=TIEDOSTO       ota HAHMOT TIEDOSTOsta\n"
+"  -i, --ignore-case         älä erottele pieniä ja suuria kirjaimia\n"
+"                              hahmoissa eikä datassa\n"
+"  -w, --word-regexp         täsmää vain kokonaisiin sanoihin\n"
+"  -x, --line-regexp         täsmää vain kokonaisiin riveihin\n"
+"  -z, --null-data           datarivi päättyy 0-tavuun, ei rivinvaihtoon\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Sekalaista:\n"
+"  -s, --no-messages         vaienna virheilmoitukset\n"
+"  -v, --invert-match        valitse täsmäämättömät rivit\n"
+"  -V, --version             näytä versiotiedot ja poistu\n"
+"      --help                näytä tämä ohje ja poistu\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Tulostehallinta:\n"
+"  -m, --max-count=MÄÄRÄ     pysäytä MÄÄRÄn täsmäävän rivin jälkeen\n"
+"  -b, --byte-offset         tulosta tavusiirros tulosteriveille\n"
+"  -n, --line-number         tulosta rivinumero tulosteriveille\n"
+"      --line-buffered       huuhtele tuloste joka rivillä\n"
+"  -H, --with-filename       tulosta tiedostonimi tulosteriveille\n"
+"  -h, --no-filename         vaienna tiedostonimet tulosteesta\n"
+"      --label=NIMIÖ         tulosta NIMIÖ tiedostonimenä vakiosyötteelle\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       näytä vain täsmäävien rivien epätyhjät osat\n"
+"  -q, --quiet, --silent     vaienna kaikki normaali tuloste\n"
+"      --binary-files=TYYPPI otaksu, että binääritiedostot ovat TYYPPIä;\n"
+"                            TYYPPI on ”binary”, ”text”, tai ”without-match”\n"
+"  -a, --text                sama kuin --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        sama kuin --binary-files=without-match\n"
+"  -d, --directories=TEKO    kuinka käsitellä hakemistoja;\n"
+"                            TEKO on ”read”, ”recurse”, tai ”skip”\n"
+"  -D, --devices=TEKO        kuinka käsitellä laitteita, FIFOja ja "
+"pistokkeita;\n"
+"                            TEKO on ”read” tai ”skip”\n"
+"  -r, --recursive           sama kuin --directories=recurse\n"
+"  -R, --dereference-recursive  samoin, mutta seuraa kaikkia symlinkkejä\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=GLOB        etsi vain GLOBiin (tiedostohahmo) täsmäävistä\n"
+"                              tiedostoista\n"
+"      --exclude=GLOB        ohita GLOBiin täsmäävät tiedostot ja hakemistot\n"
+"      --exclude-from=TIED   ohita mihin tahansa TIEDoston tiedostohahmoon\n"
+"                              täsmäävät tiedostot\n"
+"      --exclude-dir=GLOB    ohita GLOBiin täsmäävät hakemistot\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match tulosta vain TIEDOSTOjen nimet, joissa ei yhtään "
+"valittua riviä\n"
+"  -l, --files-with-matches  tulosta vain TIEDOSTOjen nimet, joissa on "
+"valittuja rivejä\n"
+"  -c, --count               tulosta vain valittujen rivien lukumäärä "
+"TIEDOSTOa kohden\n"
+"  -T, --initial-tab         kohdista sarkaimet (jos tarpeellista)\n"
+"  -Z, --null                tulosta 0-tavu TIEDOSTOnimen jälkeen\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Kontekstin hallinta:\n"
+"  -B, --before-context=N    tulosta N riviä edeltävää konteksia\n"
+"  -A, --after-context=N     tulosta N riviä seuraavaa kontekstia\n"
+"  -C, --context=N           tulosta N riviä tulostekonteksia\n"
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -MÄÄRÄ                    sama kuin --context=MÄÄRÄ\n"
+"      --group-separator=EROT tulosta EROTin kontekstillisten täsmäävyyksien\n"
+"                            välisille riveille\n"
+"      --no-group-separator  älä tulosta erotinta kontekstillisille\n"
+"                            täsmäävyyksille\n"
+"      --color[=KUN],\n"
+"      --colour[=KUN]        korosta täsmäävyydet väreillä;\n"
+"                            KUN voi olla ”always” (aina), ”never”\n"
+"                            (ei koskaan) tai ”auto”.\n"
+"  -U, --binary              jätä CR-merkit rivien loppuun (MSDOS/Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Kun TIEDOSTO on ”-”, lue vakiosyötettä. Ilman TIEDOSTOa lue ”.” jos\n"
+"haetaan rekursiivisesti, muuten ”-” . Jos alle kaksi TIEDOSTOa\n"
+"on annettu, oleta valitsin -h.\n"
+"Paluuarvo on 0, jos mikä tahansa rivi valitaan, muuten 1; jos\n"
+"tapahtuu mikä tahansa virhe ja -q on antamatta, paluuarvo on 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "määritelty ristiriitaiset täsmäimet"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"Perl-täsmäystä ei tueta --disable-perl-regexp -valitsimellisessa käännöksessä"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "virheellinen täsmäin %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "tuntematon laitteiden käsittelytapa"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr "varoitus: --unix-byte-offsets (-u) on vanhentunut"
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "virheellinen enimmäismäärä"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "tuntematon binääritiedostojen tyyppi"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Kirjoittaneet Mike Haertel ja muut; ks.\n"
+"<http://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "muistin varaaminen PCRE JIT -pinolle epäonnistui"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P tukee vain yksitavu- ja UTF-8-maa-asetustoja"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "valitsin -P tukee vain yhtä hahmoa"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "sisäinen virhe (ei pitäisi koskaan tapahtua)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "ylitettiin PCRE:n rivipituusraja"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: muisti loppui"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: PCRE JIT -pino täyttyi"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: ylitettiin PCRE:n paluujäljitysraja"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: ylitettiin PCRE:n rekursioraja"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: sisäinen PCRE-virhe: %d"
+
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr "varoitus: GREP_OPTIONS on vanhentunut; käytä aliasta tai skriptiä"
+
+#~ msgid "warning: %s: %s"
+#~ msgstr "varoitus: %s: %s"
+
+#~ msgid "Binary file %s matches\n"
+#~ msgstr "Binääritiedosto %s täsmää\n"
+
+#~ msgid "%s home page: <http://www.gnu.org/software/%s/>\n"
+#~ msgstr "%s kotisivu: <http://www.gnu.org/software/%s/>\n"
+
+#  Ensimmäinen parametri on valitsimen väliviivat, toinen valitsin, kolmas argumentti
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "virheellinen valitsimen %s%s argumentti ’%s’"
+
+#  Ensimmäinen parametri on valitsimen väliviivat, toinen valitsin ja kolmas sen argumentti
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "virheellinen loppuliite valitsimen %s%s argumentissa ’%s’"
+
+#  Ensimmäinen parametri on valitsimen väliviivat, toinen valitsin ja kolmas sen argumentti
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "valitsimen %s%s argumentti ’%s’ on liian iso"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "internal error"
+#~ msgstr "sisäinen virhe"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: valitsin ’--%s’ ei salli argumenttia\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: tuntematon valitsin ’--%s’\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: valitsin ’-W %s’ ei ole yksiselitteinen\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: valitsin ’-W %s’ ei salli argumenttia\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: valitsin ’-W %s’ tarvitsee argumentin\n"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "HAKULAUSEKE on oletuksena perussäännöllinen lauseke (BRE).\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "Käsky ’egrep’ tarkoittaa ’grep -E’.  Käsky ’fgrep’ tarkoittaa ’grep -F’.\n"
+#~ "Suora kutsuminen ’egrep’- ja ’fgrep’-käskyillä ei ole enää "
+#~ "suositeltavaa.\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "lseek epäonnistui"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "GNU Grep-kotisivu: <%s>\n"
+
+#~ msgid "invalid UTF-8 byte sequence in input"
+#~ msgstr "virheellinen UTF-8-tavusekvenssi syötteessä"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "HAKULAUSEKE on laajennettu säännöllinen lauseke (ERE).\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr ""
+#~ "Kutsuminen ’egrep’ käskyllä ei ole enää suositeltavaa, käytä sen sijaan "
+#~ "käskyä ’grep -E’.\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr "HAKULAUSEKE on rivinvaihdolla eroteltu kiinteä merkkijonojoukko.\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr ""
+#~ "Kutsuminen ’fgrep’ käskyllä ei ole enää suositeltavaa, käytä sen sijaan "
+#~ "käskyä ’grep -F’.\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s voi käyttää vain %s hakulausekesyntaksia"
+
+#~ msgid "the --mmap option has been a no-op since 2010"
+#~ msgstr "valitsin --mmap ei ole toiminut vuoden 2010 jälkeen"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "päättymätön toistomäärä"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "virheellinen toistomäärä"
+
+#  Tämä liittyy virheilmoitukseen, jossa alussa on ilmeisesti virhenumero
+#~ msgid "writing output"
+#~ msgstr "kirjoitettaessa tulostetta"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity needs a value (\"=...\"); "
+#~ "skipped"
+#~ msgstr ""
+#~ "kohteessa GREP_COLORS=”%s”, ”%s”-kapasiteetti tarvitsee arvon (”=...”); "
+#~ "jätettiin väliin"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity is boolean and cannot take a "
+#~ "value (\"=%s\"); skipped"
+#~ msgstr ""
+#~ "kohteessa GREP_COLORS=”%s”, ”%s”-kapasiteetti on boolean-tyyppinen ja se "
+#~ "ei voi saada arvoa (”=%s”); jätettiin väliin"
+
+#~ msgid "in GREP_COLORS=\"%s\", the \"%s\" capacity %s"
+#~ msgstr "kohteessa GREP_COLORS=”%s”, ”%s”-kapasiteetti %s"
+
+#~ msgid ""
+#~ "stopped processing of ill-formed GREP_COLORS=\"%s\" at remaining "
+#~ "substring \"%s\""
+#~ msgstr ""
+#~ "pysäytettiin vääränmuotoisen kohteen GREP_COLORS=”%s” prosessointi "
+#~ "jäljelle jäävässä osamerkkijonossa ”%s”"
+
+#~ msgid "unknown directories method"
+#~ msgstr "tuntematon hakemistometodi"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE;\n"
+#~ "                            TYPE is `binary', `text', or `without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories;\n"
+#~ "                            ACTION is `read', `recurse', or `skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+#~ "                            ACTION is `read' or `skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=FILE_PATTERN  search only files that match FILE_PATTERN\n"
+#~ "      --exclude=FILE_PATTERN  skip files and directories matching "
+#~ "FILE_PATTERN\n"
+#~ "      --exclude-from=FILE   skip files matching any file pattern from "
+#~ "FILE\n"
+#~ "      --exclude-dir=PATTERN directories that match PATTERN will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match print only names of FILEs containing no "
+#~ "match\n"
+#~ "  -l, --files-with-matches  print only names of FILEs containing matches\n"
+#~ "  -c, --count               print only a count of matching lines per "
+#~ "FILE\n"
+#~ "  -T, --initial-tab         make tabs line up (if needed)\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Tulosteen hallinta:\n"
+#~ "  -m, --max-count=N         lopeta kun N täsmäystä on löytynyt\n"
+#~ "  -b, --byte-offset         tulosta tavuosoite tulosteriveille\n"
+#~ "  -n, --line-number         tulosta rivinumero tulosteriveille\n"
+#~ "      --line-buffered       tyhjennä puskuri jokaisella tulosterivillä\n"
+#~ "  -H, --with-filename       tulosta tiedostonimi jokaiselle täsmäykselle\n"
+#~ "  -h, --no-filename         vaienna tiedostonimen tulostaminen\n"
+#~ "      --label=OTSIKKO       tulosta OTSIKKO tiedostonimenä luettaessa\n"
+#~ "                            vakiosyöttettä\n"
+#~ "  -o, --only-matching       näytä vain HAKULAUSEKE-täsmäävä osa rivistä\n"
+#~ "  -q, --quiet, --silent     vaienna kaikki normaalit tulosteet\n"
+#~ "      --binary-files=TYYPPI oleta binääristen tiedostojen olevan TYYPPIä\n"
+#~ "                            TYYPPI on ”binary” (binääri), "
+#~ "”text” (teksti), tai\n"
+#~ "                            ”without-match” (täsmäämätön)\n"
+#~ "  -a, --text                sama kuin --binary-files=”text” (teksti)\n"
+#~ "  -I                        sama kuin --binary-files=”without-"
+#~ "match” (täsmäämätön)\n"
+#~ "  -d, --directories=TOIMI   hakemistojen käsittelytapa\n"
+#~ "                            TOIMI on ”read” (lue), ”recurse” (itseensä "
+#~ "palautuva),\n"
+#~ "                            tai ”skip” (jätä väliin)\n"
+#~ "  -D, --devices=TOIMI       laitetiedostojen, FIFOjen ja pistokkeiden "
+#~ "käsittely\n"
+#~ "                            TOIMI on ”read” (lue) tai ”skip” (jätä "
+#~ "väliin)\n"
+#~ "  -R, -r, --recursive         sama kuin --directories=recurse\n"
+#~ "      --include=TIEDOSTOKAAVA TIEDOSTOKAAVA-täsmäävät tiedostot "
+#~ "tutkitaan\n"
+#~ "      --exclude=TIEDOSTOKAAVA TIEDOSTOKAAVA-täsmäävät tiedostot jätetään "
+#~ "tutkimatta\n"
+#~ "      --exclude-from=TIEDOSTO TIEDOSTOKAAVA-täsmäävät tiedostot, joiden "
+#~ "nimet\n"
+#~ "                              luetaan TIEDOSTOsta, jätetään tutkimatta\n"
+#~ "  -L, --files-without-match tulosta vain TIEDOSTOt, joista ei löydy "
+#~ "täsmäystä\n"
+#~ "  -l, --files-with-matches  tulosta vain TIEDOSTOt, joista löytyy "
+#~ "täsmäys\n"
+#~ "  -c, --count               tulosta vain täsmäysten määrä TIEDOSTOlle\n"
+#~ "  -T, --initial-tab         tee sarkaimet riveittäin (jos tarvitaan)\n"
+#~ "  -Z, --null                tulosta nollatavu TIEDOSTO-nimen jälkeen\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "Valitsimia ”-P” ja ”-z” ei voida käyttää samanaikaisesti"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: epäkelpo valitsin -- %c\n"
+
+#~ msgid "Copyright (C) 2010 Free Software Foundation, Inc.\n"
+#~ msgstr "Copyright © 2010 Free Software Foundation, Inc.\n"
+
+#~ msgid "`egrep' means `grep -E'.  `fgrep' means `grep -F'.\n"
+#~ msgstr "”egrep” tarkoittaa ”grep -E”.  ”fgrep” tarkoittaa ”grep -F”.\n"
+
+#~ msgid "Direct invocation as either `egrep' or `fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "Suora kutsuminen joko komennolla ”egrep” tai ”fgrep” on vanhentunut.\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Miscellaneous:\n"
+#~ "  -s, --no-messages         suppress error messages\n"
+#~ "  -v, --invert-match        select non-matching lines\n"
+#~ "  -V, --version             print version information and exit\n"
+#~ "      --help                display this help and exit\n"
+#~ "\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Sekalaista:\n"
+#~ "  -s, --no-messages         vaienna virheilmoitukset\n"
+#~ "  -v, --invert-match        valitse hakuun täsmäämättömät rivit\n"
+#~ "  -V, --version             tulosta versiotiedot ja poistu\n"
+#~ "      --help                tulosta tämä ohje ja poistu\n"
+#~ "\n"
diff --git a/src/grep/po/fr.gmo b/src/grep/po/fr.gmo
new file mode 100644
index 0000000..f56b1e3
--- /dev/null
+++ b/src/grep/po/fr.gmo
diff --git a/src/grep/po/fr.po b/src/grep/po/fr.po
new file mode 100644
index 0000000..4d79e49
--- /dev/null
+++ b/src/grep/po/fr.po
@@ -0,0 +1,781 @@
+# Messages français pour GNU concernant grep.
+# Copyright © 2002, 2005, 2009, 2010, 2011, 2012, 2013, 2014 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+#
+# Michel Robitaille <robitail@IRO.UMontreal.CA>, 2002, 2005.
+# Nicolas Provost <nprovost@quadriv.com>, 2009, 2010.
+# Jean-Christophe Helary <jean.christophe.helary@gmail.com>, 2011.
+# David Prévot <david@tilapin.org>, 2012-2014.
+# Stéphane Aulery <lkppo@free.fr>, 2016, 2017, 2019, 2020.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: GNU grep 3.5.16\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2020-12-15 20:56+0100\n"
+"Last-Translator: Stéphane Aulery <lkppo@free.fr>\n"
+"Language-Team: French <traduc@traduc.org>\n"
+"Language: fr\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"Plural-Forms: nplurals=2; plural=(n > 1);\n"
+"X-Generator: Poedit 2.4.2\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "argument %s incorrect pour %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "argument %s ambigu pour %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Les arguments valables sont :"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "erreur du programme"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "débordement de pile"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "erreur d'écriture"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "[ non apparié"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "classe de caractères incorrecte"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "la syntaxe d'une classe de caractères est [[:space:]], pas [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "séquence d'échappement \\ non terminée"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "contenu de \\{\\} incorrect"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "expression rationnelle trop grande"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "( non appariée"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "aucune syntaxe indiquée"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr ") non appariée"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Erreur système inconnue"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s : l'option « %s%s » est ambiguë\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s : l'option « %s%s » est ambiguë ; possibilités :"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s : option « %s%s » non reconnue\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s : l'option « %s%s » n'accepte pas d'argument\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s : l'option « %s%s » nécessite un argument\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s : option incorrecte — « %c »\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s : l'option nécessite un argument — « %c »\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "mémoire épuisée"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "impossible d'enregistrer le répertoire de travail actuel"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "échec de retour au répertoire initial de travail"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr ""
+"l’obtention d’un descripteur de fichier en mode text / binaire a échoué"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "« "
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr " »"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Réussite"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Pas de correspondance"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Expression rationnelle incorrecte"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Caractère de collation incorrect"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Nom de classe de caractères incorrect"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Barre oblique inverse finale"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Référence arrière incorrecte"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "[, [^, [:, [. ou [= sans correspondance"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "( ou \\( sans correspondance"
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "\\{ sans correspondance"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Contenu de \\{\\} incorrect"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Fin d'intervalle incorrecte"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Mémoire épuisée"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Expression rationnelle précédente incorrecte"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Fin prématurée d'expression rationnelle"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Expression rationnelle trop grande"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ") ou \\) sans correspondance"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Pas d'expression rationnelle précédente"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Empaqueté par %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Empaqueté par %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Licence GPLv3+: GNU GPL version 3 ou ultérieure <%s>.\n"
+"Logiciel libre : vous êtes libre de le modifier ou de le redistribuer.\n"
+"Il n'y a AUCUNE GARANTIE, dans les limites autorisées par la loi.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Écrit par %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Écrit par %s et %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Écrit par %s, %s et %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Écrit par %s, %s, %s,\n"
+"et %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Écrit par %s, %s, %s,\n"
+"%s, et %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Écrit par %s, %s, %s,\n"
+"%s, %s, et %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Écrit par %s, %s, %s,\n"
+"%s, %s, %s, et %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Écrit par %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"et %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Écrit par %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, et %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Écrit par %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, et d'autres.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "Signalez toute anomalie à : %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Signalez les anomalies de %s à : %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Page d'accueil de %s : <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Aide globale sur les logiciels GNU : <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(entrée standard)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "argument de longueur de contexte incorrect"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "taille des données en entrée trop importante pour compter"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s : fichiers binaires correspondent"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s : attention : boucle de répertoire récursive"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s : le fichier d'entrée est aussi le fichier de sortie"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Usage : %s [OPTION]... MOTIFS [FICHIER]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr ""
+"Exécutez « %s --help » pour obtenir des renseignements complémentaires.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Chercher des MOTIFS dans chaque FICHIER.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Exemple : %s -i 'Bonjour, le monde' menu.h main.c\n"
+"\n"
+"MOTIFS peut contenir plusieurs motifs séparés par des sauts de ligne.\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     MOTIFS sont des expressions rationnelles "
+"étendues\n"
+"  -F, --fixed-regexp        MOTIFS sont des chaînes\n"
+"  -G, --basic-regexp        MOTIFS sont des expressions rationnelles "
+"ordinaires\n"
+"  -P, --perl-regexp         MOTIFS sont des expressions rationnelles Perl\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=MOTIFS       utiliser MOTIFS pour la recherche\n"
+"  -f, --file=FICHIER        charger les MOTIFS depuis un FICHIER\n"
+"  -i, --ignore-case         ignorer la différence de casse des motifs et "
+"données\n"
+"  -w, --word-regexp         rechercher des mots entiers\n"
+"  -x, --line-regexp         rechercher des lignes entières\n"
+"  -z, --null-data           finir les lignes de données par un octet nul, "
+"pas une saut de ligne\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Divers :\n"
+"  -s, --no-messages         supprimer les messages d'erreur\n"
+"  -v, --invert-match        sélectionner les lignes sans correspondance\n"
+"  -V, --version             afficher le nom et la version du logiciel\n"
+"      --help                afficher l'aide et quitter\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Contrôle de la sortie :\n"
+"  -m, --max-count=NOMBRE    arrêter après NOMBRE de ligne sélectionnées\n"
+"  -b, --byte-offset         afficher la position en octet avec la sortie\n"
+"  -n, --line-number         afficher le numéro de ligne avec la sortie\n"
+"      --line-buffered       vider le tampon après chaque ligne\n"
+"  -H, --with-filename       afficher le nom de fichier avec les lignes\n"
+"  -h, --no-filename         supprimer le préfixe de nom de fichier en "
+"sortie\n"
+"      --label=ÉTIQUETTE     utiliser ÉTIQUETTE pour le préfixe d'entrée "
+"standard\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       n'afficher que la partie de ligne "
+"correspondante\n"
+"  -q, --quiet, --silent     supprimer tout affichage vers la sortie "
+"standard\n"
+"      --binary-files=TYPE   considérer que les fichiers binaires sont de "
+"type\n"
+"                            TYPE : « binary », « text » ou « without-"
+"match »\n"
+"  -a, --text                identique à --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        identique à --binary-files=without-match\n"
+"  -d, --directories=ACTION  la façon de traiter les répertoires ;\n"
+"                            ACTION est « read », « recurse » ou « skip »\n"
+"  -D, --devices=ACTION      la façon de traiter les périphériques, les "
+"FIFOS\n"
+"                            et les sockets ; ACTION est « read » ou "
+"« skip »\n"
+"  -r, --recursive           identique à --directories=recurse\n"
+"  -R, --dereference-recursive  similaire, mais avec suivi des liens "
+"symboliques\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=GLOB        ne chercher que les fichiers correspondants à "
+"GLOB (motif de fichier)\n"
+"      --exclude=GLOB        ignorer les fichiers correspondants à GLOB\n"
+"      --exclude-from=FICHIER    ignorer les fichiers correspondants aux "
+"motifs contenus dans un FICHIER\n"
+"      --exclude-dir=GLOB    ignorer les répertoires correspondants à GLOB\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match n'afficher que les fichiers sans lignes "
+"sélectionnées\n"
+"  -l, --files-with-matches  n'afficher que les fichiers avec des lignes "
+"sélectionnées\n"
+"  -c, --count               n'afficher que le nombre de lignes sélectionnées "
+"par FICHIER\n"
+"  -T, --initial-tab         insérer des tabulations (si nécessaire)\n"
+"  -Z, --null                afficher l'octet nul après le nom de fichier\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Contrôle de contexte :\n"
+"  -B, --before-context=NBRE afficher NBRE lignes de contexte avant\n"
+"  -A, --after-context=NBRE  afficher NBRE lignes de contexte après\n"
+"  -C, --context=NBRE        afficher NBRE lignes de contexte en sortie\n"
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NOMBRE                   identique à --context=NOMBRE\n"
+"      --color[=QUAND],\n"
+"      --colour[=QUAND]      mettre en évidence les correspondances ; QUAND "
+"est\n"
+"                            « always » (toujours) « never » (jamais) ou "
+"« auto »\n"
+"  -U, --binary              ne pas enlever les retours chariot en fin de "
+"ligne (MSDOS/Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Si FICHIER vaut « - », lire l'entrée standard. Sans FICHIER, lire « . ».\n"
+"Si mode récursif, autrement « - »\n"
+"Si moins de deux fichiers sont indiqués, supposer -h.\n"
+"Le code d'erreur est 0 si une ligne est sélectionnée, 1 autrement ;\n"
+"en cas d'erreur et si l'option -q n'est pas présente, le code est 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "opérateurs de correspondance indiqués en conflit"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"Correspondance Perl non prise en charge pour un binaire construit avec "
+"l'option --disable-perl-regexp"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "motif de correspondance incorrect %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "méthode d'examen des périphériques inconnue"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "décompte maximal incorrect"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "type de fichier binaire inconnu"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Écrit par Mike Haertel et d'autres ; voir\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "échec d’allocation mémoire pour la pile JIT PCRE"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P ne fonctionne qu’avec des paramètres régionaux monooctets ou UTF-8"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "l'option -P ne permet d'utiliser qu'un seul motif"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "erreur interne (ça ne devrait jamais arriver)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "limite de longueur de ligne des PCRE dépassée"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s : mémoire épuisée"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s : pile PCRE JIT épuisée"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s : limite de retour arrière des PCRE dépassée"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s : limite de récursion PCRE dépassée"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s : erreur PCRE interne : %d"
+
+#~ msgid "warning: %s: %s"
+#~ msgstr "Avertissement : %s : %s"
+
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr ""
+#~ "Avertissement : GREP_OPTIONS doit être abandonnée ; veuillez utiliser un "
+#~ "alias ou un script"
+
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "Page d'accueil de %s : <https://www.gnu.org/software/%s/>\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "argument %s%s incorrect « %s »"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "suffixe incorrect dans l'argument %s%s « %s »"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "argument %s%s « %s » trop grand"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "internal error"
+#~ msgstr "erreur interne"
diff --git a/src/grep/po/ga.gmo b/src/grep/po/ga.gmo
new file mode 100644
index 0000000..ea4b57a
--- /dev/null
+++ b/src/grep/po/ga.gmo
diff --git a/src/grep/po/ga.po b/src/grep/po/ga.po
new file mode 100644
index 0000000..e3f1f02
--- /dev/null
+++ b/src/grep/po/ga.po
@@ -0,0 +1,957 @@
+# Irish translations for grep.
+# Copyright (C) 2003 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Kevin Patrick Scannell <scannell@SLU.EDU>, 2003, 2007, 2009, 2011, 2017.
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 3.0.23-b00\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2017-06-25 05:18-0600\n"
+"Last-Translator: Kevin Scannell <kscanne@gmail.com>\n"
+"Language-Team: Irish <gaeilge-gnulinux@lists.sourceforge.net>\n"
+"Language: ga\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "argóint neamhbhailí %s le haghaidh %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "argóint dhébhríoch %s le haghaidh %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Na hargóintí bailí:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr ""
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr ""
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "earráid sa scríobh"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "[ corr"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "Aicme charachtar neamhbhailí"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr ""
+"Is é [[:space:]] an chomhréir cheart in aicme carachtar, in ionad [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "Seicheamh éalúcháin \\ gan chríochnú"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "ábhar neamhbhailí laistigh de \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "slonn ionadaíochta rómhór"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "( corr"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "níor sonraíodh aon chomhréir"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr ") corr"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Earráid anaithnid chórais"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: tá rogha '%s%s' débhríoch\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: tá rogha '%s%s' débhríoch; féidearthachtaí:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: rogha anaithnid '%s%s'\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: ní cheadaítear argóint i ndiaidh rogha '%s%s'\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: tá argóint de dhíth i ndiaidh rogha '%s%s'\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: rogha neamhbhailí -- '%c'\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: tá argóint de dhíth i ndiaidh na rogha -- '%c'\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "cuimhne ídithe"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "ní féidir an chomhadlann oibre a fháil"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "níorbh fhéidir filleadh ar an mbunchomhadlann oibre"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "níorbh fhéidir mód téacs/dénártha an tuairisceora comhaid a shocrú"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "`"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "'"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "D'éirigh leis"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Níl a leithéid ann"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Slonn ionadaíochta neamhbhailí"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Carachtar neamhbhailí cóimheasa"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Ainm neamhbhailí ar aicme charachtar"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Cúlslais ag an deireadh"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Cúltagairt neamhbhailí"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "[, [^, [:, [., nó [= corr"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "( nó \\( corr"
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "\\{ corr"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Ábhar neamhbhailí laistigh de \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Deireadh raoin neamhbhailí"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Cuimhne ídithe"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Tá an slonn ionadaíochta roimhe seo neamhbhailí"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Deireadh an tsloinn gan choinne"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Slonn ionadaíochta rómhór"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ") nó \\) corr"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Níl aon slonn ionadaíochta roimhe seo"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Arna phacáistiú ag %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Arna phacáistiú ag %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, fuzzy, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"\n"
+"Ceadúnas GPLv3+: GNU GPL leagan 3 nó níos nuaí <http://gnu.org/licenses/gpl."
+"html>.\n"
+"Is saorbhogearra é seo: ceadaítear duit é a athrú agus a athdháileadh.\n"
+"Níl baránta AR BITH ann, an oiread atá ceadaithe de réir dlí.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Scríofa ag %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Scríofa ag %s agus %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Scríofa ag %s, %s, agus %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Scríofa ag %s, %s, %s,\n"
+"agus %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Scríofa ag %s, %s, %s,\n"
+"%s, agus %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Scríofa ag %s, %s, %s,\n"
+"%s, %s, agus %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Scríofa ag %s, %s, %s,\n"
+"%s, %s, %s, agus %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Scríofa ag %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"agus %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Scríofa ag %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, agus %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Scríofa ag %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, agus daoine eile nach iad.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, fuzzy, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"\n"
+"Seol tuairiscí ar fhabhtanna chuig: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Seol tuairiscí ar fhabhtanna i %s chuig: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Leathanach baile %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, fuzzy, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr ""
+"Cabhair ghinearálta maidir le bogearraí GNU: <http://www.gnu.org/gethelp/>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(gnáth-ionchur)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "tá an argóint a shonraíonn fad an chomhthéacs neamhbhailí"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "tá an t-ionchur rómhór le háireamh"
+
+# using lit. "matching string" throughout for "match" - KPS
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "Teaghrán comhoiriúnach sa chomhad dhénártha %s\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "lúb athchúrsach i gcomhadlann"
+
+#: src/grep.c:1899
+#, fuzzy, c-format
+msgid "%s: input file is also the output"
+msgstr "is ionann an t-inchomhad %s agus an t-aschomhad"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, fuzzy, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Úsáid: %s [ROGHA]... PATRÚN [COMHAD]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Bain triail as '%s --help' chun tuilleadh eolais a fháil.\n"
+
+#: src/grep.c:1969
+#, fuzzy, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Déan cuardach ar PATRÚN i ngach COMHAD.\n"
+
+#: src/grep.c:1970
+#, fuzzy, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Mar shampla: %s -i 'dia duit' rogha.h príomh.c\n"
+"\n"
+"Roghnú agus léirmhíniú patrún:\n"
+
+#: src/grep.c:1975
+#, fuzzy, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     is slonn ionadaíochta breisithe é PATRÚN\n"
+"  -F, --fixed-strings       is tacar teaghrán é PATRÚN, línte nua eatarthu\n"
+"  -G, --basic-regexp        is slonn ion. bunúsach é PATRÚN (réamhshocrú)\n"
+"  -P, --perl-regexp         is slonn ionadaíochta Perl é PATRÚN\n"
+
+#: src/grep.c:1981
+#, fuzzy, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=PATRÚN       déan cuardach ar PATRÚN\n"
+"  -f, --file=COMHAD         faigh PATRÚN as COMHAD\n"
+"  -i, --ignore-case         déan neamhaird de chás na litreacha\n"
+"  -w, --word-regexp         meaitseálann PATRÚN focail iomlána amháin\n"
+"  -x, --line-regexp         meaitseálann PATRÚN línte iomlána amháin\n"
+"  -z, --null-data           léiríonn beart '0' deireadh na líne (vs. \\n)\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Roghanna éagsúla:\n"
+"  -s, --no-messages         ná taispeáin teachtaireachtaí earráide\n"
+"  -v, --invert-match        taispeáin na línte GAN teaghrán comhoiriúnach\n"
+"  -V, --version             taispeáin eolas faoin leagan agus scoir\n"
+"      --help                taispeáin an chabhair seo agus scoir\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Rialú aschurtha:\n"
+"  -m, --max-count=UIMHIR    stop i ndiaidh UIMHIR líne chomhoiriúnach\n"
+"  -b, --byte-offset         taispeáin an fritháireamh birt san aschur\n"
+"  -n, --line-number         taispeáin líne-uimhreacha san aschur\n"
+"      --line-buffered       sruthlú an aschuir i ndiaidh gach líne\n"
+"  -H, --with-filename       taispeáin ainm comhaid le línte comhoiriúnacha\n"
+"  -h, --no-filename         ná taispeáin ainmneacha comhad mar réimír\n"
+"      --label=LIPÉAD        úsáid LIPÉAD mar ainm ar an ngnáth-ionchur\n"
+
+#: src/grep.c:2007
+#, fuzzy, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       ná taispeáin ach an teaghrán comhoiriúnach\n"
+"  -q, --quiet, --silent     múch an gnáth-aschur\n"
+"      --binary-files=CINEÁL glac le comhaid dhénártha mar CINEÁL;\n"
+"                            CINEÁL = 'binary', 'text', nó 'without-match'\n"
+"  -a, --text                ar comhbhrí le '--binary-files=text'\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        ar comhbhrí le '--binary-files=without-match'\n"
+"  -d, --directories=MODH    modh oibre le haghaidh comhadlanna;\n"
+"                            MODH = 'read', 'recurse', nó 'skip'\n"
+"  -D, --devices=MODH        modh oibre le haghaidh gléasanna, FIFOnna,\n"
+"                              agus soicéid; MODH = 'read' nó 'skip'\n"
+"  -r, --recursive           ar comhbhrí le '--directories=recurse'\n"
+"  -R, --dereference-recursive  mar an gcéanna, ach lean naisc shiombalacha\n"
+
+#: src/grep.c:2023
+#, fuzzy, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=PATRÚN      déan cuardach i gcomhaid chomhoiriúnacha amháin\n"
+"      --exclude=PATRÚN      ná déan cuardach i gcomhaid chomhoiriúnacha\n"
+"      --exclude-from=COMHAD ná déan cuardach i gcomhaid atá comhoiriúnach "
+"le\n"
+"                              haon phatrún i gCOMHAD\n"
+"      --exclude-dir=PATRÚN  ná déan cuardach i gcomhadlanna comhoiriúnacha.\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match ná taispeáin ach ainmneacha comhaid GAN\n"
+"                              teaghrán comhoiriúnach\n"
+"  -l, --files-with-matches  ná taispeáin ach ainmneacha comhaid LE\n"
+"                              teaghrán comhoiriúnach\n"
+"  -c, --count               ná taispeáin ach líon na dteaghrán "
+"comhoiriúnach\n"
+"                              i ngach comhad\n"
+"  -T, --initial-tab         Ailínigh na táib (más gá)\n"
+"  -Z, --null                priontáil beart '0' i ndiaidh ainm an chomhaid\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Rialú comhthéacs:\n"
+"  -B, --before-context=UIMH taispeáin UIMH líne de chomhthéacs tosaigh\n"
+"  -A, --after-context=UIMH  taispeáin UIMH líne de chomhthéacs deiridh\n"
+"  -C, --context=UIMHIR      taispeáin UIMHIR líne de chomhthéacs\n"
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -UIMHIR                   ar comhbhrí le --context=UIMHIR\n"
+"      --color[=CATHAIN],\n"
+"      --colour[=CATHAIN]    aibhsigh na teaghráin chomhoiriúnacha;\n"
+"                            CATHAIN = 'always', 'never' nó 'auto'\n"
+"  -U, --binary              ná scrios carachtair CR (MSDOS/Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, fuzzy, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Más é '-' an COMHAD, léigh ón ionchur caighdeánach. Gan COMHAD ar bith,\n"
+"léigh . má tá an rogha -r ann, agus - mura bhfuil. Má tá níos lú ná dhá\n"
+"chomhad ann, úsáid '-h'. Stádas scortha: 0 má roghnaíodh líne ar bith,\n"
+"1 murar roghnaíodh, agus 2 má tharlaíonn earráid ar bith gan rogha -q.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "sonraíodh patrúin chontrártha"
+
+#: src/grep.c:2101
+#, fuzzy
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"Tiomsaíodh an clár dénártha seo le --disable-perl-regexp agus gan tacaíocht "
+"do rogha -P"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "meaitseálaí neamhbhailí %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "modh anaithnid gléasanna"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "uasmhéid neamhbhailí"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "cineál anaithnid de chomhad dénártha"
+
+#: src/grep.c:2829
+#, fuzzy
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"agus daoine eile, féach ar <http://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>"
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "níorbh fhéidir cuimhne a dháil le haghaidh na cruaiche PCRE JIT"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "Tacaíonn an rogha -P logchaighdeáin aonbhearta agus UTF-8 amháin"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "Ní thacaíonn rogha -P ach le patrún amháin"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "earráid inmheánach (ní tharlaíonn seo riamh)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "sáraíodh uasfhad líne PCRE"
+
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "cuimhne ídithe"
+
+#: src/pcresearch.c:310
+#, fuzzy, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "cruach PCRE JIT líonta"
+
+#: src/pcresearch.c:315
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "sáraíodh teorainn PCRE ar chúlú"
+
+#: src/pcresearch.c:319
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "sáraíodh teorainn PCRE ar chúlú"
+
+#: src/pcresearch.c:327
+#, fuzzy, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "earráid inmheánach PCRE: %d"
+
+#, c-format
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr ""
+#~ "rabhadh: ní mholtar GREP_OPTIONS a úsáid a thuilleadh; bain úsáid as "
+#~ "ailias nó as script"
+
+#, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "rabhadh: %s: %s"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "argóint neamhbhailí %s%s '%s'"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "iarmhír neamhbhailí tar éis argóint %s%s '%s'"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "argóint %s%s rómhór: '%s'"
+
+#, fuzzy
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "Leathanach baile %s: <http://www.gnu.org/software/%s/>\n"
+
+#~ msgid "internal error"
+#~ msgstr "earráid inmheánach"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: ní cheadaítear argóint i ndiaidh rogha '--%s'\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: rogha anaithnid '--%s'\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: tá an rogha '-W %s' débhríoch\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: ní cheadaítear argóint i ndiaidh rogha '-W %s'\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: tá argóint de dhíth i ndiaidh rogha '-W %s'\n"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr ""
+#~ "Is slonn ionadaíochta bunúsach (BRE) é PATRÚN, de réir réamhshocraithe.\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "'egrep' = 'grep -E', agus 'fgrep' = 'grep -F'.\n"
+#~ "Tá na horduithe 'egrep' agus 'fgrep' imithe i léig.\n"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "Tá líon na hathráite neamhiomlán"
+
+# more precisely, "the string indicating the repeat count" is malformed -- KPS
+#~ msgid "malformed repeat count"
+#~ msgstr "Tá líon na hathráite míchumtha"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "Is slonn ionadaíochta feabhsaithe (ERE) é PATRÚN.\n"
+
+#~ msgid "Invocation as `egrep' is deprecated; use `grep -E' instead.\n"
+#~ msgstr "Tá an t-ordú `egrep' imithe i léig; úsáid `grep -E' ina ionad.\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr "Is tacar teaghrán é PATRÚN, scartha le línte nua.\n"
+
+#~ msgid "Invocation as `fgrep' is deprecated; use `grep -F' instead.\n"
+#~ msgstr "Tá an t-ordú `fgrep' imithe i léig; úsáid `grep -F' ina ionad.\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "theip ar lseek"
+
+#~ msgid "writing output"
+#~ msgstr "aschur á scríobh"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "Leathanach baile GNU Grep: <%s>\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "Ní féidir le %s ach comhréir phatrúin %s a úsáid"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity needs a value (\"=...\"); "
+#~ "skipped"
+#~ msgstr ""
+#~ "I GREP_COLORS=\"%s\", tá luach (\"=...\") de dhíth i ndiaidh acmhainn \"%s"
+#~ "\"; rinneadh neamhaird de."
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity is boolean and cannot take a "
+#~ "value (\"=%s\"); skipped"
+#~ msgstr ""
+#~ "I GREP_COLORS=\"%s\", is den chineál boole é an acmhainn \"%s\" agus ní "
+#~ "cheadaítear luach (\"=%s\") ina dhiaidh; rinneadh neamhaird de."
+
+#~ msgid "in GREP_COLORS=\"%s\", the \"%s\" capacity %s"
+#~ msgstr "I GREP_COLORS=\"%s\", an acmhainn \"%s\": %s"
+
+#~ msgid ""
+#~ "stopped processing of ill-formed GREP_COLORS=\"%s\" at remaining "
+#~ "substring \"%s\""
+#~ msgstr ""
+#~ "Scoireadh ó phróiseáil teaghrán míchumtha GREP_COLORS=\"%s\" ag an "
+#~ "bhfotheaghrán atá fágtha: \"%s\""
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE;\n"
+#~ "                            TYPE is `binary', `text', or `without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories;\n"
+#~ "                            ACTION is `read', `recurse', or `skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+#~ "                            ACTION is `read' or `skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=FILE_PATTERN  search only files that match FILE_PATTERN\n"
+#~ "      --exclude=FILE_PATTERN  skip files and directories matching "
+#~ "FILE_PATTERN\n"
+#~ "      --exclude-from=FILE   skip files matching any file pattern from "
+#~ "FILE\n"
+#~ "      --exclude-dir=PATTERN directories that match PATTERN will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match print only names of FILEs containing no "
+#~ "match\n"
+#~ "  -l, --files-with-matches  print only names of FILEs containing matches\n"
+#~ "  -c, --count               print only a count of matching lines per "
+#~ "FILE\n"
+#~ "  -T, --initial-tab         make tabs line up (if needed)\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Rialú aschurtha:\n"
+#~ "  -m, --max-count=UIMHIR    stop i ndiaidh UIMHIR líne comhoiriúnach\n"
+#~ "  -b, --byte-offset         taispeáin an fritháireamh birt san aschur\n"
+#~ "  -n, --line-number         taispeáin líne-uimhreacha san aschur\n"
+#~ "      --line-buffered       déan sruthlú an aschuir i ndiaidh gach líne\n"
+#~ "  -H, --with-filename       taispeáin ainm comhaid le línte "
+#~ "comhoiriúnacha\n"
+#~ "  -h, --no-filename         ná taispeáin ainmneacha comhad\n"
+#~ "      --label=LIPÉAD        úsáid LIPÉAD mar ainm ar an ngnáth-ionchur\n"
+#~ "  -o, --only-matching       ná taispeáin ach an teaghrán comhoiriúnach\n"
+#~ "  -q, --quiet, --silent     múch an gnáth-aschur\n"
+#~ "      --binary-files=CINEÁL glac le comhaid dhénártha mar CINEÁL;\n"
+#~ "                            CINEÁL = 'binary', 'text', nó 'without-"
+#~ "match'\n"
+#~ "  -a, --text                ar comhbhrí le '--binary-files=text'\n"
+#~ "  -I                        ar comhbhrí le '--binary-files=without-"
+#~ "match'\n"
+#~ "  -d, --directories=MODH    modh oibre le haghaidh comhadlanna\n"
+#~ "                            MODH = 'read', 'recurse', nó 'skip'\n"
+#~ "  -D, --devices=MODH        modh oibre le haghaidh gléasanna, FIFOnna,\n"
+#~ "                              agus soicéid; MODH = 'read' nó 'skip'\n"
+#~ "  -R, -r, --recursive       ar comhbhrí le '--directories=recurse'\n"
+#~ "      --include=PATRÚN      déan cuardach i gcomhaid chomhoiriúnacha "
+#~ "amháin\n"
+#~ "      --exclude=PATRÚN      ná déan cuardach i gcomhaid chomhoiriúnacha\n"
+#~ "      --exclude-from=COMHAD ná déan cuardach i gcomhaid atá comhoiriúnach "
+#~ "le\n"
+#~ "                              haon phatrún i gCOMHAD\n"
+#~ "      --exclude-dir=PATRÚN  ná déan cuardach i gcomhadlanna "
+#~ "comhoiriúnacha.\n"
+#~ "  -L, --files-without-match ná taispeáin ach ainmneacha comhaid GAN\n"
+#~ "                              teaghrán comhoiriúnach\n"
+#~ "  -l, --files-with-matches  ná taispeáin ach ainmneacha comhaid LE\n"
+#~ "                              teaghrán comhoiriúnach\n"
+#~ "  -c, --count               ná taispeáin ach líon na teaghráin "
+#~ "chomhoiriúnacha\n"
+#~ "                              atá i ngach comhad\n"
+#~ "  -T, --initial-tab         Ailínigh na táib (más gá)\n"
+#~ "  -Z, --null                priontáil beart '0' i ndiaidh an ainm "
+#~ "comhaid\n"
+
+#~ msgid "unknown directories method"
+#~ msgstr "modh anaithnid comhadlann"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "Tá na roghanna -P agus -z neamh-chomhoiriúnach le chéile"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: rogha neamhcheadaithe -- %c\n"
+
+#~ msgid "Copyright (C) 2008 Free Software Foundation, Inc.\n"
+#~ msgstr "Copyright © 2008 Free Software Foundation, Inc.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions.  There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "Is saorbhogearra an ríomhchlár seo; féach ar an mbunchód le haghaidh\n"
+#~ "coinníollacha cóipeála.  Níl baránta ar bith ann; go fiú níl baránta ann\n"
+#~ "d'INDÍOLTACHT nó FEILIÚNACHT D'FHEIDHM AR LEITH.\n"
+
+#~ msgid "out of memory"
+#~ msgstr "cuimhne ídithe"
+
+#~ msgid "Usage: %s [OPTION]... PATTERN [FILE] ...\n"
+#~ msgstr "Úsáid: %s [ROGHA]... PATRÚN [COMHAD] ...\n"
+
+#~ msgid "%s (GNU grep) %s\n"
+#~ msgstr "%s (GNU grep) %s\n"
diff --git a/src/grep/po/gl.gmo b/src/grep/po/gl.gmo
new file mode 100644
index 0000000..e3151db
--- /dev/null
+++ b/src/grep/po/gl.gmo
diff --git a/src/grep/po/gl.po b/src/grep/po/gl.po
new file mode 100644
index 0000000..5fbe805
--- /dev/null
+++ b/src/grep/po/gl.po
@@ -0,0 +1,1000 @@
+# Galician Translation of grep
+# Copyright (C) 2001 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Jacobo Tarrío Barreiro <jtarrio@iname.com>, 2001.
+# Francisco Diéguez <frandieguez@ubuntu.com>, 2012.
+# Leandro Regueiro <leandro.regueiro@gmail.com>, 2012.
+# Antón Méixome <meixome@certima.net>, 2018.
+# Francisco Javier Tsao Santín <tsao@members.fsf.org>, 2020.
+# Proxecto Trasno - Adaptación do software libre á lingua galega:  Se desexas
+# colaborar connosco, podes atopar máis información en <http://trasno.gal>
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 3.5.16\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2020-11-09 12:44+0100\n"
+"Last-Translator: Francisco Javier Tsao Santín <tsao@members.fsf.org>\n"
+"Language-Team: Galician <proxecto@trasno.gal>\n"
+"Language: gl\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+"X-Generator: Virtaal 0.7.1\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "o argumento %s para %s é incorrecto"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "o argumento %s para %s é ambiguo"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Os argumentos correctos son:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "erro de programa"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "desbordamento de pila"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "erro de escritura"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "[ desemparellado"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "clase de caracteres incorrecta"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "a sintaxe da clase de caracteres é [[:space:]], non [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "secuencia de escape \\ sen rematar"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "contido incorrecto de \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "expresión regular demasiado grande"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "( desemparellado"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "no se especificou ningunha sintaxe"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr ") desemparellado"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Erro do sistema descoñecido"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: a opción '%s%s' é ambigua\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: a opción '%s%s' é ambigüa; posibilidades:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: non se recoñece a opción '%s%s'\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: a opción '%s%s' non admite ningún argumento\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: a opción '%s%s' require un argumento\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: a opción -- '%c' non é correcta\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: a opción require un argumento -- '%c'\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "memoria esgotada"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "non se puido rexistrar o cartafol de traballo activo"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "produciuse un fallo ao volver ao cartafol de traballo inicial"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "produciuse un fallo ao configurar o modo do descritor texto/binario"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "«"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "»"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Correcto"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "No hai ningunha coincidencia"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Expresión regular incorrecta"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Carácter de unión incorrecto"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Nome de clase de caracteres incorrecto"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Barra invertida ao final"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Referencia cara atrás incorrecta"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "[, [^, [:, [., ou [= desemparellado"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "( ou \\( desemparellado"
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "\\{ desemparellado"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Contido incorrecto \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Final de intervalo incorrecto"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Memoria esgotada"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "A expresión regular precedente é incorrecta"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Final prematuro da expresión regular"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "A expresión regular é demasiado grande"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ") ou \\) desemparellado"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "No hai ningunha expresión regular anterior"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Empaquetado por %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Empaquetado por %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Licenza GPLv3+: GPL de GNU versión 3 ou posterior <%s>.\n"
+"Isto é software libre: vostede é libre de modificalo e redistribuílo.\n"
+"Non hai NINGUNHA GARANTÍA, ata onde o permite a lei.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Escrito por %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Escrito por %s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Escrito por %s, %s, e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, %s, e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, e outros.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "Comunicar erros no programa en: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Comunicar %s erros de programa en: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Páxina de web de %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Axuda xeral sobre o uso de software de GNU: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(entrada estándar)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "argumento de lonxitude do contexto incorrecto"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "a entrada é longa de máis para facer a conta"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: coincide o ficheiro binario"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: aviso: ciclo de cartafoles recursivo"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: o ficheiro de entrada tamén é o de saída"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Uso: %s [OPCIÓN]... PATRÓNS [FICHEIRO]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Consulte con '%s --help' para máis información.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Busca PATRÓNS en cada FICHERO.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Exemplo: %s -i 'hello world' menu.h main.c\n"
+"\n"
+"Selección de patróns e interpretación:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     O PATRÓNS son expresións regulares estendidas\n"
+"  -F, --fixed-strings       O PATRÓNS son conxuntos de cadeas\n"
+"  -G, --basic-regexp        O PATRÓNS son expresións regulares básicas\n"
+"  -P, --perl-regexp         O PATRÓNS son expresións regulares en Perl\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=PATRÓN       utiliza PATRÓNS para atopar coincidencias\n"
+"  -f, --file=FICHEIRO       obtén PATRÓNS de FICHEIRO\n"
+"  -i, --ignore-case         considera iguais as maiúsculas e as minúsculas "
+"en patróns e datos\n"
+"      --no-ignore-case      non considera iguais as maiúsculas e as "
+"minúsculas (por defecto)\n"
+"  -w, --word-regexp         obriga a que coincida só con palabras completas\n"
+"  -x, --line-regexp         obriga a que coincida só con liñas completas\n"
+"  -z, --null-data           unha liña de datos termina nun byte 0, non nun "
+"carácter de nova liña\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Variadas:\n"
+"  -s, --no-messages         suprime as mensaxes de erro\n"
+"  -v, --invert-match        selecciona as liñas que non coinciden\n"
+"  -V, --version             amosa a versión e finaliza\n"
+"      --help                amosa esta axuda e finaliza\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Control da saída como resultado:\n"
+"  -m, --max-count=NUM       detense despois do NUM de liñas seleccionadas\n"
+"  -b, --byte-offset         amosa o desprazamento en bytes xunto coas liñas "
+"de saí­da\n"
+"  -n, --line-number         amosa o número de liña xunto coas liñas de saí­"
+"da\n"
+"      --line-buffered       descarga o resultado para cada liña\n"
+"  -H, --with-filename       amosa o nome do ficheiro de cada coincidencia\n"
+"  -h, --no-filename         suprime os nomes dos ficheiros como prefixo no "
+"resultado\n"
+"      --label=ETIQUETA      utiliza ETIQUETA como prefixo estándar do nome "
+"de ficheiro\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       amosa só partes non baleiras de liñas que "
+"coinciden\n"
+"  -q, --quiet, --silent     suprime todo o resultado normal\n"
+"      --binary-files=TIPO   supón que os ficheros binarios son de TIPO;\n"
+"                            TIPO é 'binary', 'text', ou 'without-match'\n"
+"  -a, --text                equivalente a --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        equivalente a --binary-files=sen-coincidencia\n"
+"  -d, --directories=ACCIÓN  especifica como manexar os cartafoles\n"
+"                            ACCIÓN pode ser 'read', 'recurse', ou 'skip'\n"
+"  -D, --devices=ACCIÓN      especifica como manexar dispositivos, FIFO e\n"
+"                            «sockets», pode ser 'read' ou 'skip'\n"
+"  -r, --recursive           equivalente a --directories=recurse\n"
+"  -R, --dereference-recursive  equivalente, pero seguindo tódolas ligazóns "
+"simbólicas\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=PATRÓN_FICHEIRO  busca só os ficheiros que coinciden con "
+"PATRÓN_FICHEIRO\n"
+"      --exclude=PATRÓN_FICHEIRO  omítense os ficheiros e cartafoles que "
+"coinciden con PATRÓN_FICHEIRO\n"
+"      --exclude-from=FICHEIRO    omítense os ficheiros que coinciden con "
+"calquera patrón de ficheiro de FICHEIRO\n"
+"      --exclude-dir=PATRÓN       omítense os cartafoles que coinciden con "
+"PATRÓN\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match amosa só os nomes dos FICHEIROS que no conteñen "
+"ningunha coincidencia\n"
+"  -l, --files-with-matches  amosa só os nomes de FICHEIROS que conteñen "
+"algunha coincidencia\n"
+"  -c, --count               amosa só resultado de liñas que coinciden de "
+"cada FICHEIRO\n"
+"  -Z, --null                imprime un byte 0 despois do nome do FICHEIRO\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Control do contexto:\n"
+"  -B, --before-context=NÚM  amosa o NÚM de liñas de contexto anterior\n"
+"  -A, --after-context=NÚM   amosa o NÚM de liñas de contexto posterior\n"
+"  -C, --context=NÚM         amosa o NÚM liñas de contexto\n"
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NUM                      o mesmo que --context=NUM\n"
+"      --color[=CANDO],\n"
+"      --colour[=CANDO]      distingue con marcadores a cadea que encaixa;\n"
+"                            CANDO pode ser 'always', 'never', ou 'auto'.\n"
+"  -U, --binary              non elimina os caracteres CR de retorno de liña "
+"(MSDOS/Windows)\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Cando o FICHEIRO é '-', le a entrada estándard. De non especificar FICHEIRO, "
+"le '.'\n"
+"se é recursivo, doutra maneira '-'. De se dar menos de dous FICHEIROS, "
+"suponse -h.\n"
+"O estado de saída é 0 se algunha liña é elixida, 1 se non as hai;\n"
+"de se producir algún  erro e asemade non se especificou -q,\n"
+"o estado de saída é 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "especificáronse expresións conflitivas"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"A coincidencia compatible con Perl non está soportada nun compilado --"
+"disable-perl-regexp"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "a expresión %s non é correcta"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "método de dispositivos descoñecido"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "contador máximo incorrecto"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "tipo binary-files descoñecido"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Escrito por Mike Haertel e outros, véxase\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>"
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "ao tentar dispoñer de memoria produciuse un erro para a pila PCRE JIT"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P admite só locales unibyte e UTF-8"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "a opción -P admite só un patrón"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "erro interno (non debería ocorrer nunca)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "excedeuse o tamaño límite das liñas PCRE"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: memoria esgotada"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: esgotouse a pila PCRE JIT"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: excedeuse o límite de volta atrás das PCREs"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: excedeuse o límite de recursividade das PCREs"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: erro interno de PCRE: %d"
+
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr "aviso: GREP_OPTIONS está obsoleto; utilice un alias ou un script"
+
+#~ msgid "%s home page: <http://www.gnu.org/software/%s/>\n"
+#~ msgstr "Páxina de web de %s: <http://www.gnu.org/software/%s/>\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "argumento %s%s incorrect '%s'"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "sufixo incorrecto no %s%s argumento «%s»"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "%s%s argumento «%s» demasiado grande"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "warning: %s: %s"
+#~ msgstr "atención: %s: %s"
+
+#~ msgid "internal error"
+#~ msgstr "erro interno"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: a opción '--%s' non admite ningíºn argumento\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: opción non recoñecida '--%s'\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: a opción '-W %s' non admite ningíºn argumento\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: a opción '-W %s' require un argumento\n"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "contador de repetición sen rematar"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "contador de repetición erróneo"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "PATRÓN é una expresión regular estendida (ERE).\n"
+
+#~ msgid "Invocation as `egrep' is deprecated; use `grep -E' instead.\n"
+#~ msgstr ""
+#~ "A invocación como `egrep' está obsoleta; utilice `grep -E' no seu lugar.\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr "PATRÓN é un conxunto de cadenas fixas separadas por nova liña\n"
+
+#~ msgid "Invocation as `fgrep' is deprecated; use `grep -F' instead.\n"
+#~ msgstr ""
+#~ "A invocación como `fgrep' está obsoleta; utilice `grep -F' no seu lugar.\n"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "PATRÓN é, por omisión, unha expresión regular básica (BRE).\n"
+
+#~ msgid ""
+#~ "`egrep' means `grep -E'.  `fgrep' means `grep -F'.\n"
+#~ "Direct invocation as either `egrep' or `fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "`egrep' significa `grep -E'.  `fgrep' significa `grep -F'.\n"
+#~ "A invocación directa como `egrep' ou `fgrep' está obsoleta.\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "fallou a chamada ao sistema `lskeek'"
+
+#~ msgid "writing output"
+#~ msgstr "escribiendo o resultado"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "Páxina web de GNU grep: <%s>\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s só puede usar a sintaxe de patrón %s"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity needs a value (\"=...\"); "
+#~ "skipped"
+#~ msgstr ""
+#~ "en GREP_COLORS=\"%s\", a capacidad \"%s\" necesita un valor (\"=...\"); "
+#~ "omitido."
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity is boolean and cannot take a "
+#~ "value (\"=%s\"); skipped"
+#~ msgstr ""
+#~ "en GREP_COLORS=\"%s\", a capacidad \"%s\" é booleana e non pode tener un "
+#~ "valor (\"=%s\"); omitido."
+
+#~ msgid "in GREP_COLORS=\"%s\", the \"%s\" capacity %s"
+#~ msgstr "en GREP_COLORS=\"%s\", a capacidade \"%s\" %s."
+
+#~ msgid ""
+#~ "stopped processing of ill-formed GREP_COLORS=\"%s\" at remaining "
+#~ "substring \"%s\""
+#~ msgstr ""
+#~ "o proceso do erróneo GREP_COLORS=\"%s\" detí­vose na subcadena \"%s\"."
+
+#~ msgid "out of memory"
+#~ msgstr "memoria esgotada"
+
+#~ msgid "Usage: %s [OPTION]... PATTERN [FILE] ...\n"
+#~ msgstr "Emprego: %s [OPCIN]... PATRN [FICHEIRO] ...\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE\n"
+#~ "                            TYPE is 'binary', 'text', or 'without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories\n"
+#~ "                            ACTION is 'read', 'recurse', or 'skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets\n"
+#~ "                            ACTION is 'read' or 'skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=PATTERN     files that match PATTERN will be examined\n"
+#~ "      --exclude=PATTERN     files that match PATTERN will be skipped.\n"
+#~ "      --exclude-from=FILE   files that match PATTERN in FILE will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match only print FILE names containing no match\n"
+#~ "  -l, --files-with-matches  only print FILE names containing matches\n"
+#~ "  -c, --count               only print a count of matching lines per "
+#~ "FILE\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Control de sada:\n"
+#~ "  -m, --max-count=NM       parar tras NM aparicins\n"
+#~ "  -b, --byte-offset         amosa o desprazamento do byte coas lias de "
+#~ "sada\n"
+#~ "  -n, --line-number         amosa o numero de lia coas lias de sada\n"
+#~ "      --line-buffered       baleira-lo buffer de sada con cada lia\n"
+#~ "  -H, --with-filename       amosa o nome do ficheiro de cada aparicin\n"
+#~ "  -h, --no-filename         suprime o prefixo de nome de ficheiro na "
+#~ "sada\n"
+#~ "      --label=ETIQUETA      amosa-la ETIQUETA coma o nome da entrada "
+#~ "estndar\n"
+#~ "  -o, --only-matching       amosar s a parte da lia que encaixa co PATRN\n"
+#~ "  -q, --quiet, --silent     suprime toda a sada normal\n"
+#~ "      --binary-files=TIPO   supoer que os ficheiros binarios son TIPO\n"
+#~ "                            TIPO  'binary', 'text' ou 'without-match'\n"
+#~ "                            ('binario', 'texto', ou 'sen aparicins')\n"
+#~ "  -a, --text                equivalente a --binary-files=text\n"
+#~ "  -I                        equivalente a --binary-files=without-match\n"
+#~ "  -d, --directories=ACCION  como trata-los directorios\n"
+#~ "                            ACCION  'read', 'recurse', ou 'skip'.\n"
+#~ "                            ('ler', 'ascender recursivamente', ou "
+#~ "'omitir')\n"
+#~ "  -D, --devices=ACCIN      como trata-los dispositivos, FIFOs e sockets\n"
+#~ "                            ACCIN  'read' ou 'skip' ('ler' ou 'omitir')\n"
+#~ "  -R, -r, --recursive       equivalente a --directories=recurse.\n"
+#~ "      --include=PATRN      hanse examina-los ficheiros que encaixen no "
+#~ "PATRN\n"
+#~ "      --exclude=PATRN      hanse omiti-los ficheiros que encaixen no "
+#~ "PATRN\n"
+#~ "      --exclude-from=FICH   hanse omiti-los ficheiros que encaixen nos "
+#~ "patrns\n"
+#~ "                               armacenados no FICHeiro\n"
+#~ "  -L, --files-without-match s amosa os FICHEIROS sen aparicins\n"
+#~ "  -l, --files-with-matches  s amosa os FICHEIROS con aparicins\n"
+#~ "  -c, --count               s amosa o nm. de lias coincidentes por "
+#~ "FICHEIRO\n"
+#~ "  -Z, --null                producir un byte 0 tralo nome do FICHEIRO\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Report bugs to <bug-gnu-utils@gnu.org>.\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Informe dos erros no programa a <bug-gnu-utils@gnu.org>.\n"
+#~ "Informe dos erros na traduccin a <proxecto@trasno.net>.\n"
+
+#~ msgid "unknown directories method"
+#~ msgstr "mtodo de directorios descoecido"
+
+#~ msgid "%s (GNU grep) %s\n"
+#~ msgstr "%s (GNU grep) %s\n"
+
+#~ msgid ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+#~ msgstr ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions. There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "Isto  software libre; vexa o cdigo funte polas condicins de copia. NON "
+#~ "HAI\n"
+#~ "garanta; nin sequera de COMERCIABILIDADE ou APTITUDE PARA UN FIN "
+#~ "PARTICULAR.\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "As opcins -P e -z non se poden combinar"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: opcin non permitida -- %c\n"
+
+#~ msgid "option %s"
+#~ msgstr "opcin %s"
+
+#~ msgid " with arg %s"
+#~ msgstr " con arg %s"
+
+#~ msgid "digits occur in two different argv-elements.\n"
+#~ msgstr "dixitos aparecen en dous argv-elementos diferentes.\n"
+
+#~ msgid "option %c\n"
+#~ msgstr "opcin %c\n"
+
+#~ msgid "option a\n"
+#~ msgstr "opcin a\n"
+
+#~ msgid "option b\n"
+#~ msgstr "opcin b\n"
+
+#~ msgid "option c with value `%s'\n"
+#~ msgstr "opcin c con valor `%s'\n"
+
+#~ msgid "option d with value `%s'\n"
+#~ msgstr "opcin d con valor `%s'\n"
+
+#~ msgid "?? getopt returned character code 0%o ??\n"
+#~ msgstr "?? getopt devolveu o cdigo de caracter 0%o ??\n"
+
+#~ msgid "non-option ARGV-elements: "
+#~ msgstr "ARGV-elementos no-opcin: "
+
+#~ msgid "you may specify only one of -E, -F, or -G"
+#~ msgstr "Debes especificar s un de -E, -F, ou -G"
+
+#~ msgid "memory exhausted\n"
+#~ msgstr "memoria esgotada\n"
diff --git a/src/grep/po/grep.pot b/src/grep/po/grep.pot
new file mode 100644
index 0000000..8b04c87
--- /dev/null
+++ b/src/grep/po/grep.pot
@@ -0,0 +1,636 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR Free Software Foundation, Inc.
+# This file is distributed under the same license as the GNU grep package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: GNU grep 3.7\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=CHARSET\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr ""
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr ""
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr ""
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr ""
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr ""
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr ""
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr ""
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr ""
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr ""
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr ""
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr ""
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr ""
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr ""
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr ""
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr ""
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr ""
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr ""
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr ""
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr ""
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr ""
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr ""
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr ""
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr ""
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr ""
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr ""
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr ""
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr ""
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr ""
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr ""
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr ""
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr ""
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr ""
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr ""
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr ""
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr ""
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr ""
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr ""
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr ""
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr ""
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr ""
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr ""
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr ""
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr ""
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr ""
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr ""
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ""
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr ""
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr ""
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr ""
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr ""
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr ""
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr ""
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr ""
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr ""
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr ""
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr ""
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr ""
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr ""
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr ""
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr ""
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr ""
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr ""
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr ""
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr ""
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr ""
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr ""
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr ""
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr ""
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr ""
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr ""
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr ""
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr ""
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr ""
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr ""
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr ""
diff --git a/src/grep/po/he.gmo b/src/grep/po/he.gmo
new file mode 100644
index 0000000..d39a14d
--- /dev/null
+++ b/src/grep/po/he.gmo
diff --git a/src/grep/po/he.po b/src/grep/po/he.po
new file mode 100644
index 0000000..5484e88
--- /dev/null
+++ b/src/grep/po/he.po
@@ -0,0 +1,813 @@
+# Hebrew messages for GNU Grep
+# Copyright (C) 2002, 2005 Free Software Foundation, Inc.
+# Eli Zaretskii <eliz@gnu.org>, 2005.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 2.5.1a\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2005-03-04 14:55+0200\n"
+"Last-Translator: Eli Zaretskii <eliz@gnu.org>\n"
+"Language-Team: Hebrew <eliz@gnu.org>\n"
+"Language: he\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=ISO-8859-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr ""
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr ""
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr ""
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr ""
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr ""
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr ""
+
+#: lib/dfa.c:896
+#, fuzzy
+msgid "unbalanced ["
+msgstr "���-�� �� ���� ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr ""
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr ""
+
+#: lib/dfa.c:1210
+#, fuzzy
+msgid "unfinished \\ escape"
+msgstr "�����-���� \\ ���� ����"
+
+#: lib/dfa.c:1371
+#, fuzzy
+msgid "invalid content of \\{\\}"
+msgstr "���� ����� ����"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr ""
+
+#: lib/dfa.c:1858
+#, fuzzy
+msgid "unbalanced ("
+msgstr "���-�� �� ���� ("
+
+#: lib/dfa.c:1975
+#, fuzzy
+msgid "no syntax specified"
+msgstr "����� ����� ���"
+
+#: lib/dfa.c:1986
+#, fuzzy
+msgid "unbalanced )"
+msgstr "���-�� �� ���� )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "�����-���� ����� ����"
+
+#: lib/getopt.c:278
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s ����� ���� �����-�� ���� `%s' ������\n"
+
+#: lib/getopt.c:284
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s ����� ���� �����-�� ���� `%s' ������\n"
+
+#: lib/getopt.c:319
+#, fuzzy, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s ����� ���� `%c%s' ����-���� ������\n"
+
+#: lib/getopt.c:345
+#, fuzzy, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s ����� ���� ������� ���� ���� `%c%s' ������\n"
+
+#: lib/getopt.c:360
+#, fuzzy, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s ����� ���� ������� ����� `%s' ������\n"
+
+#: lib/getopt.c:621
+#, fuzzy, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s ����� ���� ���� ������ -- %c\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, fuzzy, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: ������� ����� ������ -- %c\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "������ ����"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr ""
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr ""
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr ""
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "`"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "'"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr ""
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr ""
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr ""
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr ""
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr ""
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr ""
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr ""
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr ""
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr ""
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr ""
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr ""
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr ""
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "������ ����"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr ""
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr ""
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr ""
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ""
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr ""
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr ""
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr ""
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr ""
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, fuzzy, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"\n"
+".<bug-grep@gnu.org> ������ ���� ������ ����� ��\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr ""
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr ""
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr ""
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(���� ��� ����)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "����� ���� ���� �� ����� �����"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "����� ���� ���� ���"
+
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "������ ������ ���� %s ������ ����\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "������ ������� �����"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr ""
+
+#: src/grep.c:1961 src/grep.c:1968
+#, fuzzy, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "%s [��������]... PATTERN [����]  :������ ����\n"
+
+#: src/grep.c:1963
+#, fuzzy, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr ".���� �� ���� ����� `%s --help' ���\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr ""
+
+#: src/grep.c:1970
+#, fuzzy, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"                .���� ���� �� ,������ ������� ��� ��� ������ ������ ���\n"
+"                     %s -i 'hello world' menu.h main.c :�����\n"
+"\n"
+"                                        :��������� ������� ������ �����\n"
+
+#: src/grep.c:1975
+#, fuzzy, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"                  ����� ������ ����� ��� PATTERN   -E, --extended-regexp\n"
+"     newline �\"� �������� �������� ����� PATTERN   -F, --fixed-strings\n"
+"                  ����� ������ ����� ��� PATTERN   -E, --extended-regexp\n"
+"            Perl ������ ������ ����� ��� PATTERN   -P, --perl-regexp\n"
+
+#: src/grep.c:1981
+#, fuzzy, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"               PATTERN-� ���� ������ ����� �����   -e, --regexp=PATTERN\n"
+"            FILE ���� ���� PATTERN ������ �� ���   -f, --file=FILE\n"
+"          ������ ������ ������ ��� ������� �����   -i, --ignore-case\n"
+"            ����� ����� ��� �� ������ PATTERN ��   -w, --word-regexp\n"
+"           ����� ������ ��� �� ������ PATTERN ��   -x, --line-regexp\n"
+"           newline-� �� ,0-���� ������� ��� ����   -z, --null-data\n"
+
+#: src/grep.c:1989
+#, fuzzy, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"                                                           :������ ��������\n"
+"                             ���� ������ ���� ��   -s, --no-messages\n"
+"               PATTERN-� ������� ����� ����� ���   -v, --invert-match\n"
+"                   ��� ������� ����� �� ���� ���   -V, --version\n"
+"                     ������� ��� �� ���� ��� ���       --help\n"
+"    ������ ������ ��� ���� ������ ����� ,���� ��       --mmap\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"\n"
+"                                                             :���� �� �����\n"
+"         ������ ����� ���� ���� �� ����� NUM ���   -B, --before-context=NUM\n"
+"         ������ ����� ���� ���� �� ����� NUM ���   -A, --after-context=NUM\n"
+"   ������ ����� ����� ���� ���� �� ����� NUM ���   -C, --context=NUM\n"
+"                        --context=NUM-� ���-����   -NUM\n"
+"                                                       --color[=WHEN],\n"
+"             ������ ������� ������ ��� ����� ���       --colour[=WHEN]\n"
+"    `auto' �� ,`never' ,`always' ����� ���� WHEN\n"
+"                (MSDOS) ���� ���� CR ��� ���� ��   -U, --binary\n"
+" (MSDOS)  ������ ��� �� CR ��� ����� ������ ����   -u, --unix-byte-offsets\n"
+"\n"
+"                        .`grep -F' ����� `fgrep' .`grep -E' ����� `egrep'\n"
+"            .���� ��� ����� ���� ,- ��� ����� �� �� �� ,��� ���� ���� ���\n"
+"                                     .-h ����� ,����� ���� ���� ������ ��\n"
+"       .����� �� ����� 2 ,����� �� �� 1 ,������ ����� �� 0 ���� ����� ���\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "������ ���� �� ������ ������"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+
+#: src/grep.c:2103
+#, fuzzy, c-format
+msgid "invalid matcher %s"
+msgstr "���� ����� ����"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "������� ������ �����-���� ����"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "���� ����� ����"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "�������� ������ ������ �����-���� ����"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr ""
+
+#: src/pcresearch.c:143
+#, fuzzy
+msgid "the -P option only supports a single pattern"
+msgstr "-P ������� ����� ���"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr ""
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr ""
+
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "������ ����"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr ""
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr ""
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr ""
+
+#, fuzzy, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "%s %s :�����\n"
+
+#, fuzzy
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s ����� ���� ������� ���� ���� `--%s' ������\n"
+
+#, fuzzy
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s ����� ���� `--%s' ����-���� ������\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s ����� ���� �����-�� ���� `-W %s' ������\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s ����� ���� ������� ���� ���� `-W %s' ������\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s ����� ���� ������� ����� `%s' ������\n"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "�����-���� ������ ���� �����"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "������ ���� ������ ���� �����"
+
+#~ msgid "out of memory"
+#~ msgstr "������ ����"
+
+#~ msgid "writing output"
+#~ msgstr "(��� ����� ��� ����)"
+
+#~ msgid "Usage: %s [OPTION]... PATTERN [FILE] ...\n"
+#~ msgstr "%s [��������]... PATTERN [����]  :������ ����\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE\n"
+#~ "                            TYPE is 'binary', 'text', or 'without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories\n"
+#~ "                            ACTION is 'read', 'recurse', or 'skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets\n"
+#~ "                            ACTION is 'read' or 'skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=PATTERN     files that match PATTERN will be examined\n"
+#~ "      --exclude=PATTERN     files that match PATTERN will be skipped.\n"
+#~ "      --exclude-from=FILE   files that match PATTERN in FILE will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match only print FILE names containing no match\n"
+#~ "  -l, --files-with-matches  only print FILE names containing matches\n"
+#~ "  -c, --count               only print a count of matching lines per "
+#~ "FILE\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "                                                              :��� �� "
+#~ "�����\n"
+#~ "                ������� ����� NUM ���� ���� ����   -m, --max-count=NUM\n"
+#~ "                   ��� ���� �� �� ����� ���� ���   -b, --byte-offset\n"
+#~ "                      ��� ����� �� ���� ���� ���   -n, --line-number\n"
+#~ "                      ���� �� ���� ��� ���� ����       --line-buffered\n"
+#~ "                   ����� �� ����� �� ���� �� ���   -H, --with-filename\n"
+#~ "                         ���� ����� ���� ���� ��   -h, --no-filename\n"
+#~ "    ����� ��� LABEL ��� ,���� ��� ����� ��� ����       --label=LABEL\n"
+#~ "             ������ �� ����� ����� ��� �� �� ���   -o, --only-matching\n"
+#~ "                     ������� ���� ���� �� �� ���   -q, --quiet, --silent\n"
+#~ "                        �������� ����� ���� ����       --binary-"
+#~ "files=HOW\n"
+#~ "'without-match' ,'text' ,'binary' ����� ���� HOW\n"
+#~ "                  --binary-files=text-� ���-����   -a, --text\n"
+#~ "         --binary-files=without-match-� ���-����   -I\n"
+#~ "                                ������ ���� ����   -d, --directories=HOW\n"
+#~ "     'skip' �� ,'recurse' ,'read' ����� ���� HOW\n"
+#~ "                                ������ ���� ����   -D, --devices=HOW\n"
+#~ "                 'skip' �� 'read' ����� ���� HOW\n"
+#~ "                --directories=recurse-� ���-����   -R, -r, --recursive\n"
+#~ "              PATTERN ������ �������� ������ ���       --include=PATTERN\n"
+#~ "            PATTERN ������ �������� ����� �� ���       --exclude=PATTERN\n"
+#~ "             PATTERN ������� FILE-� ����� �� ���       --exclude-"
+#~ "from=FILE\n"
+#~ "        ��� ����� �� ���� �� ���� ����� ���� ���   -L, --files-without-"
+#~ "match\n"
+#~ "            ������ ��� ��� ������ ���� �� �� ���   -l, --files-with-"
+#~ "matches\n"
+#~ "          ���� ��� ������� ������ ���� �� �� ���   -c, --count\n"
+#~ "                          0 ���� ���� �� �� ����   -Z, --null\n"
+
+#~ msgid "unknown directories method"
+#~ msgstr "������� ������ �����-���� ����"
+
+#~ msgid "%s (GNU grep) %s\n"
+#~ msgstr "%s (GNU grep) %s\n"
+
+#~ msgid ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+#~ msgstr ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions. There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "��� ��� �� ����� .���� ����� ���� ,����� ������� ;����� ���� ���� �� "
+#~ "����\n"
+#~ "   .������ ����� ����� ����� �� ������ ��� ������-������ �� ����� ;"
+#~ "������\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "�� �� �� ������ -z-� -P ��������"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: ����-���� ������ -- %c\n"
diff --git a/src/grep/po/hr.gmo b/src/grep/po/hr.gmo
new file mode 100644
index 0000000..b1106eb
--- /dev/null
+++ b/src/grep/po/hr.gmo
diff --git a/src/grep/po/hr.po b/src/grep/po/hr.po
new file mode 100644
index 0000000..c133fb0
--- /dev/null
+++ b/src/grep/po/hr.po
@@ -0,0 +1,976 @@
+# The Croatian translation of grep.
+# Copyright © 2016 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+#
+# bp, nekoliko noticija
+# ovo je ista verzija grep.po kao 2012. od TK. Samo je nekoliko riječi
+# izmjenjeno. Dodani su novi msgid-ovi i popravljeni su fuzzies.
+# U sljedećoj verziji bit će više izmjena, nakon konzultacije s
+# lingvistima, i hrvatskim TP članovima.
+# Zahvaljujem prijašnjim prevoditeljima, jer je na njihovom trudu,
+# napravljena i ova dopuna.
+# Matej Vela <mvela@public.srce.hr>, 1999.
+# Hrvoje Niksic <hniksic@xemacs.org>, 2002.
+# Tomislav Krznar <tomislav.krznar@gmail.com>, 2012.
+# Božidar Putanec <bozidarp@yahoo.com>, 2016-2019, 2021.
+# bp, 2016-04-03.
+msgid ""
+msgstr ""
+"Project-Id-Version: grep-3.6.27\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-08-09 16:49+0200\n"
+"Last-Translator: Božidar Putanec <bozidarp@yahoo.com>\n"
+"Language-Team: Croatian <lokalizacija@linux.hr>\n"
+"Language: hr\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"Plural-Forms: nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && n"
+"%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2);\n"
+"X-Generator: Poedit 3.0\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "nevaljani argument %s za %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "višeznačni argument %s za %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Valjani argumenti su:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "greška u programu"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "prelijevanje stȏga"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "greška pri pisanju"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "[ nema odgovarajući par"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "nevaljana znakovna klasa"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "sintaksa znakovne klase je [[:space]], ne [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "nedovršena \\ escape sekvencija"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "nevaljani sadržaj u \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "preveliki regularni izraz"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "( nema odgovarajući par"
+
+# „zadano“ je često „default“, pa radije „navedena“ ili „imenovana“
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "sintaksa nije navedena"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr ") nema odgovarajući par"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Nepoznata greška sustava"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: opcija „%s%s“ nije jednoznačna\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: opcija „%s%s“ nije jednoznačna; mogućnosti su:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: neprepoznata opcija „%s%s“\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: opcija „%s%s“ ne dopušta argument\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: opcija „%s%s“ zahtijeva argument\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: nevaljana opcija -- „%c“\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: opcija zahtijeva argument -- „%c“\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "nema dovoljno memorije"
+
+# lingvisti: trenutni > trenutačni
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "nije moguće registrirati trenutni radni direktorij"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "nije se uspjelo vratiti u početni radni direktorij"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "nije uspjelo postaviti deskriptor datoteke u tekst/binarni način"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "„"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "“"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Uspjeh"
+
+# no match: _REG_NOMATCH,		/* Didn't find a match (for regexec).  */
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Nema podudaranja"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Nevaljani regularni izraz"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Nevaljani znak za razvrstavanje"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Nevaljano ime za klasu znakova"
+
+# obrnuta > obratna
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Zaostala obratna kosa crta"
+
+# http://ihjj.hr/ referenca > referencija
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Nevaljana povratna referencija"
+
+# bp: fuzzy > popravljen
+# razmotri: nema para za [, [^, [:, [., ili [=
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "[, [^, [:, [., ili [= nema odgovarajući par"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "( ili \\( nema odgovarajući par"
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "\\{ nema odgovarajući par"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Nevaljani sadržaj u \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Nevaljani kraj raspona"
+
+# nedostaje memorije
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Nema dovoljno memorije"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Nevaljani prethodni regularni izraz"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Nedovršeni regularni izraz (preuranjeni završetak)"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Preveliki regularni izraz"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ") ili \\) nema odgovarajući par"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Nema prethodnog regularnog izraza"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Spakirali %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Spakirao %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Licencija GPLv3+: GNU GPL inačica 3 ili novija <%s>.\n"
+"Ovo je slobodan softver: slobodno ga mijenjajte i dijelite.\n"
+"NEMA JAMSTVA do granica dopuštenih zakonom.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Napisao %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Napisali %s i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Napisali %s, %s i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Napisali %s, %s, %s\n"
+"i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Napisali %s, %s, %s,\n"
+"%s i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Napisali %s, %s, %s,\n"
+"%s, %s i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Napisali %s, %s, %s,\n"
+"%s, %s, %s i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Napisali %s, %s, %s,\n"
+"%s, %s, %s, %s\n"
+"i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Napisali %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Napisali %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s i ostali.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"Greške u programu javite na <%s>.\n"
+"Primjedbe i pogreške u prijevodu javite na <lokalizacija@linux.hr>.\n"
+
+# prvi %s PACKAGE_PACKAGER,
+# drugi %s PACKAGE_PACKAGER_BUG_REPORTS
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Pogreške %s javite (na engleskom, LC_ALL=C) na <%s>\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Mrežna stranica za %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Općenita pomoć za korištenje GNU softvera: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(standardni ulaz)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "nevaljani kontekst duljine argumenta"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "ulaz je prevelik da se prebroji"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: binarna datoteka se podudara"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s upozorenje: rekurzivna petlja direktorija"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: ulazna datoteka je ujedno i izlaz"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Uporaba: %s [OPCIJA]... UZORCI [DATOTEKA]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Pokušajte s „%s --help“ za pomoć i više informacija.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Traži UZORKE u svakoj DATOTECI.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Primjer: %s -i 'hello world' menu.h main.c\n"
+"UZORCI mogu sadržavati višestruke mustre odijeljene sa znakom za novi redak "
+"(\\n).\n"
+"\n"
+"Izbor uzorka i interpretacija:\n"
+
+# engl. „string“ hrvatske mogućnosti: biseri, zrna i sl. nanizani na nit; niska.
+# Prijedlog je string  > niska
+# vidi http://hjp.znanje.hr/index.php?show=search_by_id&id=eF1uXRg%3D
+# ili ostavimo string = string !
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     UZORAK je prošireni regularni izraz (ERE)\n"
+"  -F, --fixed-strings       UZORAK je skup stringova odvojenih\n"
+"                              znakom novog retka (\\n)\n"
+"  -G, --basic-regexp        UZORAK je osnovni regularni izraz (BRE)\n"
+"  -P, --perl-regexp         UZORAK je Perl regularni izraz\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=UZORCI       koristi UZORKE kao regularni izraz\n"
+"  -f, --file=DATOTEKA       preuzmi UZORKE iz DATOTEKE\n"
+"  -i, --ignore-case         zanemari veličinu slova u uzorcima i podacima\n"
+"      --no-ignore-case      ne zanemaruje veličinu slova (zadano)\n"
+"  -w, --word-regexp         UZORAK podudara samo cijele riječi\n"
+"  -x, --line-regexp         UZORAK podudara samo cijele redove\n"
+"  -z, --null-data           redak završava s 0-bajtom, a ne sa znakom novog "
+"retka\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Razno:\n"
+"  -s, --no-messages         izostavi poruke o greškama\n"
+"  -v, --invert-match        odabere redove koji se ne podudaraju\n"
+"  -V, --version             informacije o inačici ovog programa\n"
+"      --help                ova pomoć\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Kontrola izlaza:\n"
+"  -m, --max-count=BROJ      prestane nakon BROJ nađenih redaka\n"
+"  -b, --byte-offset         uz retke ispiše i poziciju u bajtovima\n"
+"  -n, --line-number         uz retke ispiše broj retka\n"
+"      --line-buffered       izravno ispiše svaki izlazni redak\n"
+"  -H, --with-filename       uz retke ispiše ime datoteke za svako "
+"podudaranje\n"
+"  -h, --no-filename         bez ispisa imena datoteke za svako podudaranje\n"
+"      --label=OZNAKA        rabi OZNAKU kao ime datoteke na standardnom "
+"ulazu\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       prikaže samo dio retka koji se podudara\n"
+"  -q, --quiet, --silent     izostavi svaki normalni izlaz (ništa ne ispiše)\n"
+"      --binary-files=VRSTA  pretpostavi binarne datoteke tipa VRSTA;\n"
+"                              VRSTA je „binary“, „text“ ili „without-match“\n"
+"  -a, --text                isto kao --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        isto kao --binary-files=without-match\n"
+"  -d, --directories=AKCIJA  kako rukovati direktorijima;\n"
+"                              AKCIJA je „read“, „recurse“ ili „skip“\n"
+"  -D, --devices=AKCIJA      kako rukovati uređajima, FIFO uređajima\n"
+"                              i utičnicama;  AKCIJA je „read“ ili „skip“\n"
+"  -r, --recursive           isto kao --directories=recurse\n"
+"  -R, --dereference-recursive  jednako, ali slijedi svaku simboličku vezu\n"
+
+# http://hjp.znanje.hr/index.php?show=kosi_oblici&id=eVxhWxI%3D
+# podudaran > koji je sukladan s čim, koji se poklapa s kim/čim
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=GLOB        pretraži samo datoteke koje se podudaraju\n"
+"                              s GLOB-om (datoteka s uzorcima)\n"
+"      --exclude=GLOB        preskoči sve datoteke i direktorije koji se\n"
+"                              podudaraju s GLOB-om (datoteka s uzorcima)\n"
+"      --exclude-from=DATOTEKA  preskoči sve datoteke koje se podudaraju s\n"
+"                                 bilo kojim uzorkom u DATOTEKA\n"
+"      --exclude-dir=GLOB    preskoči direktorije koji podudaraju GLOB\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match  ispiše samo imena DATOTEKA bez podudaranja\n"
+"  -l, --files-with-matches  ispiše samo imena DATOTEKA s podudaranjima\n"
+"  -c, --count               ispiše samo broj podudarnih redaka po DATOTECI\n"
+"  -T, --initial-tab         poravna tabove (ako je potrebno)\n"
+"  -Z, --null                ispiše 0-bajt nakon imena DATOTEKE\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Kontrola konteksta:\n"
+"  -B, --before-context=BROJ  ispiše BROJ redaka konteksta koji prethode\n"
+"  -A, --after-context=BROJ  ispiše BROJ redaka konteksta koji slijede\n"
+"  -C, --context=BROJ        ispiše BROJ redaka konteksta koji prethode/"
+"slijede\n"
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -BROJ                     isto kao --context=BROJ\n"
+"      --group-separator=SEP  ispiše SEP(arator) u retku između\n"
+"                               podudaranja s kontekstom\n"
+"      --no-group-separator  ne ispiše separator za podudaranja s kontektsom\n"
+"      --color[=KADA],\n"
+"      --colour[=KADA]       bojama istakne nađene stringove i markere;\n"
+"                            KADA može biti „always“ ili „never“ ili „auto“\n"
+"  -U, --binary              ne uklanja CqR znakove na EOL (MSDOS/Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Ako je DATOTEKA „-“ (spojnica), čita standardni ulaz. Bez DATOTEKE,\n"
+"rekurzivno čita „.“, inače čita „-“ (stdin).\n"
+"S manje od dvije navedene DATOTEKE implicira opciju -h.\n"
+"Završi sa statusom 0 ako je nađen barem jedan redak, inače s 1;\n"
+"ako ima grešaka, a nije navedena opcija -q, završi sa statusom 2.\n"
+
+# matchers su tragači (java, perl, itd.)
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "navedeni uzorci su međusobno konfliktni"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"Kompiliranje s --disable-perl-regexp ne podržava podudaranje na Perl način"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "nevaljana sintaksa uzorka %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "nepoznata metoda uređaja"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr "upozorenje: opcija--unix-byte-offsets (-u) je zastarjela"
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "nevaljani maksimalni broj"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "nepoznata vrsta binarnih datoteka"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Napisali Mike Haertel i ostali; vidi\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+# bp: novi msgid
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "dodjela memorije za PCRE JIT stȏg nije uspjela"
+
+# bp: novi msgid
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P podržava samo unibyte i UTF-8 locale"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "opcija -P podržava samo jedan uzorak"
+
+# bp: novi msgid
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "**interna greška** (nije se smjela dogoditi)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "prekoračeno je ograničenje duljine retka PCRE-a"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: nema dovoljno memorije"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: PCRE JIT stȏg je iscrpljen"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: prekoračeno je ograničenje broja vraćanja PCRE-a"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: prekoračeno je ograničenje broja rekurzija PCRE-a"
+
+# bp:fuzzy popravljen
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: interna PCRE greška: %d"
+
+#~ msgid "warning: %s: %s"
+#~ msgstr "upozorenje: %s: %s"
+
+# bp: alias > pseudonim ? > nadimak ?
+# script > skripta
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr ""
+#~ "Upozorenje: upotreba GREP_OPTIONS je zastarjela ; rabite alias ili script"
+
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "%s internetska stranica: <https://www.gnu.org/software/%s/>\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "nevaljani %s%s argument „%s“"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "nevaljani sufiks u %s%s argumentu „%s“"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "%s%s argument „%s“ je preveliki"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "internal error"
+#~ msgstr "interna greška"
+
+# http://ihjj.hr/ : dozvoljava > dopušta
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: opcija „--%s“ ne dopušta argument\n"
+
+# http://ihjj.hr/ : nepropoznat > nije prepoznat > nepoznat
+# neprepoznat: možda bi trebao biti prepoznat, ali nije
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: nepoznata opcija „--%s“\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: opcija „-W %s“ nije jednoznačna\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: opcija „-W %s“ ne dopušta argument\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: opcija „-W %s“ zahtijeva argument\n"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "UZORAK je (podrazumijeva se) osnovni regularni izraz (BRE).\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "„egrep“ znači „grep -E“.  „fgrep“ znači „grep -F“.\n"
+#~ "Izravno pozivanje „egrep“ i „fgrep“ je zastarjelo.\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "lseek nije uspio"
+
+# bp: novi msgid
+# escape > cause (a subsequent character or characters) to be interpreted differently.
+#~ msgid "unescaped ^ or $ not supported with -Pz"
+#~ msgstr "znakovi ^ ili $ bez prethodne ‘\\’ (unescaped) nisu podržani s -Pz"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "UZORAK je prošireni regularni izraz (ERE).\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr "Pozivanje naredbom „egrep” je zastarjelo; koristite „grep -E”.\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr ""
+#~ "UZORAK je skup fiksnih znakovnih nizova odvojenih znakom novog retka.\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr "Pozivanje naredbom „fgrep” je zastarjelo; koristite „grep -F”.\n"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "GNU Grep početna stranica: <%s>\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s može koristiti samo %s sintaksu uzoraka"
+
+#~ msgid "the --mmap option has been a no-op since 2010"
+#~ msgstr "opcija --map je prazna operacija (no-op) od 2010."
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "nedovren broj ponavljanja"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "izoblien broj ponavljanja"
+
+#~ msgid "out of memory"
+#~ msgstr "ponestalo memorije"
+
+#~ msgid "writing output"
+#~ msgstr "piem izlaz"
+
+#~ msgid "Usage: %s [OPTION]... PATTERN [FILE] ...\n"
+#~ msgstr "Koritenje: %s [OPCIJA]... UZORAK [SPIS] ...\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE\n"
+#~ "                            TYPE is 'binary', 'text', or 'without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories\n"
+#~ "                            ACTION is 'read', 'recurse', or 'skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets\n"
+#~ "                            ACTION is 'read' or 'skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=PATTERN     files that match PATTERN will be examined\n"
+#~ "      --exclude=PATTERN     files that match PATTERN will be skipped.\n"
+#~ "      --exclude-from=FILE   files that match PATTERN in FILE will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match only print FILE names containing no match\n"
+#~ "  -l, --files-with-matches  only print FILE names containing matches\n"
+#~ "  -c, --count               only print a count of matching lines per "
+#~ "FILE\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Kontrola izlaza:\n"
+#~ "  -m, --max-count=BROJ      zaustavi se nakon BROJA preklapanja\n"
+#~ "  -b, --byte-offset         ispii bajtovni offset uz brojeve linija\n"
+#~ "  -n, --line-number         ispii brojeve linija uz izlazne linije\n"
+#~ "      --line-buffered       poalji izlaz nakon svakog reda\n"
+#~ "  -H, --with-filename       ispii naziv spisa pri svakom poklapanju\n"
+#~ "  -h, --no-filename         ne ispisuj naziv spisa na izlazu\n"
+#~ "      --label=LABELA        ispii LABELU kao naziv spisa za standardni "
+#~ "izlaz\n"
+#~ "  -o, --only-matching       prikai samo dio retka koji se preklapa s "
+#~ "UZORKOM\n"
+#~ "  -q, --quiet, --silent     zatomi sav normalan izlaz\n"
+#~ "      --binary-files=TIP    pretpostavi da su binarni spisi TIPA\n"
+#~ "                            TIP je 'binary', 'text' ili 'without-match'\n"
+#~ "  -a, --text                ekvivalentno --binary-files=text\n"
+#~ "  -I                        ekvivalentno --binary-files=without-match\n"
+#~ "  -d, --directories=RADNJA  to initi s direktorijima\n"
+#~ "                            RADNJA je 'read' (itaj), "
+#~ "'recurse' (rekurzivno\n"
+#~ "                            ui) ili 'skip' (preskoi)\n"
+#~ "  -D, --devices=RADNJA      to initi s deviceovima, FIFO-ima i socketima\n"
+#~ "                            RADNJA je 'read' (itaj) ili 'skip' (preskoi)\n"
+#~ "  -R, -r, --recursive       ekvivalentno --directories=recurse\n"
+#~ "      --include=UZORAK      obradi spise koji se poklapaju s UZORKOM\n"
+#~ "      --exclude=UZORAK      preskoi spise koji se poklapaju s UZORKOM\n"
+#~ "      --exclude-from=SPIS   preskoi spise koji se poklapaju s UZORKOM u "
+#~ "SPISU\n"
+#~ "  -L, --files-without-match ispii samo nazive SPISA koji se nisu "
+#~ "poklopili\n"
+#~ "  -l, --files-with-matches  ispii samo nazive SPISA koji sadre "
+#~ "podudarnosti\n"
+#~ "  -c, --count               ispii samo broj podudarnih linija po SPISU\n"
+#~ "  -Z, --null                ispii 0-bajt nakon naziva SPISA\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Report bugs to <bug-gnu-utils@gnu.org>.\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Bugove prijavljujte na <bug-gnu-utils@gnu.org>.\n"
+
+#~ msgid "unknown directories method"
+#~ msgstr "nepoznata metoda za direktorije"
+
+#~ msgid "%s (GNU grep) %s\n"
+#~ msgstr "%s (GNU grep) %s\n"
+
+#~ msgid ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+#~ msgstr ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions. There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "Ovo je slobodan program; za uvjete kopiranja pogledajte izvorni kod. "
+#~ "NEMA\n"
+#~ "jamstva; ak ni za TRGOVINSKU PRIKLADNOST ili ODGOVARANJE ODREENOJ SVRSI.\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "Opcije -P i -z ne idu zajedno"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: nedoputena opcija -- %c\n"
diff --git a/src/grep/po/hu.gmo b/src/grep/po/hu.gmo
new file mode 100644
index 0000000..0244224
--- /dev/null
+++ b/src/grep/po/hu.gmo
diff --git a/src/grep/po/hu.po b/src/grep/po/hu.po
new file mode 100644
index 0000000..9e633d2
--- /dev/null
+++ b/src/grep/po/hu.po
@@ -0,0 +1,838 @@
+# Hungarian translation for grep.
+# Copyright (C) 2002, 2009, 2010, 2014, 2015, 2016, 2017, 2019 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+#
+# Emese Kovács <emese@instantweb.hu>, 2002, 2010.
+# Gabor Kelemen <kelemeng@gnome.hu>, 2009, 2010, 2014, 2016, 2017.
+# Balázs Úr <ur.balazs@fsf.hu>, 2014, 2015, 2019.
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 3.1.48\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2019-11-23 22:33+0100\n"
+"Last-Translator: Balázs Úr <ur.balazs@fsf.hu>\n"
+"Language-Team: Hungarian <translation-team-hu@lists.sourceforge.net>\n"
+"Language: hu\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"X-Generator: Lokalize 19.04.3\n"
+"Plural-Forms:  nplurals=2; plural=(n != 1);\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "a(z) %s argumentum érvénytelen a következőhöz: %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "a(z) „%s” argumentum nem egyértelmű a következőhöz: „%s”"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Az érvényes argumentumok a következők:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "programhiba"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "verem túlcsordulás"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "íráshiba"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "kiegyensúlyozatlan ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "érvénytelen karakterosztály"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "a karakterosztály szintaxisa [[:space:]], nem [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "befejezetlen \\ escape"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "a \\{\\} tartalma érvénytelen"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "a reguláris kifejezés túl nagy"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "kiegyensúlyozatlan ("
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "nincs szintaxis megadva"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "kiegyensúlyozatlan )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Ismeretlen rendszerhiba"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: a(z) „%s%s” kapcsoló nem egyértelmű\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: a(z) „%s%s” kapcsoló nem egyértelmű, lehetőségek:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: a(z) „%s%s” kapcsoló ismeretlen\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: a(z) „%s%s” kapcsoló nem enged meg argumentumot\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: a(z) „%s%s” kapcsolóhoz argumentum szükséges\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: érvénytelen kapcsoló -- „%c”\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: a kapcsoló egy argumentumot igényel -- „%c”\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "elfogyott a memória"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "az aktuális munkakönyvtár feljegyzése meghiúsult"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "a visszatérés meghiúsult a kiinduló munkakönyvtárba"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "nem sikerült beállítani a fájlleíró szöveges/bináris módját"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "„"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "”"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Sikerült"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Nincs találat"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Érvénytelen reguláris kifejezés"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Érvénytelen leválogatási karakter"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Érvénytelen karakterosztálynév"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Záró visszaper"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Érvénytelen visszahivatkozás"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Pár nélküli [, [^, [:, [., vagy [="
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "Pár nélküli ( vagy \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "Pár nélküli \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "A \\{\\} tartalma érvénytelen"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Érvénytelen tartományvég"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Elfogyott a memória"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Érvénytelen megelőző reguláris kifejezés"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "A reguláris kifejezés túl korán véget ért"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "A reguláris kifejezés túl nagy"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "Pár nélküli ) vagy \\)"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Nincs megelőző reguláris kifejezés"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Csomagolta: %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Csomagolta: %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, fuzzy, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"\n"
+"A licenc GPLv3+: a GNU GPL 3. vagy újabb változata <https://gnu.org/licenses/"
+"gpl.html>\n"
+"Ez egy szabad szoftver, terjesztheti és/vagy módosíthatja.\n"
+"NINCS GARANCIA, a törvény által engedélyezett mértékig.\n"
+"\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Írta %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Írta %s és %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Írta %s, %s, és %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Írta %s, %s, %s,\n"
+"és %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Írta %s, %s, %s,\n"
+"%s, és %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Írta %s, %s, %s,\n"
+"%s, %s, és %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Írta %s, %s, %s,\n"
+"%s, %s, %s, és %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Írta %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"és %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Írta %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, és %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Írta %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, és mások.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, fuzzy, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"\n"
+"A hibák a(z) %s címen jelenthetők.\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "A(z) %s hibái a(z) %s címen jelenthetők.\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "A(z) %s honlapja: <%s>\n"
+
+#: lib/version-etc.c:260
+#, fuzzy, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr ""
+"Általános segítség a GNU szoftverek használatához: <https://www.gnu.org/"
+"gethelp/>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(szabványos bemenet)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "érvénytelen szövegkörnyezethossz argumentum"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "a bemenet túl nagy a megszámláláshoz"
+
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "%s bináris fájl illeszkedik\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "rekurzív könyvtárhurok"
+
+#: src/grep.c:1899
+#, fuzzy, c-format
+msgid "%s: input file is also the output"
+msgstr "%s bemeneti fájl a kimenet is"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Használat: %s [KAPCSOLÓ]… MINTÁK [FÁJL]…\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "További információkért adja ki a(z) „%s --help” parancsot.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "A MINTÁK keresése minden FÁJLBAN.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Példa: %s -i 'szia világ' menu.h main.c\n"
+"A MINTÁK tartalmazhat több mintát új sorokkal elválasztva.\n"
+"\n"
+"Minta kiválasztása és értelmezése:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     a MINTÁK kiterjesztett reguláris kifejezések\n"
+"  -F, --fixed-strings       a MINTÁK karakterláncok\n"
+"  -G, --basic-regexp        a MINTÁK alapvető reguláris kifejezések\n"
+"  -P, --perl-regexp         a MINTÁK Perl reguláris kifejezések\n"
+
+#: src/grep.c:1981
+#, fuzzy, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=MINTÁK       a MINTÁK használata illesztésre\n"
+"  -f, --file=FÁJL           a MINTÁK beolvasása a FÁJLBÓL\n"
+"  -i, --ignore-case         a kis- és nagybetűk megegyeznek\n"
+"  -w, --word-regexp         csak egész szavakra illesztés\n"
+"  -x, --line-regexp         csak egész sorokra illesztés\n"
+"  -z, --null-data           az adat sorai 0 bájtra végződnek, nem újsorra\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Egyéb:\n"
+"  -s, --no-messages         hibaüzenetek elnémítása\n"
+"  -v, --invert-match        a nem illeszkedő sorok kiválogatása\n"
+"  -V, --version             verzióinformációk kiírása és kilépés\n"
+"      --help                ezen súgó kiírása és kilépés\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Kimenet beállításai:\n"
+"  -m, --max-count=SZÁM      megáll SZÁM kiválasztott sor után\n"
+"  -b, --byte-offset         a kimenetben szerepel a sor helye is "
+"(bájteltolás)\n"
+"  -n, --line-number         a kimenetben szerepel a sor száma is\n"
+"      --line-buffered       kimenet kiürítése minden sor után\n"
+"  -H, --with-filename       fájlnév kiírása a kimeneti sorokkal\n"
+"  -h, --no-filename         a kimenetbe nem írja ki a fájlnév előtagot\n"
+"      --label=CÍMKE         a CÍMKE kiírása fájlnévként a szabványos "
+"bemenet\n"
+"                              használatakor\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       az illeszkedő soroknak csak a nem üres részeit\n"
+"                              jelenítse meg\n"
+"  -q, --quiet, --silent     minden szokványos kimenet elhagyása\n"
+"      --binary-files=TÍPUS  a bináris fájlokat adott TÍPUSÚNAK veszi, a "
+"TÍPUS\n"
+"                              a „binary”, „text” vagy „without-match” "
+"egyike\n"
+"  -a, --text                ugyanaz, mint a --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        ugyanaz, mint a --binary-files=without-match\n"
+"  -d, --directories=MŰVELET mi történjen a könyvtárakkal; a MŰVELET\n"
+"                              a „read”, „recurse” vagy „skip” egyike\n"
+"  -D, --devices=MŰVELET     mi történjen az eszközökkel, FIFO-kkal és\n"
+"                              foglalatokkal, a MŰVELET a „read” vagy „skip”\n"
+"                              egyike\n"
+"  -r, --recursive           ugyanaz, mint a --directories=recurse\n"
+"  -R, --dereference-recursive hasonló, de követi az összes szimlinket\n"
+
+#: src/grep.c:2023
+#, fuzzy, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=GLOB        csak a GLOBRA (fájlmintára) illeszkedő fájlok\n"
+"                              keresése\n"
+"      --exclude=GLOB        a GLOBRA (fájlmintára) illeszkedő fájlok és\n"
+"                              könyvtárak kihagyása\n"
+"      --exclude-from=FÁJL   a FÁJLBAN található fájlmintákra illeszkedő\n"
+"                              fájlok kihagyása\n"
+"      --exclude-dir=GLOB    a GLOBRA (fájlmintára) illeszkedő könyvtárak\n"
+"                              kihagyása\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match csak a kiválasztott sorok nélküli fájlnevek "
+"kiírása\n"
+"  -l, --files-with-matches  csak a kiválasztott sorokat tartalmazó "
+"fájlnevek\n"
+"                              kiírása\n"
+"  -c, --count               csak a kiválasztott sorok számának kiírása, "
+"FÁJLONKÉNT\n"
+"  -T, --initial-tab         sorok feltöltése tabokkal (ha szükséges)\n"
+"  -Z, --null                0 bájt írása a FÁJLNÉV után\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Szövegkörnyezet beállításai:\n"
+"  -B, --before-context=SZÁM SZÁM db. sor kiírása a találat előtti "
+"környezetből\n"
+"  -A, --after-context=SZÁM  SZÁM db. sor kiírása a találat utáni "
+"környezetből\n"
+"  -C, -- context=SZÁM       SZÁM darab sor kiírása a környezetből\n"
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -SZÁM                     ugyanaz, mint a --context=SZÁM\n"
+"      --color[=EKKOR],\n"
+"      --colour[=EKKOR]      az illeszkedő karakterláncot beszínezi\n"
+"                              az EKKOR lehet „always”, „never” vagy „auto”\n"
+"  -U, --binary              nem vágja le a CR karaktereket sor végén\n"
+"                              (MSDOS/Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, fuzzy, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Ha a FÁJL a „-”, akkor a szabványos bemenetről olvas. Ha nincs megadva "
+"FÁJL,\n"
+"rekurzív működéskor a „.” egyébként a „-” olvasása. Kettőnél kevesebb FÁJL\n"
+"megadásakor a -h kapcsolót feltételezi. A kilépési állapot 0, ha bármely "
+"sor\n"
+"(vagy fájl a -L kapcsolónál) kiválasztásra kerül, egyébként 1. Ha hiba\n"
+"történt és a -q nincs megadva, akkor a kilépési állapot 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "ütköző illesztők lettek megadva"
+
+#: src/grep.c:2101
+#, fuzzy
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"a -P kapcsoló támogatása nincs belefordítva ebbe a --disable-perl-regexp "
+"binárisba"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "érvénytelen illesztő: %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "ismeretlen eszközmódszer"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "érvénytelen maximális szám"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "ismeretlen bináris fájl típus"
+
+#: src/grep.c:2829
+#, fuzzy
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr "mások, lásd: <https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>"
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "nem sikerült memóriát foglalni a PCRE JIT veremnek"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "a -P csak unibyte és UTF-8 területi beállításokat támogat"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "a -P kapcsoló csak egy mintát támogat"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "belső hiba (soha nem szabadna előfordulnia)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "a PCRE sorhossza túllépve"
+
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "elfogyott a memória"
+
+#: src/pcresearch.c:310
+#, fuzzy, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "kifogyott a PCRE JIT verem"
+
+#: src/pcresearch.c:315
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "a PCRE visszakövetési korlátja túllépve"
+
+#: src/pcresearch.c:319
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "a PCRE visszakövetési korlátja túllépve"
+
+#: src/pcresearch.c:327
+#, fuzzy, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "belső PCRE hiba: %d"
+
+#, c-format
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr ""
+#~ "figyelem: a GREP_OPTIONS elavult; használjon álnevet vagy parancsfájlt"
+
+#, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "figyelmeztetés: %s: %s"
+
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "A %s honlapja: <https://www.gnu.org/software/%s/>\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "érvénytelen %s%s argumentum: „%s”"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "érvénytelen utótag a(z) %s%s argumentumban: „%s”"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "%s%s: a(z) „%s” argumentum túl nagy"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "internal error"
+#~ msgstr "belső hiba"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: a(z) „--%s” kapcsoló nem enged meg argumentumot\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: a(z) „--%s” kapcsoló ismeretlen\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: a „-W %s” kapcsoló nem egyértelmű\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: a „-W %s” kapcsoló nem enged meg argumentumot\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: a(z) „-W%s” kapcsolóhoz argumentum szükséges\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "az lseek meghiúsult"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "A MINTA egy alapszintű reguláris kifejezés (BRE).\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "Az „egrep” jelentése „grep -E”. Az „fgrep” jelentése „grep -F”.\n"
+#~ "A közvetlen hívás „egrep” vagy „fgrep” formában elavult.\n"
+
+#~ msgid "unescaped ^ or $ not supported with -Pz"
+#~ msgstr "a nem escapelt ^ vagy $ nem támogatott a -Pz kapcsolóval"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "A GNU Grep honlapja: <%s>\n"
+
+#~ msgid "invalid UTF-8 byte sequence in input"
+#~ msgstr "érvénytelen UTF-8 bájtsorozat a bemenetben"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "A MINTA egy bővített reguláris kifejezés (ERE).\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr ""
+#~ "A hívás „egrep” formában elavult, használja helyette a „grep -E” alakot.\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr "A MINTA egy újsorokkal elválasztott rögzített karakterlánc.\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr ""
+#~ "A hívás „fgrep” formában elavult, használja helyette a „grep -F” alakot.\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "a(z) %s csak a(z) %s mintaszintaxist tudja használni"
diff --git a/src/grep/po/id.gmo b/src/grep/po/id.gmo
new file mode 100644
index 0000000..3ff2def
--- /dev/null
+++ b/src/grep/po/id.gmo
diff --git a/src/grep/po/id.po b/src/grep/po/id.po
new file mode 100644
index 0000000..291b05e
--- /dev/null
+++ b/src/grep/po/id.po
@@ -0,0 +1,749 @@
+# Pesan bahasa indonesia untuk grep
+# Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Tedi Heriyanto <tedi_h@gmx.net>, 1999, 2000, 2001, 2002.
+# Arif E. Nugroho <arif_endro@yahoo.com>, 2008, 2009, 2010, 2011, 2012, 2013, 2014.
+# Andika Triwidada <andika@gmail.com>, 2018, 2020, 2021.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 3.6.27\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-08-10 10:35+0700\n"
+"Last-Translator: Andika Triwidada <andika@gmail.com>\n"
+"Language-Team: Indonesian <translation-team-id@lists.sourceforge.net>\n"
+"Language: id\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=ISO-8859-1\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"X-Generator: Poedit 2.4.3\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "argumen %s yang tidak valid untuk %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "argumen %s ambigu untuk %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Argumen yang valid adalah:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "kesalahan program"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "stack overflow"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "kesalahan tulis"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "[ tidak seimbang"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "kelas karakter tidak valid"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "sintaks kelas karakter adalah [[:space:]], bukan [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "escape \\ tidak selesai"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "isi dari \\{\\} tidak valid"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "ekspresi reguler terlalu besar"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "( tidak seimbang"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "tidak ada sintaks yang dinyatakan"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr ") tidak seimbang"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Kesalahan sistem tidak dikenal"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: opsi '%s%s' ambigu\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: opsi '%s%s' ambigu; kemungkinan:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: opsi tidak dikenal '%s%s'\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: opsi '%s%s' tidak mengizinkan sebuah argumen\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: opsi '%s%s' membutuhkan sebuah argumen\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: opsi tidak valid -- %c\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: opsi membutuhkan sebuah argumen -- %c\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "kehabisan memori"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "tidak bisa merekam direktori kerja sekarang"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "gagal kembali ke direktori kerja sekarang"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "gagal menata mode teks/biner descriptor berkas"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "'"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "'"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Sukses"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Tak ada yang cocok"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Ekspresi reguler tidak valid"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Karakter kolasi tidak valid"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Nama kelas karakter tidak valid"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Kelebihan backslash"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Referensi balik tidak valid"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "[, [^, [:, [., atau [= tanpa pasangan"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "( atau \\( tanpa pasangan"
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "\\{ tanpa pasangan"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Isi dari \\{\\} tidak valid"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Akhir rentang tidak valid"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Kehabisan memori"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Ekspresi reguler yang mendahului tidak valid"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Akhir dini dari ekspresi reguler"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Ekspresi reguler terlalu besar"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ") atau \\) tanpa pasangan"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Tidak ada ekspresi reguler sebelumnya"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Dipaketkan oleh %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Dipaketkan oleh %s \n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "(C)"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Lisensi GPLv3+; GNU GPL versi 3 atau lebih lanjut <%s>.\n"
+"Ini adalah aplikasi bebas; Anda bebas untuk mengubah dan "
+"meredistribusikannya.\n"
+"TIDAK ADA GARANSI disini, sampai batas yang diijinkan oleh hukum yang "
+"berlaku.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Ditulis oleh %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Ditulis oleh %s dan %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Ditulis oleh %s, %s, and %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Ditulis oleh %s, %s, %s,\n"
+"dan %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Ditulis oleh %s, %s, %s,\n"
+"%s, dan %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Ditulis oleh %s, %s, %s,\n"
+"%s, %s, dan %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Ditulis oleh %s, %s, %s,\n"
+"%s, %s, %s, dan %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Ditulis oleh %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"dan %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Ditulis oleh %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, dan %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Ditulis oleh %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, dan yang lain.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "Laporkan kutu ke: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Laporkan kutu %s ke: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Laman web %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Bantuan umum menggunakan aplikasi GNU: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(masukan standar)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "argumen panjang konteks tidak valid"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "masukan terlalu besar untuk dihitung"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: berkas biner cocok"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: peringatan: perulangan direktori rekursif"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: berkas masukan juga sebagai keluaran"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Penggunaan: %s [OPSI]... POLA [BERKAS]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Coba '%s --help' untuk informasi lebih lanjut.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Cari POLA dalam setiap BERKAS.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Contoh: %s -i 'hello world' menu.h main.c\n"
+"POLA bisa memuat beberapa pola yang dipisah oleh baris baru.\n"
+"\n"
+"Seleksi dan interpretasi pola:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     POLA adalah ekspresi reguler diperluas\n"
+"  -F, --fixed-string        POLA adalah string\n"
+"  -G, --basic-regexp        POLA adalah ekspresi reguler dasar\n"
+"  -P, --perl-regexp         POLA adalah sebuah ekspresi reguler Perl\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=POLA         gunakan POLA untuk pencocokan\n"
+"  -f, --file=BERKAS         dapatkan POLA dari BERKAS\n"
+"  -i, --ignore-case         abaikan perbedaan besar kecil huruf dalam pola "
+"dan data\n"
+"      --no-ignore-case      jangan abaikan perbedaan besar kecil huruf "
+"(baku)\n"
+"  -w, --word-regexp         paksa POLA hanya untuk pencocokan dengan "
+"keseluruhan kata\n"
+"  -x, --line-regexp         paksa POLA hanya untuk pencocokan dengan "
+"keseluruhan baris\n"
+"  -z, --null-data           baris data berakhir dengan byte 0, bukan baris-"
+"baru\n"
+"\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Lain-lain:\n"
+"  -s, --no-messages         sembunyikan pesan kesalahan\n"
+"  -v, --invert-match        pilih baris-baris yang tidak sesuai\n"
+"  -V, --version             tampilkan informasi versi dan keluar\n"
+"      --help                tampilkan bantuan ini dan keluar\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Kendali keluaran:\n"
+"  -m, --max-count=NUM       berhenti setelah NUM kecocokan\n"
+"  -b, --byte-offset         cetak ofset byte dengan baris-baris keluaran\n"
+"  -n, --line-number         cetak nomor baris dengan baris-baris keluaran\n"
+"      --line-buffered       gelontor keluaran pada setiap baris\n"
+"  -H, --with-filename       cetak nama berkas dengan baris-baris keluaran\n"
+"  -h, --no-filename         sembunyikan prefiks nama berkas pada keluaran\n"
+"      --label=LABEL         pakai LABEL sebagai prefiks nama berkas masukan "
+"standar\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       hanya tampilkan bagian dari baris yang cocok\n"
+"  -q, --quiet, --silent     sembunyikan semua keluaran normal\n"
+"      --binary-files=TIPE   asumsikan bahwa berkas biner adalah TIPE;\n"
+"                            TIPE adalah 'binary', 'text', atau 'without-"
+"match'\n"
+"  -a, --text                ekuivalen dengan --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        ekuivalen dengan --binary-files=without-match\n"
+"  -d, --directories=AKSI    bagaimana menangani direktori;\n"
+"                            AKSI adalah 'read', 'recurse', atau 'skip'\n"
+"  -D, --devices=AKSI        bagaimana menangani peranti, FIFO, dan soket;\n"
+"                            AKSI adalah 'read' atau 'skip'\n"
+"  -r, --recursive           seperti --directories=recurse\n"
+"  -R, --dereference-recursive  serupa, tapi ikut semua symlink\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=GLOB         hanya cari berkas yang cocok dengan GLOB (suatu "
+"pola berkas)\n"
+"      --exclude=GLOB         lewati berkas yang cocok dengan GLOB\n"
+"      --exclude-from=BERKAS  lewati berkas yang cocok dengan sebarang pola "
+"dari BERKAS\n"
+"      --exclude-dir=GLOB     lewati direktori yang cocok dengan GLOB\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match  hanya cetak nama BERKAS yang tidak memuat baris "
+"yang cocok\n"
+"  -l, --files-with-matches   hanya cetak nama BERKAS dengan baris yang "
+"cocok\n"
+"  -c, --count                hanya cetak cacah baris yang cocok per BERKAS\n"
+"  -T, --initial-tab          jadikan tab sejajar (bila diperlukan)\n"
+"  -Z, --null                 cetak byte 0 setelah nama BERKAS\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Kendali konteks:\n"
+"  -B, --before-context=NUM  cetak NUM baris yang mendahului konteks\n"
+"  -A, --after-context=NUM   cetak NUM baris yang mengikuti konteks\n"
+"  -C, --context=NUM         cetak NUM baris konteks keluaran\n"
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NUM                      sama seperti --context=NUM\n"
+"      --group-separator=SEP  cetak SEP pada baris antara kecocokan dengan "
+"konteks\n"
+"      --no-group-separator  jangan cetak pemisah untuk kecocokan dengan "
+"konteks\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       gunakan penanda untuk membedakan string yang "
+"cocok\n"
+"                            WHEN dapat berupa 'always', 'never', atau "
+"'auto'\n"
+"  -U, --binary              jangan hapus karakter CR di EOL (MSDOS)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Jika BERKAS adalah '-', baca masukan standar.  Tanpa BERKAS, baca '.'\n"
+"bila rekursif, '-' jika tidak.  Dengan kurang dari dua BERKAS, asumsikan -"
+"h.\n"
+"Status keluar adalah 0 jika baris apa pun dipilih, 1 jika tidak;\n"
+"jika ada kesalahan apapun dan opsi -q tidak diberikan, status keluar adalah "
+"2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "pencocok yang bertentangan dispesifikasikan"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr "Pencocokan Perl tidak didukung dalam suatu build --disable-perl-regexp"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "pencocok tidak valid %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "metode peranti tidak dikenal"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr "peringatan: --unix-byte-offsets (-u) usang"
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "cacah maks tidak valid"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "tipe berkas biner tidak dikenal"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Ditulis oleh Mike Haertel dan lainnya, lihat\n"
+"<http://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "gagal mengalokasikan memori untuk stack JIT PCRE"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P hanya mendukung unibyte dan locale UTF-8"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "opsi -P hanya mendukung sebuah pola tunggal"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "kesalahan internal (mestinya tidak pernah terjadi)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "melampaui batas panjang baris PCRE"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: kehabisan memori"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: stack JIT PCRE habis"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: melampaui batas backtrack PCRE"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: melampaui batas rekursi PCRE"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: kesalahan PCRE internal: %d"
diff --git a/src/grep/po/insert-header.sin b/src/grep/po/insert-header.sin
new file mode 100644
index 0000000..b26de01
--- /dev/null
+++ b/src/grep/po/insert-header.sin
@@ -0,0 +1,23 @@
+# Sed script that inserts the file called HEADER before the header entry.
+#
+# At each occurrence of a line starting with "msgid ", we execute the following
+# commands. At the first occurrence, insert the file. At the following
+# occurrences, do nothing. The distinction between the first and the following
+# occurrences is achieved by looking at the hold space.
+/^msgid /{
+x
+# Test if the hold space is empty.
+s/m/m/
+ta
+# Yes it was empty. First occurrence. Read the file.
+r HEADER
+# Output the file's contents by reading the next line. But don't lose the
+# current line while doing this.
+g
+N
+bb
+:a
+# The hold space was nonempty. Following occurrences. Do nothing.
+x
+:b
+}
diff --git a/src/grep/po/it.gmo b/src/grep/po/it.gmo
new file mode 100644
index 0000000..206d42a
--- /dev/null
+++ b/src/grep/po/it.gmo
diff --git a/src/grep/po/it.po b/src/grep/po/it.po
new file mode 100644
index 0000000..8cb743e
--- /dev/null
+++ b/src/grep/po/it.po
@@ -0,0 +1,755 @@
+# Italian translation of grep
+# Copyright (C) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2016, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2020 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+#
+# Marco d'Itri <md@linux.it>, 1999, 2001.
+# Milo Casagrande <milo@milo.name>, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2016, 2018, 2020.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep-3.5.16\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2020-11-14 15:55+0100\n"
+"Last-Translator: Milo Casagrande <milo@milo.name>\n"
+"Language-Team: Italian <tp@lists.linux.it>\n"
+"Language: it\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"Plural-Forms: nplurals=2; plural=(n!=1);\n"
+"X-Generator: Poedit 2.4.1\n"
+"X-Poedit-SourceCharset: UTF-8\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "argomento %s per %s non valido"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "argomento %s ambiguo per %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Gli argomenti validi sono:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "errore del programma"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "overflow dello stack"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "errore di scrittura"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "[ non bilanciata"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "Classe del carattere non valido"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "La sintassi per la classe di caratteri è [[:space:]], non [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "Escape \\ incompleto"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "Contenuto di \\{\\} non valido"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "Espressione regolare troppo grande"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "( non bilanciata"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "Nessuna sintassi specificata"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr ") non bilanciata"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Errore di sistema sconosciuto"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: l'opzione \"%s%s\" è ambigua\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: l'opzione \"%s%s\" è ambigua. Possibilità:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: opzione \"%s%s\" non riconosciuta\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: l'opzione \"%s%s\" non accetta argomenti\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: l'opzione \"%s%s\" richiede un argomento\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: opzione non valida -- \"%c\"\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: l'opzione richiede un argomento -- \"%c\"\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "memoria esaurita"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "impossibile registrare la directory di lavoro attuale"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "errore nel restituire la directory di lavoro iniziale"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr ""
+"impostazione del descrittore file in modalità testo/binario non riuscita"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "\""
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "\""
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Successo"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Nessuna corrispondenza"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Espressione regolare non valida"
+
+# (ndt) http://en.wikipedia.org/wiki/Collation
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Carattere di collazione non valido"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Nome classe del carattere non valido"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Backslash finale"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Riferimento all'indietro non valido"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "[, [^, [:, [., o [= senza corrispondenza"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "( o \\( senza corrispondenza"
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "\\{ senza corrispondenza"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Contenuto di \\{\\} non valido"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Limite massimo non valido"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Memoria esaurita"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Espressione regolare precedente non valida"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Fine prematura dell'espressione regolare"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Espressione regolare troppo grande"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ") o \\) senza corrispondenza"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Nessuna espressione regolare precedente"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Pacchetto creato da %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Pacchetto creato da %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Licenza GPLv3+: GNU GPL versione 3 o successiva <%s>.\n"
+"Questo programma è software libero: siete liberi di modificarlo e "
+"ridistribuirlo.\n"
+"Non c'è ALCUNA GARANZIA, per quanto consentito dalle vigenti normative.\n"
+"\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Scritto da %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Scritto da %s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Scritto da %s, %s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Scritto da %s, %s, %s\n"
+"e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Scritto da %s, %s, %s,\n"
+"%s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Scritto da %s, %s, %s,\n"
+"%s, %s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Scritto da %s, %s, %s,\n"
+"%s, %s, %s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Scritto da %s, %s, %s,\n"
+"%s, %s, %s, %s\n"
+"e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Scritto da %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Scritto da %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s e altri.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "Segnalare i bug a: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Segnalare i bug di %s a: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Sito web di %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Pagina di aiuto per l'utilizzo di software GNU: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(standard input)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "argomento della lunghezza del contesto non valido"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "l'input è troppo grande per essere contato"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: il file binario corrisponde"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: attenzione: ciclo ricorsivo di directory"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: il file di input è anche l'output"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Uso: %s [OPZIONE]... MODELLI [FILE]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Usare \"%s --help\" per ulteriori informazioni.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Cerca MODELLI in ogni FILE\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Esempio: %s -i \"ciao mondo\" menu.h main.c\n"
+"MODELLI può contenere diversi modelli separati da newline.\n"
+"\n"
+"Selezione e interpretazione del modello:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     MODELLI sono espressioni regolari estese\n"
+"  -F, --fixed-strings       MODELLI sono stringhe\n"
+"  -G, --basic-regexp        MODELLI sono espressioni regolari semplici\n"
+"  -P, --perl-regexp         MODELLI sono espressioni regolari Perl\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=MODELLI      Usa MODELLI per la corrispondenza\n"
+"  -f, --file=FILE           Ottiene i MODELLI dal FILE\n"
+"  -i, --ignore-case         Ignora la distinzione maiuscole/minuscole\n"
+"      --no-ignore-case      Non ignora la distinzione maiuscole/minuscole\n"
+"                            (predefinito)\n"
+"  -w, --word-regexp         Corrispondere solo a parole intere\n"
+"  -x, --line-regexp         Corrispondere solo a righe intere\n"
+"  -z, --null-data           Una riga di dati termina con il byte 0 invece "
+"che\n"
+"                            newline\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Varie:\n"
+"  -s, --no-messages         Elimina i messaggi di errore\n"
+"  -v, --invert-match        Seleziona le righe che non corrispondono\n"
+"  -V, --version             Stampa la versione ed esce\n"
+"      --help                Visualizza questo aiuto ed esce\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Controllo dell'output:\n"
+"  -m, --max-count=NUM       Si ferma dopo NUM righe selezionate\n"
+"  -b, --byte-offset         Stampa l'offset del byte con le righe di output\n"
+"  -n, --line-number         Stampa il numero della riga con le righe di "
+"output\n"
+"      --line-buffered       Esegue il flush dell'output con ogni riga\n"
+"  -H, --with-filename       Stampa il nome del file con le righe di output\n"
+"  -h, --no-filename         Elimina il nome del file dall'output\n"
+"      --label=ETICH         Usa ETICH come nome del file per lo standard "
+"input\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       Mostra solo la parte della riga che corrisponde\n"
+"  -q, --quiet, --silent     Elimina tutto l'output normale\n"
+"      --binary-files=TIPO   Suppone che i file binari siano del TIPO \"binary"
+"\",\n"
+"                            \"text\" oppure \"without-match\"\n"
+"  -a, --text                Equivale a --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        Equivale a --binary-files=without-match\n"
+"  -d, --directories=AZIONE  Come gestire le directory: AZIONE è \"read\",\n"
+"                            \"recurse\" o \"skip\"\n"
+"  -D, --devices=AZIONE      Come gestire device, FIFO e socket: AZIONE è\n"
+"                            \"read\" o \"skip\"\n"
+"  -r, --recursive           Equivale a --directories=recurse\n"
+"  -R, --dereference-recursive\n"
+"                            Simile al precedente, ma segue i collegamenti\n"
+"                            simbolici\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=GLOB        Esamina solo i file corrispondenti a GLOB "
+"(modello di file)\n"
+"      --exclude=GLOB        Salta file corrispondenti a GLOB\n"
+"      --exclude-from=FILE   Salta i file corrispondenti ai modelli nel FILE\n"
+"      --exclude-dir=GLOB    Salta le directory corrispondenti a GLOB\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match Stampa solo i nomi dei FILE senza righe "
+"selezionate\n"
+"  -l, --files-with-matches  Stampa solo i nomi dei FILE con righe "
+"selezionate\n"
+"  -c, --count               Stampa solo il conteggio delle righe selezionate "
+"in\n"
+"                            ogni FILE\n"
+"  -T, --initial-tab         Allinea le tabulazioni (se necessario)\n"
+"  -Z, --null                Stampa il byte 0 dopo ogni nome di FILE\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Controllo del contesto:\n"
+"  -B, --before-context=NUM  Stampa NUM righe di contesto precedente\n"
+"  -A, --after-context=NUM   Stampa NUM righe di contesto seguente\n"
+"  -C, --context=NUM         Stampa NUM righe di contesto dell'output\n"
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NUM                      Come --context=NUM\n"
+"      --color[=QUANDO],\n"
+"      --colour[=QUANDO]     Usa i colori per distinguere le stringhe\n"
+"                            corrispondenti; QUANDO può essere \"always\", "
+"\"never\"\n"
+"                            o \"auto\"\n"
+"  -U, --binary              Non rimuove i caratteri CR all'EOL (MSDOS/"
+"Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Se FILE è \"-\", legge lo standard input; se non c'è alcun FILE, legge \".\" "
+"se in\n"
+"modalità ricorsiva, altrimenti \"-\". Se sono stati specificati meno di due "
+"FILE\n"
+"presume -h. Esce con lo stato 0 se è stata selezionata almeno una riga,\n"
+"1 altrimenti. Se si verifica un errore e l'opzione -q non è\n"
+"stata usata, lo stato di uscita è 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "specificate corrispondenze in conflitto"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"Corrispondenze Perl non supportate: questo binario è compilato con --disable-"
+"perl-regexp"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "corrispondenza %s non valida"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "metodo per i device sconosciuto"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "numero massimo non valido"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "tipo di file binario sconosciuto"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Creato da Mike Haertel e altri; consultare\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "impossibile allocare memoria per lo stack PCRE JIT"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P supporta solamente lingue unibyte e UTF-8"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "l'opzione -P supporta un solo modello"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "errore interno (non si dovrebbe mai verificare)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "limite di lunghezza riga PCRE raggiunto"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: memoria esaurita"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: stack JIT PCRE esaurito"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: limite di backtrack PCRE raggiunto"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: limite di ricorsione PCRE superato"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: errore interno PCRE: %d"
diff --git a/src/grep/po/ja.gmo b/src/grep/po/ja.gmo
new file mode 100644
index 0000000..fa3f6fb
--- /dev/null
+++ b/src/grep/po/ja.gmo
diff --git a/src/grep/po/ja.po b/src/grep/po/ja.po
new file mode 100644
index 0000000..3952c36
--- /dev/null
+++ b/src/grep/po/ja.po
@@ -0,0 +1,1445 @@
+# Japanese messages for GNU grep
+# Copyright (C) 1996, 2014 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# IIDA Yosiaki <iida@gnu.org>, 1999, 2000, 2001, 2002.
+# Yasuyuki Furukawa <yasu@on.cs.keio.ac.jp>, 1997
+# and taken over on 1999-09-24 by IIDA.
+# Special thanks to
+# Daisuke Yamashita <yamad@mb.infoweb.ne.jp>, 1999.
+# Masahito Yamaga <yamaga@ipc.chiba-u.ac.jp>, 2002.
+# GOTO Masanori <gotom@debian.or.jp>, 2006.
+#  derived from the version by Yasuyuki Furukawa <yasu@on.cs.keio.ac.jp> 1998.
+#                              Jun Nishii <jun@flatout.org> 1999.
+#                              Daisuke Yamashita <yamad@mb.infoweb.ne.jp> 1999.
+# Yasuaki Taniguchi <yasuakit@gmail.com>, 2010, 2011, 2014, 2017.
+msgid ""
+msgstr ""
+"Project-Id-Version: GNU grep 3.0.23-b00\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2017-06-25 20:16+0900\n"
+"Last-Translator: Yasuaki Taniguchi <yasuakit@gmail.com>\n"
+"Language-Team: Japanese <translation-team-ja@lists.sourceforge.net>\n"
+"Language: ja\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"Plural-Forms: nplurals=1; plural=0;\n"
+"X-Generator: Poedit 2.0.2\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "%2$s に対する引数 %1$s が間違っています"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "%2$s に対する引数 %1$s が曖昧です"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "有効な引数:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "プログラムエラー"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "スタックオーバーフロー"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "書き込みエラー"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "対応がとれていない [ です"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "無効な文字クラス名です"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "文字クラスの構文は [[:space:]] です。 [:space:] ではありません"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "\\ エスケープが終了していません"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "\\{\\} の中身が無効です"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "正規表現が大きすぎます"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "対応がとれていない ( です"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "構文が指定されていません"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "対応がとれていない ) です"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "不明なシステムエラー"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: オプション '%s%s' は曖昧です\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: オプション '%s%s' は曖昧です。次のものが可能です:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: オプション '%s%s' を認識できません\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: オプション '%s%s' は引数を取ることができません\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: オプション '%s%s' は引数が必要です\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: 無効なオプション -- '%c'\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: オプションには引数が必要です -- '%c'\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "メモリを使い果たしました"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "現在の作業ディレクトリーを記録することができません"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "初期作業ディレクトリーに戻るのに失敗しました"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "ファイル記述子をテキスト/バイナリモードに設定できませんでした"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "`"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "'"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "成功です"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "一致しません"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "無効な正規表現です"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "無効な照合文字です"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "無効な文字クラス名です"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "終端のバックスラッシュ"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "無効な前方参照です"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "[、[^、[:、[.、または [= が不一致です"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "( または \\( が不一致です"
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "\\{ が不一致です"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "\\{\\} の中身が無効です"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "無効な範囲終了です"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "メモリを使い果たしました"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "無効な前方正規表現です"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "正規表現が途中で終了しました"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "正規表現が大きすぎます"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ") または \\) が不一致です"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "以前に正規表現がありません"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "パッケージ作成者: %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "パッケージ作成者: %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "(C)"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, fuzzy, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"\n"
+"ライセンス GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl."
+"html>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+"\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "作者 %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "作者 %s および %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "作者 %s、 %s、および %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"作者 %s、 %s、 %s、\n"
+"および %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"作者 %s、 %s、 %s、\n"
+"%s、および %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"作者 %s、 %s、 %s、\n"
+"%s、 %s、および %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"作者 %s、 %s、 %s、\n"
+"%s、 %s、 %s、および %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"作者 %s、 %s、 %s、\n"
+"%s、 %s、 %s、 %s、\n"
+"および %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"作者 %s、 %s、 %s、\n"
+"%s、 %s、 %s、 %s、\n"
+"%s、および %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"作者 %s、 %s、 %s、\n"
+"%s、 %s、 %s、 %s、\n"
+"%s、 %s、 および他の方々。\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, fuzzy, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"\n"
+"バグを発見したら <%s> に報告して下さい。\n"
+"翻訳に関するバグは<translation-team-ja@lists.sourceforge.net>に報告してくださ"
+"い。\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr ""
+"%s のバグを発見したら <%s> に報告して下さい。\n"
+"翻訳に関するバグは<translation-team-ja@lists.sourceforge.net>に報告してくださ"
+"い。\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "%s のホームページ: <%s>\n"
+
+#: lib/version-etc.c:260
+#, fuzzy, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr ""
+"GNU ソフトウェアを使用する際の一般的なヘルプ: <http://www.gnu.org/gethelp/>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(標準入力)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "一致した前後の行の表示に関する引数が無効です"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "入力が大きすぎて数えられません"
+
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "バイナリファイル %s に一致しました\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "ディレクトリーが再帰的ループをしています"
+
+#: src/grep.c:1899
+#, fuzzy, c-format
+msgid "%s: input file is also the output"
+msgstr "入力ファイル %s が出力にもなっています"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, fuzzy, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "使用法: %s [OPTION]... PATTERN [FILE]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "詳しくは'%s --help'を実行してください。\n"
+
+#: src/grep.c:1969
+#, fuzzy, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "各 FILE 内で PATTERN を検索します。\n"
+
+#: src/grep.c:1970
+#, fuzzy, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"例: %s -i 'hello world' menu.h main.c\n"
+"\n"
+"パターンの選択および解釈:\n"
+
+#: src/grep.c:1975
+#, fuzzy, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     PATTERN を拡張正規表現とする\n"
+"  -F, --fixed-strings       PATTERN を改行で区切られた文字列の組とする\n"
+"  -G, --basic-regexp        PATTERN を基本正規表現とする(デフォルト)\n"
+"  -P, --perl-regexp         PATTERN を Perl 正規表現とする\n"
+
+#: src/grep.c:1981
+#, fuzzy, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=PATTERN      一致処理に PATTERN を使用する\n"
+"  -f, --file=FILE           FILE から PATTERN を取得する\n"
+"  -i, --ignore-case         大文字と小文字を区別しない\n"
+"  -w, --word-regexp         強制的に単語全体で PATTERN の一致処理を行う\n"
+"  -x, --line-regexp         強制的に行全体で PATTERN の一致処理を行う\n"
+"  -z, --null-data           データの行末を改行ではなく NULL とする\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"その他:\n"
+"  -s, --no-messages         エラーメッセージを抑止する\n"
+"  -v, --invert-match        一致しない行を選択する\n"
+"  -V, --version             バージョン情報を表示して終了する\n"
+"      --help                このヘルプを表示して終了する\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"出力の制御:\n"
+"  -m, --max-count=NUM       NUM 行一致後に中断する\n"
+"  -b, --byte-offset         出力行と併せてバイトオフセットを表示する\n"
+"  -n, --line-number         出力行と併せて行番号を表示する\n"
+"      --line-buffered       行ごとに出力を flush する\n"
+"  -H, --with-filename       出力行と併せてファイル名を表示する\n"
+"  -h, --no-filename         出力の先頭にファイル名を付けない\n"
+"      --label=LABEL         標準入力のファイル名の接頭辞として LABEL を使用す"
+"る\n"
+
+#: src/grep.c:2007
+#, fuzzy, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       行の中で PATTERN に一致した部分のみ表示する\n"
+"  -q, --quiet, --silent     通常出力を全て抑止する\n"
+"      --binary-files=TYPE   バイナリファイルの形式を TYPE と仮定する\n"
+"                            TYPE は 'binary'、'text' または 'without-match'\n"
+"  -a, --text                --binary-files=text と等価\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        --binary-files=without-match と等価\n"
+"  -d, --directories=ACTION  ディレクトリーの扱い方を指定する\n"
+"                            ACTION は 'read'、'recurse' または 'skip'\n"
+"  -D, --devices=ACTION      デバイス、FIFO およびソケットの扱い方を指定する\n"
+"                            ACTION は `read' または `skip'\n"
+"  -r, --recursive           --directories=recurse と等価\n"
+"  -R, --dereference-recursive  上と同様だがシンボリックリンクを辿る\n"
+
+#: src/grep.c:2023
+#, fuzzy, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=FILE_PATTERN  FILE_PATTERN に一致したファイルのみ検索する\n"
+"      --exclude=FILE_PATTERN  FILE_PATTERN 一致したファイル・ディレクトリーを"
+"スキップする\n"
+"      --exclude-from=FILE   FILE から読み込んだファイル名のパターンに一致する"
+"ファイルをスキップする\n"
+"      --exclude-dir=PATTERN  PATTERN に一致したディレクトリーをスキップする\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match  PATTERN に一致しない FILE の名前のみ表示する\n"
+"  -l, --files-with-matches  PATTERN に一致する FILE の名前のみ表示する\n"
+"  -c, --count               FILE ごとに一致した行数のみ表示する\n"
+"  -T, --initial-tab         タブを使用して整列する (必要な場合)\n"
+"  -Z, --null                FILE の名前を表示した後に値が 0 のバイトを出力す"
+"る\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"前後の表示に関する制御:\n"
+"  -B, --before-context=NUM  一致した前の NUM 行を表示する\n"
+"  -A, --after-context=NUM   一致した後の NUM 行を表示する\n"
+"  -C, --context=NUM         一致した前後 NUM 行を表示する\n"
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NUM                      --context=NUM と等価\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       一致した文字列をハイライトするための印を使用す"
+"る。\n"
+"                            WHEN は 'always'、'never' または 'auto'\n"
+"  -U, --binary              行末にある CR を削除しない (MSDOS/Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, fuzzy, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"FILE が '-' の場合、標準入力から読み込みます。FILE を指定しない場合、ディレク"
+"トリーを再帰的に\n"
+"処理する場合は '.'、それ以外は '-' となります。FILE を1個だけ指定した場合は -"
+"h も有効になります。\n"
+"終了コードは、行が選択された場合は 0、それ以外は 1 です。エラーが発生して -q "
+"を指定していない\n"
+"場合の終了コードは 2 になります。\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "指定した一致処理系が競合しています"
+
+#: src/grep.c:2101
+#, fuzzy
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"このバイナリは --disable-perl-regexp 付きでコンパイルされているため -P オプ"
+"ションはサポートしません"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "%s は無効な一致処理系です"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "デバイスに対する不明な操作です"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "無効な一致回数です"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "不明なバイナリファイルの形式です"
+
+#: src/grep.c:2829
+#, fuzzy
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"その他の方々は <http://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS> を参照して"
+"ください"
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "PCRE JIT スタックへのメモリ割り当てに失敗しました"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P は1バイトの UTF-8 ロケールのみサポートします"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "-P オプションは単一のパターンしかサポートしません"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "内部エラー (決して発生しないはず)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "PCRE の行長制限を超過しました"
+
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "メモリを使い果たしました"
+
+#: src/pcresearch.c:310
+#, fuzzy, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "PCRE JIT スタックを使い果たしました"
+
+#: src/pcresearch.c:315
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "PCRE のバックスラッシュ制限を超過しました"
+
+#: src/pcresearch.c:319
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "PCRE のバックスラッシュ制限を超過しました"
+
+#: src/pcresearch.c:327
+#, fuzzy, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "PCRE 内部エラー: %d"
+
+#, c-format
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr ""
+#~ "警告: GREP_OPTIONS は廃止されました。alias またはスクリプトを使用してくだ"
+#~ "さい"
+
+#, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "警告: %s: %s"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "引数 '%3$s' に対して %1$s%2$s が無効です"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "引数 '%3$s' に対して無効な接尾辞 %1$s%2$s です"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "引数 '%3$s' に対する %1$s%2$s が大きすぎます"
+
+#, fuzzy
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "%s のホームページ: <http://www.gnu.org/software/%s/>\n"
+
+#~ msgid "internal error"
+#~ msgstr "内部エラー"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: オプション '--%s' は引数を取ることができません\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: オプション '--%s' を認識できません\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: オプション '-W %s' は曖昧です\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: オプション '-W %s' は引数を取ることができません\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: オプション '-W %s' には引数が必要です\n"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "PATTERN はデフォルトでは基本正規表現 (BRE) です。\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "'egrep' は 'grep -E' を意味します。 'fgrep' は 'grep -F' を意味します。\n"
+#~ "'egrep' または 'fgrep' による直接起動は廃止予定です。\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "lseek に失敗しました"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "繰返し回数が終了していません"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "不正な形式の繰り返し回数です"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "PATTERN は拡張正規表現 (ERE) です。\n"
+
+#~ msgid "Invocation as `egrep' is deprecated; use `grep -E' instead.\n"
+#~ msgstr ""
+#~ "`egrep' という名前での起動は廃止予定です。代わりに `grep -E' を使用してく"
+#~ "ださい。\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr "PATTERN は改行で区切られた固定文字列の組です。\n"
+
+#~ msgid "Invocation as `fgrep' is deprecated; use `grep -F' instead.\n"
+#~ msgstr ""
+#~ "`fgrep' という名前での起動は廃止予定です。代わりに `grep -F' を使用してく"
+#~ "ださい。\n"
+
+#~ msgid "writing output"
+#~ msgstr "出力の書込み"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "GNU Grep のホームページ: <%s>\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s は %s パターン構文の時のみ使用できます"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity needs a value (\"=...\"); "
+#~ "skipped"
+#~ msgstr ""
+#~ "GREP_COLORS=\"%s\" において、\"%s\" には値の代入 (\"=...\") が必要です。ス"
+#~ "キップしました"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity is boolean and cannot take a "
+#~ "value (\"=%s\"); skipped"
+#~ msgstr ""
+#~ "GREP_COLORS=\"%s\" において、\"%s\" は真偽値であり値を代入 (\"=%s\") する"
+#~ "ことはできません。スキップしました"
+
+#~ msgid "in GREP_COLORS=\"%s\", the \"%s\" capacity %s"
+#~ msgstr "GREP_COLORS=\"%s\" において \"%s\" は %s です"
+
+#~ msgid ""
+#~ "stopped processing of ill-formed GREP_COLORS=\"%s\" at remaining "
+#~ "substring \"%s\""
+#~ msgstr ""
+#~ "GREP_COLORS=\"%s\" の形式に誤りがあるため処理を中止しました。残りの部分文"
+#~ "字列は \"%s\" です"
+
+#~ msgid "ARGP_HELP_FMT: %s value is less than or equal to %s"
+#~ msgstr "ARGP_HELP_FMT: %s の値は %s の値以下です"
+
+#~ msgid "%.*s: ARGP_HELP_FMT parameter requires a value"
+#~ msgstr "%.*s: ARGP_HELP_FMT パラメータには値が必要です"
+
+#~ msgid "%.*s: ARGP_HELP_FMT parameter must be positive"
+#~ msgstr "%.*s: ARGP_HELP_FMT パラメータは正の値でなければいけません"
+
+#~ msgid "%.*s: Unknown ARGP_HELP_FMT parameter"
+#~ msgstr "%.*s: 不明な ARGP_HELP_FMT パラメータ"
+
+#~ msgid "Garbage in ARGP_HELP_FMT: %s"
+#~ msgstr "ARGP_HELP_FMT 中にごみがあります: %s"
+
+#~ msgid ""
+#~ "Mandatory or optional arguments to long options are also mandatory or "
+#~ "optional for any corresponding short options."
+#~ msgstr ""
+#~ "長い形式のオプションで必須または任意の引数は、それに対応する短い形式のオプ"
+#~ "ションでも同様に必須または任意です。"
+
+#~ msgid "Usage:"
+#~ msgstr "使用法:"
+
+#~ msgid "  or: "
+#~ msgstr "または: "
+
+#~ msgid " [OPTION...]"
+#~ msgstr " [OPTION...]"
+
+#~ msgid "Report bugs to %s.\n"
+#~ msgstr "バグを発見したら %s 宛に報告して下さい。\n"
+
+#~ msgid "give this help list"
+#~ msgstr "このヘルプを表示する"
+
+#~ msgid "give a short usage message"
+#~ msgstr "短い使用方法を表示する"
+
+#~ msgid "NAME"
+#~ msgstr "名前"
+
+#~ msgid "set the program name"
+#~ msgstr "プログラム名を設定する"
+
+#~ msgid "SECS"
+#~ msgstr "SECS"
+
+#~ msgid "hang for SECS seconds (default 3600)"
+#~ msgstr "SECS 秒でハング (デフォルト 3600)"
+
+#~ msgid "print program version"
+#~ msgstr "プログラムのバージョンを表示する"
+
+#~ msgid "(PROGRAM ERROR) No version known!?"
+#~ msgstr "(プログラムエラー) 不明なバージョン!?"
+
+#~ msgid "%s: Too many arguments\n"
+#~ msgstr "%s: 引数が多すぎます\n"
+
+#~ msgid "(PROGRAM ERROR) Option should have been recognized!?"
+#~ msgstr "(プログラムエラー) オプションは認識されているべきです!?"
+
+#~ msgid "cannot find a temporary directory, try setting $TMPDIR"
+#~ msgstr "一時ディレクトリを作成できません。 $TMPDIR を設定してみてください"
+
+#~ msgid "cannot create a temporary directory using template \"%s\""
+#~ msgstr "テンプレート \"%s\" を使用した一時ディレクトリを作成できません"
+
+#~ msgid "cannot remove temporary file %s"
+#~ msgstr "一時ファイル %s を削除できません"
+
+#~ msgid "cannot remove temporary directory %s"
+#~ msgstr "一時ディレクトリ %s を削除できません"
+
+#~ msgid "error closing file"
+#~ msgstr "ファイルクローズエラー"
+
+#~ msgid "preserving permissions for %s"
+#~ msgstr "%s のパーミッションを保存しています"
+
+#~ msgid "error while opening \"%s\" for reading"
+#~ msgstr "\"%s\"を読込むため開いている際にエラーが発生しました"
+
+#~ msgid "cannot open backup file \"%s\" for writing"
+#~ msgstr "書込み用バックアップファイル\"%s\"を開くことができません"
+
+#~ msgid "error reading \"%s\""
+#~ msgstr "\"%s\"の読込み中にエラーが発生しました"
+
+#~ msgid "error writing \"%s\""
+#~ msgstr "\"%s\"の書込み中にエラーが発生しました"
+
+#~ msgid "error after reading \"%s\""
+#~ msgstr "\"%s\"の読込み後にエラーが発生しました"
+
+#~ msgid "fdopen() failed"
+#~ msgstr "fdopen()に失敗しました"
+
+#~ msgid "C# compiler not found, try installing pnet"
+#~ msgstr "C# コンパイラが見つりません。pnet をインストールしてみてください"
+
+#~ msgid "C# virtual machine not found, try installing pnet"
+#~ msgstr "C# 仮想マシンが見つかりません。pnet をインストールしてみてください"
+
+#~ msgid "%s subprocess failed"
+#~ msgstr "%s サブプロセスが失敗しました"
+
+#~ msgid "regular empty file"
+#~ msgstr "通常の空ファイル"
+
+#~ msgid "regular file"
+#~ msgstr "通常ファイル"
+
+#~ msgid "directory"
+#~ msgstr "ディレクトリ"
+
+#~ msgid "block special file"
+#~ msgstr "ブロックスペシャルファイル"
+
+#~ msgid "character special file"
+#~ msgstr "キャラクタスペシャルファイル"
+
+#~ msgid "fifo"
+#~ msgstr "fifo"
+
+#~ msgid "symbolic link"
+#~ msgstr "シンボリックリンク"
+
+#~ msgid "socket"
+#~ msgstr "ソケット"
+
+#~ msgid "message queue"
+#~ msgstr "メッセージキュー"
+
+#~ msgid "semaphore"
+#~ msgstr "セマフォ"
+
+#~ msgid "shared memory object"
+#~ msgstr "共有メモリオブジェクト"
+
+#~ msgid "typed memory object"
+#~ msgstr "型付メモリオブジェクト"
+
+#~ msgid "weird file"
+#~ msgstr "不明なファイル"
+
+#~ msgid "Address family for hostname not supported"
+#~ msgstr "ホスト名に対する Address family がサポートされていません"
+
+#~ msgid "Temporary failure in name resolution"
+#~ msgstr "名前解決に一時的に失敗しました"
+
+#~ msgid "Bad value for ai_flags"
+#~ msgstr "ai_flags に対する誤った値です"
+
+#~ msgid "Non-recoverable failure in name resolution"
+#~ msgstr "名前解決でリカバリできない失敗が発生しました"
+
+#~ msgid "ai_family not supported"
+#~ msgstr "ai_family はサポートされていません"
+
+#~ msgid "Memory allocation failure"
+#~ msgstr "メモリ配置に失敗しました"
+
+#~ msgid "No address associated with hostname"
+#~ msgstr "ホスト名にアドレスが割り当てられていません"
+
+#~ msgid "Name or service not known"
+#~ msgstr "名前またはサービスが不明です"
+
+#~ msgid "Servname not supported for ai_socktype"
+#~ msgstr "ai_socktype に対して Servname がサポートされていません"
+
+#~ msgid "ai_socktype not supported"
+#~ msgstr "ai_socktype はサポートされていません"
+
+#~ msgid "System error"
+#~ msgstr "システムエラー"
+
+#~ msgid "Argument buffer too small"
+#~ msgstr "引数バッファが小さすぎます"
+
+#~ msgid "Processing request in progress"
+#~ msgstr "要求された処理は実行中です"
+
+#~ msgid "Request canceled"
+#~ msgstr "要求がキャンセルされました"
+
+#~ msgid "Request not canceled"
+#~ msgstr "要求がキャンセルされませんでした"
+
+#~ msgid "All requests done"
+#~ msgstr "すべての要求が完了しました"
+
+#~ msgid "Interrupted by a signal"
+#~ msgstr "シグナル割り込みが発生しました"
+
+#~ msgid "Parameter string not correctly encoded"
+#~ msgstr "パラメーター文字列が正しくエンコードされていません"
+
+#~ msgid "Unknown error"
+#~ msgstr "不明なエラー"
+
+#~ msgid "invalid source_version argument to compile_java_class"
+#~ msgstr "compile_java_class への source_version 引数が無効です"
+
+#~ msgid "invalid target_version argument to compile_java_class"
+#~ msgstr "compile_java_class への target_version 引数が無効です"
+
+#~ msgid "failed to create \"%s\""
+#~ msgstr "\"%s\" の作成に失敗しました"
+
+#~ msgid "error while writing \"%s\" file"
+#~ msgstr "\"%s\" ファイルの書き込み中にエラーが発生しました"
+
+#~ msgid "Java compiler not found, try installing gcj or set $JAVAC"
+#~ msgstr ""
+#~ "Java コンパイラが見つかりません。 gcj をインストールするか、またはt "
+#~ "$JAVAC を設定してみてください"
+
+#~ msgid "Java virtual machine not found, try installing gij or set $JAVA"
+#~ msgstr ""
+#~ "Java 仮想マシンが見つかりません。 gij をインストールするか、または $JAVA "
+#~ "を設定してみてください"
+
+#~ msgid "%s subprocess I/O error"
+#~ msgstr "%s サブプロセス I/O エラー"
+
+#~ msgid "cannot change permissions of %s"
+#~ msgstr "%s のパーミッションを変更できません"
+
+#~ msgid "cannot create directory %s"
+#~ msgstr "ディレクトリ %s を作成できません"
+
+#~ msgid "Failed to open /dev/zero for read"
+#~ msgstr "/dev/zeroを読込み用に開けません"
+
+#~ msgid "creation of reading thread failed"
+#~ msgstr "読み込みスレッドの作成に失敗しました"
+
+#~ msgid "cannot set up nonblocking I/O to %s subprocess"
+#~ msgstr "%s 子プロセスへ非ブロック I/O を設定できません"
+
+#~ msgid "communication with %s subprocess failed"
+#~ msgstr "%s 子プロセスとの通信に失敗しました"
+
+#~ msgid "write to %s subprocess failed"
+#~ msgstr "%s 子プロセスへの書き込みに失敗しました"
+
+#~ msgid "read from %s subprocess failed"
+#~ msgstr "%s 子プロセスからの読み込みに失敗しました"
+
+#~ msgid "subprocess %s terminated with exit code %d"
+#~ msgstr "子プロセス %s が終了コード %d で終了しました"
+
+#~ msgid "creation of threads failed"
+#~ msgstr "スレッドの作成に失敗しました"
+
+#~ msgid "%s subprocess terminated with exit code %d"
+#~ msgstr "%s 子プロセスが終了コード %d で終了しました"
+
+#~ msgid "cannot create pipe"
+#~ msgstr "パイプを作成できません"
+
+#~ msgid "^[yY]"
+#~ msgstr "^[yY]"
+
+#~ msgid "^[nN]"
+#~ msgstr "^[nN]"
+
+#~ msgid "setting permissions for %s"
+#~ msgstr "%s のパーミッションを設定します"
+
+#~ msgid "Hangup"
+#~ msgstr "Hangup"
+
+#~ msgid "Interrupt"
+#~ msgstr "割り込み"
+
+#~ msgid "Quit"
+#~ msgstr "終了"
+
+#~ msgid "Illegal instruction"
+#~ msgstr "Illegal instruction"
+
+#~ msgid "Trace/breakpoint trap"
+#~ msgstr "Trace/breakpoint trap"
+
+#~ msgid "Aborted"
+#~ msgstr "中止"
+
+#~ msgid "Floating point exception"
+#~ msgstr "浮動小数点例外"
+
+#~ msgid "Killed"
+#~ msgstr "強制終了"
+
+#~ msgid "Bus error"
+#~ msgstr "バスエラー"
+
+#~ msgid "Segmentation fault"
+#~ msgstr "Segmentation fault"
+
+#~ msgid "Broken pipe"
+#~ msgstr "Broken pipe"
+
+#~ msgid "Alarm clock"
+#~ msgstr "Alarm clock"
+
+#~ msgid "Terminated"
+#~ msgstr "Terminated"
+
+#~ msgid "Urgent I/O condition"
+#~ msgstr "緊急 I/O 状態"
+
+#~ msgid "Stopped (signal)"
+#~ msgstr "停止 (シグナル)"
+
+#~ msgid "Stopped"
+#~ msgstr "停止"
+
+#~ msgid "Continued"
+#~ msgstr "継続"
+
+#~ msgid "Child exited"
+#~ msgstr "子プロセス終了"
+
+#~ msgid "Stopped (tty input)"
+#~ msgstr "停止 (tty 入力)"
+
+#~ msgid "Stopped (tty output)"
+#~ msgstr "停止 (tty 出力)"
+
+#~ msgid "I/O possible"
+#~ msgstr "I/O 可能"
+
+#~ msgid "CPU time limit exceeded"
+#~ msgstr "CPU時間制限を超過しました"
+
+#~ msgid "File size limit exceeded"
+#~ msgstr "ファイルサイズ制限を超過しました"
+
+#~ msgid "Virtual timer expired"
+#~ msgstr "仮想タイマーが終了しました"
+
+#~ msgid "Profiling timer expired"
+#~ msgstr "プロファイリングタイマーが終了しました"
+
+#~ msgid "Window changed"
+#~ msgstr "Window が変更されました"
+
+#~ msgid "User defined signal 1"
+#~ msgstr "ユーザー定義シグナル1"
+
+#~ msgid "User defined signal 2"
+#~ msgstr "ユーザー定義シグナル2"
+
+#~ msgid "EMT trap"
+#~ msgstr "EMT トラップ"
+
+#~ msgid "Bad system call"
+#~ msgstr "間違ったシステムコール"
+
+#~ msgid "Stack fault"
+#~ msgstr "スタックエラー"
+
+#~ msgid "Information request"
+#~ msgstr "情報要求"
+
+#~ msgid "Power failure"
+#~ msgstr "電源エラー"
+
+#~ msgid "Resource lost"
+#~ msgstr "リソースが無くなりました"
+
+#~ msgid "error writing to a closed pipe or socket"
+#~ msgstr "閉じたパイプまたはソケットへの書き込みでエラーが発生しました"
+
+#~ msgid "Real-time signal %d"
+#~ msgstr "リアルタイムシグナル %d"
+
+#~ msgid "Unknown signal %d"
+#~ msgstr "不明なシグナル %d"
+
+#~ msgid "iconv function not usable"
+#~ msgstr "iconv 関数が使えません"
+
+#~ msgid "iconv function not available"
+#~ msgstr "iconv 関数が有効ではありません"
+
+#~ msgid "character out of range"
+#~ msgstr "範囲外の文字"
+
+#~ msgid "cannot convert U+%04X to local character set"
+#~ msgstr "U+%04X をローカル文字セットに変換できません"
+
+#~ msgid "cannot convert U+%04X to local character set: %s"
+#~ msgstr "U+%04X をローカル文字セット %s に変換できません"
+
+#~ msgid "invalid spec"
+#~ msgstr "無効な指定"
+
+#~ msgid "unable to display error message"
+#~ msgstr "エラーメッセージを表示できません"
+
+#~ msgid "_open_osfhandle failed"
+#~ msgstr "_open_osfhandle に失敗しました"
+
+#~ msgid "cannot restore fd %d: dup2 failed"
+#~ msgstr "ファイル記述子 (fd) %d をリストアできません: dup2 に失敗しました"
+
+#~ msgid "%s subprocess"
+#~ msgstr "%s 子プロセス"
+
+#~ msgid "%s subprocess got fatal signal %d"
+#~ msgstr "%s 子プロセスが致命的なシグナル %d を受信しました"
+
+#~ msgid "stdin"
+#~ msgstr "標準入力"
+
+#~ msgid "stdout"
+#~ msgstr "標準出力"
+
+#~ msgid "stderr"
+#~ msgstr "標準エラー出力"
+
+#~ msgid "unknown stream"
+#~ msgstr "不明なストリーム"
+
+#~ msgid "failed to reopen %s with mode %s"
+#~ msgstr "%s をモード %s で再度開くことに失敗しました"
+
+#~ msgid "string comparison failed"
+#~ msgstr "文字列の比較に失敗しました"
+
+#~ msgid "Set LC_ALL='C' to work around the problem."
+#~ msgstr "問題を回避するために LC_ALL='C' を指定してください."
+
+#~ msgid "The strings compared were %s and %s."
+#~ msgstr "比較した文字列は %s と %s です."
+
+#~ msgid "cannot perform formatted output"
+#~ msgstr "書式設定を行った出力を実行することができません"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: 不正なオプション -- %c\n"
+
+#~ msgid "block size"
+#~ msgstr "ブロックサイズ"
+
+#~ msgid "%s exists but is not a directory"
+#~ msgstr "%s は存在しますがディレクトリではありません"
+
+#~ msgid "cannot change owner and/or group of %s"
+#~ msgstr "%s のオーナーとグループを変更できません"
+
+#~ msgid "cannot chdir to directory %s"
+#~ msgstr "ディレクトリ %s に移動できません"
+
+#~ msgid "cannot get the login group of a numeric UID"
+#~ msgstr "数字のUIDのログイングループを取得できません"
+
+#~ msgid ""
+#~ "\n"
+#~ "This is free software.  You may redistribute copies of it under the terms "
+#~ "of\n"
+#~ "the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.\n"
+#~ "There is NO WARRANTY, to the extent permitted by law.\n"
+#~ "\n"
+#~ msgstr ""
+#~ "\n"
+#~ "本プログラムはフリーソフトウェアです. GNU一般公有使用許諾\n"
+#~ "<http://www.gnu.org/licenses/gpl.html> で定められた条項の下で本プログラ\n"
+#~ "ムのコピーを再配布できます. 適切な法が認る限りにおいて全くの無保証です.\n"
+#~ "\n"
+
+#~ msgid "out of memory"
+#~ msgstr "メモリーがなくなりました"
+
+#~ msgid "Usage: %s [OPTION]... PATTERN [FILE] ...\n"
+#~ msgstr "使用法: %s [オプション]‥‥ パターン [ファイル] ‥‥\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE\n"
+#~ "                            TYPE is 'binary', 'text', or 'without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories\n"
+#~ "                            ACTION is 'read', 'recurse', or 'skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets\n"
+#~ "                            ACTION is 'read' or 'skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=PATTERN     files that match PATTERN will be examined\n"
+#~ "      --exclude=PATTERN     files that match PATTERN will be skipped.\n"
+#~ "      --exclude-from=FILE   files that match PATTERN in FILE will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match only print FILE names containing no match\n"
+#~ "  -l, --files-with-matches  only print FILE names containing matches\n"
+#~ "  -c, --count               only print a count of matching lines per "
+#~ "FILE\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "出力制御:\n"
+#~ "  -m, --max-count=回数      指定した一致回数の後、終了する\n"
+#~ "  -b, --byte-offset         出力行にバイト・オフセットも表示する\n"
+#~ "  -n, --line-number         出力行に行数も表示する\n"
+#~ "      --line-buffered       行ごとに出力を掃き出す\n"
+#~ "  -H, --with-filename       各一致にたいしてそのファイル名も表示する\n"
+#~ "  -h, --no-filename         前のファイル名を出力から抑止する\n"
+#~ "      --label=ラベル        ラベルをファイル名として標準出力に表示する\n"
+#~ "  -o, --only-matching       パターンと一致する行の部分だけを示す\n"
+#~ "  -q, --quiet, --silent     通常の出力をすべて抑止する\n"
+#~ "      --binary-files=型     バイナリー・ファイルの型。「binary」\n"
+#~ "                            「text」「without-match」を指定\n"
+#~ "  -a, --text                --binary-files=textと同じ\n"
+#~ "  -I                        --binary-files=without-matchと同じ\n"
+#~ "  -d, --directories=操作    ディレクトリーへの操作\n"
+#~ "                            「read」(読込み)、「recurse」(再帰)、\n"
+#~ "                            「skip」(省略) のいずれかを指定\n"
+#~ "  -D, --devices=操作        デバイス、FIFO、ソケットへの操作\n"
+#~ "                            「read」か「skip」を指定\n"
+#~ "  -R, -r, --recursive       --directories=recurseと同じ\n"
+#~ "      --include=パターン    パターンと一致するファイルを検査する\n"
+#~ "      --exclude=パターン    パターンと一致するファイルを省略する。\n"
+#~ "      --exclude-from=ファイル 指定したファイル内のパターンと\n"
+#~ "                            一致するファイルを省略する。\n"
+#~ "  -L, --files-without-match 一致のなかったファイル名のみを表示する\n"
+#~ "  -l, --files-with-matches  一致したファイル名のみを表示する\n"
+#~ "  -c, --count               ファイルごとに一致した行数のみを表示する\n"
+#~ "  -Z, --null                ファイル名の後に、ヌル値のバイトを表示\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Report bugs to <bug-gnu-utils@gnu.org>.\n"
+#~ msgstr ""
+#~ "\n"
+#~ "バグは <bug-gnu-utils@gnu.org> へ報告してください。\n"
+
+#~ msgid "unknown directories method"
+#~ msgstr "未知のディレクトリー操作です"
+
+#~ msgid "%s (GNU grep) %s\n"
+#~ msgstr "%s (GNU grep) %s\n"
+
+#~ msgid ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+#~ msgstr ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions. There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "これはフリー・ソフトウェアです。複製に関する条件はソースをご覧ください。\n"
+#~ "これは無保証です。営利目的やある特定の目的にむけた適正のものでもありませ"
+#~ "ん。\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "-Pと-zのオプションの組合せはできません"
diff --git a/src/grep/po/ko.gmo b/src/grep/po/ko.gmo
new file mode 100644
index 0000000..276dc49
--- /dev/null
+++ b/src/grep/po/ko.gmo
diff --git a/src/grep/po/ko.po b/src/grep/po/ko.po
new file mode 100644
index 0000000..124fa63
--- /dev/null
+++ b/src/grep/po/ko.po
@@ -0,0 +1,749 @@
+# Korean messages for GNU grep.
+# This file is distributed under the same license as the grep package.
+# Copyright (C) 1996, 1997, 2019 Free Software Foundation, Inc.
+# Bang Jun-Young <bangjy@geocities.com>, 1996-1997.
+# Seong-ho Cho <darkcircle.0426@gmail.com>, 2019-2021.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: GNU grep 3.6.27\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-08-10 10:17+0900\n"
+"Last-Translator: Seong-ho Cho <darkcircle.0426@gmail.com>\n"
+"Language-Team: Korean <translation-team-ko@googlegroups.com>\n"
+"Language: ko\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"X-Generator: Poedit 2.3.1\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "%2$s 대상 잘못된 인자 %1$s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "%2$s 대상 모호한 인자 %1$s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "유효한 인자는 다음과 같습니다:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "프로그램 오류"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "스택 오버플로우"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "기록 오류"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "짝이 맞지 않는 [ 괄호"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "잘못된 문자 클래스"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "문자 클래스 표기 방식은 [:space:]가 아닌 [[:space:]]입니다"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "끝나지 않은 \\ 이스케이프 문자"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "잘못된 \\{\\} 내용"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "정규 표현식이 너무 깁니다"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "짝이 맞지 않는 ( 괄호"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "문법을 지정하지 않았습니다"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "짝이 맞지 않는 ) 괄호"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "알 수 없는 시스템 오류"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: '%s%s' 옵션이 모호합니다\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: '%s%s' 옵션이 모호합니다 가능한 값:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: 인식할 수 없는 옵션 '%s%s'\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: '%s%s' 옵션은 인자를 허용하지 않습니다\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: '%s%s' 옵션은 인자가 필요합니다\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: 잘못된 옵션 -- '%c'\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: 이 옵션은 인자가 필요합니다 -- '%c'\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "메모리가 바닥남"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "현재 작업 디렉터리를 기록할 수 없습니다"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "초기 작업 디렉터리 반환에 실패했습니다"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "텍스트/바이너리 모드 파일 서술자 설정에 실패했습니다"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "`"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "'"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "성공"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "일치 항목 없음"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "잘못된 정규 표현식"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "잘못된 조합 문자"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "잘못된 문자 클래스 이름"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "백 슬래시 문자가 따라옴"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "잘못된 후위 참조"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "일치하지 않는 [, [^, [:, [., [="
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "일치하지 않는 ( 또는 \\( 괄호"
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "일치하지 않는 \\{ 괄호"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "잘못된 \\{\\} 내용"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "잘못된 범위 끝"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "메모리가 바닥남"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "잘못된 선행 정규 표현식"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "정규 표현식 마감 표현이 앞서있습니다"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "정규 표현식이 너무 깁니다"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "일치하지 않는 ) 또는 \\) 괄호"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "이전 정규 표현식 없음"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "%s이(가) 패키징 함 (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "%s이(가) 패키징 함\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "(C)"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"GPLv3+ 라이선스: GNU GPL 버전 3 이상 <%s>.\n"
+"이 프로그램은 자유 소프트웨어입니다: 자유롭게 바꾸고 재배포할 수 있습니다.\n"
+"법률이 허용하는 모든 범위내의 보증은 없습니다.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "%s이(가) 작성함.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "%s와(과) %s이(가) 작성함.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "%s와(과) %s, %s이(가) 작성함.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"%s와(과) %s, %s,\n"
+"%s이(가) 작성함.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"%s와(과) %s, %s,\n"
+"%s, %s이(가) 작성함.\n"
+"\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"%s와(과) %s, %s,\n"
+"%s, %s, %s이(가) 작성함.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"%s와(과) %s, %s,\n"
+"%s, %s, %s,\n"
+"%s이(가) 작성함.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"%s와(과) %s, %s,\n"
+"%s, %s, %s,\n"
+"%s, %s이(가) 작성함.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"%s와(과) %s, %s,\n"
+"%s, %s, %s,\n"
+"%s, %s, %s이(가) 작성함.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"%s, %s, %s,\n"
+"%s, %s, %s,\n"
+"%s, %s, %s\n"
+"외 다수가 작성함.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "버그 보고 주소: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "%s 버그 보고 주소: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "%s 홈 페이지: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "GNU 소프트웨어 활용 일반 도움말: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(표준 입력)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "잘못된 내용 길이 인자"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "입력 행 수를 세기에 너무 많습니다"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: 바이너리 파일 일치함"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: 경고: 재귀 디렉터리 순환"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: 입력 파일은 출력 대상이기도 합니다"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "사용법: %s [<옵션>]... <패턴> [<파일>]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "자세한 정보는 '%s --help'를 입력하십시오.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "각 <파일>에서 <패턴>에 일치하는 행을 검색합니다.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"예제: %s -i 'hello world' menu.h main.c\n"
+"<패턴>에는 개행 문자로 구분한 여러 패턴을 넣을 수 있습니다.\n"
+"\n"
+"패턴 선택 및 해석:\n"
+"\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     <패턴>은 확장 정규 표현식입니다\n"
+"  -F, --fixed-strings       <패턴>은 단순 문자열입니다\n"
+"  -G, --basic-regexp        <패턴>은 기본 정규 표현식입니다\n"
+"  -P, --perl-regexp         <패턴>은 펄 정규 표현식입니다\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=<패턴>       일치하는 부분을 찾을 <패턴> 기준을 활용합니다\n"
+"  -f, --file=<파일>         <파일>에서 <패턴>에 일치하는 부분을 취합니다\n"
+"  -i, --ignore-case         대소문자 구분을 무시합니다\n"
+"      --no-ignore-case      대소문자 구분을 유지합니다(기본값)\n"
+"  -w, --word-regexp         주어진 단어와 완벽하게 일치하는 부분만\n"
+"  -x, --line-regexp         주어진 행 내용과 완벽하게 일치하는 부분만\n"
+"  -z, --null-data           데이터 행의 끝은 개행 문자가 아닌 0바이트 값으로 "
+"끝납니다\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"기타:\n"
+"  -s, --no-messages         오류 메시지 출력을 생략합니다\n"
+"  -v, --invert-match        조건에 일치하지 않는 행을 선택합니다\n"
+"  -V, --version             버전 정보를 나타내고 빠져 나갑니다\n"
+"      --help                이 도움말 텍스트를 나타내고 빠져 나갑니다\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"출력 제어:\n"
+"  -m, --max-count=<횟수>    <횟수> 만큼 행을 찾아내고 나면 멈춤\n"
+"  -b, --byte-offset         출력 행의 바이트 오프셋을 출력합니다\n"
+"  -n, --line-number         출력 행의 행 번호를 출력합니다\n"
+"      --line-buffered       모든 행의 출력을 플러싱합니다\n"
+"  -H, --with-filename       출력 행에 파일 이름을 출력합니다\n"
+"  -h, --no-filename         출력 행 앞부분의 파일 이름 표시를 생략합니다 \n"
+"      --label=<레이블>      <레이블>을 표준 입력 앞부분의 파일 이름으로 사용"
+"합니다\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       조건에 일치하는 행이 비어있지 않은 결과만 나타냅"
+"니다\n"
+"  -q, --quiet, --silent     모든 일반 출력 동작을 생략합니다\n"
+"      --binary-files=<형식>   바이너리 파일을 지정한 <형식>으로 간주합니다\n"
+"                            <형식> 값은 'binary', 'text', 'without-match' 중 "
+"하나입니다\n"
+"  -a, --text                --binary-files=text 옵션과 동일\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        --binary-files=without-match 옵션과 동일\n"
+"  -d, --directories=<동작>  디렉터리 처리 방식\n"
+"                            <동작> 값은 'read', 'recurse', 'skip' 중 하나입니"
+"다\n"
+"  -D, --devices=<동작>      장치, FIFO, 소켓 처리 방식\n"
+"                            <동작> 값은 'read', 'skip' 중 하나입니다\n"
+"  -r, --recursive           --directories=recurse와 유사\n"
+"  -R, --dereference-recursive  위 옵션과 비슷하지만 모든 심볼릭 링크를 따라갑"
+"니다\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=<글롭>        <글롭>(파일 패턴)에 일치하는 파일만 검색합니"
+"다\n"
+"      --exclude=<글롭>        <글롭>에 일치하는 파일을 건너뜁니다\n"
+"      --exclude-from=<파일>   <파일>과 파일 패턴이 일치하는 파일을 건너뜁니"
+"다\n"
+"      --exclude-dir=<글롭>    <글롭>과 일치하는 디렉터리를 건너뜁니다\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match 일치하는 행이 없으면 <파일>의 이름만 출력합니다\n"
+"  -l, --files-with-matches  일치하는 행이 있는 <파일>의 이름만 출력합니다\n"
+"  -c, --count               <파일>에 일치하는 행 갯수만 출력합니다\n"
+"  -T, --initial-tab         (필요한 경우) 행 별로 탭을 표시합니다\n"
+"  -Z, --null                <파일> 이름 뒤에 0 바이트 값을 출력합니다\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"문맥 제어:\n"
+"  -B, --before-context=<갯수>  <갯수> 줄 수만큼 출력 내용의 앞부분을 출력합니"
+"다\n"
+"  -A, --after-context=<갯수>   <갯수> 줄 수만큼 출력 내용의 뒷부분을 출력합니"
+"다\n"
+"  -C, --context=<갯수>         <갯수> 줄 수 만큼 출력 내용 앞 뒤 부분을 모두 "
+"출력합니다 \n"
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NUM                      --context=<갯수>와 동일\n"
+"      --group-separator=<구분자>  문맥상 일치하는 행을 <구분자> 출력으로 구"
+"분\n"
+"      --no-group-separator  일치 문맥에 대한 구분자를 출력하지 않습니다\n"
+"      --color[=<시기>],\n"
+"      --colour[=<시기>]     일치하는 문자열 강조시 마커를 활용합니다\n"
+"                            <시기>의 값은 'always', 'never', 'auto' 중 하나입"
+"니다\n"
+"  -U, --binary              개행 문자에서 CR 문자를 빼내지 않음(MSDOS/윈도"
+"우)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"<파일> 값이 '-' 이면, 표준 입력을 읽습니다.  <파일>에 아무런 값이 없다면,\n"
+"재귀 탐색 옵션을 주었을 경우 현재 디렉터리를,  그렇지 않으면 '-' 값을 설정"
+"함\n"
+"으로 가정합니다. <파일> 갯수가 한개일 경우 -h 옵션을 준 것으로 가정합니다.\n"
+"조건 일치 행이 나오면, 끝내기 상태 값은 0을, 그렇지 않으면 1을 반환합니다.\n"
+"오류가 나타났거나 -q 옵션을 주지 않았다면, 2를 반환합니다.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "비교 기준을 중복 지정했습니다"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"--disable-perl-regexp 빌드에서는 Perl 문자열 일치 기능을 지원하지 않습니다"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "잘못된 비교 기준 %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "알 수 없는 장치 방식"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr "경고: --unix-byte-offsets (-u) 옵션은 오래되었습니다"
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "잘못된 최대 갯수"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "알 수 없는 바이너리 파일 형식"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Mike Haertel 등이 작성함. 기타 작성자 정보는\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS> 링크를 참고하십시오."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "PCRE JIT 스택의 메모리 할당에 실패했습니다"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P 유니바이트, UTF-8 로캘만 지원합니다"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "-P 옵션은 단일 패턴만 지원합니다"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "내부 오류 (나타나면 안됨)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "PCRE 행 길이 한계 초과"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: 메모리가 바닥남"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: PCRE JIT 스택 가득 참"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: PCRE 후위 추적 한계 초과"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: PCRE 후위 추적 한계 초과"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: 내부 PCRE 오류: %d"
diff --git a/src/grep/po/ky.gmo b/src/grep/po/ky.gmo
new file mode 100644
index 0000000..1cb818e
--- /dev/null
+++ b/src/grep/po/ky.gmo
diff --git a/src/grep/po/ky.po b/src/grep/po/ky.po
new file mode 100644
index 0000000..9d10b2c
--- /dev/null
+++ b/src/grep/po/ky.po
@@ -0,0 +1,891 @@
+# Translation of grep-2.5.3 messages to Kirghiz/Kyrgyz
+# Copyright (C) 2007 Free Software Foundation, Inc.
+# This file is distributed under the same license as the GREP package.
+# Azilet Beishenaliev <aziletb@gmail.com>, 2007.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 2.5.3\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2007-09-01 17:27+0100\n"
+"Last-Translator: Azilet Beishenaliev <aziletb@gmail.com>\n"
+"Language-Team: Kirghiz <i18n-team-ky-kyrgyz@lists.sourceforge.net>\n"
+"Language: ky\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"Plural-Forms: nplurals=1; plural=0;\n"
+"X-Poedit-Language: Kyrgyz\n"
+"X-Poedit-Country: KYRGYZSTAN\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr ""
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr ""
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr ""
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr ""
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr ""
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr ""
+
+#: lib/dfa.c:896
+#, fuzzy
+msgid "unbalanced ["
+msgstr "[ - мунун уйкашы жок"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr ""
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr ""
+
+# escape - кыргызча???
+#: lib/dfa.c:1210
+#, fuzzy
+msgid "unfinished \\ escape"
+msgstr "Бүтпөй калган эскейп \\"
+
+#: lib/dfa.c:1371
+#, fuzzy
+msgid "invalid content of \\{\\}"
+msgstr "максимум сан жарабайт"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr ""
+
+#: lib/dfa.c:1858
+#, fuzzy
+msgid "unbalanced ("
+msgstr "( - мунун уйкашы жок"
+
+# кайсы синтаксис? грептин шаблонубу?
+#: lib/dfa.c:1975
+#, fuzzy
+msgid "no syntax specified"
+msgstr "Синтаксис аталган жок"
+
+#: lib/dfa.c:1986
+#, fuzzy
+msgid "unbalanced )"
+msgstr ") - мунун уйкашы жок"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Белгисиз система катасы"
+
+#: lib/getopt.c:278
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: `%s' опциясы так эмес\n"
+
+#: lib/getopt.c:284
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: `%s' опциясы так эмес\n"
+
+#: lib/getopt.c:319
+#, fuzzy, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: бул опция түшүнүксүз `%c%s'\n"
+
+#: lib/getopt.c:345
+#, fuzzy, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: `%c%s' опциясы менен аргумент колдонулбайт\n"
+
+#: lib/getopt.c:360
+#, fuzzy, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: `%s' опциясы менен аргумент болуш керек\n"
+
+#: lib/getopt.c:621
+#, fuzzy, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: жараксыз опция -- %c\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, fuzzy, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: бул опциянын аргументи болуш керек -- %c\n"
+
+# Памятты эмне дейбиз яя? ;)
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "память жетпей калды"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr ""
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr ""
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr ""
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "\""
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "\""
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr ""
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr ""
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr ""
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr ""
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr ""
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr ""
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr ""
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr ""
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr ""
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr ""
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr ""
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr ""
+
+# Памятты эмне дейбиз яя? ;)
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Память жетпей калды"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr ""
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr ""
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr ""
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ""
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr ""
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr ""
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr ""
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr ""
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, fuzzy, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"\n"
+"Каталарды бул жерге жибергиле <%s>.\n"
+
+#: lib/version-etc.c:251
+#, fuzzy, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr ""
+"\n"
+"Каталарды бул жерге жибергиле <%s>.\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr ""
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr ""
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(стандарт кирүү)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "контекст узундугу жарабайт"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "берилген данныйлардын саны саналбай турганча көп"
+
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "Экилик форматтагы %s файлы уйкашат\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "бирибирине кирген папка айлампасы бар"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr ""
+
+#: src/grep.c:1961 src/grep.c:1968
+#, fuzzy, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Колдонулушу: %s [ОПЦИЯ]... ШАБЛОН [ФАЙЛ]...\n"
+
+#: src/grep.c:1963
+#, fuzzy, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Толук маалымат үчүн `%s --help' деп жазгыла.\n"
+
+#: src/grep.c:1969
+#, fuzzy, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Ар ФАЙЛда же стандарт кирүүдө ШАБЛОНду изде.\n"
+
+# выражение дегендин кыргызчасын жазыш керек
+#: src/grep.c:1970
+#, fuzzy, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Мисалы: %s -i 'салам дүйнө' menu.h main.c\n"
+"\n"
+"Регулярдуу выражение тандоо жана мааниси:\n"
+
+# выражение - кыргызчасын жаз!!!!
+#: src/grep.c:1975
+#, fuzzy, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     ШАБЛОН кеңейтилген түрдөгү регулярдуу выражение\n"
+"  -F, --fixed-strings       ШАБЛОН ар сапта бир сөз болгон жыйын\n"
+"  -G, --basic-regexp        ШАБЛОН негизги түрдөгү регулярдуу выражение\n"
+"  -P, --perl-regexp         ШАБЛОН Perl түрүндөгү регулярдуу выражение\n"
+
+# выражение!!!!
+#: src/grep.c:1981
+#, fuzzy, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=ШАБЛОН       ШАБЛОНду регулярдуу выражение катары колдон\n"
+"  -f, --file=ФАЙЛ           ШАБЛОН ФАЙЛдан алынат\n"
+"  -i, --ignore-case         тамгалардын чоң-кичинеси айырмаланбайт\n"
+"  -w, --word-regexp         ШАБЛОН толук сөздөр менен гана уйкаштырылат\n"
+"  -x, --line-regexp         ШАБЛОН толук сап менен гана уйкаштырылат\n"
+"  -z, --null-data           дата(данный) саптары 0 байты(EOL эмес) менен "
+"бүтөт\n"
+
+#: src/grep.c:1989
+#, fuzzy, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Түрдүү:\n"
+"  -s, --no-messages         каталарды көрсөтпөйт\n"
+"  -v, --invert-match        уйкашы болбогон саптар тандалат\n"
+"  -V, --version             версия маалыматын көрсөтүп бүтүрөт\n"
+"      --help                бул жардам маалыматын көрсөтүп бүтүрөт\n"
+"      --mmap                мүмкүнчүлүк болсо mmap кирүүсү колдонулат\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"\n"
+"Контексти менен жыйынтык чыгаруу:\n"
+"  -B, --before-context=N    уйкаш болгон саптан мурунку N сап да көрсөтүлөт\n"
+"  -A, --after-context=N     уйкаш болгон саптан кийинки N сап да көрсөтүлөт\n"
+"  -C, --context=N           уйкаш болгон саптан мурунку жана кийинки N сап "
+"да көрсөтүлөт\n"
+"  -N                        --context=NUM менен бирдей\n"
+"      --color[=УЧУР],\n"
+"      --colour[=УЧУР]       уйкаш сөз кайсы учурда айырмаландырылат\n"
+"                            УЧУР - `always'(ардайым), `never'(эч качан) же "
+"`auto'(авто) боло алат.\n"
+"  -U, --binary              катар соңунда (EOL) CR тамгасы алынбайт (MSDOS)\n"
+"  -u, --unix-byte-offsets   орундарды CR жок болгондой кылып көрсөтөт "
+"(MSDOS)\n"
+"\n"
+
+#: src/grep.c:2052
+#, fuzzy, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"ФАЙЛ жазылбаса же ФАЙЛ - (тире) болсо, стандарт кирүү колдонулат. Экиден аз "
+"ФАЙЛ берилген болсо -h опциясы бар болот. Эгер сап тандалган болсо бүтүрүү "
+"статусу 0 болот, башка учурда 1; эгерде ката чыкса жана -q опциясы "
+"берилбеген болсо бүтүрүү статусу 2 болот.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "уйкаштыруучуларда конфликттер табылды"
+
+#: src/grep.c:2101
+#, fuzzy
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"Бул --disable-perl-regexp опциясы менен жасалган, -P опциясы кошулуу эмес"
+
+#: src/grep.c:2103
+#, fuzzy, c-format
+msgid "invalid matcher %s"
+msgstr "максимум сан жарабайт"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "аспап методу белгисиз"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "максимум сан жарабайт"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "белгисиз файл түрү"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr ""
+
+#: src/pcresearch.c:143
+#, fuzzy
+msgid "the -P option only supports a single pattern"
+msgstr "-P опциясы бир гана шаблон ала алат"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr ""
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr ""
+
+# Памятты эмне дейбиз яя? ;)
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "память жетпей калды"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr ""
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr ""
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr ""
+
+#, fuzzy, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "эскертүү: %s: %s\n"
+
+#, fuzzy
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: `--%s' опциясы менен аргумент колдонулбайт\n"
+
+#, fuzzy
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: бул опция түшүнүксүз `--%s'\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: `-W %s' опциясы так эмес\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: `-W %s' опциясы менен аргумент колдонулбайт\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: `%s' опциясы менен аргумент болуш керек\n"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr ""
+#~ "ШАБЛОН, алдынала тандалгандай, негизги түрдөгү регулярдуу выражение "
+#~ "(BRE)\n"
+
+#, fuzzy
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "`egrep' деген `grep -E'.  `fgrep' деген `grep -F'.\n"
+#~ "`egrep' же `fgrep'  деп туз иштетуу колдонулбай калды.\n"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "кайталоо саны толук эмес жазылды"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "кайталоо саны туура эмес жазылды"
+
+#~ msgid "writing output"
+#~ msgstr "жооп жазыбатат"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "ШАБЛОН кеңейтилген түрдөгү регулярдуу выражение (ERE).\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr "ШАБЛОН ар сапта бир сөз болгон жыйын.\n"
+
+# line - сап деп колдоном
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE;\n"
+#~ "                            TYPE is `binary', `text', or `without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories;\n"
+#~ "                            ACTION is `read', `recurse', or `skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+#~ "                            ACTION is `read' or `skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=FILE_PATTERN  search only files that match FILE_PATTERN\n"
+#~ "      --exclude=FILE_PATTERN  skip files and directories matching "
+#~ "FILE_PATTERN\n"
+#~ "      --exclude-from=FILE   skip files matching any file pattern from "
+#~ "FILE\n"
+#~ "      --exclude-dir=PATTERN directories that match PATTERN will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match print only names of FILEs containing no "
+#~ "match\n"
+#~ "  -l, --files-with-matches  print only names of FILEs containing matches\n"
+#~ "  -c, --count               print only a count of matching lines per "
+#~ "FILE\n"
+#~ "  -T, --initial-tab         make tabs line up (if needed)\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Жыйынтык берүү опциялары:\n"
+#~ "  -m, --max-count=N         N жолу уйкаш табылгандан кийин токтойт\n"
+#~ "  -b, --byte-offset         жыйынтыкта байт жайгашуусу көрсөтүлөт\n"
+#~ "  -n, --line-number         жыйынтыкта саптын катар номери көрсөтүлөт\n"
+#~ "      --line-buffered       табылган ар саптан улам жыйынтык көрсөтүлөт\n"
+#~ "  -H, --with-filename       ар уйкаш үчүн файлдын аты көрсөтүлөт\n"
+#~ "  -h, --no-filename         жыйынтыкта файлдын аты көрсөтүлбөйт\n"
+#~ "      --label=ТАМГА         стандарт кирүүдөн келгендерди ТАМГА файлынан "
+#~ "деп көрсөтөт\n"
+#~ "  -o, --only-matching       сапта ШАБЛОН менен уйкаш болгон жер эле "
+#~ "көрсөтүлөт\n"
+#~ "  -q, --quiet, --silent     жазылатурган баардык жыйынтык көрсөтүлбөйт\n"
+#~ "      --binary-files=ТҮР   бинариктердин түрүн ТҮР катары алат\n"
+#~ "                            ТҮР - 'binary', 'text', же 'without-match' "
+#~ "боло алат\n"
+#~ "  -a, --text                --binary-files=text менен бирдей\n"
+#~ "  -I                        --binary-files=without-match менен бирдей\n"
+#~ "  -d, --directories=ACTION  папкаларды кандай иштетерин билдирет\n"
+#~ "                            ACTION - 'read', 'recurse', же 'skip' боло "
+#~ "алат\n"
+#~ "  -D, --devices=ACTION      аспаптарды, FIFO жана сокеттерди кандай "
+#~ "иштетерин билдирет\n"
+#~ "                            ACTION - 'read' же 'skip' боло алат\n"
+#~ "  -R, -r, --recursive       --directories=recurse менен бирдей\n"
+#~ "      --include=ФАЙЛ_ШАБЛОНУ      ФАЙЛ_ШАБЛОНУ менен уйкашкан файлдар "
+#~ "гана каралат\n"
+#~ "      --exclude=ФАЙЛ_ШАБЛОНУ      ФАЙЛ_ШАБЛОНУ менен уйкашкан файл жана "
+#~ "папкалар каралбайт\n"
+#~ "      --exclude-from=ФАЙЛ   ФАЙЛдын ичиндеги шаблондор менен уйкашкан "
+#~ "файлдар каралбайт\n"
+#~ "      --exclude-dir=ШАБЛОН ШАБЛОН менен уйкашкан папкалар каралбайт\n"
+#~ "  -L, --files-without-match эч уйкаш табылбаган файлдардын аты гана "
+#~ "көрсөтүлөт\n"
+#~ "  -l, --files-with-matches  уйкаш табылган файлдардын аты гана жазылат\n"
+#~ "  -c, --count               ар файлда табылган уйкаш саны гана жазылат\n"
+#~ "  -T, --initial-tab         табтарды түздөйт (керек болсо)\n"
+#~ "  -Z, --null                файлдын атынан кийин 0 байты жазылат\n"
+
+#~ msgid "Invocation as `egrep' is deprecated; use `grep -E' instead.\n"
+#~ msgstr ""
+#~ "`egrep' деген колдонулбай калды; анын ордуна `grep -E' деп колдонунуз.\n"
+
+#~ msgid "Invocation as `fgrep' is deprecated; use `grep -F' instead.\n"
+#~ msgstr ""
+#~ "`fgrep' деген колдонулбай калды; анын ордуна `grep -F' деп колдонунуз.\n"
+
+# kandai koldpnulat bilbeim.
+#~ msgid ""
+#~ "In GREP_COLORS=\"%s\", the \"%s\" capacity needs a value (\"=...\"); "
+#~ "skipped."
+#~ msgstr ""
+#~ "GREP_COLORS=\"%s\" дегенде, \"%s\" көлөмүнө маани жазылыш керек (\"=..."
+#~ "\"); колдонулбайт."
+
+# kandai koldpnulat bilbeim.
+#~ msgid ""
+#~ "In GREP_COLORS=\"%s\", the \"%s\" capacity is boolean and cannot take a "
+#~ "value (\"=%s\"); skipped."
+#~ msgstr ""
+#~ "GREP_COLORS=\"%s\" дегенде, \"%s\" көлөмү булев түрүндө жана маани "
+#~ "алалбайт (\"=%s\"); колдонулбайт."
+
+# kandai koldpnulat bilbeim.
+#~ msgid "In GREP_COLORS=\"%s\", the \"%s\" capacity %s."
+#~ msgstr "GREP_COLORS=\"%s\" дегенде, \"%s\" көлөмү %s."
+
+#~ msgid ""
+#~ "Stopped processing of ill-formed GREP_COLORS=\"%s\" at remaining "
+#~ "substring \"%s\"."
+#~ msgstr ""
+#~ "Туура эмес жазылган GREP_COLORS=\"%s\", \"%s\" катарында ишке алынуусу "
+#~ "токтоду."
+
+#~ msgid "unknown directories method"
+#~ msgstr "папка методу белгисиз"
+
+# FSF котормосу ;)
+#~ msgid ""
+#~ "Copyright (C) 1988, 1992-2002, 2004, 2005  Free Software Foundation, "
+#~ "Inc.\n"
+#~ msgstr ""
+#~ "Укуктары сакталган (C) 1988, 1992-2002, 2004, 2005 Эркин Программа Фонду "
+#~ "(FSF)\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions.  There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "Бул эркин колдонулуучу программа; копиясын алуу үчүн коддордо жазылган\n"
+#~ "шарттарды караңыз. Бул программанын эч убадасы ЖОК; керек болсо СООДА же\n"
+#~ "БИР МАКСАТКА ЫҢГАЙЛУУ болуусуна да убада жок.\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "-P жана -z опциялары чогуу колдонулбайт"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: мындай опция колдонулбайт -- %c\n"
diff --git a/src/grep/po/lt.gmo b/src/grep/po/lt.gmo
new file mode 100644
index 0000000..8e1d215
--- /dev/null
+++ b/src/grep/po/lt.gmo
diff --git a/src/grep/po/lt.po b/src/grep/po/lt.po
new file mode 100644
index 0000000..deb35ef
--- /dev/null
+++ b/src/grep/po/lt.po
@@ -0,0 +1,867 @@
+# translation of grep-2.5.4-pre3 to Lithuanian
+# Copyright (C) 2008 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+#
+# Gintautas Miliauskas <gintas@akl.lt>, 2008.
+msgid ""
+msgstr ""
+"Project-Id-Version: grep-2.5.4-pre3\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2008-07-09 13:28+0300\n"
+"Last-Translator: Gintautas Miliauskas <gintas@akl.lt>\n"
+"Language-Team: Lithuanian <komp_lt@konferencijos.lt>\n"
+"Language: lt\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"X-Generator: KBabel 1.11.4\n"
+"Plural-Forms:  nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && (n"
+"%100<10 || n%100>=20) ? 1 : 2);\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr ""
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr ""
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr ""
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr ""
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr ""
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr ""
+
+#: lib/dfa.c:896
+#, fuzzy
+msgid "unbalanced ["
+msgstr "Nesubalansuotas ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr ""
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr ""
+
+#: lib/dfa.c:1210
+#, fuzzy
+msgid "unfinished \\ escape"
+msgstr "Nebaigta \\ kaitos seka"
+
+#: lib/dfa.c:1371
+#, fuzzy
+msgid "invalid content of \\{\\}"
+msgstr "netaisyklingas maksimalus skaičius"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr ""
+
+#: lib/dfa.c:1858
+#, fuzzy
+msgid "unbalanced ("
+msgstr "Nesubalansuotas ("
+
+#: lib/dfa.c:1975
+#, fuzzy
+msgid "no syntax specified"
+msgstr "Nenurodyta sintaksė"
+
+#: lib/dfa.c:1986
+#, fuzzy
+msgid "unbalanced )"
+msgstr "Nesubalansuotas )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Nežinoma sistemos klaida"
+
+#: lib/getopt.c:278
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: parametras `%s' dviprasmis\n"
+
+#: lib/getopt.c:284
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: parametras `%s' dviprasmis\n"
+
+#: lib/getopt.c:319
+#, fuzzy, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: neatpažintas argumentas „%c%s“\n"
+
+#: lib/getopt.c:345
+#, fuzzy, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: argumentas „%c%s“ neleidžia parametro\n"
+
+#: lib/getopt.c:360
+#, fuzzy, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: parametrui „%s“ reikia argumento\n"
+
+#: lib/getopt.c:621
+#, fuzzy, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: netaisyklingas argumentas -- %c\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, fuzzy, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: parametrui reikia argumento -- %c\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "baigėsi atmintis"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr ""
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr ""
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr ""
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "„"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "“"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr ""
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr ""
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr ""
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr ""
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr ""
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr ""
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr ""
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr ""
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr ""
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr ""
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr ""
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr ""
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Baigėsi atmintis"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr ""
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr ""
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr ""
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ""
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr ""
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr ""
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr ""
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr ""
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, fuzzy, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Licencija GPLv3+: GNU GPL versija 3 arba vėlesnė <http://gnu.org/licenses/"
+"gpl.html>\n"
+"Ši programa laisva: galite ją keisti ir platinti.\n"
+"Nėra JOKIOS GARANTIJOS, kiek leidžia įstatymai.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, fuzzy, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"\n"
+"Apie klaidas praneškite adresu <%s>.\n"
+
+#: lib/version-etc.c:251
+#, fuzzy, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr ""
+"\n"
+"Apie klaidas praneškite adresu <%s>.\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr ""
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr ""
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(standartinis įvedimas)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "netaisyklingas konteksto ilgio argumentas"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "įvedimas per didelis skaičiavimui"
+
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "Dvejetainis failas %s atitinka\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "rekursyvus aplankų ciklas"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr ""
+
+#: src/grep.c:1961 src/grep.c:1968
+#, fuzzy, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Naudojimas: %s [ARGUMENTAS]... ŠABLONAS [FAILAS]...\n"
+
+#: src/grep.c:1963
+#, fuzzy, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Pabandykite „%s --help“, jei norite gauti daugiau informacijos.\n"
+
+#: src/grep.c:1969
+#, fuzzy, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Ieškoti ŠABLONO kiekviename faile arba standartiniame įėjime.\n"
+
+#: src/grep.c:1970
+#, fuzzy, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Pavyzdys: %s -i 'labas pasauli' menu.h main.c\n"
+"\n"
+"Reguliariųjų išraiškų parinkimas ir interpretacija:\n"
+
+#: src/grep.c:1975
+#, fuzzy, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     ŠABLONAS yra išplėstinė reguliarioji išr. (ERE)\n"
+"  -F, --fixed-strings       ŠABLONAS yra aibė fiksuotų sekų atskirose "
+"eilutėse\n"
+"  -G, --basic-regexp        ŠABLONAS yra įprasta reguliarioji išraiška "
+"(BRE)\n"
+"  -P, --perl-regexp         ŠABLONAS yra Perl reguliarioji išraiška\n"
+
+#: src/grep.c:1981
+#, fuzzy, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=ŠABLONAS     naudoti ŠABLONĄ paieškai\n"
+"  -f, --file=FAILAS         gauti ŠABLONĄ iš FAILO\n"
+"  -i, --ignore-case         ignoruoti raidžių registrą\n"
+"  -w, --word-regexp         ŠABLONAS turi atitikti tik pilnus žodžius\n"
+"  -x, --line-regexp         ŠABLONAS turi atitikti tik pilnas eilutes\n"
+"  -z, --null-data           duomenų eilutė baigiasi 0 baitu, o ne nauja "
+"eil.\n"
+
+#: src/grep.c:1989
+#, fuzzy, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Kita:\n"
+"  -s, --no-messages         nerodyti klaidų\n"
+"  -v, --invert-match        išrinkti neatitinkančias eilutes\n"
+"  -V, --version             spausdinti versijos informaciją ir išeiti\n"
+"      --help                parodyti šią informaciją ir išeiti\n"
+"      --mmap                naudoti mmap įvedimą, jei tai įmanoma\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"\n"
+"Konteksto valdymas:\n"
+"  -B, --before-context=NUM  spausdinti NUM eilučių prieš atitikimą\n"
+"  -A, --after-context=NUM   spausdinti NUM eilučių po atitikimo\n"
+"  -C, --context=NUM         spausdinti NUM eilučių konteksto\n"
+"  -NUM                      tas pats, kaip --context=NUM\n"
+"      --color[=KADA],\n"
+"      --colour[=KADA]       naudoti markerius atitikimams pažymėti;\n"
+"                            KADA yra „always“, „never“ arba „auto“\n"
+"  -U, --binary              nešalinti CR simbolių eilutės pabaigoje (MSDOS)\n"
+"  -u, --unix-byte-offsets   pranešti baitų pozicijas, tarsi nebūtų CRų "
+"(MSDOS)\n"
+"\n"
+
+#: src/grep.c:2052
+#, fuzzy, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Jei FAILAS nenurodytas arba yra -, skaityti standartinį įvedimą.  Jei\n"
+"pateikti mažiau negu du failai, naudoti -h.  Grąžinamas klaidos kodas\n"
+"0, jei rasta bent viena eilutė, 1 kitais atvejais;\n"
+"jei įvyksta klaida ir nenurodytas -q, klaidos kodas yra 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "nurodyti nesuderinami atitikimo mechanizmai"
+
+#: src/grep.c:2101
+#, fuzzy
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"Parametro -P palaikymas neįkompiliuotas į šią --disable-perl-regexp programą"
+
+#: src/grep.c:2103
+#, fuzzy, c-format
+msgid "invalid matcher %s"
+msgstr "netaisyklingas maksimalus skaičius"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "nežinomas įrenginių metodas"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "netaisyklingas maksimalus skaičius"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "nežinomas dvejetainių failų tipas"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr ""
+
+#: src/pcresearch.c:143
+#, fuzzy
+msgid "the -P option only supports a single pattern"
+msgstr "Parametras -P leidžia tik vieną šabloną"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr ""
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr ""
+
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "baigėsi atmintis"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr ""
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr ""
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr ""
+
+#, fuzzy, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "įspėjimas: %s: %s\n"
+
+#, fuzzy
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: argumentas „--%s“ neleidžia parametro\n"
+
+#, fuzzy
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: neatpažintas argumentas „--%s“\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: parametras „-W %s“ dviprasmis\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: parametras „-W %s“ nepriima argumento\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: parametrui „%s“ reikia argumento\n"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr ""
+#~ "ŠABLONAS numatytuoju atveju yra paprasta reguliarioji išraiška (BRE).\n"
+
+#, fuzzy
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "„egrep“ reiškia „grep -E“. „fgrep“ reiškia „grep -F“.\n"
+#~ "Tiesioginiai kvietimai vardais „egrep“ arba „fgrep“ nebenaudotini.\n"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "nebaigtas pakartojimų skaičius"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "netaisyklingas pakartojimų skaičius"
+
+#~ msgid "writing output"
+#~ msgstr "rašomas išvedimas"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "ŠABLONAS yra išplėstinė reguliarioji išraiška (ERE).\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr "ŠABLONAS yra aibė simbolių sekų atskirose eilutėse.\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE;\n"
+#~ "                            TYPE is `binary', `text', or `without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories;\n"
+#~ "                            ACTION is `read', `recurse', or `skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+#~ "                            ACTION is `read' or `skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=FILE_PATTERN  search only files that match FILE_PATTERN\n"
+#~ "      --exclude=FILE_PATTERN  skip files and directories matching "
+#~ "FILE_PATTERN\n"
+#~ "      --exclude-from=FILE   skip files matching any file pattern from "
+#~ "FILE\n"
+#~ "      --exclude-dir=PATTERN directories that match PATTERN will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match print only names of FILEs containing no "
+#~ "match\n"
+#~ "  -l, --files-with-matches  print only names of FILEs containing matches\n"
+#~ "  -c, --count               print only a count of matching lines per "
+#~ "FILE\n"
+#~ "  -T, --initial-tab         make tabs line up (if needed)\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Išvedimo valdymas:\n"
+#~ "  -m, --max-count=NUM       sustoti po NUM atitikimų\n"
+#~ "  -b, --byte-offset         išvesti baito numerį išvedant eilutes\n"
+#~ "  -n, --line-number         išvesti eilutės numerį išvedant eilutes\n"
+#~ "      --line-buffered       išleisti (flush) išvedimą po kiekvienos "
+#~ "eilutės\n"
+#~ "  -H, --with-filename       išspausdinti failo vardą kiekvienam "
+#~ "atitikimui\n"
+#~ "  -h, --no-filename         nespausdinti failo vardo\n"
+#~ "      --label=ŽYMĖ          spausdinti ŽYMĘ kaip failo vardą stand. "
+#~ "įvedimui\n"
+#~ "  -o, --only-matching       rodyti tik tą eilutės dalį, kuri atitinka "
+#~ "ŠABLONĄ\n"
+#~ "  -q, --quiet, --silent     išjunti normalų išvedimą\n"
+#~ "      --binary-files=TIPAS   tarti, kad dvejetainiai failai yra šio "
+#~ "TIPO;\n"
+#~ "                            TIPAS yra „binary“, „text“ arba „without-"
+#~ "match“\n"
+#~ "  -a, --text                tapatu --binary-files=text\n"
+#~ "  -I                        tapatu --binary-files=without-match\n"
+#~ "  -d, --directories=VEIKSMAS kaip ieškoti aplankuose;\n"
+#~ "                            VEIKSMAS yra „read“, „recurse“ arba „skip“\n"
+#~ "  -D, --devices=VEIKSMAS    kaip ieškoti įrenginiuose, FIFO ir lizduose;\n"
+#~ "                            VEIKSMAS yra „read“ arba „skip“\n"
+#~ "  -R, -r, --recursive       tapatu --directories=recurse\n"
+#~ "      --include=FAILŲ_ŠABLONAS ieškoti failuose, kurių vardai atitinka "
+#~ "šabl.\n"
+#~ "      --exclude=FAILŲ_ŠABLONAS praleisti failus, kurių vardai atitinka "
+#~ "šabl.\n"
+#~ "      --exclude-from=FAILAS praleisti failus, kurių v. atitinka šabl. iš "
+#~ "FAILO\n"
+#~ "      --exclude-dir=ŠABLONAS aplankai, atitinkantys ŠABLONĄ, bus "
+#~ "praleisti.\n"
+#~ "  -L, --files-without-match spausdinti tik neatitinkančių failų vardus\n"
+#~ "  -l, --files-with-matches  spausdinti tik atitinkančių šabloną failų "
+#~ "vardus\n"
+#~ "  -c, --count               spausdinti tik atitinkančių eilučių faile "
+#~ "skaičių\n"
+#~ "  -T, --initial-tab         lygiuoti tabuliatorius (jei reikia)\n"
+#~ "  -Z, --null                spausdinti 0 baitą po FAILO vardo\n"
+
+#~ msgid "Invocation as `egrep' is deprecated; use `grep -E' instead.\n"
+#~ msgstr "Kvietimas pavadinimu „egrep“ nebenaudotinas, naudokite „grep -E“.\n"
+
+#~ msgid "Invocation as `fgrep' is deprecated; use `grep -F' instead.\n"
+#~ msgstr "Kvietimas pavadinimu „fgrep“ nebenaudotinas, naudokite „grep -F“.\n"
+
+#~ msgid ""
+#~ "In GREP_COLORS=\"%s\", the \"%s\" capacity needs a value (\"=...\"); "
+#~ "skipped."
+#~ msgstr ""
+#~ "Kintamajame GREP_COLORS=„%s“, „%s“ reikia reikšmės („=...“); praleista."
+
+#~ msgid ""
+#~ "In GREP_COLORS=\"%s\", the \"%s\" capacity is boolean and cannot take a "
+#~ "value (\"=%s\"); skipped."
+#~ msgstr ""
+#~ "Kintamajame GREP_COLORS=„%s“, „%s“ dvejetainis, todėl reikšmė („=%s“) "
+#~ "netinkama; praleista."
+
+#~ msgid "In GREP_COLORS=\"%s\", the \"%s\" capacity %s."
+#~ msgstr "Kintamajame GREP_COLORS=„%s“, „%s“ talpumas %s."
+
+#~ msgid ""
+#~ "Stopped processing of ill-formed GREP_COLORS=\"%s\" at remaining "
+#~ "substring \"%s\"."
+#~ msgstr ""
+#~ "Sustabdytas netaisyklingo GREP_COLORS=„%s“ apdorojimas ties likusiu "
+#~ "posekiu „%s“."
+
+#~ msgid "unknown directories method"
+#~ msgstr "nežinomas aplankų metodas"
+
+#~ msgid "Copyright (C) 2008 Free Software Foundation, Inc.\n"
+#~ msgstr "Autorinės teisės (C) 2008 Free Software Foundation, Inc.\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "Parametrai -P ir -z negali būti sujungti"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: neleistinas argumentas -- %c\n"
diff --git a/src/grep/po/nb.gmo b/src/grep/po/nb.gmo
new file mode 100644
index 0000000..2981ce0
--- /dev/null
+++ b/src/grep/po/nb.gmo
diff --git a/src/grep/po/nb.po b/src/grep/po/nb.po
new file mode 100644
index 0000000..d8ebd0f
--- /dev/null
+++ b/src/grep/po/nb.po
@@ -0,0 +1,925 @@
+# Norwegian bokmål translation of GNU Grep
+# Copyright (C) 1996 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Johnny A. Solbu <johnny@solbu.net>, 2020-2021
+# Åka Sikrom <a4@hush.com>, 2014-2020
+# Eivind Tagseth <eivindt@multinet.no>, 1997, 2004
+# Karl Anders Øygard <karl.oygard@fou.telenor.no>, 1996.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep-3.6.27\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-08-09 14:11+0200\n"
+"Last-Translator: Johnny A. Solbu <johnny@solbu.net>\n"
+"Language-Team: Norwegian Bokmaal <l10n-no@lister.huftis.org>\n"
+"Language: nb\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"X-Generator: Poedit 2.2.3\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "«%s» er et ugyldig argument for %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "«%s» er et tvetydig argument for %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Følgende argumenter er gyldige:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "programfeil"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "stabel er full"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "skrivefeil"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "ubalansert ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "ugyldig tegnklasse"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "gjeldende tegnklasse-syntaks er [[:space:]], ikke [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "ufullstendig \\-skiftetegn"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "ugyldig innhold i \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "regulært uttrykk er for stort"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "ubalansert ("
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "ingen syntaks er valgt"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "ubalansert «)»"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Ukjent systemfeil"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: valget «%s%s» er flertydig\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: valget «%s%s» er flertydig, og kan bety følgende:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: valget «%s%s» er ukjent\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: valget «%s%s» tillater ikke argumenter\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: valget «%s%s» krever et argument\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: valget -- «%c» er ugyldig\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: valget -- «%c» krever et argument\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "minnet er oppbrukt"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "klarte ikke å hente gjeldende arbeidsmappe"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "klarte ikke å gå tilbake til opprinnelig arbeidsmappe"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "klarte ikke å endre fildeskriptor for tekst-/binærmodus"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "«"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "»"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Fullført"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Ingen treff"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Ugyldig regulært uttrykk"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Ugyldig sorteringstegn"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Ugyldig tegnklassenavn"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Avsluttende omvendt skråstrek"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Ugyldig tilbakereferanse"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Ingen treff på «[», «[^», «[:», «[.» eller «[=»"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "Ingen treff på ( eller \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "Ingen treff på \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Ugyldig innhold i «\\{\\}»"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Ugyldig slutt på rekkevidde"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Minnet er oppbrukt"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Ugyldig foregående regulært uttrykk"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "For tidlig slutt på regulært uttrykk"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Regulært uttrykk er for stort"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "Ingen treff på «)» eller «\\)»"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Intet tidligere regulært uttrykk"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Pakket av %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Pakket av %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "(C)"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Lisens GPLv3+: GNU GPL versjon 3 eller nyere <%s>.\n"
+"Dette er fri programvare. Du kan endre og dele den videre så mye du vil.\n"
+"Utgiveren stiller INGEN GARANTI, i den grad gjeldende lovverk tillater det.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Skrevet av %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Skrevet av %s og %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Skrevet av %s, %s og %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Skrevet av %s, %s, %s\n"
+"og %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Skrevet av %s, %s, %s,\n"
+"%s og %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Skrevet av %s, %s, %s,\n"
+"%s, %s og %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Skrevet av %s, %s, %s,\n"
+"%s, %s, %s og %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Skrevet av %s, %s, %s,\n"
+"%s, %s, %s, %s\n"
+"og %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Skrevet av %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s og %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Skrevet av %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s og andre.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "Rapporter feil til: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Rapporter feil som oppstår med %s til: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Nettside for %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Generell hjelp til bruk av GNU-programvare: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(standard inndata)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "ugyldig kontekstlengde"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "for mye inndata å telle"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: Binærfil samsvarer"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: advarsel: rekursiv mappeløkke"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: inndatafil er også brukt som utdata"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Bruk: %s [VALG] … MØNSTER [FIL] …\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Prøv å skrive «%s --help» for mer informasjon.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Søk etter MØNSTER i valgt(e) FIL(er).\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Eksempel: %s -i 'hei verden' menu.h main.c\n"
+"MØNSTER kan inneholde flere mønstre adskilt med linjeskift.\n"
+"\n"
+"Reg.uttrykksutvalg og tolkning:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     MØNSTER er et utvidet regulært uttrykk\n"
+"  -F, --fixed-strings       MØNSTER er flere linje-adskilte strenger\n"
+"  -G, --basic-regexp        MØNSTER er et enkelt regulært uttrykk\n"
+"  -P, --perl-regexp         MØNSTER er et Perl-uttrykk\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=MØNSTER      søk etter MØNSTER\n"
+"  -f, --file=FIL            hent MØNSTER fra valgt FIL\n"
+"  -i, --ignore-case         ikke skill mellom store og små bokstaver\n"
+"      --no-ignore-case      skill mellom store og små bokstaver (forvalgt)\n"
+"  -w, --word-regexp         søk etter hele ord\n"
+"  -x, --line-regexp         søk etter hele linjer\n"
+"  -z, --null-data           linjer slutter på 0-byte i stedet for "
+"linjeskift\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Diverse:\n"
+"  -s, --no-messages         ikke skriv ut feilmeldinger\n"
+"  -v, --revert-match        velg linjer som ikke passer\n"
+"  -V, --version             vis versjon og avslutt\n"
+"      --help                vis denne helpeteksten og avslutt\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Utdata-kontroll:\n"
+"  -m, --max-count=ANT       stopp ved valgt ANTall treff\n"
+"  -b, --byte-offset         skriv ut hvor søkeuttrykket ga treff per "
+"utdatalinje\n"
+"  -n, --line-number         skriv ut linjenummmer per utdatalinje\n"
+"      --line-buffered       tøm utdata på hver linje\n"
+"  -H, --with-filename       ta med filnavn på søketreff-linjer\n"
+"  -h, --no-filename         ikke ta med filnavn-prefiks i utdata\n"
+"      --label=ETIKETT         bruk valgt ETIKETT som prefiks på standard "
+"inndata-filnavn\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       bare vis den delen av linja som ga treff\n"
+"  -q, --quiet, --silent     ikke skriv ut noe vanlig utdata\n"
+"      --binary-files=TYPE   forvent at binærfiler er av valgt TYPE.\n"
+"                            TYPE er «binary» (binær), «text» (tekst) eller "
+"«without-match» (uten treff)\n"
+"  -a, --text                tilsvarer «--binary-files=text»\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        tilsvarer «--binary-files=without-match»\n"
+"  -d, --directories=HANDLING  hvordan mapper skal håndteres.\n"
+"                            HANDLING er «read» (les), «recurse» (søk i "
+"undermapper og -filer) eller «skip» (hopp over)\n"
+"  -D, --devices=HANDLING      hvordan enheter, FIFO-er og sokler skal "
+"behandles.\n"
+"                            HANDLING er «read» (les) eller «skip» (hopp "
+"over)\n"
+"  -r, --recursive           tilsvarer «--directories=recurse»\n"
+"  -R, --dereference-recursive  likner «-r», men følger symbolske lenker\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=MØNSTER  bare søk gjennom filer som samsvarer med MØNSTER\n"
+"      --exclude=MØNSTER  hopp over filer som samsvarer med MØNSTER\n"
+"      --exclude-from=FIL   hopp over filer som samsvarer med mønstre nevnt i "
+"FIL\n"
+"      --exclude-dir=MØNSTER  hopp over mapper som samsvarer med MØNSTER.\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match  bare skriv ut FILnavn som ikke inneholder "
+"søketreff\n"
+"  -l, --files-with-matches  bare skriv ut FILnavn som inneholder søketreff\n"
+"  -c, --count               bare skriv ut antall samsvarende linjer per FIL\n"
+"  -T, --initial-tab         still opp tabulatorer (hvis nødvendig)\n"
+"  -Z, --null                skriv ut 0-byte etter FILnavn\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Kontekstkontroll:\n"
+"  -B, --before-context=ANT  skriv ut valgt ANTall linjer med ledende "
+"kontekst\n"
+"  -A, --after-context=ANT   skriv ut valgt ANTall linjer med avsluttende "
+"kontekst\n"
+"  -C, --context=ANT         skriv ut valgt ANTall linjer med utdata-"
+"kontekst\n"
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NUM                      tilsvarer «--context=NUM»\n"
+"      --group-separator=SEP Skriv ut SEP på linje mellom treff med kontekst\n"
+"      --no-group-separator ikke skriv ut skilletegn for treff med kontekst\n"
+"      --color[=NÅR],\n"
+"      --colour[=NÅR]       bruk markører for å fremheve strenger som "
+"samsvarer\n"
+"                            NÅR er enten «always» (alltid) , "
+"«never» (aldri), eller «auto»\n"
+"  -U, --binary              ikke fjern CR-tegn ved EOL (MSDOS/Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Programmet leser standard inndata når FIL er «-».  Når FIL ikke er valgt, "
+"leses «.» i\n"
+"rekursiv modus, og ellers «-». Valget «-h» gjelder implisitt hvis færre enn "
+"to FILer er valgt.\n"
+"Avsluttende statuskode er 0 når søket gir treff, og ellers 1.\n"
+"Hvis det oppstår feil og «-q» ikke er valgt, avslutter programmet med "
+"statuskode 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "søkeuttrykkene er i konflikt med hverandre"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr "Søk støttes ikke i Perl når det er bygd med «--disable-perl-regexp»"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "«%s» er et ugyldig søkeuttrykk"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "ukjent enhetsmetode"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr "advarsel: --unix-byte-offsets (-u) er avleggs"
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "ugyldig maksantall"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "ukjent binærfiltype"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Skrevet av Mike Haertel og andre. Se\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "klarte ikke å tildele minne til PCRE JIT-stabelen"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P støtter bare regioner i unibyte- og UTF-8"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "valget «-P» støtter bare ett mønster"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "intern feil (dette skal aldri skje)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "grensa for PCRE-linjelengde er overskredet"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: minnet er oppbrukt"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: PCRE JIT-stabel er oppbrukt"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: grensa for PCRE-tilbakegang er overskredet"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: PCREs rekursjonsgrense er overskredet"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: intern PCRE-feil: %d"
+
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr "advarsel: GREP_OPTIONS er utdatert. Bruk et alias eller skript"
+
+#~ msgid "warning: %s: %s"
+#~ msgstr "advarsel: %s. %s"
+
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "Nettside for %s: <http://www.gnu.org/software/%s/>\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "%s%s-argumentet «%s» er ugyldig"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "ugyldig suffiks i %s%s-argument «%s»"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "%s%s-argumentet «%s» er for stort/langt"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "internal error"
+#~ msgstr "intern feil"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: valget «--%s» tillater ikke argumenter\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: valget «--%s» er ukjent\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: valget «-W %s» er flertydig\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: valget «-W %s» tillater ikke argumenter\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: valget «-W %s» krever et argument\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "lseek mislyktes"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "MØNSTER er et enkelt regulært uttrykk (BRE) som standard. \n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "«egrep» betyr «grep -E».  «fgrep» betyr «grep -F».\n"
+#~ "Direkte kjøring som «egrep» eller «fgrep» er foreldet.\n"
+
+#~ msgid "unescaped ^ or $ not supported with -Pz"
+#~ msgstr "ingen treff på «^», eller «$» støttes ikke med «-Pz»"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "Nettside for GNU Grep: <%s>\n"
+
+#~ msgid "invalid UTF-8 byte sequence in input"
+#~ msgstr "inndata inneholder en ugyldig UTF-8-bytesekvens"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "uferdig gjentagelsesantall"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "feilaktig gjentagelsesantall"
+
+#~ msgid "out of memory"
+#~ msgstr "tomt for minne"
+
+#~ msgid "writing output"
+#~ msgstr "skriver utdata"
+
+#~ msgid "Usage: %s [OPTION]... PATTERN [FILE] ...\n"
+#~ msgstr "Bruk: %s [FLAGG]... MØNSTER [FIL] ...\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE\n"
+#~ "                            TYPE is 'binary', 'text', or 'without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories\n"
+#~ "                            ACTION is 'read', 'recurse', or 'skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets\n"
+#~ "                            ACTION is 'read' or 'skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=PATTERN     files that match PATTERN will be examined\n"
+#~ "      --exclude=PATTERN     files that match PATTERN will be skipped.\n"
+#~ "      --exclude-from=FILE   files that match PATTERN in FILE will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match only print FILE names containing no match\n"
+#~ "  -l, --files-with-matches  only print FILE names containing matches\n"
+#~ "  -c, --count               only print a count of matching lines per "
+#~ "FILE\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Utskriftskontroll:\n"
+#~ "  -m, --max-count=ANT       stopp etter ANT samsvar\n"
+#~ "  -b, --byte-offset         skriv byte-forskyvning sammen med "
+#~ "utskriftslinjer\n"
+#~ "  -n, --line-number         skriv linjenummer sammen med utskriftslinjer\n"
+#~ "      --line-buffered       tøm utskriftsbuffer for hver linje\n"
+#~ "  -H, --with-filename       skriv filnavnet for hvert samsvar\n"
+#~ "  -h, --no-filename         ikke skriv filnavnet for hvert samsvar\n"
+#~ "      --label=NAVN          skriv NAVN som filnavn for standard innkanal\n"
+#~ "  -o, --only-matching       vis bare den delen av en linje som samsvarer "
+#~ "med\n"
+#~ "                            MØNSTER.\n"
+#~ "  -q, --quiet, --silent     undertrykk all vanlig utskrift\n"
+#~ "      --binary-files=TYPE   anta at binære filer er TYPE\n"
+#~ "                            TYPE er «binary», «text» eller «without-"
+#~ "match»\n"
+#~ "  -a, --text                samme som binary-files=text\n"
+#~ "  -I                        samme som --binary-files=without-match\n"
+#~ "  -d, --directories=HANDLING hvordan håndtere kataloger\n"
+#~ "                            HANDLING er «read» eller «skip»\n"
+#~ "  -D, --devices=HANDLING    hvordan enheter, FIFOer og sockets skal "
+#~ "håndteres\n"
+#~ "                            HANDLING er «read» eller «skip»\n"
+#~ "  -R, -r, --recursive       samme som --directories=recurse\n"
+#~ "      --include=MØNSTER     undersøk filer som samsvarer med MØNSTER.\n"
+#~ "      --exclude=MØNSTER     hopp over filer som samsvarer med MØNSTER.\n"
+#~ "      --exclude-from=FIL    hopp over filer som samsvarer med MØNSTER i "
+#~ "FIL.\n"
+#~ "  -L, --files-without-match bare skriv FIL-navn uten samsvar\n"
+#~ "  -l, --files-with-matches  bare skriv FIL-navnene som inneholder "
+#~ "samsvar\n"
+#~ "  -c, --count               bare skriv ut antall samsvarende linjer per "
+#~ "FIL\n"
+#~ "  -Z, --null                skriv 0-byte etter FIL-navn\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Report bugs to <bug-gnu-utils@gnu.org>.\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Rapportér feil til <bug-gnu-utils@prep.ai.mit.edu>.\n"
+
+#~ msgid "unknown directories method"
+#~ msgstr "ukjent katalogmetode"
+
+#~ msgid "%s (GNU grep) %s\n"
+#~ msgstr "%s (GNU grep) %s\n"
+
+#~ msgid ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+#~ msgstr ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions. There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "Dette er fri programvare, se kildekoden for kopieringsbetingelser.  Det\n"
+#~ "er INGEN garanti, ikke en gang for SALGBARHET eller EGNETHET FOR NOEN \n"
+#~ "SPESIELL OPPGAVE.\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "-P-flagget og -z-flagget kan ikke bli brukt sammen"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: ulovlig flagg -- %c\n"
diff --git a/src/grep/po/nl.gmo b/src/grep/po/nl.gmo
new file mode 100644
index 0000000..6116ec0
--- /dev/null
+++ b/src/grep/po/nl.gmo
diff --git a/src/grep/po/nl.po b/src/grep/po/nl.po
new file mode 100644
index 0000000..9f83a7a
--- /dev/null
+++ b/src/grep/po/nl.po
@@ -0,0 +1,900 @@
+# Dutch translations for GNU grep.
+# Copyright (C) 2021 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+#
+# "Keep your religious feelings to yourself."
+#
+# Benno Schulenberg <benno@vertaalt.nl>, 2005, 2007, 2008, 2010, 2011, 2012, 2013.
+# Benno Schulenberg <benno@vertaalt.nl>, 2014, 2015, 2016, 2018, 2019, 2020, 2021.
+# Erwin Poeze <erwin.poeze@gmail.com>, 2009.
+# Taco Witte <tcwitte@cs.uu.nl>, 2004.
+# Ivo Timmermans <itimmermans@bigfoot.com>, 2000.
+# Erick Branderhorst <branderh@debian.org>, 1996.
+msgid ""
+msgstr ""
+"Project-Id-Version: grep-3.6.27\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-08-11 11:40+0200\n"
+"Last-Translator: Benno Schulenberg <vertaling@coevern.nl>\n"
+"Language-Team: Dutch <vertaling@vrijschrift.org>\n"
+"Language: nl\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"Plural-Forms: nplurals=2; plural=n != 1;\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "ongeldig argument %s van %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "argument %s van %s is niet eenduidig"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Geldige argumenten zijn:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "programmafout"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "stack-overloop"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "schrijffout"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "ongepaarde ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "ongeldige tekenklasse"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "syntax van tekenklasse is [[:space:]], niet [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "onafgemaakte \\-stuurcode"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "ongeldige inhoud van \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "reguliere expressie is te groot"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "ongepaarde ("
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "geen syntax opgegeven"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "ongepaarde )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Onbekende systeemfout"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: optie '%s%s' is niet eenduidig\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: optie '%s%s' is niet eenduidig; mogelijkheden zijn:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: onbekende optie '%s%s'\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: optie '%s%s' staat geen argument toe\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: optie '%s%s' vereist een argument\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: ongeldige optie -- '%c'\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: optie vereist een argument -- '%c'\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "onvoldoende geheugen beschikbaar"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "kan de huidige werkmap niet vastleggen"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "kan niet terugkeren naar de oorspronkelijke werkmap"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "kan modus van bestandsdescriptor niet instellen op tekst of binair"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "‘"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "’"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Gelukt"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Geen overeenkomsten"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Ongeldige reguliere expressie"
+
+# Zie http://mailman.vrijschrift.org/pipermail/vertaling/2005-August/004670.html
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Ongeldig samengesteld teken"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Ongeldige tekenklassenaam"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Backslash aan het eind"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Ongeldige terugverwijzing"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Ongepaarde [, [^, [:, [., of [="
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "Ongepaarde ( of \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "Ongepaarde \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Ongeldige inhoud van \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Ongeldig bereikeinde"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Onvoldoende geheugen beschikbaar"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Ongeldige voorafgaande reguliere expressie"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Voortijdig einde van reguliere expressie"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Reguliere expressie is te groot"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "Ongepaarde ) of \\)"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Geen eerdere reguliere expressie"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "In pakketvorm gebracht door %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "In pakketvorm gebracht door %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Dit is vrije software: u mag het vrijelijk wijzigen en verder verspreiden.\n"
+"De precieze licentie is GPL-3+: GNU General Public License versie 3 of "
+"later.\n"
+"Zie <%s> voor de volledige (Engelse) tekst.\n"
+"Deze software kent GEEN GARANTIE, voor zover de wet dit toestaat.\n"
+"\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Geschreven door %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Geschreven door %s en %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Geschreven door %s, %s en %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Geschreven door %s, %s, %s\n"
+"en %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Geschreven door %s, %s, %s,\n"
+"%s en %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Geschreven door %s, %s, %s,\n"
+"%s, %s en %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Geschreven door %s, %s, %s,\n"
+"%s, %s, %s en %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Geschreven door %s, %s, %s,\n"
+"%s, %s, %s, %s\n"
+"en %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Geschreven door %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s en %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Geschreven door %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s en anderen.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"Rapporteer gebreken in het programma aan %s;\n"
+"meld fouten in de vertaling aan <vertaling@vrijschrift.org>.\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr ""
+"Rapporteer gebreken in het programma '%s' aan <%s>;\n"
+"meld fouten in de vertaling aan <vertaling@vrijschrift.org>.\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Webpagina van %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Algemene hulp bij gebruik van GNU-software: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(standaardinvoer)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "ongeldig argument voor contextlengte"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "invoer is te groot om te kunnen tellen"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: binair bestand bevat de gezochte tekst"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: waarschuwing: recursieve lus in de mappen"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: invoerbestand is gelijk aan het uitvoerbestand"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Gebruik:  %s [OPTIE...] PATRONEN [BESTAND...]\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Typ '%s --help' voor meer informatie.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr ""
+"  \n"
+"Zoekt naar PATRONEN in ieder gegeven BESTAND.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"  \n"
+"    Voorbeeld:  %s -i 'hallo wereld' menu.h main.c\n"
+"\n"
+"PATRONEN kan uit meerdere patronen op aparte regels bestaan.\n"
+"\n"
+"Keuze en interpretatie van PATRONEN:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     PATRONEN zijn uitgebreide reguliere expressies\n"
+"  -F, --fixed-strings       PATRONEN zijn tekenreeksen\n"
+"  -G, --basic-regexp        PATRONEN zijn gewone reguliere expressies\n"
+"  -P, --perl-regexp         PATRONEN zijn reguliere Perl-expressies\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=PATRONEN     deze PATRONEN gebruiken bij het zoeken\n"
+"  -f, --file=BESTAND        patronen uit dit BESTAND halen\n"
+"  -i, --ignore-case         verschil tussen hoofd- en kleine letters "
+"negeren\n"
+"                              in de patronen en in de gegevens\n"
+"      --no-ignore-case      hoofd- van kleine letters onderscheiden "
+"(standaard)\n"
+"  -w, --word-regexp         patronen komen alleen overeen met een heel "
+"woord\n"
+"  -x, --line-regexp         patronen komen alleen overeen met een hele "
+"regel\n"
+"  -z, --null-data           regels eindigen op 0-byte, niet op LF-teken\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Diversen:\n"
+"  -s, --no-messages         foutmeldingen onderdrukken\n"
+"  -v, --invert-match        de niet-overeenkomende regels selecteren\n"
+"  -V, --version             programmaversie tonen en stoppen\n"
+"      --help                deze hulptekst tonen en stoppen\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Uitvoeropties:\n"
+"  -m, --max-count=AANTAL    na dit AANTAL overeenkomsten stoppen\n"
+"  -b, --byte-offset         bij de uitvoerregels het byte-adres tonen\n"
+"  -n, --line-number         bij de uitvoerregels het regelnummer tonen\n"
+"      --line-buffered       elke uitvoerregel direct tonen\n"
+"  -H, --with-filename       bij de uitvoerregels de bestandsnaam tonen\n"
+"  -h, --no-filename         nooit de bestandsnaam tonen\n"
+"      --label=LABEL         dit LABEL als naam voor standaardinvoer "
+"gebruiken\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       alleen overeenkomende niet-lege fragmenten "
+"tonen\n"
+"  -q, --quiet, --silent     alle normale uitvoer onderdrukken\n"
+"      --binary-files=TYPE   aannemen dat binaire bestanden van dit TYPE "
+"zijn;\n"
+"                              TYPE is 'binary' (binair), 'text' (als "
+"tekst),\n"
+"                              of 'without-match' (alsof geen "
+"overeenkomsten)\n"
+"  -a, --text                hetzelfde als '--binary-files=text'\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        hetzelfde als '--binary-files=without-match'\n"
+"  -d, --directories=ACTIE   mappen behandelen met deze ACTIE;\n"
+"                              ACTIE is 'read', 'recurse' of 'skip'\n"
+"                              (ofwel lezen, in-afdalen, of overslaan)\n"
+"  -D, --devices=ACTIE       apparaten, FIFO's en sockets behandelen met "
+"ACTIE;\n"
+"                              ACTIE is 'read' of 'skip' (lezen of "
+"overslaan)\n"
+"  -r, --recursive           afdalen in submappen (ofwel '--"
+"directories=recurse')\n"
+"  -R, --dereference-recursive   idem, maar alle symbolische koppelingen "
+"volgen\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=BESTANDSPATROON  alleen bestanden doorzoeken die aan\n"
+"                                   BESTANDSPATROON voldoen\n"
+"      --exclude=BESTANDSPATROON  bestanden overslaan die aan "
+"BESTANDSPATROON\n"
+"                                   voldoen\n"
+"      --exclude-from=BESTAND     bestanden overslaan die aan een\n"
+"                                   bestandspatroon in BESTAND voldoen\n"
+"      --exclude-dir=BSTNDSPTRN   mappen overslaan die aan BSTNDSPTRN "
+"voldoen\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match alleen namen van bestanden zonder overeenkomst "
+"tonen\n"
+"  -l, --files-with-matches  alleen namen van bestanden met overeenkomsten "
+"tonen\n"
+"  -c, --count               alleen het aantal overeenkomsten per bestand "
+"tonen\n"
+"  -T, --initial-tab         tabs uitlijnen (eventueel een tab-teken "
+"invoegen)\n"
+"  -Z, --null                een 0-byte invoegen na iedere bestandsnaam\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Contextbesturing:\n"
+"  -B, --before-context=AANTAL   dit AANTAL regels voorafgaande context "
+"tonen\n"
+"  -A, --after-context=AANTAL    dit AANTAL regels nakomende context tonen\n"
+"  -C, --context=AANTAL          dit AANTAL regels context tonen\n"
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -AANTAL                       hetzelfde als '--context=AANTAL'\n"
+"      --group-separator=TEKENS  contexten scheiden met regel met deze "
+"tekens\n"
+"      --no-group-separator      geen scheiding weergeven tussen contexten\n"
+"      --color[=WANNEER],\n"
+"      --colour[=WANNEER]    overeenkomende tekst gekleurd weergeven;\n"
+"                              WANNEER is 'always' (altijd), "
+"'never' (nooit),\n"
+"                              of 'auto' (gepast voor uitvoerdoel; "
+"standaard)\n"
+"  -U, --binary              geen CR-tekens weghalen bij regeleinde (MSDOS/"
+"Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Indien BESTAND '-' is, wordt standaardinvoer gelezen.  Zonder een BESTAND\n"
+"wordt '.' gelezen indien in recursieve modus, anders wordt '-' gelezen.\n"
+"Bij minder dan twee BESTANDen wordt '-h' aangenomen.\n"
+"\n"
+"De afsluitwaarde is 0 in geval van overeenkomsten, anders 1; als er\n"
+"een fout optreedt en '-q' is niet gegeven, dan is de afsluitwaarde 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "conflicterende expressiesoorten"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr "Perl-expressies worden door deze programmaversie niet ondersteund"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "ongeldige expressiesoort '%s'"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "onbekende apparaten-actie"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr "waarschuwing: --unix-byte-offsets (-u) is verouderd"
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "ongeldig maximum aantal"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "onbekend binair bestandstype"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Geschreven door Mike Haertel en anderen; zie\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "onvoldoende geheugen beschikbaar voor de PCRE-JIT-stack"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "optie '-P' ondersteunt alleen enkelbytes- en UTF-8-taalregio's"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "optie '-P' accepteert slechts één patroon"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "**interne programmafout** (zou nooit mogen gebeuren)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "de regellengtegrens van PCRE is overschreden"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: onvoldoende geheugen beschikbaar"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: de PCRE-JIT-stack is volledig gebruikt"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: de terugverwijzingengrens van PCRE is overschreden"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: de recursiegrens van PCRE is overschreden"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: **interne programmafout** in PCRE: %d"
+
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr ""
+#~ "waarschuwing: GREP_OPTIONS is verouderd; gebruik een alias of een script"
+
+#~ msgid "warning: %s: %s"
+#~ msgstr "waarschuwing: %s: %s"
+
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "Webpagina van '%s': <https://www.gnu.org/software/%s/>\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "ongeldig argument '%3$s' van %1$s%2$s"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "ongeldig achtervoegsel in argument '%3$s' van %1$s%2$s"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "argument '%3$s' van %1$s%2$s is te groot"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "internal error"
+#~ msgstr "**interne programmafout**"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: optie '--%s' staat geen argument toe\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: onbekende optie '--%s'\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: optie '-W %s' is niet eenduidig\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: optie '-W %s' staat geen argument toe\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: optie '-W %s' vereist een argument\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "'lseek' is mislukt"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "PATROON is standaard een gewone reguliere expressie (BRE).\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "Het gebruik van 'egrep' en 'fgrep' wordt ontraden;\n"
+#~ "'egrep' betekent 'grep -E'; 'fgrep' betekent 'grep -F'.\n"
+#~ "\n"
+
+#~ msgid "unescaped ^ or $ not supported with -Pz"
+#~ msgstr "een naakte ^ of $ wordt niet ondersteund met optie '-Pz'"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "Webpagina van GNU grep: <%s>\n"
+
+#~ msgid "invalid UTF-8 byte sequence in input"
+#~ msgstr "ongeldige UTF-8-bytereeks in invoer"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "PATROON is een uitgebreide reguliere expressie (ERE).\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr ""
+#~ "Gebruik van 'egrep' wordt ontraden; het is beter 'grep -E' te gebruiken.\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr "PATROON is een serie tekenreeksen, elk op een aparte regel.\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr ""
+#~ "Gebruik van 'fgrep' wordt ontraden; het is beter 'grep -F' te gebruiken.\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s kan alleen de patroonsyntax %s gebruiken"
+
+#~ msgid "the --mmap option has been a no-op since 2010"
+#~ msgstr "de optie '--mmap' doet niets meer sinds 2010"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "onafgemaakt herhalingsaantal"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "onjuist herhalingsaantal"
+
+#~ msgid "writing output"
+#~ msgstr "schrijven van uitvoer..."
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity needs a value (\"=...\"); "
+#~ "skipped"
+#~ msgstr ""
+#~ "GREP_COLORS='%s' --\n"
+#~ "  Kenmerk '%s' vereist een waarde ('=...'); genegeerd."
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity is boolean and cannot take a "
+#~ "value (\"=%s\"); skipped"
+#~ msgstr ""
+#~ "GREP_COLORS='%s' --\n"
+#~ "  Kenmerk '%s' is booleaans en verwacht geen waarde ('=%s'); genegeerd."
+
+#~ msgid "in GREP_COLORS=\"%s\", the \"%s\" capacity %s"
+#~ msgstr ""
+#~ "GREP_COLORS='%s' --\n"
+#~ "  Kenmerk '%s': %s."
+
+#~ msgid ""
+#~ "stopped processing of ill-formed GREP_COLORS=\"%s\" at remaining "
+#~ "substring \"%s\""
+#~ msgstr ""
+#~ "GREP_COLORS='%s' --\n"
+#~ "  Tekenreeks is onjuist; verwerking is gestopt voor subreeks '%s'."
+
+#~ msgid "unknown directories method"
+#~ msgstr "onbekende mappen-actie"
diff --git a/src/grep/po/pa.gmo b/src/grep/po/pa.gmo
new file mode 100644
index 0000000..e89550b
--- /dev/null
+++ b/src/grep/po/pa.gmo
diff --git a/src/grep/po/pa.po b/src/grep/po/pa.po
new file mode 100644
index 0000000..646f11f
--- /dev/null
+++ b/src/grep/po/pa.po
@@ -0,0 +1,708 @@
+# Punjabi Translation for grep
+# Copyright (C) 2012 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+#
+# A S Alam <aalam@users.sf.net>, 2012.
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 2.11.11-pre1\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2012-05-19 17:52+0530\n"
+"Last-Translator: A S Alam <aalam@users.sf.net>\n"
+"Language-Team: Punjabi <punjabi-l10n@lists.sourceforge.net>\n"
+"Language: pa\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"Plural-Forms: nplurals=2; plural=n != 1;\n"
+"X-Generator: Lokalize 1.4\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "%2$s ਲਈ ਗਲਤ ਆਰਗੂਮੈਂਟ %1$s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr ""
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "ਠੀਕ ਆਰਗੂਮੈਂਟ ਹਨ:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr ""
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr ""
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "ਲਿਖਣ ਗਲਤੀ"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "ਅਧੂਰੀ ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "ਗਲਤ ਕਰੈਕਟਰ ਕਲਾਸ"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr ""
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr ""
+
+#: lib/dfa.c:1371
+#, fuzzy
+msgid "invalid content of \\{\\}"
+msgstr "ਗਲਤ ਵੱਧ ਤੋਂ ਵੱਧ ਗਿਣਤੀ"
+
+#: lib/dfa.c:1374
+#, fuzzy
+msgid "regular expression too big"
+msgstr "ਨਿਯਮਤ ਸਮੀਕਰਨ ਬਹੁਤ ਵੱਡੀ ਹੈ"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "ਅਧੂਰੀ ("
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "ਕੋਈ ਸੰਟੈਕਸ ਨਹੀਂ ਦਿੱਤਾ"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "ਅਧੂਰੀ )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "ਅਣਜਾਣ ਸਿਸਟਮ ਗਲਤੀ"
+
+#: lib/getopt.c:278
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: ਚੋਣ '-W %s' ਸਧਾਰਨ ਹੈ।\n"
+
+#: lib/getopt.c:284
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: ਚੋਣ '-W %s' ਸਧਾਰਨ ਹੈ।\n"
+
+#: lib/getopt.c:319
+#, fuzzy, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: ਬੇ-ਪਛਾਣ ਚੋਣ '%c%s'\n"
+
+#: lib/getopt.c:345
+#, fuzzy, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: ਚੋਣ '%c%s' ਇੱਕ ਆਰਗੂਮੈਂਟ ਨਹੀਂ ਲੈਂਦੀ\n"
+
+#: lib/getopt.c:360
+#, fuzzy, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: ਚੋਣ '--%s' ਲਈ ਇੱਕ ਆਰਗੂਮੈਂਟ ਚਾਹੀਦਾ\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: ਗਲਤ ਚੋਣ -- '%c'\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: ਚੋਣ ਲਈ ਆਰਗੂਮੈਂਟ ਚਾਹੀਦਾ ਹੈ --'%c'\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "ਮੈਮੋਰੀ ਖਤਮ ਹੋਈ"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "ਮੌਜੂਦਾ ਕਾਰਜਕਾਰੀ ਡਾਇਰੈਕਟਰੀ ਰਿਕਾਰਡ ਕਰਨ ਲਈ ਅਸਮਰੱਥ"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "ਸ਼ੁਰੂਆਤੀ ਕਾਰਜਕਾਰੀ ਡਾਇਰੈਕਟਰੀ ਦੇਣ ਲਈ ਫੇਲ੍ਹ"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr ""
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "`"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "'"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "ਸਫ਼ਲ"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "ਕੋਈ ਮੇਲ ਨਹੀਂ"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "ਗਲਤ ਰੈਗੂਲਰ ਸਮੀਕਰਨ"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr ""
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "ਗਲਤ ਕਰੈਕਟਰ ਕਲਾਸ ਨਾਂ"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr ""
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr ""
+
+#: lib/regcomp.c:156
+#, fuzzy
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "ਨਾ ਮਿਲਦੇ [ ਜਾਂ [^"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "ਨਾ ਮਿਲਦੇ ( ਜਾਂ \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "ਨਾ-ਮਿਲਦੇ \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr ""
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "ਗਲਤ ਅੰਤ ਰੇਜ਼"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "ਮੈਮੋਰੀ ਖਤਮ ਹੋਈ"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr ""
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr ""
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "ਨਿਯਮਤ ਸਮੀਕਰਨ ਬਹੁਤ ਵੱਡੀ ਹੈ"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "ਨਾ ਮਿਲਦੇ ) ਜਾਂ \\)"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "ਕੋਈ ਪਿਛਲਾ ਨਿਯਮਤ ਸਮੀਕਰਨ ਨਹੀਂ"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "%s (%s) ਵਲੋਂ ਪੈਕ ਕੀਤਾ\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "%s ਵਲੋਂ ਪੈਕੇਜ ਬਣਾਇਆ\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "(C)"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "%s ਨੇ ਲਿਖਿਆ।\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "%s ਅਤੇ %s ਨੇ ਲਿਖਿਆ\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "%s, %s, ਅਤੇ %s ਨੇ ਲਿਖਿਆ।\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"%s, %s, %s,\n"
+"ਅਤੇ %s ਨੇ ਲਿਖਿਆ\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"%s, %s, %s, %s,\n"
+"ਅਤੇ %s ਨੇ ਲਿਖਿਆ।\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"%s, %s, %s, %s, %s\n"
+"ਅਤੇ %s ਨੇ ਲਿਖਿਆ।\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"%s, %s, %s, %s, %s,\n"
+"%s ਅਤੇ %s ਨੇ ਲਿਖਿਆ।\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"%s. %s, %s, %s,\n"
+"%s, %s, %s ਅਤੇ %s\n"
+"ਨੇ ਲਿਖਿਆ।\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"%s. %s, %s, %s,\n"
+"%s, %s, %s, %s\n"
+"ਅਤੇ %s ਨੇ ਲਿਖਿਆ।\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"%s, %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, ਅਤੇ ਹੋਰਾਂ ਨੇ ਲਿਖਿਆ।\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, fuzzy, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"\n"
+"ਬੱਗ ਰਿਪੋਰਟ ਦਿਉ: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "%s ਬੱਗ ਬਾਰੇ ਰਿਪੋਰਟ ਦਿਓ: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "%s ਮੁੱਖ ਪੇਜ਼: <%s>\n"
+
+#: lib/version-etc.c:260
+#, fuzzy, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "ਗਨੂ ਸਾਫਟਵੇਅਰ ਦੀ ਵਰਤੋਂ ਲਈ ਆਮ ਮੱਦਦ ਵਾਸਤੇ: <http://www.gnu.org/gethelp/>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(ਸਟੈਂਡਰਡ ਆਉਟਪੁੱਟ)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr ""
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "ਇੰਪੁੱਟ ਗਿਣਤੀ ਕਰਨ ਲਈ ਬਹੁਤ ਵੱਡੀ ਹੈ"
+
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "ਬਾਈਨਰੀ ਫਾਇਲ %s ਮਿਲਦੀ ਹੈ\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "ਲਗਾਤਾਰ ਡਾਇਰੈਕਟਰੀ ਲੂਪ"
+
+#: src/grep.c:1899
+#, fuzzy, c-format
+msgid "%s: input file is also the output"
+msgstr "ਇੰਪੁੱਟ ਫਾਇਲ %s ਆਉਟਪੁੱਟ ਫਾਇਲ ਵੀ ਹੈ"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, fuzzy, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "ਵਰਤੋਂ: %s [ਚੋਣਾਂ]... ਪੈਟਰਨ [ਫਾਇਲ]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "ਹੋਰ ਜਾਣਕਾਰੀ ਲਈ '%s --help' ਨਾਲ ਕੋਸ਼ਿਸ਼ ਕਰੋ।\n"
+
+#: src/grep.c:1969
+#, fuzzy, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "ਹਰੇਕ ਫਾਇਲ (FILE) ਜਾਂ ਸਟੈਂਡਰਡ ਆਉਟਪੁੱਟ ਲਈ ਪੈਟਰਨ ਦੀ ਖੋਜ।\n"
+
+#: src/grep.c:1970
+#, fuzzy, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"ਉਦਾਹਰਨ: %s -i 'hello world' menu.h main.c\n"
+"\n"
+"ਨਿਯਮਤ-ਸਮੀਕਰਨ (Regexp) ਚੋਣ ਅਤੇ ਚਲਾਉਣਾ:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr ""
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "ਗਲਤ ਮੈਚਰ %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "ਅਣਜਾਣ ਜੰਤਰ ਢੰਗ"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "ਗਲਤ ਵੱਧ ਤੋਂ ਵੱਧ ਗਿਣਤੀ"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "ਅਣਜਾਣ ਬਾਈਨਰੀ-ਫਾਇਲ ਕਿਸਮ"
+
+#: src/grep.c:2829
+#, fuzzy
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr "ਹੋਰਾਂ ਲਈ <http://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS> ਵੇਖੋ"
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr ""
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr ""
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr ""
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr ""
+
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "ਮੈਮੋਰੀ ਖਤਮ ਹੋਈ"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr ""
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr ""
+
+#: src/pcresearch.c:327
+#, fuzzy, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "ਅੰਦਰੂਨੀ ਗਲਤੀ"
+
+#, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "ਸਾਵਧਾਨ: %s: %s"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "ਗਲਤ %s%s ਆਰਗੂਮੈਂਟ '%s'"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "%s%s ਆਰਗੂਮੈਂਟ '%s' ਬਹੁਤ ਵੱਡਾ ਹੈ"
+
+#, fuzzy
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "%s ਮੁੱਖ ਪੇਜ਼: <http://www.gnu.org/software/%s/>\n"
+
+#~ msgid "internal error"
+#~ msgstr "ਅੰਦਰੂਨੀ ਗਲਤੀ"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "ਮਾਈਕ ਹਾਇਰਟੇਲ"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: ਚੋਣ '--%s' ਇੱਕ ਆਰਗੂਮੈਂਟ ਨਹੀਂ ਲੈਂਦੀ\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: ਬੇ-ਪਛਾਣ ਚੋਣ '--%s'\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: ਚੋਣ '-W %s' ਸਧਾਰਨ ਹੈ।\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: ਚੋਣ '-W %s' ਲਈ ਕੋਈ ਆਰਗੂਮੈਂਟ ਨਹੀਂ ਚਾਹੀਦਾ\n"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "ਪੈਟਰਨ (PATTERN) ਮੂਲ ਰੂਪ ਵਿੱਚ ਇੱਕ ਨਿਯਮਤ ਸਕਰੀਨ (BRE) ਹੁੰਦਾ ਹੈ।\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "lseek ਫੇਲ੍ਹ ਹੈ"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "ਪੈਟਰਨ ਇੱਕ ਵਾਧੂ ਨਿਯਮਤ ਸਮੀਕਰਨ ਹੈ (ERE) ਹੈ।\n"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "ਗਨੂ Grep ਮੁੱਖ ਪੇਜ਼: <%s>\n"
diff --git a/src/grep/po/pl.gmo b/src/grep/po/pl.gmo
new file mode 100644
index 0000000..514a0c7
--- /dev/null
+++ b/src/grep/po/pl.gmo
diff --git a/src/grep/po/pl.po b/src/grep/po/pl.po
new file mode 100644
index 0000000..3f509c3
--- /dev/null
+++ b/src/grep/po/pl.po
@@ -0,0 +1,756 @@
+# Polish translation of the GNU grep messages
+# Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2005, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Rafał Maszkowski <rzm@icm.edu.pl>, 1996-2002, 2005, 2007-2017, 2019-2021.
+msgid ""
+msgstr ""
+"Project-Id-Version: GNU grep 3.6.27\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-08-09 11:35+0200\n"
+"Last-Translator: Rafał Maszkowski <rzm@icm.edu.pl>\n"
+"Language-Team: Polish <translation-team-pl@lists.sourceforge.net>\n"
+"Language: pl\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8-bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "błędny argument %s dla %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "dwuznaczny argument %s dla %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Prawidłowe agrumenty to:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "błąd programu"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "przepełnienie stosu"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "błąd zapisu"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "[ nie do pary"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "błędna nazwa klasy znaków"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "składnia klasy znaków to [[:space:]], nie [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "niedokończona sekwencja \\"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "błędna zawartość \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "za duże wyrażenie regularne"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "( nie do pary"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "brak specyfikacji składni"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr ") nie do pary"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Nieznany błąd systemowy"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: opcja „%s%s” jest niejednoznaczna\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: opcja „%s%s” jest niejednoznaczna; możliwości:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: nierozpoznana opcja „%s%s”\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: opcja „%s%s” nie może mieć argumentu\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: opcja „%s%s” wymaga argumentu\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: błędna opcja -- „%c”\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: opcja wymaga argumentu -- „%c”\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "pamięć wyczerpana"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "nie udało się zapisać bieżącego katalogu"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "nie udało się powrócić do początkowego katalogu"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "nie udało się ustawić trybu tekstowego/binarnego deskryptora pliku"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "„"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "”"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Udane"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Nie pasuje"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Błędne wyrażenie regularne"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Znak błędny dla bieżącego uporządkowania"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Błędna nazwa klasy znaków"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Końcowy ukośnik odwrotny"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Błędne odwołanie"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Nie pasujący [, [^, [:, [., albo [="
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "Nie pasujący ( albo \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "Nie pasujący \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Błędna zawartość \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Błędny koniec zakresu"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Pamięć wyczerpana"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Błędne poprzedzające wyrażenie regularne"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Przedwczesny koniec wyrażenia regularnego"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Za duże wyrażenie regularne"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "Nie pasujący ) albo \\)"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Brak poprzedniego wyrażenia regularnego"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Spakowane przez %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Spakowane przez %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Licencja GPLv3+: GNU GPL wersja 3 albo późniejsza %s\n"
+"To jest wolne oprogramowanie: możesz je modyfikować i rozpowszechniać.\n"
+"Autorzy NIE DAJĄ GWARANCJI w granicach dozwolonych prawem.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Napisany przez %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Napisany przez %s i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Napisany przez %s, %s i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Napisany przez %s, %s, %s\n"
+"i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Napisany przez %s, %s, %s,\n"
+"%s i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Napisany przez %s, %s, %s,\n"
+"%s, %s i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Napisany przez %s, %s, %s,\n"
+"%s, %s, %s i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Napisany przez %s, %s, %s,\n"
+"%s, %s, %s, %s\n"
+"i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Napisany przez %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s i %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Napisany przez %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s i innych.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "Raporty o błędach należy wysyłać do %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Raporty o błędach %s należy wysyłać do %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Strona domowa %s: %s\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Pomoc w używaniu oprogramowania GNU: %s\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(standardowe wejście)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "błędny argument długości kontekstowej"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "danych wejściowych jest zbyt dużo do policzenia"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: plik binarny pasuje do wzorca"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: nieskończona pętla przeglądania katalogów"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: plik wejściowy jest również plikiem wyjściowym"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Składnia: %s [OPCJA]... WZORCE [PLIK] ...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Napisz „%s --help” żeby dowiedzieć się więcej.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Szukanie WZORCÓW w PLIKACH.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Przykład: %s -i 'hello world' menu.h main.c\n"
+"WZORCE mogą zawierać wiele wzorców w kolejnych liniach.\n"
+"\n"
+"Wybór i interpretacja wzorców:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     WZORCE są rozszerzonymi wyrażeniami regularnymi\n"
+"  -F, --fixed-strings       WZORCE są napisami\n"
+"  -G, --basic-regexp        WZORCE są podstawowymi wyrażeniami regularnymi\n"
+"  -P, --perl-regexp         WZORCE są wyrażeniami regularnymi perla\n"
+
+# synonimy: wielkie/małe litery, majuskuła/minuskuła, górna/dolna kaszta, górny/dolny rejestr liter; ogólnie: kaszta, rejestr
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=WZORCE       dopasowanie do WZORCOW\n"
+"  -f, --file=PLIK           użycie wzorców z PLIKU\n"
+"  -i, --ignore-case         ignorowanie rejestru liter\n"
+"      --no-ignore-case      bez ignorowania rejestru liter (domyślnie)\n"
+"  -w, --word-regexp         dopasowanie WZORCOW tylko do pełnych słów\n"
+"  -x, --line-regexp         dopasowanie WZORCOW tylko do całych linii\n"
+"  -z, --null-data           linie są zakończone bajtem 0, nie znakiem\n"
+"                            nowej linii\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Różne:\n"
+"  -s, --no-messages         bez komunikatów o błędach\n"
+"  -v, --invert-match        wybranie nie pasujących linii\n"
+"  -V, --version             wypisanie informacji o wersji i zakończenie\n"
+"      --help                wypisanie tych informacji i zakończenie\n"
+"\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Sterowanie danymi wyjściowymi:\n"
+"  -m, --max-count=ILE       zatrzymanie po ILU wybranych liniach\n"
+"  -b, --byte-offset         wypisanie pozycji bajtów w wyniku\n"
+"  -n, --line-number         wypisanie numerów linii w wyniku\n"
+"      --line-buffered       opróżnienie bufora po każdej linii\n"
+"  -H, --with-filename       wypisanie nazwy pliku dla każdej linii\n"
+"  -h, --no-filename         bez nazwy pliku w liniach wyjściowych\n"
+"      --label=ETYKIETA      w wyniku ETYKIETA zastępuje nazwe pliku\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       pokazanie tylko niepustych części linii, które\n"
+"                              pasują\n"
+"  -q, --quiet, --silent     wyłączenie wypisywanie wyniku\n"
+"      --binary-files=TYP    założenie, że pliki binarne są typu TYP\n"
+"                            TYP to „binary”, „text” lub „without-match”.\n"
+"  -a, --text                równoważne --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        równoważne --binary-files=without-match\n"
+"  -d, --directories=DZIAŁANIE  jak się obchodzić z katalogami,\n"
+"                            DZIAŁANIE to „read” (czytanie), „recurse”\n"
+"                            (przeglądanie rekurencujne) albo „skip”\n"
+"                            (pominięcie).\n"
+"  -D, --devices=DZIAŁANIE   jak odwoływać się do urządzeń, FIFO i gniazd,\n"
+"                            DZIAŁANIE to „read” (czytaj) albo "
+"„skip” (pomiń)\n"
+"  -r, --recursive           równoważne --directories=recurse\n"
+"  -R, --dereference-recursive  podobnie, ale z podążaniem za dowiązaniami\n"
+"                              symbolicznymi\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=WZORZEC_PLIKOWY  przeszukiwane będą pliki pasujące do\n"
+"                              WZORCA_PLIKOWEGO\n"
+"      --exclude=WZORZEC_PLIKOWY  pliki pasujące do WZORCA_PLIKOWEGO będą\n"
+"                              pominięte\n"
+"      --exclude-from=PLIK   pominięcie plików pasujących do wzorców "
+"plikowych\n"
+"                              w PLIKU\n"
+"      --exclude-dir=WZORZEC_PLIKOWY  katalogi pasujące do WZORCA_PLIKOWEGO\n"
+"                              będą pominięte\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match  wypisanie tylko nazw PLIKÓW bez wybranych "
+"linii\n"
+"  -l, --files-with-matches  wypisanie tylko nazw PLIKÓW z wybranymi liniami\n"
+"  -c, --count               wypisanie tylko liczby wybranych linii w każdym\n"
+"                              PLIKU\n"
+"  -T, --initial-tab         wyrównanie linii przez TAB (jeżeli potrzebne)\n"
+"  -Z, --null                wypisanie bajtu 0 po każdej nazwie PLIKU\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Sterowanie kontekstem:\n"
+"  -B, --before-context=ILE  wypisanie ILU linii kontekstu przed\n"
+"  -A, --after-context=ILE   wypisanie ILU linii kontekstu po\n"
+"  -C, --context=ILE         wypisanie ILU linii kontekstu\n"
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -ILE                      to samo co --context=ILE\n"
+"      --group-separator=SEP  wypisanie SEP między dopasowaniami z "
+"kontekstem\n"
+"      --no-group-separator  bez wypisania separatora między dopasowaniami z\n"
+"                              z kontekstem\n"
+"      --color[=KIEDY],\n"
+"      --colour[=KIEDY]      oznaczanie pasujących znaków,\n"
+"                            KIEDY to „always” (zawsze), „never” (nigdy)\n"
+"                            albo „auto” (automatycznie).\n"
+"  -U, --binary              bez usuwania znaków nowej linii na końcu\n"
+"                              (MSDOS/Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Jeżeli PLIK to „-”, czytane jest standardowe wejście. Jeżeli PLIK nie jest\n"
+"podany i użyta jest opcja -r, czytany jest katalog ., natomiast - gdy -r "
+"nie\n"
+"jest podane. Jeżeli podano mniej niż dwa PLIKI, program włącza opcję -h.\n"
+"Zakończenie działania z kodem wyjściowym 0, jeżeli pasuje jakaś linia\n"
+"z 1, jeżeli nie; z 2, w razie błędów i gdy nie podano opcji -q.\n"
+
+#  viendo los fuentes , hay varias opciones
+#  que hay sin documentar. O quiza es que getopt() lo he entendido mal
+#  Son las opciones X ( requiere argumento ) , switchs  -c, -b, -L e -y
+#  grep.c:622 ->
+#  opt = getopt(argc, argv, "0123456789A:B:CEFGVX:bce:f:hiLlnqsvwxy"
+#  grep --help ->
+#  usage: grep [-[[AB] ]<num>] [-[CEFGVchilnqsvwx]] [-[ef]] <expr> [<files...>]
+#  La opción -X es a la que corresponde esta línea.
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "podano sprzeczne wzorce"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"Dopasowywanie wzorców w stylu perla nie działa w wersji zbudowanej z --"
+"disable-perl-regexp"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "błędna dopasowanie %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "nieznany sposób przeglądania urządzeń"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr "uwaga: opcja --unix-byte-offsets (-u( jest przestarzała"
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "błędna maksymalna liczba powtórzeń"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "nieznany typ pliku binarnego"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Program napisany przez Mike'a Haertela i innych, zobacz\n"
+"https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS"
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "nie udało się zaalokować pamięci dla stosu PCRE JIT"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P działa tylko kodowaniem jednobajtowym albo UTF-8"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "opcja -P może być użyta tylko do pojedynczego wzorca"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "błąd wewnętrzny (nigdy nie powinien się zdarzyć)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "przekroczony limit długości linii PCRE"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: pamięć wyczerpana"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: wyczerpany stos JIT PCRE"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: przekroczony limit analizy wstecznej PCRE"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: przekroczony limit rekursji PCRE"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: błąd wewnętrzny PCRE: %d"
diff --git a/src/grep/po/pt.gmo b/src/grep/po/pt.gmo
new file mode 100644
index 0000000..70f3c1c
--- /dev/null
+++ b/src/grep/po/pt.gmo
diff --git a/src/grep/po/pt.po b/src/grep/po/pt.po
new file mode 100644
index 0000000..3d1ddcd
--- /dev/null
+++ b/src/grep/po/pt.po
@@ -0,0 +1,953 @@
+# Portuguese (Portugal) translation for the grep package.
+# Copyright (C) 2018 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Pedro Albuquerque <pmra@protonmail.com>, 2018, 2019, 2020, 2021.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 3.6.27\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-08-09 10:42+0100\n"
+"Last-Translator: Pedro Albuquerque <pmra@protonmail.com>\n"
+"Language-Team: Portuguese <translation-team-pt@lists.sourceforge.net>\n"
+"Language: pt\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"X-Generator: Poedit 2.3\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "argumento inválido %s para %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "argumento ambíguo %s para %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Os argumentos válidos são:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "erro de programa"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "transporte da pilha"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "erro de escrita"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "[ sem par"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "classe de carácter inválida"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "a sintaxe da classe de carácter é [[:espaço:]], não [:espaço:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "não terminado\\escape"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "conteúdo inválido de \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "expressão regular muito grande"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "( sem par"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "sintaxe não especificada"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr ") sem par"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Erro de sistema desconhecido"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: a opção \"%s%s\" é ambígua\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: a opção \"%s%s\" é ambígua; possibilidades:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: opção \"%s%s\" desconhecida\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: a opção \"%s%s\" não permite um argumento\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "\"%s: a opção \"%s%s\" requer um argumento\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: opção inválida -- \"%c\"\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: a opção requer um argumento -- \"%c\"\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "memória esgotada"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "impossível gravar a pasta de trabalho actual"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "falha ao voltar à pasta de trabalho inicial"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "falha ao definir modo texto/binário do descritor de ficheiro"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "\""
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "\""
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Sucesso"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Sem par"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Expressão regular inválida"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Carácter de agrupamento inválido"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Nome de classe de carácter inválido"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Barra invertida final"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Referência de retorno inválida"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "[, [^, [:, [., ou [= sem par"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "( ou \\( sem par"
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "\\{ sem par"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Conteúdo inválido de \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Final de intervalo inválido"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Memória esgotada"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Expressão regular precedente inválida"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Fim prematuro de expressão regular"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Expressão regular muito grande"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ") ou \\) sem par"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Sem expressão regular prévia"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Empacotado por %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Empacotado por %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "(©)"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Licença GPLv3+: GNU GPL versão 3 ou posterior <%s>\n"
+"Este é um programa grátis: pode alterá-lo e redistribuí-lo.\n"
+"Não há QUALQUER GARANTIA, até ao limite da Lei.\n"
+"\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Escrito por %s\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Escrito por %s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Escrito por %s, %s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s\n"
+"e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, %s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, %s, %s\n"
+"e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s e outros.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "Reportar erros a: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Reportar %s erros a: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Página inicial %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Ajuda geral para uso de programas GNU: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(entrada padrão)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "argumento de tamanho de contexto inválido"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "entrada muito grande para contar"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: ficheiro binário coincide"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: aviso: ciclo de pasta recursivo"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: ficheiro de entrada também é a saída"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Uso: %s [OPÇÃO]... PADRÕES [FICHEIRO]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Tente \"%s --help\" para mais informação.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Procurar por PADRÕES em cada FICHEIRO\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Exemplo: %s -i 'hello world' menu.h main.c\n"
+"PADRÕES pode conter múltiplos padrões separados por newline.\n"
+"\n"
+"Selecção e interpretação de padrão:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     PADRÕES são expressões regulares estendidas\n"
+"  -F, --fixed-strings       PADRÕES são cadeias\n"
+"  -G, --basic-regexp        PADRÕES são expressões regulares básicas\n"
+"  -P, --perl-regexp         PADRÕES são expressões regulares Perl\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=PADRÕES      usar PADRÕES para comparação\n"
+"  -f, --file=FICHEIRO       ler PADRÕES do FICHEIRO\n"
+"  -i, --ignore-case         ignorar diferenças entre maiúsculas e "
+"minúsculas\n"
+"      --no-ignore-case      não ignorar diferenças de maiúsculas "
+"(predefinição)\n"
+"  -w, --word-regexp         comparar só palavras completas\n"
+"  -x, --line-regexp         comparar só linhas completas\n"
+"  -z, --null-data           uma linha de dados termina com o byte 0, não com "
+"newline\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Diversos:\\n\"\n"
+"  -s, --no-messages         suprime mensagens de erro\n"
+"  -v, --invert-match        selecciona linhas que não contenham PADRÃO\n"
+"  -V, --version             mostra informação de versão e sai\n"
+"      --help                mostra esta mensagem e sai\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Controlo de saída:\n"
+"  -m, --max-count=NUM       pára após NUM linhas seleccionadas\n"
+"  -b, --byte-offset         imprime o desvio de byte com as linhas de saída\n"
+"  -n, --line-number         imprime o nº de linha com as linhas de saída\n"
+"      --line-buffered       limpa a saída em cada linha\n"
+"  -H, --with-filename       imprime o nome de ficheiro com as linhas de "
+"saída\n"
+"  -h, --no-filename         suprime o prefixo do nome de ficheiro na saída\n"
+"      --label=RÓTULO        usa RÓTULO como prefixo de nome de ficheiro de "
+"entrada padrão\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       mostra só partes não-vazias de linhas que "
+"coincidem\n"
+"  -q, --quiet, --silent     suprime toda a saída normal\n"
+"      --binary-files=TYPE   assume que ficheiros binários são TIPO;\n"
+"                            TIPO é \"binary\", \"text\" ou \"without-match"
+"\"\n"
+"  -a, --text                equivalente a --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        equivalente a --binary-files=without-match\n"
+"  -d, --directories=ACÇÃO   COMO GERIR PASTAS;\n"
+"                            ACÇÃO é 'read', 'recurse' ou 'skip'\n"
+"  -D, --devices=ACÇÃO       COMO GERIR DISPOSITIVOS, FIFOs e sockets;\n"
+"                            ACÇÃO é 'read' ou 'skip'\n"
+"  -r, --recursive           como --directories=recurse\n"
+"  -R, --dereference-recursive  igual, mas segue todas as symlinks\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=GLOB        procura só em ficheiros que contêm GLOB (um "
+"padrão de ficheiro)\n"
+"      --exclude=GLOB        salta ficheiros e pastas que contêm GLOB\n"
+"      --exclude-from=FICH   salta ficheiros que contêm qualquer padrão de "
+"FICHEIRO\n"
+"      --exclude-dir=GLOB    salta pastas que contêm GLOB\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match imprime só nomes de FICHEIROs sem linhas "
+"seleccionadas\n"
+"  -l, --files-with-matches  imprime só nomes de FICHEIROs com linhas "
+"seleccionadas\n"
+"  -c, --count               imprime só um nº  de linhas seleccionadas por "
+"FICHEIRO\n"
+"  -T, --initial-tab         alinha tabulações (se necessário)\n"
+"  -Z, --null                imprime byte 0 após o nome de FICHEIRO\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  imprime NUM linhas de contexto inicial\n"
+"  -A, --after-context=NUM   imprime NUM linhas de contexto final\n"
+"  -C, --context=NUM         imprime NUM linhas de contexto de saída\n"
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NUM                      igual a --context=NUM\n"
+"      --group-separator=SEP  imprimir SEP na linha entre correspondências "
+"com contexto\n"
+"      --no-group-separator  não imprimir separador para correspondências com "
+"contexto\n"
+"      --color[=QUANDO],\n"
+"      --colour[=QUANDO]       usar marcadores para realçar as cadeias "
+"coincidentes;\n"
+"                            QUANDO é \"always\", \"never\" ou \"auto\"\n"
+"  -U, --binary              não eliminar caracteres CR em EOL (MSDOS/"
+"Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Quando FICHEIRO é '-', lê a entrada padrão. Sem FICH, lê '.' se\n"
+"recursivo, senão lê '-'. Com menos de dois FICHs, assume -h.\n"
+"O estado da saída é 0 se qualquer linha for seleccionada, senão é 1;\n"
+"se ocorrer um erro e -q não for dado, o estado da saída é 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "especificou comparadores em conflito"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"Comparação Perl não suportada numa compilação --disable-perl-regexp build"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "comparador %s inválido"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "método dispositivos desconhecidos"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr "aviso: --unix-byte-offsets (-u) está obsoleto"
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "número máximo inválido"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "tipo de ficheiro binário desconhecido"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Escrito por Mike Haertel e outros; veja\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "falha ao alocar memória para a pilha PCRE JIT"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P só suporta idiomas unibyte e UTF-8"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "a opção -P só suporta um padrão"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "erro interno (nunca devia acontecer)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "excedido o limite de tamanho da linha de PCRE"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: memória esgotada"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: pilha PCRE JIT esgotada"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: excedido o limite de retrocesso de PCRE"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: limite de recursividade de PCRE excedido"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: erro interno de PCRE: %d"
+
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr ""
+#~ "aviso: GREP_OPTIONS é obsoleto; por favor, use um aliás ou um script"
+
+#~ msgid "warning: %s: %s"
+#~ msgstr "aviso: %s: %s"
+
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "Página inicial %s: <https://www.gnu.org/software/%s/>\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "Argumento \"%s\" de %s%s inválido"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "sufixo inválido no argumento \"%s\" de %s%s"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "argumento \"%s\" de %s%s muito grande"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "internal error"
+#~ msgstr "erro interno"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "contador de repetição não terminado"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "contador de repetição mal formado"
+
+#~ msgid "out of memory"
+#~ msgstr "sem memória"
+
+#~ msgid "writing output"
+#~ msgstr "a escrever o resultado"
+
+#~ msgid "Usage: %s [OPTION]... PATTERN [FILE] ...\n"
+#~ msgstr "Utilização: %s [OPÇÃO]... PADRÃO [FICHEIRO] ...\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE\n"
+#~ "                            TYPE is 'binary', 'text', or 'without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories\n"
+#~ "                            ACTION is 'read', 'recurse', or 'skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets\n"
+#~ "                            ACTION is 'read' or 'skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=PATTERN     files that match PATTERN will be examined\n"
+#~ "      --exclude=PATTERN     files that match PATTERN will be skipped.\n"
+#~ "      --exclude-from=FILE   files that match PATTERN in FILE will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match only print FILE names containing no match\n"
+#~ "  -l, --files-with-matches  only print FILE names containing matches\n"
+#~ "  -c, --count               only print a count of matching lines per "
+#~ "FILE\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Controlo de resultados\n"
+#~ "  -m, --max-count=NUM       pára após NUM resultados\n"
+#~ "  -b, --byte-offset         apresenta o 'byte offset' nos resultados\n"
+#~ "  -n, --line-number         apresenta o número de linha nos resultados\n"
+#~ "      --line-buffered       'flush output' em cada linha\n"
+#~ "  -H, --with-filename       apresenta o nome do ficheiro para cada "
+#~ "resultado\n"
+#~ "  -h, --no-filename         não apresenta o nome do ficheiro nos "
+#~ "resultados\n"
+#~ "      --label=NOME          utiliza NOME de ficheiro para o «standard "
+#~ "input»\n"
+#~ "  -o, --only-matching       apresenta só a parte da linha que satisfaz "
+#~ "PADRÃO\n"
+#~ "  -q, --quiet, --silent     suprime toda a apresentação de resultados\n"
+#~ "      --binary-files=TIPO   assume que ficheiros binários são do TIPO\n"
+#~ "                            TIPO pode ser 'binary', 'text', ou 'without-"
+#~ "match'\n"
+#~ "  -a, --text                equivalente a --binary-files=text\n"
+#~ "  -I                        equivalente a --binary-files=without-match\n"
+#~ "  -d, --directories=ACÇÃO   como lidar com directorias\n"
+#~ "                            ACÇÃO pode ser 'read', 'recurse', ou 'skip'\n"
+#~ "  -D, --devices=ACÇÃO       como lidar com devices, FIFOs e sockets\\n\"\n"
+#~ "                            ACÇÃO pode ser 'read' ou 'skip'\n"
+#~ "  -R, -r, --recursive       equivalente a --directories=recurse\n"
+#~ "      --include=PADRÃO      ficheiros que satisfaçam PADRÃO serão "
+#~ "examinados\n"
+#~ "      --exclude=PADRÃO      ficheiros que satisfaçam PADRÃo serão "
+#~ "ignorados\n"
+#~ "      --exclude-from=FICH   ficheiros que satisfaçam PADRÃO indicado em "
+#~ "FICH\n"
+#~ "                            serão ignorados\n"
+#~ "  -L, --files-without-match apresenta apenas FICHEIROS que não satisfaçam "
+#~ "PADRÃO\n"
+#~ "  -l, --files-with-matches  apresenta apenas FICHEIROS que satisfaçam o "
+#~ "PADRÃO\n"
+#~ "  -c, --count               apresenta para cada FICHEIRO um contador com "
+#~ "o\n"
+#~ "                            número de linhas que satisfazem PADRÃO\n"
+#~ "  -Z, --null                imprimir o byte 0 após cada nome de FICHEIRO\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Context control:\n"
+#~ "  -B, --before-context=NUM  print NUM lines of leading context\n"
+#~ "  -A, --after-context=NUM   print NUM lines of trailing context\n"
+#~ "  -C, --context=NUM         print NUM lines of output context\n"
+#~ "  -NUM                      same as --context=NUM\n"
+#~ "      --color[=WHEN],\n"
+#~ "      --colour[=WHEN]       use markers to distinguish the matching "
+#~ "string\n"
+#~ "                            WHEN may be `always', `never' or `auto'.\n"
+#~ "  -U, --binary              do not strip CR characters at EOL (MSDOS)\n"
+#~ "  -u, --unix-byte-offsets   report offsets as if CRs were not there "
+#~ "(MSDOS)\n"
+#~ "\n"
+#~ "`egrep' means `grep -E'.  `fgrep' means `grep -F'.\n"
+#~ "With no FILE, or when FILE is -, read standard input.  If less than\n"
+#~ "two FILEs given, assume -h.  Exit status is 0 if match, 1 if no match,\n"
+#~ "and 2 if trouble.\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Controlo de contexto:\n"
+#~ "  -B, --before-context=NUM  apresenta NUM linhas de contexto anteriores a "
+#~ "PADRÃO\n"
+#~ "  -A, --after-context=NUM   apresenta NUM linhas de contexto a seguir a "
+#~ "PADRÃO\n"
+#~ "  -C, --context=NUM         apresenta NUM linhas de contexto no "
+#~ "resultado\n"
+#~ "  -NUM                      equivalente a --context=NUM\n"
+#~ "      --color[=QUANDO],\n"
+#~ "      --colour[=QUANDO]     utiliza marcadores para distinguir as partes "
+#~ "que\n"
+#~ "                            satisfazem o PADRÃO\n"
+#~ "                            QUANDO pode ser `always', `never' ou `auto'\n"
+#~ "  -U, --binary              não remover caracteres CR em EOL (MSDOS)\n"
+#~ "  -u, --unix-byte-offsets   reportar «offsets» como se não houvesse CRs "
+#~ "(MSDOS)\n"
+#~ "\n"
+#~ "`egrep' é equivalente a  `grep -E'.  `fgrep' é equivalente a `grep -F'\n"
+#~ "Sem FICHEIRO ou quando FICHEIRO é -, ler o «standard input». Se forem "
+#~ "dados\n"
+#~ "dois FICHEIROS, assume -h. Devolve 0 se encontrar pelo menos uma "
+#~ "occorência\n"
+#~ "de PADRÃO, 1 se não encontrar, 2 se tiver algum problema.\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Report bugs to <bug-gnu-utils@gnu.org>.\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Reporte «bugs» para <bug-gnu-utils@gnu.org>.\n"
+
+#~ msgid "unknown directories method"
+#~ msgstr "método para acesso a directorias desconhecido"
+
+#~ msgid "%s (GNU grep) %s\n"
+#~ msgstr "%s (GNU grep) %s\n"
+
+#~ msgid ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+#~ msgstr ""
+#~ "Direitos de autor 1988, 1992-1999, 2000, 2001 Free Software Foundation, "
+#~ "Inc.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions. There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "Este software é software livre; leia o código fonte para saber as "
+#~ "condições.\n"
+#~ "NÃO existe qualquer garantia; nem mesmo sobre COMERCIALIZAÇÃO ou "
+#~ "CONFORMIDADE\n"
+#~ "PARA UM DETERMINADO FIM.\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "A opção -P e -z não podem ser combinadas"
+
+#~ msgid "%s: option `--%s' doesn't allow an argument\n"
+#~ msgstr "%s: a opção `%s' não aceita um argumento\n"
+
+#~ msgid "%s: unrecognized option `--%s'\n"
+#~ msgstr "%s: opção `--%s' desconhecida\n"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: opção ilegal -- %c\n"
+
+#~ msgid "%s: option `-W %s' is ambiguous\n"
+#~ msgstr "%s: a opção `-W %s' é ambígua\n"
+
+#~ msgid "%s: option `-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: a opção `-W %s' não aceita um argumento\n"
diff --git a/src/grep/po/pt_BR.gmo b/src/grep/po/pt_BR.gmo
new file mode 100644
index 0000000..aef8ec7
--- /dev/null
+++ b/src/grep/po/pt_BR.gmo
diff --git a/src/grep/po/pt_BR.po b/src/grep/po/pt_BR.po
new file mode 100644
index 0000000..68b3706
--- /dev/null
+++ b/src/grep/po/pt_BR.po
@@ -0,0 +1,966 @@
+# translation of grep-3.5.16.po to Brazilian Portuguese
+# This file is distributed under the same license as the grep package.
+# grep: translation to Brazilian Portuguese (pt_BR)
+# Copyright (C) 2002, 2007, 2008, 2009, 2011, 2012, 2014 Free Software Foundation, Inc.
+#
+# Enrique Melero Gómez <melero@eurolands.com>, 1996.
+# Rodrigo Stulzer Lopes <rodrigo@conectiva.com.br>, 1997.
+# Santiago Vila Doncel <sanvila@unex.es>, 1997, 1998, 1999, 2000, 2001, 2002.
+# Alexandre Folle de Menezes <afmenez@terra.com.br>, 2002.
+# Rodolfo Ribeiro Gomes <rodolforg@gmail.com>, 2007-2020.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: GNU grep-3.5.16\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2020-11-04 09:30-0300\n"
+"Last-Translator: Rodolfo Ribeiro Gomes <rodolforg@gmail.com>\n"
+"Language-Team: Brazilian Portuguese <ldpbr-translation@lists.sourceforge."
+"net>\n"
+"Language: pt_BR\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"Plural-Forms: nplurals=2; plural=(n > 1);\n"
+"X-Generator: Gtranslator 3.38.0\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "%s é um argumento inválido para %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "%s é um argumento ambíguo para %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Os argumentos válidos são:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "erro do programa"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "estouro de pilha"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "erro de escrita"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "[ sem correspondente"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "categoria de caracteres inválida"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "a sintaxe de categoria de caracteres é [[:space:]], e não [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "escape \\ não terminado"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "conteúdo inválido de \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "expressão regular grande demais"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "( sem correspondente"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "nenhuma sintaxe especificada"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr ") sem correspondente"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Erro desconhecido de sistema"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: a opção \"%s%s\" é ambígua\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: a opção \"%s%s\" é ambígua; possibilidades:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: a opção \"%s%s\" é desconhecida\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: a opção \"%s%s\" não aceita argumentos\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: a opção \"%s%s\" requer um argumento\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: a opção é inválida -- \"%c\"\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: a opção exige um argumento -- \"%c\"\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "memória esgotada"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "incapaz de memorizar o diretório de trabalho atual"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "falhou em retornar ao diretório de trabalho inicial"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "falhou em definir o modo texto/binário do descritor de arquivo"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "\""
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "\""
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Sucesso"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Nenhuma ocorrência do padrão"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Expressão regular inválida"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Caractere inválido de colagem"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Nome inválido de categoria de caracteres"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Barra invertida excedente ao final"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Retro-referência inválida"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Sem correspondência para [, [^, [:, [. ou [="
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "( ou \\( sem correspondente"
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "\\{ sem correspondente"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Conteúdo inválido de \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Fim inválido de intervalo"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Memória esgotada"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Expressão regular precedente é inválida"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Fim prematuro da expressão regular"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Expressão regular grande demais"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ") ou \\) sem correspondente"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Nenhuma expressão regular anterior"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Empacotado por %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Empacotado por %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "(C)"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Licença GPLv3+: GNU GPL versão 3 ou superior <%s>.\n"
+"Este é um software livre: você é livre para alterá-lo e redistribuí-lo.\n"
+"NÃO HÁ GARANTIAS, na máxima extensão permitida por lei.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Escrito por %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Escrito por %s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Escrito por %s, %s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s\n"
+"e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, %s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, %s, %s\n"
+"e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s e %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Escrito por %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s e outros.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "Relate os problemas para: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Relate os problemas de %s para: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "página de %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Ajuda geral sobre uso de software GNU: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(entrada padrão)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "argumento inválido para comprimento do contexto"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "entrada longa demais para contar"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: arquivo binário coincide com o padrão"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: aviso: recursão cíclica de diretório"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: o arquivo de entrada também é o de saída"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Uso: %s [OPÇÃO]... PADRÕES [ARQUIVO]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Experimente \"%s --help\" para mais informações.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Busca por PADRÕES em cada ARQUIVO.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Exemplo: %s -i \"olá, mundo\" menu.h main.c\n"
+"PADRÕES pode conter múltiplos padrões separados por nova-linha.\n"
+"\n"
+"Seleção e interpretação de padrão:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     PADRÕES são expressões regulares estendidas\n"
+"  -F, --fixed-strings       PADRÕES são textos\n"
+"  -G, --basic-regexp        PADRÕES são expressões regulares básicas\n"
+"  -P, --perl-regexp         PADRÕES são expressões regulares Perl\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=PADRÕES      usa PADRÕES para coincidir\n"
+"  -f, --file=ARQUIVO        obtém PADRÕES contidos no ARQUIVO\n"
+"  -i, --ignore-case         ignora diferenças entre maiúsculas/minúsculas "
+"nos\n"
+"                              padrões e dados\n"
+"      --no-ignore-case      não ignora diferença de maiusculizações "
+"(padrão)\n"
+"  -w, --word-regexp         coincide só com palavras completas\n"
+"  -x, --line-regexp         coincide só com linhas inteiras\n"
+"  -z, --null-data           uma linha de dados termina com byte 0, e não "
+"com\n"
+"                              caractere de nova linha\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Miscelânea:\n"
+"  -s, --no-messages         suprime mensagens de erro\n"
+"  -v, --invert-match        seleciona somente linhas não coincidentes\n"
+"  -V, --version             mostra informações sobre versão e sai\n"
+"      --help                exibe esta ajuda e sai\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Controle de saída:\n"
+"  -m, --max-count=NÚM       interrompe depois de NÚM ocorrências\n"
+"  -b, --byte-offset         emite a posição em bytes nas linhas de saída\n"
+"  -n, --line-number         emite o número da linha nas linhas de saída\n"
+"      --line-buffered       libera a saída a cada linha\n"
+"  -H, --with-filename       emite o nome do arquivo nas linhas de saída\n"
+"  -h, --no-filename         inibe o nome de arquivo na saída\n"
+"      --label=RÓTULO        usa RÓTULO como nome de arquivo para entrada "
+"padrão\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       mostra apenas as partes não-vazias das linhas "
+"que\n"
+"                              coincidem com os PADRÕES\n"
+"  -q, --quiet, --silent     inibe todas as mensagens normais de saída\n"
+"      --binary-files=TIPO   assume que arquivos binários são TIPO;\n"
+"                             TIPO pode ser \\\"binary\\\" (binário), \\\"text"
+"\\\" (texto),\n"
+"                             ou \\\"without-match\\\" (nunca coincide)\n"
+"  -a, --text                equivalente a --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        equivalente a --binary-files=without-match\n"
+"  -d, --directories=AÇÃO    como tratar diretórios;\n"
+"                             AÇÃO pode ser \\\"read\\\" (ler), \\\"recurse\\"
+"\" (recursivo),\n"
+"                             ou \\\"skip\\\" (ignorar)\n"
+"  -D, --devices=AÇÃO        como tratar dispositivos, FIFOs e soquetes;\n"
+"                             AÇÃO pode ser \\\"read\\\" (ler) ou \\\"skip\\"
+"\" (ignorar)\n"
+"  -r, --recursive           equivalente a --directories=recurse\n"
+"  -R, --dereference-recursive  similar, mas segue todas as ligações "
+"simbólicas\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=PADRÃO      busca apenas em arquivos que casam com PADRÃO\n"
+"      --exclude=PADRÃO      ignora arquivos que casam com PADRÃO\n"
+"      --exclude-from=ARQUI  ignora arquivos que casam com algum padrão de\n"
+"                              arquivo contido em ARQUIvo\n"
+"      --exclude-dir=PADRÃO  ignora diretórios que casam com PADRÃO\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match emite apenas os nomes dos ARQUIVOs sem linhas\n"
+"                              selecionadas\n"
+"  -l, --files-with-matches  emite apenas os nomes dos ARQUIVOs com linhas\n"
+"                              selecionadas\n"
+"  -c, --count               emite apenas a contagem de linhas selecionadas\n"
+"                              por ARQUIVO\n"
+"  -T, --initial-tab         alinha por tabulação (se necessário)\n"
+"  -Z, --null                emite byte 0 depois do nome do ARQUIVO\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Controle de contexto:\n"
+"  -B, --before-context=NÚM  emite NÚM linhas de contexto anteriores\n"
+"  -A, --after-context=NÚM   emite NÚM linhas de contexto posteriores\n"
+"  -C, --context=NÚM         emite NÚM linhas de contexto de saída\n"
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NÚM                      o mesmo que --context=NÚM\n"
+"      --color[=QUANDO],\n"
+"      --colour[=QUANDO]     usa marcadores para destacar os textos "
+"coincidentes;\n"
+"                              QUANDO pode ser \"always\" (sempre), \"never"
+"\"\n"
+"                              (nunca) ou \"auto\" (automático).\n"
+"  -U, --binary              não exclui caracteres CR no fim de linha (MSDOS/"
+"Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Quando ARQUIVO é \"-\", lê da entrada padrão. Se ARQUIVO não é informado, lê "
+"\".\"\n"
+"se recursivo, senão lê \"-\". Se há menos que dois ARQUIVOs, assume-se -h.\n"
+"O estado de saída é 0 se alguma linha é selecionada, 1 em caso contrário;\n"
+"se ocorrer algum erro e -q não é especificado, o estado de saída é 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "especificou-se padrões de busca conflitantes"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"não há suporte para coincidir conforme Perl em uma compilação com --disable-"
+"perl-regexp"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "comparador inválido %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "método desconhecido de dispositivos"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "valor máximo inválido"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "tipo de arquivo binário desconhecido"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Escrito por Mike Haertel e outros; veja\n"
+"<http://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>"
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "falhou em alocar memória para a pilha de PCRE JIT"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr ""
+"-P só oferece suporte a localidades unibyte (um caractere por byte) e UTF-8"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "a opção -P só oferece suporte a apenas um único padrão"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "erro interno (nunca deveria acontecer)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "atingiu o limite de comprimento de linha das PCRE"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: memória esgotada"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: pilha PCRE JIT estourada"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: atingiu o limite de backtracking das PCRE"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: atingiu o limite de recursão das PCRE"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: erro interno de PCRE: %d"
+
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr ""
+#~ "aviso: a variável de ambiente GREP_OPTIONS está obsoleta; use um alias ou "
+#~ "script"
+
+#~ msgid "warning: %s: %s"
+#~ msgstr "aviso: %s: %s"
+
+#~ msgid "%s home page: <http://www.gnu.org/software/%s/>\n"
+#~ msgstr "página de %s: <http://www.gnu.org/software/%s/>\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "argumento inválido para %s%s: \"%s\""
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "sufixo inválido no argumento para %s%s: \"%s\""
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "%s%s: argumento \"%s\" é grande demais"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "internal error"
+#~ msgstr "erro interno"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: a opção \"--%s\" não aceita argumentos\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: a opção \"--%s\" é desconhecida\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: a opção \"-W %s\" é ambígua\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: a opção \"-W %s\" não aceita argumentos\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: a opção \"-W %s\" requer um argumento\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "a movimentação pelo arquivo (lseek) falhou"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "PADRÃO é, por padrão, uma expressão regular básica (BRE).\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "\"egrep\" significa \"grep -E\". \"fgrep\" significa \"grep -F\".\n"
+#~ "A invocação direta tanto por \"egrep\" como por \"fgrep\" está obsoleta.\n"
+
+#~ msgid "unescaped ^ or $ not supported with -Pz"
+#~ msgstr "não há suporte para ^ ou $ sem escape ao usar -Pz"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "PADRÃO é uma expressão regular estendida (ERE).\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr "Invocar como \"egrep\" está obsoleto; use \"grep -E\".\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr ""
+#~ "PADRÃO é um conjunto de textos fixos separados por caractere de nova "
+#~ "linha.\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr "Invocar como \"fgrep\" está obsoleto; use \"grep -F\".\n"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "Página do GNU Grep: <%s>\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s só pode usar a sintaxe de padrão %s"
+
+#~ msgid "the --mmap option has been a no-op since 2010"
+#~ msgstr "a opção --mmap não faz nada desde 2010"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "contador de repetição não terminado"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "contador de repetição mal formulado"
+
+#~ msgid "writing output"
+#~ msgstr "escrevendo na saída"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity needs a value (\"=...\"); "
+#~ "skipped"
+#~ msgstr ""
+#~ "em GREP_COLORS=\"%s\", o recurso \"%s\" precisa de um valor (\"=...\"); "
+#~ "ignorado"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity is boolean and cannot take a "
+#~ "value (\"=%s\"); skipped"
+#~ msgstr ""
+#~ "em GREP_COLORS=\"%s\", o recurso \"%s\" é booleano e não pode assumir um "
+#~ "valor (\"=%s\"); ignorado"
+
+#~ msgid "in GREP_COLORS=\"%s\", the \"%s\" capacity %s"
+#~ msgstr "em GREP_COLORS=\"%s\", o recurso \"%s\" %s."
+
+#~ msgid ""
+#~ "stopped processing of ill-formed GREP_COLORS=\"%s\" at remaining "
+#~ "substring \"%s\""
+#~ msgstr ""
+#~ "interrompido o processamento da variável mal formatada GREP_COLORS=\"%s\" "
+#~ "no trecho de texto restante \"%s\""
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE;\n"
+#~ "                            TYPE is `binary', `text', or `without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories;\n"
+#~ "                            ACTION is `read', `recurse', or `skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+#~ "                            ACTION is `read' or `skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=FILE_PATTERN  search only files that match FILE_PATTERN\n"
+#~ "      --exclude=FILE_PATTERN  skip files and directories matching "
+#~ "FILE_PATTERN\n"
+#~ "      --exclude-from=FILE   skip files matching any file pattern from "
+#~ "FILE\n"
+#~ "      --exclude-dir=PATTERN directories that match PATTERN will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match print only names of FILEs containing no "
+#~ "match\n"
+#~ "  -l, --files-with-matches  print only names of FILEs containing matches\n"
+#~ "  -c, --count               print only a count of matching lines per "
+#~ "FILE\n"
+#~ "  -T, --initial-tab         make tabs line up (if needed)\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Controle de saída:\n"
+#~ "  -m, --max-count=NÚM       interrompe depois de NÚM coincidências\n"
+#~ "  -b, --byte-offset         exibe a posição em bytes junto com a saída\n"
+#~ "  -n, --line-number         exibe o número da linha junto com a saída\n"
+#~ "      --line-buffered       libera a saída a cada linha\n"
+#~ "  -H, --with-filename       exibe o nome do arquivo para cada padrão "
+#~ "encontrado\n"
+#~ "  -h, --no-filename         inibe o nome de arquivo na saída\n"
+#~ "      --label=RÓTULO        mostra RÓTULO como o nome da entrada padrão\n"
+#~ "  -o, --only-matching       mostra apenas a parte da linha que coincide "
+#~ "com\n"
+#~ "                              o PADRÃO\n"
+#~ "  -q, --quiet, --silent     inibe todas as mensagens de saída normais\n"
+#~ "      --binary-files=TIPO   assume que arquivos binários são TIPO\n"
+#~ "                             TIPO pode ser \"binary\" (binário), \"text"
+#~ "\" (texto),\n"
+#~ "                             ou \"without-match\" (nunca coincide).\n"
+#~ "  -a, --text                equivalente a --binary-files=text\n"
+#~ "  -I                        equivalente a --binary-files=without-match\n"
+#~ "  -d, --directories=AÇÃO    como tratar diretórios;\n"
+#~ "                            AÇÃO pode ser \"read\" (ler), \"recurse"
+#~ "\" (recursivo),\n"
+#~ "                            ou \"skip\" (ignorar).\n"
+#~ "  -D, --devices=AÇÃO        como tratar dispositivos, FIFOs e soquetes;\n"
+#~ "                            AÇÃO pode ser \"read\" (ler) ou \"skip"
+#~ "\" (ignorar)\n"
+#~ "  -R, -r, --recursive       equivalente a --directories=recurse.\n"
+#~ "      --include=PADRÃO_ARQ  busca apenas em arquivos que casam com "
+#~ "PADRÃO_ARQ\n"
+#~ "      --exclude=PADRÃO_ARQ  ignora arquivos que casam com PADRÃO_ARQ\n"
+#~ "      --exclude-from=ARQUI  ignora arquivos que casam com algum padrão "
+#~ "escrito\n"
+#~ "                              em ARQUIvo\n"
+#~ "      --exclude-dir=PADRÃO  diretórios que casam com PADRÃO serão "
+#~ "ignorados\n"
+#~ "  -L, --files-without-match exibe os nomes somente dos arquivos não "
+#~ "casam\n"
+#~ "                              com o PADRÃO\n"
+#~ "  -l, --files-with-matches  exibe os nomes somente dos arquivos casam "
+#~ "com\n"
+#~ "                              o padrão\n"
+#~ "  -c, --count               exibe a contagem de linhas por aquivo que "
+#~ "casam\n"
+#~ "                              com o padrão\n"
+#~ "  -T, --initial-tab         alinha por tabulação (se necessário)\n"
+#~ "  -Z, --null                emite byte 0 depois do nome do ARQUIVO\n"
+
+#~ msgid "unknown directories method"
+#~ msgstr "método desconhecido de diretórios"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "As opções -P e -z não podem ser combinadas"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: opção ilegal -- %c\n"
diff --git a/src/grep/po/quot.sed b/src/grep/po/quot.sed
new file mode 100644
index 0000000..0122c46
--- /dev/null
+++ b/src/grep/po/quot.sed
@@ -0,0 +1,6 @@
+s/"\([^"]*\)"/“\1”/g
+s/`\([^`']*\)'/‘\1’/g
+s/ '\([^`']*\)' / ‘\1’ /g
+s/ '\([^`']*\)'$/ ‘\1’/g
+s/^'\([^`']*\)' /‘\1’ /g
+s/“”/""/g
diff --git a/src/grep/po/remove-potcdate.sin b/src/grep/po/remove-potcdate.sin
new file mode 100644
index 0000000..2436c49
--- /dev/null
+++ b/src/grep/po/remove-potcdate.sin
@@ -0,0 +1,19 @@
+# Sed script that remove the POT-Creation-Date line in the header entry
+# from a POT file.
+#
+# The distinction between the first and the following occurrences of the
+# pattern is achieved by looking at the hold space.
+/^"POT-Creation-Date: .*"$/{
+x
+# Test if the hold space is empty.
+s/P/P/
+ta
+# Yes it was empty. First occurrence. Remove the line.
+g
+d
+bb
+:a
+# The hold space was nonempty. Following occurrences. Do nothing.
+x
+:b
+}
diff --git a/src/grep/po/ro.gmo b/src/grep/po/ro.gmo
new file mode 100644
index 0000000..1cc128d
--- /dev/null
+++ b/src/grep/po/ro.gmo
diff --git a/src/grep/po/ro.po b/src/grep/po/ro.po
new file mode 100644
index 0000000..b750228
--- /dev/null
+++ b/src/grep/po/ro.po
@@ -0,0 +1,940 @@
+# Mesajele în limba română pentru grep.
+# This file is distributed under the same license as the grep package.
+# Copyright (C) 2003 Free Software Foundation, Inc.
+# Eugen Hoanca <eugenh@urban-grafx.ro>, 2003.
+# Florentina Mușat <florentina.musat.28@gmail.com>, 2020.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 3.3.42\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2020-06-24 11:09+0300\n"
+"Last-Translator: Florentina Mușat <florentina.musat.28@gmail.com>\n"
+"Language-Team: Romanian <translation-team-ro@lists.sourceforge.net>\n"
+"Language: ro\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"X-Generator: Poedit 2.3.1\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "argument nevalid %s pentru %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "argument ambiguu %s pentru %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Argumentele valide sunt:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "eroare de program"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "supraplin de stivă"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "eroare de scriere"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "[ nebalansat"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "clasă de caractere nevalidă"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "sintaxa de clasă de caractere este [[:spațiu:]], nu [:spațiu]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "\\ escape neterminat"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "\\{\\} conținut nevalid"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "expresia regulată este prea mare"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "( nebalansat"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "nu s-a specificat nicio sintaxă"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr ") nebalansat"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Eroare de sistem necunoscută"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: opțiunea „%s%s” este ambiguă\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: opțiunea „%s%s” este ambiguă; posibilități:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: opțiunea nerecunoscută „%s%s”\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: opțiunea „%s%s” nu permite un argument\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: opțiunea „%s%s” necesită un argument\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: opțiune nevalidă -- „%c”\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: opțiunea necesită un argument -- „%c”\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "memorie plină"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "nu s-a putut înregistra directorul de lucru curent"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "nu s-a putut întoarce la directorul de lucru inițial"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "nu s-a putut stabili modul de text/binar al descriptorului de fișier"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "`"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "'"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Succes"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Nu există potrivire"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Expresie regulată nevalidă"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Caracter de ordine alfabetică nevalid"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Nume de clasă de caracter nevalid"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Linie oblică inversă de urmărire"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Referință înapoi nevalidă"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "[, [^, [:, [., sau [= fără pereche"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "( sau \\( fără pereche"
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "\\{ fără pereche"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Conținut nevalid al \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Sfârșit de interval nevalid"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Memorie plină"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Expresie regulată precedentă nevalidă"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Sfârșit prematur al expresiei regulate"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Expresie regulată prea mare"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ") sau \\) fără pereche"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Nu există o expresie regulată anterioară"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Împachetat de %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Împachetat de %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "(C)"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Licența GPLv3+: GNU GPL versiunea 3 sau mai mare <%s>.\n"
+"Acesta este software liber: sunteți liber să îl modificați și să îl "
+"redistribuiți.\n"
+"NU există NICIO GARANȚIE, în măsura permisă de lege.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Scris de %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Scris de %s și %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Scris de %s, %s și %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Scris de %s, %s, %s,\n"
+"și %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Scris de %s, %s, %s,\n"
+"%s, și %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Scris de %s, %s, %s,\n"
+"%s, %s, și %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Scris de %s, %s, %s,\n"
+"%s, %s, %s, și %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Scris de %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"și %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Scris de %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, și %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Scris de %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, și alții.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "Raportați defecțiunile la: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Raportați defecțiunile %s la: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "%s pagină principală: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Ajutor general utilizând software GNU: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(intrare standard)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "parametru lungime context invalid"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "intrarea(input) este prea mare pentru numărare"
+
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "Fişierul binar %s corespunde\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "buclă recursivă de directoare"
+
+#: src/grep.c:1899
+#, fuzzy, c-format
+msgid "%s: input file is also the output"
+msgstr "fișierul de intrare %s este de asemenea și ieșirea"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Utilizare: %s [OPȚIUNE]... MODELE [FIȘIER]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Încercați „%s --help” pentru mai multe informații.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Caută pentru MODELE în fiecare FIȘIER.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Exemplu: %s -i 'hello world' menu.h main.c\n"
+"MODELELE pot conține modele multiple separate prin linii noi.\n"
+"\n"
+"Selectarea modelelor și interpretarea:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     MODELELE sunt expresii regulate extinse\n"
+"  -F, --fixed-strings       MODELELE sunt șiruri\n"
+"  -G, --basic-regexp        MODELELE sunt expresii regulate de bază\n"
+"  -P, --perl-regexp         MODELELE sunt expresii regulate PERL\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=MODELE     utilizează MODELELE pentru potrivire\n"
+"  -f, --file=FIȘIER           ia MODELELE de la FIȘIER\n"
+"  -i, --ignore-case         ignoră distincțiile de majuscule în modele și "
+"date\n"
+"      --no-ignore-case      nu ignora distincțiile de majuscule (implicit)\n"
+"  -w, --word-regexp         potrivește doar cuvinte întregi\n"
+"  -x, --line-regexp         potrivește doar linii întregi\n"
+"  -z, --null-data           o linie de date se termină în octetul 0, nu în "
+"linie nouă\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Diverse:\n"
+"  -s, --no-messages         suprimă mesajele de eroare\n"
+"  -v, --invert-match        selectează liniile care nu se potrivesc\n"
+"  -V, --version             afișează informațiile de versiune și ieși\n"
+"      --help                afișează acest text de ajutor și ieși\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Control de ieșire:\n"
+"  -m, --max-count=NUM       oprește după NUM linii selectate\n"
+"  -b, --byte-offset        tipărește decalajul de octet cu liniile de "
+"ieșire\n"
+"  -n, --line-number         tipărește numărul liniei cu liniile de ieșire\n"
+"      --line-buffered       golește ieșirea la fiecare linie\n"
+"  -H, --with-filename       tipărește numele fișierului cu liniile de "
+"ieșire\n"
+"  -h, --no-filename         suprimă prefixul numelui de fișier la ieșire\n"
+"      --label=ETICHETĂ         utilizează ETICHETĂ ca prefixul numelui de "
+"fișier de intrare standard\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       arată doar părțile pline ale liniilor care se "
+"potrivesc\n"
+"  -q, --quiet, --silent     suprimă toată ieșirea normală\n"
+"      --binary-files=TIP   presupune că fișierele binare sunt TIP;\n"
+"                            TIP este „binar”, „text” sau „fără-potrivire”\n"
+"  -a, --text                echivalent cu --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        echivalent cu --binary-files=fără-potrivire\n"
+"  -d, --directories=ACȚIUNE  cum să se manipuleze directoarele;\n"
+"                            ACȚIUNE este „citește”, „recursivitate”, sau "
+"„omite”\n"
+"  -D, --devices=ACȚIUNE      cum să se manipuleze dispozitive, FIFO-uri și "
+"socluri;\n"
+"                            ACȚIUNE este „citește” sau „omite”\n"
+"  -r, --recursive           like --directories=recursivitate\n"
+"  -R, --dereference-recursive  de asemenea, dar urmărește toate legăturile "
+"simbolice\n"
+
+#: src/grep.c:2023
+#, fuzzy, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=GLOB        caută doar fișiere care se potrivesc cu GLOB (un "
+"model de fișier)\n"
+"      --exclude=GLOB        omite fișierele și directoarele care se "
+"potrivesc cu GLOB\n"
+"      --exclude-from=FIȘIER   omite fișierele care se potrivesc oricărui "
+"model de la FIȘIER\n"
+"      --exclude-dir=GLOB    omite directoarele care se potrivesc cu GLOB\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match  tipărește doar numele de FIȘIERE fără linii "
+"selectate\n"
+"  -l, --files-with-matches  tipărește doar numele de FIȘIERE cu linii "
+"selectate\n"
+"  -c, --count               tipărește doar un număr al liniilor selectate "
+"per FIȘIER\n"
+"  -T, --initial-tab         face ca tab-urile să fie aliniate (dacă este "
+"nevoie)\n"
+"  -Z, --null                tipărește octetul 0 după numele de FIȘIER\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Control de context:\n"
+"  -B, --before-context=NUM  tipărește NUM linii ale contextului de început\n"
+"  -A, --after-context=NUM   tipărește NUM linii ale contextului de urmărire\n"
+"  -C, --context=NUM         tipărește NUM linii al contextului de ieșire\n"
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NUM                      la fel ca--context=NUM\n"
+"      --color[=CÂND],\n"
+"      --colour[=CÂND]       utilizează markere pentru a evidenția șirurile "
+"care se potrivesc;\n"
+"                            CÂND este „totdeauna”, „niciodată” sau „auto”\n"
+"  -U, --binary              nu elimina caracterele CR la EOL (MSDOS/"
+"Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, fuzzy, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Când FILE este „-”, citește intrarea standard.  Cu niciun FIȘIER, citește "
+"„.” dacă\n"
+"este recursiv,„-” altfel.  Cu mai puțin de două FIȘIERE, presupune -h.\n"
+"Starea de ieșire este 0 dacă orice linie (sau fișier dacă -L) este "
+"selectată, 1 altfel;\n"
+"dacă orice eroare se întâmplă -q nu este dat, starea de ieșire este 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "conflicte între căutătorii (matchers) specificaţi"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"Potrivirea Perl nu este suportată într-o generare --disable-perl-regexp"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "potrivire nevalidă %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "metodă dispozitive(devices) necunoscută"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "numărare maximă invalidă"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "tip fişiere-binare necunoscut"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Scris de Mike Haertel și alții; consultați\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "nu s-a putut aloca memorie pentru stiva PCRE JIT"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P suportă doar localizări unioctet și UTF-8"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "opțiunea -P suportă doar un singur model"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "eroare internă (nu ar trebui să se întâmple vreodată)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "s-a depășit limita de lungime a liniei al PCRE"
+
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "memorie plină"
+
+#: src/pcresearch.c:310
+#, fuzzy, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "s-a epuizat stiva PCRE JIT"
+
+#: src/pcresearch.c:315
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "s-a depășit limita de backtracking al PCRE"
+
+#: src/pcresearch.c:319
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "s-a depășit limita de backtracking al PCRE"
+
+#: src/pcresearch.c:327
+#, fuzzy, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "eroare PCRE internă: %d"
+
+#, c-format
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr ""
+#~ "avertisment: GREP_OPTIONS este depășit; utilizați un alias sau un script"
+
+#, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "avertisment: %s: %s"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "numărare repetată neterminată"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "numărare repetată malformată"
+
+#~ msgid "out of memory"
+#~ msgstr "memorie plină"
+
+#~ msgid "writing output"
+#~ msgstr "scriere output"
+
+#~ msgid "Usage: %s [OPTION]... PATTERN [FILE] ...\n"
+#~ msgstr "Folosire: %s [OPŢIUNE]... TIPAR [FIŞIER]...\n"
+
+#~ msgid ""
+#~ "Search for PATTERN in each FILE or standard input.\n"
+#~ "Example: %s -i 'hello world' menu.h main.c\n"
+#~ "\n"
+#~ "Regexp selection and interpretation:\n"
+#~ msgstr ""
+#~ "Caută după TIPAR în fiecare FIşIER sau de la intrare standard.\n"
+#~ "Exemplu: %s -i 'hello world' menu.h main.c\n"
+#~ "\n"
+#~ "Selecţie şi interpretare regexp:\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE\n"
+#~ "                            TYPE is 'binary', 'text', or 'without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories\n"
+#~ "                            ACTION is 'read', 'recurse', or 'skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets\n"
+#~ "                            ACTION is 'read' or 'skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=PATTERN     files that match PATTERN will be examined\n"
+#~ "      --exclude=PATTERN     files that match PATTERN will be skipped.\n"
+#~ "      --exclude-from=FILE   files that match PATTERN in FILE will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match only print FILE names containing no match\n"
+#~ "  -l, --files-with-matches  only print FILE names containing matches\n"
+#~ "  -c, --count               only print a count of matching lines per "
+#~ "FILE\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Control ieşire (output)l:\n"
+#~ "  -m, --max-count=NUM       oprire după NUM potriviri\n"
+#~ "  -b, --byte-offset         tipăreşte locaţia (byte offset) cu liniile "
+#~ "rezultate\n"
+#~ "  -n, --line-number         tipăreşte numărul liniei cu liniile "
+#~ "rezultate\n"
+#~ "      --line-buffered       înnoieşte (flush) outputul la fiecare linie\n"
+#~ "  -H, --with-filename       tipăreşte numele de fişier care corespund\n"
+#~ "  -h, --no-filename         suprimă prefixarea cu nume de fişier la "
+#~ "output\n"
+#~ "      --label=ETICHETĂ      tipăreşte ETICHETĂ ca nume fişier pentru "
+#~ "intrare standard\n"
+#~ "  -o, --only-matching       afişează doar o parte a unei linii "
+#~ "corespunzătoare TIPARului\n"
+#~ "  -q, --quiet, --silent     suprimă tot outputul\n"
+#~ "      --binary-files=TiP    presupune ca fişierele binare sunt TIP\n"
+#~ "                            unde TIP este 'binary', 'text', sau 'without-"
+#~ "match'\n"
+#~ "  -a, --text                echivalent cu --binary-files=text\n"
+#~ "  -I                        echivalent cu --binary-files=without-match\n"
+#~ "  -d, --directories=ACŢIUNE mod de manipulare al directoarelor\n"
+#~ "                            ACŢIUNE este 'read', 'recurse', sau 'skip'\n"
+#~ "  -D, --devices=ACŢIUNE     mod de manipulare device-uri, FIFOuri şi "
+#~ "sockeţi\n"
+#~ "                            ACŢIUNE este 'read' sau 'skip'\n"
+#~ "  -R, -r, --recursive       echivalent cu --directories=recurse\n"
+#~ "      --include=TIPAR       fişierele potrivite TIPARului vor fi "
+#~ "examinate\n"
+#~ "      --exclude=TIPAR       fişierele potrivite TIPARului vor fi omise.\n"
+#~ "      --exclude-from=FIŞIER fişierele potrivite TIPARului în FIŞIER vor "
+#~ "fi omise.\n"
+#~ "  -L, --files-without-match afişează doar nume FIŞIERe care nu corespund\n"
+#~ "  -l, --files-with-matches  afişează doar nume FIŞIERe care corespund\n"
+#~ "  -c, --count               afişează doar numărul de potriviri per "
+#~ "FIŞIER\n"
+#~ "  -Z, --null                tipăreşte octet 0 după nume FIŞIER\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Context control:\n"
+#~ "  -B, --before-context=NUM  print NUM lines of leading context\n"
+#~ "  -A, --after-context=NUM   print NUM lines of trailing context\n"
+#~ "  -C, --context=NUM         print NUM lines of output context\n"
+#~ "  -NUM                      same as --context=NUM\n"
+#~ "      --color[=WHEN],\n"
+#~ "      --colour[=WHEN]       use markers to distinguish the matching "
+#~ "string\n"
+#~ "                            WHEN may be `always', `never' or `auto'.\n"
+#~ "  -U, --binary              do not strip CR characters at EOL (MSDOS)\n"
+#~ "  -u, --unix-byte-offsets   report offsets as if CRs were not there "
+#~ "(MSDOS)\n"
+#~ "\n"
+#~ "`egrep' means `grep -E'.  `fgrep' means `grep -F'.\n"
+#~ "With no FILE, or when FILE is -, read standard input.  If less than\n"
+#~ "two FILEs given, assume -h.  Exit status is 0 if match, 1 if no match,\n"
+#~ "and 2 if trouble.\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Control de context:\n"
+#~ "  -B, --before-context=NUM  tipăreşte NUM linii dinainte de context\n"
+#~ "  -A, --after-context=NUM   tipăreşte NUM linii de după context\n"
+#~ "  -C, --context=NUM         tipăreşte NUM linii de context\n"
+#~ "  -NUM                      la fel ca şi --context=NUM\n"
+#~ "      --color[=CÂND],\n"
+#~ "      --colour[=CÂND]       foloseşte marcaje pentru a deosebi şirurile "
+#~ "potrivite\n"
+#~ "                            CÂND poate fi `always', `never' sau `auto'.\n"
+#~ "  -U, --binary              nu renunţa la caractere CR la EOL (MSDOS)\n"
+#~ "  -u, --unix-byte-offsets   declară offset ca şi cum CR n-ar fi "
+#~ "acolo(MSDOS)\n"
+#~ "\n"
+#~ "`egrep' înseamnă `grep -E'.  `fgrep' înseamnă `grep -F'.\n"
+#~ "Fără FIŞIER, sau când FIŞIER este -, se citeşte intrarea standard. Dacă "
+#~ "se dau\n"
+#~ "mai puţin de 2 FIŞIERe, se presupune -h. Starea de ieşire e 0 pentru\n"
+#~ "corespunzător, 1 pentru necorespunzător, şi 2 pentru probleme.\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Report bugs to <bug-gnu-utils@gnu.org>.\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Raportaţi buguri la <bug-gnu-utils@gnu.org>.\n"
+
+#~ msgid "unknown directories method"
+#~ msgstr "metodă directoare necunoscută"
+
+#~ msgid "%s (GNU grep) %s\n"
+#~ msgstr "%s (GNU grep) %s\n"
+
+#~ msgid ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+#~ msgstr ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions. There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "Acesta este software liber; vedeţi sursele pentru condiţii de copiere. "
+#~ "NU\n"
+#~ "există nici o garanţie; nici măcar pentru VANDABILITATE sau POTRIVIRE\n"
+#~ "PENTRU UN SCOP ANUME.\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "Opţiunile -P şi -z nu pot fi combinate"
+
+#~ msgid "%s: option `--%s' doesn't allow an argument\n"
+#~ msgstr "%s: opţiunea `--%s' nu permite un parametru\n"
+
+#~ msgid "%s: unrecognized option `--%s'\n"
+#~ msgstr "%s: opţiune necunoscută `--%s'\n"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: opţiune ilegală -- %c\n"
+
+#~ msgid "%s: option `-W %s' is ambiguous\n"
+#~ msgstr "%s: opţiunea `-W %s' este ambiguă\n"
+
+#~ msgid "%s: option `-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: opţiunea `-W %s' nu permite un parametru\n"
diff --git a/src/grep/po/ru.gmo b/src/grep/po/ru.gmo
new file mode 100644
index 0000000..dcd99a4
--- /dev/null
+++ b/src/grep/po/ru.gmo
diff --git a/src/grep/po/ru.po b/src/grep/po/ru.po
new file mode 100644
index 0000000..e3933ef
--- /dev/null
+++ b/src/grep/po/ru.po
@@ -0,0 +1,876 @@
+# translation of grep-2.6.ru.po to Russian
+# Локализация для grep.
+# Copyright (C) 1997, 1998, 1999, 2000, 2009, 2010 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+#
+# Denis Perchine <dyp@perchine.com>, 1998-2000.
+# Yuri Kozlov <yuray@komyakino.ru>, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021.
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 3.6.27\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-08-10 06:59+0300\n"
+"Last-Translator: Yuri Kozlov <yuray@komyakino.ru>\n"
+"Language-Team: Russian <gnu@d07.ru>\n"
+"Language: ru\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"X-Generator: Lokalize 20.12.0\n"
+"Plural-Forms:  nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && n"
+"%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2);\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "неверный аргумент %s для %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "двусмысленный аргумент %s для %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Допустимые аргументы:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "ошибка программы"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "переполнение стека"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "ошибка записи"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "несбалансированная ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "неправильный класс символов"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "синтаксис класса символов: [[:space:]], а не [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "незавершённая \\ экранирующая последовательность"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "неправильное содержимое в \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "регулярное выражение слишком большое"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "несбалансированная ("
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "не указан синтаксис"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "несбалансированная )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Неизвестная системная ошибка"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: двусмысленный параметр «%s%s»\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: двусмысленный параметр «%s%s»; возможные варианты:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: нераспознанный параметр «%s%s»\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: для параметра «%s%s» нельзя использовать аргумент\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: для параметра «%s%s» требуется аргумент\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: неверный параметр «%c»\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: параметру требуется аргумент «%c»\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "память исчерпана"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "не удалось запомнить текущий рабочий каталог"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "не удалось вернуться в начальный рабочий каталог"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "не удалось изменить текстовый/двоичный режим у файлового дескриптора"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "«"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "»"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Выполнено успешно"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Нет совпадений"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Неправильное регулярное выражение"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Неправильный символ сравнения"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Неправильное имя класса символов"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Завершающий символ обратной косой черты"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Неправильная обратная ссылка"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Непарная [, [^, [:, [. или [="
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "Непарная ( или \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "Непарная \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Неправильное содержимое в \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Неправильный конец диапазона"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Память исчерпана"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Неправильное предшествующее регулярное выражение"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Преждевременное завершение регулярного выражения"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Регулярное выражение слишком большое"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "Непарная ) или \\)"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Нет предыдущего регулярного выражения"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Упакован %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Упакован %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "(C)"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Лицензия GPLv3+: GNU GPL версии 3 или новее <%s>.\n"
+"Это свободное ПО: вы можете изменять и распространять его.\n"
+"Нет НИКАКИХ ГАРАНТИЙ в пределах действующего законодательства.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Автор программы — %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Авторы программы — %s и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Авторы программы — %s, %s и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Авторы программы — %s, %s, %s\n"
+"и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Авторы программы — %s, %s, %s,\n"
+"%s и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Авторы программы — %s, %s, %s,\n"
+"%s, %s и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Авторы программы — %s, %s, %s,\n"
+"%s, %s, %s и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Авторы программы — %s, %s, %s,\n"
+"%s, %s, %s, %s\n"
+"и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Авторы программы — %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Авторы программы — %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s и другие.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "Об ошибках сообщайте по адресу: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Об ошибках в %s сообщайте по адресу %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Домашняя страница %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Справка по работе с программами GNU: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(стандартный ввод)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "неверный аргумент длины контекста"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "входные данные слишком велики, чтобы сосчитать"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: двоичный файл совпадает"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: предупреждение: каталоги зациклены"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: файл ввода также используется и для вывода"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Использование: %s [ПАРАМЕТР]… ШАБЛОНЫ [ФАЙЛ]…\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Запустите «%s --help» для получения более подробного описания.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Поиск ШАБЛОНОВ в каждом ФАЙЛЕ.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Пример: %s -i 'hello world' menu.h main.c\n"
+"ШАБЛОНОВ можно указать несколько, разделяя их символом новой строки.\n"
+"\n"
+"Шаблон выбора и его интерпретация:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp  ШАБЛОНЫ — расширенные регулярные выражения\n"
+"  -F, --fixed-regexp     ШАБЛОНЫ — строки\n"
+"  -G, --basic-regexp     ШАБЛОНЫ — простые регулярные выражения\n"
+"  -P, --perl-regexp      ШАБЛОНЫ — регулярные выражения языка Perl\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=ШАБЛОНЫ   использовать ШАБЛОНЫ для поиска\n"
+"  -f, --file=ФАЙЛ        брать ШАБЛОНЫ из ФАЙЛа\n"
+"  -i, --ignore-case      игнорировать различие регистра\n"
+"      --no-ignore-case   учитывать регистр (по умолчанию)\n"
+"  -w, --word-regexp      совпадение обязательно с целым словом\n"
+"  -x, --line-regexp      совпадение обязательно с целой строкой\n"
+"  -z, --null-data        строки разделяются байтом с нулевым значением, а "
+"не\n"
+"                         символом конца строки\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Разное:\n"
+"  -s, --no-messages         не показывать сообщения об ошибках\n"
+"  -v, --invert-match        выбирать не подходящие строки\n"
+"  -V, --version             показать информацию о версии и закончить работу\n"
+"      --help                показать эту справку и закончить работу\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Управление выводом:\n"
+"  -m, --max-count=ЧИСЛО     остановиться после указанного\n"
+"                            ЧИСЛА совпавших строк\n"
+"  -b, --byte-offset         печатать вместе с выходными строками смещение в\n"
+"                            байтах\n"
+"  -n, --line-number         печатать номер строки вместе с выходными "
+"строками\n"
+"      --line-buffered       сбрасывать буфер после каждой строки\n"
+"  -H, --with-filename       печатать имя файла для каждой выводимой строки\n"
+"  -h, --no-filename         не начинать вывод с имени файла\n"
+"      --label=МЕТКА         использовать МЕТКУ в качестве имени файла для\n"
+"                            стандартного ввода\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       показывать только совпавшие непустые части "
+"строк\n"
+"  -q, --quiet, --silent     подавлять весь обычный вывод\n"
+"      --binary-files=ТИП    считать, что двоичный файл имеет ТИП:\n"
+"                            «binary», «text» или «without-match».\n"
+"  -a, --text                тоже, что и --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        то же, что и --binary-files=without-match\n"
+"  -d, --directories=ДЕЙСТВ  как обрабатывать каталоги\n"
+"                            ДЕЙСТВИЕ может быть «read» (читать),\n"
+"                            «recurse» (рекурсивно) или «skip» (пропускать).\n"
+"  -D, --devices=ДЕЙСТВ      как обрабатывать устройства, FIFO и сокеты\n"
+"                            ДЕЙСТВИЕ может быть «read» или «skip»\n"
+"  -r, --recursive           то же, что и --directories=recurse\n"
+"  -R, --dereference-recursive                             тоже, но с "
+"переходом\n"
+"                            по всем символьным ссылкам\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=МАСКА       обработать только файлы, подпадающие под\n"
+"                            МАСКУ (файловый шаблон)\n"
+"      --exclude=МАСКА       пропустить файлы, подпадающие под МАСКУ\n"
+"      --exclude-from=ФАЙЛ   пропустить файлы, подпадающие под маску\n"
+"                            файлов из ФАЙЛА\n"
+"      --exclude-dir=МАСКА   пропустить каталоги, подпадающие под МАСКУ\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match печатать только имена ФАЙЛОВ без выбранных "
+"строк\n"
+"  -l, --files-with-matches  печатать только имена ФАЙЛОВ с выбранными "
+"строками\n"
+"  -c, --count               печатать только количество выбранных\n"
+"                            строк на ФАЙЛ\n"
+"  -T, --initial-tab         выравнивать табуляцией (если нужно)\n"
+"  -Z, --null                печатать байт 0 после имени ФАЙЛА\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Управление контекстом:\n"
+"  -B, --before-context=ЧИС  печатать ЧИСЛО строк предшествующего контекста\n"
+"  -A, --after-context=ЧИС   печатать ЧИСЛО строк последующего контекста\n"
+"  -C, --context[=ЧИС]       печатать ЧИСЛО строк контекста\n"
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -ЧИСЛО                    то же, что и --context=ЧИСЛО\n"
+"      --group-separator=SEP печатать SEP в строке между совпадениями\n"
+"                            с контекстом\n"
+"      --no-group-separator  не печатать разделитель между совпадениями\n"
+"                            с контекстом\n"
+"      --color[=КОГДА],\n"
+"      --colour[=КОГДА]      использовать маркеры для различия совпадающих\n"
+"                            строк; КОГДА может быть «always» (всегда),\n"
+"                            «never» (никогда) или «auto» (автоматически)\n"
+"  -U, --binary              не удалять символы CR в конце строки\n"
+"                            (MSDOS/Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Если в качестве ФАЙЛА указан символ «-», то читается стандартный ввод.\n"
+"Если ФАЙЛ не указан, то читается текущий каталог «.»  и «-» в противном\n"
+"случае. Если указано менее двух ФАЙЛОВ, то предполагается -h.\n"
+"При нахождении совпадений любой строки кодом завершения будет 0\n"
+"и 1, если ничего не совпало. При возникновении ошибок и если не указан\n"
+"параметр -q, кодом завершения будет 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "заданы конфликтующие образцы"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr "Шаблоны Perl не поддерживаются при сборке с --disable-perl-regexp"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "неверный образец %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "неизвестный метод для устройств"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr "предупреждение: параметр --unix-byte-offsets (-u) устарел"
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "неверно задано число максимального количества совпадений"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "неизвестный тип двоичных файлов"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Авторы программы: Mike Haertel и другие; смотрите\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>"
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "ошибка выделения памяти для стека PCRE JIT"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "параметр -P поддерживает только однобайтовые локали и UTF-8"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "параметр -P поддерживает только одиночный шаблон"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "внутренняя ошибка (не должна возникать)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "превышено ограничение длины строки PCRE"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: память исчерпана"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: исчерпан стек PCRE JIT"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: исчерпан лимит возвратов в PCRE"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: исчерпан лимит рекурсии в PCRE"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: внутренняя ошибка PCRE: %d"
+
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr ""
+#~ "предупреждение: GREP_OPTIONS устарел; используйте псевдоним или сценарий"
+
+#~ msgid "warning: %s: %s"
+#~ msgstr "предупреждение: %s: %s"
+
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "Домашняя страница %s: <https://www.gnu.org/software/%s/>\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "неверный аргумент %s%s в «%s»"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "недопустимый суффикс в аргументе %s%s для «%s»"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "аргумент %s%s слишком велик для «%s»"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Майк Гертель (Mike Haertel)"
+
+#~ msgid "internal error"
+#~ msgstr "внутренняя ошибка"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: у параметра «--%s» не может быть аргумента\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: неизвестный параметр «--%s»\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: двусмысленный параметр «-W %s»\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: у параметра «-W %s» не может быть аргумента\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: для параметра «-W %s» требуется аргумент\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "Вызов lseek завершился неудачно"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr ""
+#~ "По умолчанию, ШАБЛОН представляет собой простое регулярное выражение "
+#~ "(BRE).\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "Вместо «egrep» предполагается запуск «grep -E». Вместо «fgrep» "
+#~ "предполагается\n"
+#~ "«grep -F». Запуск под именами «egrep» или «fgrep» лучше не выполнять.\n"
+
+#~ msgid "unescaped ^ or $ not supported with -Pz"
+#~ msgstr "неэкранированный символ ^ или $ не поддерживается при указании -Pz"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "Домашняя страница GNU Grep: <%s>\n"
+
+#~ msgid "invalid UTF-8 byte sequence in input"
+#~ msgstr "недопустимая последовательность байтов UTF-8 во входных данных"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "ШАБЛОН представляет собой расширенное регулярное выражение (ERE).\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr ""
+#~ "Запуск под именем «egrep» устарел; вместо этого используйте «grep -E».\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr ""
+#~ "ШАБЛОН представляет строки фиксированной длины, разделённые символом "
+#~ "новой строки.\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr ""
+#~ "Запуск под именем «fgrep» устарел; вместо этого используйте «grep -F».\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "В %s можно использовать только шаблонный синтаксис %s"
+
+#~ msgid "the --mmap option has been a no-op since 2010"
+#~ msgstr ""
+#~ "начиная с 2010 года при указании параметра --mmap ничего не выполняется"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "незавершённое количество повторений"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "некорректно указано количество повторений"
+
+#~ msgid "writing output"
+#~ msgstr "запись выходных данных"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity needs a value (\"=...\"); "
+#~ "skipped"
+#~ msgstr ""
+#~ "в GREP_COLORS=\"%s\" для свойства «%s» требуется указать значение («=…»); "
+#~ "пропускается"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity is boolean and cannot take a "
+#~ "value (\"=%s\"); skipped"
+#~ msgstr ""
+#~ "в GREP_COLORS=\"%s\" свойство «%s» является логическим и не требует "
+#~ "значения («=%s»); пропускается"
+
+#~ msgid "in GREP_COLORS=\"%s\", the \"%s\" capacity %s"
+#~ msgstr "в GREP_COLORS=\"%s\" значение «%s» присвоено свойству %s"
+
+#~ msgid ""
+#~ "stopped processing of ill-formed GREP_COLORS=\"%s\" at remaining "
+#~ "substring \"%s\""
+#~ msgstr ""
+#~ "прекращение обработки неправильной GREP_COLORS=\"%s\", начиная с "
+#~ "оставшейся подстроки «%s»"
+
+#~ msgid "unknown directories method"
+#~ msgstr "неизвестный метод для каталогов"
diff --git a/src/grep/po/sk.gmo b/src/grep/po/sk.gmo
new file mode 100644
index 0000000..0f5814c
--- /dev/null
+++ b/src/grep/po/sk.gmo
diff --git a/src/grep/po/sk.po b/src/grep/po/sk.po
new file mode 100644
index 0000000..70445ee
--- /dev/null
+++ b/src/grep/po/sk.po
@@ -0,0 +1,944 @@
+# Translation of grep to Slovak 
+# Copyright (C) 1997-99, 2000, 2001, 2002 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Ivan Masár <helix84@centrum.sk>, 2007, 2008, 2009, 2010, 2011, 2012.
+# Ladislav Michnovič <ladislav.michnovic@gmail.com>, 2020, 2021.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 3.6.27\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-08-09 17:38+0200\n"
+"Last-Translator: Ladislav Michnovič <ladislav.michnovic@gmail.com>\n"
+"Language-Team: Slovak <sk-i18n@lists.linux.sk>\n"
+"Language: sk\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=utf-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"X-Generator: Poedit 2.4.1\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "neplatný argument %s pre %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "nejednoznačný argument %s pre %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Platné argumentu sú:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "chyba programu"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "pretečenie zásobníka"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "chyba zápisu"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "[ bez náprotivku"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "neplatná trieda znakov"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "syntax triedy znakov je [[:space:]], nie [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "nedokončená úniková klauzula \\"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "neplatný obsah \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "regulárny výraz je príliš veľký"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "( bez náprotivku"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "neuvedená syntax"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr ") bez náprotivku"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Neznáma systémová chyba"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: voľba „%s%s“ je nejednoznačná\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: voľba „%s%s“ je nejednoznačná; možnosti:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: nerozpoznaná voľba „%s%s“\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: voľba „%s%s“ nepripúšťa argument\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: voľba „%s%s“ vyžaduje argument\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: neplatná voľba -- %c\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: voľba vyžaduje argument -- %c\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "pamäť bola vyčerpaná"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "nepodarilo sa zaznamenať aktuálny adresár"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "zlyhalo navrátenie do pôvodného aktuálneho adresára"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "zlyhalo nastaviť deskriptor súboru do textového/binárneho módu"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "„"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "“"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Úspešne vykonané"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Nič nezodpovedá"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Neplatný regulárny výraz"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Neplatný radiaci znak"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Neplatný názov triedy znakov"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Spätná lomka na konci"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Neplatný spätný odkaz"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "[, [^, [:, [., alebo [= bez náprotivku"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "( alebo \\( bez náprotivku"
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "\\{ bez náprotivku"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Neplatný obsah \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Neplatný koniec rozsahu"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Pamäť bola vyčerpaná"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Neplatný predošlý regulárny výraz"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Neplatný koniec regulárneho výrazu"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Regulárny výraz je príliš veľký"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ") alebo \\) bez náprotivku."
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Žiadny predošlý regulárny výraz"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Balík vytvoril %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Balík vytvoril %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "(C)"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Licencia GPLv3+: GNU GPL verzie 3 alebo neskoršej <%s>\n"
+"Toto je slobodný softvér: môžete ho slobodne meniť a šíriť.\n"
+"Nie je poskytovaná ŽIADNA ZÁRUKA do miery akú povoľuje aplikovateľné právo.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Napísal %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Napísali %s a %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Napísali %s, %s a %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Napísali %s, %s, %s a\n"
+"%s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Napísali %s, %s, %s,\n"
+"%s a %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Napísali %s, %s, %s,\n"
+"%s, %s a %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Napísali %s, %s, %s,\n"
+"%s, %s, %s a %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Napísali %s, %s, %s,\n"
+"%s, %s, %s, %s a\n"
+"%s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Napísali %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s a %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Napísali %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s a iní.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "Chyby oznamujte na: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Chyby programu %s oznamujte na: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Domovská stránka %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Všeobecná pomoc pri používaní softvéru GNU: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(štandardný vstup)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "neplatný argument dĺžky kontextu"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "vstup je príliš veľký, aby sa dal spočítať"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: zhoda v binárnom súbore"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: upozornenie: rekurzívna adresárová slučka"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "vstupný súbor %s je tiež uvedený ako výstupný"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Použitie: %s [VOĽBA]... VZORY [SÚBOR]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Ďalšie informácie získate príkazom „%s --help“.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Hľadať VZORY v každom SÚBORE.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Príklad: %s -i 'hello world' menu.h main.c\n"
+"VZORY môžu obsahovať niekoľko vzorov oddelených odriadkovaním.\n"
+"\n"
+"Výber a interpretácia vzoru:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     VZOR je rozšírený regular expression (ERE)\n"
+"  -F, --fixed-strings       VZOR je množina pevných reťazcov\n"
+"  -G, --basic-regexp        VZOR je základný regulárny výraz (BRE)\n"
+"  -P, --perl-regexp         VZOR je perlovský regulárny výraz\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=VZOR       použiť na hľadanie zhody VZOR\n"
+"  -f, --file=SÚBOR          získať VZOR zo SÚBORu\n"
+"  -i, --ignore-case         ignorovať rozdiely vo veľkosti písmen\n"
+"      --no-ignore-case      neignorovať rozdiely vo veľkosti písmen "
+"(predvolené)\n"
+"  -w, --word-regexp         vynútiť, aby VZOR zodpovedal len celým slovám\n"
+"  -x, --line-regexp         vynútiť, aby VZOR zodpovedal len celým riadkom\n"
+"  -z, --null-data           údaje končia bajtom 0, nie novým riadkom\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Rozličné:\n"
+"  -s, --no-messages         potlačiť chybové správy\n"
+"  -v, --invert-match        vybrať riadky, ktoré nemajú zhodu\n"
+"  -V, --version             vypísať informácie o verzii a skončiť\n"
+"      --help                zobraziť tieto informácie a skončiť\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Riadenie výstupu:\n"
+"  -m, --max-count=POČ       zastaviť po POČ zhodách\n"
+"  -b, --byte-offset         vypísať pri výstupných riadkoch ofset v bajtoch\n"
+"  -n, --line-number         vypísať pri výstupných riadkoch číslo riadka\n"
+"      --line-buffered       vypisovať (flush) výstup po každom riadku\n"
+"  -H, --with-filename       vypísať názov súboru pri každej zhode\n"
+"  -h, --no-filename         potlačiť názov súboru ako predponu vo výstupe\n"
+"      --label=NÁVESTIE      použiť NÁVESTIE ako predponu názvu súboru pre "
+"štand. vstup\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       zobrazovať iba neprázdne časti riadkov, ktoré "
+"zodpovedajú\n"
+"  -q, --quiet, --silent     potlačiť všetok bežný výstup\n"
+"      --binary-files=TYP    predpokladať, že typ binárnych súborov je TYP;\n"
+"                            TYP zvoľte „binary“, „text“ alebo „without-"
+"match“\n"
+"  -a, --text                ekvivalentné s --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        ekvivalentné s --binary-files=without-match\n"
+"  -d, --directories=OPERÁCIA ako pracovať s adresármi; kde OPERÁCIA je\n"
+"                            „read“ (čítať), „recurse“ (prechádzať) alebo\n"
+"                            „skip“ (preskočiť)\n"
+"  -D, --devices=OPERÁCIA    ako pracovať so zariadeniami, FIFO a socketmi;\n"
+"                            OPERÁCIA je „read“ (čítať) alebo "
+"„skip“ (preskočiť)\n"
+"  -r, --recursive           ekvivalentné s --directories=recurse\n"
+"  -R, --dereference-recursive  podobné, ale nasleduje symbolické odkazy\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=VZOR_SÚBORU   hľadať iba v súboroch zodpovedajúcich "
+"VZOR_SÚBORU\n"
+"      --exclude=VZOR_SÚBORU   preskočiť súbory a adresáre zodpovedajúce "
+"VZOR_SÚBORU\n"
+"      --exclude-from=SÚBOR    preskočiť súbory zodpovedajúce akémukoľvek "
+"vzoru súboru zo SÚBOR\n"
+"      --exclude-dir=VZOR      preskočiť adresáre, ktoré zodpovedajú VZORu\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match  vypísať iba názvy SÚBORov neobsahujúce zhodu\n"
+"  -l, --files-with-matches  vypísať iba názvy SÚBORov obsahujúce zhodu\n"
+"  -c, --count               vypísať iba počet riadkov obsahujúcich zhodu v "
+"SÚBORe\n"
+"  -T, --initial-tab         zarovnávať tabulátory (ak je to potrebné)\n"
+"  -Z, --null                vypísať za názvom SÚBORu bajt 0\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Riadenie kontextu:\n"
+"  -B, --before-context=POČ  vytlačiť POČ riadkov kontextu pred\n"
+"  -A, --after-context=POČ   vytlačiť POČ riadkov kontextu za\n"
+"  -C, --context=POČ         vytlačiť POČ riadkov kontextu výstupu\n"
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NUM                  rovnaké ako --context=NUM\n"
+"      --group-separator=SEP  vypíš oddeľovač SEP na riadok medzi zhodami s "
+"kontextom\n"
+"      --no-group-separator  nevypisuj oddeľovač pre zhody s kontextom\n"
+"      --color[=KEDY],\n"
+"      --colour[=KEDY]    použiť zvýrazňovanie zodpovedajúcich reťazcov;\n"
+"                        KEDY zvoľte „always“, „never“ alebo „auto“\n"
+"  -U, --binary      neodstraňovať znak CR na konci riadka (MSDOS/Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Ak SÚBOR je -, číta sa zo štandardného vstupu. Bez SÚBORU číta sa . ak \n"
+"je rekurzia, v opačnom prípade -. Ak sú zadané menej ako dva SÚBORY "
+"predpokladá sa -h.\n"
+"Výstupný chybový kód je 0 ak bol vybraný nejaký riadok,inak je 1;\n"
+"ak sa vyskytne nejaká chyba a nebolo zadané -q, výstupný chybový kód je 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "boli zadané konfliktné špecifikátory"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"Podpora Perlu nebola zakompilovaná do tejto binárky s --disable-perl-regexp"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "neplatný zástupný znak %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "neznáme metódy zariadení"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr "Upozornenie: --unix-byte-offsets (-u) sa už nepoužíva"
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "neplatný maximálny počet"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "neznámy typ binárneho súboru"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Napísal Mike Haertel iní; pozri\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "chyba pri alokácii pamäte pre zásobník PCRE JIT"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P podporuje iba unibyte a UTF-8 locales"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "voľba -P podporuje iba jediný vzor"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "vnutorná chyba (nemalo by nikdy nastať)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "prekročený limit dĺžky riadka PCRE"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: pamäť bola vyčerpaná"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: vyčerpaný zásobník PCRE JIT"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: prekročený limit backtrackingu PCRE"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: prekročený limit rekurzie PCRE"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: vnútorná chyba PCRE: %d"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: voľba „--%s“ nepripúšťa argument\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: nerozpoznaná voľba „--%s“\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: voľba „-W %s“ nepripúšťa argument\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: voľba „-W %s“ vyžaduje argument\n"
+
+#~ msgid "%s home page: <http://www.gnu.org/software/%s/>\n"
+#~ msgstr "Domovská stránka %s: <http://www.gnu.org/software/%s/>\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "neplatný argument %s%s „%s“"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "neplatná prípona v argumente %s%s „%s“"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "argument %s%s „%s“ je príliš veľký"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "VZORKA je rozšírený regulárny výraz (ERE).\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr ""
+#~ "Vyvolanie príkazu ako „egrep“ sa neodporúča; použite namiesto toho „grep -"
+#~ "E“.\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr ""
+#~ "VZORKA je množina pevných reťazcov oddelených znakom nového riadka.\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr ""
+#~ "Vyvolanie príkazu ako „fgrep“ sa neodporúča; použite namiesto toho „grep -"
+#~ "F“.\n"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "VZORKA je štandardne základný regulárny výraz (BRE).\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "„egrep“ znamená „grep -E“. „fgrep“ znamená „grep -F“.\n"
+#~ "Priame vyvolanie príkazu ako „egrep“ či „fgrep“ sa neodporúča.\n"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "lseek failed"
+#~ msgstr "nepodarilo sa vykonať lseek()"
+
+#~ msgid "warning: %s: %s"
+#~ msgstr "upozornenie: %s: %s"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "Domovská stránka GNU Grep: <%s>\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s môže používať iba syntax vzorky %s"
+
+#~ msgid "the --mmap option has been a no-op since 2010"
+#~ msgstr "voľba --mmap nič nerobí od roku 2010"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "Nedokončený počet opakovaní"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "Zle formulovaný počet opakovaní"
+
+#~ msgid "writing output"
+#~ msgstr "zapisuje sa výstup"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity needs a value (\"=...\"); "
+#~ "skipped"
+#~ msgstr ""
+#~ "V GREP_COLORS=\"%s\", potrebuje kapacita \"%s\" hodnotu (\"=...\"); "
+#~ "preskočené"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity is boolean and cannot take a "
+#~ "value (\"=%s\"); skipped"
+#~ msgstr ""
+#~ "V GREP_COLORS=\"%s\", je kapacita \"%s\" booleovského typu a nemôže "
+#~ "nadobúdať hodnotu (\"=%s\"); preskočené"
+
+#~ msgid "in GREP_COLORS=\"%s\", the \"%s\" capacity %s"
+#~ msgstr "V GREP_COLORS=\"%s\", kapacita \"%s\" %s."
+
+#~ msgid ""
+#~ "stopped processing of ill-formed GREP_COLORS=\"%s\" at remaining "
+#~ "substring \"%s\""
+#~ msgstr ""
+#~ "zastavené spracovanie zle utvoreného GREP_COLORS=\"%s\" na zvyšnom "
+#~ "podreťazci \"%s\"."
+
+#~ msgid "unknown directories method"
+#~ msgstr "neznáme metódy adresárov"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE;\n"
+#~ "                            TYPE is `binary', `text', or `without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories;\n"
+#~ "                            ACTION is `read', `recurse', or `skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+#~ "                            ACTION is `read' or `skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=FILE_PATTERN  search only files that match FILE_PATTERN\n"
+#~ "      --exclude=FILE_PATTERN  skip files and directories matching "
+#~ "FILE_PATTERN\n"
+#~ "      --exclude-from=FILE   skip files matching any file pattern from "
+#~ "FILE\n"
+#~ "      --exclude-dir=PATTERN directories that match PATTERN will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match print only names of FILEs containing no "
+#~ "match\n"
+#~ "  -l, --files-with-matches  print only names of FILEs containing matches\n"
+#~ "  -c, --count               print only a count of matching lines per "
+#~ "FILE\n"
+#~ "  -T, --initial-tab         make tabs line up (if needed)\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Riadenie výstupu:\n"
+#~ "  -m, --max-count=POČET     zastaviť po POČET zhodách\n"
+#~ "  -b, --byte-offset         vypísať ofset v bajtoch pri riadkoch výstupu\n"
+#~ "  -n, --line-number         vypísať číslo riadka pri riadkoch výstupu\n"
+#~ "      --line-buffered       flush výstupu po každom riadku\n"
+#~ "  -H, --with-filename       vypísať názov súboru pri každej zhode\n"
+#~ "  -h, --no-filename         potlačiť prefix názvu súboru na výstupe\n"
+#~ "      --label=ŠTÍTOK        vypísať ŠTÍTOK ako názov súboru pre štandard. "
+#~ "vstup\n"
+#~ "  -o, --only-matching       zobraziť iba časť riadka zodpovedajúcu "
+#~ "VZORKE\n"
+#~ "  -q, --quiet, --silent     potlačiť všetok normálny výstup\n"
+#~ "      --binary-files=TYP    predpokladať, že binárne súbory sú zadaného "
+#~ "TYPu;\n"
+#~ "                            TYP je „binary“, „text“ alebo „without-"
+#~ "match“\n"
+#~ "  -a, --text                ekvivalentné s --binary-files=text\n"
+#~ "  -I                        ekvivalentné s --binary-files=without-match\n"
+#~ "  -d, --directories=AKCIA   ako zaobchádzať s adresármi;\n"
+#~ "                            AKCIA je „read“, „recurse“ alebo „skip“\n"
+#~ "  -D, --devices=AKCIA       ako zaobchádzať so zariadeniami, FIFO a "
+#~ "socketmi;\n"
+#~ "                            AKCIA je „read“ alebo „skip“\n"
+#~ "  -R, -r, --recursive       ekvivalentné s --directories=recurse\n"
+#~ "      --include=SÚBOR_VZORKA  hľadať iba v súboroch zodpoved. "
+#~ "SÚBOR_VZORKA\n"
+#~ "      --exclude=SÚBOR_VZORKA  preskočiť súbory a adresáre zodp. "
+#~ "SÚBOR_VZORKA\n"
+#~ "      --exclude-from=SÚBOR  preskočiť súbory zodp. akejkoľvek vzorke zo "
+#~ "SÚBORU\n"
+#~ "      --exclude-dir=VZORKA  preskočiť adresáre zodpovedajúce VZORKE.\n"
+#~ "  -L, --files-without-match vypísať iba názvy SÚBOROV, ktoré neobsahujú "
+#~ "zhodu\n"
+#~ "  -l, --files-with-matches  vypísať iba názvy SÚBOROV, ktoré obsahujú "
+#~ "zhodu\n"
+#~ "  -c, --count               vypísať iba počet zodpovedajúcich riadkov na "
+#~ "SÚBOR\n"
+#~ "  -T, --initial-tab         zarovnať tabulátory (ak je potrebné)\n"
+#~ "  -Z, --null                vytlačiť bajt 0 po SÚBORE\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "Voľby -P a -z nie je možné kombinovať"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: neprípustná voľba -- %c\n"
+
+#~ msgid "Copyright (C) 2008 Free Software Foundation, Inc.\n"
+#~ msgstr "Copyright (C) 2008 Free Software Foundation, Inc.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions.  There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "Tento program je slobodný softvér; podmienky šírenia si pozrite v "
+#~ "zdrojových\n"
+#~ "súboroch. Nie je poskytovaná ŽIADNA záruka; ani záruka PREDAJNOSTI či\n"
+#~ "VHODNOSTI NA DANÝ ÚČEL.\n"
diff --git a/src/grep/po/sl.gmo b/src/grep/po/sl.gmo
new file mode 100644
index 0000000..91323ce
--- /dev/null
+++ b/src/grep/po/sl.gmo
diff --git a/src/grep/po/sl.po b/src/grep/po/sl.po
new file mode 100644
index 0000000..abd9423
--- /dev/null
+++ b/src/grep/po/sl.po
@@ -0,0 +1,1014 @@
+# -*- mode: po; coding: utf-8; -*- Slovenian message catalogue for grep
+# Copyright (C) 1996, 1999, 2000, 2007, 2008, 2009, 2011, 2012, 2013, 2014, 2015, 2017 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Primož Peterlin <primozz.peterlin@gmail.com>, 1996, 1999, 2000, 2007, 2008, 2009, 2011, 2012, 2013, 2014, 2015, 2018.
+#
+# $Id: grep-3.0.23-b00.sl.po,v 1.2 2018/07/28 21:40:33 peterlin Exp $
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: GNU grep 3.0.23-b00\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2018-07-28 23:40+0200\n"
+"Last-Translator: Primož Peterlin <primozz.peterlin@gmail.com>\n"
+"Language-Team: Slovenian <translation-team-sl@lists.sourceforge.net>\n"
+"Language: sl\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8-bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"Plural-Forms: nplurals=4; plural=(n%100==1 ? 1 : n%100==2 ? 2 : n%100==3 || n"
+"%100==4 ? 3 : 0);\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "neveljavni argument %s za %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "dvoumni argument %s za %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Veljavni argumenti so:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr ""
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr ""
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "napaka pri pisanju"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "uklepaj [ brez zaklepaja"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "neveljavno ime razreda znakov"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "skladnja imena razreda znakov je [[:space:]], ne [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "nedokončano ubežno zaporedje \\"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "neveljavna vsebina \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "regularni izraz je preobsežen"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "uklepaj ( brez zaklepaja"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "skladnja ni podana"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "zaklepaj ) brez uklepaja"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Neznana sistemska napaka"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: izbira »%s%s« ni enopomenska\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: izbira »%s%s« ni enopomenska; možnosti:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: neprepoznana izbira »%s%s«\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: izbira »%s%s« ne dovoljuje argumenta\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: izbira »%s%s« zahteva argument\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: neveljavna izbira -- »%c«\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: izbira zahteva argument -- »%c«\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "pomnilnik porabljen"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "trenutnega delovnega imenika ni mogoče zabeležiti"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "vrnitev v začetni delovni imenik ni mogoča"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "nastavitev deskriptorja datoteke za tekstovni/binarni način ni uspela"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "»"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "«"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Uspešno"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Brez zadetkov"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Neveljaven regularen izraz"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Neveljaven razvrščevalni znak"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Neveljavno ime razreda znakov"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Zaključna obratna poševnica"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Neveljaven povratni sklic"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Uklepaj [, [^, [:, [. ali [= brez para"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "Uklepaj ( ali \\( brez para"
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "Uklepaj \\{ brez para"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Neveljavna vsebina \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Neveljaven konec razpona"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Pomnilnik porabljen"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Neveljaven predhodni regularni izraz"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Predčasen zaključek regularnega izraza"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Regularni izraz je preobsežen"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "Zaklepaj ) ali \\\\) brez para"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Manjkajoč prejšnji regularni izraz"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Priprava paketa: %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Priprava paketa: %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, fuzzy, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"\n"
+"GPLv3+: GNU GPL, 3. izdaja ali poznejša <http://www.gnu.org/licenses/gpl."
+"html>\n"
+"To je prosto programje; lahko ga redistribuirate in/ali spreminjate.\n"
+"Za izdelek ni NOBENEGA JAMSTVA, do z zakonom dovoljene meje.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Avtor(ica): %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Avtorja: %s in %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Avtorji: %s, %s in %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Avtorji: %s, %s, %s\n"
+"in %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Avtorji: %s, %s, %s,\n"
+"%s in %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Avtorji: %s, %s, %s,\n"
+"%s, %s in %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Avtorji: %s, %s, %s,\n"
+"%s, %s, %s in %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Avtorji: %s, %s, %s,\n"
+"%s, %s, %s, %s\n"
+"in %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Avtorji: %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s in %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Avtorji: %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s in drugi.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, fuzzy, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"\n"
+"Poročila o napakah: %s\n"
+"Napake v prevodu sporočite na <translation-team-sl@lists.sourceforge.net>.\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr ""
+"Napake v programu %s sporočite na %s.\n"
+"Napake v prevodu sporočite na <translation-team-sl@lists.sourceforge.net>.\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Spletna stran %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, fuzzy, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Splošna pomoč za rabo programja GNU: <http://www.gnu.org/gethelp/>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(standardni vhod)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "velikost konteksta ni veljavna"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "vhod je prevelik, da bi ga mogli prešteti"
+
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "Binarna datoteka %s ustreza\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "rekurzivna zanka imenikov"
+
+#: src/grep.c:1899
+#, fuzzy, c-format
+msgid "%s: input file is also the output"
+msgstr "vhodna datoteka %s je tudi izhodna"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, fuzzy, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Uporaba: %s [IZBIRA]... VZOREC [DATOTEKA]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Poskusite  »%s --help« za dodatna pojasnila.\n"
+
+#: src/grep.c:1969
+#, fuzzy, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "V vsaki DATOTEKI se išče VZOREC.\n"
+
+#: src/grep.c:1970
+#, fuzzy, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Zgled: %s -i 'hello world' menu.h main.c\n"
+"\n"
+"Izbira in tolmačenje vzorcev:\n"
+
+#: src/grep.c:1975
+#, fuzzy, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     VZOREC je razširjeni regularni izraz\n"
+"  -F, --fixed-strings       VZOREC je množica nizov, vsak v svoji vrstici\n"
+"  -G, --basic-regexp        VZOREC je osnovni regularni izraz (privzeto)\n"
+"  -P, --perl-regexp         VZOREC je regularni izraz z razširitvami perla\n"
+
+#: src/grep.c:1981
+#, fuzzy, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=VZOREC       uporabi VZOREC kot regularni izraz\n"
+"  -f, --file=DATOTEKA       preberi VZOREC iz podane DATOTEKE\n"
+"  -i, --ignore-case         velike in male črke obravnavaj enako\n"
+"  -w, --word-regexp         iskanje uspešno le, če je VZOREC cela beseda\n"
+"  -x, --line-regexp         iskanje uspešno le, če je VZOREC cela vrstica\n"
+"  -z, --null-data           vrstica podatkov je končana z znakom NUL, ne z\n"
+"                            znakom za skok v novo vrstico\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Razno:\n"
+"  -s, --no-messages         brez sporočil o napakah\n"
+"  -v, --invert-match        izberi vrstice, ki se ne ujemajo\n"
+"  -V, --version             verzija programa\n"
+"      --help                ta pomoč\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Nadzor izhoda:\n"
+"  -m, --max-count=ŠTEVILO   odnehaj po danem ŠTEVILU izbranih vrstic\n"
+"  -b, --byte-offset         z izpisom odmika (v zlogih)\n"
+"  -n, --line-number         z izpisom zaporedne številke vrstice\n"
+"      --line-buffered       izhodni medpomnilnik izpraznimo vsako vrstico\n"
+"  -H, --with-filename       z izpisom imena datoteke\n"
+"  -h, --no-filename         brez izpisa imena datoteke\n"
+"      --label=OZNAKA        z navedeno OZNAKO, kadar beremo s standardnega "
+"vhoda\n"
+
+#: src/grep.c:2007
+#, fuzzy, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       izpis samo dela vrstice z VZORCEM\n"
+"  -q, --quiet, --silent     brez vsega običajnega izpisa\n"
+"      --binary-type=TIP     privzemi izbrani TIP binarne datoteke\n"
+"                            TIP je lahko »binary«, »text« ali »without-"
+"match«\n"
+"  -a, --text                isto kot --binary-type=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        isto kot --binary-type=without-match\n"
+"  -d, --directories=DEJANJE  kako obravnavamo imenike\n"
+"                            DEJANJE je lahko »read«, »recurse« ali »skip«\n"
+"  -D, --devices=DEJANJE     kako obravnavamo datoteke naprav\n"
+"                            DEJANJE je lahko »read« ali »skip«\n"
+"  -r, --recursive           podobno kot --directories=recurse\n"
+"  -R, --dereference-recursive  podobno, vendar s sledenjem vseh simbolnih \n"
+"                               povezav\n"
+
+#: src/grep.c:2023
+#, fuzzy, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=VZOREC      preišči le datoteke, ki ustrezajo VZORCU\n"
+"      --exclude=VZOREC      izpusti datoteke, ki ustrezajo VZORCU\n"
+"      --exclude-from=DATOTEKA  izpusti datoteke, ki ustrezajo vzorcu v "
+"DATOTEKI\n"
+"      --exclude-dir=VZOREC  izpusti imenike, ki ustrezajo VZORCU\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match le imena DATOTEK brez izbranih vrstic\n"
+"  -l, --files-with-matches  le imena DATOTEK z izbranimi vrsticami\n"
+"  -c, --count               le skupno število izbranih vrstic v DATOTEKI\n"
+"  -T, --initial-tab         dodaj začetni tabulator (če je potrebno)\n"
+"  -Z, --null                izpiši znak NUL za imenom DATOTEKE\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Nadzor nad kontekstom:\n"
+"  -B, --before-context=ŠT   ŠT vrstic konteksta pred vrstico z VZORCEM\n"
+"  -A, --after-context=ŠT    ŠT vrstic konteksta za vrstico z VZORCEM\n"
+"  -C, --context=ŠT          ŠT vrstic konteksta pred in za vrstico z "
+"VZORCEM\n"
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -ŠT                       isto kot --context=ŠT\n"
+"      --color[=KDAJ],\n"
+"      --colour[=KDAJ]       ujemajoče nize barvno označimo; KDAJ je lahko\n"
+"                            »always«, »never« ali »auto«\n"
+"  -U, --binary              ne porežemo znakov CR na koncu vrstic \n"
+"                            (MS-DOS/Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, fuzzy, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Če je podana DATOTEKA enaka »-«, se bere s standardnega vhoda. Če\n"
+"DATOTEKA ni podana, se bere ».«, kadar je podana izbira »--recursive«,\n"
+"sicer »-«. Če sta podani manj kot dve DATOTEKI, se privzame izbira »-h«.\n"
+"Izhodna koda je 0 ob vsaj eni izbrani vrstici, sicer pa 1; če je\n"
+"prišlo do napake in ni bila podana izbira -q, program vrne kodo 2.\n"
+
+#  Sporočilo se pojavi pri nedokumentirani izbiri -X
+#  grep.c:622 ->
+#  opt = getopt(argc, argv, "0123456789A:B:CEFGVX:bce:f:hiLlnqsvwxy"
+#  grep --help ->
+#  usage: grep [-[[AB] ]<num>] [-[CEFGVchilnqsvwx]] [-[ef]] <expr> [<files...>]
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "podana navodila si nasprotujejo"
+
+#: src/grep.c:2101
+#, fuzzy
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"podpora za izbiro -P ni bila vključena v ta prevedeni program (--disable-"
+"perl-regexp)"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "neveljaven ujemalnik %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "neznana metoda datotek naprav"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "neveljavno največje število"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "neznan tip binarne datoteke"
+
+#: src/grep.c:2829
+#, fuzzy
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr "drugi, glejte <http://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>"
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "pomnilnika za sklad PCRE JIT se ni uspelo dodeliti"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P podpira samo enobajtna kodiranja in UTF-8"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "izbira -P podpira le en vzorec"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "interna napaka (to tega ne bi smelo priti)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "prekoračena meja PCRE za dolžino vrstice"
+
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "pomnilnik porabljen"
+
+#: src/pcresearch.c:310
+#, fuzzy, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "prekoračitev sklada PCRE JIT"
+
+#: src/pcresearch.c:315
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "prekoračena meja PCRE za iskanje s povratnim sledenjem"
+
+#: src/pcresearch.c:319
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "prekoračena meja PCRE za iskanje s povratnim sledenjem"
+
+#: src/pcresearch.c:327
+#, fuzzy, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "interna napaka PCRE: %d"
+
+#, c-format
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr ""
+#~ "opozorilo: uporabo GREP_OPTIONS odsvetujemo; uporabite alias ali skript"
+
+#, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "opozorilo: %s: %s"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "neveljavni %s%s argument '%s'"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "neveljavna pripona pri %s%s argumentu '%s'"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "%s%s: argument '%s' je prevelik"
+
+#, fuzzy
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "Spletna stran %s: <http://www.gnu.org/software/%s/>\n"
+
+#~ msgid "internal error"
+#~ msgstr "interna napaka"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: izbira »--%s« ne dovoljuje argumenta\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: neprepoznana izbira »--%s«\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: izbira »-W %s« ni enopomenska\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: izbira »-W %s« ne dovoljuje argumenta\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: izbira »-W %s« zahteva argument\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "klic lseek ni uspel"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "VZOREC je privzeto osnovni regularni izraz (ORI).\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "Ukaz »egrep« pomeni isto kot »grep -E«, »fgrep« pa isto kot  »grep -F«.\n"
+#~ "Neposredna raba ukazov »egrep« ali »fgrep« je odsvetovana.\n"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "Spletna stran GNU Grep: <%s>\n"
+
+#~ msgid "invalid UTF-8 byte sequence in input"
+#~ msgstr "neveljavno zaporedje bajtov UTF-8 na vhodu"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "VZOREC je razširjeni regularni izraz (RRI).\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr ""
+#~ "Raba ukaza »egrep« je odsvetovana; namesto njega uporabite »grep -E«.\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr "VZOREC je množica nespremenljivih nizov, po eden v vrstici.\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr ""
+#~ "Raba ukaza »fgrep« je odsvetovana; namesto njega uporabite »grep -F«.\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s lahko uporablja le skladnjo vzorcev %s"
+
+#~ msgid "the --mmap option has been a no-op since 2010"
+#~ msgstr "izbira --mmap je neaktivna od leta 2010 "
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "nedokončano število ponovitev"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "slabo določeno število ponovitev"
+
+#~ msgid "writing output"
+#~ msgstr "pisanje rezultatov"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity needs a value (\"=...\"); "
+#~ "skipped"
+#~ msgstr ""
+#~ "v GREP_COLORS=\"%s\" mora \"%s\" vsebovati vrednost (\"=...\"); "
+#~ "ignorirano."
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity is boolean and cannot take a "
+#~ "value (\"=%s\"); skipped"
+#~ msgstr ""
+#~ "v GREP_COLORS=\"%s\" je \"%s\" Boolova spremenljivka in ji ne moremo "
+#~ "določiti vrednosti (\"=%s\"); ignorirano"
+
+#~ msgid "in GREP_COLORS=\"%s\", the \"%s\" capacity %s"
+#~ msgstr "v GREP_COLORS=\"%s\", \"%s\" vsebuje %s."
+
+#~ msgid ""
+#~ "stopped processing of ill-formed GREP_COLORS=\"%s\" at remaining "
+#~ "substring \"%s\""
+#~ msgstr ""
+#~ "prekinjena obdelava slabo formuliranega določila GREP_COLORS=\"%s\" pri "
+#~ "preostalem podnizu \"%s\"."
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE;\n"
+#~ "                            TYPE is `binary', `text', or `without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories;\n"
+#~ "                            ACTION is `read', `recurse', or `skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+#~ "                            ACTION is `read' or `skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=FILE_PATTERN  search only files that match FILE_PATTERN\n"
+#~ "      --exclude=FILE_PATTERN  skip files and directories matching "
+#~ "FILE_PATTERN\n"
+#~ "      --exclude-from=FILE   skip files matching any file pattern from "
+#~ "FILE\n"
+#~ "      --exclude-dir=PATTERN directories that match PATTERN will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match print only names of FILEs containing no "
+#~ "match\n"
+#~ "  -l, --files-with-matches  print only names of FILEs containing matches\n"
+#~ "  -c, --count               print only a count of matching lines per "
+#~ "FILE\n"
+#~ "  -T, --initial-tab         make tabs line up (if needed)\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Nadzor izhoda:\n"
+#~ "  -m, --max-count=ŠTEVILO   odnehamo, ko je doseženo ŠTEVILO ujemanj\n"
+#~ "  -b, --byte-offset         z izpisom odmika (v zlogih)\n"
+#~ "  -n, --line-number         z izpisom zaporedne številke vrstice\n"
+#~ "      --line-buffered       izhodni medpomnilnik izpraznimo vsako "
+#~ "vrstico\n"
+#~ "  -H, --with-filename       z izpisom imena datoteke\n"
+#~ "  -h, --no-filename         brez izpisa imena datoteke\n"
+#~ "      --label=OZNAKA        z navedeno OZNAKO, kadar beremo s "
+#~ "standardnega vhoda\n"
+#~ "  -o, --only-matching       izpis samo dela vrstice z VZORCEM\n"
+#~ "  -q, --quiet, --silent     brez vsega običajnega izpisa\n"
+#~ "      --binary-type=TIP     privzemi izbrani TIP binarne datoteke\n"
+#~ "                            TIP je lahko ,binary`, ,text` ali ,without-"
+#~ "match`\n"
+#~ "  -a, --text                isto kot --binary-type=text\n"
+#~ "  -I                        isto kot --binary-type=without-match\n"
+#~ "  -d, --directories=DEJANJE  kako obravnavamo imenike\n"
+#~ "                            DEJANJE je lahko ,read`, ,recurse` ali ,"
+#~ "skip`\n"
+#~ "  -D, --devices=DEJANJE     kako obravnavamo datoteke naprav\n"
+#~ "                            DEJANJE je lahko ,read` ali ,skip`\n"
+#~ "  -R, -r, --recursive       isto kot --directories=recurse\n"
+#~ "      --include=VZOREC      preiščemo le datoteke, ki ustrezajo VZORCU\n"
+#~ "      --exclude=VZOREC      izpustimo datoteke, ki ustrezajo VZORCU\n"
+#~ "      --exclude-from=DATOTEKA  izpustimo datoteke, ki ustrezajo vzorcu v "
+#~ "DATOTEKI\n"
+#~ "      --exclude-dir=VZOREC  izpustimo imenike, ki ustrezajo VZORCU\n"
+#~ "  -L, --files-without-match le imena tistih DATOTEK, kjer VZORCA nismo "
+#~ "našli\n"
+#~ "  -l, --files-with-matches  le imena tistih DATOTEK, kjer smo VZOREC "
+#~ "našli\n"
+#~ "  -c, --count               le skupno število vrstic v DATOTEKI, v "
+#~ "katerih se\n"
+#~ "                            pojavi VZOREC\n"
+#~ "  -T, --initial-tab         dodaj začetni tabulator (če je potrebno)\n"
+#~ "  -Z, --null                izpiši znak NUL za imenom DATOTEKE\n"
+
+#~ msgid "unknown directories method"
+#~ msgstr "neznana metoda imenikov"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "Izbiri -P in -z se med seboj izključujeta"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: nedovoljena izbira -- %c\n"
+
+#~ msgid "Copyright (C) 2008 Free Software Foundation, Inc.\n"
+#~ msgstr "Copyright (C) 2008 Free Software Foundation, Inc.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions.  There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "To je prost program; pogoji, pod katerimi ga lahko uporabljate, "
+#~ "razmnožujete\n"
+#~ "in razširjate so navedeni v izvorni kodi. Za program ni NOBENEGA "
+#~ "jamstva,\n"
+#~ "niti jamstev USTREZNOSTI ZA PRODAJO ali PRIMERNOSTI ZA UPORABO.\n"
+
+#~ msgid "out of memory"
+#~ msgstr "zmanjkalo pomnilnika"
+
+#~ msgid "Usage: %s [OPTION]... PATTERN [FILE] ...\n"
+#~ msgstr "Uporaba: %s [IZBIRA]... VZOREC [DATOTEKA] ...\n"
+
+#~ msgid "%s (GNU grep) %s\n"
+#~ msgstr "%s (GNU grep) %s\n"
+
+#~ msgid "option %s"
+#~ msgstr "izbira %s"
+
+#~ msgid " with arg %s"
+#~ msgstr " z argumentom %s"
+
+#~ msgid "digits occur in two different argv-elements.\n"
+#~ msgstr "števke nastopajo pri dveh elementih ARGV.\n"
+
+#~ msgid "option %c\n"
+#~ msgstr "izbira %c\n"
+
+#~ msgid "option a\n"
+#~ msgstr "izbira a\n"
+
+#~ msgid "option b\n"
+#~ msgstr "izbira b\n"
+
+#~ msgid "option c with value `%s'\n"
+#~ msgstr "izbira c z vrednostjo ,%s`\n"
+
+#~ msgid "option d with value `%s'\n"
+#~ msgstr "izbira d z vrednostjo ,%s`\n"
+
+#~ msgid "?? getopt returned character code 0%o ??\n"
+#~ msgstr "?? funkcija getopt vrnila kodo znaka 0%o ??\n"
+
+#~ msgid "non-option ARGV-elements: "
+#~ msgstr "neizbirni elementi ARGV: "
+
+#~ msgid "memory exhausted\n"
+#~ msgstr "pomnilnik porabljen\n"
+
+#~ msgid "you may specify only one of -E, -F, or -G"
+#~ msgstr "izberete lahko samo eno od izbir: -E, -F ali -G"
+
+#~ msgid "GNU grep version 2.0"
+#~ msgstr "GNU grep verzija 2.0"
+
+#~ msgid "(standard input)\n"
+#~ msgstr "(standardni vhod)\n"
diff --git a/src/grep/po/sr.gmo b/src/grep/po/sr.gmo
new file mode 100644
index 0000000..ff696ad
--- /dev/null
+++ b/src/grep/po/sr.gmo
diff --git a/src/grep/po/sr.po b/src/grep/po/sr.po
new file mode 100644
index 0000000..43326f3
--- /dev/null
+++ b/src/grep/po/sr.po
@@ -0,0 +1,825 @@
+# Serbian translation of grep
+# Copyright © 2020 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Danilo Segan <dsegan@gmx.net>, 2003.
+# Мирослав Николић <miroslavnikolic@rocketmail.com>, 2011—2020.
+msgid ""
+msgstr ""
+"Project-Id-Version: grep-3.5.16\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2020-11-05 13:11+0200\n"
+"Last-Translator: Мирослав Николић <miroslavnikolic@rocketmail.com>\n"
+"Language-Team: Serbian <(nothing)>\n"
+"Language: sr\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && n"
+"%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2);\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "неисправан аргумент „%s“ за „%s“"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "нејасан аргумент „%s“ за „%s“"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Исправни аргументи су:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "грешка програма"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "прекорачење спремника"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "грешка писања"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "неуравнотежена ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "неисправна класа знака"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "синтакса класе знака је [[:размак:]], а не [:размак:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "недовршена \\ излазим"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "неисправан садржај \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "регуларни израз је превелик"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "неуравнотежена ("
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "синтакса није наведена"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "неуравнотежена )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Непозната системска грешка"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: опција „%s%s“ је нејасна\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: опција „%s%s“ је нејасна; могућности:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: непрепознатљива опција „%s%s“\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: опција „%s%s“ не дозвољава аргумент\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: опција „%s%s“ захтева аргумент\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: неисправна опција —— „%c“\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: опција захтева аргумент —— „%c“\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "меморија је потрошена"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "не могу да снимим тренутни радни директоријум"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "не могу да се вратим у почетни радни директоријум"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "нисам успео да подесим текстуални/бинарни режим описника датотеке"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "„"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "“"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Успешно"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Нема подударања"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Неисправан регуларан израз"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Неисправан знак поретка"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Неисправан назив класе знака"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Водећа контра коса црта"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Неисправна повратна референца"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Не одговара [, [^, [:, [., или [="
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "Не одговара ( или \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "Не одговара \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Неисправан садржај \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Неисправан крај опсега"
+
+# исцрпљена? ;-)
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Меморија је потрошена"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Неисправан регуларан израз који претходи"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Прерани крај регуларног израза"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Регуларни израз је превелик"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "Не одговара ) или \\)"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Нема претходног регуларног израза"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Запаковао је %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Запаковао је %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Лиценца ОЈЛв3+: Гнуова ОЈЛ 3. издање или новије <%s>.\n"
+"Ово је слободан софтвер: слободни сте да га мењате и расподељујете.\n"
+"Не постоји НИКАКВА ГАРАНЦИЈА, у оквирима дозвољеним законом.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Написао је %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Написали су %s и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Написали су %s, %s, и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Написали су %s, %s, %s,\n"
+"и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Написали су %s, %s, %s,\n"
+"%s, и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Написали су %s, %s, %s,\n"
+"%s, %s, и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Написали су %s, %s, %s,\n"
+"%s, %s, %s, и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Написали су %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Написали су %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, и %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Написали су %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, и други.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "Грешке пријавите на: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Грешке %s пријавите на: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "%s матична страница: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Општа помоћ за Гнуов софтвер: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(стандардни улаз)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "неисправан аргумент дужине контекста"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "улаз је превелик за пребројавање"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: бинарна датотека одговара"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: дубинско вртење кроз директоријуме"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: улазна датотека је такође излаз"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Употреба: %s [ОПЦИЈА]... ШАБЛОНИ [ДАТОТЕКА]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Пробајте „%s --help“ за више података.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Тражи наведене ШАБЛОНЕ у свакој ДАТОТЕЦИ.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Пример: %s -i „hello world“ menu.h main.c\n"
+"ШАБЛОНИ може да садржи више шаблона раздвојених новим редовима.\n"
+"\n"
+"Одељак шаблона и тумачења:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp           ШАБЛОНИ су проширени регуларни изрази\n"
+"  -F, --fixed-strings             ШАБЛОНИ су ниск\n"
+"  -G, --basic-regexp              ШАБЛОНИ су основни регуларни изрази\n"
+"  -P, --perl-regexp               ШАБЛОНИ су регуларни изрази Перла\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=ШАБЛОНИ            користи ШАБЛОНЕ за подударање\n"
+"  -f, --file=ДАТОТЕКА             преузима ШАБЛОНЕ из ДАТОТЕКЕ\n"
+"  -i, --ignore-case               занемарује разлике величине слова у "
+"шаблонима и подацима\n"
+"      --no-ignore-case            не занемарује разлике величине слова "
+"(основно)\n"
+"  -w, --word-regexp               подудара једино целе речи\n"
+"  -x, --line-regexp               подудара једино целе редове\n"
+"  -z, --null-data                 ред података се завршава 0-бајтом, не "
+"новим редом\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Разно:\n"
+"  -s, --no-messages               искључује поруке о грешкама\n"
+"  -v, --invert-match              бира не-одговарајуће редове\n"
+"  -V, --version                   исписује податке о издању и излази\n"
+"      --help                      приказује ову помоћ и излази\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Излазне контроле:\n"
+"  -m, --max-count=БРОЈ            зауставља након БРОЈА изабраних редова\n"
+"  -b, --byte-offset               исписује померај бајта уз редове излаза\n"
+"  -n, --line-number               исписује број реда уз редове излаза\n"
+"      --line-buffered             претаче излаз на сваком реду\n"
+"  -H, --with-filename             исписује назив датотеке са редовима "
+"излаза\n"
+"  -h, --no-filename               потискује додавање префикса називу "
+"датотеке на излазу\n"
+"      --label=НАТПИС              користи НАТПИС као префикс назива датотеке "
+"стандардног улаза\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching             приказује само непразне делове редова који "
+"одговарају\n"
+"  -q, --quiet, --silent           потискује све нормалне излазе\n"
+"      --binary-files=ВРСТА        сматра да су извршне датотеке ВРСТЕ;\n"
+"                                  ВРСТА може бити „binary“, „text“, или "
+"„without-match“\n"
+"  -a, --text                      исто као и „--binary-files=text“\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                              исто као и „--binary-files=without-match“\n"
+"  -d, --directories=РАДЊА         како да рукује директоријумима;\n"
+"                                  РАДЊА може бити „read“, „recurse“, или "
+"„skip“\n"
+"  -D, --devices=РАДЊА             како да рукује уређајима, ФИФО-има и "
+"прикључницама;\n"
+"                                  РАДЊА може бити „read“ или „skip“\n"
+"  -r, --recursive                 исто као и „--directories=recurse“\n"
+"  -R, --dereference-recursive     слично, али прати све симболичке везе\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=ОПШТЕ             тражи само датотеке које се поклапају са "
+"ОПШТЕ (шаблон датотеке)\n"
+"      --exclude=ОПШТЕ             прескаче датотеке које се поклапају са "
+"ОПШТЕ\n"
+"      --exclude-from=ДАТОТЕКА     прескаче датотеке које се поклапају са "
+"било којим шаблоном из ДАТОТЕКЕ\n"
+"      --exclude-dir=ОПШТЕ         прескаче директоријуме који се поклапају "
+"са ОПШТЕ\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match       исписује само називе ДАТОТЕКА без "
+"изабраних редова\n"
+"  -l, --files-with-matches        исписује само називе ДАТОТЕКА са изабраним "
+"редовима\n"
+"  -c, --count                     исписује само број изабраних редова по "
+"ДАТОТЕЦИ\n"
+"  -T, --initial-tab               помера табове ред горе (ако је потребно)\n"
+"  -Z, --null                      исписује 0-ти бајт након назива ДАТОТЕКЕ\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Контроле контекста:\n"
+"  -B, --before-context=БРОЈ       исписује БРОЈ редова водећег контекста\n"
+"  -A, --after-context=БРОЈ        исписује БРОЈ редова пратећег контекста\n"
+"  -C, --context=БРОЈ              исписује БРОЈ редова излазног контекста\n"
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -БРОЈ                           исто као „--context=БРОЈ“\n"
+"      --color[=КАДА],\n"
+"      --colour[=КАДА]             користи обележиваче за истицање "
+"поклапајућих ниски\n"
+"                                  КАДА може бити „always“, „never“ или "
+"„auto“.\n"
+"  -U, --binary                    не исеца ЦР знакове на крају реда (МСДОС/"
+"Виндоуз)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Када је ДАТОТЕКА „-“, чита стандардни улаз. Без ДАТОТЕКЕ, чита . ако је "
+"дубински,\n"
+"у супротном „-“. Са мање од две ДАТОТЕКЕ, подразумева се „-h“.\n"
+"Излазно стање је 0 ако је изабран неки ред, у супротном 1;\n"
+"ако је дошло до неке грешке а „-q“ није дато, онда је излазно стање 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "наведени су трагачи у сукобу"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr "Поклапање за Перл није подржано у „--disable-perl-regexp“ извршној"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "неисправан трагач %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "непознат метод уређаја"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "неисправан највећи број"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "непозната врста бинарних датотека"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Написали су Мајк Хиртел и други; погледајте\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "нисам успео да доделим меморију за ПЦРЕ ЏИТ спремник"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "„-P“ подржава само једнобајтне и УТФ-8 језике"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "опција „-P“ подржава само самосталне шаблоне"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "унутрашња грешка (не треба никада да се деси)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "прекорачено је ограничење дужине реда ПЦРЕ-а"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: меморија је потрошена"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: потрошени ПЦРЕ ЈИТ спремник"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: прекорачено је ПЦРЕ-ово ограничење тражења уназад"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: прекорачено је ограничење ПЦРЕ дубачења"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: унутрашња грешка ПЦРЕ-а: %d"
+
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr ""
+#~ "упозорење: „GREP_OPTIONS“ је застарело; користите алијас или скрипту"
+
+#~ msgid "warning: %s: %s"
+#~ msgstr "упозорење: %s: %s"
+
+#~ msgid "%s home page: <http://www.gnu.org/software/%s/>\n"
+#~ msgstr "%s матична страница: <http://www.gnu.org/software/%s/>\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "неисправан %s%s аргумент „%s“"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "неисправан суфикс у %s%s аргументу „%s“"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "%s%s аргумент „%s“ је превелик"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Мајк Хартел"
+
+#~ msgid "internal error"
+#~ msgstr "унутрашња грешка"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: опција „--%s“ не дозвољава аргумент\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: непрепознатљива опција „--%s“\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: опција „-W %s“ је двосмислена\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: опција „-W %s“ не дозвољава аргумент\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: опција „-W %s“ захтева аргумент\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "„lseek“ није успело"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "ШАБЛОН је, по основи, основни регуларан израз (BRE).\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "„egrep“ значи „grep -E“.  „fgrep“ значи „grep -F“.\n"
+#~ "Директно призивање као „egrep“ или „fgrep“ није одобрено.\n"
+
+#~ msgid "unescaped ^ or $ not supported with -Pz"
+#~ msgstr "непреспојено ^ или $ није подржано са „-Pz“"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "Матична страница ГНУ Грепа: <%s>\n"
+
+#~ msgid "invalid UTF-8 byte sequence in input"
+#~ msgstr "неисправан низ УТФ-8 бита у улазу"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "ШАБЛОН је проширени регуларан израз (ERE).\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr "Позив као „egrep“ је застарео; користите „grep -E“ уместо тога.\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr "ШАБЛОН је скуп сталних низова у новим редовима.\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr "Позив као „fgrep“ је застарео; користите „grep -F“ уместо тога.\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s може да користи само %s синтаксу шаблона"
diff --git a/src/grep/po/stamp-po b/src/grep/po/stamp-po
new file mode 100644
index 0000000..9788f70
--- /dev/null
+++ b/src/grep/po/stamp-po
@@ -0,0 +1 @@
+timestamp
diff --git a/src/grep/po/sv.gmo b/src/grep/po/sv.gmo
new file mode 100644
index 0000000..1c92496
--- /dev/null
+++ b/src/grep/po/sv.gmo
diff --git a/src/grep/po/sv.po b/src/grep/po/sv.po
new file mode 100644
index 0000000..9406e08
--- /dev/null
+++ b/src/grep/po/sv.po
@@ -0,0 +1,959 @@
+# Swedish messages for GNU Grep
+# Copyright © 1996, 1998, 1999, 2000, 2001, 2006, 2007, 2008, 2009, 2010, 2011, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Thomas Olsson <cid95tho@student1.lu.se>, 1996.
+# Daniel Resare <daniel@resare.com>, 1998, 1999, 2000, 2001.
+# Daniel Nylander <po@danielnylander.se>, 2006, 2007, 2008, 2009, 2010, 2011.
+# Anders Jonsson <anders.jonsson@norsjovallen.se>, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 3.6.27\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-08-09 11:55+0200\n"
+"Last-Translator: Anders Jonsson <anders.jonsson@norsjovallen.se>\n"
+"Language-Team: Swedish <tp-sv@listor.tp-sv.se>\n"
+"Language: sv\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=utf-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"X-Generator: Poedit 2.4.2\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "ogiltigt argument %s för %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "tvetydigt argument %s för %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Giltiga argument är:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "programfel"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "stacköverspill"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "skrivfel"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "obalanserad ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "ogiltig teckenklass"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "syntax för teckenklass är [[:space:]], inte [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "oavslutad \\-sekvens"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "ogiltigt innehåll i \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "reguljärt uttryck är för stort"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "obalanserad ("
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "ingen syntax angiven"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "obalanserad )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Okänt systemfel"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: flaggan ”%s%s” är tvetydig\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: flaggan ”%s%s” är tvetydig. Möjligheter:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: okänd flagga ”%s%s”\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: flaggan ”%s%s” tillåter inget argument\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: flaggan ”%s%s” behöver ett argument\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: ogiltig flagga -- ”%c”\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: flaggan behöver ett argument -- ”%c”\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "minnet är slut"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "kan inte notera aktuell arbetskatalog"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "misslyckades med att återvända till ursprunglig arbetskatalog"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "misslyckades med att ställa in text/binärläge för filbeskrivare"
+
+# Då det skulle krävas att spara hela filen i UTF-8 för att kunna göra
+# detta rätt, känns det inte värt det. Speciellt eftersom funktionen
+# inte används i grep
+#
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "”"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "”"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Lyckades"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Ingen träff"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Ogiltigt reguljärt uttryck"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Ogiltigt sorteringstecken"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Ogiltigt teckenklassnamn"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Efterföljande omvänt snedstreck"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Ogiltig bakåtreferens"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Omatchad [, [^, [:, [. eller [="
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "Omatchad ( eller \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "Omatchad \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Ogiltigt innehåll i \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Ogiltigt intervallslut"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Minnet är slut"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Ogiltigt inledande reguljärt uttryck"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "För tidigt slut på reguljärt uttryck"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Reguljärt uttryck är för stort"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "Omatchad ) eller \\)"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Inget tidigare reguljärt uttryck"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Paketerad av %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Paketerad av %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Licens GPLv3+: GNU GPL version 3 eller senare <%s>.\n"
+"Det här är fri programvara: du får ändra och distribuera den.\n"
+"Det finns INGEN GARANTI, så långt som tillåts enligt lag.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Skriven av %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Skriven av %s och %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Skriven av %s, %s och %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Skriven av %s, %s, %s\n"
+"och %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Skriven av %s, %s, %s,\n"
+"%s och %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Skriven av %s, %s, %s,\n"
+"%s, %s och %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Skriven av %s, %s, %s,\n"
+"%s, %s, %s och %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Skriven av %s, %s, %s,\n"
+"%s, %s, %s, %s\n"
+"och %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Skriven av %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s och %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Skriven av %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s och andra.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"Rapportera fel till: %s\n"
+"Skicka synpunkter på översättningen till <tp-sv@listor.tp-sv.se>\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr ""
+"Rapportera fel i %s till: %s\n"
+"Skicka synpunkter på översättningen till <tp-sv@listor.tp-sv.se>\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Webbplats för %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Allmän hjälp för GNU-programvara: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(standard in)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "ogiltigt argument till -A, -B eller -C"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "det är för mycket indata för att räkna"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: binär fil matchar"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: varning: rekursiv katalogloop"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: inmatningsfilen är även utmatningen"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Användning: %s [FLAGGA]... MÖNSTER [FIL]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Försök med ”%s --help” för mer information\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Sök efter MÖNSTER i varje FIL.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Exempel: %s -i \"hello world\" menu.h main.c\n"
+"MÖNSTER kan innehålla flera mönster åtskilda av nyradstecken.\n"
+"\n"
+"Val och tolkning av mönster:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp      MÖNSTER är utökade reguljära uttryck\n"
+"  -F, --fixed-strings        MÖNSTER är strängar\n"
+"  -G, --basic-regexp         MÖNSTER är enkla reguljära uttryck\n"
+"  -P, --perl-regexp          MÖNSTER är reguljära uttryck som i Perl\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=MÖNSTER       använd MÖNSTER som ett reguljärt uttryck\n"
+"  -f, --file=FIL             ta MÖNSTER från FIL\n"
+"  -i, --ignore-case          skilj ej på gemener och versaler i mönster och "
+"data\n"
+"      --no-ignore-case       skilj på gemener och versaler (standard)\n"
+"  -w, --word-regexp          matcha endast hela ord\n"
+"  -x, --line-regexp          matcha endast hela rader\n"
+"  -z, --null-data            en datarad slutar i 0 byte, inte nyradstecken\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Diverse:\n"
+"  -s, --no-messages         visa inga felmeddelanden\n"
+"  -v, --invert-match        välj rader utan träffar\n"
+"  -V, --version             visa versionsinformation och avsluta\n"
+"      --help                visa detta hjälpmeddelande och avsluta\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Kontroll av utmatning:\n"
+"  -m, --max-count=ANTAL     avsluta efter ANTAL träffar\n"
+"  -b, --byte-offset         skriv ut byte-offset med utmatningsrader\n"
+"  -n, --line-number         skriv ut radnummer med utmatningsrader\n"
+"      --line-buffered       spola utmatning för varje rad\n"
+"  -H, --with-filename       skriv ut filnamn med utmatningsrader\n"
+"  -h, --no-filename         skriv inte ut filnamnets prefix vid utmatning\n"
+"      --label=ETIKETT       skriv ut ETIKETT som filnamnsprefix för standard "
+"in\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       visa endast icke-tomma delar av rader som "
+"matchar\n"
+"  -q, --quiet, --silent     undertryck all normal utmatning\n"
+"      --binary-files=TYP    anta att binärfiler är av TYP;\n"
+"                            TYP  är ”binary”, ”text” eller ”without-match”\n"
+"  -a, --text                samma som --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        samma som --binary-files=without-match\n"
+"  -d, --directories=ÅTGÄRD  hur kataloger ska hanteras;\n"
+"                            ÅTGÄRD är ”read”, ”recurse” eller ”skip”\n"
+"  -D, --devices=ÅTGÄRD      hur enheter, FIFO och uttag ska hanteras;\n"
+"                            ÅTGÄRD är ”read” eller ”skip”\n"
+"  -r, --recursive           samma som --directories=recurse\n"
+"  -R, --dereference-recursive  detsamma, men följ alla symboliska länkar\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=GLOB        sök endast filer som matchar GLOB (ett "
+"filmönster)\n"
+"      --exclude=GLOB        hoppa över filer som matchar GLOB\n"
+"      --exclude-from=FIL    hoppa över filer som matchar filmönster från "
+"FIL\n"
+"      --exclude-dir=GLOB    kataloger som matchar GLOB hoppas över\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match  skriv endast ut namn på FILer utan valda rader\n"
+"  -l, --files-with-matches  skriv endast ut namn på FILer med valda rader\n"
+"  -c, --count               skriv endast ut antalet valda rader per FIL\n"
+"  -T, --initial-tab         gör så att tabulatorer radas upp (om det "
+"behövs)\n"
+"  -Z, --null                skriv ut 0-tecken efter FILnamn\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Kontroll av sammanhang:\n"
+"  -B, --before-context=ANTAL skriv ANTAL rader före träffad rad\n"
+"  -A, --after-context=ANTAL  skriv ANTAL rader efter träffad rad\n"
+"  -C, --context=ANTAL        skriv ANTAL rader runt träffad rad\n"
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -ANTAL                    samma som --context=ANTAL\n"
+"      --group-separator=SEP  skriv ut SEP på rad mellan matchningar med "
+"sammanhang\n"
+"      --no-group-separator  skriv inte ut separator för matchningar med "
+"sammanhang\n"
+"      --color[=NÄR],\n"
+"      --colour[=NÄR]        använd markörer för att särskilja träff\n"
+"                            NÄR kan vara ”always”, ”never” eller ”auto”.\n"
+"  -U, --binary              ta inte bort CR-tecken vid radslut (MSDOS/"
+"Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"När FIL är ”-”, läs från standard in.  Läs ”.” då FIL saknas om\n"
+"rekursiv, läs ”-” annars.  Om färre än två FILer anges, anta -h.\n"
+"Avslutningsstatus är 0 om någon rad, annars 1;\n"
+"om något fel inträffar och -q inte angavs, är avslutningsstatusen 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "motstridiga söksträngar angivna"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr "Perlmatchning stöds inte i ett bygge med --disable-perl-regexp"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "ogiltig matchning %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "okänd metod för enheter"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr "varning: --unix-byte-offsets (-u) är föråldrat"
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "ogiltigt värde för antal träffar"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "okänd binärfiltyp"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Skrivet av Mike Haertel och andra, se <https://git.sv.gnu.org/cgit/grep.git/"
+"tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "misslyckades med att allokera minne för JIT-stacken för PCRE"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P stöder endast unibyte- och UTF-8-lokaler"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "flaggan -P har endast stöd för ett mönster"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "internt fel (bör aldrig inträffa)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "översteg radlängdsgräns för PCRE"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: minnet är slut"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: fyllde JIT-stacken för PCRE"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: översteg gräns för PCRE-bakåtspårning"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: översteg rekursionsgräns för PCRE"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: internt PCRE-fel: %d"
+
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr ""
+#~ "warning: GREP_OPTIONS är föråldrat; använd ett alias eller ett skript"
+
+#~ msgid "warning: %s: %s"
+#~ msgstr "varning: %s: %s"
+
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "Webbplats för %s: <https://www.gnu.org/software/%s/>\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "ogiltigt %s%s-argument ”%s”"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "ogiltigt suffix i %s%s-argumentet ”%s”"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "%s%s-argumentet ”%s” är för stort"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "internal error"
+#~ msgstr "internt fel"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: flaggan ”--%s” tillåter inget argument\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: okänd flagga ”--%s”\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: flaggan ”-W %s” är tvetydig\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: flaggan ”-W %s” tillåter inget argument\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: flaggan ”-W %s” behöver ett argument\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "lseek misslyckades"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "MÖNSTER är, som standard, ett enkelt reguljärt uttryck (BRE).\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "”egrep” betyder ”grep -E”.  ”fgrep” betyder ”grep -F”.\n"
+#~ "Direktanrop som antingen ”egrep” eller ”fgrep” är föråldrat.\n"
+
+#~ msgid "unescaped ^ or $ not supported with -Pz"
+#~ msgstr "oskyddat ^ eller $ stöds ej med -Pz"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "Webbplats för GNU Grep: <%s>\n"
+
+#~ msgid "invalid UTF-8 byte sequence in input"
+#~ msgstr "ogiltig UTF-8-bytesekvens i inmatning"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "oavslutad repetitionsräknare"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "felformaterad repetionsräknare"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "MÖNSTER är ett utökat reguljärt uttryck (ERE).\n"
+
+#~ msgid "Invocation as `egrep' is deprecated; use `grep -E' instead.\n"
+#~ msgstr "Körning som \"egrep\" är föråldrat; använd \"grep -E\" istället.\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr "MÖNSTER är en uppsättning nyradsseparerade fasta strängar.\n"
+
+#~ msgid "Invocation as `fgrep' is deprecated; use `grep -F' instead.\n"
+#~ msgstr "Körning som \"fgrep\" är föråldrat; använd \"grep -F\" istället.\n"
+
+#~ msgid "writing output"
+#~ msgstr "skriver utdata"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s kan endast använda %s-mönstersyntax"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity needs a value (\"=...\"); "
+#~ "skipped"
+#~ msgstr ""
+#~ "i GREP_COLORS=\"%s\", \"%s\"-kapaciteten behöver ett värde (\"=...\"); "
+#~ "hoppades över"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity is boolean and cannot take a "
+#~ "value (\"=%s\"); skipped"
+#~ msgstr ""
+#~ "i GREP_COLORS=\"%s\", \"%s\"-kapaciteten är boolesk och kan inte ta ett "
+#~ "värde (\"=%s\"); hoppades över"
+
+#~ msgid "in GREP_COLORS=\"%s\", the \"%s\" capacity %s"
+#~ msgstr "i GREP_COLORS=\"%s\", \"%s\"-kapaciteten %s"
+
+#~ msgid ""
+#~ "stopped processing of ill-formed GREP_COLORS=\"%s\" at remaining "
+#~ "substring \"%s\""
+#~ msgstr ""
+#~ "stoppade behandling av felformulerad GREP_COLORS=\"%s\" på återstående "
+#~ "understrängen \"%s\""
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE;\n"
+#~ "                            TYPE is `binary', `text', or `without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories;\n"
+#~ "                            ACTION is `read', `recurse', or `skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+#~ "                            ACTION is `read' or `skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=FILE_PATTERN  search only files that match FILE_PATTERN\n"
+#~ "      --exclude=FILE_PATTERN  skip files and directories matching "
+#~ "FILE_PATTERN\n"
+#~ "      --exclude-from=FILE   skip files matching any file pattern from "
+#~ "FILE\n"
+#~ "      --exclude-dir=PATTERN directories that match PATTERN will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match print only names of FILEs containing no "
+#~ "match\n"
+#~ "  -l, --files-with-matches  print only names of FILEs containing matches\n"
+#~ "  -c, --count               print only a count of matching lines per "
+#~ "FILE\n"
+#~ "  -T, --initial-tab         make tabs line up (if needed)\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Styrning av utskrift:\n"
+#~ "  -m, --max-count=NUM       skriv bara ut NUM träffar\n"
+#~ "  -b, --byte-offset         skriv position med visade rader\n"
+#~ "  -n, --line-number         skriv radnummer med visade rader\n"
+#~ "      --line-buffered       töm utskriftsbuffer efter varje rad\n"
+#~ "  -H, --with-filename       skriv filnamn vid varje träff\n"
+#~ "  -h, --no-filename         skriv inte filnamn vid varje visad rad\n"
+#~ "      --label=ETIKETT       skriv ut ETIKETT som filnamn för standard in\n"
+#~ "  -o, --only-matching       visa endast delen av en rad som matchar "
+#~ "MÖNSTER\n"
+#~ "  -q, --quiet, --silent     undvik all normal utskrift\n"
+#~ "      --binary-files=TYP    antag att binära filer är av TYP\n"
+#~ "                            TYP är \"binary\", \"text\" eller \"without-"
+#~ "match\"\n"
+#~ "  -a, --text                motsvarar --binary-files=text\n"
+#~ "  -I                        motsvarar --binary-files=without-match\n"
+#~ "  -d, --directories=ÅTGÄRD  hur kataloger skall hanteras\n"
+#~ "                            ÅTGÄRD är \"read\", \"recurse\" eller \"skip"
+#~ "\".\n"
+#~ "  -D, --devices=ÅTGÄRD      hur enheter hanteras, FIFO:er och uttag\n"
+#~ "                            ÅTGÄRD är \"read\" eller \"skip\"\n"
+#~ "  -R, -r, --recursive       motsvarar --directories=recurse\n"
+#~ "      --include=MÖNSTER     filer som matchar MÖNSTER undersöks\n"
+#~ "      --exclude=MÖNSTER     filer som matchar MÖNSTER hoppas över\n"
+#~ "      --exclude-from=FIL    filer som matchar mönster i FIL hoppas över\n"
+#~ "      --exclude-dir=MÖNSTER kataloger som matchar MÖNSTER hoppas över.\n"
+#~ "  -L, --files-without-match skriv bara ut FILnamn utan träffar\n"
+#~ "  -l, --files-with-matches  skriv bara ut FILnamn med träffar\n"
+#~ "  -c, --count               skriv för varje FIL bara ut antal träffade "
+#~ "rader\n"
+#~ "  -T, --initial-tab         gör så tabulatorer radar upp (om det behövs)\n"
+#~ "  -Z, --null                skriv 0-byte efter FILnamn\n"
+
+#~ msgid "unknown directories method"
+#~ msgstr "okänd metod gällande kataloger"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "Flaggorna -P och -z kan inte kombineras"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: otillåten flagga -- %c\n"
+
+#~ msgid "Copyright (C) 2008 Free Software Foundation, Inc.\n"
+#~ msgstr "Copyright © 2008 Free Software Foundation, Inc.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions.  There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "Det här är fri programvara, se källkoden för kopieringsvillkor. Det\n"
+#~ "finns INGEN garanti, inte ens för SÄLJBARHET eller LÄMPLIGHET FÖR NÅGOT\n"
+#~ "SPECIELLT ÄNDAMÅL.\n"
+
+#~ msgid "out of memory"
+#~ msgstr "minnet slut"
+
+#~ msgid "Usage: %s [OPTION]... PATTERN [FILE] ...\n"
+#~ msgstr "Användning: %s [FLAGGA]... MÖNSTER [FIL]...\n"
+
+#~ msgid "%s (GNU grep) %s\n"
+#~ msgstr "%s (GNU grep) %s\n"
diff --git a/src/grep/po/th.gmo b/src/grep/po/th.gmo
new file mode 100644
index 0000000..a2e95cd
--- /dev/null
+++ b/src/grep/po/th.gmo
diff --git a/src/grep/po/th.po b/src/grep/po/th.po
new file mode 100644
index 0000000..314acc6
--- /dev/null
+++ b/src/grep/po/th.po
@@ -0,0 +1,788 @@
+# Translation of grep messages to Thai.
+# Copyright (C) 2018 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Seksan Poltree <seksan.poltree@gmail.com>, 2009-2018.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep-3.1.48\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2018-12-17 01:11+0700\n"
+"Last-Translator: Seksan Poltree <seksan.poltree@gmail.com>\n"
+"Language-Team: Thai <thai-l10n@googlegroups.com>\n"
+"Language: th\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "อาร์กิวเมนต์ %s ไม่ถูกต้องสำหรับ %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "อาร์กิวเมนต์ %s กำกวมไม่ชัดเจน สำหรับ %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "อาร์กิวเมนต์ที่ใช้ได้ ได้แก่:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "โปรแกรมผิดพลาด"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "stack overflow"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "การเขียนผิดพลาด"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "[ ไม่สมดุลกัน"
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "ชื่อกลุ่มชุดอักขระไม่ถูกต้อง"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "วากยสัมพันธ์ของกลุ่มชุดอักขระ คือ [[:space:]], ไม่ใช่ [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "เครื่องหมายหลีก \\ ไม่จบ"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "เนื้อหาของ \\{\\} ไม่ถูกต้อง"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "นิพจน์ปกติใหญ่เกินไป"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "( ไม่สมดุลกัน"
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "ไม่ระบุวากยสัมพันธ์"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr ") ไม่สมดุลกัน"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "ข้อผิดพลาดของระบบที่ไม่รู้จัก"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: ตัวเลือก '%s%s' คลุมเครือไม่ชัดเจน\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: ตัวเลือก '%s%s' คลุมเครือไม่ชัดเจน; เป็นไปได้ที่จะเป็น:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: ตัวเลือกที่ไม่รู้จัก '%s%s'\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: ตัวเลือก '%s%s' ไม่อนุญาตให้มีอาร์กิวเมนต์\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: ตัวเลือก '%s%s' ต้องการอาร์กิวเมนต์\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: ตัวเลือกไม่ถูกต้อง -- '%c'\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: ตัวเลือกต้องการอาร์กิวเมนต์ -- '%c'\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "หน่วยความจำถูกใช้จนหมด"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "ไม่สามารถบันทีกไดเรกทอรีที่ทำงานปัจจุบัน"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "ล้มเหลวในการกลับไปยังไดเรกทอรีทำงานเริ่มต้น"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "ล้มเหลวในการตั้งค่าตัวอธิบายไฟล์ในโหมดข้อความ/ไบนารี"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "`"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "'"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "สำเร็จ"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "ไม่ตรงกัน"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "นิพจน์ปกติไม่ถูกต้อง"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "ผลการเทียบกันของอักขระผิดพลาด"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "ชื่อกลุ่มชุดอักขระไม่ถูกต้อง"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "เครื่องหมายแบ็คสแลชตามท้าย"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "การอ้างอิงกลับไม่ถูกต้อง"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "ไม่ตรงกันกับ [, [^, [:, [., หรือ [="
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "ไม่ตรงกันกับ ( หรือ \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "ไม่ตรงกันกับ \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "เนื้อหาของ \\{\\} ไม่ถูกต้อง"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "ช่วงจบไม่ถูกต้อง"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "หน่วยความจำถูกใช้จนหมด"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "นิพจน์ปกติก่อนหน้าไม่ถูกต้อง"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "นิพจน์ปกติจบโดยยังไม่สมบูรณ์"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "นิพจน์ปกติใหญ่เกินไป"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "ไม่ตรงกันกับ ) หรือ \\)"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "ไม่มีนิพจน์ปกติก่อนหน้า"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "สร้างแพกเกจโดย %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "สร้างแพกเกจโดย %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "(C)"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, fuzzy, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"\n"
+"สัญญาอนุญาต GPLv3+: GNU GPL รุ่น 3 หรือใหม่กว่า <http://www.gnu.org/licenses/gpl."
+"html>\n"
+"นี่เป็นซอฟต์แวร์เสรี: คุณมีเสรีในการปรับเปลี่ยนและการส่งต่อมัน.\n"
+"มีการไม่รับประกัน, จากขอบเขตที่อนุญาตโดยกฎหมาย.\n"
+"\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "เขียนโดย %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "เขียนโดย  %s และ %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "เขียนโดย  %s, %s, และ %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"เขียนโดย  %s, %s, %s,\n"
+"และ %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"เขียนโดย  %s, %s, %s,\n"
+"%s, และ %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"เขียนโดย  %s, %s, %s,\n"
+"%s, %s, และ %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"เขียนโดย  %s, %s, %s,\n"
+"%s, %s, %s, และ %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"เขียนโดย  %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"และ %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"เขียนโดย  %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, และ %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"เขียนโดย  %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, และคณะ.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, fuzzy, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"\n"
+"รายงานข้อผิดพลาดไปยัง: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "รายงานข้อผิดพลาดของ %s ไปยัง: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "โฮมเพจของ %s : <%s>\n"
+
+#: lib/version-etc.c:260
+#, fuzzy, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "ความช่วยเหลือทั่วไปในการใช้ซอฟต์แวร์ GNU: <https://www.gnu.org/gethelp/>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(นำเข้ามาตรฐาน)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "ความยาวบริบทอาร์กิวเมนต์ไม่ถูกต้อง"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "ข้อมูลเข้ายาวเกินกว่าจะนับได้"
+
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "ตรงกันกันกับแฟ้มฐานสอง %s\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "เรียกซ้ำไดเรกทอรีเป็นวงวน"
+
+#: src/grep.c:1899
+#, fuzzy, c-format
+msgid "%s: input file is also the output"
+msgstr "แฟ้มนำเข้า %s เป็นแฟ้มส่งออกด้วยเหมือนกัน"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "วิธีใช้: %s [OPTION]… PATTERNS [FILE]…\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "ลองใช้ '%s --help' เพื่อข้อมูลเพิ่มเติม.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "ค้นหาสำหรับ PATTERNS ในแต่ละ FILE.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"ตัวอย่าง: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS สามารถประกอบด้วยหลายรูปแบบโดยแยกด้วยตัวขึ้นบรรทัดใหม่\n"
+"\n"
+"การเลือกนิพจน์ปกติและการแปลความหมาย:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     PATTERNS เป็นส่วนขยายนิพจน์ปกติ\n"
+"  -F, --fixed-strings       PATTERNS เป็นชุดสายอักขระ\n"
+"  -G, --basic-regexp        PATTERNS เป็นนิพจน์ปกติพื้นฐาน (BRE)\n"
+"  -P, --perl-regexp         PATTERNS เป็นนิพจน์ปกติภาษา Perl\n"
+
+#: src/grep.c:1981
+#, fuzzy, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=PATTERN      ใช้ PATTERNS สำหรับการจับคู่กัน\n"
+"  -f, --file=FILE           รับ PATTERNS มาจาก FILE\n"
+"  -i, --ignore-case         เพิกเฉยต่อความแตกต่างอักษรใหญ่เล็ก\n"
+"  -w, --word-regexp         บังคับให้จับคู่เฉพาะที่ตรงกันทั้งคำเท่านั้น\n"
+"  -x, --line-regexp         บังคับให้จับคู่เฉพาะที่ตรงกันทั้งบรรทัดเท่าทั้น\n"
+"  -z, --null-data           ข้อมูลบรรทัดจบด้วยขนาด 0 ไบต์, ไม่มีตัวขึ้นบรรทัดใหม่\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"เบ็ดเตล็ด:\n"
+"  -s, --no-messages         ระงับข้อความแสดงข้อผิดพลาด\n"
+"  -v, --invert-match        เลือกบรรทัดที่ไม่ตรงกัน\n"
+"  -V, --version             พิมพ์ข้อมูลรุ่นแล้วออก\n"
+"      --help                แสดงความช่วยเหลือนี้แล้วออก\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"ควบคุมการนำออก:\n"
+"  -m, --max-count=NUM       หยุดหลังจากมี NUM บรรทัดที่ถูกเลือก\n"
+"  -b, --byte-offset         พิมพ์การชดเชยไบต์กับบรรทัดนำออก\n"
+"  -n, --line-number         พิมพ์หมายเลขบรรทัดกับบรรทัดนำออก\n"
+"      --line-buffered       ล้างนำออกบนทุก ๆ บรรทัด\n"
+"  -H, --with-filename       พิมพ์ชื่อแฟ้มกับบรรทัดนำออก\n"
+"  -h, --no-filename         ระงับคำนำหน้าชื่อแฟ้มในการนำออก\n"
+"      --label=LABEL         ใช้ LABEL เป็นชื่อคำนำหน้าแฟ้มสำหรับนำเข้ามาตรฐาน\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       แสดงเพียงแต่ส่วนของบรรทัดที่ไม่ว่างเปล่าของบรรทัดที่ตรงกัน\n"
+"  -q, --quiet, --silent     ระงับนำออกปกติทั้งหมด\n"
+"      --binary-files=TYPE   ทึกทักเอาว่าแฟ้มฐานสองเป็น TYPE;\n"
+"                            TYPE เป็น 'binary', 'text', หรือ 'without-match'\n"
+"  -a, --text                มีค่าเท่ากันกับ --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        มีค่าเท่ากันกับ --binary-files=without-match\n"
+"  -d, --directories=ACTION  จะทำการจัดการไดเรกทอรีอย่างไร;\n"
+"                            ACTION เป็น 'read', 'recurse', หรือ 'skip'\n"
+"  -D, --devices=ACTION      จะทำการจัดการอุปกรณ์อย่างไร, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           เหมือนกับ --directories=recurse\n"
+"  -R, --dereference-recursive  เช่นกัน, แต่ตาม symlink ทั้งหมด\n"
+
+#: src/grep.c:2023
+#, fuzzy, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=GLOB  ค้นหาเพียงแต่แฟ้มที่ตรงกันกับ GLOB(รูปแบบชื่อไฟล์)\n"
+"      --exclude=GLOB  ข้ามแฟ้มและไดเร็กทอรีที่ตรงกันกับ GLOB\n"
+"      --exclude-from=FILE   ข้ามแฟ้มที่ตรงกันกับแบบแผนแฟ้มจาก FILE\n"
+"      --exclude-dir=GLOB  ข้ามไดเร็กทอรีที่ตรงกันกับ GLOB\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match  พิมพ์เพียงแค่ชื่อของ FILEs ที่ไม่ตรงกันกับบรรทัดที่ถูกเลือก\n"
+"  -l, --files-with-matches  พิมพ์เพียงแค่ชื่อของ FILEs กับบรรทัดที่ถูกเลือก\n"
+"  -c, --count               พิมพ์เพียงแต่จำนวนบรรทัดที่ตรงกันที่นับได้ในแต่ละ FILE\n"
+"  -T, --initial-tab         ทำการจัดเตรียมแท็บ (ถ้าจำเป็น)\n"
+"  -Z, --null                พิมพ์ 0 ไบต์หลังชื่อ FILE\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"ควบคุมบริบท:\n"
+"  -B, --before-context=NUM  พิมพ์ NUM บรรทัดของบริบทส่วนนำ\n"
+"  -A, --after-context=NUM   พิมพ์ NUM บรรทัดของบริบทส่วนตาม\n"
+"  -C, --context=NUM         พิมพ์ NUM บรรทัดของบริบทส่งออก\n"
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NUM                      เหมือนกับ --context=NUM\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       ใช้เครื่องหมายกำกับเพื่อเน้นสายอักขระที่ตรงกัน;\n"
+"                            เมื่อ WHEN ได้แก่ 'always', 'never', หรือ 'auto'\n"
+"  -U, --binary              ไม่ต้องถอดอักขระ CR ที่ EOL (MSDOS/Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, fuzzy, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"เมื่อ FILE เป็น -, อ่านจากนำเข้ามาตรฐาน. กับไม่มี FILE อ่าน. ถ้าเรียกซ้ำ\n"
+",  - แทน. ถ้าให้ FILE มาน้อยกว่าสอง. ทึกทักเอาว่าเป็น -h\n"
+"สถานะการออกเป็น 0 เมื่อบรรทัดใด ๆ (หรือ ไฟล์ถ้า -L)ถูกเลือก, 1แทน ;\n"
+"ถ้าเกิดข้อผิดพลาดขึ้นและ -q ไม่ได้ถูกให้มา, สถานะการออกเป็น 2\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "การขัดแย้งของการตรงกันได้รับการระบุ"
+
+#: src/grep.c:2101
+#, fuzzy
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr "การสนับสนุนตัวเลือก -P ไม่ได้ถูกรวบรวมไปยังแฟ้มฐานสอง --disable-perl-regexp นี้"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "ตัวจับคู่ไม่ถูกต้อง %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "ไม่รู้จักกระบวนการอุปกรณ์"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "ตัวนับสูงสุดไม่ถูกต้อง"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "ชนิดแฟ้มไบนารีที่ไม่รู้จัก"
+
+#: src/grep.c:2829
+#, fuzzy
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr "อื่น ๆ , ดูที่ <https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>"
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "ล้มเหลวที่จะจัดสรรหน่วยความจำสำหรับสแต็ก PCRE JIT"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P สนับสนุนเฉพาะโลแคล unibyte และ UTF-8"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "ตัวเลือก -P สนับสนุนรูปแบบเดียวเท่านั้น"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "ข้อผิดพลาดภายใน (ไม่ควรเกิดขึ้นมาก่อน)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "ขอบเขตความยาวบรรทัด PCRE เกินจากข้อจำกัด"
+
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "หน่วยความจำถูกใช้จนหมด"
+
+#: src/pcresearch.c:310
+#, fuzzy, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "แสต็ก PCRE JIT ถูกใช้จนหมดแล้ว"
+
+#: src/pcresearch.c:315
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "ขอบเขตการ backtrack ของ PCRE เกินจากข้อจำกัด"
+
+#: src/pcresearch.c:319
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "ขอบเขตการ backtrack ของ PCRE เกินจากข้อจำกัด"
+
+#: src/pcresearch.c:327
+#, fuzzy, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "ข้อผิดพลาด PCRE ภายใน: %d"
+
+#, c-format
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr "คำเตือน: GREP_OPTIONS ไม่สนับสนุนให้ใช้ ; กรุณาใช้นามแฝงหรือสคริปต์"
+
+#, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "คำเตือน: %s: %s"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "%s%s รับอาร์กิวเมนต์ที่ไม่ถูกต้อง '%s'"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "คำเสริมท้ายไม่ถูกต้องใน %s%s อาร์กิวเมนต์ '%s'"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "%s%s อาร์กิวเมนต์ '%s' ใหญ่มากเกินไป"
+
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "โฮมเพจของ %s : <http://www.gnu.org/software/%s/>\n"
+
+#~ msgid "internal error"
+#~ msgstr "ข้อผิดพลาดภายใน"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "ไมค์ ฮาเออร์เทล"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: ตัวเลือก '--%s' ไม่อนุญาตให้มีอาร์กิวเมนต์\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: ตัวเลือกที่ไม่รู้จัก '--%s'\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: ตัวเลือก '-W %s' คลุมเครือไม่ชัดเจน\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: ตัวเลือก '-W %s' ไม่อนุญาตให้มีอาร์กิวเมนต์\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: ตัวเลือก '-W %s' ต้องการอาร์กิวเมนต์\n"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "PATTERN โดยมาตรฐานเป็นนิพจน์ปกติพื้นฐาน (BRE).\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "'egrep'  หมายถึง 'grep -E'. 'fgrep' หมายถึง 'grep -F'.\n"
+#~ "การร้องขอโดยตรงทั้ง 'egrep' หรือ 'fgrep' ไม่แนะนำให้ใช้.\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "lseek ล้มเหลว"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "โฮมเพจ GNU Grep : <%s>\n"
+
+#~ msgid "invalid UTF-8 byte sequence in input"
+#~ msgstr "ลำดับไบต์ UTF-8 ที่นำเข้าไม่ถูกต้อง"
diff --git a/src/grep/po/tr.gmo b/src/grep/po/tr.gmo
new file mode 100644
index 0000000..14ed8d6
--- /dev/null
+++ b/src/grep/po/tr.gmo
diff --git a/src/grep/po/tr.po b/src/grep/po/tr.po
new file mode 100644
index 0000000..96e6cca
--- /dev/null
+++ b/src/grep/po/tr.po
@@ -0,0 +1,816 @@
+# Turkish translations for GNU grep messages.
+# Copyright (C) 2005 Free Software Foundation, Inc.
+# Nilgün Belma Bugüner <nilgun@superonline.com>, 2001, ..., 2005
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 2.5.1a\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2005-03-04 16:37+0300\n"
+"Last-Translator: Nilgün Belma Bugüner <nilgun@superonline.com>\n"
+"Language-Team: Turkish <gnu-tr-u12a@lists.sourceforge.net>\n"
+"Language: tr\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"X-Generator: KBabel 1.0\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr ""
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr ""
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr ""
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr ""
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr ""
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr ""
+
+#: lib/dfa.c:896
+#, fuzzy
+msgid "unbalanced ["
+msgstr "Karşılıksız ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr ""
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr ""
+
+#: lib/dfa.c:1210
+#, fuzzy
+msgid "unfinished \\ escape"
+msgstr "Tamamlanmamış \\ öncelemi"
+
+#: lib/dfa.c:1371
+#, fuzzy
+msgid "invalid content of \\{\\}"
+msgstr "en çok miktarı geçersiz"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr ""
+
+#: lib/dfa.c:1858
+#, fuzzy
+msgid "unbalanced ("
+msgstr "Karşılıksız ("
+
+#: lib/dfa.c:1975
+#, fuzzy
+msgid "no syntax specified"
+msgstr "Sözdizimi belirtilmemiş"
+
+#: lib/dfa.c:1986
+#, fuzzy
+msgid "unbalanced )"
+msgstr "Karşılıksız )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Bilinmeyen sistem hatası"
+
+#: lib/getopt.c:278
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: `%s' seçeneği belirsiz\n"
+
+#: lib/getopt.c:284
+#, fuzzy, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: `%s' seçeneği belirsiz\n"
+
+#: lib/getopt.c:319
+#, fuzzy, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: `%c%s' seçeneği bilinmiyor\n"
+
+#: lib/getopt.c:345
+#, fuzzy, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: seçenek `%c%s' argümansız kullanılır\n"
+
+#: lib/getopt.c:360
+#, fuzzy, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: `%s' seçeneği bir argümanla kullanılır\n"
+
+#: lib/getopt.c:621
+#, fuzzy, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: geçersiz seçenek -- %c\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, fuzzy, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: seçenek bir argümanla kullanılır -- %c\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "bellek tükendi"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr ""
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr ""
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr ""
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "`"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "'"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr ""
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr ""
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr ""
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr ""
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr ""
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr ""
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr ""
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr ""
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr ""
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr ""
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr ""
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr ""
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Bellek tükendi"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr ""
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr ""
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr ""
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ""
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr ""
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr ""
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr ""
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr ""
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, fuzzy, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"\n"
+"Yazılım hatalarını <bug-grep@gnu.org> adresine,\n"
+"çeviri hatalarını <gnu-tr-u12a@lists.sourceforge.net> adresine bildirin.\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr ""
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr ""
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr ""
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(standart girdi)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "bağlam uzunluk değeri geçersiz"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "girdi sayılamayacak kadar büyük"
+
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "İkilik dosya %s eşleşir\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "ardışık dizin çevrimi"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr ""
+
+#: src/grep.c:1961 src/grep.c:1968
+#, fuzzy, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Kullanımı: %s [SEÇENEK]... MASKE [DOSYA]...\n"
+
+#: src/grep.c:1963
+#, fuzzy, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Daha fazla bilgi için `%s --help' yazın.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr ""
+
+#: src/grep.c:1970
+#, fuzzy, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Standart girdi ya da her DOSYA içinde KALIP için arama yapar.\n"
+"Örneğin: %s -i 'merhaba dunya' menu.h main.c\n"
+"\n"
+"Düzenli ifade seçimi ve yorumlanması:\n"
+
+#: src/grep.c:1975
+#, fuzzy, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     KALIP bir genişletilmiş düzenli ifadedir\n"
+"  -F, --fixed-strings       KALIP satır satır ayrılmış bir dizgedir\n"
+"  -G, --basic-regexp        KALIP bir temel düzenli ifadedir\n"
+"  -P, --perl-regexp         KALIP bir Perl düzenli ifadesidir\n"
+
+#: src/grep.c:1981
+#, fuzzy, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=KALIP     KALIP bir düzenli ifade olarak kullanılır\n"
+"  -f, --file=DOSYA       KALIP DOSYA dan alınır\n"
+"  -i, --ignore-case      harf büyüklüklerini bir ayrım olarak görmez\n"
+"  -w, --word-regexp      KALIP bir deyim olarak ele alınır\n"
+"  -x, --line-regexp      KALIP bir bütün satır olarak ele alınır\n"
+"  -z, --null-data        satır sonu içermeyen 0 baytlık satır\n"
+
+#: src/grep.c:1989
+#, fuzzy, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Çeşitli:\n"
+"  -s, --no-messages         hata iletileri gösterilmez\n"
+"  -v, --invert-match        eşleşmeyen satırlar seçilir\n"
+"  -V, --version             sürümü gösterir ve çıkar\n"
+"      --help                bu iletileri gösterir ve çıkar\n"
+"      --mmap                mümkünse bellek-eşlemli girdi kullanılır\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"\n"
+"Bağlamsal denetim:\n"
+"  -B, --before-context=SAYI bağlamdan önceki SAYI satır gösterilir\n"
+"  -A, --after-context=SAYI  bağlamdan sonraki SAYI satır gösterilir\n"
+"  -C, --context=SAYI        çıktı olarak SAYI satır gösterilir\n"
+"  -SAYI                     --context=SAYI ile aynı\n"
+"      --color[=SÜREÇ],\n"
+"      --colour[=SÜREÇ]      eşleşen dizgeleri ayırt etmede renk kullanılır\n"
+"                            SÜREÇ: daima 'always', hiç 'never', 'auto'  -U, "
+"--binary              satır sonlarındaki satırbaşı (CR) karakterlerini\n"
+"                            kaldırmaz\n"
+"  -u, --unix-byte-offsets   satırbaşı karakterlerine bakmaz\n"
+"\n"
+"`egrep' ile `grep -E',  `fgrep' ile `grep -F' aynı işi yapar.\n"
+"DOSYA verilmeksizin ya da yerine - verilirse standart girdi okunur.\n"
+"İki DOSYAdan az verilmişse -h varsayılır.\n"
+"Çıkışta durum eşleşme varsa 0, yoksa 1, belirsizlik varsa 2 dir.\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "birbiriyle çatışan eşleştiriciler belirtildi"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+
+#: src/grep.c:2103
+#, fuzzy, c-format
+msgid "invalid matcher %s"
+msgstr "en çok miktarı geçersiz"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "bilinmeyen aygıt yöntemi"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "en çok miktarı geçersiz"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "bilinmeyen ikilik dosya türü"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr ""
+
+#: src/pcresearch.c:143
+#, fuzzy
+msgid "the -P option only supports a single pattern"
+msgstr "-P seçeneği desteklenmiyor"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr ""
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr ""
+
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "bellek tükendi"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr ""
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr ""
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr ""
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr ""
+
+#, fuzzy, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "uyarı: %s: %s\n"
+
+#, fuzzy
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: `--%s' seçeneği argümansız kullanılır\n"
+
+#, fuzzy
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: `--%s' seçeneği bilinmiyor\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: `-W %s' seçeneği belirsiz\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: `-W %s' seçeneği argümansız kullanılır\n"
+
+#, fuzzy
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: `%s' seçeneği bir argümanla kullanılır\n"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "Tamamlanmamış tekrar sayısı"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "Tekrar sayısı hatalı"
+
+#~ msgid "out of memory"
+#~ msgstr "bellek yetersiz"
+
+#~ msgid "writing output"
+#~ msgstr "çıktıyı yazıyor"
+
+#~ msgid "Usage: %s [OPTION]... PATTERN [FILE] ...\n"
+#~ msgstr "Kullanımı: %s [SEÇENEK]... KALIP [DOSYA] ...\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE\n"
+#~ "                            TYPE is 'binary', 'text', or 'without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories\n"
+#~ "                            ACTION is 'read', 'recurse', or 'skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets\n"
+#~ "                            ACTION is 'read' or 'skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=PATTERN     files that match PATTERN will be examined\n"
+#~ "      --exclude=PATTERN     files that match PATTERN will be skipped.\n"
+#~ "      --exclude-from=FILE   files that match PATTERN in FILE will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match only print FILE names containing no match\n"
+#~ "  -l, --files-with-matches  only print FILE names containing matches\n"
+#~ "  -c, --count               only print a count of matching lines per "
+#~ "FILE\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "Çıktı denetimi:\n"
+#~ "  -m, --max-count=SAYI      SAYI eşleşmeden sonra durur\n"
+#~ "  -b, --byte-offset         çıktı satırlarında bayt adresi de gösterilir\n"
+#~ "  -n, --line-number         çıktı satırlarında satır no.ları da "
+#~ "gösterilir\n"
+#~ "      --line-buffered       her satırda tüm çıktı gösterilir\n"
+#~ "  -H, --with-filename       her eşleşmede dosya ismi de gösterilir\n"
+#~ "  -h, --no-filename         dosya ismi gösterilmez\n"
+#~ "      --label=ETİKET        standar girdi dosyası olarak ETİKET "
+#~ "gösterirlir\n"
+#~ "  -o, --only-matching       sadece satırın KALIPla eşleşen bölümü "
+#~ "gösterilir\n"
+#~ "  -q, --quiet, --silent     çıktı verilmez\n"
+#~ "      --binary-files=TÜR    ikilik dosyalar TÜR türünde varsayılır\n"
+#~ "                            TÜR: 'binary', 'text', ya da 'without-match'\n"
+#~ "  -a, --text                --binary-files=text ile aynı\n"
+#~ "  -I                        --binary-files=without-match ile aynı\n"
+#~ "  -d, --directories=EYLEM   dizinlerin ele alınma şekli\n"
+#~ "                            EYLEM: 'read', 'recurse', ya da 'skip'\n"
+#~ "  -D, --devices=EYLEM       aygıtların ele alınma şekli, FIFO ve "
+#~ "soketler\n"
+#~ "                            için EYLEM: 'read' ya da 'skip'\n"
+#~ "  -R, -r, --recursive       --directories=recurse ile aynı (ardışık)\n"
+#~ "      --include=KALIP       KALIP ile eşleşen dosyalar gösterilir\n"
+#~ "      --exclude=KALIP       KALIP ile eşleşen dosyalar atlanır\n"
+#~ "      --exclude-from=DOSYA  DOSYA içindeki dosyalardan KALIP ile "
+#~ "eşleşenler atlanır.\n"
+#~ "  -L, --files-without-match sadece eşleşmeyen DOSYA isimleri gösterilir\n"
+#~ "  -l, --files-with-matches  sadece eşleşen DOSYA isimleri gösterilir\n"
+#~ "  -c, --count               her DOSYAdaki eşleşen satır sayısı "
+#~ "gösterilir\n"
+#~ "  -Z, --null                DOSYA isminin arkasına null ekler\n"
+
+#~ msgid "unknown directories method"
+#~ msgstr "bilinmeyen dizin yöntemi"
+
+#~ msgid "%s (GNU grep) %s\n"
+#~ msgstr "%s (GNU grep) %s\n"
+
+#~ msgid ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+#~ msgstr ""
+#~ "Telif Hakkı 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions. There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "Bu serbest yazılımdır; kopyalama koşulları için kaynak koduna bakınız.\n"
+#~ "Hiçbir garantisi yoktur; hatta SATILABİLİRLİĞİ veya ŞAHSİ KULLANIMINIZA\n"
+#~ "UYGUNLUĞU için bile garanti verilmez.\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "-P ve -z seçenekleri birlikte olamaz"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: kuraldışı seçenek -- %c\n"
diff --git a/src/grep/po/uk.gmo b/src/grep/po/uk.gmo
new file mode 100644
index 0000000..3e9e1b6
--- /dev/null
+++ b/src/grep/po/uk.gmo
diff --git a/src/grep/po/uk.po b/src/grep/po/uk.po
new file mode 100644
index 0000000..3eeff84
--- /dev/null
+++ b/src/grep/po/uk.po
@@ -0,0 +1,772 @@
+# grep -- Ukrainian translation.
+# Copyright (C) 2003 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+#
+# Volodymyr M. Lisivka <lvm@mystery.lviv.net>, 2001-2002.
+# Dmytro O. Redchuk <dor@kiev-online.net>, 2002.
+# Yuri Chornoivan <yurchor@ukr.net>, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021.
+msgid ""
+msgstr ""
+"Project-Id-Version: grep-3.6.27\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-08-09 11:00+0300\n"
+"Last-Translator: Yuri Chornoivan <yurchor@ukr.net>\n"
+"Language-Team: Ukrainian <trans-uk@lists.fedoraproject.org>\n"
+"Language: uk\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"Plural-Forms: nplurals=1; plural=0;\n"
+"X-Generator: Lokalize 20.12.0\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "некоректний аргумент, %s, %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "неоднозначний аргумент, %s, %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Список коректних аргументів:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "помилка програми"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "переповнення стека"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "помилка запису"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "неврівноважена дужка ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "некоректний клас символів"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr ""
+"синтаксичну конструкцію класу символів слід визначати так: [[:space:]], а не "
+"так: [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "незавершена \\-послідовність"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "некоректний вміст \\{\\}"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "занадто об'ємний формальний вираз"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "неврівноважена дужка ("
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "не вказано синтаксис"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "неврівноважена дужка )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Невідома системна помилка"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: параметр «%s%s» не є однозначним\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: неоднозначний параметр «%s%s»; можливі варіанти:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: невідомий параметр «%s%s»\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: додавання аргументів до параметра «%s%s» не передбачено\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: параметр «%s%s» потребує аргументу\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: некоректний параметр — «%c»\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: до параметра слід додати аргумент — «%c»\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "пам'ять вичерпано"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "не вдалося зберегти поточний робочий каталог"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "не вдалося повернутись до початкового робочого каталогу"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr ""
+"не вдалося встановити текстовий або двійковий режим для дескриптора файла"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "«"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "»"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Успіх"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Не знайдено"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Помилка у формальному виразі"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Некоректний символ порівняння"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Некоректна назва класу символів"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Кінцевий символ похилої риски"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Некоректне зворотне посилання"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Незавершена послідовність [, [^, [:, [. або [="
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "Неврівноважена послідовність ( або \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "Неврівноважена послідовність \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Некоректний вміст \\{\\}"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Некоректне завершення діапазону"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Пам'ять вичерпано"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Помилка у попередньому формальному виразі"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Неочікуване завершення формального виразу"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Занадто об'ємний формальний вираз"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "Неврівноважена послідовність ) або \\)"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Не виявлено попереднього формального виразу"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Пакування — %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Пакування — %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Умови ліцензування викладено у GPLv3+: GNU GPL версії 3 або новішій, <%s>\n"
+"Це вільне програмне забезпечення: ви можете вільно змінювати і поширювати "
+"його.\n"
+"Вам не надається ЖОДНИХ ГАРАНТІЙ, окрім гарантій передбачених "
+"законодавством.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Автор — %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Автори: %s і %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Автори: %s, %s і %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Автори: %s, %s, %s\n"
+"і %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Автори: %s, %s, %s,\n"
+"%s і %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Автори: %s, %s, %s,\n"
+"%s, %s і %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Автори: %s, %s, %s,\n"
+"%s, %s, %s і %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Автори: %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"і %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Автори: %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s і %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Автори: %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s та інші.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "Повідомляйте про вади на адресу: %s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "Про вади у %s повідомляйте на адресу %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Домашня сторінка %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr ""
+"Загальна довідкова інформація щодо використання програмного забезпечення "
+"GNU: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(стандартне джерело вхідних даних)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "помилковий аргумент довжини контексту"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "вхідні дані занадто довгі для обліку"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s: двійковий файл містить збіжність"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s: попередження: зациклення рекурсивного проходу каталогів"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s: файл вхідних даних є також файлом вихідних даних"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Використання: %s [ПАРАМЕТР]... ШАБЛОНИ [ФАЙЛ]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Віддайте команду «%s --help», щоб дізнатися більше.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Шукати ШАБЛОНИ у кожному ФАЙЛі.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Приклад: %s -i 'hello world' menu.h main.c\n"
+"Запис ШАБЛОНИ може містити декілька шаблонів, які відокремлено символами "
+"нового рядка.\n"
+"\n"
+"Вибір за взірцем та інтерпретація:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     ШАБЛОНИ є розширеним формальним виразом\n"
+"  -F, --fixed-strings       ШАБЛОНИ є набором рядків\n"
+"  -G, --basic-regexp        ШАБЛОНИ є звичайними формальними виразами\n"
+"  -P, --perl-regexp         ШАБЛОНИ є формальними виразами Perl\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=ШАБЛОНИ      використовувати ШАБЛОНИ для встановлення "
+"відповідності\n"
+"  -f, --file=ФАЙЛ           взяти ШАБЛОНИ із ФАЙЛа\n"
+"  -i, --ignore-case         ігнорувати регістр літер у шаблонах і даних\n"
+"      --no-ignore-case      не ігнорувати регістр літер (типова поведінка)\n"
+"  -w, --word-regexp         шукати лише цілі слова\n"
+"  -x, --line-regexp         шукати лише цілі рядки\n"
+"  -z, --null-data           рядки даних закінчуються байтом \"0\", а не "
+"символом\n"
+"                            кінця рядка (\\n)\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Інше:\n"
+"  -s, --no-messages         придушити повідомлення про помилки\n"
+"  -v, --invert-match        вибирати рядки без збіжностей\n"
+"  -V, --version             показати дані щодо версії і завершити роботу\n"
+"      --help                показати ці довідкові дані і завершити роботу\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Керування виведенням даних:\n"
+"  -m, --max-count=ЧИСЛО     зупинитися після виявлення кількості рядків, що "
+"дорівнює ЧИСЛУ\n"
+"  -b, --byte-offset         показувати позиції у байтах разом з виведеними "
+"рядками\n"
+"  -n, --line-number         показувати номери рядків разом з виведеними "
+"рядками\n"
+"      --line-buffered       спорожняти буфер після виведення кожного рядка\n"
+"  -H, --with-filename       показувати для кожного рядка назву файла\n"
+"  -h, --no-filename         не показувати назв файлів у виведених даних\n"
+"      --label=МІТКА         показувати МІТКУ замість назви файла для "
+"стандартного джерела вхідних даних\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       показувати лише непорожні частини відповідних "
+"рядків\n"
+"  -q, --quiet, --silent     придушити виведення всіх звичайних даних\n"
+"      --binary-files=ТИП    припускати, що всі бінарні файли належать до "
+"ТИПу;\n"
+"                            ТИПом може бути `binary', `text' або `without-"
+"match'\n"
+"  -a, --text                те саме, що і --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        те саме, що і --binary-files=without-match\n"
+"  -d, --directories=ДІЯ     визначити спосіб обробки каталогів;\n"
+"                            ДІЄЮ може бути `read' (прочитати), `recurse'\n"
+"                            (обробити рекурсивно) або `skip' (пропустити)\n"
+"  -D, --devices=ДІЯ         визначити спосіб обробки файлів пристроїв, FIFO\n"
+"                            та сокетів;\n"
+"                            ДІЄЮ може бути `read' (прочитати) або `skip'\n"
+"                            (пропустити)\n"
+"  -r, --recursive           те саме, що і --directories=recurse\n"
+"  -R, --dereference-recursive  подібне, але з переходом за всіма "
+"символічними\n"
+"                            посиланнями\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=ВЗІРЕЦЬ     шукати лише у файлах, назви яких відповідають "
+"ВЗІРЦЮ\n"
+"      --exclude=ВЗІРЕЦЬ     не шукати у файлах, назви яких відповідають "
+"ВЗІРЦЮ\n"
+"      --exclude-from=ФАЙЛ   пропустити файли, назви яких відповідають будь-"
+"якому з шаблонів з ФАЙЛа\n"
+"      --exclude-dir=ВЗІРЕЦЬ пропустити каталоги, назви яких відповідають "
+"ВЗІРЦЮ.\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match показати назви лише тих файлів, у яких немає "
+"вибраних рядків\n"
+"  -l, --files-with-matches  показати назви лише тих файлів, у яких є вибрані "
+"рядки\n"
+"  -c, --count               показувати лише вказану кількість вибраних "
+"рядків на ФАЙЛ\n"
+"  -T, --initial-tab         вирівнювати результати табуляцією (якщо "
+"потрібно)\n"
+"  -Z, --null                вивести байти 0 після назви ФАЙЛа\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Керування контекстом:\n"
+"  -B, --before-context=ЧИСЛО показати ЧИСЛО рядків перед рядком з "
+"відповідником\n"
+"  -A, --after-context=ЧИСЛО  показати ЧИСЛО рядків після рядка з "
+"відповідником\n"
+"  -C, --context=ЧИСЛО        показати ЧИСЛО рядків контексту виведених "
+"даних\n"
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -ЧИСЛО                     те саме, що і --context=ЧИСЛО\n"
+"      --group-separator=РОЗД вивести символ РОЗД у рядку між відповідниками "
+"з контекстом\n"
+"      --no-group-separator   не виводити роздільник для відповідників із "
+"контекстом\n"
+"      --color[=ДЕ],\n"
+"      --colour[=ДЕ]          використовувати маркери для позначення\n"
+"                             рядків з відповідниками\n"
+"                             ДЕ може приймати значення \"always\", \"never\" "
+"чи \"auto\".\n"
+"  -U, --binary               не вилучати символи CR на кінці рядка (MSDOS/"
+"Windows)\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Якщо ФАЙЛом є «-», читати дані зі стандартного джерела вхідних\n"
+"даних. Якщо не вказано ФАЙЛ, читати «.», якщо режим рекурсивний, і\n"
+"«-», якщо ні. Якщо вказано менше ніж два ФАЙЛи, буде використано -h.\n"
+"Код завершення 0 — якщо було виявлено відповідник рядка,\n"
+"1 — коли їх нема, 2 — якщо сталася помилка і не було використано\n"
+"параметр -q.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "задані умови відповідності є суперечливими"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr ""
+"Підтримки встановлення відповідності за правилами Perl у збірках із --"
+"disable-perl-regexp не передбачено"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "некоректний вираз порівняння %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "невідомий спосіб обробки для пристроїв"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr "попередження: --unix-byte-offsets (-u) є застарілим параметром"
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "помилкова максимальна кількість"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "невідомий тип двійкових файлів"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Авторами програми є Mike Haertel та інші програмісти; див.\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "не вдалося отримати область пам’яті під стек JIT PCRE"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "у -P передбачено підтримку лише однобайтових локалей та UTF-8"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "аргументом параметра -P може бути лише один шаблон"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "внутрішня помилка (такої помилки не повинно було статися)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "перевищено обмеження на довжину рядка PCRE"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s: пам'ять вичерпано"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s: вичерпано стек JIT PCRE"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s: перевищено обмеження на зворотне стеження у PCRE"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s: перевищено обмеження на рекурсію у PCRE"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s: внутрішня помилка PCRE: %d"
diff --git a/src/grep/po/vi.gmo b/src/grep/po/vi.gmo
new file mode 100644
index 0000000..efc8028
--- /dev/null
+++ b/src/grep/po/vi.gmo
diff --git a/src/grep/po/vi.po b/src/grep/po/vi.po
new file mode 100644
index 0000000..6af0e1e
--- /dev/null
+++ b/src/grep/po/vi.po
@@ -0,0 +1,864 @@
+# Vietnamese Translation for Grep.
+# Bản dịch tiếng Việt dành cho Grep.
+# Copyright © 2016 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+# Clytie Siddall <clytie@riverland.net.au>, 2005-2010.
+# Trần Ngọc Quân <vnwildman@gmail.com>, 2012-2014, 2015, 2016, 2017, 2018.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 3.3.42\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2020-01-04 15:02+0700\n"
+"Last-Translator: Trần Ngọc Quân <vnwildman@gmail.com>\n"
+"Language-Team: Vietnamese <translation-team-vi@lists.sourceforge.net>\n"
+"Language: vi\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"Plural-Forms: nplurals=1; plural=0;\n"
+"X-Generator: Poedit 2.2.4\n"
+"X-Poedit-SourceCharset: UTF-8\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "đối số %s không hợp lệ đối với %s"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "đối số %s không rõ ràng đối với %s"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "Các đối số hợp lệ là:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "lỗi chương trình"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "tràn ngăn xếp"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "lỗi ghi"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "thiếu dấu ngoặc vuông mở ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "sai lớp ký tự"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "cú pháp lớp ký tự là [[:space:]], không phải [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "chưa kết thúc thoát chuỗi \\"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "nội dung của \\{\\} không hợp lệ"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "biểu thức chính quy quá lớn"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "thiếu dấu ngoặc đơn mở ("
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "chưa đưa ra cú pháp"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "thiếu dấu ngoặc đơn đóng )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "Lỗi hệ thống không rõ"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s: tùy chọn “%s%s” chưa rõ ràng\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s: tùy chọn “%s%s” chưa rõ ràng; khả năng là:"
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s: không nhận ra tùy chọn “%s%s”\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s: tùy chọn “%s%s” không không cho phép một đối số\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s: tùy chọn “%s%s” cần một đối số\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: tùy chọn không hợp lệ -- “%c”\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: tùy chọn yêu cầu một đối số -- “%c”\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "hết bộ nhớ"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "không thể ghi nhớ được thư mục làm việc hiện thời"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "gặp lỗi khi quay trở về thư mục làm việc khởi đầu"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "gặp lỗi khi đặt chế độ văn bản/nhị phân cho bộ mô tả tập tin"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "“"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "”"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "Thành công"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "Không tìm thấy"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "Biểu thức chính quy không hợp lệ"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "Ký tự đối chiếu không hợp lệ"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "Tên lớp ký tự không hợp lệ"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "Dấu gạch ngược theo sau"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "Tham chiếu ngược không hợp lệ"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "Có ký tự [, [^, [:, [., hay [= lẻ cặp"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "Có ký tự “(” hay “\\(” lẻ cặp"
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "Có ký tự “\\{” lẻ cặp"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "Nội dung của \\{\\} không hợp lệ"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "Sai kết thúc phạm vi"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "Hết bộ nhớ"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "Biểu thức chính quy có trước không hợp lệ"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "Biểu thức chính quy kết thức quá sớm"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "Biểu thức chính quy quá lớn"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "Có ký tự “)” hay “\\)” lẻ cặp"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "Không có biểu thức chính quy nằm trước"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "Đóng gói bởi %s (%s)\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "Đóng gói bởi %s\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"Giấy phép GPL pb3+ : Giấy phép Công cộng GNU phiên bản 3 hay sau <%s>.\n"
+"Đây là phần mềm tự do: bạn có quyền sửa đổi và phát hành lại nó.\n"
+"KHÔNG CÓ BẢO HÀNH GÌ CẢ, với điều kiện được pháp luật cho phép.\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "Viết bởi %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "Viết bởi %s và %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "Viết bởi %s, %s và %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Viết bởi %s, %s, %s\n"
+"và %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Viết bởi %s, %s, %s,\n"
+"%s và %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"Viết bởi %s, %s, %s,\n"
+"%s, %s và %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"Viết bởi %s, %s, %s,\n"
+"%s, %s, %s và %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"Viết bởi %s, %s, %s,\n"
+"%s, %s, %s, %s\n"
+"và %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"Viết bởi %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s và %s.\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"Viết bởi %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s và một số người khác.\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr ""
+"Hãy thông báo lỗi cho: %s\n"
+"Hãy thông báo lỗi dịch cho <http://translationproject.org/team/vi.html>.\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr ""
+"Hãy thông các báo lỗi %s cho: %s\n"
+"Hãy thông báo lỗi dịch cho <http://translationproject.org/team/vi.html>.\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "Trang chủ của %s: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "Trợ giúp chung về cách sử dụng phần mềm GNU: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(đầu vào tiêu chuẩn)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "đối số chiều dài ngữ cảnh không hợp lệ"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "dữ liệu đầu vào quá lớn nên không thể đếm được"
+
+#: src/grep.c:1641
+#, fuzzy, c-format
+msgid "%s: binary file matches"
+msgstr "Tập tin nhị phân “%s” khớp mẫu tìm kiếm\n"
+
+#: src/grep.c:1679
+#, fuzzy, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "vòng lặp thư mục đệ quy"
+
+#: src/grep.c:1899
+#, fuzzy, c-format
+msgid "%s: input file is also the output"
+msgstr "tập tin đầu vào “%s” cũng là kết xuất"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "Cách dùng: %s [TÙY_CHỌN]… MẪU [TẬP_TIN]…\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "Hãy chạy lệnh “%s --help” để biết thêm thông tin.\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "Tìm kiếm MẪU trong từng TẬP_TIN.\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"Ví dụ: %s -i \"chào thế giới\" menu.h main.c\n"
+"MẪU có thể chứa nhiều mẫu ngăn cách nhau bằng ký tự dòng mới.\n"
+"\n"
+"Chọn và biên dịch mẫu:\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     MẪU là các biểu thức chính quy mở rộng\n"
+"  -F, --fixed-strings       MẪU là các chuỗi\n"
+"  -G, --basic-regexp        MẪU là các biểu thức chính quy cơ bản\n"
+"  -P, --perl-regexp         MẪU là các biểu thức chính quy Perl\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=MẪU          dùng MẪU để so khớp\n"
+"  -f, --file=TẬP_TIN        lấy MẪU từ TẬP_TIN\n"
+"  -i, --ignore-case         không phân biệt HOA/thường trong mẫu và dữ liệu\n"
+"      --no-ignore-case      phân biệt HOA/thường (mặc định)\n"
+"  -w, --word-regexp         chỉ khớp toàn bộ từ\n"
+"  -x, --line-regexp         chỉ khớp toàn bộ dòng\n"
+"  -z, --null-data           một dòng dữ liệu kết thúc bằng byte 0,\n"
+"                            không phải ký tự dòng mới\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"Hỗn tạp:\n"
+"  -s, --no-messages         chặn các thông báo lỗi\n"
+"  -v, --invert-match        chọn các dòng không khớp\n"
+"  -V, --version             in ra thông tin phiên bản rồi thoát\n"
+"      --help                hiển thị trợ giúp này rồi thoát\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"Điều khiển kết xuất:\n"
+"  -m, --max-count=SỐ        dừng sau khi khớp được SỐ lần\n"
+"  -b, --byte-offset         in ra vị trí tương đối tính theo byte\n"
+"                              cùng với dòng kết xuất\n"
+"  -n, --line-number         in ra số thứ tự dòng cùng với dòng kết xuất\n"
+"      --line-buffered       xóa sạch kết xuất trên từng dòng\n"
+"  -H, --with-filename       in ra tên tập tin cho từng dòng đầu ra\n"
+"  -h, --no-filename         chặn tiền tố tên tập tin khi xuất\n"
+"      --label=NHÃN          sử dụng NHÃN này làm tiền tố cho tập tin\n"
+"                              cho đầu ra tiêu chuẩn\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       chỉ hiển thị phần dòng không rỗng khớp với MẪU\n"
+"  -q, --quiet, --silent     chặn mọi kết xuất bình thường\n"
+"      --binary-files=KIỂU   coi rằng tập tin nhị phân có KIỂU:\n"
+"                                  * “binary”         nhị phân\n"
+"                                  * “text”           dạng chữ\n"
+"                                  * “without-match”  không khớp\n"
+"  -a, --text                giống với tùy chọn “--binary-files=text”\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        giống với “--binary-files=without-match”\n"
+"  -d, --directories=HÀNH_VI cách quản lý các thư mục. HÀNH_VI là:\n"
+"                                  * “read”     đọc\n"
+"                                  * “recurse”  đệ quy\n"
+"                                  * “skip”     bỏ qua\n"
+"  -D, --devices=HÀNH_VI     cách quản lý các thiết bị, FIFO và socket;\n"
+"                            HÀNH_VI:\n"
+"                                  * “read”     đọc\n"
+"                                  * “skip”     bỏ qua\n"
+"  -r, --recursive           giống với tùy chọn “--directories=recurse”\n"
+"  -R, --dereference-recursive  cũng vậy nhưng cho phép cả các liên kết mềm\n"
+
+#: src/grep.c:2023
+#, fuzzy, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=GLOB        chỉ tìm kiếm những tập tin khớp với GLOB (mẫu "
+"tập tin)\n"
+"      --exclude=GLOB        bỏ qua những tập tin và thư mục khớp với GLOB\n"
+"      --exclude-from=TỆP    bỏ qua những tập tin khớp với bất cứ mẫu tập\n"
+"                             tin trong tập tin này\n"
+"      --exclude-dir=GLOB    thư mục nào khớp với mẫu này thì bị bỏ qua\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match  chỉ in ra tên của các TẬP TIN không khớp mẫu\n"
+"  -l, --files-with-matches  chỉ in ra tên của các TẬP TIN khớp mẫu\n"
+"  -c, --count               chỉ in ra số lượng dòng khớp trong mỗi TẬP TIN\n"
+"  -T, --initial-tab         sắp hàng cột tab (nếu cần)\n"
+"  -Z, --null                in ra byte 0 (null) đằng sau tên TẬP TIN\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"Điều khiển ngữ cảnh:\n"
+"  -B, --before-context=SỐ   in ra SỐ dòng ngữ cảnh đi trước\n"
+"  -A, --after-context=SỐ    in ra SỐ dòng ngữ cảnh đi sau\n"
+"  -C, --context=SỐ          in ra SỐ dòng ngữ cảnh kết xuất\n"
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NUM                      giống với “--context=SỐ”\n"
+"      --color[=KHI],\n"
+"      --colour[=KHI]        đánh dấu để tô sáng các chuỗi khớp; KHI là:\n"
+"                                 * “always” luôn luôn\n"
+"                                 * “never”  không bao giờ\n"
+"                                 * “auto”   tự động\n"
+"  -U, --binary              đừng gỡ bỏ các ký tự CR ở kết thúc dòng (EOL)\n"
+"                            (MSDOS/Windows)\n"
+"\n"
+
+#: src/grep.c:2052
+#, fuzzy, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"Khi TẬP_TIN là “-”, thì đọc từ đầu vào tiêu chuẩn. Không có TẬP_TIN, đọc “.” "
+"nếu\n"
+"đệ quy, “-” nếu không phải vậy. Nếu ít hơn hai TẬP_TIN thì coi là “-h”.\n"
+"Trạng thái thoát là 0 nếu có dòng (hay tập tin nếu -L) nào khớp mẫu, không "
+"thì bằng 1;\n"
+"nếu có lỗi phát sinh và “-q” không được đưa ra thì trạng thái thoát là 2.\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "đã ghi rõ dữ liệu khớp mà xung đột"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr "Không hỗ trợ khớp mẫu perl khi biên dịch với --disable-perl-regexp"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "sai mẫu so khớp %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "không rõ phương thức thiết bị"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "số lượng tối đa không hợp lệ"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "không rõ kiểu tập tin nhị phân (binary-files)"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"Được viết bởi Mike Haertel và nhiều người khác, xem tại\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "gặp lỗi khi cấp phát bộ nhớ cho stack (ngăn xếp) PCRE JIT"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P chỉ hỗ trợ miền địa phương unibyte và UTF-8"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "tùy chọn “-P” chỉ hỗ trợ một mẫu đơn lẻ"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "lỗi nội bộ (không nên xảy ra như thế)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "đã vượt quá giới hạn chiều dài dòng của PCRE"
+
+#: src/pcresearch.c:306
+#, fuzzy, c-format
+msgid "%s: memory exhausted"
+msgstr "hết bộ nhớ"
+
+#: src/pcresearch.c:310
+#, fuzzy, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "ngăn xếp “PCRE JIT” đã hết"
+
+#: src/pcresearch.c:315
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "đã vượt quá giới hạn tìm ngược của PCRE"
+
+#: src/pcresearch.c:319
+#, fuzzy, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "đã vượt quá giới hạn tìm ngược của PCRE"
+
+#: src/pcresearch.c:327
+#, fuzzy, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "lỗi nội bộ PCRE: %d"
+
+#, c-format
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr ""
+#~ "cảnh báo: GREP_OPTIONS đã lỗi thời; vui lòng dòng một bí danh hoặc văn "
+#~ "lệnh"
+
+#, c-format
+#~ msgid "warning: %s: %s"
+#~ msgstr "cảnh báo: %s: %s"
+
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "Trang chủ %s: <https://www.gnu.org/software/%s/>\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "đối số %s%s không hợp lệ “%s”"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "hậu tố không hợp lệ trong %s%s đối số “%s”"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "%s%s đối số “%s” quá lớn"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "internal error"
+#~ msgstr "lỗi nội bộ"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: tùy chọn “--%s” không cho phép có đối số\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: không nhận ra tùy chọn “--%s”\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: tùy chọn “-W %s” chưa rõ ràng\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: tùy chọn “-W %s” không cho phép đối số\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: tùy chọn “-W %s” yêu cầu một đối số\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "lseek gặp lỗi"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "MẪU, theo mặc định, là một biểu thức chính quy cơ bản (BRE).\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "“egrep” nên là “grep -E”, “fgrep” nên là “grep -F”.\n"
+#~ "Không tán thành gọi trực tiếp “egrep” cũng như “fgrep”.\n"
+
+#~ msgid "unescaped ^ or $ not supported with -Pz"
+#~ msgstr "không thoát ^ hay $ không được hỗ trợ với -Pz"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "Trang chủ của GNU Grep: <%s>\n"
+
+#~ msgid "invalid UTF-8 byte sequence in input"
+#~ msgstr "chuỗi byte UTF-8 không hợp lệ ở đầu vào"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "MẪU là một biểu thức chính quy mở rộng (ERE).\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr "Không tán thành việc gọi như “egrep” nên thay thế bằng “grep -E”.\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr ""
+#~ "MẪU là một tập hợp các chuỗi cố định phân cách bằng ký tự dòng mới.\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr "Không tán thành việc gọi như “fgrep” nên thay thế bằng “grep -F”.\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s chỉ có khả năng sử dụng cú pháp mẫu %s"
+
+#~ msgid "the --mmap option has been a no-op since 2010"
+#~ msgstr "tùy chọn --mmap không còn được thực thi kể từ năm 2010"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "chưa kết thúc sự đếm lặp lại"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "sự đếm lặp lại dạng sai"
+
+#~ msgid "writing output"
+#~ msgstr "đang ghi kết xuất"
+
+#~ msgid ""
+#~ "in GREP_COLORS='%s', the `%s' capacity needs a value ('=...'); skipped"
+#~ msgstr ""
+#~ "trong chuỗi “GREP_COLORS=“%s”, khả năng “%s” cần giá trị (“=…”); nên bỏ "
+#~ "qua"
+
+#~ msgid ""
+#~ "in GREP_COLORS='%s', the `%s' capacity is boolean and cannot take a value "
+#~ "('=%s'); skipped"
+#~ msgstr ""
+#~ "trong chuỗi “GREP_COLORS=“%s”, khả năng “%s” là luận lý thì không chấp "
+#~ "nhận được giá trị (“=%s”); nên bỏ qua"
+
+#~ msgid "in GREP_COLORS='%s', the `%s' capacity %s"
+#~ msgstr "trong GREP_COLORS=“%s”, khả năng “%s” %s"
+
+#~ msgid ""
+#~ "stopped processing of ill-formed GREP_COLORS='%s' at remaining substring `"
+#~ "%s'"
+#~ msgstr ""
+#~ "đã dừng xử lý chuỗi GREP_COLORS=“%s” dạng sai ở chuỗi con còn lại “%s”"
diff --git a/src/grep/po/zh_CN.gmo b/src/grep/po/zh_CN.gmo
new file mode 100644
index 0000000..946eb07
--- /dev/null
+++ b/src/grep/po/zh_CN.gmo
diff --git a/src/grep/po/zh_CN.po b/src/grep/po/zh_CN.po
new file mode 100644
index 0000000..b9559ee
--- /dev/null
+++ b/src/grep/po/zh_CN.po
@@ -0,0 +1,912 @@
+# Simplified Chinese(zh_CN) messages for grep.
+# This file is distributed under the same license as the grep package.
+# Copyright (C) 2008 Free Software Foundation, Inc.
+# Ji ZhengYu <zhengyuji@gmail.com>, 2016.
+# Boyuan Yang <073plan@gmail.com>, 2018, 2019, 2020.
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 3.5.16\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2020-11-04 09:09-0500\n"
+"Last-Translator: Boyuan Yang <073plan@gmail.com>\n"
+"Language-Team: Chinese (simplified) <i18n-zh@googlegroups.com>\n"
+"Language: zh_CN\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"X-Generator: Poedit 2.4.1\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "%2$s 的参数 %1$s 无效"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "%2$s 的参数 %1$s 有歧义"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "有效参数是:"
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "程序错误"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "栈溢出"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "写错误"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "有未匹配的 ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "无效的字符类名"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "字符类的语法是 [[:space:]],而非 [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "未做好 \\ 转义"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "\\{\\}中内容无效"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "正则表达式太长"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "有未匹配的 ("
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "未指定语法"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "有未匹配的 )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "未知的系统错误"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s：选项“%s%s”有歧义\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s：选项“%s%s”有歧义；可能原因："
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s：无法识别的选项“%s%s”\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s：选项“%s%s”不允许带参数\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s：选项“%s%s”需要一个参数\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s：无效选项 -- “%c”\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s：选项需要一个参数 -- “%c”\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "内存耗尽"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "无法记录当前工作目录"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "无法返回起始工作目录"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "设置文件描述符文本/二进制模式失败"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "‘"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "’"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "成功"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "无匹配"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "无效的正则表达式"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "无效的冲突字符"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "无效的字符类名"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "多余的反斜杠"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "无效的回退索引"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "[, [^, [:, [.或[= 不匹配"
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "( 或 \\( 不匹配"
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "\\{ 不匹配"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "\\{\\} 中的内容无效"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "无效的结束地址"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "内存耗尽"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "之前的正则表达式无效"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "正则表达式非正常结束"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "正则表达式太大"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr ") 或 \\) 不匹配"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "没有之前的正则表达式"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "由 %s (%s) 打包\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "由 %s 打包\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "©"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"GPLv3+ 许可证: GNU 通用公共许可证第三版或更高版本 <%s>。\n"
+"这是自由软件: 您可自由更改并重新分发它。\n"
+"在法律所允许的范围内，不附带任何担保条款。\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "作者 %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "作者 %s 和 %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "作者 %s, %s 及 %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"作者 %s, %s, %s,\n"
+"及 %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"作者 %s, %s, %s,\n"
+"%s, 及 %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"作者 %s, %s, %s,\n"
+"%s, %s, 及 %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"作者 %s, %s, %s,\n"
+"%s, %s, %s, 及 %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"作者 %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"及 %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"作者 %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, 及 %s。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"作者 %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, 以及其他人。\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "请将错误报告给：%s。翻译问题请报告至 <i18n-zh@googlegroups.com>。\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "请将 %s 错误报告给: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "%s 主页: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "GNU 软件的通用帮助: <%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "（标准输入）"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "无效的文本长度参数"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "输入太多无法计数"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s：匹配到二进制文件"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s：警告：嵌套目录循环"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s：输入文件同时也作为输出"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "用法: %s [选项]... 模式 [文件]...\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "尝试使用 '%s --help' 来获得更多信息。\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "在每个<文件>中查找给定<模式>。\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"例如：%s -i 'hello world' menu.h main.c\n"
+"<模式>可以包括多个模式字符串，使用换行符进行分隔。\n"
+"\n"
+"模式选择与解释：\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     <模式> 是扩展正则表达式\n"
+"  -F, --fixed-strings       <模式> 是字符串\n"
+"  -G, --basic-regexp        <模式> 是基本正则表达式\n"
+"  -P, --perl-regexp         <模式> 是 Perl 正则表达式\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=<模式>       用指定的<模式>字符串来进行匹配操作\n"
+"  -f, --file=<文件>         从给定<文件>中取得<模式>\n"
+"  -i, --ignore-case         在模式和数据中忽略大小写\n"
+"      --no-ignore-case      不要忽略大小写（默认）\n"
+"  -w, --word-regexp         强制<模式>仅完全匹配字词\n"
+"  -x, --line-regexp         强制<模式>仅完全匹配整行\n"
+"  -z, --null-data           数据行以一个 0 字节结束，而非换行符\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"杂项:\n"
+"  -s, --no-messages         不显示错误信息\n"
+"  -v, --invert-match        选中不匹配的行\n"
+"  -V, --version             显示版本信息并退出\n"
+"      --help                显示此帮助并退出\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"输出控制：\n"
+"  -m, --max-count=<次数>    得到给定<次数>次匹配后停止\n"
+"  -b, --byte-offset         输出的同时打印字节偏移\n"
+"  -n, --line-number         输出的同时打印行号\n"
+"      --line-buffered       每行输出后刷新输出缓冲区\n"
+"  -H, --with-filename       为输出行打印文件名\n"
+"  -h, --no-filename         输出时不显示文件名前缀\n"
+"      --label=<标签>        将给定<标签>作为标准输入文件名前缀\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       只显示行中非空匹配部分\n"
+"  -q, --quiet, --silent     不显示所有常规输出\n"
+"      --binary-files=TYPE   设定二进制文件的 TYPE（类型）；\n"
+"                            TYPE 可以是 'binary'、'text' 或 'without-match'\n"
+"  -a, --text                等同于 --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        等同于 --binary-files=without-match\n"
+"  -d, --directories=ACTION  读取目录的方式；\n"
+"                            ACTION 可以是`read', `recurse',或`skip'\n"
+"  -D, --devices=ACTION      读取设备、先入先出队列、套接字的方式；\n"
+"                            ACTION 可以是`read'或`skip'\n"
+"  -r, --recursive           等同于--directories=recurse\n"
+"  -R, --dereference-recursive       同上，但遍历所有符号链接\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=GLOB        只查找匹配 GLOB（文件模式）的文件\n"
+"      --exclude=GLOB        跳过匹配 GLOB 的文件\n"
+"      --exclude-from=FILE   跳过所有匹配给定文件内容中任意模式的文件\n"
+"      --exclude-dir=GLOB    跳过所有匹配 GLOB 的目录\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match  只打印没有匹配上的<文件>的名称\n"
+"  -l, --files-with-matches  只打印有匹配的<文件>的名称\n"
+"  -c, --count               只打印每个<文件>中的匹配行数目\n"
+"  -T, --initial-tab         行首制表符对齐（如有必要）\n"
+"  -Z, --null                在<文件>名最后打印空字符\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"文件控制:\n"
+"  -B, --before-context=NUM  打印文本及其前面NUM 行\n"
+"  -A, --after-context=NUM   打印文本及其后面NUM 行\n"
+"  -C, --context=NUM         打印NUM 行输出文本\n"
+
+#: src/grep.c:2043
+#, fuzzy, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NUM                      等同于 --context=NUM\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       使用标记高亮匹配字串；\n"
+"                            WHEN 可以是“always”、“never”或“auto”\n"
+"  -U, --binary              不要清除行尾的 CR 字符（MSDOS/Windows）\n"
+"\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"若给定文件为“-”，则从读取标准输入。  若无文件参数，则除非处于\n"
+"递归工作模式视为从“.”读取之外，一律视为从“-”读取。如果提供了少于\n"
+"两个文件参数，则默认启用 -h 选项。如果有任意行被匹配则退出状态为 0，\n"
+"否则为 1；如果有错误产生且未指定 -q 参数，则退出状态为 2。\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "指定了互相冲突的比较程序"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr "当前使用了 --disable-perl-regexp 的构建无法支持 Perl 匹配模式"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "无效匹配 %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "未知的设备处理方式"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr ""
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "无效的最大计数"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "未知的二进制文件类型"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"由 Mike Haerhtel 等人编写；作者信息请参见\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>。"
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "为 PCRE JIT 栈分配内存时出错"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P 仅支持单字节及 UTF-8 语言环境"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "-P 选项仅支持单一匹配字词"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "内部错误（永远不应该发生）"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "超过 PCRE 的行长度限制"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s：内存耗尽"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s：PCRE JIT 栈已经用尽"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s：超过 PCRE 的回溯限制"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s：超过 PCRE 的递归限制"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s：PCRE 内部错误：%d"
+
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr "警告: GREP_OPTIONS 已被废弃；请使用别名或脚本"
+
+#~ msgid "warning: %s: %s"
+#~ msgstr "警告: %s: %s"
+
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "%s 主页: <https://www.gnu.org/software/%s/>\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "无效的 %s%s 参数'%s'"
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "%s%s 参数'%s' 的后缀无效"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "%s%s 参数“%s”过大"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "internal error"
+#~ msgstr "内部错误"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: 选项'--%s' 不允许带参数\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: 未知选项'--%s' \n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: 选项'-W %s' 有歧义\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: 选项'-W %s' 不允许带参数\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: 选项'-W %s' 必须带参数\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "lseek 失败"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "默认的 PATTERN 是一个基本正则表达式(缩写为 BRE)。\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "'egrep' 即'grep -E'。'fgrep' 即'grep -F'。\n"
+#~ "直接调用'egrep' 或是'fgrep' 均已被废弃。\n"
+
+#~ msgid "unescaped ^ or $ not supported with -Pz"
+#~ msgstr "-Pz 不支持未经转义的字符^ 或$"
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "PATTERN 是一个可扩展的正则表达式(缩写为 ERE)。\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr "‘egrep’已不再使用了；请用‘grep -E’代替。\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr "PATTERN 是一组由断行符分隔的定长字符串。\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr "‘fgrep’已不再使用了；请用 ‘grep -F’代替。\n"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "GNU Grep 主页: <%s>\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s 只能使用 %s 匹配语法"
+
+#~ msgid "the --mmap option has been a no-op since 2010"
+#~ msgstr "--mmap 选项从2010 年起已不再是操作符了"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "未定义重复次数"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "重复次数定义地不完整"
+
+#~ msgid "writing output"
+#~ msgstr "正在写输出"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity needs a value (\"=...\"); "
+#~ "skipped"
+#~ msgstr ""
+#~ "在 GREP_COLORS=\"%s\"中， \"%s\" 需要指定一个值(\"=...\")；已忽略此参数。"
+
+#~ msgid ""
+#~ "in GREP_COLORS=\"%s\", the \"%s\" capacity is boolean and cannot take a "
+#~ "value (\"=%s\"); skipped"
+#~ msgstr ""
+#~ "在 GREP_COLORS=\"%s\"中，\"%s\" 要的是一个 boolean(布尔值) 不是一个数值"
+#~ "(\"=%s\")；已忽略此参数。"
+
+#~ msgid "in GREP_COLORS=\"%s\", the \"%s\" capacity %s"
+#~ msgstr "在 GREP_COLORS=\"%s\"中，\"%s\" 是 %s。"
+
+#~ msgid ""
+#~ "stopped processing of ill-formed GREP_COLORS=\"%s\" at remaining "
+#~ "substring \"%s\""
+#~ msgstr "在余下的子串 \"%2$s\" 中停止处理格式有误的 GREP_COLORS=\"%1$s\"。"
+
+#~ msgid "unknown directories method"
+#~ msgstr "未知的目录处理方法"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE;\n"
+#~ "                            TYPE is `binary', `text', or `without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories;\n"
+#~ "                            ACTION is `read', `recurse', or `skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+#~ "                            ACTION is `read' or `skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=FILE_PATTERN  search only files that match FILE_PATTERN\n"
+#~ "      --exclude=FILE_PATTERN  skip files and directories matching "
+#~ "FILE_PATTERN\n"
+#~ "      --exclude-from=FILE   skip files matching any file pattern from "
+#~ "FILE\n"
+#~ "      --exclude-dir=PATTERN directories that match PATTERN will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match print only names of FILEs containing no "
+#~ "match\n"
+#~ "  -l, --files-with-matches  print only names of FILEs containing matches\n"
+#~ "  -c, --count               print only a count of matching lines per "
+#~ "FILE\n"
+#~ "  -T, --initial-tab         make tabs line up (if needed)\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "输出控制:\n"
+#~ "  -m, --max-count=NUM       NUM 次匹配后停止\n"
+#~ "  -b, --byte-offset         显示输出行的字节偏移\n"
+#~ "  -n, --line-number         显示输出行的行号\n"
+#~ "      --line-buffered       每行都清空输出\n"
+#~ "  -H, --with-filename       为每个匹配打印出文件名\n"
+#~ "  -h, --no-filename         输出时不显示文件名前的路径名\n"
+#~ "      --label=LABEL         打印 LABEL 作为标准输入的文件名\n"
+#~ "  -o, --only-matching       仅显示匹配 PATTERN 的那一行\n"
+#~ "  -q, --quiet, --silent     不显示所有普通信息\n"
+#~ "      --binary-files=TYPE   假定二进制文件类型为 TYPE;\n"
+#~ "                            TYPE 可以是‘binary’，‘text’或是‘without-"
+#~ "match’\n"
+#~ "  -a, --text                等同于 --binary-files=text\n"
+#~ "  -I                        等同于 --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  如何处理目录名；\n"
+#~ "                            ACTION 是‘read’，‘recurse’或是‘skip’\n"
+#~ "  -D, --devices=ACTION      如何处理设备名，FIFOs(队列) 以及 sockets(套接"
+#~ "字)\n"
+#~ "                            ACTION 是‘read’或是‘skip’\n"
+#~ "  -R, -r, --recursive       等同于 --directories=recurse\n"
+#~ "      --include=FILE_PATTERN  仅查找匹配 FILE_PATTERN 的文件\n"
+#~ "      --exclude=FILE_PATTERN  忽略匹配 FILE_PATTERN 的文件和目录\n"
+#~ "      --exclude-from=FILE   忽略任何来自 FILE 的匹配字词\n"
+#~ "      --exclude-dir=PATTERN 忽略匹配 PATTERN 的目录。\n"
+#~ "  -L, --files-without-match 仅显示不包含匹配字词的 FILE 名称\n"
+#~ "  -l, --files-with-matches  仅显示包含匹配字词的 FILE 名称\n"
+#~ "  -c, --count               仅显示每个 FILE 中匹配行的数目\n"
+#~ "  -T, --initial-tab         以 tab 为行首(如果必要的话)\n"
+#~ "  -Z, --null                在 FILE 后打印 0 字节\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "-P 和 -z 选项不能组合使用"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s: 非法选项 -- %c\n"
+
+#~ msgid "Copyright (C) 2008 Free Software Foundation, Inc.\n"
+#~ msgstr "Copyright (C) 2008 Free Software Foundation, Inc.\n"
diff --git a/src/grep/po/zh_TW.gmo b/src/grep/po/zh_TW.gmo
new file mode 100644
index 0000000..edaf898
--- /dev/null
+++ b/src/grep/po/zh_TW.gmo
diff --git a/src/grep/po/zh_TW.po b/src/grep/po/zh_TW.po
new file mode 100644
index 0000000..4a64d87
--- /dev/null
+++ b/src/grep/po/zh_TW.po
@@ -0,0 +1,918 @@
+# Traditional Chinese Translation of grep.
+# Copyright (C) 2004, 2012, 2013, 2016, 2018, 2021 Free Software Foundation, Inc.
+# This file is distributed under the same license as the grep package.
+#
+# Yuan-Chen Cheng <ycheng@sinica.edu.tw>, 2004.
+# Webber Liao <wpliao@gmail.com>, 2012, 2016.
+# Wei-Lun Chao <bluebat@member.fsf.org>, 2013.
+# pan93412 <pan93412@gmail.com>, 2018, 2019, 2020, 2021.
+msgid ""
+msgstr ""
+"Project-Id-Version: grep 3.6.27\n"
+"Report-Msgid-Bugs-To: bug-grep@gnu.org\n"
+"POT-Creation-Date: 2021-08-14 12:54-0700\n"
+"PO-Revision-Date: 2021-08-10 02:06+0800\n"
+"Last-Translator: Yi-Jyun Pan <pan93412@gmail.com>\n"
+"Language-Team: Chinese (traditional) <zh-l10n@lists.linux.org.tw>\n"
+"Language: zh_TW\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Bugs: Report translation errors to the Language-Team address.\n"
+"Plural-Forms: nplurals=1; plural=0;\n"
+"X-Generator: Poedit 3.0\n"
+
+#: lib/argmatch.c:132
+#, c-format
+msgid "invalid argument %s for %s"
+msgstr "%2$s 的引數 %1$s 無效"
+
+#: lib/argmatch.c:133
+#, c-format
+msgid "ambiguous argument %s for %s"
+msgstr "%2$s 的引數 %1$s 不明確"
+
+#: lib/argmatch.c:152 lib/argmatch.h:223
+msgid "Valid arguments are:"
+msgstr "有效的引數為："
+
+#: lib/c-stack.c:187
+msgid "program error"
+msgstr "程式錯誤"
+
+#: lib/c-stack.c:188
+msgid "stack overflow"
+msgstr "堆疊超出容量"
+
+#: lib/closeout.c:122 src/grep.c:1336
+msgid "write error"
+msgstr "寫入發生錯誤"
+
+#: lib/dfa.c:896
+msgid "unbalanced ["
+msgstr "不對稱的 ["
+
+#: lib/dfa.c:1017
+msgid "invalid character class"
+msgstr "無效的字元類別"
+
+#: lib/dfa.c:1143
+msgid "character class syntax is [[:space:]], not [:space:]"
+msgstr "字元類別的語法為 [[:space:]], 非 [:space:]"
+
+#: lib/dfa.c:1210
+msgid "unfinished \\ escape"
+msgstr "不完整的 \\ 逸出"
+
+#: lib/dfa.c:1371
+msgid "invalid content of \\{\\}"
+msgstr "\\{\\} 的內容無效"
+
+#: lib/dfa.c:1374
+msgid "regular expression too big"
+msgstr "正規表示式過長"
+
+#: lib/dfa.c:1858
+msgid "unbalanced ("
+msgstr "不對稱的 ("
+
+#: lib/dfa.c:1975
+msgid "no syntax specified"
+msgstr "沒有指定的語法"
+
+#: lib/dfa.c:1986
+msgid "unbalanced )"
+msgstr "不對稱的 )"
+
+#: lib/error.c:195
+msgid "Unknown system error"
+msgstr "未知的系統錯誤"
+
+#: lib/getopt.c:278
+#, c-format
+msgid "%s: option '%s%s' is ambiguous\n"
+msgstr "%s：選項「%s%s」不明確\n"
+
+#: lib/getopt.c:284
+#, c-format
+msgid "%s: option '%s%s' is ambiguous; possibilities:"
+msgstr "%s：選項「%s%s」不明確；可能選項為："
+
+#: lib/getopt.c:319
+#, c-format
+msgid "%s: unrecognized option '%s%s'\n"
+msgstr "%s：無法識別的選項「%s%s」\n"
+
+#: lib/getopt.c:345
+#, c-format
+msgid "%s: option '%s%s' doesn't allow an argument\n"
+msgstr "%s：「%s%s」選項不接受引數\n"
+
+#: lib/getopt.c:360
+#, c-format
+msgid "%s: option '%s%s' requires an argument\n"
+msgstr "%s：「%s%s」選項需要個引數\n"
+
+#: lib/getopt.c:621
+#, c-format
+msgid "%s: invalid option -- '%c'\n"
+msgstr "%s: 無效的選項 -- \"%c\"\n"
+
+#: lib/getopt.c:636 lib/getopt.c:682
+#, c-format
+msgid "%s: option requires an argument -- '%c'\n"
+msgstr "%s: 選項需要一個引數 -- \"%c\"\n"
+
+#: lib/obstack.c:337 lib/obstack.c:339 lib/xalloc-die.c:34
+msgid "memory exhausted"
+msgstr "記憶體用盡"
+
+#: lib/openat-die.c:38
+#, c-format
+msgid "unable to record current working directory"
+msgstr "無法記錄現行工作目錄"
+
+#: lib/openat-die.c:57
+#, c-format
+msgid "failed to return to initial working directory"
+msgstr "無法返回原本的工作目錄"
+
+#: lib/xbinary-io.c:37
+#, c-format
+msgid "failed to set file descriptor text/binary mode"
+msgstr "無法設定檔案描述符號的文字/二進位模式"
+
+#. TRANSLATORS:
+#. Get translations for open and closing quotation marks.
+#. The message catalog should translate "`" to a left
+#. quotation mark suitable for the locale, and similarly for
+#. "'".  For example, a French Unicode local should translate
+#. these to U+00AB (LEFT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE
+#. QUOTATION MARK), respectively.
+#.
+#. If the catalog has no translation, we will try to
+#. use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and
+#. Unicode U+2019 (RIGHT SINGLE QUOTATION MARK).  If the
+#. current locale is not Unicode, locale_quoting_style
+#. will quote 'like this', and clocale_quoting_style will
+#. quote "like this".  You should always include translations
+#. for "`" and "'" even if U+2018 and U+2019 are appropriate
+#. for your locale.
+#.
+#. If you don't know what to put here, please see
+#. <https://en.wikipedia.org/wiki/Quotation_marks_in_other_languages>
+#. and use glyphs suitable for your language.
+#: lib/quotearg.c:355
+msgid "`"
+msgstr "`"
+
+#: lib/quotearg.c:356
+msgid "'"
+msgstr "'"
+
+#: lib/regcomp.c:135
+msgid "Success"
+msgstr "成功"
+
+#: lib/regcomp.c:138
+msgid "No match"
+msgstr "沒有符合的項目"
+
+#: lib/regcomp.c:141
+msgid "Invalid regular expression"
+msgstr "無效的正規表示式"
+
+#: lib/regcomp.c:144
+msgid "Invalid collation character"
+msgstr "無效的對照字元"
+
+#: lib/regcomp.c:147
+msgid "Invalid character class name"
+msgstr "無效的字元類別名"
+
+#: lib/regcomp.c:150
+msgid "Trailing backslash"
+msgstr "末端有反斜線"
+
+#: lib/regcomp.c:153
+msgid "Invalid back reference"
+msgstr "無效的向後引用"
+
+#: lib/regcomp.c:156
+msgid "Unmatched [, [^, [:, [., or [="
+msgstr "沒有對應的 [，[^，[:，[. 或 [="
+
+#: lib/regcomp.c:159
+msgid "Unmatched ( or \\("
+msgstr "沒有對應的 ( 或 \\("
+
+#: lib/regcomp.c:162
+msgid "Unmatched \\{"
+msgstr "沒有對應的 \\{"
+
+#: lib/regcomp.c:165
+msgid "Invalid content of \\{\\}"
+msgstr "無效的 \\{\\} 內容"
+
+#: lib/regcomp.c:168
+msgid "Invalid range end"
+msgstr "無效的結束範圍"
+
+#: lib/regcomp.c:171
+msgid "Memory exhausted"
+msgstr "記憶體用盡"
+
+#: lib/regcomp.c:174
+msgid "Invalid preceding regular expression"
+msgstr "無效的前置正規表示式"
+
+#: lib/regcomp.c:177
+msgid "Premature end of regular expression"
+msgstr "正規表示式過早結束"
+
+#: lib/regcomp.c:180
+msgid "Regular expression too big"
+msgstr "正規表示式過長"
+
+#: lib/regcomp.c:183
+msgid "Unmatched ) or \\)"
+msgstr "沒有對應的 ) 或 \\)"
+
+#: lib/regcomp.c:676
+msgid "No previous regular expression"
+msgstr "沒有先前的正規表示式"
+
+#: lib/version-etc.c:73
+#, c-format
+msgid "Packaged by %s (%s)\n"
+msgstr "套件由 %s (%s) 所打包\n"
+
+#: lib/version-etc.c:76
+#, c-format
+msgid "Packaged by %s\n"
+msgstr "套件由 %s 所打包\n"
+
+#. TRANSLATORS: Translate "(C)" to the copyright symbol
+#. (C-in-a-circle), if this symbol is available in the user's
+#. locale.  Otherwise, do not translate "(C)"; leave it as-is.
+#: lib/version-etc.c:83
+msgid "(C)"
+msgstr "(C)"
+
+#. TRANSLATORS: The %s placeholder is the web address of the GPL license.
+#: lib/version-etc.c:88
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <%s>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+"授權條款 GPLv3+：GNU GPL 第 3 版或更新版 <%s>。\n"
+"這是自由軟體：您可自由修改或散布。\n"
+"在法律准許範圍內不附帶保證。\n"
+
+#. TRANSLATORS: %s denotes an author name.
+#: lib/version-etc.c:105
+#, c-format
+msgid "Written by %s.\n"
+msgstr "由 %s 編寫。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:109
+#, c-format
+msgid "Written by %s and %s.\n"
+msgstr "由 %s 和 %s 編寫。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#: lib/version-etc.c:113
+#, c-format
+msgid "Written by %s, %s, and %s.\n"
+msgstr "由 %s、%s 和 %s 編寫。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:120
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"由 %s、%s、%s、\n"
+"和 %s 編寫。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:127
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"由 %s、%s、%s、\n"
+"%s 和 %s 編寫。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:134
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, and %s.\n"
+msgstr ""
+"由 %s、%s、%s、\n"
+"%s、%s 和 %s 編寫。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:142
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, and %s.\n"
+msgstr ""
+"由 %s、%s、%s、\n"
+"%s、%s、%s 和 %s 編寫。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:150
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"and %s.\n"
+msgstr ""
+"由 %s、%s、%s、\n"
+"%s、%s、%s、%s、\n"
+"和 %s 編寫。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:159
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, and %s.\n"
+msgstr ""
+"由 %s、%s、%s、\n"
+"%s、%s、%s、%s、\n"
+"%s 和 %s 編寫。\n"
+
+#. TRANSLATORS: Each %s denotes an author name.
+#. You can use line breaks, estimating that each author name occupies
+#. ca. 16 screen columns and that a screen line has ca. 80 columns.
+#: lib/version-etc.c:170
+#, c-format
+msgid ""
+"Written by %s, %s, %s,\n"
+"%s, %s, %s, %s,\n"
+"%s, %s, and others.\n"
+msgstr ""
+"由 %s、%s、%s、\n"
+"%s、%s、%s、%s、\n"
+"%s 和 %s 等人編寫。\n"
+
+#. TRANSLATORS: The placeholder indicates the bug-reporting address
+#. for this package.  Please add _another line_ saying
+#. "Report translation bugs to <...>\n" with the address for translation
+#. bugs (typically your translation team's web or email address).
+#: lib/version-etc.c:249
+#, c-format
+msgid "Report bugs to: %s\n"
+msgstr "回報臭蟲至：%s\n"
+
+#: lib/version-etc.c:251
+#, c-format
+msgid "Report %s bugs to: %s\n"
+msgstr "回報 %s bug 到: %s\n"
+
+#: lib/version-etc.c:255 lib/version-etc.c:257
+#, c-format
+msgid "%s home page: <%s>\n"
+msgstr "%s 首頁: <%s>\n"
+
+#: lib/version-etc.c:260
+#, c-format
+msgid "General help using GNU software: <%s>\n"
+msgstr "GNU 軟體用法的一般說明：<%s>\n"
+
+#: src/grep.c:649
+msgid "(standard input)"
+msgstr "(標準輸入)"
+
+#: src/grep.c:829
+msgid "invalid context length argument"
+msgstr "無效的內容列數值"
+
+#: src/grep.c:894
+msgid "input is too large to count"
+msgstr "輸入過長無法計數"
+
+#: src/grep.c:1641
+#, c-format
+msgid "%s: binary file matches"
+msgstr "%s：二進位檔案符合"
+
+#: src/grep.c:1679
+#, c-format
+msgid "%s: warning: recursive directory loop"
+msgstr "%s：警告：目錄重複遞迴"
+
+#: src/grep.c:1899
+#, c-format
+msgid "%s: input file is also the output"
+msgstr "%s：輸入檔亦為輸出對象"
+
+#: src/grep.c:1961 src/grep.c:1968
+#, c-format
+msgid "Usage: %s [OPTION]... PATTERNS [FILE]...\n"
+msgstr "用法: %s [選項]… PATTERNS [檔案]…\n"
+
+#: src/grep.c:1963
+#, c-format
+msgid "Try '%s --help' for more information.\n"
+msgstr "請使用 \"%s --help\" 以閱讀更多的資訊。\n"
+
+#: src/grep.c:1969
+#, c-format
+msgid "Search for PATTERNS in each FILE.\n"
+msgstr "在每個檔案中尋找 PATTERNS。\n"
+
+#: src/grep.c:1970
+#, c-format
+msgid ""
+"Example: %s -i 'hello world' menu.h main.c\n"
+"PATTERNS can contain multiple patterns separated by newlines.\n"
+"\n"
+"Pattern selection and interpretation:\n"
+msgstr ""
+"範例：%s -i 'hello world' menu.h main.c\n"
+"PATTERNS 也可以包含多個以換行符號分隔的形樣。\n"
+"\n"
+"形樣 (Pattern) 選擇與解釋：\n"
+
+#: src/grep.c:1975
+#, c-format
+msgid ""
+"  -E, --extended-regexp     PATTERNS are extended regular expressions\n"
+"  -F, --fixed-strings       PATTERNS are strings\n"
+"  -G, --basic-regexp        PATTERNS are basic regular expressions\n"
+"  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"
+msgstr ""
+"  -E, --extended-regexp     PATTERNS 是一個延伸正則表示式\n"
+"  -F, --fixed-strings       PATTERNS 是一個字串\n"
+"  -G, --basic-regexp        PATTERNS 是一個基本正則表示式\n"
+"  -P, --perl-regexp         PATTERNS 是一個 Perl 正規表示式\n"
+
+#: src/grep.c:1981
+#, c-format
+msgid ""
+"  -e, --regexp=PATTERNS     use PATTERNS for matching\n"
+"  -f, --file=FILE           take PATTERNS from FILE\n"
+"  -i, --ignore-case         ignore case distinctions in patterns and data\n"
+"      --no-ignore-case      do not ignore case distinctions (default)\n"
+"  -w, --word-regexp         match only whole words\n"
+"  -x, --line-regexp         match only whole lines\n"
+"  -z, --null-data           a data line ends in 0 byte, not newline\n"
+msgstr ""
+"  -e, --regexp=模式         使用 <模式> 比對\n"
+"  -f, --file=檔案           自 <檔案> 取得 <模式>\n"
+"  -i, --ignore-case         忽略模式及資料的大小寫差異\n"
+"      --no-ignore-case      不允許忽略大小寫差異 (預設值)\n"
+"  -w, --word-regexp         僅比較整個單字\n"
+"  -x, --line-regexp         僅比較整行\n"
+"  -z, --null-data           設定資料列結尾為空白位元組，非換列符號\n"
+
+#: src/grep.c:1989
+#, c-format
+msgid ""
+"\n"
+"Miscellaneous:\n"
+"  -s, --no-messages         suppress error messages\n"
+"  -v, --invert-match        select non-matching lines\n"
+"  -V, --version             display version information and exit\n"
+"      --help                display this help text and exit\n"
+msgstr ""
+"\n"
+"雜項:\n"
+"  -s, --no-messages         抑制錯誤訊息\n"
+"  -v, --invert-match        選取不符合的列\n"
+"  -V, --version             印出版本資訊然後結束\n"
+"      --help                顯示此說明然後結束\n"
+
+#: src/grep.c:1996
+#, c-format
+msgid ""
+"\n"
+"Output control:\n"
+"  -m, --max-count=NUM       stop after NUM selected lines\n"
+"  -b, --byte-offset         print the byte offset with output lines\n"
+"  -n, --line-number         print line number with output lines\n"
+"      --line-buffered       flush output on every line\n"
+"  -H, --with-filename       print file name with output lines\n"
+"  -h, --no-filename         suppress the file name prefix on output\n"
+"      --label=LABEL         use LABEL as the standard input file name "
+"prefix\n"
+msgstr ""
+"\n"
+"輸出控制：\n"
+"  -m, --max-count=NUM       在第 NUM 選取列後停止\n"
+"  -b, --byte-offset         印出每個輸出列的位元組偏移量\n"
+"  -n, --line-number         印出每個輸出列的列號\n"
+"      --line-buffered       輸出每列後清除輸出\n"
+"  -H, --with-filename       印出輸出列的檔案名稱\n"
+"  -h, --no-filename         抑制輸出列的檔名前綴\n"
+"      --label=LABEL         以 LABEL 作標準輸入的檔名前綴\n"
+
+#: src/grep.c:2007
+#, c-format
+msgid ""
+"  -o, --only-matching       show only nonempty parts of lines that match\n"
+"  -q, --quiet, --silent     suppress all normal output\n"
+"      --binary-files=TYPE   assume that binary files are TYPE;\n"
+"                            TYPE is 'binary', 'text', or 'without-match'\n"
+"  -a, --text                equivalent to --binary-files=text\n"
+msgstr ""
+"  -o, --only-matching       只顯示相符行中的非空白部份\n"
+"  -q, --quiet, --silent     抑制全部常態的輸出\n"
+"      --binary-files=TYPE   設定二進制檔案為 TYPE 的檔案;\n"
+"                            TYPE 可為 \"binary\"、\"text\" 或 \"without-match"
+"\"\n"
+"  -a, --text                等同於 --binary-files=text\n"
+
+#: src/grep.c:2014
+#, c-format
+msgid ""
+"  -I                        equivalent to --binary-files=without-match\n"
+"  -d, --directories=ACTION  how to handle directories;\n"
+"                            ACTION is 'read', 'recurse', or 'skip'\n"
+"  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n"
+"                            ACTION is 'read' or 'skip'\n"
+"  -r, --recursive           like --directories=recurse\n"
+"  -R, --dereference-recursive  likewise, but follow all symlinks\n"
+msgstr ""
+"  -I                        等同於 --binary-files=without-matc\n"
+"  -d, --directories=ACTION  檔案目錄的處理方式;\n"
+"                            ACTION 為 \"read\"、\"recurse\" 或 \"skip\"\n"
+"  -D, --devices=ACTION      裝置、FIFO 和通訊端的處理方式;\n"
+"                            ACTION 為 \"read\" 或 \"skip\"\n"
+"  -R, -r, --recursive       等同於 --directories=recurse\n"
+
+#: src/grep.c:2023
+#, c-format
+msgid ""
+"      --include=GLOB        search only files that match GLOB (a file "
+"pattern)\n"
+"      --exclude=GLOB        skip files that match GLOB\n"
+"      --exclude-from=FILE   skip files that match any file pattern from "
+"FILE\n"
+"      --exclude-dir=GLOB    skip directories that match GLOB\n"
+msgstr ""
+"      --include=GLOB       只搜尋符合 GLOB (一種檔案模式) 的檔案\n"
+"      --exclude=GLOB       跳過符合 GLOB 的檔案\n"
+"      --exclude-from=檔案  跳過符合 <檔案> 中任何檔案模式的檔案\n"
+"      --exclude-dir=GLOB   跳過符合 GLOB 的資料夾。\n"
+
+#: src/grep.c:2030
+#, c-format
+msgid ""
+"  -L, --files-without-match  print only names of FILEs with no selected "
+"lines\n"
+"  -l, --files-with-matches  print only names of FILEs with selected lines\n"
+"  -c, --count               print only a count of selected lines per FILE\n"
+"  -T, --initial-tab         make tabs line up (if needed)\n"
+"  -Z, --null                print 0 byte after FILE name\n"
+msgstr ""
+"  -L, --files-without-match  只印出未選取行的 檔案 名稱\n"
+"  -l, --files-with-matches  只印出選取行的 檔案 名稱\n"
+"  -c, --count               只印出每個 檔案 的選取行項目\n"
+"  -T, --initial-tab         (需要時) 對齊 Tab 符號\n"
+"  -Z, --null                在 檔案 名稱後印出空白位元組\n"
+
+#: src/grep.c:2036
+#, c-format
+msgid ""
+"\n"
+"Context control:\n"
+"  -B, --before-context=NUM  print NUM lines of leading context\n"
+"  -A, --after-context=NUM   print NUM lines of trailing context\n"
+"  -C, --context=NUM         print NUM lines of output context\n"
+msgstr ""
+"\n"
+"內容控制:\n"
+"  -B, --before-context=NUM  印出 NUM 列的前文\n"
+"  -A, --after-context=NUM   印出 NUM 列的後文\n"
+"  -C, --context=NUM         印出 NUM 列的內容\n"
+
+#: src/grep.c:2043
+#, c-format
+msgid ""
+"  -NUM                      same as --context=NUM\n"
+"      --group-separator=SEP  print SEP on line between matches with context\n"
+"      --no-group-separator  do not print separator for matches with context\n"
+"      --color[=WHEN],\n"
+"      --colour[=WHEN]       use markers to highlight the matching strings;\n"
+"                            WHEN is 'always', 'never', or 'auto'\n"
+"  -U, --binary              do not strip CR characters at EOL (MSDOS/"
+"Windows)\n"
+"\n"
+msgstr ""
+"  -NUM                      等同於 --context=NUM\n"
+"      --group-separator=SEP 在上一個和下一個符合結果和鄰近列 (context) 之間輸"
+"出 SEP 分隔字串\n"
+"      --no-group-separator  不要在上一個和下一個符合結果和鄰近列之間輸出分隔"
+"字串\n"
+"      --color[=WHEN]，\n"
+"      --colour[=WHEN]       用特殊顏色標示符合字串;\n"
+"                            WHEN 為「always」、「never」或「auto」\n"
+"  -U, --binary              不要刪除列尾 CR 字元 (MSDOS/Windows)\n"
+
+#: src/grep.c:2052
+#, c-format
+msgid ""
+"When FILE is '-', read standard input.  With no FILE, read '.' if\n"
+"recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n"
+"Exit status is 0 if any line is selected, 1 otherwise;\n"
+"if any error occurs and -q is not given, the exit status is 2.\n"
+msgstr ""
+"如果 <檔案> 為「-」，則讀取標準輸入資料。 當沒有指定 <檔案> 時，如果使用遞迴"
+"模式，\n"
+"則讀取「.」否則讀取「-」。當指定的 <檔案> 數目少於兩個時，則假設是 -h。\n"
+"如果有選到任何一列，則回傳結束狀態 0，否則回傳 1；\n"
+"如果發生任何錯誤且沒有傳入 -q 選項，結束狀態則為 2。\n"
+
+#: src/grep.c:2094
+msgid "conflicting matchers specified"
+msgstr "指定了互相衝突的配對選項"
+
+#: src/grep.c:2101
+msgid "Perl matching not supported in a --disable-perl-regexp build"
+msgstr "--disable-perl-regexp 組建不支援 Perl 比對"
+
+#: src/grep.c:2103
+#, c-format
+msgid "invalid matcher %s"
+msgstr "無效的配對選項 %s"
+
+#: src/grep.c:2538
+msgid "unknown devices method"
+msgstr "未知的裝置方法"
+
+#: src/grep.c:2580
+#, c-format
+msgid "warning: --unix-byte-offsets (-u) is obsolete"
+msgstr "警告：--unix-byte-offsets (-u) 已經廢棄"
+
+#: src/grep.c:2686
+msgid "invalid max count"
+msgstr "無效的最大計次"
+
+#: src/grep.c:2744
+msgid "unknown binary-files type"
+msgstr "未知的二進位檔案類別"
+
+#: src/grep.c:2829
+msgid ""
+"Written by Mike Haertel and others; see\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."
+msgstr ""
+"由 Mike Haertel 及其他人撰寫而成；請見\n"
+"<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>。"
+
+#: src/pcresearch.c:85
+msgid "failed to allocate memory for the PCRE JIT stack"
+msgstr "為 PCRE JIT 堆疊分配記憶體時出現錯誤"
+
+#: src/pcresearch.c:137
+msgid "-P supports only unibyte and UTF-8 locales"
+msgstr "-P 只支援單位元組和 UTF-8 編碼"
+
+#: src/pcresearch.c:143
+msgid "the -P option only supports a single pattern"
+msgstr "-P 選項只支援單一樣式"
+
+#: src/pcresearch.c:187
+msgid "internal error (should never happen)"
+msgstr "內部錯誤 (不應該出現這個錯誤)"
+
+#: src/pcresearch.c:230
+msgid "exceeded PCRE's line length limit"
+msgstr "已超過 PCRE 的字數上限"
+
+#: src/pcresearch.c:306
+#, c-format
+msgid "%s: memory exhausted"
+msgstr "%s：已用盡記憶體"
+
+#: src/pcresearch.c:310
+#, c-format
+msgid "%s: exhausted PCRE JIT stack"
+msgstr "%s：已用盡 PCRE JIT 堆疊"
+
+#: src/pcresearch.c:315
+#, c-format
+msgid "%s: exceeded PCRE's backtracking limit"
+msgstr "%s：已超過 PCRE 的回溯上限"
+
+#: src/pcresearch.c:319
+#, c-format
+msgid "%s: exceeded PCRE's recursion limit"
+msgstr "%s：超過 PCRE 的遞迴上限"
+
+#: src/pcresearch.c:327
+#, c-format
+msgid "%s: internal PCRE error: %d"
+msgstr "%s：內部 PCRE 錯誤: %d"
+
+#~ msgid "warning: GREP_OPTIONS is deprecated; please use an alias or script"
+#~ msgstr "警告：已經廢除 GREP_OPTIONS；請使用別名或文稿"
+
+#~ msgid "warning: %s: %s"
+#~ msgstr "警告: %s: %s"
+
+#~ msgid "%s home page: <https://www.gnu.org/software/%s/>\n"
+#~ msgstr "%s 首頁：<https://www.gnu.org/software/%s/>\n"
+
+#~ msgid "invalid %s%s argument '%s'"
+#~ msgstr "無效 %s%s 引數 \"%s\""
+
+#~ msgid "invalid suffix in %s%s argument '%s'"
+#~ msgstr "%s%s 引數 \"%s\" 中有無效的尾綴"
+
+#~ msgid "%s%s argument '%s' too large"
+#~ msgstr "%s%s 引數 \"%s\" 過大"
+
+#~ msgid "Mike Haertel"
+#~ msgstr "Mike Haertel"
+
+#~ msgid "internal error"
+#~ msgstr "內部錯誤"
+
+#~ msgid "%s: option '--%s' doesn't allow an argument\n"
+#~ msgstr "%s: 選項 \"--%s\" 不接受引數\n"
+
+#~ msgid "%s: unrecognized option '--%s'\n"
+#~ msgstr "%s: 未知的選項 \"--%s\"\n"
+
+#~ msgid "%s: option '-W %s' is ambiguous\n"
+#~ msgstr "%s: 選項 \"-W %s\" 不明確\n"
+
+#~ msgid "%s: option '-W %s' doesn't allow an argument\n"
+#~ msgstr "%s: 選項 \"-W %s\" 不接受引數\n"
+
+#~ msgid "%s: option '-W %s' requires an argument\n"
+#~ msgstr "%s: 選項 \"-W %s\" 需要一個引數\n"
+
+#~ msgid "lseek failed"
+#~ msgstr "lseek 失敗"
+
+#~ msgid "PATTERN is, by default, a basic regular expression (BRE).\n"
+#~ msgstr "PATTERN 原則上是一個基本正規表示式 (BRE)。\n"
+
+#~ msgid ""
+#~ "'egrep' means 'grep -E'.  'fgrep' means 'grep -F'.\n"
+#~ "Direct invocation as either 'egrep' or 'fgrep' is deprecated.\n"
+#~ msgstr ""
+#~ "\"egrep\" 等同於 \"grep -E\".  \"fgrep\" 等同於 \"grep -F\"。\n"
+#~ "直接呼叫 \"egrep\" 或 \"fgrep\" 的做法已被廢除。\n"
+
+#~ msgid "unescaped ^ or $ not supported with -Pz"
+#~ msgstr "-Pz 不支援未逸出的 ^ 或 $ "
+
+#~ msgid "PATTERN is an extended regular expression (ERE).\n"
+#~ msgstr "PATTERN 是一個延伸正規表示式 (ERE)。\n"
+
+#~ msgid "Invocation as 'egrep' is deprecated; use 'grep -E' instead.\n"
+#~ msgstr "\"egrep\" 的呼叫方式已被廢除; 請用 \"grep -E\" 代替。\n"
+
+#~ msgid "PATTERN is a set of newline-separated fixed strings.\n"
+#~ msgstr "PATTERN 是一組以換列分隔開的固定字串。\n"
+
+#~ msgid "Invocation as 'fgrep' is deprecated; use 'grep -F' instead.\n"
+#~ msgstr "\"fgrep\" 的呼叫方式已被廢除; 請用 \"grep -F\" 代替。\n"
+
+#~ msgid "GNU Grep home page: <%s>\n"
+#~ msgstr "GNU Grep 首頁: <%s>\n"
+
+#~ msgid "%s can only use the %s pattern syntax"
+#~ msgstr "%s 只能使用 %s 樣式的語法"
+
+#~ msgid "the --mmap option has been a no-op since 2010"
+#~ msgstr "--mmap 選項自 2010 年起已經沒有任何效用"
+
+#~ msgid "unfinished repeat count"
+#~ msgstr "未完成的重複計次"
+
+#~ msgid "malformed repeat count"
+#~ msgstr "格式錯誤的重複次數"
+
+#~ msgid "out of memory"
+#~ msgstr "記憶體用盡"
+
+#~ msgid "writing output"
+#~ msgstr "正在輸出"
+
+#~ msgid "Usage: %s [OPTION]... PATTERN [FILE] ...\n"
+#~ msgstr "用法: %s [選項]… 樣板 [檔案]…\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Output control:\n"
+#~ "  -m, --max-count=NUM       stop after NUM matches\n"
+#~ "  -b, --byte-offset         print the byte offset with output lines\n"
+#~ "  -n, --line-number         print line number with output lines\n"
+#~ "      --line-buffered       flush output on every line\n"
+#~ "  -H, --with-filename       print the filename for each match\n"
+#~ "  -h, --no-filename         suppress the prefixing filename on output\n"
+#~ "      --label=LABEL         print LABEL as filename for standard input\n"
+#~ "  -o, --only-matching       show only the part of a line matching "
+#~ "PATTERN\n"
+#~ "  -q, --quiet, --silent     suppress all normal output\n"
+#~ "      --binary-files=TYPE   assume that binary files are TYPE\n"
+#~ "                            TYPE is 'binary', 'text', or 'without-match'\n"
+#~ "  -a, --text                equivalent to --binary-files=text\n"
+#~ "  -I                        equivalent to --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  how to handle directories\n"
+#~ "                            ACTION is 'read', 'recurse', or 'skip'\n"
+#~ "  -D, --devices=ACTION      how to handle devices, FIFOs and sockets\n"
+#~ "                            ACTION is 'read' or 'skip'\n"
+#~ "  -R, -r, --recursive       equivalent to --directories=recurse\n"
+#~ "      --include=PATTERN     files that match PATTERN will be examined\n"
+#~ "      --exclude=PATTERN     files that match PATTERN will be skipped.\n"
+#~ "      --exclude-from=FILE   files that match PATTERN in FILE will be "
+#~ "skipped.\n"
+#~ "  -L, --files-without-match only print FILE names containing no match\n"
+#~ "  -l, --files-with-matches  only print FILE names containing matches\n"
+#~ "  -c, --count               only print a count of matching lines per "
+#~ "FILE\n"
+#~ "  -Z, --null                print 0 byte after FILE name\n"
+#~ msgstr ""
+#~ "\n"
+#~ "輸出控制:\n"
+#~ "  -m, --max-count=NUM       在顯示 NUM 個結果後停止\n"
+#~ "  -b, --byte-offset         只顯示合乎條件資料以 byte 為記數單位的位置\n"
+#~ "  -n, --line-number         只顯示合乎條件的行列編號\n"
+#~ "      --line-buffered       每一列輸出後都立即顯示\n"
+#~ "  -H, --with-filename       每列結果都印出檔案名稱\n"
+#~ "  -h, --no-filename         輸出時不顯示前置的檔案名稱\n"
+#~ "      --label=LABEL         對於標準輸入, 在顯示檔名處顯示 LABEL\n"
+#~ "  -o, --only-matching       只顯示一列資料中與樣板條件相符的部分\n"
+#~ "  -q, --quiet, --silent     關閉所有一般輸出的\n"
+#~ "      --binary-files=TYPE   設定二進位檔案型別為 TYPE\n"
+#~ "                            TYPE 是 'binary', 'text', 或 'without-match' "
+#~ "之一\n"
+#~ "  -a, --text                等同於 --binary-files=text\n"
+#~ "  -I                        等同於 --binary-files=without-match\n"
+#~ "  -d, --directories=ACTION  處理目錄的方式\n"
+#~ "                            ACTION 是 'read', 'recurse', 或 'skip' 之一\n"
+#~ "  -D, --devices=ACTION      處理裝置檔案, FIFO 以及 socket 的方式\n"
+#~ "                            ACTION 是 'read' 或 'skip'之一\n"
+#~ "  -R, -r, --recursive       等同於 --directories=recurse\n"
+#~ "      --include=PATTERN     檔名與 PATTERN 相符的將會被檢驗\n"
+#~ "      --exclude=PATTERN     檔名與 PATTERN 相符的將會被略過\n"
+#~ "      --exclude-from=FILE   檔名與 FILE 檔案中的 PATTERN 相符的將會被略"
+#~ "過\n"
+#~ "  -L, --files-without-match 只列出找不到相符的檔案名稱\n"
+#~ "  -l, --files-with-matches  只列出有發現與樣板相符的檔案\n"
+#~ "  -c, --count               只針對每的檔案列出該檔案相符個數\n"
+#~ "  -Z, --null                在檔名之後輸出一個值為 0 的位元\n"
+
+#~ msgid ""
+#~ "\n"
+#~ "Report bugs to <bug-gnu-utils@gnu.org>.\n"
+#~ msgstr ""
+#~ "\n"
+#~ "請將發現的錯誤，以電子郵件寄到 <bug-gnu-utils@gnu.org>\n"
+
+#~ msgid "unknown directories method"
+#~ msgstr "未知的目錄方法"
+
+#~ msgid "%s (GNU grep) %s\n"
+#~ msgstr "%s (GNU grep) %s\n"
+
+#~ msgid ""
+#~ "Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.\n"
+#~ msgstr "版權所有 1988, 1992-1999, 2000, 2001 自由軟體基金會.\n"
+
+#~ msgid ""
+#~ "This is free software; see the source for copying conditions. There is "
+#~ "NO\n"
+#~ "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR "
+#~ "PURPOSE.\n"
+#~ msgstr ""
+#~ "這個程式是自由軟體; 請參閱其版權條款. 此軟體沒有\n"
+#~ "沒有任何保証; 也沒有任何保証它使用於某一特定目的.\n"
+
+#~ msgid "The -P and -z options cannot be combined"
+#~ msgstr "參數 -P 以及 參數 -z 並不能結合使用"
+
+#~ msgid "%s: illegal option -- %c\n"
+#~ msgstr "%s; 不適用的選項 -- %c\n"
diff --git a/src/grep/src/Makefile.am b/src/grep/src/Makefile.am
new file mode 100644
index 0000000..c2e6e9a
--- /dev/null
+++ b/src/grep/src/Makefile.am
@@ -0,0 +1,70 @@
+## Process this file with automake to create Makefile.in
+# Copyright 1997-1998, 2005-2021 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+LN = ln
+
+AM_CFLAGS = $(WARN_CFLAGS) $(WERROR_CFLAGS) $(PCRE_CFLAGS)
+
+# Tell the linker to omit references to unused shared libraries.
+AM_LDFLAGS = $(IGNORE_UNUSED_LIBRARIES_CFLAGS)
+
+bin_PROGRAMS = grep
+bin_SCRIPTS = egrep fgrep
+grep_SOURCES =					\
+  dfasearch.c					\
+  die.h						\
+  grep.c					\
+  kwsearch.c					\
+  kwset.c					\
+  searchutils.c
+if USE_PCRE
+grep_SOURCES += pcresearch.c
+endif
+
+noinst_HEADERS = grep.h kwset.h search.h system.h
+
+# Sometimes, the expansion of $(LIBINTL) includes -lc which may
+# include modules defining variables like 'optind', so libgreputils.a
+# must precede $(LIBINTL) in order to ensure we use GNU getopt.
+# But libgreputils.a must also follow $(LIBINTL), since libintl uses
+# replacement functions defined in libgreputils.a.
+LDADD = \
+  ../lib/libgreputils.a $(LIBINTL) ../lib/libgreputils.a $(LIBICONV) \
+  $(LIBTHREAD)
+
+grep_LDADD = $(LDADD) $(PCRE_LIBS) $(LIBCSTACK)
+localedir = $(datadir)/locale
+AM_CPPFLAGS = -I$(top_builddir)/lib -I$(top_srcdir)/lib
+
+EXTRA_DIST = egrep.sh
+
+egrep fgrep: egrep.sh Makefile
+	$(AM_V_GEN)grep=`echo grep | sed -e '$(transform)'` &&		\
+	case $@ in egrep) option=-E;; fgrep) option=-F;; esac &&	\
+	shell_does_substrings='set x/y && d=$${1%/*} && test "$$d" = x' && \
+	if $(SHELL) -c "$$shell_does_substrings" 2>/dev/null; then	\
+	  edit_substring='s,X,X,';					\
+	else								\
+	  edit_substring='s,\$${0%/\*},`expr "X$$0" : '\''X\\(.*\\)/'\''`,g'; \
+	fi &&								\
+	sed -e 's|[@]SHELL@|$(SHELL)|g'					\
+	    -e "$$edit_substring"					\
+	    -e "s|[@]grep@|$$grep|g"					\
+	    -e "s|[@]option@|$$option|g" <$(srcdir)/egrep.sh >$@-t
+	$(AM_V_at)chmod +x $@-t
+	$(AM_V_at)mv $@-t $@
+
+CLEANFILES = egrep fgrep *-t
diff --git a/src/grep/src/Makefile.in b/src/grep/src/Makefile.in
new file mode 100644
index 0000000..668b484
--- /dev/null
+++ b/src/grep/src/Makefile.in
@@ -0,0 +1,2031 @@
+# Makefile.in generated by automake 1.16d from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+# Copyright 1997-1998, 2005-2021 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+
+
+VPATH = @srcdir@
+am__is_gnu_make = { \
+  if test -z '$(MAKELEVEL)'; then \
+    false; \
+  elif test -n '$(MAKE_HOST)'; then \
+    true; \
+  elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+    true; \
+  else \
+    false; \
+  fi; \
+}
+am__make_running_with_option = \
+  case $${target_option-} in \
+      ?) ;; \
+      *) echo "am__make_running_with_option: internal error: invalid" \
+              "target option '$${target_option-}' specified" >&2; \
+         exit 1;; \
+  esac; \
+  has_opt=no; \
+  sane_makeflags=$$MAKEFLAGS; \
+  if $(am__is_gnu_make); then \
+    sane_makeflags=$$MFLAGS; \
+  else \
+    case $$MAKEFLAGS in \
+      *\\[\ \	]*) \
+        bs=\\; \
+        sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \
+          | sed "s/$$bs$$bs[$$bs $$bs	]*//g"`;; \
+    esac; \
+  fi; \
+  skip_next=no; \
+  strip_trailopt () \
+  { \
+    flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \
+  }; \
+  for flg in $$sane_makeflags; do \
+    test $$skip_next = yes && { skip_next=no; continue; }; \
+    case $$flg in \
+      *=*|--*) continue;; \
+        -*I) strip_trailopt 'I'; skip_next=yes;; \
+      -*I?*) strip_trailopt 'I';; \
+        -*O) strip_trailopt 'O'; skip_next=yes;; \
+      -*O?*) strip_trailopt 'O';; \
+        -*l) strip_trailopt 'l'; skip_next=yes;; \
+      -*l?*) strip_trailopt 'l';; \
+      -[dEDm]) skip_next=yes;; \
+      -[JT]) skip_next=yes;; \
+    esac; \
+    case $$flg in \
+      *$$target_option*) has_opt=yes; break;; \
+    esac; \
+  done; \
+  test $$has_opt = yes
+am__make_dryrun = (target_option=n; $(am__make_running_with_option))
+am__make_keepgoing = (target_option=k; $(am__make_running_with_option))
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+bin_PROGRAMS = grep$(EXEEXT)
+@USE_PCRE_TRUE@am__append_1 = pcresearch.c
+subdir = src
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/m4/00gnulib.m4 \
+	$(top_srcdir)/m4/__inline.m4 \
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+GL_GNULIB_POPEN = @GL_GNULIB_POPEN@
+GL_GNULIB_POSIX_MEMALIGN = @GL_GNULIB_POSIX_MEMALIGN@
+GL_GNULIB_POSIX_OPENPT = @GL_GNULIB_POSIX_OPENPT@
+GL_GNULIB_PREAD = @GL_GNULIB_PREAD@
+GL_GNULIB_PRINTF = @GL_GNULIB_PRINTF@
+GL_GNULIB_PRINTF_POSIX = @GL_GNULIB_PRINTF_POSIX@
+GL_GNULIB_PSELECT = @GL_GNULIB_PSELECT@
+GL_GNULIB_PTHREAD_COND = @GL_GNULIB_PTHREAD_COND@
+GL_GNULIB_PTHREAD_MUTEX = @GL_GNULIB_PTHREAD_MUTEX@
+GL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK = @GL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK@
+GL_GNULIB_PTHREAD_ONCE = @GL_GNULIB_PTHREAD_ONCE@
+GL_GNULIB_PTHREAD_RWLOCK = @GL_GNULIB_PTHREAD_RWLOCK@
+GL_GNULIB_PTHREAD_SIGMASK = @GL_GNULIB_PTHREAD_SIGMASK@
+GL_GNULIB_PTHREAD_SPIN = @GL_GNULIB_PTHREAD_SPIN@
+GL_GNULIB_PTHREAD_THREAD = @GL_GNULIB_PTHREAD_THREAD@
+GL_GNULIB_PTHREAD_TSS = @GL_GNULIB_PTHREAD_TSS@
+GL_GNULIB_PTSNAME = @GL_GNULIB_PTSNAME@
+GL_GNULIB_PTSNAME_R = @GL_GNULIB_PTSNAME_R@
+GL_GNULIB_PUTC = @GL_GNULIB_PUTC@
+GL_GNULIB_PUTCHAR = @GL_GNULIB_PUTCHAR@
+GL_GNULIB_PUTENV = @GL_GNULIB_PUTENV@
+GL_GNULIB_PUTS = @GL_GNULIB_PUTS@
+GL_GNULIB_PWRITE = @GL_GNULIB_PWRITE@
+GL_GNULIB_QSORT_R = @GL_GNULIB_QSORT_R@
+GL_GNULIB_RAISE = @GL_GNULIB_RAISE@
+GL_GNULIB_RANDOM = @GL_GNULIB_RANDOM@
+GL_GNULIB_RANDOM_R = @GL_GNULIB_RANDOM_R@
+GL_GNULIB_RAWMEMCHR = @GL_GNULIB_RAWMEMCHR@
+GL_GNULIB_READ = @GL_GNULIB_READ@
+GL_GNULIB_READDIR = @GL_GNULIB_READDIR@
+GL_GNULIB_READLINK = @GL_GNULIB_READLINK@
+GL_GNULIB_READLINKAT = @GL_GNULIB_READLINKAT@
+GL_GNULIB_REALLOCARRAY = @GL_GNULIB_REALLOCARRAY@
+GL_GNULIB_REALLOC_POSIX = @GL_GNULIB_REALLOC_POSIX@
+GL_GNULIB_REALPATH = @GL_GNULIB_REALPATH@
+GL_GNULIB_RECV = @GL_GNULIB_RECV@
+GL_GNULIB_RECVFROM = @GL_GNULIB_RECVFROM@
+GL_GNULIB_REMOVE = @GL_GNULIB_REMOVE@
+GL_GNULIB_RENAME = @GL_GNULIB_RENAME@
+GL_GNULIB_RENAMEAT = @GL_GNULIB_RENAMEAT@
+GL_GNULIB_REWINDDIR = @GL_GNULIB_REWINDDIR@
+GL_GNULIB_RMDIR = @GL_GNULIB_RMDIR@
+GL_GNULIB_RPMATCH = @GL_GNULIB_RPMATCH@
+GL_GNULIB_SCANDIR = @GL_GNULIB_SCANDIR@
+GL_GNULIB_SCANF = @GL_GNULIB_SCANF@
+GL_GNULIB_SCHED_YIELD = @GL_GNULIB_SCHED_YIELD@
+GL_GNULIB_SECURE_GETENV = @GL_GNULIB_SECURE_GETENV@
+GL_GNULIB_SELECT = @GL_GNULIB_SELECT@
+GL_GNULIB_SEND = @GL_GNULIB_SEND@
+GL_GNULIB_SENDTO = @GL_GNULIB_SENDTO@
+GL_GNULIB_SETENV = @GL_GNULIB_SETENV@
+GL_GNULIB_SETHOSTNAME = @GL_GNULIB_SETHOSTNAME@
+GL_GNULIB_SETLOCALE = @GL_GNULIB_SETLOCALE@
+GL_GNULIB_SETLOCALE_NULL = @GL_GNULIB_SETLOCALE_NULL@
+GL_GNULIB_SETSOCKOPT = @GL_GNULIB_SETSOCKOPT@
+GL_GNULIB_SHUTDOWN = @GL_GNULIB_SHUTDOWN@
+GL_GNULIB_SIGABBREV_NP = @GL_GNULIB_SIGABBREV_NP@
+GL_GNULIB_SIGACTION = @GL_GNULIB_SIGACTION@
+GL_GNULIB_SIGDESCR_NP = @GL_GNULIB_SIGDESCR_NP@
+GL_GNULIB_SIGNAL_H_SIGPIPE = @GL_GNULIB_SIGNAL_H_SIGPIPE@
+GL_GNULIB_SIGPROCMASK = @GL_GNULIB_SIGPROCMASK@
+GL_GNULIB_SLEEP = @GL_GNULIB_SLEEP@
+GL_GNULIB_SNPRINTF = @GL_GNULIB_SNPRINTF@
+GL_GNULIB_SOCKET = @GL_GNULIB_SOCKET@
+GL_GNULIB_SPRINTF_POSIX = @GL_GNULIB_SPRINTF_POSIX@
+GL_GNULIB_STAT = @GL_GNULIB_STAT@
+GL_GNULIB_STDIO_H_NONBLOCKING = @GL_GNULIB_STDIO_H_NONBLOCKING@
+GL_GNULIB_STDIO_H_SIGPIPE = @GL_GNULIB_STDIO_H_SIGPIPE@
+GL_GNULIB_STPCPY = @GL_GNULIB_STPCPY@
+GL_GNULIB_STPNCPY = @GL_GNULIB_STPNCPY@
+GL_GNULIB_STRCASESTR = @GL_GNULIB_STRCASESTR@
+GL_GNULIB_STRCHRNUL = @GL_GNULIB_STRCHRNUL@
+GL_GNULIB_STRDUP = @GL_GNULIB_STRDUP@
+GL_GNULIB_STRERROR = @GL_GNULIB_STRERROR@
+GL_GNULIB_STRERRORNAME_NP = @GL_GNULIB_STRERRORNAME_NP@
+GL_GNULIB_STRERROR_R = @GL_GNULIB_STRERROR_R@
+GL_GNULIB_STRFTIME = @GL_GNULIB_STRFTIME@
+GL_GNULIB_STRNCAT = @GL_GNULIB_STRNCAT@
+GL_GNULIB_STRNDUP = @GL_GNULIB_STRNDUP@
+GL_GNULIB_STRNLEN = @GL_GNULIB_STRNLEN@
+GL_GNULIB_STRPBRK = @GL_GNULIB_STRPBRK@
+GL_GNULIB_STRPTIME = @GL_GNULIB_STRPTIME@
+GL_GNULIB_STRSEP = @GL_GNULIB_STRSEP@
+GL_GNULIB_STRSIGNAL = @GL_GNULIB_STRSIGNAL@
+GL_GNULIB_STRSTR = @GL_GNULIB_STRSTR@
+GL_GNULIB_STRTOD = @GL_GNULIB_STRTOD@
+GL_GNULIB_STRTOIMAX = @GL_GNULIB_STRTOIMAX@
+GL_GNULIB_STRTOK_R = @GL_GNULIB_STRTOK_R@
+GL_GNULIB_STRTOL = @GL_GNULIB_STRTOL@
+GL_GNULIB_STRTOLD = @GL_GNULIB_STRTOLD@
+GL_GNULIB_STRTOLL = @GL_GNULIB_STRTOLL@
+GL_GNULIB_STRTOUL = @GL_GNULIB_STRTOUL@
+GL_GNULIB_STRTOULL = @GL_GNULIB_STRTOULL@
+GL_GNULIB_STRTOUMAX = @GL_GNULIB_STRTOUMAX@
+GL_GNULIB_STRVERSCMP = @GL_GNULIB_STRVERSCMP@
+GL_GNULIB_SYMLINK = @GL_GNULIB_SYMLINK@
+GL_GNULIB_SYMLINKAT = @GL_GNULIB_SYMLINKAT@
+GL_GNULIB_SYSTEM_POSIX = @GL_GNULIB_SYSTEM_POSIX@
+GL_GNULIB_TIMEGM = @GL_GNULIB_TIMEGM@
+GL_GNULIB_TIMESPEC_GET = @GL_GNULIB_TIMESPEC_GET@
+GL_GNULIB_TIME_R = @GL_GNULIB_TIME_R@
+GL_GNULIB_TIME_RZ = @GL_GNULIB_TIME_RZ@
+GL_GNULIB_TMPFILE = @GL_GNULIB_TMPFILE@
+GL_GNULIB_TOWCTRANS = @GL_GNULIB_TOWCTRANS@
+GL_GNULIB_TRUNCATE = @GL_GNULIB_TRUNCATE@
+GL_GNULIB_TTYNAME_R = @GL_GNULIB_TTYNAME_R@
+GL_GNULIB_TZSET = @GL_GNULIB_TZSET@
+GL_GNULIB_UNISTD_H_GETOPT = @GL_GNULIB_UNISTD_H_GETOPT@
+GL_GNULIB_UNISTD_H_NONBLOCKING = @GL_GNULIB_UNISTD_H_NONBLOCKING@
+GL_GNULIB_UNISTD_H_SIGPIPE = @GL_GNULIB_UNISTD_H_SIGPIPE@
+GL_GNULIB_UNLINK = @GL_GNULIB_UNLINK@
+GL_GNULIB_UNLINKAT = @GL_GNULIB_UNLINKAT@
+GL_GNULIB_UNLOCKPT = @GL_GNULIB_UNLOCKPT@
+GL_GNULIB_UNSETENV = @GL_GNULIB_UNSETENV@
+GL_GNULIB_USLEEP = @GL_GNULIB_USLEEP@
+GL_GNULIB_UTIMENSAT = @GL_GNULIB_UTIMENSAT@
+GL_GNULIB_VASPRINTF = @GL_GNULIB_VASPRINTF@
+GL_GNULIB_VDPRINTF = @GL_GNULIB_VDPRINTF@
+GL_GNULIB_VFPRINTF = @GL_GNULIB_VFPRINTF@
+GL_GNULIB_VFPRINTF_POSIX = @GL_GNULIB_VFPRINTF_POSIX@
+GL_GNULIB_VFSCANF = @GL_GNULIB_VFSCANF@
+GL_GNULIB_VPRINTF = @GL_GNULIB_VPRINTF@
+GL_GNULIB_VPRINTF_POSIX = @GL_GNULIB_VPRINTF_POSIX@
+GL_GNULIB_VSCANF = @GL_GNULIB_VSCANF@
+GL_GNULIB_VSNPRINTF = @GL_GNULIB_VSNPRINTF@
+GL_GNULIB_VSPRINTF_POSIX = @GL_GNULIB_VSPRINTF_POSIX@
+GL_GNULIB_WCPCPY = @GL_GNULIB_WCPCPY@
+GL_GNULIB_WCPNCPY = @GL_GNULIB_WCPNCPY@
+GL_GNULIB_WCRTOMB = @GL_GNULIB_WCRTOMB@
+GL_GNULIB_WCSCASECMP = @GL_GNULIB_WCSCASECMP@
+GL_GNULIB_WCSCAT = @GL_GNULIB_WCSCAT@
+GL_GNULIB_WCSCHR = @GL_GNULIB_WCSCHR@
+GL_GNULIB_WCSCMP = @GL_GNULIB_WCSCMP@
+GL_GNULIB_WCSCOLL = @GL_GNULIB_WCSCOLL@
+GL_GNULIB_WCSCPY = @GL_GNULIB_WCSCPY@
+GL_GNULIB_WCSCSPN = @GL_GNULIB_WCSCSPN@
+GL_GNULIB_WCSDUP = @GL_GNULIB_WCSDUP@
+GL_GNULIB_WCSFTIME = @GL_GNULIB_WCSFTIME@
+GL_GNULIB_WCSLEN = @GL_GNULIB_WCSLEN@
+GL_GNULIB_WCSNCASECMP = @GL_GNULIB_WCSNCASECMP@
+GL_GNULIB_WCSNCAT = @GL_GNULIB_WCSNCAT@
+GL_GNULIB_WCSNCMP = @GL_GNULIB_WCSNCMP@
+GL_GNULIB_WCSNCPY = @GL_GNULIB_WCSNCPY@
+GL_GNULIB_WCSNLEN = @GL_GNULIB_WCSNLEN@
+GL_GNULIB_WCSNRTOMBS = @GL_GNULIB_WCSNRTOMBS@
+GL_GNULIB_WCSPBRK = @GL_GNULIB_WCSPBRK@
+GL_GNULIB_WCSRCHR = @GL_GNULIB_WCSRCHR@
+GL_GNULIB_WCSRTOMBS = @GL_GNULIB_WCSRTOMBS@
+GL_GNULIB_WCSSPN = @GL_GNULIB_WCSSPN@
+GL_GNULIB_WCSSTR = @GL_GNULIB_WCSSTR@
+GL_GNULIB_WCSTOK = @GL_GNULIB_WCSTOK@
+GL_GNULIB_WCSWIDTH = @GL_GNULIB_WCSWIDTH@
+GL_GNULIB_WCSXFRM = @GL_GNULIB_WCSXFRM@
+GL_GNULIB_WCTOB = @GL_GNULIB_WCTOB@
+GL_GNULIB_WCTOMB = @GL_GNULIB_WCTOMB@
+GL_GNULIB_WCTRANS = @GL_GNULIB_WCTRANS@
+GL_GNULIB_WCTYPE = @GL_GNULIB_WCTYPE@
+GL_GNULIB_WCWIDTH = @GL_GNULIB_WCWIDTH@
+GL_GNULIB_WMEMCHR = @GL_GNULIB_WMEMCHR@
+GL_GNULIB_WMEMCMP = @GL_GNULIB_WMEMCMP@
+GL_GNULIB_WMEMCPY = @GL_GNULIB_WMEMCPY@
+GL_GNULIB_WMEMMOVE = @GL_GNULIB_WMEMMOVE@
+GL_GNULIB_WMEMPCPY = @GL_GNULIB_WMEMPCPY@
+GL_GNULIB_WMEMSET = @GL_GNULIB_WMEMSET@
+GL_GNULIB_WRITE = @GL_GNULIB_WRITE@
+GL_GNULIB__EXIT = @GL_GNULIB__EXIT@
+GMSGFMT = @GMSGFMT@
+GMSGFMT_015 = @GMSGFMT_015@
+GNULIBHEADERS_OVERRIDE_WINT_T = @GNULIBHEADERS_OVERRIDE_WINT_T@
+GNULIB_GETTIMEOFDAY = @GNULIB_GETTIMEOFDAY@
+GNULIB_TEST_WARN_CFLAGS = @GNULIB_TEST_WARN_CFLAGS@
+GNULIB_WARN_CFLAGS = @GNULIB_WARN_CFLAGS@
+GREP = @GREP@
+HAVE_ACCEPT4 = @HAVE_ACCEPT4@
+HAVE_ALIGNED_ALLOC = @HAVE_ALIGNED_ALLOC@
+HAVE_ALLOCA_H = @HAVE_ALLOCA_H@
+HAVE_ALPHASORT = @HAVE_ALPHASORT@
+HAVE_ARPA_INET_H = @HAVE_ARPA_INET_H@
+HAVE_ATOLL = @HAVE_ATOLL@
+HAVE_BTOWC = @HAVE_BTOWC@
+HAVE_C99_STDINT_H = @HAVE_C99_STDINT_H@
+HAVE_CANONICALIZE_FILE_NAME = @HAVE_CANONICALIZE_FILE_NAME@
+HAVE_CHOWN = @HAVE_CHOWN@
+HAVE_CLOSEDIR = @HAVE_CLOSEDIR@
+HAVE_COPY_FILE_RANGE = @HAVE_COPY_FILE_RANGE@
+HAVE_CRTDEFS_H = @HAVE_CRTDEFS_H@
+HAVE_DECL_DIRFD = @HAVE_DECL_DIRFD@
+HAVE_DECL_ECVT = @HAVE_DECL_ECVT@
+HAVE_DECL_ENVIRON = @HAVE_DECL_ENVIRON@
+HAVE_DECL_EXECVPE = @HAVE_DECL_EXECVPE@
+HAVE_DECL_FCHDIR = @HAVE_DECL_FCHDIR@
+HAVE_DECL_FCLOSEALL = @HAVE_DECL_FCLOSEALL@
+HAVE_DECL_FCVT = @HAVE_DECL_FCVT@
+HAVE_DECL_FDATASYNC = @HAVE_DECL_FDATASYNC@
+HAVE_DECL_FDOPENDIR = @HAVE_DECL_FDOPENDIR@
+HAVE_DECL_FPURGE = @HAVE_DECL_FPURGE@
+HAVE_DECL_FSEEKO = @HAVE_DECL_FSEEKO@
+HAVE_DECL_FTELLO = @HAVE_DECL_FTELLO@
+HAVE_DECL_GCVT = @HAVE_DECL_GCVT@
+HAVE_DECL_GETDELIM = @HAVE_DECL_GETDELIM@
+HAVE_DECL_GETDOMAINNAME = @HAVE_DECL_GETDOMAINNAME@
+HAVE_DECL_GETLINE = @HAVE_DECL_GETLINE@
+HAVE_DECL_GETLOADAVG = @HAVE_DECL_GETLOADAVG@
+HAVE_DECL_GETLOGIN = @HAVE_DECL_GETLOGIN@
+HAVE_DECL_GETLOGIN_R = @HAVE_DECL_GETLOGIN_R@
+HAVE_DECL_GETPAGESIZE = @HAVE_DECL_GETPAGESIZE@
+HAVE_DECL_GETUSERSHELL = @HAVE_DECL_GETUSERSHELL@
+HAVE_DECL_IMAXABS = @HAVE_DECL_IMAXABS@
+HAVE_DECL_IMAXDIV = @HAVE_DECL_IMAXDIV@
+HAVE_DECL_INET_NTOP = @HAVE_DECL_INET_NTOP@
+HAVE_DECL_INET_PTON = @HAVE_DECL_INET_PTON@
+HAVE_DECL_INITSTATE = @HAVE_DECL_INITSTATE@
+HAVE_DECL_LOCALTIME_R = @HAVE_DECL_LOCALTIME_R@
+HAVE_DECL_MEMMEM = @HAVE_DECL_MEMMEM@
+HAVE_DECL_MEMRCHR = @HAVE_DECL_MEMRCHR@
+HAVE_DECL_OBSTACK_PRINTF = @HAVE_DECL_OBSTACK_PRINTF@
+HAVE_DECL_SETENV = @HAVE_DECL_SETENV@
+HAVE_DECL_SETHOSTNAME = @HAVE_DECL_SETHOSTNAME@
+HAVE_DECL_SETSTATE = @HAVE_DECL_SETSTATE@
+HAVE_DECL_SNPRINTF = @HAVE_DECL_SNPRINTF@
+HAVE_DECL_STRDUP = @HAVE_DECL_STRDUP@
+HAVE_DECL_STRERROR_R = @HAVE_DECL_STRERROR_R@
+HAVE_DECL_STRNDUP = @HAVE_DECL_STRNDUP@
+HAVE_DECL_STRNLEN = @HAVE_DECL_STRNLEN@
+HAVE_DECL_STRSIGNAL = @HAVE_DECL_STRSIGNAL@
+HAVE_DECL_STRTOIMAX = @HAVE_DECL_STRTOIMAX@
+HAVE_DECL_STRTOK_R = @HAVE_DECL_STRTOK_R@
+HAVE_DECL_STRTOUMAX = @HAVE_DECL_STRTOUMAX@
+HAVE_DECL_TRUNCATE = @HAVE_DECL_TRUNCATE@
+HAVE_DECL_TTYNAME_R = @HAVE_DECL_TTYNAME_R@
+HAVE_DECL_UNSETENV = @HAVE_DECL_UNSETENV@
+HAVE_DECL_VSNPRINTF = @HAVE_DECL_VSNPRINTF@
+HAVE_DECL_WCSDUP = @HAVE_DECL_WCSDUP@
+HAVE_DECL_WCTOB = @HAVE_DECL_WCTOB@
+HAVE_DECL_WCWIDTH = @HAVE_DECL_WCWIDTH@
+HAVE_DIRENT_H = @HAVE_DIRENT_H@
+HAVE_DPRINTF = @HAVE_DPRINTF@
+HAVE_DUP3 = @HAVE_DUP3@
+HAVE_DUPLOCALE = @HAVE_DUPLOCALE@
+HAVE_EUIDACCESS = @HAVE_EUIDACCESS@
+HAVE_EXECVPE = @HAVE_EXECVPE@
+HAVE_EXPLICIT_BZERO = @HAVE_EXPLICIT_BZERO@
+HAVE_FACCESSAT = @HAVE_FACCESSAT@
+HAVE_FCHDIR = @HAVE_FCHDIR@
+HAVE_FCHMODAT = @HAVE_FCHMODAT@
+HAVE_FCHOWNAT = @HAVE_FCHOWNAT@
+HAVE_FCNTL = @HAVE_FCNTL@
+HAVE_FDATASYNC = @HAVE_FDATASYNC@
+HAVE_FDOPENDIR = @HAVE_FDOPENDIR@
+HAVE_FEATURES_H = @HAVE_FEATURES_H@
+HAVE_FFSL = @HAVE_FFSL@
+HAVE_FFSLL = @HAVE_FFSLL@
+HAVE_FNMATCH = @HAVE_FNMATCH@
+HAVE_FNMATCH_H = @HAVE_FNMATCH_H@
+HAVE_FREELOCALE = @HAVE_FREELOCALE@
+HAVE_FSEEKO = @HAVE_FSEEKO@
+HAVE_FSTATAT = @HAVE_FSTATAT@
+HAVE_FSYNC = @HAVE_FSYNC@
+HAVE_FTELLO = @HAVE_FTELLO@
+HAVE_FTRUNCATE = @HAVE_FTRUNCATE@
+HAVE_FUTIMENS = @HAVE_FUTIMENS@
+HAVE_GETDTABLESIZE = @HAVE_GETDTABLESIZE@
+HAVE_GETENTROPY = @HAVE_GETENTROPY@
+HAVE_GETGROUPS = @HAVE_GETGROUPS@
+HAVE_GETHOSTNAME = @HAVE_GETHOSTNAME@
+HAVE_GETLOGIN = @HAVE_GETLOGIN@
+HAVE_GETOPT_H = @HAVE_GETOPT_H@
+HAVE_GETPAGESIZE = @HAVE_GETPAGESIZE@
+HAVE_GETPASS = @HAVE_GETPASS@
+HAVE_GETSUBOPT = @HAVE_GETSUBOPT@
+HAVE_GETTIMEOFDAY = @HAVE_GETTIMEOFDAY@
+HAVE_GETUMASK = @HAVE_GETUMASK@
+HAVE_GRANTPT = @HAVE_GRANTPT@
+HAVE_GROUP_MEMBER = @HAVE_GROUP_MEMBER@
+HAVE_IMAXDIV_T = @HAVE_IMAXDIV_T@
+HAVE_INITSTATE = @HAVE_INITSTATE@
+HAVE_INTTYPES_H = @HAVE_INTTYPES_H@
+HAVE_ISBLANK = @HAVE_ISBLANK@
+HAVE_ISWBLANK = @HAVE_ISWBLANK@
+HAVE_ISWCNTRL = @HAVE_ISWCNTRL@
+HAVE_LANGINFO_ALTMON = @HAVE_LANGINFO_ALTMON@
+HAVE_LANGINFO_CODESET = @HAVE_LANGINFO_CODESET@
+HAVE_LANGINFO_ERA = @HAVE_LANGINFO_ERA@
+HAVE_LANGINFO_H = @HAVE_LANGINFO_H@
+HAVE_LANGINFO_T_FMT_AMPM = @HAVE_LANGINFO_T_FMT_AMPM@
+HAVE_LANGINFO_YESEXPR = @HAVE_LANGINFO_YESEXPR@
+HAVE_LCHMOD = @HAVE_LCHMOD@
+HAVE_LCHOWN = @HAVE_LCHOWN@
+HAVE_LIBSIGSEGV = @HAVE_LIBSIGSEGV@
+HAVE_LINK = @HAVE_LINK@
+HAVE_LINKAT = @HAVE_LINKAT@
+HAVE_LSTAT = @HAVE_LSTAT@
+HAVE_MAX_ALIGN_T = @HAVE_MAX_ALIGN_T@
+HAVE_MBRLEN = @HAVE_MBRLEN@
+HAVE_MBRTOWC = @HAVE_MBRTOWC@
+HAVE_MBSINIT = @HAVE_MBSINIT@
+HAVE_MBSLEN = @HAVE_MBSLEN@
+HAVE_MBSNRTOWCS = @HAVE_MBSNRTOWCS@
+HAVE_MBSRTOWCS = @HAVE_MBSRTOWCS@
+HAVE_MBTOWC = @HAVE_MBTOWC@
+HAVE_MEMPCPY = @HAVE_MEMPCPY@
+HAVE_MKDIRAT = @HAVE_MKDIRAT@
+HAVE_MKDTEMP = @HAVE_MKDTEMP@
+HAVE_MKFIFO = @HAVE_MKFIFO@
+HAVE_MKFIFOAT = @HAVE_MKFIFOAT@
+HAVE_MKNOD = @HAVE_MKNOD@
+HAVE_MKNODAT = @HAVE_MKNODAT@
+HAVE_MKOSTEMP = @HAVE_MKOSTEMP@
+HAVE_MKOSTEMPS = @HAVE_MKOSTEMPS@
+HAVE_MKSTEMP = @HAVE_MKSTEMP@
+HAVE_MKSTEMPS = @HAVE_MKSTEMPS@
+HAVE_MSVC_INVALID_PARAMETER_HANDLER = @HAVE_MSVC_INVALID_PARAMETER_HANDLER@
+HAVE_NANOSLEEP = @HAVE_NANOSLEEP@
+HAVE_NETINET_IN_H = @HAVE_NETINET_IN_H@
+HAVE_NEWLOCALE = @HAVE_NEWLOCALE@
+HAVE_NL_LANGINFO = @HAVE_NL_LANGINFO@
+HAVE_OPENAT = @HAVE_OPENAT@
+HAVE_OPENDIR = @HAVE_OPENDIR@
+HAVE_OS_H = @HAVE_OS_H@
+HAVE_PCLOSE = @HAVE_PCLOSE@
+HAVE_PIPE = @HAVE_PIPE@
+HAVE_PIPE2 = @HAVE_PIPE2@
+HAVE_POPEN = @HAVE_POPEN@
+HAVE_POSIX_MEMALIGN = @HAVE_POSIX_MEMALIGN@
+HAVE_POSIX_OPENPT = @HAVE_POSIX_OPENPT@
+HAVE_POSIX_SIGNALBLOCKING = @HAVE_POSIX_SIGNALBLOCKING@
+HAVE_PREAD = @HAVE_PREAD@
+HAVE_PSELECT = @HAVE_PSELECT@
+HAVE_PTHREAD_ATTR_DESTROY = @HAVE_PTHREAD_ATTR_DESTROY@
+HAVE_PTHREAD_ATTR_GETDETACHSTATE = @HAVE_PTHREAD_ATTR_GETDETACHSTATE@
+HAVE_PTHREAD_ATTR_INIT = @HAVE_PTHREAD_ATTR_INIT@
+HAVE_PTHREAD_ATTR_SETDETACHSTATE = @HAVE_PTHREAD_ATTR_SETDETACHSTATE@
+HAVE_PTHREAD_CONDATTR_DESTROY = @HAVE_PTHREAD_CONDATTR_DESTROY@
+HAVE_PTHREAD_CONDATTR_INIT = @HAVE_PTHREAD_CONDATTR_INIT@
+HAVE_PTHREAD_COND_BROADCAST = @HAVE_PTHREAD_COND_BROADCAST@
+HAVE_PTHREAD_COND_DESTROY = @HAVE_PTHREAD_COND_DESTROY@
+HAVE_PTHREAD_COND_INIT = @HAVE_PTHREAD_COND_INIT@
+HAVE_PTHREAD_COND_SIGNAL = @HAVE_PTHREAD_COND_SIGNAL@
+HAVE_PTHREAD_COND_TIMEDWAIT = @HAVE_PTHREAD_COND_TIMEDWAIT@
+HAVE_PTHREAD_COND_WAIT = @HAVE_PTHREAD_COND_WAIT@
+HAVE_PTHREAD_CREATE = @HAVE_PTHREAD_CREATE@
+HAVE_PTHREAD_CREATE_DETACHED = @HAVE_PTHREAD_CREATE_DETACHED@
+HAVE_PTHREAD_DETACH = @HAVE_PTHREAD_DETACH@
+HAVE_PTHREAD_EQUAL = @HAVE_PTHREAD_EQUAL@
+HAVE_PTHREAD_EXIT = @HAVE_PTHREAD_EXIT@
+HAVE_PTHREAD_GETSPECIFIC = @HAVE_PTHREAD_GETSPECIFIC@
+HAVE_PTHREAD_H = @HAVE_PTHREAD_H@
+HAVE_PTHREAD_JOIN = @HAVE_PTHREAD_JOIN@
+HAVE_PTHREAD_KEY_CREATE = @HAVE_PTHREAD_KEY_CREATE@
+HAVE_PTHREAD_KEY_DELETE = @HAVE_PTHREAD_KEY_DELETE@
+HAVE_PTHREAD_MUTEXATTR_DESTROY = @HAVE_PTHREAD_MUTEXATTR_DESTROY@
+HAVE_PTHREAD_MUTEXATTR_GETROBUST = @HAVE_PTHREAD_MUTEXATTR_GETROBUST@
+HAVE_PTHREAD_MUTEXATTR_GETTYPE = @HAVE_PTHREAD_MUTEXATTR_GETTYPE@
+HAVE_PTHREAD_MUTEXATTR_INIT = @HAVE_PTHREAD_MUTEXATTR_INIT@
+HAVE_PTHREAD_MUTEXATTR_SETROBUST = @HAVE_PTHREAD_MUTEXATTR_SETROBUST@
+HAVE_PTHREAD_MUTEXATTR_SETTYPE = @HAVE_PTHREAD_MUTEXATTR_SETTYPE@
+HAVE_PTHREAD_MUTEX_DESTROY = @HAVE_PTHREAD_MUTEX_DESTROY@
+HAVE_PTHREAD_MUTEX_INIT = @HAVE_PTHREAD_MUTEX_INIT@
+HAVE_PTHREAD_MUTEX_LOCK = @HAVE_PTHREAD_MUTEX_LOCK@
+HAVE_PTHREAD_MUTEX_RECURSIVE = @HAVE_PTHREAD_MUTEX_RECURSIVE@
+HAVE_PTHREAD_MUTEX_ROBUST = @HAVE_PTHREAD_MUTEX_ROBUST@
+HAVE_PTHREAD_MUTEX_TIMEDLOCK = @HAVE_PTHREAD_MUTEX_TIMEDLOCK@
+HAVE_PTHREAD_MUTEX_TRYLOCK = @HAVE_PTHREAD_MUTEX_TRYLOCK@
+HAVE_PTHREAD_MUTEX_UNLOCK = @HAVE_PTHREAD_MUTEX_UNLOCK@
+HAVE_PTHREAD_ONCE = @HAVE_PTHREAD_ONCE@
+HAVE_PTHREAD_PROCESS_SHARED = @HAVE_PTHREAD_PROCESS_SHARED@
+HAVE_PTHREAD_RWLOCKATTR_DESTROY = @HAVE_PTHREAD_RWLOCKATTR_DESTROY@
+HAVE_PTHREAD_RWLOCKATTR_INIT = @HAVE_PTHREAD_RWLOCKATTR_INIT@
+HAVE_PTHREAD_RWLOCK_DESTROY = @HAVE_PTHREAD_RWLOCK_DESTROY@
+HAVE_PTHREAD_RWLOCK_INIT = @HAVE_PTHREAD_RWLOCK_INIT@
+HAVE_PTHREAD_RWLOCK_RDLOCK = @HAVE_PTHREAD_RWLOCK_RDLOCK@
+HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK = @HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK@
+HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK = @HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK@
+HAVE_PTHREAD_RWLOCK_TRYRDLOCK = @HAVE_PTHREAD_RWLOCK_TRYRDLOCK@
+HAVE_PTHREAD_RWLOCK_TRYWRLOCK = @HAVE_PTHREAD_RWLOCK_TRYWRLOCK@
+HAVE_PTHREAD_RWLOCK_UNLOCK = @HAVE_PTHREAD_RWLOCK_UNLOCK@
+HAVE_PTHREAD_RWLOCK_WRLOCK = @HAVE_PTHREAD_RWLOCK_WRLOCK@
+HAVE_PTHREAD_SELF = @HAVE_PTHREAD_SELF@
+HAVE_PTHREAD_SETSPECIFIC = @HAVE_PTHREAD_SETSPECIFIC@
+HAVE_PTHREAD_SIGMASK = @HAVE_PTHREAD_SIGMASK@
+HAVE_PTHREAD_SPINLOCK_T = @HAVE_PTHREAD_SPINLOCK_T@
+HAVE_PTHREAD_SPIN_DESTROY = @HAVE_PTHREAD_SPIN_DESTROY@
+HAVE_PTHREAD_SPIN_INIT = @HAVE_PTHREAD_SPIN_INIT@
+HAVE_PTHREAD_SPIN_LOCK = @HAVE_PTHREAD_SPIN_LOCK@
+HAVE_PTHREAD_SPIN_TRYLOCK = @HAVE_PTHREAD_SPIN_TRYLOCK@
+HAVE_PTHREAD_SPIN_UNLOCK = @HAVE_PTHREAD_SPIN_UNLOCK@
+HAVE_PTHREAD_T = @HAVE_PTHREAD_T@
+HAVE_PTSNAME = @HAVE_PTSNAME@
+HAVE_PTSNAME_R = @HAVE_PTSNAME_R@
+HAVE_PWRITE = @HAVE_PWRITE@
+HAVE_QSORT_R = @HAVE_QSORT_R@
+HAVE_RAISE = @HAVE_RAISE@
+HAVE_RANDOM = @HAVE_RANDOM@
+HAVE_RANDOM_H = @HAVE_RANDOM_H@
+HAVE_RANDOM_R = @HAVE_RANDOM_R@
+HAVE_RAWMEMCHR = @HAVE_RAWMEMCHR@
+HAVE_READDIR = @HAVE_READDIR@
+HAVE_READLINK = @HAVE_READLINK@
+HAVE_READLINKAT = @HAVE_READLINKAT@
+HAVE_REALLOCARRAY = @HAVE_REALLOCARRAY@
+HAVE_REALPATH = @HAVE_REALPATH@
+HAVE_RENAMEAT = @HAVE_RENAMEAT@
+HAVE_REWINDDIR = @HAVE_REWINDDIR@
+HAVE_RPMATCH = @HAVE_RPMATCH@
+HAVE_SA_FAMILY_T = @HAVE_SA_FAMILY_T@
+HAVE_SCANDIR = @HAVE_SCANDIR@
+HAVE_SCHED_H = @HAVE_SCHED_H@
+HAVE_SCHED_YIELD = @HAVE_SCHED_YIELD@
+HAVE_SECURE_GETENV = @HAVE_SECURE_GETENV@
+HAVE_SETENV = @HAVE_SETENV@
+HAVE_SETHOSTNAME = @HAVE_SETHOSTNAME@
+HAVE_SETSTATE = @HAVE_SETSTATE@
+HAVE_SIGABBREV_NP = @HAVE_SIGABBREV_NP@
+HAVE_SIGACTION = @HAVE_SIGACTION@
+HAVE_SIGDESCR_NP = @HAVE_SIGDESCR_NP@
+HAVE_SIGHANDLER_T = @HAVE_SIGHANDLER_T@
+HAVE_SIGINFO_T = @HAVE_SIGINFO_T@
+HAVE_SIGNED_SIG_ATOMIC_T = @HAVE_SIGNED_SIG_ATOMIC_T@
+HAVE_SIGNED_WCHAR_T = @HAVE_SIGNED_WCHAR_T@
+HAVE_SIGNED_WINT_T = @HAVE_SIGNED_WINT_T@
+HAVE_SIGSET_T = @HAVE_SIGSET_T@
+HAVE_SLEEP = @HAVE_SLEEP@
+HAVE_STDINT_H = @HAVE_STDINT_H@
+HAVE_STPCPY = @HAVE_STPCPY@
+HAVE_STPNCPY = @HAVE_STPNCPY@
+HAVE_STRCASESTR = @HAVE_STRCASESTR@
+HAVE_STRCHRNUL = @HAVE_STRCHRNUL@
+HAVE_STRERRORNAME_NP = @HAVE_STRERRORNAME_NP@
+HAVE_STRPBRK = @HAVE_STRPBRK@
+HAVE_STRPTIME = @HAVE_STRPTIME@
+HAVE_STRSEP = @HAVE_STRSEP@
+HAVE_STRTOD = @HAVE_STRTOD@
+HAVE_STRTOL = @HAVE_STRTOL@
+HAVE_STRTOLD = @HAVE_STRTOLD@
+HAVE_STRTOLL = @HAVE_STRTOLL@
+HAVE_STRTOUL = @HAVE_STRTOUL@
+HAVE_STRTOULL = @HAVE_STRTOULL@
+HAVE_STRUCT_RANDOM_DATA = @HAVE_STRUCT_RANDOM_DATA@
+HAVE_STRUCT_SCHED_PARAM = @HAVE_STRUCT_SCHED_PARAM@
+HAVE_STRUCT_SIGACTION_SA_SIGACTION = @HAVE_STRUCT_SIGACTION_SA_SIGACTION@
+HAVE_STRUCT_SOCKADDR_STORAGE = @HAVE_STRUCT_SOCKADDR_STORAGE@
+HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY = @HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY@
+HAVE_STRUCT_TIMEVAL = @HAVE_STRUCT_TIMEVAL@
+HAVE_STRVERSCMP = @HAVE_STRVERSCMP@
+HAVE_SYMLINK = @HAVE_SYMLINK@
+HAVE_SYMLINKAT = @HAVE_SYMLINKAT@
+HAVE_SYS_BITYPES_H = @HAVE_SYS_BITYPES_H@
+HAVE_SYS_CDEFS_H = @HAVE_SYS_CDEFS_H@
+HAVE_SYS_INTTYPES_H = @HAVE_SYS_INTTYPES_H@
+HAVE_SYS_IOCTL_H = @HAVE_SYS_IOCTL_H@
+HAVE_SYS_LOADAVG_H = @HAVE_SYS_LOADAVG_H@
+HAVE_SYS_PARAM_H = @HAVE_SYS_PARAM_H@
+HAVE_SYS_SELECT_H = @HAVE_SYS_SELECT_H@
+HAVE_SYS_SOCKET_H = @HAVE_SYS_SOCKET_H@
+HAVE_SYS_TIME_H = @HAVE_SYS_TIME_H@
+HAVE_SYS_TYPES_H = @HAVE_SYS_TYPES_H@
+HAVE_SYS_UIO_H = @HAVE_SYS_UIO_H@
+HAVE_TIMEGM = @HAVE_TIMEGM@
+HAVE_TIMESPEC_GET = @HAVE_TIMESPEC_GET@
+HAVE_TIMEZONE_T = @HAVE_TIMEZONE_T@
+HAVE_TYPE_VOLATILE_SIG_ATOMIC_T = @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
+HAVE_UNISTD_H = @HAVE_UNISTD_H@
+HAVE_UNLINKAT = @HAVE_UNLINKAT@
+HAVE_UNLOCKPT = @HAVE_UNLOCKPT@
+HAVE_USLEEP = @HAVE_USLEEP@
+HAVE_UTIMENSAT = @HAVE_UTIMENSAT@
+HAVE_VASPRINTF = @HAVE_VASPRINTF@
+HAVE_VDPRINTF = @HAVE_VDPRINTF@
+HAVE_VISIBILITY = @HAVE_VISIBILITY@
+HAVE_WCHAR_H = @HAVE_WCHAR_H@
+HAVE_WCHAR_T = @HAVE_WCHAR_T@
+HAVE_WCPCPY = @HAVE_WCPCPY@
+HAVE_WCPNCPY = @HAVE_WCPNCPY@
+HAVE_WCRTOMB = @HAVE_WCRTOMB@
+HAVE_WCSCASECMP = @HAVE_WCSCASECMP@
+HAVE_WCSCAT = @HAVE_WCSCAT@
+HAVE_WCSCHR = @HAVE_WCSCHR@
+HAVE_WCSCMP = @HAVE_WCSCMP@
+HAVE_WCSCOLL = @HAVE_WCSCOLL@
+HAVE_WCSCPY = @HAVE_WCSCPY@
+HAVE_WCSCSPN = @HAVE_WCSCSPN@
+HAVE_WCSDUP = @HAVE_WCSDUP@
+HAVE_WCSFTIME = @HAVE_WCSFTIME@
+HAVE_WCSLEN = @HAVE_WCSLEN@
+HAVE_WCSNCASECMP = @HAVE_WCSNCASECMP@
+HAVE_WCSNCAT = @HAVE_WCSNCAT@
+HAVE_WCSNCMP = @HAVE_WCSNCMP@
+HAVE_WCSNCPY = @HAVE_WCSNCPY@
+HAVE_WCSNLEN = @HAVE_WCSNLEN@
+HAVE_WCSNRTOMBS = @HAVE_WCSNRTOMBS@
+HAVE_WCSPBRK = @HAVE_WCSPBRK@
+HAVE_WCSRCHR = @HAVE_WCSRCHR@
+HAVE_WCSRTOMBS = @HAVE_WCSRTOMBS@
+HAVE_WCSSPN = @HAVE_WCSSPN@
+HAVE_WCSSTR = @HAVE_WCSSTR@
+HAVE_WCSTOK = @HAVE_WCSTOK@
+HAVE_WCSWIDTH = @HAVE_WCSWIDTH@
+HAVE_WCSXFRM = @HAVE_WCSXFRM@
+HAVE_WCTRANS_T = @HAVE_WCTRANS_T@
+HAVE_WCTYPE_H = @HAVE_WCTYPE_H@
+HAVE_WCTYPE_T = @HAVE_WCTYPE_T@
+HAVE_WINSOCK2_H = @HAVE_WINSOCK2_H@
+HAVE_WINT_T = @HAVE_WINT_T@
+HAVE_WMEMCHR = @HAVE_WMEMCHR@
+HAVE_WMEMCMP = @HAVE_WMEMCMP@
+HAVE_WMEMCPY = @HAVE_WMEMCPY@
+HAVE_WMEMMOVE = @HAVE_WMEMMOVE@
+HAVE_WMEMPCPY = @HAVE_WMEMPCPY@
+HAVE_WMEMSET = @HAVE_WMEMSET@
+HAVE_WS2TCPIP_H = @HAVE_WS2TCPIP_H@
+HAVE_XLOCALE_H = @HAVE_XLOCALE_H@
+HAVE__BOOL = @HAVE__BOOL@
+HAVE__EXIT = @HAVE__EXIT@
+HOST_CPU = @HOST_CPU@
+HOST_CPU_C_ABI = @HOST_CPU_C_ABI@
+ICONV_CONST = @ICONV_CONST@
+ICONV_H = @ICONV_H@
+INCLUDE_NEXT = @INCLUDE_NEXT@
+INCLUDE_NEXT_AS_FIRST_DIRECTIVE = @INCLUDE_NEXT_AS_FIRST_DIRECTIVE@
+INET_PTON_LIB = @INET_PTON_LIB@
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+INT32_MAX_LT_INTMAX_MAX = @INT32_MAX_LT_INTMAX_MAX@
+INT64_MAX_EQ_LONG_MAX = @INT64_MAX_EQ_LONG_MAX@
+INTLLIBS = @INTLLIBS@
+INTL_MACOSX_LIBS = @INTL_MACOSX_LIBS@
+LDFLAGS = @LDFLAGS@
+LIBCSTACK = @LIBCSTACK@
+LIBGREPUTILS_LIBDEPS = @LIBGREPUTILS_LIBDEPS@
+LIBGREPUTILS_LTLIBDEPS = @LIBGREPUTILS_LTLIBDEPS@
+LIBICONV = @LIBICONV@
+LIBINTL = @LIBINTL@
+LIBMULTITHREAD = @LIBMULTITHREAD@
+LIBOBJS = @LIBOBJS@
+LIBPMULTITHREAD = @LIBPMULTITHREAD@
+LIBPTHREAD = @LIBPTHREAD@
+LIBS = @LIBS@
+LIBSIGSEGV = @LIBSIGSEGV@
+LIBSIGSEGV_PREFIX = @LIBSIGSEGV_PREFIX@
+LIBSOCKET = @LIBSOCKET@
+LIBSTDTHREAD = @LIBSTDTHREAD@
+LIBTESTS_LIBDEPS = @LIBTESTS_LIBDEPS@
+LIBTHREAD = @LIBTHREAD@
+LIBUNISTRING_UNISTR_H = @LIBUNISTRING_UNISTR_H@
+LIBUNISTRING_UNITYPES_H = @LIBUNISTRING_UNITYPES_H@
+LIBUNISTRING_UNIWIDTH_H = @LIBUNISTRING_UNIWIDTH_H@
+LIB_HARD_LOCALE = @LIB_HARD_LOCALE@
+LIB_MBRTOWC = @LIB_MBRTOWC@
+LIB_NANOSLEEP = @LIB_NANOSLEEP@
+LIB_NL_LANGINFO = @LIB_NL_LANGINFO@
+LIB_PTHREAD = @LIB_PTHREAD@
+LIB_PTHREAD_SIGMASK = @LIB_PTHREAD_SIGMASK@
+LIB_SCHED_YIELD = @LIB_SCHED_YIELD@
+LIB_SELECT = @LIB_SELECT@
+LIB_SETLOCALE = @LIB_SETLOCALE@
+LIB_SETLOCALE_NULL = @LIB_SETLOCALE_NULL@
+LIMITS_H = @LIMITS_H@
+LOCALCHARSET_TESTS_ENVIRONMENT = @LOCALCHARSET_TESTS_ENVIRONMENT@
+LOCALENAME_ENHANCE_LOCALE_FUNCS = @LOCALENAME_ENHANCE_LOCALE_FUNCS@
+LOCALE_FR = @LOCALE_FR@
+LOCALE_FR_UTF8 = @LOCALE_FR_UTF8@
+LOCALE_JA = @LOCALE_JA@
+LOCALE_TR_UTF8 = @LOCALE_TR_UTF8@
+LOCALE_ZH_CN = @LOCALE_ZH_CN@
+LTLIBCSTACK = @LTLIBCSTACK@
+LTLIBICONV = @LTLIBICONV@
+LTLIBINTL = @LTLIBINTL@
+LTLIBMULTITHREAD = @LTLIBMULTITHREAD@
+LTLIBOBJS = @LTLIBOBJS@
+LTLIBSIGSEGV = @LTLIBSIGSEGV@
+LTLIBTHREAD = @LTLIBTHREAD@
+MAKEINFO = @MAKEINFO@
+MKDIR_P = @MKDIR_P@
+MSGFMT = @MSGFMT@
+MSGFMT_015 = @MSGFMT_015@
+MSGMERGE = @MSGMERGE@
+NETINET_IN_H = @NETINET_IN_H@
+NEXT_ARPA_INET_H = @NEXT_ARPA_INET_H@
+NEXT_AS_FIRST_DIRECTIVE_ARPA_INET_H = @NEXT_AS_FIRST_DIRECTIVE_ARPA_INET_H@
+NEXT_AS_FIRST_DIRECTIVE_CTYPE_H = @NEXT_AS_FIRST_DIRECTIVE_CTYPE_H@
+NEXT_AS_FIRST_DIRECTIVE_DIRENT_H = @NEXT_AS_FIRST_DIRECTIVE_DIRENT_H@
+NEXT_AS_FIRST_DIRECTIVE_ERRNO_H = @NEXT_AS_FIRST_DIRECTIVE_ERRNO_H@
+NEXT_AS_FIRST_DIRECTIVE_FCNTL_H = @NEXT_AS_FIRST_DIRECTIVE_FCNTL_H@
+NEXT_AS_FIRST_DIRECTIVE_FLOAT_H = @NEXT_AS_FIRST_DIRECTIVE_FLOAT_H@
+NEXT_AS_FIRST_DIRECTIVE_FNMATCH_H = @NEXT_AS_FIRST_DIRECTIVE_FNMATCH_H@
+NEXT_AS_FIRST_DIRECTIVE_GETOPT_H = @NEXT_AS_FIRST_DIRECTIVE_GETOPT_H@
+NEXT_AS_FIRST_DIRECTIVE_ICONV_H = @NEXT_AS_FIRST_DIRECTIVE_ICONV_H@
+NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H = @NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H@
+NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H = @NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H@
+NEXT_AS_FIRST_DIRECTIVE_LIMITS_H = @NEXT_AS_FIRST_DIRECTIVE_LIMITS_H@
+NEXT_AS_FIRST_DIRECTIVE_LOCALE_H = @NEXT_AS_FIRST_DIRECTIVE_LOCALE_H@
+NEXT_AS_FIRST_DIRECTIVE_NETINET_IN_H = @NEXT_AS_FIRST_DIRECTIVE_NETINET_IN_H@
+NEXT_AS_FIRST_DIRECTIVE_PTHREAD_H = @NEXT_AS_FIRST_DIRECTIVE_PTHREAD_H@
+NEXT_AS_FIRST_DIRECTIVE_SCHED_H = @NEXT_AS_FIRST_DIRECTIVE_SCHED_H@
+NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H = @NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H@
+NEXT_AS_FIRST_DIRECTIVE_STDARG_H = @NEXT_AS_FIRST_DIRECTIVE_STDARG_H@
+NEXT_AS_FIRST_DIRECTIVE_STDDEF_H = @NEXT_AS_FIRST_DIRECTIVE_STDDEF_H@
+NEXT_AS_FIRST_DIRECTIVE_STDINT_H = @NEXT_AS_FIRST_DIRECTIVE_STDINT_H@
+NEXT_AS_FIRST_DIRECTIVE_STDIO_H = @NEXT_AS_FIRST_DIRECTIVE_STDIO_H@
+NEXT_AS_FIRST_DIRECTIVE_STDLIB_H = @NEXT_AS_FIRST_DIRECTIVE_STDLIB_H@
+NEXT_AS_FIRST_DIRECTIVE_STRING_H = @NEXT_AS_FIRST_DIRECTIVE_STRING_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H@
+NEXT_AS_FIRST_DIRECTIVE_TIME_H = @NEXT_AS_FIRST_DIRECTIVE_TIME_H@
+NEXT_AS_FIRST_DIRECTIVE_UNISTD_H = @NEXT_AS_FIRST_DIRECTIVE_UNISTD_H@
+NEXT_AS_FIRST_DIRECTIVE_WCHAR_H = @NEXT_AS_FIRST_DIRECTIVE_WCHAR_H@
+NEXT_AS_FIRST_DIRECTIVE_WCTYPE_H = @NEXT_AS_FIRST_DIRECTIVE_WCTYPE_H@
+NEXT_CTYPE_H = @NEXT_CTYPE_H@
+NEXT_DIRENT_H = @NEXT_DIRENT_H@
+NEXT_ERRNO_H = @NEXT_ERRNO_H@
+NEXT_FCNTL_H = @NEXT_FCNTL_H@
+NEXT_FLOAT_H = @NEXT_FLOAT_H@
+NEXT_FNMATCH_H = @NEXT_FNMATCH_H@
+NEXT_GETOPT_H = @NEXT_GETOPT_H@
+NEXT_ICONV_H = @NEXT_ICONV_H@
+NEXT_INTTYPES_H = @NEXT_INTTYPES_H@
+NEXT_LANGINFO_H = @NEXT_LANGINFO_H@
+NEXT_LIMITS_H = @NEXT_LIMITS_H@
+NEXT_LOCALE_H = @NEXT_LOCALE_H@
+NEXT_NETINET_IN_H = @NEXT_NETINET_IN_H@
+NEXT_PTHREAD_H = @NEXT_PTHREAD_H@
+NEXT_SCHED_H = @NEXT_SCHED_H@
+NEXT_SIGNAL_H = @NEXT_SIGNAL_H@
+NEXT_STDARG_H = @NEXT_STDARG_H@
+NEXT_STDDEF_H = @NEXT_STDDEF_H@
+NEXT_STDINT_H = @NEXT_STDINT_H@
+NEXT_STDIO_H = @NEXT_STDIO_H@
+NEXT_STDLIB_H = @NEXT_STDLIB_H@
+NEXT_STRING_H = @NEXT_STRING_H@
+NEXT_SYS_IOCTL_H = @NEXT_SYS_IOCTL_H@
+NEXT_SYS_SELECT_H = @NEXT_SYS_SELECT_H@
+NEXT_SYS_SOCKET_H = @NEXT_SYS_SOCKET_H@
+NEXT_SYS_STAT_H = @NEXT_SYS_STAT_H@
+NEXT_SYS_TIME_H = @NEXT_SYS_TIME_H@
+NEXT_SYS_TYPES_H = @NEXT_SYS_TYPES_H@
+NEXT_SYS_UIO_H = @NEXT_SYS_UIO_H@
+NEXT_TIME_H = @NEXT_TIME_H@
+NEXT_UNISTD_H = @NEXT_UNISTD_H@
+NEXT_WCHAR_H = @NEXT_WCHAR_H@
+NEXT_WCTYPE_H = @NEXT_WCTYPE_H@
+OBJEXT = @OBJEXT@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_STRING = @PACKAGE_STRING@
+PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+PCRE_CFLAGS = @PCRE_CFLAGS@
+PCRE_LIBS = @PCRE_LIBS@
+PERL = @PERL@
+PKG_CONFIG = @PKG_CONFIG@
+PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@
+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
+POSUB = @POSUB@
+PRAGMA_COLUMNS = @PRAGMA_COLUMNS@
+PRAGMA_SYSTEM_HEADER = @PRAGMA_SYSTEM_HEADER@
+PRIPTR_PREFIX = @PRIPTR_PREFIX@
+PTHREAD_H_DEFINES_STRUCT_TIMESPEC = @PTHREAD_H_DEFINES_STRUCT_TIMESPEC@
+PTRDIFF_T_SUFFIX = @PTRDIFF_T_SUFFIX@
+RANLIB = @RANLIB@
+REPLACE_ACCESS = @REPLACE_ACCESS@
+REPLACE_ALIGNED_ALLOC = @REPLACE_ALIGNED_ALLOC@
+REPLACE_BTOWC = @REPLACE_BTOWC@
+REPLACE_CALLOC = @REPLACE_CALLOC@
+REPLACE_CANONICALIZE_FILE_NAME = @REPLACE_CANONICALIZE_FILE_NAME@
+REPLACE_CHOWN = @REPLACE_CHOWN@
+REPLACE_CLOSE = @REPLACE_CLOSE@
+REPLACE_CLOSEDIR = @REPLACE_CLOSEDIR@
+REPLACE_CREAT = @REPLACE_CREAT@
+REPLACE_CTIME = @REPLACE_CTIME@
+REPLACE_DIRFD = @REPLACE_DIRFD@
+REPLACE_DPRINTF = @REPLACE_DPRINTF@
+REPLACE_DUP = @REPLACE_DUP@
+REPLACE_DUP2 = @REPLACE_DUP2@
+REPLACE_DUPLOCALE = @REPLACE_DUPLOCALE@
+REPLACE_EXECL = @REPLACE_EXECL@
+REPLACE_EXECLE = @REPLACE_EXECLE@
+REPLACE_EXECLP = @REPLACE_EXECLP@
+REPLACE_EXECV = @REPLACE_EXECV@
+REPLACE_EXECVE = @REPLACE_EXECVE@
+REPLACE_EXECVP = @REPLACE_EXECVP@
+REPLACE_EXECVPE = @REPLACE_EXECVPE@
+REPLACE_FACCESSAT = @REPLACE_FACCESSAT@
+REPLACE_FCHMODAT = @REPLACE_FCHMODAT@
+REPLACE_FCHOWNAT = @REPLACE_FCHOWNAT@
+REPLACE_FCLOSE = @REPLACE_FCLOSE@
+REPLACE_FCNTL = @REPLACE_FCNTL@
+REPLACE_FDOPEN = @REPLACE_FDOPEN@
+REPLACE_FDOPENDIR = @REPLACE_FDOPENDIR@
+REPLACE_FFLUSH = @REPLACE_FFLUSH@
+REPLACE_FFSLL = @REPLACE_FFSLL@
+REPLACE_FNMATCH = @REPLACE_FNMATCH@
+REPLACE_FOPEN = @REPLACE_FOPEN@
+REPLACE_FPRINTF = @REPLACE_FPRINTF@
+REPLACE_FPURGE = @REPLACE_FPURGE@
+REPLACE_FREE = @REPLACE_FREE@
+REPLACE_FREELOCALE = @REPLACE_FREELOCALE@
+REPLACE_FREOPEN = @REPLACE_FREOPEN@
+REPLACE_FSEEK = @REPLACE_FSEEK@
+REPLACE_FSEEKO = @REPLACE_FSEEKO@
+REPLACE_FSTAT = @REPLACE_FSTAT@
+REPLACE_FSTATAT = @REPLACE_FSTATAT@
+REPLACE_FTELL = @REPLACE_FTELL@
+REPLACE_FTELLO = @REPLACE_FTELLO@
+REPLACE_FTRUNCATE = @REPLACE_FTRUNCATE@
+REPLACE_FUTIMENS = @REPLACE_FUTIMENS@
+REPLACE_GETCWD = @REPLACE_GETCWD@
+REPLACE_GETDELIM = @REPLACE_GETDELIM@
+REPLACE_GETDOMAINNAME = @REPLACE_GETDOMAINNAME@
+REPLACE_GETDTABLESIZE = @REPLACE_GETDTABLESIZE@
+REPLACE_GETGROUPS = @REPLACE_GETGROUPS@
+REPLACE_GETLINE = @REPLACE_GETLINE@
+REPLACE_GETLOGIN_R = @REPLACE_GETLOGIN_R@
+REPLACE_GETPAGESIZE = @REPLACE_GETPAGESIZE@
+REPLACE_GETPASS = @REPLACE_GETPASS@
+REPLACE_GETTIMEOFDAY = @REPLACE_GETTIMEOFDAY@
+REPLACE_GMTIME = @REPLACE_GMTIME@
+REPLACE_ICONV = @REPLACE_ICONV@
+REPLACE_ICONV_OPEN = @REPLACE_ICONV_OPEN@
+REPLACE_ICONV_UTF = @REPLACE_ICONV_UTF@
+REPLACE_INET_NTOP = @REPLACE_INET_NTOP@
+REPLACE_INET_PTON = @REPLACE_INET_PTON@
+REPLACE_INITSTATE = @REPLACE_INITSTATE@
+REPLACE_IOCTL = @REPLACE_IOCTL@
+REPLACE_ISATTY = @REPLACE_ISATTY@
+REPLACE_ISWBLANK = @REPLACE_ISWBLANK@
+REPLACE_ISWCNTRL = @REPLACE_ISWCNTRL@
+REPLACE_ISWDIGIT = @REPLACE_ISWDIGIT@
+REPLACE_ISWXDIGIT = @REPLACE_ISWXDIGIT@
+REPLACE_ITOLD = @REPLACE_ITOLD@
+REPLACE_LCHOWN = @REPLACE_LCHOWN@
+REPLACE_LINK = @REPLACE_LINK@
+REPLACE_LINKAT = @REPLACE_LINKAT@
+REPLACE_LOCALECONV = @REPLACE_LOCALECONV@
+REPLACE_LOCALTIME = @REPLACE_LOCALTIME@
+REPLACE_LOCALTIME_R = @REPLACE_LOCALTIME_R@
+REPLACE_LSEEK = @REPLACE_LSEEK@
+REPLACE_LSTAT = @REPLACE_LSTAT@
+REPLACE_MALLOC = @REPLACE_MALLOC@
+REPLACE_MBRLEN = @REPLACE_MBRLEN@
+REPLACE_MBRTOWC = @REPLACE_MBRTOWC@
+REPLACE_MBSINIT = @REPLACE_MBSINIT@
+REPLACE_MBSNRTOWCS = @REPLACE_MBSNRTOWCS@
+REPLACE_MBSRTOWCS = @REPLACE_MBSRTOWCS@
+REPLACE_MBSTATE_T = @REPLACE_MBSTATE_T@
+REPLACE_MBTOWC = @REPLACE_MBTOWC@
+REPLACE_MEMCHR = @REPLACE_MEMCHR@
+REPLACE_MEMMEM = @REPLACE_MEMMEM@
+REPLACE_MKDIR = @REPLACE_MKDIR@
+REPLACE_MKFIFO = @REPLACE_MKFIFO@
+REPLACE_MKFIFOAT = @REPLACE_MKFIFOAT@
+REPLACE_MKNOD = @REPLACE_MKNOD@
+REPLACE_MKNODAT = @REPLACE_MKNODAT@
+REPLACE_MKSTEMP = @REPLACE_MKSTEMP@
+REPLACE_MKTIME = @REPLACE_MKTIME@
+REPLACE_NANOSLEEP = @REPLACE_NANOSLEEP@
+REPLACE_NEWLOCALE = @REPLACE_NEWLOCALE@
+REPLACE_NL_LANGINFO = @REPLACE_NL_LANGINFO@
+REPLACE_NULL = @REPLACE_NULL@
+REPLACE_OBSTACK_PRINTF = @REPLACE_OBSTACK_PRINTF@
+REPLACE_OPEN = @REPLACE_OPEN@
+REPLACE_OPENAT = @REPLACE_OPENAT@
+REPLACE_OPENDIR = @REPLACE_OPENDIR@
+REPLACE_PERROR = @REPLACE_PERROR@
+REPLACE_POPEN = @REPLACE_POPEN@
+REPLACE_POSIX_MEMALIGN = @REPLACE_POSIX_MEMALIGN@
+REPLACE_PREAD = @REPLACE_PREAD@
+REPLACE_PRINTF = @REPLACE_PRINTF@
+REPLACE_PSELECT = @REPLACE_PSELECT@
+REPLACE_PTHREAD_ATTR_DESTROY = @REPLACE_PTHREAD_ATTR_DESTROY@
+REPLACE_PTHREAD_ATTR_GETDETACHSTATE = @REPLACE_PTHREAD_ATTR_GETDETACHSTATE@
+REPLACE_PTHREAD_ATTR_INIT = @REPLACE_PTHREAD_ATTR_INIT@
+REPLACE_PTHREAD_ATTR_SETDETACHSTATE = @REPLACE_PTHREAD_ATTR_SETDETACHSTATE@
+REPLACE_PTHREAD_CONDATTR_DESTROY = @REPLACE_PTHREAD_CONDATTR_DESTROY@
+REPLACE_PTHREAD_CONDATTR_INIT = @REPLACE_PTHREAD_CONDATTR_INIT@
+REPLACE_PTHREAD_COND_BROADCAST = @REPLACE_PTHREAD_COND_BROADCAST@
+REPLACE_PTHREAD_COND_DESTROY = @REPLACE_PTHREAD_COND_DESTROY@
+REPLACE_PTHREAD_COND_INIT = @REPLACE_PTHREAD_COND_INIT@
+REPLACE_PTHREAD_COND_SIGNAL = @REPLACE_PTHREAD_COND_SIGNAL@
+REPLACE_PTHREAD_COND_TIMEDWAIT = @REPLACE_PTHREAD_COND_TIMEDWAIT@
+REPLACE_PTHREAD_COND_WAIT = @REPLACE_PTHREAD_COND_WAIT@
+REPLACE_PTHREAD_CREATE = @REPLACE_PTHREAD_CREATE@
+REPLACE_PTHREAD_DETACH = @REPLACE_PTHREAD_DETACH@
+REPLACE_PTHREAD_EQUAL = @REPLACE_PTHREAD_EQUAL@
+REPLACE_PTHREAD_EXIT = @REPLACE_PTHREAD_EXIT@
+REPLACE_PTHREAD_GETSPECIFIC = @REPLACE_PTHREAD_GETSPECIFIC@
+REPLACE_PTHREAD_JOIN = @REPLACE_PTHREAD_JOIN@
+REPLACE_PTHREAD_KEY_CREATE = @REPLACE_PTHREAD_KEY_CREATE@
+REPLACE_PTHREAD_KEY_DELETE = @REPLACE_PTHREAD_KEY_DELETE@
+REPLACE_PTHREAD_MUTEXATTR_DESTROY = @REPLACE_PTHREAD_MUTEXATTR_DESTROY@
+REPLACE_PTHREAD_MUTEXATTR_GETROBUST = @REPLACE_PTHREAD_MUTEXATTR_GETROBUST@
+REPLACE_PTHREAD_MUTEXATTR_GETTYPE = @REPLACE_PTHREAD_MUTEXATTR_GETTYPE@
+REPLACE_PTHREAD_MUTEXATTR_INIT = @REPLACE_PTHREAD_MUTEXATTR_INIT@
+REPLACE_PTHREAD_MUTEXATTR_SETROBUST = @REPLACE_PTHREAD_MUTEXATTR_SETROBUST@
+REPLACE_PTHREAD_MUTEXATTR_SETTYPE = @REPLACE_PTHREAD_MUTEXATTR_SETTYPE@
+REPLACE_PTHREAD_MUTEX_DESTROY = @REPLACE_PTHREAD_MUTEX_DESTROY@
+REPLACE_PTHREAD_MUTEX_INIT = @REPLACE_PTHREAD_MUTEX_INIT@
+REPLACE_PTHREAD_MUTEX_LOCK = @REPLACE_PTHREAD_MUTEX_LOCK@
+REPLACE_PTHREAD_MUTEX_TIMEDLOCK = @REPLACE_PTHREAD_MUTEX_TIMEDLOCK@
+REPLACE_PTHREAD_MUTEX_TRYLOCK = @REPLACE_PTHREAD_MUTEX_TRYLOCK@
+REPLACE_PTHREAD_MUTEX_UNLOCK = @REPLACE_PTHREAD_MUTEX_UNLOCK@
+REPLACE_PTHREAD_ONCE = @REPLACE_PTHREAD_ONCE@
+REPLACE_PTHREAD_RWLOCKATTR_DESTROY = @REPLACE_PTHREAD_RWLOCKATTR_DESTROY@
+REPLACE_PTHREAD_RWLOCKATTR_INIT = @REPLACE_PTHREAD_RWLOCKATTR_INIT@
+REPLACE_PTHREAD_RWLOCK_DESTROY = @REPLACE_PTHREAD_RWLOCK_DESTROY@
+REPLACE_PTHREAD_RWLOCK_INIT = @REPLACE_PTHREAD_RWLOCK_INIT@
+REPLACE_PTHREAD_RWLOCK_RDLOCK = @REPLACE_PTHREAD_RWLOCK_RDLOCK@
+REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK = @REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK@
+REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK = @REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK@
+REPLACE_PTHREAD_RWLOCK_TRYRDLOCK = @REPLACE_PTHREAD_RWLOCK_TRYRDLOCK@
+REPLACE_PTHREAD_RWLOCK_TRYWRLOCK = @REPLACE_PTHREAD_RWLOCK_TRYWRLOCK@
+REPLACE_PTHREAD_RWLOCK_UNLOCK = @REPLACE_PTHREAD_RWLOCK_UNLOCK@
+REPLACE_PTHREAD_RWLOCK_WRLOCK = @REPLACE_PTHREAD_RWLOCK_WRLOCK@
+REPLACE_PTHREAD_SELF = @REPLACE_PTHREAD_SELF@
+REPLACE_PTHREAD_SETSPECIFIC = @REPLACE_PTHREAD_SETSPECIFIC@
+REPLACE_PTHREAD_SIGMASK = @REPLACE_PTHREAD_SIGMASK@
+REPLACE_PTHREAD_SPIN_DESTROY = @REPLACE_PTHREAD_SPIN_DESTROY@
+REPLACE_PTHREAD_SPIN_INIT = @REPLACE_PTHREAD_SPIN_INIT@
+REPLACE_PTHREAD_SPIN_LOCK = @REPLACE_PTHREAD_SPIN_LOCK@
+REPLACE_PTHREAD_SPIN_TRYLOCK = @REPLACE_PTHREAD_SPIN_TRYLOCK@
+REPLACE_PTHREAD_SPIN_UNLOCK = @REPLACE_PTHREAD_SPIN_UNLOCK@
+REPLACE_PTSNAME = @REPLACE_PTSNAME@
+REPLACE_PTSNAME_R = @REPLACE_PTSNAME_R@
+REPLACE_PUTENV = @REPLACE_PUTENV@
+REPLACE_PWRITE = @REPLACE_PWRITE@
+REPLACE_QSORT_R = @REPLACE_QSORT_R@
+REPLACE_RAISE = @REPLACE_RAISE@
+REPLACE_RANDOM = @REPLACE_RANDOM@
+REPLACE_RANDOM_R = @REPLACE_RANDOM_R@
+REPLACE_READ = @REPLACE_READ@
+REPLACE_READLINK = @REPLACE_READLINK@
+REPLACE_READLINKAT = @REPLACE_READLINKAT@
+REPLACE_REALLOC = @REPLACE_REALLOC@
+REPLACE_REALLOCARRAY = @REPLACE_REALLOCARRAY@
+REPLACE_REALPATH = @REPLACE_REALPATH@
+REPLACE_REMOVE = @REPLACE_REMOVE@
+REPLACE_RENAME = @REPLACE_RENAME@
+REPLACE_RENAMEAT = @REPLACE_RENAMEAT@
+REPLACE_RMDIR = @REPLACE_RMDIR@
+REPLACE_SCHED_YIELD = @REPLACE_SCHED_YIELD@
+REPLACE_SELECT = @REPLACE_SELECT@
+REPLACE_SETENV = @REPLACE_SETENV@
+REPLACE_SETLOCALE = @REPLACE_SETLOCALE@
+REPLACE_SETSTATE = @REPLACE_SETSTATE@
+REPLACE_SLEEP = @REPLACE_SLEEP@
+REPLACE_SNPRINTF = @REPLACE_SNPRINTF@
+REPLACE_SPRINTF = @REPLACE_SPRINTF@
+REPLACE_STAT = @REPLACE_STAT@
+REPLACE_STDIO_READ_FUNCS = @REPLACE_STDIO_READ_FUNCS@
+REPLACE_STDIO_WRITE_FUNCS = @REPLACE_STDIO_WRITE_FUNCS@
+REPLACE_STPNCPY = @REPLACE_STPNCPY@
+REPLACE_STRCASESTR = @REPLACE_STRCASESTR@
+REPLACE_STRCHRNUL = @REPLACE_STRCHRNUL@
+REPLACE_STRDUP = @REPLACE_STRDUP@
+REPLACE_STRERROR = @REPLACE_STRERROR@
+REPLACE_STRERRORNAME_NP = @REPLACE_STRERRORNAME_NP@
+REPLACE_STRERROR_R = @REPLACE_STRERROR_R@
+REPLACE_STRFTIME = @REPLACE_STRFTIME@
+REPLACE_STRNCAT = @REPLACE_STRNCAT@
+REPLACE_STRNDUP = @REPLACE_STRNDUP@
+REPLACE_STRNLEN = @REPLACE_STRNLEN@
+REPLACE_STRSIGNAL = @REPLACE_STRSIGNAL@
+REPLACE_STRSTR = @REPLACE_STRSTR@
+REPLACE_STRTOD = @REPLACE_STRTOD@
+REPLACE_STRTOIMAX = @REPLACE_STRTOIMAX@
+REPLACE_STRTOK_R = @REPLACE_STRTOK_R@
+REPLACE_STRTOL = @REPLACE_STRTOL@
+REPLACE_STRTOLD = @REPLACE_STRTOLD@
+REPLACE_STRTOLL = @REPLACE_STRTOLL@
+REPLACE_STRTOUL = @REPLACE_STRTOUL@
+REPLACE_STRTOULL = @REPLACE_STRTOULL@
+REPLACE_STRTOUMAX = @REPLACE_STRTOUMAX@
+REPLACE_STRUCT_LCONV = @REPLACE_STRUCT_LCONV@
+REPLACE_STRUCT_TIMEVAL = @REPLACE_STRUCT_TIMEVAL@
+REPLACE_SYMLINK = @REPLACE_SYMLINK@
+REPLACE_SYMLINKAT = @REPLACE_SYMLINKAT@
+REPLACE_TIMEGM = @REPLACE_TIMEGM@
+REPLACE_TMPFILE = @REPLACE_TMPFILE@
+REPLACE_TOWLOWER = @REPLACE_TOWLOWER@
+REPLACE_TRUNCATE = @REPLACE_TRUNCATE@
+REPLACE_TTYNAME_R = @REPLACE_TTYNAME_R@
+REPLACE_TZSET = @REPLACE_TZSET@
+REPLACE_UNLINK = @REPLACE_UNLINK@
+REPLACE_UNLINKAT = @REPLACE_UNLINKAT@
+REPLACE_UNSETENV = @REPLACE_UNSETENV@
+REPLACE_USLEEP = @REPLACE_USLEEP@
+REPLACE_UTIMENSAT = @REPLACE_UTIMENSAT@
+REPLACE_VASPRINTF = @REPLACE_VASPRINTF@
+REPLACE_VDPRINTF = @REPLACE_VDPRINTF@
+REPLACE_VFPRINTF = @REPLACE_VFPRINTF@
+REPLACE_VPRINTF = @REPLACE_VPRINTF@
+REPLACE_VSNPRINTF = @REPLACE_VSNPRINTF@
+REPLACE_VSPRINTF = @REPLACE_VSPRINTF@
+REPLACE_WCRTOMB = @REPLACE_WCRTOMB@
+REPLACE_WCSFTIME = @REPLACE_WCSFTIME@
+REPLACE_WCSNRTOMBS = @REPLACE_WCSNRTOMBS@
+REPLACE_WCSRTOMBS = @REPLACE_WCSRTOMBS@
+REPLACE_WCSTOK = @REPLACE_WCSTOK@
+REPLACE_WCSWIDTH = @REPLACE_WCSWIDTH@
+REPLACE_WCTOB = @REPLACE_WCTOB@
+REPLACE_WCTOMB = @REPLACE_WCTOMB@
+REPLACE_WCWIDTH = @REPLACE_WCWIDTH@
+REPLACE_WRITE = @REPLACE_WRITE@
+SED = @SED@
+SET_MAKE = @SET_MAKE@
+SHELL = @SHELL@
+SIGSEGV_H = @SIGSEGV_H@
+SIG_ATOMIC_T_SUFFIX = @SIG_ATOMIC_T_SUFFIX@
+SIZE_T_SUFFIX = @SIZE_T_SUFFIX@
+STDALIGN_H = @STDALIGN_H@
+STDARG_H = @STDARG_H@
+STDBOOL_H = @STDBOOL_H@
+STDDEF_H = @STDDEF_H@
+STDINT_H = @STDINT_H@
+STRIP = @STRIP@
+SYS_IOCTL_H_HAVE_WINSOCK2_H = @SYS_IOCTL_H_HAVE_WINSOCK2_H@
+SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS = @SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
+SYS_TIME_H_DEFINES_STRUCT_TIMESPEC = @SYS_TIME_H_DEFINES_STRUCT_TIMESPEC@
+TIME_H_DEFINES_STRUCT_TIMESPEC = @TIME_H_DEFINES_STRUCT_TIMESPEC@
+TIME_H_DEFINES_TIME_UTC = @TIME_H_DEFINES_TIME_UTC@
+UINT32_MAX_LT_UINTMAX_MAX = @UINT32_MAX_LT_UINTMAX_MAX@
+UINT64_MAX_EQ_ULONG_MAX = @UINT64_MAX_EQ_ULONG_MAX@
+UNDEFINE_STRTOK_R = @UNDEFINE_STRTOK_R@
+UNISTD_H_DEFINES_STRUCT_TIMESPEC = @UNISTD_H_DEFINES_STRUCT_TIMESPEC@
+UNISTD_H_HAVE_SYS_RANDOM_H = @UNISTD_H_HAVE_SYS_RANDOM_H@
+UNISTD_H_HAVE_WINSOCK2_H = @UNISTD_H_HAVE_WINSOCK2_H@
+UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS = @UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
+USE_NLS = @USE_NLS@
+VERSION = @VERSION@
+WARN_CFLAGS = @WARN_CFLAGS@
+WCHAR_T_SUFFIX = @WCHAR_T_SUFFIX@
+WERROR_CFLAGS = @WERROR_CFLAGS@
+WINDOWS_64_BIT_OFF_T = @WINDOWS_64_BIT_OFF_T@
+WINDOWS_64_BIT_ST_SIZE = @WINDOWS_64_BIT_ST_SIZE@
+WINDOWS_STAT_INODES = @WINDOWS_STAT_INODES@
+WINDOWS_STAT_TIMESPEC = @WINDOWS_STAT_TIMESPEC@
+WINT_T_SUFFIX = @WINT_T_SUFFIX@
+XGETTEXT = @XGETTEXT@
+XGETTEXT_015 = @XGETTEXT_015@
+XGETTEXT_EXTRA_OPTIONS = @XGETTEXT_EXTRA_OPTIONS@
+abs_aux_dir = @abs_aux_dir@
+abs_builddir = @abs_builddir@
+abs_srcdir = @abs_srcdir@
+abs_top_builddir = @abs_top_builddir@
+abs_top_srcdir = @abs_top_srcdir@
+ac_ct_CC = @ac_ct_CC@
+am__include = @am__include@
+am__leading_dot = @am__leading_dot@
+am__quote = @am__quote@
+am__tar = @am__tar@
+am__untar = @am__untar@
+bindir = @bindir@
+build = @build@
+build_alias = @build_alias@
+build_cpu = @build_cpu@
+build_os = @build_os@
+build_vendor = @build_vendor@
+builddir = @builddir@
+datadir = @datadir@
+datarootdir = @datarootdir@
+docdir = @docdir@
+dvidir = @dvidir@
+exec_prefix = @exec_prefix@
+gl_LIBOBJS = @gl_LIBOBJS@
+gl_LTLIBOBJS = @gl_LTLIBOBJS@
+gltests_LIBOBJS = @gltests_LIBOBJS@
+gltests_LTLIBOBJS = @gltests_LTLIBOBJS@
+gltests_WITNESS = @gltests_WITNESS@
+host = @host@
+host_alias = @host_alias@
+host_cpu = @host_cpu@
+host_os = @host_os@
+host_vendor = @host_vendor@
+htmldir = @htmldir@
+includedir = @includedir@
+infodir = @infodir@
+install_sh = @install_sh@
+libdir = @libdir@
+libexecdir = @libexecdir@
+lispdir = @lispdir@
+localedir = $(datadir)/locale
+localstatedir = @localstatedir@
+mandir = @mandir@
+mkdir_p = @mkdir_p@
+oldincludedir = @oldincludedir@
+pdfdir = @pdfdir@
+prefix = @prefix@
+program_transform_name = @program_transform_name@
+psdir = @psdir@
+runstatedir = @runstatedir@
+sbindir = @sbindir@
+sharedstatedir = @sharedstatedir@
+srcdir = @srcdir@
+sysconfdir = @sysconfdir@
+target_alias = @target_alias@
+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+LN = ln
+AM_CFLAGS = $(WARN_CFLAGS) $(WERROR_CFLAGS) $(PCRE_CFLAGS)
+
+# Tell the linker to omit references to unused shared libraries.
+AM_LDFLAGS = $(IGNORE_UNUSED_LIBRARIES_CFLAGS)
+bin_SCRIPTS = egrep fgrep
+grep_SOURCES = dfasearch.c die.h grep.c kwsearch.c kwset.c \
+	searchutils.c $(am__append_1)
+noinst_HEADERS = grep.h kwset.h search.h system.h
+
+# Sometimes, the expansion of $(LIBINTL) includes -lc which may
+# include modules defining variables like 'optind', so libgreputils.a
+# must precede $(LIBINTL) in order to ensure we use GNU getopt.
+# But libgreputils.a must also follow $(LIBINTL), since libintl uses
+# replacement functions defined in libgreputils.a.
+LDADD = \
+  ../lib/libgreputils.a $(LIBINTL) ../lib/libgreputils.a $(LIBICONV) \
+  $(LIBTHREAD)
+
+grep_LDADD = $(LDADD) $(PCRE_LIBS) $(LIBCSTACK)
+AM_CPPFLAGS = -I$(top_builddir)/lib -I$(top_srcdir)/lib
+EXTRA_DIST = egrep.sh
+CLEANFILES = egrep fgrep *-t
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .o .obj
+$(srcdir)/Makefile.in:  $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu src/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu src/Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure:  $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4):  $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+install-binPROGRAMS: $(bin_PROGRAMS)
+	@$(NORMAL_INSTALL)
+	@list='$(bin_PROGRAMS)'; test -n "$(bindir)" || list=; \
+	if test -n "$$list"; then \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(bindir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(bindir)" || exit 1; \
+	fi; \
+	for p in $$list; do echo "$$p $$p"; done | \
+	sed 's/$(EXEEXT)$$//' | \
+	while read p p1; do if test -f $$p \
+	  ; then echo "$$p"; echo "$$p"; else :; fi; \
+	done | \
+	sed -e 'p;s,.*/,,;n;h' \
+	    -e 's|.*|.|' \
+	    -e 'p;x;s,.*/,,;s/$(EXEEXT)$$//;$(transform);s/$$/$(EXEEXT)/' | \
+	sed 'N;N;N;s,\n, ,g' | \
+	$(AWK) 'BEGIN { files["."] = ""; dirs["."] = 1 } \
+	  { d=$$3; if (dirs[d] != 1) { print "d", d; dirs[d] = 1 } \
+	    if ($$2 == $$4) files[d] = files[d] " " $$1; \
+	    else { print "f", $$3 "/" $$4, $$1; } } \
+	  END { for (d in files) print "f", d, files[d] }' | \
+	while read type dir files; do \
+	    if test "$$dir" = .; then dir=; else dir=/$$dir; fi; \
+	    test -z "$$files" || { \
+	      echo " $(INSTALL_PROGRAM_ENV) $(INSTALL_PROGRAM) $$files '$(DESTDIR)$(bindir)$$dir'"; \
+	      $(INSTALL_PROGRAM_ENV) $(INSTALL_PROGRAM) $$files "$(DESTDIR)$(bindir)$$dir" || exit $$?; \
+	    } \
+	; done
+
+uninstall-binPROGRAMS:
+	@$(NORMAL_UNINSTALL)
+	@list='$(bin_PROGRAMS)'; test -n "$(bindir)" || list=; \
+	files=`for p in $$list; do echo "$$p"; done | \
+	  sed -e 'h;s,^.*/,,;s/$(EXEEXT)$$//;$(transform)' \
+	      -e 's/$$/$(EXEEXT)/' \
+	`; \
+	test -n "$$list" || exit 0; \
+	echo " ( cd '$(DESTDIR)$(bindir)' && rm -f" $$files ")"; \
+	cd "$(DESTDIR)$(bindir)" && rm -f $$files
+
+clean-binPROGRAMS:
+	-test -z "$(bin_PROGRAMS)" || rm -f $(bin_PROGRAMS)
+
+grep$(EXEEXT): $(grep_OBJECTS) $(grep_DEPENDENCIES) $(EXTRA_grep_DEPENDENCIES) 
+	@rm -f grep$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(grep_OBJECTS) $(grep_LDADD) $(LIBS)
+install-binSCRIPTS: $(bin_SCRIPTS)
+	@$(NORMAL_INSTALL)
+	@list='$(bin_SCRIPTS)'; test -n "$(bindir)" || list=; \
+	if test -n "$$list"; then \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(bindir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(bindir)" || exit 1; \
+	fi; \
+	for p in $$list; do \
+	  if test -f "$$p"; then d=; else d="$(srcdir)/"; fi; \
+	  if test -f "$$d$$p"; then echo "$$d$$p"; echo "$$p"; else :; fi; \
+	done | \
+	sed -e 'p;s,.*/,,;n' \
+	    -e 'h;s|.*|.|' \
+	    -e 'p;x;s,.*/,,;$(transform)' | sed 'N;N;N;s,\n, ,g' | \
+	$(AWK) 'BEGIN { files["."] = ""; dirs["."] = 1; } \
+	  { d=$$3; if (dirs[d] != 1) { print "d", d; dirs[d] = 1 } \
+	    if ($$2 == $$4) { files[d] = files[d] " " $$1; \
+	      if (++n[d] == $(am__install_max)) { \
+		print "f", d, files[d]; n[d] = 0; files[d] = "" } } \
+	    else { print "f", d "/" $$4, $$1 } } \
+	  END { for (d in files) print "f", d, files[d] }' | \
+	while read type dir files; do \
+	     if test "$$dir" = .; then dir=; else dir=/$$dir; fi; \
+	     test -z "$$files" || { \
+	       echo " $(INSTALL_SCRIPT) $$files '$(DESTDIR)$(bindir)$$dir'"; \
+	       $(INSTALL_SCRIPT) $$files "$(DESTDIR)$(bindir)$$dir" || exit $$?; \
+	     } \
+	; done
+
+uninstall-binSCRIPTS:
+	@$(NORMAL_UNINSTALL)
+	@list='$(bin_SCRIPTS)'; test -n "$(bindir)" || exit 0; \
+	files=`for p in $$list; do echo "$$p"; done | \
+	       sed -e 's,.*/,,;$(transform)'`; \
+	dir='$(DESTDIR)$(bindir)'; $(am__uninstall_files_from_dir)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dfasearch.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/grep.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/kwsearch.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/kwset.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/pcresearch.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/searchutils.Po@am__quote@ # am--include-marker
+
+$(am__depfiles_remade):
+	@$(MKDIR_P) $(@D)
+	@echo '# dummy' >$@-t && $(am__mv) $@-t $@
+
+am--depfiles: $(am__depfiles_remade)
+
+.c.o:
+@am__fastdepCC_TRUE@	$(AM_V_CC)depbase=`echo $@ | sed 's|[^/]*$$|$(DEPDIR)/&|;s|\.o$$||'`;\
+@am__fastdepCC_TRUE@	$(COMPILE) -MT $@ -MD -MP -MF $$depbase.Tpo -c -o $@ $< &&\
+@am__fastdepCC_TRUE@	$(am__mv) $$depbase.Tpo $$depbase.Po
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+ID: $(am__tagged_files)
+	$(am__define_uniq_tagged_files); mkid -fID $$unique
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+	here=`pwd`; \
+	$(am__define_uniq_tagged_files); \
+	shift; \
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+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: ctags-am
+
+CTAGS: ctags
+ctags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	$(am__define_uniq_tagged_files); \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
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+
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+	list='$(am__tagged_files)'; \
+	case "$(srcdir)" in \
+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
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+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(PROGRAMS) $(SCRIPTS) $(HEADERS)
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+	for dir in "$(DESTDIR)$(bindir)" "$(DESTDIR)$(bindir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
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+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-binPROGRAMS clean-generic mostlyclean-am
+
+distclean: distclean-am
+		-rm -f ./$(DEPDIR)/dfasearch.Po
+	-rm -f ./$(DEPDIR)/grep.Po
+	-rm -f ./$(DEPDIR)/kwsearch.Po
+	-rm -f ./$(DEPDIR)/kwset.Po
+	-rm -f ./$(DEPDIR)/pcresearch.Po
+	-rm -f ./$(DEPDIR)/searchutils.Po
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
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+
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+
+maintainer-clean: maintainer-clean-am
+		-rm -f ./$(DEPDIR)/dfasearch.Po
+	-rm -f ./$(DEPDIR)/grep.Po
+	-rm -f ./$(DEPDIR)/kwsearch.Po
+	-rm -f ./$(DEPDIR)/kwset.Po
+	-rm -f ./$(DEPDIR)/pcresearch.Po
+	-rm -f ./$(DEPDIR)/searchutils.Po
+	-rm -f Makefile
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+
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+uninstall-am: uninstall-binPROGRAMS uninstall-binSCRIPTS
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+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+	clean-binPROGRAMS clean-generic cscopelist-am ctags ctags-am \
+	distclean distclean-compile distclean-generic distclean-tags \
+	distdir dvi dvi-am html html-am info info-am install \
+	install-am install-binPROGRAMS install-binSCRIPTS install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-man install-pdf install-pdf-am \
+	install-ps install-ps-am install-strip installcheck \
+	installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic pdf pdf-am ps ps-am tags tags-am uninstall \
+	uninstall-am uninstall-binPROGRAMS uninstall-binSCRIPTS
+
+.PRECIOUS: Makefile
+
+
+egrep fgrep: egrep.sh Makefile
+	$(AM_V_GEN)grep=`echo grep | sed -e '$(transform)'` &&		\
+	case $@ in egrep) option=-E;; fgrep) option=-F;; esac &&	\
+	shell_does_substrings='set x/y && d=$${1%/*} && test "$$d" = x' && \
+	if $(SHELL) -c "$$shell_does_substrings" 2>/dev/null; then	\
+	  edit_substring='s,X,X,';					\
+	else								\
+	  edit_substring='s,\$${0%/\*},`expr "X$$0" : '\''X\\(.*\\)/'\''`,g'; \
+	fi &&								\
+	sed -e 's|[@]SHELL@|$(SHELL)|g'					\
+	    -e "$$edit_substring"					\
+	    -e "s|[@]grep@|$$grep|g"					\
+	    -e "s|[@]option@|$$option|g" <$(srcdir)/egrep.sh >$@-t
+	$(AM_V_at)chmod +x $@-t
+	$(AM_V_at)mv $@-t $@
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/grep/src/dfasearch.c b/src/grep/src/dfasearch.c
new file mode 100644
index 0000000..d6afa8d
--- /dev/null
+++ b/src/grep/src/dfasearch.c
@@ -0,0 +1,590 @@
+/* dfasearch.c - searching subroutines using dfa and regex for grep.
+   Copyright 1992, 1998, 2000, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+/* Written August 1992 by Mike Haertel. */
+
+#include <config.h>
+#include "intprops.h"
+#include "search.h"
+#include "die.h"
+#include <error.h>
+
+struct dfa_comp
+{
+  /* KWset compiled pattern.  For GEAcompile, we compile
+     a list of strings, at least one of which is known to occur in
+     any string matching the regexp. */
+  kwset_t kwset;
+
+  /* DFA compiled regexp. */
+  struct dfa *dfa;
+
+  /* Regex compiled regexps. */
+  struct re_pattern_buffer *patterns;
+  size_t pcount;
+  struct re_registers regs;
+
+  /* Number of compiled fixed strings known to exactly match the regexp.
+     If kwsexec returns < kwset_exact_matches, then we don't need to
+     call the regexp matcher at all. */
+  ptrdiff_t kwset_exact_matches;
+
+  bool begline;
+};
+
+void
+dfaerror (char const *mesg)
+{
+  die (EXIT_TROUBLE, 0, "%s", mesg);
+}
+
+/* For now, the sole dfawarn-eliciting condition (use of a regexp
+   like '[:lower:]') is unequivocally an error, so treat it as such,
+   when possible.  */
+void
+dfawarn (char const *mesg)
+{
+  if (!getenv ("POSIXLY_CORRECT"))
+    dfaerror (mesg);
+}
+
+/* If the DFA turns out to have some set of fixed strings one of
+   which must occur in the match, then we build a kwset matcher
+   to find those strings, and thus quickly filter out impossible
+   matches. */
+static void
+kwsmusts (struct dfa_comp *dc)
+{
+  struct dfamust *dm = dfamust (dc->dfa);
+  if (!dm)
+    return;
+  dc->kwset = kwsinit (false);
+  if (dm->exact)
+    {
+      /* Prepare a substring whose presence implies a match.
+         The kwset matcher will return the index of the matching
+         string that it chooses. */
+      ++dc->kwset_exact_matches;
+      ptrdiff_t old_len = strlen (dm->must);
+      ptrdiff_t new_len = old_len + dm->begline + dm->endline;
+      char *must = xmalloc (new_len);
+      char *mp = must;
+      *mp = eolbyte;
+      mp += dm->begline;
+      dc->begline |= dm->begline;
+      memcpy (mp, dm->must, old_len);
+      if (dm->endline)
+        mp[old_len] = eolbyte;
+      kwsincr (dc->kwset, must, new_len);
+      free (must);
+    }
+  else
+    {
+      /* Otherwise, filtering with this substring should help reduce the
+         search space, but we'll still have to use the regexp matcher.  */
+      kwsincr (dc->kwset, dm->must, strlen (dm->must));
+    }
+  kwsprep (dc->kwset);
+  dfamustfree (dm);
+}
+
+/* Return true if KEYS, of length LEN, might contain a back-reference.
+   Return false if KEYS cannot contain a back-reference.
+   BS_SAFE is true of encodings where a backslash cannot appear as the
+   last byte of a multibyte character.  */
+static bool _GL_ATTRIBUTE_PURE
+possible_backrefs_in_pattern (char const *keys, ptrdiff_t len, bool bs_safe)
+{
+  /* Normally a backslash, but in an unsafe encoding this is a non-char
+     value so that the comparison below always fails, because if there
+     are two adjacent '\' bytes, the first might be the last byte of a
+     multibyte character.  */
+  int second_backslash = bs_safe ? '\\' : CHAR_MAX + 1;
+
+  /* This code can return true even if KEYS lacks a back-reference, for
+     patterns like [\2], or for encodings where '\' appears as the last
+     byte of a multibyte character.  However, false alarms should be
+     rare and do not affect correctness.  */
+
+  /* Do not look for a backslash in the pattern's last byte, since it
+     can't be part of a back-reference and this streamlines the code.  */
+  len--;
+
+  if (0 <= len)
+    {
+      char const *lim = keys + len;
+      for (char const *p = keys; (p = memchr (p, '\\', lim - p)); p++)
+        {
+          if ('1' <= p[1] && p[1] <= '9')
+            return true;
+          if (p[1] == second_backslash)
+            {
+              p++;
+              if (p == lim)
+                break;
+            }
+        }
+    }
+  return false;
+}
+
+static bool
+regex_compile (struct dfa_comp *dc, char const *p, ptrdiff_t len,
+               ptrdiff_t pcount, ptrdiff_t lineno, reg_syntax_t syntax_bits,
+               bool syntax_only)
+{
+  struct re_pattern_buffer pat0;
+  struct re_pattern_buffer *pat = syntax_only ? &pat0 : &dc->patterns[pcount];
+  pat->buffer = NULL;
+  pat->allocated = 0;
+
+  /* Do not use a fastmap with -i, to work around glibc Bug#20381.  */
+  pat->fastmap = (syntax_only | match_icase) ? NULL : xmalloc (UCHAR_MAX + 1);
+
+  pat->translate = NULL;
+
+  if (syntax_only)
+    re_set_syntax (syntax_bits | RE_NO_SUB);
+  else
+    re_set_syntax (syntax_bits);
+
+  char const *err = re_compile_pattern (p, len, pat);
+  if (!err)
+    return true;
+
+  /* Emit a filename:lineno: prefix for patterns taken from files.  */
+  size_t pat_lineno;
+  char const *pat_filename
+    = lineno < 0 ? "" : pattern_file_name (lineno, &pat_lineno);
+
+  if (*pat_filename == '\0')
+    error (0, 0, "%s", err);
+  else
+    error (0, 0, "%s:%zu: %s", pat_filename, pat_lineno, err);
+
+  return false;
+}
+
+/* Compile PATTERN, containing SIZE bytes that are followed by '\n'.
+   SYNTAX_BITS specifies whether PATTERN uses style -G, -E, or -A.
+   Return a description of the compiled pattern.  */
+
+void *
+GEAcompile (char *pattern, size_t size, reg_syntax_t syntax_bits,
+            bool exact)
+{
+  char *motif;
+  struct dfa_comp *dc = xcalloc (1, sizeof (*dc));
+
+  dc->dfa = dfaalloc ();
+
+  if (match_icase)
+    syntax_bits |= RE_ICASE;
+  int dfaopts = eolbyte ? 0 : DFA_EOL_NUL;
+  dfasyntax (dc->dfa, &localeinfo, syntax_bits, dfaopts);
+  bool bs_safe = !localeinfo.multibyte | localeinfo.using_utf8;
+
+  /* For GNU regex, pass the patterns separately to detect errors like
+     "[\nallo\n]\n", where the patterns are "[", "allo" and "]", and
+     this should be a syntax error.  The same for backref, where the
+     backref should be local to each pattern.  */
+  char const *p = pattern;
+  char const *patlim = pattern + size;
+  bool compilation_failed = false;
+
+  dc->patterns = xmalloc (sizeof *dc->patterns);
+  dc->patterns++;
+  dc->pcount = 0;
+  size_t palloc = 1;
+
+  char const *prev = pattern;
+
+  /* Buffer containing back-reference-free patterns.  */
+  char *buf = NULL;
+  ptrdiff_t buflen = 0;
+  size_t bufalloc = 0;
+
+  ptrdiff_t lineno = 0;
+
+  do
+    {
+      char const *sep = rawmemchr (p, '\n');
+      ptrdiff_t len = sep - p;
+
+      bool backref = possible_backrefs_in_pattern (p, len, bs_safe);
+
+      if (backref && prev < p)
+        {
+          ptrdiff_t prevlen = p - prev;
+          while (bufalloc < buflen + prevlen)
+            buf = x2realloc (buf, &bufalloc);
+          memcpy (buf + buflen, prev, prevlen);
+          buflen += prevlen;
+        }
+
+      /* Ensure room for at least two more patterns.  The extra one is
+         for the regex_compile that may be executed after this loop
+         exits, and its (unused) slot is patterns[-1] until then.  */
+      while (palloc <= dc->pcount + 1)
+        {
+          dc->patterns = x2nrealloc (dc->patterns - 1, &palloc,
+                                     sizeof *dc->patterns);
+          dc->patterns++;
+        }
+
+      re_set_syntax (syntax_bits);
+
+      if (!regex_compile (dc, p, len, dc->pcount, lineno, syntax_bits,
+                          !backref))
+        compilation_failed = true;
+
+      p = sep + 1;
+      lineno++;
+
+      if (backref)
+        {
+          dc->pcount++;
+          prev = p;
+        }
+    }
+  while (p <= patlim);
+
+  if (compilation_failed)
+    exit (EXIT_TROUBLE);
+
+  if (prev <= patlim)
+    {
+      if (pattern < prev)
+        {
+          ptrdiff_t prevlen = patlim - prev;
+          buf = xrealloc (buf, buflen + prevlen);
+          memcpy (buf + buflen, prev, prevlen);
+          buflen += prevlen;
+        }
+      else
+        {
+          buf = pattern;
+          buflen = size;
+        }
+    }
+
+  /* In the match_words and match_lines cases, we use a different pattern
+     for the DFA matcher that will quickly throw out cases that won't work.
+     Then if DFA succeeds we do some hairy stuff using the regex matcher
+     to decide whether the match should really count. */
+  if (match_words || match_lines)
+    {
+      static char const line_beg_no_bk[] = "^(";
+      static char const line_end_no_bk[] = ")$";
+      static char const word_beg_no_bk[] = "(^|[^[:alnum:]_])(";
+      static char const word_end_no_bk[] = ")([^[:alnum:]_]|$)";
+      static char const line_beg_bk[] = "^\\(";
+      static char const line_end_bk[] = "\\)$";
+      static char const word_beg_bk[] = "\\(^\\|[^[:alnum:]_]\\)\\(";
+      static char const word_end_bk[] = "\\)\\([^[:alnum:]_]\\|$\\)";
+      int bk = !(syntax_bits & RE_NO_BK_PARENS);
+      char *n = xmalloc (sizeof word_beg_bk - 1 + size + sizeof word_end_bk);
+
+      strcpy (n, match_lines ? (bk ? line_beg_bk : line_beg_no_bk)
+                             : (bk ? word_beg_bk : word_beg_no_bk));
+      size_t total = strlen (n);
+      memcpy (n + total, pattern, size);
+      total += size;
+      strcpy (n + total, match_lines ? (bk ? line_end_bk : line_end_no_bk)
+                                     : (bk ? word_end_bk : word_end_no_bk));
+      total += strlen (n + total);
+      pattern = motif = n;
+      size = total;
+    }
+  else
+    motif = NULL;
+
+  dfaparse (pattern, size, dc->dfa);
+  kwsmusts (dc);
+  dfacomp (NULL, 0, dc->dfa, 1);
+
+  if (buf != NULL)
+    {
+      if (exact || !dfasupported (dc->dfa))
+        {
+          dc->patterns--;
+          dc->pcount++;
+
+          if (!regex_compile (dc, buf, buflen, 0, -1, syntax_bits, false))
+            abort ();
+        }
+
+      if (buf != pattern)
+        free (buf);
+    }
+
+  free (motif);
+
+  return dc;
+}
+
+size_t
+EGexecute (void *vdc, char const *buf, size_t size, size_t *match_size,
+           char const *start_ptr)
+{
+  char const *buflim, *beg, *end, *ptr, *match, *best_match, *mb_start;
+  char eol = eolbyte;
+  regoff_t start;
+  size_t len, best_len;
+  struct kwsmatch kwsm;
+  size_t i;
+  struct dfa_comp *dc = vdc;
+  struct dfa *superset = dfasuperset (dc->dfa);
+  bool dfafast = dfaisfast (dc->dfa);
+
+  mb_start = buf;
+  buflim = buf + size;
+
+  for (beg = end = buf; end < buflim; beg = end)
+    {
+      end = buflim;
+
+      if (!start_ptr)
+        {
+          char const *next_beg, *dfa_beg = beg;
+          ptrdiff_t count = 0;
+          bool exact_kwset_match = false;
+          bool backref = false;
+
+          /* Try matching with KWset, if it's defined.  */
+          if (dc->kwset)
+            {
+              char const *prev_beg;
+
+              /* Find a possible match using the KWset matcher.  */
+              ptrdiff_t offset = kwsexec (dc->kwset, beg - dc->begline,
+                                          buflim - beg + dc->begline,
+                                          &kwsm, true);
+              if (offset < 0)
+                return offset;
+              match = beg + offset;
+              prev_beg = beg;
+
+              /* Narrow down to the line containing the possible match.  */
+              beg = memrchr (buf, eol, match - buf);
+              beg = beg ? beg + 1 : buf;
+              dfa_beg = beg;
+
+              /* Determine the end pointer to give the DFA next.  Typically
+                 this is after the first newline after MATCH; but if the KWset
+                 match is not exact, the DFA is fast, and the offset from
+                 PREV_BEG is less than 64 or (MATCH - PREV_BEG), this is the
+                 greater of the latter two values; this temporarily prefers
+                 the DFA to KWset.  */
+              exact_kwset_match = kwsm.index < dc->kwset_exact_matches;
+              if (exact_kwset_match || !dfafast
+                  || MAX (16, match - beg) < (match - prev_beg) >> 2)
+                {
+                  end = rawmemchr (match, eol);
+                  end++;
+                }
+              else if (MAX (16, match - beg) < (buflim - prev_beg) >> 2)
+                {
+                  end = rawmemchr (prev_beg + 4 * MAX (16, match - beg), eol);
+                  end++;
+                }
+              else
+                end = buflim;
+
+              if (exact_kwset_match)
+                {
+                  if (!localeinfo.multibyte | localeinfo.using_utf8)
+                    goto success;
+                  if (mb_start < beg)
+                    mb_start = beg;
+                  if (mb_goback (&mb_start, NULL, match, buflim) == 0)
+                    goto success;
+                  /* The matched line starts in the middle of a multibyte
+                     character.  Perform the DFA search starting from the
+                     beginning of the next character.  */
+                  dfa_beg = mb_start;
+                }
+            }
+
+          /* Try matching with the superset of DFA, if it's defined.  */
+          if (superset && !exact_kwset_match)
+            {
+              /* Keep using the superset while it reports multiline
+                 potential matches; this is more likely to be fast
+                 than falling back to KWset would be.  */
+              next_beg = dfaexec (superset, dfa_beg, (char *) end, 0,
+                                  &count, NULL);
+              if (next_beg == NULL || next_beg == end)
+                continue;
+
+              /* Narrow down to the line we've found.  */
+              if (count != 0)
+                {
+                  beg = memrchr (buf, eol, next_beg - buf);
+                  beg++;
+                  dfa_beg = beg;
+                }
+              end = rawmemchr (next_beg, eol);
+              end++;
+
+              count = 0;
+            }
+
+          /* Try matching with DFA.  */
+          next_beg = dfaexec (dc->dfa, dfa_beg, (char *) end, 0, &count,
+                              &backref);
+
+          /* If there's no match, or if we've matched the sentinel,
+             we're done.  */
+          if (next_beg == NULL || next_beg == end)
+            continue;
+
+          /* Narrow down to the line we've found.  */
+          if (count != 0)
+            {
+              beg = memrchr (buf, eol, next_beg - buf);
+              beg++;
+            }
+          end = rawmemchr (next_beg, eol);
+          end++;
+
+          /* Successful, no back-references encountered! */
+          if (!backref)
+            goto success;
+          ptr = beg;
+        }
+      else
+        {
+          /* We are looking for the leftmost (then longest) exact match.
+             We will go through the outer loop only once.  */
+          ptr = start_ptr;
+        }
+
+      /* If the "line" is longer than the maximum regexp offset,
+         die as if we've run out of memory.  */
+      if (TYPE_MAXIMUM (regoff_t) < end - beg - 1)
+        xalloc_die ();
+
+      /* Run the possible match through Regex.  */
+      best_match = end;
+      best_len = 0;
+      for (i = 0; i < dc->pcount; i++)
+        {
+          dc->patterns[i].not_eol = 0;
+          dc->patterns[i].newline_anchor = eolbyte == '\n';
+          start = re_search (&dc->patterns[i], beg, end - beg - 1,
+                             ptr - beg, end - ptr - 1, &dc->regs);
+          if (start < -1)
+            xalloc_die ();
+          else if (0 <= start)
+            {
+              len = dc->regs.end[0] - start;
+              match = beg + start;
+              if (match > best_match)
+                continue;
+              if (start_ptr && !match_words)
+                goto assess_pattern_match;
+              if ((!match_lines && !match_words)
+                  || (match_lines && len == end - ptr - 1))
+                {
+                  match = ptr;
+                  len = end - ptr;
+                  goto assess_pattern_match;
+                }
+              /* If -w and not -x, check whether the match aligns with
+                 word boundaries.  Do this iteratively because:
+                 (a) the line may contain more than one occurrence of the
+                 pattern, and
+                 (b) Several alternatives in the pattern might be valid at a
+                 given point, and we may need to consider a shorter one to
+                 find a word boundary.  */
+              if (!match_lines && match_words)
+                while (match <= best_match)
+                  {
+                    regoff_t shorter_len = 0;
+                    if (! wordchar_next (match + len, end - 1)
+                        && ! wordchar_prev (beg, match, end - 1))
+                      goto assess_pattern_match;
+                    if (len > 0)
+                      {
+                        /* Try a shorter length anchored at the same place. */
+                        --len;
+                        dc->patterns[i].not_eol = 1;
+                        shorter_len = re_match (&dc->patterns[i], beg,
+                                                match + len - ptr, match - beg,
+                                                &dc->regs);
+                        if (shorter_len < -1)
+                          xalloc_die ();
+                      }
+                    if (0 < shorter_len)
+                      len = shorter_len;
+                    else
+                      {
+                        /* Try looking further on. */
+                        if (match == end - 1)
+                          break;
+                        match++;
+                        dc->patterns[i].not_eol = 0;
+                        start = re_search (&dc->patterns[i], beg, end - beg - 1,
+                                           match - beg, end - match - 1,
+                                           &dc->regs);
+                        if (start < 0)
+                          {
+                            if (start < -1)
+                              xalloc_die ();
+                            break;
+                          }
+                        len = dc->regs.end[0] - start;
+                        match = beg + start;
+                      }
+                  } /* while (match <= best_match) */
+              continue;
+            assess_pattern_match:
+              if (!start_ptr)
+                {
+                  /* Good enough for a non-exact match.
+                     No need to look at further patterns, if any.  */
+                  goto success;
+                }
+              if (match < best_match || (match == best_match && len > best_len))
+                {
+                  /* Best exact match:  leftmost, then longest.  */
+                  best_match = match;
+                  best_len = len;
+                }
+            } /* if re_search >= 0 */
+        } /* for Regex patterns.  */
+        if (best_match < end)
+          {
+            /* We have found an exact match.  We were just
+               waiting for the best one (leftmost then longest).  */
+            beg = best_match;
+            len = best_len;
+            goto success_in_len;
+          }
+    } /* for (beg = end ..) */
+
+  return -1;
+
+ success:
+  len = end - beg;
+ success_in_len:;
+  size_t off = beg - buf;
+  *match_size = len;
+  return off;
+}
diff --git a/src/grep/src/die.h b/src/grep/src/die.h
new file mode 100644
index 0000000..cc47c5a
--- /dev/null
+++ b/src/grep/src/die.h
@@ -0,0 +1,31 @@
+/* Report an error and exit.
+   Copyright 2016-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+#ifndef DIE_H
+#define DIE_H
+
+#include <error.h>
+#include <stdbool.h>
+#include <verify.h>
+
+/* Like 'error (STATUS, ...)', except STATUS must be a nonzero constant.
+   This may pacify the compiler or help it generate better code.  */
+#define die(status, ...) \
+  verify_expr (status, (error (status, __VA_ARGS__), assume (false)))
+
+#endif /* DIE_H */
diff --git a/src/grep/src/egrep.sh b/src/grep/src/egrep.sh
new file mode 100644
index 0000000..6d6c15a
--- /dev/null
+++ b/src/grep/src/egrep.sh
@@ -0,0 +1,2 @@
+#!@SHELL@
+exec @grep@ @option@ "$@"
diff --git a/src/grep/src/grep.c b/src/grep/src/grep.c
new file mode 100644
index 0000000..aabae2d
--- /dev/null
+++ b/src/grep/src/grep.c
@@ -0,0 +1,3173 @@
+/* grep.c - main driver file for grep.
+   Copyright (C) 1992, 1997-2002, 2004-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+/* Written July 1992 by Mike Haertel.  */
+
+#include <config.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <wchar.h>
+#include <inttypes.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include "system.h"
+
+#include "argmatch.h"
+#include "c-ctype.h"
+#include "c-stack.h"
+#include "closeout.h"
+#include "colorize.h"
+#include "die.h"
+#include "error.h"
+#include "exclude.h"
+#include "exitfail.h"
+#include "fcntl-safer.h"
+#if defined(KMK_GREP) && defined(KBUILD_OS_WINDOWS)
+# include "nt/fts-nt.h" /* Use NT optimized FTS implementation. */
+#else
+#include "fts_.h"
+#endif
+#include "getopt.h"
+#include "getprogname.h"
+#include "grep.h"
+#include "hash.h"
+#include "intprops.h"
+#include "propername.h"
+#include "safe-read.h"
+#include "search.h"
+#include "c-strcase.h"
+#include "version-etc.h"
+#include "xalloc.h"
+#include "xbinary-io.h"
+#include "xstrtol.h"
+
+#if defined(KMK_GREP) && defined(KBUILD_OS_WINDOWS)
+# include "console.h"
+#endif
+
+enum { SEP_CHAR_SELECTED = ':' };
+enum { SEP_CHAR_REJECTED = '-' };
+static char const SEP_STR_GROUP[] = "--";
+
+/* When stdout is connected to a regular file, save its stat
+   information here, so that we can automatically skip it, thus
+   avoiding a potential (racy) infinite loop.  */
+static struct stat out_stat;
+
+/* if non-zero, display usage information and exit */
+static int show_help;
+
+/* Print the version on standard output and exit.  */
+static bool show_version;
+
+/* Suppress diagnostics for nonexistent or unreadable files.  */
+static bool suppress_errors;
+
+/* If nonzero, use color markers.  */
+static int color_option;
+
+/* Show only the part of a line matching the expression. */
+static bool only_matching;
+
+/* If nonzero, make sure first content char in a line is on a tab stop. */
+static bool align_tabs;
+
+/* Print width of line numbers and byte offsets.  Nonzero if ALIGN_TABS.  */
+static int offset_width;
+
+/* An entry in the PATLOC array saying where patterns came from.  */
+struct patloc
+  {
+    /* Line number of the pattern in PATTERN_ARRAY.  Line numbers
+       start at 0, and each pattern is terminated by '\n'.  */
+    ptrdiff_t lineno;
+
+    /* Input location of the pattern.  The FILENAME "-" represents
+       standard input, and "" represents the command line.  FILELINE is
+       origin-1 for files and is irrelevant for the command line.  */
+    char const *filename;
+    ptrdiff_t fileline;
+  };
+
+/* The array of pattern locations.  The concatenation of all patterns
+   is stored in a single array, KEYS.  Given the invocation
+   'grep -f <(seq 5) -f <(seq 6) -f <(seq 3)', there will initially be
+   28 bytes in KEYS.  After duplicate patterns are removed, KEYS
+   will have 12 bytes and PATLOC will be {0,x,1}, {10,y,1}
+   where x, y and z are just place-holders for shell-generated names
+   since and z is omitted as it contains only duplicates.  Sometimes
+   removing duplicates will grow PATLOC, since each run of
+   removed patterns not at a file start or end requires another
+   PATLOC entry for the first non-removed pattern.  */
+static struct patloc *patloc;
+static size_t patlocs_allocated, patlocs_used;
+
+/* Pointer to the array of patterns, each terminated by newline.  */
+static char *pattern_array;
+
+/* The number of unique patterns seen so far.  */
+static size_t n_patterns;
+
+/* Hash table of patterns seen so far.  */
+static Hash_table *pattern_table;
+
+/* Hash and compare newline-terminated patterns for textual equality.
+   Patterns are represented by origin-1 offsets into PATTERN_ARRAY,
+   cast to void *.  The origin-1 is so that the first pattern offset
+   does not appear to be a null pointer when cast to void *.  */
+static size_t _GL_ATTRIBUTE_PURE
+hash_pattern (void const *pat, size_t n_buckets)
+{
+  size_t h = 0;
+  intptr_t pat_offset = (intptr_t) pat - 1;
+  unsigned char const *s = (unsigned char const *) pattern_array + pat_offset;
+  for ( ; *s != '\n'; s++)
+    h = h * 33 ^ *s;
+  return h % n_buckets;
+}
+static bool _GL_ATTRIBUTE_PURE
+compare_patterns (void const *a, void const *b)
+{
+  intptr_t a_offset = (intptr_t) a - 1;
+  intptr_t b_offset = (intptr_t) b - 1;
+  char const *p = pattern_array + a_offset;
+  char const *q = pattern_array + b_offset;
+  for (; *p == *q; p++, q++)
+    if (*p == '\n')
+      return true;
+  return false;
+}
+
+/* Update KEYS to remove duplicate patterns, and return the number of
+   bytes in the resulting KEYS.  KEYS contains a sequence of patterns
+   each terminated by '\n'.  The first DUPFREE_SIZE bytes are a
+   sequence of patterns with no duplicates; SIZE is the total number
+   of bytes in KEYS.  If some patterns past the first DUPFREE_SIZE
+   bytes are not duplicates, update PATLOCS accordingly.  */
+static ptrdiff_t
+update_patterns (char *keys, ptrdiff_t dupfree_size, ptrdiff_t size,
+                 char const *filename)
+{
+  char *dst = keys + dupfree_size;
+  ptrdiff_t fileline = 1;
+  int prev_inserted = 0;
+
+  char const *srclim = keys + size;
+  ptrdiff_t patsize;
+  for (char const *src = keys + dupfree_size; src < srclim; src += patsize)
+    {
+      char const *patend = rawmemchr (src, '\n');
+      patsize = patend + 1 - src;
+      memmove (dst, src, patsize);
+
+      intptr_t dst_offset_1 = dst - keys + 1;
+      int inserted = hash_insert_if_absent (pattern_table,
+                                            (void *) dst_offset_1, NULL);
+      if (inserted)
+        {
+          if (inserted < 0)
+            xalloc_die ();
+          dst += patsize;
+
+          /* Add a PATLOCS entry unless this input line is simply the
+             next one in the same file.  */
+          if (!prev_inserted)
+            {
+              if (patlocs_used == patlocs_allocated)
+                patloc = x2nrealloc (patloc, &patlocs_allocated,
+                                     sizeof *patloc);
+              patloc[patlocs_used++]
+                = (struct patloc) { .lineno = n_patterns,
+                                    .filename = filename,
+                                    .fileline = fileline };
+            }
+          n_patterns++;
+        }
+
+      prev_inserted = inserted;
+      fileline++;
+    }
+
+  return dst - keys;
+}
+
+/* Map LINENO, the origin-0 line number of one of the input patterns,
+   to the name of the file from which it came.  Return "-" if it was
+   read from stdin, "" if it was specified on the command line.
+   Set *NEW_LINENO to the origin-1 line number of PATTERN in the file,
+   or to an unspecified value if PATTERN came from the command line.  */
+char const * _GL_ATTRIBUTE_PURE
+pattern_file_name (size_t lineno, size_t *new_lineno)
+{
+  ptrdiff_t i;
+  for (i = 1; i < patlocs_used; i++)
+    if (lineno < patloc[i].lineno)
+      break;
+  *new_lineno = lineno - patloc[i - 1].lineno + patloc[i - 1].fileline;
+  return patloc[i - 1].filename;
+}
+
+#if HAVE_ASAN
+/* Record the starting address and length of the sole poisoned region,
+   so that we can unpoison it later, just before each following read.  */
+static void const *poison_buf;
+static size_t poison_len;
+
+static void
+clear_asan_poison (void)
+{
+  if (poison_buf)
+    __asan_unpoison_memory_region (poison_buf, poison_len);
+}
+
+static void
+asan_poison (void const *addr, size_t size)
+{
+  poison_buf = addr;
+  poison_len = size;
+
+  __asan_poison_memory_region (poison_buf, poison_len);
+}
+#else
+static void clear_asan_poison (void) { }
+static void asan_poison (void const volatile *addr, size_t size) { }
+#endif
+
+/* The group separator used when context is requested. */
+static const char *group_separator = SEP_STR_GROUP;
+
+/* The context and logic for choosing default --color screen attributes
+   (foreground and background colors, etc.) are the following.
+      -- There are eight basic colors available, each with its own
+         nominal luminosity to the human eye and foreground/background
+         codes (black [0 %, 30/40], blue [11 %, 34/44], red [30 %, 31/41],
+         magenta [41 %, 35/45], green [59 %, 32/42], cyan [70 %, 36/46],
+         yellow [89 %, 33/43], and white [100 %, 37/47]).
+      -- Sometimes, white as a background is actually implemented using
+         a shade of light gray, so that a foreground white can be visible
+         on top of it (but most often not).
+      -- Sometimes, black as a foreground is actually implemented using
+         a shade of dark gray, so that it can be visible on top of a
+         background black (but most often not).
+      -- Sometimes, more colors are available, as extensions.
+      -- Other attributes can be selected/deselected (bold [1/22],
+         underline [4/24], standout/inverse [7/27], blink [5/25], and
+         invisible/hidden [8/28]).  They are sometimes implemented by
+         using colors instead of what their names imply; e.g., bold is
+         often achieved by using brighter colors.  In practice, only bold
+         is really available to us, underline sometimes being mapped by
+         the terminal to some strange color choice, and standout best
+         being left for use by downstream programs such as less(1).
+      -- We cannot assume that any of the extensions or special features
+         are available for the purpose of choosing defaults for everyone.
+      -- The most prevalent default terminal backgrounds are pure black
+         and pure white, and are not necessarily the same shades of
+         those as if they were selected explicitly with SGR sequences.
+         Some terminals use dark or light pictures as default background,
+         but those are covered over by an explicit selection of background
+         color with an SGR sequence; their users will appreciate their
+         background pictures not be covered like this, if possible.
+      -- Some uses of colors attributes is to make some output items
+         more understated (e.g., context lines); this cannot be achieved
+         by changing the background color.
+      -- For these reasons, the grep color defaults should strive not
+         to change the background color from its default, unless it's
+         for a short item that should be highlighted, not understated.
+      -- The grep foreground color defaults (without an explicitly set
+         background) should provide enough contrast to be readable on any
+         terminal with either a black (dark) or white (light) background.
+         This only leaves red, magenta, green, and cyan (and their bold
+         counterparts) and possibly bold blue.  */
+/* The color strings used for matched text.
+   The user can overwrite them using the deprecated
+   environment variable GREP_COLOR or the new GREP_COLORS.  */
+static const char *selected_match_color = "01;31";	/* bold red */
+static const char *context_match_color  = "01;31";	/* bold red */
+
+/* Other colors.  Defaults look damn good.  */
+static const char *filename_color = "35";	/* magenta */
+static const char *line_num_color = "32";	/* green */
+static const char *byte_num_color = "32";	/* green */
+static const char *sep_color      = "36";	/* cyan */
+static const char *selected_line_color = "";	/* default color pair */
+static const char *context_line_color  = "";	/* default color pair */
+
+/* Select Graphic Rendition (SGR, "\33[...m") strings.  */
+/* Also Erase in Line (EL) to Right ("\33[K") by default.  */
+/*    Why have EL to Right after SGR?
+         -- The behavior of line-wrapping when at the bottom of the
+            terminal screen and at the end of the current line is often
+            such that a new line is introduced, entirely cleared with
+            the current background color which may be different from the
+            default one (see the boolean back_color_erase terminfo(5)
+            capability), thus scrolling the display by one line.
+            The end of this new line will stay in this background color
+            even after reverting to the default background color with
+            "\33[m', unless it is explicitly cleared again with "\33[K"
+            (which is the behavior the user would instinctively expect
+            from the whole thing).  There may be some unavoidable
+            background-color flicker at the end of this new line because
+            of this (when timing with the monitor's redraw is just right).
+         -- The behavior of HT (tab, "\t") is usually the same as that of
+            Cursor Forward Tabulation (CHT) with a default parameter
+            of 1 ("\33[I"), i.e., it performs pure movement to the next
+            tab stop, without any clearing of either content or screen
+            attributes (including background color); try
+               printf 'asdfqwerzxcv\rASDF\tZXCV\n'
+            in a bash(1) shell to demonstrate this.  This is not what the
+            user would instinctively expect of HT (but is ok for CHT).
+            The instinctive behavior would include clearing the terminal
+            cells that are skipped over by HT with blank cells in the
+            current screen attributes, including background color;
+            the boolean dest_tabs_magic_smso terminfo(5) capability
+            indicates this saner behavior for HT, but only some rare
+            terminals have it (although it also indicates a special
+            glitch with standout mode in the Teleray terminal for which
+            it was initially introduced).  The remedy is to add "\33K"
+            after each SGR sequence, be it START (to fix the behavior
+            of any HT after that before another SGR) or END (to fix the
+            behavior of an HT in default background color that would
+            follow a line-wrapping at the bottom of the screen in another
+            background color, and to complement doing it after START).
+            Piping grep's output through a pager such as less(1) avoids
+            any HT problems since the pager performs tab expansion.
+
+      Generic disadvantages of this remedy are:
+         -- Some very rare terminals might support SGR but not EL (nobody
+            will use "grep --color" on a terminal that does not support
+            SGR in the first place).
+         -- Having these extra control sequences might somewhat complicate
+            the task of any program trying to parse "grep --color"
+            output in order to extract structuring information from it.
+      A specific disadvantage to doing it after SGR START is:
+         -- Even more possible background color flicker (when timing
+            with the monitor's redraw is just right), even when not at the
+            bottom of the screen.
+      There are no additional disadvantages specific to doing it after
+      SGR END.
+
+      It would be impractical for GNU grep to become a full-fledged
+      terminal program linked against ncurses or the like, so it will
+      not detect terminfo(5) capabilities.  */
+static const char *sgr_start = "\33[%sm\33[K";
+static const char *sgr_end   = "\33[m\33[K";
+
+/* SGR utility functions.  */
+static void
+pr_sgr_start (char const *s)
+{
+  if (*s)
+    print_start_colorize (sgr_start, s);
+}
+static void
+pr_sgr_end (char const *s)
+{
+  if (*s)
+    print_end_colorize (sgr_end);
+}
+static void
+pr_sgr_start_if (char const *s)
+{
+  if (color_option)
+    pr_sgr_start (s);
+}
+static void
+pr_sgr_end_if (char const *s)
+{
+  if (color_option)
+    pr_sgr_end (s);
+}
+
+struct color_cap
+  {
+    const char *name;
+    const char **var;
+    void (*fct) (void);
+  };
+
+static void
+color_cap_mt_fct (void)
+{
+  /* Our caller just set selected_match_color.  */
+  context_match_color = selected_match_color;
+}
+
+static void
+color_cap_rv_fct (void)
+{
+  /* By this point, it was 1 (or already -1).  */
+  color_option = -1;  /* That's still != 0.  */
+}
+
+static void
+color_cap_ne_fct (void)
+{
+  sgr_start = "\33[%sm";
+  sgr_end   = "\33[m";
+}
+
+/* For GREP_COLORS.  */
+static const struct color_cap color_dict[] =
+  {
+    { "mt", &selected_match_color, color_cap_mt_fct }, /* both ms/mc */
+    { "ms", &selected_match_color, NULL }, /* selected matched text */
+    { "mc", &context_match_color,  NULL }, /* context matched text */
+    { "fn", &filename_color,       NULL }, /* filename */
+    { "ln", &line_num_color,       NULL }, /* line number */
+    { "bn", &byte_num_color,       NULL }, /* byte (sic) offset */
+    { "se", &sep_color,            NULL }, /* separator */
+    { "sl", &selected_line_color,  NULL }, /* selected lines */
+    { "cx", &context_line_color,   NULL }, /* context lines */
+    { "rv", NULL,                  color_cap_rv_fct }, /* -v reverses sl/cx */
+    { "ne", NULL,                  color_cap_ne_fct }, /* no EL on SGR_* */
+    { NULL, NULL,                  NULL }
+  };
+
+/* Saved errno value from failed output functions on stdout.  */
+static int stdout_errno;
+
+#ifdef KMK_GREP
+# ifdef KBUILD_OS_WINDOWS
+#  include <assert.h>
+static void fwrite_errno (void const *, size_t, size_t);
+static int g_fStdOutIsConsole = -1; /* TRUE or FALSE; -1 if not initialize. */
+#endif
+
+/* Attempts to set the code page, leave the rest of the locale as default. */
+static void kmk_grep_set_codepage (const char *pszCodepage)
+{
+# ifdef KBUILD_OS_WINDOWS
+  /* Make sure it starts with a dot: */
+  char szDot[256];
+  if (pszCodepage[0] != '.')
+    {
+      snprintf (szDot, sizeof(szDot), ".%s", pszCodepage);
+      pszCodepage = szDot;
+    }
+
+  if (setlocale (LC_ALL, pszCodepage) == NULL)
+    error (0, errno, _("warning: setlocale (LC_ALL, \"%s\") failed"),
+           pszCodepage);
+
+  g_fStdOutIsConsole = -1; /* ensure this is reinitialized. */
+# endif
+}
+#endif /* KMK_GREP */
+
+static void
+putchar_errno (int c)
+{
+#if defined(KMK_GREP) && defined(KBUILD_OS_WINDOWS)
+  char ch = (char)c;
+  fwrite_errno (&ch, 1, 1);
+#else
+  if (putchar (c) < 0)
+    stdout_errno = errno;
+#endif
+}
+
+static void
+fputs_errno (char const *s)
+{
+#if defined(KMK_GREP) && defined(KBUILD_OS_WINDOWS)
+  fwrite_errno (s, 1, strlen (s));
+#else
+  if (fputs (s, stdout) < 0)
+    stdout_errno = errno;
+#endif
+}
+
+static void _GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD (1, 2)
+printf_errno (char const *format, ...)
+{
+  va_list ap;
+  va_start (ap, format);
+#if defined(KMK_GREP) && defined(KBUILD_OS_WINDOWS)
+  char szBuf[1024]; /* Only really used for a PRIuMAX number and maybe a newline.  */
+  int cch = vsnprintf (szBuf, sizeof (szBuf), format, ap);
+  assert (cch < sizeof(szBuf));
+  fwrite_errno (szBuf, 1, cch);
+#else
+  if (vfprintf (stdout, format, ap) < 0)
+    stdout_errno = errno;
+#endif
+  va_end (ap);
+}
+
+static void
+fwrite_errno (void const *ptr, size_t size, size_t nmemb)
+{
+#if defined(KMK_GREP) && defined(KBUILD_OS_WINDOWS)
+  /*
+   * This trick reduces the runtime of 'grep -r GNU .' in the grep source dir
+   * from just above 11 seconds to around 0.8 seconds.
+   *
+   * The trouble with the microsoft CRTs (both the old and the new UCRT), is
+   * that we end up writing one char at the time when writing to the console,
+   * which is a total performance killer. write_double_translated_ansi_nolock()
+   * and write_requires_double_translation_nolock() in lowio/write.cpp in the
+   * UCRT sources have further details.
+   */
+  static HANDLE s_hStdOut = INVALID_HANDLE_VALUE;
+  if (g_fStdOutIsConsole != -1)
+    { /* likely*/ }
+  else
+    {
+      DWORD fModeIgnored;
+      s_hStdOut          = (HANDLE)_get_osfhandle (fileno (stdout));
+      g_fStdOutIsConsole = GetConsoleMode (s_hStdOut, &fModeIgnored)
+                         ? TRUE : FALSE;
+      if (getenv ("KMK_GREP_CONSOLE_DEBUG"))
+        fprintf (stderr, "kmk_grep: hStdOut=%p %sconsole codepage=%u ansi=%u\n",
+                s_hStdOut, g_fStdOutIsConsole ? "" : "!",
+                get_crt_codepage (), get_ansi_codepage ());
+    }
+  if (g_fStdOutIsConsole == TRUE && size && nmemb)
+    {
+      size_t const cbToWrite = size * nmemb;
+      if (   cbToWrite < (size_t)INT_MAX / 4
+          && cbToWrite >= size
+          && cbToWrite >= nmemb)
+        {
+          /* ASSUME that one input byte won't be translated to more than one
+             surrogate pair, or two compound UTF-16 codepoints. */
+          wchar_t        awcBuf[1024];
+          wchar_t       *pawcFree = NULL;
+          wchar_t       *pawcBuf;
+          size_t         cwcBuf = cbToWrite * 2 + 16;
+          if (cwcBuf < sizeof(awcBuf) / sizeof(wchar_t))
+            {
+              cwcBuf = sizeof(awcBuf) / sizeof(wchar_t);
+              pawcBuf = awcBuf;
+            }
+          else
+              pawcFree = pawcBuf = (wchar_t *)malloc(cwcBuf * sizeof(wchar_t));
+          if (pawcBuf)
+            {
+              int cwcToWrite = MultiByteToWideChar(get_crt_codepage(),
+                                                   0 /*dwFlags*/,
+                                                   ptr, (int)cbToWrite,
+                                                   pawcBuf, (int)(cwcBuf - 1));
+              if (cwcToWrite > 0)
+                {
+                  pawcBuf[cwcToWrite] = '\0';
+
+                  /* Let the CRT do the rest.  At least the Visual C++ 2010 CRT
+                     sources indicates _cputws will do the right thing.  */
+                  fflush(stdout);
+                  int rc = _cputws(pawcBuf);
+                  if (pawcFree)
+                    free(pawcFree);
+                  if (rc != 0)
+                    stdout_errno = errno;
+                  return;
+                }
+              free(pawcFree);
+            }
+        }
+    }
+#endif
+  if (fwrite (ptr, size, nmemb, stdout) != nmemb)
+    stdout_errno = errno;
+}
+
+static void
+fflush_errno (void)
+{
+  if (fflush (stdout) != 0)
+    stdout_errno = errno;
+}
+
+static struct exclude *excluded_patterns[2];
+static struct exclude *excluded_directory_patterns[2];
+/* Short options.  */
+static char const short_options[] =
+"0123456789A:B:C:D:EFGHIPTUVX:abcd:e:f:hiLlm:noqRrsuvwxyZz";
+
+/* Non-boolean long options that have no corresponding short equivalents.  */
+enum
+{
+  BINARY_FILES_OPTION = CHAR_MAX + 1,
+  COLOR_OPTION,
+  EXCLUDE_DIRECTORY_OPTION,
+  EXCLUDE_OPTION,
+  EXCLUDE_FROM_OPTION,
+  GROUP_SEPARATOR_OPTION,
+  INCLUDE_OPTION,
+  LINE_BUFFERED_OPTION,
+  LABEL_OPTION,
+#ifdef KMK_GREP
+  UTF8_OPTION,
+  CODEPAGE_OPTION,
+#endif
+  NO_IGNORE_CASE_OPTION
+};
+
+/* Long options equivalences. */
+static struct option const long_options[] =
+{
+  {"basic-regexp",    no_argument, NULL, 'G'},
+  {"extended-regexp", no_argument, NULL, 'E'},
+  {"fixed-regexp",    no_argument, NULL, 'F'},
+  {"fixed-strings",   no_argument, NULL, 'F'},
+  {"perl-regexp",     no_argument, NULL, 'P'},
+  {"after-context", required_argument, NULL, 'A'},
+  {"before-context", required_argument, NULL, 'B'},
+  {"binary-files", required_argument, NULL, BINARY_FILES_OPTION},
+  {"byte-offset", no_argument, NULL, 'b'},
+  {"context", required_argument, NULL, 'C'},
+  {"color", optional_argument, NULL, COLOR_OPTION},
+  {"colour", optional_argument, NULL, COLOR_OPTION},
+  {"count", no_argument, NULL, 'c'},
+  {"devices", required_argument, NULL, 'D'},
+  {"directories", required_argument, NULL, 'd'},
+  {"exclude", required_argument, NULL, EXCLUDE_OPTION},
+  {"exclude-from", required_argument, NULL, EXCLUDE_FROM_OPTION},
+  {"exclude-dir", required_argument, NULL, EXCLUDE_DIRECTORY_OPTION},
+  {"file", required_argument, NULL, 'f'},
+  {"files-with-matches", no_argument, NULL, 'l'},
+  {"files-without-match", no_argument, NULL, 'L'},
+  {"group-separator", required_argument, NULL, GROUP_SEPARATOR_OPTION},
+  {"help", no_argument, &show_help, 1},
+  {"include", required_argument, NULL, INCLUDE_OPTION},
+  {"ignore-case", no_argument, NULL, 'i'},
+  {"no-ignore-case", no_argument, NULL, NO_IGNORE_CASE_OPTION},
+  {"initial-tab", no_argument, NULL, 'T'},
+  {"label", required_argument, NULL, LABEL_OPTION},
+  {"line-buffered", no_argument, NULL, LINE_BUFFERED_OPTION},
+  {"line-number", no_argument, NULL, 'n'},
+  {"line-regexp", no_argument, NULL, 'x'},
+  {"max-count", required_argument, NULL, 'm'},
+
+  {"no-filename", no_argument, NULL, 'h'},
+  {"no-group-separator", no_argument, NULL, GROUP_SEPARATOR_OPTION},
+  {"no-messages", no_argument, NULL, 's'},
+  {"null", no_argument, NULL, 'Z'},
+  {"null-data", no_argument, NULL, 'z'},
+  {"only-matching", no_argument, NULL, 'o'},
+  {"quiet", no_argument, NULL, 'q'},
+  {"recursive", no_argument, NULL, 'r'},
+  {"dereference-recursive", no_argument, NULL, 'R'},
+  {"regexp", required_argument, NULL, 'e'},
+  {"invert-match", no_argument, NULL, 'v'},
+  {"silent", no_argument, NULL, 'q'},
+  {"text", no_argument, NULL, 'a'},
+  {"binary", no_argument, NULL, 'U'},
+  {"unix-byte-offsets", no_argument, NULL, 'u'},
+  {"version", no_argument, NULL, 'V'},
+  {"with-filename", no_argument, NULL, 'H'},
+  {"word-regexp", no_argument, NULL, 'w'},
+#ifdef KMK_GREP
+  {"utf8", no_argument, NULL, UTF8_OPTION},
+  {"cp", required_argument, NULL, CODEPAGE_OPTION},
+  {"codepage", required_argument, NULL, CODEPAGE_OPTION},
+#endif
+  {0, 0, 0, 0}
+};
+
+/* Define flags declared in grep.h. */
+bool match_icase;
+bool match_words;
+bool match_lines;
+char eolbyte;
+
+/* For error messages. */
+/* The input file name, or (if standard input) null or a --label argument.  */
+static char const *filename;
+/* Omit leading "./" from file names in diagnostics.  */
+static bool omit_dot_slash;
+static bool errseen;
+
+/* True if output from the current input file has been suppressed
+   because an output line had an encoding error.  */
+static bool encoding_error_output;
+
+enum directories_type
+  {
+    READ_DIRECTORIES = 2,
+    RECURSE_DIRECTORIES,
+    SKIP_DIRECTORIES
+  };
+
+/* How to handle directories.  */
+static char const *const directories_args[] =
+{
+  "read", "recurse", "skip", NULL
+};
+static enum directories_type const directories_types[] =
+{
+  READ_DIRECTORIES, RECURSE_DIRECTORIES, SKIP_DIRECTORIES
+};
+ARGMATCH_VERIFY (directories_args, directories_types);
+
+static enum directories_type directories = READ_DIRECTORIES;
+
+enum { basic_fts_options = FTS_CWDFD | FTS_NOSTAT | FTS_TIGHT_CYCLE_CHECK };
+static int fts_options = basic_fts_options | FTS_COMFOLLOW | FTS_PHYSICAL;
+
+/* How to handle devices. */
+static enum
+  {
+    READ_COMMAND_LINE_DEVICES,
+    READ_DEVICES,
+    SKIP_DEVICES
+  } devices = READ_COMMAND_LINE_DEVICES;
+
+static bool grepfile (int, char const *, bool, bool);
+static bool grepdesc (int, bool);
+
+static bool
+is_device_mode (mode_t m)
+{
+  return S_ISCHR (m) || S_ISBLK (m) || S_ISSOCK (m) || S_ISFIFO (m);
+}
+
+static bool
+skip_devices (bool command_line)
+{
+  return (devices == SKIP_DEVICES
+          || ((devices == READ_COMMAND_LINE_DEVICES) & !command_line));
+}
+
+/* Return if ST->st_size is defined.  Assume the file is not a
+   symbolic link.  */
+static bool
+usable_st_size (struct stat const *st)
+{
+  return S_ISREG (st->st_mode) || S_TYPEISSHM (st) || S_TYPEISTMO (st);
+}
+
+/* Lame substitutes for SEEK_DATA and SEEK_HOLE on platforms lacking them.
+   Do not rely on these finding data or holes if they equal SEEK_SET.  */
+#ifndef SEEK_DATA
+enum { SEEK_DATA = SEEK_SET };
+#endif
+#ifndef SEEK_HOLE
+enum { SEEK_HOLE = SEEK_SET };
+#endif
+
+/* True if lseek with SEEK_CUR or SEEK_DATA failed on the current input.  */
+static bool seek_failed;
+static bool seek_data_failed;
+
+/* Functions we'll use to search. */
+typedef void *(*compile_fp_t) (char *, size_t, reg_syntax_t, bool);
+typedef size_t (*execute_fp_t) (void *, char const *, size_t, size_t *,
+                                char const *);
+static execute_fp_t execute;
+static void *compiled_pattern;
+
+char const *
+input_filename (void)
+{
+  if (!filename)
+    filename = _("(standard input)");
+  return filename;
+}
+
+/* Unless requested, diagnose an error about the input file.  */
+static void
+suppressible_error (int errnum)
+{
+  if (! suppress_errors)
+    error (0, errnum, "%s", input_filename ());
+  errseen = true;
+}
+
+/* If there has already been a write error, don't bother closing
+   standard output, as that might elicit a duplicate diagnostic.  */
+static void
+clean_up_stdout (void)
+{
+  if (! stdout_errno)
+    close_stdout ();
+}
+
+/* A cast to TYPE of VAL.  Use this when TYPE is a pointer type, VAL
+   is properly aligned for TYPE, and 'gcc -Wcast-align' cannot infer
+   the alignment and would otherwise complain about the cast.  */
+#if 4 < __GNUC__ + (6 <= __GNUC_MINOR__)
+# define CAST_ALIGNED(type, val)                           \
+    ({ __typeof__ (val) val_ = val;                        \
+       _Pragma ("GCC diagnostic push")                     \
+       _Pragma ("GCC diagnostic ignored \"-Wcast-align\"") \
+       (type) val_;                                        \
+       _Pragma ("GCC diagnostic pop")                      \
+    })
+#else
+# define CAST_ALIGNED(type, val) ((type) (val))
+#endif
+
+/* An unsigned type suitable for fast matching.  */
+typedef uintmax_t uword;
+static uword const uword_max = UINTMAX_MAX;
+
+struct localeinfo localeinfo;
+
+/* A mask to test for unibyte characters, with the pattern repeated to
+   fill a uword.  For a multibyte character encoding where
+   all bytes are unibyte characters, this is 0.  For UTF-8, this is
+   0x808080....  For encodings where unibyte characters have no discerned
+   pattern, this is all 1s.  The unsigned char C is a unibyte
+   character if C & UNIBYTE_MASK is zero.  If the uword W is the
+   concatenation of bytes, the bytes are all unibyte characters
+   if W & UNIBYTE_MASK is zero.  */
+static uword unibyte_mask;
+
+static void
+initialize_unibyte_mask (void)
+{
+  /* For each encoding error I that MASK does not already match,
+     accumulate I's most significant 1 bit by ORing it into MASK.
+     Although any 1 bit of I could be used, in practice high-order
+     bits work better.  */
+  unsigned char mask = 0;
+  int ms1b = 1;
+  for (int i = 1; i <= UCHAR_MAX; i++)
+    if ((localeinfo.sbclen[i] != 1) & ! (mask & i))
+      {
+        while (ms1b * 2 <= i)
+          ms1b *= 2;
+        mask |= ms1b;
+      }
+
+  /* Now MASK will detect any encoding-error byte, although it may
+     cry wolf and it may not be optimal.  Build a uword-length mask by
+     repeating MASK.  */
+  unibyte_mask = uword_max / UCHAR_MAX * mask;
+}
+
+/* Skip the easy bytes in a buffer that is guaranteed to have a sentinel
+   that is not easy, and return a pointer to the first non-easy byte.
+   The easy bytes all have UNIBYTE_MASK off.  */
+static char const * _GL_ATTRIBUTE_PURE
+skip_easy_bytes (char const *buf)
+{
+  /* Search a byte at a time until the pointer is aligned, then a
+     uword at a time until a match is found, then a byte at a time to
+     identify the exact byte.  The uword search may go slightly past
+     the buffer end, but that's benign.  */
+  char const *p;
+  uword const *s;
+  for (p = buf; (uintptr_t) p % sizeof (uword) != 0; p++)
+    if (to_uchar (*p) & unibyte_mask)
+      return p;
+  for (s = CAST_ALIGNED (uword const *, p); ! (*s & unibyte_mask); s++)
+    continue;
+  for (p = (char const *) s; ! (to_uchar (*p) & unibyte_mask); p++)
+    continue;
+  return p;
+}
+
+/* Return true if BUF, of size SIZE, has an encoding error.
+   BUF must be followed by at least sizeof (uword) bytes,
+   the first of which may be modified.  */
+static bool
+buf_has_encoding_errors (char *buf, size_t size)
+{
+  if (! unibyte_mask)
+    return false;
+
+  mbstate_t mbs = { 0 };
+  size_t clen;
+
+  buf[size] = -1;
+  for (char const *p = buf; (p = skip_easy_bytes (p)) < buf + size; p += clen)
+    {
+      clen = mbrlen (p, buf + size - p, &mbs);
+      if ((size_t) -2 <= clen)
+        return true;
+    }
+
+  return false;
+}
+
+
+/* Return true if BUF, of size SIZE, has a null byte.
+   BUF must be followed by at least one byte,
+   which may be arbitrarily written to or read from.  */
+static bool
+buf_has_nulls (char *buf, size_t size)
+{
+  buf[size] = 0;
+  return strlen (buf) != size;
+}
+
+/* Return true if a file is known to contain null bytes.
+   SIZE bytes have already been read from the file
+   with descriptor FD and status ST.  */
+static bool
+file_must_have_nulls (size_t size, int fd, struct stat const *st)
+{
+  /* If the file has holes, it must contain a null byte somewhere.  */
+  if (SEEK_HOLE != SEEK_SET && !seek_failed
+      && usable_st_size (st) && size < st->st_size)
+    {
+      off_t cur = size;
+      if (O_BINARY || fd == STDIN_FILENO)
+        {
+          cur = lseek (fd, 0, SEEK_CUR);
+          if (cur < 0)
+            return false;
+        }
+
+      /* Look for a hole after the current location.  */
+      off_t hole_start = lseek (fd, cur, SEEK_HOLE);
+      if (0 <= hole_start)
+        {
+          if (lseek (fd, cur, SEEK_SET) < 0)
+            suppressible_error (errno);
+          if (hole_start < st->st_size)
+            return true;
+        }
+    }
+
+  return false;
+}
+
+/* Convert STR to a nonnegative integer, storing the result in *OUT.
+   STR must be a valid context length argument; report an error if it
+   isn't.  Silently ceiling *OUT at the maximum value, as that is
+   practically equivalent to infinity for grep's purposes.  */
+static void
+context_length_arg (char const *str, intmax_t *out)
+{
+  switch (xstrtoimax (str, 0, 10, out, ""))
+    {
+    case LONGINT_OK:
+    case LONGINT_OVERFLOW:
+      if (0 <= *out)
+        break;
+      FALLTHROUGH;
+    default:
+      die (EXIT_TROUBLE, 0, "%s: %s", str,
+           _("invalid context length argument"));
+    }
+}
+
+/* Return the add_exclude options suitable for excluding a file name.
+   If COMMAND_LINE, it is a command-line file name.  */
+static int
+exclude_options (bool command_line)
+{
+  return EXCLUDE_WILDCARDS | (command_line ? 0 : EXCLUDE_ANCHORED);
+}
+
+/* Return true if the file with NAME should be skipped.
+   If COMMAND_LINE, it is a command-line argument.
+   If IS_DIR, it is a directory.  */
+static bool
+skipped_file (char const *name, bool command_line, bool is_dir)
+{
+  struct exclude **pats;
+  if (! is_dir)
+    pats = excluded_patterns;
+  else if (directories == SKIP_DIRECTORIES)
+    return true;
+  else if (command_line && omit_dot_slash)
+    return false;
+  else
+    pats = excluded_directory_patterns;
+  return pats[command_line] && excluded_file_name (pats[command_line], name);
+}
+
+/* Hairy buffering mechanism for grep.  The intent is to keep
+   all reads aligned on a page boundary and multiples of the
+   page size, unless a read yields a partial page.  */
+
+static char *buffer;		/* Base of buffer. */
+static size_t bufalloc;		/* Allocated buffer size, counting slop. */
+static int bufdesc;		/* File descriptor. */
+static char *bufbeg;		/* Beginning of user-visible stuff. */
+static char *buflim;		/* Limit of user-visible stuff. */
+static size_t pagesize;		/* alignment of memory pages */
+static off_t bufoffset;		/* Read offset.  */
+static off_t after_last_match;	/* Pointer after last matching line that
+                                   would have been output if we were
+                                   outputting characters. */
+static bool skip_nuls;		/* Skip '\0' in data.  */
+static bool skip_empty_lines;	/* Skip empty lines in data.  */
+static uintmax_t totalnl;	/* Total newline count before lastnl. */
+
+/* Initial buffer size, not counting slop. */
+enum { INITIAL_BUFSIZE = 96 * 1024 };
+
+/* Return VAL aligned to the next multiple of ALIGNMENT.  VAL can be
+   an integer or a pointer.  Both args must be free of side effects.  */
+#define ALIGN_TO(val, alignment) \
+  ((uintptr_t) (val) % (alignment) == 0 \
+   ? (val) \
+   : (val) + ((alignment) - (uintptr_t) (val) % (alignment)))
+
+/* Add two numbers that count input bytes or lines, and report an
+   error if the addition overflows.  */
+static uintmax_t
+add_count (uintmax_t a, uintmax_t b)
+{
+  uintmax_t sum = a + b;
+  if (sum < a)
+    die (EXIT_TROUBLE, 0, _("input is too large to count"));
+  return sum;
+}
+
+/* Return true if BUF (of size SIZE) is all zeros.  */
+static bool
+all_zeros (char const *buf, size_t size)
+{
+  for (char const *p = buf; p < buf + size; p++)
+    if (*p)
+      return false;
+  return true;
+}
+
+/* Reset the buffer for a new file, returning false if we should skip it.
+   Initialize on the first time through. */
+static bool
+reset (int fd, struct stat const *st)
+{
+  bufbeg = buflim = ALIGN_TO (buffer + 1, pagesize);
+  bufbeg[-1] = eolbyte;
+  bufdesc = fd;
+  bufoffset = fd == STDIN_FILENO ? lseek (fd, 0, SEEK_CUR) : 0;
+  seek_failed = bufoffset < 0;
+
+  /* Assume SEEK_DATA fails if SEEK_CUR does.  */
+  seek_data_failed = seek_failed;
+
+  if (seek_failed)
+    {
+      if (errno != ESPIPE)
+        {
+          suppressible_error (errno);
+          return false;
+        }
+      bufoffset = 0;
+    }
+  return true;
+}
+
+/* Read new stuff into the buffer, saving the specified
+   amount of old stuff.  When we're done, 'bufbeg' points
+   to the beginning of the buffer contents, and 'buflim'
+   points just after the end.  Return false if there's an error.  */
+static bool
+fillbuf (size_t save, struct stat const *st)
+{
+  size_t fillsize;
+  bool cc = true;
+  char *readbuf;
+  size_t readsize;
+
+  if (pagesize <= buffer + bufalloc - sizeof (uword) - buflim)
+    readbuf = buflim;
+  else
+    {
+      size_t minsize = save + pagesize;
+      size_t newsize;
+      size_t newalloc;
+      char *newbuf;
+
+      /* Grow newsize until it is at least as great as minsize.  */
+      for (newsize = bufalloc - pagesize - sizeof (uword);
+           newsize < minsize;
+           newsize *= 2)
+        if ((SIZE_MAX - pagesize - sizeof (uword)) / 2 < newsize)
+          xalloc_die ();
+
+      /* Try not to allocate more memory than the file size indicates,
+         as that might cause unnecessary memory exhaustion if the file
+         is large.  However, do not use the original file size as a
+         heuristic if we've already read past the file end, as most
+         likely the file is growing.  */
+      if (usable_st_size (st))
+        {
+          off_t to_be_read = st->st_size - bufoffset;
+          off_t maxsize_off = save + to_be_read;
+          if (0 <= to_be_read && to_be_read <= maxsize_off
+              && maxsize_off == (size_t) maxsize_off
+              && minsize <= (size_t) maxsize_off
+              && (size_t) maxsize_off < newsize)
+            newsize = maxsize_off;
+        }
+
+      /* Add enough room so that the buffer is aligned and has room
+         for byte sentinels fore and aft, and so that a uword can
+         be read aft.  */
+      newalloc = newsize + pagesize + sizeof (uword);
+
+      newbuf = bufalloc < newalloc ? xmalloc (bufalloc = newalloc) : buffer;
+      readbuf = ALIGN_TO (newbuf + 1 + save, pagesize);
+      size_t moved = save + 1;  /* Move the preceding byte sentinel too.  */
+      memmove (readbuf - moved, buflim - moved, moved);
+      if (newbuf != buffer)
+        {
+          free (buffer);
+          buffer = newbuf;
+        }
+    }
+
+  bufbeg = readbuf - save;
+
+  clear_asan_poison ();
+
+  readsize = buffer + bufalloc - sizeof (uword) - readbuf;
+  readsize -= readsize % pagesize;
+
+  while (true)
+    {
+      fillsize = safe_read (bufdesc, readbuf, readsize);
+      if (fillsize == SAFE_READ_ERROR)
+        {
+          fillsize = 0;
+          cc = false;
+        }
+      bufoffset += fillsize;
+
+      if (((fillsize == 0) | !skip_nuls) || !all_zeros (readbuf, fillsize))
+        break;
+      totalnl = add_count (totalnl, fillsize);
+
+      if (SEEK_DATA != SEEK_SET && !seek_data_failed)
+        {
+          /* Solaris SEEK_DATA fails with errno == ENXIO in a hole at EOF.  */
+          off_t data_start = lseek (bufdesc, bufoffset, SEEK_DATA);
+          if (data_start < 0 && errno == ENXIO
+              && usable_st_size (st) && bufoffset < st->st_size)
+            data_start = lseek (bufdesc, 0, SEEK_END);
+
+          if (data_start < 0)
+            seek_data_failed = true;
+          else
+            {
+              totalnl = add_count (totalnl, data_start - bufoffset);
+              bufoffset = data_start;
+            }
+        }
+    }
+
+  buflim = readbuf + fillsize;
+
+  /* Initialize the following word, because skip_easy_bytes and some
+     matchers read (but do not use) those bytes.  This avoids false
+     positive reports of these bytes being used uninitialized.  */
+  memset (buflim, 0, sizeof (uword));
+
+  /* Mark the part of the buffer not filled by the read or set by
+     the above memset call as ASAN-poisoned.  */
+  asan_poison (buflim + sizeof (uword),
+               bufalloc - (buflim - buffer) - sizeof (uword));
+
+  return cc;
+}
+
+/* Flags controlling the style of output. */
+static enum
+{
+  BINARY_BINARY_FILES,
+  TEXT_BINARY_FILES,
+  WITHOUT_MATCH_BINARY_FILES
+} binary_files;		/* How to handle binary files.  */
+
+/* Options for output as a list of matching/non-matching files */
+static enum
+{
+  LISTFILES_NONE,
+  LISTFILES_MATCHING,
+  LISTFILES_NONMATCHING,
+} list_files;
+
+/* Whether to output filenames.  1 means yes, 0 means no, and -1 means
+   'grep -r PATTERN FILE' was used and it is not known yet whether
+   FILE is a directory (which means yes) or not (which means no).  */
+static int out_file;
+
+static int filename_mask;	/* If zero, output nulls after filenames.  */
+static bool out_quiet;		/* Suppress all normal output. */
+static bool out_invert;		/* Print nonmatching stuff. */
+static bool out_line;		/* Print line numbers. */
+static bool out_byte;		/* Print byte offsets. */
+static intmax_t out_before;	/* Lines of leading context. */
+static intmax_t out_after;	/* Lines of trailing context. */
+static bool count_matches;	/* Count matching lines.  */
+static intmax_t max_count;	/* Max number of selected
+                                   lines from an input file.  */
+static bool line_buffered;	/* Use line buffering.  */
+static char *label = NULL;      /* Fake filename for stdin */
+
+
+/* Internal variables to keep track of byte count, context, etc. */
+static uintmax_t totalcc;	/* Total character count before bufbeg. */
+static char const *lastnl;	/* Pointer after last newline counted. */
+static char *lastout;		/* Pointer after last character output;
+                                   NULL if no character has been output
+                                   or if it's conceptually before bufbeg. */
+static intmax_t outleft;	/* Maximum number of selected lines.  */
+static intmax_t pending;	/* Pending lines of output.
+                                   Always kept 0 if out_quiet is true.  */
+static bool done_on_match;	/* Stop scanning file on first match.  */
+static bool exit_on_match;	/* Exit on first match.  */
+static bool dev_null_output;	/* Stdout is known to be /dev/null.  */
+static bool binary;		/* Use binary rather than text I/O.  */
+
+static void
+nlscan (char const *lim)
+{
+  size_t newlines = 0;
+  for (char const *beg = lastnl; beg < lim; beg++)
+    {
+      beg = memchr (beg, eolbyte, lim - beg);
+      if (!beg)
+        break;
+      newlines++;
+    }
+  totalnl = add_count (totalnl, newlines);
+  lastnl = lim;
+}
+
+/* Print the current filename.  */
+static void
+print_filename (void)
+{
+  pr_sgr_start_if (filename_color);
+  fputs_errno (input_filename ());
+  pr_sgr_end_if (filename_color);
+}
+
+/* Print a character separator.  */
+static void
+print_sep (char sep)
+{
+  pr_sgr_start_if (sep_color);
+  putchar_errno (sep);
+  pr_sgr_end_if (sep_color);
+}
+
+/* Print a line number or a byte offset.  */
+static void
+print_offset (uintmax_t pos, const char *color)
+{
+  pr_sgr_start_if (color);
+  printf_errno ("%*"PRIuMAX, offset_width, pos);
+  pr_sgr_end_if (color);
+}
+
+/* Print a whole line head (filename, line, byte).  The output data
+   starts at BEG and contains LEN bytes; it is followed by at least
+   sizeof (uword) bytes, the first of which may be temporarily modified.
+   The output data comes from what is perhaps a larger input line that
+   goes until LIM, where LIM[-1] is an end-of-line byte.  Use SEP as
+   the separator on output.
+
+   Return true unless the line was suppressed due to an encoding error.  */
+
+static bool
+print_line_head (char *beg, size_t len, char const *lim, char sep)
+{
+  if (binary_files != TEXT_BINARY_FILES)
+    {
+      char ch = beg[len];
+      bool encoding_errors = buf_has_encoding_errors (beg, len);
+      beg[len] = ch;
+      if (encoding_errors)
+        {
+          encoding_error_output = true;
+          return false;
+        }
+    }
+
+  if (out_file)
+    {
+      print_filename ();
+      if (filename_mask)
+        print_sep (sep);
+      else
+        putchar_errno (0);
+    }
+
+  if (out_line)
+    {
+      if (lastnl < lim)
+        {
+          nlscan (beg);
+          totalnl = add_count (totalnl, 1);
+          lastnl = lim;
+        }
+      print_offset (totalnl, line_num_color);
+      print_sep (sep);
+    }
+
+  if (out_byte)
+    {
+      uintmax_t pos = add_count (totalcc, beg - bufbeg);
+      print_offset (pos, byte_num_color);
+      print_sep (sep);
+    }
+
+  if (align_tabs && (out_file | out_line | out_byte) && len != 0)
+    putchar_errno ('\t');
+
+  return true;
+}
+
+static char *
+print_line_middle (char *beg, char *lim,
+                   const char *line_color, const char *match_color)
+{
+  size_t match_size;
+  size_t match_offset;
+  char *cur;
+  char *mid = NULL;
+  char *b;
+
+  for (cur = beg;
+       (cur < lim
+        && ((match_offset = execute (compiled_pattern, beg, lim - beg,
+                                     &match_size, cur)) != (size_t) -1));
+       cur = b + match_size)
+    {
+      b = beg + match_offset;
+
+      /* Avoid matching the empty line at the end of the buffer. */
+      if (b == lim)
+        break;
+
+      /* Avoid hanging on grep --color "" foo */
+      if (match_size == 0)
+        {
+          /* Make minimal progress; there may be further non-empty matches.  */
+          /* XXX - Could really advance by one whole multi-octet character.  */
+          match_size = 1;
+          if (!mid)
+            mid = cur;
+        }
+      else
+        {
+          /* This function is called on a matching line only,
+             but is it selected or rejected/context?  */
+          if (only_matching)
+            {
+              char sep = out_invert ? SEP_CHAR_REJECTED : SEP_CHAR_SELECTED;
+              if (! print_line_head (b, match_size, lim, sep))
+                return NULL;
+            }
+          else
+            {
+              pr_sgr_start (line_color);
+              if (mid)
+                {
+                  cur = mid;
+                  mid = NULL;
+                }
+              fwrite_errno (cur, 1, b - cur);
+            }
+
+          pr_sgr_start_if (match_color);
+          fwrite_errno (b, 1, match_size);
+          pr_sgr_end_if (match_color);
+          if (only_matching)
+            putchar_errno (eolbyte);
+        }
+    }
+
+  if (only_matching)
+    cur = lim;
+  else if (mid)
+    cur = mid;
+
+  return cur;
+}
+
+static char *
+print_line_tail (char *beg, const char *lim, const char *line_color)
+{
+  size_t eol_size;
+  size_t tail_size;
+
+  eol_size   = (lim > beg && lim[-1] == eolbyte);
+  eol_size  += (lim - eol_size > beg && lim[-(1 + eol_size)] == '\r');
+  tail_size  =  lim - eol_size - beg;
+
+  if (tail_size > 0)
+    {
+      pr_sgr_start (line_color);
+      fwrite_errno (beg, 1, tail_size);
+      beg += tail_size;
+      pr_sgr_end (line_color);
+    }
+
+  return beg;
+}
+
+static void
+prline (char *beg, char *lim, char sep)
+{
+  bool matching;
+  const char *line_color;
+  const char *match_color;
+
+  if (!only_matching)
+    if (! print_line_head (beg, lim - beg - 1, lim, sep))
+      return;
+
+  matching = (sep == SEP_CHAR_SELECTED) ^ out_invert;
+
+  if (color_option)
+    {
+      line_color = (((sep == SEP_CHAR_SELECTED)
+                     ^ (out_invert && (color_option < 0)))
+                    ? selected_line_color  : context_line_color);
+      match_color = (sep == SEP_CHAR_SELECTED
+                     ? selected_match_color : context_match_color);
+    }
+  else
+    line_color = match_color = NULL; /* Shouldn't be used.  */
+
+  if ((only_matching && matching)
+      || (color_option && (*line_color || *match_color)))
+    {
+      /* We already know that non-matching lines have no match (to colorize). */
+      if (matching && (only_matching || *match_color))
+        {
+          beg = print_line_middle (beg, lim, line_color, match_color);
+          if (! beg)
+            return;
+        }
+
+      if (!only_matching && *line_color)
+        {
+          /* This code is exercised at least when grep is invoked like this:
+             echo k| GREP_COLORS='sl=01;32' src/grep k --color=always  */
+          beg = print_line_tail (beg, lim, line_color);
+        }
+    }
+
+  if (!only_matching && lim > beg)
+    fwrite_errno (beg, 1, lim - beg);
+
+  if (line_buffered)
+    fflush_errno ();
+
+  if (stdout_errno)
+    die (EXIT_TROUBLE, stdout_errno, _("write error"));
+
+  lastout = lim;
+}
+
+/* Print pending lines of trailing context prior to LIM.  */
+static void
+prpending (char const *lim)
+{
+  if (!lastout)
+    lastout = bufbeg;
+  for (; 0 < pending && lastout < lim; pending--)
+    {
+      char *nl = rawmemchr (lastout, eolbyte);
+      prline (lastout, nl + 1, SEP_CHAR_REJECTED);
+    }
+}
+
+/* Output the lines between BEG and LIM.  Deal with context.  */
+static void
+prtext (char *beg, char *lim)
+{
+  static bool used;	/* Avoid printing SEP_STR_GROUP before any output.  */
+  char eol = eolbyte;
+
+  if (!out_quiet && pending > 0)
+    prpending (beg);
+
+  char *p = beg;
+
+  if (!out_quiet)
+    {
+      /* Deal with leading context.  */
+      char const *bp = lastout ? lastout : bufbeg;
+      intmax_t i;
+      for (i = 0; i < out_before; ++i)
+        if (p > bp)
+          do
+            --p;
+          while (p[-1] != eol);
+
+      /* Print the group separator unless the output is adjacent to
+         the previous output in the file.  */
+      if ((0 <= out_before || 0 <= out_after) && used
+          && p != lastout && group_separator)
+        {
+          pr_sgr_start_if (sep_color);
+          fputs_errno (group_separator);
+          pr_sgr_end_if (sep_color);
+          putchar_errno ('\n');
+        }
+
+      while (p < beg)
+        {
+          char *nl = rawmemchr (p, eol);
+          nl++;
+          prline (p, nl, SEP_CHAR_REJECTED);
+          p = nl;
+        }
+    }
+
+  intmax_t n;
+  if (out_invert)
+    {
+      /* One or more lines are output.  */
+      for (n = 0; p < lim && n < outleft; n++)
+        {
+          char *nl = rawmemchr (p, eol);
+          nl++;
+          if (!out_quiet)
+            prline (p, nl, SEP_CHAR_SELECTED);
+          p = nl;
+        }
+    }
+  else
+    {
+      /* Just one line is output.  */
+      if (!out_quiet)
+        prline (beg, lim, SEP_CHAR_SELECTED);
+      n = 1;
+      p = lim;
+    }
+
+  after_last_match = bufoffset - (buflim - p);
+  pending = out_quiet ? 0 : MAX (0, out_after);
+  used = true;
+  outleft -= n;
+}
+
+/* Replace all NUL bytes in buffer P (which ends at LIM) with EOL.
+   This avoids running out of memory when binary input contains a long
+   sequence of zeros, which would otherwise be considered to be part
+   of a long line.  P[LIM] should be EOL.  */
+static void
+zap_nuls (char *p, char *lim, char eol)
+{
+  if (eol)
+    while (true)
+      {
+        *lim = '\0';
+        p += strlen (p);
+        *lim = eol;
+        if (p == lim)
+          break;
+        do
+          *p++ = eol;
+        while (!*p);
+      }
+}
+
+/* Scan the specified portion of the buffer, matching lines (or
+   between matching lines if OUT_INVERT is true).  Return a count of
+   lines printed.  Replace all NUL bytes with NUL_ZAPPER as we go.  */
+static intmax_t
+grepbuf (char *beg, char const *lim)
+{
+  intmax_t outleft0 = outleft;
+  char *endp;
+
+  for (char *p = beg; p < lim; p = endp)
+    {
+      size_t match_size;
+      size_t match_offset = execute (compiled_pattern, p, lim - p,
+                                     &match_size, NULL);
+      if (match_offset == (size_t) -1)
+        {
+          if (!out_invert)
+            break;
+          match_offset = lim - p;
+          match_size = 0;
+        }
+      char *b = p + match_offset;
+      endp = b + match_size;
+      /* Avoid matching the empty line at the end of the buffer. */
+      if (!out_invert && b == lim)
+        break;
+      if (!out_invert || p < b)
+        {
+          char *prbeg = out_invert ? p : b;
+          char *prend = out_invert ? b : endp;
+          prtext (prbeg, prend);
+          if (!outleft || done_on_match)
+            {
+              if (exit_on_match)
+                exit (errseen ? exit_failure : EXIT_SUCCESS);
+              break;
+            }
+        }
+    }
+
+  return outleft0 - outleft;
+}
+
+/* Search a given (non-directory) file.  Return a count of lines printed.
+   Set *INEOF to true if end-of-file reached.  */
+static intmax_t
+grep (int fd, struct stat const *st, bool *ineof)
+{
+  intmax_t nlines, i;
+  size_t residue, save;
+  char oldc;
+  char *beg;
+  char *lim;
+  char eol = eolbyte;
+  char nul_zapper = '\0';
+  bool done_on_match_0 = done_on_match;
+  bool out_quiet_0 = out_quiet;
+
+  /* The value of NLINES when nulls were first deduced in the input;
+     this is not necessarily the same as the number of matching lines
+     before the first null.  -1 if no input nulls have been deduced.  */
+  intmax_t nlines_first_null = -1;
+
+  if (! reset (fd, st))
+    return 0;
+
+  totalcc = 0;
+  lastout = 0;
+  totalnl = 0;
+  outleft = max_count;
+  after_last_match = 0;
+  pending = 0;
+  skip_nuls = skip_empty_lines && !eol;
+  encoding_error_output = false;
+
+  nlines = 0;
+  residue = 0;
+  save = 0;
+
+  if (! fillbuf (save, st))
+    {
+      suppressible_error (errno);
+      return 0;
+    }
+
+  offset_width = 0;
+  if (align_tabs)
+    {
+      /* Width is log of maximum number.  Line numbers are origin-1.  */
+      uintmax_t num = usable_st_size (st) ? st->st_size : UINTMAX_MAX;
+      num += out_line && num < UINTMAX_MAX;
+      do
+        offset_width++;
+      while ((num /= 10) != 0);
+    }
+
+  for (bool firsttime = true; ; firsttime = false)
+    {
+      if (nlines_first_null < 0 && eol && binary_files != TEXT_BINARY_FILES
+          && (buf_has_nulls (bufbeg, buflim - bufbeg)
+              || (firsttime && file_must_have_nulls (buflim - bufbeg, fd, st))))
+        {
+          if (binary_files == WITHOUT_MATCH_BINARY_FILES)
+            return 0;
+          if (!count_matches)
+            done_on_match = out_quiet = true;
+          nlines_first_null = nlines;
+          nul_zapper = eol;
+          skip_nuls = skip_empty_lines;
+        }
+
+      lastnl = bufbeg;
+      if (lastout)
+        lastout = bufbeg;
+
+      beg = bufbeg + save;
+
+      /* no more data to scan (eof) except for maybe a residue -> break */
+      if (beg == buflim)
+        {
+          *ineof = true;
+          break;
+        }
+
+      zap_nuls (beg, buflim, nul_zapper);
+
+      /* Determine new residue (the length of an incomplete line at the end of
+         the buffer, 0 means there is no incomplete last line).  */
+      oldc = beg[-1];
+      beg[-1] = eol;
+      /* FIXME: use rawmemrchr if/when it exists, since we have ensured
+         that this use of memrchr is guaranteed never to return NULL.  */
+      lim = memrchr (beg - 1, eol, buflim - beg + 1);
+      ++lim;
+      beg[-1] = oldc;
+      if (lim == beg)
+        lim = beg - residue;
+      beg -= residue;
+      residue = buflim - lim;
+
+      if (beg < lim)
+        {
+          if (outleft)
+            nlines += grepbuf (beg, lim);
+          if (pending)
+            prpending (lim);
+          if ((!outleft && !pending)
+              || (done_on_match && MAX (0, nlines_first_null) < nlines))
+            goto finish_grep;
+        }
+
+      /* The last OUT_BEFORE lines at the end of the buffer will be needed as
+         leading context if there is a matching line at the begin of the
+         next data. Make beg point to their begin.  */
+      i = 0;
+      beg = lim;
+      while (i < out_before && beg > bufbeg && beg != lastout)
+        {
+          ++i;
+          do
+            --beg;
+          while (beg[-1] != eol);
+        }
+
+      /* Detect whether leading context is adjacent to previous output.  */
+      if (beg != lastout)
+        lastout = 0;
+
+      /* Handle some details and read more data to scan.  */
+      save = residue + lim - beg;
+      if (out_byte)
+        totalcc = add_count (totalcc, buflim - bufbeg - save);
+      if (out_line)
+        nlscan (beg);
+      if (! fillbuf (save, st))
+        {
+          suppressible_error (errno);
+          goto finish_grep;
+        }
+    }
+  if (residue)
+    {
+      *buflim++ = eol;
+      if (outleft)
+        nlines += grepbuf (bufbeg + save - residue, buflim);
+      if (pending)
+        prpending (buflim);
+    }
+
+ finish_grep:
+  done_on_match = done_on_match_0;
+  out_quiet = out_quiet_0;
+  if (binary_files == BINARY_BINARY_FILES && ! (out_quiet | suppress_errors)
+      && (encoding_error_output
+          || (0 <= nlines_first_null && nlines_first_null < nlines)))
+    error (0, 0, _("%s: binary file matches"), input_filename ());
+  return nlines;
+}
+
+static bool
+grepdirent (FTS *fts, FTSENT *ent, bool command_line)
+{
+  bool follow;
+  command_line &= ent->fts_level == FTS_ROOTLEVEL;
+
+  if (ent->fts_info == FTS_DP)
+    return true;
+
+  if (!command_line
+      && skipped_file (ent->fts_name, false,
+                       (ent->fts_info == FTS_D || ent->fts_info == FTS_DC
+                        || ent->fts_info == FTS_DNR)))
+    {
+      fts_set (fts, ent, FTS_SKIP);
+      return true;
+    }
+
+  filename = ent->fts_path;
+  if (omit_dot_slash && filename[1])
+    filename += 2;
+  follow = (fts->fts_options & FTS_LOGICAL
+            || (fts->fts_options & FTS_COMFOLLOW && command_line));
+
+  switch (ent->fts_info)
+    {
+    case FTS_D:
+      if (directories == RECURSE_DIRECTORIES)
+        return true;
+      fts_set (fts, ent, FTS_SKIP);
+      break;
+
+    case FTS_DC:
+      if (!suppress_errors)
+        error (0, 0, _("%s: warning: recursive directory loop"), filename);
+      return true;
+
+    case FTS_DNR:
+    case FTS_ERR:
+    case FTS_NS:
+      suppressible_error (ent->fts_errno);
+      return true;
+
+    case FTS_DEFAULT:
+    case FTS_NSOK:
+      if (skip_devices (command_line))
+        {
+          struct stat *st = ent->fts_statp;
+#if !defined(KMK_GREP) || !defined(_MSC_VER) /** @todo revisit this */
+          struct stat st1;
+          if (! st->st_mode)
+            {
+              /* The file type is not already known.  Get the file status
+                 before opening, since opening might have side effects
+                 on a device.  */
+              int flag = follow ? 0 : AT_SYMLINK_NOFOLLOW;
+              if (fstatat (fts->fts_cwd_fd, ent->fts_accpath, &st1, flag) != 0)
+                {
+                  suppressible_error (errno);
+                  return true;
+                }
+              st = &st1;
+            }
+#endif
+          if (is_device_mode (st->st_mode))
+            return true;
+        }
+      break;
+
+    case FTS_F:
+    case FTS_SLNONE:
+      break;
+
+    case FTS_SL:
+    case FTS_W:
+      return true;
+
+    default:
+      abort ();
+    }
+
+  return grepfile (fts->fts_cwd_fd, ent->fts_accpath, follow, command_line);
+}
+
+/* True if errno is ERR after 'open ("symlink", ... O_NOFOLLOW ...)'.
+   POSIX specifies ELOOP, but it's EMLINK on FreeBSD and EFTYPE on NetBSD.  */
+static bool
+open_symlink_nofollow_error (int err)
+{
+  if (err == ELOOP || err == EMLINK)
+    return true;
+#ifdef EFTYPE
+  if (err == EFTYPE)
+    return true;
+#endif
+  return false;
+}
+
+static bool
+grepfile (int dirdesc, char const *name, bool follow, bool command_line)
+{
+  int oflag = (O_RDONLY | O_NOCTTY
+               | (IGNORE_DUPLICATE_BRANCH_WARNING
+                  (binary ? O_BINARY : 0))
+               | (follow ? 0 : O_NOFOLLOW)
+               | (skip_devices (command_line) ? O_NONBLOCK : 0));
+  int desc = openat_safer (dirdesc, name, oflag);
+  if (desc < 0)
+    {
+      if (follow || ! open_symlink_nofollow_error (errno))
+        suppressible_error (errno);
+      return true;
+    }
+  return grepdesc (desc, command_line);
+}
+
+/* Read all data from FD, with status ST.  Return true if successful,
+   false (setting errno) otherwise.  */
+static bool
+drain_input (int fd, struct stat const *st)
+{
+  ssize_t nbytes;
+  if (S_ISFIFO (st->st_mode) && dev_null_output)
+    {
+#ifdef SPLICE_F_MOVE
+      /* Should be faster, since it need not copy data to user space.  */
+      nbytes = splice (fd, NULL, STDOUT_FILENO, NULL,
+                       INITIAL_BUFSIZE, SPLICE_F_MOVE);
+      if (0 <= nbytes || errno != EINVAL)
+        {
+          while (0 < nbytes)
+            nbytes = splice (fd, NULL, STDOUT_FILENO, NULL,
+                             INITIAL_BUFSIZE, SPLICE_F_MOVE);
+          return nbytes == 0;
+        }
+#endif
+    }
+  while ((nbytes = safe_read (fd, buffer, bufalloc)))
+    if (nbytes == SAFE_READ_ERROR)
+      return false;
+  return true;
+}
+
+/* Finish reading from FD, with status ST and where end-of-file has
+   been seen if INEOF.  Typically this is a no-op, but when reading
+   from standard input this may adjust the file offset or drain a
+   pipe.  */
+
+static void
+finalize_input (int fd, struct stat const *st, bool ineof)
+{
+  if (fd == STDIN_FILENO
+      && (outleft
+          ? (!ineof
+             && (seek_failed
+                 || (lseek (fd, 0, SEEK_END) < 0
+                     /* Linux proc file system has EINVAL (Bug#25180).  */
+                     && errno != EINVAL))
+             && ! drain_input (fd, st))
+          : (bufoffset != after_last_match && !seek_failed
+             && lseek (fd, after_last_match, SEEK_SET) < 0)))
+    suppressible_error (errno);
+}
+
+static bool
+grepdesc (int desc, bool command_line)
+{
+  intmax_t count;
+  bool status = true;
+  bool ineof = false;
+  struct stat st;
+
+  /* Get the file status, possibly for the second time.  This catches
+     a race condition if the directory entry changes after the
+     directory entry is read and before the file is opened.  For
+     example, normally DESC is a directory only at the top level, but
+     there is an exception if some other process substitutes a
+     directory for a non-directory while 'grep' is running.  */
+  if (fstat (desc, &st) != 0)
+    {
+      suppressible_error (errno);
+      goto closeout;
+    }
+
+  if (desc != STDIN_FILENO && skip_devices (command_line)
+      && is_device_mode (st.st_mode))
+    goto closeout;
+
+  if (desc != STDIN_FILENO && command_line
+      && skipped_file (filename, true, S_ISDIR (st.st_mode) != 0))
+    goto closeout;
+
+  /* Don't output file names if invoked as 'grep -r PATTERN NONDIRECTORY'.  */
+  if (out_file < 0)
+    out_file = !!S_ISDIR (st.st_mode);
+
+  if (desc != STDIN_FILENO
+      && directories == RECURSE_DIRECTORIES && S_ISDIR (st.st_mode))
+    {
+      /* Traverse the directory starting with its full name, because
+         unfortunately fts provides no way to traverse the directory
+         starting from its file descriptor.  */
+
+      FTS *fts;
+      FTSENT *ent;
+      int opts = fts_options & ~(command_line ? 0 : FTS_COMFOLLOW);
+      char *fts_arg[2];
+
+      /* Close DESC now, to conserve file descriptors if the race
+         condition occurs many times in a deep recursion.  */
+      if (close (desc) != 0)
+        suppressible_error (errno);
+
+      fts_arg[0] = (char *) filename;
+      fts_arg[1] = NULL;
+      fts = fts_open (fts_arg, opts, NULL);
+
+      if (!fts)
+        xalloc_die ();
+      while ((ent = fts_read (fts)))
+        status &= grepdirent (fts, ent, command_line);
+      if (errno)
+        suppressible_error (errno);
+      if (fts_close (fts) != 0)
+        suppressible_error (errno);
+      return status;
+    }
+  if (desc != STDIN_FILENO
+      && ((directories == SKIP_DIRECTORIES && S_ISDIR (st.st_mode))
+          || ((devices == SKIP_DEVICES
+               || (devices == READ_COMMAND_LINE_DEVICES && !command_line))
+              && is_device_mode (st.st_mode))))
+    goto closeout;
+
+  /* If there is a regular file on stdout and the current file refers
+     to the same i-node, we have to report the problem and skip it.
+     Otherwise when matching lines from some other input reach the
+     disk before we open this file, we can end up reading and matching
+     those lines and appending them to the file from which we're reading.
+     Then we'd have what appears to be an infinite loop that'd terminate
+     only upon filling the output file system or reaching a quota.
+     However, there is no risk of an infinite loop if grep is generating
+     no output, i.e., with --silent, --quiet, -q.
+     Similarly, with any of these:
+       --max-count=N (-m) (for N >= 2)
+       --files-with-matches (-l)
+       --files-without-match (-L)
+     there is no risk of trouble.
+     For --max-count=1, grep stops after printing the first match,
+     so there is no risk of malfunction.  But even --max-count=2, with
+     input==output, while there is no risk of infloop, there is a race
+     condition that could result in "alternate" output.  */
+  if (!out_quiet && list_files == LISTFILES_NONE && 1 < max_count
+      && S_ISREG (st.st_mode) && SAME_INODE (st, out_stat))
+    {
+      if (! suppress_errors)
+        error (0, 0, _("%s: input file is also the output"), input_filename ());
+      errseen = true;
+      goto closeout;
+    }
+
+  count = grep (desc, &st, &ineof);
+  if (count_matches)
+    {
+      if (out_file)
+        {
+          print_filename ();
+          if (filename_mask)
+            print_sep (SEP_CHAR_SELECTED);
+          else
+            putchar_errno (0);
+        }
+      printf_errno ("%" PRIdMAX "\n", count);
+      if (line_buffered)
+        fflush_errno ();
+    }
+
+  status = !count;
+
+  if (list_files == LISTFILES_NONE)
+    finalize_input (desc, &st, ineof);
+  else if (list_files == (status ? LISTFILES_NONMATCHING : LISTFILES_MATCHING))
+    {
+      print_filename ();
+      putchar_errno ('\n' & filename_mask);
+      if (line_buffered)
+        fflush_errno ();
+    }
+
+ closeout:
+  if (desc != STDIN_FILENO && close (desc) != 0)
+    suppressible_error (errno);
+  return status;
+}
+
+static bool
+grep_command_line_arg (char const *arg)
+{
+  if (STREQ (arg, "-"))
+    {
+      filename = label;
+      if (binary)
+        xset_binary_mode (STDIN_FILENO, O_BINARY);
+      return grepdesc (STDIN_FILENO, true);
+    }
+  else
+    {
+      filename = arg;
+      return grepfile (AT_FDCWD, arg, true, true);
+    }
+}
+
+_Noreturn void usage (int);
+void
+usage (int status)
+{
+  if (status != 0)
+    {
+      fprintf (stderr, _("Usage: %s [OPTION]... PATTERNS [FILE]...\n"),
+               getprogname ());
+      fprintf (stderr, _("Try '%s --help' for more information.\n"),
+               getprogname ());
+    }
+  else
+    {
+      printf (_("Usage: %s [OPTION]... PATTERNS [FILE]...\n"), getprogname ());
+      printf (_("Search for PATTERNS in each FILE.\n"));
+      printf (_("\
+Example: %s -i 'hello world' menu.h main.c\n\
+PATTERNS can contain multiple patterns separated by newlines.\n\
+\n\
+Pattern selection and interpretation:\n"), getprogname ());
+      printf (_("\
+  -E, --extended-regexp     PATTERNS are extended regular expressions\n\
+  -F, --fixed-strings       PATTERNS are strings\n\
+  -G, --basic-regexp        PATTERNS are basic regular expressions\n\
+  -P, --perl-regexp         PATTERNS are Perl regular expressions\n"));
+  /* -X is deliberately undocumented.  */
+      printf (_("\
+  -e, --regexp=PATTERNS     use PATTERNS for matching\n\
+  -f, --file=FILE           take PATTERNS from FILE\n\
+  -i, --ignore-case         ignore case distinctions in patterns and data\n\
+      --no-ignore-case      do not ignore case distinctions (default)\n\
+  -w, --word-regexp         match only whole words\n\
+  -x, --line-regexp         match only whole lines\n\
+  -z, --null-data           a data line ends in 0 byte, not newline\n"));
+      printf (_("\
+\n\
+Miscellaneous:\n\
+  -s, --no-messages         suppress error messages\n\
+  -v, --invert-match        select non-matching lines\n\
+  -V, --version             display version information and exit\n\
+      --help                display this help text and exit\n"));
+      printf (_("\
+\n\
+Output control:\n\
+  -m, --max-count=NUM       stop after NUM selected lines\n\
+  -b, --byte-offset         print the byte offset with output lines\n\
+  -n, --line-number         print line number with output lines\n\
+      --line-buffered       flush output on every line\n\
+  -H, --with-filename       print file name with output lines\n\
+  -h, --no-filename         suppress the file name prefix on output\n\
+      --label=LABEL         use LABEL as the standard input file name prefix\n\
+"));
+      printf (_("\
+  -o, --only-matching       show only nonempty parts of lines that match\n\
+  -q, --quiet, --silent     suppress all normal output\n\
+      --binary-files=TYPE   assume that binary files are TYPE;\n\
+                            TYPE is 'binary', 'text', or 'without-match'\n\
+  -a, --text                equivalent to --binary-files=text\n\
+"));
+      printf (_("\
+  -I                        equivalent to --binary-files=without-match\n\
+  -d, --directories=ACTION  how to handle directories;\n\
+                            ACTION is 'read', 'recurse', or 'skip'\n\
+  -D, --devices=ACTION      how to handle devices, FIFOs and sockets;\n\
+                            ACTION is 'read' or 'skip'\n\
+  -r, --recursive           like --directories=recurse\n\
+  -R, --dereference-recursive  likewise, but follow all symlinks\n\
+"));
+      printf (_("\
+      --include=GLOB        search only files that match GLOB (a file pattern)"
+                "\n\
+      --exclude=GLOB        skip files that match GLOB\n\
+      --exclude-from=FILE   skip files that match any file pattern from FILE\n\
+      --exclude-dir=GLOB    skip directories that match GLOB\n\
+"));
+      printf (_("\
+  -L, --files-without-match  print only names of FILEs with no selected lines\n\
+  -l, --files-with-matches  print only names of FILEs with selected lines\n\
+  -c, --count               print only a count of selected lines per FILE\n\
+  -T, --initial-tab         make tabs line up (if needed)\n\
+  -Z, --null                print 0 byte after FILE name\n"));
+      printf (_("\
+\n\
+Context control:\n\
+  -B, --before-context=NUM  print NUM lines of leading context\n\
+  -A, --after-context=NUM   print NUM lines of trailing context\n\
+  -C, --context=NUM         print NUM lines of output context\n\
+"));
+      printf (_("\
+  -NUM                      same as --context=NUM\n\
+      --group-separator=SEP  print SEP on line between matches with context\n\
+      --no-group-separator  do not print separator for matches with context\n\
+      --color[=WHEN],\n\
+      --colour[=WHEN]       use markers to highlight the matching strings;\n\
+                            WHEN is 'always', 'never', or 'auto'\n\
+  -U, --binary              do not strip CR characters at EOL (MSDOS/Windows)\n\
+\n"));
+#ifdef KMK_GREP
+      printf (_("\
+kmk_grep extensions:\n\
+  --codepage=NUM            switches the locale to the given codepage, \n\
+                            affecting how input files are treated and outputted\n\
+                            windows only, ignored elsewhere\n\
+  --utf8                    shorthand for --codepage=UTF8\n\
+\n"));
+#endif
+      printf (_("\
+When FILE is '-', read standard input.  With no FILE, read '.' if\n\
+recursive, '-' otherwise.  With fewer than two FILEs, assume -h.\n\
+Exit status is 0 if any line is selected, 1 otherwise;\n\
+if any error occurs and -q is not given, the exit status is 2.\n"));
+      emit_bug_reporting_address ();
+    }
+  exit (status);
+}
+
+/* Pattern compilers and matchers.  */
+
+static struct
+{
+  char name[12];
+  int syntax; /* used if compile == GEAcompile */
+  compile_fp_t compile;
+  execute_fp_t execute;
+} const matchers[] = {
+  { "grep",     RE_SYNTAX_GREP,      (compile_fp_t)GEAcompile,  (execute_fp_t)EGexecute },
+  { "egrep",    RE_SYNTAX_EGREP,     (compile_fp_t)GEAcompile,  (execute_fp_t)EGexecute },
+  { "fgrep",    0,                   (compile_fp_t)Fcompile,    (execute_fp_t)Fexecute },
+  { "awk",      RE_SYNTAX_AWK,       (compile_fp_t)GEAcompile,  (execute_fp_t)EGexecute },
+  { "gawk",     RE_SYNTAX_GNU_AWK,   (compile_fp_t)GEAcompile,  (execute_fp_t)EGexecute },
+  { "posixawk", RE_SYNTAX_POSIX_AWK, (compile_fp_t)GEAcompile,  (execute_fp_t)EGexecute },
+#if HAVE_LIBPCRE
+  { "perl",     0,                   (compile_fp_t)Pcompile,    (execute_fp_t)Pexecute },
+#endif
+};
+/* Keep these in sync with the 'matchers' table.  */
+enum { E_MATCHER_INDEX = 1, F_MATCHER_INDEX = 2, G_MATCHER_INDEX = 0 };
+
+/* Return the index of the matcher corresponding to M if available.
+   MATCHER is the index of the previous matcher, or -1 if none.
+   Exit in case of conflicts or if M is not available.  */
+static int
+setmatcher (char const *m, int matcher)
+{
+  for (int i = 0; i < sizeof matchers / sizeof *matchers; i++)
+    if (STREQ (m, matchers[i].name))
+      {
+        if (0 <= matcher && matcher != i)
+          die (EXIT_TROUBLE, 0, _("conflicting matchers specified"));
+        return i;
+      }
+
+#if !HAVE_LIBPCRE
+  if (STREQ (m, "perl"))
+    die (EXIT_TROUBLE, 0,
+         _("Perl matching not supported in a --disable-perl-regexp build"));
+#endif
+  die (EXIT_TROUBLE, 0, _("invalid matcher %s"), m);
+}
+
+/* Get the next non-digit option from ARGC and ARGV.
+   Return -1 if there are no more options.
+   Process any digit options that were encountered on the way,
+   and store the resulting integer into *DEFAULT_CONTEXT.  */
+static int
+get_nondigit_option (int argc, char *const *argv, intmax_t *default_context)
+{
+  static int prev_digit_optind = -1;
+  int this_digit_optind;
+  bool was_digit;
+  char buf[INT_BUFSIZE_BOUND (intmax_t) + 4];
+  char *p = buf;
+  int opt;
+
+  was_digit = false;
+  this_digit_optind = optind;
+  while (true)
+    {
+      opt = getopt_long (argc, (char **) argv, short_options,
+                         long_options, NULL);
+      if (! c_isdigit (opt))
+        break;
+
+      if (prev_digit_optind != this_digit_optind || !was_digit)
+        {
+          /* Reset to start another context length argument.  */
+          p = buf;
+        }
+      else
+        {
+          /* Suppress trivial leading zeros, to avoid incorrect
+             diagnostic on strings like 00000000000.  */
+          p -= buf[0] == '0';
+        }
+
+      if (p == buf + sizeof buf - 4)
+        {
+          /* Too many digits.  Append "..." to make context_length_arg
+             complain about "X...", where X contains the digits seen
+             so far.  */
+          strcpy (p, "...");
+          p += 3;
+          break;
+        }
+      *p++ = opt;
+
+      was_digit = true;
+      prev_digit_optind = this_digit_optind;
+      this_digit_optind = optind;
+    }
+  if (p != buf)
+    {
+      *p = '\0';
+      context_length_arg (buf, default_context);
+    }
+
+  return opt;
+}
+
+/* Parse GREP_COLORS.  The default would look like:
+     GREP_COLORS='ms=01;31:mc=01;31:sl=:cx=:fn=35:ln=32:bn=32:se=36'
+   with boolean capabilities (ne and rv) unset (i.e., omitted).
+   No character escaping is needed or supported.  */
+static void
+parse_grep_colors (void)
+{
+  const char *p;
+  char *q;
+  char *name;
+  char *val;
+
+  p = getenv ("GREP_COLORS"); /* Plural! */
+  if (p == NULL || *p == '\0')
+    return;
+
+  /* Work off a writable copy.  */
+  q = xstrdup (p);
+
+  name = q;
+  val = NULL;
+  /* From now on, be well-formed or you're gone.  */
+  for (;;)
+    if (*q == ':' || *q == '\0')
+      {
+        char c = *q;
+        struct color_cap const *cap;
+
+        *q++ = '\0'; /* Terminate name or val.  */
+        /* Empty name without val (empty cap)
+         * won't match and will be ignored.  */
+        for (cap = color_dict; cap->name; cap++)
+          if (STREQ (cap->name, name))
+            break;
+        /* If name unknown, go on for forward compatibility.  */
+        if (cap->var && val)
+          *(cap->var) = val;
+        if (cap->fct)
+          cap->fct ();
+        if (c == '\0')
+          return;
+        name = q;
+        val = NULL;
+      }
+    else if (*q == '=')
+      {
+        if (q == name || val)
+          return;
+        *q++ = '\0'; /* Terminate name.  */
+        val = q; /* Can be the empty string.  */
+      }
+    else if (val == NULL)
+      q++; /* Accumulate name.  */
+    else if (*q == ';' || c_isdigit (*q))
+      q++; /* Accumulate val.  Protect the terminal from being sent crap.  */
+    else
+      return;
+}
+
+/* Return true if PAT (of length PATLEN) contains an encoding error.  */
+static bool
+contains_encoding_error (char const *pat, size_t patlen)
+{
+  mbstate_t mbs = { 0 };
+  size_t i, charlen;
+
+  for (i = 0; i < patlen; i += charlen)
+    {
+      charlen = mb_clen (pat + i, patlen - i, &mbs);
+      if ((size_t) -2 <= charlen)
+        return true;
+    }
+  return false;
+}
+
+/* When ignoring case and (-E or -F or -G), then for each single-byte
+   character I, ok_fold[I] is 1 if every case folded counterpart of I
+   is also single-byte, and is -1 otherwise.  */
+static signed char ok_fold[NCHAR];
+static void
+setup_ok_fold (void)
+{
+  for (int i = 0; i < NCHAR; i++)
+    {
+      wint_t wi = localeinfo.sbctowc[i];
+      if (wi == WEOF)
+        continue;
+
+      int ok = 1;
+      wchar_t folded[CASE_FOLDED_BUFSIZE];
+      for (int n = case_folded_counterparts (wi, folded); 0 <= --n; )
+        {
+          char buf[MB_LEN_MAX];
+          mbstate_t s = { 0 };
+          if (wcrtomb (buf, folded[n], &s) != 1)
+            {
+              ok = -1;
+              break;
+            }
+        }
+      ok_fold[i] = ok;
+    }
+}
+
+/* Return the number of bytes in the initial character of PAT, of size
+   PATLEN, if Fcompile can handle that character.  Return -1 if
+   Fcompile cannot handle it.  MBS is the multibyte conversion state.
+   PATLEN must be nonzero.  */
+
+static int
+fgrep_icase_charlen (char const *pat, size_t patlen, mbstate_t *mbs)
+{
+  unsigned char pat0 = pat[0];
+
+  /* If PAT starts with a single-byte character, Fcompile works if
+     every case folded counterpart is also single-byte.  */
+  if (localeinfo.sbctowc[pat0] != WEOF)
+    return ok_fold[pat0];
+
+  wchar_t wc;
+  size_t wn = mbrtowc (&wc, pat, patlen, mbs);
+
+  /* If PAT starts with an encoding error, Fcompile does not work.  */
+  if (MB_LEN_MAX < wn)
+    return -1;
+
+  /* PAT starts with a multibyte character.  Fcompile works if the
+     character has no case folded counterparts and toupper translates
+     none of its encoding's bytes.  */
+  wchar_t folded[CASE_FOLDED_BUFSIZE];
+  if (case_folded_counterparts (wc, folded))
+    return -1;
+  for (int i = wn; 0 < --i; )
+    {
+      unsigned char c = pat[i];
+      if (toupper (c) != c)
+        return -1;
+    }
+  return wn;
+}
+
+/* Return true if the -F patterns PAT, of size PATLEN, contain only
+   single-byte characters that case-fold only to single-byte
+   characters, or multibyte characters not subject to case folding,
+   and so can be processed by Fcompile.  */
+
+static bool
+fgrep_icase_available (char const *pat, size_t patlen)
+{
+  mbstate_t mbs = {0,};
+
+  for (size_t i = 0; i < patlen; )
+    {
+      int n = fgrep_icase_charlen (pat + i, patlen - i, &mbs);
+      if (n < 0)
+        return false;
+      i += n;
+    }
+
+  return true;
+}
+
+/* Change the pattern *KEYS_P, of size *LEN_P, from fgrep to grep style.  */
+
+void
+fgrep_to_grep_pattern (char **keys_p, size_t *len_p)
+{
+  size_t len = *len_p;
+  char *keys = *keys_p;
+  mbstate_t mb_state = { 0 };
+  char *new_keys = xnmalloc (len + 1, 2);
+  char *p = new_keys;
+  size_t n;
+
+  for (; len; keys += n, len -= n)
+    {
+      n = mb_clen (keys, len, &mb_state);
+      switch (n)
+        {
+        case (size_t) -2:
+          n = len;
+          FALLTHROUGH;
+        default:
+          p = mempcpy (p, keys, n);
+          break;
+
+        case (size_t) -1:
+          memset (&mb_state, 0, sizeof mb_state);
+          n = 1;
+          FALLTHROUGH;
+        case 1:
+          switch (*keys)
+            {
+            case '$': case '*': case '.': case '[': case '\\': case '^':
+              *p++ = '\\'; break;
+            }
+          *p++ = *keys;
+          break;
+        }
+    }
+
+  *p = '\n';
+  free (*keys_p);
+  *keys_p = new_keys;
+  *len_p = p - new_keys;
+}
+
+/* If it is easy, convert the MATCHER-style patterns KEYS (of size
+   *LEN_P) to -F style, update *LEN_P to a possibly-smaller value, and
+   return F_MATCHER_INDEX.  If not, leave KEYS and *LEN_P alone and
+   return MATCHER.  This function is conservative and sometimes misses
+   conversions, e.g., it does not convert the -E pattern "(a|a|[aa])"
+   to the -F pattern "a".  */
+
+static int
+try_fgrep_pattern (int matcher, char *keys, size_t *len_p)
+{
+  int result = matcher;
+  size_t len = *len_p;
+  char *new_keys = xmalloc (len + 1);
+  char *p = new_keys;
+  char const *q = keys;
+  mbstate_t mb_state = { 0 };
+
+  while (len != 0)
+    {
+      switch (*q)
+        {
+        case '$': case '*': case '.': case '[': case '^':
+          goto fail;
+
+        case '(': case '+': case '?': case '{': case '|':
+          /* There is no "case ')'" here, as "grep -E ')'" acts like
+             "grep -E '\)'".  */
+          if (matcher != G_MATCHER_INDEX)
+            goto fail;
+          break;
+
+        case '\\':
+          if (1 < len)
+            switch (q[1])
+              {
+              case '\n':
+              case 'B': case 'S': case 'W': case'\'': case '<':
+              case 'b': case 's': case 'w': case '`': case '>':
+              case '1': case '2': case '3': case '4':
+              case '5': case '6': case '7': case '8': case '9':
+                goto fail;
+
+              case '(': case '+': case '?': case '{': case '|':
+                /* Pass '\)' to GEAcompile so it can complain.  Otherwise,
+                   "grep '\)'" would act like "grep ')'" while "grep '.*\)'
+                   would be an error.  */
+              case ')':
+                if (matcher == G_MATCHER_INDEX)
+                  goto fail;
+                FALLTHROUGH;
+              default:
+                q++, len--;
+                break;
+              }
+          break;
+        }
+
+      {
+        size_t n;
+        if (match_icase)
+          {
+            int ni = fgrep_icase_charlen (q, len, &mb_state);
+            if (ni < 0)
+              goto fail;
+            n = ni;
+          }
+        else
+          {
+            n = mb_clen (q, len, &mb_state);
+            if (MB_LEN_MAX < n)
+              goto fail;
+          }
+
+        p = mempcpy (p, q, n);
+        q += n;
+        len -= n;
+      }
+    }
+
+  if (*len_p != p - new_keys)
+    {
+      *len_p = p - new_keys;
+      char *keys_end = mempcpy (keys, new_keys, p - new_keys);
+      *keys_end = '\n';
+    }
+  result = F_MATCHER_INDEX;
+
+ fail:
+  free (new_keys);
+  return result;
+}
+
+int
+main (int argc, char **argv)
+{
+  char *keys = NULL;
+  size_t keycc = 0, keyalloc = 0;
+  int matcher = -1;
+  int opt;
+  int prev_optind, last_recursive;
+  int fread_errno;
+  intmax_t default_context;
+  FILE *fp;
+  exit_failure = EXIT_TROUBLE;
+  initialize_main (&argc, &argv);
+
+  /* Which command-line options have been specified for filename output.
+     -1 for -h, 1 for -H, 0 for neither.  */
+  int filename_option = 0;
+
+  eolbyte = '\n';
+  filename_mask = ~0;
+
+  max_count = INTMAX_MAX;
+
+  /* The value -1 means to use DEFAULT_CONTEXT. */
+  out_after = out_before = -1;
+  /* Default before/after context: changed by -C/-NUM options */
+  default_context = -1;
+  /* Changed by -o option */
+  only_matching = false;
+
+  /* Internationalization. */
+#if defined HAVE_SETLOCALE
+# if defined(KMK_GREP) && defined(KBUILD_OS_WINDOWS)
+  if (getenv ("KMK_GREP_CODEPAGE"))
+    kmk_grep_set_codepage (getenv ("KMK_GREP_CODEPAGE"));
+  else
+# endif
+    setlocale (LC_ALL, "");
+#endif
+#if defined ENABLE_NLS
+  bindtextdomain (PACKAGE, LOCALEDIR);
+  textdomain (PACKAGE);
+#endif
+
+  init_localeinfo (&localeinfo);
+
+  atexit (clean_up_stdout);
+  c_stack_action (NULL);
+
+  last_recursive = 0;
+
+  pattern_table = hash_initialize (0, 0, hash_pattern, compare_patterns, 0);
+  if (!pattern_table)
+    xalloc_die ();
+
+  while (prev_optind = optind,
+         (opt = get_nondigit_option (argc, argv, &default_context)) != -1)
+    switch (opt)
+      {
+      case 'A':
+        context_length_arg (optarg, &out_after);
+        break;
+
+      case 'B':
+        context_length_arg (optarg, &out_before);
+        break;
+
+      case 'C':
+        /* Set output match context, but let any explicit leading or
+           trailing amount specified with -A or -B stand. */
+        context_length_arg (optarg, &default_context);
+        break;
+
+      case 'D':
+        if (STREQ (optarg, "read"))
+          devices = READ_DEVICES;
+        else if (STREQ (optarg, "skip"))
+          devices = SKIP_DEVICES;
+        else
+          die (EXIT_TROUBLE, 0, _("unknown devices method"));
+        break;
+
+      case 'E':
+        matcher = setmatcher ("egrep", matcher);
+        break;
+
+      case 'F':
+        matcher = setmatcher ("fgrep", matcher);
+        break;
+
+      case 'P':
+        matcher = setmatcher ("perl", matcher);
+        break;
+
+      case 'G':
+        matcher = setmatcher ("grep", matcher);
+        break;
+
+      case 'X': /* undocumented on purpose */
+        matcher = setmatcher (optarg, matcher);
+        break;
+
+      case 'H':
+        filename_option = 1;
+        break;
+
+      case 'I':
+        binary_files = WITHOUT_MATCH_BINARY_FILES;
+        break;
+
+      case 'T':
+        align_tabs = true;
+        break;
+
+      case 'U':
+        if (O_BINARY)
+          binary = true;
+        break;
+
+      case 'u':
+        /* Obsolete option; it had no effect; FIXME: remove in 2023  */
+        error (0, 0, _("warning: --unix-byte-offsets (-u) is obsolete"));
+        break;
+
+      case 'V':
+        show_version = true;
+        break;
+
+      case 'a':
+        binary_files = TEXT_BINARY_FILES;
+        break;
+
+      case 'b':
+        out_byte = true;
+        break;
+
+      case 'c':
+        count_matches = true;
+        break;
+
+      case 'd':
+        directories = XARGMATCH ("--directories", optarg,
+                                 directories_args, directories_types);
+        if (directories == RECURSE_DIRECTORIES)
+          last_recursive = prev_optind;
+        break;
+
+      case 'e':
+        {
+          ptrdiff_t cc = strlen (optarg);
+          if (keyalloc < keycc + cc + 1)
+            {
+              keyalloc = keycc + cc + 1;
+              pattern_array = keys = x2realloc (keys, &keyalloc);
+            }
+          char *keyend = mempcpy (keys + keycc, optarg, cc);
+          *keyend = '\n';
+          keycc = update_patterns (keys, keycc, keycc + cc + 1, "");
+        }
+        break;
+
+      case 'f':
+        {
+          if (STREQ (optarg, "-"))
+            {
+              if (binary)
+                xset_binary_mode (STDIN_FILENO, O_BINARY);
+              fp = stdin;
+            }
+          else
+            {
+              fp = fopen (optarg, binary ? "rb" : "r");
+              if (!fp)
+                die (EXIT_TROUBLE, errno, "%s", optarg);
+            }
+          ptrdiff_t newkeycc = keycc, cc;
+          for (;; newkeycc += cc)
+            {
+              if (keyalloc <= newkeycc + 1)
+                pattern_array = keys = x2realloc (keys, &keyalloc);
+              cc = fread (keys + newkeycc, 1, keyalloc - (newkeycc + 1), fp);
+              if (cc == 0)
+                break;
+            }
+          fread_errno = errno;
+          if (ferror (fp))
+            die (EXIT_TROUBLE, fread_errno, "%s", optarg);
+          if (fp != stdin)
+            fclose (fp);
+          /* Append final newline if file ended in non-newline. */
+          if (newkeycc != keycc && keys[newkeycc - 1] != '\n')
+            keys[newkeycc++] = '\n';
+          keycc = update_patterns (keys, keycc, newkeycc, optarg);
+        }
+        break;
+
+      case 'h':
+        filename_option = -1;
+        break;
+
+      case 'i':
+      case 'y':			/* For old-timers . . . */
+        match_icase = true;
+        break;
+
+      case NO_IGNORE_CASE_OPTION:
+        match_icase = false;
+        break;
+
+      case 'L':
+        /* Like -l, except list files that don't contain matches.
+           Inspired by the same option in Hume's gre. */
+        list_files = LISTFILES_NONMATCHING;
+        break;
+
+      case 'l':
+        list_files = LISTFILES_MATCHING;
+        break;
+
+      case 'm':
+        switch (xstrtoimax (optarg, 0, 10, &max_count, ""))
+          {
+          case LONGINT_OK:
+          case LONGINT_OVERFLOW:
+            break;
+
+          default:
+            die (EXIT_TROUBLE, 0, _("invalid max count"));
+          }
+        break;
+
+      case 'n':
+        out_line = true;
+        break;
+
+      case 'o':
+        only_matching = true;
+        break;
+
+      case 'q':
+        exit_on_match = true;
+        exit_failure = 0;
+        break;
+
+      case 'R':
+        fts_options = basic_fts_options | FTS_LOGICAL;
+        FALLTHROUGH;
+      case 'r':
+        directories = RECURSE_DIRECTORIES;
+        last_recursive = prev_optind;
+        break;
+
+      case 's':
+        suppress_errors = true;
+        break;
+
+      case 'v':
+        out_invert = true;
+        break;
+
+      case 'w':
+        wordinit ();
+        match_words = true;
+        break;
+
+      case 'x':
+        match_lines = true;
+        break;
+
+      case 'Z':
+        filename_mask = 0;
+        break;
+
+      case 'z':
+        eolbyte = '\0';
+        break;
+
+      case BINARY_FILES_OPTION:
+        if (STREQ (optarg, "binary"))
+          binary_files = BINARY_BINARY_FILES;
+        else if (STREQ (optarg, "text"))
+          binary_files = TEXT_BINARY_FILES;
+        else if (STREQ (optarg, "without-match"))
+          binary_files = WITHOUT_MATCH_BINARY_FILES;
+        else
+          die (EXIT_TROUBLE, 0, _("unknown binary-files type"));
+        break;
+
+      case COLOR_OPTION:
+        if (optarg)
+          {
+            if (!c_strcasecmp (optarg, "always")
+                || !c_strcasecmp (optarg, "yes")
+                || !c_strcasecmp (optarg, "force"))
+              color_option = 1;
+            else if (!c_strcasecmp (optarg, "never")
+                     || !c_strcasecmp (optarg, "no")
+                     || !c_strcasecmp (optarg, "none"))
+              color_option = 0;
+            else if (!c_strcasecmp (optarg, "auto")
+                     || !c_strcasecmp (optarg, "tty")
+                     || !c_strcasecmp (optarg, "if-tty"))
+              color_option = 2;
+            else
+              show_help = 1;
+          }
+        else
+          color_option = 2;
+        break;
+
+      case EXCLUDE_OPTION:
+      case INCLUDE_OPTION:
+        for (int cmd = 0; cmd < 2; cmd++)
+          {
+            if (!excluded_patterns[cmd])
+              excluded_patterns[cmd] = new_exclude ();
+            add_exclude (excluded_patterns[cmd], optarg,
+                         ((opt == INCLUDE_OPTION ? EXCLUDE_INCLUDE : 0)
+                          | exclude_options (cmd)));
+          }
+        break;
+      case EXCLUDE_FROM_OPTION:
+        for (int cmd = 0; cmd < 2; cmd++)
+          {
+            if (!excluded_patterns[cmd])
+              excluded_patterns[cmd] = new_exclude ();
+            if (add_exclude_file (add_exclude, excluded_patterns[cmd],
+                                  optarg, exclude_options (cmd), '\n')
+                != 0)
+              die (EXIT_TROUBLE, errno, "%s", optarg);
+          }
+        break;
+
+      case EXCLUDE_DIRECTORY_OPTION:
+        strip_trailing_slashes (optarg);
+        for (int cmd = 0; cmd < 2; cmd++)
+          {
+            if (!excluded_directory_patterns[cmd])
+              excluded_directory_patterns[cmd] = new_exclude ();
+            add_exclude (excluded_directory_patterns[cmd], optarg,
+                         exclude_options (cmd));
+          }
+        break;
+
+      case GROUP_SEPARATOR_OPTION:
+        group_separator = optarg;
+        break;
+
+      case LINE_BUFFERED_OPTION:
+        line_buffered = true;
+        break;
+
+      case LABEL_OPTION:
+        label = optarg;
+        break;
+
+#ifdef KMK_GREP
+      /* The --utf8 and --codepage <cp> options are mainly for windows where
+         UCRT doesn't check any of the standard locale selecting environment
+         variables and we have to give it directly to setlocale if we want
+         any control beyond the Windows defaults.
+
+         The UCRT setlocale has a nice feature of allowing us to set just
+         the codepage, omitting the rest of the locale spec. */
+      case UTF8_OPTION:
+        kmk_grep_set_codepage (".UTF-8");
+        break;
+      case CODEPAGE_OPTION:
+        kmk_grep_set_codepage (optarg);
+        break;
+#endif
+
+      case 0:
+        /* long options */
+        break;
+
+      default:
+        usage (EXIT_TROUBLE);
+        break;
+
+      }
+
+  if (show_version)
+    {
+      version_etc (stdout, getprogname (), PACKAGE_NAME, VERSION,
+                   (char *) NULL);
+      puts (_("Written by Mike Haertel and others; see\n"
+              "<https://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>."));
+      return EXIT_SUCCESS;
+    }
+
+  if (show_help)
+    usage (EXIT_SUCCESS);
+
+  if (keys)
+    {
+      if (keycc == 0)
+        {
+          /* No keys were specified (e.g. -f /dev/null).  Match nothing.  */
+          out_invert ^= true;
+          match_lines = match_words = false;
+          keys[keycc++] = '\n';
+        }
+    }
+  else if (optind < argc)
+    {
+      /* Make a copy so that it can be reallocated or freed later.  */
+      pattern_array = keys = xstrdup (argv[optind++]);
+      ptrdiff_t patlen = strlen (keys);
+      keys[patlen] = '\n';
+      keycc = update_patterns (keys, 0, patlen + 1, "");
+    }
+  else
+    usage (EXIT_TROUBLE);
+
+  /* Strip trailing newline from keys.  */
+  keycc--;
+
+  hash_free (pattern_table);
+
+  bool possibly_tty = false;
+  struct stat tmp_stat;
+  if (! exit_on_match && fstat (STDOUT_FILENO, &tmp_stat) == 0)
+    {
+      if (S_ISREG (tmp_stat.st_mode))
+        out_stat = tmp_stat;
+      else if (S_ISCHR (tmp_stat.st_mode))
+        {
+          struct stat null_stat;
+          if (stat ("/dev/null", &null_stat) == 0
+              && SAME_INODE (tmp_stat, null_stat))
+            dev_null_output = true;
+          else
+            possibly_tty = true;
+        }
+    }
+
+  /* POSIX says -c, -l and -q are mutually exclusive.  In this
+     implementation, -q overrides -l and -L, which in turn override -c.  */
+  if (exit_on_match | dev_null_output)
+    list_files = LISTFILES_NONE;
+  if ((exit_on_match | dev_null_output) || list_files != LISTFILES_NONE)
+    {
+      count_matches = false;
+      done_on_match = true;
+    }
+  out_quiet = count_matches | done_on_match;
+
+  if (out_after < 0)
+    out_after = default_context;
+  if (out_before < 0)
+    out_before = default_context;
+
+  /* If it is easy to see that matching cannot succeed (e.g., 'grep -f
+     /dev/null'), fail without reading the input.  */
+  if ((max_count == 0
+       || (keycc == 0 && out_invert && !match_lines && !match_words))
+      && list_files != LISTFILES_NONMATCHING)
+    return EXIT_FAILURE;
+
+  if (color_option == 2)
+    color_option = possibly_tty && should_colorize () && isatty (STDOUT_FILENO);
+  init_colorize ();
+
+  if (color_option)
+    {
+      /* Legacy.  */
+      char *userval = getenv ("GREP_COLOR");
+      if (userval != NULL && *userval != '\0')
+        selected_match_color = context_match_color = userval;
+
+      /* New GREP_COLORS has priority.  */
+      parse_grep_colors ();
+    }
+
+  initialize_unibyte_mask ();
+
+  if (matcher < 0)
+    matcher = G_MATCHER_INDEX;
+
+  if (matcher == F_MATCHER_INDEX
+      || matcher == E_MATCHER_INDEX || matcher == G_MATCHER_INDEX)
+    {
+      if (match_icase)
+        setup_ok_fold ();
+
+      /* In a single-byte locale, switch from -F to -G if it is a single
+         pattern that matches words, where -G is typically faster.  In a
+         multibyte locale, switch if the patterns have an encoding error
+         (where -F does not work) or if -i and the patterns will not work
+         for -iF.  */
+      if (matcher == F_MATCHER_INDEX)
+        {
+          if (! localeinfo.multibyte
+              ? n_patterns == 1 && match_words
+              : (contains_encoding_error (keys, keycc)
+                 || (match_icase && !fgrep_icase_available (keys, keycc))))
+            {
+              fgrep_to_grep_pattern (&pattern_array, &keycc);
+              keys = pattern_array;
+              matcher = G_MATCHER_INDEX;
+            }
+        }
+      /* With two or more patterns, if -F works then switch from either -E
+         or -G, as -F is probably faster then.  */
+      else if (1 < n_patterns)
+        matcher = try_fgrep_pattern (matcher, keys, &keycc);
+    }
+
+  execute = matchers[matcher].execute;
+  compiled_pattern =
+    matchers[matcher].compile (keys, keycc, matchers[matcher].syntax,
+                               only_matching | color_option);
+  /* We need one byte prior and one after.  */
+  char eolbytes[3] = { 0, eolbyte, 0 };
+  size_t match_size;
+  skip_empty_lines = ((execute (compiled_pattern, eolbytes + 1, 1,
+                                &match_size, NULL) == 0)
+                      == out_invert);
+
+  int num_operands = argc - optind;
+  out_file = (filename_option == 0 && num_operands <= 1
+              ? - (directories == RECURSE_DIRECTORIES)
+              : 0 <= filename_option);
+
+  if (binary)
+    xset_binary_mode (STDOUT_FILENO, O_BINARY);
+
+  /* Prefer sysconf for page size, as getpagesize typically returns int.  */
+#ifdef _SC_PAGESIZE
+  long psize = sysconf (_SC_PAGESIZE);
+#else
+  long psize = getpagesize ();
+#endif
+  if (! (0 < psize && psize <= (SIZE_MAX - sizeof (uword)) / 2))
+    abort ();
+  pagesize = psize;
+  bufalloc = ALIGN_TO (INITIAL_BUFSIZE, pagesize) + pagesize + sizeof (uword);
+  buffer = xmalloc (bufalloc);
+
+  if (fts_options & FTS_LOGICAL && devices == READ_COMMAND_LINE_DEVICES)
+    devices = READ_DEVICES;
+
+  char *const *files;
+  if (0 < num_operands)
+    {
+      files = argv + optind;
+    }
+  else if (directories == RECURSE_DIRECTORIES && 0 < last_recursive)
+    {
+      static char *const cwd_only[] = { (char *) ".", NULL };
+      files = cwd_only;
+      omit_dot_slash = true;
+    }
+  else
+    {
+      static char *const stdin_only[] = { (char *) "-", NULL };
+      files = stdin_only;
+    }
+
+  bool status = true;
+  do
+    status &= grep_command_line_arg (*files++);
+  while (*files != NULL);
+
+  /* We register via atexit to test stdout.  */
+  return errseen ? EXIT_TROUBLE : status;
+}
diff --git a/src/grep/src/grep.h b/src/grep/src/grep.h
new file mode 100644
index 0000000..a3cd73e
--- /dev/null
+++ b/src/grep/src/grep.h
@@ -0,0 +1,34 @@
+/* grep.h - interface to grep driver for searching subroutines.
+   Copyright (C) 1992, 1998, 2001, 2007, 2009-2021 Free Software Foundation,
+   Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+#ifndef GREP_GREP_H
+#define GREP_GREP_H 1
+
+#include <stdbool.h>
+
+/* The following flags are exported from grep for the matchers
+   to look at. */
+extern bool match_icase;	/* -i */
+extern bool match_words;	/* -w */
+extern bool match_lines;	/* -x */
+extern char eolbyte;		/* -z */
+
+extern char const *pattern_file_name (size_t, size_t *);
+
+#endif
diff --git a/src/grep/src/kwsearch.c b/src/grep/src/kwsearch.c
new file mode 100644
index 0000000..ea18ce1
--- /dev/null
+++ b/src/grep/src/kwsearch.c
@@ -0,0 +1,240 @@
+/* kwsearch.c - searching subroutines using kwset for grep.
+   Copyright 1992, 1998, 2000, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+/* Written August 1992 by Mike Haertel. */
+
+#include <config.h>
+#include "search.h"
+
+/* A compiled -F pattern list.  */
+
+struct kwsearch
+{
+  /* The kwset for this pattern list.  */
+  kwset_t kwset;
+
+  /* The number of user-specified patterns.  This is less than
+     'kwswords (kwset)' when some extra one-character words have been
+     appended, one for each troublesome character that will require a
+     DFA search.  */
+  ptrdiff_t words;
+
+  /* The user's pattern and its size in bytes.  */
+  char *pattern;
+  size_t size;
+
+  /* The user's pattern compiled as a regular expression,
+     or null if it has not been compiled.  */
+  void *re;
+};
+
+/* Compile the -F style PATTERN, containing SIZE bytes that are
+   followed by '\n'.  Return a description of the compiled pattern.  */
+
+void *
+Fcompile (char *pattern, size_t size, reg_syntax_t ignored, bool exact)
+{
+  kwset_t kwset;
+  char *buf = NULL;
+  size_t bufalloc = 0;
+
+  kwset = kwsinit (true);
+
+  char const *p = pattern;
+  do
+    {
+      char const *sep = rawmemchr (p, '\n');
+      ptrdiff_t len = sep - p;
+
+      if (match_lines)
+        {
+          if (eolbyte == '\n' && pattern < p)
+            p--;
+          else
+            {
+              if (bufalloc < len + 2)
+                {
+                  free (buf);
+                  bufalloc = len + 2;
+                  buf = x2realloc (NULL, &bufalloc);
+                  buf[0] = eolbyte;
+                }
+              memcpy (buf + 1, p, len);
+              buf[len + 1] = eolbyte;
+              p = buf;
+            }
+          len += 2;
+        }
+      kwsincr (kwset, p, len);
+
+      p = sep + 1;
+    }
+  while (p <= pattern + size);
+
+  free (buf);
+
+  ptrdiff_t words = kwswords (kwset);
+  kwsprep (kwset);
+
+  struct kwsearch *kwsearch = xmalloc (sizeof *kwsearch);
+  kwsearch->kwset = kwset;
+  kwsearch->words = words;
+  kwsearch->pattern = pattern;
+  kwsearch->size = size;
+  kwsearch->re = NULL;
+  return kwsearch;
+}
+
+/* Use the compiled pattern VCP to search the buffer BUF of size SIZE.
+   If found, return the offset of the first match and store its
+   size into *MATCH_SIZE.  If not found, return SIZE_MAX.
+   If START_PTR is nonnull, start searching there.  */
+size_t
+Fexecute (void *vcp, char const *buf, size_t size, size_t *match_size,
+          char const *start_ptr)
+{
+  char const *beg, *end, *mb_start;
+  ptrdiff_t len;
+  char eol = eolbyte;
+  struct kwsearch *kwsearch = vcp;
+  kwset_t kwset = kwsearch->kwset;
+  bool mb_check = localeinfo.multibyte & !localeinfo.using_utf8 & !match_lines;
+  bool longest = (mb_check | !!start_ptr | match_words) & !match_lines;
+
+  for (mb_start = beg = start_ptr ? start_ptr : buf; beg <= buf + size; beg++)
+    {
+      struct kwsmatch kwsmatch;
+      ptrdiff_t offset = kwsexec (kwset, beg - match_lines,
+                                  buf + size - beg + match_lines, &kwsmatch,
+                                  longest);
+      if (offset < 0)
+        break;
+      len = kwsmatch.size - 2 * match_lines;
+
+      size_t mbclen = 0;
+      if (mb_check
+          && mb_goback (&mb_start, &mbclen, beg + offset, buf + size) != 0)
+        {
+          /* We have matched a single byte that is not at the beginning of a
+             multibyte character.  mb_goback has advanced MB_START past that
+             multibyte character.  Now, we want to position BEG so that the
+             next kwsexec search starts there.  Thus, to compensate for the
+             for-loop's BEG++, above, subtract one here.  This code is
+             unusually hard to reach, and exceptionally, let's show how to
+             trigger it here:
+
+               printf '\203AA\n'|LC_ALL=ja_JP.SHIFT_JIS src/grep -F A
+
+             That assumes the named locale is installed.
+             Note that your system's shift-JIS locale may have a different
+             name, possibly including "sjis".  */
+          beg = mb_start - 1;
+          continue;
+        }
+      beg += offset;
+      if (!!start_ptr & !match_words)
+        goto success_in_beg_and_len;
+      if (match_lines)
+        {
+          len += start_ptr == NULL;
+          goto success_in_beg_and_len;
+        }
+      if (! match_words)
+        goto success;
+
+      /* We need a preceding mb_start pointer.  Use the beginning of line
+         if there is a preceding newline.  */
+      if (mbclen == 0)
+        {
+          char const *nl = memrchr (mb_start, eol, beg - mb_start);
+          if (nl)
+            mb_start = nl + 1;
+        }
+
+      /* Succeed if neither the preceding nor the following character is a
+         word constituent.  If the preceding is not, yet the following
+         character IS a word constituent, keep trying with shorter matches.  */
+      if (mbclen > 0
+          ? ! wordchar_next (beg - mbclen, buf + size)
+          : ! wordchar_prev (mb_start, beg, buf + size))
+        for (;;)
+          {
+            if (! wordchar_next (beg + len, buf + size))
+              {
+                if (start_ptr)
+                  goto success_in_beg_and_len;
+                else
+                  goto success;
+              }
+            if (!start_ptr && !localeinfo.multibyte)
+              {
+                if (! kwsearch->re)
+                  {
+                    fgrep_to_grep_pattern (&kwsearch->pattern, &kwsearch->size);
+                    kwsearch->re = GEAcompile (kwsearch->pattern,
+                                               kwsearch->size,
+                                               RE_SYNTAX_GREP, !!start_ptr);
+                  }
+                if (beg + len < buf + size)
+                  {
+                    end = rawmemchr (beg + len, eol);
+                    end++;
+                  }
+                else
+                  end = buf + size;
+
+                if (EGexecute (kwsearch->re, beg, end - beg, match_size, NULL)
+                    != (size_t) -1)
+                  goto success_match_words;
+                beg = end - 1;
+                break;
+              }
+            if (!len)
+              break;
+
+            struct kwsmatch shorter_match;
+            if (kwsexec (kwset, beg, --len, &shorter_match, true) != 0)
+              break;
+            len = shorter_match.size;
+          }
+
+      /* No word match was found at BEG.  Skip past word constituents,
+         since they cannot precede the next match and not skipping
+         them could make things much slower.  */
+      beg += wordchars_size (beg, buf + size);
+      mb_start = beg;
+    }
+
+  return -1;
+
+ success:
+  if (beg + len < buf + size)
+    {
+      end = rawmemchr (beg + len, eol);
+      end++;
+    }
+  else
+    end = buf + size;
+ success_match_words:
+  beg = memrchr (buf, eol, beg - buf);
+  beg = beg ? beg + 1 : buf;
+  len = end - beg;
+ success_in_beg_and_len:;
+  *match_size = len;
+  return beg - buf;
+}
diff --git a/src/grep/src/kwset.c b/src/grep/src/kwset.c
new file mode 100644
index 0000000..792cc01
--- /dev/null
+++ b/src/grep/src/kwset.c
@@ -0,0 +1,929 @@
+/* kwset.c - search for any of a set of keywords.
+   Copyright (C) 1989, 1998, 2000, 2005, 2007, 2009-2021 Free Software
+   Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+/* Written August 1989 by Mike Haertel.  */
+
+/* For the Aho-Corasick algorithm, see:
+   Aho AV, Corasick MJ. Efficient string matching: an aid to
+   bibliographic search. CACM 18, 6 (1975), 333-40
+   <https://dx.doi.org/10.1145/360825.360855>, which describes the
+   failure function used below.
+
+   For the Boyer-Moore algorithm, see: Boyer RS, Moore JS.
+   A fast string searching algorithm. CACM 20, 10 (1977), 762-72
+   <https://dx.doi.org/10.1145/359842.359859>.
+
+   For a survey of more-recent string matching algorithms that might
+   help improve performance, see: Faro S, Lecroq T. The exact online
+   string matching problem: a review of the most recent results.
+   ACM Computing Surveys 45, 2 (2013), 13
+   <https://dx.doi.org/10.1145/2431211.2431212>.  */
+
+#include <config.h>
+
+#include "kwset.h"
+
+#include <stdint.h>
+#include <sys/types.h>
+#include "system.h"
+#include "intprops.h"
+#include "memchr2.h"
+#include "obstack.h"
+#include "xalloc.h"
+#include "verify.h"
+
+#define obstack_chunk_alloc xmalloc
+#define obstack_chunk_free free
+
+static unsigned char
+U (char ch)
+{
+  return to_uchar (ch);
+}
+
+/* Balanced tree of edges and labels leaving a given trie node.  */
+struct tree
+{
+  struct tree *llink;		/* Left link; MUST be first field.  */
+  struct tree *rlink;		/* Right link (to larger labels).  */
+  struct trie *trie;		/* Trie node pointed to by this edge.  */
+  unsigned char label;		/* Label on this edge.  */
+  char balance;			/* Difference in depths of subtrees.  */
+};
+
+/* Node of a trie representing a set of keywords.  */
+struct trie
+{
+  /* If an accepting node, this is either 2*W + 1 where W is the word
+     index, or is SIZE_MAX if Aho-Corasick is in use and FAIL
+     specifies where to look for more info.  If not an accepting node,
+     this is zero.  */
+  size_t accepting;
+
+  struct tree *links;		/* Tree of edges leaving this node.  */
+  struct trie *parent;		/* Parent of this node.  */
+  struct trie *next;		/* List of all trie nodes in level order.  */
+  struct trie *fail;		/* Aho-Corasick failure function.  */
+  ptrdiff_t depth;		/* Depth of this node from the root.  */
+  ptrdiff_t shift;		/* Shift function for search failures.  */
+  ptrdiff_t maxshift;		/* Max shift of self and descendants.  */
+};
+
+/* Structure returned opaquely to the caller, containing everything.  */
+struct kwset
+{
+  struct obstack obstack;	/* Obstack for node allocation.  */
+  ptrdiff_t words;		/* Number of words in the trie.  */
+  struct trie *trie;		/* The trie itself.  */
+  ptrdiff_t mind;		/* Minimum depth of an accepting node.  */
+  ptrdiff_t maxd;		/* Maximum depth of any node.  */
+  unsigned char delta[NCHAR];	/* Delta table for rapid search.  */
+  struct trie *next[NCHAR];	/* Table of children of the root.  */
+  char *target;			/* Target string if there's only one.  */
+  ptrdiff_t *shift;		/* Used in Boyer-Moore search for one
+                                   string.  */
+  char const *trans;		/* Character translation table.  */
+
+  /* This helps to match a terminal byte, which is the first byte
+     for Aho-Corasick, and the last byte for Boyer-More.  If all the
+     patterns have the same terminal byte (after translation via TRANS
+     if TRANS is nonnull), then this is that byte as an unsigned char.
+     Otherwise this is -1 if there is disagreement among the strings
+     about terminal bytes, and -2 if there are no terminal bytes and
+     no disagreement because all the patterns are empty.  */
+  int gc1;
+
+  /* This helps to match a terminal byte.  If 0 <= GC1HELP, B is
+     terminal when B == GC1 || B == GC1HELP (note that GC1 == GCHELP
+     is common here).  This is typically faster than evaluating
+     to_uchar (TRANS[B]) == GC1.  */
+  int gc1help;
+
+  /* If the string has two or more bytes, this is the penultimate byte,
+     after translation via TRANS if TRANS is nonnull.  This variable
+     is used only by Boyer-Moore.  */
+  char gc2;
+
+  /* kwsexec implementation.  */
+  ptrdiff_t (*kwsexec) (kwset_t, char const *, ptrdiff_t,
+                        struct kwsmatch *, bool);
+};
+
+/* Use TRANS to transliterate C.  A null TRANS does no transliteration.  */
+static inline char
+tr (char const *trans, char c)
+{
+  return trans ? trans[U(c)] : c;
+}
+
+static ptrdiff_t acexec (kwset_t, char const *, ptrdiff_t,
+                         struct kwsmatch *, bool);
+static ptrdiff_t bmexec (kwset_t, char const *, ptrdiff_t,
+                         struct kwsmatch *, bool);
+
+/* Return a newly allocated keyword set.  A nonnull TRANS specifies a
+   table of character translations to be applied to all pattern and
+   search text.  */
+kwset_t
+kwsalloc (char const *trans)
+{
+  struct kwset *kwset = xmalloc (sizeof *kwset);
+
+  obstack_init (&kwset->obstack);
+  kwset->words = 0;
+  kwset->trie = obstack_alloc (&kwset->obstack, sizeof *kwset->trie);
+  kwset->trie->accepting = 0;
+  kwset->trie->links = NULL;
+  kwset->trie->parent = NULL;
+  kwset->trie->next = NULL;
+  kwset->trie->fail = NULL;
+  kwset->trie->depth = 0;
+  kwset->trie->shift = 0;
+  kwset->mind = PTRDIFF_MAX;
+  kwset->maxd = -1;
+  kwset->target = NULL;
+  kwset->trans = trans;
+  kwset->kwsexec = acexec;
+
+  return kwset;
+}
+
+/* This upper bound is valid for CHAR_BIT >= 4 and
+   exact for CHAR_BIT in { 4..11, 13, 15, 17, 19 }.  */
+enum { DEPTH_SIZE = CHAR_BIT + CHAR_BIT / 2 };
+
+/* Add the given string to the contents of the keyword set.  */
+void
+kwsincr (kwset_t kwset, char const *text, ptrdiff_t len)
+{
+  assume (0 <= len);
+  struct trie *trie = kwset->trie;
+  char const *trans = kwset->trans;
+  bool reverse = kwset->kwsexec == bmexec;
+
+  if (reverse)
+    text += len;
+
+  /* Descend the trie (built of keywords) character-by-character,
+     installing new nodes when necessary.  */
+  while (len--)
+    {
+      unsigned char uc = reverse ? *--text : *text++;
+      unsigned char label = trans ? trans[uc] : uc;
+
+      /* Descend the tree of outgoing links for this trie node,
+         looking for the current character and keeping track
+         of the path followed.  */
+      struct tree *cur = trie->links;
+      struct tree *links[DEPTH_SIZE];
+      enum { L, R } dirs[DEPTH_SIZE];
+      links[0] = (struct tree *) &trie->links;
+      dirs[0] = L;
+      ptrdiff_t depth = 1;
+
+      while (cur && label != cur->label)
+        {
+          links[depth] = cur;
+          if (label < cur->label)
+            dirs[depth++] = L, cur = cur->llink;
+          else
+            dirs[depth++] = R, cur = cur->rlink;
+        }
+
+      /* The current character doesn't have an outgoing link at
+         this trie node, so build a new trie node and install
+         a link in the current trie node's tree.  */
+      if (!cur)
+        {
+          cur = obstack_alloc (&kwset->obstack, sizeof *cur);
+          cur->llink = NULL;
+          cur->rlink = NULL;
+          cur->trie = obstack_alloc (&kwset->obstack, sizeof *cur->trie);
+          cur->trie->accepting = 0;
+          cur->trie->links = NULL;
+          cur->trie->parent = trie;
+          cur->trie->next = NULL;
+          cur->trie->fail = NULL;
+          cur->trie->depth = trie->depth + 1;
+          cur->trie->shift = 0;
+          cur->label = label;
+          cur->balance = 0;
+
+          /* Install the new tree node in its parent.  */
+          if (dirs[--depth] == L)
+            links[depth]->llink = cur;
+          else
+            links[depth]->rlink = cur;
+
+          /* Back up the tree fixing the balance flags.  */
+          while (depth && !links[depth]->balance)
+            {
+              if (dirs[depth] == L)
+                --links[depth]->balance;
+              else
+                ++links[depth]->balance;
+              --depth;
+            }
+
+          /* Rebalance the tree by pointer rotations if necessary.  */
+          if (depth && ((dirs[depth] == L && --links[depth]->balance)
+                        || (dirs[depth] == R && ++links[depth]->balance)))
+            {
+              struct tree *t, *r, *l, *rl, *lr;
+
+              switch (links[depth]->balance)
+                {
+                case (char) -2:
+                  switch (dirs[depth + 1])
+                    {
+                    case L:
+                      r = links[depth], t = r->llink, rl = t->rlink;
+                      t->rlink = r, r->llink = rl;
+                      t->balance = r->balance = 0;
+                      break;
+                    case R:
+                      r = links[depth], l = r->llink, t = l->rlink;
+                      rl = t->rlink, lr = t->llink;
+                      t->llink = l, l->rlink = lr, t->rlink = r, r->llink = rl;
+                      l->balance = t->balance != 1 ? 0 : -1;
+                      r->balance = t->balance != (char) -1 ? 0 : 1;
+                      t->balance = 0;
+                      break;
+                    default:
+                      abort ();
+                    }
+                  break;
+                case 2:
+                  switch (dirs[depth + 1])
+                    {
+                    case R:
+                      l = links[depth], t = l->rlink, lr = t->llink;
+                      t->llink = l, l->rlink = lr;
+                      t->balance = l->balance = 0;
+                      break;
+                    case L:
+                      l = links[depth], r = l->rlink, t = r->llink;
+                      lr = t->llink, rl = t->rlink;
+                      t->llink = l, l->rlink = lr, t->rlink = r, r->llink = rl;
+                      l->balance = t->balance != 1 ? 0 : -1;
+                      r->balance = t->balance != (char) -1 ? 0 : 1;
+                      t->balance = 0;
+                      break;
+                    default:
+                      abort ();
+                    }
+                  break;
+                default:
+                  abort ();
+                }
+
+              if (dirs[depth - 1] == L)
+                links[depth - 1]->llink = t;
+              else
+                links[depth - 1]->rlink = t;
+            }
+        }
+
+      trie = cur->trie;
+    }
+
+  /* Mark the node finally reached as accepting, encoding the
+     index number of this word in the keyword set so far.  */
+  if (!trie->accepting)
+    {
+      size_t words = kwset->words;
+      trie->accepting = 2 * words + 1;
+    }
+  ++kwset->words;
+
+  /* Keep track of the longest and shortest string of the keyword set.  */
+  if (trie->depth < kwset->mind)
+    kwset->mind = trie->depth;
+  if (trie->depth > kwset->maxd)
+    kwset->maxd = trie->depth;
+}
+
+ptrdiff_t
+kwswords (kwset_t kwset)
+{
+  return kwset->words;
+}
+
+/* Enqueue the trie nodes referenced from the given tree in the
+   given queue.  */
+static void
+enqueue (struct tree *tree, struct trie **last)
+{
+  if (!tree)
+    return;
+  enqueue (tree->llink, last);
+  enqueue (tree->rlink, last);
+  (*last) = (*last)->next = tree->trie;
+}
+
+/* Compute the Aho-Corasick failure function for the trie nodes referenced
+   from the given tree, given the failure function for their parent as
+   well as a last resort failure node.  */
+static void
+treefails (struct tree const *tree, struct trie const *fail,
+           struct trie *recourse, bool reverse)
+{
+  struct tree *cur;
+
+  if (!tree)
+    return;
+
+  treefails (tree->llink, fail, recourse, reverse);
+  treefails (tree->rlink, fail, recourse, reverse);
+
+  /* Find, in the chain of fails going back to the root, the first
+     node that has a descendant on the current label.  */
+  while (fail)
+    {
+      cur = fail->links;
+      while (cur && tree->label != cur->label)
+        if (tree->label < cur->label)
+          cur = cur->llink;
+        else
+          cur = cur->rlink;
+      if (cur)
+        {
+          tree->trie->fail = cur->trie;
+          if (!reverse && cur->trie->accepting && !tree->trie->accepting)
+            tree->trie->accepting = SIZE_MAX;
+          return;
+        }
+      fail = fail->fail;
+    }
+
+  tree->trie->fail = recourse;
+}
+
+/* Set delta entries for the links of the given tree such that
+   the preexisting delta value is larger than the current depth.  */
+static void
+treedelta (struct tree const *tree, ptrdiff_t depth, unsigned char delta[])
+{
+  if (!tree)
+    return;
+  treedelta (tree->llink, depth, delta);
+  treedelta (tree->rlink, depth, delta);
+  if (depth < delta[tree->label])
+    delta[tree->label] = depth;
+}
+
+/* Return true if A has every label in B.  */
+static bool _GL_ATTRIBUTE_PURE
+hasevery (struct tree const *a, struct tree const *b)
+{
+  if (!b)
+    return true;
+  if (!hasevery (a, b->llink))
+    return false;
+  if (!hasevery (a, b->rlink))
+    return false;
+  while (a && b->label != a->label)
+    if (b->label < a->label)
+      a = a->llink;
+    else
+      a = a->rlink;
+  return !!a;
+}
+
+/* Compute a vector, indexed by character code, of the trie nodes
+   referenced from the given tree.  */
+static void
+treenext (struct tree const *tree, struct trie *next[])
+{
+  if (!tree)
+    return;
+  treenext (tree->llink, next);
+  treenext (tree->rlink, next);
+  next[tree->label] = tree->trie;
+}
+
+/* Prepare a built keyword set for use.  */
+void
+kwsprep (kwset_t kwset)
+{
+  char const *trans = kwset->trans;
+  ptrdiff_t i;
+  unsigned char deltabuf[NCHAR];
+  unsigned char *delta = trans ? deltabuf : kwset->delta;
+  struct trie *curr, *last;
+
+  /* Use Boyer-Moore if just one pattern, Aho-Corasick otherwise.  */
+  bool reverse = kwset->words == 1;
+
+  if (reverse)
+    {
+      kwset_t new_kwset;
+
+      /* Enqueue the immediate descendants in the level order queue.  */
+      for (curr = last = kwset->trie; curr; curr = curr->next)
+        enqueue (curr->links, &last);
+
+      /* Looking for just one string.  Extract it from the trie.  */
+      kwset->target = obstack_alloc (&kwset->obstack, kwset->mind);
+      for (i = 0, curr = kwset->trie; i < kwset->mind; ++i)
+        {
+          kwset->target[i] = curr->links->label;
+          curr = curr->next;
+        }
+
+      new_kwset = kwsalloc (kwset->trans);
+      new_kwset->kwsexec = bmexec;
+      kwsincr (new_kwset, kwset->target, kwset->mind);
+      obstack_free (&kwset->obstack, NULL);
+      *kwset = *new_kwset;
+      free (new_kwset);
+    }
+
+  /* Initial values for the delta table; will be changed later.  The
+     delta entry for a given character is the smallest depth of any
+     node at which an outgoing edge is labeled by that character.  */
+  memset (delta, MIN (kwset->mind, UCHAR_MAX), sizeof deltabuf);
+
+  /* Traverse the nodes of the trie in level order, simultaneously
+     computing the delta table, failure function, and shift function.  */
+  for (curr = last = kwset->trie; curr; curr = curr->next)
+    {
+      /* Enqueue the immediate descendants in the level order queue.  */
+      enqueue (curr->links, &last);
+
+      /* Update the delta table for the descendants of this node.  */
+      treedelta (curr->links, curr->depth, delta);
+
+      /* Compute the failure function for the descendants of this node.  */
+      treefails (curr->links, curr->fail, kwset->trie, reverse);
+
+      if (reverse)
+        {
+          curr->shift = kwset->mind;
+          curr->maxshift = kwset->mind;
+
+          /* Update the shifts at each node in the current node's chain
+             of fails back to the root.  */
+          struct trie *fail;
+          for (fail = curr->fail; fail; fail = fail->fail)
+            {
+              /* If the current node has some outgoing edge that the fail
+                 doesn't, then the shift at the fail should be no larger
+                 than the difference of their depths.  */
+              if (!hasevery (fail->links, curr->links))
+                if (curr->depth - fail->depth < fail->shift)
+                  fail->shift = curr->depth - fail->depth;
+
+              /* If the current node is accepting then the shift at the
+                 fail and its descendants should be no larger than the
+                 difference of their depths.  */
+              if (curr->accepting && fail->maxshift > curr->depth - fail->depth)
+                fail->maxshift = curr->depth - fail->depth;
+            }
+        }
+    }
+
+  if (reverse)
+    {
+      /* Traverse the trie in level order again, fixing up all nodes whose
+         shift exceeds their inherited maxshift.  */
+      for (curr = kwset->trie->next; curr; curr = curr->next)
+        {
+          if (curr->maxshift > curr->parent->maxshift)
+            curr->maxshift = curr->parent->maxshift;
+          if (curr->shift > curr->maxshift)
+            curr->shift = curr->maxshift;
+        }
+    }
+
+  /* Create a vector, indexed by character code, of the outgoing links
+     from the root node.  Accumulate GC1 and GC1HELP.  */
+  struct trie *nextbuf[NCHAR];
+  struct trie **next = trans ? nextbuf : kwset->next;
+  memset (next, 0, sizeof nextbuf);
+  treenext (kwset->trie->links, next);
+  int gc1 = -2;
+  int gc1help = -1;
+  for (i = 0; i < NCHAR; i++)
+    {
+      int ti = i;
+      if (trans)
+        {
+          ti = U(trans[i]);
+          kwset->next[i] = next[ti];
+        }
+      if (kwset->next[i])
+        {
+          if (gc1 < -1)
+            {
+              gc1 = ti;
+              gc1help = i;
+            }
+          else if (gc1 == ti)
+            gc1help = gc1help == ti ? i : -1;
+          else if (i == ti && gc1 == gc1help)
+            gc1help = i;
+          else
+            gc1 = -1;
+        }
+    }
+  kwset->gc1 = gc1;
+  kwset->gc1help = gc1help;
+
+  if (reverse)
+    {
+      /* Looking for just one string.  Extract it from the trie.  */
+      kwset->target = obstack_alloc (&kwset->obstack, kwset->mind);
+      for (i = kwset->mind - 1, curr = kwset->trie; i >= 0; --i)
+        {
+          kwset->target[i] = curr->links->label;
+          curr = curr->next;
+        }
+
+      if (kwset->mind > 1)
+        {
+          /* Looking for the delta2 shift that might be made after a
+             backwards match has failed.  Extract it from the trie.  */
+          kwset->shift
+            = obstack_alloc (&kwset->obstack,
+                             sizeof *kwset->shift * (kwset->mind - 1));
+          for (i = 0, curr = kwset->trie->next; i < kwset->mind - 1; ++i)
+            {
+              kwset->shift[i] = curr->shift;
+              curr = curr->next;
+            }
+
+          /* The penultimate byte.  */
+          kwset->gc2 = tr (trans, kwset->target[kwset->mind - 2]);
+        }
+    }
+
+  /* Fix things up for any translation table.  */
+  if (trans)
+    for (i = 0; i < NCHAR; ++i)
+      kwset->delta[i] = delta[U(trans[i])];
+}
+
+/* Delta2 portion of a Boyer-Moore search.  *TP is the string text
+   pointer; it is updated in place.  EP is the end of the string text,
+   and SP the end of the pattern.  LEN is the pattern length; it must
+   be at least 2.  TRANS, if nonnull, is the input translation table.
+   GC1 and GC2 are the last and second-from last bytes of the pattern,
+   transliterated by TRANS; the caller precomputes them for
+   efficiency.  If D1 is nonnull, it is a delta1 table for shifting *TP
+   when failing.  KWSET->shift says how much to shift.  */
+static inline bool
+bm_delta2_search (char const **tpp, char const *ep, char const *sp,
+                  ptrdiff_t len,
+                  char const *trans, char gc1, char gc2,
+                  unsigned char const *d1, kwset_t kwset)
+{
+  char const *tp = *tpp;
+  ptrdiff_t d = len, skip = 0;
+
+  while (true)
+    {
+      ptrdiff_t i = 2;
+      if (tr (trans, tp[-2]) == gc2)
+        {
+          while (++i <= d)
+            if (tr (trans, tp[-i]) != tr (trans, sp[-i]))
+              break;
+          if (i > d)
+            {
+              for (i = d + skip + 1; i <= len; ++i)
+                if (tr (trans, tp[-i]) != tr (trans, sp[-i]))
+                  break;
+              if (i > len)
+                {
+                  *tpp = tp - len;
+                  return true;
+                }
+            }
+        }
+
+      tp += d = kwset->shift[i - 2];
+      if (tp > ep)
+        break;
+      if (tr (trans, tp[-1]) != gc1)
+        {
+          if (d1)
+            tp += d1[U(tp[-1])];
+          break;
+        }
+      skip = i - 1;
+    }
+
+  *tpp = tp;
+  return false;
+}
+
+/* Return the address of the first byte in the buffer S (of size N)
+   that matches the terminal byte specified by KWSET, or NULL if there
+   is no match.  KWSET->gc1 should be nonnegative.  */
+static char const *
+memchr_kwset (char const *s, ptrdiff_t n, kwset_t kwset)
+{
+  char const *slim = s + n;
+  if (kwset->gc1help < 0)
+    {
+      for (; s < slim; s++)
+        if (kwset->next[U(*s)])
+          return s;
+    }
+  else
+    {
+      int small_heuristic = 2;
+      size_t small_bytes = small_heuristic * sizeof (unsigned long int);
+      while (s < slim)
+        {
+          if (kwset->next[U(*s)])
+            return s;
+          s++;
+          if ((uintptr_t) s % small_bytes == 0)
+            return memchr2 (s, kwset->gc1, kwset->gc1help, slim - s);
+        }
+    }
+  return NULL;
+}
+
+/* Fast Boyer-Moore search (inlinable version).  */
+static inline ptrdiff_t _GL_ATTRIBUTE_PURE
+bmexec_trans (kwset_t kwset, char const *text, ptrdiff_t size)
+{
+  assume (0 <= size);
+  unsigned char const *d1;
+  char const *ep, *sp, *tp;
+  int d;
+  ptrdiff_t len = kwset->mind;
+  char const *trans = kwset->trans;
+
+  if (len == 0)
+    return 0;
+  if (len > size)
+    return -1;
+  if (len == 1)
+    {
+      tp = memchr_kwset (text, size, kwset);
+      return tp ? tp - text : -1;
+    }
+
+  d1 = kwset->delta;
+  sp = kwset->target + len;
+  tp = text + len;
+  char gc1 = kwset->gc1;
+  char gc2 = kwset->gc2;
+
+  /* Significance of 12: 1 (initial offset) + 10 (skip loop) + 1 (md2).  */
+  ptrdiff_t len12;
+  if (!INT_MULTIPLY_WRAPV (len, 12, &len12) && len12 < size)
+    /* 11 is not a bug, the initial offset happens only once.  */
+    for (ep = text + size - 11 * len; tp <= ep; )
+      {
+        char const *tp0 = tp;
+        d = d1[U(tp[-1])], tp += d;
+        d = d1[U(tp[-1])], tp += d;
+        if (d != 0)
+          {
+            d = d1[U(tp[-1])], tp += d;
+            d = d1[U(tp[-1])], tp += d;
+            d = d1[U(tp[-1])], tp += d;
+            if (d != 0)
+              {
+                d = d1[U(tp[-1])], tp += d;
+                d = d1[U(tp[-1])], tp += d;
+                d = d1[U(tp[-1])], tp += d;
+                if (d != 0)
+                  {
+                    d = d1[U(tp[-1])], tp += d;
+                    d = d1[U(tp[-1])], tp += d;
+
+                    /* As a heuristic, prefer memchr to seeking by
+                       delta1 when the latter doesn't advance much.  */
+                    int advance_heuristic = 16 * sizeof (long);
+                    if (advance_heuristic <= tp - tp0)
+                      continue;
+                    tp--;
+                    tp = memchr_kwset (tp, text + size - tp, kwset);
+                    if (! tp)
+                      return -1;
+                    tp++;
+                    if (ep <= tp)
+                      break;
+                  }
+              }
+          }
+        if (bm_delta2_search (&tp, ep, sp, len, trans, gc1, gc2, d1, kwset))
+          return tp - text;
+      }
+
+  /* Now only a few characters are left to search.  Carefully avoid
+     ever producing an out-of-bounds pointer.  */
+  ep = text + size;
+  d = d1[U(tp[-1])];
+  while (d <= ep - tp)
+    {
+      d = d1[U((tp += d)[-1])];
+      if (d != 0)
+        continue;
+      if (bm_delta2_search (&tp, ep, sp, len, trans, gc1, gc2, NULL, kwset))
+        return tp - text;
+    }
+
+  return -1;
+}
+
+/* Fast Boyer-Moore search.  */
+static ptrdiff_t
+bmexec (kwset_t kwset, char const *text, ptrdiff_t size,
+        struct kwsmatch *kwsmatch, bool longest)
+{
+  /* Help the compiler inline in two ways, depending on whether
+     kwset->trans is null.  */
+  ptrdiff_t ret = (IGNORE_DUPLICATE_BRANCH_WARNING
+                   (kwset->trans
+                    ? bmexec_trans (kwset, text, size)
+                    : bmexec_trans (kwset, text, size)));
+  kwsmatch->index = 0;
+  kwsmatch->offset = ret;
+  kwsmatch->size = kwset->mind;
+  return ret;
+}
+
+/* Hairy multiple string search with the Aho-Corasick algorithm.
+   (inlinable version)  */
+static inline ptrdiff_t
+acexec_trans (kwset_t kwset, char const *text, ptrdiff_t len,
+              struct kwsmatch *kwsmatch, bool longest)
+{
+  struct trie const *trie, *accept;
+  char const *tp, *left, *lim;
+  struct tree const *tree;
+  char const *trans;
+
+  /* Initialize register copies and look for easy ways out.  */
+  if (len < kwset->mind)
+    return -1;
+  trans = kwset->trans;
+  trie = kwset->trie;
+  lim = text + len;
+  tp = text;
+
+  if (!trie->accepting)
+    {
+      unsigned char c;
+      int gc1 = kwset->gc1;
+
+      while (true)
+        {
+          if (gc1 < 0)
+            {
+              while (! (trie = kwset->next[c = tr (trans, *tp++)]))
+                if (tp >= lim)
+                  return -1;
+            }
+          else
+            {
+              tp = memchr_kwset (tp, lim - tp, kwset);
+              if (!tp)
+                return -1;
+              c = tr (trans, *tp++);
+              trie = kwset->next[c];
+            }
+
+          while (true)
+            {
+              if (trie->accepting)
+                goto match;
+              if (tp >= lim)
+                return -1;
+              c = tr (trans, *tp++);
+
+              for (tree = trie->links; c != tree->label; )
+                {
+                  tree = c < tree->label ? tree->llink : tree->rlink;
+                  if (! tree)
+                    {
+                      trie = trie->fail;
+                      if (!trie)
+                        {
+                          trie = kwset->next[c];
+                          if (trie)
+                            goto have_trie;
+                          if (tp >= lim)
+                            return -1;
+                          goto next_c;
+                        }
+                      if (trie->accepting)
+                        {
+                          --tp;
+                          goto match;
+                        }
+                      tree = trie->links;
+                    }
+                }
+              trie = tree->trie;
+            have_trie:;
+            }
+        next_c:;
+        }
+    }
+
+ match:
+  accept = trie;
+  while (accept->accepting == SIZE_MAX)
+    accept = accept->fail;
+  left = tp - accept->depth;
+
+  /* Try left-most longest match.  */
+  if (longest)
+    {
+      while (tp < lim)
+        {
+          struct trie const *accept1;
+          char const *left1;
+          unsigned char c = tr (trans, *tp++);
+
+          do
+            {
+              tree = trie->links;
+              while (tree && c != tree->label)
+                tree = c < tree->label ? tree->llink : tree->rlink;
+            }
+          while (!tree && (trie = trie->fail) && accept->depth <= trie->depth);
+
+          if (!tree)
+            break;
+          trie = tree->trie;
+          if (trie->accepting)
+            {
+              accept1 = trie;
+              while (accept1->accepting == SIZE_MAX)
+                accept1 = accept1->fail;
+              left1 = tp - accept1->depth;
+              if (left1 <= left)
+                {
+                  left = left1;
+                  accept = accept1;
+                }
+            }
+        }
+    }
+
+  kwsmatch->index = accept->accepting / 2;
+  kwsmatch->offset = left - text;
+  kwsmatch->size = accept->depth;
+
+  return left - text;
+}
+
+/* Hairy multiple string search with Aho-Corasick algorithm.  */
+static ptrdiff_t
+acexec (kwset_t kwset, char const *text, ptrdiff_t size,
+        struct kwsmatch *kwsmatch, bool longest)
+{
+  assume (0 <= size);
+  /* Help the compiler inline in two ways, depending on whether
+     kwset->trans is null.  */
+  return (IGNORE_DUPLICATE_BRANCH_WARNING
+          (kwset->trans
+           ? acexec_trans (kwset, text, size, kwsmatch, longest)
+           : acexec_trans (kwset, text, size, kwsmatch, longest)));
+}
+
+/* Find the first instance of a KWSET member in TEXT, which has SIZE bytes.
+   Return the offset (into TEXT) of the first byte of the matching substring,
+   or -1 if no match is found.  Upon a match, store details in
+   *KWSMATCH: index of matched keyword, start offset (same as the return
+   value), and length.  If LONGEST, find the longest match; otherwise
+   any match will do.  */
+ptrdiff_t
+kwsexec (kwset_t kwset, char const *text, ptrdiff_t size,
+         struct kwsmatch *kwsmatch, bool longest)
+{
+  return kwset->kwsexec (kwset, text, size, kwsmatch, longest);
+}
+
+/* Free the components of the given keyword set.  */
+void
+kwsfree (kwset_t kwset)
+{
+  obstack_free (&kwset->obstack, NULL);
+  free (kwset);
+}
diff --git a/src/grep/src/kwset.h b/src/grep/src/kwset.h
new file mode 100644
index 0000000..24e13e2
--- /dev/null
+++ b/src/grep/src/kwset.h
@@ -0,0 +1,44 @@
+/* kwset.h - header declaring the keyword set library.
+   Copyright (C) 1989, 1998, 2005, 2007, 2009-2021 Free Software Foundation,
+   Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+/* Written August 1989 by Mike Haertel.  */
+
+#include <stddef.h>
+#include <stdbool.h>
+
+struct kwsmatch
+{
+  ptrdiff_t index;	/* Index number of matching keyword.  */
+  ptrdiff_t offset;	/* Offset of match.  */
+  ptrdiff_t size;	/* Length of match.  */
+};
+
+#include "arg-nonnull.h"
+
+struct kwset;
+typedef struct kwset *kwset_t;
+
+extern kwset_t kwsalloc (char const *);
+extern void kwsincr (kwset_t, char const *, ptrdiff_t);
+extern ptrdiff_t kwswords (kwset_t) _GL_ATTRIBUTE_PURE;
+extern void kwsprep (kwset_t);
+extern ptrdiff_t kwsexec (kwset_t, char const *, ptrdiff_t,
+                          struct kwsmatch *, bool)
+  _GL_ARG_NONNULL ((4));
+extern void kwsfree (kwset_t);
diff --git a/src/grep/src/pcresearch.c b/src/grep/src/pcresearch.c
new file mode 100644
index 0000000..37f7e40
--- /dev/null
+++ b/src/grep/src/pcresearch.c
@@ -0,0 +1,352 @@
+/* pcresearch.c - searching subroutines using PCRE for grep.
+   Copyright 2000, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+/* Written August 1992 by Mike Haertel. */
+
+#include <config.h>
+#include "search.h"
+#include "die.h"
+
+#include <pcre.h>
+
+/* This must be at least 2; everything after that is for performance
+   in pcre_exec.  */
+enum { NSUB = 300 };
+
+#ifndef PCRE_EXTRA_MATCH_LIMIT_RECURSION
+# define PCRE_EXTRA_MATCH_LIMIT_RECURSION 0
+#endif
+#ifndef PCRE_STUDY_JIT_COMPILE
+# define PCRE_STUDY_JIT_COMPILE 0
+#endif
+#ifndef PCRE_STUDY_EXTRA_NEEDED
+# define PCRE_STUDY_EXTRA_NEEDED 0
+#endif
+
+struct pcre_comp
+{
+  /* Compiled internal form of a Perl regular expression.  */
+  pcre *cre;
+
+  /* Additional information about the pattern.  */
+  pcre_extra *extra;
+
+#if PCRE_STUDY_JIT_COMPILE
+  /* The JIT stack and its maximum size.  */
+  pcre_jit_stack *jit_stack;
+  int jit_stack_size;
+#endif
+
+  /* Table, indexed by ! (flag & PCRE_NOTBOL), of whether the empty
+     string matches when that flag is used.  */
+  int empty_match[2];
+};
+
+
+/* Match the already-compiled PCRE pattern against the data in SUBJECT,
+   of size SEARCH_BYTES and starting with offset SEARCH_OFFSET, with
+   options OPTIONS, and storing resulting matches into SUB.  Return
+   the (nonnegative) match location or a (negative) error number.  */
+static int
+jit_exec (struct pcre_comp *pc, char const *subject, int search_bytes,
+          int search_offset, int options, int *sub)
+{
+  while (true)
+    {
+      int e = pcre_exec (pc->cre, pc->extra, subject, search_bytes,
+                         search_offset, options, sub, NSUB);
+
+#if PCRE_STUDY_JIT_COMPILE
+      if (e == PCRE_ERROR_JIT_STACKLIMIT
+          && 0 < pc->jit_stack_size && pc->jit_stack_size <= INT_MAX / 2)
+        {
+          int old_size = pc->jit_stack_size;
+          int new_size = pc->jit_stack_size = old_size * 2;
+          if (pc->jit_stack)
+            pcre_jit_stack_free (pc->jit_stack);
+          pc->jit_stack = pcre_jit_stack_alloc (old_size, new_size);
+          if (!pc->jit_stack)
+            die (EXIT_TROUBLE, 0,
+                 _("failed to allocate memory for the PCRE JIT stack"));
+          pcre_assign_jit_stack (pc->extra, NULL, pc->jit_stack);
+          continue;
+        }
+#endif
+
+#if PCRE_EXTRA_MATCH_LIMIT_RECURSION
+      if (e == PCRE_ERROR_RECURSIONLIMIT
+          && (PCRE_STUDY_EXTRA_NEEDED || pc->extra))
+        {
+          unsigned long lim
+            = (pc->extra->flags & PCRE_EXTRA_MATCH_LIMIT_RECURSION
+               ? pc->extra->match_limit_recursion
+               : 0);
+          if (lim <= ULONG_MAX / 2)
+            {
+              pc->extra->match_limit_recursion = lim ? 2 * lim : (1 << 24) - 1;
+              pc->extra->flags |= PCRE_EXTRA_MATCH_LIMIT_RECURSION;
+              continue;
+            }
+        }
+#endif
+
+      return e;
+    }
+}
+
+/* Compile the -P style PATTERN, containing SIZE bytes that are
+   followed by '\n'.  Return a description of the compiled pattern.  */
+
+void *
+Pcompile (char *pattern, size_t size, reg_syntax_t ignored, bool exact)
+{
+  int e;
+  char const *ep;
+  static char const wprefix[] = "(?<!\\w)(?:";
+  static char const wsuffix[] = ")(?!\\w)";
+  static char const xprefix[] = "^(?:";
+  static char const xsuffix[] = ")$";
+  int fix_len_max = MAX (sizeof wprefix - 1 + sizeof wsuffix - 1,
+                         sizeof xprefix - 1 + sizeof xsuffix - 1);
+  char *re = xnmalloc (4, size + (fix_len_max + 4 - 1) / 4);
+  int flags = PCRE_DOLLAR_ENDONLY | (match_icase ? PCRE_CASELESS : 0);
+  char *patlim = pattern + size;
+  char *n = re;
+  char const *p;
+  char const *pnul;
+  struct pcre_comp *pc = xcalloc (1, sizeof (*pc));
+
+  if (localeinfo.multibyte)
+    {
+      if (! localeinfo.using_utf8)
+        die (EXIT_TROUBLE, 0, _("-P supports only unibyte and UTF-8 locales"));
+      flags |= PCRE_UTF8;
+    }
+
+  /* FIXME: Remove this restriction.  */
+  if (rawmemchr (pattern, '\n') != patlim)
+    die (EXIT_TROUBLE, 0, _("the -P option only supports a single pattern"));
+
+  *n = '\0';
+  if (match_words)
+    strcpy (n, wprefix);
+  if (match_lines)
+    strcpy (n, xprefix);
+  n += strlen (n);
+
+  /* The PCRE interface doesn't allow NUL bytes in the pattern, so
+     replace each NUL byte in the pattern with the four characters
+     "\000", removing a preceding backslash if there are an odd
+     number of backslashes before the NUL.  */
+  *patlim = '\0';
+  for (p = pattern; (pnul = p + strlen (p)) < patlim; p = pnul + 1)
+    {
+      memcpy (n, p, pnul - p);
+      n += pnul - p;
+      for (p = pnul; pattern < p && p[-1] == '\\'; p--)
+        continue;
+      n -= (pnul - p) & 1;
+      strcpy (n, "\\000");
+      n += 4;
+    }
+  memcpy (n, p, patlim - p + 1);
+  n += patlim - p;
+  *patlim = '\n';
+
+  if (match_words)
+    strcpy (n, wsuffix);
+  if (match_lines)
+    strcpy (n, xsuffix);
+
+  pc->cre = pcre_compile (re, flags, &ep, &e, pcre_maketables ());
+  if (!pc->cre)
+    die (EXIT_TROUBLE, 0, "%s", ep);
+
+  int pcre_study_flags = PCRE_STUDY_EXTRA_NEEDED | PCRE_STUDY_JIT_COMPILE;
+  pc->extra = pcre_study (pc->cre, pcre_study_flags, &ep);
+  if (ep)
+    die (EXIT_TROUBLE, 0, "%s", ep);
+
+#if PCRE_STUDY_JIT_COMPILE
+  if (pcre_fullinfo (pc->cre, pc->extra, PCRE_INFO_JIT, &e))
+    die (EXIT_TROUBLE, 0, _("internal error (should never happen)"));
+
+  /* The PCRE documentation says that a 32 KiB stack is the default.  */
+  if (e)
+    pc->jit_stack_size = 32 << 10;
+#endif
+
+  free (re);
+
+  int sub[NSUB];
+  pc->empty_match[false] = pcre_exec (pc->cre, pc->extra, "", 0, 0,
+                                      PCRE_NOTBOL, sub, NSUB);
+  pc->empty_match[true] = pcre_exec (pc->cre, pc->extra, "", 0, 0, 0, sub,
+                                     NSUB);
+
+  return pc;
+}
+
+size_t
+Pexecute (void *vcp, char const *buf, size_t size, size_t *match_size,
+          char const *start_ptr)
+{
+  int sub[NSUB];
+  char const *p = start_ptr ? start_ptr : buf;
+  bool bol = p[-1] == eolbyte;
+  char const *line_start = buf;
+  int e = PCRE_ERROR_NOMATCH;
+  char const *line_end;
+  struct pcre_comp *pc = vcp;
+
+  /* The search address to pass to pcre_exec.  This is the start of
+     the buffer, or just past the most-recently discovered encoding
+     error or line end.  */
+  char const *subject = buf;
+
+  do
+    {
+      /* Search line by line.  Although this code formerly used
+         PCRE_MULTILINE for performance, the performance wasn't always
+         better and the correctness issues were too puzzling.  See
+         Bug#22655.  */
+      line_end = rawmemchr (p, eolbyte);
+      if (INT_MAX < line_end - p)
+        die (EXIT_TROUBLE, 0, _("exceeded PCRE's line length limit"));
+
+      for (;;)
+        {
+          /* Skip past bytes that are easily determined to be encoding
+             errors, treating them as data that cannot match.  This is
+             faster than having pcre_exec check them.  */
+          while (localeinfo.sbclen[to_uchar (*p)] == -1)
+            {
+              p++;
+              subject = p;
+              bol = false;
+            }
+
+          int search_offset = p - subject;
+
+          /* Check for an empty match; this is faster than letting
+             pcre_exec do it.  */
+          if (p == line_end)
+            {
+              sub[0] = sub[1] = search_offset;
+              e = pc->empty_match[bol];
+              break;
+            }
+
+          int options = 0;
+          if (!bol)
+            options |= PCRE_NOTBOL;
+
+          e = jit_exec (pc, subject, line_end - subject, search_offset,
+                        options, sub);
+          if (e != PCRE_ERROR_BADUTF8)
+            break;
+          int valid_bytes = sub[0];
+
+          if (search_offset <= valid_bytes)
+            {
+              /* Try to match the string before the encoding error.  */
+              if (valid_bytes == 0)
+                {
+                  /* Handle the empty-match case specially, for speed.
+                     This optimization is valid if VALID_BYTES is zero,
+                     which means SEARCH_OFFSET is also zero.  */
+                  sub[1] = 0;
+                  e = pc->empty_match[bol];
+                }
+              else
+                e = jit_exec (pc, subject, valid_bytes, search_offset,
+                              options | PCRE_NO_UTF8_CHECK | PCRE_NOTEOL, sub);
+
+              if (e != PCRE_ERROR_NOMATCH)
+                break;
+
+              /* Treat the encoding error as data that cannot match.  */
+              p = subject + valid_bytes + 1;
+              bol = false;
+            }
+
+          subject += valid_bytes + 1;
+        }
+
+      if (e != PCRE_ERROR_NOMATCH)
+        break;
+      bol = true;
+      p = subject = line_start = line_end + 1;
+    }
+  while (p < buf + size);
+
+  if (e <= 0)
+    {
+      switch (e)
+        {
+        case PCRE_ERROR_NOMATCH:
+          break;
+
+        case PCRE_ERROR_NOMEMORY:
+          die (EXIT_TROUBLE, 0, _("%s: memory exhausted"), input_filename ());
+
+#if PCRE_STUDY_JIT_COMPILE
+        case PCRE_ERROR_JIT_STACKLIMIT:
+          die (EXIT_TROUBLE, 0, _("%s: exhausted PCRE JIT stack"),
+               input_filename ());
+#endif
+
+        case PCRE_ERROR_MATCHLIMIT:
+          die (EXIT_TROUBLE, 0, _("%s: exceeded PCRE's backtracking limit"),
+               input_filename ());
+
+        case PCRE_ERROR_RECURSIONLIMIT:
+          die (EXIT_TROUBLE, 0, _("%s: exceeded PCRE's recursion limit"),
+               input_filename ());
+
+        default:
+          /* For now, we lump all remaining PCRE failures into this basket.
+             If anyone cares to provide sample grep usage that can trigger
+             particular PCRE errors, we can add to the list (above) of more
+             detailed diagnostics.  */
+          die (EXIT_TROUBLE, 0, _("%s: internal PCRE error: %d"),
+               input_filename (), e);
+        }
+
+      return -1;
+    }
+  else
+    {
+      char const *matchbeg = subject + sub[0];
+      char const *matchend = subject + sub[1];
+      char const *beg;
+      char const *end;
+      if (start_ptr)
+        {
+          beg = matchbeg;
+          end = matchend;
+        }
+      else
+        {
+          beg = line_start;
+          end = line_end + 1;
+        }
+      *match_size = end - beg;
+      return beg - buf;
+    }
+}
diff --git a/src/grep/src/search.h b/src/grep/src/search.h
new file mode 100644
index 0000000..4853583
--- /dev/null
+++ b/src/grep/src/search.h
@@ -0,0 +1,89 @@
+/* search.c - searching subroutines using dfa, kwset and regex for grep.
+   Copyright 1992, 1998, 2000, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+#ifndef GREP_SEARCH_H
+#define GREP_SEARCH_H 1
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <stdint.h>
+#include <wchar.h>
+#include <wctype.h>
+#include <regex.h>
+
+#include "system.h"
+#include "grep.h"
+#include "dfa.h"
+#include "kwset.h"
+#include "xalloc.h"
+#include "localeinfo.h"
+
+_GL_INLINE_HEADER_BEGIN
+#ifndef SEARCH_INLINE
+# define SEARCH_INLINE _GL_INLINE
+#endif
+
+/* This must be a signed type.  Each value is the difference in the size
+   of a character (in bytes) induced by converting to lower case.
+   The vast majority of values are 0, but a few are 1 or -1, so
+   technically, two bits may be sufficient.  */
+typedef signed char mb_len_map_t;
+
+/* searchutils.c */
+extern void wordinit (void);
+extern kwset_t kwsinit (bool);
+extern size_t wordchars_size (char const *, char const *) _GL_ATTRIBUTE_PURE;
+extern size_t wordchar_next (char const *, char const *) _GL_ATTRIBUTE_PURE;
+extern size_t wordchar_prev (char const *, char const *, char const *)
+  _GL_ATTRIBUTE_PURE;
+extern ptrdiff_t mb_goback (char const **, size_t *, char const *,
+                            char const *);
+
+/* dfasearch.c */
+extern void *GEAcompile (char *, size_t, reg_syntax_t, bool);
+extern size_t EGexecute (void *, char const *, size_t, size_t *, char const *);
+
+/* kwsearch.c */
+extern void *Fcompile (char *, size_t, reg_syntax_t, bool);
+extern size_t Fexecute (void *, char const *, size_t, size_t *, char const *);
+
+/* pcresearch.c */
+extern void *Pcompile (char *, size_t, reg_syntax_t, bool);
+extern size_t Pexecute (void *, char const *, size_t, size_t *, char const *);
+
+/* grep.c */
+extern struct localeinfo localeinfo;
+extern void fgrep_to_grep_pattern (char **, size_t *);
+
+/* Return the number of bytes in the character at the start of S, which
+   is of size N.  N must be positive.  MBS is the conversion state.
+   This acts like mbrlen, except it returns 1 when mbrlen would return 0,
+   and it is typically faster because of the cache.  */
+SEARCH_INLINE size_t
+mb_clen (char const *s, size_t n, mbstate_t *mbs)
+{
+  size_t len = localeinfo.sbclen[to_uchar (*s)];
+  return len == (size_t) -2 ? mbrlen (s, n, mbs) : len;
+}
+
+extern char const *input_filename (void);
+
+_GL_INLINE_HEADER_END
+
+#endif /* GREP_SEARCH_H */
diff --git a/src/grep/src/searchutils.c b/src/grep/src/searchutils.c
new file mode 100644
index 0000000..8058511
--- /dev/null
+++ b/src/grep/src/searchutils.c
@@ -0,0 +1,190 @@
+/* searchutils.c - helper subroutines for grep's matchers.
+   Copyright 1992, 1998, 2000, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+#include <config.h>
+
+#define SEARCH_INLINE _GL_EXTERN_INLINE
+#define SYSTEM_INLINE _GL_EXTERN_INLINE
+#include "search.h"
+
+/* For each byte B, sbwordchar[B] is true if B is a single-byte
+   character that is a word constituent, and is false otherwise.  */
+static bool sbwordchar[NCHAR];
+
+/* Whether -w considers WC to be a word constituent.  */
+static bool
+wordchar (wint_t wc)
+{
+  return wc == L'_' || iswalnum (wc);
+}
+
+void
+wordinit (void)
+{
+  for (int i = 0; i < NCHAR; i++)
+    sbwordchar[i] = wordchar (localeinfo.sbctowc[i]);
+}
+
+kwset_t
+kwsinit (bool mb_trans)
+{
+  char *trans = NULL;
+
+  if (match_icase && (MB_CUR_MAX == 1 || mb_trans))
+    {
+      trans = xmalloc (NCHAR);
+      /* If I is a single-byte character that becomes a different
+         single-byte character when uppercased, set trans[I]
+         to that character.  Otherwise, set trans[I] to I.  */
+      for (int i = 0; i < NCHAR; i++)
+        trans[i] = toupper (i);
+    }
+
+  return kwsalloc (trans);
+}
+
+/* In the buffer *MB_START, return the number of bytes needed to go
+   back from CUR to the previous boundary, where a "boundary" is the
+   start of a multibyte character or is an error-encoding byte.  The
+   buffer ends at END (i.e., one past the address of the buffer's last
+   byte).  If CUR is already at a boundary, return 0.  If CUR is no
+   larger than *MB_START, return CUR - *MB_START without modifying
+   *MB_START or *MBCLEN.
+
+   When returning zero, set *MB_START to CUR.  When returning a
+   positive value, set *MB_START to the next boundary after CUR,
+   or to END if there is no such boundary, and set *MBCLEN to the
+   length of the preceding character.  */
+ptrdiff_t
+mb_goback (char const **mb_start, size_t *mbclen, char const *cur,
+           char const *end)
+{
+  const char *p = *mb_start;
+  const char *p0 = p;
+  size_t clen;
+
+  if (cur <= p)
+    return cur - p;
+
+  if (localeinfo.using_utf8)
+    {
+      p = cur;
+      clen = 1;
+
+      if (cur < end && (*cur & 0xc0) == 0x80)
+        for (int i = 1; i <= 3; i++)
+          if ((cur[-i] & 0xc0) != 0x80)
+            {
+              mbstate_t mbs = { 0 };
+              clen = mb_clen (cur - i, end - (cur - i), &mbs);
+              if (i < clen && clen < (size_t) -2)
+                {
+                  p0 = cur - i;
+                  p = p0 + clen;
+                }
+              break;
+            }
+    }
+  else
+    {
+      mbstate_t mbs = { 0 };
+      do
+        {
+          clen = mb_clen (p, end - p, &mbs);
+
+          if ((size_t) -2 <= clen)
+            {
+              /* An invalid sequence, or a truncated multibyte character.
+                 Treat it as a single byte character.  */
+              clen = 1;
+              memset (&mbs, 0, sizeof mbs);
+            }
+          p0 = p;
+          p += clen;
+        }
+      while (p < cur);
+    }
+
+  *mb_start = p;
+  if (mbclen)
+    *mbclen = clen;
+  return p == cur ? 0 : cur - p0;
+}
+
+/* Examine the start of BUF (which goes to END) for word constituents.
+   If COUNTALL, examine as many as possible; otherwise, examine at most one.
+   Return the total number of bytes in the examined characters.  */
+static size_t
+wordchars_count (char const *buf, char const *end, bool countall)
+{
+  size_t n = 0;
+  mbstate_t mbs = { 0 };
+  while (n < end - buf)
+    {
+      unsigned char b = buf[n];
+      if (sbwordchar[b])
+        n++;
+      else if (localeinfo.sbclen[b] != -2)
+        break;
+      else
+        {
+          wchar_t wc = 0;
+          size_t wcbytes = mbrtowc (&wc, buf + n, end - buf - n, &mbs);
+          if (!wordchar (wc))
+            break;
+          n += wcbytes + !wcbytes;
+        }
+      if (!countall)
+        break;
+    }
+  return n;
+}
+
+/* Examine the start of BUF for the longest prefix containing just
+   word constituents.  Return the total number of bytes in the prefix.
+   The buffer ends at END.  */
+size_t
+wordchars_size (char const *buf, char const *end)
+{
+  return wordchars_count (buf, end, true);
+}
+
+/* If BUF starts with a word constituent, return the number of bytes
+   used to represent it; otherwise, return zero.  The buffer ends at END.  */
+size_t
+wordchar_next (char const *buf, char const *end)
+{
+  return wordchars_count (buf, end, false);
+}
+
+/* In the buffer BUF, return nonzero if the character whose encoding
+   contains the byte before CUR is a word constituent.  The buffer
+   ends at END.  */
+size_t
+wordchar_prev (char const *buf, char const *cur, char const *end)
+{
+  if (buf == cur)
+    return 0;
+  unsigned char b = *--cur;
+  if (! localeinfo.multibyte
+      || (localeinfo.using_utf8 && localeinfo.sbclen[b] == 1))
+    return sbwordchar[b];
+  char const *p = buf;
+  cur -= mb_goback (&p, NULL, cur, end);
+  return wordchar_next (cur, end);
+}
diff --git a/src/grep/src/system.h b/src/grep/src/system.h
new file mode 100644
index 0000000..2607f96
--- /dev/null
+++ b/src/grep/src/system.h
@@ -0,0 +1,132 @@
+/* Portability cruft.  Include after config.h and sys/types.h.
+   Copyright 1996, 1998-2000, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+#ifndef GREP_SYSTEM_H
+#define GREP_SYSTEM_H 1
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "configmake.h"
+#include "dirname.h"
+#include "ignore-value.h"
+#include "minmax.h"
+#include "same-inode.h"
+
+#include <stdlib.h>
+#include <stddef.h>
+#include <limits.h>
+#include <string.h>
+#include <ctype.h>
+
+enum { EXIT_TROUBLE = 2 };
+enum { NCHAR = UCHAR_MAX + 1 };
+
+#include <gettext.h>
+#define N_(String) gettext_noop(String)
+#define _(String) gettext(String)
+
+#include <locale.h>
+
+#ifndef initialize_main
+# define initialize_main(argcp, argvp)
+#endif
+
+#include "unlocked-io.h"
+
+_GL_INLINE_HEADER_BEGIN
+#ifndef SYSTEM_INLINE
+# define SYSTEM_INLINE _GL_INLINE
+#endif
+
+#define STREQ(a, b) (strcmp (a, b) == 0)
+
+/* Convert a possibly-signed character to an unsigned character.  This is
+   a bit safer than casting to unsigned char, since it catches some type
+   errors that the cast doesn't.  */
+SYSTEM_INLINE unsigned char
+to_uchar (char ch)
+{
+  return ch;
+}
+
+_GL_INLINE_HEADER_END
+
+#ifndef __has_feature
+# define __has_feature(F) false
+#endif
+
+#if defined __SANITIZE_ADDRESS__ || __has_feature (address_sanitizer)
+# define HAVE_ASAN 1
+#else
+# define HAVE_ASAN 0
+#endif
+
+#if HAVE_ASAN
+
+/* Mark memory region [addr, addr+size) as unaddressable.
+   This memory must be previously allocated by the user program.  Accessing
+   addresses in this region from instrumented code is forbidden until
+   this region is unpoisoned.  This function is not guaranteed to poison
+   the whole region - it may poison only a subregion of [addr, addr+size)
+   due to ASan alignment restrictions.
+   Method is NOT thread-safe in the sense that no two threads can
+   (un)poison memory in the same memory region simultaneously.  */
+void __asan_poison_memory_region (void const volatile *addr, size_t size);
+
+/* Mark memory region [addr, addr+size) as addressable.
+   This memory must be previously allocated by the user program.  Accessing
+   addresses in this region is allowed until this region is poisoned again.
+   This function may unpoison a superregion of [addr, addr+size) due to
+   ASan alignment restrictions.
+   Method is NOT thread-safe in the sense that no two threads can
+   (un)poison memory in the same memory region simultaneously.  */
+void __asan_unpoison_memory_region (void const volatile *addr, size_t size);
+
+#else
+
+static _GL_UNUSED void
+__asan_poison_memory_region (void const volatile *addr, size_t size) { }
+static _GL_UNUSED void
+__asan_unpoison_memory_region (void const volatile *addr, size_t size) { }
+#endif
+
+#ifndef FALLTHROUGH
+# if __GNUC__ < 7
+#  define FALLTHROUGH ((void) 0)
+# else
+#  define FALLTHROUGH __attribute__ ((__fallthrough__))
+# endif
+#endif
+
+/* When we deliberately use duplicate branches, use this macro to
+   disable gcc's -Wduplicated-branches in the containing expression.  */
+#if 7 <= __GNUC__
+# define IGNORE_DUPLICATE_BRANCH_WARNING(exp)				\
+  ({									\
+    _Pragma ("GCC diagnostic push")					\
+    _Pragma ("GCC diagnostic ignored \"-Wduplicated-branches\"")	\
+    exp;								\
+    _Pragma ("GCC diagnostic pop")					\
+  })
+#else
+# define IGNORE_DUPLICATE_BRANCH_WARNING(exp) exp
+#endif
+
+#endif
diff --git a/src/grep/tests/Coreutils.pm b/src/grep/tests/Coreutils.pm
new file mode 100644
index 0000000..3bb4d5d
--- /dev/null
+++ b/src/grep/tests/Coreutils.pm
@@ -0,0 +1,620 @@
+package Coreutils;
+# This is a testing framework.
+
+# Copyright (C) 1998-2015, 2017-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+use strict;
+use vars qw($VERSION @ISA @EXPORT);
+
+use FileHandle;
+use File::Compare qw(compare);
+
+@ISA = qw(Exporter);
+($VERSION = '$Revision: 1.5 $ ') =~ tr/[0-9].//cd;
+@EXPORT = qw (run_tests triple_test getlimits);
+
+my $debug = $ENV{DEBUG};
+
+my @Types = qw (IN IN_PIPE OUT ERR AUX CMP EXIT PRE POST OUT_SUBST
+                ERR_SUBST ENV ENV_DEL);
+my %Types = map {$_ => 1} @Types;
+my %Zero_one_type = map {$_ => 1}
+   qw (OUT ERR EXIT PRE POST OUT_SUBST ERR_SUBST ENV);
+my $srcdir = "$ENV{srcdir}";
+my $Global_count = 1;
+
+# When running in a DJGPP environment, make $ENV{SHELL} point to bash.
+# Otherwise, a bad shell might be used (e.g. command.com) and many
+# tests would fail.
+defined $ENV{DJDIR}
+  and $ENV{SHELL} = "$ENV{DJDIR}/bin/bash.exe";
+
+# A file spec: a scalar or a reference to a single-keyed hash
+# ================
+# 'contents'               contents only (file name is derived from test name)
+# {filename => 'contents'} filename and contents
+# {filename => undef}      filename only -- $(srcdir)/tests/filename must exist
+#
+# FIXME: If there is more than one input file, then you can't specify 'REDIR'.
+# PIPE is still ok.
+#
+# I/O spec: a hash ref with the following properties
+# ================
+# - one key/value pair
+# - the key must be one of these strings: IN, OUT, ERR, AUX, CMP, EXIT
+# - the value must be a file spec
+# {OUT => 'data'}    put data in a temp file and compare it to stdout from cmd
+# {OUT => {'filename'=>undef}} compare contents of existing filename to
+#           stdout from cmd
+# {OUT => {'filename'=>[$CTOR, $DTOR]}} $CTOR and $DTOR are references to
+#           functions, each which is passed the single argument 'filename'.
+#           $CTOR must create 'filename'.
+#           DTOR may be omitted in which case 'sub{unlink @_[0]}' is used.
+#           FIXME: implement this
+# {ERR => ...}
+#           Same as for OUT, but compare with stderr, not stdout.
+# {OUT_SUBST => 's/variable_output/expected_output/'}
+#   Transform actual standard output before comparing it against expected.
+#   This is useful e.g. for programs like du that produce output that
+#   varies a lot from system.  E.g., an empty file may consume zero file
+#   blocks, or more, depending on the OS and on the file system type.
+# {ERR_SUBST => 's/variable_output/expected_output/'}
+#   Transform actual stderr output before comparing it against expected.
+#   This is useful when verifying that we get a meaningful diagnostic.
+#   For example, in rm/fail-2eperm, we have to account for three different
+#   diagnostics: Operation not permitted, Not owner, and Permission denied.
+# {EXIT => N} expect exit status of cmd to be N
+# {ENV => 'VAR=val ...'}
+#   Prepend 'VAR=val ...' to the command that we execute via 'system'.
+# {ENV_DEL => 'VAR'}
+#   Remove VAR from the environment just before running the corresponding
+#   command, and restore any value just afterwards.
+#
+# There may be many input file specs.  File names from the input specs
+# are concatenated in order on the command line.
+# There may be at most one of the OUT-, ERR-, and EXIT-keyed specs.
+# If the OUT-(or ERR)-keyed hash ref is omitted, then expect no output
+#   on stdout (or stderr).
+# If the EXIT-keyed one is omitted, then expect the exit status to be zero.
+
+# FIXME: Make sure that no junkfile is also listed as a
+# non-junkfile (i.e., with undef for contents)
+
+sub _shell_quote ($)
+{
+  my ($string) = @_;
+  $string =~ s/\'/\'\\\'\'/g;
+  return "'$string'";
+}
+
+sub _create_file ($$$$)
+{
+  my ($program_name, $test_name, $file_name, $data) = @_;
+  my $file;
+  if (defined $file_name)
+    {
+      $file = $file_name;
+    }
+  else
+    {
+      $file = "$test_name.$Global_count";
+      ++$Global_count;
+    }
+
+  warn "creating file '$file' with contents '$data'\n" if $debug;
+
+  # The test spec gave a string.
+  # Write it to a temp file and return tempfile name.
+  my $fh = new FileHandle "> $file";
+  die "$program_name: $file: $!\n" if ! $fh;
+  print $fh $data;
+  $fh->close || die "$program_name: $file: $!\n";
+
+  return $file;
+}
+
+sub _compare_files ($$$$$)
+{
+  my ($program_name, $test_name, $in_or_out, $actual, $expected) = @_;
+
+  my $differ = compare ($actual, $expected);
+  if ($differ)
+    {
+      my $info = (defined $in_or_out ? "std$in_or_out " : '');
+      warn "$program_name: test $test_name: ${info}mismatch, comparing "
+        . "$expected (expected) and $actual (actual)\n";
+      # Ignore any failure, discard stderr.
+      system "diff -c $expected $actual 2>/dev/null";
+    }
+
+  return $differ;
+}
+
+sub _process_file_spec ($$$$$)
+{
+  my ($program_name, $test_name, $file_spec, $type, $junk_files) = @_;
+
+  my ($file_name, $contents);
+  if (!ref $file_spec)
+    {
+      ($file_name, $contents) = (undef, $file_spec);
+    }
+  elsif (ref $file_spec eq 'HASH')
+    {
+      my $n = keys %$file_spec;
+      die "$program_name: $test_name: $type spec has $n elements --"
+        . " expected 1\n"
+          if $n != 1;
+      ($file_name, $contents) = each %$file_spec;
+
+      # This happens for the AUX hash in an io_spec like this:
+      # {CMP=> ['zy123utsrqponmlkji', {'@AUX@'=> undef}]},
+      defined $contents
+        or return $file_name;
+    }
+  else
+    {
+      die "$program_name: $test_name: invalid RHS in $type-spec\n"
+    }
+
+  my $is_junk_file = (! defined $file_name
+                      || (($type eq 'IN' || $type eq 'AUX' || $type eq 'CMP')
+                          && defined $contents));
+  my $file = _create_file ($program_name, $test_name,
+                           $file_name, $contents);
+
+  if ($is_junk_file)
+    {
+      push @$junk_files, $file
+    }
+  else
+    {
+      # FIXME: put $srcdir in here somewhere
+      warn "$program_name: $test_name: specified file '$file' does"
+        . " not exist\n"
+          if ! -f "$srcdir/tests/$file";
+    }
+
+  return $file;
+}
+
+sub _at_replace ($$)
+{
+  my ($map, $s) = @_;
+  foreach my $eo (qw (AUX OUT ERR))
+    {
+      my $f = $map->{$eo};
+      $f
+        and $s =~ /\@$eo\@/
+          and $s =~ s/\@$eo\@/$f/g;
+    }
+  return $s;
+}
+
+sub getlimits()
+{
+  my $NV;
+  open $NV, "getlimits |" or die "Error running getlimits\n";
+  my %limits = map {split /=|\n/} <$NV>;
+  return \%limits;
+}
+
+# FIXME: cleanup on interrupt
+# FIXME: extract 'do_1_test' function
+
+# FIXME: having to include $program_name here is an expedient kludge.
+# Library code doesn't 'die'.
+sub run_tests ($$$$$)
+{
+  my ($program_name, $prog, $t_spec, $save_temps, $verbose) = @_;
+
+  # To indicate that $prog is a shell built-in, you'd make it a string 'ref'.
+  # E.g., call run_tests ($prog, \$prog, \@Tests, $save_temps, $verbose);
+  # If it's a ref, invoke it via "env":
+  my @prog = ref $prog ? (qw(env --), $$prog) : $prog;
+
+  # Warn about empty t_spec.
+  # FIXME
+
+  # Remove all temp files upon interrupt.
+  # FIXME
+
+  # Verify that test names are distinct.
+  my $bad_test_name = 0;
+  my %seen;
+  my %seen_8dot3;
+  my $t;
+  foreach $t (@$t_spec)
+    {
+      my $test_name = $t->[0];
+      if ($seen{$test_name})
+        {
+          warn "$program_name: $test_name: duplicate test name\n";
+          $bad_test_name = 1;
+        }
+      $seen{$test_name} = 1;
+
+      if (0)
+        {
+          my $t8 = lc substr $test_name, 0, 8;
+          if ($seen_8dot3{$t8})
+            {
+              warn "$program_name: 8.3 test name conflict: "
+                . "$test_name, $seen_8dot3{$t8}\n";
+              $bad_test_name = 1;
+            }
+          $seen_8dot3{$t8} = $test_name;
+        }
+
+      # The test name may be no longer than 30 bytes.
+      # Yes, this is an arbitrary limit.  If it causes trouble,
+      # consider removing it.
+      my $max = 30;
+      if ($max < length $test_name)
+        {
+          warn "$program_name: $test_name: test name is too long (> $max)\n";
+          $bad_test_name = 1;
+        }
+    }
+  return 1 if $bad_test_name;
+
+  # FIXME check exit status
+  system (@prog, '--version') if $verbose;
+
+  my @junk_files;
+  my $fail = 0;
+  foreach my $tt (@$t_spec)
+    {
+      my @post_compare;
+      my @dummy = @$tt;
+      my $t = \@dummy;
+      my $test_name = shift @$t;
+      my $expect = {};
+      my ($pre, $post);
+
+      # FIXME: maybe don't reset this.
+      $Global_count = 1;
+      my @args;
+      my $io_spec;
+      my %seen_type;
+      my @env_delete;
+      my $env_prefix = '';
+      my $input_pipe_cmd;
+      foreach $io_spec (@$t)
+        {
+          if (!ref $io_spec)
+            {
+              push @args, $io_spec;
+              next;
+            }
+
+          if (ref $io_spec ne 'HASH')
+            {
+              eval 'use Data::Dumper';
+              die "$program_name: $test_name: invalid entry in test spec; "
+                . "expected HASH-ref,\nbut got this:\n"
+                  . Data::Dumper->Dump ([\$io_spec], ['$io_spec']) . "\n";
+            }
+
+          my $n = keys %$io_spec;
+          die "$program_name: $test_name: spec has $n elements --"
+            . " expected 1\n"
+              if $n != 1;
+          my ($type, $val) = each %$io_spec;
+          die "$program_name: $test_name: invalid key '$type' in test spec\n"
+            if ! $Types{$type};
+
+          # Make sure there's no more than one of OUT, ERR, EXIT, etc.
+          die "$program_name: $test_name: more than one $type spec\n"
+            if $Zero_one_type{$type} and $seen_type{$type}++;
+
+          if ($type eq 'PRE' or $type eq 'POST')
+            {
+              $expect->{$type} = $val;
+              next;
+            }
+
+          if ($type eq 'CMP')
+            {
+              my $t = ref $val;
+              $t && $t eq 'ARRAY'
+                or die "$program_name: $test_name: invalid CMP spec\n";
+              @$val == 2
+                or die "$program_name: $test_name: invalid CMP list;  must have"
+                  . " exactly 2 elements\n";
+              my @cmp_files;
+              foreach my $e (@$val)
+                {
+                  my $r = ref $e;
+                  $r && $r ne 'HASH'
+                    and die "$program_name: $test_name: invalid element ($r)"
+                      . " in CMP list;  only scalars and hash references "
+                        . "are allowed\n";
+                  if ($r && $r eq 'HASH')
+                    {
+                      my $n = keys %$e;
+                      $n == 1
+                        or die "$program_name: $test_name: CMP spec has $n "
+                          . "elements -- expected 1\n";
+
+                      # Replace any '@AUX@' in the key of %$e.
+                      my ($ff, $val) = each %$e;
+                      my $new_ff = _at_replace $expect, $ff;
+                      if ($new_ff ne $ff)
+                        {
+                          $e->{$new_ff} = $val;
+                          delete $e->{$ff};
+                        }
+                    }
+                  my $cmp_file = _process_file_spec ($program_name, $test_name,
+                                                     $e, $type, \@junk_files);
+                  push @cmp_files, $cmp_file;
+                }
+              push @post_compare, [@cmp_files];
+
+              $expect->{$type} = $val;
+              next;
+            }
+
+          if ($type eq 'EXIT')
+            {
+              die "$program_name: $test_name: invalid EXIT code\n"
+                if $val !~ /^\d+$/;
+              # FIXME: make sure $data is numeric
+              $expect->{EXIT} = $val;
+              next;
+            }
+
+          if ($type =~ /^(OUT|ERR)_SUBST$/)
+            {
+              $expect->{RESULT_SUBST} ||= {};
+              $expect->{RESULT_SUBST}->{$1} = $val;
+              next;
+            }
+
+          if ($type eq 'ENV')
+            {
+              $env_prefix = "$val ";
+              next;
+            }
+
+          if ($type eq 'ENV_DEL')
+            {
+              push @env_delete, $val;
+              next;
+            }
+
+          my $file = _process_file_spec ($program_name, $test_name, $val,
+                                         $type, \@junk_files);
+
+          if ($type eq 'IN' || $type eq 'IN_PIPE')
+            {
+              my $quoted_file = _shell_quote $file;
+              if ($type eq 'IN_PIPE')
+                {
+                  defined $input_pipe_cmd
+                    and die "$program_name: $test_name: only one input"
+                      . " may be specified with IN_PIPE\n";
+                  $input_pipe_cmd = "cat $quoted_file |";
+                }
+              else
+                {
+                  push @args, $quoted_file;
+                }
+            }
+          elsif ($type eq 'AUX' || $type eq 'OUT' || $type eq 'ERR')
+            {
+              $expect->{$type} = $file;
+            }
+          else
+            {
+              die "$program_name: $test_name: invalid type: $type\n"
+            }
+        }
+
+      # Expect an exit status of zero if it's not specified.
+      $expect->{EXIT} ||= 0;
+
+      # Allow ERR to be omitted -- in that case, expect no error output.
+      foreach my $eo (qw (OUT ERR))
+        {
+          if (!exists $expect->{$eo})
+            {
+              $expect->{$eo} = _create_file ($program_name, $test_name,
+                                             undef, '');
+              push @junk_files, $expect->{$eo};
+            }
+        }
+
+      # FIXME: Does it ever make sense to specify a filename *and* contents
+      # in OUT or ERR spec?
+
+      # FIXME: this is really suboptimal...
+      my @new_args;
+      foreach my $a (@args)
+        {
+          $a = _at_replace $expect, $a;
+          push @new_args, $a;
+        }
+      @args = @new_args;
+
+      warn "$test_name...\n" if $verbose;
+      &{$expect->{PRE}} if $expect->{PRE};
+      my %actual;
+      $actual{OUT} = "$test_name.O";
+      $actual{ERR} = "$test_name.E";
+      push @junk_files, $actual{OUT}, $actual{ERR};
+      my @cmd = (@prog, @args, "> $actual{OUT}", "2> $actual{ERR}");
+      $env_prefix
+        and unshift @cmd, $env_prefix;
+      defined $input_pipe_cmd
+        and unshift @cmd, $input_pipe_cmd;
+      my $cmd_str = join (' ', @cmd);
+
+      # Delete from the environment any symbols specified by syntax
+      # like this: {ENV_DEL => 'TZ'}.
+      my %pushed_env;
+      foreach my $env_sym (@env_delete)
+        {
+          my $val = delete $ENV{$env_sym};
+          defined $val
+            and $pushed_env{$env_sym} = $val;
+        }
+
+      warn "Running command: '$cmd_str'\n" if $debug;
+      my $rc = 0xffff & system $cmd_str;
+
+      # Restore any environment setting we changed via a deletion.
+      foreach my $env_sym (keys %pushed_env)
+        {
+          $ENV{$env_sym} = $pushed_env{$env_sym};
+        }
+
+      if ($rc == 0xff00)
+        {
+          warn "$program_name: test $test_name failed: command failed:\n"
+            . "  '$cmd_str': $!\n";
+          $fail = 1;
+          goto cleanup;
+        }
+      $rc >>= 8 if $rc > 0x80;
+      if ($expect->{EXIT} != $rc)
+        {
+          warn "$program_name: test $test_name failed: exit status mismatch:"
+            . "  expected $expect->{EXIT}, got $rc\n";
+          $fail = 1;
+          goto cleanup;
+        }
+
+      my %actual_data;
+      # Record actual stdout and stderr contents, if POST may need them.
+      if ($expect->{POST})
+        {
+          foreach my $eo (qw (OUT ERR))
+            {
+              my $out_file = $actual{$eo};
+              open IN, $out_file
+                or (warn
+                    "$program_name: cannot open $out_file for reading: $!\n"),
+                  $fail = 1, next;
+              $actual_data{$eo} = <IN>;
+              close IN
+                or (warn "$program_name: failed to read $out_file: $!\n"),
+                  $fail = 1;
+            }
+        }
+
+      foreach my $eo (qw (OUT ERR))
+        {
+          my $subst_expr = $expect->{RESULT_SUBST}->{$eo};
+          if (defined $subst_expr)
+            {
+              my $out = $actual{$eo};
+              my $orig = "$out.orig";
+
+              # Move $out aside (to $orig), then recreate $out
+              # by transforming each line of $orig via $subst_expr.
+              rename $out, $orig
+                or (warn "$program_name: cannot rename $out to $orig: $!\n"),
+                  $fail = 1, next;
+              open IN, $orig
+                or (warn "$program_name: cannot open $orig for reading: $!\n"),
+                  $fail = 1, (unlink $orig), next;
+              unlink $orig
+                or (warn "$program_name: cannot unlink $orig: $!\n"),
+                  $fail = 1;
+              open OUT, ">$out"
+                or (warn "$program_name: cannot open $out for writing: $!\n"),
+                  $fail = 1, next;
+              while (defined (my $line = <IN>))
+                {
+                  eval "\$_ = \$line; $subst_expr; \$line = \$_";
+                  print OUT $line;
+                }
+              close IN;
+              close OUT
+                or (warn "$program_name: failed to write $out: $!\n"),
+                  $fail = 1, next;
+            }
+
+          my $eo_lower = lc $eo;
+          _compare_files ($program_name, $test_name, $eo_lower,
+                          $actual{$eo}, $expect->{$eo})
+            and $fail = 1;
+        }
+
+      foreach my $pair (@post_compare)
+        {
+          my ($expected, $actual) = @$pair;
+          _compare_files $program_name, $test_name, undef, $actual, $expected
+            and $fail = 1;
+        }
+
+    cleanup:
+      $expect->{POST}
+        and &{$expect->{POST}} ($actual_data{OUT}, $actual_data{ERR});
+
+    }
+
+  # FIXME: maybe unlink files inside the big foreach loop?
+  unlink @junk_files if ! $save_temps;
+
+  return $fail;
+}
+
+# For each test in @$TESTS, generate two additional tests,
+# one using stdin, the other using a pipe.  I.e., given this one
+# ['idem-0', {IN=>''}, {OUT=>''}],
+# generate these:
+# ['idem-0.r', '<', {IN=>''}, {OUT=>''}],
+# ['idem-0.p', {IN_PIPE=>''}, {OUT=>''}],
+# Generate new tests only if there is exactly one input spec.
+# The returned list of tests contains each input test, followed
+# by zero or two derived tests.
+sub triple_test($)
+{
+  my ($tests) = @_;
+  my @new;
+  foreach my $t (@$tests)
+    {
+      push @new, $t;
+
+      my @in;
+      my @args;
+      my @list_of_hash;
+      foreach my $e (@$t)
+        {
+          !ref $e
+            and push (@args, $e), next;
+
+          ref $e && ref $e eq 'HASH'
+            or (warn "$0: $t->[0]: unexpected entry type\n"), next;
+          defined $e->{IN}
+            and (push @in, $e->{IN}), next;
+          push @list_of_hash, $e;
+        }
+      # Add variants IFF there is exactly one input file.
+      @in == 1
+        or next;
+      shift @args; # discard test name
+      push @new, ["$t->[0].r", @args, '<', {IN => $in[0]}, @list_of_hash];
+      push @new, ["$t->[0].p", @args, {IN_PIPE => $in[0]}, @list_of_hash];
+    }
+  return @new;
+}
+
+## package return
+1;
diff --git a/src/grep/tests/CuSkip.pm b/src/grep/tests/CuSkip.pm
new file mode 100644
index 0000000..f5fd9f1
--- /dev/null
+++ b/src/grep/tests/CuSkip.pm
@@ -0,0 +1,39 @@
+package CuSkip;
+# Skip a test: emit diag to log and to stderr, and exit 77
+
+# Copyright (C) 2011-2015, 2017-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+use strict;
+use warnings;
+
+our $ME = $0 || "<???>";
+
+# Emit a diagnostic both to stderr and to $stderr_fileno_.
+# FIXME: don't hard-code that value (9), since it's already defined in init.cfg.
+sub skip ($)
+{
+  my ($msg) = @_;
+  my $stderr_fileno_ = 9;
+  warn $msg;
+  open FH, ">&$stderr_fileno_"
+    or warn "$ME: failed to dup stderr\n";
+  print FH $msg;
+  close FH
+    or warn "$ME: failed to close FD $stderr_fileno_\n";
+  exit 77;
+}
+
+1;
diff --git a/src/grep/tests/CuTmpdir.pm b/src/grep/tests/CuTmpdir.pm
new file mode 100644
index 0000000..93ecd9b
--- /dev/null
+++ b/src/grep/tests/CuTmpdir.pm
@@ -0,0 +1,111 @@
+package CuTmpdir;
+# create, then chdir into a temporary sub-directory
+
+# Copyright (C) 2007-2015, 2017-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+use strict;
+use warnings;
+
+use File::Temp;
+use File::Find;
+
+our $ME = $0 || "<???>";
+
+my $dir;
+
+sub skip_test($)
+{
+  warn "$ME: skipping test: unsafe working directory name: '$_[0]'\n";
+  exit 77;
+}
+
+sub chmod_1
+{
+  my $name = $_;
+
+  # Skip symlinks and non-directories.
+  -l $name || !-d _
+    and return;
+
+  chmod 0700, $name;
+}
+
+sub chmod_tree
+{
+  # When tempdir fails, it croaks, which leaves $dir undefined.
+  defined $dir
+    or return;
+
+  # Perform the equivalent of find "$dir" -type d -print0|xargs -0 chmod -R 700.
+  my $options = {untaint => 1, wanted => \&chmod_1};
+  find ($options, $dir);
+}
+
+sub import {
+  my $prefix = $_[1];
+
+  $ME eq '-' && defined $prefix
+    and $ME = $prefix;
+
+  if ($prefix !~ /^\//)
+    {
+      eval 'use Cwd';
+      my $cwd = $@ ? '.' : Cwd::getcwd();
+      $prefix = "$cwd/$prefix";
+    }
+
+  # Untaint for the upcoming mkdir.
+  $prefix =~ m!^([-+\@\w./]+)$!
+    or skip_test $prefix;
+  $prefix = $1;
+
+  my $original_pid = $$;
+
+  my $on_sig_remove_tmpdir = sub {
+    my ($sig) = @_;
+    if ($$ == $original_pid and defined $dir)
+      {
+        chmod_tree;
+        # Older versions of File::Temp lack this method.
+        exists &File::Temp::cleanup
+          and &File::Temp::cleanup;
+      }
+    $SIG{$sig} = 'DEFAULT';
+    kill $sig, $$;
+  };
+
+  foreach my $sig (qw (INT TERM HUP))
+    {
+      $SIG{$sig} = $on_sig_remove_tmpdir;
+    }
+
+  $dir = File::Temp::tempdir("$prefix.tmp-XXXX", CLEANUP => 1 );
+  chdir $dir
+    or warn "$ME: failed to chdir to $dir: $!\n";
+}
+
+END {
+  # Move cwd out of the directory we're about to remove.
+  # This is required on some systems, and by some versions of File::Temp.
+  chdir '..'
+    or warn "$ME: failed to chdir to .. from $dir: $!\n";
+
+  my $saved_errno = $?;
+  chmod_tree;
+  $? = $saved_errno;
+}
+
+1;
diff --git a/src/grep/tests/Makefile.am b/src/grep/tests/Makefile.am
new file mode 100644
index 0000000..c84cdc0
--- /dev/null
+++ b/src/grep/tests/Makefile.am
@@ -0,0 +1,279 @@
+## Process this file with automake to create Makefile.in
+# Copyright 1997-1998, 2005-2021 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+TEST_EXTENSIONS = .sh .pl
+
+if HAVE_PERL
+TESTSUITE_PERL = $(PERL)
+else
+TESTSUITE_PERL = $(SHELL) $(srcdir)/no-perl
+endif
+
+# Options passed to the perl invocations running the perl test scripts.
+TESTSUITE_PERL_OPTIONS = -w -I$(srcdir) -MCoreutils -MCuSkip
+# '$f' is set by the Automake-generated test harness to the path of the
+# current test script stripped of VPATH components, and is used by the
+# CuTmpdir module to determine the name of the temporary files to be
+# used.  Note that $f is a shell variable, not a make macro, so the use
+# of '$$f' below is correct, and not a typo.
+TESTSUITE_PERL_OPTIONS += -M"CuTmpdir qw($$f)"
+
+SH_LOG_COMPILER = $(SHELL)
+PL_LOG_COMPILER = $(TESTSUITE_PERL) $(TESTSUITE_PERL_OPTIONS)
+
+check_PROGRAMS = get-mb-cur-max
+AM_CPPFLAGS = -I$(top_builddir)/lib -I$(top_srcdir)/lib \
+  -I$(top_srcdir)/src
+AM_CFLAGS = $(WARN_CFLAGS) $(WERROR_CFLAGS)
+
+# Tell the linker to omit references to unused shared libraries.
+AM_LDFLAGS = $(IGNORE_UNUSED_LIBRARIES_CFLAGS)
+LDADD = ../lib/libgreputils.a $(LIBINTL) ../lib/libgreputils.a
+
+# The triple-backref test is expected to fail with both the system
+# matcher (i.e., with glibc) and with the included matcher.
+# Both matchers need to be fixed.
+# FIXME-2015: Remove this once the glibc and gnulib bugs are fixed.
+XFAIL_TESTS = triple-backref
+
+# Equivalence classes are only supported when using the system
+# matcher (which means only with glibc).
+# The included matcher needs to be fixed.
+# FIXME-2015: Remove this once the gnulib bug is fixed.
+if USE_INCLUDED_REGEX
+XFAIL_TESTS += equiv-classes
+else
+# The backref-alt test fails for glibc 2.27 and earlier.
+# If you're using older glibc you can upgrade to glibc 2.28 or later,
+# configure --with-included-regex, or ignore the test failure.
+endif
+
+TESTS =						\
+  backref					\
+  backref-alt					\
+  backref-multibyte-slow			\
+  backref-word					\
+  backslash-dot					\
+  backslash-s-and-repetition-operators		\
+  backslash-s-vs-invalid-multibyte		\
+  big-hole					\
+  big-match					\
+  binary-file-matches				\
+  bogus-wctob					\
+  bre						\
+  c-locale					\
+  case-fold-backref				\
+  case-fold-backslash-w				\
+  case-fold-char-class				\
+  case-fold-char-range				\
+  case-fold-char-type				\
+  case-fold-titlecase				\
+  char-class-multibyte				\
+  char-class-multibyte2				\
+  context-0					\
+  count-newline					\
+  dfa-coverage					\
+  dfa-heap-overrun				\
+  dfa-infloop					\
+  dfa-invalid-utf8				\
+  dfaexec-multibyte				\
+  empty						\
+  empty-line					\
+  empty-line-mb					\
+  encoding-error				\
+  epipe						\
+  equiv-classes					\
+  ere						\
+  euc-mb					\
+  false-match-mb-non-utf8			\
+  fedora					\
+  fgrep-infloop					\
+  fgrep-longest					\
+  file						\
+  filename-lineno.pl				\
+  fmbtest					\
+  foad1						\
+  grep-dev-null					\
+  grep-dev-null-out				\
+  grep-dir					\
+  hash-collision-perf				\
+  help-version					\
+  high-bit-range				\
+  in-eq-out-infloop				\
+  include-exclude				\
+  inconsistent-range				\
+  initial-tab					\
+  invalid-multibyte-infloop			\
+  khadafy					\
+  kwset-abuse					\
+  long-line-vs-2GiB-read			\
+  long-pattern-perf				\
+  many-regex-performance			\
+  match-lines					\
+  max-count-overread				\
+  max-count-vs-context				\
+  mb-dot-newline				\
+  mb-non-UTF8-overrun				\
+  mb-non-UTF8-perf-Fw				\
+  mb-non-UTF8-performance			\
+  mb-non-UTF8-word-boundary			\
+  multibyte-white-space				\
+  multiple-begin-or-end-line			\
+  null-byte					\
+  options					\
+  pcre						\
+  pcre-abort					\
+  pcre-context					\
+  pcre-count					\
+  pcre-infloop					\
+  pcre-invalid-utf8-infloop			\
+  pcre-invalid-utf8-input			\
+  pcre-jitstack					\
+  pcre-o					\
+  pcre-utf8					\
+  pcre-w					\
+  pcre-wx-backref				\
+  pcre-z					\
+  posix-bracket					\
+  prefix-of-multibyte				\
+  proc						\
+  r-dot						\
+  repetition-overflow				\
+  reversed-range-endpoints			\
+  sjis-mb					\
+  skip-device					\
+  skip-read					\
+  spencer1					\
+  spencer1-locale				\
+  stack-overflow				\
+  status					\
+  surrogate-pair				\
+  symlink					\
+  triple-backref				\
+  turkish-I					\
+  turkish-I-without-dot				\
+  turkish-eyes					\
+  two-chars					\
+  two-files					\
+  unibyte-binary				\
+  unibyte-bracket-expr				\
+  unibyte-negated-circumflex			\
+  utf8-bracket					\
+  warn-char-classes				\
+  word-delim-multibyte				\
+  word-multi-file				\
+  word-multibyte				\
+  write-error-msg				\
+  yesno						\
+  z-anchor-newline
+
+EXTRA_DIST =					\
+  $(TESTS)					\
+  bre.awk					\
+  bre.tests					\
+  Coreutils.pm					\
+  CuSkip.pm					\
+  CuTmpdir.pm					\
+  envvar-check					\
+  ere.awk					\
+  ere.tests					\
+  init.cfg					\
+  init.sh					\
+  khadafy.lines					\
+  khadafy.regexp				\
+  no-perl					\
+  spencer1.awk					\
+  spencer1.tests				\
+  spencer1-locale.awk
+
+# Default to a nonzero value.  Environment overrides.
+# https://udrepper.livejournal.com/11429.html
+MALLOC_PERTURB_ = 1
+
+TESTS_ENVIRONMENT =				\
+  tmp__=$${TMPDIR-/tmp};			\
+  test -d "$$tmp__" && test -w "$$tmp__" || tmp__=.;	\
+  . $(srcdir)/envvar-check;			\
+  TMPDIR=$$tmp__; export TMPDIR;		\
+						\
+  if test -n "$$BASH_VERSION" || (eval "export v=x") 2>/dev/null; then \
+    export_with_values () { export "$$@"; };		\
+  else							\
+    export_with_values ()				\
+    {							\
+      sed_extract_var='s/=.*//';			\
+      sed_quote_value="s/'/'\\\\''/g;s/=\\(.*\\)/='\\1'/";\
+      for arg in "$$@"; do				\
+        var=`echo "$$arg" | sed "$$sed_extract_var"`;	\
+        arg=`echo "$$arg" | sed "$$sed_quote_value"`;	\
+        eval "$$arg";					\
+        export "$$var";					\
+      done;						\
+    };							\
+  fi;							\
+							\
+  : 'Test egrep/fgrep help if they use our grep.';	\
+  grep=`echo grep | sed -e '$(transform)'` || exit;	\
+  if test "$$grep" = grep; then				\
+    built_programs='grep egrep fgrep';			\
+  else							\
+    built_programs='grep';				\
+  fi;							\
+						\
+  export_with_values				\
+  VERSION='$(VERSION)'				\
+  LOCALE_FR='$(LOCALE_FR)'			\
+  LOCALE_FR_UTF8='$(LOCALE_FR_UTF8)'		\
+  AWK=$(AWK)					\
+  LC_ALL=C					\
+  abs_top_builddir='$(abs_top_builddir)'	\
+  abs_top_srcdir='$(abs_top_srcdir)'		\
+  abs_srcdir='$(abs_srcdir)'			\
+  built_programs="$$built_programs"		\
+  host_triplet='$(host_triplet)'		\
+  srcdir='$(srcdir)'				\
+  top_srcdir='$(top_srcdir)'			\
+  CC='$(CC)'					\
+  GREP_TEST_NAME=`echo $$tst|sed 's,^\./,,;s,/,-,g'` \
+  MAKE=$(MAKE)					\
+  MALLOC_PERTURB_=$(MALLOC_PERTURB_)		\
+  PACKAGE_BUGREPORT='$(PACKAGE_BUGREPORT)'	\
+  PACKAGE_VERSION=$(PACKAGE_VERSION)		\
+  PERL='$(PERL)'				\
+  SHELL='$(SHELL)'				\
+  PATH='$(abs_top_builddir)/src$(PATH_SEPARATOR)'"$$PATH" \
+  ;						\
+						\
+  : 'set this envvar to indicate whether -P works';	\
+  m=0; if err=`echo .|grep -Pq . 2>&1`; then		\
+    test -z "$$err" && m=1; fi;				\
+  export PCRE_WORKS=$$m;				\
+  9>&2
+
+LOG_COMPILER = $(SHELL)
+
+VERBOSE = yes
+
+check: check_executable_TESTS
+.PHONY: check_executable_TESTS
+check_executable_TESTS: Makefile
+	$(AM_V_GEN)fail=0;						\
+        cd $(srcdir) && for i in $(TESTS); do				\
+	  test -x $$i || { fail=1; echo $$i >&2; };			\
+	done;								\
+	test $$fail = 1							\
+          && { echo the above test scripts are not executable >&2; exit 1; } \
+          || :
diff --git a/src/grep/tests/Makefile.in b/src/grep/tests/Makefile.in
new file mode 100644
index 0000000..bc124db
--- /dev/null
+++ b/src/grep/tests/Makefile.in
@@ -0,0 +1,3299 @@
+# Makefile.in generated by automake 1.16d from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+# Copyright 1997-1998, 2005-2021 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+VPATH = @srcdir@
+am__is_gnu_make = { \
+  if test -z '$(MAKELEVEL)'; then \
+    false; \
+  elif test -n '$(MAKE_HOST)'; then \
+    true; \
+  elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+    true; \
+  else \
+    false; \
+  fi; \
+}
+am__make_running_with_option = \
+  case $${target_option-} in \
+      ?) ;; \
+      *) echo "am__make_running_with_option: internal error: invalid" \
+              "target option '$${target_option-}' specified" >&2; \
+         exit 1;; \
+  esac; \
+  has_opt=no; \
+  sane_makeflags=$$MAKEFLAGS; \
+  if $(am__is_gnu_make); then \
+    sane_makeflags=$$MFLAGS; \
+  else \
+    case $$MAKEFLAGS in \
+      *\\[\ \	]*) \
+        bs=\\; \
+        sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \
+          | sed "s/$$bs$$bs[$$bs $$bs	]*//g"`;; \
+    esac; \
+  fi; \
+  skip_next=no; \
+  strip_trailopt () \
+  { \
+    flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \
+  }; \
+  for flg in $$sane_makeflags; do \
+    test $$skip_next = yes && { skip_next=no; continue; }; \
+    case $$flg in \
+      *=*|--*) continue;; \
+        -*I) strip_trailopt 'I'; skip_next=yes;; \
+      -*I?*) strip_trailopt 'I';; \
+        -*O) strip_trailopt 'O'; skip_next=yes;; \
+      -*O?*) strip_trailopt 'O';; \
+        -*l) strip_trailopt 'l'; skip_next=yes;; \
+      -*l?*) strip_trailopt 'l';; \
+      -[dEDm]) skip_next=yes;; \
+      -[JT]) skip_next=yes;; \
+    esac; \
+    case $$flg in \
+      *$$target_option*) has_opt=yes; break;; \
+    esac; \
+  done; \
+  test $$has_opt = yes
+am__make_dryrun = (target_option=n; $(am__make_running_with_option))
+am__make_keepgoing = (target_option=k; $(am__make_running_with_option))
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+check_PROGRAMS = get-mb-cur-max$(EXEEXT)
+
+# Equivalence classes are only supported when using the system
+# matcher (which means only with glibc).
+# The included matcher needs to be fixed.
+# FIXME-2015: Remove this once the gnulib bug is fixed.
+@USE_INCLUDED_REGEX_TRUE@am__append_1 = equiv-classes
+subdir = tests
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/m4/00gnulib.m4 \
+	$(top_srcdir)/m4/__inline.m4 \
+	$(top_srcdir)/m4/absolute-header.m4 $(top_srcdir)/m4/alloca.m4 \
+	$(top_srcdir)/m4/arpa_inet_h.m4 \
+	$(top_srcdir)/m4/asm-underscore.m4 $(top_srcdir)/m4/assert.m4 \
+	$(top_srcdir)/m4/btowc.m4 $(top_srcdir)/m4/builtin-expect.m4 \
+	$(top_srcdir)/m4/c-stack.m4 $(top_srcdir)/m4/calloc.m4 \
+	$(top_srcdir)/m4/chdir-long.m4 $(top_srcdir)/m4/close.m4 \
+	$(top_srcdir)/m4/closedir.m4 $(top_srcdir)/m4/codeset.m4 \
+	$(top_srcdir)/m4/configmake.m4 $(top_srcdir)/m4/ctype_h.m4 \
+	$(top_srcdir)/m4/cycle-check.m4 $(top_srcdir)/m4/d-ino.m4 \
+	$(top_srcdir)/m4/d-type.m4 $(top_srcdir)/m4/dirent_h.m4 \
+	$(top_srcdir)/m4/dirfd.m4 \
+	$(top_srcdir)/m4/double-slash-root.m4 $(top_srcdir)/m4/dup.m4 \
+	$(top_srcdir)/m4/dup2.m4 $(top_srcdir)/m4/eealloc.m4 \
+	$(top_srcdir)/m4/environ.m4 $(top_srcdir)/m4/errno_h.m4 \
+	$(top_srcdir)/m4/error.m4 $(top_srcdir)/m4/exponentd.m4 \
+	$(top_srcdir)/m4/extensions.m4 \
+	$(top_srcdir)/m4/extern-inline.m4 $(top_srcdir)/m4/fchdir.m4 \
+	$(top_srcdir)/m4/fcntl-o.m4 $(top_srcdir)/m4/fcntl-safer.m4 \
+	$(top_srcdir)/m4/fcntl.m4 $(top_srcdir)/m4/fcntl_h.m4 \
+	$(top_srcdir)/m4/fdopen.m4 $(top_srcdir)/m4/fdopendir.m4 \
+	$(top_srcdir)/m4/filenamecat.m4 $(top_srcdir)/m4/flexmember.m4 \
+	$(top_srcdir)/m4/float_h.m4 $(top_srcdir)/m4/fnmatch.m4 \
+	$(top_srcdir)/m4/fnmatch_h.m4 $(top_srcdir)/m4/fopen.m4 \
+	$(top_srcdir)/m4/fpending.m4 $(top_srcdir)/m4/fpieee.m4 \
+	$(top_srcdir)/m4/free.m4 $(top_srcdir)/m4/fstat.m4 \
+	$(top_srcdir)/m4/fstatat.m4 $(top_srcdir)/m4/ftruncate.m4 \
+	$(top_srcdir)/m4/fts.m4 $(top_srcdir)/m4/getcwd.m4 \
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+am__DIST_COMMON = $(srcdir)/Makefile.in \
+	$(top_srcdir)/build-aux/depcomp \
+	$(top_srcdir)/build-aux/test-driver
+DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
+pkglibexecdir = @pkglibexecdir@
+ACLOCAL = @ACLOCAL@
+ALLOCA = @ALLOCA@
+ALLOCA_H = @ALLOCA_H@
+AMTAR = @AMTAR@
+AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
+APPLE_UNIVERSAL_BUILD = @APPLE_UNIVERSAL_BUILD@
+AR = @AR@
+ARFLAGS = @ARFLAGS@
+AUTOCONF = @AUTOCONF@
+AUTOHEADER = @AUTOHEADER@
+AUTOMAKE = @AUTOMAKE@
+AWK = @AWK@
+BITSIZEOF_PTRDIFF_T = @BITSIZEOF_PTRDIFF_T@
+BITSIZEOF_SIG_ATOMIC_T = @BITSIZEOF_SIG_ATOMIC_T@
+BITSIZEOF_SIZE_T = @BITSIZEOF_SIZE_T@
+BITSIZEOF_WCHAR_T = @BITSIZEOF_WCHAR_T@
+BITSIZEOF_WINT_T = @BITSIZEOF_WINT_T@
+CC = @CC@
+CCDEPMODE = @CCDEPMODE@
+CFLAGS = @CFLAGS@
+CFLAG_VISIBILITY = @CFLAG_VISIBILITY@
+COLORIZE_SOURCE = @COLORIZE_SOURCE@
+CONFIG_INCLUDE = @CONFIG_INCLUDE@
+CPP = @CPP@
+CPPFLAGS = @CPPFLAGS@
+CSCOPE = @CSCOPE@
+CTAGS = @CTAGS@
+CYGPATH_W = @CYGPATH_W@
+DEFS = @DEFS@
+DEPDIR = @DEPDIR@
+ECHO_C = @ECHO_C@
+ECHO_N = @ECHO_N@
+ECHO_T = @ECHO_T@
+EGREP = @EGREP@
+EMULTIHOP_HIDDEN = @EMULTIHOP_HIDDEN@
+EMULTIHOP_VALUE = @EMULTIHOP_VALUE@
+ENOLINK_HIDDEN = @ENOLINK_HIDDEN@
+ENOLINK_VALUE = @ENOLINK_VALUE@
+EOVERFLOW_HIDDEN = @EOVERFLOW_HIDDEN@
+EOVERFLOW_VALUE = @EOVERFLOW_VALUE@
+ERRNO_H = @ERRNO_H@
+ETAGS = @ETAGS@
+EXEEXT = @EXEEXT@
+FLOAT_H = @FLOAT_H@
+FNMATCH_H = @FNMATCH_H@
+GETOPT_CDEFS_H = @GETOPT_CDEFS_H@
+GETOPT_H = @GETOPT_H@
+GETTEXT_MACRO_VERSION = @GETTEXT_MACRO_VERSION@
+GL_CFLAG_ALLOW_WARNINGS = @GL_CFLAG_ALLOW_WARNINGS@
+GL_CXXFLAG_ALLOW_WARNINGS = @GL_CXXFLAG_ALLOW_WARNINGS@
+GL_GNULIB_ACCEPT = @GL_GNULIB_ACCEPT@
+GL_GNULIB_ACCEPT4 = @GL_GNULIB_ACCEPT4@
+GL_GNULIB_ACCESS = @GL_GNULIB_ACCESS@
+GL_GNULIB_ALIGNED_ALLOC = @GL_GNULIB_ALIGNED_ALLOC@
+GL_GNULIB_ALPHASORT = @GL_GNULIB_ALPHASORT@
+GL_GNULIB_ATOLL = @GL_GNULIB_ATOLL@
+GL_GNULIB_BIND = @GL_GNULIB_BIND@
+GL_GNULIB_BTOWC = @GL_GNULIB_BTOWC@
+GL_GNULIB_CALLOC_POSIX = @GL_GNULIB_CALLOC_POSIX@
+GL_GNULIB_CANONICALIZE_FILE_NAME = @GL_GNULIB_CANONICALIZE_FILE_NAME@
+GL_GNULIB_CHDIR = @GL_GNULIB_CHDIR@
+GL_GNULIB_CHOWN = @GL_GNULIB_CHOWN@
+GL_GNULIB_CLOSE = @GL_GNULIB_CLOSE@
+GL_GNULIB_CLOSEDIR = @GL_GNULIB_CLOSEDIR@
+GL_GNULIB_CONNECT = @GL_GNULIB_CONNECT@
+GL_GNULIB_COPY_FILE_RANGE = @GL_GNULIB_COPY_FILE_RANGE@
+GL_GNULIB_CREAT = @GL_GNULIB_CREAT@
+GL_GNULIB_CTIME = @GL_GNULIB_CTIME@
+GL_GNULIB_DIRFD = @GL_GNULIB_DIRFD@
+GL_GNULIB_DPRINTF = @GL_GNULIB_DPRINTF@
+GL_GNULIB_DUP = @GL_GNULIB_DUP@
+GL_GNULIB_DUP2 = @GL_GNULIB_DUP2@
+GL_GNULIB_DUP3 = @GL_GNULIB_DUP3@
+GL_GNULIB_DUPLOCALE = @GL_GNULIB_DUPLOCALE@
+GL_GNULIB_ENVIRON = @GL_GNULIB_ENVIRON@
+GL_GNULIB_EUIDACCESS = @GL_GNULIB_EUIDACCESS@
+GL_GNULIB_EXECL = @GL_GNULIB_EXECL@
+GL_GNULIB_EXECLE = @GL_GNULIB_EXECLE@
+GL_GNULIB_EXECLP = @GL_GNULIB_EXECLP@
+GL_GNULIB_EXECV = @GL_GNULIB_EXECV@
+GL_GNULIB_EXECVE = @GL_GNULIB_EXECVE@
+GL_GNULIB_EXECVP = @GL_GNULIB_EXECVP@
+GL_GNULIB_EXECVPE = @GL_GNULIB_EXECVPE@
+GL_GNULIB_EXPLICIT_BZERO = @GL_GNULIB_EXPLICIT_BZERO@
+GL_GNULIB_FACCESSAT = @GL_GNULIB_FACCESSAT@
+GL_GNULIB_FCHDIR = @GL_GNULIB_FCHDIR@
+GL_GNULIB_FCHMODAT = @GL_GNULIB_FCHMODAT@
+GL_GNULIB_FCHOWNAT = @GL_GNULIB_FCHOWNAT@
+GL_GNULIB_FCLOSE = @GL_GNULIB_FCLOSE@
+GL_GNULIB_FCNTL = @GL_GNULIB_FCNTL@
+GL_GNULIB_FDATASYNC = @GL_GNULIB_FDATASYNC@
+GL_GNULIB_FDOPEN = @GL_GNULIB_FDOPEN@
+GL_GNULIB_FDOPENDIR = @GL_GNULIB_FDOPENDIR@
+GL_GNULIB_FFLUSH = @GL_GNULIB_FFLUSH@
+GL_GNULIB_FFSL = @GL_GNULIB_FFSL@
+GL_GNULIB_FFSLL = @GL_GNULIB_FFSLL@
+GL_GNULIB_FGETC = @GL_GNULIB_FGETC@
+GL_GNULIB_FGETS = @GL_GNULIB_FGETS@
+GL_GNULIB_FNMATCH = @GL_GNULIB_FNMATCH@
+GL_GNULIB_FOPEN = @GL_GNULIB_FOPEN@
+GL_GNULIB_FPRINTF = @GL_GNULIB_FPRINTF@
+GL_GNULIB_FPRINTF_POSIX = @GL_GNULIB_FPRINTF_POSIX@
+GL_GNULIB_FPURGE = @GL_GNULIB_FPURGE@
+GL_GNULIB_FPUTC = @GL_GNULIB_FPUTC@
+GL_GNULIB_FPUTS = @GL_GNULIB_FPUTS@
+GL_GNULIB_FREAD = @GL_GNULIB_FREAD@
+GL_GNULIB_FREE_POSIX = @GL_GNULIB_FREE_POSIX@
+GL_GNULIB_FREOPEN = @GL_GNULIB_FREOPEN@
+GL_GNULIB_FSCANF = @GL_GNULIB_FSCANF@
+GL_GNULIB_FSEEK = @GL_GNULIB_FSEEK@
+GL_GNULIB_FSEEKO = @GL_GNULIB_FSEEKO@
+GL_GNULIB_FSTAT = @GL_GNULIB_FSTAT@
+GL_GNULIB_FSTATAT = @GL_GNULIB_FSTATAT@
+GL_GNULIB_FSYNC = @GL_GNULIB_FSYNC@
+GL_GNULIB_FTELL = @GL_GNULIB_FTELL@
+GL_GNULIB_FTELLO = @GL_GNULIB_FTELLO@
+GL_GNULIB_FTRUNCATE = @GL_GNULIB_FTRUNCATE@
+GL_GNULIB_FUTIMENS = @GL_GNULIB_FUTIMENS@
+GL_GNULIB_FWRITE = @GL_GNULIB_FWRITE@
+GL_GNULIB_GETC = @GL_GNULIB_GETC@
+GL_GNULIB_GETCHAR = @GL_GNULIB_GETCHAR@
+GL_GNULIB_GETCWD = @GL_GNULIB_GETCWD@
+GL_GNULIB_GETDELIM = @GL_GNULIB_GETDELIM@
+GL_GNULIB_GETDOMAINNAME = @GL_GNULIB_GETDOMAINNAME@
+GL_GNULIB_GETDTABLESIZE = @GL_GNULIB_GETDTABLESIZE@
+GL_GNULIB_GETENTROPY = @GL_GNULIB_GETENTROPY@
+GL_GNULIB_GETGROUPS = @GL_GNULIB_GETGROUPS@
+GL_GNULIB_GETHOSTNAME = @GL_GNULIB_GETHOSTNAME@
+GL_GNULIB_GETLINE = @GL_GNULIB_GETLINE@
+GL_GNULIB_GETLOADAVG = @GL_GNULIB_GETLOADAVG@
+GL_GNULIB_GETLOGIN = @GL_GNULIB_GETLOGIN@
+GL_GNULIB_GETLOGIN_R = @GL_GNULIB_GETLOGIN_R@
+GL_GNULIB_GETOPT_POSIX = @GL_GNULIB_GETOPT_POSIX@
+GL_GNULIB_GETPAGESIZE = @GL_GNULIB_GETPAGESIZE@
+GL_GNULIB_GETPASS = @GL_GNULIB_GETPASS@
+GL_GNULIB_GETPEERNAME = @GL_GNULIB_GETPEERNAME@
+GL_GNULIB_GETSOCKNAME = @GL_GNULIB_GETSOCKNAME@
+GL_GNULIB_GETSOCKOPT = @GL_GNULIB_GETSOCKOPT@
+GL_GNULIB_GETSUBOPT = @GL_GNULIB_GETSUBOPT@
+GL_GNULIB_GETTIMEOFDAY = @GL_GNULIB_GETTIMEOFDAY@
+GL_GNULIB_GETUMASK = @GL_GNULIB_GETUMASK@
+GL_GNULIB_GETUSERSHELL = @GL_GNULIB_GETUSERSHELL@
+GL_GNULIB_GRANTPT = @GL_GNULIB_GRANTPT@
+GL_GNULIB_GROUP_MEMBER = @GL_GNULIB_GROUP_MEMBER@
+GL_GNULIB_ICONV = @GL_GNULIB_ICONV@
+GL_GNULIB_IMAXABS = @GL_GNULIB_IMAXABS@
+GL_GNULIB_IMAXDIV = @GL_GNULIB_IMAXDIV@
+GL_GNULIB_INET_NTOP = @GL_GNULIB_INET_NTOP@
+GL_GNULIB_INET_PTON = @GL_GNULIB_INET_PTON@
+GL_GNULIB_IOCTL = @GL_GNULIB_IOCTL@
+GL_GNULIB_ISATTY = @GL_GNULIB_ISATTY@
+GL_GNULIB_ISBLANK = @GL_GNULIB_ISBLANK@
+GL_GNULIB_ISWBLANK = @GL_GNULIB_ISWBLANK@
+GL_GNULIB_ISWCTYPE = @GL_GNULIB_ISWCTYPE@
+GL_GNULIB_ISWDIGIT = @GL_GNULIB_ISWDIGIT@
+GL_GNULIB_ISWXDIGIT = @GL_GNULIB_ISWXDIGIT@
+GL_GNULIB_LCHMOD = @GL_GNULIB_LCHMOD@
+GL_GNULIB_LCHOWN = @GL_GNULIB_LCHOWN@
+GL_GNULIB_LINK = @GL_GNULIB_LINK@
+GL_GNULIB_LINKAT = @GL_GNULIB_LINKAT@
+GL_GNULIB_LISTEN = @GL_GNULIB_LISTEN@
+GL_GNULIB_LOCALECONV = @GL_GNULIB_LOCALECONV@
+GL_GNULIB_LOCALENAME = @GL_GNULIB_LOCALENAME@
+GL_GNULIB_LOCALTIME = @GL_GNULIB_LOCALTIME@
+GL_GNULIB_LSEEK = @GL_GNULIB_LSEEK@
+GL_GNULIB_LSTAT = @GL_GNULIB_LSTAT@
+GL_GNULIB_MALLOC_POSIX = @GL_GNULIB_MALLOC_POSIX@
+GL_GNULIB_MBRLEN = @GL_GNULIB_MBRLEN@
+GL_GNULIB_MBRTOWC = @GL_GNULIB_MBRTOWC@
+GL_GNULIB_MBSCASECMP = @GL_GNULIB_MBSCASECMP@
+GL_GNULIB_MBSCASESTR = @GL_GNULIB_MBSCASESTR@
+GL_GNULIB_MBSCHR = @GL_GNULIB_MBSCHR@
+GL_GNULIB_MBSCSPN = @GL_GNULIB_MBSCSPN@
+GL_GNULIB_MBSINIT = @GL_GNULIB_MBSINIT@
+GL_GNULIB_MBSLEN = @GL_GNULIB_MBSLEN@
+GL_GNULIB_MBSNCASECMP = @GL_GNULIB_MBSNCASECMP@
+GL_GNULIB_MBSNLEN = @GL_GNULIB_MBSNLEN@
+GL_GNULIB_MBSNRTOWCS = @GL_GNULIB_MBSNRTOWCS@
+GL_GNULIB_MBSPBRK = @GL_GNULIB_MBSPBRK@
+GL_GNULIB_MBSPCASECMP = @GL_GNULIB_MBSPCASECMP@
+GL_GNULIB_MBSRCHR = @GL_GNULIB_MBSRCHR@
+GL_GNULIB_MBSRTOWCS = @GL_GNULIB_MBSRTOWCS@
+GL_GNULIB_MBSSEP = @GL_GNULIB_MBSSEP@
+GL_GNULIB_MBSSPN = @GL_GNULIB_MBSSPN@
+GL_GNULIB_MBSSTR = @GL_GNULIB_MBSSTR@
+GL_GNULIB_MBSTOK_R = @GL_GNULIB_MBSTOK_R@
+GL_GNULIB_MBTOWC = @GL_GNULIB_MBTOWC@
+GL_GNULIB_MDA_ACCESS = @GL_GNULIB_MDA_ACCESS@
+GL_GNULIB_MDA_CHDIR = @GL_GNULIB_MDA_CHDIR@
+GL_GNULIB_MDA_CHMOD = @GL_GNULIB_MDA_CHMOD@
+GL_GNULIB_MDA_CLOSE = @GL_GNULIB_MDA_CLOSE@
+GL_GNULIB_MDA_CREAT = @GL_GNULIB_MDA_CREAT@
+GL_GNULIB_MDA_DUP = @GL_GNULIB_MDA_DUP@
+GL_GNULIB_MDA_DUP2 = @GL_GNULIB_MDA_DUP2@
+GL_GNULIB_MDA_ECVT = @GL_GNULIB_MDA_ECVT@
+GL_GNULIB_MDA_EXECL = @GL_GNULIB_MDA_EXECL@
+GL_GNULIB_MDA_EXECLE = @GL_GNULIB_MDA_EXECLE@
+GL_GNULIB_MDA_EXECLP = @GL_GNULIB_MDA_EXECLP@
+GL_GNULIB_MDA_EXECV = @GL_GNULIB_MDA_EXECV@
+GL_GNULIB_MDA_EXECVE = @GL_GNULIB_MDA_EXECVE@
+GL_GNULIB_MDA_EXECVP = @GL_GNULIB_MDA_EXECVP@
+GL_GNULIB_MDA_EXECVPE = @GL_GNULIB_MDA_EXECVPE@
+GL_GNULIB_MDA_FCLOSEALL = @GL_GNULIB_MDA_FCLOSEALL@
+GL_GNULIB_MDA_FCVT = @GL_GNULIB_MDA_FCVT@
+GL_GNULIB_MDA_FDOPEN = @GL_GNULIB_MDA_FDOPEN@
+GL_GNULIB_MDA_FILENO = @GL_GNULIB_MDA_FILENO@
+GL_GNULIB_MDA_GCVT = @GL_GNULIB_MDA_GCVT@
+GL_GNULIB_MDA_GETCWD = @GL_GNULIB_MDA_GETCWD@
+GL_GNULIB_MDA_GETPID = @GL_GNULIB_MDA_GETPID@
+GL_GNULIB_MDA_GETW = @GL_GNULIB_MDA_GETW@
+GL_GNULIB_MDA_ISATTY = @GL_GNULIB_MDA_ISATTY@
+GL_GNULIB_MDA_LSEEK = @GL_GNULIB_MDA_LSEEK@
+GL_GNULIB_MDA_MEMCCPY = @GL_GNULIB_MDA_MEMCCPY@
+GL_GNULIB_MDA_MKDIR = @GL_GNULIB_MDA_MKDIR@
+GL_GNULIB_MDA_MKTEMP = @GL_GNULIB_MDA_MKTEMP@
+GL_GNULIB_MDA_OPEN = @GL_GNULIB_MDA_OPEN@
+GL_GNULIB_MDA_PUTENV = @GL_GNULIB_MDA_PUTENV@
+GL_GNULIB_MDA_PUTW = @GL_GNULIB_MDA_PUTW@
+GL_GNULIB_MDA_READ = @GL_GNULIB_MDA_READ@
+GL_GNULIB_MDA_RMDIR = @GL_GNULIB_MDA_RMDIR@
+GL_GNULIB_MDA_STRDUP = @GL_GNULIB_MDA_STRDUP@
+GL_GNULIB_MDA_SWAB = @GL_GNULIB_MDA_SWAB@
+GL_GNULIB_MDA_TEMPNAM = @GL_GNULIB_MDA_TEMPNAM@
+GL_GNULIB_MDA_TZSET = @GL_GNULIB_MDA_TZSET@
+GL_GNULIB_MDA_UMASK = @GL_GNULIB_MDA_UMASK@
+GL_GNULIB_MDA_UNLINK = @GL_GNULIB_MDA_UNLINK@
+GL_GNULIB_MDA_WCSDUP = @GL_GNULIB_MDA_WCSDUP@
+GL_GNULIB_MDA_WRITE = @GL_GNULIB_MDA_WRITE@
+GL_GNULIB_MEMCHR = @GL_GNULIB_MEMCHR@
+GL_GNULIB_MEMMEM = @GL_GNULIB_MEMMEM@
+GL_GNULIB_MEMPCPY = @GL_GNULIB_MEMPCPY@
+GL_GNULIB_MEMRCHR = @GL_GNULIB_MEMRCHR@
+GL_GNULIB_MKDIR = @GL_GNULIB_MKDIR@
+GL_GNULIB_MKDIRAT = @GL_GNULIB_MKDIRAT@
+GL_GNULIB_MKDTEMP = @GL_GNULIB_MKDTEMP@
+GL_GNULIB_MKFIFO = @GL_GNULIB_MKFIFO@
+GL_GNULIB_MKFIFOAT = @GL_GNULIB_MKFIFOAT@
+GL_GNULIB_MKNOD = @GL_GNULIB_MKNOD@
+GL_GNULIB_MKNODAT = @GL_GNULIB_MKNODAT@
+GL_GNULIB_MKOSTEMP = @GL_GNULIB_MKOSTEMP@
+GL_GNULIB_MKOSTEMPS = @GL_GNULIB_MKOSTEMPS@
+GL_GNULIB_MKSTEMP = @GL_GNULIB_MKSTEMP@
+GL_GNULIB_MKSTEMPS = @GL_GNULIB_MKSTEMPS@
+GL_GNULIB_MKTIME = @GL_GNULIB_MKTIME@
+GL_GNULIB_NANOSLEEP = @GL_GNULIB_NANOSLEEP@
+GL_GNULIB_NL_LANGINFO = @GL_GNULIB_NL_LANGINFO@
+GL_GNULIB_NONBLOCKING = @GL_GNULIB_NONBLOCKING@
+GL_GNULIB_OBSTACK_PRINTF = @GL_GNULIB_OBSTACK_PRINTF@
+GL_GNULIB_OBSTACK_PRINTF_POSIX = @GL_GNULIB_OBSTACK_PRINTF_POSIX@
+GL_GNULIB_OPEN = @GL_GNULIB_OPEN@
+GL_GNULIB_OPENAT = @GL_GNULIB_OPENAT@
+GL_GNULIB_OPENDIR = @GL_GNULIB_OPENDIR@
+GL_GNULIB_OVERRIDES_STRUCT_STAT = @GL_GNULIB_OVERRIDES_STRUCT_STAT@
+GL_GNULIB_PCLOSE = @GL_GNULIB_PCLOSE@
+GL_GNULIB_PERROR = @GL_GNULIB_PERROR@
+GL_GNULIB_PIPE = @GL_GNULIB_PIPE@
+GL_GNULIB_PIPE2 = @GL_GNULIB_PIPE2@
+GL_GNULIB_POPEN = @GL_GNULIB_POPEN@
+GL_GNULIB_POSIX_MEMALIGN = @GL_GNULIB_POSIX_MEMALIGN@
+GL_GNULIB_POSIX_OPENPT = @GL_GNULIB_POSIX_OPENPT@
+GL_GNULIB_PREAD = @GL_GNULIB_PREAD@
+GL_GNULIB_PRINTF = @GL_GNULIB_PRINTF@
+GL_GNULIB_PRINTF_POSIX = @GL_GNULIB_PRINTF_POSIX@
+GL_GNULIB_PSELECT = @GL_GNULIB_PSELECT@
+GL_GNULIB_PTHREAD_COND = @GL_GNULIB_PTHREAD_COND@
+GL_GNULIB_PTHREAD_MUTEX = @GL_GNULIB_PTHREAD_MUTEX@
+GL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK = @GL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK@
+GL_GNULIB_PTHREAD_ONCE = @GL_GNULIB_PTHREAD_ONCE@
+GL_GNULIB_PTHREAD_RWLOCK = @GL_GNULIB_PTHREAD_RWLOCK@
+GL_GNULIB_PTHREAD_SIGMASK = @GL_GNULIB_PTHREAD_SIGMASK@
+GL_GNULIB_PTHREAD_SPIN = @GL_GNULIB_PTHREAD_SPIN@
+GL_GNULIB_PTHREAD_THREAD = @GL_GNULIB_PTHREAD_THREAD@
+GL_GNULIB_PTHREAD_TSS = @GL_GNULIB_PTHREAD_TSS@
+GL_GNULIB_PTSNAME = @GL_GNULIB_PTSNAME@
+GL_GNULIB_PTSNAME_R = @GL_GNULIB_PTSNAME_R@
+GL_GNULIB_PUTC = @GL_GNULIB_PUTC@
+GL_GNULIB_PUTCHAR = @GL_GNULIB_PUTCHAR@
+GL_GNULIB_PUTENV = @GL_GNULIB_PUTENV@
+GL_GNULIB_PUTS = @GL_GNULIB_PUTS@
+GL_GNULIB_PWRITE = @GL_GNULIB_PWRITE@
+GL_GNULIB_QSORT_R = @GL_GNULIB_QSORT_R@
+GL_GNULIB_RAISE = @GL_GNULIB_RAISE@
+GL_GNULIB_RANDOM = @GL_GNULIB_RANDOM@
+GL_GNULIB_RANDOM_R = @GL_GNULIB_RANDOM_R@
+GL_GNULIB_RAWMEMCHR = @GL_GNULIB_RAWMEMCHR@
+GL_GNULIB_READ = @GL_GNULIB_READ@
+GL_GNULIB_READDIR = @GL_GNULIB_READDIR@
+GL_GNULIB_READLINK = @GL_GNULIB_READLINK@
+GL_GNULIB_READLINKAT = @GL_GNULIB_READLINKAT@
+GL_GNULIB_REALLOCARRAY = @GL_GNULIB_REALLOCARRAY@
+GL_GNULIB_REALLOC_POSIX = @GL_GNULIB_REALLOC_POSIX@
+GL_GNULIB_REALPATH = @GL_GNULIB_REALPATH@
+GL_GNULIB_RECV = @GL_GNULIB_RECV@
+GL_GNULIB_RECVFROM = @GL_GNULIB_RECVFROM@
+GL_GNULIB_REMOVE = @GL_GNULIB_REMOVE@
+GL_GNULIB_RENAME = @GL_GNULIB_RENAME@
+GL_GNULIB_RENAMEAT = @GL_GNULIB_RENAMEAT@
+GL_GNULIB_REWINDDIR = @GL_GNULIB_REWINDDIR@
+GL_GNULIB_RMDIR = @GL_GNULIB_RMDIR@
+GL_GNULIB_RPMATCH = @GL_GNULIB_RPMATCH@
+GL_GNULIB_SCANDIR = @GL_GNULIB_SCANDIR@
+GL_GNULIB_SCANF = @GL_GNULIB_SCANF@
+GL_GNULIB_SCHED_YIELD = @GL_GNULIB_SCHED_YIELD@
+GL_GNULIB_SECURE_GETENV = @GL_GNULIB_SECURE_GETENV@
+GL_GNULIB_SELECT = @GL_GNULIB_SELECT@
+GL_GNULIB_SEND = @GL_GNULIB_SEND@
+GL_GNULIB_SENDTO = @GL_GNULIB_SENDTO@
+GL_GNULIB_SETENV = @GL_GNULIB_SETENV@
+GL_GNULIB_SETHOSTNAME = @GL_GNULIB_SETHOSTNAME@
+GL_GNULIB_SETLOCALE = @GL_GNULIB_SETLOCALE@
+GL_GNULIB_SETLOCALE_NULL = @GL_GNULIB_SETLOCALE_NULL@
+GL_GNULIB_SETSOCKOPT = @GL_GNULIB_SETSOCKOPT@
+GL_GNULIB_SHUTDOWN = @GL_GNULIB_SHUTDOWN@
+GL_GNULIB_SIGABBREV_NP = @GL_GNULIB_SIGABBREV_NP@
+GL_GNULIB_SIGACTION = @GL_GNULIB_SIGACTION@
+GL_GNULIB_SIGDESCR_NP = @GL_GNULIB_SIGDESCR_NP@
+GL_GNULIB_SIGNAL_H_SIGPIPE = @GL_GNULIB_SIGNAL_H_SIGPIPE@
+GL_GNULIB_SIGPROCMASK = @GL_GNULIB_SIGPROCMASK@
+GL_GNULIB_SLEEP = @GL_GNULIB_SLEEP@
+GL_GNULIB_SNPRINTF = @GL_GNULIB_SNPRINTF@
+GL_GNULIB_SOCKET = @GL_GNULIB_SOCKET@
+GL_GNULIB_SPRINTF_POSIX = @GL_GNULIB_SPRINTF_POSIX@
+GL_GNULIB_STAT = @GL_GNULIB_STAT@
+GL_GNULIB_STDIO_H_NONBLOCKING = @GL_GNULIB_STDIO_H_NONBLOCKING@
+GL_GNULIB_STDIO_H_SIGPIPE = @GL_GNULIB_STDIO_H_SIGPIPE@
+GL_GNULIB_STPCPY = @GL_GNULIB_STPCPY@
+GL_GNULIB_STPNCPY = @GL_GNULIB_STPNCPY@
+GL_GNULIB_STRCASESTR = @GL_GNULIB_STRCASESTR@
+GL_GNULIB_STRCHRNUL = @GL_GNULIB_STRCHRNUL@
+GL_GNULIB_STRDUP = @GL_GNULIB_STRDUP@
+GL_GNULIB_STRERROR = @GL_GNULIB_STRERROR@
+GL_GNULIB_STRERRORNAME_NP = @GL_GNULIB_STRERRORNAME_NP@
+GL_GNULIB_STRERROR_R = @GL_GNULIB_STRERROR_R@
+GL_GNULIB_STRFTIME = @GL_GNULIB_STRFTIME@
+GL_GNULIB_STRNCAT = @GL_GNULIB_STRNCAT@
+GL_GNULIB_STRNDUP = @GL_GNULIB_STRNDUP@
+GL_GNULIB_STRNLEN = @GL_GNULIB_STRNLEN@
+GL_GNULIB_STRPBRK = @GL_GNULIB_STRPBRK@
+GL_GNULIB_STRPTIME = @GL_GNULIB_STRPTIME@
+GL_GNULIB_STRSEP = @GL_GNULIB_STRSEP@
+GL_GNULIB_STRSIGNAL = @GL_GNULIB_STRSIGNAL@
+GL_GNULIB_STRSTR = @GL_GNULIB_STRSTR@
+GL_GNULIB_STRTOD = @GL_GNULIB_STRTOD@
+GL_GNULIB_STRTOIMAX = @GL_GNULIB_STRTOIMAX@
+GL_GNULIB_STRTOK_R = @GL_GNULIB_STRTOK_R@
+GL_GNULIB_STRTOL = @GL_GNULIB_STRTOL@
+GL_GNULIB_STRTOLD = @GL_GNULIB_STRTOLD@
+GL_GNULIB_STRTOLL = @GL_GNULIB_STRTOLL@
+GL_GNULIB_STRTOUL = @GL_GNULIB_STRTOUL@
+GL_GNULIB_STRTOULL = @GL_GNULIB_STRTOULL@
+GL_GNULIB_STRTOUMAX = @GL_GNULIB_STRTOUMAX@
+GL_GNULIB_STRVERSCMP = @GL_GNULIB_STRVERSCMP@
+GL_GNULIB_SYMLINK = @GL_GNULIB_SYMLINK@
+GL_GNULIB_SYMLINKAT = @GL_GNULIB_SYMLINKAT@
+GL_GNULIB_SYSTEM_POSIX = @GL_GNULIB_SYSTEM_POSIX@
+GL_GNULIB_TIMEGM = @GL_GNULIB_TIMEGM@
+GL_GNULIB_TIMESPEC_GET = @GL_GNULIB_TIMESPEC_GET@
+GL_GNULIB_TIME_R = @GL_GNULIB_TIME_R@
+GL_GNULIB_TIME_RZ = @GL_GNULIB_TIME_RZ@
+GL_GNULIB_TMPFILE = @GL_GNULIB_TMPFILE@
+GL_GNULIB_TOWCTRANS = @GL_GNULIB_TOWCTRANS@
+GL_GNULIB_TRUNCATE = @GL_GNULIB_TRUNCATE@
+GL_GNULIB_TTYNAME_R = @GL_GNULIB_TTYNAME_R@
+GL_GNULIB_TZSET = @GL_GNULIB_TZSET@
+GL_GNULIB_UNISTD_H_GETOPT = @GL_GNULIB_UNISTD_H_GETOPT@
+GL_GNULIB_UNISTD_H_NONBLOCKING = @GL_GNULIB_UNISTD_H_NONBLOCKING@
+GL_GNULIB_UNISTD_H_SIGPIPE = @GL_GNULIB_UNISTD_H_SIGPIPE@
+GL_GNULIB_UNLINK = @GL_GNULIB_UNLINK@
+GL_GNULIB_UNLINKAT = @GL_GNULIB_UNLINKAT@
+GL_GNULIB_UNLOCKPT = @GL_GNULIB_UNLOCKPT@
+GL_GNULIB_UNSETENV = @GL_GNULIB_UNSETENV@
+GL_GNULIB_USLEEP = @GL_GNULIB_USLEEP@
+GL_GNULIB_UTIMENSAT = @GL_GNULIB_UTIMENSAT@
+GL_GNULIB_VASPRINTF = @GL_GNULIB_VASPRINTF@
+GL_GNULIB_VDPRINTF = @GL_GNULIB_VDPRINTF@
+GL_GNULIB_VFPRINTF = @GL_GNULIB_VFPRINTF@
+GL_GNULIB_VFPRINTF_POSIX = @GL_GNULIB_VFPRINTF_POSIX@
+GL_GNULIB_VFSCANF = @GL_GNULIB_VFSCANF@
+GL_GNULIB_VPRINTF = @GL_GNULIB_VPRINTF@
+GL_GNULIB_VPRINTF_POSIX = @GL_GNULIB_VPRINTF_POSIX@
+GL_GNULIB_VSCANF = @GL_GNULIB_VSCANF@
+GL_GNULIB_VSNPRINTF = @GL_GNULIB_VSNPRINTF@
+GL_GNULIB_VSPRINTF_POSIX = @GL_GNULIB_VSPRINTF_POSIX@
+GL_GNULIB_WCPCPY = @GL_GNULIB_WCPCPY@
+GL_GNULIB_WCPNCPY = @GL_GNULIB_WCPNCPY@
+GL_GNULIB_WCRTOMB = @GL_GNULIB_WCRTOMB@
+GL_GNULIB_WCSCASECMP = @GL_GNULIB_WCSCASECMP@
+GL_GNULIB_WCSCAT = @GL_GNULIB_WCSCAT@
+GL_GNULIB_WCSCHR = @GL_GNULIB_WCSCHR@
+GL_GNULIB_WCSCMP = @GL_GNULIB_WCSCMP@
+GL_GNULIB_WCSCOLL = @GL_GNULIB_WCSCOLL@
+GL_GNULIB_WCSCPY = @GL_GNULIB_WCSCPY@
+GL_GNULIB_WCSCSPN = @GL_GNULIB_WCSCSPN@
+GL_GNULIB_WCSDUP = @GL_GNULIB_WCSDUP@
+GL_GNULIB_WCSFTIME = @GL_GNULIB_WCSFTIME@
+GL_GNULIB_WCSLEN = @GL_GNULIB_WCSLEN@
+GL_GNULIB_WCSNCASECMP = @GL_GNULIB_WCSNCASECMP@
+GL_GNULIB_WCSNCAT = @GL_GNULIB_WCSNCAT@
+GL_GNULIB_WCSNCMP = @GL_GNULIB_WCSNCMP@
+GL_GNULIB_WCSNCPY = @GL_GNULIB_WCSNCPY@
+GL_GNULIB_WCSNLEN = @GL_GNULIB_WCSNLEN@
+GL_GNULIB_WCSNRTOMBS = @GL_GNULIB_WCSNRTOMBS@
+GL_GNULIB_WCSPBRK = @GL_GNULIB_WCSPBRK@
+GL_GNULIB_WCSRCHR = @GL_GNULIB_WCSRCHR@
+GL_GNULIB_WCSRTOMBS = @GL_GNULIB_WCSRTOMBS@
+GL_GNULIB_WCSSPN = @GL_GNULIB_WCSSPN@
+GL_GNULIB_WCSSTR = @GL_GNULIB_WCSSTR@
+GL_GNULIB_WCSTOK = @GL_GNULIB_WCSTOK@
+GL_GNULIB_WCSWIDTH = @GL_GNULIB_WCSWIDTH@
+GL_GNULIB_WCSXFRM = @GL_GNULIB_WCSXFRM@
+GL_GNULIB_WCTOB = @GL_GNULIB_WCTOB@
+GL_GNULIB_WCTOMB = @GL_GNULIB_WCTOMB@
+GL_GNULIB_WCTRANS = @GL_GNULIB_WCTRANS@
+GL_GNULIB_WCTYPE = @GL_GNULIB_WCTYPE@
+GL_GNULIB_WCWIDTH = @GL_GNULIB_WCWIDTH@
+GL_GNULIB_WMEMCHR = @GL_GNULIB_WMEMCHR@
+GL_GNULIB_WMEMCMP = @GL_GNULIB_WMEMCMP@
+GL_GNULIB_WMEMCPY = @GL_GNULIB_WMEMCPY@
+GL_GNULIB_WMEMMOVE = @GL_GNULIB_WMEMMOVE@
+GL_GNULIB_WMEMPCPY = @GL_GNULIB_WMEMPCPY@
+GL_GNULIB_WMEMSET = @GL_GNULIB_WMEMSET@
+GL_GNULIB_WRITE = @GL_GNULIB_WRITE@
+GL_GNULIB__EXIT = @GL_GNULIB__EXIT@
+GMSGFMT = @GMSGFMT@
+GMSGFMT_015 = @GMSGFMT_015@
+GNULIBHEADERS_OVERRIDE_WINT_T = @GNULIBHEADERS_OVERRIDE_WINT_T@
+GNULIB_GETTIMEOFDAY = @GNULIB_GETTIMEOFDAY@
+GNULIB_TEST_WARN_CFLAGS = @GNULIB_TEST_WARN_CFLAGS@
+GNULIB_WARN_CFLAGS = @GNULIB_WARN_CFLAGS@
+GREP = @GREP@
+HAVE_ACCEPT4 = @HAVE_ACCEPT4@
+HAVE_ALIGNED_ALLOC = @HAVE_ALIGNED_ALLOC@
+HAVE_ALLOCA_H = @HAVE_ALLOCA_H@
+HAVE_ALPHASORT = @HAVE_ALPHASORT@
+HAVE_ARPA_INET_H = @HAVE_ARPA_INET_H@
+HAVE_ATOLL = @HAVE_ATOLL@
+HAVE_BTOWC = @HAVE_BTOWC@
+HAVE_C99_STDINT_H = @HAVE_C99_STDINT_H@
+HAVE_CANONICALIZE_FILE_NAME = @HAVE_CANONICALIZE_FILE_NAME@
+HAVE_CHOWN = @HAVE_CHOWN@
+HAVE_CLOSEDIR = @HAVE_CLOSEDIR@
+HAVE_COPY_FILE_RANGE = @HAVE_COPY_FILE_RANGE@
+HAVE_CRTDEFS_H = @HAVE_CRTDEFS_H@
+HAVE_DECL_DIRFD = @HAVE_DECL_DIRFD@
+HAVE_DECL_ECVT = @HAVE_DECL_ECVT@
+HAVE_DECL_ENVIRON = @HAVE_DECL_ENVIRON@
+HAVE_DECL_EXECVPE = @HAVE_DECL_EXECVPE@
+HAVE_DECL_FCHDIR = @HAVE_DECL_FCHDIR@
+HAVE_DECL_FCLOSEALL = @HAVE_DECL_FCLOSEALL@
+HAVE_DECL_FCVT = @HAVE_DECL_FCVT@
+HAVE_DECL_FDATASYNC = @HAVE_DECL_FDATASYNC@
+HAVE_DECL_FDOPENDIR = @HAVE_DECL_FDOPENDIR@
+HAVE_DECL_FPURGE = @HAVE_DECL_FPURGE@
+HAVE_DECL_FSEEKO = @HAVE_DECL_FSEEKO@
+HAVE_DECL_FTELLO = @HAVE_DECL_FTELLO@
+HAVE_DECL_GCVT = @HAVE_DECL_GCVT@
+HAVE_DECL_GETDELIM = @HAVE_DECL_GETDELIM@
+HAVE_DECL_GETDOMAINNAME = @HAVE_DECL_GETDOMAINNAME@
+HAVE_DECL_GETLINE = @HAVE_DECL_GETLINE@
+HAVE_DECL_GETLOADAVG = @HAVE_DECL_GETLOADAVG@
+HAVE_DECL_GETLOGIN = @HAVE_DECL_GETLOGIN@
+HAVE_DECL_GETLOGIN_R = @HAVE_DECL_GETLOGIN_R@
+HAVE_DECL_GETPAGESIZE = @HAVE_DECL_GETPAGESIZE@
+HAVE_DECL_GETUSERSHELL = @HAVE_DECL_GETUSERSHELL@
+HAVE_DECL_IMAXABS = @HAVE_DECL_IMAXABS@
+HAVE_DECL_IMAXDIV = @HAVE_DECL_IMAXDIV@
+HAVE_DECL_INET_NTOP = @HAVE_DECL_INET_NTOP@
+HAVE_DECL_INET_PTON = @HAVE_DECL_INET_PTON@
+HAVE_DECL_INITSTATE = @HAVE_DECL_INITSTATE@
+HAVE_DECL_LOCALTIME_R = @HAVE_DECL_LOCALTIME_R@
+HAVE_DECL_MEMMEM = @HAVE_DECL_MEMMEM@
+HAVE_DECL_MEMRCHR = @HAVE_DECL_MEMRCHR@
+HAVE_DECL_OBSTACK_PRINTF = @HAVE_DECL_OBSTACK_PRINTF@
+HAVE_DECL_SETENV = @HAVE_DECL_SETENV@
+HAVE_DECL_SETHOSTNAME = @HAVE_DECL_SETHOSTNAME@
+HAVE_DECL_SETSTATE = @HAVE_DECL_SETSTATE@
+HAVE_DECL_SNPRINTF = @HAVE_DECL_SNPRINTF@
+HAVE_DECL_STRDUP = @HAVE_DECL_STRDUP@
+HAVE_DECL_STRERROR_R = @HAVE_DECL_STRERROR_R@
+HAVE_DECL_STRNDUP = @HAVE_DECL_STRNDUP@
+HAVE_DECL_STRNLEN = @HAVE_DECL_STRNLEN@
+HAVE_DECL_STRSIGNAL = @HAVE_DECL_STRSIGNAL@
+HAVE_DECL_STRTOIMAX = @HAVE_DECL_STRTOIMAX@
+HAVE_DECL_STRTOK_R = @HAVE_DECL_STRTOK_R@
+HAVE_DECL_STRTOUMAX = @HAVE_DECL_STRTOUMAX@
+HAVE_DECL_TRUNCATE = @HAVE_DECL_TRUNCATE@
+HAVE_DECL_TTYNAME_R = @HAVE_DECL_TTYNAME_R@
+HAVE_DECL_UNSETENV = @HAVE_DECL_UNSETENV@
+HAVE_DECL_VSNPRINTF = @HAVE_DECL_VSNPRINTF@
+HAVE_DECL_WCSDUP = @HAVE_DECL_WCSDUP@
+HAVE_DECL_WCTOB = @HAVE_DECL_WCTOB@
+HAVE_DECL_WCWIDTH = @HAVE_DECL_WCWIDTH@
+HAVE_DIRENT_H = @HAVE_DIRENT_H@
+HAVE_DPRINTF = @HAVE_DPRINTF@
+HAVE_DUP3 = @HAVE_DUP3@
+HAVE_DUPLOCALE = @HAVE_DUPLOCALE@
+HAVE_EUIDACCESS = @HAVE_EUIDACCESS@
+HAVE_EXECVPE = @HAVE_EXECVPE@
+HAVE_EXPLICIT_BZERO = @HAVE_EXPLICIT_BZERO@
+HAVE_FACCESSAT = @HAVE_FACCESSAT@
+HAVE_FCHDIR = @HAVE_FCHDIR@
+HAVE_FCHMODAT = @HAVE_FCHMODAT@
+HAVE_FCHOWNAT = @HAVE_FCHOWNAT@
+HAVE_FCNTL = @HAVE_FCNTL@
+HAVE_FDATASYNC = @HAVE_FDATASYNC@
+HAVE_FDOPENDIR = @HAVE_FDOPENDIR@
+HAVE_FEATURES_H = @HAVE_FEATURES_H@
+HAVE_FFSL = @HAVE_FFSL@
+HAVE_FFSLL = @HAVE_FFSLL@
+HAVE_FNMATCH = @HAVE_FNMATCH@
+HAVE_FNMATCH_H = @HAVE_FNMATCH_H@
+HAVE_FREELOCALE = @HAVE_FREELOCALE@
+HAVE_FSEEKO = @HAVE_FSEEKO@
+HAVE_FSTATAT = @HAVE_FSTATAT@
+HAVE_FSYNC = @HAVE_FSYNC@
+HAVE_FTELLO = @HAVE_FTELLO@
+HAVE_FTRUNCATE = @HAVE_FTRUNCATE@
+HAVE_FUTIMENS = @HAVE_FUTIMENS@
+HAVE_GETDTABLESIZE = @HAVE_GETDTABLESIZE@
+HAVE_GETENTROPY = @HAVE_GETENTROPY@
+HAVE_GETGROUPS = @HAVE_GETGROUPS@
+HAVE_GETHOSTNAME = @HAVE_GETHOSTNAME@
+HAVE_GETLOGIN = @HAVE_GETLOGIN@
+HAVE_GETOPT_H = @HAVE_GETOPT_H@
+HAVE_GETPAGESIZE = @HAVE_GETPAGESIZE@
+HAVE_GETPASS = @HAVE_GETPASS@
+HAVE_GETSUBOPT = @HAVE_GETSUBOPT@
+HAVE_GETTIMEOFDAY = @HAVE_GETTIMEOFDAY@
+HAVE_GETUMASK = @HAVE_GETUMASK@
+HAVE_GRANTPT = @HAVE_GRANTPT@
+HAVE_GROUP_MEMBER = @HAVE_GROUP_MEMBER@
+HAVE_IMAXDIV_T = @HAVE_IMAXDIV_T@
+HAVE_INITSTATE = @HAVE_INITSTATE@
+HAVE_INTTYPES_H = @HAVE_INTTYPES_H@
+HAVE_ISBLANK = @HAVE_ISBLANK@
+HAVE_ISWBLANK = @HAVE_ISWBLANK@
+HAVE_ISWCNTRL = @HAVE_ISWCNTRL@
+HAVE_LANGINFO_ALTMON = @HAVE_LANGINFO_ALTMON@
+HAVE_LANGINFO_CODESET = @HAVE_LANGINFO_CODESET@
+HAVE_LANGINFO_ERA = @HAVE_LANGINFO_ERA@
+HAVE_LANGINFO_H = @HAVE_LANGINFO_H@
+HAVE_LANGINFO_T_FMT_AMPM = @HAVE_LANGINFO_T_FMT_AMPM@
+HAVE_LANGINFO_YESEXPR = @HAVE_LANGINFO_YESEXPR@
+HAVE_LCHMOD = @HAVE_LCHMOD@
+HAVE_LCHOWN = @HAVE_LCHOWN@
+HAVE_LIBSIGSEGV = @HAVE_LIBSIGSEGV@
+HAVE_LINK = @HAVE_LINK@
+HAVE_LINKAT = @HAVE_LINKAT@
+HAVE_LSTAT = @HAVE_LSTAT@
+HAVE_MAX_ALIGN_T = @HAVE_MAX_ALIGN_T@
+HAVE_MBRLEN = @HAVE_MBRLEN@
+HAVE_MBRTOWC = @HAVE_MBRTOWC@
+HAVE_MBSINIT = @HAVE_MBSINIT@
+HAVE_MBSLEN = @HAVE_MBSLEN@
+HAVE_MBSNRTOWCS = @HAVE_MBSNRTOWCS@
+HAVE_MBSRTOWCS = @HAVE_MBSRTOWCS@
+HAVE_MBTOWC = @HAVE_MBTOWC@
+HAVE_MEMPCPY = @HAVE_MEMPCPY@
+HAVE_MKDIRAT = @HAVE_MKDIRAT@
+HAVE_MKDTEMP = @HAVE_MKDTEMP@
+HAVE_MKFIFO = @HAVE_MKFIFO@
+HAVE_MKFIFOAT = @HAVE_MKFIFOAT@
+HAVE_MKNOD = @HAVE_MKNOD@
+HAVE_MKNODAT = @HAVE_MKNODAT@
+HAVE_MKOSTEMP = @HAVE_MKOSTEMP@
+HAVE_MKOSTEMPS = @HAVE_MKOSTEMPS@
+HAVE_MKSTEMP = @HAVE_MKSTEMP@
+HAVE_MKSTEMPS = @HAVE_MKSTEMPS@
+HAVE_MSVC_INVALID_PARAMETER_HANDLER = @HAVE_MSVC_INVALID_PARAMETER_HANDLER@
+HAVE_NANOSLEEP = @HAVE_NANOSLEEP@
+HAVE_NETINET_IN_H = @HAVE_NETINET_IN_H@
+HAVE_NEWLOCALE = @HAVE_NEWLOCALE@
+HAVE_NL_LANGINFO = @HAVE_NL_LANGINFO@
+HAVE_OPENAT = @HAVE_OPENAT@
+HAVE_OPENDIR = @HAVE_OPENDIR@
+HAVE_OS_H = @HAVE_OS_H@
+HAVE_PCLOSE = @HAVE_PCLOSE@
+HAVE_PIPE = @HAVE_PIPE@
+HAVE_PIPE2 = @HAVE_PIPE2@
+HAVE_POPEN = @HAVE_POPEN@
+HAVE_POSIX_MEMALIGN = @HAVE_POSIX_MEMALIGN@
+HAVE_POSIX_OPENPT = @HAVE_POSIX_OPENPT@
+HAVE_POSIX_SIGNALBLOCKING = @HAVE_POSIX_SIGNALBLOCKING@
+HAVE_PREAD = @HAVE_PREAD@
+HAVE_PSELECT = @HAVE_PSELECT@
+HAVE_PTHREAD_ATTR_DESTROY = @HAVE_PTHREAD_ATTR_DESTROY@
+HAVE_PTHREAD_ATTR_GETDETACHSTATE = @HAVE_PTHREAD_ATTR_GETDETACHSTATE@
+HAVE_PTHREAD_ATTR_INIT = @HAVE_PTHREAD_ATTR_INIT@
+HAVE_PTHREAD_ATTR_SETDETACHSTATE = @HAVE_PTHREAD_ATTR_SETDETACHSTATE@
+HAVE_PTHREAD_CONDATTR_DESTROY = @HAVE_PTHREAD_CONDATTR_DESTROY@
+HAVE_PTHREAD_CONDATTR_INIT = @HAVE_PTHREAD_CONDATTR_INIT@
+HAVE_PTHREAD_COND_BROADCAST = @HAVE_PTHREAD_COND_BROADCAST@
+HAVE_PTHREAD_COND_DESTROY = @HAVE_PTHREAD_COND_DESTROY@
+HAVE_PTHREAD_COND_INIT = @HAVE_PTHREAD_COND_INIT@
+HAVE_PTHREAD_COND_SIGNAL = @HAVE_PTHREAD_COND_SIGNAL@
+HAVE_PTHREAD_COND_TIMEDWAIT = @HAVE_PTHREAD_COND_TIMEDWAIT@
+HAVE_PTHREAD_COND_WAIT = @HAVE_PTHREAD_COND_WAIT@
+HAVE_PTHREAD_CREATE = @HAVE_PTHREAD_CREATE@
+HAVE_PTHREAD_CREATE_DETACHED = @HAVE_PTHREAD_CREATE_DETACHED@
+HAVE_PTHREAD_DETACH = @HAVE_PTHREAD_DETACH@
+HAVE_PTHREAD_EQUAL = @HAVE_PTHREAD_EQUAL@
+HAVE_PTHREAD_EXIT = @HAVE_PTHREAD_EXIT@
+HAVE_PTHREAD_GETSPECIFIC = @HAVE_PTHREAD_GETSPECIFIC@
+HAVE_PTHREAD_H = @HAVE_PTHREAD_H@
+HAVE_PTHREAD_JOIN = @HAVE_PTHREAD_JOIN@
+HAVE_PTHREAD_KEY_CREATE = @HAVE_PTHREAD_KEY_CREATE@
+HAVE_PTHREAD_KEY_DELETE = @HAVE_PTHREAD_KEY_DELETE@
+HAVE_PTHREAD_MUTEXATTR_DESTROY = @HAVE_PTHREAD_MUTEXATTR_DESTROY@
+HAVE_PTHREAD_MUTEXATTR_GETROBUST = @HAVE_PTHREAD_MUTEXATTR_GETROBUST@
+HAVE_PTHREAD_MUTEXATTR_GETTYPE = @HAVE_PTHREAD_MUTEXATTR_GETTYPE@
+HAVE_PTHREAD_MUTEXATTR_INIT = @HAVE_PTHREAD_MUTEXATTR_INIT@
+HAVE_PTHREAD_MUTEXATTR_SETROBUST = @HAVE_PTHREAD_MUTEXATTR_SETROBUST@
+HAVE_PTHREAD_MUTEXATTR_SETTYPE = @HAVE_PTHREAD_MUTEXATTR_SETTYPE@
+HAVE_PTHREAD_MUTEX_DESTROY = @HAVE_PTHREAD_MUTEX_DESTROY@
+HAVE_PTHREAD_MUTEX_INIT = @HAVE_PTHREAD_MUTEX_INIT@
+HAVE_PTHREAD_MUTEX_LOCK = @HAVE_PTHREAD_MUTEX_LOCK@
+HAVE_PTHREAD_MUTEX_RECURSIVE = @HAVE_PTHREAD_MUTEX_RECURSIVE@
+HAVE_PTHREAD_MUTEX_ROBUST = @HAVE_PTHREAD_MUTEX_ROBUST@
+HAVE_PTHREAD_MUTEX_TIMEDLOCK = @HAVE_PTHREAD_MUTEX_TIMEDLOCK@
+HAVE_PTHREAD_MUTEX_TRYLOCK = @HAVE_PTHREAD_MUTEX_TRYLOCK@
+HAVE_PTHREAD_MUTEX_UNLOCK = @HAVE_PTHREAD_MUTEX_UNLOCK@
+HAVE_PTHREAD_ONCE = @HAVE_PTHREAD_ONCE@
+HAVE_PTHREAD_PROCESS_SHARED = @HAVE_PTHREAD_PROCESS_SHARED@
+HAVE_PTHREAD_RWLOCKATTR_DESTROY = @HAVE_PTHREAD_RWLOCKATTR_DESTROY@
+HAVE_PTHREAD_RWLOCKATTR_INIT = @HAVE_PTHREAD_RWLOCKATTR_INIT@
+HAVE_PTHREAD_RWLOCK_DESTROY = @HAVE_PTHREAD_RWLOCK_DESTROY@
+HAVE_PTHREAD_RWLOCK_INIT = @HAVE_PTHREAD_RWLOCK_INIT@
+HAVE_PTHREAD_RWLOCK_RDLOCK = @HAVE_PTHREAD_RWLOCK_RDLOCK@
+HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK = @HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK@
+HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK = @HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK@
+HAVE_PTHREAD_RWLOCK_TRYRDLOCK = @HAVE_PTHREAD_RWLOCK_TRYRDLOCK@
+HAVE_PTHREAD_RWLOCK_TRYWRLOCK = @HAVE_PTHREAD_RWLOCK_TRYWRLOCK@
+HAVE_PTHREAD_RWLOCK_UNLOCK = @HAVE_PTHREAD_RWLOCK_UNLOCK@
+HAVE_PTHREAD_RWLOCK_WRLOCK = @HAVE_PTHREAD_RWLOCK_WRLOCK@
+HAVE_PTHREAD_SELF = @HAVE_PTHREAD_SELF@
+HAVE_PTHREAD_SETSPECIFIC = @HAVE_PTHREAD_SETSPECIFIC@
+HAVE_PTHREAD_SIGMASK = @HAVE_PTHREAD_SIGMASK@
+HAVE_PTHREAD_SPINLOCK_T = @HAVE_PTHREAD_SPINLOCK_T@
+HAVE_PTHREAD_SPIN_DESTROY = @HAVE_PTHREAD_SPIN_DESTROY@
+HAVE_PTHREAD_SPIN_INIT = @HAVE_PTHREAD_SPIN_INIT@
+HAVE_PTHREAD_SPIN_LOCK = @HAVE_PTHREAD_SPIN_LOCK@
+HAVE_PTHREAD_SPIN_TRYLOCK = @HAVE_PTHREAD_SPIN_TRYLOCK@
+HAVE_PTHREAD_SPIN_UNLOCK = @HAVE_PTHREAD_SPIN_UNLOCK@
+HAVE_PTHREAD_T = @HAVE_PTHREAD_T@
+HAVE_PTSNAME = @HAVE_PTSNAME@
+HAVE_PTSNAME_R = @HAVE_PTSNAME_R@
+HAVE_PWRITE = @HAVE_PWRITE@
+HAVE_QSORT_R = @HAVE_QSORT_R@
+HAVE_RAISE = @HAVE_RAISE@
+HAVE_RANDOM = @HAVE_RANDOM@
+HAVE_RANDOM_H = @HAVE_RANDOM_H@
+HAVE_RANDOM_R = @HAVE_RANDOM_R@
+HAVE_RAWMEMCHR = @HAVE_RAWMEMCHR@
+HAVE_READDIR = @HAVE_READDIR@
+HAVE_READLINK = @HAVE_READLINK@
+HAVE_READLINKAT = @HAVE_READLINKAT@
+HAVE_REALLOCARRAY = @HAVE_REALLOCARRAY@
+HAVE_REALPATH = @HAVE_REALPATH@
+HAVE_RENAMEAT = @HAVE_RENAMEAT@
+HAVE_REWINDDIR = @HAVE_REWINDDIR@
+HAVE_RPMATCH = @HAVE_RPMATCH@
+HAVE_SA_FAMILY_T = @HAVE_SA_FAMILY_T@
+HAVE_SCANDIR = @HAVE_SCANDIR@
+HAVE_SCHED_H = @HAVE_SCHED_H@
+HAVE_SCHED_YIELD = @HAVE_SCHED_YIELD@
+HAVE_SECURE_GETENV = @HAVE_SECURE_GETENV@
+HAVE_SETENV = @HAVE_SETENV@
+HAVE_SETHOSTNAME = @HAVE_SETHOSTNAME@
+HAVE_SETSTATE = @HAVE_SETSTATE@
+HAVE_SIGABBREV_NP = @HAVE_SIGABBREV_NP@
+HAVE_SIGACTION = @HAVE_SIGACTION@
+HAVE_SIGDESCR_NP = @HAVE_SIGDESCR_NP@
+HAVE_SIGHANDLER_T = @HAVE_SIGHANDLER_T@
+HAVE_SIGINFO_T = @HAVE_SIGINFO_T@
+HAVE_SIGNED_SIG_ATOMIC_T = @HAVE_SIGNED_SIG_ATOMIC_T@
+HAVE_SIGNED_WCHAR_T = @HAVE_SIGNED_WCHAR_T@
+HAVE_SIGNED_WINT_T = @HAVE_SIGNED_WINT_T@
+HAVE_SIGSET_T = @HAVE_SIGSET_T@
+HAVE_SLEEP = @HAVE_SLEEP@
+HAVE_STDINT_H = @HAVE_STDINT_H@
+HAVE_STPCPY = @HAVE_STPCPY@
+HAVE_STPNCPY = @HAVE_STPNCPY@
+HAVE_STRCASESTR = @HAVE_STRCASESTR@
+HAVE_STRCHRNUL = @HAVE_STRCHRNUL@
+HAVE_STRERRORNAME_NP = @HAVE_STRERRORNAME_NP@
+HAVE_STRPBRK = @HAVE_STRPBRK@
+HAVE_STRPTIME = @HAVE_STRPTIME@
+HAVE_STRSEP = @HAVE_STRSEP@
+HAVE_STRTOD = @HAVE_STRTOD@
+HAVE_STRTOL = @HAVE_STRTOL@
+HAVE_STRTOLD = @HAVE_STRTOLD@
+HAVE_STRTOLL = @HAVE_STRTOLL@
+HAVE_STRTOUL = @HAVE_STRTOUL@
+HAVE_STRTOULL = @HAVE_STRTOULL@
+HAVE_STRUCT_RANDOM_DATA = @HAVE_STRUCT_RANDOM_DATA@
+HAVE_STRUCT_SCHED_PARAM = @HAVE_STRUCT_SCHED_PARAM@
+HAVE_STRUCT_SIGACTION_SA_SIGACTION = @HAVE_STRUCT_SIGACTION_SA_SIGACTION@
+HAVE_STRUCT_SOCKADDR_STORAGE = @HAVE_STRUCT_SOCKADDR_STORAGE@
+HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY = @HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY@
+HAVE_STRUCT_TIMEVAL = @HAVE_STRUCT_TIMEVAL@
+HAVE_STRVERSCMP = @HAVE_STRVERSCMP@
+HAVE_SYMLINK = @HAVE_SYMLINK@
+HAVE_SYMLINKAT = @HAVE_SYMLINKAT@
+HAVE_SYS_BITYPES_H = @HAVE_SYS_BITYPES_H@
+HAVE_SYS_CDEFS_H = @HAVE_SYS_CDEFS_H@
+HAVE_SYS_INTTYPES_H = @HAVE_SYS_INTTYPES_H@
+HAVE_SYS_IOCTL_H = @HAVE_SYS_IOCTL_H@
+HAVE_SYS_LOADAVG_H = @HAVE_SYS_LOADAVG_H@
+HAVE_SYS_PARAM_H = @HAVE_SYS_PARAM_H@
+HAVE_SYS_SELECT_H = @HAVE_SYS_SELECT_H@
+HAVE_SYS_SOCKET_H = @HAVE_SYS_SOCKET_H@
+HAVE_SYS_TIME_H = @HAVE_SYS_TIME_H@
+HAVE_SYS_TYPES_H = @HAVE_SYS_TYPES_H@
+HAVE_SYS_UIO_H = @HAVE_SYS_UIO_H@
+HAVE_TIMEGM = @HAVE_TIMEGM@
+HAVE_TIMESPEC_GET = @HAVE_TIMESPEC_GET@
+HAVE_TIMEZONE_T = @HAVE_TIMEZONE_T@
+HAVE_TYPE_VOLATILE_SIG_ATOMIC_T = @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
+HAVE_UNISTD_H = @HAVE_UNISTD_H@
+HAVE_UNLINKAT = @HAVE_UNLINKAT@
+HAVE_UNLOCKPT = @HAVE_UNLOCKPT@
+HAVE_USLEEP = @HAVE_USLEEP@
+HAVE_UTIMENSAT = @HAVE_UTIMENSAT@
+HAVE_VASPRINTF = @HAVE_VASPRINTF@
+HAVE_VDPRINTF = @HAVE_VDPRINTF@
+HAVE_VISIBILITY = @HAVE_VISIBILITY@
+HAVE_WCHAR_H = @HAVE_WCHAR_H@
+HAVE_WCHAR_T = @HAVE_WCHAR_T@
+HAVE_WCPCPY = @HAVE_WCPCPY@
+HAVE_WCPNCPY = @HAVE_WCPNCPY@
+HAVE_WCRTOMB = @HAVE_WCRTOMB@
+HAVE_WCSCASECMP = @HAVE_WCSCASECMP@
+HAVE_WCSCAT = @HAVE_WCSCAT@
+HAVE_WCSCHR = @HAVE_WCSCHR@
+HAVE_WCSCMP = @HAVE_WCSCMP@
+HAVE_WCSCOLL = @HAVE_WCSCOLL@
+HAVE_WCSCPY = @HAVE_WCSCPY@
+HAVE_WCSCSPN = @HAVE_WCSCSPN@
+HAVE_WCSDUP = @HAVE_WCSDUP@
+HAVE_WCSFTIME = @HAVE_WCSFTIME@
+HAVE_WCSLEN = @HAVE_WCSLEN@
+HAVE_WCSNCASECMP = @HAVE_WCSNCASECMP@
+HAVE_WCSNCAT = @HAVE_WCSNCAT@
+HAVE_WCSNCMP = @HAVE_WCSNCMP@
+HAVE_WCSNCPY = @HAVE_WCSNCPY@
+HAVE_WCSNLEN = @HAVE_WCSNLEN@
+HAVE_WCSNRTOMBS = @HAVE_WCSNRTOMBS@
+HAVE_WCSPBRK = @HAVE_WCSPBRK@
+HAVE_WCSRCHR = @HAVE_WCSRCHR@
+HAVE_WCSRTOMBS = @HAVE_WCSRTOMBS@
+HAVE_WCSSPN = @HAVE_WCSSPN@
+HAVE_WCSSTR = @HAVE_WCSSTR@
+HAVE_WCSTOK = @HAVE_WCSTOK@
+HAVE_WCSWIDTH = @HAVE_WCSWIDTH@
+HAVE_WCSXFRM = @HAVE_WCSXFRM@
+HAVE_WCTRANS_T = @HAVE_WCTRANS_T@
+HAVE_WCTYPE_H = @HAVE_WCTYPE_H@
+HAVE_WCTYPE_T = @HAVE_WCTYPE_T@
+HAVE_WINSOCK2_H = @HAVE_WINSOCK2_H@
+HAVE_WINT_T = @HAVE_WINT_T@
+HAVE_WMEMCHR = @HAVE_WMEMCHR@
+HAVE_WMEMCMP = @HAVE_WMEMCMP@
+HAVE_WMEMCPY = @HAVE_WMEMCPY@
+HAVE_WMEMMOVE = @HAVE_WMEMMOVE@
+HAVE_WMEMPCPY = @HAVE_WMEMPCPY@
+HAVE_WMEMSET = @HAVE_WMEMSET@
+HAVE_WS2TCPIP_H = @HAVE_WS2TCPIP_H@
+HAVE_XLOCALE_H = @HAVE_XLOCALE_H@
+HAVE__BOOL = @HAVE__BOOL@
+HAVE__EXIT = @HAVE__EXIT@
+HOST_CPU = @HOST_CPU@
+HOST_CPU_C_ABI = @HOST_CPU_C_ABI@
+ICONV_CONST = @ICONV_CONST@
+ICONV_H = @ICONV_H@
+INCLUDE_NEXT = @INCLUDE_NEXT@
+INCLUDE_NEXT_AS_FIRST_DIRECTIVE = @INCLUDE_NEXT_AS_FIRST_DIRECTIVE@
+INET_PTON_LIB = @INET_PTON_LIB@
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+INT32_MAX_LT_INTMAX_MAX = @INT32_MAX_LT_INTMAX_MAX@
+INT64_MAX_EQ_LONG_MAX = @INT64_MAX_EQ_LONG_MAX@
+INTLLIBS = @INTLLIBS@
+INTL_MACOSX_LIBS = @INTL_MACOSX_LIBS@
+LDFLAGS = @LDFLAGS@
+LIBCSTACK = @LIBCSTACK@
+LIBGREPUTILS_LIBDEPS = @LIBGREPUTILS_LIBDEPS@
+LIBGREPUTILS_LTLIBDEPS = @LIBGREPUTILS_LTLIBDEPS@
+LIBICONV = @LIBICONV@
+LIBINTL = @LIBINTL@
+LIBMULTITHREAD = @LIBMULTITHREAD@
+LIBOBJS = @LIBOBJS@
+LIBPMULTITHREAD = @LIBPMULTITHREAD@
+LIBPTHREAD = @LIBPTHREAD@
+LIBS = @LIBS@
+LIBSIGSEGV = @LIBSIGSEGV@
+LIBSIGSEGV_PREFIX = @LIBSIGSEGV_PREFIX@
+LIBSOCKET = @LIBSOCKET@
+LIBSTDTHREAD = @LIBSTDTHREAD@
+LIBTESTS_LIBDEPS = @LIBTESTS_LIBDEPS@
+LIBTHREAD = @LIBTHREAD@
+LIBUNISTRING_UNISTR_H = @LIBUNISTRING_UNISTR_H@
+LIBUNISTRING_UNITYPES_H = @LIBUNISTRING_UNITYPES_H@
+LIBUNISTRING_UNIWIDTH_H = @LIBUNISTRING_UNIWIDTH_H@
+LIB_HARD_LOCALE = @LIB_HARD_LOCALE@
+LIB_MBRTOWC = @LIB_MBRTOWC@
+LIB_NANOSLEEP = @LIB_NANOSLEEP@
+LIB_NL_LANGINFO = @LIB_NL_LANGINFO@
+LIB_PTHREAD = @LIB_PTHREAD@
+LIB_PTHREAD_SIGMASK = @LIB_PTHREAD_SIGMASK@
+LIB_SCHED_YIELD = @LIB_SCHED_YIELD@
+LIB_SELECT = @LIB_SELECT@
+LIB_SETLOCALE = @LIB_SETLOCALE@
+LIB_SETLOCALE_NULL = @LIB_SETLOCALE_NULL@
+LIMITS_H = @LIMITS_H@
+LOCALCHARSET_TESTS_ENVIRONMENT = @LOCALCHARSET_TESTS_ENVIRONMENT@
+LOCALENAME_ENHANCE_LOCALE_FUNCS = @LOCALENAME_ENHANCE_LOCALE_FUNCS@
+LOCALE_FR = @LOCALE_FR@
+LOCALE_FR_UTF8 = @LOCALE_FR_UTF8@
+LOCALE_JA = @LOCALE_JA@
+LOCALE_TR_UTF8 = @LOCALE_TR_UTF8@
+LOCALE_ZH_CN = @LOCALE_ZH_CN@
+LTLIBCSTACK = @LTLIBCSTACK@
+LTLIBICONV = @LTLIBICONV@
+LTLIBINTL = @LTLIBINTL@
+LTLIBMULTITHREAD = @LTLIBMULTITHREAD@
+LTLIBOBJS = @LTLIBOBJS@
+LTLIBSIGSEGV = @LTLIBSIGSEGV@
+LTLIBTHREAD = @LTLIBTHREAD@
+MAKEINFO = @MAKEINFO@
+MKDIR_P = @MKDIR_P@
+MSGFMT = @MSGFMT@
+MSGFMT_015 = @MSGFMT_015@
+MSGMERGE = @MSGMERGE@
+NETINET_IN_H = @NETINET_IN_H@
+NEXT_ARPA_INET_H = @NEXT_ARPA_INET_H@
+NEXT_AS_FIRST_DIRECTIVE_ARPA_INET_H = @NEXT_AS_FIRST_DIRECTIVE_ARPA_INET_H@
+NEXT_AS_FIRST_DIRECTIVE_CTYPE_H = @NEXT_AS_FIRST_DIRECTIVE_CTYPE_H@
+NEXT_AS_FIRST_DIRECTIVE_DIRENT_H = @NEXT_AS_FIRST_DIRECTIVE_DIRENT_H@
+NEXT_AS_FIRST_DIRECTIVE_ERRNO_H = @NEXT_AS_FIRST_DIRECTIVE_ERRNO_H@
+NEXT_AS_FIRST_DIRECTIVE_FCNTL_H = @NEXT_AS_FIRST_DIRECTIVE_FCNTL_H@
+NEXT_AS_FIRST_DIRECTIVE_FLOAT_H = @NEXT_AS_FIRST_DIRECTIVE_FLOAT_H@
+NEXT_AS_FIRST_DIRECTIVE_FNMATCH_H = @NEXT_AS_FIRST_DIRECTIVE_FNMATCH_H@
+NEXT_AS_FIRST_DIRECTIVE_GETOPT_H = @NEXT_AS_FIRST_DIRECTIVE_GETOPT_H@
+NEXT_AS_FIRST_DIRECTIVE_ICONV_H = @NEXT_AS_FIRST_DIRECTIVE_ICONV_H@
+NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H = @NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H@
+NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H = @NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H@
+NEXT_AS_FIRST_DIRECTIVE_LIMITS_H = @NEXT_AS_FIRST_DIRECTIVE_LIMITS_H@
+NEXT_AS_FIRST_DIRECTIVE_LOCALE_H = @NEXT_AS_FIRST_DIRECTIVE_LOCALE_H@
+NEXT_AS_FIRST_DIRECTIVE_NETINET_IN_H = @NEXT_AS_FIRST_DIRECTIVE_NETINET_IN_H@
+NEXT_AS_FIRST_DIRECTIVE_PTHREAD_H = @NEXT_AS_FIRST_DIRECTIVE_PTHREAD_H@
+NEXT_AS_FIRST_DIRECTIVE_SCHED_H = @NEXT_AS_FIRST_DIRECTIVE_SCHED_H@
+NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H = @NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H@
+NEXT_AS_FIRST_DIRECTIVE_STDARG_H = @NEXT_AS_FIRST_DIRECTIVE_STDARG_H@
+NEXT_AS_FIRST_DIRECTIVE_STDDEF_H = @NEXT_AS_FIRST_DIRECTIVE_STDDEF_H@
+NEXT_AS_FIRST_DIRECTIVE_STDINT_H = @NEXT_AS_FIRST_DIRECTIVE_STDINT_H@
+NEXT_AS_FIRST_DIRECTIVE_STDIO_H = @NEXT_AS_FIRST_DIRECTIVE_STDIO_H@
+NEXT_AS_FIRST_DIRECTIVE_STDLIB_H = @NEXT_AS_FIRST_DIRECTIVE_STDLIB_H@
+NEXT_AS_FIRST_DIRECTIVE_STRING_H = @NEXT_AS_FIRST_DIRECTIVE_STRING_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H@
+NEXT_AS_FIRST_DIRECTIVE_TIME_H = @NEXT_AS_FIRST_DIRECTIVE_TIME_H@
+NEXT_AS_FIRST_DIRECTIVE_UNISTD_H = @NEXT_AS_FIRST_DIRECTIVE_UNISTD_H@
+NEXT_AS_FIRST_DIRECTIVE_WCHAR_H = @NEXT_AS_FIRST_DIRECTIVE_WCHAR_H@
+NEXT_AS_FIRST_DIRECTIVE_WCTYPE_H = @NEXT_AS_FIRST_DIRECTIVE_WCTYPE_H@
+NEXT_CTYPE_H = @NEXT_CTYPE_H@
+NEXT_DIRENT_H = @NEXT_DIRENT_H@
+NEXT_ERRNO_H = @NEXT_ERRNO_H@
+NEXT_FCNTL_H = @NEXT_FCNTL_H@
+NEXT_FLOAT_H = @NEXT_FLOAT_H@
+NEXT_FNMATCH_H = @NEXT_FNMATCH_H@
+NEXT_GETOPT_H = @NEXT_GETOPT_H@
+NEXT_ICONV_H = @NEXT_ICONV_H@
+NEXT_INTTYPES_H = @NEXT_INTTYPES_H@
+NEXT_LANGINFO_H = @NEXT_LANGINFO_H@
+NEXT_LIMITS_H = @NEXT_LIMITS_H@
+NEXT_LOCALE_H = @NEXT_LOCALE_H@
+NEXT_NETINET_IN_H = @NEXT_NETINET_IN_H@
+NEXT_PTHREAD_H = @NEXT_PTHREAD_H@
+NEXT_SCHED_H = @NEXT_SCHED_H@
+NEXT_SIGNAL_H = @NEXT_SIGNAL_H@
+NEXT_STDARG_H = @NEXT_STDARG_H@
+NEXT_STDDEF_H = @NEXT_STDDEF_H@
+NEXT_STDINT_H = @NEXT_STDINT_H@
+NEXT_STDIO_H = @NEXT_STDIO_H@
+NEXT_STDLIB_H = @NEXT_STDLIB_H@
+NEXT_STRING_H = @NEXT_STRING_H@
+NEXT_SYS_IOCTL_H = @NEXT_SYS_IOCTL_H@
+NEXT_SYS_SELECT_H = @NEXT_SYS_SELECT_H@
+NEXT_SYS_SOCKET_H = @NEXT_SYS_SOCKET_H@
+NEXT_SYS_STAT_H = @NEXT_SYS_STAT_H@
+NEXT_SYS_TIME_H = @NEXT_SYS_TIME_H@
+NEXT_SYS_TYPES_H = @NEXT_SYS_TYPES_H@
+NEXT_SYS_UIO_H = @NEXT_SYS_UIO_H@
+NEXT_TIME_H = @NEXT_TIME_H@
+NEXT_UNISTD_H = @NEXT_UNISTD_H@
+NEXT_WCHAR_H = @NEXT_WCHAR_H@
+NEXT_WCTYPE_H = @NEXT_WCTYPE_H@
+OBJEXT = @OBJEXT@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_STRING = @PACKAGE_STRING@
+PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+PCRE_CFLAGS = @PCRE_CFLAGS@
+PCRE_LIBS = @PCRE_LIBS@
+PERL = @PERL@
+PKG_CONFIG = @PKG_CONFIG@
+PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@
+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
+POSUB = @POSUB@
+PRAGMA_COLUMNS = @PRAGMA_COLUMNS@
+PRAGMA_SYSTEM_HEADER = @PRAGMA_SYSTEM_HEADER@
+PRIPTR_PREFIX = @PRIPTR_PREFIX@
+PTHREAD_H_DEFINES_STRUCT_TIMESPEC = @PTHREAD_H_DEFINES_STRUCT_TIMESPEC@
+PTRDIFF_T_SUFFIX = @PTRDIFF_T_SUFFIX@
+RANLIB = @RANLIB@
+REPLACE_ACCESS = @REPLACE_ACCESS@
+REPLACE_ALIGNED_ALLOC = @REPLACE_ALIGNED_ALLOC@
+REPLACE_BTOWC = @REPLACE_BTOWC@
+REPLACE_CALLOC = @REPLACE_CALLOC@
+REPLACE_CANONICALIZE_FILE_NAME = @REPLACE_CANONICALIZE_FILE_NAME@
+REPLACE_CHOWN = @REPLACE_CHOWN@
+REPLACE_CLOSE = @REPLACE_CLOSE@
+REPLACE_CLOSEDIR = @REPLACE_CLOSEDIR@
+REPLACE_CREAT = @REPLACE_CREAT@
+REPLACE_CTIME = @REPLACE_CTIME@
+REPLACE_DIRFD = @REPLACE_DIRFD@
+REPLACE_DPRINTF = @REPLACE_DPRINTF@
+REPLACE_DUP = @REPLACE_DUP@
+REPLACE_DUP2 = @REPLACE_DUP2@
+REPLACE_DUPLOCALE = @REPLACE_DUPLOCALE@
+REPLACE_EXECL = @REPLACE_EXECL@
+REPLACE_EXECLE = @REPLACE_EXECLE@
+REPLACE_EXECLP = @REPLACE_EXECLP@
+REPLACE_EXECV = @REPLACE_EXECV@
+REPLACE_EXECVE = @REPLACE_EXECVE@
+REPLACE_EXECVP = @REPLACE_EXECVP@
+REPLACE_EXECVPE = @REPLACE_EXECVPE@
+REPLACE_FACCESSAT = @REPLACE_FACCESSAT@
+REPLACE_FCHMODAT = @REPLACE_FCHMODAT@
+REPLACE_FCHOWNAT = @REPLACE_FCHOWNAT@
+REPLACE_FCLOSE = @REPLACE_FCLOSE@
+REPLACE_FCNTL = @REPLACE_FCNTL@
+REPLACE_FDOPEN = @REPLACE_FDOPEN@
+REPLACE_FDOPENDIR = @REPLACE_FDOPENDIR@
+REPLACE_FFLUSH = @REPLACE_FFLUSH@
+REPLACE_FFSLL = @REPLACE_FFSLL@
+REPLACE_FNMATCH = @REPLACE_FNMATCH@
+REPLACE_FOPEN = @REPLACE_FOPEN@
+REPLACE_FPRINTF = @REPLACE_FPRINTF@
+REPLACE_FPURGE = @REPLACE_FPURGE@
+REPLACE_FREE = @REPLACE_FREE@
+REPLACE_FREELOCALE = @REPLACE_FREELOCALE@
+REPLACE_FREOPEN = @REPLACE_FREOPEN@
+REPLACE_FSEEK = @REPLACE_FSEEK@
+REPLACE_FSEEKO = @REPLACE_FSEEKO@
+REPLACE_FSTAT = @REPLACE_FSTAT@
+REPLACE_FSTATAT = @REPLACE_FSTATAT@
+REPLACE_FTELL = @REPLACE_FTELL@
+REPLACE_FTELLO = @REPLACE_FTELLO@
+REPLACE_FTRUNCATE = @REPLACE_FTRUNCATE@
+REPLACE_FUTIMENS = @REPLACE_FUTIMENS@
+REPLACE_GETCWD = @REPLACE_GETCWD@
+REPLACE_GETDELIM = @REPLACE_GETDELIM@
+REPLACE_GETDOMAINNAME = @REPLACE_GETDOMAINNAME@
+REPLACE_GETDTABLESIZE = @REPLACE_GETDTABLESIZE@
+REPLACE_GETGROUPS = @REPLACE_GETGROUPS@
+REPLACE_GETLINE = @REPLACE_GETLINE@
+REPLACE_GETLOGIN_R = @REPLACE_GETLOGIN_R@
+REPLACE_GETPAGESIZE = @REPLACE_GETPAGESIZE@
+REPLACE_GETPASS = @REPLACE_GETPASS@
+REPLACE_GETTIMEOFDAY = @REPLACE_GETTIMEOFDAY@
+REPLACE_GMTIME = @REPLACE_GMTIME@
+REPLACE_ICONV = @REPLACE_ICONV@
+REPLACE_ICONV_OPEN = @REPLACE_ICONV_OPEN@
+REPLACE_ICONV_UTF = @REPLACE_ICONV_UTF@
+REPLACE_INET_NTOP = @REPLACE_INET_NTOP@
+REPLACE_INET_PTON = @REPLACE_INET_PTON@
+REPLACE_INITSTATE = @REPLACE_INITSTATE@
+REPLACE_IOCTL = @REPLACE_IOCTL@
+REPLACE_ISATTY = @REPLACE_ISATTY@
+REPLACE_ISWBLANK = @REPLACE_ISWBLANK@
+REPLACE_ISWCNTRL = @REPLACE_ISWCNTRL@
+REPLACE_ISWDIGIT = @REPLACE_ISWDIGIT@
+REPLACE_ISWXDIGIT = @REPLACE_ISWXDIGIT@
+REPLACE_ITOLD = @REPLACE_ITOLD@
+REPLACE_LCHOWN = @REPLACE_LCHOWN@
+REPLACE_LINK = @REPLACE_LINK@
+REPLACE_LINKAT = @REPLACE_LINKAT@
+REPLACE_LOCALECONV = @REPLACE_LOCALECONV@
+REPLACE_LOCALTIME = @REPLACE_LOCALTIME@
+REPLACE_LOCALTIME_R = @REPLACE_LOCALTIME_R@
+REPLACE_LSEEK = @REPLACE_LSEEK@
+REPLACE_LSTAT = @REPLACE_LSTAT@
+REPLACE_MALLOC = @REPLACE_MALLOC@
+REPLACE_MBRLEN = @REPLACE_MBRLEN@
+REPLACE_MBRTOWC = @REPLACE_MBRTOWC@
+REPLACE_MBSINIT = @REPLACE_MBSINIT@
+REPLACE_MBSNRTOWCS = @REPLACE_MBSNRTOWCS@
+REPLACE_MBSRTOWCS = @REPLACE_MBSRTOWCS@
+REPLACE_MBSTATE_T = @REPLACE_MBSTATE_T@
+REPLACE_MBTOWC = @REPLACE_MBTOWC@
+REPLACE_MEMCHR = @REPLACE_MEMCHR@
+REPLACE_MEMMEM = @REPLACE_MEMMEM@
+REPLACE_MKDIR = @REPLACE_MKDIR@
+REPLACE_MKFIFO = @REPLACE_MKFIFO@
+REPLACE_MKFIFOAT = @REPLACE_MKFIFOAT@
+REPLACE_MKNOD = @REPLACE_MKNOD@
+REPLACE_MKNODAT = @REPLACE_MKNODAT@
+REPLACE_MKSTEMP = @REPLACE_MKSTEMP@
+REPLACE_MKTIME = @REPLACE_MKTIME@
+REPLACE_NANOSLEEP = @REPLACE_NANOSLEEP@
+REPLACE_NEWLOCALE = @REPLACE_NEWLOCALE@
+REPLACE_NL_LANGINFO = @REPLACE_NL_LANGINFO@
+REPLACE_NULL = @REPLACE_NULL@
+REPLACE_OBSTACK_PRINTF = @REPLACE_OBSTACK_PRINTF@
+REPLACE_OPEN = @REPLACE_OPEN@
+REPLACE_OPENAT = @REPLACE_OPENAT@
+REPLACE_OPENDIR = @REPLACE_OPENDIR@
+REPLACE_PERROR = @REPLACE_PERROR@
+REPLACE_POPEN = @REPLACE_POPEN@
+REPLACE_POSIX_MEMALIGN = @REPLACE_POSIX_MEMALIGN@
+REPLACE_PREAD = @REPLACE_PREAD@
+REPLACE_PRINTF = @REPLACE_PRINTF@
+REPLACE_PSELECT = @REPLACE_PSELECT@
+REPLACE_PTHREAD_ATTR_DESTROY = @REPLACE_PTHREAD_ATTR_DESTROY@
+REPLACE_PTHREAD_ATTR_GETDETACHSTATE = @REPLACE_PTHREAD_ATTR_GETDETACHSTATE@
+REPLACE_PTHREAD_ATTR_INIT = @REPLACE_PTHREAD_ATTR_INIT@
+REPLACE_PTHREAD_ATTR_SETDETACHSTATE = @REPLACE_PTHREAD_ATTR_SETDETACHSTATE@
+REPLACE_PTHREAD_CONDATTR_DESTROY = @REPLACE_PTHREAD_CONDATTR_DESTROY@
+REPLACE_PTHREAD_CONDATTR_INIT = @REPLACE_PTHREAD_CONDATTR_INIT@
+REPLACE_PTHREAD_COND_BROADCAST = @REPLACE_PTHREAD_COND_BROADCAST@
+REPLACE_PTHREAD_COND_DESTROY = @REPLACE_PTHREAD_COND_DESTROY@
+REPLACE_PTHREAD_COND_INIT = @REPLACE_PTHREAD_COND_INIT@
+REPLACE_PTHREAD_COND_SIGNAL = @REPLACE_PTHREAD_COND_SIGNAL@
+REPLACE_PTHREAD_COND_TIMEDWAIT = @REPLACE_PTHREAD_COND_TIMEDWAIT@
+REPLACE_PTHREAD_COND_WAIT = @REPLACE_PTHREAD_COND_WAIT@
+REPLACE_PTHREAD_CREATE = @REPLACE_PTHREAD_CREATE@
+REPLACE_PTHREAD_DETACH = @REPLACE_PTHREAD_DETACH@
+REPLACE_PTHREAD_EQUAL = @REPLACE_PTHREAD_EQUAL@
+REPLACE_PTHREAD_EXIT = @REPLACE_PTHREAD_EXIT@
+REPLACE_PTHREAD_GETSPECIFIC = @REPLACE_PTHREAD_GETSPECIFIC@
+REPLACE_PTHREAD_JOIN = @REPLACE_PTHREAD_JOIN@
+REPLACE_PTHREAD_KEY_CREATE = @REPLACE_PTHREAD_KEY_CREATE@
+REPLACE_PTHREAD_KEY_DELETE = @REPLACE_PTHREAD_KEY_DELETE@
+REPLACE_PTHREAD_MUTEXATTR_DESTROY = @REPLACE_PTHREAD_MUTEXATTR_DESTROY@
+REPLACE_PTHREAD_MUTEXATTR_GETROBUST = @REPLACE_PTHREAD_MUTEXATTR_GETROBUST@
+REPLACE_PTHREAD_MUTEXATTR_GETTYPE = @REPLACE_PTHREAD_MUTEXATTR_GETTYPE@
+REPLACE_PTHREAD_MUTEXATTR_INIT = @REPLACE_PTHREAD_MUTEXATTR_INIT@
+REPLACE_PTHREAD_MUTEXATTR_SETROBUST = @REPLACE_PTHREAD_MUTEXATTR_SETROBUST@
+REPLACE_PTHREAD_MUTEXATTR_SETTYPE = @REPLACE_PTHREAD_MUTEXATTR_SETTYPE@
+REPLACE_PTHREAD_MUTEX_DESTROY = @REPLACE_PTHREAD_MUTEX_DESTROY@
+REPLACE_PTHREAD_MUTEX_INIT = @REPLACE_PTHREAD_MUTEX_INIT@
+REPLACE_PTHREAD_MUTEX_LOCK = @REPLACE_PTHREAD_MUTEX_LOCK@
+REPLACE_PTHREAD_MUTEX_TIMEDLOCK = @REPLACE_PTHREAD_MUTEX_TIMEDLOCK@
+REPLACE_PTHREAD_MUTEX_TRYLOCK = @REPLACE_PTHREAD_MUTEX_TRYLOCK@
+REPLACE_PTHREAD_MUTEX_UNLOCK = @REPLACE_PTHREAD_MUTEX_UNLOCK@
+REPLACE_PTHREAD_ONCE = @REPLACE_PTHREAD_ONCE@
+REPLACE_PTHREAD_RWLOCKATTR_DESTROY = @REPLACE_PTHREAD_RWLOCKATTR_DESTROY@
+REPLACE_PTHREAD_RWLOCKATTR_INIT = @REPLACE_PTHREAD_RWLOCKATTR_INIT@
+REPLACE_PTHREAD_RWLOCK_DESTROY = @REPLACE_PTHREAD_RWLOCK_DESTROY@
+REPLACE_PTHREAD_RWLOCK_INIT = @REPLACE_PTHREAD_RWLOCK_INIT@
+REPLACE_PTHREAD_RWLOCK_RDLOCK = @REPLACE_PTHREAD_RWLOCK_RDLOCK@
+REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK = @REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK@
+REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK = @REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK@
+REPLACE_PTHREAD_RWLOCK_TRYRDLOCK = @REPLACE_PTHREAD_RWLOCK_TRYRDLOCK@
+REPLACE_PTHREAD_RWLOCK_TRYWRLOCK = @REPLACE_PTHREAD_RWLOCK_TRYWRLOCK@
+REPLACE_PTHREAD_RWLOCK_UNLOCK = @REPLACE_PTHREAD_RWLOCK_UNLOCK@
+REPLACE_PTHREAD_RWLOCK_WRLOCK = @REPLACE_PTHREAD_RWLOCK_WRLOCK@
+REPLACE_PTHREAD_SELF = @REPLACE_PTHREAD_SELF@
+REPLACE_PTHREAD_SETSPECIFIC = @REPLACE_PTHREAD_SETSPECIFIC@
+REPLACE_PTHREAD_SIGMASK = @REPLACE_PTHREAD_SIGMASK@
+REPLACE_PTHREAD_SPIN_DESTROY = @REPLACE_PTHREAD_SPIN_DESTROY@
+REPLACE_PTHREAD_SPIN_INIT = @REPLACE_PTHREAD_SPIN_INIT@
+REPLACE_PTHREAD_SPIN_LOCK = @REPLACE_PTHREAD_SPIN_LOCK@
+REPLACE_PTHREAD_SPIN_TRYLOCK = @REPLACE_PTHREAD_SPIN_TRYLOCK@
+REPLACE_PTHREAD_SPIN_UNLOCK = @REPLACE_PTHREAD_SPIN_UNLOCK@
+REPLACE_PTSNAME = @REPLACE_PTSNAME@
+REPLACE_PTSNAME_R = @REPLACE_PTSNAME_R@
+REPLACE_PUTENV = @REPLACE_PUTENV@
+REPLACE_PWRITE = @REPLACE_PWRITE@
+REPLACE_QSORT_R = @REPLACE_QSORT_R@
+REPLACE_RAISE = @REPLACE_RAISE@
+REPLACE_RANDOM = @REPLACE_RANDOM@
+REPLACE_RANDOM_R = @REPLACE_RANDOM_R@
+REPLACE_READ = @REPLACE_READ@
+REPLACE_READLINK = @REPLACE_READLINK@
+REPLACE_READLINKAT = @REPLACE_READLINKAT@
+REPLACE_REALLOC = @REPLACE_REALLOC@
+REPLACE_REALLOCARRAY = @REPLACE_REALLOCARRAY@
+REPLACE_REALPATH = @REPLACE_REALPATH@
+REPLACE_REMOVE = @REPLACE_REMOVE@
+REPLACE_RENAME = @REPLACE_RENAME@
+REPLACE_RENAMEAT = @REPLACE_RENAMEAT@
+REPLACE_RMDIR = @REPLACE_RMDIR@
+REPLACE_SCHED_YIELD = @REPLACE_SCHED_YIELD@
+REPLACE_SELECT = @REPLACE_SELECT@
+REPLACE_SETENV = @REPLACE_SETENV@
+REPLACE_SETLOCALE = @REPLACE_SETLOCALE@
+REPLACE_SETSTATE = @REPLACE_SETSTATE@
+REPLACE_SLEEP = @REPLACE_SLEEP@
+REPLACE_SNPRINTF = @REPLACE_SNPRINTF@
+REPLACE_SPRINTF = @REPLACE_SPRINTF@
+REPLACE_STAT = @REPLACE_STAT@
+REPLACE_STDIO_READ_FUNCS = @REPLACE_STDIO_READ_FUNCS@
+REPLACE_STDIO_WRITE_FUNCS = @REPLACE_STDIO_WRITE_FUNCS@
+REPLACE_STPNCPY = @REPLACE_STPNCPY@
+REPLACE_STRCASESTR = @REPLACE_STRCASESTR@
+REPLACE_STRCHRNUL = @REPLACE_STRCHRNUL@
+REPLACE_STRDUP = @REPLACE_STRDUP@
+REPLACE_STRERROR = @REPLACE_STRERROR@
+REPLACE_STRERRORNAME_NP = @REPLACE_STRERRORNAME_NP@
+REPLACE_STRERROR_R = @REPLACE_STRERROR_R@
+REPLACE_STRFTIME = @REPLACE_STRFTIME@
+REPLACE_STRNCAT = @REPLACE_STRNCAT@
+REPLACE_STRNDUP = @REPLACE_STRNDUP@
+REPLACE_STRNLEN = @REPLACE_STRNLEN@
+REPLACE_STRSIGNAL = @REPLACE_STRSIGNAL@
+REPLACE_STRSTR = @REPLACE_STRSTR@
+REPLACE_STRTOD = @REPLACE_STRTOD@
+REPLACE_STRTOIMAX = @REPLACE_STRTOIMAX@
+REPLACE_STRTOK_R = @REPLACE_STRTOK_R@
+REPLACE_STRTOL = @REPLACE_STRTOL@
+REPLACE_STRTOLD = @REPLACE_STRTOLD@
+REPLACE_STRTOLL = @REPLACE_STRTOLL@
+REPLACE_STRTOUL = @REPLACE_STRTOUL@
+REPLACE_STRTOULL = @REPLACE_STRTOULL@
+REPLACE_STRTOUMAX = @REPLACE_STRTOUMAX@
+REPLACE_STRUCT_LCONV = @REPLACE_STRUCT_LCONV@
+REPLACE_STRUCT_TIMEVAL = @REPLACE_STRUCT_TIMEVAL@
+REPLACE_SYMLINK = @REPLACE_SYMLINK@
+REPLACE_SYMLINKAT = @REPLACE_SYMLINKAT@
+REPLACE_TIMEGM = @REPLACE_TIMEGM@
+REPLACE_TMPFILE = @REPLACE_TMPFILE@
+REPLACE_TOWLOWER = @REPLACE_TOWLOWER@
+REPLACE_TRUNCATE = @REPLACE_TRUNCATE@
+REPLACE_TTYNAME_R = @REPLACE_TTYNAME_R@
+REPLACE_TZSET = @REPLACE_TZSET@
+REPLACE_UNLINK = @REPLACE_UNLINK@
+REPLACE_UNLINKAT = @REPLACE_UNLINKAT@
+REPLACE_UNSETENV = @REPLACE_UNSETENV@
+REPLACE_USLEEP = @REPLACE_USLEEP@
+REPLACE_UTIMENSAT = @REPLACE_UTIMENSAT@
+REPLACE_VASPRINTF = @REPLACE_VASPRINTF@
+REPLACE_VDPRINTF = @REPLACE_VDPRINTF@
+REPLACE_VFPRINTF = @REPLACE_VFPRINTF@
+REPLACE_VPRINTF = @REPLACE_VPRINTF@
+REPLACE_VSNPRINTF = @REPLACE_VSNPRINTF@
+REPLACE_VSPRINTF = @REPLACE_VSPRINTF@
+REPLACE_WCRTOMB = @REPLACE_WCRTOMB@
+REPLACE_WCSFTIME = @REPLACE_WCSFTIME@
+REPLACE_WCSNRTOMBS = @REPLACE_WCSNRTOMBS@
+REPLACE_WCSRTOMBS = @REPLACE_WCSRTOMBS@
+REPLACE_WCSTOK = @REPLACE_WCSTOK@
+REPLACE_WCSWIDTH = @REPLACE_WCSWIDTH@
+REPLACE_WCTOB = @REPLACE_WCTOB@
+REPLACE_WCTOMB = @REPLACE_WCTOMB@
+REPLACE_WCWIDTH = @REPLACE_WCWIDTH@
+REPLACE_WRITE = @REPLACE_WRITE@
+SED = @SED@
+SET_MAKE = @SET_MAKE@
+SHELL = @SHELL@
+SIGSEGV_H = @SIGSEGV_H@
+SIG_ATOMIC_T_SUFFIX = @SIG_ATOMIC_T_SUFFIX@
+SIZE_T_SUFFIX = @SIZE_T_SUFFIX@
+STDALIGN_H = @STDALIGN_H@
+STDARG_H = @STDARG_H@
+STDBOOL_H = @STDBOOL_H@
+STDDEF_H = @STDDEF_H@
+STDINT_H = @STDINT_H@
+STRIP = @STRIP@
+SYS_IOCTL_H_HAVE_WINSOCK2_H = @SYS_IOCTL_H_HAVE_WINSOCK2_H@
+SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS = @SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
+SYS_TIME_H_DEFINES_STRUCT_TIMESPEC = @SYS_TIME_H_DEFINES_STRUCT_TIMESPEC@
+TIME_H_DEFINES_STRUCT_TIMESPEC = @TIME_H_DEFINES_STRUCT_TIMESPEC@
+TIME_H_DEFINES_TIME_UTC = @TIME_H_DEFINES_TIME_UTC@
+UINT32_MAX_LT_UINTMAX_MAX = @UINT32_MAX_LT_UINTMAX_MAX@
+UINT64_MAX_EQ_ULONG_MAX = @UINT64_MAX_EQ_ULONG_MAX@
+UNDEFINE_STRTOK_R = @UNDEFINE_STRTOK_R@
+UNISTD_H_DEFINES_STRUCT_TIMESPEC = @UNISTD_H_DEFINES_STRUCT_TIMESPEC@
+UNISTD_H_HAVE_SYS_RANDOM_H = @UNISTD_H_HAVE_SYS_RANDOM_H@
+UNISTD_H_HAVE_WINSOCK2_H = @UNISTD_H_HAVE_WINSOCK2_H@
+UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS = @UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
+USE_NLS = @USE_NLS@
+VERSION = @VERSION@
+WARN_CFLAGS = @WARN_CFLAGS@
+WCHAR_T_SUFFIX = @WCHAR_T_SUFFIX@
+WERROR_CFLAGS = @WERROR_CFLAGS@
+WINDOWS_64_BIT_OFF_T = @WINDOWS_64_BIT_OFF_T@
+WINDOWS_64_BIT_ST_SIZE = @WINDOWS_64_BIT_ST_SIZE@
+WINDOWS_STAT_INODES = @WINDOWS_STAT_INODES@
+WINDOWS_STAT_TIMESPEC = @WINDOWS_STAT_TIMESPEC@
+WINT_T_SUFFIX = @WINT_T_SUFFIX@
+XGETTEXT = @XGETTEXT@
+XGETTEXT_015 = @XGETTEXT_015@
+XGETTEXT_EXTRA_OPTIONS = @XGETTEXT_EXTRA_OPTIONS@
+abs_aux_dir = @abs_aux_dir@
+abs_builddir = @abs_builddir@
+abs_srcdir = @abs_srcdir@
+abs_top_builddir = @abs_top_builddir@
+abs_top_srcdir = @abs_top_srcdir@
+ac_ct_CC = @ac_ct_CC@
+am__include = @am__include@
+am__leading_dot = @am__leading_dot@
+am__quote = @am__quote@
+am__tar = @am__tar@
+am__untar = @am__untar@
+bindir = @bindir@
+build = @build@
+build_alias = @build_alias@
+build_cpu = @build_cpu@
+build_os = @build_os@
+build_vendor = @build_vendor@
+builddir = @builddir@
+datadir = @datadir@
+datarootdir = @datarootdir@
+docdir = @docdir@
+dvidir = @dvidir@
+exec_prefix = @exec_prefix@
+gl_LIBOBJS = @gl_LIBOBJS@
+gl_LTLIBOBJS = @gl_LTLIBOBJS@
+gltests_LIBOBJS = @gltests_LIBOBJS@
+gltests_LTLIBOBJS = @gltests_LTLIBOBJS@
+gltests_WITNESS = @gltests_WITNESS@
+host = @host@
+host_alias = @host_alias@
+host_cpu = @host_cpu@
+host_os = @host_os@
+host_vendor = @host_vendor@
+htmldir = @htmldir@
+includedir = @includedir@
+infodir = @infodir@
+install_sh = @install_sh@
+libdir = @libdir@
+libexecdir = @libexecdir@
+lispdir = @lispdir@
+localedir = @localedir@
+localstatedir = @localstatedir@
+mandir = @mandir@
+mkdir_p = @mkdir_p@
+oldincludedir = @oldincludedir@
+pdfdir = @pdfdir@
+prefix = @prefix@
+program_transform_name = @program_transform_name@
+psdir = @psdir@
+runstatedir = @runstatedir@
+sbindir = @sbindir@
+sharedstatedir = @sharedstatedir@
+srcdir = @srcdir@
+sysconfdir = @sysconfdir@
+target_alias = @target_alias@
+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+TEST_EXTENSIONS = .sh .pl
+@HAVE_PERL_FALSE@TESTSUITE_PERL = $(SHELL) $(srcdir)/no-perl
+@HAVE_PERL_TRUE@TESTSUITE_PERL = $(PERL)
+
+# Options passed to the perl invocations running the perl test scripts.
+# '$f' is set by the Automake-generated test harness to the path of the
+# current test script stripped of VPATH components, and is used by the
+# CuTmpdir module to determine the name of the temporary files to be
+# used.  Note that $f is a shell variable, not a make macro, so the use
+# of '$$f' below is correct, and not a typo.
+TESTSUITE_PERL_OPTIONS = -w -I$(srcdir) -MCoreutils -MCuSkip \
+	-M"CuTmpdir qw($$f)"
+SH_LOG_COMPILER = $(SHELL)
+PL_LOG_COMPILER = $(TESTSUITE_PERL) $(TESTSUITE_PERL_OPTIONS)
+AM_CPPFLAGS = -I$(top_builddir)/lib -I$(top_srcdir)/lib \
+  -I$(top_srcdir)/src
+
+AM_CFLAGS = $(WARN_CFLAGS) $(WERROR_CFLAGS)
+
+# Tell the linker to omit references to unused shared libraries.
+AM_LDFLAGS = $(IGNORE_UNUSED_LIBRARIES_CFLAGS)
+LDADD = ../lib/libgreputils.a $(LIBINTL) ../lib/libgreputils.a
+
+# The triple-backref test is expected to fail with both the system
+# matcher (i.e., with glibc) and with the included matcher.
+# Both matchers need to be fixed.
+# FIXME-2015: Remove this once the glibc and gnulib bugs are fixed.
+XFAIL_TESTS = triple-backref $(am__append_1)
+# The backref-alt test fails for glibc 2.27 and earlier.
+# If you're using older glibc you can upgrade to glibc 2.28 or later,
+# configure --with-included-regex, or ignore the test failure.
+TESTS = \
+  backref					\
+  backref-alt					\
+  backref-multibyte-slow			\
+  backref-word					\
+  backslash-dot					\
+  backslash-s-and-repetition-operators		\
+  backslash-s-vs-invalid-multibyte		\
+  big-hole					\
+  big-match					\
+  binary-file-matches				\
+  bogus-wctob					\
+  bre						\
+  c-locale					\
+  case-fold-backref				\
+  case-fold-backslash-w				\
+  case-fold-char-class				\
+  case-fold-char-range				\
+  case-fold-char-type				\
+  case-fold-titlecase				\
+  char-class-multibyte				\
+  char-class-multibyte2				\
+  context-0					\
+  count-newline					\
+  dfa-coverage					\
+  dfa-heap-overrun				\
+  dfa-infloop					\
+  dfa-invalid-utf8				\
+  dfaexec-multibyte				\
+  empty						\
+  empty-line					\
+  empty-line-mb					\
+  encoding-error				\
+  epipe						\
+  equiv-classes					\
+  ere						\
+  euc-mb					\
+  false-match-mb-non-utf8			\
+  fedora					\
+  fgrep-infloop					\
+  fgrep-longest					\
+  file						\
+  filename-lineno.pl				\
+  fmbtest					\
+  foad1						\
+  grep-dev-null					\
+  grep-dev-null-out				\
+  grep-dir					\
+  hash-collision-perf				\
+  help-version					\
+  high-bit-range				\
+  in-eq-out-infloop				\
+  include-exclude				\
+  inconsistent-range				\
+  initial-tab					\
+  invalid-multibyte-infloop			\
+  khadafy					\
+  kwset-abuse					\
+  long-line-vs-2GiB-read			\
+  long-pattern-perf				\
+  many-regex-performance			\
+  match-lines					\
+  max-count-overread				\
+  max-count-vs-context				\
+  mb-dot-newline				\
+  mb-non-UTF8-overrun				\
+  mb-non-UTF8-perf-Fw				\
+  mb-non-UTF8-performance			\
+  mb-non-UTF8-word-boundary			\
+  multibyte-white-space				\
+  multiple-begin-or-end-line			\
+  null-byte					\
+  options					\
+  pcre						\
+  pcre-abort					\
+  pcre-context					\
+  pcre-count					\
+  pcre-infloop					\
+  pcre-invalid-utf8-infloop			\
+  pcre-invalid-utf8-input			\
+  pcre-jitstack					\
+  pcre-o					\
+  pcre-utf8					\
+  pcre-w					\
+  pcre-wx-backref				\
+  pcre-z					\
+  posix-bracket					\
+  prefix-of-multibyte				\
+  proc						\
+  r-dot						\
+  repetition-overflow				\
+  reversed-range-endpoints			\
+  sjis-mb					\
+  skip-device					\
+  skip-read					\
+  spencer1					\
+  spencer1-locale				\
+  stack-overflow				\
+  status					\
+  surrogate-pair				\
+  symlink					\
+  triple-backref				\
+  turkish-I					\
+  turkish-I-without-dot				\
+  turkish-eyes					\
+  two-chars					\
+  two-files					\
+  unibyte-binary				\
+  unibyte-bracket-expr				\
+  unibyte-negated-circumflex			\
+  utf8-bracket					\
+  warn-char-classes				\
+  word-delim-multibyte				\
+  word-multi-file				\
+  word-multibyte				\
+  write-error-msg				\
+  yesno						\
+  z-anchor-newline
+
+EXTRA_DIST = \
+  $(TESTS)					\
+  bre.awk					\
+  bre.tests					\
+  Coreutils.pm					\
+  CuSkip.pm					\
+  CuTmpdir.pm					\
+  envvar-check					\
+  ere.awk					\
+  ere.tests					\
+  init.cfg					\
+  init.sh					\
+  khadafy.lines					\
+  khadafy.regexp				\
+  no-perl					\
+  spencer1.awk					\
+  spencer1.tests				\
+  spencer1-locale.awk
+
+
+# Default to a nonzero value.  Environment overrides.
+# https://udrepper.livejournal.com/11429.html
+MALLOC_PERTURB_ = 1
+TESTS_ENVIRONMENT = \
+  tmp__=$${TMPDIR-/tmp};			\
+  test -d "$$tmp__" && test -w "$$tmp__" || tmp__=.;	\
+  . $(srcdir)/envvar-check;			\
+  TMPDIR=$$tmp__; export TMPDIR;		\
+						\
+  if test -n "$$BASH_VERSION" || (eval "export v=x") 2>/dev/null; then \
+    export_with_values () { export "$$@"; };		\
+  else							\
+    export_with_values ()				\
+    {							\
+      sed_extract_var='s/=.*//';			\
+      sed_quote_value="s/'/'\\\\''/g;s/=\\(.*\\)/='\\1'/";\
+      for arg in "$$@"; do				\
+        var=`echo "$$arg" | sed "$$sed_extract_var"`;	\
+        arg=`echo "$$arg" | sed "$$sed_quote_value"`;	\
+        eval "$$arg";					\
+        export "$$var";					\
+      done;						\
+    };							\
+  fi;							\
+							\
+  : 'Test egrep/fgrep help if they use our grep.';	\
+  grep=`echo grep | sed -e '$(transform)'` || exit;	\
+  if test "$$grep" = grep; then				\
+    built_programs='grep egrep fgrep';			\
+  else							\
+    built_programs='grep';				\
+  fi;							\
+						\
+  export_with_values				\
+  VERSION='$(VERSION)'				\
+  LOCALE_FR='$(LOCALE_FR)'			\
+  LOCALE_FR_UTF8='$(LOCALE_FR_UTF8)'		\
+  AWK=$(AWK)					\
+  LC_ALL=C					\
+  abs_top_builddir='$(abs_top_builddir)'	\
+  abs_top_srcdir='$(abs_top_srcdir)'		\
+  abs_srcdir='$(abs_srcdir)'			\
+  built_programs="$$built_programs"		\
+  host_triplet='$(host_triplet)'		\
+  srcdir='$(srcdir)'				\
+  top_srcdir='$(top_srcdir)'			\
+  CC='$(CC)'					\
+  GREP_TEST_NAME=`echo $$tst|sed 's,^\./,,;s,/,-,g'` \
+  MAKE=$(MAKE)					\
+  MALLOC_PERTURB_=$(MALLOC_PERTURB_)		\
+  PACKAGE_BUGREPORT='$(PACKAGE_BUGREPORT)'	\
+  PACKAGE_VERSION=$(PACKAGE_VERSION)		\
+  PERL='$(PERL)'				\
+  SHELL='$(SHELL)'				\
+  PATH='$(abs_top_builddir)/src$(PATH_SEPARATOR)'"$$PATH" \
+  ;						\
+						\
+  : 'set this envvar to indicate whether -P works';	\
+  m=0; if err=`echo .|grep -Pq . 2>&1`; then		\
+    test -z "$$err" && m=1; fi;				\
+  export PCRE_WORKS=$$m;				\
+  9>&2
+
+LOG_COMPILER = $(SHELL)
+VERBOSE = yes
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .log .o .obj .pl .pl$(EXEEXT) .sh .sh$(EXEEXT) .trs
+$(srcdir)/Makefile.in:  $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu tests/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu tests/Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure:  $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4):  $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+clean-checkPROGRAMS:
+	-test -z "$(check_PROGRAMS)" || rm -f $(check_PROGRAMS)
+
+get-mb-cur-max$(EXEEXT): $(get_mb_cur_max_OBJECTS) $(get_mb_cur_max_DEPENDENCIES) $(EXTRA_get_mb_cur_max_DEPENDENCIES) 
+	@rm -f get-mb-cur-max$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(get_mb_cur_max_OBJECTS) $(get_mb_cur_max_LDADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/get-mb-cur-max.Po@am__quote@ # am--include-marker
+
+$(am__depfiles_remade):
+	@$(MKDIR_P) $(@D)
+	@echo '# dummy' >$@-t && $(am__mv) $@-t $@
+
+am--depfiles: $(am__depfiles_remade)
+
+.c.o:
+@am__fastdepCC_TRUE@	$(AM_V_CC)depbase=`echo $@ | sed 's|[^/]*$$|$(DEPDIR)/&|;s|\.o$$||'`;\
+@am__fastdepCC_TRUE@	$(COMPILE) -MT $@ -MD -MP -MF $$depbase.Tpo -c -o $@ $< &&\
+@am__fastdepCC_TRUE@	$(am__mv) $$depbase.Tpo $$depbase.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(COMPILE) -c -o $@ $<
+
+.c.obj:
+@am__fastdepCC_TRUE@	$(AM_V_CC)depbase=`echo $@ | sed 's|[^/]*$$|$(DEPDIR)/&|;s|\.obj$$||'`;\
+@am__fastdepCC_TRUE@	$(COMPILE) -MT $@ -MD -MP -MF $$depbase.Tpo -c -o $@ `$(CYGPATH_W) '$<'` &&\
+@am__fastdepCC_TRUE@	$(am__mv) $$depbase.Tpo $$depbase.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(COMPILE) -c -o $@ `$(CYGPATH_W) '$<'`
+
+ID: $(am__tagged_files)
+	$(am__define_uniq_tagged_files); mkid -fID $$unique
+tags: tags-am
+TAGS: tags
+
+tags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	set x; \
+	here=`pwd`; \
+	$(am__define_uniq_tagged_files); \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: ctags-am
+
+CTAGS: ctags
+ctags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	$(am__define_uniq_tagged_files); \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+cscopelist: cscopelist-am
+
+cscopelist-am: $(am__tagged_files)
+	list='$(am__tagged_files)'; \
+	case "$(srcdir)" in \
+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+# Recover from deleted '.trs' file; this should ensure that
+# "rm -f foo.log; make foo.trs" re-run 'foo.test', and re-create
+# both 'foo.log' and 'foo.trs'.  Break the recipe in two subshells
+# to avoid problems with "make -n".
+.log.trs:
+	rm -f $< $@
+	$(MAKE) $(AM_MAKEFLAGS) $<
+
+# Leading 'am--fnord' is there to ensure the list of targets does not
+# expand to empty, as could happen e.g. with make check TESTS=''.
+am--fnord $(TEST_LOGS) $(TEST_LOGS:.log=.trs): $(am__force_recheck)
+am--force-recheck:
+	@:
+
+$(TEST_SUITE_LOG): $(TEST_LOGS)
+	@$(am__set_TESTS_bases); \
+	am__f_ok () { test -f "$$1" && test -r "$$1"; }; \
+	redo_bases=`for i in $$bases; do \
+	              am__f_ok $$i.trs && am__f_ok $$i.log || echo $$i; \
+	            done`; \
+	if test -n "$$redo_bases"; then \
+	  redo_logs=`for i in $$redo_bases; do echo $$i.log; done`; \
+	  redo_results=`for i in $$redo_bases; do echo $$i.trs; done`; \
+	  if $(am__make_dryrun); then :; else \
+	    rm -f $$redo_logs && rm -f $$redo_results || exit 1; \
+	  fi; \
+	fi; \
+	if test -n "$$am__remaking_logs"; then \
+	  echo "fatal: making $(TEST_SUITE_LOG): possible infinite" \
+	       "recursion detected" >&2; \
+	elif test -n "$$redo_logs"; then \
+	  am__remaking_logs=yes $(MAKE) $(AM_MAKEFLAGS) $$redo_logs; \
+	fi; \
+	if $(am__make_dryrun); then :; else \
+	  st=0;  \
+	  errmsg="fatal: making $(TEST_SUITE_LOG): failed to create"; \
+	  for i in $$redo_bases; do \
+	    test -f $$i.trs && test -r $$i.trs \
+	      || { echo "$$errmsg $$i.trs" >&2; st=1; }; \
+	    test -f $$i.log && test -r $$i.log \
+	      || { echo "$$errmsg $$i.log" >&2; st=1; }; \
+	  done; \
+	  test $$st -eq 0 || exit 1; \
+	fi
+	@$(am__sh_e_setup); $(am__tty_colors); $(am__set_TESTS_bases); \
+	ws='[ 	]'; \
+	results=`for b in $$bases; do echo $$b.trs; done`; \
+	test -n "$$results" || results=/dev/null; \
+	all=`  grep "^$$ws*:test-result:"           $$results | wc -l`; \
+	pass=` grep "^$$ws*:test-result:$$ws*PASS"  $$results | wc -l`; \
+	fail=` grep "^$$ws*:test-result:$$ws*FAIL"  $$results | wc -l`; \
+	skip=` grep "^$$ws*:test-result:$$ws*SKIP"  $$results | wc -l`; \
+	xfail=`grep "^$$ws*:test-result:$$ws*XFAIL" $$results | wc -l`; \
+	xpass=`grep "^$$ws*:test-result:$$ws*XPASS" $$results | wc -l`; \
+	error=`grep "^$$ws*:test-result:$$ws*ERROR" $$results | wc -l`; \
+	if test `expr $$fail + $$xpass + $$error` -eq 0; then \
+	  success=true; \
+	else \
+	  success=false; \
+	fi; \
+	br='==================='; br=$$br$$br$$br$$br; \
+	result_count () \
+	{ \
+	    if test x"$$1" = x"--maybe-color"; then \
+	      maybe_colorize=yes; \
+	    elif test x"$$1" = x"--no-color"; then \
+	      maybe_colorize=no; \
+	    else \
+	      echo "$@: invalid 'result_count' usage" >&2; exit 4; \
+	    fi; \
+	    shift; \
+	    desc=$$1 count=$$2; \
+	    if test $$maybe_colorize = yes && test $$count -gt 0; then \
+	      color_start=$$3 color_end=$$std; \
+	    else \
+	      color_start= color_end=; \
+	    fi; \
+	    echo "$${color_start}# $$desc $$count$${color_end}"; \
+	}; \
+	create_testsuite_report () \
+	{ \
+	  result_count $$1 "TOTAL:" $$all   "$$brg"; \
+	  result_count $$1 "PASS: " $$pass  "$$grn"; \
+	  result_count $$1 "SKIP: " $$skip  "$$blu"; \
+	  result_count $$1 "XFAIL:" $$xfail "$$lgn"; \
+	  result_count $$1 "FAIL: " $$fail  "$$red"; \
+	  result_count $$1 "XPASS:" $$xpass "$$red"; \
+	  result_count $$1 "ERROR:" $$error "$$mgn"; \
+	}; \
+	{								\
+	  echo "$(PACKAGE_STRING): $(subdir)/$(TEST_SUITE_LOG)" |	\
+	    $(am__rst_title);						\
+	  create_testsuite_report --no-color;				\
+	  echo;								\
+	  echo ".. contents:: :depth: 2";				\
+	  echo;								\
+	  for b in $$bases; do echo $$b; done				\
+	    | $(am__create_global_log);					\
+	} >$(TEST_SUITE_LOG).tmp || exit 1;				\
+	mv $(TEST_SUITE_LOG).tmp $(TEST_SUITE_LOG);			\
+	if $$success; then						\
+	  col="$$grn";							\
+	 else								\
+	  col="$$red";							\
+	  test x"$$VERBOSE" = x || cat $(TEST_SUITE_LOG);		\
+	fi;								\
+	echo "$${col}$$br$${std}"; 					\
+	echo "$${col}Testsuite summary"$(AM_TESTSUITE_SUMMARY_HEADER)"$${std}";	\
+	echo "$${col}$$br$${std}"; 					\
+	create_testsuite_report --maybe-color;				\
+	echo "$$col$$br$$std";						\
+	if $$success; then :; else					\
+	  echo "$${col}See $(subdir)/$(TEST_SUITE_LOG)$${std}";		\
+	  if test -n "$(PACKAGE_BUGREPORT)"; then			\
+	    echo "$${col}Please report to $(PACKAGE_BUGREPORT)$${std}";	\
+	  fi;								\
+	  echo "$$col$$br$$std";					\
+	fi;								\
+	$$success || exit 1
+
+check-TESTS: $(check_PROGRAMS)
+	@list='$(RECHECK_LOGS)';           test -z "$$list" || rm -f $$list
+	@list='$(RECHECK_LOGS:.log=.trs)'; test -z "$$list" || rm -f $$list
+	@test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
+	@set +e; $(am__set_TESTS_bases); \
+	log_list=`for i in $$bases; do echo $$i.log; done`; \
+	trs_list=`for i in $$bases; do echo $$i.trs; done`; \
+	log_list=`echo $$log_list`; trs_list=`echo $$trs_list`; \
+	$(MAKE) $(AM_MAKEFLAGS) $(TEST_SUITE_LOG) TEST_LOGS="$$log_list"; \
+	exit $$?;
+recheck: all $(check_PROGRAMS)
+	@test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
+	@set +e; $(am__set_TESTS_bases); \
+	bases=`for i in $$bases; do echo $$i; done \
+	         | $(am__list_recheck_tests)` || exit 1; \
+	log_list=`for i in $$bases; do echo $$i.log; done`; \
+	log_list=`echo $$log_list`; \
+	$(MAKE) $(AM_MAKEFLAGS) $(TEST_SUITE_LOG) \
+	        am__force_recheck=am--force-recheck \
+	        TEST_LOGS="$$log_list"; \
+	exit $$?
+backref.log: backref
+	@p='backref'; \
+	b='backref'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+backref-alt.log: backref-alt
+	@p='backref-alt'; \
+	b='backref-alt'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+backref-multibyte-slow.log: backref-multibyte-slow
+	@p='backref-multibyte-slow'; \
+	b='backref-multibyte-slow'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+backref-word.log: backref-word
+	@p='backref-word'; \
+	b='backref-word'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+backslash-dot.log: backslash-dot
+	@p='backslash-dot'; \
+	b='backslash-dot'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+backslash-s-and-repetition-operators.log: backslash-s-and-repetition-operators
+	@p='backslash-s-and-repetition-operators'; \
+	b='backslash-s-and-repetition-operators'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+backslash-s-vs-invalid-multibyte.log: backslash-s-vs-invalid-multibyte
+	@p='backslash-s-vs-invalid-multibyte'; \
+	b='backslash-s-vs-invalid-multibyte'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+big-hole.log: big-hole
+	@p='big-hole'; \
+	b='big-hole'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+big-match.log: big-match
+	@p='big-match'; \
+	b='big-match'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+binary-file-matches.log: binary-file-matches
+	@p='binary-file-matches'; \
+	b='binary-file-matches'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+bogus-wctob.log: bogus-wctob
+	@p='bogus-wctob'; \
+	b='bogus-wctob'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+bre.log: bre
+	@p='bre'; \
+	b='bre'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+c-locale.log: c-locale
+	@p='c-locale'; \
+	b='c-locale'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+case-fold-backref.log: case-fold-backref
+	@p='case-fold-backref'; \
+	b='case-fold-backref'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+case-fold-backslash-w.log: case-fold-backslash-w
+	@p='case-fold-backslash-w'; \
+	b='case-fold-backslash-w'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+case-fold-char-class.log: case-fold-char-class
+	@p='case-fold-char-class'; \
+	b='case-fold-char-class'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+case-fold-char-range.log: case-fold-char-range
+	@p='case-fold-char-range'; \
+	b='case-fold-char-range'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+case-fold-char-type.log: case-fold-char-type
+	@p='case-fold-char-type'; \
+	b='case-fold-char-type'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+case-fold-titlecase.log: case-fold-titlecase
+	@p='case-fold-titlecase'; \
+	b='case-fold-titlecase'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+char-class-multibyte.log: char-class-multibyte
+	@p='char-class-multibyte'; \
+	b='char-class-multibyte'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+char-class-multibyte2.log: char-class-multibyte2
+	@p='char-class-multibyte2'; \
+	b='char-class-multibyte2'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+context-0.log: context-0
+	@p='context-0'; \
+	b='context-0'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+count-newline.log: count-newline
+	@p='count-newline'; \
+	b='count-newline'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+dfa-coverage.log: dfa-coverage
+	@p='dfa-coverage'; \
+	b='dfa-coverage'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+dfa-heap-overrun.log: dfa-heap-overrun
+	@p='dfa-heap-overrun'; \
+	b='dfa-heap-overrun'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+dfa-infloop.log: dfa-infloop
+	@p='dfa-infloop'; \
+	b='dfa-infloop'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+dfa-invalid-utf8.log: dfa-invalid-utf8
+	@p='dfa-invalid-utf8'; \
+	b='dfa-invalid-utf8'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+dfaexec-multibyte.log: dfaexec-multibyte
+	@p='dfaexec-multibyte'; \
+	b='dfaexec-multibyte'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+empty.log: empty
+	@p='empty'; \
+	b='empty'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+empty-line.log: empty-line
+	@p='empty-line'; \
+	b='empty-line'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+empty-line-mb.log: empty-line-mb
+	@p='empty-line-mb'; \
+	b='empty-line-mb'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+encoding-error.log: encoding-error
+	@p='encoding-error'; \
+	b='encoding-error'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+epipe.log: epipe
+	@p='epipe'; \
+	b='epipe'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+equiv-classes.log: equiv-classes
+	@p='equiv-classes'; \
+	b='equiv-classes'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+ere.log: ere
+	@p='ere'; \
+	b='ere'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+euc-mb.log: euc-mb
+	@p='euc-mb'; \
+	b='euc-mb'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+false-match-mb-non-utf8.log: false-match-mb-non-utf8
+	@p='false-match-mb-non-utf8'; \
+	b='false-match-mb-non-utf8'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+fedora.log: fedora
+	@p='fedora'; \
+	b='fedora'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+fgrep-infloop.log: fgrep-infloop
+	@p='fgrep-infloop'; \
+	b='fgrep-infloop'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+fgrep-longest.log: fgrep-longest
+	@p='fgrep-longest'; \
+	b='fgrep-longest'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+file.log: file
+	@p='file'; \
+	b='file'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+fmbtest.log: fmbtest
+	@p='fmbtest'; \
+	b='fmbtest'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+foad1.log: foad1
+	@p='foad1'; \
+	b='foad1'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+grep-dev-null.log: grep-dev-null
+	@p='grep-dev-null'; \
+	b='grep-dev-null'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+grep-dev-null-out.log: grep-dev-null-out
+	@p='grep-dev-null-out'; \
+	b='grep-dev-null-out'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+grep-dir.log: grep-dir
+	@p='grep-dir'; \
+	b='grep-dir'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+hash-collision-perf.log: hash-collision-perf
+	@p='hash-collision-perf'; \
+	b='hash-collision-perf'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+help-version.log: help-version
+	@p='help-version'; \
+	b='help-version'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+high-bit-range.log: high-bit-range
+	@p='high-bit-range'; \
+	b='high-bit-range'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+in-eq-out-infloop.log: in-eq-out-infloop
+	@p='in-eq-out-infloop'; \
+	b='in-eq-out-infloop'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+include-exclude.log: include-exclude
+	@p='include-exclude'; \
+	b='include-exclude'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+inconsistent-range.log: inconsistent-range
+	@p='inconsistent-range'; \
+	b='inconsistent-range'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+initial-tab.log: initial-tab
+	@p='initial-tab'; \
+	b='initial-tab'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+invalid-multibyte-infloop.log: invalid-multibyte-infloop
+	@p='invalid-multibyte-infloop'; \
+	b='invalid-multibyte-infloop'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+khadafy.log: khadafy
+	@p='khadafy'; \
+	b='khadafy'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+kwset-abuse.log: kwset-abuse
+	@p='kwset-abuse'; \
+	b='kwset-abuse'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+long-line-vs-2GiB-read.log: long-line-vs-2GiB-read
+	@p='long-line-vs-2GiB-read'; \
+	b='long-line-vs-2GiB-read'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+long-pattern-perf.log: long-pattern-perf
+	@p='long-pattern-perf'; \
+	b='long-pattern-perf'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+many-regex-performance.log: many-regex-performance
+	@p='many-regex-performance'; \
+	b='many-regex-performance'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+match-lines.log: match-lines
+	@p='match-lines'; \
+	b='match-lines'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+max-count-overread.log: max-count-overread
+	@p='max-count-overread'; \
+	b='max-count-overread'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+max-count-vs-context.log: max-count-vs-context
+	@p='max-count-vs-context'; \
+	b='max-count-vs-context'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+mb-dot-newline.log: mb-dot-newline
+	@p='mb-dot-newline'; \
+	b='mb-dot-newline'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+mb-non-UTF8-overrun.log: mb-non-UTF8-overrun
+	@p='mb-non-UTF8-overrun'; \
+	b='mb-non-UTF8-overrun'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+mb-non-UTF8-perf-Fw.log: mb-non-UTF8-perf-Fw
+	@p='mb-non-UTF8-perf-Fw'; \
+	b='mb-non-UTF8-perf-Fw'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+mb-non-UTF8-performance.log: mb-non-UTF8-performance
+	@p='mb-non-UTF8-performance'; \
+	b='mb-non-UTF8-performance'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+mb-non-UTF8-word-boundary.log: mb-non-UTF8-word-boundary
+	@p='mb-non-UTF8-word-boundary'; \
+	b='mb-non-UTF8-word-boundary'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+multibyte-white-space.log: multibyte-white-space
+	@p='multibyte-white-space'; \
+	b='multibyte-white-space'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+multiple-begin-or-end-line.log: multiple-begin-or-end-line
+	@p='multiple-begin-or-end-line'; \
+	b='multiple-begin-or-end-line'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+null-byte.log: null-byte
+	@p='null-byte'; \
+	b='null-byte'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+options.log: options
+	@p='options'; \
+	b='options'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+pcre.log: pcre
+	@p='pcre'; \
+	b='pcre'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+pcre-abort.log: pcre-abort
+	@p='pcre-abort'; \
+	b='pcre-abort'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+pcre-context.log: pcre-context
+	@p='pcre-context'; \
+	b='pcre-context'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+pcre-count.log: pcre-count
+	@p='pcre-count'; \
+	b='pcre-count'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+pcre-infloop.log: pcre-infloop
+	@p='pcre-infloop'; \
+	b='pcre-infloop'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+pcre-invalid-utf8-infloop.log: pcre-invalid-utf8-infloop
+	@p='pcre-invalid-utf8-infloop'; \
+	b='pcre-invalid-utf8-infloop'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+pcre-invalid-utf8-input.log: pcre-invalid-utf8-input
+	@p='pcre-invalid-utf8-input'; \
+	b='pcre-invalid-utf8-input'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+pcre-jitstack.log: pcre-jitstack
+	@p='pcre-jitstack'; \
+	b='pcre-jitstack'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+pcre-o.log: pcre-o
+	@p='pcre-o'; \
+	b='pcre-o'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+pcre-utf8.log: pcre-utf8
+	@p='pcre-utf8'; \
+	b='pcre-utf8'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+pcre-w.log: pcre-w
+	@p='pcre-w'; \
+	b='pcre-w'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+pcre-wx-backref.log: pcre-wx-backref
+	@p='pcre-wx-backref'; \
+	b='pcre-wx-backref'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+pcre-z.log: pcre-z
+	@p='pcre-z'; \
+	b='pcre-z'; \
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+	--log-file $$b.log --trs-file $$b.trs \
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+
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+	list='$(DISTFILES)'; \
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+	  sed -e "s|^$$srcdirstrip/||;t" \
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+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
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+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
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+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+	-test -z "$(TEST_LOGS)" || rm -f $(TEST_LOGS)
+	-test -z "$(TEST_LOGS:.log=.trs)" || rm -f $(TEST_LOGS:.log=.trs)
+	-test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
+
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+
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+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
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+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
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+	$(AM_V_GEN)fail=0;						\
+        cd $(srcdir) && for i in $(TESTS); do				\
+	  test -x $$i || { fail=1; echo $$i >&2; };			\
+	done;								\
+	test $$fail = 1							\
+          && { echo the above test scripts are not executable >&2; exit 1; } \
+          || :
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/grep/tests/backref b/src/grep/tests/backref
new file mode 100755
index 0000000..947981b
--- /dev/null
+++ b/src/grep/tests/backref
@@ -0,0 +1,46 @@
+#! /bin/sh
+# Test for back-references and other things.
+#
+# Copyright (C) 2001, 2006, 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+failures=0
+
+# checking for a palindrome
+echo "radar" | grep -e '\(.\)\(.\).\2\1' > /dev/null 2>&1
+if test $? -ne 0 ; then
+        echo "Backref: palindrome, test #1 failed"
+        failures=1
+fi
+
+# hit hard with the 'Bond' tests
+# For now, remove the '?' in the last parentheses, so that new glibc can do it.
+# --Stepan
+echo "civic" \
+  | grep -E -e '^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.).?\9\8\7\6\5\4\3\2\1$' \
+         > /dev/null 2>&1
+if test $? -ne 0 ; then
+        echo "Options: Bond, test #2 failed"
+        failures=1
+fi
+
+# backref are local should be error
+echo "123" | grep -e 'a\(.\)' -e 'b\1' > /dev/null 2>&1
+if test $? -ne 2 ; then
+        echo "Backref: Backref not local, test #3 failed"
+        failures=1
+fi
+
+# Pattern should fail
+echo "123" | grep -e '[' -e ']' > /dev/null 2>&1
+if test $? -ne 2 ; then
+        echo "Backref: Compiled not local, test #4 failed"
+        failures=1
+fi
+
+Exit $failures
diff --git a/src/grep/tests/backref-alt b/src/grep/tests/backref-alt
new file mode 100755
index 0000000..986621b
--- /dev/null
+++ b/src/grep/tests/backref-alt
@@ -0,0 +1,34 @@
+#! /bin/sh
+# Test for a bug in glibc's regex code as of 2015-09-19.
+#
+# Copyright 2015-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+echo aa > in || framework_failure_
+
+fail=0
+
+grep -E 'b|(.)b|\1|b' in >out
+status=$?
+# POSIX isn't clear whether this regular expression should be invalid,
+# (because the \1 is out of range for REs that could precede it)
+# or valid but \1 should not match.  Allow either interpretation.
+test $status -eq 2 || test $status -eq 1 || fail=1
+
+grep -E '0|()0|\1|0' in >out
+status=$?
+test $status -eq 2 || test $status -eq 1 || fail=1
+
+# This test is a reduced version of the one in Bug#27838.
+# It triggers this glibc assertion failure:
+# grep: regexec.c:1342: pop_fail_stack: Assertion `num >= 0' failed.
+LC_ALL=C grep -E '(()x)|\2' in > out
+status=$?
+test $status -eq 2 || test $status -eq 1 || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/backref-multibyte-slow b/src/grep/tests/backref-multibyte-slow
new file mode 100755
index 0000000..9c4fe06
--- /dev/null
+++ b/src/grep/tests/backref-multibyte-slow
@@ -0,0 +1,33 @@
+#!/bin/sh
+# This was approximately quadratic up to grep-2.6.3
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+require_timeout_
+
+fail=0
+
+# Create a 13000-line input
+$AWK 'BEGIN {for (i=0; i<13000; i++) print "aba"}' /dev/null > in || fail=1
+
+# Use 10 times the duration of running grep in the C locale as the timeout
+# when running in en_US.UTF-8.  Round up to whole seconds, since timeout
+# can't deal with fractional seconds.
+max_seconds=$(LC_ALL=C perl -le 'use Time::HiRes qw(time); my $s = time();
+              system q,grep -E '\''^([a-z]).\1$'\'' in > junk,;
+              my $elapsed = time() - $s; print int (1 + 10 * $elapsed)') \
+  || { max_seconds=5;
+       warn_ "$ME_: warning: no perl? using default of 5s timeout"; }
+
+# If the above finished so quickly that we'd have a 1-second timeout,
+# increase it to a duration less likely to arise in a parallel test run.
+test $max_seconds = 1 && max_seconds=5
+
+for LOC in en_US.UTF-8; do
+  out=out-$LOC
+  LC_ALL=$LOC timeout ${max_seconds}s grep -aE '^([a-z]).\1$' in > $out 2>&1 \
+    || fail=1
+  compare $out in || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/backref-word b/src/grep/tests/backref-word
new file mode 100755
index 0000000..e5b5486
--- /dev/null
+++ b/src/grep/tests/backref-word
@@ -0,0 +1,18 @@
+#!/bin/sh
+# This would fail for grep-2.6
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+printf 'foo foo bar\n'      > exp1 || framework_failure_
+fail=0
+
+for LOC in en_US.UTF-8 zh_CN $LOCALE_FR_UTF8; do
+  out=out1-$LOC
+  LC_ALL=$LOC grep -w '\(foo\) \1' exp1 > $out || fail=1
+  compare exp1 $out || fail=1
+
+  LC_ALL=$LOC grep -wx '\(foo\) \1' exp1 > $out
+  test $? -eq 1 || fail=1
+  compare /dev/null $out || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/backslash-dot b/src/grep/tests/backslash-dot
new file mode 100755
index 0000000..b4dd567
--- /dev/null
+++ b/src/grep/tests/backslash-dot
@@ -0,0 +1,20 @@
+#! /bin/sh
+# This once failed to match: echo . | grep '\.'
+#
+# Copyright (C) 2020-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+echo . > in || framework_failure_
+
+grep '\.' in > out 2> err || fail=1
+compare in out || fail=1
+compare /dev/null err || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/backslash-s-and-repetition-operators b/src/grep/tests/backslash-s-and-repetition-operators
new file mode 100755
index 0000000..8acb60a
--- /dev/null
+++ b/src/grep/tests/backslash-s-and-repetition-operators
@@ -0,0 +1,36 @@
+#! /bin/sh
+# Ensure that \s and \S work with repetition operators.
+#
+# Copyright (C) 2013-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+
+fail=0
+
+for loc in en_US.UTF-8 C; do
+  echo locale=$loc
+  LC_ALL=$loc
+  export LC_ALL
+
+  printf ' \n' > in || framework_failure_
+
+  for re in '\s\+' '\s*' '\s\?' '\s\{1\}'; do
+    grep "^$re\$" in > out || fail=1
+    compare in out || fail=1
+  done
+
+  printf 'X\n' > in || framework_failure_
+
+  for re in '\S\+' '\S*' '\S\?' '\S\{1\}'; do
+    grep "^$re\$" in > out || fail=1
+    compare in out || fail=1
+  done
+done
+
+Exit $fail
diff --git a/src/grep/tests/backslash-s-vs-invalid-multibyte b/src/grep/tests/backslash-s-vs-invalid-multibyte
new file mode 100755
index 0000000..79d5733
--- /dev/null
+++ b/src/grep/tests/backslash-s-vs-invalid-multibyte
@@ -0,0 +1,26 @@
+#! /bin/sh
+# Ensure that neither \s nor \S matches an invalid multibyte character.
+#
+# Copyright (C) 2013-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+
+printf '\202\n' > in || framework_failure_
+
+LC_ALL=en_US.UTF-8
+export LC_ALL
+
+fail=0
+grep '^\S$' in > out-S && fail=1
+compare /dev/null out-S || fail=1
+
+grep '^\s$' in > out-s && fail=1
+compare /dev/null out-s || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/big-hole b/src/grep/tests/big-hole
new file mode 100755
index 0000000..eac077f
--- /dev/null
+++ b/src/grep/tests/big-hole
@@ -0,0 +1,29 @@
+#!/bin/sh
+# Check that grep --binary-file=without-match quickly skips files with holes.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+expensive_
+
+# Skip this test if there is no usable SEEK_HOLE support,
+# as is the case with linux-3.5.0 on ext4 and tmpfs file systems.
+$PERL -e '$f=*STDERR; sysseek($f,2**22,0); syswrite($f,"a");' \
+      -e 'exit ("0 but true" ne sysseek($f,0,4))' 2> seek-hole-test \
+  || skip_ "this system/FS lacks SEEK_HOLE support"
+
+# Try to make this test not THAT expensive, on typical hosts.
+virtual_memory_KiB=10240
+if echo x | (ulimit -v $virtual_memory_KiB && grep x) >/dev/null 2>&1; then
+  ulimit -v $virtual_memory_KiB
+fi
+
+# Create a file that starts with at least a buffer's worth of text,
+# but has a big hole later.
+(${AWK-awk} 'BEGIN{ for (i=0;i<1000;i++) printf "%080d\n", 0 }' < /dev/null
+  echo x | dd bs=1024k seek=8000000
+) >8T-or-so || skip_ 'cannot create big sparse file'
+
+grep --binary-file=without-match x 8T-or-so >/dev/null
+test $? -eq 1 || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/big-match b/src/grep/tests/big-match
new file mode 100755
index 0000000..0da9731
--- /dev/null
+++ b/src/grep/tests/big-match
@@ -0,0 +1,36 @@
+#!/bin/sh
+# Check that grep doesn't mishandle long matching lines.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+expensive_
+
+# Create a one-line file containing slightly more than 2 GiB.
+echo x | dd bs=1024k seek=2048 >2G-plus-2 || framework_failure_
+
+skip_diagnostic=
+
+# These two patterns catch different kinds of
+# failures due to internal integer overflows.
+# However, the second one, '^.*x\(\)\1', provokes
+# so much memory consumption via regexec.c that it renders
+# some systems unusable.
+for pattern in '^.*'; do
+  diagnostic=$(LC_ALL=C grep -a "$pattern" 2G-plus-2 2>&1 >/dev/null)
+  status=$?
+
+  case $status,$diagnostic in
+    0,*) ;;
+    2,*': line too long for re_search')
+       skip_diagnostic='regular expression library cannot handle the test' ;;
+    137,''|2,*': memory exhausted')
+       # The 137/no-diagnostic arises when the kernel OOM-kills grep.
+       skip_diagnostic='not enough main memory to run the test' ;;
+    *) fail=1 ;;
+  esac
+done
+
+case $fail,$skip_diagnostic in
+0,?*) skip_ "$skip_diagnostic" ;;
+esac
+
+Exit $fail
diff --git a/src/grep/tests/binary-file-matches b/src/grep/tests/binary-file-matches
new file mode 100755
index 0000000..7fc4a11
--- /dev/null
+++ b/src/grep/tests/binary-file-matches
@@ -0,0 +1,21 @@
+#! /bin/sh
+# Test for the "binary file ... matches" diagnostic.
+#
+# Copyright (C) 2020-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+echo "grep: (standard input): binary file matches" > exp \
+  || framework_failure_
+
+printf 'a\0' | grep a > out 2> err || fail=1
+compare /dev/null out || fail=1
+compare exp err || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/bogus-wctob b/src/grep/tests/bogus-wctob
new file mode 100755
index 0000000..6be6c39
--- /dev/null
+++ b/src/grep/tests/bogus-wctob
@@ -0,0 +1,17 @@
+#!/bin/sh
+# This was latent in grep-2.8 and earlier because we punted interpretation
+# of MBCSETs to glibc.  However, it becomes apparent as soon as "[à]" is
+# simplified to "à".
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+printf '\340'      > in || framework_failure_
+fail=0
+
+LC_ALL=en_US.UTF-8 grep '[à]' in
+case $? in
+  0) fail=1 ;;
+  1) ;;
+  2) framework_failure_ unexpected error from grep ;;
+esac
+
+Exit $fail
diff --git a/src/grep/tests/bre b/src/grep/tests/bre
new file mode 100755
index 0000000..5be164c
--- /dev/null
+++ b/src/grep/tests/bre
@@ -0,0 +1,21 @@
+#! /bin/sh
+# Regression test for GNU grep.
+#
+# Copyright (C) 2001, 2006, 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+# . . . and the following by Henry Spencer.
+
+${AWK-awk} -f $abs_top_srcdir/tests/bre.awk $abs_top_srcdir/tests/bre.tests \
+    > bre.script || fail=1
+
+${re_shell-${SHELL-sh}} ./bre.script || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/bre.awk b/src/grep/tests/bre.awk
new file mode 100644
index 0000000..519e270
--- /dev/null
+++ b/src/grep/tests/bre.awk
@@ -0,0 +1,33 @@
+# Copyright (C) 2001, 2006, 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+BEGIN {
+        FS="@";
+        n = 0;
+        printf ("# Generated Spencer BRE Test\n");
+        printf ("failures=0\n");
+}
+
+$0 ~ /^#/  { next; }
+
+NF == 3 {
+#	printf ("status=$(echo '%s' | { grep -e '%s' > /dev/null 2>&1; echo $?; cat >/dev/null; })\n",$3, $2);
+        printf ("status=$(echo '%s' | { grep -e '%s' > /dev/null 2>&1; echo $? ; })\n",$3, $2);
+        printf ("if test $status -ne %s ; then\n", $1);
+        printf ("\techo Spencer bre test \\#%d failed\n", ++n);
+        printf ("\tfailures=1\n");
+        printf ("fi\n");
+}
+
+NF == 4 {
+#don't alarm users
+#	printf ("echo '%s' | grep -e '%s' > /dev/null 2>&1\n",$3, $2);
+#	printf ("if test $? -ne %s ; then\n", $1);
+#	printf ("\techo Expected non conformance \\#%d ... continuing\n", ++n);
+#	printf ("fi\n");
+}
+
+END { printf ("exit $failures\n"); }
diff --git a/src/grep/tests/bre.tests b/src/grep/tests/bre.tests
new file mode 100644
index 0000000..9d01a3c
--- /dev/null
+++ b/src/grep/tests/bre.tests
@@ -0,0 +1,64 @@
+0@a\(b\)c@abc
+0@a(@a(
+2@a\(@EPAREN
+2@a\(b@EPAREN
+0@a(b@a(b
+0@a)@a)
+2@a\)@EPAREN
+2@\)@EPAREN
+0@a\(\)b@ab
+0@a^b@a^b
+0@a$b@a$b
+0@\($\)\(^\)@@TO CORRECT
+0@a*\(^b$\)c*@b
+0@|@|
+0@*@*
+0@\(\)@abc
+2@\(\{1\}a\)@BADRPT@TO CORRECT
+0@^*@*
+2@^\{1\}@BADRPT@TO CORRECT
+0@{@{
+1@a\(b*\)c\1d@abbcbd
+1@a\(b*\)c\1d@abbcbbbd
+1@^\(.\)\1@abc
+0@a\(\([bc]\)\2\)*d@abbccd
+1@a\(\([bc]\)\2\)*d@abbcbd
+0@a\(\(b\)*\2\)*d@abbbd
+0@\(a\)\1bcd@aabcd
+0@\(a\)\1bc*d@aabcd
+0@\(a\)\1bc*d@aabd
+0@\(a\)\1bc*d@aabcccd
+0@\(a\)\1bc*[ce]d@aabcccd@TO CORRECT
+0@^\(a\)\1b\(c\)*cd$@aabcccd
+0@a\(*\)b@a*b
+0@a\(**\)b@ab
+2@a\(***\)b@BADRPT@TO CORRECT
+0@*a@*a
+0@**a@a
+2@***a@BADRPT@TO CORRECT
+0@a\{1\}b@ab
+0@a\{1,\}b@ab
+0@a\{1,2\}b@aab
+2@a\{1@EBRACE
+2@a\{1a@EBRACE
+2@a\{1a\}@BADBR
+0@a\{,2\}@a\{,2\}
+0@a\{,\}@a\{,\}
+2@a\{\}@BADBR
+2@a\{1,x\}@BADBR
+2@a\{1,x@EBRACE
+2@a\{32768\}@BADBR
+2@a\{1,0\}@BADBR
+0@ab\{0,0\}c@abcac
+0@ab\{0,1\}c@abcac
+0@ab\{0,3\}c@abbcac
+0@ab\{1,1\}c@acabc
+0@ab\{1,3\}c@acabc
+0@ab\{2,2\}c@abcabbc
+0@ab\{2,4\}c@abcabbc
+2@a\{1\}\{1\}@BADRPT@TO CORRECT
+2@a*\{1\}@BADRPT@TO CORRECT
+2@a\{1\}*@BADRPT@TO CORRECT
+1@a\(b\)?c\1d@acd
+0@-\{0,1\}[0-9]*$@-5
+2@b\{1000000000\}@ESIZE
diff --git a/src/grep/tests/c-locale b/src/grep/tests/c-locale
new file mode 100755
index 0000000..15d63b2
--- /dev/null
+++ b/src/grep/tests/c-locale
@@ -0,0 +1,26 @@
+#! /bin/sh
+# Regression test for GNU grep.
+#
+# Copyright 2016-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+c=1
+while test $c -lt 256; do
+  tr2=$(printf '\\%o\n' $c)
+  echo X | tr X "$tr2" >in
+  if test $(wc -l <in) -eq 1; then
+    grep . in >out || fail=1
+    compare in out || fail=1
+  fi
+  test $fail -ne 0 && Exit $fail
+  c=$(expr $c + 1)
+done
+
+Exit $fail
diff --git a/src/grep/tests/case-fold-backref b/src/grep/tests/case-fold-backref
new file mode 100755
index 0000000..b96b481
--- /dev/null
+++ b/src/grep/tests/case-fold-backref
@@ -0,0 +1,14 @@
+#!/bin/sh
+# This would fail for grep-2.5.3
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+printf '%s foo\n' foo fOo Foo FOO > exp1 || framework_failure_
+fail=0
+
+for LOC in en_US.UTF-8 en_US zh_CN $LOCALE_FR_UTF8 C; do
+  out=out1-$LOC
+  LC_ALL=$LOC grep -Ei '(foo) \1' exp1 > $out || fail=1
+  compare exp1 $out || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/case-fold-backslash-w b/src/grep/tests/case-fold-backslash-w
new file mode 100755
index 0000000..57ff0f5
--- /dev/null
+++ b/src/grep/tests/case-fold-backslash-w
@@ -0,0 +1,13 @@
+#!/bin/sh
+# test that \W works on case-insensitive matches.  It used to become \w.
+# Derived from https://savannah.gnu.org/bugs/?28162
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+if echo foo bar | LANG=C.ASCII grep '^foo\W'; then
+  echo foo bar | LANG=C.ASCII grep -i '^foo\W' || fail_ ASCII insensitive
+else
+  echo foo bar | LANG=C grep '^foo\W' || fail_ LANG=C sensitive
+  echo foo bar | LANG=C grep -i '^foo\W' || fail_ LANG=C insensitive
+fi
+echo foo bar | LANG=en_US.UTF-8 grep '^foo\W' || fail_ UTF-8 sensitive
+echo foo bar | LANG=en_US.UTF-8 grep -i '^foo\W' || fail_ UTF-8 insensitive
diff --git a/src/grep/tests/case-fold-char-class b/src/grep/tests/case-fold-char-class
new file mode 100755
index 0000000..ac8f3ee
--- /dev/null
+++ b/src/grep/tests/case-fold-char-class
@@ -0,0 +1,22 @@
+#!/bin/sh
+# This would fail for grep-2.5.3
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+printf 'Y\n'      > exp1 || framework_failure_
+fail=0
+
+for LOC in en_US.UTF-8 zh_CN $LOCALE_FR_UTF8; do
+  out=out1-$LOC
+  printf 'X\nY\nZ\n' | LC_ALL=$LOC grep -i '[y]' > $out || fail=1
+  compare exp1 $out || fail=1
+done
+
+printf 'y\n'      > exp2 || framework_failure_
+
+for LOC in en_US.UTF-8 zh_CN $LOCALE_FR_UTF8; do
+  out=out2-$LOC
+  printf 'x\ny\nz\n' | LC_ALL=$LOC grep -i '[Y]' > $out || fail=1
+  compare exp2 $out || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/case-fold-char-range b/src/grep/tests/case-fold-char-range
new file mode 100755
index 0000000..4203024
--- /dev/null
+++ b/src/grep/tests/case-fold-char-range
@@ -0,0 +1,23 @@
+#!/bin/sh
+# This would fail for grep-2.5.3
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+printf 'A\nZ\n'      > exp1 || framework_failure_
+fail=0
+
+for LOC in en_US.UTF-8 zh_CN $LOCALE_FR_UTF8; do
+  out=out1-$LOC
+  printf 'A\n1\nZ\n.\n' | LC_ALL=$LOC grep -i '[a-z]' > $out || fail=1
+  compare exp1 $out || fail=1
+done
+
+# This actually passes also for grep-2.5.3
+printf 'a\nz\n'      > exp2 || framework_failure_
+
+for LOC in en_US.UTF-8 zh_CN $LOCALE_FR_UTF8; do
+  out=out2-$LOC
+  printf 'a\n1\nz\n.\n' | LC_ALL=$LOC grep -i '[A-Z]' > $out || fail=1
+  compare exp2 $out || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/case-fold-char-type b/src/grep/tests/case-fold-char-type
new file mode 100755
index 0000000..d5fd67c
--- /dev/null
+++ b/src/grep/tests/case-fold-char-type
@@ -0,0 +1,22 @@
+#!/bin/sh
+# This would fail for grep-2.5.3
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+printf 'Y\n'      > exp1 || framework_failure_
+fail=0
+
+for LOC in en_US.UTF-8 zh_CN $LOCALE_FR_UTF8; do
+  out=out1-$LOC
+  printf '1\nY\n.\n' | LC_ALL=$LOC grep -i '[[:lower:]]' > $out || fail=1
+  compare exp1 $out || fail=1
+done
+
+printf 'y\n'      > exp2 || framework_failure_
+
+for LOC in en_US.UTF-8 zh_CN $LOCALE_FR_UTF8; do
+  out=out2-$LOC
+  printf '1\ny\n.\n' | LC_ALL=$LOC grep -i '[[:upper:]]' > $out || fail=1
+  compare exp2 $out || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/case-fold-titlecase b/src/grep/tests/case-fold-titlecase
new file mode 100755
index 0000000..0aaf616
--- /dev/null
+++ b/src/grep/tests/case-fold-titlecase
@@ -0,0 +1,190 @@
+#!/bin/sh
+# Check that case folding works even with titlecase and similarly odd chars.
+
+# Copyright 2014-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+require_compiled_in_MB_support
+LC_ALL=en_US.UTF-8
+export LC_ALL
+
+fail=0
+
+for testcase in \
+  0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
+do
+  case $testcase in
+    0)
+      a='\302\265'     # U+00B5
+      b='\316\234'     # U+039C
+      c='\316\274'     # U+03BC
+      ;;
+    1)
+      a='\111'         # U+0049
+      b='\151'         # U+0069
+      c='\304\260'     # U+0130
+      ;;
+    2)
+      a='\111'         # U+0049
+      b='\151'         # U+0069
+      c='\304\261'     # U+0131
+      ;;
+    3)
+      a='\123'         # U+0053
+      b='\163'         # U+0073
+      c='\305\277'     # U+017F
+      ;;
+    4)
+      a='\307\204'     # U+01C4
+      b='\307\205'     # U+01C5
+      c='\307\206'     # U+01C6
+      ;;
+    5)
+      a='\307\207'     # U+01C7
+      b='\307\210'     # U+01C8
+      c='\307\211'     # U+01C9
+      ;;
+    6)
+      a='\307\212'     # U+01CA
+      b='\307\213'     # U+01CB
+      c='\307\214'     # U+01CC
+      ;;
+    7)
+      a='\307\261'     # U+01F1
+      b='\307\262'     # U+01F2
+      c='\307\263'     # U+01F3
+      ;;
+    8)
+      a='\315\205'     # U+0345
+      b='\316\231'     # U+0399
+      c='\316\271'     # U+03B9
+      ;;
+    9)
+      a='\316\243'     # U+03A3
+      b='\317\202'     # U+03C2
+      c='\317\203'     # U+03C3
+      ;;
+    10)
+      a='\316\222'     # U+0392
+      b='\316\262'     # U+03B2
+      c='\317\220'     # U+03D0
+      ;;
+    11)
+      a='\316\230'     # U+0398
+      b='\316\270'     # U+03B8
+      c='\317\221'     # U+03D1
+      ;;
+    12)
+      a='\316\246'     # U+03A6
+      b='\317\206'     # U+03C6
+      c='\317\225'     # U+03D5
+      ;;
+    13)
+      a='\316\240'     # U+03A0
+      b='\317\200'     # U+03C0
+      c='\317\226'     # U+03D6
+      ;;
+    14)
+      a='\316\232'     # U+039A
+      b='\316\272'     # U+03BA
+      c='\317\260'     # U+03F0
+      ;;
+    15)
+      a='\316\241'     # U+03A1
+      b='\317\201'     # U+03C1
+      c='\317\261'     # U+03F1
+      ;;
+    16)
+      a='\316\230'     # U+0398
+      b='\316\270'     # U+03B8
+      c='\317\264'     # U+03F4
+      ;;
+    17)
+      a='\316\225'     # U+0395
+      b='\316\265'     # U+03B5
+      c='\317\265'     # U+03F5
+      ;;
+    18)
+      a='\341\271\240' # U+1E60
+      b='\341\271\241' # U+1E61
+      c='\341\272\233' # U+1E9B
+      ;;
+    19)
+      a='\303\237'     # U+00DF
+      b='\303\237'     # U+00DF
+      c='\341\272\236' # U+1E9E
+      ;;
+    20)
+      a='\316\231'     # U+0399
+      b='\316\271'     # U+03B9
+      c='\341\276\276' # U+1FBE
+      ;;
+    21)
+      a='\316\251'     # U+03A9
+      b='\317\211'     # U+03C9
+      c='\342\204\246' # U+2126
+      ;;
+    22)
+      a='\113'         # U+004B
+      b='\153'         # U+006B
+      c='\342\204\252' # U+212A
+      ;;
+    23)
+      a='\303\205'     # U+00C5
+      b='\303\245'     # U+00E5
+      c='\342\204\253' # U+212B
+      ;;
+    24)
+      a='\316\243'     # U+03A3
+      b='\317\203'     # U+03C3
+      c='\317\262'     # U+03F2
+      ;;
+  esac
+
+  printf "$a\\n$b\\n$c\\n" >in || framework_failure_
+  for pattern in "$a" "$b" "$c"; do
+     pat=$(printf "$pattern\\n") || framework_failure_
+     grep -i "\\(\\)\\1$pat" in >out-regex || fail=1
+     grep -i "$pat" in >out-dfa || fail=1
+     compare_ out-regex out-dfa || fail=1
+     grep -iF "$pat" in >out-fixed || fail=1
+     compare_ out-regex out-fixed || fail=1
+  done
+done
+
+# Try a unibyte test with ISO 8859-7, if available.
+if test "$(get-mb-cur-max el_GR.iso88597)" -eq 1; then
+  LC_ALL=el_GR.iso88597
+  export LC_ALL
+
+  a='\323' # SIGMA
+  b='\362' # stigma
+  c='\363' # sigma
+
+  printf "$a\\n$b\\n$c\\n" >in || framework_failure_
+  for pattern in "$a" "$b" "$c"; do
+     pat=$(printf "$pattern\\n") || framework_failure_
+     grep -i "\\(\\)\\1$pat" in >out-regex || fail=1
+     grep -i "$pat" in >out-dfa || fail=1
+     compare_ out-regex out-dfa || fail=1
+     grep -iF "$pat" in >out-fixed || fail=1
+     compare_ out-regex out-fixed || fail=1
+  done
+fi
+
+Exit $fail
diff --git a/src/grep/tests/char-class-multibyte b/src/grep/tests/char-class-multibyte
new file mode 100755
index 0000000..b957518
--- /dev/null
+++ b/src/grep/tests/char-class-multibyte
@@ -0,0 +1,30 @@
+#!/bin/sh
+# This would segfault for grep-2.6
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+require_compiled_in_MB_support
+
+printf 'é\n'      > exp1 || framework_failure_
+fail=0
+
+for LOC in en_US.UTF-8 $LOCALE_FR_UTF8; do
+  out=out1-$LOC
+  printf 'á\nç\né\n' | LC_ALL=$LOC grep '[é]' > $out || fail=1
+  compare exp1 $out || fail=1
+done
+
+printf 'É\n'      > exp2 || framework_failure_
+
+for LOC in en_US.UTF-8 $LOCALE_FR_UTF8; do
+  out=out2-$LOC
+  printf 'Á\nÇ\nÉ\n' | LC_ALL=$LOC grep '[É]' > $out || fail=1
+  compare exp2 $out || fail=1
+done
+
+for LOC in en_US.UTF-8 $LOCALE_FR_UTF8; do
+  out=out3-$LOC
+  printf '\303\n' | returns_ 1 env LC_ALL=$LOC grep '[é]' > $out || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/char-class-multibyte2 b/src/grep/tests/char-class-multibyte2
new file mode 100755
index 0000000..6cdada5
--- /dev/null
+++ b/src/grep/tests/char-class-multibyte2
@@ -0,0 +1,19 @@
+#!/bin/sh
+# This test would segfault for grep-2.14
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+require_compiled_in_MB_support
+
+e_acute=$(printf '\303\251')
+printf "$e_acute\n" > exp || framework_failure_
+fail=0
+
+for LOC in en_US.UTF-8 $LOCALE_FR_UTF8; do
+  out=out-$LOC
+  printf "á\nç\n$e_acute\n" | LC_ALL=$LOC grep -E "([^.]*[$e_acute]){1,2}" \
+      > $out || fail=1
+  compare exp $out || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/context-0 b/src/grep/tests/context-0
new file mode 100755
index 0000000..4b63305
--- /dev/null
+++ b/src/grep/tests/context-0
@@ -0,0 +1,27 @@
+#!/bin/sh
+# 0 lines of context
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+cat <<EOF > in || framework_failure_
+needle
+1st line of context
+2nd line of context
+3rd line of context
+another needle
+5th line of context relative to first match
+6th line...
+EOF
+
+cat <<EOF > exp || framework_failure_
+needle
+--
+another needle
+EOF
+
+fail=0
+grep -C 0 needle in > out 2>err || fail=1
+
+compare exp out || fail=1
+compare /dev/null err || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/count-newline b/src/grep/tests/count-newline
new file mode 100755
index 0000000..10e0870
--- /dev/null
+++ b/src/grep/tests/count-newline
@@ -0,0 +1,28 @@
+#!/bin/sh
+# Test that newline is counted correctly even when the transition
+# table is rebuilt.
+
+# Copyright 2014-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+printf '%1024d\nb\n' 0 >in || framework_failure_
+
+grep -f in in >out || fail=1
+
+compare in out || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/dfa-coverage b/src/grep/tests/dfa-coverage
new file mode 100755
index 0000000..0a67fbb
--- /dev/null
+++ b/src/grep/tests/dfa-coverage
@@ -0,0 +1,32 @@
+#!/bin/sh
+# Exercise the final reachable code in dfa.c's match_mb_charset.
+
+# Copyright (C) 2012-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+require_compiled_in_MB_support
+
+fail=0
+
+echo a > in || framework_failure_
+
+LC_ALL=en_US.UTF-8 grep -E '[^_]|$' in > out || fail=1
+
+compare out in || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/dfa-heap-overrun b/src/grep/tests/dfa-heap-overrun
new file mode 100755
index 0000000..4ffa789
--- /dev/null
+++ b/src/grep/tests/dfa-heap-overrun
@@ -0,0 +1,25 @@
+#!/bin/sh
+# Trigger a heap overrun in grep-2.6..grep-2.8.
+
+# Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+returns_ 1 grep -E '(^| )*(a|b)*(c|d)*( |$)' < /dev/null || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/dfa-infloop b/src/grep/tests/dfa-infloop
new file mode 100755
index 0000000..e35eef5
--- /dev/null
+++ b/src/grep/tests/dfa-infloop
@@ -0,0 +1,12 @@
+#!/bin/sh
+# This would infloop for some unreleased versions between 2.26 and 2.27
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_timeout_
+
+fail=0
+
+echo cx > in || framework_failure_
+returns_ 1 timeout 10 env LC_ALL=C grep -E 'c\b[x ]' in || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/dfa-invalid-utf8 b/src/grep/tests/dfa-invalid-utf8
new file mode 100755
index 0000000..8d4e96e
--- /dev/null
+++ b/src/grep/tests/dfa-invalid-utf8
@@ -0,0 +1,29 @@
+#! /bin/sh
+# Test whether "grep '.'" matches invalid UTF-8 byte sequences.
+#
+# Copyright 2019-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_en_utf8_locale_
+require_compiled_in_MB_support
+
+fail=0
+
+printf 'a\360\202\202\254b\n' >in1 || framework_failure_
+LC_ALL=en_US.UTF-8 grep 'a.b' in1 > out1 2> err
+test $? -eq 1 || fail=1
+compare /dev/null out1 || fail=1
+compare /dev/null err1 || fail=1
+
+printf 'a\360\202\202\254ba\360\202\202\254b\n' >in2 ||
+  framework_failure_
+LC_ALL=en_US.UTF-8 grep -E '(a.b)\1' in2 > out2 2> err
+test $? -eq 1 || fail=1
+compare /dev/null out2 || fail=1
+compare /dev/null err2 || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/dfaexec-multibyte b/src/grep/tests/dfaexec-multibyte
new file mode 100755
index 0000000..baac9ba
--- /dev/null
+++ b/src/grep/tests/dfaexec-multibyte
@@ -0,0 +1,25 @@
+#!/bin/sh
+# This would fail for grep-2.5.3
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+printf 'aa\nab\nba\nbb\n' > exp1 || framework_failure_
+printf '1 2 3\n' > exp2 || framework_failure_
+
+fail=0
+
+for LOC in en_US.UTF-8 zh_CN $LOCALE_FR_UTF8; do
+  out=out1-ab-$LOC
+  LC_ALL=$LOC grep -E '([a]|[b]){2}' < exp1 > $out || fail=1
+  compare exp1 $out || fail=1
+
+  out=out1-ba-$LOC
+  LC_ALL=$LOC grep -E '([b]|[a]){2}' < exp1 > $out || fail=1
+  compare exp1 $out || fail=1
+
+  out=out2-$LOC
+  LC_ALL=$LOC grep -E '^([[:digit:]]+[[:space:]]+){2}' < exp2 > $out || fail=1
+  compare exp2 $out || fail=1
+
+done
+
+Exit $fail
diff --git a/src/grep/tests/empty b/src/grep/tests/empty
new file mode 100755
index 0000000..92f50bb
--- /dev/null
+++ b/src/grep/tests/empty
@@ -0,0 +1,82 @@
+#! /bin/sh
+# test that the empty file means no pattern
+# and an empty pattern means match all.
+#
+# Copyright (C) 2001, 2006, 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_timeout_
+
+failures=0
+
+for locale in C en_US.UTF-8; do
+    for options in '-E' '-F'; do
+
+        # should return 0 found a match
+        echo "" | LC_ALL=$locale timeout 10s grep $options -e ''
+        if test $? -ne 0 ; then
+          echo "Status: Wrong status code, test \#1 failed ($options $locale)"
+          failures=1
+        fi
+
+        # should return 1 found no match
+        echo abcd | LC_ALL=$locale timeout 10s grep $options -f /dev/null
+        if test $? -ne 1 ; then
+          echo "Status: Wrong status code, test \#2 failed ($options $locale)"
+          failures=1
+        fi
+
+        # should return 0 found a match
+        echo abcd \
+            | LC_ALL=$locale timeout 10s grep $options -f /dev/null -e abcd
+        if test $? -ne 0 ; then
+          echo "Status: Wrong status code, test \#3 failed ($options $locale)"
+          failures=1
+        fi
+
+        # should return 0 found a match
+        echo "" | LC_ALL=$locale timeout 10s grep $options -e ''
+        if test $? -ne 0 ; then
+          echo "Status: Wrong status code, test \#4 failed ($options $locale)"
+          failures=1
+        fi
+
+        # should return 0 found a match
+        echo abcd | LC_ALL=$locale timeout 10s grep $options -e ''
+        if test $? -ne 0 ; then
+          echo "Status: Wrong status code, test \#5 failed ($options $locale)"
+          failures=1
+        fi
+    done
+
+    for options in '-E -w' '-E -x' '-E -w -x' '-F -w' '-F -x' '-F -w -x'; do
+
+        # should return 0 found a match
+        echo "" | LC_ALL=$locale timeout 10s grep $options -e ''
+        if test $? -ne 0 ; then
+          echo "Status: Wrong status code, test \#6 failed ($options $locale)"
+          failures=1
+        fi
+
+        # should return 1 found no match
+        echo abcd | LC_ALL=$locale timeout 10s grep $options -f /dev/null
+        if test $? -ne 1 ; then
+          echo "Status: Wrong status code, test \#7 failed ($options $locale)"
+          failures=1
+        fi
+
+        # should return 1 found no match
+        echo abcd | LC_ALL=$locale timeout 10s grep $options -f /dev/null -e ""
+        if test $? -ne 1 ; then
+          echo "Status: Wrong status code, test \#8 failed ($options $locale)"
+          failures=1
+        fi
+    done
+done
+
+Exit $failures
diff --git a/src/grep/tests/empty-line b/src/grep/tests/empty-line
new file mode 100755
index 0000000..25e9509
--- /dev/null
+++ b/src/grep/tests/empty-line
@@ -0,0 +1,41 @@
+#! /bin/sh
+# Test that the empty pattern matches everything.
+# Some of these tests failed in grep 2.18.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+printf 'abc\n' >in || framework_failure_
+nl='
+'
+
+for opt in '' -E -F; do
+  case $opt in
+    '') prefix='\(\)\1';;
+    -E) prefix='()\1';;
+    -F) prefix="foo$nl";;
+  esac
+
+  for pattern in "" "$nl" "---$nl" "${nl}foo"; do
+    for pat in "$pattern" "$prefix$pattern"; do
+      grep $opt -e "$pat" in >out || fail=1
+      compare in out || fail=1
+
+      printf -- '%s\n' "$pat" >pat || framework_failure_
+      grep $opt -f pat in >out || fail=1
+      compare in out || fail=1
+
+      # Check that pattern files that end in non-newlines
+      # are treated as if a newline were appended.
+      case $pattern in
+        '' | *"$nl") ;;
+        *)
+          printf -- '%s' "$pat" >pat || framework_failure_
+          grep $opt -f pat in >out || fail=1
+          compare in out || fail=1;;
+      esac
+    done
+  done
+done
+
+Exit $fail
diff --git a/src/grep/tests/empty-line-mb b/src/grep/tests/empty-line-mb
new file mode 100755
index 0000000..579921d
--- /dev/null
+++ b/src/grep/tests/empty-line-mb
@@ -0,0 +1,29 @@
+#! /bin/sh
+# Exercise bugs in grep-2.13 with -i, -n and an RE of ^$ in a multi-byte locale.
+#
+# Copyright (C) 2012-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+
+LC_ALL=en_US.UTF-8
+export LC_ALL
+
+printf 'a\n\nb\n' > in || framework_failure_
+printf '2:\n' > exp || framework_failure_
+
+printf 'a\nb\n' > in2 || framework_failure_
+
+grep -n -i '^$' in > out || fail=1
+compare exp out || fail=1
+
+# Expect no match: with grep-2.13 this would mistakenly exit 0
+grep -i '^$' in2 > out && fail=1
+compare /dev/null out || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/encoding-error b/src/grep/tests/encoding-error
new file mode 100755
index 0000000..2ec71c9
--- /dev/null
+++ b/src/grep/tests/encoding-error
@@ -0,0 +1,52 @@
+#! /bin/sh
+# Test grep's behavior on encoding errors.
+#
+# Copyright 2015-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+
+printf 'Alfred Jones\n' > a || framework_failure_
+printf 'John Smith\n' >j || framework_failure_
+printf 'Pedro P\351rez\n' >p || framework_failure_
+cat a p j >in || framework_failure_
+
+LC_ALL=en_US.UTF-8
+export LC_ALL
+
+fail=0
+
+grep '^A' in >out || fail=1
+compare a out || fail=1
+
+grep '^P' in >out || fail=1
+compare /dev/null out || fail=1
+
+grep -I '^P' in >out 2>err || fail=1
+compare /dev/null out || fail=1
+compare /dev/null err || fail=1
+
+grep '^J' in >out || fail=1
+compare j out || fail=1
+
+returns_ 1 grep '^X' in >out || fail=1
+compare /dev/null out || fail=1
+
+grep . in >out || fail=1
+cat a j >exp || framework_failure_
+compare exp out || fail=1
+
+grep -I . in >out 2>err || fail=1
+cat a j >exp || framework_failure_
+compare exp out || fail=1
+compare /dev/null err || fail=1
+
+grep -a . in >out || fail=1
+compare in out
+
+Exit $fail
diff --git a/src/grep/tests/envvar-check b/src/grep/tests/envvar-check
new file mode 100644
index 0000000..decc256
--- /dev/null
+++ b/src/grep/tests/envvar-check
@@ -0,0 +1,63 @@
+# -*- sh -*-
+# Check environment variables for sane values while testing.
+
+# Copyright (C) 2000-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+if (FOO=FOO; unset FOO) >/dev/null 2>&1; then
+  as_unset=unset
+else
+  as_unset=false
+fi
+
+envvar_check_fail=0
+vars='
+  _POSIX2_VERSION
+  _STDBUF_E
+  _STDBUF_I
+  _STDBUF_O
+  BASH_ENV
+  BLOCKSIZE
+  BLOCK_SIZE
+  CDPATH
+  COLUMNS
+  DF_BLOCK_SIZE
+  DU_BLOCK_SIZE
+  ENV
+  LANGUAGE
+  LS_BLOCK_SIZE
+  LS_COLORS
+  OMP_NUM_THREADS
+  POSIXLY_CORRECT
+  QUOTING_STYLE
+  SIMPLE_BACKUP_SUFFIX
+  TABSIZE
+  TERM
+  COLORTERM
+  TIME_STYLE
+  TMPDIR
+  VERSION_CONTROL
+'
+for var in $vars
+do
+  $as_unset $var
+  if eval test \"\${$var+set}\" = set; then
+    echo "$0: the $var environment variable is set --" \
+      ' unset it and rerun this test' >&2
+    envvar_check_fail=1
+  fi
+done
+
+test "$envvar_check_fail" = 1 && exit 1
diff --git a/src/grep/tests/epipe b/src/grep/tests/epipe
new file mode 100755
index 0000000..3b568e3
--- /dev/null
+++ b/src/grep/tests/epipe
@@ -0,0 +1,29 @@
+#!/bin/sh
+# Check that a write failure with errno == EPIPE
+# doesn't cause grep to issue multiple "write error" diagnostics.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+if
+   # Use awk to output a bounded amount of data to the grep in question,
+   # so that the test doesn't loop forever if grep is buggy.
+   # Use an explicit /dev/null for the benefit of older (pre-POSIX) awks.
+   #
+   # Carefully close fd 3 when not needed, as a sanity check.
+   #
+   # Do not use "trap - PIPE" or "trap 'something' PIPE" here, since we may
+   # be running in an environment where SIGPIPE is ignored, and in such an
+   # environment POSIX says that "trap '' PIPE" is all we can do portably.
+   (
+     ${AWK-awk} 'BEGIN { for (i=0; i<1000000; i++) print i; }' /dev/null 3>&- |
+     (trap '' PIPE; exec grep . 2>&3 3>&-) |
+     :
+   ) 3>&1 | (
+     read line1 && echo >&2 "$line1" &&
+     read line2 && echo >&2 "$line2"
+   )
+then fail=1
+else fail=0
+fi
+
+Exit $fail
diff --git a/src/grep/tests/equiv-classes b/src/grep/tests/equiv-classes
new file mode 100755
index 0000000..940efa4
--- /dev/null
+++ b/src/grep/tests/equiv-classes
@@ -0,0 +1,13 @@
+#!/bin/sh
+# Test that equivalence classes work.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+require_compiled_in_MB_support
+
+LC_ALL=en_US.UTF-8
+export LC_ALL
+
+echo à | grep '[[=a=]]' > /dev/null
+Exit $?
diff --git a/src/grep/tests/ere b/src/grep/tests/ere
new file mode 100755
index 0000000..7d2c75b
--- /dev/null
+++ b/src/grep/tests/ere
@@ -0,0 +1,21 @@
+#! /bin/sh
+# Regression test for GNU grep.
+#
+# Copyright (C) 2001, 2006, 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+# . . . and the following by Henry Spencer.
+
+${AWK-awk} -f $abs_top_srcdir/tests/ere.awk $abs_top_srcdir/tests/ere.tests \
+  > ere.script || fail=1
+
+${re_shell-${SHELL-sh}} ere.script || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/ere.awk b/src/grep/tests/ere.awk
new file mode 100644
index 0000000..3b4c629
--- /dev/null
+++ b/src/grep/tests/ere.awk
@@ -0,0 +1,38 @@
+# Copyright (C) 2001, 2006, 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+BEGIN {
+        FS="@";
+        n = 0;
+        printf ("# Generated Spencer ERE Test\n");
+        printf ("failures=0\n");
+}
+
+$0 ~ /^#/  { next; }
+
+NF == 3 {
+#	printf ("status=$(echo '%s' | { grep -E -e '%s' > /dev/null 2>&1; echo $?; cat >/dev/null; })\n",$3, $2);
+        printf ("status=$(echo '%s' | { grep -E -e '%s' > /dev/null 2>&1; echo $?;  })\n",$3, $2);
+        printf ("if test $status -ne %s ; then\n", $1);
+        printf ("\techo Spencer ere test \\#%d failed\n", ++n);
+        printf ("\tfailures=1\n");
+        printf ("fi\n");
+}
+
+NF == 4 {
+# don't alarm the user for now
+#	printf ("echo '%s'|grep -E -e '%s' > /dev/null 2>&1\n",$3, $2);
+#	printf ("if test $? -ne %s ; then\n", $1);
+#	printf ("\techo Expected non conformance \\#%d ... continuing\n", ++n);
+#	printf ("fi\n");
+}
+
+NF == 5 {
+# don't alarm the user for now
+        next;
+}
+
+END { printf ("exit $failures\n"); }
diff --git a/src/grep/tests/ere.tests b/src/grep/tests/ere.tests
new file mode 100644
index 0000000..557d4db
--- /dev/null
+++ b/src/grep/tests/ere.tests
@@ -0,0 +1,222 @@
+0@a@a
+0@abc@abc
+0@abc|de@abc
+0@a|b|c@abc
+0@a(b)c@abc
+2@a(@EPAREN
+0@a\(@a(
+2@a(b@EPAREN
+0@a)@a)@POSIX BOTCH
+0@)@)@POSIX BOTCH
+0@a()b@ab
+0@^abc$@abc
+1@a^b@a^b
+1@a$b@a$b
+0@^@abc
+0@$@abc
+0@^$@@TO CORRECT
+0@$^@@TO CORRECT
+0@^^@@TO CORRECT
+0@$$@@TO CORRECT
+0@a*(^b$)c*@b
+2@|@EMPTY@NO ALTERNATION
+2@*@BADRPT@TO CORRECT
+2@+@BADRPT@TO CORRECT
+2@?@BADRPT@TO CORRECT
+1@&C@PASS
+0@()@abc
+2@a||b@EMPTY@NO ALTERNATION
+2@|ab@EMPTY@NO ALTERNATION
+2@ab|@EMPTY@NO ALTERNATION
+2@(|a)b@EMPTY@NO ALTERNATION
+2@(a|)b@EMPTY@NO ALTERNATION
+2@(*a)@BADRPT@TO CORRECT
+2@(+a)@BADRPT@TO CORRECT
+2@(?a)@BADRPT@TO CORRECT
+2@({1}a)@BADRPT@TO CORRECT
+2@(a|*b)@BADRPT@NO ALTERNATION
+2@(a|+b)@BADRPT@NO ALTERNATION
+2@(a|?b)@BADRPT@NO ALTERNATION
+2@(a|{1}b)@BADRPT@NO ALTERNATION
+2@^*@BADRPT@TO CORRECT
+2@^+@BADRPT@TO CORRECT
+2@^?@BADRPT@TO CORRECT
+2@^{1}@BADRPT@TO CORRECT
+0@a.c@abc
+0@a[bc]d@abd
+0@a\*c@a*c
+0@a\\b@a\b@TO CORRECT
+0@a\\\*b@a\*b@SHELL TROUBLE
+0@a\bc@abc@TO CORRECT
+2@a\@EESCAPE@SHELL TROUBLE
+0@a\\bc@a\bc@TO CORRECT
+0@a\[b@a[b
+2@a[b@EBRACK
+0@a$@a
+1@a$@a$
+1@a\$@a@SHELL TROUBLE
+0@a\$@a$@SHELL TROUBLE
+1@a\\$@a
+1@a\\$@a$@SHELL TROUBLE
+1@a\\$@a\$@SHELL TROUBLE
+0@a\\$@a\@SHEL TROUBLE
+0@ab*c@abc
+0@ab+c@abc
+0@ab?c@abc
+0@{@{@TO CORRECT
+0@{abc@{abc@TO CORRECT
+0@{1@{1
+2@{1}@BADRPT@TO CORRECT
+0@a{b@a{b@TO CORRECT
+0@a{1}b@ab
+0@a{1,}b@ab
+0@a{1,2}b@aab
+0@a{1@a{1
+1@a{1a@aa
+0@a{1a}@a{1a}
+0@a{,2}@a{,2}
+0@a{,}@a{,}
+2@a{}@BADBR
+0@a{1,*}@a{1,,,}
+2@a{1,x@EBRACE@TO CORRECT
+2@a{300}@BADBR@TO CORRECT
+2@a{1,0}@BADBR@TO CORRECT
+0@ab{0,0}c@abcac
+0@ab{0,1}c@abcac
+0@ab{0,3}c@abbcac
+0@ab{1,1}c@acabc
+0@ab{1,3}c@acabc
+0@ab{2,2}c@abcabbc
+0@ab{2,4}c@abcabbc
+2@a**@BADRPT@TO CORRECT
+2@a++@BADRPT@TO CORRECT
+2@a??@BADRPT@TO CORRECT
+2@a*+@BADRPT@TO CORRECT
+2@a*?@BADRPT@TO CORRECT
+2@a+*@BADRPT@TO CORRECT
+2@a+?@BADRPT@TO CORRECT
+2@a?*@BADRPT@TO CORRECT
+2@a?+@BADRPT@TO CORRECT
+2@a{1}{1}@BADRPT@TO CORRECT
+2@a*{1}@BADRPT@TO CORRECT
+2@a+{1}@BADRPT@TO CORRECT
+2@a?{1}@BADRPT@TO CORRECT
+2@a{1}*@BADRPT@TO CORRECT
+2@a{1}+@BADRPT@TO CORRECT
+2@a{1}?@BADRPT@TO CORRECT
+0@a*{b}@a{b}@TO CORRECT
+0@a[b]c@abc
+0@a[ab]c@abc
+0@a[^ab]c@adc
+0@a[]b]c@a]c
+0@a[[b]c@a[c
+0@a[-b]c@a-c
+0@a[^]b]c@adc
+0@a[^-b]c@adc
+0@a[b-]c@a-c
+2@a[b@EBRACK
+2@a[]@EBRACK
+0@a[1-3]c@a2c
+2@a[3-1]c@ERANGE@TO CORRECT
+2@a[1-3-5]c@ERANGE@TO CORRECT
+0@a[[.-.]--]c@a-c@TO CORRECT
+2@a[1-@ERANGE
+2@a[[.@EBRACK
+2@a[[.x@EBRACK
+2@a[[.x.@EBRACK
+2@a[[.x.]@EBRACK@TO CORRECT
+0@a[[.x.]]@ax@TO CORRECT
+2@a[[.x,.]]@ECOLLATE@TO CORRECT
+0@a[[.one.]]b@a1b@TO CORRECT
+2@a[[.notdef.]]b@ECOLLATE@TO CORRECT
+0@a[[.].]]b@a]b@TO CORRECT
+0@a[[:alpha:]]c@abc
+2@a[[:notdef:]]c@ECTYPE
+2@a[[:@EBRACK
+2@a[[:alpha@EBRACK
+2@a[[:alpha:]@EBRACK
+2@a[[:alpha,:]@ECTYPE
+2@a[[:]:]]b@ECTYPE
+2@a[[:-:]]b@ECTYPE
+2@a[[:alph:]]@ECTYPE
+2@a[[:alphabet:]]@ECTYPE
+0@[[:digit:]]+@a019b
+0@[[:lower:]]+@AabC
+0@[[:upper:]]+@aBCd
+0@[[:xdigit:]]+@p0f3Cq
+0@a[[=b=]]c@abc@TO CORRECT
+2@a[[=@EBRACK
+2@a[[=b@EBRACK
+2@a[[=b=@EBRACK
+2@a[[=b=]@EBRACK@TO CORRECT
+2@a[[=b,=]]@ECOLLATE@TO CORRECT
+0@a[[=one=]]b@a1b@TO CORRECT
+0@a(((b)))c@abc
+0@a(b|(c))d@abd
+0@a(b*|c)d@abbd
+0@a[ab]{20}@aaaaabaaaabaaaabaaaab
+0@a[ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab]@aaaaabaaaabaaaabaaaab
+0@a[ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab](wee|week)(knights|night)@aaaaabaaaabaaaabaaaabweeknights
+0@12345678901234567890123456789@a12345678901234567890123456789b
+0@123456789012345678901234567890@a123456789012345678901234567890b
+0@1234567890123456789012345678901@a1234567890123456789012345678901b
+0@12345678901234567890123456789012@a12345678901234567890123456789012b
+0@123456789012345678901234567890123@a123456789012345678901234567890123b
+0@1234567890123456789012345678901234567890123456789012345678901234567890@a1234567890123456789012345678901234567890123456789012345678901234567890b
+0@[ab][cd][ef][gh][ij][kl][mn]@xacegikmoq
+0@[ab][cd][ef][gh][ij][kl][mn][op]@xacegikmoq
+0@[ab][cd][ef][gh][ij][kl][mn][op][qr]@xacegikmoqy
+0@[ab][cd][ef][gh][ij][kl][mn][op][q]@xacegikmoqy
+0@abc@xabcy
+0@aBc@Abc@TO CORRECT
+0@a[Bc]*d@abBCcd@TO CORRECT
+0@0[[:upper:]]1@0a1@TO CORRECT
+0@0[[:lower:]]1@0A1@TO CORRECT
+1@a[^b]c@abc
+1@a[^b]c@aBc@TO CORRECT
+0@a[^b]c@adc
+0@[a]b[c]@abc
+0@[a]b[a]@aba
+0@[abc]b[abc]@abc
+0@[abc]b[abd]@abd
+0@a(b?c)+d@accd
+0@(wee|week)(knights|night)@weeknights
+0@(we|wee|week|frob)(knights|night|day)@weeknights
+0@a[bc]d@xyzaaabcaababdacd
+0@a[ab]c@aaabc
+0@a*@b
+0@/\*.*\*/@/*x*/
+0@/\*.*\*/@/*x*/y/*z*/
+0@/\*([^*]|\*[^/])*\*/@/*x*/
+0@/\*([^*]|\*[^/])*\*/@/*x*/y/*z*/
+0@/\*([^*]|\*[^/])*\*/@/*x**/y/*z*/
+0@/\*([^*]|\*+[^*/])*\*+/@/*x*/
+0@/\*([^*]|\*+[^*/])*\*+/@/*x*/y/*z*/
+0@/\*([^*]|\*+[^*/])*\*+/@/*x**/y/*z*/
+0@/\*([^*]|\*+[^*/])*\*+/@/*x****/y/*z*/
+0@/\*([^*]|\*+[^*/])*\*+/@/*x**x*/y/*z*/
+0@/\*([^*]|\*+[^*/])*\*+/@/*x***x/y/*z*/
+0@aZb@a@TO CORRECT
+0@[[:<:]]a@a@TO CORRECT
+1@[[:<:]]a@ba@TO CORRECT
+0@[[:<:]]a@-a@TO CORRECT
+0@a[[:>:]]@a@TO CORRECT
+1@a[[:>:]]@ab@TO CORRECT
+0@a[[:>:]]@a-@TO CORRECT
+0@[[:<:]]a.c[[:>:]]@axcd-dayc-dazce-abc@TO CORRECT
+0@[[:<:]]a.c[[:>:]]@axcd-dayc-dazce-abc-q@TO CORRECT
+0@[[:<:]]a.c[[:>:]]@axc-dayc-dazce-abc@TO CORRECT
+0@[[:<:]]b.c[[:>:]]@a_bxc-byc_d-bzc-q@TO CORRECT
+0@[[:<:]].x..[[:>:]]@y_xa_-_xb_y-_xc_-axdc@TO CORRECT
+1@[[:<:]]a_b[[:>:]]@x_a_b@TO CORRECT
+0@(A[1])|(A[2])|(A[3])|(A[4])|(A[5])|(A[6])|(A[7])|(A[8])|(A[9])|(A[A])@A1
+0@abcdefghijklmnop@abcdefghijklmnop
+0@abcdefghijklmnopqrstuv@abcdefghijklmnopqrstuv
+0@CC[13]1|a{21}[23][EO][123][Es][12]a{15}aa[34][EW]aaaaaaa[X]a@CC11
+0@a?b@ab
+2@b{1000000000}@ESIZE
+0@)@)
+1@)@x
+0@\()\((a\())(b))@()(a()b)
+# This would erroneously match from grep-3.2 to grep-3.5
+1@a+a+a@aa
diff --git a/src/grep/tests/euc-mb b/src/grep/tests/euc-mb
new file mode 100755
index 0000000..c639374
--- /dev/null
+++ b/src/grep/tests/euc-mb
@@ -0,0 +1,47 @@
+#!/bin/sh
+# test that matches starting in the middle of a multibyte char aren't rejected
+# too greedily.
+# Derived from https://savannah.gnu.org/bugs/?23814
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+# Add "." to PATH for the use of get-mb-cur-max.
+path_prepend_ .
+
+require_compiled_in_MB_support
+
+locale=ja_JP.EUC-JP
+
+make_input () {
+  echo "$1" | tr AB '\244\263'
+}
+
+euc_grep () {
+  pat=$(make_input "$1")
+  LC_ALL=$locale grep "$pat"
+}
+
+case $(get-mb-cur-max $locale) in
+  2|3) ;;
+  *) skip_ 'EUC-JP locale not found' ;;
+esac
+
+fail=0
+
+# Does EUC-JP work at all?
+make_input BABA |euc_grep AB && fail=1
+
+# Here are two cases in which a KWSet search matches in the middle
+# of a multibyte character.  The first ensures that the DFA matcher
+# finds the real match at the end of line.  The second ensures that
+# while the KWSet match found a false positive, the DFA matcher
+# determines there is no match after all.
+make_input BABAAB |euc_grep AB > out || fail=1
+make_input BABAAB > exp || framework_failure_
+compare exp out || fail=1
+make_input BABABA |returns_ 1 euc_grep AB || fail=1
+make_input BABABA |returns_ 1 euc_grep '^x\|AB' || fail=1
+
+# -P supports only unibyte and UTF-8 locales.
+returns_ 2 env LC_ALL=$locale grep -P x /dev/null || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/false-match-mb-non-utf8 b/src/grep/tests/false-match-mb-non-utf8
new file mode 100755
index 0000000..e618996
--- /dev/null
+++ b/src/grep/tests/false-match-mb-non-utf8
@@ -0,0 +1,38 @@
+#! /bin/sh
+# Test for false matches in grep 2.19..2.26 in multibyte, non-UTF8 locales
+#
+# Copyright (C) 2016-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+# Add "." to PATH for the use of get-mb-cur-max.
+path_prepend_ .
+
+fail=0
+
+loc=zh_CN.gb18030
+test "$(get-mb-cur-max $loc)" = 4 || skip_ "no support for the $loc locale"
+
+# This must not match: the input is a single character, \uC9 followed
+# by a newline.  But it just so happens that that character is made up
+# of four bytes, the last of which is the digit, 7, and grep's DFA
+# matcher would mistakenly report that ".*7" matches that input line.
+printf '\2010\2077\n' > in || framework_failure_
+returns_ 1 env LC_ALL=$loc grep -E '.*7' in || fail=1
+
+returns_ 1 env LC_ALL=$loc grep -E '.{0,1}7' in || fail=1
+
+returns_ 1 env LC_ALL=$loc grep -E '.?7' in || fail=1
+
+# Similar for the \ue9 code point, which ends in an "m" byte.
+loc=zh_HK.big5hkscs
+test "$(get-mb-cur-max $loc)" = 2 || skip_ "no support for the $loc locale"
+
+printf '\210m\n' > in || framework_failure_
+returns_ 1 env LC_ALL=$loc grep '.*m' in || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/fedora b/src/grep/tests/fedora
new file mode 100755
index 0000000..43650f3
--- /dev/null
+++ b/src/grep/tests/fedora
@@ -0,0 +1,103 @@
+#!/bin/sh
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+# GREP Regression test suite for Fedora bugs and fixes
+# (c) 2008 Lubomir Rintel
+# Licensed under the same terms as GNU Grep itself
+
+if [ -t 1 ]
+then
+        # Colored output on terminal
+        G='\033[32m'
+        R='\033[31m'
+        D='\033[0m'
+fi
+
+ok ()	{ printf "${G}OK${D}"; }
+fail () { printf "${R}FAIL${D} (See ${U})"; failures=1; }
+
+U=https://bugzilla.redhat.com/show_bug.cgi?id=116909
+printf "fgrep false negatives: "
+cat > 116909.list <<EOF
+a
+b
+c
+EOF
+cat > 116909.in <<EOF
+a
+barn
+c
+EOF
+cat > 116909.out <<EOF
+a
+c
+EOF
+grep -F -w -f 116909.list 116909.in > actual || fail
+compare 116909.out actual && ok || fail
+
+U=https://bugzilla.redhat.com/show_bug.cgi?id=123362
+printf 'bad handling of brackets in UTF-8: '
+echo Y > 123362.out
+echo Y | LC_ALL=de_DE.UTF-8 grep -i '[y,Y]' > actual || fail
+compare 123362.out actual && ok || fail
+
+U=https://bugzilla.redhat.com/show_bug.cgi?id=112869
+printf 'crash with \\W: '
+echo '<form>' > 112869.out
+LANG=it_IT grep -iE '\Wform\W' 112869.out > actual || fail
+compare 112869.out actual && ok || fail
+
+if ( timeout --version ) > /dev/null 2>&1; then
+
+  U=https://bugzilla.redhat.com/show_bug.cgi?id=189580
+  printf 'grep -D skip opening a special file: '
+  returns_ 124 timeout 10 grep -D skip foo /dev/zero && fail || ok
+
+  U=https://bugzilla.redhat.com/show_bug.cgi?id=169524
+  printf 'grep -Fw looping infinitely: '
+  echo foobar | returns_ 124 timeout 10 grep -Fw "" && fail || ok
+
+  U=https://bugzilla.redhat.com/show_bug.cgi?id=140781
+  printf 'fgrep hangs on binary files: '
+  returns_ 124 timeout 10 grep -F grep "$abs_top_builddir/src/grep" \
+    > /dev/null && fail || ok
+
+fi
+
+U=https://bugzilla.redhat.com/show_bug.cgi?id=161700
+printf 'grep -Fw fails to match anything: '
+echo test > 161700.out
+grep -Fw test 161700.out > actual || fail
+compare 161700.out actual && ok || fail
+
+U=https://bugzilla.redhat.com/show_bug.cgi?id=179698
+printf 'grep -w broken in non-utf8 multibyte locales: '
+echo za a > 179698.out
+LANG=ja_JP.eucjp grep -w a 179698.out > actual || fail
+compare 179698.out actual && ok || fail
+
+# Skip the rest of tests in compiled without PCRE
+echo a |grep -P a >/dev/null || Exit $failures
+
+U=https://bugzilla.redhat.com/show_bug.cgi?id=171379
+printf 'grep -P crashes on whitespace lines: '
+echo '   ' > 171379.out
+grep -P '^\s+$' 171379.out > actual || fail
+compare 171379.out actual && ok || fail
+
+U=https://bugzilla.redhat.com/show_bug.cgi?id=204255
+printf '%s' "-e '' does not work if not a first parameter: "
+echo test | grep -e 'HighlightThis' -e '' > 204255.first
+echo test | grep -e '' -e 'HighlightThis' > 204255.second
+diff 204255.first 204255.second && ok || fail
+
+U=https://bugzilla.redhat.com/show_bug.cgi?id=324781
+printf 'bad handling of line breaks with grep -P #1: '
+printf 'a\na' | grep -P '[^a]' >/dev/null && fail || ok
+
+# This is mostly a check that fix for above doesn't break -P further
+printf '%s' "bad handling of line breaks with grep -P #2: "
+printf 'a\na' | grep -P '[^b].[^b]' >/dev/null && fail || ok
+
+Exit $failures
diff --git a/src/grep/tests/fgrep-infloop b/src/grep/tests/fgrep-infloop
new file mode 100755
index 0000000..015ec74
--- /dev/null
+++ b/src/grep/tests/fgrep-infloop
@@ -0,0 +1,27 @@
+#!/bin/sh
+# This would infloop for grep-2.6.1
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+require_timeout_
+require_compiled_in_MB_support
+
+encode() { echo "$1" | tr ABC '\357\274\241'; }
+
+encode ABC > in || framework_failure_
+fail=0
+
+for LOC in en_US.UTF-8 $LOCALE_FR_UTF8; do
+  out=out1-$LOC
+  LC_ALL=$LOC timeout 10s grep -F "$(encode BC)" in > $out
+  status=$?
+  if test $status -eq 0; then
+    compare in $out
+  elif test $status -eq 1; then
+    compare_dev_null_ /dev/null $out
+  else
+    test $status -eq 2
+  fi || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/fgrep-longest b/src/grep/tests/fgrep-longest
new file mode 100755
index 0000000..9fd9879
--- /dev/null
+++ b/src/grep/tests/fgrep-longest
@@ -0,0 +1,23 @@
+#! /bin/sh
+# With multiple matches, grep -Fo could print a shorter one.
+# This bug affected grep versions 2.26 through 2.27.
+#
+# Copyright (C) 2017-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+# The erroneous versions would print "c", rather than the longer match, "bce".
+printf 'abce\n' > in || framework_failure_
+printf 'abcd\nc\nbce\n' > pat || framework_failure_
+printf 'bce\n' > exp || framework_failure_
+
+LC_ALL=C grep -Fof pat in > out || fail=1
+compare exp out || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/file b/src/grep/tests/file
new file mode 100755
index 0000000..236d9f0
--- /dev/null
+++ b/src/grep/tests/file
@@ -0,0 +1,63 @@
+#! /bin/sh
+# Test for POSIX options for grep:
+# grep -E -f pattern_file file
+# grep -F -f pattern_file file
+# grep -G -f pattern_file file
+#
+# Copyright (C) 2001, 2006, 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+cat <<EOF >patfile
+radar
+MILES
+GNU
+EOF
+
+# match
+echo "miles" |  grep -i -E -f patfile > /dev/null 2>&1
+if test $? -ne 0 ; then
+        echo "File_pattern: Wrong status code, test \#1 failed"
+        fail=1
+fi
+
+# match
+echo "GNU" | grep -G -f patfile  > /dev/null 2>&1
+if test $? -ne 0 ; then
+        echo "File_pattern: Wrong status code, test \#2 failed"
+        fail=1
+fi
+
+# checking for no match
+echo "ridar" | grep -F -f patfile > /dev/null 2>&1
+if test $? -ne 1 ; then
+        echo "File_pattern: Wrong status code, test \#3 failed"
+        fail=1
+fi
+
+cat <<EOF >patfile
+
+EOF
+# empty pattern : every match
+echo "abbcd" | grep -F -f patfile > /dev/null 2>&1
+if test $? -ne 0 ; then
+        echo "File_pattern: Wrong status code, test \#4 failed"
+        fail=1
+fi
+
+cp /dev/null patfile
+
+# null pattern : no match
+echo "abbcd" | grep -F -f patfile > /dev/null 2>&1
+if test $? -ne 1 ; then
+        echo "File_pattern: Wrong status code, test \#5 failed"
+        fail=1
+fi
+
+Exit $fail
diff --git a/src/grep/tests/filename-lineno.pl b/src/grep/tests/filename-lineno.pl
new file mode 100755
index 0000000..1e84b45
--- /dev/null
+++ b/src/grep/tests/filename-lineno.pl
@@ -0,0 +1,130 @@
+#!/usr/bin/perl
+# Prior to 2.26, an invalid regexp in a -f-specified file would elicit
+# a diagnostic like "Unmatched [ or [^", with no indication of the
+# file or line number from which the offending regular expression came.
+# With 2.26, now, each such diagnostic has a "FILENAME:LINENO: " prefix.
+
+# Copyright (C) 2016-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+use strict;
+
+(my $program_name = $0) =~ s|.*/||;
+
+my $prog = 'grep';
+my $full_prog_name = `$prog --no-such-option 2>&1`;
+$full_prog_name =~ s/:.*//s;
+$prog = $full_prog_name if $full_prog_name;
+
+# Turn off localization of executable's output.
+@ENV{qw(LANGUAGE LANG LC_ALL)} = ('C') x 3;
+
+# There are at least two variants of one diagnostic:
+#   - Unmatched [, [^, [:, [., or [=
+#   - Unmatched [ or [^
+# Transform each to this: "Unmatched [..."
+my $err_subst = {ERR_SUBST => 's/(: Unmatched \[).*/$1.../'};
+
+my $no_pcre = "$prog: Perl matching not supported in a --disable-perl-regexp build\n";
+
+my @Tests =
+  (
+   # Show that grep now includes filename:lineno in the diagnostic:
+   ['invalid-re', '-f g', {AUX=>{g=>"1\n2\n3\n4[[\n"}}, {EXIT=>2},
+    $err_subst,
+    {ERR => "$prog: g:4: Unmatched [...\n"},
+   ],
+
+   # Show that with two or more errors, grep now prints all diagnostics:
+   ['invalid-re-2-files', '-f g -f h', {EXIT=>2},
+    {AUX=>{g=>"1\n2[[\n3\n4[[\n"}},
+    {AUX=>{h=>"5\n6\n7[[\n"}},
+    $err_subst,
+    {ERR => "$prog: g:2: Unmatched [...\n"
+         . "$prog: g:4: Unmatched [...\n"
+         . "$prog: h:3: Unmatched [...\n"
+    },
+   ],
+
+   # Like the above, but on the other lines.
+   ['invalid-re-2-files2', '-f g -f h', {EXIT=>2},
+    {AUX=>{g=>"1[[\n2\n3[[\n4\n"}},
+    {AUX=>{h=>"5[[\n6[[\n7\n"}},
+    $err_subst,
+    {ERR => "$prog: g:1: Unmatched [...\n"
+         . "$prog: g:3: Unmatched [...\n"
+         . "$prog: h:1: Unmatched [...\n"
+         . "$prog: h:2: Unmatched [...\n"
+    },
+   ],
+
+   # Make sure the line numbers are right when some regexps are duplicates.
+   ['invalid-re-line-numbers', '-f g -f h', {EXIT=>2},
+    {AUX=>{g=>"1[[\n\n3[[\n\n5[[\n"}},
+    {AUX=>{h=>"1[[\n\n\n4[[\n\n6[[\n"}},
+    $err_subst,
+    {ERR => "$prog: g:1: Unmatched [...\n"
+         . "$prog: g:3: Unmatched [...\n"
+         . "$prog: g:5: Unmatched [...\n"
+         . "$prog: h:4: Unmatched [...\n"
+         . "$prog: h:6: Unmatched [...\n"
+    },
+   ],
+
+   # Show that with two '-e'-specified erroneous regexps,
+   # there is no file name or line number.
+   ['invalid-re-2e', '-e "1[[" -e "2[["', {EXIT=>2},
+    $err_subst,
+    {ERR => "$prog: Unmatched [...\n" x 2},
+   ],
+
+   # Test unmatched ) as well.  It is OK with -E and an error with -G and -P.
+   ['invalid-re-E-paren', '-E ")"', {IN=>''}, {EXIT=>1}],
+   ['invalid-re-E-star-paren', '-E ".*)"', {IN=>''}, {EXIT=>1}],
+   ['invalid-re-G-paren', '-G "\\)"', {EXIT=>2},
+    {ERR => "$prog: Unmatched ) or \\)\n"},
+   ],
+   ['invalid-re-G-star-paren', '-G "a.*\\)"', {EXIT=>2},
+    {ERR => "$prog: Unmatched ) or \\)\n"},
+   ],
+   ['invalid-re-P-paren', '-P ")"', {EXIT=>2},
+    {ERR => $ENV{PCRE_WORKS} == 1
+       ? "$prog: unmatched parentheses\n"
+       : $no_pcre
+    },
+   ],
+   ['invalid-re-P-star-paren', '-P "a.*)"', {EXIT=>2},
+    {ERR => $ENV{PCRE_WORKS} == 1
+       ? "$prog: unmatched parentheses\n"
+       : $no_pcre
+    },
+   ],
+
+   # Prior to grep-3.6, the name of the offending file was not printed.
+   ['backtracking-with-file', '-P "((a+)*)+$"', {EXIT=>2},
+    {IN=>{f=>"a"x20 ."b"}},
+    {ERR => $ENV{PCRE_WORKS} == 1
+       ? "$prog: f: exceeded PCRE's backtracking limit\n"
+       : $no_pcre
+    },
+   ],
+
+  );
+
+my $save_temps = $ENV{DEBUG};
+my $verbose = $ENV{VERBOSE};
+
+my $fail = run_tests ($program_name, $prog, \@Tests, $save_temps, $verbose);
+exit $fail;
diff --git a/src/grep/tests/fmbtest b/src/grep/tests/fmbtest
new file mode 100755
index 0000000..5fada35
--- /dev/null
+++ b/src/grep/tests/fmbtest
@@ -0,0 +1,126 @@
+#! /bin/sh
+# Copyright (C) 2001, 2006, 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+cz=cs_CZ.UTF-8
+
+# If cs_CZ.UTF-8 locale doesn't work, skip this test.
+LC_ALL=$cz locale -k LC_CTYPE 2>/dev/null | grep -q charmap.*UTF-8 \
+  || skip_ this system lacks the $cz locale
+
+# If matching is done in single-byte mode, skip this test too
+printf 'é\n' | LC_ALL=$cz grep -Eq '^[é]{2}$'
+case $? in
+  0) skip_ "built without multi-byte support";;
+  1) ;;
+  *) fail_ "unexpected exit status: $?";;
+esac
+
+failures=0
+
+cat > csinput <<EOF
+01 Žluťoučká číše
+ČíŠE 02
+03 Z číší Čiší cosi
+04 Čí
+Še 05
+06 ČČČČČČČíšČÍŠčíš
+07 ČČČ ČČČČíšČÍŠčíšEEEE
+čAs 08
+09Čapka
+10ČaSy se měnÍ
+ČÍšE11
+Čas12
+𝇕ČÍšE𝇓13
+ŽČÍšE𝇓14
+𝇕ČÍšEŽ15
+ŽČÍšEŽ16
+ČÍšE𝇓17
+ČÍšEŽ18
+19𝇕ČÍše
+20ŽČÍše
+EOF
+cat > cspatfile <<EOF
+ČÍšE
+Čas
+EOF
+
+for mode in F G E; do
+
+test1=$(echo $(LC_ALL=$cz grep -${mode} -f cspatfile csinput |
+               tr -cs '0-9' '[ *]'))
+if test "$test1" != "11 12 13 14 15 16 17 18"; then
+  echo "Test #1 ${mode} failed: $test1"
+  failures=1
+fi
+
+test2=$(echo $(LC_ALL=$cz grep -${mode}i -f cspatfile csinput |
+               tr -cs '0-9' '[ *]'))
+if test "$test2" != "01 02 07 08 10 11 12 13 14 15 16 17 18 19 20"; then
+  echo "Test #2 ${mode} failed: $test2"
+  failures=1
+fi
+
+test3=$(echo $(LC_ALL=$cz grep -${mode}i -e 'ČÍšE' -e 'Čas' csinput |
+               tr -cs '0-9' '[ *]'))
+if test "$test3" != "01 02 07 08 10 11 12 13 14 15 16 17 18 19 20"; then
+  echo "Test #3 ${mode} failed: $test3"
+  failures=1
+fi
+
+# Skip the next test - known to fail. TAA.
+#test4=$(echo $(LC_ALL=$cz; export LC_ALL
+#               grep -${mode}iw -f cspatfile csinput |
+#                 sed 's/[^0123456789]/ /g'))
+#if test "$test4" != "01 02 08 13 17 19"; then
+#  echo "Test #4 ${mode} failed: $test4"
+#  failures=1
+#fi
+
+# Test that --color=always does not depend on individual pattern order
+# within the pattern list, and that a longer match is preferred to a
+# shorter one starting at the same point.
+test6="$(echo 'Cosi tu ČišÍ...' \
+  | LC_ALL=$cz grep --color=always -${mode}i -e 'čiš' -e 'čiší')"
+if echo "$test6" \
+  | LC_ALL=C grep -q 'Cosi tu .*\[.*m\(.\[K\)\?ČišÍ.*\[.*m\(.\[K\)\?\.\.\.'; \
+then
+  :
+else
+  echo "Test #6 ${mode} failed: $test6"
+  failures=1
+fi
+
+# Test that --color=always does not depend on individual pattern order
+# within the pattern list, and that a longer match is preferred to a
+# shorter one starting at the same point.
+test7="$(echo 'Cosi tu ČišÍ...' \
+  | LC_ALL=$cz grep --color=always -${mode}i -e 'čiší' -e 'čiš')"
+if echo "$test7" \
+  | LC_ALL=C grep -q 'Cosi tu .*\[.*m\(.\[K\)\?ČišÍ.*\[.*m\(.\[K\)\?\.\.\.'; \
+then
+  :
+else
+  echo "Test #7 ${mode} failed: $test7"
+  failures=1
+fi
+
+done
+
+for mode in G E; do
+
+test8=$(echo $(LC_ALL=$cz grep -${mode}i -e 'Č.šE' -e 'Č[a-f]s' csinput |
+               tr -cs '0-9' '[ *]'))
+if test "$test8" != "01 02 07 08 10 11 12 13 14 15 16 17 18 19 20"; then
+  echo "Test #8 ${mode} failed: $test8"
+  failures=1
+fi
+
+done
+
+Exit $failures
diff --git a/src/grep/tests/foad1 b/src/grep/tests/foad1
new file mode 100755
index 0000000..588107d
--- /dev/null
+++ b/src/grep/tests/foad1
@@ -0,0 +1,211 @@
+#! /bin/sh
+# Test various combinations of command-line options.
+#
+# Copyright (C) 2001, 2006, 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+#
+# This set of tests was started by Julian Foad.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+failures=0
+
+# grep_test INPUT EXPECTED_OUTPUT PATTERN_AND_OPTIONS...
+# Run "grep" with the given INPUT, pattern and options, and check that
+# the output is EXPECTED_OUTPUT.  If not, print a message and set 'failures'.
+# "/" represents a newline within INPUT and EXPECTED_OUTPUT.
+grep_test ()
+{
+  INPUT="$1"
+  EXPECT="$2"
+  shift 2
+  OUTPUT=$(printf %s "$INPUT" | tr "/" "\n" | grep "$@" | tr "\n" "/")
+  if test "$OUTPUT" != "$EXPECT" || test "$VERBOSE" = "yes"; then
+    echo "Testing:  grep $@"
+    test "$LC_ALL" != C && test "$LC_ALL" != "" && echo "  LC_ALL: \"$LC_ALL\""
+    echo "  input:  \"$INPUT\""
+    echo "  output: \"$OUTPUT\""
+  fi
+  if test "$OUTPUT" != "$EXPECT"; then
+    echo "  expect: \"$EXPECT\""
+    echo "FAIL"
+    failures=1
+  fi
+}
+
+
+# Test "--only-matching" ("-o") option
+
+# "-o" with "-i" should output an exact copy of the matching input text.
+grep_test "WordA/wordB/WORDC/" "Word/word/WORD/" "word" -o -i
+grep_test "WordA/wordB/WORDC/" "Word/word/WORD/" "Word" -o -i
+grep_test "WordA/wordB/WORDC/" "Word/word/WORD/" "WORD" -o -i
+
+# Should display the line number (-n), octet offset (-b), or file name
+# (-H) of every match, not just of the first match on each input line.
+# Check it both with and without -i because of the separate code paths.
+# Also check what it does when lines of context are specified.
+grep_test "wA wB/wC/" "1:wA/1:wB/2:wC/" "w." -o -n
+grep_test "wA wB/wC/" "1:wA/1:wB/2:wC/" "w." -o -n -i
+grep_test "wA wB/wC/" "1:wA/1:wB/2:wC/" "w." -o -n -3 2>/dev/null
+grep_test "XwA YwB/ZwC/" "1:wA/5:wB/9:wC/" "w." -o -b
+grep_test "XwA YwB/ZwC/" "1:wA/5:wB/9:wC/" "w." -o -b -i
+grep_test "XwA YwB/ZwC/" "1:wA/5:wB/9:wC/" "w." -o -b -3 2>/dev/null
+grep_test "XwA YwB/ZwC/" "1:w/5:w/9:w/" "w" -F -o -b
+grep_test "XwA YwB/ZwC/" "1:w/5:w/9:w/" "w" -F -o -b -i
+grep_test "XwA YwB/ZwC/" "1:w/5:w/9:w/" "w" -F -o -b -3 2>/dev/null
+grep_test "wA wB/" "(standard input):wA/(standard input):wB/" "w." -o -H
+grep_test "wA wB/" "(standard input):wA/(standard input):wB/" "w." -o -H -i
+grep_test "wA wB/" "(standard input):wA/(standard input):wB/" "w." -o -H -3 2>/dev/null
+
+# Combination of -h and -H
+grep_test "wA wB/" "wA wB/" "w."
+grep_test "wA wB/" "wA wB/" "w." -h
+grep_test "wA wB/" "wA wB/" "w." -H -h
+grep_test "wA wB/" "(standard input):wA wB/" "w." -H
+grep_test "wA wB/" "(standard input):wA wB/" "w." -h -H
+
+# End of a previous match should not match a "start of ..." expression.
+grep_test "word_word/" "word_/" "^word_*" -o
+grep_test "wordword/" "word/" "\<word" -o
+
+
+# Test "--color" option
+
+CB=""
+CE=""
+
+# "--color" with "-i" should output an exact copy of the matching input text.
+grep_test "WordA/wordb/WORDC/" "${CB}Word${CE}A/${CB}word${CE}b/${CB}WORD${CE}C/" "word" --color=always -i
+grep_test "WordA/wordb/WORDC/" "${CB}Word${CE}A/${CB}word${CE}b/${CB}WORD${CE}C/" "Word" --color=always -i
+grep_test "WordA/wordb/WORDC/" "${CB}Word${CE}A/${CB}word${CE}b/${CB}WORD${CE}C/" "WORD" --color=always -i
+
+# End of a previous match should not match a "start of ..." expression.
+grep_test "word_word/" "${CB}word_${CE}word/" "^word_*" --color=always
+grep_test "wordword/" "${CB}word${CE}word/" "\<word" --color=always
+
+
+# Test combination of "-m" with "-A" and anchors.
+# Based on a report from Pavol Gono.
+grep_test "4/40/"  "4/40/"  "^4$" -m1 -A99
+grep_test "4/04/"  "4/04/"  "^4$" -m1 -A99
+grep_test "4/444/" "4/444/" "^4$" -m1 -A99
+grep_test "4/40/"  "4/40/"  "^4"  -m1 -A99
+grep_test "4/04/"  "4/04/"  "^4"  -m1 -A99
+grep_test "4/444/" "4/444/" "^4"  -m1 -A99
+grep_test "4/40/"  "4/40/"  "4$"  -m1 -A99
+grep_test "4/04/"  "4/04/"  "4$"  -m1 -A99
+grep_test "4/444/" "4/444/" "4$"  -m1 -A99
+
+
+# Test for "-F -w" bugs.  Thanks to Gordon Lack for these two.
+grep_test "A/CX/B/C/" "A/B/C/" -wF -e A -e B -e C
+grep_test "LIN7C 55327/" "" -wF -e 5327 -e 5532
+
+# Test for non-empty matches following empty ones.
+grep_test 'xyz/' 'y/' -o 'y*'
+grep_test 'xyz/' "x${CB}y${CE}z/" --color=always 'y*'
+
+# Test for increasing/decreasing-length word matches,
+# for independence from pattern order within the pattern list,
+# and for preferring the longest match at a given position.
+x0='a bb ccc dddd/'
+x1='dddd ccc bb a/'
+x2='bcd abcd abc bc bcd abc/'
+x3='bc abcd bc/'
+y0="a ${CB}bb${CE} ${CB}ccc${CE} dddd/"
+y1="dddd ${CB}ccc${CE} ${CB}bb${CE} a/"
+y2="bcd abcd abc ${CB}bc${CE} bcd abc/"
+y3="${CB}bc${CE} abcd ${CB}bc${CE}/"
+grep_test "$x0" "$y0" -E --color=always -e bb -e cc -e ccc
+grep_test "$x0" "$y0" -F --color=always -e bb -e cc -e ccc
+grep_test "$x0" "$y0" -E --color=always -e bb -e ccc -e cc
+grep_test "$x0" "$y0" -F --color=always -e bb -e ccc -e cc
+grep_test "$x0" "$y0" -E -w --color=always -e bb -e ccc
+grep_test "$x0" "$y0" -F -w --color=always -e bb -e ccc
+grep_test "$x0" "$y0" -E -w --color=always -e ccc -e bb
+grep_test "$x0" "$y0" -F -w --color=always -e ccc -e bb
+grep_test "$x1" "$y1" -E -w --color=always -e bb -e ccc
+grep_test "$x1" "$y1" -F -w --color=always -e bb -e ccc
+grep_test "$x1" "$y1" -E -w --color=always -e ccc -e bb
+grep_test "$x1" "$y1" -F -w --color=always -e ccc -e bb
+grep_test "$x2" "$y2" -E -w --color=always bc
+grep_test "$x2" "$y2" -F -w --color=always bc
+grep_test "$x3" "$y3" -E -w --color=always bc
+grep_test "$x3" "$y3" -F -w --color=always bc
+
+# Bug#25655
+grep_test .tar/ .tar/ -e '\.tar' -e '\.tbz'
+grep_test .tar/ .tar/ -o -e '\.tar' -e 'tar'
+grep_test '$*.[^\/' '$*.[^\/' -o -e '\$\*\.\[\^\\' -e abc
+grep_test '$*.[^\/(+?{|/' '$*.[^\/(+?{|/' -o -E \
+          -e '\$\*\.\[\^\\' -e '\(\+\?\{\|'
+
+# Skip the rest of the tests - known to fail. TAA.
+Exit $failures
+
+# The rest of this file is meant to be executed under this locale.
+LC_ALL=cs_CZ.UTF-8; export LC_ALL
+# If the UTF-8 locale doesn't work, skip these tests silently.
+locale -k LC_CTYPE 2>/dev/null | grep -q "charmap.*UTF-8" || Exit $failures
+
+# Test character class erroneously matching a '[' character.
+grep_test "[/" "" "[[:alpha:]]" -E
+
+for mode in F G E; do
+  # Hint:  pipe the output of these tests in
+  #        "| LESS= LESSCHARSET=ascii less".
+  # LETTER N WITH TILDE is U+00F1 and U+00D1.
+  # LETTER Y WITH DIAERESIS is U+00FF and U+0178.
+  grep_test 'añÿb/AÑŸB/' 'ñÿ/ÑŸ/' 'ñÿ' -o -i -$mode
+  grep_test 'añÿb/AÑŸB/' 'ñÿ/ÑŸ/' 'ÑŸ' -o -i -$mode
+  grep_test 'añÿb/AÑŸB/' "a${CB}ñÿ${CE}b/A${CB}ÑŸ${CE}B/" 'ñÿ' --color=always -i -$mode
+  grep_test 'añÿb/AÑŸB/' "a${CB}ñÿ${CE}b/A${CB}ÑŸ${CE}B/" 'ÑŸ' --color=always -i -$mode
+
+  # POSIX (about -i):  ... each character in the string is matched
+  # against the pattern, not only the character, but also its case
+  # counterpart (if any), shall be matched.
+  # The following were chosen because of their trickiness due to the
+  # differing UTF-8 octet length of their counterpart and to the
+  # non-reflexivity of their mapping.
+  # Beware of homographs!  Look carefully at the actual octets.
+
+  # lc(U+0130 LATIN CAPITAL LETTER I WITH DOT ABOVE) = U+0069 LATIN SMALL LETTER I
+  grep_test 'aİb/' "a${CB}İ${CE}b/" 'i' --color=always -i -$mode
+  grep_test 'aib/' ''               'İ' --color=always -i -$mode
+  grep_test 'aİb/' ''               'I' --color=always -i -$mode
+  # uc(U+0131 LATIN SMALL LETTER DOTLESS I)          = U+0049 LATIN CAPITAL LETTER I
+  grep_test 'aıb/' "a${CB}ı${CE}b/" 'I' --color=always -i -$mode
+  grep_test 'aIb/' ''               'ı' --color=always -i -$mode
+  grep_test 'aıb/' ''               'i' --color=always -i -$mode
+  # uc(U+017F LATIN SMALL LETTER LONG S)             = U+0053 LATIN CAPITAL LETTER S
+  grep_test 'aſb/' "a${CB}ſ${CE}b/" 'S' --color=always -i -$mode
+  grep_test 'aSb/' ''               'ſ' --color=always -i -$mode
+  grep_test 'aſb/' ''               's' --color=always -i -$mode
+  # uc(U+1FBE GREEK PROSGEGRAMMENI)                  = U+0399 GREEK CAPITAL LETTER IOTA
+  grep_test 'aιb/' "a${CB}ι${CE}b/" 'Ι' --color=always -i -$mode
+  grep_test 'aΙb/' ''               'ι' --color=always -i -$mode
+  grep_test 'aιb/' ''               'ι' --color=always -i -$mode
+  # lc(U+2126 OHM SIGN)                              = U+03C9 GREEK SMALL LETTER OMEGA
+  grep_test 'aΩb/' "a${CB}Ω${CE}b/" 'ω' --color=always -i -$mode
+  grep_test 'aωb/' ''               'Ω' --color=always -i -$mode
+  grep_test 'aΩb/' ''               'Ω' --color=always -i -$mode
+  # lc(U+212A KELVIN SIGN)                           = U+006B LATIN SMALL LETTER K
+  grep_test 'aKb/' "a${CB}K${CE}b/" 'k' --color=always -i -$mode
+  grep_test 'akb/' ''               'K' --color=always -i -$mode
+  grep_test 'aKb/' ''               'K' --color=always -i -$mode
+  # lc(U+212B ANGSTROM SIGN)                         = U+00E5 LATIN SMALL LETTER A WITH RING ABOVE
+  grep_test 'aÅb/' "a${CB}Å${CE}b/" 'å' --color=always -i -$mode
+  grep_test 'aåb/' ''               'Å' --color=always -i -$mode
+  grep_test 'aÅb/' ''               'Å' --color=always -i -$mode
+done
+
+
+# Any tests inserted right here will be performed under an UTF-8 locale.
+# Insert them before LC_ALL is set above to avoid this.
+# Leave this comment last.
+
+Exit $failures
diff --git a/src/grep/tests/get-mb-cur-max.c b/src/grep/tests/get-mb-cur-max.c
new file mode 100644
index 0000000..4b2e40e
--- /dev/null
+++ b/src/grep/tests/get-mb-cur-max.c
@@ -0,0 +1,36 @@
+/* Auxiliary program to detect support for a locale.
+   Copyright 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+#include <config.h>
+#include <locale.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "getprogname.h"
+
+int
+main (int argc, char **argv)
+{
+  if (1 < argc && setlocale (LC_ALL, argv[1]))
+    {
+      printf ("%d\n", (int) MB_CUR_MAX);
+      exit (EXIT_SUCCESS);
+    }
+
+  exit (EXIT_FAILURE);
+}
diff --git a/src/grep/tests/grep-dev-null b/src/grep/tests/grep-dev-null
new file mode 100755
index 0000000..49a9385
--- /dev/null
+++ b/src/grep/tests/grep-dev-null
@@ -0,0 +1,20 @@
+#!/bin/sh
+# Case-insensitive grep with a 0-size input file would fail in grep up to 2.6.3
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+
+LC_ALL=en_US.UTF-8
+export LC_ALL
+
+echo x | returns_ 1 grep -f /dev/null || fail=1
+echo x | returns_ 1 grep -if /dev/null || fail=1
+echo x | returns_ 1 grep -Ff /dev/null || fail=1
+echo x | returns_ 1 grep -Fif /dev/null || fail=1
+
+returns_ 1 grep -f /dev/null < /dev/null || fail=1
+returns_ 1 grep -if /dev/null < /dev/null || fail=1
+returns_ 1 grep -Ff /dev/null < /dev/null || fail=1
+returns_ 1 grep -Fif /dev/null < /dev/null || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/grep-dev-null-out b/src/grep/tests/grep-dev-null-out
new file mode 100755
index 0000000..397a3f1
--- /dev/null
+++ b/src/grep/tests/grep-dev-null-out
@@ -0,0 +1,13 @@
+#!/bin/sh
+# Outputting to /dev/null.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_timeout_
+
+${AWK-awk} 'BEGIN {while (1) print "x"}' </dev/null |
+  returns_ 124 timeout 10 grep x >/dev/null || fail=1
+
+echo abc | grep b >>/dev/null || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/grep-dir b/src/grep/tests/grep-dir
new file mode 100755
index 0000000..4947512
--- /dev/null
+++ b/src/grep/tests/grep-dir
@@ -0,0 +1,31 @@
+#!/bin/sh
+# Case-insensitive grep with a 0-size input file would fail in grep up to 2.6.3
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+mkdir a || framework_failure
+
+# Lower and upper bound of valid exit status for "grep -f DIR",
+# when reading from empty and nonempty files, respectively.
+if cat a >acopy 2>&1 && cmp a acopy; then
+  l=1 u=1 L=0 U=1
+else
+  l=2 u=127 L=2 U=127
+fi
+
+status_range ()
+{
+  status=$?
+  { test $1 -le $status && test $status -le $2; } || fail=1
+}
+
+echo x | grep -f a/; status_range $L $U
+echo x | grep -if a/; status_range $L $U
+echo x | grep -Ff a/; status_range $L $U
+echo x | grep -Fif a/; status_range $L $U
+
+grep -f a/ < /dev/null; status_range $l $u
+grep -if a/ < /dev/null; status_range $l $u
+grep -Ff a/ < /dev/null; status_range $l $u
+grep -Fif a/ < /dev/null; status_range $l $u
+
+Exit $fail
diff --git a/src/grep/tests/hash-collision-perf b/src/grep/tests/hash-collision-perf
new file mode 100755
index 0000000..898b496
--- /dev/null
+++ b/src/grep/tests/hash-collision-perf
@@ -0,0 +1,53 @@
+#!/bin/sh
+# Test for this performance regression:
+# grep-3.5 and 3.6 would take O(N^2) time for some sets of input regexps.
+
+# Copyright 2020-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+: > empty || framework_failure_
+
+# Construct a test case that consumes enough CPU time that we don't
+# have to worry about measurement noise. This first case is searching
+# for digits, which never exhibited a problem with hash collisions.
+n_pat=40000
+while :; do
+  seq $n_pat > in || framework_failure_
+  small_ms=$(LC_ALL=C user_time_ 1 grep --file=in empty) || fail=1
+  test $small_ms -ge 200 && break
+  n_pat=$(expr $n_pat '*' 2)
+done
+
+# Now, search for those same digits mapped to A-J.
+# With the PJW-based hash function, this became O(N^2).
+seq $n_pat | tr 0-9 A-J > in || framework_failure_
+large_ms=$(LC_ALL=C user_time_ 1 grep --file=in empty) || fail=1
+
+# Deliberately recording in an unused variable so it
+# shows up in set -x output, in case this test fails.
+ratio=$(expr "$large_ms" / "$small_ms")
+warn_ ratio=$ratio
+
+# The duration of the latter run must be no more than 10 times
+# that of the former.  Using recent versions prior to this fix,
+# this test would fail due to ratios > 800.  Using the fixed version,
+# it's common to see a ratio less than 1.
+returns_ 1 expr $small_ms '<' $large_ms / 10 || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/help-version b/src/grep/tests/help-version
new file mode 100755
index 0000000..44015ce
--- /dev/null
+++ b/src/grep/tests/help-version
@@ -0,0 +1,276 @@
+#!/bin/sh
+# Make sure all of these programs work properly
+# when invoked with --help or --version.
+
+# Copyright (C) 2000-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+# Terminate any background processes
+cleanup_() { kill $pid 2>/dev/null && wait $pid; }
+
+expected_failure_status_chroot=125
+expected_failure_status_env=125
+expected_failure_status_nice=125
+expected_failure_status_nohup=125
+expected_failure_status_stdbuf=125
+expected_failure_status_timeout=125
+expected_failure_status_printenv=2
+expected_failure_status_tty=3
+expected_failure_status_sort=2
+expected_failure_status_expr=3
+expected_failure_status_lbracket=2
+expected_failure_status_dir=2
+expected_failure_status_ls=2
+expected_failure_status_vdir=2
+
+expected_failure_status_cmp=2
+expected_failure_status_zcmp=2
+expected_failure_status_sdiff=2
+expected_failure_status_diff3=2
+expected_failure_status_diff=2
+expected_failure_status_zdiff=2
+expected_failure_status_zgrep=2
+expected_failure_status_zegrep=2
+expected_failure_status_zfgrep=2
+
+expected_failure_status_grep=2
+expected_failure_status_egrep=2
+expected_failure_status_fgrep=2
+
+test "$built_programs" \
+  || fail_ "built_programs not specified!?!"
+
+test "$VERSION" \
+  || fail_ "set envvar VERSION; it is required for a PATH sanity-check"
+
+# Extract version from --version output of the first program
+for i in $built_programs; do
+  v=$(env $i --version | sed -n '1s/.* //p;q')
+  break
+done
+
+# Ensure that it matches $VERSION.
+test "x$v" = "x$VERSION" \
+  || fail_ "--version-\$VERSION mismatch"
+
+for lang in C fr da; do
+  for i in $built_programs; do
+
+    # Skip 'test'; it doesn't accept --help or --version.
+    test $i = test && continue
+
+    # false fails even when invoked with --help or --version.
+    # true and false are tested with these options separately.
+    test $i = false || test $i = true && continue
+
+    # The just-built install executable is always named 'ginstall'.
+    test $i = install && i=ginstall
+
+    # Make sure they exit successfully, under normal conditions.
+    env $i --help    > h-$i     || fail=1
+    env $i --version >/dev/null || fail=1
+
+    # Make sure they mention the bug-reporting address in --help output.
+    grep "$PACKAGE_BUGREPORT" h-$i > /dev/null || fail=1
+    rm -f h-$i
+
+    # Make sure they fail upon 'disk full' error.
+    if test -w /dev/full && test -c /dev/full; then
+      test $i = [ && prog=lbracket || prog=$(echo $i|sed "s/$EXEEXT$//")
+      eval "expected=\$expected_failure_status_$prog"
+      test x$expected = x && expected=1
+
+      returns_ $expected env $i --help    >/dev/full 2>/dev/null &&
+      returns_ $expected env $i --version >/dev/full 2>/dev/null ||
+      {
+        fail=1
+        env $i --help >/dev/full 2>/dev/null
+        status=$?
+        echo "*** $i: bad exit status '$status' (expected $expected)," 1>&2
+        echo "  with --help or --version output redirected to /dev/full" 1>&2
+      }
+    fi
+  done
+done
+
+bigZ_in=bigZ-in.Z
+zin=zin.gz
+zin2=zin2.gz
+
+tmp=tmp-$$
+tmp_in=in-$$
+tmp_in2=in2-$$
+tmp_dir=dir-$$
+tmp_out=out-$$
+mkdir $tmp || fail=1
+cd $tmp || fail=1
+
+comm_setup () { args="$tmp_in $tmp_in"; }
+csplit_setup () { args="$tmp_in //"; }
+cut_setup () { args='-f 1'; }
+join_setup () { args="$tmp_in $tmp_in"; }
+tr_setup () { args='a a'; }
+
+chmod_setup () { args="a+x $tmp_in"; }
+# Punt on these.
+chgrp_setup () { args=--version; }
+chown_setup () { args=--version; }
+mkfifo_setup () { args=--version; }
+mknod_setup () { args=--version; }
+# Punt on uptime, since it fails (e.g., failing to get boot time)
+# on some systems, and we shouldn't let that stop 'make check'.
+uptime_setup () { args=--version; }
+
+# Create a file in the current directory, not in $TMPDIR.
+mktemp_setup () { args=mktemp.XXXX; }
+
+cmp_setup () { args="$tmp_in $tmp_in2"; }
+
+# Tell dd not to print the line with transfer rate and total.
+# The transfer rate would vary between runs.
+dd_setup () { args=status=noxfer; }
+
+zdiff_setup () { args="$zin $zin2"; }
+zcmp_setup () { args="$zin $zin2"; }
+zcat_setup () { args=$zin; }
+gunzip_setup () { args=$zin; }
+zmore_setup () { args=$zin; }
+zless_setup () { args=$zin; }
+znew_setup () { args=$bigZ_in; }
+zforce_setup () { args=$zin; }
+zgrep_setup () { args="z $zin"; }
+zegrep_setup () { args="z $zin"; }
+zfgrep_setup () { args="z $zin"; }
+gzexe_setup () { args=$tmp_in; }
+
+# We know that $tmp_in contains a "0"
+grep_setup () { args="0 $tmp_in"; }
+egrep_setup () { args="0 $tmp_in"; }
+fgrep_setup () { args="0 $tmp_in"; }
+
+diff_setup () { args="$tmp_in $tmp_in2"; }
+sdiff_setup () { args="$tmp_in $tmp_in2"; }
+diff3_setup () { args="$tmp_in $tmp_in2 $tmp_in2"; }
+cp_setup () { args="$tmp_in $tmp_in2"; }
+ln_setup () { args="$tmp_in ln-target"; }
+ginstall_setup () { args="$tmp_in $tmp_in2"; }
+mv_setup () { args="$tmp_in $tmp_in2"; }
+mkdir_setup () { args=$tmp_dir/subdir; }
+realpath_setup () { args=$tmp_in; }
+rmdir_setup () { args=$tmp_dir; }
+rm_setup () { args=$tmp_in; }
+shred_setup () { args=$tmp_in; }
+touch_setup () { args=$tmp_in2; }
+truncate_setup () { args="--reference=$tmp_in $tmp_in2"; }
+
+mkid_setup () { printf 'f(){}\ntypedef int t;\n' > f.c; args=. ; }
+lid_setup () { args=; }
+fid_setup () { args=f.c; }
+fnid_setup () { args=; }
+xtokid_setup () { args=; }
+aid_setup () { args=f; }
+eid_setup () { args=--version; }
+gid_setup () { args=f; }
+defid_setup () { args=t; }
+
+basename_setup () { args=$tmp_in; }
+dirname_setup () { args=$tmp_in; }
+expr_setup () { args=foo; }
+
+# Punt, in case GNU 'id' hasn't been installed yet.
+groups_setup () { args=--version; }
+
+pathchk_setup () { args=$tmp_in; }
+yes_setup () { args=--version; }
+logname_setup () { args=--version; }
+nohup_setup () { args=--version; }
+printf_setup () { args=foo; }
+seq_setup () { args=10; }
+sleep_setup () { args=0; }
+stdbuf_setup () { args="-oL true"; }
+timeout_setup () { args=--version; }
+
+# I'd rather not run sync, since it spins up disks that I've
+# deliberately caused to spin down (but not unmounted).
+sync_setup () { args=--version; }
+
+test_setup () { args=foo; }
+
+# This is necessary in the unusual event that there is
+# no valid entry in /etc/mtab.
+df_setup () { args=/; }
+
+# This is necessary in the unusual event that getpwuid (getuid ()) fails.
+id_setup () { args=-u; }
+
+# Use env to avoid invoking built-in sleep of Solaris 11's /bin/sh.
+kill_setup () {
+  external=env
+  $external sleep 10m & pid=$!
+  args=$pid
+}
+
+link_setup () { args="$tmp_in link-target"; }
+unlink_setup () { args=$tmp_in; }
+
+readlink_setup () {
+  ln -s . slink
+  args=slink;
+}
+
+stat_setup () { args=$tmp_in; }
+unlink_setup () { args=$tmp_in; }
+lbracket_setup () { args=": ]"; }
+
+parted_setup () { args="-s $tmp_in mklabel gpt"
+  dd if=/dev/null of=$tmp_in seek=2000; }
+
+# Ensure that each program "works" (exits successfully) when doing
+# something more than --help or --version.
+for i in $built_programs; do
+  # Skip these.
+  case $i in chroot|stty|tty|false|chcon|runcon|coreutils) continue;; esac
+
+  rm -rf $tmp_in $tmp_in2 $tmp_dir $tmp_out $bigZ_in $zin $zin2
+  echo z |gzip > $zin
+  cp $zin $zin2
+  cp $zin $bigZ_in
+
+  # This is sort of kludgey: use numbers so this is valid input for factor,
+  # and two tokens so it's valid input for tsort.
+  echo 2147483647 0 > $tmp_in
+  # Make $tmp_in2 identical. Then, using $tmp_in and $tmp_in2 as arguments
+  # to the likes of cmp and diff makes them exit successfully.
+  cp $tmp_in $tmp_in2
+  mkdir $tmp_dir
+  # echo ================== $i
+  test $i = [ && prog=lbracket || prog=$(echo $i|sed "s/$EXEEXT$//")
+  if type ${prog}_setup > /dev/null 2>&1; then
+    ${prog}_setup
+  else
+    args=
+  fi
+  if env $i $args < $tmp_in > $tmp_out; then
+    : # ok
+  else
+    echo FAIL: $i
+    fail=1
+  fi
+  rm -rf $tmp_in $tmp_in2 $tmp_out $tmp_dir
+done
+
+Exit $fail
diff --git a/src/grep/tests/high-bit-range b/src/grep/tests/high-bit-range
new file mode 100755
index 0000000..38dff54
--- /dev/null
+++ b/src/grep/tests/high-bit-range
@@ -0,0 +1,28 @@
+#!/bin/sh
+# Exercise high-bit-set unibyte-in-[...]-range bug.
+
+# Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+printf '\201\n' > in || framework_failure_
+grep -a "$(printf '[\201]')" in > out || fail=1
+
+compare out in || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/in-eq-out-infloop b/src/grep/tests/in-eq-out-infloop
new file mode 100755
index 0000000..11ba904
--- /dev/null
+++ b/src/grep/tests/in-eq-out-infloop
@@ -0,0 +1,41 @@
+#!/bin/sh
+# Demonstrate the disk-filling infloop when redirecting to an input file.
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_timeout_
+
+# Use an input file large enough that the problem is reproducible in spite
+# of buffering effects.  Just larger than 256KB should be adequate.
+v=$(printf %063d 0)'
+'
+# 64 * 2^12 = 256k
+for i in 1 2 3 4 5 6 7 8 9 10 11 12; do
+  v="$v$v"
+done
+
+echo "$v" > out || framework_failure_
+
+for arg in out - ''; do
+  # Accommodate both 'out' and '(standard input)', as well as
+  # the multi-byte quoting we see on OS/X-based systems.
+  echo grep: ...: input file is also the output > err.exp || framework_failure_
+
+  # Require an exit status of 2.
+  # grep-2.8 and earlier would infloop with $arg = out.
+  # grep-2.10 and earlier would infloop with $arg = - or $arg = ''.
+  timeout 10 grep 0 $arg < out >> out 2> err; st=$?; test $st = 2 || fail=1
+  sed 's/grep: .*: /grep: ...: /' err > k && mv k err
+  # Normalize the diagnostic prefix from e.g., "/mnt/dir/grep: " to "grep: "
+  sed 's/^[^:]*: /grep: /' err > k && mv k err
+  compare err.exp err || fail=1
+
+  # But with each of the following options it must not exit-2.
+  for i in -q -m1 -l -L; do
+    timeout 10 grep $i 0 $arg < out >> out 2> err; st=$?
+    test $st = 2 && fail=1
+  done
+
+  timeout 10 grep -2 0 $arg < out >> out 2> err; st=$?
+  test $st = 2 || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/include-exclude b/src/grep/tests/include-exclude
new file mode 100755
index 0000000..c3d22a1
--- /dev/null
+++ b/src/grep/tests/include-exclude
@@ -0,0 +1,76 @@
+#!/bin/sh
+# Use of any --include or --exclude* option would segfault in 2.6 and 2.6.1
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+mkdir -p x/dir || framework_failure_
+echo aaa > x/a || framework_failure_
+echo bbb > x/b || framework_failure_
+echo ddd > x/dir/d || framework_failure_
+
+printf '%s\n' x/b:bbb x/dir/d:ddd > exp-not-a   || framework_failure_
+printf '%s\n'         x/dir/d:ddd > exp-not-ab  || framework_failure_
+printf '%s\n' x/a:aaa x/b:bbb     > exp-not-d   || framework_failure_
+printf '%s\n' x/a:aaa x/b:bbb     > exp-not-dir || framework_failure_
+printf '%s\n' x/a:aaa             > exp-a       || framework_failure_
+printf '%s\n' a:aaa               > exp-aa      || framework_failure_
+printf '%s\n' aaa                 > exp-aaa     || framework_failure_
+printf '%s\n' ./x/a ./x/b ./x/dir/d | sort > exp-dotnames || framework_failure_
+
+grep -r --exclude='a*'    . x > out || fail=1
+sort out > k && mv k out
+compare exp-not-a out || fail=1
+
+grep -r --exclude='Rumpelstiltskin' --include='a*' --exclude='a*' . x > out ||
+  fail=1
+sort out > k && mv k out
+compare exp-not-a out || fail=1
+
+grep -r --exclude='[ab]'  . x > out || fail=1
+sort out > k && mv k out
+compare exp-not-ab out || fail=1
+
+grep -r --exclude='*d'    . x > out || fail=1
+sort out > k && mv k out
+compare exp-not-d out || fail=1
+
+grep -r --exclude-dir=dir . x > out || fail=1
+sort out > k && mv k out
+compare exp-not-dir out || fail=1
+
+grep -r --exclude-dir=dir/ . x > out || fail=1
+sort out > k && mv k out
+compare exp-not-dir out || fail=1
+
+# Test with a non-glob.
+grep -r --include=a    . x > out || fail=1
+# no need to sort
+compare exp-a out || fail=1
+
+# Also test --include with a "glob".
+grep -r --include='a*'    . x > out || fail=1
+# no need to sort
+compare exp-a out || fail=1
+
+# --include (without --recursive) uses different code
+grep --directories=skip --include=x/a --exclude-dir=dir '^aaa$' x/* > out \
+    || fail=1
+compare exp-a out || fail=1
+
+(cd x && grep -r --exclude-dir=. '^aaa$') > out || fail=1
+compare exp-aa out || fail=1
+
+grep --exclude=- '^aaa$' - < x/a > out || fail=1
+compare exp-aaa out || fail=1
+
+for exclude in 'x' 'x*'; do
+    grep -rl --exclude-dir="$exclude" . x > out
+    test $? -eq 1 || fail=1
+    compare /dev/null out || fail=1
+done
+
+for exclude in 'x' 'x*' './x' './x*'; do
+    grep -rl --exclude-dir="$exclude" . ./x | sort > out || fail=1
+    compare /dev/null out || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/inconsistent-range b/src/grep/tests/inconsistent-range
new file mode 100755
index 0000000..e28acde
--- /dev/null
+++ b/src/grep/tests/inconsistent-range
@@ -0,0 +1,17 @@
+#!/bin/sh
+# This would fail for grep-2.6
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+printf '00a\n00g\n00z\n00A\n00G\n00Z\n'      > in || framework_failure_
+
+fail=0
+
+for LOC in en_US.UTF-8 en_US zh_CN $LOCALE_FR_UTF8 C; do
+  out1=out1-$LOC
+  LC_ALL=$LOC grep -E '(.)\1[A-Z]' in > $out1 || fail=1
+  out2=out2-$LOC
+  LC_ALL=$LOC grep -E '[A-Z]' in > $out2 || fail=1
+  compare $out1 $out2 || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/init.cfg b/src/grep/tests/init.cfg
new file mode 100644
index 0000000..72cab20
--- /dev/null
+++ b/src/grep/tests/init.cfg
@@ -0,0 +1,220 @@
+# This file is sourced by init.sh, *before* its initialization.
+
+# This goes hand in hand with the "9>&2;" in tests/Makefile.am's
+# TESTS_ENVIRONMENT definition.
+stderr_fileno_=9
+
+# Map settings of "none" to the empty string.
+test _"$LOCALE_FR" = _none && LOCALE_FR=
+test _"$LOCALE_FR_UTF8" = _none && LOCALE_FR_UTF8=
+
+# Unset key environment variables.
+if (FOO=FOO; unset FOO) >/dev/null 2>&1; then
+  as_unset=unset
+else
+  as_unset=false
+fi
+
+# Derive this list by searching for string literals as the first
+# argument to getenv:
+# git grep getenv|perl -nle '/\bgetenv *\("(.+?)"\)/ and print $1'|sort -u grep
+vars_='
+GREP_COLOR
+GREP_COLORS
+TERM
+'
+envvar_check_fail=0
+for v_ in $vars_
+do
+  $as_unset $v_
+  if eval test \"\${$v_+set}\" = set; then
+    echo "$0: the $v_ environment variable is set --" \
+      ' unset it and rerun this test' >&2
+    envvar_check_fail=1
+  fi
+done
+
+test "$envvar_check_fail" = 1 && fail_ "failed to unset the above envvars"
+
+require_timeout_()
+{
+  ( timeout 10s true ) > /dev/null 2>&1 \
+    || skip_ your system lacks the timeout program
+  returns_ 1 timeout 10s false \
+    || skip_ your system has a non-GNU timeout program
+  returns_ 124 timeout 0.01 sleep 0.02 \
+    || skip_ "'timeout 0.01 sleep 0.02' did not time out"
+}
+
+require_pcre_()
+{
+  echo . | grep -P . 2>err || {
+    test $? -eq 1 && fail_ PCRE available, but does not work.
+    skip_ no PCRE support
+  }
+  compare /dev/null err || fail_ PCRE available, but stderr not empty.
+}
+
+# Some tests would fail without this particular locale.
+# If the locale is not available, just skip the test.
+require_en_utf8_locale_()
+{
+  path_prepend_ .
+  case $(get-mb-cur-max en_US.UTF-8) in
+    [3456]) ;;
+    *) skip_ 'en_US.UTF-8 locale not found' ;;
+  esac
+}
+
+require_tr_utf8_locale_()
+{
+  path_prepend_ .
+  case $(get-mb-cur-max tr_TR.UTF-8) in
+    [3456]) ;;
+    *) skip_ 'tr_TR.UTF-8 locale not found' ;;
+  esac
+}
+
+require_ru_RU_koi8_r()
+{
+  path_prepend_ .
+  case $(get-mb-cur-max ru_RU.KOI8-R) in
+    1) ;;
+    *) skip_ 'ru_RU.KOI8-R locale not found' ;;
+  esac
+}
+
+require_compiled_in_MB_support()
+{
+  require_en_utf8_locale_
+  printf 'é' | LC_ALL=en_US.UTF-8 grep '[[:lower:]]' \
+    || skip_ this test requires MBS support
+}
+
+require_unibyte_locale()
+{
+  path_prepend_ .
+  for loc in C en_US; do
+    for encoding in '' .iso88591 .iso885915 .ISO8859-1 .ISO8859-15; do
+      locale=$loc$encoding
+      MB_CUR_MAX=$(get-mb-cur-max $locale 2>/dev/null) &&
+        test "$MB_CUR_MAX" -eq 1 &&
+        LC_ALL=$locale &&
+        export LC_ALL &&
+        return
+    done
+  done
+  skip_ 'no unibyte locale found'
+}
+
+# Define hi_res_time_ to a function that prints the current time
+# as a floating point number with greater than 1-second resolution.
+# Otherwise, skip the requiring test.
+require_hi_res_time_()
+{
+  local cmd
+  for cmd in 'date +%s.%N' \
+          'perl -le "use Time::HiRes qw(time); print scalar time()"'; do
+      case $($cmd) in
+          *.[0-9]*) eval 'hi_res_time_() { '"$cmd"'; }'; break;;
+      esac
+  done
+  type hi_res_time_ || skip_ no high-resolution timer support
+}
+
+require_JP_EUC_locale_()
+{
+  local locale=ja_JP.eucJP
+  path_prepend_ .
+  case $(get-mb-cur-max $locale) in
+    [23])
+        LC_ALL=$locale &&
+        export LC_ALL &&
+        return
+        ;;
+    *) ;;
+  esac
+
+  skip_ "$locale locale not found"
+}
+
+expensive_()
+{
+  if test "$RUN_EXPENSIVE_TESTS" != yes; then
+    skip_ 'expensive: disabled by default
+This test is relatively expensive, so it is disabled by default.
+To run it anyway, rerun make check with the RUN_EXPENSIVE_TESTS
+environment variable set to yes.  E.g.,
+
+  env RUN_EXPENSIVE_TESTS=yes make check
+
+or use the shortcut target of the toplevel Makefile,
+
+  make check-expensive
+'
+  fi
+}
+
+# Like printf with a single argument, but that argument must be a
+# sequence of four-byte strings \xHH where each H is a hexadecimal byte.
+hex_printf_()
+{
+  local octal_fmt=$(printf '\\%o' \
+    $(printf '%s\n' "$1" \
+      | sed 's,\\x\([0-9abcdefABCDEF][0-9abcdefABCDEF]\), 0x\1,g'))
+  printf "$octal_fmt"
+}
+
+# Wrap tr so that it always runs in the C locale.
+# Otherwise, in a multibyte locale, GNU tr (which is not multibyte-aware
+# as of 2014-11-08), would work differently than others.  For example,
+# this command, which was written with unibyte GNU tr in mind,
+#   LC_ALL=ja_JP.eucJP tr AB '\244\263'
+# would act like this with the multibyte tr from HP-UX and Solaris:
+#   LC_ALL=ja_JP.eucJP tr A  '\244\263'
+tr() { LC_ALL=C env -- tr "$@"; }
+
+# Usage: user_time_ EXPECTED_EXIT_STATUS CMD ...
+# If CMD ... exits with the expected exit status, print the elapsed
+# child "user" time (not "system" time) in milliseconds and return 0.
+# Otherwise, diagnose the exit status mismatch and return nonzero.
+user_time_()
+{
+  $PERL -le '
+    my $expected_exit_status = $ARGV[0];
+    shift @ARGV;
+
+    system (@ARGV);
+    my ($user, $system, $child_user, $child_system) = times;
+
+    my $me = q('"$ME_"');
+    $? == -1
+      and die qq($me: failed to exec ") . join (" ", @ARGV) . qq(": $!\n);
+    my $rc = $?;
+    my $sig = ($rc & 127);
+    $sig and die "$me: child died with signal $sig\n";
+    $rc >>= 8;
+    $rc == $expected_exit_status
+      or die "$me: bad exit status: expected $expected_exit_status; got $rc\n";
+
+    # Print milliseconds of child user time.
+    $child_user *= 1000;
+    print int ($child_user + 0.5)' "$@"
+}
+
+# yes is not portable, fake it with $AWK
+yes() { line=${*-y} ${AWK-awk} 'BEGIN{for (;;) print ENVIRON["line"]}'; }
+
+# Some systems lack seq.
+# A limited replacement for seq: handle 1 or 2 args; increment must be 1
+if ! type seq > /dev/null 2>&1; then
+  seq()
+  {
+    case $# in
+      1) start=1  final=$1;;
+      2) start=$1 final=$2;;
+      *) echo you lose 1>&2; exit 1;;
+    esac
+    awk 'BEGIN{for(i='$start';i<='$final';i++) print i}' < /dev/null
+  }
+fi
diff --git a/src/grep/tests/init.sh b/src/grep/tests/init.sh
new file mode 100644
index 0000000..9ef8348
--- /dev/null
+++ b/src/grep/tests/init.sh
@@ -0,0 +1,683 @@
+# source this file; set up for tests
+
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# Using this file in a test
+# =========================
+#
+# The typical skeleton of a test looks like this:
+#
+#   #!/bin/sh
+#   . "${srcdir=.}/init.sh"; path_prepend_ .
+#   Execute some commands.
+#   Note that these commands are executed in a subdirectory, therefore you
+#   need to prepend "../" to relative filenames in the build directory.
+#   Note that the "path_prepend_ ." is useful only if the body of your
+#   test invokes programs residing in the initial directory.
+#   For example, if the programs you want to test are in src/, and this test
+#   script is named tests/test-1, then you would use "path_prepend_ ../src",
+#   or perhaps export PATH='$(abs_top_builddir)/src$(PATH_SEPARATOR)'"$$PATH"
+#   to all tests via automake's TESTS_ENVIRONMENT.
+#   Set the exit code 0 for success, 77 for skipped, or 1 or other for failure.
+#   Use the skip_ and fail_ functions to print a diagnostic and then exit
+#   with the corresponding exit code.
+#   Exit $?
+
+# Executing a test that uses this file
+# ====================================
+#
+# Running a single test:
+#   $ make check TESTS=test-foo.sh
+#
+# Running a single test, with verbose output:
+#   $ make check TESTS=test-foo.sh VERBOSE=yes
+#
+# Running a single test, keeping the temporary directory:
+#   $ make check TESTS=test-foo.sh KEEP=yes
+#
+# Running a single test, with single-stepping:
+#   1. Go into a sub-shell:
+#   $ bash
+#   2. Set relevant environment variables from TESTS_ENVIRONMENT in the
+#      Makefile:
+#   $ export srcdir=../../tests # this is an example
+#   3. Execute the commands from the test, copy&pasting them one by one:
+#   $ . "$srcdir/init.sh"; path_prepend_ .
+#   ...
+#   4. Finally
+#   $ exit
+
+# =============================================================================
+# Elementary diagnostics
+
+ME_=`expr "./$0" : '.*/\(.*\)$'`
+
+# Prepare PATH_SEPARATOR.
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+  # Determine PATH_SEPARATOR by trying to find /bin/sh in a PATH which
+  # contains only /bin. Note that ksh looks also at the FPATH variable,
+  # so we have to set that as well for the test.
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+    && { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+           || PATH_SEPARATOR=';'
+       }
+fi
+
+# We use a trap below for cleanup.  This requires us to go through
+# hoops to get the right exit status transported through the handler.
+# So use 'Exit STATUS' instead of 'exit STATUS' inside of the tests.
+# Turn off errexit here so that we don't trip the bug with OSF1/Tru64
+# sh inside this function.
+Exit () { set +e; (exit $1); exit $1; }
+
+# Print warnings (e.g., about skipped and failed tests) to this file number.
+# Override by defining to say, 9, in init.cfg, and putting say,
+#   export ...ENVVAR_SETTINGS...; $(SHELL) 9>&2
+# in the definition of TESTS_ENVIRONMENT in your tests/Makefile.am file.
+# This is useful when using automake's parallel tests mode, to print
+# the reason for skip/failure to console, rather than to the .log files.
+: ${stderr_fileno_=2}
+
+# Note that correct expansion of "$*" depends on IFS starting with ' '.
+# Always write the full diagnostic to stderr.
+# When stderr_fileno_ is not 2, also emit the first line of the
+# diagnostic to that file descriptor.
+warn_ ()
+{
+  # If IFS does not start with ' ', set it and emit the warning in a subshell.
+  case $IFS in
+    ' '*) printf '%s\n' "$*" >&2
+          test $stderr_fileno_ = 2 \
+            || { printf '%s\n' "$*" | sed 1q >&$stderr_fileno_ ; } ;;
+    *) (IFS=' '; warn_ "$@");;
+  esac
+}
+fail_ () { warn_ "$ME_: failed test: $@"; Exit 1; }
+skip_ () { warn_ "$ME_: skipped test: $@"; Exit 77; }
+fatal_ () { warn_ "$ME_: hard error: $@"; Exit 99; }
+framework_failure_ () { warn_ "$ME_: set-up failure: $@"; Exit 99; }
+
+# =============================================================================
+# Ensure the shell supports modern syntax.
+
+# Sanitize this shell to POSIX mode, if possible.
+DUALCASE=1; export DUALCASE
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+  emulate sh
+  NULLCMD=:
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else
+  case `(set -o) 2>/dev/null` in
+    *posix*) set -o posix ;;
+  esac
+fi
+
+# We require $(...) support unconditionally.
+# We require that the printf built-in work correctly regarding octal escapes;
+# this eliminates /bin/sh on AIX 7.2.
+# We require non-surprising "local" semantics (this eliminates dash).
+# This takes the admittedly draconian step of eliminating dash, because the
+# assignment tab=$(printf '\t') works fine, yet preceding it with "local "
+# transforms it into an assignment that sets the variable to the empty string.
+# That is too counter-intuitive, and can lead to subtle run-time malfunction.
+# The example below is less subtle in that with dash, it evokes the run-time
+# exception "dash: 1: local: 1: bad variable name".
+# We require a few additional shell features only when $EXEEXT is nonempty,
+# in order to support automatic $EXEEXT emulation:
+# - hyphen-containing alias names
+# - we prefer to use ${var#...} substitution, rather than having
+#   to work around lack of support for that feature.
+# The following code attempts to find a shell with support for these features.
+# If the current shell passes the test, we're done.  Otherwise, test other
+# shells until we find one that passes.  If one is found, re-exec it.
+# If no acceptable shell is found, skip the current test.
+#
+# The "...set -x; P=1 true 2>err..." test is to disqualify any shell that
+# emits "P=1" into err, as /bin/sh from SunOS 5.11 and OpenBSD 4.7 do.
+#
+# Use "9" to indicate success (rather than 0), in case some shell acts
+# like Solaris 10's /bin/sh but exits successfully instead of with status 2.
+
+# Eval this code in a subshell to determine a shell's suitability.
+# 10 - passes all tests; ok to use
+#  9 - ok, but enabling "set -x" corrupts app stderr; prefer higher score
+#  ? - not ok
+gl_shell_test_script_='
+test $(echo y) = y || exit 1
+LC_ALL=en_US.UTF-8 printf "\\351" 2>/dev/null \
+  | LC_ALL=C tr "\\351" x | LC_ALL=C grep "^x$" > /dev/null \
+  || exit 1
+printf "\\351" 2>/dev/null \
+  | LC_ALL=C tr "\\351" x | LC_ALL=C grep "^x$" > /dev/null \
+  || exit 1
+f_local_() { local v=1; }; f_local_ || exit 1
+f_dash_local_fail_() { local t=$(printf " 1"); }; f_dash_local_fail_
+score_=10
+if test "$VERBOSE" = yes; then
+  test -n "$( (exec 3>&1; set -x; P=1 true 2>&3) 2> /dev/null)" && score_=9
+fi
+test -z "$EXEEXT" && exit $score_
+shopt -s expand_aliases
+alias a-b="echo zoo"
+v=abx
+     test ${v%x} = ab \
+  && test ${v#a} = bx \
+  && test $(a-b) = zoo \
+  && exit $score_
+'
+
+if test "x$1" = "x--no-reexec"; then
+  shift
+else
+  # Assume a working shell.  Export to subshells (setup_ needs this).
+  gl_set_x_corrupts_stderr_=false
+  export gl_set_x_corrupts_stderr_
+
+  # Record the first marginally acceptable shell.
+  marginal_=
+
+  # Search for a shell that meets our requirements.
+  for re_shell_ in __current__ "${CONFIG_SHELL:-no_shell}" \
+      /bin/sh bash dash zsh pdksh fail
+  do
+    test "$re_shell_" = no_shell && continue
+
+    # If we've made it all the way to the sentinel, "fail" without
+    # finding even a marginal shell, skip this test.
+    if test "$re_shell_" = fail; then
+      test -z "$marginal_" && skip_ failed to find an adequate shell
+      re_shell_=$marginal_
+      break
+    fi
+
+    # When testing the current shell, simply "eval" the test code.
+    # Otherwise, run it via $re_shell_ -c ...
+    if test "$re_shell_" = __current__; then
+      # 'eval'ing this code makes Solaris 10's /bin/sh exit with
+      # $? set to 2.  It does not evaluate any of the code after the
+      # "unexpected" first '('.  Thus, we must run it in a subshell.
+      ( eval "$gl_shell_test_script_" ) > /dev/null 2>&1
+    else
+      "$re_shell_" -c "$gl_shell_test_script_" 2>/dev/null
+    fi
+
+    st_=$?
+
+    # $re_shell_ works just fine.  Use it.
+    if test $st_ = 10; then
+      gl_set_x_corrupts_stderr_=false
+      break
+    fi
+
+    # If this is our first marginally acceptable shell, remember it.
+    if test "$st_:$marginal_" = 9: ; then
+      marginal_="$re_shell_"
+      gl_set_x_corrupts_stderr_=true
+    fi
+  done
+
+  if test "$re_shell_" != __current__; then
+    # Found a usable shell.  Preserve -v and -x.
+    case $- in
+      *v*x* | *x*v*) opts_=-vx ;;
+      *v*) opts_=-v ;;
+      *x*) opts_=-x ;;
+      *) opts_= ;;
+    esac
+    re_shell=$re_shell_
+    export re_shell
+    exec "$re_shell_" $opts_ "$0" --no-reexec "$@"
+    echo "$ME_: exec failed" 1>&2
+    exit 127
+  fi
+fi
+
+# =============================================================================
+# Ensure the shell behaves reasonably.
+
+# If this is bash, turn off all aliases.
+test -n "$BASH_VERSION" && unalias -a
+
+# Note that when supporting $EXEEXT (transparently mapping from PROG_NAME to
+# PROG_NAME.exe), we want to support hyphen-containing names like test-acos.
+# That is part of the shell-selection test above.  Why use aliases rather
+# than functions?  Because support for hyphen-containing aliases is more
+# widespread than that for hyphen-containing function names.
+test -n "$EXEEXT" && test -n "$BASH_VERSION" && shopt -s expand_aliases
+
+# =============================================================================
+# Creating a temporary directory (needed by the core test framework)
+
+# Create a temporary directory, much like mktemp -d does.
+# Written by Jim Meyering.
+#
+# Usage: mktempd_ /tmp phoey.XXXXXXXXXX
+#
+# First, try to use the mktemp program.
+# Failing that, we'll roll our own mktemp-like function:
+#  - try to get random bytes from /dev/urandom
+#  - failing that, generate output from a combination of quickly-varying
+#      sources and gzip.  Ignore non-varying gzip header, and extract
+#      "random" bits from there.
+#  - given those bits, map to file-name bytes using tr, and try to create
+#      the desired directory.
+#  - make only $MAX_TRIES_ attempts
+
+# Helper function.  Print $N pseudo-random bytes from a-zA-Z0-9.
+rand_bytes_ ()
+{
+  n_=$1
+
+  # Maybe try openssl rand -base64 $n_prime_|tr '+/=\012' abcd first?
+  # But if they have openssl, they probably have mktemp, too.
+
+  chars_=abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789
+  dev_rand_=/dev/urandom
+  if test -r "$dev_rand_"; then
+    # Note: 256-length($chars_) == 194; 3 copies of $chars_ is 186 + 8 = 194.
+    dd ibs=$n_ count=1 if=$dev_rand_ 2>/dev/null \
+      | LC_ALL=C tr -c $chars_ 01234567$chars_$chars_$chars_
+    return
+  fi
+
+  n_plus_50_=`expr $n_ + 50`
+  cmds_='date; date +%N; free; who -a; w; ps auxww; ps -ef'
+  data_=` (eval "$cmds_") 2>&1 | gzip `
+
+  # Ensure that $data_ has length at least 50+$n_
+  while :; do
+    len_=`echo "$data_"|wc -c`
+    test $n_plus_50_ -le $len_ && break;
+    data_=` (echo "$data_"; eval "$cmds_") 2>&1 | gzip `
+  done
+
+  echo "$data_" \
+    | dd bs=1 skip=50 count=$n_ 2>/dev/null \
+    | LC_ALL=C tr -c $chars_ 01234567$chars_$chars_$chars_
+}
+
+mktempd_ ()
+{
+  case $# in
+  2);;
+  *) fail_ "Usage: mktempd_ DIR TEMPLATE";;
+  esac
+
+  destdir_=$1
+  template_=$2
+
+  MAX_TRIES_=4
+
+  # Disallow any trailing slash on specified destdir:
+  # it would subvert the post-mktemp "case"-based destdir test.
+  case $destdir_ in
+  / | //) destdir_slash_=$destdir;;
+  */) fail_ "invalid destination dir: remove trailing slash(es)";;
+  *) destdir_slash_=$destdir_/;;
+  esac
+
+  case $template_ in
+  *XXXX) ;;
+  *) fail_ \
+       "invalid template: $template_ (must have a suffix of at least 4 X's)";;
+  esac
+
+  # First, try to use mktemp.
+  d=`unset TMPDIR; { mktemp -d -t -p "$destdir_" "$template_"; } 2>/dev/null` &&
+
+  # The resulting name must be in the specified directory.
+  case $d in "$destdir_slash_"*) :;; *) false;; esac &&
+
+  # It must have created the directory.
+  test -d "$d" &&
+
+  # It must have 0700 permissions.  Handle sticky "S" bits.
+  perms=`ls -dgo "$d" 2>/dev/null` &&
+  case $perms in drwx--[-S]---*) :;; *) false;; esac && {
+    echo "$d"
+    return
+  }
+
+  # If we reach this point, we'll have to create a directory manually.
+
+  # Get a copy of the template without its suffix of X's.
+  base_template_=`echo "$template_"|sed 's/XX*$//'`
+
+  # Calculate how many X's we've just removed.
+  template_length_=`echo "$template_" | wc -c`
+  nx_=`echo "$base_template_" | wc -c`
+  nx_=`expr $template_length_ - $nx_`
+
+  err_=
+  i_=1
+  while :; do
+    X_=`rand_bytes_ $nx_`
+    candidate_dir_="$destdir_slash_$base_template_$X_"
+    err_=`mkdir -m 0700 "$candidate_dir_" 2>&1` \
+      && { echo "$candidate_dir_"; return; }
+    test $MAX_TRIES_ -le $i_ && break;
+    i_=`expr $i_ + 1`
+  done
+  fail_ "$err_"
+}
+
+# =============================================================================
+# Core test framework
+
+# An arbitrary prefix to help distinguish test directories.
+testdir_prefix_ () { printf gt; }
+
+# Set up the environment for the test to run in.
+setup_ ()
+{
+  if test "$VERBOSE" = yes; then
+    # Test whether set -x may cause the selected shell to corrupt an
+    # application's stderr.  Many do, including zsh-4.3.10 and the /bin/sh
+    # from SunOS 5.11, OpenBSD 4.7 and Irix 6.5.
+    # If enabling verbose output this way would cause trouble, simply
+    # issue a warning and refrain.
+    if $gl_set_x_corrupts_stderr_; then
+      warn_ "using SHELL=$SHELL with 'set -x' corrupts stderr"
+    else
+      set -x
+    fi
+  fi
+
+  initial_cwd_=$PWD
+
+  # Create and enter the temporary directory.
+  pfx_=`testdir_prefix_`
+  test_dir_=`mktempd_ "$initial_cwd_" "$pfx_-$ME_.XXXX"` \
+    || fail_ "failed to create temporary directory in $initial_cwd_"
+  cd "$test_dir_" || fail_ "failed to cd to temporary directory"
+  # Set variables srcdir, builddir, for the convenience of the test.
+  case $srcdir in
+    /* | ?:*) ;;
+    *) srcdir="../$srcdir" ;;
+  esac
+  builddir=".."
+  export srcdir builddir
+
+  # As autoconf-generated configure scripts do, ensure that IFS
+  # is defined initially, so that saving and restoring $IFS works.
+  gl_init_sh_nl_='
+'
+  IFS=" ""	$gl_init_sh_nl_"
+
+  # This trap statement, along with a trap on 0 below, ensure that the
+  # temporary directory, $test_dir_, is removed upon exit as well as
+  # upon receipt of any of the listed signals.
+  for sig_ in 1 2 3 13 15; do
+    eval "trap 'Exit $(expr $sig_ + 128)' $sig_"
+  done
+}
+
+# This is a stub function that is run upon trap (upon regular exit and
+# interrupt).  Override it with a per-test function, e.g., to unmount
+# a partition, or to undo any other global state changes.
+cleanup_ () { :; }
+
+# Run the user-overridable cleanup_ function, remove the temporary
+# directory and exit with the incoming value of $?.
+remove_tmp_ ()
+{
+  __st=$?
+  cleanup_
+  if test "$KEEP" = yes; then
+    echo "Not removing temporary directory $test_dir_"
+  else
+    # cd out of the directory we're about to remove
+    cd "$initial_cwd_" || cd / || cd /tmp
+    chmod -R u+rwx "$test_dir_"
+    # If removal fails and exit status was to be 0, then change it to 1.
+    rm -rf "$test_dir_" || { test $__st = 0 && __st=1; }
+  fi
+  exit $__st
+}
+
+# =============================================================================
+# Prepending directories to PATH
+
+# Given a directory name, DIR, if every entry in it that matches *.exe
+# contains only the specified bytes (see the case stmt below), then print
+# a space-separated list of those names and return 0.  Otherwise, don't
+# print anything and return 1.  Naming constraints apply also to DIR.
+find_exe_basenames_ ()
+{
+  feb_dir_=$1
+  feb_fail_=0
+  feb_result_=
+  feb_sp_=
+  for feb_file_ in $feb_dir_/*.exe; do
+    # If there was no *.exe file, or there existed a file named "*.exe" that
+    # was deleted between the above glob expansion and the existence test
+    # below, just skip it.
+    test "x$feb_file_" = "x$feb_dir_/*.exe" && test ! -f "$feb_file_" \
+      && continue
+    # Exempt [.exe, since we can't create a function by that name, yet
+    # we can't invoke [ by PATH search anyways due to shell builtins.
+    test "x$feb_file_" = "x$feb_dir_/[.exe" && continue
+    case $feb_file_ in
+      *[!-a-zA-Z/0-9_.+]*) feb_fail_=1; break;;
+      *) # Remove leading file name components as well as the .exe suffix.
+         feb_file_=${feb_file_##*/}
+         feb_file_=${feb_file_%.exe}
+         feb_result_="$feb_result_$feb_sp_$feb_file_";;
+    esac
+    feb_sp_=' '
+  done
+  test $feb_fail_ = 0 && printf %s "$feb_result_"
+  return $feb_fail_
+}
+
+# Consider the files in directory, $1.
+# For each file name of the form PROG.exe, create an alias named
+# PROG that simply invokes PROG.exe, then return 0.  If any selected
+# file name or the directory name, $1, contains an unexpected character,
+# define no alias and return 1.
+create_exe_shims_ ()
+{
+  case $EXEEXT in
+    '') return 0 ;;
+    .exe) ;;
+    *) echo "$0: unexpected \$EXEEXT value: $EXEEXT" 1>&2; return 1 ;;
+  esac
+
+  base_names_=`find_exe_basenames_ $1` \
+    || { echo "$0 (exe_shim): skipping directory: $1" 1>&2; return 0; }
+
+  if test -n "$base_names_"; then
+    for base_ in $base_names_; do
+      alias "$base_"="$base_$EXEEXT"
+    done
+  fi
+
+  return 0
+}
+
+# Use this function to prepend to PATH an absolute name for each
+# specified, possibly-$initial_cwd_-relative, directory.
+path_prepend_ ()
+{
+  while test $# != 0; do
+    path_dir_=$1
+    case $path_dir_ in
+      '') fail_ "invalid path dir: '$1'";;
+      /* | ?:*) abs_path_dir_=$path_dir_;;
+      *) abs_path_dir_=$initial_cwd_/$path_dir_;;
+    esac
+    case $abs_path_dir_ in
+      *$PATH_SEPARATOR*) fail_ "invalid path dir: '$abs_path_dir_'";;
+    esac
+    PATH="$abs_path_dir_$PATH_SEPARATOR$PATH"
+
+    # Create an alias, FOO, for each FOO.exe in this directory.
+    create_exe_shims_ "$abs_path_dir_" \
+      || fail_ "something failed (above): $abs_path_dir_"
+    shift
+  done
+  export PATH
+}
+
+# =============================================================================
+# Convenience environment variables for the tests
+
+# -----------------------------------------------------------------------------
+
+# Enable glibc's malloc-perturbing option.
+# This is useful for exposing code that depends on the fact that
+# malloc-related functions often return memory that is mostly zeroed.
+# If you have the time and cycles, use valgrind to do an even better job.
+: ${MALLOC_PERTURB_=87}
+export MALLOC_PERTURB_
+
+# -----------------------------------------------------------------------------
+
+# The interpreter for Bourne-shell scripts.
+# No special standards compatibility requirements.
+# Some environments, such as Android, don't have /bin/sh.
+if test -f /bin/sh$EXEEXT; then
+  BOURNE_SHELL=/bin/sh
+else
+  BOURNE_SHELL=sh
+fi
+
+# =============================================================================
+# Convenience functions for the tests
+
+# -----------------------------------------------------------------------------
+# Return value checking
+
+# This is used to simplify checking of the return value
+# which is useful when ensuring a command fails as desired.
+# I.e., just doing `command ... &&fail=1` will not catch
+# a segfault in command for example.  With this helper you
+# instead check an explicit exit code like
+#   returns_ 1 command ... || fail
+returns_ () {
+  # Disable tracing so it doesn't interfere with stderr of the wrapped command
+  { set +x; } 2>/dev/null
+
+  local exp_exit="$1"
+  shift
+  "$@"
+  test $? -eq $exp_exit && ret_=0 || ret_=1
+
+  if test "$VERBOSE" = yes && test "$gl_set_x_corrupts_stderr_" = false; then
+    set -x
+  fi
+  { return $ret_; } 2>/dev/null
+}
+
+# -----------------------------------------------------------------------------
+# Text file comparison
+
+# Emit a header similar to that from diff -u;  Print the simulated "diff"
+# command so that the order of arguments is clear.  Don't bother with @@ lines.
+emit_diff_u_header_ ()
+{
+  printf '%s\n' "diff -u $*" \
+    "--- $1	1970-01-01" \
+    "+++ $2	1970-01-01"
+}
+
+# Arrange not to let diff or cmp operate on /dev/null,
+# since on some systems (at least OSF/1 5.1), that doesn't work.
+# When there are not two arguments, or no argument is /dev/null, return 2.
+# When one argument is /dev/null and the other is not empty,
+# cat the nonempty file to stderr and return 1.
+# Otherwise, return 0.
+compare_dev_null_ ()
+{
+  test $# = 2 || return 2
+
+  if test "x$1" = x/dev/null; then
+    test -s "$2" || return 0
+    emit_diff_u_header_ "$@"; sed 's/^/+/' "$2"
+    return 1
+  fi
+
+  if test "x$2" = x/dev/null; then
+    test -s "$1" || return 0
+    emit_diff_u_header_ "$@"; sed 's/^/-/' "$1"
+    return 1
+  fi
+
+  return 2
+}
+
+for diff_opt_ in -u -U3 -c '' no; do
+  test "$diff_opt_" != no &&
+    diff_out_=`exec 2>/dev/null; diff $diff_opt_ "$0" "$0" < /dev/null` &&
+    break
+done
+if test "$diff_opt_" != no; then
+  if test -z "$diff_out_"; then
+    compare_ () { diff $diff_opt_ "$@"; }
+  else
+    compare_ ()
+    {
+      # If no differences were found, AIX and HP-UX 'diff' produce output
+      # like "No differences encountered".  Hide this output.
+      diff $diff_opt_ "$@" > diff.out
+      diff_status_=$?
+      test $diff_status_ -eq 0 || cat diff.out || diff_status_=2
+      rm -f diff.out || diff_status_=2
+      return $diff_status_
+    }
+  fi
+elif cmp -s /dev/null /dev/null 2>/dev/null; then
+  compare_ () { cmp -s "$@"; }
+else
+  compare_ () { cmp "$@"; }
+fi
+
+# Usage: compare EXPECTED ACTUAL
+#
+# Given compare_dev_null_'s preprocessing, defer to compare_ if 2 or more.
+# Otherwise, propagate $? to caller: any diffs have already been printed.
+compare ()
+{
+  # This looks like it can be factored to use a simple "case $?"
+  # after unchecked compare_dev_null_ invocation, but that would
+  # fail in a "set -e" environment.
+  if compare_dev_null_ "$@"; then
+    return 0
+  else
+    case $? in
+      1) return 1;;
+      *) compare_ "$@";;
+    esac
+  fi
+}
+
+# -----------------------------------------------------------------------------
+
+# If you want to override the testdir_prefix_ function,
+# or to add more utility functions, use this file.
+test -f "$srcdir/init.cfg" \
+  && . "$srcdir/init.cfg"
+
+# =============================================================================
+# Set up the environment for the test to run in.
+
+setup_ "$@"
+# This trap is here, rather than in the setup_ function, because some
+# shells run the exit trap at shell function exit, rather than script exit.
+trap remove_tmp_ 0
diff --git a/src/grep/tests/initial-tab b/src/grep/tests/initial-tab
new file mode 100755
index 0000000..c19a7ce
--- /dev/null
+++ b/src/grep/tests/initial-tab
@@ -0,0 +1,37 @@
+#!/bin/sh
+# Exercise -T.
+
+# Copyright 2016-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+printf 'x\n\n' > in || framework_failure_
+
+grep -T '^' in > out || fail=1
+compare in out || fail=1
+
+printf 'in:\tx\nin:\n' > exp || framework_failure_
+grep -T '^' in /dev/null > out || fail=1
+compare exp out || fail=1
+
+printf '%s\n' a b c d e f g h i j > in1 || framework_failure_
+printf 'in1: 1:\ta\n' > exp1 || framework_failure_
+grep -Tn 'a' in1 /dev/null > out1 || fail=1
+compare exp1 out1 || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/invalid-multibyte-infloop b/src/grep/tests/invalid-multibyte-infloop
new file mode 100755
index 0000000..b4ad14b
--- /dev/null
+++ b/src/grep/tests/invalid-multibyte-infloop
@@ -0,0 +1,37 @@
+#!/bin/sh
+# Ensure that we don't trigger a grep -F infloop.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+require_compiled_in_MB_support
+require_timeout_
+
+encode() { echo "$1" | tr A '\202'; }
+
+encode AA > input
+
+fail=0
+
+# Before 2.15, this would infloop.
+LC_ALL=en_US.UTF-8 timeout 10 grep -aF $(encode A) input > out
+status=$?
+if test $status -eq 0; then
+  compare input out
+elif test $status -eq 1; then
+  compare_dev_null_ /dev/null out
+else
+  test $status -eq 2
+fi || fail=1
+
+LC_ALL=en_US.UTF-8 timeout 10 grep -F $(encode A) input > out
+status=$?
+if test $status -eq 0; then
+  compare /dev/null out
+elif test $status -eq 1; then
+  compare_dev_null_ /dev/null out
+else
+  test $status -eq 2
+fi || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/khadafy b/src/grep/tests/khadafy
new file mode 100755
index 0000000..1c68d5b
--- /dev/null
+++ b/src/grep/tests/khadafy
@@ -0,0 +1,26 @@
+#! /bin/sh
+# Regression test for GNU grep.
+#
+# Copyright (C) 2001, 2006, 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+# The Khadafy test is brought to you by Scott Anderson . . .
+
+grep -E -f $abs_top_srcdir/tests/khadafy.regexp \
+    $abs_top_srcdir/tests/khadafy.lines > khadafy.out || fail=1
+if cmp $abs_top_srcdir/tests/khadafy.lines khadafy.out
+then
+        :
+else
+        echo Khadafy test failed -- output left on khadafy.out
+        fail=1
+fi
+
+Exit $fail
diff --git a/src/grep/tests/khadafy.lines b/src/grep/tests/khadafy.lines
new file mode 100644
index 0000000..57e21a1
--- /dev/null
+++ b/src/grep/tests/khadafy.lines
@@ -0,0 +1,32 @@
+1)  Muammar Qaddafi
+2)  Mo'ammar Gadhafi
+3)  Muammar Kaddafi
+4)  Muammar Qadhafi
+5)  Moammar El Kadhafi
+6)  Muammar Gadafi
+7)  Mu'ammar al-Qadafi
+8)  Moamer El Kazzafi
+9)  Moamar al-Gaddafi
+10) Mu'ammar Al Qathafi
+11) Muammar Al Qathafi
+12) Mo'ammar el-Gadhafi
+13) Moamar El Kadhafi
+14) Muammar al-Qadhafi
+15) Mu'ammar al-Qadhdhafi
+16) Mu'ammar Qadafi
+17) Moamar Gaddafi
+18) Mu'ammar Qadhdhafi
+19) Muammar Khaddafi
+20) Muammar al-Khaddafi
+21) Mu'amar al-Kadafi
+22) Muammar Ghaddafy
+23) Muammar Ghadafi
+24) Muammar Ghaddafi
+25) Muamar Kaddafi
+26) Muammar Quathafi
+27) Muammar Gheddafi
+28) Muamar Al-Kaddafi
+29) Moammar Khadafy
+30) Moammar Qudhafi
+31) Mu'ammar al-Qaddafi
+32) Mulazim Awwal Mu'ammar Muhammad Abu Minyar al-Qadhafi
diff --git a/src/grep/tests/khadafy.regexp b/src/grep/tests/khadafy.regexp
new file mode 100644
index 0000000..46fe8dd
--- /dev/null
+++ b/src/grep/tests/khadafy.regexp
@@ -0,0 +1 @@
+M[ou]'?am+[ae]r .*([AEae]l[- ])?[GKQ]h?[aeu]+([dtz][dhz]?)+af[iy]
diff --git a/src/grep/tests/kwset-abuse b/src/grep/tests/kwset-abuse
new file mode 100755
index 0000000..bb8911f
--- /dev/null
+++ b/src/grep/tests/kwset-abuse
@@ -0,0 +1,31 @@
+#! /bin/sh
+# Evoke a segfault in a hard-to-reach code path of kwset.c.
+# This bug affected grep versions 2.19 through 2.21.
+#
+# Copyright (C) 2015-2021 Free Software Foundation, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+# This test case chooses a haystack of size 260,000, since prodding
+# with gdb showed a reallocation slightly larger than that in fillbuf.
+# To reach the buggy code, the needle must have length < 1/11 that of
+# the haystack, and 10,000 is a nice round number that fits the bill.
+printf '%0260000dXy\n' 0 | returns_ 1 grep -F $(printf %010000dy 0) \
+  || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/long-line-vs-2GiB-read b/src/grep/tests/long-line-vs-2GiB-read
new file mode 100755
index 0000000..29d29ec
--- /dev/null
+++ b/src/grep/tests/long-line-vs-2GiB-read
@@ -0,0 +1,25 @@
+#!/bin/sh
+# Ensure that grep can handle lines 2GiB long.
+# Before grep-2.16, a line of length 2^31 or greater would provoke
+# an "Invalid argument" (EINVAL) failure from the read syscall on
+# systems like OS/X 10.8.5.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+# Searching 2GiB takes a while.
+expensive_
+
+echo big > exp || framework_failure_
+
+MiB=1048576
+dd bs=$MiB seek=2048 of=big < /dev/null || framework_failure_
+echo x >> big || framework_failure_
+grep -l x big > out 2> err || fail=1
+
+# Not everyone has 2GB of memory free.
+grep '^grep: memory exhausted$' err && skip_ 'memory exhausted'
+
+compare exp out || fail=1
+compare /dev/null err || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/long-pattern-perf b/src/grep/tests/long-pattern-perf
new file mode 100755
index 0000000..8151c1a
--- /dev/null
+++ b/src/grep/tests/long-pattern-perf
@@ -0,0 +1,42 @@
+#!/bin/sh
+# grep-2.21 would incur a 100x penalty for 10x increase in regexp length
+
+# Copyright 2015-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+# This test is susceptible to failure due to differences in
+# system load during the two test runs, so we'll mark it as
+# "expensive", making it less likely to be run by regular users.
+expensive_
+
+echo x > in || framework_failure_
+# Note that we want 10x the byte count (not line count) in the larger file.
+seq 10000 50000 | tr -d '\012' > r || framework_failure_
+cat r r r r r r r r r r > re-10x || framework_failure_
+mv r re || framework_failure_
+
+base_ms=$(user_time_ 1 grep -f re in    ) || fail=1
+b10x_ms=$(user_time_ 1 grep -f re-10x in) || fail=1
+
+# Increasing the length of the regular expression by a factor
+# of 10 should cause no more than a 10x increase in duration.
+# However, we'll draw the line at 20x to avoid false-positives.
+returns_ 1 expr $base_ms '<' $b10x_ms / 20 || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/many-regex-performance b/src/grep/tests/many-regex-performance
new file mode 100755
index 0000000..4b4dfe8
--- /dev/null
+++ b/src/grep/tests/many-regex-performance
@@ -0,0 +1,79 @@
+#!/bin/sh
+# Test for this performance regression:
+# grep-3.4 would require O(N^2) RSS for N regexps
+# grep-3.5 requires O(N) in the most common cases.
+
+# Copyright 2020-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+# This test is susceptible to failure due to differences in
+# system load during the two test runs, so we'll mark it as
+# "expensive", making it less likely to be run by regular users.
+expensive_
+
+# Make the quick/small input large enough so that even on high-end
+# systems this first invocation takes at least 10ms of user time.
+word_list=/usr/share/dict/linux.words
+
+# If $word_list does not exist, generate an input that exibhits
+# similar performance characteristics.
+if ! test -f $word_list; then
+  # Generate data comprable to that word list.
+  # Note how all "words" start with "a", and that there is
+  # a small percentage of lines with at least one "." metachar.
+  # This requires /dev/urandom, so if it's not present, skip
+  # this test. If desperate, we could fall back to using
+  # tar+compressed lib/*.c as the data source.
+  test -r /dev/urandom \
+    || skip_ 'this system has neither word list nor working /dev/urandom'
+  word_list=word_list
+  ( echo a; cat /dev/urandom		\
+    | LC_ALL=C tr -dc 'a-zA-Z0-9_'	\
+    | head -c500000			\
+    | sed 's/\(........\)/\1\n/g'	\
+    | sed s/rs/./			\
+    | sed s/./a/			\
+    | sort				\
+  ) > $word_list
+fi
+
+n_lines=2000
+while :; do
+  sed ${n_lines}q < $word_list > in || framework_failure_
+  small_ms=$(LC_ALL=C user_time_ 1 grep --file=in -v in) || fail=1
+  test $small_ms -ge 10 && break
+  n_lines=$(expr $n_lines + 2000)
+done
+
+# Now, run it again, but with 20 times as many lines.
+n_lines=$(expr $n_lines \* 20)
+sed ${n_lines}q < $word_list > in || framework_failure_
+large_ms=$(LC_ALL=C user_time_ 1 grep --file=in -v in) || fail=1
+
+# Deliberately recording in an unused variable so it
+# shows up in set -x output, in case this test fails.
+ratio=$(expr "$large_ms" / "$small_ms")
+
+# The duration of the larger run must be no more than 60 times
+# that of the small one.  Using recent versions prior to this fix,
+# this test would fail due to ratios larger than 300.  Using the
+# fixed version, it's common to see a ratio of 20-30.
+returns_ 1 expr $small_ms '<' $large_ms / 60 || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/match-lines b/src/grep/tests/match-lines
new file mode 100755
index 0000000..597f061
--- /dev/null
+++ b/src/grep/tests/match-lines
@@ -0,0 +1,36 @@
+#!/bin/sh
+# Trigger a bug in the DFA matcher that would make
+# grep -F -x -o PAT print an extra newline for each match.
+# This would fail for grep-2.19 and grep-2.20.
+
+# Copyright 2014-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+printf 'a\n' > in || framework_failure_
+
+fail=0
+
+for locale in C en_US.UTF-8; do
+  for options in -x '-E -x' '-F -x'; do
+    for o in '' -o; do
+      LC_ALL=$locale grep $o $options a in > out || fail=1
+      compare out in || fail=1
+    done
+  done
+done
+
+Exit $fail
diff --git a/src/grep/tests/max-count-overread b/src/grep/tests/max-count-overread
new file mode 100755
index 0000000..23c45cb
--- /dev/null
+++ b/src/grep/tests/max-count-overread
@@ -0,0 +1,15 @@
+#!/bin/sh
+# Ensure that -m1 stops reading after the first match.
+# In grep-2.19, yes x|grep -m1 x would infloop.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_timeout_
+
+fail=0
+
+echo x > exp || framework_failure_
+
+yes x | timeout 10 grep -m1 x > out || fail=1
+compare exp out || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/max-count-vs-context b/src/grep/tests/max-count-vs-context
new file mode 100755
index 0000000..e80c3ce
--- /dev/null
+++ b/src/grep/tests/max-count-vs-context
@@ -0,0 +1,23 @@
+#!/bin/sh
+# Show how -m1 works with -A N when a 2nd match is < N lines after the first
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+cat <<EOF > in || framework_failure_
+needle
+1st line of context
+2nd line of context
+3rd line of context
+another needle
+5th line of context relative to first match
+6th line...
+EOF
+
+sed 6q in > exp || framework_failure_
+
+fail=0
+grep -m1 -A5 needle in > out 2>err || fail=1
+
+compare exp out || fail=1
+compare /dev/null err || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/mb-dot-newline b/src/grep/tests/mb-dot-newline
new file mode 100755
index 0000000..8cc4ddf
--- /dev/null
+++ b/src/grep/tests/mb-dot-newline
@@ -0,0 +1,33 @@
+#!/bin/sh
+# Trigger a bug in the DFA matcher.
+# This would fail for grep-2.20.
+
+# Copyright 2014-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+printf 'a\naa\n' > in || framework_failure_
+printf 'aa\n' > exp || framework_failure_
+
+fail=0
+
+for LOC in en_US.UTF-8 en_US zh_CN $LOCALE_FR_UTF8 C; do
+  out1=out1-$LOC
+  LC_ALL=$LOC grep '..' in > out || fail=1
+  compare exp out || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/mb-non-UTF8-overrun b/src/grep/tests/mb-non-UTF8-overrun
new file mode 100755
index 0000000..11668a3
--- /dev/null
+++ b/src/grep/tests/mb-non-UTF8-overrun
@@ -0,0 +1,29 @@
+#!/bin/sh
+# grep would sometimes read beyond end of input, when using a non-UTF8
+# multibyte locale.
+
+# Copyright 2014-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_JP_EUC_locale_
+
+fail=0
+
+# This would fail when running an ASAN-enabled binary, or when run via
+# valgrind, accessing one byte beyond the end of an input buffer.
+returns_ 1 grep -z . < /dev/null || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/mb-non-UTF8-perf-Fw b/src/grep/tests/mb-non-UTF8-perf-Fw
new file mode 100755
index 0000000..c84f28e
--- /dev/null
+++ b/src/grep/tests/mb-non-UTF8-perf-Fw
@@ -0,0 +1,39 @@
+#!/bin/sh
+# Test for a performance regression with -Fw and a non-UTF8 multibyte locale.
+
+# Copyright 2019-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+require_timeout_
+require_JP_EUC_locale_
+
+yes 00 | head -10000000 > in || framework_failure_
+
+# Since we're using an absolute timeout below and want to avoid any initial
+# disk read performance penalty, run first with a large timeout and no error
+# test to prime any cache. Prompted by a report of test failure on a netbsd8.1
+# VM whereby the first run would take 2.5 MINUTES, yet the second would complete
+# in just half a second.
+timeout 500 grep -Fw 0 in
+
+# Before fixing the regression, this would have taken minutes.
+# With the fix, it typically completes in well under one second.
+returns_ 1 timeout 30 grep -Fw 0 in || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/mb-non-UTF8-performance b/src/grep/tests/mb-non-UTF8-performance
new file mode 100755
index 0000000..a0e9b70
--- /dev/null
+++ b/src/grep/tests/mb-non-UTF8-performance
@@ -0,0 +1,48 @@
+#!/bin/sh
+# grep-2.17 would take nearly 200x longer to run the command below.
+# The 200x is on an Intel i7-based system.
+# On an AMD FX-4100, it would take up to 2500x longer.
+
+# Copyright 2014-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+# This test is susceptible to failure due to differences in
+# system load during the two test runs, so we'll mark it as
+# "expensive", making it less likely to be run by regular users.
+expensive_
+
+# Make the input large enough so that even on high-end systems
+# the unibyte test takes at least 10ms of user time.
+n_lines=100000
+while :; do
+  yes $(printf '%078d' 0) | sed ${n_lines}q > in || framework_failure_
+  ubyte_ms=$(LC_ALL=C user_time_ 1 grep -i foobar in) || fail=1
+  test $ubyte_ms -ge 10 && break
+  n_lines=$(expr $n_lines + 200000)
+done
+
+require_JP_EUC_locale_
+mbyte_ms=$(user_time_ 1 grep -i foobar in) || fail=1
+
+# The duration of the multi-byte run must be no more than 30 times
+# that of the single-byte one.
+# A multiple of 3 seems to be enough for i5,i7, but AMD needs >25.
+returns_ 1 expr $ubyte_ms '<' $mbyte_ms / 30 || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/mb-non-UTF8-word-boundary b/src/grep/tests/mb-non-UTF8-word-boundary
new file mode 100755
index 0000000..8c4c755
--- /dev/null
+++ b/src/grep/tests/mb-non-UTF8-word-boundary
@@ -0,0 +1,29 @@
+#!/bin/sh
+# grep -Fw could false-match when using a non-UTF8 multibyte locale.
+
+# Copyright 2019-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_JP_EUC_locale_
+
+fail=0
+
+echo ab > in || framework_failure_
+
+# This would mistakenly print its input line from grep-2.28..3.3
+returns_ 1 grep -Fw b in || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/multibyte-white-space b/src/grep/tests/multibyte-white-space
new file mode 100755
index 0000000..39b90c6
--- /dev/null
+++ b/src/grep/tests/multibyte-white-space
@@ -0,0 +1,99 @@
+#! /bin/sh
+# Test whether \s matches SP and UTF-8 multi-byte white space characters.
+#
+# Copyright (C) 2013-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+
+LC_ALL=en_US.UTF-8
+export LC_ALL
+
+# It would have been nice to be able to use all UTF8 characters
+# with the Unicode WSpace=Y character property,
+# https://en.wikipedia.org/wiki/Whitespace_character, but that
+# would currently cause distracting failures everywhere I've tried.
+# Instead, I've listed each with an indicator column, telling what
+# this test should do if the system's locale/tools produce the
+# wrong answer.
+
+# The values in that column:
+# X required on all systems (fail if \s or \S fail to work as expected)
+# x required on "modern enough" systems
+# O optional: \s or \S misbehavior elicits a warning, but never failure
+
+utf8_space_characters=$(sed 's/.*: *//;s/  */\\x/g' <<\EOF
+U+0009 Horizontal Tab:            X 09
+U+000A Line feed:                 O 0a
+U+000B Vertical Tab:              X 0b
+U+000C Form feed:                 X 0c
+U+000D Carriage return:           X 0d
+U+0020 SPACE:                     X 20
+U+0085 Next line:                 O 85
+U+00A0 NO-BREAK SPACE:            O c2 a0
+U+1680 OGHAM SPACE MARK:          x e1 9a 80
+U+2000 EN QUAD:                   x e2 80 80
+U+2001 EM QUAD:                   x e2 80 81
+U+2002 EN SPACE:                  x e2 80 82
+U+2003 EM SPACE:                  x e2 80 83
+U+2004 THREE-PER-EM SPACE:        x e2 80 84
+U+2005 FOUR-PER-EM SPACE:         x e2 80 85
+U+2006 SIX-PER-EM SPACE:          x e2 80 86
+U+2007 FIGURE SPACE:              O e2 80 87
+U+2008 PUNCTUATION SPACE:         x e2 80 88
+U+2009 THIN SPACE:                x e2 80 89
+U+200A HAIR SPACE:                x e2 80 8a
+U+200B ZERO WIDTH SPACE:          O e2 80 8b
+U+202F NARROW NO-BREAK SPACE:     O e2 80 af
+U+205F MEDIUM MATHEMATICAL SPACE: x e2 81 9f
+U+3000 IDEOGRAPHIC SPACE:         x e3 80 80
+EOF
+)
+
+fail=0
+
+# On systems that are not "modern enough," simply warn when an "x"-marked
+# character is not classified as white space.  Too many systems
+# have inadequate UTF-8 tables in this respect, and that lack should not
+# discourage/confuse those who consider whether to install grep.
+
+# As for what constitutes "modern enough", I've arbitrarily started
+# with "Fedora 20 or newer".  Tested additions welcome.
+modern_enough=0
+grep -iE 'fedora release [2-9][0-9]+\b' /etc/redhat-release >/dev/null 2>&1 \
+  && modern_enough=1
+
+for i in $utf8_space_characters; do
+  eval 'fail() { fail=1; }'
+  m=ERROR
+  case $i in
+      X*) ;;
+      x*) test $modern_enough = 1 || { eval 'fail() { :; }'; m=warning; } ;;
+      O*) m=warning; eval 'fail() { :; }' ;;
+      *) warn_ "unexpected prefix: $i"; exit 1 ;;
+  esac
+
+  # Strip the prefix byte.
+  i=${i#?}
+
+  hex_printf_ "$i" | grep -q '^\s$' \
+      || { warn_ " $m: \\s failed to match $i in the $LC_ALL locale"; fail; }
+  hex_printf_ "$i" | returns_ 1 grep -q '\S' \
+      || { warn_ " $m: \\S mistakenly matched $i in the $LC_ALL locale"; fail; }
+done
+
+
+# This is a separate test, only nominally related to \s.
+# It is solely to get coverage of a code path (exercising dfa.c's
+# match_mb_charset function) that would have otherwise been untouched.
+# However, as of the change-set adding this new test, match_mb_charset
+# is unreachable via grep.
+printf '\0' | returns_ 1 grep -aE '^\s?$' > out 2>&1 || fail=1
+compare /dev/null out
+
+Exit $fail
diff --git a/src/grep/tests/multiple-begin-or-end-line b/src/grep/tests/multiple-begin-or-end-line
new file mode 100755
index 0000000..9f09c62
--- /dev/null
+++ b/src/grep/tests/multiple-begin-or-end-line
@@ -0,0 +1,28 @@
+#!/bin/sh
+# Test a pattern of multiple begin or end line constraints.
+# This would mistakenly print a line when using grep-2.19.
+
+# Copyright 2014-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+echo aa | grep 'a\(b$\|c$\)' >out && fail=1
+compare /dev/null out || fail=1
+
+echo aa | grep '\(^b\|^c\)a' >out && fail=1
+compare /dev/null out || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/no-perl b/src/grep/tests/no-perl
new file mode 100644
index 0000000..956a826
--- /dev/null
+++ b/src/grep/tests/no-perl
@@ -0,0 +1,6 @@
+#! /bin/sh
+# Perl is not available, the test should be considered skipped.
+# FD 9 should have been opened by the test suite harness, pointing
+# to the original stderr (usually, the user's terminal).
+echo "test skipped: no usable version of Perl found" >&9
+exit 77
diff --git a/src/grep/tests/null-byte b/src/grep/tests/null-byte
new file mode 100755
index 0000000..9402c2b
--- /dev/null
+++ b/src/grep/tests/null-byte
@@ -0,0 +1,68 @@
+#!/bin/sh
+# Test NUL bytes in patterns and data.
+
+# Copyright 2014-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+# Add "." to PATH for the use of get-mb-cur-max.
+path_prepend_ .
+
+locales=C
+for locale in en_US.iso885915 en_US.UTF-8; do
+  get-mb-cur-max en_US.UTF-8 >/dev/null 2>&1 && locales="$locales $locale"
+done
+
+fail=0
+
+for left in '' a '#' '\0'; do
+  for right in '' b '#' '\0'; do
+    data="$left\\0$right"
+    printf "$data\\n" >in || framework_failure_
+    for hat in '' '^'; do
+      for dollar in '' '$'; do
+        for force_regex in '' '\\(\\)\\1'; do
+          pat="$hat$force_regex$data$dollar"
+          printf "$pat\\n" >pat || framework_failure_
+          for locale in $locales; do
+            LC_ALL=$locale grep -f pat in
+            status=$?
+            test $status -eq 0 || test $status -eq 1 ||
+              fail_ "'$pat' caused an error"
+            LC_ALL=$locale grep -a -f pat in | cmp -s - in ||
+              fail_ "-a '$pat' does not match '$data'"
+          done
+        done
+      done
+    done
+  done
+done
+
+(echo xxx && yes yyy | sed 100000q && printf 'z\n\0') >in || framework_failure_
+echo xxx >exp || framework_failure_
+grep xxx in >out || fail=1
+compare exp out || fail=1
+
+printf 'xxx\n' > exp || framework_failure_
+grep -E 'xxx|z' in >out || fail=1
+compare exp out || fail=1
+
+printf '%s\0' 'abcadc' >in || framework_failure_
+printf '%s\0' 'abc' 'adc' >exp || framework_failure_
+grep -oz 'a[^c]*c' in >out || fail=1
+compare exp out || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/options b/src/grep/tests/options
new file mode 100755
index 0000000..84ff327
--- /dev/null
+++ b/src/grep/tests/options
@@ -0,0 +1,49 @@
+#! /bin/sh
+# Test for POSIX options for grep
+#
+# Copyright (C) 2001, 2006, 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+#
+# grep [ -E| -F][ -c| -l| -q ][-insvx] -e pattern_list
+#      [-f pattern_file] ... [file. ..]
+# grep [ -E| -F][ -c| -l| -q ][-insvx][-e pattern_list]
+#      -f pattern_file ... [file ...]
+# grep [ -E| -F][ -c| -l| -q ][-insvx] pattern_list [file...]
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+# checking for -E extended regex
+echo "abababccccccd" | grep -E -e 'c{3}' > /dev/null 2>&1
+if test $? -ne 0 ; then
+        echo "Options: Wrong status code, test #1 failed"
+        fail=1
+fi
+
+# checking for basic regex
+echo "abababccccccd" | grep -G -e 'c\{3\}' > /dev/null 2>&1
+if test $? -ne 0 ; then
+        echo "Options: Wrong status code, test #2 failed"
+        fail=1
+fi
+
+# checking for fixed string
+echo "abababccccccd" | grep -F -e 'c\{3\}' > /dev/null 2>&1
+if test $? -ne 1 ; then
+        echo "Options: Wrong status code, test #3 failed"
+        fail=1
+fi
+
+# checking for multiple -e options; see:
+# https://bugs.gnu.org/21670
+echo abchelloabc | grep -e '^hello' -e 'hello$' > /dev/null 2>&1
+if test $? -ne 1 ; then
+        echo "Options: Wrong status code, test #4 failed"
+        fail=1
+fi
+
+Exit $fail
diff --git a/src/grep/tests/pcre b/src/grep/tests/pcre
new file mode 100755
index 0000000..449156d
--- /dev/null
+++ b/src/grep/tests/pcre
@@ -0,0 +1,22 @@
+#! /bin/sh
+# Simple PCRE tests.
+#
+# Copyright (C) 2001, 2006, 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_pcre_
+
+fail=0
+
+echo | grep -P '\s*$' || fail=1
+echo | grep -zP '\s$' || fail=1
+echo '.ab' | returns_ 1 grep -Pwx ab || fail=1
+echo x | grep -Pz '[^a]' || fail=1
+printf 'x\n\0' | returns_ 1 grep -zP 'x$' || fail=1
+printf 'a\nb\0' | grep -zxP a && fail=1
+
+Exit $fail
diff --git a/src/grep/tests/pcre-abort b/src/grep/tests/pcre-abort
new file mode 100755
index 0000000..51cee25
--- /dev/null
+++ b/src/grep/tests/pcre-abort
@@ -0,0 +1,20 @@
+#! /bin/sh
+# Show that grep handles PCRE's PCRE_ERROR_MATCHLIMIT.
+# In grep-2.8, it would abort.
+#
+# Copyright (C) 2011-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_pcre_
+
+fail=0
+
+echo aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab > in || framework_failure_
+returns_ 2 grep -P '((a+)*)+$' in > out || fail=1
+compare /dev/null out || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/pcre-context b/src/grep/tests/pcre-context
new file mode 100755
index 0000000..b910a20
--- /dev/null
+++ b/src/grep/tests/pcre-context
@@ -0,0 +1,36 @@
+#!/bin/sh
+# Test Perl regex with context
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_pcre_
+
+cat >in <<'EOF'
+Preceded by 0 empty lines.
+
+Preceded by 1 empty line.
+
+
+Preceded by 2 empty lines.
+
+
+
+Preceded by 3 empty lines.
+
+
+
+
+Preceded by 4 empty lines.
+
+EOF
+test $? -eq 0 || framework_failure_
+
+printf '%s\0' \
+       'Preceded by 2 empty lines.' \
+       'Preceded by 3 empty lines.' \
+       'Preceded by 4 empty lines.' >exp || framework_failure_
+
+fail=0
+
+grep -Pzo '(?<=\n\n\n).*' in >out || fail_ 'grep -Pzo failed'
+compare exp out || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/pcre-count b/src/grep/tests/pcre-count
new file mode 100755
index 0000000..9eda54b
--- /dev/null
+++ b/src/grep/tests/pcre-count
@@ -0,0 +1,28 @@
+#! /bin/sh
+# grep -P / grep -Pc are inconsistent results
+# This bug affected grep versions 2.21 through 2.22.
+#
+# Copyright (C) 2015-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_pcre_
+
+fail=0
+
+printf 'a\n%032768d\nb\0\n%032768d\na\n' 0 0 > in || framework_failure_
+
+# grep will discover that the input is a binary file sooner if the
+# page size is larger, so allow for either possible output.
+printf 'a\n' >exp1a || framework_failure_
+LC_ALL=C grep -P 'a' in >out || fail=1
+compare exp1a out || compare /dev/null out || fail=1
+
+printf '2\n' >exp2 || framework_failure_
+LC_ALL=C grep -Pc 'a' in >out || fail=1
+compare exp2 out || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/pcre-infloop b/src/grep/tests/pcre-infloop
new file mode 100755
index 0000000..a4c7cac
--- /dev/null
+++ b/src/grep/tests/pcre-infloop
@@ -0,0 +1,33 @@
+#!/bin/sh
+# With some versions of libpcre, apparently including 8.35,
+# the following would trigger an infinite loop in its match function.
+
+# Copyright 2014-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_timeout_
+require_en_utf8_locale_
+require_compiled_in_MB_support
+LC_ALL=en_US.UTF-8 require_pcre_
+
+printf 'a\201b\r' > in || framework_failure_
+
+fail=0
+
+returns_ 1 env LC_ALL=en_US.UTF-8 timeout 10 grep -P 'a.?..b' in \
+  || fail_ "libpcre's match function appears to infloop"
+
+Exit $fail
diff --git a/src/grep/tests/pcre-invalid-utf8-infloop b/src/grep/tests/pcre-invalid-utf8-infloop
new file mode 100755
index 0000000..45b5ee1
--- /dev/null
+++ b/src/grep/tests/pcre-invalid-utf8-infloop
@@ -0,0 +1,26 @@
+#! /bin/sh
+# Ensure that grep -oaP doesn't infloop for invalid multi-byte input
+#
+# Copyright (C) 2015-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_timeout_
+require_en_utf8_locale_
+require_compiled_in_MB_support
+LC_ALL=en_US.UTF-8 require_pcre_
+
+fail=0
+
+printf '\201_\0' > in || framework_failure_
+printf '_\n' > exp || framework_failure_
+
+LC_ALL=en_US.UTF-8 timeout 10 grep -aoP _ in > out 2> err || fail=1
+
+compare exp out || fail=1
+compare /dev/null err || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/pcre-invalid-utf8-input b/src/grep/tests/pcre-invalid-utf8-input
new file mode 100755
index 0000000..d1a2920
--- /dev/null
+++ b/src/grep/tests/pcre-invalid-utf8-input
@@ -0,0 +1,31 @@
+#! /bin/sh
+# Ensure that grep -P doesn't abort or infloop for invalid multi-byte input
+#
+# Copyright (C) 2013-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_timeout_
+require_en_utf8_locale_
+require_compiled_in_MB_support
+LC_ALL=en_US.UTF-8 require_pcre_
+
+fail=0
+
+printf 'j\202j\nj\nk\202\n' > in || framework_failure_
+
+LC_ALL=en_US.UTF-8 timeout 10 grep -P j in
+test $? -eq 0 || fail=1
+
+LC_ALL=en_US.UTF-8 timeout 10 grep -P 'k$' in
+test $? -eq 1 || fail=1
+
+echo k >exp
+
+LC_ALL=en_US.UTF-8 timeout 10 grep -aoP 'k*' in >out || fail=1
+compare exp out || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/pcre-jitstack b/src/grep/tests/pcre-jitstack
new file mode 100755
index 0000000..2a2b1b9
--- /dev/null
+++ b/src/grep/tests/pcre-jitstack
@@ -0,0 +1,63 @@
+#! /bin/sh
+# Grep 2.21 would report "grep: internal PCRE error: -27"
+#
+# Copyright 2015-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_pcre_
+
+for p in 'base64 -d' 'base64 -D' 'openssl base64 -d' \
+      "perl -MMIME::Base64 -0777ne 'print decode_base64(\$_)'" FAIL; do
+    test "$p" = FAIL && skip_ "your system lacks a base64 decoder"
+    x=$(echo eA==| ( eval "$p" ) 2>/dev/null) && test "X$x" = Xx &&
+      {
+        eval "b64_decode() { $p; }"
+        break
+      }
+done
+
+foo=$( (echo foo | gzip | gzip -d) 2>/dev/null) && test "X$foo" = Xfoo \
+  || skip_ "your system lacks the gzip program"
+
+fail=0
+
+b64_decode >pcrejit.txt.gz <<'EOF' || framework_failure_
+H4sIAAAAAAACA+2bUU4DMQxE/7mMz5T7XwKE+IBKVLue58yk0B9EtX6xJxN7t4VaH69a6+tHrW+/
+r4e3n75KARWShSOFTtiumE3FPVyo79ATIJ0Ry0No/yXe99UIUqTGKKUzYHFJHJoaCONQDCnDSCDS
+IPAvGCVeXNsZ7lpbWFfdaZtgPos5LeK2C1TBKzD09V3HFlCOsbFT/hNbz4HzJaRjnjdam9FXw/o6
+VyPozhMmiaRYAMeNSJR1iMjBEFLMtsH7lptartfxkzPQgFVofwRlxKsMYn2KNDnU9fsOQCkRIYVT
+G80ZRqBpSQjRYPX7s9gvtqknyNE2f8V09sxHM7YPmMMJgrmVna2AT717n5fUAIDkiBCqFgWUUgKD
+8jOc0Rgj5JS6vZnQI14wkaTDAkD266p/iVHs8gjCrMFARVM0iEVgFAa9YRAQT4tkgsmloTJLmyCm
+uSHRnTkzIdZMmZ5kYX/iJFtTwu9cFvr3aDWcUx4pUW/cVQwPoQSlwguNd4M0vTpAauKodmLFXv1P
+dkcKkYUglER2Q4L4gnmOiNGzSBATwGQgwihs5/QffIhyfg4hJvM2r4Rp6L+1ibCCd4jYZ6jCiBlc
+2+y4fl4yTGIwcWXNAUEeXmu8iCMV96DNTnmRNICDk2N5qaXGbsF91OX/0hlcYTjrMfy02p9Xv70D
+mv3RZCFOAAA=
+EOF
+
+gzip -d pcrejit.txt || framework_failure_
+
+LC_ALL=C grep -P -n '^([/](?!/)|[^/])*~/.*' pcrejit.txt
+if test $? != 1; then
+    # The above often makes grep attempt to use an inordinate amount
+    # of stack space.  If grep fails with $? != 1, try again, but this
+    # time with no soft limit:
+
+    # Use ulimit to remove that limit, if possible.
+    # If ulimit is not usable, just skip this test.
+    (ulimit -s unlimited) || skip_ this shell lacks ulimit support
+
+    # Rerun that same test, but now with no limit on stack size:
+    (ulimit -s unlimited;
+     returns_ 1 env LC_ALL=C grep -P -n '^([/](?!/)|[^/])*~/.*' pcrejit.txt 2> err) \
+       || fail=1
+
+    # If that failed due to stack overflow, don't cry foul.
+    overflow_pat="stack overflow|exceeded PCRE's recursion limit"
+    test $fail = 1 && { grep -Eq "$overflow_pat" err && fail=0 || cat err; }
+fi
+
+Exit $fail
diff --git a/src/grep/tests/pcre-o b/src/grep/tests/pcre-o
new file mode 100755
index 0000000..1d155a7
--- /dev/null
+++ b/src/grep/tests/pcre-o
@@ -0,0 +1,17 @@
+#! /bin/sh
+# Ensure that grep -oP doesn't cause internal error at match.
+#
+# Copyright (C) 2014-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_pcre_
+
+fail=0
+
+echo ab | grep -oP 'a' || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/pcre-utf8 b/src/grep/tests/pcre-utf8
new file mode 100755
index 0000000..c5d0b80
--- /dev/null
+++ b/src/grep/tests/pcre-utf8
@@ -0,0 +1,40 @@
+#! /bin/sh
+# Ensure that, with -P, Unicode \p{} symbols are correctly matched.
+#
+# Copyright (C) 2012-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_en_utf8_locale_
+LC_ALL=en_US.UTF-8 require_pcre_
+
+fail=0
+
+echo '$' | LC_ALL=en_US.UTF-8 grep -qP '\p{S}' \
+  || skip_ 'PCRE support is compiled out, or it does not support properties'
+
+euro='\342\202\254 euro'
+printf "$euro\\n" > in || framework_failure_
+
+# The euro sign has the unicode "Symbol" property, so this must match:
+LC_ALL=en_US.UTF-8 grep -P '^\p{S}' in > out || fail=1
+compare in out || fail=1
+
+# This RE must *not* match in the C locale, because the first
+# byte is not a "Symbol".
+LC_ALL=C grep -P '^\p{S}' in > out && fail=1
+compare /dev/null out || fail=1
+
+LC_ALL=en_US.UTF-8 grep -P '^. euro$' in > out2 || fail=1
+compare in out2 || fail=1
+
+LC_ALL=en_US.UTF-8 grep -oP '. euro' in > out3 || fail=1
+compare in out3 || fail=1
+
+LC_ALL=en_US.UTF-8 grep -P '^\P{S}' in > out4
+compare /dev/null out4 || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/pcre-w b/src/grep/tests/pcre-w
new file mode 100755
index 0000000..7173b58
--- /dev/null
+++ b/src/grep/tests/pcre-w
@@ -0,0 +1,31 @@
+#! /bin/sh
+# Before grep-2.19, grep -Pw %% would match %% enclosed in word boundaries
+#
+# Copyright (C) 2014-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_pcre_
+
+fail=0
+
+echo %aa% > in || framework_failure_
+grep -Pw aa in > out || fail=1
+compare out in || fail=1
+
+echo a%%a > in || framework_failure_
+grep -Pw %% in > out && fail=1
+compare /dev/null out || fail=1
+
+echo %%%% > in || framework_failure_
+grep -Pw %% in > out || fail=1
+compare out in || fail=1
+
+echo %% > in || framework_failure_
+grep -Pw %% in > out || fail=1
+compare out in || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/pcre-wx-backref b/src/grep/tests/pcre-wx-backref
new file mode 100755
index 0000000..350091a
--- /dev/null
+++ b/src/grep/tests/pcre-wx-backref
@@ -0,0 +1,28 @@
+#! /bin/sh
+# Before grep-2.19, grep -P and -w/-x would not work with a back-reference.
+#
+# Copyright (C) 2014-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_pcre_
+
+echo aa > in || framework_failure_
+echo 'grep: reference to non-existent subpattern' > exp-err \
+  || framework_failure_
+
+fail=0
+
+for xw in x w; do
+  grep -P$xw '(.)\1' in > out 2>&1 || fail=1
+  compare out in || fail=1
+
+  grep -P$xw '(.)\2' in > out 2> err && fail=1
+  compare /dev/null out || fail=1
+  compare exp-err err || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/pcre-z b/src/grep/tests/pcre-z
new file mode 100755
index 0000000..4ce9a93
--- /dev/null
+++ b/src/grep/tests/pcre-z
@@ -0,0 +1,28 @@
+#!/bin/sh
+# Test Perl regex with NUL-separated input
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_pcre_
+require_en_utf8_locale_
+
+REGEX=a
+
+printf '%s\n\0' abc def ghi aaa gah > in || framework_failure_
+
+grep -z "$REGEX" in > exp 2>err || fail_ 'Cannot do BRE (grep -z) match.'
+compare /dev/null err || fail_ 'stderr not empty on grep -z.'
+
+# Sanity check the output
+test "$(grep -cz $REGEX in 2>err)" = 3 \
+    || fail_ 'Incorrect BRE (grep -cz) match.'
+compare /dev/null err || fail_ 'stderr not empty on grep -cz.'
+
+fail=0
+grep -Pz "$REGEX" in > out 2>err || fail=1
+compare exp out || fail=1
+compare /dev/null err || fail=1
+
+printf '\303\200\0' >in0 # "À" followed by a NUL.
+LC_ALL=en_US.UTF-8 grep -z . in0 >out || fail=1
+cmp in0 out || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/posix-bracket b/src/grep/tests/posix-bracket
new file mode 100755
index 0000000..5b8a0fc
--- /dev/null
+++ b/src/grep/tests/posix-bracket
@@ -0,0 +1,34 @@
+#!/bin/sh
+# Check various bracket expressions in the POSIX locale.
+
+# Copyright 2014-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+LC_ALL=C
+export LC_ALL
+
+fail=0
+
+echo a >in || framework_failure_
+for bracketed in '[.a.]' '[.a.]-a' 'a-[.a.]' '[.a.]-[.a.]' \
+    '[=a=]' '[:alpha:]' 'a-a[.-.]--'; do
+  grep "[$bracketed]" in >out || fail=1
+  compare in out || fail=1
+  grep "[^$bracketed]" in >out
+  test $? -eq 1 || fail=1
+  compare /dev/null out || fail=1
+done
+Exit $fail
diff --git a/src/grep/tests/prefix-of-multibyte b/src/grep/tests/prefix-of-multibyte
new file mode 100755
index 0000000..2228a22
--- /dev/null
+++ b/src/grep/tests/prefix-of-multibyte
@@ -0,0 +1,44 @@
+#!/bin/sh
+# This would mistakenly print a line prior to grep-2.18.
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+require_compiled_in_MB_support
+
+encode() { echo "$1" | tr ABC '\357\274\241'; }
+
+encode ABC >exp1
+encode aABC >exp2
+encode ABCABC >exp3
+encode _____________________ABCABC___ >exp4
+
+fail=0
+
+for LOC in en_US.UTF-8 $LOCALE_FR_UTF8; do
+  for pat in A aA BCA; do
+    for file in exp1 exp2 exp3 exp4; do
+      for type in regex dfa fgrep; do
+        case $type in
+          dfa) opt= prefix= ;;
+          fgrep) opt=-F prefix= ;;
+          regex) opt= prefix='\(\)\1' ;;
+        esac
+        pattern=$prefix$(encode $pat)
+        out=out-$type-$LOC
+        LC_ALL=$LOC grep $opt "$pattern" $file >$out
+        status=$?
+        echo $status >$out.status
+        if test $status -eq 0; then
+          compare $file $out
+        elif test $status -eq 1; then
+          compare_dev_null_ /dev/null $out
+        else
+          test $status -eq 2
+        fi || fail=1
+        compare out-regex-$LOC.status $out.status || fail=1
+      done
+    done
+  done
+done
+
+Exit $fail
diff --git a/src/grep/tests/proc b/src/grep/tests/proc
new file mode 100755
index 0000000..43b62d8
--- /dev/null
+++ b/src/grep/tests/proc
@@ -0,0 +1,18 @@
+#! /bin/sh
+# Test the /proc file system if available.
+
+# Copyright 2016-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+test -r /proc/self/status || skip_ 'No /proc/self/status on this platform.'
+
+grep '^' </proc/self/status >/dev/null || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/r-dot b/src/grep/tests/r-dot
new file mode 100755
index 0000000..29aedad
--- /dev/null
+++ b/src/grep/tests/r-dot
@@ -0,0 +1,20 @@
+#!/bin/sh
+# Check that "grep -r PAT" reads ".".
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+mkdir dir || framework_failure_
+echo aaa > dir/a || framework_failure_
+echo bbb > dir/b || framework_failure_
+
+echo a:aaa > exp || framework_failure_
+
+(cd dir && grep -r aaa) > out || fail=1
+compare exp out || fail=1
+
+(cd dir && grep -r aaa < a) > out || fail=1
+compare exp out || fail=1
+
+(cd dir && grep -r aaa *) > out || fail=1
+compare exp out || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/repetition-overflow b/src/grep/tests/repetition-overflow
new file mode 100755
index 0000000..38a652d
--- /dev/null
+++ b/src/grep/tests/repetition-overflow
@@ -0,0 +1,19 @@
+#!/bin/sh
+# These would fail (i.e., match erroneously) prior to grep-2.11.
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+xp1=4294967297 # 2^32+1
+xp2=4294967298 # 2^32+2
+
+fail=0
+
+# Before grep-2.11, when DFA-matching, a repetition count exceeding the
+# range of "unsigned int" would silently wrap around.   Hence, 2^32+1
+# would be treated just like "1", and both of these would mistakenly match.
+
+echo abc  | returns_ 2 grep -E "b{$xp1}"   > out 2> /dev/null || fail=1
+compare /dev/null out || fail=1
+echo abbc | returns_ 2 grep -E "b{1,$xp2}" > out 2> /dev/null || fail=1
+compare /dev/null out || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/reversed-range-endpoints b/src/grep/tests/reversed-range-endpoints
new file mode 100755
index 0000000..4c2193c
--- /dev/null
+++ b/src/grep/tests/reversed-range-endpoints
@@ -0,0 +1,18 @@
+#!/bin/sh
+# Ensure that an invalid range like [b-a] evokes exit status of 2.
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+printf 'grep: Invalid range end\n' > exp
+for prog in grep 'grep -E'; do
+  # exit status must be 2, not 1
+  returns_ 2 $prog '[b-a]' < /dev/null > out 2>&1 || fail=1
+
+  # Normalize the diagnostic prefix from e.g., "/mnt/dir/grep: " to "grep: "
+  sed 's/^[^:]*: /grep: /' out > k && mv k out
+
+  compare exp out || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/sjis-mb b/src/grep/tests/sjis-mb
new file mode 100755
index 0000000..abe2c0c
--- /dev/null
+++ b/src/grep/tests/sjis-mb
@@ -0,0 +1,62 @@
+#!/bin/sh
+# similar to euc-mb and fgrep-infloop, but tests SJIS encoding.
+# in this encoding, an ASCII character is both a valid single-byte
+# character, and a suffix of a valid double-byte character
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+# Add "." to PATH for the use of get-mb-cur-max.
+path_prepend_ .
+
+require_compiled_in_MB_support
+require_timeout_
+
+# Sequences used in this test ("%" and "@" become 8-bit characters, while "A"
+# is the real ASCII character for "A"):
+# - "%" becomes an half-width katakana in SJIS, but it is an invalid sequence
+#   in UTF-8.
+# - "@@" and "@A" are both valid sequences in SJIS.  We try to fool grep into
+#   matching "A" against "@A", or mistaking a valid "A" match for the second
+#   byte of a multi-byte character.
+
+encode() { echo "$1" | tr @% '\203\301'; }
+
+for locale in ja_JP.SHIFT_JIS ja_JP.SJIS ja_JP.PCK ''; do
+  test "$(get-mb-cur-max $locale)" = 2 && break
+done
+test -n "$locale" || skip_ 'SJIS locale not found'
+
+k=0
+test_grep_reject() {
+  k=$(expr $k + 1)
+  encode "$2" > in || return 1
+  returns_ 1 env LC_ALL=$locale timeout 10s \
+    grep $1 $(encode "$3") in >out$k 2>&1 \
+      && compare /dev/null out$k
+}
+
+test_grep() {
+  k=$(expr $k + 1)
+  encode "$2" > exp$k
+  LC_ALL=$locale \
+    timeout 10s grep $1 $(encode "$3") exp$k > out$k 2>&1
+  test $? = 0 && compare exp$k out$k
+}
+
+failure_tests=@A
+successful_tests='%%AA @AA @A@@A'
+
+fail=0
+for i in $successful_tests; do
+  test_grep -F $i A || fail=1
+  test_grep -E $i A || fail=1
+done
+
+for i in $failure_tests; do
+  test_grep_reject -F $i A || fail=1
+  test_grep_reject -E $i A || fail=1
+done
+
+test_grep_reject -E @A '^$|A' || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/skip-device b/src/grep/tests/skip-device
new file mode 100755
index 0000000..d6368f1
--- /dev/null
+++ b/src/grep/tests/skip-device
@@ -0,0 +1,16 @@
+#!/bin/sh
+# grep must ignore --devices=ACTION (-D) when reading stdin
+# For grep-2.11, this test would fail.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+# Test both with no file argument, and with "-".
+echo foo | grep -D skip foo - || fail=1
+echo foo | grep --devices=skip foo || fail=1
+
+require_timeout_
+mkfifo myfifo || framework_failure_
+timeout 10 grep -D skip foo myfifo
+test $? -eq 1 || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/skip-read b/src/grep/tests/skip-read
new file mode 100755
index 0000000..1e9e718
--- /dev/null
+++ b/src/grep/tests/skip-read
@@ -0,0 +1,25 @@
+#!/bin/sh
+# Check that grep skips reading in some cases.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+echo /dev/null >exp || framework_failure_
+
+for opts in '-m0 y' '-f /dev/null' '-v ""'; do
+  for matcher in '' -E -F; do
+    for file in /dev/null no-such-file; do
+      eval returns_ 1 grep $opts $matcher no-such-file > out || fail=1
+      compare /dev/null out || fail=1
+      eval returns_ 1 grep -l $opts $matcher /dev/null > out || fail=1
+      compare /dev/null out || fail=1
+    done
+    eval returns_ 1 grep -L $opts $matcher /dev/null > out || fail=1
+    compare exp out || fail=1
+    eval returns_ 1 grep -L $opts $matcher /dev/null > /dev/null || fail=1
+  done
+done
+
+
+Exit $fail
diff --git a/src/grep/tests/spencer1 b/src/grep/tests/spencer1
new file mode 100755
index 0000000..56eaeda
--- /dev/null
+++ b/src/grep/tests/spencer1
@@ -0,0 +1,21 @@
+#! /bin/sh
+# Regression test for GNU grep.
+# Copyright (C) 1988 Henry Spencer.
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+# . . . and the following by Henry Spencer.
+
+${AWK-awk} -f $abs_top_srcdir/tests/spencer1.awk \
+    $abs_top_srcdir/tests/spencer1.tests > spencer1.script || fail=1
+
+. ./spencer1.script || fail=1
+
+Exit 1
diff --git a/src/grep/tests/spencer1-locale b/src/grep/tests/spencer1-locale
new file mode 100755
index 0000000..6a3d58a
--- /dev/null
+++ b/src/grep/tests/spencer1-locale
@@ -0,0 +1,23 @@
+#! /bin/sh
+# Regression test for GNU grep.
+#
+# Copyright (C) 1988 Henry Spencer.
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+# . . . and the following by Henry Spencer.
+
+${AWK-awk} -v extra_locale=$LOCALE_FR_UTF8 \
+    -f "$abs_srcdir/spencer1-locale.awk" "$abs_srcdir/spencer1.tests" \
+  > spencer1-locale.script || fail=1
+
+${re_shell-${SHELL-sh}} spencer1-locale.script || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/spencer1-locale.awk b/src/grep/tests/spencer1-locale.awk
new file mode 100644
index 0000000..36a2c5b
--- /dev/null
+++ b/src/grep/tests/spencer1-locale.awk
@@ -0,0 +1,32 @@
+# Copyright (C) 1988 Henry Spencer.
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+BEGIN {
+        FS = "@";
+        printf ("failures=0\n");
+}
+
+$0 !~ /^#/  && NF == 3 {
+        test("en_US.UTF-8")
+        test("ru_RU.KOI8-R")
+        test("fr_FR.ISO-8859-1")
+        test("zh_CN")
+        if (extra_locale != "") {
+                test(extra_locale)
+        }
+}
+
+function test(locale)
+{
+        printf ("status=$(echo '%s'| { LC_ALL=%s grep -E -e '%s' >/dev/null 2>&1 ; echo $?; })\n",$3, locale, $2);
+        printf ("if test $status -ne %s ; then\n", $1);
+        printf ("\techo Spencer test \\#%d failed \\(%s\\)\n", ++n, locale);
+        printf ("\tfailures=1\n");
+        printf ("fi\n");
+}
+
+END { printf ("exit $failures\n"); }
diff --git a/src/grep/tests/spencer1.awk b/src/grep/tests/spencer1.awk
new file mode 100644
index 0000000..6b9d3ee
--- /dev/null
+++ b/src/grep/tests/spencer1.awk
@@ -0,0 +1,22 @@
+# Copyright (C) 1988 Henry Spencer.
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+BEGIN {
+        FS = "@";
+        printf ("failures=0\n");
+}
+
+$0 !~ /^#/  && NF == 3 {
+#	printf ("status=$(echo '%s'| { grep -E -e '%s' > /dev/null 2>&1; echo $?; cat >/dev/null; })\n",$3, $2);
+        printf ("status=$(echo '%s'| { grep -E -e '%s' >/dev/null 2>&1 ; echo $?; })\n",$3, $2);
+        printf ("if test $status -ne %s ; then\n", $1);
+        printf ("\techo Spencer test \\#%d failed\n", ++n);
+        printf ("\tfailures=1\n");
+        printf ("fi\n");
+}
+
+END { printf ("exit $failures\n"); }
diff --git a/src/grep/tests/spencer1.tests b/src/grep/tests/spencer1.tests
new file mode 100644
index 0000000..50581e8
--- /dev/null
+++ b/src/grep/tests/spencer1.tests
@@ -0,0 +1,144 @@
+0@abc@abc
+1@abc@xbc
+1@abc@axc
+1@abc@abx
+0@abc@xabcy
+0@abc@ababc
+0@ab*c@abc
+0@ab*bc@abc
+0@ab*bc@abbc
+0@ab*bc@abbbbc
+0@ab+bc@abbc
+1@ab+bc@abc
+1@ab+bc@abq
+0@ab+bc@abbbbc
+0@ab?bc@abbc
+0@ab?bc@abc
+1@ab?bc@abbbbc
+0@ab?c@abc
+0@^abc$@abc
+1@^abc$@abcc
+0@^abc@abcc
+1@^abc$@aabc
+0@abc$@aabc
+0@^@abc
+0@$@abc
+0@a.c@abc
+0@a.c@axc
+0@a.*c@axyzc
+1@a.*c@axyzd
+1@a[bc]d@abc
+0@a[bc]d@abd
+1@a[b-d]e@abd
+0@a[b-d]e@ace
+0@a[b-d]@aac
+0@a[-b]@a-
+0@a[b-]@a-
+2@a[b-a]@-
+2@a[]b@-
+2@a[@-
+0@a]@a]
+0@a[]]b@a]b
+0@a[^bc]d@aed
+1@a[^bc]d@abd
+0@a[^-b]c@adc
+1@a[^-b]c@a-c
+1@a[^]b]c@a]c
+0@a[^]b]c@adc
+0@ab|cd@abc
+0@ab|cd@abcd
+0@()ef@def
+0@()*@-
+1@*a@-
+0@^*@-
+0@$*@-
+2@(*)b@-@TO CORRECT
+1@$b@b
+2@a\@-
+0@a\(b@a(b
+0@a\(*b@ab
+0@a\(*b@a((b
+1@a\x@a\x
+1@abc)@-
+2@(abc@-
+0@((a))@abc
+0@(a)b(c)@abc
+0@a+b+c@aabbabc
+0@a**@-
+0@a*?@-
+0@(a*)*@-
+0@(a*)+@-
+0@(a|)*@-
+0@(a*|b)*@-
+0@(a+|b)*@ab
+0@(a+|b)+@ab
+0@(a+|b)?@ab
+0@[^ab]*@cde
+0@(^)*@-
+0@(ab|)*@-
+2@)(@-
+1@abc@
+1@abc@
+0@a*@
+0@([abc])*d@abbbcd
+0@([abc])*bcd@abcd
+0@a|b|c|d|e@e
+0@(a|b|c|d|e)f@ef
+0@((a*|b))*@-
+0@abcd*efg@abcdefg
+0@ab*@xabyabbbz
+0@ab*@xayabbbz
+0@(ab|cd)e@abcde
+0@[abhgefdc]ij@hij
+1@^(ab|cd)e@abcde
+0@(abc|)ef@abcdef
+0@(a|b)c*d@abcd
+0@(ab|ab*)bc@abc
+0@a([bc]*)c*@abc
+0@a([bc]*)(c*d)@abcd
+0@a([bc]+)(c*d)@abcd
+0@a([bc]*)(c+d)@abcd
+0@a[bcd]*dcdcde@adcdcde
+1@a[bcd]+dcdcde@adcdcde
+0@(ab|a)b*c@abc
+0@((a)(b)c)(d)@abcd
+0@[A-Za-z_][A-Za-z0-9_]*@alpha
+0@^a(bc+|b[eh])g|.h$@abh
+0@(bc+d$|ef*g.|h?i(j|k))@effgz
+0@(bc+d$|ef*g.|h?i(j|k))@ij
+1@(bc+d$|ef*g.|h?i(j|k))@effg
+1@(bc+d$|ef*g.|h?i(j|k))@bcdd
+0@(bc+d$|ef*g.|h?i(j|k))@reffgz
+1@((((((((((a))))))))))@-
+0@(((((((((a)))))))))@a
+0@ca{0,0}b@cb
+1@ca{0,0}b@cab
+0@ca{0,1}b@cb
+0@ca{0,1}b@cab
+1@ca{0,1}b@caab
+1@ca{1,2}b@cb
+0@ca{1,2}b@cab
+0@ca{1,2}b@caab
+1@ca{1,2}b@caaab
+1@multiple words of text@uh-uh
+0@multiple words@multiple words, yeah
+0@(.*)c(.*)@abcde
+1@\((.*),@(.*)\)
+1@[k]@ab
+0@abcd@abcd
+0@a(bc)d@abcd
+0@a[
-]?c@ac
+0@a[
]?c@ac
+0@(....).*\1@beriberi
+0@(^|\B)a@abc
+0@(^|\B)a@xyzabc
+1@(^|\B)a@xyz abc
+0@^a|\Ba@abc
+0@^a|\Ba@xyzabc
+1@^a|\Ba@xyz abc
+0@(^|\>)a@abc
+1@(^|\>)a@xyzabc
+1@(^|\>)a@xyz abc
+0@^a|\>a@abc
+1@^a|\>a@xyzabc
+1@^a|\>a@xyz abc
diff --git a/src/grep/tests/stack-overflow b/src/grep/tests/stack-overflow
new file mode 100755
index 0000000..d4d4b43
--- /dev/null
+++ b/src/grep/tests/stack-overflow
@@ -0,0 +1,53 @@
+#!/bin/sh
+# Ensure a stack overflow no longer segfaults
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+case $host_triplet in
+  *-midnightbsd*)
+    skip_ 'our stack-overflow detection does not work on this system';;
+esac
+
+# When compiled with ASAN, skip this test, because (on Fedora 32) it
+# would fail due to output like this on stderr:
+# +==2176827==WARNING: ASan is ignoring requested __asan_handle_no_return:
+#   stack top: 0x7ffc48f20000; bottom 0x000000e25000; size: 0x7ffc480fb000 (140721517473792)
+# +False positive error reports may follow
+# +For details see https://github.com/google/sanitizers/issues/189
+ASAN_OPTIONS=help=true grep --version 2>&1 | grep -q AddressSanitizer \
+  && skip_ 'avoid false failure when built with ASAN'
+
+echo grep: stack overflow > exp || framework_failure_
+
+# Limit stack size.  Otherwise, it appears to be too hard to overflow the
+# stack on some systems like gcc113, aarch64/linux-3.13.0 with 32GB of RAM
+# and 20GB of swap.
+ulimit -s 8192 2>/dev/null
+
+# grep attempts to detect overflow via gnulib's c-stack module.
+# Trigger that with an input regex composed solely of open parentheses,
+# increasing the size of that input until grep emits the expected diagnostic.
+fail=0
+for i in 1 3 5 10 20 30 40 50 100 200 400 1000; do
+  # Create a file containing $i * 10000 open parentheses:
+  printf %0${i}0000d 0|tr 0 '(' > in || framework_failure_
+  grep -E -f in >out 2>err; st=$?
+  if grep -q 'stack overflow' err; then
+    test $st = 2 || fail=1
+    compare /dev/null out || fail=1
+    compare exp err || fail=1
+    test $fail = 0 && Exit 0
+    fail_ 'printed "stack overflow", but something else was wrong'
+  fi
+done
+
+# If there was no stack overflow message and the final run exited with
+# status 1 and both stdout and stderr were empty, then assume it's a working
+# regex that avoids the internal stack overflow problem like glibc's regexp
+# used to.
+test $st = 1 \
+  && ! test -s out \
+  && ! test -s err \
+  && Exit 0
+
+fail_ 'grep never printed "stack overflow"'
diff --git a/src/grep/tests/status b/src/grep/tests/status
new file mode 100755
index 0000000..4b15426
--- /dev/null
+++ b/src/grep/tests/status
@@ -0,0 +1,73 @@
+#! /bin/sh
+# Test for status code for GNU grep.
+# status code
+#  0 match found
+#  1 no match
+#  2 file not found
+#
+# Copyright (C) 2001, 2006, 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+# should return 0 found a match
+echo "abcd" | grep -E -e 'abc' > /dev/null 2>&1
+if test $? -ne 0 ; then
+        echo "Status: Wrong status code, test \#1 failed"
+        fail=1
+fi
+
+# should return 1 found no match
+echo "abcd" | grep -E -e 'zbc' > /dev/null 2>&1
+if test $? -ne 1 ; then
+        echo "Status: Wrong status code, test \#2 failed"
+        fail=1
+fi
+
+# the filename MMMMMMMM.MMM should not exist hopefully
+if test -r MMMMMMMM.MMM; then
+        echo "Please remove MMMMMMMM.MMM to run check"
+else
+        # should return 2 file not found
+        grep -E -e 'abc' MMMMMMMM.MMM > /dev/null 2>&1
+        if test $? -ne 2 ; then
+                echo "Status: Wrong status code, test \#3 failed"
+                fail=1
+        fi
+
+        # should return 2 file not found
+        grep -E -s -e 'abc' MMMMMMMM.MMM > /dev/null 2>&1
+        if test $? -ne 2 ; then
+                echo "Status: Wrong status code, test \#4 failed"
+                fail=1
+        fi
+
+        # should return 0 (found a match) or 2 (file not found)
+        echo "abcd" | grep -E -s 'abc' - MMMMMMMM.MMM > /dev/null 2>&1
+        status=$?
+        if test $status -ne 0 && test $status -ne 2 ; then
+                echo "Status: Wrong status code, test \#5 failed"
+                fail=1
+        fi
+
+        # should return 0 found a match
+        echo "abcd" | grep -E -q -s 'abc' MMMMMMMM.MMM - > /dev/null 2>&1
+        if test $? -ne 0 ; then
+                echo "Status: Wrong status code, test \#6 failed"
+                fail=1
+        fi
+
+        # should still return 0 found a match
+        echo "abcd" | grep -E -q 'abc' MMMMMMMM.MMM - > /dev/null 2>&1
+        if test $? -ne 0 ; then
+                echo "Status: Wrong status code, test \#7 failed"
+                fail=1
+        fi
+fi
+
+Exit $fail
diff --git a/src/grep/tests/surrogate-pair b/src/grep/tests/surrogate-pair
new file mode 100755
index 0000000..a91fa36
--- /dev/null
+++ b/src/grep/tests/surrogate-pair
@@ -0,0 +1,60 @@
+#!/bin/sh
+# Check the handling of characters outside the Unicode BMP.
+
+# Copyright (C) 2013-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+require_compiled_in_MB_support
+
+fail=0
+
+s_pair=$(printf '\360\220\220\205')
+printf '%s\n' "$s_pair" > in || framework_failure_
+
+LC_ALL=en_US.UTF-8
+export LC_ALL
+
+# On Cygwin, before grep-2.15, this would segfault.
+# Require not just non-zero exit status, but exactly 1.
+returns_ 1 grep -i anything-else in > out 2>&1 || fail=1
+# Expect no output.
+compare /dev/null out || fail=1
+
+# This must always match, even on a 16-bit-wchar_t system.
+grep . in > out 2> err || fail=1
+
+# On platforms where wchar_t is only 16 bits, wchar_t cannot represent
+# the character encoded in 'in'.
+
+# On such old systems the above prints nothing on stdout and a diagnostic
+# on stderr.  In that case, return early; otherwise, the following tests
+# would all fail.
+io_pair=$(cat out):$(cat err)
+case $io_pair in
+  :'grep: in: binary file matches') Exit $fail;;
+  $s_pair:) ;;
+  *) fail_ "unexpected output: $io_pair"; fail=1;;
+esac
+
+# Also test whether a surrogate-pair in the search string works.
+for opt in '' -i -E -F -iE -iF; do
+  grep --file=in $opt in > out 2>&1 || fail=1
+  compare out in || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/symlink b/src/grep/tests/symlink
new file mode 100755
index 0000000..b580ce7
--- /dev/null
+++ b/src/grep/tests/symlink
@@ -0,0 +1,67 @@
+#!/bin/sh
+# Check that "grep -r" does the right thing with symbolic links.
+
+# Copyright (C) 2012-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# written by Paul Eggert
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+mkdir dir || framework_failure_
+echo a > dir/a || framework_failure_
+echo b > dir/b || framework_failure_
+ln -s a dir/c || framework_failure_
+ln -s . dir/d || framework_failure_
+ln -s dangling dir/e || framework_failure_
+
+touch out || framework_failure_
+
+for recursion in '' -r -R
+do
+  for files in '' '*'
+  do
+    case $recursion,$files in
+      -R,* | *,'*') expected_status=2 ;;
+      *) expected_status=0 ;;
+    esac
+
+    (cd dir && grep $recursion '^' $files <a ) >grepout
+    test $? -eq $expected_status || fail=1
+
+    case $recursion,$files in
+      ,)
+         exp='a\n' ;;
+      ,'*' | -R,)
+         exp='a:a\nb:b\nc:a\n' ;;
+      -r,)
+         exp='a:a\nb:b\n' ;;
+      -r,'*')
+         exp='a:a\nb:b\nc:a\nd/a:a\nd/b:b\n' ;;
+      -R,'*')
+         exp='a:a\nb:b\nc:a\nd/a:a\nd/b:b\nd/c:a\n' ;;
+      *)
+         framework_failure_ ;;
+    esac
+
+    printf "$exp" >exp || framework_failure_
+
+    LC_ALL=C sort grepout >out || fail=1
+
+    compare exp out || fail=1
+  done
+done
+
+Exit $fail
diff --git a/src/grep/tests/triple-backref b/src/grep/tests/triple-backref
new file mode 100755
index 0000000..796fa7b
--- /dev/null
+++ b/src/grep/tests/triple-backref
@@ -0,0 +1,30 @@
+#! /bin/sh
+# Test for a bug in glibc's regex code as of September 7, 2014.
+#
+# Copyright (C) 2014-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+# This tickles a bug in the regex code that can cause heap violations etc.
+# A fix would be welcome, though fixing is not trivial.  See:
+# https://sourceware.org/bugzilla/show_bug.cgi?id=11053
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_timeout_
+
+echo a > in || framework_failure_
+
+fail=0
+
+# Clear this, so glibc doesn't bother to produce a core dump.
+MALLOC_CHECK_=
+
+warn_ "$ME_: expect malfunction on glibc systems due to" \
+   "https://sourceware.org/bugzilla/show_bug.cgi?id=11053"
+
+timeout 10 grep -E '(.?)(.?)(.?)\3\2\1' in > out || fail=1
+compare out in || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/turkish-I b/src/grep/tests/turkish-I
new file mode 100755
index 0000000..cfe90c2
--- /dev/null
+++ b/src/grep/tests/turkish-I
@@ -0,0 +1,33 @@
+#!/bin/sh
+# grep -i in UTF-8: missing NL in output on line containing I WITH DOT (U+0130)
+
+# Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+require_compiled_in_MB_support
+
+fail=0
+
+i='\304\260'
+printf "$i$i$i$i$i$i$i\n" > in || framework_failure_
+
+LC_ALL=en_US.UTF-8 grep -i .... in > out || fail=1
+
+compare out in || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/turkish-I-without-dot b/src/grep/tests/turkish-I-without-dot
new file mode 100755
index 0000000..127ec2f
--- /dev/null
+++ b/src/grep/tests/turkish-I-without-dot
@@ -0,0 +1,55 @@
+#!/bin/sh
+# grep -i would misbehave for any matched line containing a character
+# (like "I" in the tr_TR.utf8 locale) whose lower-case representation
+# occupies more bytes (two in this case, for 0xc4b1, aka U+0131).
+
+# Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_tr_utf8_locale_
+require_compiled_in_MB_support
+
+# Before this change, grep could print a lot of uninitialized memory:
+# $ printf "IIIIIII\n" > in
+# $ for i in $(seq 10); do LC_ALL=tr_TR.utf8 src/grep -i . in|wc -c; done
+# 760
+# 754
+# 585
+# 298
+# 273
+# 458
+# 660
+# 552
+# 936
+# 678
+
+fail=0
+
+printf "IIIIIII\n" > in || framework_failure_
+LC_ALL=tr_TR.utf8 grep -i .... in > out || fail=1
+compare out in || fail=1
+
+# Also exercise the case in which the original string and the lower-case
+# buffer have precisely the same length (22 bytes here), yet internal
+# offsets do differ.  Lengths are the same because while some bytes shrink
+# when converted to lower case, others grow, and here they balance out.
+i='I\304\260'
+printf "$i$i$i$i$i$i$i\n" > in || framework_failure_
+LC_ALL=tr_TR.utf8 grep -i .... in > out || fail=1
+compare out in || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/turkish-eyes b/src/grep/tests/turkish-eyes
new file mode 100755
index 0000000..2969d09
--- /dev/null
+++ b/src/grep/tests/turkish-eyes
@@ -0,0 +1,58 @@
+#!/bin/sh
+# Ensure that case-insensitive matching works with all Turkish i's
+
+# Copyright (C) 2014-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_compiled_in_MB_support
+
+fail=0
+
+L=tr_TR.UTF-8
+
+# Check for a broken tr_TR.UTF-8 locale definition.
+# In this locale, 'i' is not a lower-case 'I'.
+echo I | LC_ALL=$L grep -i i > /dev/null \
+    && skip_ "your $L locale appears to be broken"
+
+# Ensure that this matches:
+# printf 'I:İ ı:i\n'|LC_ALL=tr_TR.utf8 grep -i 'ı:i I:İ'
+I=$(printf '\304\260') # capital I with dot
+i=$(printf '\304\261') # lowercase dotless i
+
+      data="I:$I $i:i"
+search_str="$i:i I:$I"
+printf "$data\\n" > in || framework_failure_
+
+for opt in -E -F -G; do
+  for pat in i I "$i" "$I" " " : "$search_str"; do
+    LC_ALL=$L grep $opt -i "$pat" in > out || fail=1
+    compare in out || fail=1
+
+    case $pat in
+      i|"$I") printf "$I\\ni\\n";;
+      I|"$i") printf "I\\n$i\\n";;
+      :) printf ":\\n:\\n";;
+      ' ') printf " \\n";;
+      *) cat in;;
+    esac >exp || framework_failure_
+    LC_ALL=$L grep -o $opt -i "$pat" in > out || fail=1
+    compare exp out || fail=1
+  done
+done
+
+Exit $fail
diff --git a/src/grep/tests/two-chars b/src/grep/tests/two-chars
new file mode 100755
index 0000000..f866d6a
--- /dev/null
+++ b/src/grep/tests/two-chars
@@ -0,0 +1,24 @@
+#! /bin/sh
+# Check for grep -F with two patterns consisting of the same char.
+#
+# Copyright 2016-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+
+fail=0
+
+for LOC in en_US.UTF-8 $zh $LOCALE_FR_UTF8; do
+  printf '0\n0\n' >pat
+  printf '0\n' >in
+  out=out-$LOC
+  LC_ALL=$LOC grep -Ff pat in >$out || fail=1
+  compare in $out || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/two-files b/src/grep/tests/two-files
new file mode 100755
index 0000000..0129a9d
--- /dev/null
+++ b/src/grep/tests/two-files
@@ -0,0 +1,22 @@
+#! /bin/sh
+# Read two files, of increasing size.
+# With ASAN, this would have triggered a false-positive read of poisoned memory.
+#
+# Copyright 2015-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+printf a > 1 || framework_failure_
+printf ab > 2 || framework_failure_
+
+grep x 1 2 > out 2>&1
+test $? -eq 1 || fail=1
+compare /dev/null out || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/unibyte-binary b/src/grep/tests/unibyte-binary
new file mode 100755
index 0000000..f76276f
--- /dev/null
+++ b/src/grep/tests/unibyte-binary
@@ -0,0 +1,32 @@
+#!/bin/sh
+# Test binary files in unibyte locales with encoding errors
+
+# Copyright 2016-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_unibyte_locale
+
+fail=0
+
+printf 'a\n\200\nb\n' >in || framework_failure_
+printf 'a\n' >exp || framework_failure_
+grep . in >out || fail=1
+
+# In some unibyte locales, \200 is an encoding error;
+# in others, it is a valid character.  Allow either possibility.
+compare exp out || compare in out || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/unibyte-bracket-expr b/src/grep/tests/unibyte-bracket-expr
new file mode 100755
index 0000000..4ee481f
--- /dev/null
+++ b/src/grep/tests/unibyte-bracket-expr
@@ -0,0 +1,43 @@
+#!/bin/sh
+# Exercise a DFA range bug that arises only with a unibyte encoding
+# for which the wide-char-to-single-byte mapping is nontrivial.
+# E.g., the regexp, [C] would fail to match C in a unibyte locale like
+# ru_RU.KOI8-R for any C whose wide-char representation differed from
+# its single-byte equivalent.
+
+# Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_ru_RU_koi8_r
+LC_ALL=ru_RU.KOI8-R
+export LC_ALL
+
+fail=0
+
+i=128
+while :; do
+  in=in-$i
+  octal=$(printf '%03o' $i)
+  b=$(printf "\\$octal")
+  echo "$b" > $in || framework_failure_
+  grep "[$b]" $in > out || fail=1
+  compare out $in || fail=1
+
+  test $i = 255 && break
+  i=$(expr $i + 1)
+done
+
+Exit $fail
diff --git a/src/grep/tests/unibyte-negated-circumflex b/src/grep/tests/unibyte-negated-circumflex
new file mode 100755
index 0000000..47426be
--- /dev/null
+++ b/src/grep/tests/unibyte-negated-circumflex
@@ -0,0 +1,27 @@
+#!/bin/sh
+# Exercise a bug where [^^-^] was treated as if it were [^-^].
+
+# Copyright 2014-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_unibyte_locale
+
+fail=0
+
+echo a >in || framework_failure_
+grep '[^^-^]' in >out || fail=1
+compare out in || fail=1
+Exit $fail
diff --git a/src/grep/tests/utf8-bracket b/src/grep/tests/utf8-bracket
new file mode 100755
index 0000000..0d31ece
--- /dev/null
+++ b/src/grep/tests/utf8-bracket
@@ -0,0 +1,40 @@
+#!/bin/sh
+# Check bracket expressions in a UTF-8 locale.
+
+# Copyright 2015-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_en_utf8_locale_
+
+printf '1\n2\n' >in || framework_failure_
+
+fail=0
+
+for locale in C en_US.UTF-8; do
+  for options in -qz -qzE; do
+    case $options in
+      *E*) parens='()';;
+      *) parens='\(\)';;
+    esac
+    for pattern in '1.2' '[12].2' '[1-2].2' '[1-2][^a][1-2]'; do
+      for suffix in '' "$parens\\1"; do
+        LC_ALL=$locale grep $options "$pattern$suffix" in || fail=1
+      done
+    done
+  done
+done
+
+Exit $fail
diff --git a/src/grep/tests/warn-char-classes b/src/grep/tests/warn-char-classes
new file mode 100755
index 0000000..b1db240
--- /dev/null
+++ b/src/grep/tests/warn-char-classes
@@ -0,0 +1,39 @@
+#!/bin/sh
+# Use of any --include or --exclude* option would segfault in 2.6 and 2.6.1
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+echo f > x || framework_failure_
+echo b >> x || framework_failure_
+echo h >> x || framework_failure_
+printf 'grep: character class syntax is [[:space:]], not [:space:]\n' \
+  > exp-err || framework_failure_
+
+# basic cases
+
+returns_ 2 grep '[:space:]' x 2> err || fail=1
+sed 's/^\([A-Za-z]:\)\{0,1\}[^: ]*: /grep: /' err > err1 && mv err1 err
+compare exp-err err || fail=1
+
+returns_ 1 grep '[[:space:]]' x 2> err || fail=1
+test -s err && fail=1
+
+# disabled by POSIXLY_CORRECT
+returns_ 1 env POSIXLY_CORRECT=yes grep '[:space:]' x 2> err || fail=1
+test -s err && fail=1
+
+# patterns that are considered valid
+returns_ 1 grep '[::]' x 2> err || fail=1
+test -s err && fail=1
+
+returns_ 1 grep '[:space]' x 2> err || fail=1
+test -s err && fail=1
+
+returns_ 1 grep '[:space:wxyz]' x 2> err || fail=1
+test -s err && fail=1
+
+returns_ 1 grep '[:space[:space:]:]' x 2> err || fail=1
+test -s err && fail=1
+
+returns_ 1 grep '[:spac-e:]' x 2> err || fail=1
+test -s err && fail=1
+Exit $fail
diff --git a/src/grep/tests/word-delim-multibyte b/src/grep/tests/word-delim-multibyte
new file mode 100755
index 0000000..31190ad
--- /dev/null
+++ b/src/grep/tests/word-delim-multibyte
@@ -0,0 +1,45 @@
+#!/bin/sh
+# exercise \< and \> with multibyte data.
+# Derived from https://savannah.gnu.org/bugs/?29537
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+
+e_acute=$(printf '\303\251')
+echo "$e_acute" > in || framework_failure_
+LC_ALL=en_US.UTF-8
+export LC_ALL
+
+fail=0
+
+grep "\\<$e_acute" in > out 2>err || fail=1
+compare out in || fail=1
+compare /dev/null err || fail=1
+
+grep "$e_acute\\>" in > out 2>err || fail=1
+compare out in || fail=1
+compare /dev/null err || fail=1
+
+grep -w "$e_acute" in > out 2>err || fail=1
+compare out in || fail=1
+compare /dev/null err || fail=1
+
+# Also ensure that this works in both the C locale and that multibyte one.
+# In the C locale, it failed due to a dfa.c regression in grep-3.2.
+echo 123-x > in || framework_failure_
+
+for locale in C en_US.UTF-8; do
+  LC_ALL=$locale grep '.\bx' in > out 2>err || fail=1
+  compare out in || fail=1
+  compare /dev/null err || fail=1
+done
+
+# Bug#43255
+printf 'a \303\255cone b\n' >in
+for flag in '' -i; do
+  returns_ 1 env LC_ALL=en_US.UTF-8 grep -w $flag cone in >out 2>err || fail=1
+  compare /dev/null out || fail=1
+  compare /dev/null err || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/word-multi-file b/src/grep/tests/word-multi-file
new file mode 100755
index 0000000..4b63520
--- /dev/null
+++ b/src/grep/tests/word-multi-file
@@ -0,0 +1,29 @@
+#!/bin/sh
+# exercise the -w option on multiple files
+# Derived from https://bugzilla.redhat.com/570500
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+mkdir a || framework_failure_
+( cd a \
+    && echo aa bb cc > 1 \
+    && echo bb dd ff > 2 \
+    && echo ff gg hh > 3 \
+    && echo bb xx zz > 4 \
+) || framework_failure_
+
+cat << \EOF > exp1 || framework_failure_
+a/1:aa bb cc
+a/2:bb dd ff
+a/4:bb xx zz
+EOF
+sed s/..// exp1 > exp2 || framework_failure_
+
+fail=0
+grep -rw bb a > out || fail=1
+sort < out > k; mv k out
+compare exp1 out || fail=1
+
+(cd a && grep -w bb [1-4]) > out || fail=1
+compare exp2 out || fail=1
+
+Exit $fail
diff --git a/src/grep/tests/word-multibyte b/src/grep/tests/word-multibyte
new file mode 100755
index 0000000..9cbb71f
--- /dev/null
+++ b/src/grep/tests/word-multibyte
@@ -0,0 +1,30 @@
+#!/bin/sh
+# This would fail for grep-2.20
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+
+e_acute=$(printf '\303\251')
+printf "$e_acute\n" > in || framework_failure_
+
+# Use this locale only if it is installed.
+zh=zh_CN.UTF-8
+path_prepend_ .
+case $(get-mb-cur-max $zh) in
+  [456]) ;;
+  *) zh=;;
+esac
+
+fail=0
+
+for LOC in en_US.UTF-8 $zh $LOCALE_FR_UTF8; do
+  out=out1-$LOC
+  LC_ALL=$LOC grep '\w' in >$out || fail=1
+  compare in $out || fail=1
+
+  out=out2-$LOC
+  LC_ALL=$LOC grep '\W' in >$out && fail=1
+  compare /dev/null $out || fail=1
+done
+
+Exit $fail
diff --git a/src/grep/tests/write-error-msg b/src/grep/tests/write-error-msg
new file mode 100755
index 0000000..f992df5
--- /dev/null
+++ b/src/grep/tests/write-error-msg
@@ -0,0 +1,55 @@
+#!/bin/sh
+# Ensure that output errors are reported with errno information.
+
+# Copyright 2016-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+test -e /dev/full || skip_ your system lacks /dev/full
+
+export LC_ALL=C
+
+# generate large input, filling the libc stdio buffers
+# and triggering a write(2) even without line buffering.
+yes 12345 | head -n 50000 > in || framework_failure_
+
+fail=0
+
+# disk-full error, line buffered
+# (note: GNU grep returns 2 on error)
+returns_ 2 grep --line-buffered -v '^$' <in >/dev/full 2>err1 \
+    || framework_failure_
+
+# disk-full error, unbuffered
+# (note: GNU grep returns 2 on error)
+returns_ 2 grep -v '^$' <in >/dev/full 2>err2 \
+    || framework_failure_
+
+# ensure each error message file contains a 'write error' with additional text
+for f in err1 err2 ;
+do
+    grep -Eiq '^[^:]*: write error: [a-z]+' $f \
+        || {
+             warn_ "incorrect/missing error message in file $f"
+             compare /dev/null $f   # print the content in the logs
+             fail=1
+           }
+done
+
+# These messages should be identical
+compare err1 err2 \
+    || { warn_ "err1,err2 contain different error messages" ; fail=1 ; }
+
+Exit $fail
diff --git a/src/grep/tests/yesno b/src/grep/tests/yesno
new file mode 100755
index 0000000..be03d2c
--- /dev/null
+++ b/src/grep/tests/yesno
@@ -0,0 +1,135 @@
+#! /bin/sh
+# Test feature interaction of -C, -v, -o, and -m.
+#
+# Copyright (C) 2001, 2006, 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+#
+# This set of tests was started by Charles Levert.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+: ${VERBOSE=}  # empty or "1"
+failures=0
+
+# Lines, including terminating LF, contain 10 octets.
+# The words "yes" and "no" are at zero-based octet offsets of 5, 15, ...
+yn='yesno.txt'
+cat > "$yn" <<EOF
+[A01 no ]
+[B02 no ]
+[C03 yes]
+[D04 yes]
+[E05 yes]
+[F06 no ]
+[G07 no ]
+[H08 yes]
+[I09 yes]
+[J10 no ]
+[K11 no ]
+[L12 no ]
+[M13 yes]
+[N14 yes]
+EOF
+# Noticed the symmetry?
+
+# All possible output substrings (lines):
+#      selected whole,         rejected whole, never-read whole,   selected part,   rejected part.
+   A='1:0:[A01 no ]/';    rA='1-0-[A01 no ]/'; XA='X[A01 no ]/';
+  B='2:10:[B02 no ]/';   rB='2-10-[B02 no ]/'; XB='X[B02 no ]/';
+  C='3:20:[C03 yes]/';   rC='3-20-[C03 yes]/'; XC='X[C03 yes]/';   c='3:25:yes/';   rc='3-25-yes/'
+  D='4:30:[D04 yes]/';   rD='4-30-[D04 yes]/'; XD='X[D04 yes]/';   d='4:35:yes/';   rd='4-35-yes/'
+  E='5:40:[E05 yes]/';   rE='5-40-[E05 yes]/'; XE='X[E05 yes]/';   e='5:45:yes/';   re='5-45-yes/'
+  F='6:50:[F06 no ]/';   rF='6-50-[F06 no ]/'; XF='X[F06 no ]/';
+  G='7:60:[G07 no ]/';   rG='7-60-[G07 no ]/'; XG='X[G07 no ]/';
+  H='8:70:[H08 yes]/';   rH='8-70-[H08 yes]/'; XH='X[H08 yes]/';   h='8:75:yes/';   rh='8-75-yes/'
+  I='9:80:[I09 yes]/';   rI='9-80-[I09 yes]/'; XI='X[I09 yes]/';   i='9:85:yes/';   ri='9-85-yes/'
+ J='10:90:[J10 no ]/';  rJ='10-90-[J10 no ]/'; XJ='X[J10 no ]/';
+K='11:100:[K11 no ]/'; rK='11-100-[K11 no ]/'; XK='X[K11 no ]/';
+L='12:110:[L12 no ]/'; rL='12-110-[L12 no ]/'; XL='X[L12 no ]/';
+M='13:120:[M13 yes]/'; rM='13-120-[M13 yes]/'; XM='X[M13 yes]/'; m='13:125:yes/'; rm='13-125-yes/'
+N='14:130:[N14 yes]/'; rN='14-130-[N14 yes]/'; XN='X[N14 yes]/'; n='14:135:yes/'; rn='14-135-yes/'
+# Group separators.
+s='--/'
+S='XYZ/'
+# Exit statuses.
+z0='?0/'
+z1='?1/'
+z2='?2/'
+
+# What needs fixing?  Specification, documentation, implementation, or this?
+# The individual tests.
+set x \
+  ''                "$C$D$E$H$I$M$N$z0" \
+  '-o'              "$c$d$e$h$i$m$n$z0" \
+  '-C,1'            "$rB$C$D$E$rF$rG$H$I$rJ$s$rL$M$N$z0" \
+  '-C,1,-o'         "$c$d$e$h$i$s$m$n$z0" \
+  '-C,1,-o,--group=XYZ' "$c$d$e$h$i$S$m$n$z0" \
+  '-C,1,-o,--no-gr' "$c$d$e$h$i$m$n$z0" \
+  '-C,4,-1'         "$rB$C$D$E$rF$rG$H$I$rJ$s$rL$M$N$z0" \
+  '-C,1,--group=XYZ' "$rB$C$D$E$rF$rG$H$I$rJ$S$rL$M$N$z0" \
+  '-C,1,--no-gr'    "$rB$C$D$E$rF$rG$H$I$rJ$rL$M$N$z0" \
+  '-m,4'            "$C$D$E$H$z0$XI$XJ$XK$XL$XM$XN" \
+  '-m,4,-o'         "$c$d$e$h$z0$XI$XJ$XK$XL$XM$XN" \
+  '-m,4,-C,1'       "$rB$C$D$E$rF$rG$H$rI$z0$XI$XJ$XK$XL$XM$XN" \
+  '-m,4,-C,1,-o'    "$c$d$e$h$z0$XI$XJ$XK$XL$XM$XN" \
+  '-m,5'            "$C$D$E$H$I$z0$XJ$XK$XL$XM$XN" \
+  '-m,5,-o'         "$c$d$e$h$i$z0$XJ$XK$XL$XM$XN" \
+  '-m,5,-C,1,-o'    "$c$d$e$h$i$z0$XJ$XK$XL$XM$XN" \
+  '-m,6'            "$C$D$E$H$I$M$z0$XN" \
+  '-m,6,-o'         "$c$d$e$h$i$m$z0$XN" \
+  '-m,6,-C,1'       "$rB$C$D$E$rF$rG$H$I$rJ$s$rL$M$rN$z0$XN" \
+  '-m,6,-C,1,-o'    "$c$d$e$h$i$s$m$z0$XN" \
+  '-v'              "$A$B$F$G$J$K$L$z0" \
+  '-v,-o'           "$z0" \
+  '-v,-C,1'         "$A$B$rC$s$rE$F$G$rH$rI$J$K$L$rM$z0" \
+  '-v,-C,1,-o'      "$rc$s$re$rh$ri$rm$z0" \
+  '-v,-C,1,--group=XYZ' "$A$B$rC$S$rE$F$G$rH$rI$J$K$L$rM$z0" \
+  '-v,-C,1,--no-gr' "$A$B$rC$rE$F$G$rH$rI$J$K$L$rM$z0" \
+  '-4,-1'           "$rB$C$D$E$rF$rG$H$I$rJ$s$rL$M$N$z0" \
+  '-4,-v,-1'        "$A$B$rC$s$rE$F$G$rH$rI$J$K$L$rM$z0" \
+  '-m,1,-v'         "$A$z0$XB$XC$XD$XE$XF$XG$XH$XI$XJ$XK$XL$XM$XN" \
+  '-m,1,-v,-o'      "$z0$XB$XC$XD$XE$XF$XG$XH$XI$XJ$XK$XL$XM$XN" \
+  '-m,1,-v,-C,1'    "$A$rB$z0$XB$XC$XD$XE$XF$XG$XH$XI$XJ$XK$XL$XM$XN" \
+  '-m,1,-v,-C,1,-o' "$z0$XB$XC$XD$XE$XF$XG$XH$XI$XJ$XK$XL$XM$XN" \
+  '-m,2,-v'         "$A$B$z0$XC$XD$XE$XF$XG$XH$XI$XJ$XK$XL$XM$XN" \
+  '-m,2,-v,-o'      "$z0$XC$XD$XE$XF$XG$XH$XI$XJ$XK$XL$XM$XN" \
+  '-m,3,-v'         "$A$B$F$z0$XG$XH$XI$XJ$XK$XL$XM$XN" \
+  '-m,3,-v,-o'      "$z0$XG$XH$XI$XJ$XK$XL$XM$XN" \
+  '-m,3,-v,-C,1'    "$A$B$rC$s$rE$F$rG$z0$XG$XH$XI$XJ$XK$XL$XM$XN" \
+  '-m,3,-v,-C,1,-o' "$rc$s$re$z0$XG$XH$XI$XJ$XK$XL$XM$XN" \
+  x
+shift
+# Comment out cases that are known to fail. These should be uncommented after the 2.5.4 release. TAA.
+# These should be added back in above and fixed in the code. TAA.
+#  '-m,5,-C,1'       "$rB$C$D$E$rF$rG$H$I$z0$XJ$XK$XL$XM$XN" \
+#  '-m,2,-v,-C,1'    "$A$B$z0$XC$XD$XE$XF$XG$XH$XI$XJ$XK$XL$XM$XN" \
+#  '-m,2,-v,-C,1,-o' "$z0$XC$XD$XE$XF$XG$XH$XI$XJ$XK$XL$XM$XN" \
+
+# Test execution and reporting.
+t=1
+while test xx != "x$1"; do
+  opts=$(echo "$1" | sed 's/,/ /g')
+  expect="$2"
+  shift 2
+
+  output=$({ grep -F -n -b $opts yes 2>/dev/null; echo "?$?"; sed 's!^!X!'; } < "$yn" | tr '\n' '/')
+
+  if test "$output" != "$expect" || test "$VERBOSE" = "1"; then
+    echo " Test #$t:  { grep -F -n -b $opts yes; echo \"?\$?\"; sed 's!^!X!'; }"
+    echo "  output:  \"$output\""
+  fi
+  if test "$output" != "$expect"; then
+    echo "  expect:  \"$expect\""
+    echo '    FAIL'
+    failures=1
+  elif test "$VERBOSE" = "1"; then
+    echo '    PASS'
+  fi
+
+  t=$(expr $t + 1)
+done
+
+Exit $failures
diff --git a/src/grep/tests/z-anchor-newline b/src/grep/tests/z-anchor-newline
new file mode 100755
index 0000000..cacce66
--- /dev/null
+++ b/src/grep/tests/z-anchor-newline
@@ -0,0 +1,42 @@
+#!/bin/sh
+# grep -z with an anchor in the regex could mistakenly match text
+# including a newline.
+
+# Copyright 2016-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+require_compiled_in_MB_support
+LC_ALL=en_US.UTF-8
+
+printf 'a\nb\0' > in || framework_failure_
+
+fail=0
+
+# These three would all mistakenly match, because the [a-b] range
+# forced the non-DFA (regexp-using) code path.
+returns_ 1 grep -z '^[a-b]*$' in || fail=1
+returns_ 1 grep -z 'a[a-b]*$' in || fail=1
+returns_ 1 grep -z '^[a-b]*b' in || fail=1
+
+# Test these for good measure; they exercise the DFA code path
+# and always worked
+returns_ 1 grep -z '^[ab]*$' in || fail=1
+returns_ 1 grep -z 'a[ab]*$' in || fail=1
+returns_ 1 grep -z '^[ab]*b' in || fail=1
+
+Exit $fail
diff --git a/src/grep/thanks-gen b/src/grep/thanks-gen
new file mode 100755
index 0000000..f1c11b3
--- /dev/null
+++ b/src/grep/thanks-gen
@@ -0,0 +1,16 @@
+#!/usr/bin/perl -nl
+# Use Perl's multi-byte alignment code, via sprintf, while
+# performing a rudimentary check for duplicate names and
+# removing duplicate name,email pairs.
+use Encode;
+
+BEGIN { my (%seen, %name) }
+
+chomp;
+my ($name, $email) = split '\0', decode ('UTF-8', $_);
+
+$seen{$name}++
+  and warn "$0: THANKS.in: duplicate name: $name\n";
+
+print encode ('UTF-8', sprintf ('%-36s', $name)), $email
+  unless $seen{"$name\0$email"}++;